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8546e572 | 1 | /* Definitions for C++ name lookup routines. |
aad93da1 | 2 | Copyright (C) 2003-2017 Free Software Foundation, Inc. |
8546e572 | 3 | Contributed by Gabriel Dos Reis <gdr@integrable-solutions.net> |
4 | ||
d36ac936 | 5 | This file is part of GCC. |
8546e572 | 6 | |
d36ac936 | 7 | GCC is free software; you can redistribute it and/or modify |
8546e572 | 8 | it under the terms of the GNU General Public License as published by |
aa139c3f | 9 | the Free Software Foundation; either version 3, or (at your option) |
8546e572 | 10 | any later version. |
11 | ||
d36ac936 | 12 | GCC is distributed in the hope that it will be useful, |
8546e572 | 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 | |
aa139c3f | 18 | along with GCC; see the file COPYING3. If not see |
19 | <http://www.gnu.org/licenses/>. */ | |
8546e572 | 20 | |
21 | #include "config.h" | |
22 | #include "system.h" | |
23 | #include "coretypes.h" | |
4cba6f60 | 24 | #include "cp-tree.h" |
25 | #include "timevar.h" | |
9ed99284 | 26 | #include "stringpool.h" |
27 | #include "print-tree.h" | |
28 | #include "attribs.h" | |
2b49746a | 29 | #include "debug.h" |
7bedc3a0 | 30 | #include "c-family/c-pragma.h" |
f91726b4 | 31 | #include "params.h" |
24acd4ab | 32 | #include "gcc-rich-location.h" |
33 | #include "spellcheck-tree.h" | |
34 | #include "parser.h" | |
836495aa | 35 | |
4fd9bd13 | 36 | static cxx_binding *cxx_binding_make (tree value, tree type); |
37 | static cp_binding_level *innermost_nonclass_level (void); | |
38 | static void set_identifier_type_value_with_scope (tree id, tree decl, | |
39 | cp_binding_level *b); | |
7d6057da | 40 | |
17d66324 | 41 | /* Create an overload suitable for recording an artificial TYPE_DECL |
42 | and another decl. We use this machanism to implement the struct | |
43 | stat hack within a namespace. It'd be nice to use it everywhere. */ | |
44 | ||
45 | #define STAT_HACK_P(N) ((N) && TREE_CODE (N) == OVERLOAD && OVL_LOOKUP_P (N)) | |
46 | #define STAT_TYPE(N) TREE_TYPE (N) | |
47 | #define STAT_DECL(N) OVL_FUNCTION (N) | |
48 | #define MAYBE_STAT_DECL(N) (STAT_HACK_P (N) ? STAT_DECL (N) : N) | |
49 | #define MAYBE_STAT_TYPE(N) (STAT_HACK_P (N) ? STAT_TYPE (N) : NULL_TREE) | |
50 | ||
6fbf0ce6 | 51 | /* Create a STAT_HACK node with DECL as the value binding and TYPE as |
52 | the type binding. */ | |
53 | ||
54 | static tree | |
55 | stat_hack (tree decl = NULL_TREE, tree type = NULL_TREE) | |
17d66324 | 56 | { |
57 | tree result = make_node (OVERLOAD); | |
58 | ||
59 | /* Mark this as a lookup, so we can tell this is a stat hack. */ | |
60 | OVL_LOOKUP_P (result) = true; | |
61 | STAT_DECL (result) = decl; | |
62 | STAT_TYPE (result) = type; | |
63 | return result; | |
64 | } | |
65 | ||
bba28d3f | 66 | /* Create a local binding level for NAME. */ |
67 | ||
68 | static cxx_binding * | |
69 | create_local_binding (cp_binding_level *level, tree name) | |
70 | { | |
71 | cxx_binding *binding = cxx_binding_make (NULL, NULL); | |
72 | ||
73 | INHERITED_VALUE_BINDING_P (binding) = false; | |
74 | LOCAL_BINDING_P (binding) = true; | |
75 | binding->scope = level; | |
76 | binding->previous = IDENTIFIER_BINDING (name); | |
77 | ||
78 | IDENTIFIER_BINDING (name) = binding; | |
79 | ||
80 | return binding; | |
81 | } | |
82 | ||
76794ade | 83 | /* Find the binding for NAME in namespace NS. If CREATE_P is true, |
84 | make an empty binding if there wasn't one. */ | |
85 | ||
17d66324 | 86 | static tree * |
87 | find_namespace_slot (tree ns, tree name, bool create_p = false) | |
76794ade | 88 | { |
1458d1aa | 89 | tree *slot; |
76794ade | 90 | |
91 | if (create_p) | |
92 | { | |
1458d1aa | 93 | bool existed; |
94 | slot = &DECL_NAMESPACE_BINDINGS (ns)->get_or_insert (name, &existed); | |
95 | if (!existed) | |
96 | *slot = NULL_TREE; | |
76794ade | 97 | } |
1458d1aa | 98 | else |
99 | slot = DECL_NAMESPACE_BINDINGS (ns)->get (name); | |
100 | return slot; | |
17d66324 | 101 | } |
102 | ||
103 | static tree | |
104 | find_namespace_value (tree ns, tree name) | |
105 | { | |
106 | tree *b = find_namespace_slot (ns, name); | |
107 | ||
108 | return b ? MAYBE_STAT_DECL (*b) : NULL_TREE; | |
76794ade | 109 | } |
110 | ||
4fd9bd13 | 111 | /* Add DECL to the list of things declared in B. */ |
db85cc4f | 112 | |
4fd9bd13 | 113 | static void |
eb9d4ee4 | 114 | add_decl_to_level (cp_binding_level *b, tree decl) |
db85cc4f | 115 | { |
d6cc2ec2 | 116 | gcc_assert (b->kind != sk_class); |
4fd9bd13 | 117 | |
f7564df4 | 118 | /* Make sure we don't create a circular list. xref_tag can end |
119 | up pushing the same artificial decl more than once. We | |
120 | should have already detected that in update_binding. */ | |
121 | gcc_assert (b->names != decl); | |
122 | ||
123 | /* We build up the list in reverse order, and reverse it later if | |
124 | necessary. */ | |
125 | TREE_CHAIN (decl) = b->names; | |
126 | b->names = decl; | |
127 | ||
128 | /* If appropriate, add decl to separate list of statics. We | |
129 | include extern variables because they might turn out to be | |
130 | static later. It's OK for this list to contain a few false | |
131 | positives. */ | |
132 | if (b->kind == sk_namespace | |
133 | && ((VAR_P (decl) | |
134 | && (TREE_STATIC (decl) || DECL_EXTERNAL (decl))) | |
135 | || (TREE_CODE (decl) == FUNCTION_DECL | |
136 | && (!TREE_PUBLIC (decl) | |
137 | || decl_anon_ns_mem_p (decl) | |
138 | || DECL_DECLARED_INLINE_P (decl))))) | |
139 | vec_safe_push (static_decls, decl); | |
4fd9bd13 | 140 | } |
0e1d7e20 | 141 | |
8a864c4b | 142 | /* Find the binding for NAME in the local binding level B. */ |
143 | ||
144 | static cxx_binding * | |
145 | find_local_binding (cp_binding_level *b, tree name) | |
146 | { | |
147 | if (cxx_binding *binding = IDENTIFIER_BINDING (name)) | |
148 | for (;; b = b->level_chain) | |
149 | { | |
150 | if (binding->scope == b | |
151 | && !(VAR_P (binding->value) | |
152 | && DECL_DEAD_FOR_LOCAL (binding->value))) | |
153 | return binding; | |
154 | ||
155 | /* Cleanup contours are transparent to the language. */ | |
156 | if (b->kind != sk_cleanup) | |
157 | break; | |
158 | } | |
159 | return NULL; | |
160 | } | |
161 | ||
69232621 | 162 | struct name_lookup |
4fd9bd13 | 163 | { |
9ff63f75 | 164 | public: |
165 | typedef std::pair<tree, tree> using_pair; | |
166 | typedef vec<using_pair, va_heap, vl_embed> using_queue; | |
167 | ||
69232621 | 168 | public: |
169 | tree name; /* The identifier being looked for. */ | |
170 | tree value; /* A (possibly ambiguous) set of things found. */ | |
171 | tree type; /* A type that has been found. */ | |
421bfc0f | 172 | int flags; /* Lookup flags. */ |
6fbf0ce6 | 173 | bool deduping; /* Full deduping is needed because using declarations |
174 | are in play. */ | |
69232621 | 175 | vec<tree, va_heap, vl_embed> *scopes; |
176 | name_lookup *previous; /* Previously active lookup. */ | |
69232621 | 177 | |
178 | protected: | |
179 | /* Marked scope stack for outermost name lookup. */ | |
180 | static vec<tree, va_heap, vl_embed> *shared_scopes; | |
181 | /* Currently active lookup. */ | |
182 | static name_lookup *active; | |
183 | ||
184 | public: | |
421bfc0f | 185 | name_lookup (tree n, int f = 0) |
186 | : name (n), value (NULL_TREE), type (NULL_TREE), flags (f), | |
6fbf0ce6 | 187 | deduping (false), scopes (NULL), previous (NULL) |
69232621 | 188 | { |
189 | preserve_state (); | |
190 | } | |
191 | ~name_lookup () | |
192 | { | |
69232621 | 193 | restore_state (); |
194 | } | |
195 | ||
196 | private: /* Uncopyable, unmovable, unassignable. I am a rock. */ | |
197 | name_lookup (const name_lookup &); | |
198 | name_lookup &operator= (const name_lookup &); | |
199 | ||
200 | protected: | |
201 | static bool seen_p (tree scope) | |
202 | { | |
203 | return LOOKUP_SEEN_P (scope); | |
204 | } | |
205 | static bool found_p (tree scope) | |
206 | { | |
207 | return LOOKUP_FOUND_P (scope); | |
208 | } | |
209 | ||
210 | void mark_seen (tree scope); /* Mark and add to scope vector. */ | |
211 | static void mark_found (tree scope) | |
212 | { | |
213 | gcc_checking_assert (seen_p (scope)); | |
214 | LOOKUP_FOUND_P (scope) = true; | |
215 | } | |
216 | bool see_and_mark (tree scope) | |
217 | { | |
218 | bool ret = seen_p (scope); | |
219 | if (!ret) | |
220 | mark_seen (scope); | |
221 | return ret; | |
222 | } | |
223 | bool find_and_mark (tree scope); | |
224 | ||
225 | private: | |
226 | void preserve_state (); | |
227 | void restore_state (); | |
228 | ||
421bfc0f | 229 | private: |
230 | static tree ambiguous (tree thing, tree current); | |
6fbf0ce6 | 231 | void add_overload (tree fns); |
421bfc0f | 232 | void add_value (tree new_val); |
233 | void add_type (tree new_type); | |
234 | bool process_binding (tree val_bind, tree type_bind); | |
235 | ||
236 | /* Look in only namespace. */ | |
237 | bool search_namespace_only (tree scope); | |
238 | /* Look in namespace and its (recursive) inlines. Ignore using | |
239 | directives. Return true if something found (inc dups). */ | |
240 | bool search_namespace (tree scope); | |
241 | /* Look in the using directives of namespace + inlines using | |
242 | qualified lookup rules. */ | |
243 | bool search_usings (tree scope); | |
244 | ||
9ff63f75 | 245 | private: |
246 | using_queue *queue_namespace (using_queue *queue, int depth, tree scope); | |
0a2455c5 | 247 | using_queue *do_queue_usings (using_queue *queue, int depth, |
248 | vec<tree, va_gc> *usings); | |
249 | using_queue *queue_usings (using_queue *queue, int depth, | |
250 | vec<tree, va_gc> *usings) | |
9ff63f75 | 251 | { |
252 | if (usings) | |
253 | queue = do_queue_usings (queue, depth, usings); | |
254 | return queue; | |
255 | } | |
256 | ||
421bfc0f | 257 | private: |
69232621 | 258 | void add_fns (tree); |
259 | ||
260 | void adl_expr (tree); | |
261 | void adl_type (tree); | |
262 | void adl_template_arg (tree); | |
263 | void adl_class (tree); | |
264 | void adl_bases (tree); | |
265 | void adl_class_only (tree); | |
266 | void adl_namespace (tree); | |
267 | void adl_namespace_only (tree); | |
268 | ||
269 | public: | |
421bfc0f | 270 | /* Search namespace + inlines + maybe usings as qualified lookup. */ |
271 | bool search_qualified (tree scope, bool usings = true); | |
272 | ||
9ff63f75 | 273 | /* Search namespace + inlines + usings as unqualified lookup. */ |
274 | bool search_unqualified (tree scope, cp_binding_level *); | |
275 | ||
421bfc0f | 276 | /* ADL lookup of ARGS. */ |
69232621 | 277 | tree search_adl (tree fns, vec<tree, va_gc> *args); |
4fd9bd13 | 278 | }; |
37af486a | 279 | |
69232621 | 280 | /* Scope stack shared by all outermost lookups. This avoids us |
281 | allocating and freeing on every single lookup. */ | |
282 | vec<tree, va_heap, vl_embed> *name_lookup::shared_scopes; | |
37af486a | 283 | |
69232621 | 284 | /* Currently active lookup. */ |
285 | name_lookup *name_lookup::active; | |
286 | ||
287 | /* Name lookup is recursive, becase ADL can cause template | |
288 | instatiation. This is of course a rare event, so we optimize for | |
289 | it not happening. When we discover an active name-lookup, which | |
290 | must be an ADL lookup, we need to unmark the marked scopes and also | |
291 | unmark the lookup we might have been accumulating. */ | |
292 | ||
293 | void | |
294 | name_lookup::preserve_state () | |
37af486a | 295 | { |
69232621 | 296 | previous = active; |
297 | if (previous) | |
298 | { | |
299 | unsigned length = vec_safe_length (previous->scopes); | |
300 | vec_safe_reserve (previous->scopes, length * 2); | |
301 | for (unsigned ix = length; ix--;) | |
302 | { | |
303 | tree decl = (*previous->scopes)[ix]; | |
304 | ||
305 | gcc_checking_assert (LOOKUP_SEEN_P (decl)); | |
306 | LOOKUP_SEEN_P (decl) = false; | |
307 | ||
308 | /* Preserve the FOUND_P state on the interrupted lookup's | |
309 | stack. */ | |
310 | if (LOOKUP_FOUND_P (decl)) | |
311 | { | |
312 | LOOKUP_FOUND_P (decl) = false; | |
313 | previous->scopes->quick_push (decl); | |
314 | } | |
315 | } | |
41ff145b | 316 | |
317 | /* Unmark the outer partial lookup. */ | |
6fbf0ce6 | 318 | if (previous->deduping) |
319 | lookup_mark (previous->value, false); | |
69232621 | 320 | } |
4fd9bd13 | 321 | else |
69232621 | 322 | scopes = shared_scopes; |
323 | active = this; | |
37af486a | 324 | } |
325 | ||
69232621 | 326 | /* Restore the marking state of a lookup we interrupted. */ |
0e1d7e20 | 327 | |
69232621 | 328 | void |
329 | name_lookup::restore_state () | |
af694375 | 330 | { |
6fbf0ce6 | 331 | if (deduping) |
332 | lookup_mark (value, false); | |
333 | ||
69232621 | 334 | /* Unmark and empty this lookup's scope stack. */ |
335 | for (unsigned ix = vec_safe_length (scopes); ix--;) | |
336 | { | |
337 | tree decl = scopes->pop (); | |
338 | gcc_checking_assert (LOOKUP_SEEN_P (decl)); | |
339 | LOOKUP_SEEN_P (decl) = false; | |
340 | LOOKUP_FOUND_P (decl) = false; | |
341 | } | |
af694375 | 342 | |
69232621 | 343 | active = previous; |
344 | if (previous) | |
af694375 | 345 | { |
41ff145b | 346 | free (scopes); |
347 | ||
69232621 | 348 | unsigned length = vec_safe_length (previous->scopes); |
349 | for (unsigned ix = 0; ix != length; ix++) | |
4fd9bd13 | 350 | { |
69232621 | 351 | tree decl = (*previous->scopes)[ix]; |
352 | if (LOOKUP_SEEN_P (decl)) | |
353 | { | |
354 | /* The remainder of the scope stack must be recording | |
355 | FOUND_P decls, which we want to pop off. */ | |
356 | do | |
357 | { | |
358 | tree decl = previous->scopes->pop (); | |
359 | gcc_checking_assert (LOOKUP_SEEN_P (decl) | |
360 | && !LOOKUP_FOUND_P (decl)); | |
361 | LOOKUP_FOUND_P (decl) = true; | |
362 | } | |
363 | while (++ix != length); | |
364 | break; | |
365 | } | |
366 | ||
367 | gcc_checking_assert (!LOOKUP_FOUND_P (decl)); | |
368 | LOOKUP_SEEN_P (decl) = true; | |
4fd9bd13 | 369 | } |
af694375 | 370 | |
41ff145b | 371 | /* Remark the outer partial lookup. */ |
6fbf0ce6 | 372 | if (previous->deduping) |
373 | lookup_mark (previous->value, true); | |
69232621 | 374 | } |
375 | else | |
376 | shared_scopes = scopes; | |
af694375 | 377 | } |
af694375 | 378 | |
69232621 | 379 | void |
380 | name_lookup::mark_seen (tree scope) | |
4fd9bd13 | 381 | { |
69232621 | 382 | gcc_checking_assert (!seen_p (scope)); |
383 | LOOKUP_SEEN_P (scope) = true; | |
384 | vec_safe_push (scopes, scope); | |
385 | } | |
0e1d7e20 | 386 | |
69232621 | 387 | bool |
388 | name_lookup::find_and_mark (tree scope) | |
389 | { | |
390 | bool result = LOOKUP_FOUND_P (scope); | |
391 | if (!result) | |
392 | { | |
393 | LOOKUP_FOUND_P (scope) = true; | |
394 | if (!LOOKUP_SEEN_P (scope)) | |
395 | vec_safe_push (scopes, scope); | |
396 | } | |
af694375 | 397 | |
69232621 | 398 | return result; |
399 | } | |
0e1d7e20 | 400 | |
421bfc0f | 401 | /* THING and CURRENT are ambiguous, concatenate them. */ |
402 | ||
403 | tree | |
404 | name_lookup::ambiguous (tree thing, tree current) | |
405 | { | |
406 | if (TREE_CODE (current) != TREE_LIST) | |
407 | { | |
408 | current = build_tree_list (NULL_TREE, current); | |
409 | TREE_TYPE (current) = error_mark_node; | |
410 | } | |
411 | current = tree_cons (NULL_TREE, thing, current); | |
412 | TREE_TYPE (current) = error_mark_node; | |
413 | ||
414 | return current; | |
415 | } | |
416 | ||
6fbf0ce6 | 417 | /* FNS is a new overload set to add to the exising set. */ |
418 | ||
419 | void | |
420 | name_lookup::add_overload (tree fns) | |
421 | { | |
422 | if (!deduping && TREE_CODE (fns) == OVERLOAD) | |
423 | { | |
424 | tree probe = fns; | |
425 | if (flags & LOOKUP_HIDDEN) | |
426 | probe = ovl_skip_hidden (probe); | |
427 | if (probe && TREE_CODE (probe) == OVERLOAD && OVL_USING_P (probe)) | |
428 | { | |
429 | /* We're about to add something found by a using | |
430 | declaration, so need to engage deduping mode. */ | |
431 | lookup_mark (value, true); | |
432 | deduping = true; | |
433 | } | |
434 | } | |
435 | ||
436 | value = lookup_maybe_add (fns, value, deduping); | |
437 | } | |
438 | ||
421bfc0f | 439 | /* Add a NEW_VAL, a found value binding into the current value binding. */ |
440 | ||
441 | void | |
442 | name_lookup::add_value (tree new_val) | |
443 | { | |
6fbf0ce6 | 444 | if (OVL_P (new_val) && (!value || OVL_P (value))) |
445 | add_overload (new_val); | |
446 | else if (!value) | |
421bfc0f | 447 | value = new_val; |
448 | else if (value == new_val) | |
449 | ; | |
450 | else if ((TREE_CODE (value) == TYPE_DECL | |
451 | && TREE_CODE (new_val) == TYPE_DECL | |
452 | && same_type_p (TREE_TYPE (value), TREE_TYPE (new_val)))) | |
acf2785b | 453 | /* Typedefs to the same type. */; |
454 | else if (TREE_CODE (value) == NAMESPACE_DECL | |
455 | && TREE_CODE (new_val) == NAMESPACE_DECL | |
456 | && ORIGINAL_NAMESPACE (value) == ORIGINAL_NAMESPACE (new_val)) | |
457 | /* Namespace (possibly aliased) to the same namespace. Locate | |
458 | the namespace*/ | |
459 | value = ORIGINAL_NAMESPACE (value); | |
421bfc0f | 460 | else |
6fbf0ce6 | 461 | { |
462 | if (deduping) | |
463 | { | |
464 | /* Disengage deduping mode. */ | |
465 | lookup_mark (value, false); | |
466 | deduping = false; | |
467 | } | |
468 | value = ambiguous (new_val, value); | |
469 | } | |
421bfc0f | 470 | } |
471 | ||
472 | /* Add a NEW_TYPE, a found type binding into the current type binding. */ | |
473 | ||
474 | void | |
475 | name_lookup::add_type (tree new_type) | |
476 | { | |
477 | if (!type) | |
478 | type = new_type; | |
479 | else if (TREE_CODE (type) == TREE_LIST | |
480 | || !same_type_p (TREE_TYPE (type), TREE_TYPE (new_type))) | |
481 | type = ambiguous (new_type, type); | |
482 | } | |
483 | ||
484 | /* Process a found binding containing NEW_VAL and NEW_TYPE. Returns | |
485 | true if we actually found something noteworthy. */ | |
486 | ||
487 | bool | |
488 | name_lookup::process_binding (tree new_val, tree new_type) | |
489 | { | |
490 | /* Did we really see a type? */ | |
491 | if (new_type | |
492 | && (LOOKUP_NAMESPACES_ONLY (flags) | |
493 | || (!(flags & LOOKUP_HIDDEN) | |
494 | && DECL_LANG_SPECIFIC (new_type) | |
495 | && DECL_ANTICIPATED (new_type)))) | |
496 | new_type = NULL_TREE; | |
497 | ||
498 | if (new_val && !(flags & LOOKUP_HIDDEN)) | |
499 | new_val = ovl_skip_hidden (new_val); | |
500 | ||
501 | /* Do we really see a value? */ | |
502 | if (new_val) | |
503 | switch (TREE_CODE (new_val)) | |
504 | { | |
505 | case TEMPLATE_DECL: | |
506 | /* If we expect types or namespaces, and not templates, | |
507 | or this is not a template class. */ | |
508 | if ((LOOKUP_QUALIFIERS_ONLY (flags) | |
509 | && !DECL_TYPE_TEMPLATE_P (new_val))) | |
510 | new_val = NULL_TREE; | |
511 | break; | |
512 | case TYPE_DECL: | |
513 | if (LOOKUP_NAMESPACES_ONLY (flags) | |
514 | || (new_type && (flags & LOOKUP_PREFER_TYPES))) | |
515 | new_val = NULL_TREE; | |
516 | break; | |
517 | case NAMESPACE_DECL: | |
518 | if (LOOKUP_TYPES_ONLY (flags)) | |
519 | new_val = NULL_TREE; | |
520 | break; | |
521 | default: | |
522 | if (LOOKUP_QUALIFIERS_ONLY (flags)) | |
523 | new_val = NULL_TREE; | |
524 | } | |
525 | ||
526 | if (!new_val) | |
527 | { | |
528 | new_val = new_type; | |
529 | new_type = NULL_TREE; | |
530 | } | |
531 | ||
532 | /* Merge into the lookup */ | |
533 | if (new_val) | |
534 | add_value (new_val); | |
535 | if (new_type) | |
536 | add_type (new_type); | |
537 | ||
538 | return new_val != NULL_TREE; | |
539 | } | |
540 | ||
541 | /* Look in exactly namespace SCOPE. */ | |
542 | ||
543 | bool | |
544 | name_lookup::search_namespace_only (tree scope) | |
545 | { | |
546 | bool found = false; | |
547 | ||
17d66324 | 548 | if (tree *binding = find_namespace_slot (scope, name)) |
549 | found |= process_binding (MAYBE_STAT_DECL (*binding), | |
550 | MAYBE_STAT_TYPE (*binding)); | |
421bfc0f | 551 | |
552 | return found; | |
553 | } | |
554 | ||
555 | /* Conditionally look in namespace SCOPE and inline children. */ | |
556 | ||
557 | bool | |
558 | name_lookup::search_namespace (tree scope) | |
559 | { | |
560 | if (see_and_mark (scope)) | |
561 | /* We've visited this scope before. Return what we found then. */ | |
562 | return found_p (scope); | |
563 | ||
564 | /* Look in exactly namespace. */ | |
565 | bool found = search_namespace_only (scope); | |
566 | ||
0a2455c5 | 567 | /* Recursively look in its inline children. */ |
568 | if (vec<tree, va_gc> *inlinees = DECL_NAMESPACE_INLINEES (scope)) | |
569 | for (unsigned ix = inlinees->length (); ix--;) | |
570 | found |= search_namespace ((*inlinees)[ix]); | |
421bfc0f | 571 | |
572 | if (found) | |
573 | mark_found (scope); | |
574 | ||
575 | return found; | |
576 | } | |
577 | ||
578 | /* Recursively follow using directives of SCOPE & its inline children. | |
579 | Such following is essentially a flood-fill algorithm. */ | |
580 | ||
581 | bool | |
582 | name_lookup::search_usings (tree scope) | |
583 | { | |
584 | /* We do not check seen_p here, as that was already set during the | |
585 | namespace_only walk. */ | |
586 | if (found_p (scope)) | |
587 | return true; | |
588 | ||
589 | bool found = false; | |
0a2455c5 | 590 | if (vec<tree, va_gc> *usings = DECL_NAMESPACE_USING (scope)) |
591 | for (unsigned ix = usings->length (); ix--;) | |
592 | found |= search_qualified ((*usings)[ix], true); | |
421bfc0f | 593 | |
594 | /* Look in its inline children. */ | |
0a2455c5 | 595 | if (vec<tree, va_gc> *inlinees = DECL_NAMESPACE_INLINEES (scope)) |
596 | for (unsigned ix = inlinees->length (); ix--;) | |
597 | found |= search_usings ((*inlinees)[ix]); | |
421bfc0f | 598 | |
599 | if (found) | |
600 | mark_found (scope); | |
601 | ||
602 | return found; | |
603 | } | |
604 | ||
605 | /* Qualified namespace lookup in SCOPE. | |
606 | 1) Look in SCOPE (+inlines). If found, we're done. | |
607 | 2) Otherwise, if USINGS is true, | |
608 | recurse for every using directive of SCOPE (+inlines). | |
609 | ||
610 | Trickiness is (a) loops and (b) multiple paths to same namespace. | |
611 | In both cases we want to not repeat any lookups, and know whether | |
612 | to stop the caller's step #2. Do this via the FOUND_P marker. */ | |
613 | ||
614 | bool | |
615 | name_lookup::search_qualified (tree scope, bool usings) | |
616 | { | |
617 | bool found = false; | |
618 | ||
619 | if (seen_p (scope)) | |
620 | found = found_p (scope); | |
621 | else | |
622 | { | |
623 | found = search_namespace (scope); | |
624 | if (!found && usings) | |
625 | found = search_usings (scope); | |
626 | } | |
627 | ||
628 | return found; | |
629 | } | |
630 | ||
9ff63f75 | 631 | /* Add SCOPE to the unqualified search queue, recursively add its |
632 | inlines and those via using directives. */ | |
633 | ||
634 | name_lookup::using_queue * | |
635 | name_lookup::queue_namespace (using_queue *queue, int depth, tree scope) | |
636 | { | |
637 | if (see_and_mark (scope)) | |
638 | return queue; | |
639 | ||
640 | /* Record it. */ | |
641 | tree common = scope; | |
642 | while (SCOPE_DEPTH (common) > depth) | |
643 | common = CP_DECL_CONTEXT (common); | |
644 | vec_safe_push (queue, using_pair (common, scope)); | |
645 | ||
646 | /* Queue its inline children. */ | |
0a2455c5 | 647 | if (vec<tree, va_gc> *inlinees = DECL_NAMESPACE_INLINEES (scope)) |
648 | for (unsigned ix = inlinees->length (); ix--;) | |
649 | queue = queue_namespace (queue, depth, (*inlinees)[ix]); | |
9ff63f75 | 650 | |
651 | /* Queue its using targets. */ | |
652 | queue = queue_usings (queue, depth, DECL_NAMESPACE_USING (scope)); | |
653 | ||
654 | return queue; | |
655 | } | |
656 | ||
657 | /* Add the namespaces in USINGS to the unqualified search queue. */ | |
658 | ||
659 | name_lookup::using_queue * | |
0a2455c5 | 660 | name_lookup::do_queue_usings (using_queue *queue, int depth, |
661 | vec<tree, va_gc> *usings) | |
9ff63f75 | 662 | { |
0a2455c5 | 663 | for (unsigned ix = usings->length (); ix--;) |
664 | queue = queue_namespace (queue, depth, (*usings)[ix]); | |
9ff63f75 | 665 | |
666 | return queue; | |
667 | } | |
668 | ||
669 | /* Unqualified namespace lookup in SCOPE. | |
670 | 1) add scope+inlins to worklist. | |
671 | 2) recursively add target of every using directive | |
672 | 3) for each worklist item where SCOPE is common ancestor, search it | |
673 | 4) if nothing find, scope=parent, goto 1. */ | |
674 | ||
675 | bool | |
676 | name_lookup::search_unqualified (tree scope, cp_binding_level *level) | |
677 | { | |
678 | /* Make static to avoid continual reallocation. We're not | |
679 | recursive. */ | |
680 | static using_queue *queue = NULL; | |
681 | bool found = false; | |
682 | int length = vec_safe_length (queue); | |
683 | ||
684 | /* Queue local using-directives. */ | |
685 | for (; level->kind != sk_namespace; level = level->level_chain) | |
686 | queue = queue_usings (queue, SCOPE_DEPTH (scope), level->using_directives); | |
687 | ||
688 | for (; !found; scope = CP_DECL_CONTEXT (scope)) | |
689 | { | |
690 | gcc_assert (!DECL_NAMESPACE_ALIAS (scope)); | |
691 | int depth = SCOPE_DEPTH (scope); | |
692 | ||
693 | /* Queue namespaces reachable from SCOPE. */ | |
694 | queue = queue_namespace (queue, depth, scope); | |
695 | ||
696 | /* Search every queued namespace where SCOPE is the common | |
697 | ancestor. Adjust the others. */ | |
698 | unsigned ix = length; | |
699 | do | |
700 | { | |
701 | using_pair &pair = (*queue)[ix]; | |
702 | while (pair.first == scope) | |
703 | { | |
704 | found |= search_namespace_only (pair.second); | |
705 | pair = queue->pop (); | |
706 | if (ix == queue->length ()) | |
707 | goto done; | |
708 | } | |
709 | /* The depth is the same as SCOPE, find the parent scope. */ | |
710 | if (SCOPE_DEPTH (pair.first) == depth) | |
711 | pair.first = CP_DECL_CONTEXT (pair.first); | |
712 | ix++; | |
713 | } | |
714 | while (ix < queue->length ()); | |
715 | done:; | |
716 | if (scope == global_namespace) | |
717 | break; | |
718 | } | |
719 | ||
720 | vec_safe_truncate (queue, length); | |
721 | ||
722 | return found; | |
723 | } | |
724 | ||
69232621 | 725 | /* FNS is a value binding. If it is a (set of overloaded) functions, |
726 | add them into the current value. */ | |
af694375 | 727 | |
69232621 | 728 | void |
729 | name_lookup::add_fns (tree fns) | |
730 | { | |
731 | if (!fns) | |
732 | return; | |
733 | else if (TREE_CODE (fns) == OVERLOAD) | |
af694375 | 734 | { |
69232621 | 735 | if (TREE_TYPE (fns) != unknown_type_node) |
736 | fns = OVL_FUNCTION (fns); | |
4fd9bd13 | 737 | } |
69232621 | 738 | else if (!DECL_DECLARES_FUNCTION_P (fns)) |
739 | return; | |
0e1d7e20 | 740 | |
6fbf0ce6 | 741 | add_overload (fns); |
af694375 | 742 | } |
743 | ||
69232621 | 744 | /* Add functions of a namespace to the lookup structure. */ |
0e1d7e20 | 745 | |
69232621 | 746 | void |
747 | name_lookup::adl_namespace_only (tree scope) | |
af694375 | 748 | { |
69232621 | 749 | mark_seen (scope); |
af694375 | 750 | |
69232621 | 751 | /* Look down into inline namespaces. */ |
0a2455c5 | 752 | if (vec<tree, va_gc> *inlinees = DECL_NAMESPACE_INLINEES (scope)) |
753 | for (unsigned ix = inlinees->length (); ix--;) | |
754 | adl_namespace_only ((*inlinees)[ix]); | |
4fd9bd13 | 755 | |
17d66324 | 756 | if (tree fns = find_namespace_value (scope, name)) |
757 | add_fns (ovl_skip_hidden (fns)); | |
69232621 | 758 | } |
653e5405 | 759 | |
69232621 | 760 | /* Find the containing non-inlined namespace, add it and all its |
761 | inlinees. */ | |
4fd9bd13 | 762 | |
69232621 | 763 | void |
764 | name_lookup::adl_namespace (tree scope) | |
765 | { | |
766 | if (seen_p (scope)) | |
767 | return; | |
768 | ||
769 | /* Find the containing non-inline namespace. */ | |
770 | while (DECL_NAMESPACE_INLINE_P (scope)) | |
771 | scope = CP_DECL_CONTEXT (scope); | |
772 | ||
773 | adl_namespace_only (scope); | |
af694375 | 774 | } |
775 | ||
69232621 | 776 | /* Adds the class and its friends to the lookup structure. */ |
0e1d7e20 | 777 | |
69232621 | 778 | void |
779 | name_lookup::adl_class_only (tree type) | |
af694375 | 780 | { |
4fd9bd13 | 781 | /* Backend-built structures, such as __builtin_va_list, aren't |
782 | affected by all this. */ | |
783 | if (!CLASS_TYPE_P (type)) | |
69232621 | 784 | return; |
785 | ||
786 | type = TYPE_MAIN_VARIANT (type); | |
af694375 | 787 | |
69232621 | 788 | if (see_and_mark (type)) |
789 | return; | |
790 | ||
791 | tree context = decl_namespace_context (type); | |
792 | adl_namespace (context); | |
af694375 | 793 | |
4fd9bd13 | 794 | complete_type (type); |
0e1d7e20 | 795 | |
69232621 | 796 | /* Add friends. */ |
797 | for (tree list = DECL_FRIENDLIST (TYPE_MAIN_DECL (type)); list; | |
4fd9bd13 | 798 | list = TREE_CHAIN (list)) |
69232621 | 799 | if (name == FRIEND_NAME (list)) |
800 | for (tree friends = FRIEND_DECLS (list); friends; | |
4fd9bd13 | 801 | friends = TREE_CHAIN (friends)) |
802 | { | |
803 | tree fn = TREE_VALUE (friends); | |
af694375 | 804 | |
4fd9bd13 | 805 | /* Only interested in global functions with potentially hidden |
806 | (i.e. unqualified) declarations. */ | |
807 | if (CP_DECL_CONTEXT (fn) != context) | |
808 | continue; | |
69232621 | 809 | |
56e1183f | 810 | /* Only interested in anticipated friends. (Non-anticipated |
811 | ones will have been inserted during the namespace | |
812 | adl.) */ | |
813 | if (!DECL_ANTICIPATED (fn)) | |
814 | continue; | |
815 | ||
4fd9bd13 | 816 | /* Template specializations are never found by name lookup. |
817 | (Templates themselves can be found, but not template | |
818 | specializations.) */ | |
819 | if (TREE_CODE (fn) == FUNCTION_DECL && DECL_USE_TEMPLATE (fn)) | |
820 | continue; | |
af694375 | 821 | |
69232621 | 822 | add_fns (fn); |
823 | } | |
af694375 | 824 | } |
825 | ||
4fd9bd13 | 826 | /* Adds the class and its bases to the lookup structure. |
827 | Returns true on error. */ | |
0e1d7e20 | 828 | |
69232621 | 829 | void |
830 | name_lookup::adl_bases (tree type) | |
af694375 | 831 | { |
69232621 | 832 | adl_class_only (type); |
b088fe55 | 833 | |
69232621 | 834 | /* Process baseclasses. */ |
835 | if (tree binfo = TYPE_BINFO (type)) | |
af694375 | 836 | { |
69232621 | 837 | tree base_binfo; |
4fd9bd13 | 838 | int i; |
8546e572 | 839 | |
69232621 | 840 | for (i = 0; BINFO_BASE_ITERATE (binfo, i, base_binfo); i++) |
841 | adl_bases (BINFO_TYPE (base_binfo)); | |
4fd9bd13 | 842 | } |
598057ec | 843 | } |
844 | ||
4fd9bd13 | 845 | /* Adds everything associated with a class argument type to the lookup |
846 | structure. Returns true on error. | |
0e1d7e20 | 847 | |
4fd9bd13 | 848 | If T is a class type (including unions), its associated classes are: the |
849 | class itself; the class of which it is a member, if any; and its direct | |
850 | and indirect base classes. Its associated namespaces are the namespaces | |
851 | of which its associated classes are members. Furthermore, if T is a | |
852 | class template specialization, its associated namespaces and classes | |
853 | also include: the namespaces and classes associated with the types of | |
854 | the template arguments provided for template type parameters (excluding | |
855 | template template parameters); the namespaces of which any template | |
856 | template arguments are members; and the classes of which any member | |
857 | templates used as template template arguments are members. [ Note: | |
858 | non-type template arguments do not contribute to the set of associated | |
859 | namespaces. --end note] */ | |
860 | ||
69232621 | 861 | void |
862 | name_lookup::adl_class (tree type) | |
8546e572 | 863 | { |
4fd9bd13 | 864 | /* Backend build structures, such as __builtin_va_list, aren't |
865 | affected by all this. */ | |
866 | if (!CLASS_TYPE_P (type)) | |
69232621 | 867 | return; |
8546e572 | 868 | |
69232621 | 869 | type = TYPE_MAIN_VARIANT (type); |
870 | /* We don't set found here because we have to have set seen first, | |
871 | which is done in the adl_bases walk. */ | |
872 | if (found_p (type)) | |
873 | return; | |
8546e572 | 874 | |
69232621 | 875 | adl_bases (type); |
876 | mark_found (type); | |
0e1d7e20 | 877 | |
69232621 | 878 | if (TYPE_CLASS_SCOPE_P (type)) |
879 | adl_class_only (TYPE_CONTEXT (type)); | |
3bd975bc | 880 | |
4fd9bd13 | 881 | /* Process template arguments. */ |
882 | if (CLASSTYPE_TEMPLATE_INFO (type) | |
883 | && PRIMARY_TEMPLATE_P (CLASSTYPE_TI_TEMPLATE (type))) | |
884 | { | |
69232621 | 885 | tree list = INNERMOST_TEMPLATE_ARGS (CLASSTYPE_TI_ARGS (type)); |
886 | for (int i = 0; i < TREE_VEC_LENGTH (list); ++i) | |
887 | adl_template_arg (TREE_VEC_ELT (list, i)); | |
4fd9bd13 | 888 | } |
d09ae6d5 | 889 | } |
890 | ||
69232621 | 891 | void |
892 | name_lookup::adl_expr (tree expr) | |
893 | { | |
894 | if (!expr) | |
895 | return; | |
d09ae6d5 | 896 | |
69232621 | 897 | gcc_assert (!TYPE_P (expr)); |
898 | ||
899 | if (TREE_TYPE (expr) != unknown_type_node) | |
900 | { | |
901 | adl_type (TREE_TYPE (expr)); | |
902 | return; | |
903 | } | |
904 | ||
905 | if (TREE_CODE (expr) == ADDR_EXPR) | |
906 | expr = TREE_OPERAND (expr, 0); | |
907 | if (TREE_CODE (expr) == COMPONENT_REF | |
908 | || TREE_CODE (expr) == OFFSET_REF) | |
909 | expr = TREE_OPERAND (expr, 1); | |
910 | expr = MAYBE_BASELINK_FUNCTIONS (expr); | |
911 | ||
912 | if (OVL_P (expr)) | |
913 | for (lkp_iterator iter (expr); iter; ++iter) | |
914 | adl_type (TREE_TYPE (*iter)); | |
915 | else if (TREE_CODE (expr) == TEMPLATE_ID_EXPR) | |
916 | { | |
917 | /* The working paper doesn't currently say how to handle | |
918 | template-id arguments. The sensible thing would seem to be | |
919 | to handle the list of template candidates like a normal | |
920 | overload set, and handle the template arguments like we do | |
921 | for class template specializations. */ | |
922 | ||
923 | /* First the templates. */ | |
924 | adl_expr (TREE_OPERAND (expr, 0)); | |
925 | ||
926 | /* Now the arguments. */ | |
927 | if (tree args = TREE_OPERAND (expr, 1)) | |
928 | for (int ix = TREE_VEC_LENGTH (args); ix--;) | |
929 | adl_template_arg (TREE_VEC_ELT (args, ix)); | |
930 | } | |
931 | } | |
932 | ||
933 | void | |
934 | name_lookup::adl_type (tree type) | |
d09ae6d5 | 935 | { |
4fd9bd13 | 936 | if (!type) |
69232621 | 937 | return; |
78eb3a28 | 938 | |
4fd9bd13 | 939 | if (TYPE_PTRDATAMEM_P (type)) |
d09ae6d5 | 940 | { |
4fd9bd13 | 941 | /* Pointer to member: associate class type and value type. */ |
69232621 | 942 | adl_type (TYPE_PTRMEM_CLASS_TYPE (type)); |
