1 /* Process declarations and variables for C++ compiler.
2 Copyright (C) 1988, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000,
3 2001, 2002, 2003, 2004, 2005, 2006 Free Software Foundation, Inc.
4 Contributed by Michael Tiemann (tiemann@cygnus.com)
6 This file is part of GCC.
8 GCC is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2, or (at your option)
13 GCC is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with GCC; see the file COPYING. If not, write to
20 the Free Software Foundation, 51 Franklin Street, Fifth Floor,
21 Boston, MA 02110-1301, USA. */
24 /* Process declarations and symbol lookup for C++ front end.
25 Also constructs types; the standard scalar types at initialization,
26 and structure, union, array and enum types when they are declared. */
28 /* ??? not all decl nodes are given the most useful possible
29 line numbers. For example, the CONST_DECLs for enum values. */
33 #include "coretypes.h"
40 #include "tree-inline.h"
50 #include "diagnostic.h"
53 #include "tree-flow.h"
55 static tree grokparms (cp_parameter_declarator *, tree *);
56 static const char *redeclaration_error_message (tree, tree);
58 static int decl_jump_unsafe (tree);
59 static void require_complete_types_for_parms (tree);
60 static int ambi_op_p (enum tree_code);
61 static int unary_op_p (enum tree_code);
62 static void push_local_name (tree);
63 static tree grok_reference_init (tree, tree, tree, tree *);
64 static tree grokvardecl (tree, tree, const cp_decl_specifier_seq *,
66 static void record_unknown_type (tree, const char *);
67 static tree builtin_function_1 (const char *, tree, tree,
68 enum built_in_function code,
69 enum built_in_class cl, const char *,
71 static tree build_library_fn_1 (tree, enum tree_code, tree);
72 static int member_function_or_else (tree, tree, enum overload_flags);
73 static void bad_specifiers (tree, const char *, int, int, int, int,
75 static void check_for_uninitialized_const_var (tree);
76 static hashval_t typename_hash (const void *);
77 static int typename_compare (const void *, const void *);
78 static tree local_variable_p_walkfn (tree *, int *, void *);
79 static tree record_builtin_java_type (const char *, int);
80 static const char *tag_name (enum tag_types);
81 static tree lookup_and_check_tag (enum tag_types, tree, tag_scope, bool);
82 static int walk_namespaces_r (tree, walk_namespaces_fn, void *);
83 static void maybe_deduce_size_from_array_init (tree, tree);
84 static void layout_var_decl (tree);
85 static void maybe_commonize_var (tree);
86 static tree check_initializer (tree, tree, int, tree *);
87 static void make_rtl_for_nonlocal_decl (tree, tree, const char *);
88 static void save_function_data (tree);
89 static void check_function_type (tree, tree);
90 static void finish_constructor_body (void);
91 static void begin_destructor_body (void);
92 static void finish_destructor_body (void);
93 static tree create_array_type_for_decl (tree, tree, tree);
94 static tree get_atexit_node (void);
95 static tree get_dso_handle_node (void);
96 static tree start_cleanup_fn (void);
97 static void end_cleanup_fn (void);
98 static tree cp_make_fname_decl (tree, int);
99 static void initialize_predefined_identifiers (void);
100 static tree check_special_function_return_type
101 (special_function_kind, tree, tree);
102 static tree push_cp_library_fn (enum tree_code, tree);
103 static tree build_cp_library_fn (tree, enum tree_code, tree);
104 static void store_parm_decls (tree);
105 static void initialize_local_var (tree, tree);
106 static void expand_static_init (tree, tree);
107 static tree next_initializable_field (tree);
109 /* The following symbols are subsumed in the cp_global_trees array, and
110 listed here individually for documentation purposes.
113 tree wchar_decl_node;
115 tree vtable_entry_type;
116 tree delta_type_node;
117 tree __t_desc_type_node;
119 tree class_type_node;
120 tree unknown_type_node;
122 Array type `vtable_entry_type[]'
125 tree vtbl_ptr_type_node;
132 A FUNCTION_DECL which can call `abort'. Not necessarily the
133 one that the user will declare, but sufficient to be called
134 by routines that want to abort the program.
138 The FUNCTION_DECL for the default `::operator delete'.
140 tree global_delete_fndecl;
143 tree type_info_type_node, tinfo_decl_id, tinfo_decl_type;
144 tree tinfo_var_id; */
146 tree cp_global_trees[CPTI_MAX];
148 /* Indicates that there is a type value in some namespace, although
149 that is not necessarily in scope at the moment. */
151 tree global_type_node;
153 /* The node that holds the "name" of the global scope. */
154 tree global_scope_name;
156 #define local_names cp_function_chain->x_local_names
158 /* A list of objects which have constructors or destructors
159 which reside in the global scope. The decl is stored in
160 the TREE_VALUE slot and the initializer is stored
161 in the TREE_PURPOSE slot. */
162 tree static_aggregates;
166 /* A node for the integer constants 2, and 3. */
168 tree integer_two_node, integer_three_node;
170 /* Used only for jumps to as-yet undefined labels, since jumps to
171 defined labels can have their validity checked immediately. */
173 struct named_label_use_entry GTY(())
175 struct named_label_use_entry *next;
176 /* The binding level to which this entry is *currently* attached.
177 This is initially the binding level in which the goto appeared,
178 but is modified as scopes are closed. */
179 struct cp_binding_level *binding_level;
180 /* The head of the names list that was current when the goto appeared,
181 or the inner scope popped. These are the decls that will *not* be
182 skipped when jumping to the label. */
184 /* The location of the goto, for error reporting. */
185 location_t o_goto_locus;
186 /* True if an OpenMP structured block scope has been closed since
187 the goto appeared. This means that the branch from the label will
188 illegally exit an OpenMP scope. */
192 /* A list of all LABEL_DECLs in the function that have names. Here so
193 we can clear out their names' definitions at the end of the
194 function, and so we can check the validity of jumps to these labels. */
196 struct named_label_entry GTY(())
198 /* The decl itself. */
201 /* The binding level to which the label is *currently* attached.
202 This is initially set to the binding level in which the label
203 is defined, but is modified as scopes are closed. */
204 struct cp_binding_level *binding_level;
205 /* The head of the names list that was current when the label was
206 defined, or the inner scope popped. These are the decls that will
207 be skipped when jumping to the label. */
209 /* A tree list of all decls from all binding levels that would be
210 crossed by a backward branch to the label. */
213 /* A list of uses of the label, before the label is defined. */
214 struct named_label_use_entry *uses;
216 /* The following bits are set after the label is defined, and are
217 updated as scopes are popped. They indicate that a backward jump
218 to the label will illegally enter a scope of the given flavor. */
224 #define named_labels cp_function_chain->x_named_labels
226 /* The number of function bodies which we are currently processing.
227 (Zero if we are at namespace scope, one inside the body of a
228 function, two inside the body of a function in a local class, etc.) */
231 /* States indicating how grokdeclarator() should handle declspecs marked
232 with __attribute__((deprecated)). An object declared as
233 __attribute__((deprecated)) suppresses warnings of uses of other
236 enum deprecated_states {
241 static enum deprecated_states deprecated_state = DEPRECATED_NORMAL;
244 /* A TREE_LIST of VAR_DECLs. The TREE_PURPOSE is a RECORD_TYPE or
245 UNION_TYPE; the TREE_VALUE is a VAR_DECL with that type. At the
246 time the VAR_DECL was declared, the type was incomplete. */
248 static GTY(()) tree incomplete_vars;
250 /* Returns the kind of template specialization we are currently
251 processing, given that it's declaration contained N_CLASS_SCOPES
252 explicit scope qualifications. */
255 current_tmpl_spec_kind (int n_class_scopes)
257 int n_template_parm_scopes = 0;
258 int seen_specialization_p = 0;
259 int innermost_specialization_p = 0;
260 struct cp_binding_level *b;
262 /* Scan through the template parameter scopes. */
263 for (b = current_binding_level;
264 b->kind == sk_template_parms;
267 /* If we see a specialization scope inside a parameter scope,
268 then something is wrong. That corresponds to a declaration
271 template <class T> template <> ...
273 which is always invalid since [temp.expl.spec] forbids the
274 specialization of a class member template if the enclosing
275 class templates are not explicitly specialized as well. */
276 if (b->explicit_spec_p)
278 if (n_template_parm_scopes == 0)
279 innermost_specialization_p = 1;
281 seen_specialization_p = 1;
283 else if (seen_specialization_p == 1)
284 return tsk_invalid_member_spec;
286 ++n_template_parm_scopes;
289 /* Handle explicit instantiations. */
290 if (processing_explicit_instantiation)
292 if (n_template_parm_scopes != 0)
293 /* We've seen a template parameter list during an explicit
294 instantiation. For example:
296 template <class T> template void f(int);
298 This is erroneous. */
299 return tsk_invalid_expl_inst;
301 return tsk_expl_inst;
304 if (n_template_parm_scopes < n_class_scopes)
305 /* We've not seen enough template headers to match all the
306 specialized classes present. For example:
308 template <class T> void R<T>::S<T>::f(int);
310 This is invalid; there needs to be one set of template
311 parameters for each class. */
312 return tsk_insufficient_parms;
313 else if (n_template_parm_scopes == n_class_scopes)
314 /* We're processing a non-template declaration (even though it may
315 be a member of a template class.) For example:
317 template <class T> void S<T>::f(int);
319 The `class T' maches the `S<T>', leaving no template headers
320 corresponding to the `f'. */
322 else if (n_template_parm_scopes > n_class_scopes + 1)
323 /* We've got too many template headers. For example:
325 template <> template <class T> void f (T);
327 There need to be more enclosing classes. */
328 return tsk_excessive_parms;
330 /* This must be a template. It's of the form:
332 template <class T> template <class U> void S<T>::f(U);
334 This is a specialization if the innermost level was a
335 specialization; otherwise it's just a definition of the
337 return innermost_specialization_p ? tsk_expl_spec : tsk_template;
340 /* Exit the current scope. */
348 /* When a label goes out of scope, check to see if that label was used
349 in a valid manner, and issue any appropriate warnings or errors. */
352 pop_label (tree label, tree old_value)
354 if (!processing_template_decl)
356 if (DECL_INITIAL (label) == NULL_TREE)
360 error ("label %q+D used but not defined", label);
361 #ifdef USE_MAPPED_LOCATION
362 location = input_location; /* FIXME want (input_filename, (line)0) */
364 location.file = input_filename;
367 /* Avoid crashing later. */
368 define_label (location, DECL_NAME (label));
370 else if (!TREE_USED (label))
371 warning (OPT_Wunused_label, "label %q+D defined but not used", label);
374 SET_IDENTIFIER_LABEL_VALUE (DECL_NAME (label), old_value);
377 /* At the end of a function, all labels declared within the function
378 go out of scope. BLOCK is the top-level block for the
382 pop_labels_1 (void **slot, void *data)
384 struct named_label_entry *ent = (struct named_label_entry *) *slot;
385 tree block = (tree) data;
387 pop_label (ent->label_decl, NULL_TREE);
389 /* Put the labels into the "variables" of the top-level block,
390 so debugger can see them. */
391 TREE_CHAIN (ent->label_decl) = BLOCK_VARS (block);
392 BLOCK_VARS (block) = ent->label_decl;
394 htab_clear_slot (named_labels, slot);
400 pop_labels (tree block)
404 htab_traverse (named_labels, pop_labels_1, block);
409 /* At the end of a block with local labels, restore the outer definition. */
412 pop_local_label (tree label, tree old_value)
414 struct named_label_entry dummy;
417 pop_label (label, old_value);
419 dummy.label_decl = label;
420 slot = htab_find_slot (named_labels, &dummy, NO_INSERT);
421 htab_clear_slot (named_labels, slot);
424 /* The following two routines are used to interface to Objective-C++.
425 The binding level is purposely treated as an opaque type. */
428 objc_get_current_scope (void)
430 return current_binding_level;
433 /* The following routine is used by the NeXT-style SJLJ exceptions;
434 variables get marked 'volatile' so as to not be clobbered by
435 _setjmp()/_longjmp() calls. All variables in the current scope,
436 as well as parent scopes up to (but not including) ENCLOSING_BLK
437 shall be thusly marked. */
440 objc_mark_locals_volatile (void *enclosing_blk)
442 struct cp_binding_level *scope;
444 for (scope = current_binding_level;
445 scope && scope != enclosing_blk;
446 scope = scope->level_chain)
450 for (decl = scope->names; decl; decl = TREE_CHAIN (decl))
451 objc_volatilize_decl (decl);
453 /* Do not climb up past the current function. */
454 if (scope->kind == sk_function_parms)
459 /* Update data for defined and undefined labels when leaving a scope. */
462 poplevel_named_label_1 (void **slot, void *data)
464 struct named_label_entry *ent = (struct named_label_entry *) *slot;
465 struct cp_binding_level *bl = (struct cp_binding_level *) data;
466 struct cp_binding_level *obl = bl->level_chain;
468 if (ent->binding_level == bl)
472 for (decl = ent->names_in_scope; decl; decl = TREE_CHAIN (decl))
473 if (decl_jump_unsafe (decl))
474 ent->bad_decls = tree_cons (NULL, decl, ent->bad_decls);
476 ent->binding_level = obl;
477 ent->names_in_scope = obl->names;
481 ent->in_try_scope = true;
484 ent->in_catch_scope = true;
487 ent->in_omp_scope = true;
495 struct named_label_use_entry *use;
497 for (use = ent->uses; use ; use = use->next)
498 if (use->binding_level == bl)
500 use->binding_level = obl;
501 use->names_in_scope = obl->names;
502 if (bl->kind == sk_omp)
503 use->in_omp_scope = true;
510 /* Exit a binding level.
511 Pop the level off, and restore the state of the identifier-decl mappings
512 that were in effect when this level was entered.
514 If KEEP == 1, this level had explicit declarations, so
515 and create a "block" (a BLOCK node) for the level
516 to record its declarations and subblocks for symbol table output.
518 If FUNCTIONBODY is nonzero, this level is the body of a function,
519 so create a block as if KEEP were set and also clear out all
522 If REVERSE is nonzero, reverse the order of decls before putting
523 them into the BLOCK. */
526 poplevel (int keep, int reverse, int functionbody)
529 /* The chain of decls was accumulated in reverse order.
530 Put it into forward order, just for cleanliness. */
532 int tmp = functionbody;
533 int real_functionbody;
537 int leaving_for_scope;
540 timevar_push (TV_NAME_LOOKUP);
545 gcc_assert (current_binding_level->kind != sk_class);
547 real_functionbody = (current_binding_level->kind == sk_cleanup
548 ? ((functionbody = 0), tmp) : functionbody);
549 subblocks = functionbody >= 0 ? current_binding_level->blocks : 0;
551 gcc_assert (!VEC_length(cp_class_binding,
552 current_binding_level->class_shadowed));
554 /* We used to use KEEP == 2 to indicate that the new block should go
555 at the beginning of the list of blocks at this binding level,
556 rather than the end. This hack is no longer used. */
557 gcc_assert (keep == 0 || keep == 1);
559 if (current_binding_level->keep)
562 /* Any uses of undefined labels, and any defined labels, now operate
563 under constraints of next binding contour. */
564 if (cfun && !functionbody && named_labels)
565 htab_traverse (named_labels, poplevel_named_label_1,
566 current_binding_level);
568 /* Get the decls in the order they were written.
569 Usually current_binding_level->names is in reverse order.
570 But parameter decls were previously put in forward order. */
573 current_binding_level->names
574 = decls = nreverse (current_binding_level->names);
576 decls = current_binding_level->names;
578 /* If there were any declarations or structure tags in that level,
579 or if this level is a function body,
580 create a BLOCK to record them for the life of this function. */
582 if (keep == 1 || functionbody)
583 block = make_node (BLOCK);
584 if (block != NULL_TREE)
586 BLOCK_VARS (block) = decls;
587 BLOCK_SUBBLOCKS (block) = subblocks;
590 /* In each subblock, record that this is its superior. */
592 for (link = subblocks; link; link = TREE_CHAIN (link))
593 BLOCK_SUPERCONTEXT (link) = block;
595 /* We still support the old for-scope rules, whereby the variables
596 in a for-init statement were in scope after the for-statement
597 ended. We only use the new rules if flag_new_for_scope is
600 = current_binding_level->kind == sk_for && flag_new_for_scope == 1;
602 /* Before we remove the declarations first check for unused variables. */
603 if (warn_unused_variable
604 && !processing_template_decl)
605 for (decl = getdecls (); decl; decl = TREE_CHAIN (decl))
606 if (TREE_CODE (decl) == VAR_DECL
607 && ! TREE_USED (decl)
608 && ! DECL_IN_SYSTEM_HEADER (decl)
609 && DECL_NAME (decl) && ! DECL_ARTIFICIAL (decl))
610 warning (OPT_Wunused_variable, "unused variable %q+D", decl);
612 /* Remove declarations for all the DECLs in this level. */
613 for (link = decls; link; link = TREE_CHAIN (link))
615 if (leaving_for_scope && TREE_CODE (link) == VAR_DECL
618 tree name = DECL_NAME (link);
622 ob = outer_binding (name,
623 IDENTIFIER_BINDING (name),
626 ns_binding = IDENTIFIER_NAMESPACE_VALUE (name);
628 ns_binding = NULL_TREE;
630 if (ob && ob->scope == current_binding_level->level_chain)
631 /* We have something like:
636 and we are leaving the `for' scope. There's no reason to
637 keep the binding of the inner `i' in this case. */
638 pop_binding (name, link);
639 else if ((ob && (TREE_CODE (ob->value) == TYPE_DECL))
640 || (ns_binding && TREE_CODE (ns_binding) == TYPE_DECL))
641 /* Here, we have something like:
649 We must pop the for-scope binding so we know what's a
650 type and what isn't. */
651 pop_binding (name, link);
654 /* Mark this VAR_DECL as dead so that we can tell we left it
655 there only for backward compatibility. */
656 DECL_DEAD_FOR_LOCAL (link) = 1;
658 /* Keep track of what should have happened when we
659 popped the binding. */
662 SET_DECL_SHADOWED_FOR_VAR (link, ob->value);
663 DECL_HAS_SHADOWED_FOR_VAR_P (link) = 1;
666 /* Add it to the list of dead variables in the next
667 outermost binding to that we can remove these when we
668 leave that binding. */
669 current_binding_level->level_chain->dead_vars_from_for
670 = tree_cons (NULL_TREE, link,
671 current_binding_level->level_chain->
674 /* Although we don't pop the cxx_binding, we do clear
675 its SCOPE since the scope is going away now. */
676 IDENTIFIER_BINDING (name)->scope
677 = current_binding_level->level_chain;
684 /* Remove the binding. */
687 if (TREE_CODE (decl) == TREE_LIST)
688 decl = TREE_VALUE (decl);
691 if (TREE_CODE (name) == OVERLOAD)
692 name = OVL_FUNCTION (name);
694 gcc_assert (DECL_P (name));
695 pop_binding (DECL_NAME (name), decl);
699 /* Remove declarations for any `for' variables from inner scopes
700 that we kept around. */
701 for (link = current_binding_level->dead_vars_from_for;
702 link; link = TREE_CHAIN (link))
703 pop_binding (DECL_NAME (TREE_VALUE (link)), TREE_VALUE (link));
705 /* Restore the IDENTIFIER_TYPE_VALUEs. */
706 for (link = current_binding_level->type_shadowed;
707 link; link = TREE_CHAIN (link))
708 SET_IDENTIFIER_TYPE_VALUE (TREE_PURPOSE (link), TREE_VALUE (link));
710 /* Restore the IDENTIFIER_LABEL_VALUEs for local labels. */
711 for (link = current_binding_level->shadowed_labels;
713 link = TREE_CHAIN (link))
714 pop_local_label (TREE_VALUE (link), TREE_PURPOSE (link));
716 /* There may be OVERLOADs (wrapped in TREE_LISTs) on the BLOCK_VARs
717 list if a `using' declaration put them there. The debugging
718 back-ends won't understand OVERLOAD, so we remove them here.
719 Because the BLOCK_VARS are (temporarily) shared with
720 CURRENT_BINDING_LEVEL->NAMES we must do this fixup after we have
721 popped all the bindings. */
726 for (d = &BLOCK_VARS (block); *d; )
728 if (TREE_CODE (*d) == TREE_LIST)
729 *d = TREE_CHAIN (*d);
731 d = &TREE_CHAIN (*d);
735 /* If the level being exited is the top level of a function,
736 check over all the labels. */
739 /* Since this is the top level block of a function, the vars are
740 the function's parameters. Don't leave them in the BLOCK
741 because they are found in the FUNCTION_DECL instead. */
742 BLOCK_VARS (block) = 0;
746 kind = current_binding_level->kind;
747 if (kind == sk_cleanup)
751 /* If this is a temporary binding created for a cleanup, then we'll
752 have pushed a statement list level. Pop that, create a new
753 BIND_EXPR for the block, and insert it into the stream. */
754 stmt = pop_stmt_list (current_binding_level->statement_list);
755 stmt = c_build_bind_expr (block, stmt);
761 DECL_INITIAL (current_function_decl) = block;
763 current_binding_level->blocks
764 = chainon (current_binding_level->blocks, block);
766 /* If we did not make a block for the level just exited,
767 any blocks made for inner levels
768 (since they cannot be recorded as subblocks in that level)
769 must be carried forward so they will later become subblocks
770 of something else. */
772 current_binding_level->blocks
773 = chainon (current_binding_level->blocks, subblocks);
775 /* Each and every BLOCK node created here in `poplevel' is important
776 (e.g. for proper debugging information) so if we created one
777 earlier, mark it as "used". */
779 TREE_USED (block) = 1;
781 /* All temporary bindings created for cleanups are popped silently. */
782 if (kind == sk_cleanup)
785 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, block);
788 /* Insert BLOCK at the end of the list of subblocks of the
789 current binding level. This is used when a BIND_EXPR is expanded,
790 to handle the BLOCK node inside the BIND_EXPR. */
793 insert_block (tree block)
795 TREE_USED (block) = 1;
796 current_binding_level->blocks
797 = chainon (current_binding_level->blocks, block);
800 /* Walk all the namespaces contained NAMESPACE, including NAMESPACE
801 itself, calling F for each. The DATA is passed to F as well. */
804 walk_namespaces_r (tree namespace, walk_namespaces_fn f, void* data)
807 tree current = NAMESPACE_LEVEL (namespace)->namespaces;
809 result |= (*f) (namespace, data);
811 for (; current; current = TREE_CHAIN (current))
812 result |= walk_namespaces_r (current, f, data);
817 /* Walk all the namespaces, calling F for each. The DATA is passed to
821 walk_namespaces (walk_namespaces_fn f, void* data)
823 return walk_namespaces_r (global_namespace, f, data);
826 /* Call wrapup_globals_declarations for the globals in NAMESPACE. If
827 DATA is non-NULL, this is the last time we will call
828 wrapup_global_declarations for this NAMESPACE. */
831 wrapup_globals_for_namespace (tree namespace, void* data)
833 struct cp_binding_level *level = NAMESPACE_LEVEL (namespace);
834 VEC(tree,gc) *statics = level->static_decls;
835 tree *vec = VEC_address (tree, statics);
836 int len = VEC_length (tree, statics);
837 int last_time = (data != 0);
841 check_global_declarations (vec, len);
842 emit_debug_global_declarations (vec, len);
846 /* Write out any globals that need to be output. */
847 return wrapup_global_declarations (vec, len);
851 /* In C++, you don't have to write `struct S' to refer to `S'; you
852 can just use `S'. We accomplish this by creating a TYPE_DECL as
853 if the user had written `typedef struct S S'. Create and return
854 the TYPE_DECL for TYPE. */
857 create_implicit_typedef (tree name, tree type)
861 decl = build_decl (TYPE_DECL, name, type);
862 DECL_ARTIFICIAL (decl) = 1;
863 /* There are other implicit type declarations, like the one *within*
864 a class that allows you to write `S::S'. We must distinguish
866 SET_DECL_IMPLICIT_TYPEDEF_P (decl);
867 TYPE_NAME (type) = decl;
872 /* Remember a local name for name-mangling purposes. */
875 push_local_name (tree decl)
880 timevar_push (TV_NAME_LOOKUP);
882 name = DECL_NAME (decl);
884 nelts = VEC_length (tree, local_names);
885 for (i = 0; i < nelts; i++)
887 t = VEC_index (tree, local_names, i);
888 if (DECL_NAME (t) == name)
890 if (!DECL_LANG_SPECIFIC (decl))
891 retrofit_lang_decl (decl);
892 DECL_LANG_SPECIFIC (decl)->decl_flags.u2sel = 1;
893 if (DECL_LANG_SPECIFIC (t))
894 DECL_DISCRIMINATOR (decl) = DECL_DISCRIMINATOR (t) + 1;
896 DECL_DISCRIMINATOR (decl) = 1;
898 VEC_replace (tree, local_names, i, decl);
899 timevar_pop (TV_NAME_LOOKUP);
904 VEC_safe_push (tree, gc, local_names, decl);
905 timevar_pop (TV_NAME_LOOKUP);
908 /* Subroutine of duplicate_decls: return truthvalue of whether
909 or not types of these decls match.
911 For C++, we must compare the parameter list so that `int' can match
912 `int&' in a parameter position, but `int&' is not confused with
916 decls_match (tree newdecl, tree olddecl)
920 if (newdecl == olddecl)
923 if (TREE_CODE (newdecl) != TREE_CODE (olddecl))
924 /* If the two DECLs are not even the same kind of thing, we're not
925 interested in their types. */
928 if (TREE_CODE (newdecl) == FUNCTION_DECL)
930 tree f1 = TREE_TYPE (newdecl);
931 tree f2 = TREE_TYPE (olddecl);
932 tree p1 = TYPE_ARG_TYPES (f1);
933 tree p2 = TYPE_ARG_TYPES (f2);
935 if (CP_DECL_CONTEXT (newdecl) != CP_DECL_CONTEXT (olddecl)
936 && ! (DECL_EXTERN_C_P (newdecl)
937 && DECL_EXTERN_C_P (olddecl)))
940 if (TREE_CODE (f1) != TREE_CODE (f2))
943 if (same_type_p (TREE_TYPE (f1), TREE_TYPE (f2)))
945 if (p2 == NULL_TREE && DECL_EXTERN_C_P (olddecl)
946 && (DECL_BUILT_IN (olddecl)
947 #ifndef NO_IMPLICIT_EXTERN_C
948 || (DECL_IN_SYSTEM_HEADER (newdecl) && !DECL_CLASS_SCOPE_P (newdecl))
949 || (DECL_IN_SYSTEM_HEADER (olddecl) && !DECL_CLASS_SCOPE_P (olddecl))
953 types_match = self_promoting_args_p (p1);
954 if (p1 == void_list_node)
955 TREE_TYPE (newdecl) = TREE_TYPE (olddecl);
957 #ifndef NO_IMPLICIT_EXTERN_C
958 else if (p1 == NULL_TREE
959 && (DECL_EXTERN_C_P (olddecl)
960 && DECL_IN_SYSTEM_HEADER (olddecl)
961 && !DECL_CLASS_SCOPE_P (olddecl))
962 && (DECL_EXTERN_C_P (newdecl)
963 && DECL_IN_SYSTEM_HEADER (newdecl)
964 && !DECL_CLASS_SCOPE_P (newdecl)))
966 types_match = self_promoting_args_p (p2);
967 TREE_TYPE (newdecl) = TREE_TYPE (olddecl);
971 types_match = compparms (p1, p2);
976 else if (TREE_CODE (newdecl) == TEMPLATE_DECL)
978 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl))
979 != TREE_CODE (DECL_TEMPLATE_RESULT (olddecl)))
982 if (!comp_template_parms (DECL_TEMPLATE_PARMS (newdecl),
983 DECL_TEMPLATE_PARMS (olddecl)))
986 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == TYPE_DECL)
987 types_match = same_type_p (TREE_TYPE (DECL_TEMPLATE_RESULT (olddecl)),
988 TREE_TYPE (DECL_TEMPLATE_RESULT (newdecl)));
990 types_match = decls_match (DECL_TEMPLATE_RESULT (olddecl),
991 DECL_TEMPLATE_RESULT (newdecl));
995 /* Need to check scope for variable declaration (VAR_DECL).
996 For typedef (TYPE_DECL), scope is ignored. */
997 if (TREE_CODE (newdecl) == VAR_DECL
998 && CP_DECL_CONTEXT (newdecl) != CP_DECL_CONTEXT (olddecl)
1000 Two declarations for an object with C language linkage
1001 with the same name (ignoring the namespace that qualify
1002 it) that appear in different namespace scopes refer to
1004 && !(DECL_EXTERN_C_P (olddecl) && DECL_EXTERN_C_P (newdecl)))
1007 if (TREE_TYPE (newdecl) == error_mark_node)
1008 types_match = TREE_TYPE (olddecl) == error_mark_node;
1009 else if (TREE_TYPE (olddecl) == NULL_TREE)
1010 types_match = TREE_TYPE (newdecl) == NULL_TREE;
1011 else if (TREE_TYPE (newdecl) == NULL_TREE)
1014 types_match = comptypes (TREE_TYPE (newdecl),
1015 TREE_TYPE (olddecl),
1016 COMPARE_REDECLARATION);
1022 /* If NEWDECL is `static' and an `extern' was seen previously,
1023 warn about it. OLDDECL is the previous declaration.
1025 Note that this does not apply to the C++ case of declaring
1026 a variable `extern const' and then later `const'.
1028 Don't complain about built-in functions, since they are beyond
1029 the user's control. */
1032 warn_extern_redeclared_static (tree newdecl, tree olddecl)
1036 if (TREE_CODE (newdecl) == TYPE_DECL
1037 || TREE_CODE (newdecl) == TEMPLATE_DECL
1038 || TREE_CODE (newdecl) == CONST_DECL
1039 || TREE_CODE (newdecl) == NAMESPACE_DECL)
1042 /* Don't get confused by static member functions; that's a different
1044 if (TREE_CODE (newdecl) == FUNCTION_DECL
1045 && DECL_STATIC_FUNCTION_P (newdecl))
1048 /* If the old declaration was `static', or the new one isn't, then
1049 then everything is OK. */
1050 if (DECL_THIS_STATIC (olddecl) || !DECL_THIS_STATIC (newdecl))
1053 /* It's OK to declare a builtin function as `static'. */
1054 if (TREE_CODE (olddecl) == FUNCTION_DECL
1055 && DECL_ARTIFICIAL (olddecl))
1058 name = DECL_ASSEMBLER_NAME (newdecl);
1059 pedwarn ("%qD was declared %<extern%> and later %<static%>", newdecl);
1060 pedwarn ("previous declaration of %q+D", olddecl);
1063 /* NEW_DECL is a redeclaration of OLD_DECL; both are functions or
1064 function templates. If their exception specifications do not
1065 match, issue an a diagnostic. */
1068 check_redeclaration_exception_specification (tree new_decl,
1073 tree new_exceptions;
1074 tree old_exceptions;
1076 new_type = TREE_TYPE (new_decl);
1077 new_exceptions = TYPE_RAISES_EXCEPTIONS (new_type);
1078 old_type = TREE_TYPE (old_decl);
1079 old_exceptions = TYPE_RAISES_EXCEPTIONS (old_type);
1083 If any declaration of a function has an exception-specification,
1084 all declarations, including the definition and an explicit
1085 specialization, of that function shall have an
1086 exception-specification with the same set of type-ids. */
1087 if ((pedantic || ! DECL_IN_SYSTEM_HEADER (old_decl))
1088 && ! DECL_IS_BUILTIN (old_decl)
1090 && !comp_except_specs (new_exceptions, old_exceptions,
1093 error ("declaration of %qF throws different exceptions", new_decl);
1094 error ("from previous declaration %q+F", old_decl);
1098 /* If NEWDECL is a redeclaration of OLDDECL, merge the declarations.
1099 If the redeclaration is invalid, a diagnostic is issued, and the
1100 error_mark_node is returned. Otherwise, OLDDECL is returned.
1102 If NEWDECL is not a redeclaration of OLDDECL, NULL_TREE is
1105 NEWDECL_IS_FRIEND is true if NEWDECL was declared as a friend. */
1108 duplicate_decls (tree newdecl, tree olddecl, bool newdecl_is_friend)
1110 unsigned olddecl_uid = DECL_UID (olddecl);
1111 int olddecl_friend = 0, types_match = 0, hidden_friend = 0;
1112 int new_defines_function = 0;
1115 if (newdecl == olddecl)
1118 types_match = decls_match (newdecl, olddecl);
1120 /* If either the type of the new decl or the type of the old decl is an
1121 error_mark_node, then that implies that we have already issued an
1122 error (earlier) for some bogus type specification, and in that case,
1123 it is rather pointless to harass the user with yet more error message
1124 about the same declaration, so just pretend the types match here. */
1125 if (TREE_TYPE (newdecl) == error_mark_node
1126 || TREE_TYPE (olddecl) == error_mark_node)
1127 return error_mark_node;
1129 if (DECL_P (olddecl)
1130 && TREE_CODE (newdecl) == FUNCTION_DECL
1131 && TREE_CODE (olddecl) == FUNCTION_DECL
1132 && (DECL_UNINLINABLE (newdecl) || DECL_UNINLINABLE (olddecl)))
1134 if (DECL_DECLARED_INLINE_P (newdecl)
1135 && DECL_UNINLINABLE (newdecl)
1136 && lookup_attribute ("noinline", DECL_ATTRIBUTES (newdecl)))
1137 /* Already warned elsewhere. */;
1138 else if (DECL_DECLARED_INLINE_P (olddecl)
1139 && DECL_UNINLINABLE (olddecl)
1140 && lookup_attribute ("noinline", DECL_ATTRIBUTES (olddecl)))
1141 /* Already warned. */;
1142 else if (DECL_DECLARED_INLINE_P (newdecl)
1143 && DECL_UNINLINABLE (olddecl)
1144 && lookup_attribute ("noinline", DECL_ATTRIBUTES (olddecl)))
1146 warning (OPT_Wattributes, "function %q+D redeclared as inline",
1148 warning (OPT_Wattributes, "previous declaration of %q+D "
1149 "with attribute noinline", olddecl);
1151 else if (DECL_DECLARED_INLINE_P (olddecl)
1152 && DECL_UNINLINABLE (newdecl)
1153 && lookup_attribute ("noinline", DECL_ATTRIBUTES (newdecl)))
1155 warning (OPT_Wattributes, "function %q+D redeclared with "
1156 "attribute noinline", newdecl);
1157 warning (OPT_Wattributes, "previous declaration of %q+D was inline",
1162 /* Check for redeclaration and other discrepancies. */
1163 if (TREE_CODE (olddecl) == FUNCTION_DECL
1164 && DECL_ARTIFICIAL (olddecl))
1166 gcc_assert (!DECL_HIDDEN_FRIEND_P (olddecl));
1167 if (TREE_CODE (newdecl) != FUNCTION_DECL)
1169 /* Avoid warnings redeclaring built-ins which have not been
1170 explicitly declared. */
1171 if (DECL_ANTICIPATED (olddecl))
1174 /* If you declare a built-in or predefined function name as static,
1175 the old definition is overridden, but optionally warn this was a
1176 bad choice of name. */
1177 if (! TREE_PUBLIC (newdecl))
1179 warning (OPT_Wshadow, "shadowing %s function %q#D",
1180 DECL_BUILT_IN (olddecl) ? "built-in" : "library",
1182 /* Discard the old built-in function. */
1185 /* If the built-in is not ansi, then programs can override
1186 it even globally without an error. */
1187 else if (! DECL_BUILT_IN (olddecl))
1188 warning (0, "library function %q#D redeclared as non-function %q#D",
1192 error ("declaration of %q#D", newdecl);
1193 error ("conflicts with built-in declaration %q#D",
1198 else if (!types_match)
1200 /* Avoid warnings redeclaring built-ins which have not been
1201 explicitly declared. */
1202 if (DECL_ANTICIPATED (olddecl))
1204 /* Deal with fileptr_type_node. FILE type is not known
1205 at the time we create the builtins. */
1208 for (t1 = TYPE_ARG_TYPES (TREE_TYPE (newdecl)),
1209 t2 = TYPE_ARG_TYPES (TREE_TYPE (olddecl));
1211 t1 = TREE_CHAIN (t1), t2 = TREE_CHAIN (t2))
1214 else if (TREE_VALUE (t2) == fileptr_type_node)
1216 tree t = TREE_VALUE (t1);
1218 if (TREE_CODE (t) == POINTER_TYPE
1219 && TYPE_NAME (TREE_TYPE (t))
1220 && DECL_NAME (TYPE_NAME (TREE_TYPE (t)))
1221 == get_identifier ("FILE")
1222 && compparms (TREE_CHAIN (t1), TREE_CHAIN (t2)))
1224 tree oldargs = TYPE_ARG_TYPES (TREE_TYPE (olddecl));
1226 TYPE_ARG_TYPES (TREE_TYPE (olddecl))
1227 = TYPE_ARG_TYPES (TREE_TYPE (newdecl));
1228 types_match = decls_match (newdecl, olddecl);
1230 return duplicate_decls (newdecl, olddecl,
1232 TYPE_ARG_TYPES (TREE_TYPE (olddecl)) = oldargs;
1235 else if (! same_type_p (TREE_VALUE (t1), TREE_VALUE (t2)))
1238 else if ((DECL_EXTERN_C_P (newdecl)
1239 && DECL_EXTERN_C_P (olddecl))
1240 || compparms (TYPE_ARG_TYPES (TREE_TYPE (newdecl)),
1241 TYPE_ARG_TYPES (TREE_TYPE (olddecl))))
1243 /* A near match; override the builtin. */
1245 if (TREE_PUBLIC (newdecl))
1247 warning (0, "new declaration %q#D", newdecl);
1248 warning (0, "ambiguates built-in declaration %q#D",
1252 warning (OPT_Wshadow, "shadowing %s function %q#D",
1253 DECL_BUILT_IN (olddecl) ? "built-in" : "library",
1257 /* Discard the old built-in function. */
1260 /* Replace the old RTL to avoid problems with inlining. */
1261 COPY_DECL_RTL (newdecl, olddecl);
1263 /* Even if the types match, prefer the new declarations type for
1264 built-ins which have not been explicitly declared, for
1265 exception lists, etc... */
1266 else if (DECL_ANTICIPATED (olddecl))
1268 tree type = TREE_TYPE (newdecl);
1269 tree attribs = (*targetm.merge_type_attributes)
1270 (TREE_TYPE (olddecl), type);
1272 type = cp_build_type_attribute_variant (type, attribs);
1273 TREE_TYPE (newdecl) = TREE_TYPE (olddecl) = type;
1276 /* Whether or not the builtin can throw exceptions has no
1277 bearing on this declarator. */
1278 TREE_NOTHROW (olddecl) = 0;
1280 if (DECL_THIS_STATIC (newdecl) && !DECL_THIS_STATIC (olddecl))
1282 /* If a builtin function is redeclared as `static', merge
1283 the declarations, but make the original one static. */
1284 DECL_THIS_STATIC (olddecl) = 1;
1285 TREE_PUBLIC (olddecl) = 0;
1287 /* Make the old declaration consistent with the new one so
1288 that all remnants of the builtin-ness of this function
1289 will be banished. */
1290 SET_DECL_LANGUAGE (olddecl, DECL_LANGUAGE (newdecl));
1291 COPY_DECL_RTL (newdecl, olddecl);
1294 else if (TREE_CODE (olddecl) != TREE_CODE (newdecl))
1296 if ((TREE_CODE (olddecl) == TYPE_DECL && DECL_ARTIFICIAL (olddecl)
1297 && TREE_CODE (newdecl) != TYPE_DECL
1298 && ! (TREE_CODE (newdecl) == TEMPLATE_DECL
1299 && TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == TYPE_DECL))
1300 || (TREE_CODE (newdecl) == TYPE_DECL && DECL_ARTIFICIAL (newdecl)
1301 && TREE_CODE (olddecl) != TYPE_DECL
1302 && ! (TREE_CODE (olddecl) == TEMPLATE_DECL
1303 && (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl))
1306 /* We do nothing special here, because C++ does such nasty
1307 things with TYPE_DECLs. Instead, just let the TYPE_DECL
1308 get shadowed, and know that if we need to find a TYPE_DECL
1309 for a given name, we can look in the IDENTIFIER_TYPE_VALUE
1310 slot of the identifier. */
1314 if ((TREE_CODE (newdecl) == FUNCTION_DECL
1315 && DECL_FUNCTION_TEMPLATE_P (olddecl))
1316 || (TREE_CODE (olddecl) == FUNCTION_DECL
1317 && DECL_FUNCTION_TEMPLATE_P (newdecl)))
1320 error ("%q#D redeclared as different kind of symbol", newdecl);
1321 if (TREE_CODE (olddecl) == TREE_LIST)
1322 olddecl = TREE_VALUE (olddecl);
1323 error ("previous declaration of %q+#D", olddecl);
1325 return error_mark_node;
1327 else if (!types_match)
1329 if (CP_DECL_CONTEXT (newdecl) != CP_DECL_CONTEXT (olddecl))
1330 /* These are certainly not duplicate declarations; they're
1331 from different scopes. */
1334 if (TREE_CODE (newdecl) == TEMPLATE_DECL)
1336 /* The name of a class template may not be declared to refer to
1337 any other template, class, function, object, namespace, value,
1338 or type in the same scope. */
1339 if (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl)) == TYPE_DECL
1340 || TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == TYPE_DECL)
1342 error ("declaration of template %q#D", newdecl);
1343 error ("conflicts with previous declaration %q+#D", olddecl);
1345 else if (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl)) == FUNCTION_DECL
1346 && TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == FUNCTION_DECL
1347 && compparms (TYPE_ARG_TYPES (TREE_TYPE (DECL_TEMPLATE_RESULT (olddecl))),
1348 TYPE_ARG_TYPES (TREE_TYPE (DECL_TEMPLATE_RESULT (newdecl))))
1349 && comp_template_parms (DECL_TEMPLATE_PARMS (newdecl),
1350 DECL_TEMPLATE_PARMS (olddecl))
1351 /* Template functions can be disambiguated by
1353 && same_type_p (TREE_TYPE (TREE_TYPE (newdecl)),
1354 TREE_TYPE (TREE_TYPE (olddecl))))
1356 error ("new declaration %q#D", newdecl);
1357 error ("ambiguates old declaration %q+#D", olddecl);
1361 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1363 if (DECL_EXTERN_C_P (newdecl) && DECL_EXTERN_C_P (olddecl))
1365 error ("declaration of C function %q#D conflicts with",
1367 error ("previous declaration %q+#D here", olddecl);
1369 else if (compparms (TYPE_ARG_TYPES (TREE_TYPE (newdecl)),
1370 TYPE_ARG_TYPES (TREE_TYPE (olddecl))))
1372 error ("new declaration %q#D", newdecl);
1373 error ("ambiguates old declaration %q+#D", olddecl);
1374 return error_mark_node;
1381 error ("conflicting declaration %q#D", newdecl);
1382 error ("%q+D has a previous declaration as %q#D", olddecl, olddecl);
1383 return error_mark_node;
1386 else if (TREE_CODE (newdecl) == FUNCTION_DECL
1387 && ((DECL_TEMPLATE_SPECIALIZATION (olddecl)
1388 && (!DECL_TEMPLATE_INFO (newdecl)
1389 || (DECL_TI_TEMPLATE (newdecl)
1390 != DECL_TI_TEMPLATE (olddecl))))
1391 || (DECL_TEMPLATE_SPECIALIZATION (newdecl)
1392 && (!DECL_TEMPLATE_INFO (olddecl)
1393 || (DECL_TI_TEMPLATE (olddecl)
1394 != DECL_TI_TEMPLATE (newdecl))))))
1395 /* It's OK to have a template specialization and a non-template
1396 with the same type, or to have specializations of two
1397 different templates with the same type. Note that if one is a
1398 specialization, and the other is an instantiation of the same
1399 template, that we do not exit at this point. That situation
1400 can occur if we instantiate a template class, and then
1401 specialize one of its methods. This situation is valid, but
1402 the declarations must be merged in the usual way. */
1404 else if (TREE_CODE (newdecl) == FUNCTION_DECL
1405 && ((DECL_TEMPLATE_INSTANTIATION (olddecl)
1406 && !DECL_USE_TEMPLATE (newdecl))
1407 || (DECL_TEMPLATE_INSTANTIATION (newdecl)
1408 && !DECL_USE_TEMPLATE (olddecl))))
1409 /* One of the declarations is a template instantiation, and the
1410 other is not a template at all. That's OK. */
1412 else if (TREE_CODE (newdecl) == NAMESPACE_DECL)
1414 /* In [namespace.alias] we have:
1416 In a declarative region, a namespace-alias-definition can be
1417 used to redefine a namespace-alias declared in that declarative
1418 region to refer only to the namespace to which it already
1421 Therefore, if we encounter a second alias directive for the same
1422 alias, we can just ignore the second directive. */
1423 if (DECL_NAMESPACE_ALIAS (newdecl)
1424 && (DECL_NAMESPACE_ALIAS (newdecl)
1425 == DECL_NAMESPACE_ALIAS (olddecl)))
1427 /* [namespace.alias]
1429 A namespace-name or namespace-alias shall not be declared as
1430 the name of any other entity in the same declarative region.
1431 A namespace-name defined at global scope shall not be
1432 declared as the name of any other entity in any global scope
1434 error ("declaration of namespace %qD conflicts with", newdecl);
1435 error ("previous declaration of namespace %q+D here", olddecl);
1436 return error_mark_node;
1440 const char *errmsg = redeclaration_error_message (newdecl, olddecl);
1443 error (errmsg, newdecl);
1444 if (DECL_NAME (olddecl) != NULL_TREE)
1445 error ((DECL_INITIAL (olddecl) && namespace_bindings_p ())
1446 ? "%q+#D previously defined here"
1447 : "%q+#D previously declared here", olddecl);
1448 return error_mark_node;
1450 else if (TREE_CODE (olddecl) == FUNCTION_DECL
1451 && DECL_INITIAL (olddecl) != NULL_TREE
1452 && TYPE_ARG_TYPES (TREE_TYPE (olddecl)) == NULL_TREE
1453 && TYPE_ARG_TYPES (TREE_TYPE (newdecl)) != NULL_TREE)
1455 /* Prototype decl follows defn w/o prototype. */
1456 warning (0, "prototype for %q+#D", newdecl);
1457 warning (0, "%Jfollows non-prototype definition here", olddecl);
1459 else if ((TREE_CODE (olddecl) == FUNCTION_DECL
1460 || TREE_CODE (olddecl) == VAR_DECL)
1461 && DECL_LANGUAGE (newdecl) != DECL_LANGUAGE (olddecl))
1464 If two declarations of the same function or object
1465 specify different linkage-specifications ..., the program
1466 is ill-formed.... Except for functions with C++ linkage,
1467 a function declaration without a linkage specification
1468 shall not precede the first linkage specification for
1469 that function. A function can be declared without a
1470 linkage specification after an explicit linkage
1471 specification has been seen; the linkage explicitly
1472 specified in the earlier declaration is not affected by
1473 such a function declaration.
