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)
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 /* Lay the type out, unless already done. */
1695 if (! same_type_p (newtype, oldtype)
1696 && TREE_TYPE (newdecl) != error_mark_node
1697 && !(processing_template_decl && uses_template_parms (newdecl)))
1698 layout_type (TREE_TYPE (newdecl));
1700 if ((TREE_CODE (newdecl) == VAR_DECL
1701 || TREE_CODE (newdecl) == PARM_DECL
1702 || TREE_CODE (newdecl) == RESULT_DECL
1703 || TREE_CODE (newdecl) == FIELD_DECL
1704 || TREE_CODE (newdecl) == TYPE_DECL)
1705 && !(processing_template_decl && uses_template_parms (newdecl)))
1706 layout_decl (newdecl, 0);
1708 /* Merge the type qualifiers. */
1709 if (TREE_READONLY (newdecl))
1710 TREE_READONLY (olddecl) = 1;
1711 if (TREE_THIS_VOLATILE (newdecl))
1712 TREE_THIS_VOLATILE (olddecl) = 1;
1713 if (TREE_NOTHROW (newdecl))
1714 TREE_NOTHROW (olddecl) = 1;
1716 /* Merge deprecatedness. */
1717 if (TREE_DEPRECATED (newdecl))
1718 TREE_DEPRECATED (olddecl) = 1;
1720 /* Merge the initialization information. */
1721 if (DECL_INITIAL (newdecl) == NULL_TREE
1722 && DECL_INITIAL (olddecl) != NULL_TREE)
1724 DECL_INITIAL (newdecl) = DECL_INITIAL (olddecl);
1725 DECL_SOURCE_LOCATION (newdecl) = DECL_SOURCE_LOCATION (olddecl);
1726 if (CAN_HAVE_FULL_LANG_DECL_P (newdecl)
1727 && DECL_LANG_SPECIFIC (newdecl)
1728 && DECL_LANG_SPECIFIC (olddecl))
1730 DECL_SAVED_TREE (newdecl) = DECL_SAVED_TREE (olddecl);
1731 DECL_STRUCT_FUNCTION (newdecl) = DECL_STRUCT_FUNCTION (olddecl);
1735 /* Merge the section attribute.
1736 We want to issue an error if the sections conflict but that must be
1737 done later in decl_attributes since we are called before attributes
1739 if (DECL_SECTION_NAME (newdecl) == NULL_TREE)
1740 DECL_SECTION_NAME (newdecl) = DECL_SECTION_NAME (olddecl);
1742 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1744 DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (newdecl)
1745 |= DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (olddecl);
1746 DECL_NO_LIMIT_STACK (newdecl) |= DECL_NO_LIMIT_STACK (olddecl);
1747 TREE_THIS_VOLATILE (newdecl) |= TREE_THIS_VOLATILE (olddecl);
1748 TREE_READONLY (newdecl) |= TREE_READONLY (olddecl);
1749 TREE_NOTHROW (newdecl) |= TREE_NOTHROW (olddecl);
1750 DECL_IS_MALLOC (newdecl) |= DECL_IS_MALLOC (olddecl);
1751 DECL_IS_PURE (newdecl) |= DECL_IS_PURE (olddecl);
1752 /* Keep the old RTL. */
1753 COPY_DECL_RTL (olddecl, newdecl);
1755 else if (TREE_CODE (newdecl) == VAR_DECL
1756 && (DECL_SIZE (olddecl) || !DECL_SIZE (newdecl)))
1758 /* Keep the old RTL. We cannot keep the old RTL if the old
1759 declaration was for an incomplete object and the new
1760 declaration is not since many attributes of the RTL will
1762 COPY_DECL_RTL (olddecl, newdecl);
1765 /* If cannot merge, then use the new type and qualifiers,
1766 and don't preserve the old rtl. */
1769 /* Clean out any memory we had of the old declaration. */
1770 tree oldstatic = value_member (olddecl, static_aggregates);
1772 TREE_VALUE (oldstatic) = error_mark_node;
1774 TREE_TYPE (olddecl) = TREE_TYPE (newdecl);
1775 TREE_READONLY (olddecl) = TREE_READONLY (newdecl);
1776 TREE_THIS_VOLATILE (olddecl) = TREE_THIS_VOLATILE (newdecl);
1777 TREE_SIDE_EFFECTS (olddecl) = TREE_SIDE_EFFECTS (newdecl);
1780 /* Merge the storage class information. */
1781 merge_weak (newdecl, olddecl);
1783 DECL_ONE_ONLY (newdecl) |= DECL_ONE_ONLY (olddecl);
1784 DECL_DEFER_OUTPUT (newdecl) |= DECL_DEFER_OUTPUT (olddecl);
1785 TREE_PUBLIC (newdecl) = TREE_PUBLIC (olddecl);
1786 TREE_STATIC (olddecl) = TREE_STATIC (newdecl) |= TREE_STATIC (olddecl);
1787 if (! DECL_EXTERNAL (olddecl))
1788 DECL_EXTERNAL (newdecl) = 0;
1790 new_template = NULL_TREE;
1791 if (DECL_LANG_SPECIFIC (newdecl) && DECL_LANG_SPECIFIC (olddecl))
1793 DECL_INTERFACE_KNOWN (newdecl) |= DECL_INTERFACE_KNOWN (olddecl);
1794 DECL_NOT_REALLY_EXTERN (newdecl) |= DECL_NOT_REALLY_EXTERN (olddecl);
1795 DECL_COMDAT (newdecl) |= DECL_COMDAT (olddecl);
1796 DECL_TEMPLATE_INSTANTIATED (newdecl)
1797 |= DECL_TEMPLATE_INSTANTIATED (olddecl);
1799 /* If the OLDDECL is an instantiation and/or specialization,
1800 then the NEWDECL must be too. But, it may not yet be marked
1801 as such if the caller has created NEWDECL, but has not yet
1802 figured out that it is a redeclaration. */
1803 if (!DECL_USE_TEMPLATE (newdecl))
1804 DECL_USE_TEMPLATE (newdecl) = DECL_USE_TEMPLATE (olddecl);
1806 /* Don't really know how much of the language-specific
1807 values we should copy from old to new. */
1808 DECL_IN_AGGR_P (newdecl) = DECL_IN_AGGR_P (olddecl);
1809 DECL_LANG_SPECIFIC (newdecl)->decl_flags.u2 =
1810 DECL_LANG_SPECIFIC (olddecl)->decl_flags.u2;
1811 DECL_NONCONVERTING_P (newdecl) = DECL_NONCONVERTING_P (olddecl);
1812 DECL_REPO_AVAILABLE_P (newdecl) = DECL_REPO_AVAILABLE_P (olddecl);
1813 if (DECL_TEMPLATE_INFO (newdecl))
1814 new_template = DECL_TI_TEMPLATE (newdecl);
1815 DECL_TEMPLATE_INFO (newdecl) = DECL_TEMPLATE_INFO (olddecl);
1816 DECL_INITIALIZED_IN_CLASS_P (newdecl)
1817 |= DECL_INITIALIZED_IN_CLASS_P (olddecl);
1818 olddecl_friend = DECL_FRIEND_P (olddecl);
1819 hidden_friend = (DECL_ANTICIPATED (olddecl)
1820 && DECL_HIDDEN_FRIEND_P (olddecl)
1821 && newdecl_is_friend);
1823 /* Only functions have DECL_BEFRIENDING_CLASSES. */
1824 if (TREE_CODE (newdecl) == FUNCTION_DECL
1825 || DECL_FUNCTION_TEMPLATE_P (newdecl))
1827 DECL_BEFRIENDING_CLASSES (newdecl)
1828 = chainon (DECL_BEFRIENDING_CLASSES (newdecl),
1829 DECL_BEFRIENDING_CLASSES (olddecl));
1830 /* DECL_THUNKS is only valid for virtual functions,
1831 otherwise it is a DECL_FRIEND_CONTEXT. */
1832 if (DECL_VIRTUAL_P (newdecl))
1833 DECL_THUNKS (newdecl) = DECL_THUNKS (olddecl);
1837 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1839 if (DECL_TEMPLATE_INSTANTIATION (olddecl)
1840 && !DECL_TEMPLATE_INSTANTIATION (newdecl))
1842 /* If newdecl is not a specialization, then it is not a
1843 template-related function at all. And that means that we
1844 should have exited above, returning 0. */
1845 gcc_assert (DECL_TEMPLATE_SPECIALIZATION (newdecl));
1847 if (TREE_USED (olddecl))
1848 /* From [temp.expl.spec]:
1850 If a template, a member template or the member of a class
1851 template is explicitly specialized then that
1852 specialization shall be declared before the first use of
1853 that specialization that would cause an implicit
1854 instantiation to take place, in every translation unit in
1855 which such a use occurs. */
1856 error ("explicit specialization of %qD after first use",
1859 SET_DECL_TEMPLATE_SPECIALIZATION (olddecl);
1861 /* Don't propagate visibility from the template to the
1862 specialization here. We'll do that in determine_visibility if
1864 DECL_VISIBILITY_SPECIFIED (olddecl) = 0;
1866 /* [temp.expl.spec/14] We don't inline explicit specialization
1867 just because the primary template says so. */
1871 if (DECL_PENDING_INLINE_INFO (newdecl) == 0)
1872 DECL_PENDING_INLINE_INFO (newdecl) = DECL_PENDING_INLINE_INFO (olddecl);
1874 DECL_DECLARED_INLINE_P (newdecl) |= DECL_DECLARED_INLINE_P (olddecl);
1876 /* If either decl says `inline', this fn is inline, unless
1877 its definition was passed already. */
1878 if (DECL_INLINE (newdecl) && DECL_INITIAL (olddecl) == NULL_TREE)
1879 DECL_INLINE (olddecl) = 1;
1880 DECL_INLINE (newdecl) = DECL_INLINE (olddecl);
1882 DECL_UNINLINABLE (newdecl) = DECL_UNINLINABLE (olddecl)
1883 = (DECL_UNINLINABLE (newdecl) || DECL_UNINLINABLE (olddecl));
1886 /* Preserve abstractness on cloned [cd]tors. */
1887 DECL_ABSTRACT (newdecl) = DECL_ABSTRACT (olddecl);
1891 SET_DECL_LANGUAGE (olddecl, DECL_LANGUAGE (newdecl));
1892 COPY_DECL_ASSEMBLER_NAME (newdecl, olddecl);
1893 COPY_DECL_RTL (newdecl, olddecl);
1895 if (! types_match || new_defines_function)
1897 /* These need to be copied so that the names are available.
1898 Note that if the types do match, we'll preserve inline
1899 info and other bits, but if not, we won't. */
1900 DECL_ARGUMENTS (olddecl) = DECL_ARGUMENTS (newdecl);
1901 DECL_RESULT (olddecl) = DECL_RESULT (newdecl);
1903 if (new_defines_function)
1904 /* If defining a function declared with other language
1905 linkage, use the previously declared language linkage. */
1906 SET_DECL_LANGUAGE (newdecl, DECL_LANGUAGE (olddecl));
1907 else if (types_match)
1909 /* If redeclaring a builtin function, and not a definition,
1910 it stays built in. */
1911 if (DECL_BUILT_IN (olddecl))
1913 DECL_BUILT_IN_CLASS (newdecl) = DECL_BUILT_IN_CLASS (olddecl);
1914 DECL_FUNCTION_CODE (newdecl) = DECL_FUNCTION_CODE (olddecl);
1915 /* If we're keeping the built-in definition, keep the rtl,
1916 regardless of declaration matches. */
1917 COPY_DECL_RTL (olddecl, newdecl);
1920 DECL_RESULT (newdecl) = DECL_RESULT (olddecl);
1921 /* Don't clear out the arguments if we're redefining a function. */
1922 if (DECL_ARGUMENTS (olddecl))
1923 DECL_ARGUMENTS (newdecl) = DECL_ARGUMENTS (olddecl);
1926 else if (TREE_CODE (newdecl) == NAMESPACE_DECL)
1927 NAMESPACE_LEVEL (newdecl) = NAMESPACE_LEVEL (olddecl);
1929 /* Now preserve various other info from the definition. */
1930 TREE_ADDRESSABLE (newdecl) = TREE_ADDRESSABLE (olddecl);
1931 TREE_ASM_WRITTEN (newdecl) = TREE_ASM_WRITTEN (olddecl);
1932 DECL_COMMON (newdecl) = DECL_COMMON (olddecl);
1933 COPY_DECL_ASSEMBLER_NAME (olddecl, newdecl);
1935 /* Warn about conflicting visibility specifications. */
1936 if (DECL_VISIBILITY_SPECIFIED (olddecl)
1937 && DECL_VISIBILITY_SPECIFIED (newdecl)
1938 && DECL_VISIBILITY (newdecl) != DECL_VISIBILITY (olddecl))
1940 warning (OPT_Wattributes, "%q+D: visibility attribute ignored "
1941 "because it", newdecl);
1942 warning (OPT_Wattributes, "%Jconflicts with previous "
1943 "declaration here", olddecl);
1945 /* Choose the declaration which specified visibility. */
1946 if (DECL_VISIBILITY_SPECIFIED (olddecl))
1948 DECL_VISIBILITY (newdecl) = DECL_VISIBILITY (olddecl);
1949 DECL_VISIBILITY_SPECIFIED (newdecl) = 1;
1951 /* Init priority used to be merged from newdecl to olddecl by the memcpy,
1952 so keep this behavior. */
1953 if (TREE_CODE (newdecl) == VAR_DECL && DECL_HAS_INIT_PRIORITY_P (newdecl))
1955 SET_DECL_INIT_PRIORITY (olddecl, DECL_INIT_PRIORITY (newdecl));
1956 DECL_HAS_INIT_PRIORITY_P (olddecl) = 1;
1959 /* The DECL_LANG_SPECIFIC information in OLDDECL will be replaced
1960 with that from NEWDECL below. */
1961 if (DECL_LANG_SPECIFIC (olddecl))
1963 gcc_assert (DECL_LANG_SPECIFIC (olddecl)
1964 != DECL_LANG_SPECIFIC (newdecl));
1965 ggc_free (DECL_LANG_SPECIFIC (olddecl));
1968 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1972 function_size = sizeof (struct tree_decl_common);
1974 memcpy ((char *) olddecl + sizeof (struct tree_common),
1975 (char *) newdecl + sizeof (struct tree_common),
1976 function_size - sizeof (struct tree_common));
1978 memcpy ((char *) olddecl + sizeof (struct tree_decl_common),
1979 (char *) newdecl + sizeof (struct tree_decl_common),
1980 sizeof (struct tree_function_decl) - sizeof (struct tree_decl_common));
1982 /* If newdecl is a template instantiation, it is possible that
1983 the following sequence of events has occurred:
1985 o A friend function was declared in a class template. The
1986 class template was instantiated.
1988 o The instantiation of the friend declaration was
1989 recorded on the instantiation list, and is newdecl.
1991 o Later, however, instantiate_class_template called pushdecl
1992 on the newdecl to perform name injection. But, pushdecl in
1993 turn called duplicate_decls when it discovered that another
1994 declaration of a global function with the same name already
1997 o Here, in duplicate_decls, we decided to clobber newdecl.
1999 If we're going to do that, we'd better make sure that
2000 olddecl, and not newdecl, is on the list of
2001 instantiations so that if we try to do the instantiation
2002 again we won't get the clobbered declaration. */
2003 reregister_specialization (newdecl,
2009 size_t size = tree_code_size (TREE_CODE (olddecl));
2010 memcpy ((char *) olddecl + sizeof (struct tree_common),
2011 (char *) newdecl + sizeof (struct tree_common),
2012 sizeof (struct tree_decl_common) - sizeof (struct tree_common));
2013 switch (TREE_CODE (olddecl))
2023 memcpy ((char *) olddecl + sizeof (struct tree_decl_common),
2024 (char *) newdecl + sizeof (struct tree_decl_common),
2025 size - sizeof (struct tree_decl_common)
2026 + TREE_CODE_LENGTH (TREE_CODE (newdecl)) * sizeof (char *));
2030 memcpy ((char *) olddecl + sizeof (struct tree_decl_common),
2031 (char *) newdecl + sizeof (struct tree_decl_common),
2032 sizeof (struct tree_decl_non_common) - sizeof (struct tree_decl_common)
2033 + TREE_CODE_LENGTH (TREE_CODE (newdecl)) * sizeof (char *));
2037 DECL_UID (olddecl) = olddecl_uid;
2039 DECL_FRIEND_P (olddecl) = 1;
2042 DECL_ANTICIPATED (olddecl) = 1;
2043 DECL_HIDDEN_FRIEND_P (olddecl) = 1;
2046 /* NEWDECL contains the merged attribute lists.
2047 Update OLDDECL to be the same. */
2048 DECL_ATTRIBUTES (olddecl) = DECL_ATTRIBUTES (newdecl);
2050 /* If OLDDECL had its DECL_RTL instantiated, re-invoke make_decl_rtl
2051 so that encode_section_info has a chance to look at the new decl
2052 flags and attributes. */
2053 if (DECL_RTL_SET_P (olddecl)
2054 && (TREE_CODE (olddecl) == FUNCTION_DECL
2055 || (TREE_CODE (olddecl) == VAR_DECL
2056 && TREE_STATIC (olddecl))))
2057 make_decl_rtl (olddecl);
2059 /* The NEWDECL will no longer be needed. Because every out-of-class
2060 declaration of a member results in a call to duplicate_decls,
2061 freeing these nodes represents in a significant savings. */
2067 /* Return zero if the declaration NEWDECL is valid
2068 when the declaration OLDDECL (assumed to be for the same name)
2069 has already been seen.
2070 Otherwise return an error message format string with a %s
2071 where the identifier should go. */
2074 redeclaration_error_message (tree newdecl, tree olddecl)
2076 if (TREE_CODE (newdecl) == TYPE_DECL)
2078 /* Because C++ can put things into name space for free,
2079 constructs like "typedef struct foo { ... } foo"
2080 would look like an erroneous redeclaration. */
2081 if (same_type_p (TREE_TYPE (newdecl), TREE_TYPE (olddecl)))
2084 return "redefinition of %q#D";
2086 else if (TREE_CODE (newdecl) == FUNCTION_DECL)
2088 /* If this is a pure function, its olddecl will actually be
2089 the original initialization to `0' (which we force to call
2090 abort()). Don't complain about redefinition in this case. */
2091 if (DECL_LANG_SPECIFIC (olddecl) && DECL_PURE_VIRTUAL_P (olddecl)
2092 && DECL_INITIAL (olddecl) == NULL_TREE)
2095 /* If both functions come from different namespaces, this is not
2096 a redeclaration - this is a conflict with a used function. */
2097 if (DECL_NAMESPACE_SCOPE_P (olddecl)
2098 && DECL_CONTEXT (olddecl) != DECL_CONTEXT (newdecl)
2099 && ! decls_match (olddecl, newdecl))
2100 return "%qD conflicts with used function";
2102 /* We'll complain about linkage mismatches in
2103 warn_extern_redeclared_static. */
2105 /* Defining the same name twice is no good. */
2106 if (DECL_INITIAL (olddecl) != NULL_TREE
2107 && DECL_INITIAL (newdecl) != NULL_TREE)
2109 if (DECL_NAME (olddecl) == NULL_TREE)
2110 return "%q#D not declared in class";
2112 return "redefinition of %q#D";
2116 else if (TREE_CODE (newdecl) == TEMPLATE_DECL)
2120 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == TYPE_DECL)
2122 if (COMPLETE_TYPE_P (TREE_TYPE (newdecl))
2123 && COMPLETE_TYPE_P (TREE_TYPE (olddecl)))
2124 return "redefinition of %q#D";
2128 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) != FUNCTION_DECL
2129 || (DECL_TEMPLATE_RESULT (newdecl)
2130 == DECL_TEMPLATE_RESULT (olddecl)))
2133 nt = DECL_TEMPLATE_RESULT (newdecl);
2134 if (DECL_TEMPLATE_INFO (nt))
2135 nt = DECL_TEMPLATE_RESULT (template_for_substitution (nt));
2136 ot = DECL_TEMPLATE_RESULT (olddecl);
2137 if (DECL_TEMPLATE_INFO (ot))
2138 ot = DECL_TEMPLATE_RESULT (template_for_substitution (ot));
2139 if (DECL_INITIAL (nt) && DECL_INITIAL (ot))
2140 return "redefinition of %q#D";
2144 else if (TREE_CODE (newdecl) == VAR_DECL
2145 && DECL_THREAD_LOCAL_P (newdecl) != DECL_THREAD_LOCAL_P (olddecl)
2146 && (! DECL_LANG_SPECIFIC (olddecl)
2147 || ! CP_DECL_THREADPRIVATE_P (olddecl)
2148 || DECL_THREAD_LOCAL_P (newdecl)))
2150 /* Only variables can be thread-local, and all declarations must
2151 agree on this property. */
2152 if (DECL_THREAD_LOCAL_P (newdecl))
2153 return "thread-local declaration of %q#D follows "
2154 "non-thread-local declaration";
2156 return "non-thread-local declaration of %q#D follows "
2157 "thread-local declaration";
2159 else if (toplevel_bindings_p () || DECL_NAMESPACE_SCOPE_P (newdecl))
2161 /* Objects declared at top level: */
2162 /* If at least one is a reference, it's ok. */
2163 if (DECL_EXTERNAL (newdecl) || DECL_EXTERNAL (olddecl))
2165 /* Reject two definitions. */
2166 return "redefinition of %q#D";
2170 /* Objects declared with block scope: */
2171 /* Reject two definitions, and reject a definition
2172 together with an external reference. */
2173 if (!(DECL_EXTERNAL (newdecl) && DECL_EXTERNAL (olddecl)))
2174 return "redeclaration of %q#D";
2179 /* Hash and equality functions for the named_label table. */
2182 named_label_entry_hash (const void *data)
2184 const struct named_label_entry *ent = (const struct named_label_entry *) data;
2185 return DECL_UID (ent->label_decl);
2189 named_label_entry_eq (const void *a, const void *b)
2191 const struct named_label_entry *ent_a = (const struct named_label_entry *) a;
2192 const struct named_label_entry *ent_b = (const struct named_label_entry *) b;
2193 return ent_a->label_decl == ent_b->label_decl;
2196 /* Create a new label, named ID. */
2199 make_label_decl (tree id, int local_p)
2201 struct named_label_entry *ent;
2205 decl = build_decl (LABEL_DECL, id, void_type_node);
2207 DECL_CONTEXT (decl) = current_function_decl;
2208 DECL_MODE (decl) = VOIDmode;
2209 C_DECLARED_LABEL_FLAG (decl) = local_p;
2211 /* Say where one reference is to the label, for the sake of the
2212 error if it is not defined. */
2213 DECL_SOURCE_LOCATION (decl) = input_location;
2215 /* Record the fact that this identifier is bound to this label. */
2216 SET_IDENTIFIER_LABEL_VALUE (id, decl);
2218 /* Create the label htab for the function on demand. */
2220 named_labels = htab_create_ggc (13, named_label_entry_hash,
2221 named_label_entry_eq, NULL);
2223 /* Record this label on the list of labels used in this function.
2224 We do this before calling make_label_decl so that we get the
2225 IDENTIFIER_LABEL_VALUE before the new label is declared. */
2226 ent = GGC_CNEW (struct named_label_entry);
2227 ent->label_decl = decl;
2229 slot = htab_find_slot (named_labels, ent, INSERT);
2230 gcc_assert (*slot == NULL);
2236 /* Look for a label named ID in the current function. If one cannot
2237 be found, create one. (We keep track of used, but undefined,
2238 labels, and complain about them at the end of a function.) */
2241 lookup_label (tree id)
2245 timevar_push (TV_NAME_LOOKUP);
2246 /* You can't use labels at global scope. */
2247 if (current_function_decl == NULL_TREE)
2249 error ("label %qE referenced outside of any function", id);
2250 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, NULL_TREE);
2253 /* See if we've already got this label. */
2254 decl = IDENTIFIER_LABEL_VALUE (id);
2255 if (decl != NULL_TREE && DECL_CONTEXT (decl) == current_function_decl)
2256 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, decl);
2258 decl = make_label_decl (id, /*local_p=*/0);
2259 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, decl);
2262 /* Declare a local label named ID. */
2265 declare_local_label (tree id)
2269 /* Add a new entry to the SHADOWED_LABELS list so that when we leave
2270 this scope we can restore the old value of IDENTIFIER_TYPE_VALUE. */
2271 shadow = tree_cons (IDENTIFIER_LABEL_VALUE (id), NULL_TREE,
2272 current_binding_level->shadowed_labels);
2273 current_binding_level->shadowed_labels = shadow;
2275 decl = make_label_decl (id, /*local_p=*/1);
2276 TREE_VALUE (shadow) = decl;
2281 /* Returns nonzero if it is ill-formed to jump past the declaration of
2282 DECL. Returns 2 if it's also a real problem. */
2285 decl_jump_unsafe (tree decl)
2287 if (TREE_CODE (decl) != VAR_DECL || TREE_STATIC (decl)
2288 || TREE_TYPE (decl) == error_mark_node)
2291 if (TYPE_NEEDS_CONSTRUCTING (TREE_TYPE (decl))
2292 || DECL_NONTRIVIALLY_INITIALIZED_P (decl))
2295 if (pod_type_p (TREE_TYPE (decl)))
2298 /* The POD stuff is just pedantry; why should it matter if the class
2299 contains a field of pointer to member type? */
2303 /* A subroutine of check_previous_goto_1 to identify a branch to the user. */
2306 identify_goto (tree decl, const location_t *locus)
2309 pedwarn ("jump to label %qD", decl);
2311 pedwarn ("jump to case label");
2313 pedwarn ("%H from here", locus);
2316 /* Check that a single previously seen jump to a newly defined label
2317 is OK. DECL is the LABEL_DECL or 0; LEVEL is the binding_level for
2318 the jump context; NAMES are the names in scope in LEVEL at the jump
2319 context; LOCUS is the source position of the jump or 0. Returns
2320 true if all is well. */
2323 check_previous_goto_1 (tree decl, struct cp_binding_level* level, tree names,
2324 bool exited_omp, const location_t *locus)
2326 struct cp_binding_level *b;
2327 bool identified = false, saw_eh = false, saw_omp = false;
2331 identify_goto (decl, locus);
2332 error (" exits OpenMP structured block");
2333 identified = saw_omp = true;
2336 for (b = current_binding_level; b ; b = b->level_chain)
2338 tree new_decls, old_decls = (b == level ? names : NULL_TREE);
2340 for (new_decls = b->names; new_decls != old_decls;
2341 new_decls = TREE_CHAIN (new_decls))
2343 int problem = decl_jump_unsafe (new_decls);
2349 identify_goto (decl, locus);
2353 error (" crosses initialization of %q+#D", new_decls);
2355 pedwarn (" enters scope of non-POD %q+#D", new_decls);
2360 if ((b->kind == sk_try || b->kind == sk_catch) && !saw_eh)
2364 identify_goto (decl, locus);
2367 if (b->kind == sk_try)
2368 error (" enters try block");
2370 error (" enters catch block");
2373 if (b->kind == sk_omp && !saw_omp)
2377 identify_goto (decl, locus);
2380 error (" enters OpenMP structured block");
2389 check_previous_goto (tree decl, struct named_label_use_entry *use)
2391 check_previous_goto_1 (decl, use->binding_level,
2392 use->names_in_scope, use->in_omp_scope,
2393 &use->o_goto_locus);
2397 check_switch_goto (struct cp_binding_level* level)
2399 return check_previous_goto_1 (NULL_TREE, level, level->names, false, NULL);
2402 /* Check that a new jump to a label DECL is OK. Called by
2403 finish_goto_stmt. */
2406 check_goto (tree decl)
2408 struct named_label_entry *ent, dummy;
2409 bool saw_catch = false, identified = false;
2412 /* We can't know where a computed goto is jumping.
2413 So we assume that it's OK. */
2414 if (TREE_CODE (decl) != LABEL_DECL)
2417 /* We didn't record any information about this label when we created it,
2418 and there's not much point since it's trivial to analyze as a return. */
2419 if (decl == cdtor_label)
2422 dummy.label_decl = decl;
2423 ent = (struct named_label_entry *) htab_find (named_labels, &dummy);
2424 gcc_assert (ent != NULL);
2426 /* If the label hasn't been defined yet, defer checking. */
2427 if (! DECL_INITIAL (decl))
2429 struct named_label_use_entry *new_use;
2431 /* Don't bother creating another use if the last goto had the
2432 same data, and will therefore create the same set of errors. */
2434 && ent->uses->names_in_scope == current_binding_level->names)
2437 new_use = GGC_NEW (struct named_label_use_entry);
2438 new_use->binding_level = current_binding_level;
2439 new_use->names_in_scope = current_binding_level->names;
2440 new_use->o_goto_locus = input_location;
2441 new_use->in_omp_scope = false;
2443 new_use->next = ent->uses;
2444 ent->uses = new_use;
2448 if (ent->in_try_scope || ent->in_catch_scope
2449 || ent->in_omp_scope || ent->bad_decls)
2451 pedwarn ("jump to label %q+D", decl);
2452 pedwarn (" from here");
2456 for (bad = ent->bad_decls; bad; bad = TREE_CHAIN (bad))
2458 tree b = TREE_VALUE (bad);
2459 int u = decl_jump_unsafe (b);
2461 if (u > 1 && DECL_ARTIFICIAL (b))
2463 /* Can't skip init of __exception_info. */
2464 error ("%J enters catch block", b);
2468 error (" skips initialization of %q+#D", b);
2470 pedwarn (" enters scope of non-POD %q+#D", b);
2473 if (ent->in_try_scope)
2474 error (" enters try block");
2475 else if (ent->in_catch_scope && !saw_catch)
2476 error (" enters catch block");
2478 if (ent->in_omp_scope)
2479 error (" enters OpenMP structured block");
2480 else if (flag_openmp)
2482 struct cp_binding_level *b;
2483 for (b = current_binding_level; b ; b = b->level_chain)
2485 if (b == ent->binding_level)
2487 if (b->kind == sk_omp)
2491 pedwarn ("jump to label %q+D", decl);
2492 pedwarn (" from here");
2495 error (" exits OpenMP structured block");
2502 /* Check that a return is ok wrt OpenMP structured blocks.
2503 Called by finish_return_stmt. Returns true if all is well. */
2506 check_omp_return (void)
2508 struct cp_binding_level *b;
2509 for (b = current_binding_level; b ; b = b->level_chain)
2510 if (b->kind == sk_omp)
2512 error ("invalid exit from OpenMP structured block");
2518 /* Define a label, specifying the location in the source file.
2519 Return the LABEL_DECL node for the label. */
2522 define_label (location_t location, tree name)
2524 struct named_label_entry *ent, dummy;
2525 struct cp_binding_level *p;
2528 timevar_push (TV_NAME_LOOKUP);
2530 decl = lookup_label (name);
2532 dummy.label_decl = decl;
2533 ent = (struct named_label_entry *) htab_find (named_labels, &dummy);
2534 gcc_assert (ent != NULL);
2536 /* After labels, make any new cleanups in the function go into their
2537 own new (temporary) binding contour. */
2538 for (p = current_binding_level;
2539 p->kind != sk_function_parms;
2541 p->more_cleanups_ok = 0;
2543 if (name == get_identifier ("wchar_t"))
2544 pedwarn ("label named wchar_t");
2546 if (DECL_INITIAL (decl) != NULL_TREE)
2548 error ("duplicate label %qD", decl);
2549 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
2553 struct named_label_use_entry *use;
2555 /* Mark label as having been defined. */
2556 DECL_INITIAL (decl) = error_mark_node;
2557 /* Say where in the source. */
2558 DECL_SOURCE_LOCATION (decl) = location;
2560 ent->binding_level = current_binding_level;
2561 ent->names_in_scope = current_binding_level->names;
2563 for (use = ent->uses; use ; use = use->next)
2564 check_previous_goto (decl, use);
2568 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, decl);
2573 struct cp_binding_level *level;
2574 struct cp_switch *next;
2575 /* The SWITCH_STMT being built. */
2577 /* A splay-tree mapping the low element of a case range to the high
2578 element, or NULL_TREE if there is no high element. Used to
2579 determine whether or not a new case label duplicates an old case
2580 label. We need a tree, rather than simply a hash table, because
2581 of the GNU case range extension. */
2585 /* A stack of the currently active switch statements. The innermost
2586 switch statement is on the top of the stack. There is no need to
2587 mark the stack for garbage collection because it is only active
2588 during the processing of the body of a function, and we never
2589 collect at that point. */
2591 static struct cp_switch *switch_stack;
2593 /* Called right after a switch-statement condition is parsed.
2594 SWITCH_STMT is the switch statement being parsed. */
2597 push_switch (tree switch_stmt)
2599 struct cp_switch *p = XNEW (struct cp_switch);
2600 p->level = current_binding_level;
2601 p->next = switch_stack;
2602 p->switch_stmt = switch_stmt;
2603 p->cases = splay_tree_new (case_compare, NULL, NULL);
2610 struct cp_switch *cs = switch_stack;
2611 location_t switch_location;
2613 /* Emit warnings as needed. */
2614 if (EXPR_HAS_LOCATION (cs->switch_stmt))
2615 switch_location = EXPR_LOCATION (cs->switch_stmt);
2617 switch_location = input_location;
2618 if (!processing_template_decl)
2619 c_do_switch_warnings (cs->cases, switch_location,
2620 SWITCH_STMT_TYPE (cs->switch_stmt),
2621 SWITCH_STMT_COND (cs->switch_stmt));
2623 splay_tree_delete (cs->cases);
2624 switch_stack = switch_stack->next;
2628 /* Note that we've seen a definition of a case label, and complain if this
2629 is a bad place for one. */
2632 finish_case_label (tree low_value, tree high_value)
2635 struct cp_binding_level *p;
2637 if (processing_template_decl)
2641 /* For templates, just add the case label; we'll do semantic
2642 analysis at instantiation-time. */
2643 label = build_decl (LABEL_DECL, NULL_TREE, NULL_TREE);
2644 return add_stmt (build_case_label (low_value, high_value, label));
2647 /* Find the condition on which this switch statement depends. */
2648 cond = SWITCH_STMT_COND (switch_stack->switch_stmt);
2649 if (cond && TREE_CODE (cond) == TREE_LIST)
2650 cond = TREE_VALUE (cond);
2652 if (!check_switch_goto (switch_stack->level))
2653 return error_mark_node;
2655 r = c_add_case_label (switch_stack->cases, cond, TREE_TYPE (cond),
2656 low_value, high_value);
2658 /* After labels, make any new cleanups in the function go into their
2659 own new (temporary) binding contour. */
2660 for (p = current_binding_level;
2661 p->kind != sk_function_parms;
2663 p->more_cleanups_ok = 0;
2668 /* Hash a TYPENAME_TYPE. K is really of type `tree'. */
2671 typename_hash (const void* k)
2676 hash = (htab_hash_pointer (TYPE_CONTEXT (t))
2677 ^ htab_hash_pointer (DECL_NAME (TYPE_NAME (t))));
2682 typedef struct typename_info {
2690 /* Compare two TYPENAME_TYPEs. K1 and K2 are really of type `tree'. */
2693 typename_compare (const void * k1, const void * k2)
2696 const typename_info *t2;
2699 t2 = (const typename_info *) k2;
2701 return (DECL_NAME (TYPE_NAME (t1)) == t2->name
2702 && TYPE_CONTEXT (t1) == t2->scope
2703 && TYPENAME_TYPE_FULLNAME (t1) == t2->template_id
2704 && TYPENAME_IS_ENUM_P (t1) == t2->enum_p
2705 && TYPENAME_IS_CLASS_P (t1) == t2->class_p);
2708 /* Build a TYPENAME_TYPE. If the type is `typename T::t', CONTEXT is
2709 the type of `T', NAME is the IDENTIFIER_NODE for `t'.
2711 Returns the new TYPENAME_TYPE. */
2713 static GTY ((param_is (union tree_node))) htab_t typename_htab;
2716 build_typename_type (tree context, tree name, tree fullname,
2717 enum tag_types tag_type)
2725 if (typename_htab == NULL)
2726 typename_htab = htab_create_ggc (61, &typename_hash,
2727 &typename_compare, NULL);
2729 ti.scope = FROB_CONTEXT (context);
2731 ti.template_id = fullname;
2732 ti.enum_p = tag_type == enum_type;
2733 ti.class_p = (tag_type == class_type
2734 || tag_type == record_type
2735 || tag_type == union_type);
2736 hash = (htab_hash_pointer (ti.scope)
2737 ^ htab_hash_pointer (ti.name));
2739 /* See if we already have this type. */
2740 e = htab_find_slot_with_hash (typename_htab, &ti, hash, INSERT);
2745 /* Build the TYPENAME_TYPE. */
2746 t = make_aggr_type (TYPENAME_TYPE);
2747 TYPE_CONTEXT (t) = ti.scope;
2748 TYPENAME_TYPE_FULLNAME (t) = ti.template_id;
2749 TYPENAME_IS_ENUM_P (t) = ti.enum_p;
2750 TYPENAME_IS_CLASS_P (t) = ti.class_p;
2752 /* Build the corresponding TYPE_DECL. */
2753 d = build_decl (TYPE_DECL, name, t);
2754 TYPE_NAME (TREE_TYPE (d)) = d;
2755 TYPE_STUB_DECL (TREE_TYPE (d)) = d;
2756 DECL_CONTEXT (d) = FROB_CONTEXT (context);
2757 DECL_ARTIFICIAL (d) = 1;
2759 /* Store it in the hash table. */
2766 /* Resolve `typename CONTEXT::NAME'. TAG_TYPE indicates the tag
2767 provided to name the type. Returns an appropriate type, unless an
2768 error occurs, in which case error_mark_node is returned. If we
2769 locate a non-artificial TYPE_DECL and TF_KEEP_TYPE_DECL is set, we
2770 return that, rather than the _TYPE it corresponds to, in other
2771 cases we look through the type decl. If TF_ERROR is set, complain
2772 about errors, otherwise be quiet. */
2775 make_typename_type (tree context, tree name, enum tag_types tag_type,
2776 tsubst_flags_t complain)
2780 if (name == error_mark_node
2781 || context == NULL_TREE
2782 || context == error_mark_node)
2783 return error_mark_node;
2787 if (!(TYPE_LANG_SPECIFIC (name)
2788 && (CLASSTYPE_IS_TEMPLATE (name)
2789 || CLASSTYPE_USE_TEMPLATE (name))))
2790 name = TYPE_IDENTIFIER (name);
2792 /* Create a TEMPLATE_ID_EXPR for the type. */
2793 name = build_nt (TEMPLATE_ID_EXPR,
2794 CLASSTYPE_TI_TEMPLATE (name),
2795 CLASSTYPE_TI_ARGS (name));
2797 else if (TREE_CODE (name) == TYPE_DECL)
2798 name = DECL_NAME (name);
2802 if (TREE_CODE (name) == TEMPLATE_ID_EXPR)
2804 name = TREE_OPERAND (name, 0);
2805 if (TREE_CODE (name) == TEMPLATE_DECL)
2806 name = TREE_OPERAND (fullname, 0) = DECL_NAME (name);
2808 if (TREE_CODE (name) == TEMPLATE_DECL)
2810 error ("%qD used without template parameters", name);
2811 return error_mark_node;
2813 gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE);
2814 gcc_assert (TYPE_P (context));
2816 if (!dependent_type_p (context)
2817 || currently_open_class (context))
2819 if (TREE_CODE (fullname) == TEMPLATE_ID_EXPR)
2821 tree tmpl = NULL_TREE;
2822 if (IS_AGGR_TYPE (context))
2823 tmpl = lookup_field (context, name, 0, false);
2824 if (!tmpl || !DECL_CLASS_TEMPLATE_P (tmpl))
2826 if (complain & tf_error)
2827 error ("no class template named %q#T in %q#T",
2829 return error_mark_node;
2832 if (complain & tf_error)
2833 perform_or_defer_access_check (TYPE_BINFO (context), tmpl);
2835 return lookup_template_class (tmpl,
2836 TREE_OPERAND (fullname, 1),
2838 /*entering_scope=*/0,
2839 tf_warning_or_error | tf_user);
2845 if (!IS_AGGR_TYPE (context))
2847 if (complain & tf_error)
2848 error ("no type named %q#T in %q#T", name, context);
2849 return error_mark_node;
2852 t = lookup_field (context, name, 0, true);
2855 if (TREE_CODE (t) != TYPE_DECL)
2857 if (complain & tf_error)
2858 error ("no type named %q#T in %q#T", name, context);
2859 return error_mark_node;
2862 if (complain & tf_error)
2863 perform_or_defer_access_check (TYPE_BINFO (context), t);
2865 if (DECL_ARTIFICIAL (t) || !(complain & tf_keep_type_decl))
2873 /* If the CONTEXT is not a template type, then either the field is
2874 there now or its never going to be. */
2875 if (!dependent_type_p (context))
2877 if (complain & tf_error)
2878 error ("no type named %q#T in %q#T", name, context);
2879 return error_mark_node;
2882 return build_typename_type (context, name, fullname, tag_type);
2885 /* Resolve `CONTEXT::template NAME'. Returns a TEMPLATE_DECL if the name
2886 can be resolved or an UNBOUND_CLASS_TEMPLATE, unless an error occurs,
2887 in which case error_mark_node is returned.
