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a723baf1 | 1 | /* C++ Parser. |
3beb3abf | 2 | Copyright (C) 2000, 2001, 2002, 2003 Free Software Foundation, Inc. |
a723baf1 MM |
3 | Written by Mark Mitchell <mark@codesourcery.com>. |
4 | ||
f5adbb8d | 5 | This file is part of GCC. |
a723baf1 | 6 | |
f5adbb8d | 7 | GCC is free software; you can redistribute it and/or modify it |
a723baf1 MM |
8 | under the terms of the GNU General Public License as published by |
9 | the Free Software Foundation; either version 2, or (at your option) | |
10 | any later version. | |
11 | ||
f5adbb8d | 12 | GCC is distributed in the hope that it will be useful, but |
a723baf1 MM |
13 | WITHOUT ANY WARRANTY; without even the implied warranty of |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
15 | General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
f5adbb8d | 18 | along with GCC; see the file COPYING. If not, write to the Free |
a723baf1 MM |
19 | Software Foundation, 59 Temple Place - Suite 330, Boston, MA |
20 | 02111-1307, USA. */ | |
21 | ||
22 | #include "config.h" | |
23 | #include "system.h" | |
24 | #include "coretypes.h" | |
25 | #include "tm.h" | |
26 | #include "dyn-string.h" | |
27 | #include "varray.h" | |
28 | #include "cpplib.h" | |
29 | #include "tree.h" | |
30 | #include "cp-tree.h" | |
31 | #include "c-pragma.h" | |
32 | #include "decl.h" | |
33 | #include "flags.h" | |
34 | #include "diagnostic.h" | |
a723baf1 MM |
35 | #include "toplev.h" |
36 | #include "output.h" | |
37 | ||
38 | \f | |
39 | /* The lexer. */ | |
40 | ||
41 | /* Overview | |
42 | -------- | |
43 | ||
44 | A cp_lexer represents a stream of cp_tokens. It allows arbitrary | |
45 | look-ahead. | |
46 | ||
47 | Methodology | |
48 | ----------- | |
49 | ||
50 | We use a circular buffer to store incoming tokens. | |
51 | ||
52 | Some artifacts of the C++ language (such as the | |
53 | expression/declaration ambiguity) require arbitrary look-ahead. | |
54 | The strategy we adopt for dealing with these problems is to attempt | |
55 | to parse one construct (e.g., the declaration) and fall back to the | |
56 | other (e.g., the expression) if that attempt does not succeed. | |
57 | Therefore, we must sometimes store an arbitrary number of tokens. | |
58 | ||
59 | The parser routinely peeks at the next token, and then consumes it | |
60 | later. That also requires a buffer in which to store the tokens. | |
61 | ||
62 | In order to easily permit adding tokens to the end of the buffer, | |
63 | while removing them from the beginning of the buffer, we use a | |
64 | circular buffer. */ | |
65 | ||
66 | /* A C++ token. */ | |
67 | ||
68 | typedef struct cp_token GTY (()) | |
69 | { | |
70 | /* The kind of token. */ | |
522df488 | 71 | enum cpp_ttype type : 8; |
a723baf1 MM |
72 | /* If this token is a keyword, this value indicates which keyword. |
73 | Otherwise, this value is RID_MAX. */ | |
522df488 DN |
74 | enum rid keyword : 8; |
75 | /* The value associated with this token, if any. */ | |
76 | tree value; | |
82a98427 NS |
77 | /* The location at which this token was found. */ |
78 | location_t location; | |
a723baf1 MM |
79 | } cp_token; |
80 | ||
522df488 DN |
81 | /* The number of tokens in a single token block. |
82 | Computed so that cp_token_block fits in a 512B allocation unit. */ | |
a723baf1 | 83 | |
522df488 | 84 | #define CP_TOKEN_BLOCK_NUM_TOKENS ((512 - 3*sizeof (char*))/sizeof (cp_token)) |
a723baf1 MM |
85 | |
86 | /* A group of tokens. These groups are chained together to store | |
87 | large numbers of tokens. (For example, a token block is created | |
88 | when the body of an inline member function is first encountered; | |
89 | the tokens are processed later after the class definition is | |
90 | complete.) | |
91 | ||
92 | This somewhat ungainly data structure (as opposed to, say, a | |
34cd5ae7 | 93 | variable-length array), is used due to constraints imposed by the |
a723baf1 MM |
94 | current garbage-collection methodology. If it is made more |
95 | flexible, we could perhaps simplify the data structures involved. */ | |
96 | ||
97 | typedef struct cp_token_block GTY (()) | |
98 | { | |
99 | /* The tokens. */ | |
100 | cp_token tokens[CP_TOKEN_BLOCK_NUM_TOKENS]; | |
101 | /* The number of tokens in this block. */ | |
102 | size_t num_tokens; | |
103 | /* The next token block in the chain. */ | |
104 | struct cp_token_block *next; | |
105 | /* The previous block in the chain. */ | |
106 | struct cp_token_block *prev; | |
107 | } cp_token_block; | |
108 | ||
109 | typedef struct cp_token_cache GTY (()) | |
110 | { | |
111 | /* The first block in the cache. NULL if there are no tokens in the | |
112 | cache. */ | |
113 | cp_token_block *first; | |
114 | /* The last block in the cache. NULL If there are no tokens in the | |
115 | cache. */ | |
116 | cp_token_block *last; | |
117 | } cp_token_cache; | |
118 | ||
9bcb9aae | 119 | /* Prototypes. */ |
a723baf1 MM |
120 | |
121 | static cp_token_cache *cp_token_cache_new | |
122 | (void); | |
123 | static void cp_token_cache_push_token | |
124 | (cp_token_cache *, cp_token *); | |
125 | ||
126 | /* Create a new cp_token_cache. */ | |
127 | ||
128 | static cp_token_cache * | |
129 | cp_token_cache_new () | |
130 | { | |
c68b0a84 | 131 | return ggc_alloc_cleared (sizeof (cp_token_cache)); |
a723baf1 MM |
132 | } |
133 | ||
134 | /* Add *TOKEN to *CACHE. */ | |
135 | ||
136 | static void | |
137 | cp_token_cache_push_token (cp_token_cache *cache, | |
138 | cp_token *token) | |
139 | { | |
140 | cp_token_block *b = cache->last; | |
141 | ||
142 | /* See if we need to allocate a new token block. */ | |
143 | if (!b || b->num_tokens == CP_TOKEN_BLOCK_NUM_TOKENS) | |
144 | { | |
c68b0a84 | 145 | b = ggc_alloc_cleared (sizeof (cp_token_block)); |
a723baf1 MM |
146 | b->prev = cache->last; |
147 | if (cache->last) | |
148 | { | |
149 | cache->last->next = b; | |
150 | cache->last = b; | |
151 | } | |
152 | else | |
153 | cache->first = cache->last = b; | |
154 | } | |
155 | /* Add this token to the current token block. */ | |
156 | b->tokens[b->num_tokens++] = *token; | |
157 | } | |
158 | ||
159 | /* The cp_lexer structure represents the C++ lexer. It is responsible | |
160 | for managing the token stream from the preprocessor and supplying | |
161 | it to the parser. */ | |
162 | ||
163 | typedef struct cp_lexer GTY (()) | |
164 | { | |
165 | /* The memory allocated for the buffer. Never NULL. */ | |
166 | cp_token * GTY ((length ("(%h.buffer_end - %h.buffer)"))) buffer; | |
167 | /* A pointer just past the end of the memory allocated for the buffer. */ | |
168 | cp_token * GTY ((skip (""))) buffer_end; | |
169 | /* The first valid token in the buffer, or NULL if none. */ | |
170 | cp_token * GTY ((skip (""))) first_token; | |
171 | /* The next available token. If NEXT_TOKEN is NULL, then there are | |
172 | no more available tokens. */ | |
173 | cp_token * GTY ((skip (""))) next_token; | |
174 | /* A pointer just past the last available token. If FIRST_TOKEN is | |
175 | NULL, however, there are no available tokens, and then this | |
176 | location is simply the place in which the next token read will be | |
177 | placed. If LAST_TOKEN == FIRST_TOKEN, then the buffer is full. | |
178 | When the LAST_TOKEN == BUFFER, then the last token is at the | |
179 | highest memory address in the BUFFER. */ | |
180 | cp_token * GTY ((skip (""))) last_token; | |
181 | ||
182 | /* A stack indicating positions at which cp_lexer_save_tokens was | |
183 | called. The top entry is the most recent position at which we | |
184 | began saving tokens. The entries are differences in token | |
185 | position between FIRST_TOKEN and the first saved token. | |
186 | ||
187 | If the stack is non-empty, we are saving tokens. When a token is | |
188 | consumed, the NEXT_TOKEN pointer will move, but the FIRST_TOKEN | |
189 | pointer will not. The token stream will be preserved so that it | |
190 | can be reexamined later. | |
191 | ||
192 | If the stack is empty, then we are not saving tokens. Whenever a | |
193 | token is consumed, the FIRST_TOKEN pointer will be moved, and the | |
194 | consumed token will be gone forever. */ | |
195 | varray_type saved_tokens; | |
196 | ||
197 | /* The STRING_CST tokens encountered while processing the current | |
198 | string literal. */ | |
199 | varray_type string_tokens; | |
200 | ||
201 | /* True if we should obtain more tokens from the preprocessor; false | |
202 | if we are processing a saved token cache. */ | |
203 | bool main_lexer_p; | |
204 | ||
205 | /* True if we should output debugging information. */ | |
206 | bool debugging_p; | |
207 | ||
208 | /* The next lexer in a linked list of lexers. */ | |
209 | struct cp_lexer *next; | |
210 | } cp_lexer; | |
211 | ||
212 | /* Prototypes. */ | |
213 | ||
17211ab5 | 214 | static cp_lexer *cp_lexer_new_main |
94edc4ab | 215 | (void); |
a723baf1 | 216 | static cp_lexer *cp_lexer_new_from_tokens |
94edc4ab | 217 | (struct cp_token_cache *); |
a723baf1 | 218 | static int cp_lexer_saving_tokens |
94edc4ab | 219 | (const cp_lexer *); |
a723baf1 | 220 | static cp_token *cp_lexer_next_token |
94edc4ab NN |
221 | (cp_lexer *, cp_token *); |
222 | static ptrdiff_t cp_lexer_token_difference | |
223 | (cp_lexer *, cp_token *, cp_token *); | |
a723baf1 | 224 | static cp_token *cp_lexer_read_token |
94edc4ab | 225 | (cp_lexer *); |
a723baf1 | 226 | static void cp_lexer_maybe_grow_buffer |
94edc4ab | 227 | (cp_lexer *); |
a723baf1 | 228 | static void cp_lexer_get_preprocessor_token |
94edc4ab | 229 | (cp_lexer *, cp_token *); |
a723baf1 | 230 | static cp_token *cp_lexer_peek_token |
94edc4ab | 231 | (cp_lexer *); |
a723baf1 | 232 | static cp_token *cp_lexer_peek_nth_token |
94edc4ab | 233 | (cp_lexer *, size_t); |
f7b5ecd9 | 234 | static inline bool cp_lexer_next_token_is |
94edc4ab | 235 | (cp_lexer *, enum cpp_ttype); |
a723baf1 | 236 | static bool cp_lexer_next_token_is_not |
94edc4ab | 237 | (cp_lexer *, enum cpp_ttype); |
a723baf1 | 238 | static bool cp_lexer_next_token_is_keyword |
94edc4ab NN |
239 | (cp_lexer *, enum rid); |
240 | static cp_token *cp_lexer_consume_token | |
241 | (cp_lexer *); | |
a723baf1 MM |
242 | static void cp_lexer_purge_token |
243 | (cp_lexer *); | |
244 | static void cp_lexer_purge_tokens_after | |
245 | (cp_lexer *, cp_token *); | |
246 | static void cp_lexer_save_tokens | |
94edc4ab | 247 | (cp_lexer *); |
a723baf1 | 248 | static void cp_lexer_commit_tokens |
94edc4ab | 249 | (cp_lexer *); |
a723baf1 | 250 | static void cp_lexer_rollback_tokens |
94edc4ab | 251 | (cp_lexer *); |
f7b5ecd9 | 252 | static inline void cp_lexer_set_source_position_from_token |
94edc4ab | 253 | (cp_lexer *, const cp_token *); |
a723baf1 | 254 | static void cp_lexer_print_token |
94edc4ab | 255 | (FILE *, cp_token *); |
f7b5ecd9 | 256 | static inline bool cp_lexer_debugging_p |
94edc4ab | 257 | (cp_lexer *); |
a723baf1 | 258 | static void cp_lexer_start_debugging |
94edc4ab | 259 | (cp_lexer *) ATTRIBUTE_UNUSED; |
a723baf1 | 260 | static void cp_lexer_stop_debugging |
94edc4ab | 261 | (cp_lexer *) ATTRIBUTE_UNUSED; |
a723baf1 MM |
262 | |
263 | /* Manifest constants. */ | |
264 | ||
265 | #define CP_TOKEN_BUFFER_SIZE 5 | |
266 | #define CP_SAVED_TOKENS_SIZE 5 | |
267 | ||
268 | /* A token type for keywords, as opposed to ordinary identifiers. */ | |
269 | #define CPP_KEYWORD ((enum cpp_ttype) (N_TTYPES + 1)) | |
270 | ||
271 | /* A token type for template-ids. If a template-id is processed while | |
272 | parsing tentatively, it is replaced with a CPP_TEMPLATE_ID token; | |
273 | the value of the CPP_TEMPLATE_ID is whatever was returned by | |
274 | cp_parser_template_id. */ | |
275 | #define CPP_TEMPLATE_ID ((enum cpp_ttype) (CPP_KEYWORD + 1)) | |
276 | ||
277 | /* A token type for nested-name-specifiers. If a | |
278 | nested-name-specifier is processed while parsing tentatively, it is | |
279 | replaced with a CPP_NESTED_NAME_SPECIFIER token; the value of the | |
280 | CPP_NESTED_NAME_SPECIFIER is whatever was returned by | |
281 | cp_parser_nested_name_specifier_opt. */ | |
282 | #define CPP_NESTED_NAME_SPECIFIER ((enum cpp_ttype) (CPP_TEMPLATE_ID + 1)) | |
283 | ||
284 | /* A token type for tokens that are not tokens at all; these are used | |
285 | to mark the end of a token block. */ | |
286 | #define CPP_NONE (CPP_NESTED_NAME_SPECIFIER + 1) | |
287 | ||
288 | /* Variables. */ | |
289 | ||
290 | /* The stream to which debugging output should be written. */ | |
291 | static FILE *cp_lexer_debug_stream; | |
292 | ||
17211ab5 GK |
293 | /* Create a new main C++ lexer, the lexer that gets tokens from the |
294 | preprocessor. */ | |
a723baf1 MM |
295 | |
296 | static cp_lexer * | |
17211ab5 | 297 | cp_lexer_new_main (void) |
a723baf1 MM |
298 | { |
299 | cp_lexer *lexer; | |
17211ab5 GK |
300 | cp_token first_token; |
301 | ||
302 | /* It's possible that lexing the first token will load a PCH file, | |
303 | which is a GC collection point. So we have to grab the first | |
304 | token before allocating any memory. */ | |
305 | cp_lexer_get_preprocessor_token (NULL, &first_token); | |
18c81520 | 306 | c_common_no_more_pch (); |
a723baf1 MM |
307 | |
308 | /* Allocate the memory. */ | |
c68b0a84 | 309 | lexer = ggc_alloc_cleared (sizeof (cp_lexer)); |
a723baf1 MM |
310 | |
311 | /* Create the circular buffer. */ | |
c68b0a84 | 312 | lexer->buffer = ggc_calloc (CP_TOKEN_BUFFER_SIZE, sizeof (cp_token)); |
a723baf1 MM |
313 | lexer->buffer_end = lexer->buffer + CP_TOKEN_BUFFER_SIZE; |
314 | ||
17211ab5 GK |
315 | /* There is one token in the buffer. */ |
316 | lexer->last_token = lexer->buffer + 1; | |
317 | lexer->first_token = lexer->buffer; | |
318 | lexer->next_token = lexer->buffer; | |
319 | memcpy (lexer->buffer, &first_token, sizeof (cp_token)); | |
a723baf1 MM |
320 | |
321 | /* This lexer obtains more tokens by calling c_lex. */ | |
17211ab5 | 322 | lexer->main_lexer_p = true; |
a723baf1 MM |
323 | |
324 | /* Create the SAVED_TOKENS stack. */ | |
325 | VARRAY_INT_INIT (lexer->saved_tokens, CP_SAVED_TOKENS_SIZE, "saved_tokens"); | |
326 | ||
327 | /* Create the STRINGS array. */ | |
328 | VARRAY_TREE_INIT (lexer->string_tokens, 32, "strings"); | |
329 | ||
330 | /* Assume we are not debugging. */ | |
331 | lexer->debugging_p = false; | |
332 | ||
333 | return lexer; | |
334 | } | |
335 | ||
336 | /* Create a new lexer whose token stream is primed with the TOKENS. | |
337 | When these tokens are exhausted, no new tokens will be read. */ | |
338 | ||
339 | static cp_lexer * | |
340 | cp_lexer_new_from_tokens (cp_token_cache *tokens) | |
341 | { | |
342 | cp_lexer *lexer; | |
343 | cp_token *token; | |
344 | cp_token_block *block; | |
345 | ptrdiff_t num_tokens; | |
346 | ||
17211ab5 | 347 | /* Allocate the memory. */ |
c68b0a84 | 348 | lexer = ggc_alloc_cleared (sizeof (cp_lexer)); |
a723baf1 MM |
349 | |
350 | /* Create a new buffer, appropriately sized. */ | |
351 | num_tokens = 0; | |
352 | for (block = tokens->first; block != NULL; block = block->next) | |
353 | num_tokens += block->num_tokens; | |
c68b0a84 | 354 | lexer->buffer = ggc_alloc (num_tokens * sizeof (cp_token)); |
a723baf1 MM |
355 | lexer->buffer_end = lexer->buffer + num_tokens; |
356 | ||
357 | /* Install the tokens. */ | |
358 | token = lexer->buffer; | |
359 | for (block = tokens->first; block != NULL; block = block->next) | |
360 | { | |
361 | memcpy (token, block->tokens, block->num_tokens * sizeof (cp_token)); | |
362 | token += block->num_tokens; | |
363 | } | |
364 | ||
365 | /* The FIRST_TOKEN is the beginning of the buffer. */ | |
366 | lexer->first_token = lexer->buffer; | |
367 | /* The next available token is also at the beginning of the buffer. */ | |
368 | lexer->next_token = lexer->buffer; | |
369 | /* The buffer is full. */ | |
370 | lexer->last_token = lexer->first_token; | |
371 | ||
17211ab5 GK |
372 | /* This lexer doesn't obtain more tokens. */ |
373 | lexer->main_lexer_p = false; | |
374 | ||
375 | /* Create the SAVED_TOKENS stack. */ | |
376 | VARRAY_INT_INIT (lexer->saved_tokens, CP_SAVED_TOKENS_SIZE, "saved_tokens"); | |
377 | ||
378 | /* Create the STRINGS array. */ | |
379 | VARRAY_TREE_INIT (lexer->string_tokens, 32, "strings"); | |
380 | ||
381 | /* Assume we are not debugging. */ | |
382 | lexer->debugging_p = false; | |
383 | ||
a723baf1 MM |
384 | return lexer; |
385 | } | |
386 | ||
4de8668e | 387 | /* Returns nonzero if debugging information should be output. */ |
a723baf1 | 388 | |
f7b5ecd9 MM |
389 | static inline bool |
390 | cp_lexer_debugging_p (cp_lexer *lexer) | |
a723baf1 | 391 | { |
f7b5ecd9 MM |
392 | return lexer->debugging_p; |
393 | } | |
394 | ||
395 | /* Set the current source position from the information stored in | |
396 | TOKEN. */ | |
397 | ||
398 | static inline void | |
94edc4ab NN |
399 | cp_lexer_set_source_position_from_token (cp_lexer *lexer ATTRIBUTE_UNUSED , |
400 | const cp_token *token) | |
f7b5ecd9 MM |
401 | { |
402 | /* Ideally, the source position information would not be a global | |
403 | variable, but it is. */ | |
404 | ||
405 | /* Update the line number. */ | |
406 | if (token->type != CPP_EOF) | |
82a98427 | 407 | input_location = token->location; |
a723baf1 MM |
408 | } |
409 | ||
410 | /* TOKEN points into the circular token buffer. Return a pointer to | |
411 | the next token in the buffer. */ | |
412 | ||
f7b5ecd9 | 413 | static inline cp_token * |
94edc4ab | 414 | cp_lexer_next_token (cp_lexer* lexer, cp_token* token) |
a723baf1 MM |
415 | { |
416 | token++; | |
417 | if (token == lexer->buffer_end) | |
418 | token = lexer->buffer; | |
419 | return token; | |
420 | } | |
421 | ||
4de8668e | 422 | /* nonzero if we are presently saving tokens. */ |
f7b5ecd9 MM |
423 | |
424 | static int | |
94edc4ab | 425 | cp_lexer_saving_tokens (const cp_lexer* lexer) |
f7b5ecd9 MM |
426 | { |
427 | return VARRAY_ACTIVE_SIZE (lexer->saved_tokens) != 0; | |
428 | } | |
429 | ||
a723baf1 MM |
430 | /* Return a pointer to the token that is N tokens beyond TOKEN in the |
431 | buffer. */ | |
432 | ||
433 | static cp_token * | |
434 | cp_lexer_advance_token (cp_lexer *lexer, cp_token *token, ptrdiff_t n) | |
435 | { | |
436 | token += n; | |
437 | if (token >= lexer->buffer_end) | |
438 | token = lexer->buffer + (token - lexer->buffer_end); | |
439 | return token; | |
440 | } | |
441 | ||
442 | /* Returns the number of times that START would have to be incremented | |
443 | to reach FINISH. If START and FINISH are the same, returns zero. */ | |
444 | ||
445 | static ptrdiff_t | |
94edc4ab | 446 | cp_lexer_token_difference (cp_lexer* lexer, cp_token* start, cp_token* finish) |
a723baf1 MM |
447 | { |
448 | if (finish >= start) | |
449 | return finish - start; | |
450 | else | |
451 | return ((lexer->buffer_end - lexer->buffer) | |
452 | - (start - finish)); | |
453 | } | |
454 | ||
455 | /* Obtain another token from the C preprocessor and add it to the | |
456 | token buffer. Returns the newly read token. */ | |
457 | ||
458 | static cp_token * | |
94edc4ab | 459 | cp_lexer_read_token (cp_lexer* lexer) |
a723baf1 MM |
460 | { |
461 | cp_token *token; | |
462 | ||
463 | /* Make sure there is room in the buffer. */ | |
464 | cp_lexer_maybe_grow_buffer (lexer); | |
465 | ||
466 | /* If there weren't any tokens, then this one will be the first. */ | |
467 | if (!lexer->first_token) | |
468 | lexer->first_token = lexer->last_token; | |
469 | /* Similarly, if there were no available tokens, there is one now. */ | |
470 | if (!lexer->next_token) | |
471 | lexer->next_token = lexer->last_token; | |
472 | ||
473 | /* Figure out where we're going to store the new token. */ | |
474 | token = lexer->last_token; | |
475 | ||
476 | /* Get a new token from the preprocessor. */ | |
477 | cp_lexer_get_preprocessor_token (lexer, token); | |
478 | ||
479 | /* Increment LAST_TOKEN. */ | |
480 | lexer->last_token = cp_lexer_next_token (lexer, token); | |
481 | ||
e6cc3a24 ZW |
482 | /* Strings should have type `const char []'. Right now, we will |
483 | have an ARRAY_TYPE that is constant rather than an array of | |
484 | constant elements. | |
485 | FIXME: Make fix_string_type get this right in the first place. */ | |
486 | if ((token->type == CPP_STRING || token->type == CPP_WSTRING) | |
487 | && flag_const_strings) | |
a723baf1 | 488 | { |
e6cc3a24 ZW |
489 | tree type; |
490 | ||
491 | /* Get the current type. It will be an ARRAY_TYPE. */ | |
492 | type = TREE_TYPE (token->value); | |
493 | /* Use build_cplus_array_type to rebuild the array, thereby | |
494 | getting the right type. */ | |
495 | type = build_cplus_array_type (TREE_TYPE (type), TYPE_DOMAIN (type)); | |
496 | /* Reset the type of the token. */ | |
497 | TREE_TYPE (token->value) = type; | |
a723baf1 MM |
498 | } |
499 | ||
500 | return token; | |
501 | } | |
502 | ||
503 | /* If the circular buffer is full, make it bigger. */ | |
504 | ||
505 | static void | |
94edc4ab | 506 | cp_lexer_maybe_grow_buffer (cp_lexer* lexer) |
a723baf1 MM |
507 | { |
508 | /* If the buffer is full, enlarge it. */ | |
509 | if (lexer->last_token == lexer->first_token) | |
510 | { | |
511 | cp_token *new_buffer; | |
512 | cp_token *old_buffer; | |
513 | cp_token *new_first_token; | |
514 | ptrdiff_t buffer_length; | |
515 | size_t num_tokens_to_copy; | |
516 | ||
517 | /* Remember the current buffer pointer. It will become invalid, | |
518 | but we will need to do pointer arithmetic involving this | |
519 | value. */ | |
520 | old_buffer = lexer->buffer; | |
521 | /* Compute the current buffer size. */ | |
522 | buffer_length = lexer->buffer_end - lexer->buffer; | |
523 | /* Allocate a buffer twice as big. */ | |
c68b0a84 KG |
524 | new_buffer = ggc_realloc (lexer->buffer, |
525 | 2 * buffer_length * sizeof (cp_token)); | |
a723baf1 MM |
526 | |
527 | /* Because the buffer is circular, logically consecutive tokens | |
528 | are not necessarily placed consecutively in memory. | |
529 | Therefore, we must keep move the tokens that were before | |
530 | FIRST_TOKEN to the second half of the newly allocated | |
531 | buffer. */ | |
532 | num_tokens_to_copy = (lexer->first_token - old_buffer); | |
533 | memcpy (new_buffer + buffer_length, | |
534 | new_buffer, | |
535 | num_tokens_to_copy * sizeof (cp_token)); | |
536 | /* Clear the rest of the buffer. We never look at this storage, | |
537 | but the garbage collector may. */ | |
538 | memset (new_buffer + buffer_length + num_tokens_to_copy, 0, | |
539 | (buffer_length - num_tokens_to_copy) * sizeof (cp_token)); | |
540 | ||
541 | /* Now recompute all of the buffer pointers. */ | |
542 | new_first_token | |
543 | = new_buffer + (lexer->first_token - old_buffer); | |
544 | if (lexer->next_token != NULL) | |
545 | { | |
546 | ptrdiff_t next_token_delta; | |
547 | ||
548 | if (lexer->next_token > lexer->first_token) | |
549 | next_token_delta = lexer->next_token - lexer->first_token; | |
550 | else | |
551 | next_token_delta = | |
552 | buffer_length - (lexer->first_token - lexer->next_token); | |
553 | lexer->next_token = new_first_token + next_token_delta; | |
554 | } | |
555 | lexer->last_token = new_first_token + buffer_length; | |
556 | lexer->buffer = new_buffer; | |
557 | lexer->buffer_end = new_buffer + buffer_length * 2; | |
558 | lexer->first_token = new_first_token; | |
559 | } | |
560 | } | |
561 | ||
562 | /* Store the next token from the preprocessor in *TOKEN. */ | |
563 | ||
564 | static void | |
94edc4ab NN |
565 | cp_lexer_get_preprocessor_token (cp_lexer *lexer ATTRIBUTE_UNUSED , |
566 | cp_token *token) | |
a723baf1 MM |
567 | { |
568 | bool done; | |
569 | ||
570 | /* If this not the main lexer, return a terminating CPP_EOF token. */ | |
17211ab5 | 571 | if (lexer != NULL && !lexer->main_lexer_p) |
a723baf1 MM |
572 | { |
573 | token->type = CPP_EOF; | |
82a98427 NS |
574 | token->location.line = 0; |
575 | token->location.file = NULL; | |
a723baf1 MM |
576 | token->value = NULL_TREE; |
577 | token->keyword = RID_MAX; | |
578 | ||
579 | return; | |
580 | } | |
581 | ||
582 | done = false; | |
583 | /* Keep going until we get a token we like. */ | |
584 | while (!done) | |
585 | { | |
586 | /* Get a new token from the preprocessor. */ | |
587 | token->type = c_lex (&token->value); | |
588 | /* Issue messages about tokens we cannot process. */ | |
589 | switch (token->type) | |
590 | { | |
591 | case CPP_ATSIGN: | |
592 | case CPP_HASH: | |
593 | case CPP_PASTE: | |
594 | error ("invalid token"); | |
595 | break; | |
596 | ||
a723baf1 MM |
597 | default: |
598 | /* This is a good token, so we exit the loop. */ | |
599 | done = true; | |
600 | break; | |
601 | } | |
602 | } | |
603 | /* Now we've got our token. */ | |
82a98427 | 604 | token->location = input_location; |
a723baf1 MM |
605 | |
606 | /* Check to see if this token is a keyword. */ | |
607 | if (token->type == CPP_NAME | |
608 | && C_IS_RESERVED_WORD (token->value)) | |
609 | { | |
610 | /* Mark this token as a keyword. */ | |
611 | token->type = CPP_KEYWORD; | |
612 | /* Record which keyword. */ | |
613 | token->keyword = C_RID_CODE (token->value); | |
614 | /* Update the value. Some keywords are mapped to particular | |
615 | entities, rather than simply having the value of the | |
616 | corresponding IDENTIFIER_NODE. For example, `__const' is | |
617 | mapped to `const'. */ | |
618 | token->value = ridpointers[token->keyword]; | |
619 | } | |
620 | else | |
621 | token->keyword = RID_MAX; | |
622 | } | |
623 | ||
624 | /* Return a pointer to the next token in the token stream, but do not | |
625 | consume it. */ | |
626 | ||
627 | static cp_token * | |
94edc4ab | 628 | cp_lexer_peek_token (cp_lexer* lexer) |
a723baf1 MM |
629 | { |
630 | cp_token *token; | |
631 | ||
632 | /* If there are no tokens, read one now. */ | |
633 | if (!lexer->next_token) | |
634 | cp_lexer_read_token (lexer); | |
635 | ||
636 | /* Provide debugging output. */ | |
637 | if (cp_lexer_debugging_p (lexer)) | |
638 | { | |
639 | fprintf (cp_lexer_debug_stream, "cp_lexer: peeking at token: "); | |
640 | cp_lexer_print_token (cp_lexer_debug_stream, lexer->next_token); | |
641 | fprintf (cp_lexer_debug_stream, "\n"); | |
642 | } | |
643 | ||
644 | token = lexer->next_token; | |
645 | cp_lexer_set_source_position_from_token (lexer, token); | |
646 | return token; | |
647 | } | |
648 | ||
649 | /* Return true if the next token has the indicated TYPE. */ | |
650 | ||
651 | static bool | |
94edc4ab | 652 | cp_lexer_next_token_is (cp_lexer* lexer, enum cpp_ttype type) |
a723baf1 MM |
653 | { |
654 | cp_token *token; | |
655 | ||
656 | /* Peek at the next token. */ | |
657 | token = cp_lexer_peek_token (lexer); | |
658 | /* Check to see if it has the indicated TYPE. */ | |
659 | return token->type == type; | |
660 | } | |
661 | ||
662 | /* Return true if the next token does not have the indicated TYPE. */ | |
663 | ||
664 | static bool | |
94edc4ab | 665 | cp_lexer_next_token_is_not (cp_lexer* lexer, enum cpp_ttype type) |
a723baf1 MM |
666 | { |
667 | return !cp_lexer_next_token_is (lexer, type); | |
668 | } | |
669 | ||
670 | /* Return true if the next token is the indicated KEYWORD. */ | |
671 | ||
672 | static bool | |
94edc4ab | 673 | cp_lexer_next_token_is_keyword (cp_lexer* lexer, enum rid keyword) |
a723baf1 MM |
674 | { |
675 | cp_token *token; | |
676 | ||
677 | /* Peek at the next token. */ | |
678 | token = cp_lexer_peek_token (lexer); | |
679 | /* Check to see if it is the indicated keyword. */ | |
680 | return token->keyword == keyword; | |
681 | } | |
682 | ||
683 | /* Return a pointer to the Nth token in the token stream. If N is 1, | |
684 | then this is precisely equivalent to cp_lexer_peek_token. */ | |
685 | ||
686 | static cp_token * | |
94edc4ab | 687 | cp_lexer_peek_nth_token (cp_lexer* lexer, size_t n) |
a723baf1 MM |
688 | { |
689 | cp_token *token; | |
690 | ||
691 | /* N is 1-based, not zero-based. */ | |
692 | my_friendly_assert (n > 0, 20000224); | |
693 | ||
694 | /* Skip ahead from NEXT_TOKEN, reading more tokens as necessary. */ | |
695 | token = lexer->next_token; | |
696 | /* If there are no tokens in the buffer, get one now. */ | |
697 | if (!token) | |
698 | { | |
699 | cp_lexer_read_token (lexer); | |
700 | token = lexer->next_token; | |
701 | } | |
702 | ||
703 | /* Now, read tokens until we have enough. */ | |
704 | while (--n > 0) | |
705 | { | |
706 | /* Advance to the next token. */ | |
707 | token = cp_lexer_next_token (lexer, token); | |
708 | /* If that's all the tokens we have, read a new one. */ | |
709 | if (token == lexer->last_token) | |
710 | token = cp_lexer_read_token (lexer); | |
711 | } | |
712 | ||
713 | return token; | |
714 | } | |
715 | ||
716 | /* Consume the next token. The pointer returned is valid only until | |
717 | another token is read. Callers should preserve copy the token | |
718 | explicitly if they will need its value for a longer period of | |
719 | time. */ | |
720 | ||
721 | static cp_token * | |
94edc4ab | 722 | cp_lexer_consume_token (cp_lexer* lexer) |
a723baf1 MM |
723 | { |
724 | cp_token *token; | |
725 | ||
726 | /* If there are no tokens, read one now. */ | |
727 | if (!lexer->next_token) | |
728 | cp_lexer_read_token (lexer); | |
729 | ||
730 | /* Remember the token we'll be returning. */ | |
731 | token = lexer->next_token; | |
732 | ||
733 | /* Increment NEXT_TOKEN. */ | |
734 | lexer->next_token = cp_lexer_next_token (lexer, | |
735 | lexer->next_token); | |
736 | /* Check to see if we're all out of tokens. */ | |
737 | if (lexer->next_token == lexer->last_token) | |
738 | lexer->next_token = NULL; | |
739 | ||
740 | /* If we're not saving tokens, then move FIRST_TOKEN too. */ | |
741 | if (!cp_lexer_saving_tokens (lexer)) | |
742 | { | |
743 | /* If there are no tokens available, set FIRST_TOKEN to NULL. */ | |
744 | if (!lexer->next_token) | |
745 | lexer->first_token = NULL; | |
746 | else | |
747 | lexer->first_token = lexer->next_token; | |
748 | } | |
749 | ||
750 | /* Provide debugging output. */ | |
751 | if (cp_lexer_debugging_p (lexer)) | |
752 | { | |
753 | fprintf (cp_lexer_debug_stream, "cp_lexer: consuming token: "); | |
754 | cp_lexer_print_token (cp_lexer_debug_stream, token); | |
755 | fprintf (cp_lexer_debug_stream, "\n"); | |
756 | } | |
757 | ||
758 | return token; | |
759 | } | |
760 | ||
761 | /* Permanently remove the next token from the token stream. There | |
762 | must be a valid next token already; this token never reads | |
763 | additional tokens from the preprocessor. */ | |
764 | ||
765 | static void | |
766 | cp_lexer_purge_token (cp_lexer *lexer) | |
767 | { | |
768 | cp_token *token; | |
769 | cp_token *next_token; | |
770 | ||
771 | token = lexer->next_token; | |
772 | while (true) | |
773 | { | |
774 | next_token = cp_lexer_next_token (lexer, token); | |
775 | if (next_token == lexer->last_token) | |
776 | break; | |
777 | *token = *next_token; | |
778 | token = next_token; | |
779 | } | |
780 | ||
781 | lexer->last_token = token; | |
782 | /* The token purged may have been the only token remaining; if so, | |
783 | clear NEXT_TOKEN. */ | |
784 | if (lexer->next_token == token) | |
785 | lexer->next_token = NULL; | |
786 | } | |
787 | ||
788 | /* Permanently remove all tokens after TOKEN, up to, but not | |
789 | including, the token that will be returned next by | |
790 | cp_lexer_peek_token. */ | |
791 | ||
792 | static void | |
793 | cp_lexer_purge_tokens_after (cp_lexer *lexer, cp_token *token) | |
794 | { | |
795 | cp_token *peek; | |
796 | cp_token *t1; | |
797 | cp_token *t2; | |
798 | ||
799 | if (lexer->next_token) | |
800 | { | |
801 | /* Copy the tokens that have not yet been read to the location | |
802 | immediately following TOKEN. */ | |
803 | t1 = cp_lexer_next_token (lexer, token); | |
804 | t2 = peek = cp_lexer_peek_token (lexer); | |
805 | /* Move tokens into the vacant area between TOKEN and PEEK. */ | |
806 | while (t2 != lexer->last_token) | |
807 | { | |
808 | *t1 = *t2; | |
809 | t1 = cp_lexer_next_token (lexer, t1); | |
810 | t2 = cp_lexer_next_token (lexer, t2); | |
811 | } | |
812 | /* Now, the next available token is right after TOKEN. */ | |
813 | lexer->next_token = cp_lexer_next_token (lexer, token); | |
814 | /* And the last token is wherever we ended up. */ | |
815 | lexer->last_token = t1; | |
816 | } | |
817 | else | |
818 | { | |
819 | /* There are no tokens in the buffer, so there is nothing to | |
820 | copy. The last token in the buffer is TOKEN itself. */ | |
821 | lexer->last_token = cp_lexer_next_token (lexer, token); | |
822 | } | |
823 | } | |
824 | ||
825 | /* Begin saving tokens. All tokens consumed after this point will be | |
826 | preserved. */ | |
827 | ||
828 | static void | |
94edc4ab | 829 | cp_lexer_save_tokens (cp_lexer* lexer) |
a723baf1 MM |
830 | { |
831 | /* Provide debugging output. */ | |
832 | if (cp_lexer_debugging_p (lexer)) | |
833 | fprintf (cp_lexer_debug_stream, "cp_lexer: saving tokens\n"); | |
834 | ||
835 | /* Make sure that LEXER->NEXT_TOKEN is non-NULL so that we can | |
836 | restore the tokens if required. */ | |
837 | if (!lexer->next_token) | |
838 | cp_lexer_read_token (lexer); | |
839 | ||
840 | VARRAY_PUSH_INT (lexer->saved_tokens, | |
841 | cp_lexer_token_difference (lexer, | |
842 | lexer->first_token, | |
843 | lexer->next_token)); | |
844 | } | |
845 | ||
846 | /* Commit to the portion of the token stream most recently saved. */ | |
847 | ||
848 | static void | |
94edc4ab | 849 | cp_lexer_commit_tokens (cp_lexer* lexer) |
a723baf1 MM |
850 | { |
851 | /* Provide debugging output. */ | |
852 | if (cp_lexer_debugging_p (lexer)) | |
853 | fprintf (cp_lexer_debug_stream, "cp_lexer: committing tokens\n"); | |
854 | ||
855 | VARRAY_POP (lexer->saved_tokens); | |
856 | } | |
857 | ||
858 | /* Return all tokens saved since the last call to cp_lexer_save_tokens | |
859 | to the token stream. Stop saving tokens. */ | |
860 | ||
861 | static void | |
94edc4ab | 862 | cp_lexer_rollback_tokens (cp_lexer* lexer) |
a723baf1 MM |
863 | { |
864 | size_t delta; | |
865 | ||
866 | /* Provide debugging output. */ | |
867 | if (cp_lexer_debugging_p (lexer)) | |
868 | fprintf (cp_lexer_debug_stream, "cp_lexer: restoring tokens\n"); | |
869 | ||
870 | /* Find the token that was the NEXT_TOKEN when we started saving | |
871 | tokens. */ | |
872 | delta = VARRAY_TOP_INT(lexer->saved_tokens); | |
873 | /* Make it the next token again now. */ | |
874 | lexer->next_token = cp_lexer_advance_token (lexer, | |
875 | lexer->first_token, | |
876 | delta); | |
15d2cb19 | 877 | /* It might be the case that there were no tokens when we started |
a723baf1 MM |
878 | saving tokens, but that there are some tokens now. */ |
879 | if (!lexer->next_token && lexer->first_token) | |
880 | lexer->next_token = lexer->first_token; | |
881 | ||
882 | /* Stop saving tokens. */ | |
883 | VARRAY_POP (lexer->saved_tokens); | |
884 | } | |
885 | ||
a723baf1 MM |
886 | /* Print a representation of the TOKEN on the STREAM. */ |
887 | ||
888 | static void | |
94edc4ab | 889 | cp_lexer_print_token (FILE * stream, cp_token* token) |
a723baf1 MM |
890 | { |
891 | const char *token_type = NULL; | |
892 | ||
893 | /* Figure out what kind of token this is. */ | |
894 | switch (token->type) | |
895 | { | |
896 | case CPP_EQ: | |
897 | token_type = "EQ"; | |
898 | break; | |
899 | ||
900 | case CPP_COMMA: | |
901 | token_type = "COMMA"; | |
902 | break; | |
903 | ||
904 | case CPP_OPEN_PAREN: | |
905 | token_type = "OPEN_PAREN"; | |
906 | break; | |
907 | ||
908 | case CPP_CLOSE_PAREN: | |
909 | token_type = "CLOSE_PAREN"; | |
910 | break; | |
911 | ||
912 | case CPP_OPEN_BRACE: | |
913 | token_type = "OPEN_BRACE"; | |
914 | break; | |
915 | ||
916 | case CPP_CLOSE_BRACE: | |
917 | token_type = "CLOSE_BRACE"; | |
918 | break; | |
919 | ||
920 | case CPP_SEMICOLON: | |
921 | token_type = "SEMICOLON"; | |
922 | break; | |
923 | ||
924 | case CPP_NAME: | |
925 | token_type = "NAME"; | |
926 | break; | |
927 | ||
928 | case CPP_EOF: | |
929 | token_type = "EOF"; | |
930 | break; | |
931 | ||
932 | case CPP_KEYWORD: | |
933 | token_type = "keyword"; | |
934 | break; | |
935 | ||
936 | /* This is not a token that we know how to handle yet. */ | |
937 | default: | |
938 | break; | |
939 | } | |
940 | ||
941 | /* If we have a name for the token, print it out. Otherwise, we | |
942 | simply give the numeric code. */ | |
943 | if (token_type) | |
944 | fprintf (stream, "%s", token_type); | |
945 | else | |
946 | fprintf (stream, "%d", token->type); | |
947 | /* And, for an identifier, print the identifier name. */ | |
948 | if (token->type == CPP_NAME | |
949 | /* Some keywords have a value that is not an IDENTIFIER_NODE. | |
950 | For example, `struct' is mapped to an INTEGER_CST. */ | |
951 | || (token->type == CPP_KEYWORD | |
952 | && TREE_CODE (token->value) == IDENTIFIER_NODE)) | |
953 | fprintf (stream, " %s", IDENTIFIER_POINTER (token->value)); | |
954 | } | |
955 | ||
a723baf1 MM |
956 | /* Start emitting debugging information. */ |
957 | ||
958 | static void | |
94edc4ab | 959 | cp_lexer_start_debugging (cp_lexer* lexer) |
a723baf1 MM |
960 | { |
961 | ++lexer->debugging_p; | |
962 | } | |
963 | ||
964 | /* Stop emitting debugging information. */ | |
965 | ||
966 | static void | |
94edc4ab | 967 | cp_lexer_stop_debugging (cp_lexer* lexer) |
a723baf1 MM |
968 | { |
969 | --lexer->debugging_p; | |
970 | } | |
971 | ||
972 | \f | |
973 | /* The parser. */ | |
974 | ||
975 | /* Overview | |
976 | -------- | |
977 | ||
978 | A cp_parser parses the token stream as specified by the C++ | |
979 | grammar. Its job is purely parsing, not semantic analysis. For | |
980 | example, the parser breaks the token stream into declarators, | |
981 | expressions, statements, and other similar syntactic constructs. | |
982 | It does not check that the types of the expressions on either side | |
983 | of an assignment-statement are compatible, or that a function is | |
984 | not declared with a parameter of type `void'. | |
985 | ||
986 | The parser invokes routines elsewhere in the compiler to perform | |
987 | semantic analysis and to build up the abstract syntax tree for the | |
988 | code processed. | |
989 | ||
990 | The parser (and the template instantiation code, which is, in a | |
991 | way, a close relative of parsing) are the only parts of the | |
992 | compiler that should be calling push_scope and pop_scope, or | |
993 | related functions. The parser (and template instantiation code) | |
994 | keeps track of what scope is presently active; everything else | |
995 | should simply honor that. (The code that generates static | |
996 | initializers may also need to set the scope, in order to check | |
997 | access control correctly when emitting the initializers.) | |
998 | ||
999 | Methodology | |
1000 | ----------- | |
1001 | ||
1002 | The parser is of the standard recursive-descent variety. Upcoming | |
1003 | tokens in the token stream are examined in order to determine which | |
1004 | production to use when parsing a non-terminal. Some C++ constructs | |
1005 | require arbitrary look ahead to disambiguate. For example, it is | |
1006 | impossible, in the general case, to tell whether a statement is an | |
1007 | expression or declaration without scanning the entire statement. | |
1008 | Therefore, the parser is capable of "parsing tentatively." When the | |
1009 | parser is not sure what construct comes next, it enters this mode. | |
1010 | Then, while we attempt to parse the construct, the parser queues up | |
1011 | error messages, rather than issuing them immediately, and saves the | |
1012 | tokens it consumes. If the construct is parsed successfully, the | |
1013 | parser "commits", i.e., it issues any queued error messages and | |
1014 | the tokens that were being preserved are permanently discarded. | |
1015 | If, however, the construct is not parsed successfully, the parser | |
1016 | rolls back its state completely so that it can resume parsing using | |
1017 | a different alternative. | |
1018 | ||
1019 | Future Improvements | |
1020 | ------------------- | |
1021 | ||
1022 | The performance of the parser could probably be improved | |
1023 | substantially. Some possible improvements include: | |
1024 | ||
1025 | - The expression parser recurses through the various levels of | |
1026 | precedence as specified in the grammar, rather than using an | |
1027 | operator-precedence technique. Therefore, parsing a simple | |
1028 | identifier requires multiple recursive calls. | |
1029 | ||
1030 | - We could often eliminate the need to parse tentatively by | |
1031 | looking ahead a little bit. In some places, this approach | |
1032 | might not entirely eliminate the need to parse tentatively, but | |
1033 | it might still speed up the average case. */ | |
1034 | ||
1035 | /* Flags that are passed to some parsing functions. These values can | |
1036 | be bitwise-ored together. */ | |
1037 | ||
1038 | typedef enum cp_parser_flags | |
1039 | { | |
1040 | /* No flags. */ | |
1041 | CP_PARSER_FLAGS_NONE = 0x0, | |
1042 | /* The construct is optional. If it is not present, then no error | |
1043 | should be issued. */ | |
1044 | CP_PARSER_FLAGS_OPTIONAL = 0x1, | |
1045 | /* When parsing a type-specifier, do not allow user-defined types. */ | |
1046 | CP_PARSER_FLAGS_NO_USER_DEFINED_TYPES = 0x2 | |
1047 | } cp_parser_flags; | |
1048 | ||
62b8a44e NS |
1049 | /* The different kinds of declarators we want to parse. */ |
1050 | ||
1051 | typedef enum cp_parser_declarator_kind | |
1052 | { | |
9bcb9aae | 1053 | /* We want an abstract declartor. */ |
62b8a44e NS |
1054 | CP_PARSER_DECLARATOR_ABSTRACT, |
1055 | /* We want a named declarator. */ | |
1056 | CP_PARSER_DECLARATOR_NAMED, | |
712becab | 1057 | /* We don't mind, but the name must be an unqualified-id */ |
62b8a44e NS |
1058 | CP_PARSER_DECLARATOR_EITHER |
1059 | } cp_parser_declarator_kind; | |
1060 | ||
a723baf1 MM |
1061 | /* A mapping from a token type to a corresponding tree node type. */ |
1062 | ||
1063 | typedef struct cp_parser_token_tree_map_node | |
1064 | { | |
1065 | /* The token type. */ | |
522df488 | 1066 | enum cpp_ttype token_type : 8; |
a723baf1 | 1067 | /* The corresponding tree code. */ |
522df488 | 1068 | enum tree_code tree_type : 8; |
a723baf1 MM |
1069 | } cp_parser_token_tree_map_node; |
1070 | ||
1071 | /* A complete map consists of several ordinary entries, followed by a | |
1072 | terminator. The terminating entry has a token_type of CPP_EOF. */ | |
1073 | ||
1074 | typedef cp_parser_token_tree_map_node cp_parser_token_tree_map[]; | |
1075 | ||
1076 | /* The status of a tentative parse. */ | |
1077 | ||
1078 | typedef enum cp_parser_status_kind | |
1079 | { | |
1080 | /* No errors have occurred. */ | |
1081 | CP_PARSER_STATUS_KIND_NO_ERROR, | |
1082 | /* An error has occurred. */ | |
1083 | CP_PARSER_STATUS_KIND_ERROR, | |
1084 | /* We are committed to this tentative parse, whether or not an error | |
1085 | has occurred. */ | |
1086 | CP_PARSER_STATUS_KIND_COMMITTED | |
1087 | } cp_parser_status_kind; | |
1088 | ||
1089 | /* Context that is saved and restored when parsing tentatively. */ | |
1090 | ||
1091 | typedef struct cp_parser_context GTY (()) | |
1092 | { | |
1093 | /* If this is a tentative parsing context, the status of the | |
1094 | tentative parse. */ | |
1095 | enum cp_parser_status_kind status; | |
1096 | /* If non-NULL, we have just seen a `x->' or `x.' expression. Names | |
1097 | that are looked up in this context must be looked up both in the | |
1098 | scope given by OBJECT_TYPE (the type of `x' or `*x') and also in | |
1099 | the context of the containing expression. */ | |
1100 | tree object_type; | |
a723baf1 MM |
1101 | /* The next parsing context in the stack. */ |
1102 | struct cp_parser_context *next; | |
1103 | } cp_parser_context; | |
1104 | ||
1105 | /* Prototypes. */ | |
1106 | ||
1107 | /* Constructors and destructors. */ | |
1108 | ||
1109 | static cp_parser_context *cp_parser_context_new | |
94edc4ab | 1110 | (cp_parser_context *); |
a723baf1 | 1111 | |
e5976695 MM |
1112 | /* Class variables. */ |
1113 | ||
92bc1323 | 1114 | static GTY((deletable (""))) cp_parser_context* cp_parser_context_free_list; |
e5976695 | 1115 | |
a723baf1 MM |
1116 | /* Constructors and destructors. */ |
1117 | ||
1118 | /* Construct a new context. The context below this one on the stack | |
1119 | is given by NEXT. */ | |
1120 | ||
1121 | static cp_parser_context * | |
94edc4ab | 1122 | cp_parser_context_new (cp_parser_context* next) |
a723baf1 MM |
1123 | { |
1124 | cp_parser_context *context; | |
1125 | ||
1126 | /* Allocate the storage. */ | |
e5976695 MM |
1127 | if (cp_parser_context_free_list != NULL) |
1128 | { | |
1129 | /* Pull the first entry from the free list. */ | |
1130 | context = cp_parser_context_free_list; | |
1131 | cp_parser_context_free_list = context->next; | |
c68b0a84 | 1132 | memset (context, 0, sizeof (*context)); |
e5976695 MM |
1133 | } |
1134 | else | |
c68b0a84 | 1135 | context = ggc_alloc_cleared (sizeof (cp_parser_context)); |
a723baf1 MM |
1136 | /* No errors have occurred yet in this context. */ |
1137 | context->status = CP_PARSER_STATUS_KIND_NO_ERROR; | |
1138 | /* If this is not the bottomost context, copy information that we | |
1139 | need from the previous context. */ | |
1140 | if (next) | |
1141 | { | |
1142 | /* If, in the NEXT context, we are parsing an `x->' or `x.' | |
1143 | expression, then we are parsing one in this context, too. */ | |
1144 | context->object_type = next->object_type; | |
a723baf1 MM |
1145 | /* Thread the stack. */ |
1146 | context->next = next; | |
1147 | } | |
1148 | ||
1149 | return context; | |
1150 | } | |
1151 | ||
1152 | /* The cp_parser structure represents the C++ parser. */ | |
1153 | ||
1154 | typedef struct cp_parser GTY(()) | |
1155 | { | |
1156 | /* The lexer from which we are obtaining tokens. */ | |
1157 | cp_lexer *lexer; | |
1158 | ||
1159 | /* The scope in which names should be looked up. If NULL_TREE, then | |
1160 | we look up names in the scope that is currently open in the | |
1161 | source program. If non-NULL, this is either a TYPE or | |
1162 | NAMESPACE_DECL for the scope in which we should look. | |
1163 | ||
1164 | This value is not cleared automatically after a name is looked | |
1165 | up, so we must be careful to clear it before starting a new look | |
1166 | up sequence. (If it is not cleared, then `X::Y' followed by `Z' | |
1167 | will look up `Z' in the scope of `X', rather than the current | |
1168 | scope.) Unfortunately, it is difficult to tell when name lookup | |
1169 | is complete, because we sometimes peek at a token, look it up, | |
1170 | and then decide not to consume it. */ | |
1171 | tree scope; | |
1172 | ||
1173 | /* OBJECT_SCOPE and QUALIFYING_SCOPE give the scopes in which the | |
1174 | last lookup took place. OBJECT_SCOPE is used if an expression | |
1175 | like "x->y" or "x.y" was used; it gives the type of "*x" or "x", | |
1176 | respectively. QUALIFYING_SCOPE is used for an expression of the | |
1177 | form "X::Y"; it refers to X. */ | |
1178 | tree object_scope; | |
1179 | tree qualifying_scope; | |
1180 | ||
1181 | /* A stack of parsing contexts. All but the bottom entry on the | |
1182 | stack will be tentative contexts. | |
1183 | ||
1184 | We parse tentatively in order to determine which construct is in | |
1185 | use in some situations. For example, in order to determine | |
1186 | whether a statement is an expression-statement or a | |
1187 | declaration-statement we parse it tentatively as a | |
1188 | declaration-statement. If that fails, we then reparse the same | |
1189 | token stream as an expression-statement. */ | |
1190 | cp_parser_context *context; | |
1191 | ||
1192 | /* True if we are parsing GNU C++. If this flag is not set, then | |
1193 | GNU extensions are not recognized. */ | |
1194 | bool allow_gnu_extensions_p; | |
1195 | ||
1196 | /* TRUE if the `>' token should be interpreted as the greater-than | |
1197 | operator. FALSE if it is the end of a template-id or | |
1198 | template-parameter-list. */ | |
1199 | bool greater_than_is_operator_p; | |
1200 | ||
1201 | /* TRUE if default arguments are allowed within a parameter list | |
1202 | that starts at this point. FALSE if only a gnu extension makes | |
1203 | them permissable. */ | |
1204 | bool default_arg_ok_p; | |
1205 | ||
1206 | /* TRUE if we are parsing an integral constant-expression. See | |
1207 | [expr.const] for a precise definition. */ | |
a723baf1 MM |
1208 | bool constant_expression_p; |
1209 | ||
14d22dd6 MM |
1210 | /* TRUE if we are parsing an integral constant-expression -- but a |
1211 | non-constant expression should be permitted as well. This flag | |
1212 | is used when parsing an array bound so that GNU variable-length | |
1213 | arrays are tolerated. */ | |
1214 | bool allow_non_constant_expression_p; | |
1215 | ||
1216 | /* TRUE if ALLOW_NON_CONSTANT_EXPRESSION_P is TRUE and something has | |
1217 | been seen that makes the expression non-constant. */ | |
1218 | bool non_constant_expression_p; | |
1219 | ||
a723baf1 MM |
1220 | /* TRUE if local variable names and `this' are forbidden in the |
1221 | current context. */ | |
1222 | bool local_variables_forbidden_p; | |
1223 | ||
1224 | /* TRUE if the declaration we are parsing is part of a | |
1225 | linkage-specification of the form `extern string-literal | |
1226 | declaration'. */ | |
1227 | bool in_unbraced_linkage_specification_p; | |
1228 | ||
1229 | /* TRUE if we are presently parsing a declarator, after the | |
1230 | direct-declarator. */ | |
1231 | bool in_declarator_p; | |
1232 | ||
1233 | /* If non-NULL, then we are parsing a construct where new type | |
1234 | definitions are not permitted. The string stored here will be | |
1235 | issued as an error message if a type is defined. */ | |
1236 | const char *type_definition_forbidden_message; | |
1237 | ||
8db1028e NS |
1238 | /* A list of lists. The outer list is a stack, used for member |
1239 | functions of local classes. At each level there are two sub-list, | |
1240 | one on TREE_VALUE and one on TREE_PURPOSE. Each of those | |
1241 | sub-lists has a FUNCTION_DECL or TEMPLATE_DECL on their | |
1242 | TREE_VALUE's. The functions are chained in reverse declaration | |
1243 | order. | |
1244 | ||
1245 | The TREE_PURPOSE sublist contains those functions with default | |
1246 | arguments that need post processing, and the TREE_VALUE sublist | |
1247 | contains those functions with definitions that need post | |
1248 | processing. | |
1249 | ||
1250 | These lists can only be processed once the outermost class being | |
9bcb9aae | 1251 | defined is complete. */ |
a723baf1 MM |
1252 | tree unparsed_functions_queues; |
1253 | ||
1254 | /* The number of classes whose definitions are currently in | |
1255 | progress. */ | |
1256 | unsigned num_classes_being_defined; | |
1257 | ||
1258 | /* The number of template parameter lists that apply directly to the | |
1259 | current declaration. */ | |
1260 | unsigned num_template_parameter_lists; | |
1261 | } cp_parser; | |
1262 | ||
1263 | /* The type of a function that parses some kind of expression */ | |
94edc4ab | 1264 | typedef tree (*cp_parser_expression_fn) (cp_parser *); |
a723baf1 MM |
1265 | |
1266 | /* Prototypes. */ | |
1267 | ||
1268 | /* Constructors and destructors. */ | |
1269 | ||
1270 | static cp_parser *cp_parser_new | |
94edc4ab | 1271 | (void); |
a723baf1 MM |
1272 | |
1273 | /* Routines to parse various constructs. | |
1274 | ||
1275 | Those that return `tree' will return the error_mark_node (rather | |
1276 | than NULL_TREE) if a parse error occurs, unless otherwise noted. | |
1277 | Sometimes, they will return an ordinary node if error-recovery was | |
34cd5ae7 | 1278 | attempted, even though a parse error occurred. So, to check |
a723baf1 MM |
1279 | whether or not a parse error occurred, you should always use |
1280 | cp_parser_error_occurred. If the construct is optional (indicated | |
1281 | either by an `_opt' in the name of the function that does the | |
1282 | parsing or via a FLAGS parameter), then NULL_TREE is returned if | |
1283 | the construct is not present. */ | |
1284 | ||
1285 | /* Lexical conventions [gram.lex] */ | |
1286 | ||
1287 | static tree cp_parser_identifier | |
94edc4ab | 1288 | (cp_parser *); |
a723baf1 MM |
1289 | |
1290 | /* Basic concepts [gram.basic] */ | |
1291 | ||
1292 | static bool cp_parser_translation_unit | |
94edc4ab | 1293 | (cp_parser *); |
a723baf1 MM |
1294 | |
1295 | /* Expressions [gram.expr] */ | |
1296 | ||
1297 | static tree cp_parser_primary_expression | |
b3445994 | 1298 | (cp_parser *, cp_id_kind *, tree *); |
a723baf1 | 1299 | static tree cp_parser_id_expression |
f3c2dfc6 | 1300 | (cp_parser *, bool, bool, bool *, bool); |
a723baf1 | 1301 | static tree cp_parser_unqualified_id |
f3c2dfc6 | 1302 | (cp_parser *, bool, bool, bool); |
a723baf1 MM |
1303 | static tree cp_parser_nested_name_specifier_opt |
1304 | (cp_parser *, bool, bool, bool); | |
1305 | static tree cp_parser_nested_name_specifier | |
1306 | (cp_parser *, bool, bool, bool); | |
1307 | static tree cp_parser_class_or_namespace_name | |
1308 | (cp_parser *, bool, bool, bool, bool); | |
1309 | static tree cp_parser_postfix_expression | |
1310 | (cp_parser *, bool); | |
7efa3e22 | 1311 | static tree cp_parser_parenthesized_expression_list |
39703eb9 | 1312 | (cp_parser *, bool, bool *); |
a723baf1 | 1313 | static void cp_parser_pseudo_destructor_name |
94edc4ab | 1314 | (cp_parser *, tree *, tree *); |
a723baf1 MM |
1315 | static tree cp_parser_unary_expression |
1316 | (cp_parser *, bool); | |
1317 | static enum tree_code cp_parser_unary_operator | |
94edc4ab | 1318 | (cp_token *); |
a723baf1 | 1319 | static tree cp_parser_new_expression |
94edc4ab | 1320 | (cp_parser *); |
a723baf1 | 1321 | static tree cp_parser_new_placement |
94edc4ab | 1322 | (cp_parser *); |
a723baf1 | 1323 | static tree cp_parser_new_type_id |
94edc4ab | 1324 | (cp_parser *); |
a723baf1 | 1325 | static tree cp_parser_new_declarator_opt |
94edc4ab | 1326 | (cp_parser *); |
a723baf1 | 1327 | static tree cp_parser_direct_new_declarator |
94edc4ab | 1328 | (cp_parser *); |
a723baf1 | 1329 | static tree cp_parser_new_initializer |
94edc4ab | 1330 | (cp_parser *); |
a723baf1 | 1331 | static tree cp_parser_delete_expression |
94edc4ab | 1332 | (cp_parser *); |
a723baf1 MM |
1333 | static tree cp_parser_cast_expression |
1334 | (cp_parser *, bool); | |
1335 | static tree cp_parser_pm_expression | |
94edc4ab | 1336 | (cp_parser *); |
a723baf1 | 1337 | static tree cp_parser_multiplicative_expression |
94edc4ab | 1338 | (cp_parser *); |
a723baf1 | 1339 | static tree cp_parser_additive_expression |
94edc4ab | 1340 | (cp_parser *); |
a723baf1 | 1341 | static tree cp_parser_shift_expression |
94edc4ab | 1342 | (cp_parser *); |
a723baf1 | 1343 | static tree cp_parser_relational_expression |
94edc4ab | 1344 | (cp_parser *); |
a723baf1 | 1345 | static tree cp_parser_equality_expression |
94edc4ab | 1346 | (cp_parser *); |
a723baf1 | 1347 | static tree cp_parser_and_expression |
94edc4ab | 1348 | (cp_parser *); |
a723baf1 | 1349 | static tree cp_parser_exclusive_or_expression |
94edc4ab | 1350 | (cp_parser *); |
a723baf1 | 1351 | static tree cp_parser_inclusive_or_expression |
94edc4ab | 1352 | (cp_parser *); |
a723baf1 | 1353 | static tree cp_parser_logical_and_expression |
94edc4ab | 1354 | (cp_parser *); |
a723baf1 | 1355 | static tree cp_parser_logical_or_expression |
94edc4ab | 1356 | (cp_parser *); |
a723baf1 | 1357 | static tree cp_parser_question_colon_clause |
94edc4ab | 1358 | (cp_parser *, tree); |
a723baf1 | 1359 | static tree cp_parser_assignment_expression |
94edc4ab | 1360 | (cp_parser *); |
a723baf1 | 1361 | static enum tree_code cp_parser_assignment_operator_opt |
94edc4ab | 1362 | (cp_parser *); |
a723baf1 | 1363 | static tree cp_parser_expression |
94edc4ab | 1364 | (cp_parser *); |
a723baf1 | 1365 | static tree cp_parser_constant_expression |
14d22dd6 | 1366 | (cp_parser *, bool, bool *); |
a723baf1 MM |
1367 | |
1368 | /* Statements [gram.stmt.stmt] */ | |
1369 | ||
1370 | static void cp_parser_statement | |
a5bcc582 | 1371 | (cp_parser *, bool); |
a723baf1 | 1372 | static tree cp_parser_labeled_statement |
a5bcc582 | 1373 | (cp_parser *, bool); |
a723baf1 | 1374 | static tree cp_parser_expression_statement |
a5bcc582 | 1375 | (cp_parser *, bool); |
a723baf1 | 1376 | static tree cp_parser_compound_statement |
a5bcc582 | 1377 | (cp_parser *, bool); |
a723baf1 | 1378 | static void cp_parser_statement_seq_opt |
a5bcc582 | 1379 | (cp_parser *, bool); |
a723baf1 | 1380 | static tree cp_parser_selection_statement |
94edc4ab | 1381 | (cp_parser *); |
a723baf1 | 1382 | static tree cp_parser_condition |
94edc4ab | 1383 | (cp_parser *); |
a723baf1 | 1384 | static tree cp_parser_iteration_statement |
94edc4ab | 1385 | (cp_parser *); |
a723baf1 | 1386 | static void cp_parser_for_init_statement |
94edc4ab | 1387 | (cp_parser *); |
a723baf1 | 1388 | static tree cp_parser_jump_statement |
94edc4ab | 1389 | (cp_parser *); |
a723baf1 | 1390 | static void cp_parser_declaration_statement |
94edc4ab | 1391 | (cp_parser *); |
a723baf1 MM |
1392 | |
1393 | static tree cp_parser_implicitly_scoped_statement | |
94edc4ab | 1394 | (cp_parser *); |
a723baf1 | 1395 | static void cp_parser_already_scoped_statement |
94edc4ab | 1396 | (cp_parser *); |
a723baf1 MM |
1397 | |
1398 | /* Declarations [gram.dcl.dcl] */ | |
1399 | ||
1400 | static void cp_parser_declaration_seq_opt | |
94edc4ab | 1401 | (cp_parser *); |
a723baf1 | 1402 | static void cp_parser_declaration |
94edc4ab | 1403 | (cp_parser *); |
a723baf1 | 1404 | static void cp_parser_block_declaration |
94edc4ab | 1405 | (cp_parser *, bool); |
a723baf1 | 1406 | static void cp_parser_simple_declaration |
94edc4ab | 1407 | (cp_parser *, bool); |
a723baf1 | 1408 | static tree cp_parser_decl_specifier_seq |
560ad596 | 1409 | (cp_parser *, cp_parser_flags, tree *, int *); |
a723baf1 | 1410 | static tree cp_parser_storage_class_specifier_opt |
94edc4ab | 1411 | (cp_parser *); |
a723baf1 | 1412 | static tree cp_parser_function_specifier_opt |
94edc4ab | 1413 | (cp_parser *); |
a723baf1 | 1414 | static tree cp_parser_type_specifier |
560ad596 | 1415 | (cp_parser *, cp_parser_flags, bool, bool, int *, bool *); |
a723baf1 | 1416 | static tree cp_parser_simple_type_specifier |
4b0d3cbe | 1417 | (cp_parser *, cp_parser_flags, bool); |
a723baf1 | 1418 | static tree cp_parser_type_name |
94edc4ab | 1419 | (cp_parser *); |
a723baf1 | 1420 | static tree cp_parser_elaborated_type_specifier |
94edc4ab | 1421 | (cp_parser *, bool, bool); |
a723baf1 | 1422 | static tree cp_parser_enum_specifier |
94edc4ab | 1423 | (cp_parser *); |
a723baf1 | 1424 | static void cp_parser_enumerator_list |
94edc4ab | 1425 | (cp_parser *, tree); |
a723baf1 | 1426 | static void cp_parser_enumerator_definition |
94edc4ab | 1427 | (cp_parser *, tree); |
a723baf1 | 1428 | static tree cp_parser_namespace_name |
94edc4ab | 1429 | (cp_parser *); |
a723baf1 | 1430 | static void cp_parser_namespace_definition |
94edc4ab | 1431 | (cp_parser *); |
a723baf1 | 1432 | static void cp_parser_namespace_body |
94edc4ab | 1433 | (cp_parser *); |
a723baf1 | 1434 | static tree cp_parser_qualified_namespace_specifier |
94edc4ab | 1435 | (cp_parser *); |
a723baf1 | 1436 | static void cp_parser_namespace_alias_definition |
94edc4ab | 1437 | (cp_parser *); |
a723baf1 | 1438 | static void cp_parser_using_declaration |
94edc4ab | 1439 | (cp_parser *); |
a723baf1 | 1440 | static void cp_parser_using_directive |
94edc4ab | 1441 | (cp_parser *); |
a723baf1 | 1442 | static void cp_parser_asm_definition |
94edc4ab | 1443 | (cp_parser *); |
a723baf1 | 1444 | static void cp_parser_linkage_specification |
94edc4ab | 1445 | (cp_parser *); |
a723baf1 MM |
1446 | |
1447 | /* Declarators [gram.dcl.decl] */ | |
1448 | ||
1449 | static tree cp_parser_init_declarator | |
560ad596 | 1450 | (cp_parser *, tree, tree, bool, bool, int, bool *); |
a723baf1 | 1451 | static tree cp_parser_declarator |
7efa3e22 | 1452 | (cp_parser *, cp_parser_declarator_kind, int *); |
a723baf1 | 1453 | static tree cp_parser_direct_declarator |
7efa3e22 | 1454 | (cp_parser *, cp_parser_declarator_kind, int *); |
a723baf1 | 1455 | static enum tree_code cp_parser_ptr_operator |
94edc4ab | 1456 | (cp_parser *, tree *, tree *); |
a723baf1 | 1457 | static tree cp_parser_cv_qualifier_seq_opt |
94edc4ab | 1458 | (cp_parser *); |
a723baf1 | 1459 | static tree cp_parser_cv_qualifier_opt |
94edc4ab | 1460 | (cp_parser *); |
a723baf1 | 1461 | static tree cp_parser_declarator_id |
94edc4ab | 1462 | (cp_parser *); |
a723baf1 | 1463 | static tree cp_parser_type_id |
94edc4ab | 1464 | (cp_parser *); |
a723baf1 | 1465 | static tree cp_parser_type_specifier_seq |
94edc4ab | 1466 | (cp_parser *); |
a723baf1 | 1467 | static tree cp_parser_parameter_declaration_clause |
94edc4ab | 1468 | (cp_parser *); |
a723baf1 | 1469 | static tree cp_parser_parameter_declaration_list |
94edc4ab | 1470 | (cp_parser *); |
a723baf1 | 1471 | static tree cp_parser_parameter_declaration |
94edc4ab | 1472 | (cp_parser *, bool); |
a723baf1 | 1473 | static tree cp_parser_function_definition |
94edc4ab | 1474 | (cp_parser *, bool *); |
a723baf1 MM |
1475 | static void cp_parser_function_body |
1476 | (cp_parser *); | |
1477 | static tree cp_parser_initializer | |
39703eb9 | 1478 | (cp_parser *, bool *, bool *); |
a723baf1 | 1479 | static tree cp_parser_initializer_clause |
39703eb9 | 1480 | (cp_parser *, bool *); |
a723baf1 | 1481 | static tree cp_parser_initializer_list |
39703eb9 | 1482 | (cp_parser *, bool *); |
a723baf1 MM |
1483 | |
1484 | static bool cp_parser_ctor_initializer_opt_and_function_body | |
1485 | (cp_parser *); | |
1486 | ||
1487 | /* Classes [gram.class] */ | |
1488 | ||
1489 | static tree cp_parser_class_name | |
8d241e0b | 1490 | (cp_parser *, bool, bool, bool, bool, bool); |
a723baf1 | 1491 | static tree cp_parser_class_specifier |
94edc4ab | 1492 | (cp_parser *); |
a723baf1 | 1493 | static tree cp_parser_class_head |
94edc4ab | 1494 | (cp_parser *, bool *); |
a723baf1 | 1495 | static enum tag_types cp_parser_class_key |
94edc4ab | 1496 | (cp_parser *); |
a723baf1 | 1497 | static void cp_parser_member_specification_opt |
94edc4ab | 1498 | (cp_parser *); |
a723baf1 | 1499 | static void cp_parser_member_declaration |
94edc4ab | 1500 | (cp_parser *); |
a723baf1 | 1501 | static tree cp_parser_pure_specifier |
94edc4ab | 1502 | (cp_parser *); |
a723baf1 | 1503 | static tree cp_parser_constant_initializer |
94edc4ab | 1504 | (cp_parser *); |
a723baf1 MM |
1505 | |
1506 | /* Derived classes [gram.class.derived] */ | |
1507 | ||
1508 | static tree cp_parser_base_clause | |
94edc4ab | 1509 | (cp_parser *); |
a723baf1 | 1510 | static tree cp_parser_base_specifier |
94edc4ab | 1511 | (cp_parser *); |
a723baf1 MM |
1512 | |
1513 | /* Special member functions [gram.special] */ | |
1514 | ||
1515 | static tree cp_parser_conversion_function_id | |
94edc4ab | 1516 | (cp_parser *); |
a723baf1 | 1517 | static tree cp_parser_conversion_type_id |
94edc4ab | 1518 | (cp_parser *); |
a723baf1 | 1519 | static tree cp_parser_conversion_declarator_opt |
94edc4ab | 1520 | (cp_parser *); |
a723baf1 | 1521 | static bool cp_parser_ctor_initializer_opt |
94edc4ab | 1522 | (cp_parser *); |
a723baf1 | 1523 | static void cp_parser_mem_initializer_list |
94edc4ab | 1524 | (cp_parser *); |
a723baf1 | 1525 | static tree cp_parser_mem_initializer |
94edc4ab | 1526 | (cp_parser *); |
a723baf1 | 1527 | static tree cp_parser_mem_initializer_id |
94edc4ab | 1528 | (cp_parser *); |
a723baf1 MM |
1529 | |
1530 | /* Overloading [gram.over] */ | |
1531 | ||
1532 | static tree cp_parser_operator_function_id | |
94edc4ab | 1533 | (cp_parser *); |
a723baf1 | 1534 | static tree cp_parser_operator |
94edc4ab | 1535 | (cp_parser *); |
a723baf1 MM |
1536 | |
1537 | /* Templates [gram.temp] */ | |
1538 | ||
1539 | static void cp_parser_template_declaration | |
94edc4ab | 1540 | (cp_parser *, bool); |
a723baf1 | 1541 | static tree cp_parser_template_parameter_list |
94edc4ab | 1542 | (cp_parser *); |
a723baf1 | 1543 | static tree cp_parser_template_parameter |
94edc4ab | 1544 | (cp_parser *); |
a723baf1 | 1545 | static tree cp_parser_type_parameter |
94edc4ab | 1546 | (cp_parser *); |
a723baf1 | 1547 | static tree cp_parser_template_id |
94edc4ab | 1548 | (cp_parser *, bool, bool); |
a723baf1 | 1549 | static tree cp_parser_template_name |
94edc4ab | 1550 | (cp_parser *, bool, bool); |
a723baf1 | 1551 | static tree cp_parser_template_argument_list |
94edc4ab | 1552 | (cp_parser *); |
a723baf1 | 1553 | static tree cp_parser_template_argument |
94edc4ab | 1554 | (cp_parser *); |
a723baf1 | 1555 | static void cp_parser_explicit_instantiation |
94edc4ab | 1556 | (cp_parser *); |
a723baf1 | 1557 | static void cp_parser_explicit_specialization |
94edc4ab | 1558 | (cp_parser *); |
a723baf1 MM |
1559 | |
1560 | /* Exception handling [gram.exception] */ | |
1561 | ||
1562 | static tree cp_parser_try_block | |
94edc4ab | 1563 | (cp_parser *); |
a723baf1 | 1564 | static bool cp_parser_function_try_block |
94edc4ab | 1565 | (cp_parser *); |
a723baf1 | 1566 | static void cp_parser_handler_seq |
94edc4ab | 1567 | (cp_parser *); |
a723baf1 | 1568 | static void cp_parser_handler |
94edc4ab | 1569 | (cp_parser *); |
a723baf1 | 1570 | static tree cp_parser_exception_declaration |
94edc4ab | 1571 | (cp_parser *); |
a723baf1 | 1572 | static tree cp_parser_throw_expression |
94edc4ab | 1573 | (cp_parser *); |
a723baf1 | 1574 | static tree cp_parser_exception_specification_opt |
94edc4ab | 1575 | (cp_parser *); |
a723baf1 | 1576 | static tree cp_parser_type_id_list |
94edc4ab | 1577 | (cp_parser *); |
a723baf1 MM |
1578 | |
1579 | /* GNU Extensions */ | |
1580 | ||
1581 | static tree cp_parser_asm_specification_opt | |
94edc4ab | 1582 | (cp_parser *); |
a723baf1 | 1583 | static tree cp_parser_asm_operand_list |
94edc4ab | 1584 | (cp_parser *); |
a723baf1 | 1585 | static tree cp_parser_asm_clobber_list |
94edc4ab | 1586 | (cp_parser *); |
a723baf1 | 1587 | static tree cp_parser_attributes_opt |
94edc4ab | 1588 | (cp_parser *); |
a723baf1 | 1589 | static tree cp_parser_attribute_list |
94edc4ab | 1590 | (cp_parser *); |
a723baf1 | 1591 | static bool cp_parser_extension_opt |
94edc4ab | 1592 | (cp_parser *, int *); |
a723baf1 | 1593 | static void cp_parser_label_declaration |
94edc4ab | 1594 | (cp_parser *); |
a723baf1 MM |
1595 | |
1596 | /* Utility Routines */ | |
1597 | ||
1598 | static tree cp_parser_lookup_name | |
8d241e0b | 1599 | (cp_parser *, tree, bool, bool, bool); |
a723baf1 | 1600 | static tree cp_parser_lookup_name_simple |
94edc4ab | 1601 | (cp_parser *, tree); |
a723baf1 MM |
1602 | static tree cp_parser_maybe_treat_template_as_class |
1603 | (tree, bool); | |
1604 | static bool cp_parser_check_declarator_template_parameters | |
94edc4ab | 1605 | (cp_parser *, tree); |
a723baf1 | 1606 | static bool cp_parser_check_template_parameters |
94edc4ab | 1607 | (cp_parser *, unsigned); |
d6b4ea85 MM |
1608 | static tree cp_parser_simple_cast_expression |
1609 | (cp_parser *); | |
a723baf1 | 1610 | static tree cp_parser_binary_expression |
94edc4ab | 1611 | (cp_parser *, const cp_parser_token_tree_map, cp_parser_expression_fn); |
a723baf1 | 1612 | static tree cp_parser_global_scope_opt |
94edc4ab | 1613 | (cp_parser *, bool); |
a723baf1 MM |
1614 | static bool cp_parser_constructor_declarator_p |
1615 | (cp_parser *, bool); | |
1616 | static tree cp_parser_function_definition_from_specifiers_and_declarator | |
94edc4ab | 1617 | (cp_parser *, tree, tree, tree); |
a723baf1 | 1618 | static tree cp_parser_function_definition_after_declarator |
94edc4ab | 1619 | (cp_parser *, bool); |
a723baf1 | 1620 | static void cp_parser_template_declaration_after_export |
94edc4ab | 1621 | (cp_parser *, bool); |
a723baf1 | 1622 | static tree cp_parser_single_declaration |
94edc4ab | 1623 | (cp_parser *, bool, bool *); |
a723baf1 | 1624 | static tree cp_parser_functional_cast |
94edc4ab | 1625 | (cp_parser *, tree); |
8db1028e NS |
1626 | static void cp_parser_save_default_args |
1627 | (cp_parser *, tree); | |
a723baf1 | 1628 | static void cp_parser_late_parsing_for_member |
94edc4ab | 1629 | (cp_parser *, tree); |
a723baf1 | 1630 | static void cp_parser_late_parsing_default_args |
8218bd34 | 1631 | (cp_parser *, tree); |
a723baf1 | 1632 | static tree cp_parser_sizeof_operand |
94edc4ab | 1633 | (cp_parser *, enum rid); |
a723baf1 | 1634 | static bool cp_parser_declares_only_class_p |
94edc4ab | 1635 | (cp_parser *); |
d17811fd MM |
1636 | static tree cp_parser_fold_non_dependent_expr |
1637 | (tree); | |
a723baf1 | 1638 | static bool cp_parser_friend_p |
94edc4ab | 1639 | (tree); |
a723baf1 | 1640 | static cp_token *cp_parser_require |
94edc4ab | 1641 | (cp_parser *, enum cpp_ttype, const char *); |
a723baf1 | 1642 | static cp_token *cp_parser_require_keyword |
94edc4ab | 1643 | (cp_parser *, enum rid, const char *); |
a723baf1 | 1644 | static bool cp_parser_token_starts_function_definition_p |
94edc4ab | 1645 | (cp_token *); |
a723baf1 MM |
1646 | static bool cp_parser_next_token_starts_class_definition_p |
1647 | (cp_parser *); | |
d17811fd MM |
1648 | static bool cp_parser_next_token_ends_template_argument_p |
1649 | (cp_parser *); | |
a723baf1 | 1650 | static enum tag_types cp_parser_token_is_class_key |
94edc4ab | 1651 | (cp_token *); |
a723baf1 MM |
1652 | static void cp_parser_check_class_key |
1653 | (enum tag_types, tree type); | |
1654 | static bool cp_parser_optional_template_keyword | |
1655 | (cp_parser *); | |
2050a1bb MM |
1656 | static void cp_parser_pre_parsed_nested_name_specifier |
1657 | (cp_parser *); | |
a723baf1 MM |
1658 | static void cp_parser_cache_group |
1659 | (cp_parser *, cp_token_cache *, enum cpp_ttype, unsigned); | |
1660 | static void cp_parser_parse_tentatively | |
94edc4ab | 1661 | (cp_parser *); |
a723baf1 | 1662 | static void cp_parser_commit_to_tentative_parse |
94edc4ab | 1663 | (cp_parser *); |
a723baf1 | 1664 | static void cp_parser_abort_tentative_parse |
94edc4ab | 1665 | (cp_parser *); |
a723baf1 | 1666 | static bool cp_parser_parse_definitely |
94edc4ab | 1667 | (cp_parser *); |
f7b5ecd9 | 1668 | static inline bool cp_parser_parsing_tentatively |
94edc4ab | 1669 | (cp_parser *); |
a723baf1 | 1670 | static bool cp_parser_committed_to_tentative_parse |
94edc4ab | 1671 | (cp_parser *); |
a723baf1 | 1672 | static void cp_parser_error |
94edc4ab | 1673 | (cp_parser *, const char *); |
e5976695 | 1674 | static bool cp_parser_simulate_error |
94edc4ab | 1675 | (cp_parser *); |
a723baf1 | 1676 | static void cp_parser_check_type_definition |
94edc4ab | 1677 | (cp_parser *); |
560ad596 MM |
1678 | static void cp_parser_check_for_definition_in_return_type |
1679 | (tree, int); | |
14d22dd6 MM |
1680 | static tree cp_parser_non_constant_expression |
1681 | (const char *); | |
8fbc5ae7 MM |
1682 | static bool cp_parser_diagnose_invalid_type_name |
1683 | (cp_parser *); | |
7efa3e22 NS |
1684 | static int cp_parser_skip_to_closing_parenthesis |
1685 | (cp_parser *, bool, bool); | |
a723baf1 | 1686 | static void cp_parser_skip_to_end_of_statement |
94edc4ab | 1687 | (cp_parser *); |
e0860732 MM |
1688 | static void cp_parser_consume_semicolon_at_end_of_statement |
1689 | (cp_parser *); | |
a723baf1 | 1690 | static void cp_parser_skip_to_end_of_block_or_statement |
94edc4ab | 1691 | (cp_parser *); |
a723baf1 MM |
1692 | static void cp_parser_skip_to_closing_brace |
1693 | (cp_parser *); | |
1694 | static void cp_parser_skip_until_found | |
94edc4ab | 1695 | (cp_parser *, enum cpp_ttype, const char *); |
