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aed81407 | 1 | /* Definitions for C++ name lookup routines. |
85ec4feb | 2 | Copyright (C) 2003-2018 Free Software Foundation, Inc. |
aed81407 GDR |
3 | Contributed by Gabriel Dos Reis <gdr@integrable-solutions.net> |
4 | ||
ed3cf953 | 5 | This file is part of GCC. |
aed81407 | 6 | |
ed3cf953 | 7 | GCC is free software; you can redistribute it and/or modify |
aed81407 | 8 | it under the terms of the GNU General Public License as published by |
e77f031d | 9 | the Free Software Foundation; either version 3, or (at your option) |
aed81407 GDR |
10 | any later version. |
11 | ||
ed3cf953 | 12 | GCC is distributed in the hope that it will be useful, |
aed81407 GDR |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
e77f031d NC |
18 | along with GCC; see the file COPYING3. If not see |
19 | <http://www.gnu.org/licenses/>. */ | |
aed81407 GDR |
20 | |
21 | #include "config.h" | |
6c7a259b | 22 | #define INCLUDE_UNIQUE_PTR |
aed81407 GDR |
23 | #include "system.h" |
24 | #include "coretypes.h" | |
2adfab87 AM |
25 | #include "cp-tree.h" |
26 | #include "timevar.h" | |
d8a2d370 DN |
27 | #include "stringpool.h" |
28 | #include "print-tree.h" | |
29 | #include "attribs.h" | |
6097b0c3 | 30 | #include "debug.h" |
39dabefd | 31 | #include "c-family/c-pragma.h" |
501c95ff | 32 | #include "params.h" |
52ed68f7 DM |
33 | #include "gcc-rich-location.h" |
34 | #include "spellcheck-tree.h" | |
35 | #include "parser.h" | |
6c7a259b | 36 | #include "c-family/name-hint.h" |
26edace6 | 37 | #include "c-family/known-headers.h" |
613bc14f | 38 | #include "c-family/c-spellcheck.h" |
00e8de68 | 39 | |
b655c310 NS |
40 | static cxx_binding *cxx_binding_make (tree value, tree type); |
41 | static cp_binding_level *innermost_nonclass_level (void); | |
42 | static void set_identifier_type_value_with_scope (tree id, tree decl, | |
43 | cp_binding_level *b); | |
cb731872 | 44 | static bool maybe_suggest_missing_std_header (location_t location, tree name); |
15f8ac7f | 45 | |
3c9cca88 NS |
46 | /* Create an overload suitable for recording an artificial TYPE_DECL |
47 | and another decl. We use this machanism to implement the struct | |
48 | stat hack within a namespace. It'd be nice to use it everywhere. */ | |
49 | ||
50 | #define STAT_HACK_P(N) ((N) && TREE_CODE (N) == OVERLOAD && OVL_LOOKUP_P (N)) | |
51 | #define STAT_TYPE(N) TREE_TYPE (N) | |
52 | #define STAT_DECL(N) OVL_FUNCTION (N) | |
53 | #define MAYBE_STAT_DECL(N) (STAT_HACK_P (N) ? STAT_DECL (N) : N) | |
54 | #define MAYBE_STAT_TYPE(N) (STAT_HACK_P (N) ? STAT_TYPE (N) : NULL_TREE) | |
55 | ||
3d7ff728 NS |
56 | /* Create a STAT_HACK node with DECL as the value binding and TYPE as |
57 | the type binding. */ | |
58 | ||
59 | static tree | |
60 | stat_hack (tree decl = NULL_TREE, tree type = NULL_TREE) | |
3c9cca88 NS |
61 | { |
62 | tree result = make_node (OVERLOAD); | |
63 | ||
64 | /* Mark this as a lookup, so we can tell this is a stat hack. */ | |
65 | OVL_LOOKUP_P (result) = true; | |
66 | STAT_DECL (result) = decl; | |
67 | STAT_TYPE (result) = type; | |
68 | return result; | |
69 | } | |
70 | ||
3a9cc685 NS |
71 | /* Create a local binding level for NAME. */ |
72 | ||
73 | static cxx_binding * | |
74 | create_local_binding (cp_binding_level *level, tree name) | |
75 | { | |
76 | cxx_binding *binding = cxx_binding_make (NULL, NULL); | |
77 | ||
78 | INHERITED_VALUE_BINDING_P (binding) = false; | |
79 | LOCAL_BINDING_P (binding) = true; | |
80 | binding->scope = level; | |
81 | binding->previous = IDENTIFIER_BINDING (name); | |
82 | ||
83 | IDENTIFIER_BINDING (name) = binding; | |
84 | ||
85 | return binding; | |
86 | } | |
87 | ||
aa7bda5f NS |
88 | /* Find the binding for NAME in namespace NS. If CREATE_P is true, |
89 | make an empty binding if there wasn't one. */ | |
90 | ||
3c9cca88 NS |
91 | static tree * |
92 | find_namespace_slot (tree ns, tree name, bool create_p = false) | |
aa7bda5f | 93 | { |
e833f686 NS |
94 | tree *slot = DECL_NAMESPACE_BINDINGS (ns) |
95 | ->find_slot_with_hash (name, name ? IDENTIFIER_HASH_VALUE (name) : 0, | |
96 | create_p ? INSERT : NO_INSERT); | |
98c28dd4 | 97 | return slot; |
3c9cca88 NS |
98 | } |
99 | ||
100 | static tree | |
101 | find_namespace_value (tree ns, tree name) | |
102 | { | |
103 | tree *b = find_namespace_slot (ns, name); | |
104 | ||
105 | return b ? MAYBE_STAT_DECL (*b) : NULL_TREE; | |
aa7bda5f NS |
106 | } |
107 | ||
b655c310 | 108 | /* Add DECL to the list of things declared in B. */ |
5880f14f | 109 | |
b655c310 | 110 | static void |
9d029ddf | 111 | add_decl_to_level (cp_binding_level *b, tree decl) |
5880f14f | 112 | { |
5256a7f5 | 113 | gcc_assert (b->kind != sk_class); |
b655c310 | 114 | |
c957e9c0 NS |
115 | /* Make sure we don't create a circular list. xref_tag can end |
116 | up pushing the same artificial decl more than once. We | |
117 | should have already detected that in update_binding. */ | |
118 | gcc_assert (b->names != decl); | |
119 | ||
120 | /* We build up the list in reverse order, and reverse it later if | |
121 | necessary. */ | |
122 | TREE_CHAIN (decl) = b->names; | |
123 | b->names = decl; | |
124 | ||
125 | /* If appropriate, add decl to separate list of statics. We | |
126 | include extern variables because they might turn out to be | |
127 | static later. It's OK for this list to contain a few false | |
128 | positives. */ | |
129 | if (b->kind == sk_namespace | |
130 | && ((VAR_P (decl) | |
131 | && (TREE_STATIC (decl) || DECL_EXTERNAL (decl))) | |
132 | || (TREE_CODE (decl) == FUNCTION_DECL | |
133 | && (!TREE_PUBLIC (decl) | |
134 | || decl_anon_ns_mem_p (decl) | |
135 | || DECL_DECLARED_INLINE_P (decl))))) | |
136 | vec_safe_push (static_decls, decl); | |
b655c310 | 137 | } |
daafa301 | 138 | |
59a4ede9 NS |
139 | /* Find the binding for NAME in the local binding level B. */ |
140 | ||
141 | static cxx_binding * | |
142 | find_local_binding (cp_binding_level *b, tree name) | |
143 | { | |
144 | if (cxx_binding *binding = IDENTIFIER_BINDING (name)) | |
145 | for (;; b = b->level_chain) | |
146 | { | |
147 | if (binding->scope == b | |
148 | && !(VAR_P (binding->value) | |
149 | && DECL_DEAD_FOR_LOCAL (binding->value))) | |
150 | return binding; | |
151 | ||
152 | /* Cleanup contours are transparent to the language. */ | |
153 | if (b->kind != sk_cleanup) | |
154 | break; | |
155 | } | |
156 | return NULL; | |
157 | } | |
158 | ||
f35a733d | 159 | struct name_lookup |
b655c310 | 160 | { |
932f48ac NS |
161 | public: |
162 | typedef std::pair<tree, tree> using_pair; | |
163 | typedef vec<using_pair, va_heap, vl_embed> using_queue; | |
164 | ||
f35a733d NS |
165 | public: |
166 | tree name; /* The identifier being looked for. */ | |
167 | tree value; /* A (possibly ambiguous) set of things found. */ | |
168 | tree type; /* A type that has been found. */ | |
9dda0ace | 169 | int flags; /* Lookup flags. */ |
3d7ff728 NS |
170 | bool deduping; /* Full deduping is needed because using declarations |
171 | are in play. */ | |
f35a733d NS |
172 | vec<tree, va_heap, vl_embed> *scopes; |
173 | name_lookup *previous; /* Previously active lookup. */ | |
f35a733d NS |
174 | |
175 | protected: | |
176 | /* Marked scope stack for outermost name lookup. */ | |
177 | static vec<tree, va_heap, vl_embed> *shared_scopes; | |
178 | /* Currently active lookup. */ | |
179 | static name_lookup *active; | |
180 | ||
181 | public: | |
9dda0ace NS |
182 | name_lookup (tree n, int f = 0) |
183 | : name (n), value (NULL_TREE), type (NULL_TREE), flags (f), | |
3d7ff728 | 184 | deduping (false), scopes (NULL), previous (NULL) |
f35a733d NS |
185 | { |
186 | preserve_state (); | |
187 | } | |
188 | ~name_lookup () | |
189 | { | |
f35a733d NS |
190 | restore_state (); |
191 | } | |
192 | ||
193 | private: /* Uncopyable, unmovable, unassignable. I am a rock. */ | |
194 | name_lookup (const name_lookup &); | |
195 | name_lookup &operator= (const name_lookup &); | |
196 | ||
197 | protected: | |
198 | static bool seen_p (tree scope) | |
199 | { | |
200 | return LOOKUP_SEEN_P (scope); | |
201 | } | |
202 | static bool found_p (tree scope) | |
203 | { | |
204 | return LOOKUP_FOUND_P (scope); | |
205 | } | |
206 | ||
207 | void mark_seen (tree scope); /* Mark and add to scope vector. */ | |
208 | static void mark_found (tree scope) | |
209 | { | |
210 | gcc_checking_assert (seen_p (scope)); | |
211 | LOOKUP_FOUND_P (scope) = true; | |
212 | } | |
213 | bool see_and_mark (tree scope) | |
214 | { | |
215 | bool ret = seen_p (scope); | |
216 | if (!ret) | |
217 | mark_seen (scope); | |
218 | return ret; | |
219 | } | |
220 | bool find_and_mark (tree scope); | |
221 | ||
222 | private: | |
223 | void preserve_state (); | |
224 | void restore_state (); | |
225 | ||
9dda0ace NS |
226 | private: |
227 | static tree ambiguous (tree thing, tree current); | |
3d7ff728 | 228 | void add_overload (tree fns); |
9dda0ace NS |
229 | void add_value (tree new_val); |
230 | void add_type (tree new_type); | |
231 | bool process_binding (tree val_bind, tree type_bind); | |
232 | ||
233 | /* Look in only namespace. */ | |
234 | bool search_namespace_only (tree scope); | |
235 | /* Look in namespace and its (recursive) inlines. Ignore using | |
236 | directives. Return true if something found (inc dups). */ | |
237 | bool search_namespace (tree scope); | |
238 | /* Look in the using directives of namespace + inlines using | |
239 | qualified lookup rules. */ | |
240 | bool search_usings (tree scope); | |
241 | ||
932f48ac NS |
242 | private: |
243 | using_queue *queue_namespace (using_queue *queue, int depth, tree scope); | |
3c9feefc NS |
244 | using_queue *do_queue_usings (using_queue *queue, int depth, |
245 | vec<tree, va_gc> *usings); | |
246 | using_queue *queue_usings (using_queue *queue, int depth, | |
247 | vec<tree, va_gc> *usings) | |
932f48ac NS |
248 | { |
249 | if (usings) | |
250 | queue = do_queue_usings (queue, depth, usings); | |
251 | return queue; | |
252 | } | |
253 | ||
9dda0ace | 254 | private: |
f35a733d NS |
255 | void add_fns (tree); |
256 | ||
257 | void adl_expr (tree); | |
258 | void adl_type (tree); | |
259 | void adl_template_arg (tree); | |
260 | void adl_class (tree); | |
261 | void adl_bases (tree); | |
262 | void adl_class_only (tree); | |
263 | void adl_namespace (tree); | |
264 | void adl_namespace_only (tree); | |
265 | ||
266 | public: | |
9dda0ace NS |
267 | /* Search namespace + inlines + maybe usings as qualified lookup. */ |
268 | bool search_qualified (tree scope, bool usings = true); | |
269 | ||
932f48ac NS |
270 | /* Search namespace + inlines + usings as unqualified lookup. */ |
271 | bool search_unqualified (tree scope, cp_binding_level *); | |
272 | ||
9dda0ace | 273 | /* ADL lookup of ARGS. */ |
f35a733d | 274 | tree search_adl (tree fns, vec<tree, va_gc> *args); |
b655c310 | 275 | }; |
8db29d88 | 276 | |
f35a733d NS |
277 | /* Scope stack shared by all outermost lookups. This avoids us |
278 | allocating and freeing on every single lookup. */ | |
279 | vec<tree, va_heap, vl_embed> *name_lookup::shared_scopes; | |
8db29d88 | 280 | |
f35a733d NS |
281 | /* Currently active lookup. */ |
282 | name_lookup *name_lookup::active; | |
283 | ||
284 | /* Name lookup is recursive, becase ADL can cause template | |
285 | instatiation. This is of course a rare event, so we optimize for | |
286 | it not happening. When we discover an active name-lookup, which | |
287 | must be an ADL lookup, we need to unmark the marked scopes and also | |
288 | unmark the lookup we might have been accumulating. */ | |
289 | ||
290 | void | |
291 | name_lookup::preserve_state () | |
8db29d88 | 292 | { |
f35a733d NS |
293 | previous = active; |
294 | if (previous) | |
295 | { | |
296 | unsigned length = vec_safe_length (previous->scopes); | |
297 | vec_safe_reserve (previous->scopes, length * 2); | |
298 | for (unsigned ix = length; ix--;) | |
299 | { | |
300 | tree decl = (*previous->scopes)[ix]; | |
301 | ||
302 | gcc_checking_assert (LOOKUP_SEEN_P (decl)); | |
303 | LOOKUP_SEEN_P (decl) = false; | |
304 | ||
305 | /* Preserve the FOUND_P state on the interrupted lookup's | |
306 | stack. */ | |
307 | if (LOOKUP_FOUND_P (decl)) | |
308 | { | |
309 | LOOKUP_FOUND_P (decl) = false; | |
310 | previous->scopes->quick_push (decl); | |
311 | } | |
312 | } | |
32196b87 NS |
313 | |
314 | /* Unmark the outer partial lookup. */ | |
3d7ff728 NS |
315 | if (previous->deduping) |
316 | lookup_mark (previous->value, false); | |
f35a733d | 317 | } |
b655c310 | 318 | else |
f35a733d NS |
319 | scopes = shared_scopes; |
320 | active = this; | |
8db29d88 AO |
321 | } |
322 | ||
f35a733d | 323 | /* Restore the marking state of a lookup we interrupted. */ |
daafa301 | 324 | |
f35a733d NS |
325 | void |
326 | name_lookup::restore_state () | |
5e0c54e5 | 327 | { |
3d7ff728 NS |
328 | if (deduping) |
329 | lookup_mark (value, false); | |
330 | ||
f35a733d NS |
331 | /* Unmark and empty this lookup's scope stack. */ |
332 | for (unsigned ix = vec_safe_length (scopes); ix--;) | |
333 | { | |
334 | tree decl = scopes->pop (); | |
335 | gcc_checking_assert (LOOKUP_SEEN_P (decl)); | |
336 | LOOKUP_SEEN_P (decl) = false; | |
337 | LOOKUP_FOUND_P (decl) = false; | |
338 | } | |
5e0c54e5 | 339 | |
f35a733d NS |
340 | active = previous; |
341 | if (previous) | |
5e0c54e5 | 342 | { |
32196b87 NS |
343 | free (scopes); |
344 | ||
f35a733d NS |
345 | unsigned length = vec_safe_length (previous->scopes); |
346 | for (unsigned ix = 0; ix != length; ix++) | |
b655c310 | 347 | { |
f35a733d NS |
348 | tree decl = (*previous->scopes)[ix]; |
349 | if (LOOKUP_SEEN_P (decl)) | |
350 | { | |
351 | /* The remainder of the scope stack must be recording | |
352 | FOUND_P decls, which we want to pop off. */ | |
353 | do | |
354 | { | |
355 | tree decl = previous->scopes->pop (); | |
356 | gcc_checking_assert (LOOKUP_SEEN_P (decl) | |
357 | && !LOOKUP_FOUND_P (decl)); | |
358 | LOOKUP_FOUND_P (decl) = true; | |
359 | } | |
360 | while (++ix != length); | |
361 | break; | |
362 | } | |
363 | ||
364 | gcc_checking_assert (!LOOKUP_FOUND_P (decl)); | |
365 | LOOKUP_SEEN_P (decl) = true; | |
b655c310 | 366 | } |
5e0c54e5 | 367 | |
32196b87 | 368 | /* Remark the outer partial lookup. */ |
3d7ff728 NS |
369 | if (previous->deduping) |
370 | lookup_mark (previous->value, true); | |
f35a733d NS |
371 | } |
372 | else | |
373 | shared_scopes = scopes; | |
5e0c54e5 | 374 | } |
5e0c54e5 | 375 | |
f35a733d NS |
376 | void |
377 | name_lookup::mark_seen (tree scope) | |
b655c310 | 378 | { |
f35a733d NS |
379 | gcc_checking_assert (!seen_p (scope)); |
380 | LOOKUP_SEEN_P (scope) = true; | |
381 | vec_safe_push (scopes, scope); | |
382 | } | |
daafa301 | 383 | |
f35a733d NS |
384 | bool |
385 | name_lookup::find_and_mark (tree scope) | |
386 | { | |
387 | bool result = LOOKUP_FOUND_P (scope); | |
388 | if (!result) | |
389 | { | |
390 | LOOKUP_FOUND_P (scope) = true; | |
391 | if (!LOOKUP_SEEN_P (scope)) | |
392 | vec_safe_push (scopes, scope); | |
393 | } | |
5e0c54e5 | 394 | |
f35a733d NS |
395 | return result; |
396 | } | |
daafa301 | 397 | |
9dda0ace NS |
398 | /* THING and CURRENT are ambiguous, concatenate them. */ |
399 | ||
400 | tree | |
401 | name_lookup::ambiguous (tree thing, tree current) | |
402 | { | |
403 | if (TREE_CODE (current) != TREE_LIST) | |
404 | { | |
405 | current = build_tree_list (NULL_TREE, current); | |
406 | TREE_TYPE (current) = error_mark_node; | |
407 | } | |
408 | current = tree_cons (NULL_TREE, thing, current); | |
409 | TREE_TYPE (current) = error_mark_node; | |
410 | ||
411 | return current; | |
412 | } | |
413 | ||
3d7ff728 NS |
414 | /* FNS is a new overload set to add to the exising set. */ |
415 | ||
416 | void | |
417 | name_lookup::add_overload (tree fns) | |
418 | { | |
419 | if (!deduping && TREE_CODE (fns) == OVERLOAD) | |
420 | { | |
421 | tree probe = fns; | |
422 | if (flags & LOOKUP_HIDDEN) | |
423 | probe = ovl_skip_hidden (probe); | |
424 | if (probe && TREE_CODE (probe) == OVERLOAD && OVL_USING_P (probe)) | |
425 | { | |
426 | /* We're about to add something found by a using | |
427 | declaration, so need to engage deduping mode. */ | |
428 | lookup_mark (value, true); | |
429 | deduping = true; | |
430 | } | |
431 | } | |
432 | ||
433 | value = lookup_maybe_add (fns, value, deduping); | |
434 | } | |
435 | ||
9dda0ace NS |
436 | /* Add a NEW_VAL, a found value binding into the current value binding. */ |
437 | ||
438 | void | |
439 | name_lookup::add_value (tree new_val) | |
440 | { | |
3d7ff728 NS |
441 | if (OVL_P (new_val) && (!value || OVL_P (value))) |
442 | add_overload (new_val); | |
443 | else if (!value) | |
9dda0ace NS |
444 | value = new_val; |
445 | else if (value == new_val) | |
446 | ; | |
447 | else if ((TREE_CODE (value) == TYPE_DECL | |
448 | && TREE_CODE (new_val) == TYPE_DECL | |
449 | && same_type_p (TREE_TYPE (value), TREE_TYPE (new_val)))) | |
71bbbd13 NS |
450 | /* Typedefs to the same type. */; |
451 | else if (TREE_CODE (value) == NAMESPACE_DECL | |
452 | && TREE_CODE (new_val) == NAMESPACE_DECL | |
453 | && ORIGINAL_NAMESPACE (value) == ORIGINAL_NAMESPACE (new_val)) | |
454 | /* Namespace (possibly aliased) to the same namespace. Locate | |
455 | the namespace*/ | |
456 | value = ORIGINAL_NAMESPACE (value); | |
9dda0ace | 457 | else |
3d7ff728 NS |
458 | { |
459 | if (deduping) | |
460 | { | |
461 | /* Disengage deduping mode. */ | |
462 | lookup_mark (value, false); | |
463 | deduping = false; | |
464 | } | |
465 | value = ambiguous (new_val, value); | |
466 | } | |
9dda0ace NS |
467 | } |
468 | ||
469 | /* Add a NEW_TYPE, a found type binding into the current type binding. */ | |
470 | ||
471 | void | |
472 | name_lookup::add_type (tree new_type) | |
473 | { | |
474 | if (!type) | |
475 | type = new_type; | |
476 | else if (TREE_CODE (type) == TREE_LIST | |
477 | || !same_type_p (TREE_TYPE (type), TREE_TYPE (new_type))) | |
478 | type = ambiguous (new_type, type); | |
479 | } | |
480 | ||
481 | /* Process a found binding containing NEW_VAL and NEW_TYPE. Returns | |
482 | true if we actually found something noteworthy. */ | |
483 | ||
484 | bool | |
485 | name_lookup::process_binding (tree new_val, tree new_type) | |
486 | { | |
487 | /* Did we really see a type? */ | |
488 | if (new_type | |
489 | && (LOOKUP_NAMESPACES_ONLY (flags) | |
490 | || (!(flags & LOOKUP_HIDDEN) | |
491 | && DECL_LANG_SPECIFIC (new_type) | |
492 | && DECL_ANTICIPATED (new_type)))) | |
493 | new_type = NULL_TREE; | |
494 | ||
495 | if (new_val && !(flags & LOOKUP_HIDDEN)) | |
496 | new_val = ovl_skip_hidden (new_val); | |
497 | ||
498 | /* Do we really see a value? */ | |
499 | if (new_val) | |
500 | switch (TREE_CODE (new_val)) | |
501 | { | |
502 | case TEMPLATE_DECL: | |
503 | /* If we expect types or namespaces, and not templates, | |
504 | or this is not a template class. */ | |
505 | if ((LOOKUP_QUALIFIERS_ONLY (flags) | |
506 | && !DECL_TYPE_TEMPLATE_P (new_val))) | |
507 | new_val = NULL_TREE; | |
508 | break; | |
509 | case TYPE_DECL: | |
510 | if (LOOKUP_NAMESPACES_ONLY (flags) | |
511 | || (new_type && (flags & LOOKUP_PREFER_TYPES))) | |
512 | new_val = NULL_TREE; | |
513 | break; | |
514 | case NAMESPACE_DECL: | |
515 | if (LOOKUP_TYPES_ONLY (flags)) | |
516 | new_val = NULL_TREE; | |
517 | break; | |
518 | default: | |
519 | if (LOOKUP_QUALIFIERS_ONLY (flags)) | |
520 | new_val = NULL_TREE; | |
521 | } | |
522 | ||
523 | if (!new_val) | |
524 | { | |
525 | new_val = new_type; | |
526 | new_type = NULL_TREE; | |
527 | } | |
528 | ||
529 | /* Merge into the lookup */ | |
530 | if (new_val) | |
531 | add_value (new_val); | |
532 | if (new_type) | |
533 | add_type (new_type); | |
534 | ||
535 | return new_val != NULL_TREE; | |
536 | } | |
537 | ||
538 | /* Look in exactly namespace SCOPE. */ | |
539 | ||
540 | bool | |
541 | name_lookup::search_namespace_only (tree scope) | |
542 | { | |
543 | bool found = false; | |
544 | ||
3c9cca88 NS |
545 | if (tree *binding = find_namespace_slot (scope, name)) |
546 | found |= process_binding (MAYBE_STAT_DECL (*binding), | |
547 | MAYBE_STAT_TYPE (*binding)); | |
9dda0ace NS |
548 | |
549 | return found; | |
550 | } | |
551 | ||
552 | /* Conditionally look in namespace SCOPE and inline children. */ | |
553 | ||
554 | bool | |
555 | name_lookup::search_namespace (tree scope) | |
556 | { | |
557 | if (see_and_mark (scope)) | |
558 | /* We've visited this scope before. Return what we found then. */ | |
559 | return found_p (scope); | |
560 | ||
561 | /* Look in exactly namespace. */ | |
562 | bool found = search_namespace_only (scope); | |
563 | ||
3c9feefc NS |
564 | /* Recursively look in its inline children. */ |
565 | if (vec<tree, va_gc> *inlinees = DECL_NAMESPACE_INLINEES (scope)) | |
566 | for (unsigned ix = inlinees->length (); ix--;) | |
567 | found |= search_namespace ((*inlinees)[ix]); | |
9dda0ace NS |
568 | |
569 | if (found) | |
570 | mark_found (scope); | |
571 | ||
572 | return found; | |
573 | } | |
574 | ||
575 | /* Recursively follow using directives of SCOPE & its inline children. | |
576 | Such following is essentially a flood-fill algorithm. */ | |
577 | ||
578 | bool | |
579 | name_lookup::search_usings (tree scope) | |
580 | { | |
581 | /* We do not check seen_p here, as that was already set during the | |
582 | namespace_only walk. */ | |
583 | if (found_p (scope)) | |
584 | return true; | |
585 | ||
586 | bool found = false; | |
3c9feefc NS |
587 | if (vec<tree, va_gc> *usings = DECL_NAMESPACE_USING (scope)) |
588 | for (unsigned ix = usings->length (); ix--;) | |
589 | found |= search_qualified ((*usings)[ix], true); | |
9dda0ace NS |
590 | |
591 | /* Look in its inline children. */ | |
3c9feefc NS |
592 | if (vec<tree, va_gc> *inlinees = DECL_NAMESPACE_INLINEES (scope)) |
593 | for (unsigned ix = inlinees->length (); ix--;) | |
594 | found |= search_usings ((*inlinees)[ix]); | |
9dda0ace NS |
595 | |
596 | if (found) | |
597 | mark_found (scope); | |
598 | ||
599 | return found; | |
600 | } | |
601 | ||
602 | /* Qualified namespace lookup in SCOPE. | |
603 | 1) Look in SCOPE (+inlines). If found, we're done. | |
604 | 2) Otherwise, if USINGS is true, | |
605 | recurse for every using directive of SCOPE (+inlines). | |
606 | ||
607 | Trickiness is (a) loops and (b) multiple paths to same namespace. | |
608 | In both cases we want to not repeat any lookups, and know whether | |
609 | to stop the caller's step #2. Do this via the FOUND_P marker. */ | |
610 | ||
611 | bool | |
612 | name_lookup::search_qualified (tree scope, bool usings) | |
613 | { | |
614 | bool found = false; | |
615 | ||
616 | if (seen_p (scope)) | |
617 | found = found_p (scope); | |
618 | else | |
619 | { | |
620 | found = search_namespace (scope); | |
621 | if (!found && usings) | |
622 | found = search_usings (scope); | |
623 | } | |
624 | ||
625 | return found; | |
626 | } | |
627 | ||
932f48ac NS |
628 | /* Add SCOPE to the unqualified search queue, recursively add its |
629 | inlines and those via using directives. */ | |
630 | ||
631 | name_lookup::using_queue * | |
632 | name_lookup::queue_namespace (using_queue *queue, int depth, tree scope) | |
633 | { | |
634 | if (see_and_mark (scope)) | |
635 | return queue; | |
636 | ||
637 | /* Record it. */ | |
638 | tree common = scope; | |
639 | while (SCOPE_DEPTH (common) > depth) | |
640 | common = CP_DECL_CONTEXT (common); | |
641 | vec_safe_push (queue, using_pair (common, scope)); | |
642 | ||
643 | /* Queue its inline children. */ | |
3c9feefc NS |
644 | if (vec<tree, va_gc> *inlinees = DECL_NAMESPACE_INLINEES (scope)) |
645 | for (unsigned ix = inlinees->length (); ix--;) | |
646 | queue = queue_namespace (queue, depth, (*inlinees)[ix]); | |
932f48ac NS |
647 | |
648 | /* Queue its using targets. */ | |
649 | queue = queue_usings (queue, depth, DECL_NAMESPACE_USING (scope)); | |
650 | ||
651 | return queue; | |
652 | } | |
653 | ||
654 | /* Add the namespaces in USINGS to the unqualified search queue. */ | |
655 | ||
656 | name_lookup::using_queue * | |
3c9feefc NS |
657 | name_lookup::do_queue_usings (using_queue *queue, int depth, |
658 | vec<tree, va_gc> *usings) | |
932f48ac | 659 | { |
3c9feefc NS |
660 | for (unsigned ix = usings->length (); ix--;) |
661 | queue = queue_namespace (queue, depth, (*usings)[ix]); | |
932f48ac NS |
662 | |
663 | return queue; | |
664 | } | |
665 | ||
666 | /* Unqualified namespace lookup in SCOPE. | |
667 | 1) add scope+inlins to worklist. | |
668 | 2) recursively add target of every using directive | |
669 | 3) for each worklist item where SCOPE is common ancestor, search it | |
670 | 4) if nothing find, scope=parent, goto 1. */ | |
671 | ||
672 | bool | |
673 | name_lookup::search_unqualified (tree scope, cp_binding_level *level) | |
674 | { | |
675 | /* Make static to avoid continual reallocation. We're not | |
676 | recursive. */ | |
677 | static using_queue *queue = NULL; | |
678 | bool found = false; | |
679 | int length = vec_safe_length (queue); | |
680 | ||
681 | /* Queue local using-directives. */ | |
682 | for (; level->kind != sk_namespace; level = level->level_chain) | |
683 | queue = queue_usings (queue, SCOPE_DEPTH (scope), level->using_directives); | |
684 | ||
685 | for (; !found; scope = CP_DECL_CONTEXT (scope)) | |
686 | { | |
687 | gcc_assert (!DECL_NAMESPACE_ALIAS (scope)); | |
688 | int depth = SCOPE_DEPTH (scope); | |
689 | ||
690 | /* Queue namespaces reachable from SCOPE. */ | |
691 | queue = queue_namespace (queue, depth, scope); | |
692 | ||
693 | /* Search every queued namespace where SCOPE is the common | |
694 | ancestor. Adjust the others. */ | |
695 | unsigned ix = length; | |
696 | do | |
697 | { | |
698 | using_pair &pair = (*queue)[ix]; | |
699 | while (pair.first == scope) | |
700 | { | |
701 | found |= search_namespace_only (pair.second); | |
702 | pair = queue->pop (); | |
703 | if (ix == queue->length ()) | |
704 | goto done; | |
705 | } | |
706 | /* The depth is the same as SCOPE, find the parent scope. */ | |
707 | if (SCOPE_DEPTH (pair.first) == depth) | |
708 | pair.first = CP_DECL_CONTEXT (pair.first); | |
709 | ix++; | |
710 | } | |
711 | while (ix < queue->length ()); | |
712 | done:; | |
713 | if (scope == global_namespace) | |
714 | break; | |
02c7dd78 NS |
715 | |
716 | /* If looking for hidden names, we only look in the innermost | |
717 | namespace scope. [namespace.memdef]/3 If a friend | |
718 | declaration in a non-local class first declares a class, | |
719 | function, class template or function template the friend is a | |
720 | member of the innermost enclosing namespace. See also | |
721 | [basic.lookup.unqual]/7 */ | |
722 | if (flags & LOOKUP_HIDDEN) | |
723 | break; | |
932f48ac NS |
724 | } |
725 | ||
726 | vec_safe_truncate (queue, length); | |
727 | ||
728 | return found; | |
729 | } | |
730 | ||
f35a733d NS |
731 | /* FNS is a value binding. If it is a (set of overloaded) functions, |
732 | add them into the current value. */ | |
5e0c54e5 | 733 | |
f35a733d NS |
734 | void |
735 | name_lookup::add_fns (tree fns) | |
736 | { | |
737 | if (!fns) | |
738 | return; | |
739 | else if (TREE_CODE (fns) == OVERLOAD) | |
5e0c54e5 | 740 | { |
f35a733d NS |
741 | if (TREE_TYPE (fns) != unknown_type_node) |
742 | fns = OVL_FUNCTION (fns); | |
b655c310 | 743 | } |
f35a733d NS |
744 | else if (!DECL_DECLARES_FUNCTION_P (fns)) |
745 | return; | |
daafa301 | 746 | |
3d7ff728 | 747 | add_overload (fns); |
5e0c54e5 GDR |
748 | } |
749 | ||
f35a733d | 750 | /* Add functions of a namespace to the lookup structure. */ |
daafa301 | 751 | |
f35a733d NS |
752 | void |
753 | name_lookup::adl_namespace_only (tree scope) | |
5e0c54e5 | 754 | { |
f35a733d | 755 | mark_seen (scope); |
5e0c54e5 | 756 | |
f35a733d | 757 | /* Look down into inline namespaces. */ |
3c9feefc NS |
758 | if (vec<tree, va_gc> *inlinees = DECL_NAMESPACE_INLINEES (scope)) |
759 | for (unsigned ix = inlinees->length (); ix--;) | |
760 | adl_namespace_only ((*inlinees)[ix]); | |
b655c310 | 761 | |
3c9cca88 NS |
762 | if (tree fns = find_namespace_value (scope, name)) |
763 | add_fns (ovl_skip_hidden (fns)); | |
f35a733d | 764 | } |
0cbd7506 | 765 | |
f35a733d NS |
766 | /* Find the containing non-inlined namespace, add it and all its |
767 | inlinees. */ | |
b655c310 | 768 | |
f35a733d NS |
769 | void |
770 | name_lookup::adl_namespace (tree scope) | |
771 | { | |
772 | if (seen_p (scope)) | |
773 | return; | |
774 | ||
775 | /* Find the containing non-inline namespace. */ | |
776 | while (DECL_NAMESPACE_INLINE_P (scope)) | |
777 | scope = CP_DECL_CONTEXT (scope); | |
778 | ||
779 | adl_namespace_only (scope); | |
5e0c54e5 GDR |
780 | } |
781 | ||
f35a733d | 782 | /* Adds the class and its friends to the lookup structure. */ |
daafa301 | 783 | |
f35a733d NS |
784 | void |
785 | name_lookup::adl_class_only (tree type) | |
5e0c54e5 | 786 | { |
b655c310 NS |
787 | /* Backend-built structures, such as __builtin_va_list, aren't |
788 | affected by all this. */ | |
789 | if (!CLASS_TYPE_P (type)) | |
f35a733d NS |
790 | return; |
791 | ||
792 | type = TYPE_MAIN_VARIANT (type); | |
5e0c54e5 | 793 | |
f35a733d NS |
794 | if (see_and_mark (type)) |
795 | return; | |
796 | ||
797 | tree context = decl_namespace_context (type); | |
798 | adl_namespace (context); | |
5e0c54e5 | 799 | |
b655c310 | 800 | complete_type (type); |
daafa301 | 801 | |
f35a733d NS |
802 | /* Add friends. */ |
803 | for (tree list = DECL_FRIENDLIST (TYPE_MAIN_DECL (type)); list; | |
b655c310 | 804 | list = TREE_CHAIN (list)) |
f35a733d NS |
805 | if (name == FRIEND_NAME (list)) |
806 | for (tree friends = FRIEND_DECLS (list); friends; | |
b655c310 NS |
807 | friends = TREE_CHAIN (friends)) |
808 | { | |
809 | tree fn = TREE_VALUE (friends); | |
5e0c54e5 | 810 | |
b655c310 NS |
811 | /* Only interested in global functions with potentially hidden |
812 | (i.e. unqualified) declarations. */ | |
813 | if (CP_DECL_CONTEXT (fn) != context) | |
814 | continue; | |
f35a733d | 815 | |
25d446fd NS |
816 | /* Only interested in anticipated friends. (Non-anticipated |
817 | ones will have been inserted during the namespace | |
818 | adl.) */ | |
819 | if (!DECL_ANTICIPATED (fn)) | |
820 | continue; | |
821 | ||
b655c310 NS |
822 | /* Template specializations are never found by name lookup. |
823 | (Templates themselves can be found, but not template | |
824 | specializations.) */ | |
825 | if (TREE_CODE (fn) == FUNCTION_DECL && DECL_USE_TEMPLATE (fn)) | |
826 | continue; | |
5e0c54e5 | 827 | |
f35a733d NS |
828 | add_fns (fn); |
829 | } | |
5e0c54e5 GDR |
830 | } |
831 | ||
b655c310 NS |
832 | /* Adds the class and its bases to the lookup structure. |
833 | Returns true on error. */ | |
daafa301 | 834 | |
f35a733d NS |
835 | void |
836 | name_lookup::adl_bases (tree type) | |
5e0c54e5 | 837 | { |
f35a733d | 838 | adl_class_only (type); |
82f2836c | 839 | |
f35a733d NS |
840 | /* Process baseclasses. */ |
841 | if (tree binfo = TYPE_BINFO (type)) | |
5e0c54e5 | 842 | { |
f35a733d | 843 | tree base_binfo; |
b655c310 | 844 | int i; |
aed81407 | 845 | |
f35a733d NS |
846 | for (i = 0; BINFO_BASE_ITERATE (binfo, i, base_binfo); i++) |
847 | adl_bases (BINFO_TYPE (base_binfo)); | |
b655c310 | 848 | } |
89b578be MM |
849 | } |
850 | ||
b655c310 NS |
851 | /* Adds everything associated with a class argument type to the lookup |
852 | structure. Returns true on error. | |
daafa301 | 853 | |
b655c310 NS |
854 | If T is a class type (including unions), its associated classes are: the |
855 | class itself; the class of which it is a member, if any; and its direct | |
856 | and indirect base classes. Its associated namespaces are the namespaces | |
857 | of which its associated classes are members. Furthermore, if T is a | |
858 | class template specialization, its associated namespaces and classes | |
859 | also include: the namespaces and classes associated with the types of | |
860 | the template arguments provided for template type parameters (excluding | |
861 | template template parameters); the namespaces of which any template | |
862 | template arguments are members; and the classes of which any member | |
863 | templates used as template template arguments are members. [ Note: | |
864 | non-type template arguments do not contribute to the set of associated | |
865 | namespaces. --end note] */ | |
866 | ||
f35a733d NS |
867 | void |
868 | name_lookup::adl_class (tree type) | |
aed81407 | 869 | { |
b655c310 NS |
870 | /* Backend build structures, such as __builtin_va_list, aren't |
871 | affected by all this. */ | |
872 | if (!CLASS_TYPE_P (type)) | |
f35a733d | 873 | return; |
aed81407 | 874 | |
f35a733d NS |
875 | type = TYPE_MAIN_VARIANT (type); |
876 | /* We don't set found here because we have to have set seen first, | |
877 | which is done in the adl_bases walk. */ | |
878 | if (found_p (type)) | |
879 | return; | |
aed81407 | 880 | |
f35a733d NS |
881 | adl_bases (type); |
882 | mark_found (type); | |
daafa301 | 883 | |
f35a733d NS |
884 | if (TYPE_CLASS_SCOPE_P (type)) |
885 | adl_class_only (TYPE_CONTEXT (type)); | |
c87ceb13 | 886 | |
b655c310 NS |
887 | /* Process template arguments. */ |
888 | if (CLASSTYPE_TEMPLATE_INFO (type) | |
889 | && PRIMARY_TEMPLATE_P (CLASSTYPE_TI_TEMPLATE (type))) | |
890 | { | |
f35a733d NS |
891 | tree list = INNERMOST_TEMPLATE_ARGS (CLASSTYPE_TI_ARGS (type)); |
892 | for (int i = 0; i < TREE_VEC_LENGTH (list); ++i) | |
893 | adl_template_arg (TREE_VEC_ELT (list, i)); | |
b655c310 | 894 | } |
90ea9897 MM |
895 | } |
896 | ||
f35a733d NS |
897 | void |
898 | name_lookup::adl_expr (tree expr) | |
899 | { | |
900 | if (!expr) | |
901 | return; | |
90ea9897 | 902 | |
f35a733d NS |
903 | gcc_assert (!TYPE_P (expr)); |
904 | ||
905 | if (TREE_TYPE (expr) != unknown_type_node) | |
906 | { | |
907 | adl_type (TREE_TYPE (expr)); | |
908 | return; | |
909 | } | |
910 | ||
911 | if (TREE_CODE (expr) == ADDR_EXPR) | |
912 | expr = TREE_OPERAND (expr, 0); | |
913 | if (TREE_CODE (expr) == COMPONENT_REF | |
914 | || TREE_CODE (expr) == OFFSET_REF) | |
915 | expr = TREE_OPERAND (expr, 1); | |
916 | expr = MAYBE_BASELINK_FUNCTIONS (expr); | |
917 | ||
918 | if (OVL_P (expr)) | |
919 | for (lkp_iterator iter (expr); iter; ++iter) | |
920 | adl_type (TREE_TYPE (*iter)); | |
921 | else if (TREE_CODE (expr) == TEMPLATE_ID_EXPR) | |
922 | { | |
923 | /* The working paper doesn't currently say how to handle | |
924 | template-id arguments. The sensible thing would seem to be | |
925 | to handle the list of template candidates like a normal | |
926 | overload set, and handle the template arguments like we do | |
927 | for class template specializations. */ | |
928 | ||
929 | /* First the templates. */ | |
930 | adl_expr (TREE_OPERAND (expr, 0)); | |
931 | ||
932 | /* Now the arguments. */ | |
933 | if (tree args = TREE_OPERAND (expr, 1)) | |
934 | for (int ix = TREE_VEC_LENGTH (args); ix--;) | |
935 | adl_template_arg (TREE_VEC_ELT (args, ix)); | |
936 | } | |
937 | } | |
938 | ||
939 | void | |
940 | name_lookup::adl_type (tree type) | |
90ea9897 | 941 | { |
b655c310 | 942 | if (!type) |
f35a733d | 943 | return; |
7de5bccc | 944 | |
b655c310 | 945 | if (TYPE_PTRDATAMEM_P (type)) |
90ea9897 | 946 | { |
b655c310 | 947 | /* Pointer to member: associate class type and value type. */ |
f35a733d NS |
948 | adl_type (TYPE_PTRMEM_CLASS_TYPE (type)); |
949 | adl_type (TYPE_PTRMEM_POINTED_TO_TYPE (type)); | |
950 | return; | |
89b578be | 951 | } |
f35a733d NS |
952 | |
953 | switch (TREE_CODE (type)) | |
b655c310 | 954 | { |
b655c310 NS |
955 | case RECORD_TYPE: |
956 | if (TYPE_PTRMEMFUNC_P (type)) | |
f35a733d NS |
957 | { |
958 | adl_type (TYPE_PTRMEMFUNC_FN_TYPE (type)); | |
959 | return; | |
960 | } | |
b655c310 NS |
961 | /* FALLTHRU */ |
962 | case UNION_TYPE: | |
f35a733d NS |
963 | adl_class (type); |
964 | return; | |
965 | ||
b655c310 NS |
966 | case METHOD_TYPE: |
967 | /* The basetype is referenced in the first arg type, so just | |
968 | fall through. */ | |
969 | case FUNCTION_TYPE: | |
970 | /* Associate the parameter types. */ | |
f35a733d NS |
971 | for (tree args = TYPE_ARG_TYPES (type); args; args = TREE_CHAIN (args)) |
972 | adl_type (TREE_VALUE (args)); | |
973 | /* FALLTHROUGH */ | |
974 | ||
975 | case POINTER_TYPE: | |
976 | case REFERENCE_TYPE: | |
977 | case ARRAY_TYPE: | |
978 | adl_type (TREE_TYPE (type)); | |
979 | return; | |
980 | ||
981 | case ENUMERAL_TYPE: | |
982 | if (TYPE_CLASS_SCOPE_P (type)) | |
983 | adl_class_only (TYPE_CONTEXT (type)); | |
984 | adl_namespace (decl_namespace_context (type)); | |
985 | return; | |
986 | ||
b655c310 NS |
987 | case LANG_TYPE: |
988 | gcc_assert (type == unknown_type_node | |
