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);
1380 error ("conflicting declaration %q#D", newdecl);
1381 error ("%q+D has a previous declaration as %q#D", olddecl, olddecl);
1382 return error_mark_node;
1385 else if (TREE_CODE (newdecl) == FUNCTION_DECL
1386 && ((DECL_TEMPLATE_SPECIALIZATION (olddecl)
1387 && (!DECL_TEMPLATE_INFO (newdecl)
1388 || (DECL_TI_TEMPLATE (newdecl)
1389 != DECL_TI_TEMPLATE (olddecl))))
1390 || (DECL_TEMPLATE_SPECIALIZATION (newdecl)
1391 && (!DECL_TEMPLATE_INFO (olddecl)
1392 || (DECL_TI_TEMPLATE (olddecl)
1393 != DECL_TI_TEMPLATE (newdecl))))))
1394 /* It's OK to have a template specialization and a non-template
1395 with the same type, or to have specializations of two
1396 different templates with the same type. Note that if one is a
1397 specialization, and the other is an instantiation of the same
1398 template, that we do not exit at this point. That situation
1399 can occur if we instantiate a template class, and then
1400 specialize one of its methods. This situation is valid, but
1401 the declarations must be merged in the usual way. */
1403 else if (TREE_CODE (newdecl) == FUNCTION_DECL
1404 && ((DECL_TEMPLATE_INSTANTIATION (olddecl)
1405 && !DECL_USE_TEMPLATE (newdecl))
1406 || (DECL_TEMPLATE_INSTANTIATION (newdecl)
1407 && !DECL_USE_TEMPLATE (olddecl))))
1408 /* One of the declarations is a template instantiation, and the
1409 other is not a template at all. That's OK. */
1411 else if (TREE_CODE (newdecl) == NAMESPACE_DECL)
1413 /* In [namespace.alias] we have:
1415 In a declarative region, a namespace-alias-definition can be
1416 used to redefine a namespace-alias declared in that declarative
1417 region to refer only to the namespace to which it already
1420 Therefore, if we encounter a second alias directive for the same
1421 alias, we can just ignore the second directive. */
1422 if (DECL_NAMESPACE_ALIAS (newdecl)
1423 && (DECL_NAMESPACE_ALIAS (newdecl)
1424 == DECL_NAMESPACE_ALIAS (olddecl)))
1426 /* [namespace.alias]
1428 A namespace-name or namespace-alias shall not be declared as
1429 the name of any other entity in the same declarative region.
1430 A namespace-name defined at global scope shall not be
1431 declared as the name of any other entity in any global scope
1433 error ("declaration of namespace %qD conflicts with", newdecl);
1434 error ("previous declaration of namespace %q+D here", olddecl);
1435 return error_mark_node;
1439 const char *errmsg = redeclaration_error_message (newdecl, olddecl);
1442 error (errmsg, newdecl);
1443 if (DECL_NAME (olddecl) != NULL_TREE)
1444 error ((DECL_INITIAL (olddecl) && namespace_bindings_p ())
1445 ? "%q+#D previously defined here"
1446 : "%q+#D previously declared here", olddecl);
1447 return error_mark_node;
1449 else if (TREE_CODE (olddecl) == FUNCTION_DECL
1450 && DECL_INITIAL (olddecl) != NULL_TREE
1451 && TYPE_ARG_TYPES (TREE_TYPE (olddecl)) == NULL_TREE
1452 && TYPE_ARG_TYPES (TREE_TYPE (newdecl)) != NULL_TREE)
1454 /* Prototype decl follows defn w/o prototype. */
1455 warning (0, "prototype for %q+#D", newdecl);
1456 warning (0, "%Jfollows non-prototype definition here", olddecl);
1458 else if ((TREE_CODE (olddecl) == FUNCTION_DECL
1459 || TREE_CODE (olddecl) == VAR_DECL)
1460 && DECL_LANGUAGE (newdecl) != DECL_LANGUAGE (olddecl))
1463 If two declarations of the same function or object
1464 specify different linkage-specifications ..., the program
1465 is ill-formed.... Except for functions with C++ linkage,
1466 a function declaration without a linkage specification
1467 shall not precede the first linkage specification for
1468 that function. A function can be declared without a
1469 linkage specification after an explicit linkage
1470 specification has been seen; the linkage explicitly
1471 specified in the earlier declaration is not affected by
1472 such a function declaration.
1474 DR 563 raises the question why the restrictions on
1475 functions should not also apply to objects. Older
1476 versions of G++ silently ignore the linkage-specification
1484 which is clearly wrong. Therefore, we now treat objects
1486 if (current_lang_depth () == 0)
1488 /* There is no explicit linkage-specification, so we use
1489 the linkage from the previous declaration. */
1490 if (!DECL_LANG_SPECIFIC (newdecl))
1491 retrofit_lang_decl (newdecl);
1492 SET_DECL_LANGUAGE (newdecl, DECL_LANGUAGE (olddecl));
1496 error ("previous declaration of %q+#D with %qL linkage",
1497 olddecl, DECL_LANGUAGE (olddecl));
1498 error ("conflicts with new declaration with %qL linkage",
1499 DECL_LANGUAGE (newdecl));
1503 if (DECL_LANG_SPECIFIC (olddecl) && DECL_USE_TEMPLATE (olddecl))
1505 else if (TREE_CODE (olddecl) == FUNCTION_DECL)
1507 tree t1 = TYPE_ARG_TYPES (TREE_TYPE (olddecl));
1508 tree t2 = TYPE_ARG_TYPES (TREE_TYPE (newdecl));
1511 if (TREE_CODE (TREE_TYPE (newdecl)) == METHOD_TYPE)
1512 t1 = TREE_CHAIN (t1), t2 = TREE_CHAIN (t2);
1514 for (; t1 && t1 != void_list_node;
1515 t1 = TREE_CHAIN (t1), t2 = TREE_CHAIN (t2), i++)
1516 if (TREE_PURPOSE (t1) && TREE_PURPOSE (t2))
1518 if (1 == simple_cst_equal (TREE_PURPOSE (t1),
1521 pedwarn ("default argument given for parameter %d of %q#D",
1523 pedwarn ("after previous specification in %q+#D", olddecl);
1527 error ("default argument given for parameter %d of %q#D",
1529 error ("after previous specification in %q+#D",
1534 if (DECL_DECLARED_INLINE_P (newdecl)
1535 && ! DECL_DECLARED_INLINE_P (olddecl)
1536 && TREE_ADDRESSABLE (olddecl) && warn_inline)
1538 warning (0, "%q#D was used before it was declared inline", newdecl);
1539 warning (0, "%Jprevious non-inline declaration here", olddecl);
1544 /* Do not merge an implicit typedef with an explicit one. In:
1548 typedef class A A __attribute__ ((foo));
1550 the attribute should apply only to the typedef. */
1551 if (TREE_CODE (olddecl) == TYPE_DECL
1552 && (DECL_IMPLICIT_TYPEDEF_P (olddecl)
1553 || DECL_IMPLICIT_TYPEDEF_P (newdecl)))
1556 /* If new decl is `static' and an `extern' was seen previously,
1558 warn_extern_redeclared_static (newdecl, olddecl);
1560 /* We have committed to returning 1 at this point. */
1561 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1563 /* Now that functions must hold information normally held