a723baf1 | 1696 | static bool cp_parser_error_occurred |
94edc4ab | 1697 | (cp_parser *); |
a723baf1 | 1698 | static bool cp_parser_allow_gnu_extensions_p |
94edc4ab | 1699 | (cp_parser *); |
a723baf1 | 1700 | static bool cp_parser_is_string_literal |
94edc4ab | 1701 | (cp_token *); |
a723baf1 | 1702 | static bool cp_parser_is_keyword |
94edc4ab | 1703 | (cp_token *, enum rid); |
a723baf1 | 1704 | |
4de8668e | 1705 | /* Returns nonzero if we are parsing tentatively. */ |
f7b5ecd9 MM |
1706 | |
1707 | static inline bool | |
94edc4ab | 1708 | cp_parser_parsing_tentatively (cp_parser* parser) |
f7b5ecd9 MM |
1709 | { |
1710 | return parser->context->next != NULL; | |
1711 | } | |
1712 | ||
4de8668e | 1713 | /* Returns nonzero if TOKEN is a string literal. */ |
a723baf1 MM |
1714 | |
1715 | static bool | |
94edc4ab | 1716 | cp_parser_is_string_literal (cp_token* token) |
a723baf1 MM |
1717 | { |
1718 | return (token->type == CPP_STRING || token->type == CPP_WSTRING); | |
1719 | } | |
1720 | ||
4de8668e | 1721 | /* Returns nonzero if TOKEN is the indicated KEYWORD. */ |
a723baf1 MM |
1722 | |
1723 | static bool | |
94edc4ab | 1724 | cp_parser_is_keyword (cp_token* token, enum rid keyword) |
a723baf1 MM |
1725 | { |
1726 | return token->keyword == keyword; | |
1727 | } | |
1728 | ||
a723baf1 MM |
1729 | /* Issue the indicated error MESSAGE. */ |
1730 | ||
1731 | static void | |
94edc4ab | 1732 | cp_parser_error (cp_parser* parser, const char* message) |
a723baf1 | 1733 | { |
a723baf1 | 1734 | /* Output the MESSAGE -- unless we're parsing tentatively. */ |
e5976695 | 1735 | if (!cp_parser_simulate_error (parser)) |
a723baf1 MM |
1736 | error (message); |
1737 | } | |
1738 | ||
1739 | /* If we are parsing tentatively, remember that an error has occurred | |
e5976695 MM |
1740 | during this tentative parse. Returns true if the error was |
1741 | simulated; false if a messgae should be issued by the caller. */ | |
a723baf1 | 1742 | |
e5976695 | 1743 | static bool |
94edc4ab | 1744 | cp_parser_simulate_error (cp_parser* parser) |
a723baf1 MM |
1745 | { |
1746 | if (cp_parser_parsing_tentatively (parser) | |
1747 | && !cp_parser_committed_to_tentative_parse (parser)) | |
e5976695 MM |
1748 | { |
1749 | parser->context->status = CP_PARSER_STATUS_KIND_ERROR; | |
1750 | return true; | |
1751 | } | |
1752 | return false; | |
a723baf1 MM |
1753 | } |
1754 | ||
1755 | /* This function is called when a type is defined. If type | |
1756 | definitions are forbidden at this point, an error message is | |
1757 | issued. */ | |
1758 | ||
1759 | static void | |
94edc4ab | 1760 | cp_parser_check_type_definition (cp_parser* parser) |
a723baf1 MM |
1761 | { |
1762 | /* If types are forbidden here, issue a message. */ | |
1763 | if (parser->type_definition_forbidden_message) | |
1764 | /* Use `%s' to print the string in case there are any escape | |
1765 | characters in the message. */ | |
1766 | error ("%s", parser->type_definition_forbidden_message); | |
1767 | } | |
1768 | ||
560ad596 MM |
1769 | /* This function is called when a declaration is parsed. If |
1770 | DECLARATOR is a function declarator and DECLARES_CLASS_OR_ENUM | |
1771 | indicates that a type was defined in the decl-specifiers for DECL, | |
1772 | then an error is issued. */ | |
1773 | ||
1774 | static void | |
1775 | cp_parser_check_for_definition_in_return_type (tree declarator, | |
1776 | int declares_class_or_enum) | |
1777 | { | |
1778 | /* [dcl.fct] forbids type definitions in return types. | |
1779 | Unfortunately, it's not easy to know whether or not we are | |
1780 | processing a return type until after the fact. */ | |
1781 | while (declarator | |
1782 | && (TREE_CODE (declarator) == INDIRECT_REF | |
1783 | || TREE_CODE (declarator) == ADDR_EXPR)) | |
1784 | declarator = TREE_OPERAND (declarator, 0); | |
1785 | if (declarator | |
1786 | && TREE_CODE (declarator) == CALL_EXPR | |
1787 | && declares_class_or_enum & 2) | |
1788 | error ("new types may not be defined in a return type"); | |
1789 | } | |
1790 | ||
14d22dd6 MM |
1791 | /* Issue an eror message about the fact that THING appeared in a |
1792 | constant-expression. Returns ERROR_MARK_NODE. */ | |
1793 | ||
1794 | static tree | |
1795 | cp_parser_non_constant_expression (const char *thing) | |
1796 | { | |
1797 | error ("%s cannot appear in a constant-expression", thing); | |
1798 | return error_mark_node; | |
1799 | } | |
1800 | ||
8fbc5ae7 MM |
1801 | /* Check for a common situation where a type-name should be present, |
1802 | but is not, and issue a sensible error message. Returns true if an | |
1803 | invalid type-name was detected. */ | |
1804 | ||
1805 | static bool | |
1806 | cp_parser_diagnose_invalid_type_name (cp_parser *parser) | |
1807 | { | |
1808 | /* If the next two tokens are both identifiers, the code is | |
1809 | erroneous. The usual cause of this situation is code like: | |
1810 | ||
1811 | T t; | |
1812 | ||
1813 | where "T" should name a type -- but does not. */ | |
1814 | if (cp_lexer_next_token_is (parser->lexer, CPP_NAME) | |
1815 | && cp_lexer_peek_nth_token (parser->lexer, 2)->type == CPP_NAME) | |
1816 | { | |
1817 | tree name; | |
1818 | ||
8d241e0b | 1819 | /* If parsing tentatively, we should commit; we really are |
8fbc5ae7 MM |
1820 | looking at a declaration. */ |
1821 | /* Consume the first identifier. */ | |
1822 | name = cp_lexer_consume_token (parser->lexer)->value; | |
1823 | /* Issue an error message. */ | |
1824 | error ("`%s' does not name a type", IDENTIFIER_POINTER (name)); | |
1825 | /* If we're in a template class, it's possible that the user was | |
1826 | referring to a type from a base class. For example: | |
1827 | ||
1828 | template <typename T> struct A { typedef T X; }; | |
1829 | template <typename T> struct B : public A<T> { X x; }; | |
1830 | ||
1831 | The user should have said "typename A<T>::X". */ | |
1832 | if (processing_template_decl && current_class_type) | |
1833 | { | |
1834 | tree b; | |
1835 | ||
1836 | for (b = TREE_CHAIN (TYPE_BINFO (current_class_type)); | |
1837 | b; | |
1838 | b = TREE_CHAIN (b)) | |
1839 | { | |
1840 | tree base_type = BINFO_TYPE (b); | |
1841 | if (CLASS_TYPE_P (base_type) | |
1fb3244a | 1842 | && dependent_type_p (base_type)) |
8fbc5ae7 MM |
1843 | { |
1844 | tree field; | |
1845 | /* Go from a particular instantiation of the | |
1846 | template (which will have an empty TYPE_FIELDs), | |
1847 | to the main version. */ | |
353b4fc0 | 1848 | base_type = CLASSTYPE_PRIMARY_TEMPLATE_TYPE (base_type); |
8fbc5ae7 MM |
1849 | for (field = TYPE_FIELDS (base_type); |
1850 | field; | |
1851 | field = TREE_CHAIN (field)) | |
1852 | if (TREE_CODE (field) == TYPE_DECL | |
1853 | && DECL_NAME (field) == name) | |
1854 | { | |
1855 | error ("(perhaps `typename %T::%s' was intended)", | |
1856 | BINFO_TYPE (b), IDENTIFIER_POINTER (name)); | |
1857 | break; | |
1858 | } | |
1859 | if (field) | |
1860 | break; | |
1861 | } | |
1862 | } | |
1863 | } | |
1864 | /* Skip to the end of the declaration; there's no point in | |
1865 | trying to process it. */ | |
1866 | cp_parser_skip_to_end_of_statement (parser); | |
1867 | ||
1868 | return true; | |
1869 | } | |
1870 | ||
1871 | return false; | |
1872 | } | |
1873 | ||
a723baf1 | 1874 | /* Consume tokens up to, and including, the next non-nested closing `)'. |
7efa3e22 NS |
1875 | Returns 1 iff we found a closing `)'. RECOVERING is true, if we |
1876 | are doing error recovery. Returns -1 if OR_COMMA is true and we | |
1877 | found an unnested comma. */ | |
a723baf1 | 1878 | |
7efa3e22 NS |
1879 | static int |
1880 | cp_parser_skip_to_closing_parenthesis (cp_parser *parser, | |
1881 | bool recovering, bool or_comma) | |
a723baf1 | 1882 | { |
7efa3e22 NS |
1883 | unsigned paren_depth = 0; |
1884 | unsigned brace_depth = 0; | |
a723baf1 | 1885 | |
7efa3e22 NS |
1886 | if (recovering && !or_comma && cp_parser_parsing_tentatively (parser) |
1887 | && !cp_parser_committed_to_tentative_parse (parser)) | |
1888 | return 0; | |
1889 | ||
a723baf1 MM |
1890 | while (true) |
1891 | { | |
1892 | cp_token *token; | |
7efa3e22 | 1893 | |
a723baf1 MM |
1894 | /* If we've run out of tokens, then there is no closing `)'. */ |
1895 | if (cp_lexer_next_token_is (parser->lexer, CPP_EOF)) | |
7efa3e22 | 1896 | return 0; |
a723baf1 | 1897 | |
7efa3e22 NS |
1898 | if (recovering) |
1899 | { | |
1900 | token = cp_lexer_peek_token (parser->lexer); | |
a723baf1 | 1901 | |
7efa3e22 NS |
1902 | /* This matches the processing in skip_to_end_of_statement */ |
1903 | if (token->type == CPP_SEMICOLON && !brace_depth) | |
1904 | return 0; | |
1905 | if (token->type == CPP_OPEN_BRACE) | |
1906 | ++brace_depth; | |
1907 | if (token->type == CPP_CLOSE_BRACE) | |
1908 | { | |
1909 | if (!brace_depth--) | |
1910 | return 0; | |
1911 | } | |
1912 | if (or_comma && token->type == CPP_COMMA | |
1913 | && !brace_depth && !paren_depth) | |
1914 | return -1; | |
1915 | } | |
1916 | ||
a723baf1 MM |
1917 | /* Consume the token. */ |
1918 | token = cp_lexer_consume_token (parser->lexer); | |
7efa3e22 NS |
1919 | |
1920 | if (!brace_depth) | |
1921 | { | |
1922 | /* If it is an `(', we have entered another level of nesting. */ | |
1923 | if (token->type == CPP_OPEN_PAREN) | |
1924 | ++paren_depth; | |
1925 | /* If it is a `)', then we might be done. */ | |
1926 | else if (token->type == CPP_CLOSE_PAREN && !paren_depth--) | |
1927 | return 1; | |
1928 | } | |
a723baf1 MM |
1929 | } |
1930 | } | |
1931 | ||
1932 | /* Consume tokens until we reach the end of the current statement. | |
1933 | Normally, that will be just before consuming a `;'. However, if a | |
1934 | non-nested `}' comes first, then we stop before consuming that. */ | |
1935 | ||
1936 | static void | |
94edc4ab | 1937 | cp_parser_skip_to_end_of_statement (cp_parser* parser) |
a723baf1 MM |
1938 | { |
1939 | unsigned nesting_depth = 0; | |
1940 | ||
1941 | while (true) | |
1942 | { | |
1943 | cp_token *token; | |
1944 | ||
1945 | /* Peek at the next token. */ | |
1946 | token = cp_lexer_peek_token (parser->lexer); | |
1947 | /* If we've run out of tokens, stop. */ | |
1948 | if (token->type == CPP_EOF) | |
1949 | break; | |
1950 | /* If the next token is a `;', we have reached the end of the | |
1951 | statement. */ | |
1952 | if (token->type == CPP_SEMICOLON && !nesting_depth) | |
1953 | break; | |
1954 | /* If the next token is a non-nested `}', then we have reached | |
1955 | the end of the current block. */ | |
1956 | if (token->type == CPP_CLOSE_BRACE) | |
1957 | { | |
1958 | /* If this is a non-nested `}', stop before consuming it. | |
1959 | That way, when confronted with something like: | |
1960 | ||
1961 | { 3 + } | |
1962 | ||
1963 | we stop before consuming the closing `}', even though we | |
1964 | have not yet reached a `;'. */ | |
1965 | if (nesting_depth == 0) | |
1966 | break; | |
1967 | /* If it is the closing `}' for a block that we have | |
1968 | scanned, stop -- but only after consuming the token. | |
1969 | That way given: | |
1970 | ||
1971 | void f g () { ... } | |
1972 | typedef int I; | |
1973 | ||
1974 | we will stop after the body of the erroneously declared | |
1975 | function, but before consuming the following `typedef' | |
1976 | declaration. */ | |
1977 | if (--nesting_depth == 0) | |
1978 | { | |
1979 | cp_lexer_consume_token (parser->lexer); | |
1980 | break; | |
1981 | } | |
1982 | } | |
1983 | /* If it the next token is a `{', then we are entering a new | |
1984 | block. Consume the entire block. */ | |
1985 | else if (token->type == CPP_OPEN_BRACE) | |
1986 | ++nesting_depth; | |
1987 | /* Consume the token. */ | |
1988 | cp_lexer_consume_token (parser->lexer); | |
1989 | } | |
1990 | } | |
1991 | ||
e0860732 MM |
1992 | /* This function is called at the end of a statement or declaration. |
1993 | If the next token is a semicolon, it is consumed; otherwise, error | |
1994 | recovery is attempted. */ | |
1995 | ||
1996 | static void | |
1997 | cp_parser_consume_semicolon_at_end_of_statement (cp_parser *parser) | |
1998 | { | |
1999 | /* Look for the trailing `;'. */ | |
2000 | if (!cp_parser_require (parser, CPP_SEMICOLON, "`;'")) | |
2001 | { | |
2002 | /* If there is additional (erroneous) input, skip to the end of | |
2003 | the statement. */ | |
2004 | cp_parser_skip_to_end_of_statement (parser); | |
2005 | /* If the next token is now a `;', consume it. */ | |
2006 | if (cp_lexer_next_token_is (parser->lexer, CPP_SEMICOLON)) | |
2007 | cp_lexer_consume_token (parser->lexer); | |
2008 | } | |
2009 | } | |
2010 | ||
a723baf1 MM |
2011 | /* Skip tokens until we have consumed an entire block, or until we |
2012 | have consumed a non-nested `;'. */ | |
2013 | ||
2014 | static void | |
94edc4ab | 2015 | cp_parser_skip_to_end_of_block_or_statement (cp_parser* parser) |
a723baf1 MM |
2016 | { |
2017 | unsigned nesting_depth = 0; | |
2018 | ||
2019 | while (true) | |
2020 | { | |
2021 | cp_token *token; | |
2022 | ||
2023 | /* Peek at the next token. */ | |
2024 | token = cp_lexer_peek_token (parser->lexer); | |
2025 | /* If we've run out of tokens, stop. */ | |
2026 | if (token->type == CPP_EOF) | |
2027 | break; | |
2028 | /* If the next token is a `;', we have reached the end of the | |
2029 | statement. */ | |
2030 | if (token->type == CPP_SEMICOLON && !nesting_depth) | |
2031 | { | |
2032 | /* Consume the `;'. */ | |
2033 | cp_lexer_consume_token (parser->lexer); | |
2034 | break; | |
2035 | } | |
2036 | /* Consume the token. */ | |
2037 | token = cp_lexer_consume_token (parser->lexer); | |
2038 | /* If the next token is a non-nested `}', then we have reached | |
2039 | the end of the current block. */ | |
2040 | if (token->type == CPP_CLOSE_BRACE | |
2041 | && (nesting_depth == 0 || --nesting_depth == 0)) | |
2042 | break; | |
2043 | /* If it the next token is a `{', then we are entering a new | |
2044 | block. Consume the entire block. */ | |
2045 | if (token->type == CPP_OPEN_BRACE) | |
2046 | ++nesting_depth; | |
2047 | } | |
2048 | } | |
2049 | ||
2050 | /* Skip tokens until a non-nested closing curly brace is the next | |
2051 | token. */ | |
2052 | ||
2053 | static void | |
2054 | cp_parser_skip_to_closing_brace (cp_parser *parser) | |
2055 | { | |
2056 | unsigned nesting_depth = 0; | |
2057 | ||
2058 | while (true) | |
2059 | { | |
2060 | cp_token *token; | |
2061 | ||
2062 | /* Peek at the next token. */ | |
2063 | token = cp_lexer_peek_token (parser->lexer); | |
2064 | /* If we've run out of tokens, stop. */ | |
2065 | if (token->type == CPP_EOF) | |
2066 | break; | |
2067 | /* If the next token is a non-nested `}', then we have reached | |
2068 | the end of the current block. */ | |
2069 | if (token->type == CPP_CLOSE_BRACE && nesting_depth-- == 0) | |
2070 | break; | |
2071 | /* If it the next token is a `{', then we are entering a new | |
2072 | block. Consume the entire block. */ | |
2073 | else if (token->type == CPP_OPEN_BRACE) | |
2074 | ++nesting_depth; | |
2075 | /* Consume the token. */ | |
2076 | cp_lexer_consume_token (parser->lexer); | |
2077 | } | |
2078 | } | |
2079 | ||
2080 | /* Create a new C++ parser. */ | |
2081 | ||
2082 | static cp_parser * | |
94edc4ab | 2083 | cp_parser_new (void) |
a723baf1 MM |
2084 | { |
2085 | cp_parser *parser; | |
17211ab5 GK |
2086 | cp_lexer *lexer; |
2087 | ||
2088 | /* cp_lexer_new_main is called before calling ggc_alloc because | |
2089 | cp_lexer_new_main might load a PCH file. */ | |
2090 | lexer = cp_lexer_new_main (); | |
a723baf1 | 2091 | |
c68b0a84 | 2092 | parser = ggc_alloc_cleared (sizeof (cp_parser)); |
17211ab5 | 2093 | parser->lexer = lexer; |
a723baf1 MM |
2094 | parser->context = cp_parser_context_new (NULL); |
2095 | ||
2096 | /* For now, we always accept GNU extensions. */ | |
2097 | parser->allow_gnu_extensions_p = 1; | |
2098 | ||
2099 | /* The `>' token is a greater-than operator, not the end of a | |
2100 | template-id. */ | |
2101 | parser->greater_than_is_operator_p = true; | |
2102 | ||
2103 | parser->default_arg_ok_p = true; | |
2104 | ||
2105 | /* We are not parsing a constant-expression. */ | |
2106 | parser->constant_expression_p = false; | |
14d22dd6 MM |
2107 | parser->allow_non_constant_expression_p = false; |
2108 | parser->non_constant_expression_p = false; | |
a723baf1 MM |
2109 | |
2110 | /* Local variable names are not forbidden. */ | |
2111 | parser->local_variables_forbidden_p = false; | |
2112 | ||
34cd5ae7 | 2113 | /* We are not processing an `extern "C"' declaration. */ |
a723baf1 MM |
2114 | parser->in_unbraced_linkage_specification_p = false; |
2115 | ||
2116 | /* We are not processing a declarator. */ | |
2117 | parser->in_declarator_p = false; | |
2118 | ||
a723baf1 MM |
2119 | /* The unparsed function queue is empty. */ |
2120 | parser->unparsed_functions_queues = build_tree_list (NULL_TREE, NULL_TREE); | |
2121 | ||
2122 | /* There are no classes being defined. */ | |
2123 | parser->num_classes_being_defined = 0; | |
2124 | ||
2125 | /* No template parameters apply. */ | |
2126 | parser->num_template_parameter_lists = 0; | |
2127 | ||
2128 | return parser; | |
2129 | } | |
2130 | ||
2131 | /* Lexical conventions [gram.lex] */ | |
2132 | ||
2133 | /* Parse an identifier. Returns an IDENTIFIER_NODE representing the | |
2134 | identifier. */ | |
2135 | ||
2136 | static tree | |
94edc4ab | 2137 | cp_parser_identifier (cp_parser* parser) |
a723baf1 MM |
2138 | { |
2139 | cp_token *token; | |
2140 | ||
2141 | /* Look for the identifier. */ | |
2142 | token = cp_parser_require (parser, CPP_NAME, "identifier"); | |
2143 | /* Return the value. */ | |
2144 | return token ? token->value : error_mark_node; | |
2145 | } | |
2146 | ||
2147 | /* Basic concepts [gram.basic] */ | |
2148 | ||
2149 | /* Parse a translation-unit. | |
2150 | ||
2151 | translation-unit: | |
2152 | declaration-seq [opt] | |
2153 | ||
2154 | Returns TRUE if all went well. */ | |
2155 | ||
2156 | static bool | |
94edc4ab | 2157 | cp_parser_translation_unit (cp_parser* parser) |
a723baf1 MM |
2158 | { |
2159 | while (true) | |
2160 | { | |
2161 | cp_parser_declaration_seq_opt (parser); | |
2162 | ||
2163 | /* If there are no tokens left then all went well. */ | |
2164 | if (cp_lexer_next_token_is (parser->lexer, CPP_EOF)) | |
2165 | break; | |
2166 | ||
2167 | /* Otherwise, issue an error message. */ | |
2168 | cp_parser_error (parser, "expected declaration"); | |
2169 | return false; | |
2170 | } | |
2171 | ||
2172 | /* Consume the EOF token. */ | |
2173 | cp_parser_require (parser, CPP_EOF, "end-of-file"); | |
2174 | ||
2175 | /* Finish up. */ | |
2176 | finish_translation_unit (); | |
2177 | ||
2178 | /* All went well. */ | |
2179 | return true; | |
2180 | } | |
2181 | ||
2182 | /* Expressions [gram.expr] */ | |
2183 | ||
2184 | /* Parse a primary-expression. | |
2185 | ||
2186 | primary-expression: | |
2187 | literal | |
2188 | this | |
2189 | ( expression ) | |
2190 | id-expression | |
2191 | ||
2192 | GNU Extensions: | |
2193 | ||
2194 | primary-expression: | |
2195 | ( compound-statement ) | |
2196 | __builtin_va_arg ( assignment-expression , type-id ) | |
2197 | ||
2198 | literal: | |
2199 | __null | |
2200 | ||
2201 | Returns a representation of the expression. | |
2202 | ||
2203 | *IDK indicates what kind of id-expression (if any) was present. | |
2204 | ||
2205 | *QUALIFYING_CLASS is set to a non-NULL value if the id-expression can be | |
2206 | used as the operand of a pointer-to-member. In that case, | |
2207 | *QUALIFYING_CLASS gives the class that is used as the qualifying | |
2208 | class in the pointer-to-member. */ | |
2209 | ||
2210 | static tree | |
2211 | cp_parser_primary_expression (cp_parser *parser, | |
b3445994 | 2212 | cp_id_kind *idk, |
a723baf1 MM |
2213 | tree *qualifying_class) |
2214 | { | |
2215 | cp_token *token; | |
2216 | ||
2217 | /* Assume the primary expression is not an id-expression. */ | |
b3445994 | 2218 | *idk = CP_ID_KIND_NONE; |
a723baf1 MM |
2219 | /* And that it cannot be used as pointer-to-member. */ |
2220 | *qualifying_class = NULL_TREE; | |
2221 | ||
2222 | /* Peek at the next token. */ | |
2223 | token = cp_lexer_peek_token (parser->lexer); | |
2224 | switch (token->type) | |
2225 | { | |
2226 | /* literal: | |
2227 | integer-literal | |
2228 | character-literal | |
2229 | floating-literal | |
2230 | string-literal | |
2231 | boolean-literal */ | |
2232 | case CPP_CHAR: | |
2233 | case CPP_WCHAR: | |
2234 | case CPP_STRING: | |
2235 | case CPP_WSTRING: | |
2236 | case CPP_NUMBER: | |
2237 | token = cp_lexer_consume_token (parser->lexer); | |
2238 | return token->value; | |
2239 | ||
2240 | case CPP_OPEN_PAREN: | |
2241 | { | |
2242 | tree expr; | |
2243 | bool saved_greater_than_is_operator_p; | |
2244 | ||
2245 | /* Consume the `('. */ | |
2246 | cp_lexer_consume_token (parser->lexer); | |
2247 | /* Within a parenthesized expression, a `>' token is always | |
2248 | the greater-than operator. */ | |
2249 | saved_greater_than_is_operator_p | |
2250 | = parser->greater_than_is_operator_p; | |
2251 | parser->greater_than_is_operator_p = true; | |
2252 | /* If we see `( { ' then we are looking at the beginning of | |
2253 | a GNU statement-expression. */ | |
2254 | if (cp_parser_allow_gnu_extensions_p (parser) | |
2255 | && cp_lexer_next_token_is (parser->lexer, CPP_OPEN_BRACE)) | |
2256 | { | |
2257 | /* Statement-expressions are not allowed by the standard. */ | |
2258 | if (pedantic) | |
2259 | pedwarn ("ISO C++ forbids braced-groups within expressions"); | |
2260 | ||
2261 | /* And they're not allowed outside of a function-body; you | |
2262 | cannot, for example, write: | |
2263 | ||
2264 | int i = ({ int j = 3; j + 1; }); | |
2265 | ||
2266 | at class or namespace scope. */ | |
2267 | if (!at_function_scope_p ()) | |
2268 | error ("statement-expressions are allowed only inside functions"); | |
2269 | /* Start the statement-expression. */ | |
2270 | expr = begin_stmt_expr (); | |
2271 | /* Parse the compound-statement. */ | |
a5bcc582 | 2272 | cp_parser_compound_statement (parser, true); |
a723baf1 | 2273 | /* Finish up. */ |
303b7406 | 2274 | expr = finish_stmt_expr (expr, false); |
a723baf1 MM |
2275 | } |
2276 | else | |
2277 | { | |
2278 | /* Parse the parenthesized expression. */ | |
2279 | expr = cp_parser_expression (parser); | |
2280 | /* Let the front end know that this expression was | |
2281 | enclosed in parentheses. This matters in case, for | |
2282 | example, the expression is of the form `A::B', since | |
2283 | `&A::B' might be a pointer-to-member, but `&(A::B)' is | |
2284 | not. */ | |
2285 | finish_parenthesized_expr (expr); | |
2286 | } | |
2287 | /* The `>' token might be the end of a template-id or | |
2288 | template-parameter-list now. */ | |
2289 | parser->greater_than_is_operator_p | |
2290 | = saved_greater_than_is_operator_p; | |
2291 | /* Consume the `)'. */ | |
2292 | if (!cp_parser_require (parser, CPP_CLOSE_PAREN, "`)'")) | |
2293 | cp_parser_skip_to_end_of_statement (parser); | |
2294 | ||
2295 | return expr; | |
2296 | } | |
2297 | ||
2298 | case CPP_KEYWORD: | |
2299 | switch (token->keyword) | |
2300 | { | |
2301 | /* These two are the boolean literals. */ | |
2302 | case RID_TRUE: | |
2303 | cp_lexer_consume_token (parser->lexer); | |
2304 | return boolean_true_node; | |
2305 | case RID_FALSE: | |
2306 | cp_lexer_consume_token (parser->lexer); | |
2307 | return boolean_false_node; | |
2308 | ||
2309 | /* The `__null' literal. */ | |
2310 | case RID_NULL: | |
2311 | cp_lexer_consume_token (parser->lexer); | |
2312 | return null_node; | |
2313 | ||
2314 | /* Recognize the `this' keyword. */ | |
2315 | case RID_THIS: | |
2316 | cp_lexer_consume_token (parser->lexer); | |
2317 | if (parser->local_variables_forbidden_p) | |
2318 | { | |
2319 | error ("`this' may not be used in this context"); | |
2320 | return error_mark_node; | |
2321 | } | |
14d22dd6 MM |
2322 | /* Pointers cannot appear in constant-expressions. */ |
2323 | if (parser->constant_expression_p) | |
2324 | { | |
2325 | if (!parser->allow_non_constant_expression_p) | |
2326 | return cp_parser_non_constant_expression ("`this'"); | |
2327 | parser->non_constant_expression_p = true; | |
2328 | } | |
a723baf1 MM |
2329 | return finish_this_expr (); |
2330 | ||
2331 | /* The `operator' keyword can be the beginning of an | |
2332 | id-expression. */ | |
2333 | case RID_OPERATOR: | |
2334 | goto id_expression; | |
2335 | ||
2336 | case RID_FUNCTION_NAME: | |
2337 | case RID_PRETTY_FUNCTION_NAME: | |
2338 | case RID_C99_FUNCTION_NAME: | |
2339 | /* The symbols __FUNCTION__, __PRETTY_FUNCTION__, and | |
2340 | __func__ are the names of variables -- but they are | |
2341 | treated specially. Therefore, they are handled here, | |
2342 | rather than relying on the generic id-expression logic | |
34cd5ae7 | 2343 | below. Grammatically, these names are id-expressions. |
a723baf1 MM |
2344 | |
2345 | Consume the token. */ | |
2346 | token = cp_lexer_consume_token (parser->lexer); | |
2347 | /* Look up the name. */ | |
2348 | return finish_fname (token->value); | |
2349 | ||
2350 | case RID_VA_ARG: | |
2351 | { | |
2352 | tree expression; | |
2353 | tree type; | |
2354 | ||
2355 | /* The `__builtin_va_arg' construct is used to handle | |
2356 | `va_arg'. Consume the `__builtin_va_arg' token. */ | |
2357 | cp_lexer_consume_token (parser->lexer); | |
2358 | /* Look for the opening `('. */ | |
2359 | cp_parser_require (parser, CPP_OPEN_PAREN, "`('"); | |
2360 | /* Now, parse the assignment-expression. */ | |
2361 | expression = cp_parser_assignment_expression (parser); | |
2362 | /* Look for the `,'. */ | |
2363 | cp_parser_require (parser, CPP_COMMA, "`,'"); | |
2364 | /* Parse the type-id. */ | |
2365 | type = cp_parser_type_id (parser); | |
2366 | /* Look for the closing `)'. */ | |
2367 | cp_parser_require (parser, CPP_CLOSE_PAREN, "`)'"); | |
14d22dd6 MM |
2368 | /* Using `va_arg' in a constant-expression is not |
2369 | allowed. */ | |
2370 | if (parser->constant_expression_p) | |
2371 | { | |
2372 | if (!parser->allow_non_constant_expression_p) | |
2373 | return cp_parser_non_constant_expression ("`va_arg'"); | |
2374 | parser->non_constant_expression_p = true; | |
2375 | } | |
a723baf1 MM |
2376 | return build_x_va_arg (expression, type); |
2377 | } | |
2378 | ||
2379 | default: | |
2380 | cp_parser_error (parser, "expected primary-expression"); | |
2381 | return error_mark_node; | |
2382 | } | |
a723baf1 MM |
2383 | |
2384 | /* An id-expression can start with either an identifier, a | |
2385 | `::' as the beginning of a qualified-id, or the "operator" | |
2386 | keyword. */ | |
2387 | case CPP_NAME: | |
2388 | case CPP_SCOPE: | |
2389 | case CPP_TEMPLATE_ID: | |
2390 | case CPP_NESTED_NAME_SPECIFIER: | |
2391 | { | |
2392 | tree id_expression; | |
2393 | tree decl; | |
b3445994 | 2394 | const char *error_msg; |
a723baf1 MM |
2395 | |
2396 | id_expression: | |
2397 | /* Parse the id-expression. */ | |
2398 | id_expression | |
2399 | = cp_parser_id_expression (parser, | |
2400 | /*template_keyword_p=*/false, | |
2401 | /*check_dependency_p=*/true, | |
f3c2dfc6 MM |
2402 | /*template_p=*/NULL, |
2403 | /*declarator_p=*/false); | |
a723baf1 MM |
2404 | if (id_expression == error_mark_node) |
2405 | return error_mark_node; | |
2406 | /* If we have a template-id, then no further lookup is | |
2407 | required. If the template-id was for a template-class, we | |
2408 | will sometimes have a TYPE_DECL at this point. */ | |
2409 | else if (TREE_CODE (id_expression) == TEMPLATE_ID_EXPR | |
2410 | || TREE_CODE (id_expression) == TYPE_DECL) | |
2411 | decl = id_expression; | |
2412 | /* Look up the name. */ | |
2413 | else | |
2414 | { | |
2415 | decl = cp_parser_lookup_name_simple (parser, id_expression); | |
2416 | /* If name lookup gives us a SCOPE_REF, then the | |
2417 | qualifying scope was dependent. Just propagate the | |
2418 | name. */ | |
2419 | if (TREE_CODE (decl) == SCOPE_REF) | |
2420 | { | |
2421 | if (TYPE_P (TREE_OPERAND (decl, 0))) | |
2422 | *qualifying_class = TREE_OPERAND (decl, 0); | |
2423 | return decl; | |
2424 | } | |
2425 | /* Check to see if DECL is a local variable in a context | |
2426 | where that is forbidden. */ | |
2427 | if (parser->local_variables_forbidden_p | |
2428 | && local_variable_p (decl)) | |
2429 | { | |
2430 | /* It might be that we only found DECL because we are | |
2431 | trying to be generous with pre-ISO scoping rules. | |
2432 | For example, consider: | |
2433 | ||
2434 | int i; | |
2435 | void g() { | |
2436 | for (int i = 0; i < 10; ++i) {} | |
2437 | extern void f(int j = i); | |
2438 | } | |
2439 | ||
2440 | Here, name look up will originally find the out | |
2441 | of scope `i'. We need to issue a warning message, | |
2442 | but then use the global `i'. */ | |
2443 | decl = check_for_out_of_scope_variable (decl); | |
2444 | if (local_variable_p (decl)) | |
2445 | { | |
2446 | error ("local variable `%D' may not appear in this context", | |
2447 | decl); | |
2448 | return error_mark_node; | |
2449 | } | |
2450 | } | |
c006d942 | 2451 | } |
b3445994 MM |
2452 | |
2453 | decl = finish_id_expression (id_expression, decl, parser->scope, | |
2454 | idk, qualifying_class, | |
2455 | parser->constant_expression_p, | |
2456 | parser->allow_non_constant_expression_p, | |
2457 | &parser->non_constant_expression_p, | |
2458 | &error_msg); | |
2459 | if (error_msg) | |
2460 | cp_parser_error (parser, error_msg); | |
a723baf1 MM |
2461 | return decl; |
2462 | } | |
2463 | ||
2464 | /* Anything else is an error. */ | |
2465 | default: | |
2466 | cp_parser_error (parser, "expected primary-expression"); | |
2467 | return error_mark_node; | |
2468 | } | |
2469 | } | |
2470 | ||
2471 | /* Parse an id-expression. | |
2472 | ||
2473 | id-expression: | |
2474 | unqualified-id | |
2475 | qualified-id | |
2476 | ||
2477 | qualified-id: | |
2478 | :: [opt] nested-name-specifier template [opt] unqualified-id | |
2479 | :: identifier | |
2480 | :: operator-function-id | |
2481 | :: template-id | |
2482 | ||
2483 | Return a representation of the unqualified portion of the | |
2484 | identifier. Sets PARSER->SCOPE to the qualifying scope if there is | |
2485 | a `::' or nested-name-specifier. | |
2486 | ||
2487 | Often, if the id-expression was a qualified-id, the caller will | |
2488 | want to make a SCOPE_REF to represent the qualified-id. This | |
2489 | function does not do this in order to avoid wastefully creating | |
2490 | SCOPE_REFs when they are not required. | |
2491 | ||
a723baf1 MM |
2492 | If TEMPLATE_KEYWORD_P is true, then we have just seen the |
2493 | `template' keyword. | |
2494 | ||
2495 | If CHECK_DEPENDENCY_P is false, then names are looked up inside | |
2496 | uninstantiated templates. | |
2497 | ||
15d2cb19 | 2498 | If *TEMPLATE_P is non-NULL, it is set to true iff the |
a723baf1 | 2499 | `template' keyword is used to explicitly indicate that the entity |
f3c2dfc6 MM |
2500 | named is a template. |
2501 | ||
2502 | If DECLARATOR_P is true, the id-expression is appearing as part of | |
2503 | a declarator, rather than as part of an exprsesion. */ | |
a723baf1 MM |
2504 | |
2505 | static tree | |
2506 | cp_parser_id_expression (cp_parser *parser, | |
2507 | bool template_keyword_p, | |
2508 | bool check_dependency_p, | |
f3c2dfc6 MM |
2509 | bool *template_p, |
2510 | bool declarator_p) | |
a723baf1 MM |
2511 | { |
2512 | bool global_scope_p; | |
2513 | bool nested_name_specifier_p; | |
2514 | ||
2515 | /* Assume the `template' keyword was not used. */ | |
2516 | if (template_p) | |
2517 | *template_p = false; | |
2518 | ||
2519 | /* Look for the optional `::' operator. */ | |
2520 | global_scope_p | |
2521 | = (cp_parser_global_scope_opt (parser, /*current_scope_valid_p=*/false) | |
2522 | != NULL_TREE); | |
2523 | /* Look for the optional nested-name-specifier. */ | |
2524 | nested_name_specifier_p | |
2525 | = (cp_parser_nested_name_specifier_opt (parser, | |
2526 | /*typename_keyword_p=*/false, | |
2527 | check_dependency_p, | |
2528 | /*type_p=*/false) | |
2529 | != NULL_TREE); | |
2530 | /* If there is a nested-name-specifier, then we are looking at | |
2531 | the first qualified-id production. */ | |
2532 | if (nested_name_specifier_p) | |
2533 | { | |
2534 | tree saved_scope; | |
2535 | tree saved_object_scope; | |
2536 | tree saved_qualifying_scope; | |
2537 | tree unqualified_id; | |
2538 | bool is_template; | |
2539 | ||
2540 | /* See if the next token is the `template' keyword. */ | |
2541 | if (!template_p) | |
2542 | template_p = &is_template; | |
2543 | *template_p = cp_parser_optional_template_keyword (parser); | |
2544 | /* Name lookup we do during the processing of the | |
2545 | unqualified-id might obliterate SCOPE. */ | |
2546 | saved_scope = parser->scope; | |
2547 | saved_object_scope = parser->object_scope; | |
2548 | saved_qualifying_scope = parser->qualifying_scope; | |
2549 | /* Process the final unqualified-id. */ | |
2550 | unqualified_id = cp_parser_unqualified_id (parser, *template_p, | |
f3c2dfc6 MM |
2551 | check_dependency_p, |
2552 | declarator_p); | |
a723baf1 MM |
2553 | /* Restore the SAVED_SCOPE for our caller. */ |
2554 | parser->scope = saved_scope; | |
2555 | parser->object_scope = saved_object_scope; | |
2556 | parser->qualifying_scope = saved_qualifying_scope; | |
2557 | ||
2558 | return unqualified_id; | |
2559 | } | |
2560 | /* Otherwise, if we are in global scope, then we are looking at one | |
2561 | of the other qualified-id productions. */ | |
2562 | else if (global_scope_p) | |
2563 | { | |
2564 | cp_token *token; | |
2565 | tree id; | |
2566 | ||
e5976695 MM |
2567 | /* Peek at the next token. */ |
2568 | token = cp_lexer_peek_token (parser->lexer); | |
2569 | ||
2570 | /* If it's an identifier, and the next token is not a "<", then | |
2571 | we can avoid the template-id case. This is an optimization | |
2572 | for this common case. */ | |
2573 | if (token->type == CPP_NAME | |
2574 | && cp_lexer_peek_nth_token (parser->lexer, 2)->type != CPP_LESS) | |
2575 | return cp_parser_identifier (parser); | |
2576 | ||
a723baf1 MM |
2577 | cp_parser_parse_tentatively (parser); |
2578 | /* Try a template-id. */ | |
2579 | id = cp_parser_template_id (parser, | |
2580 | /*template_keyword_p=*/false, | |
2581 | /*check_dependency_p=*/true); | |
2582 | /* If that worked, we're done. */ | |
2583 | if (cp_parser_parse_definitely (parser)) | |
2584 | return id; | |
2585 | ||
e5976695 MM |
2586 | /* Peek at the next token. (Changes in the token buffer may |
2587 | have invalidated the pointer obtained above.) */ | |
a723baf1 MM |
2588 | token = cp_lexer_peek_token (parser->lexer); |
2589 | ||
2590 | switch (token->type) | |
2591 | { | |
2592 | case CPP_NAME: | |
2593 | return cp_parser_identifier (parser); | |
2594 | ||
2595 | case CPP_KEYWORD: | |
2596 | if (token->keyword == RID_OPERATOR) | |
2597 | return cp_parser_operator_function_id (parser); | |
2598 | /* Fall through. */ | |
2599 | ||
2600 | default: | |
2601 | cp_parser_error (parser, "expected id-expression"); | |
2602 | return error_mark_node; | |
2603 | } | |
2604 | } | |
2605 | else | |
2606 | return cp_parser_unqualified_id (parser, template_keyword_p, | |
f3c2dfc6 MM |
2607 | /*check_dependency_p=*/true, |
2608 | declarator_p); | |
a723baf1 MM |
2609 | } |
2610 | ||
2611 | /* Parse an unqualified-id. | |
2612 | ||
2613 | unqualified-id: | |
2614 | identifier | |
2615 | operator-function-id | |
2616 | conversion-function-id | |
2617 | ~ class-name | |
2618 | template-id | |
2619 | ||
2620 | If TEMPLATE_KEYWORD_P is TRUE, we have just seen the `template' | |
2621 | keyword, in a construct like `A::template ...'. | |
2622 | ||
2623 | Returns a representation of unqualified-id. For the `identifier' | |
2624 | production, an IDENTIFIER_NODE is returned. For the `~ class-name' | |
2625 | production a BIT_NOT_EXPR is returned; the operand of the | |
2626 | BIT_NOT_EXPR is an IDENTIFIER_NODE for the class-name. For the | |
2627 | other productions, see the documentation accompanying the | |
2628 | corresponding parsing functions. If CHECK_DEPENDENCY_P is false, | |
f3c2dfc6 MM |
2629 | names are looked up in uninstantiated templates. If DECLARATOR_P |
2630 | is true, the unqualified-id is appearing as part of a declarator, | |
2631 | rather than as part of an expression. */ | |
a723baf1 MM |
2632 | |
2633 | static tree | |
94edc4ab NN |
2634 | cp_parser_unqualified_id (cp_parser* parser, |
2635 | bool template_keyword_p, | |
f3c2dfc6 MM |
2636 | bool check_dependency_p, |
2637 | bool declarator_p) | |
a723baf1 MM |
2638 | { |
2639 | cp_token *token; | |
2640 | ||
2641 | /* Peek at the next token. */ | |
2642 | token = cp_lexer_peek_token (parser->lexer); | |
2643 | ||
2644 | switch (token->type) | |
2645 | { | |
2646 | case CPP_NAME: | |
2647 | { | |
2648 | tree id; | |
2649 | ||
2650 | /* We don't know yet whether or not this will be a | |
2651 | template-id. */ | |
2652 | cp_parser_parse_tentatively (parser); | |
2653 | /* Try a template-id. */ | |
2654 | id = cp_parser_template_id (parser, template_keyword_p, | |
2655 | check_dependency_p); | |
2656 | /* If it worked, we're done. */ | |
2657 | if (cp_parser_parse_definitely (parser)) | |
2658 | return id; | |
2659 | /* Otherwise, it's an ordinary identifier. */ | |
2660 | return cp_parser_identifier (parser); | |
2661 | } | |
2662 | ||
2663 | case CPP_TEMPLATE_ID: | |
2664 | return cp_parser_template_id (parser, template_keyword_p, | |
2665 | check_dependency_p); | |
2666 | ||
2667 | case CPP_COMPL: | |
2668 | { | |
2669 | tree type_decl; | |
2670 | tree qualifying_scope; | |
2671 | tree object_scope; | |
2672 | tree scope; | |
2673 | ||
2674 | /* Consume the `~' token. */ | |
2675 | cp_lexer_consume_token (parser->lexer); | |
2676 | /* Parse the class-name. The standard, as written, seems to | |
2677 | say that: | |
2678 | ||
2679 | template <typename T> struct S { ~S (); }; | |
2680 | template <typename T> S<T>::~S() {} | |
2681 | ||
2682 | is invalid, since `~' must be followed by a class-name, but | |
2683 | `S<T>' is dependent, and so not known to be a class. | |
2684 | That's not right; we need to look in uninstantiated | |
2685 | templates. A further complication arises from: | |
2686 | ||
2687 | template <typename T> void f(T t) { | |
2688 | t.T::~T(); | |
2689 | } | |
2690 | ||
2691 | Here, it is not possible to look up `T' in the scope of `T' | |
2692 | itself. We must look in both the current scope, and the | |
2693 | scope of the containing complete expression. | |
2694 | ||
2695 | Yet another issue is: | |
2696 | ||
2697 | struct S { | |
2698 | int S; | |
2699 | ~S(); | |
2700 | }; | |
2701 | ||
2702 | S::~S() {} | |
2703 | ||
2704 | The standard does not seem to say that the `S' in `~S' | |
2705 | should refer to the type `S' and not the data member | |
2706 | `S::S'. */ | |
2707 | ||
2708 | /* DR 244 says that we look up the name after the "~" in the | |
2709 | same scope as we looked up the qualifying name. That idea | |
2710 | isn't fully worked out; it's more complicated than that. */ | |
2711 | scope = parser->scope; | |
2712 | object_scope = parser->object_scope; | |
2713 | qualifying_scope = parser->qualifying_scope; | |
2714 | ||
2715 | /* If the name is of the form "X::~X" it's OK. */ | |
2716 | if (scope && TYPE_P (scope) | |
2717 | && cp_lexer_next_token_is (parser->lexer, CPP_NAME) | |
2718 | && (cp_lexer_peek_nth_token (parser->lexer, 2)->type | |
2719 | == CPP_OPEN_PAREN) | |
2720 | && (cp_lexer_peek_token (parser->lexer)->value | |
2721 | == TYPE_IDENTIFIER (scope))) | |
2722 | { | |
2723 | cp_lexer_consume_token (parser->lexer); | |
2724 | return build_nt (BIT_NOT_EXPR, scope); | |
2725 | } | |
2726 | ||
2727 | /* If there was an explicit qualification (S::~T), first look | |
2728 | in the scope given by the qualification (i.e., S). */ | |
2729 | if (scope) | |
2730 | { | |
2731 | cp_parser_parse_tentatively (parser); | |
2732 | type_decl = cp_parser_class_name (parser, | |
2733 | /*typename_keyword_p=*/false, | |
2734 | /*template_keyword_p=*/false, | |
2735 | /*type_p=*/false, | |
a723baf1 MM |
2736 | /*check_dependency=*/false, |
2737 | /*class_head_p=*/false); | |
2738 | if (cp_parser_parse_definitely (parser)) | |
2739 | return build_nt (BIT_NOT_EXPR, TREE_TYPE (type_decl)); | |
2740 | } | |
2741 | /* In "N::S::~S", look in "N" as well. */ | |
2742 | if (scope && qualifying_scope) | |
2743 | { | |
2744 | cp_parser_parse_tentatively (parser); | |
2745 | parser->scope = qualifying_scope; | |
2746 | parser->object_scope = NULL_TREE; | |
2747 | parser->qualifying_scope = NULL_TREE; | |
2748 | type_decl | |
2749 | = cp_parser_class_name (parser, | |
2750 | /*typename_keyword_p=*/false, | |
2751 | /*template_keyword_p=*/false, | |
2752 | /*type_p=*/false, | |
a723baf1 MM |
2753 | /*check_dependency=*/false, |
2754 | /*class_head_p=*/false); | |
2755 | if (cp_parser_parse_definitely (parser)) | |
2756 | return build_nt (BIT_NOT_EXPR, TREE_TYPE (type_decl)); | |
2757 | } | |
2758 | /* In "p->S::~T", look in the scope given by "*p" as well. */ | |
2759 | else if (object_scope) | |
2760 | { | |
2761 | cp_parser_parse_tentatively (parser); | |
2762 | parser->scope = object_scope; | |
2763 | parser->object_scope = NULL_TREE; | |
2764 | parser->qualifying_scope = NULL_TREE; | |
2765 | type_decl | |
2766 | = cp_parser_class_name (parser, | |
2767 | /*typename_keyword_p=*/false, | |
2768 | /*template_keyword_p=*/false, | |
2769 | /*type_p=*/false, | |
a723baf1 MM |
2770 | /*check_dependency=*/false, |
2771 | /*class_head_p=*/false); | |
2772 | if (cp_parser_parse_definitely (parser)) | |
2773 | return build_nt (BIT_NOT_EXPR, TREE_TYPE (type_decl)); | |
2774 | } | |
2775 | /* Look in the surrounding context. */ | |
2776 | parser->scope = NULL_TREE; | |
2777 | parser->object_scope = NULL_TREE; | |
2778 | parser->qualifying_scope = NULL_TREE; | |
2779 | type_decl | |
2780 | = cp_parser_class_name (parser, | |
2781 | /*typename_keyword_p=*/false, | |
2782 | /*template_keyword_p=*/false, | |
2783 | /*type_p=*/false, | |
a723baf1 MM |
2784 | /*check_dependency=*/false, |
2785 | /*class_head_p=*/false); | |
2786 | /* If an error occurred, assume that the name of the | |
2787 | destructor is the same as the name of the qualifying | |
2788 | class. That allows us to keep parsing after running | |
2789 | into ill-formed destructor names. */ | |
2790 | if (type_decl == error_mark_node && scope && TYPE_P (scope)) | |
2791 | return build_nt (BIT_NOT_EXPR, scope); | |
2792 | else if (type_decl == error_mark_node) | |
2793 | return error_mark_node; | |
2794 | ||
f3c2dfc6 MM |
2795 | /* [class.dtor] |
2796 | ||
2797 | A typedef-name that names a class shall not be used as the | |
2798 | identifier in the declarator for a destructor declaration. */ | |
2799 | if (declarator_p | |
2800 | && !DECL_IMPLICIT_TYPEDEF_P (type_decl) | |
2801 | && !DECL_SELF_REFERENCE_P (type_decl)) | |
2802 | error ("typedef-name `%D' used as destructor declarator", | |
2803 | type_decl); | |
2804 | ||
a723baf1 MM |
2805 | return build_nt (BIT_NOT_EXPR, TREE_TYPE (type_decl)); |
2806 | } | |
2807 | ||
2808 | case CPP_KEYWORD: | |
2809 | if (token->keyword == RID_OPERATOR) | |
2810 | { | |
2811 | tree id; | |
2812 | ||
2813 | /* This could be a template-id, so we try that first. */ | |
2814 | cp_parser_parse_tentatively (parser); | |
2815 | /* Try a template-id. */ | |
2816 | id = cp_parser_template_id (parser, template_keyword_p, | |
2817 | /*check_dependency_p=*/true); | |
2818 | /* If that worked, we're done. */ | |
2819 | if (cp_parser_parse_definitely (parser)) | |
2820 | return id; | |
2821 | /* We still don't know whether we're looking at an | |
2822 | operator-function-id or a conversion-function-id. */ | |
2823 | cp_parser_parse_tentatively (parser); | |
2824 | /* Try an operator-function-id. */ | |
2825 | id = cp_parser_operator_function_id (parser); | |
2826 | /* If that didn't work, try a conversion-function-id. */ | |
2827 | if (!cp_parser_parse_definitely (parser)) | |
2828 | id = cp_parser_conversion_function_id (parser); | |
2829 | ||
2830 | return id; | |
2831 | } | |
2832 | /* Fall through. */ | |
2833 | ||
2834 | default: | |
2835 | cp_parser_error (parser, "expected unqualified-id"); | |
2836 | return error_mark_node; | |
2837 | } | |
2838 | } | |
2839 | ||
2840 | /* Parse an (optional) nested-name-specifier. | |
2841 | ||
2842 | nested-name-specifier: | |
2843 | class-or-namespace-name :: nested-name-specifier [opt] | |
2844 | class-or-namespace-name :: template nested-name-specifier [opt] | |
2845 | ||
2846 | PARSER->SCOPE should be set appropriately before this function is | |
2847 | called. TYPENAME_KEYWORD_P is TRUE if the `typename' keyword is in | |
2848 | effect. TYPE_P is TRUE if we non-type bindings should be ignored | |
2849 | in name lookups. | |
2850 | ||
2851 | Sets PARSER->SCOPE to the class (TYPE) or namespace | |
2852 | (NAMESPACE_DECL) specified by the nested-name-specifier, or leaves | |
2853 | it unchanged if there is no nested-name-specifier. Returns the new | |
2854 | scope iff there is a nested-name-specifier, or NULL_TREE otherwise. */ | |
2855 | ||
2856 | static tree | |
2857 | cp_parser_nested_name_specifier_opt (cp_parser *parser, | |
2858 | bool typename_keyword_p, | |
2859 | bool check_dependency_p, | |
2860 | bool type_p) | |
2861 | { | |
2862 | bool success = false; | |
2863 | tree access_check = NULL_TREE; | |
2864 | ptrdiff_t start; | |
2050a1bb | 2865 | cp_token* token; |
a723baf1 MM |
2866 | |
2867 | /* If the next token corresponds to a nested name specifier, there | |
2050a1bb MM |
2868 | is no need to reparse it. However, if CHECK_DEPENDENCY_P is |
2869 | false, it may have been true before, in which case something | |
2870 | like `A<X>::B<Y>::C' may have resulted in a nested-name-specifier | |
2871 | of `A<X>::', where it should now be `A<X>::B<Y>::'. So, when | |
2872 | CHECK_DEPENDENCY_P is false, we have to fall through into the | |
2873 | main loop. */ | |
2874 | if (check_dependency_p | |
2875 | && cp_lexer_next_token_is (parser->lexer, CPP_NESTED_NAME_SPECIFIER)) | |
2876 | { | |
2877 | cp_parser_pre_parsed_nested_name_specifier (parser); | |
a723baf1 MM |
2878 | return parser->scope; |
2879 | } | |
2880 | ||
2881 | /* Remember where the nested-name-specifier starts. */ | |
2882 | if (cp_parser_parsing_tentatively (parser) | |
2883 | && !cp_parser_committed_to_tentative_parse (parser)) | |
2884 | { | |
2050a1bb | 2885 | token = cp_lexer_peek_token (parser->lexer); |
a723baf1 MM |
2886 | start = cp_lexer_token_difference (parser->lexer, |
2887 | parser->lexer->first_token, | |
2050a1bb | 2888 | token); |
a723baf1 MM |
2889 | } |
2890 | else | |
2891 | start = -1; | |
2892 | ||
8d241e0b | 2893 | push_deferring_access_checks (dk_deferred); |
cf22909c | 2894 | |
a723baf1 MM |
2895 | while (true) |
2896 | { | |
2897 | tree new_scope; | |
2898 | tree old_scope; | |
2899 | tree saved_qualifying_scope; | |
a723baf1 MM |
2900 | bool template_keyword_p; |
2901 | ||
2050a1bb MM |
2902 | /* Spot cases that cannot be the beginning of a |
2903 | nested-name-specifier. */ | |
2904 | token = cp_lexer_peek_token (parser->lexer); | |
2905 | ||
2906 | /* If the next token is CPP_NESTED_NAME_SPECIFIER, just process | |
2907 | the already parsed nested-name-specifier. */ | |
2908 | if (token->type == CPP_NESTED_NAME_SPECIFIER) | |
2909 | { | |
2910 | /* Grab the nested-name-specifier and continue the loop. */ | |
2911 | cp_parser_pre_parsed_nested_name_specifier (parser); | |
2912 | success = true; | |
2913 | continue; | |
2914 | } | |
2915 | ||
a723baf1 MM |
2916 | /* Spot cases that cannot be the beginning of a |
2917 | nested-name-specifier. On the second and subsequent times | |
2918 | through the loop, we look for the `template' keyword. */ | |
f7b5ecd9 | 2919 | if (success && token->keyword == RID_TEMPLATE) |
a723baf1 MM |
2920 | ; |
2921 | /* A template-id can start a nested-name-specifier. */ | |
f7b5ecd9 | 2922 | else if (token->type == CPP_TEMPLATE_ID) |
a723baf1 MM |
2923 | ; |
2924 | else | |
2925 | { | |
2926 | /* If the next token is not an identifier, then it is | |
2927 | definitely not a class-or-namespace-name. */ | |
f7b5ecd9 | 2928 | if (token->type != CPP_NAME) |
a723baf1 MM |
2929 | break; |
2930 | /* If the following token is neither a `<' (to begin a | |
2931 | template-id), nor a `::', then we are not looking at a | |
2932 | nested-name-specifier. */ | |
2933 | token = cp_lexer_peek_nth_token (parser->lexer, 2); | |
2934 | if (token->type != CPP_LESS && token->type != CPP_SCOPE) | |
2935 | break; | |
2936 | } | |
2937 | ||
2938 | /* The nested-name-specifier is optional, so we parse | |
2939 | tentatively. */ | |
2940 | cp_parser_parse_tentatively (parser); | |
2941 | ||
2942 | /* Look for the optional `template' keyword, if this isn't the | |
2943 | first time through the loop. */ | |
2944 | if (success) | |
2945 | template_keyword_p = cp_parser_optional_template_keyword (parser); | |
2946 | else | |
2947 | template_keyword_p = false; | |
2948 | ||
2949 | /* Save the old scope since the name lookup we are about to do | |
2950 | might destroy it. */ | |
2951 | old_scope = parser->scope; | |
2952 | saved_qualifying_scope = parser->qualifying_scope; | |
2953 | /* Parse the qualifying entity. */ | |
2954 | new_scope | |
2955 | = cp_parser_class_or_namespace_name (parser, | |
2956 | typename_keyword_p, | |
2957 | template_keyword_p, | |
2958 | check_dependency_p, | |
2959 | type_p); | |
2960 | /* Look for the `::' token. */ | |
2961 | cp_parser_require (parser, CPP_SCOPE, "`::'"); | |
2962 | ||
2963 | /* If we found what we wanted, we keep going; otherwise, we're | |
2964 | done. */ | |
2965 | if (!cp_parser_parse_definitely (parser)) | |
2966 | { | |
2967 | bool error_p = false; | |
2968 | ||
2969 | /* Restore the OLD_SCOPE since it was valid before the | |
2970 | failed attempt at finding the last | |
2971 | class-or-namespace-name. */ | |
2972 | parser->scope = old_scope; | |
2973 | parser->qualifying_scope = saved_qualifying_scope; | |
2974 | /* If the next token is an identifier, and the one after | |
2975 | that is a `::', then any valid interpretation would have | |
2976 | found a class-or-namespace-name. */ | |
2977 | while (cp_lexer_next_token_is (parser->lexer, CPP_NAME) | |
2978 | && (cp_lexer_peek_nth_token (parser->lexer, 2)->type | |
2979 | == CPP_SCOPE) | |
2980 | && (cp_lexer_peek_nth_token (parser->lexer, 3)->type | |
2981 | != CPP_COMPL)) | |
2982 | { | |
2983 | token = cp_lexer_consume_token (parser->lexer); | |
2984 | if (!error_p) | |
2985 | { | |
2986 | tree decl; | |
2987 | ||
2988 | decl = cp_parser_lookup_name_simple (parser, token->value); | |
2989 | if (TREE_CODE (decl) == TEMPLATE_DECL) | |
2990 | error ("`%D' used without template parameters", | |
2991 | decl); | |
2992 | else if (parser->scope) | |
2993 | { | |
2994 | if (TYPE_P (parser->scope)) | |
2995 | error ("`%T::%D' is not a class-name or " | |
2996 | "namespace-name", | |
2997 | parser->scope, token->value); | |
2998 | else | |
2999 | error ("`%D::%D' is not a class-name or " | |
3000 | "namespace-name", | |
3001 | parser->scope, token->value); | |
3002 | } | |
3003 | else | |
3004 | error ("`%D' is not a class-name or namespace-name", | |
3005 | token->value); | |
3006 | parser->scope = NULL_TREE; | |
3007 | error_p = true; | |
eea9800f MM |
3008 | /* Treat this as a successful nested-name-specifier |
3009 | due to: | |
3010 | ||
3011 | [basic.lookup.qual] | |
3012 | ||
3013 | If the name found is not a class-name (clause | |
3014 | _class_) or namespace-name (_namespace.def_), the | |
3015 | program is ill-formed. */ | |
3016 | success = true; | |
a723baf1 MM |
3017 | } |
3018 | cp_lexer_consume_token (parser->lexer); | |
3019 | } | |
3020 | break; | |
3021 | } | |
3022 | ||
3023 | /* We've found one valid nested-name-specifier. */ | |
3024 | success = true; | |
3025 | /* Make sure we look in the right scope the next time through | |
3026 | the loop. */ | |
3027 | parser->scope = (TREE_CODE (new_scope) == TYPE_DECL | |
3028 | ? TREE_TYPE (new_scope) | |
3029 | : new_scope); | |
3030 | /* If it is a class scope, try to complete it; we are about to | |
3031 | be looking up names inside the class. */ | |
8fbc5ae7 MM |
3032 | if (TYPE_P (parser->scope) |
3033 | /* Since checking types for dependency can be expensive, | |
3034 | avoid doing it if the type is already complete. */ | |
3035 | && !COMPLETE_TYPE_P (parser->scope) | |
3036 | /* Do not try to complete dependent types. */ | |
1fb3244a | 3037 | && !dependent_type_p (parser->scope)) |
a723baf1 MM |
3038 | complete_type (parser->scope); |
3039 | } | |
3040 | ||
cf22909c KL |
3041 | /* Retrieve any deferred checks. Do not pop this access checks yet |
3042 | so the memory will not be reclaimed during token replacing below. */ | |
3043 | access_check = get_deferred_access_checks (); | |
3044 | ||
a723baf1 MM |
3045 | /* If parsing tentatively, replace the sequence of tokens that makes |
3046 | up the nested-name-specifier with a CPP_NESTED_NAME_SPECIFIER | |
3047 | token. That way, should we re-parse the token stream, we will | |
3048 | not have to repeat the effort required to do the parse, nor will | |
3049 | we issue duplicate error messages. */ | |
3050 | if (success && start >= 0) | |
3051 | { | |
a723baf1 MM |
3052 | /* Find the token that corresponds to the start of the |
3053 | template-id. */ | |
3054 | token = cp_lexer_advance_token (parser->lexer, | |
3055 | parser->lexer->first_token, | |
3056 | start); | |
3057 | ||
a723baf1 MM |
3058 | /* Reset the contents of the START token. */ |
3059 | token->type = CPP_NESTED_NAME_SPECIFIER; | |
3060 | token->value = build_tree_list (access_check, parser->scope); | |
3061 | TREE_TYPE (token->value) = parser->qualifying_scope; | |
3062 | token->keyword = RID_MAX; | |
3063 | /* Purge all subsequent tokens. */ | |
3064 | cp_lexer_purge_tokens_after (parser->lexer, token); | |
3065 | } | |
3066 | ||
cf22909c | 3067 | pop_deferring_access_checks (); |
a723baf1 MM |
3068 | return success ? parser->scope : NULL_TREE; |
3069 | } | |
3070 | ||
3071 | /* Parse a nested-name-specifier. See | |
3072 | cp_parser_nested_name_specifier_opt for details. This function | |
3073 | behaves identically, except that it will an issue an error if no | |
3074 | nested-name-specifier is present, and it will return | |
3075 | ERROR_MARK_NODE, rather than NULL_TREE, if no nested-name-specifier | |
3076 | is present. */ | |
3077 | ||
3078 | static tree | |
3079 | cp_parser_nested_name_specifier (cp_parser *parser, | |
3080 | bool typename_keyword_p, | |
3081 | bool check_dependency_p, | |
3082 | bool type_p) | |
3083 | { | |
3084 | tree scope; | |
3085 | ||
3086 | /* Look for the nested-name-specifier. */ | |
3087 | scope = cp_parser_nested_name_specifier_opt (parser, | |
3088 | typename_keyword_p, | |
3089 | check_dependency_p, | |
3090 | type_p); | |
3091 | /* If it was not present, issue an error message. */ | |
3092 | if (!scope) | |
3093 | { | |
3094 | cp_parser_error (parser, "expected nested-name-specifier"); | |
eb5abb39 | 3095 | parser->scope = NULL_TREE; |
a723baf1 MM |
3096 | return error_mark_node; |
3097 | } | |
3098 | ||
3099 | return scope; | |
3100 | } | |
3101 | ||
3102 | /* Parse a class-or-namespace-name. | |
3103 | ||
3104 | class-or-namespace-name: | |
3105 | class-name | |
3106 | namespace-name | |
3107 | ||
3108 | TYPENAME_KEYWORD_P is TRUE iff the `typename' keyword is in effect. | |
3109 | TEMPLATE_KEYWORD_P is TRUE iff the `template' keyword is in effect. | |
3110 | CHECK_DEPENDENCY_P is FALSE iff dependent names should be looked up. | |
3111 | TYPE_P is TRUE iff the next name should be taken as a class-name, | |
3112 | even the same name is declared to be another entity in the same | |
3113 | scope. | |
3114 | ||
3115 | Returns the class (TYPE_DECL) or namespace (NAMESPACE_DECL) | |
eea9800f MM |
3116 | specified by the class-or-namespace-name. If neither is found the |
3117 | ERROR_MARK_NODE is returned. */ | |
a723baf1 MM |
3118 | |
3119 | static tree | |
3120 | cp_parser_class_or_namespace_name (cp_parser *parser, | |
3121 | bool typename_keyword_p, | |
3122 | bool template_keyword_p, | |
3123 | bool check_dependency_p, | |
3124 | bool type_p) | |
3125 | { | |
3126 | tree saved_scope; | |
3127 | tree saved_qualifying_scope; | |
3128 | tree saved_object_scope; | |
3129 | tree scope; | |
eea9800f | 3130 | bool only_class_p; |
a723baf1 | 3131 | |
a723baf1 MM |
3132 | /* Before we try to parse the class-name, we must save away the |
3133 | current PARSER->SCOPE since cp_parser_class_name will destroy | |
3134 | it. */ | |
3135 | saved_scope = parser->scope; | |
3136 | saved_qualifying_scope = parser->qualifying_scope; | |
3137 | saved_object_scope = parser->object_scope; | |
eea9800f MM |
3138 | /* Try for a class-name first. If the SAVED_SCOPE is a type, then |
3139 | there is no need to look for a namespace-name. */ | |
bbaab916 | 3140 | only_class_p = template_keyword_p || (saved_scope && TYPE_P (saved_scope)); |
eea9800f MM |
3141 | if (!only_class_p) |
3142 | cp_parser_parse_tentatively (parser); | |
a723baf1 MM |
3143 | scope = cp_parser_class_name (parser, |
3144 | typename_keyword_p, | |
3145 | template_keyword_p, | |
3146 | type_p, | |
a723baf1 MM |
3147 | check_dependency_p, |
3148 | /*class_head_p=*/false); | |
3149 | /* If that didn't work, try for a namespace-name. */ | |
eea9800f | 3150 | if (!only_class_p && !cp_parser_parse_definitely (parser)) |
a723baf1 MM |
3151 | { |
3152 | /* Restore the saved scope. */ | |
3153 | parser->scope = saved_scope; | |
3154 | parser->qualifying_scope = saved_qualifying_scope; | |
3155 | parser->object_scope = saved_object_scope; | |
eea9800f MM |
3156 | /* If we are not looking at an identifier followed by the scope |
3157 | resolution operator, then this is not part of a | |
3158 | nested-name-specifier. (Note that this function is only used | |
3159 | to parse the components of a nested-name-specifier.) */ | |
3160 | if (cp_lexer_next_token_is_not (parser->lexer, CPP_NAME) | |
3161 | || cp_lexer_peek_nth_token (parser->lexer, 2)->type != CPP_SCOPE) | |
3162 | return error_mark_node; | |
a723baf1 MM |
3163 | scope = cp_parser_namespace_name (parser); |
3164 | } | |
3165 | ||
3166 | return scope; | |
3167 | } | |
3168 | ||
3169 | /* Parse a postfix-expression. | |
3170 | ||
3171 | postfix-expression: | |
3172 | primary-expression | |
3173 | postfix-expression [ expression ] | |
3174 | postfix-expression ( expression-list [opt] ) | |
3175 | simple-type-specifier ( expression-list [opt] ) | |
3176 | typename :: [opt] nested-name-specifier identifier | |
3177 | ( expression-list [opt] ) | |
3178 | typename :: [opt] nested-name-specifier template [opt] template-id | |
3179 | ( expression-list [opt] ) | |
3180 | postfix-expression . template [opt] id-expression | |
3181 | postfix-expression -> template [opt] id-expression | |
3182 | postfix-expression . pseudo-destructor-name | |
3183 | postfix-expression -> pseudo-destructor-name | |
3184 | postfix-expression ++ | |
3185 | postfix-expression -- | |
3186 | dynamic_cast < type-id > ( expression ) | |
3187 | static_cast < type-id > ( expression ) | |
3188 | reinterpret_cast < type-id > ( expression ) | |
3189 | const_cast < type-id > ( expression ) | |
3190 | typeid ( expression ) | |
3191 | typeid ( type-id ) | |
3192 | ||
3193 | GNU Extension: | |
3194 | ||
3195 | postfix-expression: | |
3196 | ( type-id ) { initializer-list , [opt] } | |
3197 | ||
3198 | This extension is a GNU version of the C99 compound-literal | |
3199 | construct. (The C99 grammar uses `type-name' instead of `type-id', | |
3200 | but they are essentially the same concept.) | |
3201 | ||
3202 | If ADDRESS_P is true, the postfix expression is the operand of the | |
3203 | `&' operator. | |
3204 | ||
3205 | Returns a representation of the expression. */ | |
3206 | ||
3207 | static tree | |
3208 | cp_parser_postfix_expression (cp_parser *parser, bool address_p) | |
3209 | { | |
3210 | cp_token *token; | |
3211 | enum rid keyword; | |
b3445994 | 3212 | cp_id_kind idk = CP_ID_KIND_NONE; |
a723baf1 MM |
3213 | tree postfix_expression = NULL_TREE; |
3214 | /* Non-NULL only if the current postfix-expression can be used to | |
3215 | form a pointer-to-member. In that case, QUALIFYING_CLASS is the | |
3216 | class used to qualify the member. */ | |
3217 | tree qualifying_class = NULL_TREE; | |
a723baf1 MM |
3218 | |
3219 | /* Peek at the next token. */ | |
3220 | token = cp_lexer_peek_token (parser->lexer); | |
3221 | /* Some of the productions are determined by keywords. */ | |
3222 | keyword = token->keyword; | |
3223 | switch (keyword) | |
3224 | { | |
3225 | case RID_DYNCAST: | |
3226 | case RID_STATCAST: | |
3227 | case RID_REINTCAST: | |
3228 | case RID_CONSTCAST: | |
3229 | { | |
3230 | tree type; | |
3231 | tree expression; | |
3232 | const char *saved_message; | |
3233 | ||
3234 | /* All of these can be handled in the same way from the point | |
3235 | of view of parsing. Begin by consuming the token | |
3236 | identifying the cast. */ | |
3237 | cp_lexer_consume_token (parser->lexer); | |
3238 | ||
3239 | /* New types cannot be defined in the cast. */ | |
3240 | saved_message = parser->type_definition_forbidden_message; | |
3241 | parser->type_definition_forbidden_message | |
3242 | = "types may not be defined in casts"; | |
3243 | ||
3244 | /* Look for the opening `<'. */ | |
3245 | cp_parser_require (parser, CPP_LESS, "`<'"); | |
3246 | /* Parse the type to which we are casting. */ | |
3247 | type = cp_parser_type_id (parser); | |
3248 | /* Look for the closing `>'. */ | |
3249 | cp_parser_require (parser, CPP_GREATER, "`>'"); | |
3250 | /* Restore the old message. */ | |
3251 | parser->type_definition_forbidden_message = saved_message; | |
3252 | ||
3253 | /* And the expression which is being cast. */ | |
3254 | cp_parser_require (parser, CPP_OPEN_PAREN, "`('"); | |
3255 | expression = cp_parser_expression (parser); | |
3256 | cp_parser_require (parser, CPP_CLOSE_PAREN, "`)'"); | |
3257 | ||
14d22dd6 MM |
3258 | /* Only type conversions to integral or enumeration types |
3259 | can be used in constant-expressions. */ | |
3260 | if (parser->constant_expression_p | |
3261 | && !dependent_type_p (type) | |
3262 | && !INTEGRAL_OR_ENUMERATION_TYPE_P (type)) | |
3263 | { | |
3264 | if (!parser->allow_non_constant_expression_p) | |
3265 | return (cp_parser_non_constant_expression | |
3266 | ("a cast to a type other than an integral or " | |
3267 | "enumeration type")); | |
3268 | parser->non_constant_expression_p = true; | |
3269 | } | |
3270 | ||
a723baf1 MM |
3271 | switch (keyword) |
3272 | { | |
3273 | case RID_DYNCAST: | |
3274 | postfix_expression | |
3275 | = build_dynamic_cast (type, expression); | |
3276 | break; | |
3277 | case RID_STATCAST: | |
3278 | postfix_expression | |
3279 | = build_static_cast (type, expression); | |
3280 | break; | |
3281 | case RID_REINTCAST: | |
3282 | postfix_expression | |
3283 | = build_reinterpret_cast (type, expression); | |
3284 | break; | |
3285 | case RID_CONSTCAST: | |
3286 | postfix_expression | |
3287 | = build_const_cast (type, expression); | |
3288 | break; | |
3289 | default: | |
3290 | abort (); | |
3291 | } | |
3292 | } | |
3293 | break; | |
3294 | ||
3295 | case RID_TYPEID: | |
3296 | { | |
3297 | tree type; | |
3298 | const char *saved_message; | |
3299 | ||
3300 | /* Consume the `typeid' token. */ | |
3301 | cp_lexer_consume_token (parser->lexer); | |
3302 | /* Look for the `(' token. */ | |
3303 | cp_parser_require (parser, CPP_OPEN_PAREN, "`('"); | |
3304 | /* Types cannot be defined in a `typeid' expression. */ | |
3305 | saved_message = parser->type_definition_forbidden_message; | |
3306 | parser->type_definition_forbidden_message | |
3307 | = "types may not be defined in a `typeid\' expression"; | |
3308 | /* We can't be sure yet whether we're looking at a type-id or an | |
3309 | expression. */ | |
3310 | cp_parser_parse_tentatively (parser); | |
3311 | /* Try a type-id first. */ | |
3312 | type = cp_parser_type_id (parser); | |
3313 | /* Look for the `)' token. Otherwise, we can't be sure that | |
3314 | we're not looking at an expression: consider `typeid (int | |
3315 | (3))', for example. */ | |
3316 | cp_parser_require (parser, CPP_CLOSE_PAREN, "`)'"); | |
3317 | /* If all went well, simply lookup the type-id. */ | |
3318 | if (cp_parser_parse_definitely (parser)) | |
3319 | postfix_expression = get_typeid (type); | |
3320 | /* Otherwise, fall back to the expression variant. */ | |
3321 | else | |
3322 | { | |
3323 | tree expression; | |
3324 | ||
3325 | /* Look for an expression. */ | |
3326 | expression = cp_parser_expression (parser); | |
3327 | /* Compute its typeid. */ | |
3328 | postfix_expression = build_typeid (expression); | |
3329 | /* Look for the `)' token. */ | |
3330 | cp_parser_require (parser, CPP_CLOSE_PAREN, "`)'"); | |
3331 | } | |
3332 | ||
3333 | /* Restore the saved message. */ | |
3334 | parser->type_definition_forbidden_message = saved_message; | |
3335 | } | |
3336 | break; | |
3337 | ||
3338 | case RID_TYPENAME: | |
3339 | { | |
3340 | bool template_p = false; | |
3341 | tree id; | |
3342 | tree type; | |
3343 | ||
3344 | /* Consume the `typename' token. */ | |
3345 | cp_lexer_consume_token (parser->lexer); | |
3346 | /* Look for the optional `::' operator. */ | |
3347 | cp_parser_global_scope_opt (parser, | |
3348 | /*current_scope_valid_p=*/false); | |
3349 | /* Look for the nested-name-specifier. */ | |
3350 | cp_parser_nested_name_specifier (parser, | |
3351 | /*typename_keyword_p=*/true, | |
3352 | /*check_dependency_p=*/true, | |
3353 | /*type_p=*/true); | |
3354 | /* Look for the optional `template' keyword. */ | |
3355 | template_p = cp_parser_optional_template_keyword (parser); | |
3356 | /* We don't know whether we're looking at a template-id or an | |
3357 | identifier. */ | |
3358 | cp_parser_parse_tentatively (parser); | |
3359 | /* Try a template-id. */ | |
3360 | id = cp_parser_template_id (parser, template_p, | |
3361 | /*check_dependency_p=*/true); | |
3362 | /* If that didn't work, try an identifier. */ | |
3363 | if (!cp_parser_parse_definitely (parser)) | |
3364 | id = cp_parser_identifier (parser); | |
3365 | /* Create a TYPENAME_TYPE to represent the type to which the | |
3366 | functional cast is being performed. */ | |
3367 | type = make_typename_type (parser->scope, id, | |
3368 | /*complain=*/1); | |
3369 | ||
3370 | postfix_expression = cp_parser_functional_cast (parser, type); | |
3371 | } | |
3372 | break; | |
3373 | ||
3374 | default: | |
3375 | { | |
3376 | tree type; | |
3377 | ||
3378 | /* If the next thing is a simple-type-specifier, we may be | |
3379 | looking at a functional cast. We could also be looking at | |
3380 | an id-expression. So, we try the functional cast, and if | |
3381 | that doesn't work we fall back to the primary-expression. */ | |
3382 | cp_parser_parse_tentatively (parser); | |
3383 | /* Look for the simple-type-specifier. */ | |
3384 | type = cp_parser_simple_type_specifier (parser, | |
4b0d3cbe MM |
3385 | CP_PARSER_FLAGS_NONE, |
3386 | /*identifier_p=*/false); | |
a723baf1 MM |
3387 | /* Parse the cast itself. */ |
3388 | if (!cp_parser_error_occurred (parser)) | |
3389 | postfix_expression | |
3390 | = cp_parser_functional_cast (parser, type); | |
3391 | /* If that worked, we're done. */ | |
3392 | if (cp_parser_parse_definitely (parser)) | |
3393 | break; | |
3394 | ||
3395 | /* If the functional-cast didn't work out, try a | |
3396 | compound-literal. */ | |
14d22dd6 MM |
3397 | if (cp_parser_allow_gnu_extensions_p (parser) |
3398 | && cp_lexer_next_token_is (parser->lexer, CPP_OPEN_PAREN)) | |
a723baf1 MM |
3399 | { |
3400 | tree initializer_list = NULL_TREE; | |
3401 | ||
3402 | cp_parser_parse_tentatively (parser); | |
14d22dd6 MM |
3403 | /* Consume the `('. */ |
3404 | cp_lexer_consume_token (parser->lexer); | |
3405 | /* Parse the type. */ | |
3406 | type = cp_parser_type_id (parser); | |
3407 | /* Look for the `)'. */ | |
3408 | cp_parser_require (parser, CPP_CLOSE_PAREN, "`)'"); | |
3409 | /* Look for the `{'. */ | |
3410 | cp_parser_require (parser, CPP_OPEN_BRACE, "`{'"); | |
3411 | /* If things aren't going well, there's no need to | |
3412 | keep going. */ | |
3413 | if (!cp_parser_error_occurred (parser)) | |
a723baf1 | 3414 | { |
39703eb9 | 3415 | bool non_constant_p; |
14d22dd6 MM |
3416 | /* Parse the initializer-list. */ |
3417 | initializer_list | |
39703eb9 | 3418 | = cp_parser_initializer_list (parser, &non_constant_p); |
14d22dd6 MM |
3419 | /* Allow a trailing `,'. */ |
3420 | if (cp_lexer_next_token_is (parser->lexer, CPP_COMMA)) | |
3421 | cp_lexer_consume_token (parser->lexer); | |
3422 | /* Look for the final `}'. */ | |
3423 | cp_parser_require (parser, CPP_CLOSE_BRACE, "`}'"); | |
a723baf1 MM |
3424 | } |
3425 | /* If that worked, we're definitely looking at a | |
3426 | compound-literal expression. */ | |
3427 | if (cp_parser_parse_definitely (parser)) | |
3428 | { | |
3429 | /* Warn the user that a compound literal is not | |
3430 | allowed in standard C++. */ | |
3431 | if (pedantic) | |
3432 | pedwarn ("ISO C++ forbids compound-literals"); | |
3433 | /* Form the representation of the compound-literal. */ | |
3434 | postfix_expression | |
3435 | = finish_compound_literal (type, initializer_list); | |
3436 | break; | |
3437 | } | |
3438 | } | |
3439 | ||
3440 | /* It must be a primary-expression. */ | |
3441 | postfix_expression = cp_parser_primary_expression (parser, | |
3442 | &idk, | |
3443 | &qualifying_class); | |
3444 | } | |
3445 | break; | |
3446 | } | |
3447 | ||
ee76b931 MM |
3448 | /* If we were avoiding committing to the processing of a |
3449 | qualified-id until we knew whether or not we had a | |
3450 | pointer-to-member, we now know. */ | |
089d6ea7 | 3451 | if (qualifying_class) |
a723baf1 | 3452 | { |
ee76b931 | 3453 | bool done; |
a723baf1 | 3454 | |
ee76b931 MM |
3455 | /* Peek at the next token. */ |
3456 | token = cp_lexer_peek_token (parser->lexer); | |
3457 | done = (token->type != CPP_OPEN_SQUARE | |
3458 | && token->type != CPP_OPEN_PAREN | |
3459 | && token->type != CPP_DOT | |
3460 | && token->type != CPP_DEREF | |
3461 | && token->type != CPP_PLUS_PLUS | |
3462 | && token->type != CPP_MINUS_MINUS); | |
3463 | ||
3464 | postfix_expression = finish_qualified_id_expr (qualifying_class, | |
3465 | postfix_expression, | |
3466 | done, | |
3467 | address_p); | |
3468 | if (done) | |
3469 | return postfix_expression; | |
a723baf1 MM |
3470 | } |
3471 | ||
a723baf1 MM |
3472 | /* Keep looping until the postfix-expression is complete. */ |
3473 | while (true) | |
3474 | { | |
10b1d5e7 MM |
3475 | if (idk == CP_ID_KIND_UNQUALIFIED |
3476 | && TREE_CODE (postfix_expression) == IDENTIFIER_NODE | |
a723baf1 | 3477 | && cp_lexer_next_token_is_not (parser->lexer, CPP_OPEN_PAREN)) |
b3445994 MM |
3478 | /* It is not a Koenig lookup function call. */ |
3479 | postfix_expression | |
3480 | = unqualified_name_lookup_error (postfix_expression); | |
a723baf1 MM |
3481 | |
3482 | /* Peek at the next token. */ | |
3483 | token = cp_lexer_peek_token (parser->lexer); | |
3484 | ||
3485 | switch (token->type) | |
3486 | { | |
3487 | case CPP_OPEN_SQUARE: | |
3488 | /* postfix-expression [ expression ] */ | |
3489 | { | |
3490 | tree index; | |
3491 | ||
3492 | /* Consume the `[' token. */ | |
3493 | cp_lexer_consume_token (parser->lexer); | |
3494 | /* Parse the index expression. */ | |
3495 | index = cp_parser_expression (parser); | |
3496 | /* Look for the closing `]'. */ | |
3497 | cp_parser_require (parser, CPP_CLOSE_SQUARE, "`]'"); | |
3498 | ||
3499 | /* Build the ARRAY_REF. */ | |
3500 | postfix_expression | |