1475 DR 563 raises the question why the restrictions on
1476 functions should not also apply to objects. Older
1477 versions of G++ silently ignore the linkage-specification
1485 which is clearly wrong. Therefore, we now treat objects
1487 if (current_lang_depth () == 0)
1489 /* There is no explicit linkage-specification, so we use
1490 the linkage from the previous declaration. */
1491 if (!DECL_LANG_SPECIFIC (newdecl))
1492 retrofit_lang_decl (newdecl);
1493 SET_DECL_LANGUAGE (newdecl, DECL_LANGUAGE (olddecl));
1497 error ("previous declaration of %q+#D with %qL linkage",
1498 olddecl, DECL_LANGUAGE (olddecl));
1499 error ("conflicts with new declaration with %qL linkage",
1500 DECL_LANGUAGE (newdecl));
1504 if (DECL_LANG_SPECIFIC (olddecl) && DECL_USE_TEMPLATE (olddecl))
1506 else if (TREE_CODE (olddecl) == FUNCTION_DECL)
1508 tree t1 = TYPE_ARG_TYPES (TREE_TYPE (olddecl));
1509 tree t2 = TYPE_ARG_TYPES (TREE_TYPE (newdecl));
1512 if (TREE_CODE (TREE_TYPE (newdecl)) == METHOD_TYPE)
1513 t1 = TREE_CHAIN (t1), t2 = TREE_CHAIN (t2);
1515 for (; t1 && t1 != void_list_node;
1516 t1 = TREE_CHAIN (t1), t2 = TREE_CHAIN (t2), i++)
1517 if (TREE_PURPOSE (t1) && TREE_PURPOSE (t2))
1519 if (1 == simple_cst_equal (TREE_PURPOSE (t1),
1522 pedwarn ("default argument given for parameter %d of %q#D",
1524 pedwarn ("after previous specification in %q+#D", olddecl);
1528 error ("default argument given for parameter %d of %q#D",
1530 error ("after previous specification in %q+#D",
1535 if (DECL_DECLARED_INLINE_P (newdecl)
1536 && ! DECL_DECLARED_INLINE_P (olddecl)
1537 && TREE_ADDRESSABLE (olddecl) && warn_inline)
1539 warning (0, "%q#D was used before it was declared inline", newdecl);
1540 warning (0, "%Jprevious non-inline declaration here", olddecl);
1545 /* Do not merge an implicit typedef with an explicit one. In:
1549 typedef class A A __attribute__ ((foo));
1551 the attribute should apply only to the typedef. */
1552 if (TREE_CODE (olddecl) == TYPE_DECL
1553 && (DECL_IMPLICIT_TYPEDEF_P (olddecl)
1554 || DECL_IMPLICIT_TYPEDEF_P (newdecl)))
1557 /* If new decl is `static' and an `extern' was seen previously,
1559 warn_extern_redeclared_static (newdecl, olddecl);
1561 /* We have committed to returning 1 at this point. */
1562 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1564 /* Now that functions must hold information normally held
1565 by field decls, there is extra work to do so that
1566 declaration information does not get destroyed during
1568 if (DECL_VINDEX (olddecl))
1569 DECL_VINDEX (newdecl) = DECL_VINDEX (olddecl);
1570 if (DECL_CONTEXT (olddecl))
1571 DECL_CONTEXT (newdecl) = DECL_CONTEXT (olddecl);
1572 DECL_STATIC_CONSTRUCTOR (newdecl) |= DECL_STATIC_CONSTRUCTOR (olddecl);
1573 DECL_STATIC_DESTRUCTOR (newdecl) |= DECL_STATIC_DESTRUCTOR (olddecl);
1574 DECL_PURE_VIRTUAL_P (newdecl) |= DECL_PURE_VIRTUAL_P (olddecl);
1575 DECL_VIRTUAL_P (newdecl) |= DECL_VIRTUAL_P (olddecl);
1576 DECL_THIS_STATIC (newdecl) |= DECL_THIS_STATIC (olddecl);
1577 if (DECL_OVERLOADED_OPERATOR_P (olddecl) != ERROR_MARK)
1578 SET_OVERLOADED_OPERATOR_CODE
1579 (newdecl, DECL_OVERLOADED_OPERATOR_P (olddecl));
1580 new_defines_function = DECL_INITIAL (newdecl) != NULL_TREE;
1582 /* Optionally warn about more than one declaration for the same
1583 name, but don't warn about a function declaration followed by a
1585 if (warn_redundant_decls && ! DECL_ARTIFICIAL (olddecl)
1586 && !(new_defines_function && DECL_INITIAL (olddecl) == NULL_TREE)
1587 /* Don't warn about extern decl followed by definition. */
1588 && !(DECL_EXTERNAL (olddecl) && ! DECL_EXTERNAL (newdecl))
1589 /* Don't warn about friends, let add_friend take care of it. */
1590 && ! (newdecl_is_friend || DECL_FRIEND_P (olddecl)))
1592 warning (OPT_Wredundant_decls, "redundant redeclaration of %qD in same scope", newdecl);
1593 warning (OPT_Wredundant_decls, "previous declaration of %q+D", olddecl);
1597 /* Deal with C++: must preserve virtual function table size. */
1598 if (TREE_CODE (olddecl) == TYPE_DECL)
1600 tree newtype = TREE_TYPE (newdecl);
1601 tree oldtype = TREE_TYPE (olddecl);
1603 if (newtype != error_mark_node && oldtype != error_mark_node
1604 && TYPE_LANG_SPECIFIC (newtype) && TYPE_LANG_SPECIFIC (oldtype))
1605 CLASSTYPE_FRIEND_CLASSES (newtype)
1606 = CLASSTYPE_FRIEND_CLASSES (oldtype);
1608 DECL_ORIGINAL_TYPE (newdecl) = DECL_ORIGINAL_TYPE (olddecl);
1611 /* Copy all the DECL_... slots specified in the new decl
1612 except for any that we copy here from the old type. */
1613 DECL_ATTRIBUTES (newdecl)
1614 = (*targetm.merge_decl_attributes) (olddecl, newdecl);
1616 if (TREE_CODE (newdecl) == TEMPLATE_DECL)
1620 old_result = DECL_TEMPLATE_RESULT (olddecl);
1621 new_result = DECL_TEMPLATE_RESULT (newdecl);
1622 TREE_TYPE (olddecl) = TREE_TYPE (old_result);
1623 DECL_TEMPLATE_SPECIALIZATIONS (olddecl)
1624 = chainon (DECL_TEMPLATE_SPECIALIZATIONS (olddecl),
1625 DECL_TEMPLATE_SPECIALIZATIONS (newdecl));
1627 if (DECL_FUNCTION_TEMPLATE_P (newdecl))
1629 DECL_INLINE (old_result)
1630 |= DECL_INLINE (new_result);
1631 DECL_DECLARED_INLINE_P (old_result)
1632 |= DECL_DECLARED_INLINE_P (new_result);
1633 check_redeclaration_exception_specification (newdecl, olddecl);
1636 /* If the new declaration is a definition, update the file and
1637 line information on the declaration. */
1638 if (DECL_INITIAL (old_result) == NULL_TREE
1639 && DECL_INITIAL (new_result) != NULL_TREE)
1641 DECL_SOURCE_LOCATION (olddecl)
1642 = DECL_SOURCE_LOCATION (old_result)
1643 = DECL_SOURCE_LOCATION (newdecl);
1644 if (DECL_FUNCTION_TEMPLATE_P (newdecl))
1645 DECL_ARGUMENTS (old_result)
1646 = DECL_ARGUMENTS (new_result);
1654 /* Automatically handles default parameters. */
1655 tree oldtype = TREE_TYPE (olddecl);
1658 /* Merge the data types specified in the two decls. */
1659 newtype = merge_types (TREE_TYPE (newdecl), TREE_TYPE (olddecl));
1661 /* If merge_types produces a non-typedef type, just use the old type. */
1662 if (TREE_CODE (newdecl) == TYPE_DECL
1663 && newtype == DECL_ORIGINAL_TYPE (newdecl))
1666 if (TREE_CODE (newdecl) == VAR_DECL)
1668 DECL_THIS_EXTERN (newdecl) |= DECL_THIS_EXTERN (olddecl);
1669 DECL_INITIALIZED_P (newdecl) |= DECL_INITIALIZED_P (olddecl);
1670 DECL_NONTRIVIALLY_INITIALIZED_P (newdecl)
1671 |= DECL_NONTRIVIALLY_INITIALIZED_P (olddecl);
1672 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (newdecl)
1673 |= DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (olddecl);
1675 /* Merge the threadprivate attribute from OLDDECL into NEWDECL. */
1676 if (DECL_LANG_SPECIFIC (olddecl)
1677 && CP_DECL_THREADPRIVATE_P (olddecl))
1679 /* Allocate a LANG_SPECIFIC structure for NEWDECL, if needed. */
1680 if (!DECL_LANG_SPECIFIC (newdecl))
1681 retrofit_lang_decl (newdecl);
1683 DECL_TLS_MODEL (newdecl) = DECL_TLS_MODEL (olddecl);
1684 CP_DECL_THREADPRIVATE_P (newdecl) = 1;
1688 /* Do this after calling `merge_types' so that default
1689 parameters don't confuse us. */
1690 else if (TREE_CODE (newdecl) == FUNCTION_DECL)
1691 check_redeclaration_exception_specification (newdecl, olddecl);
1692 TREE_TYPE (newdecl) = TREE_TYPE (olddecl) = newtype;
1694 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1695 check_default_args (newdecl);
1697 /* Lay the type out, unless already done. */
1698 if (! same_type_p (newtype, oldtype)
1699 && TREE_TYPE (newdecl) != error_mark_node
1700 && !(processing_template_decl && uses_template_parms (newdecl)))
1701 layout_type (TREE_TYPE (newdecl));
1703 if ((TREE_CODE (newdecl) == VAR_DECL
1704 || TREE_CODE (newdecl) == PARM_DECL
1705 || TREE_CODE (newdecl) == RESULT_DECL
1706 || TREE_CODE (newdecl) == FIELD_DECL
1707 || TREE_CODE (newdecl) == TYPE_DECL)
1708 && !(processing_template_decl && uses_template_parms (newdecl)))
1709 layout_decl (newdecl, 0);
1711 /* Merge the type qualifiers. */
1712 if (TREE_READONLY (newdecl))
1713 TREE_READONLY (olddecl) = 1;
1714 if (TREE_THIS_VOLATILE (newdecl))
1715 TREE_THIS_VOLATILE (olddecl) = 1;
1716 if (TREE_NOTHROW (newdecl))
1717 TREE_NOTHROW (olddecl) = 1;
1719 /* Merge deprecatedness. */
1720 if (TREE_DEPRECATED (newdecl))
1721 TREE_DEPRECATED (olddecl) = 1;
1723 /* Merge the initialization information. */
1724 if (DECL_INITIAL (newdecl) == NULL_TREE
1725 && DECL_INITIAL (olddecl) != NULL_TREE)
1727 DECL_INITIAL (newdecl) = DECL_INITIAL (olddecl);
1728 DECL_SOURCE_LOCATION (newdecl) = DECL_SOURCE_LOCATION (olddecl);
1729 if (CAN_HAVE_FULL_LANG_DECL_P (newdecl)
1730 && DECL_LANG_SPECIFIC (newdecl)
1731 && DECL_LANG_SPECIFIC (olddecl))
1733 DECL_SAVED_TREE (newdecl) = DECL_SAVED_TREE (olddecl);
1734 DECL_STRUCT_FUNCTION (newdecl) = DECL_STRUCT_FUNCTION (olddecl);
1738 /* Merge the section attribute.
1739 We want to issue an error if the sections conflict but that must be
1740 done later in decl_attributes since we are called before attributes
1742 if (DECL_SECTION_NAME (newdecl) == NULL_TREE)
1743 DECL_SECTION_NAME (newdecl) = DECL_SECTION_NAME (olddecl);
1745 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1747 DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (newdecl)
1748 |= DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (olddecl);
1749 DECL_NO_LIMIT_STACK (newdecl) |= DECL_NO_LIMIT_STACK (olddecl);
1750 TREE_THIS_VOLATILE (newdecl) |= TREE_THIS_VOLATILE (olddecl);
1751 TREE_READONLY (newdecl) |= TREE_READONLY (olddecl);
1752 TREE_NOTHROW (newdecl) |= TREE_NOTHROW (olddecl);
1753 DECL_IS_MALLOC (newdecl) |= DECL_IS_MALLOC (olddecl);
1754 DECL_IS_PURE (newdecl) |= DECL_IS_PURE (olddecl);
1755 /* Keep the old RTL. */
1756 COPY_DECL_RTL (olddecl, newdecl);
1758 else if (TREE_CODE (newdecl) == VAR_DECL
1759 && (DECL_SIZE (olddecl) || !DECL_SIZE (newdecl)))
1761 /* Keep the old RTL. We cannot keep the old RTL if the old
1762 declaration was for an incomplete object and the new
1763 declaration is not since many attributes of the RTL will
1765 COPY_DECL_RTL (olddecl, newdecl);
1768 /* If cannot merge, then use the new type and qualifiers,
1769 and don't preserve the old rtl. */
1772 /* Clean out any memory we had of the old declaration. */
1773 tree oldstatic = value_member (olddecl, static_aggregates);
1775 TREE_VALUE (oldstatic) = error_mark_node;
1777 TREE_TYPE (olddecl) = TREE_TYPE (newdecl);
1778 TREE_READONLY (olddecl) = TREE_READONLY (newdecl);
1779 TREE_THIS_VOLATILE (olddecl) = TREE_THIS_VOLATILE (newdecl);
1780 TREE_SIDE_EFFECTS (olddecl) = TREE_SIDE_EFFECTS (newdecl);
1783 /* Merge the storage class information. */
1784 merge_weak (newdecl, olddecl);
1786 DECL_ONE_ONLY (newdecl) |= DECL_ONE_ONLY (olddecl);
1787 DECL_DEFER_OUTPUT (newdecl) |= DECL_DEFER_OUTPUT (olddecl);
1788 TREE_PUBLIC (newdecl) = TREE_PUBLIC (olddecl);
1789 TREE_STATIC (olddecl) = TREE_STATIC (newdecl) |= TREE_STATIC (olddecl);
1790 if (! DECL_EXTERNAL (olddecl))
1791 DECL_EXTERNAL (newdecl) = 0;
1793 new_template = NULL_TREE;
1794 if (DECL_LANG_SPECIFIC (newdecl) && DECL_LANG_SPECIFIC (olddecl))
1796 DECL_INTERFACE_KNOWN (newdecl) |= DECL_INTERFACE_KNOWN (olddecl);
1797 DECL_NOT_REALLY_EXTERN (newdecl) |= DECL_NOT_REALLY_EXTERN (olddecl);
1798 DECL_COMDAT (newdecl) |= DECL_COMDAT (olddecl);
1799 DECL_TEMPLATE_INSTANTIATED (newdecl)
1800 |= DECL_TEMPLATE_INSTANTIATED (olddecl);
1802 /* If the OLDDECL is an instantiation and/or specialization,
1803 then the NEWDECL must be too. But, it may not yet be marked
1804 as such if the caller has created NEWDECL, but has not yet
1805 figured out that it is a redeclaration. */
1806 if (!DECL_USE_TEMPLATE (newdecl))
1807 DECL_USE_TEMPLATE (newdecl) = DECL_USE_TEMPLATE (olddecl);
1809 /* Don't really know how much of the language-specific
1810 values we should copy from old to new. */
1811 DECL_IN_AGGR_P (newdecl) = DECL_IN_AGGR_P (olddecl);
1812 DECL_LANG_SPECIFIC (newdecl)->decl_flags.u2 =
1813 DECL_LANG_SPECIFIC (olddecl)->decl_flags.u2;
1814 DECL_NONCONVERTING_P (newdecl) = DECL_NONCONVERTING_P (olddecl);
1815 DECL_REPO_AVAILABLE_P (newdecl) = DECL_REPO_AVAILABLE_P (olddecl);
1816 if (DECL_TEMPLATE_INFO (newdecl))
1817 new_template = DECL_TI_TEMPLATE (newdecl);
1818 DECL_TEMPLATE_INFO (newdecl) = DECL_TEMPLATE_INFO (olddecl);
1819 DECL_INITIALIZED_IN_CLASS_P (newdecl)
1820 |= DECL_INITIALIZED_IN_CLASS_P (olddecl);
1821 olddecl_friend = DECL_FRIEND_P (olddecl);
1822 hidden_friend = (DECL_ANTICIPATED (olddecl)
1823 && DECL_HIDDEN_FRIEND_P (olddecl)
1824 && newdecl_is_friend);
1826 /* Only functions have DECL_BEFRIENDING_CLASSES. */
1827 if (TREE_CODE (newdecl) == FUNCTION_DECL
1828 || DECL_FUNCTION_TEMPLATE_P (newdecl))
1830 DECL_BEFRIENDING_CLASSES (newdecl)
1831 = chainon (DECL_BEFRIENDING_CLASSES (newdecl),
1832 DECL_BEFRIENDING_CLASSES (olddecl));
1833 /* DECL_THUNKS is only valid for virtual functions,
1834 otherwise it is a DECL_FRIEND_CONTEXT. */
1835 if (DECL_VIRTUAL_P (newdecl))
1836 DECL_THUNKS (newdecl) = DECL_THUNKS (olddecl);
1840 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1842 if (DECL_TEMPLATE_INSTANTIATION (olddecl)
1843 && !DECL_TEMPLATE_INSTANTIATION (newdecl))
1845 /* If newdecl is not a specialization, then it is not a
1846 template-related function at all. And that means that we
1847 should have exited above, returning 0. */
1848 gcc_assert (DECL_TEMPLATE_SPECIALIZATION (newdecl));
1850 if (TREE_USED (olddecl))
1851 /* From [temp.expl.spec]:
1853 If a template, a member template or the member of a class
1854 template is explicitly specialized then that
1855 specialization shall be declared before the first use of
1856 that specialization that would cause an implicit
1857 instantiation to take place, in every translation unit in
1858 which such a use occurs. */
1859 error ("explicit specialization of %qD after first use",
1862 SET_DECL_TEMPLATE_SPECIALIZATION (olddecl);
1864 /* Don't propagate visibility from the template to the
1865 specialization here. We'll do that in determine_visibility if
1867 DECL_VISIBILITY_SPECIFIED (olddecl) = 0;
1869 /* [temp.expl.spec/14] We don't inline explicit specialization
1870 just because the primary template says so. */
1874 if (DECL_PENDING_INLINE_INFO (newdecl) == 0)
1875 DECL_PENDING_INLINE_INFO (newdecl) = DECL_PENDING_INLINE_INFO (olddecl);
1877 DECL_DECLARED_INLINE_P (newdecl) |= DECL_DECLARED_INLINE_P (olddecl);
1879 /* If either decl says `inline', this fn is inline, unless
1880 its definition was passed already. */
1881 if (DECL_INLINE (newdecl) && DECL_INITIAL (olddecl) == NULL_TREE)
1882 DECL_INLINE (olddecl) = 1;
1883 DECL_INLINE (newdecl) = DECL_INLINE (olddecl);
1885 DECL_UNINLINABLE (newdecl) = DECL_UNINLINABLE (olddecl)
1886 = (DECL_UNINLINABLE (newdecl) || DECL_UNINLINABLE (olddecl));
1889 /* Preserve abstractness on cloned [cd]tors. */
1890 DECL_ABSTRACT (newdecl) = DECL_ABSTRACT (olddecl);
1894 SET_DECL_LANGUAGE (olddecl, DECL_LANGUAGE (newdecl));
1895 COPY_DECL_ASSEMBLER_NAME (newdecl, olddecl);
1896 COPY_DECL_RTL (newdecl, olddecl);
1898 if (! types_match || new_defines_function)
1900 /* These need to be copied so that the names are available.
1901 Note that if the types do match, we'll preserve inline
1902 info and other bits, but if not, we won't. */
1903 DECL_ARGUMENTS (olddecl) = DECL_ARGUMENTS (newdecl);
1904 DECL_RESULT (olddecl) = DECL_RESULT (newdecl);
1906 if (new_defines_function)
1907 /* If defining a function declared with other language
1908 linkage, use the previously declared language linkage. */
1909 SET_DECL_LANGUAGE (newdecl, DECL_LANGUAGE (olddecl));
1910 else if (types_match)
1912 /* If redeclaring a builtin function, and not a definition,
1913 it stays built in. */
1914 if (DECL_BUILT_IN (olddecl))
1916 DECL_BUILT_IN_CLASS (newdecl) = DECL_BUILT_IN_CLASS (olddecl);
1917 DECL_FUNCTION_CODE (newdecl) = DECL_FUNCTION_CODE (olddecl);
1918 /* If we're keeping the built-in definition, keep the rtl,
1919 regardless of declaration matches. */
1920 COPY_DECL_RTL (olddecl, newdecl);
1923 DECL_RESULT (newdecl) = DECL_RESULT (olddecl);
1924 /* Don't clear out the arguments if we're redefining a function. */
1925 if (DECL_ARGUMENTS (olddecl))
1926 DECL_ARGUMENTS (newdecl) = DECL_ARGUMENTS (olddecl);
1929 else if (TREE_CODE (newdecl) == NAMESPACE_DECL)
1930 NAMESPACE_LEVEL (newdecl) = NAMESPACE_LEVEL (olddecl);
1932 /* Now preserve various other info from the definition. */
1933 TREE_ADDRESSABLE (newdecl) = TREE_ADDRESSABLE (olddecl);
1934 TREE_ASM_WRITTEN (newdecl) = TREE_ASM_WRITTEN (olddecl);
1935 DECL_COMMON (newdecl) = DECL_COMMON (olddecl);
1936 COPY_DECL_ASSEMBLER_NAME (olddecl, newdecl);
1938 /* Warn about conflicting visibility specifications. */
1939 if (DECL_VISIBILITY_SPECIFIED (olddecl)
1940 && DECL_VISIBILITY_SPECIFIED (newdecl)
1941 && DECL_VISIBILITY (newdecl) != DECL_VISIBILITY (olddecl))
1943 warning (OPT_Wattributes, "%q+D: visibility attribute ignored "
1944 "because it", newdecl);
1945 warning (OPT_Wattributes, "%Jconflicts with previous "
1946 "declaration here", olddecl);
1948 /* Choose the declaration which specified visibility. */
1949 if (DECL_VISIBILITY_SPECIFIED (olddecl))
1951 DECL_VISIBILITY (newdecl) = DECL_VISIBILITY (olddecl);
1952 DECL_VISIBILITY_SPECIFIED (newdecl) = 1;
1954 /* Init priority used to be merged from newdecl to olddecl by the memcpy,
1955 so keep this behavior. */
1956 if (TREE_CODE (newdecl) == VAR_DECL && DECL_HAS_INIT_PRIORITY_P (newdecl))
1958 SET_DECL_INIT_PRIORITY (olddecl, DECL_INIT_PRIORITY (newdecl));
1959 DECL_HAS_INIT_PRIORITY_P (olddecl) = 1;
1962 /* The DECL_LANG_SPECIFIC information in OLDDECL will be replaced
1963 with that from NEWDECL below. */
1964 if (DECL_LANG_SPECIFIC (olddecl))
1966 gcc_assert (DECL_LANG_SPECIFIC (olddecl)
1967 != DECL_LANG_SPECIFIC (newdecl));
1968 ggc_free (DECL_LANG_SPECIFIC (olddecl));
1971 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1975 function_size = sizeof (struct tree_decl_common);
1977 memcpy ((char *) olddecl + sizeof (struct tree_common),
1978 (char *) newdecl + sizeof (struct tree_common),
1979 function_size - sizeof (struct tree_common));
1981 memcpy ((char *) olddecl + sizeof (struct tree_decl_common),
1982 (char *) newdecl + sizeof (struct tree_decl_common),
1983 sizeof (struct tree_function_decl) - sizeof (struct tree_decl_common));
1985 /* If newdecl is a template instantiation, it is possible that
1986 the following sequence of events has occurred:
1988 o A friend function was declared in a class template. The
1989 class template was instantiated.
1991 o The instantiation of the friend declaration was
1992 recorded on the instantiation list, and is newdecl.
1994 o Later, however, instantiate_class_template called pushdecl
1995 on the newdecl to perform name injection. But, pushdecl in
1996 turn called duplicate_decls when it discovered that another
1997 declaration of a global function with the same name already
2000 o Here, in duplicate_decls, we decided to clobber newdecl.
2002 If we're going to do that, we'd better make sure that
2003 olddecl, and not newdecl, is on the list of
2004 instantiations so that if we try to do the instantiation
2005 again we won't get the clobbered declaration. */
2006 reregister_specialization (newdecl,
2012 size_t size = tree_code_size (TREE_CODE (olddecl));
2013 memcpy ((char *) olddecl + sizeof (struct tree_common),
2014 (char *) newdecl + sizeof (struct tree_common),
2015 sizeof (struct tree_decl_common) - sizeof (struct tree_common));
2016 switch (TREE_CODE (olddecl))
2026 memcpy ((char *) olddecl + sizeof (struct tree_decl_common),
2027 (char *) newdecl + sizeof (struct tree_decl_common),
2028 size - sizeof (struct tree_decl_common)
2029 + TREE_CODE_LENGTH (TREE_CODE (newdecl)) * sizeof (char *));
2033 memcpy ((char *) olddecl + sizeof (struct tree_decl_common),
2034 (char *) newdecl + sizeof (struct tree_decl_common),
2035 sizeof (struct tree_decl_non_common) - sizeof (struct tree_decl_common)
2036 + TREE_CODE_LENGTH (TREE_CODE (newdecl)) * sizeof (char *));
2040 DECL_UID (olddecl) = olddecl_uid;
2042 DECL_FRIEND_P (olddecl) = 1;
2045 DECL_ANTICIPATED (olddecl) = 1;
2046 DECL_HIDDEN_FRIEND_P (olddecl) = 1;
2049 /* NEWDECL contains the merged attribute lists.
2050 Update OLDDECL to be the same. */
2051 DECL_ATTRIBUTES (olddecl) = DECL_ATTRIBUTES (newdecl);
2053 /* If OLDDECL had its DECL_RTL instantiated, re-invoke make_decl_rtl
2054 so that encode_section_info has a chance to look at the new decl
2055 flags and attributes. */
2056 if (DECL_RTL_SET_P (olddecl)
2057 && (TREE_CODE (olddecl) == FUNCTION_DECL
2058 || (TREE_CODE (olddecl) == VAR_DECL
2059 && TREE_STATIC (olddecl))))
2060 make_decl_rtl (olddecl);
2062 /* The NEWDECL will no longer be needed. Because every out-of-class
2063 declaration of a member results in a call to duplicate_decls,
2064 freeing these nodes represents in a significant savings. */
2070 /* Return zero if the declaration NEWDECL is valid
2071 when the declaration OLDDECL (assumed to be for the same name)
2072 has already been seen.
2073 Otherwise return an error message format string with a %s
2074 where the identifier should go. */
2077 redeclaration_error_message (tree newdecl, tree olddecl)
2079 if (TREE_CODE (newdecl) == TYPE_DECL)
2081 /* Because C++ can put things into name space for free,
2082 constructs like "typedef struct foo { ... } foo"
2083 would look like an erroneous redeclaration. */
2084 if (same_type_p (TREE_TYPE (newdecl), TREE_TYPE (olddecl)))
2087 return "redefinition of %q#D";
2089 else if (TREE_CODE (newdecl) == FUNCTION_DECL)
2091 /* If this is a pure function, its olddecl will actually be
2092 the original initialization to `0' (which we force to call
2093 abort()). Don't complain about redefinition in this case. */
2094 if (DECL_LANG_SPECIFIC (olddecl) && DECL_PURE_VIRTUAL_P (olddecl)
2095 && DECL_INITIAL (olddecl) == NULL_TREE)
2098 /* If both functions come from different namespaces, this is not
2099 a redeclaration - this is a conflict with a used function. */
2100 if (DECL_NAMESPACE_SCOPE_P (olddecl)
2101 && DECL_CONTEXT (olddecl) != DECL_CONTEXT (newdecl)
2102 && ! decls_match (olddecl, newdecl))
2103 return "%qD conflicts with used function";
2105 /* We'll complain about linkage mismatches in
2106 warn_extern_redeclared_static. */
2108 /* Defining the same name twice is no good. */
2109 if (DECL_INITIAL (olddecl) != NULL_TREE
2110 && DECL_INITIAL (newdecl) != NULL_TREE)
2112 if (DECL_NAME (olddecl) == NULL_TREE)
2113 return "%q#D not declared in class";
2115 return "redefinition of %q#D";
2119 else if (TREE_CODE (newdecl) == TEMPLATE_DECL)
2123 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == TYPE_DECL)
2125 if (COMPLETE_TYPE_P (TREE_TYPE (newdecl))
2126 && COMPLETE_TYPE_P (TREE_TYPE (olddecl)))
2127 return "redefinition of %q#D";
2131 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) != FUNCTION_DECL
2132 || (DECL_TEMPLATE_RESULT (newdecl)
2133 == DECL_TEMPLATE_RESULT (olddecl)))
2136 nt = DECL_TEMPLATE_RESULT (newdecl);
2137 if (DECL_TEMPLATE_INFO (nt))
2138 nt = DECL_TEMPLATE_RESULT (template_for_substitution (nt));
2139 ot = DECL_TEMPLATE_RESULT (olddecl);
2140 if (DECL_TEMPLATE_INFO (ot))
2141 ot = DECL_TEMPLATE_RESULT (template_for_substitution (ot));
2142 if (DECL_INITIAL (nt) && DECL_INITIAL (ot))
2143 return "redefinition of %q#D";
2147 else if (TREE_CODE (newdecl) == VAR_DECL
2148 && DECL_THREAD_LOCAL_P (newdecl) != DECL_THREAD_LOCAL_P (olddecl)
2149 && (! DECL_LANG_SPECIFIC (olddecl)
2150 || ! CP_DECL_THREADPRIVATE_P (olddecl)
2151 || DECL_THREAD_LOCAL_P (newdecl)))
2153 /* Only variables can be thread-local, and all declarations must
2154 agree on this property. */
2155 if (DECL_THREAD_LOCAL_P (newdecl))
2156 return "thread-local declaration of %q#D follows "
2157 "non-thread-local declaration";
2159 return "non-thread-local declaration of %q#D follows "
2160 "thread-local declaration";
2162 else if (toplevel_bindings_p () || DECL_NAMESPACE_SCOPE_P (newdecl))
2164 /* Objects declared at top level: */
2165 /* If at least one is a reference, it's ok. */
2166 if (DECL_EXTERNAL (newdecl) || DECL_EXTERNAL (olddecl))
2168 /* Reject two definitions. */
2169 return "redefinition of %q#D";
2173 /* Objects declared with block scope: */
2174 /* Reject two definitions, and reject a definition
2175 together with an external reference. */
2176 if (!(DECL_EXTERNAL (newdecl) && DECL_EXTERNAL (olddecl)))
2177 return "redeclaration of %q#D";
2182 /* Hash and equality functions for the named_label table. */
2185 named_label_entry_hash (const void *data)
2187 const struct named_label_entry *ent = (const struct named_label_entry *) data;
2188 return DECL_UID (ent->label_decl);
2192 named_label_entry_eq (const void *a, const void *b)
2194 const struct named_label_entry *ent_a = (const struct named_label_entry *) a;
2195 const struct named_label_entry *ent_b = (const struct named_label_entry *) b;
2196 return ent_a->label_decl == ent_b->label_decl;
2199 /* Create a new label, named ID. */
2202 make_label_decl (tree id, int local_p)
2204 struct named_label_entry *ent;
2208 decl = build_decl (LABEL_DECL, id, void_type_node);
2210 DECL_CONTEXT (decl) = current_function_decl;
2211 DECL_MODE (decl) = VOIDmode;
2212 C_DECLARED_LABEL_FLAG (decl) = local_p;
2214 /* Say where one reference is to the label, for the sake of the
2215 error if it is not defined. */
2216 DECL_SOURCE_LOCATION (decl) = input_location;
2218 /* Record the fact that this identifier is bound to this label. */
2219 SET_IDENTIFIER_LABEL_VALUE (id, decl);
2221 /* Create the label htab for the function on demand. */
2223 named_labels = htab_create_ggc (13, named_label_entry_hash,
2224 named_label_entry_eq, NULL);
2226 /* Record this label on the list of labels used in this function.
2227 We do this before calling make_label_decl so that we get the
2228 IDENTIFIER_LABEL_VALUE before the new label is declared. */
2229 ent = GGC_CNEW (struct named_label_entry);
2230 ent->label_decl = decl;
2232 slot = htab_find_slot (named_labels, ent, INSERT);
2233 gcc_assert (*slot == NULL);
2239 /* Look for a label named ID in the current function. If one cannot
2240 be found, create one. (We keep track of used, but undefined,
2241 labels, and complain about them at the end of a function.) */
2244 lookup_label (tree id)
2248 timevar_push (TV_NAME_LOOKUP);
2249 /* You can't use labels at global scope. */
2250 if (current_function_decl == NULL_TREE)
2252 error ("label %qE referenced outside of any function", id);
2253 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, NULL_TREE);
2256 /* See if we've already got this label. */
2257 decl = IDENTIFIER_LABEL_VALUE (id);
2258 if (decl != NULL_TREE && DECL_CONTEXT (decl) == current_function_decl)
2259 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, decl);
2261 decl = make_label_decl (id, /*local_p=*/0);
2262 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, decl);
2265 /* Declare a local label named ID. */
2268 declare_local_label (tree id)
2272 /* Add a new entry to the SHADOWED_LABELS list so that when we leave
2273 this scope we can restore the old value of IDENTIFIER_TYPE_VALUE. */
2274 shadow = tree_cons (IDENTIFIER_LABEL_VALUE (id), NULL_TREE,
2275 current_binding_level->shadowed_labels);
2276 current_binding_level->shadowed_labels = shadow;
2278 decl = make_label_decl (id, /*local_p=*/1);
2279 TREE_VALUE (shadow) = decl;
2284 /* Returns nonzero if it is ill-formed to jump past the declaration of
2285 DECL. Returns 2 if it's also a real problem. */
2288 decl_jump_unsafe (tree decl)
2290 if (TREE_CODE (decl) != VAR_DECL || TREE_STATIC (decl)
2291 || TREE_TYPE (decl) == error_mark_node)
2294 if (TYPE_NEEDS_CONSTRUCTING (TREE_TYPE (decl))
2295 || DECL_NONTRIVIALLY_INITIALIZED_P (decl))
2298 if (pod_type_p (TREE_TYPE (decl)))
2301 /* The POD stuff is just pedantry; why should it matter if the class
2302 contains a field of pointer to member type? */
2306 /* A subroutine of check_previous_goto_1 to identify a branch to the user. */
2309 identify_goto (tree decl, const location_t *locus)
2312 pedwarn ("jump to label %qD", decl);
2314 pedwarn ("jump to case label");
2316 pedwarn ("%H from here", locus);
2319 /* Check that a single previously seen jump to a newly defined label
2320 is OK. DECL is the LABEL_DECL or 0; LEVEL is the binding_level for
2321 the jump context; NAMES are the names in scope in LEVEL at the jump
2322 context; LOCUS is the source position of the jump or 0. Returns
2323 true if all is well. */
2326 check_previous_goto_1 (tree decl, struct cp_binding_level* level, tree names,
2327 bool exited_omp, const location_t *locus)
2329 struct cp_binding_level *b;
2330 bool identified = false, saw_eh = false, saw_omp = false;
2334 identify_goto (decl, locus);
2335 error (" exits OpenMP structured block");
2336 identified = saw_omp = true;
2339 for (b = current_binding_level; b ; b = b->level_chain)
2341 tree new_decls, old_decls = (b == level ? names : NULL_TREE);
2343 for (new_decls = b->names; new_decls != old_decls;
2344 new_decls = TREE_CHAIN (new_decls))
2346 int problem = decl_jump_unsafe (new_decls);
2352 identify_goto (decl, locus);
2356 error (" crosses initialization of %q+#D", new_decls);
2358 pedwarn (" enters scope of non-POD %q+#D", new_decls);
2363 if ((b->kind == sk_try || b->kind == sk_catch) && !saw_eh)
2367 identify_goto (decl, locus);
2370 if (b->kind == sk_try)
2371 error (" enters try block");
2373 error (" enters catch block");
2376 if (b->kind == sk_omp && !saw_omp)
2380 identify_goto (decl, locus);
2383 error (" enters OpenMP structured block");
2392 check_previous_goto (tree decl, struct named_label_use_entry *use)
2394 check_previous_goto_1 (decl, use->binding_level,
2395 use->names_in_scope, use->in_omp_scope,
2396 &use->o_goto_locus);
2400 check_switch_goto (struct cp_binding_level* level)
2402 return check_previous_goto_1 (NULL_TREE, level, level->names, false, NULL);
2405 /* Check that a new jump to a label DECL is OK. Called by
2406 finish_goto_stmt. */
2409 check_goto (tree decl)
2411 struct named_label_entry *ent, dummy;
2412 bool saw_catch = false, identified = false;
2415 /* We can't know where a computed goto is jumping.
2416 So we assume that it's OK. */
2417 if (TREE_CODE (decl) != LABEL_DECL)
2420 /* We didn't record any information about this label when we created it,
2421 and there's not much point since it's trivial to analyze as a return. */
2422 if (decl == cdtor_label)
2425 dummy.label_decl = decl;
2426 ent = (struct named_label_entry *) htab_find (named_labels, &dummy);
2427 gcc_assert (ent != NULL);
2429 /* If the label hasn't been defined yet, defer checking. */
2430 if (! DECL_INITIAL (decl))
2432 struct named_label_use_entry *new_use;
2434 /* Don't bother creating another use if the last goto had the
2435 same data, and will therefore create the same set of errors. */
2437 && ent->uses->names_in_scope == current_binding_level->names)
2440 new_use = GGC_NEW (struct named_label_use_entry);
2441 new_use->binding_level = current_binding_level;
2442 new_use->names_in_scope = current_binding_level->names;
2443 new_use->o_goto_locus = input_location;
2444 new_use->in_omp_scope = false;
2446 new_use->next = ent->uses;
2447 ent->uses = new_use;
2451 if (ent->in_try_scope || ent->in_catch_scope
2452 || ent->in_omp_scope || ent->bad_decls)
2454 pedwarn ("jump to label %q+D", decl);
2455 pedwarn (" from here");
2459 for (bad = ent->bad_decls; bad; bad = TREE_CHAIN (bad))
2461 tree b = TREE_VALUE (bad);
2462 int u = decl_jump_unsafe (b);
2464 if (u > 1 && DECL_ARTIFICIAL (b))
2466 /* Can't skip init of __exception_info. */
2467 error ("%J enters catch block", b);
2471 error (" skips initialization of %q+#D", b);
2473 pedwarn (" enters scope of non-POD %q+#D", b);
2476 if (ent->in_try_scope)
2477 error (" enters try block");
2478 else if (ent->in_catch_scope && !saw_catch)
2479 error (" enters catch block");
2481 if (ent->in_omp_scope)
2482 error (" enters OpenMP structured block");
2483 else if (flag_openmp)
2485 struct cp_binding_level *b;
2486 for (b = current_binding_level; b ; b = b->level_chain)
2488 if (b == ent->binding_level)
2490 if (b->kind == sk_omp)
2494 pedwarn ("jump to label %q+D", decl);
2495 pedwarn (" from here");
2498 error (" exits OpenMP structured block");
2505 /* Check that a return is ok wrt OpenMP structured blocks.
2506 Called by finish_return_stmt. Returns true if all is well. */
2509 check_omp_return (void)
2511 struct cp_binding_level *b;
2512 for (b = current_binding_level; b ; b = b->level_chain)
2513 if (b->kind == sk_omp)
2515 error ("invalid exit from OpenMP structured block");
2521 /* Define a label, specifying the location in the source file.
2522 Return the LABEL_DECL node for the label. */
2525 define_label (location_t location, tree name)
2527 struct named_label_entry *ent, dummy;
2528 struct cp_binding_level *p;
2531 timevar_push (TV_NAME_LOOKUP);
2533 decl = lookup_label (name);
2535 dummy.label_decl = decl;
2536 ent = (struct named_label_entry *) htab_find (named_labels, &dummy);
2537 gcc_assert (ent != NULL);
2539 /* After labels, make any new cleanups in the function go into their
2540 own new (temporary) binding contour. */
2541 for (p = current_binding_level;
2542 p->kind != sk_function_parms;
2544 p->more_cleanups_ok = 0;
2546 if (name == get_identifier ("wchar_t"))
2547 pedwarn ("label named wchar_t");
2549 if (DECL_INITIAL (decl) != NULL_TREE)
2551 error ("duplicate label %qD", decl);
2552 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
2556 struct named_label_use_entry *use;
2558 /* Mark label as having been defined. */
2559 DECL_INITIAL (decl) = error_mark_node;
2560 /* Say where in the source. */
2561 DECL_SOURCE_LOCATION (decl) = location;
2563 ent->binding_level = current_binding_level;
2564 ent->names_in_scope = current_binding_level->names;
2566 for (use = ent->uses; use ; use = use->next)
2567 check_previous_goto (decl, use);
2571 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, decl);
2576 struct cp_binding_level *level;
2577 struct cp_switch *next;
2578 /* The SWITCH_STMT being built. */
2580 /* A splay-tree mapping the low element of a case range to the high
2581 element, or NULL_TREE if there is no high element. Used to
2582 determine whether or not a new case label duplicates an old case
2583 label. We need a tree, rather than simply a hash table, because
2584 of the GNU case range extension. */
2588 /* A stack of the currently active switch statements. The innermost
2589 switch statement is on the top of the stack. There is no need to
2590 mark the stack for garbage collection because it is only active
2591 during the processing of the body of a function, and we never
2592 collect at that point. */
2594 static struct cp_switch *switch_stack;
2596 /* Called right after a switch-statement condition is parsed.
2597 SWITCH_STMT is the switch statement being parsed. */
2600 push_switch (tree switch_stmt)
2602 struct cp_switch *p = XNEW (struct cp_switch);
2603 p->level = current_binding_level;
2604 p->next = switch_stack;
2605 p->switch_stmt = switch_stmt;
2606 p->cases = splay_tree_new (case_compare, NULL, NULL);
2613 struct cp_switch *cs = switch_stack;
2614 location_t switch_location;
2616 /* Emit warnings as needed. */
2617 if (EXPR_HAS_LOCATION (cs->switch_stmt))
2618 switch_location = EXPR_LOCATION (cs->switch_stmt);
2620 switch_location = input_location;
2621 if (!processing_template_decl)
2622 c_do_switch_warnings (cs->cases, switch_location,
2623 SWITCH_STMT_TYPE (cs->switch_stmt),
2624 SWITCH_STMT_COND (cs->switch_stmt));
2626 splay_tree_delete (cs->cases);
2627 switch_stack = switch_stack->next;
2631 /* Note that we've seen a definition of a case label, and complain if this
2632 is a bad place for one. */
2635 finish_case_label (tree low_value, tree high_value)
2638 struct cp_binding_level *p;
2640 if (processing_template_decl)
2644 /* For templates, just add the case label; we'll do semantic
2645 analysis at instantiation-time. */
2646 label = build_decl (LABEL_DECL, NULL_TREE, NULL_TREE);
2647 return add_stmt (build_case_label (low_value, high_value, label));
2650 /* Find the condition on which this switch statement depends. */
2651 cond = SWITCH_STMT_COND (switch_stack->switch_stmt);
2652 if (cond && TREE_CODE (cond) == TREE_LIST)
2653 cond = TREE_VALUE (cond);
2655 if (!check_switch_goto (switch_stack->level))
2656 return error_mark_node;
2658 r = c_add_case_label (switch_stack->cases, cond, TREE_TYPE (cond),
2659 low_value, high_value);
2661 /* After labels, make any new cleanups in the function go into their
2662 own new (temporary) binding contour. */
2663 for (p = current_binding_level;
2664 p->kind != sk_function_parms;
2666 p->more_cleanups_ok = 0;
2671 /* Hash a TYPENAME_TYPE. K is really of type `tree'. */
2674 typename_hash (const void* k)
2679 hash = (htab_hash_pointer (TYPE_CONTEXT (t))
2680 ^ htab_hash_pointer (DECL_NAME (TYPE_NAME (t))));
2685 typedef struct typename_info {
2693 /* Compare two TYPENAME_TYPEs. K1 and K2 are really of type `tree'. */
2696 typename_compare (const void * k1, const void * k2)
2699 const typename_info *t2;
2702 t2 = (const typename_info *) k2;
2704 return (DECL_NAME (TYPE_NAME (t1)) == t2->name
2705 && TYPE_CONTEXT (t1) == t2->scope
2706 && TYPENAME_TYPE_FULLNAME (t1) == t2->template_id
2707 && TYPENAME_IS_ENUM_P (t1) == t2->enum_p
2708 && TYPENAME_IS_CLASS_P (t1) == t2->class_p);
2711 /* Build a TYPENAME_TYPE. If the type is `typename T::t', CONTEXT is
2712 the type of `T', NAME is the IDENTIFIER_NODE for `t'.