943 | adl_type (TYPE_PTRMEM_POINTED_TO_TYPE (type)); | |
944 | return; | |
598057ec | 945 | } |
69232621 | 946 | |
947 | switch (TREE_CODE (type)) | |
4fd9bd13 | 948 | { |
4fd9bd13 | 949 | case RECORD_TYPE: |
950 | if (TYPE_PTRMEMFUNC_P (type)) | |
69232621 | 951 | { |
952 | adl_type (TYPE_PTRMEMFUNC_FN_TYPE (type)); | |
953 | return; | |
954 | } | |
4fd9bd13 | 955 | /* FALLTHRU */ |
956 | case UNION_TYPE: | |
69232621 | 957 | adl_class (type); |
958 | return; | |
959 | ||
4fd9bd13 | 960 | case METHOD_TYPE: |
961 | /* The basetype is referenced in the first arg type, so just | |
962 | fall through. */ | |
963 | case FUNCTION_TYPE: | |
964 | /* Associate the parameter types. */ | |
69232621 | 965 | for (tree args = TYPE_ARG_TYPES (type); args; args = TREE_CHAIN (args)) |
966 | adl_type (TREE_VALUE (args)); | |
967 | /* FALLTHROUGH */ | |
968 | ||
969 | case POINTER_TYPE: | |
970 | case REFERENCE_TYPE: | |
971 | case ARRAY_TYPE: | |
972 | adl_type (TREE_TYPE (type)); | |
973 | return; | |
974 | ||
975 | case ENUMERAL_TYPE: | |
976 | if (TYPE_CLASS_SCOPE_P (type)) | |
977 | adl_class_only (TYPE_CONTEXT (type)); | |
978 | adl_namespace (decl_namespace_context (type)); | |
979 | return; | |
980 | ||
4fd9bd13 | 981 | case LANG_TYPE: |
982 | gcc_assert (type == unknown_type_node | |
983 | || type == init_list_type_node); | |
69232621 | 984 | return; |
985 | ||
4fd9bd13 | 986 | case TYPE_PACK_EXPANSION: |
69232621 | 987 | adl_type (PACK_EXPANSION_PATTERN (type)); |
988 | return; | |
9031d10b | 989 | |
4fd9bd13 | 990 | default: |
69232621 | 991 | break; |
4fd9bd13 | 992 | } |
836495aa | 993 | } |
994 | ||
69232621 | 995 | /* Adds everything associated with a template argument to the lookup |
996 | structure. */ | |
836495aa | 997 | |
69232621 | 998 | void |
999 | name_lookup::adl_template_arg (tree arg) | |
836495aa | 1000 | { |
69232621 | 1001 | /* [basic.lookup.koenig] |
836495aa | 1002 | |
69232621 | 1003 | If T is a template-id, its associated namespaces and classes are |
1004 | ... the namespaces and classes associated with the types of the | |
1005 | template arguments provided for template type parameters | |
1006 | (excluding template template parameters); the namespaces in which | |
1007 | any template template arguments are defined; and the classes in | |
1008 | which any member templates used as template template arguments | |
1009 | are defined. [Note: non-type template arguments do not | |
1010 | contribute to the set of associated namespaces. ] */ | |
836495aa | 1011 | |
69232621 | 1012 | /* Consider first template template arguments. */ |
1013 | if (TREE_CODE (arg) == TEMPLATE_TEMPLATE_PARM | |
1014 | || TREE_CODE (arg) == UNBOUND_CLASS_TEMPLATE) | |
1015 | ; | |
1016 | else if (TREE_CODE (arg) == TEMPLATE_DECL) | |
836495aa | 1017 | { |
69232621 | 1018 | tree ctx = CP_DECL_CONTEXT (arg); |
4fd9bd13 | 1019 | |
69232621 | 1020 | /* It's not a member template. */ |
1021 | if (TREE_CODE (ctx) == NAMESPACE_DECL) | |
1022 | adl_namespace (ctx); | |
1023 | /* Otherwise, it must be member template. */ | |
1024 | else | |
1025 | adl_class_only (ctx); | |
836495aa | 1026 | } |
69232621 | 1027 | /* It's an argument pack; handle it recursively. */ |
1028 | else if (ARGUMENT_PACK_P (arg)) | |
4fd9bd13 | 1029 | { |
69232621 | 1030 | tree args = ARGUMENT_PACK_ARGS (arg); |
1031 | int i, len = TREE_VEC_LENGTH (args); | |
1032 | for (i = 0; i < len; ++i) | |
1033 | adl_template_arg (TREE_VEC_ELT (args, i)); | |
4fd9bd13 | 1034 | } |
69232621 | 1035 | /* It's not a template template argument, but it is a type template |
1036 | argument. */ | |
1037 | else if (TYPE_P (arg)) | |
1038 | adl_type (arg); | |
836495aa | 1039 | } |
1040 | ||
69232621 | 1041 | /* Perform ADL lookup. FNS is the existing lookup result and ARGS are |
1042 | the call arguments. */ | |
3976d9d3 | 1043 | |
69232621 | 1044 | tree |
1045 | name_lookup::search_adl (tree fns, vec<tree, va_gc> *args) | |
3976d9d3 | 1046 | { |
6fbf0ce6 | 1047 | if (fns) |
1048 | { | |
1049 | deduping = true; | |
1050 | lookup_mark (fns, true); | |
1051 | } | |
69232621 | 1052 | value = fns; |
1129c819 | 1053 | |
69232621 | 1054 | unsigned ix; |
1055 | tree arg; | |
1056 | ||
1057 | FOR_EACH_VEC_ELT_REVERSE (*args, ix, arg) | |
82b795da | 1058 | /* OMP reduction operators put an ADL-significant type as the |
1059 | first arg. */ | |
1060 | if (TYPE_P (arg)) | |
1061 | adl_type (arg); | |
1062 | else | |
69232621 | 1063 | adl_expr (arg); |
1064 | ||
69232621 | 1065 | fns = value; |
3bd975bc | 1066 | |
4fd9bd13 | 1067 | return fns; |
1068 | } | |
3bd975bc | 1069 | |
421bfc0f | 1070 | static bool qualified_namespace_lookup (tree, name_lookup *); |
1071 | static void consider_binding_level (tree name, | |
1072 | best_match <tree, const char *> &bm, | |
1073 | cp_binding_level *lvl, | |
1074 | bool look_within_fields, | |
1075 | enum lookup_name_fuzzy_kind kind); | |
421bfc0f | 1076 | static void diagnose_name_conflict (tree, tree); |
1077 | ||
69232621 | 1078 | /* ADL lookup of NAME. FNS is the result of regular lookup, and we |
1079 | don't add duplicates to it. ARGS is the vector of call | |
1080 | arguments (which will not be empty). */ | |
3bd975bc | 1081 | |
69232621 | 1082 | tree |
4fd9bd13 | 1083 | lookup_arg_dependent (tree name, tree fns, vec<tree, va_gc> *args) |
3bd975bc | 1084 | { |
69232621 | 1085 | bool subtime = timevar_cond_start (TV_NAME_LOOKUP); |
1086 | name_lookup lookup (name); | |
1087 | fns = lookup.search_adl (fns, args); | |
4fd9bd13 | 1088 | timevar_cond_stop (TV_NAME_LOOKUP, subtime); |
69232621 | 1089 | return fns; |
1090 | } | |
1091 | ||
2edde495 | 1092 | /* FNS is an overload set of conversion functions. Return the |
1093 | overloads converting to TYPE. */ | |
03d9ebc0 | 1094 | |
1095 | static tree | |
2edde495 | 1096 | extract_conversion_operator (tree fns, tree type) |
03d9ebc0 | 1097 | { |
ca9219bf | 1098 | tree convs = NULL_TREE; |
2edde495 | 1099 | tree tpls = NULL_TREE; |
03d9ebc0 | 1100 | |
2edde495 | 1101 | for (ovl_iterator iter (fns); iter; ++iter) |
03d9ebc0 | 1102 | { |
2edde495 | 1103 | if (same_type_p (DECL_CONV_FN_TYPE (*iter), type)) |
1104 | convs = lookup_add (*iter, convs); | |
ca9219bf | 1105 | |
2edde495 | 1106 | if (TREE_CODE (*iter) == TEMPLATE_DECL) |
1107 | tpls = lookup_add (*iter, tpls); | |
03d9ebc0 | 1108 | } |
1109 | ||
2edde495 | 1110 | if (!convs) |
1111 | convs = tpls; | |
1112 | ||
ca9219bf | 1113 | return convs; |
03d9ebc0 | 1114 | } |
1115 | ||
b44d8617 | 1116 | /* Binary search of (ordered) MEMBER_VEC for NAME. */ |
03d9ebc0 | 1117 | |
446b42ca | 1118 | static tree |
b44d8617 | 1119 | member_vec_binary_search (vec<tree, va_gc> *member_vec, tree name) |
03d9ebc0 | 1120 | { |
b44d8617 | 1121 | for (unsigned lo = 0, hi = member_vec->length (); lo < hi;) |
03d9ebc0 | 1122 | { |
446b42ca | 1123 | unsigned mid = (lo + hi) / 2; |
b44d8617 | 1124 | tree binding = (*member_vec)[mid]; |
446b42ca | 1125 | tree binding_name = OVL_NAME (binding); |
1126 | ||
1127 | if (binding_name > name) | |
1128 | hi = mid; | |
1129 | else if (binding_name < name) | |
1130 | lo = mid + 1; | |
1131 | else | |
1132 | return binding; | |
03d9ebc0 | 1133 | } |
03d9ebc0 | 1134 | |
446b42ca | 1135 | return NULL_TREE; |
1136 | } | |
2edde495 | 1137 | |
b44d8617 | 1138 | /* Linear search of (unordered) MEMBER_VEC for NAME. */ |
446b42ca | 1139 | |
1140 | static tree | |
b44d8617 | 1141 | member_vec_linear_search (vec<tree, va_gc> *member_vec, tree name) |
446b42ca | 1142 | { |
b44d8617 | 1143 | for (int ix = member_vec->length (); ix--;) |
446b42ca | 1144 | /* We can get a NULL binding during insertion of a new method |
1145 | name, because the identifier_binding machinery performs a | |
1146 | lookup. If we find such a NULL slot, that's the thing we were | |
1147 | looking for, so we might as well bail out immediately. */ | |
b44d8617 | 1148 | if (tree binding = (*member_vec)[ix]) |
446b42ca | 1149 | { |
1150 | if (OVL_NAME (binding) == name) | |
1151 | return binding; | |
1152 | } | |
1153 | else | |
1154 | break; | |
1155 | ||
1156 | return NULL_TREE; | |
03d9ebc0 | 1157 | } |
1158 | ||
7c06dc60 | 1159 | /* Linear search of (partially ordered) fields of KLASS for NAME. */ |
03d9ebc0 | 1160 | |
446b42ca | 1161 | static tree |
7c06dc60 | 1162 | fields_linear_search (tree klass, tree name, bool want_type) |
03d9ebc0 | 1163 | { |
7c06dc60 | 1164 | for (tree fields = TYPE_FIELDS (klass); fields; fields = DECL_CHAIN (fields)) |
03d9ebc0 | 1165 | { |
7c06dc60 | 1166 | tree decl = fields; |
03d9ebc0 | 1167 | |
7c06dc60 | 1168 | if (!want_type |
1169 | && TREE_CODE (decl) == FIELD_DECL | |
1170 | && ANON_AGGR_TYPE_P (TREE_TYPE (decl))) | |
03d9ebc0 | 1171 | { |
7c06dc60 | 1172 | tree anon = TREE_TYPE (decl); |
1173 | gcc_assert (COMPLETE_TYPE_P (anon)); | |
1174 | tree temp; | |
1175 | ||
b44d8617 | 1176 | if (vec<tree, va_gc> *member_vec = CLASSTYPE_MEMBER_VEC (anon)) |
1177 | temp = member_vec_linear_search (member_vec, name); | |
a7dd9a0d | 1178 | else |
7c06dc60 | 1179 | temp = fields_linear_search (anon, name, want_type); |
a7dd9a0d | 1180 | |
7c06dc60 | 1181 | if (temp) |
1182 | { | |
1183 | /* Anon members can only contain fields. */ | |
1184 | gcc_assert (!STAT_HACK_P (temp) && !DECL_DECLARES_TYPE_P (temp)); | |
1185 | return temp; | |
a7dd9a0d | 1186 | } |
03d9ebc0 | 1187 | } |
03d9ebc0 | 1188 | |
7c06dc60 | 1189 | if (DECL_NAME (decl) != name) |
03d9ebc0 | 1190 | continue; |
7c06dc60 | 1191 | |
1192 | if (TREE_CODE (decl) == USING_DECL) | |
03d9ebc0 | 1193 | { |
1194 | decl = strip_using_decl (decl); | |
1195 | if (is_overloaded_fn (decl)) | |
1196 | continue; | |
1197 | } | |
1198 | ||
7c06dc60 | 1199 | if (DECL_DECLARES_FUNCTION_P (decl)) |
1200 | /* Functions are found separately. */ | |
1201 | continue; | |
1202 | ||
1203 | if (!want_type || DECL_DECLARES_TYPE_P (decl)) | |
03d9ebc0 | 1204 | return decl; |
1205 | } | |
1206 | ||
03d9ebc0 | 1207 | return NULL_TREE; |
1208 | } | |
1209 | ||
446b42ca | 1210 | /* Look for NAME as an immediate member of KLASS (including |
1211 | anon-members or unscoped enum member). TYPE_OR_FNS is zero for | |
1212 | regular search. >0 to get a type binding (if there is one) and <0 | |
1213 | if you want (just) the member function binding. | |
1214 | ||
1215 | Use this if you do not want lazy member creation. */ | |
1216 | ||
1217 | tree | |
1218 | get_class_binding_direct (tree klass, tree name, int type_or_fns) | |
1219 | { | |
1220 | gcc_checking_assert (RECORD_OR_UNION_TYPE_P (klass)); | |
1221 | ||
1222 | /* Conversion operators can only be found by the marker conversion | |
1223 | operator name. */ | |
1224 | bool conv_op = IDENTIFIER_CONV_OP_P (name); | |
1225 | tree lookup = conv_op ? conv_op_identifier : name; | |
1226 | tree val = NULL_TREE; | |
b44d8617 | 1227 | vec<tree, va_gc> *member_vec = CLASSTYPE_MEMBER_VEC (klass); |
446b42ca | 1228 | |
b44d8617 | 1229 | if (COMPLETE_TYPE_P (klass) && member_vec) |
446b42ca | 1230 | { |
b44d8617 | 1231 | val = member_vec_binary_search (member_vec, lookup); |
7c06dc60 | 1232 | if (!val) |
1233 | ; | |
1234 | else if (type_or_fns > 0) | |
1235 | { | |
1236 | if (STAT_HACK_P (val)) | |
1237 | val = STAT_TYPE (val); | |
1238 | else if (!DECL_DECLARES_TYPE_P (val)) | |
1239 | val = NULL_TREE; | |
1240 | } | |
1241 | else if (STAT_HACK_P (val)) | |
1242 | val = STAT_DECL (val); | |
1243 | ||
1244 | if (val && TREE_CODE (val) == OVERLOAD | |
1245 | && TREE_CODE (OVL_FUNCTION (val)) == USING_DECL) | |
1246 | { | |
1247 | /* An overload with a dependent USING_DECL. Does the caller | |
1248 | want the USING_DECL or the functions? */ | |
1249 | if (type_or_fns < 0) | |
1250 | val = OVL_CHAIN (val); | |
1251 | else | |
1252 | val = OVL_FUNCTION (val); | |
1253 | } | |
446b42ca | 1254 | } |
7c06dc60 | 1255 | else |
1256 | { | |
b44d8617 | 1257 | if (member_vec && type_or_fns <= 0) |
1258 | val = member_vec_linear_search (member_vec, lookup); | |
446b42ca | 1259 | |
7c06dc60 | 1260 | if (type_or_fns < 0) |
1261 | /* Don't bother looking for field. We don't want it. */; | |
1262 | else if (!val || (TREE_CODE (val) == OVERLOAD && OVL_USING_P (val))) | |
1263 | /* Dependent using declarations are a 'field', make sure we | |
1264 | return that even if we saw an overload already. */ | |
1265 | if (tree field_val = fields_linear_search (klass, lookup, | |
1266 | type_or_fns > 0)) | |
1267 | if (!val || TREE_CODE (field_val) == USING_DECL) | |
1268 | val = field_val; | |
1269 | } | |
446b42ca | 1270 | |
1271 | /* Extract the conversion operators asked for, unless the general | |
1272 | conversion operator was requested. */ | |
1273 | if (val && conv_op) | |
1274 | { | |
1275 | gcc_checking_assert (OVL_FUNCTION (val) == conv_op_marker); | |
1276 | val = OVL_CHAIN (val); | |
1277 | if (tree type = TREE_TYPE (name)) | |
1278 | val = extract_conversion_operator (val, type); | |
1279 | } | |
1280 | ||
1281 | return val; | |
1282 | } | |
1283 | ||
1284 | /* Look for NAME's binding in exactly KLASS. See | |
1285 | get_class_binding_direct for argument description. Does lazy | |
1286 | special function creation as necessary. */ | |
03d9ebc0 | 1287 | |
1288 | tree | |
c8c010c3 | 1289 | get_class_binding (tree klass, tree name, int type_or_fns) |
03d9ebc0 | 1290 | { |
c8c010c3 | 1291 | klass = complete_type (klass); |
03d9ebc0 | 1292 | |
c8c010c3 | 1293 | if (COMPLETE_TYPE_P (klass)) |
03d9ebc0 | 1294 | { |
c8c010c3 | 1295 | /* Lazily declare functions, if we're going to search these. */ |
03d9ebc0 | 1296 | if (IDENTIFIER_CTOR_P (name)) |
1297 | { | |
c8c010c3 | 1298 | if (CLASSTYPE_LAZY_DEFAULT_CTOR (klass)) |
1299 | lazily_declare_fn (sfk_constructor, klass); | |
1300 | if (CLASSTYPE_LAZY_COPY_CTOR (klass)) | |
1301 | lazily_declare_fn (sfk_copy_constructor, klass); | |
1302 | if (CLASSTYPE_LAZY_MOVE_CTOR (klass)) | |
1303 | lazily_declare_fn (sfk_move_constructor, klass); | |
03d9ebc0 | 1304 | } |
c8c010c3 | 1305 | else if (IDENTIFIER_DTOR_P (name)) |
03d9ebc0 | 1306 | { |
c8c010c3 | 1307 | if (CLASSTYPE_LAZY_DESTRUCTOR (klass)) |
1308 | lazily_declare_fn (sfk_destructor, klass); | |
03d9ebc0 | 1309 | } |
c8c010c3 | 1310 | else if (name == cp_assignment_operator_id (NOP_EXPR)) |
03d9ebc0 | 1311 | { |
c8c010c3 | 1312 | if (CLASSTYPE_LAZY_COPY_ASSIGN (klass)) |
1313 | lazily_declare_fn (sfk_copy_assignment, klass); | |
1314 | if (CLASSTYPE_LAZY_MOVE_ASSIGN (klass)) | |
1315 | lazily_declare_fn (sfk_move_assignment, klass); | |
03d9ebc0 | 1316 | } |
1317 | } | |
1318 | ||
c8c010c3 | 1319 | return get_class_binding_direct (klass, name, type_or_fns); |
03d9ebc0 | 1320 | } |
1321 | ||
c682337f | 1322 | /* Find the slot containing overloads called 'NAME'. If there is no |
1323 | such slot, create an empty one. KLASS might be complete at this | |
1324 | point, in which case we need to preserve ordering. Deals with | |
1325 | conv_op marker handling. */ | |
1326 | ||
1327 | tree * | |
b44d8617 | 1328 | get_member_slot (tree klass, tree name) |
c682337f | 1329 | { |
1330 | bool complete_p = COMPLETE_TYPE_P (klass); | |
1331 | ||
b44d8617 | 1332 | vec<tree, va_gc> *member_vec = CLASSTYPE_MEMBER_VEC (klass); |
1333 | if (!member_vec) | |
c682337f | 1334 | { |
b44d8617 | 1335 | vec_alloc (member_vec, 8); |
1336 | CLASSTYPE_MEMBER_VEC (klass) = member_vec; | |
7c06dc60 | 1337 | if (complete_p) |
1338 | { | |
b44d8617 | 1339 | /* If the class is complete but had no member_vec, we need |
7c06dc60 | 1340 | to add the TYPE_FIELDS into it. We're also most likely |
1341 | to be adding ctors & dtors, so ask for 6 spare slots (the | |
1342 | abstract cdtors and their clones). */ | |
1343 | set_class_bindings (klass, 6); | |
b44d8617 | 1344 | member_vec = CLASSTYPE_MEMBER_VEC (klass); |
7c06dc60 | 1345 | } |
c682337f | 1346 | } |
1347 | ||
1348 | if (IDENTIFIER_CONV_OP_P (name)) | |
1349 | name = conv_op_identifier; | |
1350 | ||
b44d8617 | 1351 | unsigned ix, length = member_vec->length (); |
c682337f | 1352 | for (ix = 0; ix < length; ix++) |
1353 | { | |
b44d8617 | 1354 | tree *slot = &(*member_vec)[ix]; |
c682337f | 1355 | tree fn_name = OVL_NAME (*slot); |
1356 | ||
1357 | if (fn_name == name) | |
1358 | { | |
7c06dc60 | 1359 | /* If we found an existing slot, it must be a function set. |
1360 | Even with insertion after completion, because those only | |
1361 | happen with artificial fns that have unspellable names. | |
1362 | This means we do not have to deal with the stat hack | |
1363 | either. */ | |
1364 | gcc_checking_assert (OVL_P (*slot)); | |
c682337f | 1365 | if (name == conv_op_identifier) |
1366 | { | |
1367 | gcc_checking_assert (OVL_FUNCTION (*slot) == conv_op_marker); | |
1368 | /* Skip the conv-op marker. */ | |
1369 | slot = &OVL_CHAIN (*slot); | |
1370 | } | |
1371 | return slot; | |
1372 | } | |
1373 | ||
1374 | if (complete_p && fn_name > name) | |
1375 | break; | |
1376 | } | |
1377 | ||
1378 | /* No slot found. Create one at IX. We know in this case that our | |
1379 | caller will succeed in adding the function. */ | |
1380 | if (complete_p) | |
1381 | { | |
1382 | /* Do exact allocation when complete, as we don't expect to add | |
1383 | many. */ | |
b44d8617 | 1384 | vec_safe_reserve_exact (member_vec, 1); |
1385 | member_vec->quick_insert (ix, NULL_TREE); | |
c682337f | 1386 | } |
1387 | else | |
1388 | { | |
1389 | gcc_checking_assert (ix == length); | |
b44d8617 | 1390 | vec_safe_push (member_vec, NULL_TREE); |
c682337f | 1391 | } |
b44d8617 | 1392 | CLASSTYPE_MEMBER_VEC (klass) = member_vec; |
c682337f | 1393 | |
b44d8617 | 1394 | tree *slot = &(*member_vec)[ix]; |
c682337f | 1395 | if (name == conv_op_identifier) |
1396 | { | |
1397 | /* Install the marker prefix. */ | |
1398 | *slot = ovl_make (conv_op_marker, NULL_TREE); | |
1399 | slot = &OVL_CHAIN (*slot); | |
1400 | } | |
1401 | ||
1402 | return slot; | |
1403 | } | |
1404 | ||
b44d8617 | 1405 | /* Comparison function to compare two MEMBER_VEC entries by name. |
1406 | Because we can have duplicates during insertion of TYPE_FIELDS, we | |
1407 | do extra checking so deduping doesn't have to deal with so many | |
1408 | cases. */ | |
c8c010c3 | 1409 | |
1410 | static int | |
b44d8617 | 1411 | member_name_cmp (const void *a_p, const void *b_p) |
c8c010c3 | 1412 | { |
1413 | tree a = *(const tree *)a_p; | |
1414 | tree b = *(const tree *)b_p; | |
1415 | tree name_a = DECL_NAME (TREE_CODE (a) == OVERLOAD ? OVL_FUNCTION (a) : a); | |
1416 | tree name_b = DECL_NAME (TREE_CODE (b) == OVERLOAD ? OVL_FUNCTION (b) : b); | |
1417 | ||
7c06dc60 | 1418 | gcc_checking_assert (name_a && name_b); |
1419 | if (name_a != name_b) | |
1420 | return name_a < name_b ? -1 : +1; | |
1421 | ||
1422 | if (name_a == conv_op_identifier) | |
1423 | { | |
1424 | /* Strip the conv-op markers. */ | |
1425 | gcc_checking_assert (OVL_FUNCTION (a) == conv_op_marker | |
1426 | && OVL_FUNCTION (b) == conv_op_marker); | |
1427 | a = OVL_CHAIN (a); | |
1428 | b = OVL_CHAIN (b); | |
1429 | } | |
1430 | ||
1431 | if (TREE_CODE (a) == OVERLOAD) | |
1432 | a = OVL_FUNCTION (a); | |
1433 | if (TREE_CODE (b) == OVERLOAD) | |
1434 | b = OVL_FUNCTION (b); | |
1435 | ||
1436 | /* We're in STAT_HACK or USING_DECL territory (or possibly error-land). */ | |
0ea6df15 | 1437 | if (TREE_CODE (a) != TREE_CODE (b)) |
1438 | { | |
1439 | /* If one of them is a TYPE_DECL, it loses. */ | |
1440 | if (TREE_CODE (a) == TYPE_DECL) | |
1441 | return +1; | |
1442 | else if (TREE_CODE (b) == TYPE_DECL) | |
1443 | return -1; | |
1444 | ||
1445 | /* If one of them is a USING_DECL, it loses. */ | |
1446 | if (TREE_CODE (a) == USING_DECL) | |
1447 | return +1; | |
1448 | else if (TREE_CODE (b) == USING_DECL) | |
1449 | return -1; | |
1450 | ||
1451 | /* There are no other cases with different kinds of decls, as | |
1452 | duplicate detection should have kicked in earlier. However, | |
1453 | some erroneous cases get though. */ | |
1454 | gcc_assert (errorcount); | |
1455 | } | |
1456 | ||
1457 | /* Using source location would be the best thing here, but we can | |
1458 | get identically-located decls in the following circumstances: | |
1459 | ||
1460 | 1) duplicate artificial type-decls for the same type. | |
1461 | ||
1462 | 2) pack expansions of using-decls. | |
1463 | ||
1464 | We should not be doing #1, but in either case it doesn't matter | |
1465 | how we order these. Use UID as a proxy for source ordering, so | |
1466 | that identically-located decls still have a well-defined stable | |
1467 | ordering. */ | |
1468 | return DECL_UID (a) < DECL_UID (b) ? -1 : +1; | |
c8c010c3 | 1469 | } |
1470 | ||
7904fe55 | 1471 | static struct { |
1472 | gt_pointer_operator new_value; | |
1473 | void *cookie; | |
1474 | } resort_data; | |
1475 | ||
b44d8617 | 1476 | /* This routine compares two fields like member_name_cmp but using the |
c8c010c3 | 1477 | pointer operator in resort_field_decl_data. We don't have to deal |
1478 | with duplicates here. */ | |
7904fe55 | 1479 | |
1480 | static int | |
b44d8617 | 1481 | resort_member_name_cmp (const void *a_p, const void *b_p) |
7904fe55 | 1482 | { |
c8c010c3 | 1483 | tree a = *(const tree *)a_p; |
1484 | tree b = *(const tree *)b_p; | |
1485 | tree name_a = OVL_NAME (a); | |
1486 | tree name_b = OVL_NAME (b); | |
7904fe55 | 1487 | |
c8c010c3 | 1488 | resort_data.new_value (&name_a, resort_data.cookie); |
1489 | resort_data.new_value (&name_b, resort_data.cookie); | |
7904fe55 | 1490 | |
c8c010c3 | 1491 | gcc_checking_assert (name_a != name_b); |
7904fe55 | 1492 | |
c8c010c3 | 1493 | return name_a < name_b ? -1 : +1; |
7904fe55 | 1494 | } |
1495 | ||
b44d8617 | 1496 | /* Resort CLASSTYPE_MEMBER_VEC because pointers have been reordered. */ |
7904fe55 | 1497 | |
1498 | void | |
b44d8617 | 1499 | resort_type_member_vec (void *obj, void */*orig_obj*/, |
c8c010c3 | 1500 | gt_pointer_operator new_value, void* cookie) |
7904fe55 | 1501 | { |
b44d8617 | 1502 | if (vec<tree, va_gc> *member_vec = (vec<tree, va_gc> *) obj) |
7904fe55 | 1503 | { |
1504 | resort_data.new_value = new_value; | |
1505 | resort_data.cookie = cookie; | |
b44d8617 | 1506 | qsort (member_vec->address (), member_vec->length (), |
1507 | sizeof (tree), resort_member_name_cmp); | |
7904fe55 | 1508 | } |
1509 | } | |
1510 | ||
b6a9b2f6 | 1511 | /* Recursively count the number of fields in KLASS, including anonymous |
1512 | union members. */ | |
2ecceb78 | 1513 | |
b6a9b2f6 | 1514 | static unsigned |
1515 | count_class_fields (tree klass) | |
2ecceb78 | 1516 | { |
b6a9b2f6 | 1517 | unsigned n_fields = 0; |
1518 | ||
1519 | for (tree fields = TYPE_FIELDS (klass); fields; fields = DECL_CHAIN (fields)) | |
1520 | if (DECL_DECLARES_FUNCTION_P (fields)) | |
1521 | /* Functions are dealt with separately. */; | |
1522 | else if (TREE_CODE (fields) == FIELD_DECL | |
1523 | && ANON_AGGR_TYPE_P (TREE_TYPE (fields))) | |
1524 | n_fields += count_class_fields (TREE_TYPE (fields)); | |
1525 | else if (DECL_NAME (fields)) | |
1526 | n_fields += 1; | |
1527 | ||
a7dd9a0d | 1528 | return n_fields; |
2ecceb78 | 1529 | } |
1530 | ||
b44d8617 | 1531 | /* Append all the nonfunction members fields of KLASS to MEMBER_VEC. |
1532 | Recurse for anonymous members. MEMBER_VEC must have space. */ | |
a7dd9a0d | 1533 | |
7c06dc60 | 1534 | static void |
b44d8617 | 1535 | member_vec_append_class_fields (vec<tree, va_gc> *member_vec, tree klass) |
a7dd9a0d | 1536 | { |
b6a9b2f6 | 1537 | for (tree fields = TYPE_FIELDS (klass); fields; fields = DECL_CHAIN (fields)) |
1538 | if (DECL_DECLARES_FUNCTION_P (fields)) | |
1539 | /* Functions are handled separately. */; | |
1540 | else if (TREE_CODE (fields) == FIELD_DECL | |
1541 | && ANON_AGGR_TYPE_P (TREE_TYPE (fields))) | |
b44d8617 | 1542 | member_vec_append_class_fields (member_vec, TREE_TYPE (fields)); |
b6a9b2f6 | 1543 | else if (DECL_NAME (fields)) |
7c06dc60 | 1544 | { |
1545 | tree field = fields; | |
1546 | /* Mark a conv-op USING_DECL with the conv-op-marker. */ | |
1547 | if (TREE_CODE (field) == USING_DECL | |
1548 | && IDENTIFIER_CONV_OP_P (DECL_NAME (field))) | |
1549 | field = ovl_make (conv_op_marker, field); | |
b44d8617 | 1550 | member_vec->quick_push (field); |
7c06dc60 | 1551 | } |
a7dd9a0d | 1552 | } |
1553 | ||
b44d8617 | 1554 | /* Append all of the enum values of ENUMTYPE to MEMBER_VEC. |
1555 | MEMBER_VEC must have space. */ | |
a7dd9a0d | 1556 | |
7c06dc60 | 1557 | static void |
b44d8617 | 1558 | member_vec_append_enum_values (vec<tree, va_gc> *member_vec, tree enumtype) |
a7dd9a0d | 1559 | { |
b6a9b2f6 | 1560 | for (tree values = TYPE_VALUES (enumtype); |
1561 | values; values = TREE_CHAIN (values)) | |
b44d8617 | 1562 | member_vec->quick_push (TREE_VALUE (values)); |
7c06dc60 | 1563 | } |
1564 | ||
b44d8617 | 1565 | /* MEMBER_VEC has just had new DECLs added to it, but is sorted. |
7c06dc60 | 1566 | DeDup adjacent DECLS of the same name. We already dealt with |
1567 | conflict resolution when adding the fields or methods themselves. | |
1568 | There are three cases (which could all be combined): | |
1569 | 1) a TYPE_DECL and non TYPE_DECL. Deploy STAT_HACK as appropriate. | |
1570 | 2) a USING_DECL and an overload. If the USING_DECL is dependent, | |
1571 | it wins. Otherwise the OVERLOAD does. | |
1572 | 3) two USING_DECLS. ... | |
1573 | ||
b44d8617 | 1574 | member_name_cmp will have ordered duplicates as |
7c06dc60 | 1575 | <fns><using><type> */ |
1576 | ||
1577 | static void | |
b44d8617 | 1578 | member_vec_dedup (vec<tree, va_gc> *member_vec) |
7c06dc60 | 1579 | { |
b44d8617 | 1580 | unsigned len = member_vec->length (); |
7c06dc60 | 1581 | unsigned store = 0; |
1582 | ||
b44d8617 | 1583 | tree current = (*member_vec)[0], name = OVL_NAME (current); |
7c06dc60 | 1584 | tree next = NULL_TREE, next_name = NULL_TREE; |
1585 | for (unsigned jx, ix = 0; ix < len; | |
1586 | ix = jx, current = next, name = next_name) | |
1587 | { | |
1588 | tree to_type = NULL_TREE; | |
1589 | tree to_using = NULL_TREE; | |
1590 | tree marker = NULL_TREE; | |
1591 | if (IDENTIFIER_CONV_OP_P (name)) | |
1592 | { | |
1593 | marker = current; | |
1594 | current = OVL_CHAIN (current); | |
1595 | name = DECL_NAME (OVL_FUNCTION (marker)); | |
1596 | gcc_checking_assert (name == conv_op_identifier); | |
1597 | } | |
1598 | ||
1599 | if (TREE_CODE (current) == USING_DECL) | |
1600 | { | |
1601 | current = strip_using_decl (current); | |
1602 | if (is_overloaded_fn (current)) | |
1603 | current = NULL_TREE; | |
1604 | else if (TREE_CODE (current) == USING_DECL) | |
1605 | { | |
1606 | to_using = current; | |
1607 | current = NULL_TREE; | |
1608 | } | |
1609 | } | |
1610 | ||
1611 | if (current && DECL_DECLARES_TYPE_P (current)) | |
1612 | { | |
1613 | to_type = current; | |
1614 | current = NULL_TREE; | |
1615 | } | |
b6a9b2f6 | 1616 | |
7c06dc60 | 1617 | for (jx = ix + 1; jx < len; jx++) |
1618 | { | |
b44d8617 | 1619 | next = (*member_vec)[jx]; |
7c06dc60 | 1620 | next_name = OVL_NAME (next); |
1621 | if (next_name != name) | |
1622 | break; | |
1623 | ||
1624 | if (marker) | |
1625 | { | |
1626 | gcc_checking_assert (OVL_FUNCTION (marker) | |
1627 | == OVL_FUNCTION (next)); | |
1628 | next = OVL_CHAIN (next); | |
1629 | } | |
1630 | ||
1631 | if (TREE_CODE (next) == USING_DECL) | |
1632 | { | |
1633 | next = strip_using_decl (next); | |
1634 | if (is_overloaded_fn (next)) | |
1635 | next = NULL_TREE; | |
1636 | else if (TREE_CODE (next) == USING_DECL) | |
1637 | { | |
1638 | to_using = next; | |
1639 | next = NULL_TREE; | |
1640 | } | |
1641 | } | |
1642 | ||
1643 | if (next && DECL_DECLARES_TYPE_P (next)) | |
1644 | to_type = next; | |
1645 | } | |
1646 | ||
1647 | if (to_using) | |
1648 | { | |
1649 | if (!current) | |
1650 | current = to_using; | |
1651 | else | |
1652 | current = ovl_make (to_using, current); | |
1653 | } | |
1654 | ||
1655 | if (to_type) | |
1656 | { | |
1657 | if (!current) | |
1658 | current = to_type; | |
1659 | else | |
1660 | current = stat_hack (current, to_type); | |
1661 | } | |
1662 | ||
1663 | gcc_assert (current); | |
1664 | if (marker) | |
1665 | { | |
1666 | OVL_CHAIN (marker) = current; | |
1667 | current = marker; | |
1668 | } | |
b44d8617 | 1669 | (*member_vec)[store++] = current; |
7c06dc60 | 1670 | } |
1671 | ||
1672 | while (store++ < len) | |
b44d8617 | 1673 | member_vec->pop (); |
a7dd9a0d | 1674 | } |
1675 | ||
b44d8617 | 1676 | /* Add the non-function members to CLASSTYPE_MEMBER_VEC. If there is |
1677 | no existing MEMBER_VEC and fewer than 8 fields, do nothing. We | |
7c06dc60 | 1678 | know there must be at least 1 field -- the self-reference |
1679 | TYPE_DECL, except for anon aggregates, which will have at least | |
1680 | one field. */ | |
2ecceb78 | 1681 | |
1682 | void | |
7c06dc60 | 1683 | set_class_bindings (tree klass, unsigned extra) |
2ecceb78 | 1684 | { |
7c06dc60 | 1685 | unsigned n_fields = count_class_fields (klass); |
b44d8617 | 1686 | vec<tree, va_gc> *member_vec = CLASSTYPE_MEMBER_VEC (klass); |
7904fe55 | 1687 | |
b44d8617 | 1688 | if (member_vec || n_fields >= 8) |
a7dd9a0d | 1689 | { |
7c06dc60 | 1690 | /* Append the new fields. */ |
b44d8617 | 1691 | vec_safe_reserve_exact (member_vec, extra + n_fields); |
1692 | member_vec_append_class_fields (member_vec, klass); | |
7c06dc60 | 1693 | } |
1694 | ||
b44d8617 | 1695 | if (member_vec) |
7c06dc60 | 1696 | { |
b44d8617 | 1697 | CLASSTYPE_MEMBER_VEC (klass) = member_vec; |
1698 | qsort (member_vec->address (), member_vec->length (), | |
1699 | sizeof (tree), member_name_cmp); | |
1700 | member_vec_dedup (member_vec); | |
a7dd9a0d | 1701 | } |
2ecceb78 | 1702 | } |
1703 | ||
a7dd9a0d | 1704 | /* Insert lately defined enum ENUMTYPE into KLASS for the sorted case. */ |
2ecceb78 | 1705 | |
1706 | void | |
fa01f3de | 1707 | insert_late_enum_def_bindings (tree klass, tree enumtype) |
2ecceb78 | 1708 | { |
7c06dc60 | 1709 | int n_fields; |
b44d8617 | 1710 | vec<tree, va_gc> *member_vec = CLASSTYPE_MEMBER_VEC (klass); |
b6a9b2f6 | 1711 | |
7c06dc60 | 1712 | /* The enum bindings will already be on the TYPE_FIELDS, so don't |
b6a9b2f6 | 1713 | count them twice. */ |
b44d8617 | 1714 | if (!member_vec) |
b6a9b2f6 | 1715 | n_fields = count_class_fields (klass); |
7c06dc60 | 1716 | else |
1717 | n_fields = list_length (TYPE_VALUES (enumtype)); | |
b6a9b2f6 | 1718 | |
b44d8617 | 1719 | if (member_vec || n_fields >= 8) |
a7dd9a0d | 1720 | { |
b44d8617 | 1721 | vec_safe_reserve_exact (member_vec, n_fields); |
1722 | if (CLASSTYPE_MEMBER_VEC (klass)) | |
1723 | member_vec_append_enum_values (member_vec, enumtype); | |
b6a9b2f6 | 1724 | else |
b44d8617 | 1725 | member_vec_append_class_fields (member_vec, klass); |
1726 | CLASSTYPE_MEMBER_VEC (klass) = member_vec; | |
1727 | qsort (member_vec->address (), member_vec->length (), | |
1728 | sizeof (tree), member_name_cmp); | |
1729 | member_vec_dedup (member_vec); | |
a7dd9a0d | 1730 | } |
2ecceb78 | 1731 | } |
1732 | ||
4fd9bd13 | 1733 | /* Compute the chain index of a binding_entry given the HASH value of its |
1734 | name and the total COUNT of chains. COUNT is assumed to be a power | |
1735 | of 2. */ | |
263df831 | 1736 | |
4fd9bd13 | 1737 | #define ENTRY_INDEX(HASH, COUNT) (((HASH) >> 3) & ((COUNT) - 1)) |
3bd975bc | 1738 | |
4fd9bd13 | 1739 | /* A free list of "binding_entry"s awaiting for re-use. */ |
3bd975bc | 1740 | |
4fd9bd13 | 1741 | static GTY((deletable)) binding_entry free_binding_entry = NULL; |
9031d10b | 1742 | |
4fd9bd13 | 1743 | /* The binding oracle; see cp-tree.h. */ |
3bd975bc | 1744 | |
4fd9bd13 | 1745 | cp_binding_oracle_function *cp_binding_oracle; |
6198e8f6 | 1746 | |
4fd9bd13 | 1747 | /* If we have a binding oracle, ask it for all namespace-scoped |
1748 | definitions of NAME. */ | |
807f85cf | 1749 | |
4fd9bd13 | 1750 | static inline void |
1751 | query_oracle (tree name) | |
807f85cf | 1752 | { |
4fd9bd13 | 1753 | if (!cp_binding_oracle) |
1754 | return; | |
807f85cf | 1755 | |
4fd9bd13 | 1756 | /* LOOKED_UP holds the set of identifiers that we have already |
1757 | looked up with the oracle. */ | |
1758 | static hash_set<tree> looked_up; | |
1759 | if (looked_up.add (name)) | |
1760 | return; | |
6198e8f6 | 1761 | |
4fd9bd13 | 1762 | cp_binding_oracle (CP_ORACLE_IDENTIFIER, name); |
3bd975bc | 1763 | } |
836495aa | 1764 | |
4fd9bd13 | 1765 | /* Create a binding_entry object for (NAME, TYPE). */ |
836495aa | 1766 | |
4fd9bd13 | 1767 | static inline binding_entry |
1768 | binding_entry_make (tree name, tree type) | |
836495aa | 1769 | { |
4fd9bd13 | 1770 | binding_entry entry; |
08e8bd10 | 1771 | |
4fd9bd13 | 1772 | if (free_binding_entry) |
836495aa | 1773 | { |
4fd9bd13 | 1774 | entry = free_binding_entry; |
1775 | free_binding_entry = entry->chain; | |
836495aa | 1776 | } |
9031d10b | 1777 | else |
4fd9bd13 | 1778 | entry = ggc_alloc<binding_entry_s> (); |
836495aa | 1779 | |
4fd9bd13 | 1780 | entry->name = name; |
1781 | entry->type = type; | |
1782 | entry->chain = NULL; | |
9a49d46b | 1783 | |
4fd9bd13 | 1784 | return entry; |
1785 | } | |
9a49d46b | 1786 | |
4fd9bd13 | 1787 | /* Put ENTRY back on the free list. */ |
1788 | #if 0 | |
1789 | static inline void | |
1790 | binding_entry_free (binding_entry entry) | |
9a49d46b | 1791 | { |
4fd9bd13 | 1792 | entry->name = NULL; |
1793 | entry->type = NULL; | |
1794 | entry->chain = free_binding_entry; | |
1795 | free_binding_entry = entry; | |
1796 | } | |
1797 | #endif | |
9a49d46b | 1798 | |
4fd9bd13 | 1799 | /* The datatype used to implement the mapping from names to types at |
1800 | a given scope. */ | |
1801 | struct GTY(()) binding_table_s { | |
1802 | /* Array of chains of "binding_entry"s */ | |
1803 | binding_entry * GTY((length ("%h.chain_count"))) chain; | |
68023786 | 1804 | |
4fd9bd13 | 1805 | /* The number of chains in this table. This is the length of the |
1806 | member "chain" considered as an array. */ | |
1807 | size_t chain_count; | |
9a49d46b | 1808 | |
4fd9bd13 | 1809 | /* Number of "binding_entry"s in this table. */ |
1810 | size_t entry_count; | |
1811 | }; | |
9a49d46b | 1812 | |
4fd9bd13 | 1813 | /* Construct TABLE with an initial CHAIN_COUNT. */ |
9a49d46b | 1814 | |
4fd9bd13 | 1815 | static inline void |
1816 | binding_table_construct (binding_table table, size_t chain_count) | |
1817 | { | |
1818 | table->chain_count = chain_count; | |
1819 | table->entry_count = 0; | |
1820 | table->chain = ggc_cleared_vec_alloc<binding_entry> (table->chain_count); | |
1821 | } | |
9a49d46b | 1822 | |