3501 | = grok_array_decl (postfix_expression, index); | |
b3445994 | 3502 | idk = CP_ID_KIND_NONE; |
a723baf1 MM |
3503 | } |
3504 | break; | |
3505 | ||
3506 | case CPP_OPEN_PAREN: | |
3507 | /* postfix-expression ( expression-list [opt] ) */ | |
3508 | { | |
39703eb9 MM |
3509 | tree args = (cp_parser_parenthesized_expression_list |
3510 | (parser, false, /*non_constant_p=*/NULL)); | |
a723baf1 | 3511 | |
7efa3e22 NS |
3512 | if (args == error_mark_node) |
3513 | { | |
3514 | postfix_expression = error_mark_node; | |
3515 | break; | |
3516 | } | |
3517 | ||
14d22dd6 MM |
3518 | /* Function calls are not permitted in |
3519 | constant-expressions. */ | |
3520 | if (parser->constant_expression_p) | |
3521 | { | |
3522 | if (!parser->allow_non_constant_expression_p) | |
3523 | return cp_parser_non_constant_expression ("a function call"); | |
3524 | parser->non_constant_expression_p = true; | |
3525 | } | |
a723baf1 | 3526 | |
399dedb9 NS |
3527 | if (idk == CP_ID_KIND_UNQUALIFIED) |
3528 | { | |
3529 | if (args | |
3530 | && (is_overloaded_fn (postfix_expression) | |
3531 | || DECL_P (postfix_expression) | |
3532 | || TREE_CODE (postfix_expression) == IDENTIFIER_NODE)) | |
3533 | postfix_expression | |
3534 | = perform_koenig_lookup (postfix_expression, args); | |
3535 | else if (TREE_CODE (postfix_expression) == IDENTIFIER_NODE) | |
3536 | postfix_expression | |
3537 | = unqualified_fn_lookup_error (postfix_expression); | |
3538 | } | |
3539 | ||
d17811fd | 3540 | if (TREE_CODE (postfix_expression) == COMPONENT_REF) |
a723baf1 | 3541 | { |
d17811fd MM |
3542 | tree instance = TREE_OPERAND (postfix_expression, 0); |
3543 | tree fn = TREE_OPERAND (postfix_expression, 1); | |
3544 | ||
3545 | if (processing_template_decl | |
3546 | && (type_dependent_expression_p (instance) | |
3547 | || (!BASELINK_P (fn) | |
3548 | && TREE_CODE (fn) != FIELD_DECL) | |
584672ee | 3549 | || type_dependent_expression_p (fn) |
d17811fd MM |
3550 | || any_type_dependent_arguments_p (args))) |
3551 | { | |
3552 | postfix_expression | |
3553 | = build_min_nt (CALL_EXPR, postfix_expression, args); | |
3554 | break; | |
3555 | } | |
3556 | ||
3557 | postfix_expression | |
3558 | = (build_new_method_call | |
3559 | (instance, fn, args, NULL_TREE, | |
b3445994 | 3560 | (idk == CP_ID_KIND_QUALIFIED |
d17811fd | 3561 | ? LOOKUP_NONVIRTUAL : LOOKUP_NORMAL))); |
a723baf1 | 3562 | } |
d17811fd MM |
3563 | else if (TREE_CODE (postfix_expression) == OFFSET_REF |
3564 | || TREE_CODE (postfix_expression) == MEMBER_REF | |
3565 | || TREE_CODE (postfix_expression) == DOTSTAR_EXPR) | |
a723baf1 MM |
3566 | postfix_expression = (build_offset_ref_call_from_tree |
3567 | (postfix_expression, args)); | |
b3445994 | 3568 | else if (idk == CP_ID_KIND_QUALIFIED) |
2050a1bb MM |
3569 | /* A call to a static class member, or a namespace-scope |
3570 | function. */ | |
3571 | postfix_expression | |
3572 | = finish_call_expr (postfix_expression, args, | |
3573 | /*disallow_virtual=*/true); | |
a723baf1 | 3574 | else |
2050a1bb MM |
3575 | /* All other function calls. */ |
3576 | postfix_expression | |
3577 | = finish_call_expr (postfix_expression, args, | |
3578 | /*disallow_virtual=*/false); | |
a723baf1 MM |
3579 | |
3580 | /* The POSTFIX_EXPRESSION is certainly no longer an id. */ | |
b3445994 | 3581 | idk = CP_ID_KIND_NONE; |
a723baf1 MM |
3582 | } |
3583 | break; | |
3584 | ||
3585 | case CPP_DOT: | |
3586 | case CPP_DEREF: | |
3587 | /* postfix-expression . template [opt] id-expression | |
3588 | postfix-expression . pseudo-destructor-name | |
3589 | postfix-expression -> template [opt] id-expression | |
3590 | postfix-expression -> pseudo-destructor-name */ | |
3591 | { | |
3592 | tree name; | |
3593 | bool dependent_p; | |
3594 | bool template_p; | |
3595 | tree scope = NULL_TREE; | |
3596 | ||
3597 | /* If this is a `->' operator, dereference the pointer. */ | |
3598 | if (token->type == CPP_DEREF) | |
3599 | postfix_expression = build_x_arrow (postfix_expression); | |
3600 | /* Check to see whether or not the expression is | |
3601 | type-dependent. */ | |
bbaab916 | 3602 | dependent_p = type_dependent_expression_p (postfix_expression); |
a723baf1 MM |
3603 | /* The identifier following the `->' or `.' is not |
3604 | qualified. */ | |
3605 | parser->scope = NULL_TREE; | |
3606 | parser->qualifying_scope = NULL_TREE; | |
3607 | parser->object_scope = NULL_TREE; | |
b3445994 | 3608 | idk = CP_ID_KIND_NONE; |
a723baf1 MM |
3609 | /* Enter the scope corresponding to the type of the object |
3610 | given by the POSTFIX_EXPRESSION. */ | |
3611 | if (!dependent_p | |
3612 | && TREE_TYPE (postfix_expression) != NULL_TREE) | |
3613 | { | |
3614 | scope = TREE_TYPE (postfix_expression); | |
3615 | /* According to the standard, no expression should | |
3616 | ever have reference type. Unfortunately, we do not | |
3617 | currently match the standard in this respect in | |
3618 | that our internal representation of an expression | |
3619 | may have reference type even when the standard says | |
3620 | it does not. Therefore, we have to manually obtain | |
3621 | the underlying type here. */ | |
ee76b931 | 3622 | scope = non_reference (scope); |
a723baf1 MM |
3623 | /* The type of the POSTFIX_EXPRESSION must be |
3624 | complete. */ | |
3625 | scope = complete_type_or_else (scope, NULL_TREE); | |
3626 | /* Let the name lookup machinery know that we are | |
3627 | processing a class member access expression. */ | |
3628 | parser->context->object_type = scope; | |
3629 | /* If something went wrong, we want to be able to | |
3630 | discern that case, as opposed to the case where | |
3631 | there was no SCOPE due to the type of expression | |
3632 | being dependent. */ | |
3633 | if (!scope) | |
3634 | scope = error_mark_node; | |
3635 | } | |
3636 | ||
3637 | /* Consume the `.' or `->' operator. */ | |
3638 | cp_lexer_consume_token (parser->lexer); | |
3639 | /* If the SCOPE is not a scalar type, we are looking at an | |
3640 | ordinary class member access expression, rather than a | |
3641 | pseudo-destructor-name. */ | |
3642 | if (!scope || !SCALAR_TYPE_P (scope)) | |
3643 | { | |
3644 | template_p = cp_parser_optional_template_keyword (parser); | |
3645 | /* Parse the id-expression. */ | |
3646 | name = cp_parser_id_expression (parser, | |
3647 | template_p, | |
3648 | /*check_dependency_p=*/true, | |
f3c2dfc6 MM |
3649 | /*template_p=*/NULL, |
3650 | /*declarator_p=*/false); | |
a723baf1 MM |
3651 | /* In general, build a SCOPE_REF if the member name is |
3652 | qualified. However, if the name was not dependent | |
3653 | and has already been resolved; there is no need to | |
3654 | build the SCOPE_REF. For example; | |
3655 | ||
3656 | struct X { void f(); }; | |
3657 | template <typename T> void f(T* t) { t->X::f(); } | |
3658 | ||
d17811fd MM |
3659 | Even though "t" is dependent, "X::f" is not and has |
3660 | been resolved to a BASELINK; there is no need to | |
a723baf1 | 3661 | include scope information. */ |
a6bd211d JM |
3662 | |
3663 | /* But we do need to remember that there was an explicit | |
3664 | scope for virtual function calls. */ | |
3665 | if (parser->scope) | |
b3445994 | 3666 | idk = CP_ID_KIND_QUALIFIED; |
a6bd211d | 3667 | |
a723baf1 MM |
3668 | if (name != error_mark_node |
3669 | && !BASELINK_P (name) | |
3670 | && parser->scope) | |
3671 | { | |
3672 | name = build_nt (SCOPE_REF, parser->scope, name); | |
3673 | parser->scope = NULL_TREE; | |
3674 | parser->qualifying_scope = NULL_TREE; | |
3675 | parser->object_scope = NULL_TREE; | |
3676 | } | |
3677 | postfix_expression | |
3678 | = finish_class_member_access_expr (postfix_expression, name); | |
3679 | } | |
3680 | /* Otherwise, try the pseudo-destructor-name production. */ | |
3681 | else | |
3682 | { | |
3683 | tree s; | |
3684 | tree type; | |
3685 | ||
3686 | /* Parse the pseudo-destructor-name. */ | |
3687 | cp_parser_pseudo_destructor_name (parser, &s, &type); | |
3688 | /* Form the call. */ | |
3689 | postfix_expression | |
3690 | = finish_pseudo_destructor_expr (postfix_expression, | |
3691 | s, TREE_TYPE (type)); | |
3692 | } | |
3693 | ||
3694 | /* We no longer need to look up names in the scope of the | |
3695 | object on the left-hand side of the `.' or `->' | |
3696 | operator. */ | |
3697 | parser->context->object_type = NULL_TREE; | |
a723baf1 MM |
3698 | } |
3699 | break; | |
3700 | ||
3701 | case CPP_PLUS_PLUS: | |
3702 | /* postfix-expression ++ */ | |
3703 | /* Consume the `++' token. */ | |
3704 | cp_lexer_consume_token (parser->lexer); | |
14d22dd6 MM |
3705 | /* Increments may not appear in constant-expressions. */ |
3706 | if (parser->constant_expression_p) | |
3707 | { | |
3708 | if (!parser->allow_non_constant_expression_p) | |
3709 | return cp_parser_non_constant_expression ("an increment"); | |
3710 | parser->non_constant_expression_p = true; | |
3711 | } | |
34cd5ae7 | 3712 | /* Generate a representation for the complete expression. */ |
a723baf1 MM |
3713 | postfix_expression |
3714 | = finish_increment_expr (postfix_expression, | |
3715 | POSTINCREMENT_EXPR); | |
b3445994 | 3716 | idk = CP_ID_KIND_NONE; |
a723baf1 MM |
3717 | break; |
3718 | ||
3719 | case CPP_MINUS_MINUS: | |
3720 | /* postfix-expression -- */ | |
3721 | /* Consume the `--' token. */ | |
3722 | cp_lexer_consume_token (parser->lexer); | |
14d22dd6 MM |
3723 | /* Decrements may not appear in constant-expressions. */ |
3724 | if (parser->constant_expression_p) | |
3725 | { | |
3726 | if (!parser->allow_non_constant_expression_p) | |
3727 | return cp_parser_non_constant_expression ("a decrement"); | |
3728 | parser->non_constant_expression_p = true; | |
3729 | } | |
34cd5ae7 | 3730 | /* Generate a representation for the complete expression. */ |
a723baf1 MM |
3731 | postfix_expression |
3732 | = finish_increment_expr (postfix_expression, | |
3733 | POSTDECREMENT_EXPR); | |
b3445994 | 3734 | idk = CP_ID_KIND_NONE; |
a723baf1 MM |
3735 | break; |
3736 | ||
3737 | default: | |
3738 | return postfix_expression; | |
3739 | } | |
3740 | } | |
3741 | ||
3742 | /* We should never get here. */ | |
3743 | abort (); | |
3744 | return error_mark_node; | |
3745 | } | |
3746 | ||
7efa3e22 | 3747 | /* Parse a parenthesized expression-list. |
a723baf1 MM |
3748 | |
3749 | expression-list: | |
3750 | assignment-expression | |
3751 | expression-list, assignment-expression | |
3752 | ||
7efa3e22 NS |
3753 | attribute-list: |
3754 | expression-list | |
3755 | identifier | |
3756 | identifier, expression-list | |
3757 | ||
a723baf1 MM |
3758 | Returns a TREE_LIST. The TREE_VALUE of each node is a |
3759 | representation of an assignment-expression. Note that a TREE_LIST | |
7efa3e22 NS |
3760 | is returned even if there is only a single expression in the list. |
3761 | error_mark_node is returned if the ( and or ) are | |
3762 | missing. NULL_TREE is returned on no expressions. The parentheses | |
3763 | are eaten. IS_ATTRIBUTE_LIST is true if this is really an attribute | |
39703eb9 MM |
3764 | list being parsed. If NON_CONSTANT_P is non-NULL, *NON_CONSTANT_P |
3765 | indicates whether or not all of the expressions in the list were | |
3766 | constant. */ | |
a723baf1 MM |
3767 | |
3768 | static tree | |
39703eb9 MM |
3769 | cp_parser_parenthesized_expression_list (cp_parser* parser, |
3770 | bool is_attribute_list, | |
3771 | bool *non_constant_p) | |
a723baf1 MM |
3772 | { |
3773 | tree expression_list = NULL_TREE; | |
7efa3e22 | 3774 | tree identifier = NULL_TREE; |
39703eb9 MM |
3775 | |
3776 | /* Assume all the expressions will be constant. */ | |
3777 | if (non_constant_p) | |
3778 | *non_constant_p = false; | |
3779 | ||
7efa3e22 NS |
3780 | if (!cp_parser_require (parser, CPP_OPEN_PAREN, "`('")) |
3781 | return error_mark_node; | |
3782 | ||
a723baf1 | 3783 | /* Consume expressions until there are no more. */ |
7efa3e22 NS |
3784 | if (cp_lexer_next_token_is_not (parser->lexer, CPP_CLOSE_PAREN)) |
3785 | while (true) | |
3786 | { | |
3787 | tree expr; | |
3788 | ||
3789 | /* At the beginning of attribute lists, check to see if the | |
3790 | next token is an identifier. */ | |
3791 | if (is_attribute_list | |
3792 | && cp_lexer_peek_token (parser->lexer)->type == CPP_NAME) | |
3793 | { | |
3794 | cp_token *token; | |
3795 | ||
3796 | /* Consume the identifier. */ | |
3797 | token = cp_lexer_consume_token (parser->lexer); | |
3798 | /* Save the identifier. */ | |
3799 | identifier = token->value; | |
3800 | } | |
3801 | else | |
3802 | { | |
3803 | /* Parse the next assignment-expression. */ | |
39703eb9 MM |
3804 | if (non_constant_p) |
3805 | { | |
3806 | bool expr_non_constant_p; | |
3807 | expr = (cp_parser_constant_expression | |
3808 | (parser, /*allow_non_constant_p=*/true, | |
3809 | &expr_non_constant_p)); | |
3810 | if (expr_non_constant_p) | |
3811 | *non_constant_p = true; | |
3812 | } | |
3813 | else | |
3814 | expr = cp_parser_assignment_expression (parser); | |
a723baf1 | 3815 | |
7efa3e22 NS |
3816 | /* Add it to the list. We add error_mark_node |
3817 | expressions to the list, so that we can still tell if | |
3818 | the correct form for a parenthesized expression-list | |
3819 | is found. That gives better errors. */ | |
3820 | expression_list = tree_cons (NULL_TREE, expr, expression_list); | |
a723baf1 | 3821 | |
7efa3e22 NS |
3822 | if (expr == error_mark_node) |
3823 | goto skip_comma; | |
3824 | } | |
a723baf1 | 3825 | |
7efa3e22 NS |
3826 | /* After the first item, attribute lists look the same as |
3827 | expression lists. */ | |
3828 | is_attribute_list = false; | |
3829 | ||
3830 | get_comma:; | |
3831 | /* If the next token isn't a `,', then we are done. */ | |
3832 | if (cp_lexer_next_token_is_not (parser->lexer, CPP_COMMA)) | |
3833 | break; | |
3834 | ||
3835 | /* Otherwise, consume the `,' and keep going. */ | |
3836 | cp_lexer_consume_token (parser->lexer); | |
3837 | } | |
3838 | ||
3839 | if (!cp_parser_require (parser, CPP_CLOSE_PAREN, "`)'")) | |
3840 | { | |
3841 | int ending; | |
3842 | ||
3843 | skip_comma:; | |
3844 | /* We try and resync to an unnested comma, as that will give the | |
3845 | user better diagnostics. */ | |
3846 | ending = cp_parser_skip_to_closing_parenthesis (parser, true, true); | |
3847 | if (ending < 0) | |
3848 | goto get_comma; | |
3849 | if (!ending) | |
3850 | return error_mark_node; | |
a723baf1 MM |
3851 | } |
3852 | ||
3853 | /* We built up the list in reverse order so we must reverse it now. */ | |
7efa3e22 NS |
3854 | expression_list = nreverse (expression_list); |
3855 | if (identifier) | |
3856 | expression_list = tree_cons (NULL_TREE, identifier, expression_list); | |
3857 | ||
3858 | return expression_list; | |
a723baf1 MM |
3859 | } |
3860 | ||
3861 | /* Parse a pseudo-destructor-name. | |
3862 | ||
3863 | pseudo-destructor-name: | |
3864 | :: [opt] nested-name-specifier [opt] type-name :: ~ type-name | |
3865 | :: [opt] nested-name-specifier template template-id :: ~ type-name | |
3866 | :: [opt] nested-name-specifier [opt] ~ type-name | |
3867 | ||
3868 | If either of the first two productions is used, sets *SCOPE to the | |
3869 | TYPE specified before the final `::'. Otherwise, *SCOPE is set to | |
3870 | NULL_TREE. *TYPE is set to the TYPE_DECL for the final type-name, | |
3871 | or ERROR_MARK_NODE if no type-name is present. */ | |
3872 | ||
3873 | static void | |
94edc4ab NN |
3874 | cp_parser_pseudo_destructor_name (cp_parser* parser, |
3875 | tree* scope, | |
3876 | tree* type) | |
a723baf1 MM |
3877 | { |
3878 | bool nested_name_specifier_p; | |
3879 | ||
3880 | /* Look for the optional `::' operator. */ | |
3881 | cp_parser_global_scope_opt (parser, /*current_scope_valid_p=*/true); | |
3882 | /* Look for the optional nested-name-specifier. */ | |
3883 | nested_name_specifier_p | |
3884 | = (cp_parser_nested_name_specifier_opt (parser, | |
3885 | /*typename_keyword_p=*/false, | |
3886 | /*check_dependency_p=*/true, | |
3887 | /*type_p=*/false) | |
3888 | != NULL_TREE); | |
3889 | /* Now, if we saw a nested-name-specifier, we might be doing the | |
3890 | second production. */ | |
3891 | if (nested_name_specifier_p | |
3892 | && cp_lexer_next_token_is_keyword (parser->lexer, RID_TEMPLATE)) | |
3893 | { | |
3894 | /* Consume the `template' keyword. */ | |
3895 | cp_lexer_consume_token (parser->lexer); | |
3896 | /* Parse the template-id. */ | |
3897 | cp_parser_template_id (parser, | |
3898 | /*template_keyword_p=*/true, | |
3899 | /*check_dependency_p=*/false); | |
3900 | /* Look for the `::' token. */ | |
3901 | cp_parser_require (parser, CPP_SCOPE, "`::'"); | |
3902 | } | |
3903 | /* If the next token is not a `~', then there might be some | |
9bcb9aae | 3904 | additional qualification. */ |
a723baf1 MM |
3905 | else if (cp_lexer_next_token_is_not (parser->lexer, CPP_COMPL)) |
3906 | { | |
3907 | /* Look for the type-name. */ | |
3908 | *scope = TREE_TYPE (cp_parser_type_name (parser)); | |
3909 | /* Look for the `::' token. */ | |
3910 | cp_parser_require (parser, CPP_SCOPE, "`::'"); | |
3911 | } | |
3912 | else | |
3913 | *scope = NULL_TREE; | |
3914 | ||
3915 | /* Look for the `~'. */ | |
3916 | cp_parser_require (parser, CPP_COMPL, "`~'"); | |
3917 | /* Look for the type-name again. We are not responsible for | |
3918 | checking that it matches the first type-name. */ | |
3919 | *type = cp_parser_type_name (parser); | |
3920 | } | |
3921 | ||
3922 | /* Parse a unary-expression. | |
3923 | ||
3924 | unary-expression: | |
3925 | postfix-expression | |
3926 | ++ cast-expression | |
3927 | -- cast-expression | |
3928 | unary-operator cast-expression | |
3929 | sizeof unary-expression | |
3930 | sizeof ( type-id ) | |
3931 | new-expression | |
3932 | delete-expression | |
3933 | ||
3934 | GNU Extensions: | |
3935 | ||
3936 | unary-expression: | |
3937 | __extension__ cast-expression | |
3938 | __alignof__ unary-expression | |
3939 | __alignof__ ( type-id ) | |
3940 | __real__ cast-expression | |
3941 | __imag__ cast-expression | |
3942 | && identifier | |
3943 | ||
3944 | ADDRESS_P is true iff the unary-expression is appearing as the | |
3945 | operand of the `&' operator. | |
3946 | ||
34cd5ae7 | 3947 | Returns a representation of the expression. */ |
a723baf1 MM |
3948 | |
3949 | static tree | |
3950 | cp_parser_unary_expression (cp_parser *parser, bool address_p) | |
3951 | { | |
3952 | cp_token *token; | |
3953 | enum tree_code unary_operator; | |
3954 | ||
3955 | /* Peek at the next token. */ | |
3956 | token = cp_lexer_peek_token (parser->lexer); | |
3957 | /* Some keywords give away the kind of expression. */ | |
3958 | if (token->type == CPP_KEYWORD) | |
3959 | { | |
3960 | enum rid keyword = token->keyword; | |
3961 | ||
3962 | switch (keyword) | |
3963 | { | |
3964 | case RID_ALIGNOF: | |
3965 | { | |
3966 | /* Consume the `alignof' token. */ | |
3967 | cp_lexer_consume_token (parser->lexer); | |
3968 | /* Parse the operand. */ | |
3969 | return finish_alignof (cp_parser_sizeof_operand | |
3970 | (parser, keyword)); | |
3971 | } | |
3972 | ||
3973 | case RID_SIZEOF: | |
3974 | { | |
3975 | tree operand; | |
3976 | ||
9bcb9aae | 3977 | /* Consume the `sizeof' token. */ |
a723baf1 MM |
3978 | cp_lexer_consume_token (parser->lexer); |
3979 | /* Parse the operand. */ | |
3980 | operand = cp_parser_sizeof_operand (parser, keyword); | |
3981 | ||
3982 | /* If the type of the operand cannot be determined build a | |
3983 | SIZEOF_EXPR. */ | |
3984 | if (TYPE_P (operand) | |
1fb3244a MM |
3985 | ? dependent_type_p (operand) |
3986 | : type_dependent_expression_p (operand)) | |
a723baf1 MM |
3987 | return build_min (SIZEOF_EXPR, size_type_node, operand); |
3988 | /* Otherwise, compute the constant value. */ | |
3989 | else | |
3990 | return finish_sizeof (operand); | |
3991 | } | |
3992 | ||
3993 | case RID_NEW: | |
3994 | return cp_parser_new_expression (parser); | |
3995 | ||
3996 | case RID_DELETE: | |
3997 | return cp_parser_delete_expression (parser); | |
3998 | ||
3999 | case RID_EXTENSION: | |
4000 | { | |
4001 | /* The saved value of the PEDANTIC flag. */ | |
4002 | int saved_pedantic; | |
4003 | tree expr; | |
4004 | ||
4005 | /* Save away the PEDANTIC flag. */ | |
4006 | cp_parser_extension_opt (parser, &saved_pedantic); | |
4007 | /* Parse the cast-expression. */ | |
d6b4ea85 | 4008 | expr = cp_parser_simple_cast_expression (parser); |
a723baf1 MM |
4009 | /* Restore the PEDANTIC flag. */ |
4010 | pedantic = saved_pedantic; | |
4011 | ||
4012 | return expr; | |
4013 | } | |
4014 | ||
4015 | case RID_REALPART: | |
4016 | case RID_IMAGPART: | |
4017 | { | |
4018 | tree expression; | |
4019 | ||
4020 | /* Consume the `__real__' or `__imag__' token. */ | |
4021 | cp_lexer_consume_token (parser->lexer); | |
4022 | /* Parse the cast-expression. */ | |
d6b4ea85 | 4023 | expression = cp_parser_simple_cast_expression (parser); |
a723baf1 MM |
4024 | /* Create the complete representation. */ |
4025 | return build_x_unary_op ((keyword == RID_REALPART | |
4026 | ? REALPART_EXPR : IMAGPART_EXPR), | |
4027 | expression); | |
4028 | } | |
4029 | break; | |
4030 | ||
4031 | default: | |
4032 | break; | |
4033 | } | |
4034 | } | |
4035 | ||
4036 | /* Look for the `:: new' and `:: delete', which also signal the | |
4037 | beginning of a new-expression, or delete-expression, | |
4038 | respectively. If the next token is `::', then it might be one of | |
4039 | these. */ | |
4040 | if (cp_lexer_next_token_is (parser->lexer, CPP_SCOPE)) | |
4041 | { | |
4042 | enum rid keyword; | |
4043 | ||
4044 | /* See if the token after the `::' is one of the keywords in | |
4045 | which we're interested. */ | |
4046 | keyword = cp_lexer_peek_nth_token (parser->lexer, 2)->keyword; | |
4047 | /* If it's `new', we have a new-expression. */ | |
4048 | if (keyword == RID_NEW) | |
4049 | return cp_parser_new_expression (parser); | |
4050 | /* Similarly, for `delete'. */ | |
4051 | else if (keyword == RID_DELETE) | |
4052 | return cp_parser_delete_expression (parser); | |
4053 | } | |
4054 | ||
4055 | /* Look for a unary operator. */ | |
4056 | unary_operator = cp_parser_unary_operator (token); | |
4057 | /* The `++' and `--' operators can be handled similarly, even though | |
4058 | they are not technically unary-operators in the grammar. */ | |
4059 | if (unary_operator == ERROR_MARK) | |
4060 | { | |
4061 | if (token->type == CPP_PLUS_PLUS) | |
4062 | unary_operator = PREINCREMENT_EXPR; | |
4063 | else if (token->type == CPP_MINUS_MINUS) | |
4064 | unary_operator = PREDECREMENT_EXPR; | |
4065 | /* Handle the GNU address-of-label extension. */ | |
4066 | else if (cp_parser_allow_gnu_extensions_p (parser) | |
4067 | && token->type == CPP_AND_AND) | |
4068 | { | |
4069 | tree identifier; | |
4070 | ||
4071 | /* Consume the '&&' token. */ | |
4072 | cp_lexer_consume_token (parser->lexer); | |
4073 | /* Look for the identifier. */ | |
4074 | identifier = cp_parser_identifier (parser); | |
4075 | /* Create an expression representing the address. */ | |
4076 | return finish_label_address_expr (identifier); | |
4077 | } | |
4078 | } | |
4079 | if (unary_operator != ERROR_MARK) | |
4080 | { | |
4081 | tree cast_expression; | |
4082 | ||
4083 | /* Consume the operator token. */ | |
4084 | token = cp_lexer_consume_token (parser->lexer); | |
4085 | /* Parse the cast-expression. */ | |
4086 | cast_expression | |
4087 | = cp_parser_cast_expression (parser, unary_operator == ADDR_EXPR); | |
4088 | /* Now, build an appropriate representation. */ | |
4089 | switch (unary_operator) | |
4090 | { | |
4091 | case INDIRECT_REF: | |
4092 | return build_x_indirect_ref (cast_expression, "unary *"); | |
4093 | ||
4094 | case ADDR_EXPR: | |
d17811fd MM |
4095 | case BIT_NOT_EXPR: |
4096 | return build_x_unary_op (unary_operator, cast_expression); | |
a723baf1 | 4097 | |
14d22dd6 MM |
4098 | case PREINCREMENT_EXPR: |
4099 | case PREDECREMENT_EXPR: | |
4100 | if (parser->constant_expression_p) | |
4101 | { | |
4102 | if (!parser->allow_non_constant_expression_p) | |
4103 | return cp_parser_non_constant_expression (PREINCREMENT_EXPR | |
4104 | ? "an increment" | |
4105 | : "a decrement"); | |
4106 | parser->non_constant_expression_p = true; | |
4107 | } | |
4108 | /* Fall through. */ | |
a723baf1 MM |
4109 | case CONVERT_EXPR: |
4110 | case NEGATE_EXPR: | |
4111 | case TRUTH_NOT_EXPR: | |
a723baf1 MM |
4112 | return finish_unary_op_expr (unary_operator, cast_expression); |
4113 | ||
a723baf1 MM |
4114 | default: |
4115 | abort (); | |
4116 | return error_mark_node; | |
4117 | } | |
4118 | } | |
4119 | ||
4120 | return cp_parser_postfix_expression (parser, address_p); | |
4121 | } | |
4122 | ||
4123 | /* Returns ERROR_MARK if TOKEN is not a unary-operator. If TOKEN is a | |
4124 | unary-operator, the corresponding tree code is returned. */ | |
4125 | ||
4126 | static enum tree_code | |
94edc4ab | 4127 | cp_parser_unary_operator (cp_token* token) |
a723baf1 MM |
4128 | { |
4129 | switch (token->type) | |
4130 | { | |
4131 | case CPP_MULT: | |
4132 | return INDIRECT_REF; | |
4133 | ||
4134 | case CPP_AND: | |
4135 | return ADDR_EXPR; | |
4136 | ||
4137 | case CPP_PLUS: | |
4138 | return CONVERT_EXPR; | |
4139 | ||
4140 | case CPP_MINUS: | |
4141 | return NEGATE_EXPR; | |
4142 | ||
4143 | case CPP_NOT: | |
4144 | return TRUTH_NOT_EXPR; | |
4145 | ||
4146 | case CPP_COMPL: | |
4147 | return BIT_NOT_EXPR; | |
4148 | ||
4149 | default: | |
4150 | return ERROR_MARK; | |
4151 | } | |
4152 | } | |
4153 | ||
4154 | /* Parse a new-expression. | |
4155 | ||
ca099ac8 | 4156 | new-expression: |
a723baf1 MM |
4157 | :: [opt] new new-placement [opt] new-type-id new-initializer [opt] |
4158 | :: [opt] new new-placement [opt] ( type-id ) new-initializer [opt] | |
4159 | ||
4160 | Returns a representation of the expression. */ | |
4161 | ||
4162 | static tree | |
94edc4ab | 4163 | cp_parser_new_expression (cp_parser* parser) |
a723baf1 MM |
4164 | { |
4165 | bool global_scope_p; | |
4166 | tree placement; | |
4167 | tree type; | |
4168 | tree initializer; | |
4169 | ||
4170 | /* Look for the optional `::' operator. */ | |
4171 | global_scope_p | |
4172 | = (cp_parser_global_scope_opt (parser, | |
4173 | /*current_scope_valid_p=*/false) | |
4174 | != NULL_TREE); | |
4175 | /* Look for the `new' operator. */ | |
4176 | cp_parser_require_keyword (parser, RID_NEW, "`new'"); | |
4177 | /* There's no easy way to tell a new-placement from the | |
4178 | `( type-id )' construct. */ | |
4179 | cp_parser_parse_tentatively (parser); | |
4180 | /* Look for a new-placement. */ | |
4181 | placement = cp_parser_new_placement (parser); | |
4182 | /* If that didn't work out, there's no new-placement. */ | |
4183 | if (!cp_parser_parse_definitely (parser)) | |
4184 | placement = NULL_TREE; | |
4185 | ||
4186 | /* If the next token is a `(', then we have a parenthesized | |
4187 | type-id. */ | |
4188 | if (cp_lexer_next_token_is (parser->lexer, CPP_OPEN_PAREN)) | |
4189 | { | |
4190 | /* Consume the `('. */ | |
4191 | cp_lexer_consume_token (parser->lexer); | |
4192 | /* Parse the type-id. */ | |
4193 | type = cp_parser_type_id (parser); | |
4194 | /* Look for the closing `)'. */ | |
4195 | cp_parser_require (parser, CPP_CLOSE_PAREN, "`)'"); | |
4196 | } | |
4197 | /* Otherwise, there must be a new-type-id. */ | |
4198 | else | |
4199 | type = cp_parser_new_type_id (parser); | |
4200 | ||
4201 | /* If the next token is a `(', then we have a new-initializer. */ | |
4202 | if (cp_lexer_next_token_is (parser->lexer, CPP_OPEN_PAREN)) | |
4203 | initializer = cp_parser_new_initializer (parser); | |
4204 | else | |
4205 | initializer = NULL_TREE; | |
4206 | ||
4207 | /* Create a representation of the new-expression. */ | |
4208 | return build_new (placement, type, initializer, global_scope_p); | |
4209 | } | |
4210 | ||
4211 | /* Parse a new-placement. | |
4212 | ||
4213 | new-placement: | |
4214 | ( expression-list ) | |
4215 | ||
4216 | Returns the same representation as for an expression-list. */ | |
4217 | ||
4218 | static tree | |
94edc4ab | 4219 | cp_parser_new_placement (cp_parser* parser) |
a723baf1 MM |
4220 | { |
4221 | tree expression_list; | |
4222 | ||
a723baf1 | 4223 | /* Parse the expression-list. */ |
39703eb9 MM |
4224 | expression_list = (cp_parser_parenthesized_expression_list |
4225 | (parser, false, /*non_constant_p=*/NULL)); | |
a723baf1 MM |
4226 | |
4227 | return expression_list; | |
4228 | } | |
4229 | ||
4230 | /* Parse a new-type-id. | |
4231 | ||
4232 | new-type-id: | |
4233 | type-specifier-seq new-declarator [opt] | |
4234 | ||
4235 | Returns a TREE_LIST whose TREE_PURPOSE is the type-specifier-seq, | |
4236 | and whose TREE_VALUE is the new-declarator. */ | |
4237 | ||
4238 | static tree | |
94edc4ab | 4239 | cp_parser_new_type_id (cp_parser* parser) |
a723baf1 MM |
4240 | { |
4241 | tree type_specifier_seq; | |
4242 | tree declarator; | |
4243 | const char *saved_message; | |
4244 | ||
4245 | /* The type-specifier sequence must not contain type definitions. | |
4246 | (It cannot contain declarations of new types either, but if they | |
4247 | are not definitions we will catch that because they are not | |
4248 | complete.) */ | |
4249 | saved_message = parser->type_definition_forbidden_message; | |
4250 | parser->type_definition_forbidden_message | |
4251 | = "types may not be defined in a new-type-id"; | |
4252 | /* Parse the type-specifier-seq. */ | |
4253 | type_specifier_seq = cp_parser_type_specifier_seq (parser); | |
4254 | /* Restore the old message. */ | |
4255 | parser->type_definition_forbidden_message = saved_message; | |
4256 | /* Parse the new-declarator. */ | |
4257 | declarator = cp_parser_new_declarator_opt (parser); | |
4258 | ||
4259 | return build_tree_list (type_specifier_seq, declarator); | |
4260 | } | |
4261 | ||
4262 | /* Parse an (optional) new-declarator. | |
4263 | ||
4264 | new-declarator: | |
4265 | ptr-operator new-declarator [opt] | |
4266 | direct-new-declarator | |
4267 | ||
4268 | Returns a representation of the declarator. See | |
4269 | cp_parser_declarator for the representations used. */ | |
4270 | ||
4271 | static tree | |
94edc4ab | 4272 | cp_parser_new_declarator_opt (cp_parser* parser) |
a723baf1 MM |
4273 | { |
4274 | enum tree_code code; | |
4275 | tree type; | |
4276 | tree cv_qualifier_seq; | |
4277 | ||
4278 | /* We don't know if there's a ptr-operator next, or not. */ | |
4279 | cp_parser_parse_tentatively (parser); | |
4280 | /* Look for a ptr-operator. */ | |
4281 | code = cp_parser_ptr_operator (parser, &type, &cv_qualifier_seq); | |
4282 | /* If that worked, look for more new-declarators. */ | |
4283 | if (cp_parser_parse_definitely (parser)) | |
4284 | { | |
4285 | tree declarator; | |
4286 | ||
4287 | /* Parse another optional declarator. */ | |
4288 | declarator = cp_parser_new_declarator_opt (parser); | |
4289 | ||
4290 | /* Create the representation of the declarator. */ | |
4291 | if (code == INDIRECT_REF) | |
4292 | declarator = make_pointer_declarator (cv_qualifier_seq, | |
4293 | declarator); | |
4294 | else | |
4295 | declarator = make_reference_declarator (cv_qualifier_seq, | |
4296 | declarator); | |
4297 | ||
4298 | /* Handle the pointer-to-member case. */ | |
4299 | if (type) | |
4300 | declarator = build_nt (SCOPE_REF, type, declarator); | |
4301 | ||
4302 | return declarator; | |
4303 | } | |
4304 | ||
4305 | /* If the next token is a `[', there is a direct-new-declarator. */ | |
4306 | if (cp_lexer_next_token_is (parser->lexer, CPP_OPEN_SQUARE)) | |
4307 | return cp_parser_direct_new_declarator (parser); | |
4308 | ||
4309 | return NULL_TREE; | |
4310 | } | |
4311 | ||
4312 | /* Parse a direct-new-declarator. | |
4313 | ||
4314 | direct-new-declarator: | |
4315 | [ expression ] | |
4316 | direct-new-declarator [constant-expression] | |
4317 | ||
4318 | Returns an ARRAY_REF, following the same conventions as are | |
4319 | documented for cp_parser_direct_declarator. */ | |
4320 | ||
4321 | static tree | |
94edc4ab | 4322 | cp_parser_direct_new_declarator (cp_parser* parser) |
a723baf1 MM |
4323 | { |
4324 | tree declarator = NULL_TREE; | |
4325 | ||
4326 | while (true) | |
4327 | { | |
4328 | tree expression; | |
4329 | ||
4330 | /* Look for the opening `['. */ | |
4331 | cp_parser_require (parser, CPP_OPEN_SQUARE, "`['"); | |
4332 | /* The first expression is not required to be constant. */ | |
4333 | if (!declarator) | |
4334 | { | |
4335 | expression = cp_parser_expression (parser); | |
4336 | /* The standard requires that the expression have integral | |
4337 | type. DR 74 adds enumeration types. We believe that the | |
4338 | real intent is that these expressions be handled like the | |
4339 | expression in a `switch' condition, which also allows | |
4340 | classes with a single conversion to integral or | |
4341 | enumeration type. */ | |
4342 | if (!processing_template_decl) | |
4343 | { | |
4344 | expression | |
4345 | = build_expr_type_conversion (WANT_INT | WANT_ENUM, | |
4346 | expression, | |
b746c5dc | 4347 | /*complain=*/true); |
a723baf1 MM |
4348 | if (!expression) |
4349 | { | |
4350 | error ("expression in new-declarator must have integral or enumeration type"); | |
4351 | expression = error_mark_node; | |
4352 | } | |
4353 | } | |
4354 | } | |
4355 | /* But all the other expressions must be. */ | |
4356 | else | |
14d22dd6 MM |
4357 | expression |
4358 | = cp_parser_constant_expression (parser, | |
4359 | /*allow_non_constant=*/false, | |
4360 | NULL); | |
a723baf1 MM |
4361 | /* Look for the closing `]'. */ |
4362 | cp_parser_require (parser, CPP_CLOSE_SQUARE, "`]'"); | |
4363 | ||
4364 | /* Add this bound to the declarator. */ | |
4365 | declarator = build_nt (ARRAY_REF, declarator, expression); | |
4366 | ||
4367 | /* If the next token is not a `[', then there are no more | |
4368 | bounds. */ | |
4369 | if (cp_lexer_next_token_is_not (parser->lexer, CPP_OPEN_SQUARE)) | |
4370 | break; | |
4371 | } | |
4372 | ||
4373 | return declarator; | |
4374 | } | |
4375 | ||
4376 | /* Parse a new-initializer. | |
4377 | ||
4378 | new-initializer: | |
4379 | ( expression-list [opt] ) | |
4380 | ||
34cd5ae7 | 4381 | Returns a representation of the expression-list. If there is no |
a723baf1 MM |
4382 | expression-list, VOID_ZERO_NODE is returned. */ |
4383 | ||
4384 | static tree | |
94edc4ab | 4385 | cp_parser_new_initializer (cp_parser* parser) |
a723baf1 MM |
4386 | { |
4387 | tree expression_list; | |
4388 | ||
39703eb9 MM |
4389 | expression_list = (cp_parser_parenthesized_expression_list |
4390 | (parser, false, /*non_constant_p=*/NULL)); | |
7efa3e22 | 4391 | if (!expression_list) |
a723baf1 | 4392 | expression_list = void_zero_node; |
a723baf1 MM |
4393 | |
4394 | return expression_list; | |
4395 | } | |
4396 | ||
4397 | /* Parse a delete-expression. | |
4398 | ||
4399 | delete-expression: | |
4400 | :: [opt] delete cast-expression | |
4401 | :: [opt] delete [ ] cast-expression | |
4402 | ||
4403 | Returns a representation of the expression. */ | |
4404 | ||
4405 | static tree | |
94edc4ab | 4406 | cp_parser_delete_expression (cp_parser* parser) |
a723baf1 MM |
4407 | { |
4408 | bool global_scope_p; | |
4409 | bool array_p; | |
4410 | tree expression; | |
4411 | ||
4412 | /* Look for the optional `::' operator. */ | |
4413 | global_scope_p | |
4414 | = (cp_parser_global_scope_opt (parser, | |
4415 | /*current_scope_valid_p=*/false) | |
4416 | != NULL_TREE); | |
4417 | /* Look for the `delete' keyword. */ | |
4418 | cp_parser_require_keyword (parser, RID_DELETE, "`delete'"); | |
4419 | /* See if the array syntax is in use. */ | |
4420 | if (cp_lexer_next_token_is (parser->lexer, CPP_OPEN_SQUARE)) | |
4421 | { | |
4422 | /* Consume the `[' token. */ | |
4423 | cp_lexer_consume_token (parser->lexer); | |
4424 | /* Look for the `]' token. */ | |
4425 | cp_parser_require (parser, CPP_CLOSE_SQUARE, "`]'"); | |
4426 | /* Remember that this is the `[]' construct. */ | |
4427 | array_p = true; | |
4428 | } | |
4429 | else | |
4430 | array_p = false; | |
4431 | ||
4432 | /* Parse the cast-expression. */ | |
d6b4ea85 | 4433 | expression = cp_parser_simple_cast_expression (parser); |
a723baf1 MM |
4434 | |
4435 | return delete_sanity (expression, NULL_TREE, array_p, global_scope_p); | |
4436 | } | |
4437 | ||
4438 | /* Parse a cast-expression. | |
4439 | ||
4440 | cast-expression: | |
4441 | unary-expression | |
4442 | ( type-id ) cast-expression | |
4443 | ||
4444 | Returns a representation of the expression. */ | |
4445 | ||
4446 | static tree | |
4447 | cp_parser_cast_expression (cp_parser *parser, bool address_p) | |
4448 | { | |
4449 | /* If it's a `(', then we might be looking at a cast. */ | |
4450 | if (cp_lexer_next_token_is (parser->lexer, CPP_OPEN_PAREN)) | |
4451 | { | |
4452 | tree type = NULL_TREE; | |
4453 | tree expr = NULL_TREE; | |
4454 | bool compound_literal_p; | |
4455 | const char *saved_message; | |
4456 | ||
4457 | /* There's no way to know yet whether or not this is a cast. | |
4458 | For example, `(int (3))' is a unary-expression, while `(int) | |
4459 | 3' is a cast. So, we resort to parsing tentatively. */ | |
4460 | cp_parser_parse_tentatively (parser); | |
4461 | /* Types may not be defined in a cast. */ | |
4462 | saved_message = parser->type_definition_forbidden_message; | |
4463 | parser->type_definition_forbidden_message | |
4464 | = "types may not be defined in casts"; | |
4465 | /* Consume the `('. */ | |
4466 | cp_lexer_consume_token (parser->lexer); | |
4467 | /* A very tricky bit is that `(struct S) { 3 }' is a | |
4468 | compound-literal (which we permit in C++ as an extension). | |
4469 | But, that construct is not a cast-expression -- it is a | |
4470 | postfix-expression. (The reason is that `(struct S) { 3 }.i' | |
4471 | is legal; if the compound-literal were a cast-expression, | |
4472 | you'd need an extra set of parentheses.) But, if we parse | |
4473 | the type-id, and it happens to be a class-specifier, then we | |
4474 | will commit to the parse at that point, because we cannot | |
4475 | undo the action that is done when creating a new class. So, | |
4476 | then we cannot back up and do a postfix-expression. | |
4477 | ||
4478 | Therefore, we scan ahead to the closing `)', and check to see | |
4479 | if the token after the `)' is a `{'. If so, we are not | |
4480 | looking at a cast-expression. | |
4481 | ||
4482 | Save tokens so that we can put them back. */ | |
4483 | cp_lexer_save_tokens (parser->lexer); | |
4484 | /* Skip tokens until the next token is a closing parenthesis. | |
4485 | If we find the closing `)', and the next token is a `{', then | |
4486 | we are looking at a compound-literal. */ | |
4487 | compound_literal_p | |
7efa3e22 | 4488 | = (cp_parser_skip_to_closing_parenthesis (parser, false, false) |
a723baf1 MM |
4489 | && cp_lexer_next_token_is (parser->lexer, CPP_OPEN_BRACE)); |
4490 | /* Roll back the tokens we skipped. */ | |
4491 | cp_lexer_rollback_tokens (parser->lexer); | |
4492 | /* If we were looking at a compound-literal, simulate an error | |
4493 | so that the call to cp_parser_parse_definitely below will | |
4494 | fail. */ | |
4495 | if (compound_literal_p) | |
4496 | cp_parser_simulate_error (parser); | |
4497 | else | |
4498 | { | |
4499 | /* Look for the type-id. */ | |
4500 | type = cp_parser_type_id (parser); | |
4501 | /* Look for the closing `)'. */ | |
4502 | cp_parser_require (parser, CPP_CLOSE_PAREN, "`)'"); | |
4503 | } | |
4504 | ||
4505 | /* Restore the saved message. */ | |
4506 | parser->type_definition_forbidden_message = saved_message; | |
4507 | ||
bbaab916 NS |
4508 | /* If ok so far, parse the dependent expression. We cannot be |
4509 | sure it is a cast. Consider `(T ())'. It is a parenthesized | |
4510 | ctor of T, but looks like a cast to function returning T | |
4511 | without a dependent expression. */ | |
4512 | if (!cp_parser_error_occurred (parser)) | |
d6b4ea85 | 4513 | expr = cp_parser_simple_cast_expression (parser); |
bbaab916 | 4514 | |
a723baf1 MM |
4515 | if (cp_parser_parse_definitely (parser)) |
4516 | { | |
a723baf1 MM |
4517 | /* Warn about old-style casts, if so requested. */ |
4518 | if (warn_old_style_cast | |
4519 | && !in_system_header | |
4520 | && !VOID_TYPE_P (type) | |
4521 | && current_lang_name != lang_name_c) | |
4522 | warning ("use of old-style cast"); | |
14d22dd6 MM |
4523 | |
4524 | /* Only type conversions to integral or enumeration types | |
4525 | can be used in constant-expressions. */ | |
4526 | if (parser->constant_expression_p | |
4527 | && !dependent_type_p (type) | |
4528 | && !INTEGRAL_OR_ENUMERATION_TYPE_P (type)) | |
4529 | { | |
4530 | if (!parser->allow_non_constant_expression_p) | |
4531 | return (cp_parser_non_constant_expression | |
4532 | ("a casts to a type other than an integral or " | |
4533 | "enumeration type")); | |
4534 | parser->non_constant_expression_p = true; | |
4535 | } | |
a723baf1 MM |
4536 | /* Perform the cast. */ |
4537 | expr = build_c_cast (type, expr); | |
bbaab916 | 4538 | return expr; |
a723baf1 | 4539 | } |
a723baf1 MM |
4540 | } |
4541 | ||
4542 | /* If we get here, then it's not a cast, so it must be a | |
4543 | unary-expression. */ | |
4544 | return cp_parser_unary_expression (parser, address_p); | |
4545 | } | |
4546 | ||
4547 | /* Parse a pm-expression. | |
4548 | ||
4549 | pm-expression: | |
4550 | cast-expression | |
4551 | pm-expression .* cast-expression | |
4552 | pm-expression ->* cast-expression | |
4553 | ||
4554 | Returns a representation of the expression. */ | |
4555 | ||
4556 | static tree | |
94edc4ab | 4557 | cp_parser_pm_expression (cp_parser* parser) |
a723baf1 | 4558 | { |
d6b4ea85 MM |
4559 | static const cp_parser_token_tree_map map = { |
4560 | { CPP_DEREF_STAR, MEMBER_REF }, | |
4561 | { CPP_DOT_STAR, DOTSTAR_EXPR }, | |
4562 | { CPP_EOF, ERROR_MARK } | |
4563 | }; | |
a723baf1 | 4564 | |
d6b4ea85 MM |
4565 | return cp_parser_binary_expression (parser, map, |
4566 | cp_parser_simple_cast_expression); | |
a723baf1 MM |
4567 | } |
4568 | ||
4569 | /* Parse a multiplicative-expression. | |
4570 | ||
4571 | mulitplicative-expression: | |
4572 | pm-expression | |
4573 | multiplicative-expression * pm-expression | |
4574 | multiplicative-expression / pm-expression | |
4575 | multiplicative-expression % pm-expression | |
4576 | ||
4577 | Returns a representation of the expression. */ | |
4578 | ||
4579 | static tree | |
94edc4ab | 4580 | cp_parser_multiplicative_expression (cp_parser* parser) |
a723baf1 | 4581 | { |
39b1af70 | 4582 | static const cp_parser_token_tree_map map = { |
a723baf1 MM |
4583 | { CPP_MULT, MULT_EXPR }, |
4584 | { CPP_DIV, TRUNC_DIV_EXPR }, | |
4585 | { CPP_MOD, TRUNC_MOD_EXPR }, | |
4586 | { CPP_EOF, ERROR_MARK } | |
4587 | }; | |
4588 | ||
4589 | return cp_parser_binary_expression (parser, | |
4590 | map, | |
4591 | cp_parser_pm_expression); | |
4592 | } | |
4593 | ||
4594 | /* Parse an additive-expression. | |
4595 | ||
4596 | additive-expression: | |
4597 | multiplicative-expression | |
4598 | additive-expression + multiplicative-expression | |
4599 | additive-expression - multiplicative-expression | |
4600 | ||
4601 | Returns a representation of the expression. */ | |
4602 | ||
4603 | static tree | |
94edc4ab | 4604 | cp_parser_additive_expression (cp_parser* parser) |
a723baf1 | 4605 | { |
39b1af70 | 4606 | static const cp_parser_token_tree_map map = { |
a723baf1 MM |
4607 | { CPP_PLUS, PLUS_EXPR }, |
4608 | { CPP_MINUS, MINUS_EXPR }, | |
4609 | { CPP_EOF, ERROR_MARK } | |
4610 | }; | |
4611 | ||
4612 | return cp_parser_binary_expression (parser, | |
4613 | map, | |
4614 | cp_parser_multiplicative_expression); | |
4615 | } | |
4616 | ||
4617 | /* Parse a shift-expression. | |
4618 | ||
4619 | shift-expression: | |
4620 | additive-expression | |
4621 | shift-expression << additive-expression | |
4622 | shift-expression >> additive-expression | |
4623 | ||
4624 | Returns a representation of the expression. */ | |
4625 | ||
4626 | static tree | |
94edc4ab | 4627 | cp_parser_shift_expression (cp_parser* parser) |
a723baf1 | 4628 | { |
39b1af70 | 4629 | static const cp_parser_token_tree_map map = { |
a723baf1 MM |
4630 | { CPP_LSHIFT, LSHIFT_EXPR }, |
4631 | { CPP_RSHIFT, RSHIFT_EXPR }, | |
4632 | { CPP_EOF, ERROR_MARK } | |
4633 | }; | |
4634 | ||
4635 | return cp_parser_binary_expression (parser, | |
4636 | map, | |
4637 | cp_parser_additive_expression); | |
4638 | } | |
4639 | ||
4640 | /* Parse a relational-expression. | |
4641 | ||
4642 | relational-expression: | |
4643 | shift-expression | |
4644 | relational-expression < shift-expression | |
4645 | relational-expression > shift-expression | |
4646 | relational-expression <= shift-expression | |
4647 | relational-expression >= shift-expression | |
4648 | ||
4649 | GNU Extension: | |
4650 | ||
4651 | relational-expression: | |
4652 | relational-expression <? shift-expression | |
4653 | relational-expression >? shift-expression | |
4654 | ||
4655 | Returns a representation of the expression. */ | |
4656 | ||
4657 | static tree | |
94edc4ab | 4658 | cp_parser_relational_expression (cp_parser* parser) |
a723baf1 | 4659 | { |
39b1af70 | 4660 | static const cp_parser_token_tree_map map = { |
a723baf1 MM |
4661 | { CPP_LESS, LT_EXPR }, |
4662 | { CPP_GREATER, GT_EXPR }, | |
4663 | { CPP_LESS_EQ, LE_EXPR }, | |
4664 | { CPP_GREATER_EQ, GE_EXPR }, | |
4665 | { CPP_MIN, MIN_EXPR }, | |
4666 | { CPP_MAX, MAX_EXPR }, | |
4667 | { CPP_EOF, ERROR_MARK } | |
4668 | }; | |
4669 | ||
4670 | return cp_parser_binary_expression (parser, | |
4671 | map, | |
4672 | cp_parser_shift_expression); | |
4673 | } | |
4674 | ||
4675 | /* Parse an equality-expression. | |
4676 | ||
4677 | equality-expression: | |
4678 | relational-expression | |
4679 | equality-expression == relational-expression | |
4680 | equality-expression != relational-expression | |
4681 | ||
4682 | Returns a representation of the expression. */ | |
4683 | ||
4684 | static tree | |
94edc4ab | 4685 | cp_parser_equality_expression (cp_parser* parser) |
a723baf1 | 4686 | { |
39b1af70 | 4687 | static const cp_parser_token_tree_map map = { |
a723baf1 MM |
4688 | { CPP_EQ_EQ, EQ_EXPR }, |
4689 | { CPP_NOT_EQ, NE_EXPR }, | |
4690 | { CPP_EOF, ERROR_MARK } | |
4691 | }; | |
4692 | ||
4693 | return cp_parser_binary_expression (parser, | |
4694 | map, | |
4695 | cp_parser_relational_expression); | |
4696 | } | |
4697 | ||
4698 | /* Parse an and-expression. | |
4699 | ||
4700 | and-expression: | |
4701 | equality-expression | |
4702 | and-expression & equality-expression | |
4703 | ||
4704 | Returns a representation of the expression. */ | |
4705 | ||
4706 | static tree | |
94edc4ab | 4707 | cp_parser_and_expression (cp_parser* parser) |
a723baf1 | 4708 | { |
39b1af70 | 4709 | static const cp_parser_token_tree_map map = { |
a723baf1 MM |
4710 | { CPP_AND, BIT_AND_EXPR }, |
4711 | { CPP_EOF, ERROR_MARK } | |
4712 | }; | |
4713 | ||
4714 | return cp_parser_binary_expression (parser, | |
4715 | map, | |
4716 | cp_parser_equality_expression); | |
4717 | } | |
4718 | ||
4719 | /* Parse an exclusive-or-expression. | |
4720 | ||
4721 | exclusive-or-expression: | |
4722 | and-expression | |
4723 | exclusive-or-expression ^ and-expression | |
4724 | ||
4725 | Returns a representation of the expression. */ | |
4726 | ||
4727 | static tree | |
94edc4ab | 4728 | cp_parser_exclusive_or_expression (cp_parser* parser) |
a723baf1 | 4729 | { |
39b1af70 | 4730 | static const cp_parser_token_tree_map map = { |
a723baf1 MM |
4731 | { CPP_XOR, BIT_XOR_EXPR }, |
4732 | { CPP_EOF, ERROR_MARK } | |
4733 | }; | |
4734 | ||
4735 | return cp_parser_binary_expression (parser, | |
4736 | map, | |
4737 | cp_parser_and_expression); | |
4738 | } | |
4739 | ||
4740 | ||
4741 | /* Parse an inclusive-or-expression. | |
4742 | ||
4743 | inclusive-or-expression: | |
4744 | exclusive-or-expression | |
4745 | inclusive-or-expression | exclusive-or-expression | |
4746 | ||
4747 | Returns a representation of the expression. */ | |
4748 | ||
4749 | static tree | |
94edc4ab | 4750 | cp_parser_inclusive_or_expression (cp_parser* parser) |
a723baf1 | 4751 | { |
39b1af70 | 4752 | static const cp_parser_token_tree_map map = { |
a723baf1 MM |
4753 | { CPP_OR, BIT_IOR_EXPR }, |
4754 | { CPP_EOF, ERROR_MARK } | |
4755 | }; | |
4756 | ||
4757 | return cp_parser_binary_expression (parser, | |
4758 | map, | |
4759 | cp_parser_exclusive_or_expression); | |
4760 | } | |
4761 | ||
4762 | /* Parse a logical-and-expression. | |
4763 | ||
4764 | logical-and-expression: | |
4765 | inclusive-or-expression | |
4766 | logical-and-expression && inclusive-or-expression | |
4767 | ||
4768 | Returns a representation of the expression. */ | |
4769 | ||
4770 | static tree | |
94edc4ab | 4771 | cp_parser_logical_and_expression (cp_parser* parser) |
a723baf1 | 4772 | { |
39b1af70 | 4773 | static const cp_parser_token_tree_map map = { |
a723baf1 MM |
4774 | { CPP_AND_AND, TRUTH_ANDIF_EXPR }, |
4775 | { CPP_EOF, ERROR_MARK } | |
4776 | }; | |
4777 | ||
4778 | return cp_parser_binary_expression (parser, | |
4779 | map, | |
4780 | cp_parser_inclusive_or_expression); | |
4781 | } | |
4782 | ||
4783 | /* Parse a logical-or-expression. | |
4784 | ||
4785 | logical-or-expression: | |
34cd5ae7 | 4786 | logical-and-expression |
a723baf1 MM |
4787 | logical-or-expression || logical-and-expression |
4788 | ||
4789 | Returns a representation of the expression. */ | |
4790 | ||
4791 | static tree | |
94edc4ab | 4792 | cp_parser_logical_or_expression (cp_parser* parser) |
a723baf1 | 4793 | { |
39b1af70 | 4794 | static const cp_parser_token_tree_map map = { |
a723baf1 MM |
4795 | { CPP_OR_OR, TRUTH_ORIF_EXPR }, |
4796 | { CPP_EOF, ERROR_MARK } | |
4797 | }; | |
4798 | ||
4799 | return cp_parser_binary_expression (parser, | |
4800 | map, | |
4801 | cp_parser_logical_and_expression); | |
4802 | } | |
4803 | ||
a723baf1 MM |
4804 | /* Parse the `? expression : assignment-expression' part of a |
4805 | conditional-expression. The LOGICAL_OR_EXPR is the | |
4806 | logical-or-expression that started the conditional-expression. | |
4807 | Returns a representation of the entire conditional-expression. | |
4808 | ||
39703eb9 | 4809 | This routine is used by cp_parser_assignment_expression. |
a723baf1 MM |
4810 | |
4811 | ? expression : assignment-expression | |
4812 | ||
4813 | GNU Extensions: | |
4814 | ||
4815 | ? : assignment-expression */ | |
4816 | ||
4817 | static tree | |
94edc4ab | 4818 | cp_parser_question_colon_clause (cp_parser* parser, tree logical_or_expr) |
a723baf1 MM |
4819 | { |
4820 | tree expr; | |
4821 | tree assignment_expr; | |
4822 | ||
4823 | /* Consume the `?' token. */ | |
4824 | cp_lexer_consume_token (parser->lexer); | |
4825 | if (cp_parser_allow_gnu_extensions_p (parser) | |
4826 | && cp_lexer_next_token_is (parser->lexer, CPP_COLON)) | |
4827 | /* Implicit true clause. */ | |
4828 | expr = NULL_TREE; | |
4829 | else | |
4830 | /* Parse the expression. */ | |
4831 | expr = cp_parser_expression (parser); | |
4832 | ||
4833 | /* The next token should be a `:'. */ | |
4834 | cp_parser_require (parser, CPP_COLON, "`:'"); | |
4835 | /* Parse the assignment-expression. */ | |
4836 | assignment_expr = cp_parser_assignment_expression (parser); | |
4837 | ||
4838 | /* Build the conditional-expression. */ | |
4839 | return build_x_conditional_expr (logical_or_expr, | |
4840 | expr, | |
4841 | assignment_expr); | |
4842 | } | |
4843 | ||
4844 | /* Parse an assignment-expression. | |
4845 | ||
4846 | assignment-expression: | |
4847 | conditional-expression | |
4848 | logical-or-expression assignment-operator assignment_expression | |
4849 | throw-expression | |
4850 | ||
4851 | Returns a representation for the expression. */ | |
4852 | ||
4853 | static tree | |
94edc4ab | 4854 | cp_parser_assignment_expression (cp_parser* parser) |
a723baf1 MM |
4855 | { |
4856 | tree expr; | |
4857 | ||
4858 | /* If the next token is the `throw' keyword, then we're looking at | |
4859 | a throw-expression. */ | |
4860 | if (cp_lexer_next_token_is_keyword (parser->lexer, RID_THROW)) | |
4861 | expr = cp_parser_throw_expression (parser); | |
4862 | /* Otherwise, it must be that we are looking at a | |
4863 | logical-or-expression. */ | |
4864 | else | |
4865 | { | |
4866 | /* Parse the logical-or-expression. */ | |
4867 | expr = cp_parser_logical_or_expression (parser); | |
4868 | /* If the next token is a `?' then we're actually looking at a | |
4869 | conditional-expression. */ | |
4870 | if (cp_lexer_next_token_is (parser->lexer, CPP_QUERY)) | |
4871 | return cp_parser_question_colon_clause (parser, expr); | |
4872 | else | |
4873 | { | |
4874 | enum tree_code assignment_operator; | |
4875 | ||
4876 | /* If it's an assignment-operator, we're using the second | |
4877 | production. */ | |
4878 | assignment_operator | |
4879 | = cp_parser_assignment_operator_opt (parser); | |
4880 | if (assignment_operator != ERROR_MARK) | |
4881 | { | |
4882 | tree rhs; | |
4883 | ||
4884 | /* Parse the right-hand side of the assignment. */ | |
4885 | rhs = cp_parser_assignment_expression (parser); | |
14d22dd6 MM |
4886 | /* An assignment may not appear in a |
4887 | constant-expression. */ | |
4888 | if (parser->constant_expression_p) | |
4889 | { | |
4890 | if (!parser->allow_non_constant_expression_p) | |
4891 | return cp_parser_non_constant_expression ("an assignment"); | |
4892 | parser->non_constant_expression_p = true; | |
4893 | } | |
34cd5ae7 | 4894 | /* Build the assignment expression. */ |
a723baf1 MM |
4895 | expr = build_x_modify_expr (expr, |
4896 | assignment_operator, | |
4897 | rhs); | |
4898 | } | |
4899 | } | |
4900 | } | |
4901 | ||
4902 | return expr; | |
4903 | } | |
4904 | ||
4905 | /* Parse an (optional) assignment-operator. | |
4906 | ||
4907 | assignment-operator: one of | |
4908 | = *= /= %= += -= >>= <<= &= ^= |= | |
4909 | ||
4910 | GNU Extension: | |
4911 | ||
4912 | assignment-operator: one of | |
4913 | <?= >?= | |
4914 | ||
4915 | If the next token is an assignment operator, the corresponding tree | |
4916 | code is returned, and the token is consumed. For example, for | |
4917 | `+=', PLUS_EXPR is returned. For `=' itself, the code returned is | |
4918 | NOP_EXPR. For `/', TRUNC_DIV_EXPR is returned; for `%', | |
4919 | TRUNC_MOD_EXPR is returned. If TOKEN is not an assignment | |
4920 | operator, ERROR_MARK is returned. */ | |
4921 | ||
4922 | static enum tree_code | |
94edc4ab | 4923 | cp_parser_assignment_operator_opt (cp_parser* parser) |
a723baf1 MM |
4924 | { |
4925 | enum tree_code op; | |
4926 | cp_token *token; | |
4927 | ||
4928 | /* Peek at the next toen. */ | |
4929 | token = cp_lexer_peek_token (parser->lexer); | |
4930 | ||
4931 | switch (token->type) | |
4932 | { | |
4933 | case CPP_EQ: | |
4934 | op = NOP_EXPR; | |
4935 | break; | |
4936 | ||
4937 | case CPP_MULT_EQ: | |
4938 | op = MULT_EXPR; | |
4939 | break; | |
4940 | ||
4941 | case CPP_DIV_EQ: | |
4942 | op = TRUNC_DIV_EXPR; | |
4943 | break; | |
4944 | ||
4945 | case CPP_MOD_EQ: | |
4946 | op = TRUNC_MOD_EXPR; | |
4947 | break; | |
4948 | ||
4949 | case CPP_PLUS_EQ: | |
4950 | op = PLUS_EXPR; | |
4951 | break; | |
4952 | ||
4953 | case CPP_MINUS_EQ: | |
4954 | op = MINUS_EXPR; | |
4955 | break; | |
4956 | ||
4957 | case CPP_RSHIFT_EQ: | |
4958 | op = RSHIFT_EXPR; | |
4959 | break; | |
4960 | ||
4961 | case CPP_LSHIFT_EQ: | |
4962 | op = LSHIFT_EXPR; | |
4963 | break; | |
4964 | ||
4965 | case CPP_AND_EQ: | |
4966 | op = BIT_AND_EXPR; | |
4967 | break; | |
4968 | ||
4969 | case CPP_XOR_EQ: | |
4970 | op = BIT_XOR_EXPR; | |
4971 | break; | |
4972 | ||
4973 | case CPP_OR_EQ: | |
4974 | op = BIT_IOR_EXPR; | |
4975 | break; | |
4976 | ||
4977 | case CPP_MIN_EQ: | |
4978 | op = MIN_EXPR; | |
4979 | break; | |
4980 | ||
4981 | case CPP_MAX_EQ: | |
4982 | op = MAX_EXPR; | |
4983 | break; | |
4984 | ||
4985 | default: | |
4986 | /* Nothing else is an assignment operator. */ | |
4987 | op = ERROR_MARK; | |
4988 | } | |
4989 | ||
4990 | /* If it was an assignment operator, consume it. */ | |
4991 | if (op != ERROR_MARK) | |
4992 | cp_lexer_consume_token (parser->lexer); | |
4993 | ||
4994 | return op; | |
4995 | } | |
4996 | ||
4997 | /* Parse an expression. | |
4998 | ||
4999 | expression: | |
5000 | assignment-expression | |
5001 | expression , assignment-expression | |
5002 | ||
5003 | Returns a representation of the expression. */ | |
5004 | ||
5005 | static tree | |
94edc4ab | 5006 | cp_parser_expression (cp_parser* parser) |
a723baf1 MM |
5007 | { |
5008 | tree expression = NULL_TREE; | |
a723baf1 MM |
5009 | |
5010 | while (true) | |
5011 | { | |
5012 | tree assignment_expression; | |
5013 | ||
5014 | /* Parse the next assignment-expression. */ | |
5015 | assignment_expression | |
5016 | = cp_parser_assignment_expression (parser); | |
5017 | /* If this is the first assignment-expression, we can just | |
5018 | save it away. */ | |
5019 | if (!expression) | |
5020 | expression = assignment_expression; | |
a723baf1 | 5021 | else |
d17811fd MM |
5022 | expression = build_x_compound_expr (expression, |
5023 | assignment_expression); | |
a723baf1 MM |
5024 | /* If the next token is not a comma, then we are done with the |
5025 | expression. */ | |
5026 | if (cp_lexer_next_token_is_not (parser->lexer, CPP_COMMA)) | |
5027 | break; | |
5028 | /* Consume the `,'. */ | |
5029 | cp_lexer_consume_token (parser->lexer); | |
14d22dd6 MM |
5030 | /* A comma operator cannot appear in a constant-expression. */ |
5031 | if (parser->constant_expression_p) | |
5032 | { | |
5033 | if (!parser->allow_non_constant_expression_p) | |
d17811fd MM |
5034 | expression |
5035 | = cp_parser_non_constant_expression ("a comma operator"); | |
14d22dd6 MM |
5036 | parser->non_constant_expression_p = true; |
5037 | } | |
14d22dd6 | 5038 | } |
a723baf1 MM |
5039 | |
5040 | return expression; | |
5041 | } | |
5042 | ||
5043 | /* Parse a constant-expression. | |
5044 | ||
5045 | constant-expression: | |
14d22dd6 MM |
5046 | conditional-expression |
5047 | ||
5048 | If ALLOW_NON_CONSTANT_P a non-constant expression is silently | |
d17811fd MM |
5049 | accepted. If ALLOW_NON_CONSTANT_P is true and the expression is not |
5050 | constant, *NON_CONSTANT_P is set to TRUE. If ALLOW_NON_CONSTANT_P | |
5051 | is false, NON_CONSTANT_P should be NULL. */ | |
a723baf1 MM |
5052 | |
5053 | static tree | |
14d22dd6 MM |
5054 | cp_parser_constant_expression (cp_parser* parser, |
5055 | bool allow_non_constant_p, | |
5056 | bool *non_constant_p) | |
a723baf1 MM |
5057 | { |
5058 | bool saved_constant_expression_p; | |
14d22dd6 MM |
5059 | bool saved_allow_non_constant_expression_p; |
5060 | bool saved_non_constant_expression_p; | |
a723baf1 MM |
5061 | tree expression; |
5062 | ||
5063 | /* It might seem that we could simply parse the | |
5064 | conditional-expression, and then check to see if it were | |
5065 | TREE_CONSTANT. However, an expression that is TREE_CONSTANT is | |
5066 | one that the compiler can figure out is constant, possibly after | |
5067 | doing some simplifications or optimizations. The standard has a | |
5068 | precise definition of constant-expression, and we must honor | |
5069 | that, even though it is somewhat more restrictive. | |
5070 | ||
5071 | For example: | |
5072 | ||
5073 | int i[(2, 3)]; | |
5074 | ||
5075 | is not a legal declaration, because `(2, 3)' is not a | |
5076 | constant-expression. The `,' operator is forbidden in a | |
5077 | constant-expression. However, GCC's constant-folding machinery | |
5078 | will fold this operation to an INTEGER_CST for `3'. */ | |
5079 | ||
14d22dd6 | 5080 | /* Save the old settings. */ |
a723baf1 | 5081 | saved_constant_expression_p = parser->constant_expression_p; |
14d22dd6 MM |
5082 | saved_allow_non_constant_expression_p |
5083 | = parser->allow_non_constant_expression_p; | |
5084 | saved_non_constant_expression_p = parser->non_constant_expression_p; | |
a723baf1 MM |
5085 | /* We are now parsing a constant-expression. */ |
5086 | parser->constant_expression_p = true; | |
14d22dd6 MM |
5087 | parser->allow_non_constant_expression_p = allow_non_constant_p; |
5088 | parser->non_constant_expression_p = false; | |
39703eb9 MM |
5089 | /* Although the grammar says "conditional-expression", we parse an |
5090 | "assignment-expression", which also permits "throw-expression" | |
5091 | and the use of assignment operators. In the case that | |
5092 | ALLOW_NON_CONSTANT_P is false, we get better errors than we would | |
5093 | otherwise. In the case that ALLOW_NON_CONSTANT_P is true, it is | |
5094 | actually essential that we look for an assignment-expression. | |
5095 | For example, cp_parser_initializer_clauses uses this function to | |
5096 | determine whether a particular assignment-expression is in fact | |
5097 | constant. */ | |
5098 | expression = cp_parser_assignment_expression (parser); | |
14d22dd6 | 5099 | /* Restore the old settings. */ |
a723baf1 | 5100 | parser->constant_expression_p = saved_constant_expression_p; |
14d22dd6 MM |
5101 | parser->allow_non_constant_expression_p |
5102 | = saved_allow_non_constant_expression_p; | |
5103 | if (allow_non_constant_p) | |
5104 | *non_constant_p = parser->non_constant_expression_p; | |
5105 | parser->non_constant_expression_p = saved_non_constant_expression_p; | |
a723baf1 MM |
5106 | |
5107 | return expression; | |
5108 | } | |
5109 | ||
5110 | /* Statements [gram.stmt.stmt] */ | |
5111 | ||
5112 | /* Parse a statement. | |
5113 | ||
5114 | statement: | |
5115 | labeled-statement | |
5116 | expression-statement | |
5117 | compound-statement | |
5118 | selection-statement | |
5119 | iteration-statement | |
5120 | jump-statement | |
5121 | declaration-statement | |
5122 | try-block */ | |
5123 | ||
5124 | static void | |
a5bcc582 | 5125 | cp_parser_statement (cp_parser* parser, bool in_statement_expr_p) |
a723baf1 MM |
5126 | { |
5127 | tree statement; | |
5128 | cp_token *token; | |
5129 | int statement_line_number; | |
5130 | ||
5131 | /* There is no statement yet. */ | |
5132 | statement = NULL_TREE; | |
5133 | /* Peek at the next token. */ | |
5134 | token = cp_lexer_peek_token (parser->lexer); | |
5135 | /* Remember the line number of the first token in the statement. */ | |
82a98427 | 5136 | statement_line_number = token->location.line; |
a723baf1 MM |
5137 | /* If this is a keyword, then that will often determine what kind of |
5138 | statement we have. */ | |
5139 | if (token->type == CPP_KEYWORD) | |
5140 | { | |
5141 | enum rid keyword = token->keyword; | |
5142 | ||
5143 | switch (keyword) | |
5144 | { | |
5145 | case RID_CASE: | |
5146 | case RID_DEFAULT: | |
a5bcc582 NS |
5147 | statement = cp_parser_labeled_statement (parser, |
5148 | in_statement_expr_p); | |
a723baf1 MM |
5149 | break; |
5150 | ||
5151 | case RID_IF: | |
5152 | case RID_SWITCH: | |
5153 | statement = cp_parser_selection_statement (parser); | |
5154 | break; | |
5155 | ||
5156 | case RID_WHILE: | |
5157 | case RID_DO: | |
5158 | case RID_FOR: | |
5159 | statement = cp_parser_iteration_statement (parser); | |
5160 | break; | |
5161 | ||
5162 | case RID_BREAK: | |
5163 | case RID_CONTINUE: | |
5164 | case RID_RETURN: | |
5165 | case RID_GOTO: | |
5166 | statement = cp_parser_jump_statement (parser); | |
5167 | break; | |
5168 | ||
5169 | case RID_TRY: | |
5170 | statement = cp_parser_try_block (parser); | |
5171 | break; | |
5172 | ||
5173 | default: | |
5174 | /* It might be a keyword like `int' that can start a | |
5175 | declaration-statement. */ | |
5176 | break; | |
5177 | } | |
5178 | } | |
5179 | else if (token->type == CPP_NAME) | |
5180 | { | |
5181 | /* If the next token is a `:', then we are looking at a | |
5182 | labeled-statement. */ | |
5183 | token = cp_lexer_peek_nth_token (parser->lexer, 2); | |
5184 | if (token->type == CPP_COLON) | |
a5bcc582 | 5185 | statement = cp_parser_labeled_statement (parser, in_statement_expr_p); |
a723baf1 MM |
5186 | } |
5187 | /* Anything that starts with a `{' must be a compound-statement. */ | |
5188 | else if (token->type == CPP_OPEN_BRACE) | |
a5bcc582 | 5189 | statement = cp_parser_compound_statement (parser, false); |
a723baf1 MM |
5190 | |
5191 | /* Everything else must be a declaration-statement or an | |
5192 | expression-statement. Try for the declaration-statement | |
5193 | first, unless we are looking at a `;', in which case we know that | |
5194 | we have an expression-statement. */ | |
5195 | if (!statement) | |
5196 | { | |
5197 | if (cp_lexer_next_token_is_not (parser->lexer, CPP_SEMICOLON)) | |
5198 | { | |
5199 | cp_parser_parse_tentatively (parser); | |
5200 | /* Try to parse the declaration-statement. */ | |
5201 | cp_parser_declaration_statement (parser); | |
5202 | /* If that worked, we're done. */ | |
5203 | if (cp_parser_parse_definitely (parser)) | |
5204 | return; | |
5205 | } | |
5206 | /* Look for an expression-statement instead. */ | |
a5bcc582 | 5207 | statement = cp_parser_expression_statement (parser, in_statement_expr_p); |
a723baf1 MM |
5208 | } |
5209 | ||
5210 | /* Set the line number for the statement. */ | |
009ed910 | 5211 | if (statement && STATEMENT_CODE_P (TREE_CODE (statement))) |
a723baf1 MM |
5212 | STMT_LINENO (statement) = statement_line_number; |
5213 | } | |
5214 | ||
5215 | /* Parse a labeled-statement. | |
5216 | ||
5217 | labeled-statement: | |
5218 | identifier : statement | |
5219 | case constant-expression : statement | |
5220 | default : statement | |
5221 | ||
5222 | Returns the new CASE_LABEL, for a `case' or `default' label. For | |
5223 | an ordinary label, returns a LABEL_STMT. */ | |
5224 | ||
5225 | static tree | |
a5bcc582 | 5226 | cp_parser_labeled_statement (cp_parser* parser, bool in_statement_expr_p) |
a723baf1 MM |
5227 | { |
5228 | cp_token *token; | |
5229 | tree statement = NULL_TREE; | |
5230 | ||
5231 | /* The next token should be an identifier. */ | |
5232 | token = cp_lexer_peek_token (parser->lexer); | |
5233 | if (token->type != CPP_NAME | |
5234 | && token->type != CPP_KEYWORD) | |
5235 | { | |
5236 | cp_parser_error (parser, "expected labeled-statement"); | |
5237 | return error_mark_node; | |
5238 | } | |
5239 | ||
5240 | switch (token->keyword) | |
5241 | { | |
5242 | case RID_CASE: | |
5243 | { | |
5244 | tree expr; | |
5245 | ||
5246 | /* Consume the `case' token. */ | |
5247 | cp_lexer_consume_token (parser->lexer); | |
5248 | /* Parse the constant-expression. */ | |
14d22dd6 | 5249 | expr = cp_parser_constant_expression (parser, |
d17811fd | 5250 | /*allow_non_constant_p=*/false, |
14d22dd6 | 5251 | NULL); |
a723baf1 MM |
5252 | /* Create the label. */ |
5253 | statement = finish_case_label (expr, NULL_TREE); | |
5254 | } | |
5255 | break; | |
5256 | ||
5257 | case RID_DEFAULT: | |
5258 | /* Consume the `default' token. */ | |
5259 | cp_lexer_consume_token (parser->lexer); | |
5260 | /* Create the label. */ | |
5261 | statement = finish_case_label (NULL_TREE, NULL_TREE); | |
5262 | break; | |
5263 | ||
5264 | default: | |
5265 | /* Anything else must be an ordinary label. */ | |
5266 | statement = finish_label_stmt (cp_parser_identifier (parser)); | |
5267 | break; | |
5268 | } | |
5269 | ||
5270 | /* Require the `:' token. */ | |
5271 | cp_parser_require (parser, CPP_COLON, "`:'"); | |
5272 | /* Parse the labeled statement. */ | |
a5bcc582 | 5273 | cp_parser_statement (parser, in_statement_expr_p); |
a723baf1 MM |
5274 | |
5275 | /* Return the label, in the case of a `case' or `default' label. */ | |
5276 | return statement; | |
5277 | } | |
5278 | ||
5279 | /* Parse an expression-statement. | |
5280 | ||
5281 | expression-statement: | |
5282 | expression [opt] ; | |
5283 | ||
5284 | Returns the new EXPR_STMT -- or NULL_TREE if the expression | |
a5bcc582 NS |
5285 | statement consists of nothing more than an `;'. IN_STATEMENT_EXPR_P |
5286 | indicates whether this expression-statement is part of an | |
5287 | expression statement. */ | |
a723baf1 MM |
5288 | |
5289 | static tree | |
a5bcc582 | 5290 | cp_parser_expression_statement (cp_parser* parser, bool in_statement_expr_p) |
a723baf1 | 5291 | { |
a5bcc582 | 5292 | tree statement = NULL_TREE; |
a723baf1 | 5293 | |
a5bcc582 NS |
5294 | /* If the next token is a ';', then there is no expression |
5295 | statement. */ | |
a723baf1 | 5296 | if (cp_lexer_next_token_is_not (parser->lexer, CPP_SEMICOLON)) |
a5bcc582 NS |
5297 | statement = cp_parser_expression (parser); |
5298 | ||
a723baf1 | 5299 | /* Consume the final `;'. */ |
e0860732 | 5300 | cp_parser_consume_semicolon_at_end_of_statement (parser); |
a723baf1 | 5301 | |
a5bcc582 NS |
5302 | if (in_statement_expr_p |
5303 | && cp_lexer_next_token_is (parser->lexer, CPP_CLOSE_BRACE)) | |
5304 | { | |
5305 | /* This is the final expression statement of a statement | |
5306 | expression. */ | |
5307 | statement = finish_stmt_expr_expr (statement); | |
5308 | } | |
5309 | else if (statement) | |
5310 | statement = finish_expr_stmt (statement); | |
5311 | else | |
5312 | finish_stmt (); | |
5313 | ||
a723baf1 MM |
5314 | return statement; |
5315 | } | |
5316 | ||
5317 | /* Parse a compound-statement. | |
5318 | ||
5319 | compound-statement: | |
5320 | { statement-seq [opt] } | |
5321 | ||
5322 | Returns a COMPOUND_STMT representing the statement. */ | |
5323 | ||
5324 | static tree | |
a5bcc582 | 5325 | cp_parser_compound_statement (cp_parser *parser, bool in_statement_expr_p) |
a723baf1 MM |
5326 | { |
5327 | tree compound_stmt; | |
5328 | ||
5329 | /* Consume the `{'. */ | |
5330 | if (!cp_parser_require (parser, CPP_OPEN_BRACE, "`{'")) | |
5331 | return error_mark_node; | |
5332 | /* Begin the compound-statement. */ | |
7a3397c7 | 5333 | compound_stmt = begin_compound_stmt (/*has_no_scope=*/false); |
a723baf1 | 5334 | /* Parse an (optional) statement-seq. */ |
a5bcc582 | 5335 | cp_parser_statement_seq_opt (parser, in_statement_expr_p); |
a723baf1 | 5336 | /* Finish the compound-statement. */ |
7a3397c7 | 5337 | finish_compound_stmt (compound_stmt); |
a723baf1 MM |
5338 | /* Consume the `}'. */ |
5339 | cp_parser_require (parser, CPP_CLOSE_BRACE, "`}'"); | |
5340 | ||
5341 | return compound_stmt; | |
5342 | } | |
5343 | ||
5344 | /* Parse an (optional) statement-seq. | |
5345 | ||
5346 | statement-seq: | |
5347 | statement | |
5348 | statement-seq [opt] statement */ | |
5349 | ||
5350 | static void | |
a5bcc582 | 5351 | cp_parser_statement_seq_opt (cp_parser* parser, bool in_statement_expr_p) |
a723baf1 MM |
5352 | { |
5353 | /* Scan statements until there aren't any more. */ | |
5354 | while (true) | |
5355 | { | |
5356 | /* If we're looking at a `}', then we've run out of statements. */ | |
5357 | if (cp_lexer_next_token_is (parser->lexer, CPP_CLOSE_BRACE) | |
5358 | || cp_lexer_next_token_is (parser->lexer, CPP_EOF)) | |
5359 | break; | |
5360 | ||
5361 | /* Parse the statement. */ | |
a5bcc582 | 5362 | cp_parser_statement (parser, in_statement_expr_p); |
a723baf1 MM |
5363 | } |
5364 | } | |
5365 | ||
5366 | /* Parse a selection-statement. | |
5367 | ||
5368 | selection-statement: | |
5369 | if ( condition ) statement | |
5370 | if ( condition ) statement else statement | |
5371 | switch ( condition ) statement | |
5372 | ||
5373 | Returns the new IF_STMT or SWITCH_STMT. */ | |
5374 | ||
5375 | static tree | |
94edc4ab | 5376 | cp_parser_selection_statement (cp_parser* parser) |
a723baf1 MM |
5377 | { |
5378 | cp_token *token; | |
5379 | enum rid keyword; | |
5380 | ||
5381 | /* Peek at the next token. */ | |
5382 | token = cp_parser_require (parser, CPP_KEYWORD, "selection-statement"); | |
5383 | ||
5384 | /* See what kind of keyword it is. */ | |
5385 | keyword = token->keyword; | |
5386 | switch (keyword) | |
5387 | { | |
5388 | case RID_IF: | |
5389 | case RID_SWITCH: | |
5390 | { | |
5391 | tree statement; | |
5392 | tree condition; | |
5393 | ||
5394 | /* Look for the `('. */ | |