2714 Returns the new TYPENAME_TYPE. */
2716 static GTY ((param_is (union tree_node))) htab_t typename_htab;
2719 build_typename_type (tree context, tree name, tree fullname,
2720 enum tag_types tag_type)
2728 if (typename_htab == NULL)
2729 typename_htab = htab_create_ggc (61, &typename_hash,
2730 &typename_compare, NULL);
2732 ti.scope = FROB_CONTEXT (context);
2734 ti.template_id = fullname;
2735 ti.enum_p = tag_type == enum_type;
2736 ti.class_p = (tag_type == class_type
2737 || tag_type == record_type
2738 || tag_type == union_type);
2739 hash = (htab_hash_pointer (ti.scope)
2740 ^ htab_hash_pointer (ti.name));
2742 /* See if we already have this type. */
2743 e = htab_find_slot_with_hash (typename_htab, &ti, hash, INSERT);
2748 /* Build the TYPENAME_TYPE. */
2749 t = make_aggr_type (TYPENAME_TYPE);
2750 TYPE_CONTEXT (t) = ti.scope;
2751 TYPENAME_TYPE_FULLNAME (t) = ti.template_id;
2752 TYPENAME_IS_ENUM_P (t) = ti.enum_p;
2753 TYPENAME_IS_CLASS_P (t) = ti.class_p;
2755 /* Build the corresponding TYPE_DECL. */
2756 d = build_decl (TYPE_DECL, name, t);
2757 TYPE_NAME (TREE_TYPE (d)) = d;
2758 TYPE_STUB_DECL (TREE_TYPE (d)) = d;
2759 DECL_CONTEXT (d) = FROB_CONTEXT (context);
2760 DECL_ARTIFICIAL (d) = 1;
2762 /* Store it in the hash table. */
2769 /* Resolve `typename CONTEXT::NAME'. TAG_TYPE indicates the tag
2770 provided to name the type. Returns an appropriate type, unless an
2771 error occurs, in which case error_mark_node is returned. If we
2772 locate a non-artificial TYPE_DECL and TF_KEEP_TYPE_DECL is set, we
2773 return that, rather than the _TYPE it corresponds to, in other
2774 cases we look through the type decl. If TF_ERROR is set, complain
2775 about errors, otherwise be quiet. */
2778 make_typename_type (tree context, tree name, enum tag_types tag_type,
2779 tsubst_flags_t complain)
2785 if (name == error_mark_node
2786 || context == NULL_TREE
2787 || context == error_mark_node)
2788 return error_mark_node;
2792 if (!(TYPE_LANG_SPECIFIC (name)
2793 && (CLASSTYPE_IS_TEMPLATE (name)
2794 || CLASSTYPE_USE_TEMPLATE (name))))
2795 name = TYPE_IDENTIFIER (name);
2797 /* Create a TEMPLATE_ID_EXPR for the type. */
2798 name = build_nt (TEMPLATE_ID_EXPR,
2799 CLASSTYPE_TI_TEMPLATE (name),
2800 CLASSTYPE_TI_ARGS (name));
2802 else if (TREE_CODE (name) == TYPE_DECL)
2803 name = DECL_NAME (name);
2807 if (TREE_CODE (name) == TEMPLATE_ID_EXPR)
2809 name = TREE_OPERAND (name, 0);
2810 if (TREE_CODE (name) == TEMPLATE_DECL)
2811 name = TREE_OPERAND (fullname, 0) = DECL_NAME (name);
2813 if (TREE_CODE (name) == TEMPLATE_DECL)
2815 error ("%qD used without template parameters", name);
2816 return error_mark_node;
2818 gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE);
2819 gcc_assert (TYPE_P (context));
2821 /* When the CONTEXT is a dependent type, NAME could refer to a
2822 dependent base class of CONTEXT. So we cannot peek inside it,
2823 even if CONTEXT is a currently open scope. */
2824 if (dependent_type_p (context))
2825 return build_typename_type (context, name, fullname, tag_type);
2827 if (!IS_AGGR_TYPE (context))
2829 if (complain & tf_error)
2830 error ("%q#T is not a class", context);
2831 return error_mark_node;
2834 want_template = TREE_CODE (fullname) == TEMPLATE_ID_EXPR;
2836 /* We should only set WANT_TYPE when we're a nested typename type.
2837 Then we can give better diagnostics if we find a non-type. */
2838 t = lookup_field (context, name, 0, /*want_type=*/true);
2841 if (complain & tf_error)
2842 error (want_template ? "no class template named %q#T in %q#T"
2843 : "no type named %q#T in %q#T", name, context);
2844 return error_mark_node;
2847 if (want_template && !DECL_CLASS_TEMPLATE_P (t))
2849 if (complain & tf_error)
2850 error ("%<typename %T::%D%> names %q#T, which is not a class template",
2852 return error_mark_node;
2854 if (!want_template && TREE_CODE (t) != TYPE_DECL)
2856 if (complain & tf_error)
2857 error ("%<typename %T::%D%> names %q#T, which is not a type",
2859 return error_mark_node;
2862 if (complain & tf_error)
2863 perform_or_defer_access_check (TYPE_BINFO (context), t);
2866 return lookup_template_class (t, TREE_OPERAND (fullname, 1),
2868 /*entering_scope=*/0,
2869 tf_warning_or_error | tf_user);
2871 if (DECL_ARTIFICIAL (t) || !(complain & tf_keep_type_decl))
2877 /* Resolve `CONTEXT::template NAME'. Returns a TEMPLATE_DECL if the name
2878 can be resolved or an UNBOUND_CLASS_TEMPLATE, unless an error occurs,
2879 in which case error_mark_node is returned.
2881 If PARM_LIST is non-NULL, also make sure that the template parameter
2882 list of TEMPLATE_DECL matches.
2884 If COMPLAIN zero, don't complain about any errors that occur. */
2887 make_unbound_class_template (tree context, tree name, tree parm_list,
2888 tsubst_flags_t complain)
2894 name = TYPE_IDENTIFIER (name);
2895 else if (DECL_P (name))
2896 name = DECL_NAME (name);
2897 gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE);
2899 if (!dependent_type_p (context)
2900 || currently_open_class (context))
2902 tree tmpl = NULL_TREE;
2904 if (IS_AGGR_TYPE (context))
2905 tmpl = lookup_field (context, name, 0, false);
2907 if (!tmpl || !DECL_CLASS_TEMPLATE_P (tmpl))
2909 if (complain & tf_error)
2910 error ("no class template named %q#T in %q#T", name, context);
2911 return error_mark_node;
2915 && !comp_template_parms (DECL_TEMPLATE_PARMS (tmpl), parm_list))
2917 if (complain & tf_error)
2919 error ("template parameters do not match template");
2920 error ("%q+D declared here", tmpl);
2922 return error_mark_node;
2925 if (complain & tf_error)
2926 perform_or_defer_access_check (TYPE_BINFO (context), tmpl);
2931 /* Build the UNBOUND_CLASS_TEMPLATE. */
2932 t = make_aggr_type (UNBOUND_CLASS_TEMPLATE);
2933 TYPE_CONTEXT (t) = FROB_CONTEXT (context);
2934 TREE_TYPE (t) = NULL_TREE;
2936 /* Build the corresponding TEMPLATE_DECL. */
2937 d = build_decl (TEMPLATE_DECL, name, t);
2938 TYPE_NAME (TREE_TYPE (d)) = d;
2939 TYPE_STUB_DECL (TREE_TYPE (d)) = d;
2940 DECL_CONTEXT (d) = FROB_CONTEXT (context);
2941 DECL_ARTIFICIAL (d) = 1;
2942 DECL_TEMPLATE_PARMS (d) = parm_list;
2949 /* Push the declarations of builtin types into the namespace.
2950 RID_INDEX is the index of the builtin type in the array
2951 RID_POINTERS. NAME is the name used when looking up the builtin
2952 type. TYPE is the _TYPE node for the builtin type. */
2955 record_builtin_type (enum rid rid_index,
2959 tree rname = NULL_TREE, tname = NULL_TREE;
2960 tree tdecl = NULL_TREE;
2962 if ((int) rid_index < (int) RID_MAX)
2963 rname = ridpointers[(int) rid_index];
2965 tname = get_identifier (name);
2967 /* The calls to SET_IDENTIFIER_GLOBAL_VALUE below should be
2968 eliminated. Built-in types should not be looked up name; their
2969 names are keywords that the parser can recognize. However, there
2970 is code in c-common.c that uses identifier_global_value to look
2971 up built-in types by name. */
2974 tdecl = build_decl (TYPE_DECL, tname, type);
2975 DECL_ARTIFICIAL (tdecl) = 1;
2976 SET_IDENTIFIER_GLOBAL_VALUE (tname, tdecl);
2982 tdecl = build_decl (TYPE_DECL, rname, type);
2983 DECL_ARTIFICIAL (tdecl) = 1;
2985 SET_IDENTIFIER_GLOBAL_VALUE (rname, tdecl);
2988 if (!TYPE_NAME (type))
2989 TYPE_NAME (type) = tdecl;
2992 debug_hooks->type_decl (tdecl, 0);
2995 /* Record one of the standard Java types.
2996 * Declare it as having the given NAME.
2997 * If SIZE > 0, it is the size of one of the integral types;
2998 * otherwise it is the negative of the size of one of the other types. */
3001 record_builtin_java_type (const char* name, int size)
3005 type = make_signed_type (size);
3006 else if (size > -32)
3007 { /* "__java_char" or ""__java_boolean". */
3008 type = make_unsigned_type (-size);
3009 /*if (size == -1) TREE_SET_CODE (type, BOOLEAN_TYPE);*/
3012 { /* "__java_float" or ""__java_double". */
3013 type = make_node (REAL_TYPE);
3014 TYPE_PRECISION (type) = - size;
3017 record_builtin_type (RID_MAX, name, type);
3018 decl = TYPE_NAME (type);
3020 /* Suppress generate debug symbol entries for these types,
3021 since for normal C++ they are just clutter.
3022 However, push_lang_context undoes this if extern "Java" is seen. */
3023 DECL_IGNORED_P (decl) = 1;
3025 TYPE_FOR_JAVA (type) = 1;
3029 /* Push a type into the namespace so that the back-ends ignore it. */
3032 record_unknown_type (tree type, const char* name)
3034 tree decl = pushdecl (build_decl (TYPE_DECL, get_identifier (name), type));
3035 /* Make sure the "unknown type" typedecl gets ignored for debug info. */
3036 DECL_IGNORED_P (decl) = 1;
3037 TYPE_DECL_SUPPRESS_DEBUG (decl) = 1;
3038 TYPE_SIZE (type) = TYPE_SIZE (void_type_node);
3039 TYPE_ALIGN (type) = 1;
3040 TYPE_USER_ALIGN (type) = 0;
3041 TYPE_MODE (type) = TYPE_MODE (void_type_node);
3044 /* A string for which we should create an IDENTIFIER_NODE at
3047 typedef struct predefined_identifier
3049 /* The name of the identifier. */
3050 const char *const name;
3051 /* The place where the IDENTIFIER_NODE should be stored. */
3053 /* Nonzero if this is the name of a constructor or destructor. */
3054 const int ctor_or_dtor_p;
3055 } predefined_identifier;
3057 /* Create all the predefined identifiers. */
3060 initialize_predefined_identifiers (void)
3062 const predefined_identifier *pid;
3064 /* A table of identifiers to create at startup. */
3065 static const predefined_identifier predefined_identifiers[] = {
3066 { "C++", &lang_name_cplusplus, 0 },
3067 { "C", &lang_name_c, 0 },
3068 { "Java", &lang_name_java, 0 },
3069 /* Some of these names have a trailing space so that it is
3070 impossible for them to conflict with names written by users. */
3071 { "__ct ", &ctor_identifier, 1 },
3072 { "__base_ctor ", &base_ctor_identifier, 1 },
3073 { "__comp_ctor ", &complete_ctor_identifier, 1 },
3074 { "__dt ", &dtor_identifier, 1 },
3075 { "__comp_dtor ", &complete_dtor_identifier, 1 },
3076 { "__base_dtor ", &base_dtor_identifier, 1 },
3077 { "__deleting_dtor ", &deleting_dtor_identifier, 1 },
3078 { IN_CHARGE_NAME, &in_charge_identifier, 0 },
3079 { "nelts", &nelts_identifier, 0 },
3080 { THIS_NAME, &this_identifier, 0 },
3081 { VTABLE_DELTA_NAME, &delta_identifier, 0 },
3082 { VTABLE_PFN_NAME, &pfn_identifier, 0 },
3083 { "_vptr", &vptr_identifier, 0 },
3084 { "__vtt_parm", &vtt_parm_identifier, 0 },
3085 { "::", &global_scope_name, 0 },
3086 { "std", &std_identifier, 0 },
3090 for (pid = predefined_identifiers; pid->name; ++pid)
3092 *pid->node = get_identifier (pid->name);
3093 if (pid->ctor_or_dtor_p)
3094 IDENTIFIER_CTOR_OR_DTOR_P (*pid->node) = 1;
3098 /* Create the predefined scalar types of C,
3099 and some nodes representing standard constants (0, 1, (void *)0).
3100 Initialize the global binding level.
3101 Make definitions for built-in primitive functions. */
3104 cxx_init_decl_processing (void)
3107 tree void_ftype_ptr;
3109 build_common_tree_nodes (flag_signed_char, false);
3111 /* Create all the identifiers we need. */
3112 initialize_predefined_identifiers ();
3114 /* Create the global variables. */
3115 push_to_top_level ();
3117 current_function_decl = NULL_TREE;
3118 current_binding_level = NULL;
3119 /* Enter the global namespace. */
3120 gcc_assert (global_namespace == NULL_TREE);
3121 global_namespace = build_lang_decl (NAMESPACE_DECL, global_scope_name,
3123 TREE_PUBLIC (global_namespace) = 1;
3124 begin_scope (sk_namespace, global_namespace);
3126 current_lang_name = NULL_TREE;
3128 /* Adjust various flags based on command-line settings. */
3129 if (!flag_permissive)
3130 flag_pedantic_errors = 1;
3131 if (!flag_no_inline)
3133 flag_inline_trees = 1;
3136 if (flag_inline_functions)
3137 flag_inline_trees = 2;
3139 /* Force minimum function alignment if using the least significant
3140 bit of function pointers to store the virtual bit. */
3141 if (TARGET_PTRMEMFUNC_VBIT_LOCATION == ptrmemfunc_vbit_in_pfn
3142 && force_align_functions_log < 1)
3143 force_align_functions_log = 1;
3146 current_lang_name = lang_name_c;
3148 /* Create the `std' namespace. */
3149 push_namespace (std_identifier);
3150 std_node = current_namespace;
3153 c_common_nodes_and_builtins ();
3155 java_byte_type_node = record_builtin_java_type ("__java_byte", 8);
3156 java_short_type_node = record_builtin_java_type ("__java_short", 16);
3157 java_int_type_node = record_builtin_java_type ("__java_int", 32);
3158 java_long_type_node = record_builtin_java_type ("__java_long", 64);
3159 java_float_type_node = record_builtin_java_type ("__java_float", -32);
3160 java_double_type_node = record_builtin_java_type ("__java_double", -64);
3161 java_char_type_node = record_builtin_java_type ("__java_char", -16);
3162 java_boolean_type_node = record_builtin_java_type ("__java_boolean", -1);
3164 integer_two_node = build_int_cst (NULL_TREE, 2);
3165 integer_three_node = build_int_cst (NULL_TREE, 3);
3167 record_builtin_type (RID_BOOL, "bool", boolean_type_node);
3168 truthvalue_type_node = boolean_type_node;
3169 truthvalue_false_node = boolean_false_node;
3170 truthvalue_true_node = boolean_true_node;
3172 empty_except_spec = build_tree_list (NULL_TREE, NULL_TREE);
3175 record_builtin_type (RID_MAX, NULL, string_type_node);
3178 delta_type_node = ptrdiff_type_node;
3179 vtable_index_type = ptrdiff_type_node;
3181 vtt_parm_type = build_pointer_type (const_ptr_type_node);
3182 void_ftype = build_function_type (void_type_node, void_list_node);
3183 void_ftype_ptr = build_function_type (void_type_node,
3184 tree_cons (NULL_TREE,
3188 = build_exception_variant (void_ftype_ptr, empty_except_spec);
3190 /* C++ extensions */
3192 unknown_type_node = make_node (UNKNOWN_TYPE);
3193 record_unknown_type (unknown_type_node, "unknown type");
3195 /* Indirecting an UNKNOWN_TYPE node yields an UNKNOWN_TYPE node. */
3196 TREE_TYPE (unknown_type_node) = unknown_type_node;
3198 /* Looking up TYPE_POINTER_TO and TYPE_REFERENCE_TO yield the same
3200 TYPE_POINTER_TO (unknown_type_node) = unknown_type_node;
3201 TYPE_REFERENCE_TO (unknown_type_node) = unknown_type_node;
3204 /* Make sure we get a unique function type, so we can give
3205 its pointer type a name. (This wins for gdb.) */
3206 tree vfunc_type = make_node (FUNCTION_TYPE);
3207 TREE_TYPE (vfunc_type) = integer_type_node;
3208 TYPE_ARG_TYPES (vfunc_type) = NULL_TREE;
3209 layout_type (vfunc_type);
3211 vtable_entry_type = build_pointer_type (vfunc_type);
3213 record_builtin_type (RID_MAX, VTBL_PTR_TYPE, vtable_entry_type);
3216 = build_cplus_array_type (vtable_entry_type, NULL_TREE);
3217 layout_type (vtbl_type_node);
3218 vtbl_type_node = build_qualified_type (vtbl_type_node, TYPE_QUAL_CONST);
3219 record_builtin_type (RID_MAX, NULL, vtbl_type_node);
3220 vtbl_ptr_type_node = build_pointer_type (vtable_entry_type);
3221 layout_type (vtbl_ptr_type_node);
3222 record_builtin_type (RID_MAX, NULL, vtbl_ptr_type_node);
3224 push_namespace (get_identifier ("__cxxabiv1"));
3225 abi_node = current_namespace;
3228 global_type_node = make_node (LANG_TYPE);
3229 record_unknown_type (global_type_node, "global type");
3232 current_lang_name = lang_name_cplusplus;
3236 tree bad_alloc_type_node;
3237 tree bad_alloc_decl;
3238 tree newtype, deltype;
3239 tree ptr_ftype_sizetype;
3241 push_namespace (std_identifier);
3242 bad_alloc_id = get_identifier ("bad_alloc");
3243 bad_alloc_type_node = make_aggr_type (RECORD_TYPE);
3244 TYPE_CONTEXT (bad_alloc_type_node) = current_namespace;
3246 = create_implicit_typedef (bad_alloc_id, bad_alloc_type_node);
3247 DECL_CONTEXT (bad_alloc_decl) = current_namespace;
3248 TYPE_STUB_DECL (bad_alloc_type_node) = bad_alloc_decl;
3252 = build_function_type (ptr_type_node,
3253 tree_cons (NULL_TREE,
3256 newtype = build_exception_variant
3257 (ptr_ftype_sizetype, add_exception_specifier
3258 (NULL_TREE, bad_alloc_type_node, -1));
3259 deltype = build_exception_variant (void_ftype_ptr, empty_except_spec);
3260 push_cp_library_fn (NEW_EXPR, newtype);
3261 push_cp_library_fn (VEC_NEW_EXPR, newtype);
3262 global_delete_fndecl = push_cp_library_fn (DELETE_EXPR, deltype);
3263 push_cp_library_fn (VEC_DELETE_EXPR, deltype);
3267 = build_library_fn_ptr ("__cxa_pure_virtual", void_ftype);
3269 /* Perform other language dependent initializations. */
3270 init_class_processing ();
3271 init_rtti_processing ();
3273 if (flag_exceptions)
3274 init_exception_processing ();
3276 if (! supports_one_only ())
3279 make_fname_decl = cp_make_fname_decl;
3280 start_fname_decls ();
3282 /* Show we use EH for cleanups. */
3283 if (flag_exceptions)
3284 using_eh_for_cleanups ();
3287 /* Generate an initializer for a function naming variable from
3288 NAME. NAME may be NULL, to indicate a dependent name. TYPE_P is
3289 filled in with the type of the init. */
3292 cp_fname_init (const char* name, tree *type_p)
3294 tree domain = NULL_TREE;
3296 tree init = NULL_TREE;
3301 length = strlen (name);
3302 domain = build_index_type (size_int (length));
3303 init = build_string (length + 1, name);
3306 type = build_qualified_type (char_type_node, TYPE_QUAL_CONST);
3307 type = build_cplus_array_type (type, domain);
3312 TREE_TYPE (init) = type;
3314 init = error_mark_node;
3319 /* Create the VAR_DECL for __FUNCTION__ etc. ID is the name to give the
3320 decl, NAME is the initialization string and TYPE_DEP indicates whether
3321 NAME depended on the type of the function. We make use of that to detect
3322 __PRETTY_FUNCTION__ inside a template fn. This is being done
3323 lazily at the point of first use, so we mustn't push the decl now. */
3326 cp_make_fname_decl (tree id, int type_dep)
3328 const char *const name = (type_dep && processing_template_decl
3329 ? NULL : fname_as_string (type_dep));
3331 tree init = cp_fname_init (name, &type);
3332 tree decl = build_decl (VAR_DECL, id, type);
3335 free ((char *) name);
3337 /* As we're using pushdecl_with_scope, we must set the context. */
3338 DECL_CONTEXT (decl) = current_function_decl;
3339 DECL_PRETTY_FUNCTION_P (decl) = type_dep;
3341 TREE_STATIC (decl) = 1;
3342 TREE_READONLY (decl) = 1;
3343 DECL_ARTIFICIAL (decl) = 1;
3345 TREE_USED (decl) = 1;
3347 if (current_function_decl)
3349 struct cp_binding_level *b = current_binding_level;
3350 while (b->level_chain->kind != sk_function_parms)
3352 pushdecl_with_scope (decl, b, /*is_friend=*/false);
3353 cp_finish_decl (decl, init, /*init_const_expr_p=*/false, NULL_TREE,
3354 LOOKUP_ONLYCONVERTING);
3357 pushdecl_top_level_and_finish (decl, init);
3362 /* Make a definition for a builtin function named NAME in the current
3363 namespace, whose data type is TYPE and whose context is CONTEXT.
3364 TYPE should be a function type with argument types.
3366 CLASS and CODE tell later passes how to compile calls to this function.
3367 See tree.h for possible values.
3369 If LIBNAME is nonzero, use that for DECL_ASSEMBLER_NAME,
3370 the name to be called if we can't opencode the function.
3371 If ATTRS is nonzero, use that for the function's attribute
3375 builtin_function_1 (const char* name,
3378 enum built_in_function code,
3379 enum built_in_class class,
3380 const char* libname,
3383 tree decl = build_library_fn_1 (get_identifier (name), ERROR_MARK, type);
3384 DECL_BUILT_IN_CLASS (decl) = class;
3385 DECL_FUNCTION_CODE (decl) = code;
3386 DECL_CONTEXT (decl) = context;
3390 /* Since `pushdecl' relies on DECL_ASSEMBLER_NAME instead of DECL_NAME,
3391 we cannot change DECL_ASSEMBLER_NAME until we have installed this
3392 function in the namespace. */
3394 SET_DECL_ASSEMBLER_NAME (decl, get_identifier (libname));
3396 /* A function in the user's namespace should have an explicit
3397 declaration before it is used. Mark the built-in function as
3398 anticipated but not actually declared. */
3399 if (name[0] != '_' || name[1] != '_')
3400 DECL_ANTICIPATED (decl) = 1;
3402 /* Possibly apply some default attributes to this built-in function. */
3404 decl_attributes (&decl, attrs, ATTR_FLAG_BUILT_IN);
3406 decl_attributes (&decl, NULL_TREE, 0);
3411 /* Entry point for the benefit of c_common_nodes_and_builtins.
3413 Make a definition for a builtin function named NAME and whose data type
3414 is TYPE. TYPE should be a function type with argument types. This
3415 function places the anticipated declaration in the global namespace
3416 and additionally in the std namespace if appropriate.
3418 CLASS and CODE tell later passes how to compile calls to this function.
3419 See tree.h for possible values.
3421 If LIBNAME is nonzero, use that for DECL_ASSEMBLER_NAME,
3422 the name to be called if we can't opencode the function.
3424 If ATTRS is nonzero, use that for the function's attribute
3428 builtin_function (const char* name,
3431 enum built_in_class cl,
3432 const char* libname,
3435 /* All builtins that don't begin with an '_' should additionally
3436 go in the 'std' namespace. */
3439 push_namespace (std_identifier);
3440 builtin_function_1 (name, type, std_node, code, cl, libname, attrs);
3444 return builtin_function_1 (name, type, NULL_TREE, code,
3445 cl, libname, attrs);
3448 /* Generate a FUNCTION_DECL with the typical flags for a runtime library
3449 function. Not called directly. */
3452 build_library_fn_1 (tree name, enum tree_code operator_code, tree type)
3454 tree fn = build_lang_decl (FUNCTION_DECL, name, type);
3455 DECL_EXTERNAL (fn) = 1;
3456 TREE_PUBLIC (fn) = 1;
3457 DECL_ARTIFICIAL (fn) = 1;
3458 SET_OVERLOADED_OPERATOR_CODE (fn, operator_code);
3459 SET_DECL_LANGUAGE (fn, lang_c);
3460 /* Runtime library routines are, by definition, available in an
3461 external shared object. */
3462 DECL_VISIBILITY (fn) = VISIBILITY_DEFAULT;
3463 DECL_VISIBILITY_SPECIFIED (fn) = 1;
3467 /* Returns the _DECL for a library function with C linkage.
3468 We assume that such functions never throw; if this is incorrect,
3469 callers should unset TREE_NOTHROW. */
3472 build_library_fn (tree name, tree type)
3474 tree fn = build_library_fn_1 (name, ERROR_MARK, type);
3475 TREE_NOTHROW (fn) = 1;
3479 /* Returns the _DECL for a library function with C++ linkage. */
3482 build_cp_library_fn (tree name, enum tree_code operator_code, tree type)
3484 tree fn = build_library_fn_1 (name, operator_code, type);
3485 TREE_NOTHROW (fn) = TYPE_NOTHROW_P (type);
3486 DECL_CONTEXT (fn) = FROB_CONTEXT (current_namespace);
3487 SET_DECL_LANGUAGE (fn, lang_cplusplus);
3491 /* Like build_library_fn, but takes a C string instead of an
3495 build_library_fn_ptr (const char* name, tree type)
3497 return build_library_fn (get_identifier (name), type);
3500 /* Like build_cp_library_fn, but takes a C string instead of an
3504 build_cp_library_fn_ptr (const char* name, tree type)
3506 return build_cp_library_fn (get_identifier (name), ERROR_MARK, type);
3509 /* Like build_library_fn, but also pushes the function so that we will
3510 be able to find it via IDENTIFIER_GLOBAL_VALUE. */
3513 push_library_fn (tree name, tree type)
3515 tree fn = build_library_fn (name, type);
3516 pushdecl_top_level (fn);
3520 /* Like build_cp_library_fn, but also pushes the function so that it
3521 will be found by normal lookup. */
3524 push_cp_library_fn (enum tree_code operator_code, tree type)
3526 tree fn = build_cp_library_fn (ansi_opname (operator_code),
3533 /* Like push_library_fn, but takes a TREE_LIST of parm types rather than
3537 push_void_library_fn (tree name, tree parmtypes)
3539 tree type = build_function_type (void_type_node, parmtypes);
3540 return push_library_fn (name, type);
3543 /* Like push_library_fn, but also note that this function throws
3544 and does not return. Used for __throw_foo and the like. */
3547 push_throw_library_fn (tree name, tree type)
3549 tree fn = push_library_fn (name, type);
3550 TREE_THIS_VOLATILE (fn) = 1;
3551 TREE_NOTHROW (fn) = 0;
3555 /* When we call finish_struct for an anonymous union, we create
3556 default copy constructors and such. But, an anonymous union
3557 shouldn't have such things; this function undoes the damage to the
3558 anonymous union type T.
3560 (The reason that we create the synthesized methods is that we don't
3561 distinguish `union { int i; }' from `typedef union { int i; } U'.
3562 The first is an anonymous union; the second is just an ordinary
3566 fixup_anonymous_aggr (tree t)
3570 /* Wipe out memory of synthesized methods. */
3571 TYPE_HAS_CONSTRUCTOR (t) = 0;
3572 TYPE_HAS_DEFAULT_CONSTRUCTOR (t) = 0;
3573 TYPE_HAS_INIT_REF (t) = 0;
3574 TYPE_HAS_CONST_INIT_REF (t) = 0;
3575 TYPE_HAS_ASSIGN_REF (t) = 0;
3576 TYPE_HAS_CONST_ASSIGN_REF (t) = 0;
3578 /* Splice the implicitly generated functions out of the TYPE_METHODS
3580 q = &TYPE_METHODS (t);
3583 if (DECL_ARTIFICIAL (*q))
3584 *q = TREE_CHAIN (*q);
3586 q = &TREE_CHAIN (*q);
3589 /* ISO C++ 9.5.3. Anonymous unions may not have function members. */
3590 if (TYPE_METHODS (t))
3591 error ("%Jan anonymous union cannot have function members",
3592 TYPE_MAIN_DECL (t));
3594 /* Anonymous aggregates cannot have fields with ctors, dtors or complex
3595 assignment operators (because they cannot have these methods themselves).
3596 For anonymous unions this is already checked because they are not allowed
3597 in any union, otherwise we have to check it. */
3598 if (TREE_CODE (t) != UNION_TYPE)
3602 for (field = TYPE_FIELDS (t); field; field = TREE_CHAIN (field))
3603 if (TREE_CODE (field) == FIELD_DECL)
3605 type = TREE_TYPE (field);
3606 if (CLASS_TYPE_P (type))
3608 if (TYPE_NEEDS_CONSTRUCTING (type))
3609 error ("member %q+#D with constructor not allowed "
3610 "in anonymous aggregate", field);
3611 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type))
3612 error ("member %q+#D with destructor not allowed "
3613 "in anonymous aggregate", field);
3614 if (TYPE_HAS_COMPLEX_ASSIGN_REF (type))
3615 error ("member %q+#D with copy assignment operator "
3616 "not allowed in anonymous aggregate", field);
3622 /* Make sure that a declaration with no declarator is well-formed, i.e.
3623 just declares a tagged type or anonymous union.
3625 Returns the type declared; or NULL_TREE if none. */
3628 check_tag_decl (cp_decl_specifier_seq *declspecs)
3630 int saw_friend = declspecs->specs[(int)ds_friend] != 0;
3631 int saw_typedef = declspecs->specs[(int)ds_typedef] != 0;
3632 /* If a class, struct, or enum type is declared by the DECLSPECS
3633 (i.e, if a class-specifier, enum-specifier, or non-typename
3634 elaborated-type-specifier appears in the DECLSPECS),
3635 DECLARED_TYPE is set to the corresponding type. */
3636 tree declared_type = NULL_TREE;
3637 bool error_p = false;
3639 if (declspecs->multiple_types_p)
3640 error ("multiple types in one declaration");
3641 else if (declspecs->redefined_builtin_type)
3643 if (!in_system_header)
3644 pedwarn ("redeclaration of C++ built-in type %qT",
3645 declspecs->redefined_builtin_type);
3650 && TYPE_P (declspecs->type)
3651 && ((TREE_CODE (declspecs->type) != TYPENAME_TYPE
3652 && IS_AGGR_TYPE (declspecs->type))
3653 || TREE_CODE (declspecs->type) == ENUMERAL_TYPE))
3654 declared_type = declspecs->type;
3655 else if (declspecs->type == error_mark_node)
3657 if (declared_type == NULL_TREE && ! saw_friend && !error_p)
3658 pedwarn ("declaration does not declare anything");
3659 /* Check for an anonymous union. */
3660 else if (declared_type && IS_AGGR_TYPE_CODE (TREE_CODE (declared_type))
3661 && TYPE_ANONYMOUS_P (declared_type))
3663 /* 7/3 In a simple-declaration, the optional init-declarator-list
3664 can be omitted only when declaring a class (clause 9) or
3665 enumeration (7.2), that is, when the decl-specifier-seq contains
3666 either a class-specifier, an elaborated-type-specifier with
3667 a class-key (9.1), or an enum-specifier. In these cases and
3668 whenever a class-specifier or enum-specifier is present in the
3669 decl-specifier-seq, the identifiers in these specifiers are among
3670 the names being declared by the declaration (as class-name,
3671 enum-names, or enumerators, depending on the syntax). In such
3672 cases, and except for the declaration of an unnamed bit-field (9.6),
3673 the decl-specifier-seq shall introduce one or more names into the
3674 program, or shall redeclare a name introduced by a previous
3675 declaration. [Example:
3676 enum { }; // ill-formed
3677 typedef class { }; // ill-formed
3681 error ("missing type-name in typedef-declaration");
3684 /* Anonymous unions are objects, so they can have specifiers. */;
3685 SET_ANON_AGGR_TYPE_P (declared_type);
3687 if (TREE_CODE (declared_type) != UNION_TYPE && pedantic
3688 && !in_system_header)
3689 pedwarn ("ISO C++ prohibits anonymous structs");
3694 if (declspecs->specs[(int)ds_inline]
3695 || declspecs->specs[(int)ds_virtual])
3696 error ("%qs can only be specified for functions",
3697 declspecs->specs[(int)ds_inline]
3698 ? "inline" : "virtual");
3700 && (!current_class_type
3701 || current_scope () != current_class_type))
3702 error ("%<friend%> can only be specified inside a class");
3703 else if (declspecs->specs[(int)ds_explicit])
3704 error ("%<explicit%> can only be specified for constructors");
3705 else if (declspecs->storage_class)
3706 error ("a storage class can only be specified for objects "
3708 else if (declspecs->specs[(int)ds_const]
3709 || declspecs->specs[(int)ds_volatile]
3710 || declspecs->specs[(int)ds_restrict]
3711 || declspecs->specs[(int)ds_thread])
3712 error ("qualifiers can only be specified for objects "
3716 return declared_type;
3719 /* Called when a declaration is seen that contains no names to declare.
3720 If its type is a reference to a structure, union or enum inherited
3721 from a containing scope, shadow that tag name for the current scope
3722 with a forward reference.
3723 If its type defines a new named structure or union
3724 or defines an enum, it is valid but we need not do anything here.
3725 Otherwise, it is an error.
3727 C++: may have to grok the declspecs to learn about static,
3728 complain for anonymous unions.
3730 Returns the TYPE declared -- or NULL_TREE if none. */
3733 shadow_tag (cp_decl_specifier_seq *declspecs)
3735 tree t = check_tag_decl (declspecs);
3740 if (declspecs->attributes)
3742 warning (0, "attribute ignored in declaration of %q+#T", t);
3743 warning (0, "attribute for %q+#T must follow the %qs keyword",
3744 t, class_key_or_enum_as_string (t));
3748 if (maybe_process_partial_specialization (t) == error_mark_node)
3751 /* This is where the variables in an anonymous union are
3752 declared. An anonymous union declaration looks like:
3754 because there is no declarator after the union, the parser
3755 sends that declaration here. */
3756 if (ANON_AGGR_TYPE_P (t))
3758 fixup_anonymous_aggr (t);
3760 if (TYPE_FIELDS (t))
3762 tree decl = grokdeclarator (/*declarator=*/NULL,
3763 declspecs, NORMAL, 0, NULL);
3764 finish_anon_union (decl);
3771 /* Decode a "typename", such as "int **", returning a ..._TYPE node. */
3774 groktypename (cp_decl_specifier_seq *type_specifiers,
3775 const cp_declarator *declarator)
3779 attrs = type_specifiers->attributes;
3780 type_specifiers->attributes = NULL_TREE;
3781 type = grokdeclarator (declarator, type_specifiers, TYPENAME, 0, &attrs);
3783 cplus_decl_attributes (&type, attrs, 0);
3787 /* Decode a declarator in an ordinary declaration or data definition.
3788 This is called as soon as the type information and variable name
3789 have been parsed, before parsing the initializer if any.
3790 Here we create the ..._DECL node, fill in its type,
3791 and put it on the list of decls for the current context.
3792 The ..._DECL node is returned as the value.
3794 Exception: for arrays where the length is not specified,
3795 the type is left null, to be filled in by `cp_finish_decl'.
3797 Function definitions do not come here; they go to start_function
3798 instead. However, external and forward declarations of functions
3799 do go through here. Structure field declarations are done by
3800 grokfield and not through here. */
3803 start_decl (const cp_declarator *declarator,
3804 cp_decl_specifier_seq *declspecs,
3807 tree prefix_attributes,
3808 tree *pushed_scope_p)
3814 *pushed_scope_p = NULL_TREE;
3816 /* An object declared as __attribute__((deprecated)) suppresses
3817 warnings of uses of other deprecated items. */
3818 if (lookup_attribute ("deprecated", attributes))
3819 deprecated_state = DEPRECATED_SUPPRESS;
3821 attributes = chainon (attributes, prefix_attributes);
3823 decl = grokdeclarator (declarator, declspecs, NORMAL, initialized,
3826 deprecated_state = DEPRECATED_NORMAL;
3828 if (decl == NULL_TREE || TREE_CODE (decl) == VOID_TYPE
3829 || decl == error_mark_node)
3830 return error_mark_node;
3832 type = TREE_TYPE (decl);
3834 context = DECL_CONTEXT (decl);
3838 *pushed_scope_p = push_scope (context);
3840 /* We are only interested in class contexts, later. */
3841 if (TREE_CODE (context) == NAMESPACE_DECL)
3842 context = NULL_TREE;
3846 /* Is it valid for this decl to have an initializer at all?
3847 If not, set INITIALIZED to zero, which will indirectly
3848 tell `cp_finish_decl' to ignore the initializer once it is parsed. */
3849 switch (TREE_CODE (decl))
3852 error ("typedef %qD is initialized (use __typeof__ instead)", decl);
3853 return error_mark_node;
3856 error ("function %q#D is initialized like a variable", decl);
3866 if (! toplevel_bindings_p ()
3867 && DECL_EXTERNAL (decl))
3868 warning (0, "declaration of %q#D has %<extern%> and is initialized",
3870 DECL_EXTERNAL (decl) = 0;
3871 if (toplevel_bindings_p ())
3872 TREE_STATIC (decl) = 1;
3875 /* Set attributes here so if duplicate decl, will have proper attributes. */
3876 cplus_decl_attributes (&decl, attributes, 0);
3878 /* Dllimported symbols cannot be defined. Static data members (which
3879 can be initialized in-class and dllimported) go through grokfield,
3880 not here, so we don't need to exclude those decls when checking for
3882 if (initialized && DECL_DLLIMPORT_P (decl))
3884 error ("definition of %q#D is marked %<dllimport%>", decl);
3885 DECL_DLLIMPORT_P (decl) = 0;
3888 /* If #pragma weak was used, mark the decl weak now. */
3889 maybe_apply_pragma_weak (decl);
3891 if (TREE_CODE (decl) == FUNCTION_DECL
3892 && DECL_DECLARED_INLINE_P (decl)
3893 && DECL_UNINLINABLE (decl)
3894 && lookup_attribute ("noinline", DECL_ATTRIBUTES (decl)))
3895 warning (0, "inline function %q+D given attribute noinline", decl);
3897 if (context && COMPLETE_TYPE_P (complete_type (context)))
3899 if (TREE_CODE (decl) == VAR_DECL)
3901 tree field = lookup_field (context, DECL_NAME (decl), 0, false);
3902 if (field == NULL_TREE || TREE_CODE (field) != VAR_DECL)
3903 error ("%q#D is not a static member of %q#T", decl, context);
3906 if (DECL_CONTEXT (field) != context)
3908 if (!same_type_p (DECL_CONTEXT (field), context))
3909 pedwarn ("ISO C++ does not permit %<%T::%D%> "
3910 "to be defined as %<%T::%D%>",
3911 DECL_CONTEXT (field), DECL_NAME (decl),
3912 context, DECL_NAME (decl));
3913 DECL_CONTEXT (decl) = DECL_CONTEXT (field);
3915 if (processing_specialization
3916 && template_class_depth (context) == 0
3917 && CLASSTYPE_TEMPLATE_SPECIALIZATION (context))
3918 error ("template header not allowed in member definition "
3919 "of explicitly specialized class");
3920 /* Static data member are tricky; an in-class initialization
3921 still doesn't provide a definition, so the in-class
3922 declaration will have DECL_EXTERNAL set, but will have an
3923 initialization. Thus, duplicate_decls won't warn
3924 about this situation, and so we check here. */
3925 if (initialized && DECL_INITIALIZED_IN_CLASS_P (field))
3926 error ("duplicate initialization of %qD", decl);
3927 if (duplicate_decls (decl, field, /*newdecl_is_friend=*/false))
3933 tree field = check_classfn (context, decl,
3934 (processing_template_decl
3935 > template_class_depth (context))
3936 ? current_template_parms
3938 if (field && duplicate_decls (decl, field,
3939 /*newdecl_is_friend=*/false))
3943 /* cp_finish_decl sets DECL_EXTERNAL if DECL_IN_AGGR_P is set. */
3944 DECL_IN_AGGR_P (decl) = 0;
3945 /* Do not mark DECL as an explicit specialization if it was not
3946 already marked as an instantiation; a declaration should
3947 never be marked as a specialization unless we know what
3948 template is being specialized. */
3949 if (DECL_LANG_SPECIFIC (decl) && DECL_USE_TEMPLATE (decl))
3951 SET_DECL_TEMPLATE_SPECIALIZATION (decl);
3953 /* [temp.expl.spec] An explicit specialization of a static data
3954 member of a template is a definition if the declaration
3955 includes an initializer; otherwise, it is a declaration.
3957 We check for processing_specialization so this only applies
3958 to the new specialization syntax. */
3959 if (!initialized && processing_specialization)
3960 DECL_EXTERNAL (decl) = 1;
3963 if (DECL_EXTERNAL (decl) && ! DECL_TEMPLATE_SPECIALIZATION (decl))
3964 pedwarn ("declaration of %q#D outside of class is not definition",
3968 /* Enter this declaration into the symbol table. */
3969 tem = maybe_push_decl (decl);
3971 if (processing_template_decl)
3972 tem = push_template_decl (tem);
3973 if (tem == error_mark_node)
3974 return error_mark_node;
3976 /* Tell the back-end to use or not use .common as appropriate. If we say
3977 -fconserve-space, we want this to save .data space, at the expense of
3978 wrong semantics. If we say -fno-conserve-space, we want this to
3979 produce errors about redefs; to do this we force variables into the
3981 if (flag_conserve_space
3982 && TREE_CODE (tem) == VAR_DECL
3983 && TREE_PUBLIC (tem)
3984 && !DECL_THREAD_LOCAL_P (tem)
3985 && !have_global_bss_p ())
3986 DECL_COMMON (tem) = 1;
3988 if (!processing_template_decl && TREE_CODE (tem) == VAR_DECL)
3989 start_decl_1 (tem, initialized);
3995 start_decl_1 (tree decl, bool initialized)
3999 gcc_assert (!processing_template_decl);
4001 if (error_operand_p (decl))
4004 gcc_assert (TREE_CODE (decl) == VAR_DECL);
4005 type = TREE_TYPE (decl);
4008 /* Is it valid for this decl to have an initializer at all?
4009 If not, set INITIALIZED to zero, which will indirectly
4010 tell `cp_finish_decl' to ignore the initializer once it is parsed. */
4012 /* Don't allow initializations for incomplete types except for
4013 arrays which might be completed by the initialization. */
4014 if (COMPLETE_TYPE_P (complete_type (type)))
4015 ; /* A complete type is ok. */
4016 else if (TREE_CODE (type) != ARRAY_TYPE)
4018 error ("variable %q#D has initializer but incomplete type", decl);
4020 type = TREE_TYPE (decl) = error_mark_node;
4022 else if (!COMPLETE_TYPE_P (complete_type (TREE_TYPE (type))))
4024 if (DECL_LANG_SPECIFIC (decl) && DECL_TEMPLATE_INFO (decl))
4025 error ("elements of array %q#D have incomplete type", decl);
4026 /* else we already gave an error in start_decl. */
4030 else if (IS_AGGR_TYPE (type)
4031 && ! DECL_EXTERNAL (decl))
4033 if (!COMPLETE_TYPE_P (complete_type (type)))
4035 error ("aggregate %q#D has incomplete type and cannot be defined",
4037 /* Change the type so that assemble_variable will give
4038 DECL an rtl we can live with: (mem (const_int 0)). */
4039 type = TREE_TYPE (decl) = error_mark_node;
4043 /* If any base type in the hierarchy of TYPE needs a constructor,
4044 then we set initialized to 1. This way any nodes which are
4045 created for the purposes of initializing this aggregate
4046 will live as long as it does. This is necessary for global
4047 aggregates which do not have their initializers processed until
4048 the end of the file. */
4049 initialized = TYPE_NEEDS_CONSTRUCTING (type);
4053 /* Create a new scope to hold this declaration if necessary.
4054 Whether or not a new scope is necessary cannot be determined
4055 until after the type has been completed; if the type is a
4056 specialization of a class template it is not until after
4057 instantiation has occurred that TYPE_HAS_NONTRIVIAL_DESTRUCTOR
4058 will be set correctly. */
4059 maybe_push_cleanup_level (type);
4062 /* Handle initialization of references. DECL, TYPE, and INIT have the
4063 same meaning as in cp_finish_decl. *CLEANUP must be NULL on entry,
4064 but will be set to a new CLEANUP_STMT if a temporary is created
4065 that must be destroyed subsequently.
4067 Returns an initializer expression to use to initialize DECL, or
4068 NULL if the initialization can be performed statically.
4070 Quotes on semantics can be found in ARM 8.4.3. */
4073 grok_reference_init (tree decl, tree type, tree init, tree *cleanup)
4077 if (init == NULL_TREE)
4079 if ((DECL_LANG_SPECIFIC (decl) == 0
4080 || DECL_IN_AGGR_P (decl) == 0)
4081 && ! DECL_THIS_EXTERN (decl))
4082 error ("%qD declared as reference but not initialized", decl);
4086 if (TREE_CODE (init) == CONSTRUCTOR)
4088 error ("ISO C++ forbids use of initializer list to "
4089 "initialize reference %qD", decl);
4093 if (TREE_CODE (init) == TREE_LIST)
4094 init = build_x_compound_expr_from_list (init, "initializer");
4096 if (TREE_CODE (TREE_TYPE (type)) != ARRAY_TYPE
4097 && TREE_CODE (TREE_TYPE (init)) == ARRAY_TYPE)
4098 /* Note: default conversion is only called in very special cases. */
4099 init = decay_conversion (init);
4101 /* Convert INIT to the reference type TYPE. This may involve the
4102 creation of a temporary, whose lifetime must be the same as that
4103 of the reference. If so, a DECL_EXPR for the temporary will be
4104 added just after the DECL_EXPR for DECL. That's why we don't set
4105 DECL_INITIAL for local references (instead assigning to them
4106 explicitly); we need to allow the temporary to be initialized
4108 tmp = initialize_reference (type, init, decl, cleanup);
4110 if (tmp == error_mark_node)
4112 else if (tmp == NULL_TREE)
4114 error ("cannot initialize %qT from %qT", type, TREE_TYPE (init));
4118 if (TREE_STATIC (decl) && !TREE_CONSTANT (tmp))
4121 DECL_INITIAL (decl) = tmp;
4126 /* When parsing `int a[] = {1, 2};' we don't know the size of the
4127 array until we finish parsing the initializer. If that's the
4128 situation we're in, update DECL accordingly. */
4131 maybe_deduce_size_from_array_init (tree decl, tree init)
4133 tree type = TREE_TYPE (decl);
4135 if (TREE_CODE (type) == ARRAY_TYPE
4136 && TYPE_DOMAIN (type) == NULL_TREE
4137 && TREE_CODE (decl) != TYPE_DECL)
4139 /* do_default is really a C-ism to deal with tentative definitions.