4fd9bd13 | 1823 | /* Make TABLE's entries ready for reuse. */ |
1824 | #if 0 | |
1825 | static void | |
1826 | binding_table_free (binding_table table) | |
1827 | { | |
1828 | size_t i; | |
1829 | size_t count; | |
9a49d46b | 1830 | |
4fd9bd13 | 1831 | if (table == NULL) |
1832 | return; | |
9a49d46b | 1833 | |
4fd9bd13 | 1834 | for (i = 0, count = table->chain_count; i < count; ++i) |
1835 | { | |
1836 | binding_entry temp = table->chain[i]; | |
1837 | while (temp != NULL) | |
9a49d46b | 1838 | { |
4fd9bd13 | 1839 | binding_entry entry = temp; |
1840 | temp = entry->chain; | |
1841 | binding_entry_free (entry); | |
9a49d46b | 1842 | } |
4fd9bd13 | 1843 | table->chain[i] = NULL; |
1844 | } | |
1845 | table->entry_count = 0; | |
1846 | } | |
1847 | #endif | |
9a49d46b | 1848 | |
4fd9bd13 | 1849 | /* Allocate a table with CHAIN_COUNT, assumed to be a power of two. */ |
9a49d46b | 1850 | |
4fd9bd13 | 1851 | static inline binding_table |
1852 | binding_table_new (size_t chain_count) | |
1853 | { | |
1854 | binding_table table = ggc_alloc<binding_table_s> (); | |
1855 | table->chain = NULL; | |
1856 | binding_table_construct (table, chain_count); | |
1857 | return table; | |
1858 | } | |
9a49d46b | 1859 | |
4fd9bd13 | 1860 | /* Expand TABLE to twice its current chain_count. */ |
9a49d46b | 1861 | |
4fd9bd13 | 1862 | static void |
1863 | binding_table_expand (binding_table table) | |
1864 | { | |
1865 | const size_t old_chain_count = table->chain_count; | |
1866 | const size_t old_entry_count = table->entry_count; | |
1867 | const size_t new_chain_count = 2 * old_chain_count; | |
1868 | binding_entry *old_chains = table->chain; | |
1869 | size_t i; | |
1870 | ||
1871 | binding_table_construct (table, new_chain_count); | |
1872 | for (i = 0; i < old_chain_count; ++i) | |
1873 | { | |
1874 | binding_entry entry = old_chains[i]; | |
1875 | for (; entry != NULL; entry = old_chains[i]) | |
9a49d46b | 1876 | { |
4fd9bd13 | 1877 | const unsigned int hash = IDENTIFIER_HASH_VALUE (entry->name); |
1878 | const size_t j = ENTRY_INDEX (hash, new_chain_count); | |
7db5a284 | 1879 | |
4fd9bd13 | 1880 | old_chains[i] = entry->chain; |
1881 | entry->chain = table->chain[j]; | |
1882 | table->chain[j] = entry; | |
1883 | } | |
1884 | } | |
1885 | table->entry_count = old_entry_count; | |
1886 | } | |
7db5a284 | 1887 | |
4fd9bd13 | 1888 | /* Insert a binding for NAME to TYPE into TABLE. */ |
7db5a284 | 1889 | |
4fd9bd13 | 1890 | static void |
1891 | binding_table_insert (binding_table table, tree name, tree type) | |
1892 | { | |
1893 | const unsigned int hash = IDENTIFIER_HASH_VALUE (name); | |
1894 | const size_t i = ENTRY_INDEX (hash, table->chain_count); | |
1895 | binding_entry entry = binding_entry_make (name, type); | |
9031d10b | 1896 | |
4fd9bd13 | 1897 | entry->chain = table->chain[i]; |
1898 | table->chain[i] = entry; | |
1899 | ++table->entry_count; | |
947f430b | 1900 | |
4fd9bd13 | 1901 | if (3 * table->chain_count < 5 * table->entry_count) |
1902 | binding_table_expand (table); | |
1903 | } | |
9a49d46b | 1904 | |
4fd9bd13 | 1905 | /* Return the binding_entry, if any, that maps NAME. */ |
9031d10b | 1906 | |
4fd9bd13 | 1907 | binding_entry |
1908 | binding_table_find (binding_table table, tree name) | |
1909 | { | |
1910 | const unsigned int hash = IDENTIFIER_HASH_VALUE (name); | |
1911 | binding_entry entry = table->chain[ENTRY_INDEX (hash, table->chain_count)]; | |
9031d10b | 1912 | |
4fd9bd13 | 1913 | while (entry != NULL && entry->name != name) |
1914 | entry = entry->chain; | |
9a49d46b | 1915 | |
4fd9bd13 | 1916 | return entry; |
1917 | } | |
37d43944 | 1918 | |
4fd9bd13 | 1919 | /* Apply PROC -- with DATA -- to all entries in TABLE. */ |
9a49d46b | 1920 | |
4fd9bd13 | 1921 | void |
1922 | binding_table_foreach (binding_table table, bt_foreach_proc proc, void *data) | |
1923 | { | |
1924 | size_t chain_count; | |
1925 | size_t i; | |
9a49d46b | 1926 | |
4fd9bd13 | 1927 | if (!table) |
1928 | return; | |
9a49d46b | 1929 | |
4fd9bd13 | 1930 | chain_count = table->chain_count; |
1931 | for (i = 0; i < chain_count; ++i) | |
1932 | { | |
1933 | binding_entry entry = table->chain[i]; | |
1934 | for (; entry != NULL; entry = entry->chain) | |
1935 | proc (entry, data); | |
1936 | } | |
1937 | } | |
1938 | \f | |
1939 | #ifndef ENABLE_SCOPE_CHECKING | |
1940 | # define ENABLE_SCOPE_CHECKING 0 | |
1941 | #else | |
1942 | # define ENABLE_SCOPE_CHECKING 1 | |
1943 | #endif | |
b97c3ba6 | 1944 | |
4fd9bd13 | 1945 | /* A free list of "cxx_binding"s, connected by their PREVIOUS. */ |
023e1e09 | 1946 | |
4fd9bd13 | 1947 | static GTY((deletable)) cxx_binding *free_bindings; |
023e1e09 | 1948 | |
4fd9bd13 | 1949 | /* Initialize VALUE and TYPE field for BINDING, and set the PREVIOUS |
1950 | field to NULL. */ | |
41771881 | 1951 | |
4fd9bd13 | 1952 | static inline void |
1953 | cxx_binding_init (cxx_binding *binding, tree value, tree type) | |
1954 | { | |
1955 | binding->value = value; | |
1956 | binding->type = type; | |
1957 | binding->previous = NULL; | |
1958 | } | |
9a49d46b | 1959 | |
4fd9bd13 | 1960 | /* (GC)-allocate a binding object with VALUE and TYPE member initialized. */ |
a4e3ffad | 1961 | |
4fd9bd13 | 1962 | static cxx_binding * |
1963 | cxx_binding_make (tree value, tree type) | |
1964 | { | |
1965 | cxx_binding *binding; | |
1966 | if (free_bindings) | |
1967 | { | |
1968 | binding = free_bindings; | |
1969 | free_bindings = binding->previous; | |
1970 | } | |
1971 | else | |
1972 | binding = ggc_alloc<cxx_binding> (); | |
9a49d46b | 1973 | |
4fd9bd13 | 1974 | cxx_binding_init (binding, value, type); |
9a49d46b | 1975 | |
4fd9bd13 | 1976 | return binding; |
1977 | } | |
9a49d46b | 1978 | |
4fd9bd13 | 1979 | /* Put BINDING back on the free list. */ |
9a49d46b | 1980 | |
4fd9bd13 | 1981 | static inline void |
1982 | cxx_binding_free (cxx_binding *binding) | |
1983 | { | |
1984 | binding->scope = NULL; | |
1985 | binding->previous = free_bindings; | |
1986 | free_bindings = binding; | |
1987 | } | |
9a49d46b | 1988 | |
4fd9bd13 | 1989 | /* Create a new binding for NAME (with the indicated VALUE and TYPE |
1990 | bindings) in the class scope indicated by SCOPE. */ | |
9a49d46b | 1991 | |
4fd9bd13 | 1992 | static cxx_binding * |
1993 | new_class_binding (tree name, tree value, tree type, cp_binding_level *scope) | |
1994 | { | |
1995 | cp_class_binding cb = {cxx_binding_make (value, type), name}; | |
1996 | cxx_binding *binding = cb.base; | |
1997 | vec_safe_push (scope->class_shadowed, cb); | |
1998 | binding->scope = scope; | |
1999 | return binding; | |
2000 | } | |
9a49d46b | 2001 | |
4fd9bd13 | 2002 | /* Make DECL the innermost binding for ID. The LEVEL is the binding |
2003 | level at which this declaration is being bound. */ | |
9a49d46b | 2004 | |
4fd9bd13 | 2005 | void |
2006 | push_binding (tree id, tree decl, cp_binding_level* level) | |
2007 | { | |
2008 | cxx_binding *binding; | |
9a49d46b | 2009 | |
4fd9bd13 | 2010 | if (level != class_binding_level) |
2011 | { | |
2012 | binding = cxx_binding_make (decl, NULL_TREE); | |
2013 | binding->scope = level; | |
2014 | } | |
2015 | else | |
2016 | binding = new_class_binding (id, decl, /*type=*/NULL_TREE, level); | |
9a49d46b | 2017 | |
4fd9bd13 | 2018 | /* Now, fill in the binding information. */ |
2019 | binding->previous = IDENTIFIER_BINDING (id); | |
2020 | INHERITED_VALUE_BINDING_P (binding) = 0; | |
2021 | LOCAL_BINDING_P (binding) = (level != class_binding_level); | |
9a49d46b | 2022 | |
4fd9bd13 | 2023 | /* And put it on the front of the list of bindings for ID. */ |
2024 | IDENTIFIER_BINDING (id) = binding; | |
6198e8f6 | 2025 | } |
2026 | ||
4fd9bd13 | 2027 | /* Remove the binding for DECL which should be the innermost binding |
2028 | for ID. */ | |
6198e8f6 | 2029 | |
4fd9bd13 | 2030 | void |
6c2a7aff | 2031 | pop_local_binding (tree id, tree decl) |
6198e8f6 | 2032 | { |
4fd9bd13 | 2033 | cxx_binding *binding; |
c1d4295f | 2034 | |
4fd9bd13 | 2035 | if (id == NULL_TREE) |
2036 | /* It's easiest to write the loops that call this function without | |
2037 | checking whether or not the entities involved have names. We | |
2038 | get here for such an entity. */ | |
2039 | return; | |
c1d4295f | 2040 | |
4fd9bd13 | 2041 | /* Get the innermost binding for ID. */ |
2042 | binding = IDENTIFIER_BINDING (id); | |
9a49d46b | 2043 | |
4fd9bd13 | 2044 | /* The name should be bound. */ |
2045 | gcc_assert (binding != NULL); | |
9a49d46b | 2046 | |
4fd9bd13 | 2047 | /* The DECL will be either the ordinary binding or the type |
2048 | binding for this identifier. Remove that binding. */ | |
2049 | if (binding->value == decl) | |
2050 | binding->value = NULL_TREE; | |
9a49d46b | 2051 | else |
4fd9bd13 | 2052 | { |
2053 | gcc_assert (binding->type == decl); | |
2054 | binding->type = NULL_TREE; | |
2055 | } | |
836495aa | 2056 | |
4fd9bd13 | 2057 | if (!binding->value && !binding->type) |
836495aa | 2058 | { |
4fd9bd13 | 2059 | /* We're completely done with the innermost binding for this |
2060 | identifier. Unhook it from the list of bindings. */ | |
2061 | IDENTIFIER_BINDING (id) = binding->previous; | |
2062 | ||
2063 | /* Add it to the free list. */ | |
2064 | cxx_binding_free (binding); | |
836495aa | 2065 | } |
4fd9bd13 | 2066 | } |
836495aa | 2067 | |
4fd9bd13 | 2068 | /* Remove the bindings for the decls of the current level and leave |
2069 | the current scope. */ | |
836495aa | 2070 | |
4fd9bd13 | 2071 | void |
2072 | pop_bindings_and_leave_scope (void) | |
2073 | { | |
6c2a7aff | 2074 | for (tree t = get_local_decls (); t; t = DECL_CHAIN (t)) |
eb9d4ee4 | 2075 | { |
2076 | tree decl = TREE_CODE (t) == TREE_LIST ? TREE_VALUE (t) : t; | |
2077 | tree name = OVL_NAME (decl); | |
2078 | ||
2079 | pop_local_binding (name, decl); | |
2080 | } | |
2081 | ||
4fd9bd13 | 2082 | leave_scope (); |
836495aa | 2083 | } |
9a49d46b | 2084 | |
4fd9bd13 | 2085 | /* Strip non dependent using declarations. If DECL is dependent, |
2086 | surreptitiously create a typename_type and return it. */ | |
9a49d46b | 2087 | |
2088 | tree | |
4fd9bd13 | 2089 | strip_using_decl (tree decl) |
9a49d46b | 2090 | { |
4fd9bd13 | 2091 | if (decl == NULL_TREE) |
2092 | return NULL_TREE; | |
9a49d46b | 2093 | |
4fd9bd13 | 2094 | while (TREE_CODE (decl) == USING_DECL && !DECL_DEPENDENT_P (decl)) |
2095 | decl = USING_DECL_DECLS (decl); | |
9a49d46b | 2096 | |
4fd9bd13 | 2097 | if (TREE_CODE (decl) == USING_DECL && DECL_DEPENDENT_P (decl) |
2098 | && USING_DECL_TYPENAME_P (decl)) | |
9a49d46b | 2099 | { |
4fd9bd13 | 2100 | /* We have found a type introduced by a using |
2101 | declaration at class scope that refers to a dependent | |
2102 | type. | |
2103 | ||
2104 | using typename :: [opt] nested-name-specifier unqualified-id ; | |
2105 | */ | |
2106 | decl = make_typename_type (TREE_TYPE (decl), | |
2107 | DECL_NAME (decl), | |
2108 | typename_type, tf_error); | |
2109 | if (decl != error_mark_node) | |
2110 | decl = TYPE_NAME (decl); | |
9a49d46b | 2111 | } |
2112 | ||
4fd9bd13 | 2113 | return decl; |
2114 | } | |
9a49d46b | 2115 | |
788172b2 | 2116 | /* Return true if OVL is an overload for an anticipated builtin. */ |
2117 | ||
2118 | static bool | |
2119 | anticipated_builtin_p (tree ovl) | |
2120 | { | |
2121 | if (TREE_CODE (ovl) != OVERLOAD) | |
2122 | return false; | |
2123 | ||
2124 | if (!OVL_HIDDEN_P (ovl)) | |
2125 | return false; | |
2126 | ||
2127 | tree fn = OVL_FUNCTION (ovl); | |
2128 | gcc_checking_assert (DECL_ANTICIPATED (fn)); | |
2129 | ||
2130 | if (DECL_HIDDEN_FRIEND_P (fn)) | |
2131 | return false; | |
2132 | ||
2133 | return true; | |
2134 | } | |
2135 | ||
4fd9bd13 | 2136 | /* BINDING records an existing declaration for a name in the current scope. |
2137 | But, DECL is another declaration for that same identifier in the | |
2138 | same scope. This is the `struct stat' hack whereby a non-typedef | |
2139 | class name or enum-name can be bound at the same level as some other | |
2140 | kind of entity. | |
2141 | 3.3.7/1 | |
8db6f235 | 2142 | |
4fd9bd13 | 2143 | A class name (9.1) or enumeration name (7.2) can be hidden by the |
2144 | name of an object, function, or enumerator declared in the same scope. | |
2145 | If a class or enumeration name and an object, function, or enumerator | |
2146 | are declared in the same scope (in any order) with the same name, the | |
2147 | class or enumeration name is hidden wherever the object, function, or | |
2148 | enumerator name is visible. | |
8db6f235 | 2149 | |
4fd9bd13 | 2150 | It's the responsibility of the caller to check that |
2151 | inserting this name is valid here. Returns nonzero if the new binding | |
2152 | was successful. */ | |
2153 | ||
2154 | static bool | |
2155 | supplement_binding_1 (cxx_binding *binding, tree decl) | |
2156 | { | |
2157 | tree bval = binding->value; | |
2158 | bool ok = true; | |
2159 | tree target_bval = strip_using_decl (bval); | |
2160 | tree target_decl = strip_using_decl (decl); | |
2161 | ||
2162 | if (TREE_CODE (target_decl) == TYPE_DECL && DECL_ARTIFICIAL (target_decl) | |
2163 | && target_decl != target_bval | |
2164 | && (TREE_CODE (target_bval) != TYPE_DECL | |
2165 | /* We allow pushing an enum multiple times in a class | |
2166 | template in order to handle late matching of underlying | |
2167 | type on an opaque-enum-declaration followed by an | |
2168 | enum-specifier. */ | |
2169 | || (processing_template_decl | |
2170 | && TREE_CODE (TREE_TYPE (target_decl)) == ENUMERAL_TYPE | |
2171 | && TREE_CODE (TREE_TYPE (target_bval)) == ENUMERAL_TYPE | |
2172 | && (dependent_type_p (ENUM_UNDERLYING_TYPE | |
2173 | (TREE_TYPE (target_decl))) | |
2174 | || dependent_type_p (ENUM_UNDERLYING_TYPE | |
2175 | (TREE_TYPE (target_bval))))))) | |
2176 | /* The new name is the type name. */ | |
2177 | binding->type = decl; | |
2178 | else if (/* TARGET_BVAL is null when push_class_level_binding moves | |
2179 | an inherited type-binding out of the way to make room | |
2180 | for a new value binding. */ | |
2181 | !target_bval | |
2182 | /* TARGET_BVAL is error_mark_node when TARGET_DECL's name | |
2183 | has been used in a non-class scope prior declaration. | |
2184 | In that case, we should have already issued a | |
2185 | diagnostic; for graceful error recovery purpose, pretend | |
2186 | this was the intended declaration for that name. */ | |
2187 | || target_bval == error_mark_node | |
2188 | /* If TARGET_BVAL is anticipated but has not yet been | |
2189 | declared, pretend it is not there at all. */ | |
788172b2 | 2190 | || anticipated_builtin_p (target_bval)) |
4fd9bd13 | 2191 | binding->value = decl; |
2192 | else if (TREE_CODE (target_bval) == TYPE_DECL | |
2193 | && DECL_ARTIFICIAL (target_bval) | |
2194 | && target_decl != target_bval | |
2195 | && (TREE_CODE (target_decl) != TYPE_DECL | |
2196 | || same_type_p (TREE_TYPE (target_decl), | |
2197 | TREE_TYPE (target_bval)))) | |
9a49d46b | 2198 | { |
4fd9bd13 | 2199 | /* The old binding was a type name. It was placed in |
2200 | VALUE field because it was thought, at the point it was | |
2201 | declared, to be the only entity with such a name. Move the | |
2202 | type name into the type slot; it is now hidden by the new | |
2203 | binding. */ | |
2204 | binding->type = bval; | |
2205 | binding->value = decl; | |
2206 | binding->value_is_inherited = false; | |
9a49d46b | 2207 | } |
4fd9bd13 | 2208 | else if (TREE_CODE (target_bval) == TYPE_DECL |
2209 | && TREE_CODE (target_decl) == TYPE_DECL | |
2210 | && DECL_NAME (target_decl) == DECL_NAME (target_bval) | |
2211 | && binding->scope->kind != sk_class | |
2212 | && (same_type_p (TREE_TYPE (target_decl), TREE_TYPE (target_bval)) | |
2213 | /* If either type involves template parameters, we must | |
2214 | wait until instantiation. */ | |
2215 | || uses_template_parms (TREE_TYPE (target_decl)) | |
2216 | || uses_template_parms (TREE_TYPE (target_bval)))) | |
2217 | /* We have two typedef-names, both naming the same type to have | |
2218 | the same name. In general, this is OK because of: | |
9a49d46b | 2219 | |
4fd9bd13 | 2220 | [dcl.typedef] |
836495aa | 2221 | |
4fd9bd13 | 2222 | In a given scope, a typedef specifier can be used to redefine |
2223 | the name of any type declared in that scope to refer to the | |
2224 | type to which it already refers. | |
836495aa | 2225 | |
4fd9bd13 | 2226 | However, in class scopes, this rule does not apply due to the |
2227 | stricter language in [class.mem] prohibiting redeclarations of | |
2228 | members. */ | |
2229 | ok = false; | |
2230 | /* There can be two block-scope declarations of the same variable, | |
2231 | so long as they are `extern' declarations. However, there cannot | |
2232 | be two declarations of the same static data member: | |
836495aa | 2233 | |
4fd9bd13 | 2234 | [class.mem] |
836495aa | 2235 | |
4fd9bd13 | 2236 | A member shall not be declared twice in the |
2237 | member-specification. */ | |
2238 | else if (VAR_P (target_decl) | |
2239 | && VAR_P (target_bval) | |
2240 | && DECL_EXTERNAL (target_decl) && DECL_EXTERNAL (target_bval) | |
2241 | && !DECL_CLASS_SCOPE_P (target_decl)) | |
2242 | { | |
2243 | duplicate_decls (decl, binding->value, /*newdecl_is_friend=*/false); | |
2244 | ok = false; | |
2245 | } | |
2246 | else if (TREE_CODE (decl) == NAMESPACE_DECL | |
2247 | && TREE_CODE (bval) == NAMESPACE_DECL | |
2248 | && DECL_NAMESPACE_ALIAS (decl) | |
2249 | && DECL_NAMESPACE_ALIAS (bval) | |
2250 | && ORIGINAL_NAMESPACE (bval) == ORIGINAL_NAMESPACE (decl)) | |
2251 | /* [namespace.alias] | |
836495aa | 2252 | |
4fd9bd13 | 2253 | In a declarative region, a namespace-alias-definition can be |
2254 | used to redefine a namespace-alias declared in that declarative | |
2255 | region to refer only to the namespace to which it already | |
2256 | refers. */ | |
2257 | ok = false; | |
4fd9bd13 | 2258 | else |
2259 | { | |
2260 | if (!error_operand_p (bval)) | |
2261 | diagnose_name_conflict (decl, bval); | |
2262 | ok = false; | |
2263 | } | |
836495aa | 2264 | |
4fd9bd13 | 2265 | return ok; |
836495aa | 2266 | } |
2267 | ||
4fd9bd13 | 2268 | /* Diagnose a name conflict between DECL and BVAL. */ |
2269 | ||
836495aa | 2270 | static void |
4fd9bd13 | 2271 | diagnose_name_conflict (tree decl, tree bval) |
2272 | { | |
2273 | if (TREE_CODE (decl) == TREE_CODE (bval) | |
acf2785b | 2274 | && TREE_CODE (decl) != NAMESPACE_DECL |
eb9d4ee4 | 2275 | && !DECL_DECLARES_FUNCTION_P (decl) |
acf2785b | 2276 | && (TREE_CODE (decl) != TYPE_DECL |
2277 | || DECL_ARTIFICIAL (decl) == DECL_ARTIFICIAL (bval)) | |
eb9d4ee4 | 2278 | && CP_DECL_CONTEXT (decl) == CP_DECL_CONTEXT (bval)) |
4fd9bd13 | 2279 | error ("redeclaration of %q#D", decl); |
836495aa | 2280 | else |
4fd9bd13 | 2281 | error ("%q#D conflicts with a previous declaration", decl); |
2282 | ||
2283 | inform (location_of (bval), "previous declaration %q#D", bval); | |
836495aa | 2284 | } |
2285 | ||
4fd9bd13 | 2286 | /* Wrapper for supplement_binding_1. */ |
836495aa | 2287 | |
4fd9bd13 | 2288 | static bool |
2289 | supplement_binding (cxx_binding *binding, tree decl) | |
836495aa | 2290 | { |
4fd9bd13 | 2291 | bool ret; |
2292 | bool subtime = timevar_cond_start (TV_NAME_LOOKUP); | |
2293 | ret = supplement_binding_1 (binding, decl); | |
2294 | timevar_cond_stop (TV_NAME_LOOKUP, subtime); | |
2295 | return ret; | |
836495aa | 2296 | } |
2297 | ||
eb9d4ee4 | 2298 | /* Replace BINDING's current value on its scope's name list with |
2299 | NEWVAL. */ | |
2300 | ||
2301 | static void | |
2302 | update_local_overload (cxx_binding *binding, tree newval) | |
2303 | { | |
2304 | tree *d; | |
2305 | ||
2306 | for (d = &binding->scope->names; ; d = &TREE_CHAIN (*d)) | |
2307 | if (*d == binding->value) | |
2308 | { | |
2309 | /* Stitch new list node in. */ | |
2310 | *d = tree_cons (NULL_TREE, NULL_TREE, TREE_CHAIN (*d)); | |
2311 | break; | |
2312 | } | |
2313 | else if (TREE_CODE (*d) == TREE_LIST && TREE_VALUE (*d) == binding->value) | |
2314 | break; | |
2315 | ||
2316 | TREE_VALUE (*d) = newval; | |
2317 | } | |
2318 | ||
2319 | /* Compares the parameter-type-lists of ONE and TWO and | |
2320 | returns false if they are different. If the DECLs are template | |
2321 | functions, the return types and the template parameter lists are | |
2322 | compared too (DR 565). */ | |
2323 | ||
2324 | static bool | |
2325 | matching_fn_p (tree one, tree two) | |
2326 | { | |
2327 | if (!compparms (TYPE_ARG_TYPES (TREE_TYPE (one)), | |
2328 | TYPE_ARG_TYPES (TREE_TYPE (two)))) | |
2329 | return false; | |
2330 | ||
2331 | if (TREE_CODE (one) == TEMPLATE_DECL | |
2332 | && TREE_CODE (two) == TEMPLATE_DECL) | |
2333 | { | |
2334 | /* Compare template parms. */ | |
2335 | if (!comp_template_parms (DECL_TEMPLATE_PARMS (one), | |
2336 | DECL_TEMPLATE_PARMS (two))) | |
2337 | return false; | |
2338 | ||
2339 | /* And return type. */ | |
2340 | if (!same_type_p (TREE_TYPE (TREE_TYPE (one)), | |
2341 | TREE_TYPE (TREE_TYPE (two)))) | |
2342 | return false; | |
2343 | } | |
2344 | ||
2345 | return true; | |
2346 | } | |
2347 | ||
17d66324 | 2348 | /* Push DECL into nonclass LEVEL BINDING or SLOT. OLD is the current |
bba28d3f | 2349 | binding value (possibly with anticipated builtins stripped). |
2350 | Diagnose conflicts and return updated decl. */ | |
2351 | ||
2352 | static tree | |
17d66324 | 2353 | update_binding (cp_binding_level *level, cxx_binding *binding, tree *slot, |
bba28d3f | 2354 | tree old, tree decl, bool is_friend) |
2355 | { | |
2356 | tree to_val = decl; | |
3ec46e3d | 2357 | tree old_type = slot ? MAYBE_STAT_TYPE (*slot) : binding->type; |
2358 | tree to_type = old_type; | |
bba28d3f | 2359 | |
17d66324 | 2360 | gcc_assert (level->kind == sk_namespace ? !binding |
2361 | : level->kind != sk_class && !slot); | |
bba28d3f | 2362 | if (old == error_mark_node) |
2363 | old = NULL_TREE; | |
2364 | ||
3ec46e3d | 2365 | if (TREE_CODE (decl) == TYPE_DECL && DECL_ARTIFICIAL (decl)) |
2366 | { | |
2367 | tree other = to_type; | |
2368 | ||
2369 | if (old && TREE_CODE (old) == TYPE_DECL && DECL_ARTIFICIAL (old)) | |
2370 | other = old; | |
2371 | ||
2372 | /* Pushing an artificial typedef. See if this matches either | |
2373 | the type slot or the old value slot. */ | |
2374 | if (!other) | |
2375 | ; | |
2376 | else if (same_type_p (TREE_TYPE (other), TREE_TYPE (decl))) | |
2377 | /* Two artificial decls to same type. Do nothing. */ | |
2378 | return other; | |
2379 | else | |
2380 | goto conflict; | |
2381 | ||
2382 | if (old) | |
2383 | { | |
2384 | /* Slide decl into the type slot, keep old unaltered */ | |
2385 | to_type = decl; | |
2386 | to_val = old; | |
2387 | goto done; | |
2388 | } | |
2389 | } | |
2390 | ||
bba28d3f | 2391 | if (old && TREE_CODE (old) == TYPE_DECL && DECL_ARTIFICIAL (old)) |
2392 | { | |
3ec46e3d | 2393 | /* Slide old into the type slot. */ |
bba28d3f | 2394 | to_type = old; |
2395 | old = NULL_TREE; | |
2396 | } | |
2397 | ||
2398 | if (DECL_DECLARES_FUNCTION_P (decl)) | |
2399 | { | |
2400 | if (!old) | |
2401 | ; | |
2402 | else if (OVL_P (old)) | |
2403 | { | |
2404 | for (ovl_iterator iter (old); iter; ++iter) | |
2405 | { | |
2406 | tree fn = *iter; | |
2407 | ||
2408 | if (iter.using_p () && matching_fn_p (fn, decl)) | |
2409 | { | |
2410 | /* If a function declaration in namespace scope or | |
2411 | block scope has the same name and the same | |
2412 | parameter-type- list (8.3.5) as a function | |
2413 | introduced by a using-declaration, and the | |
2414 | declarations do not declare the same function, | |
2415 | the program is ill-formed. [namespace.udecl]/14 */ | |
2416 | if (tree match = duplicate_decls (decl, fn, is_friend)) | |
2417 | return match; | |
2418 | else | |
2419 | /* FIXME: To preserve existing error behavior, we | |
2420 | still push the decl. This might change. */ | |
2421 | diagnose_name_conflict (decl, fn); | |
2422 | } | |
2423 | } | |
2424 | } | |
2425 | else | |
2426 | goto conflict; | |
2427 | ||
9a612744 | 2428 | if (to_type != old_type |
2429 | && warn_shadow | |
2430 | && MAYBE_CLASS_TYPE_P (TREE_TYPE (to_type)) | |
2431 | && !(DECL_IN_SYSTEM_HEADER (decl) | |
2432 | && DECL_IN_SYSTEM_HEADER (to_type))) | |
2433 | warning (OPT_Wshadow, "%q#D hides constructor for %q#D", | |
2434 | decl, to_type); | |
2435 | ||
bba28d3f | 2436 | to_val = ovl_insert (decl, old); |
2437 | } | |
bba28d3f | 2438 | else if (!old) |
2439 | ; | |
bba28d3f | 2440 | else if (TREE_CODE (old) != TREE_CODE (decl)) |
2441 | /* Different kinds of decls conflict. */ | |
2442 | goto conflict; | |
2443 | else if (TREE_CODE (old) == TYPE_DECL) | |
2444 | { | |
3ec46e3d | 2445 | if (same_type_p (TREE_TYPE (old), TREE_TYPE (decl))) |
bba28d3f | 2446 | /* Two type decls to the same type. Do nothing. */ |
2447 | return old; | |
2448 | else | |
2449 | goto conflict; | |
2450 | } | |
2451 | else if (TREE_CODE (old) == NAMESPACE_DECL) | |
2452 | { | |
acf2785b | 2453 | /* Two maybe-aliased namespaces. If they're to the same target |
2454 | namespace, that's ok. */ | |
2455 | if (ORIGINAL_NAMESPACE (old) != ORIGINAL_NAMESPACE (decl)) | |
bba28d3f | 2456 | goto conflict; |
acf2785b | 2457 | |
2458 | /* The new one must be an alias at this point. */ | |
2459 | gcc_assert (DECL_NAMESPACE_ALIAS (decl)); | |
2460 | return old; | |
bba28d3f | 2461 | } |
2462 | else if (TREE_CODE (old) == VAR_DECL) | |
2463 | { | |
2464 | /* There can be two block-scope declarations of the same | |
2465 | variable, so long as they are `extern' declarations. */ | |
2466 | if (!DECL_EXTERNAL (old) || !DECL_EXTERNAL (decl)) | |
2467 | goto conflict; | |
2468 | else if (tree match = duplicate_decls (decl, old, false)) | |
2469 | return match; | |
2470 | else | |
2471 | goto conflict; | |
2472 | } | |
2473 | else | |
2474 | { | |
2475 | conflict: | |
2476 | diagnose_name_conflict (decl, old); | |
2477 | to_val = NULL_TREE; | |
2478 | } | |
2479 | ||
3ec46e3d | 2480 | done: |
bba28d3f | 2481 | if (to_val) |
2482 | { | |
2483 | if (level->kind != sk_namespace | |
2484 | && !to_type && binding->value && OVL_P (to_val)) | |
2485 | update_local_overload (binding, to_val); | |
2486 | else | |
2487 | { | |
2488 | tree to_add = to_val; | |
2489 | ||
2490 | if (level->kind == sk_namespace) | |
2491 | to_add = decl; | |
2492 | else if (to_type == decl) | |
2493 | to_add = decl; | |
2494 | else if (TREE_CODE (to_add) == OVERLOAD) | |
2495 | to_add = build_tree_list (NULL_TREE, to_add); | |
2496 | ||
2497 | add_decl_to_level (level, to_add); | |
2498 | } | |
2499 | ||
17d66324 | 2500 | if (slot) |
2501 | { | |
2502 | if (STAT_HACK_P (*slot)) | |
2503 | { | |
3ec46e3d | 2504 | STAT_TYPE (*slot) = to_type; |
17d66324 | 2505 | STAT_DECL (*slot) = to_val; |
2506 | } | |
2507 | else if (to_type) | |
2508 | *slot = stat_hack (to_val, to_type); | |
2509 | else | |
2510 | *slot = to_val; | |
2511 | } | |
2512 | else | |
2513 | { | |
3ec46e3d | 2514 | binding->type = to_type; |
17d66324 | 2515 | binding->value = to_val; |
2516 | } | |
bba28d3f | 2517 | } |
2518 | ||
2519 | return decl; | |
2520 | } | |
2521 | ||
03b3dcbd | 2522 | /* Map of identifiers to extern C functions (or LISTS thereof). */ |
2523 | ||
2524 | static GTY(()) hash_map<lang_identifier *, tree> *extern_c_fns; | |
2525 | ||
2526 | /* DECL has C linkage. If we have an existing instance, make sure it | |
2527 | has the same exception specification [7.5, 7.6]. If there's no | |
2528 | instance, add DECL to the map. */ | |
2529 | ||
2530 | static void | |
2531 | check_extern_c_conflict (tree decl) | |
2532 | { | |
2533 | /* Ignore artificial or system header decls. */ | |
2534 | if (DECL_ARTIFICIAL (decl) || DECL_IN_SYSTEM_HEADER (decl)) | |
2535 | return; | |
2536 | ||
2537 | if (!extern_c_fns) | |
2538 | extern_c_fns = hash_map<lang_identifier *,tree>::create_ggc (127); | |
2539 | ||
2540 | bool existed; | |
2541 | tree *slot = &extern_c_fns->get_or_insert (DECL_NAME (decl), &existed); | |
2542 | if (!existed) | |
2543 | *slot = decl; | |
2544 | else | |
2545 | { | |
2546 | tree old = *slot; | |
2547 | if (TREE_CODE (old) == TREE_LIST) | |
2548 | old = TREE_VALUE (old); | |
2549 | ||
2550 | int mismatch = 0; | |
2551 | if (DECL_CONTEXT (old) == DECL_CONTEXT (decl)) | |
2552 | ; /* If they're in the same context, we'll have already complained | |
2553 | about a (possible) mismatch, when inserting the decl. */ | |
2554 | else if (!decls_match (decl, old)) | |
2555 | mismatch = 1; | |
2556 | else if (!comp_except_specs (TYPE_RAISES_EXCEPTIONS (TREE_TYPE (old)), | |
2557 | TYPE_RAISES_EXCEPTIONS (TREE_TYPE (decl)), | |
2558 | ce_normal)) | |
2559 | mismatch = -1; | |
2560 | else if (DECL_ASSEMBLER_NAME_SET_P (old)) | |
2561 | SET_DECL_ASSEMBLER_NAME (decl, DECL_ASSEMBLER_NAME (old)); | |
2562 | ||
2563 | if (mismatch) | |
2564 | { | |
2565 | pedwarn (input_location, 0, | |
2566 | "declaration of %q#D with C language linkage", decl); | |
2567 | pedwarn (DECL_SOURCE_LOCATION (old), 0, | |
2568 | "conflicts with previous declaration %q#D", old); | |
2569 | if (mismatch < 0) | |
2570 | pedwarn (input_location, 0, | |
2571 | "due to different exception specifications"); | |
2572 | } | |
2573 | else | |
2574 | /* Chain it on for c_linkage_binding's use. */ | |
2575 | *slot = tree_cons (NULL_TREE, decl, *slot); | |
2576 | } | |
2577 | } | |
2578 | ||
2579 | /* Returns a list of C-linkage decls with the name NAME. Used in | |
2580 | c-family/c-pragma.c to implement redefine_extname pragma. */ | |
2581 | ||
2582 | tree | |
2583 | c_linkage_bindings (tree name) | |
2584 | { | |
2585 | if (extern_c_fns) | |
2586 | if (tree *slot = extern_c_fns->get (name)) | |
2587 | return *slot; | |
2588 | return NULL_TREE; | |
2589 | } | |
2590 | ||
22d17e4f | 2591 | /* DECL is being declared at a local scope. Emit suitable shadow |
2592 | warnings. */ | |
2593 | ||
2594 | static void | |
2595 | check_local_shadow (tree decl) | |
2596 | { | |
2597 | /* Don't complain about the parms we push and then pop | |
2598 | while tentatively parsing a function declarator. */ | |
2599 | if (TREE_CODE (decl) == PARM_DECL && !DECL_CONTEXT (decl)) | |
2600 | return; | |
2601 | ||
2602 | /* Inline decls shadow nothing. */ | |
2603 | if (DECL_FROM_INLINE (decl)) | |
2604 | return; | |
2605 | ||
2606 | /* External decls are something else. */ | |
2607 | if (DECL_EXTERNAL (decl)) | |
2608 | return; | |
2609 | ||
2610 | tree old = NULL_TREE; | |
2611 | cp_binding_level *old_scope = NULL; | |
2612 | if (cxx_binding *binding = outer_binding (DECL_NAME (decl), NULL, true)) | |
2613 | { | |
2614 | old = binding->value; | |
2615 | old_scope = binding->scope; | |
2616 | } | |
2617 | while (old && VAR_P (old) && DECL_DEAD_FOR_LOCAL (old)) | |
2618 | old = DECL_SHADOWED_FOR_VAR (old); | |
2619 | ||
2620 | tree shadowed = NULL_TREE; | |
2621 | if (old | |
2622 | && (TREE_CODE (old) == PARM_DECL | |
2623 | || VAR_P (old) | |
2624 | || (TREE_CODE (old) == TYPE_DECL | |
2625 | && (!DECL_ARTIFICIAL (old) | |
2626 | || TREE_CODE (decl) == TYPE_DECL))) | |
2627 | && (!DECL_ARTIFICIAL (decl) | |
2628 | || DECL_IMPLICIT_TYPEDEF_P (decl) | |
2629 | || (VAR_P (decl) && DECL_ANON_UNION_VAR_P (decl)))) | |
2630 | { | |
2631 | /* DECL shadows a local thing possibly of interest. */ | |
2632 | ||
2633 | /* Don't complain if it's from an enclosing function. */ | |
2634 | if (DECL_CONTEXT (old) == current_function_decl | |
2635 | && TREE_CODE (decl) != PARM_DECL | |
2636 | && TREE_CODE (old) == PARM_DECL) | |
2637 | { | |
2638 | /* Go to where the parms should be and see if we find | |
2639 | them there. */ | |
2640 | cp_binding_level *b = current_binding_level->level_chain; | |
2641 | ||
2642 | if (FUNCTION_NEEDS_BODY_BLOCK (current_function_decl)) | |
2643 | /* Skip the ctor/dtor cleanup level. */ | |
2644 | b = b->level_chain; | |
2645 | ||
2646 | /* ARM $8.3 */ | |
2647 | if (b->kind == sk_function_parms) | |
2648 | { | |
2649 | error ("declaration of %q#D shadows a parameter", decl); | |
2650 | return; | |
2651 | } | |
2652 | } | |
2653 | ||
2654 | /* The local structure or class can't use parameters of | |
2655 | the containing function anyway. */ | |
2656 | if (DECL_CONTEXT (old) != current_function_decl) | |
2657 | { | |
2658 | for (cp_binding_level *scope = current_binding_level; | |
2659 | scope != old_scope; scope = scope->level_chain) | |
2660 | if (scope->kind == sk_class | |
2661 | && !LAMBDA_TYPE_P (scope->this_entity)) | |
2662 | return; | |
2663 | } | |
2664 | /* Error if redeclaring a local declared in a | |
2665 | init-statement or in the condition of an if or | |
2666 | switch statement when the new declaration is in the | |
2667 | outermost block of the controlled statement. | |
2668 | Redeclaring a variable from a for or while condition is | |
2669 | detected elsewhere. */ | |
2670 | else if (VAR_P (old) | |
2671 | && old_scope == current_binding_level->level_chain | |
2672 | && (old_scope->kind == sk_cond || old_scope->kind == sk_for)) | |
2673 | { | |
2674 | error ("redeclaration of %q#D", decl); | |
2675 | inform (DECL_SOURCE_LOCATION (old), | |
2676 | "%q#D previously declared here", old); | |
2677 | return; | |
2678 | } | |
2679 | /* C++11: | |
2680 | 3.3.3/3: The name declared in an exception-declaration (...) | |
2681 | shall not be redeclared in the outermost block of the handler. | |
2682 | 3.3.3/2: A parameter name shall not be redeclared (...) in | |
2683 | the outermost block of any handler associated with a | |
2684 | function-try-block. | |
2685 | 3.4.1/15: The function parameter names shall not be redeclared | |
2686 | in the exception-declaration nor in the outermost block of a | |
2687 | handler for the function-try-block. */ | |
2688 | else if ((TREE_CODE (old) == VAR_DECL | |
2689 | && old_scope == current_binding_level->level_chain | |
2690 | && old_scope->kind == sk_catch) | |
2691 | || (TREE_CODE (old) == PARM_DECL | |
2692 | && (current_binding_level->kind == sk_catch | |
2693 | || current_binding_level->level_chain->kind == sk_catch) | |
2694 | && in_function_try_handler)) | |
2695 | { | |
2696 | if (permerror (input_location, "redeclaration of %q#D", decl)) | |
2697 | inform (DECL_SOURCE_LOCATION (old), | |
2698 | "%q#D previously declared here", old); | |
2699 | return; | |
2700 | } | |
2701 | ||
2702 | /* If '-Wshadow=compatible-local' is specified without other | |
2703 | -Wshadow= flags, we will warn only when the type of the | |
2704 | shadowing variable (DECL) can be converted to that of the | |