1564 by field decls, there is extra work to do so that
1565 declaration information does not get destroyed during
1567 if (DECL_VINDEX (olddecl))
1568 DECL_VINDEX (newdecl) = DECL_VINDEX (olddecl);
1569 if (DECL_CONTEXT (olddecl))
1570 DECL_CONTEXT (newdecl) = DECL_CONTEXT (olddecl);
1571 DECL_STATIC_CONSTRUCTOR (newdecl) |= DECL_STATIC_CONSTRUCTOR (olddecl);
1572 DECL_STATIC_DESTRUCTOR (newdecl) |= DECL_STATIC_DESTRUCTOR (olddecl);
1573 DECL_PURE_VIRTUAL_P (newdecl) |= DECL_PURE_VIRTUAL_P (olddecl);
1574 DECL_VIRTUAL_P (newdecl) |= DECL_VIRTUAL_P (olddecl);
1575 DECL_THIS_STATIC (newdecl) |= DECL_THIS_STATIC (olddecl);
1576 if (DECL_OVERLOADED_OPERATOR_P (olddecl) != ERROR_MARK)
1577 SET_OVERLOADED_OPERATOR_CODE
1578 (newdecl, DECL_OVERLOADED_OPERATOR_P (olddecl));
1579 new_defines_function = DECL_INITIAL (newdecl) != NULL_TREE;
1581 /* Optionally warn about more than one declaration for the same
1582 name, but don't warn about a function declaration followed by a
1584 if (warn_redundant_decls && ! DECL_ARTIFICIAL (olddecl)
1585 && !(new_defines_function && DECL_INITIAL (olddecl) == NULL_TREE)
1586 /* Don't warn about extern decl followed by definition. */
1587 && !(DECL_EXTERNAL (olddecl) && ! DECL_EXTERNAL (newdecl))
1588 /* Don't warn about friends, let add_friend take care of it. */
1589 && ! (newdecl_is_friend || DECL_FRIEND_P (olddecl)))
1591 warning (OPT_Wredundant_decls, "redundant redeclaration of %qD in same scope", newdecl);
1592 warning (OPT_Wredundant_decls, "previous declaration of %q+D", olddecl);
1596 /* Deal with C++: must preserve virtual function table size. */
1597 if (TREE_CODE (olddecl) == TYPE_DECL)
1599 tree newtype = TREE_TYPE (newdecl);
1600 tree oldtype = TREE_TYPE (olddecl);
1602 if (newtype != error_mark_node && oldtype != error_mark_node
1603 && TYPE_LANG_SPECIFIC (newtype) && TYPE_LANG_SPECIFIC (oldtype))
1604 CLASSTYPE_FRIEND_CLASSES (newtype)
1605 = CLASSTYPE_FRIEND_CLASSES (oldtype);
1607 DECL_ORIGINAL_TYPE (newdecl) = DECL_ORIGINAL_TYPE (olddecl);
1610 /* Copy all the DECL_... slots specified in the new decl
1611 except for any that we copy here from the old type. */
1612 DECL_ATTRIBUTES (newdecl)
1613 = (*targetm.merge_decl_attributes) (olddecl, newdecl);
1615 if (TREE_CODE (newdecl) == TEMPLATE_DECL)
1619 old_result = DECL_TEMPLATE_RESULT (olddecl);
1620 new_result = DECL_TEMPLATE_RESULT (newdecl);
1621 TREE_TYPE (olddecl) = TREE_TYPE (old_result);
1622 DECL_TEMPLATE_SPECIALIZATIONS (olddecl)
1623 = chainon (DECL_TEMPLATE_SPECIALIZATIONS (olddecl),
1624 DECL_TEMPLATE_SPECIALIZATIONS (newdecl));
1626 if (DECL_FUNCTION_TEMPLATE_P (newdecl))
1628 DECL_INLINE (old_result)
1629 |= DECL_INLINE (new_result);
1630 DECL_DECLARED_INLINE_P (old_result)
1631 |= DECL_DECLARED_INLINE_P (new_result);
1632 check_redeclaration_exception_specification (newdecl, olddecl);
1635 /* If the new declaration is a definition, update the file and
1636 line information on the declaration. */
1637 if (DECL_INITIAL (old_result) == NULL_TREE
1638 && DECL_INITIAL (new_result) != NULL_TREE)
1640 DECL_SOURCE_LOCATION (olddecl)
1641 = DECL_SOURCE_LOCATION (old_result)
1642 = DECL_SOURCE_LOCATION (newdecl);
1643 if (DECL_FUNCTION_TEMPLATE_P (newdecl))
1644 DECL_ARGUMENTS (old_result)
1645 = DECL_ARGUMENTS (new_result);
1653 /* Automatically handles default parameters. */
1654 tree oldtype = TREE_TYPE (olddecl);
1657 /* Merge the data types specified in the two decls. */
1658 newtype = merge_types (TREE_TYPE (newdecl), TREE_TYPE (olddecl));
1660 /* If merge_types produces a non-typedef type, just use the old type. */
1661 if (TREE_CODE (newdecl) == TYPE_DECL
1662 && newtype == DECL_ORIGINAL_TYPE (newdecl))
1665 if (TREE_CODE (newdecl) == VAR_DECL)
1667 DECL_THIS_EXTERN (newdecl) |= DECL_THIS_EXTERN (olddecl);
1668 DECL_INITIALIZED_P (newdecl) |= DECL_INITIALIZED_P (olddecl);
1669 DECL_NONTRIVIALLY_INITIALIZED_P (newdecl)
1670 |= DECL_NONTRIVIALLY_INITIALIZED_P (olddecl);
1671 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (newdecl)
1672 |= DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (olddecl);
1674 /* Merge the threadprivate attribute from OLDDECL into NEWDECL. */
1675 if (DECL_LANG_SPECIFIC (olddecl)
1676 && CP_DECL_THREADPRIVATE_P (olddecl))
1678 /* Allocate a LANG_SPECIFIC structure for NEWDECL, if needed. */
1679 if (!DECL_LANG_SPECIFIC (newdecl))
1680 retrofit_lang_decl (newdecl);
1682 DECL_TLS_MODEL (newdecl) = DECL_TLS_MODEL (olddecl);
1683 CP_DECL_THREADPRIVATE_P (newdecl) = 1;
1687 /* Do this after calling `merge_types' so that default
1688 parameters don't confuse us. */
1689 else if (TREE_CODE (newdecl) == FUNCTION_DECL)
1690 check_redeclaration_exception_specification (newdecl, olddecl);
1691 TREE_TYPE (newdecl) = TREE_TYPE (olddecl) = newtype;
1693 /* Lay the type out, unless already done. */
1694 if (! same_type_p (newtype, oldtype)
1695 && TREE_TYPE (newdecl) != error_mark_node
1696 && !(processing_template_decl && uses_template_parms (newdecl)))
1697 layout_type (TREE_TYPE (newdecl));
1699 if ((TREE_CODE (newdecl) == VAR_DECL
1700 || TREE_CODE (newdecl) == PARM_DECL
1701 || TREE_CODE (newdecl) == RESULT_DECL
1702 || TREE_CODE (newdecl) == FIELD_DECL
1703 || TREE_CODE (newdecl) == TYPE_DECL)
1704 && !(processing_template_decl && uses_template_parms (newdecl)))
1705 layout_decl (newdecl, 0);
1707 /* Merge the type qualifiers. */
1708 if (TREE_READONLY (newdecl))
1709 TREE_READONLY (olddecl) = 1;
1710 if (TREE_THIS_VOLATILE (newdecl))
1711 TREE_THIS_VOLATILE (olddecl) = 1;
1712 if (TREE_NOTHROW (newdecl))
1713 TREE_NOTHROW (olddecl) = 1;
1715 /* Merge deprecatedness. */
1716 if (TREE_DEPRECATED (newdecl))
1717 TREE_DEPRECATED (olddecl) = 1;
1719 /* Merge the initialization information. */
1720 if (DECL_INITIAL (newdecl) == NULL_TREE
1721 && DECL_INITIAL (olddecl) != NULL_TREE)
1723 DECL_INITIAL (newdecl) = DECL_INITIAL (olddecl);
1724 DECL_SOURCE_LOCATION (newdecl) = DECL_SOURCE_LOCATION (olddecl);
1725 if (CAN_HAVE_FULL_LANG_DECL_P (newdecl)
1726 && DECL_LANG_SPECIFIC (newdecl)
1727 && DECL_LANG_SPECIFIC (olddecl))
1729 DECL_SAVED_TREE (newdecl) = DECL_SAVED_TREE (olddecl);
1730 DECL_STRUCT_FUNCTION (newdecl) = DECL_STRUCT_FUNCTION (olddecl);
1734 /* Merge the section attribute.