4140 But let's leave it here to ease the eventual merge. */
4141 int do_default = !DECL_EXTERNAL (decl);
4142 tree initializer = init ? init : DECL_INITIAL (decl);
4143 int failure = cp_complete_array_type (&TREE_TYPE (decl), initializer,
4148 error ("initializer fails to determine size of %qD", decl);
4149 TREE_TYPE (decl) = error_mark_node;
4151 else if (failure == 2)
4155 error ("array size missing in %qD", decl);
4156 TREE_TYPE (decl) = error_mark_node;
4158 /* If a `static' var's size isn't known, make it extern as
4159 well as static, so it does not get allocated. If it's not
4160 `static', then don't mark it extern; finish_incomplete_decl
4161 will give it a default size and it will get allocated. */
4162 else if (!pedantic && TREE_STATIC (decl) && !TREE_PUBLIC (decl))
4163 DECL_EXTERNAL (decl) = 1;
4165 else if (failure == 3)
4167 error ("zero-size array %qD", decl);
4168 TREE_TYPE (decl) = error_mark_node;
4171 cp_apply_type_quals_to_decl (cp_type_quals (TREE_TYPE (decl)), decl);
4173 layout_decl (decl, 0);
4177 /* Set DECL_SIZE, DECL_ALIGN, etc. for DECL (a VAR_DECL), and issue
4178 any appropriate error messages regarding the layout. */
4181 layout_var_decl (tree decl)
4185 type = TREE_TYPE (decl);
4186 if (type == error_mark_node)
4189 /* If we haven't already layed out this declaration, do so now.
4190 Note that we must not call complete type for an external object
4191 because it's type might involve templates that we are not
4192 supposed to instantiate yet. (And it's perfectly valid to say
4193 `extern X x' for some incomplete type `X'.) */
4194 if (!DECL_EXTERNAL (decl))
4195 complete_type (type);
4196 if (!DECL_SIZE (decl)
4197 && TREE_TYPE (decl) != error_mark_node
4198 && (COMPLETE_TYPE_P (type)
4199 || (TREE_CODE (type) == ARRAY_TYPE
4200 && !TYPE_DOMAIN (type)
4201 && COMPLETE_TYPE_P (TREE_TYPE (type)))))
4202 layout_decl (decl, 0);
4204 if (!DECL_EXTERNAL (decl) && DECL_SIZE (decl) == NULL_TREE)
4206 /* An automatic variable with an incomplete type: that is an error.
4207 Don't talk about array types here, since we took care of that
4208 message in grokdeclarator. */
4209 error ("storage size of %qD isn't known", decl);
4210 TREE_TYPE (decl) = error_mark_node;
4213 /* Keep this code around in case we later want to control debug info
4214 based on whether a type is "used". (jason 1999-11-11) */
4216 else if (!DECL_EXTERNAL (decl) && IS_AGGR_TYPE (ttype))
4217 /* Let debugger know it should output info for this type. */
4218 note_debug_info_needed (ttype);
4220 if (TREE_STATIC (decl) && DECL_CLASS_SCOPE_P (decl))
4221 note_debug_info_needed (DECL_CONTEXT (decl));
4224 if ((DECL_EXTERNAL (decl) || TREE_STATIC (decl))
4225 && DECL_SIZE (decl) != NULL_TREE
4226 && ! TREE_CONSTANT (DECL_SIZE (decl)))
4228 if (TREE_CODE (DECL_SIZE (decl)) == INTEGER_CST)
4229 constant_expression_warning (DECL_SIZE (decl));
4231 error ("storage size of %qD isn't constant", decl);
4235 /* If a local static variable is declared in an inline function, or if
4236 we have a weak definition, we must endeavor to create only one
4237 instance of the variable at link-time. */
4240 maybe_commonize_var (tree decl)
4242 /* Static data in a function with comdat linkage also has comdat
4244 if (TREE_STATIC (decl)
4245 /* Don't mess with __FUNCTION__. */
4246 && ! DECL_ARTIFICIAL (decl)
4247 && DECL_FUNCTION_SCOPE_P (decl)
4248 /* Unfortunately, import_export_decl has not always been called
4249 before the function is processed, so we cannot simply check
4251 && (DECL_COMDAT (DECL_CONTEXT (decl))
4252 || ((DECL_DECLARED_INLINE_P (DECL_CONTEXT (decl))
4253 || DECL_TEMPLATE_INSTANTIATION (DECL_CONTEXT (decl)))
4254 && TREE_PUBLIC (DECL_CONTEXT (decl)))))
4258 /* With weak symbols, we simply make the variable COMDAT;
4259 that will cause copies in multiple translations units to
4261 comdat_linkage (decl);
4265 if (DECL_INITIAL (decl) == NULL_TREE
4266 || DECL_INITIAL (decl) == error_mark_node)
4268 /* Without weak symbols, we can use COMMON to merge
4269 uninitialized variables. */
4270 TREE_PUBLIC (decl) = 1;
4271 DECL_COMMON (decl) = 1;
4275 /* While for initialized variables, we must use internal
4276 linkage -- which means that multiple copies will not
4278 TREE_PUBLIC (decl) = 0;
4279 DECL_COMMON (decl) = 0;
4280 warning (0, "sorry: semantics of inline function static "
4281 "data %q+#D are wrong (you'll wind up "
4282 "with multiple copies)", decl);
4283 warning (0, "%J you can work around this by removing "
4289 else if (DECL_LANG_SPECIFIC (decl) && DECL_COMDAT (decl))
4290 /* Set it up again; we might have set DECL_INITIAL since the last
4292 comdat_linkage (decl);
4295 /* Issue an error message if DECL is an uninitialized const variable. */
4298 check_for_uninitialized_const_var (tree decl)
4300 tree type = TREE_TYPE (decl);
4302 /* ``Unless explicitly declared extern, a const object does not have
4303 external linkage and must be initialized. ($8.4; $12.1)'' ARM
4305 if (TREE_CODE (decl) == VAR_DECL
4306 && TREE_CODE (type) != REFERENCE_TYPE
4307 && CP_TYPE_CONST_P (type)
4308 && !TYPE_NEEDS_CONSTRUCTING (type)
4309 && !DECL_INITIAL (decl))
4310 error ("uninitialized const %qD", decl);
4314 /* Structure holding the current initializer being processed by reshape_init.
4315 CUR is a pointer to the current element being processed, END is a pointer
4316 after the last element present in the initializer. */
4317 typedef struct reshape_iterator_t
4319 constructor_elt *cur;
4320 constructor_elt *end;
4323 static tree reshape_init_r (tree, reshape_iter *, bool);
4325 /* FIELD is a FIELD_DECL or NULL. In the former case, the value
4326 returned is the next FIELD_DECL (possibly FIELD itself) that can be
4327 initialized. If there are no more such fields, the return value
4331 next_initializable_field (tree field)
4334 && (TREE_CODE (field) != FIELD_DECL
4335 || (DECL_C_BIT_FIELD (field) && !DECL_NAME (field))
4336 || DECL_ARTIFICIAL (field)))
4337 field = TREE_CHAIN (field);
4342 /* Subroutine of reshape_init_array and reshape_init_vector, which does
4343 the actual work. ELT_TYPE is the element type of the array. MAX_INDEX is an
4344 INTEGER_CST representing the size of the array minus one (the maximum index),
4345 or NULL_TREE if the array was declared without specifying the size. D is
4346 the iterator within the constructor. */
4349 reshape_init_array_1 (tree elt_type, tree max_index, reshape_iter *d)
4352 bool sized_array_p = (max_index != NULL_TREE);
4353 unsigned HOST_WIDE_INT max_index_cst = 0;
4354 unsigned HOST_WIDE_INT index;
4356 /* The initializer for an array is always a CONSTRUCTOR. */
4357 new_init = build_constructor (NULL_TREE, NULL);
4361 /* Minus 1 is used for zero sized arrays. */
4362 if (integer_all_onesp (max_index))
4365 if (host_integerp (max_index, 1))
4366 max_index_cst = tree_low_cst (max_index, 1);
4367 /* sizetype is sign extended, not zero extended. */
4369 max_index_cst = tree_low_cst (fold_convert (size_type_node, max_index),
4373 /* Loop until there are no more initializers. */
4375 d->cur != d->end && (!sized_array_p || index <= max_index_cst);
4382 /* Handle array designated initializers (GNU extension). */
4383 if (TREE_CODE (d->cur->index) == IDENTIFIER_NODE)
4385 error ("name %qD used in a GNU-style designated "
4386 "initializer for an array", d->cur->index);
4392 elt_init = reshape_init_r (elt_type, d, /*first_initializer_p=*/false);
4393 if (elt_init == error_mark_node)
4394 return error_mark_node;
4395 CONSTRUCTOR_APPEND_ELT (CONSTRUCTOR_ELTS (new_init), NULL_TREE, elt_init);
4401 /* Subroutine of reshape_init_r, processes the initializers for arrays.
4402 Parameters are the same of reshape_init_r. */
4405 reshape_init_array (tree type, reshape_iter *d)
4407 tree max_index = NULL_TREE;
4409 gcc_assert (TREE_CODE (type) == ARRAY_TYPE);
4411 if (TYPE_DOMAIN (type))
4412 max_index = array_type_nelts (type);
4414 return reshape_init_array_1 (TREE_TYPE (type), max_index, d);
4417 /* Subroutine of reshape_init_r, processes the initializers for vectors.
4418 Parameters are the same of reshape_init_r. */
4421 reshape_init_vector (tree type, reshape_iter *d)
4423 tree max_index = NULL_TREE;
4426 gcc_assert (TREE_CODE (type) == VECTOR_TYPE);
4428 if (COMPOUND_LITERAL_P (d->cur->value))
4430 tree value = d->cur->value;
4431 if (!same_type_p (TREE_TYPE (value), type))
4433 error ("invalid type %qT as initializer for a vector of type %qT",
4434 TREE_TYPE (d->cur->value), type);
4435 value = error_mark_node;
4441 /* For a vector, the representation type is a struct
4442 containing a single member which is an array of the
4443 appropriate size. */
4444 rtype = TYPE_DEBUG_REPRESENTATION_TYPE (type);
4445 if (rtype && TYPE_DOMAIN (TREE_TYPE (TYPE_FIELDS (rtype))))
4446 max_index = array_type_nelts (TREE_TYPE (TYPE_FIELDS (rtype)));
4448 return reshape_init_array_1 (TREE_TYPE (type), max_index, d);
4451 /* Subroutine of reshape_init_r, processes the initializers for classes
4452 or union. Parameters are the same of reshape_init_r. */
4455 reshape_init_class (tree type, reshape_iter *d, bool first_initializer_p)
4460 gcc_assert (CLASS_TYPE_P (type));
4462 /* The initializer for a class is always a CONSTRUCTOR. */
4463 new_init = build_constructor (NULL_TREE, NULL);
4464 field = next_initializable_field (TYPE_FIELDS (type));
4470 An initializer for an aggregate member that is an
4471 empty class shall have the form of an empty
4472 initializer-list {}. */
4473 if (!first_initializer_p)
4475 error ("initializer for %qT must be brace-enclosed", type);
4476 return error_mark_node;
4481 /* Loop through the initializable fields, gathering initializers. */
4482 while (d->cur != d->end)
4486 /* Handle designated initializers, as an extension. */
4490 pedwarn ("ISO C++ does not allow designated initializers");
4492 field = lookup_field_1 (type, d->cur->index, /*want_type=*/false);
4494 if (!field || TREE_CODE (field) != FIELD_DECL)
4496 error ("%qT has no non-static data member named %qD", type,
4498 return error_mark_node;
4502 /* If we processed all the member of the class, we are done. */
4506 field_init = reshape_init_r (TREE_TYPE (field), d,
4507 /*first_initializer_p=*/false);
4508 CONSTRUCTOR_APPEND_ELT (CONSTRUCTOR_ELTS (new_init), field, field_init);
4512 When a union is initialized with a brace-enclosed
4513 initializer, the braces shall only contain an
4514 initializer for the first member of the union. */
4515 if (TREE_CODE (type) == UNION_TYPE)
4518 field = next_initializable_field (TREE_CHAIN (field));
4524 /* Subroutine of reshape_init, which processes a single initializer (part of
4525 a CONSTRUCTOR). TYPE is the type of the variable being initialized, D is the
4526 iterator within the CONSTRUCTOR which points to the initializer to process.
4527 FIRST_INITIALIZER_P is true if this is the first initializer of the
4528 CONSTRUCTOR node. */
4531 reshape_init_r (tree type, reshape_iter *d, bool first_initializer_p)
4533 tree init = d->cur->value;
4535 /* A non-aggregate type is always initialized with a single
4537 if (!CP_AGGREGATE_TYPE_P (type))
4539 /* It is invalid to initialize a non-aggregate type with a
4540 brace-enclosed initializer.
4541 We need to check for BRACE_ENCLOSED_INITIALIZER_P here because
4542 of g++.old-deja/g++.mike/p7626.C: a pointer-to-member constant is
4543 a CONSTRUCTOR (with a record type). */
4544 if (TREE_CODE (init) == CONSTRUCTOR
4545 && BRACE_ENCLOSED_INITIALIZER_P (init)) /* p7626.C */
4547 error ("braces around scalar initializer for type %qT", type);
4548 init = error_mark_node;
4557 All implicit type conversions (clause _conv_) are considered when
4558 initializing the aggregate member with an initializer from an
4559 initializer-list. If the initializer can initialize a member,
4560 the member is initialized. Otherwise, if the member is itself a
4561 non-empty subaggregate, brace elision is assumed and the
4562 initializer is considered for the initialization of the first
4563 member of the subaggregate. */
4564 if (TREE_CODE (init) != CONSTRUCTOR
4565 && can_convert_arg (type, TREE_TYPE (init), init, LOOKUP_NORMAL))
4571 /* [dcl.init.string]
4573 A char array (whether plain char, signed char, or unsigned char)
4574 can be initialized by a string-literal (optionally enclosed in
4575 braces); a wchar_t array can be initialized by a wide
4576 string-literal (optionally enclosed in braces). */
4577 if (TREE_CODE (type) == ARRAY_TYPE
4578 && char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (type))))
4580 tree str_init = init;
4582 /* Strip one level of braces if and only if they enclose a single
4583 element (as allowed by [dcl.init.string]). */
4584 if (!first_initializer_p
4585 && TREE_CODE (str_init) == CONSTRUCTOR
4586 && VEC_length (constructor_elt, CONSTRUCTOR_ELTS (str_init)) == 1)
4588 str_init = VEC_index (constructor_elt,
4589 CONSTRUCTOR_ELTS (str_init), 0)->value;
4592 /* If it's a string literal, then it's the initializer for the array
4593 as a whole. Otherwise, continue with normal initialization for
4594 array types (one value per array element). */
4595 if (TREE_CODE (str_init) == STRING_CST)
4602 /* The following cases are about aggregates. If we are not within a full
4603 initializer already, and there is not a CONSTRUCTOR, it means that there
4604 is a missing set of braces (that is, we are processing the case for
4605 which reshape_init exists). */
4606 if (!first_initializer_p)
4608 if (TREE_CODE (init) == CONSTRUCTOR)
4610 /* For a nested compound literal, there is no need to reshape since
4611 brace elision is not allowed. Even if we decided to allow it,
4612 we should add a call to reshape_init in finish_compound_literal,
4613 before calling digest_init, so changing this code would still
4614 not be necessary. */
4615 if (!COMPOUND_LITERAL_P (init))
4618 gcc_assert (BRACE_ENCLOSED_INITIALIZER_P (init));
4619 return reshape_init (type, init);
4622 gcc_assert (!BRACE_ENCLOSED_INITIALIZER_P (init));
4625 warning (OPT_Wmissing_braces, "missing braces around initializer for %qT",
4629 /* Dispatch to specialized routines. */
4630 if (CLASS_TYPE_P (type))
4631 return reshape_init_class (type, d, first_initializer_p);
4632 else if (TREE_CODE (type) == ARRAY_TYPE)
4633 return reshape_init_array (type, d);
4634 else if (TREE_CODE (type) == VECTOR_TYPE)
4635 return reshape_init_vector (type, d);
4640 /* Undo the brace-elision allowed by [dcl.init.aggr] in a
4641 brace-enclosed aggregate initializer.
4643 INIT is the CONSTRUCTOR containing the list of initializers describing
4644 a brace-enclosed initializer for an entity of the indicated aggregate TYPE.
4645 It may not presently match the shape of the TYPE; for example:
4647 struct S { int a; int b; };
4648 struct S a[] = { 1, 2, 3, 4 };
4650 Here INIT will hold a VEC of four elements, rather than a
4651 VEC of two elements, each itself a VEC of two elements. This
4652 routine transforms INIT from the former form into the latter. The
4653 revised CONSTRUCTOR node is returned. */
4656 reshape_init (tree type, tree init)
4658 VEC(constructor_elt, gc) *v;
4662 gcc_assert (BRACE_ENCLOSED_INITIALIZER_P (init));
4664 v = CONSTRUCTOR_ELTS (init);
4666 /* An empty constructor does not need reshaping, and it is always a valid
4668 if (VEC_empty (constructor_elt, v))
4671 /* Recurse on this CONSTRUCTOR. */
4672 d.cur = VEC_index (constructor_elt, v, 0);
4673 d.end = d.cur + VEC_length (constructor_elt, v);
4675 new_init = reshape_init_r (type, &d, true);
4676 if (new_init == error_mark_node)
4677 return error_mark_node;
4679 /* Make sure all the element of the constructor were used. Otherwise,
4680 issue an error about exceeding initializers. */
4682 error ("too many initializers for %qT", type);
4687 /* Verify INIT (the initializer for DECL), and record the
4688 initialization in DECL_INITIAL, if appropriate. CLEANUP is as for
4689 grok_reference_init.
4691 If the return value is non-NULL, it is an expression that must be
4692 evaluated dynamically to initialize DECL. */
4695 check_initializer (tree decl, tree init, int flags, tree *cleanup)
4697 tree type = TREE_TYPE (decl);
4698 tree init_code = NULL;
4700 /* Things that are going to be initialized need to have complete
4702 TREE_TYPE (decl) = type = complete_type (TREE_TYPE (decl));
4704 if (type == error_mark_node)
4705 /* We will have already complained. */
4707 else if (init && COMPLETE_TYPE_P (type)
4708 && !TREE_CONSTANT (TYPE_SIZE (type)))
4710 error ("variable-sized object %qD may not be initialized", decl);
4713 else if (TREE_CODE (type) == ARRAY_TYPE
4714 && !COMPLETE_TYPE_P (complete_type (TREE_TYPE (type))))
4716 error ("elements of array %q#D have incomplete type", decl);
4719 else if (TREE_CODE (type) != ARRAY_TYPE && !COMPLETE_TYPE_P (type))
4721 error ("%qD has incomplete type", decl);
4722 TREE_TYPE (decl) = error_mark_node;
4725 else if (!CP_AGGREGATE_TYPE_P (type)
4726 && init && BRACE_ENCLOSED_INITIALIZER_P (init)
4727 && VEC_length (constructor_elt, CONSTRUCTOR_ELTS (init)) != 1)
4729 error ("scalar object %qD requires one element in initializer", decl);
4730 TREE_TYPE (decl) = error_mark_node;
4734 if (TREE_CODE (decl) == CONST_DECL)
4736 gcc_assert (TREE_CODE (type) != REFERENCE_TYPE);
4738 DECL_INITIAL (decl) = init;
4740 gcc_assert (init != NULL_TREE);
4743 else if (!DECL_EXTERNAL (decl) && TREE_CODE (type) == REFERENCE_TYPE)
4744 init = grok_reference_init (decl, type, init, cleanup);
4747 /* Do not reshape constructors of vectors (they don't need to be
4749 if (TREE_CODE (init) == CONSTRUCTOR
4750 && !COMPOUND_LITERAL_P (init)
4751 && !TREE_TYPE (init)) /* ptrmemfunc */
4753 init = reshape_init (type, init);
4755 if ((*targetm.vector_opaque_p) (type))
4757 error ("opaque vector types cannot be initialized");
4758 init = error_mark_node;
4762 /* If DECL has an array type without a specific bound, deduce the
4763 array size from the initializer. */
4764 maybe_deduce_size_from_array_init (decl, init);
4765 type = TREE_TYPE (decl);
4766 if (type == error_mark_node)
4769 if (TYPE_HAS_CONSTRUCTOR (type) || TYPE_NEEDS_CONSTRUCTING (type))
4771 if (TREE_CODE (type) == ARRAY_TYPE)
4772 goto initialize_aggr;
4773 else if (TREE_CODE (init) == CONSTRUCTOR)
4775 if (TYPE_NON_AGGREGATE_CLASS (type))
4777 error ("%qD must be initialized by constructor, "
4780 init = error_mark_node;
4783 goto dont_use_constructor;
4787 int saved_stmts_are_full_exprs_p;
4790 saved_stmts_are_full_exprs_p = 0;
4791 if (building_stmt_tree ())
4793 saved_stmts_are_full_exprs_p = stmts_are_full_exprs_p ();
4794 current_stmt_tree ()->stmts_are_full_exprs_p = 1;
4796 init = build_aggr_init (decl, init, flags);
4797 if (building_stmt_tree ())
4798 current_stmt_tree ()->stmts_are_full_exprs_p =
4799 saved_stmts_are_full_exprs_p;
4805 dont_use_constructor:
4806 if (TREE_CODE (init) != TREE_VEC)
4808 init_code = store_init_value (decl, init);
4809 if (pedantic && TREE_CODE (type) == ARRAY_TYPE
4810 && DECL_INITIAL (decl)
4811 && TREE_CODE (DECL_INITIAL (decl)) == STRING_CST
4812 && PAREN_STRING_LITERAL_P (DECL_INITIAL (decl)))
4813 warning (0, "array %qD initialized by parenthesized string literal %qE",
4814 decl, DECL_INITIAL (decl));
4819 else if (DECL_EXTERNAL (decl))
4821 else if (TYPE_P (type) && TYPE_NEEDS_CONSTRUCTING (type))
4822 goto initialize_aggr;
4823 else if (IS_AGGR_TYPE (type))
4825 tree core_type = strip_array_types (type);
4827 if (CLASSTYPE_READONLY_FIELDS_NEED_INIT (core_type))
4828 error ("structure %qD with uninitialized const members", decl);
4829 if (CLASSTYPE_REF_FIELDS_NEED_INIT (core_type))
4830 error ("structure %qD with uninitialized reference members", decl);
4832 check_for_uninitialized_const_var (decl);
4835 check_for_uninitialized_const_var (decl);
4837 if (init && init != error_mark_node)
4838 init_code = build2 (INIT_EXPR, type, decl, init);
4843 /* If DECL is not a local variable, give it RTL. */
4846 make_rtl_for_nonlocal_decl (tree decl, tree init, const char* asmspec)
4848 int toplev = toplevel_bindings_p ();
4850 const char *filename;
4852 /* Set the DECL_ASSEMBLER_NAME for the object. */
4855 /* The `register' keyword, when used together with an
4856 asm-specification, indicates that the variable should be
4857 placed in a particular register. */
4858 if (TREE_CODE (decl) == VAR_DECL && DECL_REGISTER (decl))
4860 set_user_assembler_name (decl, asmspec);
4861 DECL_HARD_REGISTER (decl) = 1;
4865 if (TREE_CODE (decl) == FUNCTION_DECL
4866 && DECL_BUILT_IN_CLASS (decl) == BUILT_IN_NORMAL)
4867 set_builtin_user_assembler_name (decl, asmspec);
4868 set_user_assembler_name (decl, asmspec);
4872 /* Handle non-variables up front. */
4873 if (TREE_CODE (decl) != VAR_DECL)
4875 rest_of_decl_compilation (decl, toplev, at_eof);
4879 /* If we see a class member here, it should be a static data
4881 if (DECL_LANG_SPECIFIC (decl) && DECL_IN_AGGR_P (decl))
4883 gcc_assert (TREE_STATIC (decl));
4884 /* An in-class declaration of a static data member should be
4885 external; it is only a declaration, and not a definition. */
4886 if (init == NULL_TREE)
4887 gcc_assert (DECL_EXTERNAL (decl));
4890 /* We don't create any RTL for local variables. */
4891 if (DECL_FUNCTION_SCOPE_P (decl) && !TREE_STATIC (decl))
4894 /* We defer emission of local statics until the corresponding
4895 DECL_EXPR is expanded. */
4896 defer_p = DECL_FUNCTION_SCOPE_P (decl) || DECL_VIRTUAL_P (decl);
4898 /* We try to defer namespace-scope static constants so that they are
4899 not emitted into the object file unnecessarily. */
4900 filename = input_filename;
4901 if (!DECL_VIRTUAL_P (decl)
4902 && TREE_READONLY (decl)
4903 && DECL_INITIAL (decl) != NULL_TREE
4904 && DECL_INITIAL (decl) != error_mark_node
4906 && ! EMPTY_CONSTRUCTOR_P (DECL_INITIAL (decl))
4908 && !TREE_PUBLIC (decl))
4910 /* Fool with the linkage of static consts according to #pragma
4912 struct c_fileinfo *finfo = get_fileinfo (filename);
4913 if (!finfo->interface_unknown && !TREE_PUBLIC (decl))
4915 TREE_PUBLIC (decl) = 1;
4916 DECL_EXTERNAL (decl) = finfo->interface_only;
4921 /* Likewise for template instantiations. */
4922 else if (DECL_LANG_SPECIFIC (decl)
4923 && DECL_IMPLICIT_INSTANTIATION (decl))
4926 /* If we're not deferring, go ahead and assemble the variable. */
4928 rest_of_decl_compilation (decl, toplev, at_eof);
4931 /* Generate code to initialize DECL (a local variable). */
4934 initialize_local_var (tree decl, tree init)
4936 tree type = TREE_TYPE (decl);
4939 gcc_assert (TREE_CODE (decl) == VAR_DECL
4940 || TREE_CODE (decl) == RESULT_DECL);
4941 gcc_assert (!TREE_STATIC (decl));
4943 if (DECL_SIZE (decl) == NULL_TREE)
4945 /* If we used it already as memory, it must stay in memory. */
4946 DECL_INITIAL (decl) = NULL_TREE;
4947 TREE_ADDRESSABLE (decl) = TREE_USED (decl);
4950 if (DECL_SIZE (decl) && type != error_mark_node)
4954 /* Compute and store the initial value. */
4955 already_used = TREE_USED (decl) || TREE_USED (type);
4957 /* Perform the initialization. */
4960 int saved_stmts_are_full_exprs_p;
4962 gcc_assert (building_stmt_tree ());
4963 saved_stmts_are_full_exprs_p = stmts_are_full_exprs_p ();
4964 current_stmt_tree ()->stmts_are_full_exprs_p = 1;
4965 finish_expr_stmt (init);
4966 current_stmt_tree ()->stmts_are_full_exprs_p =
4967 saved_stmts_are_full_exprs_p;
4970 /* Set this to 0 so we can tell whether an aggregate which was
4971 initialized was ever used. Don't do this if it has a
4972 destructor, so we don't complain about the 'resource
4973 allocation is initialization' idiom. Now set
4974 attribute((unused)) on types so decls of that type will be
4975 marked used. (see TREE_USED, above.) */
4976 if (TYPE_NEEDS_CONSTRUCTING (type)
4978 && TYPE_HAS_TRIVIAL_DESTRUCTOR (type)
4979 && DECL_NAME (decl))
4980 TREE_USED (decl) = 0;
4981 else if (already_used)
4982 TREE_USED (decl) = 1;
4985 /* Generate a cleanup, if necessary. */
4986 cleanup = cxx_maybe_build_cleanup (decl);
4987 if (DECL_SIZE (decl) && cleanup)
4988 finish_decl_cleanup (decl, cleanup);
4991 /* DECL is a VAR_DECL for a compiler-generated variable with static
4992 storage duration (like a virtual table) whose initializer is a
4993 compile-time constant. INIT must be either a TREE_LIST of values,
4994 or a CONSTRUCTOR. Initialize the variable and provide it to the
4998 initialize_artificial_var (tree decl, tree init)
5000 gcc_assert (DECL_ARTIFICIAL (decl));
5001 if (TREE_CODE (init) == TREE_LIST)
5002 init = build_constructor_from_list (NULL_TREE, init);
5003 gcc_assert (TREE_CODE (init) == CONSTRUCTOR);
5004 DECL_INITIAL (decl) = init;
5005 DECL_INITIALIZED_P (decl) = 1;
5006 determine_visibility (decl);
5007 layout_var_decl (decl);
5008 maybe_commonize_var (decl);
5009 make_rtl_for_nonlocal_decl (decl, init, /*asmspec=*/NULL);
5012 /* Finish processing of a declaration;
5013 install its line number and initial value.
5014 If the length of an array type is not known before,
5015 it must be determined now, from the initial value, or it is an error.
5017 INIT is the initializer (if any) for DECL. If INIT_CONST_EXPR_P is
5018 true, then INIT is an integral constant expression.
5020 FLAGS is LOOKUP_ONLYCONVERTING if the = init syntax was used, else 0
5021 if the (init) syntax was used. */
5024 cp_finish_decl (tree decl, tree init, bool init_const_expr_p,
5025 tree asmspec_tree, int flags)
5029 const char *asmspec = NULL;
5030 int was_readonly = 0;
5031 bool var_definition_p = false;
5032 int saved_processing_template_decl;
5034 if (decl == error_mark_node)
5039 error ("assignment (not initialization) in declaration");
5043 gcc_assert (TREE_CODE (decl) != RESULT_DECL);
5044 /* Parameters are handled by store_parm_decls, not cp_finish_decl. */
5045 gcc_assert (TREE_CODE (decl) != PARM_DECL);
5047 type = TREE_TYPE (decl);
5048 if (type == error_mark_node)
5051 /* Assume no cleanup is required. */
5052 cleanup = NULL_TREE;
5053 saved_processing_template_decl = processing_template_decl;
5055 /* If a name was specified, get the string. */
5056 if (global_scope_p (current_binding_level))
5057 asmspec_tree = maybe_apply_renaming_pragma (decl, asmspec_tree);
5058 if (asmspec_tree && asmspec_tree != error_mark_node)
5059 asmspec = TREE_STRING_POINTER (asmspec_tree);
5061 if (current_class_type
5062 && CP_DECL_CONTEXT (decl) == current_class_type
5063 && TYPE_BEING_DEFINED (current_class_type)
5064 && (DECL_INITIAL (decl) || init))
5065 DECL_INITIALIZED_IN_CLASS_P (decl) = 1;
5067 if (processing_template_decl)
5069 bool type_dependent_p;
5071 /* Add this declaration to the statement-tree. */
5072 if (at_function_scope_p ())
5073 add_decl_expr (decl);
5075 type_dependent_p = dependent_type_p (type);
5077 if (init && init_const_expr_p)
5079 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (decl) = 1;
5080 if (DECL_INTEGRAL_CONSTANT_VAR_P (decl))
5081 TREE_CONSTANT (decl) = 1;
5085 || !DECL_CLASS_SCOPE_P (decl)
5086 || !DECL_INTEGRAL_CONSTANT_VAR_P (decl)
5088 || value_dependent_expression_p (init))
5091 DECL_INITIAL (decl) = init;
5092 if (TREE_CODE (decl) == VAR_DECL
5093 && !DECL_PRETTY_FUNCTION_P (decl)
5094 && !type_dependent_p)
5095 maybe_deduce_size_from_array_init (decl, init);
5099 init = fold_non_dependent_expr (init);
5100 processing_template_decl = 0;
5103 /* Take care of TYPE_DECLs up front. */
5104 if (TREE_CODE (decl) == TYPE_DECL)
5106 if (type != error_mark_node
5107 && IS_AGGR_TYPE (type) && DECL_NAME (decl))
5109 if (TREE_TYPE (DECL_NAME (decl)) && TREE_TYPE (decl) != type)
5110 warning (0, "shadowing previous type declaration of %q#D", decl);
5111 set_identifier_type_value (DECL_NAME (decl), decl);
5114 /* If we have installed this as the canonical typedef for this
5115 type, and that type has not been defined yet, delay emitting
5116 the debug information for it, as we will emit it later. */
5117 if (TYPE_MAIN_DECL (TREE_TYPE (decl)) == decl
5118 && !COMPLETE_TYPE_P (TREE_TYPE (decl)))
5119 TYPE_DECL_SUPPRESS_DEBUG (decl) = 1;
5121 rest_of_decl_compilation (decl, DECL_CONTEXT (decl) == NULL_TREE,
5126 /* A reference will be modified here, as it is initialized. */
5127 if (! DECL_EXTERNAL (decl)
5128 && TREE_READONLY (decl)
5129 && TREE_CODE (type) == REFERENCE_TYPE)
5132 TREE_READONLY (decl) = 0;
5135 if (TREE_CODE (decl) == VAR_DECL)
5137 /* Only PODs can have thread-local storage. Other types may require
5138 various kinds of non-trivial initialization. */
5139 if (DECL_THREAD_LOCAL_P (decl) && !pod_type_p (TREE_TYPE (decl)))
5140 error ("%qD cannot be thread-local because it has non-POD type %qT",
5141 decl, TREE_TYPE (decl));
5142 /* If this is a local variable that will need a mangled name,
5143 register it now. We must do this before processing the
5144 initializer for the variable, since the initialization might
5145 require a guard variable, and since the mangled name of the
5146 guard variable will depend on the mangled name of this
5148 if (!processing_template_decl
5149 && DECL_FUNCTION_SCOPE_P (decl)
5150 && TREE_STATIC (decl)
5151 && !DECL_ARTIFICIAL (decl))
5152 push_local_name (decl);
5153 /* Convert the initializer to the type of DECL, if we have not
5154 already initialized DECL. */
5155 if (!DECL_INITIALIZED_P (decl)
5156 /* If !DECL_EXTERNAL then DECL is being defined. In the
5157 case of a static data member initialized inside the
5158 class-specifier, there can be an initializer even if DECL
5159 is *not* defined. */
5160 && (!DECL_EXTERNAL (decl) || init))
5164 DECL_NONTRIVIALLY_INITIALIZED_P (decl) = 1;
5165 if (init_const_expr_p)
5167 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (decl) = 1;
5168 if (DECL_INTEGRAL_CONSTANT_VAR_P (decl))
5169 TREE_CONSTANT (decl) = 1;
5172 init = check_initializer (decl, init, flags, &cleanup);
5173 /* Thread-local storage cannot be dynamically initialized. */
5174 if (DECL_THREAD_LOCAL_P (decl) && init)
5176 error ("%qD is thread-local and so cannot be dynamically "
5177 "initialized", decl);
5181 /* Check that the initializer for a static data member was a
5182 constant. Although we check in the parser that the
5183 initializer is an integral constant expression, we do not
5184 simplify division-by-zero at the point at which it
5185 occurs. Therefore, in:
5187 struct S { static const int i = 7 / 0; };
5189 we issue an error at this point. It would
5190 probably be better to forbid division by zero in
5191 integral constant expressions. */
5192 if (DECL_EXTERNAL (decl) && init)
5194 error ("%qD cannot be initialized by a non-constant expression"
5195 " when being declared", decl);
5196 DECL_INITIALIZED_IN_CLASS_P (decl) = 0;
5204 The memory occupied by any object of static storage
5205 duration is zero-initialized at program startup before
5206 any other initialization takes place.
5208 We cannot create an appropriate initializer until after
5209 the type of DECL is finalized. If DECL_INITIAL is set,
5210 then the DECL is statically initialized, and any
5211 necessary zero-initialization has already been performed. */
5212 if (TREE_STATIC (decl) && !DECL_INITIAL (decl))
5213 DECL_INITIAL (decl) = build_zero_init (TREE_TYPE (decl),
5214 /*nelts=*/NULL_TREE,
5215 /*static_storage_p=*/true);
5216 /* Remember that the initialization for this variable has
5218 DECL_INITIALIZED_P (decl) = 1;
5219 /* This declaration is the definition of this variable,
5220 unless we are initializing a static data member within
5221 the class specifier. */
5222 if (!DECL_EXTERNAL (decl))
5223 var_definition_p = true;
5225 /* If the variable has an array type, lay out the type, even if
5226 there is no initializer. It is valid to index through the
5227 array, and we must get TYPE_ALIGN set correctly on the array
5229 else if (TREE_CODE (type) == ARRAY_TYPE)
5233 /* Add this declaration to the statement-tree. This needs to happen
5234 after the call to check_initializer so that the DECL_EXPR for a
5235 reference temp is added before the DECL_EXPR for the reference itself. */
5236 if (at_function_scope_p ())
5237 add_decl_expr (decl);
5239 /* Let the middle end know about variables and functions -- but not
5240 static data members in uninstantiated class templates. */
5241 if (!saved_processing_template_decl
5242 && (TREE_CODE (decl) == VAR_DECL
5243 || TREE_CODE (decl) == FUNCTION_DECL))
5245 if (TREE_CODE (decl) == VAR_DECL)
5247 layout_var_decl (decl);
5248 maybe_commonize_var (decl);
5249 if (DECL_NAMESPACE_SCOPE_P (decl) && !TREE_PUBLIC (decl)
5250 && !DECL_THIS_STATIC (decl) && !DECL_ARTIFICIAL (decl))
5252 /* This is a const variable with implicit 'static'. Set
5253 DECL_THIS_STATIC so we can tell it from variables that are
5254 !TREE_PUBLIC because of the anonymous namespace. */
5255 DECL_THIS_STATIC (decl) = 1;
5259 make_rtl_for_nonlocal_decl (decl, init, asmspec);
5261 /* Check for abstractness of the type. Notice that there is no
5262 need to strip array types here since the check for those types
5263 is already done within create_array_type_for_decl. */
5264 if (TREE_CODE (type) == FUNCTION_TYPE
5265 || TREE_CODE (type) == METHOD_TYPE)
5266 abstract_virtuals_error (decl, TREE_TYPE (type));
5268 abstract_virtuals_error (decl, type);
5270 /* This needs to happen after the linkage is set. */
5271 determine_visibility (decl);
5273 if (TREE_CODE (decl) == FUNCTION_DECL
5274 || TREE_TYPE (decl) == error_mark_node)
5275 /* No initialization required. */
5277 else if (DECL_EXTERNAL (decl)
5278 && ! (DECL_LANG_SPECIFIC (decl)
5279 && DECL_NOT_REALLY_EXTERN (decl)))
5282 DECL_INITIAL (decl) = init;
5286 /* A variable definition. */
5287 if (DECL_FUNCTION_SCOPE_P (decl))
5289 /* Initialize the local variable. */
5290 if (processing_template_decl)
5291 DECL_INITIAL (decl) = init;
5292 else if (!TREE_STATIC (decl))
5293 initialize_local_var (decl, init);
5296 /* If a variable is defined, and then a subsequent
5297 definition with external linkage is encountered, we will
5298 get here twice for the same variable. We want to avoid
5299 calling expand_static_init more than once. For variables
5300 that are not static data members, we can call
5301 expand_static_init only when we actually process the
5302 initializer. It is not legal to redeclare a static data
5303 member, so this issue does not arise in that case. */
5304 if (var_definition_p && TREE_STATIC (decl))
5305 expand_static_init (decl, init);
5309 /* If a CLEANUP_STMT was created to destroy a temporary bound to a
5310 reference, insert it in the statement-tree now. */
5312 push_cleanup (decl, cleanup, false);
5315 processing_template_decl = saved_processing_template_decl;
5318 TREE_READONLY (decl) = 1;
5320 /* If this was marked 'used', be sure it will be output. */
5321 if (lookup_attribute ("used", DECL_ATTRIBUTES (decl)))
5322 mark_decl_referenced (decl);
5325 /* This is here for a midend callback from c-common.c. */
5328 finish_decl (tree decl, tree init, tree asmspec_tree)
5330 cp_finish_decl (decl, init, /*init_const_expr_p=*/false, asmspec_tree, 0);
5333 /* Returns a declaration for a VAR_DECL as if:
5335 extern "C" TYPE NAME;
5337 had been seen. Used to create compiler-generated global
5341 declare_global_var (tree name, tree type)
5345 push_to_top_level ();
5346 decl = build_decl (VAR_DECL, name, type);
5347 TREE_PUBLIC (decl) = 1;
5348 DECL_EXTERNAL (decl) = 1;
5349 DECL_ARTIFICIAL (decl) = 1;
5350 /* If the user has explicitly declared this variable (perhaps
5351 because the code we are compiling is part of a low-level runtime
5352 library), then it is possible that our declaration will be merged
5353 with theirs by pushdecl. */
5354 decl = pushdecl (decl);
5355 finish_decl (decl, NULL_TREE, NULL_TREE);
5356 pop_from_top_level ();
5361 /* Returns a pointer to the `atexit' function. Note that if
5362 FLAG_USE_CXA_ATEXIT is nonzero, then this will actually be the new
5363 `__cxa_atexit' function specified in the IA64 C++ ABI. */
5366 get_atexit_node (void)
5373 bool use_aeabi_atexit;
5378 if (flag_use_cxa_atexit)
5380 /* The declaration for `__cxa_atexit' is:
5382 int __cxa_atexit (void (*)(void *), void *, void *)
5384 We build up the argument types and then then function type
5387 use_aeabi_atexit = targetm.cxx.use_aeabi_atexit ();
5388 /* First, build the pointer-to-function type for the first
5390 arg_types = tree_cons (NULL_TREE, ptr_type_node, void_list_node);
5391 fn_type = build_function_type (void_type_node, arg_types);
5392 fn_ptr_type = build_pointer_type (fn_type);
5393 /* Then, build the rest of the argument types. */
5394 arg_types = tree_cons (NULL_TREE, ptr_type_node, void_list_node);
5395 if (use_aeabi_atexit)
5397 arg_types = tree_cons (NULL_TREE, fn_ptr_type, arg_types);
5398 arg_types = tree_cons (NULL_TREE, ptr_type_node, arg_types);
5402 arg_types = tree_cons (NULL_TREE, ptr_type_node, arg_types);
5403 arg_types = tree_cons (NULL_TREE, fn_ptr_type, arg_types);
5405 /* And the final __cxa_atexit type. */
5406 fn_type = build_function_type (integer_type_node, arg_types);
5407 fn_ptr_type = build_pointer_type (fn_type);
5408 if (use_aeabi_atexit)
5409 name = "__aeabi_atexit";
5411 name = "__cxa_atexit";
5415 /* The declaration for `atexit' is:
5417 int atexit (void (*)());
5419 We build up the argument types and then then function type
5421 fn_type = build_function_type (void_type_node, void_list_node);
5422 fn_ptr_type = build_pointer_type (fn_type);
5423 arg_types = tree_cons (NULL_TREE, fn_ptr_type, void_list_node);
5424 /* Build the final atexit type. */
5425 fn_type = build_function_type (integer_type_node, arg_types);
5429 /* Now, build the function declaration. */
5430 push_lang_context (lang_name_c);
5431 atexit_fndecl = build_library_fn_ptr (name, fn_type);
5432 mark_used (atexit_fndecl);
5433 pop_lang_context ();
5434 atexit_node = decay_conversion (atexit_fndecl);
5439 /* Returns the __dso_handle VAR_DECL. */
5442 get_dso_handle_node (void)
5444 if (dso_handle_node)
5445 return dso_handle_node;
5447 /* Declare the variable. */
5448 dso_handle_node = declare_global_var (get_identifier ("__dso_handle"),
5451 return dso_handle_node;
5454 /* Begin a new function with internal linkage whose job will be simply
5455 to destroy some particular variable. */
5457 static GTY(()) int start_cleanup_cnt;
5460 start_cleanup_fn (void)
5467 push_to_top_level ();
5469 /* No need to mangle this. */
5470 push_lang_context (lang_name_c);
5472 /* Build the parameter-types. */
5473 parmtypes = void_list_node;
5474 /* Functions passed to __cxa_atexit take an additional parameter.
5475 We'll just ignore it. After we implement the new calling
5476 convention for destructors, we can eliminate the use of
5477 additional cleanup functions entirely in the -fnew-abi case. */
5478 if (flag_use_cxa_atexit)
5479 parmtypes = tree_cons (NULL_TREE, ptr_type_node, parmtypes);
5480 /* Build the function type itself. */
5481 fntype = build_function_type (void_type_node, parmtypes);
5482 /* Build the name of the function. */
5483 sprintf (name, "__tcf_%d", start_cleanup_cnt++);
5484 /* Build the function declaration. */
5485 fndecl = build_lang_decl (FUNCTION_DECL, get_identifier (name), fntype);
5486 /* It's a function with internal linkage, generated by the
5488 TREE_PUBLIC (fndecl) = 0;
5489 DECL_ARTIFICIAL (fndecl) = 1;
5490 /* Make the function `inline' so that it is only emitted if it is
5491 actually needed. It is unlikely that it will be inlined, since
5492 it is only called via a function pointer, but we avoid unnecessary
5493 emissions this way. */
5494 DECL_INLINE (fndecl) = 1;
5495 DECL_DECLARED_INLINE_P (fndecl) = 1;
5496 DECL_INTERFACE_KNOWN (fndecl) = 1;
5497 /* Build the parameter. */
5498 if (flag_use_cxa_atexit)
5502 parmdecl = cp_build_parm_decl (NULL_TREE, ptr_type_node);
5503 DECL_CONTEXT (parmdecl) = fndecl;
5504 TREE_USED (parmdecl) = 1;
5505 DECL_ARGUMENTS (fndecl) = parmdecl;
5509 start_preparsed_function (fndecl, NULL_TREE, SF_PRE_PARSED);
5511 pop_lang_context ();
5513 return current_function_decl;
5516 /* Finish the cleanup function begun by start_cleanup_fn. */
5519 end_cleanup_fn (void)
5521 expand_or_defer_fn (finish_function (0));
5523 pop_from_top_level ();
5526 /* Generate code to handle the destruction of DECL, an object with
5527 static storage duration. */
5530 register_dtor_fn (tree decl)
5537 if (TYPE_HAS_TRIVIAL_DESTRUCTOR (TREE_TYPE (decl)))
5538 return void_zero_node;
5540 /* Call build_cleanup before we enter the anonymous function so that
5541 any access checks will be done relative to the current scope,
5542 rather than the scope of the anonymous function. */
5543 build_cleanup (decl);
5545 /* Now start the function. */
5546 cleanup = start_cleanup_fn ();
5548 /* Now, recompute the cleanup. It may contain SAVE_EXPRs that refer
5549 to the original function, rather than the anonymous one. That
5550 will make the back-end think that nested functions are in use,
5551 which causes confusion. */
5553 push_deferring_access_checks (dk_no_check);
5554 fcall = build_cleanup (decl);
5555 pop_deferring_access_checks ();
5557 /* Create the body of the anonymous function. */
5558 compound_stmt = begin_compound_stmt (BCS_FN_BODY);
5559 finish_expr_stmt (fcall);
5560 finish_compound_stmt (compound_stmt);
5563 /* Call atexit with the cleanup function. */
5564 cxx_mark_addressable (cleanup);
5565 mark_used (cleanup);
5566 cleanup = build_unary_op (ADDR_EXPR, cleanup, 0);
5567 if (flag_use_cxa_atexit)
5569 args = tree_cons (NULL_TREE,
5570 build_unary_op (ADDR_EXPR, get_dso_handle_node (), 0),
5572 if (targetm.cxx.use_aeabi_atexit ())
5574 args = tree_cons (NULL_TREE, cleanup, args);
5575 args = tree_cons (NULL_TREE, null_pointer_node, args);
5579 args = tree_cons (NULL_TREE, null_pointer_node, args);
5580 args = tree_cons (NULL_TREE, cleanup, args);
5584 args = tree_cons (NULL_TREE, cleanup, NULL_TREE);
5585 return build_function_call (get_atexit_node (), args);
5588 /* DECL is a VAR_DECL with static storage duration. INIT, if present,
5589 is its initializer. Generate code to handle the construction
5590 and destruction of DECL. */
5593 expand_static_init (tree decl, tree init)
5595 gcc_assert (TREE_CODE (decl) == VAR_DECL);
5596 gcc_assert (TREE_STATIC (decl));
5598 /* Some variables require no initialization. */
5600 && !TYPE_NEEDS_CONSTRUCTING (TREE_TYPE (decl))
5601 && TYPE_HAS_TRIVIAL_DESTRUCTOR (TREE_TYPE (decl)))
5604 if (DECL_FUNCTION_SCOPE_P (decl))
5606 /* Emit code to perform this initialization but once. */
5607 tree if_stmt = NULL_TREE, inner_if_stmt = NULL_TREE;
5608 tree then_clause = NULL_TREE, inner_then_clause = NULL_TREE;
5609 tree guard, guard_addr, guard_addr_list;
5610 tree acquire_fn, release_fn, abort_fn;
5613 /* Emit code to perform this initialization but once. This code
5616 static <type> guard;
5617 if (!guard.first_byte) {
5618 if (__cxa_guard_acquire (&guard)) {
5621 // Do initialization.