2889 If PARM_LIST is non-NULL, also make sure that the template parameter
2890 list of TEMPLATE_DECL matches.
2892 If COMPLAIN zero, don't complain about any errors that occur. */
2895 make_unbound_class_template (tree context, tree name, tree parm_list,
2896 tsubst_flags_t complain)
2902 name = TYPE_IDENTIFIER (name);
2903 else if (DECL_P (name))
2904 name = DECL_NAME (name);
2905 gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE);
2907 if (!dependent_type_p (context)
2908 || currently_open_class (context))
2910 tree tmpl = NULL_TREE;
2912 if (IS_AGGR_TYPE (context))
2913 tmpl = lookup_field (context, name, 0, false);
2915 if (!tmpl || !DECL_CLASS_TEMPLATE_P (tmpl))
2917 if (complain & tf_error)
2918 error ("no class template named %q#T in %q#T", name, context);
2919 return error_mark_node;
2923 && !comp_template_parms (DECL_TEMPLATE_PARMS (tmpl), parm_list))
2925 if (complain & tf_error)
2927 error ("template parameters do not match template");
2928 error ("%q+D declared here", tmpl);
2930 return error_mark_node;
2933 if (complain & tf_error)
2934 perform_or_defer_access_check (TYPE_BINFO (context), tmpl);
2939 /* Build the UNBOUND_CLASS_TEMPLATE. */
2940 t = make_aggr_type (UNBOUND_CLASS_TEMPLATE);
2941 TYPE_CONTEXT (t) = FROB_CONTEXT (context);
2942 TREE_TYPE (t) = NULL_TREE;
2944 /* Build the corresponding TEMPLATE_DECL. */
2945 d = build_decl (TEMPLATE_DECL, name, t);
2946 TYPE_NAME (TREE_TYPE (d)) = d;
2947 TYPE_STUB_DECL (TREE_TYPE (d)) = d;
2948 DECL_CONTEXT (d) = FROB_CONTEXT (context);
2949 DECL_ARTIFICIAL (d) = 1;
2950 DECL_TEMPLATE_PARMS (d) = parm_list;
2957 /* Push the declarations of builtin types into the namespace.
2958 RID_INDEX is the index of the builtin type in the array
2959 RID_POINTERS. NAME is the name used when looking up the builtin
2960 type. TYPE is the _TYPE node for the builtin type. */
2963 record_builtin_type (enum rid rid_index,
2967 tree rname = NULL_TREE, tname = NULL_TREE;
2968 tree tdecl = NULL_TREE;
2970 if ((int) rid_index < (int) RID_MAX)
2971 rname = ridpointers[(int) rid_index];
2973 tname = get_identifier (name);
2975 /* The calls to SET_IDENTIFIER_GLOBAL_VALUE below should be
2976 eliminated. Built-in types should not be looked up name; their
2977 names are keywords that the parser can recognize. However, there
2978 is code in c-common.c that uses identifier_global_value to look
2979 up built-in types by name. */
2982 tdecl = build_decl (TYPE_DECL, tname, type);
2983 DECL_ARTIFICIAL (tdecl) = 1;
2984 SET_IDENTIFIER_GLOBAL_VALUE (tname, tdecl);
2990 tdecl = build_decl (TYPE_DECL, rname, type);
2991 DECL_ARTIFICIAL (tdecl) = 1;
2993 SET_IDENTIFIER_GLOBAL_VALUE (rname, tdecl);
2996 if (!TYPE_NAME (type))
2997 TYPE_NAME (type) = tdecl;
3000 debug_hooks->type_decl (tdecl, 0);
3003 /* Record one of the standard Java types.
3004 * Declare it as having the given NAME.
3005 * If SIZE > 0, it is the size of one of the integral types;
3006 * otherwise it is the negative of the size of one of the other types. */
3009 record_builtin_java_type (const char* name, int size)
3013 type = make_signed_type (size);
3014 else if (size > -32)
3015 { /* "__java_char" or ""__java_boolean". */
3016 type = make_unsigned_type (-size);
3017 /*if (size == -1) TREE_SET_CODE (type, BOOLEAN_TYPE);*/
3020 { /* "__java_float" or ""__java_double". */
3021 type = make_node (REAL_TYPE);
3022 TYPE_PRECISION (type) = - size;
3025 record_builtin_type (RID_MAX, name, type);
3026 decl = TYPE_NAME (type);
3028 /* Suppress generate debug symbol entries for these types,
3029 since for normal C++ they are just clutter.
3030 However, push_lang_context undoes this if extern "Java" is seen. */
3031 DECL_IGNORED_P (decl) = 1;
3033 TYPE_FOR_JAVA (type) = 1;
3037 /* Push a type into the namespace so that the back-ends ignore it. */
3040 record_unknown_type (tree type, const char* name)
3042 tree decl = pushdecl (build_decl (TYPE_DECL, get_identifier (name), type));
3043 /* Make sure the "unknown type" typedecl gets ignored for debug info. */
3044 DECL_IGNORED_P (decl) = 1;
3045 TYPE_DECL_SUPPRESS_DEBUG (decl) = 1;
3046 TYPE_SIZE (type) = TYPE_SIZE (void_type_node);
3047 TYPE_ALIGN (type) = 1;
3048 TYPE_USER_ALIGN (type) = 0;
3049 TYPE_MODE (type) = TYPE_MODE (void_type_node);
3052 /* A string for which we should create an IDENTIFIER_NODE at
3055 typedef struct predefined_identifier
3057 /* The name of the identifier. */
3058 const char *const name;
3059 /* The place where the IDENTIFIER_NODE should be stored. */
3061 /* Nonzero if this is the name of a constructor or destructor. */
3062 const int ctor_or_dtor_p;
3063 } predefined_identifier;
3065 /* Create all the predefined identifiers. */
3068 initialize_predefined_identifiers (void)
3070 const predefined_identifier *pid;
3072 /* A table of identifiers to create at startup. */
3073 static const predefined_identifier predefined_identifiers[] = {
3074 { "C++", &lang_name_cplusplus, 0 },
3075 { "C", &lang_name_c, 0 },
3076 { "Java", &lang_name_java, 0 },
3077 /* Some of these names have a trailing space so that it is
3078 impossible for them to conflict with names written by users. */
3079 { "__ct ", &ctor_identifier, 1 },
3080 { "__base_ctor ", &base_ctor_identifier, 1 },
3081 { "__comp_ctor ", &complete_ctor_identifier, 1 },
3082 { "__dt ", &dtor_identifier, 1 },
3083 { "__comp_dtor ", &complete_dtor_identifier, 1 },
3084 { "__base_dtor ", &base_dtor_identifier, 1 },
3085 { "__deleting_dtor ", &deleting_dtor_identifier, 1 },
3086 { IN_CHARGE_NAME, &in_charge_identifier, 0 },
3087 { "nelts", &nelts_identifier, 0 },
3088 { THIS_NAME, &this_identifier, 0 },
3089 { VTABLE_DELTA_NAME, &delta_identifier, 0 },
3090 { VTABLE_PFN_NAME, &pfn_identifier, 0 },
3091 { "_vptr", &vptr_identifier, 0 },
3092 { "__vtt_parm", &vtt_parm_identifier, 0 },
3093 { "::", &global_scope_name, 0 },
3094 { "std", &std_identifier, 0 },
3098 for (pid = predefined_identifiers; pid->name; ++pid)
3100 *pid->node = get_identifier (pid->name);
3101 if (pid->ctor_or_dtor_p)
3102 IDENTIFIER_CTOR_OR_DTOR_P (*pid->node) = 1;
3106 /* Create the predefined scalar types of C,
3107 and some nodes representing standard constants (0, 1, (void *)0).
3108 Initialize the global binding level.
3109 Make definitions for built-in primitive functions. */
3112 cxx_init_decl_processing (void)
3115 tree void_ftype_ptr;
3117 build_common_tree_nodes (flag_signed_char, false);
3119 /* Create all the identifiers we need. */
3120 initialize_predefined_identifiers ();
3122 /* Create the global variables. */
3123 push_to_top_level ();
3125 current_function_decl = NULL_TREE;
3126 current_binding_level = NULL;
3127 /* Enter the global namespace. */
3128 gcc_assert (global_namespace == NULL_TREE);
3129 global_namespace = build_lang_decl (NAMESPACE_DECL, global_scope_name,
3131 TREE_PUBLIC (global_namespace) = 1;
3132 begin_scope (sk_namespace, global_namespace);
3134 current_lang_name = NULL_TREE;
3136 /* Adjust various flags based on command-line settings. */
3137 if (!flag_permissive)
3138 flag_pedantic_errors = 1;
3139 if (!flag_no_inline)
3141 flag_inline_trees = 1;
3144 if (flag_inline_functions)
3145 flag_inline_trees = 2;
3147 /* Force minimum function alignment if using the least significant
3148 bit of function pointers to store the virtual bit. */
3149 if (TARGET_PTRMEMFUNC_VBIT_LOCATION == ptrmemfunc_vbit_in_pfn
3150 && force_align_functions_log < 1)
3151 force_align_functions_log = 1;
3154 current_lang_name = lang_name_c;
3156 /* Create the `std' namespace. */
3157 push_namespace (std_identifier);
3158 std_node = current_namespace;
3161 c_common_nodes_and_builtins ();
3163 java_byte_type_node = record_builtin_java_type ("__java_byte", 8);
3164 java_short_type_node = record_builtin_java_type ("__java_short", 16);
3165 java_int_type_node = record_builtin_java_type ("__java_int", 32);
3166 java_long_type_node = record_builtin_java_type ("__java_long", 64);
3167 java_float_type_node = record_builtin_java_type ("__java_float", -32);
3168 java_double_type_node = record_builtin_java_type ("__java_double", -64);
3169 java_char_type_node = record_builtin_java_type ("__java_char", -16);
3170 java_boolean_type_node = record_builtin_java_type ("__java_boolean", -1);
3172 integer_two_node = build_int_cst (NULL_TREE, 2);
3173 integer_three_node = build_int_cst (NULL_TREE, 3);
3175 record_builtin_type (RID_BOOL, "bool", boolean_type_node);
3176 truthvalue_type_node = boolean_type_node;
3177 truthvalue_false_node = boolean_false_node;
3178 truthvalue_true_node = boolean_true_node;
3180 empty_except_spec = build_tree_list (NULL_TREE, NULL_TREE);
3183 record_builtin_type (RID_MAX, NULL, string_type_node);
3186 delta_type_node = ptrdiff_type_node;
3187 vtable_index_type = ptrdiff_type_node;
3189 vtt_parm_type = build_pointer_type (const_ptr_type_node);
3190 void_ftype = build_function_type (void_type_node, void_list_node);
3191 void_ftype_ptr = build_function_type (void_type_node,
3192 tree_cons (NULL_TREE,
3196 = build_exception_variant (void_ftype_ptr, empty_except_spec);
3198 /* C++ extensions */
3200 unknown_type_node = make_node (UNKNOWN_TYPE);
3201 record_unknown_type (unknown_type_node, "unknown type");
3203 /* Indirecting an UNKNOWN_TYPE node yields an UNKNOWN_TYPE node. */
3204 TREE_TYPE (unknown_type_node) = unknown_type_node;
3206 /* Looking up TYPE_POINTER_TO and TYPE_REFERENCE_TO yield the same
3208 TYPE_POINTER_TO (unknown_type_node) = unknown_type_node;
3209 TYPE_REFERENCE_TO (unknown_type_node) = unknown_type_node;
3212 /* Make sure we get a unique function type, so we can give
3213 its pointer type a name. (This wins for gdb.) */
3214 tree vfunc_type = make_node (FUNCTION_TYPE);
3215 TREE_TYPE (vfunc_type) = integer_type_node;
3216 TYPE_ARG_TYPES (vfunc_type) = NULL_TREE;
3217 layout_type (vfunc_type);
3219 vtable_entry_type = build_pointer_type (vfunc_type);
3221 record_builtin_type (RID_MAX, VTBL_PTR_TYPE, vtable_entry_type);
3224 = build_cplus_array_type (vtable_entry_type, NULL_TREE);
3225 layout_type (vtbl_type_node);
3226 vtbl_type_node = build_qualified_type (vtbl_type_node, TYPE_QUAL_CONST);
3227 record_builtin_type (RID_MAX, NULL, vtbl_type_node);
3228 vtbl_ptr_type_node = build_pointer_type (vtable_entry_type);
3229 layout_type (vtbl_ptr_type_node);
3230 record_builtin_type (RID_MAX, NULL, vtbl_ptr_type_node);
3232 push_namespace (get_identifier ("__cxxabiv1"));
3233 abi_node = current_namespace;
3236 global_type_node = make_node (LANG_TYPE);
3237 record_unknown_type (global_type_node, "global type");
3240 current_lang_name = lang_name_cplusplus;
3244 tree bad_alloc_type_node;
3245 tree bad_alloc_decl;
3246 tree newtype, deltype;
3247 tree ptr_ftype_sizetype;
3249 push_namespace (std_identifier);
3250 bad_alloc_id = get_identifier ("bad_alloc");
3251 bad_alloc_type_node = make_aggr_type (RECORD_TYPE);
3252 TYPE_CONTEXT (bad_alloc_type_node) = current_namespace;
3254 = create_implicit_typedef (bad_alloc_id, bad_alloc_type_node);
3255 DECL_CONTEXT (bad_alloc_decl) = current_namespace;
3256 TYPE_STUB_DECL (bad_alloc_type_node) = bad_alloc_decl;
3260 = build_function_type (ptr_type_node,
3261 tree_cons (NULL_TREE,
3264 newtype = build_exception_variant
3265 (ptr_ftype_sizetype, add_exception_specifier
3266 (NULL_TREE, bad_alloc_type_node, -1));
3267 deltype = build_exception_variant (void_ftype_ptr, empty_except_spec);
3268 push_cp_library_fn (NEW_EXPR, newtype);
3269 push_cp_library_fn (VEC_NEW_EXPR, newtype);
3270 global_delete_fndecl = push_cp_library_fn (DELETE_EXPR, deltype);
3271 push_cp_library_fn (VEC_DELETE_EXPR, deltype);
3275 = build_library_fn_ptr ("__cxa_pure_virtual", void_ftype);
3277 /* Perform other language dependent initializations. */
3278 init_class_processing ();
3279 init_rtti_processing ();
3281 if (flag_exceptions)
3282 init_exception_processing ();
3284 if (! supports_one_only ())
3287 make_fname_decl = cp_make_fname_decl;
3288 start_fname_decls ();
3290 /* Show we use EH for cleanups. */
3291 if (flag_exceptions)
3292 using_eh_for_cleanups ();
3295 /* Generate an initializer for a function naming variable from
3296 NAME. NAME may be NULL, to indicate a dependent name. TYPE_P is
3297 filled in with the type of the init. */
3300 cp_fname_init (const char* name, tree *type_p)
3302 tree domain = NULL_TREE;
3304 tree init = NULL_TREE;
3309 length = strlen (name);
3310 domain = build_index_type (size_int (length));
3311 init = build_string (length + 1, name);
3314 type = build_qualified_type (char_type_node, TYPE_QUAL_CONST);
3315 type = build_cplus_array_type (type, domain);
3320 TREE_TYPE (init) = type;
3322 init = error_mark_node;
3327 /* Create the VAR_DECL for __FUNCTION__ etc. ID is the name to give the
3328 decl, NAME is the initialization string and TYPE_DEP indicates whether
3329 NAME depended on the type of the function. We make use of that to detect
3330 __PRETTY_FUNCTION__ inside a template fn. This is being done
3331 lazily at the point of first use, so we mustn't push the decl now. */
3334 cp_make_fname_decl (tree id, int type_dep)
3336 const char *const name = (type_dep && processing_template_decl
3337 ? NULL : fname_as_string (type_dep));
3339 tree init = cp_fname_init (name, &type);
3340 tree decl = build_decl (VAR_DECL, id, type);
3343 free ((char *) name);
3345 /* As we're using pushdecl_with_scope, we must set the context. */
3346 DECL_CONTEXT (decl) = current_function_decl;
3347 DECL_PRETTY_FUNCTION_P (decl) = type_dep;
3349 TREE_STATIC (decl) = 1;
3350 TREE_READONLY (decl) = 1;
3351 DECL_ARTIFICIAL (decl) = 1;
3353 TREE_USED (decl) = 1;
3355 if (current_function_decl)
3357 struct cp_binding_level *b = current_binding_level;
3358 while (b->level_chain->kind != sk_function_parms)
3360 pushdecl_with_scope (decl, b, /*is_friend=*/false);
3361 cp_finish_decl (decl, init, /*init_const_expr_p=*/false, NULL_TREE,
3362 LOOKUP_ONLYCONVERTING);
3365 pushdecl_top_level_and_finish (decl, init);
3370 /* Make a definition for a builtin function named NAME in the current
3371 namespace, whose data type is TYPE and whose context is CONTEXT.
3372 TYPE should be a function type with argument types.
3374 CLASS and CODE tell later passes how to compile calls to this function.
3375 See tree.h for possible values.
3377 If LIBNAME is nonzero, use that for DECL_ASSEMBLER_NAME,
3378 the name to be called if we can't opencode the function.
3379 If ATTRS is nonzero, use that for the function's attribute
3383 builtin_function_1 (const char* name,
3386 enum built_in_function code,
3387 enum built_in_class class,
3388 const char* libname,
3391 tree decl = build_library_fn_1 (get_identifier (name), ERROR_MARK, type);
3392 DECL_BUILT_IN_CLASS (decl) = class;
3393 DECL_FUNCTION_CODE (decl) = code;
3394 DECL_CONTEXT (decl) = context;
3398 /* Since `pushdecl' relies on DECL_ASSEMBLER_NAME instead of DECL_NAME,
3399 we cannot change DECL_ASSEMBLER_NAME until we have installed this
3400 function in the namespace. */
3402 SET_DECL_ASSEMBLER_NAME (decl, get_identifier (libname));
3404 /* A function in the user's namespace should have an explicit
3405 declaration before it is used. Mark the built-in function as
3406 anticipated but not actually declared. */
3407 if (name[0] != '_' || name[1] != '_')
3408 DECL_ANTICIPATED (decl) = 1;
3410 /* Possibly apply some default attributes to this built-in function. */
3412 decl_attributes (&decl, attrs, ATTR_FLAG_BUILT_IN);
3414 decl_attributes (&decl, NULL_TREE, 0);
3419 /* Entry point for the benefit of c_common_nodes_and_builtins.
3421 Make a definition for a builtin function named NAME and whose data type
3422 is TYPE. TYPE should be a function type with argument types. This
3423 function places the anticipated declaration in the global namespace
3424 and additionally in the std namespace if appropriate.
3426 CLASS and CODE tell later passes how to compile calls to this function.
3427 See tree.h for possible values.
3429 If LIBNAME is nonzero, use that for DECL_ASSEMBLER_NAME,
3430 the name to be called if we can't opencode the function.
3432 If ATTRS is nonzero, use that for the function's attribute
3436 builtin_function (const char* name,
3439 enum built_in_class cl,
3440 const char* libname,
3443 /* All builtins that don't begin with an '_' should additionally
3444 go in the 'std' namespace. */
3447 push_namespace (std_identifier);
3448 builtin_function_1 (name, type, std_node, code, cl, libname, attrs);
3452 return builtin_function_1 (name, type, NULL_TREE, code,
3453 cl, libname, attrs);
3456 /* Generate a FUNCTION_DECL with the typical flags for a runtime library
3457 function. Not called directly. */
3460 build_library_fn_1 (tree name, enum tree_code operator_code, tree type)
3462 tree fn = build_lang_decl (FUNCTION_DECL, name, type);
3463 DECL_EXTERNAL (fn) = 1;
3464 TREE_PUBLIC (fn) = 1;
3465 DECL_ARTIFICIAL (fn) = 1;
3466 SET_OVERLOADED_OPERATOR_CODE (fn, operator_code);
3467 SET_DECL_LANGUAGE (fn, lang_c);
3468 /* Runtime library routines are, by definition, available in an
3469 external shared object. */
3470 DECL_VISIBILITY (fn) = VISIBILITY_DEFAULT;
3471 DECL_VISIBILITY_SPECIFIED (fn) = 1;
3475 /* Returns the _DECL for a library function with C linkage.
3476 We assume that such functions never throw; if this is incorrect,
3477 callers should unset TREE_NOTHROW. */
3480 build_library_fn (tree name, tree type)
3482 tree fn = build_library_fn_1 (name, ERROR_MARK, type);
3483 TREE_NOTHROW (fn) = 1;
3487 /* Returns the _DECL for a library function with C++ linkage. */
3490 build_cp_library_fn (tree name, enum tree_code operator_code, tree type)
3492 tree fn = build_library_fn_1 (name, operator_code, type);
3493 TREE_NOTHROW (fn) = TYPE_NOTHROW_P (type);
3494 DECL_CONTEXT (fn) = FROB_CONTEXT (current_namespace);
3495 SET_DECL_LANGUAGE (fn, lang_cplusplus);
3499 /* Like build_library_fn, but takes a C string instead of an
3503 build_library_fn_ptr (const char* name, tree type)
3505 return build_library_fn (get_identifier (name), type);
3508 /* Like build_cp_library_fn, but takes a C string instead of an
3512 build_cp_library_fn_ptr (const char* name, tree type)
3514 return build_cp_library_fn (get_identifier (name), ERROR_MARK, type);
3517 /* Like build_library_fn, but also pushes the function so that we will
3518 be able to find it via IDENTIFIER_GLOBAL_VALUE. */
3521 push_library_fn (tree name, tree type)
3523 tree fn = build_library_fn (name, type);
3524 pushdecl_top_level (fn);
3528 /* Like build_cp_library_fn, but also pushes the function so that it
3529 will be found by normal lookup. */
3532 push_cp_library_fn (enum tree_code operator_code, tree type)
3534 tree fn = build_cp_library_fn (ansi_opname (operator_code),
3541 /* Like push_library_fn, but takes a TREE_LIST of parm types rather than
3545 push_void_library_fn (tree name, tree parmtypes)
3547 tree type = build_function_type (void_type_node, parmtypes);
3548 return push_library_fn (name, type);
3551 /* Like push_library_fn, but also note that this function throws
3552 and does not return. Used for __throw_foo and the like. */
3555 push_throw_library_fn (tree name, tree type)
3557 tree fn = push_library_fn (name, type);
3558 TREE_THIS_VOLATILE (fn) = 1;
3559 TREE_NOTHROW (fn) = 0;
3563 /* When we call finish_struct for an anonymous union, we create
3564 default copy constructors and such. But, an anonymous union
3565 shouldn't have such things; this function undoes the damage to the
3566 anonymous union type T.
3568 (The reason that we create the synthesized methods is that we don't
3569 distinguish `union { int i; }' from `typedef union { int i; } U'.
3570 The first is an anonymous union; the second is just an ordinary
3574 fixup_anonymous_aggr (tree t)
3578 /* Wipe out memory of synthesized methods. */
3579 TYPE_HAS_CONSTRUCTOR (t) = 0;
3580 TYPE_HAS_DEFAULT_CONSTRUCTOR (t) = 0;
3581 TYPE_HAS_INIT_REF (t) = 0;
3582 TYPE_HAS_CONST_INIT_REF (t) = 0;
3583 TYPE_HAS_ASSIGN_REF (t) = 0;
3584 TYPE_HAS_CONST_ASSIGN_REF (t) = 0;
3586 /* Splice the implicitly generated functions out of the TYPE_METHODS
3588 q = &TYPE_METHODS (t);
3591 if (DECL_ARTIFICIAL (*q))
3592 *q = TREE_CHAIN (*q);
3594 q = &TREE_CHAIN (*q);
3597 /* ISO C++ 9.5.3. Anonymous unions may not have function members. */
3598 if (TYPE_METHODS (t))
3599 error ("%Jan anonymous union cannot have function members",
3600 TYPE_MAIN_DECL (t));
3602 /* Anonymous aggregates cannot have fields with ctors, dtors or complex
3603 assignment operators (because they cannot have these methods themselves).
3604 For anonymous unions this is already checked because they are not allowed
3605 in any union, otherwise we have to check it. */
3606 if (TREE_CODE (t) != UNION_TYPE)
3610 for (field = TYPE_FIELDS (t); field; field = TREE_CHAIN (field))
3611 if (TREE_CODE (field) == FIELD_DECL)
3613 type = TREE_TYPE (field);
3614 if (CLASS_TYPE_P (type))
3616 if (TYPE_NEEDS_CONSTRUCTING (type))
3617 error ("member %q+#D with constructor not allowed "
3618 "in anonymous aggregate", field);
3619 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type))
3620 error ("member %q+#D with destructor not allowed "
3621 "in anonymous aggregate", field);
3622 if (TYPE_HAS_COMPLEX_ASSIGN_REF (type))
3623 error ("member %q+#D with copy assignment operator "
3624 "not allowed in anonymous aggregate", field);
3630 /* Make sure that a declaration with no declarator is well-formed, i.e.
3631 just declares a tagged type or anonymous union.
3633 Returns the type declared; or NULL_TREE if none. */
3636 check_tag_decl (cp_decl_specifier_seq *declspecs)
3638 int saw_friend = declspecs->specs[(int)ds_friend] != 0;
3639 int saw_typedef = declspecs->specs[(int)ds_typedef] != 0;
3640 /* If a class, struct, or enum type is declared by the DECLSPECS
3641 (i.e, if a class-specifier, enum-specifier, or non-typename
3642 elaborated-type-specifier appears in the DECLSPECS),
3643 DECLARED_TYPE is set to the corresponding type. */
3644 tree declared_type = NULL_TREE;
3645 bool error_p = false;
3647 if (declspecs->multiple_types_p)
3648 error ("multiple types in one declaration");
3649 else if (declspecs->redefined_builtin_type)
3651 if (!in_system_header)
3652 pedwarn ("redeclaration of C++ built-in type %qT",
3653 declspecs->redefined_builtin_type);
3658 && TYPE_P (declspecs->type)
3659 && ((TREE_CODE (declspecs->type) != TYPENAME_TYPE
3660 && IS_AGGR_TYPE (declspecs->type))
3661 || TREE_CODE (declspecs->type) == ENUMERAL_TYPE))
3662 declared_type = declspecs->type;
3663 else if (declspecs->type == error_mark_node)
3665 if (declared_type == NULL_TREE && ! saw_friend && !error_p)
3666 pedwarn ("declaration does not declare anything");
3667 /* Check for an anonymous union. */
3668 else if (declared_type && IS_AGGR_TYPE_CODE (TREE_CODE (declared_type))
3669 && TYPE_ANONYMOUS_P (declared_type))
3671 /* 7/3 In a simple-declaration, the optional init-declarator-list
3672 can be omitted only when declaring a class (clause 9) or
3673 enumeration (7.2), that is, when the decl-specifier-seq contains
3674 either a class-specifier, an elaborated-type-specifier with
3675 a class-key (9.1), or an enum-specifier. In these cases and
3676 whenever a class-specifier or enum-specifier is present in the
3677 decl-specifier-seq, the identifiers in these specifiers are among
3678 the names being declared by the declaration (as class-name,
3679 enum-names, or enumerators, depending on the syntax). In such
3680 cases, and except for the declaration of an unnamed bit-field (9.6),
3681 the decl-specifier-seq shall introduce one or more names into the
3682 program, or shall redeclare a name introduced by a previous
3683 declaration. [Example:
3684 enum { }; // ill-formed
3685 typedef class { }; // ill-formed
3689 error ("missing type-name in typedef-declaration");
3692 /* Anonymous unions are objects, so they can have specifiers. */;
3693 SET_ANON_AGGR_TYPE_P (declared_type);
3695 if (TREE_CODE (declared_type) != UNION_TYPE && pedantic
3696 && !in_system_header)
3697 pedwarn ("ISO C++ prohibits anonymous structs");
3702 if (declspecs->specs[(int)ds_inline]
3703 || declspecs->specs[(int)ds_virtual])
3704 error ("%qs can only be specified for functions",
3705 declspecs->specs[(int)ds_inline]
3706 ? "inline" : "virtual");
3708 && (!current_class_type
3709 || current_scope () != current_class_type))
3710 error ("%<friend%> can only be specified inside a class");
3711 else if (declspecs->specs[(int)ds_explicit])
3712 error ("%<explicit%> can only be specified for constructors");
3713 else if (declspecs->storage_class)
3714 error ("a storage class can only be specified for objects "
3716 else if (declspecs->specs[(int)ds_const]
3717 || declspecs->specs[(int)ds_volatile]
3718 || declspecs->specs[(int)ds_restrict]
3719 || declspecs->specs[(int)ds_thread])
3720 error ("qualifiers can only be specified for objects "
3724 return declared_type;
3727 /* Called when a declaration is seen that contains no names to declare.
3728 If its type is a reference to a structure, union or enum inherited
3729 from a containing scope, shadow that tag name for the current scope
3730 with a forward reference.
3731 If its type defines a new named structure or union
3732 or defines an enum, it is valid but we need not do anything here.
3733 Otherwise, it is an error.
3735 C++: may have to grok the declspecs to learn about static,
3736 complain for anonymous unions.
3738 Returns the TYPE declared -- or NULL_TREE if none. */
3741 shadow_tag (cp_decl_specifier_seq *declspecs)
3743 tree t = check_tag_decl (declspecs);
3748 if (declspecs->attributes)
3750 warning (0, "attribute ignored in declaration of %q+#T", t);
3751 warning (0, "attribute for %q+#T must follow the %qs keyword",
3752 t, class_key_or_enum_as_string (t));
3756 maybe_process_partial_specialization (t);
3758 /* This is where the variables in an anonymous union are
3759 declared. An anonymous union declaration looks like:
3761 because there is no declarator after the union, the parser
3762 sends that declaration here. */
3763 if (ANON_AGGR_TYPE_P (t))
3765 fixup_anonymous_aggr (t);
3767 if (TYPE_FIELDS (t))
3769 tree decl = grokdeclarator (/*declarator=*/NULL,
3770 declspecs, NORMAL, 0, NULL);
3771 finish_anon_union (decl);
3778 /* Decode a "typename", such as "int **", returning a ..._TYPE node. */
3781 groktypename (cp_decl_specifier_seq *type_specifiers,
3782 const cp_declarator *declarator)
3786 attrs = type_specifiers->attributes;
3787 type_specifiers->attributes = NULL_TREE;
3788 type = grokdeclarator (declarator, type_specifiers, TYPENAME, 0, &attrs);
3790 cplus_decl_attributes (&type, attrs, 0);
3794 /* Decode a declarator in an ordinary declaration or data definition.
3795 This is called as soon as the type information and variable name
3796 have been parsed, before parsing the initializer if any.
3797 Here we create the ..._DECL node, fill in its type,
3798 and put it on the list of decls for the current context.
3799 The ..._DECL node is returned as the value.
3801 Exception: for arrays where the length is not specified,
3802 the type is left null, to be filled in by `cp_finish_decl'.
3804 Function definitions do not come here; they go to start_function
3805 instead. However, external and forward declarations of functions
3806 do go through here. Structure field declarations are done by
3807 grokfield and not through here. */
3810 start_decl (const cp_declarator *declarator,
3811 cp_decl_specifier_seq *declspecs,
3814 tree prefix_attributes,
3815 tree *pushed_scope_p)
3821 *pushed_scope_p = NULL_TREE;
3823 /* An object declared as __attribute__((deprecated)) suppresses
3824 warnings of uses of other deprecated items. */
3825 if (lookup_attribute ("deprecated", attributes))
3826 deprecated_state = DEPRECATED_SUPPRESS;
3828 attributes = chainon (attributes, prefix_attributes);
3830 decl = grokdeclarator (declarator, declspecs, NORMAL, initialized,
3833 deprecated_state = DEPRECATED_NORMAL;
3835 if (decl == NULL_TREE || TREE_CODE (decl) == VOID_TYPE
3836 || decl == error_mark_node)
3837 return error_mark_node;
3839 type = TREE_TYPE (decl);
3841 context = DECL_CONTEXT (decl);
3845 *pushed_scope_p = push_scope (context);
3847 /* We are only interested in class contexts, later. */
3848 if (TREE_CODE (context) == NAMESPACE_DECL)
3849 context = NULL_TREE;
3853 /* Is it valid for this decl to have an initializer at all?
3854 If not, set INITIALIZED to zero, which will indirectly
3855 tell `cp_finish_decl' to ignore the initializer once it is parsed. */
3856 switch (TREE_CODE (decl))
3859 error ("typedef %qD is initialized (use __typeof__ instead)", decl);
3864 error ("function %q#D is initialized like a variable", decl);
3874 if (! toplevel_bindings_p ()
3875 && DECL_EXTERNAL (decl))
3876 warning (0, "declaration of %q#D has %<extern%> and is initialized",
3878 DECL_EXTERNAL (decl) = 0;
3879 if (toplevel_bindings_p ())
3880 TREE_STATIC (decl) = 1;
3883 /* Set attributes here so if duplicate decl, will have proper attributes. */
3884 cplus_decl_attributes (&decl, attributes, 0);
3886 /* Dllimported symbols cannot be defined. Static data members (which
3887 can be initialized in-class and dllimported) go through grokfield,
3888 not here, so we don't need to exclude those decls when checking for
3890 if (initialized && DECL_DLLIMPORT_P (decl))
3892 error ("definition of %q#D is marked %<dllimport%>", decl);
3893 DECL_DLLIMPORT_P (decl) = 0;
3896 /* If #pragma weak was used, mark the decl weak now. */
3897 maybe_apply_pragma_weak (decl);
3899 if (TREE_CODE (decl) == FUNCTION_DECL
3900 && DECL_DECLARED_INLINE_P (decl)
3901 && DECL_UNINLINABLE (decl)
3902 && lookup_attribute ("noinline", DECL_ATTRIBUTES (decl)))
3903 warning (0, "inline function %q+D given attribute noinline", decl);
3905 if (context && COMPLETE_TYPE_P (complete_type (context)))
3907 if (TREE_CODE (decl) == VAR_DECL)
3909 tree field = lookup_field (context, DECL_NAME (decl), 0, false);
3910 if (field == NULL_TREE || TREE_CODE (field) != VAR_DECL)
3911 error ("%q#D is not a static member of %q#T", decl, context);
3914 if (DECL_CONTEXT (field) != context)
3916 if (!same_type_p (DECL_CONTEXT (field), context))
3917 pedwarn ("ISO C++ does not permit %<%T::%D%> "
3918 "to be defined as %<%T::%D%>",
3919 DECL_CONTEXT (field), DECL_NAME (decl),
3920 context, DECL_NAME (decl));
3921 DECL_CONTEXT (decl) = DECL_CONTEXT (field);
3923 if (processing_specialization
3924 && template_class_depth (context) == 0
3925 && CLASSTYPE_TEMPLATE_SPECIALIZATION (context))
3926 error ("template header not allowed in member definition "
3927 "of explicitly specialized class");
3928 /* Static data member are tricky; an in-class initialization
3929 still doesn't provide a definition, so the in-class
3930 declaration will have DECL_EXTERNAL set, but will have an
3931 initialization. Thus, duplicate_decls won't warn
3932 about this situation, and so we check here. */
3933 if (initialized && DECL_INITIALIZED_IN_CLASS_P (field))
3934 error ("duplicate initialization of %qD", decl);
3935 if (duplicate_decls (decl, field, /*newdecl_is_friend=*/false))
3941 tree field = check_classfn (context, decl,
3942 (processing_template_decl
3943 > template_class_depth (context))
3944 ? current_template_parms
3946 if (field && duplicate_decls (decl, field,
3947 /*newdecl_is_friend=*/false))
3951 /* cp_finish_decl sets DECL_EXTERNAL if DECL_IN_AGGR_P is set. */
3952 DECL_IN_AGGR_P (decl) = 0;
3953 /* Do not mark DECL as an explicit specialization if it was not
3954 already marked as an instantiation; a declaration should
3955 never be marked as a specialization unless we know what
3956 template is being specialized. */
3957 if (DECL_LANG_SPECIFIC (decl) && DECL_USE_TEMPLATE (decl))
3959 SET_DECL_TEMPLATE_SPECIALIZATION (decl);
3961 /* [temp.expl.spec] An explicit specialization of a static data
3962 member of a template is a definition if the declaration
3963 includes an initializer; otherwise, it is a declaration.
3965 We check for processing_specialization so this only applies
3966 to the new specialization syntax. */
3967 if (!initialized && processing_specialization)
3968 DECL_EXTERNAL (decl) = 1;
3971 if (DECL_EXTERNAL (decl) && ! DECL_TEMPLATE_SPECIALIZATION (decl))
3972 pedwarn ("declaration of %q#D outside of class is not definition",
3976 /* Enter this declaration into the symbol table. */
3977 tem = maybe_push_decl (decl);
3979 if (processing_template_decl)
3980 tem = push_template_decl (tem);
3981 if (tem == error_mark_node)
3982 return error_mark_node;
3984 /* Tell the back-end to use or not use .common as appropriate. If we say
3985 -fconserve-space, we want this to save .data space, at the expense of
3986 wrong semantics. If we say -fno-conserve-space, we want this to
3987 produce errors about redefs; to do this we force variables into the
3989 if (flag_conserve_space
3990 && TREE_CODE (tem) == VAR_DECL
3991 && TREE_PUBLIC (tem)
3992 && !DECL_THREAD_LOCAL_P (tem)
3993 && !have_global_bss_p ())
3994 DECL_COMMON (tem) = 1;
3996 if (!processing_template_decl && TREE_CODE (tem) == VAR_DECL)
3997 start_decl_1 (tem, initialized);
4003 start_decl_1 (tree decl, bool initialized)
4007 gcc_assert (!processing_template_decl);
4009 if (error_operand_p (decl))
4012 gcc_assert (TREE_CODE (decl) == VAR_DECL);
4013 type = TREE_TYPE (decl);
4016 /* Is it valid for this decl to have an initializer at all?