989 | || type == init_list_type_node); | |
f35a733d NS |
990 | return; |
991 | ||
b655c310 | 992 | case TYPE_PACK_EXPANSION: |
f35a733d NS |
993 | adl_type (PACK_EXPANSION_PATTERN (type)); |
994 | return; | |
c8094d83 | 995 | |
b655c310 | 996 | default: |
f35a733d | 997 | break; |
b655c310 | 998 | } |
00e8de68 GDR |
999 | } |
1000 | ||
f35a733d NS |
1001 | /* Adds everything associated with a template argument to the lookup |
1002 | structure. */ | |
00e8de68 | 1003 | |
f35a733d NS |
1004 | void |
1005 | name_lookup::adl_template_arg (tree arg) | |
00e8de68 | 1006 | { |
f35a733d | 1007 | /* [basic.lookup.koenig] |
00e8de68 | 1008 | |
f35a733d NS |
1009 | If T is a template-id, its associated namespaces and classes are |
1010 | ... the namespaces and classes associated with the types of the | |
1011 | template arguments provided for template type parameters | |
1012 | (excluding template template parameters); the namespaces in which | |
1013 | any template template arguments are defined; and the classes in | |
1014 | which any member templates used as template template arguments | |
1015 | are defined. [Note: non-type template arguments do not | |
1016 | contribute to the set of associated namespaces. ] */ | |
00e8de68 | 1017 | |
f35a733d NS |
1018 | /* Consider first template template arguments. */ |
1019 | if (TREE_CODE (arg) == TEMPLATE_TEMPLATE_PARM | |
1020 | || TREE_CODE (arg) == UNBOUND_CLASS_TEMPLATE) | |
1021 | ; | |
1022 | else if (TREE_CODE (arg) == TEMPLATE_DECL) | |
00e8de68 | 1023 | { |
f35a733d | 1024 | tree ctx = CP_DECL_CONTEXT (arg); |
b655c310 | 1025 | |
f35a733d NS |
1026 | /* It's not a member template. */ |
1027 | if (TREE_CODE (ctx) == NAMESPACE_DECL) | |
1028 | adl_namespace (ctx); | |
1029 | /* Otherwise, it must be member template. */ | |
1030 | else | |
1031 | adl_class_only (ctx); | |
00e8de68 | 1032 | } |
f35a733d NS |
1033 | /* It's an argument pack; handle it recursively. */ |
1034 | else if (ARGUMENT_PACK_P (arg)) | |
b655c310 | 1035 | { |
f35a733d NS |
1036 | tree args = ARGUMENT_PACK_ARGS (arg); |
1037 | int i, len = TREE_VEC_LENGTH (args); | |
1038 | for (i = 0; i < len; ++i) | |
1039 | adl_template_arg (TREE_VEC_ELT (args, i)); | |
b655c310 | 1040 | } |
f35a733d NS |
1041 | /* It's not a template template argument, but it is a type template |
1042 | argument. */ | |
1043 | else if (TYPE_P (arg)) | |
1044 | adl_type (arg); | |
00e8de68 GDR |
1045 | } |
1046 | ||
f35a733d NS |
1047 | /* Perform ADL lookup. FNS is the existing lookup result and ARGS are |
1048 | the call arguments. */ | |
9485d254 | 1049 | |
f35a733d NS |
1050 | tree |
1051 | name_lookup::search_adl (tree fns, vec<tree, va_gc> *args) | |
9485d254 | 1052 | { |
3d7ff728 NS |
1053 | if (fns) |
1054 | { | |
1055 | deduping = true; | |
1056 | lookup_mark (fns, true); | |
1057 | } | |
f35a733d | 1058 | value = fns; |
7f82286e | 1059 | |
f35a733d NS |
1060 | unsigned ix; |
1061 | tree arg; | |
1062 | ||
1063 | FOR_EACH_VEC_ELT_REVERSE (*args, ix, arg) | |
b67b23f0 NS |
1064 | /* OMP reduction operators put an ADL-significant type as the |
1065 | first arg. */ | |
1066 | if (TYPE_P (arg)) | |
1067 | adl_type (arg); | |
1068 | else | |
f35a733d NS |
1069 | adl_expr (arg); |
1070 | ||
f35a733d | 1071 | fns = value; |
c87ceb13 | 1072 | |
b655c310 NS |
1073 | return fns; |
1074 | } | |
c87ceb13 | 1075 | |
9dda0ace NS |
1076 | static bool qualified_namespace_lookup (tree, name_lookup *); |
1077 | static void consider_binding_level (tree name, | |
1078 | best_match <tree, const char *> &bm, | |
1079 | cp_binding_level *lvl, | |
1080 | bool look_within_fields, | |
1081 | enum lookup_name_fuzzy_kind kind); | |
9dda0ace NS |
1082 | static void diagnose_name_conflict (tree, tree); |
1083 | ||
f35a733d NS |
1084 | /* ADL lookup of NAME. FNS is the result of regular lookup, and we |
1085 | don't add duplicates to it. ARGS is the vector of call | |
1086 | arguments (which will not be empty). */ | |
c87ceb13 | 1087 | |
f35a733d | 1088 | tree |
b655c310 | 1089 | lookup_arg_dependent (tree name, tree fns, vec<tree, va_gc> *args) |
c87ceb13 | 1090 | { |
f35a733d NS |
1091 | bool subtime = timevar_cond_start (TV_NAME_LOOKUP); |
1092 | name_lookup lookup (name); | |
1093 | fns = lookup.search_adl (fns, args); | |
b655c310 | 1094 | timevar_cond_stop (TV_NAME_LOOKUP, subtime); |
f35a733d NS |
1095 | return fns; |
1096 | } | |
1097 | ||
bff8b385 NS |
1098 | /* FNS is an overload set of conversion functions. Return the |
1099 | overloads converting to TYPE. */ | |
9e931c2a NS |
1100 | |
1101 | static tree | |
bff8b385 | 1102 | extract_conversion_operator (tree fns, tree type) |
9e931c2a | 1103 | { |
2e12a855 | 1104 | tree convs = NULL_TREE; |
bff8b385 | 1105 | tree tpls = NULL_TREE; |
9e931c2a | 1106 | |
bff8b385 | 1107 | for (ovl_iterator iter (fns); iter; ++iter) |
9e931c2a | 1108 | { |
bff8b385 NS |
1109 | if (same_type_p (DECL_CONV_FN_TYPE (*iter), type)) |
1110 | convs = lookup_add (*iter, convs); | |
2e12a855 | 1111 | |
bff8b385 NS |
1112 | if (TREE_CODE (*iter) == TEMPLATE_DECL) |
1113 | tpls = lookup_add (*iter, tpls); | |
9e931c2a NS |
1114 | } |
1115 | ||
bff8b385 NS |
1116 | if (!convs) |
1117 | convs = tpls; | |
1118 | ||
2e12a855 | 1119 | return convs; |
9e931c2a NS |
1120 | } |
1121 | ||
783dc739 | 1122 | /* Binary search of (ordered) MEMBER_VEC for NAME. */ |
9e931c2a | 1123 | |
b991151b | 1124 | static tree |
783dc739 | 1125 | member_vec_binary_search (vec<tree, va_gc> *member_vec, tree name) |
9e931c2a | 1126 | { |
783dc739 | 1127 | for (unsigned lo = 0, hi = member_vec->length (); lo < hi;) |
9e931c2a | 1128 | { |
b991151b | 1129 | unsigned mid = (lo + hi) / 2; |
783dc739 | 1130 | tree binding = (*member_vec)[mid]; |
b991151b NS |
1131 | tree binding_name = OVL_NAME (binding); |
1132 | ||
1133 | if (binding_name > name) | |
1134 | hi = mid; | |
1135 | else if (binding_name < name) | |
1136 | lo = mid + 1; | |
1137 | else | |
1138 | return binding; | |
9e931c2a | 1139 | } |
9e931c2a | 1140 | |
b991151b NS |
1141 | return NULL_TREE; |
1142 | } | |
bff8b385 | 1143 | |
783dc739 | 1144 | /* Linear search of (unordered) MEMBER_VEC for NAME. */ |
b991151b NS |
1145 | |
1146 | static tree | |
783dc739 | 1147 | member_vec_linear_search (vec<tree, va_gc> *member_vec, tree name) |
b991151b | 1148 | { |
783dc739 | 1149 | for (int ix = member_vec->length (); ix--;) |
783dc739 | 1150 | if (tree binding = (*member_vec)[ix]) |
10b5c982 NS |
1151 | if (OVL_NAME (binding) == name) |
1152 | return binding; | |
b991151b NS |
1153 | |
1154 | return NULL_TREE; | |
9e931c2a NS |
1155 | } |
1156 | ||
45e3a33d | 1157 | /* Linear search of (partially ordered) fields of KLASS for NAME. */ |
9e931c2a | 1158 | |
b991151b | 1159 | static tree |
45e3a33d | 1160 | fields_linear_search (tree klass, tree name, bool want_type) |
9e931c2a | 1161 | { |
45e3a33d | 1162 | for (tree fields = TYPE_FIELDS (klass); fields; fields = DECL_CHAIN (fields)) |
9e931c2a | 1163 | { |
45e3a33d | 1164 | tree decl = fields; |
9e931c2a | 1165 | |
35129fd3 | 1166 | if (TREE_CODE (decl) == FIELD_DECL |
45e3a33d | 1167 | && ANON_AGGR_TYPE_P (TREE_TYPE (decl))) |
9e931c2a | 1168 | { |
35129fd3 | 1169 | if (tree temp = search_anon_aggr (TREE_TYPE (decl), name, want_type)) |
d68ddd2b | 1170 | return temp; |
9e931c2a | 1171 | } |
9e931c2a | 1172 | |
45e3a33d | 1173 | if (DECL_NAME (decl) != name) |
9e931c2a | 1174 | continue; |
45e3a33d NS |
1175 | |
1176 | if (TREE_CODE (decl) == USING_DECL) | |
9e931c2a NS |
1177 | { |
1178 | decl = strip_using_decl (decl); | |
1179 | if (is_overloaded_fn (decl)) | |
1180 | continue; | |
1181 | } | |
1182 | ||
45e3a33d NS |
1183 | if (DECL_DECLARES_FUNCTION_P (decl)) |
1184 | /* Functions are found separately. */ | |
1185 | continue; | |
1186 | ||
1187 | if (!want_type || DECL_DECLARES_TYPE_P (decl)) | |
9e931c2a NS |
1188 | return decl; |
1189 | } | |
1190 | ||
9e931c2a NS |
1191 | return NULL_TREE; |
1192 | } | |
1193 | ||
35129fd3 NS |
1194 | /* Look for NAME member inside of anonymous aggregate ANON. Although |
1195 | such things should only contain FIELD_DECLs, we check that too | |
1196 | late, and would give very confusing errors if we weren't | |
1197 | permissive here. */ | |
d68ddd2b JJ |
1198 | |
1199 | tree | |
35129fd3 | 1200 | search_anon_aggr (tree anon, tree name, bool want_type) |
d68ddd2b JJ |
1201 | { |
1202 | gcc_assert (COMPLETE_TYPE_P (anon)); | |
35129fd3 NS |
1203 | tree ret = get_class_binding_direct (anon, name, want_type); |
1204 | return ret; | |
d68ddd2b JJ |
1205 | } |
1206 | ||
b991151b NS |
1207 | /* Look for NAME as an immediate member of KLASS (including |
1208 | anon-members or unscoped enum member). TYPE_OR_FNS is zero for | |
1209 | regular search. >0 to get a type binding (if there is one) and <0 | |
1210 | if you want (just) the member function binding. | |
1211 | ||
1212 | Use this if you do not want lazy member creation. */ | |
1213 | ||
1214 | tree | |
1215 | get_class_binding_direct (tree klass, tree name, int type_or_fns) | |
1216 | { | |
1217 | gcc_checking_assert (RECORD_OR_UNION_TYPE_P (klass)); | |
1218 | ||
1219 | /* Conversion operators can only be found by the marker conversion | |
1220 | operator name. */ | |
1221 | bool conv_op = IDENTIFIER_CONV_OP_P (name); | |
1222 | tree lookup = conv_op ? conv_op_identifier : name; | |
1223 | tree val = NULL_TREE; | |
783dc739 | 1224 | vec<tree, va_gc> *member_vec = CLASSTYPE_MEMBER_VEC (klass); |
b991151b | 1225 | |
783dc739 | 1226 | if (COMPLETE_TYPE_P (klass) && member_vec) |
b991151b | 1227 | { |
783dc739 | 1228 | val = member_vec_binary_search (member_vec, lookup); |
45e3a33d NS |
1229 | if (!val) |
1230 | ; | |
1231 | else if (type_or_fns > 0) | |
1232 | { | |
1233 | if (STAT_HACK_P (val)) | |
1234 | val = STAT_TYPE (val); | |
1235 | else if (!DECL_DECLARES_TYPE_P (val)) | |
1236 | val = NULL_TREE; | |
1237 | } | |
1238 | else if (STAT_HACK_P (val)) | |
1239 | val = STAT_DECL (val); | |
1240 | ||
1241 | if (val && TREE_CODE (val) == OVERLOAD | |
1242 | && TREE_CODE (OVL_FUNCTION (val)) == USING_DECL) | |
1243 | { | |
1244 | /* An overload with a dependent USING_DECL. Does the caller | |
1245 | want the USING_DECL or the functions? */ | |
1246 | if (type_or_fns < 0) | |
1247 | val = OVL_CHAIN (val); | |
1248 | else | |
1249 | val = OVL_FUNCTION (val); | |
1250 | } | |
b991151b | 1251 | } |
45e3a33d NS |
1252 | else |
1253 | { | |
783dc739 NS |
1254 | if (member_vec && type_or_fns <= 0) |
1255 | val = member_vec_linear_search (member_vec, lookup); | |
b991151b | 1256 | |
45e3a33d NS |
1257 | if (type_or_fns < 0) |
1258 | /* Don't bother looking for field. We don't want it. */; | |
1259 | else if (!val || (TREE_CODE (val) == OVERLOAD && OVL_USING_P (val))) | |
1260 | /* Dependent using declarations are a 'field', make sure we | |
1261 | return that even if we saw an overload already. */ | |
1262 | if (tree field_val = fields_linear_search (klass, lookup, | |
1263 | type_or_fns > 0)) | |
1264 | if (!val || TREE_CODE (field_val) == USING_DECL) | |
1265 | val = field_val; | |
1266 | } | |
b991151b NS |
1267 | |
1268 | /* Extract the conversion operators asked for, unless the general | |
1269 | conversion operator was requested. */ | |
1270 | if (val && conv_op) | |
1271 | { | |
1272 | gcc_checking_assert (OVL_FUNCTION (val) == conv_op_marker); | |
1273 | val = OVL_CHAIN (val); | |
1274 | if (tree type = TREE_TYPE (name)) | |
1275 | val = extract_conversion_operator (val, type); | |
1276 | } | |
1277 | ||
1278 | return val; | |
1279 | } | |
1280 | ||
1281 | /* Look for NAME's binding in exactly KLASS. See | |
1282 | get_class_binding_direct for argument description. Does lazy | |
1283 | special function creation as necessary. */ | |
9e931c2a NS |
1284 | |
1285 | tree | |
20614c86 | 1286 | get_class_binding (tree klass, tree name, int type_or_fns) |
9e931c2a | 1287 | { |
20614c86 | 1288 | klass = complete_type (klass); |
9e931c2a | 1289 | |
20614c86 | 1290 | if (COMPLETE_TYPE_P (klass)) |
9e931c2a | 1291 | { |
20614c86 | 1292 | /* Lazily declare functions, if we're going to search these. */ |
9e931c2a NS |
1293 | if (IDENTIFIER_CTOR_P (name)) |
1294 | { | |
20614c86 NS |
1295 | if (CLASSTYPE_LAZY_DEFAULT_CTOR (klass)) |
1296 | lazily_declare_fn (sfk_constructor, klass); | |
1297 | if (CLASSTYPE_LAZY_COPY_CTOR (klass)) | |
1298 | lazily_declare_fn (sfk_copy_constructor, klass); | |
1299 | if (CLASSTYPE_LAZY_MOVE_CTOR (klass)) | |
1300 | lazily_declare_fn (sfk_move_constructor, klass); | |
9e931c2a | 1301 | } |
20614c86 | 1302 | else if (IDENTIFIER_DTOR_P (name)) |
9e931c2a | 1303 | { |
20614c86 NS |
1304 | if (CLASSTYPE_LAZY_DESTRUCTOR (klass)) |
1305 | lazily_declare_fn (sfk_destructor, klass); | |
9e931c2a | 1306 | } |
88a819be | 1307 | else if (name == assign_op_identifier) |
9e931c2a | 1308 | { |
20614c86 NS |
1309 | if (CLASSTYPE_LAZY_COPY_ASSIGN (klass)) |
1310 | lazily_declare_fn (sfk_copy_assignment, klass); | |
1311 | if (CLASSTYPE_LAZY_MOVE_ASSIGN (klass)) | |
1312 | lazily_declare_fn (sfk_move_assignment, klass); | |
9e931c2a NS |
1313 | } |
1314 | } | |
1315 | ||
20614c86 | 1316 | return get_class_binding_direct (klass, name, type_or_fns); |
9e931c2a NS |
1317 | } |
1318 | ||
fcaf3065 | 1319 | /* Find the slot containing overloads called 'NAME'. If there is no |
10b5c982 NS |
1320 | such slot and the class is complete, create an empty one, at the |
1321 | correct point in the sorted member vector. Otherwise return NULL. | |
1322 | Deals with conv_op marker handling. */ | |
fcaf3065 NS |
1323 | |
1324 | tree * | |
10b5c982 | 1325 | find_member_slot (tree klass, tree name) |
fcaf3065 NS |
1326 | { |
1327 | bool complete_p = COMPLETE_TYPE_P (klass); | |
10b5c982 | 1328 | |
783dc739 NS |
1329 | vec<tree, va_gc> *member_vec = CLASSTYPE_MEMBER_VEC (klass); |
1330 | if (!member_vec) | |
fcaf3065 | 1331 | { |
783dc739 NS |
1332 | vec_alloc (member_vec, 8); |
1333 | CLASSTYPE_MEMBER_VEC (klass) = member_vec; | |
45e3a33d NS |
1334 | if (complete_p) |
1335 | { | |
783dc739 | 1336 | /* If the class is complete but had no member_vec, we need |
45e3a33d NS |
1337 | to add the TYPE_FIELDS into it. We're also most likely |
1338 | to be adding ctors & dtors, so ask for 6 spare slots (the | |
1339 | abstract cdtors and their clones). */ | |
1340 | set_class_bindings (klass, 6); | |
783dc739 | 1341 | member_vec = CLASSTYPE_MEMBER_VEC (klass); |
45e3a33d | 1342 | } |
fcaf3065 NS |
1343 | } |
1344 | ||
1345 | if (IDENTIFIER_CONV_OP_P (name)) | |
1346 | name = conv_op_identifier; | |
1347 | ||
783dc739 | 1348 | unsigned ix, length = member_vec->length (); |
fcaf3065 NS |
1349 | for (ix = 0; ix < length; ix++) |
1350 | { | |
783dc739 | 1351 | tree *slot = &(*member_vec)[ix]; |
fcaf3065 NS |
1352 | tree fn_name = OVL_NAME (*slot); |
1353 | ||
1354 | if (fn_name == name) | |
1355 | { | |
45e3a33d NS |
1356 | /* If we found an existing slot, it must be a function set. |
1357 | Even with insertion after completion, because those only | |
1358 | happen with artificial fns that have unspellable names. | |
1359 | This means we do not have to deal with the stat hack | |
1360 | either. */ | |
1361 | gcc_checking_assert (OVL_P (*slot)); | |
fcaf3065 NS |
1362 | if (name == conv_op_identifier) |
1363 | { | |
1364 | gcc_checking_assert (OVL_FUNCTION (*slot) == conv_op_marker); | |
1365 | /* Skip the conv-op marker. */ | |
1366 | slot = &OVL_CHAIN (*slot); | |
1367 | } | |
1368 | return slot; | |
1369 | } | |
1370 | ||
1371 | if (complete_p && fn_name > name) | |
1372 | break; | |
1373 | } | |
1374 | ||
10b5c982 | 1375 | /* No slot found, add one if the class is complete. */ |
fcaf3065 NS |
1376 | if (complete_p) |
1377 | { | |
10b5c982 NS |
1378 | /* Do exact allocation, as we don't expect to add many. */ |
1379 | gcc_assert (name != conv_op_identifier); | |
783dc739 | 1380 | vec_safe_reserve_exact (member_vec, 1); |
10b5c982 | 1381 | CLASSTYPE_MEMBER_VEC (klass) = member_vec; |
783dc739 | 1382 | member_vec->quick_insert (ix, NULL_TREE); |
10b5c982 | 1383 | return &(*member_vec)[ix]; |
fcaf3065 | 1384 | } |
10b5c982 NS |
1385 | |
1386 | return NULL; | |
1387 | } | |
1388 | ||
1389 | /* KLASS is an incomplete class to which we're adding a method NAME. | |
1390 | Add a slot and deal with conv_op marker handling. */ | |
1391 | ||
1392 | tree * | |
1393 | add_member_slot (tree klass, tree name) | |
1394 | { | |
1395 | gcc_assert (!COMPLETE_TYPE_P (klass)); | |
1396 | ||
1397 | vec<tree, va_gc> *member_vec = CLASSTYPE_MEMBER_VEC (klass); | |
1398 | vec_safe_push (member_vec, NULL_TREE); | |
783dc739 | 1399 | CLASSTYPE_MEMBER_VEC (klass) = member_vec; |
fcaf3065 | 1400 | |
10b5c982 NS |
1401 | tree *slot = &member_vec->last (); |
1402 | if (IDENTIFIER_CONV_OP_P (name)) | |
fcaf3065 NS |
1403 | { |
1404 | /* Install the marker prefix. */ | |
1405 | *slot = ovl_make (conv_op_marker, NULL_TREE); | |
1406 | slot = &OVL_CHAIN (*slot); | |
1407 | } | |
1408 | ||
1409 | return slot; | |
1410 | } | |
1411 | ||
783dc739 NS |
1412 | /* Comparison function to compare two MEMBER_VEC entries by name. |
1413 | Because we can have duplicates during insertion of TYPE_FIELDS, we | |
1414 | do extra checking so deduping doesn't have to deal with so many | |
1415 | cases. */ | |
20614c86 NS |
1416 | |
1417 | static int | |
783dc739 | 1418 | member_name_cmp (const void *a_p, const void *b_p) |
20614c86 NS |
1419 | { |
1420 | tree a = *(const tree *)a_p; | |
1421 | tree b = *(const tree *)b_p; | |
1422 | tree name_a = DECL_NAME (TREE_CODE (a) == OVERLOAD ? OVL_FUNCTION (a) : a); | |
1423 | tree name_b = DECL_NAME (TREE_CODE (b) == OVERLOAD ? OVL_FUNCTION (b) : b); | |
1424 | ||
45e3a33d NS |
1425 | gcc_checking_assert (name_a && name_b); |
1426 | if (name_a != name_b) | |
1427 | return name_a < name_b ? -1 : +1; | |
1428 | ||
1429 | if (name_a == conv_op_identifier) | |
1430 | { | |
1431 | /* Strip the conv-op markers. */ | |
1432 | gcc_checking_assert (OVL_FUNCTION (a) == conv_op_marker | |
1433 | && OVL_FUNCTION (b) == conv_op_marker); | |
1434 | a = OVL_CHAIN (a); | |
1435 | b = OVL_CHAIN (b); | |
1436 | } | |
1437 | ||
1438 | if (TREE_CODE (a) == OVERLOAD) | |
1439 | a = OVL_FUNCTION (a); | |
1440 | if (TREE_CODE (b) == OVERLOAD) | |
1441 | b = OVL_FUNCTION (b); | |
1442 | ||
1443 | /* We're in STAT_HACK or USING_DECL territory (or possibly error-land). */ | |
12f71313 NS |
1444 | if (TREE_CODE (a) != TREE_CODE (b)) |
1445 | { | |
1446 | /* If one of them is a TYPE_DECL, it loses. */ | |
1447 | if (TREE_CODE (a) == TYPE_DECL) | |
1448 | return +1; | |
1449 | else if (TREE_CODE (b) == TYPE_DECL) | |
1450 | return -1; | |
1451 | ||
1452 | /* If one of them is a USING_DECL, it loses. */ | |
1453 | if (TREE_CODE (a) == USING_DECL) | |
1454 | return +1; | |
1455 | else if (TREE_CODE (b) == USING_DECL) | |
1456 | return -1; | |
1457 | ||
1458 | /* There are no other cases with different kinds of decls, as | |
1459 | duplicate detection should have kicked in earlier. However, | |
1460 | some erroneous cases get though. */ | |
1461 | gcc_assert (errorcount); | |
1462 | } | |
1463 | ||
1464 | /* Using source location would be the best thing here, but we can | |
1465 | get identically-located decls in the following circumstances: | |
1466 | ||
1467 | 1) duplicate artificial type-decls for the same type. | |
1468 | ||
1469 | 2) pack expansions of using-decls. | |
1470 | ||
1471 | We should not be doing #1, but in either case it doesn't matter | |
1472 | how we order these. Use UID as a proxy for source ordering, so | |
1473 | that identically-located decls still have a well-defined stable | |
1474 | ordering. */ | |
6c19e703 JJ |
1475 | if (DECL_UID (a) != DECL_UID (b)) |
1476 | return DECL_UID (a) < DECL_UID (b) ? -1 : +1; | |
1477 | gcc_assert (a == b); | |
1478 | return 0; | |
20614c86 NS |
1479 | } |
1480 | ||
fe920c2d NS |
1481 | static struct { |
1482 | gt_pointer_operator new_value; | |
1483 | void *cookie; | |
1484 | } resort_data; | |
1485 | ||
783dc739 | 1486 | /* This routine compares two fields like member_name_cmp but using the |
20614c86 NS |
1487 | pointer operator in resort_field_decl_data. We don't have to deal |
1488 | with duplicates here. */ | |
fe920c2d NS |
1489 | |
1490 | static int | |
783dc739 | 1491 | resort_member_name_cmp (const void *a_p, const void *b_p) |
fe920c2d | 1492 | { |
20614c86 NS |
1493 | tree a = *(const tree *)a_p; |
1494 | tree b = *(const tree *)b_p; | |
1495 | tree name_a = OVL_NAME (a); | |
1496 | tree name_b = OVL_NAME (b); | |
fe920c2d | 1497 | |
20614c86 NS |
1498 | resort_data.new_value (&name_a, resort_data.cookie); |
1499 | resort_data.new_value (&name_b, resort_data.cookie); | |
fe920c2d | 1500 | |
20614c86 | 1501 | gcc_checking_assert (name_a != name_b); |
fe920c2d | 1502 | |
20614c86 | 1503 | return name_a < name_b ? -1 : +1; |
fe920c2d NS |
1504 | } |
1505 | ||
783dc739 | 1506 | /* Resort CLASSTYPE_MEMBER_VEC because pointers have been reordered. */ |
fe920c2d NS |
1507 | |
1508 | void | |
783dc739 | 1509 | resort_type_member_vec (void *obj, void */*orig_obj*/, |
20614c86 | 1510 | gt_pointer_operator new_value, void* cookie) |
fe920c2d | 1511 | { |
783dc739 | 1512 | if (vec<tree, va_gc> *member_vec = (vec<tree, va_gc> *) obj) |
fe920c2d NS |
1513 | { |
1514 | resort_data.new_value = new_value; | |
1515 | resort_data.cookie = cookie; | |
774ae645 | 1516 | member_vec->qsort (resort_member_name_cmp); |
fe920c2d NS |
1517 | } |
1518 | } | |
1519 | ||
1887fb46 NS |
1520 | /* Recursively count the number of fields in KLASS, including anonymous |
1521 | union members. */ | |
41970ff1 | 1522 | |
1887fb46 NS |
1523 | static unsigned |
1524 | count_class_fields (tree klass) | |
41970ff1 | 1525 | { |
1887fb46 NS |
1526 | unsigned n_fields = 0; |
1527 | ||
1528 | for (tree fields = TYPE_FIELDS (klass); fields; fields = DECL_CHAIN (fields)) | |
1529 | if (DECL_DECLARES_FUNCTION_P (fields)) | |
1530 | /* Functions are dealt with separately. */; | |
1531 | else if (TREE_CODE (fields) == FIELD_DECL | |
1532 | && ANON_AGGR_TYPE_P (TREE_TYPE (fields))) | |
1533 | n_fields += count_class_fields (TREE_TYPE (fields)); | |
1534 | else if (DECL_NAME (fields)) | |
1535 | n_fields += 1; | |
1536 | ||
18a01e85 | 1537 | return n_fields; |
41970ff1 NS |
1538 | } |
1539 | ||
783dc739 NS |
1540 | /* Append all the nonfunction members fields of KLASS to MEMBER_VEC. |
1541 | Recurse for anonymous members. MEMBER_VEC must have space. */ | |
18a01e85 | 1542 | |
45e3a33d | 1543 | static void |
783dc739 | 1544 | member_vec_append_class_fields (vec<tree, va_gc> *member_vec, tree klass) |
18a01e85 | 1545 | { |
1887fb46 NS |
1546 | for (tree fields = TYPE_FIELDS (klass); fields; fields = DECL_CHAIN (fields)) |
1547 | if (DECL_DECLARES_FUNCTION_P (fields)) | |
1548 | /* Functions are handled separately. */; | |
1549 | else if (TREE_CODE (fields) == FIELD_DECL | |
1550 | && ANON_AGGR_TYPE_P (TREE_TYPE (fields))) | |
783dc739 | 1551 | member_vec_append_class_fields (member_vec, TREE_TYPE (fields)); |
1887fb46 | 1552 | else if (DECL_NAME (fields)) |
45e3a33d NS |
1553 | { |
1554 | tree field = fields; | |
1555 | /* Mark a conv-op USING_DECL with the conv-op-marker. */ | |
1556 | if (TREE_CODE (field) == USING_DECL | |
1557 | && IDENTIFIER_CONV_OP_P (DECL_NAME (field))) | |
1558 | field = ovl_make (conv_op_marker, field); | |
783dc739 | 1559 | member_vec->quick_push (field); |
45e3a33d | 1560 | } |
18a01e85 NS |
1561 | } |
1562 | ||
783dc739 NS |
1563 | /* Append all of the enum values of ENUMTYPE to MEMBER_VEC. |
1564 | MEMBER_VEC must have space. */ | |
18a01e85 | 1565 | |
45e3a33d | 1566 | static void |
783dc739 | 1567 | member_vec_append_enum_values (vec<tree, va_gc> *member_vec, tree enumtype) |
18a01e85 | 1568 | { |
1887fb46 NS |
1569 | for (tree values = TYPE_VALUES (enumtype); |
1570 | values; values = TREE_CHAIN (values)) | |
783dc739 | 1571 | member_vec->quick_push (TREE_VALUE (values)); |
45e3a33d NS |
1572 | } |
1573 | ||
783dc739 | 1574 | /* MEMBER_VEC has just had new DECLs added to it, but is sorted. |
45e3a33d NS |
1575 | DeDup adjacent DECLS of the same name. We already dealt with |
1576 | conflict resolution when adding the fields or methods themselves. | |
1577 | There are three cases (which could all be combined): | |
1578 | 1) a TYPE_DECL and non TYPE_DECL. Deploy STAT_HACK as appropriate. | |
1579 | 2) a USING_DECL and an overload. If the USING_DECL is dependent, | |
1580 | it wins. Otherwise the OVERLOAD does. | |
1581 | 3) two USING_DECLS. ... | |
1582 | ||
783dc739 | 1583 | member_name_cmp will have ordered duplicates as |
45e3a33d NS |
1584 | <fns><using><type> */ |
1585 | ||
1586 | static void | |
783dc739 | 1587 | member_vec_dedup (vec<tree, va_gc> *member_vec) |
45e3a33d | 1588 | { |
783dc739 | 1589 | unsigned len = member_vec->length (); |
45e3a33d NS |
1590 | unsigned store = 0; |
1591 | ||
774ae645 JJ |
1592 | if (!len) |
1593 | return; | |
1594 | ||
303f4850 NS |
1595 | tree name = OVL_NAME ((*member_vec)[0]); |
1596 | for (unsigned jx, ix = 0; ix < len; ix = jx) | |
45e3a33d | 1597 | { |
303f4850 | 1598 | tree current = NULL_TREE; |
45e3a33d NS |
1599 | tree to_type = NULL_TREE; |
1600 | tree to_using = NULL_TREE; | |
1601 | tree marker = NULL_TREE; | |
45e3a33d | 1602 | |
303f4850 | 1603 | for (jx = ix; jx < len; jx++) |
45e3a33d | 1604 | { |
303f4850 NS |
1605 | tree next = (*member_vec)[jx]; |
1606 | if (jx != ix) | |
45e3a33d | 1607 | { |
303f4850 NS |
1608 | tree next_name = OVL_NAME (next); |
1609 | if (next_name != name) | |
1610 | { | |
1611 | name = next_name; | |
1612 | break; | |
1613 | } | |
45e3a33d | 1614 | } |
45e3a33d | 1615 | |
303f4850 | 1616 | if (IDENTIFIER_CONV_OP_P (name)) |
45e3a33d | 1617 | { |
303f4850 | 1618 | marker = next; |
45e3a33d NS |
1619 | next = OVL_CHAIN (next); |
1620 | } | |
1621 | ||
1622 | if (TREE_CODE (next) == USING_DECL) | |
1623 | { | |
303f4850 NS |
1624 | if (IDENTIFIER_CTOR_P (name)) |
1625 | /* Dependent inherited ctor. */ | |
1626 | continue; | |
1627 | ||
45e3a33d | 1628 | next = strip_using_decl (next); |
303f4850 | 1629 | if (TREE_CODE (next) == USING_DECL) |
45e3a33d NS |
1630 | { |
1631 | to_using = next; | |
303f4850 | 1632 | continue; |
45e3a33d | 1633 | } |
303f4850 NS |
1634 | |
1635 | if (is_overloaded_fn (next)) | |
1636 | continue; | |
45e3a33d NS |
1637 | } |
1638 | ||
303f4850 NS |
1639 | if (DECL_DECLARES_TYPE_P (next)) |
1640 | { | |
1641 | to_type = next; | |
1642 | continue; | |
1643 | } | |
1644 | ||
1645 | if (!current) | |
1646 | current = next; | |
45e3a33d NS |
1647 | } |
1648 | ||
1649 | if (to_using) | |
1650 | { | |
1651 | if (!current) | |
1652 | current = to_using; | |
1653 | else | |
1654 | current = ovl_make (to_using, current); | |
1655 | } | |
1656 | ||
1657 | if (to_type) | |
1658 | { | |
1659 | if (!current) | |
1660 | current = to_type; | |
1661 | else | |
1662 | current = stat_hack (current, to_type); | |
1663 | } | |
1664 | ||
303f4850 | 1665 | if (current) |
45e3a33d | 1666 | { |
303f4850 NS |
1667 | if (marker) |
1668 | { | |
1669 | OVL_CHAIN (marker) = current; | |
1670 | current = marker; | |
1671 | } | |
1672 | (*member_vec)[store++] = current; | |
45e3a33d | 1673 | } |
45e3a33d NS |
1674 | } |
1675 | ||
1676 | while (store++ < len) | |
783dc739 | 1677 | member_vec->pop (); |
18a01e85 NS |
1678 | } |
1679 | ||
783dc739 NS |
1680 | /* Add the non-function members to CLASSTYPE_MEMBER_VEC. If there is |
1681 | no existing MEMBER_VEC and fewer than 8 fields, do nothing. We | |
45e3a33d NS |
1682 | know there must be at least 1 field -- the self-reference |
1683 | TYPE_DECL, except for anon aggregates, which will have at least | |
1684 | one field. */ | |
41970ff1 NS |
1685 | |
1686 | void | |
45e3a33d | 1687 | set_class_bindings (tree klass, unsigned extra) |
41970ff1 | 1688 | { |
45e3a33d | 1689 | unsigned n_fields = count_class_fields (klass); |
783dc739 | 1690 | vec<tree, va_gc> *member_vec = CLASSTYPE_MEMBER_VEC (klass); |
fe920c2d | 1691 | |
783dc739 | 1692 | if (member_vec || n_fields >= 8) |
18a01e85 | 1693 | { |
45e3a33d | 1694 | /* Append the new fields. */ |
783dc739 NS |
1695 | vec_safe_reserve_exact (member_vec, extra + n_fields); |
1696 | member_vec_append_class_fields (member_vec, klass); | |
45e3a33d NS |
1697 | } |
1698 | ||
783dc739 | 1699 | if (member_vec) |
45e3a33d | 1700 | { |
783dc739 | 1701 | CLASSTYPE_MEMBER_VEC (klass) = member_vec; |
774ae645 | 1702 | member_vec->qsort (member_name_cmp); |
783dc739 | 1703 | member_vec_dedup (member_vec); |
18a01e85 | 1704 | } |
41970ff1 NS |
1705 | } |
1706 | ||
18a01e85 | 1707 | /* Insert lately defined enum ENUMTYPE into KLASS for the sorted case. */ |
41970ff1 NS |
1708 | |
1709 | void | |
d876eb05 | 1710 | insert_late_enum_def_bindings (tree klass, tree enumtype) |
41970ff1 | 1711 | { |
45e3a33d | 1712 | int n_fields; |
783dc739 | 1713 | vec<tree, va_gc> *member_vec = CLASSTYPE_MEMBER_VEC (klass); |
1887fb46 | 1714 | |
45e3a33d | 1715 | /* The enum bindings will already be on the TYPE_FIELDS, so don't |
1887fb46 | 1716 | count them twice. */ |
783dc739 | 1717 | if (!member_vec) |
1887fb46 | 1718 | n_fields = count_class_fields (klass); |
45e3a33d NS |
1719 | else |
1720 | n_fields = list_length (TYPE_VALUES (enumtype)); | |
1887fb46 | 1721 | |
783dc739 | 1722 | if (member_vec || n_fields >= 8) |
18a01e85 | 1723 | { |
783dc739 NS |
1724 | vec_safe_reserve_exact (member_vec, n_fields); |
1725 | if (CLASSTYPE_MEMBER_VEC (klass)) | |
1726 | member_vec_append_enum_values (member_vec, enumtype); | |
1887fb46 | 1727 | else |
783dc739 NS |
1728 | member_vec_append_class_fields (member_vec, klass); |
1729 | CLASSTYPE_MEMBER_VEC (klass) = member_vec; | |
774ae645 | 1730 | member_vec->qsort (member_name_cmp); |
783dc739 | 1731 | member_vec_dedup (member_vec); |
18a01e85 | 1732 | } |
41970ff1 NS |
1733 | } |
1734 | ||
b655c310 NS |
1735 | /* Compute the chain index of a binding_entry given the HASH value of its |
1736 | name and the total COUNT of chains. COUNT is assumed to be a power | |
1737 | of 2. */ | |
9306cccb | 1738 | |
b655c310 | 1739 | #define ENTRY_INDEX(HASH, COUNT) (((HASH) >> 3) & ((COUNT) - 1)) |
c87ceb13 | 1740 | |
b655c310 | 1741 | /* A free list of "binding_entry"s awaiting for re-use. */ |
c87ceb13 | 1742 | |
b655c310 | 1743 | static GTY((deletable)) binding_entry free_binding_entry = NULL; |
c8094d83 | 1744 | |
b655c310 | 1745 | /* The binding oracle; see cp-tree.h. */ |
c87ceb13 | 1746 | |
b655c310 | 1747 | cp_binding_oracle_function *cp_binding_oracle; |
575bfb00 | 1748 | |
b655c310 NS |
1749 | /* If we have a binding oracle, ask it for all namespace-scoped |
1750 | definitions of NAME. */ | |
557831a9 | 1751 | |
b655c310 NS |
1752 | static inline void |
1753 | query_oracle (tree name) | |
557831a9 | 1754 | { |
b655c310 NS |
1755 | if (!cp_binding_oracle) |
1756 | return; | |
557831a9 | 1757 | |
b655c310 NS |
1758 | /* LOOKED_UP holds the set of identifiers that we have already |
1759 | looked up with the oracle. */ | |
1760 | static hash_set<tree> looked_up; | |
1761 | if (looked_up.add (name)) | |
1762 | return; | |
575bfb00 | 1763 | |
b655c310 | 1764 | cp_binding_oracle (CP_ORACLE_IDENTIFIER, name); |
c87ceb13 | 1765 | } |
00e8de68 | 1766 | |
b655c310 | 1767 | /* Create a binding_entry object for (NAME, TYPE). */ |
00e8de68 | 1768 | |
b655c310 NS |
1769 | static inline binding_entry |
1770 | binding_entry_make (tree name, tree type) | |
00e8de68 | 1771 | { |
b655c310 | 1772 | binding_entry entry; |
89bd2c03 | 1773 | |
b655c310 | 1774 | if (free_binding_entry) |
00e8de68 | 1775 | { |
b655c310 NS |
1776 | entry = free_binding_entry; |
1777 | free_binding_entry = entry->chain; | |
00e8de68 | 1778 | } |
c8094d83 | 1779 | else |
b655c310 | 1780 | entry = ggc_alloc<binding_entry_s> (); |
00e8de68 | 1781 | |
b655c310 NS |
1782 | entry->name = name; |
1783 | entry->type = type; | |
1784 | entry->chain = NULL; | |
a5e6b29b | 1785 | |
b655c310 NS |
1786 | return entry; |
1787 | } | |
a5e6b29b | 1788 | |
b655c310 NS |
1789 | /* Put ENTRY back on the free list. */ |
1790 | #if 0 | |
1791 | static inline void | |
1792 | binding_entry_free (binding_entry entry) | |
a5e6b29b | 1793 | { |
b655c310 NS |
1794 | entry->name = NULL; |
1795 | entry->type = NULL; | |
1796 | entry->chain = free_binding_entry; | |
1797 | free_binding_entry = entry; | |
1798 | } | |
1799 | #endif | |
a5e6b29b | 1800 | |
b655c310 NS |
1801 | /* The datatype used to implement the mapping from names to types at |
1802 | a given scope. */ | |
1803 | struct GTY(()) binding_table_s { | |
1804 | /* Array of chains of "binding_entry"s */ | |
1805 | binding_entry * GTY((length ("%h.chain_count"))) chain; | |
2a50edcd | 1806 | |
b655c310 NS |
1807 | /* The number of chains in this table. This is the length of the |
1808 | member "chain" considered as an array. */ | |
1809 | size_t chain_count; | |
a5e6b29b | 1810 | |
b655c310 NS |
1811 | /* Number of "binding_entry"s in this table. */ |
1812 | size_t entry_count; | |
1813 | }; | |
a5e6b29b | 1814 | |
b655c310 | 1815 | /* Construct TABLE with an initial CHAIN_COUNT. */ |
a5e6b29b | 1816 | |
b655c310 NS |
1817 | static inline void |
1818 | binding_table_construct (binding_table table, size_t chain_count) | |
1819 | { | |
1820 | table->chain_count = chain_count; | |
1821 | table->entry_count = 0; | |
1822 | table->chain = ggc_cleared_vec_alloc<binding_entry> (table->chain_count); | |
1823 | } | |
a5e6b29b | 1824 | |
b655c310 NS |
1825 | /* Make TABLE's entries ready for reuse. */ |
1826 | #if 0 | |
1827 | static void | |
1828 | binding_table_free (binding_table table) | |
1829 | { | |
1830 | size_t i; | |
1831 | size_t count; | |
a5e6b29b | 1832 | |
b655c310 NS |
1833 | if (table == NULL) |
1834 | return; | |
a5e6b29b | 1835 | |
b655c310 NS |
1836 | for (i = 0, count = table->chain_count; i < count; ++i) |
1837 | { | |
1838 | binding_entry temp = table->chain[i]; | |
1839 | while (temp != NULL) | |
a5e6b29b | 1840 | { |
b655c310 NS |
1841 | binding_entry entry = temp; |
1842 | temp = entry->chain; | |
1843 | binding_entry_free (entry); | |
a5e6b29b | 1844 | } |
b655c310 NS |
1845 | table->chain[i] = NULL; |
1846 | } | |
1847 | table->entry_count = 0; | |
1848 | } | |
1849 | #endif | |
a5e6b29b | 1850 | |
b655c310 | 1851 | /* Allocate a table with CHAIN_COUNT, assumed to be a power of two. */ |
a5e6b29b | 1852 | |
b655c310 NS |
1853 | static inline binding_table |
1854 | binding_table_new (size_t chain_count) | |
1855 | { | |
1856 | binding_table table = ggc_alloc<binding_table_s> (); | |
1857 | table->chain = NULL; | |
1858 | binding_table_construct (table, chain_count); | |
1859 | return table; | |
1860 | } | |
a5e6b29b | 1861 | |
b655c310 | 1862 | /* Expand TABLE to twice its current chain_count. */ |
a5e6b29b | 1863 | |
b655c310 NS |
1864 | static void |
1865 | binding_table_expand (binding_table table) | |
1866 | { | |
1867 | const size_t old_chain_count = table->chain_count; | |
1868 | const size_t old_entry_count = table->entry_count; | |
1869 | const size_t new_chain_count = 2 * old_chain_count; | |
1870 | binding_entry *old_chains = table->chain; | |
1871 | size_t i; | |
1872 | ||
1873 | binding_table_construct (table, new_chain_count); | |
1874 | for (i = 0; i < old_chain_count; ++i) | |
1875 | { | |
1876 | binding_entry entry = old_chains[i]; | |
1877 | for (; entry != NULL; entry = old_chains[i]) | |
a5e6b29b | 1878 | { |
b655c310 NS |
1879 | const unsigned int hash = IDENTIFIER_HASH_VALUE (entry->name); |
1880 | const size_t j = ENTRY_INDEX (hash, new_chain_count); | |
10827cd8 | 1881 | |
b655c310 NS |
1882 | old_chains[i] = entry->chain; |
1883 | entry->chain = table->chain[j]; | |
1884 | table->chain[j] = entry; | |
1885 | } | |
1886 | } | |
1887 | table->entry_count = old_entry_count; | |
1888 | } | |
10827cd8 | 1889 | |
b655c310 | 1890 | /* Insert a binding for NAME to TYPE into TABLE. */ |
10827cd8 | 1891 | |
b655c310 NS |
1892 | static void |
1893 | binding_table_insert (binding_table table, tree name, tree type) | |
1894 | { | |
1895 | const unsigned int hash = IDENTIFIER_HASH_VALUE (name); | |
1896 | const size_t i = ENTRY_INDEX (hash, table->chain_count); | |
1897 | binding_entry entry = binding_entry_make (name, type); | |
c8094d83 | 1898 | |
b655c310 NS |
1899 | entry->chain = table->chain[i]; |
1900 | table->chain[i] = entry; | |
1901 | ++table->entry_count; | |
b1a19c7c | 1902 | |
b655c310 NS |
1903 | if (3 * table->chain_count < 5 * table->entry_count) |
1904 | binding_table_expand (table); | |
1905 | } | |
a5e6b29b | 1906 | |
b655c310 | 1907 | /* Return the binding_entry, if any, that maps NAME. */ |
c8094d83 | 1908 | |
b655c310 NS |
1909 | binding_entry |
1910 | binding_table_find (binding_table table, tree name) | |
1911 | { | |
1912 | const unsigned int hash = IDENTIFIER_HASH_VALUE (name); | |