5395 | if (!cp_parser_require (parser, CPP_OPEN_PAREN, "`('")) | |
5396 | { | |
5397 | cp_parser_skip_to_end_of_statement (parser); | |
5398 | return error_mark_node; | |
5399 | } | |
5400 | ||
5401 | /* Begin the selection-statement. */ | |
5402 | if (keyword == RID_IF) | |
5403 | statement = begin_if_stmt (); | |
5404 | else | |
5405 | statement = begin_switch_stmt (); | |
5406 | ||
5407 | /* Parse the condition. */ | |
5408 | condition = cp_parser_condition (parser); | |
5409 | /* Look for the `)'. */ | |
5410 | if (!cp_parser_require (parser, CPP_CLOSE_PAREN, "`)'")) | |
7efa3e22 | 5411 | cp_parser_skip_to_closing_parenthesis (parser, true, false); |
a723baf1 MM |
5412 | |
5413 | if (keyword == RID_IF) | |
5414 | { | |
5415 | tree then_stmt; | |
5416 | ||
5417 | /* Add the condition. */ | |
5418 | finish_if_stmt_cond (condition, statement); | |
5419 | ||
5420 | /* Parse the then-clause. */ | |
5421 | then_stmt = cp_parser_implicitly_scoped_statement (parser); | |
5422 | finish_then_clause (statement); | |
5423 | ||
5424 | /* If the next token is `else', parse the else-clause. */ | |
5425 | if (cp_lexer_next_token_is_keyword (parser->lexer, | |
5426 | RID_ELSE)) | |
5427 | { | |
5428 | tree else_stmt; | |
5429 | ||
5430 | /* Consume the `else' keyword. */ | |
5431 | cp_lexer_consume_token (parser->lexer); | |
5432 | /* Parse the else-clause. */ | |
5433 | else_stmt | |
5434 | = cp_parser_implicitly_scoped_statement (parser); | |
5435 | finish_else_clause (statement); | |
5436 | } | |
5437 | ||
5438 | /* Now we're all done with the if-statement. */ | |
5439 | finish_if_stmt (); | |
5440 | } | |
5441 | else | |
5442 | { | |
5443 | tree body; | |
5444 | ||
5445 | /* Add the condition. */ | |
5446 | finish_switch_cond (condition, statement); | |
5447 | ||
5448 | /* Parse the body of the switch-statement. */ | |
5449 | body = cp_parser_implicitly_scoped_statement (parser); | |
5450 | ||
5451 | /* Now we're all done with the switch-statement. */ | |
5452 | finish_switch_stmt (statement); | |
5453 | } | |
5454 | ||
5455 | return statement; | |
5456 | } | |
5457 | break; | |
5458 | ||
5459 | default: | |
5460 | cp_parser_error (parser, "expected selection-statement"); | |
5461 | return error_mark_node; | |
5462 | } | |
5463 | } | |
5464 | ||
5465 | /* Parse a condition. | |
5466 | ||
5467 | condition: | |
5468 | expression | |
5469 | type-specifier-seq declarator = assignment-expression | |
5470 | ||
5471 | GNU Extension: | |
5472 | ||
5473 | condition: | |
5474 | type-specifier-seq declarator asm-specification [opt] | |
5475 | attributes [opt] = assignment-expression | |
5476 | ||
5477 | Returns the expression that should be tested. */ | |
5478 | ||
5479 | static tree | |
94edc4ab | 5480 | cp_parser_condition (cp_parser* parser) |
a723baf1 MM |
5481 | { |
5482 | tree type_specifiers; | |
5483 | const char *saved_message; | |
5484 | ||
5485 | /* Try the declaration first. */ | |
5486 | cp_parser_parse_tentatively (parser); | |
5487 | /* New types are not allowed in the type-specifier-seq for a | |
5488 | condition. */ | |
5489 | saved_message = parser->type_definition_forbidden_message; | |
5490 | parser->type_definition_forbidden_message | |
5491 | = "types may not be defined in conditions"; | |
5492 | /* Parse the type-specifier-seq. */ | |
5493 | type_specifiers = cp_parser_type_specifier_seq (parser); | |
5494 | /* Restore the saved message. */ | |
5495 | parser->type_definition_forbidden_message = saved_message; | |
5496 | /* If all is well, we might be looking at a declaration. */ | |
5497 | if (!cp_parser_error_occurred (parser)) | |
5498 | { | |
5499 | tree decl; | |
5500 | tree asm_specification; | |
5501 | tree attributes; | |
5502 | tree declarator; | |
5503 | tree initializer = NULL_TREE; | |
5504 | ||
5505 | /* Parse the declarator. */ | |
62b8a44e | 5506 | declarator = cp_parser_declarator (parser, CP_PARSER_DECLARATOR_NAMED, |
a723baf1 MM |
5507 | /*ctor_dtor_or_conv_p=*/NULL); |
5508 | /* Parse the attributes. */ | |
5509 | attributes = cp_parser_attributes_opt (parser); | |
5510 | /* Parse the asm-specification. */ | |
5511 | asm_specification = cp_parser_asm_specification_opt (parser); | |
5512 | /* If the next token is not an `=', then we might still be | |
5513 | looking at an expression. For example: | |
5514 | ||
5515 | if (A(a).x) | |
5516 | ||
5517 | looks like a decl-specifier-seq and a declarator -- but then | |
5518 | there is no `=', so this is an expression. */ | |
5519 | cp_parser_require (parser, CPP_EQ, "`='"); | |
5520 | /* If we did see an `=', then we are looking at a declaration | |
5521 | for sure. */ | |
5522 | if (cp_parser_parse_definitely (parser)) | |
5523 | { | |
5524 | /* Create the declaration. */ | |
5525 | decl = start_decl (declarator, type_specifiers, | |
5526 | /*initialized_p=*/true, | |
5527 | attributes, /*prefix_attributes=*/NULL_TREE); | |
5528 | /* Parse the assignment-expression. */ | |
5529 | initializer = cp_parser_assignment_expression (parser); | |
5530 | ||
5531 | /* Process the initializer. */ | |
5532 | cp_finish_decl (decl, | |
5533 | initializer, | |
5534 | asm_specification, | |
5535 | LOOKUP_ONLYCONVERTING); | |
5536 | ||
5537 | return convert_from_reference (decl); | |
5538 | } | |
5539 | } | |
5540 | /* If we didn't even get past the declarator successfully, we are | |
5541 | definitely not looking at a declaration. */ | |
5542 | else | |
5543 | cp_parser_abort_tentative_parse (parser); | |
5544 | ||
5545 | /* Otherwise, we are looking at an expression. */ | |
5546 | return cp_parser_expression (parser); | |
5547 | } | |
5548 | ||
5549 | /* Parse an iteration-statement. | |
5550 | ||
5551 | iteration-statement: | |
5552 | while ( condition ) statement | |
5553 | do statement while ( expression ) ; | |
5554 | for ( for-init-statement condition [opt] ; expression [opt] ) | |
5555 | statement | |
5556 | ||
5557 | Returns the new WHILE_STMT, DO_STMT, or FOR_STMT. */ | |
5558 | ||
5559 | static tree | |
94edc4ab | 5560 | cp_parser_iteration_statement (cp_parser* parser) |
a723baf1 MM |
5561 | { |
5562 | cp_token *token; | |
5563 | enum rid keyword; | |
5564 | tree statement; | |
5565 | ||
5566 | /* Peek at the next token. */ | |
5567 | token = cp_parser_require (parser, CPP_KEYWORD, "iteration-statement"); | |
5568 | if (!token) | |
5569 | return error_mark_node; | |
5570 | ||
5571 | /* See what kind of keyword it is. */ | |
5572 | keyword = token->keyword; | |
5573 | switch (keyword) | |
5574 | { | |
5575 | case RID_WHILE: | |
5576 | { | |
5577 | tree condition; | |
5578 | ||
5579 | /* Begin the while-statement. */ | |
5580 | statement = begin_while_stmt (); | |
5581 | /* Look for the `('. */ | |
5582 | cp_parser_require (parser, CPP_OPEN_PAREN, "`('"); | |
5583 | /* Parse the condition. */ | |
5584 | condition = cp_parser_condition (parser); | |
5585 | finish_while_stmt_cond (condition, statement); | |
5586 | /* Look for the `)'. */ | |
5587 | cp_parser_require (parser, CPP_CLOSE_PAREN, "`)'"); | |
5588 | /* Parse the dependent statement. */ | |
5589 | cp_parser_already_scoped_statement (parser); | |
5590 | /* We're done with the while-statement. */ | |
5591 | finish_while_stmt (statement); | |
5592 | } | |
5593 | break; | |
5594 | ||
5595 | case RID_DO: | |
5596 | { | |
5597 | tree expression; | |
5598 | ||
5599 | /* Begin the do-statement. */ | |
5600 | statement = begin_do_stmt (); | |
5601 | /* Parse the body of the do-statement. */ | |
5602 | cp_parser_implicitly_scoped_statement (parser); | |
5603 | finish_do_body (statement); | |
5604 | /* Look for the `while' keyword. */ | |
5605 | cp_parser_require_keyword (parser, RID_WHILE, "`while'"); | |
5606 | /* Look for the `('. */ | |
5607 | cp_parser_require (parser, CPP_OPEN_PAREN, "`('"); | |
5608 | /* Parse the expression. */ | |
5609 | expression = cp_parser_expression (parser); | |
5610 | /* We're done with the do-statement. */ | |
5611 | finish_do_stmt (expression, statement); | |
5612 | /* Look for the `)'. */ | |
5613 | cp_parser_require (parser, CPP_CLOSE_PAREN, "`)'"); | |
5614 | /* Look for the `;'. */ | |
5615 | cp_parser_require (parser, CPP_SEMICOLON, "`;'"); | |
5616 | } | |
5617 | break; | |
5618 | ||
5619 | case RID_FOR: | |
5620 | { | |
5621 | tree condition = NULL_TREE; | |
5622 | tree expression = NULL_TREE; | |
5623 | ||
5624 | /* Begin the for-statement. */ | |
5625 | statement = begin_for_stmt (); | |
5626 | /* Look for the `('. */ | |
5627 | cp_parser_require (parser, CPP_OPEN_PAREN, "`('"); | |
5628 | /* Parse the initialization. */ | |
5629 | cp_parser_for_init_statement (parser); | |
5630 | finish_for_init_stmt (statement); | |
5631 | ||
5632 | /* If there's a condition, process it. */ | |
5633 | if (cp_lexer_next_token_is_not (parser->lexer, CPP_SEMICOLON)) | |
5634 | condition = cp_parser_condition (parser); | |
5635 | finish_for_cond (condition, statement); | |
5636 | /* Look for the `;'. */ | |
5637 | cp_parser_require (parser, CPP_SEMICOLON, "`;'"); | |
5638 | ||
5639 | /* If there's an expression, process it. */ | |
5640 | if (cp_lexer_next_token_is_not (parser->lexer, CPP_CLOSE_PAREN)) | |
5641 | expression = cp_parser_expression (parser); | |
5642 | finish_for_expr (expression, statement); | |
5643 | /* Look for the `)'. */ | |
5644 | cp_parser_require (parser, CPP_CLOSE_PAREN, "`;'"); | |
5645 | ||
5646 | /* Parse the body of the for-statement. */ | |
5647 | cp_parser_already_scoped_statement (parser); | |
5648 | ||
5649 | /* We're done with the for-statement. */ | |
5650 | finish_for_stmt (statement); | |
5651 | } | |
5652 | break; | |
5653 | ||
5654 | default: | |
5655 | cp_parser_error (parser, "expected iteration-statement"); | |
5656 | statement = error_mark_node; | |
5657 | break; | |
5658 | } | |
5659 | ||
5660 | return statement; | |
5661 | } | |
5662 | ||
5663 | /* Parse a for-init-statement. | |
5664 | ||
5665 | for-init-statement: | |
5666 | expression-statement | |
5667 | simple-declaration */ | |
5668 | ||
5669 | static void | |
94edc4ab | 5670 | cp_parser_for_init_statement (cp_parser* parser) |
a723baf1 MM |
5671 | { |
5672 | /* If the next token is a `;', then we have an empty | |
34cd5ae7 | 5673 | expression-statement. Grammatically, this is also a |
a723baf1 MM |
5674 | simple-declaration, but an invalid one, because it does not |
5675 | declare anything. Therefore, if we did not handle this case | |
5676 | specially, we would issue an error message about an invalid | |
5677 | declaration. */ | |
5678 | if (cp_lexer_next_token_is_not (parser->lexer, CPP_SEMICOLON)) | |
5679 | { | |
5680 | /* We're going to speculatively look for a declaration, falling back | |
5681 | to an expression, if necessary. */ | |
5682 | cp_parser_parse_tentatively (parser); | |
5683 | /* Parse the declaration. */ | |
5684 | cp_parser_simple_declaration (parser, | |
5685 | /*function_definition_allowed_p=*/false); | |
5686 | /* If the tentative parse failed, then we shall need to look for an | |
5687 | expression-statement. */ | |
5688 | if (cp_parser_parse_definitely (parser)) | |
5689 | return; | |
5690 | } | |
5691 | ||
a5bcc582 | 5692 | cp_parser_expression_statement (parser, false); |
a723baf1 MM |
5693 | } |
5694 | ||
5695 | /* Parse a jump-statement. | |
5696 | ||
5697 | jump-statement: | |
5698 | break ; | |
5699 | continue ; | |
5700 | return expression [opt] ; | |
5701 | goto identifier ; | |
5702 | ||
5703 | GNU extension: | |
5704 | ||
5705 | jump-statement: | |
5706 | goto * expression ; | |
5707 | ||
5708 | Returns the new BREAK_STMT, CONTINUE_STMT, RETURN_STMT, or | |
5709 | GOTO_STMT. */ | |
5710 | ||
5711 | static tree | |
94edc4ab | 5712 | cp_parser_jump_statement (cp_parser* parser) |
a723baf1 MM |
5713 | { |
5714 | tree statement = error_mark_node; | |
5715 | cp_token *token; | |
5716 | enum rid keyword; | |
5717 | ||
5718 | /* Peek at the next token. */ | |
5719 | token = cp_parser_require (parser, CPP_KEYWORD, "jump-statement"); | |
5720 | if (!token) | |
5721 | return error_mark_node; | |
5722 | ||
5723 | /* See what kind of keyword it is. */ | |
5724 | keyword = token->keyword; | |
5725 | switch (keyword) | |
5726 | { | |
5727 | case RID_BREAK: | |
5728 | statement = finish_break_stmt (); | |
5729 | cp_parser_require (parser, CPP_SEMICOLON, "`;'"); | |
5730 | break; | |
5731 | ||
5732 | case RID_CONTINUE: | |
5733 | statement = finish_continue_stmt (); | |
5734 | cp_parser_require (parser, CPP_SEMICOLON, "`;'"); | |
5735 | break; | |
5736 | ||
5737 | case RID_RETURN: | |
5738 | { | |
5739 | tree expr; | |
5740 | ||
5741 | /* If the next token is a `;', then there is no | |
5742 | expression. */ | |
5743 | if (cp_lexer_next_token_is_not (parser->lexer, CPP_SEMICOLON)) | |
5744 | expr = cp_parser_expression (parser); | |
5745 | else | |
5746 | expr = NULL_TREE; | |
5747 | /* Build the return-statement. */ | |
5748 | statement = finish_return_stmt (expr); | |
5749 | /* Look for the final `;'. */ | |
5750 | cp_parser_require (parser, CPP_SEMICOLON, "`;'"); | |
5751 | } | |
5752 | break; | |
5753 | ||
5754 | case RID_GOTO: | |
5755 | /* Create the goto-statement. */ | |
5756 | if (cp_lexer_next_token_is (parser->lexer, CPP_MULT)) | |
5757 | { | |
5758 | /* Issue a warning about this use of a GNU extension. */ | |
5759 | if (pedantic) | |
5760 | pedwarn ("ISO C++ forbids computed gotos"); | |
5761 | /* Consume the '*' token. */ | |
5762 | cp_lexer_consume_token (parser->lexer); | |
5763 | /* Parse the dependent expression. */ | |
5764 | finish_goto_stmt (cp_parser_expression (parser)); | |
5765 | } | |
5766 | else | |
5767 | finish_goto_stmt (cp_parser_identifier (parser)); | |
5768 | /* Look for the final `;'. */ | |
5769 | cp_parser_require (parser, CPP_SEMICOLON, "`;'"); | |
5770 | break; | |
5771 | ||
5772 | default: | |
5773 | cp_parser_error (parser, "expected jump-statement"); | |
5774 | break; | |
5775 | } | |
5776 | ||
5777 | return statement; | |
5778 | } | |
5779 | ||
5780 | /* Parse a declaration-statement. | |
5781 | ||
5782 | declaration-statement: | |
5783 | block-declaration */ | |
5784 | ||
5785 | static void | |
94edc4ab | 5786 | cp_parser_declaration_statement (cp_parser* parser) |
a723baf1 MM |
5787 | { |
5788 | /* Parse the block-declaration. */ | |
5789 | cp_parser_block_declaration (parser, /*statement_p=*/true); | |
5790 | ||
5791 | /* Finish off the statement. */ | |
5792 | finish_stmt (); | |
5793 | } | |
5794 | ||
5795 | /* Some dependent statements (like `if (cond) statement'), are | |
5796 | implicitly in their own scope. In other words, if the statement is | |
5797 | a single statement (as opposed to a compound-statement), it is | |
5798 | none-the-less treated as if it were enclosed in braces. Any | |
5799 | declarations appearing in the dependent statement are out of scope | |
5800 | after control passes that point. This function parses a statement, | |
5801 | but ensures that is in its own scope, even if it is not a | |
5802 | compound-statement. | |
5803 | ||
5804 | Returns the new statement. */ | |
5805 | ||
5806 | static tree | |
94edc4ab | 5807 | cp_parser_implicitly_scoped_statement (cp_parser* parser) |
a723baf1 MM |
5808 | { |
5809 | tree statement; | |
5810 | ||
5811 | /* If the token is not a `{', then we must take special action. */ | |
5812 | if (cp_lexer_next_token_is_not (parser->lexer, CPP_OPEN_BRACE)) | |
5813 | { | |
5814 | /* Create a compound-statement. */ | |
7a3397c7 | 5815 | statement = begin_compound_stmt (/*has_no_scope=*/false); |
a723baf1 | 5816 | /* Parse the dependent-statement. */ |
a5bcc582 | 5817 | cp_parser_statement (parser, false); |
a723baf1 | 5818 | /* Finish the dummy compound-statement. */ |
7a3397c7 | 5819 | finish_compound_stmt (statement); |
a723baf1 MM |
5820 | } |
5821 | /* Otherwise, we simply parse the statement directly. */ | |
5822 | else | |
a5bcc582 | 5823 | statement = cp_parser_compound_statement (parser, false); |
a723baf1 MM |
5824 | |
5825 | /* Return the statement. */ | |
5826 | return statement; | |
5827 | } | |
5828 | ||
5829 | /* For some dependent statements (like `while (cond) statement'), we | |
5830 | have already created a scope. Therefore, even if the dependent | |
5831 | statement is a compound-statement, we do not want to create another | |
5832 | scope. */ | |
5833 | ||
5834 | static void | |
94edc4ab | 5835 | cp_parser_already_scoped_statement (cp_parser* parser) |
a723baf1 MM |
5836 | { |
5837 | /* If the token is not a `{', then we must take special action. */ | |
5838 | if (cp_lexer_next_token_is_not(parser->lexer, CPP_OPEN_BRACE)) | |
5839 | { | |
5840 | tree statement; | |
5841 | ||
5842 | /* Create a compound-statement. */ | |
7a3397c7 | 5843 | statement = begin_compound_stmt (/*has_no_scope=*/true); |
a723baf1 | 5844 | /* Parse the dependent-statement. */ |
a5bcc582 | 5845 | cp_parser_statement (parser, false); |
a723baf1 | 5846 | /* Finish the dummy compound-statement. */ |
7a3397c7 | 5847 | finish_compound_stmt (statement); |
a723baf1 MM |
5848 | } |
5849 | /* Otherwise, we simply parse the statement directly. */ | |
5850 | else | |
a5bcc582 | 5851 | cp_parser_statement (parser, false); |
a723baf1 MM |
5852 | } |
5853 | ||
5854 | /* Declarations [gram.dcl.dcl] */ | |
5855 | ||
5856 | /* Parse an optional declaration-sequence. | |
5857 | ||
5858 | declaration-seq: | |
5859 | declaration | |
5860 | declaration-seq declaration */ | |
5861 | ||
5862 | static void | |
94edc4ab | 5863 | cp_parser_declaration_seq_opt (cp_parser* parser) |
a723baf1 MM |
5864 | { |
5865 | while (true) | |
5866 | { | |
5867 | cp_token *token; | |
5868 | ||
5869 | token = cp_lexer_peek_token (parser->lexer); | |
5870 | ||
5871 | if (token->type == CPP_CLOSE_BRACE | |
5872 | || token->type == CPP_EOF) | |
5873 | break; | |
5874 | ||
5875 | if (token->type == CPP_SEMICOLON) | |
5876 | { | |
5877 | /* A declaration consisting of a single semicolon is | |
5878 | invalid. Allow it unless we're being pedantic. */ | |
5879 | if (pedantic) | |
5880 | pedwarn ("extra `;'"); | |
5881 | cp_lexer_consume_token (parser->lexer); | |
5882 | continue; | |
5883 | } | |
5884 | ||
c838d82f | 5885 | /* The C lexer modifies PENDING_LANG_CHANGE when it wants the |
34cd5ae7 | 5886 | parser to enter or exit implicit `extern "C"' blocks. */ |
c838d82f MM |
5887 | while (pending_lang_change > 0) |
5888 | { | |
5889 | push_lang_context (lang_name_c); | |
5890 | --pending_lang_change; | |
5891 | } | |
5892 | while (pending_lang_change < 0) | |
5893 | { | |
5894 | pop_lang_context (); | |
5895 | ++pending_lang_change; | |
5896 | } | |
5897 | ||
5898 | /* Parse the declaration itself. */ | |
a723baf1 MM |
5899 | cp_parser_declaration (parser); |
5900 | } | |
5901 | } | |
5902 | ||
5903 | /* Parse a declaration. | |
5904 | ||
5905 | declaration: | |
5906 | block-declaration | |
5907 | function-definition | |
5908 | template-declaration | |
5909 | explicit-instantiation | |
5910 | explicit-specialization | |
5911 | linkage-specification | |
1092805d MM |
5912 | namespace-definition |
5913 | ||
5914 | GNU extension: | |
5915 | ||
5916 | declaration: | |
5917 | __extension__ declaration */ | |
a723baf1 MM |
5918 | |
5919 | static void | |
94edc4ab | 5920 | cp_parser_declaration (cp_parser* parser) |
a723baf1 MM |
5921 | { |
5922 | cp_token token1; | |
5923 | cp_token token2; | |
1092805d MM |
5924 | int saved_pedantic; |
5925 | ||
5926 | /* Check for the `__extension__' keyword. */ | |
5927 | if (cp_parser_extension_opt (parser, &saved_pedantic)) | |
5928 | { | |
5929 | /* Parse the qualified declaration. */ | |
5930 | cp_parser_declaration (parser); | |
5931 | /* Restore the PEDANTIC flag. */ | |
5932 | pedantic = saved_pedantic; | |
5933 | ||
5934 | return; | |
5935 | } | |
a723baf1 MM |
5936 | |
5937 | /* Try to figure out what kind of declaration is present. */ | |
5938 | token1 = *cp_lexer_peek_token (parser->lexer); | |
5939 | if (token1.type != CPP_EOF) | |
5940 | token2 = *cp_lexer_peek_nth_token (parser->lexer, 2); | |
5941 | ||
5942 | /* If the next token is `extern' and the following token is a string | |
5943 | literal, then we have a linkage specification. */ | |
5944 | if (token1.keyword == RID_EXTERN | |
5945 | && cp_parser_is_string_literal (&token2)) | |
5946 | cp_parser_linkage_specification (parser); | |
5947 | /* If the next token is `template', then we have either a template | |
5948 | declaration, an explicit instantiation, or an explicit | |
5949 | specialization. */ | |
5950 | else if (token1.keyword == RID_TEMPLATE) | |
5951 | { | |
5952 | /* `template <>' indicates a template specialization. */ | |
5953 | if (token2.type == CPP_LESS | |
5954 | && cp_lexer_peek_nth_token (parser->lexer, 3)->type == CPP_GREATER) | |
5955 | cp_parser_explicit_specialization (parser); | |
5956 | /* `template <' indicates a template declaration. */ | |
5957 | else if (token2.type == CPP_LESS) | |
5958 | cp_parser_template_declaration (parser, /*member_p=*/false); | |
5959 | /* Anything else must be an explicit instantiation. */ | |
5960 | else | |
5961 | cp_parser_explicit_instantiation (parser); | |
5962 | } | |
5963 | /* If the next token is `export', then we have a template | |
5964 | declaration. */ | |
5965 | else if (token1.keyword == RID_EXPORT) | |
5966 | cp_parser_template_declaration (parser, /*member_p=*/false); | |
5967 | /* If the next token is `extern', 'static' or 'inline' and the one | |
5968 | after that is `template', we have a GNU extended explicit | |
5969 | instantiation directive. */ | |
5970 | else if (cp_parser_allow_gnu_extensions_p (parser) | |
5971 | && (token1.keyword == RID_EXTERN | |
5972 | || token1.keyword == RID_STATIC | |
5973 | || token1.keyword == RID_INLINE) | |
5974 | && token2.keyword == RID_TEMPLATE) | |
5975 | cp_parser_explicit_instantiation (parser); | |
5976 | /* If the next token is `namespace', check for a named or unnamed | |
5977 | namespace definition. */ | |
5978 | else if (token1.keyword == RID_NAMESPACE | |
5979 | && (/* A named namespace definition. */ | |
5980 | (token2.type == CPP_NAME | |
5981 | && (cp_lexer_peek_nth_token (parser->lexer, 3)->type | |
5982 | == CPP_OPEN_BRACE)) | |
5983 | /* An unnamed namespace definition. */ | |
5984 | || token2.type == CPP_OPEN_BRACE)) | |
5985 | cp_parser_namespace_definition (parser); | |
5986 | /* We must have either a block declaration or a function | |
5987 | definition. */ | |
5988 | else | |
5989 | /* Try to parse a block-declaration, or a function-definition. */ | |
5990 | cp_parser_block_declaration (parser, /*statement_p=*/false); | |
5991 | } | |
5992 | ||
5993 | /* Parse a block-declaration. | |
5994 | ||
5995 | block-declaration: | |
5996 | simple-declaration | |
5997 | asm-definition | |
5998 | namespace-alias-definition | |
5999 | using-declaration | |
6000 | using-directive | |
6001 | ||
6002 | GNU Extension: | |
6003 | ||
6004 | block-declaration: | |
6005 | __extension__ block-declaration | |
6006 | label-declaration | |
6007 | ||
34cd5ae7 | 6008 | If STATEMENT_P is TRUE, then this block-declaration is occurring as |
a723baf1 MM |
6009 | part of a declaration-statement. */ |
6010 | ||
6011 | static void | |
6012 | cp_parser_block_declaration (cp_parser *parser, | |
6013 | bool statement_p) | |
6014 | { | |
6015 | cp_token *token1; | |
6016 | int saved_pedantic; | |
6017 | ||
6018 | /* Check for the `__extension__' keyword. */ | |
6019 | if (cp_parser_extension_opt (parser, &saved_pedantic)) | |
6020 | { | |
6021 | /* Parse the qualified declaration. */ | |
6022 | cp_parser_block_declaration (parser, statement_p); | |
6023 | /* Restore the PEDANTIC flag. */ | |
6024 | pedantic = saved_pedantic; | |
6025 | ||
6026 | return; | |
6027 | } | |
6028 | ||
6029 | /* Peek at the next token to figure out which kind of declaration is | |
6030 | present. */ | |
6031 | token1 = cp_lexer_peek_token (parser->lexer); | |
6032 | ||
6033 | /* If the next keyword is `asm', we have an asm-definition. */ | |
6034 | if (token1->keyword == RID_ASM) | |
6035 | { | |
6036 | if (statement_p) | |
6037 | cp_parser_commit_to_tentative_parse (parser); | |
6038 | cp_parser_asm_definition (parser); | |
6039 | } | |
6040 | /* If the next keyword is `namespace', we have a | |
6041 | namespace-alias-definition. */ | |
6042 | else if (token1->keyword == RID_NAMESPACE) | |
6043 | cp_parser_namespace_alias_definition (parser); | |
6044 | /* If the next keyword is `using', we have either a | |
6045 | using-declaration or a using-directive. */ | |
6046 | else if (token1->keyword == RID_USING) | |
6047 | { | |
6048 | cp_token *token2; | |
6049 | ||
6050 | if (statement_p) | |
6051 | cp_parser_commit_to_tentative_parse (parser); | |
6052 | /* If the token after `using' is `namespace', then we have a | |
6053 | using-directive. */ | |
6054 | token2 = cp_lexer_peek_nth_token (parser->lexer, 2); | |
6055 | if (token2->keyword == RID_NAMESPACE) | |
6056 | cp_parser_using_directive (parser); | |
6057 | /* Otherwise, it's a using-declaration. */ | |
6058 | else | |
6059 | cp_parser_using_declaration (parser); | |
6060 | } | |
6061 | /* If the next keyword is `__label__' we have a label declaration. */ | |
6062 | else if (token1->keyword == RID_LABEL) | |
6063 | { | |
6064 | if (statement_p) | |
6065 | cp_parser_commit_to_tentative_parse (parser); | |
6066 | cp_parser_label_declaration (parser); | |
6067 | } | |
6068 | /* Anything else must be a simple-declaration. */ | |
6069 | else | |
6070 | cp_parser_simple_declaration (parser, !statement_p); | |
6071 | } | |
6072 | ||
6073 | /* Parse a simple-declaration. | |
6074 | ||
6075 | simple-declaration: | |
6076 | decl-specifier-seq [opt] init-declarator-list [opt] ; | |
6077 | ||
6078 | init-declarator-list: | |
6079 | init-declarator | |
6080 | init-declarator-list , init-declarator | |
6081 | ||
34cd5ae7 | 6082 | If FUNCTION_DEFINITION_ALLOWED_P is TRUE, then we also recognize a |
9bcb9aae | 6083 | function-definition as a simple-declaration. */ |
a723baf1 MM |
6084 | |
6085 | static void | |
94edc4ab NN |
6086 | cp_parser_simple_declaration (cp_parser* parser, |
6087 | bool function_definition_allowed_p) | |
a723baf1 MM |
6088 | { |
6089 | tree decl_specifiers; | |
6090 | tree attributes; | |
560ad596 | 6091 | int declares_class_or_enum; |
a723baf1 MM |
6092 | bool saw_declarator; |
6093 | ||
6094 | /* Defer access checks until we know what is being declared; the | |
6095 | checks for names appearing in the decl-specifier-seq should be | |
6096 | done as if we were in the scope of the thing being declared. */ | |
8d241e0b | 6097 | push_deferring_access_checks (dk_deferred); |
cf22909c | 6098 | |
a723baf1 MM |
6099 | /* Parse the decl-specifier-seq. We have to keep track of whether |
6100 | or not the decl-specifier-seq declares a named class or | |
6101 | enumeration type, since that is the only case in which the | |
6102 | init-declarator-list is allowed to be empty. | |
6103 | ||
6104 | [dcl.dcl] | |
6105 | ||
6106 | In a simple-declaration, the optional init-declarator-list can be | |
6107 | omitted only when declaring a class or enumeration, that is when | |
6108 | the decl-specifier-seq contains either a class-specifier, an | |
6109 | elaborated-type-specifier, or an enum-specifier. */ | |
6110 | decl_specifiers | |
6111 | = cp_parser_decl_specifier_seq (parser, | |
6112 | CP_PARSER_FLAGS_OPTIONAL, | |
6113 | &attributes, | |
6114 | &declares_class_or_enum); | |
6115 | /* We no longer need to defer access checks. */ | |
cf22909c | 6116 | stop_deferring_access_checks (); |
24c0ef37 | 6117 | |
39703eb9 MM |
6118 | /* In a block scope, a valid declaration must always have a |
6119 | decl-specifier-seq. By not trying to parse declarators, we can | |
6120 | resolve the declaration/expression ambiguity more quickly. */ | |
6121 | if (!function_definition_allowed_p && !decl_specifiers) | |
6122 | { | |
6123 | cp_parser_error (parser, "expected declaration"); | |
6124 | goto done; | |
6125 | } | |
6126 | ||
8fbc5ae7 MM |
6127 | /* If the next two tokens are both identifiers, the code is |
6128 | erroneous. The usual cause of this situation is code like: | |
6129 | ||
6130 | T t; | |
6131 | ||
6132 | where "T" should name a type -- but does not. */ | |
6133 | if (cp_parser_diagnose_invalid_type_name (parser)) | |
6134 | { | |
8d241e0b | 6135 | /* If parsing tentatively, we should commit; we really are |
8fbc5ae7 MM |
6136 | looking at a declaration. */ |
6137 | cp_parser_commit_to_tentative_parse (parser); | |
6138 | /* Give up. */ | |
39703eb9 | 6139 | goto done; |
8fbc5ae7 MM |
6140 | } |
6141 | ||
a723baf1 MM |
6142 | /* Keep going until we hit the `;' at the end of the simple |
6143 | declaration. */ | |
6144 | saw_declarator = false; | |
6145 | while (cp_lexer_next_token_is_not (parser->lexer, | |
6146 | CPP_SEMICOLON)) | |
6147 | { | |
6148 | cp_token *token; | |
6149 | bool function_definition_p; | |
560ad596 | 6150 | tree decl; |
a723baf1 MM |
6151 | |
6152 | saw_declarator = true; | |
6153 | /* Parse the init-declarator. */ | |
560ad596 MM |
6154 | decl = cp_parser_init_declarator (parser, decl_specifiers, attributes, |
6155 | function_definition_allowed_p, | |
6156 | /*member_p=*/false, | |
6157 | declares_class_or_enum, | |
6158 | &function_definition_p); | |
1fb3244a MM |
6159 | /* If an error occurred while parsing tentatively, exit quickly. |
6160 | (That usually happens when in the body of a function; each | |
6161 | statement is treated as a declaration-statement until proven | |
6162 | otherwise.) */ | |
6163 | if (cp_parser_error_occurred (parser)) | |
39703eb9 | 6164 | goto done; |
a723baf1 MM |
6165 | /* Handle function definitions specially. */ |
6166 | if (function_definition_p) | |
6167 | { | |
6168 | /* If the next token is a `,', then we are probably | |
6169 | processing something like: | |
6170 | ||
6171 | void f() {}, *p; | |
6172 | ||
6173 | which is erroneous. */ | |
6174 | if (cp_lexer_next_token_is (parser->lexer, CPP_COMMA)) | |
6175 | error ("mixing declarations and function-definitions is forbidden"); | |
6176 | /* Otherwise, we're done with the list of declarators. */ | |
6177 | else | |
24c0ef37 | 6178 | { |
cf22909c | 6179 | pop_deferring_access_checks (); |
24c0ef37 GS |
6180 | return; |
6181 | } | |
a723baf1 MM |
6182 | } |
6183 | /* The next token should be either a `,' or a `;'. */ | |
6184 | token = cp_lexer_peek_token (parser->lexer); | |
6185 | /* If it's a `,', there are more declarators to come. */ | |
6186 | if (token->type == CPP_COMMA) | |
6187 | cp_lexer_consume_token (parser->lexer); | |
6188 | /* If it's a `;', we are done. */ | |
6189 | else if (token->type == CPP_SEMICOLON) | |
6190 | break; | |
6191 | /* Anything else is an error. */ | |
6192 | else | |
6193 | { | |
6194 | cp_parser_error (parser, "expected `,' or `;'"); | |
6195 | /* Skip tokens until we reach the end of the statement. */ | |
6196 | cp_parser_skip_to_end_of_statement (parser); | |
39703eb9 | 6197 | goto done; |
a723baf1 MM |
6198 | } |
6199 | /* After the first time around, a function-definition is not | |
6200 | allowed -- even if it was OK at first. For example: | |
6201 | ||
6202 | int i, f() {} | |
6203 | ||
6204 | is not valid. */ | |
6205 | function_definition_allowed_p = false; | |
6206 | } | |
6207 | ||
6208 | /* Issue an error message if no declarators are present, and the | |
6209 | decl-specifier-seq does not itself declare a class or | |
6210 | enumeration. */ | |
6211 | if (!saw_declarator) | |
6212 | { | |
6213 | if (cp_parser_declares_only_class_p (parser)) | |
6214 | shadow_tag (decl_specifiers); | |
6215 | /* Perform any deferred access checks. */ | |
cf22909c | 6216 | perform_deferred_access_checks (); |
a723baf1 MM |
6217 | } |
6218 | ||
6219 | /* Consume the `;'. */ | |
6220 | cp_parser_require (parser, CPP_SEMICOLON, "`;'"); | |
6221 | ||
39703eb9 MM |
6222 | done: |
6223 | pop_deferring_access_checks (); | |
a723baf1 MM |
6224 | } |
6225 | ||
6226 | /* Parse a decl-specifier-seq. | |
6227 | ||
6228 | decl-specifier-seq: | |
6229 | decl-specifier-seq [opt] decl-specifier | |
6230 | ||
6231 | decl-specifier: | |
6232 | storage-class-specifier | |
6233 | type-specifier | |
6234 | function-specifier | |
6235 | friend | |
6236 | typedef | |
6237 | ||
6238 | GNU Extension: | |
6239 | ||
6240 | decl-specifier-seq: | |
6241 | decl-specifier-seq [opt] attributes | |
6242 | ||
6243 | Returns a TREE_LIST, giving the decl-specifiers in the order they | |
6244 | appear in the source code. The TREE_VALUE of each node is the | |
6245 | decl-specifier. For a keyword (such as `auto' or `friend'), the | |
34cd5ae7 | 6246 | TREE_VALUE is simply the corresponding TREE_IDENTIFIER. For the |
a723baf1 MM |
6247 | representation of a type-specifier, see cp_parser_type_specifier. |
6248 | ||
6249 | If there are attributes, they will be stored in *ATTRIBUTES, | |
6250 | represented as described above cp_parser_attributes. | |
6251 | ||
6252 | If FRIEND_IS_NOT_CLASS_P is non-NULL, and the `friend' specifier | |
6253 | appears, and the entity that will be a friend is not going to be a | |
6254 | class, then *FRIEND_IS_NOT_CLASS_P will be set to TRUE. Note that | |
6255 | even if *FRIEND_IS_NOT_CLASS_P is FALSE, the entity to which | |
560ad596 MM |
6256 | friendship is granted might not be a class. |
6257 | ||
6258 | *DECLARES_CLASS_OR_ENUM is set to the bitwise or of the following | |
6259 | *flags: | |
6260 | ||
6261 | 1: one of the decl-specifiers is an elaborated-type-specifier | |
6262 | 2: one of the decl-specifiers is an enum-specifier or a | |
6263 | class-specifier | |
6264 | ||
6265 | */ | |
a723baf1 MM |
6266 | |
6267 | static tree | |
94edc4ab NN |
6268 | cp_parser_decl_specifier_seq (cp_parser* parser, |
6269 | cp_parser_flags flags, | |
6270 | tree* attributes, | |
560ad596 | 6271 | int* declares_class_or_enum) |
a723baf1 MM |
6272 | { |
6273 | tree decl_specs = NULL_TREE; | |
6274 | bool friend_p = false; | |
f2ce60b8 NS |
6275 | bool constructor_possible_p = !parser->in_declarator_p; |
6276 | ||
a723baf1 | 6277 | /* Assume no class or enumeration type is declared. */ |
560ad596 | 6278 | *declares_class_or_enum = 0; |
a723baf1 MM |
6279 | |
6280 | /* Assume there are no attributes. */ | |
6281 | *attributes = NULL_TREE; | |
6282 | ||
6283 | /* Keep reading specifiers until there are no more to read. */ | |
6284 | while (true) | |
6285 | { | |
6286 | tree decl_spec = NULL_TREE; | |
6287 | bool constructor_p; | |
6288 | cp_token *token; | |
6289 | ||
6290 | /* Peek at the next token. */ | |
6291 | token = cp_lexer_peek_token (parser->lexer); | |
6292 | /* Handle attributes. */ | |
6293 | if (token->keyword == RID_ATTRIBUTE) | |
6294 | { | |
6295 | /* Parse the attributes. */ | |
6296 | decl_spec = cp_parser_attributes_opt (parser); | |
6297 | /* Add them to the list. */ | |
6298 | *attributes = chainon (*attributes, decl_spec); | |
6299 | continue; | |
6300 | } | |
6301 | /* If the next token is an appropriate keyword, we can simply | |
6302 | add it to the list. */ | |
6303 | switch (token->keyword) | |
6304 | { | |
6305 | case RID_FRIEND: | |
6306 | /* decl-specifier: | |
6307 | friend */ | |
6308 | friend_p = true; | |
6309 | /* The representation of the specifier is simply the | |
6310 | appropriate TREE_IDENTIFIER node. */ | |
6311 | decl_spec = token->value; | |
6312 | /* Consume the token. */ | |
6313 | cp_lexer_consume_token (parser->lexer); | |
6314 | break; | |
6315 | ||
6316 | /* function-specifier: | |
6317 | inline | |
6318 | virtual | |
6319 | explicit */ | |
6320 | case RID_INLINE: | |
6321 | case RID_VIRTUAL: | |
6322 | case RID_EXPLICIT: | |
6323 | decl_spec = cp_parser_function_specifier_opt (parser); | |
6324 | break; | |
6325 | ||
6326 | /* decl-specifier: | |
6327 | typedef */ | |
6328 | case RID_TYPEDEF: | |
6329 | /* The representation of the specifier is simply the | |
6330 | appropriate TREE_IDENTIFIER node. */ | |
6331 | decl_spec = token->value; | |
6332 | /* Consume the token. */ | |
6333 | cp_lexer_consume_token (parser->lexer); | |
2050a1bb MM |
6334 | /* A constructor declarator cannot appear in a typedef. */ |
6335 | constructor_possible_p = false; | |
c006d942 MM |
6336 | /* The "typedef" keyword can only occur in a declaration; we |
6337 | may as well commit at this point. */ | |
6338 | cp_parser_commit_to_tentative_parse (parser); | |
a723baf1 MM |
6339 | break; |
6340 | ||
6341 | /* storage-class-specifier: | |
6342 | auto | |
6343 | register | |
6344 | static | |
6345 | extern | |
6346 | mutable | |
6347 | ||
6348 | GNU Extension: | |
6349 | thread */ | |
6350 | case RID_AUTO: | |
6351 | case RID_REGISTER: | |
6352 | case RID_STATIC: | |
6353 | case RID_EXTERN: | |
6354 | case RID_MUTABLE: | |
6355 | case RID_THREAD: | |
6356 | decl_spec = cp_parser_storage_class_specifier_opt (parser); | |
6357 | break; | |
6358 | ||
6359 | default: | |
6360 | break; | |
6361 | } | |
6362 | ||
6363 | /* Constructors are a special case. The `S' in `S()' is not a | |
6364 | decl-specifier; it is the beginning of the declarator. */ | |
6365 | constructor_p = (!decl_spec | |
2050a1bb | 6366 | && constructor_possible_p |
a723baf1 MM |
6367 | && cp_parser_constructor_declarator_p (parser, |
6368 | friend_p)); | |
6369 | ||
6370 | /* If we don't have a DECL_SPEC yet, then we must be looking at | |
6371 | a type-specifier. */ | |
6372 | if (!decl_spec && !constructor_p) | |
6373 | { | |
560ad596 | 6374 | int decl_spec_declares_class_or_enum; |
a723baf1 MM |
6375 | bool is_cv_qualifier; |
6376 | ||
6377 | decl_spec | |
6378 | = cp_parser_type_specifier (parser, flags, | |
6379 | friend_p, | |
6380 | /*is_declaration=*/true, | |
6381 | &decl_spec_declares_class_or_enum, | |
6382 | &is_cv_qualifier); | |
6383 | ||
6384 | *declares_class_or_enum |= decl_spec_declares_class_or_enum; | |
6385 | ||
6386 | /* If this type-specifier referenced a user-defined type | |
6387 | (a typedef, class-name, etc.), then we can't allow any | |
6388 | more such type-specifiers henceforth. | |
6389 | ||
6390 | [dcl.spec] | |
6391 | ||
6392 | The longest sequence of decl-specifiers that could | |
6393 | possibly be a type name is taken as the | |
6394 | decl-specifier-seq of a declaration. The sequence shall | |
6395 | be self-consistent as described below. | |
6396 | ||
6397 | [dcl.type] | |
6398 | ||
6399 | As a general rule, at most one type-specifier is allowed | |
6400 | in the complete decl-specifier-seq of a declaration. The | |
6401 | only exceptions are the following: | |
6402 | ||
6403 | -- const or volatile can be combined with any other | |
6404 | type-specifier. | |
6405 | ||
6406 | -- signed or unsigned can be combined with char, long, | |
6407 | short, or int. | |
6408 | ||
6409 | -- .. | |
6410 | ||
6411 | Example: | |
6412 | ||
6413 | typedef char* Pc; | |
6414 | void g (const int Pc); | |
6415 | ||
6416 | Here, Pc is *not* part of the decl-specifier seq; it's | |
6417 | the declarator. Therefore, once we see a type-specifier | |
6418 | (other than a cv-qualifier), we forbid any additional | |
6419 | user-defined types. We *do* still allow things like `int | |
6420 | int' to be considered a decl-specifier-seq, and issue the | |
6421 | error message later. */ | |
6422 | if (decl_spec && !is_cv_qualifier) | |
6423 | flags |= CP_PARSER_FLAGS_NO_USER_DEFINED_TYPES; | |
2050a1bb MM |
6424 | /* A constructor declarator cannot follow a type-specifier. */ |
6425 | if (decl_spec) | |
6426 | constructor_possible_p = false; | |
a723baf1 MM |
6427 | } |
6428 | ||
6429 | /* If we still do not have a DECL_SPEC, then there are no more | |
6430 | decl-specifiers. */ | |
6431 | if (!decl_spec) | |
6432 | { | |
6433 | /* Issue an error message, unless the entire construct was | |
6434 | optional. */ | |
6435 | if (!(flags & CP_PARSER_FLAGS_OPTIONAL)) | |
6436 | { | |
6437 | cp_parser_error (parser, "expected decl specifier"); | |
6438 | return error_mark_node; | |
6439 | } | |
6440 | ||
6441 | break; | |
6442 | } | |
6443 | ||
6444 | /* Add the DECL_SPEC to the list of specifiers. */ | |
6445 | decl_specs = tree_cons (NULL_TREE, decl_spec, decl_specs); | |
6446 | ||
6447 | /* After we see one decl-specifier, further decl-specifiers are | |
6448 | always optional. */ | |
6449 | flags |= CP_PARSER_FLAGS_OPTIONAL; | |
6450 | } | |
6451 | ||
6452 | /* We have built up the DECL_SPECS in reverse order. Return them in | |
6453 | the correct order. */ | |
6454 | return nreverse (decl_specs); | |
6455 | } | |
6456 | ||
6457 | /* Parse an (optional) storage-class-specifier. | |
6458 | ||
6459 | storage-class-specifier: | |
6460 | auto | |
6461 | register | |
6462 | static | |
6463 | extern | |
6464 | mutable | |
6465 | ||
6466 | GNU Extension: | |
6467 | ||
6468 | storage-class-specifier: | |
6469 | thread | |
6470 | ||
6471 | Returns an IDENTIFIER_NODE corresponding to the keyword used. */ | |
6472 | ||
6473 | static tree | |
94edc4ab | 6474 | cp_parser_storage_class_specifier_opt (cp_parser* parser) |
a723baf1 MM |
6475 | { |
6476 | switch (cp_lexer_peek_token (parser->lexer)->keyword) | |
6477 | { | |
6478 | case RID_AUTO: | |
6479 | case RID_REGISTER: | |
6480 | case RID_STATIC: | |
6481 | case RID_EXTERN: | |
6482 | case RID_MUTABLE: | |
6483 | case RID_THREAD: | |
6484 | /* Consume the token. */ | |
6485 | return cp_lexer_consume_token (parser->lexer)->value; | |
6486 | ||
6487 | default: | |
6488 | return NULL_TREE; | |
6489 | } | |
6490 | } | |
6491 | ||
6492 | /* Parse an (optional) function-specifier. | |
6493 | ||
6494 | function-specifier: | |
6495 | inline | |
6496 | virtual | |
6497 | explicit | |
6498 | ||
6499 | Returns an IDENTIFIER_NODE corresponding to the keyword used. */ | |
6500 | ||
6501 | static tree | |
94edc4ab | 6502 | cp_parser_function_specifier_opt (cp_parser* parser) |
a723baf1 MM |
6503 | { |
6504 | switch (cp_lexer_peek_token (parser->lexer)->keyword) | |
6505 | { | |
6506 | case RID_INLINE: | |
6507 | case RID_VIRTUAL: | |
6508 | case RID_EXPLICIT: | |
6509 | /* Consume the token. */ | |
6510 | return cp_lexer_consume_token (parser->lexer)->value; | |
6511 | ||
6512 | default: | |
6513 | return NULL_TREE; | |
6514 | } | |
6515 | } | |
6516 | ||
6517 | /* Parse a linkage-specification. | |
6518 | ||
6519 | linkage-specification: | |
6520 | extern string-literal { declaration-seq [opt] } | |
6521 | extern string-literal declaration */ | |
6522 | ||
6523 | static void | |
94edc4ab | 6524 | cp_parser_linkage_specification (cp_parser* parser) |
a723baf1 MM |
6525 | { |
6526 | cp_token *token; | |
6527 | tree linkage; | |
6528 | ||
6529 | /* Look for the `extern' keyword. */ | |
6530 | cp_parser_require_keyword (parser, RID_EXTERN, "`extern'"); | |
6531 | ||
6532 | /* Peek at the next token. */ | |
6533 | token = cp_lexer_peek_token (parser->lexer); | |
6534 | /* If it's not a string-literal, then there's a problem. */ | |
6535 | if (!cp_parser_is_string_literal (token)) | |
6536 | { | |
6537 | cp_parser_error (parser, "expected language-name"); | |
6538 | return; | |
6539 | } | |
6540 | /* Consume the token. */ | |
6541 | cp_lexer_consume_token (parser->lexer); | |
6542 | ||
6543 | /* Transform the literal into an identifier. If the literal is a | |
6544 | wide-character string, or contains embedded NULs, then we can't | |
6545 | handle it as the user wants. */ | |
6546 | if (token->type == CPP_WSTRING | |
6547 | || (strlen (TREE_STRING_POINTER (token->value)) | |
6548 | != (size_t) (TREE_STRING_LENGTH (token->value) - 1))) | |
6549 | { | |
6550 | cp_parser_error (parser, "invalid linkage-specification"); | |
6551 | /* Assume C++ linkage. */ | |
6552 | linkage = get_identifier ("c++"); | |
6553 | } | |
6554 | /* If it's a simple string constant, things are easier. */ | |
6555 | else | |
6556 | linkage = get_identifier (TREE_STRING_POINTER (token->value)); | |
6557 | ||
6558 | /* We're now using the new linkage. */ | |
6559 | push_lang_context (linkage); | |
6560 | ||
6561 | /* If the next token is a `{', then we're using the first | |
6562 | production. */ | |
6563 | if (cp_lexer_next_token_is (parser->lexer, CPP_OPEN_BRACE)) | |
6564 | { | |
6565 | /* Consume the `{' token. */ | |
6566 | cp_lexer_consume_token (parser->lexer); | |
6567 | /* Parse the declarations. */ | |
6568 | cp_parser_declaration_seq_opt (parser); | |
6569 | /* Look for the closing `}'. */ | |
6570 | cp_parser_require (parser, CPP_CLOSE_BRACE, "`}'"); | |
6571 | } | |
6572 | /* Otherwise, there's just one declaration. */ | |
6573 | else | |
6574 | { | |
6575 | bool saved_in_unbraced_linkage_specification_p; | |
6576 | ||
6577 | saved_in_unbraced_linkage_specification_p | |
6578 | = parser->in_unbraced_linkage_specification_p; | |
6579 | parser->in_unbraced_linkage_specification_p = true; | |
6580 | have_extern_spec = true; | |
6581 | cp_parser_declaration (parser); | |
6582 | have_extern_spec = false; | |
6583 | parser->in_unbraced_linkage_specification_p | |
6584 | = saved_in_unbraced_linkage_specification_p; | |
6585 | } | |
6586 | ||
6587 | /* We're done with the linkage-specification. */ | |
6588 | pop_lang_context (); | |
6589 | } | |
6590 | ||
6591 | /* Special member functions [gram.special] */ | |
6592 | ||
6593 | /* Parse a conversion-function-id. | |
6594 | ||
6595 | conversion-function-id: | |
6596 | operator conversion-type-id | |
6597 | ||
6598 | Returns an IDENTIFIER_NODE representing the operator. */ | |
6599 | ||
6600 | static tree | |
94edc4ab | 6601 | cp_parser_conversion_function_id (cp_parser* parser) |
a723baf1 MM |
6602 | { |
6603 | tree type; | |
6604 | tree saved_scope; | |
6605 | tree saved_qualifying_scope; | |
6606 | tree saved_object_scope; | |
6607 | ||
6608 | /* Look for the `operator' token. */ | |
6609 | if (!cp_parser_require_keyword (parser, RID_OPERATOR, "`operator'")) | |
6610 | return error_mark_node; | |
6611 | /* When we parse the conversion-type-id, the current scope will be | |
6612 | reset. However, we need that information in able to look up the | |
6613 | conversion function later, so we save it here. */ | |
6614 | saved_scope = parser->scope; | |
6615 | saved_qualifying_scope = parser->qualifying_scope; | |
6616 | saved_object_scope = parser->object_scope; | |
6617 | /* We must enter the scope of the class so that the names of | |
6618 | entities declared within the class are available in the | |
6619 | conversion-type-id. For example, consider: | |
6620 | ||
6621 | struct S { | |
6622 | typedef int I; | |
6623 | operator I(); | |
6624 | }; | |
6625 | ||
6626 | S::operator I() { ... } | |
6627 | ||
6628 | In order to see that `I' is a type-name in the definition, we | |
6629 | must be in the scope of `S'. */ | |
6630 | if (saved_scope) | |
6631 | push_scope (saved_scope); | |
6632 | /* Parse the conversion-type-id. */ | |
6633 | type = cp_parser_conversion_type_id (parser); | |
6634 | /* Leave the scope of the class, if any. */ | |
6635 | if (saved_scope) | |
6636 | pop_scope (saved_scope); | |
6637 | /* Restore the saved scope. */ | |
6638 | parser->scope = saved_scope; | |
6639 | parser->qualifying_scope = saved_qualifying_scope; | |
6640 | parser->object_scope = saved_object_scope; | |
6641 | /* If the TYPE is invalid, indicate failure. */ | |
6642 | if (type == error_mark_node) | |
6643 | return error_mark_node; | |
6644 | return mangle_conv_op_name_for_type (type); | |
6645 | } | |
6646 | ||
6647 | /* Parse a conversion-type-id: | |
6648 | ||
6649 | conversion-type-id: | |
6650 | type-specifier-seq conversion-declarator [opt] | |
6651 | ||
6652 | Returns the TYPE specified. */ | |
6653 | ||
6654 | static tree | |
94edc4ab | 6655 | cp_parser_conversion_type_id (cp_parser* parser) |
a723baf1 MM |
6656 | { |
6657 | tree attributes; | |
6658 | tree type_specifiers; | |
6659 | tree declarator; | |
6660 | ||
6661 | /* Parse the attributes. */ | |
6662 | attributes = cp_parser_attributes_opt (parser); | |
6663 | /* Parse the type-specifiers. */ | |
6664 | type_specifiers = cp_parser_type_specifier_seq (parser); | |
6665 | /* If that didn't work, stop. */ | |
6666 | if (type_specifiers == error_mark_node) | |
6667 | return error_mark_node; | |
6668 | /* Parse the conversion-declarator. */ | |
6669 | declarator = cp_parser_conversion_declarator_opt (parser); | |
6670 | ||
6671 | return grokdeclarator (declarator, type_specifiers, TYPENAME, | |
6672 | /*initialized=*/0, &attributes); | |
6673 | } | |
6674 | ||
6675 | /* Parse an (optional) conversion-declarator. | |
6676 | ||
6677 | conversion-declarator: | |
6678 | ptr-operator conversion-declarator [opt] | |
6679 | ||
6680 | Returns a representation of the declarator. See | |
6681 | cp_parser_declarator for details. */ | |
6682 | ||
6683 | static tree | |
94edc4ab | 6684 | cp_parser_conversion_declarator_opt (cp_parser* parser) |
a723baf1 MM |
6685 | { |
6686 | enum tree_code code; | |
6687 | tree class_type; | |
6688 | tree cv_qualifier_seq; | |
6689 | ||
6690 | /* We don't know if there's a ptr-operator next, or not. */ | |
6691 | cp_parser_parse_tentatively (parser); | |
6692 | /* Try the ptr-operator. */ | |
6693 | code = cp_parser_ptr_operator (parser, &class_type, | |
6694 | &cv_qualifier_seq); | |
6695 | /* If it worked, look for more conversion-declarators. */ | |
6696 | if (cp_parser_parse_definitely (parser)) | |
6697 | { | |
6698 | tree declarator; | |
6699 | ||
6700 | /* Parse another optional declarator. */ | |
6701 | declarator = cp_parser_conversion_declarator_opt (parser); | |
6702 | ||
6703 | /* Create the representation of the declarator. */ | |
6704 | if (code == INDIRECT_REF) | |
6705 | declarator = make_pointer_declarator (cv_qualifier_seq, | |
6706 | declarator); | |
6707 | else | |
6708 | declarator = make_reference_declarator (cv_qualifier_seq, | |
6709 | declarator); | |
6710 | ||
6711 | /* Handle the pointer-to-member case. */ | |
6712 | if (class_type) | |
6713 | declarator = build_nt (SCOPE_REF, class_type, declarator); | |
6714 | ||
6715 | return declarator; | |
6716 | } | |
6717 | ||
6718 | return NULL_TREE; | |
6719 | } | |
6720 | ||
6721 | /* Parse an (optional) ctor-initializer. | |
6722 | ||
6723 | ctor-initializer: | |
6724 | : mem-initializer-list | |
6725 | ||
6726 | Returns TRUE iff the ctor-initializer was actually present. */ | |
6727 | ||
6728 | static bool | |
94edc4ab | 6729 | cp_parser_ctor_initializer_opt (cp_parser* parser) |
a723baf1 MM |
6730 | { |
6731 | /* If the next token is not a `:', then there is no | |
6732 | ctor-initializer. */ | |
6733 | if (cp_lexer_next_token_is_not (parser->lexer, CPP_COLON)) | |
6734 | { | |
6735 | /* Do default initialization of any bases and members. */ | |
6736 | if (DECL_CONSTRUCTOR_P (current_function_decl)) | |
6737 | finish_mem_initializers (NULL_TREE); | |
6738 | ||
6739 | return false; | |
6740 | } | |
6741 | ||
6742 | /* Consume the `:' token. */ | |
6743 | cp_lexer_consume_token (parser->lexer); | |
6744 | /* And the mem-initializer-list. */ | |
6745 | cp_parser_mem_initializer_list (parser); | |
6746 | ||
6747 | return true; | |
6748 | } | |
6749 | ||
6750 | /* Parse a mem-initializer-list. | |
6751 | ||
6752 | mem-initializer-list: | |
6753 | mem-initializer | |
6754 | mem-initializer , mem-initializer-list */ | |
6755 | ||
6756 | static void | |
94edc4ab | 6757 | cp_parser_mem_initializer_list (cp_parser* parser) |
a723baf1 MM |
6758 | { |
6759 | tree mem_initializer_list = NULL_TREE; | |
6760 | ||
6761 | /* Let the semantic analysis code know that we are starting the | |
6762 | mem-initializer-list. */ | |
0e136342 MM |
6763 | if (!DECL_CONSTRUCTOR_P (current_function_decl)) |
6764 | error ("only constructors take base initializers"); | |
a723baf1 MM |
6765 | |
6766 | /* Loop through the list. */ | |
6767 | while (true) | |
6768 | { | |
6769 | tree mem_initializer; | |
6770 | ||
6771 | /* Parse the mem-initializer. */ | |
6772 | mem_initializer = cp_parser_mem_initializer (parser); | |
6773 | /* Add it to the list, unless it was erroneous. */ | |
6774 | if (mem_initializer) | |
6775 | { | |
6776 | TREE_CHAIN (mem_initializer) = mem_initializer_list; | |
6777 | mem_initializer_list = mem_initializer; | |
6778 | } | |
6779 | /* If the next token is not a `,', we're done. */ | |
6780 | if (cp_lexer_next_token_is_not (parser->lexer, CPP_COMMA)) | |
6781 | break; | |
6782 | /* Consume the `,' token. */ | |
6783 | cp_lexer_consume_token (parser->lexer); | |
6784 | } | |
6785 | ||
6786 | /* Perform semantic analysis. */ | |
0e136342 MM |
6787 | if (DECL_CONSTRUCTOR_P (current_function_decl)) |
6788 | finish_mem_initializers (mem_initializer_list); | |
a723baf1 MM |
6789 | } |
6790 | ||
6791 | /* Parse a mem-initializer. | |
6792 | ||
6793 | mem-initializer: | |
6794 | mem-initializer-id ( expression-list [opt] ) | |
6795 | ||
6796 | GNU extension: | |
6797 | ||
6798 | mem-initializer: | |
34cd5ae7 | 6799 | ( expression-list [opt] ) |
a723baf1 MM |
6800 | |
6801 | Returns a TREE_LIST. The TREE_PURPOSE is the TYPE (for a base | |
6802 | class) or FIELD_DECL (for a non-static data member) to initialize; | |
6803 | the TREE_VALUE is the expression-list. */ | |
6804 | ||
6805 | static tree | |
94edc4ab | 6806 | cp_parser_mem_initializer (cp_parser* parser) |
a723baf1 MM |
6807 | { |
6808 | tree mem_initializer_id; | |
6809 | tree expression_list; | |
1f5a253a NS |
6810 | tree member; |
6811 | ||
a723baf1 MM |
6812 | /* Find out what is being initialized. */ |
6813 | if (cp_lexer_next_token_is (parser->lexer, CPP_OPEN_PAREN)) | |
6814 | { | |
6815 | pedwarn ("anachronistic old-style base class initializer"); | |
6816 | mem_initializer_id = NULL_TREE; | |
6817 | } | |
6818 | else | |
6819 | mem_initializer_id = cp_parser_mem_initializer_id (parser); | |
1f5a253a NS |
6820 | member = expand_member_init (mem_initializer_id); |
6821 | if (member && !DECL_P (member)) | |
6822 | in_base_initializer = 1; | |
7efa3e22 | 6823 | |
39703eb9 MM |
6824 | expression_list |
6825 | = cp_parser_parenthesized_expression_list (parser, false, | |
6826 | /*non_constant_p=*/NULL); | |
7efa3e22 | 6827 | if (!expression_list) |
a723baf1 | 6828 | expression_list = void_type_node; |
a723baf1 | 6829 | |
1f5a253a NS |
6830 | in_base_initializer = 0; |
6831 | ||
6832 | return member ? build_tree_list (member, expression_list) : NULL_TREE; | |
a723baf1 MM |
6833 | } |
6834 | ||
6835 | /* Parse a mem-initializer-id. | |
6836 | ||
6837 | mem-initializer-id: | |
6838 | :: [opt] nested-name-specifier [opt] class-name | |
6839 | identifier | |
6840 | ||
6841 | Returns a TYPE indicating the class to be initializer for the first | |
6842 | production. Returns an IDENTIFIER_NODE indicating the data member | |
6843 | to be initialized for the second production. */ | |
6844 | ||
6845 | static tree | |
94edc4ab | 6846 | cp_parser_mem_initializer_id (cp_parser* parser) |
a723baf1 MM |
6847 | { |
6848 | bool global_scope_p; | |
6849 | bool nested_name_specifier_p; | |
6850 | tree id; | |
6851 | ||
6852 | /* Look for the optional `::' operator. */ | |
6853 | global_scope_p | |
6854 | = (cp_parser_global_scope_opt (parser, | |
6855 | /*current_scope_valid_p=*/false) | |
6856 | != NULL_TREE); | |
6857 | /* Look for the optional nested-name-specifier. The simplest way to | |
6858 | implement: | |
6859 | ||
6860 | [temp.res] | |
6861 | ||
6862 | The keyword `typename' is not permitted in a base-specifier or | |
6863 | mem-initializer; in these contexts a qualified name that | |
6864 | depends on a template-parameter is implicitly assumed to be a | |
6865 | type name. | |
6866 | ||
6867 | is to assume that we have seen the `typename' keyword at this | |
6868 | point. */ | |
6869 | nested_name_specifier_p | |
6870 | = (cp_parser_nested_name_specifier_opt (parser, | |
6871 | /*typename_keyword_p=*/true, | |
6872 | /*check_dependency_p=*/true, | |
6873 | /*type_p=*/true) | |
6874 | != NULL_TREE); | |
6875 | /* If there is a `::' operator or a nested-name-specifier, then we | |
6876 | are definitely looking for a class-name. */ | |
6877 | if (global_scope_p || nested_name_specifier_p) | |
6878 | return cp_parser_class_name (parser, | |
6879 | /*typename_keyword_p=*/true, | |
6880 | /*template_keyword_p=*/false, | |
6881 | /*type_p=*/false, | |
a723baf1 MM |
6882 | /*check_dependency_p=*/true, |
6883 | /*class_head_p=*/false); | |
6884 | /* Otherwise, we could also be looking for an ordinary identifier. */ | |
6885 | cp_parser_parse_tentatively (parser); | |
6886 | /* Try a class-name. */ | |
6887 | id = cp_parser_class_name (parser, | |
6888 | /*typename_keyword_p=*/true, | |
6889 | /*template_keyword_p=*/false, | |
6890 | /*type_p=*/false, | |
a723baf1 MM |
6891 | /*check_dependency_p=*/true, |
6892 | /*class_head_p=*/false); | |
6893 | /* If we found one, we're done. */ | |
6894 | if (cp_parser_parse_definitely (parser)) | |
6895 | return id; | |
6896 | /* Otherwise, look for an ordinary identifier. */ | |
6897 | return cp_parser_identifier (parser); | |
6898 | } | |
6899 | ||
6900 | /* Overloading [gram.over] */ | |
6901 | ||
6902 | /* Parse an operator-function-id. | |
6903 | ||
6904 | operator-function-id: | |
6905 | operator operator | |
6906 | ||
6907 | Returns an IDENTIFIER_NODE for the operator which is a | |
6908 | human-readable spelling of the identifier, e.g., `operator +'. */ | |
6909 | ||
6910 | static tree | |
94edc4ab | 6911 | cp_parser_operator_function_id (cp_parser* parser) |
a723baf1 MM |
6912 | { |
6913 | /* Look for the `operator' keyword. */ | |
6914 | if (!cp_parser_require_keyword (parser, RID_OPERATOR, "`operator'")) | |
6915 | return error_mark_node; | |
6916 | /* And then the name of the operator itself. */ | |
6917 | return cp_parser_operator (parser); | |
6918 | } | |
6919 | ||
6920 | /* Parse an operator. | |
6921 | ||
6922 | operator: | |
6923 | new delete new[] delete[] + - * / % ^ & | ~ ! = < > | |
6924 | += -= *= /= %= ^= &= |= << >> >>= <<= == != <= >= && | |
6925 | || ++ -- , ->* -> () [] | |
6926 | ||
6927 | GNU Extensions: | |
6928 | ||
6929 | operator: | |
6930 | <? >? <?= >?= | |
6931 | ||
6932 | Returns an IDENTIFIER_NODE for the operator which is a | |
6933 | human-readable spelling of the identifier, e.g., `operator +'. */ | |
6934 | ||
6935 | static tree | |
94edc4ab | 6936 | cp_parser_operator (cp_parser* parser) |
a723baf1 MM |
6937 | { |
6938 | tree id = NULL_TREE; | |
6939 | cp_token *token; | |
6940 | ||
6941 | /* Peek at the next token. */ | |
6942 | token = cp_lexer_peek_token (parser->lexer); | |
6943 | /* Figure out which operator we have. */ | |
6944 | switch (token->type) | |
6945 | { | |
6946 | case CPP_KEYWORD: | |
6947 | { | |
6948 | enum tree_code op; | |
6949 | ||
6950 | /* The keyword should be either `new' or `delete'. */ | |
6951 | if (token->keyword == RID_NEW) | |
6952 | op = NEW_EXPR; | |
6953 | else if (token->keyword == RID_DELETE) | |
6954 | op = DELETE_EXPR; | |
6955 | else | |
6956 | break; | |
6957 | ||
6958 | /* Consume the `new' or `delete' token. */ | |
6959 | cp_lexer_consume_token (parser->lexer); | |
6960 | ||
6961 | /* Peek at the next token. */ | |
6962 | token = cp_lexer_peek_token (parser->lexer); | |
6963 | /* If it's a `[' token then this is the array variant of the | |
6964 | operator. */ | |
6965 | if (token->type == CPP_OPEN_SQUARE) | |
6966 | { | |
6967 | /* Consume the `[' token. */ | |
6968 | cp_lexer_consume_token (parser->lexer); | |
6969 | /* Look for the `]' token. */ | |
6970 | cp_parser_require (parser, CPP_CLOSE_SQUARE, "`]'"); | |
6971 | id = ansi_opname (op == NEW_EXPR | |
6972 | ? VEC_NEW_EXPR : VEC_DELETE_EXPR); | |
6973 | } | |
6974 | /* Otherwise, we have the non-array variant. */ | |
6975 | else | |
6976 | id = ansi_opname (op); | |
6977 | ||
6978 | return id; | |
6979 | } | |
6980 | ||
6981 | case CPP_PLUS: | |
6982 | id = ansi_opname (PLUS_EXPR); | |
6983 | break; | |
6984 | ||
6985 | case CPP_MINUS: | |
6986 | id = ansi_opname (MINUS_EXPR); | |
6987 | break; | |
6988 | ||
6989 | case CPP_MULT: | |
6990 | id = ansi_opname (MULT_EXPR); | |
6991 | break; | |
6992 | ||
6993 | case CPP_DIV: | |
6994 | id = ansi_opname (TRUNC_DIV_EXPR); | |
6995 | break; | |
6996 | ||
6997 | case CPP_MOD: | |
6998 | id = ansi_opname (TRUNC_MOD_EXPR); | |
6999 | break; | |
7000 | ||
7001 | case CPP_XOR: | |
7002 | id = ansi_opname (BIT_XOR_EXPR); | |
7003 | break; | |
7004 | ||
7005 | case CPP_AND: | |
7006 | id = ansi_opname (BIT_AND_EXPR); | |
7007 | break; | |
7008 | ||
7009 | case CPP_OR: | |
7010 | id = ansi_opname (BIT_IOR_EXPR); | |
7011 | break; | |
7012 | ||
7013 | case CPP_COMPL: | |
7014 | id = ansi_opname (BIT_NOT_EXPR); | |
7015 | break; | |
7016 | ||
7017 | case CPP_NOT: | |
7018 | id = ansi_opname (TRUTH_NOT_EXPR); | |
7019 | break; | |
7020 | ||
7021 | case CPP_EQ: | |
7022 | id = ansi_assopname (NOP_EXPR); | |
7023 | break; | |
7024 | ||
7025 | case CPP_LESS: | |
7026 | id = ansi_opname (LT_EXPR); | |
7027 | break; | |
7028 | ||
7029 | case CPP_GREATER: | |
7030 | id = ansi_opname (GT_EXPR); | |
7031 | break; | |
7032 | ||
7033 | case CPP_PLUS_EQ: | |
7034 | id = ansi_assopname (PLUS_EXPR); | |
7035 | break; | |
7036 | ||
7037 | case CPP_MINUS_EQ: | |
7038 | id = ansi_assopname (MINUS_EXPR); | |
7039 | break; | |
7040 | ||
7041 | case CPP_MULT_EQ: | |
7042 | id = ansi_assopname (MULT_EXPR); | |
7043 | break; | |
7044 | ||
7045 | case CPP_DIV_EQ: | |
7046 | id = ansi_assopname (TRUNC_DIV_EXPR); | |
7047 | break; | |
7048 | ||
7049 | case CPP_MOD_EQ: | |
7050 | id = ansi_assopname (TRUNC_MOD_EXPR); | |
7051 | break; | |
7052 | ||
7053 | case CPP_XOR_EQ: | |
7054 | id = ansi_assopname (BIT_XOR_EXPR); | |
7055 | break; | |
7056 | ||
7057 | case CPP_AND_EQ: | |
7058 | id = ansi_assopname (BIT_AND_EXPR); | |
7059 | break; | |
7060 | ||
7061 | case CPP_OR_EQ: | |
7062 | id = ansi_assopname (BIT_IOR_EXPR); | |
7063 | break; | |
7064 | ||
7065 | case CPP_LSHIFT: | |
7066 | id = ansi_opname (LSHIFT_EXPR); | |
7067 | break; | |
7068 | ||
7069 | case CPP_RSHIFT: | |
7070 | id = ansi_opname (RSHIFT_EXPR); | |
7071 | break; | |
7072 | ||
7073 | case CPP_LSHIFT_EQ: | |
7074 | id = ansi_assopname (LSHIFT_EXPR); | |
7075 | break; | |
7076 | ||
7077 | case CPP_RSHIFT_EQ: | |
7078 | id = ansi_assopname (RSHIFT_EXPR); | |
7079 | break; | |
7080 | ||
7081 | case CPP_EQ_EQ: | |
7082 | id = ansi_opname (EQ_EXPR); | |
7083 | break; | |
7084 | ||
7085 | case CPP_NOT_EQ: | |
7086 | id = ansi_opname (NE_EXPR); | |
7087 | break; | |
7088 | ||
7089 | case CPP_LESS_EQ: | |
7090 | id = ansi_opname (LE_EXPR); | |
7091 | break; | |
7092 | ||
7093 | case CPP_GREATER_EQ: | |
7094 | id = ansi_opname (GE_EXPR); | |
7095 | break; | |
7096 | ||
7097 | case CPP_AND_AND: | |
7098 | id = ansi_opname (TRUTH_ANDIF_EXPR); | |
7099 | break; | |
7100 | ||
7101 | case CPP_OR_OR: | |
7102 | id = ansi_opname (TRUTH_ORIF_EXPR); | |
7103 | break; | |
7104 | ||
7105 | case CPP_PLUS_PLUS: | |
7106 | id = ansi_opname (POSTINCREMENT_EXPR); | |
7107 | break; | |
7108 | ||
7109 | case CPP_MINUS_MINUS: | |
7110 | id = ansi_opname (PREDECREMENT_EXPR); | |
7111 | break; | |
7112 | ||
7113 | case CPP_COMMA: | |
7114 | id = ansi_opname (COMPOUND_EXPR); | |
7115 | break; | |
7116 | ||
7117 | case CPP_DEREF_STAR: | |
7118 | id = ansi_opname (MEMBER_REF); | |
7119 | break; | |
7120 | ||
7121 | case CPP_DEREF: | |
7122 | id = ansi_opname (COMPONENT_REF); | |
7123 | break; | |
7124 | ||
7125 | case CPP_OPEN_PAREN: | |
7126 | /* Consume the `('. */ | |
7127 | cp_lexer_consume_token (parser->lexer); | |
7128 | /* Look for the matching `)'. */ | |
7129 | cp_parser_require (parser, CPP_CLOSE_PAREN, "`)'"); | |
7130 | return ansi_opname (CALL_EXPR); | |
7131 | ||
7132 | case CPP_OPEN_SQUARE: | |
7133 | /* Consume the `['. */ | |
7134 | cp_lexer_consume_token (parser->lexer); | |
7135 | /* Look for the matching `]'. */ | |
7136 | cp_parser_require (parser, CPP_CLOSE_SQUARE, "`]'"); | |
7137 | return ansi_opname (ARRAY_REF); | |
7138 | ||
7139 | /* Extensions. */ | |
7140 | case CPP_MIN: | |
7141 | id = ansi_opname (MIN_EXPR); | |
7142 | break; | |
7143 | ||
7144 | case CPP_MAX: | |
7145 | id = ansi_opname (MAX_EXPR); | |
7146 | break; | |
7147 | ||
7148 | case CPP_MIN_EQ: | |
7149 | id = ansi_assopname (MIN_EXPR); | |
7150 | break; | |
7151 | ||
7152 | case CPP_MAX_EQ: | |
7153 | id = ansi_assopname (MAX_EXPR); | |
7154 | break; | |
7155 | ||
7156 | default: | |
7157 | /* Anything else is an error. */ | |
7158 | break; | |
7159 | } | |
7160 | ||
7161 | /* If we have selected an identifier, we need to consume the | |
7162 | operator token. */ | |
7163 | if (id) | |
7164 | cp_lexer_consume_token (parser->lexer); | |
7165 | /* Otherwise, no valid operator name was present. */ | |
7166 | else | |
7167 | { | |
7168 | cp_parser_error (parser, "expected operator"); | |
7169 | id = error_mark_node; | |
7170 | } | |
7171 | ||
7172 | return id; | |
7173 | } | |
7174 | ||
7175 | /* Parse a template-declaration. | |
7176 | ||
7177 | template-declaration: | |
7178 | export [opt] template < template-parameter-list > declaration | |
7179 | ||
7180 | If MEMBER_P is TRUE, this template-declaration occurs within a | |
7181 | class-specifier. | |
7182 | ||
7183 | The grammar rule given by the standard isn't correct. What | |
7184 | is really meant is: | |
7185 | ||
7186 | template-declaration: | |
7187 | export [opt] template-parameter-list-seq | |
7188 | decl-specifier-seq [opt] init-declarator [opt] ; | |
7189 | export [opt] template-parameter-list-seq | |
7190 | function-definition | |
7191 | ||
7192 | template-parameter-list-seq: | |
7193 | template-parameter-list-seq [opt] | |
7194 | template < template-parameter-list > */ | |
7195 | ||
7196 | static void | |
94edc4ab | 7197 | cp_parser_template_declaration (cp_parser* parser, bool member_p) |
a723baf1 MM |
7198 | { |
7199 | /* Check for `export'. */ | |
7200 | if (cp_lexer_next_token_is_keyword (parser->lexer, RID_EXPORT)) | |
7201 | { | |
7202 | /* Consume the `export' token. */ | |
7203 | cp_lexer_consume_token (parser->lexer); | |
7204 | /* Warn that we do not support `export'. */ | |
7205 | warning ("keyword `export' not implemented, and will be ignored"); | |
7206 | } | |
7207 | ||
7208 | cp_parser_template_declaration_after_export (parser, member_p); | |
7209 | } | |
7210 | ||
7211 | /* Parse a template-parameter-list. | |
7212 | ||
7213 | template-parameter-list: | |
7214 | template-parameter | |
7215 | template-parameter-list , template-parameter | |
7216 | ||
7217 | Returns a TREE_LIST. Each node represents a template parameter. | |
7218 | The nodes are connected via their TREE_CHAINs. */ | |
7219 | ||
7220 | static tree | |
94edc4ab | 7221 | cp_parser_template_parameter_list (cp_parser* parser) |
a723baf1 MM |
7222 | { |
7223 | tree parameter_list = NULL_TREE; | |
7224 | ||
7225 | while (true) | |
7226 | { | |
7227 | tree parameter; | |
7228 | cp_token *token; | |
7229 | ||
7230 | /* Parse the template-parameter. */ | |
7231 | parameter = cp_parser_template_parameter (parser); | |
7232 | /* Add it to the list. */ | |
7233 | parameter_list = process_template_parm (parameter_list, | |
7234 | parameter); | |
7235 | ||
7236 | /* Peek at the next token. */ | |
7237 | token = cp_lexer_peek_token (parser->lexer); | |
7238 | /* If it's not a `,', we're done. */ | |
7239 | if (token->type != CPP_COMMA) | |
7240 | break; | |
7241 | /* Otherwise, consume the `,' token. */ | |
7242 | cp_lexer_consume_token (parser->lexer); | |
7243 | } | |
7244 | ||
7245 | return parameter_list; | |
7246 | } | |
7247 | ||
7248 | /* Parse a template-parameter. | |
7249 | ||
7250 | template-parameter: | |
7251 | type-parameter | |
7252 | parameter-declaration | |
7253 | ||
7254 | Returns a TREE_LIST. The TREE_VALUE represents the parameter. The | |
7255 | TREE_PURPOSE is the default value, if any. */ | |
7256 | ||
7257 | static tree | |
94edc4ab | 7258 | cp_parser_template_parameter (cp_parser* parser) |
a723baf1 MM |
7259 | { |
7260 | cp_token *token; | |
7261 | ||
7262 | /* Peek at the next token. */ | |
7263 | token = cp_lexer_peek_token (parser->lexer); | |
7264 | /* If it is `class' or `template', we have a type-parameter. */ | |
7265 | if (token->keyword == RID_TEMPLATE) | |
7266 | return cp_parser_type_parameter (parser); | |
7267 | /* If it is `class' or `typename' we do not know yet whether it is a | |
7268 | type parameter or a non-type parameter. Consider: | |
7269 | ||
7270 | template <typename T, typename T::X X> ... | |
7271 | ||
7272 | or: | |
7273 | ||
7274 | template <class C, class D*> ... | |
7275 | ||
7276 | Here, the first parameter is a type parameter, and the second is | |
7277 | a non-type parameter. We can tell by looking at the token after | |
7278 | the identifier -- if it is a `,', `=', or `>' then we have a type | |
7279 | parameter. */ | |
7280 | if (token->keyword == RID_TYPENAME || token->keyword == RID_CLASS) | |
7281 | { | |
7282 | /* Peek at the token after `class' or `typename'. */ | |
7283 | token = cp_lexer_peek_nth_token (parser->lexer, 2); | |
7284 | /* If it's an identifier, skip it. */ | |
7285 | if (token->type == CPP_NAME) | |
7286 | token = cp_lexer_peek_nth_token (parser->lexer, 3); | |
7287 | /* Now, see if the token looks like the end of a template | |
7288 | parameter. */ | |
7289 | if (token->type == CPP_COMMA | |
7290 | || token->type == CPP_EQ | |
7291 | || token->type == CPP_GREATER) | |
7292 | return cp_parser_type_parameter (parser); | |
7293 | } | |
7294 | ||
7295 | /* Otherwise, it is a non-type parameter. | |
7296 | ||
7297 | [temp.param] | |
7298 | ||
7299 | When parsing a default template-argument for a non-type | |
7300 | template-parameter, the first non-nested `>' is taken as the end | |
7301 | of the template parameter-list rather than a greater-than | |
7302 | operator. */ | |
7303 | return | |
ec194454 | 7304 | cp_parser_parameter_declaration (parser, /*template_parm_p=*/true); |
a723baf1 MM |
7305 | } |
7306 | ||
7307 | /* Parse a type-parameter. | |
7308 | ||
7309 | type-parameter: | |
7310 | class identifier [opt] | |
7311 | class identifier [opt] = type-id | |
7312 | typename identifier [opt] | |
7313 | typename identifier [opt] = type-id | |
7314 | template < template-parameter-list > class identifier [opt] | |
7315 | template < template-parameter-list > class identifier [opt] | |
7316 | = id-expression | |
7317 | ||
7318 | Returns a TREE_LIST. The TREE_VALUE is itself a TREE_LIST. The | |
7319 | TREE_PURPOSE is the default-argument, if any. The TREE_VALUE is | |
7320 | the declaration of the parameter. */ | |
7321 | ||
7322 | static tree | |
94edc4ab | 7323 | cp_parser_type_parameter (cp_parser* parser) |
a723baf1 MM |
7324 | { |
7325 | cp_token *token; | |
7326 | tree parameter; | |
7327 | ||
7328 | /* Look for a keyword to tell us what kind of parameter this is. */ | |
7329 | token = cp_parser_require (parser, CPP_KEYWORD, | |
8a6393df | 7330 | "`class', `typename', or `template'"); |
a723baf1 MM |
7331 | if (!token) |
7332 | return error_mark_node; | |
7333 | ||
7334 | switch (token->keyword) | |
7335 | { | |
7336 | case RID_CLASS: | |
7337 | case RID_TYPENAME: | |
7338 | { | |
7339 | tree identifier; | |
7340 | tree default_argument; | |
7341 | ||
7342 | /* If the next token is an identifier, then it names the | |
7343 | parameter. */ | |
7344 | if (cp_lexer_next_token_is (parser->lexer, CPP_NAME)) | |
7345 | identifier = cp_parser_identifier (parser); | |
7346 | else | |
7347 | identifier = NULL_TREE; | |
7348 | ||
7349 | /* Create the parameter. */ | |
7350 | parameter = finish_template_type_parm (class_type_node, identifier); | |
7351 | ||
7352 | /* If the next token is an `=', we have a default argument. */ | |
7353 | if (cp_lexer_next_token_is (parser->lexer, CPP_EQ)) | |
7354 | { | |
7355 | /* Consume the `=' token. */ | |
7356 | cp_lexer_consume_token (parser->lexer); | |
34cd5ae7 | 7357 | /* Parse the default-argument. */ |
a723baf1 MM |
7358 | default_argument = cp_parser_type_id (parser); |
7359 | } | |
7360 | else | |
7361 | default_argument = NULL_TREE; | |
7362 | ||