2705 | shadowed parameter (OLD_LOCAL). The reason why we only check | |
2706 | if DECL's type can be converted to OLD_LOCAL's type (but not the | |
2707 | other way around) is because when users accidentally shadow a | |
2708 | parameter, more than often they would use the variable | |
2709 | thinking (mistakenly) it's still the parameter. It would be | |
2710 | rare that users would use the variable in the place that | |
2711 | expects the parameter but thinking it's a new decl. */ | |
2712 | ||
2713 | enum opt_code warning_code; | |
2714 | if (warn_shadow) | |
2715 | warning_code = OPT_Wshadow; | |
2716 | else if (warn_shadow_local) | |
2717 | warning_code = OPT_Wshadow_local; | |
2718 | else if (warn_shadow_compatible_local | |
2719 | && can_convert (TREE_TYPE (old), TREE_TYPE (decl), tf_none)) | |
2720 | warning_code = OPT_Wshadow_compatible_local; | |
2721 | else | |
2722 | return; | |
2723 | ||
2724 | const char *msg; | |
2725 | if (TREE_CODE (old) == PARM_DECL) | |
2726 | msg = "declaration of %q#D shadows a parameter"; | |
2727 | else if (is_capture_proxy (old)) | |
2728 | msg = "declaration of %qD shadows a lambda capture"; | |
2729 | else | |
2730 | msg = "declaration of %qD shadows a previous local"; | |
2731 | ||
2732 | if (warning_at (input_location, warning_code, msg, decl)) | |
2733 | { | |
2734 | shadowed = old; | |
2735 | goto inform_shadowed; | |
2736 | } | |
2737 | return; | |
2738 | } | |
2739 | ||
2740 | if (!warn_shadow) | |
2741 | return; | |
2742 | ||
2743 | /* Don't warn for artificial things that are not implicit typedefs. */ | |
2744 | if (DECL_ARTIFICIAL (decl) && !DECL_IMPLICIT_TYPEDEF_P (decl)) | |
2745 | return; | |
2746 | ||
2747 | if (nonlambda_method_basetype ()) | |
2748 | if (tree member = lookup_member (current_nonlambda_class_type (), | |
2749 | DECL_NAME (decl), /*protect=*/0, | |
2750 | /*want_type=*/false, tf_warning_or_error)) | |
2751 | { | |
2752 | member = MAYBE_BASELINK_FUNCTIONS (member); | |
2753 | ||
2754 | /* Warn if a variable shadows a non-function, or the variable | |
2755 | is a function or a pointer-to-function. */ | |
d6cc2ec2 | 2756 | if (!OVL_P (member) |
22d17e4f | 2757 | || TREE_CODE (decl) == FUNCTION_DECL |
2758 | || TYPE_PTRFN_P (TREE_TYPE (decl)) | |
2759 | || TYPE_PTRMEMFUNC_P (TREE_TYPE (decl))) | |
2760 | { | |
2761 | if (warning_at (input_location, OPT_Wshadow, | |
2762 | "declaration of %qD shadows a member of %qT", | |
2763 | decl, current_nonlambda_class_type ()) | |
2764 | && DECL_P (member)) | |
2765 | { | |
2766 | shadowed = member; | |
2767 | goto inform_shadowed; | |
2768 | } | |
2769 | } | |
2770 | return; | |
2771 | } | |
2772 | ||
2773 | /* Now look for a namespace shadow. */ | |
17d66324 | 2774 | old = find_namespace_value (current_namespace, DECL_NAME (decl)); |
22d17e4f | 2775 | if (old |
2776 | && (VAR_P (old) | |
2777 | || (TREE_CODE (old) == TYPE_DECL | |
2778 | && (!DECL_ARTIFICIAL (old) | |
2779 | || TREE_CODE (decl) == TYPE_DECL))) | |
2780 | && !instantiating_current_function_p ()) | |
2781 | /* XXX shadow warnings in outer-more namespaces */ | |
2782 | { | |
2783 | if (warning_at (input_location, OPT_Wshadow, | |
2784 | "declaration of %qD shadows a global declaration", | |
2785 | decl)) | |
2786 | { | |
2787 | shadowed = old; | |
2788 | goto inform_shadowed; | |
2789 | } | |
2790 | return; | |
2791 | } | |
2792 | ||
2793 | return; | |
2794 | ||
2795 | inform_shadowed: | |
2796 | inform (DECL_SOURCE_LOCATION (shadowed), "shadowed declaration is here"); | |
2797 | } | |
2798 | ||
369e5e40 | 2799 | /* DECL is being pushed inside function CTX. Set its context, if |
2800 | needed. */ | |
2801 | ||
2802 | static void | |
2803 | set_decl_context_in_fn (tree ctx, tree decl) | |
2804 | { | |
2805 | if (!DECL_CONTEXT (decl) | |
2806 | /* A local declaration for a function doesn't constitute | |
2807 | nesting. */ | |
2808 | && TREE_CODE (decl) != FUNCTION_DECL | |
2809 | /* A local declaration for an `extern' variable is in the | |
2810 | scope of the current namespace, not the current | |
2811 | function. */ | |
2812 | && !(VAR_P (decl) && DECL_EXTERNAL (decl)) | |
2813 | /* When parsing the parameter list of a function declarator, | |
2814 | don't set DECL_CONTEXT to an enclosing function. When we | |
2815 | push the PARM_DECLs in order to process the function body, | |
2816 | current_binding_level->this_entity will be set. */ | |
2817 | && !(TREE_CODE (decl) == PARM_DECL | |
2818 | && current_binding_level->kind == sk_function_parms | |
2819 | && current_binding_level->this_entity == NULL)) | |
2820 | DECL_CONTEXT (decl) = ctx; | |
2821 | ||
2822 | /* If this is the declaration for a namespace-scope function, | |
2823 | but the declaration itself is in a local scope, mark the | |
2824 | declaration. */ | |
2825 | if (TREE_CODE (decl) == FUNCTION_DECL && DECL_NAMESPACE_SCOPE_P (decl)) | |
2826 | DECL_LOCAL_FUNCTION_P (decl) = 1; | |
2827 | } | |
2828 | ||
2829 | /* DECL is a local-scope decl with linkage. SHADOWED is true if the | |
2830 | name is already bound at the current level. | |
2831 | ||
2832 | [basic.link] If there is a visible declaration of an entity with | |
2833 | linkage having the same name and type, ignoring entities declared | |
2834 | outside the innermost enclosing namespace scope, the block scope | |
2835 | declaration declares that same entity and receives the linkage of | |
2836 | the previous declaration. | |
2837 | ||
2838 | Also, make sure that this decl matches any existing external decl | |
2839 | in the enclosing namespace. */ | |
2840 | ||
2841 | static void | |
2842 | set_local_extern_decl_linkage (tree decl, bool shadowed) | |
2843 | { | |
2844 | tree ns_value = decl; /* Unique marker. */ | |
2845 | ||
2846 | if (!shadowed) | |
2847 | { | |
2848 | tree loc_value = innermost_non_namespace_value (DECL_NAME (decl)); | |
2849 | if (!loc_value) | |
2850 | { | |
2851 | ns_value | |
17d66324 | 2852 | = find_namespace_value (current_namespace, DECL_NAME (decl)); |
369e5e40 | 2853 | loc_value = ns_value; |
2854 | } | |
2855 | if (loc_value == error_mark_node) | |
2856 | loc_value = NULL_TREE; | |
2857 | ||
2858 | for (ovl_iterator iter (loc_value); iter; ++iter) | |
788172b2 | 2859 | if (!iter.hidden_p () |
369e5e40 | 2860 | && (TREE_STATIC (*iter) || DECL_EXTERNAL (*iter)) |
2861 | && decls_match (*iter, decl)) | |
2862 | { | |
2863 | /* The standard only says that the local extern inherits | |
2864 | linkage from the previous decl; in particular, default | |
2865 | args are not shared. Add the decl into a hash table to | |
2866 | make sure only the previous decl in this case is seen | |
2867 | by the middle end. */ | |
2868 | struct cxx_int_tree_map *h; | |
2869 | ||
2870 | /* We inherit the outer decl's linkage. But we're a | |
2871 | different decl. */ | |
2872 | TREE_PUBLIC (decl) = TREE_PUBLIC (*iter); | |
2873 | ||
2874 | if (cp_function_chain->extern_decl_map == NULL) | |
2875 | cp_function_chain->extern_decl_map | |
2876 | = hash_table<cxx_int_tree_map_hasher>::create_ggc (20); | |
2877 | ||
2878 | h = ggc_alloc<cxx_int_tree_map> (); | |
2879 | h->uid = DECL_UID (decl); | |
2880 | h->to = *iter; | |
2881 | cxx_int_tree_map **loc = cp_function_chain->extern_decl_map | |
2882 | ->find_slot (h, INSERT); | |
2883 | *loc = h; | |
2884 | break; | |
2885 | } | |
2886 | } | |
2887 | ||
2888 | if (TREE_PUBLIC (decl)) | |
2889 | { | |
2890 | /* DECL is externally visible. Make sure it matches a matching | |
17d66324 | 2891 | decl in the namespace scope. We only really need to check |
369e5e40 | 2892 | this when inserting the decl, not when we find an existing |
2893 | match in the current scope. However, in practice we're | |
2894 | going to be inserting a new decl in the majority of cases -- | |
2895 | who writes multiple extern decls for the same thing in the | |
2896 | same local scope? Doing it here often avoids a duplicate | |
2897 | namespace lookup. */ | |
2898 | ||
2899 | /* Avoid repeating a lookup. */ | |
2900 | if (ns_value == decl) | |
17d66324 | 2901 | ns_value = find_namespace_value (current_namespace, DECL_NAME (decl)); |
369e5e40 | 2902 | |
2903 | if (ns_value == error_mark_node) | |
2904 | ns_value = NULL_TREE; | |
2905 | ||
2906 | for (ovl_iterator iter (ns_value); iter; ++iter) | |
2907 | { | |
2908 | tree other = *iter; | |
2909 | ||
2910 | if (!(TREE_PUBLIC (other) || DECL_EXTERNAL (other))) | |
2911 | ; /* Not externally visible. */ | |
2912 | else if (DECL_EXTERN_C_P (decl) && DECL_EXTERN_C_P (other)) | |
2913 | ; /* Both are extern "C", we'll check via that mechanism. */ | |
2914 | else if (TREE_CODE (other) != TREE_CODE (decl) | |
2915 | || ((VAR_P (decl) || matching_fn_p (other, decl)) | |
2916 | && !comptypes (TREE_TYPE (decl), TREE_TYPE (other), | |
2917 | COMPARE_REDECLARATION))) | |
2918 | { | |
2919 | if (permerror (DECL_SOURCE_LOCATION (decl), | |
2920 | "local external declaration %q#D", decl)) | |
2921 | inform (DECL_SOURCE_LOCATION (other), | |
2922 | "does not match previous declaration %q#D", other); | |
2923 | break; | |
2924 | } | |
2925 | } | |
2926 | } | |
2927 | } | |
2928 | ||
bba28d3f | 2929 | /* Record DECL as belonging to the current lexical scope. Check for |
2930 | errors (such as an incompatible declaration for the same name | |
2931 | already seen in the same scope). IS_FRIEND is true if DECL is | |
4fd9bd13 | 2932 | declared as a friend. |
836495aa | 2933 | |
bba28d3f | 2934 | Returns either DECL or an old decl for the same name. If an old |
2935 | decl is returned, it may have been smashed to agree with what DECL | |
2936 | says. */ | |
598057ec | 2937 | |
4fd9bd13 | 2938 | static tree |
bba28d3f | 2939 | do_pushdecl (tree decl, bool is_friend) |
598057ec | 2940 | { |
bba28d3f | 2941 | if (decl == error_mark_node) |
4fd9bd13 | 2942 | return error_mark_node; |
836495aa | 2943 | |
bba28d3f | 2944 | if (!DECL_TEMPLATE_PARM_P (decl) && current_function_decl) |
2945 | set_decl_context_in_fn (current_function_decl, decl); | |
9031d10b | 2946 | |
bba28d3f | 2947 | /* The binding level we will be pushing into. During local class |
2948 | pushing, we want to push to the containing scope. */ | |
2949 | cp_binding_level *level = current_binding_level; | |
2950 | while (level->kind == sk_class) | |
2951 | level = level->level_chain; | |
836495aa | 2952 | |
bba28d3f | 2953 | if (tree name = DECL_NAME (decl)) |
836495aa | 2954 | { |
17d66324 | 2955 | cxx_binding *binding = NULL; /* Local scope binding. */ |
bba28d3f | 2956 | tree ns = NULL_TREE; /* Searched namespace. */ |
17d66324 | 2957 | tree *slot = NULL; /* Binding slot in namespace. */ |
bba28d3f | 2958 | tree old = NULL_TREE; |
836495aa | 2959 | |
bba28d3f | 2960 | if (level->kind == sk_namespace) |
4fd9bd13 | 2961 | { |
bba28d3f | 2962 | /* We look in the decl's namespace for an existing |
2963 | declaration, even though we push into the current | |
2964 | namespace. */ | |
2965 | ns = (DECL_NAMESPACE_SCOPE_P (decl) | |
2966 | ? CP_DECL_CONTEXT (decl) : current_namespace); | |
2967 | /* Create the binding, if this is current namespace, because | |
2968 | that's where we'll be pushing anyway. */ | |
17d66324 | 2969 | slot = find_namespace_slot (ns, name, ns == current_namespace); |
2970 | if (slot) | |
2971 | old = MAYBE_STAT_DECL (*slot); | |
4fd9bd13 | 2972 | } |
bba28d3f | 2973 | else |
17d66324 | 2974 | { |
2975 | binding = find_local_binding (level, name); | |
2976 | if (binding) | |
2977 | old = binding->value; | |
2978 | } | |
836495aa | 2979 | |
bba28d3f | 2980 | if (current_function_decl && VAR_OR_FUNCTION_DECL_P (decl) |
2981 | && DECL_EXTERNAL (decl)) | |
2982 | set_local_extern_decl_linkage (decl, old != NULL_TREE); | |
836495aa | 2983 | |
bba28d3f | 2984 | if (old == error_mark_node) |
2985 | old = NULL_TREE; | |
836495aa | 2986 | |
bba28d3f | 2987 | for (ovl_iterator iter (old); iter; ++iter) |
2988 | if (iter.using_p ()) | |
2989 | ; /* Ignore using decls here. */ | |
2990 | else if (tree match = duplicate_decls (decl, *iter, is_friend)) | |
788172b2 | 2991 | { |
a1adbef0 | 2992 | if (match == error_mark_node) |
2993 | ; | |
2994 | else if (TREE_CODE (match) == TYPE_DECL) | |
2995 | /* The IDENTIFIER will have the type referring to the | |
2996 | now-smashed TYPE_DECL, because ...? Reset it. */ | |
2997 | SET_IDENTIFIER_TYPE_VALUE (name, TREE_TYPE (match)); | |
2998 | else if (iter.hidden_p () && !DECL_HIDDEN_P (match)) | |
788172b2 | 2999 | { |
3000 | /* Unhiding a previously hidden decl. */ | |
3001 | tree head = iter.reveal_node (old); | |
3002 | if (head != old) | |
3003 | { | |
3004 | if (!ns) | |
17d66324 | 3005 | { |
3006 | update_local_overload (binding, head); | |
3007 | binding->value = head; | |
3008 | } | |
3009 | else if (STAT_HACK_P (*slot)) | |
3010 | STAT_DECL (*slot) = head; | |
3011 | else | |
3012 | *slot = head; | |
788172b2 | 3013 | } |
788172b2 | 3014 | if (TREE_CODE (match) == FUNCTION_DECL |
3015 | && DECL_EXTERN_C_P (match)) | |
3016 | /* We need to check and register the fn now. */ | |
3017 | check_extern_c_conflict (match); | |
3018 | } | |
3019 | return match; | |
3020 | } | |
9031d10b | 3021 | |
bba28d3f | 3022 | /* We are pushing a new decl. */ |
836495aa | 3023 | |
788172b2 | 3024 | /* Skip a hidden builtin we failed to match already. There can |
3025 | only be one. */ | |
3026 | if (old && anticipated_builtin_p (old)) | |
3027 | old = OVL_CHAIN (old); | |
265a34f4 | 3028 | |
bba28d3f | 3029 | check_template_shadow (decl); |
836495aa | 3030 | |
bba28d3f | 3031 | if (DECL_DECLARES_FUNCTION_P (decl)) |
4fd9bd13 | 3032 | { |
bba28d3f | 3033 | check_default_args (decl); |
836495aa | 3034 | |
bba28d3f | 3035 | if (is_friend) |
4fd9bd13 | 3036 | { |
bba28d3f | 3037 | if (level->kind != sk_namespace) |
3038 | /* In a local class, a friend function declaration must | |
3039 | find a matching decl in the innermost non-class scope. | |
3040 | [class.friend/11] */ | |
3041 | error ("friend declaration %qD in local class without " | |
3042 | "prior local declaration", decl); | |
3043 | else if (!flag_friend_injection) | |
3044 | /* Hide it from ordinary lookup. */ | |
3045 | DECL_ANTICIPATED (decl) = DECL_HIDDEN_FRIEND_P (decl) = true; | |
4fd9bd13 | 3046 | } |
3047 | } | |
836495aa | 3048 | |
bba28d3f | 3049 | if (level->kind != sk_namespace) |
4fd9bd13 | 3050 | { |
bba28d3f | 3051 | check_local_shadow (decl); |
836495aa | 3052 | |
bba28d3f | 3053 | if (TREE_CODE (decl) == NAMESPACE_DECL) |
3054 | /* A local namespace alias. */ | |
3055 | set_identifier_type_value (name, NULL_TREE); | |
836495aa | 3056 | |
bba28d3f | 3057 | if (!binding) |
3058 | binding = create_local_binding (level, name); | |
4fd9bd13 | 3059 | } |
17d66324 | 3060 | else if (!slot) |
4fd9bd13 | 3061 | { |
bba28d3f | 3062 | ns = current_namespace; |
17d66324 | 3063 | slot = find_namespace_slot (ns, name, true); |
4fbdcec5 | 3064 | /* Update OLD to reflect the namespace we're going to be |
3065 | pushing into. */ | |
3066 | old = MAYBE_STAT_DECL (*slot); | |
4fd9bd13 | 3067 | } |
fa8ed26b | 3068 | |
17d66324 | 3069 | old = update_binding (level, binding, slot, old, decl, is_friend); |
fa8ed26b | 3070 | |
bba28d3f | 3071 | if (old != decl) |
3072 | /* An existing decl matched, use it. */ | |
3073 | decl = old; | |
3074 | else if (TREE_CODE (decl) == TYPE_DECL) | |
3075 | { | |
3076 | tree type = TREE_TYPE (decl); | |
836495aa | 3077 | |
bba28d3f | 3078 | if (type != error_mark_node) |
4fd9bd13 | 3079 | { |
bba28d3f | 3080 | if (TYPE_NAME (type) != decl) |
3081 | set_underlying_type (decl); | |
836495aa | 3082 | |
bba28d3f | 3083 | if (!ns) |
3084 | set_identifier_type_value_with_scope (name, decl, level); | |
4fd9bd13 | 3085 | else |
bba28d3f | 3086 | SET_IDENTIFIER_TYPE_VALUE (name, global_type_node); |
4fd9bd13 | 3087 | } |
c7d89805 | 3088 | |
bba28d3f | 3089 | /* If this is a locally defined typedef in a function that |
3090 | is not a template instantation, record it to implement | |
3091 | -Wunused-local-typedefs. */ | |
3092 | if (!instantiating_current_function_p ()) | |
3093 | record_locally_defined_typedef (decl); | |
3094 | } | |
3095 | else if (VAR_P (decl)) | |
3096 | maybe_register_incomplete_var (decl); | |
3097 | else if (TREE_CODE (decl) == FUNCTION_DECL && DECL_EXTERN_C_P (decl)) | |
3098 | check_extern_c_conflict (decl); | |
836495aa | 3099 | } |
bba28d3f | 3100 | else |
3101 | add_decl_to_level (level, decl); | |
836495aa | 3102 | |
bba28d3f | 3103 | return decl; |
836495aa | 3104 | } |
3105 | ||
2e33aaef | 3106 | /* Record a decl-node X as belonging to the current lexical scope. |
41ff145b | 3107 | It's a friend if IS_FRIEND is true -- which affects exactly where |
3108 | we push it. */ | |
6198e8f6 | 3109 | |
3110 | tree | |
2e33aaef | 3111 | pushdecl (tree x, bool is_friend) |
6198e8f6 | 3112 | { |
4fd9bd13 | 3113 | bool subtime = timevar_cond_start (TV_NAME_LOOKUP); |
41ff145b | 3114 | tree ret = do_pushdecl (x, is_friend); |
4fd9bd13 | 3115 | timevar_cond_stop (TV_NAME_LOOKUP, subtime); |
6198e8f6 | 3116 | return ret; |
3117 | } | |
3118 | ||
4fd9bd13 | 3119 | /* Enter DECL into the symbol table, if that's appropriate. Returns |
3120 | DECL, or a modified version thereof. */ | |
836495aa | 3121 | |
4fd9bd13 | 3122 | tree |
3123 | maybe_push_decl (tree decl) | |
836495aa | 3124 | { |
4fd9bd13 | 3125 | tree type = TREE_TYPE (decl); |
836495aa | 3126 | |
4fd9bd13 | 3127 | /* Add this decl to the current binding level, but not if it comes |
3128 | from another scope, e.g. a static member variable. TEM may equal | |
3129 | DECL or it may be a previous decl of the same name. */ | |
3130 | if (decl == error_mark_node | |
3131 | || (TREE_CODE (decl) != PARM_DECL | |
3132 | && DECL_CONTEXT (decl) != NULL_TREE | |
3133 | /* Definitions of namespace members outside their namespace are | |
3134 | possible. */ | |
3135 | && !DECL_NAMESPACE_SCOPE_P (decl)) | |
3136 | || (TREE_CODE (decl) == TEMPLATE_DECL && !namespace_bindings_p ()) | |
3137 | || type == unknown_type_node | |
3138 | /* The declaration of a template specialization does not affect | |
3139 | the functions available for overload resolution, so we do not | |
3140 | call pushdecl. */ | |
3141 | || (TREE_CODE (decl) == FUNCTION_DECL | |
3142 | && DECL_TEMPLATE_SPECIALIZATION (decl))) | |
3143 | return decl; | |
836495aa | 3144 | else |
4fd9bd13 | 3145 | return pushdecl (decl); |
836495aa | 3146 | } |
3147 | ||
4fd9bd13 | 3148 | /* Bind DECL to ID in the current_binding_level, assumed to be a local |
eb9d4ee4 | 3149 | binding level. If IS_USING is true, DECL got here through a |
3150 | using-declaration. */ | |
836495aa | 3151 | |
eb9d4ee4 | 3152 | static void |
3153 | push_local_binding (tree id, tree decl, bool is_using) | |
836495aa | 3154 | { |
4fd9bd13 | 3155 | /* Skip over any local classes. This makes sense if we call |
3156 | push_local_binding with a friend decl of a local class. */ | |
17d66324 | 3157 | cp_binding_level *b = innermost_nonclass_level (); |
60fadde6 | 3158 | |
17d66324 | 3159 | gcc_assert (b->kind != sk_namespace); |
3160 | if (find_local_binding (b, id)) | |
4fd9bd13 | 3161 | { |
3162 | /* Supplement the existing binding. */ | |
3163 | if (!supplement_binding (IDENTIFIER_BINDING (id), decl)) | |
3164 | /* It didn't work. Something else must be bound at this | |
3165 | level. Do not add DECL to the list of things to pop | |
3166 | later. */ | |
3167 | return; | |
3168 | } | |
3169 | else | |
3170 | /* Create a new binding. */ | |
3171 | push_binding (id, decl, b); | |
cc9a4194 | 3172 | |
eb9d4ee4 | 3173 | if (TREE_CODE (decl) == OVERLOAD || is_using) |
3174 | /* We must put the OVERLOAD or using into a TREE_LIST since we | |
3175 | cannot use the decl's chain itself. */ | |
4fd9bd13 | 3176 | decl = build_tree_list (NULL_TREE, decl); |
cc9a4194 | 3177 | |
4fd9bd13 | 3178 | /* And put DECL on the list of things declared by the current |
3179 | binding level. */ | |
eb9d4ee4 | 3180 | add_decl_to_level (b, decl); |
cc9a4194 | 3181 | } |
3182 | ||
4fd9bd13 | 3183 | /* Check to see whether or not DECL is a variable that would have been |
3184 | in scope under the ARM, but is not in scope under the ANSI/ISO | |
3185 | standard. If so, issue an error message. If name lookup would | |
3186 | work in both cases, but return a different result, this function | |
3187 | returns the result of ANSI/ISO lookup. Otherwise, it returns | |
3188 | DECL. */ | |
cc9a4194 | 3189 | |
4fd9bd13 | 3190 | tree |
3191 | check_for_out_of_scope_variable (tree decl) | |
cc9a4194 | 3192 | { |
4fd9bd13 | 3193 | tree shadowed; |
9031d10b | 3194 | |
4fd9bd13 | 3195 | /* We only care about out of scope variables. */ |
3196 | if (!(VAR_P (decl) && DECL_DEAD_FOR_LOCAL (decl))) | |
3197 | return decl; | |
0ba44b8b | 3198 | |
4fd9bd13 | 3199 | shadowed = DECL_HAS_SHADOWED_FOR_VAR_P (decl) |
3200 | ? DECL_SHADOWED_FOR_VAR (decl) : NULL_TREE ; | |
3201 | while (shadowed != NULL_TREE && VAR_P (shadowed) | |
3202 | && DECL_DEAD_FOR_LOCAL (shadowed)) | |
3203 | shadowed = DECL_HAS_SHADOWED_FOR_VAR_P (shadowed) | |
3204 | ? DECL_SHADOWED_FOR_VAR (shadowed) : NULL_TREE; | |
3205 | if (!shadowed) | |
17d66324 | 3206 | shadowed = find_namespace_value (current_namespace, DECL_NAME (decl)); |
4fd9bd13 | 3207 | if (shadowed) |
3208 | { | |
3209 | if (!DECL_ERROR_REPORTED (decl)) | |
3210 | { | |
3211 | warning (0, "name lookup of %qD changed", DECL_NAME (decl)); | |
3212 | warning_at (DECL_SOURCE_LOCATION (shadowed), 0, | |
3213 | " matches this %qD under ISO standard rules", | |
3214 | shadowed); | |
3215 | warning_at (DECL_SOURCE_LOCATION (decl), 0, | |
3216 | " matches this %qD under old rules", decl); | |
3217 | DECL_ERROR_REPORTED (decl) = 1; | |
3218 | } | |
3219 | return shadowed; | |
3220 | } | |
cc9a4194 | 3221 | |
4fd9bd13 | 3222 | /* If we have already complained about this declaration, there's no |
3223 | need to do it again. */ | |
3224 | if (DECL_ERROR_REPORTED (decl)) | |
3225 | return decl; | |
9a49d46b | 3226 | |
4fd9bd13 | 3227 | DECL_ERROR_REPORTED (decl) = 1; |
9a49d46b | 3228 | |
4fd9bd13 | 3229 | if (TREE_TYPE (decl) == error_mark_node) |
3230 | return decl; | |
9a49d46b | 3231 | |
4fd9bd13 | 3232 | if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (TREE_TYPE (decl))) |
3233 | { | |
3234 | error ("name lookup of %qD changed for ISO %<for%> scoping", | |
3235 | DECL_NAME (decl)); | |
3236 | error (" cannot use obsolete binding at %q+D because " | |
3237 | "it has a destructor", decl); | |
3238 | return error_mark_node; | |
3239 | } | |
3240 | else | |
3241 | { | |
3242 | permerror (input_location, "name lookup of %qD changed for ISO %<for%> scoping", | |
3243 | DECL_NAME (decl)); | |
3244 | if (flag_permissive) | |
3245 | permerror (DECL_SOURCE_LOCATION (decl), | |
3246 | " using obsolete binding at %qD", decl); | |
3247 | else | |
3248 | { | |
3249 | static bool hint; | |
3250 | if (!hint) | |
3251 | { | |
3252 | inform (input_location, "(if you use %<-fpermissive%> G++ will accept your code)"); | |
3253 | hint = true; | |
3254 | } | |
3255 | } | |
3256 | } | |
9a49d46b | 3257 | |
4fd9bd13 | 3258 | return decl; |
9a49d46b | 3259 | } |
4fd9bd13 | 3260 | \f |
3261 | /* true means unconditionally make a BLOCK for the next level pushed. */ | |
9a49d46b | 3262 | |
4fd9bd13 | 3263 | static bool keep_next_level_flag; |
a8b75081 | 3264 | |
4fd9bd13 | 3265 | static int binding_depth = 0; |
a8b75081 | 3266 | |
4fd9bd13 | 3267 | static void |
3268 | indent (int depth) | |
a8b75081 | 3269 | { |
4fd9bd13 | 3270 | int i; |
a8b75081 | 3271 | |
4fd9bd13 | 3272 | for (i = 0; i < depth * 2; i++) |
3273 | putc (' ', stderr); | |
a8b75081 | 3274 | } |
3275 | ||
4fd9bd13 | 3276 | /* Return a string describing the kind of SCOPE we have. */ |
3277 | static const char * | |
3278 | cp_binding_level_descriptor (cp_binding_level *scope) | |
d36ac936 | 3279 | { |
4fd9bd13 | 3280 | /* The order of this table must match the "scope_kind" |
3281 | enumerators. */ | |
3282 | static const char* scope_kind_names[] = { | |
3283 | "block-scope", | |
3284 | "cleanup-scope", | |
3285 | "try-scope", | |
3286 | "catch-scope", | |
3287 | "for-scope", | |
3288 | "function-parameter-scope", | |
3289 | "class-scope", | |
3290 | "namespace-scope", | |
3291 | "template-parameter-scope", | |
3292 | "template-explicit-spec-scope" | |
3293 | }; | |
3294 | const scope_kind kind = scope->explicit_spec_p | |
3295 | ? sk_template_spec : scope->kind; | |
d36ac936 | 3296 | |
4fd9bd13 | 3297 | return scope_kind_names[kind]; |
d36ac936 | 3298 | } |
3299 | ||
4fd9bd13 | 3300 | /* Output a debugging information about SCOPE when performing |
3301 | ACTION at LINE. */ | |
3302 | static void | |
3303 | cp_binding_level_debug (cp_binding_level *scope, int line, const char *action) | |
d36ac936 | 3304 | { |
4fd9bd13 | 3305 | const char *desc = cp_binding_level_descriptor (scope); |
3306 | if (scope->this_entity) | |
8c41abe8 | 3307 | verbatim ("%s %<%s(%E)%> %p %d\n", action, desc, |
4fd9bd13 | 3308 | scope->this_entity, (void *) scope, line); |
3309 | else | |
3310 | verbatim ("%s %s %p %d\n", action, desc, (void *) scope, line); | |
d36ac936 | 3311 | } |
3312 | ||
4fd9bd13 | 3313 | /* Return the estimated initial size of the hashtable of a NAMESPACE |
3314 | scope. */ | |
d36ac936 | 3315 | |
4fd9bd13 | 3316 | static inline size_t |
3317 | namespace_scope_ht_size (tree ns) | |
d36ac936 | 3318 | { |
4fd9bd13 | 3319 | tree name = DECL_NAME (ns); |
d36ac936 | 3320 | |
4fd9bd13 | 3321 | return name == std_identifier |
3322 | ? NAMESPACE_STD_HT_SIZE | |
c99e91fe | 3323 | : (name == global_identifier |
4fd9bd13 | 3324 | ? GLOBAL_SCOPE_HT_SIZE |
3325 | : NAMESPACE_ORDINARY_HT_SIZE); | |
d36ac936 | 3326 | } |
d36ac936 | 3327 | |
4fd9bd13 | 3328 | /* A chain of binding_level structures awaiting reuse. */ |
37d43944 | 3329 | |
4fd9bd13 | 3330 | static GTY((deletable)) cp_binding_level *free_binding_level; |
37d43944 | 3331 | |
4fd9bd13 | 3332 | /* Insert SCOPE as the innermost binding level. */ |
37d43944 | 3333 | |
4fd9bd13 | 3334 | void |
3335 | push_binding_level (cp_binding_level *scope) | |
3336 | { | |
3337 | /* Add it to the front of currently active scopes stack. */ | |
3338 | scope->level_chain = current_binding_level; | |
3339 | current_binding_level = scope; | |
3340 | keep_next_level_flag = false; | |
3341 | ||
3342 | if (ENABLE_SCOPE_CHECKING) | |
37d43944 | 3343 | { |
4fd9bd13 | 3344 | scope->binding_depth = binding_depth; |
3345 | indent (binding_depth); | |
3346 | cp_binding_level_debug (scope, LOCATION_LINE (input_location), | |
3347 | "push"); | |
3348 | binding_depth++; | |
37d43944 | 3349 | } |
37d43944 | 3350 | } |
3351 | ||
4fd9bd13 | 3352 | /* Create a new KIND scope and make it the top of the active scopes stack. |
3353 | ENTITY is the scope of the associated C++ entity (namespace, class, | |
3354 | function, C++0x enumeration); it is NULL otherwise. */ | |
27282252 | 3355 | |
4fd9bd13 | 3356 | cp_binding_level * |
3357 | begin_scope (scope_kind kind, tree entity) | |
27282252 | 3358 | { |
4fd9bd13 | 3359 | cp_binding_level *scope; |
27282252 | 3360 | |
4fd9bd13 | 3361 | /* Reuse or create a struct for this binding level. */ |
3362 | if (!ENABLE_SCOPE_CHECKING && free_binding_level) | |
27282252 | 3363 | { |
4fd9bd13 | 3364 | scope = free_binding_level; |
3365 | free_binding_level = scope->level_chain; | |
3366 | memset (scope, 0, sizeof (cp_binding_level)); | |
27282252 | 3367 | } |
4fd9bd13 | 3368 | else |
3369 | scope = ggc_cleared_alloc<cp_binding_level> (); | |
27282252 | 3370 | |
4fd9bd13 | 3371 | scope->this_entity = entity; |
3372 | scope->more_cleanups_ok = true; | |
3373 | switch (kind) | |
3374 | { | |
3375 | case sk_cleanup: | |
3376 | scope->keep = true; | |
3377 | break; | |
9a49d46b | 3378 | |
4fd9bd13 | 3379 | case sk_template_spec: |
3380 | scope->explicit_spec_p = true; | |
3381 | kind = sk_template_parms; | |
3382 | /* Fall through. */ | |
3383 | case sk_template_parms: | |
3384 | case sk_block: | |
3385 | case sk_try: | |
3386 | case sk_catch: | |
3387 | case sk_for: | |
3388 | case sk_cond: | |
3389 | case sk_class: | |
3390 | case sk_scoped_enum: | |
3391 | case sk_function_parms: | |
3392 | case sk_transaction: | |
3393 | case sk_omp: | |
3394 | scope->keep = keep_next_level_flag; | |
3395 | break; | |
9a49d46b | 3396 | |
4fd9bd13 | 3397 | case sk_namespace: |
3398 | NAMESPACE_LEVEL (entity) = scope; | |
9a49d46b | 3399 | break; |
4fd9bd13 | 3400 | |
3401 | default: | |
3402 | /* Should not happen. */ | |
3403 | gcc_unreachable (); | |
3404 | break; | |
3405 | } | |
3406 | scope->kind = kind; | |
3407 | ||
3408 | push_binding_level (scope); | |
3409 | ||
3410 | return scope; | |
6198e8f6 | 3411 | } |
3412 | ||
4fd9bd13 | 3413 | /* We're about to leave current scope. Pop the top of the stack of |
3414 | currently active scopes. Return the enclosing scope, now active. */ | |
6198e8f6 | 3415 | |
4fd9bd13 | 3416 | cp_binding_level * |
3417 | leave_scope (void) | |
6198e8f6 | 3418 | { |
4fd9bd13 | 3419 | cp_binding_level *scope = current_binding_level; |
9a49d46b | 3420 | |
4fd9bd13 | 3421 | if (scope->kind == sk_namespace && class_binding_level) |
3422 | current_binding_level = class_binding_level; | |
8c23b4ad | 3423 | |
4fd9bd13 | 3424 | /* We cannot leave a scope, if there are none left. */ |
3425 | if (NAMESPACE_LEVEL (global_namespace)) | |
3426 | gcc_assert (!global_scope_p (scope)); | |
d36ac936 | 3427 | |
4fd9bd13 | 3428 | if (ENABLE_SCOPE_CHECKING) |
3429 | { | |
3430 | indent (--binding_depth); | |
3431 | cp_binding_level_debug (scope, LOCATION_LINE (input_location), | |
3432 | "leave"); | |
3433 | } | |
d36ac936 | 3434 | |
4fd9bd13 | 3435 | /* Move one nesting level up. */ |
3436 | current_binding_level = scope->level_chain; | |
3437 | ||
3438 | /* Namespace-scopes are left most probably temporarily, not | |
3439 | completely; they can be reopened later, e.g. in namespace-extension | |
3440 | or any name binding activity that requires us to resume a | |
3441 | namespace. For classes, we cache some binding levels. For other | |
3442 | scopes, we just make the structure available for reuse. */ | |
3443 | if (scope->kind != sk_namespace | |
3444 | && scope->kind != sk_class) | |
836495aa | 3445 | { |
4fd9bd13 | 3446 | scope->level_chain = free_binding_level; |
3447 | gcc_assert (!ENABLE_SCOPE_CHECKING | |
3448 | || scope->binding_depth == binding_depth); | |
3449 | free_binding_level = scope; | |
836495aa | 3450 | } |
4fd9bd13 | 3451 | |
3452 | if (scope->kind == sk_class) | |
836495aa | 3453 | { |
4fd9bd13 | 3454 | /* Reset DEFINING_CLASS_P to allow for reuse of a |
3455 | class-defining scope in a non-defining context. */ | |
3456 | scope->defining_class_p = 0; | |
3457 | ||
3458 | /* Find the innermost enclosing class scope, and reset | |
3459 | CLASS_BINDING_LEVEL appropriately. */ | |
3460 | class_binding_level = NULL; | |
3461 | for (scope = current_binding_level; scope; scope = scope->level_chain) | |
3462 | if (scope->kind == sk_class) | |
3463 | { | |
3464 | class_binding_level = scope; | |
3465 | break; | |
3466 | } | |
836495aa | 3467 | } |
4fd9bd13 | 3468 | |
3469 | return current_binding_level; | |
836495aa | 3470 | } |
6198e8f6 | 3471 | |
4fd9bd13 | 3472 | static void |
3473 | resume_scope (cp_binding_level* b) | |
6198e8f6 | 3474 | { |
4fd9bd13 | 3475 | /* Resuming binding levels is meant only for namespaces, |
3476 | and those cannot nest into classes. */ | |
3477 | gcc_assert (!class_binding_level); | |
3478 | /* Also, resuming a non-directly nested namespace is a no-no. */ | |
3479 | gcc_assert (b->level_chain == current_binding_level); | |
3480 | current_binding_level = b; | |
3481 | if (ENABLE_SCOPE_CHECKING) | |
3482 | { | |
3483 | b->binding_depth = binding_depth; | |
3484 | indent (binding_depth); | |
3485 | cp_binding_level_debug (b, LOCATION_LINE (input_location), "resume"); | |
3486 | binding_depth++; | |
3487 | } | |
6198e8f6 | 3488 | } |
3489 | ||
4fd9bd13 | 3490 | /* Return the innermost binding level that is not for a class scope. */ |
894d126e | 3491 | |
4fd9bd13 | 3492 | static cp_binding_level * |
3493 | innermost_nonclass_level (void) | |
894d126e | 3494 | { |
4fd9bd13 | 3495 | cp_binding_level *b; |
894d126e | 3496 | |
4fd9bd13 | 3497 | b = current_binding_level; |
3498 | while (b->kind == sk_class) | |
3499 | b = b->level_chain; | |
894d126e | 3500 | |
4fd9bd13 | 3501 | return b; |
894d126e | 3502 | } |
836495aa | 3503 | |
4fd9bd13 | 3504 | /* We're defining an object of type TYPE. If it needs a cleanup, but |
3505 | we're not allowed to add any more objects with cleanups to the current | |
3506 | scope, create a new binding level. */ | |
9a49d46b | 3507 | |
4fd9bd13 | 3508 | void |
3509 | maybe_push_cleanup_level (tree type) | |
9a49d46b | 3510 | { |
4fd9bd13 | 3511 | if (type != error_mark_node |
3512 | && TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type) | |
3513 | && current_binding_level->more_cleanups_ok == 0) | |
9a49d46b | 3514 | { |
4fd9bd13 | 3515 | begin_scope (sk_cleanup, NULL); |
3516 | current_binding_level->statement_list = push_stmt_list (); | |
3517 | } | |
3518 | } | |
9a49d46b | 3519 | |
4fd9bd13 | 3520 | /* Return true if we are in the global binding level. */ |
9a49d46b | 3521 | |
4fd9bd13 | 3522 | bool |
3523 | global_bindings_p (void) | |
3524 | { | |
3525 | return global_scope_p (current_binding_level); | |
3526 | } | |
9a49d46b | 3527 | |
4fd9bd13 | 3528 | /* True if we are currently in a toplevel binding level. This |
3529 | means either the global binding level or a namespace in a toplevel | |
3530 | binding level. Since there are no non-toplevel namespace levels, | |
3531 | this really means any namespace or template parameter level. We | |
3532 | also include a class whose context is toplevel. */ | |
f213de01 | 3533 | |
4fd9bd13 | 3534 | bool |
3535 | toplevel_bindings_p (void) | |
3536 | { | |
3537 | cp_binding_level *b = innermost_nonclass_level (); | |
9a49d46b | 3538 | |
4fd9bd13 | 3539 | return b->kind == sk_namespace || b->kind == sk_template_parms; |
3540 | } | |
9a49d46b | 3541 | |
4fd9bd13 | 3542 | /* True if this is a namespace scope, or if we are defining a class |
3543 | which is itself at namespace scope, or whose enclosing class is | |
3544 | such a class, etc. */ | |
9a49d46b | 3545 | |
4fd9bd13 | 3546 | bool |
3547 | namespace_bindings_p (void) | |
3548 | { | |
3549 | cp_binding_level *b = innermost_nonclass_level (); | |
9a49d46b | 3550 | |