1913 | binding_entry entry = table->chain[ENTRY_INDEX (hash, table->chain_count)]; | |
c8094d83 | 1914 | |
b655c310 NS |
1915 | while (entry != NULL && entry->name != name) |
1916 | entry = entry->chain; | |
a5e6b29b | 1917 | |
b655c310 NS |
1918 | return entry; |
1919 | } | |
ecba6c56 | 1920 | |
b655c310 | 1921 | /* Apply PROC -- with DATA -- to all entries in TABLE. */ |
a5e6b29b | 1922 | |
b655c310 NS |
1923 | void |
1924 | binding_table_foreach (binding_table table, bt_foreach_proc proc, void *data) | |
1925 | { | |
1926 | size_t chain_count; | |
1927 | size_t i; | |
a5e6b29b | 1928 | |
b655c310 NS |
1929 | if (!table) |
1930 | return; | |
a5e6b29b | 1931 | |
b655c310 NS |
1932 | chain_count = table->chain_count; |
1933 | for (i = 0; i < chain_count; ++i) | |
1934 | { | |
1935 | binding_entry entry = table->chain[i]; | |
1936 | for (; entry != NULL; entry = entry->chain) | |
1937 | proc (entry, data); | |
1938 | } | |
1939 | } | |
1940 | \f | |
1941 | #ifndef ENABLE_SCOPE_CHECKING | |
1942 | # define ENABLE_SCOPE_CHECKING 0 | |
1943 | #else | |
1944 | # define ENABLE_SCOPE_CHECKING 1 | |
1945 | #endif | |
199b7a35 | 1946 | |
b655c310 | 1947 | /* A free list of "cxx_binding"s, connected by their PREVIOUS. */ |
f7cbd40e | 1948 | |
b655c310 | 1949 | static GTY((deletable)) cxx_binding *free_bindings; |
f7cbd40e | 1950 | |
b655c310 NS |
1951 | /* Initialize VALUE and TYPE field for BINDING, and set the PREVIOUS |
1952 | field to NULL. */ | |
d0940d56 | 1953 | |
b655c310 NS |
1954 | static inline void |
1955 | cxx_binding_init (cxx_binding *binding, tree value, tree type) | |
1956 | { | |
1957 | binding->value = value; | |
1958 | binding->type = type; | |
1959 | binding->previous = NULL; | |
1960 | } | |
a5e6b29b | 1961 | |
b655c310 | 1962 | /* (GC)-allocate a binding object with VALUE and TYPE member initialized. */ |
3797cb21 | 1963 | |
b655c310 NS |
1964 | static cxx_binding * |
1965 | cxx_binding_make (tree value, tree type) | |
1966 | { | |
1967 | cxx_binding *binding; | |
1968 | if (free_bindings) | |
1969 | { | |
1970 | binding = free_bindings; | |
1971 | free_bindings = binding->previous; | |
1972 | } | |
1973 | else | |
1974 | binding = ggc_alloc<cxx_binding> (); | |
a5e6b29b | 1975 | |
b655c310 | 1976 | cxx_binding_init (binding, value, type); |
a5e6b29b | 1977 | |
b655c310 NS |
1978 | return binding; |
1979 | } | |
a5e6b29b | 1980 | |
b655c310 | 1981 | /* Put BINDING back on the free list. */ |
a5e6b29b | 1982 | |
b655c310 NS |
1983 | static inline void |
1984 | cxx_binding_free (cxx_binding *binding) | |
1985 | { | |
1986 | binding->scope = NULL; | |
1987 | binding->previous = free_bindings; | |
1988 | free_bindings = binding; | |
1989 | } | |
a5e6b29b | 1990 | |
b655c310 NS |
1991 | /* Create a new binding for NAME (with the indicated VALUE and TYPE |
1992 | bindings) in the class scope indicated by SCOPE. */ | |
a5e6b29b | 1993 | |
b655c310 NS |
1994 | static cxx_binding * |
1995 | new_class_binding (tree name, tree value, tree type, cp_binding_level *scope) | |
1996 | { | |
1997 | cp_class_binding cb = {cxx_binding_make (value, type), name}; | |
1998 | cxx_binding *binding = cb.base; | |
1999 | vec_safe_push (scope->class_shadowed, cb); | |
2000 | binding->scope = scope; | |
2001 | return binding; | |
2002 | } | |
a5e6b29b | 2003 | |
b655c310 NS |
2004 | /* Make DECL the innermost binding for ID. The LEVEL is the binding |
2005 | level at which this declaration is being bound. */ | |
a5e6b29b | 2006 | |
b655c310 NS |
2007 | void |
2008 | push_binding (tree id, tree decl, cp_binding_level* level) | |
2009 | { | |
2010 | cxx_binding *binding; | |
a5e6b29b | 2011 | |
b655c310 NS |
2012 | if (level != class_binding_level) |
2013 | { | |
2014 | binding = cxx_binding_make (decl, NULL_TREE); | |
2015 | binding->scope = level; | |
2016 | } | |
2017 | else | |
2018 | binding = new_class_binding (id, decl, /*type=*/NULL_TREE, level); | |
a5e6b29b | 2019 | |
b655c310 NS |
2020 | /* Now, fill in the binding information. */ |
2021 | binding->previous = IDENTIFIER_BINDING (id); | |
2022 | INHERITED_VALUE_BINDING_P (binding) = 0; | |
2023 | LOCAL_BINDING_P (binding) = (level != class_binding_level); | |
a5e6b29b | 2024 | |
b655c310 NS |
2025 | /* And put it on the front of the list of bindings for ID. */ |
2026 | IDENTIFIER_BINDING (id) = binding; | |
575bfb00 LC |
2027 | } |
2028 | ||
b655c310 NS |
2029 | /* Remove the binding for DECL which should be the innermost binding |
2030 | for ID. */ | |
575bfb00 | 2031 | |
b655c310 | 2032 | void |
9c82d7b6 | 2033 | pop_local_binding (tree id, tree decl) |
575bfb00 | 2034 | { |
b655c310 | 2035 | cxx_binding *binding; |
d63d5d0c | 2036 | |
b655c310 NS |
2037 | if (id == NULL_TREE) |
2038 | /* It's easiest to write the loops that call this function without | |
2039 | checking whether or not the entities involved have names. We | |
2040 | get here for such an entity. */ | |
2041 | return; | |
d63d5d0c | 2042 | |
b655c310 NS |
2043 | /* Get the innermost binding for ID. */ |
2044 | binding = IDENTIFIER_BINDING (id); | |
a5e6b29b | 2045 | |
b655c310 NS |
2046 | /* The name should be bound. */ |
2047 | gcc_assert (binding != NULL); | |
a5e6b29b | 2048 | |
b655c310 NS |
2049 | /* The DECL will be either the ordinary binding or the type |
2050 | binding for this identifier. Remove that binding. */ | |
2051 | if (binding->value == decl) | |
2052 | binding->value = NULL_TREE; | |
a5e6b29b | 2053 | else |
b655c310 NS |
2054 | { |
2055 | gcc_assert (binding->type == decl); | |
2056 | binding->type = NULL_TREE; | |
2057 | } | |
00e8de68 | 2058 | |
b655c310 | 2059 | if (!binding->value && !binding->type) |
00e8de68 | 2060 | { |
b655c310 NS |
2061 | /* We're completely done with the innermost binding for this |
2062 | identifier. Unhook it from the list of bindings. */ | |
2063 | IDENTIFIER_BINDING (id) = binding->previous; | |
2064 | ||
2065 | /* Add it to the free list. */ | |
2066 | cxx_binding_free (binding); | |
00e8de68 | 2067 | } |
b655c310 | 2068 | } |
00e8de68 | 2069 | |
b655c310 NS |
2070 | /* Remove the bindings for the decls of the current level and leave |
2071 | the current scope. */ | |
00e8de68 | 2072 | |
b655c310 NS |
2073 | void |
2074 | pop_bindings_and_leave_scope (void) | |
2075 | { | |
9c82d7b6 | 2076 | for (tree t = get_local_decls (); t; t = DECL_CHAIN (t)) |
9d029ddf NS |
2077 | { |
2078 | tree decl = TREE_CODE (t) == TREE_LIST ? TREE_VALUE (t) : t; | |
2079 | tree name = OVL_NAME (decl); | |
2080 | ||
2081 | pop_local_binding (name, decl); | |
2082 | } | |
2083 | ||
b655c310 | 2084 | leave_scope (); |
00e8de68 | 2085 | } |
a5e6b29b | 2086 | |
b655c310 NS |
2087 | /* Strip non dependent using declarations. If DECL is dependent, |
2088 | surreptitiously create a typename_type and return it. */ | |
a5e6b29b GDR |
2089 | |
2090 | tree | |
b655c310 | 2091 | strip_using_decl (tree decl) |
a5e6b29b | 2092 | { |
b655c310 NS |
2093 | if (decl == NULL_TREE) |
2094 | return NULL_TREE; | |
a5e6b29b | 2095 | |
b655c310 NS |
2096 | while (TREE_CODE (decl) == USING_DECL && !DECL_DEPENDENT_P (decl)) |
2097 | decl = USING_DECL_DECLS (decl); | |
a5e6b29b | 2098 | |
b655c310 NS |
2099 | if (TREE_CODE (decl) == USING_DECL && DECL_DEPENDENT_P (decl) |
2100 | && USING_DECL_TYPENAME_P (decl)) | |
a5e6b29b | 2101 | { |
b655c310 NS |
2102 | /* We have found a type introduced by a using |
2103 | declaration at class scope that refers to a dependent | |
2104 | type. | |
2105 | ||
2106 | using typename :: [opt] nested-name-specifier unqualified-id ; | |
2107 | */ | |
2108 | decl = make_typename_type (TREE_TYPE (decl), | |
2109 | DECL_NAME (decl), | |
2110 | typename_type, tf_error); | |
2111 | if (decl != error_mark_node) | |
2112 | decl = TYPE_NAME (decl); | |
a5e6b29b GDR |
2113 | } |
2114 | ||
b655c310 NS |
2115 | return decl; |
2116 | } | |
a5e6b29b | 2117 | |
ef4c5e78 NS |
2118 | /* Return true if OVL is an overload for an anticipated builtin. */ |
2119 | ||
2120 | static bool | |
2121 | anticipated_builtin_p (tree ovl) | |
2122 | { | |
2123 | if (TREE_CODE (ovl) != OVERLOAD) | |
2124 | return false; | |
2125 | ||
2126 | if (!OVL_HIDDEN_P (ovl)) | |
2127 | return false; | |
2128 | ||
2129 | tree fn = OVL_FUNCTION (ovl); | |
2130 | gcc_checking_assert (DECL_ANTICIPATED (fn)); | |
2131 | ||
2132 | if (DECL_HIDDEN_FRIEND_P (fn)) | |
2133 | return false; | |
2134 | ||
2135 | return true; | |
2136 | } | |
2137 | ||
b655c310 NS |
2138 | /* BINDING records an existing declaration for a name in the current scope. |
2139 | But, DECL is another declaration for that same identifier in the | |
2140 | same scope. This is the `struct stat' hack whereby a non-typedef | |
2141 | class name or enum-name can be bound at the same level as some other | |
2142 | kind of entity. | |
2143 | 3.3.7/1 | |
ae5cbc33 | 2144 | |
b655c310 NS |
2145 | A class name (9.1) or enumeration name (7.2) can be hidden by the |
2146 | name of an object, function, or enumerator declared in the same scope. | |
2147 | If a class or enumeration name and an object, function, or enumerator | |
2148 | are declared in the same scope (in any order) with the same name, the | |
2149 | class or enumeration name is hidden wherever the object, function, or | |
2150 | enumerator name is visible. | |
ae5cbc33 | 2151 | |
b655c310 NS |
2152 | It's the responsibility of the caller to check that |
2153 | inserting this name is valid here. Returns nonzero if the new binding | |
2154 | was successful. */ | |
2155 | ||
2156 | static bool | |
2157 | supplement_binding_1 (cxx_binding *binding, tree decl) | |
2158 | { | |
2159 | tree bval = binding->value; | |
2160 | bool ok = true; | |
2161 | tree target_bval = strip_using_decl (bval); | |
2162 | tree target_decl = strip_using_decl (decl); | |
2163 | ||
2164 | if (TREE_CODE (target_decl) == TYPE_DECL && DECL_ARTIFICIAL (target_decl) | |
2165 | && target_decl != target_bval | |
2166 | && (TREE_CODE (target_bval) != TYPE_DECL | |
2167 | /* We allow pushing an enum multiple times in a class | |
2168 | template in order to handle late matching of underlying | |
2169 | type on an opaque-enum-declaration followed by an | |
2170 | enum-specifier. */ | |
2171 | || (processing_template_decl | |
2172 | && TREE_CODE (TREE_TYPE (target_decl)) == ENUMERAL_TYPE | |
2173 | && TREE_CODE (TREE_TYPE (target_bval)) == ENUMERAL_TYPE | |
2174 | && (dependent_type_p (ENUM_UNDERLYING_TYPE | |
2175 | (TREE_TYPE (target_decl))) | |
2176 | || dependent_type_p (ENUM_UNDERLYING_TYPE | |
2177 | (TREE_TYPE (target_bval))))))) | |
2178 | /* The new name is the type name. */ | |
2179 | binding->type = decl; | |
2180 | else if (/* TARGET_BVAL is null when push_class_level_binding moves | |
2181 | an inherited type-binding out of the way to make room | |
2182 | for a new value binding. */ | |
2183 | !target_bval | |
2184 | /* TARGET_BVAL is error_mark_node when TARGET_DECL's name | |
2185 | has been used in a non-class scope prior declaration. | |
2186 | In that case, we should have already issued a | |
2187 | diagnostic; for graceful error recovery purpose, pretend | |
2188 | this was the intended declaration for that name. */ | |
2189 | || target_bval == error_mark_node | |
2190 | /* If TARGET_BVAL is anticipated but has not yet been | |
2191 | declared, pretend it is not there at all. */ | |
ef4c5e78 | 2192 | || anticipated_builtin_p (target_bval)) |
b655c310 NS |
2193 | binding->value = decl; |
2194 | else if (TREE_CODE (target_bval) == TYPE_DECL | |
2195 | && DECL_ARTIFICIAL (target_bval) | |
2196 | && target_decl != target_bval | |
2197 | && (TREE_CODE (target_decl) != TYPE_DECL | |
2198 | || same_type_p (TREE_TYPE (target_decl), | |
2199 | TREE_TYPE (target_bval)))) | |
a5e6b29b | 2200 | { |
b655c310 NS |
2201 | /* The old binding was a type name. It was placed in |
2202 | VALUE field because it was thought, at the point it was | |
2203 | declared, to be the only entity with such a name. Move the | |
2204 | type name into the type slot; it is now hidden by the new | |
2205 | binding. */ | |
2206 | binding->type = bval; | |
2207 | binding->value = decl; | |
2208 | binding->value_is_inherited = false; | |
a5e6b29b | 2209 | } |
b655c310 NS |
2210 | else if (TREE_CODE (target_bval) == TYPE_DECL |
2211 | && TREE_CODE (target_decl) == TYPE_DECL | |
2212 | && DECL_NAME (target_decl) == DECL_NAME (target_bval) | |
2213 | && binding->scope->kind != sk_class | |
2214 | && (same_type_p (TREE_TYPE (target_decl), TREE_TYPE (target_bval)) | |
2215 | /* If either type involves template parameters, we must | |
2216 | wait until instantiation. */ | |
2217 | || uses_template_parms (TREE_TYPE (target_decl)) | |
2218 | || uses_template_parms (TREE_TYPE (target_bval)))) | |
2219 | /* We have two typedef-names, both naming the same type to have | |
2220 | the same name. In general, this is OK because of: | |
a5e6b29b | 2221 | |
b655c310 | 2222 | [dcl.typedef] |
00e8de68 | 2223 | |
b655c310 NS |
2224 | In a given scope, a typedef specifier can be used to redefine |
2225 | the name of any type declared in that scope to refer to the | |
2226 | type to which it already refers. | |
00e8de68 | 2227 | |
b655c310 NS |
2228 | However, in class scopes, this rule does not apply due to the |
2229 | stricter language in [class.mem] prohibiting redeclarations of | |
2230 | members. */ | |
2231 | ok = false; | |
2232 | /* There can be two block-scope declarations of the same variable, | |
2233 | so long as they are `extern' declarations. However, there cannot | |
2234 | be two declarations of the same static data member: | |
00e8de68 | 2235 | |
b655c310 | 2236 | [class.mem] |
00e8de68 | 2237 | |
b655c310 NS |
2238 | A member shall not be declared twice in the |
2239 | member-specification. */ | |
2240 | else if (VAR_P (target_decl) | |
2241 | && VAR_P (target_bval) | |
2242 | && DECL_EXTERNAL (target_decl) && DECL_EXTERNAL (target_bval) | |
2243 | && !DECL_CLASS_SCOPE_P (target_decl)) | |
2244 | { | |
2245 | duplicate_decls (decl, binding->value, /*newdecl_is_friend=*/false); | |
2246 | ok = false; | |
2247 | } | |
2248 | else if (TREE_CODE (decl) == NAMESPACE_DECL | |
2249 | && TREE_CODE (bval) == NAMESPACE_DECL | |
2250 | && DECL_NAMESPACE_ALIAS (decl) | |
2251 | && DECL_NAMESPACE_ALIAS (bval) | |
2252 | && ORIGINAL_NAMESPACE (bval) == ORIGINAL_NAMESPACE (decl)) | |
2253 | /* [namespace.alias] | |
00e8de68 | 2254 | |
b655c310 NS |
2255 | In a declarative region, a namespace-alias-definition can be |
2256 | used to redefine a namespace-alias declared in that declarative | |
2257 | region to refer only to the namespace to which it already | |
2258 | refers. */ | |
2259 | ok = false; | |
b655c310 NS |
2260 | else |
2261 | { | |
2262 | if (!error_operand_p (bval)) | |
2263 | diagnose_name_conflict (decl, bval); | |
2264 | ok = false; | |
2265 | } | |
00e8de68 | 2266 | |
b655c310 | 2267 | return ok; |
00e8de68 GDR |
2268 | } |
2269 | ||
b655c310 NS |
2270 | /* Diagnose a name conflict between DECL and BVAL. */ |
2271 | ||
00e8de68 | 2272 | static void |
b655c310 NS |
2273 | diagnose_name_conflict (tree decl, tree bval) |
2274 | { | |
2275 | if (TREE_CODE (decl) == TREE_CODE (bval) | |
71bbbd13 | 2276 | && TREE_CODE (decl) != NAMESPACE_DECL |
9d029ddf | 2277 | && !DECL_DECLARES_FUNCTION_P (decl) |
71bbbd13 NS |
2278 | && (TREE_CODE (decl) != TYPE_DECL |
2279 | || DECL_ARTIFICIAL (decl) == DECL_ARTIFICIAL (bval)) | |
9d029ddf | 2280 | && CP_DECL_CONTEXT (decl) == CP_DECL_CONTEXT (bval)) |
b655c310 | 2281 | error ("redeclaration of %q#D", decl); |
00e8de68 | 2282 | else |
b655c310 NS |
2283 | error ("%q#D conflicts with a previous declaration", decl); |
2284 | ||
2285 | inform (location_of (bval), "previous declaration %q#D", bval); | |
00e8de68 GDR |
2286 | } |
2287 | ||
b655c310 | 2288 | /* Wrapper for supplement_binding_1. */ |
00e8de68 | 2289 | |
b655c310 NS |
2290 | static bool |
2291 | supplement_binding (cxx_binding *binding, tree decl) | |
00e8de68 | 2292 | { |
b655c310 NS |
2293 | bool ret; |
2294 | bool subtime = timevar_cond_start (TV_NAME_LOOKUP); | |
2295 | ret = supplement_binding_1 (binding, decl); | |
2296 | timevar_cond_stop (TV_NAME_LOOKUP, subtime); | |
2297 | return ret; | |
00e8de68 GDR |
2298 | } |
2299 | ||
9d029ddf NS |
2300 | /* Replace BINDING's current value on its scope's name list with |
2301 | NEWVAL. */ | |
2302 | ||
2303 | static void | |
2304 | update_local_overload (cxx_binding *binding, tree newval) | |
2305 | { | |
2306 | tree *d; | |
2307 | ||
2308 | for (d = &binding->scope->names; ; d = &TREE_CHAIN (*d)) | |
2309 | if (*d == binding->value) | |
2310 | { | |
2311 | /* Stitch new list node in. */ | |
2312 | *d = tree_cons (NULL_TREE, NULL_TREE, TREE_CHAIN (*d)); | |
2313 | break; | |
2314 | } | |
2315 | else if (TREE_CODE (*d) == TREE_LIST && TREE_VALUE (*d) == binding->value) | |
2316 | break; | |
2317 | ||
2318 | TREE_VALUE (*d) = newval; | |
2319 | } | |
2320 | ||
2321 | /* Compares the parameter-type-lists of ONE and TWO and | |
2322 | returns false if they are different. If the DECLs are template | |
2323 | functions, the return types and the template parameter lists are | |
2324 | compared too (DR 565). */ | |
2325 | ||
2326 | static bool | |
2327 | matching_fn_p (tree one, tree two) | |
2328 | { | |
2329 | if (!compparms (TYPE_ARG_TYPES (TREE_TYPE (one)), | |
2330 | TYPE_ARG_TYPES (TREE_TYPE (two)))) | |
2331 | return false; | |
2332 | ||
2333 | if (TREE_CODE (one) == TEMPLATE_DECL | |
2334 | && TREE_CODE (two) == TEMPLATE_DECL) | |
2335 | { | |
2336 | /* Compare template parms. */ | |
2337 | if (!comp_template_parms (DECL_TEMPLATE_PARMS (one), | |
2338 | DECL_TEMPLATE_PARMS (two))) | |
2339 | return false; | |
2340 | ||
2341 | /* And return type. */ | |
2342 | if (!same_type_p (TREE_TYPE (TREE_TYPE (one)), | |
2343 | TREE_TYPE (TREE_TYPE (two)))) | |
2344 | return false; | |
2345 | } | |
2346 | ||
2347 | return true; | |
2348 | } | |
2349 | ||
3c9cca88 | 2350 | /* Push DECL into nonclass LEVEL BINDING or SLOT. OLD is the current |
3a9cc685 NS |
2351 | binding value (possibly with anticipated builtins stripped). |
2352 | Diagnose conflicts and return updated decl. */ | |
2353 | ||
2354 | static tree | |
3c9cca88 | 2355 | update_binding (cp_binding_level *level, cxx_binding *binding, tree *slot, |
3a9cc685 NS |
2356 | tree old, tree decl, bool is_friend) |
2357 | { | |
2358 | tree to_val = decl; | |
e2f35333 NS |
2359 | tree old_type = slot ? MAYBE_STAT_TYPE (*slot) : binding->type; |
2360 | tree to_type = old_type; | |
3a9cc685 | 2361 | |
3c9cca88 NS |
2362 | gcc_assert (level->kind == sk_namespace ? !binding |
2363 | : level->kind != sk_class && !slot); | |
3a9cc685 NS |
2364 | if (old == error_mark_node) |
2365 | old = NULL_TREE; | |
2366 | ||
e2f35333 NS |
2367 | if (TREE_CODE (decl) == TYPE_DECL && DECL_ARTIFICIAL (decl)) |
2368 | { | |
2369 | tree other = to_type; | |
2370 | ||
2371 | if (old && TREE_CODE (old) == TYPE_DECL && DECL_ARTIFICIAL (old)) | |
2372 | other = old; | |
2373 | ||
2374 | /* Pushing an artificial typedef. See if this matches either | |
2375 | the type slot or the old value slot. */ | |
2376 | if (!other) | |
2377 | ; | |
2378 | else if (same_type_p (TREE_TYPE (other), TREE_TYPE (decl))) | |
2379 | /* Two artificial decls to same type. Do nothing. */ | |
2380 | return other; | |
2381 | else | |
2382 | goto conflict; | |
2383 | ||
2384 | if (old) | |
2385 | { | |
2386 | /* Slide decl into the type slot, keep old unaltered */ | |
2387 | to_type = decl; | |
2388 | to_val = old; | |
2389 | goto done; | |
2390 | } | |
2391 | } | |
2392 | ||
3a9cc685 NS |
2393 | if (old && TREE_CODE (old) == TYPE_DECL && DECL_ARTIFICIAL (old)) |
2394 | { | |
e2f35333 | 2395 | /* Slide old into the type slot. */ |
3a9cc685 NS |
2396 | to_type = old; |
2397 | old = NULL_TREE; | |
2398 | } | |
2399 | ||
2400 | if (DECL_DECLARES_FUNCTION_P (decl)) | |
2401 | { | |
2402 | if (!old) | |
2403 | ; | |
2404 | else if (OVL_P (old)) | |
2405 | { | |
2406 | for (ovl_iterator iter (old); iter; ++iter) | |
2407 | { | |
2408 | tree fn = *iter; | |
2409 | ||
2410 | if (iter.using_p () && matching_fn_p (fn, decl)) | |
2411 | { | |
2412 | /* If a function declaration in namespace scope or | |
2413 | block scope has the same name and the same | |
2414 | parameter-type- list (8.3.5) as a function | |
2415 | introduced by a using-declaration, and the | |
2416 | declarations do not declare the same function, | |
2417 | the program is ill-formed. [namespace.udecl]/14 */ | |
2418 | if (tree match = duplicate_decls (decl, fn, is_friend)) | |
2419 | return match; | |
2420 | else | |
2421 | /* FIXME: To preserve existing error behavior, we | |
2422 | still push the decl. This might change. */ | |
2423 | diagnose_name_conflict (decl, fn); | |
2424 | } | |
2425 | } | |
2426 | } | |
2427 | else | |
2428 | goto conflict; | |
2429 | ||
c14c0b15 NS |
2430 | if (to_type != old_type |
2431 | && warn_shadow | |
2432 | && MAYBE_CLASS_TYPE_P (TREE_TYPE (to_type)) | |
2433 | && !(DECL_IN_SYSTEM_HEADER (decl) | |
2434 | && DECL_IN_SYSTEM_HEADER (to_type))) | |
2435 | warning (OPT_Wshadow, "%q#D hides constructor for %q#D", | |
2436 | decl, to_type); | |
2437 | ||
3a9cc685 NS |
2438 | to_val = ovl_insert (decl, old); |
2439 | } | |
3a9cc685 NS |
2440 | else if (!old) |
2441 | ; | |
3a9cc685 NS |
2442 | else if (TREE_CODE (old) != TREE_CODE (decl)) |
2443 | /* Different kinds of decls conflict. */ | |
2444 | goto conflict; | |
2445 | else if (TREE_CODE (old) == TYPE_DECL) | |
2446 | { | |
e2f35333 | 2447 | if (same_type_p (TREE_TYPE (old), TREE_TYPE (decl))) |
3a9cc685 NS |
2448 | /* Two type decls to the same type. Do nothing. */ |
2449 | return old; | |
2450 | else | |
2451 | goto conflict; | |
2452 | } | |
2453 | else if (TREE_CODE (old) == NAMESPACE_DECL) | |
2454 | { | |
71bbbd13 NS |
2455 | /* Two maybe-aliased namespaces. If they're to the same target |
2456 | namespace, that's ok. */ | |
2457 | if (ORIGINAL_NAMESPACE (old) != ORIGINAL_NAMESPACE (decl)) | |
3a9cc685 | 2458 | goto conflict; |
71bbbd13 NS |
2459 | |
2460 | /* The new one must be an alias at this point. */ | |
2461 | gcc_assert (DECL_NAMESPACE_ALIAS (decl)); | |
2462 | return old; | |
3a9cc685 NS |
2463 | } |
2464 | else if (TREE_CODE (old) == VAR_DECL) | |
2465 | { | |
2466 | /* There can be two block-scope declarations of the same | |
2467 | variable, so long as they are `extern' declarations. */ | |
2468 | if (!DECL_EXTERNAL (old) || !DECL_EXTERNAL (decl)) | |
2469 | goto conflict; | |
2470 | else if (tree match = duplicate_decls (decl, old, false)) | |
2471 | return match; | |
2472 | else | |
2473 | goto conflict; | |
2474 | } | |
2475 | else | |
2476 | { | |
2477 | conflict: | |
2478 | diagnose_name_conflict (decl, old); | |
2479 | to_val = NULL_TREE; | |
2480 | } | |
2481 | ||
e2f35333 | 2482 | done: |
3a9cc685 NS |
2483 | if (to_val) |
2484 | { | |
7cd9cf2f NS |
2485 | if (level->kind == sk_namespace || to_type == decl || to_val == decl) |
2486 | add_decl_to_level (level, decl); | |
3a9cc685 NS |
2487 | else |
2488 | { | |
7cd9cf2f NS |
2489 | gcc_checking_assert (binding->value && OVL_P (binding->value)); |
2490 | update_local_overload (binding, to_val); | |
3a9cc685 NS |
2491 | } |
2492 | ||
3c9cca88 NS |
2493 | if (slot) |
2494 | { | |
2495 | if (STAT_HACK_P (*slot)) | |
2496 | { | |
e2f35333 | 2497 | STAT_TYPE (*slot) = to_type; |
3c9cca88 NS |
2498 | STAT_DECL (*slot) = to_val; |
2499 | } | |
2500 | else if (to_type) | |
2501 | *slot = stat_hack (to_val, to_type); | |
2502 | else | |
2503 | *slot = to_val; | |
2504 | } | |
2505 | else | |
2506 | { | |
e2f35333 | 2507 | binding->type = to_type; |
3c9cca88 NS |
2508 | binding->value = to_val; |
2509 | } | |
3a9cc685 NS |
2510 | } |
2511 | ||
2512 | return decl; | |
2513 | } | |
2514 | ||
7cd6ea64 | 2515 | /* Table of identifiers to extern C declarations (or LISTS thereof). */ |
539f481a | 2516 | |
7cd6ea64 | 2517 | static GTY(()) hash_table<named_decl_hash> *extern_c_decls; |
539f481a | 2518 | |
7cd6ea64 NS |
2519 | /* DECL has C linkage. If we have an existing instance, make sure the |
2520 | new one is compatible. Make sure it has the same exception | |
2521 | specification [7.5, 7.6]. Add DECL to the map. */ | |
539f481a NS |
2522 | |
2523 | static void | |
2524 | check_extern_c_conflict (tree decl) | |
2525 | { | |
2526 | /* Ignore artificial or system header decls. */ | |
2527 | if (DECL_ARTIFICIAL (decl) || DECL_IN_SYSTEM_HEADER (decl)) | |
2528 | return; | |
2529 | ||
38dff921 JM |
2530 | /* This only applies to decls at namespace scope. */ |
2531 | if (!DECL_NAMESPACE_SCOPE_P (decl)) | |
2532 | return; | |
2533 | ||
7cd6ea64 NS |
2534 | if (!extern_c_decls) |
2535 | extern_c_decls = hash_table<named_decl_hash>::create_ggc (127); | |
539f481a | 2536 | |
7cd6ea64 | 2537 | tree *slot = extern_c_decls |
9bc3f420 NS |
2538 | ->find_slot_with_hash (DECL_NAME (decl), |
2539 | IDENTIFIER_HASH_VALUE (DECL_NAME (decl)), INSERT); | |
2540 | if (tree old = *slot) | |
539f481a | 2541 | { |
9bc3f420 NS |
2542 | if (TREE_CODE (old) == OVERLOAD) |
2543 | old = OVL_FUNCTION (old); | |
539f481a NS |
2544 | |
2545 | int mismatch = 0; | |
2546 | if (DECL_CONTEXT (old) == DECL_CONTEXT (decl)) | |
2547 | ; /* If they're in the same context, we'll have already complained | |
2548 | about a (possible) mismatch, when inserting the decl. */ | |
2549 | else if (!decls_match (decl, old)) | |
2550 | mismatch = 1; | |
7cd6ea64 NS |
2551 | else if (TREE_CODE (decl) == FUNCTION_DECL |
2552 | && !comp_except_specs (TYPE_RAISES_EXCEPTIONS (TREE_TYPE (old)), | |
2553 | TYPE_RAISES_EXCEPTIONS (TREE_TYPE (decl)), | |
2554 | ce_normal)) | |
539f481a NS |
2555 | mismatch = -1; |
2556 | else if (DECL_ASSEMBLER_NAME_SET_P (old)) | |
2557 | SET_DECL_ASSEMBLER_NAME (decl, DECL_ASSEMBLER_NAME (old)); | |
2558 | ||
2559 | if (mismatch) | |
2560 | { | |
2561 | pedwarn (input_location, 0, | |
7cd6ea64 NS |
2562 | "conflicting C language linkage declaration %q#D", decl); |
2563 | inform (DECL_SOURCE_LOCATION (old), | |
2564 | "previous declaration %q#D", old); | |
539f481a | 2565 | if (mismatch < 0) |
7cd6ea64 NS |
2566 | inform (input_location, |
2567 | "due to different exception specifications"); | |
539f481a NS |
2568 | } |
2569 | else | |
9bc3f420 NS |
2570 | { |
2571 | if (old == *slot) | |
2572 | /* The hash table expects OVERLOADS, so construct one with | |
2573 | OLD as both the function and the chain. This allocate | |
2574 | an excess OVERLOAD node, but it's rare to have multiple | |
2575 | extern "C" decls of the same name. And we save | |
2576 | complicating the hash table logic (which is used | |
2577 | elsewhere). */ | |
2578 | *slot = ovl_make (old, old); | |
2579 | ||
2580 | slot = &OVL_CHAIN (*slot); | |
2581 | ||
2582 | /* Chain it on for c_linkage_binding's use. */ | |
2583 | *slot = tree_cons (NULL_TREE, decl, *slot); | |
2584 | } | |
539f481a | 2585 | } |
9bc3f420 NS |
2586 | else |
2587 | *slot = decl; | |
539f481a NS |
2588 | } |
2589 | ||
2590 | /* Returns a list of C-linkage decls with the name NAME. Used in | |
2591 | c-family/c-pragma.c to implement redefine_extname pragma. */ | |
2592 | ||
2593 | tree | |
2594 | c_linkage_bindings (tree name) | |
2595 | { | |
7cd6ea64 NS |
2596 | if (extern_c_decls) |
2597 | if (tree *slot = extern_c_decls | |
9bc3f420 NS |
2598 | ->find_slot_with_hash (name, IDENTIFIER_HASH_VALUE (name), NO_INSERT)) |
2599 | { | |
2600 | tree result = *slot; | |
2601 | if (TREE_CODE (result) == OVERLOAD) | |
2602 | result = OVL_CHAIN (result); | |
2603 | return result; | |
2604 | } | |
2605 | ||
539f481a NS |
2606 | return NULL_TREE; |
2607 | } | |
2608 | ||
c0c24822 NS |
2609 | /* DECL is being declared at a local scope. Emit suitable shadow |
2610 | warnings. */ | |
2611 | ||
2612 | static void | |
2613 | check_local_shadow (tree decl) | |
2614 | { | |
2615 | /* Don't complain about the parms we push and then pop | |
2616 | while tentatively parsing a function declarator. */ | |
2617 | if (TREE_CODE (decl) == PARM_DECL && !DECL_CONTEXT (decl)) | |
2618 | return; | |
2619 | ||
2620 | /* Inline decls shadow nothing. */ | |
2621 | if (DECL_FROM_INLINE (decl)) | |
2622 | return; | |
2623 | ||
2624 | /* External decls are something else. */ | |
2625 | if (DECL_EXTERNAL (decl)) | |
2626 | return; | |
2627 | ||
2628 | tree old = NULL_TREE; | |
2629 | cp_binding_level *old_scope = NULL; | |
2630 | if (cxx_binding *binding = outer_binding (DECL_NAME (decl), NULL, true)) | |
2631 | { | |
2632 | old = binding->value; | |
2633 | old_scope = binding->scope; | |
2634 | } | |
2635 | while (old && VAR_P (old) && DECL_DEAD_FOR_LOCAL (old)) | |
2636 | old = DECL_SHADOWED_FOR_VAR (old); | |
2637 | ||
2638 | tree shadowed = NULL_TREE; | |
2639 | if (old | |
2640 | && (TREE_CODE (old) == PARM_DECL | |
2641 | || VAR_P (old) | |
2642 | || (TREE_CODE (old) == TYPE_DECL | |
2643 | && (!DECL_ARTIFICIAL (old) | |
2644 | || TREE_CODE (decl) == TYPE_DECL))) | |
006fbbe9 | 2645 | && DECL_FUNCTION_SCOPE_P (old) |
c0c24822 NS |
2646 | && (!DECL_ARTIFICIAL (decl) |
2647 | || DECL_IMPLICIT_TYPEDEF_P (decl) | |
2648 | || (VAR_P (decl) && DECL_ANON_UNION_VAR_P (decl)))) | |
2649 | { | |
2650 | /* DECL shadows a local thing possibly of interest. */ | |
2651 | ||
2652 | /* Don't complain if it's from an enclosing function. */ | |
2653 | if (DECL_CONTEXT (old) == current_function_decl | |
2654 | && TREE_CODE (decl) != PARM_DECL | |
2655 | && TREE_CODE (old) == PARM_DECL) | |
2656 | { | |
2657 | /* Go to where the parms should be and see if we find | |
2658 | them there. */ | |
2659 | cp_binding_level *b = current_binding_level->level_chain; | |
2660 | ||
2661 | if (FUNCTION_NEEDS_BODY_BLOCK (current_function_decl)) | |
2662 | /* Skip the ctor/dtor cleanup level. */ | |
2663 | b = b->level_chain; | |
2664 | ||
2665 | /* ARM $8.3 */ | |
2666 | if (b->kind == sk_function_parms) | |
2667 | { | |
2668 | error ("declaration of %q#D shadows a parameter", decl); | |
2669 | return; | |
2670 | } | |
2671 | } | |
2672 | ||
2673 | /* The local structure or class can't use parameters of | |
2674 | the containing function anyway. */ | |
2675 | if (DECL_CONTEXT (old) != current_function_decl) | |
2676 | { | |
2677 | for (cp_binding_level *scope = current_binding_level; | |
2678 | scope != old_scope; scope = scope->level_chain) | |
2679 | if (scope->kind == sk_class | |
2680 | && !LAMBDA_TYPE_P (scope->this_entity)) | |
2681 | return; | |
2682 | } | |
2683 | /* Error if redeclaring a local declared in a | |
2684 | init-statement or in the condition of an if or | |
2685 | switch statement when the new declaration is in the | |
2686 | outermost block of the controlled statement. | |
2687 | Redeclaring a variable from a for or while condition is | |
2688 | detected elsewhere. */ | |
2689 | else if (VAR_P (old) | |
2690 | && old_scope == current_binding_level->level_chain | |
2691 | && (old_scope->kind == sk_cond || old_scope->kind == sk_for)) | |
2692 | { | |
2693 | error ("redeclaration of %q#D", decl); | |
2694 | inform (DECL_SOURCE_LOCATION (old), | |
2695 | "%q#D previously declared here", old); | |
2696 | return; | |
2697 | } | |
2698 | /* C++11: | |
2699 | 3.3.3/3: The name declared in an exception-declaration (...) | |
2700 | shall not be redeclared in the outermost block of the handler. | |
2701 | 3.3.3/2: A parameter name shall not be redeclared (...) in | |
2702 | the outermost block of any handler associated with a | |
2703 | function-try-block. | |
2704 | 3.4.1/15: The function parameter names shall not be redeclared | |
2705 | in the exception-declaration nor in the outermost block of a | |
2706 | handler for the function-try-block. */ | |
2707 | else if ((TREE_CODE (old) == VAR_DECL | |
2708 | && old_scope == current_binding_level->level_chain | |
2709 | && old_scope->kind == sk_catch) | |
2710 | || (TREE_CODE (old) == PARM_DECL | |
2711 | && (current_binding_level->kind == sk_catch | |
2712 | || current_binding_level->level_chain->kind == sk_catch) | |
2713 | && in_function_try_handler)) | |
2714 | { | |
2715 | if (permerror (input_location, "redeclaration of %q#D", decl)) | |
2716 | inform (DECL_SOURCE_LOCATION (old), | |
2717 | "%q#D previously declared here", old); | |
2718 | return; | |
2719 | } | |
2720 | ||
2721 | /* If '-Wshadow=compatible-local' is specified without other | |
2722 | -Wshadow= flags, we will warn only when the type of the | |
2723 | shadowing variable (DECL) can be converted to that of the | |
2724 | shadowed parameter (OLD_LOCAL). The reason why we only check | |
2725 | if DECL's type can be converted to OLD_LOCAL's type (but not the | |
2726 | other way around) is because when users accidentally shadow a | |
2727 | parameter, more than often they would use the variable | |
2728 | thinking (mistakenly) it's still the parameter. It would be | |
2729 | rare that users would use the variable in the place that | |
2730 | expects the parameter but thinking it's a new decl. */ | |
2731 | ||
2732 | enum opt_code warning_code; | |
2733 | if (warn_shadow) | |
2734 | warning_code = OPT_Wshadow; | |
2735 | else if (warn_shadow_local) | |
2736 | warning_code = OPT_Wshadow_local; | |
2737 | else if (warn_shadow_compatible_local | |
9db84ece NS |
2738 | && (same_type_p (TREE_TYPE (old), TREE_TYPE (decl)) |
2739 | || (!dependent_type_p (TREE_TYPE (decl)) | |
2740 | && !dependent_type_p (TREE_TYPE (old)) | |
2741 | && can_convert (TREE_TYPE (old), TREE_TYPE (decl), | |
2742 | tf_none)))) | |
c0c24822 NS |
2743 | warning_code = OPT_Wshadow_compatible_local; |
2744 | else | |
2745 | return; | |
2746 | ||
2747 | const char *msg; | |
2748 | if (TREE_CODE (old) == PARM_DECL) | |
2749 | msg = "declaration of %q#D shadows a parameter"; | |
2750 | else if (is_capture_proxy (old)) | |
2751 | msg = "declaration of %qD shadows a lambda capture"; | |
2752 | else | |
2753 | msg = "declaration of %qD shadows a previous local"; | |
2754 | ||
2755 | if (warning_at (input_location, warning_code, msg, decl)) | |
2756 | { | |
2757 | shadowed = old; | |
2758 | goto inform_shadowed; | |
2759 | } | |
2760 | return; | |
2761 | } | |
2762 | ||
2763 | if (!warn_shadow) | |
2764 | return; | |
2765 | ||
2766 | /* Don't warn for artificial things that are not implicit typedefs. */ | |
2767 | if (DECL_ARTIFICIAL (decl) && !DECL_IMPLICIT_TYPEDEF_P (decl)) | |
2768 | return; | |
2769 | ||
2770 | if (nonlambda_method_basetype ()) | |
2771 | if (tree member = lookup_member (current_nonlambda_class_type (), | |
2772 | DECL_NAME (decl), /*protect=*/0, | |
2773 | /*want_type=*/false, tf_warning_or_error)) | |
2774 | { | |
2775 | member = MAYBE_BASELINK_FUNCTIONS (member); | |
2776 | ||
2777 | /* Warn if a variable shadows a non-function, or the variable | |
2778 | is a function or a pointer-to-function. */ | |
5256a7f5 | 2779 | if (!OVL_P (member) |
c0c24822 NS |
2780 | || TREE_CODE (decl) == FUNCTION_DECL |
2781 | || TYPE_PTRFN_P (TREE_TYPE (decl)) | |
2782 | || TYPE_PTRMEMFUNC_P (TREE_TYPE (decl))) | |
2783 | { | |
2784 | if (warning_at (input_location, OPT_Wshadow, | |
2785 | "declaration of %qD shadows a member of %qT", | |
2786 | decl, current_nonlambda_class_type ()) | |
2787 | && DECL_P (member)) | |
2788 | { | |
2789 | shadowed = member; | |
2790 | goto inform_shadowed; | |
2791 | } | |
2792 | } | |
2793 | return; | |
2794 | } | |
2795 | ||
2796 | /* Now look for a namespace shadow. */ | |
3c9cca88 | 2797 | old = find_namespace_value (current_namespace, DECL_NAME (decl)); |
c0c24822 NS |
2798 | if (old |
2799 | && (VAR_P (old) | |
2800 | || (TREE_CODE (old) == TYPE_DECL | |
2801 | && (!DECL_ARTIFICIAL (old) | |
2802 | || TREE_CODE (decl) == TYPE_DECL))) | |
2803 | && !instantiating_current_function_p ()) | |
2804 | /* XXX shadow warnings in outer-more namespaces */ | |
2805 | { | |
2806 | if (warning_at (input_location, OPT_Wshadow, | |
2807 | "declaration of %qD shadows a global declaration", | |
2808 | decl)) | |
2809 | { | |
2810 | shadowed = old; | |
2811 | goto inform_shadowed; | |
2812 | } | |
2813 | return; | |
2814 | } | |
2815 | ||
2816 | return; | |
2817 | ||
2818 | inform_shadowed: | |
2819 | inform (DECL_SOURCE_LOCATION (shadowed), "shadowed declaration is here"); | |
2820 | } | |
2821 | ||
e4ea7a4c NS |
2822 | /* DECL is being pushed inside function CTX. Set its context, if |
2823 | needed. */ | |
2824 | ||
2825 | static void | |
2826 | set_decl_context_in_fn (tree ctx, tree decl) | |
2827 | { | |
2828 | if (!DECL_CONTEXT (decl) | |
2829 | /* A local declaration for a function doesn't constitute | |
2830 | nesting. */ | |
2831 | && TREE_CODE (decl) != FUNCTION_DECL | |
2832 | /* A local declaration for an `extern' variable is in the | |
2833 | scope of the current namespace, not the current | |
2834 | function. */ | |