7363 | /* Create the combined representation of the parameter and the | |
7364 | default argument. */ | |
c67d36d0 | 7365 | parameter = build_tree_list (default_argument, parameter); |
a723baf1 MM |
7366 | } |
7367 | break; | |
7368 | ||
7369 | case RID_TEMPLATE: | |
7370 | { | |
7371 | tree parameter_list; | |
7372 | tree identifier; | |
7373 | tree default_argument; | |
7374 | ||
7375 | /* Look for the `<'. */ | |
7376 | cp_parser_require (parser, CPP_LESS, "`<'"); | |
7377 | /* Parse the template-parameter-list. */ | |
7378 | begin_template_parm_list (); | |
7379 | parameter_list | |
7380 | = cp_parser_template_parameter_list (parser); | |
7381 | parameter_list = end_template_parm_list (parameter_list); | |
7382 | /* Look for the `>'. */ | |
7383 | cp_parser_require (parser, CPP_GREATER, "`>'"); | |
7384 | /* Look for the `class' keyword. */ | |
7385 | cp_parser_require_keyword (parser, RID_CLASS, "`class'"); | |
7386 | /* If the next token is an `=', then there is a | |
7387 | default-argument. If the next token is a `>', we are at | |
7388 | the end of the parameter-list. If the next token is a `,', | |
7389 | then we are at the end of this parameter. */ | |
7390 | if (cp_lexer_next_token_is_not (parser->lexer, CPP_EQ) | |
7391 | && cp_lexer_next_token_is_not (parser->lexer, CPP_GREATER) | |
7392 | && cp_lexer_next_token_is_not (parser->lexer, CPP_COMMA)) | |
7393 | identifier = cp_parser_identifier (parser); | |
7394 | else | |
7395 | identifier = NULL_TREE; | |
7396 | /* Create the template parameter. */ | |
7397 | parameter = finish_template_template_parm (class_type_node, | |
7398 | identifier); | |
7399 | ||
7400 | /* If the next token is an `=', then there is a | |
7401 | default-argument. */ | |
7402 | if (cp_lexer_next_token_is (parser->lexer, CPP_EQ)) | |
7403 | { | |
7404 | /* Consume the `='. */ | |
7405 | cp_lexer_consume_token (parser->lexer); | |
7406 | /* Parse the id-expression. */ | |
7407 | default_argument | |
7408 | = cp_parser_id_expression (parser, | |
7409 | /*template_keyword_p=*/false, | |
7410 | /*check_dependency_p=*/true, | |
f3c2dfc6 MM |
7411 | /*template_p=*/NULL, |
7412 | /*declarator_p=*/false); | |
a723baf1 MM |
7413 | /* Look up the name. */ |
7414 | default_argument | |
7415 | = cp_parser_lookup_name_simple (parser, default_argument); | |
7416 | /* See if the default argument is valid. */ | |
7417 | default_argument | |
7418 | = check_template_template_default_arg (default_argument); | |
7419 | } | |
7420 | else | |
7421 | default_argument = NULL_TREE; | |
7422 | ||
7423 | /* Create the combined representation of the parameter and the | |
7424 | default argument. */ | |
c67d36d0 | 7425 | parameter = build_tree_list (default_argument, parameter); |
a723baf1 MM |
7426 | } |
7427 | break; | |
7428 | ||
7429 | default: | |
7430 | /* Anything else is an error. */ | |
7431 | cp_parser_error (parser, | |
7432 | "expected `class', `typename', or `template'"); | |
7433 | parameter = error_mark_node; | |
7434 | } | |
7435 | ||
7436 | return parameter; | |
7437 | } | |
7438 | ||
7439 | /* Parse a template-id. | |
7440 | ||
7441 | template-id: | |
7442 | template-name < template-argument-list [opt] > | |
7443 | ||
7444 | If TEMPLATE_KEYWORD_P is TRUE, then we have just seen the | |
7445 | `template' keyword. In this case, a TEMPLATE_ID_EXPR will be | |
7446 | returned. Otherwise, if the template-name names a function, or set | |
7447 | of functions, returns a TEMPLATE_ID_EXPR. If the template-name | |
7448 | names a class, returns a TYPE_DECL for the specialization. | |
7449 | ||
7450 | If CHECK_DEPENDENCY_P is FALSE, names are looked up in | |
7451 | uninstantiated templates. */ | |
7452 | ||
7453 | static tree | |
7454 | cp_parser_template_id (cp_parser *parser, | |
7455 | bool template_keyword_p, | |
7456 | bool check_dependency_p) | |
7457 | { | |
7458 | tree template; | |
7459 | tree arguments; | |
7460 | tree saved_scope; | |
7461 | tree saved_qualifying_scope; | |
7462 | tree saved_object_scope; | |
7463 | tree template_id; | |
7464 | bool saved_greater_than_is_operator_p; | |
7465 | ptrdiff_t start_of_id; | |
7466 | tree access_check = NULL_TREE; | |
2050a1bb | 7467 | cp_token *next_token; |
a723baf1 MM |
7468 | |
7469 | /* If the next token corresponds to a template-id, there is no need | |
7470 | to reparse it. */ | |
2050a1bb MM |
7471 | next_token = cp_lexer_peek_token (parser->lexer); |
7472 | if (next_token->type == CPP_TEMPLATE_ID) | |
a723baf1 MM |
7473 | { |
7474 | tree value; | |
7475 | tree check; | |
7476 | ||
7477 | /* Get the stored value. */ | |
7478 | value = cp_lexer_consume_token (parser->lexer)->value; | |
7479 | /* Perform any access checks that were deferred. */ | |
7480 | for (check = TREE_PURPOSE (value); check; check = TREE_CHAIN (check)) | |
cf22909c KL |
7481 | perform_or_defer_access_check (TREE_PURPOSE (check), |
7482 | TREE_VALUE (check)); | |
a723baf1 MM |
7483 | /* Return the stored value. */ |
7484 | return TREE_VALUE (value); | |
7485 | } | |
7486 | ||
2050a1bb MM |
7487 | /* Avoid performing name lookup if there is no possibility of |
7488 | finding a template-id. */ | |
7489 | if ((next_token->type != CPP_NAME && next_token->keyword != RID_OPERATOR) | |
7490 | || (next_token->type == CPP_NAME | |
7491 | && cp_lexer_peek_nth_token (parser->lexer, 2)->type != CPP_LESS)) | |
7492 | { | |
7493 | cp_parser_error (parser, "expected template-id"); | |
7494 | return error_mark_node; | |
7495 | } | |
7496 | ||
a723baf1 MM |
7497 | /* Remember where the template-id starts. */ |
7498 | if (cp_parser_parsing_tentatively (parser) | |
7499 | && !cp_parser_committed_to_tentative_parse (parser)) | |
7500 | { | |
2050a1bb | 7501 | next_token = cp_lexer_peek_token (parser->lexer); |
a723baf1 MM |
7502 | start_of_id = cp_lexer_token_difference (parser->lexer, |
7503 | parser->lexer->first_token, | |
7504 | next_token); | |
a723baf1 MM |
7505 | } |
7506 | else | |
7507 | start_of_id = -1; | |
7508 | ||
8d241e0b | 7509 | push_deferring_access_checks (dk_deferred); |
cf22909c | 7510 | |
a723baf1 MM |
7511 | /* Parse the template-name. */ |
7512 | template = cp_parser_template_name (parser, template_keyword_p, | |
7513 | check_dependency_p); | |
7514 | if (template == error_mark_node) | |
cf22909c KL |
7515 | { |
7516 | pop_deferring_access_checks (); | |
7517 | return error_mark_node; | |
7518 | } | |
a723baf1 MM |
7519 | |
7520 | /* Look for the `<' that starts the template-argument-list. */ | |
7521 | if (!cp_parser_require (parser, CPP_LESS, "`<'")) | |
cf22909c KL |
7522 | { |
7523 | pop_deferring_access_checks (); | |
7524 | return error_mark_node; | |
7525 | } | |
a723baf1 MM |
7526 | |
7527 | /* [temp.names] | |
7528 | ||
7529 | When parsing a template-id, the first non-nested `>' is taken as | |
7530 | the end of the template-argument-list rather than a greater-than | |
7531 | operator. */ | |
7532 | saved_greater_than_is_operator_p | |
7533 | = parser->greater_than_is_operator_p; | |
7534 | parser->greater_than_is_operator_p = false; | |
7535 | /* Parsing the argument list may modify SCOPE, so we save it | |
7536 | here. */ | |
7537 | saved_scope = parser->scope; | |
7538 | saved_qualifying_scope = parser->qualifying_scope; | |
7539 | saved_object_scope = parser->object_scope; | |
7540 | /* Parse the template-argument-list itself. */ | |
7541 | if (cp_lexer_next_token_is (parser->lexer, CPP_GREATER)) | |
7542 | arguments = NULL_TREE; | |
7543 | else | |
7544 | arguments = cp_parser_template_argument_list (parser); | |
7545 | /* Look for the `>' that ends the template-argument-list. */ | |
7546 | cp_parser_require (parser, CPP_GREATER, "`>'"); | |
7547 | /* The `>' token might be a greater-than operator again now. */ | |
7548 | parser->greater_than_is_operator_p | |
7549 | = saved_greater_than_is_operator_p; | |
7550 | /* Restore the SAVED_SCOPE. */ | |
7551 | parser->scope = saved_scope; | |
7552 | parser->qualifying_scope = saved_qualifying_scope; | |
7553 | parser->object_scope = saved_object_scope; | |
7554 | ||
7555 | /* Build a representation of the specialization. */ | |
7556 | if (TREE_CODE (template) == IDENTIFIER_NODE) | |
7557 | template_id = build_min_nt (TEMPLATE_ID_EXPR, template, arguments); | |
7558 | else if (DECL_CLASS_TEMPLATE_P (template) | |
7559 | || DECL_TEMPLATE_TEMPLATE_PARM_P (template)) | |
7560 | template_id | |
7561 | = finish_template_type (template, arguments, | |
7562 | cp_lexer_next_token_is (parser->lexer, | |
7563 | CPP_SCOPE)); | |
7564 | else | |
7565 | { | |
7566 | /* If it's not a class-template or a template-template, it should be | |
7567 | a function-template. */ | |
7568 | my_friendly_assert ((DECL_FUNCTION_TEMPLATE_P (template) | |
7569 | || TREE_CODE (template) == OVERLOAD | |
7570 | || BASELINK_P (template)), | |
7571 | 20010716); | |
7572 | ||
7573 | template_id = lookup_template_function (template, arguments); | |
7574 | } | |
7575 | ||
cf22909c KL |
7576 | /* Retrieve any deferred checks. Do not pop this access checks yet |
7577 | so the memory will not be reclaimed during token replacing below. */ | |
7578 | access_check = get_deferred_access_checks (); | |
7579 | ||
a723baf1 MM |
7580 | /* If parsing tentatively, replace the sequence of tokens that makes |
7581 | up the template-id with a CPP_TEMPLATE_ID token. That way, | |
7582 | should we re-parse the token stream, we will not have to repeat | |
7583 | the effort required to do the parse, nor will we issue duplicate | |
7584 | error messages about problems during instantiation of the | |
7585 | template. */ | |
7586 | if (start_of_id >= 0) | |
7587 | { | |
7588 | cp_token *token; | |
a723baf1 MM |
7589 | |
7590 | /* Find the token that corresponds to the start of the | |
7591 | template-id. */ | |
7592 | token = cp_lexer_advance_token (parser->lexer, | |
7593 | parser->lexer->first_token, | |
7594 | start_of_id); | |
7595 | ||
a723baf1 MM |
7596 | /* Reset the contents of the START_OF_ID token. */ |
7597 | token->type = CPP_TEMPLATE_ID; | |
7598 | token->value = build_tree_list (access_check, template_id); | |
7599 | token->keyword = RID_MAX; | |
7600 | /* Purge all subsequent tokens. */ | |
7601 | cp_lexer_purge_tokens_after (parser->lexer, token); | |
7602 | } | |
7603 | ||
cf22909c | 7604 | pop_deferring_access_checks (); |
a723baf1 MM |
7605 | return template_id; |
7606 | } | |
7607 | ||
7608 | /* Parse a template-name. | |
7609 | ||
7610 | template-name: | |
7611 | identifier | |
7612 | ||
7613 | The standard should actually say: | |
7614 | ||
7615 | template-name: | |
7616 | identifier | |
7617 | operator-function-id | |
7618 | conversion-function-id | |
7619 | ||
7620 | A defect report has been filed about this issue. | |
7621 | ||
7622 | If TEMPLATE_KEYWORD_P is true, then we have just seen the | |
7623 | `template' keyword, in a construction like: | |
7624 | ||
7625 | T::template f<3>() | |
7626 | ||
7627 | In that case `f' is taken to be a template-name, even though there | |
7628 | is no way of knowing for sure. | |
7629 | ||
7630 | Returns the TEMPLATE_DECL for the template, or an OVERLOAD if the | |
7631 | name refers to a set of overloaded functions, at least one of which | |
7632 | is a template, or an IDENTIFIER_NODE with the name of the template, | |
7633 | if TEMPLATE_KEYWORD_P is true. If CHECK_DEPENDENCY_P is FALSE, | |
7634 | names are looked up inside uninstantiated templates. */ | |
7635 | ||
7636 | static tree | |
94edc4ab NN |
7637 | cp_parser_template_name (cp_parser* parser, |
7638 | bool template_keyword_p, | |
7639 | bool check_dependency_p) | |
a723baf1 MM |
7640 | { |
7641 | tree identifier; | |
7642 | tree decl; | |
7643 | tree fns; | |
7644 | ||
7645 | /* If the next token is `operator', then we have either an | |
7646 | operator-function-id or a conversion-function-id. */ | |
7647 | if (cp_lexer_next_token_is_keyword (parser->lexer, RID_OPERATOR)) | |
7648 | { | |
7649 | /* We don't know whether we're looking at an | |
7650 | operator-function-id or a conversion-function-id. */ | |
7651 | cp_parser_parse_tentatively (parser); | |
7652 | /* Try an operator-function-id. */ | |
7653 | identifier = cp_parser_operator_function_id (parser); | |
7654 | /* If that didn't work, try a conversion-function-id. */ | |
7655 | if (!cp_parser_parse_definitely (parser)) | |
7656 | identifier = cp_parser_conversion_function_id (parser); | |
7657 | } | |
7658 | /* Look for the identifier. */ | |
7659 | else | |
7660 | identifier = cp_parser_identifier (parser); | |
7661 | ||
7662 | /* If we didn't find an identifier, we don't have a template-id. */ | |
7663 | if (identifier == error_mark_node) | |
7664 | return error_mark_node; | |
7665 | ||
7666 | /* If the name immediately followed the `template' keyword, then it | |
7667 | is a template-name. However, if the next token is not `<', then | |
7668 | we do not treat it as a template-name, since it is not being used | |
7669 | as part of a template-id. This enables us to handle constructs | |
7670 | like: | |
7671 | ||
7672 | template <typename T> struct S { S(); }; | |
7673 | template <typename T> S<T>::S(); | |
7674 | ||
7675 | correctly. We would treat `S' as a template -- if it were `S<T>' | |
7676 | -- but we do not if there is no `<'. */ | |
7677 | if (template_keyword_p && processing_template_decl | |
7678 | && cp_lexer_next_token_is (parser->lexer, CPP_LESS)) | |
7679 | return identifier; | |
7680 | ||
7681 | /* Look up the name. */ | |
7682 | decl = cp_parser_lookup_name (parser, identifier, | |
a723baf1 | 7683 | /*is_type=*/false, |
eea9800f | 7684 | /*is_namespace=*/false, |
a723baf1 MM |
7685 | check_dependency_p); |
7686 | decl = maybe_get_template_decl_from_type_decl (decl); | |
7687 | ||
7688 | /* If DECL is a template, then the name was a template-name. */ | |
7689 | if (TREE_CODE (decl) == TEMPLATE_DECL) | |
7690 | ; | |
7691 | else | |
7692 | { | |
7693 | /* The standard does not explicitly indicate whether a name that | |
7694 | names a set of overloaded declarations, some of which are | |
7695 | templates, is a template-name. However, such a name should | |
7696 | be a template-name; otherwise, there is no way to form a | |
7697 | template-id for the overloaded templates. */ | |
7698 | fns = BASELINK_P (decl) ? BASELINK_FUNCTIONS (decl) : decl; | |
7699 | if (TREE_CODE (fns) == OVERLOAD) | |
7700 | { | |
7701 | tree fn; | |
7702 | ||
7703 | for (fn = fns; fn; fn = OVL_NEXT (fn)) | |
7704 | if (TREE_CODE (OVL_CURRENT (fn)) == TEMPLATE_DECL) | |
7705 | break; | |
7706 | } | |
7707 | else | |
7708 | { | |
7709 | /* Otherwise, the name does not name a template. */ | |
7710 | cp_parser_error (parser, "expected template-name"); | |
7711 | return error_mark_node; | |
7712 | } | |
7713 | } | |
7714 | ||
7715 | /* If DECL is dependent, and refers to a function, then just return | |
7716 | its name; we will look it up again during template instantiation. */ | |
7717 | if (DECL_FUNCTION_TEMPLATE_P (decl) || !DECL_P (decl)) | |
7718 | { | |
7719 | tree scope = CP_DECL_CONTEXT (get_first_fn (decl)); | |
1fb3244a | 7720 | if (TYPE_P (scope) && dependent_type_p (scope)) |
a723baf1 MM |
7721 | return identifier; |
7722 | } | |
7723 | ||
7724 | return decl; | |
7725 | } | |
7726 | ||
7727 | /* Parse a template-argument-list. | |
7728 | ||
7729 | template-argument-list: | |
7730 | template-argument | |
7731 | template-argument-list , template-argument | |
7732 | ||
bf12d54d | 7733 | Returns a TREE_VEC containing the arguments. */ |
a723baf1 MM |
7734 | |
7735 | static tree | |
94edc4ab | 7736 | cp_parser_template_argument_list (cp_parser* parser) |
a723baf1 | 7737 | { |
bf12d54d NS |
7738 | tree fixed_args[10]; |
7739 | unsigned n_args = 0; | |
7740 | unsigned alloced = 10; | |
7741 | tree *arg_ary = fixed_args; | |
7742 | tree vec; | |
a723baf1 | 7743 | |
bf12d54d | 7744 | do |
a723baf1 MM |
7745 | { |
7746 | tree argument; | |
7747 | ||
bf12d54d NS |
7748 | if (n_args) |
7749 | /* Consume the comma. */ | |
7750 | cp_lexer_consume_token (parser->lexer); | |
7751 | ||
a723baf1 MM |
7752 | /* Parse the template-argument. */ |
7753 | argument = cp_parser_template_argument (parser); | |
bf12d54d NS |
7754 | if (n_args == alloced) |
7755 | { | |
7756 | alloced *= 2; | |
7757 | ||
7758 | if (arg_ary == fixed_args) | |
7759 | { | |
7760 | arg_ary = xmalloc (sizeof (tree) * alloced); | |
7761 | memcpy (arg_ary, fixed_args, sizeof (tree) * n_args); | |
7762 | } | |
7763 | else | |
7764 | arg_ary = xrealloc (arg_ary, sizeof (tree) * alloced); | |
7765 | } | |
7766 | arg_ary[n_args++] = argument; | |
a723baf1 | 7767 | } |
bf12d54d NS |
7768 | while (cp_lexer_next_token_is (parser->lexer, CPP_COMMA)); |
7769 | ||
7770 | vec = make_tree_vec (n_args); | |
a723baf1 | 7771 | |
bf12d54d NS |
7772 | while (n_args--) |
7773 | TREE_VEC_ELT (vec, n_args) = arg_ary[n_args]; | |
7774 | ||
7775 | if (arg_ary != fixed_args) | |
7776 | free (arg_ary); | |
7777 | return vec; | |
a723baf1 MM |
7778 | } |
7779 | ||
7780 | /* Parse a template-argument. | |
7781 | ||
7782 | template-argument: | |
7783 | assignment-expression | |
7784 | type-id | |
7785 | id-expression | |
7786 | ||
7787 | The representation is that of an assignment-expression, type-id, or | |
7788 | id-expression -- except that the qualified id-expression is | |
7789 | evaluated, so that the value returned is either a DECL or an | |
d17811fd MM |
7790 | OVERLOAD. |
7791 | ||
7792 | Although the standard says "assignment-expression", it forbids | |
7793 | throw-expressions or assignments in the template argument. | |
7794 | Therefore, we use "conditional-expression" instead. */ | |
a723baf1 MM |
7795 | |
7796 | static tree | |
94edc4ab | 7797 | cp_parser_template_argument (cp_parser* parser) |
a723baf1 MM |
7798 | { |
7799 | tree argument; | |
7800 | bool template_p; | |
d17811fd MM |
7801 | bool address_p; |
7802 | cp_token *token; | |
b3445994 | 7803 | cp_id_kind idk; |
d17811fd | 7804 | tree qualifying_class; |
a723baf1 MM |
7805 | |
7806 | /* There's really no way to know what we're looking at, so we just | |
7807 | try each alternative in order. | |
7808 | ||
7809 | [temp.arg] | |
7810 | ||
7811 | In a template-argument, an ambiguity between a type-id and an | |
7812 | expression is resolved to a type-id, regardless of the form of | |
7813 | the corresponding template-parameter. | |
7814 | ||
7815 | Therefore, we try a type-id first. */ | |
7816 | cp_parser_parse_tentatively (parser); | |
a723baf1 MM |
7817 | argument = cp_parser_type_id (parser); |
7818 | /* If the next token isn't a `,' or a `>', then this argument wasn't | |
7819 | really finished. */ | |
d17811fd | 7820 | if (!cp_parser_next_token_ends_template_argument_p (parser)) |
a723baf1 MM |
7821 | cp_parser_error (parser, "expected template-argument"); |
7822 | /* If that worked, we're done. */ | |
7823 | if (cp_parser_parse_definitely (parser)) | |
7824 | return argument; | |
7825 | /* We're still not sure what the argument will be. */ | |
7826 | cp_parser_parse_tentatively (parser); | |
7827 | /* Try a template. */ | |
7828 | argument = cp_parser_id_expression (parser, | |
7829 | /*template_keyword_p=*/false, | |
7830 | /*check_dependency_p=*/true, | |
f3c2dfc6 MM |
7831 | &template_p, |
7832 | /*declarator_p=*/false); | |
a723baf1 MM |
7833 | /* If the next token isn't a `,' or a `>', then this argument wasn't |
7834 | really finished. */ | |
d17811fd | 7835 | if (!cp_parser_next_token_ends_template_argument_p (parser)) |
a723baf1 MM |
7836 | cp_parser_error (parser, "expected template-argument"); |
7837 | if (!cp_parser_error_occurred (parser)) | |
7838 | { | |
7839 | /* Figure out what is being referred to. */ | |
7840 | argument = cp_parser_lookup_name_simple (parser, argument); | |
7841 | if (template_p) | |
7842 | argument = make_unbound_class_template (TREE_OPERAND (argument, 0), | |
7843 | TREE_OPERAND (argument, 1), | |
78757caa | 7844 | tf_error); |
a723baf1 MM |
7845 | else if (TREE_CODE (argument) != TEMPLATE_DECL) |
7846 | cp_parser_error (parser, "expected template-name"); | |
7847 | } | |
7848 | if (cp_parser_parse_definitely (parser)) | |
7849 | return argument; | |
d17811fd MM |
7850 | /* It must be a non-type argument. There permitted cases are given |
7851 | in [temp.arg.nontype]: | |
7852 | ||
7853 | -- an integral constant-expression of integral or enumeration | |
7854 | type; or | |
7855 | ||
7856 | -- the name of a non-type template-parameter; or | |
7857 | ||
7858 | -- the name of an object or function with external linkage... | |
7859 | ||
7860 | -- the address of an object or function with external linkage... | |
7861 | ||
7862 | -- a pointer to member... */ | |
7863 | /* Look for a non-type template parameter. */ | |
7864 | if (cp_lexer_next_token_is (parser->lexer, CPP_NAME)) | |
7865 | { | |
7866 | cp_parser_parse_tentatively (parser); | |
7867 | argument = cp_parser_primary_expression (parser, | |
7868 | &idk, | |
7869 | &qualifying_class); | |
7870 | if (TREE_CODE (argument) != TEMPLATE_PARM_INDEX | |
7871 | || !cp_parser_next_token_ends_template_argument_p (parser)) | |
7872 | cp_parser_simulate_error (parser); | |
7873 | if (cp_parser_parse_definitely (parser)) | |
7874 | return argument; | |
7875 | } | |
7876 | /* If the next token is "&", the argument must be the address of an | |
7877 | object or function with external linkage. */ | |
7878 | address_p = cp_lexer_next_token_is (parser->lexer, CPP_AND); | |
7879 | if (address_p) | |
7880 | cp_lexer_consume_token (parser->lexer); | |
7881 | /* See if we might have an id-expression. */ | |
7882 | token = cp_lexer_peek_token (parser->lexer); | |
7883 | if (token->type == CPP_NAME | |
7884 | || token->keyword == RID_OPERATOR | |
7885 | || token->type == CPP_SCOPE | |
7886 | || token->type == CPP_TEMPLATE_ID | |
7887 | || token->type == CPP_NESTED_NAME_SPECIFIER) | |
7888 | { | |
7889 | cp_parser_parse_tentatively (parser); | |
7890 | argument = cp_parser_primary_expression (parser, | |
7891 | &idk, | |
7892 | &qualifying_class); | |
7893 | if (cp_parser_error_occurred (parser) | |
7894 | || !cp_parser_next_token_ends_template_argument_p (parser)) | |
7895 | cp_parser_abort_tentative_parse (parser); | |
7896 | else | |
7897 | { | |
7898 | if (qualifying_class) | |
7899 | argument = finish_qualified_id_expr (qualifying_class, | |
7900 | argument, | |
7901 | /*done=*/true, | |
7902 | address_p); | |
7903 | if (TREE_CODE (argument) == VAR_DECL) | |
7904 | { | |
7905 | /* A variable without external linkage might still be a | |
7906 | valid constant-expression, so no error is issued here | |
7907 | if the external-linkage check fails. */ | |
7908 | if (!DECL_EXTERNAL_LINKAGE_P (argument)) | |
7909 | cp_parser_simulate_error (parser); | |
7910 | } | |
7911 | else if (is_overloaded_fn (argument)) | |
7912 | /* All overloaded functions are allowed; if the external | |
7913 | linkage test does not pass, an error will be issued | |
7914 | later. */ | |
7915 | ; | |
7916 | else if (address_p | |
7917 | && (TREE_CODE (argument) == OFFSET_REF | |
7918 | || TREE_CODE (argument) == SCOPE_REF)) | |
7919 | /* A pointer-to-member. */ | |
7920 | ; | |
7921 | else | |
7922 | cp_parser_simulate_error (parser); | |
7923 | ||
7924 | if (cp_parser_parse_definitely (parser)) | |
7925 | { | |
7926 | if (address_p) | |
7927 | argument = build_x_unary_op (ADDR_EXPR, argument); | |
7928 | return argument; | |
7929 | } | |
7930 | } | |
7931 | } | |
7932 | /* If the argument started with "&", there are no other valid | |
7933 | alternatives at this point. */ | |
7934 | if (address_p) | |
7935 | { | |
7936 | cp_parser_error (parser, "invalid non-type template argument"); | |
7937 | return error_mark_node; | |
7938 | } | |
7939 | /* The argument must be a constant-expression. */ | |
7940 | argument = cp_parser_constant_expression (parser, | |
7941 | /*allow_non_constant_p=*/false, | |
7942 | /*non_constant_p=*/NULL); | |
7943 | /* If it's non-dependent, simplify it. */ | |
7944 | return cp_parser_fold_non_dependent_expr (argument); | |
a723baf1 MM |
7945 | } |
7946 | ||
7947 | /* Parse an explicit-instantiation. | |
7948 | ||
7949 | explicit-instantiation: | |
7950 | template declaration | |
7951 | ||
7952 | Although the standard says `declaration', what it really means is: | |
7953 | ||
7954 | explicit-instantiation: | |
7955 | template decl-specifier-seq [opt] declarator [opt] ; | |
7956 | ||
7957 | Things like `template int S<int>::i = 5, int S<double>::j;' are not | |
7958 | supposed to be allowed. A defect report has been filed about this | |
7959 | issue. | |
7960 | ||
7961 | GNU Extension: | |
7962 | ||
7963 | explicit-instantiation: | |
7964 | storage-class-specifier template | |
7965 | decl-specifier-seq [opt] declarator [opt] ; | |
7966 | function-specifier template | |
7967 | decl-specifier-seq [opt] declarator [opt] ; */ | |
7968 | ||
7969 | static void | |
94edc4ab | 7970 | cp_parser_explicit_instantiation (cp_parser* parser) |
a723baf1 | 7971 | { |
560ad596 | 7972 | int declares_class_or_enum; |
a723baf1 MM |
7973 | tree decl_specifiers; |
7974 | tree attributes; | |
7975 | tree extension_specifier = NULL_TREE; | |
7976 | ||
7977 | /* Look for an (optional) storage-class-specifier or | |
7978 | function-specifier. */ | |
7979 | if (cp_parser_allow_gnu_extensions_p (parser)) | |
7980 | { | |
7981 | extension_specifier | |
7982 | = cp_parser_storage_class_specifier_opt (parser); | |
7983 | if (!extension_specifier) | |
7984 | extension_specifier = cp_parser_function_specifier_opt (parser); | |
7985 | } | |
7986 | ||
7987 | /* Look for the `template' keyword. */ | |
7988 | cp_parser_require_keyword (parser, RID_TEMPLATE, "`template'"); | |
7989 | /* Let the front end know that we are processing an explicit | |
7990 | instantiation. */ | |
7991 | begin_explicit_instantiation (); | |
7992 | /* [temp.explicit] says that we are supposed to ignore access | |
7993 | control while processing explicit instantiation directives. */ | |
78757caa | 7994 | push_deferring_access_checks (dk_no_check); |
a723baf1 MM |
7995 | /* Parse a decl-specifier-seq. */ |
7996 | decl_specifiers | |
7997 | = cp_parser_decl_specifier_seq (parser, | |
7998 | CP_PARSER_FLAGS_OPTIONAL, | |
7999 | &attributes, | |
8000 | &declares_class_or_enum); | |
8001 | /* If there was exactly one decl-specifier, and it declared a class, | |
8002 | and there's no declarator, then we have an explicit type | |
8003 | instantiation. */ | |
8004 | if (declares_class_or_enum && cp_parser_declares_only_class_p (parser)) | |
8005 | { | |
8006 | tree type; | |
8007 | ||
8008 | type = check_tag_decl (decl_specifiers); | |
b7fc8b57 KL |
8009 | /* Turn access control back on for names used during |
8010 | template instantiation. */ | |
8011 | pop_deferring_access_checks (); | |
a723baf1 MM |
8012 | if (type) |
8013 | do_type_instantiation (type, extension_specifier, /*complain=*/1); | |
8014 | } | |
8015 | else | |
8016 | { | |
8017 | tree declarator; | |
8018 | tree decl; | |
8019 | ||
8020 | /* Parse the declarator. */ | |
8021 | declarator | |
62b8a44e | 8022 | = cp_parser_declarator (parser, CP_PARSER_DECLARATOR_NAMED, |
a723baf1 | 8023 | /*ctor_dtor_or_conv_p=*/NULL); |
560ad596 MM |
8024 | cp_parser_check_for_definition_in_return_type (declarator, |
8025 | declares_class_or_enum); | |
a723baf1 MM |
8026 | decl = grokdeclarator (declarator, decl_specifiers, |
8027 | NORMAL, 0, NULL); | |
b7fc8b57 KL |
8028 | /* Turn access control back on for names used during |
8029 | template instantiation. */ | |
8030 | pop_deferring_access_checks (); | |
a723baf1 MM |
8031 | /* Do the explicit instantiation. */ |
8032 | do_decl_instantiation (decl, extension_specifier); | |
8033 | } | |
8034 | /* We're done with the instantiation. */ | |
8035 | end_explicit_instantiation (); | |
a723baf1 | 8036 | |
e0860732 | 8037 | cp_parser_consume_semicolon_at_end_of_statement (parser); |
a723baf1 MM |
8038 | } |
8039 | ||
8040 | /* Parse an explicit-specialization. | |
8041 | ||
8042 | explicit-specialization: | |
8043 | template < > declaration | |
8044 | ||
8045 | Although the standard says `declaration', what it really means is: | |
8046 | ||
8047 | explicit-specialization: | |
8048 | template <> decl-specifier [opt] init-declarator [opt] ; | |
8049 | template <> function-definition | |
8050 | template <> explicit-specialization | |
8051 | template <> template-declaration */ | |
8052 | ||
8053 | static void | |
94edc4ab | 8054 | cp_parser_explicit_specialization (cp_parser* parser) |
a723baf1 MM |
8055 | { |
8056 | /* Look for the `template' keyword. */ | |
8057 | cp_parser_require_keyword (parser, RID_TEMPLATE, "`template'"); | |
8058 | /* Look for the `<'. */ | |
8059 | cp_parser_require (parser, CPP_LESS, "`<'"); | |
8060 | /* Look for the `>'. */ | |
8061 | cp_parser_require (parser, CPP_GREATER, "`>'"); | |
8062 | /* We have processed another parameter list. */ | |
8063 | ++parser->num_template_parameter_lists; | |
8064 | /* Let the front end know that we are beginning a specialization. */ | |
8065 | begin_specialization (); | |
8066 | ||
8067 | /* If the next keyword is `template', we need to figure out whether | |
8068 | or not we're looking a template-declaration. */ | |
8069 | if (cp_lexer_next_token_is_keyword (parser->lexer, RID_TEMPLATE)) | |
8070 | { | |
8071 | if (cp_lexer_peek_nth_token (parser->lexer, 2)->type == CPP_LESS | |
8072 | && cp_lexer_peek_nth_token (parser->lexer, 3)->type != CPP_GREATER) | |
8073 | cp_parser_template_declaration_after_export (parser, | |
8074 | /*member_p=*/false); | |
8075 | else | |
8076 | cp_parser_explicit_specialization (parser); | |
8077 | } | |
8078 | else | |
8079 | /* Parse the dependent declaration. */ | |
8080 | cp_parser_single_declaration (parser, | |
8081 | /*member_p=*/false, | |
8082 | /*friend_p=*/NULL); | |
8083 | ||
8084 | /* We're done with the specialization. */ | |
8085 | end_specialization (); | |
8086 | /* We're done with this parameter list. */ | |
8087 | --parser->num_template_parameter_lists; | |
8088 | } | |
8089 | ||
8090 | /* Parse a type-specifier. | |
8091 | ||
8092 | type-specifier: | |
8093 | simple-type-specifier | |
8094 | class-specifier | |
8095 | enum-specifier | |
8096 | elaborated-type-specifier | |
8097 | cv-qualifier | |
8098 | ||
8099 | GNU Extension: | |
8100 | ||
8101 | type-specifier: | |
8102 | __complex__ | |
8103 | ||
8104 | Returns a representation of the type-specifier. If the | |
8105 | type-specifier is a keyword (like `int' or `const', or | |
34cd5ae7 | 8106 | `__complex__') then the corresponding IDENTIFIER_NODE is returned. |
a723baf1 MM |
8107 | For a class-specifier, enum-specifier, or elaborated-type-specifier |
8108 | a TREE_TYPE is returned; otherwise, a TYPE_DECL is returned. | |
8109 | ||
8110 | If IS_FRIEND is TRUE then this type-specifier is being declared a | |
8111 | `friend'. If IS_DECLARATION is TRUE, then this type-specifier is | |
8112 | appearing in a decl-specifier-seq. | |
8113 | ||
8114 | If DECLARES_CLASS_OR_ENUM is non-NULL, and the type-specifier is a | |
8115 | class-specifier, enum-specifier, or elaborated-type-specifier, then | |
560ad596 MM |
8116 | *DECLARES_CLASS_OR_ENUM is set to a non-zero value. The value is 1 |
8117 | if a type is declared; 2 if it is defined. Otherwise, it is set to | |
8118 | zero. | |
a723baf1 MM |
8119 | |
8120 | If IS_CV_QUALIFIER is non-NULL, and the type-specifier is a | |
8121 | cv-qualifier, then IS_CV_QUALIFIER is set to TRUE. Otherwise, it | |
8122 | is set to FALSE. */ | |
8123 | ||
8124 | static tree | |
94edc4ab NN |
8125 | cp_parser_type_specifier (cp_parser* parser, |
8126 | cp_parser_flags flags, | |
8127 | bool is_friend, | |
8128 | bool is_declaration, | |
560ad596 | 8129 | int* declares_class_or_enum, |
94edc4ab | 8130 | bool* is_cv_qualifier) |
a723baf1 MM |
8131 | { |
8132 | tree type_spec = NULL_TREE; | |
8133 | cp_token *token; | |
8134 | enum rid keyword; | |
8135 | ||
8136 | /* Assume this type-specifier does not declare a new type. */ | |
8137 | if (declares_class_or_enum) | |
8138 | *declares_class_or_enum = false; | |
8139 | /* And that it does not specify a cv-qualifier. */ | |
8140 | if (is_cv_qualifier) | |
8141 | *is_cv_qualifier = false; | |
8142 | /* Peek at the next token. */ | |
8143 | token = cp_lexer_peek_token (parser->lexer); | |
8144 | ||
8145 | /* If we're looking at a keyword, we can use that to guide the | |
8146 | production we choose. */ | |
8147 | keyword = token->keyword; | |
8148 | switch (keyword) | |
8149 | { | |
8150 | /* Any of these indicate either a class-specifier, or an | |
8151 | elaborated-type-specifier. */ | |
8152 | case RID_CLASS: | |
8153 | case RID_STRUCT: | |
8154 | case RID_UNION: | |
8155 | case RID_ENUM: | |
8156 | /* Parse tentatively so that we can back up if we don't find a | |
8157 | class-specifier or enum-specifier. */ | |
8158 | cp_parser_parse_tentatively (parser); | |
8159 | /* Look for the class-specifier or enum-specifier. */ | |
8160 | if (keyword == RID_ENUM) | |
8161 | type_spec = cp_parser_enum_specifier (parser); | |
8162 | else | |
8163 | type_spec = cp_parser_class_specifier (parser); | |
8164 | ||
8165 | /* If that worked, we're done. */ | |
8166 | if (cp_parser_parse_definitely (parser)) | |
8167 | { | |
8168 | if (declares_class_or_enum) | |
560ad596 | 8169 | *declares_class_or_enum = 2; |
a723baf1 MM |
8170 | return type_spec; |
8171 | } | |
8172 | ||
8173 | /* Fall through. */ | |
8174 | ||
8175 | case RID_TYPENAME: | |
8176 | /* Look for an elaborated-type-specifier. */ | |
8177 | type_spec = cp_parser_elaborated_type_specifier (parser, | |
8178 | is_friend, | |
8179 | is_declaration); | |
8180 | /* We're declaring a class or enum -- unless we're using | |
8181 | `typename'. */ | |
8182 | if (declares_class_or_enum && keyword != RID_TYPENAME) | |
560ad596 | 8183 | *declares_class_or_enum = 1; |
a723baf1 MM |
8184 | return type_spec; |
8185 | ||
8186 | case RID_CONST: | |
8187 | case RID_VOLATILE: | |
8188 | case RID_RESTRICT: | |
8189 | type_spec = cp_parser_cv_qualifier_opt (parser); | |
8190 | /* Even though we call a routine that looks for an optional | |
8191 | qualifier, we know that there should be one. */ | |
8192 | my_friendly_assert (type_spec != NULL, 20000328); | |
8193 | /* This type-specifier was a cv-qualified. */ | |
8194 | if (is_cv_qualifier) | |
8195 | *is_cv_qualifier = true; | |
8196 | ||
8197 | return type_spec; | |
8198 | ||
8199 | case RID_COMPLEX: | |
8200 | /* The `__complex__' keyword is a GNU extension. */ | |
8201 | return cp_lexer_consume_token (parser->lexer)->value; | |
8202 | ||
8203 | default: | |
8204 | break; | |
8205 | } | |
8206 | ||
8207 | /* If we do not already have a type-specifier, assume we are looking | |
8208 | at a simple-type-specifier. */ | |
4b0d3cbe MM |
8209 | type_spec = cp_parser_simple_type_specifier (parser, flags, |
8210 | /*identifier_p=*/true); | |
a723baf1 MM |
8211 | |
8212 | /* If we didn't find a type-specifier, and a type-specifier was not | |
8213 | optional in this context, issue an error message. */ | |
8214 | if (!type_spec && !(flags & CP_PARSER_FLAGS_OPTIONAL)) | |
8215 | { | |
8216 | cp_parser_error (parser, "expected type specifier"); | |
8217 | return error_mark_node; | |
8218 | } | |
8219 | ||
8220 | return type_spec; | |
8221 | } | |
8222 | ||
8223 | /* Parse a simple-type-specifier. | |
8224 | ||
8225 | simple-type-specifier: | |
8226 | :: [opt] nested-name-specifier [opt] type-name | |
8227 | :: [opt] nested-name-specifier template template-id | |
8228 | char | |
8229 | wchar_t | |
8230 | bool | |
8231 | short | |
8232 | int | |
8233 | long | |
8234 | signed | |
8235 | unsigned | |
8236 | float | |
8237 | double | |
8238 | void | |
8239 | ||
8240 | GNU Extension: | |
8241 | ||
8242 | simple-type-specifier: | |
8243 | __typeof__ unary-expression | |
8244 | __typeof__ ( type-id ) | |
8245 | ||
8246 | For the various keywords, the value returned is simply the | |
4b0d3cbe MM |
8247 | TREE_IDENTIFIER representing the keyword if IDENTIFIER_P is true. |
8248 | For the first two productions, and if IDENTIFIER_P is false, the | |
8249 | value returned is the indicated TYPE_DECL. */ | |
a723baf1 MM |
8250 | |
8251 | static tree | |
4b0d3cbe MM |
8252 | cp_parser_simple_type_specifier (cp_parser* parser, cp_parser_flags flags, |
8253 | bool identifier_p) | |
a723baf1 MM |
8254 | { |
8255 | tree type = NULL_TREE; | |
8256 | cp_token *token; | |
8257 | ||
8258 | /* Peek at the next token. */ | |
8259 | token = cp_lexer_peek_token (parser->lexer); | |
8260 | ||
8261 | /* If we're looking at a keyword, things are easy. */ | |
8262 | switch (token->keyword) | |
8263 | { | |
8264 | case RID_CHAR: | |
4b0d3cbe MM |
8265 | type = char_type_node; |
8266 | break; | |
a723baf1 | 8267 | case RID_WCHAR: |
4b0d3cbe MM |
8268 | type = wchar_type_node; |
8269 | break; | |
a723baf1 | 8270 | case RID_BOOL: |
4b0d3cbe MM |
8271 | type = boolean_type_node; |
8272 | break; | |
a723baf1 | 8273 | case RID_SHORT: |
4b0d3cbe MM |
8274 | type = short_integer_type_node; |
8275 | break; | |
a723baf1 | 8276 | case RID_INT: |
4b0d3cbe MM |
8277 | type = integer_type_node; |
8278 | break; | |
a723baf1 | 8279 | case RID_LONG: |
4b0d3cbe MM |
8280 | type = long_integer_type_node; |
8281 | break; | |
a723baf1 | 8282 | case RID_SIGNED: |
4b0d3cbe MM |
8283 | type = integer_type_node; |
8284 | break; | |
a723baf1 | 8285 | case RID_UNSIGNED: |
4b0d3cbe MM |
8286 | type = unsigned_type_node; |
8287 | break; | |
a723baf1 | 8288 | case RID_FLOAT: |
4b0d3cbe MM |
8289 | type = float_type_node; |
8290 | break; | |
a723baf1 | 8291 | case RID_DOUBLE: |
4b0d3cbe MM |
8292 | type = double_type_node; |
8293 | break; | |
a723baf1 | 8294 | case RID_VOID: |
4b0d3cbe MM |
8295 | type = void_type_node; |
8296 | break; | |
a723baf1 MM |
8297 | |
8298 | case RID_TYPEOF: | |
8299 | { | |
8300 | tree operand; | |
8301 | ||
8302 | /* Consume the `typeof' token. */ | |
8303 | cp_lexer_consume_token (parser->lexer); | |
8304 | /* Parse the operand to `typeof' */ | |
8305 | operand = cp_parser_sizeof_operand (parser, RID_TYPEOF); | |
8306 | /* If it is not already a TYPE, take its type. */ | |
8307 | if (!TYPE_P (operand)) | |
8308 | operand = finish_typeof (operand); | |
8309 | ||
8310 | return operand; | |
8311 | } | |
8312 | ||
8313 | default: | |
8314 | break; | |
8315 | } | |
8316 | ||
4b0d3cbe MM |
8317 | /* If the type-specifier was for a built-in type, we're done. */ |
8318 | if (type) | |
8319 | { | |
8320 | tree id; | |
8321 | ||
8322 | /* Consume the token. */ | |
8323 | id = cp_lexer_consume_token (parser->lexer)->value; | |
8324 | return identifier_p ? id : TYPE_NAME (type); | |
8325 | } | |
8326 | ||
a723baf1 MM |
8327 | /* The type-specifier must be a user-defined type. */ |
8328 | if (!(flags & CP_PARSER_FLAGS_NO_USER_DEFINED_TYPES)) | |
8329 | { | |
8330 | /* Don't gobble tokens or issue error messages if this is an | |
8331 | optional type-specifier. */ | |
8332 | if (flags & CP_PARSER_FLAGS_OPTIONAL) | |
8333 | cp_parser_parse_tentatively (parser); | |
8334 | ||
8335 | /* Look for the optional `::' operator. */ | |
8336 | cp_parser_global_scope_opt (parser, | |
8337 | /*current_scope_valid_p=*/false); | |
8338 | /* Look for the nested-name specifier. */ | |
8339 | cp_parser_nested_name_specifier_opt (parser, | |
8340 | /*typename_keyword_p=*/false, | |
8341 | /*check_dependency_p=*/true, | |
8342 | /*type_p=*/false); | |
8343 | /* If we have seen a nested-name-specifier, and the next token | |
8344 | is `template', then we are using the template-id production. */ | |
8345 | if (parser->scope | |
8346 | && cp_parser_optional_template_keyword (parser)) | |
8347 | { | |
8348 | /* Look for the template-id. */ | |
8349 | type = cp_parser_template_id (parser, | |
8350 | /*template_keyword_p=*/true, | |
8351 | /*check_dependency_p=*/true); | |
8352 | /* If the template-id did not name a type, we are out of | |
8353 | luck. */ | |
8354 | if (TREE_CODE (type) != TYPE_DECL) | |
8355 | { | |
8356 | cp_parser_error (parser, "expected template-id for type"); | |
8357 | type = NULL_TREE; | |
8358 | } | |
8359 | } | |
8360 | /* Otherwise, look for a type-name. */ | |
8361 | else | |
8362 | { | |
8363 | type = cp_parser_type_name (parser); | |
8364 | if (type == error_mark_node) | |
8365 | type = NULL_TREE; | |
8366 | } | |
8367 | ||
8368 | /* If it didn't work out, we don't have a TYPE. */ | |
8369 | if ((flags & CP_PARSER_FLAGS_OPTIONAL) | |
8370 | && !cp_parser_parse_definitely (parser)) | |
8371 | type = NULL_TREE; | |
8372 | } | |
8373 | ||
8374 | /* If we didn't get a type-name, issue an error message. */ | |
8375 | if (!type && !(flags & CP_PARSER_FLAGS_OPTIONAL)) | |
8376 | { | |
8377 | cp_parser_error (parser, "expected type-name"); | |
8378 | return error_mark_node; | |
8379 | } | |
8380 | ||
8381 | return type; | |
8382 | } | |
8383 | ||
8384 | /* Parse a type-name. | |
8385 | ||
8386 | type-name: | |
8387 | class-name | |
8388 | enum-name | |
8389 | typedef-name | |
8390 | ||
8391 | enum-name: | |
8392 | identifier | |
8393 | ||
8394 | typedef-name: | |
8395 | identifier | |
8396 | ||
8397 | Returns a TYPE_DECL for the the type. */ | |
8398 | ||
8399 | static tree | |
94edc4ab | 8400 | cp_parser_type_name (cp_parser* parser) |
a723baf1 MM |
8401 | { |
8402 | tree type_decl; | |
8403 | tree identifier; | |
8404 | ||
8405 | /* We can't know yet whether it is a class-name or not. */ | |
8406 | cp_parser_parse_tentatively (parser); | |
8407 | /* Try a class-name. */ | |
8408 | type_decl = cp_parser_class_name (parser, | |
8409 | /*typename_keyword_p=*/false, | |
8410 | /*template_keyword_p=*/false, | |
8411 | /*type_p=*/false, | |
a723baf1 MM |
8412 | /*check_dependency_p=*/true, |
8413 | /*class_head_p=*/false); | |
8414 | /* If it's not a class-name, keep looking. */ | |
8415 | if (!cp_parser_parse_definitely (parser)) | |
8416 | { | |
8417 | /* It must be a typedef-name or an enum-name. */ | |
8418 | identifier = cp_parser_identifier (parser); | |
8419 | if (identifier == error_mark_node) | |
8420 | return error_mark_node; | |
8421 | ||
8422 | /* Look up the type-name. */ | |
8423 | type_decl = cp_parser_lookup_name_simple (parser, identifier); | |
8424 | /* Issue an error if we did not find a type-name. */ | |
8425 | if (TREE_CODE (type_decl) != TYPE_DECL) | |
8426 | { | |
8427 | cp_parser_error (parser, "expected type-name"); | |
8428 | type_decl = error_mark_node; | |
8429 | } | |
8430 | /* Remember that the name was used in the definition of the | |
8431 | current class so that we can check later to see if the | |
8432 | meaning would have been different after the class was | |
8433 | entirely defined. */ | |
8434 | else if (type_decl != error_mark_node | |
8435 | && !parser->scope) | |
8436 | maybe_note_name_used_in_class (identifier, type_decl); | |
8437 | } | |
8438 | ||
8439 | return type_decl; | |
8440 | } | |
8441 | ||
8442 | ||
8443 | /* Parse an elaborated-type-specifier. Note that the grammar given | |
8444 | here incorporates the resolution to DR68. | |
8445 | ||
8446 | elaborated-type-specifier: | |
8447 | class-key :: [opt] nested-name-specifier [opt] identifier | |
8448 | class-key :: [opt] nested-name-specifier [opt] template [opt] template-id | |
8449 | enum :: [opt] nested-name-specifier [opt] identifier | |
8450 | typename :: [opt] nested-name-specifier identifier | |
8451 | typename :: [opt] nested-name-specifier template [opt] | |
8452 | template-id | |
8453 | ||
8454 | If IS_FRIEND is TRUE, then this elaborated-type-specifier is being | |
8455 | declared `friend'. If IS_DECLARATION is TRUE, then this | |
8456 | elaborated-type-specifier appears in a decl-specifiers-seq, i.e., | |
8457 | something is being declared. | |
8458 | ||
8459 | Returns the TYPE specified. */ | |
8460 | ||
8461 | static tree | |
94edc4ab NN |
8462 | cp_parser_elaborated_type_specifier (cp_parser* parser, |
8463 | bool is_friend, | |
8464 | bool is_declaration) | |
a723baf1 MM |
8465 | { |
8466 | enum tag_types tag_type; | |
8467 | tree identifier; | |
8468 | tree type = NULL_TREE; | |
8469 | ||
8470 | /* See if we're looking at the `enum' keyword. */ | |
8471 | if (cp_lexer_next_token_is_keyword (parser->lexer, RID_ENUM)) | |
8472 | { | |
8473 | /* Consume the `enum' token. */ | |
8474 | cp_lexer_consume_token (parser->lexer); | |
8475 | /* Remember that it's an enumeration type. */ | |
8476 | tag_type = enum_type; | |
8477 | } | |
8478 | /* Or, it might be `typename'. */ | |
8479 | else if (cp_lexer_next_token_is_keyword (parser->lexer, | |
8480 | RID_TYPENAME)) | |
8481 | { | |
8482 | /* Consume the `typename' token. */ | |
8483 | cp_lexer_consume_token (parser->lexer); | |
8484 | /* Remember that it's a `typename' type. */ | |
8485 | tag_type = typename_type; | |
8486 | /* The `typename' keyword is only allowed in templates. */ | |
8487 | if (!processing_template_decl) | |
8488 | pedwarn ("using `typename' outside of template"); | |
8489 | } | |
8490 | /* Otherwise it must be a class-key. */ | |
8491 | else | |
8492 | { | |
8493 | tag_type = cp_parser_class_key (parser); | |
8494 | if (tag_type == none_type) | |
8495 | return error_mark_node; | |
8496 | } | |
8497 | ||
8498 | /* Look for the `::' operator. */ | |
8499 | cp_parser_global_scope_opt (parser, | |
8500 | /*current_scope_valid_p=*/false); | |
8501 | /* Look for the nested-name-specifier. */ | |
8502 | if (tag_type == typename_type) | |
8fa1ad0e MM |
8503 | { |
8504 | if (cp_parser_nested_name_specifier (parser, | |
8505 | /*typename_keyword_p=*/true, | |
8506 | /*check_dependency_p=*/true, | |
8507 | /*type_p=*/true) | |
8508 | == error_mark_node) | |
8509 | return error_mark_node; | |
8510 | } | |
a723baf1 MM |
8511 | else |
8512 | /* Even though `typename' is not present, the proposed resolution | |
8513 | to Core Issue 180 says that in `class A<T>::B', `B' should be | |
8514 | considered a type-name, even if `A<T>' is dependent. */ | |
8515 | cp_parser_nested_name_specifier_opt (parser, | |
8516 | /*typename_keyword_p=*/true, | |
8517 | /*check_dependency_p=*/true, | |
8518 | /*type_p=*/true); | |
8519 | /* For everything but enumeration types, consider a template-id. */ | |
8520 | if (tag_type != enum_type) | |
8521 | { | |
8522 | bool template_p = false; | |
8523 | tree decl; | |
8524 | ||
8525 | /* Allow the `template' keyword. */ | |
8526 | template_p = cp_parser_optional_template_keyword (parser); | |
8527 | /* If we didn't see `template', we don't know if there's a | |
8528 | template-id or not. */ | |
8529 | if (!template_p) | |
8530 | cp_parser_parse_tentatively (parser); | |
8531 | /* Parse the template-id. */ | |
8532 | decl = cp_parser_template_id (parser, template_p, | |
8533 | /*check_dependency_p=*/true); | |
8534 | /* If we didn't find a template-id, look for an ordinary | |
8535 | identifier. */ | |
8536 | if (!template_p && !cp_parser_parse_definitely (parser)) | |
8537 | ; | |
8538 | /* If DECL is a TEMPLATE_ID_EXPR, and the `typename' keyword is | |
8539 | in effect, then we must assume that, upon instantiation, the | |
8540 | template will correspond to a class. */ | |
8541 | else if (TREE_CODE (decl) == TEMPLATE_ID_EXPR | |
8542 | && tag_type == typename_type) | |
8543 | type = make_typename_type (parser->scope, decl, | |
8544 | /*complain=*/1); | |
8545 | else | |
8546 | type = TREE_TYPE (decl); | |
8547 | } | |
8548 | ||
8549 | /* For an enumeration type, consider only a plain identifier. */ | |
8550 | if (!type) | |
8551 | { | |
8552 | identifier = cp_parser_identifier (parser); | |
8553 | ||
8554 | if (identifier == error_mark_node) | |
eb5abb39 NS |
8555 | { |
8556 | parser->scope = NULL_TREE; | |
8557 | return error_mark_node; | |
8558 | } | |
a723baf1 MM |
8559 | |
8560 | /* For a `typename', we needn't call xref_tag. */ | |
8561 | if (tag_type == typename_type) | |
8562 | return make_typename_type (parser->scope, identifier, | |
8563 | /*complain=*/1); | |
8564 | /* Look up a qualified name in the usual way. */ | |
8565 | if (parser->scope) | |
8566 | { | |
8567 | tree decl; | |
8568 | ||
8569 | /* In an elaborated-type-specifier, names are assumed to name | |
8570 | types, so we set IS_TYPE to TRUE when calling | |
8571 | cp_parser_lookup_name. */ | |
8572 | decl = cp_parser_lookup_name (parser, identifier, | |
a723baf1 | 8573 | /*is_type=*/true, |
eea9800f | 8574 | /*is_namespace=*/false, |
a723baf1 | 8575 | /*check_dependency=*/true); |
710b73e6 KL |
8576 | |
8577 | /* If we are parsing friend declaration, DECL may be a | |
8578 | TEMPLATE_DECL tree node here. However, we need to check | |
8579 | whether this TEMPLATE_DECL results in valid code. Consider | |
8580 | the following example: | |
8581 | ||
8582 | namespace N { | |
8583 | template <class T> class C {}; | |
8584 | } | |
8585 | class X { | |
8586 | template <class T> friend class N::C; // #1, valid code | |
8587 | }; | |
8588 | template <class T> class Y { | |
8589 | friend class N::C; // #2, invalid code | |
8590 | }; | |
8591 | ||
8592 | For both case #1 and #2, we arrive at a TEMPLATE_DECL after | |
8593 | name lookup of `N::C'. We see that friend declaration must | |
8594 | be template for the code to be valid. Note that | |
8595 | processing_template_decl does not work here since it is | |
8596 | always 1 for the above two cases. */ | |
8597 | ||
a723baf1 | 8598 | decl = (cp_parser_maybe_treat_template_as_class |
710b73e6 KL |
8599 | (decl, /*tag_name_p=*/is_friend |
8600 | && parser->num_template_parameter_lists)); | |
a723baf1 MM |
8601 | |
8602 | if (TREE_CODE (decl) != TYPE_DECL) | |
8603 | { | |
8604 | error ("expected type-name"); | |
8605 | return error_mark_node; | |
8606 | } | |
560ad596 MM |
8607 | |
8608 | if (TREE_CODE (TREE_TYPE (decl)) != TYPENAME_TYPE) | |
8609 | check_elaborated_type_specifier | |
4b0d3cbe | 8610 | (tag_type, decl, |
560ad596 MM |
8611 | (parser->num_template_parameter_lists |
8612 | || DECL_SELF_REFERENCE_P (decl))); | |
a723baf1 MM |
8613 | |
8614 | type = TREE_TYPE (decl); | |
8615 | } | |
8616 | else | |
8617 | { | |
8618 | /* An elaborated-type-specifier sometimes introduces a new type and | |
8619 | sometimes names an existing type. Normally, the rule is that it | |
8620 | introduces a new type only if there is not an existing type of | |
8621 | the same name already in scope. For example, given: | |
8622 | ||
8623 | struct S {}; | |
8624 | void f() { struct S s; } | |
8625 | ||
8626 | the `struct S' in the body of `f' is the same `struct S' as in | |
8627 | the global scope; the existing definition is used. However, if | |
8628 | there were no global declaration, this would introduce a new | |
8629 | local class named `S'. | |
8630 | ||
8631 | An exception to this rule applies to the following code: | |
8632 | ||
8633 | namespace N { struct S; } | |
8634 | ||
8635 | Here, the elaborated-type-specifier names a new type | |
8636 | unconditionally; even if there is already an `S' in the | |
8637 | containing scope this declaration names a new type. | |
8638 | This exception only applies if the elaborated-type-specifier | |
8639 | forms the complete declaration: | |
8640 | ||
8641 | [class.name] | |
8642 | ||
8643 | A declaration consisting solely of `class-key identifier ;' is | |
8644 | either a redeclaration of the name in the current scope or a | |
8645 | forward declaration of the identifier as a class name. It | |
8646 | introduces the name into the current scope. | |
8647 | ||
8648 | We are in this situation precisely when the next token is a `;'. | |
8649 | ||
8650 | An exception to the exception is that a `friend' declaration does | |
8651 | *not* name a new type; i.e., given: | |
8652 | ||
8653 | struct S { friend struct T; }; | |
8654 | ||
8655 | `T' is not a new type in the scope of `S'. | |
8656 | ||
8657 | Also, `new struct S' or `sizeof (struct S)' never results in the | |
8658 | definition of a new type; a new type can only be declared in a | |
9bcb9aae | 8659 | declaration context. */ |
a723baf1 MM |
8660 | |
8661 | type = xref_tag (tag_type, identifier, | |
8662 | /*attributes=*/NULL_TREE, | |
8663 | (is_friend | |
8664 | || !is_declaration | |
8665 | || cp_lexer_next_token_is_not (parser->lexer, | |
cbd63935 KL |
8666 | CPP_SEMICOLON)), |
8667 | parser->num_template_parameter_lists); | |
a723baf1 MM |
8668 | } |
8669 | } | |
8670 | if (tag_type != enum_type) | |
8671 | cp_parser_check_class_key (tag_type, type); | |
8672 | return type; | |
8673 | } | |
8674 | ||
8675 | /* Parse an enum-specifier. | |
8676 | ||
8677 | enum-specifier: | |
8678 | enum identifier [opt] { enumerator-list [opt] } | |
8679 | ||
8680 | Returns an ENUM_TYPE representing the enumeration. */ | |
8681 | ||
8682 | static tree | |
94edc4ab | 8683 | cp_parser_enum_specifier (cp_parser* parser) |
a723baf1 MM |
8684 | { |
8685 | cp_token *token; | |
8686 | tree identifier = NULL_TREE; | |
8687 | tree type; | |
8688 | ||
8689 | /* Look for the `enum' keyword. */ | |
8690 | if (!cp_parser_require_keyword (parser, RID_ENUM, "`enum'")) | |
8691 | return error_mark_node; | |
8692 | /* Peek at the next token. */ | |
8693 | token = cp_lexer_peek_token (parser->lexer); | |
8694 | ||
8695 | /* See if it is an identifier. */ | |
8696 | if (token->type == CPP_NAME) | |
8697 | identifier = cp_parser_identifier (parser); | |
8698 | ||
8699 | /* Look for the `{'. */ | |
8700 | if (!cp_parser_require (parser, CPP_OPEN_BRACE, "`{'")) | |
8701 | return error_mark_node; | |
8702 | ||
8703 | /* At this point, we're going ahead with the enum-specifier, even | |
8704 | if some other problem occurs. */ | |
8705 | cp_parser_commit_to_tentative_parse (parser); | |
8706 | ||
8707 | /* Issue an error message if type-definitions are forbidden here. */ | |
8708 | cp_parser_check_type_definition (parser); | |
8709 | ||
8710 | /* Create the new type. */ | |
8711 | type = start_enum (identifier ? identifier : make_anon_name ()); | |
8712 | ||
8713 | /* Peek at the next token. */ | |
8714 | token = cp_lexer_peek_token (parser->lexer); | |
8715 | /* If it's not a `}', then there are some enumerators. */ | |
8716 | if (token->type != CPP_CLOSE_BRACE) | |
8717 | cp_parser_enumerator_list (parser, type); | |
8718 | /* Look for the `}'. */ | |
8719 | cp_parser_require (parser, CPP_CLOSE_BRACE, "`}'"); | |
8720 | ||
8721 | /* Finish up the enumeration. */ | |
8722 | finish_enum (type); | |
8723 | ||
8724 | return type; | |
8725 | } | |
8726 | ||
8727 | /* Parse an enumerator-list. The enumerators all have the indicated | |
8728 | TYPE. | |
8729 | ||
8730 | enumerator-list: | |
8731 | enumerator-definition | |
8732 | enumerator-list , enumerator-definition */ | |
8733 | ||
8734 | static void | |
94edc4ab | 8735 | cp_parser_enumerator_list (cp_parser* parser, tree type) |
a723baf1 MM |
8736 | { |
8737 | while (true) | |
8738 | { | |
8739 | cp_token *token; | |
8740 | ||
8741 | /* Parse an enumerator-definition. */ | |
8742 | cp_parser_enumerator_definition (parser, type); | |
8743 | /* Peek at the next token. */ | |
8744 | token = cp_lexer_peek_token (parser->lexer); | |
8745 | /* If it's not a `,', then we've reached the end of the | |
8746 | list. */ | |
8747 | if (token->type != CPP_COMMA) | |
8748 | break; | |
8749 | /* Otherwise, consume the `,' and keep going. */ | |
8750 | cp_lexer_consume_token (parser->lexer); | |
8751 | /* If the next token is a `}', there is a trailing comma. */ | |
8752 | if (cp_lexer_next_token_is (parser->lexer, CPP_CLOSE_BRACE)) | |
8753 | { | |
8754 | if (pedantic && !in_system_header) | |
8755 | pedwarn ("comma at end of enumerator list"); | |
8756 | break; | |
8757 | } | |
8758 | } | |
8759 | } | |
8760 | ||
8761 | /* Parse an enumerator-definition. The enumerator has the indicated | |
8762 | TYPE. | |
8763 | ||
8764 | enumerator-definition: | |
8765 | enumerator | |
8766 | enumerator = constant-expression | |
8767 | ||
8768 | enumerator: | |
8769 | identifier */ | |
8770 | ||
8771 | static void | |
94edc4ab | 8772 | cp_parser_enumerator_definition (cp_parser* parser, tree type) |
a723baf1 MM |
8773 | { |
8774 | cp_token *token; | |
8775 | tree identifier; | |
8776 | tree value; | |
8777 | ||
8778 | /* Look for the identifier. */ | |
8779 | identifier = cp_parser_identifier (parser); | |
8780 | if (identifier == error_mark_node) | |
8781 | return; | |
8782 | ||
8783 | /* Peek at the next token. */ | |
8784 | token = cp_lexer_peek_token (parser->lexer); | |
8785 | /* If it's an `=', then there's an explicit value. */ | |
8786 | if (token->type == CPP_EQ) | |
8787 | { | |
8788 | /* Consume the `=' token. */ | |
8789 | cp_lexer_consume_token (parser->lexer); | |
8790 | /* Parse the value. */ | |
14d22dd6 | 8791 | value = cp_parser_constant_expression (parser, |
d17811fd | 8792 | /*allow_non_constant_p=*/false, |
14d22dd6 | 8793 | NULL); |
a723baf1 MM |
8794 | } |
8795 | else | |
8796 | value = NULL_TREE; | |
8797 | ||
8798 | /* Create the enumerator. */ | |
8799 | build_enumerator (identifier, value, type); | |
8800 | } | |
8801 | ||
8802 | /* Parse a namespace-name. | |
8803 | ||
8804 | namespace-name: | |
8805 | original-namespace-name | |
8806 | namespace-alias | |
8807 | ||
8808 | Returns the NAMESPACE_DECL for the namespace. */ | |
8809 | ||
8810 | static tree | |
94edc4ab | 8811 | cp_parser_namespace_name (cp_parser* parser) |
a723baf1 MM |
8812 | { |
8813 | tree identifier; | |
8814 | tree namespace_decl; | |
8815 | ||
8816 | /* Get the name of the namespace. */ | |
8817 | identifier = cp_parser_identifier (parser); | |
8818 | if (identifier == error_mark_node) | |
8819 | return error_mark_node; | |
8820 | ||
eea9800f MM |
8821 | /* Look up the identifier in the currently active scope. Look only |
8822 | for namespaces, due to: | |
8823 | ||
8824 | [basic.lookup.udir] | |
8825 | ||
8826 | When looking up a namespace-name in a using-directive or alias | |
8827 | definition, only namespace names are considered. | |
8828 | ||
8829 | And: | |
8830 | ||
8831 | [basic.lookup.qual] | |
8832 | ||
8833 | During the lookup of a name preceding the :: scope resolution | |
8834 | operator, object, function, and enumerator names are ignored. | |
8835 | ||
8836 | (Note that cp_parser_class_or_namespace_name only calls this | |
8837 | function if the token after the name is the scope resolution | |
8838 | operator.) */ | |
8839 | namespace_decl = cp_parser_lookup_name (parser, identifier, | |
eea9800f MM |
8840 | /*is_type=*/false, |
8841 | /*is_namespace=*/true, | |
8842 | /*check_dependency=*/true); | |
a723baf1 MM |
8843 | /* If it's not a namespace, issue an error. */ |
8844 | if (namespace_decl == error_mark_node | |
8845 | || TREE_CODE (namespace_decl) != NAMESPACE_DECL) | |
8846 | { | |
8847 | cp_parser_error (parser, "expected namespace-name"); | |
8848 | namespace_decl = error_mark_node; | |
8849 | } | |
8850 | ||
8851 | return namespace_decl; | |
8852 | } | |
8853 | ||
8854 | /* Parse a namespace-definition. | |
8855 | ||
8856 | namespace-definition: | |
8857 | named-namespace-definition | |
8858 | unnamed-namespace-definition | |
8859 | ||
8860 | named-namespace-definition: | |
8861 | original-namespace-definition | |
8862 | extension-namespace-definition | |
8863 | ||
8864 | original-namespace-definition: | |
8865 | namespace identifier { namespace-body } | |
8866 | ||
8867 | extension-namespace-definition: | |
8868 | namespace original-namespace-name { namespace-body } | |
8869 | ||
8870 | unnamed-namespace-definition: | |
8871 | namespace { namespace-body } */ | |
8872 | ||
8873 | static void | |
94edc4ab | 8874 | cp_parser_namespace_definition (cp_parser* parser) |
a723baf1 MM |
8875 | { |
8876 | tree identifier; | |
8877 | ||
8878 | /* Look for the `namespace' keyword. */ | |
8879 | cp_parser_require_keyword (parser, RID_NAMESPACE, "`namespace'"); | |
8880 | ||
8881 | /* Get the name of the namespace. We do not attempt to distinguish | |
8882 | between an original-namespace-definition and an | |
8883 | extension-namespace-definition at this point. The semantic | |
8884 | analysis routines are responsible for that. */ | |
8885 | if (cp_lexer_next_token_is (parser->lexer, CPP_NAME)) | |
8886 | identifier = cp_parser_identifier (parser); | |
8887 | else | |
8888 | identifier = NULL_TREE; | |
8889 | ||
8890 | /* Look for the `{' to start the namespace. */ | |
8891 | cp_parser_require (parser, CPP_OPEN_BRACE, "`{'"); | |
8892 | /* Start the namespace. */ | |
8893 | push_namespace (identifier); | |
8894 | /* Parse the body of the namespace. */ | |
8895 | cp_parser_namespace_body (parser); | |
8896 | /* Finish the namespace. */ | |
8897 | pop_namespace (); | |
8898 | /* Look for the final `}'. */ | |
8899 | cp_parser_require (parser, CPP_CLOSE_BRACE, "`}'"); | |
8900 | } | |
8901 | ||
8902 | /* Parse a namespace-body. | |
8903 | ||
8904 | namespace-body: | |
8905 | declaration-seq [opt] */ | |
8906 | ||
8907 | static void | |
94edc4ab | 8908 | cp_parser_namespace_body (cp_parser* parser) |
a723baf1 MM |
8909 | { |
8910 | cp_parser_declaration_seq_opt (parser); | |
8911 | } | |
8912 | ||
8913 | /* Parse a namespace-alias-definition. | |
8914 | ||
8915 | namespace-alias-definition: | |
8916 | namespace identifier = qualified-namespace-specifier ; */ | |
8917 | ||
8918 | static void | |
94edc4ab | 8919 | cp_parser_namespace_alias_definition (cp_parser* parser) |
a723baf1 MM |
8920 | { |
8921 | tree identifier; | |
8922 | tree namespace_specifier; | |
8923 | ||
8924 | /* Look for the `namespace' keyword. */ | |
8925 | cp_parser_require_keyword (parser, RID_NAMESPACE, "`namespace'"); | |
8926 | /* Look for the identifier. */ | |
8927 | identifier = cp_parser_identifier (parser); | |
8928 | if (identifier == error_mark_node) | |
8929 | return; | |
8930 | /* Look for the `=' token. */ | |
8931 | cp_parser_require (parser, CPP_EQ, "`='"); | |
8932 | /* Look for the qualified-namespace-specifier. */ | |
8933 | namespace_specifier | |
8934 | = cp_parser_qualified_namespace_specifier (parser); | |
8935 | /* Look for the `;' token. */ | |
8936 | cp_parser_require (parser, CPP_SEMICOLON, "`;'"); | |
8937 | ||
8938 | /* Register the alias in the symbol table. */ | |
8939 | do_namespace_alias (identifier, namespace_specifier); | |
8940 | } | |
8941 | ||
8942 | /* Parse a qualified-namespace-specifier. | |
8943 | ||
8944 | qualified-namespace-specifier: | |
8945 | :: [opt] nested-name-specifier [opt] namespace-name | |
8946 | ||
8947 | Returns a NAMESPACE_DECL corresponding to the specified | |
8948 | namespace. */ | |
8949 | ||
8950 | static tree | |
94edc4ab | 8951 | cp_parser_qualified_namespace_specifier (cp_parser* parser) |
a723baf1 MM |
8952 | { |
8953 | /* Look for the optional `::'. */ | |
8954 | cp_parser_global_scope_opt (parser, | |
8955 | /*current_scope_valid_p=*/false); | |
8956 | ||
8957 | /* Look for the optional nested-name-specifier. */ | |
8958 | cp_parser_nested_name_specifier_opt (parser, | |
8959 | /*typename_keyword_p=*/false, | |
8960 | /*check_dependency_p=*/true, | |
8961 | /*type_p=*/false); | |
8962 | ||
8963 | return cp_parser_namespace_name (parser); | |
8964 | } | |
8965 | ||
8966 | /* Parse a using-declaration. | |
8967 | ||
8968 | using-declaration: | |
8969 | using typename [opt] :: [opt] nested-name-specifier unqualified-id ; | |
8970 | using :: unqualified-id ; */ | |
8971 | ||
8972 | static void | |
94edc4ab | 8973 | cp_parser_using_declaration (cp_parser* parser) |
a723baf1 MM |
8974 | { |
8975 | cp_token *token; | |
8976 | bool typename_p = false; | |
8977 | bool global_scope_p; | |
8978 | tree decl; | |
8979 | tree identifier; | |
8980 | tree scope; | |
8981 | ||
8982 | /* Look for the `using' keyword. */ | |
8983 | cp_parser_require_keyword (parser, RID_USING, "`using'"); | |
8984 | ||
8985 | /* Peek at the next token. */ | |
8986 | token = cp_lexer_peek_token (parser->lexer); | |
8987 | /* See if it's `typename'. */ | |
8988 | if (token->keyword == RID_TYPENAME) | |
8989 | { | |
8990 | /* Remember that we've seen it. */ | |
8991 | typename_p = true; | |
8992 | /* Consume the `typename' token. */ | |
8993 | cp_lexer_consume_token (parser->lexer); | |
8994 | } | |
8995 | ||
8996 | /* Look for the optional global scope qualification. */ | |
8997 | global_scope_p | |
8998 | = (cp_parser_global_scope_opt (parser, | |
8999 | /*current_scope_valid_p=*/false) | |
9000 | != NULL_TREE); | |
9001 | ||
9002 | /* If we saw `typename', or didn't see `::', then there must be a | |
9003 | nested-name-specifier present. */ | |
9004 | if (typename_p || !global_scope_p) | |
9005 | cp_parser_nested_name_specifier (parser, typename_p, | |
9006 | /*check_dependency_p=*/true, | |
9007 | /*type_p=*/false); | |
9008 | /* Otherwise, we could be in either of the two productions. In that | |
9009 | case, treat the nested-name-specifier as optional. */ | |
9010 | else | |
9011 | cp_parser_nested_name_specifier_opt (parser, | |
9012 | /*typename_keyword_p=*/false, | |
9013 | /*check_dependency_p=*/true, | |
9014 | /*type_p=*/false); | |
9015 | ||
9016 | /* Parse the unqualified-id. */ | |
9017 | identifier = cp_parser_unqualified_id (parser, | |
9018 | /*template_keyword_p=*/false, | |
f3c2dfc6 MM |
9019 | /*check_dependency_p=*/true, |
9020 | /*declarator_p=*/true); | |
a723baf1 MM |
9021 | |
9022 | /* The function we call to handle a using-declaration is different | |
9023 | depending on what scope we are in. */ | |
f3c2dfc6 MM |
9024 | if (identifier == error_mark_node) |
9025 | ; | |
9026 | else if (TREE_CODE (identifier) != IDENTIFIER_NODE | |
9027 | && TREE_CODE (identifier) != BIT_NOT_EXPR) | |
9028 | /* [namespace.udecl] | |
9029 | ||
9030 | A using declaration shall not name a template-id. */ | |
9031 | error ("a template-id may not appear in a using-declaration"); | |
a723baf1 MM |
9032 | else |
9033 | { | |
f3c2dfc6 MM |
9034 | scope = current_scope (); |
9035 | if (scope && TYPE_P (scope)) | |
4eb6d609 | 9036 | { |
f3c2dfc6 MM |
9037 | /* Create the USING_DECL. */ |
9038 | decl = do_class_using_decl (build_nt (SCOPE_REF, | |
9039 | parser->scope, | |
9040 | identifier)); | |
9041 | /* Add it to the list of members in this class. */ | |
9042 | finish_member_declaration (decl); | |
4eb6d609 | 9043 | } |
a723baf1 | 9044 | else |
f3c2dfc6 MM |
9045 | { |
9046 | decl = cp_parser_lookup_name_simple (parser, identifier); | |
9047 | if (decl == error_mark_node) | |
9048 | { | |
9049 | if (parser->scope && parser->scope != global_namespace) | |
9050 | error ("`%D::%D' has not been declared", | |
9051 | parser->scope, identifier); | |
9052 | else | |
9053 | error ("`::%D' has not been declared", identifier); | |
9054 | } | |
9055 | else if (scope) | |
9056 | do_local_using_decl (decl); | |
9057 | else | |
9058 | do_toplevel_using_decl (decl); | |
9059 | } | |
a723baf1 MM |
9060 | } |
9061 | ||
9062 | /* Look for the final `;'. */ | |
9063 | cp_parser_require (parser, CPP_SEMICOLON, "`;'"); | |
9064 | } | |
9065 | ||
9066 | /* Parse a using-directive. | |
9067 | ||
9068 | using-directive: | |
9069 | using namespace :: [opt] nested-name-specifier [opt] | |
9070 | namespace-name ; */ | |
9071 | ||
9072 | static void | |
94edc4ab | 9073 | cp_parser_using_directive (cp_parser* parser) |
a723baf1 MM |
9074 | { |
9075 | tree namespace_decl; | |
9076 | ||
9077 | /* Look for the `using' keyword. */ | |
9078 | cp_parser_require_keyword (parser, RID_USING, "`using'"); | |
9079 | /* And the `namespace' keyword. */ | |
9080 | cp_parser_require_keyword (parser, RID_NAMESPACE, "`namespace'"); | |
9081 | /* Look for the optional `::' operator. */ | |
9082 | cp_parser_global_scope_opt (parser, /*current_scope_valid_p=*/false); | |
34cd5ae7 | 9083 | /* And the optional nested-name-specifier. */ |
a723baf1 MM |
9084 | cp_parser_nested_name_specifier_opt (parser, |
9085 | /*typename_keyword_p=*/false, | |
9086 | /*check_dependency_p=*/true, | |
9087 | /*type_p=*/false); | |
9088 | /* Get the namespace being used. */ | |
9089 | namespace_decl = cp_parser_namespace_name (parser); | |
9090 | /* Update the symbol table. */ | |
9091 | do_using_directive (namespace_decl); | |
9092 | /* Look for the final `;'. */ | |
9093 | cp_parser_require (parser, CPP_SEMICOLON, "`;'"); | |
9094 | } | |
9095 | ||
9096 | /* Parse an asm-definition. | |
9097 | ||
9098 | asm-definition: | |
9099 | asm ( string-literal ) ; | |
9100 | ||
9101 | GNU Extension: | |
9102 | ||
9103 | asm-definition: | |
9104 | asm volatile [opt] ( string-literal ) ; | |
9105 | asm volatile [opt] ( string-literal : asm-operand-list [opt] ) ; | |
9106 | asm volatile [opt] ( string-literal : asm-operand-list [opt] | |
9107 | : asm-operand-list [opt] ) ; | |
9108 | asm volatile [opt] ( string-literal : asm-operand-list [opt] | |
9109 | : asm-operand-list [opt] | |
9110 | : asm-operand-list [opt] ) ; */ | |
9111 | ||
9112 | static void | |
94edc4ab | 9113 | cp_parser_asm_definition (cp_parser* parser) |
a723baf1 MM |
9114 | { |
9115 | cp_token *token; | |
9116 | tree string; | |
9117 | tree outputs = NULL_TREE; | |
9118 | tree inputs = NULL_TREE; | |
9119 | tree clobbers = NULL_TREE; | |
9120 | tree asm_stmt; | |
9121 | bool volatile_p = false; | |
9122 | bool extended_p = false; | |
9123 | ||
9124 | /* Look for the `asm' keyword. */ | |
9125 | cp_parser_require_keyword (parser, RID_ASM, "`asm'"); | |
9126 | /* See if the next token is `volatile'. */ | |
9127 | if (cp_parser_allow_gnu_extensions_p (parser) | |
9128 | && cp_lexer_next_token_is_keyword (parser->lexer, RID_VOLATILE)) | |
9129 | { | |
9130 | /* Remember that we saw the `volatile' keyword. */ | |
9131 | volatile_p = true; | |
9132 | /* Consume the token. */ | |
9133 | cp_lexer_consume_token (parser->lexer); | |
9134 | } | |
9135 | /* Look for the opening `('. */ | |
9136 | cp_parser_require (parser, CPP_OPEN_PAREN, "`('"); | |
9137 | /* Look for the string. */ | |
9138 | token = cp_parser_require (parser, CPP_STRING, "asm body"); | |
9139 | if (!token) | |
9140 | return; | |
9141 | string = token->value; | |
9142 | /* If we're allowing GNU extensions, check for the extended assembly | |
9143 | syntax. Unfortunately, the `:' tokens need not be separated by | |
9144 | a space in C, and so, for compatibility, we tolerate that here | |
9145 | too. Doing that means that we have to treat the `::' operator as | |
9146 | two `:' tokens. */ | |
9147 | if (cp_parser_allow_gnu_extensions_p (parser) | |
9148 | && at_function_scope_p () | |
9149 | && (cp_lexer_next_token_is (parser->lexer, CPP_COLON) | |
9150 | || cp_lexer_next_token_is (parser->lexer, CPP_SCOPE))) | |
9151 | { | |
9152 | bool inputs_p = false; | |
9153 | bool clobbers_p = false; | |
9154 | ||
9155 | /* The extended syntax was used. */ | |
9156 | extended_p = true; | |
9157 | ||
9158 | /* Look for outputs. */ | |
9159 | if (cp_lexer_next_token_is (parser->lexer, CPP_COLON)) | |
9160 | { | |
9161 | /* Consume the `:'. */ | |
9162 | cp_lexer_consume_token (parser->lexer); | |
9163 | /* Parse the output-operands. */ | |
9164 | if (cp_lexer_next_token_is_not (parser->lexer, | |
9165 | CPP_COLON) | |
9166 | && cp_lexer_next_token_is_not (parser->lexer, | |
8caf4c38 MM |
9167 | CPP_SCOPE) |
9168 | && cp_lexer_next_token_is_not (parser->lexer, | |
9169 | CPP_CLOSE_PAREN)) | |
a723baf1 MM |
9170 | outputs = cp_parser_asm_operand_list (parser); |
9171 | } | |
9172 | /* If the next token is `::', there are no outputs, and the | |
9173 | next token is the beginning of the inputs. */ | |
9174 | else if (cp_lexer_next_token_is (parser->lexer, CPP_SCOPE)) | |
9175 | { | |
9176 | /* Consume the `::' token. */ | |
9177 | cp_lexer_consume_token (parser->lexer); | |
9178 | /* The inputs are coming next. */ | |
9179 | inputs_p = true; | |
9180 | } | |
9181 | ||
9182 | /* Look for inputs. */ | |
9183 | if (inputs_p | |
9184 | || cp_lexer_next_token_is (parser->lexer, CPP_COLON)) | |
9185 | { | |
9186 | if (!inputs_p) | |
9187 | /* Consume the `:'. */ | |
9188 | cp_lexer_consume_token (parser->lexer); | |