4fd9bd13 | 3551 | return b->kind == sk_namespace; |
3552 | } | |
9a49d46b | 3553 | |
4fd9bd13 | 3554 | /* True if the innermost non-class scope is a block scope. */ |
9a49d46b | 3555 | |
4fd9bd13 | 3556 | bool |
3557 | local_bindings_p (void) | |
3558 | { | |
3559 | cp_binding_level *b = innermost_nonclass_level (); | |
3560 | return b->kind < sk_function_parms || b->kind == sk_omp; | |
3561 | } | |
9a49d46b | 3562 | |
4fd9bd13 | 3563 | /* True if the current level needs to have a BLOCK made. */ |
9a49d46b | 3564 | |
4fd9bd13 | 3565 | bool |
3566 | kept_level_p (void) | |
3567 | { | |
3568 | return (current_binding_level->blocks != NULL_TREE | |
3569 | || current_binding_level->keep | |
3570 | || current_binding_level->kind == sk_cleanup | |
3571 | || current_binding_level->names != NULL_TREE | |
3572 | || current_binding_level->using_directives); | |
6198e8f6 | 3573 | } |
3574 | ||
4fd9bd13 | 3575 | /* Returns the kind of the innermost scope. */ |
6198e8f6 | 3576 | |
4fd9bd13 | 3577 | scope_kind |
3578 | innermost_scope_kind (void) | |
6198e8f6 | 3579 | { |
4fd9bd13 | 3580 | return current_binding_level->kind; |
9a49d46b | 3581 | } |
3582 | ||
4fd9bd13 | 3583 | /* Returns true if this scope was created to store template parameters. */ |
cc9a4194 | 3584 | |
4fd9bd13 | 3585 | bool |
3586 | template_parm_scope_p (void) | |
cc9a4194 | 3587 | { |
4fd9bd13 | 3588 | return innermost_scope_kind () == sk_template_parms; |
3589 | } | |
2b217005 | 3590 | |
4fd9bd13 | 3591 | /* If KEEP is true, make a BLOCK node for the next binding level, |
3592 | unconditionally. Otherwise, use the normal logic to decide whether | |
3593 | or not to create a BLOCK. */ | |
cc9a4194 | 3594 | |
4fd9bd13 | 3595 | void |
3596 | keep_next_level (bool keep) | |
3597 | { | |
3598 | keep_next_level_flag = keep; | |
3599 | } | |
cc9a4194 | 3600 | |
6c2a7aff | 3601 | /* Return the list of declarations of the current local scope. */ |
cc9a4194 | 3602 | |
4fd9bd13 | 3603 | tree |
6c2a7aff | 3604 | get_local_decls (void) |
4fd9bd13 | 3605 | { |
6c2a7aff | 3606 | gcc_assert (current_binding_level->kind != sk_namespace |
3607 | && current_binding_level->kind != sk_class); | |
4fd9bd13 | 3608 | return current_binding_level->names; |
3609 | } | |
cc9a4194 | 3610 | |
4fd9bd13 | 3611 | /* Return how many function prototypes we are currently nested inside. */ |
cc9a4194 | 3612 | |
4fd9bd13 | 3613 | int |
3614 | function_parm_depth (void) | |
3615 | { | |
3616 | int level = 0; | |
3617 | cp_binding_level *b; | |
245d3727 | 3618 | |
4fd9bd13 | 3619 | for (b = current_binding_level; |
3620 | b->kind == sk_function_parms; | |
3621 | b = b->level_chain) | |
3622 | ++level; | |
3623 | ||
3624 | return level; | |
cc9a4194 | 3625 | } |
3626 | ||
4fd9bd13 | 3627 | /* For debugging. */ |
3628 | static int no_print_functions = 0; | |
3629 | static int no_print_builtins = 0; | |
cc9a4194 | 3630 | |
3631 | static void | |
4fd9bd13 | 3632 | print_binding_level (cp_binding_level* lvl) |
cc9a4194 | 3633 | { |
4fd9bd13 | 3634 | tree t; |
3635 | int i = 0, len; | |
3636 | fprintf (stderr, " blocks=%p", (void *) lvl->blocks); | |
3637 | if (lvl->more_cleanups_ok) | |
3638 | fprintf (stderr, " more-cleanups-ok"); | |
3639 | if (lvl->have_cleanups) | |
3640 | fprintf (stderr, " have-cleanups"); | |
3641 | fprintf (stderr, "\n"); | |
3642 | if (lvl->names) | |
3643 | { | |
3644 | fprintf (stderr, " names:\t"); | |
3645 | /* We can probably fit 3 names to a line? */ | |
3646 | for (t = lvl->names; t; t = TREE_CHAIN (t)) | |
3647 | { | |
3648 | if (no_print_functions && (TREE_CODE (t) == FUNCTION_DECL)) | |
3649 | continue; | |
3650 | if (no_print_builtins | |
3651 | && (TREE_CODE (t) == TYPE_DECL) | |
3652 | && DECL_IS_BUILTIN (t)) | |
3653 | continue; | |
cc9a4194 | 3654 | |
4fd9bd13 | 3655 | /* Function decls tend to have longer names. */ |
3656 | if (TREE_CODE (t) == FUNCTION_DECL) | |
3657 | len = 3; | |
3658 | else | |
3659 | len = 2; | |
3660 | i += len; | |
3661 | if (i > 6) | |
3662 | { | |
3663 | fprintf (stderr, "\n\t"); | |
3664 | i = len; | |
3665 | } | |
3666 | print_node_brief (stderr, "", t, 0); | |
3667 | if (t == error_mark_node) | |
3668 | break; | |
3669 | } | |
3670 | if (i) | |
3671 | fprintf (stderr, "\n"); | |
3672 | } | |
3673 | if (vec_safe_length (lvl->class_shadowed)) | |
cc9a4194 | 3674 | { |
4fd9bd13 | 3675 | size_t i; |
3676 | cp_class_binding *b; | |
3677 | fprintf (stderr, " class-shadowed:"); | |
3678 | FOR_EACH_VEC_ELT (*lvl->class_shadowed, i, b) | |
3679 | fprintf (stderr, " %s ", IDENTIFIER_POINTER (b->identifier)); | |
3680 | fprintf (stderr, "\n"); | |
cc9a4194 | 3681 | } |
4fd9bd13 | 3682 | if (lvl->type_shadowed) |
69525376 | 3683 | { |
4fd9bd13 | 3684 | fprintf (stderr, " type-shadowed:"); |
3685 | for (t = lvl->type_shadowed; t; t = TREE_CHAIN (t)) | |
3686 | { | |
3687 | fprintf (stderr, " %s ", IDENTIFIER_POINTER (TREE_PURPOSE (t))); | |
3688 | } | |
3689 | fprintf (stderr, "\n"); | |
69525376 | 3690 | } |
4fd9bd13 | 3691 | } |
69525376 | 3692 | |
4fd9bd13 | 3693 | DEBUG_FUNCTION void |
3694 | debug (cp_binding_level &ref) | |
3695 | { | |
3696 | print_binding_level (&ref); | |
3697 | } | |
3698 | ||
3699 | DEBUG_FUNCTION void | |
3700 | debug (cp_binding_level *ptr) | |
3701 | { | |
3702 | if (ptr) | |
3703 | debug (*ptr); | |
3704 | else | |
3705 | fprintf (stderr, "<nil>\n"); | |
3706 | } | |
3707 | ||
3708 | ||
3709 | void | |
3710 | print_other_binding_stack (cp_binding_level *stack) | |
3711 | { | |
3712 | cp_binding_level *level; | |
3713 | for (level = stack; !global_scope_p (level); level = level->level_chain) | |
69525376 | 3714 | { |
4fd9bd13 | 3715 | fprintf (stderr, "binding level %p\n", (void *) level); |
3716 | print_binding_level (level); | |
69525376 | 3717 | } |
4fd9bd13 | 3718 | } |
69525376 | 3719 | |
4fd9bd13 | 3720 | void |
3721 | print_binding_stack (void) | |
3722 | { | |
3723 | cp_binding_level *b; | |
3724 | fprintf (stderr, "current_binding_level=%p\n" | |
3725 | "class_binding_level=%p\n" | |
3726 | "NAMESPACE_LEVEL (global_namespace)=%p\n", | |
3727 | (void *) current_binding_level, (void *) class_binding_level, | |
3728 | (void *) NAMESPACE_LEVEL (global_namespace)); | |
3729 | if (class_binding_level) | |
cc9a4194 | 3730 | { |
4fd9bd13 | 3731 | for (b = class_binding_level; b; b = b->level_chain) |
3732 | if (b == current_binding_level) | |
3733 | break; | |
3734 | if (b) | |
3735 | b = class_binding_level; | |
3736 | else | |
3737 | b = current_binding_level; | |
3738 | } | |
3739 | else | |
3740 | b = current_binding_level; | |
3741 | print_other_binding_stack (b); | |
3742 | fprintf (stderr, "global:\n"); | |
3743 | print_binding_level (NAMESPACE_LEVEL (global_namespace)); | |
3744 | } | |
3745 | \f | |
3746 | /* Return the type associated with ID. */ | |
cc9a4194 | 3747 | |
4fd9bd13 | 3748 | static tree |
3749 | identifier_type_value_1 (tree id) | |
3750 | { | |
3751 | /* There is no type with that name, anywhere. */ | |
3752 | if (REAL_IDENTIFIER_TYPE_VALUE (id) == NULL_TREE) | |
3753 | return NULL_TREE; | |
3754 | /* This is not the type marker, but the real thing. */ | |
3755 | if (REAL_IDENTIFIER_TYPE_VALUE (id) != global_type_node) | |
3756 | return REAL_IDENTIFIER_TYPE_VALUE (id); | |
3757 | /* Have to search for it. It must be on the global level, now. | |
3758 | Ask lookup_name not to return non-types. */ | |
3759 | id = lookup_name_real (id, 2, 1, /*block_p=*/true, 0, 0); | |
3760 | if (id) | |
3761 | return TREE_TYPE (id); | |
3762 | return NULL_TREE; | |
3763 | } | |
69525376 | 3764 | |
4fd9bd13 | 3765 | /* Wrapper for identifier_type_value_1. */ |
58fd2d6f | 3766 | |
4fd9bd13 | 3767 | tree |
3768 | identifier_type_value (tree id) | |
3769 | { | |
3770 | tree ret; | |
3771 | timevar_start (TV_NAME_LOOKUP); | |
3772 | ret = identifier_type_value_1 (id); | |
3773 | timevar_stop (TV_NAME_LOOKUP); | |
3774 | return ret; | |
3775 | } | |
69525376 | 3776 | |
d612858d | 3777 | |
4fd9bd13 | 3778 | /* Return the IDENTIFIER_GLOBAL_VALUE of T, for use in common code, since |
3779 | the definition of IDENTIFIER_GLOBAL_VALUE is different for C and C++. */ | |
cc9a4194 | 3780 | |
4fd9bd13 | 3781 | tree |
3782 | identifier_global_value (tree t) | |
3783 | { | |
3784 | return IDENTIFIER_GLOBAL_VALUE (t); | |
3785 | } | |
69525376 | 3786 | |
4fd9bd13 | 3787 | /* Push a definition of struct, union or enum tag named ID. into |
3788 | binding_level B. DECL is a TYPE_DECL for the type. We assume that | |
3789 | the tag ID is not already defined. */ | |
58fd2d6f | 3790 | |
4fd9bd13 | 3791 | static void |
3792 | set_identifier_type_value_with_scope (tree id, tree decl, cp_binding_level *b) | |
3793 | { | |
3794 | tree type; | |
cc9a4194 | 3795 | |
4fd9bd13 | 3796 | if (b->kind != sk_namespace) |
cc9a4194 | 3797 | { |
4fd9bd13 | 3798 | /* Shadow the marker, not the real thing, so that the marker |
3799 | gets restored later. */ | |
3800 | tree old_type_value = REAL_IDENTIFIER_TYPE_VALUE (id); | |
3801 | b->type_shadowed | |
3802 | = tree_cons (id, old_type_value, b->type_shadowed); | |
3803 | type = decl ? TREE_TYPE (decl) : NULL_TREE; | |
3804 | TREE_TYPE (b->type_shadowed) = type; | |
f8be65bb | 3805 | } |
3806 | else | |
3807 | { | |
17d66324 | 3808 | tree *slot = find_namespace_slot (current_namespace, id, true); |
3809 | gcc_assert (decl); | |
3810 | update_binding (b, NULL, slot, MAYBE_STAT_DECL (*slot), decl, false); | |
69525376 | 3811 | |
4fd9bd13 | 3812 | /* Store marker instead of real type. */ |
3813 | type = global_type_node; | |
3814 | } | |
3815 | SET_IDENTIFIER_TYPE_VALUE (id, type); | |
cc9a4194 | 3816 | } |
3817 | ||
4fd9bd13 | 3818 | /* As set_identifier_type_value_with_scope, but using |
3819 | current_binding_level. */ | |
cc9a4194 | 3820 | |
3821 | void | |
4fd9bd13 | 3822 | set_identifier_type_value (tree id, tree decl) |
cc9a4194 | 3823 | { |
4fd9bd13 | 3824 | set_identifier_type_value_with_scope (id, decl, current_binding_level); |
3825 | } | |
cc9a4194 | 3826 | |
4fd9bd13 | 3827 | /* Return the name for the constructor (or destructor) for the |
3461db54 | 3828 | specified class. */ |
cc9a4194 | 3829 | |
4fd9bd13 | 3830 | tree |
3831 | constructor_name (tree type) | |
3832 | { | |
6c26e5e5 | 3833 | tree decl = TYPE_NAME (TYPE_MAIN_VARIANT (type)); |
3834 | ||
3835 | return decl ? DECL_NAME (decl) : NULL_TREE; | |
4fd9bd13 | 3836 | } |
cc9a4194 | 3837 | |
4fd9bd13 | 3838 | /* Returns TRUE if NAME is the name for the constructor for TYPE, |
3839 | which must be a class type. */ | |
cc9a4194 | 3840 | |
4fd9bd13 | 3841 | bool |
3842 | constructor_name_p (tree name, tree type) | |
3843 | { | |
4fd9bd13 | 3844 | gcc_assert (MAYBE_CLASS_TYPE_P (type)); |
3845 | ||
4fd9bd13 | 3846 | /* These don't have names. */ |
3847 | if (TREE_CODE (type) == DECLTYPE_TYPE | |
3848 | || TREE_CODE (type) == TYPEOF_TYPE) | |
3849 | return false; | |
3850 | ||
6c26e5e5 | 3851 | if (name && name == constructor_name (type)) |
4fd9bd13 | 3852 | return true; |
3461db54 | 3853 | |
4fd9bd13 | 3854 | return false; |
cc9a4194 | 3855 | } |
3856 | ||
4fd9bd13 | 3857 | /* Counter used to create anonymous type names. */ |
cc9a4194 | 3858 | |
4fd9bd13 | 3859 | static GTY(()) int anon_cnt; |
3860 | ||
3861 | /* Return an IDENTIFIER which can be used as a name for | |
3862 | unnamed structs and unions. */ | |
3863 | ||
3864 | tree | |
3865 | make_anon_name (void) | |
cc9a4194 | 3866 | { |
4fd9bd13 | 3867 | char buf[32]; |
3868 | ||
3869 | sprintf (buf, anon_aggrname_format (), anon_cnt++); | |
3870 | return get_identifier (buf); | |
3871 | } | |
3872 | ||
3873 | /* This code is practically identical to that for creating | |
3874 | anonymous names, but is just used for lambdas instead. This isn't really | |
3875 | necessary, but it's convenient to avoid treating lambdas like other | |
3876 | unnamed types. */ | |
3877 | ||
3878 | static GTY(()) int lambda_cnt = 0; | |
3879 | ||
3880 | tree | |
3881 | make_lambda_name (void) | |
3882 | { | |
3883 | char buf[32]; | |
3884 | ||
3885 | sprintf (buf, LAMBDANAME_FORMAT, lambda_cnt++); | |
3886 | return get_identifier (buf); | |
3887 | } | |
9031d10b | 3888 | |
4fd9bd13 | 3889 | /* Insert another USING_DECL into the current binding level, returning |
3890 | this declaration. If this is a redeclaration, do nothing, and | |
3891 | return NULL_TREE if this not in namespace scope (in namespace | |
3892 | scope, a using decl might extend any previous bindings). */ | |
352baa70 | 3893 | |
4fd9bd13 | 3894 | static tree |
3895 | push_using_decl_1 (tree scope, tree name) | |
352baa70 | 3896 | { |
4fd9bd13 | 3897 | tree decl; |
352baa70 | 3898 | |
4fd9bd13 | 3899 | gcc_assert (TREE_CODE (scope) == NAMESPACE_DECL); |
3900 | gcc_assert (identifier_p (name)); | |
3901 | for (decl = current_binding_level->usings; decl; decl = DECL_CHAIN (decl)) | |
3902 | if (USING_DECL_SCOPE (decl) == scope && DECL_NAME (decl) == name) | |
3903 | break; | |
3904 | if (decl) | |
3905 | return namespace_bindings_p () ? decl : NULL_TREE; | |
3906 | decl = build_lang_decl (USING_DECL, name, NULL_TREE); | |
3907 | USING_DECL_SCOPE (decl) = scope; | |
3908 | DECL_CHAIN (decl) = current_binding_level->usings; | |
3909 | current_binding_level->usings = decl; | |
3910 | return decl; | |
352baa70 | 3911 | } |
3912 | ||
4fd9bd13 | 3913 | /* Wrapper for push_using_decl_1. */ |
352baa70 | 3914 | |
4fd9bd13 | 3915 | static tree |
3916 | push_using_decl (tree scope, tree name) | |
352baa70 | 3917 | { |
4fd9bd13 | 3918 | tree ret; |
3919 | timevar_start (TV_NAME_LOOKUP); | |
3920 | ret = push_using_decl_1 (scope, name); | |
3921 | timevar_stop (TV_NAME_LOOKUP); | |
3922 | return ret; | |
3923 | } | |
352baa70 | 3924 | |
4fd9bd13 | 3925 | /* Same as pushdecl, but define X in binding-level LEVEL. We rely on the |
3926 | caller to set DECL_CONTEXT properly. | |
352baa70 | 3927 | |
4fd9bd13 | 3928 | Note that this must only be used when X will be the new innermost |
3929 | binding for its name, as we tack it onto the front of IDENTIFIER_BINDING | |
3930 | without checking to see if the current IDENTIFIER_BINDING comes from a | |
3931 | closer binding level than LEVEL. */ | |
352baa70 | 3932 | |
4fd9bd13 | 3933 | static tree |
d6cc2ec2 | 3934 | do_pushdecl_with_scope (tree x, cp_binding_level *level, bool is_friend) |
4fd9bd13 | 3935 | { |
3936 | cp_binding_level *b; | |
3937 | tree function_decl = current_function_decl; | |
352baa70 | 3938 | |
4fd9bd13 | 3939 | current_function_decl = NULL_TREE; |
3940 | if (level->kind == sk_class) | |
3941 | { | |
3942 | b = class_binding_level; | |
3943 | class_binding_level = level; | |
3944 | pushdecl_class_level (x); | |
3945 | class_binding_level = b; | |
3946 | } | |
3947 | else | |
3948 | { | |
3949 | b = current_binding_level; | |
3950 | current_binding_level = level; | |
2e33aaef | 3951 | x = pushdecl (x, is_friend); |
4fd9bd13 | 3952 | current_binding_level = b; |
352baa70 | 3953 | } |
4fd9bd13 | 3954 | current_function_decl = function_decl; |
3955 | return x; | |
352baa70 | 3956 | } |
03d9ebc0 | 3957 | |
adf347c7 | 3958 | /* Inject X into the local scope just before the function parms. */ |
836495aa | 3959 | |
4fd9bd13 | 3960 | tree |
adf347c7 | 3961 | pushdecl_outermost_localscope (tree x) |
836495aa | 3962 | { |
0b6fbbbb | 3963 | cp_binding_level *b = NULL; |
4fd9bd13 | 3964 | bool subtime = timevar_cond_start (TV_NAME_LOOKUP); |
adf347c7 | 3965 | |
0b6fbbbb | 3966 | /* Find the scope just inside the function parms. */ |
3967 | for (cp_binding_level *n = current_binding_level; | |
3968 | n->kind != sk_function_parms; n = b->level_chain) | |
3969 | b = n; | |
3970 | ||
d6cc2ec2 | 3971 | tree ret = b ? do_pushdecl_with_scope (x, b, false) : error_mark_node; |
4fd9bd13 | 3972 | timevar_cond_stop (TV_NAME_LOOKUP, subtime); |
0b6fbbbb | 3973 | |
4fd9bd13 | 3974 | return ret; |
836495aa | 3975 | } |
3976 | ||
4fd9bd13 | 3977 | /* Check a non-member using-declaration. Return the name and scope |
3978 | being used, and the USING_DECL, or NULL_TREE on failure. */ | |
49babdb3 | 3979 | |
4fd9bd13 | 3980 | static tree |
3981 | validate_nonmember_using_decl (tree decl, tree scope, tree name) | |
3982 | { | |
3983 | /* [namespace.udecl] | |
3984 | A using-declaration for a class member shall be a | |
3985 | member-declaration. */ | |
3986 | if (TYPE_P (scope)) | |
d09ae6d5 | 3987 | { |
4fd9bd13 | 3988 | error ("%qT is not a namespace or unscoped enum", scope); |
3989 | return NULL_TREE; | |
49babdb3 | 3990 | } |
4fd9bd13 | 3991 | else if (scope == error_mark_node) |
3992 | return NULL_TREE; | |
49babdb3 | 3993 | |
4fd9bd13 | 3994 | if (TREE_CODE (decl) == TEMPLATE_ID_EXPR) |
d09ae6d5 | 3995 | { |
4fd9bd13 | 3996 | /* 7.3.3/5 |
3997 | A using-declaration shall not name a template-id. */ | |
3998 | error ("a using-declaration cannot specify a template-id. " | |
3999 | "Try %<using %D%>", name); | |
4000 | return NULL_TREE; | |
d09ae6d5 | 4001 | } |
4002 | ||
4fd9bd13 | 4003 | if (TREE_CODE (decl) == NAMESPACE_DECL) |
836495aa | 4004 | { |
4fd9bd13 | 4005 | error ("namespace %qD not allowed in using-declaration", decl); |
4006 | return NULL_TREE; | |
836495aa | 4007 | } |
4008 | ||
4fd9bd13 | 4009 | if (TREE_CODE (decl) == SCOPE_REF) |
d09ae6d5 | 4010 | { |
4fd9bd13 | 4011 | /* It's a nested name with template parameter dependent scope. |
4012 | This can only be using-declaration for class member. */ | |
4013 | error ("%qT is not a namespace", TREE_OPERAND (decl, 0)); | |
4014 | return NULL_TREE; | |
d09ae6d5 | 4015 | } |
836495aa | 4016 | |
eb9d4ee4 | 4017 | decl = OVL_FIRST (decl); |
6198e8f6 | 4018 | |
4fd9bd13 | 4019 | /* Make a USING_DECL. */ |
4020 | tree using_decl = push_using_decl (scope, name); | |
6198e8f6 | 4021 | |
4fd9bd13 | 4022 | if (using_decl == NULL_TREE |
4023 | && at_function_scope_p () | |
4024 | && VAR_P (decl)) | |
4025 | /* C++11 7.3.3/10. */ | |
4026 | error ("%qD is already declared in this scope", name); | |
4027 | ||
4028 | return using_decl; | |
836495aa | 4029 | } |
4030 | ||
eb9d4ee4 | 4031 | /* Process a local-scope or namespace-scope using declaration. SCOPE |
4032 | is the nominated scope to search for NAME. VALUE_P and TYPE_P | |
4033 | point to the binding for NAME in the current scope and are | |
4034 | updated. */ | |
2ded3667 | 4035 | |
4fd9bd13 | 4036 | static void |
eb9d4ee4 | 4037 | do_nonmember_using_decl (tree scope, tree name, tree *value_p, tree *type_p) |
cc9a4194 | 4038 | { |
421bfc0f | 4039 | name_lookup lookup (name, 0); |
9031d10b | 4040 | |
421bfc0f | 4041 | if (!qualified_namespace_lookup (scope, &lookup)) |
cc9a4194 | 4042 | { |
4fd9bd13 | 4043 | error ("%qD not declared", name); |
4044 | return; | |
cc9a4194 | 4045 | } |
eb9d4ee4 | 4046 | else if (TREE_CODE (lookup.value) == TREE_LIST) |
4047 | { | |
4048 | error ("reference to %qD is ambiguous", name); | |
4049 | print_candidates (lookup.value); | |
4050 | lookup.value = NULL_TREE; | |
4051 | } | |
4052 | ||
4053 | if (lookup.type && TREE_CODE (lookup.type) == TREE_LIST) | |
4054 | { | |
4055 | error ("reference to %qD is ambiguous", name); | |
4056 | print_candidates (lookup.type); | |
4057 | lookup.type = NULL_TREE; | |
4058 | } | |
4059 | ||
4060 | tree value = *value_p; | |
4061 | tree type = *type_p; | |
094fb0d8 | 4062 | |
4fd9bd13 | 4063 | /* Shift the old and new bindings around so we're comparing class and |
4064 | enumeration names to each other. */ | |
eb9d4ee4 | 4065 | if (value && DECL_IMPLICIT_TYPEDEF_P (value)) |
cc9a4194 | 4066 | { |
eb9d4ee4 | 4067 | type = value; |
4068 | value = NULL_TREE; | |
094fb0d8 | 4069 | } |
4fd9bd13 | 4070 | |
eb9d4ee4 | 4071 | if (lookup.value && DECL_IMPLICIT_TYPEDEF_P (lookup.value)) |
1710de71 | 4072 | { |
eb9d4ee4 | 4073 | lookup.type = lookup.value; |
4074 | lookup.value = NULL_TREE; | |
1710de71 | 4075 | } |
4fd9bd13 | 4076 | |
eb9d4ee4 | 4077 | if (lookup.value && lookup.value != value) |
094fb0d8 | 4078 | { |
4fd9bd13 | 4079 | /* Check for using functions. */ |
eb9d4ee4 | 4080 | if (OVL_P (lookup.value) && (!value || OVL_P (value))) |
4fd9bd13 | 4081 | { |
eb9d4ee4 | 4082 | for (lkp_iterator usings (lookup.value); usings; ++usings) |
4fd9bd13 | 4083 | { |
eb9d4ee4 | 4084 | tree new_fn = *usings; |
bbb1e488 | 4085 | |
4fd9bd13 | 4086 | /* [namespace.udecl] |
9031d10b | 4087 | |
4fd9bd13 | 4088 | If a function declaration in namespace scope or block |
4089 | scope has the same name and the same parameter types as a | |
4090 | function introduced by a using declaration the program is | |
4091 | ill-formed. */ | |
eb9d4ee4 | 4092 | bool found = false; |
4093 | for (ovl_iterator old (value); !found && old; ++old) | |
4fd9bd13 | 4094 | { |
eb9d4ee4 | 4095 | tree old_fn = *old; |
074ab442 | 4096 | |
4fd9bd13 | 4097 | if (new_fn == old_fn) |
eb9d4ee4 | 4098 | /* The function already exists in the current |
4099 | namespace. */ | |
4100 | found = true; | |
4101 | else if (old.using_p ()) | |
4102 | continue; /* This is a using decl. */ | |
788172b2 | 4103 | else if (old.hidden_p () && !DECL_HIDDEN_FRIEND_P (old_fn)) |
eb9d4ee4 | 4104 | continue; /* This is an anticipated builtin. */ |
4105 | else if (!matching_fn_p (new_fn, old_fn)) | |
4106 | continue; /* Parameters do not match. */ | |
4107 | else if (decls_match (new_fn, old_fn)) | |
4108 | found = true; | |
4109 | else | |
4fd9bd13 | 4110 | { |
eb9d4ee4 | 4111 | diagnose_name_conflict (new_fn, old_fn); |
4112 | found = true; | |
4fd9bd13 | 4113 | } |
4114 | } | |
9e92dfe5 | 4115 | |
eb9d4ee4 | 4116 | if (!found) |
4117 | /* Unlike the overload case we don't drop anticipated | |
4118 | builtins here. They don't cause a problem, and | |
4119 | we'd like to match them with a future | |
4120 | declaration. */ | |
4121 | value = ovl_insert (new_fn, value, true); | |
4a132a96 | 4122 | } |
094fb0d8 | 4123 | } |
eb9d4ee4 | 4124 | else if (value |
4125 | /* Ignore anticipated builtins. */ | |
788172b2 | 4126 | && !anticipated_builtin_p (value) |
eb9d4ee4 | 4127 | && !decls_match (lookup.value, value)) |
4128 | diagnose_name_conflict (lookup.value, value); | |
4fd9bd13 | 4129 | else |
eb9d4ee4 | 4130 | value = lookup.value; |
4fd9bd13 | 4131 | } |
4132 | ||
eb9d4ee4 | 4133 | if (lookup.type && lookup.type != type) |
4fd9bd13 | 4134 | { |
eb9d4ee4 | 4135 | if (type && !decls_match (lookup.type, type)) |
4136 | diagnose_name_conflict (lookup.type, type); | |
4fd9bd13 | 4137 | else |
eb9d4ee4 | 4138 | type = lookup.type; |
4fd9bd13 | 4139 | } |
eb9d4ee4 | 4140 | |
4141 | /* If bind->value is empty, shift any class or enumeration name back. */ | |
4142 | if (!value) | |
4fd9bd13 | 4143 | { |
eb9d4ee4 | 4144 | value = type; |
4145 | type = NULL_TREE; | |
9e92dfe5 | 4146 | } |
094fb0d8 | 4147 | |
eb9d4ee4 | 4148 | *value_p = value; |
4149 | *type_p = type; | |
cc9a4194 | 4150 | } |
4151 | ||
ccb7f6c9 | 4152 | /* Returns true if ANCESTOR encloses DESCENDANT, including matching. |
4153 | Both are namespaces. */ | |
4154 | ||
4155 | bool | |
4156 | is_nested_namespace (tree ancestor, tree descendant, bool inline_only) | |
4157 | { | |
4158 | int depth = SCOPE_DEPTH (ancestor); | |
4159 | ||
4160 | if (!depth && !inline_only) | |
4161 | /* The global namespace encloses everything. */ | |
4162 | return true; | |
4163 | ||
4164 | while (SCOPE_DEPTH (descendant) > depth | |
4165 | && (!inline_only || DECL_NAMESPACE_INLINE_P (descendant))) | |
4166 | descendant = CP_DECL_CONTEXT (descendant); | |
4167 | ||
4168 | return ancestor == descendant; | |
4169 | } | |
4170 | ||
4fd9bd13 | 4171 | /* Returns true if ROOT (a namespace, class, or function) encloses |
4172 | CHILD. CHILD may be either a class type or a namespace. */ | |
6198e8f6 | 4173 | |
4fd9bd13 | 4174 | bool |
4175 | is_ancestor (tree root, tree child) | |
836495aa | 4176 | { |
4fd9bd13 | 4177 | gcc_assert ((TREE_CODE (root) == NAMESPACE_DECL |
4178 | || TREE_CODE (root) == FUNCTION_DECL | |
4179 | || CLASS_TYPE_P (root))); | |
4180 | gcc_assert ((TREE_CODE (child) == NAMESPACE_DECL | |
4181 | || CLASS_TYPE_P (child))); | |
836495aa | 4182 | |
4fd9bd13 | 4183 | /* The global namespace encloses everything. */ |
4184 | if (root == global_namespace) | |
4185 | return true; | |
836495aa | 4186 | |
ccb7f6c9 | 4187 | /* Search until we reach namespace scope. */ |
4188 | while (TREE_CODE (child) != NAMESPACE_DECL) | |
4fd9bd13 | 4189 | { |
4fd9bd13 | 4190 | /* If we've reached the ROOT, it encloses CHILD. */ |
4191 | if (root == child) | |
4192 | return true; | |
4193 | /* Go out one level. */ | |
4194 | if (TYPE_P (child)) | |
4195 | child = TYPE_NAME (child); | |
ccb7f6c9 | 4196 | child = CP_DECL_CONTEXT (child); |
4fd9bd13 | 4197 | } |
ccb7f6c9 | 4198 | |
4199 | if (TREE_CODE (root) == NAMESPACE_DECL) | |
4200 | return is_nested_namespace (root, child); | |
4201 | ||
4202 | return false; | |
6198e8f6 | 4203 | } |
4204 | ||
4fd9bd13 | 4205 | /* Enter the class or namespace scope indicated by T suitable for name |
4206 | lookup. T can be arbitrary scope, not necessary nested inside the | |
4207 | current scope. Returns a non-null scope to pop iff pop_scope | |
4208 | should be called later to exit this scope. */ | |
d36ac936 | 4209 | |
4fd9bd13 | 4210 | tree |
4211 | push_scope (tree t) | |
d36ac936 | 4212 | { |
4fd9bd13 | 4213 | if (TREE_CODE (t) == NAMESPACE_DECL) |
4214 | push_decl_namespace (t); | |
4215 | else if (CLASS_TYPE_P (t)) | |
4216 | { | |
4217 | if (!at_class_scope_p () | |
4218 | || !same_type_p (current_class_type, t)) | |
4219 | push_nested_class (t); | |
4220 | else | |
4221 | /* T is the same as the current scope. There is therefore no | |
4222 | need to re-enter the scope. Since we are not actually | |
4223 | pushing a new scope, our caller should not call | |
4224 | pop_scope. */ | |
4225 | t = NULL_TREE; | |
4226 | } | |
d36ac936 | 4227 | |
4fd9bd13 | 4228 | return t; |
6198e8f6 | 4229 | } |
4230 | ||
4fd9bd13 | 4231 | /* Leave scope pushed by push_scope. */ |
6198e8f6 | 4232 | |
4233 | void | |
4fd9bd13 | 4234 | pop_scope (tree t) |
6198e8f6 | 4235 | { |
4fd9bd13 | 4236 | if (t == NULL_TREE) |
4237 | return; | |
4238 | if (TREE_CODE (t) == NAMESPACE_DECL) | |
4239 | pop_decl_namespace (); | |
4240 | else if CLASS_TYPE_P (t) | |
4241 | pop_nested_class (); | |
d36ac936 | 4242 | } |
4243 | ||
4fd9bd13 | 4244 | /* Subroutine of push_inner_scope. */ |
cc9a4194 | 4245 | |
4fd9bd13 | 4246 | static void |
4247 | push_inner_scope_r (tree outer, tree inner) | |
cc9a4194 | 4248 | { |
4fd9bd13 | 4249 | tree prev; |
ab6bb714 | 4250 | |
4fd9bd13 | 4251 | if (outer == inner |
4252 | || (TREE_CODE (inner) != NAMESPACE_DECL && !CLASS_TYPE_P (inner))) | |
d9f07a8d | 4253 | return; |
4fd9bd13 | 4254 | |
4255 | prev = CP_DECL_CONTEXT (TREE_CODE (inner) == NAMESPACE_DECL ? inner : TYPE_NAME (inner)); | |
4256 | if (outer != prev) | |
4257 | push_inner_scope_r (outer, prev); | |
4258 | if (TREE_CODE (inner) == NAMESPACE_DECL) | |
ab6bb714 | 4259 | { |
4fd9bd13 | 4260 | cp_binding_level *save_template_parm = 0; |
4261 | /* Temporary take out template parameter scopes. They are saved | |
4262 | in reversed order in save_template_parm. */ | |
4263 | while (current_binding_level->kind == sk_template_parms) | |
71893b0a | 4264 | { |
4fd9bd13 | 4265 | cp_binding_level *b = current_binding_level; |
4266 | current_binding_level = b->level_chain; | |
4267 | b->level_chain = save_template_parm; | |
4268 | save_template_parm = b; | |
71893b0a | 4269 | } |
4fd9bd13 | 4270 | |
4271 | resume_scope (NAMESPACE_LEVEL (inner)); | |
4272 | current_namespace = inner; | |
4273 | ||
4274 | /* Restore template parameter scopes. */ | |
4275 | while (save_template_parm) | |
71893b0a | 4276 | { |
4fd9bd13 | 4277 | cp_binding_level *b = save_template_parm; |
4278 | save_template_parm = b->level_chain; | |
4279 | b->level_chain = current_binding_level; | |
4280 | current_binding_level = b; | |
71893b0a | 4281 | } |
ab6bb714 | 4282 | } |
4fd9bd13 | 4283 | else |
4284 | pushclass (inner); | |
9031d10b | 4285 | } |
cc9a4194 | 4286 | |
4fd9bd13 | 4287 | /* Enter the scope INNER from current scope. INNER must be a scope |
4288 | nested inside current scope. This works with both name lookup and | |
4289 | pushing name into scope. In case a template parameter scope is present, | |
4290 | namespace is pushed under the template parameter scope according to | |
4291 | name lookup rule in 14.6.1/6. | |
4292 | ||
4293 | Return the former current scope suitable for pop_inner_scope. */ | |
cc9a4194 | 4294 | |
305104fd | 4295 | tree |
4fd9bd13 | 4296 | push_inner_scope (tree inner) |
cc9a4194 | 4297 | { |
4fd9bd13 | 4298 | tree outer = current_scope (); |
4299 | if (!outer) | |
4300 | outer = current_namespace; | |
cc9a4194 | 4301 | |
4fd9bd13 | 4302 | push_inner_scope_r (outer, inner); |
4303 | return outer; | |
cc9a4194 | 4304 | } |
4305 | ||
4fd9bd13 | 4306 | /* Exit the current scope INNER back to scope OUTER. */ |
836495aa | 4307 | |
4fd9bd13 | 4308 | void |
4309 | pop_inner_scope (tree outer, tree inner) | |
799435d8 | 4310 | { |
4fd9bd13 | 4311 | if (outer == inner |
4312 | || (TREE_CODE (inner) != NAMESPACE_DECL && !CLASS_TYPE_P (inner))) | |
4313 | return; | |
799435d8 | 4314 | |
4fd9bd13 | 4315 | while (outer != inner) |
1fd77946 | 4316 | { |
4fd9bd13 | 4317 | if (TREE_CODE (inner) == NAMESPACE_DECL) |
1fd77946 | 4318 | { |
4fd9bd13 | 4319 | cp_binding_level *save_template_parm = 0; |
4320 | /* Temporary take out template parameter scopes. They are saved | |
4321 | in reversed order in save_template_parm. */ | |
4322 | while (current_binding_level->kind == sk_template_parms) | |
1fd77946 | 4323 | { |
4fd9bd13 | 4324 | cp_binding_level *b = current_binding_level; |
4325 | current_binding_level = b->level_chain; | |
4326 | b->level_chain = save_template_parm; | |
4327 | save_template_parm = b; | |
1fd77946 | 4328 | } |
4329 | ||
4fd9bd13 | 4330 | pop_namespace (); |
1fd77946 | 4331 | |
4fd9bd13 | 4332 | /* Restore template parameter scopes. */ |
4333 | while (save_template_parm) | |
527cb890 | 4334 | { |
4fd9bd13 | 4335 | cp_binding_level *b = save_template_parm; |
4336 | save_template_parm = b->level_chain; | |
4337 | b->level_chain = current_binding_level; | |
4338 | current_binding_level = b; | |
527cb890 | 4339 | } |
111eaa95 | 4340 | } |
1fd77946 | 4341 | else |
4fd9bd13 | 4342 | popclass (); |
4343 | ||
4344 | inner = CP_DECL_CONTEXT (TREE_CODE (inner) == NAMESPACE_DECL ? inner : TYPE_NAME (inner)); | |
1fd77946 | 4345 | } |
4fd9bd13 | 4346 | } |
4347 | \f | |
4348 | /* Do a pushlevel for class declarations. */ | |
1fd77946 | 4349 | |
4fd9bd13 | 4350 | void |
4351 | pushlevel_class (void) | |
4352 | { | |
4353 | class_binding_level = begin_scope (sk_class, current_class_type); | |
1fd77946 | 4354 | } |
799435d8 | 4355 | |
4fd9bd13 | 4356 | /* ...and a poplevel for class declarations. */ |
4357 | ||
4358 | void | |
4359 | poplevel_class (void) | |
836495aa | 4360 | { |
4fd9bd13 | 4361 | cp_binding_level *level = class_binding_level; |
4362 | cp_class_binding *cb; | |
4363 | size_t i; | |
4364 | tree shadowed; | |
836495aa | 4365 | |
6198e8f6 | 4366 | bool subtime = timevar_cond_start (TV_NAME_LOOKUP); |
4fd9bd13 | 4367 | gcc_assert (level != 0); |
9031d10b | 4368 | |
4fd9bd13 | 4369 | /* If we're leaving a toplevel class, cache its binding level. */ |
4370 | if (current_class_depth == 1) | |
4371 | previous_class_level = level; | |
4372 | for (shadowed = level->type_shadowed; | |
4373 | shadowed; | |
4374 | shadowed = TREE_CHAIN (shadowed)) | |
4375 | SET_IDENTIFIER_TYPE_VALUE (TREE_PURPOSE (shadowed), TREE_VALUE (shadowed)); | |
836495aa | 4376 | |
4fd9bd13 | 4377 | /* Remove the bindings for all of the class-level declarations. */ |
4378 | if (level->class_shadowed) | |
836495aa | 4379 | { |
4fd9bd13 | 4380 | FOR_EACH_VEC_ELT (*level->class_shadowed, i, cb) |
653e5405 | 4381 | { |
4fd9bd13 | 4382 | IDENTIFIER_BINDING (cb->identifier) = cb->base->previous; |
4383 | cxx_binding_free (cb->base); | |
653e5405 | 4384 | } |
4fd9bd13 | 4385 | ggc_free (level->class_shadowed); |
4386 | level->class_shadowed = NULL; | |
836495aa | 4387 | } |
4388 | ||
4fd9bd13 | 4389 | /* Now, pop out of the binding level which we created up in the |
4390 | `pushlevel_class' routine. */ | |
4391 | gcc_assert (current_binding_level == level); | |
4392 | leave_scope (); | |
4393 | timevar_cond_stop (TV_NAME_LOOKUP, subtime); | |
4394 | } | |
4395 | ||
4396 | /* Set INHERITED_VALUE_BINDING_P on BINDING to true or false, as | |
4397 | appropriate. DECL is the value to which a name has just been | |
4398 | bound. CLASS_TYPE is the class in which the lookup occurred. */ | |
4399 | ||
4400 | static void | |
4401 | set_inherited_value_binding_p (cxx_binding *binding, tree decl, | |
4402 | tree class_type) | |
4403 | { | |
4404 | if (binding->value == decl && TREE_CODE (decl) != TREE_LIST) | |
836495aa | 4405 | { |
4fd9bd13 | 4406 | tree context; |
4407 | ||
4408 | if (TREE_CODE (decl) == OVERLOAD) | |
4409 | context = ovl_scope (decl); | |
4a2849cb | 4410 | else |
c2e83164 | 4411 | { |
4fd9bd13 | 4412 | gcc_assert (DECL_P (decl)); |
4413 | context = context_for_name_lookup (decl); | |
c2e83164 | 4414 | } |
836495aa | 4415 | |
4fd9bd13 | 4416 | if (is_properly_derived_from (class_type, context)) |
4417 | INHERITED_VALUE_BINDING_P (binding) = 1; | |
4418 | else | |
4419 | INHERITED_VALUE_BINDING_P (binding) = 0; | |
4420 | } | |
4421 | else if (binding->value == decl) | |
4422 | /* We only encounter a TREE_LIST when there is an ambiguity in the | |
4423 | base classes. Such an ambiguity can be overridden by a | |
4424 | definition in this class. */ | |
4425 | INHERITED_VALUE_BINDING_P (binding) = 1; | |
4426 | else | |
4427 | INHERITED_VALUE_BINDING_P (binding) = 0; | |
836495aa | 4428 | } |
4429 | ||
4fd9bd13 | 4430 | /* Make the declaration of X appear in CLASS scope. */ |
836495aa | 4431 | |
4fd9bd13 | 4432 | bool |
4433 | pushdecl_class_level (tree x) | |
836495aa | 4434 | { |
4fd9bd13 | 4435 | bool is_valid = true; |
4436 | bool subtime; | |
836495aa | 4437 | |
4fd9bd13 | 4438 | /* Do nothing if we're adding to an outer lambda closure type, |
4439 | outer_binding will add it later if it's needed. */ | |
4440 | if (current_class_type != class_binding_level->this_entity) | |
4441 | return true; | |
836495aa | 4442 | |
4fd9bd13 | 4443 | subtime = timevar_cond_start (TV_NAME_LOOKUP); |
4444 | /* Get the name of X. */ | |
6767ca9a | 4445 | tree name = OVL_NAME (x); |
836495aa | 4446 | |
4fd9bd13 | 4447 | if (name) |
836495aa | 4448 | { |