5622 flag = true; __cxa_guard_release (&guard);
5623 // Register variable for destruction at end of program.
5625 if (!flag) __cxa_guard_abort (&guard);
5629 Note that the `flag' variable is only set to 1 *after* the
5630 initialization is complete. This ensures that an exception,
5631 thrown during the construction, will cause the variable to
5632 reinitialized when we pass through this code again, as per:
5636 If the initialization exits by throwing an exception, the
5637 initialization is not complete, so it will be tried again
5638 the next time control enters the declaration.
5640 This process should be thread-safe, too; multiple threads
5641 should not be able to initialize the variable more than
5644 /* Create the guard variable. */
5645 guard = get_guard (decl);
5647 /* This optimization isn't safe on targets with relaxed memory
5648 consistency. On such targets we force synchronization in
5649 __cxa_guard_acquire. */
5650 if (!targetm.relaxed_ordering || !flag_threadsafe_statics)
5652 /* Begin the conditional initialization. */
5653 if_stmt = begin_if_stmt ();
5654 finish_if_stmt_cond (get_guard_cond (guard), if_stmt);
5655 then_clause = begin_compound_stmt (BCS_NO_SCOPE);
5658 if (flag_threadsafe_statics)
5660 guard_addr = build_address (guard);
5661 guard_addr_list = build_tree_list (NULL_TREE, guard_addr);
5663 acquire_fn = get_identifier ("__cxa_guard_acquire");
5664 release_fn = get_identifier ("__cxa_guard_release");
5665 abort_fn = get_identifier ("__cxa_guard_abort");
5666 if (!get_global_value_if_present (acquire_fn, &acquire_fn))
5668 tree argtypes = tree_cons (NULL_TREE, TREE_TYPE (guard_addr),
5670 tree vfntype = build_function_type (void_type_node, argtypes);
5671 acquire_fn = push_library_fn
5672 (acquire_fn, build_function_type (integer_type_node, argtypes));
5673 release_fn = push_library_fn (release_fn, vfntype);
5674 abort_fn = push_library_fn (abort_fn, vfntype);
5678 release_fn = identifier_global_value (release_fn);
5679 abort_fn = identifier_global_value (abort_fn);
5682 inner_if_stmt = begin_if_stmt ();
5683 finish_if_stmt_cond (build_call (acquire_fn, guard_addr_list),
5686 inner_then_clause = begin_compound_stmt (BCS_NO_SCOPE);
5687 begin = get_target_expr (boolean_false_node);
5688 flag = TARGET_EXPR_SLOT (begin);
5690 TARGET_EXPR_CLEANUP (begin)
5691 = build3 (COND_EXPR, void_type_node, flag,
5693 build_call (abort_fn, guard_addr_list));
5694 CLEANUP_EH_ONLY (begin) = 1;
5696 /* Do the initialization itself. */
5697 init = add_stmt_to_compound (begin, init);
5698 init = add_stmt_to_compound
5699 (init, build2 (MODIFY_EXPR, void_type_node, flag, boolean_true_node));
5700 init = add_stmt_to_compound
5701 (init, build_call (release_fn, guard_addr_list));
5704 init = add_stmt_to_compound (init, set_guard (guard));
5706 /* Use atexit to register a function for destroying this static
5708 init = add_stmt_to_compound (init, register_dtor_fn (decl));
5710 finish_expr_stmt (init);
5712 if (flag_threadsafe_statics)
5714 finish_compound_stmt (inner_then_clause);
5715 finish_then_clause (inner_if_stmt);
5716 finish_if_stmt (inner_if_stmt);
5719 if (!targetm.relaxed_ordering || !flag_threadsafe_statics)
5721 finish_compound_stmt (then_clause);
5722 finish_then_clause (if_stmt);
5723 finish_if_stmt (if_stmt);
5727 static_aggregates = tree_cons (init, decl, static_aggregates);
5731 /* Make TYPE a complete type based on INITIAL_VALUE.
5732 Return 0 if successful, 1 if INITIAL_VALUE can't be deciphered,
5733 2 if there was no information (in which case assume 0 if DO_DEFAULT),
5734 3 if the initializer list is empty (in pedantic mode). */
5737 cp_complete_array_type (tree *ptype, tree initial_value, bool do_default)
5740 tree type, elt_type;
5744 /* An array of character type can be initialized from a
5745 brace-enclosed string constant.
5747 FIXME: this code is duplicated from reshape_init. Probably
5748 we should just call reshape_init here? */
5749 if (char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (*ptype)))
5750 && TREE_CODE (initial_value) == CONSTRUCTOR
5751 && !VEC_empty (constructor_elt, CONSTRUCTOR_ELTS (initial_value)))
5753 VEC(constructor_elt,gc) *v = CONSTRUCTOR_ELTS (initial_value);
5754 tree value = VEC_index (constructor_elt, v, 0)->value;
5756 if (TREE_CODE (value) == STRING_CST
5757 && VEC_length (constructor_elt, v) == 1)
5758 initial_value = value;
5762 failure = complete_array_type (ptype, initial_value, do_default);
5764 /* We can create the array before the element type is complete, which
5765 means that we didn't have these two bits set in the original type
5766 either. In completing the type, we are expected to propagate these
5767 bits. See also complete_type which does the same thing for arrays
5770 if (TYPE_DOMAIN (type))
5772 elt_type = TREE_TYPE (type);
5773 TYPE_NEEDS_CONSTRUCTING (type) = TYPE_NEEDS_CONSTRUCTING (elt_type);
5774 TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type)
5775 = TYPE_HAS_NONTRIVIAL_DESTRUCTOR (elt_type);
5781 /* Return zero if something is declared to be a member of type
5782 CTYPE when in the context of CUR_TYPE. STRING is the error
5783 message to print in that case. Otherwise, quietly return 1. */
5786 member_function_or_else (tree ctype, tree cur_type, enum overload_flags flags)
5788 if (ctype && ctype != cur_type)
5790 if (flags == DTOR_FLAG)
5791 error ("destructor for alien class %qT cannot be a member", ctype);
5793 error ("constructor for alien class %qT cannot be a member", ctype);
5799 /* Subroutine of `grokdeclarator'. */
5801 /* Generate errors possibly applicable for a given set of specifiers.
5802 This is for ARM $7.1.2. */
5805 bad_specifiers (tree object,
5814 error ("%qD declared as a %<virtual%> %s", object, type);
5816 error ("%qD declared as an %<inline%> %s", object, type);
5818 error ("%<const%> and %<volatile%> function specifiers on "
5819 "%qD invalid in %s declaration",
5822 error ("%q+D declared as a friend", object);
5824 && (TREE_CODE (object) == TYPE_DECL
5825 || (!TYPE_PTRFN_P (TREE_TYPE (object))
5826 && !TYPE_REFFN_P (TREE_TYPE (object))
5827 && !TYPE_PTRMEMFUNC_P (TREE_TYPE (object)))))
5828 error ("%q+D declared with an exception specification", object);
5831 /* DECL is a member function or static data member and is presently
5832 being defined. Check that the definition is taking place in a
5836 check_class_member_definition_namespace (tree decl)
5838 /* These checks only apply to member functions and static data
5840 gcc_assert (TREE_CODE (decl) == FUNCTION_DECL
5841 || TREE_CODE (decl) == VAR_DECL);
5842 /* We check for problems with specializations in pt.c in
5843 check_specialization_namespace, where we can issue better
5845 if (processing_specialization)
5847 /* There are no restrictions on the placement of
5848 explicit instantiations. */
5849 if (processing_explicit_instantiation)
5853 A member function definition that appears outside of the
5854 class definition shall appear in a namespace scope enclosing
5855 the class definition.
5859 The definition for a static data member shall appear in a
5860 namespace scope enclosing the member's class definition. */
5861 if (!is_ancestor (current_namespace, DECL_CONTEXT (decl)))
5862 pedwarn ("definition of %qD is not in namespace enclosing %qT",
5863 decl, DECL_CONTEXT (decl));
5866 /* Build a PARM_DECL for the "this" parameter. TYPE is the
5867 METHOD_TYPE for a non-static member function; QUALS are the
5868 cv-qualifiers that apply to the function. */
5871 build_this_parm (tree type, cp_cv_quals quals)
5876 cp_cv_quals this_quals;
5878 this_type = TREE_VALUE (TYPE_ARG_TYPES (type));
5879 /* The `this' parameter is implicitly `const'; it cannot be
5881 this_quals = (quals & TYPE_QUAL_RESTRICT) | TYPE_QUAL_CONST;
5882 qual_type = cp_build_qualified_type (this_type, this_quals);
5883 parm = build_artificial_parm (this_identifier, qual_type);
5884 cp_apply_type_quals_to_decl (this_quals, parm);
5888 /* CTYPE is class type, or null if non-class.
5889 TYPE is type this FUNCTION_DECL should have, either FUNCTION_TYPE
5891 DECLARATOR is the function's name.
5892 PARMS is a chain of PARM_DECLs for the function.
5893 VIRTUALP is truthvalue of whether the function is virtual or not.
5894 FLAGS are to be passed through to `grokclassfn'.
5895 QUALS are qualifiers indicating whether the function is `const'
5897 RAISES is a list of exceptions that this function can raise.
5898 CHECK is 1 if we must find this method in CTYPE, 0 if we should
5899 not look, and -1 if we should not call `grokclassfn' at all.
5901 SFK is the kind of special function (if any) for the new function.
5903 Returns `NULL_TREE' if something goes wrong, after issuing
5904 applicable error messages. */
5907 grokfndecl (tree ctype,
5911 tree orig_declarator,
5913 enum overload_flags flags,
5920 special_function_kind sfk,
5927 int staticp = ctype && TREE_CODE (type) == FUNCTION_TYPE;
5931 type = build_exception_variant (type, raises);
5933 decl = build_lang_decl (FUNCTION_DECL, declarator, type);
5934 if (TREE_CODE (type) == METHOD_TYPE)
5937 parm = build_this_parm (type, quals);
5938 TREE_CHAIN (parm) = parms;
5941 DECL_ARGUMENTS (decl) = parms;
5942 /* Propagate volatile out from type to decl. */
5943 if (TYPE_VOLATILE (type))
5944 TREE_THIS_VOLATILE (decl) = 1;
5947 && TREE_CODE (orig_declarator) == TEMPLATE_ID_EXPR)
5951 ("defining explicit specialization %qD in friend declaration",
5955 tree fns = TREE_OPERAND (orig_declarator, 0);
5956 tree args = TREE_OPERAND (orig_declarator, 1);
5958 if (PROCESSING_REAL_TEMPLATE_DECL_P ())
5960 /* Something like `template <class T> friend void f<T>()'. */
5961 error ("invalid use of template-id %qD in declaration "
5962 "of primary template",
5968 /* A friend declaration of the form friend void f<>(). Record
5969 the information in the TEMPLATE_ID_EXPR. */
5970 SET_DECL_IMPLICIT_INSTANTIATION (decl);
5972 if (TREE_CODE (fns) == COMPONENT_REF)
5974 /* Due to bison parser ickiness, we will have already looked
5975 up an operator_name or PFUNCNAME within the current class
5976 (see template_id in parse.y). If the current class contains
5977 such a name, we'll get a COMPONENT_REF here. Undo that. */
5979 gcc_assert (TREE_TYPE (TREE_OPERAND (fns, 0))
5980 == current_class_type);
5981 fns = TREE_OPERAND (fns, 1);
5983 gcc_assert (TREE_CODE (fns) == IDENTIFIER_NODE
5984 || TREE_CODE (fns) == OVERLOAD);
5985 DECL_TEMPLATE_INFO (decl) = tree_cons (fns, args, NULL_TREE);
5987 for (t = TYPE_ARG_TYPES (TREE_TYPE (decl)); t; t = TREE_CHAIN (t))
5988 if (TREE_PURPOSE (t)
5989 && TREE_CODE (TREE_PURPOSE (t)) == DEFAULT_ARG)
5991 error ("default arguments are not allowed in declaration "
5992 "of friend template specialization %qD",
5999 error ("%<inline%> is not allowed in declaration of friend "
6000 "template specialization %qD",
6007 /* If this decl has namespace scope, set that up. */
6009 set_decl_namespace (decl, in_namespace, friendp);
6011 DECL_CONTEXT (decl) = FROB_CONTEXT (current_namespace);
6013 /* `main' and builtins have implicit 'C' linkage. */
6014 if ((MAIN_NAME_P (declarator)
6015 || (IDENTIFIER_LENGTH (declarator) > 10
6016 && IDENTIFIER_POINTER (declarator)[0] == '_'
6017 && IDENTIFIER_POINTER (declarator)[1] == '_'
6018 && strncmp (IDENTIFIER_POINTER (declarator)+2, "builtin_", 8) == 0))
6019 && current_lang_name == lang_name_cplusplus
6020 && ctype == NULL_TREE
6021 /* NULL_TREE means global namespace. */
6022 && DECL_CONTEXT (decl) == NULL_TREE)
6023 SET_DECL_LANGUAGE (decl, lang_c);
6025 /* Should probably propagate const out from type to decl I bet (mrs). */
6028 DECL_STATIC_FUNCTION_P (decl) = 1;
6029 DECL_CONTEXT (decl) = ctype;
6034 DECL_CONTEXT (decl) = ctype;
6036 check_class_member_definition_namespace (decl);
6039 if (ctype == NULL_TREE && DECL_MAIN_P (decl))
6041 if (processing_template_decl)
6042 error ("cannot declare %<::main%> to be a template");
6044 error ("cannot declare %<::main%> to be inline");
6046 error ("cannot declare %<::main%> to be static");
6047 if (!same_type_p (TREE_TYPE (TREE_TYPE (decl)),
6050 tree oldtypeargs = TYPE_ARG_TYPES (TREE_TYPE (decl));
6052 error ("%<::main%> must return %<int%>");
6053 newtype = build_function_type (integer_type_node,
6055 TREE_TYPE (decl) = newtype;
6061 /* Members of anonymous types and local classes have no linkage; make
6062 them internal. If a typedef is made later, this will be changed. */
6063 if (ctype && (TYPE_ANONYMOUS_P (ctype)
6064 || decl_function_context (TYPE_MAIN_DECL (ctype))))
6069 /* [basic.link]: A name with no linkage (notably, the name of a class
6070 or enumeration declared in a local scope) shall not be used to
6071 declare an entity with linkage.
6073 Only check this for public decls for now. See core 319, 389. */
6074 t = no_linkage_check (TREE_TYPE (decl),
6075 /*relaxed_p=*/false);
6078 if (TYPE_ANONYMOUS_P (t))
6080 if (DECL_EXTERN_C_P (decl))
6081 /* Allow this; it's pretty common in C. */;
6084 pedwarn ("non-local function %q#D uses anonymous type",
6086 if (DECL_ORIGINAL_TYPE (TYPE_NAME (t)))
6087 pedwarn ("%q+#D does not refer to the unqualified "
6088 "type, so it is not used for linkage",
6093 pedwarn ("non-local function %q#D uses local type %qT", decl, t);
6097 TREE_PUBLIC (decl) = publicp;
6100 DECL_INTERFACE_KNOWN (decl) = 1;
6101 DECL_NOT_REALLY_EXTERN (decl) = 1;
6104 /* If the declaration was declared inline, mark it as such. */
6106 DECL_DECLARED_INLINE_P (decl) = 1;
6107 /* We inline functions that are explicitly declared inline, or, when
6108 the user explicitly asks us to, all functions. */
6109 if (DECL_DECLARED_INLINE_P (decl)
6110 || (flag_inline_trees == 2 && !DECL_INLINE (decl) && funcdef_flag))
6111 DECL_INLINE (decl) = 1;
6113 DECL_EXTERNAL (decl) = 1;
6114 if (quals && TREE_CODE (type) == FUNCTION_TYPE)
6116 error ("%smember function %qD cannot have cv-qualifier",
6117 (ctype ? "static " : "non-"), decl);
6118 quals = TYPE_UNQUALIFIED;
6121 if (IDENTIFIER_OPNAME_P (DECL_NAME (decl))
6122 && !grok_op_properties (decl, /*complain=*/true))
6125 if (ctype && decl_function_context (decl))
6126 DECL_NO_STATIC_CHAIN (decl) = 1;
6129 /* Make the init_value nonzero so pushdecl knows this is not
6130 tentative. error_mark_node is replaced later with the BLOCK. */
6131 DECL_INITIAL (decl) = error_mark_node;
6133 if (TYPE_NOTHROW_P (type) || nothrow_libfn_p (decl))
6134 TREE_NOTHROW (decl) = 1;
6136 /* Caller will do the rest of this. */
6140 if (ctype != NULL_TREE)
6142 if (sfk == sfk_constructor)
6143 DECL_CONSTRUCTOR_P (decl) = 1;
6145 grokclassfn (ctype, decl, flags);
6148 decl = check_explicit_specialization (orig_declarator, decl,
6151 4 * (friendp != 0));
6152 if (decl == error_mark_node)
6157 cplus_decl_attributes (&decl, *attrlist, 0);
6158 *attrlist = NULL_TREE;
6161 if (ctype != NULL_TREE
6162 && (! TYPE_FOR_JAVA (ctype) || check_java_method (decl))
6167 old_decl = check_classfn (ctype, decl,
6168 (processing_template_decl
6169 > template_class_depth (ctype))
6170 ? current_template_parms
6177 if (TREE_CODE (old_decl) == TEMPLATE_DECL)
6178 /* Because grokfndecl is always supposed to return a
6179 FUNCTION_DECL, we pull out the DECL_TEMPLATE_RESULT
6180 here. We depend on our callers to figure out that its
6181 really a template that's being returned. */
6182 old_decl = DECL_TEMPLATE_RESULT (old_decl);
6184 if (DECL_STATIC_FUNCTION_P (old_decl)
6185 && TREE_CODE (TREE_TYPE (decl)) == METHOD_TYPE)
6186 /* Remove the `this' parm added by grokclassfn.
6187 XXX Isn't this done in start_function, too? */
6188 revert_static_member_fn (decl);
6189 if (DECL_ARTIFICIAL (old_decl))
6190 error ("definition of implicitly-declared %qD", old_decl);
6192 /* Since we've smashed OLD_DECL to its
6193 DECL_TEMPLATE_RESULT, we must do the same to DECL. */
6194 if (TREE_CODE (decl) == TEMPLATE_DECL)
6195 decl = DECL_TEMPLATE_RESULT (decl);
6197 /* Attempt to merge the declarations. This can fail, in
6198 the case of some invalid specialization declarations. */
6199 pushed_scope = push_scope (ctype);
6200 ok = duplicate_decls (decl, old_decl, friendp);
6202 pop_scope (pushed_scope);
6205 error ("no %q#D member function declared in class %qT",
6213 if (DECL_CONSTRUCTOR_P (decl) && !grok_ctor_properties (ctype, decl))
6216 if (ctype == NULL_TREE || check)
6220 DECL_VIRTUAL_P (decl) = 1;
6225 /* DECL is a VAR_DECL for a static data member. Set flags to reflect
6226 the linkage that DECL will receive in the object file. */
6229 set_linkage_for_static_data_member (tree decl)
6231 /* A static data member always has static storage duration and
6232 external linkage. Note that static data members are forbidden in
6233 local classes -- the only situation in which a class has
6234 non-external linkage. */
6235 TREE_PUBLIC (decl) = 1;
6236 TREE_STATIC (decl) = 1;
6237 /* For non-template classes, static data members are always put
6238 out in exactly those files where they are defined, just as
6239 with ordinary namespace-scope variables. */
6240 if (!processing_template_decl)
6241 DECL_INTERFACE_KNOWN (decl) = 1;
6244 /* Create a VAR_DECL named NAME with the indicated TYPE.
6246 If SCOPE is non-NULL, it is the class type or namespace containing
6247 the variable. If SCOPE is NULL, the variable should is created in
6248 the innermost enclosings scope. */
6251 grokvardecl (tree type,
6253 const cp_decl_specifier_seq *declspecs,
6259 tree explicit_scope;
6261 gcc_assert (!name || TREE_CODE (name) == IDENTIFIER_NODE);
6263 /* Compute the scope in which to place the variable, but remember
6264 whether or not that scope was explicitly specified by the user. */
6265 explicit_scope = scope;
6268 /* An explicit "extern" specifier indicates a namespace-scope
6270 if (declspecs->storage_class == sc_extern)
6271 scope = current_namespace;
6272 else if (!at_function_scope_p ())
6273 scope = current_scope ();
6277 && (/* If the variable is a namespace-scope variable declared in a
6278 template, we need DECL_LANG_SPECIFIC. */
6279 (TREE_CODE (scope) == NAMESPACE_DECL && processing_template_decl)
6280 /* Similarly for namespace-scope variables with language linkage
6282 || (TREE_CODE (scope) == NAMESPACE_DECL
6283 && current_lang_name != lang_name_cplusplus)
6284 /* Similarly for static data members. */
6286 decl = build_lang_decl (VAR_DECL, name, type);
6288 decl = build_decl (VAR_DECL, name, type);
6290 if (explicit_scope && TREE_CODE (explicit_scope) == NAMESPACE_DECL)
6291 set_decl_namespace (decl, explicit_scope, 0);
6293 DECL_CONTEXT (decl) = FROB_CONTEXT (scope);
6295 if (declspecs->storage_class == sc_extern)
6297 DECL_THIS_EXTERN (decl) = 1;
6298 DECL_EXTERNAL (decl) = !initialized;
6301 if (DECL_CLASS_SCOPE_P (decl))
6303 set_linkage_for_static_data_member (decl);
6304 /* This function is only called with out-of-class definitions. */
6305 DECL_EXTERNAL (decl) = 0;
6306 check_class_member_definition_namespace (decl);
6308 /* At top level, either `static' or no s.c. makes a definition
6309 (perhaps tentative), and absence of `static' makes it public. */
6310 else if (toplevel_bindings_p ())
6312 TREE_PUBLIC (decl) = (declspecs->storage_class != sc_static
6313 && (DECL_THIS_EXTERN (decl) || ! constp));
6314 TREE_STATIC (decl) = ! DECL_EXTERNAL (decl);
6316 /* Not at top level, only `static' makes a static definition. */
6319 TREE_STATIC (decl) = declspecs->storage_class == sc_static;
6320 TREE_PUBLIC (decl) = DECL_EXTERNAL (decl);
6323 if (declspecs->specs[(int)ds_thread])
6325 if (targetm.have_tls)
6326 DECL_TLS_MODEL (decl) = decl_default_tls_model (decl);
6328 /* A mere warning is sure to result in improper semantics
6329 at runtime. Don't bother to allow this to compile. */
6330 error ("thread-local storage not supported for this target");
6333 if (TREE_PUBLIC (decl))
6335 /* [basic.link]: A name with no linkage (notably, the name of a class
6336 or enumeration declared in a local scope) shall not be used to
6337 declare an entity with linkage.
6339 Only check this for public decls for now. */
6340 tree t = no_linkage_check (TREE_TYPE (decl), /*relaxed_p=*/false);
6343 if (TYPE_ANONYMOUS_P (t))
6345 if (DECL_EXTERN_C_P (decl))
6346 /* Allow this; it's pretty common in C. */
6350 /* DRs 132, 319 and 389 seem to indicate types with
6351 no linkage can only be used to declare extern "C"
6352 entities. Since it's not always an error in the
6353 ISO C++ 90 Standard, we only issue a warning. */
6354 warning (0, "non-local variable %q#D uses anonymous type",
6356 if (DECL_ORIGINAL_TYPE (TYPE_NAME (t)))
6357 warning (0, "%q+#D does not refer to the unqualified "
6358 "type, so it is not used for linkage",
6363 warning (0, "non-local variable %q#D uses local type %qT", decl, t);
6367 DECL_INTERFACE_KNOWN (decl) = 1;
6372 /* Create and return a canonical pointer to member function type, for
6373 TYPE, which is a POINTER_TYPE to a METHOD_TYPE. */
6376 build_ptrmemfunc_type (tree type)
6380 tree unqualified_variant = NULL_TREE;
6382 if (type == error_mark_node)
6385 /* If a canonical type already exists for this type, use it. We use
6386 this method instead of type_hash_canon, because it only does a
6387 simple equality check on the list of field members. */
6389 if ((t = TYPE_GET_PTRMEMFUNC_TYPE (type)))
6392 /* Make sure that we always have the unqualified pointer-to-member
6394 if (cp_type_quals (type) != TYPE_UNQUALIFIED)
6396 = build_ptrmemfunc_type (TYPE_MAIN_VARIANT (type));
6398 t = make_aggr_type (RECORD_TYPE);
6399 xref_basetypes (t, NULL_TREE);
6401 /* Let the front-end know this is a pointer to member function... */
6402 TYPE_PTRMEMFUNC_FLAG (t) = 1;
6403 /* ... and not really an aggregate. */
6404 SET_IS_AGGR_TYPE (t, 0);
6406 field = build_decl (FIELD_DECL, pfn_identifier, type);
6409 field = build_decl (FIELD_DECL, delta_identifier, delta_type_node);
6410 TREE_CHAIN (field) = fields;
6413 finish_builtin_struct (t, "__ptrmemfunc_type", fields, ptr_type_node);
6415 /* Zap out the name so that the back-end will give us the debugging
6416 information for this anonymous RECORD_TYPE. */
6417 TYPE_NAME (t) = NULL_TREE;
6419 /* If this is not the unqualified form of this pointer-to-member
6420 type, set the TYPE_MAIN_VARIANT for this type to be the
6421 unqualified type. Since they are actually RECORD_TYPEs that are
6422 not variants of each other, we must do this manually. */
6423 if (cp_type_quals (type) != TYPE_UNQUALIFIED)
6425 t = build_qualified_type (t, cp_type_quals (type));
6426 TYPE_MAIN_VARIANT (t) = unqualified_variant;
6427 TYPE_NEXT_VARIANT (t) = TYPE_NEXT_VARIANT (unqualified_variant);
6428 TYPE_NEXT_VARIANT (unqualified_variant) = t;
6431 /* Cache this pointer-to-member type so that we can find it again
6433 TYPE_SET_PTRMEMFUNC_TYPE (type, t);
6438 /* Create and return a pointer to data member type. */
6441 build_ptrmem_type (tree class_type, tree member_type)
6443 if (TREE_CODE (member_type) == METHOD_TYPE)
6447 arg_types = TYPE_ARG_TYPES (member_type);
6448 class_type = (cp_build_qualified_type
6450 cp_type_quals (TREE_TYPE (TREE_VALUE (arg_types)))));
6452 = build_method_type_directly (class_type,
6453 TREE_TYPE (member_type),
6454 TREE_CHAIN (arg_types));
6455 return build_ptrmemfunc_type (build_pointer_type (member_type));
6459 gcc_assert (TREE_CODE (member_type) != FUNCTION_TYPE);
6460 return build_offset_type (class_type, member_type);
6464 /* DECL is a VAR_DECL defined in-class, whose TYPE is also given.
6465 Check to see that the definition is valid. Issue appropriate error
6466 messages. Return 1 if the definition is particularly bad, or 0
6470 check_static_variable_definition (tree decl, tree type)
6472 /* Motion 10 at San Diego: If a static const integral data member is
6473 initialized with an integral constant expression, the initializer
6474 may appear either in the declaration (within the class), or in
6475 the definition, but not both. If it appears in the class, the
6476 member is a member constant. The file-scope definition is always
6478 if (!ARITHMETIC_TYPE_P (type) && TREE_CODE (type) != ENUMERAL_TYPE)
6480 error ("invalid in-class initialization of static data member "
6481 "of non-integral type %qT",
6483 /* If we just return the declaration, crashes will sometimes
6484 occur. We therefore return void_type_node, as if this were a
6485 friend declaration, to cause callers to completely ignore
6486 this declaration. */
6489 else if (!CP_TYPE_CONST_P (type))
6490 error ("ISO C++ forbids in-class initialization of non-const "
6491 "static member %qD",
6493 else if (pedantic && !INTEGRAL_TYPE_P (type))
6494 pedwarn ("ISO C++ forbids initialization of member constant "
6495 "%qD of non-integral type %qT", decl, type);
6500 /* Given the SIZE (i.e., number of elements) in an array, compute an
6501 appropriate index type for the array. If non-NULL, NAME is the
6502 name of the thing being declared. */
6505 compute_array_index_type (tree name, tree size)
6510 if (error_operand_p (size))
6511 return error_mark_node;
6513 type = TREE_TYPE (size);
6514 /* The array bound must be an integer type. */
6515 if (!dependent_type_p (type) && !INTEGRAL_TYPE_P (type))
6518 error ("size of array %qD has non-integral type %qT", name, type);
6520 error ("size of array has non-integral type %qT", type);
6521 size = integer_one_node;
6522 type = TREE_TYPE (size);
6525 if (abi_version_at_least (2)
6526 /* We should only handle value dependent expressions specially. */
6527 ? value_dependent_expression_p (size)
6528 /* But for abi-1, we handled all instances in templates. This
6529 effects the manglings produced. */
6530 : processing_template_decl)
6531 return build_index_type (build_min (MINUS_EXPR, sizetype,
6532 size, integer_one_node));
6534 /* The size might be the result of a cast. */
6535 STRIP_TYPE_NOPS (size);
6537 /* It might be a const variable or enumeration constant. */
6538 size = integral_constant_value (size);
6540 /* Normally, the array-bound will be a constant. */
6541 if (TREE_CODE (size) == INTEGER_CST)
6543 /* Check to see if the array bound overflowed. Make that an
6544 error, no matter how generous we're being. */
6545 int old_flag_pedantic_errors = flag_pedantic_errors;
6546 int old_pedantic = pedantic;
6547 pedantic = flag_pedantic_errors = 1;
6548 constant_expression_warning (size);
6549 pedantic = old_pedantic;
6550 flag_pedantic_errors = old_flag_pedantic_errors;
6552 /* An array must have a positive number of elements. */
6553 if (INT_CST_LT (size, integer_zero_node))
6556 error ("size of array %qD is negative", name);
6558 error ("size of array is negative");
6559 size = integer_one_node;
6561 /* As an extension we allow zero-sized arrays. We always allow
6562 them in system headers because glibc uses them. */
6563 else if (integer_zerop (size) && pedantic && !in_system_header)
6566 pedwarn ("ISO C++ forbids zero-size array %qD", name);
6568 pedwarn ("ISO C++ forbids zero-size array");
6571 else if (TREE_CONSTANT (size))
6573 /* `(int) &fn' is not a valid array bound. */
6575 error ("size of array %qD is not an integral constant-expression",
6578 error ("size of array is not an integral constant-expression");
6579 size = integer_one_node;
6584 pedwarn ("ISO C++ forbids variable-size array %qD", name);
6586 pedwarn ("ISO C++ forbids variable-size array");
6589 if (processing_template_decl && !TREE_CONSTANT (size))
6590 /* A variable sized array. */
6591 itype = build_min (MINUS_EXPR, sizetype, size, integer_one_node);
6594 HOST_WIDE_INT saved_processing_template_decl;
6596 /* Compute the index of the largest element in the array. It is
6597 one less than the number of elements in the array. We save
6598 and restore PROCESSING_TEMPLATE_DECL so that computations in
6599 cp_build_binary_op will be appropriately folded. */
6600 saved_processing_template_decl = processing_template_decl;
6601 processing_template_decl = 0;
6602 itype = cp_build_binary_op (MINUS_EXPR,
6603 cp_convert (ssizetype, size),
6604 cp_convert (ssizetype, integer_one_node));
6605 itype = fold (itype);
6606 processing_template_decl = saved_processing_template_decl;
6608 if (!TREE_CONSTANT (itype))
6609 /* A variable sized array. */
6610 itype = variable_size (itype);
6611 /* Make sure that there was no overflow when creating to a signed
6612 index type. (For example, on a 32-bit machine, an array with
6613 size 2^32 - 1 is too big.) */
6614 else if (TREE_CODE (itype) == INTEGER_CST
6615 && TREE_OVERFLOW (itype))
6617 error ("overflow in array dimension");
6618 TREE_OVERFLOW (itype) = 0;
6622 /* Create and return the appropriate index type. */
6623 return build_index_type (itype);
6626 /* Returns the scope (if any) in which the entity declared by
6627 DECLARATOR will be located. If the entity was declared with an
6628 unqualified name, NULL_TREE is returned. */
6631 get_scope_of_declarator (const cp_declarator *declarator)
6633 while (declarator && declarator->kind != cdk_id)
6634 declarator = declarator->declarator;
6636 /* If the declarator-id is a SCOPE_REF, the scope in which the
6637 declaration occurs is the first operand. */
6639 && declarator->u.id.qualifying_scope)
6640 return declarator->u.id.qualifying_scope;
6642 /* Otherwise, the declarator is not a qualified name; the entity will
6643 be declared in the current scope. */
6647 /* Returns an ARRAY_TYPE for an array with SIZE elements of the
6648 indicated TYPE. If non-NULL, NAME is the NAME of the declaration
6652 create_array_type_for_decl (tree name, tree type, tree size)
6654 tree itype = NULL_TREE;
6655 const char* error_msg;
6657 /* If things have already gone awry, bail now. */
6658 if (type == error_mark_node || size == error_mark_node)
6659 return error_mark_node;
6661 /* Assume that everything will go OK. */
6664 /* There are some types which cannot be array elements. */
6665 switch (TREE_CODE (type))
6668 error_msg = "array of void";
6672 error_msg = "array of functions";
6675 case REFERENCE_TYPE:
6676 error_msg = "array of references";
6680 error_msg = "array of function members";
6687 /* If something went wrong, issue an error-message and return. */
6691 error ("declaration of %qD as %s", name, error_msg);
6693 error ("creating %s", error_msg);
6695 return error_mark_node;
6700 The constant expressions that specify the bounds of the arrays
6701 can be omitted only for the first member of the sequence. */
6702 if (TREE_CODE (type) == ARRAY_TYPE && !TYPE_DOMAIN (type))
6705 error ("declaration of %qD as multidimensional array must "
6706 "have bounds for all dimensions except the first",
6709 error ("multidimensional array must have bounds for all "
6710 "dimensions except the first");
6712 return error_mark_node;
6715 /* Figure out the index type for the array. */
6717 itype = compute_array_index_type (name, size);
6720 T is called the array element type; this type shall not be [...] an
6721 abstract class type. */
6722 abstract_virtuals_error (name, type);
6724 return build_cplus_array_type (type, itype);
6727 /* Check that it's OK to declare a function with the indicated TYPE.
6728 SFK indicates the kind of special function (if any) that this
6729 function is. OPTYPE is the type given in a conversion operator
6730 declaration, or the class type for a constructor/destructor.
6731 Returns the actual return type of the function; that
6732 may be different than TYPE if an error occurs, or for certain
6733 special functions. */
6736 check_special_function_return_type (special_function_kind sfk,
6742 case sfk_constructor:
6744 error ("return type specification for constructor invalid");
6746 if (targetm.cxx.cdtor_returns_this () && !TYPE_FOR_JAVA (optype))
6747 type = build_pointer_type (optype);
6749 type = void_type_node;
6752 case sfk_destructor:
6754 error ("return type specification for destructor invalid");
6755 /* We can't use the proper return type here because we run into
6756 problems with ambiguous bases and covariant returns.
6757 Java classes are left unchanged because (void *) isn't a valid
6758 Java type, and we don't want to change the Java ABI. */
6759 if (targetm.cxx.cdtor_returns_this () && !TYPE_FOR_JAVA (optype))
6760 type = build_pointer_type (void_type_node);
6762 type = void_type_node;
6765 case sfk_conversion:
6766 if (type && !same_type_p (type, optype))
6767 error ("operator %qT declared to return %qT", optype, type);
6769 pedwarn ("return type specified for %<operator %T%>", optype);
6780 /* A variable or data member (whose unqualified name is IDENTIFIER)
6781 has been declared with the indicated TYPE. If the TYPE is not
6782 acceptable, issue an error message and return a type to use for
6783 error-recovery purposes. */
6786 check_var_type (tree identifier, tree type)
6788 if (VOID_TYPE_P (type))
6791 error ("unnamed variable or field declared void");
6792 else if (TREE_CODE (identifier) == IDENTIFIER_NODE)
6794 gcc_assert (!IDENTIFIER_OPNAME_P (identifier));
6795 error ("variable or field %qE declared void", identifier);
6798 error ("variable or field declared void");
6799 type = integer_type_node;
6805 /* Given declspecs and a declarator (abstract or otherwise), determine
6806 the name and type of the object declared and construct a DECL node
6809 DECLSPECS is a chain of tree_list nodes whose value fields
6810 are the storage classes and type specifiers.
6812 DECL_CONTEXT says which syntactic context this declaration is in:
6813 NORMAL for most contexts. Make a VAR_DECL or FUNCTION_DECL or TYPE_DECL.
6814 FUNCDEF for a function definition. Like NORMAL but a few different
6815 error messages in each case. Return value may be zero meaning
6816 this definition is too screwy to try to parse.
6817 MEMFUNCDEF for a function definition. Like FUNCDEF but prepares to
6818 handle member functions (which have FIELD context).
6819 Return value may be zero meaning this definition is too screwy to
6821 PARM for a parameter declaration (either within a function prototype
6822 or before a function body). Make a PARM_DECL, or return void_type_node.
6823 CATCHPARM for a parameter declaration before a catch clause.
6824 TYPENAME if for a typename (in a cast or sizeof).
6825 Don't make a DECL node; just return the ..._TYPE node.
6826 FIELD for a struct or union field; make a FIELD_DECL.
6827 BITFIELD for a field with specified width.
6828 INITIALIZED is 1 if the decl has an initializer.
6830 ATTRLIST is a pointer to the list of attributes, which may be NULL
6831 if there are none; *ATTRLIST may be modified if attributes from inside
6832 the declarator should be applied to the declaration.
6834 When this function is called, scoping variables (such as
6835 CURRENT_CLASS_TYPE) should reflect the scope in which the
6836 declaration occurs, not the scope in which the new declaration will
6837 be placed. For example, on:
6841 when grokdeclarator is called for `S::f', the CURRENT_CLASS_TYPE
6844 Returns a DECL (if a declarator is present), a TYPE (if there is no
6845 declarator, in cases like "struct S;"), or the ERROR_MARK_NODE if an
6849 grokdeclarator (const cp_declarator *declarator,
6850 const cp_decl_specifier_seq *declspecs,
6851 enum decl_context decl_context,
6855 tree type = NULL_TREE;
6857 int virtualp, explicitp, friendp, inlinep, staticp;
6858 int explicit_int = 0;
6859 int explicit_char = 0;
6860 int defaulted_int = 0;
6861 tree dependent_name = NULL_TREE;
6863 tree typedef_decl = NULL_TREE;
6864 const char *name = NULL;
6865 tree typedef_type = NULL_TREE;
6866 /* True if this declarator is a function definition. */
6867 bool funcdef_flag = false;
6868 cp_declarator_kind innermost_code = cdk_error;
6871 /* See the code below that used this. */
6872 tree decl_attr = NULL_TREE;
6875 /* Keep track of what sort of function is being processed
6876 so that we can warn about default return values, or explicit
6877 return values which do not match prescribed defaults. */
6878 special_function_kind sfk = sfk_none;
6880 tree dname = NULL_TREE;
6881 tree ctor_return_type = NULL_TREE;
6882 enum overload_flags flags = NO_SPECIAL;
6883 /* cv-qualifiers that apply to the declarator, for a declaration of
6884 a member function. */
6885 cp_cv_quals memfn_quals = TYPE_UNQUALIFIED;
6886 /* cv-qualifiers that apply to the type specified by the DECLSPECS. */
6888 tree raises = NULL_TREE;
6889 int template_count = 0;
6890 tree returned_attrs = NULL_TREE;
6891 tree parms = NULL_TREE;
6892 const cp_declarator *id_declarator;
6893 /* The unqualified name of the declarator; either an
6894 IDENTIFIER_NODE, BIT_NOT_EXPR, or TEMPLATE_ID_EXPR. */
6895 tree unqualified_id;
6896 /* The class type, if any, in which this entity is located,
6897 or NULL_TREE if none. Note that this value may be different from
6898 the current class type; for example if an attempt is made to declare
6899 "A::f" inside "B", this value will be "A". */
6900 tree ctype = current_class_type;
6901 /* The NAMESPACE_DECL for the namespace in which this entity is
6902 located. If an unqualified name is used to declare the entity,
6903 this value will be NULL_TREE, even if the entity is located at
6905 tree in_namespace = NULL_TREE;
6906 cp_storage_class storage_class;
6907 bool unsigned_p, signed_p, short_p, long_p, thread_p;
6908 bool type_was_error_mark_node = false;
6910 signed_p = declspecs->specs[(int)ds_signed];
6911 unsigned_p = declspecs->specs[(int)ds_unsigned];
6912 short_p = declspecs->specs[(int)ds_short];
6913 long_p = declspecs->specs[(int)ds_long];
6914 longlong = declspecs->specs[(int)ds_long] >= 2;
6915 thread_p = declspecs->specs[(int)ds_thread];
6917 if (decl_context == FUNCDEF)
6918 funcdef_flag = true, decl_context = NORMAL;
6919 else if (decl_context == MEMFUNCDEF)
6920 funcdef_flag = true, decl_context = FIELD;
6921 else if (decl_context == BITFIELD)
6922 bitfield = 1, decl_context = FIELD;
6924 /* Look inside a declarator for the name being declared
6925 and get it as a string, for an error message. */
6926 for (id_declarator = declarator;
6928 id_declarator = id_declarator->declarator)
6930 if (id_declarator->kind != cdk_id)
6931 innermost_code = id_declarator->kind;
6933 switch (id_declarator->kind)
6936 if (id_declarator->declarator
6937 && id_declarator->declarator->kind == cdk_id)
6939 sfk = id_declarator->declarator->u.id.sfk;
6940 if (sfk == sfk_destructor)
6947 tree qualifying_scope = id_declarator->u.id.qualifying_scope;
6948 tree decl = id_declarator->u.id.unqualified_name;
6951 if (qualifying_scope)
6953 if (at_function_scope_p ())
6957 A declarator-id shall not be qualified except
6960 None of the cases are permitted in block
6962 if (qualifying_scope == global_namespace)
6963 error ("invalid use of qualified-name %<::%D%>",
6965 else if (TYPE_P (qualifying_scope))
6966 error ("invalid use of qualified-name %<%T::%D%>",
6967 qualifying_scope, decl);
6969 error ("invalid use of qualified-name %<%D::%D%>",
6970 qualifying_scope, decl);
6971 return error_mark_node;
6973 else if (TYPE_P (qualifying_scope))
6975 ctype = qualifying_scope;
6976 if (innermost_code != cdk_function
6977 && current_class_type
6978 && !UNIQUELY_DERIVED_FROM_P (ctype,
6979 current_class_type))
6981 error ("type %qT is not derived from type %qT",
6982 ctype, current_class_type);
6983 return error_mark_node;
6986 else if (TREE_CODE (qualifying_scope) == NAMESPACE_DECL)
6987 in_namespace = qualifying_scope;
6989 switch (TREE_CODE (decl))
6995 if (innermost_code != cdk_function)
6997 error ("declaration of %qD as non-function", decl);
6998 return error_mark_node;
7000 else if (!qualifying_scope
7001 && !(current_class_type && at_class_scope_p ()))
7003 error ("declaration of %qD as non-member", decl);
7004 return error_mark_node;
7007 type = TREE_OPERAND (decl, 0);
7008 name = IDENTIFIER_POINTER (constructor_name (type));
7013 case TEMPLATE_ID_EXPR:
7015 tree fns = TREE_OPERAND (decl, 0);
7018 if (TREE_CODE (dname) != IDENTIFIER_NODE)
7020 gcc_assert (is_overloaded_fn (dname));
7021 dname = DECL_NAME (get_first_fn (dname));
7026 case IDENTIFIER_NODE:
7027 if (TREE_CODE (decl) == IDENTIFIER_NODE)
7030 if (C_IS_RESERVED_WORD (dname))
7032 error ("declarator-id missing; using reserved word %qD",
7034 name = IDENTIFIER_POINTER (dname);
7036 else if (!IDENTIFIER_TYPENAME_P (dname))
7037 name = IDENTIFIER_POINTER (dname);
7040 gcc_assert (flags == NO_SPECIAL);
7041 flags = TYPENAME_FLAG;
7042 ctor_return_type = TREE_TYPE (dname);
7043 sfk = sfk_conversion;
7044 if (is_typename_at_global_scope (dname))
7045 name = IDENTIFIER_POINTER (dname);
7047 name = "<invalid operator>";
7063 return error_mark_node;
7069 if (id_declarator->kind == cdk_id)
7075 The declarator in a function-definition shall have the form
7076 D1 ( parameter-declaration-clause) ... */
7077 if (funcdef_flag && innermost_code != cdk_function)
7079 error ("function definition does not declare parameters");
7080 return error_mark_node;
7083 if (((dname && IDENTIFIER_OPNAME_P (dname)) || flags == TYPENAME_FLAG)
7084 && innermost_code != cdk_function
7085 && ! (ctype && !declspecs->any_specifiers_p))
7087 error ("declaration of %qD as non-function", dname);
7088 return error_mark_node;
7091 /* Anything declared one level down from the top level
7092 must be one of the parameters of a function
7093 (because the body is at least two levels down). */
7095 /* This heuristic cannot be applied to C++ nodes! Fixed, however,
7096 by not allowing C++ class definitions to specify their parameters
7097 with xdecls (must be spec.d in the parmlist).