9189 | /* Parse the output-operands. */ | |
9190 | if (cp_lexer_next_token_is_not (parser->lexer, | |
9191 | CPP_COLON) | |
9192 | && cp_lexer_next_token_is_not (parser->lexer, | |
8caf4c38 MM |
9193 | CPP_SCOPE) |
9194 | && cp_lexer_next_token_is_not (parser->lexer, | |
9195 | CPP_CLOSE_PAREN)) | |
a723baf1 MM |
9196 | inputs = cp_parser_asm_operand_list (parser); |
9197 | } | |
9198 | else if (cp_lexer_next_token_is (parser->lexer, CPP_SCOPE)) | |
9199 | /* The clobbers are coming next. */ | |
9200 | clobbers_p = true; | |
9201 | ||
9202 | /* Look for clobbers. */ | |
9203 | if (clobbers_p | |
9204 | || cp_lexer_next_token_is (parser->lexer, CPP_COLON)) | |
9205 | { | |
9206 | if (!clobbers_p) | |
9207 | /* Consume the `:'. */ | |
9208 | cp_lexer_consume_token (parser->lexer); | |
9209 | /* Parse the clobbers. */ | |
8caf4c38 MM |
9210 | if (cp_lexer_next_token_is_not (parser->lexer, |
9211 | CPP_CLOSE_PAREN)) | |
9212 | clobbers = cp_parser_asm_clobber_list (parser); | |
a723baf1 MM |
9213 | } |
9214 | } | |
9215 | /* Look for the closing `)'. */ | |
9216 | if (!cp_parser_require (parser, CPP_CLOSE_PAREN, "`)'")) | |
7efa3e22 | 9217 | cp_parser_skip_to_closing_parenthesis (parser, true, false); |
a723baf1 MM |
9218 | cp_parser_require (parser, CPP_SEMICOLON, "`;'"); |
9219 | ||
9220 | /* Create the ASM_STMT. */ | |
9221 | if (at_function_scope_p ()) | |
9222 | { | |
9223 | asm_stmt = | |
9224 | finish_asm_stmt (volatile_p | |
9225 | ? ridpointers[(int) RID_VOLATILE] : NULL_TREE, | |
9226 | string, outputs, inputs, clobbers); | |
9227 | /* If the extended syntax was not used, mark the ASM_STMT. */ | |
9228 | if (!extended_p) | |
9229 | ASM_INPUT_P (asm_stmt) = 1; | |
9230 | } | |
9231 | else | |
9232 | assemble_asm (string); | |
9233 | } | |
9234 | ||
9235 | /* Declarators [gram.dcl.decl] */ | |
9236 | ||
9237 | /* Parse an init-declarator. | |
9238 | ||
9239 | init-declarator: | |
9240 | declarator initializer [opt] | |
9241 | ||
9242 | GNU Extension: | |
9243 | ||
9244 | init-declarator: | |
9245 | declarator asm-specification [opt] attributes [opt] initializer [opt] | |
9246 | ||
9247 | The DECL_SPECIFIERS and PREFIX_ATTRIBUTES apply to this declarator. | |
c8e4f0e9 | 9248 | Returns a representation of the entity declared. If MEMBER_P is TRUE, |
cf22909c KL |
9249 | then this declarator appears in a class scope. The new DECL created |
9250 | by this declarator is returned. | |
a723baf1 MM |
9251 | |
9252 | If FUNCTION_DEFINITION_ALLOWED_P then we handle the declarator and | |
9253 | for a function-definition here as well. If the declarator is a | |
9254 | declarator for a function-definition, *FUNCTION_DEFINITION_P will | |
9255 | be TRUE upon return. By that point, the function-definition will | |
9256 | have been completely parsed. | |
9257 | ||
9258 | FUNCTION_DEFINITION_P may be NULL if FUNCTION_DEFINITION_ALLOWED_P | |
9259 | is FALSE. */ | |
9260 | ||
9261 | static tree | |
94edc4ab NN |
9262 | cp_parser_init_declarator (cp_parser* parser, |
9263 | tree decl_specifiers, | |
9264 | tree prefix_attributes, | |
9265 | bool function_definition_allowed_p, | |
9266 | bool member_p, | |
560ad596 | 9267 | int declares_class_or_enum, |
94edc4ab | 9268 | bool* function_definition_p) |
a723baf1 MM |
9269 | { |
9270 | cp_token *token; | |
9271 | tree declarator; | |
9272 | tree attributes; | |
9273 | tree asm_specification; | |
9274 | tree initializer; | |
9275 | tree decl = NULL_TREE; | |
9276 | tree scope; | |
a723baf1 MM |
9277 | bool is_initialized; |
9278 | bool is_parenthesized_init; | |
39703eb9 | 9279 | bool is_non_constant_init; |
7efa3e22 | 9280 | int ctor_dtor_or_conv_p; |
a723baf1 MM |
9281 | bool friend_p; |
9282 | ||
9283 | /* Assume that this is not the declarator for a function | |
9284 | definition. */ | |
9285 | if (function_definition_p) | |
9286 | *function_definition_p = false; | |
9287 | ||
9288 | /* Defer access checks while parsing the declarator; we cannot know | |
9289 | what names are accessible until we know what is being | |
9290 | declared. */ | |
cf22909c KL |
9291 | resume_deferring_access_checks (); |
9292 | ||
a723baf1 MM |
9293 | /* Parse the declarator. */ |
9294 | declarator | |
62b8a44e | 9295 | = cp_parser_declarator (parser, CP_PARSER_DECLARATOR_NAMED, |
a723baf1 MM |
9296 | &ctor_dtor_or_conv_p); |
9297 | /* Gather up the deferred checks. */ | |
cf22909c | 9298 | stop_deferring_access_checks (); |
24c0ef37 | 9299 | |
a723baf1 MM |
9300 | /* If the DECLARATOR was erroneous, there's no need to go |
9301 | further. */ | |
9302 | if (declarator == error_mark_node) | |
cf22909c | 9303 | return error_mark_node; |
a723baf1 | 9304 | |
560ad596 MM |
9305 | cp_parser_check_for_definition_in_return_type (declarator, |
9306 | declares_class_or_enum); | |
9307 | ||
a723baf1 MM |
9308 | /* Figure out what scope the entity declared by the DECLARATOR is |
9309 | located in. `grokdeclarator' sometimes changes the scope, so | |
9310 | we compute it now. */ | |
9311 | scope = get_scope_of_declarator (declarator); | |
9312 | ||
9313 | /* If we're allowing GNU extensions, look for an asm-specification | |
9314 | and attributes. */ | |
9315 | if (cp_parser_allow_gnu_extensions_p (parser)) | |
9316 | { | |
9317 | /* Look for an asm-specification. */ | |
9318 | asm_specification = cp_parser_asm_specification_opt (parser); | |
9319 | /* And attributes. */ | |
9320 | attributes = cp_parser_attributes_opt (parser); | |
9321 | } | |
9322 | else | |
9323 | { | |
9324 | asm_specification = NULL_TREE; | |
9325 | attributes = NULL_TREE; | |
9326 | } | |
9327 | ||
9328 | /* Peek at the next token. */ | |
9329 | token = cp_lexer_peek_token (parser->lexer); | |
9330 | /* Check to see if the token indicates the start of a | |
9331 | function-definition. */ | |
9332 | if (cp_parser_token_starts_function_definition_p (token)) | |
9333 | { | |
9334 | if (!function_definition_allowed_p) | |
9335 | { | |
9336 | /* If a function-definition should not appear here, issue an | |
9337 | error message. */ | |
9338 | cp_parser_error (parser, | |
9339 | "a function-definition is not allowed here"); | |
9340 | return error_mark_node; | |
9341 | } | |
9342 | else | |
9343 | { | |
a723baf1 MM |
9344 | /* Neither attributes nor an asm-specification are allowed |
9345 | on a function-definition. */ | |
9346 | if (asm_specification) | |
9347 | error ("an asm-specification is not allowed on a function-definition"); | |
9348 | if (attributes) | |
9349 | error ("attributes are not allowed on a function-definition"); | |
9350 | /* This is a function-definition. */ | |
9351 | *function_definition_p = true; | |
9352 | ||
a723baf1 MM |
9353 | /* Parse the function definition. */ |
9354 | decl = (cp_parser_function_definition_from_specifiers_and_declarator | |
cf22909c | 9355 | (parser, decl_specifiers, prefix_attributes, declarator)); |
24c0ef37 | 9356 | |
a723baf1 MM |
9357 | return decl; |
9358 | } | |
9359 | } | |
9360 | ||
9361 | /* [dcl.dcl] | |
9362 | ||
9363 | Only in function declarations for constructors, destructors, and | |
9364 | type conversions can the decl-specifier-seq be omitted. | |
9365 | ||
9366 | We explicitly postpone this check past the point where we handle | |
9367 | function-definitions because we tolerate function-definitions | |
9368 | that are missing their return types in some modes. */ | |
7efa3e22 | 9369 | if (!decl_specifiers && ctor_dtor_or_conv_p <= 0) |
a723baf1 MM |
9370 | { |
9371 | cp_parser_error (parser, | |
9372 | "expected constructor, destructor, or type conversion"); | |
9373 | return error_mark_node; | |
9374 | } | |
9375 | ||
9376 | /* An `=' or an `(' indicates an initializer. */ | |
9377 | is_initialized = (token->type == CPP_EQ | |
9378 | || token->type == CPP_OPEN_PAREN); | |
9379 | /* If the init-declarator isn't initialized and isn't followed by a | |
9380 | `,' or `;', it's not a valid init-declarator. */ | |
9381 | if (!is_initialized | |
9382 | && token->type != CPP_COMMA | |
9383 | && token->type != CPP_SEMICOLON) | |
9384 | { | |
9385 | cp_parser_error (parser, "expected init-declarator"); | |
9386 | return error_mark_node; | |
9387 | } | |
9388 | ||
9389 | /* Because start_decl has side-effects, we should only call it if we | |
9390 | know we're going ahead. By this point, we know that we cannot | |
9391 | possibly be looking at any other construct. */ | |
9392 | cp_parser_commit_to_tentative_parse (parser); | |
9393 | ||
9394 | /* Check to see whether or not this declaration is a friend. */ | |
9395 | friend_p = cp_parser_friend_p (decl_specifiers); | |
9396 | ||
9397 | /* Check that the number of template-parameter-lists is OK. */ | |
ee3071ef | 9398 | if (!cp_parser_check_declarator_template_parameters (parser, declarator)) |
cf22909c | 9399 | return error_mark_node; |
a723baf1 MM |
9400 | |
9401 | /* Enter the newly declared entry in the symbol table. If we're | |
9402 | processing a declaration in a class-specifier, we wait until | |
9403 | after processing the initializer. */ | |
9404 | if (!member_p) | |
9405 | { | |
9406 | if (parser->in_unbraced_linkage_specification_p) | |
9407 | { | |
9408 | decl_specifiers = tree_cons (error_mark_node, | |
9409 | get_identifier ("extern"), | |
9410 | decl_specifiers); | |
9411 | have_extern_spec = false; | |
9412 | } | |
ee3071ef NS |
9413 | decl = start_decl (declarator, decl_specifiers, |
9414 | is_initialized, attributes, prefix_attributes); | |
a723baf1 MM |
9415 | } |
9416 | ||
9417 | /* Enter the SCOPE. That way unqualified names appearing in the | |
9418 | initializer will be looked up in SCOPE. */ | |
9419 | if (scope) | |
9420 | push_scope (scope); | |
9421 | ||
9422 | /* Perform deferred access control checks, now that we know in which | |
9423 | SCOPE the declared entity resides. */ | |
9424 | if (!member_p && decl) | |
9425 | { | |
9426 | tree saved_current_function_decl = NULL_TREE; | |
9427 | ||
9428 | /* If the entity being declared is a function, pretend that we | |
9429 | are in its scope. If it is a `friend', it may have access to | |
9bcb9aae | 9430 | things that would not otherwise be accessible. */ |
a723baf1 MM |
9431 | if (TREE_CODE (decl) == FUNCTION_DECL) |
9432 | { | |
9433 | saved_current_function_decl = current_function_decl; | |
9434 | current_function_decl = decl; | |
9435 | } | |
9436 | ||
cf22909c KL |
9437 | /* Perform the access control checks for the declarator and the |
9438 | the decl-specifiers. */ | |
9439 | perform_deferred_access_checks (); | |
a723baf1 MM |
9440 | |
9441 | /* Restore the saved value. */ | |
9442 | if (TREE_CODE (decl) == FUNCTION_DECL) | |
9443 | current_function_decl = saved_current_function_decl; | |
9444 | } | |
9445 | ||
9446 | /* Parse the initializer. */ | |
9447 | if (is_initialized) | |
39703eb9 MM |
9448 | initializer = cp_parser_initializer (parser, |
9449 | &is_parenthesized_init, | |
9450 | &is_non_constant_init); | |
a723baf1 MM |
9451 | else |
9452 | { | |
9453 | initializer = NULL_TREE; | |
9454 | is_parenthesized_init = false; | |
39703eb9 | 9455 | is_non_constant_init = true; |
a723baf1 MM |
9456 | } |
9457 | ||
9458 | /* The old parser allows attributes to appear after a parenthesized | |
9459 | initializer. Mark Mitchell proposed removing this functionality | |
9460 | on the GCC mailing lists on 2002-08-13. This parser accepts the | |
9461 | attributes -- but ignores them. */ | |
9462 | if (cp_parser_allow_gnu_extensions_p (parser) && is_parenthesized_init) | |
9463 | if (cp_parser_attributes_opt (parser)) | |
9464 | warning ("attributes after parenthesized initializer ignored"); | |
9465 | ||
9466 | /* Leave the SCOPE, now that we have processed the initializer. It | |
9467 | is important to do this before calling cp_finish_decl because it | |
9468 | makes decisions about whether to create DECL_STMTs or not based | |
9469 | on the current scope. */ | |
9470 | if (scope) | |
9471 | pop_scope (scope); | |
9472 | ||
9473 | /* For an in-class declaration, use `grokfield' to create the | |
9474 | declaration. */ | |
9475 | if (member_p) | |
8db1028e NS |
9476 | { |
9477 | decl = grokfield (declarator, decl_specifiers, | |
9478 | initializer, /*asmspec=*/NULL_TREE, | |
a723baf1 | 9479 | /*attributes=*/NULL_TREE); |
8db1028e NS |
9480 | if (decl && TREE_CODE (decl) == FUNCTION_DECL) |
9481 | cp_parser_save_default_args (parser, decl); | |
9482 | } | |
9483 | ||
a723baf1 MM |
9484 | /* Finish processing the declaration. But, skip friend |
9485 | declarations. */ | |
9486 | if (!friend_p && decl) | |
9487 | cp_finish_decl (decl, | |
9488 | initializer, | |
9489 | asm_specification, | |
9490 | /* If the initializer is in parentheses, then this is | |
9491 | a direct-initialization, which means that an | |
9492 | `explicit' constructor is OK. Otherwise, an | |
9493 | `explicit' constructor cannot be used. */ | |
9494 | ((is_parenthesized_init || !is_initialized) | |
9495 | ? 0 : LOOKUP_ONLYCONVERTING)); | |
9496 | ||
39703eb9 MM |
9497 | /* Remember whether or not variables were initialized by |
9498 | constant-expressions. */ | |
9499 | if (decl && TREE_CODE (decl) == VAR_DECL | |
9500 | && is_initialized && !is_non_constant_init) | |
9501 | DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (decl) = true; | |
9502 | ||
a723baf1 MM |
9503 | return decl; |
9504 | } | |
9505 | ||
9506 | /* Parse a declarator. | |
9507 | ||
9508 | declarator: | |
9509 | direct-declarator | |
9510 | ptr-operator declarator | |
9511 | ||
9512 | abstract-declarator: | |
9513 | ptr-operator abstract-declarator [opt] | |
9514 | direct-abstract-declarator | |
9515 | ||
9516 | GNU Extensions: | |
9517 | ||
9518 | declarator: | |
9519 | attributes [opt] direct-declarator | |
9520 | attributes [opt] ptr-operator declarator | |
9521 | ||
9522 | abstract-declarator: | |
9523 | attributes [opt] ptr-operator abstract-declarator [opt] | |
9524 | attributes [opt] direct-abstract-declarator | |
9525 | ||
9526 | Returns a representation of the declarator. If the declarator has | |
9527 | the form `* declarator', then an INDIRECT_REF is returned, whose | |
34cd5ae7 | 9528 | only operand is the sub-declarator. Analogously, `& declarator' is |
a723baf1 MM |
9529 | represented as an ADDR_EXPR. For `X::* declarator', a SCOPE_REF is |
9530 | used. The first operand is the TYPE for `X'. The second operand | |
9531 | is an INDIRECT_REF whose operand is the sub-declarator. | |
9532 | ||
34cd5ae7 | 9533 | Otherwise, the representation is as for a direct-declarator. |
a723baf1 MM |
9534 | |
9535 | (It would be better to define a structure type to represent | |
9536 | declarators, rather than abusing `tree' nodes to represent | |
9537 | declarators. That would be much clearer and save some memory. | |
9538 | There is no reason for declarators to be garbage-collected, for | |
9539 | example; they are created during parser and no longer needed after | |
9540 | `grokdeclarator' has been called.) | |
9541 | ||
9542 | For a ptr-operator that has the optional cv-qualifier-seq, | |
9543 | cv-qualifiers will be stored in the TREE_TYPE of the INDIRECT_REF | |
9544 | node. | |
9545 | ||
7efa3e22 NS |
9546 | If CTOR_DTOR_OR_CONV_P is not NULL, *CTOR_DTOR_OR_CONV_P is used to |
9547 | detect constructor, destructor or conversion operators. It is set | |
9548 | to -1 if the declarator is a name, and +1 if it is a | |
9549 | function. Otherwise it is set to zero. Usually you just want to | |
9550 | test for >0, but internally the negative value is used. | |
9551 | ||
a723baf1 MM |
9552 | (The reason for CTOR_DTOR_OR_CONV_P is that a declaration must have |
9553 | a decl-specifier-seq unless it declares a constructor, destructor, | |
9554 | or conversion. It might seem that we could check this condition in | |
9555 | semantic analysis, rather than parsing, but that makes it difficult | |
9556 | to handle something like `f()'. We want to notice that there are | |
9557 | no decl-specifiers, and therefore realize that this is an | |
9558 | expression, not a declaration.) */ | |
9559 | ||
9560 | static tree | |
94edc4ab NN |
9561 | cp_parser_declarator (cp_parser* parser, |
9562 | cp_parser_declarator_kind dcl_kind, | |
7efa3e22 | 9563 | int* ctor_dtor_or_conv_p) |
a723baf1 MM |
9564 | { |
9565 | cp_token *token; | |
9566 | tree declarator; | |
9567 | enum tree_code code; | |
9568 | tree cv_qualifier_seq; | |
9569 | tree class_type; | |
9570 | tree attributes = NULL_TREE; | |
9571 | ||
9572 | /* Assume this is not a constructor, destructor, or type-conversion | |
9573 | operator. */ | |
9574 | if (ctor_dtor_or_conv_p) | |
7efa3e22 | 9575 | *ctor_dtor_or_conv_p = 0; |
a723baf1 MM |
9576 | |
9577 | if (cp_parser_allow_gnu_extensions_p (parser)) | |
9578 | attributes = cp_parser_attributes_opt (parser); | |
9579 | ||
9580 | /* Peek at the next token. */ | |
9581 | token = cp_lexer_peek_token (parser->lexer); | |
9582 | ||
9583 | /* Check for the ptr-operator production. */ | |
9584 | cp_parser_parse_tentatively (parser); | |
9585 | /* Parse the ptr-operator. */ | |
9586 | code = cp_parser_ptr_operator (parser, | |
9587 | &class_type, | |
9588 | &cv_qualifier_seq); | |
9589 | /* If that worked, then we have a ptr-operator. */ | |
9590 | if (cp_parser_parse_definitely (parser)) | |
9591 | { | |
9592 | /* The dependent declarator is optional if we are parsing an | |
9593 | abstract-declarator. */ | |
62b8a44e | 9594 | if (dcl_kind != CP_PARSER_DECLARATOR_NAMED) |
a723baf1 MM |
9595 | cp_parser_parse_tentatively (parser); |
9596 | ||
9597 | /* Parse the dependent declarator. */ | |
62b8a44e | 9598 | declarator = cp_parser_declarator (parser, dcl_kind, |
a723baf1 MM |
9599 | /*ctor_dtor_or_conv_p=*/NULL); |
9600 | ||
9601 | /* If we are parsing an abstract-declarator, we must handle the | |
9602 | case where the dependent declarator is absent. */ | |
62b8a44e NS |
9603 | if (dcl_kind != CP_PARSER_DECLARATOR_NAMED |
9604 | && !cp_parser_parse_definitely (parser)) | |
a723baf1 MM |
9605 | declarator = NULL_TREE; |
9606 | ||
9607 | /* Build the representation of the ptr-operator. */ | |
9608 | if (code == INDIRECT_REF) | |
9609 | declarator = make_pointer_declarator (cv_qualifier_seq, | |
9610 | declarator); | |
9611 | else | |
9612 | declarator = make_reference_declarator (cv_qualifier_seq, | |
9613 | declarator); | |
9614 | /* Handle the pointer-to-member case. */ | |
9615 | if (class_type) | |
9616 | declarator = build_nt (SCOPE_REF, class_type, declarator); | |
9617 | } | |
9618 | /* Everything else is a direct-declarator. */ | |
9619 | else | |
7efa3e22 | 9620 | declarator = cp_parser_direct_declarator (parser, dcl_kind, |
a723baf1 MM |
9621 | ctor_dtor_or_conv_p); |
9622 | ||
9623 | if (attributes && declarator != error_mark_node) | |
9624 | declarator = tree_cons (attributes, declarator, NULL_TREE); | |
9625 | ||
9626 | return declarator; | |
9627 | } | |
9628 | ||
9629 | /* Parse a direct-declarator or direct-abstract-declarator. | |
9630 | ||
9631 | direct-declarator: | |
9632 | declarator-id | |
9633 | direct-declarator ( parameter-declaration-clause ) | |
9634 | cv-qualifier-seq [opt] | |
9635 | exception-specification [opt] | |
9636 | direct-declarator [ constant-expression [opt] ] | |
9637 | ( declarator ) | |
9638 | ||
9639 | direct-abstract-declarator: | |
9640 | direct-abstract-declarator [opt] | |
9641 | ( parameter-declaration-clause ) | |
9642 | cv-qualifier-seq [opt] | |
9643 | exception-specification [opt] | |
9644 | direct-abstract-declarator [opt] [ constant-expression [opt] ] | |
9645 | ( abstract-declarator ) | |
9646 | ||
62b8a44e NS |
9647 | Returns a representation of the declarator. DCL_KIND is |
9648 | CP_PARSER_DECLARATOR_ABSTRACT, if we are parsing a | |
9649 | direct-abstract-declarator. It is CP_PARSER_DECLARATOR_NAMED, if | |
9650 | we are parsing a direct-declarator. It is | |
9651 | CP_PARSER_DECLARATOR_EITHER, if we can accept either - in the case | |
9652 | of ambiguity we prefer an abstract declarator, as per | |
9653 | [dcl.ambig.res]. CTOR_DTOR_OR_CONV_P is as for | |
a723baf1 MM |
9654 | cp_parser_declarator. |
9655 | ||
9656 | For the declarator-id production, the representation is as for an | |
9657 | id-expression, except that a qualified name is represented as a | |
9658 | SCOPE_REF. A function-declarator is represented as a CALL_EXPR; | |
9659 | see the documentation of the FUNCTION_DECLARATOR_* macros for | |
9660 | information about how to find the various declarator components. | |
9661 | An array-declarator is represented as an ARRAY_REF. The | |
9662 | direct-declarator is the first operand; the constant-expression | |
9663 | indicating the size of the array is the second operand. */ | |
9664 | ||
9665 | static tree | |
94edc4ab NN |
9666 | cp_parser_direct_declarator (cp_parser* parser, |
9667 | cp_parser_declarator_kind dcl_kind, | |
7efa3e22 | 9668 | int* ctor_dtor_or_conv_p) |
a723baf1 MM |
9669 | { |
9670 | cp_token *token; | |
62b8a44e | 9671 | tree declarator = NULL_TREE; |
a723baf1 MM |
9672 | tree scope = NULL_TREE; |
9673 | bool saved_default_arg_ok_p = parser->default_arg_ok_p; | |
9674 | bool saved_in_declarator_p = parser->in_declarator_p; | |
62b8a44e NS |
9675 | bool first = true; |
9676 | ||
9677 | while (true) | |
a723baf1 | 9678 | { |
62b8a44e NS |
9679 | /* Peek at the next token. */ |
9680 | token = cp_lexer_peek_token (parser->lexer); | |
9681 | if (token->type == CPP_OPEN_PAREN) | |
a723baf1 | 9682 | { |
62b8a44e NS |
9683 | /* This is either a parameter-declaration-clause, or a |
9684 | parenthesized declarator. When we know we are parsing a | |
34cd5ae7 | 9685 | named declarator, it must be a parenthesized declarator |
62b8a44e NS |
9686 | if FIRST is true. For instance, `(int)' is a |
9687 | parameter-declaration-clause, with an omitted | |
9688 | direct-abstract-declarator. But `((*))', is a | |
9689 | parenthesized abstract declarator. Finally, when T is a | |
9690 | template parameter `(T)' is a | |
34cd5ae7 | 9691 | parameter-declaration-clause, and not a parenthesized |
62b8a44e | 9692 | named declarator. |
a723baf1 | 9693 | |
62b8a44e NS |
9694 | We first try and parse a parameter-declaration-clause, |
9695 | and then try a nested declarator (if FIRST is true). | |
a723baf1 | 9696 | |
62b8a44e NS |
9697 | It is not an error for it not to be a |
9698 | parameter-declaration-clause, even when FIRST is | |
9699 | false. Consider, | |
9700 | ||
9701 | int i (int); | |
9702 | int i (3); | |
9703 | ||
9704 | The first is the declaration of a function while the | |
9705 | second is a the definition of a variable, including its | |
9706 | initializer. | |
9707 | ||
9708 | Having seen only the parenthesis, we cannot know which of | |
9709 | these two alternatives should be selected. Even more | |
9710 | complex are examples like: | |
9711 | ||
9712 | int i (int (a)); | |
9713 | int i (int (3)); | |
9714 | ||
9715 | The former is a function-declaration; the latter is a | |
9716 | variable initialization. | |
9717 | ||
34cd5ae7 | 9718 | Thus again, we try a parameter-declaration-clause, and if |
62b8a44e NS |
9719 | that fails, we back out and return. */ |
9720 | ||
9721 | if (!first || dcl_kind != CP_PARSER_DECLARATOR_NAMED) | |
a723baf1 | 9722 | { |
62b8a44e NS |
9723 | tree params; |
9724 | ||
9725 | cp_parser_parse_tentatively (parser); | |
a723baf1 | 9726 | |
62b8a44e NS |
9727 | /* Consume the `('. */ |
9728 | cp_lexer_consume_token (parser->lexer); | |
9729 | if (first) | |
9730 | { | |
9731 | /* If this is going to be an abstract declarator, we're | |
9732 | in a declarator and we can't have default args. */ | |
9733 | parser->default_arg_ok_p = false; | |
9734 | parser->in_declarator_p = true; | |
9735 | } | |
9736 | ||
9737 | /* Parse the parameter-declaration-clause. */ | |
9738 | params = cp_parser_parameter_declaration_clause (parser); | |
9739 | ||
9740 | /* If all went well, parse the cv-qualifier-seq and the | |
34cd5ae7 | 9741 | exception-specification. */ |
62b8a44e NS |
9742 | if (cp_parser_parse_definitely (parser)) |
9743 | { | |
9744 | tree cv_qualifiers; | |
9745 | tree exception_specification; | |
7efa3e22 NS |
9746 | |
9747 | if (ctor_dtor_or_conv_p) | |
9748 | *ctor_dtor_or_conv_p = *ctor_dtor_or_conv_p < 0; | |
62b8a44e NS |
9749 | first = false; |
9750 | /* Consume the `)'. */ | |
9751 | cp_parser_require (parser, CPP_CLOSE_PAREN, "`)'"); | |
9752 | ||
9753 | /* Parse the cv-qualifier-seq. */ | |
9754 | cv_qualifiers = cp_parser_cv_qualifier_seq_opt (parser); | |
9755 | /* And the exception-specification. */ | |
9756 | exception_specification | |
9757 | = cp_parser_exception_specification_opt (parser); | |
9758 | ||
9759 | /* Create the function-declarator. */ | |
9760 | declarator = make_call_declarator (declarator, | |
9761 | params, | |
9762 | cv_qualifiers, | |
9763 | exception_specification); | |
9764 | /* Any subsequent parameter lists are to do with | |
9765 | return type, so are not those of the declared | |
9766 | function. */ | |
9767 | parser->default_arg_ok_p = false; | |
9768 | ||
9769 | /* Repeat the main loop. */ | |
9770 | continue; | |
9771 | } | |
9772 | } | |
9773 | ||
9774 | /* If this is the first, we can try a parenthesized | |
9775 | declarator. */ | |
9776 | if (first) | |
a723baf1 | 9777 | { |
a723baf1 | 9778 | parser->default_arg_ok_p = saved_default_arg_ok_p; |
62b8a44e NS |
9779 | parser->in_declarator_p = saved_in_declarator_p; |
9780 | ||
9781 | /* Consume the `('. */ | |
9782 | cp_lexer_consume_token (parser->lexer); | |
9783 | /* Parse the nested declarator. */ | |
9784 | declarator | |
9785 | = cp_parser_declarator (parser, dcl_kind, ctor_dtor_or_conv_p); | |
9786 | first = false; | |
9787 | /* Expect a `)'. */ | |
9788 | if (!cp_parser_require (parser, CPP_CLOSE_PAREN, "`)'")) | |
9789 | declarator = error_mark_node; | |
9790 | if (declarator == error_mark_node) | |
9791 | break; | |
9792 | ||
9793 | goto handle_declarator; | |
a723baf1 | 9794 | } |
9bcb9aae | 9795 | /* Otherwise, we must be done. */ |
62b8a44e NS |
9796 | else |
9797 | break; | |
a723baf1 | 9798 | } |
62b8a44e NS |
9799 | else if ((!first || dcl_kind != CP_PARSER_DECLARATOR_NAMED) |
9800 | && token->type == CPP_OPEN_SQUARE) | |
a723baf1 | 9801 | { |
62b8a44e | 9802 | /* Parse an array-declarator. */ |
a723baf1 MM |
9803 | tree bounds; |
9804 | ||
7efa3e22 NS |
9805 | if (ctor_dtor_or_conv_p) |
9806 | *ctor_dtor_or_conv_p = 0; | |
9807 | ||
62b8a44e NS |
9808 | first = false; |
9809 | parser->default_arg_ok_p = false; | |
9810 | parser->in_declarator_p = true; | |
a723baf1 MM |
9811 | /* Consume the `['. */ |
9812 | cp_lexer_consume_token (parser->lexer); | |
9813 | /* Peek at the next token. */ | |
9814 | token = cp_lexer_peek_token (parser->lexer); | |
9815 | /* If the next token is `]', then there is no | |
9816 | constant-expression. */ | |
9817 | if (token->type != CPP_CLOSE_SQUARE) | |
14d22dd6 MM |
9818 | { |
9819 | bool non_constant_p; | |
9820 | ||
9821 | bounds | |
9822 | = cp_parser_constant_expression (parser, | |
9823 | /*allow_non_constant=*/true, | |
9824 | &non_constant_p); | |
d17811fd MM |
9825 | if (!non_constant_p) |
9826 | bounds = cp_parser_fold_non_dependent_expr (bounds); | |
14d22dd6 | 9827 | } |
a723baf1 MM |
9828 | else |
9829 | bounds = NULL_TREE; | |
9830 | /* Look for the closing `]'. */ | |
62b8a44e NS |
9831 | if (!cp_parser_require (parser, CPP_CLOSE_SQUARE, "`]'")) |
9832 | { | |
9833 | declarator = error_mark_node; | |
9834 | break; | |
9835 | } | |
a723baf1 MM |
9836 | |
9837 | declarator = build_nt (ARRAY_REF, declarator, bounds); | |
9838 | } | |
62b8a44e | 9839 | else if (first && dcl_kind != CP_PARSER_DECLARATOR_ABSTRACT) |
a723baf1 | 9840 | { |
62b8a44e NS |
9841 | /* Parse a declarator_id */ |
9842 | if (dcl_kind == CP_PARSER_DECLARATOR_EITHER) | |
9843 | cp_parser_parse_tentatively (parser); | |
9844 | declarator = cp_parser_declarator_id (parser); | |
712becab NS |
9845 | if (dcl_kind == CP_PARSER_DECLARATOR_EITHER) |
9846 | { | |
9847 | if (!cp_parser_parse_definitely (parser)) | |
9848 | declarator = error_mark_node; | |
9849 | else if (TREE_CODE (declarator) != IDENTIFIER_NODE) | |
9850 | { | |
9851 | cp_parser_error (parser, "expected unqualified-id"); | |
9852 | declarator = error_mark_node; | |
9853 | } | |
9854 | } | |
9855 | ||
62b8a44e NS |
9856 | if (declarator == error_mark_node) |
9857 | break; | |
a723baf1 | 9858 | |
62b8a44e NS |
9859 | if (TREE_CODE (declarator) == SCOPE_REF) |
9860 | { | |
9861 | tree scope = TREE_OPERAND (declarator, 0); | |
712becab | 9862 | |
62b8a44e NS |
9863 | /* In the declaration of a member of a template class |
9864 | outside of the class itself, the SCOPE will sometimes | |
9865 | be a TYPENAME_TYPE. For example, given: | |
9866 | ||
9867 | template <typename T> | |
9868 | int S<T>::R::i = 3; | |
9869 | ||
9870 | the SCOPE will be a TYPENAME_TYPE for `S<T>::R'. In | |
9871 | this context, we must resolve S<T>::R to an ordinary | |
9872 | type, rather than a typename type. | |
9873 | ||
9874 | The reason we normally avoid resolving TYPENAME_TYPEs | |
9875 | is that a specialization of `S' might render | |
9876 | `S<T>::R' not a type. However, if `S' is | |
9877 | specialized, then this `i' will not be used, so there | |
9878 | is no harm in resolving the types here. */ | |
9879 | if (TREE_CODE (scope) == TYPENAME_TYPE) | |
9880 | { | |
14d22dd6 MM |
9881 | tree type; |
9882 | ||
62b8a44e | 9883 | /* Resolve the TYPENAME_TYPE. */ |
14d22dd6 MM |
9884 | type = resolve_typename_type (scope, |
9885 | /*only_current_p=*/false); | |
62b8a44e | 9886 | /* If that failed, the declarator is invalid. */ |
14d22dd6 MM |
9887 | if (type != error_mark_node) |
9888 | scope = type; | |
62b8a44e NS |
9889 | /* Build a new DECLARATOR. */ |
9890 | declarator = build_nt (SCOPE_REF, | |
9891 | scope, | |
9892 | TREE_OPERAND (declarator, 1)); | |
9893 | } | |
9894 | } | |
9895 | ||
9896 | /* Check to see whether the declarator-id names a constructor, | |
9897 | destructor, or conversion. */ | |
9898 | if (declarator && ctor_dtor_or_conv_p | |
9899 | && ((TREE_CODE (declarator) == SCOPE_REF | |
9900 | && CLASS_TYPE_P (TREE_OPERAND (declarator, 0))) | |
9901 | || (TREE_CODE (declarator) != SCOPE_REF | |
9902 | && at_class_scope_p ()))) | |
a723baf1 | 9903 | { |
62b8a44e NS |
9904 | tree unqualified_name; |
9905 | tree class_type; | |
9906 | ||
9907 | /* Get the unqualified part of the name. */ | |
9908 | if (TREE_CODE (declarator) == SCOPE_REF) | |
9909 | { | |
9910 | class_type = TREE_OPERAND (declarator, 0); | |
9911 | unqualified_name = TREE_OPERAND (declarator, 1); | |
9912 | } | |
9913 | else | |
9914 | { | |
9915 | class_type = current_class_type; | |
9916 | unqualified_name = declarator; | |
9917 | } | |
9918 | ||
9919 | /* See if it names ctor, dtor or conv. */ | |
9920 | if (TREE_CODE (unqualified_name) == BIT_NOT_EXPR | |
9921 | || IDENTIFIER_TYPENAME_P (unqualified_name) | |
9922 | || constructor_name_p (unqualified_name, class_type)) | |
7efa3e22 | 9923 | *ctor_dtor_or_conv_p = -1; |
a723baf1 | 9924 | } |
62b8a44e NS |
9925 | |
9926 | handle_declarator:; | |
9927 | scope = get_scope_of_declarator (declarator); | |
9928 | if (scope) | |
9929 | /* Any names that appear after the declarator-id for a member | |
9930 | are looked up in the containing scope. */ | |
9931 | push_scope (scope); | |
9932 | parser->in_declarator_p = true; | |
9933 | if ((ctor_dtor_or_conv_p && *ctor_dtor_or_conv_p) | |
9934 | || (declarator | |
9935 | && (TREE_CODE (declarator) == SCOPE_REF | |
9936 | || TREE_CODE (declarator) == IDENTIFIER_NODE))) | |
9937 | /* Default args are only allowed on function | |
9938 | declarations. */ | |
9939 | parser->default_arg_ok_p = saved_default_arg_ok_p; | |
a723baf1 | 9940 | else |
62b8a44e NS |
9941 | parser->default_arg_ok_p = false; |
9942 | ||
9943 | first = false; | |
a723baf1 | 9944 | } |
62b8a44e | 9945 | /* We're done. */ |
a723baf1 MM |
9946 | else |
9947 | break; | |
a723baf1 MM |
9948 | } |
9949 | ||
9950 | /* For an abstract declarator, we might wind up with nothing at this | |
9951 | point. That's an error; the declarator is not optional. */ | |
9952 | if (!declarator) | |
9953 | cp_parser_error (parser, "expected declarator"); | |
9954 | ||
9955 | /* If we entered a scope, we must exit it now. */ | |
9956 | if (scope) | |
9957 | pop_scope (scope); | |
9958 | ||
9959 | parser->default_arg_ok_p = saved_default_arg_ok_p; | |
9960 | parser->in_declarator_p = saved_in_declarator_p; | |
9961 | ||
9962 | return declarator; | |
9963 | } | |
9964 | ||
9965 | /* Parse a ptr-operator. | |
9966 | ||
9967 | ptr-operator: | |
9968 | * cv-qualifier-seq [opt] | |
9969 | & | |
9970 | :: [opt] nested-name-specifier * cv-qualifier-seq [opt] | |
9971 | ||
9972 | GNU Extension: | |
9973 | ||
9974 | ptr-operator: | |
9975 | & cv-qualifier-seq [opt] | |
9976 | ||
9977 | Returns INDIRECT_REF if a pointer, or pointer-to-member, was | |
9978 | used. Returns ADDR_EXPR if a reference was used. In the | |
9979 | case of a pointer-to-member, *TYPE is filled in with the | |
9980 | TYPE containing the member. *CV_QUALIFIER_SEQ is filled in | |
9981 | with the cv-qualifier-seq, or NULL_TREE, if there are no | |
9982 | cv-qualifiers. Returns ERROR_MARK if an error occurred. */ | |
9983 | ||
9984 | static enum tree_code | |
94edc4ab NN |
9985 | cp_parser_ptr_operator (cp_parser* parser, |
9986 | tree* type, | |
9987 | tree* cv_qualifier_seq) | |
a723baf1 MM |
9988 | { |
9989 | enum tree_code code = ERROR_MARK; | |
9990 | cp_token *token; | |
9991 | ||
9992 | /* Assume that it's not a pointer-to-member. */ | |
9993 | *type = NULL_TREE; | |
9994 | /* And that there are no cv-qualifiers. */ | |
9995 | *cv_qualifier_seq = NULL_TREE; | |
9996 | ||
9997 | /* Peek at the next token. */ | |
9998 | token = cp_lexer_peek_token (parser->lexer); | |
9999 | /* If it's a `*' or `&' we have a pointer or reference. */ | |
10000 | if (token->type == CPP_MULT || token->type == CPP_AND) | |
10001 | { | |
10002 | /* Remember which ptr-operator we were processing. */ | |
10003 | code = (token->type == CPP_AND ? ADDR_EXPR : INDIRECT_REF); | |
10004 | ||
10005 | /* Consume the `*' or `&'. */ | |
10006 | cp_lexer_consume_token (parser->lexer); | |
10007 | ||
10008 | /* A `*' can be followed by a cv-qualifier-seq, and so can a | |
10009 | `&', if we are allowing GNU extensions. (The only qualifier | |
10010 | that can legally appear after `&' is `restrict', but that is | |
10011 | enforced during semantic analysis. */ | |
10012 | if (code == INDIRECT_REF | |
10013 | || cp_parser_allow_gnu_extensions_p (parser)) | |
10014 | *cv_qualifier_seq = cp_parser_cv_qualifier_seq_opt (parser); | |
10015 | } | |
10016 | else | |
10017 | { | |
10018 | /* Try the pointer-to-member case. */ | |
10019 | cp_parser_parse_tentatively (parser); | |
10020 | /* Look for the optional `::' operator. */ | |
10021 | cp_parser_global_scope_opt (parser, | |
10022 | /*current_scope_valid_p=*/false); | |
10023 | /* Look for the nested-name specifier. */ | |
10024 | cp_parser_nested_name_specifier (parser, | |
10025 | /*typename_keyword_p=*/false, | |
10026 | /*check_dependency_p=*/true, | |
10027 | /*type_p=*/false); | |
10028 | /* If we found it, and the next token is a `*', then we are | |
10029 | indeed looking at a pointer-to-member operator. */ | |
10030 | if (!cp_parser_error_occurred (parser) | |
10031 | && cp_parser_require (parser, CPP_MULT, "`*'")) | |
10032 | { | |
10033 | /* The type of which the member is a member is given by the | |
10034 | current SCOPE. */ | |
10035 | *type = parser->scope; | |
10036 | /* The next name will not be qualified. */ | |
10037 | parser->scope = NULL_TREE; | |
10038 | parser->qualifying_scope = NULL_TREE; | |
10039 | parser->object_scope = NULL_TREE; | |
10040 | /* Indicate that the `*' operator was used. */ | |
10041 | code = INDIRECT_REF; | |
10042 | /* Look for the optional cv-qualifier-seq. */ | |
10043 | *cv_qualifier_seq = cp_parser_cv_qualifier_seq_opt (parser); | |
10044 | } | |
10045 | /* If that didn't work we don't have a ptr-operator. */ | |
10046 | if (!cp_parser_parse_definitely (parser)) | |
10047 | cp_parser_error (parser, "expected ptr-operator"); | |
10048 | } | |
10049 | ||
10050 | return code; | |
10051 | } | |
10052 | ||
10053 | /* Parse an (optional) cv-qualifier-seq. | |
10054 | ||
10055 | cv-qualifier-seq: | |
10056 | cv-qualifier cv-qualifier-seq [opt] | |
10057 | ||
10058 | Returns a TREE_LIST. The TREE_VALUE of each node is the | |
10059 | representation of a cv-qualifier. */ | |
10060 | ||
10061 | static tree | |
94edc4ab | 10062 | cp_parser_cv_qualifier_seq_opt (cp_parser* parser) |
a723baf1 MM |
10063 | { |
10064 | tree cv_qualifiers = NULL_TREE; | |
10065 | ||
10066 | while (true) | |
10067 | { | |
10068 | tree cv_qualifier; | |
10069 | ||
10070 | /* Look for the next cv-qualifier. */ | |
10071 | cv_qualifier = cp_parser_cv_qualifier_opt (parser); | |
10072 | /* If we didn't find one, we're done. */ | |
10073 | if (!cv_qualifier) | |
10074 | break; | |
10075 | ||
10076 | /* Add this cv-qualifier to the list. */ | |
10077 | cv_qualifiers | |
10078 | = tree_cons (NULL_TREE, cv_qualifier, cv_qualifiers); | |
10079 | } | |
10080 | ||
10081 | /* We built up the list in reverse order. */ | |
10082 | return nreverse (cv_qualifiers); | |
10083 | } | |
10084 | ||
10085 | /* Parse an (optional) cv-qualifier. | |
10086 | ||
10087 | cv-qualifier: | |
10088 | const | |
10089 | volatile | |
10090 | ||
10091 | GNU Extension: | |
10092 | ||
10093 | cv-qualifier: | |
10094 | __restrict__ */ | |
10095 | ||
10096 | static tree | |
94edc4ab | 10097 | cp_parser_cv_qualifier_opt (cp_parser* parser) |
a723baf1 MM |
10098 | { |
10099 | cp_token *token; | |
10100 | tree cv_qualifier = NULL_TREE; | |
10101 | ||
10102 | /* Peek at the next token. */ | |
10103 | token = cp_lexer_peek_token (parser->lexer); | |
10104 | /* See if it's a cv-qualifier. */ | |
10105 | switch (token->keyword) | |
10106 | { | |
10107 | case RID_CONST: | |
10108 | case RID_VOLATILE: | |
10109 | case RID_RESTRICT: | |
10110 | /* Save the value of the token. */ | |
10111 | cv_qualifier = token->value; | |
10112 | /* Consume the token. */ | |
10113 | cp_lexer_consume_token (parser->lexer); | |
10114 | break; | |
10115 | ||
10116 | default: | |
10117 | break; | |
10118 | } | |
10119 | ||
10120 | return cv_qualifier; | |
10121 | } | |
10122 | ||
10123 | /* Parse a declarator-id. | |
10124 | ||
10125 | declarator-id: | |
10126 | id-expression | |
10127 | :: [opt] nested-name-specifier [opt] type-name | |
10128 | ||
10129 | In the `id-expression' case, the value returned is as for | |
10130 | cp_parser_id_expression if the id-expression was an unqualified-id. | |
10131 | If the id-expression was a qualified-id, then a SCOPE_REF is | |
10132 | returned. The first operand is the scope (either a NAMESPACE_DECL | |
10133 | or TREE_TYPE), but the second is still just a representation of an | |
10134 | unqualified-id. */ | |
10135 | ||
10136 | static tree | |
94edc4ab | 10137 | cp_parser_declarator_id (cp_parser* parser) |
a723baf1 MM |
10138 | { |
10139 | tree id_expression; | |
10140 | ||
10141 | /* The expression must be an id-expression. Assume that qualified | |
10142 | names are the names of types so that: | |
10143 | ||
10144 | template <class T> | |
10145 | int S<T>::R::i = 3; | |
10146 | ||
10147 | will work; we must treat `S<T>::R' as the name of a type. | |
10148 | Similarly, assume that qualified names are templates, where | |
10149 | required, so that: | |
10150 | ||
10151 | template <class T> | |
10152 | int S<T>::R<T>::i = 3; | |
10153 | ||
10154 | will work, too. */ | |
10155 | id_expression = cp_parser_id_expression (parser, | |
10156 | /*template_keyword_p=*/false, | |
10157 | /*check_dependency_p=*/false, | |
f3c2dfc6 MM |
10158 | /*template_p=*/NULL, |
10159 | /*declarator_p=*/true); | |
a723baf1 MM |
10160 | /* If the name was qualified, create a SCOPE_REF to represent |
10161 | that. */ | |
10162 | if (parser->scope) | |
ec20aa6c MM |
10163 | { |
10164 | id_expression = build_nt (SCOPE_REF, parser->scope, id_expression); | |
10165 | parser->scope = NULL_TREE; | |
10166 | } | |
a723baf1 MM |
10167 | |
10168 | return id_expression; | |
10169 | } | |
10170 | ||
10171 | /* Parse a type-id. | |
10172 | ||
10173 | type-id: | |
10174 | type-specifier-seq abstract-declarator [opt] | |
10175 | ||
10176 | Returns the TYPE specified. */ | |
10177 | ||
10178 | static tree | |
94edc4ab | 10179 | cp_parser_type_id (cp_parser* parser) |
a723baf1 MM |
10180 | { |
10181 | tree type_specifier_seq; | |
10182 | tree abstract_declarator; | |
10183 | ||
10184 | /* Parse the type-specifier-seq. */ | |
10185 | type_specifier_seq | |
10186 | = cp_parser_type_specifier_seq (parser); | |
10187 | if (type_specifier_seq == error_mark_node) | |
10188 | return error_mark_node; | |
10189 | ||
10190 | /* There might or might not be an abstract declarator. */ | |
10191 | cp_parser_parse_tentatively (parser); | |
10192 | /* Look for the declarator. */ | |
10193 | abstract_declarator | |
62b8a44e | 10194 | = cp_parser_declarator (parser, CP_PARSER_DECLARATOR_ABSTRACT, NULL); |
a723baf1 MM |
10195 | /* Check to see if there really was a declarator. */ |
10196 | if (!cp_parser_parse_definitely (parser)) | |
10197 | abstract_declarator = NULL_TREE; | |
10198 | ||
10199 | return groktypename (build_tree_list (type_specifier_seq, | |
10200 | abstract_declarator)); | |
10201 | } | |
10202 | ||
10203 | /* Parse a type-specifier-seq. | |
10204 | ||
10205 | type-specifier-seq: | |
10206 | type-specifier type-specifier-seq [opt] | |
10207 | ||
10208 | GNU extension: | |
10209 | ||
10210 | type-specifier-seq: | |
10211 | attributes type-specifier-seq [opt] | |
10212 | ||
10213 | Returns a TREE_LIST. Either the TREE_VALUE of each node is a | |
10214 | type-specifier, or the TREE_PURPOSE is a list of attributes. */ | |
10215 | ||
10216 | static tree | |
94edc4ab | 10217 | cp_parser_type_specifier_seq (cp_parser* parser) |
a723baf1 MM |
10218 | { |
10219 | bool seen_type_specifier = false; | |
10220 | tree type_specifier_seq = NULL_TREE; | |
10221 | ||
10222 | /* Parse the type-specifiers and attributes. */ | |
10223 | while (true) | |
10224 | { | |
10225 | tree type_specifier; | |
10226 | ||
10227 | /* Check for attributes first. */ | |
10228 | if (cp_lexer_next_token_is_keyword (parser->lexer, RID_ATTRIBUTE)) | |
10229 | { | |
10230 | type_specifier_seq = tree_cons (cp_parser_attributes_opt (parser), | |
10231 | NULL_TREE, | |
10232 | type_specifier_seq); | |
10233 | continue; | |
10234 | } | |
10235 | ||
10236 | /* After the first type-specifier, others are optional. */ | |
10237 | if (seen_type_specifier) | |
10238 | cp_parser_parse_tentatively (parser); | |
10239 | /* Look for the type-specifier. */ | |
10240 | type_specifier = cp_parser_type_specifier (parser, | |
10241 | CP_PARSER_FLAGS_NONE, | |
10242 | /*is_friend=*/false, | |
10243 | /*is_declaration=*/false, | |
10244 | NULL, | |
10245 | NULL); | |
10246 | /* If the first type-specifier could not be found, this is not a | |
10247 | type-specifier-seq at all. */ | |
10248 | if (!seen_type_specifier && type_specifier == error_mark_node) | |
10249 | return error_mark_node; | |
10250 | /* If subsequent type-specifiers could not be found, the | |
10251 | type-specifier-seq is complete. */ | |
10252 | else if (seen_type_specifier && !cp_parser_parse_definitely (parser)) | |
10253 | break; | |
10254 | ||
10255 | /* Add the new type-specifier to the list. */ | |
10256 | type_specifier_seq | |
10257 | = tree_cons (NULL_TREE, type_specifier, type_specifier_seq); | |
10258 | seen_type_specifier = true; | |
10259 | } | |
10260 | ||
10261 | /* We built up the list in reverse order. */ | |
10262 | return nreverse (type_specifier_seq); | |
10263 | } | |
10264 | ||
10265 | /* Parse a parameter-declaration-clause. | |
10266 | ||
10267 | parameter-declaration-clause: | |
10268 | parameter-declaration-list [opt] ... [opt] | |
10269 | parameter-declaration-list , ... | |
10270 | ||
10271 | Returns a representation for the parameter declarations. Each node | |
10272 | is a TREE_LIST. (See cp_parser_parameter_declaration for the exact | |
10273 | representation.) If the parameter-declaration-clause ends with an | |
10274 | ellipsis, PARMLIST_ELLIPSIS_P will hold of the first node in the | |
10275 | list. A return value of NULL_TREE indicates a | |
10276 | parameter-declaration-clause consisting only of an ellipsis. */ | |
10277 | ||
10278 | static tree | |
94edc4ab | 10279 | cp_parser_parameter_declaration_clause (cp_parser* parser) |
a723baf1 MM |
10280 | { |
10281 | tree parameters; | |
10282 | cp_token *token; | |
10283 | bool ellipsis_p; | |
10284 | ||
10285 | /* Peek at the next token. */ | |
10286 | token = cp_lexer_peek_token (parser->lexer); | |
10287 | /* Check for trivial parameter-declaration-clauses. */ | |
10288 | if (token->type == CPP_ELLIPSIS) | |
10289 | { | |
10290 | /* Consume the `...' token. */ | |
10291 | cp_lexer_consume_token (parser->lexer); | |
10292 | return NULL_TREE; | |
10293 | } | |
10294 | else if (token->type == CPP_CLOSE_PAREN) | |
10295 | /* There are no parameters. */ | |
c73aecdf DE |
10296 | { |
10297 | #ifndef NO_IMPLICIT_EXTERN_C | |
10298 | if (in_system_header && current_class_type == NULL | |
10299 | && current_lang_name == lang_name_c) | |
10300 | return NULL_TREE; | |
10301 | else | |
10302 | #endif | |
10303 | return void_list_node; | |
10304 | } | |
a723baf1 MM |
10305 | /* Check for `(void)', too, which is a special case. */ |
10306 | else if (token->keyword == RID_VOID | |
10307 | && (cp_lexer_peek_nth_token (parser->lexer, 2)->type | |
10308 | == CPP_CLOSE_PAREN)) | |
10309 | { | |
10310 | /* Consume the `void' token. */ | |
10311 | cp_lexer_consume_token (parser->lexer); | |
10312 | /* There are no parameters. */ | |
10313 | return void_list_node; | |
10314 | } | |
10315 | ||
10316 | /* Parse the parameter-declaration-list. */ | |
10317 | parameters = cp_parser_parameter_declaration_list (parser); | |
10318 | /* If a parse error occurred while parsing the | |
10319 | parameter-declaration-list, then the entire | |
10320 | parameter-declaration-clause is erroneous. */ | |
10321 | if (parameters == error_mark_node) | |
10322 | return error_mark_node; | |
10323 | ||
10324 | /* Peek at the next token. */ | |
10325 | token = cp_lexer_peek_token (parser->lexer); | |
10326 | /* If it's a `,', the clause should terminate with an ellipsis. */ | |
10327 | if (token->type == CPP_COMMA) | |
10328 | { | |
10329 | /* Consume the `,'. */ | |
10330 | cp_lexer_consume_token (parser->lexer); | |
10331 | /* Expect an ellipsis. */ | |
10332 | ellipsis_p | |
10333 | = (cp_parser_require (parser, CPP_ELLIPSIS, "`...'") != NULL); | |
10334 | } | |
10335 | /* It might also be `...' if the optional trailing `,' was | |
10336 | omitted. */ | |
10337 | else if (token->type == CPP_ELLIPSIS) | |
10338 | { | |
10339 | /* Consume the `...' token. */ | |
10340 | cp_lexer_consume_token (parser->lexer); | |
10341 | /* And remember that we saw it. */ | |
10342 | ellipsis_p = true; | |
10343 | } | |
10344 | else | |
10345 | ellipsis_p = false; | |
10346 | ||
10347 | /* Finish the parameter list. */ | |
10348 | return finish_parmlist (parameters, ellipsis_p); | |
10349 | } | |
10350 | ||
10351 | /* Parse a parameter-declaration-list. | |
10352 | ||
10353 | parameter-declaration-list: | |
10354 | parameter-declaration | |
10355 | parameter-declaration-list , parameter-declaration | |
10356 | ||
10357 | Returns a representation of the parameter-declaration-list, as for | |
10358 | cp_parser_parameter_declaration_clause. However, the | |
10359 | `void_list_node' is never appended to the list. */ | |
10360 | ||
10361 | static tree | |
94edc4ab | 10362 | cp_parser_parameter_declaration_list (cp_parser* parser) |
a723baf1 MM |
10363 | { |
10364 | tree parameters = NULL_TREE; | |
10365 | ||
10366 | /* Look for more parameters. */ | |
10367 | while (true) | |
10368 | { | |
10369 | tree parameter; | |
10370 | /* Parse the parameter. */ | |
10371 | parameter | |
ec194454 MM |
10372 | = cp_parser_parameter_declaration (parser, /*template_parm_p=*/false); |
10373 | ||
34cd5ae7 | 10374 | /* If a parse error occurred parsing the parameter declaration, |
a723baf1 MM |
10375 | then the entire parameter-declaration-list is erroneous. */ |
10376 | if (parameter == error_mark_node) | |
10377 | { | |
10378 | parameters = error_mark_node; | |
10379 | break; | |
10380 | } | |
10381 | /* Add the new parameter to the list. */ | |
10382 | TREE_CHAIN (parameter) = parameters; | |
10383 | parameters = parameter; | |
10384 | ||
10385 | /* Peek at the next token. */ | |
10386 | if (cp_lexer_next_token_is (parser->lexer, CPP_CLOSE_PAREN) | |
10387 | || cp_lexer_next_token_is (parser->lexer, CPP_ELLIPSIS)) | |
10388 | /* The parameter-declaration-list is complete. */ | |
10389 | break; | |
10390 | else if (cp_lexer_next_token_is (parser->lexer, CPP_COMMA)) | |
10391 | { | |
10392 | cp_token *token; | |
10393 | ||
10394 | /* Peek at the next token. */ | |
10395 | token = cp_lexer_peek_nth_token (parser->lexer, 2); | |
10396 | /* If it's an ellipsis, then the list is complete. */ | |
10397 | if (token->type == CPP_ELLIPSIS) | |
10398 | break; | |
10399 | /* Otherwise, there must be more parameters. Consume the | |
10400 | `,'. */ | |
10401 | cp_lexer_consume_token (parser->lexer); | |
10402 | } | |
10403 | else | |
10404 | { | |
10405 | cp_parser_error (parser, "expected `,' or `...'"); | |
10406 | break; | |
10407 | } | |
10408 | } | |
10409 | ||
10410 | /* We built up the list in reverse order; straighten it out now. */ | |
10411 | return nreverse (parameters); | |
10412 | } | |
10413 | ||
10414 | /* Parse a parameter declaration. | |
10415 | ||
10416 | parameter-declaration: | |
10417 | decl-specifier-seq declarator | |
10418 | decl-specifier-seq declarator = assignment-expression | |
10419 | decl-specifier-seq abstract-declarator [opt] | |
10420 | decl-specifier-seq abstract-declarator [opt] = assignment-expression | |
10421 | ||
ec194454 MM |
10422 | If TEMPLATE_PARM_P is TRUE, then this parameter-declaration |
10423 | declares a template parameter. (In that case, a non-nested `>' | |
10424 | token encountered during the parsing of the assignment-expression | |
10425 | is not interpreted as a greater-than operator.) | |
a723baf1 MM |
10426 | |
10427 | Returns a TREE_LIST representing the parameter-declaration. The | |
10428 | TREE_VALUE is a representation of the decl-specifier-seq and | |
10429 | declarator. In particular, the TREE_VALUE will be a TREE_LIST | |
10430 | whose TREE_PURPOSE represents the decl-specifier-seq and whose | |
10431 | TREE_VALUE represents the declarator. */ | |
10432 | ||
10433 | static tree | |
ec194454 MM |
10434 | cp_parser_parameter_declaration (cp_parser *parser, |
10435 | bool template_parm_p) | |
a723baf1 | 10436 | { |
560ad596 | 10437 | int declares_class_or_enum; |
ec194454 | 10438 | bool greater_than_is_operator_p; |
a723baf1 MM |
10439 | tree decl_specifiers; |
10440 | tree attributes; | |
10441 | tree declarator; | |
10442 | tree default_argument; | |
10443 | tree parameter; | |
10444 | cp_token *token; | |
10445 | const char *saved_message; | |
10446 | ||
ec194454 MM |
10447 | /* In a template parameter, `>' is not an operator. |
10448 | ||
10449 | [temp.param] | |
10450 | ||
10451 | When parsing a default template-argument for a non-type | |
10452 | template-parameter, the first non-nested `>' is taken as the end | |
10453 | of the template parameter-list rather than a greater-than | |
10454 | operator. */ | |
10455 | greater_than_is_operator_p = !template_parm_p; | |
10456 | ||
a723baf1 MM |
10457 | /* Type definitions may not appear in parameter types. */ |
10458 | saved_message = parser->type_definition_forbidden_message; | |
10459 | parser->type_definition_forbidden_message | |
10460 | = "types may not be defined in parameter types"; | |
10461 | ||
10462 | /* Parse the declaration-specifiers. */ | |
10463 | decl_specifiers | |
10464 | = cp_parser_decl_specifier_seq (parser, | |
10465 | CP_PARSER_FLAGS_NONE, | |
10466 | &attributes, | |
10467 | &declares_class_or_enum); | |
10468 | /* If an error occurred, there's no reason to attempt to parse the | |
10469 | rest of the declaration. */ | |
10470 | if (cp_parser_error_occurred (parser)) | |
10471 | { | |
10472 | parser->type_definition_forbidden_message = saved_message; | |
10473 | return error_mark_node; | |
10474 | } | |
10475 | ||
10476 | /* Peek at the next token. */ | |
10477 | token = cp_lexer_peek_token (parser->lexer); | |
10478 | /* If the next token is a `)', `,', `=', `>', or `...', then there | |
10479 | is no declarator. */ | |
10480 | if (token->type == CPP_CLOSE_PAREN | |
10481 | || token->type == CPP_COMMA | |
10482 | || token->type == CPP_EQ | |
10483 | || token->type == CPP_ELLIPSIS | |
10484 | || token->type == CPP_GREATER) | |
10485 | declarator = NULL_TREE; | |
10486 | /* Otherwise, there should be a declarator. */ | |
10487 | else | |
10488 | { | |
10489 | bool saved_default_arg_ok_p = parser->default_arg_ok_p; | |
10490 | parser->default_arg_ok_p = false; | |
10491 | ||
a723baf1 | 10492 | declarator = cp_parser_declarator (parser, |
62b8a44e | 10493 | CP_PARSER_DECLARATOR_EITHER, |
a723baf1 | 10494 | /*ctor_dtor_or_conv_p=*/NULL); |
a723baf1 | 10495 | parser->default_arg_ok_p = saved_default_arg_ok_p; |
4971227d MM |
10496 | /* After the declarator, allow more attributes. */ |
10497 | attributes = chainon (attributes, cp_parser_attributes_opt (parser)); | |
a723baf1 MM |
10498 | } |
10499 | ||
62b8a44e | 10500 | /* The restriction on defining new types applies only to the type |
a723baf1 MM |
10501 | of the parameter, not to the default argument. */ |
10502 | parser->type_definition_forbidden_message = saved_message; | |
10503 | ||
10504 | /* If the next token is `=', then process a default argument. */ | |
10505 | if (cp_lexer_next_token_is (parser->lexer, CPP_EQ)) | |
10506 | { | |
10507 | bool saved_greater_than_is_operator_p; | |
10508 | /* Consume the `='. */ | |
10509 | cp_lexer_consume_token (parser->lexer); | |
10510 | ||
10511 | /* If we are defining a class, then the tokens that make up the | |
10512 | default argument must be saved and processed later. */ | |
ec194454 MM |
10513 | if (!template_parm_p && at_class_scope_p () |
10514 | && TYPE_BEING_DEFINED (current_class_type)) | |
a723baf1 MM |
10515 | { |
10516 | unsigned depth = 0; | |
10517 | ||
10518 | /* Create a DEFAULT_ARG to represented the unparsed default | |
10519 | argument. */ | |
10520 | default_argument = make_node (DEFAULT_ARG); | |
10521 | DEFARG_TOKENS (default_argument) = cp_token_cache_new (); | |
10522 | ||
10523 | /* Add tokens until we have processed the entire default | |
10524 | argument. */ | |
10525 | while (true) | |
10526 | { | |
10527 | bool done = false; | |
10528 | cp_token *token; | |
10529 | ||
10530 | /* Peek at the next token. */ | |
10531 | token = cp_lexer_peek_token (parser->lexer); | |
10532 | /* What we do depends on what token we have. */ | |
10533 | switch (token->type) | |
10534 | { | |
10535 | /* In valid code, a default argument must be | |
10536 | immediately followed by a `,' `)', or `...'. */ | |
10537 | case CPP_COMMA: | |
10538 | case CPP_CLOSE_PAREN: | |
10539 | case CPP_ELLIPSIS: | |
10540 | /* If we run into a non-nested `;', `}', or `]', | |
10541 | then the code is invalid -- but the default | |
10542 | argument is certainly over. */ | |
10543 | case CPP_SEMICOLON: | |
10544 | case CPP_CLOSE_BRACE: | |
10545 | case CPP_CLOSE_SQUARE: | |
10546 | if (depth == 0) | |
10547 | done = true; | |
10548 | /* Update DEPTH, if necessary. */ | |
10549 | else if (token->type == CPP_CLOSE_PAREN | |
10550 | || token->type == CPP_CLOSE_BRACE | |
10551 | || token->type == CPP_CLOSE_SQUARE) | |
10552 | --depth; | |
10553 | break; | |
10554 | ||
10555 | case CPP_OPEN_PAREN: | |
10556 | case CPP_OPEN_SQUARE: | |
10557 | case CPP_OPEN_BRACE: | |
10558 | ++depth; | |
10559 | break; | |
10560 | ||
10561 | case CPP_GREATER: | |
10562 | /* If we see a non-nested `>', and `>' is not an | |
10563 | operator, then it marks the end of the default | |
10564 | argument. */ | |
10565 | if (!depth && !greater_than_is_operator_p) | |
10566 | done = true; | |
10567 | break; | |
10568 | ||
10569 | /* If we run out of tokens, issue an error message. */ | |
10570 | case CPP_EOF: | |
10571 | error ("file ends in default argument"); | |
10572 | done = true; | |
10573 | break; | |
10574 | ||
10575 | case CPP_NAME: | |
10576 | case CPP_SCOPE: | |
10577 | /* In these cases, we should look for template-ids. | |
10578 | For example, if the default argument is | |
10579 | `X<int, double>()', we need to do name lookup to | |
10580 | figure out whether or not `X' is a template; if | |
34cd5ae7 | 10581 | so, the `,' does not end the default argument. |
a723baf1 MM |
10582 | |
10583 | That is not yet done. */ | |
10584 | break; | |
10585 | ||
10586 | default: | |
10587 | break; | |
10588 | } | |
10589 | ||
10590 | /* If we've reached the end, stop. */ | |
10591 | if (done) | |
10592 | break; | |
10593 | ||
10594 | /* Add the token to the token block. */ | |
10595 | token = cp_lexer_consume_token (parser->lexer); | |
10596 | cp_token_cache_push_token (DEFARG_TOKENS (default_argument), | |
10597 | token); | |
10598 | } | |
10599 | } | |
10600 | /* Outside of a class definition, we can just parse the | |
10601 | assignment-expression. */ | |
10602 | else | |
10603 | { | |
10604 | bool saved_local_variables_forbidden_p; | |
10605 | ||
10606 | /* Make sure that PARSER->GREATER_THAN_IS_OPERATOR_P is | |
10607 | set correctly. */ | |
10608 | saved_greater_than_is_operator_p | |
10609 | = parser->greater_than_is_operator_p; | |
10610 | parser->greater_than_is_operator_p = greater_than_is_operator_p; | |
10611 | /* Local variable names (and the `this' keyword) may not | |
10612 | appear in a default argument. */ | |
10613 | saved_local_variables_forbidden_p | |
10614 | = parser->local_variables_forbidden_p; | |
10615 | parser->local_variables_forbidden_p = true; | |
10616 | /* Parse the assignment-expression. */ | |
10617 | default_argument = cp_parser_assignment_expression (parser); | |
10618 | /* Restore saved state. */ | |
10619 | parser->greater_than_is_operator_p | |
10620 | = saved_greater_than_is_operator_p; | |
10621 | parser->local_variables_forbidden_p | |
10622 | = saved_local_variables_forbidden_p; | |
10623 | } | |
10624 | if (!parser->default_arg_ok_p) | |
10625 | { | |
c67d36d0 NS |
10626 | if (!flag_pedantic_errors) |
10627 | warning ("deprecated use of default argument for parameter of non-function"); | |
10628 | else | |
10629 | { | |
10630 | error ("default arguments are only permitted for function parameters"); | |
10631 | default_argument = NULL_TREE; | |
10632 | } | |
a723baf1 MM |
10633 | } |
10634 | } | |
10635 | else | |
10636 | default_argument = NULL_TREE; | |
10637 | ||
10638 | /* Create the representation of the parameter. */ | |
10639 | if (attributes) | |
10640 | decl_specifiers = tree_cons (attributes, NULL_TREE, decl_specifiers); | |
10641 | parameter = build_tree_list (default_argument, | |
10642 | build_tree_list (decl_specifiers, | |
10643 | declarator)); | |
10644 | ||
10645 | return parameter; | |
10646 | } | |
10647 | ||
10648 | /* Parse a function-definition. | |
10649 | ||
10650 | function-definition: | |
10651 | decl-specifier-seq [opt] declarator ctor-initializer [opt] | |
10652 | function-body | |
10653 | decl-specifier-seq [opt] declarator function-try-block | |
10654 | ||
10655 | GNU Extension: | |
10656 | ||
10657 | function-definition: | |
10658 | __extension__ function-definition | |
10659 | ||
10660 | Returns the FUNCTION_DECL for the function. If FRIEND_P is | |
10661 | non-NULL, *FRIEND_P is set to TRUE iff the function was declared to | |
10662 | be a `friend'. */ | |
10663 | ||
10664 | static tree | |
94edc4ab | 10665 | cp_parser_function_definition (cp_parser* parser, bool* friend_p) |
a723baf1 MM |
10666 | { |
10667 | tree decl_specifiers; | |
10668 | tree attributes; | |
10669 | tree declarator; | |
10670 | tree fn; | |
a723baf1 | 10671 | cp_token *token; |
560ad596 | 10672 | int declares_class_or_enum; |
a723baf1 MM |
10673 | bool member_p; |
10674 | /* The saved value of the PEDANTIC flag. */ | |
10675 | int saved_pedantic; | |
10676 | ||
10677 | /* Any pending qualification must be cleared by our caller. It is | |
10678 | more robust to force the callers to clear PARSER->SCOPE than to | |
10679 | do it here since if the qualification is in effect here, it might | |
10680 | also end up in effect elsewhere that it is not intended. */ | |
10681 | my_friendly_assert (!parser->scope, 20010821); | |
10682 | ||
10683 | /* Handle `__extension__'. */ | |
10684 | if (cp_parser_extension_opt (parser, &saved_pedantic)) | |
10685 | { | |
10686 | /* Parse the function-definition. */ | |
10687 | fn = cp_parser_function_definition (parser, friend_p); | |
10688 | /* Restore the PEDANTIC flag. */ | |
10689 | pedantic = saved_pedantic; | |
10690 | ||
10691 | return fn; | |
10692 | } | |
10693 | ||
10694 | /* Check to see if this definition appears in a class-specifier. */ | |
10695 | member_p = (at_class_scope_p () | |
10696 | && TYPE_BEING_DEFINED (current_class_type)); | |
10697 | /* Defer access checks in the decl-specifier-seq until we know what | |
10698 | function is being defined. There is no need to do this for the | |
10699 | definition of member functions; we cannot be defining a member | |
10700 | from another class. */ | |
8d241e0b | 10701 | push_deferring_access_checks (member_p ? dk_no_check: dk_deferred); |
cf22909c | 10702 | |
a723baf1 MM |
10703 | /* Parse the decl-specifier-seq. */ |
10704 | decl_specifiers | |
10705 | = cp_parser_decl_specifier_seq (parser, | |
10706 | CP_PARSER_FLAGS_OPTIONAL, | |
10707 | &attributes, | |
10708 | &declares_class_or_enum); | |
10709 | /* Figure out whether this declaration is a `friend'. */ | |
10710 | if (friend_p) | |
10711 | *friend_p = cp_parser_friend_p (decl_specifiers); | |
10712 | ||
10713 | /* Parse the declarator. */ | |
62b8a44e | 10714 | declarator = cp_parser_declarator (parser, CP_PARSER_DECLARATOR_NAMED, |
a723baf1 MM |
10715 | /*ctor_dtor_or_conv_p=*/NULL); |
10716 | ||
10717 | /* Gather up any access checks that occurred. */ | |
cf22909c | 10718 | stop_deferring_access_checks (); |
a723baf1 MM |
10719 | |
10720 | /* If something has already gone wrong, we may as well stop now. */ | |
10721 | if (declarator == error_mark_node) | |
10722 | { | |
10723 | /* Skip to the end of the function, or if this wasn't anything | |
10724 | like a function-definition, to a `;' in the hopes of finding | |
10725 | a sensible place from which to continue parsing. */ | |
10726 | cp_parser_skip_to_end_of_block_or_statement (parser); | |
cf22909c | 10727 | pop_deferring_access_checks (); |
a723baf1 MM |
10728 | return error_mark_node; |
10729 | } | |
10730 | ||
10731 | /* The next character should be a `{' (for a simple function | |
10732 | definition), a `:' (for a ctor-initializer), or `try' (for a | |
10733 | function-try block). */ | |
10734 | token = cp_lexer_peek_token (parser->lexer); | |
10735 | if (!cp_parser_token_starts_function_definition_p (token)) | |
10736 | { | |
10737 | /* Issue the error-message. */ | |
10738 | cp_parser_error (parser, "expected function-definition"); | |
10739 | /* Skip to the next `;'. */ | |
10740 | cp_parser_skip_to_end_of_block_or_statement (parser); | |
10741 | ||
cf22909c | 10742 | pop_deferring_access_checks (); |
a723baf1 MM |
10743 | return error_mark_node; |
10744 | } | |
10745 | ||
560ad596 MM |
10746 | cp_parser_check_for_definition_in_return_type (declarator, |
10747 | declares_class_or_enum); | |
10748 | ||
a723baf1 MM |
10749 | /* If we are in a class scope, then we must handle |
10750 | function-definitions specially. In particular, we save away the | |
10751 | tokens that make up the function body, and parse them again | |
10752 | later, in order to handle code like: | |
10753 | ||
10754 | struct S { | |
10755 | int f () { return i; } | |
10756 | int i; | |
10757 | }; | |
10758 | ||
10759 | Here, we cannot parse the body of `f' until after we have seen | |
10760 | the declaration of `i'. */ | |
10761 | if (member_p) | |
10762 | { | |
10763 | cp_token_cache *cache; | |
10764 | ||
10765 | /* Create the function-declaration. */ | |
10766 | fn = start_method (decl_specifiers, declarator, attributes); | |
10767 | /* If something went badly wrong, bail out now. */ | |
10768 | if (fn == error_mark_node) | |
10769 | { | |
10770 | /* If there's a function-body, skip it. */ | |
10771 | if (cp_parser_token_starts_function_definition_p | |
10772 | (cp_lexer_peek_token (parser->lexer))) | |
10773 | cp_parser_skip_to_end_of_block_or_statement (parser); | |
cf22909c | 10774 | pop_deferring_access_checks (); |
a723baf1 MM |
10775 | return error_mark_node; |
10776 | } | |
10777 | ||
8db1028e NS |
10778 | /* Remember it, if there default args to post process. */ |
10779 | cp_parser_save_default_args (parser, fn); | |
10780 | ||
a723baf1 MM |
10781 | /* Create a token cache. */ |
10782 | cache = cp_token_cache_new (); | |
10783 | /* Save away the tokens that make up the body of the | |
10784 | function. */ | |
10785 | cp_parser_cache_group (parser, cache, CPP_CLOSE_BRACE, /*depth=*/0); | |
10786 | /* Handle function try blocks. */ | |
10787 | while (cp_lexer_next_token_is_keyword (parser->lexer, RID_CATCH)) | |
10788 | cp_parser_cache_group (parser, cache, CPP_CLOSE_BRACE, /*depth=*/0); | |
10789 | ||
10790 | /* Save away the inline definition; we will process it when the | |
10791 | class is complete. */ | |
10792 | DECL_PENDING_INLINE_INFO (fn) = cache; | |
10793 | DECL_PENDING_INLINE_P (fn) = 1; | |
10794 | ||
649fc72d NS |
10795 | /* We need to know that this was defined in the class, so that |
10796 | friend templates are handled correctly. */ | |
10797 | DECL_INITIALIZED_IN_CLASS_P (fn) = 1; | |
10798 | ||
a723baf1 MM |
10799 | /* We're done with the inline definition. */ |
10800 | finish_method (fn); | |
10801 | ||
10802 | /* Add FN to the queue of functions to be parsed later. */ | |
10803 | TREE_VALUE (parser->unparsed_functions_queues) | |
8218bd34 | 10804 | = tree_cons (NULL_TREE, fn, |
a723baf1 MM |
10805 | TREE_VALUE (parser->unparsed_functions_queues)); |
10806 | ||
cf22909c | 10807 | pop_deferring_access_checks (); |
a723baf1 MM |
10808 | return fn; |
10809 | } | |
10810 | ||
10811 | /* Check that the number of template-parameter-lists is OK. */ | |
10812 | if (!cp_parser_check_declarator_template_parameters (parser, | |
10813 | declarator)) | |
10814 | { | |
10815 | cp_parser_skip_to_end_of_block_or_statement (parser); | |
cf22909c | 10816 | pop_deferring_access_checks (); |
a723baf1 MM |
10817 | return error_mark_node; |
10818 | } | |
10819 | ||
cf22909c KL |
10820 | fn = cp_parser_function_definition_from_specifiers_and_declarator |
10821 | (parser, decl_specifiers, attributes, declarator); | |
10822 | pop_deferring_access_checks (); | |
10823 | return fn; | |
a723baf1 MM |
10824 | } |
10825 | ||
10826 | /* Parse a function-body. | |
10827 | ||
10828 | function-body: | |
10829 | compound_statement */ | |
10830 | ||
10831 | static void | |
10832 | cp_parser_function_body (cp_parser *parser) | |
10833 | { | |
a5bcc582 | 10834 | cp_parser_compound_statement (parser, false); |
a723baf1 MM |
10835 | } |
10836 | ||
10837 | /* Parse a ctor-initializer-opt followed by a function-body. Return | |
10838 | true if a ctor-initializer was present. */ | |
10839 | ||
10840 | static bool | |
10841 | cp_parser_ctor_initializer_opt_and_function_body (cp_parser *parser) | |
10842 | { | |
10843 | tree body; | |
10844 | bool ctor_initializer_p; | |
10845 | ||
10846 | /* Begin the function body. */ | |
10847 | body = begin_function_body (); | |
10848 | /* Parse the optional ctor-initializer. */ | |
10849 | ctor_initializer_p = cp_parser_ctor_initializer_opt (parser); | |
10850 | /* Parse the function-body. */ | |
10851 | cp_parser_function_body (parser); | |
10852 | /* Finish the function body. */ | |
10853 | finish_function_body (body); | |
10854 | ||
10855 | return ctor_initializer_p; | |
10856 | } | |
10857 | ||
10858 | /* Parse an initializer. | |
10859 | ||
10860 | initializer: | |
10861 | = initializer-clause | |
10862 | ( expression-list ) | |
10863 | ||
10864 | Returns a expression representing the initializer. If no | |
10865 | initializer is present, NULL_TREE is returned. | |
10866 | ||
10867 | *IS_PARENTHESIZED_INIT is set to TRUE if the `( expression-list )' | |
10868 | production is used, and zero otherwise. *IS_PARENTHESIZED_INIT is | |
39703eb9 MM |
10869 | set to FALSE if there is no initializer present. If there is an |
10870 | initializer, and it is not a constant-expression, *NON_CONSTANT_P | |
10871 | is set to true; otherwise it is set to false. */ | |
a723baf1 MM |
10872 | |
10873 | static tree | |
39703eb9 MM |
10874 | cp_parser_initializer (cp_parser* parser, bool* is_parenthesized_init, |
10875 | bool* non_constant_p) | |
a723baf1 MM |
10876 | { |
10877 | cp_token *token; | |
10878 | tree init; | |
10879 | ||
10880 | /* Peek at the next token. */ | |
10881 | token = cp_lexer_peek_token (parser->lexer); | |
10882 | ||
10883 | /* Let our caller know whether or not this initializer was | |
10884 | parenthesized. */ | |
10885 | *is_parenthesized_init = (token->type == CPP_OPEN_PAREN); | |
39703eb9 MM |
10886 | /* Assume that the initializer is constant. */ |
10887 | *non_constant_p = false; | |
a723baf1 MM |
10888 | |
10889 | if (token->type == CPP_EQ) | |
10890 | { | |
10891 | /* Consume the `='. */ | |
10892 | cp_lexer_consume_token (parser->lexer); | |
10893 | /* Parse the initializer-clause. */ | |
39703eb9 | 10894 | init = cp_parser_initializer_clause (parser, non_constant_p); |
a723baf1 MM |
10895 | } |
10896 | else if (token->type == CPP_OPEN_PAREN) | |
39703eb9 MM |
10897 | init = cp_parser_parenthesized_expression_list (parser, false, |
10898 | non_constant_p); | |
a723baf1 MM |
10899 | else |
10900 | { | |
10901 | /* Anything else is an error. */ | |
10902 | cp_parser_error (parser, "expected initializer"); | |
10903 | init = error_mark_node; | |
10904 | } | |
10905 | ||
10906 | return init; | |
10907 | } | |
10908 | ||
10909 | /* Parse an initializer-clause. | |
10910 | ||
10911 | initializer-clause: | |
10912 | assignment-expression | |
10913 | { initializer-list , [opt] } | |
10914 | { } | |
10915 | ||
10916 | Returns an expression representing the initializer. | |
10917 | ||
10918 | If the `assignment-expression' production is used the value | |
34cd5ae7 | 10919 | returned is simply a representation for the expression. |
a723baf1 MM |
10920 | |
10921 | Otherwise, a CONSTRUCTOR is returned. The CONSTRUCTOR_ELTS will be | |
10922 | the elements of the initializer-list (or NULL_TREE, if the last | |
10923 | production is used). The TREE_TYPE for the CONSTRUCTOR will be | |
10924 | NULL_TREE. There is no way to detect whether or not the optional | |
39703eb9 MM |
10925 | trailing `,' was provided. NON_CONSTANT_P is as for |
10926 | cp_parser_initializer. */ | |
a723baf1 MM |
10927 | |
10928 | static tree | |
39703eb9 | 10929 | cp_parser_initializer_clause (cp_parser* parser, bool* non_constant_p) |
a723baf1 MM |
10930 | { |
10931 | tree initializer; | |
10932 | ||
10933 | /* If it is not a `{', then we are looking at an | |
10934 | assignment-expression. */ | |
10935 | if (cp_lexer_next_token_is_not (parser->lexer, CPP_OPEN_BRACE)) | |
39703eb9 MM |
10936 | initializer |
10937 | = cp_parser_constant_expression (parser, | |
10938 | /*allow_non_constant_p=*/true, | |
10939 | non_constant_p); | |
a723baf1 MM |
10940 | else |
10941 | { | |