4017 If not, set INITIALIZED to zero, which will indirectly
4018 tell `cp_finish_decl' to ignore the initializer once it is parsed. */
4020 /* Don't allow initializations for incomplete types except for
4021 arrays which might be completed by the initialization. */
4022 if (COMPLETE_TYPE_P (complete_type (type)))
4023 ; /* A complete type is ok. */
4024 else if (TREE_CODE (type) != ARRAY_TYPE)
4026 error ("variable %q#D has initializer but incomplete type", decl);
4028 type = TREE_TYPE (decl) = error_mark_node;
4030 else if (!COMPLETE_TYPE_P (complete_type (TREE_TYPE (type))))
4032 if (DECL_LANG_SPECIFIC (decl) && DECL_TEMPLATE_INFO (decl))
4033 error ("elements of array %q#D have incomplete type", decl);
4034 /* else we already gave an error in start_decl. */
4038 else if (IS_AGGR_TYPE (type)
4039 && ! DECL_EXTERNAL (decl))
4041 if (!COMPLETE_TYPE_P (complete_type (type)))
4043 error ("aggregate %q#D has incomplete type and cannot be defined",
4045 /* Change the type so that assemble_variable will give
4046 DECL an rtl we can live with: (mem (const_int 0)). */
4047 type = TREE_TYPE (decl) = error_mark_node;
4051 /* If any base type in the hierarchy of TYPE needs a constructor,
4052 then we set initialized to 1. This way any nodes which are
4053 created for the purposes of initializing this aggregate
4054 will live as long as it does. This is necessary for global
4055 aggregates which do not have their initializers processed until
4056 the end of the file. */
4057 initialized = TYPE_NEEDS_CONSTRUCTING (type);
4061 /* Create a new scope to hold this declaration if necessary.
4062 Whether or not a new scope is necessary cannot be determined
4063 until after the type has been completed; if the type is a
4064 specialization of a class template it is not until after
4065 instantiation has occurred that TYPE_HAS_NONTRIVIAL_DESTRUCTOR
4066 will be set correctly. */
4067 maybe_push_cleanup_level (type);
4070 /* Handle initialization of references. DECL, TYPE, and INIT have the
4071 same meaning as in cp_finish_decl. *CLEANUP must be NULL on entry,
4072 but will be set to a new CLEANUP_STMT if a temporary is created
4073 that must be destroyed subsequently.
4075 Returns an initializer expression to use to initialize DECL, or
4076 NULL if the initialization can be performed statically.
4078 Quotes on semantics can be found in ARM 8.4.3. */
4081 grok_reference_init (tree decl, tree type, tree init, tree *cleanup)
4085 if (init == NULL_TREE)
4087 if ((DECL_LANG_SPECIFIC (decl) == 0
4088 || DECL_IN_AGGR_P (decl) == 0)
4089 && ! DECL_THIS_EXTERN (decl))
4090 error ("%qD declared as reference but not initialized", decl);
4094 if (TREE_CODE (init) == CONSTRUCTOR)
4096 error ("ISO C++ forbids use of initializer list to "
4097 "initialize reference %qD", decl);
4101 if (TREE_CODE (init) == TREE_LIST)
4102 init = build_x_compound_expr_from_list (init, "initializer");
4104 if (TREE_CODE (TREE_TYPE (type)) != ARRAY_TYPE
4105 && TREE_CODE (TREE_TYPE (init)) == ARRAY_TYPE)
4106 /* Note: default conversion is only called in very special cases. */
4107 init = decay_conversion (init);
4109 /* Convert INIT to the reference type TYPE. This may involve the
4110 creation of a temporary, whose lifetime must be the same as that
4111 of the reference. If so, a DECL_EXPR for the temporary will be
4112 added just after the DECL_EXPR for DECL. That's why we don't set
4113 DECL_INITIAL for local references (instead assigning to them
4114 explicitly); we need to allow the temporary to be initialized
4116 tmp = initialize_reference (type, init, decl, cleanup);
4118 if (tmp == error_mark_node)
4120 else if (tmp == NULL_TREE)
4122 error ("cannot initialize %qT from %qT", type, TREE_TYPE (init));
4126 if (TREE_STATIC (decl) && !TREE_CONSTANT (tmp))
4129 DECL_INITIAL (decl) = tmp;
4134 /* When parsing `int a[] = {1, 2};' we don't know the size of the
4135 array until we finish parsing the initializer. If that's the
4136 situation we're in, update DECL accordingly. */
4139 maybe_deduce_size_from_array_init (tree decl, tree init)
4141 tree type = TREE_TYPE (decl);
4143 if (TREE_CODE (type) == ARRAY_TYPE
4144 && TYPE_DOMAIN (type) == NULL_TREE
4145 && TREE_CODE (decl) != TYPE_DECL)
4147 /* do_default is really a C-ism to deal with tentative definitions.
4148 But let's leave it here to ease the eventual merge. */
4149 int do_default = !DECL_EXTERNAL (decl);
4150 tree initializer = init ? init : DECL_INITIAL (decl);
4151 int failure = cp_complete_array_type (&TREE_TYPE (decl), initializer,
4156 error ("initializer fails to determine size of %qD", decl);
4157 TREE_TYPE (decl) = error_mark_node;
4159 else if (failure == 2)
4163 error ("array size missing in %qD", decl);
4164 TREE_TYPE (decl) = error_mark_node;
4166 /* If a `static' var's size isn't known, make it extern as
4167 well as static, so it does not get allocated. If it's not
4168 `static', then don't mark it extern; finish_incomplete_decl
4169 will give it a default size and it will get allocated. */
4170 else if (!pedantic && TREE_STATIC (decl) && !TREE_PUBLIC (decl))
4171 DECL_EXTERNAL (decl) = 1;
4173 else if (failure == 3)
4175 error ("zero-size array %qD", decl);
4176 TREE_TYPE (decl) = error_mark_node;
4179 cp_apply_type_quals_to_decl (cp_type_quals (TREE_TYPE (decl)), decl);
4181 layout_decl (decl, 0);
4185 /* Set DECL_SIZE, DECL_ALIGN, etc. for DECL (a VAR_DECL), and issue
4186 any appropriate error messages regarding the layout. */
4189 layout_var_decl (tree decl)
4193 if (TREE_STATIC (decl)
4194 && !DECL_ARTIFICIAL (decl)
4195 && current_function_decl
4196 && DECL_CONTEXT (decl) == current_function_decl)
4197 push_local_name (decl);
4199 type = TREE_TYPE (decl);
4200 if (type == error_mark_node)
4203 /* If we haven't already layed out this declaration, do so now.
4204 Note that we must not call complete type for an external object
4205 because it's type might involve templates that we are not
4206 supposed to instantiate yet. (And it's perfectly valid to say
4207 `extern X x' for some incomplete type `X'.) */
4208 if (!DECL_EXTERNAL (decl))
4209 complete_type (type);
4210 if (!DECL_SIZE (decl)
4211 && TREE_TYPE (decl) != error_mark_node
4212 && (COMPLETE_TYPE_P (type)
4213 || (TREE_CODE (type) == ARRAY_TYPE
4214 && !TYPE_DOMAIN (type)
4215 && COMPLETE_TYPE_P (TREE_TYPE (type)))))
4216 layout_decl (decl, 0);
4218 if (!DECL_EXTERNAL (decl) && DECL_SIZE (decl) == NULL_TREE)
4220 /* An automatic variable with an incomplete type: that is an error.
4221 Don't talk about array types here, since we took care of that
4222 message in grokdeclarator. */
4223 error ("storage size of %qD isn't known", decl);
4224 TREE_TYPE (decl) = error_mark_node;
4227 /* Keep this code around in case we later want to control debug info
4228 based on whether a type is "used". (jason 1999-11-11) */
4230 else if (!DECL_EXTERNAL (decl) && IS_AGGR_TYPE (ttype))
4231 /* Let debugger know it should output info for this type. */
4232 note_debug_info_needed (ttype);
4234 if (TREE_STATIC (decl) && DECL_CLASS_SCOPE_P (decl))
4235 note_debug_info_needed (DECL_CONTEXT (decl));
4238 if ((DECL_EXTERNAL (decl) || TREE_STATIC (decl))
4239 && DECL_SIZE (decl) != NULL_TREE
4240 && ! TREE_CONSTANT (DECL_SIZE (decl)))
4242 if (TREE_CODE (DECL_SIZE (decl)) == INTEGER_CST)
4243 constant_expression_warning (DECL_SIZE (decl));
4245 error ("storage size of %qD isn't constant", decl);
4249 /* If a local static variable is declared in an inline function, or if
4250 we have a weak definition, we must endeavor to create only one
4251 instance of the variable at link-time. */
4254 maybe_commonize_var (tree decl)
4256 /* Static data in a function with comdat linkage also has comdat
4258 if (TREE_STATIC (decl)
4259 /* Don't mess with __FUNCTION__. */
4260 && ! DECL_ARTIFICIAL (decl)
4261 && DECL_FUNCTION_SCOPE_P (decl)
4262 /* Unfortunately, import_export_decl has not always been called
4263 before the function is processed, so we cannot simply check
4265 && (DECL_COMDAT (DECL_CONTEXT (decl))
4266 || ((DECL_DECLARED_INLINE_P (DECL_CONTEXT (decl))
4267 || DECL_TEMPLATE_INSTANTIATION (DECL_CONTEXT (decl)))
4268 && TREE_PUBLIC (DECL_CONTEXT (decl)))))
4272 /* With weak symbols, we simply make the variable COMDAT;
4273 that will cause copies in multiple translations units to
4275 comdat_linkage (decl);
4279 if (DECL_INITIAL (decl) == NULL_TREE
4280 || DECL_INITIAL (decl) == error_mark_node)
4282 /* Without weak symbols, we can use COMMON to merge
4283 uninitialized variables. */
4284 TREE_PUBLIC (decl) = 1;
4285 DECL_COMMON (decl) = 1;
4289 /* While for initialized variables, we must use internal
4290 linkage -- which means that multiple copies will not
4292 TREE_PUBLIC (decl) = 0;
4293 DECL_COMMON (decl) = 0;
4294 warning (0, "sorry: semantics of inline function static "
4295 "data %q+#D are wrong (you'll wind up "
4296 "with multiple copies)", decl);
4297 warning (0, "%J you can work around this by removing "
4303 else if (DECL_LANG_SPECIFIC (decl) && DECL_COMDAT (decl))
4304 /* Set it up again; we might have set DECL_INITIAL since the last
4306 comdat_linkage (decl);
4309 /* Issue an error message if DECL is an uninitialized const variable. */
4312 check_for_uninitialized_const_var (tree decl)
4314 tree type = TREE_TYPE (decl);
4316 /* ``Unless explicitly declared extern, a const object does not have
4317 external linkage and must be initialized. ($8.4; $12.1)'' ARM
4319 if (TREE_CODE (decl) == VAR_DECL
4320 && TREE_CODE (type) != REFERENCE_TYPE
4321 && CP_TYPE_CONST_P (type)
4322 && !TYPE_NEEDS_CONSTRUCTING (type)
4323 && !DECL_INITIAL (decl))
4324 error ("uninitialized const %qD", decl);
4328 /* Structure holding the current initializer being processed by reshape_init.
4329 CUR is a pointer to the current element being processed, END is a pointer
4330 after the last element present in the initializer. */
4331 typedef struct reshape_iterator_t
4333 constructor_elt *cur;
4334 constructor_elt *end;
4337 static tree reshape_init_r (tree, reshape_iter *, bool);
4339 /* FIELD is a FIELD_DECL or NULL. In the former case, the value
4340 returned is the next FIELD_DECL (possibly FIELD itself) that can be
4341 initialized. If there are no more such fields, the return value
4345 next_initializable_field (tree field)
4348 && (TREE_CODE (field) != FIELD_DECL
4349 || (DECL_C_BIT_FIELD (field) && !DECL_NAME (field))
4350 || DECL_ARTIFICIAL (field)))
4351 field = TREE_CHAIN (field);
4356 /* Subroutine of reshape_init_array and reshape_init_vector, which does
4357 the actual work. ELT_TYPE is the element type of the array. MAX_INDEX is an
4358 INTEGER_CST representing the size of the array minus one (the maximum index),
4359 or NULL_TREE if the array was declared without specifying the size. D is
4360 the iterator within the constructor. */
4363 reshape_init_array_1 (tree elt_type, tree max_index, reshape_iter *d)
4366 bool sized_array_p = (max_index != NULL_TREE);
4367 unsigned HOST_WIDE_INT max_index_cst = 0;
4368 unsigned HOST_WIDE_INT index;
4370 /* The initializer for an array is always a CONSTRUCTOR. */
4371 new_init = build_constructor (NULL_TREE, NULL);
4375 /* Minus 1 is used for zero sized arrays. */
4376 if (integer_all_onesp (max_index))
4379 if (host_integerp (max_index, 1))
4380 max_index_cst = tree_low_cst (max_index, 1);
4381 /* sizetype is sign extended, not zero extended. */
4383 max_index_cst = tree_low_cst (fold_convert (size_type_node, max_index),
4387 /* Loop until there are no more initializers. */
4389 d->cur != d->end && (!sized_array_p || index <= max_index_cst);
4396 /* Handle array designated initializers (GNU extension). */
4397 if (TREE_CODE (d->cur->index) == IDENTIFIER_NODE)
4399 error ("name %qD used in a GNU-style designated "
4400 "initializer for an array", d->cur->index);
4406 elt_init = reshape_init_r (elt_type, d, /*first_initializer_p=*/false);
4407 if (elt_init == error_mark_node)
4408 return error_mark_node;
4409 CONSTRUCTOR_APPEND_ELT (CONSTRUCTOR_ELTS (new_init), NULL_TREE, elt_init);
4415 /* Subroutine of reshape_init_r, processes the initializers for arrays.
4416 Parameters are the same of reshape_init_r. */
4419 reshape_init_array (tree type, reshape_iter *d)
4421 tree max_index = NULL_TREE;
4423 gcc_assert (TREE_CODE (type) == ARRAY_TYPE);
4425 if (TYPE_DOMAIN (type))
4426 max_index = array_type_nelts (type);
4428 return reshape_init_array_1 (TREE_TYPE (type), max_index, d);
4431 /* Subroutine of reshape_init_r, processes the initializers for vectors.
4432 Parameters are the same of reshape_init_r. */
4435 reshape_init_vector (tree type, reshape_iter *d)
4437 tree max_index = NULL_TREE;
4440 gcc_assert (TREE_CODE (type) == VECTOR_TYPE);
4442 if (COMPOUND_LITERAL_P (d->cur->value))
4444 tree value = d->cur->value;
4445 if (!same_type_p (TREE_TYPE (value), type))
4447 error ("invalid type %qT as initializer for a vector of type %qT",
4448 TREE_TYPE (d->cur->value), type);
4449 value = error_mark_node;
4455 /* For a vector, the representation type is a struct
4456 containing a single member which is an array of the
4457 appropriate size. */
4458 rtype = TYPE_DEBUG_REPRESENTATION_TYPE (type);
4459 if (rtype && TYPE_DOMAIN (TREE_TYPE (TYPE_FIELDS (rtype))))
4460 max_index = array_type_nelts (TREE_TYPE (TYPE_FIELDS (rtype)));
4462 return reshape_init_array_1 (TREE_TYPE (type), max_index, d);
4465 /* Subroutine of reshape_init_r, processes the initializers for classes
4466 or union. Parameters are the same of reshape_init_r. */
4469 reshape_init_class (tree type, reshape_iter *d, bool first_initializer_p)
4474 gcc_assert (CLASS_TYPE_P (type));
4476 /* The initializer for a class is always a CONSTRUCTOR. */
4477 new_init = build_constructor (NULL_TREE, NULL);
4478 field = next_initializable_field (TYPE_FIELDS (type));
4484 An initializer for an aggregate member that is an
4485 empty class shall have the form of an empty
4486 initializer-list {}. */
4487 if (!first_initializer_p)
4489 error ("initializer for %qT must be brace-enclosed", type);
4490 return error_mark_node;
4495 /* Loop through the initializable fields, gathering initializers. */
4496 while (d->cur != d->end)
4500 /* Handle designated initializers, as an extension. */
4504 pedwarn ("ISO C++ does not allow designated initializers");
4506 field = lookup_field_1 (type, d->cur->index, /*want_type=*/false);
4508 if (!field || TREE_CODE (field) != FIELD_DECL)
4510 error ("%qT has no non-static data member named %qD", type,
4512 return error_mark_node;
4516 /* If we processed all the member of the class, we are done. */
4520 field_init = reshape_init_r (TREE_TYPE (field), d,
4521 /*first_initializer_p=*/false);
4522 CONSTRUCTOR_APPEND_ELT (CONSTRUCTOR_ELTS (new_init), field, field_init);
4526 When a union is initialized with a brace-enclosed
4527 initializer, the braces shall only contain an
4528 initializer for the first member of the union. */
4529 if (TREE_CODE (type) == UNION_TYPE)
4532 field = next_initializable_field (TREE_CHAIN (field));
4538 /* Subroutine of reshape_init, which processes a single initializer (part of
4539 a CONSTRUCTOR). TYPE is the type of the variable being initialized, D is the
4540 iterator within the CONSTRUCTOR which points to the initializer to process.
4541 FIRST_INITIALIZER_P is true if this is the first initializer of the
4542 CONSTRUCTOR node. */
4545 reshape_init_r (tree type, reshape_iter *d, bool first_initializer_p)
4547 tree init = d->cur->value;
4549 /* A non-aggregate type is always initialized with a single
4551 if (!CP_AGGREGATE_TYPE_P (type))
4553 /* It is invalid to initialize a non-aggregate type with a
4554 brace-enclosed initializer.
4555 We need to check for BRACE_ENCLOSED_INITIALIZER_P here because
4556 of g++.old-deja/g++.mike/p7626.C: a pointer-to-member constant is
4557 a CONSTRUCTOR (with a record type). */
4558 if (TREE_CODE (init) == CONSTRUCTOR
4559 && BRACE_ENCLOSED_INITIALIZER_P (init)) /* p7626.C */
4561 error ("braces around scalar initializer for type %qT", type);
4562 init = error_mark_node;
4571 All implicit type conversions (clause _conv_) are considered when
4572 initializing the aggregate member with an initializer from an
4573 initializer-list. If the initializer can initialize a member,
4574 the member is initialized. Otherwise, if the member is itself a
4575 non-empty subaggregate, brace elision is assumed and the
4576 initializer is considered for the initialization of the first
4577 member of the subaggregate. */
4578 if (TREE_CODE (init) != CONSTRUCTOR
4579 && can_convert_arg (type, TREE_TYPE (init), init, LOOKUP_NORMAL))
4585 /* [dcl.init.string]
4587 A char array (whether plain char, signed char, or unsigned char)
4588 can be initialized by a string-literal (optionally enclosed in
4589 braces); a wchar_t array can be initialized by a wide
4590 string-literal (optionally enclosed in braces). */
4591 if (TREE_CODE (type) == ARRAY_TYPE
4592 && char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (type))))
4594 tree str_init = init;
4596 /* Strip one level of braces if and only if they enclose a single
4597 element (as allowed by [dcl.init.string]). */
4598 if (!first_initializer_p
4599 && TREE_CODE (str_init) == CONSTRUCTOR
4600 && VEC_length (constructor_elt, CONSTRUCTOR_ELTS (str_init)) == 1)
4602 str_init = VEC_index (constructor_elt,
4603 CONSTRUCTOR_ELTS (str_init), 0)->value;
4606 /* If it's a string literal, then it's the initializer for the array
4607 as a whole. Otherwise, continue with normal initialization for
4608 array types (one value per array element). */
4609 if (TREE_CODE (str_init) == STRING_CST)
4616 /* The following cases are about aggregates. If we are not within a full
4617 initializer already, and there is not a CONSTRUCTOR, it means that there
4618 is a missing set of braces (that is, we are processing the case for
4619 which reshape_init exists). */
4620 if (!first_initializer_p)
4622 if (TREE_CODE (init) == CONSTRUCTOR)
4624 /* For a nested compound literal, there is no need to reshape since
4625 brace elision is not allowed. Even if we decided to allow it,
4626 we should add a call to reshape_init in finish_compound_literal,
4627 before calling digest_init, so changing this code would still
4628 not be necessary. */
4629 if (!COMPOUND_LITERAL_P (init))
4632 gcc_assert (BRACE_ENCLOSED_INITIALIZER_P (init));
4633 return reshape_init (type, init);
4636 gcc_assert (!BRACE_ENCLOSED_INITIALIZER_P (init));
4639 warning (OPT_Wmissing_braces, "missing braces around initializer for %qT",
4643 /* Dispatch to specialized routines. */
4644 if (CLASS_TYPE_P (type))
4645 return reshape_init_class (type, d, first_initializer_p);
4646 else if (TREE_CODE (type) == ARRAY_TYPE)
4647 return reshape_init_array (type, d);
4648 else if (TREE_CODE (type) == VECTOR_TYPE)
4649 return reshape_init_vector (type, d);
4654 /* Undo the brace-elision allowed by [dcl.init.aggr] in a
4655 brace-enclosed aggregate initializer.
4657 INIT is the CONSTRUCTOR containing the list of initializers describing
4658 a brace-enclosed initializer for an entity of the indicated aggregate TYPE.
4659 It may not presently match the shape of the TYPE; for example:
4661 struct S { int a; int b; };
4662 struct S a[] = { 1, 2, 3, 4 };
4664 Here INIT will hold a VEC of four elements, rather than a
4665 VEC of two elements, each itself a VEC of two elements. This
4666 routine transforms INIT from the former form into the latter. The
4667 revised CONSTRUCTOR node is returned. */
4670 reshape_init (tree type, tree init)
4672 VEC(constructor_elt, gc) *v;
4676 gcc_assert (BRACE_ENCLOSED_INITIALIZER_P (init));
4678 v = CONSTRUCTOR_ELTS (init);
4680 /* An empty constructor does not need reshaping, and it is always a valid
4682 if (VEC_empty (constructor_elt, v))
4685 /* Recurse on this CONSTRUCTOR. */
4686 d.cur = VEC_index (constructor_elt, v, 0);
4687 d.end = d.cur + VEC_length (constructor_elt, v);
4689 new_init = reshape_init_r (type, &d, true);
4690 if (new_init == error_mark_node)
4691 return error_mark_node;
4693 /* Make sure all the element of the constructor were used. Otherwise,
4694 issue an error about exceeding initializers. */
4696 error ("too many initializers for %qT", type);
4701 /* Verify INIT (the initializer for DECL), and record the
4702 initialization in DECL_INITIAL, if appropriate. CLEANUP is as for
4703 grok_reference_init.
4705 If the return value is non-NULL, it is an expression that must be
4706 evaluated dynamically to initialize DECL. */
4709 check_initializer (tree decl, tree init, int flags, tree *cleanup)
4711 tree type = TREE_TYPE (decl);
4712 tree init_code = NULL;
4714 /* Things that are going to be initialized need to have complete
4716 TREE_TYPE (decl) = type = complete_type (TREE_TYPE (decl));
4718 if (type == error_mark_node)
4719 /* We will have already complained. */
4721 else if (init && COMPLETE_TYPE_P (type)
4722 && !TREE_CONSTANT (TYPE_SIZE (type)))
4724 error ("variable-sized object %qD may not be initialized", decl);
4727 else if (TREE_CODE (type) == ARRAY_TYPE
4728 && !COMPLETE_TYPE_P (complete_type (TREE_TYPE (type))))
4730 error ("elements of array %q#D have incomplete type", decl);
4733 else if (TREE_CODE (type) != ARRAY_TYPE && !COMPLETE_TYPE_P (type))
4735 error ("%qD has incomplete type", decl);
4736 TREE_TYPE (decl) = error_mark_node;
4740 if (TREE_CODE (decl) == CONST_DECL)
4742 gcc_assert (TREE_CODE (type) != REFERENCE_TYPE);
4744 DECL_INITIAL (decl) = init;
4746 gcc_assert (init != NULL_TREE);
4749 else if (!DECL_EXTERNAL (decl) && TREE_CODE (type) == REFERENCE_TYPE)
4750 init = grok_reference_init (decl, type, init, cleanup);
4753 /* Do not reshape constructors of vectors (they don't need to be
4755 if (TREE_CODE (init) == CONSTRUCTOR
4756 && !COMPOUND_LITERAL_P (init)
4757 && !TREE_TYPE (init)) /* ptrmemfunc */
4759 init = reshape_init (type, init);
4761 if ((*targetm.vector_opaque_p) (type))
4763 error ("opaque vector types cannot be initialized");
4764 init = error_mark_node;
4768 /* If DECL has an array type without a specific bound, deduce the
4769 array size from the initializer. */
4770 maybe_deduce_size_from_array_init (decl, init);
4771 type = TREE_TYPE (decl);
4772 if (type == error_mark_node)
4775 if (TYPE_HAS_CONSTRUCTOR (type) || TYPE_NEEDS_CONSTRUCTING (type))
4777 if (TREE_CODE (type) == ARRAY_TYPE)
4778 goto initialize_aggr;
4779 else if (TREE_CODE (init) == CONSTRUCTOR)
4781 if (TYPE_NON_AGGREGATE_CLASS (type))
4783 error ("%qD must be initialized by constructor, "
4786 init = error_mark_node;
4789 goto dont_use_constructor;
4793 int saved_stmts_are_full_exprs_p;
4796 saved_stmts_are_full_exprs_p = 0;
4797 if (building_stmt_tree ())
4799 saved_stmts_are_full_exprs_p = stmts_are_full_exprs_p ();
4800 current_stmt_tree ()->stmts_are_full_exprs_p = 1;
4802 init = build_aggr_init (decl, init, flags);
4803 if (building_stmt_tree ())
4804 current_stmt_tree ()->stmts_are_full_exprs_p =
4805 saved_stmts_are_full_exprs_p;
4811 dont_use_constructor:
4812 if (TREE_CODE (init) != TREE_VEC)
4814 init_code = store_init_value (decl, init);
4815 if (pedantic && TREE_CODE (type) == ARRAY_TYPE
4816 && DECL_INITIAL (decl)
4817 && TREE_CODE (DECL_INITIAL (decl)) == STRING_CST
4818 && PAREN_STRING_LITERAL_P (DECL_INITIAL (decl)))
4819 warning (0, "array %qD initialized by parenthesized string literal %qE",
4820 decl, DECL_INITIAL (decl));
4825 else if (DECL_EXTERNAL (decl))
4827 else if (TYPE_P (type) && TYPE_NEEDS_CONSTRUCTING (type))
4828 goto initialize_aggr;
4829 else if (IS_AGGR_TYPE (type))
4831 tree core_type = strip_array_types (type);
4833 if (CLASSTYPE_READONLY_FIELDS_NEED_INIT (core_type))
4834 error ("structure %qD with uninitialized const members", decl);
4835 if (CLASSTYPE_REF_FIELDS_NEED_INIT (core_type))
4836 error ("structure %qD with uninitialized reference members", decl);
4838 check_for_uninitialized_const_var (decl);
4841 check_for_uninitialized_const_var (decl);
4843 if (init && init != error_mark_node)
4844 init_code = build2 (INIT_EXPR, type, decl, init);
4849 /* If DECL is not a local variable, give it RTL. */
4852 make_rtl_for_nonlocal_decl (tree decl, tree init, const char* asmspec)
4854 int toplev = toplevel_bindings_p ();
4856 const char *filename;
4858 /* Set the DECL_ASSEMBLER_NAME for the object. */
4861 /* The `register' keyword, when used together with an
4862 asm-specification, indicates that the variable should be
4863 placed in a particular register. */
4864 if (TREE_CODE (decl) == VAR_DECL && DECL_REGISTER (decl))
4866 set_user_assembler_name (decl, asmspec);
4867 DECL_HARD_REGISTER (decl) = 1;
4871 if (TREE_CODE (decl) == FUNCTION_DECL
4872 && DECL_BUILT_IN_CLASS (decl) == BUILT_IN_NORMAL)
4873 set_builtin_user_assembler_name (decl, asmspec);
4874 set_user_assembler_name (decl, asmspec);
4878 /* Handle non-variables up front. */
4879 if (TREE_CODE (decl) != VAR_DECL)
4881 rest_of_decl_compilation (decl, toplev, at_eof);
4885 /* If we see a class member here, it should be a static data
4887 if (DECL_LANG_SPECIFIC (decl) && DECL_IN_AGGR_P (decl))
4889 gcc_assert (TREE_STATIC (decl));
4890 /* An in-class declaration of a static data member should be
4891 external; it is only a declaration, and not a definition. */
4892 if (init == NULL_TREE)
4893 gcc_assert (DECL_EXTERNAL (decl));
4896 /* We don't create any RTL for local variables. */
4897 if (DECL_FUNCTION_SCOPE_P (decl) && !TREE_STATIC (decl))
4900 /* We defer emission of local statics until the corresponding
4901 DECL_EXPR is expanded. */
4902 defer_p = DECL_FUNCTION_SCOPE_P (decl) || DECL_VIRTUAL_P (decl);
4904 /* We try to defer namespace-scope static constants so that they are
4905 not emitted into the object file unnecessarily. */
4906 filename = input_filename;
4907 if (!DECL_VIRTUAL_P (decl)
4908 && TREE_READONLY (decl)
4909 && DECL_INITIAL (decl) != NULL_TREE
4910 && DECL_INITIAL (decl) != error_mark_node
4912 && ! EMPTY_CONSTRUCTOR_P (DECL_INITIAL (decl))
4914 && !TREE_PUBLIC (decl))
4916 /* Fool with the linkage of static consts according to #pragma
4918 struct c_fileinfo *finfo = get_fileinfo (lbasename (filename));
4919 if (!finfo->interface_unknown && !TREE_PUBLIC (decl))
4921 TREE_PUBLIC (decl) = 1;
4922 DECL_EXTERNAL (decl) = finfo->interface_only;
4927 /* Likewise for template instantiations. */
4928 else if (DECL_LANG_SPECIFIC (decl)
4929 && DECL_IMPLICIT_INSTANTIATION (decl))
4932 /* If we're not deferring, go ahead and assemble the variable. */
4934 rest_of_decl_compilation (decl, toplev, at_eof);
4937 /* Generate code to initialize DECL (a local variable). */
4940 initialize_local_var (tree decl, tree init)
4942 tree type = TREE_TYPE (decl);
4945 gcc_assert (TREE_CODE (decl) == VAR_DECL
4946 || TREE_CODE (decl) == RESULT_DECL);
4947 gcc_assert (!TREE_STATIC (decl));
4949 if (DECL_SIZE (decl) == NULL_TREE)
4951 /* If we used it already as memory, it must stay in memory. */
4952 DECL_INITIAL (decl) = NULL_TREE;
4953 TREE_ADDRESSABLE (decl) = TREE_USED (decl);
4956 if (DECL_SIZE (decl) && type != error_mark_node)
4960 /* Compute and store the initial value. */
4961 already_used = TREE_USED (decl) || TREE_USED (type);
4963 /* Perform the initialization. */
4966 int saved_stmts_are_full_exprs_p;
4968 gcc_assert (building_stmt_tree ());
4969 saved_stmts_are_full_exprs_p = stmts_are_full_exprs_p ();
4970 current_stmt_tree ()->stmts_are_full_exprs_p = 1;
4971 finish_expr_stmt (init);
4972 current_stmt_tree ()->stmts_are_full_exprs_p =
4973 saved_stmts_are_full_exprs_p;
4976 /* Set this to 0 so we can tell whether an aggregate which was
4977 initialized was ever used. Don't do this if it has a
4978 destructor, so we don't complain about the 'resource
4979 allocation is initialization' idiom. Now set
4980 attribute((unused)) on types so decls of that type will be
4981 marked used. (see TREE_USED, above.) */
4982 if (TYPE_NEEDS_CONSTRUCTING (type)
4984 && TYPE_HAS_TRIVIAL_DESTRUCTOR (type)
4985 && DECL_NAME (decl))
4986 TREE_USED (decl) = 0;
4987 else if (already_used)
4988 TREE_USED (decl) = 1;
4991 /* Generate a cleanup, if necessary. */
4992 cleanup = cxx_maybe_build_cleanup (decl);
4993 if (DECL_SIZE (decl) && cleanup)
4994 finish_decl_cleanup (decl, cleanup);
4997 /* DECL is a VAR_DECL for a compiler-generated variable with static
4998 storage duration (like a virtual table) whose initializer is a
4999 compile-time constant. INIT must be either a TREE_LIST of values,
5000 or a CONSTRUCTOR. Initialize the variable and provide it to the
5004 initialize_artificial_var (tree decl, tree init)
5006 if (TREE_CODE (init) == TREE_LIST)
5007 init = build_constructor_from_list (NULL_TREE, init);
5008 gcc_assert (TREE_CODE (init) == CONSTRUCTOR);
5009 DECL_INITIAL (decl) = init;
5010 DECL_INITIALIZED_P (decl) = 1;
5011 determine_visibility (decl);
5012 layout_var_decl (decl);
5013 maybe_commonize_var (decl);
5014 make_rtl_for_nonlocal_decl (decl, init, /*asmspec=*/NULL);
5017 /* Finish processing of a declaration;
5018 install its line number and initial value.
5019 If the length of an array type is not known before,
5020 it must be determined now, from the initial value, or it is an error.
5022 INIT is the initializer (if any) for DECL. If INIT_CONST_EXPR_P is
5023 true, then INIT is an integral constant expression.
5025 FLAGS is LOOKUP_ONLYCONVERTING if the = init syntax was used, else 0
5026 if the (init) syntax was used. */
5029 cp_finish_decl (tree decl, tree init, bool init_const_expr_p,
5030 tree asmspec_tree, int flags)
5034 const char *asmspec = NULL;
5035 int was_readonly = 0;
5036 bool var_definition_p = false;
5037 int saved_processing_template_decl;
5039 if (decl == error_mark_node)
5044 error ("assignment (not initialization) in declaration");
5048 gcc_assert (TREE_CODE (decl) != RESULT_DECL);
5049 /* Parameters are handled by store_parm_decls, not cp_finish_decl. */
5050 gcc_assert (TREE_CODE (decl) != PARM_DECL);
5052 type = TREE_TYPE (decl);
5053 if (type == error_mark_node)
5056 /* Assume no cleanup is required. */
5057 cleanup = NULL_TREE;
5058 saved_processing_template_decl = processing_template_decl;
5060 /* If a name was specified, get the string. */
5061 if (global_scope_p (current_binding_level))
5062 asmspec_tree = maybe_apply_renaming_pragma (decl, asmspec_tree);
5063 if (asmspec_tree && asmspec_tree != error_mark_node)
5064 asmspec = TREE_STRING_POINTER (asmspec_tree);
5066 if (current_class_type
5067 && CP_DECL_CONTEXT (decl) == current_class_type
5068 && TYPE_BEING_DEFINED (current_class_type)
5069 && (DECL_INITIAL (decl) || init))
5070 DECL_INITIALIZED_IN_CLASS_P (decl) = 1;
5072 if (processing_template_decl)
5074 bool type_dependent_p;
5076 /* Add this declaration to the statement-tree. */
5077 if (at_function_scope_p ())
5078 add_decl_expr (decl);
5080 type_dependent_p = dependent_type_p (type);
5082 if (init && init_const_expr_p)
5084 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (decl) = 1;
5085 if (DECL_INTEGRAL_CONSTANT_VAR_P (decl))
5086 TREE_CONSTANT (decl) = 1;
5090 || !DECL_CLASS_SCOPE_P (decl)
5091 || !DECL_INTEGRAL_CONSTANT_VAR_P (decl)
5093 || value_dependent_expression_p (init))
5096 DECL_INITIAL (decl) = init;
5097 if (TREE_CODE (decl) == VAR_DECL
5098 && !DECL_PRETTY_FUNCTION_P (decl)
5099 && !type_dependent_p)
5100 maybe_deduce_size_from_array_init (decl, init);
5104 init = fold_non_dependent_expr (init);
5105 processing_template_decl = 0;
5108 /* Take care of TYPE_DECLs up front. */
5109 if (TREE_CODE (decl) == TYPE_DECL)
5111 if (type != error_mark_node
5112 && IS_AGGR_TYPE (type) && DECL_NAME (decl))
5114 if (TREE_TYPE (DECL_NAME (decl)) && TREE_TYPE (decl) != type)
5115 warning (0, "shadowing previous type declaration of %q#D", decl);
5116 set_identifier_type_value (DECL_NAME (decl), decl);
5119 /* If we have installed this as the canonical typedef for this
5120 type, and that type has not been defined yet, delay emitting
5121 the debug information for it, as we will emit it later. */
5122 if (TYPE_MAIN_DECL (TREE_TYPE (decl)) == decl
5123 && !COMPLETE_TYPE_P (TREE_TYPE (decl)))
5124 TYPE_DECL_SUPPRESS_DEBUG (decl) = 1;
5126 rest_of_decl_compilation (decl, DECL_CONTEXT (decl) == NULL_TREE,
5131 /* A reference will be modified here, as it is initialized. */
5132 if (! DECL_EXTERNAL (decl)
5133 && TREE_READONLY (decl)
5134 && TREE_CODE (type) == REFERENCE_TYPE)
5137 TREE_READONLY (decl) = 0;
5140 if (TREE_CODE (decl) == VAR_DECL)
5142 /* Only PODs can have thread-local storage. Other types may require
5143 various kinds of non-trivial initialization. */
5144 if (DECL_THREAD_LOCAL_P (decl) && !pod_type_p (TREE_TYPE (decl)))
5145 error ("%qD cannot be thread-local because it has non-POD type %qT",
5146 decl, TREE_TYPE (decl));
5147 /* Convert the initializer to the type of DECL, if we have not
5148 already initialized DECL. */
5149 if (!DECL_INITIALIZED_P (decl)
5150 /* If !DECL_EXTERNAL then DECL is being defined. In the
5151 case of a static data member initialized inside the
5152 class-specifier, there can be an initializer even if DECL
5153 is *not* defined. */
5154 && (!DECL_EXTERNAL (decl) || init))
5158 DECL_NONTRIVIALLY_INITIALIZED_P (decl) = 1;
5159 if (init_const_expr_p)
5161 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (decl) = 1;
5162 if (DECL_INTEGRAL_CONSTANT_VAR_P (decl))
5163 TREE_CONSTANT (decl) = 1;
5166 init = check_initializer (decl, init, flags, &cleanup);
5167 /* Thread-local storage cannot be dynamically initialized. */
5168 if (DECL_THREAD_LOCAL_P (decl) && init)
5170 error ("%qD is thread-local and so cannot be dynamically "
5171 "initialized", decl);
5175 /* Check that the initializer for a static data member was a
5176 constant. Although we check in the parser that the
5177 initializer is an integral constant expression, we do not
5178 simplify division-by-zero at the point at which it
5179 occurs. Therefore, in:
5181 struct S { static const int i = 7 / 0; };
5183 we issue an error at this point. It would
5184 probably be better to forbid division by zero in
5185 integral constant expressions. */
5186 if (DECL_EXTERNAL (decl) && init)
5188 error ("%qD cannot be initialized by a non-constant expression"
5189 " when being declared", decl);
5190 DECL_INITIALIZED_IN_CLASS_P (decl) = 0;
5198 The memory occupied by any object of static storage
5199 duration is zero-initialized at program startup before
5200 any other initialization takes place.