1735 We want to issue an error if the sections conflict but that must be
1736 done later in decl_attributes since we are called before attributes
1738 if (DECL_SECTION_NAME (newdecl) == NULL_TREE)
1739 DECL_SECTION_NAME (newdecl) = DECL_SECTION_NAME (olddecl);
1741 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1743 DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (newdecl)
1744 |= DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (olddecl);
1745 DECL_NO_LIMIT_STACK (newdecl) |= DECL_NO_LIMIT_STACK (olddecl);
1746 TREE_THIS_VOLATILE (newdecl) |= TREE_THIS_VOLATILE (olddecl);
1747 TREE_READONLY (newdecl) |= TREE_READONLY (olddecl);
1748 TREE_NOTHROW (newdecl) |= TREE_NOTHROW (olddecl);
1749 DECL_IS_MALLOC (newdecl) |= DECL_IS_MALLOC (olddecl);
1750 DECL_IS_PURE (newdecl) |= DECL_IS_PURE (olddecl);
1751 /* Keep the old RTL. */
1752 COPY_DECL_RTL (olddecl, newdecl);
1754 else if (TREE_CODE (newdecl) == VAR_DECL
1755 && (DECL_SIZE (olddecl) || !DECL_SIZE (newdecl)))
1757 /* Keep the old RTL. We cannot keep the old RTL if the old
1758 declaration was for an incomplete object and the new
1759 declaration is not since many attributes of the RTL will
1761 COPY_DECL_RTL (olddecl, newdecl);
1764 /* If cannot merge, then use the new type and qualifiers,
1765 and don't preserve the old rtl. */
1768 /* Clean out any memory we had of the old declaration. */
1769 tree oldstatic = value_member (olddecl, static_aggregates);
1771 TREE_VALUE (oldstatic) = error_mark_node;
1773 TREE_TYPE (olddecl) = TREE_TYPE (newdecl);
1774 TREE_READONLY (olddecl) = TREE_READONLY (newdecl);
1775 TREE_THIS_VOLATILE (olddecl) = TREE_THIS_VOLATILE (newdecl);
1776 TREE_SIDE_EFFECTS (olddecl) = TREE_SIDE_EFFECTS (newdecl);
1779 /* Merge the storage class information. */
1780 merge_weak (newdecl, olddecl);
1782 DECL_ONE_ONLY (newdecl) |= DECL_ONE_ONLY (olddecl);
1783 DECL_DEFER_OUTPUT (newdecl) |= DECL_DEFER_OUTPUT (olddecl);
1784 TREE_PUBLIC (newdecl) = TREE_PUBLIC (olddecl);
1785 TREE_STATIC (olddecl) = TREE_STATIC (newdecl) |= TREE_STATIC (olddecl);
1786 if (! DECL_EXTERNAL (olddecl))
1787 DECL_EXTERNAL (newdecl) = 0;
1789 new_template = NULL_TREE;
1790 if (DECL_LANG_SPECIFIC (newdecl) && DECL_LANG_SPECIFIC (olddecl))
1792 DECL_INTERFACE_KNOWN (newdecl) |= DECL_INTERFACE_KNOWN (olddecl);
1793 DECL_NOT_REALLY_EXTERN (newdecl) |= DECL_NOT_REALLY_EXTERN (olddecl);
1794 DECL_COMDAT (newdecl) |= DECL_COMDAT (olddecl);
1795 DECL_TEMPLATE_INSTANTIATED (newdecl)
1796 |= DECL_TEMPLATE_INSTANTIATED (olddecl);
1798 /* If the OLDDECL is an instantiation and/or specialization,
1799 then the NEWDECL must be too. But, it may not yet be marked
1800 as such if the caller has created NEWDECL, but has not yet
1801 figured out that it is a redeclaration. */
1802 if (!DECL_USE_TEMPLATE (newdecl))
1803 DECL_USE_TEMPLATE (newdecl) = DECL_USE_TEMPLATE (olddecl);
1805 /* Don't really know how much of the language-specific
1806 values we should copy from old to new. */
1807 DECL_IN_AGGR_P (newdecl) = DECL_IN_AGGR_P (olddecl);
1808 DECL_LANG_SPECIFIC (newdecl)->decl_flags.u2 =
1809 DECL_LANG_SPECIFIC (olddecl)->decl_flags.u2;
1810 DECL_NONCONVERTING_P (newdecl) = DECL_NONCONVERTING_P (olddecl);
1811 DECL_REPO_AVAILABLE_P (newdecl) = DECL_REPO_AVAILABLE_P (olddecl);
1812 if (DECL_TEMPLATE_INFO (newdecl))
1813 new_template = DECL_TI_TEMPLATE (newdecl);
1814 DECL_TEMPLATE_INFO (newdecl) = DECL_TEMPLATE_INFO (olddecl);
1815 DECL_INITIALIZED_IN_CLASS_P (newdecl)
1816 |= DECL_INITIALIZED_IN_CLASS_P (olddecl);
1817 olddecl_friend = DECL_FRIEND_P (olddecl);
1818 hidden_friend = (DECL_ANTICIPATED (olddecl)
1819 && DECL_HIDDEN_FRIEND_P (olddecl)
1820 && newdecl_is_friend);
1822 /* Only functions have DECL_BEFRIENDING_CLASSES. */
1823 if (TREE_CODE (newdecl) == FUNCTION_DECL
1824 || DECL_FUNCTION_TEMPLATE_P (newdecl))
1826 DECL_BEFRIENDING_CLASSES (newdecl)
1827 = chainon (DECL_BEFRIENDING_CLASSES (newdecl),
1828 DECL_BEFRIENDING_CLASSES (olddecl));
1829 /* DECL_THUNKS is only valid for virtual functions,
1830 otherwise it is a DECL_FRIEND_CONTEXT. */
1831 if (DECL_VIRTUAL_P (newdecl))
1832 DECL_THUNKS (newdecl) = DECL_THUNKS (olddecl);
1836 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1838 if (DECL_TEMPLATE_INSTANTIATION (olddecl)
1839 && !DECL_TEMPLATE_INSTANTIATION (newdecl))
1841 /* If newdecl is not a specialization, then it is not a
1842 template-related function at all. And that means that we
1843 should have exited above, returning 0. */
1844 gcc_assert (DECL_TEMPLATE_SPECIALIZATION (newdecl));
1846 if (TREE_USED (olddecl))
1847 /* From [temp.expl.spec]:
1849 If a template, a member template or the member of a class
1850 template is explicitly specialized then that
1851 specialization shall be declared before the first use of
1852 that specialization that would cause an implicit