2835 | && !(VAR_P (decl) && DECL_EXTERNAL (decl)) | |
2836 | /* When parsing the parameter list of a function declarator, | |
2837 | don't set DECL_CONTEXT to an enclosing function. When we | |
2838 | push the PARM_DECLs in order to process the function body, | |
2839 | current_binding_level->this_entity will be set. */ | |
2840 | && !(TREE_CODE (decl) == PARM_DECL | |
2841 | && current_binding_level->kind == sk_function_parms | |
2842 | && current_binding_level->this_entity == NULL)) | |
2843 | DECL_CONTEXT (decl) = ctx; | |
2844 | ||
2845 | /* If this is the declaration for a namespace-scope function, | |
2846 | but the declaration itself is in a local scope, mark the | |
2847 | declaration. */ | |
2848 | if (TREE_CODE (decl) == FUNCTION_DECL && DECL_NAMESPACE_SCOPE_P (decl)) | |
2849 | DECL_LOCAL_FUNCTION_P (decl) = 1; | |
2850 | } | |
2851 | ||
2852 | /* DECL is a local-scope decl with linkage. SHADOWED is true if the | |
2853 | name is already bound at the current level. | |
2854 | ||
2855 | [basic.link] If there is a visible declaration of an entity with | |
2856 | linkage having the same name and type, ignoring entities declared | |
2857 | outside the innermost enclosing namespace scope, the block scope | |
2858 | declaration declares that same entity and receives the linkage of | |
2859 | the previous declaration. | |
2860 | ||
2861 | Also, make sure that this decl matches any existing external decl | |
2862 | in the enclosing namespace. */ | |
2863 | ||
2864 | static void | |
2865 | set_local_extern_decl_linkage (tree decl, bool shadowed) | |
2866 | { | |
2867 | tree ns_value = decl; /* Unique marker. */ | |
2868 | ||
2869 | if (!shadowed) | |
2870 | { | |
2871 | tree loc_value = innermost_non_namespace_value (DECL_NAME (decl)); | |
2872 | if (!loc_value) | |
2873 | { | |
2874 | ns_value | |
3c9cca88 | 2875 | = find_namespace_value (current_namespace, DECL_NAME (decl)); |
e4ea7a4c NS |
2876 | loc_value = ns_value; |
2877 | } | |
8f3284a4 NS |
2878 | if (loc_value == error_mark_node |
2879 | /* An ambiguous lookup. */ | |
2880 | || (loc_value && TREE_CODE (loc_value) == TREE_LIST)) | |
e4ea7a4c NS |
2881 | loc_value = NULL_TREE; |
2882 | ||
2883 | for (ovl_iterator iter (loc_value); iter; ++iter) | |
ef4c5e78 | 2884 | if (!iter.hidden_p () |
e4ea7a4c NS |
2885 | && (TREE_STATIC (*iter) || DECL_EXTERNAL (*iter)) |
2886 | && decls_match (*iter, decl)) | |
2887 | { | |
2888 | /* The standard only says that the local extern inherits | |
2889 | linkage from the previous decl; in particular, default | |
2890 | args are not shared. Add the decl into a hash table to | |
2891 | make sure only the previous decl in this case is seen | |
2892 | by the middle end. */ | |
2893 | struct cxx_int_tree_map *h; | |
2894 | ||
2895 | /* We inherit the outer decl's linkage. But we're a | |
2896 | different decl. */ | |
2897 | TREE_PUBLIC (decl) = TREE_PUBLIC (*iter); | |
2898 | ||
2899 | if (cp_function_chain->extern_decl_map == NULL) | |
2900 | cp_function_chain->extern_decl_map | |
2901 | = hash_table<cxx_int_tree_map_hasher>::create_ggc (20); | |
2902 | ||
2903 | h = ggc_alloc<cxx_int_tree_map> (); | |
2904 | h->uid = DECL_UID (decl); | |
2905 | h->to = *iter; | |
2906 | cxx_int_tree_map **loc = cp_function_chain->extern_decl_map | |
2907 | ->find_slot (h, INSERT); | |
2908 | *loc = h; | |
2909 | break; | |
2910 | } | |
2911 | } | |
2912 | ||
2913 | if (TREE_PUBLIC (decl)) | |
2914 | { | |
2915 | /* DECL is externally visible. Make sure it matches a matching | |
3c9cca88 | 2916 | decl in the namespace scope. We only really need to check |
e4ea7a4c NS |
2917 | this when inserting the decl, not when we find an existing |
2918 | match in the current scope. However, in practice we're | |
2919 | going to be inserting a new decl in the majority of cases -- | |
2920 | who writes multiple extern decls for the same thing in the | |
2921 | same local scope? Doing it here often avoids a duplicate | |
2922 | namespace lookup. */ | |
2923 | ||
2924 | /* Avoid repeating a lookup. */ | |
2925 | if (ns_value == decl) | |
3c9cca88 | 2926 | ns_value = find_namespace_value (current_namespace, DECL_NAME (decl)); |
e4ea7a4c | 2927 | |
8f3284a4 NS |
2928 | if (ns_value == error_mark_node |
2929 | || (ns_value && TREE_CODE (ns_value) == TREE_LIST)) | |
e4ea7a4c NS |
2930 | ns_value = NULL_TREE; |
2931 | ||
2932 | for (ovl_iterator iter (ns_value); iter; ++iter) | |
2933 | { | |
2934 | tree other = *iter; | |
2935 | ||
2936 | if (!(TREE_PUBLIC (other) || DECL_EXTERNAL (other))) | |
2937 | ; /* Not externally visible. */ | |
2938 | else if (DECL_EXTERN_C_P (decl) && DECL_EXTERN_C_P (other)) | |
2939 | ; /* Both are extern "C", we'll check via that mechanism. */ | |
2940 | else if (TREE_CODE (other) != TREE_CODE (decl) | |
2941 | || ((VAR_P (decl) || matching_fn_p (other, decl)) | |
2942 | && !comptypes (TREE_TYPE (decl), TREE_TYPE (other), | |
2943 | COMPARE_REDECLARATION))) | |
2944 | { | |
2945 | if (permerror (DECL_SOURCE_LOCATION (decl), | |
2946 | "local external declaration %q#D", decl)) | |
2947 | inform (DECL_SOURCE_LOCATION (other), | |
2948 | "does not match previous declaration %q#D", other); | |
2949 | break; | |
2950 | } | |
2951 | } | |
2952 | } | |
2953 | } | |
2954 | ||
3a9cc685 NS |
2955 | /* Record DECL as belonging to the current lexical scope. Check for |
2956 | errors (such as an incompatible declaration for the same name | |
2957 | already seen in the same scope). IS_FRIEND is true if DECL is | |
b655c310 | 2958 | declared as a friend. |
00e8de68 | 2959 | |
3a9cc685 NS |
2960 | Returns either DECL or an old decl for the same name. If an old |
2961 | decl is returned, it may have been smashed to agree with what DECL | |
2962 | says. */ | |
89b578be | 2963 | |
b655c310 | 2964 | static tree |
3a9cc685 | 2965 | do_pushdecl (tree decl, bool is_friend) |
89b578be | 2966 | { |
3a9cc685 | 2967 | if (decl == error_mark_node) |
b655c310 | 2968 | return error_mark_node; |
00e8de68 | 2969 | |
3a9cc685 NS |
2970 | if (!DECL_TEMPLATE_PARM_P (decl) && current_function_decl) |
2971 | set_decl_context_in_fn (current_function_decl, decl); | |
c8094d83 | 2972 | |
3a9cc685 NS |
2973 | /* The binding level we will be pushing into. During local class |
2974 | pushing, we want to push to the containing scope. */ | |
2975 | cp_binding_level *level = current_binding_level; | |
2976 | while (level->kind == sk_class) | |
2977 | level = level->level_chain; | |
00e8de68 | 2978 | |
e833f686 NS |
2979 | /* An anonymous namespace has a NULL DECL_NAME, but we still want to |
2980 | insert it. Other NULL-named decls, not so much. */ | |
2981 | tree name = DECL_NAME (decl); | |
2982 | if (name || TREE_CODE (decl) == NAMESPACE_DECL) | |
00e8de68 | 2983 | { |
3c9cca88 | 2984 | cxx_binding *binding = NULL; /* Local scope binding. */ |
3a9cc685 | 2985 | tree ns = NULL_TREE; /* Searched namespace. */ |
3c9cca88 | 2986 | tree *slot = NULL; /* Binding slot in namespace. */ |
3a9cc685 | 2987 | tree old = NULL_TREE; |
00e8de68 | 2988 | |
3a9cc685 | 2989 | if (level->kind == sk_namespace) |
b655c310 | 2990 | { |
3a9cc685 NS |
2991 | /* We look in the decl's namespace for an existing |
2992 | declaration, even though we push into the current | |
2993 | namespace. */ | |
2994 | ns = (DECL_NAMESPACE_SCOPE_P (decl) | |
2995 | ? CP_DECL_CONTEXT (decl) : current_namespace); | |
2996 | /* Create the binding, if this is current namespace, because | |
2997 | that's where we'll be pushing anyway. */ | |
3c9cca88 NS |
2998 | slot = find_namespace_slot (ns, name, ns == current_namespace); |
2999 | if (slot) | |
3000 | old = MAYBE_STAT_DECL (*slot); | |
b655c310 | 3001 | } |
3a9cc685 | 3002 | else |
3c9cca88 NS |
3003 | { |
3004 | binding = find_local_binding (level, name); | |
3005 | if (binding) | |
3006 | old = binding->value; | |
3007 | } | |
00e8de68 | 3008 | |
3a9cc685 NS |
3009 | if (current_function_decl && VAR_OR_FUNCTION_DECL_P (decl) |
3010 | && DECL_EXTERNAL (decl)) | |
3011 | set_local_extern_decl_linkage (decl, old != NULL_TREE); | |
00e8de68 | 3012 | |
3a9cc685 NS |
3013 | if (old == error_mark_node) |
3014 | old = NULL_TREE; | |
00e8de68 | 3015 | |
3a9cc685 NS |
3016 | for (ovl_iterator iter (old); iter; ++iter) |
3017 | if (iter.using_p ()) | |
3018 | ; /* Ignore using decls here. */ | |
3019 | else if (tree match = duplicate_decls (decl, *iter, is_friend)) | |
ef4c5e78 | 3020 | { |
274c1516 NS |
3021 | if (match == error_mark_node) |
3022 | ; | |
3023 | else if (TREE_CODE (match) == TYPE_DECL) | |
3024 | /* The IDENTIFIER will have the type referring to the | |
3025 | now-smashed TYPE_DECL, because ...? Reset it. */ | |
3026 | SET_IDENTIFIER_TYPE_VALUE (name, TREE_TYPE (match)); | |
3027 | else if (iter.hidden_p () && !DECL_HIDDEN_P (match)) | |
ef4c5e78 NS |
3028 | { |
3029 | /* Unhiding a previously hidden decl. */ | |
3030 | tree head = iter.reveal_node (old); | |
3031 | if (head != old) | |
3032 | { | |
3033 | if (!ns) | |
3c9cca88 NS |
3034 | { |
3035 | update_local_overload (binding, head); | |
3036 | binding->value = head; | |
3037 | } | |
3038 | else if (STAT_HACK_P (*slot)) | |
3039 | STAT_DECL (*slot) = head; | |
3040 | else | |
3041 | *slot = head; | |
ef4c5e78 | 3042 | } |
7cd6ea64 NS |
3043 | if (DECL_EXTERN_C_P (match)) |
3044 | /* We need to check and register the decl now. */ | |
ef4c5e78 NS |
3045 | check_extern_c_conflict (match); |
3046 | } | |
3047 | return match; | |
3048 | } | |
c8094d83 | 3049 | |
3a9cc685 | 3050 | /* We are pushing a new decl. */ |
00e8de68 | 3051 | |
ef4c5e78 NS |
3052 | /* Skip a hidden builtin we failed to match already. There can |
3053 | only be one. */ | |
3054 | if (old && anticipated_builtin_p (old)) | |
3055 | old = OVL_CHAIN (old); | |
5294e4c3 | 3056 | |
3a9cc685 | 3057 | check_template_shadow (decl); |
00e8de68 | 3058 | |
3a9cc685 | 3059 | if (DECL_DECLARES_FUNCTION_P (decl)) |
b655c310 | 3060 | { |
3a9cc685 | 3061 | check_default_args (decl); |
00e8de68 | 3062 | |
3a9cc685 | 3063 | if (is_friend) |
b655c310 | 3064 | { |
3a9cc685 | 3065 | if (level->kind != sk_namespace) |
b1a7e33d NS |
3066 | { |
3067 | /* In a local class, a friend function declaration must | |
3068 | find a matching decl in the innermost non-class scope. | |
3069 | [class.friend/11] */ | |
3070 | error ("friend declaration %qD in local class without " | |
3071 | "prior local declaration", decl); | |
3072 | /* Don't attempt to push it. */ | |
3073 | return error_mark_node; | |
3074 | } | |
6c072e21 NS |
3075 | /* Hide it from ordinary lookup. */ |
3076 | DECL_ANTICIPATED (decl) = DECL_HIDDEN_FRIEND_P (decl) = true; | |
b655c310 NS |
3077 | } |
3078 | } | |
00e8de68 | 3079 | |
3a9cc685 | 3080 | if (level->kind != sk_namespace) |
b655c310 | 3081 | { |
3a9cc685 | 3082 | check_local_shadow (decl); |
00e8de68 | 3083 | |
3a9cc685 NS |
3084 | if (TREE_CODE (decl) == NAMESPACE_DECL) |
3085 | /* A local namespace alias. */ | |
3086 | set_identifier_type_value (name, NULL_TREE); | |
00e8de68 | 3087 | |
3a9cc685 NS |
3088 | if (!binding) |
3089 | binding = create_local_binding (level, name); | |
b655c310 | 3090 | } |
3c9cca88 | 3091 | else if (!slot) |
b655c310 | 3092 | { |
3a9cc685 | 3093 | ns = current_namespace; |
3c9cca88 | 3094 | slot = find_namespace_slot (ns, name, true); |
be3b7dcf NS |
3095 | /* Update OLD to reflect the namespace we're going to be |
3096 | pushing into. */ | |
3097 | old = MAYBE_STAT_DECL (*slot); | |
b655c310 | 3098 | } |
fdf03377 | 3099 | |
3c9cca88 | 3100 | old = update_binding (level, binding, slot, old, decl, is_friend); |
fdf03377 | 3101 | |
3a9cc685 NS |
3102 | if (old != decl) |
3103 | /* An existing decl matched, use it. */ | |
3104 | decl = old; | |
3105 | else if (TREE_CODE (decl) == TYPE_DECL) | |
3106 | { | |
3107 | tree type = TREE_TYPE (decl); | |
00e8de68 | 3108 | |
3a9cc685 | 3109 | if (type != error_mark_node) |
b655c310 | 3110 | { |
3a9cc685 NS |
3111 | if (TYPE_NAME (type) != decl) |
3112 | set_underlying_type (decl); | |
00e8de68 | 3113 | |
3a9cc685 NS |
3114 | if (!ns) |
3115 | set_identifier_type_value_with_scope (name, decl, level); | |
b655c310 | 3116 | else |
3a9cc685 | 3117 | SET_IDENTIFIER_TYPE_VALUE (name, global_type_node); |
b655c310 | 3118 | } |
7b3b6ae4 | 3119 | |
3a9cc685 NS |
3120 | /* If this is a locally defined typedef in a function that |
3121 | is not a template instantation, record it to implement | |
3122 | -Wunused-local-typedefs. */ | |
3123 | if (!instantiating_current_function_p ()) | |
3124 | record_locally_defined_typedef (decl); | |
3125 | } | |
3126 | else if (VAR_P (decl)) | |
3127 | maybe_register_incomplete_var (decl); | |
7cd6ea64 NS |
3128 | |
3129 | if ((VAR_P (decl) || TREE_CODE (decl) == FUNCTION_DECL) | |
3130 | && DECL_EXTERN_C_P (decl)) | |
3a9cc685 | 3131 | check_extern_c_conflict (decl); |
00e8de68 | 3132 | } |
3a9cc685 NS |
3133 | else |
3134 | add_decl_to_level (level, decl); | |
00e8de68 | 3135 | |
3a9cc685 | 3136 | return decl; |
00e8de68 GDR |
3137 | } |
3138 | ||
4f15a5da | 3139 | /* Record a decl-node X as belonging to the current lexical scope. |
32196b87 NS |
3140 | It's a friend if IS_FRIEND is true -- which affects exactly where |
3141 | we push it. */ | |
575bfb00 LC |
3142 | |
3143 | tree | |
4f15a5da | 3144 | pushdecl (tree x, bool is_friend) |
575bfb00 | 3145 | { |
b655c310 | 3146 | bool subtime = timevar_cond_start (TV_NAME_LOOKUP); |
32196b87 | 3147 | tree ret = do_pushdecl (x, is_friend); |
b655c310 | 3148 | timevar_cond_stop (TV_NAME_LOOKUP, subtime); |
575bfb00 LC |
3149 | return ret; |
3150 | } | |
3151 | ||
b655c310 NS |
3152 | /* Enter DECL into the symbol table, if that's appropriate. Returns |
3153 | DECL, or a modified version thereof. */ | |
00e8de68 | 3154 | |
b655c310 NS |
3155 | tree |
3156 | maybe_push_decl (tree decl) | |
00e8de68 | 3157 | { |
b655c310 | 3158 | tree type = TREE_TYPE (decl); |
00e8de68 | 3159 | |
b655c310 NS |
3160 | /* Add this decl to the current binding level, but not if it comes |
3161 | from another scope, e.g. a static member variable. TEM may equal | |
3162 | DECL or it may be a previous decl of the same name. */ | |
3163 | if (decl == error_mark_node | |
3164 | || (TREE_CODE (decl) != PARM_DECL | |
3165 | && DECL_CONTEXT (decl) != NULL_TREE | |
3166 | /* Definitions of namespace members outside their namespace are | |
3167 | possible. */ | |
3168 | && !DECL_NAMESPACE_SCOPE_P (decl)) | |
3169 | || (TREE_CODE (decl) == TEMPLATE_DECL && !namespace_bindings_p ()) | |
3170 | || type == unknown_type_node | |
3171 | /* The declaration of a template specialization does not affect | |
3172 | the functions available for overload resolution, so we do not | |
3173 | call pushdecl. */ | |
3174 | || (TREE_CODE (decl) == FUNCTION_DECL | |
3175 | && DECL_TEMPLATE_SPECIALIZATION (decl))) | |
3176 | return decl; | |
00e8de68 | 3177 | else |
b655c310 | 3178 | return pushdecl (decl); |
00e8de68 GDR |
3179 | } |
3180 | ||
b655c310 | 3181 | /* Bind DECL to ID in the current_binding_level, assumed to be a local |
9d029ddf NS |
3182 | binding level. If IS_USING is true, DECL got here through a |
3183 | using-declaration. */ | |
00e8de68 | 3184 | |
9d029ddf NS |
3185 | static void |
3186 | push_local_binding (tree id, tree decl, bool is_using) | |
00e8de68 | 3187 | { |
b655c310 NS |
3188 | /* Skip over any local classes. This makes sense if we call |
3189 | push_local_binding with a friend decl of a local class. */ | |
3c9cca88 | 3190 | cp_binding_level *b = innermost_nonclass_level (); |
5ad4f1c8 | 3191 | |
3c9cca88 NS |
3192 | gcc_assert (b->kind != sk_namespace); |
3193 | if (find_local_binding (b, id)) | |
b655c310 NS |
3194 | { |
3195 | /* Supplement the existing binding. */ | |
3196 | if (!supplement_binding (IDENTIFIER_BINDING (id), decl)) | |
3197 | /* It didn't work. Something else must be bound at this | |
3198 | level. Do not add DECL to the list of things to pop | |
3199 | later. */ | |
3200 | return; | |
3201 | } | |
3202 | else | |
3203 | /* Create a new binding. */ | |
3204 | push_binding (id, decl, b); | |
5a167978 | 3205 | |
9d029ddf NS |
3206 | if (TREE_CODE (decl) == OVERLOAD || is_using) |
3207 | /* We must put the OVERLOAD or using into a TREE_LIST since we | |
3208 | cannot use the decl's chain itself. */ | |
b655c310 | 3209 | decl = build_tree_list (NULL_TREE, decl); |
5a167978 | 3210 | |
b655c310 NS |
3211 | /* And put DECL on the list of things declared by the current |
3212 | binding level. */ | |
9d029ddf | 3213 | add_decl_to_level (b, decl); |
5a167978 GDR |
3214 | } |
3215 | ||
b655c310 NS |
3216 | /* Check to see whether or not DECL is a variable that would have been |
3217 | in scope under the ARM, but is not in scope under the ANSI/ISO | |
3218 | standard. If so, issue an error message. If name lookup would | |
3219 | work in both cases, but return a different result, this function | |
3220 | returns the result of ANSI/ISO lookup. Otherwise, it returns | |
d55d1e4f NS |
3221 | DECL. |
3222 | ||
3223 | FIXME: Scheduled for removal after GCC-8 is done. */ | |
5a167978 | 3224 | |
b655c310 NS |
3225 | tree |
3226 | check_for_out_of_scope_variable (tree decl) | |
5a167978 | 3227 | { |
b655c310 | 3228 | tree shadowed; |
c8094d83 | 3229 | |
b655c310 NS |
3230 | /* We only care about out of scope variables. */ |
3231 | if (!(VAR_P (decl) && DECL_DEAD_FOR_LOCAL (decl))) | |
3232 | return decl; | |
420bf978 | 3233 | |
b655c310 NS |
3234 | shadowed = DECL_HAS_SHADOWED_FOR_VAR_P (decl) |
3235 | ? DECL_SHADOWED_FOR_VAR (decl) : NULL_TREE ; | |
3236 | while (shadowed != NULL_TREE && VAR_P (shadowed) | |
3237 | && DECL_DEAD_FOR_LOCAL (shadowed)) | |
3238 | shadowed = DECL_HAS_SHADOWED_FOR_VAR_P (shadowed) | |
3239 | ? DECL_SHADOWED_FOR_VAR (shadowed) : NULL_TREE; | |
3240 | if (!shadowed) | |
3c9cca88 | 3241 | shadowed = find_namespace_value (current_namespace, DECL_NAME (decl)); |
b655c310 NS |
3242 | if (shadowed) |
3243 | { | |
d55d1e4f NS |
3244 | if (!DECL_ERROR_REPORTED (decl) |
3245 | && flag_permissive | |
3246 | && warning (0, "name lookup of %qD changed", DECL_NAME (decl))) | |
b655c310 | 3247 | { |
d55d1e4f NS |
3248 | inform (DECL_SOURCE_LOCATION (shadowed), |
3249 | "matches this %qD under ISO standard rules", shadowed); | |
3250 | inform (DECL_SOURCE_LOCATION (decl), | |
3251 | " matches this %qD under old rules", decl); | |
b655c310 | 3252 | } |
d55d1e4f | 3253 | DECL_ERROR_REPORTED (decl) = 1; |
b655c310 NS |
3254 | return shadowed; |
3255 | } | |
5a167978 | 3256 | |
b655c310 NS |
3257 | /* If we have already complained about this declaration, there's no |
3258 | need to do it again. */ | |
3259 | if (DECL_ERROR_REPORTED (decl)) | |
3260 | return decl; | |
a5e6b29b | 3261 | |
b655c310 | 3262 | DECL_ERROR_REPORTED (decl) = 1; |
a5e6b29b | 3263 | |
b655c310 NS |
3264 | if (TREE_TYPE (decl) == error_mark_node) |
3265 | return decl; | |
a5e6b29b | 3266 | |
b655c310 NS |
3267 | if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (TREE_TYPE (decl))) |
3268 | { | |
3269 | error ("name lookup of %qD changed for ISO %<for%> scoping", | |
3270 | DECL_NAME (decl)); | |
d55d1e4f NS |
3271 | inform (DECL_SOURCE_LOCATION (decl), |
3272 | "cannot use obsolete binding %qD because it has a destructor", | |
3273 | decl); | |
b655c310 NS |
3274 | return error_mark_node; |
3275 | } | |
3276 | else | |
3277 | { | |
d55d1e4f NS |
3278 | permerror (input_location, |
3279 | "name lookup of %qD changed for ISO %<for%> scoping", | |
b655c310 NS |
3280 | DECL_NAME (decl)); |
3281 | if (flag_permissive) | |
d55d1e4f NS |
3282 | inform (DECL_SOURCE_LOCATION (decl), |
3283 | "using obsolete binding %qD", decl); | |
3284 | static bool hint; | |
3285 | if (!hint) | |
3286 | inform (input_location, flag_permissive | |
3287 | ? "this flexibility is deprecated and will be removed" | |
3288 | : "if you use %<-fpermissive%> G++ will accept your code"); | |
3289 | hint = true; | |
b655c310 | 3290 | } |
a5e6b29b | 3291 | |
b655c310 | 3292 | return decl; |
a5e6b29b | 3293 | } |
b655c310 NS |
3294 | \f |
3295 | /* true means unconditionally make a BLOCK for the next level pushed. */ | |
a5e6b29b | 3296 | |
b655c310 | 3297 | static bool keep_next_level_flag; |
d5f4eddd | 3298 | |
b655c310 | 3299 | static int binding_depth = 0; |
d5f4eddd | 3300 | |
b655c310 NS |
3301 | static void |
3302 | indent (int depth) | |
d5f4eddd | 3303 | { |
b655c310 | 3304 | int i; |
d5f4eddd | 3305 | |
b655c310 NS |
3306 | for (i = 0; i < depth * 2; i++) |
3307 | putc (' ', stderr); | |
d5f4eddd JM |
3308 | } |
3309 | ||
b655c310 NS |
3310 | /* Return a string describing the kind of SCOPE we have. */ |
3311 | static const char * | |
3312 | cp_binding_level_descriptor (cp_binding_level *scope) | |
ed3cf953 | 3313 | { |
b655c310 NS |
3314 | /* The order of this table must match the "scope_kind" |
3315 | enumerators. */ | |
3316 | static const char* scope_kind_names[] = { | |
3317 | "block-scope", | |
3318 | "cleanup-scope", | |
3319 | "try-scope", | |
3320 | "catch-scope", | |
3321 | "for-scope", | |
3322 | "function-parameter-scope", | |
3323 | "class-scope", | |
3324 | "namespace-scope", | |
3325 | "template-parameter-scope", | |
3326 | "template-explicit-spec-scope" | |
3327 | }; | |
3328 | const scope_kind kind = scope->explicit_spec_p | |
3329 | ? sk_template_spec : scope->kind; | |
ed3cf953 | 3330 | |
b655c310 | 3331 | return scope_kind_names[kind]; |
ed3cf953 GDR |
3332 | } |
3333 | ||
b655c310 NS |
3334 | /* Output a debugging information about SCOPE when performing |
3335 | ACTION at LINE. */ | |
3336 | static void | |
3337 | cp_binding_level_debug (cp_binding_level *scope, int line, const char *action) | |
ed3cf953 | 3338 | { |
b655c310 NS |
3339 | const char *desc = cp_binding_level_descriptor (scope); |
3340 | if (scope->this_entity) | |
0f2c4a8f | 3341 | verbatim ("%s %<%s(%E)%> %p %d\n", action, desc, |
b655c310 NS |
3342 | scope->this_entity, (void *) scope, line); |
3343 | else | |
3344 | verbatim ("%s %s %p %d\n", action, desc, (void *) scope, line); | |
ed3cf953 GDR |
3345 | } |
3346 | ||
b655c310 NS |
3347 | /* Return the estimated initial size of the hashtable of a NAMESPACE |
3348 | scope. */ | |
ed3cf953 | 3349 | |
b655c310 NS |
3350 | static inline size_t |
3351 | namespace_scope_ht_size (tree ns) | |
ed3cf953 | 3352 | { |
b655c310 | 3353 | tree name = DECL_NAME (ns); |
ed3cf953 | 3354 | |
b655c310 NS |
3355 | return name == std_identifier |
3356 | ? NAMESPACE_STD_HT_SIZE | |
ad9870f2 | 3357 | : (name == global_identifier |
b655c310 NS |
3358 | ? GLOBAL_SCOPE_HT_SIZE |
3359 | : NAMESPACE_ORDINARY_HT_SIZE); | |
ed3cf953 | 3360 | } |
ed3cf953 | 3361 | |
b655c310 | 3362 | /* A chain of binding_level structures awaiting reuse. */ |
ecba6c56 | 3363 | |
b655c310 | 3364 | static GTY((deletable)) cp_binding_level *free_binding_level; |
ecba6c56 | 3365 | |
b655c310 | 3366 | /* Insert SCOPE as the innermost binding level. */ |
ecba6c56 | 3367 | |
b655c310 NS |
3368 | void |
3369 | push_binding_level (cp_binding_level *scope) | |
3370 | { | |
3371 | /* Add it to the front of currently active scopes stack. */ | |
3372 | scope->level_chain = current_binding_level; | |
3373 | current_binding_level = scope; | |
3374 | keep_next_level_flag = false; | |
3375 | ||
3376 | if (ENABLE_SCOPE_CHECKING) | |
ecba6c56 | 3377 | { |
b655c310 NS |
3378 | scope->binding_depth = binding_depth; |
3379 | indent (binding_depth); | |
3380 | cp_binding_level_debug (scope, LOCATION_LINE (input_location), | |
3381 | "push"); | |
3382 | binding_depth++; | |
ecba6c56 | 3383 | } |
ecba6c56 DS |
3384 | } |
3385 | ||
b655c310 NS |
3386 | /* Create a new KIND scope and make it the top of the active scopes stack. |
3387 | ENTITY is the scope of the associated C++ entity (namespace, class, | |
3388 | function, C++0x enumeration); it is NULL otherwise. */ | |
3a636414 | 3389 | |
b655c310 NS |
3390 | cp_binding_level * |
3391 | begin_scope (scope_kind kind, tree entity) | |
3a636414 | 3392 | { |
b655c310 | 3393 | cp_binding_level *scope; |
3a636414 | 3394 | |
b655c310 NS |
3395 | /* Reuse or create a struct for this binding level. */ |
3396 | if (!ENABLE_SCOPE_CHECKING && free_binding_level) | |
3a636414 | 3397 | { |
b655c310 NS |
3398 | scope = free_binding_level; |
3399 | free_binding_level = scope->level_chain; | |
3400 | memset (scope, 0, sizeof (cp_binding_level)); | |
3a636414 | 3401 | } |
b655c310 NS |
3402 | else |
3403 | scope = ggc_cleared_alloc<cp_binding_level> (); | |
3a636414 | 3404 | |
b655c310 NS |
3405 | scope->this_entity = entity; |
3406 | scope->more_cleanups_ok = true; | |
3407 | switch (kind) | |
3408 | { | |
3409 | case sk_cleanup: | |
3410 | scope->keep = true; | |
3411 | break; | |
a5e6b29b | 3412 | |
b655c310 NS |
3413 | case sk_template_spec: |
3414 | scope->explicit_spec_p = true; | |
3415 | kind = sk_template_parms; | |
3416 | /* Fall through. */ | |
3417 | case sk_template_parms: | |
3418 | case sk_block: | |
3419 | case sk_try: | |
3420 | case sk_catch: | |
3421 | case sk_for: | |
3422 | case sk_cond: | |
3423 | case sk_class: | |
3424 | case sk_scoped_enum: | |
3425 | case sk_function_parms: | |
3426 | case sk_transaction: | |
3427 | case sk_omp: | |
3428 | scope->keep = keep_next_level_flag; | |
3429 | break; | |
a5e6b29b | 3430 | |
b655c310 NS |
3431 | case sk_namespace: |
3432 | NAMESPACE_LEVEL (entity) = scope; | |
a5e6b29b | 3433 | break; |
b655c310 NS |
3434 | |
3435 | default: | |
3436 | /* Should not happen. */ | |
3437 | gcc_unreachable (); | |
3438 | break; | |
3439 | } | |
3440 | scope->kind = kind; | |
3441 | ||
3442 | push_binding_level (scope); | |
3443 | ||
3444 | return scope; | |
575bfb00 LC |
3445 | } |
3446 | ||
b655c310 NS |
3447 | /* We're about to leave current scope. Pop the top of the stack of |
3448 | currently active scopes. Return the enclosing scope, now active. */ | |
575bfb00 | 3449 | |
b655c310 NS |
3450 | cp_binding_level * |
3451 | leave_scope (void) | |
575bfb00 | 3452 | { |
b655c310 | 3453 | cp_binding_level *scope = current_binding_level; |
a5e6b29b | 3454 | |
b655c310 NS |
3455 | if (scope->kind == sk_namespace && class_binding_level) |
3456 | current_binding_level = class_binding_level; | |
2b8dfc07 | 3457 | |
b655c310 NS |
3458 | /* We cannot leave a scope, if there are none left. */ |
3459 | if (NAMESPACE_LEVEL (global_namespace)) | |
3460 | gcc_assert (!global_scope_p (scope)); | |
ed3cf953 | 3461 | |
b655c310 NS |
3462 | if (ENABLE_SCOPE_CHECKING) |
3463 | { | |
3464 | indent (--binding_depth); | |
3465 | cp_binding_level_debug (scope, LOCATION_LINE (input_location), | |
3466 | "leave"); | |
3467 | } | |
ed3cf953 | 3468 | |
b655c310 NS |
3469 | /* Move one nesting level up. */ |
3470 | current_binding_level = scope->level_chain; | |
3471 | ||
3472 | /* Namespace-scopes are left most probably temporarily, not | |
3473 | completely; they can be reopened later, e.g. in namespace-extension | |
3474 | or any name binding activity that requires us to resume a | |
3475 | namespace. For classes, we cache some binding levels. For other | |
3476 | scopes, we just make the structure available for reuse. */ | |
3477 | if (scope->kind != sk_namespace | |
3478 | && scope->kind != sk_class) | |
00e8de68 | 3479 | { |
b655c310 NS |
3480 | scope->level_chain = free_binding_level; |
3481 | gcc_assert (!ENABLE_SCOPE_CHECKING | |
3482 | || scope->binding_depth == binding_depth); | |
3483 | free_binding_level = scope; | |
00e8de68 | 3484 | } |
b655c310 NS |
3485 | |
3486 | if (scope->kind == sk_class) | |
00e8de68 | 3487 | { |
b655c310 NS |
3488 | /* Reset DEFINING_CLASS_P to allow for reuse of a |
3489 | class-defining scope in a non-defining context. */ | |
3490 | scope->defining_class_p = 0; | |
3491 | ||
3492 | /* Find the innermost enclosing class scope, and reset | |
3493 | CLASS_BINDING_LEVEL appropriately. */ | |
3494 | class_binding_level = NULL; | |
3495 | for (scope = current_binding_level; scope; scope = scope->level_chain) | |
3496 | if (scope->kind == sk_class) | |
3497 | { | |
3498 | class_binding_level = scope; | |
3499 | break; | |
3500 | } | |
00e8de68 | 3501 | } |
b655c310 NS |
3502 | |
3503 | return current_binding_level; | |
00e8de68 | 3504 | } |
575bfb00 | 3505 | |
b655c310 NS |
3506 | static void |
3507 | resume_scope (cp_binding_level* b) | |
575bfb00 | 3508 | { |
b655c310 NS |
3509 | /* Resuming binding levels is meant only for namespaces, |
3510 | and those cannot nest into classes. */ | |
3511 | gcc_assert (!class_binding_level); | |
3512 | /* Also, resuming a non-directly nested namespace is a no-no. */ | |
3513 | gcc_assert (b->level_chain == current_binding_level); | |
3514 | current_binding_level = b; | |
3515 | if (ENABLE_SCOPE_CHECKING) | |
3516 | { | |
3517 | b->binding_depth = binding_depth; | |
3518 | indent (binding_depth); | |
3519 | cp_binding_level_debug (b, LOCATION_LINE (input_location), "resume"); | |
3520 | binding_depth++; | |
3521 | } | |
575bfb00 LC |
3522 | } |
3523 | ||
b655c310 | 3524 | /* Return the innermost binding level that is not for a class scope. */ |
fde6f97e | 3525 | |
b655c310 NS |
3526 | static cp_binding_level * |
3527 | innermost_nonclass_level (void) | |
fde6f97e | 3528 | { |
b655c310 | 3529 | cp_binding_level *b; |
fde6f97e | 3530 | |
b655c310 NS |
3531 | b = current_binding_level; |
3532 | while (b->kind == sk_class) | |
3533 | b = b->level_chain; | |
fde6f97e | 3534 | |
b655c310 | 3535 | return b; |
fde6f97e | 3536 | } |
00e8de68 | 3537 | |
b655c310 NS |
3538 | /* We're defining an object of type TYPE. If it needs a cleanup, but |
3539 | we're not allowed to add any more objects with cleanups to the current | |
3540 | scope, create a new binding level. */ | |
a5e6b29b | 3541 | |
b655c310 NS |
3542 | void |
3543 | maybe_push_cleanup_level (tree type) | |
a5e6b29b | 3544 | { |
b655c310 NS |
3545 | if (type != error_mark_node |
3546 | && TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type) | |
3547 | && current_binding_level->more_cleanups_ok == 0) | |
a5e6b29b | 3548 | { |
b655c310 NS |
3549 | begin_scope (sk_cleanup, NULL); |
3550 | current_binding_level->statement_list = push_stmt_list (); | |
3551 | } | |
3552 | } | |
a5e6b29b | 3553 | |
b655c310 | 3554 | /* Return true if we are in the global binding level. */ |
a5e6b29b | 3555 | |
b655c310 NS |
3556 | bool |
3557 | global_bindings_p (void) | |
3558 | { | |
3559 | return global_scope_p (current_binding_level); | |
3560 | } | |
a5e6b29b | 3561 | |
b655c310 NS |
3562 | /* True if we are currently in a toplevel binding level. This |
3563 | means either the global binding level or a namespace in a toplevel | |
3564 | binding level. Since there are no non-toplevel namespace levels, | |
3565 | this really means any namespace or template parameter level. We | |
3566 | also include a class whose context is toplevel. */ | |
1a32490a | 3567 | |
b655c310 NS |
3568 | bool |
3569 | toplevel_bindings_p (void) | |
3570 | { | |
3571 | cp_binding_level *b = innermost_nonclass_level (); | |
a5e6b29b | 3572 | |
b655c310 NS |
3573 | return b->kind == sk_namespace || b->kind == sk_template_parms; |
3574 | } | |
a5e6b29b | 3575 | |
b655c310 NS |
3576 | /* True if this is a namespace scope, or if we are defining a class |
3577 | which is itself at namespace scope, or whose enclosing class is | |
3578 | such a class, etc. */ | |
a5e6b29b | 3579 | |
b655c310 NS |
3580 | bool |
3581 | namespace_bindings_p (void) | |
3582 | { | |
3583 | cp_binding_level *b = innermost_nonclass_level (); | |
a5e6b29b | 3584 | |
b655c310 NS |
3585 | return b->kind == sk_namespace; |
3586 | } | |
a5e6b29b | 3587 | |
b655c310 | 3588 | /* True if the innermost non-class scope is a block scope. */ |
a5e6b29b | 3589 | |
b655c310 NS |
3590 | bool |
3591 | local_bindings_p (void) | |
3592 | { | |
3593 | cp_binding_level *b = innermost_nonclass_level (); | |
3594 | return b->kind < sk_function_parms || b->kind == sk_omp; | |
3595 | } | |
a5e6b29b | 3596 | |
b655c310 | 3597 | /* True if the current level needs to have a BLOCK made. */ |
a5e6b29b | 3598 | |
b655c310 NS |
3599 | bool |
3600 | kept_level_p (void) | |
3601 | { | |
3602 | return (current_binding_level->blocks != NULL_TREE | |
3603 | || current_binding_level->keep | |
3604 | || current_binding_level->kind == sk_cleanup | |
3605 | || current_binding_level->names != NULL_TREE | |
3606 | || current_binding_level->using_directives); | |
575bfb00 LC |
3607 | } |
3608 | ||
b655c310 | 3609 | /* Returns the kind of the innermost scope. */ |
575bfb00 | 3610 | |
b655c310 NS |
3611 | scope_kind |
3612 | innermost_scope_kind (void) | |
575bfb00 | 3613 | { |
b655c310 | 3614 | return current_binding_level->kind; |
a5e6b29b GDR |
3615 | } |
3616 | ||
b655c310 | 3617 | /* Returns true if this scope was created to store template parameters. */ |
5a167978 | 3618 | |
b655c310 NS |
3619 | bool |
3620 | template_parm_scope_p (void) | |
5a167978 | 3621 | { |
b655c310 NS |
3622 | return innermost_scope_kind () == sk_template_parms; |
3623 | } | |
7756db03 | 3624 | |
b655c310 NS |
3625 | /* If KEEP is true, make a BLOCK node for the next binding level, |
3626 | unconditionally. Otherwise, use the normal logic to decide whether | |
3627 | or not to create a BLOCK. */ | |
5a167978 | 3628 | |
b655c310 NS |
3629 | void |
3630 | keep_next_level (bool keep) | |
3631 | { | |
3632 | keep_next_level_flag = keep; | |
3633 | } | |
5a167978 | 3634 | |
9c82d7b6 | 3635 | /* Return the list of declarations of the current local scope. */ |
5a167978 | 3636 | |
b655c310 | 3637 | tree |
9c82d7b6 | 3638 | get_local_decls (void) |
b655c310 | 3639 | { |
9c82d7b6 NS |
3640 | gcc_assert (current_binding_level->kind != sk_namespace |
3641 | && current_binding_level->kind != sk_class); | |
b655c310 NS |
3642 | return current_binding_level->names; |
3643 | } | |
5a167978 | 3644 | |
b655c310 | 3645 | /* Return how many function prototypes we are currently nested inside. */ |
5a167978 | 3646 | |
b655c310 NS |
3647 | int |
3648 | function_parm_depth (void) | |
3649 | { | |
3650 | int level = 0; | |
3651 | cp_binding_level *b; | |
8597cab1 | 3652 | |
b655c310 NS |
3653 | for (b = current_binding_level; |
3654 | b->kind == sk_function_parms; | |
3655 | b = b->level_chain) | |
3656 | ++level; | |
3657 | ||
3658 | return level; | |
5a167978 GDR |
3659 | } |
3660 | ||
b655c310 NS |
3661 | /* For debugging. */ |
3662 | static int no_print_functions = 0; | |
3663 | static int no_print_builtins = 0; | |
5a167978 GDR |
3664 | |
3665 | static void | |
b655c310 | 3666 | print_binding_level (cp_binding_level* lvl) |
5a167978 | 3667 | { |
b655c310 NS |
3668 | tree t; |
3669 | int i = 0, len; | |
3670 | fprintf (stderr, " blocks=%p", (void *) lvl->blocks); | |
3671 | if (lvl->more_cleanups_ok) | |
3672 | fprintf (stderr, " more-cleanups-ok"); | |
3673 | if (lvl->have_cleanups) | |
3674 | fprintf (stderr, " have-cleanups"); | |
3675 | fprintf (stderr, "\n"); | |
3676 | if (lvl->names) | |
3677 | { | |
3678 | fprintf (stderr, " names:\t"); | |
3679 | /* We can probably fit 3 names to a line? */ | |
3680 | for (t = lvl->names; t; t = TREE_CHAIN (t)) | |
3681 | { | |
3682 | if (no_print_functions && (TREE_CODE (t) == FUNCTION_DECL)) | |
3683 | continue; | |
3684 | if (no_print_builtins | |
3685 | && (TREE_CODE (t) == TYPE_DECL) | |
3686 | && DECL_IS_BUILTIN (t)) | |
3687 | continue; | |
5a167978 | 3688 | |
b655c310 NS |
3689 | /* Function decls tend to have longer names. */ |
3690 | if (TREE_CODE (t) == FUNCTION_DECL) | |
3691 | len = 3; | |
3692 | else | |
3693 | len = 2; | |
3694 | i += len; | |
3695 | if (i > 6) | |
3696 | { | |
3697 | fprintf (stderr, "\n\t"); | |
3698 | i = len; | |
3699 | } | |
3700 | print_node_brief (stderr, "", t, 0); | |
3701 | if (t == error_mark_node) | |
3702 | break; | |
3703 | } | |
3704 | if (i) | |
3705 | fprintf (stderr, "\n"); | |
3706 | } | |
3707 | if (vec_safe_length (lvl->class_shadowed)) | |
5a167978 | 3708 | { |
b655c310 NS |
3709 | size_t i; |
3710 | cp_class_binding *b; | |
3711 | fprintf (stderr, " class-shadowed:"); | |
3712 | FOR_EACH_VEC_ELT (*lvl->class_shadowed, i, b) | |
3713 | fprintf (stderr, " %s ", IDENTIFIER_POINTER (b->identifier)); | |
3714 | fprintf (stderr, "\n"); | |
5a167978 | 3715 | } |
b655c310 | 3716 | if (lvl->type_shadowed) |
44fd0e80 | 3717 | { |
b655c310 NS |
3718 | fprintf (stderr, " type-shadowed:"); |
3719 | for (t = lvl->type_shadowed; t; t = TREE_CHAIN (t)) | |
3720 | { | |
3721 | fprintf (stderr, " %s ", IDENTIFIER_POINTER (TREE_PURPOSE (t))); | |
3722 | } | |
3723 | fprintf (stderr, "\n"); | |
44fd0e80 | 3724 | } |
b655c310 | 3725 | } |
44fd0e80 | 3726 | |
b655c310 NS |
3727 | DEBUG_FUNCTION void |
3728 | debug (cp_binding_level &ref) | |
3729 | { | |
3730 | print_binding_level (&ref); | |
3731 | } | |
3732 | ||
3733 | DEBUG_FUNCTION void | |
3734 | debug (cp_binding_level *ptr) | |