5202 We cannot create an appropriate initializer until after
5203 the type of DECL is finalized. If DECL_INITIAL is set,
5204 then the DECL is statically initialized, and any
5205 necessary zero-initialization has already been performed. */
5206 if (TREE_STATIC (decl) && !DECL_INITIAL (decl))
5207 DECL_INITIAL (decl) = build_zero_init (TREE_TYPE (decl),
5208 /*nelts=*/NULL_TREE,
5209 /*static_storage_p=*/true);
5210 /* Remember that the initialization for this variable has
5212 DECL_INITIALIZED_P (decl) = 1;
5213 /* This declaration is the definition of this variable,
5214 unless we are initializing a static data member within
5215 the class specifier. */
5216 if (!DECL_EXTERNAL (decl))
5217 var_definition_p = true;
5219 /* If the variable has an array type, lay out the type, even if
5220 there is no initializer. It is valid to index through the
5221 array, and we must get TYPE_ALIGN set correctly on the array
5223 else if (TREE_CODE (type) == ARRAY_TYPE)
5227 /* Add this declaration to the statement-tree. This needs to happen
5228 after the call to check_initializer so that the DECL_EXPR for a
5229 reference temp is added before the DECL_EXPR for the reference itself. */
5230 if (at_function_scope_p ())
5231 add_decl_expr (decl);
5233 /* Let the middle end know about variables and functions -- but not
5234 static data members in uninstantiated class templates. */
5235 if (!saved_processing_template_decl
5236 && (TREE_CODE (decl) == VAR_DECL
5237 || TREE_CODE (decl) == FUNCTION_DECL))
5239 if (TREE_CODE (decl) == VAR_DECL)
5241 layout_var_decl (decl);
5242 maybe_commonize_var (decl);
5245 make_rtl_for_nonlocal_decl (decl, init, asmspec);
5247 /* Check for abstractness of the type. Notice that there is no
5248 need to strip array types here since the check for those types
5249 is already done within create_array_type_for_decl. */
5250 if (TREE_CODE (type) == FUNCTION_TYPE
5251 || TREE_CODE (type) == METHOD_TYPE)
5252 abstract_virtuals_error (decl, TREE_TYPE (type));
5254 abstract_virtuals_error (decl, type);
5256 /* This needs to happen after the linkage is set. */
5257 determine_visibility (decl);
5259 if (TREE_CODE (decl) == FUNCTION_DECL
5260 || TREE_TYPE (decl) == error_mark_node)
5261 /* No initialization required. */
5263 else if (DECL_EXTERNAL (decl)
5264 && ! (DECL_LANG_SPECIFIC (decl)
5265 && DECL_NOT_REALLY_EXTERN (decl)))
5268 DECL_INITIAL (decl) = init;
5272 /* A variable definition. */
5273 if (DECL_FUNCTION_SCOPE_P (decl))
5275 /* Initialize the local variable. */
5276 if (processing_template_decl)
5277 DECL_INITIAL (decl) = init;
5278 else if (!TREE_STATIC (decl))
5279 initialize_local_var (decl, init);
5282 /* If a variable is defined, and then a subsequent
5283 definition with external linkage is encountered, we will
5284 get here twice for the same variable. We want to avoid
5285 calling expand_static_init more than once. For variables
5286 that are not static data members, we can call
5287 expand_static_init only when we actually process the
5288 initializer. It is not legal to redeclare a static data
5289 member, so this issue does not arise in that case. */
5290 if (var_definition_p && TREE_STATIC (decl))
5291 expand_static_init (decl, init);
5295 /* If a CLEANUP_STMT was created to destroy a temporary bound to a
5296 reference, insert it in the statement-tree now. */
5298 push_cleanup (decl, cleanup, false);
5301 processing_template_decl = saved_processing_template_decl;
5304 TREE_READONLY (decl) = 1;
5306 /* If this was marked 'used', be sure it will be output. */
5307 if (lookup_attribute ("used", DECL_ATTRIBUTES (decl)))
5308 mark_decl_referenced (decl);
5311 /* This is here for a midend callback from c-common.c. */
5314 finish_decl (tree decl, tree init, tree asmspec_tree)
5316 cp_finish_decl (decl, init, /*init_const_expr_p=*/false, asmspec_tree, 0);
5319 /* Returns a declaration for a VAR_DECL as if:
5321 extern "C" TYPE NAME;
5323 had been seen. Used to create compiler-generated global
5327 declare_global_var (tree name, tree type)
5331 push_to_top_level ();
5332 decl = build_decl (VAR_DECL, name, type);
5333 TREE_PUBLIC (decl) = 1;
5334 DECL_EXTERNAL (decl) = 1;
5335 DECL_ARTIFICIAL (decl) = 1;
5336 /* If the user has explicitly declared this variable (perhaps
5337 because the code we are compiling is part of a low-level runtime
5338 library), then it is possible that our declaration will be merged
5339 with theirs by pushdecl. */
5340 decl = pushdecl (decl);
5341 finish_decl (decl, NULL_TREE, NULL_TREE);
5342 pop_from_top_level ();
5347 /* Returns a pointer to the `atexit' function. Note that if
5348 FLAG_USE_CXA_ATEXIT is nonzero, then this will actually be the new
5349 `__cxa_atexit' function specified in the IA64 C++ ABI. */
5352 get_atexit_node (void)
5359 bool use_aeabi_atexit;
5364 if (flag_use_cxa_atexit)
5366 /* The declaration for `__cxa_atexit' is:
5368 int __cxa_atexit (void (*)(void *), void *, void *)
5370 We build up the argument types and then then function type
5373 use_aeabi_atexit = targetm.cxx.use_aeabi_atexit ();
5374 /* First, build the pointer-to-function type for the first
5376 arg_types = tree_cons (NULL_TREE, ptr_type_node, void_list_node);
5377 fn_type = build_function_type (void_type_node, arg_types);
5378 fn_ptr_type = build_pointer_type (fn_type);
5379 /* Then, build the rest of the argument types. */
5380 arg_types = tree_cons (NULL_TREE, ptr_type_node, void_list_node);
5381 if (use_aeabi_atexit)
5383 arg_types = tree_cons (NULL_TREE, fn_ptr_type, arg_types);
5384 arg_types = tree_cons (NULL_TREE, ptr_type_node, arg_types);
5388 arg_types = tree_cons (NULL_TREE, ptr_type_node, arg_types);
5389 arg_types = tree_cons (NULL_TREE, fn_ptr_type, arg_types);
5391 /* And the final __cxa_atexit type. */
5392 fn_type = build_function_type (integer_type_node, arg_types);
5393 fn_ptr_type = build_pointer_type (fn_type);
5394 if (use_aeabi_atexit)
5395 name = "__aeabi_atexit";
5397 name = "__cxa_atexit";
5401 /* The declaration for `atexit' is:
5403 int atexit (void (*)());
5405 We build up the argument types and then then function type
5407 fn_type = build_function_type (void_type_node, void_list_node);
5408 fn_ptr_type = build_pointer_type (fn_type);
5409 arg_types = tree_cons (NULL_TREE, fn_ptr_type, void_list_node);
5410 /* Build the final atexit type. */
5411 fn_type = build_function_type (integer_type_node, arg_types);
5415 /* Now, build the function declaration. */
5416 push_lang_context (lang_name_c);
5417 atexit_fndecl = build_library_fn_ptr (name, fn_type);
5418 mark_used (atexit_fndecl);
5419 pop_lang_context ();
5420 atexit_node = decay_conversion (atexit_fndecl);
5425 /* Returns the __dso_handle VAR_DECL. */
5428 get_dso_handle_node (void)
5430 if (dso_handle_node)
5431 return dso_handle_node;
5433 /* Declare the variable. */
5434 dso_handle_node = declare_global_var (get_identifier ("__dso_handle"),
5437 return dso_handle_node;
5440 /* Begin a new function with internal linkage whose job will be simply
5441 to destroy some particular variable. */
5443 static GTY(()) int start_cleanup_cnt;
5446 start_cleanup_fn (void)
5453 push_to_top_level ();
5455 /* No need to mangle this. */
5456 push_lang_context (lang_name_c);
5458 /* Build the parameter-types. */
5459 parmtypes = void_list_node;
5460 /* Functions passed to __cxa_atexit take an additional parameter.
5461 We'll just ignore it. After we implement the new calling
5462 convention for destructors, we can eliminate the use of
5463 additional cleanup functions entirely in the -fnew-abi case. */
5464 if (flag_use_cxa_atexit)
5465 parmtypes = tree_cons (NULL_TREE, ptr_type_node, parmtypes);
5466 /* Build the function type itself. */
5467 fntype = build_function_type (void_type_node, parmtypes);
5468 /* Build the name of the function. */
5469 sprintf (name, "__tcf_%d", start_cleanup_cnt++);
5470 /* Build the function declaration. */
5471 fndecl = build_lang_decl (FUNCTION_DECL, get_identifier (name), fntype);
5472 /* It's a function with internal linkage, generated by the
5474 TREE_PUBLIC (fndecl) = 0;
5475 DECL_ARTIFICIAL (fndecl) = 1;
5476 /* Make the function `inline' so that it is only emitted if it is
5477 actually needed. It is unlikely that it will be inlined, since
5478 it is only called via a function pointer, but we avoid unnecessary
5479 emissions this way. */
5480 DECL_INLINE (fndecl) = 1;
5481 DECL_DECLARED_INLINE_P (fndecl) = 1;
5482 DECL_INTERFACE_KNOWN (fndecl) = 1;
5483 /* Build the parameter. */
5484 if (flag_use_cxa_atexit)
5488 parmdecl = cp_build_parm_decl (NULL_TREE, ptr_type_node);
5489 DECL_CONTEXT (parmdecl) = fndecl;
5490 TREE_USED (parmdecl) = 1;
5491 DECL_ARGUMENTS (fndecl) = parmdecl;
5495 start_preparsed_function (fndecl, NULL_TREE, SF_PRE_PARSED);
5497 pop_lang_context ();
5499 return current_function_decl;
5502 /* Finish the cleanup function begun by start_cleanup_fn. */
5505 end_cleanup_fn (void)
5507 expand_or_defer_fn (finish_function (0));
5509 pop_from_top_level ();
5512 /* Generate code to handle the destruction of DECL, an object with
5513 static storage duration. */
5516 register_dtor_fn (tree decl)
5523 if (TYPE_HAS_TRIVIAL_DESTRUCTOR (TREE_TYPE (decl)))
5524 return void_zero_node;
5526 /* Call build_cleanup before we enter the anonymous function so that
5527 any access checks will be done relative to the current scope,
5528 rather than the scope of the anonymous function. */
5529 build_cleanup (decl);
5531 /* Now start the function. */
5532 cleanup = start_cleanup_fn ();
5534 /* Now, recompute the cleanup. It may contain SAVE_EXPRs that refer
5535 to the original function, rather than the anonymous one. That
5536 will make the back-end think that nested functions are in use,
5537 which causes confusion. */
5539 push_deferring_access_checks (dk_no_check);
5540 fcall = build_cleanup (decl);
5541 pop_deferring_access_checks ();
5543 /* Create the body of the anonymous function. */
5544 compound_stmt = begin_compound_stmt (BCS_FN_BODY);
5545 finish_expr_stmt (fcall);
5546 finish_compound_stmt (compound_stmt);
5549 /* Call atexit with the cleanup function. */
5550 cxx_mark_addressable (cleanup);
5551 mark_used (cleanup);
5552 cleanup = build_unary_op (ADDR_EXPR, cleanup, 0);
5553 if (flag_use_cxa_atexit)
5555 args = tree_cons (NULL_TREE,
5556 build_unary_op (ADDR_EXPR, get_dso_handle_node (), 0),
5558 if (targetm.cxx.use_aeabi_atexit ())
5560 args = tree_cons (NULL_TREE, cleanup, args);
5561 args = tree_cons (NULL_TREE, null_pointer_node, args);
5565 args = tree_cons (NULL_TREE, null_pointer_node, args);
5566 args = tree_cons (NULL_TREE, cleanup, args);
5570 args = tree_cons (NULL_TREE, cleanup, NULL_TREE);
5571 return build_function_call (get_atexit_node (), args);
5574 /* DECL is a VAR_DECL with static storage duration. INIT, if present,
5575 is its initializer. Generate code to handle the construction
5576 and destruction of DECL. */
5579 expand_static_init (tree decl, tree init)
5581 gcc_assert (TREE_CODE (decl) == VAR_DECL);
5582 gcc_assert (TREE_STATIC (decl));
5584 /* Some variables require no initialization. */
5586 && !TYPE_NEEDS_CONSTRUCTING (TREE_TYPE (decl))
5587 && TYPE_HAS_TRIVIAL_DESTRUCTOR (TREE_TYPE (decl)))
5590 if (DECL_FUNCTION_SCOPE_P (decl))
5592 /* Emit code to perform this initialization but once. */
5593 tree if_stmt = NULL_TREE, inner_if_stmt = NULL_TREE;
5594 tree then_clause = NULL_TREE, inner_then_clause = NULL_TREE;
5595 tree guard, guard_addr, guard_addr_list;
5596 tree acquire_fn, release_fn, abort_fn;
5599 /* Emit code to perform this initialization but once. This code
5602 static <type> guard;
5603 if (!guard.first_byte) {
5604 if (__cxa_guard_acquire (&guard)) {
5607 // Do initialization.
5608 flag = true; __cxa_guard_release (&guard);
5609 // Register variable for destruction at end of program.
5611 if (!flag) __cxa_guard_abort (&guard);
5615 Note that the `flag' variable is only set to 1 *after* the
5616 initialization is complete. This ensures that an exception,
5617 thrown during the construction, will cause the variable to
5618 reinitialized when we pass through this code again, as per:
5622 If the initialization exits by throwing an exception, the
5623 initialization is not complete, so it will be tried again
5624 the next time control enters the declaration.
5626 This process should be thread-safe, too; multiple threads
5627 should not be able to initialize the variable more than
5630 /* Create the guard variable. */
5631 guard = get_guard (decl);
5633 /* This optimization isn't safe on targets with relaxed memory
5634 consistency. On such targets we force synchronization in
5635 __cxa_guard_acquire. */
5636 if (!targetm.relaxed_ordering || !flag_threadsafe_statics)
5638 /* Begin the conditional initialization. */
5639 if_stmt = begin_if_stmt ();
5640 finish_if_stmt_cond (get_guard_cond (guard), if_stmt);
5641 then_clause = begin_compound_stmt (BCS_NO_SCOPE);
5644 if (flag_threadsafe_statics)
5646 guard_addr = build_address (guard);
5647 guard_addr_list = build_tree_list (NULL_TREE, guard_addr);
5649 acquire_fn = get_identifier ("__cxa_guard_acquire");
5650 release_fn = get_identifier ("__cxa_guard_release");
5651 abort_fn = get_identifier ("__cxa_guard_abort");
5652 if (!get_global_value_if_present (acquire_fn, &acquire_fn))
5654 tree argtypes = tree_cons (NULL_TREE, TREE_TYPE (guard_addr),
5656 tree vfntype = build_function_type (void_type_node, argtypes);
5657 acquire_fn = push_library_fn
5658 (acquire_fn, build_function_type (integer_type_node, argtypes));
5659 release_fn = push_library_fn (release_fn, vfntype);
5660 abort_fn = push_library_fn (abort_fn, vfntype);
5664 release_fn = identifier_global_value (release_fn);
5665 abort_fn = identifier_global_value (abort_fn);
5668 inner_if_stmt = begin_if_stmt ();
5669 finish_if_stmt_cond (build_call (acquire_fn, guard_addr_list),
5672 inner_then_clause = begin_compound_stmt (BCS_NO_SCOPE);
5673 begin = get_target_expr (boolean_false_node);
5674 flag = TARGET_EXPR_SLOT (begin);
5676 TARGET_EXPR_CLEANUP (begin)
5677 = build3 (COND_EXPR, void_type_node, flag,
5679 build_call (abort_fn, guard_addr_list));
5680 CLEANUP_EH_ONLY (begin) = 1;
5682 /* Do the initialization itself. */
5683 init = add_stmt_to_compound (begin, init);
5684 init = add_stmt_to_compound
5685 (init, build2 (MODIFY_EXPR, void_type_node, flag, boolean_true_node));
5686 init = add_stmt_to_compound
5687 (init, build_call (release_fn, guard_addr_list));
5690 init = add_stmt_to_compound (init, set_guard (guard));
5692 /* Use atexit to register a function for destroying this static
5694 init = add_stmt_to_compound (init, register_dtor_fn (decl));
5696 finish_expr_stmt (init);
5698 if (flag_threadsafe_statics)
5700 finish_compound_stmt (inner_then_clause);
5701 finish_then_clause (inner_if_stmt);
5702 finish_if_stmt (inner_if_stmt);
5705 if (!targetm.relaxed_ordering || !flag_threadsafe_statics)
5707 finish_compound_stmt (then_clause);
5708 finish_then_clause (if_stmt);
5709 finish_if_stmt (if_stmt);
5713 static_aggregates = tree_cons (init, decl, static_aggregates);
5717 /* Make TYPE a complete type based on INITIAL_VALUE.
5718 Return 0 if successful, 1 if INITIAL_VALUE can't be deciphered,
5719 2 if there was no information (in which case assume 0 if DO_DEFAULT),
5720 3 if the initializer list is empty (in pedantic mode). */
5723 cp_complete_array_type (tree *ptype, tree initial_value, bool do_default)
5726 tree type, elt_type;
5730 /* An array of character type can be initialized from a
5731 brace-enclosed string constant.
5733 FIXME: this code is duplicated from reshape_init. Probably
5734 we should just call reshape_init here? */
5735 if (char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (*ptype)))
5736 && TREE_CODE (initial_value) == CONSTRUCTOR
5737 && !VEC_empty (constructor_elt, CONSTRUCTOR_ELTS (initial_value)))
5739 VEC(constructor_elt,gc) *v = CONSTRUCTOR_ELTS (initial_value);
5740 tree value = VEC_index (constructor_elt, v, 0)->value;
5742 if (TREE_CODE (value) == STRING_CST
5743 && VEC_length (constructor_elt, v) == 1)
5744 initial_value = value;
5748 failure = complete_array_type (ptype, initial_value, do_default);
5750 /* We can create the array before the element type is complete, which
5751 means that we didn't have these two bits set in the original type
5752 either. In completing the type, we are expected to propagate these
5753 bits. See also complete_type which does the same thing for arrays
5756 if (TYPE_DOMAIN (type))
5758 elt_type = TREE_TYPE (type);
5759 TYPE_NEEDS_CONSTRUCTING (type) = TYPE_NEEDS_CONSTRUCTING (elt_type);
5760 TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type)
5761 = TYPE_HAS_NONTRIVIAL_DESTRUCTOR (elt_type);
5767 /* Return zero if something is declared to be a member of type
5768 CTYPE when in the context of CUR_TYPE. STRING is the error
5769 message to print in that case. Otherwise, quietly return 1. */
5772 member_function_or_else (tree ctype, tree cur_type, enum overload_flags flags)
5774 if (ctype && ctype != cur_type)
5776 if (flags == DTOR_FLAG)
5777 error ("destructor for alien class %qT cannot be a member", ctype);
5779 error ("constructor for alien class %qT cannot be a member", ctype);
5785 /* Subroutine of `grokdeclarator'. */
5787 /* Generate errors possibly applicable for a given set of specifiers.
5788 This is for ARM $7.1.2. */
5791 bad_specifiers (tree object,
5800 error ("%qD declared as a %<virtual%> %s", object, type);
5802 error ("%qD declared as an %<inline%> %s", object, type);
5804 error ("%<const%> and %<volatile%> function specifiers on "
5805 "%qD invalid in %s declaration",
5808 error ("%q+D declared as a friend", object);
5810 && (TREE_CODE (object) == TYPE_DECL
5811 || (!TYPE_PTRFN_P (TREE_TYPE (object))
5812 && !TYPE_REFFN_P (TREE_TYPE (object))
5813 && !TYPE_PTRMEMFUNC_P (TREE_TYPE (object)))))
5814 error ("%q+D declared with an exception specification", object);
5817 /* DECL is a member function or static data member and is presently
5818 being defined. Check that the definition is taking place in a
5822 check_class_member_definition_namespace (tree decl)
5824 /* These checks only apply to member functions and static data
5826 gcc_assert (TREE_CODE (decl) == FUNCTION_DECL
5827 || TREE_CODE (decl) == VAR_DECL);
5828 /* We check for problems with specializations in pt.c in
5829 check_specialization_namespace, where we can issue better
5831 if (processing_specialization)
5833 /* There are no restrictions on the placement of
5834 explicit instantiations. */
5835 if (processing_explicit_instantiation)
5839 A member function definition that appears outside of the
5840 class definition shall appear in a namespace scope enclosing
5841 the class definition.
5845 The definition for a static data member shall appear in a
5846 namespace scope enclosing the member's class definition. */
5847 if (!is_ancestor (current_namespace, DECL_CONTEXT (decl)))
5848 pedwarn ("definition of %qD is not in namespace enclosing %qT",
5849 decl, DECL_CONTEXT (decl));
5852 /* Build a PARM_DECL for the "this" parameter. TYPE is the
5853 METHOD_TYPE for a non-static member function; QUALS are the
5854 cv-qualifiers that apply to the function. */
5857 build_this_parm (tree type, cp_cv_quals quals)
5862 cp_cv_quals this_quals;
5864 this_type = TREE_VALUE (TYPE_ARG_TYPES (type));
5865 /* The `this' parameter is implicitly `const'; it cannot be
5867 this_quals = (quals & TYPE_QUAL_RESTRICT) | TYPE_QUAL_CONST;
5868 qual_type = cp_build_qualified_type (this_type, this_quals);
5869 parm = build_artificial_parm (this_identifier, qual_type);
5870 cp_apply_type_quals_to_decl (this_quals, parm);
5874 /* CTYPE is class type, or null if non-class.
5875 TYPE is type this FUNCTION_DECL should have, either FUNCTION_TYPE
5877 DECLARATOR is the function's name.
5878 PARMS is a chain of PARM_DECLs for the function.
5879 VIRTUALP is truthvalue of whether the function is virtual or not.
5880 FLAGS are to be passed through to `grokclassfn'.
5881 QUALS are qualifiers indicating whether the function is `const'
5883 RAISES is a list of exceptions that this function can raise.
5884 CHECK is 1 if we must find this method in CTYPE, 0 if we should
5885 not look, and -1 if we should not call `grokclassfn' at all.
5887 SFK is the kind of special function (if any) for the new function.
5889 Returns `NULL_TREE' if something goes wrong, after issuing
5890 applicable error messages. */
5893 grokfndecl (tree ctype,
5897 tree orig_declarator,
5899 enum overload_flags flags,
5906 special_function_kind sfk,
5913 int staticp = ctype && TREE_CODE (type) == FUNCTION_TYPE;
5917 type = build_exception_variant (type, raises);
5919 decl = build_lang_decl (FUNCTION_DECL, declarator, type);
5920 if (TREE_CODE (type) == METHOD_TYPE)
5923 parm = build_this_parm (type, quals);
5924 TREE_CHAIN (parm) = parms;
5927 DECL_ARGUMENTS (decl) = parms;
5928 /* Propagate volatile out from type to decl. */
5929 if (TYPE_VOLATILE (type))
5930 TREE_THIS_VOLATILE (decl) = 1;
5933 && TREE_CODE (orig_declarator) == TEMPLATE_ID_EXPR)
5937 ("defining explicit specialization %qD in friend declaration",
5941 tree fns = TREE_OPERAND (orig_declarator, 0);
5942 tree args = TREE_OPERAND (orig_declarator, 1);
5944 if (PROCESSING_REAL_TEMPLATE_DECL_P ())
5946 /* Something like `template <class T> friend void f<T>()'. */
5947 error ("invalid use of template-id %qD in declaration "
5948 "of primary template",
5954 /* A friend declaration of the form friend void f<>(). Record
5955 the information in the TEMPLATE_ID_EXPR. */
5956 SET_DECL_IMPLICIT_INSTANTIATION (decl);
5958 if (TREE_CODE (fns) == COMPONENT_REF)
5960 /* Due to bison parser ickiness, we will have already looked
5961 up an operator_name or PFUNCNAME within the current class
5962 (see template_id in parse.y). If the current class contains
5963 such a name, we'll get a COMPONENT_REF here. Undo that. */
5965 gcc_assert (TREE_TYPE (TREE_OPERAND (fns, 0))
5966 == current_class_type);
5967 fns = TREE_OPERAND (fns, 1);
5969 gcc_assert (TREE_CODE (fns) == IDENTIFIER_NODE
5970 || TREE_CODE (fns) == OVERLOAD);
5971 DECL_TEMPLATE_INFO (decl) = tree_cons (fns, args, NULL_TREE);
5973 for (t = TYPE_ARG_TYPES (TREE_TYPE (decl)); t; t = TREE_CHAIN (t))
5974 if (TREE_PURPOSE (t)
5975 && TREE_CODE (TREE_PURPOSE (t)) == DEFAULT_ARG)
5977 error ("default arguments are not allowed in declaration "
5978 "of friend template specialization %qD",
5985 error ("%<inline%> is not allowed in declaration of friend "
5986 "template specialization %qD",
5993 /* If this decl has namespace scope, set that up. */
5995 set_decl_namespace (decl, in_namespace, friendp);
5997 DECL_CONTEXT (decl) = FROB_CONTEXT (current_namespace);
5999 /* `main' and builtins have implicit 'C' linkage. */
6000 if ((MAIN_NAME_P (declarator)
6001 || (IDENTIFIER_LENGTH (declarator) > 10
6002 && IDENTIFIER_POINTER (declarator)[0] == '_'
6003 && IDENTIFIER_POINTER (declarator)[1] == '_'
6004 && strncmp (IDENTIFIER_POINTER (declarator)+2, "builtin_", 8) == 0))
6005 && current_lang_name == lang_name_cplusplus
6006 && ctype == NULL_TREE
6007 /* NULL_TREE means global namespace. */
6008 && DECL_CONTEXT (decl) == NULL_TREE)
6009 SET_DECL_LANGUAGE (decl, lang_c);
6011 /* Should probably propagate const out from type to decl I bet (mrs). */
6014 DECL_STATIC_FUNCTION_P (decl) = 1;
6015 DECL_CONTEXT (decl) = ctype;
6020 DECL_CONTEXT (decl) = ctype;
6022 check_class_member_definition_namespace (decl);
6025 if (ctype == NULL_TREE && DECL_MAIN_P (decl))
6027 if (processing_template_decl)
6028 error ("cannot declare %<::main%> to be a template");
6030 error ("cannot declare %<::main%> to be inline");
6032 error ("cannot declare %<::main%> to be static");
6033 if (!same_type_p (TREE_TYPE (TREE_TYPE (decl)),
6036 tree oldtypeargs = TYPE_ARG_TYPES (TREE_TYPE (decl));
6038 error ("%<::main%> must return %<int%>");
6039 newtype = build_function_type (integer_type_node,
6041 TREE_TYPE (decl) = newtype;
6047 /* Members of anonymous types and local classes have no linkage; make
6048 them internal. If a typedef is made later, this will be changed. */
6049 if (ctype && (TYPE_ANONYMOUS_P (ctype)
6050 || decl_function_context (TYPE_MAIN_DECL (ctype))))
6055 /* [basic.link]: A name with no linkage (notably, the name of a class
6056 or enumeration declared in a local scope) shall not be used to
6057 declare an entity with linkage.
6059 Only check this for public decls for now. See core 319, 389. */
6060 t = no_linkage_check (TREE_TYPE (decl),
6061 /*relaxed_p=*/false);
6064 if (TYPE_ANONYMOUS_P (t))
6066 if (DECL_EXTERN_C_P (decl))
6067 /* Allow this; it's pretty common in C. */;
6070 pedwarn ("non-local function %q#D uses anonymous type",
6072 if (DECL_ORIGINAL_TYPE (TYPE_NAME (t)))
6073 pedwarn ("%q+#D does not refer to the unqualified "
6074 "type, so it is not used for linkage",
6079 pedwarn ("non-local function %q#D uses local type %qT", decl, t);
6083 TREE_PUBLIC (decl) = publicp;
6086 DECL_INTERFACE_KNOWN (decl) = 1;
6087 DECL_NOT_REALLY_EXTERN (decl) = 1;
6090 /* If the declaration was declared inline, mark it as such. */
6092 DECL_DECLARED_INLINE_P (decl) = 1;
6093 /* We inline functions that are explicitly declared inline, or, when
6094 the user explicitly asks us to, all functions. */
6095 if (DECL_DECLARED_INLINE_P (decl)
6096 || (flag_inline_trees == 2 && !DECL_INLINE (decl) && funcdef_flag))
6097 DECL_INLINE (decl) = 1;
6099 DECL_EXTERNAL (decl) = 1;
6100 if (quals && TREE_CODE (type) == FUNCTION_TYPE)
6102 error ("%smember function %qD cannot have cv-qualifier",
6103 (ctype ? "static " : "non-"), decl);
6104 quals = TYPE_UNQUALIFIED;
6107 if (IDENTIFIER_OPNAME_P (DECL_NAME (decl)))
6108 grok_op_properties (decl, /*complain=*/true);
6110 if (ctype && decl_function_context (decl))
6111 DECL_NO_STATIC_CHAIN (decl) = 1;
6114 /* Make the init_value nonzero so pushdecl knows this is not
6115 tentative. error_mark_node is replaced later with the BLOCK. */
6116 DECL_INITIAL (decl) = error_mark_node;
6118 if (TYPE_NOTHROW_P (type) || nothrow_libfn_p (decl))
6119 TREE_NOTHROW (decl) = 1;
6121 /* Caller will do the rest of this. */
6125 if (ctype != NULL_TREE)
6127 if (sfk == sfk_constructor)
6128 DECL_CONSTRUCTOR_P (decl) = 1;
6130 grokclassfn (ctype, decl, flags);
6133 decl = check_explicit_specialization (orig_declarator, decl,
6136 4 * (friendp != 0));
6137 if (decl == error_mark_node)
6142 cplus_decl_attributes (&decl, *attrlist, 0);
6143 *attrlist = NULL_TREE;
6146 if (ctype != NULL_TREE
6147 && (! TYPE_FOR_JAVA (ctype) || check_java_method (decl))
6152 old_decl = check_classfn (ctype, decl,
6153 (processing_template_decl
6154 > template_class_depth (ctype))
6155 ? current_template_parms
6162 if (TREE_CODE (old_decl) == TEMPLATE_DECL)
6163 /* Because grokfndecl is always supposed to return a
6164 FUNCTION_DECL, we pull out the DECL_TEMPLATE_RESULT
6165 here. We depend on our callers to figure out that its
6166 really a template that's being returned. */
6167 old_decl = DECL_TEMPLATE_RESULT (old_decl);
6169 if (DECL_STATIC_FUNCTION_P (old_decl)
6170 && TREE_CODE (TREE_TYPE (decl)) == METHOD_TYPE)
6171 /* Remove the `this' parm added by grokclassfn.
6172 XXX Isn't this done in start_function, too? */
6173 revert_static_member_fn (decl);
6174 if (DECL_ARTIFICIAL (old_decl))
6175 error ("definition of implicitly-declared %qD", old_decl);
6177 /* Since we've smashed OLD_DECL to its
6178 DECL_TEMPLATE_RESULT, we must do the same to DECL. */
6179 if (TREE_CODE (decl) == TEMPLATE_DECL)
6180 decl = DECL_TEMPLATE_RESULT (decl);
6182 /* Attempt to merge the declarations. This can fail, in
6183 the case of some invalid specialization declarations. */
6184 pushed_scope = push_scope (ctype);
6185 ok = duplicate_decls (decl, old_decl, friendp);
6187 pop_scope (pushed_scope);
6190 error ("no %q#D member function declared in class %qT",
6198 if (DECL_CONSTRUCTOR_P (decl) && !grok_ctor_properties (ctype, decl))
6201 if (ctype == NULL_TREE || check)
6205 DECL_VIRTUAL_P (decl) = 1;
6210 /* DECL is a VAR_DECL for a static data member. Set flags to reflect
6211 the linkage that DECL will receive in the object file. */
6214 set_linkage_for_static_data_member (tree decl)
6216 /* A static data member always has static storage duration and
6217 external linkage. Note that static data members are forbidden in
6218 local classes -- the only situation in which a class has
6219 non-external linkage. */
6220 TREE_PUBLIC (decl) = 1;
6221 TREE_STATIC (decl) = 1;
6222 /* For non-template classes, static data members are always put
6223 out in exactly those files where they are defined, just as
6224 with ordinary namespace-scope variables. */
6225 if (!processing_template_decl)
6226 DECL_INTERFACE_KNOWN (decl) = 1;
6229 /* Create a VAR_DECL named NAME with the indicated TYPE.
6231 If SCOPE is non-NULL, it is the class type or namespace containing
6232 the variable. If SCOPE is NULL, the variable should is created in
6233 the innermost enclosings scope. */
6236 grokvardecl (tree type,
6238 const cp_decl_specifier_seq *declspecs,
6244 tree explicit_scope;
6246 gcc_assert (!name || TREE_CODE (name) == IDENTIFIER_NODE);
6248 /* Compute the scope in which to place the variable, but remember
6249 whether or not that scope was explicitly specified by the user. */
6250 explicit_scope = scope;
6253 /* An explicit "extern" specifier indicates a namespace-scope
6255 if (declspecs->storage_class == sc_extern)
6256 scope = current_namespace;
6257 else if (!at_function_scope_p ())
6258 scope = current_scope ();
6262 && (/* If the variable is a namespace-scope variable declared in a
6263 template, we need DECL_LANG_SPECIFIC. */
6264 (TREE_CODE (scope) == NAMESPACE_DECL && processing_template_decl)
6265 /* Similarly for namespace-scope variables with language linkage
6267 || (TREE_CODE (scope) == NAMESPACE_DECL
6268 && current_lang_name != lang_name_cplusplus)
6269 /* Similarly for static data members. */
6271 decl = build_lang_decl (VAR_DECL, name, type);
6273 decl = build_decl (VAR_DECL, name, type);
6275 if (explicit_scope && TREE_CODE (explicit_scope) == NAMESPACE_DECL)
6276 set_decl_namespace (decl, explicit_scope, 0);
6278 DECL_CONTEXT (decl) = scope;
6280 if (declspecs->storage_class == sc_extern)
6282 DECL_THIS_EXTERN (decl) = 1;
6283 DECL_EXTERNAL (decl) = !initialized;
6286 if (DECL_CLASS_SCOPE_P (decl))
6288 set_linkage_for_static_data_member (decl);
6289 /* This function is only called with out-of-class definitions. */
6290 DECL_EXTERNAL (decl) = 0;
6291 check_class_member_definition_namespace (decl);
6293 /* At top level, either `static' or no s.c. makes a definition
6294 (perhaps tentative), and absence of `static' makes it public. */
6295 else if (toplevel_bindings_p ())
6297 TREE_PUBLIC (decl) = (declspecs->storage_class != sc_static
6298 && (DECL_THIS_EXTERN (decl) || ! constp));
6299 TREE_STATIC (decl) = ! DECL_EXTERNAL (decl);
6301 /* Not at top level, only `static' makes a static definition. */
6304 TREE_STATIC (decl) = declspecs->storage_class == sc_static;
6305 TREE_PUBLIC (decl) = DECL_EXTERNAL (decl);
6308 if (declspecs->specs[(int)ds_thread])
6310 if (targetm.have_tls)
6311 DECL_TLS_MODEL (decl) = decl_default_tls_model (decl);
6313 /* A mere warning is sure to result in improper semantics
6314 at runtime. Don't bother to allow this to compile. */
6315 error ("thread-local storage not supported for this target");
6318 if (TREE_PUBLIC (decl))
6320 /* [basic.link]: A name with no linkage (notably, the name of a class
6321 or enumeration declared in a local scope) shall not be used to
6322 declare an entity with linkage.
6324 Only check this for public decls for now. */
6325 tree t = no_linkage_check (TREE_TYPE (decl), /*relaxed_p=*/false);
6328 if (TYPE_ANONYMOUS_P (t))
6330 if (DECL_EXTERN_C_P (decl))
6331 /* Allow this; it's pretty common in C. */
6335 /* DRs 132, 319 and 389 seem to indicate types with
6336 no linkage can only be used to declare extern "C"
6337 entities. Since it's not always an error in the
6338 ISO C++ 90 Standard, we only issue a warning. */
6339 warning (0, "non-local variable %q#D uses anonymous type",
6341 if (DECL_ORIGINAL_TYPE (TYPE_NAME (t)))
6342 warning (0, "%q+#D does not refer to the unqualified "
6343 "type, so it is not used for linkage",
6348 warning (0, "non-local variable %q#D uses local type %qT", decl, t);
6352 DECL_INTERFACE_KNOWN (decl) = 1;
6357 /* Create and return a canonical pointer to member function type, for
6358 TYPE, which is a POINTER_TYPE to a METHOD_TYPE. */
6361 build_ptrmemfunc_type (tree type)
6365 tree unqualified_variant = NULL_TREE;
6367 if (type == error_mark_node)
6370 /* If a canonical type already exists for this type, use it. We use
6371 this method instead of type_hash_canon, because it only does a
6372 simple equality check on the list of field members. */
6374 if ((t = TYPE_GET_PTRMEMFUNC_TYPE (type)))
6377 /* Make sure that we always have the unqualified pointer-to-member
6379 if (cp_type_quals (type) != TYPE_UNQUALIFIED)
6381 = build_ptrmemfunc_type (TYPE_MAIN_VARIANT (type));
6383 t = make_aggr_type (RECORD_TYPE);
6384 xref_basetypes (t, NULL_TREE);
6386 /* Let the front-end know this is a pointer to member function... */
6387 TYPE_PTRMEMFUNC_FLAG (t) = 1;
6388 /* ... and not really an aggregate. */
6389 SET_IS_AGGR_TYPE (t, 0);
6391 field = build_decl (FIELD_DECL, pfn_identifier, type);
6394 field = build_decl (FIELD_DECL, delta_identifier, delta_type_node);
6395 TREE_CHAIN (field) = fields;
6398 finish_builtin_struct (t, "__ptrmemfunc_type", fields, ptr_type_node);
6400 /* Zap out the name so that the back-end will give us the debugging
6401 information for this anonymous RECORD_TYPE. */
6402 TYPE_NAME (t) = NULL_TREE;
6404 /* If this is not the unqualified form of this pointer-to-member
6405 type, set the TYPE_MAIN_VARIANT for this type to be the
6406 unqualified type. Since they are actually RECORD_TYPEs that are
6407 not variants of each other, we must do this manually. */
6408 if (cp_type_quals (type) != TYPE_UNQUALIFIED)
6410 t = build_qualified_type (t, cp_type_quals (type));
6411 TYPE_MAIN_VARIANT (t) = unqualified_variant;
6412 TYPE_NEXT_VARIANT (t) = TYPE_NEXT_VARIANT (unqualified_variant);
6413 TYPE_NEXT_VARIANT (unqualified_variant) = t;
6416 /* Cache this pointer-to-member type so that we can find it again
6418 TYPE_SET_PTRMEMFUNC_TYPE (type, t);
6423 /* Create and return a pointer to data member type. */
6426 build_ptrmem_type (tree class_type, tree member_type)
6428 if (TREE_CODE (member_type) == METHOD_TYPE)
6432 arg_types = TYPE_ARG_TYPES (member_type);
6433 class_type = (cp_build_qualified_type
6435 cp_type_quals (TREE_TYPE (TREE_VALUE (arg_types)))));
6437 = build_method_type_directly (class_type,
6438 TREE_TYPE (member_type),
6439 TREE_CHAIN (arg_types));
6440 return build_ptrmemfunc_type (build_pointer_type (member_type));
6444 gcc_assert (TREE_CODE (member_type) != FUNCTION_TYPE);
6445 return build_offset_type (class_type, member_type);
6449 /* DECL is a VAR_DECL defined in-class, whose TYPE is also given.