1853 instantiation to take place, in every translation unit in
1854 which such a use occurs. */
1855 error ("explicit specialization of %qD after first use",
1858 SET_DECL_TEMPLATE_SPECIALIZATION (olddecl);
1860 /* Don't propagate visibility from the template to the
1861 specialization here. We'll do that in determine_visibility if
1863 DECL_VISIBILITY_SPECIFIED (olddecl) = 0;
1865 /* [temp.expl.spec/14] We don't inline explicit specialization
1866 just because the primary template says so. */
1870 if (DECL_PENDING_INLINE_INFO (newdecl) == 0)
1871 DECL_PENDING_INLINE_INFO (newdecl) = DECL_PENDING_INLINE_INFO (olddecl);
1873 DECL_DECLARED_INLINE_P (newdecl) |= DECL_DECLARED_INLINE_P (olddecl);
1875 /* If either decl says `inline', this fn is inline, unless
1876 its definition was passed already. */
1877 if (DECL_INLINE (newdecl) && DECL_INITIAL (olddecl) == NULL_TREE)
1878 DECL_INLINE (olddecl) = 1;
1879 DECL_INLINE (newdecl) = DECL_INLINE (olddecl);
1881 DECL_UNINLINABLE (newdecl) = DECL_UNINLINABLE (olddecl)
1882 = (DECL_UNINLINABLE (newdecl) || DECL_UNINLINABLE (olddecl));
1885 /* Preserve abstractness on cloned [cd]tors. */
1886 DECL_ABSTRACT (newdecl) = DECL_ABSTRACT (olddecl);
1890 SET_DECL_LANGUAGE (olddecl, DECL_LANGUAGE (newdecl));
1891 COPY_DECL_ASSEMBLER_NAME (newdecl, olddecl);
1892 COPY_DECL_RTL (newdecl, olddecl);
1894 if (! types_match || new_defines_function)
1896 /* These need to be copied so that the names are available.
1897 Note that if the types do match, we'll preserve inline
1898 info and other bits, but if not, we won't. */
1899 DECL_ARGUMENTS (olddecl) = DECL_ARGUMENTS (newdecl);
1900 DECL_RESULT (olddecl) = DECL_RESULT (newdecl);
1902 if (new_defines_function)
1903 /* If defining a function declared with other language
1904 linkage, use the previously declared language linkage. */
1905 SET_DECL_LANGUAGE (newdecl, DECL_LANGUAGE (olddecl));
1906 else if (types_match)
1908 /* If redeclaring a builtin function, and not a definition,
1909 it stays built in. */
1910 if (DECL_BUILT_IN (olddecl))
1912 DECL_BUILT_IN_CLASS (newdecl) = DECL_BUILT_IN_CLASS (olddecl);
1913 DECL_FUNCTION_CODE (newdecl) = DECL_FUNCTION_CODE (olddecl);
1914 /* If we're keeping the built-in definition, keep the rtl,
1915 regardless of declaration matches. */
1916 COPY_DECL_RTL (olddecl, newdecl);
1919 DECL_RESULT (newdecl) = DECL_RESULT (olddecl);
1920 /* Don't clear out the arguments if we're redefining a function. */
1921 if (DECL_ARGUMENTS (olddecl))
1922 DECL_ARGUMENTS (newdecl) = DECL_ARGUMENTS (olddecl);
1925 else if (TREE_CODE (newdecl) == NAMESPACE_DECL)
1926 NAMESPACE_LEVEL (newdecl) = NAMESPACE_LEVEL (olddecl);
1928 /* Now preserve various other info from the definition. */
1929 TREE_ADDRESSABLE (newdecl) = TREE_ADDRESSABLE (olddecl);
1930 TREE_ASM_WRITTEN (newdecl) = TREE_ASM_WRITTEN (olddecl);
1931 DECL_COMMON (newdecl) = DECL_COMMON (olddecl);
1932 COPY_DECL_ASSEMBLER_NAME (olddecl, newdecl);
1934 /* Warn about conflicting visibility specifications. */
1935 if (DECL_VISIBILITY_SPECIFIED (olddecl)
1936 && DECL_VISIBILITY_SPECIFIED (newdecl)
1937 && DECL_VISIBILITY (newdecl) != DECL_VISIBILITY (olddecl))
1939 warning (OPT_Wattributes, "%q+D: visibility attribute ignored "
1940 "because it", newdecl);
1941 warning (OPT_Wattributes, "%Jconflicts with previous "
1942 "declaration here", olddecl);
1944 /* Choose the declaration which specified visibility. */
1945 if (DECL_VISIBILITY_SPECIFIED (olddecl))
1947 DECL_VISIBILITY (newdecl) = DECL_VISIBILITY (olddecl);
1948 DECL_VISIBILITY_SPECIFIED (newdecl) = 1;
1950 /* Init priority used to be merged from newdecl to olddecl by the memcpy,
1951 so keep this behavior. */
1952 if (TREE_CODE (newdecl) == VAR_DECL && DECL_HAS_INIT_PRIORITY_P (newdecl))
1954 SET_DECL_INIT_PRIORITY (olddecl, DECL_INIT_PRIORITY (newdecl));
1955 DECL_HAS_INIT_PRIORITY_P (olddecl) = 1;
1958 /* The DECL_LANG_SPECIFIC information in OLDDECL will be replaced
1959 with that from NEWDECL below. */
1960 if (DECL_LANG_SPECIFIC (olddecl))
1962 gcc_assert (DECL_LANG_SPECIFIC (olddecl)
1963 != DECL_LANG_SPECIFIC (newdecl));
1964 ggc_free (DECL_LANG_SPECIFIC (olddecl));
1967 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1971 function_size = sizeof (struct tree_decl_common);
1973 memcpy ((char *) olddecl + sizeof (struct tree_common),
1974 (char *) newdecl + sizeof (struct tree_common),
1975 function_size - sizeof (struct tree_common));
1977 memcpy ((char *) olddecl + sizeof (struct tree_decl_common),
1978 (char *) newdecl + sizeof (struct tree_decl_common),
1979 sizeof (struct tree_function_decl) - sizeof (struct tree_decl_common));
1981 /* If newdecl is a template instantiation, it is possible that
1982 the following sequence of events has occurred:
1984 o A friend function was declared in a class template. The
1985 class template was instantiated.