3735 | { | |
3736 | if (ptr) | |
3737 | debug (*ptr); | |
3738 | else | |
3739 | fprintf (stderr, "<nil>\n"); | |
3740 | } | |
3741 | ||
3742 | ||
d4e15523 | 3743 | static void |
b655c310 NS |
3744 | print_other_binding_stack (cp_binding_level *stack) |
3745 | { | |
3746 | cp_binding_level *level; | |
3747 | for (level = stack; !global_scope_p (level); level = level->level_chain) | |
44fd0e80 | 3748 | { |
b655c310 NS |
3749 | fprintf (stderr, "binding level %p\n", (void *) level); |
3750 | print_binding_level (level); | |
44fd0e80 | 3751 | } |
b655c310 | 3752 | } |
44fd0e80 | 3753 | |
b655c310 NS |
3754 | void |
3755 | print_binding_stack (void) | |
3756 | { | |
3757 | cp_binding_level *b; | |
3758 | fprintf (stderr, "current_binding_level=%p\n" | |
3759 | "class_binding_level=%p\n" | |
3760 | "NAMESPACE_LEVEL (global_namespace)=%p\n", | |
3761 | (void *) current_binding_level, (void *) class_binding_level, | |
3762 | (void *) NAMESPACE_LEVEL (global_namespace)); | |
3763 | if (class_binding_level) | |
5a167978 | 3764 | { |
b655c310 NS |
3765 | for (b = class_binding_level; b; b = b->level_chain) |
3766 | if (b == current_binding_level) | |
3767 | break; | |
3768 | if (b) | |
3769 | b = class_binding_level; | |
3770 | else | |
3771 | b = current_binding_level; | |
3772 | } | |
3773 | else | |
3774 | b = current_binding_level; | |
3775 | print_other_binding_stack (b); | |
3776 | fprintf (stderr, "global:\n"); | |
3777 | print_binding_level (NAMESPACE_LEVEL (global_namespace)); | |
3778 | } | |
3779 | \f | |
3780 | /* Return the type associated with ID. */ | |
5a167978 | 3781 | |
b655c310 NS |
3782 | static tree |
3783 | identifier_type_value_1 (tree id) | |
3784 | { | |
3785 | /* There is no type with that name, anywhere. */ | |
3786 | if (REAL_IDENTIFIER_TYPE_VALUE (id) == NULL_TREE) | |
3787 | return NULL_TREE; | |
3788 | /* This is not the type marker, but the real thing. */ | |
3789 | if (REAL_IDENTIFIER_TYPE_VALUE (id) != global_type_node) | |
3790 | return REAL_IDENTIFIER_TYPE_VALUE (id); | |
3791 | /* Have to search for it. It must be on the global level, now. | |
3792 | Ask lookup_name not to return non-types. */ | |
3793 | id = lookup_name_real (id, 2, 1, /*block_p=*/true, 0, 0); | |
3794 | if (id) | |
3795 | return TREE_TYPE (id); | |
3796 | return NULL_TREE; | |
3797 | } | |
44fd0e80 | 3798 | |
b655c310 | 3799 | /* Wrapper for identifier_type_value_1. */ |
1374a761 | 3800 | |
b655c310 NS |
3801 | tree |
3802 | identifier_type_value (tree id) | |
3803 | { | |
3804 | tree ret; | |
3805 | timevar_start (TV_NAME_LOOKUP); | |
3806 | ret = identifier_type_value_1 (id); | |
3807 | timevar_stop (TV_NAME_LOOKUP); | |
3808 | return ret; | |
3809 | } | |
44fd0e80 | 3810 | |
b655c310 NS |
3811 | /* Push a definition of struct, union or enum tag named ID. into |
3812 | binding_level B. DECL is a TYPE_DECL for the type. We assume that | |
3813 | the tag ID is not already defined. */ | |
1374a761 | 3814 | |
b655c310 NS |
3815 | static void |
3816 | set_identifier_type_value_with_scope (tree id, tree decl, cp_binding_level *b) | |
3817 | { | |
3818 | tree type; | |
5a167978 | 3819 | |
b655c310 | 3820 | if (b->kind != sk_namespace) |
5a167978 | 3821 | { |
b655c310 NS |
3822 | /* Shadow the marker, not the real thing, so that the marker |
3823 | gets restored later. */ | |
3824 | tree old_type_value = REAL_IDENTIFIER_TYPE_VALUE (id); | |
3825 | b->type_shadowed | |
3826 | = tree_cons (id, old_type_value, b->type_shadowed); | |
3827 | type = decl ? TREE_TYPE (decl) : NULL_TREE; | |
3828 | TREE_TYPE (b->type_shadowed) = type; | |
19831e2b OW |
3829 | } |
3830 | else | |
3831 | { | |
3c9cca88 NS |
3832 | tree *slot = find_namespace_slot (current_namespace, id, true); |
3833 | gcc_assert (decl); | |
3834 | update_binding (b, NULL, slot, MAYBE_STAT_DECL (*slot), decl, false); | |
44fd0e80 | 3835 | |
b655c310 NS |
3836 | /* Store marker instead of real type. */ |
3837 | type = global_type_node; | |
3838 | } | |
3839 | SET_IDENTIFIER_TYPE_VALUE (id, type); | |
5a167978 GDR |
3840 | } |
3841 | ||
b655c310 NS |
3842 | /* As set_identifier_type_value_with_scope, but using |
3843 | current_binding_level. */ | |
5a167978 GDR |
3844 | |
3845 | void | |
b655c310 | 3846 | set_identifier_type_value (tree id, tree decl) |
5a167978 | 3847 | { |
b655c310 NS |
3848 | set_identifier_type_value_with_scope (id, decl, current_binding_level); |
3849 | } | |
5a167978 | 3850 | |
b655c310 | 3851 | /* Return the name for the constructor (or destructor) for the |
5fee5eca | 3852 | specified class. */ |
5a167978 | 3853 | |
b655c310 NS |
3854 | tree |
3855 | constructor_name (tree type) | |
3856 | { | |
56b2a94b NS |
3857 | tree decl = TYPE_NAME (TYPE_MAIN_VARIANT (type)); |
3858 | ||
3859 | return decl ? DECL_NAME (decl) : NULL_TREE; | |
b655c310 | 3860 | } |
5a167978 | 3861 | |
b655c310 NS |
3862 | /* Returns TRUE if NAME is the name for the constructor for TYPE, |
3863 | which must be a class type. */ | |
5a167978 | 3864 | |
b655c310 NS |
3865 | bool |
3866 | constructor_name_p (tree name, tree type) | |
3867 | { | |
b655c310 NS |
3868 | gcc_assert (MAYBE_CLASS_TYPE_P (type)); |
3869 | ||
b655c310 NS |
3870 | /* These don't have names. */ |
3871 | if (TREE_CODE (type) == DECLTYPE_TYPE | |
3872 | || TREE_CODE (type) == TYPEOF_TYPE) | |
3873 | return false; | |
3874 | ||
56b2a94b | 3875 | if (name && name == constructor_name (type)) |
b655c310 | 3876 | return true; |
5fee5eca | 3877 | |
b655c310 | 3878 | return false; |
5a167978 GDR |
3879 | } |
3880 | ||
b655c310 | 3881 | /* Counter used to create anonymous type names. */ |
5a167978 | 3882 | |
b655c310 NS |
3883 | static GTY(()) int anon_cnt; |
3884 | ||
3885 | /* Return an IDENTIFIER which can be used as a name for | |
3886 | unnamed structs and unions. */ | |
3887 | ||
3888 | tree | |
3889 | make_anon_name (void) | |
5a167978 | 3890 | { |
b655c310 NS |
3891 | char buf[32]; |
3892 | ||
3893 | sprintf (buf, anon_aggrname_format (), anon_cnt++); | |
3894 | return get_identifier (buf); | |
3895 | } | |
3896 | ||
3897 | /* This code is practically identical to that for creating | |
3898 | anonymous names, but is just used for lambdas instead. This isn't really | |
3899 | necessary, but it's convenient to avoid treating lambdas like other | |
3900 | unnamed types. */ | |
3901 | ||
3902 | static GTY(()) int lambda_cnt = 0; | |
3903 | ||
3904 | tree | |
3905 | make_lambda_name (void) | |
3906 | { | |
3907 | char buf[32]; | |
3908 | ||
3909 | sprintf (buf, LAMBDANAME_FORMAT, lambda_cnt++); | |
3910 | return get_identifier (buf); | |
3911 | } | |
c8094d83 | 3912 | |
b655c310 NS |
3913 | /* Insert another USING_DECL into the current binding level, returning |
3914 | this declaration. If this is a redeclaration, do nothing, and | |
3915 | return NULL_TREE if this not in namespace scope (in namespace | |
3916 | scope, a using decl might extend any previous bindings). */ | |
87c465f5 | 3917 | |
b655c310 NS |
3918 | static tree |
3919 | push_using_decl_1 (tree scope, tree name) | |
87c465f5 | 3920 | { |
b655c310 | 3921 | tree decl; |
87c465f5 | 3922 | |
b655c310 NS |
3923 | gcc_assert (TREE_CODE (scope) == NAMESPACE_DECL); |
3924 | gcc_assert (identifier_p (name)); | |
3925 | for (decl = current_binding_level->usings; decl; decl = DECL_CHAIN (decl)) | |
3926 | if (USING_DECL_SCOPE (decl) == scope && DECL_NAME (decl) == name) | |
3927 | break; | |
3928 | if (decl) | |
3929 | return namespace_bindings_p () ? decl : NULL_TREE; | |
3930 | decl = build_lang_decl (USING_DECL, name, NULL_TREE); | |
3931 | USING_DECL_SCOPE (decl) = scope; | |
3932 | DECL_CHAIN (decl) = current_binding_level->usings; | |
3933 | current_binding_level->usings = decl; | |
3934 | return decl; | |
87c465f5 KL |
3935 | } |
3936 | ||
b655c310 | 3937 | /* Wrapper for push_using_decl_1. */ |
87c465f5 | 3938 | |
b655c310 NS |
3939 | static tree |
3940 | push_using_decl (tree scope, tree name) | |
87c465f5 | 3941 | { |
b655c310 NS |
3942 | tree ret; |
3943 | timevar_start (TV_NAME_LOOKUP); | |
3944 | ret = push_using_decl_1 (scope, name); | |
3945 | timevar_stop (TV_NAME_LOOKUP); | |
3946 | return ret; | |
3947 | } | |
87c465f5 | 3948 | |
b655c310 NS |
3949 | /* Same as pushdecl, but define X in binding-level LEVEL. We rely on the |
3950 | caller to set DECL_CONTEXT properly. | |
87c465f5 | 3951 | |
b655c310 NS |
3952 | Note that this must only be used when X will be the new innermost |
3953 | binding for its name, as we tack it onto the front of IDENTIFIER_BINDING | |
3954 | without checking to see if the current IDENTIFIER_BINDING comes from a | |
3955 | closer binding level than LEVEL. */ | |
87c465f5 | 3956 | |
b655c310 | 3957 | static tree |
5256a7f5 | 3958 | do_pushdecl_with_scope (tree x, cp_binding_level *level, bool is_friend) |
b655c310 NS |
3959 | { |
3960 | cp_binding_level *b; | |
87c465f5 | 3961 | |
b655c310 NS |
3962 | if (level->kind == sk_class) |
3963 | { | |
3964 | b = class_binding_level; | |
3965 | class_binding_level = level; | |
3966 | pushdecl_class_level (x); | |
3967 | class_binding_level = b; | |
3968 | } | |
3969 | else | |
3970 | { | |
d04e6ed5 NS |
3971 | tree function_decl = current_function_decl; |
3972 | if (level->kind == sk_namespace) | |
3973 | current_function_decl = NULL_TREE; | |
b655c310 NS |
3974 | b = current_binding_level; |
3975 | current_binding_level = level; | |
4f15a5da | 3976 | x = pushdecl (x, is_friend); |
b655c310 | 3977 | current_binding_level = b; |
d04e6ed5 | 3978 | current_function_decl = function_decl; |
87c465f5 | 3979 | } |
b655c310 | 3980 | return x; |
87c465f5 | 3981 | } |
9e931c2a | 3982 | |
d16d5eac | 3983 | /* Inject X into the local scope just before the function parms. */ |
00e8de68 | 3984 | |
b655c310 | 3985 | tree |
d16d5eac | 3986 | pushdecl_outermost_localscope (tree x) |
00e8de68 | 3987 | { |
c8634a1a | 3988 | cp_binding_level *b = NULL; |
b655c310 | 3989 | bool subtime = timevar_cond_start (TV_NAME_LOOKUP); |
d16d5eac | 3990 | |
c8634a1a NS |
3991 | /* Find the scope just inside the function parms. */ |
3992 | for (cp_binding_level *n = current_binding_level; | |
3993 | n->kind != sk_function_parms; n = b->level_chain) | |
3994 | b = n; | |
3995 | ||
5256a7f5 | 3996 | tree ret = b ? do_pushdecl_with_scope (x, b, false) : error_mark_node; |
b655c310 | 3997 | timevar_cond_stop (TV_NAME_LOOKUP, subtime); |
c8634a1a | 3998 | |
b655c310 | 3999 | return ret; |
00e8de68 GDR |
4000 | } |
4001 | ||
b655c310 NS |
4002 | /* Check a non-member using-declaration. Return the name and scope |
4003 | being used, and the USING_DECL, or NULL_TREE on failure. */ | |
d2f2c87b | 4004 | |
b655c310 NS |
4005 | static tree |
4006 | validate_nonmember_using_decl (tree decl, tree scope, tree name) | |
4007 | { | |
4008 | /* [namespace.udecl] | |
4009 | A using-declaration for a class member shall be a | |
4010 | member-declaration. */ | |
4011 | if (TYPE_P (scope)) | |
90ea9897 | 4012 | { |
b655c310 NS |
4013 | error ("%qT is not a namespace or unscoped enum", scope); |
4014 | return NULL_TREE; | |
d2f2c87b | 4015 | } |
b655c310 NS |
4016 | else if (scope == error_mark_node) |
4017 | return NULL_TREE; | |
d2f2c87b | 4018 | |
b655c310 | 4019 | if (TREE_CODE (decl) == TEMPLATE_ID_EXPR) |
90ea9897 | 4020 | { |
b655c310 NS |
4021 | /* 7.3.3/5 |
4022 | A using-declaration shall not name a template-id. */ | |
4023 | error ("a using-declaration cannot specify a template-id. " | |
4024 | "Try %<using %D%>", name); | |
4025 | return NULL_TREE; | |
90ea9897 MM |
4026 | } |
4027 | ||
b655c310 | 4028 | if (TREE_CODE (decl) == NAMESPACE_DECL) |
00e8de68 | 4029 | { |
b655c310 NS |
4030 | error ("namespace %qD not allowed in using-declaration", decl); |
4031 | return NULL_TREE; | |
00e8de68 GDR |
4032 | } |
4033 | ||
b655c310 | 4034 | if (TREE_CODE (decl) == SCOPE_REF) |
90ea9897 | 4035 | { |
b655c310 NS |
4036 | /* It's a nested name with template parameter dependent scope. |
4037 | This can only be using-declaration for class member. */ | |
4038 | error ("%qT is not a namespace", TREE_OPERAND (decl, 0)); | |
4039 | return NULL_TREE; | |
90ea9897 | 4040 | } |
00e8de68 | 4041 | |
9d029ddf | 4042 | decl = OVL_FIRST (decl); |
575bfb00 | 4043 | |
b655c310 NS |
4044 | /* Make a USING_DECL. */ |
4045 | tree using_decl = push_using_decl (scope, name); | |
575bfb00 | 4046 | |
b655c310 NS |
4047 | if (using_decl == NULL_TREE |
4048 | && at_function_scope_p () | |
4049 | && VAR_P (decl)) | |
4050 | /* C++11 7.3.3/10. */ | |
4051 | error ("%qD is already declared in this scope", name); | |
4052 | ||
4053 | return using_decl; | |
00e8de68 GDR |
4054 | } |
4055 | ||
9d029ddf NS |
4056 | /* Process a local-scope or namespace-scope using declaration. SCOPE |
4057 | is the nominated scope to search for NAME. VALUE_P and TYPE_P | |
4058 | point to the binding for NAME in the current scope and are | |
4059 | updated. */ | |
1d786913 | 4060 | |
b655c310 | 4061 | static void |
9d029ddf | 4062 | do_nonmember_using_decl (tree scope, tree name, tree *value_p, tree *type_p) |
5a167978 | 4063 | { |
9dda0ace | 4064 | name_lookup lookup (name, 0); |
c8094d83 | 4065 | |
9dda0ace | 4066 | if (!qualified_namespace_lookup (scope, &lookup)) |
5a167978 | 4067 | { |
b655c310 NS |
4068 | error ("%qD not declared", name); |
4069 | return; | |
5a167978 | 4070 | } |
9d029ddf NS |
4071 | else if (TREE_CODE (lookup.value) == TREE_LIST) |
4072 | { | |
4073 | error ("reference to %qD is ambiguous", name); | |
4074 | print_candidates (lookup.value); | |
4075 | lookup.value = NULL_TREE; | |
4076 | } | |
4077 | ||
4078 | if (lookup.type && TREE_CODE (lookup.type) == TREE_LIST) | |
4079 | { | |
4080 | error ("reference to %qD is ambiguous", name); | |
4081 | print_candidates (lookup.type); | |
4082 | lookup.type = NULL_TREE; | |
4083 | } | |
4084 | ||
4085 | tree value = *value_p; | |
4086 | tree type = *type_p; | |
98ed9dae | 4087 | |
b655c310 NS |
4088 | /* Shift the old and new bindings around so we're comparing class and |
4089 | enumeration names to each other. */ | |
9d029ddf | 4090 | if (value && DECL_IMPLICIT_TYPEDEF_P (value)) |
5a167978 | 4091 | { |
9d029ddf NS |
4092 | type = value; |
4093 | value = NULL_TREE; | |
98ed9dae | 4094 | } |
b655c310 | 4095 | |
9d029ddf | 4096 | if (lookup.value && DECL_IMPLICIT_TYPEDEF_P (lookup.value)) |
140bec21 | 4097 | { |
9d029ddf NS |
4098 | lookup.type = lookup.value; |
4099 | lookup.value = NULL_TREE; | |
140bec21 | 4100 | } |
b655c310 | 4101 | |
9d029ddf | 4102 | if (lookup.value && lookup.value != value) |
98ed9dae | 4103 | { |
b655c310 | 4104 | /* Check for using functions. */ |
9d029ddf | 4105 | if (OVL_P (lookup.value) && (!value || OVL_P (value))) |
b655c310 | 4106 | { |
9d029ddf | 4107 | for (lkp_iterator usings (lookup.value); usings; ++usings) |
b655c310 | 4108 | { |
9d029ddf | 4109 | tree new_fn = *usings; |
577b02d8 | 4110 | |
b655c310 | 4111 | /* [namespace.udecl] |
c8094d83 | 4112 | |
b655c310 NS |
4113 | If a function declaration in namespace scope or block |
4114 | scope has the same name and the same parameter types as a | |
4115 | function introduced by a using declaration the program is | |
4116 | ill-formed. */ | |
9d029ddf NS |
4117 | bool found = false; |
4118 | for (ovl_iterator old (value); !found && old; ++old) | |
b655c310 | 4119 | { |
9d029ddf | 4120 | tree old_fn = *old; |
3db45ab5 | 4121 | |
b655c310 | 4122 | if (new_fn == old_fn) |
9d029ddf NS |
4123 | /* The function already exists in the current |
4124 | namespace. */ | |
4125 | found = true; | |
4126 | else if (old.using_p ()) | |
4127 | continue; /* This is a using decl. */ | |
ef4c5e78 | 4128 | else if (old.hidden_p () && !DECL_HIDDEN_FRIEND_P (old_fn)) |
9d029ddf NS |
4129 | continue; /* This is an anticipated builtin. */ |
4130 | else if (!matching_fn_p (new_fn, old_fn)) | |
4131 | continue; /* Parameters do not match. */ | |
4132 | else if (decls_match (new_fn, old_fn)) | |
4133 | found = true; | |
4134 | else | |
b655c310 | 4135 | { |
9d029ddf NS |
4136 | diagnose_name_conflict (new_fn, old_fn); |
4137 | found = true; | |
b655c310 NS |
4138 | } |
4139 | } | |
1e9f5818 | 4140 | |
9d029ddf NS |
4141 | if (!found) |
4142 | /* Unlike the overload case we don't drop anticipated | |
4143 | builtins here. They don't cause a problem, and | |
4144 | we'd like to match them with a future | |
4145 | declaration. */ | |
4146 | value = ovl_insert (new_fn, value, true); | |
b01e6d2b | 4147 | } |
98ed9dae | 4148 | } |
9d029ddf NS |
4149 | else if (value |
4150 | /* Ignore anticipated builtins. */ | |
ef4c5e78 | 4151 | && !anticipated_builtin_p (value) |
9d029ddf NS |
4152 | && !decls_match (lookup.value, value)) |
4153 | diagnose_name_conflict (lookup.value, value); | |
b655c310 | 4154 | else |
9d029ddf | 4155 | value = lookup.value; |
b655c310 NS |
4156 | } |
4157 | ||
9d029ddf | 4158 | if (lookup.type && lookup.type != type) |
b655c310 | 4159 | { |
9d029ddf NS |
4160 | if (type && !decls_match (lookup.type, type)) |
4161 | diagnose_name_conflict (lookup.type, type); | |
b655c310 | 4162 | else |
9d029ddf | 4163 | type = lookup.type; |
b655c310 | 4164 | } |
9d029ddf NS |
4165 | |
4166 | /* If bind->value is empty, shift any class or enumeration name back. */ | |
4167 | if (!value) | |
b655c310 | 4168 | { |
9d029ddf NS |
4169 | value = type; |
4170 | type = NULL_TREE; | |
1e9f5818 | 4171 | } |
98ed9dae | 4172 | |
9d029ddf NS |
4173 | *value_p = value; |
4174 | *type_p = type; | |
5a167978 GDR |
4175 | } |
4176 | ||
322763f5 NS |
4177 | /* Returns true if ANCESTOR encloses DESCENDANT, including matching. |
4178 | Both are namespaces. */ | |
4179 | ||
4180 | bool | |
4181 | is_nested_namespace (tree ancestor, tree descendant, bool inline_only) | |
4182 | { | |
4183 | int depth = SCOPE_DEPTH (ancestor); | |
4184 | ||
4185 | if (!depth && !inline_only) | |
4186 | /* The global namespace encloses everything. */ | |
4187 | return true; | |
4188 | ||
4189 | while (SCOPE_DEPTH (descendant) > depth | |
4190 | && (!inline_only || DECL_NAMESPACE_INLINE_P (descendant))) | |
4191 | descendant = CP_DECL_CONTEXT (descendant); | |
4192 | ||
4193 | return ancestor == descendant; | |
4194 | } | |
4195 | ||
b655c310 NS |
4196 | /* Returns true if ROOT (a namespace, class, or function) encloses |
4197 | CHILD. CHILD may be either a class type or a namespace. */ | |
575bfb00 | 4198 | |
b655c310 NS |
4199 | bool |
4200 | is_ancestor (tree root, tree child) | |
00e8de68 | 4201 | { |
b655c310 NS |
4202 | gcc_assert ((TREE_CODE (root) == NAMESPACE_DECL |
4203 | || TREE_CODE (root) == FUNCTION_DECL | |
4204 | || CLASS_TYPE_P (root))); | |
4205 | gcc_assert ((TREE_CODE (child) == NAMESPACE_DECL | |
4206 | || CLASS_TYPE_P (child))); | |
00e8de68 | 4207 | |
b655c310 NS |
4208 | /* The global namespace encloses everything. */ |
4209 | if (root == global_namespace) | |
4210 | return true; | |
00e8de68 | 4211 | |
322763f5 NS |
4212 | /* Search until we reach namespace scope. */ |
4213 | while (TREE_CODE (child) != NAMESPACE_DECL) | |
b655c310 | 4214 | { |
b655c310 NS |
4215 | /* If we've reached the ROOT, it encloses CHILD. */ |
4216 | if (root == child) | |
4217 | return true; | |
4218 | /* Go out one level. */ | |
4219 | if (TYPE_P (child)) | |
4220 | child = TYPE_NAME (child); | |
322763f5 | 4221 | child = CP_DECL_CONTEXT (child); |
b655c310 | 4222 | } |
322763f5 NS |
4223 | |
4224 | if (TREE_CODE (root) == NAMESPACE_DECL) | |
4225 | return is_nested_namespace (root, child); | |
4226 | ||
4227 | return false; | |
575bfb00 LC |
4228 | } |
4229 | ||
b655c310 NS |
4230 | /* Enter the class or namespace scope indicated by T suitable for name |
4231 | lookup. T can be arbitrary scope, not necessary nested inside the | |
4232 | current scope. Returns a non-null scope to pop iff pop_scope | |
4233 | should be called later to exit this scope. */ | |
ed3cf953 | 4234 | |
b655c310 NS |
4235 | tree |
4236 | push_scope (tree t) | |
ed3cf953 | 4237 | { |
b655c310 NS |
4238 | if (TREE_CODE (t) == NAMESPACE_DECL) |
4239 | push_decl_namespace (t); | |
4240 | else if (CLASS_TYPE_P (t)) | |
4241 | { | |
4242 | if (!at_class_scope_p () | |
4243 | || !same_type_p (current_class_type, t)) | |
4244 | push_nested_class (t); | |
4245 | else | |
4246 | /* T is the same as the current scope. There is therefore no | |
4247 | need to re-enter the scope. Since we are not actually | |
4248 | pushing a new scope, our caller should not call | |
4249 | pop_scope. */ | |
4250 | t = NULL_TREE; | |
4251 | } | |
ed3cf953 | 4252 | |
b655c310 | 4253 | return t; |
575bfb00 LC |
4254 | } |
4255 | ||
b655c310 | 4256 | /* Leave scope pushed by push_scope. */ |
575bfb00 LC |
4257 | |
4258 | void | |
b655c310 | 4259 | pop_scope (tree t) |
575bfb00 | 4260 | { |
b655c310 NS |
4261 | if (t == NULL_TREE) |
4262 | return; | |
4263 | if (TREE_CODE (t) == NAMESPACE_DECL) | |
4264 | pop_decl_namespace (); | |
4265 | else if CLASS_TYPE_P (t) | |
4266 | pop_nested_class (); | |
ed3cf953 GDR |
4267 | } |
4268 | ||
b655c310 | 4269 | /* Subroutine of push_inner_scope. */ |
5a167978 | 4270 | |
b655c310 NS |
4271 | static void |
4272 | push_inner_scope_r (tree outer, tree inner) | |
5a167978 | 4273 | { |
b655c310 | 4274 | tree prev; |
5ae9ba3e | 4275 | |
b655c310 NS |
4276 | if (outer == inner |
4277 | || (TREE_CODE (inner) != NAMESPACE_DECL && !CLASS_TYPE_P (inner))) | |
abc088aa | 4278 | return; |
b655c310 NS |
4279 | |
4280 | prev = CP_DECL_CONTEXT (TREE_CODE (inner) == NAMESPACE_DECL ? inner : TYPE_NAME (inner)); | |
4281 | if (outer != prev) | |
4282 | push_inner_scope_r (outer, prev); | |
4283 | if (TREE_CODE (inner) == NAMESPACE_DECL) | |
5ae9ba3e | 4284 | { |
b655c310 NS |
4285 | cp_binding_level *save_template_parm = 0; |
4286 | /* Temporary take out template parameter scopes. They are saved | |
4287 | in reversed order in save_template_parm. */ | |
4288 | while (current_binding_level->kind == sk_template_parms) | |
160594b0 | 4289 | { |
b655c310 NS |
4290 | cp_binding_level *b = current_binding_level; |
4291 | current_binding_level = b->level_chain; | |
4292 | b->level_chain = save_template_parm; | |
4293 | save_template_parm = b; | |
160594b0 | 4294 | } |
b655c310 NS |
4295 | |
4296 | resume_scope (NAMESPACE_LEVEL (inner)); | |
4297 | current_namespace = inner; | |
4298 | ||
4299 | /* Restore template parameter scopes. */ | |
4300 | while (save_template_parm) | |
160594b0 | 4301 | { |
b655c310 NS |
4302 | cp_binding_level *b = save_template_parm; |
4303 | save_template_parm = b->level_chain; | |
4304 | b->level_chain = current_binding_level; | |
4305 | current_binding_level = b; | |
160594b0 | 4306 | } |
5ae9ba3e | 4307 | } |
b655c310 NS |
4308 | else |
4309 | pushclass (inner); | |
c8094d83 | 4310 | } |
5a167978 | 4311 | |
b655c310 NS |
4312 | /* Enter the scope INNER from current scope. INNER must be a scope |
4313 | nested inside current scope. This works with both name lookup and | |
4314 | pushing name into scope. In case a template parameter scope is present, | |
4315 | namespace is pushed under the template parameter scope according to | |
4316 | name lookup rule in 14.6.1/6. | |
4317 | ||
4318 | Return the former current scope suitable for pop_inner_scope. */ | |
5a167978 | 4319 | |
ae099258 | 4320 | tree |
b655c310 | 4321 | push_inner_scope (tree inner) |
5a167978 | 4322 | { |
b655c310 NS |
4323 | tree outer = current_scope (); |
4324 | if (!outer) | |
4325 | outer = current_namespace; | |
5a167978 | 4326 | |
b655c310 NS |
4327 | push_inner_scope_r (outer, inner); |
4328 | return outer; | |
5a167978 GDR |
4329 | } |
4330 | ||
b655c310 | 4331 | /* Exit the current scope INNER back to scope OUTER. */ |
00e8de68 | 4332 | |
b655c310 NS |
4333 | void |
4334 | pop_inner_scope (tree outer, tree inner) | |
0ed5edac | 4335 | { |
b655c310 NS |
4336 | if (outer == inner |
4337 | || (TREE_CODE (inner) != NAMESPACE_DECL && !CLASS_TYPE_P (inner))) | |
4338 | return; | |
0ed5edac | 4339 | |
b655c310 | 4340 | while (outer != inner) |
65567efa | 4341 | { |
b655c310 | 4342 | if (TREE_CODE (inner) == NAMESPACE_DECL) |
65567efa | 4343 | { |
b655c310 NS |
4344 | cp_binding_level *save_template_parm = 0; |
4345 | /* Temporary take out template parameter scopes. They are saved | |
4346 | in reversed order in save_template_parm. */ | |
4347 | while (current_binding_level->kind == sk_template_parms) | |
65567efa | 4348 | { |
b655c310 NS |
4349 | cp_binding_level *b = current_binding_level; |
4350 | current_binding_level = b->level_chain; | |
4351 | b->level_chain = save_template_parm; | |
4352 | save_template_parm = b; | |
65567efa JM |
4353 | } |
4354 | ||
b655c310 | 4355 | pop_namespace (); |
65567efa | 4356 | |
b655c310 NS |
4357 | /* Restore template parameter scopes. */ |
4358 | while (save_template_parm) | |
7cb73573 | 4359 | { |
b655c310 NS |
4360 | cp_binding_level *b = save_template_parm; |
4361 | save_template_parm = b->level_chain; | |
4362 | b->level_chain = current_binding_level; | |
4363 | current_binding_level = b; | |
7cb73573 | 4364 | } |
e3501bab | 4365 | } |
65567efa | 4366 | else |
b655c310 NS |
4367 | popclass (); |
4368 | ||
4369 | inner = CP_DECL_CONTEXT (TREE_CODE (inner) == NAMESPACE_DECL ? inner : TYPE_NAME (inner)); | |
65567efa | 4370 | } |
b655c310 NS |
4371 | } |
4372 | \f | |
4373 | /* Do a pushlevel for class declarations. */ | |
65567efa | 4374 | |
b655c310 NS |
4375 | void |
4376 | pushlevel_class (void) | |
4377 | { | |
4378 | class_binding_level = begin_scope (sk_class, current_class_type); | |
65567efa | 4379 | } |
0ed5edac | 4380 | |
b655c310 NS |
4381 | /* ...and a poplevel for class declarations. */ |
4382 | ||
4383 | void | |
4384 | poplevel_class (void) | |
00e8de68 | 4385 | { |
b655c310 NS |
4386 | cp_binding_level *level = class_binding_level; |
4387 | cp_class_binding *cb; | |
4388 | size_t i; | |
4389 | tree shadowed; | |
00e8de68 | 4390 | |
575bfb00 | 4391 | bool subtime = timevar_cond_start (TV_NAME_LOOKUP); |
b655c310 | 4392 | gcc_assert (level != 0); |
c8094d83 | 4393 | |
b655c310 NS |
4394 | /* If we're leaving a toplevel class, cache its binding level. */ |
4395 | if (current_class_depth == 1) | |
4396 | previous_class_level = level; | |
4397 | for (shadowed = level->type_shadowed; | |
4398 | shadowed; | |
4399 | shadowed = TREE_CHAIN (shadowed)) | |
4400 | SET_IDENTIFIER_TYPE_VALUE (TREE_PURPOSE (shadowed), TREE_VALUE (shadowed)); | |
00e8de68 | 4401 | |
b655c310 NS |
4402 | /* Remove the bindings for all of the class-level declarations. */ |
4403 | if (level->class_shadowed) | |
00e8de68 | 4404 | { |
b655c310 | 4405 | FOR_EACH_VEC_ELT (*level->class_shadowed, i, cb) |
0cbd7506 | 4406 | { |
b655c310 NS |
4407 | IDENTIFIER_BINDING (cb->identifier) = cb->base->previous; |
4408 | cxx_binding_free (cb->base); | |
0cbd7506 | 4409 | } |
b655c310 NS |
4410 | ggc_free (level->class_shadowed); |
4411 | level->class_shadowed = NULL; | |
00e8de68 GDR |
4412 | } |
4413 | ||
b655c310 NS |
4414 | /* Now, pop out of the binding level which we created up in the |
4415 | `pushlevel_class' routine. */ | |
4416 | gcc_assert (current_binding_level == level); | |
4417 | leave_scope (); | |
4418 | timevar_cond_stop (TV_NAME_LOOKUP, subtime); | |
4419 | } | |
4420 | ||
4421 | /* Set INHERITED_VALUE_BINDING_P on BINDING to true or false, as | |
4422 | appropriate. DECL is the value to which a name has just been | |
4423 | bound. CLASS_TYPE is the class in which the lookup occurred. */ | |
4424 | ||
4425 | static void | |
4426 | set_inherited_value_binding_p (cxx_binding *binding, tree decl, | |
4427 | tree class_type) | |
4428 | { | |
4429 | if (binding->value == decl && TREE_CODE (decl) != TREE_LIST) | |
00e8de68 | 4430 | { |
b655c310 NS |
4431 | tree context; |
4432 | ||
4433 | if (TREE_CODE (decl) == OVERLOAD) | |
4434 | context = ovl_scope (decl); | |
b9e75696 | 4435 | else |
ed36980c | 4436 | { |
b655c310 NS |
4437 | gcc_assert (DECL_P (decl)); |
4438 | context = context_for_name_lookup (decl); | |
ed36980c | 4439 | } |
00e8de68 | 4440 | |
b655c310 NS |
4441 | if (is_properly_derived_from (class_type, context)) |
4442 | INHERITED_VALUE_BINDING_P (binding) = 1; | |
4443 | else | |
4444 | INHERITED_VALUE_BINDING_P (binding) = 0; | |
4445 | } | |
4446 | else if (binding->value == decl) | |
4447 | /* We only encounter a TREE_LIST when there is an ambiguity in the | |
4448 | base classes. Such an ambiguity can be overridden by a | |
4449 | definition in this class. */ | |
4450 | INHERITED_VALUE_BINDING_P (binding) = 1; | |
4451 | else | |
4452 | INHERITED_VALUE_BINDING_P (binding) = 0; | |
00e8de68 GDR |
4453 | } |
4454 | ||
b655c310 | 4455 | /* Make the declaration of X appear in CLASS scope. */ |
00e8de68 | 4456 | |
b655c310 NS |
4457 | bool |
4458 | pushdecl_class_level (tree x) | |
00e8de68 | 4459 | { |
b655c310 NS |
4460 | bool is_valid = true; |
4461 | bool subtime; | |
00e8de68 | 4462 | |
b655c310 NS |
4463 | /* Do nothing if we're adding to an outer lambda closure type, |
4464 | outer_binding will add it later if it's needed. */ | |
4465 | if (current_class_type != class_binding_level->this_entity) | |
4466 | return true; | |
00e8de68 | 4467 | |
b655c310 NS |
4468 | subtime = timevar_cond_start (TV_NAME_LOOKUP); |
4469 | /* Get the name of X. */ | |
848bf88d | 4470 | tree name = OVL_NAME (x); |
00e8de68 | 4471 | |
b655c310 | 4472 | if (name) |
00e8de68 | 4473 | { |
b655c310 NS |
4474 | is_valid = push_class_level_binding (name, x); |
4475 | if (TREE_CODE (x) == TYPE_DECL) | |
4476 | set_identifier_type_value (name, x); | |
00e8de68 | 4477 | } |
b655c310 NS |
4478 | else if (ANON_AGGR_TYPE_P (TREE_TYPE (x))) |
4479 | { | |
4480 | /* If X is an anonymous aggregate, all of its members are | |
4481 | treated as if they were members of the class containing the | |
4482 | aggregate, for naming purposes. */ | |
6f87580f NS |
4483 | location_t save_location = input_location; |
4484 | tree anon = TREE_TYPE (x); | |
4485 | if (vec<tree, va_gc> *member_vec = CLASSTYPE_MEMBER_VEC (anon)) | |
4486 | for (unsigned ix = member_vec->length (); ix--;) | |
4487 | { | |
4488 | tree binding = (*member_vec)[ix]; | |
4489 | if (STAT_HACK_P (binding)) | |
4490 | { | |
4491 | if (!pushdecl_class_level (STAT_TYPE (binding))) | |
4492 | is_valid = false; | |
4493 | binding = STAT_DECL (binding); | |
4494 | } | |
4495 | if (!pushdecl_class_level (binding)) | |
4496 | is_valid = false; | |
b655c310 | 4497 | } |
6f87580f NS |
4498 | else |
4499 | for (tree f = TYPE_FIELDS (anon); f; f = DECL_CHAIN (f)) | |
4500 | if (TREE_CODE (f) == FIELD_DECL) | |
4501 | { | |
4502 | input_location = DECL_SOURCE_LOCATION (f); | |
4503 | if (!pushdecl_class_level (f)) | |
4504 | is_valid = false; | |
4505 | } | |
4506 | input_location = save_location; | |
b655c310 | 4507 | } |
575bfb00 | 4508 | timevar_cond_stop (TV_NAME_LOOKUP, subtime); |
b655c310 | 4509 | return is_valid; |
00e8de68 GDR |
4510 | } |
4511 | ||
b655c310 NS |
4512 | /* Return the BINDING (if any) for NAME in SCOPE, which is a class |
4513 | scope. If the value returned is non-NULL, and the PREVIOUS field | |
4514 | is not set, callers must set the PREVIOUS field explicitly. */ | |
5a167978 | 4515 | |
b655c310 NS |
4516 | static cxx_binding * |
4517 | get_class_binding (tree name, cp_binding_level *scope) | |
5a167978 | 4518 | { |
b655c310 NS |
4519 | tree class_type; |
4520 | tree type_binding; | |
4521 | tree value_binding; | |
4522 | cxx_binding *binding; | |
5a167978 | 4523 | |
b655c310 | 4524 | class_type = scope->this_entity; |
5a167978 | 4525 | |
b655c310 NS |
4526 | /* Get the type binding. */ |
4527 | type_binding = lookup_member (class_type, name, | |
4528 | /*protect=*/2, /*want_type=*/true, | |
4529 | tf_warning_or_error); | |
4530 | /* Get the value binding. */ | |
4531 | value_binding = lookup_member (class_type, name, | |
4532 | /*protect=*/2, /*want_type=*/false, | |
4533 | tf_warning_or_error); | |
5a167978 | 4534 | |
b655c310 NS |
4535 | if (value_binding |
4536 | && (TREE_CODE (value_binding) == TYPE_DECL | |
4537 | || DECL_CLASS_TEMPLATE_P (value_binding) | |
4538 | || (TREE_CODE (value_binding) == TREE_LIST | |
4539 | && TREE_TYPE (value_binding) == error_mark_node | |
4540 | && (TREE_CODE (TREE_VALUE (value_binding)) | |
4541 | == TYPE_DECL)))) | |
4542 | /* We found a type binding, even when looking for a non-type | |
4543 | binding. This means that we already processed this binding | |
4544 | above. */ | |
4545 | ; | |
4546 | else if (value_binding) | |
4547 | { | |
4548 | if (TREE_CODE (value_binding) == TREE_LIST | |
4549 | && TREE_TYPE (value_binding) == error_mark_node) | |
4550 | /* NAME is ambiguous. */ | |
4551 | ; | |
4552 | else if (BASELINK_P (value_binding)) | |
4553 | /* NAME is some overloaded functions. */ | |
4554 | value_binding = BASELINK_FUNCTIONS (value_binding); | |
4555 | } | |
5a167978 | 4556 | |
b655c310 NS |
4557 | /* If we found either a type binding or a value binding, create a |
4558 | new binding object. */ | |
4559 | if (type_binding || value_binding) | |
4560 | { | |
4561 | binding = new_class_binding (name, | |
4562 | value_binding, | |
4563 | type_binding, | |
4564 | scope); | |
4565 | /* This is a class-scope binding, not a block-scope binding. */ | |
4566 | LOCAL_BINDING_P (binding) = 0; | |
4567 | set_inherited_value_binding_p (binding, value_binding, class_type); | |
4568 | } | |
575bfb00 | 4569 | else |
b655c310 NS |
4570 | binding = NULL; |
4571 | ||
4572 | return binding; | |
575bfb00 LC |
4573 | } |
4574 | ||
b655c310 NS |
4575 | /* Make the declaration(s) of X appear in CLASS scope under the name |
4576 | NAME. Returns true if the binding is valid. */ | |
575bfb00 | 4577 | |
b655c310 NS |
4578 | static bool |
4579 | push_class_level_binding_1 (tree name, tree x) | |
575bfb00 | 4580 | { |
b655c310 NS |
4581 | cxx_binding *binding; |
4582 | tree decl = x; | |
4583 | bool ok; | |
5a167978 | 4584 | |
b655c310 NS |
4585 | /* The class_binding_level will be NULL if x is a template |
4586 | parameter name in a member template. */ | |
4587 | if (!class_binding_level) | |
4588 | return true; | |
5a167978 | 4589 | |
b655c310 NS |
4590 | if (name == error_mark_node) |
4591 | return false; | |
166206ce | 4592 | |
b655c310 NS |
4593 | /* Can happen for an erroneous declaration (c++/60384). */ |
4594 | if (!identifier_p (name)) | |
4595 | { | |
4596 | gcc_assert (errorcount || sorrycount); | |
4597 | return false; | |
4598 | } | |
5a167978 | 4599 | |
b655c310 NS |
4600 | /* Check for invalid member names. But don't worry about a default |
4601 | argument-scope lambda being pushed after the class is complete. */ | |
4602 | gcc_assert (TYPE_BEING_DEFINED (current_class_type) | |
4603 | || LAMBDA_TYPE_P (TREE_TYPE (decl))); | |
4604 | /* Check that we're pushing into the right binding level. */ | |
4605 | gcc_assert (current_class_type == class_binding_level->this_entity); | |
5a167978 | 4606 | |
b655c310 NS |
4607 | /* We could have been passed a tree list if this is an ambiguous |
4608 | declaration. If so, pull the declaration out because | |
4609 | check_template_shadow will not handle a TREE_LIST. */ | |
4610 | if (TREE_CODE (decl) == TREE_LIST | |
4611 | && TREE_TYPE (decl) == error_mark_node) | |
4612 | decl = TREE_VALUE (decl); | |
6097b0c3 | 4613 | |
b655c310 NS |
4614 | if (!check_template_shadow (decl)) |
4615 | return false; | |
5a167978 | 4616 | |
b655c310 | 4617 | /* [class.mem] |
00e8de68 | 4618 | |
b655c310 NS |
4619 | If T is the name of a class, then each of the following shall |
4620 | have a name different from T: | |
00e8de68 | 4621 | |
b655c310 | 4622 | -- every static data member of class T; |
00e8de68 | 4623 | |
b655c310 NS |
4624 | -- every member of class T that is itself a type; |
4625 | ||
4626 | -- every enumerator of every member of class T that is an | |
4627 | enumerated type; | |
4628 | ||
4629 | -- every member of every anonymous union that is a member of | |
4630 | class T. | |
4631 | ||
4632 | (Non-static data members were also forbidden to have the same | |
4633 | name as T until TC1.) */ | |
4634 | if ((VAR_P (x) | |
4635 | || TREE_CODE (x) == CONST_DECL | |
4636 | || (TREE_CODE (x) == TYPE_DECL | |
4637 | && !DECL_SELF_REFERENCE_P (x)) | |
4638 | /* A data member of an anonymous union. */ | |
4639 | || (TREE_CODE (x) == FIELD_DECL | |
4640 | && DECL_CONTEXT (x) != current_class_type)) | |
56b2a94b | 4641 | && DECL_NAME (x) == DECL_NAME (TYPE_NAME (current_class_type))) |
b655c310 NS |
4642 | { |
4643 | tree scope = context_for_name_lookup (x); | |
4644 | if (TYPE_P (scope) && same_type_p (scope, current_class_type)) | |
4645 | { | |
4646 | error ("%qD has the same name as the class in which it is " | |
4647 | "declared", | |
4648 | x); | |
4649 | return false; | |
4650 | } | |
4651 | } | |
4652 | ||
4653 | /* Get the current binding for NAME in this class, if any. */ | |