6450 Check to see that the definition is valid. Issue appropriate error
6451 messages. Return 1 if the definition is particularly bad, or 0
6455 check_static_variable_definition (tree decl, tree type)
6457 /* Motion 10 at San Diego: If a static const integral data member is
6458 initialized with an integral constant expression, the initializer
6459 may appear either in the declaration (within the class), or in
6460 the definition, but not both. If it appears in the class, the
6461 member is a member constant. The file-scope definition is always
6463 if (!ARITHMETIC_TYPE_P (type) && TREE_CODE (type) != ENUMERAL_TYPE)
6465 error ("invalid in-class initialization of static data member "
6466 "of non-integral type %qT",
6468 /* If we just return the declaration, crashes will sometimes
6469 occur. We therefore return void_type_node, as if this were a
6470 friend declaration, to cause callers to completely ignore
6471 this declaration. */
6474 else if (!CP_TYPE_CONST_P (type))
6475 error ("ISO C++ forbids in-class initialization of non-const "
6476 "static member %qD",
6478 else if (pedantic && !INTEGRAL_TYPE_P (type))
6479 pedwarn ("ISO C++ forbids initialization of member constant "
6480 "%qD of non-integral type %qT", decl, type);
6485 /* Given the SIZE (i.e., number of elements) in an array, compute an
6486 appropriate index type for the array. If non-NULL, NAME is the
6487 name of the thing being declared. */
6490 compute_array_index_type (tree name, tree size)
6495 if (error_operand_p (size))
6496 return error_mark_node;
6498 type = TREE_TYPE (size);
6499 /* The array bound must be an integer type. */
6500 if (!dependent_type_p (type) && !INTEGRAL_TYPE_P (type))
6503 error ("size of array %qD has non-integral type %qT", name, type);
6505 error ("size of array has non-integral type %qT", type);
6506 size = integer_one_node;
6507 type = TREE_TYPE (size);
6510 if (abi_version_at_least (2)
6511 /* We should only handle value dependent expressions specially. */
6512 ? value_dependent_expression_p (size)
6513 /* But for abi-1, we handled all instances in templates. This
6514 effects the manglings produced. */
6515 : processing_template_decl)
6516 return build_index_type (build_min (MINUS_EXPR, sizetype,
6517 size, integer_one_node));
6519 /* The size might be the result of a cast. */
6520 STRIP_TYPE_NOPS (size);
6522 /* It might be a const variable or enumeration constant. */
6523 size = integral_constant_value (size);
6525 /* Normally, the array-bound will be a constant. */
6526 if (TREE_CODE (size) == INTEGER_CST)
6528 /* Check to see if the array bound overflowed. Make that an
6529 error, no matter how generous we're being. */
6530 int old_flag_pedantic_errors = flag_pedantic_errors;
6531 int old_pedantic = pedantic;
6532 pedantic = flag_pedantic_errors = 1;
6533 constant_expression_warning (size);
6534 pedantic = old_pedantic;
6535 flag_pedantic_errors = old_flag_pedantic_errors;
6537 /* An array must have a positive number of elements. */
6538 if (INT_CST_LT (size, integer_zero_node))
6541 error ("size of array %qD is negative", name);
6543 error ("size of array is negative");
6544 size = integer_one_node;
6546 /* As an extension we allow zero-sized arrays. We always allow
6547 them in system headers because glibc uses them. */
6548 else if (integer_zerop (size) && pedantic && !in_system_header)
6551 pedwarn ("ISO C++ forbids zero-size array %qD", name);
6553 pedwarn ("ISO C++ forbids zero-size array");
6556 else if (TREE_CONSTANT (size))
6558 /* `(int) &fn' is not a valid array bound. */
6560 error ("size of array %qD is not an integral constant-expression",
6563 error ("size of array is not an integral constant-expression");
6564 size = integer_one_node;
6569 pedwarn ("ISO C++ forbids variable-size array %qD", name);
6571 pedwarn ("ISO C++ forbids variable-size array");
6574 if (processing_template_decl && !TREE_CONSTANT (size))
6575 /* A variable sized array. */
6576 itype = build_min (MINUS_EXPR, sizetype, size, integer_one_node);
6579 HOST_WIDE_INT saved_processing_template_decl;
6581 /* Compute the index of the largest element in the array. It is
6582 one less than the number of elements in the array. We save
6583 and restore PROCESSING_TEMPLATE_DECL so that computations in
6584 cp_build_binary_op will be appropriately folded. */
6585 saved_processing_template_decl = processing_template_decl;
6586 processing_template_decl = 0;
6587 itype = cp_build_binary_op (MINUS_EXPR,
6588 cp_convert (ssizetype, size),
6589 cp_convert (ssizetype, integer_one_node));
6590 itype = fold (itype);
6591 processing_template_decl = saved_processing_template_decl;
6593 if (!TREE_CONSTANT (itype))
6594 /* A variable sized array. */
6595 itype = variable_size (itype);
6596 /* Make sure that there was no overflow when creating to a signed
6597 index type. (For example, on a 32-bit machine, an array with
6598 size 2^32 - 1 is too big.) */
6599 else if (TREE_CODE (itype) == INTEGER_CST
6600 && TREE_OVERFLOW (itype))
6602 error ("overflow in array dimension");
6603 TREE_OVERFLOW (itype) = 0;
6607 /* Create and return the appropriate index type. */
6608 return build_index_type (itype);
6611 /* Returns the scope (if any) in which the entity declared by
6612 DECLARATOR will be located. If the entity was declared with an
6613 unqualified name, NULL_TREE is returned. */
6616 get_scope_of_declarator (const cp_declarator *declarator)
6618 while (declarator && declarator->kind != cdk_id)
6619 declarator = declarator->declarator;
6621 /* If the declarator-id is a SCOPE_REF, the scope in which the
6622 declaration occurs is the first operand. */
6624 && declarator->u.id.qualifying_scope)
6625 return declarator->u.id.qualifying_scope;
6627 /* Otherwise, the declarator is not a qualified name; the entity will
6628 be declared in the current scope. */
6632 /* Returns an ARRAY_TYPE for an array with SIZE elements of the
6633 indicated TYPE. If non-NULL, NAME is the NAME of the declaration
6637 create_array_type_for_decl (tree name, tree type, tree size)
6639 tree itype = NULL_TREE;
6640 const char* error_msg;
6642 /* If things have already gone awry, bail now. */
6643 if (type == error_mark_node || size == error_mark_node)
6644 return error_mark_node;
6646 /* Assume that everything will go OK. */
6649 /* There are some types which cannot be array elements. */
6650 switch (TREE_CODE (type))
6653 error_msg = "array of void";
6657 error_msg = "array of functions";
6660 case REFERENCE_TYPE:
6661 error_msg = "array of references";
6665 error_msg = "array of function members";
6672 /* If something went wrong, issue an error-message and return. */
6676 error ("declaration of %qD as %s", name, error_msg);
6678 error ("creating %s", error_msg);
6680 return error_mark_node;
6685 The constant expressions that specify the bounds of the arrays
6686 can be omitted only for the first member of the sequence. */
6687 if (TREE_CODE (type) == ARRAY_TYPE && !TYPE_DOMAIN (type))
6690 error ("declaration of %qD as multidimensional array must "
6691 "have bounds for all dimensions except the first",
6694 error ("multidimensional array must have bounds for all "
6695 "dimensions except the first");
6697 return error_mark_node;
6700 /* Figure out the index type for the array. */
6702 itype = compute_array_index_type (name, size);
6705 T is called the array element type; this type shall not be [...] an
6706 abstract class type. */
6707 abstract_virtuals_error (name, type);
6709 return build_cplus_array_type (type, itype);
6712 /* Check that it's OK to declare a function with the indicated TYPE.
6713 SFK indicates the kind of special function (if any) that this
6714 function is. OPTYPE is the type given in a conversion operator
6715 declaration, or the class type for a constructor/destructor.
6716 Returns the actual return type of the function; that
6717 may be different than TYPE if an error occurs, or for certain
6718 special functions. */
6721 check_special_function_return_type (special_function_kind sfk,
6727 case sfk_constructor:
6729 error ("return type specification for constructor invalid");
6731 if (targetm.cxx.cdtor_returns_this () && !TYPE_FOR_JAVA (optype))
6732 type = build_pointer_type (optype);
6734 type = void_type_node;
6737 case sfk_destructor:
6739 error ("return type specification for destructor invalid");
6740 /* We can't use the proper return type here because we run into
6741 problems with ambiguous bases and covariant returns.
6742 Java classes are left unchanged because (void *) isn't a valid
6743 Java type, and we don't want to change the Java ABI. */
6744 if (targetm.cxx.cdtor_returns_this () && !TYPE_FOR_JAVA (optype))
6745 type = build_pointer_type (void_type_node);
6747 type = void_type_node;
6750 case sfk_conversion:
6751 if (type && !same_type_p (type, optype))
6752 error ("operator %qT declared to return %qT", optype, type);
6754 pedwarn ("return type specified for %<operator %T%>", optype);
6765 /* A variable or data member (whose unqualified name is IDENTIFIER)
6766 has been declared with the indicated TYPE. If the TYPE is not
6767 acceptable, issue an error message and return a type to use for
6768 error-recovery purposes. */
6771 check_var_type (tree identifier, tree type)
6773 if (VOID_TYPE_P (type))
6776 error ("unnamed variable or field declared void");
6777 else if (TREE_CODE (identifier) == IDENTIFIER_NODE)
6779 gcc_assert (!IDENTIFIER_OPNAME_P (identifier));
6780 error ("variable or field %qE declared void", identifier);
6783 error ("variable or field declared void");
6784 type = integer_type_node;
6790 /* Given declspecs and a declarator (abstract or otherwise), determine
6791 the name and type of the object declared and construct a DECL node
6794 DECLSPECS is a chain of tree_list nodes whose value fields
6795 are the storage classes and type specifiers.
6797 DECL_CONTEXT says which syntactic context this declaration is in:
6798 NORMAL for most contexts. Make a VAR_DECL or FUNCTION_DECL or TYPE_DECL.
6799 FUNCDEF for a function definition. Like NORMAL but a few different
6800 error messages in each case. Return value may be zero meaning
6801 this definition is too screwy to try to parse.
6802 MEMFUNCDEF for a function definition. Like FUNCDEF but prepares to
6803 handle member functions (which have FIELD context).
6804 Return value may be zero meaning this definition is too screwy to
6806 PARM for a parameter declaration (either within a function prototype
6807 or before a function body). Make a PARM_DECL, or return void_type_node.
6808 CATCHPARM for a parameter declaration before a catch clause.
6809 TYPENAME if for a typename (in a cast or sizeof).
6810 Don't make a DECL node; just return the ..._TYPE node.
6811 FIELD for a struct or union field; make a FIELD_DECL.
6812 BITFIELD for a field with specified width.
6813 INITIALIZED is 1 if the decl has an initializer.
6815 ATTRLIST is a pointer to the list of attributes, which may be NULL
6816 if there are none; *ATTRLIST may be modified if attributes from inside
6817 the declarator should be applied to the declaration.
6819 When this function is called, scoping variables (such as
6820 CURRENT_CLASS_TYPE) should reflect the scope in which the
6821 declaration occurs, not the scope in which the new declaration will
6822 be placed. For example, on:
6826 when grokdeclarator is called for `S::f', the CURRENT_CLASS_TYPE
6829 Returns a DECL (if a declarator is present), a TYPE (if there is no
6830 declarator, in cases like "struct S;"), or the ERROR_MARK_NODE if an
6834 grokdeclarator (const cp_declarator *declarator,
6835 const cp_decl_specifier_seq *declspecs,
6836 enum decl_context decl_context,
6840 tree type = NULL_TREE;
6842 int virtualp, explicitp, friendp, inlinep, staticp;
6843 int explicit_int = 0;
6844 int explicit_char = 0;
6845 int defaulted_int = 0;
6846 tree dependent_name = NULL_TREE;
6848 tree typedef_decl = NULL_TREE;
6849 const char *name = NULL;
6850 tree typedef_type = NULL_TREE;
6851 /* True if this declarator is a function definition. */
6852 bool funcdef_flag = false;
6853 cp_declarator_kind innermost_code = cdk_error;
6856 /* See the code below that used this. */
6857 tree decl_attr = NULL_TREE;
6860 /* Keep track of what sort of function is being processed
6861 so that we can warn about default return values, or explicit
6862 return values which do not match prescribed defaults. */
6863 special_function_kind sfk = sfk_none;
6865 tree dname = NULL_TREE;
6866 tree ctor_return_type = NULL_TREE;
6867 enum overload_flags flags = NO_SPECIAL;
6868 /* cv-qualifiers that apply to the declarator, for a declaration of
6869 a member function. */
6870 cp_cv_quals memfn_quals = TYPE_UNQUALIFIED;
6871 /* cv-qualifiers that apply to the type specified by the DECLSPECS. */
6873 tree raises = NULL_TREE;
6874 int template_count = 0;
6875 tree returned_attrs = NULL_TREE;
6876 tree parms = NULL_TREE;
6877 const cp_declarator *id_declarator;
6878 /* The unqualified name of the declarator; either an
6879 IDENTIFIER_NODE, BIT_NOT_EXPR, or TEMPLATE_ID_EXPR. */
6880 tree unqualified_id;
6881 /* The class type, if any, in which this entity is located,
6882 or NULL_TREE if none. Note that this value may be different from
6883 the current class type; for example if an attempt is made to declare
6884 "A::f" inside "B", this value will be "A". */
6885 tree ctype = current_class_type;
6886 /* The NAMESPACE_DECL for the namespace in which this entity is
6887 located. If an unqualified name is used to declare the entity,
6888 this value will be NULL_TREE, even if the entity is located at
6890 tree in_namespace = NULL_TREE;
6891 cp_storage_class storage_class;
6892 bool unsigned_p, signed_p, short_p, long_p, thread_p;
6893 bool type_was_error_mark_node = false;
6895 signed_p = declspecs->specs[(int)ds_signed];
6896 unsigned_p = declspecs->specs[(int)ds_unsigned];
6897 short_p = declspecs->specs[(int)ds_short];
6898 long_p = declspecs->specs[(int)ds_long];
6899 longlong = declspecs->specs[(int)ds_long] >= 2;
6900 thread_p = declspecs->specs[(int)ds_thread];
6902 if (decl_context == FUNCDEF)
6903 funcdef_flag = true, decl_context = NORMAL;
6904 else if (decl_context == MEMFUNCDEF)
6905 funcdef_flag = true, decl_context = FIELD;
6906 else if (decl_context == BITFIELD)
6907 bitfield = 1, decl_context = FIELD;
6909 /* Look inside a declarator for the name being declared
6910 and get it as a string, for an error message. */
6911 for (id_declarator = declarator;
6913 id_declarator = id_declarator->declarator)
6915 if (id_declarator->kind != cdk_id)
6916 innermost_code = id_declarator->kind;
6918 switch (id_declarator->kind)
6921 if (id_declarator->declarator
6922 && id_declarator->declarator->kind == cdk_id)
6924 sfk = id_declarator->declarator->u.id.sfk;
6925 if (sfk == sfk_destructor)
6932 tree qualifying_scope = id_declarator->u.id.qualifying_scope;
6933 tree decl = id_declarator->u.id.unqualified_name;
6936 if (qualifying_scope)
6938 if (TYPE_P (qualifying_scope))
6940 ctype = qualifying_scope;
6941 if (innermost_code != cdk_function
6942 && current_class_type
6943 && !UNIQUELY_DERIVED_FROM_P (ctype,
6944 current_class_type))
6946 error ("type %qT is not derived from type %qT",
6947 ctype, current_class_type);
6948 return error_mark_node;
6951 else if (TREE_CODE (qualifying_scope) == NAMESPACE_DECL)
6952 in_namespace = qualifying_scope;
6954 switch (TREE_CODE (decl))
6960 if (innermost_code != cdk_function)
6962 error ("declaration of %qD as non-function", decl);
6963 return error_mark_node;
6965 else if (!qualifying_scope
6966 && !(current_class_type && at_class_scope_p ()))
6968 error ("declaration of %qD as non-member", decl);
6969 return error_mark_node;
6972 type = TREE_OPERAND (decl, 0);
6973 name = IDENTIFIER_POINTER (constructor_name (type));
6978 case TEMPLATE_ID_EXPR:
6980 tree fns = TREE_OPERAND (decl, 0);
6983 if (TREE_CODE (dname) == COMPONENT_REF)
6984 dname = TREE_OPERAND (dname, 1);
6985 if (TREE_CODE (dname) != IDENTIFIER_NODE)
6987 gcc_assert (is_overloaded_fn (dname));
6988 dname = DECL_NAME (get_first_fn (dname));
6993 case IDENTIFIER_NODE:
6994 if (TREE_CODE (decl) == IDENTIFIER_NODE)
6997 if (C_IS_RESERVED_WORD (dname))
6999 error ("declarator-id missing; using reserved word %qD",
7001 name = IDENTIFIER_POINTER (dname);
7003 else if (!IDENTIFIER_TYPENAME_P (dname))
7004 name = IDENTIFIER_POINTER (dname);
7007 gcc_assert (flags == NO_SPECIAL);
7008 flags = TYPENAME_FLAG;
7009 ctor_return_type = TREE_TYPE (dname);
7010 sfk = sfk_conversion;
7011 if (is_typename_at_global_scope (dname))
7012 name = IDENTIFIER_POINTER (dname);
7014 name = "<invalid operator>";
7030 return error_mark_node;
7036 if (id_declarator->kind == cdk_id)
7042 The declarator in a function-definition shall have the form
7043 D1 ( parameter-declaration-clause) ... */
7044 if (funcdef_flag && innermost_code != cdk_function)
7046 error ("function definition does not declare parameters");
7047 return error_mark_node;
7050 if (((dname && IDENTIFIER_OPNAME_P (dname)) || flags == TYPENAME_FLAG)
7051 && innermost_code != cdk_function
7052 && ! (ctype && !declspecs->any_specifiers_p))
7054 error ("declaration of %qD as non-function", dname);
7055 return error_mark_node;
7058 /* Anything declared one level down from the top level
7059 must be one of the parameters of a function
7060 (because the body is at least two levels down). */
7062 /* This heuristic cannot be applied to C++ nodes! Fixed, however,
7063 by not allowing C++ class definitions to specify their parameters
7064 with xdecls (must be spec.d in the parmlist).
7066 Since we now wait to push a class scope until we are sure that
7067 we are in a legitimate method context, we must set oldcname
7068 explicitly (since current_class_name is not yet alive).
7070 We also want to avoid calling this a PARM if it is in a namespace. */
7072 if (decl_context == NORMAL && !toplevel_bindings_p ())
7074 struct cp_binding_level *b = current_binding_level;
7075 current_binding_level = b->level_chain;
7076 if (current_binding_level != 0 && toplevel_bindings_p ())
7077 decl_context = PARM;
7078 current_binding_level = b;
7082 name = decl_context == PARM ? "parameter" : "type name";
7084 /* If there were multiple types specified in the decl-specifier-seq,
7085 issue an error message. */
7086 if (declspecs->multiple_types_p)
7087 error ("two or more data types in declaration of %qs", name);
7088 /* Extract the basic type from the decl-specifier-seq. */
7089 type = declspecs->type;
7090 if (type == error_mark_node)
7093 type_was_error_mark_node = true;
7095 /* If the entire declaration is itself tagged as deprecated then
7096 suppress reports of deprecated items. */
7097 if (type && TREE_DEPRECATED (type)
7098 && deprecated_state != DEPRECATED_SUPPRESS)
7099 warn_deprecated_use (type);
7100 if (type && TREE_CODE (type) == TYPE_DECL)
7102 typedef_decl = type;
7103 type = TREE_TYPE (typedef_decl);
7105 /* No type at all: default to `int', and set DEFAULTED_INT
7106 because it was not a user-defined typedef. */
7107 if (type == NULL_TREE && (signed_p || unsigned_p || long_p || short_p))
7109 /* These imply 'int'. */
7110 type = integer_type_node;
7114 explicit_int = declspecs->explicit_int_p;
7115 explicit_char = declspecs->explicit_char_p;
7118 /* See the code below that used this. */
7120 decl_attr = DECL_ATTRIBUTES (typedef_decl);
7122 typedef_type = type;
7125 if (sfk != sfk_conversion)
7126 ctor_return_type = ctype;
7128 if (sfk != sfk_none)
7129 type = check_special_function_return_type (sfk, type,
7131 else if (type == NULL_TREE)
7137 /* We handle `main' specially here, because 'main () { }' is so
7138 common. With no options, it is allowed. With -Wreturn-type,
7139 it is a warning. It is only an error with -pedantic-errors. */
7140 is_main = (funcdef_flag
7141 && dname && MAIN_NAME_P (dname)
7142 && ctype == NULL_TREE
7143 && in_namespace == NULL_TREE
7144 && current_namespace == global_namespace);
7146 if (type_was_error_mark_node)
7147 /* We've already issued an error, don't complain more. */;
7148 else if (in_system_header || flag_ms_extensions)
7149 /* Allow it, sigh. */;
7150 else if (pedantic || ! is_main)
7151 pedwarn ("ISO C++ forbids declaration of %qs with no type", name);
7152 else if (warn_return_type)
7153 warning (0, "ISO C++ forbids declaration of %qs with no type", name);
7155 type = integer_type_node;
7160 /* Now process the modifiers that were specified
7161 and check for invalid combinations. */
7163 /* Long double is a special combination. */
7164 if (long_p && !longlong && TYPE_MAIN_VARIANT (type) == double_type_node)
7167 type = build_qualified_type (long_double_type_node,
7168 cp_type_quals (type));
7171 /* Check all other uses of type modifiers. */
7173 if (unsigned_p || signed_p || long_p || short_p)
7177 if ((signed_p || unsigned_p) && TREE_CODE (type) != INTEGER_TYPE)
7178 error ("%<signed%> or %<unsigned%> invalid for %qs", name);
7179 else if (signed_p && unsigned_p)
7180 error ("%<signed%> and %<unsigned%> specified together for %qs", name);
7181 else if (longlong && TREE_CODE (type) != INTEGER_TYPE)
7182 error ("%<long long%> invalid for %qs", name);
7183 else if (long_p && TREE_CODE (type) == REAL_TYPE)
7184 error ("%<long%> invalid for %qs", name);
7185 else if (short_p && TREE_CODE (type) == REAL_TYPE)
7186 error ("%<short%> invalid for %qs", name);
7187 else if ((long_p || short_p) && explicit_char)
7188 error ("%<long%> or %<short%> specified with char for %qs", name);
7189 else if (long_p && short_p)
7190 error ("%<long%> and %<short%> specified together for %qs", name);
7194 if (!explicit_int && !defaulted_int && !explicit_char && pedantic)
7196 pedwarn ("long, short, signed or unsigned used invalidly for %qs",
7198 if (flag_pedantic_errors)
7203 /* Discard the type modifiers if they are invalid. */
7214 /* Decide whether an integer type is signed or not.
7215 Optionally treat bitfields as signed by default. */
7219 It is implementation-defined whether a plain (neither
7220 explicitly signed or unsigned) char, short, int, or long
7221 bit-field is signed or unsigned.
7223 Naturally, we extend this to long long as well. Note that
7224 this does not include wchar_t. */
7225 || (bitfield && !flag_signed_bitfields
7227 /* A typedef for plain `int' without `signed' can be
7228 controlled just like plain `int', but a typedef for
7229 `signed int' cannot be so controlled. */
7231 && C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl))
7232 && TREE_CODE (type) == INTEGER_TYPE
7233 && !same_type_p (TYPE_MAIN_VARIANT (type), wchar_type_node)))
7236 type = long_long_unsigned_type_node;
7238 type = long_unsigned_type_node;
7240 type = short_unsigned_type_node;
7241 else if (type == char_type_node)
7242 type = unsigned_char_type_node;
7243 else if (typedef_decl)
7244 type = c_common_unsigned_type (type);
7246 type = unsigned_type_node;
7248 else if (signed_p && type == char_type_node)
7249 type = signed_char_type_node;
7251 type = long_long_integer_type_node;
7253 type = long_integer_type_node;
7255 type = short_integer_type_node;
7257 if (declspecs->specs[(int)ds_complex])
7259 if (TREE_CODE (type) != INTEGER_TYPE && TREE_CODE (type) != REAL_TYPE)
7260 error ("complex invalid for %qs", name);
7261 /* If we just have "complex", it is equivalent to
7262 "complex double", but if any modifiers at all are specified it is
7263 the complex form of TYPE. E.g, "complex short" is
7264 "complex short int". */
7266 else if (defaulted_int && ! longlong
7267 && ! (long_p || short_p || signed_p || unsigned_p))
7268 type = complex_double_type_node;
7269 else if (type == integer_type_node)
7270 type = complex_integer_type_node;
7271 else if (type == float_type_node)
7272 type = complex_float_type_node;
7273 else if (type == double_type_node)
7274 type = complex_double_type_node;
7275 else if (type == long_double_type_node)
7276 type = complex_long_double_type_node;
7278 type = build_complex_type (type);
7281 type_quals = TYPE_UNQUALIFIED;
7282 if (declspecs->specs[(int)ds_const])
7283 type_quals |= TYPE_QUAL_CONST;
7284 if (declspecs->specs[(int)ds_volatile])
7285 type_quals |= TYPE_QUAL_VOLATILE;
7286 if (declspecs->specs[(int)ds_restrict])
7287 type_quals |= TYPE_QUAL_RESTRICT;
7288 if (sfk == sfk_conversion && type_quals != TYPE_UNQUALIFIED)
7289 error ("qualifiers are not allowed on declaration of %<operator %T%>",
7292 if (TREE_CODE (type) == FUNCTION_TYPE
7293 && type_quals != TYPE_UNQUALIFIED)
7295 /* This was an error in C++98 (cv-qualifiers cannot be added to
7296 a function type), but DR 295 makes the code well-formed by
7297 dropping the extra qualifiers. */
7300 tree bad_type = build_qualified_type (type, type_quals);
7301 pedwarn ("ignoring %qV qualifiers added to function type %qT",
7304 type_quals = TYPE_UNQUALIFIED;
7306 type_quals |= cp_type_quals (type);
7307 type = cp_build_qualified_type_real
7308 (type, type_quals, ((typedef_decl && !DECL_ARTIFICIAL (typedef_decl)
7309 ? tf_ignore_bad_quals : 0) | tf_warning_or_error));
7310 /* We might have ignored or rejected some of the qualifiers. */
7311 type_quals = cp_type_quals (type);
7314 inlinep = !! declspecs->specs[(int)ds_inline];
7315 virtualp = !! declspecs->specs[(int)ds_virtual];
7316 explicitp = !! declspecs->specs[(int)ds_explicit];
7318 storage_class = declspecs->storage_class;
7319 if (storage_class == sc_static)
7320 staticp = 1 + (decl_context == FIELD);
7322 if (virtualp && staticp == 2)
7324 error ("member %qD cannot be declared both virtual and static", dname);
7325 storage_class = sc_none;
7328 friendp = !! declspecs->specs[(int)ds_friend];
7330 if (dependent_name && !friendp)
7332 error ("%<%T::%D%> is not a valid declarator", ctype, dependent_name);
7333 return error_mark_node;
7336 /* Issue errors about use of storage classes for parameters. */
7337 if (decl_context == PARM)
7339 if (declspecs->specs[(int)ds_typedef])
7340 error ("typedef declaration invalid in parameter declaration");
7341 else if (storage_class == sc_static
7342 || storage_class == sc_extern
7344 error ("storage class specifiers invalid in parameter declarations");
7347 /* Give error if `virtual' is used outside of class declaration. */
7349 && (current_class_name == NULL_TREE || decl_context != FIELD))
7351 error ("virtual outside class declaration");
7355 /* Static anonymous unions are dealt with here. */
7356 if (staticp && decl_context == TYPENAME
7358 && ANON_AGGR_TYPE_P (declspecs->type))
7359 decl_context = FIELD;
7361 /* Warn about storage classes that are invalid for certain
7362 kinds of declarations (parameters, typenames, etc.). */
7363 if (declspecs->multiple_storage_classes_p)
7365 error ("multiple storage classes in declaration of %qs", name);
7366 storage_class = sc_none;
7370 && storage_class != sc_extern
7371 && storage_class != sc_static)
7372 || declspecs->specs[(int)ds_typedef]))
7374 error ("multiple storage classes in declaration of %qs", name);
7377 else if (decl_context != NORMAL
7378 && ((storage_class != sc_none
7379 && storage_class != sc_mutable)
7382 if ((decl_context == PARM || decl_context == CATCHPARM)
7383 && (storage_class == sc_register
7384 || storage_class == sc_auto))
7386 else if (declspecs->specs[(int)ds_typedef])
7388 else if (decl_context == FIELD
7389 /* C++ allows static class elements. */
7390 && storage_class == sc_static)
7391 /* C++ also allows inlines and signed and unsigned elements,
7392 but in those cases we don't come in here. */
7396 if (decl_context == FIELD)
7397 error ("storage class specified for %qs", name);
7400 if (decl_context == PARM || decl_context == CATCHPARM)
7401 error ("storage class specified for parameter %qs", name);
7403 error ("storage class specified for typename");
7405 if (storage_class == sc_register
7406 || storage_class == sc_auto
7407 || storage_class == sc_extern
7409 storage_class = sc_none;
7412 else if (storage_class == sc_extern && initialized
7415 if (toplevel_bindings_p ())
7417 /* It's common practice (and completely valid) to have a const
7418 be initialized and declared extern. */
7419 if (!(type_quals & TYPE_QUAL_CONST))
7420 warning (0, "%qs initialized and declared %<extern%>", name);
7423 error ("%qs has both %<extern%> and initializer", name);
7425 else if (storage_class == sc_extern && funcdef_flag
7426 && ! toplevel_bindings_p ())
7427 error ("nested function %qs declared %<extern%>", name);
7428 else if (toplevel_bindings_p ())
7430 if (storage_class == sc_auto)
7431 error ("top-level declaration of %qs specifies %<auto%>", name);
7434 && storage_class != sc_extern
7435 && storage_class != sc_static)
7437 error ("function-scope %qs implicitly auto and declared %<__thread%>",
7442 if (storage_class && friendp)
7443 error ("storage class specifiers invalid in friend function declarations");
7446 unqualified_id = NULL_TREE;
7449 unqualified_id = id_declarator->u.id.unqualified_name;
7450 switch (TREE_CODE (unqualified_id))
7454 = constructor_name (TREE_OPERAND (unqualified_id, 0));
7457 case IDENTIFIER_NODE:
7458 case TEMPLATE_ID_EXPR:
7466 /* Determine the type of the entity declared by recurring on the
7468 for (; declarator; declarator = declarator->declarator)
7470 const cp_declarator *inner_declarator;
7473 if (type == error_mark_node)
7474 return error_mark_node;
7476 attrs = declarator->attributes;
7482 if (declarator == NULL || declarator->kind == cdk_id)
7483 attr_flags |= (int) ATTR_FLAG_DECL_NEXT;
7484 if (declarator->kind == cdk_function)
7485 attr_flags |= (int) ATTR_FLAG_FUNCTION_NEXT;
7486 if (declarator->kind == cdk_array)
7487 attr_flags |= (int) ATTR_FLAG_ARRAY_NEXT;
7488 returned_attrs = decl_attributes (&type,
7489 chainon (returned_attrs, attrs),
7493 if (declarator->kind == cdk_id)
7496 inner_declarator = declarator->declarator;
7498 switch (declarator->kind)
7501 type = create_array_type_for_decl (dname, type,
7502 declarator->u.array.bounds);
7510 /* Declaring a function type.
7511 Make sure we have a valid type for the function to return. */
7513 /* We now know that the TYPE_QUALS don't apply to the
7514 decl, but to its return type. */
7515 type_quals = TYPE_UNQUALIFIED;
7517 /* Warn about some types functions can't return. */
7519 if (TREE_CODE (type) == FUNCTION_TYPE)
7521 error ("%qs declared as function returning a function", name);
7522 type = integer_type_node;
7524 if (TREE_CODE (type) == ARRAY_TYPE)
7526 error ("%qs declared as function returning an array", name);
7527 type = integer_type_node;
7530 /* Pick up type qualifiers which should be applied to `this'. */
7531 memfn_quals = declarator->u.function.qualifiers;
7533 /* Pick up the exception specifications. */
7534 raises = declarator->u.function.exception_specification;
7536 /* Say it's a definition only for the CALL_EXPR
7537 closest to the identifier. */
7538 funcdecl_p = inner_declarator && inner_declarator->kind == cdk_id;
7540 if (ctype == NULL_TREE
7541 && decl_context == FIELD
7543 && (friendp == 0 || dname == current_class_name))
7544 ctype = current_class_type;
7546 if (ctype && (sfk == sfk_constructor
7547 || sfk == sfk_destructor))
7549 /* We are within a class's scope. If our declarator name
7550 is the same as the class name, and we are defining
7551 a function, then it is a constructor/destructor, and
7552 therefore returns a void type. */
7554 /* ISO C++ 12.4/2. A destructor may not be declared
7555 const or volatile. A destructor may not be
7558 ISO C++ 12.1. A constructor may not be declared
7559 const or volatile. A constructor may not be
7560 virtual. A constructor may not be static. */
7562 error ((flags == DTOR_FLAG)
7563 ? "destructor cannot be static member function"
7564 : "constructor cannot be static member function");
7567 error ((flags == DTOR_FLAG)
7568 ? "destructors may not be cv-qualified"
7569 : "constructors may not be cv-qualified");
7570 memfn_quals = TYPE_UNQUALIFIED;
7573 if (decl_context == FIELD
7574 && !member_function_or_else (ctype,
7577 return error_mark_node;
7579 if (flags != DTOR_FLAG)
7581 /* It's a constructor. */
7586 pedwarn ("constructors cannot be declared virtual");
7589 if (decl_context == FIELD
7590 && sfk != sfk_constructor)
7591 return error_mark_node;
7593 if (decl_context == FIELD)
7599 error ("can't initialize friend function %qs", name);
7602 /* Cannot be both friend and virtual. */
7603 error ("virtual functions cannot be friends");
7606 if (decl_context == NORMAL)
7607 error ("friend declaration not in class definition");
7608 if (current_function_decl && funcdef_flag)
7609 error ("can't define friend function %qs in a local "
7614 arg_types = grokparms (declarator->u.function.parameters,
7617 if (inner_declarator
7618 && inner_declarator->kind == cdk_id
7619 && inner_declarator->u.id.sfk == sfk_destructor
7620 && arg_types != void_list_node)
7622 error ("destructors may not have parameters");
7623 arg_types = void_list_node;
7627 type = build_function_type (type, arg_types);
7634 /* Filter out pointers-to-references and references-to-references.