4fd9bd13 | 4449 | is_valid = push_class_level_binding (name, x); |
4450 | if (TREE_CODE (x) == TYPE_DECL) | |
4451 | set_identifier_type_value (name, x); | |
836495aa | 4452 | } |
4fd9bd13 | 4453 | else if (ANON_AGGR_TYPE_P (TREE_TYPE (x))) |
4454 | { | |
4455 | /* If X is an anonymous aggregate, all of its members are | |
4456 | treated as if they were members of the class containing the | |
4457 | aggregate, for naming purposes. */ | |
4458 | tree f; | |
836495aa | 4459 | |
4fd9bd13 | 4460 | for (f = TYPE_FIELDS (TREE_TYPE (x)); f; f = DECL_CHAIN (f)) |
4461 | { | |
4462 | location_t save_location = input_location; | |
4463 | input_location = DECL_SOURCE_LOCATION (f); | |
4464 | if (!pushdecl_class_level (f)) | |
4465 | is_valid = false; | |
4466 | input_location = save_location; | |
4467 | } | |
4468 | } | |
6198e8f6 | 4469 | timevar_cond_stop (TV_NAME_LOOKUP, subtime); |
4fd9bd13 | 4470 | return is_valid; |
836495aa | 4471 | } |
4472 | ||
4fd9bd13 | 4473 | /* Return the BINDING (if any) for NAME in SCOPE, which is a class |
4474 | scope. If the value returned is non-NULL, and the PREVIOUS field | |
4475 | is not set, callers must set the PREVIOUS field explicitly. */ | |
cc9a4194 | 4476 | |
4fd9bd13 | 4477 | static cxx_binding * |
4478 | get_class_binding (tree name, cp_binding_level *scope) | |
cc9a4194 | 4479 | { |
4fd9bd13 | 4480 | tree class_type; |
4481 | tree type_binding; | |
4482 | tree value_binding; | |
4483 | cxx_binding *binding; | |
cc9a4194 | 4484 | |
4fd9bd13 | 4485 | class_type = scope->this_entity; |
cc9a4194 | 4486 | |
4fd9bd13 | 4487 | /* Get the type binding. */ |
4488 | type_binding = lookup_member (class_type, name, | |
4489 | /*protect=*/2, /*want_type=*/true, | |
4490 | tf_warning_or_error); | |
4491 | /* Get the value binding. */ | |
4492 | value_binding = lookup_member (class_type, name, | |
4493 | /*protect=*/2, /*want_type=*/false, | |
4494 | tf_warning_or_error); | |
cc9a4194 | 4495 | |
4fd9bd13 | 4496 | if (value_binding |
4497 | && (TREE_CODE (value_binding) == TYPE_DECL | |
4498 | || DECL_CLASS_TEMPLATE_P (value_binding) | |
4499 | || (TREE_CODE (value_binding) == TREE_LIST | |
4500 | && TREE_TYPE (value_binding) == error_mark_node | |
4501 | && (TREE_CODE (TREE_VALUE (value_binding)) | |
4502 | == TYPE_DECL)))) | |
4503 | /* We found a type binding, even when looking for a non-type | |
4504 | binding. This means that we already processed this binding | |
4505 | above. */ | |
4506 | ; | |
4507 | else if (value_binding) | |
4508 | { | |
4509 | if (TREE_CODE (value_binding) == TREE_LIST | |
4510 | && TREE_TYPE (value_binding) == error_mark_node) | |
4511 | /* NAME is ambiguous. */ | |
4512 | ; | |
4513 | else if (BASELINK_P (value_binding)) | |
4514 | /* NAME is some overloaded functions. */ | |
4515 | value_binding = BASELINK_FUNCTIONS (value_binding); | |
4516 | } | |
cc9a4194 | 4517 | |
4fd9bd13 | 4518 | /* If we found either a type binding or a value binding, create a |
4519 | new binding object. */ | |
4520 | if (type_binding || value_binding) | |
4521 | { | |
4522 | binding = new_class_binding (name, | |
4523 | value_binding, | |
4524 | type_binding, | |
4525 | scope); | |
4526 | /* This is a class-scope binding, not a block-scope binding. */ | |
4527 | LOCAL_BINDING_P (binding) = 0; | |
4528 | set_inherited_value_binding_p (binding, value_binding, class_type); | |
4529 | } | |
6198e8f6 | 4530 | else |
4fd9bd13 | 4531 | binding = NULL; |
4532 | ||
4533 | return binding; | |
6198e8f6 | 4534 | } |
4535 | ||
4fd9bd13 | 4536 | /* Make the declaration(s) of X appear in CLASS scope under the name |
4537 | NAME. Returns true if the binding is valid. */ | |
6198e8f6 | 4538 | |
4fd9bd13 | 4539 | static bool |
4540 | push_class_level_binding_1 (tree name, tree x) | |
6198e8f6 | 4541 | { |
4fd9bd13 | 4542 | cxx_binding *binding; |
4543 | tree decl = x; | |
4544 | bool ok; | |
cc9a4194 | 4545 | |
4fd9bd13 | 4546 | /* The class_binding_level will be NULL if x is a template |
4547 | parameter name in a member template. */ | |
4548 | if (!class_binding_level) | |
4549 | return true; | |
cc9a4194 | 4550 | |
4fd9bd13 | 4551 | if (name == error_mark_node) |
4552 | return false; | |
f75d14ca | 4553 | |
4fd9bd13 | 4554 | /* Can happen for an erroneous declaration (c++/60384). */ |
4555 | if (!identifier_p (name)) | |
4556 | { | |
4557 | gcc_assert (errorcount || sorrycount); | |
4558 | return false; | |
4559 | } | |
cc9a4194 | 4560 | |
4fd9bd13 | 4561 | /* Check for invalid member names. But don't worry about a default |
4562 | argument-scope lambda being pushed after the class is complete. */ | |
4563 | gcc_assert (TYPE_BEING_DEFINED (current_class_type) | |
4564 | || LAMBDA_TYPE_P (TREE_TYPE (decl))); | |
4565 | /* Check that we're pushing into the right binding level. */ | |
4566 | gcc_assert (current_class_type == class_binding_level->this_entity); | |
cc9a4194 | 4567 | |
4fd9bd13 | 4568 | /* We could have been passed a tree list if this is an ambiguous |
4569 | declaration. If so, pull the declaration out because | |
4570 | check_template_shadow will not handle a TREE_LIST. */ | |
4571 | if (TREE_CODE (decl) == TREE_LIST | |
4572 | && TREE_TYPE (decl) == error_mark_node) | |
4573 | decl = TREE_VALUE (decl); | |
2b49746a | 4574 | |
4fd9bd13 | 4575 | if (!check_template_shadow (decl)) |
4576 | return false; | |
cc9a4194 | 4577 | |
4fd9bd13 | 4578 | /* [class.mem] |
836495aa | 4579 | |
4fd9bd13 | 4580 | If T is the name of a class, then each of the following shall |
4581 | have a name different from T: | |
836495aa | 4582 | |
4fd9bd13 | 4583 | -- every static data member of class T; |
836495aa | 4584 | |
4fd9bd13 | 4585 | -- every member of class T that is itself a type; |
4586 | ||
4587 | -- every enumerator of every member of class T that is an | |
4588 | enumerated type; | |
4589 | ||
4590 | -- every member of every anonymous union that is a member of | |
4591 | class T. | |
4592 | ||
4593 | (Non-static data members were also forbidden to have the same | |
4594 | name as T until TC1.) */ | |
4595 | if ((VAR_P (x) | |
4596 | || TREE_CODE (x) == CONST_DECL | |
4597 | || (TREE_CODE (x) == TYPE_DECL | |
4598 | && !DECL_SELF_REFERENCE_P (x)) | |
4599 | /* A data member of an anonymous union. */ | |
4600 | || (TREE_CODE (x) == FIELD_DECL | |
4601 | && DECL_CONTEXT (x) != current_class_type)) | |
6c26e5e5 | 4602 | && DECL_NAME (x) == DECL_NAME (TYPE_NAME (current_class_type))) |
4fd9bd13 | 4603 | { |
4604 | tree scope = context_for_name_lookup (x); | |
4605 | if (TYPE_P (scope) && same_type_p (scope, current_class_type)) | |
4606 | { | |
4607 | error ("%qD has the same name as the class in which it is " | |
4608 | "declared", | |
4609 | x); | |
4610 | return false; | |
4611 | } | |
4612 | } | |
4613 | ||
4614 | /* Get the current binding for NAME in this class, if any. */ | |
4615 | binding = IDENTIFIER_BINDING (name); | |
4616 | if (!binding || binding->scope != class_binding_level) | |
836495aa | 4617 | { |
4fd9bd13 | 4618 | binding = get_class_binding (name, class_binding_level); |
4619 | /* If a new binding was created, put it at the front of the | |
4620 | IDENTIFIER_BINDING list. */ | |
4621 | if (binding) | |
653e5405 | 4622 | { |
4fd9bd13 | 4623 | binding->previous = IDENTIFIER_BINDING (name); |
4624 | IDENTIFIER_BINDING (name) = binding; | |
653e5405 | 4625 | } |
4fd9bd13 | 4626 | } |
4627 | ||
4628 | /* If there is already a binding, then we may need to update the | |
4629 | current value. */ | |
4630 | if (binding && binding->value) | |
4631 | { | |
4632 | tree bval = binding->value; | |
4633 | tree old_decl = NULL_TREE; | |
4634 | tree target_decl = strip_using_decl (decl); | |
4635 | tree target_bval = strip_using_decl (bval); | |
4636 | ||
4637 | if (INHERITED_VALUE_BINDING_P (binding)) | |
653e5405 | 4638 | { |
4fd9bd13 | 4639 | /* If the old binding was from a base class, and was for a |
4640 | tag name, slide it over to make room for the new binding. | |
4641 | The old binding is still visible if explicitly qualified | |
4642 | with a class-key. */ | |
4643 | if (TREE_CODE (target_bval) == TYPE_DECL | |
4644 | && DECL_ARTIFICIAL (target_bval) | |
4645 | && !(TREE_CODE (target_decl) == TYPE_DECL | |
4646 | && DECL_ARTIFICIAL (target_decl))) | |
4647 | { | |
4648 | old_decl = binding->type; | |
4649 | binding->type = bval; | |
4650 | binding->value = NULL_TREE; | |
4651 | INHERITED_VALUE_BINDING_P (binding) = 0; | |
4652 | } | |
4653 | else | |
4654 | { | |
4655 | old_decl = bval; | |
4656 | /* Any inherited type declaration is hidden by the type | |
4657 | declaration in the derived class. */ | |
4658 | if (TREE_CODE (target_decl) == TYPE_DECL | |
4659 | && DECL_ARTIFICIAL (target_decl)) | |
4660 | binding->type = NULL_TREE; | |
4661 | } | |
836495aa | 4662 | } |
4fd9bd13 | 4663 | else if (TREE_CODE (target_decl) == OVERLOAD |
d6cc2ec2 | 4664 | && OVL_P (target_bval)) |
4fd9bd13 | 4665 | old_decl = bval; |
4666 | else if (TREE_CODE (decl) == USING_DECL | |
4667 | && TREE_CODE (bval) == USING_DECL | |
4668 | && same_type_p (USING_DECL_SCOPE (decl), | |
4669 | USING_DECL_SCOPE (bval))) | |
4670 | /* This is a using redeclaration that will be diagnosed later | |
4671 | in supplement_binding */ | |
4672 | ; | |
4673 | else if (TREE_CODE (decl) == USING_DECL | |
4674 | && TREE_CODE (bval) == USING_DECL | |
4675 | && DECL_DEPENDENT_P (decl) | |
4676 | && DECL_DEPENDENT_P (bval)) | |
4677 | return true; | |
4678 | else if (TREE_CODE (decl) == USING_DECL | |
d6cc2ec2 | 4679 | && OVL_P (target_bval)) |
4fd9bd13 | 4680 | old_decl = bval; |
4681 | else if (TREE_CODE (bval) == USING_DECL | |
d6cc2ec2 | 4682 | && OVL_P (target_decl)) |
4fd9bd13 | 4683 | return true; |
4684 | ||
4685 | if (old_decl && binding->scope == class_binding_level) | |
653e5405 | 4686 | { |
4fd9bd13 | 4687 | binding->value = x; |
4688 | /* It is always safe to clear INHERITED_VALUE_BINDING_P | |
4689 | here. This function is only used to register bindings | |
4690 | from with the class definition itself. */ | |
4691 | INHERITED_VALUE_BINDING_P (binding) = 0; | |
4692 | return true; | |
653e5405 | 4693 | } |
836495aa | 4694 | } |
836495aa | 4695 | |
4fd9bd13 | 4696 | /* Note that we declared this value so that we can issue an error if |
4697 | this is an invalid redeclaration of a name already used for some | |
4698 | other purpose. */ | |
4699 | note_name_declared_in_class (name, decl); | |
6198e8f6 | 4700 | |
4fd9bd13 | 4701 | /* If we didn't replace an existing binding, put the binding on the |
4702 | stack of bindings for the identifier, and update the shadowed | |
4703 | list. */ | |
4704 | if (binding && binding->scope == class_binding_level) | |
4705 | /* Supplement the existing binding. */ | |
4706 | ok = supplement_binding (binding, decl); | |
4707 | else | |
cc9a4194 | 4708 | { |
4fd9bd13 | 4709 | /* Create a new binding. */ |
4710 | push_binding (name, decl, class_binding_level); | |
4711 | ok = true; | |
cc9a4194 | 4712 | } |
4713 | ||
4fd9bd13 | 4714 | return ok; |
6198e8f6 | 4715 | } |
4716 | ||
4fd9bd13 | 4717 | /* Wrapper for push_class_level_binding_1. */ |
6198e8f6 | 4718 | |
4fd9bd13 | 4719 | bool |
4720 | push_class_level_binding (tree name, tree x) | |
6198e8f6 | 4721 | { |
4fd9bd13 | 4722 | bool ret; |
6198e8f6 | 4723 | bool subtime = timevar_cond_start (TV_NAME_LOOKUP); |
4fd9bd13 | 4724 | ret = push_class_level_binding_1 (name, x); |
6198e8f6 | 4725 | timevar_cond_stop (TV_NAME_LOOKUP, subtime); |
4fd9bd13 | 4726 | return ret; |
cc9a4194 | 4727 | } |
4728 | ||
4fd9bd13 | 4729 | /* Process "using SCOPE::NAME" in a class scope. Return the |
4730 | USING_DECL created. */ | |
cc9a4194 | 4731 | |
4fd9bd13 | 4732 | tree |
4733 | do_class_using_decl (tree scope, tree name) | |
cc9a4194 | 4734 | { |
4fd9bd13 | 4735 | if (name == error_mark_node) |
4736 | return NULL_TREE; | |
f75d14ca | 4737 | |
4fd9bd13 | 4738 | if (!scope || !TYPE_P (scope)) |
4739 | { | |
4740 | error ("using-declaration for non-member at class scope"); | |
4741 | return NULL_TREE; | |
4742 | } | |
f75d14ca | 4743 | |
4fd9bd13 | 4744 | /* Make sure the name is not invalid */ |
4745 | if (TREE_CODE (name) == BIT_NOT_EXPR) | |
2b49746a | 4746 | { |
4fd9bd13 | 4747 | error ("%<%T::%D%> names destructor", scope, name); |
4748 | return NULL_TREE; | |
2b49746a | 4749 | } |
67622d53 | 4750 | |
4fd9bd13 | 4751 | /* Using T::T declares inheriting ctors, even if T is a typedef. */ |
4752 | if (MAYBE_CLASS_TYPE_P (scope) | |
4753 | && (name == TYPE_IDENTIFIER (scope) | |
4754 | || constructor_name_p (name, scope))) | |
2b49746a | 4755 | { |
4fd9bd13 | 4756 | maybe_warn_cpp0x (CPP0X_INHERITING_CTORS); |
4757 | name = ctor_identifier; | |
4758 | CLASSTYPE_NON_AGGREGATE (current_class_type) = true; | |
5d8a39b7 | 4759 | } |
67622d53 | 4760 | |
4761 | /* Cannot introduce a constructor name. */ | |
4fd9bd13 | 4762 | if (constructor_name_p (name, current_class_type)) |
4763 | { | |
4764 | error ("%<%T::%D%> names constructor in %qT", | |
4765 | scope, name, current_class_type); | |
4766 | return NULL_TREE; | |
4767 | } | |
4768 | ||
4fd9bd13 | 4769 | /* From [namespace.udecl]: |
08f9c377 | 4770 | |
4fd9bd13 | 4771 | A using-declaration used as a member-declaration shall refer to a |
4772 | member of a base class of the class being defined. | |
4773 | ||
4774 | In general, we cannot check this constraint in a template because | |
4775 | we do not know the entire set of base classes of the current | |
4776 | class type. Morover, if SCOPE is dependent, it might match a | |
4777 | non-dependent base. */ | |
4778 | ||
67622d53 | 4779 | tree decl = NULL_TREE; |
4780 | if (!dependent_scope_p (scope)) | |
a5ed46c9 | 4781 | { |
4fd9bd13 | 4782 | base_kind b_kind; |
67622d53 | 4783 | tree binfo = lookup_base (current_class_type, scope, ba_any, &b_kind, |
4784 | tf_warning_or_error); | |
4fd9bd13 | 4785 | if (b_kind < bk_proper_base) |
a5ed46c9 | 4786 | { |
67622d53 | 4787 | /* If there are dependent bases, scope might resolve at |
4788 | instantiation time, even if it isn't exactly one of the | |
4789 | dependent bases. */ | |
4790 | if (b_kind == bk_same_type || !any_dependent_bases_p ()) | |
848bf3dc | 4791 | { |
4fd9bd13 | 4792 | error_not_base_type (scope, current_class_type); |
4793 | return NULL_TREE; | |
848bf3dc | 4794 | } |
a5ed46c9 | 4795 | } |
b56115ac | 4796 | else if (name == ctor_identifier && !binfo_direct_p (binfo)) |
4fd9bd13 | 4797 | { |
4798 | error ("cannot inherit constructors from indirect base %qT", scope); | |
4799 | return NULL_TREE; | |
4800 | } | |
67622d53 | 4801 | else if (!IDENTIFIER_CONV_OP_P (name) |
4802 | || !dependent_type_p (TREE_TYPE (name))) | |
4fd9bd13 | 4803 | { |
4804 | decl = lookup_member (binfo, name, 0, false, tf_warning_or_error); | |
4805 | if (!decl) | |
4806 | { | |
4807 | error ("no members matching %<%T::%D%> in %q#T", scope, name, | |
4808 | scope); | |
4809 | return NULL_TREE; | |
4810 | } | |
67622d53 | 4811 | |
4fd9bd13 | 4812 | /* The binfo from which the functions came does not matter. */ |
4813 | if (BASELINK_P (decl)) | |
4814 | decl = BASELINK_FUNCTIONS (decl); | |
4815 | } | |
a5ed46c9 | 4816 | } |
a5ed46c9 | 4817 | |
67622d53 | 4818 | tree value = build_lang_decl (USING_DECL, name, NULL_TREE); |
4fd9bd13 | 4819 | USING_DECL_DECLS (value) = decl; |
4820 | USING_DECL_SCOPE (value) = scope; | |
4821 | DECL_DEPENDENT_P (value) = !decl; | |
9a49d46b | 4822 | |
4fd9bd13 | 4823 | return value; |
9a49d46b | 4824 | } |
4825 | ||
4fd9bd13 | 4826 | \f |
f906dcc3 | 4827 | /* Return the binding for NAME in NS. If NS is NULL, look in |
4828 | global_namespace. */ | |
4829 | ||
9a49d46b | 4830 | tree |
9d79db40 | 4831 | get_namespace_binding (tree ns, tree name) |
9a49d46b | 4832 | { |
4fd9bd13 | 4833 | bool subtime = timevar_cond_start (TV_NAME_LOOKUP); |
f906dcc3 | 4834 | if (!ns) |
4835 | ns = global_namespace; | |
17d66324 | 4836 | gcc_checking_assert (!DECL_NAMESPACE_ALIAS (ns)); |
4837 | tree ret = find_namespace_value (ns, name); | |
4fd9bd13 | 4838 | timevar_cond_stop (TV_NAME_LOOKUP, subtime); |
17d66324 | 4839 | return ret; |
cc9a4194 | 4840 | } |
4841 | ||
41ff145b | 4842 | /* Set value binding of NAME in the global namespace to VAL. Does not |
9d79db40 | 4843 | add it to the list of things in the namespace. */ |
64b38a2d | 4844 | |
4fd9bd13 | 4845 | void |
9d79db40 | 4846 | set_global_binding (tree name, tree val) |
64b38a2d | 4847 | { |
4fd9bd13 | 4848 | bool subtime = timevar_cond_start (TV_NAME_LOOKUP); |
f906dcc3 | 4849 | |
b51f8f71 | 4850 | gcc_checking_assert (name == DECL_NAME (val)); |
17d66324 | 4851 | tree *slot = find_namespace_slot (global_namespace, name, true); |
4852 | tree old = MAYBE_STAT_DECL (*slot); | |
4853 | ||
4854 | if (!old) | |
4855 | *slot = val; | |
4856 | else if (old == val) | |
4857 | ; | |
4858 | else if (!STAT_HACK_P (*slot) | |
4859 | && TREE_CODE (val) == TYPE_DECL && DECL_ARTIFICIAL (val)) | |
4860 | *slot = stat_hack (old, val); | |
4861 | else if (!STAT_HACK_P (*slot) | |
4862 | && TREE_CODE (old) == TYPE_DECL && DECL_ARTIFICIAL (old)) | |
4863 | *slot = stat_hack (val, old); | |
4864 | else | |
4865 | /* The user's placed something in the implementor's | |
4866 | namespace. */ | |
4867 | diagnose_name_conflict (val, old); | |
f906dcc3 | 4868 | |
4fd9bd13 | 4869 | timevar_cond_stop (TV_NAME_LOOKUP, subtime); |
64b38a2d | 4870 | } |
4871 | ||
4fd9bd13 | 4872 | /* Set the context of a declaration to scope. Complain if we are not |
4873 | outside scope. */ | |
cc9a4194 | 4874 | |
4fd9bd13 | 4875 | void |
4876 | set_decl_namespace (tree decl, tree scope, bool friendp) | |
cc9a4194 | 4877 | { |
4fd9bd13 | 4878 | /* Get rid of namespace aliases. */ |
4879 | scope = ORIGINAL_NAMESPACE (scope); | |
8a58dc06 | 4880 | |
4fd9bd13 | 4881 | /* It is ok for friends to be qualified in parallel space. */ |
ccb7f6c9 | 4882 | if (!friendp && !is_nested_namespace (current_namespace, scope)) |
4fd9bd13 | 4883 | error ("declaration of %qD not in a namespace surrounding %qD", |
4884 | decl, scope); | |
4885 | DECL_CONTEXT (decl) = FROB_CONTEXT (scope); | |
8a58dc06 | 4886 | |
7edb2551 | 4887 | /* See whether this has been declared in the namespace or inline |
4888 | children. */ | |
4889 | tree old = NULL_TREE; | |
4890 | { | |
4891 | name_lookup lookup (DECL_NAME (decl), LOOKUP_HIDDEN); | |
4892 | if (!lookup.search_qualified (scope, /*usings=*/false)) | |
4893 | /* No old declaration at all. */ | |
4894 | goto not_found; | |
4895 | old = lookup.value; | |
4896 | } | |
9031d10b | 4897 | |
4fd9bd13 | 4898 | /* If it's a TREE_LIST, the result of the lookup was ambiguous. */ |
4899 | if (TREE_CODE (old) == TREE_LIST) | |
cc9a4194 | 4900 | { |
7edb2551 | 4901 | ambiguous: |
4902 | DECL_CONTEXT (decl) = FROB_CONTEXT (scope); | |
4fd9bd13 | 4903 | error ("reference to %qD is ambiguous", decl); |
4904 | print_candidates (old); | |
4905 | return; | |
4906 | } | |
7edb2551 | 4907 | |
4908 | if (!DECL_DECLARES_FUNCTION_P (decl)) | |
4fd9bd13 | 4909 | { |
4fd9bd13 | 4910 | /* Don't compare non-function decls with decls_match here, since |
4911 | it can't check for the correct constness at this | |
7edb2551 | 4912 | point. pushdecl will find those errors later. */ |
4913 | ||
4914 | /* We might have found it in an inline namespace child of SCOPE. */ | |
4915 | if (TREE_CODE (decl) == TREE_CODE (old)) | |
4916 | DECL_CONTEXT (decl) = DECL_CONTEXT (old); | |
4917 | ||
4918 | found: | |
4919 | /* Writing "N::i" to declare something directly in "N" is invalid. */ | |
4920 | if (CP_DECL_CONTEXT (decl) == current_namespace | |
4921 | && at_namespace_scope_p ()) | |
4922 | error ("explicit qualification in declaration of %qD", decl); | |
4fd9bd13 | 4923 | return; |
4924 | } | |
7edb2551 | 4925 | |
4fd9bd13 | 4926 | /* Since decl is a function, old should contain a function decl. */ |
a5aae789 | 4927 | if (!OVL_P (old)) |
7edb2551 | 4928 | goto not_found; |
4929 | ||
4fd9bd13 | 4930 | /* We handle these in check_explicit_instantiation_namespace. */ |
4931 | if (processing_explicit_instantiation) | |
4932 | return; | |
4933 | if (processing_template_decl || processing_specialization) | |
4934 | /* We have not yet called push_template_decl to turn a | |
4935 | FUNCTION_DECL into a TEMPLATE_DECL, so the declarations won't | |
4936 | match. But, we'll check later, when we construct the | |
4937 | template. */ | |
4938 | return; | |
4939 | /* Instantiations or specializations of templates may be declared as | |
4940 | friends in any namespace. */ | |
4941 | if (friendp && DECL_USE_TEMPLATE (decl)) | |
4942 | return; | |
7edb2551 | 4943 | |
4944 | tree found; | |
4945 | found = NULL_TREE; | |
4946 | ||
4947 | for (lkp_iterator iter (old); iter; ++iter) | |
4fd9bd13 | 4948 | { |
7edb2551 | 4949 | if (iter.using_p ()) |
4950 | continue; | |
5637ac62 | 4951 | |
7edb2551 | 4952 | tree ofn = *iter; |
4953 | ||
4954 | /* Adjust DECL_CONTEXT first so decls_match will return true | |
4955 | if DECL will match a declaration in an inline namespace. */ | |
4956 | DECL_CONTEXT (decl) = DECL_CONTEXT (ofn); | |
4957 | if (decls_match (decl, ofn)) | |
4fd9bd13 | 4958 | { |
7edb2551 | 4959 | if (found) |
4fd9bd13 | 4960 | { |
7edb2551 | 4961 | /* We found more than one matching declaration. */ |
4962 | DECL_CONTEXT (decl) = FROB_CONTEXT (scope); | |
4963 | goto ambiguous; | |
4fd9bd13 | 4964 | } |
7edb2551 | 4965 | found = ofn; |
cc9a4194 | 4966 | } |
4967 | } | |
7edb2551 | 4968 | |
4969 | if (found) | |
cc9a4194 | 4970 | { |
7edb2551 | 4971 | if (DECL_HIDDEN_FRIEND_P (found)) |
4972 | { | |
4973 | pedwarn (DECL_SOURCE_LOCATION (decl), 0, | |
4974 | "%qD has not been declared within %qD", decl, scope); | |
4975 | inform (DECL_SOURCE_LOCATION (found), | |
4976 | "only here as a %<friend%>"); | |
4977 | } | |
4978 | DECL_CONTEXT (decl) = DECL_CONTEXT (found); | |
4979 | goto found; | |
cc9a4194 | 4980 | } |
4fd9bd13 | 4981 | |
7edb2551 | 4982 | not_found: |
4fd9bd13 | 4983 | /* It didn't work, go back to the explicit scope. */ |
4984 | DECL_CONTEXT (decl) = FROB_CONTEXT (scope); | |
4fd9bd13 | 4985 | error ("%qD should have been declared inside %qD", decl, scope); |
cc9a4194 | 4986 | } |
4987 | ||
4fd9bd13 | 4988 | /* Return the namespace where the current declaration is declared. */ |
836495aa | 4989 | |
4990 | tree | |
4fd9bd13 | 4991 | current_decl_namespace (void) |
836495aa | 4992 | { |
4fd9bd13 | 4993 | tree result; |
4994 | /* If we have been pushed into a different namespace, use it. */ | |
4995 | if (!vec_safe_is_empty (decl_namespace_list)) | |
4996 | return decl_namespace_list->last (); | |
836495aa | 4997 | |
4fd9bd13 | 4998 | if (current_class_type) |
4999 | result = decl_namespace_context (current_class_type); | |
5000 | else if (current_function_decl) | |
5001 | result = decl_namespace_context (current_function_decl); | |
5002 | else | |
5003 | result = current_namespace; | |
5004 | return result; | |
836495aa | 5005 | } |
5006 | ||
4fd9bd13 | 5007 | /* Process any ATTRIBUTES on a namespace definition. Returns true if |
5008 | attribute visibility is seen. */ | |
836495aa | 5009 | |
4fd9bd13 | 5010 | bool |
5011 | handle_namespace_attrs (tree ns, tree attributes) | |
836495aa | 5012 | { |
4fd9bd13 | 5013 | tree d; |
5014 | bool saw_vis = false; | |
5015 | ||
5016 | for (d = attributes; d; d = TREE_CHAIN (d)) | |
83ae9f05 | 5017 | { |
4fd9bd13 | 5018 | tree name = get_attribute_name (d); |
5019 | tree args = TREE_VALUE (d); | |
5020 | ||
5021 | if (is_attribute_p ("visibility", name)) | |
5022 | { | |
5023 | /* attribute visibility is a property of the syntactic block | |
5024 | rather than the namespace as a whole, so we don't touch the | |
5025 | NAMESPACE_DECL at all. */ | |
5026 | tree x = args ? TREE_VALUE (args) : NULL_TREE; | |
5027 | if (x == NULL_TREE || TREE_CODE (x) != STRING_CST || TREE_CHAIN (args)) | |
5028 | { | |
5029 | warning (OPT_Wattributes, | |
5030 | "%qD attribute requires a single NTBS argument", | |
5031 | name); | |
5032 | continue; | |
5033 | } | |
5034 | ||
5035 | if (!TREE_PUBLIC (ns)) | |
5036 | warning (OPT_Wattributes, | |
5037 | "%qD attribute is meaningless since members of the " | |
5038 | "anonymous namespace get local symbols", name); | |
5039 | ||
5040 | push_visibility (TREE_STRING_POINTER (x), 1); | |
5041 | saw_vis = true; | |
5042 | } | |
5043 | else if (is_attribute_p ("abi_tag", name)) | |
5044 | { | |
475205a0 | 5045 | if (!DECL_NAME (ns)) |
4fd9bd13 | 5046 | { |
475205a0 | 5047 | warning (OPT_Wattributes, "ignoring %qD attribute on anonymous " |
4fd9bd13 | 5048 | "namespace", name); |
5049 | continue; | |
5050 | } | |
475205a0 | 5051 | if (!DECL_NAMESPACE_INLINE_P (ns)) |
4fd9bd13 | 5052 | { |
475205a0 | 5053 | warning (OPT_Wattributes, "ignoring %qD attribute on non-inline " |
4fd9bd13 | 5054 | "namespace", name); |
5055 | continue; | |
5056 | } | |
5057 | if (!args) | |
5058 | { | |
5059 | tree dn = DECL_NAME (ns); | |
5060 | args = build_string (IDENTIFIER_LENGTH (dn) + 1, | |
5061 | IDENTIFIER_POINTER (dn)); | |
5062 | TREE_TYPE (args) = char_array_type_node; | |
5063 | args = fix_string_type (args); | |
5064 | args = build_tree_list (NULL_TREE, args); | |
5065 | } | |
5066 | if (check_abi_tag_args (args, name)) | |
5067 | DECL_ATTRIBUTES (ns) = tree_cons (name, args, | |
5068 | DECL_ATTRIBUTES (ns)); | |
5069 | } | |
5070 | else | |
5071 | { | |
5072 | warning (OPT_Wattributes, "%qD attribute directive ignored", | |
5073 | name); | |
5074 | continue; | |
5075 | } | |
83ae9f05 | 5076 | } |
3f3fa556 | 5077 | |
4fd9bd13 | 5078 | return saw_vis; |
5079 | } | |
a5aae789 | 5080 | |
4fd9bd13 | 5081 | /* Temporarily set the namespace for the current declaration. */ |
3f3fa556 | 5082 | |
4fd9bd13 | 5083 | void |
5084 | push_decl_namespace (tree decl) | |
3f3fa556 | 5085 | { |
4fd9bd13 | 5086 | if (TREE_CODE (decl) != NAMESPACE_DECL) |
5087 | decl = decl_namespace_context (decl); | |
5088 | vec_safe_push (decl_namespace_list, ORIGINAL_NAMESPACE (decl)); | |
836495aa | 5089 | } |
5090 | ||
4fd9bd13 | 5091 | /* [namespace.memdef]/2 */ |
c1d4295f | 5092 | |
4fd9bd13 | 5093 | void |
5094 | pop_decl_namespace (void) | |
c1d4295f | 5095 | { |
4fd9bd13 | 5096 | decl_namespace_list->pop (); |
5097 | } | |
c1d4295f | 5098 | |
4fd9bd13 | 5099 | /* Process a namespace-alias declaration. */ |
f91726b4 | 5100 | |
5101 | void | |
4fd9bd13 | 5102 | do_namespace_alias (tree alias, tree name_space) |
f91726b4 | 5103 | { |
4fd9bd13 | 5104 | if (name_space == error_mark_node) |
5105 | return; | |
f91726b4 | 5106 | |
4fd9bd13 | 5107 | gcc_assert (TREE_CODE (name_space) == NAMESPACE_DECL); |
f91726b4 | 5108 | |
4fd9bd13 | 5109 | name_space = ORIGINAL_NAMESPACE (name_space); |
f91726b4 | 5110 | |
4fd9bd13 | 5111 | /* Build the alias. */ |
5112 | alias = build_lang_decl (NAMESPACE_DECL, alias, void_type_node); | |
5113 | DECL_NAMESPACE_ALIAS (alias) = name_space; | |
5114 | DECL_EXTERNAL (alias) = 1; | |
5115 | DECL_CONTEXT (alias) = FROB_CONTEXT (current_scope ()); | |
5116 | pushdecl (alias); | |
f91726b4 | 5117 | |
4fd9bd13 | 5118 | /* Emit debug info for namespace alias. */ |
5119 | if (!building_stmt_list_p ()) | |
5120 | (*debug_hooks->early_global_decl) (alias); | |
5121 | } | |
f91726b4 | 5122 | |
4fd9bd13 | 5123 | /* Like pushdecl, only it places X in the current namespace, |
5124 | if appropriate. */ | |
f91726b4 | 5125 | |
4fd9bd13 | 5126 | tree |
5127 | pushdecl_namespace_level (tree x, bool is_friend) | |
5128 | { | |
5129 | cp_binding_level *b = current_binding_level; | |
5130 | tree t; | |
f91726b4 | 5131 | |
4fd9bd13 | 5132 | bool subtime = timevar_cond_start (TV_NAME_LOOKUP); |
d6cc2ec2 | 5133 | t = do_pushdecl_with_scope |
adf347c7 | 5134 | (x, NAMESPACE_LEVEL (current_namespace), is_friend); |
f91726b4 | 5135 | |
4fd9bd13 | 5136 | /* Now, the type_shadowed stack may screw us. Munge it so it does |
5137 | what we want. */ | |
5138 | if (TREE_CODE (t) == TYPE_DECL) | |
24acd4ab | 5139 | { |
4fd9bd13 | 5140 | tree name = DECL_NAME (t); |
5141 | tree newval; | |
5142 | tree *ptr = (tree *)0; | |
5143 | for (; !global_scope_p (b); b = b->level_chain) | |
24acd4ab | 5144 | { |
4fd9bd13 | 5145 | tree shadowed = b->type_shadowed; |
5146 | for (; shadowed; shadowed = TREE_CHAIN (shadowed)) | |
5147 | if (TREE_PURPOSE (shadowed) == name) | |
5148 | { | |
5149 | ptr = &TREE_VALUE (shadowed); | |
5150 | /* Can't break out of the loop here because sometimes | |
5151 | a binding level will have duplicate bindings for | |
5152 | PT names. It's gross, but I haven't time to fix it. */ | |
5153 | } | |
5154 | } | |
5155 | newval = TREE_TYPE (t); | |
5156 | if (ptr == (tree *)0) | |
5157 | { | |
5158 | /* @@ This shouldn't be needed. My test case "zstring.cc" trips | |
5159 | up here if this is changed to an assertion. --KR */ | |
5160 | SET_IDENTIFIER_TYPE_VALUE (name, t); | |
5161 | } | |
5162 | else | |
5163 | { | |
5164 | *ptr = newval; | |
24acd4ab | 5165 | } |
24acd4ab | 5166 | } |
4fd9bd13 | 5167 | timevar_cond_stop (TV_NAME_LOOKUP, subtime); |
5168 | return t; | |
f91726b4 | 5169 | } |
5170 | ||
eb9d4ee4 | 5171 | /* Process a using-declaration appearing in namespace scope. */ |
f778e503 | 5172 | |
4fd9bd13 | 5173 | void |
eb9d4ee4 | 5174 | finish_namespace_using_decl (tree decl, tree scope, tree name) |
f778e503 | 5175 | { |
4fd9bd13 | 5176 | tree orig_decl = decl; |
90b33123 | 5177 | |
17d66324 | 5178 | gcc_checking_assert (current_binding_level->kind == sk_namespace |
5179 | && !processing_template_decl); | |
4fd9bd13 | 5180 | decl = validate_nonmember_using_decl (decl, scope, name); |
5181 | if (decl == NULL_TREE) | |
5182 | return; | |
f778e503 | 5183 | |
17d66324 | 5184 | tree *slot = find_namespace_slot (current_namespace, name, true); |
5185 | tree val = slot ? MAYBE_STAT_DECL (*slot) : NULL_TREE; | |
5186 | tree type = slot ? MAYBE_STAT_TYPE (*slot) : NULL_TREE; | |
5187 | do_nonmember_using_decl (scope, name, &val, &type); | |
5188 | if (STAT_HACK_P (*slot)) | |
5189 | { | |
5190 | STAT_DECL (*slot) = val; | |
5191 | STAT_TYPE (*slot) = type; | |
5192 | } | |
5193 | else if (type) | |
5194 | *slot = stat_hack (val, type); | |
5195 | else | |
5196 | *slot = val; | |
4fd9bd13 | 5197 | |
5198 | /* Emit debug info. */ | |
17d66324 | 5199 | cp_emit_debug_info_for_using (orig_decl, current_namespace); |
eb9d4ee4 | 5200 | } |
4fd9bd13 | 5201 | |
17d66324 | 5202 | /* Process a using-declaration at function scope. */ |
eb9d4ee4 | 5203 | |
5204 | void | |
5205 | finish_local_using_decl (tree decl, tree scope, tree name) | |
5206 | { | |
5207 | tree orig_decl = decl; | |
5208 | ||
5209 | gcc_checking_assert (current_binding_level->kind != sk_class | |
5210 | && current_binding_level->kind != sk_namespace); | |
5211 | decl = validate_nonmember_using_decl (decl, scope, name); | |
5212 | if (decl == NULL_TREE) | |
5213 | return; | |
5214 | ||
a5aae789 | 5215 | add_decl_expr (decl); |
eb9d4ee4 | 5216 | |
5217 | cxx_binding *binding = find_local_binding (current_binding_level, name); | |
5218 | tree value = binding ? binding->value : NULL_TREE; | |
5219 | tree type = binding ? binding->type : NULL_TREE; | |
5220 | ||
5221 | do_nonmember_using_decl (scope, name, &value, &type); | |
5222 | ||
5223 | if (!value) | |
5224 | ; | |
5225 | else if (binding && value == binding->value) | |
5226 | ; | |
5227 | else if (binding && binding->value && TREE_CODE (value) == OVERLOAD) | |
5228 | { | |
5229 | update_local_overload (IDENTIFIER_BINDING (name), value); | |
5230 | IDENTIFIER_BINDING (name)->value = value; | |
5231 | } | |
5232 | else | |
5233 | /* Install the new binding. */ | |
5234 | push_local_binding (name, value, true); | |
5235 | ||
5236 | if (!type) | |
5237 | ; | |
5238 | else if (binding && type == binding->type) | |
5239 | ; | |
5240 | else | |
5241 | { | |
5242 | push_local_binding (name, type, true); | |
5243 | set_identifier_type_value (name, type); | |
5244 | } | |
5245 | ||
5246 | /* Emit debug info. */ | |
5247 | if (!processing_template_decl) | |
5248 | cp_emit_debug_info_for_using (orig_decl, current_scope ()); | |
f778e503 | 5249 | } |
5250 | ||
4fd9bd13 | 5251 | /* Return the declarations that are members of the namespace NS. */ |
5252 | ||
5253 | tree | |
5254 | cp_namespace_decls (tree ns) | |
5255 | { | |
5256 | return NAMESPACE_LEVEL (ns)->names; | |
24acd4ab | 5257 | } |
5258 | ||
4fd9bd13 | 5259 | /* Combine prefer_type and namespaces_only into flags. */ |
93306221 | 5260 | |
4fd9bd13 | 5261 | static int |
5262 | lookup_flags (int prefer_type, int namespaces_only) | |
5263 | { | |
5264 | if (namespaces_only) | |
5265 | return LOOKUP_PREFER_NAMESPACES; | |
5266 | if (prefer_type > 1) | |
5267 | return LOOKUP_PREFER_TYPES; | |
5268 | if (prefer_type > 0) | |
5269 | return LOOKUP_PREFER_BOTH; | |
5270 | return 0; | |
5271 | } | |
93306221 | 5272 | |
4fd9bd13 | 5273 | /* Given a lookup that returned VAL, use FLAGS to decide if we want to |
5274 | ignore it or not. Subroutine of lookup_name_real and | |
5275 | lookup_type_scope. */ | |
d8ae6d22 | 5276 | |
5277 | static bool | |
4fd9bd13 | 5278 | qualify_lookup (tree val, int flags) |
d8ae6d22 | 5279 | { |
4fd9bd13 | 5280 | if (val == NULL_TREE) |
d8ae6d22 | 5281 | return false; |
4fd9bd13 | 5282 | if ((flags & LOOKUP_PREFER_NAMESPACES) && TREE_CODE (val) == NAMESPACE_DECL) |
5283 | return true; | |
5284 | if (flags & LOOKUP_PREFER_TYPES) | |
5285 | { | |
5286 | tree target_val = strip_using_decl (val); | |
5287 | if (TREE_CODE (target_val) == TYPE_DECL | |
5288 | || TREE_CODE (target_val) == TEMPLATE_DECL) | |
5289 | return true; | |
5290 | } | |
5291 | if (flags & (LOOKUP_PREFER_NAMESPACES | LOOKUP_PREFER_TYPES)) | |
f5774b88 | 5292 | return false; |
4fd9bd13 | 5293 | /* Look through lambda things that we shouldn't be able to see. */ |
6f20c785 | 5294 | if (!(flags & LOOKUP_HIDDEN) && is_lambda_ignored_entity (val)) |
4fd9bd13 | 5295 | return false; |
5296 | return true; | |
5297 | } | |
f5774b88 | 5298 | |
4fd9bd13 | 5299 | /* Suggest alternatives for NAME, an IDENTIFIER_NODE for which name |
5300 | lookup failed. Search through all available namespaces and print out | |
5301 | possible candidates. If no exact matches are found, and | |
5302 | SUGGEST_MISSPELLINGS is true, then also look for near-matches and | |
5303 | suggest the best near-match, if there is one. */ | |
d09ae6d5 | 5304 | |
4fd9bd13 | 5305 | void |
5306 | suggest_alternatives_for (location_t location, tree name, | |
5307 | bool suggest_misspellings) | |