4654 | binding = IDENTIFIER_BINDING (name); | |
4655 | if (!binding || binding->scope != class_binding_level) | |
00e8de68 | 4656 | { |
b655c310 NS |
4657 | binding = get_class_binding (name, class_binding_level); |
4658 | /* If a new binding was created, put it at the front of the | |
4659 | IDENTIFIER_BINDING list. */ | |
4660 | if (binding) | |
0cbd7506 | 4661 | { |
b655c310 NS |
4662 | binding->previous = IDENTIFIER_BINDING (name); |
4663 | IDENTIFIER_BINDING (name) = binding; | |
0cbd7506 | 4664 | } |
b655c310 NS |
4665 | } |
4666 | ||
4667 | /* If there is already a binding, then we may need to update the | |
4668 | current value. */ | |
4669 | if (binding && binding->value) | |
4670 | { | |
4671 | tree bval = binding->value; | |
4672 | tree old_decl = NULL_TREE; | |
4673 | tree target_decl = strip_using_decl (decl); | |
4674 | tree target_bval = strip_using_decl (bval); | |
4675 | ||
4676 | if (INHERITED_VALUE_BINDING_P (binding)) | |
0cbd7506 | 4677 | { |
b655c310 NS |
4678 | /* If the old binding was from a base class, and was for a |
4679 | tag name, slide it over to make room for the new binding. | |
4680 | The old binding is still visible if explicitly qualified | |
4681 | with a class-key. */ | |
4682 | if (TREE_CODE (target_bval) == TYPE_DECL | |
4683 | && DECL_ARTIFICIAL (target_bval) | |
4684 | && !(TREE_CODE (target_decl) == TYPE_DECL | |
4685 | && DECL_ARTIFICIAL (target_decl))) | |
4686 | { | |
4687 | old_decl = binding->type; | |
4688 | binding->type = bval; | |
4689 | binding->value = NULL_TREE; | |
4690 | INHERITED_VALUE_BINDING_P (binding) = 0; | |
4691 | } | |
4692 | else | |
4693 | { | |
4694 | old_decl = bval; | |
4695 | /* Any inherited type declaration is hidden by the type | |
4696 | declaration in the derived class. */ | |
4697 | if (TREE_CODE (target_decl) == TYPE_DECL | |
4698 | && DECL_ARTIFICIAL (target_decl)) | |
4699 | binding->type = NULL_TREE; | |
4700 | } | |
00e8de68 | 4701 | } |
b655c310 | 4702 | else if (TREE_CODE (target_decl) == OVERLOAD |
5256a7f5 | 4703 | && OVL_P (target_bval)) |
b655c310 NS |
4704 | old_decl = bval; |
4705 | else if (TREE_CODE (decl) == USING_DECL | |
4706 | && TREE_CODE (bval) == USING_DECL | |
4707 | && same_type_p (USING_DECL_SCOPE (decl), | |
4708 | USING_DECL_SCOPE (bval))) | |
4709 | /* This is a using redeclaration that will be diagnosed later | |
4710 | in supplement_binding */ | |
4711 | ; | |
4712 | else if (TREE_CODE (decl) == USING_DECL | |
4713 | && TREE_CODE (bval) == USING_DECL | |
4714 | && DECL_DEPENDENT_P (decl) | |
4715 | && DECL_DEPENDENT_P (bval)) | |
4716 | return true; | |
4717 | else if (TREE_CODE (decl) == USING_DECL | |
5256a7f5 | 4718 | && OVL_P (target_bval)) |
b655c310 NS |
4719 | old_decl = bval; |
4720 | else if (TREE_CODE (bval) == USING_DECL | |
5256a7f5 | 4721 | && OVL_P (target_decl)) |
b655c310 NS |
4722 | return true; |
4723 | ||
4724 | if (old_decl && binding->scope == class_binding_level) | |
0cbd7506 | 4725 | { |
b655c310 NS |
4726 | binding->value = x; |
4727 | /* It is always safe to clear INHERITED_VALUE_BINDING_P | |
4728 | here. This function is only used to register bindings | |
4729 | from with the class definition itself. */ | |
4730 | INHERITED_VALUE_BINDING_P (binding) = 0; | |
4731 | return true; | |
0cbd7506 | 4732 | } |
00e8de68 | 4733 | } |
00e8de68 | 4734 | |
b655c310 NS |
4735 | /* Note that we declared this value so that we can issue an error if |
4736 | this is an invalid redeclaration of a name already used for some | |
4737 | other purpose. */ | |
4738 | note_name_declared_in_class (name, decl); | |
575bfb00 | 4739 | |
b655c310 NS |
4740 | /* If we didn't replace an existing binding, put the binding on the |
4741 | stack of bindings for the identifier, and update the shadowed | |
4742 | list. */ | |
4743 | if (binding && binding->scope == class_binding_level) | |
4744 | /* Supplement the existing binding. */ | |
4745 | ok = supplement_binding (binding, decl); | |
4746 | else | |
5a167978 | 4747 | { |
b655c310 NS |
4748 | /* Create a new binding. */ |
4749 | push_binding (name, decl, class_binding_level); | |
4750 | ok = true; | |
5a167978 GDR |
4751 | } |
4752 | ||
b655c310 | 4753 | return ok; |
575bfb00 LC |
4754 | } |
4755 | ||
b655c310 | 4756 | /* Wrapper for push_class_level_binding_1. */ |
575bfb00 | 4757 | |
b655c310 NS |
4758 | bool |
4759 | push_class_level_binding (tree name, tree x) | |
575bfb00 | 4760 | { |
b655c310 | 4761 | bool ret; |
575bfb00 | 4762 | bool subtime = timevar_cond_start (TV_NAME_LOOKUP); |
b655c310 | 4763 | ret = push_class_level_binding_1 (name, x); |
575bfb00 | 4764 | timevar_cond_stop (TV_NAME_LOOKUP, subtime); |
b655c310 | 4765 | return ret; |
5a167978 GDR |
4766 | } |
4767 | ||
b655c310 NS |
4768 | /* Process "using SCOPE::NAME" in a class scope. Return the |
4769 | USING_DECL created. */ | |
5a167978 | 4770 | |
b655c310 NS |
4771 | tree |
4772 | do_class_using_decl (tree scope, tree name) | |
5a167978 | 4773 | { |
b655c310 NS |
4774 | if (name == error_mark_node) |
4775 | return NULL_TREE; | |
166206ce | 4776 | |
b655c310 NS |
4777 | if (!scope || !TYPE_P (scope)) |
4778 | { | |
4779 | error ("using-declaration for non-member at class scope"); | |
4780 | return NULL_TREE; | |
4781 | } | |
166206ce | 4782 | |
b655c310 NS |
4783 | /* Make sure the name is not invalid */ |
4784 | if (TREE_CODE (name) == BIT_NOT_EXPR) | |
6097b0c3 | 4785 | { |
b655c310 NS |
4786 | error ("%<%T::%D%> names destructor", scope, name); |
4787 | return NULL_TREE; | |
6097b0c3 | 4788 | } |
0c29f2a2 | 4789 | |
b655c310 NS |
4790 | /* Using T::T declares inheriting ctors, even if T is a typedef. */ |
4791 | if (MAYBE_CLASS_TYPE_P (scope) | |
4792 | && (name == TYPE_IDENTIFIER (scope) | |
4793 | || constructor_name_p (name, scope))) | |
6097b0c3 | 4794 | { |
b655c310 NS |
4795 | maybe_warn_cpp0x (CPP0X_INHERITING_CTORS); |
4796 | name = ctor_identifier; | |
4797 | CLASSTYPE_NON_AGGREGATE (current_class_type) = true; | |
d19c0f4b | 4798 | } |
0c29f2a2 NS |
4799 | |
4800 | /* Cannot introduce a constructor name. */ | |
b655c310 NS |
4801 | if (constructor_name_p (name, current_class_type)) |
4802 | { | |
4803 | error ("%<%T::%D%> names constructor in %qT", | |
4804 | scope, name, current_class_type); | |
4805 | return NULL_TREE; | |
4806 | } | |
4807 | ||
b655c310 | 4808 | /* From [namespace.udecl]: |
1b255e8f | 4809 | |
b655c310 NS |
4810 | A using-declaration used as a member-declaration shall refer to a |
4811 | member of a base class of the class being defined. | |
4812 | ||
4813 | In general, we cannot check this constraint in a template because | |
4814 | we do not know the entire set of base classes of the current | |
4815 | class type. Morover, if SCOPE is dependent, it might match a | |
4816 | non-dependent base. */ | |
4817 | ||
0c29f2a2 NS |
4818 | tree decl = NULL_TREE; |
4819 | if (!dependent_scope_p (scope)) | |
86098eb8 | 4820 | { |
b655c310 | 4821 | base_kind b_kind; |
0c29f2a2 NS |
4822 | tree binfo = lookup_base (current_class_type, scope, ba_any, &b_kind, |
4823 | tf_warning_or_error); | |
b655c310 | 4824 | if (b_kind < bk_proper_base) |
86098eb8 | 4825 | { |
0c29f2a2 NS |
4826 | /* If there are dependent bases, scope might resolve at |
4827 | instantiation time, even if it isn't exactly one of the | |
4828 | dependent bases. */ | |
4829 | if (b_kind == bk_same_type || !any_dependent_bases_p ()) | |
9deb204a | 4830 | { |
b655c310 NS |
4831 | error_not_base_type (scope, current_class_type); |
4832 | return NULL_TREE; | |
9deb204a | 4833 | } |
86098eb8 | 4834 | } |
84eb0f1a | 4835 | else if (name == ctor_identifier && !binfo_direct_p (binfo)) |
b655c310 NS |
4836 | { |
4837 | error ("cannot inherit constructors from indirect base %qT", scope); | |
4838 | return NULL_TREE; | |
4839 | } | |
0c29f2a2 NS |
4840 | else if (!IDENTIFIER_CONV_OP_P (name) |
4841 | || !dependent_type_p (TREE_TYPE (name))) | |
b655c310 NS |
4842 | { |
4843 | decl = lookup_member (binfo, name, 0, false, tf_warning_or_error); | |
4844 | if (!decl) | |
4845 | { | |
4846 | error ("no members matching %<%T::%D%> in %q#T", scope, name, | |
4847 | scope); | |
4848 | return NULL_TREE; | |
4849 | } | |
0c29f2a2 | 4850 | |
b655c310 NS |
4851 | /* The binfo from which the functions came does not matter. */ |
4852 | if (BASELINK_P (decl)) | |
4853 | decl = BASELINK_FUNCTIONS (decl); | |
4854 | } | |
86098eb8 | 4855 | } |
86098eb8 | 4856 | |
0c29f2a2 | 4857 | tree value = build_lang_decl (USING_DECL, name, NULL_TREE); |
b655c310 NS |
4858 | USING_DECL_DECLS (value) = decl; |
4859 | USING_DECL_SCOPE (value) = scope; | |
4860 | DECL_DEPENDENT_P (value) = !decl; | |
a5e6b29b | 4861 | |
b655c310 | 4862 | return value; |
a5e6b29b GDR |
4863 | } |
4864 | ||
b655c310 | 4865 | \f |
4b4b2e58 NS |
4866 | /* Return the binding for NAME in NS. If NS is NULL, look in |
4867 | global_namespace. */ | |
4868 | ||
a5e6b29b | 4869 | tree |
06aa5490 | 4870 | get_namespace_binding (tree ns, tree name) |
a5e6b29b | 4871 | { |
b655c310 | 4872 | bool subtime = timevar_cond_start (TV_NAME_LOOKUP); |
4b4b2e58 NS |
4873 | if (!ns) |
4874 | ns = global_namespace; | |
3c9cca88 NS |
4875 | gcc_checking_assert (!DECL_NAMESPACE_ALIAS (ns)); |
4876 | tree ret = find_namespace_value (ns, name); | |
b655c310 | 4877 | timevar_cond_stop (TV_NAME_LOOKUP, subtime); |
3c9cca88 | 4878 | return ret; |
5a167978 GDR |
4879 | } |
4880 | ||
87e3d7cf NS |
4881 | /* Push internal DECL into the global namespace. Does not do the |
4882 | full overload fn handling and does not add it to the list of things | |
4883 | in the namespace. */ | |
1e003829 | 4884 | |
b655c310 | 4885 | void |
87e3d7cf | 4886 | set_global_binding (tree decl) |
1e003829 | 4887 | { |
b655c310 | 4888 | bool subtime = timevar_cond_start (TV_NAME_LOOKUP); |
4b4b2e58 | 4889 | |
87e3d7cf | 4890 | tree *slot = find_namespace_slot (global_namespace, DECL_NAME (decl), true); |
3c9cca88 | 4891 | |
a6a5091a NS |
4892 | if (*slot) |
4893 | /* The user's placed something in the implementor's namespace. */ | |
4894 | diagnose_name_conflict (decl, MAYBE_STAT_DECL (*slot)); | |
4895 | ||
4896 | /* Force the binding, so compiler internals continue to work. */ | |
4897 | *slot = decl; | |
4b4b2e58 | 4898 | |
b655c310 | 4899 | timevar_cond_stop (TV_NAME_LOOKUP, subtime); |
1e003829 JM |
4900 | } |
4901 | ||
b655c310 NS |
4902 | /* Set the context of a declaration to scope. Complain if we are not |
4903 | outside scope. */ | |
5a167978 | 4904 | |
b655c310 NS |
4905 | void |
4906 | set_decl_namespace (tree decl, tree scope, bool friendp) | |
5a167978 | 4907 | { |
b655c310 NS |
4908 | /* Get rid of namespace aliases. */ |
4909 | scope = ORIGINAL_NAMESPACE (scope); | |
af92ab36 | 4910 | |
b655c310 | 4911 | /* It is ok for friends to be qualified in parallel space. */ |
322763f5 | 4912 | if (!friendp && !is_nested_namespace (current_namespace, scope)) |
b655c310 NS |
4913 | error ("declaration of %qD not in a namespace surrounding %qD", |
4914 | decl, scope); | |
4915 | DECL_CONTEXT (decl) = FROB_CONTEXT (scope); | |
af92ab36 | 4916 | |
5ec046c0 NS |
4917 | /* See whether this has been declared in the namespace or inline |
4918 | children. */ | |
4919 | tree old = NULL_TREE; | |
4920 | { | |
4921 | name_lookup lookup (DECL_NAME (decl), LOOKUP_HIDDEN); | |
4922 | if (!lookup.search_qualified (scope, /*usings=*/false)) | |
4923 | /* No old declaration at all. */ | |
4924 | goto not_found; | |
4925 | old = lookup.value; | |
4926 | } | |
c8094d83 | 4927 | |
b655c310 NS |
4928 | /* If it's a TREE_LIST, the result of the lookup was ambiguous. */ |
4929 | if (TREE_CODE (old) == TREE_LIST) | |
5a167978 | 4930 | { |
5ec046c0 NS |
4931 | ambiguous: |
4932 | DECL_CONTEXT (decl) = FROB_CONTEXT (scope); | |
b655c310 NS |
4933 | error ("reference to %qD is ambiguous", decl); |
4934 | print_candidates (old); | |
4935 | return; | |
4936 | } | |
5ec046c0 NS |
4937 | |
4938 | if (!DECL_DECLARES_FUNCTION_P (decl)) | |
b655c310 | 4939 | { |
b655c310 NS |
4940 | /* Don't compare non-function decls with decls_match here, since |
4941 | it can't check for the correct constness at this | |
5ec046c0 NS |
4942 | point. pushdecl will find those errors later. */ |
4943 | ||
4944 | /* We might have found it in an inline namespace child of SCOPE. */ | |
4945 | if (TREE_CODE (decl) == TREE_CODE (old)) | |
4946 | DECL_CONTEXT (decl) = DECL_CONTEXT (old); | |
4947 | ||
4948 | found: | |
4949 | /* Writing "N::i" to declare something directly in "N" is invalid. */ | |
4950 | if (CP_DECL_CONTEXT (decl) == current_namespace | |
4951 | && at_namespace_scope_p ()) | |
4952 | error ("explicit qualification in declaration of %qD", decl); | |
b655c310 NS |
4953 | return; |
4954 | } | |
5ec046c0 | 4955 | |
b655c310 | 4956 | /* Since decl is a function, old should contain a function decl. */ |
e1cad930 | 4957 | if (!OVL_P (old)) |
5ec046c0 NS |
4958 | goto not_found; |
4959 | ||
b655c310 NS |
4960 | /* We handle these in check_explicit_instantiation_namespace. */ |
4961 | if (processing_explicit_instantiation) | |
4962 | return; | |
4963 | if (processing_template_decl || processing_specialization) | |
4964 | /* We have not yet called push_template_decl to turn a | |
4965 | FUNCTION_DECL into a TEMPLATE_DECL, so the declarations won't | |
4966 | match. But, we'll check later, when we construct the | |
4967 | template. */ | |
4968 | return; | |
4969 | /* Instantiations or specializations of templates may be declared as | |
4970 | friends in any namespace. */ | |
4971 | if (friendp && DECL_USE_TEMPLATE (decl)) | |
4972 | return; | |
5ec046c0 NS |
4973 | |
4974 | tree found; | |
4975 | found = NULL_TREE; | |
4976 | ||
4977 | for (lkp_iterator iter (old); iter; ++iter) | |
b655c310 | 4978 | { |
5ec046c0 NS |
4979 | if (iter.using_p ()) |
4980 | continue; | |
87c976ae | 4981 | |
5ec046c0 NS |
4982 | tree ofn = *iter; |
4983 | ||
4984 | /* Adjust DECL_CONTEXT first so decls_match will return true | |
4985 | if DECL will match a declaration in an inline namespace. */ | |
4986 | DECL_CONTEXT (decl) = DECL_CONTEXT (ofn); | |
4987 | if (decls_match (decl, ofn)) | |
b655c310 | 4988 | { |
5ec046c0 | 4989 | if (found) |
b655c310 | 4990 | { |
5ec046c0 NS |
4991 | /* We found more than one matching declaration. */ |
4992 | DECL_CONTEXT (decl) = FROB_CONTEXT (scope); | |
4993 | goto ambiguous; | |
b655c310 | 4994 | } |
5ec046c0 | 4995 | found = ofn; |
5a167978 GDR |
4996 | } |
4997 | } | |
5ec046c0 NS |
4998 | |
4999 | if (found) | |
5a167978 | 5000 | { |
5ec046c0 NS |
5001 | if (DECL_HIDDEN_FRIEND_P (found)) |
5002 | { | |
5003 | pedwarn (DECL_SOURCE_LOCATION (decl), 0, | |
5004 | "%qD has not been declared within %qD", decl, scope); | |
5005 | inform (DECL_SOURCE_LOCATION (found), | |
5006 | "only here as a %<friend%>"); | |
5007 | } | |
5008 | DECL_CONTEXT (decl) = DECL_CONTEXT (found); | |
5009 | goto found; | |
5a167978 | 5010 | } |
b655c310 | 5011 | |
5ec046c0 | 5012 | not_found: |
b655c310 NS |
5013 | /* It didn't work, go back to the explicit scope. */ |
5014 | DECL_CONTEXT (decl) = FROB_CONTEXT (scope); | |
b655c310 | 5015 | error ("%qD should have been declared inside %qD", decl, scope); |
5a167978 GDR |
5016 | } |
5017 | ||
b655c310 | 5018 | /* Return the namespace where the current declaration is declared. */ |
00e8de68 GDR |
5019 | |
5020 | tree | |
b655c310 | 5021 | current_decl_namespace (void) |
00e8de68 | 5022 | { |
b655c310 NS |
5023 | tree result; |
5024 | /* If we have been pushed into a different namespace, use it. */ | |
5025 | if (!vec_safe_is_empty (decl_namespace_list)) | |
5026 | return decl_namespace_list->last (); | |
00e8de68 | 5027 | |
b655c310 NS |
5028 | if (current_class_type) |
5029 | result = decl_namespace_context (current_class_type); | |
5030 | else if (current_function_decl) | |
5031 | result = decl_namespace_context (current_function_decl); | |
5032 | else | |
5033 | result = current_namespace; | |
5034 | return result; | |
00e8de68 GDR |
5035 | } |
5036 | ||
b655c310 NS |
5037 | /* Process any ATTRIBUTES on a namespace definition. Returns true if |
5038 | attribute visibility is seen. */ | |
00e8de68 | 5039 | |
b655c310 NS |
5040 | bool |
5041 | handle_namespace_attrs (tree ns, tree attributes) | |
00e8de68 | 5042 | { |
b655c310 NS |
5043 | tree d; |
5044 | bool saw_vis = false; | |
5045 | ||
93e544c1 JJ |
5046 | if (attributes == error_mark_node) |
5047 | return false; | |
5048 | ||
b655c310 | 5049 | for (d = attributes; d; d = TREE_CHAIN (d)) |
af79925b | 5050 | { |
b655c310 NS |
5051 | tree name = get_attribute_name (d); |
5052 | tree args = TREE_VALUE (d); | |
5053 | ||
5054 | if (is_attribute_p ("visibility", name)) | |
5055 | { | |
5056 | /* attribute visibility is a property of the syntactic block | |
5057 | rather than the namespace as a whole, so we don't touch the | |
5058 | NAMESPACE_DECL at all. */ | |
5059 | tree x = args ? TREE_VALUE (args) : NULL_TREE; | |
5060 | if (x == NULL_TREE || TREE_CODE (x) != STRING_CST || TREE_CHAIN (args)) | |
5061 | { | |
5062 | warning (OPT_Wattributes, | |
5063 | "%qD attribute requires a single NTBS argument", | |
5064 | name); | |
5065 | continue; | |
5066 | } | |
5067 | ||
5068 | if (!TREE_PUBLIC (ns)) | |
5069 | warning (OPT_Wattributes, | |
5070 | "%qD attribute is meaningless since members of the " | |
5071 | "anonymous namespace get local symbols", name); | |
5072 | ||
5073 | push_visibility (TREE_STRING_POINTER (x), 1); | |
5074 | saw_vis = true; | |
5075 | } | |
5076 | else if (is_attribute_p ("abi_tag", name)) | |
5077 | { | |
44e00a7a | 5078 | if (!DECL_NAME (ns)) |
b655c310 | 5079 | { |
44e00a7a | 5080 | warning (OPT_Wattributes, "ignoring %qD attribute on anonymous " |
b655c310 NS |
5081 | "namespace", name); |
5082 | continue; | |
5083 | } | |
44e00a7a | 5084 | if (!DECL_NAMESPACE_INLINE_P (ns)) |
b655c310 | 5085 | { |
44e00a7a | 5086 | warning (OPT_Wattributes, "ignoring %qD attribute on non-inline " |
b655c310 NS |
5087 | "namespace", name); |
5088 | continue; | |
5089 | } | |
5090 | if (!args) | |
5091 | { | |
5092 | tree dn = DECL_NAME (ns); | |
5093 | args = build_string (IDENTIFIER_LENGTH (dn) + 1, | |
5094 | IDENTIFIER_POINTER (dn)); | |
5095 | TREE_TYPE (args) = char_array_type_node; | |
5096 | args = fix_string_type (args); | |
5097 | args = build_tree_list (NULL_TREE, args); | |
5098 | } | |
5099 | if (check_abi_tag_args (args, name)) | |
5100 | DECL_ATTRIBUTES (ns) = tree_cons (name, args, | |
5101 | DECL_ATTRIBUTES (ns)); | |
5102 | } | |
5103 | else | |
5104 | { | |
5105 | warning (OPT_Wattributes, "%qD attribute directive ignored", | |
5106 | name); | |
5107 | continue; | |
5108 | } | |
af79925b | 5109 | } |
bd3d082e | 5110 | |
b655c310 NS |
5111 | return saw_vis; |
5112 | } | |
e1cad930 | 5113 | |
b655c310 | 5114 | /* Temporarily set the namespace for the current declaration. */ |
bd3d082e | 5115 | |
b655c310 NS |
5116 | void |
5117 | push_decl_namespace (tree decl) | |
bd3d082e | 5118 | { |
b655c310 NS |
5119 | if (TREE_CODE (decl) != NAMESPACE_DECL) |
5120 | decl = decl_namespace_context (decl); | |
5121 | vec_safe_push (decl_namespace_list, ORIGINAL_NAMESPACE (decl)); | |
00e8de68 GDR |
5122 | } |
5123 | ||
b655c310 | 5124 | /* [namespace.memdef]/2 */ |
d63d5d0c | 5125 | |
b655c310 NS |
5126 | void |
5127 | pop_decl_namespace (void) | |
d63d5d0c | 5128 | { |
b655c310 NS |
5129 | decl_namespace_list->pop (); |
5130 | } | |
d63d5d0c | 5131 | |
b655c310 | 5132 | /* Process a namespace-alias declaration. */ |
501c95ff NF |
5133 | |
5134 | void | |
b655c310 | 5135 | do_namespace_alias (tree alias, tree name_space) |
501c95ff | 5136 | { |
b655c310 NS |
5137 | if (name_space == error_mark_node) |
5138 | return; | |
501c95ff | 5139 | |
b655c310 | 5140 | gcc_assert (TREE_CODE (name_space) == NAMESPACE_DECL); |
501c95ff | 5141 | |
b655c310 | 5142 | name_space = ORIGINAL_NAMESPACE (name_space); |
501c95ff | 5143 | |
b655c310 NS |
5144 | /* Build the alias. */ |
5145 | alias = build_lang_decl (NAMESPACE_DECL, alias, void_type_node); | |
5146 | DECL_NAMESPACE_ALIAS (alias) = name_space; | |
5147 | DECL_EXTERNAL (alias) = 1; | |
5148 | DECL_CONTEXT (alias) = FROB_CONTEXT (current_scope ()); | |
5149 | pushdecl (alias); | |
501c95ff | 5150 | |
b655c310 NS |
5151 | /* Emit debug info for namespace alias. */ |
5152 | if (!building_stmt_list_p ()) | |
5153 | (*debug_hooks->early_global_decl) (alias); | |
5154 | } | |
501c95ff | 5155 | |
b655c310 NS |
5156 | /* Like pushdecl, only it places X in the current namespace, |
5157 | if appropriate. */ | |
501c95ff | 5158 | |
b655c310 NS |
5159 | tree |
5160 | pushdecl_namespace_level (tree x, bool is_friend) | |
5161 | { | |
5162 | cp_binding_level *b = current_binding_level; | |
5163 | tree t; | |
501c95ff | 5164 | |
b655c310 | 5165 | bool subtime = timevar_cond_start (TV_NAME_LOOKUP); |
5256a7f5 | 5166 | t = do_pushdecl_with_scope |
d16d5eac | 5167 | (x, NAMESPACE_LEVEL (current_namespace), is_friend); |
501c95ff | 5168 | |
b655c310 NS |
5169 | /* Now, the type_shadowed stack may screw us. Munge it so it does |
5170 | what we want. */ | |
5171 | if (TREE_CODE (t) == TYPE_DECL) | |
52ed68f7 | 5172 | { |
b655c310 NS |
5173 | tree name = DECL_NAME (t); |
5174 | tree newval; | |
5175 | tree *ptr = (tree *)0; | |
5176 | for (; !global_scope_p (b); b = b->level_chain) | |
52ed68f7 | 5177 | { |
b655c310 NS |
5178 | tree shadowed = b->type_shadowed; |
5179 | for (; shadowed; shadowed = TREE_CHAIN (shadowed)) | |
5180 | if (TREE_PURPOSE (shadowed) == name) | |
5181 | { | |
5182 | ptr = &TREE_VALUE (shadowed); | |
5183 | /* Can't break out of the loop here because sometimes | |
5184 | a binding level will have duplicate bindings for | |
5185 | PT names. It's gross, but I haven't time to fix it. */ | |
5186 | } | |
5187 | } | |
5188 | newval = TREE_TYPE (t); | |
5189 | if (ptr == (tree *)0) | |
5190 | { | |
5191 | /* @@ This shouldn't be needed. My test case "zstring.cc" trips | |
5192 | up here if this is changed to an assertion. --KR */ | |
5193 | SET_IDENTIFIER_TYPE_VALUE (name, t); | |
5194 | } | |
5195 | else | |
5196 | { | |
5197 | *ptr = newval; | |
52ed68f7 | 5198 | } |
52ed68f7 | 5199 | } |
b655c310 NS |
5200 | timevar_cond_stop (TV_NAME_LOOKUP, subtime); |
5201 | return t; | |
501c95ff NF |
5202 | } |
5203 | ||
9d029ddf | 5204 | /* Process a using-declaration appearing in namespace scope. */ |
ebed7175 | 5205 | |
b655c310 | 5206 | void |
9d029ddf | 5207 | finish_namespace_using_decl (tree decl, tree scope, tree name) |
ebed7175 | 5208 | { |
b655c310 | 5209 | tree orig_decl = decl; |
fcb2cdfc | 5210 | |
3c9cca88 NS |
5211 | gcc_checking_assert (current_binding_level->kind == sk_namespace |
5212 | && !processing_template_decl); | |
b655c310 NS |
5213 | decl = validate_nonmember_using_decl (decl, scope, name); |
5214 | if (decl == NULL_TREE) | |
5215 | return; | |
ebed7175 | 5216 | |
3c9cca88 NS |
5217 | tree *slot = find_namespace_slot (current_namespace, name, true); |
5218 | tree val = slot ? MAYBE_STAT_DECL (*slot) : NULL_TREE; | |
5219 | tree type = slot ? MAYBE_STAT_TYPE (*slot) : NULL_TREE; | |
5220 | do_nonmember_using_decl (scope, name, &val, &type); | |
5221 | if (STAT_HACK_P (*slot)) | |
5222 | { | |
5223 | STAT_DECL (*slot) = val; | |
5224 | STAT_TYPE (*slot) = type; | |
5225 | } | |
5226 | else if (type) | |
5227 | *slot = stat_hack (val, type); | |
5228 | else | |
5229 | *slot = val; | |
b655c310 NS |
5230 | |
5231 | /* Emit debug info. */ | |
3c9cca88 | 5232 | cp_emit_debug_info_for_using (orig_decl, current_namespace); |
9d029ddf | 5233 | } |
b655c310 | 5234 | |
3c9cca88 | 5235 | /* Process a using-declaration at function scope. */ |
9d029ddf NS |
5236 | |
5237 | void | |
5238 | finish_local_using_decl (tree decl, tree scope, tree name) | |
5239 | { | |
5240 | tree orig_decl = decl; | |
5241 | ||
5242 | gcc_checking_assert (current_binding_level->kind != sk_class | |
5243 | && current_binding_level->kind != sk_namespace); | |
5244 | decl = validate_nonmember_using_decl (decl, scope, name); | |
5245 | if (decl == NULL_TREE) | |
5246 | return; | |
5247 | ||
e1cad930 | 5248 | add_decl_expr (decl); |
9d029ddf NS |
5249 | |
5250 | cxx_binding *binding = find_local_binding (current_binding_level, name); | |
5251 | tree value = binding ? binding->value : NULL_TREE; | |
5252 | tree type = binding ? binding->type : NULL_TREE; | |
5253 | ||
5254 | do_nonmember_using_decl (scope, name, &value, &type); | |
5255 | ||
5256 | if (!value) | |
5257 | ; | |
5258 | else if (binding && value == binding->value) | |
5259 | ; | |
5260 | else if (binding && binding->value && TREE_CODE (value) == OVERLOAD) | |
5261 | { | |
5262 | update_local_overload (IDENTIFIER_BINDING (name), value); | |
5263 | IDENTIFIER_BINDING (name)->value = value; | |
5264 | } | |
5265 | else | |
5266 | /* Install the new binding. */ | |
5267 | push_local_binding (name, value, true); | |
5268 | ||
5269 | if (!type) | |
5270 | ; | |
5271 | else if (binding && type == binding->type) | |
5272 | ; | |
5273 | else | |
5274 | { | |
5275 | push_local_binding (name, type, true); | |
5276 | set_identifier_type_value (name, type); | |
5277 | } | |
5278 | ||
5279 | /* Emit debug info. */ | |
5280 | if (!processing_template_decl) | |
5281 | cp_emit_debug_info_for_using (orig_decl, current_scope ()); | |
ebed7175 DM |
5282 | } |
5283 | ||
b655c310 NS |
5284 | /* Return the declarations that are members of the namespace NS. */ |
5285 | ||
5286 | tree | |
5287 | cp_namespace_decls (tree ns) | |
5288 | { | |
5289 | return NAMESPACE_LEVEL (ns)->names; | |
52ed68f7 DM |
5290 | } |
5291 | ||
b655c310 | 5292 | /* Combine prefer_type and namespaces_only into flags. */ |
9ca6556e | 5293 | |
b655c310 NS |
5294 | static int |
5295 | lookup_flags (int prefer_type, int namespaces_only) | |
5296 | { | |
5297 | if (namespaces_only) | |
5298 | return LOOKUP_PREFER_NAMESPACES; | |
5299 | if (prefer_type > 1) | |
5300 | return LOOKUP_PREFER_TYPES; | |
5301 | if (prefer_type > 0) | |
5302 | return LOOKUP_PREFER_BOTH; | |
5303 | return 0; | |
5304 | } | |
9ca6556e | 5305 | |
b655c310 NS |
5306 | /* Given a lookup that returned VAL, use FLAGS to decide if we want to |
5307 | ignore it or not. Subroutine of lookup_name_real and | |
5308 | lookup_type_scope. */ | |
172a4594 DS |
5309 | |
5310 | static bool | |
b655c310 | 5311 | qualify_lookup (tree val, int flags) |
172a4594 | 5312 | { |
b655c310 | 5313 | if (val == NULL_TREE) |
172a4594 | 5314 | return false; |
b655c310 NS |
5315 | if ((flags & LOOKUP_PREFER_NAMESPACES) && TREE_CODE (val) == NAMESPACE_DECL) |
5316 | return true; | |
5317 | if (flags & LOOKUP_PREFER_TYPES) | |
5318 | { | |
5319 | tree target_val = strip_using_decl (val); | |
5320 | if (TREE_CODE (target_val) == TYPE_DECL | |
5321 | || TREE_CODE (target_val) == TEMPLATE_DECL) | |
5322 | return true; | |
5323 | } | |
5324 | if (flags & (LOOKUP_PREFER_NAMESPACES | LOOKUP_PREFER_TYPES)) | |
74788b80 | 5325 | return false; |
b655c310 | 5326 | /* Look through lambda things that we shouldn't be able to see. */ |
5c263e84 | 5327 | if (!(flags & LOOKUP_HIDDEN) && is_lambda_ignored_entity (val)) |
b655c310 NS |
5328 | return false; |
5329 | return true; | |
5330 | } | |
74788b80 | 5331 | |
cb731872 DM |
5332 | /* Is there a "using namespace std;" directive within USINGS? */ |
5333 | ||
5334 | static bool | |
5335 | using_directives_contain_std_p (vec<tree, va_gc> *usings) | |
5336 | { | |
5337 | if (!usings) | |
5338 | return false; | |
5339 | ||
5340 | for (unsigned ix = usings->length (); ix--;) | |
5341 | if ((*usings)[ix] == std_node) | |
5342 | return true; | |
5343 | ||
5344 | return false; | |
5345 | } | |
5346 | ||
5347 | /* Is there a "using namespace std;" directive within the current | |
5348 | namespace (or its ancestors)? | |
5349 | Compare with name_lookup::search_unqualified. */ | |
5350 | ||
5351 | static bool | |
5352 | has_using_namespace_std_directive_p () | |
5353 | { | |
5354 | /* Look at local using-directives. */ | |
5355 | for (cp_binding_level *level = current_binding_level; | |
5356 | level->kind != sk_namespace; | |
5357 | level = level->level_chain) | |
5358 | if (using_directives_contain_std_p (level->using_directives)) | |
5359 | return true; | |
5360 | ||
5361 | /* Look at this namespace and its ancestors. */ | |
5362 | for (tree scope = current_namespace; scope; scope = CP_DECL_CONTEXT (scope)) | |
5363 | { | |
5364 | if (using_directives_contain_std_p (DECL_NAMESPACE_USING (scope))) | |
5365 | return true; | |
5366 | ||
5367 | if (scope == global_namespace) | |
5368 | break; | |
5369 | } | |
5370 | ||
5371 | return false; | |
5372 | } | |
5373 | ||
b655c310 NS |
5374 | /* Suggest alternatives for NAME, an IDENTIFIER_NODE for which name |
5375 | lookup failed. Search through all available namespaces and print out | |
5376 | possible candidates. If no exact matches are found, and | |
5377 | SUGGEST_MISSPELLINGS is true, then also look for near-matches and | |
5378 | suggest the best near-match, if there is one. */ | |
90ea9897 | 5379 | |
b655c310 NS |
5380 | void |
5381 | suggest_alternatives_for (location_t location, tree name, | |
5382 | bool suggest_misspellings) | |
90ea9897 | 5383 | { |
b655c310 | 5384 | vec<tree> candidates = vNULL; |
c957e9c0 NS |
5385 | vec<tree> worklist = vNULL; |
5386 | unsigned limit = PARAM_VALUE (CXX_MAX_NAMESPACES_FOR_DIAGNOSTIC_HELP); | |
5387 | bool limited = false; | |
5388 | ||
5389 | /* Breadth-first search of namespaces. Up to limit namespaces | |
5390 | searched (limit zero == unlimited). */ | |
5391 | worklist.safe_push (global_namespace); | |
5392 | for (unsigned ix = 0; ix != worklist.length (); ix++) | |
b655c310 | 5393 | { |
c957e9c0 | 5394 | tree ns = worklist[ix]; |
25396db9 | 5395 | name_lookup lookup (name); |
90ea9897 | 5396 | |
25396db9 NS |
5397 | if (lookup.search_qualified (ns, false)) |
5398 | candidates.safe_push (lookup.value); | |
00e8de68 | 5399 | |
c957e9c0 | 5400 | if (!limited) |
00e8de68 | 5401 | { |
c957e9c0 NS |
5402 | /* Look for child namespaces. We have to do this |
5403 | indirectly because they are chained in reverse order, | |
5404 | which is confusing to the user. */ | |
5405 | vec<tree> children = vNULL; | |
5406 | ||
5407 | for (tree decl = NAMESPACE_LEVEL (ns)->names; | |
5408 | decl; decl = TREE_CHAIN (decl)) | |
5409 | if (TREE_CODE (decl) == NAMESPACE_DECL | |
25396db9 NS |
5410 | && !DECL_NAMESPACE_ALIAS (decl) |
5411 | && !DECL_NAMESPACE_INLINE_P (decl)) | |
c957e9c0 NS |
5412 | children.safe_push (decl); |
5413 | ||
5414 | while (!limited && !children.is_empty ()) | |
b655c310 | 5415 | { |
c957e9c0 NS |
5416 | if (worklist.length () == limit) |
5417 | { | |
5418 | /* Unconditionally warn that the search was truncated. */ | |
5419 | inform (location, | |
5420 | "maximum limit of %d namespaces searched for %qE", | |
5421 | limit, name); | |
5422 | limited = true; | |
5423 | } | |
5424 | else | |
5425 | worklist.safe_push (children.pop ()); | |
b655c310 | 5426 | } |
c957e9c0 | 5427 | children.release (); |
b655c310 | 5428 | } |
b655c310 | 5429 | } |
c957e9c0 | 5430 | worklist.release (); |
c8094d83 | 5431 | |
c957e9c0 NS |
5432 | if (candidates.length ()) |
5433 | { | |
5434 | inform_n (location, candidates.length (), | |
5435 | "suggested alternative:", | |
5436 | "suggested alternatives:"); | |
5437 | for (unsigned ix = 0; ix != candidates.length (); ix++) | |
5438 | { | |
5439 | tree val = candidates[ix]; | |
c8094d83 | 5440 | |
c957e9c0 NS |
5441 | inform (location_of (val), " %qE", val); |
5442 | } | |
5443 | candidates.release (); | |
cb731872 | 5444 | return; |
c957e9c0 | 5445 | } |
cb731872 DM |
5446 | |
5447 | /* No candidates were found in the available namespaces. */ | |
5448 | ||
5449 | /* If there's a "using namespace std;" active, and this | |
5450 | is one of the most common "std::" names, then it's probably a | |
5451 | missing #include. */ | |
5452 | if (has_using_namespace_std_directive_p ()) | |
5453 | if (maybe_suggest_missing_std_header (location, name)) | |
5454 | return; | |
5455 | ||
5456 | /* Otherwise, consider misspellings. */ | |
5457 | if (!suggest_misspellings) | |
5458 | return; | |
5459 | if (name_hint hint = lookup_name_fuzzy (name, FUZZY_LOOKUP_NAME, | |
5460 | location)) | |
c957e9c0 NS |
5461 | { |
5462 | /* Show a spelling correction. */ | |
5463 | gcc_rich_location richloc (location); | |
00e8de68 | 5464 | |
6c7a259b DM |
5465 | richloc.add_fixit_replace (hint.suggestion ()); |
5466 | inform (&richloc, "suggested alternative: %qs", hint.suggestion ()); | |
c957e9c0 | 5467 | } |
b655c310 | 5468 | } |
00e8de68 | 5469 | |
e1c7971b DM |
5470 | /* A well-known name within the C++ standard library, returned by |
5471 | get_std_name_hint. */ | |
5472 | ||
5473 | struct std_name_hint | |
5474 | { | |
5475 | /* A name within "std::". */ | |
5476 | const char *name; | |
5477 | ||
5478 | /* The header name defining it within the C++ Standard Library | |
5479 | (with '<' and '>'). */ | |
5480 | const char *header; | |
5481 | ||
5482 | /* The dialect of C++ in which this was added. */ | |
5483 | enum cxx_dialect min_dialect; | |
5484 | }; | |
5485 | ||
b655c310 NS |
5486 | /* Subroutine of maybe_suggest_missing_header for handling unrecognized names |
5487 | for some of the most common names within "std::". | |
e1c7971b | 5488 | Given non-NULL NAME, return the std_name_hint for it, or NULL. */ |
00e8de68 | 5489 | |
e1c7971b | 5490 | static const std_name_hint * |
b655c310 NS |
5491 | get_std_name_hint (const char *name) |
5492 | { | |
b655c310 | 5493 | static const std_name_hint hints[] = { |
e1c7971b DM |
5494 | /* <any>. */ |
5495 | {"any", "<any>", cxx17}, | |
5496 | {"any_cast", "<any>", cxx17}, | |
5497 | {"make_any", "<any>", cxx17}, | |
b655c310 | 5498 | /* <array>. */ |
e1c7971b DM |
5499 | {"array", "<array>", cxx11}, |
5500 | /* <atomic>. */ | |
5501 | {"atomic", "<atomic>", cxx11}, | |
5502 | {"atomic_flag", "<atomic>", cxx11}, | |
5503 | /* <bitset>. */ | |
5504 | {"bitset", "<bitset>", cxx11}, | |
b3e862e0 | 5505 | /* <complex>. */ |
e1c7971b DM |
5506 | {"complex", "<complex>", cxx98}, |
5507 | {"complex_literals", "<complex>", cxx98}, | |
5508 | /* <condition_variable>. */ | |
5509 | {"condition_variable", "<condition_variable>", cxx11}, | |
5510 | {"condition_variable_any", "<condition_variable>", cxx11}, | |
b655c310 | 5511 | /* <deque>. */ |
e1c7971b | 5512 | {"deque", "<deque>", cxx98}, |
b655c310 | 5513 | /* <forward_list>. */ |
e1c7971b | 5514 | {"forward_list", "<forward_list>", cxx11}, |
b655c310 | 5515 | /* <fstream>. */ |
e1c7971b DM |
5516 | {"basic_filebuf", "<fstream>", cxx98}, |
5517 | {"basic_ifstream", "<fstream>", cxx98}, | |
5518 | {"basic_ofstream", "<fstream>", cxx98}, | |
5519 | {"basic_fstream", "<fstream>", cxx98}, | |
5520 | {"fstream", "<fstream>", cxx98}, | |
5521 | {"ifstream", "<fstream>", cxx98}, | |
5522 | {"ofstream", "<fstream>", cxx98}, | |
5523 | /* <functional>. */ | |
5524 | {"bind", "<functional>", cxx11}, | |
5525 | {"function", "<functional>", cxx11}, | |
5526 | {"hash", "<functional>", cxx11}, | |
5527 | {"mem_fn", "<functional>", cxx11}, | |
5528 | /* <future>. */ | |
5529 | {"async", "<future>", cxx11}, | |
5530 | {"future", "<future>", cxx11}, | |
5531 | {"packaged_task", "<future>", cxx11}, | |
5532 | {"promise", "<future>", cxx11}, | |
b655c310 | 5533 | /* <iostream>. */ |
e1c7971b DM |
5534 | {"cin", "<iostream>", cxx98}, |
5535 | {"cout", "<iostream>", cxx98}, | |
5536 | {"cerr", "<iostream>", cxx98}, | |
5537 | {"clog", "<iostream>", cxx98}, | |
5538 | {"wcin", "<iostream>", cxx98}, | |
5539 | {"wcout", "<iostream>", cxx98}, | |
5540 | {"wclog", "<iostream>", cxx98}, | |
5541 | /* <istream>. */ | |
5542 | {"istream", "<istream>", cxx98}, | |
5543 | /* <iterator>. */ | |
5544 | {"advance", "<iterator>", cxx98}, | |
5545 | {"back_inserter", "<iterator>", cxx98}, | |
5546 | {"begin", "<iterator>", cxx11}, | |
5547 | {"distance", "<iterator>", cxx98}, | |
5548 | {"end", "<iterator>", cxx11}, | |
5549 | {"front_inserter", "<iterator>", cxx98}, | |
5550 | {"inserter", "<iterator>", cxx98}, | |
5551 | {"istream_iterator", "<iterator>", cxx98}, | |
5552 | {"istreambuf_iterator", "<iterator>", cxx98}, | |
5553 | {"iterator_traits", "<iterator>", cxx98}, | |
5554 | {"move_iterator", "<iterator>", cxx11}, | |
5555 | {"next", "<iterator>", cxx11}, | |
5556 | {"ostream_iterator", "<iterator>", cxx98}, | |
5557 | {"ostreambuf_iterator", "<iterator>", cxx98}, | |
5558 | {"prev", "<iterator>", cxx11}, | |
5559 | {"reverse_iterator", "<iterator>", cxx98}, | |
5560 | /* <ostream>. */ | |
5561 | {"ostream", "<ostream>", cxx98}, | |
b655c310 | 5562 | /* <list>. */ |
e1c7971b | 5563 | {"list", "<list>", cxx98}, |
b655c310 | 5564 | /* <map>. */ |
e1c7971b DM |
5565 | {"map", "<map>", cxx98}, |