7635 We can get these if a TYPE_DECL is used. */
7637 if (TREE_CODE (type) == REFERENCE_TYPE)
7639 error (declarator->kind == cdk_reference
7640 ? "cannot declare reference to %q#T"
7641 : "cannot declare pointer to %q#T", type);
7642 type = TREE_TYPE (type);
7644 else if (VOID_TYPE_P (type))
7646 if (declarator->kind == cdk_reference)
7647 error ("cannot declare reference to %q#T", type);
7648 else if (declarator->kind == cdk_ptrmem)
7649 error ("cannot declare pointer to %q#T member", type);
7652 /* We now know that the TYPE_QUALS don't apply to the decl,
7653 but to the target of the pointer. */
7654 type_quals = TYPE_UNQUALIFIED;
7656 if (declarator->kind == cdk_ptrmem
7657 && (TREE_CODE (type) == FUNCTION_TYPE || memfn_quals))
7659 memfn_quals |= cp_type_quals (type);
7660 type = build_memfn_type (type,
7661 declarator->u.pointer.class_type,
7663 memfn_quals = TYPE_UNQUALIFIED;
7666 if (declarator->kind == cdk_reference)
7668 if (!VOID_TYPE_P (type))
7669 type = build_reference_type (type);
7671 else if (TREE_CODE (type) == METHOD_TYPE)
7672 type = build_ptrmemfunc_type (build_pointer_type (type));
7673 else if (declarator->kind == cdk_ptrmem)
7675 gcc_assert (TREE_CODE (declarator->u.pointer.class_type)
7677 if (declarator->u.pointer.class_type == error_mark_node)
7678 /* We will already have complained. */
7679 type = error_mark_node;
7681 type = build_ptrmem_type (declarator->u.pointer.class_type,
7685 type = build_pointer_type (type);
7687 /* Process a list of type modifier keywords (such as
7688 const or volatile) that were given inside the `*' or `&'. */
7690 if (declarator->u.pointer.qualifiers)
7693 = cp_build_qualified_type (type,
7694 declarator->u.pointer.qualifiers);
7695 type_quals = cp_type_quals (type);
7708 if (unqualified_id && TREE_CODE (unqualified_id) == TEMPLATE_ID_EXPR
7709 && TREE_CODE (type) != FUNCTION_TYPE
7710 && TREE_CODE (type) != METHOD_TYPE)
7712 error ("template-id %qD used as a declarator",
7714 unqualified_id = dname;
7717 /* If TYPE is a FUNCTION_TYPE, but the function name was explicitly
7718 qualified with a class-name, turn it into a METHOD_TYPE, unless
7719 we know that the function is static. We take advantage of this
7720 opportunity to do other processing that pertains to entities
7721 explicitly declared to be class members. Note that if DECLARATOR
7722 is non-NULL, we know it is a cdk_id declarator; otherwise, we
7723 would not have exited the loop above. */
7725 && declarator->u.id.qualifying_scope
7726 && TYPE_P (declarator->u.id.qualifying_scope))
7730 ctype = declarator->u.id.qualifying_scope;
7731 ctype = TYPE_MAIN_VARIANT (ctype);
7733 while (t != NULL_TREE && CLASS_TYPE_P (t))
7735 /* You're supposed to have one `template <...>' for every
7736 template class, but you don't need one for a full
7737 specialization. For example:
7739 template <class T> struct S{};
7740 template <> struct S<int> { void f(); };
7741 void S<int>::f () {}
7743 is correct; there shouldn't be a `template <>' for the
7744 definition of `S<int>::f'. */
7745 if (CLASSTYPE_TEMPLATE_SPECIALIZATION (t)
7746 && !any_dependent_template_arguments_p (CLASSTYPE_TI_ARGS (t)))
7747 /* T is an explicit (not partial) specialization. All
7748 containing classes must therefore also be explicitly
7751 if ((CLASSTYPE_USE_TEMPLATE (t) || CLASSTYPE_IS_TEMPLATE (t))
7752 && PRIMARY_TEMPLATE_P (CLASSTYPE_TI_TEMPLATE (t)))
7753 template_count += 1;
7755 t = TYPE_MAIN_DECL (t);
7756 t = DECL_CONTEXT (t);
7759 if (ctype == current_class_type)
7762 pedwarn ("member functions are implicitly friends of their class");
7764 pedwarn ("extra qualification %<%T::%> on member %qs",
7767 else if (/* If the qualifying type is already complete, then we
7768 can skip the following checks. */
7769 !COMPLETE_TYPE_P (ctype)
7770 && (/* If the function is being defined, then
7771 qualifying type must certainly be complete. */
7773 /* A friend declaration of "T::f" is OK, even if
7774 "T" is a template parameter. But, if this
7775 function is not a friend, the qualifying type
7777 || (!friendp && !CLASS_TYPE_P (ctype))
7778 /* For a declaration, the type need not be
7779 complete, if either it is dependent (since there
7780 is no meaningful definition of complete in that
7781 case) or the qualifying class is currently being
7783 || !(dependent_type_p (ctype)
7784 || currently_open_class (ctype)))
7785 /* Check that the qualifying type is complete. */
7786 && !complete_type_or_else (ctype, NULL_TREE))
7787 return error_mark_node;
7788 else if (TREE_CODE (type) == FUNCTION_TYPE)
7790 tree sname = declarator->u.id.unqualified_name;
7792 if (current_class_type
7793 && (!friendp || funcdef_flag))
7796 ? "cannot define member function %<%T::%s%> within %<%T%>"
7797 : "cannot declare member function %<%T::%s%> within %<%T%>",
7798 ctype, name, current_class_type);
7799 return error_mark_node;
7802 if (TREE_CODE (sname) == IDENTIFIER_NODE
7803 && NEW_DELETE_OPNAME_P (sname))
7804 /* Overloaded operator new and operator delete
7805 are always static functions. */
7808 type = build_memfn_type (type, ctype, memfn_quals);
7810 else if (declspecs->specs[(int)ds_typedef]
7811 && current_class_type)
7813 error ("cannot declare member %<%T::%s%> within %qT",
7814 ctype, name, current_class_type);
7815 return error_mark_node;
7819 /* Now TYPE has the actual type. */
7824 *attrlist = chainon (returned_attrs, *attrlist);
7826 attrlist = &returned_attrs;
7829 /* Did array size calculations overflow? */
7831 if (TREE_CODE (type) == ARRAY_TYPE
7832 && COMPLETE_TYPE_P (type)
7833 && TREE_CODE (TYPE_SIZE_UNIT (type)) == INTEGER_CST
7834 && TREE_OVERFLOW (TYPE_SIZE_UNIT (type)))
7836 error ("size of array %qs is too large", name);
7837 /* If we proceed with the array type as it is, we'll eventually
7838 crash in tree_low_cst(). */
7839 type = error_mark_node;
7842 if ((decl_context == FIELD || decl_context == PARM)
7843 && !processing_template_decl
7844 && variably_modified_type_p (type, NULL_TREE))
7846 if (decl_context == FIELD)
7847 error ("data member may not have variably modified type %qT", type);
7849 error ("parameter may not have variably modified type %qT", type);
7850 type = error_mark_node;
7853 if (explicitp == 1 || (explicitp && friendp))
7855 /* [dcl.fct.spec] The explicit specifier shall only be used in
7856 declarations of constructors within a class definition. */
7857 error ("only declarations of constructors can be %<explicit%>");
7861 if (storage_class == sc_mutable)
7863 if (decl_context != FIELD || friendp)
7865 error ("non-member %qs cannot be declared %<mutable%>", name);
7866 storage_class = sc_none;
7868 else if (decl_context == TYPENAME || declspecs->specs[(int)ds_typedef])
7870 error ("non-object member %qs cannot be declared %<mutable%>", name);
7871 storage_class = sc_none;
7873 else if (TREE_CODE (type) == FUNCTION_TYPE
7874 || TREE_CODE (type) == METHOD_TYPE)
7876 error ("function %qs cannot be declared %<mutable%>", name);
7877 storage_class = sc_none;
7881 error ("static %qs cannot be declared %<mutable%>", name);
7882 storage_class = sc_none;
7884 else if (type_quals & TYPE_QUAL_CONST)
7886 error ("const %qs cannot be declared %<mutable%>", name);
7887 storage_class = sc_none;
7891 /* If this is declaring a typedef name, return a TYPE_DECL. */
7892 if (declspecs->specs[(int)ds_typedef] && decl_context != TYPENAME)
7896 /* Note that the grammar rejects storage classes
7897 in typenames, fields or parameters. */
7898 if (current_lang_name == lang_name_java)
7899 TYPE_FOR_JAVA (type) = 1;
7901 /* This declaration:
7903 typedef void f(int) const;
7905 declares a function type which is not a member of any
7906 particular class, but which is cv-qualified; for
7907 example "f S::*" declares a pointer to a const-qualified
7908 member function of S. We record the cv-qualification in the
7910 if (memfn_quals && TREE_CODE (type) == FUNCTION_TYPE)
7911 type = cp_build_qualified_type (type, memfn_quals);
7913 if (decl_context == FIELD)
7914 decl = build_lang_decl (TYPE_DECL, unqualified_id, type);
7916 decl = build_decl (TYPE_DECL, unqualified_id, type);
7917 if (id_declarator && declarator->u.id.qualifying_scope)
7918 error ("%Jtypedef name may not be a nested-name-specifier", decl);
7920 if (decl_context != FIELD)
7922 if (!current_function_decl)
7923 DECL_CONTEXT (decl) = FROB_CONTEXT (current_namespace);
7924 else if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (current_function_decl)
7925 || (DECL_MAYBE_IN_CHARGE_DESTRUCTOR_P
7926 (current_function_decl)))
7927 /* The TYPE_DECL is "abstract" because there will be
7928 clones of this constructor/destructor, and there will
7929 be copies of this TYPE_DECL generated in those
7931 DECL_ABSTRACT (decl) = 1;
7933 else if (constructor_name_p (unqualified_id, current_class_type))
7934 pedwarn ("ISO C++ forbids nested type %qD with same name "
7935 "as enclosing class",
7938 /* If the user declares "typedef struct {...} foo" then the
7939 struct will have an anonymous name. Fill that name in now.
7940 Nothing can refer to it, so nothing needs know about the name
7942 if (type != error_mark_node
7945 && TREE_CODE (TYPE_NAME (type)) == TYPE_DECL
7946 && TYPE_ANONYMOUS_P (type)
7947 /* Don't do this if there are attributes. */
7948 && (!attrlist || !*attrlist)
7949 && cp_type_quals (type) == TYPE_UNQUALIFIED)
7951 tree oldname = TYPE_NAME (type);
7954 /* Replace the anonymous name with the real name everywhere. */
7955 for (t = TYPE_MAIN_VARIANT (type); t; t = TYPE_NEXT_VARIANT (t))
7956 if (TYPE_NAME (t) == oldname)
7957 TYPE_NAME (t) = decl;
7959 if (TYPE_LANG_SPECIFIC (type))
7960 TYPE_WAS_ANONYMOUS (type) = 1;
7962 /* If this is a typedef within a template class, the nested
7963 type is a (non-primary) template. The name for the
7964 template needs updating as well. */
7965 if (TYPE_LANG_SPECIFIC (type) && CLASSTYPE_TEMPLATE_INFO (type))
7966 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type))
7967 = TYPE_IDENTIFIER (type);
7969 /* FIXME remangle member functions; member functions of a
7970 type with external linkage have external linkage. */
7973 /* Any qualifiers on a function type typedef have already been
7975 if (memfn_quals && !ctype && TREE_CODE (type) == FUNCTION_TYPE)
7976 memfn_quals = TYPE_UNQUALIFIED;
7979 || (typedef_decl && C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl)))
7980 C_TYPEDEF_EXPLICITLY_SIGNED (decl) = 1;
7982 bad_specifiers (decl, "type", virtualp,
7983 memfn_quals != TYPE_UNQUALIFIED,
7984 inlinep, friendp, raises != NULL_TREE);
7989 /* Detect the case of an array type of unspecified size
7990 which came, as such, direct from a typedef name.
7991 We must copy the type, so that the array's domain can be
7992 individually set by the object's initializer. */
7994 if (type && typedef_type
7995 && TREE_CODE (type) == ARRAY_TYPE && !TYPE_DOMAIN (type)
7996 && TYPE_MAIN_VARIANT (type) == TYPE_MAIN_VARIANT (typedef_type))
7997 type = build_cplus_array_type (TREE_TYPE (type), NULL_TREE);
7999 /* Detect where we're using a typedef of function type to declare a
8000 function. PARMS will not be set, so we must create it now. */
8002 if (type == typedef_type && TREE_CODE (type) == FUNCTION_TYPE)
8004 tree decls = NULL_TREE;
8007 for (args = TYPE_ARG_TYPES (type); args; args = TREE_CHAIN (args))
8009 tree decl = cp_build_parm_decl (NULL_TREE, TREE_VALUE (args));
8011 TREE_CHAIN (decl) = decls;
8015 parms = nreverse (decls);
8017 if (decl_context != TYPENAME)
8019 /* A cv-qualifier-seq shall only be part of the function type
8020 for a non-static member function. [8.3.5/4 dcl.fct] */
8021 if (cp_type_quals (type) != TYPE_UNQUALIFIED
8022 && (current_class_type == NULL_TREE || staticp) )
8024 error ("qualified function types cannot be used to declare %s functions",
8025 (staticp? "static member" : "free"));
8026 type = TYPE_MAIN_VARIANT (type);
8029 /* The qualifiers on the function type become the qualifiers on
8030 the non-static member function. */
8031 memfn_quals |= cp_type_quals (type);
8035 /* If this is a type name (such as, in a cast or sizeof),
8036 compute the type and return it now. */
8038 if (decl_context == TYPENAME)
8040 /* Note that the grammar rejects storage classes
8041 in typenames, fields or parameters. */
8042 if (type_quals != TYPE_UNQUALIFIED)
8043 type_quals = TYPE_UNQUALIFIED;
8045 /* Special case: "friend class foo" looks like a TYPENAME context. */
8048 if (type_quals != TYPE_UNQUALIFIED)
8050 error ("type qualifiers specified for friend class declaration");
8051 type_quals = TYPE_UNQUALIFIED;
8055 error ("%<inline%> specified for friend class declaration");
8061 /* Don't allow friend declaration without a class-key. */
8062 if (TREE_CODE (type) == TEMPLATE_TYPE_PARM)
8063 pedwarn ("template parameters cannot be friends");
8064 else if (TREE_CODE (type) == TYPENAME_TYPE)
8065 pedwarn ("friend declaration requires class-key, "
8066 "i.e. %<friend class %T::%D%>",
8067 TYPE_CONTEXT (type), TYPENAME_TYPE_FULLNAME (type));
8069 pedwarn ("friend declaration requires class-key, "
8070 "i.e. %<friend %#T%>",
8074 /* Only try to do this stuff if we didn't already give up. */
8075 if (type != integer_type_node)
8077 /* A friendly class? */
8078 if (current_class_type)
8079 make_friend_class (current_class_type, TYPE_MAIN_VARIANT (type),
8082 error ("trying to make class %qT a friend of global scope",
8085 type = void_type_node;
8088 else if (memfn_quals)
8090 if (ctype == NULL_TREE)
8092 if (TREE_CODE (type) != METHOD_TYPE)
8093 error ("invalid qualifiers on non-member function type");
8095 ctype = TYPE_METHOD_BASETYPE (type);
8098 type = build_memfn_type (type, ctype, memfn_quals);
8103 else if (unqualified_id == NULL_TREE && decl_context != PARM
8104 && decl_context != CATCHPARM
8105 && TREE_CODE (type) != UNION_TYPE
8108 error ("abstract declarator %qT used as declaration", type);
8109 return error_mark_node;
8112 /* Only functions may be declared using an operator-function-id. */
8114 && IDENTIFIER_OPNAME_P (unqualified_id)
8115 && TREE_CODE (type) != FUNCTION_TYPE
8116 && TREE_CODE (type) != METHOD_TYPE)
8118 error ("declaration of %qD as non-function", unqualified_id);
8119 return error_mark_node;
8122 /* We don't check parameter types here because we can emit a better
8123 error message later. */
8124 if (decl_context != PARM)
8125 type = check_var_type (unqualified_id, type);
8127 /* Now create the decl, which may be a VAR_DECL, a PARM_DECL
8128 or a FUNCTION_DECL, depending on DECL_CONTEXT and TYPE. */
8130 if (decl_context == PARM || decl_context == CATCHPARM)
8132 if (ctype || in_namespace)
8133 error ("cannot use %<::%> in parameter declaration");
8135 /* A parameter declared as an array of T is really a pointer to T.
8136 One declared as a function is really a pointer to a function.
8137 One declared as a member is really a pointer to member. */
8139 if (TREE_CODE (type) == ARRAY_TYPE)
8141 /* Transfer const-ness of array into that of type pointed to. */
8142 type = build_pointer_type (TREE_TYPE (type));
8143 type_quals = TYPE_UNQUALIFIED;
8145 else if (TREE_CODE (type) == FUNCTION_TYPE)
8146 type = build_pointer_type (type);
8152 if (decl_context == PARM)
8154 decl = cp_build_parm_decl (unqualified_id, type);
8156 bad_specifiers (decl, "parameter", virtualp,
8157 memfn_quals != TYPE_UNQUALIFIED,
8158 inlinep, friendp, raises != NULL_TREE);
8160 else if (decl_context == FIELD)
8162 /* The C99 flexible array extension. */
8163 if (!staticp && TREE_CODE (type) == ARRAY_TYPE
8164 && TYPE_DOMAIN (type) == NULL_TREE)
8166 tree itype = compute_array_index_type (dname, integer_zero_node);
8167 type = build_cplus_array_type (TREE_TYPE (type), itype);
8170 if (type == error_mark_node)
8172 /* Happens when declaring arrays of sizes which
8173 are error_mark_node, for example. */
8176 else if (in_namespace && !friendp)
8178 /* Something like struct S { int N::j; }; */
8179 error ("invalid use of %<::%>");
8180 return error_mark_node;
8182 else if (TREE_CODE (type) == FUNCTION_TYPE)
8185 tree function_context;
8189 if (ctype == NULL_TREE)
8190 ctype = current_class_type;
8192 if (ctype == NULL_TREE)
8194 error ("can't make %qD into a method -- not in a class",
8196 return error_mark_node;
8199 /* ``A union may [ ... ] not [ have ] virtual functions.''
8201 if (virtualp && TREE_CODE (ctype) == UNION_TYPE)
8203 error ("function %qD declared virtual inside a union",
8205 return error_mark_node;
8208 if (NEW_DELETE_OPNAME_P (unqualified_id))
8212 error ("%qD cannot be declared virtual, since it "
8218 else if (staticp < 2)
8219 type = build_memfn_type (type, ctype, memfn_quals);
8222 /* Check that the name used for a destructor makes sense. */
8223 if (sfk == sfk_destructor)
8227 gcc_assert (friendp);
8228 error ("expected qualified name in friend declaration "
8229 "for destructor %qD",
8230 id_declarator->u.id.unqualified_name);
8231 return error_mark_node;
8234 if (!same_type_p (TREE_OPERAND
8235 (id_declarator->u.id.unqualified_name, 0),
8238 error ("declaration of %qD as member of %qT",
8239 id_declarator->u.id.unqualified_name, ctype);
8240 return error_mark_node;
8244 /* Tell grokfndecl if it needs to set TREE_PUBLIC on the node. */
8245 function_context = (ctype != NULL_TREE) ?
8246 decl_function_context (TYPE_MAIN_DECL (ctype)) : NULL_TREE;
8247 publicp = (! friendp || ! staticp)
8248 && function_context == NULL_TREE;
8249 decl = grokfndecl (ctype, type,
8250 TREE_CODE (unqualified_id) != TEMPLATE_ID_EXPR
8251 ? unqualified_id : dname,
8254 virtualp, flags, memfn_quals, raises,
8255 friendp ? -1 : 0, friendp, publicp, inlinep,
8257 funcdef_flag, template_count, in_namespace, attrlist);
8258 if (decl == NULL_TREE)
8259 return error_mark_node;
8261 /* This clobbers the attrs stored in `decl' from `attrlist'. */
8262 /* The decl and setting of decl_attr is also turned off. */
8263 decl = build_decl_attribute_variant (decl, decl_attr);
8266 /* [class.conv.ctor]
8268 A constructor declared without the function-specifier
8269 explicit that can be called with a single parameter
8270 specifies a conversion from the type of its first
8271 parameter to the type of its class. Such a constructor
8272 is called a converting constructor. */
8274 DECL_NONCONVERTING_P (decl) = 1;
8275 else if (DECL_CONSTRUCTOR_P (decl))
8277 /* The constructor can be called with exactly one
8278 parameter if there is at least one parameter, and
8279 any subsequent parameters have default arguments.
8280 Ignore any compiler-added parms. */
8281 tree arg_types = FUNCTION_FIRST_USER_PARMTYPE (decl);
8283 if (arg_types == void_list_node
8285 && TREE_CHAIN (arg_types)
8286 && TREE_CHAIN (arg_types) != void_list_node
8287 && !TREE_PURPOSE (TREE_CHAIN (arg_types))))
8288 DECL_NONCONVERTING_P (decl) = 1;
8291 else if (TREE_CODE (type) == METHOD_TYPE)
8293 /* We only get here for friend declarations of
8294 members of other classes. */
8295 /* All method decls are public, so tell grokfndecl to set
8296 TREE_PUBLIC, also. */
8297 decl = grokfndecl (ctype, type,
8298 TREE_CODE (unqualified_id) != TEMPLATE_ID_EXPR
8299 ? unqualified_id : dname,
8302 virtualp, flags, memfn_quals, raises,
8303 friendp ? -1 : 0, friendp, 1, 0, sfk,
8304 funcdef_flag, template_count, in_namespace,
8306 if (decl == NULL_TREE)
8307 return error_mark_node;
8309 else if (!staticp && !dependent_type_p (type)
8310 && !COMPLETE_TYPE_P (complete_type (type))
8311 && (TREE_CODE (type) != ARRAY_TYPE || initialized == 0))
8314 error ("field %qD has incomplete type", unqualified_id);
8316 error ("name %qT has incomplete type", type);
8318 /* If we're instantiating a template, tell them which
8319 instantiation made the field's type be incomplete. */
8320 if (current_class_type
8321 && TYPE_NAME (current_class_type)
8322 && IDENTIFIER_TEMPLATE (TYPE_IDENTIFIER (current_class_type))
8324 && declspecs->type == type)
8325 error (" in instantiation of template %qT",
8326 current_class_type);
8328 type = error_mark_node;
8335 error ("%qE is neither function nor member function; "
8336 "cannot be declared friend", unqualified_id);
8344 /* Friends are treated specially. */
8345 if (ctype == current_class_type)
8346 ; /* We already issued a pedwarn. */
8347 else if (decl && DECL_NAME (decl))
8349 if (template_class_depth (current_class_type) == 0)
8351 decl = check_explicit_specialization
8352 (unqualified_id, decl, template_count,
8353 2 * funcdef_flag + 4);
8354 if (decl == error_mark_node)
8355 return error_mark_node;
8358 decl = do_friend (ctype, unqualified_id, decl,
8364 return error_mark_node;
8367 /* Structure field. It may not be a function, except for C++. */
8369 if (decl == NULL_TREE)
8375 /* An attempt is being made to initialize a non-static
8376 member. But, from [class.mem]:
8378 4 A member-declarator can contain a
8379 constant-initializer only if it declares a static
8380 member (_class.static_) of integral or enumeration
8381 type, see _class.static.data_.
8383 This used to be relatively common practice, but
8384 the rest of the compiler does not correctly
8385 handle the initialization unless the member is
8386 static so we make it static below. */
8387 pedwarn ("ISO C++ forbids initialization of member %qD",
8389 pedwarn ("making %qD static", unqualified_id);
8393 if (uses_template_parms (type))
8394 /* We'll check at instantiation time. */
8396 else if (check_static_variable_definition (unqualified_id,
8398 /* If we just return the declaration, crashes
8399 will sometimes occur. We therefore return
8400 void_type_node, as if this was a friend
8401 declaration, to cause callers to completely
8402 ignore this declaration. */
8403 return error_mark_node;
8408 /* C++ allows static class members. All other work
8409 for this is done by grokfield. */
8410 decl = build_lang_decl (VAR_DECL, unqualified_id, type);
8411 set_linkage_for_static_data_member (decl);
8412 /* Even if there is an in-class initialization, DECL
8413 is considered undefined until an out-of-class
8414 definition is provided. */
8415 DECL_EXTERNAL (decl) = 1;
8419 if (targetm.have_tls)
8420 DECL_TLS_MODEL (decl) = decl_default_tls_model (decl);
8422 /* A mere warning is sure to result in improper
8423 semantics at runtime. Don't bother to allow this to
8425 error ("thread-local storage not supported for this target");
8430 decl = build_decl (FIELD_DECL, unqualified_id, type);
8431 DECL_NONADDRESSABLE_P (decl) = bitfield;
8432 if (storage_class == sc_mutable)
8434 DECL_MUTABLE_P (decl) = 1;
8435 storage_class = sc_none;
8439 bad_specifiers (decl, "field", virtualp,
8440 memfn_quals != TYPE_UNQUALIFIED,
8441 inlinep, friendp, raises != NULL_TREE);
8444 else if (TREE_CODE (type) == FUNCTION_TYPE
8445 || TREE_CODE (type) == METHOD_TYPE)
8450 if (!unqualified_id)
8451 return error_mark_node;
8453 if (TREE_CODE (unqualified_id) == TEMPLATE_ID_EXPR)
8454 original_name = dname;
8456 original_name = unqualified_id;
8458 if (storage_class == sc_auto)
8459 error ("storage class %<auto%> invalid for function %qs", name);
8460 else if (storage_class == sc_register)
8461 error ("storage class %<register%> invalid for function %qs", name);
8463 error ("storage class %<__thread%> invalid for function %qs", name);
8465 /* Function declaration not at top level.
8466 Storage classes other than `extern' are not allowed
8467 and `extern' makes no difference. */
8468 if (! toplevel_bindings_p ()
8469 && (storage_class == sc_static
8470 || declspecs->specs[(int)ds_inline])
8473 if (storage_class == sc_static)
8474 pedwarn ("%<static%> specified invalid for function %qs "
8475 "declared out of global scope", name);
8477 pedwarn ("%<inline%> specifier invalid for function %qs "
8478 "declared out of global scope", name);
8481 if (ctype == NULL_TREE)
8485 error ("virtual non-class function %qs", name);
8489 else if (TREE_CODE (type) == FUNCTION_TYPE && staticp < 2
8490 && !NEW_DELETE_OPNAME_P (original_name))
8491 type = build_method_type_directly (ctype,
8493 TYPE_ARG_TYPES (type));
8495 /* Record presence of `static'. */
8496 publicp = (ctype != NULL_TREE
8497 || storage_class == sc_extern
8498 || storage_class != sc_static);
8500 decl = grokfndecl (ctype, type, original_name, parms, unqualified_id,
8501 virtualp, flags, memfn_quals, raises,
8503 publicp, inlinep, sfk, funcdef_flag,
8504 template_count, in_namespace, attrlist);
8505 if (decl == NULL_TREE)
8506 return error_mark_node;
8510 int invalid_static = 0;
8512 /* Don't allow a static member function in a class, and forbid
8513 declaring main to be static. */
8514 if (TREE_CODE (type) == METHOD_TYPE)
8516 pedwarn ("cannot declare member function %qD to have "
8517 "static linkage", decl);
8520 else if (current_function_decl)
8522 /* FIXME need arm citation */
8523 error ("cannot declare static function inside another function");
8530 storage_class = sc_none;
8536 /* It's a variable. */
8538 /* An uninitialized decl with `extern' is a reference. */
8539 decl = grokvardecl (type, unqualified_id,
8542 (type_quals & TYPE_QUAL_CONST) != 0,
8543 ctype ? ctype : in_namespace);
8544 bad_specifiers (decl, "variable", virtualp,
8545 memfn_quals != TYPE_UNQUALIFIED,
8546 inlinep, friendp, raises != NULL_TREE);
8550 DECL_CONTEXT (decl) = ctype;
8553 pedwarn ("%<static%> may not be used when defining "
8554 "(as opposed to declaring) a static data member");
8556 storage_class = sc_none;
8558 if (storage_class == sc_register && TREE_STATIC (decl))
8560 error ("static member %qD declared %<register%>", decl);
8561 storage_class = sc_none;
8563 if (storage_class == sc_extern && pedantic)
8565 pedwarn ("cannot explicitly declare member %q#D to have "
8568 storage_class = sc_none;
8573 /* Record `register' declaration for warnings on &
8574 and in case doing stupid register allocation. */
8576 if (storage_class == sc_register)
8577 DECL_REGISTER (decl) = 1;
8578 else if (storage_class == sc_extern)
8579 DECL_THIS_EXTERN (decl) = 1;
8580 else if (storage_class == sc_static)
8581 DECL_THIS_STATIC (decl) = 1;
8583 /* Record constancy and volatility. There's no need to do this
8584 when processing a template; we'll do this for the instantiated
8585 declaration based on the type of DECL. */
8586 if (!processing_template_decl)
8587 cp_apply_type_quals_to_decl (type_quals, decl);
8593 /* Subroutine of start_function. Ensure that each of the parameter
8594 types (as listed in PARMS) is complete, as is required for a
8595 function definition. */
8598 require_complete_types_for_parms (tree parms)
8600 for (; parms; parms = TREE_CHAIN (parms))
8602 if (dependent_type_p (TREE_TYPE (parms)))
8604 if (!VOID_TYPE_P (TREE_TYPE (parms))
8605 && complete_type_or_else (TREE_TYPE (parms), parms))
8607 relayout_decl (parms);
8608 DECL_ARG_TYPE (parms) = type_passed_as (TREE_TYPE (parms));
8611 /* grokparms or complete_type_or_else will have already issued
8613 TREE_TYPE (parms) = error_mark_node;
8617 /* Returns nonzero if T is a local variable. */
8620 local_variable_p (tree t)
8622 if ((TREE_CODE (t) == VAR_DECL
8623 /* A VAR_DECL with a context that is a _TYPE is a static data
8625 && !TYPE_P (CP_DECL_CONTEXT (t))
8626 /* Any other non-local variable must be at namespace scope. */
8627 && !DECL_NAMESPACE_SCOPE_P (t))
8628 || (TREE_CODE (t) == PARM_DECL))
8634 /* Returns nonzero if T is an automatic local variable or a label.
8635 (These are the declarations that need to be remapped when the code
8636 containing them is duplicated.) */
8639 nonstatic_local_decl_p (tree t)
8641 return ((local_variable_p (t) && !TREE_STATIC (t))
8642 || TREE_CODE (t) == LABEL_DECL
8643 || TREE_CODE (t) == RESULT_DECL);
8646 /* Like local_variable_p, but suitable for use as a tree-walking
8650 local_variable_p_walkfn (tree *tp, int *walk_subtrees,
8651 void *data ATTRIBUTE_UNUSED)
8653 if (local_variable_p (*tp) && !DECL_ARTIFICIAL (*tp))
8655 else if (TYPE_P (*tp))
8662 /* Check that ARG, which is a default-argument expression for a
8663 parameter DECL, is valid. Returns ARG, or ERROR_MARK_NODE, if
8664 something goes wrong. DECL may also be a _TYPE node, rather than a
8665 DECL, if there is no DECL available. */
8668 check_default_argument (tree decl, tree arg)
8673 if (TREE_CODE (arg) == DEFAULT_ARG)
8674 /* We get a DEFAULT_ARG when looking at an in-class declaration
8675 with a default argument. Ignore the argument for now; we'll
8676 deal with it after the class is complete. */
8685 decl_type = TREE_TYPE (decl);
8687 if (arg == error_mark_node
8688 || decl == error_mark_node
8689 || TREE_TYPE (arg) == error_mark_node
8690 || decl_type == error_mark_node)
8691 /* Something already went wrong. There's no need to check
8693 return error_mark_node;
8695 /* [dcl.fct.default]
8697 A default argument expression is implicitly converted to the
8699 if (!TREE_TYPE (arg)
8700 || !can_convert_arg (decl_type, TREE_TYPE (arg), arg, LOOKUP_NORMAL))
8703 error ("default argument for %q#D has type %qT",
8704 decl, TREE_TYPE (arg));
8706 error ("default argument for parameter of type %qT has type %qT",
8707 decl_type, TREE_TYPE (arg));
8709 return error_mark_node;
8712 /* [dcl.fct.default]
8714 Local variables shall not be used in default argument
8717 The keyword `this' shall not be used in a default argument of a
8719 var = walk_tree_without_duplicates (&arg, local_variable_p_walkfn,
8723 error ("default argument %qE uses local variable %qD", arg, var);
8724 return error_mark_node;
8731 /* Decode the list of parameter types for a function type.
8732 Given the list of things declared inside the parens,
8733 return a list of types.
8735 If this parameter does not end with an ellipsis, we append
8738 *PARMS is set to the chain of PARM_DECLs created. */
8741 grokparms (cp_parameter_declarator *first_parm, tree *parms)
8743 tree result = NULL_TREE;
8744 tree decls = NULL_TREE;
8745 int ellipsis = !first_parm || first_parm->ellipsis_p;
8746 cp_parameter_declarator *parm;
8749 for (parm = first_parm; parm != NULL; parm = parm->next)
8751 tree type = NULL_TREE;
8752 tree init = parm->default_argument;
8756 if (parm == no_parameters)
8759 attrs = parm->decl_specifiers.attributes;
8760 parm->decl_specifiers.attributes = NULL_TREE;
8761 decl = grokdeclarator (parm->declarator, &parm->decl_specifiers,
8762 PARM, init != NULL_TREE, &attrs);
8763 if (! decl || TREE_TYPE (decl) == error_mark_node)
8767 cplus_decl_attributes (&decl, attrs, 0);
8769 type = TREE_TYPE (decl);
8770 if (VOID_TYPE_P (type))
8772 if (same_type_p (type, void_type_node)
8773 && DECL_SELF_REFERENCE_P (type)
8774 && !DECL_NAME (decl) && !result && !parm->next && !ellipsis)
8775 /* this is a parmlist of `(void)', which is ok. */
8777 cxx_incomplete_type_error (decl, type);
8778 /* It's not a good idea to actually create parameters of
8779 type `void'; other parts of the compiler assume that a
8780 void type terminates the parameter list. */
8781 type = error_mark_node;
8782 TREE_TYPE (decl) = error_mark_node;
8785 if (type != error_mark_node)
8787 /* Top-level qualifiers on the parameters are
8788 ignored for function types. */
8789 type = cp_build_qualified_type (type, 0);
8790 if (TREE_CODE (type) == METHOD_TYPE)
8792 error ("parameter %qD invalidly declared method type", decl);
8793 type = build_pointer_type (type);
8794 TREE_TYPE (decl) = type;
8796 else if (abstract_virtuals_error (decl, type))
8797 any_error = 1; /* Seems like a good idea. */
8798 else if (POINTER_TYPE_P (type))
8800 /* [dcl.fct]/6, parameter types cannot contain pointers
8801 (references) to arrays of unknown bound. */
8802 tree t = TREE_TYPE (type);
8803 int ptr = TYPE_PTR_P (type);
8809 else if (TREE_CODE (t) != ARRAY_TYPE)
8811 else if (!TYPE_DOMAIN (t))
8815 if (TREE_CODE (t) == ARRAY_TYPE)
8816 error ("parameter %qD includes %s to array of unknown "
8818 decl, ptr ? "pointer" : "reference", t);
8823 else if (init && !processing_template_decl)
8824 init = check_default_argument (decl, init);
8827 TREE_CHAIN (decl) = decls;
8829 result = tree_cons (init, type, result);
8831 decls = nreverse (decls);
8832 result = nreverse (result);
8834 result = chainon (result, void_list_node);
8841 /* D is a constructor or overloaded `operator='.
8843 Let T be the class in which D is declared. Then, this function
8846 -1 if D's is an ill-formed constructor or copy assignment operator
8847 whose first parameter is of type `T'.
8848 0 if D is not a copy constructor or copy assignment
8850 1 if D is a copy constructor or copy assignment operator whose
8851 first parameter is a reference to const qualified T.
8852 2 if D is a copy constructor or copy assignment operator whose
8853 first parameter is a reference to non-const qualified T.
8855 This function can be used as a predicate. Positive values indicate
8856 a copy constructor and nonzero values indicate a copy assignment
8866 if (!DECL_FUNCTION_MEMBER_P (d))
8867 /* Non-members are invalid. We complained, but kept the declaration. */
8870 if (TREE_CODE (d) == TEMPLATE_DECL
8871 || (DECL_TEMPLATE_INFO (d)
8872 && DECL_MEMBER_TEMPLATE_P (DECL_TI_TEMPLATE (d))))
8873 /* Instantiations of template member functions are never copy
8874 functions. Note that member functions of templated classes are
8875 represented as template functions internally, and we must
8876 accept those as copy functions. */
8879 args = FUNCTION_FIRST_USER_PARMTYPE (d);
8883 arg_type = TREE_VALUE (args);
8884 if (arg_type == error_mark_node)
8887 if (TYPE_MAIN_VARIANT (arg_type) == DECL_CONTEXT (d))
8889 /* Pass by value copy assignment operator. */
8892 else if (TREE_CODE (arg_type) == REFERENCE_TYPE
8893 && TYPE_MAIN_VARIANT (TREE_TYPE (arg_type)) == DECL_CONTEXT (d))
8895 if (CP_TYPE_CONST_P (TREE_TYPE (arg_type)))
8901 args = TREE_CHAIN (args);
8903 if (args && args != void_list_node && !TREE_PURPOSE (args))
8904 /* There are more non-optional args. */
8910 /* Remember any special properties of member function DECL. */
8912 void grok_special_member_properties (tree decl)
8916 if (!DECL_NONSTATIC_MEMBER_FUNCTION_P (decl))
8919 class_type = DECL_CONTEXT (decl);
8920 if (DECL_CONSTRUCTOR_P (decl))
8922 int ctor = copy_fn_p (decl);
8924 TYPE_HAS_CONSTRUCTOR (class_type) = 1;
8930 A non-template constructor for class X is a copy
8931 constructor if its first parameter is of type X&, const
8932 X&, volatile X& or const volatile X&, and either there
8933 are no other parameters or else all other parameters have
8934 default arguments. */
8935 TYPE_HAS_INIT_REF (class_type) = 1;
8937 TYPE_HAS_CONST_INIT_REF (class_type) = 1;
8939 else if (sufficient_parms_p (FUNCTION_FIRST_USER_PARMTYPE (decl)))
8940 TYPE_HAS_DEFAULT_CONSTRUCTOR (class_type) = 1;
8942 else if (DECL_OVERLOADED_OPERATOR_P (decl) == NOP_EXPR)
8946 A non-template assignment operator for class X is a copy
8947 assignment operator if its parameter is of type X, X&, const
8948 X&, volatile X& or const volatile X&. */
8950 int assop = copy_fn_p (decl);
8954 TYPE_HAS_ASSIGN_REF (class_type) = 1;
8956 TYPE_HAS_CONST_ASSIGN_REF (class_type) = 1;
8961 /* Check a constructor DECL has the correct form. Complains
8962 if the class has a constructor of the form X(X). */
8965 grok_ctor_properties (tree ctype, tree decl)
8967 int ctor_parm = copy_fn_p (decl);
8973 A declaration of a constructor for a class X is ill-formed if
8974 its first parameter is of type (optionally cv-qualified) X
8975 and either there are no other parameters or else all other
8976 parameters have default arguments.