1987 o The instantiation of the friend declaration was
1988 recorded on the instantiation list, and is newdecl.
1990 o Later, however, instantiate_class_template called pushdecl
1991 on the newdecl to perform name injection. But, pushdecl in
1992 turn called duplicate_decls when it discovered that another
1993 declaration of a global function with the same name already
1996 o Here, in duplicate_decls, we decided to clobber newdecl.
1998 If we're going to do that, we'd better make sure that
1999 olddecl, and not newdecl, is on the list of
2000 instantiations so that if we try to do the instantiation
2001 again we won't get the clobbered declaration. */
2002 reregister_specialization (newdecl,
2008 size_t size = tree_code_size (TREE_CODE (olddecl));
2009 memcpy ((char *) olddecl + sizeof (struct tree_common),
2010 (char *) newdecl + sizeof (struct tree_common),
2011 sizeof (struct tree_decl_common) - sizeof (struct tree_common));
2012 switch (TREE_CODE (olddecl))
2022 memcpy ((char *) olddecl + sizeof (struct tree_decl_common),
2023 (char *) newdecl + sizeof (struct tree_decl_common),
2024 size - sizeof (struct tree_decl_common)
2025 + TREE_CODE_LENGTH (TREE_CODE (newdecl)) * sizeof (char *));
2029 memcpy ((char *) olddecl + sizeof (struct tree_decl_common),
2030 (char *) newdecl + sizeof (struct tree_decl_common),
2031 sizeof (struct tree_decl_non_common) - sizeof (struct tree_decl_common)
2032 + TREE_CODE_LENGTH (TREE_CODE (newdecl)) * sizeof (char *));
2036 DECL_UID (olddecl) = olddecl_uid;
2038 DECL_FRIEND_P (olddecl) = 1;
2041 DECL_ANTICIPATED (olddecl) = 1;
2042 DECL_HIDDEN_FRIEND_P (olddecl) = 1;
2045 /* NEWDECL contains the merged attribute lists.
2046 Update OLDDECL to be the same. */
2047 DECL_ATTRIBUTES (olddecl) = DECL_ATTRIBUTES (newdecl);
2049 /* If OLDDECL had its DECL_RTL instantiated, re-invoke make_decl_rtl
2050 so that encode_section_info has a chance to look at the new decl
2051 flags and attributes. */
2052 if (DECL_RTL_SET_P (olddecl)
2053 && (TREE_CODE (olddecl) == FUNCTION_DECL
2054 || (TREE_CODE (olddecl) == VAR_DECL
2055 && TREE_STATIC (olddecl))))
2056 make_decl_rtl (olddecl);
2058 /* The NEWDECL will no longer be needed. Because every out-of-class
2059 declaration of a member results in a call to duplicate_decls,
2060 freeing these nodes represents in a significant savings. */
2066 /* Return zero if the declaration NEWDECL is valid
2067 when the declaration OLDDECL (assumed to be for the same name)
2068 has already been seen.
2069 Otherwise return an error message format string with a %s
2070 where the identifier should go. */
2073 redeclaration_error_message (tree newdecl, tree olddecl)
2075 if (TREE_CODE (newdecl) == TYPE_DECL)
2077 /* Because C++ can put things into name space for free,
2078 constructs like "typedef struct foo { ... } foo"
2079 would look like an erroneous redeclaration. */
2080 if (same_type_p (TREE_TYPE (newdecl), TREE_TYPE (olddecl)))
2083 return "redefinition of %q#D";
2085 else if (TREE_CODE (newdecl) == FUNCTION_DECL)
2087 /* If this is a pure function, its olddecl will actually be
2088 the original initialization to `0' (which we force to call
2089 abort()). Don't complain about redefinition in this case. */
2090 if (DECL_LANG_SPECIFIC (olddecl) && DECL_PURE_VIRTUAL_P (olddecl)
2091 && DECL_INITIAL (olddecl) == NULL_TREE)
2094 /* If both functions come from different namespaces, this is not
2095 a redeclaration - this is a conflict with a used function. */
2096 if (DECL_NAMESPACE_SCOPE_P (olddecl)
2097 && DECL_CONTEXT (olddecl) != DECL_CONTEXT (newdecl)
2098 && ! decls_match (olddecl, newdecl))
2099 return "%qD conflicts with used function";
2101 /* We'll complain about linkage mismatches in
2102 warn_extern_redeclared_static. */
2104 /* Defining the same name twice is no good. */
2105 if (DECL_INITIAL (olddecl) != NULL_TREE
2106 && DECL_INITIAL (newdecl) != NULL_TREE)
2108 if (DECL_NAME (olddecl) == NULL_TREE)
2109 return "%q#D not declared in class";
2111 return "redefinition of %q#D";
2115 else if (TREE_CODE (newdecl) == TEMPLATE_DECL)
2119 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == TYPE_DECL)
2121 if (COMPLETE_TYPE_P (TREE_TYPE (newdecl))
2122 && COMPLETE_TYPE_P (TREE_TYPE (olddecl)))
2123 return "redefinition of %q#D";
2127 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) != FUNCTION_DECL
2128 || (DECL_TEMPLATE_RESULT (newdecl)
2129 == DECL_TEMPLATE_RESULT (olddecl)))
2132 nt = DECL_TEMPLATE_RESULT (newdecl);
2133 if (DECL_TEMPLATE_INFO (nt))
2134 nt = DECL_TEMPLATE_RESULT (template_for_substitution (nt));
2135 ot = DECL_TEMPLATE_RESULT (olddecl);
2136 if (DECL_TEMPLATE_INFO (ot))
2137 ot = DECL_TEMPLATE_RESULT (template_for_substitution (ot));
2138 if (DECL_INITIAL (nt) && DECL_INITIAL (ot))
2139 return "redefinition of %q#D";
2143 else if (TREE_CODE (newdecl) == VAR_DECL
2144 && DECL_THREAD_LOCAL_P (newdecl) != DECL_THREAD_LOCAL_P (olddecl)
2145 && (! DECL_LANG_SPECIFIC (olddecl)
2146 || ! CP_DECL_THREADPRIVATE_P (olddecl)
2147 || DECL_THREAD_LOCAL_P (newdecl)))
2149 /* Only variables can be thread-local, and all declarations must
2150 agree on this property. */
2151 if (DECL_THREAD_LOCAL_P (newdecl))
2152 return "thread-local declaration of %q#D follows "
2153 "non-thread-local declaration";
2155 return "non-thread-local declaration of %q#D follows "
2156 "thread-local declaration";
2158 else if (toplevel_bindings_p () || DECL_NAMESPACE_SCOPE_P (newdecl))
2160 /* Objects declared at top level: */
2161 /* If at least one is a reference, it's ok. */
2162 if (DECL_EXTERNAL (newdecl) || DECL_EXTERNAL (olddecl))
2164 /* Reject two definitions. */
2165 return "redefinition of %q#D";
2169 /* Objects declared with block scope: */
2170 /* Reject two definitions, and reject a definition
2171 together with an external reference. */
2172 if (!(DECL_EXTERNAL (newdecl) && DECL_EXTERNAL (olddecl)))
2173 return "redeclaration of %q#D";
2178 /* Hash and equality functions for the named_label table. */
2181 named_label_entry_hash (const void *data)
2183 const struct named_label_entry *ent = (const struct named_label_entry *) data;
2184 return DECL_UID (ent->label_decl);
2188 named_label_entry_eq (const void *a, const void *b)
2190 const struct named_label_entry *ent_a = (const struct named_label_entry *) a;
2191 const struct named_label_entry *ent_b = (const struct named_label_entry *) b;
2192 return ent_a->label_decl == ent_b->label_decl;
2195 /* Create a new label, named ID. */
2198 make_label_decl (tree id, int local_p)
2200 struct named_label_entry *ent;
2204 decl = build_decl (LABEL_DECL, id, void_type_node);
2206 DECL_CONTEXT (decl) = current_function_decl;
2207 DECL_MODE (decl) = VOIDmode;
2208 C_DECLARED_LABEL_FLAG (decl) = local_p;
2210 /* Say where one reference is to the label, for the sake of the
2211 error if it is not defined. */
2212 DECL_SOURCE_LOCATION (decl) = input_location;
2214 /* Record the fact that this identifier is bound to this label. */
2215 SET_IDENTIFIER_LABEL_VALUE (id, decl);
2217 /* Create the label htab for the function on demand. */
2219 named_labels = htab_create_ggc (13, named_label_entry_hash,
2220 named_label_entry_eq, NULL);
2222 /* Record this label on the list of labels used in this function.