5566 | {"multimap", "<map>", cxx98}, | |
62e98ef1 | 5567 | /* <memory>. */ |
e1c7971b DM |
5568 | {"make_shared", "<memory>", cxx11}, |
5569 | {"make_unique", "<memory>", cxx11}, | |
5570 | {"shared_ptr", "<memory>", cxx11}, | |
5571 | {"unique_ptr", "<memory>", cxx11}, | |
5572 | {"weak_ptr", "<memory>", cxx11}, | |
5573 | /* <mutex>. */ | |
5574 | {"mutex", "<mutex>", cxx11}, | |
5575 | {"timed_mutex", "<mutex>", cxx11}, | |
5576 | {"recursive_mutex", "<mutex>", cxx11}, | |
5577 | {"recursive_timed_mutex", "<mutex>", cxx11}, | |
5578 | {"once_flag", "<mutex>", cxx11}, | |
5579 | {"call_once,", "<mutex>", cxx11}, | |
5580 | {"lock", "<mutex>", cxx11}, | |
5581 | {"scoped_lock", "<mutex>", cxx17}, | |
5582 | {"try_lock", "<mutex>", cxx11}, | |
5583 | {"lock_guard", "<mutex>", cxx11}, | |
5584 | {"unique_lock", "<mutex>", cxx11}, | |
5585 | /* <optional>. */ | |
5586 | {"optional", "<optional>", cxx17}, | |
5587 | {"make_optional", "<optional>", cxx17}, | |
b655c310 | 5588 | /* <ostream>. */ |
e1c7971b DM |
5589 | {"ostream", "<ostream>", cxx98}, |
5590 | {"wostream", "<ostream>", cxx98}, | |
5591 | {"ends", "<ostream>", cxx98}, | |
5592 | {"flush", "<ostream>", cxx98}, | |
5593 | {"endl", "<ostream>", cxx98}, | |
5594 | /* <queue>. */ | |
5595 | {"queue", "<queue>", cxx98}, | |
5596 | {"priority_queue", "<queue>", cxx98}, | |
b655c310 | 5597 | /* <set>. */ |
e1c7971b DM |
5598 | {"set", "<set>", cxx98}, |
5599 | {"multiset", "<set>", cxx98}, | |
5600 | /* <shared_mutex>. */ | |
5601 | {"shared_lock", "<shared_mutex>", cxx14}, | |
5602 | {"shared_mutex", "<shared_mutex>", cxx17}, | |
5603 | {"shared_timed_mutex", "<shared_mutex>", cxx14}, | |
b655c310 | 5604 | /* <sstream>. */ |
e1c7971b DM |
5605 | {"basic_stringbuf", "<sstream>", cxx98}, |
5606 | {"basic_istringstream", "<sstream>", cxx98}, | |
5607 | {"basic_ostringstream", "<sstream>", cxx98}, | |
5608 | {"basic_stringstream", "<sstream>", cxx98}, | |
5609 | {"istringstream", "<sstream>", cxx98}, | |
5610 | {"ostringstream", "<sstream>", cxx98}, | |
5611 | {"stringstream", "<sstream>", cxx98}, | |
b655c310 | 5612 | /* <stack>. */ |
e1c7971b | 5613 | {"stack", "<stack>", cxx98}, |
b655c310 | 5614 | /* <string>. */ |
e1c7971b DM |
5615 | {"basic_string", "<string>", cxx98}, |
5616 | {"string", "<string>", cxx98}, | |
5617 | {"wstring", "<string>", cxx98}, | |
5618 | {"u16string", "<string>", cxx11}, | |
5619 | {"u32string", "<string>", cxx11}, | |
5620 | /* <string_view>. */ | |
5621 | {"string_view", "<string_view>", cxx17}, | |
5622 | /* <thread>. */ | |
5623 | {"thread", "<thread>", cxx11}, | |
5624 | /* <tuple>. */ | |
5625 | {"make_tuple", "<tuple>", cxx11}, | |
5626 | {"tuple", "<tuple>", cxx11}, | |
5627 | {"tuple_element", "<tuple>", cxx11}, | |
5628 | {"tuple_size", "<tuple>", cxx11}, | |
b655c310 | 5629 | /* <unordered_map>. */ |
e1c7971b DM |
5630 | {"unordered_map", "<unordered_map>", cxx11}, |
5631 | {"unordered_multimap", "<unordered_map>", cxx11}, | |
b655c310 | 5632 | /* <unordered_set>. */ |
e1c7971b DM |
5633 | {"unordered_set", "<unordered_set>", cxx11}, |
5634 | {"unordered_multiset", "<unordered_set>", cxx11}, | |
62e98ef1 | 5635 | /* <utility>. */ |
e1c7971b DM |
5636 | {"declval", "<utility>", cxx11}, |
5637 | {"forward", "<utility>", cxx11}, | |
5638 | {"make_pair", "<utility>", cxx98}, | |
5639 | {"move", "<utility>", cxx11}, | |
5640 | {"pair", "<utility>", cxx98}, | |
5641 | /* <variant>. */ | |
5642 | {"variant", "<variant>", cxx17}, | |
5643 | {"visit", "<variant>", cxx17}, | |
b655c310 | 5644 | /* <vector>. */ |
e1c7971b | 5645 | {"vector", "<vector>", cxx98}, |
b655c310 NS |
5646 | }; |
5647 | const size_t num_hints = sizeof (hints) / sizeof (hints[0]); | |
5648 | for (size_t i = 0; i < num_hints; i++) | |
5649 | { | |
01512446 | 5650 | if (strcmp (name, hints[i].name) == 0) |
e1c7971b | 5651 | return &hints[i]; |
b655c310 NS |
5652 | } |
5653 | return NULL; | |
5654 | } | |
00e8de68 | 5655 | |
e1c7971b DM |
5656 | /* Describe DIALECT. */ |
5657 | ||
5658 | static const char * | |
5659 | get_cxx_dialect_name (enum cxx_dialect dialect) | |
5660 | { | |
5661 | switch (dialect) | |
5662 | { | |
5663 | default: | |
5664 | gcc_unreachable (); | |
5665 | case cxx98: | |
5666 | return "C++98"; | |
5667 | case cxx11: | |
5668 | return "C++11"; | |
5669 | case cxx14: | |
5670 | return "C++14"; | |
5671 | case cxx17: | |
5672 | return "C++17"; | |
5673 | case cxx2a: | |
5674 | return "C++2a"; | |
5675 | } | |
5676 | } | |
5677 | ||
cb731872 DM |
5678 | /* Suggest pertinent header files for NAME at LOCATION, for common |
5679 | names within the "std" namespace. | |
f661e57e | 5680 | Return true iff a suggestion was offered. */ |
00e8de68 | 5681 | |
f661e57e | 5682 | static bool |
cb731872 | 5683 | maybe_suggest_missing_std_header (location_t location, tree name) |
b655c310 | 5684 | { |
b655c310 | 5685 | gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE); |
c8094d83 | 5686 | |
b655c310 | 5687 | const char *name_str = IDENTIFIER_POINTER (name); |
e1c7971b | 5688 | const std_name_hint *header_hint = get_std_name_hint (name_str); |
f661e57e DM |
5689 | if (!header_hint) |
5690 | return false; | |
5691 | ||
5692 | gcc_rich_location richloc (location); | |
e1c7971b DM |
5693 | if (cxx_dialect >= header_hint->min_dialect) |
5694 | { | |
5695 | const char *header = header_hint->header; | |
5696 | maybe_add_include_fixit (&richloc, header); | |
5697 | inform (&richloc, | |
5698 | "%<std::%s%> is defined in header %qs;" | |
5699 | " did you forget to %<#include %s%>?", | |
5700 | name_str, header, header); | |
5701 | } | |
5702 | else | |
5703 | { | |
5704 | inform (&richloc, | |
5705 | "%<std::%s%> is only available from %s onwards", | |
5706 | name_str, get_cxx_dialect_name (header_hint->min_dialect)); | |
5707 | } | |
f661e57e | 5708 | return true; |
b655c310 | 5709 | } |
c8094d83 | 5710 | |
cb731872 DM |
5711 | /* If SCOPE is the "std" namespace, then suggest pertinent header |
5712 | files for NAME at LOCATION. | |
5713 | Return true iff a suggestion was offered. */ | |
5714 | ||
5715 | static bool | |
5716 | maybe_suggest_missing_header (location_t location, tree name, tree scope) | |
5717 | { | |
5718 | if (scope == NULL_TREE) | |
5719 | return false; | |
5720 | if (TREE_CODE (scope) != NAMESPACE_DECL) | |
5721 | return false; | |
5722 | /* We only offer suggestions for the "std" namespace. */ | |
5723 | if (scope != std_node) | |
5724 | return false; | |
5725 | return maybe_suggest_missing_std_header (location, name); | |
5726 | } | |
5727 | ||
b655c310 NS |
5728 | /* Look for alternatives for NAME, an IDENTIFIER_NODE for which name |
5729 | lookup failed within the explicitly provided SCOPE. Suggest the | |
5730 | the best meaningful candidates (if any) as a fix-it hint. | |
5731 | Return true iff a suggestion was provided. */ | |
c8094d83 | 5732 | |
b655c310 NS |
5733 | bool |
5734 | suggest_alternative_in_explicit_scope (location_t location, tree name, | |
5735 | tree scope) | |
5736 | { | |
7518398d MP |
5737 | /* Something went very wrong; don't suggest anything. */ |
5738 | if (name == error_mark_node) | |
5739 | return false; | |
5740 | ||
b655c310 NS |
5741 | /* Resolve any namespace aliases. */ |
5742 | scope = ORIGINAL_NAMESPACE (scope); | |
b9f673eb | 5743 | |
f661e57e DM |
5744 | if (maybe_suggest_missing_header (location, name, scope)) |
5745 | return true; | |
5746 | ||
b655c310 | 5747 | cp_binding_level *level = NAMESPACE_LEVEL (scope); |
d4d8c232 | 5748 | |
b655c310 NS |
5749 | best_match <tree, const char *> bm (name); |
5750 | consider_binding_level (name, bm, level, false, FUZZY_LOOKUP_NAME); | |
d4d8c232 | 5751 | |
b655c310 NS |
5752 | /* See if we have a good suggesion for the user. */ |
5753 | const char *fuzzy_name = bm.get_best_meaningful_candidate (); | |
5754 | if (fuzzy_name) | |
5755 | { | |
5756 | gcc_rich_location richloc (location); | |
5757 | richloc.add_fixit_replace (fuzzy_name); | |
64a5912c DM |
5758 | inform (&richloc, "suggested alternative: %qs", |
5759 | fuzzy_name); | |
b655c310 NS |
5760 | return true; |
5761 | } | |
d4d8c232 | 5762 | |
b655c310 NS |
5763 | return false; |
5764 | } | |
d4d8c232 | 5765 | |
b655c310 NS |
5766 | /* Look up NAME (an IDENTIFIER_NODE) in SCOPE (either a NAMESPACE_DECL |
5767 | or a class TYPE). | |
00e8de68 | 5768 | |
b655c310 NS |
5769 | If PREFER_TYPE is > 0, we only return TYPE_DECLs or namespaces. |
5770 | If PREFER_TYPE is > 1, we only return TYPE_DECLs. | |
00e8de68 | 5771 | |
b655c310 NS |
5772 | Returns a DECL (or OVERLOAD, or BASELINK) representing the |
5773 | declaration found. If no suitable declaration can be found, | |
5774 | ERROR_MARK_NODE is returned. If COMPLAIN is true and SCOPE is | |
5775 | neither a class-type nor a namespace a diagnostic is issued. */ | |
00e8de68 | 5776 | |
98803730 | 5777 | tree |
b655c310 NS |
5778 | lookup_qualified_name (tree scope, tree name, int prefer_type, bool complain, |
5779 | bool find_hidden) | |
98803730 | 5780 | { |
b655c310 NS |
5781 | tree t = NULL_TREE; |
5782 | ||
5783 | if (TREE_CODE (scope) == NAMESPACE_DECL) | |
5784 | { | |
b655c310 NS |
5785 | int flags = lookup_flags (prefer_type, /*namespaces_only*/false); |
5786 | if (find_hidden) | |
5787 | flags |= LOOKUP_HIDDEN; | |
9dda0ace NS |
5788 | name_lookup lookup (name, flags); |
5789 | ||
5790 | if (qualified_namespace_lookup (scope, &lookup)) | |
5791 | t = lookup.value; | |
b655c310 NS |
5792 | } |
5793 | else if (cxx_dialect != cxx98 && TREE_CODE (scope) == ENUMERAL_TYPE) | |
5794 | t = lookup_enumerator (scope, name); | |
5795 | else if (is_class_type (scope, complain)) | |
5796 | t = lookup_member (scope, name, 2, prefer_type, tf_warning_or_error); | |
5797 | ||
5798 | if (!t) | |
5799 | return error_mark_node; | |
5800 | return t; | |
98803730 MS |
5801 | } |
5802 | ||
b655c310 NS |
5803 | /* [namespace.qual] |
5804 | Accepts the NAME to lookup and its qualifying SCOPE. | |
5805 | Returns the name/type pair found into the cxx_binding *RESULT, | |
5806 | or false on error. */ | |
461c6fce | 5807 | |
b655c310 | 5808 | static bool |
9dda0ace NS |
5809 | qualified_namespace_lookup (tree scope, name_lookup *lookup) |
5810 | { | |
b655c310 | 5811 | timevar_start (TV_NAME_LOOKUP); |
9dda0ace NS |
5812 | query_oracle (lookup->name); |
5813 | bool found = lookup->search_qualified (ORIGINAL_NAMESPACE (scope)); | |
b655c310 | 5814 | timevar_stop (TV_NAME_LOOKUP); |
9dda0ace | 5815 | return found; |
575bfb00 LC |
5816 | } |
5817 | ||
b655c310 NS |
5818 | /* Helper function for lookup_name_fuzzy. |
5819 | Traverse binding level LVL, looking for good name matches for NAME | |
5820 | (and BM). */ | |
5821 | static void | |
5822 | consider_binding_level (tree name, best_match <tree, const char *> &bm, | |
5823 | cp_binding_level *lvl, bool look_within_fields, | |
5824 | enum lookup_name_fuzzy_kind kind) | |
00e8de68 | 5825 | { |
b655c310 NS |
5826 | if (look_within_fields) |
5827 | if (lvl->this_entity && TREE_CODE (lvl->this_entity) == RECORD_TYPE) | |
5828 | { | |
5829 | tree type = lvl->this_entity; | |
5830 | bool want_type_p = (kind == FUZZY_LOOKUP_TYPENAME); | |
5831 | tree best_matching_field | |
5832 | = lookup_member_fuzzy (type, name, want_type_p); | |
5833 | if (best_matching_field) | |
5834 | bm.consider (IDENTIFIER_POINTER (best_matching_field)); | |
5835 | } | |
00e8de68 | 5836 | |
c79144f8 DM |
5837 | /* Only suggest names reserved for the implementation if NAME begins |
5838 | with an underscore. */ | |
5839 | bool consider_implementation_names = (IDENTIFIER_POINTER (name)[0] == '_'); | |
5840 | ||
b655c310 | 5841 | for (tree t = lvl->names; t; t = TREE_CHAIN (t)) |
00e8de68 | 5842 | { |
b655c310 | 5843 | tree d = t; |
00e8de68 | 5844 | |
b655c310 NS |
5845 | /* OVERLOADs or decls from using declaration are wrapped into |
5846 | TREE_LIST. */ | |
5847 | if (TREE_CODE (d) == TREE_LIST) | |
87c976ae | 5848 | d = OVL_FIRST (TREE_VALUE (d)); |
00e8de68 | 5849 | |
b655c310 NS |
5850 | /* Don't use bindings from implicitly declared functions, |
5851 | as they were likely misspellings themselves. */ | |
5852 | if (TREE_TYPE (d) == error_mark_node) | |
5853 | continue; | |
00e8de68 | 5854 | |
b655c310 NS |
5855 | /* Skip anticipated decls of builtin functions. */ |
5856 | if (TREE_CODE (d) == FUNCTION_DECL | |
5857 | && DECL_BUILT_IN (d) | |
5858 | && DECL_ANTICIPATED (d)) | |
5859 | continue; | |
575bfb00 | 5860 | |
66bd3086 DM |
5861 | /* Skip compiler-generated variables (e.g. __for_begin/__for_end |
5862 | within range for). */ | |
5863 | if (TREE_CODE (d) == VAR_DECL | |
5864 | && DECL_ARTIFICIAL (d)) | |
5865 | continue; | |
5866 | ||
c79144f8 DM |
5867 | tree suggestion = DECL_NAME (d); |
5868 | if (!suggestion) | |
5869 | continue; | |
5870 | ||
5871 | const char *suggestion_str = IDENTIFIER_POINTER (suggestion); | |
5872 | ||
5873 | /* Ignore internal names with spaces in them. */ | |
5874 | if (strchr (suggestion_str, ' ')) | |
5875 | continue; | |
5876 | ||
5877 | /* Don't suggest names that are reserved for use by the | |
5878 | implementation, unless NAME began with an underscore. */ | |
5879 | if (name_reserved_for_implementation_p (suggestion_str) | |
5880 | && !consider_implementation_names) | |
5881 | continue; | |
5882 | ||
5883 | bm.consider (suggestion_str); | |
b655c310 | 5884 | } |
575bfb00 LC |
5885 | } |
5886 | ||
01ada121 DM |
5887 | /* Subclass of deferred_diagnostic. Notify the user that the |
5888 | given macro was used before it was defined. | |
5889 | This can be done in the C++ frontend since tokenization happens | |
5890 | upfront. */ | |
5891 | ||
5892 | class macro_use_before_def : public deferred_diagnostic | |
5893 | { | |
5894 | public: | |
b0cc1e53 DM |
5895 | /* Factory function. Return a new macro_use_before_def instance if |
5896 | appropriate, or return NULL. */ | |
5897 | static macro_use_before_def * | |
5898 | maybe_make (location_t use_loc, cpp_hashnode *macro) | |
5899 | { | |
5900 | source_location def_loc = cpp_macro_definition_location (macro); | |
5901 | if (def_loc == UNKNOWN_LOCATION) | |
5902 | return NULL; | |
5903 | ||
5904 | /* We only want to issue a note if the macro was used *before* it was | |
5905 | defined. | |
5906 | We don't want to issue a note for cases where a macro was incorrectly | |
5907 | used, leaving it unexpanded (e.g. by using the wrong argument | |
5908 | count). */ | |
5909 | if (!linemap_location_before_p (line_table, use_loc, def_loc)) | |
5910 | return NULL; | |
5911 | ||
5912 | return new macro_use_before_def (use_loc, macro); | |
5913 | } | |
5914 | ||
5915 | private: | |
01ada121 DM |
5916 | /* Ctor. LOC is the location of the usage. MACRO is the |
5917 | macro that was used. */ | |
5918 | macro_use_before_def (location_t loc, cpp_hashnode *macro) | |
5919 | : deferred_diagnostic (loc), m_macro (macro) | |
5920 | { | |
5921 | gcc_assert (macro); | |
5922 | } | |
5923 | ||
5924 | ~macro_use_before_def () | |
5925 | { | |
5926 | if (is_suppressed_p ()) | |
5927 | return; | |
5928 | ||
b0cc1e53 DM |
5929 | inform (get_location (), "the macro %qs had not yet been defined", |
5930 | (const char *)m_macro->ident.str); | |
5931 | inform (cpp_macro_definition_location (m_macro), | |
5932 | "it was later defined here"); | |
01ada121 DM |
5933 | } |
5934 | ||
5935 | private: | |
5936 | cpp_hashnode *m_macro; | |
5937 | }; | |
5938 | ||
0d7d8e66 DM |
5939 | /* Determine if it can ever make sense to offer RID as a suggestion for |
5940 | a misspelling. | |
5941 | ||
5942 | Subroutine of lookup_name_fuzzy. */ | |
5943 | ||
5944 | static bool | |
5945 | suggest_rid_p (enum rid rid) | |
5946 | { | |
5947 | switch (rid) | |
5948 | { | |
5949 | /* Support suggesting function-like keywords. */ | |
5950 | case RID_STATIC_ASSERT: | |
5951 | return true; | |
5952 | ||
5953 | default: | |
5954 | /* Support suggesting the various decl-specifier words, to handle | |
5955 | e.g. "singed" vs "signed" typos. */ | |
5956 | if (cp_keyword_starts_decl_specifier_p (rid)) | |
5957 | return true; | |
5958 | ||
5959 | /* Otherwise, don't offer it. This avoids suggesting e.g. "if" | |
5960 | and "do" for short misspellings, which are likely to lead to | |
5961 | nonsensical results. */ | |
5962 | return false; | |
5963 | } | |
5964 | } | |
01ada121 | 5965 | |
b655c310 NS |
5966 | /* Search for near-matches for NAME within the current bindings, and within |
5967 | macro names, returning the best match as a const char *, or NULL if | |
01ada121 DM |
5968 | no reasonable match is found. |
5969 | ||
5970 | Use LOC for any deferred diagnostics. */ | |
575bfb00 | 5971 | |
6c7a259b | 5972 | name_hint |
01ada121 | 5973 | lookup_name_fuzzy (tree name, enum lookup_name_fuzzy_kind kind, location_t loc) |
e8f43da6 | 5974 | { |
b655c310 | 5975 | gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE); |
e8f43da6 | 5976 | |
26edace6 DM |
5977 | /* First, try some well-known names in the C++ standard library, in case |
5978 | the user forgot a #include. */ | |
5979 | const char *header_hint | |
5980 | = get_cp_stdlib_header_for_name (IDENTIFIER_POINTER (name)); | |
5981 | if (header_hint) | |
5982 | return name_hint (NULL, | |
5983 | new suggest_missing_header (loc, | |
5984 | IDENTIFIER_POINTER (name), | |
5985 | header_hint)); | |
5986 | ||
b655c310 | 5987 | best_match <tree, const char *> bm (name); |
e8f43da6 | 5988 | |
b655c310 NS |
5989 | cp_binding_level *lvl; |
5990 | for (lvl = scope_chain->class_bindings; lvl; lvl = lvl->level_chain) | |
5991 | consider_binding_level (name, bm, lvl, true, kind); | |
e8f43da6 | 5992 | |
b655c310 NS |
5993 | for (lvl = current_binding_level; lvl; lvl = lvl->level_chain) |
5994 | consider_binding_level (name, bm, lvl, false, kind); | |
e8f43da6 | 5995 | |
b655c310 NS |
5996 | /* Consider macros: if the user misspelled a macro name e.g. "SOME_MACRO" |
5997 | as: | |
5998 | x = SOME_OTHER_MACRO (y); | |
5999 | then "SOME_OTHER_MACRO" will survive to the frontend and show up | |
6000 | as a misspelled identifier. | |
e8f43da6 | 6001 | |
b655c310 NS |
6002 | Use the best distance so far so that a candidate is only set if |
6003 | a macro is better than anything so far. This allows early rejection | |
6004 | (without calculating the edit distance) of macro names that must have | |
6005 | distance >= bm.get_best_distance (), and means that we only get a | |
6006 | non-NULL result for best_macro_match if it's better than any of | |
6007 | the identifiers already checked. */ | |
6008 | best_macro_match bmm (name, bm.get_best_distance (), parse_in); | |
6009 | cpp_hashnode *best_macro = bmm.get_best_meaningful_candidate (); | |
6010 | /* If a macro is the closest so far to NAME, consider it. */ | |
6011 | if (best_macro) | |
6012 | bm.consider ((const char *)best_macro->ident.str); | |
01ada121 DM |
6013 | else if (bmm.get_best_distance () == 0) |
6014 | { | |
b0cc1e53 DM |
6015 | /* If we have an exact match for a macro name, then either the |
6016 | macro was used with the wrong argument count, or the macro | |
6017 | has been used before it was defined. */ | |
01ada121 | 6018 | cpp_hashnode *macro = bmm.blithely_get_best_candidate (); |
e30947eb | 6019 | if (macro && (macro->flags & NODE_BUILTIN) == 0) |
01ada121 | 6020 | return name_hint (NULL, |
b0cc1e53 | 6021 | macro_use_before_def::maybe_make (loc, macro)); |
01ada121 | 6022 | } |
00e8de68 | 6023 | |
b655c310 NS |
6024 | /* Try the "starts_decl_specifier_p" keywords to detect |
6025 | "singed" vs "signed" typos. */ | |
6026 | for (unsigned i = 0; i < num_c_common_reswords; i++) | |
6027 | { | |
6028 | const c_common_resword *resword = &c_common_reswords[i]; | |
00e8de68 | 6029 | |
0d7d8e66 DM |
6030 | if (!suggest_rid_p (resword->rid)) |
6031 | continue; | |
00e8de68 | 6032 | |
b655c310 NS |
6033 | tree resword_identifier = ridpointers [resword->rid]; |
6034 | if (!resword_identifier) | |
6035 | continue; | |
6036 | gcc_assert (TREE_CODE (resword_identifier) == IDENTIFIER_NODE); | |
00e8de68 | 6037 | |
b655c310 NS |
6038 | /* Only consider reserved words that survived the |
6039 | filtering in init_reswords (e.g. for -std). */ | |
84c0088f | 6040 | if (!IDENTIFIER_KEYWORD_P (resword_identifier)) |
b655c310 | 6041 | continue; |
00e8de68 | 6042 | |
b655c310 NS |
6043 | bm.consider (IDENTIFIER_POINTER (resword_identifier)); |
6044 | } | |
6045 | ||
6c7a259b | 6046 | return name_hint (bm.get_best_meaningful_candidate (), NULL); |
b655c310 | 6047 | } |
5a167978 | 6048 | |
b655c310 | 6049 | /* Subroutine of outer_binding. |
5a167978 | 6050 | |
b655c310 NS |
6051 | Returns TRUE if BINDING is a binding to a template parameter of |
6052 | SCOPE. In that case SCOPE is the scope of a primary template | |
6053 | parameter -- in the sense of G++, i.e, a template that has its own | |
6054 | template header. | |
5a167978 | 6055 | |
b655c310 | 6056 | Returns FALSE otherwise. */ |
5a167978 GDR |
6057 | |
6058 | static bool | |
b655c310 NS |
6059 | binding_to_template_parms_of_scope_p (cxx_binding *binding, |
6060 | cp_binding_level *scope) | |
5a167978 | 6061 | { |
b655c310 NS |
6062 | tree binding_value, tmpl, tinfo; |
6063 | int level; | |
5a167978 | 6064 | |
b655c310 NS |
6065 | if (!binding || !scope || !scope->this_entity) |
6066 | return false; | |
6067 | ||
6068 | binding_value = binding->value ? binding->value : binding->type; | |
6069 | tinfo = get_template_info (scope->this_entity); | |
6070 | ||
6071 | /* BINDING_VALUE must be a template parm. */ | |
6072 | if (binding_value == NULL_TREE | |
6073 | || (!DECL_P (binding_value) | |
6074 | || !DECL_TEMPLATE_PARM_P (binding_value))) | |
6075 | return false; | |
6076 | ||
6077 | /* The level of BINDING_VALUE. */ | |
6078 | level = | |
6079 | template_type_parameter_p (binding_value) | |
6080 | ? TEMPLATE_PARM_LEVEL (TEMPLATE_TYPE_PARM_INDEX | |
6081 | (TREE_TYPE (binding_value))) | |
6082 | : TEMPLATE_PARM_LEVEL (DECL_INITIAL (binding_value)); | |
6083 | ||
6084 | /* The template of the current scope, iff said scope is a primary | |
6085 | template. */ | |
6086 | tmpl = (tinfo | |
6087 | && PRIMARY_TEMPLATE_P (TI_TEMPLATE (tinfo)) | |
6088 | ? TI_TEMPLATE (tinfo) | |
6089 | : NULL_TREE); | |
6090 | ||
6091 | /* If the level of the parm BINDING_VALUE equals the depth of TMPL, | |
6092 | then BINDING_VALUE is a parameter of TMPL. */ | |
6093 | return (tmpl && level == TMPL_PARMS_DEPTH (DECL_TEMPLATE_PARMS (tmpl))); | |
5a167978 GDR |
6094 | } |
6095 | ||
b655c310 NS |
6096 | /* Return the innermost non-namespace binding for NAME from a scope |
6097 | containing BINDING, or, if BINDING is NULL, the current scope. | |
6098 | Please note that for a given template, the template parameters are | |
6099 | considered to be in the scope containing the current scope. | |
6100 | If CLASS_P is false, then class bindings are ignored. */ | |
86098eb8 | 6101 | |
b655c310 NS |
6102 | cxx_binding * |
6103 | outer_binding (tree name, | |
6104 | cxx_binding *binding, | |
6105 | bool class_p) | |
86098eb8 | 6106 | { |
b655c310 NS |
6107 | cxx_binding *outer; |
6108 | cp_binding_level *scope; | |
6109 | cp_binding_level *outer_scope; | |
d4ccba66 | 6110 | |
b655c310 | 6111 | if (binding) |
86098eb8 | 6112 | { |
b655c310 NS |
6113 | scope = binding->scope->level_chain; |
6114 | outer = binding->previous; | |
6115 | } | |
6116 | else | |
6117 | { | |
6118 | scope = current_binding_level; | |
6119 | outer = IDENTIFIER_BINDING (name); | |
86098eb8 | 6120 | } |
b655c310 | 6121 | outer_scope = outer ? outer->scope : NULL; |
d4ccba66 | 6122 | |
b655c310 NS |
6123 | /* Because we create class bindings lazily, we might be missing a |
6124 | class binding for NAME. If there are any class binding levels | |
6125 | between the LAST_BINDING_LEVEL and the scope in which OUTER was | |
6126 | declared, we must lookup NAME in those class scopes. */ | |
6127 | if (class_p) | |
6128 | while (scope && scope != outer_scope && scope->kind != sk_namespace) | |
6129 | { | |
6130 | if (scope->kind == sk_class) | |
6131 | { | |
6132 | cxx_binding *class_binding; | |
d4ccba66 | 6133 | |
b655c310 NS |
6134 | class_binding = get_class_binding (name, scope); |
6135 | if (class_binding) | |
6136 | { | |
6137 | /* Thread this new class-scope binding onto the | |
6138 | IDENTIFIER_BINDING list so that future lookups | |
6139 | find it quickly. */ | |
6140 | class_binding->previous = outer; | |
6141 | if (binding) | |
6142 | binding->previous = class_binding; | |
6143 | else | |
6144 | IDENTIFIER_BINDING (name) = class_binding; | |
6145 | return class_binding; | |
6146 | } | |
6147 | } | |
6148 | /* If we are in a member template, the template parms of the member | |
6149 | template are considered to be inside the scope of the containing | |
6150 | class, but within G++ the class bindings are all pushed between the | |
6151 | template parms and the function body. So if the outer binding is | |
6152 | a template parm for the current scope, return it now rather than | |
6153 | look for a class binding. */ | |
6154 | if (outer_scope && outer_scope->kind == sk_template_parms | |
6155 | && binding_to_template_parms_of_scope_p (outer, scope)) | |
6156 | return outer; | |
6157 | ||
6158 | scope = scope->level_chain; | |
6159 | } | |
6160 | ||
6161 | return outer; | |
86098eb8 JM |
6162 | } |
6163 | ||
b655c310 NS |
6164 | /* Return the innermost block-scope or class-scope value binding for |
6165 | NAME, or NULL_TREE if there is no such binding. */ | |
5a167978 | 6166 | |
b655c310 NS |
6167 | tree |
6168 | innermost_non_namespace_value (tree name) | |
5a167978 | 6169 | { |
b655c310 NS |
6170 | cxx_binding *binding; |
6171 | binding = outer_binding (name, /*binding=*/NULL, /*class_p=*/true); | |
6172 | return binding ? binding->value : NULL_TREE; | |
6173 | } | |
5a167978 | 6174 | |
b655c310 NS |
6175 | /* Look up NAME in the current binding level and its superiors in the |
6176 | namespace of variables, functions and typedefs. Return a ..._DECL | |
6177 | node of some kind representing its definition if there is only one | |
6178 | such declaration, or return a TREE_LIST with all the overloaded | |
6179 | definitions if there are many, or return 0 if it is undefined. | |
6180 | Hidden name, either friend declaration or built-in function, are | |
6181 | not ignored. | |
86098eb8 | 6182 | |
b655c310 NS |
6183 | If PREFER_TYPE is > 0, we prefer TYPE_DECLs or namespaces. |
6184 | If PREFER_TYPE is > 1, we reject non-type decls (e.g. namespaces). | |
6185 | Otherwise we prefer non-TYPE_DECLs. | |
c8094d83 | 6186 | |
b655c310 NS |
6187 | If NONCLASS is nonzero, bindings in class scopes are ignored. If |
6188 | BLOCK_P is false, bindings in block scopes are ignored. */ | |
4cfaec1c | 6189 | |
b655c310 NS |
6190 | static tree |
6191 | lookup_name_real_1 (tree name, int prefer_type, int nonclass, bool block_p, | |
6192 | int namespaces_only, int flags) | |
6193 | { | |
6194 | cxx_binding *iter; | |
6195 | tree val = NULL_TREE; | |
5a167978 | 6196 | |
b655c310 NS |
6197 | query_oracle (name); |
6198 | ||
6199 | /* Conversion operators are handled specially because ordinary | |
6200 | unqualified name lookup will not find template conversion | |
6201 | operators. */ | |
84c0088f | 6202 | if (IDENTIFIER_CONV_OP_P (name)) |
d63d5d0c | 6203 | { |
b655c310 | 6204 | cp_binding_level *level; |
d63d5d0c | 6205 | |
b655c310 NS |
6206 | for (level = current_binding_level; |
6207 | level && level->kind != sk_namespace; | |
6208 | level = level->level_chain) | |
6209 | { | |
6210 | tree class_type; | |
6211 | tree operators; | |
6212 | ||
6213 | /* A conversion operator can only be declared in a class | |
6214 | scope. */ | |
6215 | if (level->kind != sk_class) | |
6216 | continue; | |
6217 | ||
6218 | /* Lookup the conversion operator in the class. */ | |
6219 | class_type = level->this_entity; | |
6220 | operators = lookup_fnfields (class_type, name, /*protect=*/0); | |
6221 | if (operators) | |
6222 | return operators; | |
6223 | } | |
6224 | ||
6225 | return NULL_TREE; | |
d63d5d0c | 6226 | } |
c8094d83 | 6227 | |
b655c310 NS |
6228 | flags |= lookup_flags (prefer_type, namespaces_only); |
6229 | ||
6230 | /* First, look in non-namespace scopes. */ | |
6231 | ||
6232 | if (current_class_type == NULL_TREE) | |
6233 | nonclass = 1; | |
5a167978 | 6234 | |
b655c310 NS |
6235 | if (block_p || !nonclass) |
6236 | for (iter = outer_binding (name, NULL, !nonclass); | |
6237 | iter; | |
6238 | iter = outer_binding (name, iter, !nonclass)) | |
6239 | { | |
6240 | tree binding; | |
5a167978 | 6241 | |
b655c310 NS |
6242 | /* Skip entities we don't want. */ |
6243 | if (LOCAL_BINDING_P (iter) ? !block_p : nonclass) | |
6244 | continue; | |
5a167978 | 6245 | |
b655c310 NS |
6246 | /* If this is the kind of thing we're looking for, we're done. */ |
6247 | if (qualify_lookup (iter->value, flags)) | |
6248 | binding = iter->value; | |
6249 | else if ((flags & LOOKUP_PREFER_TYPES) | |
6250 | && qualify_lookup (iter->type, flags)) | |
6251 | binding = iter->type; | |
6252 | else | |
6253 | binding = NULL_TREE; | |
5a167978 | 6254 | |
b655c310 NS |
6255 | if (binding) |
6256 | { | |
ef4c5e78 | 6257 | if (TREE_CODE (binding) == TYPE_DECL && DECL_HIDDEN_P (binding)) |
b655c310 NS |
6258 | { |
6259 | /* A non namespace-scope binding can only be hidden in the | |
6260 | presence of a local class, due to friend declarations. | |
5a167978 | 6261 | |
b655c310 | 6262 | In particular, consider: |
ba796308 | 6263 | |
b655c310 NS |
6264 | struct C; |
6265 | void f() { | |
6266 | struct A { | |
6267 | friend struct B; | |
6268 | friend struct C; | |
6269 | void g() { | |
6270 | B* b; // error: B is hidden | |
6271 | C* c; // OK, finds ::C | |
6272 | } | |
6273 | }; | |
6274 | B *b; // error: B is hidden | |
6275 | C *c; // OK, finds ::C | |
6276 | struct B {}; | |
6277 | B *bb; // OK | |
6278 | } | |
5a167978 | 6279 | |
b655c310 NS |
6280 | The standard says that "B" is a local class in "f" |
6281 | (but not nested within "A") -- but that name lookup | |
6282 | for "B" does not find this declaration until it is | |
6283 | declared directly with "f". | |
5a167978 | 6284 | |
b655c310 | 6285 | In particular: |
c8094d83 | 6286 | |
b655c310 | 6287 | [class.friend] |
5a167978 | 6288 | |
b655c310 NS |
6289 | If a friend declaration appears in a local class and |
6290 | the name specified is an unqualified name, a prior | |
6291 | declaration is looked up without considering scopes | |
6292 | that are outside the innermost enclosing non-class | |
6293 | scope. For a friend function declaration, if there is | |
6294 | no prior declaration, the program is ill-formed. For a | |
6295 | friend class declaration, if there is no prior | |
6296 | declaration, the class that is specified belongs to the | |
6297 | innermost enclosing non-class scope, but if it is | |
6298 | subsequently referenced, its name is not found by name | |
6299 | lookup until a matching declaration is provided in the | |
6300 | innermost enclosing nonclass scope. | |
ccb14335 | 6301 | |
b655c310 NS |
6302 | So just keep looking for a non-hidden binding. |
6303 | */ | |
6304 | gcc_assert (TREE_CODE (binding) == TYPE_DECL); | |
6305 | continue; | |
6306 | } | |
6307 | val = binding; | |
6308 | break; | |
6309 | } | |
6310 | } | |
2395cd2e | 6311 | |
b655c310 NS |
6312 | /* Now lookup in namespace scopes. */ |
6313 | if (!val) | |
932f48ac NS |
6314 | { |
6315 | name_lookup lookup (name, flags); | |
6316 | if (lookup.search_unqualified | |
6317 | (current_decl_namespace (), current_binding_level)) | |
6318 | val = lookup.value; | |
6319 | } | |
c8b2e872 | 6320 | |
b655c310 NS |
6321 | /* If we have a single function from a using decl, pull it out. */ |
6322 | if (val && TREE_CODE (val) == OVERLOAD && !really_overloaded_fn (val)) | |
6323 | val = OVL_FUNCTION (val); | |
6324 | ||
6325 | return val; | |
db10df3d JM |
6326 | } |
6327 | ||
b655c310 | 6328 | /* Wrapper for lookup_name_real_1. */ |
db10df3d | 6329 | |
b655c310 NS |
6330 | tree |
6331 | lookup_name_real (tree name, int prefer_type, int nonclass, bool block_p, | |
6332 | int namespaces_only, int flags) | |
db10df3d | 6333 | { |
b655c310 NS |
6334 | tree ret; |
6335 | bool subtime = timevar_cond_start (TV_NAME_LOOKUP); | |
6336 | ret = lookup_name_real_1 (name, prefer_type, nonclass, block_p, | |
6337 | namespaces_only, flags); | |
6338 | timevar_cond_stop (TV_NAME_LOOKUP, subtime); | |
6339 | return ret; | |
6340 | } | |
db10df3d | 6341 | |
b655c310 NS |
6342 | tree |
6343 | lookup_name_nonclass (tree name) | |
6344 | { | |
6345 | return lookup_name_real (name, 0, 1, /*block_p=*/true, 0, 0); | |
db10df3d JM |
6346 | } |
6347 | ||
b655c310 NS |
6348 | tree |
6349 | lookup_name (tree name) | |
6350 | { | |
6351 | return lookup_name_real (name, 0, 0, /*block_p=*/true, 0, 0); | |
6352 | } | |
db10df3d | 6353 | |
b655c310 NS |
6354 | tree |
6355 | lookup_name_prefer_type (tree name, int prefer_type) | |
db10df3d | 6356 | { |
b655c310 NS |
6357 | return lookup_name_real (name, prefer_type, 0, /*block_p=*/true, 0, 0); |
6358 | } | |
db10df3d | 6359 | |
b655c310 NS |
6360 | /* Look up NAME for type used in elaborated name specifier in |
6361 | the scopes given by SCOPE. SCOPE can be either TS_CURRENT or | |
6362 | TS_WITHIN_ENCLOSING_NON_CLASS. Although not implied by the | |
6363 | name, more scopes are checked if cleanup or template parameter | |
6364 | scope is encountered. | |
db10df3d | 6365 | |
b655c310 NS |
6366 | Unlike lookup_name_real, we make sure that NAME is actually |
6367 | declared in the desired scope, not from inheritance, nor using | |
6368 | directive. For using declaration, there is DR138 still waiting | |
6369 | to be resolved. Hidden name coming from an earlier friend | |
6370 | declaration is also returned. | |
db10df3d | 6371 | |
b655c310 NS |
6372 | A TYPE_DECL best matching the NAME is returned. Catching error |
6373 | and issuing diagnostics are caller's responsibility. */ | |
db10df3d | 6374 | |
b655c310 NS |
6375 | static tree |
6376 | lookup_type_scope_1 (tree name, tag_scope scope) | |
6377 | { | |
6378 | cxx_binding *iter = NULL; | |
6379 | tree val = NULL_TREE; | |
3c9cca88 | 6380 | cp_binding_level *level = NULL; |
db10df3d | 6381 | |
b655c310 NS |
6382 | /* Look in non-namespace scope first. */ |
6383 | if (current_binding_level->kind != sk_namespace) | |
6384 | iter = outer_binding (name, NULL, /*class_p=*/ true); | |
6385 | for (; iter; iter = outer_binding (name, iter, /*class_p=*/ true)) | |
5a167978 | 6386 | { |
b655c310 NS |
6387 | /* Check if this is the kind of thing we're looking for. |
6388 | If SCOPE is TS_CURRENT, also make sure it doesn't come from | |
6389 | base class. For ITER->VALUE, we can simply use | |
6390 | INHERITED_VALUE_BINDING_P. For ITER->TYPE, we have to use | |
6391 | our own check. | |
5a167978 | 6392 | |
b655c310 NS |
6393 | We check ITER->TYPE before ITER->VALUE in order to handle |
6394 | typedef struct C {} C; | |
6395 | correctly. */ | |
5a167978 | 6396 | |
b655c310 NS |
6397 | if (qualify_lookup (iter->type, LOOKUP_PREFER_TYPES) |
6398 | && (scope != ts_current | |
6399 | || LOCAL_BINDING_P (iter) | |
6400 | || DECL_CONTEXT (iter->type) == iter->scope->this_entity)) | |
6401 | val = iter->type; | |
6402 | else if ((scope != ts_current | |
6403 | || !INHERITED_VALUE_BINDING_P (iter)) | |
6404 | && qualify_lookup (iter->value, LOOKUP_PREFER_TYPES)) | |
6405 | val = iter->value; | |
5a167978 | 6406 | |
b655c310 NS |
6407 | if (val) |
6408 | break; | |
6409 | } | |
5a167978 | 6410 | |
b655c310 | 6411 | /* Look in namespace scope. */ |
3c9cca88 NS |
6412 | if (val) |
6413 | level = iter->scope; | |
6414 | else | |
5a167978 | 6415 | { |
3c9cca88 | 6416 | tree ns = current_decl_namespace (); |
b655c310 | 6417 | |
3c9cca88 | 6418 | if (tree *slot = find_namespace_slot (ns, name)) |
b655c310 NS |
6419 | { |
6420 | /* If this is the kind of thing we're looking for, we're done. */ | |
3c9cca88 NS |
6421 | if (tree type = MAYBE_STAT_TYPE (*slot)) |
6422 | if (qualify_lookup (type, LOOKUP_PREFER_TYPES)) | |
6423 | val = type; | |
6424 | if (!val) | |
6425 | { | |
6426 | if (tree decl = MAYBE_STAT_DECL (*slot)) | |
6427 | if (qualify_lookup (decl, LOOKUP_PREFER_TYPES)) | |
6428 | val = decl; | |
6429 | } | |
6430 | level = NAMESPACE_LEVEL (ns); | |
b655c310 | 6431 | } |
5a167978 | 6432 | } |
b655c310 NS |
6433 | |
6434 | /* Type found, check if it is in the allowed scopes, ignoring cleanup | |
6435 | and template parameter scopes. */ | |
6436 | if (val) | |
5a167978 | 6437 | { |
b655c310 NS |
6438 | cp_binding_level *b = current_binding_level; |
6439 | while (b) | |
6440 | { | |
3c9cca88 | 6441 | if (level == b) |
b655c310 | 6442 | return val; |
5d80a306 | 6443 | |
b655c310 NS |