7099 Since we now wait to push a class scope until we are sure that
7100 we are in a legitimate method context, we must set oldcname
7101 explicitly (since current_class_name is not yet alive).
7103 We also want to avoid calling this a PARM if it is in a namespace. */
7105 if (decl_context == NORMAL && !toplevel_bindings_p ())
7107 struct cp_binding_level *b = current_binding_level;
7108 current_binding_level = b->level_chain;
7109 if (current_binding_level != 0 && toplevel_bindings_p ())
7110 decl_context = PARM;
7111 current_binding_level = b;
7115 name = decl_context == PARM ? "parameter" : "type name";
7117 /* If there were multiple types specified in the decl-specifier-seq,
7118 issue an error message. */
7119 if (declspecs->multiple_types_p)
7121 error ("two or more data types in declaration of %qs", name);
7122 return error_mark_node;
7125 /* Extract the basic type from the decl-specifier-seq. */
7126 type = declspecs->type;
7127 if (type == error_mark_node)
7130 type_was_error_mark_node = true;
7132 /* If the entire declaration is itself tagged as deprecated then
7133 suppress reports of deprecated items. */
7134 if (type && TREE_DEPRECATED (type)
7135 && deprecated_state != DEPRECATED_SUPPRESS)
7136 warn_deprecated_use (type);
7137 if (type && TREE_CODE (type) == TYPE_DECL)
7139 typedef_decl = type;
7140 type = TREE_TYPE (typedef_decl);
7142 /* No type at all: default to `int', and set DEFAULTED_INT
7143 because it was not a user-defined typedef. */
7144 if (type == NULL_TREE && (signed_p || unsigned_p || long_p || short_p))
7146 /* These imply 'int'. */
7147 type = integer_type_node;
7151 explicit_int = declspecs->explicit_int_p;
7152 explicit_char = declspecs->explicit_char_p;
7155 /* See the code below that used this. */
7157 decl_attr = DECL_ATTRIBUTES (typedef_decl);
7159 typedef_type = type;
7162 if (sfk != sfk_conversion)
7163 ctor_return_type = ctype;
7165 if (sfk != sfk_none)
7166 type = check_special_function_return_type (sfk, type,
7168 else if (type == NULL_TREE)
7174 /* We handle `main' specially here, because 'main () { }' is so
7175 common. With no options, it is allowed. With -Wreturn-type,
7176 it is a warning. It is only an error with -pedantic-errors. */
7177 is_main = (funcdef_flag
7178 && dname && MAIN_NAME_P (dname)
7179 && ctype == NULL_TREE
7180 && in_namespace == NULL_TREE
7181 && current_namespace == global_namespace);
7183 if (type_was_error_mark_node)
7184 /* We've already issued an error, don't complain more. */;
7185 else if (in_system_header || flag_ms_extensions)
7186 /* Allow it, sigh. */;
7187 else if (pedantic || ! is_main)
7188 pedwarn ("ISO C++ forbids declaration of %qs with no type", name);
7189 else if (warn_return_type)
7190 warning (0, "ISO C++ forbids declaration of %qs with no type", name);
7192 type = integer_type_node;
7197 /* Now process the modifiers that were specified
7198 and check for invalid combinations. */
7200 /* Long double is a special combination. */
7201 if (long_p && !longlong && TYPE_MAIN_VARIANT (type) == double_type_node)
7204 type = build_qualified_type (long_double_type_node,
7205 cp_type_quals (type));
7208 /* Check all other uses of type modifiers. */
7210 if (unsigned_p || signed_p || long_p || short_p)
7214 if ((signed_p || unsigned_p) && TREE_CODE (type) != INTEGER_TYPE)
7215 error ("%<signed%> or %<unsigned%> invalid for %qs", name);
7216 else if (signed_p && unsigned_p)
7217 error ("%<signed%> and %<unsigned%> specified together for %qs", name);
7218 else if (longlong && TREE_CODE (type) != INTEGER_TYPE)
7219 error ("%<long long%> invalid for %qs", name);
7220 else if (long_p && TREE_CODE (type) == REAL_TYPE)
7221 error ("%<long%> invalid for %qs", name);
7222 else if (short_p && TREE_CODE (type) == REAL_TYPE)
7223 error ("%<short%> invalid for %qs", name);
7224 else if ((long_p || short_p) && TREE_CODE (type) != INTEGER_TYPE)
7225 error ("%<long%> or %<short%> invalid for %qs", name);
7226 else if ((long_p || short_p) && explicit_char)
7227 error ("%<long%> or %<short%> specified with char for %qs", name);
7228 else if (long_p && short_p)
7229 error ("%<long%> and %<short%> specified together for %qs", name);
7233 if (!explicit_int && !defaulted_int && !explicit_char && pedantic)
7235 pedwarn ("long, short, signed or unsigned used invalidly for %qs",
7237 if (flag_pedantic_errors)
7242 /* Discard the type modifiers if they are invalid. */
7253 /* Decide whether an integer type is signed or not.
7254 Optionally treat bitfields as signed by default. */
7258 It is implementation-defined whether a plain (neither
7259 explicitly signed or unsigned) char, short, int, or long
7260 bit-field is signed or unsigned.
7262 Naturally, we extend this to long long as well. Note that
7263 this does not include wchar_t. */
7264 || (bitfield && !flag_signed_bitfields
7266 /* A typedef for plain `int' without `signed' can be
7267 controlled just like plain `int', but a typedef for
7268 `signed int' cannot be so controlled. */
7270 && C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl))
7271 && TREE_CODE (type) == INTEGER_TYPE
7272 && !same_type_p (TYPE_MAIN_VARIANT (type), wchar_type_node)))
7275 type = long_long_unsigned_type_node;
7277 type = long_unsigned_type_node;
7279 type = short_unsigned_type_node;
7280 else if (type == char_type_node)
7281 type = unsigned_char_type_node;
7282 else if (typedef_decl)
7283 type = c_common_unsigned_type (type);
7285 type = unsigned_type_node;
7287 else if (signed_p && type == char_type_node)
7288 type = signed_char_type_node;
7290 type = long_long_integer_type_node;
7292 type = long_integer_type_node;
7294 type = short_integer_type_node;
7296 if (declspecs->specs[(int)ds_complex])
7298 if (TREE_CODE (type) != INTEGER_TYPE && TREE_CODE (type) != REAL_TYPE)
7299 error ("complex invalid for %qs", name);
7300 /* If we just have "complex", it is equivalent to
7301 "complex double", but if any modifiers at all are specified it is
7302 the complex form of TYPE. E.g, "complex short" is
7303 "complex short int". */
7305 else if (defaulted_int && ! longlong
7306 && ! (long_p || short_p || signed_p || unsigned_p))
7307 type = complex_double_type_node;
7308 else if (type == integer_type_node)
7309 type = complex_integer_type_node;
7310 else if (type == float_type_node)
7311 type = complex_float_type_node;
7312 else if (type == double_type_node)
7313 type = complex_double_type_node;
7314 else if (type == long_double_type_node)
7315 type = complex_long_double_type_node;
7317 type = build_complex_type (type);
7320 type_quals = TYPE_UNQUALIFIED;
7321 if (declspecs->specs[(int)ds_const])
7322 type_quals |= TYPE_QUAL_CONST;
7323 if (declspecs->specs[(int)ds_volatile])
7324 type_quals |= TYPE_QUAL_VOLATILE;
7325 if (declspecs->specs[(int)ds_restrict])
7326 type_quals |= TYPE_QUAL_RESTRICT;
7327 if (sfk == sfk_conversion && type_quals != TYPE_UNQUALIFIED)
7328 error ("qualifiers are not allowed on declaration of %<operator %T%>",
7331 if (TREE_CODE (type) == FUNCTION_TYPE
7332 && type_quals != TYPE_UNQUALIFIED)
7334 /* This was an error in C++98 (cv-qualifiers cannot be added to
7335 a function type), but DR 295 makes the code well-formed by
7336 dropping the extra qualifiers. */
7339 tree bad_type = build_qualified_type (type, type_quals);
7340 pedwarn ("ignoring %qV qualifiers added to function type %qT",
7343 type_quals = TYPE_UNQUALIFIED;
7345 type_quals |= cp_type_quals (type);
7346 type = cp_build_qualified_type_real
7347 (type, type_quals, ((typedef_decl && !DECL_ARTIFICIAL (typedef_decl)
7348 ? tf_ignore_bad_quals : 0) | tf_warning_or_error));
7349 /* We might have ignored or rejected some of the qualifiers. */
7350 type_quals = cp_type_quals (type);
7353 inlinep = !! declspecs->specs[(int)ds_inline];
7354 virtualp = !! declspecs->specs[(int)ds_virtual];
7355 explicitp = !! declspecs->specs[(int)ds_explicit];
7357 storage_class = declspecs->storage_class;
7358 if (storage_class == sc_static)
7359 staticp = 1 + (decl_context == FIELD);
7361 if (virtualp && staticp == 2)
7363 error ("member %qD cannot be declared both virtual and static", dname);
7364 storage_class = sc_none;
7367 friendp = !! declspecs->specs[(int)ds_friend];
7369 if (dependent_name && !friendp)
7371 error ("%<%T::%D%> is not a valid declarator", ctype, dependent_name);
7372 return error_mark_node;
7375 /* Issue errors about use of storage classes for parameters. */
7376 if (decl_context == PARM)
7378 if (declspecs->specs[(int)ds_typedef])
7380 error ("typedef declaration invalid in parameter declaration");
7381 return error_mark_node;
7383 else if (storage_class == sc_static
7384 || storage_class == sc_extern
7386 error ("storage class specifiers invalid in parameter declarations");
7389 /* Give error if `virtual' is used outside of class declaration. */
7391 && (current_class_name == NULL_TREE || decl_context != FIELD))
7393 error ("virtual outside class declaration");
7397 /* Static anonymous unions are dealt with here. */
7398 if (staticp && decl_context == TYPENAME
7400 && ANON_AGGR_TYPE_P (declspecs->type))
7401 decl_context = FIELD;
7403 /* Warn about storage classes that are invalid for certain
7404 kinds of declarations (parameters, typenames, etc.). */
7405 if (declspecs->multiple_storage_classes_p)
7407 error ("multiple storage classes in declaration of %qs", name);
7408 storage_class = sc_none;
7412 && storage_class != sc_extern
7413 && storage_class != sc_static)
7414 || declspecs->specs[(int)ds_typedef]))
7416 error ("multiple storage classes in declaration of %qs", name);
7419 else if (decl_context != NORMAL
7420 && ((storage_class != sc_none
7421 && storage_class != sc_mutable)
7424 if ((decl_context == PARM || decl_context == CATCHPARM)
7425 && (storage_class == sc_register
7426 || storage_class == sc_auto))
7428 else if (declspecs->specs[(int)ds_typedef])
7430 else if (decl_context == FIELD
7431 /* C++ allows static class elements. */
7432 && storage_class == sc_static)
7433 /* C++ also allows inlines and signed and unsigned elements,
7434 but in those cases we don't come in here. */
7438 if (decl_context == FIELD)
7439 error ("storage class specified for %qs", name);
7442 if (decl_context == PARM || decl_context == CATCHPARM)
7443 error ("storage class specified for parameter %qs", name);
7445 error ("storage class specified for typename");
7447 if (storage_class == sc_register
7448 || storage_class == sc_auto
7449 || storage_class == sc_extern
7451 storage_class = sc_none;
7454 else if (storage_class == sc_extern && initialized
7457 if (toplevel_bindings_p ())
7459 /* It's common practice (and completely valid) to have a const
7460 be initialized and declared extern. */
7461 if (!(type_quals & TYPE_QUAL_CONST))
7462 warning (0, "%qs initialized and declared %<extern%>", name);
7465 error ("%qs has both %<extern%> and initializer", name);
7467 else if (storage_class == sc_extern && funcdef_flag
7468 && ! toplevel_bindings_p ())
7469 error ("nested function %qs declared %<extern%>", name);
7470 else if (toplevel_bindings_p ())
7472 if (storage_class == sc_auto)
7473 error ("top-level declaration of %qs specifies %<auto%>", name);
7476 && storage_class != sc_extern
7477 && storage_class != sc_static)
7479 error ("function-scope %qs implicitly auto and declared %<__thread%>",
7484 if (storage_class && friendp)
7485 error ("storage class specifiers invalid in friend function declarations");
7488 unqualified_id = NULL_TREE;
7491 unqualified_id = id_declarator->u.id.unqualified_name;
7492 switch (TREE_CODE (unqualified_id))
7496 = constructor_name (TREE_OPERAND (unqualified_id, 0));
7499 case IDENTIFIER_NODE:
7500 case TEMPLATE_ID_EXPR:
7508 /* Determine the type of the entity declared by recurring on the
7510 for (; declarator; declarator = declarator->declarator)
7512 const cp_declarator *inner_declarator;
7515 if (type == error_mark_node)
7516 return error_mark_node;
7518 attrs = declarator->attributes;
7524 if (declarator == NULL || declarator->kind == cdk_id)
7525 attr_flags |= (int) ATTR_FLAG_DECL_NEXT;
7526 if (declarator->kind == cdk_function)
7527 attr_flags |= (int) ATTR_FLAG_FUNCTION_NEXT;
7528 if (declarator->kind == cdk_array)
7529 attr_flags |= (int) ATTR_FLAG_ARRAY_NEXT;
7530 returned_attrs = decl_attributes (&type,
7531 chainon (returned_attrs, attrs),
7535 if (declarator->kind == cdk_id)
7538 inner_declarator = declarator->declarator;
7540 switch (declarator->kind)
7543 type = create_array_type_for_decl (dname, type,
7544 declarator->u.array.bounds);
7552 /* Declaring a function type.
7553 Make sure we have a valid type for the function to return. */
7555 /* We now know that the TYPE_QUALS don't apply to the
7556 decl, but to its return type. */
7557 type_quals = TYPE_UNQUALIFIED;
7559 /* Warn about some types functions can't return. */
7561 if (TREE_CODE (type) == FUNCTION_TYPE)
7563 error ("%qs declared as function returning a function", name);
7564 type = integer_type_node;
7566 if (TREE_CODE (type) == ARRAY_TYPE)
7568 error ("%qs declared as function returning an array", name);
7569 type = integer_type_node;
7572 /* Pick up type qualifiers which should be applied to `this'. */
7573 memfn_quals = declarator->u.function.qualifiers;
7575 /* Pick up the exception specifications. */
7576 raises = declarator->u.function.exception_specification;
7578 /* Say it's a definition only for the CALL_EXPR
7579 closest to the identifier. */
7580 funcdecl_p = inner_declarator && inner_declarator->kind == cdk_id;
7582 if (ctype == NULL_TREE
7583 && decl_context == FIELD
7585 && (friendp == 0 || dname == current_class_name))
7586 ctype = current_class_type;
7588 if (ctype && (sfk == sfk_constructor
7589 || sfk == sfk_destructor))
7591 /* We are within a class's scope. If our declarator name
7592 is the same as the class name, and we are defining
7593 a function, then it is a constructor/destructor, and
7594 therefore returns a void type. */
7596 /* ISO C++ 12.4/2. A destructor may not be declared
7597 const or volatile. A destructor may not be
7600 ISO C++ 12.1. A constructor may not be declared
7601 const or volatile. A constructor may not be
7602 virtual. A constructor may not be static. */
7604 error ((flags == DTOR_FLAG)
7605 ? "destructor cannot be static member function"
7606 : "constructor cannot be static member function");
7609 error ((flags == DTOR_FLAG)
7610 ? "destructors may not be cv-qualified"
7611 : "constructors may not be cv-qualified");
7612 memfn_quals = TYPE_UNQUALIFIED;
7615 if (decl_context == FIELD
7616 && !member_function_or_else (ctype,
7619 return error_mark_node;
7621 if (flags != DTOR_FLAG)
7623 /* It's a constructor. */
7628 pedwarn ("constructors cannot be declared virtual");
7631 if (decl_context == FIELD
7632 && sfk != sfk_constructor)
7633 return error_mark_node;
7635 if (decl_context == FIELD)
7641 error ("can't initialize friend function %qs", name);
7644 /* Cannot be both friend and virtual. */
7645 error ("virtual functions cannot be friends");
7648 if (decl_context == NORMAL)
7649 error ("friend declaration not in class definition");
7650 if (current_function_decl && funcdef_flag)
7651 error ("can't define friend function %qs in a local "
7656 arg_types = grokparms (declarator->u.function.parameters,
7659 if (inner_declarator
7660 && inner_declarator->kind == cdk_id
7661 && inner_declarator->u.id.sfk == sfk_destructor
7662 && arg_types != void_list_node)
7664 error ("destructors may not have parameters");
7665 arg_types = void_list_node;
7669 type = build_function_type (type, arg_types);
7676 /* Filter out pointers-to-references and references-to-references.
7677 We can get these if a TYPE_DECL is used. */
7679 if (TREE_CODE (type) == REFERENCE_TYPE)
7681 error (declarator->kind == cdk_reference
7682 ? "cannot declare reference to %q#T"
7683 : "cannot declare pointer to %q#T", type);
7684 type = TREE_TYPE (type);
7686 else if (VOID_TYPE_P (type))
7688 if (declarator->kind == cdk_reference)
7689 error ("cannot declare reference to %q#T", type);
7690 else if (declarator->kind == cdk_ptrmem)
7691 error ("cannot declare pointer to %q#T member", type);
7694 /* We now know that the TYPE_QUALS don't apply to the decl,
7695 but to the target of the pointer. */
7696 type_quals = TYPE_UNQUALIFIED;
7698 if (declarator->kind == cdk_ptrmem
7699 && (TREE_CODE (type) == FUNCTION_TYPE || memfn_quals))
7701 memfn_quals |= cp_type_quals (type);
7702 type = build_memfn_type (type,
7703 declarator->u.pointer.class_type,
7705 memfn_quals = TYPE_UNQUALIFIED;
7708 if (declarator->kind == cdk_reference)
7710 if (!VOID_TYPE_P (type))
7711 type = build_reference_type (type);
7713 else if (TREE_CODE (type) == METHOD_TYPE)
7714 type = build_ptrmemfunc_type (build_pointer_type (type));
7715 else if (declarator->kind == cdk_ptrmem)
7717 gcc_assert (TREE_CODE (declarator->u.pointer.class_type)
7719 if (declarator->u.pointer.class_type == error_mark_node)
7720 /* We will already have complained. */
7721 type = error_mark_node;
7723 type = build_ptrmem_type (declarator->u.pointer.class_type,
7727 type = build_pointer_type (type);
7729 /* Process a list of type modifier keywords (such as
7730 const or volatile) that were given inside the `*' or `&'. */
7732 if (declarator->u.pointer.qualifiers)
7735 = cp_build_qualified_type (type,
7736 declarator->u.pointer.qualifiers);
7737 type_quals = cp_type_quals (type);
7750 if (unqualified_id && TREE_CODE (unqualified_id) == TEMPLATE_ID_EXPR
7751 && TREE_CODE (type) != FUNCTION_TYPE
7752 && TREE_CODE (type) != METHOD_TYPE)
7754 error ("template-id %qD used as a declarator",
7756 unqualified_id = dname;
7759 /* If TYPE is a FUNCTION_TYPE, but the function name was explicitly
7760 qualified with a class-name, turn it into a METHOD_TYPE, unless
7761 we know that the function is static. We take advantage of this
7762 opportunity to do other processing that pertains to entities
7763 explicitly declared to be class members. Note that if DECLARATOR
7764 is non-NULL, we know it is a cdk_id declarator; otherwise, we
7765 would not have exited the loop above. */
7767 && declarator->u.id.qualifying_scope
7768 && TYPE_P (declarator->u.id.qualifying_scope))
7772 ctype = declarator->u.id.qualifying_scope;
7773 ctype = TYPE_MAIN_VARIANT (ctype);
7775 while (t != NULL_TREE && CLASS_TYPE_P (t))
7777 /* You're supposed to have one `template <...>' for every
7778 template class, but you don't need one for a full
7779 specialization. For example:
7781 template <class T> struct S{};
7782 template <> struct S<int> { void f(); };
7783 void S<int>::f () {}
7785 is correct; there shouldn't be a `template <>' for the
7786 definition of `S<int>::f'. */
7787 if (CLASSTYPE_TEMPLATE_SPECIALIZATION (t)
7788 && !any_dependent_template_arguments_p (CLASSTYPE_TI_ARGS (t)))
7789 /* T is an explicit (not partial) specialization. All
7790 containing classes must therefore also be explicitly
7793 if ((CLASSTYPE_USE_TEMPLATE (t) || CLASSTYPE_IS_TEMPLATE (t))
7794 && PRIMARY_TEMPLATE_P (CLASSTYPE_TI_TEMPLATE (t)))
7795 template_count += 1;
7797 t = TYPE_MAIN_DECL (t);
7798 t = DECL_CONTEXT (t);
7801 if (ctype == current_class_type)
7804 pedwarn ("member functions are implicitly friends of their class");
7806 pedwarn ("extra qualification %<%T::%> on member %qs",
7809 else if (/* If the qualifying type is already complete, then we
7810 can skip the following checks. */
7811 !COMPLETE_TYPE_P (ctype)
7812 && (/* If the function is being defined, then
7813 qualifying type must certainly be complete. */
7815 /* A friend declaration of "T::f" is OK, even if
7816 "T" is a template parameter. But, if this
7817 function is not a friend, the qualifying type
7819 || (!friendp && !CLASS_TYPE_P (ctype))
7820 /* For a declaration, the type need not be
7821 complete, if either it is dependent (since there
7822 is no meaningful definition of complete in that
7823 case) or the qualifying class is currently being
7825 || !(dependent_type_p (ctype)
7826 || currently_open_class (ctype)))
7827 /* Check that the qualifying type is complete. */
7828 && !complete_type_or_else (ctype, NULL_TREE))
7829 return error_mark_node;
7830 else if (TREE_CODE (type) == FUNCTION_TYPE)
7832 tree sname = declarator->u.id.unqualified_name;
7834 if (current_class_type
7835 && (!friendp || funcdef_flag))
7838 ? "cannot define member function %<%T::%s%> within %<%T%>"
7839 : "cannot declare member function %<%T::%s%> within %<%T%>",
7840 ctype, name, current_class_type);
7841 return error_mark_node;
7844 if (TREE_CODE (sname) == IDENTIFIER_NODE
7845 && NEW_DELETE_OPNAME_P (sname))
7846 /* Overloaded operator new and operator delete
7847 are always static functions. */
7850 type = build_memfn_type (type, ctype, memfn_quals);
7852 else if (declspecs->specs[(int)ds_typedef]
7853 && current_class_type)
7855 error ("cannot declare member %<%T::%s%> within %qT",
7856 ctype, name, current_class_type);
7857 return error_mark_node;
7861 /* Now TYPE has the actual type. */
7866 *attrlist = chainon (returned_attrs, *attrlist);
7868 attrlist = &returned_attrs;
7871 /* Did array size calculations overflow? */
7873 if (TREE_CODE (type) == ARRAY_TYPE
7874 && COMPLETE_TYPE_P (type)
7875 && TREE_CODE (TYPE_SIZE_UNIT (type)) == INTEGER_CST
7876 && TREE_OVERFLOW (TYPE_SIZE_UNIT (type)))
7878 error ("size of array %qs is too large", name);
7879 /* If we proceed with the array type as it is, we'll eventually
7880 crash in tree_low_cst(). */
7881 type = error_mark_node;
7884 if ((decl_context == FIELD || decl_context == PARM)
7885 && !processing_template_decl
7886 && variably_modified_type_p (type, NULL_TREE))
7888 if (decl_context == FIELD)
7889 error ("data member may not have variably modified type %qT", type);
7891 error ("parameter may not have variably modified type %qT", type);
7892 type = error_mark_node;
7895 if (explicitp == 1 || (explicitp && friendp))
7897 /* [dcl.fct.spec] The explicit specifier shall only be used in
7898 declarations of constructors within a class definition. */
7899 error ("only declarations of constructors can be %<explicit%>");
7903 if (storage_class == sc_mutable)
7905 if (decl_context != FIELD || friendp)
7907 error ("non-member %qs cannot be declared %<mutable%>", name);
7908 storage_class = sc_none;
7910 else if (decl_context == TYPENAME || declspecs->specs[(int)ds_typedef])
7912 error ("non-object member %qs cannot be declared %<mutable%>", name);
7913 storage_class = sc_none;
7915 else if (TREE_CODE (type) == FUNCTION_TYPE
7916 || TREE_CODE (type) == METHOD_TYPE)
7918 error ("function %qs cannot be declared %<mutable%>", name);
7919 storage_class = sc_none;
7923 error ("static %qs cannot be declared %<mutable%>", name);
7924 storage_class = sc_none;
7926 else if (type_quals & TYPE_QUAL_CONST)
7928 error ("const %qs cannot be declared %<mutable%>", name);
7929 storage_class = sc_none;
7933 /* If this is declaring a typedef name, return a TYPE_DECL. */
7934 if (declspecs->specs[(int)ds_typedef] && decl_context != TYPENAME)
7938 /* Note that the grammar rejects storage classes
7939 in typenames, fields or parameters. */
7940 if (current_lang_name == lang_name_java)
7941 TYPE_FOR_JAVA (type) = 1;
7943 /* This declaration:
7945 typedef void f(int) const;
7947 declares a function type which is not a member of any
7948 particular class, but which is cv-qualified; for
7949 example "f S::*" declares a pointer to a const-qualified
7950 member function of S. We record the cv-qualification in the
7952 if (memfn_quals && TREE_CODE (type) == FUNCTION_TYPE)
7953 type = cp_build_qualified_type (type, memfn_quals);
7955 if (decl_context == FIELD)
7956 decl = build_lang_decl (TYPE_DECL, unqualified_id, type);
7958 decl = build_decl (TYPE_DECL, unqualified_id, type);
7959 if (id_declarator && declarator->u.id.qualifying_scope)
7960 error ("%Jtypedef name may not be a nested-name-specifier", decl);
7962 if (decl_context != FIELD)
7964 if (!current_function_decl)
7965 DECL_CONTEXT (decl) = FROB_CONTEXT (current_namespace);
7966 else if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (current_function_decl)
7967 || (DECL_MAYBE_IN_CHARGE_DESTRUCTOR_P
7968 (current_function_decl)))
7969 /* The TYPE_DECL is "abstract" because there will be
7970 clones of this constructor/destructor, and there will
7971 be copies of this TYPE_DECL generated in those
7973 DECL_ABSTRACT (decl) = 1;
7975 else if (constructor_name_p (unqualified_id, current_class_type))
7976 pedwarn ("ISO C++ forbids nested type %qD with same name "
7977 "as enclosing class",
7980 /* If the user declares "typedef struct {...} foo" then the
7981 struct will have an anonymous name. Fill that name in now.
7982 Nothing can refer to it, so nothing needs know about the name
7984 if (type != error_mark_node
7987 && TREE_CODE (TYPE_NAME (type)) == TYPE_DECL
7988 && TYPE_ANONYMOUS_P (type)
7989 /* Don't do this if there are attributes. */
7990 && (!attrlist || !*attrlist)
7991 && cp_type_quals (type) == TYPE_UNQUALIFIED)
7993 tree oldname = TYPE_NAME (type);
7996 /* Replace the anonymous name with the real name everywhere. */
7997 for (t = TYPE_MAIN_VARIANT (type); t; t = TYPE_NEXT_VARIANT (t))
7998 if (TYPE_NAME (t) == oldname)
7999 TYPE_NAME (t) = decl;
8001 if (TYPE_LANG_SPECIFIC (type))
8002 TYPE_WAS_ANONYMOUS (type) = 1;
8004 /* If this is a typedef within a template class, the nested
8005 type is a (non-primary) template. The name for the
8006 template needs updating as well. */
8007 if (TYPE_LANG_SPECIFIC (type) && CLASSTYPE_TEMPLATE_INFO (type))
8008 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type))
8009 = TYPE_IDENTIFIER (type);
8011 /* FIXME remangle member functions; member functions of a
8012 type with external linkage have external linkage. */
8015 /* Any qualifiers on a function type typedef have already been
8017 if (memfn_quals && !ctype && TREE_CODE (type) == FUNCTION_TYPE)
8018 memfn_quals = TYPE_UNQUALIFIED;
8021 || (typedef_decl && C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl)))
8022 C_TYPEDEF_EXPLICITLY_SIGNED (decl) = 1;
8024 bad_specifiers (decl, "type", virtualp,
8025 memfn_quals != TYPE_UNQUALIFIED,
8026 inlinep, friendp, raises != NULL_TREE);
8031 /* Detect the case of an array type of unspecified size
8032 which came, as such, direct from a typedef name.
8033 We must copy the type, so that the array's domain can be
8034 individually set by the object's initializer. */
8036 if (type && typedef_type
8037 && TREE_CODE (type) == ARRAY_TYPE && !TYPE_DOMAIN (type)
8038 && TYPE_MAIN_VARIANT (type) == TYPE_MAIN_VARIANT (typedef_type))
8039 type = build_cplus_array_type (TREE_TYPE (type), NULL_TREE);
8041 /* Detect where we're using a typedef of function type to declare a
8042 function. PARMS will not be set, so we must create it now. */
8044 if (type == typedef_type && TREE_CODE (type) == FUNCTION_TYPE)
8046 tree decls = NULL_TREE;
8049 for (args = TYPE_ARG_TYPES (type); args; args = TREE_CHAIN (args))
8051 tree decl = cp_build_parm_decl (NULL_TREE, TREE_VALUE (args));
8053 TREE_CHAIN (decl) = decls;
8057 parms = nreverse (decls);
8059 if (decl_context != TYPENAME)
8061 /* A cv-qualifier-seq shall only be part of the function type
8062 for a non-static member function. [8.3.5/4 dcl.fct] */
8063 if (cp_type_quals (type) != TYPE_UNQUALIFIED
8064 && (current_class_type == NULL_TREE || staticp) )
8066 error ("qualified function types cannot be used to declare %s functions",
8067 (staticp? "static member" : "free"));
8068 type = TYPE_MAIN_VARIANT (type);
8071 /* The qualifiers on the function type become the qualifiers on
8072 the non-static member function. */
8073 memfn_quals |= cp_type_quals (type);
8077 /* If this is a type name (such as, in a cast or sizeof),
8078 compute the type and return it now. */
8080 if (decl_context == TYPENAME)
8082 /* Note that the grammar rejects storage classes
8083 in typenames, fields or parameters. */
8084 if (type_quals != TYPE_UNQUALIFIED)
8085 type_quals = TYPE_UNQUALIFIED;
8087 /* Special case: "friend class foo" looks like a TYPENAME context. */
8090 if (type_quals != TYPE_UNQUALIFIED)
8092 error ("type qualifiers specified for friend class declaration");
8093 type_quals = TYPE_UNQUALIFIED;
8097 error ("%<inline%> specified for friend class declaration");
8103 /* Don't allow friend declaration without a class-key. */
8104 if (TREE_CODE (type) == TEMPLATE_TYPE_PARM)
8105 pedwarn ("template parameters cannot be friends");
8106 else if (TREE_CODE (type) == TYPENAME_TYPE)
8107 pedwarn ("friend declaration requires class-key, "
8108 "i.e. %<friend class %T::%D%>",
8109 TYPE_CONTEXT (type), TYPENAME_TYPE_FULLNAME (type));
8111 pedwarn ("friend declaration requires class-key, "
8112 "i.e. %<friend %#T%>",
8116 /* Only try to do this stuff if we didn't already give up. */
8117 if (type != integer_type_node)
8119 /* A friendly class? */
8120 if (current_class_type)
8121 make_friend_class (current_class_type, TYPE_MAIN_VARIANT (type),
8124 error ("trying to make class %qT a friend of global scope",
8127 type = void_type_node;
8130 else if (memfn_quals)
8132 if (ctype == NULL_TREE)
8134 if (TREE_CODE (type) != METHOD_TYPE)
8135 error ("invalid qualifiers on non-member function type");
8137 ctype = TYPE_METHOD_BASETYPE (type);
8140 type = build_memfn_type (type, ctype, memfn_quals);
8145 else if (unqualified_id == NULL_TREE && decl_context != PARM
8146 && decl_context != CATCHPARM
8147 && TREE_CODE (type) != UNION_TYPE
8150 error ("abstract declarator %qT used as declaration", type);
8151 return error_mark_node;
8154 /* Only functions may be declared using an operator-function-id. */
8156 && IDENTIFIER_OPNAME_P (unqualified_id)
8157 && TREE_CODE (type) != FUNCTION_TYPE
8158 && TREE_CODE (type) != METHOD_TYPE)
8160 error ("declaration of %qD as non-function", unqualified_id);
8161 return error_mark_node;
8164 /* We don't check parameter types here because we can emit a better
8165 error message later. */
8166 if (decl_context != PARM)
8167 type = check_var_type (unqualified_id, type);
8169 /* Now create the decl, which may be a VAR_DECL, a PARM_DECL
8170 or a FUNCTION_DECL, depending on DECL_CONTEXT and TYPE. */
8172 if (decl_context == PARM || decl_context == CATCHPARM)
8174 if (ctype || in_namespace)
8175 error ("cannot use %<::%> in parameter declaration");
8177 /* A parameter declared as an array of T is really a pointer to T.
8178 One declared as a function is really a pointer to a function.
8179 One declared as a member is really a pointer to member. */
8181 if (TREE_CODE (type) == ARRAY_TYPE)
8183 /* Transfer const-ness of array into that of type pointed to. */
8184 type = build_pointer_type (TREE_TYPE (type));
8185 type_quals = TYPE_UNQUALIFIED;
8187 else if (TREE_CODE (type) == FUNCTION_TYPE)
8188 type = build_pointer_type (type);
8194 if (decl_context == PARM)
8196 decl = cp_build_parm_decl (unqualified_id, type);
8198 bad_specifiers (decl, "parameter", virtualp,
8199 memfn_quals != TYPE_UNQUALIFIED,
8200 inlinep, friendp, raises != NULL_TREE);
8202 else if (decl_context == FIELD)
8204 /* The C99 flexible array extension. */
8205 if (!staticp && TREE_CODE (type) == ARRAY_TYPE
8206 && TYPE_DOMAIN (type) == NULL_TREE)
8208 tree itype = compute_array_index_type (dname, integer_zero_node);
8209 type = build_cplus_array_type (TREE_TYPE (type), itype);
8212 if (type == error_mark_node)
8214 /* Happens when declaring arrays of sizes which
8215 are error_mark_node, for example. */
8218 else if (in_namespace && !friendp)
8220 /* Something like struct S { int N::j; }; */
8221 error ("invalid use of %<::%>");
8222 return error_mark_node;
8224 else if (TREE_CODE (type) == FUNCTION_TYPE)
8227 tree function_context;
8231 if (ctype == NULL_TREE)
8232 ctype = current_class_type;
8234 if (ctype == NULL_TREE)
8236 error ("can't make %qD into a method -- not in a class",
8238 return error_mark_node;
8241 /* ``A union may [ ... ] not [ have ] virtual functions.''
8243 if (virtualp && TREE_CODE (ctype) == UNION_TYPE)
8245 error ("function %qD declared virtual inside a union",
8247 return error_mark_node;
8250 if (NEW_DELETE_OPNAME_P (unqualified_id))
8254 error ("%qD cannot be declared virtual, since it "
8260 else if (staticp < 2)
8261 type = build_memfn_type (type, ctype, memfn_quals);
8264 /* Check that the name used for a destructor makes sense. */
8265 if (sfk == sfk_destructor)
8269 gcc_assert (friendp);
8270 error ("expected qualified name in friend declaration "
8271 "for destructor %qD",
8272 id_declarator->u.id.unqualified_name);
8273 return error_mark_node;
8276 if (!same_type_p (TREE_OPERAND
8277 (id_declarator->u.id.unqualified_name, 0),
8280 error ("declaration of %qD as member of %qT",
8281 id_declarator->u.id.unqualified_name, ctype);
8282 return error_mark_node;
8286 /* Tell grokfndecl if it needs to set TREE_PUBLIC on the node. */
8287 function_context = (ctype != NULL_TREE) ?
8288 decl_function_context (TYPE_MAIN_DECL (ctype)) : NULL_TREE;
8289 publicp = (! friendp || ! staticp)
8290 && function_context == NULL_TREE;
8291 decl = grokfndecl (ctype, type,
8292 TREE_CODE (unqualified_id) != TEMPLATE_ID_EXPR
8293 ? unqualified_id : dname,
8296 virtualp, flags, memfn_quals, raises,
8297 friendp ? -1 : 0, friendp, publicp, inlinep,
8299 funcdef_flag, template_count, in_namespace, attrlist);
8300 if (decl == NULL_TREE)
8301 return error_mark_node;
8303 /* This clobbers the attrs stored in `decl' from `attrlist'. */
8304 /* The decl and setting of decl_attr is also turned off. */
8305 decl = build_decl_attribute_variant (decl, decl_attr);
8308 /* [class.conv.ctor]
8310 A constructor declared without the function-specifier
8311 explicit that can be called with a single parameter
8312 specifies a conversion from the type of its first
8313 parameter to the type of its class. Such a constructor
8314 is called a converting constructor. */
8316 DECL_NONCONVERTING_P (decl) = 1;
8317 else if (DECL_CONSTRUCTOR_P (decl))
8319 /* The constructor can be called with exactly one
8320 parameter if there is at least one parameter, and
8321 any subsequent parameters have default arguments.
8322 Ignore any compiler-added parms. */
8323 tree arg_types = FUNCTION_FIRST_USER_PARMTYPE (decl);
8325 if (arg_types == void_list_node
8327 && TREE_CHAIN (arg_types)
8328 && TREE_CHAIN (arg_types) != void_list_node
8329 && !TREE_PURPOSE (TREE_CHAIN (arg_types))))
8330 DECL_NONCONVERTING_P (decl) = 1;
8333 else if (TREE_CODE (type) == METHOD_TYPE)
8335 /* We only get here for friend declarations of
8336 members of other classes. */
8337 /* All method decls are public, so tell grokfndecl to set
8338 TREE_PUBLIC, also. */
8339 decl = grokfndecl (ctype, type,
8340 TREE_CODE (unqualified_id) != TEMPLATE_ID_EXPR
8341 ? unqualified_id : dname,
8344 virtualp, flags, memfn_quals, raises,
8345 friendp ? -1 : 0, friendp, 1, 0, sfk,
8346 funcdef_flag, template_count, in_namespace,
8348 if (decl == NULL_TREE)
8349 return error_mark_node;
8351 else if (!staticp && !dependent_type_p (type)
8352 && !COMPLETE_TYPE_P (complete_type (type))
8353 && (TREE_CODE (type) != ARRAY_TYPE || initialized == 0))
8356 error ("field %qD has incomplete type", unqualified_id);
8358 error ("name %qT has incomplete type", type);
8360 /* If we're instantiating a template, tell them which
8361 instantiation made the field's type be incomplete. */
8362 if (current_class_type
8363 && TYPE_NAME (current_class_type)
8364 && IDENTIFIER_TEMPLATE (TYPE_IDENTIFIER (current_class_type))
8366 && declspecs->type == type)
8367 error (" in instantiation of template %qT",
8368 current_class_type);
8370 return error_mark_node;
8376 error ("%qE is neither function nor member function; "
8377 "cannot be declared friend", unqualified_id);
8385 /* Friends are treated specially. */
8386 if (ctype == current_class_type)
8387 ; /* We already issued a pedwarn. */
8388 else if (decl && DECL_NAME (decl))
8390 if (template_class_depth (current_class_type) == 0)
8392 decl = check_explicit_specialization
8393 (unqualified_id, decl, template_count,
8394 2 * funcdef_flag + 4);
8395 if (decl == error_mark_node)
8396 return error_mark_node;
8399 decl = do_friend (ctype, unqualified_id, decl,
8405 return error_mark_node;
8408 /* Structure field. It may not be a function, except for C++. */
8410 if (decl == NULL_TREE)
8416 /* An attempt is being made to initialize a non-static
8417 member. But, from [class.mem]:
8419 4 A member-declarator can contain a
8420 constant-initializer only if it declares a static
8421 member (_class.static_) of integral or enumeration
8422 type, see _class.static.data_.
8424 This used to be relatively common practice, but
8425 the rest of the compiler does not correctly
8426 handle the initialization unless the member is
8427 static so we make it static below. */
8428 pedwarn ("ISO C++ forbids initialization of member %qD",
8430 pedwarn ("making %qD static", unqualified_id);
8434 if (uses_template_parms (type))
8435 /* We'll check at instantiation time. */
8437 else if (check_static_variable_definition (unqualified_id,
8439 /* If we just return the declaration, crashes
8440 will sometimes occur. We therefore return
8441 void_type_node, as if this was a friend
8442 declaration, to cause callers to completely
8443 ignore this declaration. */
8444 return error_mark_node;
8449 /* C++ allows static class members. All other work
8450 for this is done by grokfield. */
8451 decl = build_lang_decl (VAR_DECL, unqualified_id, type);
8452 set_linkage_for_static_data_member (decl);
8453 /* Even if there is an in-class initialization, DECL
8454 is considered undefined until an out-of-class
8455 definition is provided. */
8456 DECL_EXTERNAL (decl) = 1;
8460 if (targetm.have_tls)
8461 DECL_TLS_MODEL (decl) = decl_default_tls_model (decl);
8463 /* A mere warning is sure to result in improper
8464 semantics at runtime. Don't bother to allow this to
8466 error ("thread-local storage not supported for this target");
8471 decl = build_decl (FIELD_DECL, unqualified_id, type);
8472 DECL_NONADDRESSABLE_P (decl) = bitfield;
8473 if (storage_class == sc_mutable)
8475 DECL_MUTABLE_P (decl) = 1;
8476 storage_class = sc_none;
8480 bad_specifiers (decl, "field", virtualp,
8481 memfn_quals != TYPE_UNQUALIFIED,
8482 inlinep, friendp, raises != NULL_TREE);
8485 else if (TREE_CODE (type) == FUNCTION_TYPE
8486 || TREE_CODE (type) == METHOD_TYPE)
8491 if (!unqualified_id)
8492 return error_mark_node;
8494 if (TREE_CODE (unqualified_id) == TEMPLATE_ID_EXPR)
8495 original_name = dname;
8497 original_name = unqualified_id;
8499 if (storage_class == sc_auto)
8500 error ("storage class %<auto%> invalid for function %qs", name);
8501 else if (storage_class == sc_register)
8502 error ("storage class %<register%> invalid for function %qs", name);
8504 error ("storage class %<__thread%> invalid for function %qs", name);
8506 /* Function declaration not at top level.
8507 Storage classes other than `extern' are not allowed
8508 and `extern' makes no difference. */
8509 if (! toplevel_bindings_p ()
8510 && (storage_class == sc_static
8511 || declspecs->specs[(int)ds_inline])
8514 if (storage_class == sc_static)
8515 pedwarn ("%<static%> specified invalid for function %qs "
8516 "declared out of global scope", name);
8518 pedwarn ("%<inline%> specifier invalid for function %qs "
8519 "declared out of global scope", name);
8522 if (ctype == NULL_TREE)
8526 error ("virtual non-class function %qs", name);
8530 else if (TREE_CODE (type) == FUNCTION_TYPE && staticp < 2
8531 && !NEW_DELETE_OPNAME_P (original_name))
8532 type = build_method_type_directly (ctype,
8534 TYPE_ARG_TYPES (type));
8536 /* Record presence of `static'. */
8537 publicp = (ctype != NULL_TREE
8538 || storage_class == sc_extern
8539 || storage_class != sc_static);
8541 decl = grokfndecl (ctype, type, original_name, parms, unqualified_id,
8542 virtualp, flags, memfn_quals, raises,
8544 publicp, inlinep, sfk, funcdef_flag,
8545 template_count, in_namespace, attrlist);
8546 if (decl == NULL_TREE)
8547 return error_mark_node;
8551 int invalid_static = 0;
8553 /* Don't allow a static member function in a class, and forbid
8554 declaring main to be static. */
8555 if (TREE_CODE (type) == METHOD_TYPE)
8557 pedwarn ("cannot declare member function %qD to have "
8558 "static linkage", decl);
8561 else if (current_function_decl)
8563 /* FIXME need arm citation */
8564 error ("cannot declare static function inside another function");
8571 storage_class = sc_none;
8577 /* It's a variable. */
8579 /* An uninitialized decl with `extern' is a reference. */
8580 decl = grokvardecl (type, unqualified_id,
8583 (type_quals & TYPE_QUAL_CONST) != 0,
8584 ctype ? ctype : in_namespace);
8585 bad_specifiers (decl, "variable", virtualp,
8586 memfn_quals != TYPE_UNQUALIFIED,
8587 inlinep, friendp, raises != NULL_TREE);
8591 DECL_CONTEXT (decl) = ctype;
8594 pedwarn ("%<static%> may not be used when defining "
8595 "(as opposed to declaring) a static data member");
8597 storage_class = sc_none;
8599 if (storage_class == sc_register && TREE_STATIC (decl))
8601 error ("static member %qD declared %<register%>", decl);
8602 storage_class = sc_none;
8604 if (storage_class == sc_extern && pedantic)
8606 pedwarn ("cannot explicitly declare member %q#D to have "
8609 storage_class = sc_none;
8614 /* Record `register' declaration for warnings on &
8615 and in case doing stupid register allocation. */
8617 if (storage_class == sc_register)
8618 DECL_REGISTER (decl) = 1;
8619 else if (storage_class == sc_extern)
8620 DECL_THIS_EXTERN (decl) = 1;
8621 else if (storage_class == sc_static)
8622 DECL_THIS_STATIC (decl) = 1;
8624 /* Record constancy and volatility. There's no need to do this
8625 when processing a template; we'll do this for the instantiated
8626 declaration based on the type of DECL. */
8627 if (!processing_template_decl)
8628 cp_apply_type_quals_to_decl (type_quals, decl);
8634 /* Subroutine of start_function. Ensure that each of the parameter
8635 types (as listed in PARMS) is complete, as is required for a
8636 function definition. */
8639 require_complete_types_for_parms (tree parms)
8641 for (; parms; parms = TREE_CHAIN (parms))
8643 if (dependent_type_p (TREE_TYPE (parms)))
8645 if (!VOID_TYPE_P (TREE_TYPE (parms))
8646 && complete_type_or_else (TREE_TYPE (parms), parms))
8648 relayout_decl (parms);
8649 DECL_ARG_TYPE (parms) = type_passed_as (TREE_TYPE (parms));
8652 /* grokparms or complete_type_or_else will have already issued
8654 TREE_TYPE (parms) = error_mark_node;
8658 /* Returns nonzero if T is a local variable. */
8661 local_variable_p (tree t)
8663 if ((TREE_CODE (t) == VAR_DECL
8664 /* A VAR_DECL with a context that is a _TYPE is a static data
8666 && !TYPE_P (CP_DECL_CONTEXT (t))
8667 /* Any other non-local variable must be at namespace scope. */
8668 && !DECL_NAMESPACE_SCOPE_P (t))
8669 || (TREE_CODE (t) == PARM_DECL))
8675 /* Returns nonzero if T is an automatic local variable or a label.