10942 | /* Consume the `{' token. */ | |
10943 | cp_lexer_consume_token (parser->lexer); | |
10944 | /* Create a CONSTRUCTOR to represent the braced-initializer. */ | |
10945 | initializer = make_node (CONSTRUCTOR); | |
10946 | /* Mark it with TREE_HAS_CONSTRUCTOR. This should not be | |
10947 | necessary, but check_initializer depends upon it, for | |
10948 | now. */ | |
10949 | TREE_HAS_CONSTRUCTOR (initializer) = 1; | |
10950 | /* If it's not a `}', then there is a non-trivial initializer. */ | |
10951 | if (cp_lexer_next_token_is_not (parser->lexer, CPP_CLOSE_BRACE)) | |
10952 | { | |
10953 | /* Parse the initializer list. */ | |
10954 | CONSTRUCTOR_ELTS (initializer) | |
39703eb9 | 10955 | = cp_parser_initializer_list (parser, non_constant_p); |
a723baf1 MM |
10956 | /* A trailing `,' token is allowed. */ |
10957 | if (cp_lexer_next_token_is (parser->lexer, CPP_COMMA)) | |
10958 | cp_lexer_consume_token (parser->lexer); | |
10959 | } | |
a723baf1 MM |
10960 | /* Now, there should be a trailing `}'. */ |
10961 | cp_parser_require (parser, CPP_CLOSE_BRACE, "`}'"); | |
10962 | } | |
10963 | ||
10964 | return initializer; | |
10965 | } | |
10966 | ||
10967 | /* Parse an initializer-list. | |
10968 | ||
10969 | initializer-list: | |
10970 | initializer-clause | |
10971 | initializer-list , initializer-clause | |
10972 | ||
10973 | GNU Extension: | |
10974 | ||
10975 | initializer-list: | |
10976 | identifier : initializer-clause | |
10977 | initializer-list, identifier : initializer-clause | |
10978 | ||
10979 | Returns a TREE_LIST. The TREE_VALUE of each node is an expression | |
10980 | for the initializer. If the TREE_PURPOSE is non-NULL, it is the | |
39703eb9 MM |
10981 | IDENTIFIER_NODE naming the field to initialize. NON_CONSTANT_P is |
10982 | as for cp_parser_initializer. */ | |
a723baf1 MM |
10983 | |
10984 | static tree | |
39703eb9 | 10985 | cp_parser_initializer_list (cp_parser* parser, bool* non_constant_p) |
a723baf1 MM |
10986 | { |
10987 | tree initializers = NULL_TREE; | |
10988 | ||
39703eb9 MM |
10989 | /* Assume all of the expressions are constant. */ |
10990 | *non_constant_p = false; | |
10991 | ||
a723baf1 MM |
10992 | /* Parse the rest of the list. */ |
10993 | while (true) | |
10994 | { | |
10995 | cp_token *token; | |
10996 | tree identifier; | |
10997 | tree initializer; | |
39703eb9 MM |
10998 | bool clause_non_constant_p; |
10999 | ||
a723baf1 MM |
11000 | /* If the next token is an identifier and the following one is a |
11001 | colon, we are looking at the GNU designated-initializer | |
11002 | syntax. */ | |
11003 | if (cp_parser_allow_gnu_extensions_p (parser) | |
11004 | && cp_lexer_next_token_is (parser->lexer, CPP_NAME) | |
11005 | && cp_lexer_peek_nth_token (parser->lexer, 2)->type == CPP_COLON) | |
11006 | { | |
11007 | /* Consume the identifier. */ | |
11008 | identifier = cp_lexer_consume_token (parser->lexer)->value; | |
11009 | /* Consume the `:'. */ | |
11010 | cp_lexer_consume_token (parser->lexer); | |
11011 | } | |
11012 | else | |
11013 | identifier = NULL_TREE; | |
11014 | ||
11015 | /* Parse the initializer. */ | |
39703eb9 MM |
11016 | initializer = cp_parser_initializer_clause (parser, |
11017 | &clause_non_constant_p); | |
11018 | /* If any clause is non-constant, so is the entire initializer. */ | |
11019 | if (clause_non_constant_p) | |
11020 | *non_constant_p = true; | |
a723baf1 MM |
11021 | /* Add it to the list. */ |
11022 | initializers = tree_cons (identifier, initializer, initializers); | |
11023 | ||
11024 | /* If the next token is not a comma, we have reached the end of | |
11025 | the list. */ | |
11026 | if (cp_lexer_next_token_is_not (parser->lexer, CPP_COMMA)) | |
11027 | break; | |
11028 | ||
11029 | /* Peek at the next token. */ | |
11030 | token = cp_lexer_peek_nth_token (parser->lexer, 2); | |
11031 | /* If the next token is a `}', then we're still done. An | |
11032 | initializer-clause can have a trailing `,' after the | |
11033 | initializer-list and before the closing `}'. */ | |
11034 | if (token->type == CPP_CLOSE_BRACE) | |
11035 | break; | |
11036 | ||
11037 | /* Consume the `,' token. */ | |
11038 | cp_lexer_consume_token (parser->lexer); | |
11039 | } | |
11040 | ||
11041 | /* The initializers were built up in reverse order, so we need to | |
11042 | reverse them now. */ | |
11043 | return nreverse (initializers); | |
11044 | } | |
11045 | ||
11046 | /* Classes [gram.class] */ | |
11047 | ||
11048 | /* Parse a class-name. | |
11049 | ||
11050 | class-name: | |
11051 | identifier | |
11052 | template-id | |
11053 | ||
11054 | TYPENAME_KEYWORD_P is true iff the `typename' keyword has been used | |
11055 | to indicate that names looked up in dependent types should be | |
11056 | assumed to be types. TEMPLATE_KEYWORD_P is true iff the `template' | |
11057 | keyword has been used to indicate that the name that appears next | |
11058 | is a template. TYPE_P is true iff the next name should be treated | |
11059 | as class-name, even if it is declared to be some other kind of name | |
8d241e0b KL |
11060 | as well. If CHECK_DEPENDENCY_P is FALSE, names are looked up in |
11061 | dependent scopes. If CLASS_HEAD_P is TRUE, this class is the class | |
11062 | being defined in a class-head. | |
a723baf1 MM |
11063 | |
11064 | Returns the TYPE_DECL representing the class. */ | |
11065 | ||
11066 | static tree | |
11067 | cp_parser_class_name (cp_parser *parser, | |
11068 | bool typename_keyword_p, | |
11069 | bool template_keyword_p, | |
11070 | bool type_p, | |
a723baf1 MM |
11071 | bool check_dependency_p, |
11072 | bool class_head_p) | |
11073 | { | |
11074 | tree decl; | |
11075 | tree scope; | |
11076 | bool typename_p; | |
e5976695 MM |
11077 | cp_token *token; |
11078 | ||
11079 | /* All class-names start with an identifier. */ | |
11080 | token = cp_lexer_peek_token (parser->lexer); | |
11081 | if (token->type != CPP_NAME && token->type != CPP_TEMPLATE_ID) | |
11082 | { | |
11083 | cp_parser_error (parser, "expected class-name"); | |
11084 | return error_mark_node; | |
11085 | } | |
11086 | ||
a723baf1 MM |
11087 | /* PARSER->SCOPE can be cleared when parsing the template-arguments |
11088 | to a template-id, so we save it here. */ | |
11089 | scope = parser->scope; | |
3adee96c KL |
11090 | if (scope == error_mark_node) |
11091 | return error_mark_node; | |
11092 | ||
a723baf1 MM |
11093 | /* Any name names a type if we're following the `typename' keyword |
11094 | in a qualified name where the enclosing scope is type-dependent. */ | |
11095 | typename_p = (typename_keyword_p && scope && TYPE_P (scope) | |
1fb3244a | 11096 | && dependent_type_p (scope)); |
e5976695 MM |
11097 | /* Handle the common case (an identifier, but not a template-id) |
11098 | efficiently. */ | |
11099 | if (token->type == CPP_NAME | |
11100 | && cp_lexer_peek_nth_token (parser->lexer, 2)->type != CPP_LESS) | |
a723baf1 | 11101 | { |
a723baf1 MM |
11102 | tree identifier; |
11103 | ||
11104 | /* Look for the identifier. */ | |
11105 | identifier = cp_parser_identifier (parser); | |
11106 | /* If the next token isn't an identifier, we are certainly not | |
11107 | looking at a class-name. */ | |
11108 | if (identifier == error_mark_node) | |
11109 | decl = error_mark_node; | |
11110 | /* If we know this is a type-name, there's no need to look it | |
11111 | up. */ | |
11112 | else if (typename_p) | |
11113 | decl = identifier; | |
11114 | else | |
11115 | { | |
11116 | /* If the next token is a `::', then the name must be a type | |
11117 | name. | |
11118 | ||
11119 | [basic.lookup.qual] | |
11120 | ||
11121 | During the lookup for a name preceding the :: scope | |
11122 | resolution operator, object, function, and enumerator | |
11123 | names are ignored. */ | |
11124 | if (cp_lexer_next_token_is (parser->lexer, CPP_SCOPE)) | |
11125 | type_p = true; | |
11126 | /* Look up the name. */ | |
11127 | decl = cp_parser_lookup_name (parser, identifier, | |
a723baf1 | 11128 | type_p, |
eea9800f | 11129 | /*is_namespace=*/false, |
a723baf1 MM |
11130 | check_dependency_p); |
11131 | } | |
11132 | } | |
e5976695 MM |
11133 | else |
11134 | { | |
11135 | /* Try a template-id. */ | |
11136 | decl = cp_parser_template_id (parser, template_keyword_p, | |
11137 | check_dependency_p); | |
11138 | if (decl == error_mark_node) | |
11139 | return error_mark_node; | |
11140 | } | |
a723baf1 MM |
11141 | |
11142 | decl = cp_parser_maybe_treat_template_as_class (decl, class_head_p); | |
11143 | ||
11144 | /* If this is a typename, create a TYPENAME_TYPE. */ | |
11145 | if (typename_p && decl != error_mark_node) | |
11146 | decl = TYPE_NAME (make_typename_type (scope, decl, | |
11147 | /*complain=*/1)); | |
11148 | ||
11149 | /* Check to see that it is really the name of a class. */ | |
11150 | if (TREE_CODE (decl) == TEMPLATE_ID_EXPR | |
11151 | && TREE_CODE (TREE_OPERAND (decl, 0)) == IDENTIFIER_NODE | |
11152 | && cp_lexer_next_token_is (parser->lexer, CPP_SCOPE)) | |
11153 | /* Situations like this: | |
11154 | ||
11155 | template <typename T> struct A { | |
11156 | typename T::template X<int>::I i; | |
11157 | }; | |
11158 | ||
11159 | are problematic. Is `T::template X<int>' a class-name? The | |
11160 | standard does not seem to be definitive, but there is no other | |
11161 | valid interpretation of the following `::'. Therefore, those | |
11162 | names are considered class-names. */ | |
78757caa | 11163 | decl = TYPE_NAME (make_typename_type (scope, decl, tf_error)); |
a723baf1 MM |
11164 | else if (decl == error_mark_node |
11165 | || TREE_CODE (decl) != TYPE_DECL | |
11166 | || !IS_AGGR_TYPE (TREE_TYPE (decl))) | |
11167 | { | |
11168 | cp_parser_error (parser, "expected class-name"); | |
11169 | return error_mark_node; | |
11170 | } | |
11171 | ||
11172 | return decl; | |
11173 | } | |
11174 | ||
11175 | /* Parse a class-specifier. | |
11176 | ||
11177 | class-specifier: | |
11178 | class-head { member-specification [opt] } | |
11179 | ||
11180 | Returns the TREE_TYPE representing the class. */ | |
11181 | ||
11182 | static tree | |
94edc4ab | 11183 | cp_parser_class_specifier (cp_parser* parser) |
a723baf1 MM |
11184 | { |
11185 | cp_token *token; | |
11186 | tree type; | |
11187 | tree attributes = NULL_TREE; | |
11188 | int has_trailing_semicolon; | |
11189 | bool nested_name_specifier_p; | |
a723baf1 MM |
11190 | unsigned saved_num_template_parameter_lists; |
11191 | ||
8d241e0b | 11192 | push_deferring_access_checks (dk_no_deferred); |
cf22909c | 11193 | |
a723baf1 MM |
11194 | /* Parse the class-head. */ |
11195 | type = cp_parser_class_head (parser, | |
cf22909c | 11196 | &nested_name_specifier_p); |
a723baf1 MM |
11197 | /* If the class-head was a semantic disaster, skip the entire body |
11198 | of the class. */ | |
11199 | if (!type) | |
11200 | { | |
11201 | cp_parser_skip_to_end_of_block_or_statement (parser); | |
cf22909c | 11202 | pop_deferring_access_checks (); |
a723baf1 MM |
11203 | return error_mark_node; |
11204 | } | |
cf22909c | 11205 | |
a723baf1 MM |
11206 | /* Look for the `{'. */ |
11207 | if (!cp_parser_require (parser, CPP_OPEN_BRACE, "`{'")) | |
cf22909c KL |
11208 | { |
11209 | pop_deferring_access_checks (); | |
11210 | return error_mark_node; | |
11211 | } | |
11212 | ||
a723baf1 MM |
11213 | /* Issue an error message if type-definitions are forbidden here. */ |
11214 | cp_parser_check_type_definition (parser); | |
11215 | /* Remember that we are defining one more class. */ | |
11216 | ++parser->num_classes_being_defined; | |
11217 | /* Inside the class, surrounding template-parameter-lists do not | |
11218 | apply. */ | |
11219 | saved_num_template_parameter_lists | |
11220 | = parser->num_template_parameter_lists; | |
11221 | parser->num_template_parameter_lists = 0; | |
78757caa | 11222 | |
a723baf1 MM |
11223 | /* Start the class. */ |
11224 | type = begin_class_definition (type); | |
11225 | if (type == error_mark_node) | |
9bcb9aae | 11226 | /* If the type is erroneous, skip the entire body of the class. */ |
a723baf1 MM |
11227 | cp_parser_skip_to_closing_brace (parser); |
11228 | else | |
11229 | /* Parse the member-specification. */ | |
11230 | cp_parser_member_specification_opt (parser); | |
11231 | /* Look for the trailing `}'. */ | |
11232 | cp_parser_require (parser, CPP_CLOSE_BRACE, "`}'"); | |
11233 | /* We get better error messages by noticing a common problem: a | |
11234 | missing trailing `;'. */ | |
11235 | token = cp_lexer_peek_token (parser->lexer); | |
11236 | has_trailing_semicolon = (token->type == CPP_SEMICOLON); | |
11237 | /* Look for attributes to apply to this class. */ | |
11238 | if (cp_parser_allow_gnu_extensions_p (parser)) | |
11239 | attributes = cp_parser_attributes_opt (parser); | |
560ad596 MM |
11240 | /* If we got any attributes in class_head, xref_tag will stick them in |
11241 | TREE_TYPE of the type. Grab them now. */ | |
11242 | if (type != error_mark_node) | |
11243 | { | |
11244 | attributes = chainon (TYPE_ATTRIBUTES (type), attributes); | |
11245 | TYPE_ATTRIBUTES (type) = NULL_TREE; | |
11246 | type = finish_struct (type, attributes); | |
11247 | } | |
11248 | if (nested_name_specifier_p) | |
11249 | pop_scope (CP_DECL_CONTEXT (TYPE_MAIN_DECL (type))); | |
a723baf1 MM |
11250 | /* If this class is not itself within the scope of another class, |
11251 | then we need to parse the bodies of all of the queued function | |
11252 | definitions. Note that the queued functions defined in a class | |
11253 | are not always processed immediately following the | |
11254 | class-specifier for that class. Consider: | |
11255 | ||
11256 | struct A { | |
11257 | struct B { void f() { sizeof (A); } }; | |
11258 | }; | |
11259 | ||
11260 | If `f' were processed before the processing of `A' were | |
11261 | completed, there would be no way to compute the size of `A'. | |
11262 | Note that the nesting we are interested in here is lexical -- | |
11263 | not the semantic nesting given by TYPE_CONTEXT. In particular, | |
11264 | for: | |
11265 | ||
11266 | struct A { struct B; }; | |
11267 | struct A::B { void f() { } }; | |
11268 | ||
11269 | there is no need to delay the parsing of `A::B::f'. */ | |
11270 | if (--parser->num_classes_being_defined == 0) | |
11271 | { | |
8218bd34 MM |
11272 | tree queue_entry; |
11273 | tree fn; | |
a723baf1 | 11274 | |
8218bd34 MM |
11275 | /* In a first pass, parse default arguments to the functions. |
11276 | Then, in a second pass, parse the bodies of the functions. | |
11277 | This two-phased approach handles cases like: | |
11278 | ||
11279 | struct S { | |
11280 | void f() { g(); } | |
11281 | void g(int i = 3); | |
11282 | }; | |
11283 | ||
11284 | */ | |
8db1028e NS |
11285 | for (TREE_PURPOSE (parser->unparsed_functions_queues) |
11286 | = nreverse (TREE_PURPOSE (parser->unparsed_functions_queues)); | |
11287 | (queue_entry = TREE_PURPOSE (parser->unparsed_functions_queues)); | |
11288 | TREE_PURPOSE (parser->unparsed_functions_queues) | |
11289 | = TREE_CHAIN (TREE_PURPOSE (parser->unparsed_functions_queues))) | |
8218bd34 MM |
11290 | { |
11291 | fn = TREE_VALUE (queue_entry); | |
8218bd34 MM |
11292 | /* Make sure that any template parameters are in scope. */ |
11293 | maybe_begin_member_template_processing (fn); | |
11294 | /* If there are default arguments that have not yet been processed, | |
11295 | take care of them now. */ | |
11296 | cp_parser_late_parsing_default_args (parser, fn); | |
11297 | /* Remove any template parameters from the symbol table. */ | |
11298 | maybe_end_member_template_processing (); | |
11299 | } | |
11300 | /* Now parse the body of the functions. */ | |
8db1028e NS |
11301 | for (TREE_VALUE (parser->unparsed_functions_queues) |
11302 | = nreverse (TREE_VALUE (parser->unparsed_functions_queues)); | |
11303 | (queue_entry = TREE_VALUE (parser->unparsed_functions_queues)); | |
11304 | TREE_VALUE (parser->unparsed_functions_queues) | |
11305 | = TREE_CHAIN (TREE_VALUE (parser->unparsed_functions_queues))) | |
a723baf1 | 11306 | { |
a723baf1 | 11307 | /* Figure out which function we need to process. */ |
a723baf1 MM |
11308 | fn = TREE_VALUE (queue_entry); |
11309 | ||
11310 | /* Parse the function. */ | |
11311 | cp_parser_late_parsing_for_member (parser, fn); | |
a723baf1 MM |
11312 | } |
11313 | ||
a723baf1 MM |
11314 | } |
11315 | ||
11316 | /* Put back any saved access checks. */ | |
cf22909c | 11317 | pop_deferring_access_checks (); |
a723baf1 MM |
11318 | |
11319 | /* Restore the count of active template-parameter-lists. */ | |
11320 | parser->num_template_parameter_lists | |
11321 | = saved_num_template_parameter_lists; | |
11322 | ||
11323 | return type; | |
11324 | } | |
11325 | ||
11326 | /* Parse a class-head. | |
11327 | ||
11328 | class-head: | |
11329 | class-key identifier [opt] base-clause [opt] | |
11330 | class-key nested-name-specifier identifier base-clause [opt] | |
11331 | class-key nested-name-specifier [opt] template-id | |
11332 | base-clause [opt] | |
11333 | ||
11334 | GNU Extensions: | |
11335 | class-key attributes identifier [opt] base-clause [opt] | |
11336 | class-key attributes nested-name-specifier identifier base-clause [opt] | |
11337 | class-key attributes nested-name-specifier [opt] template-id | |
11338 | base-clause [opt] | |
11339 | ||
11340 | Returns the TYPE of the indicated class. Sets | |
11341 | *NESTED_NAME_SPECIFIER_P to TRUE iff one of the productions | |
11342 | involving a nested-name-specifier was used, and FALSE otherwise. | |
a723baf1 MM |
11343 | |
11344 | Returns NULL_TREE if the class-head is syntactically valid, but | |
11345 | semantically invalid in a way that means we should skip the entire | |
11346 | body of the class. */ | |
11347 | ||
11348 | static tree | |
94edc4ab NN |
11349 | cp_parser_class_head (cp_parser* parser, |
11350 | bool* nested_name_specifier_p) | |
a723baf1 MM |
11351 | { |
11352 | cp_token *token; | |
11353 | tree nested_name_specifier; | |
11354 | enum tag_types class_key; | |
11355 | tree id = NULL_TREE; | |
11356 | tree type = NULL_TREE; | |
11357 | tree attributes; | |
11358 | bool template_id_p = false; | |
11359 | bool qualified_p = false; | |
11360 | bool invalid_nested_name_p = false; | |
11361 | unsigned num_templates; | |
11362 | ||
11363 | /* Assume no nested-name-specifier will be present. */ | |
11364 | *nested_name_specifier_p = false; | |
11365 | /* Assume no template parameter lists will be used in defining the | |
11366 | type. */ | |
11367 | num_templates = 0; | |
11368 | ||
11369 | /* Look for the class-key. */ | |
11370 | class_key = cp_parser_class_key (parser); | |
11371 | if (class_key == none_type) | |
11372 | return error_mark_node; | |
11373 | ||
11374 | /* Parse the attributes. */ | |
11375 | attributes = cp_parser_attributes_opt (parser); | |
11376 | ||
11377 | /* If the next token is `::', that is invalid -- but sometimes | |
11378 | people do try to write: | |
11379 | ||
11380 | struct ::S {}; | |
11381 | ||
11382 | Handle this gracefully by accepting the extra qualifier, and then | |
11383 | issuing an error about it later if this really is a | |
2050a1bb | 11384 | class-head. If it turns out just to be an elaborated type |
a723baf1 MM |
11385 | specifier, remain silent. */ |
11386 | if (cp_parser_global_scope_opt (parser, /*current_scope_valid_p=*/false)) | |
11387 | qualified_p = true; | |
11388 | ||
8d241e0b KL |
11389 | push_deferring_access_checks (dk_no_check); |
11390 | ||
a723baf1 MM |
11391 | /* Determine the name of the class. Begin by looking for an |
11392 | optional nested-name-specifier. */ | |
11393 | nested_name_specifier | |
11394 | = cp_parser_nested_name_specifier_opt (parser, | |
11395 | /*typename_keyword_p=*/false, | |
66d418e6 | 11396 | /*check_dependency_p=*/false, |
a723baf1 MM |
11397 | /*type_p=*/false); |
11398 | /* If there was a nested-name-specifier, then there *must* be an | |
11399 | identifier. */ | |
11400 | if (nested_name_specifier) | |
11401 | { | |
11402 | /* Although the grammar says `identifier', it really means | |
11403 | `class-name' or `template-name'. You are only allowed to | |
11404 | define a class that has already been declared with this | |
11405 | syntax. | |
11406 | ||
11407 | The proposed resolution for Core Issue 180 says that whever | |
11408 | you see `class T::X' you should treat `X' as a type-name. | |
11409 | ||
11410 | It is OK to define an inaccessible class; for example: | |
11411 | ||
11412 | class A { class B; }; | |
11413 | class A::B {}; | |
11414 | ||
a723baf1 MM |
11415 | We do not know if we will see a class-name, or a |
11416 | template-name. We look for a class-name first, in case the | |
11417 | class-name is a template-id; if we looked for the | |
11418 | template-name first we would stop after the template-name. */ | |
11419 | cp_parser_parse_tentatively (parser); | |
11420 | type = cp_parser_class_name (parser, | |
11421 | /*typename_keyword_p=*/false, | |
11422 | /*template_keyword_p=*/false, | |
11423 | /*type_p=*/true, | |
a723baf1 MM |
11424 | /*check_dependency_p=*/false, |
11425 | /*class_head_p=*/true); | |
11426 | /* If that didn't work, ignore the nested-name-specifier. */ | |
11427 | if (!cp_parser_parse_definitely (parser)) | |
11428 | { | |
11429 | invalid_nested_name_p = true; | |
11430 | id = cp_parser_identifier (parser); | |
11431 | if (id == error_mark_node) | |
11432 | id = NULL_TREE; | |
11433 | } | |
11434 | /* If we could not find a corresponding TYPE, treat this | |
11435 | declaration like an unqualified declaration. */ | |
11436 | if (type == error_mark_node) | |
11437 | nested_name_specifier = NULL_TREE; | |
11438 | /* Otherwise, count the number of templates used in TYPE and its | |
11439 | containing scopes. */ | |
11440 | else | |
11441 | { | |
11442 | tree scope; | |
11443 | ||
11444 | for (scope = TREE_TYPE (type); | |
11445 | scope && TREE_CODE (scope) != NAMESPACE_DECL; | |
11446 | scope = (TYPE_P (scope) | |
11447 | ? TYPE_CONTEXT (scope) | |
11448 | : DECL_CONTEXT (scope))) | |
11449 | if (TYPE_P (scope) | |
11450 | && CLASS_TYPE_P (scope) | |
11451 | && CLASSTYPE_TEMPLATE_INFO (scope) | |
2050a1bb MM |
11452 | && PRIMARY_TEMPLATE_P (CLASSTYPE_TI_TEMPLATE (scope)) |
11453 | && !CLASSTYPE_TEMPLATE_SPECIALIZATION (scope)) | |
a723baf1 MM |
11454 | ++num_templates; |
11455 | } | |
11456 | } | |
11457 | /* Otherwise, the identifier is optional. */ | |
11458 | else | |
11459 | { | |
11460 | /* We don't know whether what comes next is a template-id, | |
11461 | an identifier, or nothing at all. */ | |
11462 | cp_parser_parse_tentatively (parser); | |
11463 | /* Check for a template-id. */ | |
11464 | id = cp_parser_template_id (parser, | |
11465 | /*template_keyword_p=*/false, | |
11466 | /*check_dependency_p=*/true); | |
11467 | /* If that didn't work, it could still be an identifier. */ | |
11468 | if (!cp_parser_parse_definitely (parser)) | |
11469 | { | |
11470 | if (cp_lexer_next_token_is (parser->lexer, CPP_NAME)) | |
11471 | id = cp_parser_identifier (parser); | |
11472 | else | |
11473 | id = NULL_TREE; | |
11474 | } | |
11475 | else | |
11476 | { | |
11477 | template_id_p = true; | |
11478 | ++num_templates; | |
11479 | } | |
11480 | } | |
11481 | ||
8d241e0b KL |
11482 | pop_deferring_access_checks (); |
11483 | ||
a723baf1 MM |
11484 | /* If it's not a `:' or a `{' then we can't really be looking at a |
11485 | class-head, since a class-head only appears as part of a | |
11486 | class-specifier. We have to detect this situation before calling | |
11487 | xref_tag, since that has irreversible side-effects. */ | |
11488 | if (!cp_parser_next_token_starts_class_definition_p (parser)) | |
11489 | { | |
11490 | cp_parser_error (parser, "expected `{' or `:'"); | |
11491 | return error_mark_node; | |
11492 | } | |
11493 | ||
11494 | /* At this point, we're going ahead with the class-specifier, even | |
11495 | if some other problem occurs. */ | |
11496 | cp_parser_commit_to_tentative_parse (parser); | |
11497 | /* Issue the error about the overly-qualified name now. */ | |
11498 | if (qualified_p) | |
11499 | cp_parser_error (parser, | |
11500 | "global qualification of class name is invalid"); | |
11501 | else if (invalid_nested_name_p) | |
11502 | cp_parser_error (parser, | |
11503 | "qualified name does not name a class"); | |
11504 | /* Make sure that the right number of template parameters were | |
11505 | present. */ | |
11506 | if (!cp_parser_check_template_parameters (parser, num_templates)) | |
11507 | /* If something went wrong, there is no point in even trying to | |
11508 | process the class-definition. */ | |
11509 | return NULL_TREE; | |
11510 | ||
a723baf1 MM |
11511 | /* Look up the type. */ |
11512 | if (template_id_p) | |
11513 | { | |
11514 | type = TREE_TYPE (id); | |
11515 | maybe_process_partial_specialization (type); | |
11516 | } | |
11517 | else if (!nested_name_specifier) | |
11518 | { | |
11519 | /* If the class was unnamed, create a dummy name. */ | |
11520 | if (!id) | |
11521 | id = make_anon_name (); | |
cbd63935 KL |
11522 | type = xref_tag (class_key, id, attributes, /*globalize=*/false, |
11523 | parser->num_template_parameter_lists); | |
a723baf1 MM |
11524 | } |
11525 | else | |
11526 | { | |
a723baf1 | 11527 | tree class_type; |
089d6ea7 | 11528 | tree scope; |
a723baf1 MM |
11529 | |
11530 | /* Given: | |
11531 | ||
11532 | template <typename T> struct S { struct T }; | |
14d22dd6 | 11533 | template <typename T> struct S<T>::T { }; |
a723baf1 MM |
11534 | |
11535 | we will get a TYPENAME_TYPE when processing the definition of | |
11536 | `S::T'. We need to resolve it to the actual type before we | |
11537 | try to define it. */ | |
11538 | if (TREE_CODE (TREE_TYPE (type)) == TYPENAME_TYPE) | |
11539 | { | |
14d22dd6 MM |
11540 | class_type = resolve_typename_type (TREE_TYPE (type), |
11541 | /*only_current_p=*/false); | |
11542 | if (class_type != error_mark_node) | |
11543 | type = TYPE_NAME (class_type); | |
11544 | else | |
11545 | { | |
11546 | cp_parser_error (parser, "could not resolve typename type"); | |
11547 | type = error_mark_node; | |
11548 | } | |
a723baf1 MM |
11549 | } |
11550 | ||
089d6ea7 MM |
11551 | /* Figure out in what scope the declaration is being placed. */ |
11552 | scope = current_scope (); | |
11553 | if (!scope) | |
11554 | scope = current_namespace; | |
11555 | /* If that scope does not contain the scope in which the | |
11556 | class was originally declared, the program is invalid. */ | |
11557 | if (scope && !is_ancestor (scope, CP_DECL_CONTEXT (type))) | |
11558 | { | |
0e136342 | 11559 | error ("declaration of `%D' in `%D' which does not " |
089d6ea7 MM |
11560 | "enclose `%D'", type, scope, nested_name_specifier); |
11561 | return NULL_TREE; | |
11562 | } | |
560ad596 | 11563 | /* [dcl.meaning] |
089d6ea7 | 11564 | |
560ad596 MM |
11565 | A declarator-id shall not be qualified exception of the |
11566 | definition of a ... nested class outside of its class | |
11567 | ... [or] a the definition or explicit instantiation of a | |
11568 | class member of a namespace outside of its namespace. */ | |
11569 | if (scope == CP_DECL_CONTEXT (type)) | |
a723baf1 | 11570 | { |
560ad596 MM |
11571 | pedwarn ("extra qualification ignored"); |
11572 | nested_name_specifier = NULL_TREE; | |
a723baf1 | 11573 | } |
560ad596 MM |
11574 | |
11575 | maybe_process_partial_specialization (TREE_TYPE (type)); | |
11576 | class_type = current_class_type; | |
11577 | /* Enter the scope indicated by the nested-name-specifier. */ | |
11578 | if (nested_name_specifier) | |
11579 | push_scope (nested_name_specifier); | |
11580 | /* Get the canonical version of this type. */ | |
11581 | type = TYPE_MAIN_DECL (TREE_TYPE (type)); | |
11582 | if (PROCESSING_REAL_TEMPLATE_DECL_P () | |
11583 | && !CLASSTYPE_TEMPLATE_SPECIALIZATION (TREE_TYPE (type))) | |
11584 | type = push_template_decl (type); | |
11585 | type = TREE_TYPE (type); | |
11586 | if (nested_name_specifier) | |
11587 | *nested_name_specifier_p = true; | |
a723baf1 MM |
11588 | } |
11589 | /* Indicate whether this class was declared as a `class' or as a | |
11590 | `struct'. */ | |
11591 | if (TREE_CODE (type) == RECORD_TYPE) | |
11592 | CLASSTYPE_DECLARED_CLASS (type) = (class_key == class_type); | |
11593 | cp_parser_check_class_key (class_key, type); | |
11594 | ||
11595 | /* Enter the scope containing the class; the names of base classes | |
11596 | should be looked up in that context. For example, given: | |
11597 | ||
11598 | struct A { struct B {}; struct C; }; | |
11599 | struct A::C : B {}; | |
11600 | ||
11601 | is valid. */ | |
11602 | if (nested_name_specifier) | |
11603 | push_scope (nested_name_specifier); | |
11604 | /* Now, look for the base-clause. */ | |
11605 | token = cp_lexer_peek_token (parser->lexer); | |
11606 | if (token->type == CPP_COLON) | |
11607 | { | |
11608 | tree bases; | |
11609 | ||
11610 | /* Get the list of base-classes. */ | |
11611 | bases = cp_parser_base_clause (parser); | |
11612 | /* Process them. */ | |
11613 | xref_basetypes (type, bases); | |
11614 | } | |
11615 | /* Leave the scope given by the nested-name-specifier. We will | |
11616 | enter the class scope itself while processing the members. */ | |
11617 | if (nested_name_specifier) | |
11618 | pop_scope (nested_name_specifier); | |
11619 | ||
11620 | return type; | |
11621 | } | |
11622 | ||
11623 | /* Parse a class-key. | |
11624 | ||
11625 | class-key: | |
11626 | class | |
11627 | struct | |
11628 | union | |
11629 | ||
11630 | Returns the kind of class-key specified, or none_type to indicate | |
11631 | error. */ | |
11632 | ||
11633 | static enum tag_types | |
94edc4ab | 11634 | cp_parser_class_key (cp_parser* parser) |
a723baf1 MM |
11635 | { |
11636 | cp_token *token; | |
11637 | enum tag_types tag_type; | |
11638 | ||
11639 | /* Look for the class-key. */ | |
11640 | token = cp_parser_require (parser, CPP_KEYWORD, "class-key"); | |
11641 | if (!token) | |
11642 | return none_type; | |
11643 | ||
11644 | /* Check to see if the TOKEN is a class-key. */ | |
11645 | tag_type = cp_parser_token_is_class_key (token); | |
11646 | if (!tag_type) | |
11647 | cp_parser_error (parser, "expected class-key"); | |
11648 | return tag_type; | |
11649 | } | |
11650 | ||
11651 | /* Parse an (optional) member-specification. | |
11652 | ||
11653 | member-specification: | |
11654 | member-declaration member-specification [opt] | |
11655 | access-specifier : member-specification [opt] */ | |
11656 | ||
11657 | static void | |
94edc4ab | 11658 | cp_parser_member_specification_opt (cp_parser* parser) |
a723baf1 MM |
11659 | { |
11660 | while (true) | |
11661 | { | |
11662 | cp_token *token; | |
11663 | enum rid keyword; | |
11664 | ||
11665 | /* Peek at the next token. */ | |
11666 | token = cp_lexer_peek_token (parser->lexer); | |
11667 | /* If it's a `}', or EOF then we've seen all the members. */ | |
11668 | if (token->type == CPP_CLOSE_BRACE || token->type == CPP_EOF) | |
11669 | break; | |
11670 | ||
11671 | /* See if this token is a keyword. */ | |
11672 | keyword = token->keyword; | |
11673 | switch (keyword) | |
11674 | { | |
11675 | case RID_PUBLIC: | |
11676 | case RID_PROTECTED: | |
11677 | case RID_PRIVATE: | |
11678 | /* Consume the access-specifier. */ | |
11679 | cp_lexer_consume_token (parser->lexer); | |
11680 | /* Remember which access-specifier is active. */ | |
11681 | current_access_specifier = token->value; | |
11682 | /* Look for the `:'. */ | |
11683 | cp_parser_require (parser, CPP_COLON, "`:'"); | |
11684 | break; | |
11685 | ||
11686 | default: | |
11687 | /* Otherwise, the next construction must be a | |
11688 | member-declaration. */ | |
11689 | cp_parser_member_declaration (parser); | |
a723baf1 MM |
11690 | } |
11691 | } | |
11692 | } | |
11693 | ||
11694 | /* Parse a member-declaration. | |
11695 | ||
11696 | member-declaration: | |
11697 | decl-specifier-seq [opt] member-declarator-list [opt] ; | |
11698 | function-definition ; [opt] | |
11699 | :: [opt] nested-name-specifier template [opt] unqualified-id ; | |
11700 | using-declaration | |
11701 | template-declaration | |
11702 | ||
11703 | member-declarator-list: | |
11704 | member-declarator | |
11705 | member-declarator-list , member-declarator | |
11706 | ||
11707 | member-declarator: | |
11708 | declarator pure-specifier [opt] | |
11709 | declarator constant-initializer [opt] | |
11710 | identifier [opt] : constant-expression | |
11711 | ||
11712 | GNU Extensions: | |
11713 | ||
11714 | member-declaration: | |
11715 | __extension__ member-declaration | |
11716 | ||
11717 | member-declarator: | |
11718 | declarator attributes [opt] pure-specifier [opt] | |
11719 | declarator attributes [opt] constant-initializer [opt] | |
11720 | identifier [opt] attributes [opt] : constant-expression */ | |
11721 | ||
11722 | static void | |
94edc4ab | 11723 | cp_parser_member_declaration (cp_parser* parser) |
a723baf1 MM |
11724 | { |
11725 | tree decl_specifiers; | |
11726 | tree prefix_attributes; | |
11727 | tree decl; | |
560ad596 | 11728 | int declares_class_or_enum; |
a723baf1 MM |
11729 | bool friend_p; |
11730 | cp_token *token; | |
11731 | int saved_pedantic; | |
11732 | ||
11733 | /* Check for the `__extension__' keyword. */ | |
11734 | if (cp_parser_extension_opt (parser, &saved_pedantic)) | |
11735 | { | |
11736 | /* Recurse. */ | |
11737 | cp_parser_member_declaration (parser); | |
11738 | /* Restore the old value of the PEDANTIC flag. */ | |
11739 | pedantic = saved_pedantic; | |
11740 | ||
11741 | return; | |
11742 | } | |
11743 | ||
11744 | /* Check for a template-declaration. */ | |
11745 | if (cp_lexer_next_token_is_keyword (parser->lexer, RID_TEMPLATE)) | |
11746 | { | |
11747 | /* Parse the template-declaration. */ | |
11748 | cp_parser_template_declaration (parser, /*member_p=*/true); | |
11749 | ||
11750 | return; | |
11751 | } | |
11752 | ||
11753 | /* Check for a using-declaration. */ | |
11754 | if (cp_lexer_next_token_is_keyword (parser->lexer, RID_USING)) | |
11755 | { | |
11756 | /* Parse the using-declaration. */ | |
11757 | cp_parser_using_declaration (parser); | |
11758 | ||
11759 | return; | |
11760 | } | |
11761 | ||
11762 | /* We can't tell whether we're looking at a declaration or a | |
11763 | function-definition. */ | |
11764 | cp_parser_parse_tentatively (parser); | |
11765 | ||
11766 | /* Parse the decl-specifier-seq. */ | |
11767 | decl_specifiers | |
11768 | = cp_parser_decl_specifier_seq (parser, | |
11769 | CP_PARSER_FLAGS_OPTIONAL, | |
11770 | &prefix_attributes, | |
11771 | &declares_class_or_enum); | |
8fbc5ae7 MM |
11772 | /* Check for an invalid type-name. */ |
11773 | if (cp_parser_diagnose_invalid_type_name (parser)) | |
11774 | return; | |
a723baf1 MM |
11775 | /* If there is no declarator, then the decl-specifier-seq should |
11776 | specify a type. */ | |
11777 | if (cp_lexer_next_token_is (parser->lexer, CPP_SEMICOLON)) | |
11778 | { | |
11779 | /* If there was no decl-specifier-seq, and the next token is a | |
11780 | `;', then we have something like: | |
11781 | ||
11782 | struct S { ; }; | |
11783 | ||
11784 | [class.mem] | |
11785 | ||
11786 | Each member-declaration shall declare at least one member | |
11787 | name of the class. */ | |
11788 | if (!decl_specifiers) | |
11789 | { | |
11790 | if (pedantic) | |
11791 | pedwarn ("extra semicolon"); | |
11792 | } | |
11793 | else | |
11794 | { | |
11795 | tree type; | |
11796 | ||
11797 | /* See if this declaration is a friend. */ | |
11798 | friend_p = cp_parser_friend_p (decl_specifiers); | |
11799 | /* If there were decl-specifiers, check to see if there was | |
11800 | a class-declaration. */ | |
11801 | type = check_tag_decl (decl_specifiers); | |
11802 | /* Nested classes have already been added to the class, but | |
11803 | a `friend' needs to be explicitly registered. */ | |
11804 | if (friend_p) | |
11805 | { | |
11806 | /* If the `friend' keyword was present, the friend must | |
11807 | be introduced with a class-key. */ | |
11808 | if (!declares_class_or_enum) | |
11809 | error ("a class-key must be used when declaring a friend"); | |
11810 | /* In this case: | |
11811 | ||
11812 | template <typename T> struct A { | |
11813 | friend struct A<T>::B; | |
11814 | }; | |
11815 | ||
11816 | A<T>::B will be represented by a TYPENAME_TYPE, and | |
11817 | therefore not recognized by check_tag_decl. */ | |
11818 | if (!type) | |
11819 | { | |
11820 | tree specifier; | |
11821 | ||
11822 | for (specifier = decl_specifiers; | |
11823 | specifier; | |
11824 | specifier = TREE_CHAIN (specifier)) | |
11825 | { | |
11826 | tree s = TREE_VALUE (specifier); | |
11827 | ||
11828 | if (TREE_CODE (s) == IDENTIFIER_NODE | |
11829 | && IDENTIFIER_GLOBAL_VALUE (s)) | |
11830 | type = IDENTIFIER_GLOBAL_VALUE (s); | |
11831 | if (TREE_CODE (s) == TYPE_DECL) | |
11832 | s = TREE_TYPE (s); | |
11833 | if (TYPE_P (s)) | |
11834 | { | |
11835 | type = s; | |
11836 | break; | |
11837 | } | |
11838 | } | |
11839 | } | |
11840 | if (!type) | |
11841 | error ("friend declaration does not name a class or " | |
11842 | "function"); | |
11843 | else | |
19db77ce KL |
11844 | make_friend_class (current_class_type, type, |
11845 | /*complain=*/true); | |
a723baf1 MM |
11846 | } |
11847 | /* If there is no TYPE, an error message will already have | |
11848 | been issued. */ | |
11849 | else if (!type) | |
11850 | ; | |
11851 | /* An anonymous aggregate has to be handled specially; such | |
11852 | a declaration really declares a data member (with a | |
11853 | particular type), as opposed to a nested class. */ | |
11854 | else if (ANON_AGGR_TYPE_P (type)) | |
11855 | { | |
11856 | /* Remove constructors and such from TYPE, now that we | |
34cd5ae7 | 11857 | know it is an anonymous aggregate. */ |
a723baf1 MM |
11858 | fixup_anonymous_aggr (type); |
11859 | /* And make the corresponding data member. */ | |
11860 | decl = build_decl (FIELD_DECL, NULL_TREE, type); | |
11861 | /* Add it to the class. */ | |
11862 | finish_member_declaration (decl); | |
11863 | } | |
11864 | } | |
11865 | } | |
11866 | else | |
11867 | { | |
11868 | /* See if these declarations will be friends. */ | |
11869 | friend_p = cp_parser_friend_p (decl_specifiers); | |
11870 | ||
11871 | /* Keep going until we hit the `;' at the end of the | |
11872 | declaration. */ | |
11873 | while (cp_lexer_next_token_is_not (parser->lexer, CPP_SEMICOLON)) | |
11874 | { | |
11875 | tree attributes = NULL_TREE; | |
11876 | tree first_attribute; | |
11877 | ||
11878 | /* Peek at the next token. */ | |
11879 | token = cp_lexer_peek_token (parser->lexer); | |
11880 | ||
11881 | /* Check for a bitfield declaration. */ | |
11882 | if (token->type == CPP_COLON | |
11883 | || (token->type == CPP_NAME | |
11884 | && cp_lexer_peek_nth_token (parser->lexer, 2)->type | |
11885 | == CPP_COLON)) | |
11886 | { | |
11887 | tree identifier; | |
11888 | tree width; | |
11889 | ||
11890 | /* Get the name of the bitfield. Note that we cannot just | |
11891 | check TOKEN here because it may have been invalidated by | |
11892 | the call to cp_lexer_peek_nth_token above. */ | |
11893 | if (cp_lexer_peek_token (parser->lexer)->type != CPP_COLON) | |
11894 | identifier = cp_parser_identifier (parser); | |
11895 | else | |
11896 | identifier = NULL_TREE; | |
11897 | ||
11898 | /* Consume the `:' token. */ | |
11899 | cp_lexer_consume_token (parser->lexer); | |
11900 | /* Get the width of the bitfield. */ | |
14d22dd6 MM |
11901 | width |
11902 | = cp_parser_constant_expression (parser, | |
11903 | /*allow_non_constant=*/false, | |
11904 | NULL); | |
a723baf1 MM |
11905 | |
11906 | /* Look for attributes that apply to the bitfield. */ | |
11907 | attributes = cp_parser_attributes_opt (parser); | |
11908 | /* Remember which attributes are prefix attributes and | |
11909 | which are not. */ | |
11910 | first_attribute = attributes; | |
11911 | /* Combine the attributes. */ | |
11912 | attributes = chainon (prefix_attributes, attributes); | |
11913 | ||
11914 | /* Create the bitfield declaration. */ | |
11915 | decl = grokbitfield (identifier, | |
11916 | decl_specifiers, | |
11917 | width); | |
11918 | /* Apply the attributes. */ | |
11919 | cplus_decl_attributes (&decl, attributes, /*flags=*/0); | |
11920 | } | |
11921 | else | |
11922 | { | |
11923 | tree declarator; | |
11924 | tree initializer; | |
11925 | tree asm_specification; | |
7efa3e22 | 11926 | int ctor_dtor_or_conv_p; |
a723baf1 MM |
11927 | |
11928 | /* Parse the declarator. */ | |
11929 | declarator | |
62b8a44e | 11930 | = cp_parser_declarator (parser, CP_PARSER_DECLARATOR_NAMED, |
a723baf1 MM |
11931 | &ctor_dtor_or_conv_p); |
11932 | ||
11933 | /* If something went wrong parsing the declarator, make sure | |
11934 | that we at least consume some tokens. */ | |
11935 | if (declarator == error_mark_node) | |
11936 | { | |
11937 | /* Skip to the end of the statement. */ | |
11938 | cp_parser_skip_to_end_of_statement (parser); | |
11939 | break; | |
11940 | } | |
11941 | ||
560ad596 MM |
11942 | cp_parser_check_for_definition_in_return_type |
11943 | (declarator, declares_class_or_enum); | |
11944 | ||
a723baf1 MM |
11945 | /* Look for an asm-specification. */ |
11946 | asm_specification = cp_parser_asm_specification_opt (parser); | |
11947 | /* Look for attributes that apply to the declaration. */ | |
11948 | attributes = cp_parser_attributes_opt (parser); | |
11949 | /* Remember which attributes are prefix attributes and | |
11950 | which are not. */ | |
11951 | first_attribute = attributes; | |
11952 | /* Combine the attributes. */ | |
11953 | attributes = chainon (prefix_attributes, attributes); | |
11954 | ||
11955 | /* If it's an `=', then we have a constant-initializer or a | |
11956 | pure-specifier. It is not correct to parse the | |
11957 | initializer before registering the member declaration | |
11958 | since the member declaration should be in scope while | |
11959 | its initializer is processed. However, the rest of the | |
11960 | front end does not yet provide an interface that allows | |
11961 | us to handle this correctly. */ | |
11962 | if (cp_lexer_next_token_is (parser->lexer, CPP_EQ)) | |
11963 | { | |
11964 | /* In [class.mem]: | |
11965 | ||
11966 | A pure-specifier shall be used only in the declaration of | |
11967 | a virtual function. | |
11968 | ||
11969 | A member-declarator can contain a constant-initializer | |
11970 | only if it declares a static member of integral or | |
11971 | enumeration type. | |
11972 | ||
11973 | Therefore, if the DECLARATOR is for a function, we look | |
11974 | for a pure-specifier; otherwise, we look for a | |
11975 | constant-initializer. When we call `grokfield', it will | |
11976 | perform more stringent semantics checks. */ | |
11977 | if (TREE_CODE (declarator) == CALL_EXPR) | |
11978 | initializer = cp_parser_pure_specifier (parser); | |
11979 | else | |
11980 | { | |
11981 | /* This declaration cannot be a function | |
11982 | definition. */ | |
11983 | cp_parser_commit_to_tentative_parse (parser); | |
11984 | /* Parse the initializer. */ | |
11985 | initializer = cp_parser_constant_initializer (parser); | |
11986 | } | |
11987 | } | |
11988 | /* Otherwise, there is no initializer. */ | |
11989 | else | |
11990 | initializer = NULL_TREE; | |
11991 | ||
11992 | /* See if we are probably looking at a function | |
11993 | definition. We are certainly not looking at at a | |
11994 | member-declarator. Calling `grokfield' has | |
11995 | side-effects, so we must not do it unless we are sure | |
11996 | that we are looking at a member-declarator. */ | |
11997 | if (cp_parser_token_starts_function_definition_p | |
11998 | (cp_lexer_peek_token (parser->lexer))) | |
11999 | decl = error_mark_node; | |
12000 | else | |
39703eb9 MM |
12001 | { |
12002 | /* Create the declaration. */ | |
ee3071ef NS |
12003 | decl = grokfield (declarator, decl_specifiers, |
12004 | initializer, asm_specification, | |
39703eb9 MM |
12005 | attributes); |
12006 | /* Any initialization must have been from a | |
12007 | constant-expression. */ | |
12008 | if (decl && TREE_CODE (decl) == VAR_DECL && initializer) | |
12009 | DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (decl) = 1; | |
12010 | } | |
a723baf1 MM |
12011 | } |
12012 | ||
12013 | /* Reset PREFIX_ATTRIBUTES. */ | |
12014 | while (attributes && TREE_CHAIN (attributes) != first_attribute) | |
12015 | attributes = TREE_CHAIN (attributes); | |
12016 | if (attributes) | |
12017 | TREE_CHAIN (attributes) = NULL_TREE; | |
12018 | ||
12019 | /* If there is any qualification still in effect, clear it | |
12020 | now; we will be starting fresh with the next declarator. */ | |
12021 | parser->scope = NULL_TREE; | |
12022 | parser->qualifying_scope = NULL_TREE; | |
12023 | parser->object_scope = NULL_TREE; | |
12024 | /* If it's a `,', then there are more declarators. */ | |
12025 | if (cp_lexer_next_token_is (parser->lexer, CPP_COMMA)) | |
12026 | cp_lexer_consume_token (parser->lexer); | |
12027 | /* If the next token isn't a `;', then we have a parse error. */ | |
12028 | else if (cp_lexer_next_token_is_not (parser->lexer, | |
12029 | CPP_SEMICOLON)) | |
12030 | { | |
12031 | cp_parser_error (parser, "expected `;'"); | |
12032 | /* Skip tokens until we find a `;' */ | |
12033 | cp_parser_skip_to_end_of_statement (parser); | |
12034 | ||
12035 | break; | |
12036 | } | |
12037 | ||
12038 | if (decl) | |
12039 | { | |
12040 | /* Add DECL to the list of members. */ | |
12041 | if (!friend_p) | |
12042 | finish_member_declaration (decl); | |
12043 | ||
a723baf1 | 12044 | if (TREE_CODE (decl) == FUNCTION_DECL) |
8db1028e | 12045 | cp_parser_save_default_args (parser, decl); |
a723baf1 MM |
12046 | } |
12047 | } | |
12048 | } | |
12049 | ||
12050 | /* If everything went well, look for the `;'. */ | |
12051 | if (cp_parser_parse_definitely (parser)) | |
12052 | { | |
12053 | cp_parser_require (parser, CPP_SEMICOLON, "`;'"); | |
12054 | return; | |
12055 | } | |
12056 | ||
12057 | /* Parse the function-definition. */ | |
12058 | decl = cp_parser_function_definition (parser, &friend_p); | |
12059 | /* If the member was not a friend, declare it here. */ | |
12060 | if (!friend_p) | |
12061 | finish_member_declaration (decl); | |
12062 | /* Peek at the next token. */ | |
12063 | token = cp_lexer_peek_token (parser->lexer); | |
12064 | /* If the next token is a semicolon, consume it. */ | |
12065 | if (token->type == CPP_SEMICOLON) | |
12066 | cp_lexer_consume_token (parser->lexer); | |
12067 | } | |
12068 | ||
12069 | /* Parse a pure-specifier. | |
12070 | ||
12071 | pure-specifier: | |
12072 | = 0 | |
12073 | ||
12074 | Returns INTEGER_ZERO_NODE if a pure specifier is found. | |
12075 | Otherwiser, ERROR_MARK_NODE is returned. */ | |
12076 | ||
12077 | static tree | |
94edc4ab | 12078 | cp_parser_pure_specifier (cp_parser* parser) |
a723baf1 MM |
12079 | { |
12080 | cp_token *token; | |
12081 | ||
12082 | /* Look for the `=' token. */ | |
12083 | if (!cp_parser_require (parser, CPP_EQ, "`='")) | |
12084 | return error_mark_node; | |
12085 | /* Look for the `0' token. */ | |
12086 | token = cp_parser_require (parser, CPP_NUMBER, "`0'"); | |
12087 | /* Unfortunately, this will accept `0L' and `0x00' as well. We need | |
12088 | to get information from the lexer about how the number was | |
12089 | spelled in order to fix this problem. */ | |
12090 | if (!token || !integer_zerop (token->value)) | |
12091 | return error_mark_node; | |
12092 | ||
12093 | return integer_zero_node; | |
12094 | } | |
12095 | ||
12096 | /* Parse a constant-initializer. | |
12097 | ||
12098 | constant-initializer: | |
12099 | = constant-expression | |
12100 | ||
12101 | Returns a representation of the constant-expression. */ | |
12102 | ||
12103 | static tree | |
94edc4ab | 12104 | cp_parser_constant_initializer (cp_parser* parser) |
a723baf1 MM |
12105 | { |
12106 | /* Look for the `=' token. */ | |
12107 | if (!cp_parser_require (parser, CPP_EQ, "`='")) | |
12108 | return error_mark_node; | |
12109 | ||
12110 | /* It is invalid to write: | |
12111 | ||
12112 | struct S { static const int i = { 7 }; }; | |
12113 | ||
12114 | */ | |
12115 | if (cp_lexer_next_token_is (parser->lexer, CPP_OPEN_BRACE)) | |
12116 | { | |
12117 | cp_parser_error (parser, | |
12118 | "a brace-enclosed initializer is not allowed here"); | |
12119 | /* Consume the opening brace. */ | |
12120 | cp_lexer_consume_token (parser->lexer); | |
12121 | /* Skip the initializer. */ | |
12122 | cp_parser_skip_to_closing_brace (parser); | |
12123 | /* Look for the trailing `}'. */ | |
12124 | cp_parser_require (parser, CPP_CLOSE_BRACE, "`}'"); | |
12125 | ||
12126 | return error_mark_node; | |
12127 | } | |
12128 | ||
14d22dd6 MM |
12129 | return cp_parser_constant_expression (parser, |
12130 | /*allow_non_constant=*/false, | |
12131 | NULL); | |
a723baf1 MM |
12132 | } |
12133 | ||
12134 | /* Derived classes [gram.class.derived] */ | |
12135 | ||
12136 | /* Parse a base-clause. | |
12137 | ||
12138 | base-clause: | |
12139 | : base-specifier-list | |
12140 | ||
12141 | base-specifier-list: | |
12142 | base-specifier | |
12143 | base-specifier-list , base-specifier | |
12144 | ||
12145 | Returns a TREE_LIST representing the base-classes, in the order in | |
12146 | which they were declared. The representation of each node is as | |
12147 | described by cp_parser_base_specifier. | |
12148 | ||
12149 | In the case that no bases are specified, this function will return | |
12150 | NULL_TREE, not ERROR_MARK_NODE. */ | |
12151 | ||
12152 | static tree | |
94edc4ab | 12153 | cp_parser_base_clause (cp_parser* parser) |
a723baf1 MM |
12154 | { |
12155 | tree bases = NULL_TREE; | |
12156 | ||
12157 | /* Look for the `:' that begins the list. */ | |
12158 | cp_parser_require (parser, CPP_COLON, "`:'"); | |
12159 | ||
12160 | /* Scan the base-specifier-list. */ | |
12161 | while (true) | |
12162 | { | |
12163 | cp_token *token; | |
12164 | tree base; | |
12165 | ||
12166 | /* Look for the base-specifier. */ | |
12167 | base = cp_parser_base_specifier (parser); | |
12168 | /* Add BASE to the front of the list. */ | |
12169 | if (base != error_mark_node) | |
12170 | { | |
12171 | TREE_CHAIN (base) = bases; | |
12172 | bases = base; | |
12173 | } | |
12174 | /* Peek at the next token. */ | |
12175 | token = cp_lexer_peek_token (parser->lexer); | |
12176 | /* If it's not a comma, then the list is complete. */ | |
12177 | if (token->type != CPP_COMMA) | |
12178 | break; | |
12179 | /* Consume the `,'. */ | |
12180 | cp_lexer_consume_token (parser->lexer); | |
12181 | } | |
12182 | ||
12183 | /* PARSER->SCOPE may still be non-NULL at this point, if the last | |
12184 | base class had a qualified name. However, the next name that | |
12185 | appears is certainly not qualified. */ | |
12186 | parser->scope = NULL_TREE; | |
12187 | parser->qualifying_scope = NULL_TREE; | |
12188 | parser->object_scope = NULL_TREE; | |
12189 | ||
12190 | return nreverse (bases); | |
12191 | } | |
12192 | ||
12193 | /* Parse a base-specifier. | |
12194 | ||
12195 | base-specifier: | |
12196 | :: [opt] nested-name-specifier [opt] class-name | |
12197 | virtual access-specifier [opt] :: [opt] nested-name-specifier | |
12198 | [opt] class-name | |
12199 | access-specifier virtual [opt] :: [opt] nested-name-specifier | |
12200 | [opt] class-name | |
12201 | ||
12202 | Returns a TREE_LIST. The TREE_PURPOSE will be one of | |
12203 | ACCESS_{DEFAULT,PUBLIC,PROTECTED,PRIVATE}_[VIRTUAL]_NODE to | |
12204 | indicate the specifiers provided. The TREE_VALUE will be a TYPE | |
12205 | (or the ERROR_MARK_NODE) indicating the type that was specified. */ | |
12206 | ||
12207 | static tree | |
94edc4ab | 12208 | cp_parser_base_specifier (cp_parser* parser) |
a723baf1 MM |
12209 | { |
12210 | cp_token *token; | |
12211 | bool done = false; | |
12212 | bool virtual_p = false; | |
12213 | bool duplicate_virtual_error_issued_p = false; | |
12214 | bool duplicate_access_error_issued_p = false; | |
bbaab916 | 12215 | bool class_scope_p, template_p; |
dbbf88d1 | 12216 | tree access = access_default_node; |
a723baf1 MM |
12217 | tree type; |
12218 | ||
12219 | /* Process the optional `virtual' and `access-specifier'. */ | |
12220 | while (!done) | |
12221 | { | |
12222 | /* Peek at the next token. */ | |
12223 | token = cp_lexer_peek_token (parser->lexer); | |
12224 | /* Process `virtual'. */ | |
12225 | switch (token->keyword) | |
12226 | { | |
12227 | case RID_VIRTUAL: | |
12228 | /* If `virtual' appears more than once, issue an error. */ | |
12229 | if (virtual_p && !duplicate_virtual_error_issued_p) | |
12230 | { | |
12231 | cp_parser_error (parser, | |
12232 | "`virtual' specified more than once in base-specified"); | |
12233 | duplicate_virtual_error_issued_p = true; | |
12234 | } | |
12235 | ||
12236 | virtual_p = true; | |
12237 | ||
12238 | /* Consume the `virtual' token. */ | |
12239 | cp_lexer_consume_token (parser->lexer); | |
12240 | ||
12241 | break; | |
12242 | ||
12243 | case RID_PUBLIC: | |
12244 | case RID_PROTECTED: | |
12245 | case RID_PRIVATE: | |
12246 | /* If more than one access specifier appears, issue an | |
12247 | error. */ | |
dbbf88d1 NS |
12248 | if (access != access_default_node |
12249 | && !duplicate_access_error_issued_p) | |
a723baf1 MM |
12250 | { |
12251 | cp_parser_error (parser, | |
12252 | "more than one access specifier in base-specified"); | |
12253 | duplicate_access_error_issued_p = true; | |
12254 | } | |
12255 | ||
dbbf88d1 | 12256 | access = ridpointers[(int) token->keyword]; |
a723baf1 MM |
12257 | |
12258 | /* Consume the access-specifier. */ | |
12259 | cp_lexer_consume_token (parser->lexer); | |
12260 | ||
12261 | break; | |
12262 | ||
12263 | default: | |
12264 | done = true; | |
12265 | break; | |
12266 | } | |
12267 | } | |
12268 | ||
a723baf1 MM |
12269 | /* Look for the optional `::' operator. */ |
12270 | cp_parser_global_scope_opt (parser, /*current_scope_valid_p=*/false); | |
12271 | /* Look for the nested-name-specifier. The simplest way to | |
12272 | implement: | |
12273 | ||
12274 | [temp.res] | |
12275 | ||
12276 | The keyword `typename' is not permitted in a base-specifier or | |
12277 | mem-initializer; in these contexts a qualified name that | |
12278 | depends on a template-parameter is implicitly assumed to be a | |
12279 | type name. | |
12280 | ||
12281 | is to pretend that we have seen the `typename' keyword at this | |
12282 | point. */ | |
12283 | cp_parser_nested_name_specifier_opt (parser, | |
12284 | /*typename_keyword_p=*/true, | |
12285 | /*check_dependency_p=*/true, | |
12286 | /*type_p=*/true); | |
12287 | /* If the base class is given by a qualified name, assume that names | |
12288 | we see are type names or templates, as appropriate. */ | |
12289 | class_scope_p = (parser->scope && TYPE_P (parser->scope)); | |
bbaab916 NS |
12290 | template_p = class_scope_p && cp_parser_optional_template_keyword (parser); |
12291 | ||
a723baf1 MM |
12292 | /* Finally, look for the class-name. */ |
12293 | type = cp_parser_class_name (parser, | |
12294 | class_scope_p, | |
bbaab916 | 12295 | template_p, |
a723baf1 | 12296 | /*type_p=*/true, |
a723baf1 MM |
12297 | /*check_dependency_p=*/true, |
12298 | /*class_head_p=*/false); | |
12299 | ||
12300 | if (type == error_mark_node) | |
12301 | return error_mark_node; | |
12302 | ||
dbbf88d1 | 12303 | return finish_base_specifier (TREE_TYPE (type), access, virtual_p); |
a723baf1 MM |
12304 | } |
12305 | ||
12306 | /* Exception handling [gram.exception] */ | |
12307 | ||
12308 | /* Parse an (optional) exception-specification. | |
12309 | ||
12310 | exception-specification: | |
12311 | throw ( type-id-list [opt] ) | |
12312 | ||
12313 | Returns a TREE_LIST representing the exception-specification. The | |
12314 | TREE_VALUE of each node is a type. */ | |
12315 | ||
12316 | static tree | |
94edc4ab | 12317 | cp_parser_exception_specification_opt (cp_parser* parser) |
a723baf1 MM |
12318 | { |
12319 | cp_token *token; | |
12320 | tree type_id_list; | |
12321 | ||
12322 | /* Peek at the next token. */ | |
12323 | token = cp_lexer_peek_token (parser->lexer); | |
12324 | /* If it's not `throw', then there's no exception-specification. */ | |
12325 | if (!cp_parser_is_keyword (token, RID_THROW)) | |
12326 | return NULL_TREE; | |
12327 | ||
12328 | /* Consume the `throw'. */ | |
12329 | cp_lexer_consume_token (parser->lexer); | |
12330 | ||
12331 | /* Look for the `('. */ | |
12332 | cp_parser_require (parser, CPP_OPEN_PAREN, "`('"); | |
12333 | ||
12334 | /* Peek at the next token. */ | |
12335 | token = cp_lexer_peek_token (parser->lexer); | |
12336 | /* If it's not a `)', then there is a type-id-list. */ | |
12337 | if (token->type != CPP_CLOSE_PAREN) | |
12338 | { | |
12339 | const char *saved_message; | |
12340 | ||
12341 | /* Types may not be defined in an exception-specification. */ | |
12342 | saved_message = parser->type_definition_forbidden_message; | |
12343 | parser->type_definition_forbidden_message | |
12344 | = "types may not be defined in an exception-specification"; | |
12345 | /* Parse the type-id-list. */ | |
12346 | type_id_list = cp_parser_type_id_list (parser); | |
12347 | /* Restore the saved message. */ | |
12348 | parser->type_definition_forbidden_message = saved_message; | |
12349 | } | |
12350 | else | |
12351 | type_id_list = empty_except_spec; | |
12352 | ||
12353 | /* Look for the `)'. */ | |
12354 | cp_parser_require (parser, CPP_CLOSE_PAREN, "`)'"); | |
12355 | ||
12356 | return type_id_list; | |
12357 | } | |
12358 | ||
12359 | /* Parse an (optional) type-id-list. | |
12360 | ||
12361 | type-id-list: | |
12362 | type-id | |
12363 | type-id-list , type-id | |
12364 | ||
12365 | Returns a TREE_LIST. The TREE_VALUE of each node is a TYPE, | |
12366 | in the order that the types were presented. */ | |
12367 | ||
12368 | static tree | |
94edc4ab | 12369 | cp_parser_type_id_list (cp_parser* parser) |
a723baf1 MM |
12370 | { |
12371 | tree types = NULL_TREE; | |
12372 | ||
12373 | while (true) | |
12374 | { | |
12375 | cp_token *token; | |
12376 | tree type; | |
12377 | ||
12378 | /* Get the next type-id. */ | |
12379 | type = cp_parser_type_id (parser); | |
12380 | /* Add it to the list. */ | |
12381 | types = add_exception_specifier (types, type, /*complain=*/1); | |
12382 | /* Peek at the next token. */ | |
12383 | token = cp_lexer_peek_token (parser->lexer); | |
12384 | /* If it is not a `,', we are done. */ | |
12385 | if (token->type != CPP_COMMA) | |
12386 | break; | |
12387 | /* Consume the `,'. */ | |
12388 | cp_lexer_consume_token (parser->lexer); | |
12389 | } | |
12390 | ||
12391 | return nreverse (types); | |
12392 | } | |
12393 | ||
12394 | /* Parse a try-block. | |
12395 | ||
12396 | try-block: | |
12397 | try compound-statement handler-seq */ | |
12398 | ||
12399 | static tree | |
94edc4ab | 12400 | cp_parser_try_block (cp_parser* parser) |
a723baf1 MM |
12401 | { |
12402 | tree try_block; | |
12403 | ||
12404 | cp_parser_require_keyword (parser, RID_TRY, "`try'"); | |
12405 | try_block = begin_try_block (); | |
a5bcc582 | 12406 | cp_parser_compound_statement (parser, false); |
a723baf1 MM |
12407 | finish_try_block (try_block); |
12408 | cp_parser_handler_seq (parser); | |
12409 | finish_handler_sequence (try_block); | |
12410 | ||
12411 | return try_block; | |
12412 | } | |
12413 | ||
12414 | /* Parse a function-try-block. | |
12415 | ||
12416 | function-try-block: | |
12417 | try ctor-initializer [opt] function-body handler-seq */ | |
12418 | ||
12419 | static bool | |
94edc4ab | 12420 | cp_parser_function_try_block (cp_parser* parser) |
a723baf1 MM |
12421 | { |
12422 | tree try_block; | |
12423 | bool ctor_initializer_p; | |
12424 | ||
12425 | /* Look for the `try' keyword. */ | |
12426 | if (!cp_parser_require_keyword (parser, RID_TRY, "`try'")) | |
12427 | return false; | |
12428 | /* Let the rest of the front-end know where we are. */ | |
12429 | try_block = begin_function_try_block (); | |
12430 | /* Parse the function-body. */ | |
12431 | ctor_initializer_p | |
12432 | = cp_parser_ctor_initializer_opt_and_function_body (parser); | |
12433 | /* We're done with the `try' part. */ | |
12434 | finish_function_try_block (try_block); | |
12435 | /* Parse the handlers. */ | |
12436 | cp_parser_handler_seq (parser); | |
12437 | /* We're done with the handlers. */ | |
12438 | finish_function_handler_sequence (try_block); | |
12439 | ||
12440 | return ctor_initializer_p; | |
12441 | } | |
12442 | ||
12443 | /* Parse a handler-seq. | |
12444 | ||
12445 | handler-seq: | |
12446 | handler handler-seq [opt] */ | |
12447 | ||
12448 | static void | |
94edc4ab | 12449 | cp_parser_handler_seq (cp_parser* parser) |
a723baf1 MM |
12450 | { |
12451 | while (true) | |
12452 | { | |
12453 | cp_token *token; | |
12454 | ||
12455 | /* Parse the handler. */ | |
12456 | cp_parser_handler (parser); | |
12457 | /* Peek at the next token. */ | |
12458 | token = cp_lexer_peek_token (parser->lexer); | |
12459 | /* If it's not `catch' then there are no more handlers. */ | |
12460 | if (!cp_parser_is_keyword (token, RID_CATCH)) | |
12461 | break; | |
12462 | } | |
12463 | } | |
12464 | ||
12465 | /* Parse a handler. | |
12466 | ||
12467 | handler: | |
12468 | catch ( exception-declaration ) compound-statement */ | |
12469 | ||
12470 | static void | |
94edc4ab | 12471 | cp_parser_handler (cp_parser* parser) |
a723baf1 MM |
12472 | { |
12473 | tree handler; | |
12474 | tree declaration; | |
12475 | ||
12476 | cp_parser_require_keyword (parser, RID_CATCH, "`catch'"); | |
12477 | handler = begin_handler (); | |
12478 | cp_parser_require (parser, CPP_OPEN_PAREN, "`('"); | |
12479 | declaration = cp_parser_exception_declaration (parser); | |
12480 | finish_handler_parms (declaration, handler); | |
12481 | cp_parser_require (parser, CPP_CLOSE_PAREN, "`)'"); | |
a5bcc582 | 12482 | cp_parser_compound_statement (parser, false); |
a723baf1 MM |
12483 | finish_handler (handler); |
12484 | } | |
12485 | ||
12486 | /* Parse an exception-declaration. | |
12487 | ||
12488 | exception-declaration: | |
12489 | type-specifier-seq declarator | |
12490 | type-specifier-seq abstract-declarator | |
12491 | type-specifier-seq | |
12492 | ... | |
12493 | ||
12494 | Returns a VAR_DECL for the declaration, or NULL_TREE if the | |
12495 | ellipsis variant is used. */ | |
12496 | ||
12497 | static tree | |
94edc4ab | 12498 | cp_parser_exception_declaration (cp_parser* parser) |
a723baf1 MM |
12499 | { |
12500 | tree type_specifiers; | |
12501 | tree declarator; | |
12502 | const char *saved_message; | |
12503 | ||
12504 | /* If it's an ellipsis, it's easy to handle. */ | |
12505 | if (cp_lexer_next_token_is (parser->lexer, CPP_ELLIPSIS)) | |
12506 | { | |
12507 | /* Consume the `...' token. */ | |
12508 | cp_lexer_consume_token (parser->lexer); | |
12509 | return NULL_TREE; | |
12510 | } | |
12511 | ||
12512 | /* Types may not be defined in exception-declarations. */ | |
12513 | saved_message = parser->type_definition_forbidden_message; | |
12514 | parser->type_definition_forbidden_message | |
12515 | = "types may not be defined in exception-declarations"; | |
12516 | ||
12517 | /* Parse the type-specifier-seq. */ | |
12518 | type_specifiers = cp_parser_type_specifier_seq (parser); | |
12519 | /* If it's a `)', then there is no declarator. */ | |
12520 | if (cp_lexer_next_token_is (parser->lexer, CPP_CLOSE_PAREN)) | |
12521 | declarator = NULL_TREE; | |
12522 | else | |
62b8a44e NS |
12523 | declarator = cp_parser_declarator (parser, CP_PARSER_DECLARATOR_EITHER, |
12524 | /*ctor_dtor_or_conv_p=*/NULL); | |
a723baf1 MM |
12525 | |
12526 | /* Restore the saved message. */ | |
12527 | parser->type_definition_forbidden_message = saved_message; | |
12528 | ||
12529 | return start_handler_parms (type_specifiers, declarator); | |
12530 | } | |
12531 | ||
12532 | /* Parse a throw-expression. | |
12533 | ||
12534 | throw-expression: | |
34cd5ae7 | 12535 | throw assignment-expression [opt] |
a723baf1 MM |
12536 | |
12537 | Returns a THROW_EXPR representing the throw-expression. */ | |
12538 | ||
12539 | static tree | |
94edc4ab | 12540 | cp_parser_throw_expression (cp_parser* parser) |
a723baf1 MM |
12541 | { |
12542 | tree expression; | |
12543 | ||
12544 | cp_parser_require_keyword (parser, RID_THROW, "`throw'"); | |
12545 | /* We can't be sure if there is an assignment-expression or not. */ | |
12546 | cp_parser_parse_tentatively (parser); | |
12547 | /* Try it. */ | |
12548 | expression = cp_parser_assignment_expression (parser); | |
12549 | /* If it didn't work, this is just a rethrow. */ | |
12550 | if (!cp_parser_parse_definitely (parser)) | |
12551 | expression = NULL_TREE; | |
12552 | ||
12553 | return build_throw (expression); | |
12554 | } | |
12555 | ||
12556 | /* GNU Extensions */ | |
12557 | ||
12558 | /* Parse an (optional) asm-specification. | |
12559 | ||
12560 | asm-specification: | |
12561 | asm ( string-literal ) | |
12562 | ||
12563 | If the asm-specification is present, returns a STRING_CST | |
12564 | corresponding to the string-literal. Otherwise, returns | |
12565 | NULL_TREE. */ | |
12566 | ||
12567 | static tree | |
94edc4ab | 12568 | cp_parser_asm_specification_opt (cp_parser* parser) |
a723baf1 MM |
12569 | { |
12570 | cp_token *token; | |
12571 | tree asm_specification; | |
12572 | ||
12573 | /* Peek at the next token. */ | |
12574 | token = cp_lexer_peek_token (parser->lexer); | |
12575 | /* If the next token isn't the `asm' keyword, then there's no | |
12576 | asm-specification. */ | |
12577 | if (!cp_parser_is_keyword (token, RID_ASM)) | |
12578 | return NULL_TREE; | |
12579 | ||
12580 | /* Consume the `asm' token. */ | |
12581 | cp_lexer_consume_token (parser->lexer); | |
12582 | /* Look for the `('. */ | |
12583 | cp_parser_require (parser, CPP_OPEN_PAREN, "`('"); | |
12584 | ||
12585 | /* Look for the string-literal. */ | |
12586 | token = cp_parser_require (parser, CPP_STRING, "string-literal"); | |
12587 | if (token) | |
12588 | asm_specification = token->value; | |
12589 | else | |
12590 | asm_specification = NULL_TREE; | |
12591 | ||
12592 | /* Look for the `)'. */ | |
12593 | cp_parser_require (parser, CPP_CLOSE_PAREN, "`('"); | |
12594 | ||
12595 | return asm_specification; | |
12596 | } | |
12597 | ||
12598 | /* Parse an asm-operand-list. | |
12599 | ||
12600 | asm-operand-list: | |
12601 | asm-operand | |
12602 | asm-operand-list , asm-operand | |
12603 | ||
12604 | asm-operand: | |
12605 | string-literal ( expression ) | |
12606 | [ string-literal ] string-literal ( expression ) | |
12607 | ||
12608 | Returns a TREE_LIST representing the operands. The TREE_VALUE of | |
12609 | each node is the expression. The TREE_PURPOSE is itself a | |
12610 | TREE_LIST whose TREE_PURPOSE is a STRING_CST for the bracketed | |
12611 | string-literal (or NULL_TREE if not present) and whose TREE_VALUE | |
12612 | is a STRING_CST for the string literal before the parenthesis. */ | |
12613 | ||
12614 | static tree | |
94edc4ab | 12615 | cp_parser_asm_operand_list (cp_parser* parser) |
a723baf1 MM |
12616 | { |
12617 | tree asm_operands = NULL_TREE; | |
12618 | ||
12619 | while (true) | |
12620 | { | |
12621 | tree string_literal; | |
12622 | tree expression; | |
12623 | tree name; | |
12624 | cp_token *token; | |
12625 | ||
12626 | if (cp_lexer_next_token_is (parser->lexer, CPP_OPEN_SQUARE)) | |
12627 | { | |
12628 | /* Consume the `[' token. */ | |
12629 | cp_lexer_consume_token (parser->lexer); | |
12630 | /* Read the operand name. */ | |
12631 | name = cp_parser_identifier (parser); | |
12632 | if (name != error_mark_node) | |
12633 | name = build_string (IDENTIFIER_LENGTH (name), | |
12634 | IDENTIFIER_POINTER (name)); | |
12635 | /* Look for the closing `]'. */ | |
12636 | cp_parser_require (parser, CPP_CLOSE_SQUARE, "`]'"); | |
12637 | } | |
12638 | else | |
12639 | name = NULL_TREE; | |
12640 | /* Look for the string-literal. */ | |
12641 | token = cp_parser_require (parser, CPP_STRING, "string-literal"); | |
12642 | string_literal = token ? token->value : error_mark_node; | |
12643 | /* Look for the `('. */ | |
12644 | cp_parser_require (parser, CPP_OPEN_PAREN, "`('"); | |
12645 | /* Parse the expression. */ | |
12646 | expression = cp_parser_expression (parser); | |
12647 | /* Look for the `)'. */ | |
12648 | cp_parser_require (parser, CPP_CLOSE_PAREN, "`)'"); | |
12649 | /* Add this operand to the list. */ | |
12650 | asm_operands = tree_cons (build_tree_list (name, string_literal), | |
12651 | expression, | |
12652 | asm_operands); | |
12653 | /* If the next token is not a `,', there are no more | |
12654 | operands. */ | |
12655 | if (cp_lexer_next_token_is_not (parser->lexer, CPP_COMMA)) | |
12656 | break; | |
12657 | /* Consume the `,'. */ | |
12658 | cp_lexer_consume_token (parser->lexer); | |
12659 | } | |
12660 | ||
12661 | return nreverse (asm_operands); | |
12662 | } | |
12663 | ||
12664 | /* Parse an asm-clobber-list. | |
12665 | ||
12666 | asm-clobber-list: | |
12667 | string-literal | |
12668 | asm-clobber-list , string-literal | |
12669 | ||
12670 | Returns a TREE_LIST, indicating the clobbers in the order that they | |
12671 | appeared. The TREE_VALUE of each node is a STRING_CST. */ | |
12672 | ||
12673 | static tree | |
94edc4ab | 12674 | cp_parser_asm_clobber_list (cp_parser* parser) |
a723baf1 MM |
12675 | { |
12676 | tree clobbers = NULL_TREE; | |
12677 | ||
12678 | while (true) | |
12679 | { | |
12680 | cp_token *token; | |
12681 | tree string_literal; | |
12682 | ||
12683 | /* Look for the string literal. */ | |
12684 | token = cp_parser_require (parser, CPP_STRING, "string-literal"); | |
12685 | string_literal = token ? token->value : error_mark_node; | |
12686 | /* Add it to the list. */ | |
12687 | clobbers = tree_cons (NULL_TREE, string_literal, clobbers); | |
12688 | /* If the next token is not a `,', then the list is | |
12689 | complete. */ | |
12690 | if (cp_lexer_next_token_is_not (parser->lexer, CPP_COMMA)) | |
12691 | break; | |
12692 | /* Consume the `,' token. */ | |
12693 | cp_lexer_consume_token (parser->lexer); | |
12694 | } | |
12695 | ||
12696 | return clobbers; | |
12697 | } | |
12698 | ||
12699 | /* Parse an (optional) series of attributes. | |
12700 | ||
12701 | attributes: | |
12702 | attributes attribute | |
12703 | ||
12704 | attribute: | |
12705 | __attribute__ (( attribute-list [opt] )) | |
12706 | ||
12707 | The return value is as for cp_parser_attribute_list. */ | |
12708 | ||
12709 | static tree | |
94edc4ab | 12710 | cp_parser_attributes_opt (cp_parser* parser) |
a723baf1 MM |
12711 | { |
12712 | tree attributes = NULL_TREE; | |
12713 | ||
12714 | while (true) | |
12715 | { | |
12716 | cp_token *token; | |
12717 | tree attribute_list; | |
12718 | ||
12719 | /* Peek at the next token. */ | |
12720 | token = cp_lexer_peek_token (parser->lexer); | |
12721 | /* If it's not `__attribute__', then we're done. */ | |
12722 | if (token->keyword != RID_ATTRIBUTE) | |
12723 | break; | |
12724 | ||
12725 | /* Consume the `__attribute__' keyword. */ | |
12726 | cp_lexer_consume_token (parser->lexer); | |
12727 | /* Look for the two `(' tokens. */ | |
12728 | cp_parser_require (parser, CPP_OPEN_PAREN, "`('"); | |
12729 | cp_parser_require (parser, CPP_OPEN_PAREN, "`('"); | |
12730 | ||
12731 | /* Peek at the next token. */ | |
12732 | token = cp_lexer_peek_token (parser->lexer); | |
12733 | if (token->type != CPP_CLOSE_PAREN) | |
12734 | /* Parse the attribute-list. */ | |
12735 | attribute_list = cp_parser_attribute_list (parser); | |
12736 | else | |
12737 | /* If the next token is a `)', then there is no attribute | |
12738 | list. */ | |
12739 | attribute_list = NULL; | |
12740 | ||
12741 | /* Look for the two `)' tokens. */ | |