2223 We do this before calling make_label_decl so that we get the
2224 IDENTIFIER_LABEL_VALUE before the new label is declared. */
2225 ent = GGC_CNEW (struct named_label_entry);
2226 ent->label_decl = decl;
2228 slot = htab_find_slot (named_labels, ent, INSERT);
2229 gcc_assert (*slot == NULL);
2235 /* Look for a label named ID in the current function. If one cannot
2236 be found, create one. (We keep track of used, but undefined,
2237 labels, and complain about them at the end of a function.) */
2240 lookup_label (tree id)
2244 timevar_push (TV_NAME_LOOKUP);
2245 /* You can't use labels at global scope. */
2246 if (current_function_decl == NULL_TREE)
2248 error ("label %qE referenced outside of any function", id);
2249 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, NULL_TREE);
2252 /* See if we've already got this label. */
2253 decl = IDENTIFIER_LABEL_VALUE (id);
2254 if (decl != NULL_TREE && DECL_CONTEXT (decl) == current_function_decl)
2255 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, decl);
2257 decl = make_label_decl (id, /*local_p=*/0);
2258 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, decl);
2261 /* Declare a local label named ID. */
2264 declare_local_label (tree id)
2268 /* Add a new entry to the SHADOWED_LABELS list so that when we leave
2269 this scope we can restore the old value of IDENTIFIER_TYPE_VALUE. */
2270 shadow = tree_cons (IDENTIFIER_LABEL_VALUE (id), NULL_TREE,
2271 current_binding_level->shadowed_labels);
2272 current_binding_level->shadowed_labels = shadow;
2274 decl = make_label_decl (id, /*local_p=*/1);
2275 TREE_VALUE (shadow) = decl;
2280 /* Returns nonzero if it is ill-formed to jump past the declaration of
2281 DECL. Returns 2 if it's also a real problem. */
2284 decl_jump_unsafe (tree decl)
2286 if (TREE_CODE (decl) != VAR_DECL || TREE_STATIC (decl)
2287 || TREE_TYPE (decl) == error_mark_node)
2290 if (TYPE_NEEDS_CONSTRUCTING (TREE_TYPE (decl))
2291 || DECL_NONTRIVIALLY_INITIALIZED_P (decl))
2294 if (pod_type_p (TREE_TYPE (decl)))
2297 /* The POD stuff is just pedantry; why should it matter if the class
2298 contains a field of pointer to member type? */
2302 /* A subroutine of check_previous_goto_1 to identify a branch to the user. */
2305 identify_goto (tree decl, const location_t *locus)
2308 pedwarn ("jump to label %qD", decl);
2310 pedwarn ("jump to case label");
2312 pedwarn ("%H from here", locus);
2315 /* Check that a single previously seen jump to a newly defined label
2316 is OK. DECL is the LABEL_DECL or 0; LEVEL is the binding_level for
2317 the jump context; NAMES are the names in scope in LEVEL at the jump
2318 context; LOCUS is the source position of the jump or 0. Returns
2319 true if all is well. */
2322 check_previous_goto_1 (tree decl, struct cp_binding_level* level, tree names,
2323 bool exited_omp, const location_t *locus)
2325 struct cp_binding_level *b;
2326 bool identified = false, saw_eh = false, saw_omp = false;
2330 identify_goto (decl, locus);
2331 error (" exits OpenMP structured block");
2332 identified = saw_omp = true;
2335 for (b = current_binding_level; b ; b = b->level_chain)
2337 tree new_decls, old_decls = (b == level ? names : NULL_TREE);
2339 for (new_decls = b->names; new_decls != old_decls;
2340 new_decls = TREE_CHAIN (new_decls))
2342 int problem = decl_jump_unsafe (new_decls);
2348 identify_goto (decl, locus);
2352 error (" crosses initialization of %q+#D", new_decls);
2354 pedwarn (" enters scope of non-POD %q+#D", new_decls);
2359 if ((b->kind == sk_try || b->kind == sk_catch) && !saw_eh)
2363 identify_goto (decl, locus);
2366 if (b->kind == sk_try)
2367 error (" enters try block");
2369 error (" enters catch block");
2372 if (b->kind == sk_omp && !saw_omp)
2376 identify_goto (decl, locus);
2379 error (" enters OpenMP structured block");
2388 check_previous_goto (tree decl, struct named_label_use_entry *use)
2390 check_previous_goto_1 (decl, use->binding_level,
2391 use->names_in_scope, use->in_omp_scope,
2392 &use->o_goto_locus);
2396 check_switch_goto (struct cp_binding_level* level)
2398 return check_previous_goto_1 (NULL_TREE, level, level->names, false, NULL);
2401 /* Check that a new jump to a label DECL is OK. Called by
2402 finish_goto_stmt. */
2405 check_goto (tree decl)
2407 struct named_label_entry *ent, dummy;
2408 bool saw_catch = false, identified = false;
2411 /* We can't know where a computed goto is jumping.