d09ae6d5 | 5308 | { |
4fd9bd13 | 5309 | vec<tree> candidates = vNULL; |
f7564df4 | 5310 | vec<tree> worklist = vNULL; |
5311 | unsigned limit = PARAM_VALUE (CXX_MAX_NAMESPACES_FOR_DIAGNOSTIC_HELP); | |
5312 | bool limited = false; | |
5313 | ||
5314 | /* Breadth-first search of namespaces. Up to limit namespaces | |
5315 | searched (limit zero == unlimited). */ | |
5316 | worklist.safe_push (global_namespace); | |
5317 | for (unsigned ix = 0; ix != worklist.length (); ix++) | |
4fd9bd13 | 5318 | { |
f7564df4 | 5319 | tree ns = worklist[ix]; |
5ab16b09 | 5320 | name_lookup lookup (name); |
d09ae6d5 | 5321 | |
5ab16b09 | 5322 | if (lookup.search_qualified (ns, false)) |
5323 | candidates.safe_push (lookup.value); | |
836495aa | 5324 | |
f7564df4 | 5325 | if (!limited) |
836495aa | 5326 | { |
f7564df4 | 5327 | /* Look for child namespaces. We have to do this |
5328 | indirectly because they are chained in reverse order, | |
5329 | which is confusing to the user. */ | |
5330 | vec<tree> children = vNULL; | |
5331 | ||
5332 | for (tree decl = NAMESPACE_LEVEL (ns)->names; | |
5333 | decl; decl = TREE_CHAIN (decl)) | |
5334 | if (TREE_CODE (decl) == NAMESPACE_DECL | |
5ab16b09 | 5335 | && !DECL_NAMESPACE_ALIAS (decl) |
5336 | && !DECL_NAMESPACE_INLINE_P (decl)) | |
f7564df4 | 5337 | children.safe_push (decl); |
5338 | ||
5339 | while (!limited && !children.is_empty ()) | |
4fd9bd13 | 5340 | { |
f7564df4 | 5341 | if (worklist.length () == limit) |
5342 | { | |
5343 | /* Unconditionally warn that the search was truncated. */ | |
5344 | inform (location, | |
5345 | "maximum limit of %d namespaces searched for %qE", | |
5346 | limit, name); | |
5347 | limited = true; | |
5348 | } | |
5349 | else | |
5350 | worklist.safe_push (children.pop ()); | |
4fd9bd13 | 5351 | } |
f7564df4 | 5352 | children.release (); |
4fd9bd13 | 5353 | } |
4fd9bd13 | 5354 | } |
f7564df4 | 5355 | worklist.release (); |
9031d10b | 5356 | |
f7564df4 | 5357 | if (candidates.length ()) |
5358 | { | |
5359 | inform_n (location, candidates.length (), | |
5360 | "suggested alternative:", | |
5361 | "suggested alternatives:"); | |
5362 | for (unsigned ix = 0; ix != candidates.length (); ix++) | |
5363 | { | |
5364 | tree val = candidates[ix]; | |
9031d10b | 5365 | |
f7564df4 | 5366 | inform (location_of (val), " %qE", val); |
5367 | } | |
5368 | candidates.release (); | |
5369 | } | |
5370 | else if (!suggest_misspellings) | |
5371 | ; | |
5372 | else if (const char *fuzzy = lookup_name_fuzzy (name, FUZZY_LOOKUP_NAME)) | |
5373 | { | |
5374 | /* Show a spelling correction. */ | |
5375 | gcc_rich_location richloc (location); | |
836495aa | 5376 | |
f7564df4 | 5377 | richloc.add_fixit_replace (fuzzy); |
5378 | inform_at_rich_loc (&richloc, "suggested alternative: %qs", fuzzy); | |
5379 | } | |
4fd9bd13 | 5380 | } |
836495aa | 5381 | |
4fd9bd13 | 5382 | /* Subroutine of maybe_suggest_missing_header for handling unrecognized names |
5383 | for some of the most common names within "std::". | |
5384 | Given non-NULL NAME, a name for lookup within "std::", return the header | |
7f9c8569 | 5385 | name defining it within the C++ Standard Library (with '<' and '>'), |
4fd9bd13 | 5386 | or NULL. */ |
836495aa | 5387 | |
4fd9bd13 | 5388 | static const char * |
5389 | get_std_name_hint (const char *name) | |
5390 | { | |
5391 | struct std_name_hint | |
5392 | { | |
5393 | const char *name; | |
5394 | const char *header; | |
5395 | }; | |
5396 | static const std_name_hint hints[] = { | |
5397 | /* <array>. */ | |
7f9c8569 | 5398 | {"array", "<array>"}, // C++11 |
4fd9bd13 | 5399 | /* <deque>. */ |
7f9c8569 | 5400 | {"deque", "<deque>"}, |
4fd9bd13 | 5401 | /* <forward_list>. */ |
7f9c8569 | 5402 | {"forward_list", "<forward_list>"}, // C++11 |
4fd9bd13 | 5403 | /* <fstream>. */ |
7f9c8569 | 5404 | {"basic_filebuf", "<fstream>"}, |
5405 | {"basic_ifstream", "<fstream>"}, | |
5406 | {"basic_ofstream", "<fstream>"}, | |
5407 | {"basic_fstream", "<fstream>"}, | |
4fd9bd13 | 5408 | /* <iostream>. */ |
7f9c8569 | 5409 | {"cin", "<iostream>"}, |
5410 | {"cout", "<iostream>"}, | |
5411 | {"cerr", "<iostream>"}, | |
5412 | {"clog", "<iostream>"}, | |
5413 | {"wcin", "<iostream>"}, | |
5414 | {"wcout", "<iostream>"}, | |
5415 | {"wclog", "<iostream>"}, | |
4fd9bd13 | 5416 | /* <list>. */ |
7f9c8569 | 5417 | {"list", "<list>"}, |
4fd9bd13 | 5418 | /* <map>. */ |
7f9c8569 | 5419 | {"map", "<map>"}, |
5420 | {"multimap", "<map>"}, | |
4fd9bd13 | 5421 | /* <queue>. */ |
7f9c8569 | 5422 | {"queue", "<queue>"}, |
5423 | {"priority_queue", "<queue>"}, | |
4fd9bd13 | 5424 | /* <ostream>. */ |
7f9c8569 | 5425 | {"ostream", "<ostream>"}, |
5426 | {"wostream", "<ostream>"}, | |
5427 | {"ends", "<ostream>"}, | |
5428 | {"flush", "<ostream>"}, | |
5429 | {"endl", "<ostream>"}, | |
4fd9bd13 | 5430 | /* <set>. */ |
7f9c8569 | 5431 | {"set", "<set>"}, |
5432 | {"multiset", "<set>"}, | |
4fd9bd13 | 5433 | /* <sstream>. */ |
7f9c8569 | 5434 | {"basic_stringbuf", "<sstream>"}, |
5435 | {"basic_istringstream", "<sstream>"}, | |
5436 | {"basic_ostringstream", "<sstream>"}, | |
5437 | {"basic_stringstream", "<sstream>"}, | |
4fd9bd13 | 5438 | /* <stack>. */ |
7f9c8569 | 5439 | {"stack", "<stack>"}, |
4fd9bd13 | 5440 | /* <string>. */ |
7f9c8569 | 5441 | {"string", "<string>"}, |
5442 | {"wstring", "<string>"}, | |
5443 | {"u16string", "<string>"}, | |
5444 | {"u32string", "<string>"}, | |
4fd9bd13 | 5445 | /* <unordered_map>. */ |
7f9c8569 | 5446 | {"unordered_map", "<unordered_map>"}, // C++11 |
5447 | {"unordered_multimap", "<unordered_map>"}, // C++11 | |
4fd9bd13 | 5448 | /* <unordered_set>. */ |
7f9c8569 | 5449 | {"unordered_set", "<unordered_set>"}, // C++11 |
5450 | {"unordered_multiset", "<unordered_set>"}, // C++11 | |
4fd9bd13 | 5451 | /* <vector>. */ |
7f9c8569 | 5452 | {"vector", "<vector>"}, |
4fd9bd13 | 5453 | }; |
5454 | const size_t num_hints = sizeof (hints) / sizeof (hints[0]); | |
5455 | for (size_t i = 0; i < num_hints; i++) | |
5456 | { | |
5457 | if (0 == strcmp (name, hints[i].name)) | |
5458 | return hints[i].header; | |
5459 | } | |
5460 | return NULL; | |
5461 | } | |
836495aa | 5462 | |
55058771 | 5463 | /* If SCOPE is the "std" namespace, then suggest pertinent header |
5464 | files for NAME at LOCATION. | |
5465 | Return true iff a suggestion was offered. */ | |
836495aa | 5466 | |
55058771 | 5467 | static bool |
4fd9bd13 | 5468 | maybe_suggest_missing_header (location_t location, tree name, tree scope) |
5469 | { | |
5470 | if (scope == NULL_TREE) | |
55058771 | 5471 | return false; |
4fd9bd13 | 5472 | if (TREE_CODE (scope) != NAMESPACE_DECL) |
55058771 | 5473 | return false; |
4fd9bd13 | 5474 | /* We only offer suggestions for the "std" namespace. */ |
5475 | if (scope != std_node) | |
55058771 | 5476 | return false; |
4fd9bd13 | 5477 | gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE); |
9031d10b | 5478 | |
4fd9bd13 | 5479 | const char *name_str = IDENTIFIER_POINTER (name); |
5480 | const char *header_hint = get_std_name_hint (name_str); | |
55058771 | 5481 | if (!header_hint) |
5482 | return false; | |
5483 | ||
5484 | gcc_rich_location richloc (location); | |
5485 | maybe_add_include_fixit (&richloc, header_hint); | |
5486 | inform_at_rich_loc (&richloc, | |
5487 | "%<std::%s%> is defined in header %qs;" | |
5488 | " did you forget to %<#include %s%>?", | |
5489 | name_str, header_hint, header_hint); | |
5490 | return true; | |
4fd9bd13 | 5491 | } |
9031d10b | 5492 | |
4fd9bd13 | 5493 | /* Look for alternatives for NAME, an IDENTIFIER_NODE for which name |
5494 | lookup failed within the explicitly provided SCOPE. Suggest the | |
5495 | the best meaningful candidates (if any) as a fix-it hint. | |
5496 | Return true iff a suggestion was provided. */ | |
9031d10b | 5497 | |
4fd9bd13 | 5498 | bool |
5499 | suggest_alternative_in_explicit_scope (location_t location, tree name, | |
5500 | tree scope) | |
5501 | { | |
5502 | /* Resolve any namespace aliases. */ | |
5503 | scope = ORIGINAL_NAMESPACE (scope); | |
f9769e4a | 5504 | |
55058771 | 5505 | if (maybe_suggest_missing_header (location, name, scope)) |
5506 | return true; | |
5507 | ||
4fd9bd13 | 5508 | cp_binding_level *level = NAMESPACE_LEVEL (scope); |
eca1687b | 5509 | |
4fd9bd13 | 5510 | best_match <tree, const char *> bm (name); |
5511 | consider_binding_level (name, bm, level, false, FUZZY_LOOKUP_NAME); | |
eca1687b | 5512 | |
4fd9bd13 | 5513 | /* See if we have a good suggesion for the user. */ |
5514 | const char *fuzzy_name = bm.get_best_meaningful_candidate (); | |
5515 | if (fuzzy_name) | |
5516 | { | |
5517 | gcc_rich_location richloc (location); | |
5518 | richloc.add_fixit_replace (fuzzy_name); | |
5519 | inform_at_rich_loc (&richloc, "suggested alternative: %qs", | |
5520 | fuzzy_name); | |
5521 | return true; | |
5522 | } | |
eca1687b | 5523 | |
4fd9bd13 | 5524 | return false; |
5525 | } | |
eca1687b | 5526 | |
4fd9bd13 | 5527 | /* Look up NAME (an IDENTIFIER_NODE) in SCOPE (either a NAMESPACE_DECL |
5528 | or a class TYPE). | |
836495aa | 5529 | |
4fd9bd13 | 5530 | If PREFER_TYPE is > 0, we only return TYPE_DECLs or namespaces. |
5531 | If PREFER_TYPE is > 1, we only return TYPE_DECLs. | |
836495aa | 5532 | |
4fd9bd13 | 5533 | Returns a DECL (or OVERLOAD, or BASELINK) representing the |
5534 | declaration found. If no suitable declaration can be found, | |
5535 | ERROR_MARK_NODE is returned. If COMPLAIN is true and SCOPE is | |
5536 | neither a class-type nor a namespace a diagnostic is issued. */ | |
836495aa | 5537 | |
799f877e | 5538 | tree |
4fd9bd13 | 5539 | lookup_qualified_name (tree scope, tree name, int prefer_type, bool complain, |
5540 | bool find_hidden) | |
799f877e | 5541 | { |
4fd9bd13 | 5542 | tree t = NULL_TREE; |
5543 | ||
5544 | if (TREE_CODE (scope) == NAMESPACE_DECL) | |
5545 | { | |
4fd9bd13 | 5546 | int flags = lookup_flags (prefer_type, /*namespaces_only*/false); |
5547 | if (find_hidden) | |
5548 | flags |= LOOKUP_HIDDEN; | |
421bfc0f | 5549 | name_lookup lookup (name, flags); |
5550 | ||
5551 | if (qualified_namespace_lookup (scope, &lookup)) | |
5552 | t = lookup.value; | |
4fd9bd13 | 5553 | } |
5554 | else if (cxx_dialect != cxx98 && TREE_CODE (scope) == ENUMERAL_TYPE) | |
5555 | t = lookup_enumerator (scope, name); | |
5556 | else if (is_class_type (scope, complain)) | |
5557 | t = lookup_member (scope, name, 2, prefer_type, tf_warning_or_error); | |
5558 | ||
5559 | if (!t) | |
5560 | return error_mark_node; | |
5561 | return t; | |
799f877e | 5562 | } |
5563 | ||
4fd9bd13 | 5564 | /* [namespace.qual] |
5565 | Accepts the NAME to lookup and its qualifying SCOPE. | |
5566 | Returns the name/type pair found into the cxx_binding *RESULT, | |
5567 | or false on error. */ | |
e1316b34 | 5568 | |
4fd9bd13 | 5569 | static bool |
421bfc0f | 5570 | qualified_namespace_lookup (tree scope, name_lookup *lookup) |
5571 | { | |
4fd9bd13 | 5572 | timevar_start (TV_NAME_LOOKUP); |
421bfc0f | 5573 | query_oracle (lookup->name); |
5574 | bool found = lookup->search_qualified (ORIGINAL_NAMESPACE (scope)); | |
4fd9bd13 | 5575 | timevar_stop (TV_NAME_LOOKUP); |
421bfc0f | 5576 | return found; |
6198e8f6 | 5577 | } |
5578 | ||
4fd9bd13 | 5579 | /* Helper function for lookup_name_fuzzy. |
5580 | Traverse binding level LVL, looking for good name matches for NAME | |
5581 | (and BM). */ | |
5582 | static void | |
5583 | consider_binding_level (tree name, best_match <tree, const char *> &bm, | |
5584 | cp_binding_level *lvl, bool look_within_fields, | |
5585 | enum lookup_name_fuzzy_kind kind) | |
836495aa | 5586 | { |
4fd9bd13 | 5587 | if (look_within_fields) |
5588 | if (lvl->this_entity && TREE_CODE (lvl->this_entity) == RECORD_TYPE) | |
5589 | { | |
5590 | tree type = lvl->this_entity; | |
5591 | bool want_type_p = (kind == FUZZY_LOOKUP_TYPENAME); | |
5592 | tree best_matching_field | |
5593 | = lookup_member_fuzzy (type, name, want_type_p); | |
5594 | if (best_matching_field) | |
5595 | bm.consider (IDENTIFIER_POINTER (best_matching_field)); | |
5596 | } | |
836495aa | 5597 | |
4fd9bd13 | 5598 | for (tree t = lvl->names; t; t = TREE_CHAIN (t)) |
836495aa | 5599 | { |
4fd9bd13 | 5600 | tree d = t; |
836495aa | 5601 | |
4fd9bd13 | 5602 | /* OVERLOADs or decls from using declaration are wrapped into |
5603 | TREE_LIST. */ | |
5604 | if (TREE_CODE (d) == TREE_LIST) | |
5637ac62 | 5605 | d = OVL_FIRST (TREE_VALUE (d)); |
836495aa | 5606 | |
4fd9bd13 | 5607 | /* Don't use bindings from implicitly declared functions, |
5608 | as they were likely misspellings themselves. */ | |
5609 | if (TREE_TYPE (d) == error_mark_node) | |
5610 | continue; | |
836495aa | 5611 | |
4fd9bd13 | 5612 | /* Skip anticipated decls of builtin functions. */ |
5613 | if (TREE_CODE (d) == FUNCTION_DECL | |
5614 | && DECL_BUILT_IN (d) | |
5615 | && DECL_ANTICIPATED (d)) | |
5616 | continue; | |
6198e8f6 | 5617 | |
4fd9bd13 | 5618 | if (tree name = DECL_NAME (d)) |
5619 | /* Ignore internal names with spaces in them. */ | |
5620 | if (!strchr (IDENTIFIER_POINTER (name), ' ')) | |
5621 | bm.consider (IDENTIFIER_POINTER (name)); | |
5622 | } | |
6198e8f6 | 5623 | } |
5624 | ||
4fd9bd13 | 5625 | /* Search for near-matches for NAME within the current bindings, and within |
5626 | macro names, returning the best match as a const char *, or NULL if | |
5627 | no reasonable match is found. */ | |
6198e8f6 | 5628 | |
4fd9bd13 | 5629 | const char * |
5630 | lookup_name_fuzzy (tree name, enum lookup_name_fuzzy_kind kind) | |
74d6b34b | 5631 | { |
4fd9bd13 | 5632 | gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE); |
74d6b34b | 5633 | |
4fd9bd13 | 5634 | best_match <tree, const char *> bm (name); |
74d6b34b | 5635 | |
4fd9bd13 | 5636 | cp_binding_level *lvl; |
5637 | for (lvl = scope_chain->class_bindings; lvl; lvl = lvl->level_chain) | |
5638 | consider_binding_level (name, bm, lvl, true, kind); | |
74d6b34b | 5639 | |
4fd9bd13 | 5640 | for (lvl = current_binding_level; lvl; lvl = lvl->level_chain) |
5641 | consider_binding_level (name, bm, lvl, false, kind); | |
74d6b34b | 5642 | |
4fd9bd13 | 5643 | /* Consider macros: if the user misspelled a macro name e.g. "SOME_MACRO" |
5644 | as: | |
5645 | x = SOME_OTHER_MACRO (y); | |
5646 | then "SOME_OTHER_MACRO" will survive to the frontend and show up | |
5647 | as a misspelled identifier. | |
74d6b34b | 5648 | |
4fd9bd13 | 5649 | Use the best distance so far so that a candidate is only set if |
5650 | a macro is better than anything so far. This allows early rejection | |
5651 | (without calculating the edit distance) of macro names that must have | |
5652 | distance >= bm.get_best_distance (), and means that we only get a | |
5653 | non-NULL result for best_macro_match if it's better than any of | |
5654 | the identifiers already checked. */ | |
5655 | best_macro_match bmm (name, bm.get_best_distance (), parse_in); | |
5656 | cpp_hashnode *best_macro = bmm.get_best_meaningful_candidate (); | |
5657 | /* If a macro is the closest so far to NAME, consider it. */ | |
5658 | if (best_macro) | |
5659 | bm.consider ((const char *)best_macro->ident.str); | |
836495aa | 5660 | |
4fd9bd13 | 5661 | /* Try the "starts_decl_specifier_p" keywords to detect |
5662 | "singed" vs "signed" typos. */ | |
5663 | for (unsigned i = 0; i < num_c_common_reswords; i++) | |
5664 | { | |
5665 | const c_common_resword *resword = &c_common_reswords[i]; | |
836495aa | 5666 | |
4fd9bd13 | 5667 | if (kind == FUZZY_LOOKUP_TYPENAME) |
5668 | if (!cp_keyword_starts_decl_specifier_p (resword->rid)) | |
5669 | continue; | |
836495aa | 5670 | |
4fd9bd13 | 5671 | tree resword_identifier = ridpointers [resword->rid]; |
5672 | if (!resword_identifier) | |
5673 | continue; | |
5674 | gcc_assert (TREE_CODE (resword_identifier) == IDENTIFIER_NODE); | |
836495aa | 5675 | |
4fd9bd13 | 5676 | /* Only consider reserved words that survived the |
5677 | filtering in init_reswords (e.g. for -std). */ | |
991449b2 | 5678 | if (!IDENTIFIER_KEYWORD_P (resword_identifier)) |
4fd9bd13 | 5679 | continue; |
836495aa | 5680 | |
4fd9bd13 | 5681 | bm.consider (IDENTIFIER_POINTER (resword_identifier)); |
5682 | } | |
5683 | ||
5684 | return bm.get_best_meaningful_candidate (); | |
5685 | } | |
cc9a4194 | 5686 | |
4fd9bd13 | 5687 | /* Subroutine of outer_binding. |
cc9a4194 | 5688 | |
4fd9bd13 | 5689 | Returns TRUE if BINDING is a binding to a template parameter of |
5690 | SCOPE. In that case SCOPE is the scope of a primary template | |
5691 | parameter -- in the sense of G++, i.e, a template that has its own | |
5692 | template header. | |
cc9a4194 | 5693 | |
4fd9bd13 | 5694 | Returns FALSE otherwise. */ |
cc9a4194 | 5695 | |
5696 | static bool | |
4fd9bd13 | 5697 | binding_to_template_parms_of_scope_p (cxx_binding *binding, |
5698 | cp_binding_level *scope) | |
cc9a4194 | 5699 | { |
4fd9bd13 | 5700 | tree binding_value, tmpl, tinfo; |
5701 | int level; | |
cc9a4194 | 5702 | |
4fd9bd13 | 5703 | if (!binding || !scope || !scope->this_entity) |
5704 | return false; | |
5705 | ||
5706 | binding_value = binding->value ? binding->value : binding->type; | |
5707 | tinfo = get_template_info (scope->this_entity); | |
5708 | ||
5709 | /* BINDING_VALUE must be a template parm. */ | |
5710 | if (binding_value == NULL_TREE | |
5711 | || (!DECL_P (binding_value) | |
5712 | || !DECL_TEMPLATE_PARM_P (binding_value))) | |
5713 | return false; | |
5714 | ||
5715 | /* The level of BINDING_VALUE. */ | |
5716 | level = | |
5717 | template_type_parameter_p (binding_value) | |
5718 | ? TEMPLATE_PARM_LEVEL (TEMPLATE_TYPE_PARM_INDEX | |
5719 | (TREE_TYPE (binding_value))) | |
5720 | : TEMPLATE_PARM_LEVEL (DECL_INITIAL (binding_value)); | |
5721 | ||
5722 | /* The template of the current scope, iff said scope is a primary | |
5723 | template. */ | |
5724 | tmpl = (tinfo | |
5725 | && PRIMARY_TEMPLATE_P (TI_TEMPLATE (tinfo)) | |
5726 | ? TI_TEMPLATE (tinfo) | |
5727 | : NULL_TREE); | |
5728 | ||
5729 | /* If the level of the parm BINDING_VALUE equals the depth of TMPL, | |
5730 | then BINDING_VALUE is a parameter of TMPL. */ | |
5731 | return (tmpl && level == TMPL_PARMS_DEPTH (DECL_TEMPLATE_PARMS (tmpl))); | |
cc9a4194 | 5732 | } |
5733 | ||
4fd9bd13 | 5734 | /* Return the innermost non-namespace binding for NAME from a scope |
5735 | containing BINDING, or, if BINDING is NULL, the current scope. | |
5736 | Please note that for a given template, the template parameters are | |
5737 | considered to be in the scope containing the current scope. | |
5738 | If CLASS_P is false, then class bindings are ignored. */ | |
a5ed46c9 | 5739 | |
4fd9bd13 | 5740 | cxx_binding * |
5741 | outer_binding (tree name, | |
5742 | cxx_binding *binding, | |
5743 | bool class_p) | |
a5ed46c9 | 5744 | { |
4fd9bd13 | 5745 | cxx_binding *outer; |
5746 | cp_binding_level *scope; | |
5747 | cp_binding_level *outer_scope; | |
7c533e5e | 5748 | |
4fd9bd13 | 5749 | if (binding) |
a5ed46c9 | 5750 | { |
4fd9bd13 | 5751 | scope = binding->scope->level_chain; |
5752 | outer = binding->previous; | |
5753 | } | |
5754 | else | |
5755 | { | |
5756 | scope = current_binding_level; | |
5757 | outer = IDENTIFIER_BINDING (name); | |
a5ed46c9 | 5758 | } |
4fd9bd13 | 5759 | outer_scope = outer ? outer->scope : NULL; |
7c533e5e | 5760 | |
4fd9bd13 | 5761 | /* Because we create class bindings lazily, we might be missing a |
5762 | class binding for NAME. If there are any class binding levels | |
5763 | between the LAST_BINDING_LEVEL and the scope in which OUTER was | |
5764 | declared, we must lookup NAME in those class scopes. */ | |
5765 | if (class_p) | |
5766 | while (scope && scope != outer_scope && scope->kind != sk_namespace) | |
5767 | { | |
5768 | if (scope->kind == sk_class) | |
5769 | { | |
5770 | cxx_binding *class_binding; | |
7c533e5e | 5771 | |
4fd9bd13 | 5772 | class_binding = get_class_binding (name, scope); |
5773 | if (class_binding) | |
5774 | { | |
5775 | /* Thread this new class-scope binding onto the | |
5776 | IDENTIFIER_BINDING list so that future lookups | |
5777 | find it quickly. */ | |
5778 | class_binding->previous = outer; | |
5779 | if (binding) | |
5780 | binding->previous = class_binding; | |
5781 | else | |
5782 | IDENTIFIER_BINDING (name) = class_binding; | |
5783 | return class_binding; | |
5784 | } | |
5785 | } | |
5786 | /* If we are in a member template, the template parms of the member | |
5787 | template are considered to be inside the scope of the containing | |
5788 | class, but within G++ the class bindings are all pushed between the | |
5789 | template parms and the function body. So if the outer binding is | |
5790 | a template parm for the current scope, return it now rather than | |
5791 | look for a class binding. */ | |
5792 | if (outer_scope && outer_scope->kind == sk_template_parms | |
5793 | && binding_to_template_parms_of_scope_p (outer, scope)) | |
5794 | return outer; | |
5795 | ||
5796 | scope = scope->level_chain; | |
5797 | } | |
5798 | ||
5799 | return outer; | |
a5ed46c9 | 5800 | } |
5801 | ||
4fd9bd13 | 5802 | /* Return the innermost block-scope or class-scope value binding for |
5803 | NAME, or NULL_TREE if there is no such binding. */ | |
cc9a4194 | 5804 | |
4fd9bd13 | 5805 | tree |
5806 | innermost_non_namespace_value (tree name) | |
cc9a4194 | 5807 | { |
4fd9bd13 | 5808 | cxx_binding *binding; |
5809 | binding = outer_binding (name, /*binding=*/NULL, /*class_p=*/true); | |
5810 | return binding ? binding->value : NULL_TREE; | |
5811 | } | |
cc9a4194 | 5812 | |
4fd9bd13 | 5813 | /* Look up NAME in the current binding level and its superiors in the |
5814 | namespace of variables, functions and typedefs. Return a ..._DECL | |
5815 | node of some kind representing its definition if there is only one | |
5816 | such declaration, or return a TREE_LIST with all the overloaded | |
5817 | definitions if there are many, or return 0 if it is undefined. | |
5818 | Hidden name, either friend declaration or built-in function, are | |
5819 | not ignored. | |
a5ed46c9 | 5820 | |
4fd9bd13 | 5821 | If PREFER_TYPE is > 0, we prefer TYPE_DECLs or namespaces. |
5822 | If PREFER_TYPE is > 1, we reject non-type decls (e.g. namespaces). | |
5823 | Otherwise we prefer non-TYPE_DECLs. | |
9031d10b | 5824 | |
4fd9bd13 | 5825 | If NONCLASS is nonzero, bindings in class scopes are ignored. If |
5826 | BLOCK_P is false, bindings in block scopes are ignored. */ | |
93635a8e | 5827 | |
4fd9bd13 | 5828 | static tree |
5829 | lookup_name_real_1 (tree name, int prefer_type, int nonclass, bool block_p, | |
5830 | int namespaces_only, int flags) | |
5831 | { | |
5832 | cxx_binding *iter; | |
5833 | tree val = NULL_TREE; | |
cc9a4194 | 5834 | |
4fd9bd13 | 5835 | query_oracle (name); |
5836 | ||
5837 | /* Conversion operators are handled specially because ordinary | |
5838 | unqualified name lookup will not find template conversion | |
5839 | operators. */ | |
991449b2 | 5840 | if (IDENTIFIER_CONV_OP_P (name)) |
c1d4295f | 5841 | { |
4fd9bd13 | 5842 | cp_binding_level *level; |
c1d4295f | 5843 | |
4fd9bd13 | 5844 | for (level = current_binding_level; |
5845 | level && level->kind != sk_namespace; | |
5846 | level = level->level_chain) | |
5847 | { | |
5848 | tree class_type; | |
5849 | tree operators; | |
5850 | ||
5851 | /* A conversion operator can only be declared in a class | |
5852 | scope. */ | |
5853 | if (level->kind != sk_class) | |
5854 | continue; | |
5855 | ||
5856 | /* Lookup the conversion operator in the class. */ | |
5857 | class_type = level->this_entity; | |
5858 | operators = lookup_fnfields (class_type, name, /*protect=*/0); | |
5859 | if (operators) | |
5860 | return operators; | |
5861 | } | |
5862 | ||
5863 | return NULL_TREE; | |
c1d4295f | 5864 | } |
9031d10b | 5865 | |
4fd9bd13 | 5866 | flags |= lookup_flags (prefer_type, namespaces_only); |
5867 | ||
5868 | /* First, look in non-namespace scopes. */ | |
5869 | ||
5870 | if (current_class_type == NULL_TREE) | |
5871 | nonclass = 1; | |
cc9a4194 | 5872 | |
4fd9bd13 | 5873 | if (block_p || !nonclass) |
5874 | for (iter = outer_binding (name, NULL, !nonclass); | |
5875 | iter; | |
5876 | iter = outer_binding (name, iter, !nonclass)) | |
5877 | { | |
5878 | tree binding; | |
cc9a4194 | 5879 | |
4fd9bd13 | 5880 | /* Skip entities we don't want. */ |
5881 | if (LOCAL_BINDING_P (iter) ? !block_p : nonclass) | |
5882 | continue; | |
cc9a4194 | 5883 | |
4fd9bd13 | 5884 | /* If this is the kind of thing we're looking for, we're done. */ |
5885 | if (qualify_lookup (iter->value, flags)) | |
5886 | binding = iter->value; | |
5887 | else if ((flags & LOOKUP_PREFER_TYPES) | |
5888 | && qualify_lookup (iter->type, flags)) | |
5889 | binding = iter->type; | |
5890 | else | |
5891 | binding = NULL_TREE; | |
cc9a4194 | 5892 | |
4fd9bd13 | 5893 | if (binding) |
5894 | { | |
788172b2 | 5895 | if (TREE_CODE (binding) == TYPE_DECL && DECL_HIDDEN_P (binding)) |
4fd9bd13 | 5896 | { |
5897 | /* A non namespace-scope binding can only be hidden in the | |
5898 | presence of a local class, due to friend declarations. | |
cc9a4194 | 5899 | |
4fd9bd13 | 5900 | In particular, consider: |
0423517a | 5901 | |
4fd9bd13 | 5902 | struct C; |
5903 | void f() { | |
5904 | struct A { | |
5905 | friend struct B; | |
5906 | friend struct C; | |
5907 | void g() { | |
5908 | B* b; // error: B is hidden | |
5909 | C* c; // OK, finds ::C | |
5910 | } | |
5911 | }; | |
5912 | B *b; // error: B is hidden | |
5913 | C *c; // OK, finds ::C | |
5914 | struct B {}; | |
5915 | B *bb; // OK | |
5916 | } | |
cc9a4194 | 5917 | |
4fd9bd13 | 5918 | The standard says that "B" is a local class in "f" |
5919 | (but not nested within "A") -- but that name lookup | |
5920 | for "B" does not find this declaration until it is | |
5921 | declared directly with "f". | |
cc9a4194 | 5922 | |
4fd9bd13 | 5923 | In particular: |
9031d10b | 5924 | |
4fd9bd13 | 5925 | [class.friend] |
cc9a4194 | 5926 | |
4fd9bd13 | 5927 | If a friend declaration appears in a local class and |
5928 | the name specified is an unqualified name, a prior | |
5929 | declaration is looked up without considering scopes | |
5930 | that are outside the innermost enclosing non-class | |
5931 | scope. For a friend function declaration, if there is | |
5932 | no prior declaration, the program is ill-formed. For a | |
5933 | friend class declaration, if there is no prior | |
5934 | declaration, the class that is specified belongs to the | |
5935 | innermost enclosing non-class scope, but if it is | |
5936 | subsequently referenced, its name is not found by name | |
5937 | lookup until a matching declaration is provided in the | |
5938 | innermost enclosing nonclass scope. | |
46842e29 | 5939 | |
4fd9bd13 | 5940 | So just keep looking for a non-hidden binding. |
5941 | */ | |
5942 | gcc_assert (TREE_CODE (binding) == TYPE_DECL); | |
5943 | continue; | |
5944 | } | |
5945 | val = binding; | |
5946 | break; | |
5947 | } | |
5948 | } | |
ad6d03bb | 5949 | |
4fd9bd13 | 5950 | /* Now lookup in namespace scopes. */ |
5951 | if (!val) | |
9ff63f75 | 5952 | { |
5953 | name_lookup lookup (name, flags); | |
5954 | if (lookup.search_unqualified | |
5955 | (current_decl_namespace (), current_binding_level)) | |
5956 | val = lookup.value; | |
5957 | } | |
334f6ce1 | 5958 | |
4fd9bd13 | 5959 | /* If we have a single function from a using decl, pull it out. */ |
5960 | if (val && TREE_CODE (val) == OVERLOAD && !really_overloaded_fn (val)) | |
5961 | val = OVL_FUNCTION (val); | |
5962 | ||
5963 | return val; | |
8e31c186 | 5964 | } |
5965 | ||
4fd9bd13 | 5966 | /* Wrapper for lookup_name_real_1. */ |
8e31c186 | 5967 | |
4fd9bd13 | 5968 | tree |
5969 | lookup_name_real (tree name, int prefer_type, int nonclass, bool block_p, | |
5970 | int namespaces_only, int flags) | |
8e31c186 | 5971 | { |
4fd9bd13 | 5972 | tree ret; |
5973 | bool subtime = timevar_cond_start (TV_NAME_LOOKUP); | |
5974 | ret = lookup_name_real_1 (name, prefer_type, nonclass, block_p, | |
5975 | namespaces_only, flags); | |
5976 | timevar_cond_stop (TV_NAME_LOOKUP, subtime); | |
5977 | return ret; | |
5978 | } | |
8e31c186 | 5979 | |
4fd9bd13 | 5980 | tree |
5981 | lookup_name_nonclass (tree name) | |
5982 | { | |
5983 | return lookup_name_real (name, 0, 1, /*block_p=*/true, 0, 0); | |
8e31c186 | 5984 | } |
5985 | ||
4fd9bd13 | 5986 | tree |
5987 | lookup_name (tree name) | |
5988 | { | |
5989 | return lookup_name_real (name, 0, 0, /*block_p=*/true, 0, 0); | |
5990 | } | |
8e31c186 | 5991 | |
4fd9bd13 | 5992 | tree |
5993 | lookup_name_prefer_type (tree name, int prefer_type) | |
8e31c186 | 5994 | { |
4fd9bd13 | 5995 | return lookup_name_real (name, prefer_type, 0, /*block_p=*/true, 0, 0); |
5996 | } | |
8e31c186 | 5997 | |
4fd9bd13 | 5998 | /* Look up NAME for type used in elaborated name specifier in |
5999 | the scopes given by SCOPE. SCOPE can be either TS_CURRENT or | |
6000 | TS_WITHIN_ENCLOSING_NON_CLASS. Although not implied by the | |
6001 | name, more scopes are checked if cleanup or template parameter | |
6002 | scope is encountered. | |
8e31c186 | 6003 | |
4fd9bd13 | 6004 | Unlike lookup_name_real, we make sure that NAME is actually |
6005 | declared in the desired scope, not from inheritance, nor using | |
6006 | directive. For using declaration, there is DR138 still waiting | |
6007 | to be resolved. Hidden name coming from an earlier friend | |
6008 | declaration is also returned. | |
8e31c186 | 6009 | |
4fd9bd13 | 6010 | A TYPE_DECL best matching the NAME is returned. Catching error |
6011 | and issuing diagnostics are caller's responsibility. */ | |
8e31c186 | 6012 | |
4fd9bd13 | 6013 | static tree |
6014 | lookup_type_scope_1 (tree name, tag_scope scope) | |
6015 | { | |
6016 | cxx_binding *iter = NULL; | |
6017 | tree val = NULL_TREE; | |
17d66324 | 6018 | cp_binding_level *level = NULL; |
8e31c186 | 6019 | |
4fd9bd13 | 6020 | /* Look in non-namespace scope first. */ |
6021 | if (current_binding_level->kind != sk_namespace) | |
6022 | iter = outer_binding (name, NULL, /*class_p=*/ true); | |
6023 | for (; iter; iter = outer_binding (name, iter, /*class_p=*/ true)) | |
cc9a4194 | 6024 | { |
4fd9bd13 | 6025 | /* Check if this is the kind of thing we're looking for. |
6026 | If SCOPE is TS_CURRENT, also make sure it doesn't come from | |
6027 | base class. For ITER->VALUE, we can simply use | |
6028 | INHERITED_VALUE_BINDING_P. For ITER->TYPE, we have to use | |
6029 | our own check. | |
cc9a4194 | 6030 | |
4fd9bd13 | 6031 | We check ITER->TYPE before ITER->VALUE in order to handle |
6032 | typedef struct C {} C; | |
6033 | correctly. */ | |
cc9a4194 | 6034 | |
4fd9bd13 | 6035 | if (qualify_lookup (iter->type, LOOKUP_PREFER_TYPES) |
6036 | && (scope != ts_current | |
6037 | || LOCAL_BINDING_P (iter) | |
6038 | || DECL_CONTEXT (iter->type) == iter->scope->this_entity)) | |
6039 | val = iter->type; | |
6040 | else if ((scope != ts_current | |
6041 | || !INHERITED_VALUE_BINDING_P (iter)) | |
6042 | && qualify_lookup (iter->value, LOOKUP_PREFER_TYPES)) | |
6043 | val = iter->value; | |
cc9a4194 | 6044 | |
4fd9bd13 | 6045 | if (val) |
6046 | break; | |
6047 | } | |
cc9a4194 | 6048 | |
4fd9bd13 | 6049 | /* Look in namespace scope. */ |
17d66324 | 6050 | if (val) |
6051 | level = iter->scope; | |
6052 | else | |
cc9a4194 | 6053 | { |
17d66324 | 6054 | tree ns = current_decl_namespace (); |
4fd9bd13 | 6055 | |
17d66324 | 6056 | if (tree *slot = find_namespace_slot (ns, name)) |
4fd9bd13 | 6057 | { |
6058 | /* If this is the kind of thing we're looking for, we're done. */ | |
17d66324 | 6059 | if (tree type = MAYBE_STAT_TYPE (*slot)) |
6060 | if (qualify_lookup (type, LOOKUP_PREFER_TYPES)) | |
6061 | val = type; | |
6062 | if (!val) | |
6063 | { | |
6064 | if (tree decl = MAYBE_STAT_DECL (*slot)) | |
6065 | if (qualify_lookup (decl, LOOKUP_PREFER_TYPES)) | |
6066 | val = decl; | |
6067 | } | |
6068 | level = NAMESPACE_LEVEL (ns); | |
4fd9bd13 | 6069 | } |
cc9a4194 | 6070 | } |
4fd9bd13 | 6071 | |
6072 | /* Type found, check if it is in the allowed scopes, ignoring cleanup | |
6073 | and template parameter scopes. */ | |
6074 | if (val) | |
cc9a4194 | 6075 | { |
4fd9bd13 | 6076 | cp_binding_level *b = current_binding_level; |
6077 | while (b) | |
6078 | { | |
17d66324 | 6079 | if (level == b) |
4fd9bd13 | 6080 | return val; |
d95d815d | 6081 | |
4fd9bd13 | 6082 | if (b->kind == sk_cleanup || b->kind == sk_template_parms |
6083 | || b->kind == sk_function_parms) | |
6084 | b = b->level_chain; | |
6085 | else if (b->kind == sk_class | |
6086 | && scope == ts_within_enclosing_non_class) | |
6087 | b = b->level_chain; | |
6088 | else | |
6089 | break; | |
6090 | } | |
cc9a4194 | 6091 | } |
cc9a4194 | 6092 | |
4fd9bd13 | 6093 | return NULL_TREE; |
cc9a4194 | 6094 | } |
4fd9bd13 | 6095 | |
6096 | /* Wrapper for lookup_type_scope_1. */ | |
cc9a4194 | 6097 | |
4fd9bd13 | 6098 | tree |
6099 | lookup_type_scope (tree name, tag_scope scope) | |
f352a3fb | 6100 | { |
4fd9bd13 | 6101 | tree ret; |
6102 | bool subtime = timevar_cond_start (TV_NAME_LOOKUP); | |
6103 | ret = lookup_type_scope_1 (name, scope); | |
6104 | timevar_cond_stop (TV_NAME_LOOKUP, subtime); | |
6105 | return ret; | |
f352a3fb | 6106 | } |
6107 | ||
4fd9bd13 | 6108 | /* Returns true iff DECL is a block-scope extern declaration of a function |
6109 | or variable. */ | |
6110 | ||
6111 | bool | |
6112 | is_local_extern (tree decl) | |
cc9a4194 | 6113 | { |
4fd9bd13 | 6114 | cxx_binding *binding; |
cc9a4194 | 6115 | |
4fd9bd13 | 6116 | /* For functions, this is easy. */ |
6117 | if (TREE_CODE (decl) == FUNCTION_DECL) | |
6118 | return DECL_LOCAL_FUNCTION_P (decl); | |
c1d4295f | 6119 | |
4fd9bd13 | 6120 | if (!VAR_P (decl)) |
6121 | return false; | |
6122 | if (!current_function_decl) | |
6123 | return false; | |
cc9a4194 | 6124 | |
4fd9bd13 | 6125 | /* For variables, this is not easy. We need to look at the binding stack |
6126 | for the identifier to see whether the decl we have is a local. */ | |
6127 | for (binding = IDENTIFIER_BINDING (DECL_NAME (decl)); | |
6128 | binding && binding->scope->kind != sk_namespace; | |
6129 | binding = binding->previous) | |
6130 | if (binding->value == decl) | |
6131 | return LOCAL_BINDING_P (binding); | |
cc9a4194 | 6132 | |
4fd9bd13 | 6133 | return false; |
6134 | } | |
d9e82d44 | 6135 | |
836495aa | 6136 | /* The type TYPE is being declared. If it is a class template, or a |
6137 | specialization of a class template, do any processing required and | |