8676 (These are the declarations that need to be remapped when the code
8677 containing them is duplicated.) */
8680 nonstatic_local_decl_p (tree t)
8682 return ((local_variable_p (t) && !TREE_STATIC (t))
8683 || TREE_CODE (t) == LABEL_DECL
8684 || TREE_CODE (t) == RESULT_DECL);
8687 /* Like local_variable_p, but suitable for use as a tree-walking
8691 local_variable_p_walkfn (tree *tp, int *walk_subtrees,
8692 void *data ATTRIBUTE_UNUSED)
8694 if (local_variable_p (*tp) && !DECL_ARTIFICIAL (*tp))
8696 else if (TYPE_P (*tp))
8703 /* Check that ARG, which is a default-argument expression for a
8704 parameter DECL, is valid. Returns ARG, or ERROR_MARK_NODE, if
8705 something goes wrong. DECL may also be a _TYPE node, rather than a
8706 DECL, if there is no DECL available. */
8709 check_default_argument (tree decl, tree arg)
8714 if (TREE_CODE (arg) == DEFAULT_ARG)
8715 /* We get a DEFAULT_ARG when looking at an in-class declaration
8716 with a default argument. Ignore the argument for now; we'll
8717 deal with it after the class is complete. */
8726 decl_type = TREE_TYPE (decl);
8728 if (arg == error_mark_node
8729 || decl == error_mark_node
8730 || TREE_TYPE (arg) == error_mark_node
8731 || decl_type == error_mark_node)
8732 /* Something already went wrong. There's no need to check
8734 return error_mark_node;
8736 /* [dcl.fct.default]
8738 A default argument expression is implicitly converted to the
8740 if (!TREE_TYPE (arg)
8741 || !can_convert_arg (decl_type, TREE_TYPE (arg), arg, LOOKUP_NORMAL))
8744 error ("default argument for %q#D has type %qT",
8745 decl, TREE_TYPE (arg));
8747 error ("default argument for parameter of type %qT has type %qT",
8748 decl_type, TREE_TYPE (arg));
8750 return error_mark_node;
8753 /* [dcl.fct.default]
8755 Local variables shall not be used in default argument
8758 The keyword `this' shall not be used in a default argument of a
8760 var = walk_tree_without_duplicates (&arg, local_variable_p_walkfn,
8764 error ("default argument %qE uses local variable %qD", arg, var);
8765 return error_mark_node;
8772 /* Decode the list of parameter types for a function type.
8773 Given the list of things declared inside the parens,
8774 return a list of types.
8776 If this parameter does not end with an ellipsis, we append
8779 *PARMS is set to the chain of PARM_DECLs created. */
8782 grokparms (cp_parameter_declarator *first_parm, tree *parms)
8784 tree result = NULL_TREE;
8785 tree decls = NULL_TREE;
8786 int ellipsis = !first_parm || first_parm->ellipsis_p;
8787 cp_parameter_declarator *parm;
8790 for (parm = first_parm; parm != NULL; parm = parm->next)
8792 tree type = NULL_TREE;
8793 tree init = parm->default_argument;
8797 if (parm == no_parameters)
8800 attrs = parm->decl_specifiers.attributes;
8801 parm->decl_specifiers.attributes = NULL_TREE;
8802 decl = grokdeclarator (parm->declarator, &parm->decl_specifiers,
8803 PARM, init != NULL_TREE, &attrs);
8804 if (! decl || TREE_TYPE (decl) == error_mark_node)
8808 cplus_decl_attributes (&decl, attrs, 0);
8810 type = TREE_TYPE (decl);
8811 if (VOID_TYPE_P (type))
8813 if (same_type_p (type, void_type_node)
8814 && DECL_SELF_REFERENCE_P (type)
8815 && !DECL_NAME (decl) && !result && !parm->next && !ellipsis)
8816 /* this is a parmlist of `(void)', which is ok. */
8818 cxx_incomplete_type_error (decl, type);
8819 /* It's not a good idea to actually create parameters of
8820 type `void'; other parts of the compiler assume that a
8821 void type terminates the parameter list. */
8822 type = error_mark_node;
8823 TREE_TYPE (decl) = error_mark_node;
8826 if (type != error_mark_node)
8828 /* Top-level qualifiers on the parameters are
8829 ignored for function types. */
8830 type = cp_build_qualified_type (type, 0);
8831 if (TREE_CODE (type) == METHOD_TYPE)
8833 error ("parameter %qD invalidly declared method type", decl);
8834 type = build_pointer_type (type);
8835 TREE_TYPE (decl) = type;
8837 else if (abstract_virtuals_error (decl, type))
8838 any_error = 1; /* Seems like a good idea. */
8839 else if (POINTER_TYPE_P (type))
8841 /* [dcl.fct]/6, parameter types cannot contain pointers
8842 (references) to arrays of unknown bound. */
8843 tree t = TREE_TYPE (type);
8844 int ptr = TYPE_PTR_P (type);
8850 else if (TREE_CODE (t) != ARRAY_TYPE)
8852 else if (!TYPE_DOMAIN (t))
8856 if (TREE_CODE (t) == ARRAY_TYPE)
8857 error ("parameter %qD includes %s to array of unknown "
8859 decl, ptr ? "pointer" : "reference", t);
8864 else if (init && !processing_template_decl)
8865 init = check_default_argument (decl, init);
8868 TREE_CHAIN (decl) = decls;
8870 result = tree_cons (init, type, result);
8872 decls = nreverse (decls);
8873 result = nreverse (result);
8875 result = chainon (result, void_list_node);
8882 /* D is a constructor or overloaded `operator='.
8884 Let T be the class in which D is declared. Then, this function
8887 -1 if D's is an ill-formed constructor or copy assignment operator
8888 whose first parameter is of type `T'.
8889 0 if D is not a copy constructor or copy assignment
8891 1 if D is a copy constructor or copy assignment operator whose
8892 first parameter is a reference to const qualified T.
8893 2 if D is a copy constructor or copy assignment operator whose
8894 first parameter is a reference to non-const qualified T.
8896 This function can be used as a predicate. Positive values indicate
8897 a copy constructor and nonzero values indicate a copy assignment
8907 gcc_assert (DECL_FUNCTION_MEMBER_P (d));
8909 if (TREE_CODE (d) == TEMPLATE_DECL
8910 || (DECL_TEMPLATE_INFO (d)
8911 && DECL_MEMBER_TEMPLATE_P (DECL_TI_TEMPLATE (d))))
8912 /* Instantiations of template member functions are never copy
8913 functions. Note that member functions of templated classes are
8914 represented as template functions internally, and we must
8915 accept those as copy functions. */
8918 args = FUNCTION_FIRST_USER_PARMTYPE (d);
8922 arg_type = TREE_VALUE (args);
8923 if (arg_type == error_mark_node)
8926 if (TYPE_MAIN_VARIANT (arg_type) == DECL_CONTEXT (d))
8928 /* Pass by value copy assignment operator. */
8931 else if (TREE_CODE (arg_type) == REFERENCE_TYPE
8932 && TYPE_MAIN_VARIANT (TREE_TYPE (arg_type)) == DECL_CONTEXT (d))
8934 if (CP_TYPE_CONST_P (TREE_TYPE (arg_type)))
8940 args = TREE_CHAIN (args);
8942 if (args && args != void_list_node && !TREE_PURPOSE (args))
8943 /* There are more non-optional args. */
8949 /* Remember any special properties of member function DECL. */
8951 void grok_special_member_properties (tree decl)
8955 if (!DECL_NONSTATIC_MEMBER_FUNCTION_P (decl))
8958 class_type = DECL_CONTEXT (decl);
8959 if (DECL_CONSTRUCTOR_P (decl))
8961 int ctor = copy_fn_p (decl);
8963 TYPE_HAS_CONSTRUCTOR (class_type) = 1;
8969 A non-template constructor for class X is a copy
8970 constructor if its first parameter is of type X&, const
8971 X&, volatile X& or const volatile X&, and either there
8972 are no other parameters or else all other parameters have
8973 default arguments. */
8974 TYPE_HAS_INIT_REF (class_type) = 1;
8976 TYPE_HAS_CONST_INIT_REF (class_type) = 1;
8978 else if (sufficient_parms_p (FUNCTION_FIRST_USER_PARMTYPE (decl)))
8979 TYPE_HAS_DEFAULT_CONSTRUCTOR (class_type) = 1;
8981 else if (DECL_OVERLOADED_OPERATOR_P (decl) == NOP_EXPR)
8985 A non-template assignment operator for class X is a copy
8986 assignment operator if its parameter is of type X, X&, const
8987 X&, volatile X& or const volatile X&. */
8989 int assop = copy_fn_p (decl);
8993 TYPE_HAS_ASSIGN_REF (class_type) = 1;
8995 TYPE_HAS_CONST_ASSIGN_REF (class_type) = 1;
9000 /* Check a constructor DECL has the correct form. Complains
9001 if the class has a constructor of the form X(X). */
9004 grok_ctor_properties (tree ctype, tree decl)
9006 int ctor_parm = copy_fn_p (decl);
9012 A declaration of a constructor for a class X is ill-formed if
9013 its first parameter is of type (optionally cv-qualified) X
9014 and either there are no other parameters or else all other
9015 parameters have default arguments.
9017 We *don't* complain about member template instantiations that
9018 have this form, though; they can occur as we try to decide
9019 what constructor to use during overload resolution. Since
9020 overload resolution will never prefer such a constructor to
9021 the non-template copy constructor (which is either explicitly
9022 or implicitly defined), there's no need to worry about their
9023 existence. Theoretically, they should never even be
9024 instantiated, but that's hard to forestall. */
9025 error ("invalid constructor; you probably meant %<%T (const %T&)%>",
9033 /* An operator with this code is unary, but can also be binary. */
9036 ambi_op_p (enum tree_code code)
9038 return (code == INDIRECT_REF
9039 || code == ADDR_EXPR
9040 || code == UNARY_PLUS_EXPR
9041 || code == NEGATE_EXPR
9042 || code == PREINCREMENT_EXPR
9043 || code == PREDECREMENT_EXPR);
9046 /* An operator with this name can only be unary. */
9049 unary_op_p (enum tree_code code)
9051 return (code == TRUTH_NOT_EXPR
9052 || code == BIT_NOT_EXPR
9053 || code == COMPONENT_REF
9054 || code == TYPE_EXPR);
9057 /* DECL is a declaration for an overloaded operator. If COMPLAIN is true,
9058 errors are issued for invalid declarations. */
9061 grok_op_properties (tree decl, bool complain)
9063 tree argtypes = TYPE_ARG_TYPES (TREE_TYPE (decl));
9065 int methodp = (TREE_CODE (TREE_TYPE (decl)) == METHOD_TYPE);
9066 tree name = DECL_NAME (decl);
9067 enum tree_code operator_code;
9072 /* Count the number of arguments and check for ellipsis. */
9073 for (argtype = argtypes, arity = 0;
9074 argtype && argtype != void_list_node;
9075 argtype = TREE_CHAIN (argtype))
9077 ellipsis_p = !argtype;
9079 class_type = DECL_CONTEXT (decl);
9080 if (class_type && !CLASS_TYPE_P (class_type))
9081 class_type = NULL_TREE;
9083 if (DECL_CONV_FN_P (decl))
9084 operator_code = TYPE_EXPR;
9088 #define DEF_OPERATOR(NAME, CODE, MANGLING, ARITY, ASSN_P) \
9089 if (ansi_opname (CODE) == name) \
9091 operator_code = (CODE); \
9094 else if (ansi_assopname (CODE) == name) \
9096 operator_code = (CODE); \
9097 DECL_ASSIGNMENT_OPERATOR_P (decl) = 1; \
9101 #include "operators.def"
9107 gcc_assert (operator_code != LAST_CPLUS_TREE_CODE);
9108 SET_OVERLOADED_OPERATOR_CODE (decl, operator_code);
9111 switch (operator_code)
9114 TYPE_HAS_NEW_OPERATOR (class_type) = 1;
9118 TYPE_GETS_DELETE (class_type) |= 1;
9122 TYPE_HAS_ARRAY_NEW_OPERATOR (class_type) = 1;
9125 case VEC_DELETE_EXPR:
9126 TYPE_GETS_DELETE (class_type) |= 2;
9133 /* [basic.std.dynamic.allocation]/1:
9135 A program is ill-formed if an allocation function is declared
9136 in a namespace scope other than global scope or declared static
9139 The same also holds true for deallocation functions. */
9140 if (operator_code == NEW_EXPR || operator_code == VEC_NEW_EXPR
9141 || operator_code == DELETE_EXPR || operator_code == VEC_DELETE_EXPR)
9143 if (DECL_NAMESPACE_SCOPE_P (decl))
9145 if (CP_DECL_CONTEXT (decl) != global_namespace)
9147 error ("%qD may not be declared within a namespace", decl);
9150 else if (!TREE_PUBLIC (decl))
9152 error ("%qD may not be declared as static", decl);
9158 if (operator_code == NEW_EXPR || operator_code == VEC_NEW_EXPR)
9159 TREE_TYPE (decl) = coerce_new_type (TREE_TYPE (decl));
9160 else if (operator_code == DELETE_EXPR || operator_code == VEC_DELETE_EXPR)
9161 TREE_TYPE (decl) = coerce_delete_type (TREE_TYPE (decl));
9164 /* An operator function must either be a non-static member function
9165 or have at least one parameter of a class, a reference to a class,
9166 an enumeration, or a reference to an enumeration. 13.4.0.6 */
9167 if (! methodp || DECL_STATIC_FUNCTION_P (decl))
9169 if (operator_code == TYPE_EXPR
9170 || operator_code == CALL_EXPR
9171 || operator_code == COMPONENT_REF
9172 || operator_code == ARRAY_REF
9173 || operator_code == NOP_EXPR)
9175 error ("%qD must be a nonstatic member function", decl);
9182 if (DECL_STATIC_FUNCTION_P (decl))
9184 error ("%qD must be either a non-static member "
9185 "function or a non-member function", decl);
9189 for (p = argtypes; p && p != void_list_node; p = TREE_CHAIN (p))
9191 tree arg = non_reference (TREE_VALUE (p));
9192 if (arg == error_mark_node)
9195 /* IS_AGGR_TYPE, rather than CLASS_TYPE_P, is used
9196 because these checks are performed even on
9197 template functions. */
9198 if (IS_AGGR_TYPE (arg) || TREE_CODE (arg) == ENUMERAL_TYPE)
9202 if (!p || p == void_list_node)
9205 error ("%qD must have an argument of class or "
9206 "enumerated type", decl);
9212 /* There are no restrictions on the arguments to an overloaded
9214 if (operator_code == CALL_EXPR)
9217 /* Warn about conversion operators that will never be used. */
9218 if (IDENTIFIER_TYPENAME_P (name)
9219 && ! DECL_TEMPLATE_INFO (decl)
9221 /* Warn only declaring the function; there is no need to
9222 warn again about out-of-class definitions. */
9223 && class_type == current_class_type)
9225 tree t = TREE_TYPE (name);
9226 int ref = (TREE_CODE (t) == REFERENCE_TYPE);
9227 const char *what = 0;
9230 t = TYPE_MAIN_VARIANT (TREE_TYPE (t));
9232 if (TREE_CODE (t) == VOID_TYPE)
9234 else if (class_type)
9236 if (t == class_type)
9237 what = "the same type";
9238 /* Don't force t to be complete here. */
9239 else if (IS_AGGR_TYPE (t)
9240 && COMPLETE_TYPE_P (t)
9241 && DERIVED_FROM_P (t, class_type))
9242 what = "a base class";
9246 warning (OPT_Wconversion, "conversion to %s%s will never use a type "
9247 "conversion operator",
9248 ref ? "a reference to " : "", what);
9251 if (operator_code == COND_EXPR)
9254 error ("ISO C++ prohibits overloading operator ?:");
9257 else if (ellipsis_p)
9259 error ("%qD must not have variable number of arguments", decl);
9262 else if (ambi_op_p (operator_code))
9265 /* We pick the one-argument operator codes by default, so
9266 we don't have to change anything. */
9268 else if (arity == 2)
9270 /* If we thought this was a unary operator, we now know
9271 it to be a binary operator. */
9272 switch (operator_code)
9275 operator_code = MULT_EXPR;
9279 operator_code = BIT_AND_EXPR;
9282 case UNARY_PLUS_EXPR:
9283 operator_code = PLUS_EXPR;
9287 operator_code = MINUS_EXPR;
9290 case PREINCREMENT_EXPR:
9291 operator_code = POSTINCREMENT_EXPR;
9294 case PREDECREMENT_EXPR:
9295 operator_code = POSTDECREMENT_EXPR;
9302 SET_OVERLOADED_OPERATOR_CODE (decl, operator_code);
9304 if ((operator_code == POSTINCREMENT_EXPR
9305 || operator_code == POSTDECREMENT_EXPR)
9306 && ! processing_template_decl
9307 && ! same_type_p (TREE_VALUE (TREE_CHAIN (argtypes)), integer_type_node))
9310 error ("postfix %qD must take %<int%> as its argument",
9313 error ("postfix %qD must take %<int%> as its second "
9321 error ("%qD must take either zero or one argument", decl);
9323 error ("%qD must take either one or two arguments", decl);
9327 /* More Effective C++ rule 6. */
9329 && (operator_code == POSTINCREMENT_EXPR
9330 || operator_code == POSTDECREMENT_EXPR
9331 || operator_code == PREINCREMENT_EXPR
9332 || operator_code == PREDECREMENT_EXPR))
9334 tree arg = TREE_VALUE (argtypes);
9335 tree ret = TREE_TYPE (TREE_TYPE (decl));
9336 if (methodp || TREE_CODE (arg) == REFERENCE_TYPE)
9337 arg = TREE_TYPE (arg);
9338 arg = TYPE_MAIN_VARIANT (arg);
9339 if (operator_code == PREINCREMENT_EXPR
9340 || operator_code == PREDECREMENT_EXPR)
9342 if (TREE_CODE (ret) != REFERENCE_TYPE
9343 || !same_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (ret)),
9345 warning (OPT_Weffc__, "prefix %qD should return %qT", decl,
9346 build_reference_type (arg));
9350 if (!same_type_p (TYPE_MAIN_VARIANT (ret), arg))
9351 warning (OPT_Weffc__, "postfix %qD should return %qT", decl, arg);
9355 else if (unary_op_p (operator_code))
9360 error ("%qD must take %<void%>", decl);
9362 error ("%qD must take exactly one argument", decl);
9366 else /* if (binary_op_p (operator_code)) */
9371 error ("%qD must take exactly one argument", decl);
9373 error ("%qD must take exactly two arguments", decl);
9377 /* More Effective C++ rule 7. */
9379 && (operator_code == TRUTH_ANDIF_EXPR
9380 || operator_code == TRUTH_ORIF_EXPR
9381 || operator_code == COMPOUND_EXPR))
9382 warning (OPT_Weffc__, "user-defined %qD always evaluates both arguments",
9386 /* Effective C++ rule 23. */
9389 && !DECL_ASSIGNMENT_OPERATOR_P (decl)
9390 && (operator_code == PLUS_EXPR
9391 || operator_code == MINUS_EXPR
9392 || operator_code == TRUNC_DIV_EXPR
9393 || operator_code == MULT_EXPR
9394 || operator_code == TRUNC_MOD_EXPR)
9395 && TREE_CODE (TREE_TYPE (TREE_TYPE (decl))) == REFERENCE_TYPE)
9396 warning (OPT_Weffc__, "%qD should return by value", decl);
9399 for (; argtypes && argtypes != void_list_node;
9400 argtypes = TREE_CHAIN (argtypes))
9401 if (TREE_PURPOSE (argtypes))
9403 TREE_PURPOSE (argtypes) = NULL_TREE;
9404 if (operator_code == POSTINCREMENT_EXPR
9405 || operator_code == POSTDECREMENT_EXPR)
9408 pedwarn ("%qD cannot have default arguments", decl);
9412 error ("%qD cannot have default arguments", decl);
9420 /* Return a string giving the keyword associate with CODE. */
9423 tag_name (enum tag_types code)
9442 /* Name lookup in an elaborated-type-specifier (after the keyword
9443 indicated by TAG_CODE) has found the TYPE_DECL DECL. If the
9444 elaborated-type-specifier is invalid, issue a diagnostic and return
9445 error_mark_node; otherwise, return the *_TYPE to which it referred.
9446 If ALLOW_TEMPLATE_P is true, TYPE may be a class template. */
9449 check_elaborated_type_specifier (enum tag_types tag_code,
9451 bool allow_template_p)
9457 struct S { struct S *p; };
9459 name lookup will find the TYPE_DECL for the implicit "S::S"
9460 typedef. Adjust for that here. */
9461 if (DECL_SELF_REFERENCE_P (decl))
9462 decl = TYPE_NAME (TREE_TYPE (decl));
9464 type = TREE_TYPE (decl);
9466 /* Check TEMPLATE_TYPE_PARM first because DECL_IMPLICIT_TYPEDEF_P
9467 is false for this case as well. */
9468 if (TREE_CODE (type) == TEMPLATE_TYPE_PARM)
9470 error ("using template type parameter %qT after %qs",
9471 type, tag_name (tag_code));
9472 return error_mark_node;
9476 If the identifier resolves to a typedef-name or a template
9477 type-parameter, the elaborated-type-specifier is ill-formed.
9479 In other words, the only legitimate declaration to use in the
9480 elaborated type specifier is the implicit typedef created when
9481 the type is declared. */
9482 else if (!DECL_IMPLICIT_TYPEDEF_P (decl)
9483 && tag_code != typename_type)
9485 error ("using typedef-name %qD after %qs", decl, tag_name (tag_code));
9486 error ("%q+D has a previous declaration here", decl);
9487 return error_mark_node;
9489 else if (TREE_CODE (type) != RECORD_TYPE
9490 && TREE_CODE (type) != UNION_TYPE
9491 && tag_code != enum_type
9492 && tag_code != typename_type)
9494 error ("%qT referred to as %qs", type, tag_name (tag_code));
9495 error ("%q+T has a previous declaration here", type);
9496 return error_mark_node;
9498 else if (TREE_CODE (type) != ENUMERAL_TYPE
9499 && tag_code == enum_type)
9501 error ("%qT referred to as enum", type);
9502 error ("%q+T has a previous declaration here", type);
9503 return error_mark_node;
9505 else if (!allow_template_p
9506 && TREE_CODE (type) == RECORD_TYPE
9507 && CLASSTYPE_IS_TEMPLATE (type))
9509 /* If a class template appears as elaborated type specifier
9510 without a template header such as:
9512 template <class T> class C {};
9513 void f(class C); // No template header here
9515 then the required template argument is missing. */
9516 error ("template argument required for %<%s %T%>",
9517 tag_name (tag_code),
9518 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type)));
9519 return error_mark_node;
9525 /* Lookup NAME in elaborate type specifier in scope according to
9526 SCOPE and issue diagnostics if necessary.
9527 Return *_TYPE node upon success, NULL_TREE when the NAME is not
9528 found, and ERROR_MARK_NODE for type error. */
9531 lookup_and_check_tag (enum tag_types tag_code, tree name,
9532 tag_scope scope, bool template_header_p)
9536 if (scope == ts_global)
9538 /* First try ordinary name lookup, ignoring hidden class name
9539 injected via friend declaration. */
9540 decl = lookup_name_prefer_type (name, 2);
9541 /* If that fails, the name will be placed in the smallest
9542 non-class, non-function-prototype scope according to 3.3.1/5.
9543 We may already have a hidden name declared as friend in this
9544 scope. So lookup again but not ignoring hidden names.
9545 If we find one, that name will be made visible rather than
9546 creating a new tag. */
9548 decl = lookup_type_scope (name, ts_within_enclosing_non_class);
9551 decl = lookup_type_scope (name, scope);
9553 if (decl && DECL_CLASS_TEMPLATE_P (decl))
9554 decl = DECL_TEMPLATE_RESULT (decl);
9556 if (decl && TREE_CODE (decl) == TYPE_DECL)
9558 /* Look for invalid nested type:
9562 if (scope == ts_current && DECL_SELF_REFERENCE_P (decl))
9564 error ("%qD has the same name as the class in which it is "
9567 return error_mark_node;
9570 /* Two cases we need to consider when deciding if a class
9571 template is allowed as an elaborated type specifier:
9572 1. It is a self reference to its own class.
9573 2. It comes with a template header.
9577 template <class T> class C {
9578 class C *c1; // DECL_SELF_REFERENCE_P is true
9581 template <class U> class C; // template_header_p is true
9582 template <class T> class C<T>::D {
9583 class C *c2; // DECL_SELF_REFERENCE_P is true
9586 t = check_elaborated_type_specifier (tag_code,
9589 | DECL_SELF_REFERENCE_P (decl));
9596 /* Get the struct, enum or union (TAG_CODE says which) with tag NAME.
9597 Define the tag as a forward-reference if it is not defined.
9599 If a declaration is given, process it here, and report an error if
9600 multiple declarations are not identical.
9602 SCOPE is TS_CURRENT when this is also a definition. Only look in
9603 the current frame for the name (since C++ allows new names in any
9604 scope.) It is TS_WITHIN_ENCLOSING_NON_CLASS if this is a friend
9605 declaration. Only look beginning from the current scope outward up
9606 till the nearest non-class scope. Otherwise it is TS_GLOBAL.
9608 TEMPLATE_HEADER_P is true when this declaration is preceded by
9609 a set of template parameters. */
9612 xref_tag (enum tag_types tag_code, tree name,
9613 tag_scope scope, bool template_header_p)
9615 enum tree_code code;
9617 tree context = NULL_TREE;
9619 timevar_push (TV_NAME_LOOKUP);
9621 gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE);
9633 code = ENUMERAL_TYPE;
9639 /* In case of anonymous name, xref_tag is only called to
9640 make type node and push name. Name lookup is not required. */
9641 if (ANON_AGGRNAME_P (name))
9644 t = lookup_and_check_tag (tag_code, name,
9645 scope, template_header_p);
9647 if (t == error_mark_node)
9648 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
9650 if (scope != ts_current && t && current_class_type
9651 && template_class_depth (current_class_type)
9652 && template_header_p)
9654 /* Since SCOPE is not TS_CURRENT, we are not looking at a
9655 definition of this tag. Since, in addition, we are currently
9656 processing a (member) template declaration of a template
9657 class, we must be very careful; consider:
9664 { template <class V>
9665 friend struct S1; };
9667 Here, the S2::S1 declaration should not be confused with the
9668 outer declaration. In particular, the inner version should
9669 have a template parameter of level 2, not level 1. This
9670 would be particularly important if the member declaration
9673 template <class V = U> friend struct S1;
9675 say, when we should tsubst into `U' when instantiating
9676 S2. On the other hand, when presented with:
9686 we must find the inner binding eventually. We
9687 accomplish this by making sure that the new type we
9688 create to represent this declaration has the right
9690 context = TYPE_CONTEXT (t);
9696 /* If no such tag is yet defined, create a forward-reference node
9697 and record it as the "definition".
9698 When a real declaration of this type is found,
9699 the forward-reference will be altered into a real type. */
9700 if (code == ENUMERAL_TYPE)
9702 error ("use of enum %q#D without previous declaration", name);
9703 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
9707 t = make_aggr_type (code);
9708 TYPE_CONTEXT (t) = context;
9709 t = pushtag (name, t, scope);
9714 if (template_header_p && IS_AGGR_TYPE (t))
9716 if (!redeclare_class_template (t, current_template_parms))
9717 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
9719 else if (!processing_template_decl
9721 && CLASSTYPE_IS_TEMPLATE (t))
9723 error ("redeclaration of %qT as a non-template", t);
9724 error ("previous declaration %q+D", t);
9725 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
9728 /* Make injected friend class visible. */
9729 if (scope != ts_within_enclosing_non_class
9730 && hidden_name_p (TYPE_NAME (t)))
9732 DECL_ANTICIPATED (TYPE_NAME (t)) = 0;
9733 DECL_FRIEND_P (TYPE_NAME (t)) = 0;
9735 if (TYPE_TEMPLATE_INFO (t))
9737 DECL_ANTICIPATED (TYPE_TI_TEMPLATE (t)) = 0;
9738 DECL_FRIEND_P (TYPE_TI_TEMPLATE (t)) = 0;
9743 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, t);
9747 xref_tag_from_type (tree old, tree id, tag_scope scope)
9749 enum tag_types tag_kind;
9751 if (TREE_CODE (old) == RECORD_TYPE)
9752 tag_kind = (CLASSTYPE_DECLARED_CLASS (old) ? class_type : record_type);
9754 tag_kind = union_type;
9756 if (id == NULL_TREE)
9757 id = TYPE_IDENTIFIER (old);
9759 return xref_tag (tag_kind, id, scope, false);
9762 /* Create the binfo hierarchy for REF with (possibly NULL) base list
9763 BASE_LIST. For each element on BASE_LIST the TREE_PURPOSE is an
9764 access_* node, and the TREE_VALUE is the type of the base-class.
9765 Non-NULL TREE_TYPE indicates virtual inheritance. */
9768 xref_basetypes (tree ref, tree base_list)
9771 tree binfo, base_binfo;
9772 unsigned max_vbases = 0; /* Maximum direct & indirect virtual bases. */
9773 unsigned max_bases = 0; /* Maximum direct bases. */
9775 tree default_access;
9776 tree igo_prev; /* Track Inheritance Graph Order. */
9778 if (ref == error_mark_node)
9781 /* The base of a derived class is private by default, all others are
9783 default_access = (TREE_CODE (ref) == RECORD_TYPE
9784 && CLASSTYPE_DECLARED_CLASS (ref)
9785 ? access_private_node : access_public_node);
9787 /* First, make sure that any templates in base-classes are
9788 instantiated. This ensures that if we call ourselves recursively
9789 we do not get confused about which classes are marked and which
9794 tree basetype = TREE_VALUE (*basep);
9796 if (!(processing_template_decl && uses_template_parms (basetype))
9797 && !complete_type_or_else (basetype, NULL))
9798 /* An incomplete type. Remove it from the list. */
9799 *basep = TREE_CHAIN (*basep);
9803 if (TREE_TYPE (*basep))
9805 if (CLASS_TYPE_P (basetype))
9806 max_vbases += VEC_length (tree, CLASSTYPE_VBASECLASSES (basetype));
9807 basep = &TREE_CHAIN (*basep);
9811 TYPE_MARKED_P (ref) = 1;
9813 /* The binfo slot should be empty, unless this is an (ill-formed)
9815 gcc_assert (!TYPE_BINFO (ref) || TYPE_SIZE (ref));
9816 gcc_assert (TYPE_MAIN_VARIANT (ref) == ref);
9818 binfo = make_tree_binfo (max_bases);
9820 TYPE_BINFO (ref) = binfo;
9821 BINFO_OFFSET (binfo) = size_zero_node;
9822 BINFO_TYPE (binfo) = ref;
9826 BINFO_BASE_ACCESSES (binfo) = VEC_alloc (tree, gc, max_bases);
9827 /* An aggregate cannot have baseclasses. */
9828 CLASSTYPE_NON_AGGREGATE (ref) = 1;
9830 if (TREE_CODE (ref) == UNION_TYPE)
9831 error ("derived union %qT invalid", ref);
9836 if (TYPE_FOR_JAVA (ref))
9837 error ("Java class %qT cannot have multiple bases", ref);
9842 CLASSTYPE_VBASECLASSES (ref) = VEC_alloc (tree, gc, max_vbases);
9844 if (TYPE_FOR_JAVA (ref))
9845 error ("Java class %qT cannot have virtual bases", ref);
9848 for (igo_prev = binfo; base_list; base_list = TREE_CHAIN (base_list))
9850 tree access = TREE_PURPOSE (base_list);
9851 int via_virtual = TREE_TYPE (base_list) != NULL_TREE;
9852 tree basetype = TREE_VALUE (base_list);
9854 if (access == access_default_node)
9855 access = default_access;
9857 if (TREE_CODE (basetype) == TYPE_DECL)
9858 basetype = TREE_TYPE (basetype);
9859 if (TREE_CODE (basetype) != RECORD_TYPE
9860 && TREE_CODE (basetype) != TYPENAME_TYPE
9861 && TREE_CODE (basetype) != TEMPLATE_TYPE_PARM
9862 && TREE_CODE (basetype) != BOUND_TEMPLATE_TEMPLATE_PARM)
9864 error ("base type %qT fails to be a struct or class type",
9869 if (TYPE_FOR_JAVA (basetype) && (current_lang_depth () == 0))
9870 TYPE_FOR_JAVA (ref) = 1;
9872 base_binfo = NULL_TREE;
9873 if (CLASS_TYPE_P (basetype) && !dependent_type_p (basetype))
9875 base_binfo = TYPE_BINFO (basetype);
9876 /* The original basetype could have been a typedef'd type. */
9877 basetype = BINFO_TYPE (base_binfo);
9879 /* Inherit flags from the base. */
9880 TYPE_HAS_NEW_OPERATOR (ref)
9881 |= TYPE_HAS_NEW_OPERATOR (basetype);
9882 TYPE_HAS_ARRAY_NEW_OPERATOR (ref)
9883 |= TYPE_HAS_ARRAY_NEW_OPERATOR (basetype);
9884 TYPE_GETS_DELETE (ref) |= TYPE_GETS_DELETE (basetype);
9885 TYPE_HAS_CONVERSION (ref) |= TYPE_HAS_CONVERSION (basetype);
9886 CLASSTYPE_DIAMOND_SHAPED_P (ref)
9887 |= CLASSTYPE_DIAMOND_SHAPED_P (basetype);
9888 CLASSTYPE_REPEATED_BASE_P (ref)
9889 |= CLASSTYPE_REPEATED_BASE_P (basetype);
9892 /* We must do this test after we've seen through a typedef
9894 if (TYPE_MARKED_P (basetype))
9896 if (basetype == ref)
9897 error ("recursive type %qT undefined", basetype);
9899 error ("duplicate base type %qT invalid", basetype);
9902 TYPE_MARKED_P (basetype) = 1;
9904 base_binfo = copy_binfo (base_binfo, basetype, ref,
9905 &igo_prev, via_virtual);
9906 if (!BINFO_INHERITANCE_CHAIN (base_binfo))
9907 BINFO_INHERITANCE_CHAIN (base_binfo) = binfo;
9909 BINFO_BASE_APPEND (binfo, base_binfo);
9910 BINFO_BASE_ACCESS_APPEND (binfo, access);
9913 if (VEC_space (tree, CLASSTYPE_VBASECLASSES (ref), 1))
9914 /* If we have space in the vbase vector, we must have shared at
9915 least one of them, and are therefore diamond shaped. */
9916 CLASSTYPE_DIAMOND_SHAPED_P (ref) = 1;
9918 /* Unmark all the types. */
9919 for (i = 0; BINFO_BASE_ITERATE (binfo, i, base_binfo); i++)
9920 TYPE_MARKED_P (BINFO_TYPE (base_binfo)) = 0;
9921 TYPE_MARKED_P (ref) = 0;
9923 /* Now see if we have a repeated base type. */
9924 if (!CLASSTYPE_REPEATED_BASE_P (ref))
9926 for (base_binfo = binfo; base_binfo;
9927 base_binfo = TREE_CHAIN (base_binfo))
9929 if (TYPE_MARKED_P (BINFO_TYPE (base_binfo)))
9931 CLASSTYPE_REPEATED_BASE_P (ref) = 1;
9934 TYPE_MARKED_P (BINFO_TYPE (base_binfo)) = 1;
9936 for (base_binfo = binfo; base_binfo;
9937 base_binfo = TREE_CHAIN (base_binfo))
9938 if (TYPE_MARKED_P (BINFO_TYPE (base_binfo)))
9939 TYPE_MARKED_P (BINFO_TYPE (base_binfo)) = 0;
9946 /* Begin compiling the definition of an enumeration type.
9948 Returns the type object, as yet incomplete.
9949 Also records info about it so that build_enumerator
9950 may be used to declare the individual values as they are read. */
9953 start_enum (tree name)
9957 gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE);
9959 /* If this is the real definition for a previous forward reference,
9960 fill in the contents in the same object that used to be the
9961 forward reference. */
9963 enumtype = lookup_and_check_tag (enum_type, name,
9964 /*tag_scope=*/ts_current,
9965 /*template_header_p=*/false);
9967 if (enumtype != NULL_TREE && TREE_CODE (enumtype) == ENUMERAL_TYPE)
9969 error ("multiple definition of %q#T", enumtype);
9970 error ("%Jprevious definition here", TYPE_MAIN_DECL (enumtype));
9971 /* Clear out TYPE_VALUES, and start again. */
9972 TYPE_VALUES (enumtype) = NULL_TREE;
9976 /* In case of error, make a dummy enum to allow parsing to
9978 if (enumtype == error_mark_node)
9979 name = make_anon_name ();
9981 enumtype = make_node (ENUMERAL_TYPE);
9982 enumtype = pushtag (name, enumtype, /*tag_scope=*/ts_current);
9988 /* After processing and defining all the values of an enumeration type,
9989 install their decls in the enumeration type and finish it off.
9990 ENUMTYPE is the type object and VALUES a list of name-value pairs. */
9993 finish_enum (tree enumtype)
10002 bool use_short_enum;
10006 integer_type_kind itk;
10007 tree underlying_type = NULL_TREE;
10009 /* We built up the VALUES in reverse order. */
10010 TYPE_VALUES (enumtype) = nreverse (TYPE_VALUES (enumtype));
10012 /* For an enum defined in a template, just set the type of the values;
10013 all further processing is postponed until the template is
10014 instantiated. We need to set the type so that tsubst of a CONST_DECL
10016 if (processing_template_decl)
10018 for (values = TYPE_VALUES (enumtype);
10020 values = TREE_CHAIN (values))
10021 TREE_TYPE (TREE_VALUE (values)) = enumtype;
10022 if (at_function_scope_p ())
10023 add_stmt (build_min (TAG_DEFN, enumtype));
10027 /* Determine the minimum and maximum values of the enumerators. */
10028 if (TYPE_VALUES (enumtype))
10030 minnode = maxnode = NULL_TREE;
10032 for (values = TYPE_VALUES (enumtype);
10034 values = TREE_CHAIN (values))
10036 decl = TREE_VALUE (values);
10038 /* [dcl.enum]: Following the closing brace of an enum-specifier,
10039 each enumerator has the type of its enumeration. Prior to the
10040 closing brace, the type of each enumerator is the type of its
10041 initializing value. */
10042 TREE_TYPE (decl) = enumtype;
10044 /* Update the minimum and maximum values, if appropriate. */
10045 value = DECL_INITIAL (decl);
10046 if (value == error_mark_node)
10047 value = integer_zero_node;
10048 /* Figure out what the minimum and maximum values of the
10049 enumerators are. */
10051 minnode = maxnode = value;
10052 else if (tree_int_cst_lt (maxnode, value))
10054 else if (tree_int_cst_lt (value, minnode))
10061 If the enumerator-list is empty, the underlying type is as if
10062 the enumeration had a single enumerator with value 0. */
10063 minnode = maxnode = integer_zero_node;
10065 /* Compute the number of bits require to represent all values of the
10066 enumeration. We must do this before the type of MINNODE and
10067 MAXNODE are transformed, since min_precision relies on the
10068 TREE_TYPE of the value it is passed. */
10069 unsignedp = tree_int_cst_sgn (minnode) >= 0;
10070 lowprec = min_precision (minnode, unsignedp);
10071 highprec = min_precision (maxnode, unsignedp);
10072 precision = MAX (lowprec, highprec);
10074 /* Determine the underlying type of the enumeration.
10078 The underlying type of an enumeration is an integral type that
10079 can represent all the enumerator values defined in the
10080 enumeration. It is implementation-defined which integral type is
10081 used as the underlying type for an enumeration except that the
10082 underlying type shall not be larger than int unless the value of
10083 an enumerator cannot fit in an int or unsigned int.
10085 We use "int" or an "unsigned int" as the underlying type, even if
10086 a smaller integral type would work, unless the user has
10087 explicitly requested that we use the smallest possible type. The
10088 user can request that for all enumerations with a command line
10089 flag, or for just one enumeration with an attribute. */
10091 use_short_enum = flag_short_enums
10092 || lookup_attribute ("packed", TYPE_ATTRIBUTES (enumtype));
10094 for (itk = (use_short_enum ? itk_char : itk_int);
10098 underlying_type = integer_types[itk];
10099 if (TYPE_PRECISION (underlying_type) >= precision
10100 && TYPE_UNSIGNED (underlying_type) == unsignedp)
10103 if (itk == itk_none)
10107 IF no integral type can represent all the enumerator values, the
10108 enumeration is ill-formed. */
10109 error ("no integral type can represent all of the enumerator values "
10110 "for %qT", enumtype);
10111 precision = TYPE_PRECISION (long_long_integer_type_node);
10112 underlying_type = integer_types[itk_unsigned_long_long];
10115 /* Compute the minium and maximum values for the type.
10119 For an enumeration where emin is the smallest enumerator and emax
10120 is the largest, the values of the enumeration are the values of the
10121 underlying type in the range bmin to bmax, where bmin and bmax are,
10122 respectively, the smallest and largest values of the smallest bit-
10123 field that can store emin and emax. */
10125 /* The middle-end currently assumes that types with TYPE_PRECISION
10126 narrower than their underlying type are suitably zero or sign
10127 extended to fill their mode. g++ doesn't make these guarantees.
10128 Until the middle-end can represent such paradoxical types, we
10129 set the TYPE_PRECISION to the width of the underlying type. */
10130 TYPE_PRECISION (enumtype) = TYPE_PRECISION (underlying_type);
10132 set_min_and_max_values_for_integral_type (enumtype, precision, unsignedp);
10136 The value of sizeof() applied to an enumeration type, an object
10137 of an enumeration type, or an enumerator, is the value of sizeof()
10138 applied to the underlying type. */
10139 TYPE_SIZE (enumtype) = TYPE_SIZE (underlying_type);
10140 TYPE_SIZE_UNIT (enumtype) = TYPE_SIZE_UNIT (underlying_type);
10141 TYPE_MODE (enumtype) = TYPE_MODE (underlying_type);
10142 TYPE_ALIGN (enumtype) = TYPE_ALIGN (underlying_type);
10143 TYPE_USER_ALIGN (enumtype) = TYPE_USER_ALIGN (underlying_type);
10144 TYPE_UNSIGNED (enumtype) = TYPE_UNSIGNED (underlying_type);
10146 /* Convert each of the enumerators to the type of the underlying
10147 type of the enumeration. */
10148 for (values = TYPE_VALUES (enumtype); values; values = TREE_CHAIN (values))
10150 location_t saved_location;
10152 decl = TREE_VALUE (values);
10153 saved_location = input_location;
10154 input_location = DECL_SOURCE_LOCATION (decl);
10155 value = perform_implicit_conversion (underlying_type,
10156 DECL_INITIAL (decl));
10157 input_location = saved_location;
10159 /* Do not clobber shared ints. */
10160 value = copy_node (value);
10162 TREE_TYPE (value) = enumtype;
10163 DECL_INITIAL (decl) = value;
10164 TREE_VALUE (values) = value;
10167 /* Fix up all variant types of this enum type. */
10168 for (t = TYPE_MAIN_VARIANT (enumtype); t; t = TYPE_NEXT_VARIANT (t))
10170 TYPE_VALUES (t) = TYPE_VALUES (enumtype);
10171 TYPE_MIN_VALUE (t) = TYPE_MIN_VALUE (enumtype);
10172 TYPE_MAX_VALUE (t) = TYPE_MAX_VALUE (enumtype);
10173 TYPE_SIZE (t) = TYPE_SIZE (enumtype);
10174 TYPE_SIZE_UNIT (t) = TYPE_SIZE_UNIT (enumtype);
10175 TYPE_MODE (t) = TYPE_MODE (enumtype);
10176 TYPE_PRECISION (t) = TYPE_PRECISION (enumtype);
10177 TYPE_ALIGN (t) = TYPE_ALIGN (enumtype);
10178 TYPE_USER_ALIGN (t) = TYPE_USER_ALIGN (enumtype);
10179 TYPE_UNSIGNED (t) = TYPE_UNSIGNED (enumtype);
10182 /* Finish debugging output for this type. */
10183 rest_of_type_compilation (enumtype, namespace_bindings_p ());
10186 /* Build and install a CONST_DECL for an enumeration constant of the
10187 enumeration type ENUMTYPE whose NAME and VALUE (if any) are provided.
10188 Assignment of sequential values by default is handled here. */
10191 build_enumerator (tree name, tree value, tree enumtype)
10197 /* If the VALUE was erroneous, pretend it wasn't there; that will
10198 result in the enum being assigned the next value in sequence. */
10199 if (value == error_mark_node)
10202 /* Remove no-op casts from the value. */
10204 STRIP_TYPE_NOPS (value);
10206 if (! processing_template_decl)
10208 /* Validate and default VALUE. */
10209 if (value != NULL_TREE)
10211 value = integral_constant_value (value);
10213 if (TREE_CODE (value) == INTEGER_CST)
10215 value = perform_integral_promotions (value);
10216 constant_expression_warning (value);
10220 error ("enumerator value for %qD not integer constant", name);
10225 /* Default based on previous value. */
10226 if (value == NULL_TREE)
10228 if (TYPE_VALUES (enumtype))
10231 unsigned HOST_WIDE_INT lo;
10235 /* The next value is the previous value plus one. We can
10236 safely assume that the previous value is an INTEGER_CST.
10237 add_double doesn't know the type of the target expression,
10238 so we must check with int_fits_type_p as well. */
10239 prev_value = DECL_INITIAL (TREE_VALUE (TYPE_VALUES (enumtype)));
10240 overflowed = add_double (TREE_INT_CST_LOW (prev_value),
10241 TREE_INT_CST_HIGH (prev_value),
10243 value = build_int_cst_wide (TREE_TYPE (prev_value), lo, hi);
10244 overflowed |= !int_fits_type_p (value, TREE_TYPE (prev_value));
10248 error ("overflow in enumeration values at %qD", name);
10249 value = error_mark_node;
10253 value = integer_zero_node;
10256 /* Remove no-op casts from the value. */
10257 STRIP_TYPE_NOPS (value);
10260 /* C++ associates enums with global, function, or class declarations. */
10261 context = current_scope ();
10263 /* Build the actual enumeration constant. Note that the enumeration
10264 constants have the type of their initializers until the
10265 enumeration is complete:
10269 Following the closing brace of an enum-specifier, each enumer-
10270 ator has the type of its enumeration. Prior to the closing
10271 brace, the type of each enumerator is the type of its
10272 initializing value.