2412 So we assume that it's OK. */
2413 if (TREE_CODE (decl) != LABEL_DECL)
2416 /* We didn't record any information about this label when we created it,
2417 and there's not much point since it's trivial to analyze as a return. */
2418 if (decl == cdtor_label)
2421 dummy.label_decl = decl;
2422 ent = (struct named_label_entry *) htab_find (named_labels, &dummy);
2423 gcc_assert (ent != NULL);
2425 /* If the label hasn't been defined yet, defer checking. */
2426 if (! DECL_INITIAL (decl))
2428 struct named_label_use_entry *new_use;
2430 /* Don't bother creating another use if the last goto had the
2431 same data, and will therefore create the same set of errors. */
2433 && ent->uses->names_in_scope == current_binding_level->names)
2436 new_use = GGC_NEW (struct named_label_use_entry);
2437 new_use->binding_level = current_binding_level;
2438 new_use->names_in_scope = current_binding_level->names;
2439 new_use->o_goto_locus = input_location;
2440 new_use->in_omp_scope = false;
2442 new_use->next = ent->uses;
2443 ent->uses = new_use;
2447 if (ent->in_try_scope || ent->in_catch_scope
2448 || ent->in_omp_scope || ent->bad_decls)
2450 pedwarn ("jump to label %q+D", decl);
2451 pedwarn (" from here");
2455 for (bad = ent->bad_decls; bad; bad = TREE_CHAIN (bad))
2457 tree b = TREE_VALUE (bad);
2458 int u = decl_jump_unsafe (b);
2460 if (u > 1 && DECL_ARTIFICIAL (b))
2462 /* Can't skip init of __exception_info. */
2463 error ("%J enters catch block", b);
2467 error (" skips initialization of %q+#D", b);
2469 pedwarn (" enters scope of non-POD %q+#D", b);
2472 if (ent->in_try_scope)
2473 error (" enters try block");
2474 else if (ent->in_catch_scope && !saw_catch)
2475 error (" enters catch block");
2477 if (ent->in_omp_scope)
2478 error (" enters OpenMP structured block");
2479 else if (flag_openmp)
2481 struct cp_binding_level *b;
2482 for (b = current_binding_level; b ; b = b->level_chain)
2484 if (b == ent->binding_level)
2486 if (b->kind == sk_omp)
2490 pedwarn ("jump to label %q+D", decl);
2491 pedwarn (" from here");
2494 error (" exits OpenMP structured block");
2501 /* Check that a return is ok wrt OpenMP structured blocks.
2502 Called by finish_return_stmt. Returns true if all is well. */
2505 check_omp_return (void)
2507 struct cp_binding_level *b;
2508 for (b = current_binding_level; b ; b = b->level_chain)
2509 if (b->kind == sk_omp)
2511 error ("invalid exit from OpenMP structured block");
2517 /* Define a label, specifying the location in the source file.
2518 Return the LABEL_DECL node for the label. */
2521 define_label (location_t location, tree name)
2523 struct named_label_entry *ent, dummy;
2524 struct cp_binding_level *p;
2527 timevar_push (TV_NAME_LOOKUP);
2529 decl = lookup_label (name);
2531 dummy.label_decl = decl;
2532 ent = (struct named_label_entry *) htab_find (named_labels, &dummy);
2533 gcc_assert (ent != NULL);
2535 /* After labels, make any new cleanups in the function go into their
2536 own new (temporary) binding contour. */
2537 for (p = current_binding_level;
2538 p->kind != sk_function_parms;
2540 p->more_cleanups_ok = 0;
2542 if (name == get_identifier ("wchar_t"))
2543 pedwarn ("label named wchar_t");
2545 if (DECL_INITIAL (decl) != NULL_TREE)
2547 error ("duplicate label %qD", decl);
2548 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
2552 struct named_label_use_entry *use;
2554 /* Mark label as having been defined. */
2555 DECL_INITIAL (decl) = error_mark_node;
2556 /* Say where in the source. */
2557 DECL_SOURCE_LOCATION (decl) = location;
2559 ent->binding_level = current_binding_level;
2560 ent->names_in_scope = current_binding_level->names;
2562 for (use = ent->uses; use ; use = use->next)
2563 check_previous_goto (decl, use);
2567 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, decl);
2572 struct cp_binding_level *level;
2573 struct cp_switch *next;
2574 /* The SWITCH_STMT being built. */
2576 /* A splay-tree mapping the low element of a case range to the high
2577 element, or NULL_TREE if there is no high element. Used to
2578 determine whether or not a new case label duplicates an old case
2579 label. We need a tree, rather than simply a hash table, because
2580 of the GNU case range extension. */
2584 /* A stack of the currently active switch statements. The innermost
2585 switch statement is on the top of the stack. There is no need to
2586 mark the stack for garbage collection because it is only active
2587 during the processing of the body of a function, and we never
2588 collect at that point. */
2590 static struct cp_switch *switch_stack;
2592 /* Called right after a switch-statement condition is parsed.
2593 SWITCH_STMT is the switch statement being parsed. */
2596 push_switch (tree switch_stmt)
2598 struct cp_switch *p = XNEW (struct cp_switch);
2599 p->level = current_binding_level;
2600 p->next = switch_stack;
2601 p->switch_stmt = switch_stmt;
2602 p->cases = splay_tree_new (case_compare, NULL, NULL);
2609 struct cp_switch *cs = switch_stack;
2610 location_t switch_location;
2612 /* Emit warnings as needed. */
2613 if (EXPR_HAS_LOCATION (cs->switch_stmt))
2614 switch_location = EXPR_LOCATION (cs->switch_stmt);
2616 switch_location = input_location;
2617 if (!processing_template_decl)
2618 c_do_switch_warnings (cs->cases, switch_location,
2619 SWITCH_STMT_TYPE (cs->switch_stmt),
2620 SWITCH_STMT_COND (cs->switch_stmt));
2622 splay_tree_delete (cs->cases);
2623 switch_stack = switch_stack->next;
2627 /* Note that we've seen a definition of a case label, and complain if this
2628 is a bad place for one. */
2631 finish_case_label (tree low_value, tree high_value)
2634 struct cp_binding_level *p;
2636 if (processing_template_decl)
2640 /* For templates, just add the case label; we'll do semantic
2641 analysis at instantiation-time. */
2642 label = build_decl (LABEL_DECL, NULL_TREE, NULL_TREE);
2643 return add_stmt (build_case_label (low_value, high_value, label));
2646 /* Find the condition on which this switch statement depends. */
2647 cond = SWITCH_STMT_COND (switch_stack->switch_stmt);
2648 if (cond && TREE_CODE (cond) == TREE_LIST)
2649 cond = TREE_VALUE (cond);
2651 if (!check_switch_goto (switch_stack->level))
2652 return error_mark_node;
2654 r = c_add_case_label (switch_stack->cases, cond, TREE_TYPE (cond),
2655 low_value, high_value);
2657 /* After labels, make any new cleanups in the function go into their
2658 own new (temporary) binding contour. */
2659 for (p = current_binding_level;
2660 p->kind != sk_function_parms;
2662 p->more_cleanups_ok = 0;
2667 /* Hash a TYPENAME_TYPE. K is really of type `tree'. */
2670 typename_hash (const void* k)
2675 hash = (htab_hash_pointer (TYPE_CONTEXT (t))
2676 ^ htab_hash_pointer (DECL_NAME (TYPE_NAME (t))));
2681 typedef struct typename_info {
2689 /* Compare two TYPENAME_TYPEs. K1 and K2 are really of type `tree'. */
2692 typename_compare (const void * k1, const void * k2)
2695 const typename_info *t2;
2698 t2 = (const typename_info *) k2;
2700 return (DECL_NAME (TYPE_NAME (t1)) == t2->name
2701 && TYPE_CONTEXT (t1) == t2->scope
2702 && TYPENAME_TYPE_FULLNAME (t1) == t2->template_id
2703 && TYPENAME_IS_ENUM_P (t1) == t2->enum_p
2704 && TYPENAME_IS_CLASS_P (t1) == t2->class_p);
2707 /* Build a TYPENAME_TYPE. If the type is `typename T::t', CONTEXT is
2708 the type of `T', NAME is the IDENTIFIER_NODE for `t'.