8978 We *don't* complain about member template instantiations that
8979 have this form, though; they can occur as we try to decide
8980 what constructor to use during overload resolution. Since
8981 overload resolution will never prefer such a constructor to
8982 the non-template copy constructor (which is either explicitly
8983 or implicitly defined), there's no need to worry about their
8984 existence. Theoretically, they should never even be
8985 instantiated, but that's hard to forestall. */
8986 error ("invalid constructor; you probably meant %<%T (const %T&)%>",
8994 /* An operator with this code is unary, but can also be binary. */
8997 ambi_op_p (enum tree_code code)
8999 return (code == INDIRECT_REF
9000 || code == ADDR_EXPR
9001 || code == UNARY_PLUS_EXPR
9002 || code == NEGATE_EXPR
9003 || code == PREINCREMENT_EXPR
9004 || code == PREDECREMENT_EXPR);
9007 /* An operator with this name can only be unary. */
9010 unary_op_p (enum tree_code code)
9012 return (code == TRUTH_NOT_EXPR
9013 || code == BIT_NOT_EXPR
9014 || code == COMPONENT_REF
9015 || code == TYPE_EXPR);
9018 /* DECL is a declaration for an overloaded operator. If COMPLAIN is true,
9019 errors are issued for invalid declarations. */
9022 grok_op_properties (tree decl, bool complain)
9024 tree argtypes = TYPE_ARG_TYPES (TREE_TYPE (decl));
9026 int methodp = (TREE_CODE (TREE_TYPE (decl)) == METHOD_TYPE);
9027 tree name = DECL_NAME (decl);
9028 enum tree_code operator_code;
9033 /* Count the number of arguments and check for ellipsis. */
9034 for (argtype = argtypes, arity = 0;
9035 argtype && argtype != void_list_node;
9036 argtype = TREE_CHAIN (argtype))
9038 ellipsis_p = !argtype;
9040 class_type = DECL_CONTEXT (decl);
9041 if (class_type && !CLASS_TYPE_P (class_type))
9042 class_type = NULL_TREE;
9044 if (DECL_CONV_FN_P (decl))
9045 operator_code = TYPE_EXPR;
9049 #define DEF_OPERATOR(NAME, CODE, MANGLING, ARITY, ASSN_P) \
9050 if (ansi_opname (CODE) == name) \
9052 operator_code = (CODE); \
9055 else if (ansi_assopname (CODE) == name) \
9057 operator_code = (CODE); \
9058 DECL_ASSIGNMENT_OPERATOR_P (decl) = 1; \
9062 #include "operators.def"
9068 gcc_assert (operator_code != LAST_CPLUS_TREE_CODE);
9069 SET_OVERLOADED_OPERATOR_CODE (decl, operator_code);
9072 switch (operator_code)
9075 TYPE_HAS_NEW_OPERATOR (class_type) = 1;
9079 TYPE_GETS_DELETE (class_type) |= 1;
9083 TYPE_HAS_ARRAY_NEW_OPERATOR (class_type) = 1;
9086 case VEC_DELETE_EXPR:
9087 TYPE_GETS_DELETE (class_type) |= 2;
9094 /* [basic.std.dynamic.allocation]/1:
9096 A program is ill-formed if an allocation function is declared
9097 in a namespace scope other than global scope or declared static
9100 The same also holds true for deallocation functions. */
9101 if (operator_code == NEW_EXPR || operator_code == VEC_NEW_EXPR
9102 || operator_code == DELETE_EXPR || operator_code == VEC_DELETE_EXPR)
9104 if (DECL_NAMESPACE_SCOPE_P (decl))
9106 if (CP_DECL_CONTEXT (decl) != global_namespace)
9107 error ("%qD may not be declared within a namespace", decl);
9108 else if (!TREE_PUBLIC (decl))
9109 error ("%qD may not be declared as static", decl);
9113 if (operator_code == NEW_EXPR || operator_code == VEC_NEW_EXPR)
9114 TREE_TYPE (decl) = coerce_new_type (TREE_TYPE (decl));
9115 else if (operator_code == DELETE_EXPR || operator_code == VEC_DELETE_EXPR)
9116 TREE_TYPE (decl) = coerce_delete_type (TREE_TYPE (decl));
9119 /* An operator function must either be a non-static member function
9120 or have at least one parameter of a class, a reference to a class,
9121 an enumeration, or a reference to an enumeration. 13.4.0.6 */
9122 if (! methodp || DECL_STATIC_FUNCTION_P (decl))
9124 if (operator_code == TYPE_EXPR
9125 || operator_code == CALL_EXPR
9126 || operator_code == COMPONENT_REF
9127 || operator_code == ARRAY_REF
9128 || operator_code == NOP_EXPR)
9130 error ("%qD must be a nonstatic member function", decl);
9137 if (DECL_STATIC_FUNCTION_P (decl))
9139 error ("%qD must be either a non-static member "
9140 "function or a non-member function", decl);
9144 for (p = argtypes; p && p != void_list_node; p = TREE_CHAIN (p))
9146 tree arg = non_reference (TREE_VALUE (p));
9147 if (arg == error_mark_node)
9150 /* IS_AGGR_TYPE, rather than CLASS_TYPE_P, is used
9151 because these checks are performed even on
9152 template functions. */
9153 if (IS_AGGR_TYPE (arg) || TREE_CODE (arg) == ENUMERAL_TYPE)
9157 if (!p || p == void_list_node)
9162 error ("%qD must have an argument of class or "
9169 /* There are no restrictions on the arguments to an overloaded
9171 if (operator_code == CALL_EXPR)
9174 /* Warn about conversion operators that will never be used. */
9175 if (IDENTIFIER_TYPENAME_P (name)
9176 && ! DECL_TEMPLATE_INFO (decl)
9178 /* Warn only declaring the function; there is no need to
9179 warn again about out-of-class definitions. */
9180 && class_type == current_class_type)
9182 tree t = TREE_TYPE (name);
9183 int ref = (TREE_CODE (t) == REFERENCE_TYPE);
9184 const char *what = 0;
9187 t = TYPE_MAIN_VARIANT (TREE_TYPE (t));
9189 if (TREE_CODE (t) == VOID_TYPE)
9191 else if (class_type)
9193 if (t == class_type)
9194 what = "the same type";
9195 /* Don't force t to be complete here. */
9196 else if (IS_AGGR_TYPE (t)
9197 && COMPLETE_TYPE_P (t)
9198 && DERIVED_FROM_P (t, class_type))
9199 what = "a base class";
9203 warning (OPT_Wconversion, "conversion to %s%s will never use a type "
9204 "conversion operator",
9205 ref ? "a reference to " : "", what);
9208 if (operator_code == COND_EXPR)
9211 error ("ISO C++ prohibits overloading operator ?:");
9213 else if (ellipsis_p)
9214 error ("%qD must not have variable number of arguments", decl);
9215 else if (ambi_op_p (operator_code))
9218 /* We pick the one-argument operator codes by default, so
9219 we don't have to change anything. */
9221 else if (arity == 2)
9223 /* If we thought this was a unary operator, we now know
9224 it to be a binary operator. */
9225 switch (operator_code)
9228 operator_code = MULT_EXPR;
9232 operator_code = BIT_AND_EXPR;
9235 case UNARY_PLUS_EXPR:
9236 operator_code = PLUS_EXPR;
9240 operator_code = MINUS_EXPR;
9243 case PREINCREMENT_EXPR:
9244 operator_code = POSTINCREMENT_EXPR;
9247 case PREDECREMENT_EXPR:
9248 operator_code = POSTDECREMENT_EXPR;
9255 SET_OVERLOADED_OPERATOR_CODE (decl, operator_code);
9257 if ((operator_code == POSTINCREMENT_EXPR
9258 || operator_code == POSTDECREMENT_EXPR)
9259 && ! processing_template_decl
9260 && ! same_type_p (TREE_VALUE (TREE_CHAIN (argtypes)), integer_type_node))
9263 error ("postfix %qD must take %<int%> as its argument",
9267 ("postfix %qD must take %<int%> as its second argument",
9274 error ("%qD must take either zero or one argument", decl);
9276 error ("%qD must take either one or two arguments", decl);
9279 /* More Effective C++ rule 6. */
9281 && (operator_code == POSTINCREMENT_EXPR
9282 || operator_code == POSTDECREMENT_EXPR
9283 || operator_code == PREINCREMENT_EXPR
9284 || operator_code == PREDECREMENT_EXPR))
9286 tree arg = TREE_VALUE (argtypes);
9287 tree ret = TREE_TYPE (TREE_TYPE (decl));
9288 if (methodp || TREE_CODE (arg) == REFERENCE_TYPE)
9289 arg = TREE_TYPE (arg);
9290 arg = TYPE_MAIN_VARIANT (arg);
9291 if (operator_code == PREINCREMENT_EXPR
9292 || operator_code == PREDECREMENT_EXPR)
9294 if (TREE_CODE (ret) != REFERENCE_TYPE
9295 || !same_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (ret)),
9297 warning (OPT_Weffc__, "prefix %qD should return %qT", decl,
9298 build_reference_type (arg));
9302 if (!same_type_p (TYPE_MAIN_VARIANT (ret), arg))
9303 warning (OPT_Weffc__, "postfix %qD should return %qT", decl, arg);
9307 else if (unary_op_p (operator_code))
9312 error ("%qD must take %<void%>", decl);
9314 error ("%qD must take exactly one argument", decl);
9317 else /* if (binary_op_p (operator_code)) */
9322 error ("%qD must take exactly one argument", decl);
9324 error ("%qD must take exactly two arguments", decl);
9327 /* More Effective C++ rule 7. */
9329 && (operator_code == TRUTH_ANDIF_EXPR
9330 || operator_code == TRUTH_ORIF_EXPR
9331 || operator_code == COMPOUND_EXPR))
9332 warning (OPT_Weffc__, "user-defined %qD always evaluates both arguments",
9336 /* Effective C++ rule 23. */
9339 && !DECL_ASSIGNMENT_OPERATOR_P (decl)
9340 && (operator_code == PLUS_EXPR
9341 || operator_code == MINUS_EXPR
9342 || operator_code == TRUNC_DIV_EXPR
9343 || operator_code == MULT_EXPR
9344 || operator_code == TRUNC_MOD_EXPR)
9345 && TREE_CODE (TREE_TYPE (TREE_TYPE (decl))) == REFERENCE_TYPE)
9346 warning (OPT_Weffc__, "%qD should return by value", decl);
9349 for (; argtypes && argtypes != void_list_node;
9350 argtypes = TREE_CHAIN (argtypes))
9351 if (TREE_PURPOSE (argtypes))
9353 TREE_PURPOSE (argtypes) = NULL_TREE;
9354 if (operator_code == POSTINCREMENT_EXPR
9355 || operator_code == POSTDECREMENT_EXPR)
9358 pedwarn ("%qD cannot have default arguments", decl);
9361 error ("%qD cannot have default arguments", decl);
9368 /* Return a string giving the keyword associate with CODE. */
9371 tag_name (enum tag_types code)
9390 /* Name lookup in an elaborated-type-specifier (after the keyword
9391 indicated by TAG_CODE) has found the TYPE_DECL DECL. If the
9392 elaborated-type-specifier is invalid, issue a diagnostic and return
9393 error_mark_node; otherwise, return the *_TYPE to which it referred.
9394 If ALLOW_TEMPLATE_P is true, TYPE may be a class template. */
9397 check_elaborated_type_specifier (enum tag_types tag_code,
9399 bool allow_template_p)
9405 struct S { struct S *p; };
9407 name lookup will find the TYPE_DECL for the implicit "S::S"
9408 typedef. Adjust for that here. */
9409 if (DECL_SELF_REFERENCE_P (decl))
9410 decl = TYPE_NAME (TREE_TYPE (decl));
9412 type = TREE_TYPE (decl);
9414 /* Check TEMPLATE_TYPE_PARM first because DECL_IMPLICIT_TYPEDEF_P
9415 is false for this case as well. */
9416 if (TREE_CODE (type) == TEMPLATE_TYPE_PARM)
9418 error ("using template type parameter %qT after %qs",
9419 type, tag_name (tag_code));
9420 return error_mark_node;
9424 If the identifier resolves to a typedef-name or a template
9425 type-parameter, the elaborated-type-specifier is ill-formed.
9427 In other words, the only legitimate declaration to use in the
9428 elaborated type specifier is the implicit typedef created when
9429 the type is declared. */
9430 else if (!DECL_IMPLICIT_TYPEDEF_P (decl)
9431 && tag_code != typename_type)
9433 error ("using typedef-name %qD after %qs", decl, tag_name (tag_code));
9434 error ("%q+D has a previous declaration here", decl);
9435 return error_mark_node;
9437 else if (TREE_CODE (type) != RECORD_TYPE
9438 && TREE_CODE (type) != UNION_TYPE
9439 && tag_code != enum_type
9440 && tag_code != typename_type)
9442 error ("%qT referred to as %qs", type, tag_name (tag_code));
9443 error ("%q+T has a previous declaration here", type);
9444 return error_mark_node;
9446 else if (TREE_CODE (type) != ENUMERAL_TYPE
9447 && tag_code == enum_type)
9449 error ("%qT referred to as enum", type);
9450 error ("%q+T has a previous declaration here", type);
9451 return error_mark_node;
9453 else if (!allow_template_p
9454 && TREE_CODE (type) == RECORD_TYPE
9455 && CLASSTYPE_IS_TEMPLATE (type))
9457 /* If a class template appears as elaborated type specifier
9458 without a template header such as:
9460 template <class T> class C {};
9461 void f(class C); // No template header here
9463 then the required template argument is missing. */
9464 error ("template argument required for %<%s %T%>",
9465 tag_name (tag_code),
9466 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type)));
9467 return error_mark_node;
9473 /* Lookup NAME in elaborate type specifier in scope according to
9474 SCOPE and issue diagnostics if necessary.
9475 Return *_TYPE node upon success, NULL_TREE when the NAME is not
9476 found, and ERROR_MARK_NODE for type error. */
9479 lookup_and_check_tag (enum tag_types tag_code, tree name,
9480 tag_scope scope, bool template_header_p)
9484 if (scope == ts_global)
9486 /* First try ordinary name lookup, ignoring hidden class name
9487 injected via friend declaration. */
9488 decl = lookup_name_prefer_type (name, 2);
9489 /* If that fails, the name will be placed in the smallest
9490 non-class, non-function-prototype scope according to 3.3.1/5.
9491 We may already have a hidden name declared as friend in this
9492 scope. So lookup again but not ignoring hidden name.
9493 If we find one, that name will be made visible rather than
9494 creating a new tag. */
9496 decl = lookup_type_scope (name, ts_within_enclosing_non_class);
9499 decl = lookup_type_scope (name, scope);
9501 if (decl && DECL_CLASS_TEMPLATE_P (decl))
9502 decl = DECL_TEMPLATE_RESULT (decl);
9504 if (decl && TREE_CODE (decl) == TYPE_DECL)
9506 /* Look for invalid nested type:
9510 if (scope == ts_current && DECL_SELF_REFERENCE_P (decl))
9512 error ("%qD has the same name as the class in which it is "
9515 return error_mark_node;
9518 /* Two cases we need to consider when deciding if a class
9519 template is allowed as an elaborated type specifier:
9520 1. It is a self reference to its own class.
9521 2. It comes with a template header.
9525 template <class T> class C {
9526 class C *c1; // DECL_SELF_REFERENCE_P is true
9529 template <class U> class C; // template_header_p is true
9530 template <class T> class C<T>::D {
9531 class C *c2; // DECL_SELF_REFERENCE_P is true
9534 t = check_elaborated_type_specifier (tag_code,
9537 | DECL_SELF_REFERENCE_P (decl));
9544 /* Get the struct, enum or union (TAG_CODE says which) with tag NAME.
9545 Define the tag as a forward-reference if it is not defined.
9547 If a declaration is given, process it here, and report an error if
9548 multiple declarations are not identical.
9550 SCOPE is TS_CURRENT when this is also a definition. Only look in
9551 the current frame for the name (since C++ allows new names in any
9552 scope.) It is TS_WITHIN_ENCLOSING_NON_CLASS if this is a friend
9553 declaration. Only look beginning from the current scope outward up
9554 till the nearest non-class scope. Otherwise it is TS_GLOBAL.
9556 TEMPLATE_HEADER_P is true when this declaration is preceded by
9557 a set of template parameters. */
9560 xref_tag (enum tag_types tag_code, tree name,
9561 tag_scope scope, bool template_header_p)
9563 enum tree_code code;
9565 tree context = NULL_TREE;
9567 timevar_push (TV_NAME_LOOKUP);
9569 gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE);
9581 code = ENUMERAL_TYPE;
9587 /* In case of anonymous name, xref_tag is only called to
9588 make type node and push name. Name lookup is not required. */
9589 if (ANON_AGGRNAME_P (name))
9592 t = lookup_and_check_tag (tag_code, name,
9593 scope, template_header_p);
9595 if (t == error_mark_node)
9596 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
9598 if (scope != ts_current && t && current_class_type
9599 && template_class_depth (current_class_type)
9600 && template_header_p)
9602 /* Since SCOPE is not TS_CURRENT, we are not looking at a
9603 definition of this tag. Since, in addition, we are currently
9604 processing a (member) template declaration of a template
9605 class, we must be very careful; consider:
9612 { template <class V>
9613 friend struct S1; };
9615 Here, the S2::S1 declaration should not be confused with the
9616 outer declaration. In particular, the inner version should
9617 have a template parameter of level 2, not level 1. This
9618 would be particularly important if the member declaration
9621 template <class V = U> friend struct S1;
9623 say, when we should tsubst into `U' when instantiating
9624 S2. On the other hand, when presented with:
9634 we must find the inner binding eventually. We
9635 accomplish this by making sure that the new type we
9636 create to represent this declaration has the right
9638 context = TYPE_CONTEXT (t);
9644 /* If no such tag is yet defined, create a forward-reference node
9645 and record it as the "definition".
9646 When a real declaration of this type is found,
9647 the forward-reference will be altered into a real type. */
9648 if (code == ENUMERAL_TYPE)
9650 error ("use of enum %q#D without previous declaration", name);
9651 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
9655 t = make_aggr_type (code);
9656 TYPE_CONTEXT (t) = context;
9657 t = pushtag (name, t, scope);
9662 if (template_header_p && IS_AGGR_TYPE (t))
9663 redeclare_class_template (t, current_template_parms);
9664 else if (!processing_template_decl
9666 && CLASSTYPE_IS_TEMPLATE (t))
9668 error ("redeclaration of %qT as a non-template", t);
9669 t = error_mark_node;
9672 /* Make injected friend class visible. */
9673 if (scope != ts_within_enclosing_non_class
9674 && hidden_name_p (TYPE_NAME (t)))
9676 DECL_ANTICIPATED (TYPE_NAME (t)) = 0;
9677 DECL_FRIEND_P (TYPE_NAME (t)) = 0;
9679 if (TYPE_TEMPLATE_INFO (t))
9681 DECL_ANTICIPATED (TYPE_TI_TEMPLATE (t)) = 0;
9682 DECL_FRIEND_P (TYPE_TI_TEMPLATE (t)) = 0;
9687 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, t);
9691 xref_tag_from_type (tree old, tree id, tag_scope scope)
9693 enum tag_types tag_kind;
9695 if (TREE_CODE (old) == RECORD_TYPE)
9696 tag_kind = (CLASSTYPE_DECLARED_CLASS (old) ? class_type : record_type);
9698 tag_kind = union_type;
9700 if (id == NULL_TREE)
9701 id = TYPE_IDENTIFIER (old);
9703 return xref_tag (tag_kind, id, scope, false);
9706 /* Create the binfo hierarchy for REF with (possibly NULL) base list
9707 BASE_LIST. For each element on BASE_LIST the TREE_PURPOSE is an
9708 access_* node, and the TREE_VALUE is the type of the base-class.
9709 Non-NULL TREE_TYPE indicates virtual inheritance. */
9712 xref_basetypes (tree ref, tree base_list)
9715 tree binfo, base_binfo;
9716 unsigned max_vbases = 0; /* Maximum direct & indirect virtual bases. */
9717 unsigned max_bases = 0; /* Maximum direct bases. */
9719 tree default_access;
9720 tree igo_prev; /* Track Inheritance Graph Order. */
9722 if (ref == error_mark_node)
9725 /* The base of a derived class is private by default, all others are
9727 default_access = (TREE_CODE (ref) == RECORD_TYPE
9728 && CLASSTYPE_DECLARED_CLASS (ref)
9729 ? access_private_node : access_public_node);
9731 /* First, make sure that any templates in base-classes are
9732 instantiated. This ensures that if we call ourselves recursively
9733 we do not get confused about which classes are marked and which
9738 tree basetype = TREE_VALUE (*basep);
9740 if (!(processing_template_decl && uses_template_parms (basetype))
9741 && !complete_type_or_else (basetype, NULL))
9742 /* An incomplete type. Remove it from the list. */
9743 *basep = TREE_CHAIN (*basep);
9747 if (TREE_TYPE (*basep))
9749 if (CLASS_TYPE_P (basetype))
9750 max_vbases += VEC_length (tree, CLASSTYPE_VBASECLASSES (basetype));
9751 basep = &TREE_CHAIN (*basep);
9755 TYPE_MARKED_P (ref) = 1;
9757 /* The binfo slot should be empty, unless this is an (ill-formed)
9759 gcc_assert (!TYPE_BINFO (ref) || TYPE_SIZE (ref));
9760 gcc_assert (TYPE_MAIN_VARIANT (ref) == ref);
9762 binfo = make_tree_binfo (max_bases);
9764 TYPE_BINFO (ref) = binfo;
9765 BINFO_OFFSET (binfo) = size_zero_node;
9766 BINFO_TYPE (binfo) = ref;
9770 BINFO_BASE_ACCESSES (binfo) = VEC_alloc (tree, gc, max_bases);
9771 /* An aggregate cannot have baseclasses. */
9772 CLASSTYPE_NON_AGGREGATE (ref) = 1;
9774 if (TREE_CODE (ref) == UNION_TYPE)
9775 error ("derived union %qT invalid", ref);
9780 if (TYPE_FOR_JAVA (ref))
9781 error ("Java class %qT cannot have multiple bases", ref);
9786 CLASSTYPE_VBASECLASSES (ref) = VEC_alloc (tree, gc, max_vbases);
9788 if (TYPE_FOR_JAVA (ref))
9789 error ("Java class %qT cannot have virtual bases", ref);
9792 for (igo_prev = binfo; base_list; base_list = TREE_CHAIN (base_list))
9794 tree access = TREE_PURPOSE (base_list);
9795 int via_virtual = TREE_TYPE (base_list) != NULL_TREE;
9796 tree basetype = TREE_VALUE (base_list);
9798 if (access == access_default_node)
9799 access = default_access;
9801 if (TREE_CODE (basetype) == TYPE_DECL)
9802 basetype = TREE_TYPE (basetype);
9803 if (TREE_CODE (basetype) != RECORD_TYPE
9804 && TREE_CODE (basetype) != TYPENAME_TYPE
9805 && TREE_CODE (basetype) != TEMPLATE_TYPE_PARM
9806 && TREE_CODE (basetype) != BOUND_TEMPLATE_TEMPLATE_PARM)
9808 error ("base type %qT fails to be a struct or class type",
9813 if (TYPE_FOR_JAVA (basetype) && (current_lang_depth () == 0))
9814 TYPE_FOR_JAVA (ref) = 1;
9816 base_binfo = NULL_TREE;
9817 if (CLASS_TYPE_P (basetype) && !dependent_type_p (basetype))
9819 base_binfo = TYPE_BINFO (basetype);
9820 /* The original basetype could have been a typedef'd type. */
9821 basetype = BINFO_TYPE (base_binfo);
9823 /* Inherit flags from the base. */
9824 TYPE_HAS_NEW_OPERATOR (ref)
9825 |= TYPE_HAS_NEW_OPERATOR (basetype);
9826 TYPE_HAS_ARRAY_NEW_OPERATOR (ref)
9827 |= TYPE_HAS_ARRAY_NEW_OPERATOR (basetype);
9828 TYPE_GETS_DELETE (ref) |= TYPE_GETS_DELETE (basetype);
9829 TYPE_HAS_CONVERSION (ref) |= TYPE_HAS_CONVERSION (basetype);
9830 CLASSTYPE_DIAMOND_SHAPED_P (ref)
9831 |= CLASSTYPE_DIAMOND_SHAPED_P (basetype);
9832 CLASSTYPE_REPEATED_BASE_P (ref)
9833 |= CLASSTYPE_REPEATED_BASE_P (basetype);
9836 /* We must do this test after we've seen through a typedef
9838 if (TYPE_MARKED_P (basetype))
9840 if (basetype == ref)
9841 error ("recursive type %qT undefined", basetype);
9843 error ("duplicate base type %qT invalid", basetype);
9846 TYPE_MARKED_P (basetype) = 1;
9848 base_binfo = copy_binfo (base_binfo, basetype, ref,
9849 &igo_prev, via_virtual);
9850 if (!BINFO_INHERITANCE_CHAIN (base_binfo))
9851 BINFO_INHERITANCE_CHAIN (base_binfo) = binfo;
9853 BINFO_BASE_APPEND (binfo, base_binfo);
9854 BINFO_BASE_ACCESS_APPEND (binfo, access);
9857 if (VEC_space (tree, CLASSTYPE_VBASECLASSES (ref), 1))
9858 /* If we have space in the vbase vector, we must have shared at
9859 least one of them, and are therefore diamond shaped. */
9860 CLASSTYPE_DIAMOND_SHAPED_P (ref) = 1;
9862 /* Unmark all the types. */
9863 for (i = 0; BINFO_BASE_ITERATE (binfo, i, base_binfo); i++)
9864 TYPE_MARKED_P (BINFO_TYPE (base_binfo)) = 0;
9865 TYPE_MARKED_P (ref) = 0;
9867 /* Now see if we have a repeated base type. */
9868 if (!CLASSTYPE_REPEATED_BASE_P (ref))
9870 for (base_binfo = binfo; base_binfo;
9871 base_binfo = TREE_CHAIN (base_binfo))
9873 if (TYPE_MARKED_P (BINFO_TYPE (base_binfo)))
9875 CLASSTYPE_REPEATED_BASE_P (ref) = 1;
9878 TYPE_MARKED_P (BINFO_TYPE (base_binfo)) = 1;
9880 for (base_binfo = binfo; base_binfo;
9881 base_binfo = TREE_CHAIN (base_binfo))
9882 if (TYPE_MARKED_P (BINFO_TYPE (base_binfo)))
9883 TYPE_MARKED_P (BINFO_TYPE (base_binfo)) = 0;
9890 /* Begin compiling the definition of an enumeration type.
9892 Returns the type object, as yet incomplete.
9893 Also records info about it so that build_enumerator
9894 may be used to declare the individual values as they are read. */
9897 start_enum (tree name)
9901 gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE);
9903 /* If this is the real definition for a previous forward reference,
9904 fill in the contents in the same object that used to be the
9905 forward reference. */
9907 enumtype = lookup_and_check_tag (enum_type, name,
9908 /*tag_scope=*/ts_current,
9909 /*template_header_p=*/false);
9911 if (enumtype != NULL_TREE && TREE_CODE (enumtype) == ENUMERAL_TYPE)
9913 error ("multiple definition of %q#T", enumtype);
9914 error ("%Jprevious definition here", TYPE_MAIN_DECL (enumtype));
9915 /* Clear out TYPE_VALUES, and start again. */
9916 TYPE_VALUES (enumtype) = NULL_TREE;
9920 /* In case of error, make a dummy enum to allow parsing to
9922 if (enumtype == error_mark_node)
9923 name = make_anon_name ();
9925 enumtype = make_node (ENUMERAL_TYPE);
9926 enumtype = pushtag (name, enumtype, /*tag_scope=*/ts_current);
9932 /* After processing and defining all the values of an enumeration type,
9933 install their decls in the enumeration type and finish it off.
9934 ENUMTYPE is the type object and VALUES a list of name-value pairs. */
9937 finish_enum (tree enumtype)
9946 bool use_short_enum;
9950 integer_type_kind itk;
9951 tree underlying_type = NULL_TREE;
9953 /* We built up the VALUES in reverse order. */
9954 TYPE_VALUES (enumtype) = nreverse (TYPE_VALUES (enumtype));
9956 /* For an enum defined in a template, just set the type of the values;
9957 all further processing is postponed until the template is
9958 instantiated. We need to set the type so that tsubst of a CONST_DECL
9960 if (processing_template_decl)
9962 for (values = TYPE_VALUES (enumtype);
9964 values = TREE_CHAIN (values))
9965 TREE_TYPE (TREE_VALUE (values)) = enumtype;
9966 if (at_function_scope_p ())
9967 add_stmt (build_min (TAG_DEFN, enumtype));
9971 /* Determine the minimum and maximum values of the enumerators. */
9972 if (TYPE_VALUES (enumtype))
9974 minnode = maxnode = NULL_TREE;
9976 for (values = TYPE_VALUES (enumtype);
9978 values = TREE_CHAIN (values))
9980 decl = TREE_VALUE (values);
9982 /* [dcl.enum]: Following the closing brace of an enum-specifier,
9983 each enumerator has the type of its enumeration. Prior to the
9984 closing brace, the type of each enumerator is the type of its
9985 initializing value. */
9986 TREE_TYPE (decl) = enumtype;
9988 /* Update the minimum and maximum values, if appropriate. */
9989 value = DECL_INITIAL (decl);
9990 if (value == error_mark_node)
9991 value = integer_zero_node;
9992 /* Figure out what the minimum and maximum values of the
9995 minnode = maxnode = value;
9996 else if (tree_int_cst_lt (maxnode, value))
9998 else if (tree_int_cst_lt (value, minnode))
10005 If the enumerator-list is empty, the underlying type is as if
10006 the enumeration had a single enumerator with value 0. */
10007 minnode = maxnode = integer_zero_node;
10009 /* Compute the number of bits require to represent all values of the
10010 enumeration. We must do this before the type of MINNODE and
10011 MAXNODE are transformed, since min_precision relies on the
10012 TREE_TYPE of the value it is passed. */
10013 unsignedp = tree_int_cst_sgn (minnode) >= 0;
10014 lowprec = min_precision (minnode, unsignedp);
10015 highprec = min_precision (maxnode, unsignedp);
10016 precision = MAX (lowprec, highprec);
10018 /* Determine the underlying type of the enumeration.
10022 The underlying type of an enumeration is an integral type that
10023 can represent all the enumerator values defined in the
10024 enumeration. It is implementation-defined which integral type is
10025 used as the underlying type for an enumeration except that the
10026 underlying type shall not be larger than int unless the value of
10027 an enumerator cannot fit in an int or unsigned int.
10029 We use "int" or an "unsigned int" as the underlying type, even if
10030 a smaller integral type would work, unless the user has
10031 explicitly requested that we use the smallest possible type. The
10032 user can request that for all enumerations with a command line
10033 flag, or for just one enumeration with an attribute. */
10035 use_short_enum = flag_short_enums
10036 || lookup_attribute ("packed", TYPE_ATTRIBUTES (enumtype));
10038 for (itk = (use_short_enum ? itk_char : itk_int);
10042 underlying_type = integer_types[itk];
10043 if (TYPE_PRECISION (underlying_type) >= precision
10044 && TYPE_UNSIGNED (underlying_type) == unsignedp)
10047 if (itk == itk_none)
10051 IF no integral type can represent all the enumerator values, the
10052 enumeration is ill-formed. */
10053 error ("no integral type can represent all of the enumerator values "
10054 "for %qT", enumtype);
10055 precision = TYPE_PRECISION (long_long_integer_type_node);
10056 underlying_type = integer_types[itk_unsigned_long_long];
10059 /* Compute the minium and maximum values for the type.
10063 For an enumeration where emin is the smallest enumerator and emax
10064 is the largest, the values of the enumeration are the values of the
10065 underlying type in the range bmin to bmax, where bmin and bmax are,
10066 respectively, the smallest and largest values of the smallest bit-
10067 field that can store emin and emax. */
10069 /* The middle-end currently assumes that types with TYPE_PRECISION
10070 narrower than their underlying type are suitably zero or sign
10071 extended to fill their mode. g++ doesn't make these guarantees.
10072 Until the middle-end can represent such paradoxical types, we
10073 set the TYPE_PRECISION to the width of the underlying type. */
10074 TYPE_PRECISION (enumtype) = TYPE_PRECISION (underlying_type);
10076 set_min_and_max_values_for_integral_type (enumtype, precision, unsignedp);
10080 The value of sizeof() applied to an enumeration type, an object
10081 of an enumeration type, or an enumerator, is the value of sizeof()
10082 applied to the underlying type. */
10083 TYPE_SIZE (enumtype) = TYPE_SIZE (underlying_type);
10084 TYPE_SIZE_UNIT (enumtype) = TYPE_SIZE_UNIT (underlying_type);
10085 TYPE_MODE (enumtype) = TYPE_MODE (underlying_type);
10086 TYPE_ALIGN (enumtype) = TYPE_ALIGN (underlying_type);
10087 TYPE_USER_ALIGN (enumtype) = TYPE_USER_ALIGN (underlying_type);
10088 TYPE_UNSIGNED (enumtype) = TYPE_UNSIGNED (underlying_type);
10090 /* Convert each of the enumerators to the type of the underlying
10091 type of the enumeration. */
10092 for (values = TYPE_VALUES (enumtype); values; values = TREE_CHAIN (values))
10094 location_t saved_location;
10096 decl = TREE_VALUE (values);
10097 saved_location = input_location;
10098 input_location = DECL_SOURCE_LOCATION (decl);
10099 value = perform_implicit_conversion (underlying_type,
10100 DECL_INITIAL (decl));
10101 input_location = saved_location;
10103 /* Do not clobber shared ints. */
10104 value = copy_node (value);
10106 TREE_TYPE (value) = enumtype;
10107 DECL_INITIAL (decl) = value;
10108 TREE_VALUE (values) = value;
10111 /* Fix up all variant types of this enum type. */
10112 for (t = TYPE_MAIN_VARIANT (enumtype); t; t = TYPE_NEXT_VARIANT (t))
10114 TYPE_VALUES (t) = TYPE_VALUES (enumtype);
10115 TYPE_MIN_VALUE (t) = TYPE_MIN_VALUE (enumtype);
10116 TYPE_MAX_VALUE (t) = TYPE_MAX_VALUE (enumtype);
10117 TYPE_SIZE (t) = TYPE_SIZE (enumtype);
10118 TYPE_SIZE_UNIT (t) = TYPE_SIZE_UNIT (enumtype);
10119 TYPE_MODE (t) = TYPE_MODE (enumtype);
10120 TYPE_PRECISION (t) = TYPE_PRECISION (enumtype);
10121 TYPE_ALIGN (t) = TYPE_ALIGN (enumtype);
10122 TYPE_USER_ALIGN (t) = TYPE_USER_ALIGN (enumtype);
10123 TYPE_UNSIGNED (t) = TYPE_UNSIGNED (enumtype);
10126 /* Finish debugging output for this type. */
10127 rest_of_type_compilation (enumtype, namespace_bindings_p ());
10130 /* Build and install a CONST_DECL for an enumeration constant of the
10131 enumeration type ENUMTYPE whose NAME and VALUE (if any) are provided.
10132 Assignment of sequential values by default is handled here. */
10135 build_enumerator (tree name, tree value, tree enumtype)
10141 /* If the VALUE was erroneous, pretend it wasn't there; that will
10142 result in the enum being assigned the next value in sequence. */
10143 if (value == error_mark_node)
10146 /* Remove no-op casts from the value. */
10148 STRIP_TYPE_NOPS (value);
10150 if (! processing_template_decl)
10152 /* Validate and default VALUE. */
10153 if (value != NULL_TREE)
10155 value = integral_constant_value (value);
10157 if (TREE_CODE (value) == INTEGER_CST)
10159 value = perform_integral_promotions (value);
10160 constant_expression_warning (value);
10164 error ("enumerator value for %qD not integer constant", name);
10169 /* Default based on previous value. */
10170 if (value == NULL_TREE)
10172 if (TYPE_VALUES (enumtype))
10175 unsigned HOST_WIDE_INT lo;
10179 /* The next value is the previous value plus one. We can
10180 safely assume that the previous value is an INTEGER_CST.
10181 add_double doesn't know the type of the target expression,
10182 so we must check with int_fits_type_p as well. */
10183 prev_value = DECL_INITIAL (TREE_VALUE (TYPE_VALUES (enumtype)));
10184 overflowed = add_double (TREE_INT_CST_LOW (prev_value),
10185 TREE_INT_CST_HIGH (prev_value),
10187 value = build_int_cst_wide (TREE_TYPE (prev_value), lo, hi);
10188 overflowed |= !int_fits_type_p (value, TREE_TYPE (prev_value));
10192 error ("overflow in enumeration values at %qD", name);
10193 value = error_mark_node;
10197 value = integer_zero_node;
10200 /* Remove no-op casts from the value. */
10201 STRIP_TYPE_NOPS (value);
10204 /* C++ associates enums with global, function, or class declarations. */
10205 context = current_scope ();
10207 /* Build the actual enumeration constant. Note that the enumeration
10208 constants have the type of their initializers until the
10209 enumeration is complete:
10213 Following the closing brace of an enum-specifier, each enumer-
10214 ator has the type of its enumeration. Prior to the closing
10215 brace, the type of each enumerator is the type of its
10216 initializing value.
10218 In finish_enum we will reset the type. Of course, if we're
10219 processing a template, there may be no value. */
10220 type = value ? TREE_TYPE (value) : NULL_TREE;
10222 if (context && context == current_class_type)
10223 /* This enum declaration is local to the class. We need the full
10224 lang_decl so that we can record DECL_CLASS_CONTEXT, for example. */
10225 decl = build_lang_decl (CONST_DECL, name, type);
10227 /* It's a global enum, or it's local to a function. (Note local to
10228 a function could mean local to a class method. */
10229 decl = build_decl (CONST_DECL, name, type);
10231 DECL_CONTEXT (decl) = FROB_CONTEXT (context);
10232 TREE_CONSTANT (decl) = 1;
10233 TREE_INVARIANT (decl) = 1;
10234 TREE_READONLY (decl) = 1;
10235 DECL_INITIAL (decl) = value;
10237 if (context && context == current_class_type)
10238 /* In something like `struct S { enum E { i = 7 }; };' we put `i'
10239 on the TYPE_FIELDS list for `S'. (That's so that you can say
10240 things like `S::i' later.) */
10241 finish_member_declaration (decl);
10245 /* Add this enumeration constant to the list for this type. */
10246 TYPE_VALUES (enumtype) = tree_cons (name, decl, TYPE_VALUES (enumtype));
10250 /* We're defining DECL. Make sure that it's type is OK. */
10253 check_function_type (tree decl, tree current_function_parms)
10255 tree fntype = TREE_TYPE (decl);
10256 tree return_type = complete_type (TREE_TYPE (fntype));
10258 /* In a function definition, arg types must be complete. */
10259 require_complete_types_for_parms (current_function_parms);
10261 if (dependent_type_p (return_type))
10263 if (!COMPLETE_OR_VOID_TYPE_P (return_type))
10265 tree args = TYPE_ARG_TYPES (fntype);
10267 error ("return type %q#T is incomplete", return_type);
10269 /* Make it return void instead. */
10270 if (TREE_CODE (fntype) == METHOD_TYPE)
10271 fntype = build_method_type_directly (TREE_TYPE (TREE_VALUE (args)),
10273 TREE_CHAIN (args));
10275 fntype = build_function_type (void_type_node, args);
10277 = build_exception_variant (fntype,
10278 TYPE_RAISES_EXCEPTIONS (TREE_TYPE (decl)));
10281 abstract_virtuals_error (decl, TREE_TYPE (fntype));
10284 /* Create the FUNCTION_DECL for a function definition.
10285 DECLSPECS and DECLARATOR are the parts of the declaration;
10286 they describe the function's name and the type it returns,
10287 but twisted together in a fashion that parallels the syntax of C.
10289 FLAGS is a bitwise or of SF_PRE_PARSED (indicating that the
10290 DECLARATOR is really the DECL for the function we are about to
10291 process and that DECLSPECS should be ignored), SF_INCLASS_INLINE
10292 indicating that the function is an inline defined in-class.
10294 This function creates a binding context for the function body
10295 as well as setting up the FUNCTION_DECL in current_function_decl.
10297 For C++, we must first check whether that datum makes any sense.
10298 For example, "class A local_a(1,2);" means that variable local_a
10299 is an aggregate of type A, which should have a constructor
10300 applied to it with the argument list [1, 2]. */
10303 start_preparsed_function (tree decl1, tree attrs, int flags)
10305 tree ctype = NULL_TREE;
10308 int doing_friend = 0;
10309 struct cp_binding_level *bl;
10310 tree current_function_parms;
10311 struct c_fileinfo *finfo
10312 = get_fileinfo (lbasename (LOCATION_FILE (DECL_SOURCE_LOCATION (decl1))));
10313 bool honor_interface;
10315 /* Sanity check. */
10316 gcc_assert (TREE_CODE (TREE_VALUE (void_list_node)) == VOID_TYPE);
10317 gcc_assert (TREE_CHAIN (void_list_node) == NULL_TREE);
10319 fntype = TREE_TYPE (decl1);
10320 if (TREE_CODE (fntype) == METHOD_TYPE)
10321 ctype = TYPE_METHOD_BASETYPE (fntype);
10323 /* ISO C++ 11.4/5. A friend function defined in a class is in
10324 the (lexical) scope of the class in which it is defined. */
10325 if (!ctype && DECL_FRIEND_P (decl1))
10327 ctype = DECL_FRIEND_CONTEXT (decl1);
10329 /* CTYPE could be null here if we're dealing with a template;
10330 for example, `inline friend float foo()' inside a template
10331 will have no CTYPE set. */
10332 if (ctype && TREE_CODE (ctype) != RECORD_TYPE)
10338 if (DECL_DECLARED_INLINE_P (decl1)
10339 && lookup_attribute ("noinline", attrs))
10340 warning (0, "inline function %q+D given attribute noinline", decl1);
10342 if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (decl1))
10343 /* This is a constructor, we must ensure that any default args
10344 introduced by this definition are propagated to the clones
10345 now. The clones are used directly in overload resolution. */
10346 adjust_clone_args (decl1);
10348 /* Sometimes we don't notice that a function is a static member, and
10349 build a METHOD_TYPE for it. Fix that up now. */
10350 if (ctype != NULL_TREE && DECL_STATIC_FUNCTION_P (decl1)
10351 && TREE_CODE (TREE_TYPE (decl1)) == METHOD_TYPE)
10353 revert_static_member_fn (decl1);
10357 /* Set up current_class_type, and enter the scope of the class, if
10360 push_nested_class (ctype);
10361 else if (DECL_STATIC_FUNCTION_P (decl1))
10362 push_nested_class (DECL_CONTEXT (decl1));
10364 /* Now that we have entered the scope of the class, we must restore
10365 the bindings for any template parameters surrounding DECL1, if it
10366 is an inline member template. (Order is important; consider the
10367 case where a template parameter has the same name as a field of
10368 the class.) It is not until after this point that
10369 PROCESSING_TEMPLATE_DECL is guaranteed to be set up correctly. */
10370 if (flags & SF_INCLASS_INLINE)
10371 maybe_begin_member_template_processing (decl1);
10373 /* Effective C++ rule 15. */
10375 && DECL_OVERLOADED_OPERATOR_P (decl1) == NOP_EXPR
10376 && TREE_CODE (TREE_TYPE (fntype)) == VOID_TYPE)
10377 warning (OPT_Weffc__, "%<operator=%> should return a reference to %<*this%>");
10379 /* Make the init_value nonzero so pushdecl knows this is not tentative.
10380 error_mark_node is replaced below (in poplevel) with the BLOCK. */
10381 if (!DECL_INITIAL (decl1))
10382 DECL_INITIAL (decl1) = error_mark_node;
10384 /* This function exists in static storage.