12742 | cp_parser_require (parser, CPP_CLOSE_PAREN, "`)'"); | |
12743 | cp_parser_require (parser, CPP_CLOSE_PAREN, "`)'"); | |
12744 | ||
12745 | /* Add these new attributes to the list. */ | |
12746 | attributes = chainon (attributes, attribute_list); | |
12747 | } | |
12748 | ||
12749 | return attributes; | |
12750 | } | |
12751 | ||
12752 | /* Parse an attribute-list. | |
12753 | ||
12754 | attribute-list: | |
12755 | attribute | |
12756 | attribute-list , attribute | |
12757 | ||
12758 | attribute: | |
12759 | identifier | |
12760 | identifier ( identifier ) | |
12761 | identifier ( identifier , expression-list ) | |
12762 | identifier ( expression-list ) | |
12763 | ||
12764 | Returns a TREE_LIST. Each node corresponds to an attribute. THe | |
12765 | TREE_PURPOSE of each node is the identifier indicating which | |
12766 | attribute is in use. The TREE_VALUE represents the arguments, if | |
12767 | any. */ | |
12768 | ||
12769 | static tree | |
94edc4ab | 12770 | cp_parser_attribute_list (cp_parser* parser) |
a723baf1 MM |
12771 | { |
12772 | tree attribute_list = NULL_TREE; | |
12773 | ||
12774 | while (true) | |
12775 | { | |
12776 | cp_token *token; | |
12777 | tree identifier; | |
12778 | tree attribute; | |
12779 | ||
12780 | /* Look for the identifier. We also allow keywords here; for | |
12781 | example `__attribute__ ((const))' is legal. */ | |
12782 | token = cp_lexer_peek_token (parser->lexer); | |
12783 | if (token->type != CPP_NAME | |
12784 | && token->type != CPP_KEYWORD) | |
12785 | return error_mark_node; | |
12786 | /* Consume the token. */ | |
12787 | token = cp_lexer_consume_token (parser->lexer); | |
12788 | ||
12789 | /* Save away the identifier that indicates which attribute this is. */ | |
12790 | identifier = token->value; | |
12791 | attribute = build_tree_list (identifier, NULL_TREE); | |
12792 | ||
12793 | /* Peek at the next token. */ | |
12794 | token = cp_lexer_peek_token (parser->lexer); | |
12795 | /* If it's an `(', then parse the attribute arguments. */ | |
12796 | if (token->type == CPP_OPEN_PAREN) | |
12797 | { | |
12798 | tree arguments; | |
a723baf1 | 12799 | |
39703eb9 MM |
12800 | arguments = (cp_parser_parenthesized_expression_list |
12801 | (parser, true, /*non_constant_p=*/NULL)); | |
a723baf1 MM |
12802 | /* Save the identifier and arguments away. */ |
12803 | TREE_VALUE (attribute) = arguments; | |
a723baf1 MM |
12804 | } |
12805 | ||
12806 | /* Add this attribute to the list. */ | |
12807 | TREE_CHAIN (attribute) = attribute_list; | |
12808 | attribute_list = attribute; | |
12809 | ||
12810 | /* Now, look for more attributes. */ | |
12811 | token = cp_lexer_peek_token (parser->lexer); | |
12812 | /* If the next token isn't a `,', we're done. */ | |
12813 | if (token->type != CPP_COMMA) | |
12814 | break; | |
12815 | ||
12816 | /* Consume the commma and keep going. */ | |
12817 | cp_lexer_consume_token (parser->lexer); | |
12818 | } | |
12819 | ||
12820 | /* We built up the list in reverse order. */ | |
12821 | return nreverse (attribute_list); | |
12822 | } | |
12823 | ||
12824 | /* Parse an optional `__extension__' keyword. Returns TRUE if it is | |
12825 | present, and FALSE otherwise. *SAVED_PEDANTIC is set to the | |
12826 | current value of the PEDANTIC flag, regardless of whether or not | |
12827 | the `__extension__' keyword is present. The caller is responsible | |
12828 | for restoring the value of the PEDANTIC flag. */ | |
12829 | ||
12830 | static bool | |
94edc4ab | 12831 | cp_parser_extension_opt (cp_parser* parser, int* saved_pedantic) |
a723baf1 MM |
12832 | { |
12833 | /* Save the old value of the PEDANTIC flag. */ | |
12834 | *saved_pedantic = pedantic; | |
12835 | ||
12836 | if (cp_lexer_next_token_is_keyword (parser->lexer, RID_EXTENSION)) | |
12837 | { | |
12838 | /* Consume the `__extension__' token. */ | |
12839 | cp_lexer_consume_token (parser->lexer); | |
12840 | /* We're not being pedantic while the `__extension__' keyword is | |
12841 | in effect. */ | |
12842 | pedantic = 0; | |
12843 | ||
12844 | return true; | |
12845 | } | |
12846 | ||
12847 | return false; | |
12848 | } | |
12849 | ||
12850 | /* Parse a label declaration. | |
12851 | ||
12852 | label-declaration: | |
12853 | __label__ label-declarator-seq ; | |
12854 | ||
12855 | label-declarator-seq: | |
12856 | identifier , label-declarator-seq | |
12857 | identifier */ | |
12858 | ||
12859 | static void | |
94edc4ab | 12860 | cp_parser_label_declaration (cp_parser* parser) |
a723baf1 MM |
12861 | { |
12862 | /* Look for the `__label__' keyword. */ | |
12863 | cp_parser_require_keyword (parser, RID_LABEL, "`__label__'"); | |
12864 | ||
12865 | while (true) | |
12866 | { | |
12867 | tree identifier; | |
12868 | ||
12869 | /* Look for an identifier. */ | |
12870 | identifier = cp_parser_identifier (parser); | |
12871 | /* Declare it as a lobel. */ | |
12872 | finish_label_decl (identifier); | |
12873 | /* If the next token is a `;', stop. */ | |
12874 | if (cp_lexer_next_token_is (parser->lexer, CPP_SEMICOLON)) | |
12875 | break; | |
12876 | /* Look for the `,' separating the label declarations. */ | |
12877 | cp_parser_require (parser, CPP_COMMA, "`,'"); | |
12878 | } | |
12879 | ||
12880 | /* Look for the final `;'. */ | |
12881 | cp_parser_require (parser, CPP_SEMICOLON, "`;'"); | |
12882 | } | |
12883 | ||
12884 | /* Support Functions */ | |
12885 | ||
12886 | /* Looks up NAME in the current scope, as given by PARSER->SCOPE. | |
12887 | NAME should have one of the representations used for an | |
12888 | id-expression. If NAME is the ERROR_MARK_NODE, the ERROR_MARK_NODE | |
12889 | is returned. If PARSER->SCOPE is a dependent type, then a | |
12890 | SCOPE_REF is returned. | |
12891 | ||
12892 | If NAME is a TEMPLATE_ID_EXPR, then it will be immediately | |
12893 | returned; the name was already resolved when the TEMPLATE_ID_EXPR | |
12894 | was formed. Abstractly, such entities should not be passed to this | |
12895 | function, because they do not need to be looked up, but it is | |
12896 | simpler to check for this special case here, rather than at the | |
12897 | call-sites. | |
12898 | ||
12899 | In cases not explicitly covered above, this function returns a | |
12900 | DECL, OVERLOAD, or baselink representing the result of the lookup. | |
12901 | If there was no entity with the indicated NAME, the ERROR_MARK_NODE | |
12902 | is returned. | |
12903 | ||
a723baf1 MM |
12904 | If IS_TYPE is TRUE, bindings that do not refer to types are |
12905 | ignored. | |
12906 | ||
eea9800f MM |
12907 | If IS_NAMESPACE is TRUE, bindings that do not refer to namespaces |
12908 | are ignored. | |
12909 | ||
a723baf1 MM |
12910 | If CHECK_DEPENDENCY is TRUE, names are not looked up in dependent |
12911 | types. */ | |
12912 | ||
12913 | static tree | |
8d241e0b | 12914 | cp_parser_lookup_name (cp_parser *parser, tree name, |
eea9800f | 12915 | bool is_type, bool is_namespace, bool check_dependency) |
a723baf1 MM |
12916 | { |
12917 | tree decl; | |
12918 | tree object_type = parser->context->object_type; | |
12919 | ||
12920 | /* Now that we have looked up the name, the OBJECT_TYPE (if any) is | |
12921 | no longer valid. Note that if we are parsing tentatively, and | |
12922 | the parse fails, OBJECT_TYPE will be automatically restored. */ | |
12923 | parser->context->object_type = NULL_TREE; | |
12924 | ||
12925 | if (name == error_mark_node) | |
12926 | return error_mark_node; | |
12927 | ||
12928 | /* A template-id has already been resolved; there is no lookup to | |
12929 | do. */ | |
12930 | if (TREE_CODE (name) == TEMPLATE_ID_EXPR) | |
12931 | return name; | |
12932 | if (BASELINK_P (name)) | |
12933 | { | |
12934 | my_friendly_assert ((TREE_CODE (BASELINK_FUNCTIONS (name)) | |
12935 | == TEMPLATE_ID_EXPR), | |
12936 | 20020909); | |
12937 | return name; | |
12938 | } | |
12939 | ||
12940 | /* A BIT_NOT_EXPR is used to represent a destructor. By this point, | |
12941 | it should already have been checked to make sure that the name | |
12942 | used matches the type being destroyed. */ | |
12943 | if (TREE_CODE (name) == BIT_NOT_EXPR) | |
12944 | { | |
12945 | tree type; | |
12946 | ||
12947 | /* Figure out to which type this destructor applies. */ | |
12948 | if (parser->scope) | |
12949 | type = parser->scope; | |
12950 | else if (object_type) | |
12951 | type = object_type; | |
12952 | else | |
12953 | type = current_class_type; | |
12954 | /* If that's not a class type, there is no destructor. */ | |
12955 | if (!type || !CLASS_TYPE_P (type)) | |
12956 | return error_mark_node; | |
12957 | /* If it was a class type, return the destructor. */ | |
12958 | return CLASSTYPE_DESTRUCTORS (type); | |
12959 | } | |
12960 | ||
12961 | /* By this point, the NAME should be an ordinary identifier. If | |
12962 | the id-expression was a qualified name, the qualifying scope is | |
12963 | stored in PARSER->SCOPE at this point. */ | |
12964 | my_friendly_assert (TREE_CODE (name) == IDENTIFIER_NODE, | |
12965 | 20000619); | |
12966 | ||
12967 | /* Perform the lookup. */ | |
12968 | if (parser->scope) | |
12969 | { | |
1fb3244a | 12970 | bool dependent_p; |
a723baf1 MM |
12971 | |
12972 | if (parser->scope == error_mark_node) | |
12973 | return error_mark_node; | |
12974 | ||
12975 | /* If the SCOPE is dependent, the lookup must be deferred until | |
12976 | the template is instantiated -- unless we are explicitly | |
12977 | looking up names in uninstantiated templates. Even then, we | |
12978 | cannot look up the name if the scope is not a class type; it | |
12979 | might, for example, be a template type parameter. */ | |
1fb3244a MM |
12980 | dependent_p = (TYPE_P (parser->scope) |
12981 | && !(parser->in_declarator_p | |
12982 | && currently_open_class (parser->scope)) | |
12983 | && dependent_type_p (parser->scope)); | |
a723baf1 | 12984 | if ((check_dependency || !CLASS_TYPE_P (parser->scope)) |
1fb3244a | 12985 | && dependent_p) |
a723baf1 MM |
12986 | { |
12987 | if (!is_type) | |
12988 | decl = build_nt (SCOPE_REF, parser->scope, name); | |
12989 | else | |
12990 | /* The resolution to Core Issue 180 says that `struct A::B' | |
12991 | should be considered a type-name, even if `A' is | |
12992 | dependent. */ | |
12993 | decl = TYPE_NAME (make_typename_type (parser->scope, | |
12994 | name, | |
12995 | /*complain=*/1)); | |
12996 | } | |
12997 | else | |
12998 | { | |
12999 | /* If PARSER->SCOPE is a dependent type, then it must be a | |
13000 | class type, and we must not be checking dependencies; | |
13001 | otherwise, we would have processed this lookup above. So | |
13002 | that PARSER->SCOPE is not considered a dependent base by | |
13003 | lookup_member, we must enter the scope here. */ | |
1fb3244a | 13004 | if (dependent_p) |
a723baf1 MM |
13005 | push_scope (parser->scope); |
13006 | /* If the PARSER->SCOPE is a a template specialization, it | |
13007 | may be instantiated during name lookup. In that case, | |
13008 | errors may be issued. Even if we rollback the current | |
13009 | tentative parse, those errors are valid. */ | |
5e08432e MM |
13010 | decl = lookup_qualified_name (parser->scope, name, is_type, |
13011 | /*complain=*/true); | |
1fb3244a | 13012 | if (dependent_p) |
a723baf1 MM |
13013 | pop_scope (parser->scope); |
13014 | } | |
13015 | parser->qualifying_scope = parser->scope; | |
13016 | parser->object_scope = NULL_TREE; | |
13017 | } | |
13018 | else if (object_type) | |
13019 | { | |
13020 | tree object_decl = NULL_TREE; | |
13021 | /* Look up the name in the scope of the OBJECT_TYPE, unless the | |
13022 | OBJECT_TYPE is not a class. */ | |
13023 | if (CLASS_TYPE_P (object_type)) | |
13024 | /* If the OBJECT_TYPE is a template specialization, it may | |
13025 | be instantiated during name lookup. In that case, errors | |
13026 | may be issued. Even if we rollback the current tentative | |
13027 | parse, those errors are valid. */ | |
13028 | object_decl = lookup_member (object_type, | |
13029 | name, | |
13030 | /*protect=*/0, is_type); | |
13031 | /* Look it up in the enclosing context, too. */ | |
13032 | decl = lookup_name_real (name, is_type, /*nonclass=*/0, | |
eea9800f | 13033 | is_namespace, |
a723baf1 MM |
13034 | /*flags=*/0); |
13035 | parser->object_scope = object_type; | |
13036 | parser->qualifying_scope = NULL_TREE; | |
13037 | if (object_decl) | |
13038 | decl = object_decl; | |
13039 | } | |
13040 | else | |
13041 | { | |
13042 | decl = lookup_name_real (name, is_type, /*nonclass=*/0, | |
eea9800f | 13043 | is_namespace, |
a723baf1 MM |
13044 | /*flags=*/0); |
13045 | parser->qualifying_scope = NULL_TREE; | |
13046 | parser->object_scope = NULL_TREE; | |
13047 | } | |
13048 | ||
13049 | /* If the lookup failed, let our caller know. */ | |
13050 | if (!decl | |
13051 | || decl == error_mark_node | |
13052 | || (TREE_CODE (decl) == FUNCTION_DECL | |
13053 | && DECL_ANTICIPATED (decl))) | |
13054 | return error_mark_node; | |
13055 | ||
13056 | /* If it's a TREE_LIST, the result of the lookup was ambiguous. */ | |
13057 | if (TREE_CODE (decl) == TREE_LIST) | |
13058 | { | |
13059 | /* The error message we have to print is too complicated for | |
13060 | cp_parser_error, so we incorporate its actions directly. */ | |
e5976695 | 13061 | if (!cp_parser_simulate_error (parser)) |
a723baf1 MM |
13062 | { |
13063 | error ("reference to `%D' is ambiguous", name); | |
13064 | print_candidates (decl); | |
13065 | } | |
13066 | return error_mark_node; | |
13067 | } | |
13068 | ||
13069 | my_friendly_assert (DECL_P (decl) | |
13070 | || TREE_CODE (decl) == OVERLOAD | |
13071 | || TREE_CODE (decl) == SCOPE_REF | |
13072 | || BASELINK_P (decl), | |
13073 | 20000619); | |
13074 | ||
13075 | /* If we have resolved the name of a member declaration, check to | |
13076 | see if the declaration is accessible. When the name resolves to | |
34cd5ae7 | 13077 | set of overloaded functions, accessibility is checked when |
a723baf1 MM |
13078 | overload resolution is done. |
13079 | ||
13080 | During an explicit instantiation, access is not checked at all, | |
13081 | as per [temp.explicit]. */ | |
8d241e0b | 13082 | if (DECL_P (decl)) |
ee76b931 | 13083 | check_accessibility_of_qualified_id (decl, object_type, parser->scope); |
a723baf1 MM |
13084 | |
13085 | return decl; | |
13086 | } | |
13087 | ||
13088 | /* Like cp_parser_lookup_name, but for use in the typical case where | |
13089 | CHECK_ACCESS is TRUE, IS_TYPE is FALSE, and CHECK_DEPENDENCY is | |
13090 | TRUE. */ | |
13091 | ||
13092 | static tree | |
94edc4ab | 13093 | cp_parser_lookup_name_simple (cp_parser* parser, tree name) |
a723baf1 MM |
13094 | { |
13095 | return cp_parser_lookup_name (parser, name, | |
eea9800f MM |
13096 | /*is_type=*/false, |
13097 | /*is_namespace=*/false, | |
a723baf1 MM |
13098 | /*check_dependency=*/true); |
13099 | } | |
13100 | ||
a723baf1 MM |
13101 | /* If DECL is a TEMPLATE_DECL that can be treated like a TYPE_DECL in |
13102 | the current context, return the TYPE_DECL. If TAG_NAME_P is | |
13103 | true, the DECL indicates the class being defined in a class-head, | |
13104 | or declared in an elaborated-type-specifier. | |
13105 | ||
13106 | Otherwise, return DECL. */ | |
13107 | ||
13108 | static tree | |
13109 | cp_parser_maybe_treat_template_as_class (tree decl, bool tag_name_p) | |
13110 | { | |
710b73e6 KL |
13111 | /* If the TEMPLATE_DECL is being declared as part of a class-head, |
13112 | the translation from TEMPLATE_DECL to TYPE_DECL occurs: | |
a723baf1 MM |
13113 | |
13114 | struct A { | |
13115 | template <typename T> struct B; | |
13116 | }; | |
13117 | ||
13118 | template <typename T> struct A::B {}; | |
13119 | ||
13120 | Similarly, in a elaborated-type-specifier: | |
13121 | ||
13122 | namespace N { struct X{}; } | |
13123 | ||
13124 | struct A { | |
13125 | template <typename T> friend struct N::X; | |
13126 | }; | |
13127 | ||
710b73e6 KL |
13128 | However, if the DECL refers to a class type, and we are in |
13129 | the scope of the class, then the name lookup automatically | |
13130 | finds the TYPE_DECL created by build_self_reference rather | |
13131 | than a TEMPLATE_DECL. For example, in: | |
13132 | ||
13133 | template <class T> struct S { | |
13134 | S s; | |
13135 | }; | |
13136 | ||
13137 | there is no need to handle such case. */ | |
13138 | ||
13139 | if (DECL_CLASS_TEMPLATE_P (decl) && tag_name_p) | |
a723baf1 MM |
13140 | return DECL_TEMPLATE_RESULT (decl); |
13141 | ||
13142 | return decl; | |
13143 | } | |
13144 | ||
13145 | /* If too many, or too few, template-parameter lists apply to the | |
13146 | declarator, issue an error message. Returns TRUE if all went well, | |
13147 | and FALSE otherwise. */ | |
13148 | ||
13149 | static bool | |
94edc4ab NN |
13150 | cp_parser_check_declarator_template_parameters (cp_parser* parser, |
13151 | tree declarator) | |
a723baf1 MM |
13152 | { |
13153 | unsigned num_templates; | |
13154 | ||
13155 | /* We haven't seen any classes that involve template parameters yet. */ | |
13156 | num_templates = 0; | |
13157 | ||
13158 | switch (TREE_CODE (declarator)) | |
13159 | { | |
13160 | case CALL_EXPR: | |
13161 | case ARRAY_REF: | |
13162 | case INDIRECT_REF: | |
13163 | case ADDR_EXPR: | |
13164 | { | |
13165 | tree main_declarator = TREE_OPERAND (declarator, 0); | |
13166 | return | |
13167 | cp_parser_check_declarator_template_parameters (parser, | |
13168 | main_declarator); | |
13169 | } | |
13170 | ||
13171 | case SCOPE_REF: | |
13172 | { | |
13173 | tree scope; | |
13174 | tree member; | |
13175 | ||
13176 | scope = TREE_OPERAND (declarator, 0); | |
13177 | member = TREE_OPERAND (declarator, 1); | |
13178 | ||
13179 | /* If this is a pointer-to-member, then we are not interested | |
13180 | in the SCOPE, because it does not qualify the thing that is | |
13181 | being declared. */ | |
13182 | if (TREE_CODE (member) == INDIRECT_REF) | |
13183 | return (cp_parser_check_declarator_template_parameters | |
13184 | (parser, member)); | |
13185 | ||
13186 | while (scope && CLASS_TYPE_P (scope)) | |
13187 | { | |
13188 | /* You're supposed to have one `template <...>' | |
13189 | for every template class, but you don't need one | |
13190 | for a full specialization. For example: | |
13191 | ||
13192 | template <class T> struct S{}; | |
13193 | template <> struct S<int> { void f(); }; | |
13194 | void S<int>::f () {} | |
13195 | ||
13196 | is correct; there shouldn't be a `template <>' for | |
13197 | the definition of `S<int>::f'. */ | |
13198 | if (CLASSTYPE_TEMPLATE_INFO (scope) | |
13199 | && (CLASSTYPE_TEMPLATE_INSTANTIATION (scope) | |
13200 | || uses_template_parms (CLASSTYPE_TI_ARGS (scope))) | |
13201 | && PRIMARY_TEMPLATE_P (CLASSTYPE_TI_TEMPLATE (scope))) | |
13202 | ++num_templates; | |
13203 | ||
13204 | scope = TYPE_CONTEXT (scope); | |
13205 | } | |
13206 | } | |
13207 | ||
13208 | /* Fall through. */ | |
13209 | ||
13210 | default: | |
13211 | /* If the DECLARATOR has the form `X<y>' then it uses one | |
13212 | additional level of template parameters. */ | |
13213 | if (TREE_CODE (declarator) == TEMPLATE_ID_EXPR) | |
13214 | ++num_templates; | |
13215 | ||
13216 | return cp_parser_check_template_parameters (parser, | |
13217 | num_templates); | |
13218 | } | |
13219 | } | |
13220 | ||
13221 | /* NUM_TEMPLATES were used in the current declaration. If that is | |
13222 | invalid, return FALSE and issue an error messages. Otherwise, | |
13223 | return TRUE. */ | |
13224 | ||
13225 | static bool | |
94edc4ab NN |
13226 | cp_parser_check_template_parameters (cp_parser* parser, |
13227 | unsigned num_templates) | |
a723baf1 MM |
13228 | { |
13229 | /* If there are more template classes than parameter lists, we have | |
13230 | something like: | |
13231 | ||
13232 | template <class T> void S<T>::R<T>::f (); */ | |
13233 | if (parser->num_template_parameter_lists < num_templates) | |
13234 | { | |
13235 | error ("too few template-parameter-lists"); | |
13236 | return false; | |
13237 | } | |
13238 | /* If there are the same number of template classes and parameter | |
13239 | lists, that's OK. */ | |
13240 | if (parser->num_template_parameter_lists == num_templates) | |
13241 | return true; | |
13242 | /* If there are more, but only one more, then we are referring to a | |
13243 | member template. That's OK too. */ | |
13244 | if (parser->num_template_parameter_lists == num_templates + 1) | |
13245 | return true; | |
13246 | /* Otherwise, there are too many template parameter lists. We have | |
13247 | something like: | |
13248 | ||
13249 | template <class T> template <class U> void S::f(); */ | |
13250 | error ("too many template-parameter-lists"); | |
13251 | return false; | |
13252 | } | |
13253 | ||
13254 | /* Parse a binary-expression of the general form: | |
13255 | ||
13256 | binary-expression: | |
13257 | <expr> | |
13258 | binary-expression <token> <expr> | |
13259 | ||
13260 | The TOKEN_TREE_MAP maps <token> types to <expr> codes. FN is used | |
13261 | to parser the <expr>s. If the first production is used, then the | |
13262 | value returned by FN is returned directly. Otherwise, a node with | |
13263 | the indicated EXPR_TYPE is returned, with operands corresponding to | |
13264 | the two sub-expressions. */ | |
13265 | ||
13266 | static tree | |
94edc4ab NN |
13267 | cp_parser_binary_expression (cp_parser* parser, |
13268 | const cp_parser_token_tree_map token_tree_map, | |
13269 | cp_parser_expression_fn fn) | |
a723baf1 MM |
13270 | { |
13271 | tree lhs; | |
13272 | ||
13273 | /* Parse the first expression. */ | |
13274 | lhs = (*fn) (parser); | |
13275 | /* Now, look for more expressions. */ | |
13276 | while (true) | |
13277 | { | |
13278 | cp_token *token; | |
39b1af70 | 13279 | const cp_parser_token_tree_map_node *map_node; |
a723baf1 MM |
13280 | tree rhs; |
13281 | ||
13282 | /* Peek at the next token. */ | |
13283 | token = cp_lexer_peek_token (parser->lexer); | |
13284 | /* If the token is `>', and that's not an operator at the | |
13285 | moment, then we're done. */ | |
13286 | if (token->type == CPP_GREATER | |
13287 | && !parser->greater_than_is_operator_p) | |
13288 | break; | |
34cd5ae7 | 13289 | /* If we find one of the tokens we want, build the corresponding |
a723baf1 MM |
13290 | tree representation. */ |
13291 | for (map_node = token_tree_map; | |
13292 | map_node->token_type != CPP_EOF; | |
13293 | ++map_node) | |
13294 | if (map_node->token_type == token->type) | |
13295 | { | |
13296 | /* Consume the operator token. */ | |
13297 | cp_lexer_consume_token (parser->lexer); | |
13298 | /* Parse the right-hand side of the expression. */ | |
13299 | rhs = (*fn) (parser); | |
13300 | /* Build the binary tree node. */ | |
13301 | lhs = build_x_binary_op (map_node->tree_type, lhs, rhs); | |
13302 | break; | |
13303 | } | |
13304 | ||
13305 | /* If the token wasn't one of the ones we want, we're done. */ | |
13306 | if (map_node->token_type == CPP_EOF) | |
13307 | break; | |
13308 | } | |
13309 | ||
13310 | return lhs; | |
13311 | } | |
13312 | ||
13313 | /* Parse an optional `::' token indicating that the following name is | |
13314 | from the global namespace. If so, PARSER->SCOPE is set to the | |
13315 | GLOBAL_NAMESPACE. Otherwise, PARSER->SCOPE is set to NULL_TREE, | |
13316 | unless CURRENT_SCOPE_VALID_P is TRUE, in which case it is left alone. | |
13317 | Returns the new value of PARSER->SCOPE, if the `::' token is | |
13318 | present, and NULL_TREE otherwise. */ | |
13319 | ||
13320 | static tree | |
94edc4ab | 13321 | cp_parser_global_scope_opt (cp_parser* parser, bool current_scope_valid_p) |
a723baf1 MM |
13322 | { |
13323 | cp_token *token; | |
13324 | ||
13325 | /* Peek at the next token. */ | |
13326 | token = cp_lexer_peek_token (parser->lexer); | |
13327 | /* If we're looking at a `::' token then we're starting from the | |
13328 | global namespace, not our current location. */ | |
13329 | if (token->type == CPP_SCOPE) | |
13330 | { | |
13331 | /* Consume the `::' token. */ | |
13332 | cp_lexer_consume_token (parser->lexer); | |
13333 | /* Set the SCOPE so that we know where to start the lookup. */ | |
13334 | parser->scope = global_namespace; | |
13335 | parser->qualifying_scope = global_namespace; | |
13336 | parser->object_scope = NULL_TREE; | |
13337 | ||
13338 | return parser->scope; | |
13339 | } | |
13340 | else if (!current_scope_valid_p) | |
13341 | { | |
13342 | parser->scope = NULL_TREE; | |
13343 | parser->qualifying_scope = NULL_TREE; | |
13344 | parser->object_scope = NULL_TREE; | |
13345 | } | |
13346 | ||
13347 | return NULL_TREE; | |
13348 | } | |
13349 | ||
13350 | /* Returns TRUE if the upcoming token sequence is the start of a | |
13351 | constructor declarator. If FRIEND_P is true, the declarator is | |
13352 | preceded by the `friend' specifier. */ | |
13353 | ||
13354 | static bool | |
13355 | cp_parser_constructor_declarator_p (cp_parser *parser, bool friend_p) | |
13356 | { | |
13357 | bool constructor_p; | |
13358 | tree type_decl = NULL_TREE; | |
13359 | bool nested_name_p; | |
2050a1bb MM |
13360 | cp_token *next_token; |
13361 | ||
13362 | /* The common case is that this is not a constructor declarator, so | |
8fbc5ae7 MM |
13363 | try to avoid doing lots of work if at all possible. It's not |
13364 | valid declare a constructor at function scope. */ | |
13365 | if (at_function_scope_p ()) | |
13366 | return false; | |
13367 | /* And only certain tokens can begin a constructor declarator. */ | |
2050a1bb MM |
13368 | next_token = cp_lexer_peek_token (parser->lexer); |
13369 | if (next_token->type != CPP_NAME | |
13370 | && next_token->type != CPP_SCOPE | |
13371 | && next_token->type != CPP_NESTED_NAME_SPECIFIER | |
13372 | && next_token->type != CPP_TEMPLATE_ID) | |
13373 | return false; | |
a723baf1 MM |
13374 | |
13375 | /* Parse tentatively; we are going to roll back all of the tokens | |
13376 | consumed here. */ | |
13377 | cp_parser_parse_tentatively (parser); | |
13378 | /* Assume that we are looking at a constructor declarator. */ | |
13379 | constructor_p = true; | |
8d241e0b | 13380 | |
a723baf1 MM |
13381 | /* Look for the optional `::' operator. */ |
13382 | cp_parser_global_scope_opt (parser, | |
13383 | /*current_scope_valid_p=*/false); | |
13384 | /* Look for the nested-name-specifier. */ | |
13385 | nested_name_p | |
13386 | = (cp_parser_nested_name_specifier_opt (parser, | |
13387 | /*typename_keyword_p=*/false, | |
13388 | /*check_dependency_p=*/false, | |
13389 | /*type_p=*/false) | |
13390 | != NULL_TREE); | |
13391 | /* Outside of a class-specifier, there must be a | |
13392 | nested-name-specifier. */ | |
13393 | if (!nested_name_p && | |
13394 | (!at_class_scope_p () || !TYPE_BEING_DEFINED (current_class_type) | |
13395 | || friend_p)) | |
13396 | constructor_p = false; | |
13397 | /* If we still think that this might be a constructor-declarator, | |
13398 | look for a class-name. */ | |
13399 | if (constructor_p) | |
13400 | { | |
13401 | /* If we have: | |
13402 | ||
8fbc5ae7 | 13403 | template <typename T> struct S { S(); }; |
a723baf1 MM |
13404 | template <typename T> S<T>::S (); |
13405 | ||
13406 | we must recognize that the nested `S' names a class. | |
13407 | Similarly, for: | |
13408 | ||
13409 | template <typename T> S<T>::S<T> (); | |
13410 | ||
13411 | we must recognize that the nested `S' names a template. */ | |
13412 | type_decl = cp_parser_class_name (parser, | |
13413 | /*typename_keyword_p=*/false, | |
13414 | /*template_keyword_p=*/false, | |
13415 | /*type_p=*/false, | |
a723baf1 MM |
13416 | /*check_dependency_p=*/false, |
13417 | /*class_head_p=*/false); | |
13418 | /* If there was no class-name, then this is not a constructor. */ | |
13419 | constructor_p = !cp_parser_error_occurred (parser); | |
13420 | } | |
8d241e0b | 13421 | |
a723baf1 MM |
13422 | /* If we're still considering a constructor, we have to see a `(', |
13423 | to begin the parameter-declaration-clause, followed by either a | |
13424 | `)', an `...', or a decl-specifier. We need to check for a | |
13425 | type-specifier to avoid being fooled into thinking that: | |
13426 | ||
13427 | S::S (f) (int); | |
13428 | ||
13429 | is a constructor. (It is actually a function named `f' that | |
13430 | takes one parameter (of type `int') and returns a value of type | |
13431 | `S::S'. */ | |
13432 | if (constructor_p | |
13433 | && cp_parser_require (parser, CPP_OPEN_PAREN, "`('")) | |
13434 | { | |
13435 | if (cp_lexer_next_token_is_not (parser->lexer, CPP_CLOSE_PAREN) | |
13436 | && cp_lexer_next_token_is_not (parser->lexer, CPP_ELLIPSIS) | |
13437 | && !cp_parser_storage_class_specifier_opt (parser)) | |
13438 | { | |
5dae1114 MM |
13439 | tree type; |
13440 | ||
13441 | /* Names appearing in the type-specifier should be looked up | |
13442 | in the scope of the class. */ | |
13443 | if (current_class_type) | |
13444 | type = NULL_TREE; | |
a723baf1 MM |
13445 | else |
13446 | { | |
5dae1114 MM |
13447 | type = TREE_TYPE (type_decl); |
13448 | if (TREE_CODE (type) == TYPENAME_TYPE) | |
14d22dd6 MM |
13449 | { |
13450 | type = resolve_typename_type (type, | |
13451 | /*only_current_p=*/false); | |
13452 | if (type == error_mark_node) | |
13453 | { | |
13454 | cp_parser_abort_tentative_parse (parser); | |
13455 | return false; | |
13456 | } | |
13457 | } | |
5dae1114 | 13458 | push_scope (type); |
a723baf1 | 13459 | } |
5dae1114 MM |
13460 | /* Look for the type-specifier. */ |
13461 | cp_parser_type_specifier (parser, | |
13462 | CP_PARSER_FLAGS_NONE, | |
13463 | /*is_friend=*/false, | |
13464 | /*is_declarator=*/true, | |
13465 | /*declares_class_or_enum=*/NULL, | |
13466 | /*is_cv_qualifier=*/NULL); | |
13467 | /* Leave the scope of the class. */ | |
13468 | if (type) | |
13469 | pop_scope (type); | |
13470 | ||
13471 | constructor_p = !cp_parser_error_occurred (parser); | |
a723baf1 MM |
13472 | } |
13473 | } | |
13474 | else | |
13475 | constructor_p = false; | |
13476 | /* We did not really want to consume any tokens. */ | |
13477 | cp_parser_abort_tentative_parse (parser); | |
13478 | ||
13479 | return constructor_p; | |
13480 | } | |
13481 | ||
13482 | /* Parse the definition of the function given by the DECL_SPECIFIERS, | |
cf22909c | 13483 | ATTRIBUTES, and DECLARATOR. The access checks have been deferred; |
a723baf1 MM |
13484 | they must be performed once we are in the scope of the function. |
13485 | ||
13486 | Returns the function defined. */ | |
13487 | ||
13488 | static tree | |
13489 | cp_parser_function_definition_from_specifiers_and_declarator | |
94edc4ab NN |
13490 | (cp_parser* parser, |
13491 | tree decl_specifiers, | |
13492 | tree attributes, | |
13493 | tree declarator) | |
a723baf1 MM |
13494 | { |
13495 | tree fn; | |
13496 | bool success_p; | |
13497 | ||
13498 | /* Begin the function-definition. */ | |
13499 | success_p = begin_function_definition (decl_specifiers, | |
13500 | attributes, | |
13501 | declarator); | |
13502 | ||
13503 | /* If there were names looked up in the decl-specifier-seq that we | |
13504 | did not check, check them now. We must wait until we are in the | |
13505 | scope of the function to perform the checks, since the function | |
13506 | might be a friend. */ | |
cf22909c | 13507 | perform_deferred_access_checks (); |
a723baf1 MM |
13508 | |
13509 | if (!success_p) | |
13510 | { | |
13511 | /* If begin_function_definition didn't like the definition, skip | |
13512 | the entire function. */ | |
13513 | error ("invalid function declaration"); | |
13514 | cp_parser_skip_to_end_of_block_or_statement (parser); | |
13515 | fn = error_mark_node; | |
13516 | } | |
13517 | else | |
13518 | fn = cp_parser_function_definition_after_declarator (parser, | |
13519 | /*inline_p=*/false); | |
13520 | ||
13521 | return fn; | |
13522 | } | |
13523 | ||
13524 | /* Parse the part of a function-definition that follows the | |
13525 | declarator. INLINE_P is TRUE iff this function is an inline | |
13526 | function defined with a class-specifier. | |
13527 | ||
13528 | Returns the function defined. */ | |
13529 | ||
13530 | static tree | |
94edc4ab NN |
13531 | cp_parser_function_definition_after_declarator (cp_parser* parser, |
13532 | bool inline_p) | |
a723baf1 MM |
13533 | { |
13534 | tree fn; | |
13535 | bool ctor_initializer_p = false; | |
13536 | bool saved_in_unbraced_linkage_specification_p; | |
13537 | unsigned saved_num_template_parameter_lists; | |
13538 | ||
13539 | /* If the next token is `return', then the code may be trying to | |
13540 | make use of the "named return value" extension that G++ used to | |
13541 | support. */ | |
13542 | if (cp_lexer_next_token_is_keyword (parser->lexer, RID_RETURN)) | |
13543 | { | |
13544 | /* Consume the `return' keyword. */ | |
13545 | cp_lexer_consume_token (parser->lexer); | |
13546 | /* Look for the identifier that indicates what value is to be | |
13547 | returned. */ | |
13548 | cp_parser_identifier (parser); | |
13549 | /* Issue an error message. */ | |
13550 | error ("named return values are no longer supported"); | |
13551 | /* Skip tokens until we reach the start of the function body. */ | |
13552 | while (cp_lexer_next_token_is_not (parser->lexer, CPP_OPEN_BRACE)) | |
13553 | cp_lexer_consume_token (parser->lexer); | |
13554 | } | |
13555 | /* The `extern' in `extern "C" void f () { ... }' does not apply to | |
13556 | anything declared inside `f'. */ | |
13557 | saved_in_unbraced_linkage_specification_p | |
13558 | = parser->in_unbraced_linkage_specification_p; | |
13559 | parser->in_unbraced_linkage_specification_p = false; | |
13560 | /* Inside the function, surrounding template-parameter-lists do not | |
13561 | apply. */ | |
13562 | saved_num_template_parameter_lists | |
13563 | = parser->num_template_parameter_lists; | |
13564 | parser->num_template_parameter_lists = 0; | |
13565 | /* If the next token is `try', then we are looking at a | |
13566 | function-try-block. */ | |
13567 | if (cp_lexer_next_token_is_keyword (parser->lexer, RID_TRY)) | |
13568 | ctor_initializer_p = cp_parser_function_try_block (parser); | |
13569 | /* A function-try-block includes the function-body, so we only do | |
13570 | this next part if we're not processing a function-try-block. */ | |
13571 | else | |
13572 | ctor_initializer_p | |
13573 | = cp_parser_ctor_initializer_opt_and_function_body (parser); | |
13574 | ||
13575 | /* Finish the function. */ | |
13576 | fn = finish_function ((ctor_initializer_p ? 1 : 0) | | |
13577 | (inline_p ? 2 : 0)); | |
13578 | /* Generate code for it, if necessary. */ | |
8cd2462c | 13579 | expand_or_defer_fn (fn); |
a723baf1 MM |
13580 | /* Restore the saved values. */ |
13581 | parser->in_unbraced_linkage_specification_p | |
13582 | = saved_in_unbraced_linkage_specification_p; | |
13583 | parser->num_template_parameter_lists | |
13584 | = saved_num_template_parameter_lists; | |
13585 | ||
13586 | return fn; | |
13587 | } | |
13588 | ||
13589 | /* Parse a template-declaration, assuming that the `export' (and | |
13590 | `extern') keywords, if present, has already been scanned. MEMBER_P | |
13591 | is as for cp_parser_template_declaration. */ | |
13592 | ||
13593 | static void | |
94edc4ab | 13594 | cp_parser_template_declaration_after_export (cp_parser* parser, bool member_p) |
a723baf1 MM |
13595 | { |
13596 | tree decl = NULL_TREE; | |
13597 | tree parameter_list; | |
13598 | bool friend_p = false; | |
13599 | ||
13600 | /* Look for the `template' keyword. */ | |
13601 | if (!cp_parser_require_keyword (parser, RID_TEMPLATE, "`template'")) | |
13602 | return; | |
13603 | ||
13604 | /* And the `<'. */ | |
13605 | if (!cp_parser_require (parser, CPP_LESS, "`<'")) | |
13606 | return; | |
13607 | ||
13608 | /* Parse the template parameters. */ | |
13609 | begin_template_parm_list (); | |
13610 | /* If the next token is `>', then we have an invalid | |
13611 | specialization. Rather than complain about an invalid template | |
13612 | parameter, issue an error message here. */ | |
13613 | if (cp_lexer_next_token_is (parser->lexer, CPP_GREATER)) | |
13614 | { | |
13615 | cp_parser_error (parser, "invalid explicit specialization"); | |
13616 | parameter_list = NULL_TREE; | |
13617 | } | |
13618 | else | |
13619 | parameter_list = cp_parser_template_parameter_list (parser); | |
13620 | parameter_list = end_template_parm_list (parameter_list); | |
13621 | /* Look for the `>'. */ | |
13622 | cp_parser_skip_until_found (parser, CPP_GREATER, "`>'"); | |
13623 | /* We just processed one more parameter list. */ | |
13624 | ++parser->num_template_parameter_lists; | |
13625 | /* If the next token is `template', there are more template | |
13626 | parameters. */ | |
13627 | if (cp_lexer_next_token_is_keyword (parser->lexer, | |
13628 | RID_TEMPLATE)) | |
13629 | cp_parser_template_declaration_after_export (parser, member_p); | |
13630 | else | |
13631 | { | |
13632 | decl = cp_parser_single_declaration (parser, | |
13633 | member_p, | |
13634 | &friend_p); | |
13635 | ||
13636 | /* If this is a member template declaration, let the front | |
13637 | end know. */ | |
13638 | if (member_p && !friend_p && decl) | |
13639 | decl = finish_member_template_decl (decl); | |
13640 | else if (friend_p && decl && TREE_CODE (decl) == TYPE_DECL) | |
19db77ce KL |
13641 | make_friend_class (current_class_type, TREE_TYPE (decl), |
13642 | /*complain=*/true); | |
a723baf1 MM |
13643 | } |
13644 | /* We are done with the current parameter list. */ | |
13645 | --parser->num_template_parameter_lists; | |
13646 | ||
13647 | /* Finish up. */ | |
13648 | finish_template_decl (parameter_list); | |
13649 | ||
13650 | /* Register member declarations. */ | |
13651 | if (member_p && !friend_p && decl && !DECL_CLASS_TEMPLATE_P (decl)) | |
13652 | finish_member_declaration (decl); | |
13653 | ||
13654 | /* If DECL is a function template, we must return to parse it later. | |
13655 | (Even though there is no definition, there might be default | |
13656 | arguments that need handling.) */ | |
13657 | if (member_p && decl | |
13658 | && (TREE_CODE (decl) == FUNCTION_DECL | |
13659 | || DECL_FUNCTION_TEMPLATE_P (decl))) | |
13660 | TREE_VALUE (parser->unparsed_functions_queues) | |
8218bd34 | 13661 | = tree_cons (NULL_TREE, decl, |
a723baf1 MM |
13662 | TREE_VALUE (parser->unparsed_functions_queues)); |
13663 | } | |
13664 | ||
13665 | /* Parse a `decl-specifier-seq [opt] init-declarator [opt] ;' or | |
13666 | `function-definition' sequence. MEMBER_P is true, this declaration | |
13667 | appears in a class scope. | |
13668 | ||
13669 | Returns the DECL for the declared entity. If FRIEND_P is non-NULL, | |
13670 | *FRIEND_P is set to TRUE iff the declaration is a friend. */ | |
13671 | ||
13672 | static tree | |
94edc4ab NN |
13673 | cp_parser_single_declaration (cp_parser* parser, |
13674 | bool member_p, | |
13675 | bool* friend_p) | |
a723baf1 | 13676 | { |
560ad596 | 13677 | int declares_class_or_enum; |
a723baf1 MM |
13678 | tree decl = NULL_TREE; |
13679 | tree decl_specifiers; | |
13680 | tree attributes; | |
a723baf1 MM |
13681 | |
13682 | /* Parse the dependent declaration. We don't know yet | |
13683 | whether it will be a function-definition. */ | |
13684 | cp_parser_parse_tentatively (parser); | |
13685 | /* Defer access checks until we know what is being declared. */ | |
8d241e0b | 13686 | push_deferring_access_checks (dk_deferred); |
cf22909c | 13687 | |
a723baf1 MM |
13688 | /* Try the `decl-specifier-seq [opt] init-declarator [opt]' |
13689 | alternative. */ | |
13690 | decl_specifiers | |
13691 | = cp_parser_decl_specifier_seq (parser, | |
13692 | CP_PARSER_FLAGS_OPTIONAL, | |
13693 | &attributes, | |
13694 | &declares_class_or_enum); | |
13695 | /* Gather up the access checks that occurred the | |
13696 | decl-specifier-seq. */ | |
cf22909c KL |
13697 | stop_deferring_access_checks (); |
13698 | ||
a723baf1 MM |
13699 | /* Check for the declaration of a template class. */ |
13700 | if (declares_class_or_enum) | |
13701 | { | |
13702 | if (cp_parser_declares_only_class_p (parser)) | |
13703 | { | |
13704 | decl = shadow_tag (decl_specifiers); | |
13705 | if (decl) | |
13706 | decl = TYPE_NAME (decl); | |
13707 | else | |
13708 | decl = error_mark_node; | |
13709 | } | |
13710 | } | |
13711 | else | |
13712 | decl = NULL_TREE; | |
13713 | /* If it's not a template class, try for a template function. If | |
13714 | the next token is a `;', then this declaration does not declare | |
13715 | anything. But, if there were errors in the decl-specifiers, then | |
13716 | the error might well have come from an attempted class-specifier. | |
13717 | In that case, there's no need to warn about a missing declarator. */ | |
13718 | if (!decl | |
13719 | && (cp_lexer_next_token_is_not (parser->lexer, CPP_SEMICOLON) | |
13720 | || !value_member (error_mark_node, decl_specifiers))) | |
13721 | decl = cp_parser_init_declarator (parser, | |
13722 | decl_specifiers, | |
13723 | attributes, | |
a723baf1 MM |
13724 | /*function_definition_allowed_p=*/false, |
13725 | member_p, | |
560ad596 | 13726 | declares_class_or_enum, |
a723baf1 | 13727 | /*function_definition_p=*/NULL); |
cf22909c KL |
13728 | |
13729 | pop_deferring_access_checks (); | |
13730 | ||
a723baf1 MM |
13731 | /* Clear any current qualification; whatever comes next is the start |
13732 | of something new. */ | |
13733 | parser->scope = NULL_TREE; | |
13734 | parser->qualifying_scope = NULL_TREE; | |
13735 | parser->object_scope = NULL_TREE; | |
13736 | /* Look for a trailing `;' after the declaration. */ | |
8a6393df | 13737 | if (!cp_parser_require (parser, CPP_SEMICOLON, "`;'") |
a723baf1 MM |
13738 | && cp_parser_committed_to_tentative_parse (parser)) |
13739 | cp_parser_skip_to_end_of_block_or_statement (parser); | |
13740 | /* If it worked, set *FRIEND_P based on the DECL_SPECIFIERS. */ | |
13741 | if (cp_parser_parse_definitely (parser)) | |
13742 | { | |
13743 | if (friend_p) | |
13744 | *friend_p = cp_parser_friend_p (decl_specifiers); | |
13745 | } | |
13746 | /* Otherwise, try a function-definition. */ | |
13747 | else | |
13748 | decl = cp_parser_function_definition (parser, friend_p); | |
13749 | ||
13750 | return decl; | |
13751 | } | |
13752 | ||
d6b4ea85 MM |
13753 | /* Parse a cast-expression that is not the operand of a unary "&". */ |
13754 | ||
13755 | static tree | |
13756 | cp_parser_simple_cast_expression (cp_parser *parser) | |
13757 | { | |
13758 | return cp_parser_cast_expression (parser, /*address_p=*/false); | |
13759 | } | |
13760 | ||
a723baf1 MM |
13761 | /* Parse a functional cast to TYPE. Returns an expression |
13762 | representing the cast. */ | |
13763 | ||
13764 | static tree | |
94edc4ab | 13765 | cp_parser_functional_cast (cp_parser* parser, tree type) |
a723baf1 MM |
13766 | { |
13767 | tree expression_list; | |
13768 | ||
39703eb9 MM |
13769 | expression_list |
13770 | = cp_parser_parenthesized_expression_list (parser, false, | |
13771 | /*non_constant_p=*/NULL); | |
a723baf1 MM |
13772 | |
13773 | return build_functional_cast (type, expression_list); | |
13774 | } | |
13775 | ||
13776 | /* MEMBER_FUNCTION is a member function, or a friend. If default | |
13777 | arguments, or the body of the function have not yet been parsed, | |
13778 | parse them now. */ | |
13779 | ||
13780 | static void | |
94edc4ab | 13781 | cp_parser_late_parsing_for_member (cp_parser* parser, tree member_function) |
a723baf1 MM |
13782 | { |
13783 | cp_lexer *saved_lexer; | |
13784 | ||
13785 | /* If this member is a template, get the underlying | |
13786 | FUNCTION_DECL. */ | |
13787 | if (DECL_FUNCTION_TEMPLATE_P (member_function)) | |
13788 | member_function = DECL_TEMPLATE_RESULT (member_function); | |
13789 | ||
13790 | /* There should not be any class definitions in progress at this | |
13791 | point; the bodies of members are only parsed outside of all class | |
13792 | definitions. */ | |
13793 | my_friendly_assert (parser->num_classes_being_defined == 0, 20010816); | |
13794 | /* While we're parsing the member functions we might encounter more | |
13795 | classes. We want to handle them right away, but we don't want | |
13796 | them getting mixed up with functions that are currently in the | |
13797 | queue. */ | |
13798 | parser->unparsed_functions_queues | |
13799 | = tree_cons (NULL_TREE, NULL_TREE, parser->unparsed_functions_queues); | |
13800 | ||
13801 | /* Make sure that any template parameters are in scope. */ | |
13802 | maybe_begin_member_template_processing (member_function); | |
13803 | ||
a723baf1 MM |
13804 | /* If the body of the function has not yet been parsed, parse it |
13805 | now. */ | |
13806 | if (DECL_PENDING_INLINE_P (member_function)) | |
13807 | { | |
13808 | tree function_scope; | |
13809 | cp_token_cache *tokens; | |
13810 | ||
13811 | /* The function is no longer pending; we are processing it. */ | |
13812 | tokens = DECL_PENDING_INLINE_INFO (member_function); | |
13813 | DECL_PENDING_INLINE_INFO (member_function) = NULL; | |
13814 | DECL_PENDING_INLINE_P (member_function) = 0; | |
13815 | /* If this was an inline function in a local class, enter the scope | |
13816 | of the containing function. */ | |
13817 | function_scope = decl_function_context (member_function); | |
13818 | if (function_scope) | |
13819 | push_function_context_to (function_scope); | |
13820 | ||
13821 | /* Save away the current lexer. */ | |
13822 | saved_lexer = parser->lexer; | |
13823 | /* Make a new lexer to feed us the tokens saved for this function. */ | |
13824 | parser->lexer = cp_lexer_new_from_tokens (tokens); | |
13825 | parser->lexer->next = saved_lexer; | |
13826 | ||
13827 | /* Set the current source position to be the location of the first | |
13828 | token in the saved inline body. */ | |
3466b292 | 13829 | cp_lexer_peek_token (parser->lexer); |
a723baf1 MM |
13830 | |
13831 | /* Let the front end know that we going to be defining this | |
13832 | function. */ | |
13833 | start_function (NULL_TREE, member_function, NULL_TREE, | |
13834 | SF_PRE_PARSED | SF_INCLASS_INLINE); | |
13835 | ||
13836 | /* Now, parse the body of the function. */ | |
13837 | cp_parser_function_definition_after_declarator (parser, | |
13838 | /*inline_p=*/true); | |
13839 | ||
13840 | /* Leave the scope of the containing function. */ | |
13841 | if (function_scope) | |
13842 | pop_function_context_from (function_scope); | |
13843 | /* Restore the lexer. */ | |
13844 | parser->lexer = saved_lexer; | |
13845 | } | |
13846 | ||
13847 | /* Remove any template parameters from the symbol table. */ | |
13848 | maybe_end_member_template_processing (); | |
13849 | ||
13850 | /* Restore the queue. */ | |
13851 | parser->unparsed_functions_queues | |
13852 | = TREE_CHAIN (parser->unparsed_functions_queues); | |
13853 | } | |
13854 | ||
8db1028e NS |
13855 | /* If DECL contains any default args, remeber it on the unparsed |
13856 | functions queue. */ | |
13857 | ||
13858 | static void | |
13859 | cp_parser_save_default_args (cp_parser* parser, tree decl) | |
13860 | { | |
13861 | tree probe; | |
13862 | ||
13863 | for (probe = TYPE_ARG_TYPES (TREE_TYPE (decl)); | |
13864 | probe; | |
13865 | probe = TREE_CHAIN (probe)) | |
13866 | if (TREE_PURPOSE (probe)) | |
13867 | { | |
13868 | TREE_PURPOSE (parser->unparsed_functions_queues) | |
13869 | = tree_cons (NULL_TREE, decl, | |
13870 | TREE_PURPOSE (parser->unparsed_functions_queues)); | |
13871 | break; | |
13872 | } | |
13873 | return; | |
13874 | } | |
13875 | ||
8218bd34 MM |
13876 | /* FN is a FUNCTION_DECL which may contains a parameter with an |
13877 | unparsed DEFAULT_ARG. Parse the default args now. */ | |
a723baf1 MM |
13878 | |
13879 | static void | |
8218bd34 | 13880 | cp_parser_late_parsing_default_args (cp_parser *parser, tree fn) |
a723baf1 MM |
13881 | { |
13882 | cp_lexer *saved_lexer; | |
13883 | cp_token_cache *tokens; | |
13884 | bool saved_local_variables_forbidden_p; | |
13885 | tree parameters; | |
8218bd34 MM |
13886 | |
13887 | for (parameters = TYPE_ARG_TYPES (TREE_TYPE (fn)); | |
a723baf1 MM |
13888 | parameters; |
13889 | parameters = TREE_CHAIN (parameters)) | |
13890 | { | |
13891 | if (!TREE_PURPOSE (parameters) | |
13892 | || TREE_CODE (TREE_PURPOSE (parameters)) != DEFAULT_ARG) | |
13893 | continue; | |
13894 | ||
13895 | /* Save away the current lexer. */ | |
13896 | saved_lexer = parser->lexer; | |
13897 | /* Create a new one, using the tokens we have saved. */ | |
13898 | tokens = DEFARG_TOKENS (TREE_PURPOSE (parameters)); | |
13899 | parser->lexer = cp_lexer_new_from_tokens (tokens); | |
13900 | ||
13901 | /* Set the current source position to be the location of the | |
13902 | first token in the default argument. */ | |
3466b292 | 13903 | cp_lexer_peek_token (parser->lexer); |
a723baf1 MM |
13904 | |
13905 | /* Local variable names (and the `this' keyword) may not appear | |
13906 | in a default argument. */ | |
13907 | saved_local_variables_forbidden_p = parser->local_variables_forbidden_p; | |
13908 | parser->local_variables_forbidden_p = true; | |
13909 | /* Parse the assignment-expression. */ | |
8218bd34 | 13910 | if (DECL_CONTEXT (fn)) |
14d22dd6 | 13911 | push_nested_class (DECL_CONTEXT (fn)); |
a723baf1 | 13912 | TREE_PURPOSE (parameters) = cp_parser_assignment_expression (parser); |
8218bd34 | 13913 | if (DECL_CONTEXT (fn)) |
e5976695 | 13914 | pop_nested_class (); |
a723baf1 MM |
13915 | |
13916 | /* Restore saved state. */ | |
13917 | parser->lexer = saved_lexer; | |
13918 | parser->local_variables_forbidden_p = saved_local_variables_forbidden_p; | |
13919 | } | |
13920 | } | |
13921 | ||
13922 | /* Parse the operand of `sizeof' (or a similar operator). Returns | |
13923 | either a TYPE or an expression, depending on the form of the | |
13924 | input. The KEYWORD indicates which kind of expression we have | |
13925 | encountered. */ | |
13926 | ||
13927 | static tree | |
94edc4ab | 13928 | cp_parser_sizeof_operand (cp_parser* parser, enum rid keyword) |
a723baf1 MM |
13929 | { |
13930 | static const char *format; | |
13931 | tree expr = NULL_TREE; | |
13932 | const char *saved_message; | |
13933 | bool saved_constant_expression_p; | |
13934 | ||
13935 | /* Initialize FORMAT the first time we get here. */ | |
13936 | if (!format) | |
13937 | format = "types may not be defined in `%s' expressions"; | |
13938 | ||
13939 | /* Types cannot be defined in a `sizeof' expression. Save away the | |
13940 | old message. */ | |
13941 | saved_message = parser->type_definition_forbidden_message; | |
13942 | /* And create the new one. */ | |
13943 | parser->type_definition_forbidden_message | |
c68b0a84 KG |
13944 | = xmalloc (strlen (format) |
13945 | + strlen (IDENTIFIER_POINTER (ridpointers[keyword])) | |
13946 | + 1 /* `\0' */); | |
a723baf1 MM |
13947 | sprintf ((char *) parser->type_definition_forbidden_message, |
13948 | format, IDENTIFIER_POINTER (ridpointers[keyword])); | |
13949 | ||
13950 | /* The restrictions on constant-expressions do not apply inside | |
13951 | sizeof expressions. */ | |
13952 | saved_constant_expression_p = parser->constant_expression_p; | |
13953 | parser->constant_expression_p = false; | |
13954 | ||
3beb3abf MM |
13955 | /* Do not actually evaluate the expression. */ |
13956 | ++skip_evaluation; | |
a723baf1 MM |
13957 | /* If it's a `(', then we might be looking at the type-id |
13958 | construction. */ | |
13959 | if (cp_lexer_next_token_is (parser->lexer, CPP_OPEN_PAREN)) | |
13960 | { | |
13961 | tree type; | |
13962 | ||
13963 | /* We can't be sure yet whether we're looking at a type-id or an | |
13964 | expression. */ | |
13965 | cp_parser_parse_tentatively (parser); | |
13966 | /* Consume the `('. */ | |
13967 | cp_lexer_consume_token (parser->lexer); | |
13968 | /* Parse the type-id. */ | |
13969 | type = cp_parser_type_id (parser); | |
13970 | /* Now, look for the trailing `)'. */ | |
13971 | cp_parser_require (parser, CPP_CLOSE_PAREN, "`)'"); | |
13972 | /* If all went well, then we're done. */ | |
13973 | if (cp_parser_parse_definitely (parser)) | |
13974 | { | |
13975 | /* Build a list of decl-specifiers; right now, we have only | |
13976 | a single type-specifier. */ | |
13977 | type = build_tree_list (NULL_TREE, | |
13978 | type); | |
13979 | ||
13980 | /* Call grokdeclarator to figure out what type this is. */ | |
13981 | expr = grokdeclarator (NULL_TREE, | |
13982 | type, | |
13983 | TYPENAME, | |
13984 | /*initialized=*/0, | |
13985 | /*attrlist=*/NULL); | |
13986 | } | |
13987 | } | |
13988 | ||
13989 | /* If the type-id production did not work out, then we must be | |
13990 | looking at the unary-expression production. */ | |
13991 | if (!expr) | |
13992 | expr = cp_parser_unary_expression (parser, /*address_p=*/false); | |
3beb3abf MM |
13993 | /* Go back to evaluating expressions. */ |
13994 | --skip_evaluation; | |
a723baf1 MM |
13995 | |
13996 | /* Free the message we created. */ | |
13997 | free ((char *) parser->type_definition_forbidden_message); | |
13998 | /* And restore the old one. */ | |
13999 | parser->type_definition_forbidden_message = saved_message; | |
14000 | parser->constant_expression_p = saved_constant_expression_p; | |
14001 | ||
14002 | return expr; | |
14003 | } | |
14004 | ||
14005 | /* If the current declaration has no declarator, return true. */ | |
14006 | ||
14007 | static bool | |
14008 | cp_parser_declares_only_class_p (cp_parser *parser) | |
14009 | { | |
14010 | /* If the next token is a `;' or a `,' then there is no | |
14011 | declarator. */ | |
14012 | return (cp_lexer_next_token_is (parser->lexer, CPP_SEMICOLON) | |
14013 | || cp_lexer_next_token_is (parser->lexer, CPP_COMMA)); | |
14014 | } | |
14015 | ||
d17811fd MM |
14016 | /* Simplify EXPR if it is a non-dependent expression. Returns the |
14017 | (possibly simplified) expression. */ | |
14018 | ||
14019 | static tree | |
14020 | cp_parser_fold_non_dependent_expr (tree expr) | |
14021 | { | |
14022 | /* If we're in a template, but EXPR isn't value dependent, simplify | |
14023 | it. We're supposed to treat: | |
14024 | ||
14025 | template <typename T> void f(T[1 + 1]); | |
14026 | template <typename T> void f(T[2]); | |
14027 | ||
14028 | as two declarations of the same function, for example. */ | |
14029 | if (processing_template_decl | |
14030 | && !type_dependent_expression_p (expr) | |
14031 | && !value_dependent_expression_p (expr)) | |
14032 | { | |
14033 | HOST_WIDE_INT saved_processing_template_decl; | |
14034 | ||
14035 | saved_processing_template_decl = processing_template_decl; | |
14036 | processing_template_decl = 0; | |
14037 | expr = tsubst_copy_and_build (expr, | |
14038 | /*args=*/NULL_TREE, | |
14039 | tf_error, | |
b3445994 MM |
14040 | /*in_decl=*/NULL_TREE, |
14041 | /*function_p=*/false); | |
d17811fd MM |
14042 | processing_template_decl = saved_processing_template_decl; |
14043 | } | |
14044 | return expr; | |
14045 | } | |
14046 | ||
a723baf1 MM |
14047 | /* DECL_SPECIFIERS is the representation of a decl-specifier-seq. |
14048 | Returns TRUE iff `friend' appears among the DECL_SPECIFIERS. */ | |
14049 | ||
14050 | static bool | |
94edc4ab | 14051 | cp_parser_friend_p (tree decl_specifiers) |
a723baf1 MM |
14052 | { |
14053 | while (decl_specifiers) | |
14054 | { | |
14055 | /* See if this decl-specifier is `friend'. */ | |
14056 | if (TREE_CODE (TREE_VALUE (decl_specifiers)) == IDENTIFIER_NODE | |
14057 | && C_RID_CODE (TREE_VALUE (decl_specifiers)) == RID_FRIEND) | |
14058 | return true; | |
14059 | ||
14060 | /* Go on to the next decl-specifier. */ | |
14061 | decl_specifiers = TREE_CHAIN (decl_specifiers); | |
14062 | } | |
14063 | ||
14064 | return false; | |
14065 | } | |
14066 | ||
14067 | /* If the next token is of the indicated TYPE, consume it. Otherwise, | |
14068 | issue an error message indicating that TOKEN_DESC was expected. | |
14069 | ||
14070 | Returns the token consumed, if the token had the appropriate type. | |
14071 | Otherwise, returns NULL. */ | |
14072 | ||
14073 | static cp_token * | |
94edc4ab NN |
14074 | cp_parser_require (cp_parser* parser, |
14075 | enum cpp_ttype type, | |
14076 | const char* token_desc) | |
a723baf1 MM |
14077 | { |
14078 | if (cp_lexer_next_token_is (parser->lexer, type)) | |
14079 | return cp_lexer_consume_token (parser->lexer); | |
14080 | else | |
14081 | { | |
e5976695 MM |
14082 | /* Output the MESSAGE -- unless we're parsing tentatively. */ |
14083 | if (!cp_parser_simulate_error (parser)) | |
14084 | error ("expected %s", token_desc); | |
a723baf1 MM |
14085 | return NULL; |
14086 | } | |
14087 | } | |
14088 | ||
14089 | /* Like cp_parser_require, except that tokens will be skipped until | |
14090 | the desired token is found. An error message is still produced if | |
14091 | the next token is not as expected. */ | |
14092 | ||
14093 | static void | |
94edc4ab NN |
14094 | cp_parser_skip_until_found (cp_parser* parser, |
14095 | enum cpp_ttype type, | |
14096 | const char* token_desc) | |
a723baf1 MM |
14097 | { |
14098 | cp_token *token; | |
14099 | unsigned nesting_depth = 0; | |
14100 | ||
14101 | if (cp_parser_require (parser, type, token_desc)) | |
14102 | return; | |
14103 | ||
14104 | /* Skip tokens until the desired token is found. */ | |
14105 | while (true) | |
14106 | { | |
14107 | /* Peek at the next token. */ | |
14108 | token = cp_lexer_peek_token (parser->lexer); | |
14109 | /* If we've reached the token we want, consume it and | |
14110 | stop. */ | |
14111 | if (token->type == type && !nesting_depth) | |
14112 | { | |
14113 | cp_lexer_consume_token (parser->lexer); | |
14114 | return; | |
14115 | } | |
14116 | /* If we've run out of tokens, stop. */ | |
14117 | if (token->type == CPP_EOF) | |
14118 | return; | |
14119 | if (token->type == CPP_OPEN_BRACE | |
14120 | || token->type == CPP_OPEN_PAREN | |
14121 | || token->type == CPP_OPEN_SQUARE) | |
14122 | ++nesting_depth; | |
14123 | else if (token->type == CPP_CLOSE_BRACE | |
14124 | || token->type == CPP_CLOSE_PAREN | |
14125 | || token->type == CPP_CLOSE_SQUARE) | |
14126 | { | |
14127 | if (nesting_depth-- == 0) | |
14128 | return; | |
14129 | } | |
14130 | /* Consume this token. */ | |
14131 | cp_lexer_consume_token (parser->lexer); | |
14132 | } | |
14133 | } | |
14134 | ||
14135 | /* If the next token is the indicated keyword, consume it. Otherwise, | |
14136 | issue an error message indicating that TOKEN_DESC was expected. | |
14137 | ||
14138 | Returns the token consumed, if the token had the appropriate type. | |
14139 | Otherwise, returns NULL. */ | |
14140 | ||
14141 | static cp_token * | |
94edc4ab NN |
14142 | cp_parser_require_keyword (cp_parser* parser, |
14143 | enum rid keyword, | |
14144 | const char* token_desc) | |
a723baf1 MM |
14145 | { |
14146 | cp_token *token = cp_parser_require (parser, CPP_KEYWORD, token_desc); | |
14147 | ||
14148 | if (token && token->keyword != keyword) | |
14149 | { | |
14150 | dyn_string_t error_msg; | |
14151 | ||
14152 | /* Format the error message. */ | |
14153 | error_msg = dyn_string_new (0); | |
14154 | dyn_string_append_cstr (error_msg, "expected "); | |
14155 | dyn_string_append_cstr (error_msg, token_desc); | |
14156 | cp_parser_error (parser, error_msg->s); | |
14157 | dyn_string_delete (error_msg); | |
14158 | return NULL; | |
14159 | } | |
14160 | ||
14161 | return token; | |
14162 | } | |
14163 | ||
14164 | /* Returns TRUE iff TOKEN is a token that can begin the body of a | |
14165 | function-definition. */ | |
14166 | ||
14167 | static bool | |
94edc4ab | 14168 | cp_parser_token_starts_function_definition_p (cp_token* token) |
a723baf1 MM |
14169 | { |
14170 | return (/* An ordinary function-body begins with an `{'. */ | |
14171 | token->type == CPP_OPEN_BRACE | |
14172 | /* A ctor-initializer begins with a `:'. */ | |
14173 | || token->type == CPP_COLON | |
14174 | /* A function-try-block begins with `try'. */ | |
14175 | || token->keyword == RID_TRY | |
14176 | /* The named return value extension begins with `return'. */ | |
14177 | || token->keyword == RID_RETURN); | |
14178 | } | |
14179 | ||
14180 | /* Returns TRUE iff the next token is the ":" or "{" beginning a class | |
14181 | definition. */ | |
14182 | ||
14183 | static bool | |
14184 | cp_parser_next_token_starts_class_definition_p (cp_parser *parser) | |
14185 | { | |
14186 | cp_token *token; | |
14187 | ||
14188 | token = cp_lexer_peek_token (parser->lexer); | |
14189 | return (token->type == CPP_OPEN_BRACE || token->type == CPP_COLON); | |
14190 | } | |
14191 | ||
d17811fd MM |
14192 | /* Returns TRUE iff the next token is the "," or ">" ending a |
14193 | template-argument. */ | |
14194 | ||
14195 | static bool | |
14196 | cp_parser_next_token_ends_template_argument_p (cp_parser *parser) | |
14197 | { | |
14198 | cp_token *token; | |
14199 | ||
14200 | token = cp_lexer_peek_token (parser->lexer); | |
14201 | return (token->type == CPP_COMMA || token->type == CPP_GREATER); | |
14202 | } | |
14203 | ||
a723baf1 MM |
14204 | /* Returns the kind of tag indicated by TOKEN, if it is a class-key, |
14205 | or none_type otherwise. */ | |
14206 | ||
14207 | static enum tag_types | |
94edc4ab | 14208 | cp_parser_token_is_class_key (cp_token* token) |
a723baf1 MM |
14209 | { |
14210 | switch (token->keyword) | |
14211 | { | |
14212 | case RID_CLASS: | |
14213 | return class_type; | |
14214 | case RID_STRUCT: | |
14215 | return record_type; | |
14216 | case RID_UNION: | |
14217 | return union_type; | |
14218 | ||
14219 | default: | |
14220 | return none_type; | |
14221 | } | |
14222 | } | |
14223 | ||
14224 | /* Issue an error message if the CLASS_KEY does not match the TYPE. */ | |
14225 | ||
14226 | static void | |
14227 | cp_parser_check_class_key (enum tag_types class_key, tree type) | |
14228 | { | |
14229 | if ((TREE_CODE (type) == UNION_TYPE) != (class_key == union_type)) | |
14230 | pedwarn ("`%s' tag used in naming `%#T'", | |
14231 | class_key == union_type ? "union" | |
14232 | : class_key == record_type ? "struct" : "class", | |
14233 | type); | |
14234 | } | |
14235 | ||
14236 | /* Look for the `template' keyword, as a syntactic disambiguator. | |
14237 | Return TRUE iff it is present, in which case it will be | |
14238 | consumed. */ | |
14239 | ||
14240 | static bool | |
14241 | cp_parser_optional_template_keyword (cp_parser *parser) | |
14242 | { | |
14243 | if (cp_lexer_next_token_is_keyword (parser->lexer, RID_TEMPLATE)) | |
14244 | { | |
14245 | /* The `template' keyword can only be used within templates; | |
14246 | outside templates the parser can always figure out what is a | |
14247 | template and what is not. */ | |
14248 | if (!processing_template_decl) | |
14249 | { | |
14250 | error ("`template' (as a disambiguator) is only allowed " | |
14251 | "within templates"); | |
14252 | /* If this part of the token stream is rescanned, the same | |
14253 | error message would be generated. So, we purge the token | |
14254 | from the stream. */ | |
14255 | cp_lexer_purge_token (parser->lexer); | |
14256 | return false; | |
14257 | } | |
14258 | else | |
14259 | { | |
14260 | /* Consume the `template' keyword. */ | |
14261 | cp_lexer_consume_token (parser->lexer); | |
14262 | return true; | |
14263 | } | |
14264 | } | |
14265 | ||
14266 | return false; | |
14267 | } | |
14268 | ||
2050a1bb MM |
14269 | /* The next token is a CPP_NESTED_NAME_SPECIFIER. Consume the token, |
14270 | set PARSER->SCOPE, and perform other related actions. */ | |
14271 | ||
14272 | static void | |
14273 | cp_parser_pre_parsed_nested_name_specifier (cp_parser *parser) | |
14274 | { | |
14275 | tree value; | |
14276 | tree check; | |
14277 | ||
14278 | /* Get the stored value. */ | |
14279 | value = cp_lexer_consume_token (parser->lexer)->value; | |
14280 | /* Perform any access checks that were deferred. */ | |
14281 | for (check = TREE_PURPOSE (value); check; check = TREE_CHAIN (check)) | |
cf22909c | 14282 | perform_or_defer_access_check (TREE_PURPOSE (check), TREE_VALUE (check)); |
2050a1bb MM |
14283 | /* Set the scope from the stored value. */ |
14284 | parser->scope = TREE_VALUE (value); | |
14285 | parser->qualifying_scope = TREE_TYPE (value); | |
14286 | parser->object_scope = NULL_TREE; | |
14287 | } | |
14288 | ||
a723baf1 MM |
14289 | /* Add tokens to CACHE until an non-nested END token appears. */ |
14290 | ||
14291 | static void | |
14292 | cp_parser_cache_group (cp_parser *parser, | |
14293 | cp_token_cache *cache, | |
14294 | enum cpp_ttype end, | |
14295 | unsigned depth) | |
14296 | { | |
14297 | while (true) | |
14298 | { | |
14299 | cp_token *token; | |
14300 | ||
14301 | /* Abort a parenthesized expression if we encounter a brace. */ | |
14302 | if ((end == CPP_CLOSE_PAREN || depth == 0) | |
14303 | && cp_lexer_next_token_is (parser->lexer, CPP_SEMICOLON)) | |
14304 | return; | |
14305 | /* Consume the next token. */ | |
14306 | token = cp_lexer_consume_token (parser->lexer); | |
14307 | /* If we've reached the end of the file, stop. */ | |
14308 | if (token->type == CPP_EOF) | |
14309 | return; | |
14310 | /* Add this token to the tokens we are saving. */ | |
14311 | cp_token_cache_push_token (cache, token); | |
14312 | /* See if it starts a new group. */ | |
14313 | if (token->type == CPP_OPEN_BRACE) | |
14314 | { | |
14315 | cp_parser_cache_group (parser, cache, CPP_CLOSE_BRACE, depth + 1); | |
14316 | if (depth == 0) | |
14317 | return; | |
14318 | } | |
14319 | else if (token->type == CPP_OPEN_PAREN) | |
14320 | cp_parser_cache_group (parser, cache, CPP_CLOSE_PAREN, depth + 1); | |
14321 | else if (token->type == end) | |
14322 | return; | |
14323 | } | |
14324 | } | |
14325 | ||
14326 | /* Begin parsing tentatively. We always save tokens while parsing | |
14327 | tentatively so that if the tentative parsing fails we can restore the | |
14328 | tokens. */ | |
14329 | ||
14330 | static void | |
94edc4ab | 14331 | cp_parser_parse_tentatively (cp_parser* parser) |
a723baf1 MM |
14332 | { |
14333 | /* Enter a new parsing context. */ | |
14334 | parser->context = cp_parser_context_new (parser->context); | |
14335 | /* Begin saving tokens. */ | |
14336 | cp_lexer_save_tokens (parser->lexer); | |
14337 | /* In order to avoid repetitive access control error messages, | |
14338 | access checks are queued up until we are no longer parsing | |
14339 | tentatively. */ | |
8d241e0b | 14340 | push_deferring_access_checks (dk_deferred); |
a723baf1 MM |
14341 | } |
14342 | ||
14343 | /* Commit to the currently active tentative parse. */ | |
14344 | ||
14345 | static void | |
94edc4ab | 14346 | cp_parser_commit_to_tentative_parse (cp_parser* parser) |
a723baf1 MM |
14347 | { |
14348 | cp_parser_context *context; | |
14349 | cp_lexer *lexer; | |
14350 | ||
14351 | /* Mark all of the levels as committed. */ | |
14352 | lexer = parser->lexer; | |
14353 | for (context = parser->context; context->next; context = context->next) | |
14354 | { | |
14355 | if (context->status == CP_PARSER_STATUS_KIND_COMMITTED) | |
14356 | break; | |
14357 | context->status = CP_PARSER_STATUS_KIND_COMMITTED; | |
14358 | while (!cp_lexer_saving_tokens (lexer)) | |
14359 | lexer = lexer->next; | |
14360 | cp_lexer_commit_tokens (lexer); | |
14361 | } | |
14362 | } | |
14363 | ||
14364 | /* Abort the currently active tentative parse. All consumed tokens | |
14365 | will be rolled back, and no diagnostics will be issued. */ | |
14366 | ||
14367 | static void | |
94edc4ab | 14368 | cp_parser_abort_tentative_parse (cp_parser* parser) |
a723baf1 MM |
14369 | { |
14370 | cp_parser_simulate_error (parser); | |
14371 | /* Now, pretend that we want to see if the construct was | |
14372 | successfully parsed. */ | |
14373 | cp_parser_parse_definitely (parser); | |
14374 | } | |
14375 | ||
34cd5ae7 | 14376 | /* Stop parsing tentatively. If a parse error has occurred, restore the |
a723baf1 MM |
14377 | token stream. Otherwise, commit to the tokens we have consumed. |
14378 | Returns true if no error occurred; false otherwise. */ | |
14379 | ||
14380 | static bool | |
94edc4ab | 14381 | cp_parser_parse_definitely (cp_parser* parser) |
a723baf1 MM |
14382 | { |
14383 | bool error_occurred; | |
14384 | cp_parser_context *context; | |
14385 | ||
34cd5ae7 | 14386 | /* Remember whether or not an error occurred, since we are about to |
a723baf1 MM |
14387 | destroy that information. */ |
14388 | error_occurred = cp_parser_error_occurred (parser); | |
14389 | /* Remove the topmost context from the stack. */ | |
14390 | context = parser->context; | |
14391 | parser->context = context->next; | |
14392 | /* If no parse errors occurred, commit to the tentative parse. */ | |
14393 | if (!error_occurred) | |
14394 | { | |
14395 | /* Commit to the tokens read tentatively, unless that was | |
14396 | already done. */ | |
14397 | if (context->status != CP_PARSER_STATUS_KIND_COMMITTED) | |
14398 | cp_lexer_commit_tokens (parser->lexer); | |
cf22909c KL |
14399 | |
14400 | pop_to_parent_deferring_access_checks (); | |
a723baf1 MM |
14401 | } |
14402 | /* Otherwise, if errors occurred, roll back our state so that things | |
14403 | are just as they were before we began the tentative parse. */ | |
14404 | else | |
cf22909c KL |
14405 | { |
14406 | cp_lexer_rollback_tokens (parser->lexer); | |
14407 | pop_deferring_access_checks (); | |
14408 | } | |
e5976695 MM |
14409 | /* Add the context to the front of the free list. */ |
14410 | context->next = cp_parser_context_free_list; | |
14411 | cp_parser_context_free_list = context; | |
14412 | ||
14413 | return !error_occurred; | |
a723baf1 MM |
14414 | } |
14415 | ||
a723baf1 MM |
14416 | /* Returns true if we are parsing tentatively -- but have decided that |
14417 | we will stick with this tentative parse, even if errors occur. */ | |
14418 | ||
14419 | static bool | |
94edc4ab | 14420 | cp_parser_committed_to_tentative_parse (cp_parser* parser) |
a723baf1 MM |
14421 | { |
14422 | return (cp_parser_parsing_tentatively (parser) | |
14423 | && parser->context->status == CP_PARSER_STATUS_KIND_COMMITTED); | |
14424 | } | |
14425 | ||
4de8668e | 14426 | /* Returns nonzero iff an error has occurred during the most recent |
a723baf1 MM |
14427 | tentative parse. */ |
14428 | ||
14429 | static bool | |
94edc4ab | 14430 | cp_parser_error_occurred (cp_parser* parser) |
a723baf1 MM |
14431 | { |
14432 | return (cp_parser_parsing_tentatively (parser) | |
14433 | && parser->context->status == CP_PARSER_STATUS_KIND_ERROR); | |
14434 | } | |
14435 | ||
4de8668e | 14436 | /* Returns nonzero if GNU extensions are allowed. */ |
a723baf1 MM |
14437 | |
14438 | static bool | |
94edc4ab | 14439 | cp_parser_allow_gnu_extensions_p (cp_parser* parser) |
a723baf1 MM |
14440 | { |
14441 | return parser->allow_gnu_extensions_p; | |
14442 | } | |
14443 | ||
14444 | \f | |
14445 | ||
14446 | /* The parser. */ | |
14447 | ||
14448 | static GTY (()) cp_parser *the_parser; | |
14449 | ||
14450 | /* External interface. */ | |
14451 | ||
d1bd0ded | 14452 | /* Parse one entire translation unit. */ |
a723baf1 | 14453 | |
d1bd0ded GK |
14454 | void |
14455 | c_parse_file (void) | |
a723baf1 MM |
14456 | { |
14457 | bool error_occurred; | |
14458 | ||
14459 | the_parser = cp_parser_new (); | |
78757caa KL |
14460 | push_deferring_access_checks (flag_access_control |
14461 | ? dk_no_deferred : dk_no_check); | |
a723baf1 MM |
14462 | error_occurred = cp_parser_translation_unit (the_parser); |
14463 | the_parser = NULL; | |
a723baf1 MM |
14464 | } |
14465 | ||
14466 | /* Clean up after parsing the entire translation unit. */ | |
14467 | ||
14468 | void | |
94edc4ab | 14469 | free_parser_stacks (void) |
a723baf1 MM |
14470 | { |
14471 | /* Nothing to do. */ | |
14472 | } | |
14473 | ||
14474 | /* This variable must be provided by every front end. */ | |
14475 | ||
14476 | int yydebug; | |
14477 | ||
14478 | #include "gt-cp-parser.h" |