10274 In finish_enum we will reset the type. Of course, if we're
10275 processing a template, there may be no value. */
10276 type = value ? TREE_TYPE (value) : NULL_TREE;
10278 if (context && context == current_class_type)
10279 /* This enum declaration is local to the class. We need the full
10280 lang_decl so that we can record DECL_CLASS_CONTEXT, for example. */
10281 decl = build_lang_decl (CONST_DECL, name, type);
10283 /* It's a global enum, or it's local to a function. (Note local to
10284 a function could mean local to a class method. */
10285 decl = build_decl (CONST_DECL, name, type);
10287 DECL_CONTEXT (decl) = FROB_CONTEXT (context);
10288 TREE_CONSTANT (decl) = 1;
10289 TREE_INVARIANT (decl) = 1;
10290 TREE_READONLY (decl) = 1;
10291 DECL_INITIAL (decl) = value;
10293 if (context && context == current_class_type)
10294 /* In something like `struct S { enum E { i = 7 }; };' we put `i'
10295 on the TYPE_FIELDS list for `S'. (That's so that you can say
10296 things like `S::i' later.) */
10297 finish_member_declaration (decl);
10301 /* Add this enumeration constant to the list for this type. */
10302 TYPE_VALUES (enumtype) = tree_cons (name, decl, TYPE_VALUES (enumtype));
10306 /* We're defining DECL. Make sure that it's type is OK. */
10309 check_function_type (tree decl, tree current_function_parms)
10311 tree fntype = TREE_TYPE (decl);
10312 tree return_type = complete_type (TREE_TYPE (fntype));
10314 /* In a function definition, arg types must be complete. */
10315 require_complete_types_for_parms (current_function_parms);
10317 if (dependent_type_p (return_type))
10319 if (!COMPLETE_OR_VOID_TYPE_P (return_type))
10321 tree args = TYPE_ARG_TYPES (fntype);
10323 error ("return type %q#T is incomplete", return_type);
10325 /* Make it return void instead. */
10326 if (TREE_CODE (fntype) == METHOD_TYPE)
10327 fntype = build_method_type_directly (TREE_TYPE (TREE_VALUE (args)),
10329 TREE_CHAIN (args));
10331 fntype = build_function_type (void_type_node, args);
10333 = build_exception_variant (fntype,
10334 TYPE_RAISES_EXCEPTIONS (TREE_TYPE (decl)));
10337 abstract_virtuals_error (decl, TREE_TYPE (fntype));
10340 /* Create the FUNCTION_DECL for a function definition.
10341 DECLSPECS and DECLARATOR are the parts of the declaration;
10342 they describe the function's name and the type it returns,
10343 but twisted together in a fashion that parallels the syntax of C.
10345 FLAGS is a bitwise or of SF_PRE_PARSED (indicating that the
10346 DECLARATOR is really the DECL for the function we are about to
10347 process and that DECLSPECS should be ignored), SF_INCLASS_INLINE
10348 indicating that the function is an inline defined in-class.
10350 This function creates a binding context for the function body
10351 as well as setting up the FUNCTION_DECL in current_function_decl.
10353 For C++, we must first check whether that datum makes any sense.
10354 For example, "class A local_a(1,2);" means that variable local_a
10355 is an aggregate of type A, which should have a constructor
10356 applied to it with the argument list [1, 2]. */
10359 start_preparsed_function (tree decl1, tree attrs, int flags)
10361 tree ctype = NULL_TREE;
10364 int doing_friend = 0;
10365 struct cp_binding_level *bl;
10366 tree current_function_parms;
10367 struct c_fileinfo *finfo
10368 = get_fileinfo (LOCATION_FILE (DECL_SOURCE_LOCATION (decl1)));
10369 bool honor_interface;
10371 /* Sanity check. */
10372 gcc_assert (TREE_CODE (TREE_VALUE (void_list_node)) == VOID_TYPE);
10373 gcc_assert (TREE_CHAIN (void_list_node) == NULL_TREE);
10375 fntype = TREE_TYPE (decl1);
10376 if (TREE_CODE (fntype) == METHOD_TYPE)
10377 ctype = TYPE_METHOD_BASETYPE (fntype);
10379 /* ISO C++ 11.4/5. A friend function defined in a class is in
10380 the (lexical) scope of the class in which it is defined. */
10381 if (!ctype && DECL_FRIEND_P (decl1))
10383 ctype = DECL_FRIEND_CONTEXT (decl1);
10385 /* CTYPE could be null here if we're dealing with a template;
10386 for example, `inline friend float foo()' inside a template
10387 will have no CTYPE set. */
10388 if (ctype && TREE_CODE (ctype) != RECORD_TYPE)
10394 if (DECL_DECLARED_INLINE_P (decl1)
10395 && lookup_attribute ("noinline", attrs))
10396 warning (0, "inline function %q+D given attribute noinline", decl1);
10398 if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (decl1))
10399 /* This is a constructor, we must ensure that any default args
10400 introduced by this definition are propagated to the clones
10401 now. The clones are used directly in overload resolution. */
10402 adjust_clone_args (decl1);
10404 /* Sometimes we don't notice that a function is a static member, and
10405 build a METHOD_TYPE for it. Fix that up now. */
10406 if (ctype != NULL_TREE && DECL_STATIC_FUNCTION_P (decl1)
10407 && TREE_CODE (TREE_TYPE (decl1)) == METHOD_TYPE)
10409 revert_static_member_fn (decl1);
10413 /* Set up current_class_type, and enter the scope of the class, if
10416 push_nested_class (ctype);
10417 else if (DECL_STATIC_FUNCTION_P (decl1))
10418 push_nested_class (DECL_CONTEXT (decl1));
10420 /* Now that we have entered the scope of the class, we must restore
10421 the bindings for any template parameters surrounding DECL1, if it
10422 is an inline member template. (Order is important; consider the
10423 case where a template parameter has the same name as a field of
10424 the class.) It is not until after this point that
10425 PROCESSING_TEMPLATE_DECL is guaranteed to be set up correctly. */
10426 if (flags & SF_INCLASS_INLINE)
10427 maybe_begin_member_template_processing (decl1);
10429 /* Effective C++ rule 15. */
10431 && DECL_OVERLOADED_OPERATOR_P (decl1) == NOP_EXPR
10432 && TREE_CODE (TREE_TYPE (fntype)) == VOID_TYPE)
10433 warning (OPT_Weffc__, "%<operator=%> should return a reference to %<*this%>");
10435 /* Make the init_value nonzero so pushdecl knows this is not tentative.
10436 error_mark_node is replaced below (in poplevel) with the BLOCK. */
10437 if (!DECL_INITIAL (decl1))
10438 DECL_INITIAL (decl1) = error_mark_node;
10440 /* This function exists in static storage.
10441 (This does not mean `static' in the C sense!) */
10442 TREE_STATIC (decl1) = 1;
10444 /* We must call push_template_decl after current_class_type is set
10445 up. (If we are processing inline definitions after exiting a
10446 class scope, current_class_type will be NULL_TREE until set above
10447 by push_nested_class.) */
10448 if (processing_template_decl)
10450 /* FIXME: Handle error_mark_node more gracefully. */
10451 tree newdecl1 = push_template_decl (decl1);
10452 if (newdecl1 != error_mark_node)
10456 /* We are now in the scope of the function being defined. */
10457 current_function_decl = decl1;
10459 /* Save the parm names or decls from this function's declarator
10460 where store_parm_decls will find them. */
10461 current_function_parms = DECL_ARGUMENTS (decl1);
10463 /* Make sure the parameter and return types are reasonable. When
10464 you declare a function, these types can be incomplete, but they
10465 must be complete when you define the function. */
10466 check_function_type (decl1, current_function_parms);
10468 /* Build the return declaration for the function. */
10469 restype = TREE_TYPE (fntype);
10470 /* Promote the value to int before returning it. */
10471 if (c_promoting_integer_type_p (restype))
10472 restype = type_promotes_to (restype);
10473 if (DECL_RESULT (decl1) == NULL_TREE)
10477 resdecl = build_decl (RESULT_DECL, 0, TYPE_MAIN_VARIANT (restype));
10478 DECL_ARTIFICIAL (resdecl) = 1;
10479 DECL_IGNORED_P (resdecl) = 1;
10480 DECL_RESULT (decl1) = resdecl;
10482 cp_apply_type_quals_to_decl (cp_type_quals (restype), resdecl);
10485 /* Initialize RTL machinery. We cannot do this until
10486 CURRENT_FUNCTION_DECL and DECL_RESULT are set up. We do this
10487 even when processing a template; this is how we get
10488 CFUN set up, and our per-function variables initialized.
10489 FIXME factor out the non-RTL stuff. */
10490 bl = current_binding_level;
10491 allocate_struct_function (decl1);
10492 current_binding_level = bl;
10494 /* Even though we're inside a function body, we still don't want to
10495 call expand_expr to calculate the size of a variable-sized array.
10496 We haven't necessarily assigned RTL to all variables yet, so it's
10497 not safe to try to expand expressions involving them. */
10498 cfun->x_dont_save_pending_sizes_p = 1;
10500 /* Start the statement-tree, start the tree now. */
10501 DECL_SAVED_TREE (decl1) = push_stmt_list ();
10503 /* Let the user know we're compiling this function. */
10504 announce_function (decl1);
10506 /* Record the decl so that the function name is defined.
10507 If we already have a decl for this name, and it is a FUNCTION_DECL,
10508 use the old decl. */
10509 if (!processing_template_decl && !(flags & SF_PRE_PARSED))
10511 /* A specialization is not used to guide overload resolution. */
10512 if (!DECL_FUNCTION_MEMBER_P (decl1)
10513 && !(DECL_USE_TEMPLATE (decl1) &&
10514 PRIMARY_TEMPLATE_P (DECL_TI_TEMPLATE (decl1))))
10516 tree olddecl = pushdecl (decl1);
10518 if (olddecl == error_mark_node)
10519 /* If something went wrong when registering the declaration,
10520 use DECL1; we have to have a FUNCTION_DECL to use when
10521 parsing the body of the function. */
10524 /* Otherwise, OLDDECL is either a previous declaration of
10525 the same function or DECL1 itself. */
10530 /* We need to set the DECL_CONTEXT. */
10531 if (!DECL_CONTEXT (decl1) && DECL_TEMPLATE_INFO (decl1))
10532 DECL_CONTEXT (decl1) = DECL_CONTEXT (DECL_TI_TEMPLATE (decl1));
10534 fntype = TREE_TYPE (decl1);
10536 /* If #pragma weak applies, mark the decl appropriately now.
10537 The pragma only applies to global functions. Because
10538 determining whether or not the #pragma applies involves
10539 computing the mangled name for the declaration, we cannot
10540 apply the pragma until after we have merged this declaration
10541 with any previous declarations; if the original declaration
10542 has a linkage specification, that specification applies to
10543 the definition as well, and may affect the mangled name. */
10544 if (!DECL_CONTEXT (decl1))
10545 maybe_apply_pragma_weak (decl1);
10548 /* Reset these in case the call to pushdecl changed them. */
10549 current_function_decl = decl1;
10550 cfun->decl = decl1;
10552 /* If we are (erroneously) defining a function that we have already
10553 defined before, wipe out what we knew before. */
10554 if (!DECL_PENDING_INLINE_P (decl1))
10555 DECL_SAVED_FUNCTION_DATA (decl1) = NULL;
10557 if (ctype && !doing_friend && !DECL_STATIC_FUNCTION_P (decl1))
10559 /* We know that this was set up by `grokclassfn'. We do not
10560 wait until `store_parm_decls', since evil parse errors may
10561 never get us to that point. Here we keep the consistency
10562 between `current_class_type' and `current_class_ptr'. */
10563 tree t = DECL_ARGUMENTS (decl1);
10565 gcc_assert (t != NULL_TREE && TREE_CODE (t) == PARM_DECL);
10566 gcc_assert (TREE_CODE (TREE_TYPE (t)) == POINTER_TYPE);
10568 cp_function_chain->x_current_class_ref
10569 = build_indirect_ref (t, NULL);
10570 cp_function_chain->x_current_class_ptr = t;
10572 /* Constructors and destructors need to know whether they're "in
10573 charge" of initializing virtual base classes. */
10574 t = TREE_CHAIN (t);
10575 if (DECL_HAS_IN_CHARGE_PARM_P (decl1))
10577 current_in_charge_parm = t;
10578 t = TREE_CHAIN (t);
10580 if (DECL_HAS_VTT_PARM_P (decl1))
10582 gcc_assert (DECL_NAME (t) == vtt_parm_identifier);
10583 current_vtt_parm = t;
10587 honor_interface = (!DECL_TEMPLATE_INSTANTIATION (decl1)
10588 /* Implicitly-defined methods (like the
10589 destructor for a class in which no destructor
10590 is explicitly declared) must not be defined
10591 until their definition is needed. So, we
10592 ignore interface specifications for
10593 compiler-generated functions. */
10594 && !DECL_ARTIFICIAL (decl1));
10596 if (DECL_INTERFACE_KNOWN (decl1))
10598 tree ctx = decl_function_context (decl1);
10600 if (DECL_NOT_REALLY_EXTERN (decl1))
10601 DECL_EXTERNAL (decl1) = 0;
10603 if (ctx != NULL_TREE && DECL_DECLARED_INLINE_P (ctx)
10604 && TREE_PUBLIC (ctx))
10605 /* This is a function in a local class in an extern inline
10607 comdat_linkage (decl1);
10609 /* If this function belongs to an interface, it is public.
10610 If it belongs to someone else's interface, it is also external.
10611 This only affects inlines and template instantiations. */
10612 else if (!finfo->interface_unknown && honor_interface)
10614 if (DECL_DECLARED_INLINE_P (decl1)
10615 || DECL_TEMPLATE_INSTANTIATION (decl1)
10616 || processing_template_decl)
10618 DECL_EXTERNAL (decl1)
10619 = (finfo->interface_only
10620 || (DECL_DECLARED_INLINE_P (decl1)
10621 && ! flag_implement_inlines
10622 && !DECL_VINDEX (decl1)));
10624 /* For WIN32 we also want to put these in linkonce sections. */
10625 maybe_make_one_only (decl1);
10628 DECL_EXTERNAL (decl1) = 0;
10629 DECL_INTERFACE_KNOWN (decl1) = 1;
10630 /* If this function is in an interface implemented in this file,
10631 make sure that the backend knows to emit this function
10633 if (!DECL_EXTERNAL (decl1))
10634 mark_needed (decl1);
10636 else if (finfo->interface_unknown && finfo->interface_only
10637 && honor_interface)
10639 /* If MULTIPLE_SYMBOL_SPACES is defined and we saw a #pragma
10640 interface, we will have both finfo->interface_unknown and
10641 finfo->interface_only set. In that case, we don't want to
10642 use the normal heuristics because someone will supply a
10643 #pragma implementation elsewhere, and deducing it here would
10644 produce a conflict. */
10645 comdat_linkage (decl1);
10646 DECL_EXTERNAL (decl1) = 0;
10647 DECL_INTERFACE_KNOWN (decl1) = 1;
10648 DECL_DEFER_OUTPUT (decl1) = 1;
10652 /* This is a definition, not a reference.
10653 So clear DECL_EXTERNAL. */
10654 DECL_EXTERNAL (decl1) = 0;
10656 if ((DECL_DECLARED_INLINE_P (decl1)
10657 || DECL_TEMPLATE_INSTANTIATION (decl1))
10658 && ! DECL_INTERFACE_KNOWN (decl1)
10659 /* Don't try to defer nested functions for now. */
10660 && ! decl_function_context (decl1))
10661 DECL_DEFER_OUTPUT (decl1) = 1;
10663 DECL_INTERFACE_KNOWN (decl1) = 1;
10666 /* Determine the ELF visibility attribute for the function. We must not
10667 do this before calling "pushdecl", as we must allow "duplicate_decls"
10668 to merge any attributes appropriately. We also need to wait until
10670 if (!DECL_CLONED_FUNCTION_P (decl1))
10671 determine_visibility (decl1);
10673 begin_scope (sk_function_parms, decl1);
10677 if (DECL_DESTRUCTOR_P (decl1)
10678 || (DECL_CONSTRUCTOR_P (decl1)
10679 && targetm.cxx.cdtor_returns_this ()))
10681 cdtor_label = build_decl (LABEL_DECL, NULL_TREE, NULL_TREE);
10682 DECL_CONTEXT (cdtor_label) = current_function_decl;
10685 start_fname_decls ();
10687 store_parm_decls (current_function_parms);
10691 /* Like start_preparsed_function, except that instead of a
10692 FUNCTION_DECL, this function takes DECLSPECS and DECLARATOR.
10694 Returns 1 on success. If the DECLARATOR is not suitable for a function
10695 (it defines a datum instead), we return 0, which tells
10696 yyparse to report a parse error. */
10699 start_function (cp_decl_specifier_seq *declspecs,
10700 const cp_declarator *declarator,
10705 decl1 = grokdeclarator (declarator, declspecs, FUNCDEF, 1, &attrs);
10706 /* If the declarator is not suitable for a function definition,
10707 cause a syntax error. */
10708 if (decl1 == NULL_TREE || TREE_CODE (decl1) != FUNCTION_DECL)
10711 if (DECL_MAIN_P (decl1))
10712 /* main must return int. grokfndecl should have corrected it
10713 (and issued a diagnostic) if the user got it wrong. */
10714 gcc_assert (same_type_p (TREE_TYPE (TREE_TYPE (decl1)),
10715 integer_type_node));
10717 start_preparsed_function (decl1, attrs, /*flags=*/SF_DEFAULT);
10722 /* Returns true iff an EH_SPEC_BLOCK should be created in the body of
10726 use_eh_spec_block (tree fn)
10728 return (flag_exceptions && flag_enforce_eh_specs
10729 && !processing_template_decl
10730 && TYPE_RAISES_EXCEPTIONS (TREE_TYPE (fn))
10731 /* We insert the EH_SPEC_BLOCK only in the original
10732 function; then, it is copied automatically to the
10734 && !DECL_CLONED_FUNCTION_P (fn)
10735 /* Implicitly-generated constructors and destructors have
10736 exception specifications. However, those specifications
10737 are the union of the possible exceptions specified by the
10738 constructors/destructors for bases and members, so no
10739 unallowed exception will ever reach this function. By
10740 not creating the EH_SPEC_BLOCK we save a little memory,
10741 and we avoid spurious warnings about unreachable
10743 && !DECL_ARTIFICIAL (fn));
10746 /* Store the parameter declarations into the current function declaration.
10747 This is called after parsing the parameter declarations, before
10748 digesting the body of the function.
10750 Also install to binding contour return value identifier, if any. */
10753 store_parm_decls (tree current_function_parms)
10755 tree fndecl = current_function_decl;
10758 /* This is a chain of any other decls that came in among the parm
10759 declarations. If a parm is declared with enum {foo, bar} x;
10760 then CONST_DECLs for foo and bar are put here. */
10761 tree nonparms = NULL_TREE;
10763 if (current_function_parms)
10765 /* This case is when the function was defined with an ANSI prototype.
10766 The parms already have decls, so we need not do anything here
10767 except record them as in effect
10768 and complain if any redundant old-style parm decls were written. */
10770 tree specparms = current_function_parms;
10773 /* Must clear this because it might contain TYPE_DECLs declared
10775 current_binding_level->names = NULL;
10777 /* If we're doing semantic analysis, then we'll call pushdecl
10778 for each of these. We must do them in reverse order so that
10779 they end in the correct forward order. */
10780 specparms = nreverse (specparms);
10782 for (parm = specparms; parm; parm = next)
10784 next = TREE_CHAIN (parm);
10785 if (TREE_CODE (parm) == PARM_DECL)
10787 if (DECL_NAME (parm) == NULL_TREE
10788 || TREE_CODE (parm) != VOID_TYPE)
10791 error ("parameter %qD declared void", parm);
10795 /* If we find an enum constant or a type tag,
10796 put it aside for the moment. */
10797 TREE_CHAIN (parm) = NULL_TREE;
10798 nonparms = chainon (nonparms, parm);
10802 /* Get the decls in their original chain order and record in the
10803 function. This is all and only the PARM_DECLs that were
10804 pushed into scope by the loop above. */
10805 DECL_ARGUMENTS (fndecl) = getdecls ();
10808 DECL_ARGUMENTS (fndecl) = NULL_TREE;
10810 /* Now store the final chain of decls for the arguments
10811 as the decl-chain of the current lexical scope.
10812 Put the enumerators in as well, at the front so that
10813 DECL_ARGUMENTS is not modified. */
10814 current_binding_level->names = chainon (nonparms, DECL_ARGUMENTS (fndecl));
10816 if (use_eh_spec_block (current_function_decl))
10817 current_eh_spec_block = begin_eh_spec_block ();
10821 /* We have finished doing semantic analysis on DECL, but have not yet
10822 generated RTL for its body. Save away our current state, so that
10823 when we want to generate RTL later we know what to do. */
10826 save_function_data (tree decl)
10828 struct language_function *f;
10830 /* Save the language-specific per-function data so that we can
10831 get it back when we really expand this function. */
10832 gcc_assert (!DECL_PENDING_INLINE_P (decl));
10835 f = GGC_NEW (struct language_function);
10836 memcpy (f, cp_function_chain, sizeof (struct language_function));
10837 DECL_SAVED_FUNCTION_DATA (decl) = f;
10839 /* Clear out the bits we don't need. */
10840 f->base.x_stmt_tree.x_cur_stmt_list = NULL_TREE;
10841 f->bindings = NULL;
10842 f->x_local_names = NULL;
10846 /* Set the return value of the constructor (if present). */
10849 finish_constructor_body (void)
10854 if (targetm.cxx.cdtor_returns_this ())
10856 /* Any return from a constructor will end up here. */
10857 add_stmt (build_stmt (LABEL_EXPR, cdtor_label));
10859 val = DECL_ARGUMENTS (current_function_decl);
10860 val = build2 (MODIFY_EXPR, TREE_TYPE (val),
10861 DECL_RESULT (current_function_decl), val);
10862 /* Return the address of the object. */
10863 exprstmt = build_stmt (RETURN_EXPR, val);
10864 add_stmt (exprstmt);
10868 /* Do all the processing for the beginning of a destructor; set up the
10869 vtable pointers and cleanups for bases and members. */
10872 begin_destructor_body (void)
10874 tree compound_stmt;
10876 /* If the CURRENT_CLASS_TYPE is incomplete, we will have already
10877 issued an error message. We still want to try to process the
10878 body of the function, but initialize_vtbl_ptrs will crash if
10879 TYPE_BINFO is NULL. */
10880 if (COMPLETE_TYPE_P (current_class_type))
10882 compound_stmt = begin_compound_stmt (0);
10883 /* Make all virtual function table pointers in non-virtual base
10884 classes point to CURRENT_CLASS_TYPE's virtual function
10886 initialize_vtbl_ptrs (current_class_ptr);
10887 finish_compound_stmt (compound_stmt);
10889 /* And insert cleanups for our bases and members so that they
10890 will be properly destroyed if we throw. */
10891 push_base_cleanups ();
10895 /* At the end of every destructor we generate code to delete the object if
10896 necessary. Do that now. */
10899 finish_destructor_body (void)
10903 /* Any return from a destructor will end up here; that way all base
10904 and member cleanups will be run when the function returns. */
10905 add_stmt (build_stmt (LABEL_EXPR, cdtor_label));
10907 /* In a virtual destructor, we must call delete. */
10908 if (DECL_VIRTUAL_P (current_function_decl))
10911 tree virtual_size = cxx_sizeof (current_class_type);
10915 At the point of definition of a virtual destructor (including
10916 an implicit definition), non-placement operator delete shall
10917 be looked up in the scope of the destructor's class and if
10918 found shall be accessible and unambiguous. */
10919 exprstmt = build_op_delete_call(DELETE_EXPR, current_class_ptr,
10921 /*global_p=*/false,
10922 /*placement=*/NULL_TREE,
10923 /*alloc_fn=*/NULL_TREE);
10925 if_stmt = begin_if_stmt ();
10926 finish_if_stmt_cond (build2 (BIT_AND_EXPR, integer_type_node,
10927 current_in_charge_parm,
10930 finish_expr_stmt (exprstmt);
10931 finish_then_clause (if_stmt);
10932 finish_if_stmt (if_stmt);
10935 if (targetm.cxx.cdtor_returns_this ())
10939 val = DECL_ARGUMENTS (current_function_decl);
10940 val = build2 (MODIFY_EXPR, TREE_TYPE (val),
10941 DECL_RESULT (current_function_decl), val);
10942 /* Return the address of the object. */
10943 exprstmt = build_stmt (RETURN_EXPR, val);
10944 add_stmt (exprstmt);
10948 /* Do the necessary processing for the beginning of a function body, which
10949 in this case includes member-initializers, but not the catch clauses of
10950 a function-try-block. Currently, this means opening a binding level
10951 for the member-initializers (in a ctor) and member cleanups (in a dtor). */
10954 begin_function_body (void)
10958 if (! FUNCTION_NEEDS_BODY_BLOCK (current_function_decl))
10961 if (processing_template_decl)
10962 /* Do nothing now. */;
10964 /* Always keep the BLOCK node associated with the outermost pair of
10965 curly braces of a function. These are needed for correct
10966 operation of dwarfout.c. */
10967 keep_next_level (true);
10969 stmt = begin_compound_stmt (BCS_FN_BODY);
10971 if (processing_template_decl)
10972 /* Do nothing now. */;
10973 else if (DECL_DESTRUCTOR_P (current_function_decl))
10974 begin_destructor_body ();
10979 /* Do the processing for the end of a function body. Currently, this means
10980 closing out the cleanups for fully-constructed bases and members, and in
10981 the case of the destructor, deleting the object if desired. Again, this
10982 is only meaningful for [cd]tors, since they are the only functions where
10983 there is a significant distinction between the main body and any
10984 function catch clauses. Handling, say, main() return semantics here
10985 would be wrong, as flowing off the end of a function catch clause for
10986 main() would also need to return 0. */
10989 finish_function_body (tree compstmt)
10991 if (compstmt == NULL_TREE)
10994 /* Close the block. */
10995 finish_compound_stmt (compstmt);
10997 if (processing_template_decl)
10998 /* Do nothing now. */;
10999 else if (DECL_CONSTRUCTOR_P (current_function_decl))
11000 finish_constructor_body ();
11001 else if (DECL_DESTRUCTOR_P (current_function_decl))
11002 finish_destructor_body ();
11005 /* Given a function, returns the BLOCK corresponding to the outermost level
11006 of curly braces, skipping the artificial block created for constructor
11010 outer_curly_brace_block (tree fndecl)
11012 tree block = BLOCK_SUBBLOCKS (DECL_INITIAL (fndecl));
11013 if (FUNCTION_NEEDS_BODY_BLOCK (current_function_decl))
11014 /* Skip the artificial function body block. */
11015 block = BLOCK_SUBBLOCKS (block);
11019 /* Finish up a function declaration and compile that function
11020 all the way to assembler language output. The free the storage
11021 for the function definition.
11023 FLAGS is a bitwise or of the following values:
11025 We just finished processing the body of an in-class inline
11026 function definition. (This processing will have taken place
11027 after the class definition is complete.) */
11030 finish_function (int flags)
11032 tree fndecl = current_function_decl;
11033 tree fntype, ctype = NULL_TREE;
11034 int inclass_inline = (flags & 2) != 0;
11037 /* When we get some parse errors, we can end up without a
11038 current_function_decl, so cope. */
11039 if (fndecl == NULL_TREE)
11040 return error_mark_node;
11042 if (DECL_NONSTATIC_MEMBER_FUNCTION_P (fndecl)
11043 && DECL_VIRTUAL_P (fndecl)
11044 && !processing_template_decl)
11046 tree fnclass = DECL_CONTEXT (fndecl);
11047 if (fndecl == CLASSTYPE_KEY_METHOD (fnclass))
11048 keyed_classes = tree_cons (NULL_TREE, fnclass, keyed_classes);
11051 nested = function_depth > 1;
11052 fntype = TREE_TYPE (fndecl);
11054 /* TREE_READONLY (fndecl) = 1;
11055 This caused &foo to be of type ptr-to-const-function
11056 which then got a warning when stored in a ptr-to-function variable. */
11058 gcc_assert (building_stmt_tree ());
11060 /* For a cloned function, we've already got all the code we need;
11061 there's no need to add any extra bits. */
11062 if (!DECL_CLONED_FUNCTION_P (fndecl))
11064 if (DECL_MAIN_P (current_function_decl))
11068 /* Make it so that `main' always returns 0 by default (or
11071 stmt = finish_return_stmt (integer_one_node);
11073 stmt = finish_return_stmt (integer_zero_node);
11075 /* Hack. We don't want the middle-end to warn that this
11076 return is unreachable, so put the statement on the
11078 #ifdef USE_MAPPED_LOCATION
11079 SET_EXPR_LOCATION (stmt, UNKNOWN_LOCATION);
11081 annotate_with_file_line (stmt, input_filename, 0);
11085 if (use_eh_spec_block (current_function_decl))
11086 finish_eh_spec_block (TYPE_RAISES_EXCEPTIONS
11087 (TREE_TYPE (current_function_decl)),
11088 current_eh_spec_block);
11091 /* If we're saving up tree structure, tie off the function now. */
11092 DECL_SAVED_TREE (fndecl) = pop_stmt_list (DECL_SAVED_TREE (fndecl));
11094 finish_fname_decls ();
11096 /* If this function can't throw any exceptions, remember that. */
11097 if (!processing_template_decl
11098 && !cp_function_chain->can_throw
11099 && !flag_non_call_exceptions)
11100 TREE_NOTHROW (fndecl) = 1;
11102 /* This must come after expand_function_end because cleanups might
11103 have declarations (from inline functions) that need to go into
11104 this function's blocks. */
11106 /* If the current binding level isn't the outermost binding level
11107 for this function, either there is a bug, or we have experienced
11108 syntax errors and the statement tree is malformed. */
11109 if (current_binding_level->kind != sk_function_parms)
11111 /* Make sure we have already experienced errors. */
11112 gcc_assert (errorcount);
11114 /* Throw away the broken statement tree and extra binding
11116 DECL_SAVED_TREE (fndecl) = alloc_stmt_list ();
11118 while (current_binding_level->kind != sk_function_parms)
11120 if (current_binding_level->kind == sk_class)
11121 pop_nested_class ();
11123 poplevel (0, 0, 0);
11126 poplevel (1, 0, 1);
11128 /* Statements should always be full-expressions at the outermost set
11129 of curly braces for a function. */
11130 gcc_assert (stmts_are_full_exprs_p ());
11132 /* Set up the named return value optimization, if we can. Candidate
11133 variables are selected in check_return_value. */
11134 if (current_function_return_value)
11136 tree r = current_function_return_value;
11139 if (r != error_mark_node
11140 /* This is only worth doing for fns that return in memory--and
11141 simpler, since we don't have to worry about promoted modes. */
11142 && aggregate_value_p (TREE_TYPE (TREE_TYPE (fndecl)), fndecl)
11143 /* Only allow this for variables declared in the outer scope of
11144 the function so we know that their lifetime always ends with a
11145 return; see g++.dg/opt/nrv6.C. We could be more flexible if
11146 we were to do this optimization in tree-ssa. */
11147 && (outer = outer_curly_brace_block (fndecl))
11148 && chain_member (r, BLOCK_VARS (outer)))
11149 finalize_nrv (&DECL_SAVED_TREE (fndecl), r, DECL_RESULT (fndecl));
11151 current_function_return_value = NULL_TREE;
11154 /* Remember that we were in class scope. */
11155 if (current_class_name)
11156 ctype = current_class_type;
11158 /* Must mark the RESULT_DECL as being in this function. */
11159 DECL_CONTEXT (DECL_RESULT (fndecl)) = fndecl;
11161 /* Set the BLOCK_SUPERCONTEXT of the outermost function scope to point
11162 to the FUNCTION_DECL node itself. */
11163 BLOCK_SUPERCONTEXT (DECL_INITIAL (fndecl)) = fndecl;
11165 /* Save away current state, if appropriate. */
11166 if (!processing_template_decl)
11167 save_function_data (fndecl);
11169 /* Complain if there's just no return statement. */
11170 if (warn_return_type
11171 && TREE_CODE (TREE_TYPE (fntype)) != VOID_TYPE
11172 && !dependent_type_p (TREE_TYPE (fntype))
11173 && !current_function_returns_value && !current_function_returns_null
11174 /* Don't complain if we abort or throw. */
11175 && !current_function_returns_abnormally
11176 && !DECL_NAME (DECL_RESULT (fndecl))
11177 /* Normally, with -Wreturn-type, flow will complain. Unless we're an
11178 inline function, as we might never be compiled separately. */
11179 && (DECL_INLINE (fndecl) || processing_template_decl)
11180 /* Structor return values (if any) are set by the compiler. */
11181 && !DECL_CONSTRUCTOR_P (fndecl)
11182 && !DECL_DESTRUCTOR_P (fndecl))
11183 warning (OPT_Wreturn_type, "no return statement in function returning non-void");
11185 /* Store the end of the function, so that we get good line number
11186 info for the epilogue. */
11187 cfun->function_end_locus = input_location;
11189 /* Genericize before inlining. */
11190 if (!processing_template_decl)
11192 struct language_function *f = DECL_SAVED_FUNCTION_DATA (fndecl);
11193 cp_genericize (fndecl);
11194 /* Clear out the bits we don't need. */
11195 f->x_current_class_ptr = NULL;
11196 f->x_current_class_ref = NULL;
11197 f->x_eh_spec_block = NULL;
11198 f->x_in_charge_parm = NULL;
11199 f->x_vtt_parm = NULL;
11200 f->x_return_value = NULL;
11201 f->bindings = NULL;
11202 f->extern_decl_map = NULL;
11204 /* Handle attribute((warn_unused_result)). Relies on gimple input. */
11205 c_warn_unused_result (&DECL_SAVED_TREE (fndecl));
11207 /* Clear out the bits we don't need. */
11208 local_names = NULL;
11210 /* We're leaving the context of this function, so zap cfun. It's still in
11211 DECL_STRUCT_FUNCTION, and we'll restore it in tree_rest_of_compilation. */
11213 current_function_decl = NULL;
11215 /* If this is an in-class inline definition, we may have to pop the
11216 bindings for the template parameters that we added in
11217 maybe_begin_member_template_processing when start_function was
11219 if (inclass_inline)
11220 maybe_end_member_template_processing ();
11222 /* Leave the scope of the class. */
11224 pop_nested_class ();
11230 /* Let the error reporting routines know that we're outside a
11231 function. For a nested function, this value is used in
11232 cxx_pop_function_context and then reset via pop_function_context. */
11233 current_function_decl = NULL_TREE;
11238 /* Create the FUNCTION_DECL for a function definition.
11239 DECLSPECS and DECLARATOR are the parts of the declaration;
11240 they describe the return type and the name of the function,
11241 but twisted together in a fashion that parallels the syntax of C.
11243 This function creates a binding context for the function body
11244 as well as setting up the FUNCTION_DECL in current_function_decl.
11246 Returns a FUNCTION_DECL on success.
11248 If the DECLARATOR is not suitable for a function (it defines a datum
11249 instead), we return 0, which tells yyparse to report a parse error.
11251 May return void_type_node indicating that this method is actually
11252 a friend. See grokfield for more details.
11254 Came here with a `.pushlevel' .
11256 DO NOT MAKE ANY CHANGES TO THIS CODE WITHOUT MAKING CORRESPONDING
11257 CHANGES TO CODE IN `grokfield'. */
11260 start_method (cp_decl_specifier_seq *declspecs,
11261 const cp_declarator *declarator, tree attrlist)
11263 tree fndecl = grokdeclarator (declarator, declspecs, MEMFUNCDEF, 0,
11266 if (fndecl == error_mark_node)
11267 return error_mark_node;
11269 if (fndecl == NULL || TREE_CODE (fndecl) != FUNCTION_DECL)
11271 error ("invalid member function declaration");
11272 return error_mark_node;
11276 cplus_decl_attributes (&fndecl, attrlist, 0);
11278 /* Pass friends other than inline friend functions back. */
11279 if (fndecl == void_type_node)
11282 if (DECL_IN_AGGR_P (fndecl))
11284 if (DECL_CONTEXT (fndecl)
11285 && TREE_CODE (DECL_CONTEXT (fndecl)) != NAMESPACE_DECL)
11286 error ("%qD is already defined in class %qT", fndecl,
11287 DECL_CONTEXT (fndecl));
11288 return error_mark_node;
11291 check_template_shadow (fndecl);
11293 DECL_DECLARED_INLINE_P (fndecl) = 1;
11294 if (flag_default_inline)
11295 DECL_INLINE (fndecl) = 1;
11297 /* We process method specializations in finish_struct_1. */
11298 if (processing_template_decl && !DECL_TEMPLATE_SPECIALIZATION (fndecl))
11300 fndecl = push_template_decl (fndecl);
11301 if (fndecl == error_mark_node)
11305 if (! DECL_FRIEND_P (fndecl))
11307 if (TREE_CHAIN (fndecl))
11309 fndecl = copy_node (fndecl);
11310 TREE_CHAIN (fndecl) = NULL_TREE;
11314 finish_decl (fndecl, NULL_TREE, NULL_TREE);
11316 /* Make a place for the parms. */
11317 begin_scope (sk_function_parms, fndecl);
11319 DECL_IN_AGGR_P (fndecl) = 1;
11323 /* Go through the motions of finishing a function definition.
11324 We don't compile this method until after the whole class has
11327 FINISH_METHOD must return something that looks as though it
11328 came from GROKFIELD (since we are defining a method, after all).
11330 This is called after parsing the body of the function definition.
11331 STMTS is the chain of statements that makes up the function body.
11333 DECL is the ..._DECL that `start_method' provided. */
11336 finish_method (tree decl)
11338 tree fndecl = decl;
11343 if (decl == void_type_node)
11346 old_initial = DECL_INITIAL (fndecl);
11348 /* Undo the level for the parms (from start_method).
11349 This is like poplevel, but it causes nothing to be
11350 saved. Saving information here confuses symbol-table
11351 output routines. Besides, this information will
11352 be correctly output when this method is actually
11355 /* Clear out the meanings of the local variables of this level;
11356 also record in each decl which block it belongs to. */
11358 for (link = current_binding_level->names; link; link = TREE_CHAIN (link))
11360 if (DECL_NAME (link) != NULL_TREE)
11361 pop_binding (DECL_NAME (link), link);
11362 gcc_assert (TREE_CODE (link) != FUNCTION_DECL);
11363 DECL_CONTEXT (link) = NULL_TREE;
11366 poplevel (0, 0, 0);
11368 DECL_INITIAL (fndecl) = old_initial;
11370 /* We used to check if the context of FNDECL was different from
11371 current_class_type as another way to get inside here. This didn't work
11372 for String.cc in libg++. */
11373 if (DECL_FRIEND_P (fndecl))
11375 VEC_safe_push (tree, gc, CLASSTYPE_INLINE_FRIENDS (current_class_type),
11377 decl = void_type_node;
11384 /* VAR is a VAR_DECL. If its type is incomplete, remember VAR so that
11385 we can lay it out later, when and if its type becomes complete. */
11388 maybe_register_incomplete_var (tree var)
11390 gcc_assert (TREE_CODE (var) == VAR_DECL);
11392 /* Keep track of variables with incomplete types. */
11393 if (!processing_template_decl && TREE_TYPE (var) != error_mark_node
11394 && DECL_EXTERNAL (var))
11396 tree inner_type = TREE_TYPE (var);
11398 while (TREE_CODE (inner_type) == ARRAY_TYPE)
11399 inner_type = TREE_TYPE (inner_type);
11400 inner_type = TYPE_MAIN_VARIANT (inner_type);
11402 if ((!COMPLETE_TYPE_P (inner_type) && CLASS_TYPE_P (inner_type))
11403 /* RTTI TD entries are created while defining the type_info. */
11404 || (TYPE_LANG_SPECIFIC (inner_type)
11405 && TYPE_BEING_DEFINED (inner_type)))
11406 incomplete_vars = tree_cons (inner_type, var, incomplete_vars);
11410 /* Called when a class type (given by TYPE) is defined. If there are
11411 any existing VAR_DECLs whose type hsa been completed by this
11412 declaration, update them now. */
11415 complete_vars (tree type)
11417 tree *list = &incomplete_vars;
11419 gcc_assert (CLASS_TYPE_P (type));
11422 if (same_type_p (type, TREE_PURPOSE (*list)))
11424 tree var = TREE_VALUE (*list);
11425 tree type = TREE_TYPE (var);
11426 /* Complete the type of the variable. The VAR_DECL itself
11427 will be laid out in expand_expr. */
11428 complete_type (type);
11429 cp_apply_type_quals_to_decl (cp_type_quals (type), var);
11430 /* Remove this entry from the list. */
11431 *list = TREE_CHAIN (*list);
11434 list = &TREE_CHAIN (*list);
11437 /* Check for pending declarations which may have abstract type. */
11438 complete_type_check_abstract (type);
11441 /* If DECL is of a type which needs a cleanup, build that cleanup
11445 cxx_maybe_build_cleanup (tree decl)
11447 tree type = TREE_TYPE (decl);
11449 if (type != error_mark_node && TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type))
11451 int flags = LOOKUP_NORMAL|LOOKUP_DESTRUCTOR;
11453 bool has_vbases = (TREE_CODE (type) == RECORD_TYPE
11454 && CLASSTYPE_VBASECLASSES (type));
11456 if (TREE_CODE (type) == ARRAY_TYPE)
11460 cxx_mark_addressable (decl);
11461 rval = build_unary_op (ADDR_EXPR, decl, 0);
11464 /* Optimize for space over speed here. */
11465 if (!has_vbases || flag_expensive_optimizations)
11466 flags |= LOOKUP_NONVIRTUAL;
11468 rval = build_delete (TREE_TYPE (rval), rval,
11469 sfk_complete_destructor, flags, 0);
11476 /* When a stmt has been parsed, this function is called. */
11483 /* DECL was originally constructed as a non-static member function,
11484 but turned out to be static. Update it accordingly. */
11487 revert_static_member_fn (tree decl)
11490 tree function = TREE_TYPE (decl);
11491 tree args = TYPE_ARG_TYPES (function);
11493 if (cp_type_quals (TREE_TYPE (TREE_VALUE (args)))
11494 != TYPE_UNQUALIFIED)
11495 error ("static member function %q#D declared with type qualifiers", decl);
11497 args = TREE_CHAIN (args);
11498 tmp = build_function_type (TREE_TYPE (function), args);
11499 tmp = build_qualified_type (tmp, cp_type_quals (function));
11500 tmp = build_exception_variant (tmp,
11501 TYPE_RAISES_EXCEPTIONS (function));
11502 TREE_TYPE (decl) = tmp;
11503 if (DECL_ARGUMENTS (decl))
11504 DECL_ARGUMENTS (decl) = TREE_CHAIN (DECL_ARGUMENTS (decl));
11505 DECL_STATIC_FUNCTION_P (decl) = 1;
11508 /* Initialize the variables used during compilation of a C++
11512 cxx_push_function_context (struct function * f)
11514 struct language_function *p = GGC_CNEW (struct language_function);
11517 /* Whenever we start a new function, we destroy temporaries in the
11519 current_stmt_tree ()->stmts_are_full_exprs_p = 1;
11525 if (DECL_SAVED_FUNCTION_DATA (fn))
11527 /* If we already parsed this function, and we're just expanding it
11528 now, restore saved state. */
11529 *cp_function_chain = *DECL_SAVED_FUNCTION_DATA (fn);
11531 /* We don't need the saved data anymore. Unless this is an inline
11532 function; we need the named return value info for
11533 declare_return_variable. */
11534 if (! DECL_INLINE (fn))
11535 DECL_SAVED_FUNCTION_DATA (fn) = NULL;
11540 /* Free the language-specific parts of F, now that we've finished
11541 compiling the function. */
11544 cxx_pop_function_context (struct function * f)
11549 /* Return which tree structure is used by T, or TS_CP_GENERIC if T is
11550 one of the language-independent trees. */
11552 enum cp_tree_node_structure_enum
11553 cp_tree_node_structure (union lang_tree_node * t)
11555 switch (TREE_CODE (&t->generic))
11557 case DEFAULT_ARG: return TS_CP_DEFAULT_ARG;
11558 case IDENTIFIER_NODE: return TS_CP_IDENTIFIER;
11559 case OVERLOAD: return TS_CP_OVERLOAD;
11560 case TEMPLATE_PARM_INDEX: return TS_CP_TPI;
11561 case TINST_LEVEL: return TS_CP_TINST_LEVEL;
11562 case PTRMEM_CST: return TS_CP_PTRMEM;
11563 case BASELINK: return TS_CP_BASELINK;
11564 default: return TS_CP_GENERIC;
11568 /* Build the void_list_node (void_type_node having been created). */
11570 build_void_list_node (void)
11572 tree t = build_tree_list (NULL_TREE, void_type_node);
11577 cp_missing_noreturn_ok_p (tree decl)
11579 /* A missing noreturn is ok for the `main' function. */
11580 return DECL_MAIN_P (decl);
11583 /* Return the COMDAT group into which DECL should be placed. */
11586 cxx_comdat_group (tree decl)
11590 /* Virtual tables, construction virtual tables, and virtual table
11591 tables all go in a single COMDAT group, named after the primary
11593 if (TREE_CODE (decl) == VAR_DECL && DECL_VTABLE_OR_VTT_P (decl))
11594 name = DECL_ASSEMBLER_NAME (CLASSTYPE_VTABLES (DECL_CONTEXT (decl)));
11595 /* For all other DECLs, the COMDAT group is the mangled name of the
11596 declaration itself. */
11599 while (DECL_THUNK_P (decl))
11601 /* If TARGET_USE_LOCAL_THUNK_ALIAS_P, use_thunk puts the thunk
11602 into the same section as the target function. In that case
11603 we must return target's name. */
11604 tree target = THUNK_TARGET (decl);
11605 if (TARGET_USE_LOCAL_THUNK_ALIAS_P (target)
11606 && DECL_SECTION_NAME (target) != NULL
11607 && DECL_ONE_ONLY (target))
11612 name = DECL_ASSEMBLER_NAME (decl);
11615 return IDENTIFIER_POINTER (name);
11618 #include "gt-cp-decl.h"