10385 (This does not mean `static' in the C sense!) */
10386 TREE_STATIC (decl1) = 1;
10388 /* We must call push_template_decl after current_class_type is set
10389 up. (If we are processing inline definitions after exiting a
10390 class scope, current_class_type will be NULL_TREE until set above
10391 by push_nested_class.) */
10392 if (processing_template_decl)
10394 /* FIXME: Handle error_mark_node more gracefully. */
10395 tree newdecl1 = push_template_decl (decl1);
10396 if (newdecl1 != error_mark_node)
10400 /* We are now in the scope of the function being defined. */
10401 current_function_decl = decl1;
10403 /* Save the parm names or decls from this function's declarator
10404 where store_parm_decls will find them. */
10405 current_function_parms = DECL_ARGUMENTS (decl1);
10407 /* Make sure the parameter and return types are reasonable. When
10408 you declare a function, these types can be incomplete, but they
10409 must be complete when you define the function. */
10410 check_function_type (decl1, current_function_parms);
10411 /* Make sure no default arg is missing. */
10412 check_default_args (decl1);
10414 /* Build the return declaration for the function. */
10415 restype = TREE_TYPE (fntype);
10416 /* Promote the value to int before returning it. */
10417 if (c_promoting_integer_type_p (restype))
10418 restype = type_promotes_to (restype);
10419 if (DECL_RESULT (decl1) == NULL_TREE)
10423 resdecl = build_decl (RESULT_DECL, 0, TYPE_MAIN_VARIANT (restype));
10424 DECL_ARTIFICIAL (resdecl) = 1;
10425 DECL_IGNORED_P (resdecl) = 1;
10426 DECL_RESULT (decl1) = resdecl;
10428 cp_apply_type_quals_to_decl (cp_type_quals (restype), resdecl);
10431 /* Initialize RTL machinery. We cannot do this until
10432 CURRENT_FUNCTION_DECL and DECL_RESULT are set up. We do this
10433 even when processing a template; this is how we get
10434 CFUN set up, and our per-function variables initialized.
10435 FIXME factor out the non-RTL stuff. */
10436 bl = current_binding_level;
10437 allocate_struct_function (decl1);
10438 current_binding_level = bl;
10440 /* Even though we're inside a function body, we still don't want to
10441 call expand_expr to calculate the size of a variable-sized array.
10442 We haven't necessarily assigned RTL to all variables yet, so it's
10443 not safe to try to expand expressions involving them. */
10444 cfun->x_dont_save_pending_sizes_p = 1;
10446 /* Start the statement-tree, start the tree now. */
10447 DECL_SAVED_TREE (decl1) = push_stmt_list ();
10449 /* Let the user know we're compiling this function. */
10450 announce_function (decl1);
10452 /* Record the decl so that the function name is defined.
10453 If we already have a decl for this name, and it is a FUNCTION_DECL,
10454 use the old decl. */
10455 if (!processing_template_decl && !(flags & SF_PRE_PARSED))
10457 /* A specialization is not used to guide overload resolution. */
10458 if (!DECL_FUNCTION_MEMBER_P (decl1)
10459 && !(DECL_USE_TEMPLATE (decl1) &&
10460 PRIMARY_TEMPLATE_P (DECL_TI_TEMPLATE (decl1))))
10462 tree olddecl = pushdecl (decl1);
10464 if (olddecl == error_mark_node)
10465 /* If something went wrong when registering the declaration,
10466 use DECL1; we have to have a FUNCTION_DECL to use when
10467 parsing the body of the function. */
10470 /* Otherwise, OLDDECL is either a previous declaration of
10471 the same function or DECL1 itself. */
10476 /* We need to set the DECL_CONTEXT. */
10477 if (!DECL_CONTEXT (decl1) && DECL_TEMPLATE_INFO (decl1))
10478 DECL_CONTEXT (decl1) = DECL_CONTEXT (DECL_TI_TEMPLATE (decl1));
10480 fntype = TREE_TYPE (decl1);
10482 /* If #pragma weak applies, mark the decl appropriately now.
10483 The pragma only applies to global functions. Because
10484 determining whether or not the #pragma applies involves
10485 computing the mangled name for the declaration, we cannot
10486 apply the pragma until after we have merged this declaration
10487 with any previous declarations; if the original declaration
10488 has a linkage specification, that specification applies to
10489 the definition as well, and may affect the mangled name. */
10490 if (!DECL_CONTEXT (decl1))
10491 maybe_apply_pragma_weak (decl1);
10494 /* Reset these in case the call to pushdecl changed them. */
10495 current_function_decl = decl1;
10496 cfun->decl = decl1;
10498 /* If we are (erroneously) defining a function that we have already
10499 defined before, wipe out what we knew before. */
10500 if (!DECL_PENDING_INLINE_P (decl1))
10501 DECL_SAVED_FUNCTION_DATA (decl1) = NULL;
10503 if (ctype && !doing_friend && !DECL_STATIC_FUNCTION_P (decl1))
10505 /* We know that this was set up by `grokclassfn'. We do not
10506 wait until `store_parm_decls', since evil parse errors may
10507 never get us to that point. Here we keep the consistency
10508 between `current_class_type' and `current_class_ptr'. */
10509 tree t = DECL_ARGUMENTS (decl1);
10511 gcc_assert (t != NULL_TREE && TREE_CODE (t) == PARM_DECL);
10512 gcc_assert (TREE_CODE (TREE_TYPE (t)) == POINTER_TYPE);
10514 cp_function_chain->x_current_class_ref
10515 = build_indirect_ref (t, NULL);
10516 cp_function_chain->x_current_class_ptr = t;
10518 /* Constructors and destructors need to know whether they're "in
10519 charge" of initializing virtual base classes. */
10520 t = TREE_CHAIN (t);
10521 if (DECL_HAS_IN_CHARGE_PARM_P (decl1))
10523 current_in_charge_parm = t;
10524 t = TREE_CHAIN (t);
10526 if (DECL_HAS_VTT_PARM_P (decl1))
10528 gcc_assert (DECL_NAME (t) == vtt_parm_identifier);
10529 current_vtt_parm = t;
10533 honor_interface = (!DECL_TEMPLATE_INSTANTIATION (decl1)
10534 /* Implicitly-defined methods (like the
10535 destructor for a class in which no destructor
10536 is explicitly declared) must not be defined
10537 until their definition is needed. So, we
10538 ignore interface specifications for
10539 compiler-generated functions. */
10540 && !DECL_ARTIFICIAL (decl1));
10542 if (DECL_INTERFACE_KNOWN (decl1))
10544 tree ctx = decl_function_context (decl1);
10546 if (DECL_NOT_REALLY_EXTERN (decl1))
10547 DECL_EXTERNAL (decl1) = 0;
10549 if (ctx != NULL_TREE && DECL_DECLARED_INLINE_P (ctx)
10550 && TREE_PUBLIC (ctx))
10551 /* This is a function in a local class in an extern inline
10553 comdat_linkage (decl1);
10555 /* If this function belongs to an interface, it is public.
10556 If it belongs to someone else's interface, it is also external.
10557 This only affects inlines and template instantiations. */
10558 else if (!finfo->interface_unknown && honor_interface)
10560 if (DECL_DECLARED_INLINE_P (decl1)
10561 || DECL_TEMPLATE_INSTANTIATION (decl1)
10562 || processing_template_decl)
10564 DECL_EXTERNAL (decl1)
10565 = (finfo->interface_only
10566 || (DECL_DECLARED_INLINE_P (decl1)
10567 && ! flag_implement_inlines
10568 && !DECL_VINDEX (decl1)));
10570 /* For WIN32 we also want to put these in linkonce sections. */
10571 maybe_make_one_only (decl1);
10574 DECL_EXTERNAL (decl1) = 0;
10575 DECL_INTERFACE_KNOWN (decl1) = 1;
10576 /* If this function is in an interface implemented in this file,
10577 make sure that the backend knows to emit this function
10579 if (!DECL_EXTERNAL (decl1))
10580 mark_needed (decl1);
10582 else if (finfo->interface_unknown && finfo->interface_only
10583 && honor_interface)
10585 /* If MULTIPLE_SYMBOL_SPACES is defined and we saw a #pragma
10586 interface, we will have both finfo->interface_unknown and
10587 finfo->interface_only set. In that case, we don't want to
10588 use the normal heuristics because someone will supply a
10589 #pragma implementation elsewhere, and deducing it here would
10590 produce a conflict. */
10591 comdat_linkage (decl1);
10592 DECL_EXTERNAL (decl1) = 0;
10593 DECL_INTERFACE_KNOWN (decl1) = 1;
10594 DECL_DEFER_OUTPUT (decl1) = 1;
10598 /* This is a definition, not a reference.
10599 So clear DECL_EXTERNAL. */
10600 DECL_EXTERNAL (decl1) = 0;
10602 if ((DECL_DECLARED_INLINE_P (decl1)
10603 || DECL_TEMPLATE_INSTANTIATION (decl1))
10604 && ! DECL_INTERFACE_KNOWN (decl1)
10605 /* Don't try to defer nested functions for now. */
10606 && ! decl_function_context (decl1))
10607 DECL_DEFER_OUTPUT (decl1) = 1;
10609 DECL_INTERFACE_KNOWN (decl1) = 1;
10612 /* Determine the ELF visibility attribute for the function. We must not
10613 do this before calling "pushdecl", as we must allow "duplicate_decls"
10614 to merge any attributes appropriately. We also need to wait until
10616 if (!DECL_CLONED_FUNCTION_P (decl1))
10617 determine_visibility (decl1);
10619 begin_scope (sk_function_parms, decl1);
10623 if (DECL_DESTRUCTOR_P (decl1)
10624 || (DECL_CONSTRUCTOR_P (decl1)
10625 && targetm.cxx.cdtor_returns_this ()))
10627 cdtor_label = build_decl (LABEL_DECL, NULL_TREE, NULL_TREE);
10628 DECL_CONTEXT (cdtor_label) = current_function_decl;
10631 start_fname_decls ();
10633 store_parm_decls (current_function_parms);
10637 /* Like start_preparsed_function, except that instead of a
10638 FUNCTION_DECL, this function takes DECLSPECS and DECLARATOR.
10640 Returns 1 on success. If the DECLARATOR is not suitable for a function
10641 (it defines a datum instead), we return 0, which tells
10642 yyparse to report a parse error. */
10645 start_function (cp_decl_specifier_seq *declspecs,
10646 const cp_declarator *declarator,
10651 decl1 = grokdeclarator (declarator, declspecs, FUNCDEF, 1, &attrs);
10652 /* If the declarator is not suitable for a function definition,
10653 cause a syntax error. */
10654 if (decl1 == NULL_TREE || TREE_CODE (decl1) != FUNCTION_DECL)
10657 if (DECL_MAIN_P (decl1))
10658 /* main must return int. grokfndecl should have corrected it
10659 (and issued a diagnostic) if the user got it wrong. */
10660 gcc_assert (same_type_p (TREE_TYPE (TREE_TYPE (decl1)),
10661 integer_type_node));
10663 start_preparsed_function (decl1, attrs, /*flags=*/SF_DEFAULT);
10668 /* Returns true iff an EH_SPEC_BLOCK should be created in the body of
10672 use_eh_spec_block (tree fn)
10674 return (flag_exceptions && flag_enforce_eh_specs
10675 && !processing_template_decl
10676 && TYPE_RAISES_EXCEPTIONS (TREE_TYPE (fn))
10677 /* We insert the EH_SPEC_BLOCK only in the original
10678 function; then, it is copied automatically to the
10680 && !DECL_CLONED_FUNCTION_P (fn)
10681 /* Implicitly-generated constructors and destructors have
10682 exception specifications. However, those specifications
10683 are the union of the possible exceptions specified by the
10684 constructors/destructors for bases and members, so no
10685 unallowed exception will ever reach this function. By
10686 not creating the EH_SPEC_BLOCK we save a little memory,
10687 and we avoid spurious warnings about unreachable
10689 && !DECL_ARTIFICIAL (fn));
10692 /* Store the parameter declarations into the current function declaration.
10693 This is called after parsing the parameter declarations, before
10694 digesting the body of the function.
10696 Also install to binding contour return value identifier, if any. */
10699 store_parm_decls (tree current_function_parms)
10701 tree fndecl = current_function_decl;
10704 /* This is a chain of any other decls that came in among the parm
10705 declarations. If a parm is declared with enum {foo, bar} x;
10706 then CONST_DECLs for foo and bar are put here. */
10707 tree nonparms = NULL_TREE;
10709 if (current_function_parms)
10711 /* This case is when the function was defined with an ANSI prototype.
10712 The parms already have decls, so we need not do anything here
10713 except record them as in effect
10714 and complain if any redundant old-style parm decls were written. */
10716 tree specparms = current_function_parms;
10719 /* Must clear this because it might contain TYPE_DECLs declared
10721 current_binding_level->names = NULL;
10723 /* If we're doing semantic analysis, then we'll call pushdecl
10724 for each of these. We must do them in reverse order so that
10725 they end in the correct forward order. */
10726 specparms = nreverse (specparms);
10728 for (parm = specparms; parm; parm = next)
10730 next = TREE_CHAIN (parm);
10731 if (TREE_CODE (parm) == PARM_DECL)
10733 if (DECL_NAME (parm) == NULL_TREE
10734 || TREE_CODE (parm) != VOID_TYPE)
10737 error ("parameter %qD declared void", parm);
10741 /* If we find an enum constant or a type tag,
10742 put it aside for the moment. */
10743 TREE_CHAIN (parm) = NULL_TREE;
10744 nonparms = chainon (nonparms, parm);
10748 /* Get the decls in their original chain order and record in the
10749 function. This is all and only the PARM_DECLs that were
10750 pushed into scope by the loop above. */
10751 DECL_ARGUMENTS (fndecl) = getdecls ();
10754 DECL_ARGUMENTS (fndecl) = NULL_TREE;
10756 /* Now store the final chain of decls for the arguments
10757 as the decl-chain of the current lexical scope.
10758 Put the enumerators in as well, at the front so that
10759 DECL_ARGUMENTS is not modified. */
10760 current_binding_level->names = chainon (nonparms, DECL_ARGUMENTS (fndecl));
10762 if (use_eh_spec_block (current_function_decl))
10763 current_eh_spec_block = begin_eh_spec_block ();
10767 /* We have finished doing semantic analysis on DECL, but have not yet
10768 generated RTL for its body. Save away our current state, so that
10769 when we want to generate RTL later we know what to do. */
10772 save_function_data (tree decl)
10774 struct language_function *f;
10776 /* Save the language-specific per-function data so that we can
10777 get it back when we really expand this function. */
10778 gcc_assert (!DECL_PENDING_INLINE_P (decl));
10781 f = GGC_NEW (struct language_function);
10782 memcpy (f, cp_function_chain, sizeof (struct language_function));
10783 DECL_SAVED_FUNCTION_DATA (decl) = f;
10785 /* Clear out the bits we don't need. */
10786 f->base.x_stmt_tree.x_cur_stmt_list = NULL_TREE;
10787 f->bindings = NULL;
10788 f->x_local_names = NULL;
10792 /* Set the return value of the constructor (if present). */
10795 finish_constructor_body (void)
10800 if (targetm.cxx.cdtor_returns_this ())
10802 /* Any return from a constructor will end up here. */
10803 add_stmt (build_stmt (LABEL_EXPR, cdtor_label));
10805 val = DECL_ARGUMENTS (current_function_decl);
10806 val = build2 (MODIFY_EXPR, TREE_TYPE (val),
10807 DECL_RESULT (current_function_decl), val);
10808 /* Return the address of the object. */
10809 exprstmt = build_stmt (RETURN_EXPR, val);
10810 add_stmt (exprstmt);
10814 /* Do all the processing for the beginning of a destructor; set up the
10815 vtable pointers and cleanups for bases and members. */
10818 begin_destructor_body (void)
10820 tree compound_stmt;
10822 /* If the CURRENT_CLASS_TYPE is incomplete, we will have already
10823 issued an error message. We still want to try to process the
10824 body of the function, but initialize_vtbl_ptrs will crash if
10825 TYPE_BINFO is NULL. */
10826 if (COMPLETE_TYPE_P (current_class_type))
10828 compound_stmt = begin_compound_stmt (0);
10829 /* Make all virtual function table pointers in non-virtual base
10830 classes point to CURRENT_CLASS_TYPE's virtual function
10832 initialize_vtbl_ptrs (current_class_ptr);
10833 finish_compound_stmt (compound_stmt);
10835 /* And insert cleanups for our bases and members so that they
10836 will be properly destroyed if we throw. */
10837 push_base_cleanups ();
10841 /* At the end of every destructor we generate code to delete the object if
10842 necessary. Do that now. */
10845 finish_destructor_body (void)
10849 /* Any return from a destructor will end up here; that way all base
10850 and member cleanups will be run when the function returns. */
10851 add_stmt (build_stmt (LABEL_EXPR, cdtor_label));
10853 /* In a virtual destructor, we must call delete. */
10854 if (DECL_VIRTUAL_P (current_function_decl))
10857 tree virtual_size = cxx_sizeof (current_class_type);
10861 At the point of definition of a virtual destructor (including
10862 an implicit definition), non-placement operator delete shall
10863 be looked up in the scope of the destructor's class and if
10864 found shall be accessible and unambiguous. */
10865 exprstmt = build_op_delete_call(DELETE_EXPR, current_class_ptr,
10867 /*global_p=*/false,
10868 /*placement=*/NULL_TREE,
10869 /*alloc_fn=*/NULL_TREE);
10871 if_stmt = begin_if_stmt ();
10872 finish_if_stmt_cond (build2 (BIT_AND_EXPR, integer_type_node,
10873 current_in_charge_parm,
10876 finish_expr_stmt (exprstmt);
10877 finish_then_clause (if_stmt);
10878 finish_if_stmt (if_stmt);
10881 if (targetm.cxx.cdtor_returns_this ())
10885 val = DECL_ARGUMENTS (current_function_decl);
10886 val = build2 (MODIFY_EXPR, TREE_TYPE (val),
10887 DECL_RESULT (current_function_decl), val);
10888 /* Return the address of the object. */
10889 exprstmt = build_stmt (RETURN_EXPR, val);
10890 add_stmt (exprstmt);
10894 /* Do the necessary processing for the beginning of a function body, which
10895 in this case includes member-initializers, but not the catch clauses of
10896 a function-try-block. Currently, this means opening a binding level
10897 for the member-initializers (in a ctor) and member cleanups (in a dtor). */
10900 begin_function_body (void)
10904 if (! FUNCTION_NEEDS_BODY_BLOCK (current_function_decl))
10907 if (processing_template_decl)
10908 /* Do nothing now. */;
10910 /* Always keep the BLOCK node associated with the outermost pair of
10911 curly braces of a function. These are needed for correct
10912 operation of dwarfout.c. */
10913 keep_next_level (true);
10915 stmt = begin_compound_stmt (BCS_FN_BODY);
10917 if (processing_template_decl)
10918 /* Do nothing now. */;
10919 else if (DECL_DESTRUCTOR_P (current_function_decl))
10920 begin_destructor_body ();
10925 /* Do the processing for the end of a function body. Currently, this means
10926 closing out the cleanups for fully-constructed bases and members, and in
10927 the case of the destructor, deleting the object if desired. Again, this
10928 is only meaningful for [cd]tors, since they are the only functions where
10929 there is a significant distinction between the main body and any
10930 function catch clauses. Handling, say, main() return semantics here
10931 would be wrong, as flowing off the end of a function catch clause for
10932 main() would also need to return 0. */
10935 finish_function_body (tree compstmt)
10937 if (compstmt == NULL_TREE)
10940 /* Close the block. */
10941 finish_compound_stmt (compstmt);
10943 if (processing_template_decl)
10944 /* Do nothing now. */;
10945 else if (DECL_CONSTRUCTOR_P (current_function_decl))
10946 finish_constructor_body ();
10947 else if (DECL_DESTRUCTOR_P (current_function_decl))
10948 finish_destructor_body ();
10951 /* Given a function, returns the BLOCK corresponding to the outermost level
10952 of curly braces, skipping the artificial block created for constructor
10956 outer_curly_brace_block (tree fndecl)
10958 tree block = BLOCK_SUBBLOCKS (DECL_INITIAL (fndecl));
10959 if (FUNCTION_NEEDS_BODY_BLOCK (current_function_decl))
10960 /* Skip the artificial function body block. */
10961 block = BLOCK_SUBBLOCKS (block);
10965 /* Finish up a function declaration and compile that function
10966 all the way to assembler language output. The free the storage
10967 for the function definition.
10969 FLAGS is a bitwise or of the following values:
10971 We just finished processing the body of an in-class inline
10972 function definition. (This processing will have taken place
10973 after the class definition is complete.) */
10976 finish_function (int flags)
10978 tree fndecl = current_function_decl;
10979 tree fntype, ctype = NULL_TREE;
10980 int inclass_inline = (flags & 2) != 0;
10983 /* When we get some parse errors, we can end up without a
10984 current_function_decl, so cope. */
10985 if (fndecl == NULL_TREE)
10986 return error_mark_node;
10988 if (DECL_NONSTATIC_MEMBER_FUNCTION_P (fndecl)
10989 && DECL_VIRTUAL_P (fndecl)
10990 && !processing_template_decl)
10992 tree fnclass = DECL_CONTEXT (fndecl);
10993 if (fndecl == CLASSTYPE_KEY_METHOD (fnclass))
10994 keyed_classes = tree_cons (NULL_TREE, fnclass, keyed_classes);
10997 nested = function_depth > 1;
10998 fntype = TREE_TYPE (fndecl);
11000 /* TREE_READONLY (fndecl) = 1;
11001 This caused &foo to be of type ptr-to-const-function
11002 which then got a warning when stored in a ptr-to-function variable. */
11004 gcc_assert (building_stmt_tree ());
11006 /* For a cloned function, we've already got all the code we need;
11007 there's no need to add any extra bits. */
11008 if (!DECL_CLONED_FUNCTION_P (fndecl))
11010 if (DECL_MAIN_P (current_function_decl))
11014 /* Make it so that `main' always returns 0 by default (or
11017 stmt = finish_return_stmt (integer_one_node);
11019 stmt = finish_return_stmt (integer_zero_node);
11021 /* Hack. We don't want the middle-end to warn that this
11022 return is unreachable, so put the statement on the
11024 #ifdef USE_MAPPED_LOCATION
11025 SET_EXPR_LOCATION (stmt, UNKNOWN_LOCATION);
11027 annotate_with_file_line (stmt, input_filename, 0);
11031 if (use_eh_spec_block (current_function_decl))
11032 finish_eh_spec_block (TYPE_RAISES_EXCEPTIONS
11033 (TREE_TYPE (current_function_decl)),
11034 current_eh_spec_block);
11037 /* If we're saving up tree structure, tie off the function now. */
11038 DECL_SAVED_TREE (fndecl) = pop_stmt_list (DECL_SAVED_TREE (fndecl));
11040 finish_fname_decls ();
11042 /* If this function can't throw any exceptions, remember that. */
11043 if (!processing_template_decl
11044 && !cp_function_chain->can_throw
11045 && !flag_non_call_exceptions)
11046 TREE_NOTHROW (fndecl) = 1;
11048 /* This must come after expand_function_end because cleanups might
11049 have declarations (from inline functions) that need to go into
11050 this function's blocks. */
11052 /* If the current binding level isn't the outermost binding level
11053 for this function, either there is a bug, or we have experienced
11054 syntax errors and the statement tree is malformed. */
11055 if (current_binding_level->kind != sk_function_parms)
11057 /* Make sure we have already experienced errors. */
11058 gcc_assert (errorcount);
11060 /* Throw away the broken statement tree and extra binding
11062 DECL_SAVED_TREE (fndecl) = alloc_stmt_list ();
11064 while (current_binding_level->kind != sk_function_parms)
11066 if (current_binding_level->kind == sk_class)
11067 pop_nested_class ();
11069 poplevel (0, 0, 0);
11072 poplevel (1, 0, 1);
11074 /* Statements should always be full-expressions at the outermost set
11075 of curly braces for a function. */
11076 gcc_assert (stmts_are_full_exprs_p ());
11078 /* Set up the named return value optimization, if we can. Candidate
11079 variables are selected in check_return_value. */
11080 if (current_function_return_value)
11082 tree r = current_function_return_value;
11085 if (r != error_mark_node
11086 /* This is only worth doing for fns that return in memory--and
11087 simpler, since we don't have to worry about promoted modes. */
11088 && aggregate_value_p (TREE_TYPE (TREE_TYPE (fndecl)), fndecl)
11089 /* Only allow this for variables declared in the outer scope of
11090 the function so we know that their lifetime always ends with a
11091 return; see g++.dg/opt/nrv6.C. We could be more flexible if
11092 we were to do this optimization in tree-ssa. */
11093 && (outer = outer_curly_brace_block (fndecl))
11094 && chain_member (r, BLOCK_VARS (outer)))
11095 finalize_nrv (&DECL_SAVED_TREE (fndecl), r, DECL_RESULT (fndecl));
11097 current_function_return_value = NULL_TREE;
11100 /* Remember that we were in class scope. */
11101 if (current_class_name)
11102 ctype = current_class_type;
11104 /* Must mark the RESULT_DECL as being in this function. */
11105 DECL_CONTEXT (DECL_RESULT (fndecl)) = fndecl;
11107 /* Set the BLOCK_SUPERCONTEXT of the outermost function scope to point
11108 to the FUNCTION_DECL node itself. */
11109 BLOCK_SUPERCONTEXT (DECL_INITIAL (fndecl)) = fndecl;
11111 /* Save away current state, if appropriate. */
11112 if (!processing_template_decl)
11113 save_function_data (fndecl);
11115 /* Complain if there's just no return statement. */
11116 if (warn_return_type
11117 && TREE_CODE (TREE_TYPE (fntype)) != VOID_TYPE
11118 && !dependent_type_p (TREE_TYPE (fntype))
11119 && !current_function_returns_value && !current_function_returns_null
11120 /* Don't complain if we abort or throw. */
11121 && !current_function_returns_abnormally
11122 && !DECL_NAME (DECL_RESULT (fndecl))
11123 /* Normally, with -Wreturn-type, flow will complain. Unless we're an
11124 inline function, as we might never be compiled separately. */
11125 && (DECL_INLINE (fndecl) || processing_template_decl)
11126 /* Structor return values (if any) are set by the compiler. */
11127 && !DECL_CONSTRUCTOR_P (fndecl)
11128 && !DECL_DESTRUCTOR_P (fndecl))
11129 warning (OPT_Wreturn_type, "no return statement in function returning non-void");
11131 /* Store the end of the function, so that we get good line number
11132 info for the epilogue. */
11133 cfun->function_end_locus = input_location;
11135 /* Genericize before inlining. */
11136 if (!processing_template_decl)
11138 struct language_function *f = DECL_SAVED_FUNCTION_DATA (fndecl);
11139 cp_genericize (fndecl);
11140 /* Clear out the bits we don't need. */
11141 f->x_current_class_ptr = NULL;
11142 f->x_current_class_ref = NULL;
11143 f->x_eh_spec_block = NULL;
11144 f->x_in_charge_parm = NULL;
11145 f->x_vtt_parm = NULL;
11146 f->x_return_value = NULL;
11147 f->bindings = NULL;
11148 f->extern_decl_map = NULL;
11150 /* Handle attribute((warn_unused_result)). Relies on gimple input. */
11151 c_warn_unused_result (&DECL_SAVED_TREE (fndecl));
11153 /* Clear out the bits we don't need. */
11154 local_names = NULL;
11156 /* We're leaving the context of this function, so zap cfun. It's still in
11157 DECL_STRUCT_FUNCTION, and we'll restore it in tree_rest_of_compilation. */
11159 current_function_decl = NULL;
11161 /* If this is an in-class inline definition, we may have to pop the
11162 bindings for the template parameters that we added in
11163 maybe_begin_member_template_processing when start_function was
11165 if (inclass_inline)
11166 maybe_end_member_template_processing ();
11168 /* Leave the scope of the class. */
11170 pop_nested_class ();
11176 /* Let the error reporting routines know that we're outside a
11177 function. For a nested function, this value is used in
11178 cxx_pop_function_context and then reset via pop_function_context. */
11179 current_function_decl = NULL_TREE;
11184 /* Create the FUNCTION_DECL for a function definition.
11185 DECLSPECS and DECLARATOR are the parts of the declaration;
11186 they describe the return type and the name of the function,
11187 but twisted together in a fashion that parallels the syntax of C.
11189 This function creates a binding context for the function body
11190 as well as setting up the FUNCTION_DECL in current_function_decl.
11192 Returns a FUNCTION_DECL on success.
11194 If the DECLARATOR is not suitable for a function (it defines a datum
11195 instead), we return 0, which tells yyparse to report a parse error.
11197 May return void_type_node indicating that this method is actually
11198 a friend. See grokfield for more details.
11200 Came here with a `.pushlevel' .
11202 DO NOT MAKE ANY CHANGES TO THIS CODE WITHOUT MAKING CORRESPONDING
11203 CHANGES TO CODE IN `grokfield'. */
11206 start_method (cp_decl_specifier_seq *declspecs,
11207 const cp_declarator *declarator, tree attrlist)
11209 tree fndecl = grokdeclarator (declarator, declspecs, MEMFUNCDEF, 0,
11212 if (fndecl == error_mark_node)
11213 return error_mark_node;
11215 if (fndecl == NULL || TREE_CODE (fndecl) != FUNCTION_DECL)
11217 error ("invalid member function declaration");
11218 return error_mark_node;
11222 cplus_decl_attributes (&fndecl, attrlist, 0);
11224 /* Pass friends other than inline friend functions back. */
11225 if (fndecl == void_type_node)
11228 if (DECL_IN_AGGR_P (fndecl))
11230 if (DECL_CONTEXT (fndecl)
11231 && TREE_CODE (DECL_CONTEXT (fndecl)) != NAMESPACE_DECL)
11232 error ("%qD is already defined in class %qT", fndecl,
11233 DECL_CONTEXT (fndecl));
11234 return error_mark_node;
11237 check_template_shadow (fndecl);
11239 DECL_DECLARED_INLINE_P (fndecl) = 1;
11240 if (flag_default_inline)
11241 DECL_INLINE (fndecl) = 1;
11243 /* We process method specializations in finish_struct_1. */
11244 if (processing_template_decl && !DECL_TEMPLATE_SPECIALIZATION (fndecl))
11246 fndecl = push_template_decl (fndecl);
11247 if (fndecl == error_mark_node)
11251 if (! DECL_FRIEND_P (fndecl))
11253 if (TREE_CHAIN (fndecl))
11255 fndecl = copy_node (fndecl);
11256 TREE_CHAIN (fndecl) = NULL_TREE;
11260 finish_decl (fndecl, NULL_TREE, NULL_TREE);
11262 /* Make a place for the parms. */
11263 begin_scope (sk_function_parms, fndecl);
11265 DECL_IN_AGGR_P (fndecl) = 1;
11269 /* Go through the motions of finishing a function definition.
11270 We don't compile this method until after the whole class has
11273 FINISH_METHOD must return something that looks as though it
11274 came from GROKFIELD (since we are defining a method, after all).
11276 This is called after parsing the body of the function definition.
11277 STMTS is the chain of statements that makes up the function body.
11279 DECL is the ..._DECL that `start_method' provided. */
11282 finish_method (tree decl)
11284 tree fndecl = decl;
11289 if (decl == void_type_node)
11292 old_initial = DECL_INITIAL (fndecl);
11294 /* Undo the level for the parms (from start_method).
11295 This is like poplevel, but it causes nothing to be
11296 saved. Saving information here confuses symbol-table
11297 output routines. Besides, this information will
11298 be correctly output when this method is actually
11301 /* Clear out the meanings of the local variables of this level;
11302 also record in each decl which block it belongs to. */
11304 for (link = current_binding_level->names; link; link = TREE_CHAIN (link))
11306 if (DECL_NAME (link) != NULL_TREE)
11307 pop_binding (DECL_NAME (link), link);
11308 gcc_assert (TREE_CODE (link) != FUNCTION_DECL);
11309 DECL_CONTEXT (link) = NULL_TREE;
11312 poplevel (0, 0, 0);
11314 DECL_INITIAL (fndecl) = old_initial;
11316 /* We used to check if the context of FNDECL was different from
11317 current_class_type as another way to get inside here. This didn't work
11318 for String.cc in libg++. */
11319 if (DECL_FRIEND_P (fndecl))
11321 VEC_safe_push (tree, gc, CLASSTYPE_INLINE_FRIENDS (current_class_type),
11323 decl = void_type_node;
11330 /* VAR is a VAR_DECL. If its type is incomplete, remember VAR so that
11331 we can lay it out later, when and if its type becomes complete. */
11334 maybe_register_incomplete_var (tree var)
11336 gcc_assert (TREE_CODE (var) == VAR_DECL);
11338 /* Keep track of variables with incomplete types. */
11339 if (!processing_template_decl && TREE_TYPE (var) != error_mark_node
11340 && DECL_EXTERNAL (var))
11342 tree inner_type = TREE_TYPE (var);
11344 while (TREE_CODE (inner_type) == ARRAY_TYPE)
11345 inner_type = TREE_TYPE (inner_type);
11346 inner_type = TYPE_MAIN_VARIANT (inner_type);
11348 if ((!COMPLETE_TYPE_P (inner_type) && CLASS_TYPE_P (inner_type))
11349 /* RTTI TD entries are created while defining the type_info. */
11350 || (TYPE_LANG_SPECIFIC (inner_type)
11351 && TYPE_BEING_DEFINED (inner_type)))
11352 incomplete_vars = tree_cons (inner_type, var, incomplete_vars);
11356 /* Called when a class type (given by TYPE) is defined. If there are
11357 any existing VAR_DECLs whose type hsa been completed by this
11358 declaration, update them now. */
11361 complete_vars (tree type)
11363 tree *list = &incomplete_vars;
11365 gcc_assert (CLASS_TYPE_P (type));
11368 if (same_type_p (type, TREE_PURPOSE (*list)))
11370 tree var = TREE_VALUE (*list);
11371 tree type = TREE_TYPE (var);
11372 /* Complete the type of the variable. The VAR_DECL itself
11373 will be laid out in expand_expr. */
11374 complete_type (type);
11375 cp_apply_type_quals_to_decl (cp_type_quals (type), var);
11376 /* Remove this entry from the list. */
11377 *list = TREE_CHAIN (*list);
11380 list = &TREE_CHAIN (*list);
11383 /* Check for pending declarations which may have abstract type. */
11384 complete_type_check_abstract (type);
11387 /* If DECL is of a type which needs a cleanup, build that cleanup
11391 cxx_maybe_build_cleanup (tree decl)
11393 tree type = TREE_TYPE (decl);
11395 if (type != error_mark_node && TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type))
11397 int flags = LOOKUP_NORMAL|LOOKUP_DESTRUCTOR;
11399 bool has_vbases = (TREE_CODE (type) == RECORD_TYPE
11400 && CLASSTYPE_VBASECLASSES (type));
11402 if (TREE_CODE (type) == ARRAY_TYPE)
11406 cxx_mark_addressable (decl);
11407 rval = build_unary_op (ADDR_EXPR, decl, 0);
11410 /* Optimize for space over speed here. */
11411 if (!has_vbases || flag_expensive_optimizations)
11412 flags |= LOOKUP_NONVIRTUAL;
11414 rval = build_delete (TREE_TYPE (rval), rval,
11415 sfk_complete_destructor, flags, 0);
11422 /* When a stmt has been parsed, this function is called. */
11429 /* DECL was originally constructed as a non-static member function,
11430 but turned out to be static. Update it accordingly. */
11433 revert_static_member_fn (tree decl)
11436 tree function = TREE_TYPE (decl);
11437 tree args = TYPE_ARG_TYPES (function);
11439 if (cp_type_quals (TREE_TYPE (TREE_VALUE (args)))
11440 != TYPE_UNQUALIFIED)
11441 error ("static member function %q#D declared with type qualifiers", decl);
11443 args = TREE_CHAIN (args);
11444 tmp = build_function_type (TREE_TYPE (function), args);
11445 tmp = build_qualified_type (tmp, cp_type_quals (function));
11446 tmp = build_exception_variant (tmp,
11447 TYPE_RAISES_EXCEPTIONS (function));
11448 TREE_TYPE (decl) = tmp;
11449 if (DECL_ARGUMENTS (decl))
11450 DECL_ARGUMENTS (decl) = TREE_CHAIN (DECL_ARGUMENTS (decl));
11451 DECL_STATIC_FUNCTION_P (decl) = 1;
11454 /* Initialize the variables used during compilation of a C++
11458 cxx_push_function_context (struct function * f)
11460 struct language_function *p = GGC_CNEW (struct language_function);
11463 /* Whenever we start a new function, we destroy temporaries in the
11465 current_stmt_tree ()->stmts_are_full_exprs_p = 1;
11471 if (DECL_SAVED_FUNCTION_DATA (fn))
11473 /* If we already parsed this function, and we're just expanding it
11474 now, restore saved state. */
11475 *cp_function_chain = *DECL_SAVED_FUNCTION_DATA (fn);
11477 /* We don't need the saved data anymore. Unless this is an inline
11478 function; we need the named return value info for
11479 declare_return_variable. */
11480 if (! DECL_INLINE (fn))
11481 DECL_SAVED_FUNCTION_DATA (fn) = NULL;
11486 /* Free the language-specific parts of F, now that we've finished
11487 compiling the function. */
11490 cxx_pop_function_context (struct function * f)
11495 /* Return which tree structure is used by T, or TS_CP_GENERIC if T is
11496 one of the language-independent trees. */
11498 enum cp_tree_node_structure_enum
11499 cp_tree_node_structure (union lang_tree_node * t)
11501 switch (TREE_CODE (&t->generic))
11503 case DEFAULT_ARG: return TS_CP_DEFAULT_ARG;
11504 case IDENTIFIER_NODE: return TS_CP_IDENTIFIER;
11505 case OVERLOAD: return TS_CP_OVERLOAD;
11506 case TEMPLATE_PARM_INDEX: return TS_CP_TPI;
11507 case TINST_LEVEL: return TS_CP_TINST_LEVEL;
11508 case PTRMEM_CST: return TS_CP_PTRMEM;
11509 case BASELINK: return TS_CP_BASELINK;
11510 default: return TS_CP_GENERIC;
11514 /* Build the void_list_node (void_type_node having been created). */
11516 build_void_list_node (void)
11518 tree t = build_tree_list (NULL_TREE, void_type_node);
11523 cp_missing_noreturn_ok_p (tree decl)
11525 /* A missing noreturn is ok for the `main' function. */
11526 return DECL_MAIN_P (decl);
11529 /* Return the COMDAT group into which DECL should be placed. */
11532 cxx_comdat_group (tree decl)
11536 /* Virtual tables, construction virtual tables, and virtual table
11537 tables all go in a single COMDAT group, named after the primary
11539 if (TREE_CODE (decl) == VAR_DECL && DECL_VTABLE_OR_VTT_P (decl))
11540 name = DECL_ASSEMBLER_NAME (CLASSTYPE_VTABLES (DECL_CONTEXT (decl)));
11541 /* For all other DECLs, the COMDAT group is the mangled name of the
11542 declaration itself. */
11545 while (DECL_THUNK_P (decl))
11547 /* If TARGET_USE_LOCAL_THUNK_ALIAS_P, use_thunk puts the thunk
11548 into the same section as the target function. In that case
11549 we must return target's name. */
11550 tree target = THUNK_TARGET (decl);
11551 if (TARGET_USE_LOCAL_THUNK_ALIAS_P (target)
11552 && DECL_SECTION_NAME (target) != NULL
11553 && DECL_ONE_ONLY (target))
11558 name = DECL_ASSEMBLER_NAME (decl);
11561 return IDENTIFIER_POINTER (name);
11564 #include "gt-cp-decl.h"