6138 | perform error-checking. If IS_FRIEND is nonzero, this TYPE is | |
6139 | being declared a friend. B is the binding level at which this TYPE | |
6140 | should be bound. | |
6141 | ||
6142 | Returns the TYPE_DECL for TYPE, which may have been altered by this | |
6143 | processing. */ | |
6144 | ||
6145 | static tree | |
3f3fa556 | 6146 | maybe_process_template_type_declaration (tree type, int is_friend, |
d0ef83bc | 6147 | cp_binding_level *b) |
836495aa | 6148 | { |
6149 | tree decl = TYPE_NAME (type); | |
6150 | ||
6151 | if (processing_template_parmlist) | |
6152 | /* You can't declare a new template type in a template parameter | |
6153 | list. But, you can declare a non-template type: | |
6154 | ||
653e5405 | 6155 | template <class A*> struct S; |
836495aa | 6156 | |
6157 | is a forward-declaration of `A'. */ | |
6158 | ; | |
439abd1d | 6159 | else if (b->kind == sk_namespace |
6160 | && current_binding_level->kind != sk_namespace) | |
6161 | /* If this new type is being injected into a containing scope, | |
6162 | then it's not a template type. */ | |
6163 | ; | |
836495aa | 6164 | else |
6165 | { | |
95397ff9 | 6166 | gcc_assert (MAYBE_CLASS_TYPE_P (type) |
6167 | || TREE_CODE (type) == ENUMERAL_TYPE); | |
836495aa | 6168 | |
6169 | if (processing_template_decl) | |
6170 | { | |
6171 | /* This may change after the call to | |
6172 | push_template_decl_real, but we want the original value. */ | |
6173 | tree name = DECL_NAME (decl); | |
6174 | ||
3f3fa556 | 6175 | decl = push_template_decl_real (decl, is_friend); |
0ea8c695 | 6176 | if (decl == error_mark_node) |
6177 | return error_mark_node; | |
6178 | ||
836495aa | 6179 | /* If the current binding level is the binding level for the |
6180 | template parameters (see the comment in | |
6181 | begin_template_parm_list) and the enclosing level is a class | |
6182 | scope, and we're not looking at a friend, push the | |
6183 | declaration of the member class into the class scope. In the | |
6184 | friend case, push_template_decl will already have put the | |
6185 | friend into global scope, if appropriate. */ | |
6186 | if (TREE_CODE (type) != ENUMERAL_TYPE | |
3f3fa556 | 6187 | && !is_friend && b->kind == sk_template_parms |
836495aa | 6188 | && b->level_chain->kind == sk_class) |
6189 | { | |
6190 | finish_member_declaration (CLASSTYPE_TI_TEMPLATE (type)); | |
fc64a85e | 6191 | |
836495aa | 6192 | if (!COMPLETE_TYPE_P (current_class_type)) |
6193 | { | |
6194 | maybe_add_class_template_decl_list (current_class_type, | |
6195 | type, /*friend_p=*/0); | |
e4bc96e2 | 6196 | /* Put this UTD in the table of UTDs for the class. */ |
fc64a85e | 6197 | if (CLASSTYPE_NESTED_UTDS (current_class_type) == NULL) |
6198 | CLASSTYPE_NESTED_UTDS (current_class_type) = | |
6199 | binding_table_new (SCOPE_DEFAULT_HT_SIZE); | |
6200 | ||
6201 | binding_table_insert | |
6202 | (CLASSTYPE_NESTED_UTDS (current_class_type), name, type); | |
836495aa | 6203 | } |
6204 | } | |
6205 | } | |
6206 | } | |
6207 | ||
6208 | return decl; | |
6209 | } | |
6210 | ||
f4f11c20 | 6211 | /* Push a tag name NAME for struct/class/union/enum type TYPE. In case |
6212 | that the NAME is a class template, the tag is processed but not pushed. | |
6213 | ||
6214 | The pushed scope depend on the SCOPE parameter: | |
6215 | - When SCOPE is TS_CURRENT, put it into the inner-most non-sk_cleanup | |
6216 | scope. | |
6217 | - When SCOPE is TS_GLOBAL, put it in the inner-most non-class and | |
6218 | non-template-parameter scope. This case is needed for forward | |
6219 | declarations. | |
6220 | - When SCOPE is TS_WITHIN_ENCLOSING_NON_CLASS, this is similar to | |
6221 | TS_GLOBAL case except that names within template-parameter scopes | |
6222 | are not pushed at all. | |
6223 | ||
8aedf238 | 6224 | Returns TYPE upon success and ERROR_MARK_NODE otherwise. */ |
836495aa | 6225 | |
6198e8f6 | 6226 | static tree |
d6cc2ec2 | 6227 | do_pushtag (tree name, tree type, tag_scope scope) |
836495aa | 6228 | { |
d7323d26 | 6229 | tree decl; |
836495aa | 6230 | |
d6cc2ec2 | 6231 | cp_binding_level *b = current_binding_level; |
2efe4daf | 6232 | while (/* Cleanup scopes are not scopes from the point of view of |
6233 | the language. */ | |
6234 | b->kind == sk_cleanup | |
34eac767 | 6235 | /* Neither are function parameter scopes. */ |
6236 | || b->kind == sk_function_parms | |
2efe4daf | 6237 | /* Neither are the scopes used to hold template parameters |
6238 | for an explicit specialization. For an ordinary template | |
6239 | declaration, these scopes are not scopes from the point of | |
f4f11c20 | 6240 | view of the language. */ |
6241 | || (b->kind == sk_template_parms | |
6242 | && (b->explicit_spec_p || scope == ts_global)) | |
99661a78 | 6243 | /* Pushing into a class is ok for lambdas or when we want current */ |
836495aa | 6244 | || (b->kind == sk_class |
99661a78 | 6245 | && scope != ts_lambda |
3f3fa556 | 6246 | && (scope != ts_current |
836495aa | 6247 | /* We may be defining a new type in the initializer |
6248 | of a static member variable. We allow this when | |
6249 | not pedantic, and it is particularly useful for | |
6250 | type punning via an anonymous union. */ | |
6251 | || COMPLETE_TYPE_P (b->this_entity)))) | |
6252 | b = b->level_chain; | |
6253 | ||
694683bb | 6254 | gcc_assert (identifier_p (name)); |
074ab442 | 6255 | |
d7323d26 | 6256 | /* Do C++ gratuitous typedefing. */ |
6198e8f6 | 6257 | if (identifier_type_value_1 (name) != type) |
836495aa | 6258 | { |
d7323d26 | 6259 | tree tdef; |
6260 | int in_class = 0; | |
6261 | tree context = TYPE_CONTEXT (type); | |
836495aa | 6262 | |
d7323d26 | 6263 | if (! context) |
6264 | { | |
6265 | tree cs = current_scope (); | |
074ab442 | 6266 | |
a8b75081 | 6267 | if (scope == ts_current |
99661a78 | 6268 | || scope == ts_lambda |
a8b75081 | 6269 | || (cs && TREE_CODE (cs) == FUNCTION_DECL)) |
d7323d26 | 6270 | context = cs; |
99661a78 | 6271 | else if (cs && TYPE_P (cs)) |
d7323d26 | 6272 | /* When declaring a friend class of a local class, we want |
6273 | to inject the newly named class into the scope | |
6274 | containing the local class, not the namespace | |
6275 | scope. */ | |
6276 | context = decl_function_context (get_type_decl (cs)); | |
6277 | } | |
6278 | if (!context) | |
6279 | context = current_namespace; | |
3f3fa556 | 6280 | |
d7323d26 | 6281 | if (b->kind == sk_class |
6282 | || (b->kind == sk_template_parms | |
6283 | && b->level_chain->kind == sk_class)) | |
6284 | in_class = 1; | |
836495aa | 6285 | |
d7323d26 | 6286 | tdef = create_implicit_typedef (name, type); |
6287 | DECL_CONTEXT (tdef) = FROB_CONTEXT (context); | |
6288 | if (scope == ts_within_enclosing_non_class) | |
836495aa | 6289 | { |
d7323d26 | 6290 | /* This is a friend. Make this TYPE_DECL node hidden from |
6291 | ordinary name lookup. Its corresponding TEMPLATE_DECL | |
6292 | will be marked in push_template_decl_real. */ | |
6293 | retrofit_lang_decl (tdef); | |
6294 | DECL_ANTICIPATED (tdef) = 1; | |
6295 | DECL_FRIEND_P (tdef) = 1; | |
6296 | } | |
fc64a85e | 6297 | |
d7323d26 | 6298 | decl = maybe_process_template_type_declaration |
6299 | (type, scope == ts_within_enclosing_non_class, b); | |
6300 | if (decl == error_mark_node) | |
6198e8f6 | 6301 | return decl; |
074ab442 | 6302 | |
d7323d26 | 6303 | if (b->kind == sk_class) |
6304 | { | |
99661a78 | 6305 | if (!TYPE_BEING_DEFINED (current_class_type) |
6306 | && scope != ts_lambda) | |
6198e8f6 | 6307 | return error_mark_node; |
c64e181a | 6308 | |
d7323d26 | 6309 | if (!PROCESSING_REAL_TEMPLATE_DECL_P ()) |
6310 | /* Put this TYPE_DECL on the TYPE_FIELDS list for the | |
6311 | class. But if it's a member template class, we want | |
6312 | the TEMPLATE_DECL, not the TYPE_DECL, so this is done | |
6313 | later. */ | |
6314 | finish_member_declaration (decl); | |
6315 | else | |
6316 | pushdecl_class_level (decl); | |
836495aa | 6317 | } |
d7323d26 | 6318 | else if (b->kind != sk_template_parms) |
e0679c13 | 6319 | { |
d6cc2ec2 | 6320 | decl = do_pushdecl_with_scope (decl, b, /*is_friend=*/false); |
e0679c13 | 6321 | if (decl == error_mark_node) |
6198e8f6 | 6322 | return decl; |
67dd55bd | 6323 | |
6324 | if (DECL_CONTEXT (decl) == std_node | |
c99e91fe | 6325 | && init_list_identifier == DECL_NAME (TYPE_NAME (type)) |
67dd55bd | 6326 | && !CLASSTYPE_TEMPLATE_INFO (type)) |
6327 | { | |
6328 | error ("declaration of std::initializer_list does not match " | |
6329 | "#include <initializer_list>, isn't a template"); | |
6330 | return error_mark_node; | |
6331 | } | |
e0679c13 | 6332 | } |
d7323d26 | 6333 | |
1d3e301c | 6334 | if (! in_class) |
6335 | set_identifier_type_value_with_scope (name, tdef, b); | |
6336 | ||
d7323d26 | 6337 | TYPE_CONTEXT (type) = DECL_CONTEXT (decl); |
6338 | ||
6339 | /* If this is a local class, keep track of it. We need this | |
6340 | information for name-mangling, and so that it is possible to | |
6341 | find all function definitions in a translation unit in a | |
6342 | convenient way. (It's otherwise tricky to find a member | |
6343 | function definition it's only pointed to from within a local | |
6344 | class.) */ | |
398c50e2 | 6345 | if (TYPE_FUNCTION_SCOPE_P (type)) |
c9e4cdb5 | 6346 | { |
6347 | if (processing_template_decl) | |
6348 | { | |
6349 | /* Push a DECL_EXPR so we call pushtag at the right time in | |
6350 | template instantiation rather than in some nested context. */ | |
6351 | add_decl_expr (decl); | |
6352 | } | |
6353 | else | |
f1f41a6c | 6354 | vec_safe_push (local_classes, type); |
c9e4cdb5 | 6355 | } |
836495aa | 6356 | } |
99661a78 | 6357 | |
d7323d26 | 6358 | if (b->kind == sk_class |
6359 | && !COMPLETE_TYPE_P (current_class_type)) | |
836495aa | 6360 | { |
d7323d26 | 6361 | maybe_add_class_template_decl_list (current_class_type, |
6362 | type, /*friend_p=*/0); | |
074ab442 | 6363 | |
d7323d26 | 6364 | if (CLASSTYPE_NESTED_UTDS (current_class_type) == NULL) |
6365 | CLASSTYPE_NESTED_UTDS (current_class_type) | |
6366 | = binding_table_new (SCOPE_DEFAULT_HT_SIZE); | |
074ab442 | 6367 | |
d7323d26 | 6368 | binding_table_insert |
6369 | (CLASSTYPE_NESTED_UTDS (current_class_type), name, type); | |
836495aa | 6370 | } |
d7323d26 | 6371 | |
6372 | decl = TYPE_NAME (type); | |
6373 | gcc_assert (TREE_CODE (decl) == TYPE_DECL); | |
d7323d26 | 6374 | |
4a2849cb | 6375 | /* Set type visibility now if this is a forward declaration. */ |
6376 | TREE_PUBLIC (decl) = 1; | |
6377 | determine_visibility (decl); | |
6378 | ||
6198e8f6 | 6379 | return type; |
6380 | } | |
6381 | ||
d6cc2ec2 | 6382 | /* Wrapper for do_pushtag. */ |
6198e8f6 | 6383 | |
6384 | tree | |
6385 | pushtag (tree name, tree type, tag_scope scope) | |
6386 | { | |
6387 | tree ret; | |
6388 | bool subtime = timevar_cond_start (TV_NAME_LOOKUP); | |
d6cc2ec2 | 6389 | ret = do_pushtag (name, type, scope); |
6198e8f6 | 6390 | timevar_cond_stop (TV_NAME_LOOKUP, subtime); |
6391 | return ret; | |
836495aa | 6392 | } |
37af486a | 6393 | |
836495aa | 6394 | \f |
836495aa | 6395 | /* Subroutines for reverting temporarily to top-level for instantiation |
6396 | of templates and such. We actually need to clear out the class- and | |
6397 | local-value slots of all identifiers, so that only the global values | |
6398 | are at all visible. Simply setting current_binding_level to the global | |
6399 | scope isn't enough, because more binding levels may be pushed. */ | |
6400 | struct saved_scope *scope_chain; | |
6401 | ||
74c9bbb8 | 6402 | /* Return true if ID has not already been marked. */ |
6403 | ||
6404 | static inline bool | |
6405 | store_binding_p (tree id) | |
6406 | { | |
6407 | if (!id || !IDENTIFIER_BINDING (id)) | |
6408 | return false; | |
6409 | ||
6410 | if (IDENTIFIER_MARKED (id)) | |
6411 | return false; | |
6412 | ||
6413 | return true; | |
6414 | } | |
6415 | ||
6416 | /* Add an appropriate binding to *OLD_BINDINGS which needs to already | |
6417 | have enough space reserved. */ | |
598057ec | 6418 | |
93c149df | 6419 | static void |
f1f41a6c | 6420 | store_binding (tree id, vec<cxx_saved_binding, va_gc> **old_bindings) |
598057ec | 6421 | { |
e82e4eb5 | 6422 | cxx_saved_binding saved; |
598057ec | 6423 | |
74c9bbb8 | 6424 | gcc_checking_assert (store_binding_p (id)); |
9031d10b | 6425 | |
93c149df | 6426 | IDENTIFIER_MARKED (id) = 1; |
598057ec | 6427 | |
e82e4eb5 | 6428 | saved.identifier = id; |
6429 | saved.binding = IDENTIFIER_BINDING (id); | |
6430 | saved.real_type_value = REAL_IDENTIFIER_TYPE_VALUE (id); | |
f1f41a6c | 6431 | (*old_bindings)->quick_push (saved); |
598057ec | 6432 | IDENTIFIER_BINDING (id) = NULL; |
598057ec | 6433 | } |
6434 | ||
93c149df | 6435 | static void |
f1f41a6c | 6436 | store_bindings (tree names, vec<cxx_saved_binding, va_gc> **old_bindings) |
836495aa | 6437 | { |
ce7bcd95 | 6438 | static vec<tree> bindings_need_stored; |
74c9bbb8 | 6439 | tree t, id; |
6440 | size_t i; | |
836495aa | 6441 | |
6198e8f6 | 6442 | bool subtime = timevar_cond_start (TV_NAME_LOOKUP); |
836495aa | 6443 | for (t = names; t; t = TREE_CHAIN (t)) |
6444 | { | |
836495aa | 6445 | if (TREE_CODE (t) == TREE_LIST) |
6446 | id = TREE_PURPOSE (t); | |
6447 | else | |
6448 | id = DECL_NAME (t); | |
6449 | ||
74c9bbb8 | 6450 | if (store_binding_p (id)) |
f1f41a6c | 6451 | bindings_need_stored.safe_push (id); |
74c9bbb8 | 6452 | } |
f1f41a6c | 6453 | if (!bindings_need_stored.is_empty ()) |
74c9bbb8 | 6454 | { |
f1f41a6c | 6455 | vec_safe_reserve_exact (*old_bindings, bindings_need_stored.length ()); |
6456 | for (i = 0; bindings_need_stored.iterate (i, &id); ++i) | |
74c9bbb8 | 6457 | { |
2fbe7a32 | 6458 | /* We can apparently have duplicates in NAMES. */ |
74c9bbb8 | 6459 | if (store_binding_p (id)) |
6460 | store_binding (id, old_bindings); | |
6461 | } | |
f1f41a6c | 6462 | bindings_need_stored.truncate (0); |
836495aa | 6463 | } |
6198e8f6 | 6464 | timevar_cond_stop (TV_NAME_LOOKUP, subtime); |
836495aa | 6465 | } |
6466 | ||
598057ec | 6467 | /* Like store_bindings, but NAMES is a vector of cp_class_binding |
6468 | objects, rather than a TREE_LIST. */ | |
6469 | ||
93c149df | 6470 | static void |
f1f41a6c | 6471 | store_class_bindings (vec<cp_class_binding, va_gc> *names, |
6472 | vec<cxx_saved_binding, va_gc> **old_bindings) | |
598057ec | 6473 | { |
ce7bcd95 | 6474 | static vec<tree> bindings_need_stored; |
598057ec | 6475 | size_t i; |
6476 | cp_class_binding *cb; | |
598057ec | 6477 | |
f1f41a6c | 6478 | for (i = 0; vec_safe_iterate (names, i, &cb); ++i) |
74c9bbb8 | 6479 | if (store_binding_p (cb->identifier)) |
f1f41a6c | 6480 | bindings_need_stored.safe_push (cb->identifier); |
6481 | if (!bindings_need_stored.is_empty ()) | |
74c9bbb8 | 6482 | { |
6483 | tree id; | |
f1f41a6c | 6484 | vec_safe_reserve_exact (*old_bindings, bindings_need_stored.length ()); |
6485 | for (i = 0; bindings_need_stored.iterate (i, &id); ++i) | |
74c9bbb8 | 6486 | store_binding (id, old_bindings); |
f1f41a6c | 6487 | bindings_need_stored.truncate (0); |
74c9bbb8 | 6488 | } |
598057ec | 6489 | } |
6490 | ||
bed39615 | 6491 | /* A chain of saved_scope structures awaiting reuse. */ |
6492 | ||
6493 | static GTY((deletable)) struct saved_scope *free_saved_scope; | |
6494 | ||
5872305e | 6495 | static void |
6496 | do_push_to_top_level (void) | |
836495aa | 6497 | { |
6498 | struct saved_scope *s; | |
d0ef83bc | 6499 | cp_binding_level *b; |
93c149df | 6500 | cxx_saved_binding *sb; |
6501 | size_t i; | |
855ed7a1 | 6502 | bool need_pop; |
836495aa | 6503 | |
bed39615 | 6504 | /* Reuse or create a new structure for this saved scope. */ |
6505 | if (free_saved_scope != NULL) | |
6506 | { | |
6507 | s = free_saved_scope; | |
6508 | free_saved_scope = s->prev; | |
6509 | ||
6510 | vec<cxx_saved_binding, va_gc> *old_bindings = s->old_bindings; | |
6511 | memset (s, 0, sizeof (*s)); | |
6512 | /* Also reuse the structure's old_bindings vector. */ | |
6513 | vec_safe_truncate (old_bindings, 0); | |
6514 | s->old_bindings = old_bindings; | |
6515 | } | |
6516 | else | |
6517 | s = ggc_cleared_alloc<saved_scope> (); | |
836495aa | 6518 | |
6519 | b = scope_chain ? current_binding_level : 0; | |
6520 | ||
6521 | /* If we're in the middle of some function, save our state. */ | |
6522 | if (cfun) | |
6523 | { | |
855ed7a1 | 6524 | need_pop = true; |
d2764e2d | 6525 | push_function_context (); |
836495aa | 6526 | } |
6527 | else | |
855ed7a1 | 6528 | need_pop = false; |
836495aa | 6529 | |
598057ec | 6530 | if (scope_chain && previous_class_level) |
93c149df | 6531 | store_class_bindings (previous_class_level->class_shadowed, |
6532 | &s->old_bindings); | |
836495aa | 6533 | |
6534 | /* Have to include the global scope, because class-scope decls | |
6535 | aren't listed anywhere useful. */ | |
6536 | for (; b; b = b->level_chain) | |
6537 | { | |
6538 | tree t; | |
6539 | ||
6540 | /* Template IDs are inserted into the global level. If they were | |
6541 | inserted into namespace level, finish_file wouldn't find them | |
6542 | when doing pending instantiations. Therefore, don't stop at | |
6543 | namespace level, but continue until :: . */ | |
7f233616 | 6544 | if (global_scope_p (b)) |
836495aa | 6545 | break; |
6546 | ||
93c149df | 6547 | store_bindings (b->names, &s->old_bindings); |
836495aa | 6548 | /* We also need to check class_shadowed to save class-level type |
6549 | bindings, since pushclass doesn't fill in b->names. */ | |
6550 | if (b->kind == sk_class) | |
93c149df | 6551 | store_class_bindings (b->class_shadowed, &s->old_bindings); |
836495aa | 6552 | |
6553 | /* Unwind type-value slots back to top level. */ | |
6554 | for (t = b->type_shadowed; t; t = TREE_CHAIN (t)) | |
6555 | SET_IDENTIFIER_TYPE_VALUE (TREE_PURPOSE (t), TREE_VALUE (t)); | |
6556 | } | |
93c149df | 6557 | |
f1f41a6c | 6558 | FOR_EACH_VEC_SAFE_ELT (s->old_bindings, i, sb) |
93c149df | 6559 | IDENTIFIER_MARKED (sb->identifier) = 0; |
6560 | ||
836495aa | 6561 | s->prev = scope_chain; |
836495aa | 6562 | s->bindings = b; |
6563 | s->need_pop_function_context = need_pop; | |
6564 | s->function_decl = current_function_decl; | |
48d94ede | 6565 | s->unevaluated_operand = cp_unevaluated_operand; |
6566 | s->inhibit_evaluation_warnings = c_inhibit_evaluation_warnings; | |
61e987fc | 6567 | s->x_stmt_tree.stmts_are_full_exprs_p = true; |
836495aa | 6568 | |
6569 | scope_chain = s; | |
6570 | current_function_decl = NULL_TREE; | |
f1f41a6c | 6571 | vec_alloc (current_lang_base, 10); |
836495aa | 6572 | current_lang_name = lang_name_cplusplus; |
6573 | current_namespace = global_namespace; | |
637441cf | 6574 | push_class_stack (); |
48d94ede | 6575 | cp_unevaluated_operand = 0; |
6576 | c_inhibit_evaluation_warnings = 0; | |
836495aa | 6577 | } |
6578 | ||
6198e8f6 | 6579 | static void |
5872305e | 6580 | do_pop_from_top_level (void) |
836495aa | 6581 | { |
6582 | struct saved_scope *s = scope_chain; | |
6583 | cxx_saved_binding *saved; | |
93c149df | 6584 | size_t i; |
836495aa | 6585 | |
836495aa | 6586 | /* Clear out class-level bindings cache. */ |
598057ec | 6587 | if (previous_class_level) |
836495aa | 6588 | invalidate_class_lookup_cache (); |
637441cf | 6589 | pop_class_stack (); |
836495aa | 6590 | |
6591 | current_lang_base = 0; | |
6592 | ||
6593 | scope_chain = s->prev; | |
f1f41a6c | 6594 | FOR_EACH_VEC_SAFE_ELT (s->old_bindings, i, saved) |
836495aa | 6595 | { |
6596 | tree id = saved->identifier; | |
6597 | ||
6598 | IDENTIFIER_BINDING (id) = saved->binding; | |
836495aa | 6599 | SET_IDENTIFIER_TYPE_VALUE (id, saved->real_type_value); |
6600 | } | |
6601 | ||
6602 | /* If we were in the middle of compiling a function, restore our | |
6603 | state. */ | |
6604 | if (s->need_pop_function_context) | |
d2764e2d | 6605 | pop_function_context (); |
836495aa | 6606 | current_function_decl = s->function_decl; |
48d94ede | 6607 | cp_unevaluated_operand = s->unevaluated_operand; |
6608 | c_inhibit_evaluation_warnings = s->inhibit_evaluation_warnings; | |
bed39615 | 6609 | |
6610 | /* Make this saved_scope structure available for reuse by | |
6611 | push_to_top_level. */ | |
6612 | s->prev = free_saved_scope; | |
6613 | free_saved_scope = s; | |
836495aa | 6614 | } |
6615 | ||
5872305e | 6616 | /* Push into the scope of the namespace NS, even if it is deeply |
6617 | nested within another namespace. */ | |
6198e8f6 | 6618 | |
5872305e | 6619 | static void |
6620 | do_push_nested_namespace (tree ns) | |
6621 | { | |
6622 | if (ns == global_namespace) | |
6623 | do_push_to_top_level (); | |
6624 | else | |
6625 | { | |
6626 | do_push_nested_namespace (CP_DECL_CONTEXT (ns)); | |
6627 | gcc_checking_assert | |
17d66324 | 6628 | (find_namespace_value (current_namespace, |
6629 | DECL_NAME (ns) ? DECL_NAME (ns) | |
6630 | : anon_identifier) == ns); | |
5872305e | 6631 | resume_scope (NAMESPACE_LEVEL (ns)); |
6632 | current_namespace = ns; | |
6633 | } | |
6634 | } | |
6635 | ||
6636 | /* Pop back from the scope of the namespace NS, which was previously | |
6637 | entered with push_nested_namespace. */ | |
6638 | ||
6639 | static void | |
6640 | do_pop_nested_namespace (tree ns) | |
6641 | { | |
6642 | while (ns != global_namespace) | |
6643 | { | |
6644 | ns = CP_DECL_CONTEXT (ns); | |
6645 | current_namespace = ns; | |
6646 | leave_scope (); | |
6647 | } | |
6648 | ||
6649 | do_pop_from_top_level (); | |
6650 | } | |
6651 | ||
475205a0 | 6652 | /* Add TARGET to USINGS, if it does not already exist there. |
6653 | We used to build the complete graph of usings at this point, from | |
6654 | the POV of the source namespaces. Now we build that as we perform | |
6655 | the unqualified search. */ | |
3a591284 | 6656 | |
6657 | static void | |
0a2455c5 | 6658 | add_using_namespace (vec<tree, va_gc> *&usings, tree target) |
3a591284 | 6659 | { |
0a2455c5 | 6660 | if (usings) |
6661 | for (unsigned ix = usings->length (); ix--;) | |
6662 | if ((*usings)[ix] == target) | |
6663 | return; | |
3a591284 | 6664 | |
0a2455c5 | 6665 | vec_safe_push (usings, target); |
3a591284 | 6666 | } |
6667 | ||
475205a0 | 6668 | /* Tell the debug system of a using directive. */ |
3a591284 | 6669 | |
6670 | static void | |
41d01e67 | 6671 | emit_debug_info_using_namespace (tree from, tree target, bool implicit) |
3a591284 | 6672 | { |
475205a0 | 6673 | /* Emit debugging info. */ |
6674 | tree context = from != global_namespace ? from : NULL_TREE; | |
41d01e67 | 6675 | debug_hooks->imported_module_or_decl (target, NULL_TREE, context, false, |
6676 | implicit); | |
3a591284 | 6677 | } |
6678 | ||
6679 | /* Process a namespace-scope using directive. */ | |
6680 | ||
6681 | void | |
6682 | finish_namespace_using_directive (tree target, tree attribs) | |
6683 | { | |
6684 | gcc_checking_assert (namespace_bindings_p ()); | |
6685 | if (target == error_mark_node) | |
6686 | return; | |
6687 | ||
475205a0 | 6688 | add_using_namespace (DECL_NAMESPACE_USING (current_namespace), |
3a591284 | 6689 | ORIGINAL_NAMESPACE (target)); |
475205a0 | 6690 | emit_debug_info_using_namespace (current_namespace, |
41d01e67 | 6691 | ORIGINAL_NAMESPACE (target), false); |
3a591284 | 6692 | |
6693 | if (attribs == error_mark_node) | |
6694 | return; | |
6695 | ||
6696 | for (tree a = attribs; a; a = TREE_CHAIN (a)) | |
6697 | { | |
6698 | tree name = get_attribute_name (a); | |
6699 | if (is_attribute_p ("strong", name)) | |
6700 | { | |
6701 | warning (0, "strong using directive no longer supported"); | |
6702 | if (CP_DECL_CONTEXT (target) == current_namespace) | |
6703 | inform (DECL_SOURCE_LOCATION (target), | |
6704 | "you may use an inline namespace instead"); | |
6705 | } | |
6706 | else | |
6707 | warning (OPT_Wattributes, "%qD attribute directive ignored", name); | |
6708 | } | |
6709 | } | |
6710 | ||
6711 | /* Process a function-scope using-directive. */ | |
6712 | ||
6713 | void | |
6714 | finish_local_using_directive (tree target, tree attribs) | |
6715 | { | |
6716 | gcc_checking_assert (local_bindings_p ()); | |
6717 | if (target == error_mark_node) | |
6718 | return; | |
6719 | ||
6720 | if (attribs) | |
6721 | warning (OPT_Wattributes, "attributes ignored on local using directive"); | |
6722 | ||
6723 | add_stmt (build_stmt (input_location, USING_STMT, target)); | |
6724 | ||
475205a0 | 6725 | add_using_namespace (current_binding_level->using_directives, |
6726 | ORIGINAL_NAMESPACE (target)); | |
3a591284 | 6727 | } |
6728 | ||
5872305e | 6729 | /* Pushes X into the global namespace. */ |
6730 | ||
6731 | tree | |
6732 | pushdecl_top_level (tree x, bool is_friend) | |
6198e8f6 | 6733 | { |
6734 | bool subtime = timevar_cond_start (TV_NAME_LOOKUP); | |
5872305e | 6735 | do_push_to_top_level (); |
6736 | x = pushdecl_namespace_level (x, is_friend); | |
6737 | do_pop_from_top_level (); | |
6198e8f6 | 6738 | timevar_cond_stop (TV_NAME_LOOKUP, subtime); |
5872305e | 6739 | return x; |
6740 | } | |
6741 | ||
6742 | /* Pushes X into the global namespace and calls cp_finish_decl to | |
6743 | register the variable, initializing it with INIT. */ | |
6744 | ||
6745 | tree | |
6746 | pushdecl_top_level_and_finish (tree x, tree init) | |
6747 | { | |
6748 | bool subtime = timevar_cond_start (TV_NAME_LOOKUP); | |
6749 | do_push_to_top_level (); | |
6750 | x = pushdecl_namespace_level (x, false); | |
6751 | cp_finish_decl (x, init, false, NULL_TREE, 0); | |
6752 | do_pop_from_top_level (); | |
6753 | timevar_cond_stop (TV_NAME_LOOKUP, subtime); | |
6754 | return x; | |
6198e8f6 | 6755 | } |
6756 | ||
2e33510a | 6757 | /* Enter the namespaces from current_namerspace to NS. */ |
6758 | ||
6759 | static int | |
6760 | push_inline_namespaces (tree ns) | |
6761 | { | |
6762 | int count = 0; | |
6763 | if (ns != current_namespace) | |
6764 | { | |
6765 | gcc_assert (ns != global_namespace); | |
6766 | count += push_inline_namespaces (CP_DECL_CONTEXT (ns)); | |
6767 | resume_scope (NAMESPACE_LEVEL (ns)); | |
6768 | current_namespace = ns; | |
6769 | count++; | |
6770 | } | |
6771 | return count; | |
6772 | } | |
6773 | ||
b8604e18 | 6774 | /* Push into the scope of the NAME namespace. If NAME is NULL_TREE, |
6775 | then we enter an anonymous namespace. If MAKE_INLINE is true, then | |
6776 | we create an inline namespace (it is up to the caller to check upon | |
6777 | redefinition). Return the number of namespaces entered. */ | |
4fd9bd13 | 6778 | |
b8604e18 | 6779 | int |
6780 | push_namespace (tree name, bool make_inline) | |
4fd9bd13 | 6781 | { |
4fd9bd13 | 6782 | bool subtime = timevar_cond_start (TV_NAME_LOOKUP); |
b8604e18 | 6783 | int count = 0; |
4fd9bd13 | 6784 | |
6785 | /* We should not get here if the global_namespace is not yet constructed | |
6786 | nor if NAME designates the global namespace: The global scope is | |
6787 | constructed elsewhere. */ | |
c99e91fe | 6788 | gcc_assert (global_namespace != NULL && name != global_identifier); |
4fd9bd13 | 6789 | |
b8604e18 | 6790 | if (!name) |
6791 | name = anon_identifier; | |
6792 | ||
2e33510a | 6793 | tree ns = NULL_TREE; |
6794 | { | |
6795 | name_lookup lookup (name, 0); | |
6796 | if (!lookup.search_qualified (current_namespace, /*usings=*/false)) | |
6797 | ; | |
6798 | else if (TREE_CODE (lookup.value) != NAMESPACE_DECL) | |
6799 | ; | |
6800 | else if (tree dna = DECL_NAMESPACE_ALIAS (lookup.value)) | |
6801 | { | |
6802 | /* A namespace alias is not allowed here, but if the alias | |
6803 | is for a namespace also inside the current scope, | |
6804 | accept it with a diagnostic. That's better than dying | |
6805 | horribly. */ | |
6806 | if (is_nested_namespace (current_namespace, CP_DECL_CONTEXT (dna))) | |
6807 | { | |
6808 | error ("namespace alias %qD not allowed here, " | |
6809 | "assuming %qD", lookup.value, dna); | |
6810 | ns = dna; | |
6811 | } | |
6812 | } | |
6813 | else | |
6814 | ns = lookup.value; | |
6815 | } | |
4fd9bd13 | 6816 | |
b8604e18 | 6817 | bool new_ns = false; |
2e33510a | 6818 | if (ns) |
6819 | /* DR2061. NS might be a member of an inline namespace. We | |
6820 | need to push into those namespaces. */ | |
6821 | count += push_inline_namespaces (CP_DECL_CONTEXT (ns)); | |
6822 | else | |
4fd9bd13 | 6823 | { |
b8604e18 | 6824 | ns = build_lang_decl (NAMESPACE_DECL, name, void_type_node); |
ccb7f6c9 | 6825 | SCOPE_DEPTH (ns) = SCOPE_DEPTH (current_namespace) + 1; |
6826 | if (!SCOPE_DEPTH (ns)) | |
6827 | /* We only allow depth 255. */ | |
6828 | sorry ("cannot nest more than %d namespaces", | |
6829 | SCOPE_DEPTH (current_namespace)); | |
b8604e18 | 6830 | DECL_CONTEXT (ns) = FROB_CONTEXT (current_namespace); |
6831 | new_ns = true; | |
6832 | ||
6833 | if (pushdecl (ns) == error_mark_node) | |
6834 | ns = NULL_TREE; | |
4fd9bd13 | 6835 | else |
4fd9bd13 | 6836 | { |
b8604e18 | 6837 | if (name == anon_identifier) |
6838 | { | |
6839 | /* Clear DECL_NAME for the benefit of debugging back ends. */ | |
6840 | SET_DECL_ASSEMBLER_NAME (ns, name); | |
6841 | DECL_NAME (ns) = NULL_TREE; | |
6842 | ||
6843 | if (!make_inline) | |
475205a0 | 6844 | add_using_namespace (DECL_NAMESPACE_USING (current_namespace), |
6845 | ns); | |
b8604e18 | 6846 | } |
6847 | else if (TREE_PUBLIC (current_namespace)) | |
6848 | TREE_PUBLIC (ns) = 1; | |
6849 | ||
6850 | if (make_inline) | |
0a2455c5 | 6851 | { |
6852 | DECL_NAMESPACE_INLINE_P (ns) = true; | |
6853 | vec_safe_push (DECL_NAMESPACE_INLINEES (current_namespace), ns); | |
6854 | } | |
41d01e67 | 6855 | |
6856 | if (name == anon_identifier || make_inline) | |
6857 | emit_debug_info_using_namespace (current_namespace, ns, true); | |
4fd9bd13 | 6858 | } |
b8604e18 | 6859 | } |
6860 | ||
6861 | if (ns) | |
6862 | { | |
6863 | if (make_inline && !DECL_NAMESPACE_INLINE_P (ns)) | |
4fd9bd13 | 6864 | { |
b8604e18 | 6865 | error ("inline namespace must be specified at initial definition"); |
6866 | inform (DECL_SOURCE_LOCATION (ns), "%qD defined here", ns); | |
4fd9bd13 | 6867 | } |
b8604e18 | 6868 | if (new_ns) |
6869 | begin_scope (sk_namespace, ns); | |
6870 | else | |
6871 | resume_scope (NAMESPACE_LEVEL (ns)); | |
6872 | current_namespace = ns; | |
6873 | count++; | |
4fd9bd13 | 6874 | } |
4fd9bd13 | 6875 | |
6876 | timevar_cond_stop (TV_NAME_LOOKUP, subtime); | |
b8604e18 | 6877 | return count; |
4fd9bd13 | 6878 | } |
6879 | ||
6880 | /* Pop from the scope of the current namespace. */ | |
6881 | ||
6882 | void | |
6883 | pop_namespace (void) | |
6884 | { | |
0a2455c5 | 6885 | bool subtime = timevar_cond_start (TV_NAME_LOOKUP); |
6886 | ||
4fd9bd13 | 6887 | gcc_assert (current_namespace != global_namespace); |
6888 | current_namespace = CP_DECL_CONTEXT (current_namespace); | |
6889 | /* The binding level is not popped, as it might be re-opened later. */ | |
6890 | leave_scope (); | |
0a2455c5 | 6891 | |
6892 | timevar_cond_stop (TV_NAME_LOOKUP, subtime); | |
4fd9bd13 | 6893 | } |
6894 | ||
5872305e | 6895 | /* External entry points for do_{push_to/pop_from}_top_level. */ |
4fd9bd13 | 6896 | |
6897 | void | |
5872305e | 6898 | push_to_top_level (void) |
4fd9bd13 | 6899 | { |
5872305e | 6900 | bool subtime = timevar_cond_start (TV_NAME_LOOKUP); |
6901 | do_push_to_top_level (); | |
6902 | timevar_cond_stop (TV_NAME_LOOKUP, subtime); | |
4fd9bd13 | 6903 | } |
6904 | ||
5872305e | 6905 | void |
6906 | pop_from_top_level (void) | |
6907 | { | |
6908 | bool subtime = timevar_cond_start (TV_NAME_LOOKUP); | |
6909 | do_pop_from_top_level (); | |
6910 | timevar_cond_stop (TV_NAME_LOOKUP, subtime); | |
6911 | } | |
6912 | ||
6913 | /* External entry points for do_{push,pop}_nested_namespace. */ | |
6914 | ||
6915 | void | |
6916 | push_nested_namespace (tree ns) | |
6917 | { | |
6918 | bool subtime = timevar_cond_start (TV_NAME_LOOKUP); | |
6919 | do_push_nested_namespace (ns); | |
6920 | timevar_cond_stop (TV_NAME_LOOKUP, subtime); | |
6921 | } | |
4fd9bd13 | 6922 | |
6923 | void | |
6924 | pop_nested_namespace (tree ns) | |
6925 | { | |
6926 | bool subtime = timevar_cond_start (TV_NAME_LOOKUP); | |
6927 | gcc_assert (current_namespace == ns); | |
5872305e | 6928 | do_pop_nested_namespace (ns); |
4fd9bd13 | 6929 | timevar_cond_stop (TV_NAME_LOOKUP, subtime); |
6930 | } | |
6198e8f6 | 6931 | |
836495aa | 6932 | /* Pop off extraneous binding levels left over due to syntax errors. |
836495aa | 6933 | We don't pop past namespaces, as they might be valid. */ |
6934 | ||
6935 | void | |
6936 | pop_everything (void) | |
6937 | { | |
6938 | if (ENABLE_SCOPE_CHECKING) | |
6939 | verbatim ("XXX entering pop_everything ()\n"); | |
a3145045 | 6940 | while (!namespace_bindings_p ()) |
836495aa | 6941 | { |
6942 | if (current_binding_level->kind == sk_class) | |
6943 | pop_nested_class (); | |
6944 | else | |
6945 | poplevel (0, 0, 0); | |
6946 | } | |
6947 | if (ENABLE_SCOPE_CHECKING) | |
6948 | verbatim ("XXX leaving pop_everything ()\n"); | |
6949 | } | |
6950 | ||
2b49746a | 6951 | /* Emit debugging information for using declarations and directives. |
9031d10b | 6952 | If input tree is overloaded fn then emit debug info for all |
2b49746a | 6953 | candidates. */ |
6954 | ||
094fb0d8 | 6955 | void |
2b49746a | 6956 | cp_emit_debug_info_for_using (tree t, tree context) |
6957 | { | |
05b01572 | 6958 | /* Don't try to emit any debug information if we have errors. */ |
852f689e | 6959 | if (seen_error ()) |
05b01572 | 6960 | return; |
6961 | ||
9031d10b | 6962 | /* Ignore this FUNCTION_DECL if it refers to a builtin declaration |
2b49746a | 6963 | of a builtin function. */ |
9031d10b | 6964 | if (TREE_CODE (t) == FUNCTION_DECL |
2b49746a | 6965 | && DECL_EXTERNAL (t) |
6966 | && DECL_BUILT_IN (t)) | |
6967 | return; | |
6968 | ||
6969 | /* Do not supply context to imported_module_or_decl, if | |
6970 | it is a global namespace. */ | |
6971 | if (context == global_namespace) | |
6972 | context = NULL_TREE; | |
9031d10b | 6973 | |
a5aae789 | 6974 | t = MAYBE_BASELINK_FUNCTIONS (t); |
9031d10b | 6975 | |
2b49746a | 6976 | /* FIXME: Handle TEMPLATE_DECLs. */ |
5637ac62 | 6977 | for (lkp_iterator iter (t); iter; ++iter) |
6978 | { | |
6979 | tree fn = *iter; | |
6980 | if (TREE_CODE (fn) != TEMPLATE_DECL) | |
6981 | { | |
6982 | if (building_stmt_list_p ()) | |
6983 | add_stmt (build_stmt (input_location, USING_STMT, fn)); | |
6984 | else | |
41d01e67 | 6985 | debug_hooks->imported_module_or_decl (fn, NULL_TREE, context, |
6986 | false, false); | |
5637ac62 | 6987 | } |
6988 | } | |
094fb0d8 | 6989 | } |
2b49746a | 6990 | |
db90b1e5 | 6991 | #include "gt-cp-name-lookup.h" |