6444 | if (b->kind == sk_cleanup || b->kind == sk_template_parms |
6445 | || b->kind == sk_function_parms) | |
6446 | b = b->level_chain; | |
6447 | else if (b->kind == sk_class | |
6448 | && scope == ts_within_enclosing_non_class) | |
6449 | b = b->level_chain; | |
6450 | else | |
6451 | break; | |
6452 | } | |
5a167978 | 6453 | } |
5a167978 | 6454 | |
b655c310 | 6455 | return NULL_TREE; |
5a167978 | 6456 | } |
b655c310 NS |
6457 | |
6458 | /* Wrapper for lookup_type_scope_1. */ | |
5a167978 | 6459 | |
b655c310 NS |
6460 | tree |
6461 | lookup_type_scope (tree name, tag_scope scope) | |
c166b898 | 6462 | { |
b655c310 NS |
6463 | tree ret; |
6464 | bool subtime = timevar_cond_start (TV_NAME_LOOKUP); | |
6465 | ret = lookup_type_scope_1 (name, scope); | |
6466 | timevar_cond_stop (TV_NAME_LOOKUP, subtime); | |
6467 | return ret; | |
c166b898 ILT |
6468 | } |
6469 | ||
b655c310 NS |
6470 | /* Returns true iff DECL is a block-scope extern declaration of a function |
6471 | or variable. */ | |
6472 | ||
6473 | bool | |
6474 | is_local_extern (tree decl) | |
5a167978 | 6475 | { |
b655c310 | 6476 | cxx_binding *binding; |
5a167978 | 6477 | |
b655c310 NS |
6478 | /* For functions, this is easy. */ |
6479 | if (TREE_CODE (decl) == FUNCTION_DECL) | |
6480 | return DECL_LOCAL_FUNCTION_P (decl); | |
d63d5d0c | 6481 | |
b655c310 NS |
6482 | if (!VAR_P (decl)) |
6483 | return false; | |
6484 | if (!current_function_decl) | |
6485 | return false; | |
5a167978 | 6486 | |
b655c310 NS |
6487 | /* For variables, this is not easy. We need to look at the binding stack |
6488 | for the identifier to see whether the decl we have is a local. */ | |
6489 | for (binding = IDENTIFIER_BINDING (DECL_NAME (decl)); | |
6490 | binding && binding->scope->kind != sk_namespace; | |
6491 | binding = binding->previous) | |
6492 | if (binding->value == decl) | |
6493 | return LOCAL_BINDING_P (binding); | |
5a167978 | 6494 | |
b655c310 NS |
6495 | return false; |
6496 | } | |
ca1085f0 | 6497 | |
00e8de68 GDR |
6498 | /* The type TYPE is being declared. If it is a class template, or a |
6499 | specialization of a class template, do any processing required and | |
6500 | perform error-checking. If IS_FRIEND is nonzero, this TYPE is | |
6501 | being declared a friend. B is the binding level at which this TYPE | |
6502 | should be bound. | |
6503 | ||
6504 | Returns the TYPE_DECL for TYPE, which may have been altered by this | |
6505 | processing. */ | |
6506 | ||
6507 | static tree | |
bd3d082e | 6508 | maybe_process_template_type_declaration (tree type, int is_friend, |
2c140474 | 6509 | cp_binding_level *b) |
00e8de68 GDR |
6510 | { |
6511 | tree decl = TYPE_NAME (type); | |
6512 | ||
6513 | if (processing_template_parmlist) | |
6514 | /* You can't declare a new template type in a template parameter | |
6515 | list. But, you can declare a non-template type: | |
6516 | ||
0cbd7506 | 6517 | template <class A*> struct S; |
00e8de68 GDR |
6518 | |
6519 | is a forward-declaration of `A'. */ | |
6520 | ; | |
c43e95f8 MM |
6521 | else if (b->kind == sk_namespace |
6522 | && current_binding_level->kind != sk_namespace) | |
6523 | /* If this new type is being injected into a containing scope, | |
6524 | then it's not a template type. */ | |
6525 | ; | |
00e8de68 GDR |
6526 | else |
6527 | { | |
9e1e64ec PC |
6528 | gcc_assert (MAYBE_CLASS_TYPE_P (type) |
6529 | || TREE_CODE (type) == ENUMERAL_TYPE); | |
00e8de68 GDR |
6530 | |
6531 | if (processing_template_decl) | |
6532 | { | |
6533 | /* This may change after the call to | |
6534 | push_template_decl_real, but we want the original value. */ | |
6535 | tree name = DECL_NAME (decl); | |
6536 | ||
bd3d082e | 6537 | decl = push_template_decl_real (decl, is_friend); |
79faac54 PC |
6538 | if (decl == error_mark_node) |
6539 | return error_mark_node; | |
6540 | ||
00e8de68 GDR |
6541 | /* If the current binding level is the binding level for the |
6542 | template parameters (see the comment in | |
6543 | begin_template_parm_list) and the enclosing level is a class | |
6544 | scope, and we're not looking at a friend, push the | |
6545 | declaration of the member class into the class scope. In the | |
6546 | friend case, push_template_decl will already have put the | |
6547 | friend into global scope, if appropriate. */ | |
6548 | if (TREE_CODE (type) != ENUMERAL_TYPE | |
bd3d082e | 6549 | && !is_friend && b->kind == sk_template_parms |
00e8de68 GDR |
6550 | && b->level_chain->kind == sk_class) |
6551 | { | |
6552 | finish_member_declaration (CLASSTYPE_TI_TEMPLATE (type)); | |
e57df6fe | 6553 | |
00e8de68 GDR |
6554 | if (!COMPLETE_TYPE_P (current_class_type)) |
6555 | { | |
6556 | maybe_add_class_template_decl_list (current_class_type, | |
6557 | type, /*friend_p=*/0); | |
c72a1a86 | 6558 | /* Put this UTD in the table of UTDs for the class. */ |
e57df6fe KL |
6559 | if (CLASSTYPE_NESTED_UTDS (current_class_type) == NULL) |
6560 | CLASSTYPE_NESTED_UTDS (current_class_type) = | |
6561 | binding_table_new (SCOPE_DEFAULT_HT_SIZE); | |
6562 | ||
6563 | binding_table_insert | |
6564 | (CLASSTYPE_NESTED_UTDS (current_class_type), name, type); | |
00e8de68 GDR |
6565 | } |
6566 | } | |
6567 | } | |
6568 | } | |
6569 | ||
6570 | return decl; | |
6571 | } | |
6572 | ||
5a24482e KL |
6573 | /* Push a tag name NAME for struct/class/union/enum type TYPE. In case |
6574 | that the NAME is a class template, the tag is processed but not pushed. | |
6575 | ||
6576 | The pushed scope depend on the SCOPE parameter: | |
6577 | - When SCOPE is TS_CURRENT, put it into the inner-most non-sk_cleanup | |
6578 | scope. | |
6579 | - When SCOPE is TS_GLOBAL, put it in the inner-most non-class and | |
6580 | non-template-parameter scope. This case is needed for forward | |
6581 | declarations. | |
6582 | - When SCOPE is TS_WITHIN_ENCLOSING_NON_CLASS, this is similar to | |
6583 | TS_GLOBAL case except that names within template-parameter scopes | |
6584 | are not pushed at all. | |
6585 | ||
c6f9f83b | 6586 | Returns TYPE upon success and ERROR_MARK_NODE otherwise. */ |
00e8de68 | 6587 | |
575bfb00 | 6588 | static tree |
5256a7f5 | 6589 | do_pushtag (tree name, tree type, tag_scope scope) |
00e8de68 | 6590 | { |
6a000704 | 6591 | tree decl; |
00e8de68 | 6592 | |
5256a7f5 | 6593 | cp_binding_level *b = current_binding_level; |
7c82a41e MM |
6594 | while (/* Cleanup scopes are not scopes from the point of view of |
6595 | the language. */ | |
6596 | b->kind == sk_cleanup | |
b344d949 JM |
6597 | /* Neither are function parameter scopes. */ |
6598 | || b->kind == sk_function_parms | |
7c82a41e MM |
6599 | /* Neither are the scopes used to hold template parameters |
6600 | for an explicit specialization. For an ordinary template | |
6601 | declaration, these scopes are not scopes from the point of | |
5a24482e KL |
6602 | view of the language. */ |
6603 | || (b->kind == sk_template_parms | |
6604 | && (b->explicit_spec_p || scope == ts_global)) | |
00e8de68 | 6605 | || (b->kind == sk_class |
bd3d082e | 6606 | && (scope != ts_current |
00e8de68 GDR |
6607 | /* We may be defining a new type in the initializer |
6608 | of a static member variable. We allow this when | |
6609 | not pedantic, and it is particularly useful for | |
6610 | type punning via an anonymous union. */ | |
6611 | || COMPLETE_TYPE_P (b->this_entity)))) | |
6612 | b = b->level_chain; | |
6613 | ||
9dc6f476 | 6614 | gcc_assert (identifier_p (name)); |
3db45ab5 | 6615 | |
6a000704 | 6616 | /* Do C++ gratuitous typedefing. */ |
575bfb00 | 6617 | if (identifier_type_value_1 (name) != type) |
00e8de68 | 6618 | { |
6a000704 NS |
6619 | tree tdef; |
6620 | int in_class = 0; | |
6621 | tree context = TYPE_CONTEXT (type); | |
00e8de68 | 6622 | |
6a000704 NS |
6623 | if (! context) |
6624 | { | |
6625 | tree cs = current_scope (); | |
3db45ab5 | 6626 | |
d5f4eddd JM |
6627 | if (scope == ts_current |
6628 | || (cs && TREE_CODE (cs) == FUNCTION_DECL)) | |
6a000704 | 6629 | context = cs; |
c443f3d5 | 6630 | else if (cs && TYPE_P (cs)) |
6a000704 NS |
6631 | /* When declaring a friend class of a local class, we want |
6632 | to inject the newly named class into the scope | |
6633 | containing the local class, not the namespace | |
6634 | scope. */ | |
6635 | context = decl_function_context (get_type_decl (cs)); | |
6636 | } | |
6637 | if (!context) | |
6638 | context = current_namespace; | |
bd3d082e | 6639 | |
6a000704 NS |
6640 | if (b->kind == sk_class |
6641 | || (b->kind == sk_template_parms | |
6642 | && b->level_chain->kind == sk_class)) | |
6643 | in_class = 1; | |
00e8de68 | 6644 | |
6a000704 NS |
6645 | tdef = create_implicit_typedef (name, type); |
6646 | DECL_CONTEXT (tdef) = FROB_CONTEXT (context); | |
6647 | if (scope == ts_within_enclosing_non_class) | |
00e8de68 | 6648 | { |
6a000704 NS |
6649 | /* This is a friend. Make this TYPE_DECL node hidden from |
6650 | ordinary name lookup. Its corresponding TEMPLATE_DECL | |
6651 | will be marked in push_template_decl_real. */ | |
6652 | retrofit_lang_decl (tdef); | |
6653 | DECL_ANTICIPATED (tdef) = 1; | |
6654 | DECL_FRIEND_P (tdef) = 1; | |
6655 | } | |
e57df6fe | 6656 | |
6a000704 NS |
6657 | decl = maybe_process_template_type_declaration |
6658 | (type, scope == ts_within_enclosing_non_class, b); | |
6659 | if (decl == error_mark_node) | |
575bfb00 | 6660 | return decl; |
3db45ab5 | 6661 | |
6a000704 NS |
6662 | if (b->kind == sk_class) |
6663 | { | |
5d011fcf NS |
6664 | if (!TYPE_BEING_DEFINED (current_class_type) |
6665 | && !LAMBDA_TYPE_P (type)) | |
575bfb00 | 6666 | return error_mark_node; |
0efc4442 | 6667 | |
6a000704 NS |
6668 | if (!PROCESSING_REAL_TEMPLATE_DECL_P ()) |
6669 | /* Put this TYPE_DECL on the TYPE_FIELDS list for the | |
6670 | class. But if it's a member template class, we want | |
6671 | the TEMPLATE_DECL, not the TYPE_DECL, so this is done | |
6672 | later. */ | |
6673 | finish_member_declaration (decl); | |
6674 | else | |
6675 | pushdecl_class_level (decl); | |
00e8de68 | 6676 | } |
6a000704 | 6677 | else if (b->kind != sk_template_parms) |
c5f8391c | 6678 | { |
5256a7f5 | 6679 | decl = do_pushdecl_with_scope (decl, b, /*is_friend=*/false); |
c5f8391c | 6680 | if (decl == error_mark_node) |
575bfb00 | 6681 | return decl; |
d3e19c2c PC |
6682 | |
6683 | if (DECL_CONTEXT (decl) == std_node | |
ad9870f2 | 6684 | && init_list_identifier == DECL_NAME (TYPE_NAME (type)) |
d3e19c2c PC |
6685 | && !CLASSTYPE_TEMPLATE_INFO (type)) |
6686 | { | |
61f84e25 PC |
6687 | error ("declaration of %<std::initializer_list%> does not match " |
6688 | "%<#include <initializer_list>%>, isn't a template"); | |
d3e19c2c PC |
6689 | return error_mark_node; |
6690 | } | |
c5f8391c | 6691 | } |
6a000704 | 6692 | |
dc3ca06f SM |
6693 | if (! in_class) |
6694 | set_identifier_type_value_with_scope (name, tdef, b); | |
6695 | ||
6a000704 NS |
6696 | TYPE_CONTEXT (type) = DECL_CONTEXT (decl); |
6697 | ||
6698 | /* If this is a local class, keep track of it. We need this | |
6699 | information for name-mangling, and so that it is possible to | |
6700 | find all function definitions in a translation unit in a | |
6701 | convenient way. (It's otherwise tricky to find a member | |
6702 | function definition it's only pointed to from within a local | |
6703 | class.) */ | |
9ededfc5 | 6704 | if (TYPE_FUNCTION_SCOPE_P (type)) |
fdaf2f48 JM |
6705 | { |
6706 | if (processing_template_decl) | |
6707 | { | |
6708 | /* Push a DECL_EXPR so we call pushtag at the right time in | |
6709 | template instantiation rather than in some nested context. */ | |
6710 | add_decl_expr (decl); | |
6711 | } | |
373d1f5f JM |
6712 | /* Lambdas use LAMBDA_EXPR_DISCRIMINATOR instead. */ |
6713 | else if (!LAMBDA_TYPE_P (type)) | |
9771b263 | 6714 | vec_safe_push (local_classes, type); |
fdaf2f48 | 6715 | } |
00e8de68 | 6716 | } |
c443f3d5 | 6717 | |
6a000704 NS |
6718 | if (b->kind == sk_class |
6719 | && !COMPLETE_TYPE_P (current_class_type)) | |
00e8de68 | 6720 | { |
6a000704 NS |
6721 | maybe_add_class_template_decl_list (current_class_type, |
6722 | type, /*friend_p=*/0); | |
3db45ab5 | 6723 | |
6a000704 NS |
6724 | if (CLASSTYPE_NESTED_UTDS (current_class_type) == NULL) |
6725 | CLASSTYPE_NESTED_UTDS (current_class_type) | |
6726 | = binding_table_new (SCOPE_DEFAULT_HT_SIZE); | |
3db45ab5 | 6727 | |
6a000704 NS |
6728 | binding_table_insert |
6729 | (CLASSTYPE_NESTED_UTDS (current_class_type), name, type); | |
00e8de68 | 6730 | } |
6a000704 NS |
6731 | |
6732 | decl = TYPE_NAME (type); | |
6733 | gcc_assert (TREE_CODE (decl) == TYPE_DECL); | |
6a000704 | 6734 | |
b9e75696 JM |
6735 | /* Set type visibility now if this is a forward declaration. */ |
6736 | TREE_PUBLIC (decl) = 1; | |
6737 | determine_visibility (decl); | |
6738 | ||
575bfb00 LC |
6739 | return type; |
6740 | } | |
6741 | ||
5256a7f5 | 6742 | /* Wrapper for do_pushtag. */ |
575bfb00 LC |
6743 | |
6744 | tree | |
6745 | pushtag (tree name, tree type, tag_scope scope) | |
6746 | { | |
6747 | tree ret; | |
6748 | bool subtime = timevar_cond_start (TV_NAME_LOOKUP); | |
5256a7f5 | 6749 | ret = do_pushtag (name, type, scope); |
575bfb00 LC |
6750 | timevar_cond_stop (TV_NAME_LOOKUP, subtime); |
6751 | return ret; | |
00e8de68 | 6752 | } |
8db29d88 | 6753 | |
00e8de68 | 6754 | \f |
00e8de68 GDR |
6755 | /* Subroutines for reverting temporarily to top-level for instantiation |
6756 | of templates and such. We actually need to clear out the class- and | |
6757 | local-value slots of all identifiers, so that only the global values | |
6758 | are at all visible. Simply setting current_binding_level to the global | |
6759 | scope isn't enough, because more binding levels may be pushed. */ | |
6760 | struct saved_scope *scope_chain; | |
6761 | ||
71f15f31 RG |
6762 | /* Return true if ID has not already been marked. */ |
6763 | ||
6764 | static inline bool | |
6765 | store_binding_p (tree id) | |
6766 | { | |
6767 | if (!id || !IDENTIFIER_BINDING (id)) | |
6768 | return false; | |
6769 | ||
6770 | if (IDENTIFIER_MARKED (id)) | |
6771 | return false; | |
6772 | ||
6773 | return true; | |
6774 | } | |
6775 | ||
6776 | /* Add an appropriate binding to *OLD_BINDINGS which needs to already | |
6777 | have enough space reserved. */ | |
89b578be | 6778 | |
f44b0c8e | 6779 | static void |
9771b263 | 6780 | store_binding (tree id, vec<cxx_saved_binding, va_gc> **old_bindings) |
89b578be | 6781 | { |
f32682ca | 6782 | cxx_saved_binding saved; |
89b578be | 6783 | |
71f15f31 | 6784 | gcc_checking_assert (store_binding_p (id)); |
c8094d83 | 6785 | |
f44b0c8e | 6786 | IDENTIFIER_MARKED (id) = 1; |
89b578be | 6787 | |
f32682ca DN |
6788 | saved.identifier = id; |
6789 | saved.binding = IDENTIFIER_BINDING (id); | |
6790 | saved.real_type_value = REAL_IDENTIFIER_TYPE_VALUE (id); | |
9771b263 | 6791 | (*old_bindings)->quick_push (saved); |
89b578be | 6792 | IDENTIFIER_BINDING (id) = NULL; |
89b578be MM |
6793 | } |
6794 | ||
f44b0c8e | 6795 | static void |
9771b263 | 6796 | store_bindings (tree names, vec<cxx_saved_binding, va_gc> **old_bindings) |
00e8de68 | 6797 | { |
199d1d48 | 6798 | static vec<tree> bindings_need_stored; |
71f15f31 RG |
6799 | tree t, id; |
6800 | size_t i; | |
00e8de68 | 6801 | |
575bfb00 | 6802 | bool subtime = timevar_cond_start (TV_NAME_LOOKUP); |
00e8de68 GDR |
6803 | for (t = names; t; t = TREE_CHAIN (t)) |
6804 | { | |
00e8de68 GDR |
6805 | if (TREE_CODE (t) == TREE_LIST) |
6806 | id = TREE_PURPOSE (t); | |
6807 | else | |
6808 | id = DECL_NAME (t); | |
6809 | ||
71f15f31 | 6810 | if (store_binding_p (id)) |
9771b263 | 6811 | bindings_need_stored.safe_push (id); |
71f15f31 | 6812 | } |
9771b263 | 6813 | if (!bindings_need_stored.is_empty ()) |
71f15f31 | 6814 | { |
9771b263 DN |
6815 | vec_safe_reserve_exact (*old_bindings, bindings_need_stored.length ()); |
6816 | for (i = 0; bindings_need_stored.iterate (i, &id); ++i) | |
71f15f31 | 6817 | { |
5764ee3c | 6818 | /* We can apparently have duplicates in NAMES. */ |
71f15f31 RG |
6819 | if (store_binding_p (id)) |
6820 | store_binding (id, old_bindings); | |
6821 | } | |
9771b263 | 6822 | bindings_need_stored.truncate (0); |
00e8de68 | 6823 | } |
575bfb00 | 6824 | timevar_cond_stop (TV_NAME_LOOKUP, subtime); |
00e8de68 GDR |
6825 | } |
6826 | ||
89b578be MM |
6827 | /* Like store_bindings, but NAMES is a vector of cp_class_binding |
6828 | objects, rather than a TREE_LIST. */ | |
6829 | ||
f44b0c8e | 6830 | static void |
9771b263 DN |
6831 | store_class_bindings (vec<cp_class_binding, va_gc> *names, |
6832 | vec<cxx_saved_binding, va_gc> **old_bindings) | |
89b578be | 6833 | { |
199d1d48 | 6834 | static vec<tree> bindings_need_stored; |
89b578be MM |
6835 | size_t i; |
6836 | cp_class_binding *cb; | |
89b578be | 6837 | |
9771b263 | 6838 | for (i = 0; vec_safe_iterate (names, i, &cb); ++i) |
71f15f31 | 6839 | if (store_binding_p (cb->identifier)) |
9771b263 DN |
6840 | bindings_need_stored.safe_push (cb->identifier); |
6841 | if (!bindings_need_stored.is_empty ()) | |
71f15f31 RG |
6842 | { |
6843 | tree id; | |
9771b263 DN |
6844 | vec_safe_reserve_exact (*old_bindings, bindings_need_stored.length ()); |
6845 | for (i = 0; bindings_need_stored.iterate (i, &id); ++i) | |
71f15f31 | 6846 | store_binding (id, old_bindings); |
9771b263 | 6847 | bindings_need_stored.truncate (0); |
71f15f31 | 6848 | } |
89b578be MM |
6849 | } |
6850 | ||
5c712250 PP |
6851 | /* A chain of saved_scope structures awaiting reuse. */ |
6852 | ||
6853 | static GTY((deletable)) struct saved_scope *free_saved_scope; | |
6854 | ||
c405923d NS |
6855 | static void |
6856 | do_push_to_top_level (void) | |
00e8de68 GDR |
6857 | { |
6858 | struct saved_scope *s; | |
2c140474 | 6859 | cp_binding_level *b; |
f44b0c8e MM |
6860 | cxx_saved_binding *sb; |
6861 | size_t i; | |
30bcc028 | 6862 | bool need_pop; |
00e8de68 | 6863 | |
5c712250 PP |
6864 | /* Reuse or create a new structure for this saved scope. */ |
6865 | if (free_saved_scope != NULL) | |
6866 | { | |
6867 | s = free_saved_scope; | |
6868 | free_saved_scope = s->prev; | |
6869 | ||
6870 | vec<cxx_saved_binding, va_gc> *old_bindings = s->old_bindings; | |
6871 | memset (s, 0, sizeof (*s)); | |
6872 | /* Also reuse the structure's old_bindings vector. */ | |
6873 | vec_safe_truncate (old_bindings, 0); | |
6874 | s->old_bindings = old_bindings; | |
6875 | } | |
6876 | else | |
6877 | s = ggc_cleared_alloc<saved_scope> (); | |
00e8de68 GDR |
6878 | |
6879 | b = scope_chain ? current_binding_level : 0; | |
6880 | ||
6881 | /* If we're in the middle of some function, save our state. */ | |
6882 | if (cfun) | |
6883 | { | |
30bcc028 | 6884 | need_pop = true; |
d2784db4 | 6885 | push_function_context (); |
00e8de68 GDR |
6886 | } |
6887 | else | |
30bcc028 | 6888 | need_pop = false; |
00e8de68 | 6889 | |
89b578be | 6890 | if (scope_chain && previous_class_level) |
f44b0c8e MM |
6891 | store_class_bindings (previous_class_level->class_shadowed, |
6892 | &s->old_bindings); | |
00e8de68 GDR |
6893 | |
6894 | /* Have to include the global scope, because class-scope decls | |
6895 | aren't listed anywhere useful. */ | |
6896 | for (; b; b = b->level_chain) | |
6897 | { | |
6898 | tree t; | |
6899 | ||
6900 | /* Template IDs are inserted into the global level. If they were | |
6901 | inserted into namespace level, finish_file wouldn't find them | |
6902 | when doing pending instantiations. Therefore, don't stop at | |
6903 | namespace level, but continue until :: . */ | |
c353b8e3 | 6904 | if (global_scope_p (b)) |
00e8de68 GDR |
6905 | break; |
6906 | ||
f44b0c8e | 6907 | store_bindings (b->names, &s->old_bindings); |
00e8de68 GDR |
6908 | /* We also need to check class_shadowed to save class-level type |
6909 | bindings, since pushclass doesn't fill in b->names. */ | |
6910 | if (b->kind == sk_class) | |
f44b0c8e | 6911 | store_class_bindings (b->class_shadowed, &s->old_bindings); |
00e8de68 GDR |
6912 | |
6913 | /* Unwind type-value slots back to top level. */ | |
6914 | for (t = b->type_shadowed; t; t = TREE_CHAIN (t)) | |
6915 | SET_IDENTIFIER_TYPE_VALUE (TREE_PURPOSE (t), TREE_VALUE (t)); | |
6916 | } | |
f44b0c8e | 6917 | |
9771b263 | 6918 | FOR_EACH_VEC_SAFE_ELT (s->old_bindings, i, sb) |
f44b0c8e MM |
6919 | IDENTIFIER_MARKED (sb->identifier) = 0; |
6920 | ||
00e8de68 | 6921 | s->prev = scope_chain; |
00e8de68 GDR |
6922 | s->bindings = b; |
6923 | s->need_pop_function_context = need_pop; | |
6924 | s->function_decl = current_function_decl; | |
7d882b83 ILT |
6925 | s->unevaluated_operand = cp_unevaluated_operand; |
6926 | s->inhibit_evaluation_warnings = c_inhibit_evaluation_warnings; | |
04f7a48e | 6927 | s->x_stmt_tree.stmts_are_full_exprs_p = true; |
00e8de68 GDR |
6928 | |
6929 | scope_chain = s; | |
6930 | current_function_decl = NULL_TREE; | |
9771b263 | 6931 | vec_alloc (current_lang_base, 10); |
00e8de68 GDR |
6932 | current_lang_name = lang_name_cplusplus; |
6933 | current_namespace = global_namespace; | |
c888c93b | 6934 | push_class_stack (); |
7d882b83 ILT |
6935 | cp_unevaluated_operand = 0; |
6936 | c_inhibit_evaluation_warnings = 0; | |
00e8de68 GDR |
6937 | } |
6938 | ||
575bfb00 | 6939 | static void |
c405923d | 6940 | do_pop_from_top_level (void) |
00e8de68 GDR |
6941 | { |
6942 | struct saved_scope *s = scope_chain; | |
6943 | cxx_saved_binding *saved; | |
f44b0c8e | 6944 | size_t i; |
00e8de68 | 6945 | |
00e8de68 | 6946 | /* Clear out class-level bindings cache. */ |
89b578be | 6947 | if (previous_class_level) |
00e8de68 | 6948 | invalidate_class_lookup_cache (); |
c888c93b | 6949 | pop_class_stack (); |
00e8de68 GDR |
6950 | |
6951 | current_lang_base = 0; | |
6952 | ||
6953 | scope_chain = s->prev; | |
9771b263 | 6954 | FOR_EACH_VEC_SAFE_ELT (s->old_bindings, i, saved) |
00e8de68 GDR |
6955 | { |
6956 | tree id = saved->identifier; | |
6957 | ||
6958 | IDENTIFIER_BINDING (id) = saved->binding; | |
00e8de68 GDR |
6959 | SET_IDENTIFIER_TYPE_VALUE (id, saved->real_type_value); |
6960 | } | |
6961 | ||
6962 | /* If we were in the middle of compiling a function, restore our | |
6963 | state. */ | |
6964 | if (s->need_pop_function_context) | |
d2784db4 | 6965 | pop_function_context (); |
00e8de68 | 6966 | current_function_decl = s->function_decl; |
7d882b83 ILT |
6967 | cp_unevaluated_operand = s->unevaluated_operand; |
6968 | c_inhibit_evaluation_warnings = s->inhibit_evaluation_warnings; | |
5c712250 PP |
6969 | |
6970 | /* Make this saved_scope structure available for reuse by | |
6971 | push_to_top_level. */ | |
6972 | s->prev = free_saved_scope; | |
6973 | free_saved_scope = s; | |
00e8de68 GDR |
6974 | } |
6975 | ||
c405923d NS |
6976 | /* Push into the scope of the namespace NS, even if it is deeply |
6977 | nested within another namespace. */ | |
575bfb00 | 6978 | |
c405923d NS |
6979 | static void |
6980 | do_push_nested_namespace (tree ns) | |
6981 | { | |
6982 | if (ns == global_namespace) | |
6983 | do_push_to_top_level (); | |
6984 | else | |
6985 | { | |
6986 | do_push_nested_namespace (CP_DECL_CONTEXT (ns)); | |
6987 | gcc_checking_assert | |
e833f686 | 6988 | (find_namespace_value (current_namespace, DECL_NAME (ns)) == ns); |
c405923d NS |
6989 | resume_scope (NAMESPACE_LEVEL (ns)); |
6990 | current_namespace = ns; | |
6991 | } | |
6992 | } | |
6993 | ||
6994 | /* Pop back from the scope of the namespace NS, which was previously | |
6995 | entered with push_nested_namespace. */ | |
6996 | ||
6997 | static void | |
6998 | do_pop_nested_namespace (tree ns) | |
6999 | { | |
7000 | while (ns != global_namespace) | |
7001 | { | |
7002 | ns = CP_DECL_CONTEXT (ns); | |
7003 | current_namespace = ns; | |
7004 | leave_scope (); | |
7005 | } | |
7006 | ||
7007 | do_pop_from_top_level (); | |
7008 | } | |
7009 | ||
44e00a7a NS |
7010 | /* Add TARGET to USINGS, if it does not already exist there. |
7011 | We used to build the complete graph of usings at this point, from | |
7012 | the POV of the source namespaces. Now we build that as we perform | |
7013 | the unqualified search. */ | |
65cc1407 NS |
7014 | |
7015 | static void | |
3c9feefc | 7016 | add_using_namespace (vec<tree, va_gc> *&usings, tree target) |
65cc1407 | 7017 | { |
3c9feefc NS |
7018 | if (usings) |
7019 | for (unsigned ix = usings->length (); ix--;) | |
7020 | if ((*usings)[ix] == target) | |
7021 | return; | |
65cc1407 | 7022 | |
3c9feefc | 7023 | vec_safe_push (usings, target); |
65cc1407 NS |
7024 | } |
7025 | ||
44e00a7a | 7026 | /* Tell the debug system of a using directive. */ |
65cc1407 NS |
7027 | |
7028 | static void | |
e071b767 | 7029 | emit_debug_info_using_namespace (tree from, tree target, bool implicit) |
65cc1407 | 7030 | { |
44e00a7a NS |
7031 | /* Emit debugging info. */ |
7032 | tree context = from != global_namespace ? from : NULL_TREE; | |
e071b767 JJ |
7033 | debug_hooks->imported_module_or_decl (target, NULL_TREE, context, false, |
7034 | implicit); | |
65cc1407 NS |
7035 | } |
7036 | ||
7037 | /* Process a namespace-scope using directive. */ | |
7038 | ||
7039 | void | |
7040 | finish_namespace_using_directive (tree target, tree attribs) | |
7041 | { | |
7042 | gcc_checking_assert (namespace_bindings_p ()); | |
7043 | if (target == error_mark_node) | |
7044 | return; | |
7045 | ||
44e00a7a | 7046 | add_using_namespace (DECL_NAMESPACE_USING (current_namespace), |
65cc1407 | 7047 | ORIGINAL_NAMESPACE (target)); |
44e00a7a | 7048 | emit_debug_info_using_namespace (current_namespace, |
e071b767 | 7049 | ORIGINAL_NAMESPACE (target), false); |
65cc1407 NS |
7050 | |
7051 | if (attribs == error_mark_node) | |
7052 | return; | |
7053 | ||
7054 | for (tree a = attribs; a; a = TREE_CHAIN (a)) | |
7055 | { | |
7056 | tree name = get_attribute_name (a); | |
7057 | if (is_attribute_p ("strong", name)) | |
7058 | { | |
7059 | warning (0, "strong using directive no longer supported"); | |
7060 | if (CP_DECL_CONTEXT (target) == current_namespace) | |
7061 | inform (DECL_SOURCE_LOCATION (target), | |
7062 | "you may use an inline namespace instead"); | |
7063 | } | |
7064 | else | |
7065 | warning (OPT_Wattributes, "%qD attribute directive ignored", name); | |
7066 | } | |
7067 | } | |
7068 | ||
7069 | /* Process a function-scope using-directive. */ | |
7070 | ||
7071 | void | |
7072 | finish_local_using_directive (tree target, tree attribs) | |
7073 | { | |
7074 | gcc_checking_assert (local_bindings_p ()); | |
7075 | if (target == error_mark_node) | |
7076 | return; | |
7077 | ||
7078 | if (attribs) | |
7079 | warning (OPT_Wattributes, "attributes ignored on local using directive"); | |
7080 | ||
7081 | add_stmt (build_stmt (input_location, USING_STMT, target)); | |
7082 | ||
44e00a7a NS |
7083 | add_using_namespace (current_binding_level->using_directives, |
7084 | ORIGINAL_NAMESPACE (target)); | |
65cc1407 NS |
7085 | } |
7086 | ||
c405923d NS |
7087 | /* Pushes X into the global namespace. */ |
7088 | ||
7089 | tree | |
7090 | pushdecl_top_level (tree x, bool is_friend) | |
575bfb00 LC |
7091 | { |
7092 | bool subtime = timevar_cond_start (TV_NAME_LOOKUP); | |
c405923d NS |
7093 | do_push_to_top_level (); |
7094 | x = pushdecl_namespace_level (x, is_friend); | |
7095 | do_pop_from_top_level (); | |
575bfb00 | 7096 | timevar_cond_stop (TV_NAME_LOOKUP, subtime); |
c405923d NS |
7097 | return x; |
7098 | } | |
7099 | ||
7100 | /* Pushes X into the global namespace and calls cp_finish_decl to | |
7101 | register the variable, initializing it with INIT. */ | |
7102 | ||
7103 | tree | |
7104 | pushdecl_top_level_and_finish (tree x, tree init) | |
7105 | { | |
7106 | bool subtime = timevar_cond_start (TV_NAME_LOOKUP); | |
7107 | do_push_to_top_level (); | |
7108 | x = pushdecl_namespace_level (x, false); | |
7109 | cp_finish_decl (x, init, false, NULL_TREE, 0); | |
7110 | do_pop_from_top_level (); | |
7111 | timevar_cond_stop (TV_NAME_LOOKUP, subtime); | |
7112 | return x; | |
575bfb00 LC |
7113 | } |
7114 | ||
945bf9e1 NS |
7115 | /* Enter the namespaces from current_namerspace to NS. */ |
7116 | ||
7117 | static int | |
7118 | push_inline_namespaces (tree ns) | |
7119 | { | |
7120 | int count = 0; | |
7121 | if (ns != current_namespace) | |
7122 | { | |
7123 | gcc_assert (ns != global_namespace); | |
7124 | count += push_inline_namespaces (CP_DECL_CONTEXT (ns)); | |
7125 | resume_scope (NAMESPACE_LEVEL (ns)); | |
7126 | current_namespace = ns; | |
7127 | count++; | |
7128 | } | |
7129 | return count; | |
7130 | } | |
7131 | ||
3a77e7cc NS |
7132 | /* Push into the scope of the NAME namespace. If NAME is NULL_TREE, |
7133 | then we enter an anonymous namespace. If MAKE_INLINE is true, then | |
7134 | we create an inline namespace (it is up to the caller to check upon | |
7135 | redefinition). Return the number of namespaces entered. */ | |
b655c310 | 7136 | |
3a77e7cc NS |
7137 | int |
7138 | push_namespace (tree name, bool make_inline) | |
b655c310 | 7139 | { |
b655c310 | 7140 | bool subtime = timevar_cond_start (TV_NAME_LOOKUP); |
3a77e7cc | 7141 | int count = 0; |
b655c310 NS |
7142 | |
7143 | /* We should not get here if the global_namespace is not yet constructed | |
7144 | nor if NAME designates the global namespace: The global scope is | |
7145 | constructed elsewhere. */ | |
e833f686 | 7146 | gcc_checking_assert (global_namespace != NULL && name != global_identifier); |
3a77e7cc | 7147 | |
945bf9e1 NS |
7148 | tree ns = NULL_TREE; |
7149 | { | |
7150 | name_lookup lookup (name, 0); | |
7151 | if (!lookup.search_qualified (current_namespace, /*usings=*/false)) | |
7152 | ; | |
7153 | else if (TREE_CODE (lookup.value) != NAMESPACE_DECL) | |
7154 | ; | |
7155 | else if (tree dna = DECL_NAMESPACE_ALIAS (lookup.value)) | |
7156 | { | |
7157 | /* A namespace alias is not allowed here, but if the alias | |
7158 | is for a namespace also inside the current scope, | |
7159 | accept it with a diagnostic. That's better than dying | |
7160 | horribly. */ | |
7161 | if (is_nested_namespace (current_namespace, CP_DECL_CONTEXT (dna))) | |
7162 | { | |
7163 | error ("namespace alias %qD not allowed here, " | |
7164 | "assuming %qD", lookup.value, dna); | |
7165 | ns = dna; | |
7166 | } | |
7167 | } | |
7168 | else | |
7169 | ns = lookup.value; | |
7170 | } | |
b655c310 | 7171 | |
3a77e7cc | 7172 | bool new_ns = false; |
945bf9e1 NS |
7173 | if (ns) |
7174 | /* DR2061. NS might be a member of an inline namespace. We | |
7175 | need to push into those namespaces. */ | |
7176 | count += push_inline_namespaces (CP_DECL_CONTEXT (ns)); | |
7177 | else | |
b655c310 | 7178 | { |
3a77e7cc | 7179 | ns = build_lang_decl (NAMESPACE_DECL, name, void_type_node); |
322763f5 NS |
7180 | SCOPE_DEPTH (ns) = SCOPE_DEPTH (current_namespace) + 1; |
7181 | if (!SCOPE_DEPTH (ns)) | |
7182 | /* We only allow depth 255. */ | |
7183 | sorry ("cannot nest more than %d namespaces", | |
7184 | SCOPE_DEPTH (current_namespace)); | |
3a77e7cc NS |
7185 | DECL_CONTEXT (ns) = FROB_CONTEXT (current_namespace); |
7186 | new_ns = true; | |
7187 | ||
7188 | if (pushdecl (ns) == error_mark_node) | |
7189 | ns = NULL_TREE; | |
b655c310 | 7190 | else |
b655c310 | 7191 | { |
e833f686 | 7192 | if (!name) |
3a77e7cc | 7193 | { |
e833f686 | 7194 | SET_DECL_ASSEMBLER_NAME (ns, anon_identifier); |
3a77e7cc NS |
7195 | |
7196 | if (!make_inline) | |
44e00a7a NS |
7197 | add_using_namespace (DECL_NAMESPACE_USING (current_namespace), |
7198 | ns); | |
3a77e7cc NS |
7199 | } |
7200 | else if (TREE_PUBLIC (current_namespace)) | |
7201 | TREE_PUBLIC (ns) = 1; | |
7202 | ||
7203 | if (make_inline) | |
3c9feefc NS |
7204 | { |
7205 | DECL_NAMESPACE_INLINE_P (ns) = true; | |
7206 | vec_safe_push (DECL_NAMESPACE_INLINEES (current_namespace), ns); | |
7207 | } | |
e071b767 | 7208 | |
e833f686 | 7209 | if (!name || make_inline) |
e071b767 | 7210 | emit_debug_info_using_namespace (current_namespace, ns, true); |
b655c310 | 7211 | } |
3a77e7cc NS |
7212 | } |
7213 | ||
7214 | if (ns) | |
7215 | { | |
7216 | if (make_inline && !DECL_NAMESPACE_INLINE_P (ns)) | |
b655c310 | 7217 | { |
3a77e7cc NS |
7218 | error ("inline namespace must be specified at initial definition"); |
7219 | inform (DECL_SOURCE_LOCATION (ns), "%qD defined here", ns); | |
b655c310 | 7220 | } |
3a77e7cc NS |
7221 | if (new_ns) |
7222 | begin_scope (sk_namespace, ns); | |
7223 | else | |
7224 | resume_scope (NAMESPACE_LEVEL (ns)); | |
7225 | current_namespace = ns; | |
7226 | count++; | |
b655c310 | 7227 | } |
b655c310 NS |
7228 | |
7229 | timevar_cond_stop (TV_NAME_LOOKUP, subtime); | |
3a77e7cc | 7230 | return count; |
b655c310 NS |
7231 | } |
7232 | ||
7233 | /* Pop from the scope of the current namespace. */ | |
7234 | ||
7235 | void | |
7236 | pop_namespace (void) | |
7237 | { | |
3c9feefc NS |
7238 | bool subtime = timevar_cond_start (TV_NAME_LOOKUP); |
7239 | ||
b655c310 NS |
7240 | gcc_assert (current_namespace != global_namespace); |
7241 | current_namespace = CP_DECL_CONTEXT (current_namespace); | |
7242 | /* The binding level is not popped, as it might be re-opened later. */ | |
7243 | leave_scope (); | |
3c9feefc NS |
7244 | |
7245 | timevar_cond_stop (TV_NAME_LOOKUP, subtime); | |
b655c310 NS |
7246 | } |
7247 | ||
c405923d | 7248 | /* External entry points for do_{push_to/pop_from}_top_level. */ |
b655c310 NS |
7249 | |
7250 | void | |
c405923d | 7251 | push_to_top_level (void) |
b655c310 | 7252 | { |
c405923d NS |
7253 | bool subtime = timevar_cond_start (TV_NAME_LOOKUP); |
7254 | do_push_to_top_level (); | |
7255 | timevar_cond_stop (TV_NAME_LOOKUP, subtime); | |
b655c310 NS |
7256 | } |
7257 | ||
c405923d NS |
7258 | void |
7259 | pop_from_top_level (void) | |
7260 | { | |
7261 | bool subtime = timevar_cond_start (TV_NAME_LOOKUP); | |
7262 | do_pop_from_top_level (); | |
7263 | timevar_cond_stop (TV_NAME_LOOKUP, subtime); | |
7264 | } | |
7265 | ||
7266 | /* External entry points for do_{push,pop}_nested_namespace. */ | |
7267 | ||
7268 | void | |
7269 | push_nested_namespace (tree ns) | |
7270 | { | |
7271 | bool subtime = timevar_cond_start (TV_NAME_LOOKUP); | |
7272 | do_push_nested_namespace (ns); | |
7273 | timevar_cond_stop (TV_NAME_LOOKUP, subtime); | |
7274 | } | |
b655c310 NS |
7275 | |
7276 | void | |
7277 | pop_nested_namespace (tree ns) | |
7278 | { | |
7279 | bool subtime = timevar_cond_start (TV_NAME_LOOKUP); | |
7280 | gcc_assert (current_namespace == ns); | |
c405923d | 7281 | do_pop_nested_namespace (ns); |
b655c310 NS |
7282 | timevar_cond_stop (TV_NAME_LOOKUP, subtime); |
7283 | } | |
575bfb00 | 7284 | |
00e8de68 | 7285 | /* Pop off extraneous binding levels left over due to syntax errors. |
00e8de68 GDR |
7286 | We don't pop past namespaces, as they might be valid. */ |
7287 | ||
7288 | void | |
7289 | pop_everything (void) | |
7290 | { | |
7291 | if (ENABLE_SCOPE_CHECKING) | |
7292 | verbatim ("XXX entering pop_everything ()\n"); | |
056a17ee | 7293 | while (!namespace_bindings_p ()) |
00e8de68 GDR |
7294 | { |
7295 | if (current_binding_level->kind == sk_class) | |
7296 | pop_nested_class (); | |
7297 | else | |
7298 | poplevel (0, 0, 0); | |
7299 | } | |
7300 | if (ENABLE_SCOPE_CHECKING) | |
7301 | verbatim ("XXX leaving pop_everything ()\n"); | |
7302 | } | |
7303 | ||
6097b0c3 | 7304 | /* Emit debugging information for using declarations and directives. |
c8094d83 | 7305 | If input tree is overloaded fn then emit debug info for all |
6097b0c3 DP |
7306 | candidates. */ |
7307 | ||
98ed9dae | 7308 | void |
6097b0c3 DP |
7309 | cp_emit_debug_info_for_using (tree t, tree context) |
7310 | { | |
099f36ab | 7311 | /* Don't try to emit any debug information if we have errors. */ |
1da2ed5f | 7312 | if (seen_error ()) |
099f36ab JM |
7313 | return; |
7314 | ||
c8094d83 | 7315 | /* Ignore this FUNCTION_DECL if it refers to a builtin declaration |
6097b0c3 | 7316 | of a builtin function. */ |
c8094d83 | 7317 | if (TREE_CODE (t) == FUNCTION_DECL |
6097b0c3 DP |
7318 | && DECL_EXTERNAL (t) |
7319 | && DECL_BUILT_IN (t)) | |
7320 | return; | |
7321 | ||
7322 | /* Do not supply context to imported_module_or_decl, if | |
7323 | it is a global namespace. */ | |
7324 | if (context == global_namespace) | |
7325 | context = NULL_TREE; | |
c8094d83 | 7326 | |
e1cad930 | 7327 | t = MAYBE_BASELINK_FUNCTIONS (t); |
c8094d83 | 7328 | |
6097b0c3 | 7329 | /* FIXME: Handle TEMPLATE_DECLs. */ |
87c976ae NS |
7330 | for (lkp_iterator iter (t); iter; ++iter) |
7331 | { | |
7332 | tree fn = *iter; | |
7333 | if (TREE_CODE (fn) != TEMPLATE_DECL) | |
7334 | { | |
7335 | if (building_stmt_list_p ()) | |
7336 | add_stmt (build_stmt (input_location, USING_STMT, fn)); | |
7337 | else | |
e071b767 JJ |
7338 | debug_hooks->imported_module_or_decl (fn, NULL_TREE, context, |
7339 | false, false); | |
87c976ae NS |
7340 | } |
7341 | } | |
98ed9dae | 7342 | } |
6097b0c3 | 7343 | |
28ea4c88 | 7344 | #include "gt-cp-name-lookup.h" |