2710 Returns the new TYPENAME_TYPE. */
2712 static GTY ((param_is (union tree_node))) htab_t typename_htab;
2715 build_typename_type (tree context, tree name, tree fullname,
2716 enum tag_types tag_type)
2724 if (typename_htab == NULL)
2725 typename_htab = htab_create_ggc (61, &typename_hash,
2726 &typename_compare, NULL);
2728 ti.scope = FROB_CONTEXT (context);
2730 ti.template_id = fullname;
2731 ti.enum_p = tag_type == enum_type;
2732 ti.class_p = (tag_type == class_type
2733 || tag_type == record_type
2734 || tag_type == union_type);
2735 hash = (htab_hash_pointer (ti.scope)
2736 ^ htab_hash_pointer (ti.name));
2738 /* See if we already have this type. */
2739 e = htab_find_slot_with_hash (typename_htab, &ti, hash, INSERT);
2744 /* Build the TYPENAME_TYPE. */
2745 t = make_aggr_type (TYPENAME_TYPE);
2746 TYPE_CONTEXT (t) = ti.scope;
2747 TYPENAME_TYPE_FULLNAME (t) = ti.template_id;
2748 TYPENAME_IS_ENUM_P (t) = ti.enum_p;
2749 TYPENAME_IS_CLASS_P (t) = ti.class_p;
2751 /* Build the corresponding TYPE_DECL. */
2752 d = build_decl (TYPE_DECL, name, t);
2753 TYPE_NAME (TREE_TYPE (d)) = d;
2754 TYPE_STUB_DECL (TREE_TYPE (d)) = d;
2755 DECL_CONTEXT (d) = FROB_CONTEXT (context);
2756 DECL_ARTIFICIAL (d) = 1;
2758 /* Store it in the hash table. */
2765 /* Resolve `typename CONTEXT::NAME'. TAG_TYPE indicates the tag
2766 provided to name the type. Returns an appropriate type, unless an
2767 error occurs, in which case error_mark_node is returned. If we
2768 locate a non-artificial TYPE_DECL and TF_KEEP_TYPE_DECL is set, we
2769 return that, rather than the _TYPE it corresponds to, in other
2770 cases we look through the type decl. If TF_ERROR is set, complain
2771 about errors, otherwise be quiet. */
2774 make_typename_type (tree context, tree name, enum tag_types tag_type,
2775 tsubst_flags_t complain)
2779 if (name == error_mark_node
2780 || context == NULL_TREE
2781 || context == error_mark_node)
2782 return error_mark_node;
2786 if (!(TYPE_LANG_SPECIFIC (name)
2787 && (CLASSTYPE_IS_TEMPLATE (name)
2788 || CLASSTYPE_USE_TEMPLATE (name))))
2789 name = TYPE_IDENTIFIER (name);
2791 /* Create a TEMPLATE_ID_EXPR for the type. */
2792 name = build_nt (TEMPLATE_ID_EXPR,
2793 CLASSTYPE_TI_TEMPLATE (name),
2794 CLASSTYPE_TI_ARGS (name));
2796 else if (TREE_CODE (name) == TYPE_DECL)
2797 name = DECL_NAME (name);
2801 if (TREE_CODE (name) == TEMPLATE_ID_EXPR)
2803 name = TREE_OPERAND (name, 0);
2804 if (TREE_CODE (name) == TEMPLATE_DECL)
2805 name = TREE_OPERAND (fullname, 0) = DECL_NAME (name);
2807 if (TREE_CODE (name) == TEMPLATE_DECL)
2809 error ("%qD used without template parameters", name);
2810 return error_mark_node;
2812 gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE);
2813 gcc_assert (TYPE_P (context));
2815 if (!dependent_type_p (context)
2816 || currently_open_class (context))
2818 if (TREE_CODE (fullname) == TEMPLATE_ID_EXPR)
2820 tree tmpl = NULL_TREE;
2821 if (IS_AGGR_TYPE (context))
2822 tmpl = lookup_field (context, name, 0, false);
2823 if (!tmpl || !DECL_CLASS_TEMPLATE_P (tmpl))
2825 if (complain & tf_error)
2826 error ("no class template named %q#T in %q#T",
2828 return error_mark_node;
2831 if (complain & tf_error)
2832 perform_or_defer_access_check (TYPE_BINFO (context), tmpl);
2834 return lookup_template_class (tmpl,
2835 TREE_OPERAND (fullname, 1),
2837 /*entering_scope=*/0,
2838 tf_warning_or_error | tf_user);
2844 if (!IS_AGGR_TYPE (context))
2846 if (complain & tf_error)
2847 error ("no type named %q#T in %q#T", name, context);
2848 return error_mark_node;
2851 t = lookup_field (context, name, 0, true);
2854 if (TREE_CODE (t) != TYPE_DECL)
2856 if (complain & tf_error)
2857 error ("no type named %q#T in %q#T", name, context);
2858 return error_mark_node;
2861 if (complain & tf_error)
2862 perform_or_defer_access_check (TYPE_BINFO (context), t);
2864 if (DECL_ARTIFICIAL (t) || !(complain & tf_keep_type_decl))
2872 /* If the CONTEXT is not a template type, then either the field is
2873 there now or its never going to be. */
2874 if (!dependent_type_p (context))
2876 if (complain & tf_error)
2877 error ("no type named %q#T in %q#T", name, context);
2878 return error_mark_node;
2881 return build_typename_type (context, name, fullname, tag_type);
2884 /* Resolve `CONTEXT::template NAME'. Returns a TEMPLATE_DECL if the name
2885 can be resolved or an UNBOUND_CLASS_TEMPLATE, unless an error occurs,
2886 in which case error_mark_node is returned.
2888 If PARM_LIST is non-NULL, also make sure that the template parameter
2889 list of TEMPLATE_DECL matches.
2891 If COMPLAIN zero, don't complain about any errors that occur. */
2894 make_unbound_class_template (tree context, tree name, tree parm_list,
2895 tsubst_flags_t complain)
2901 name = TYPE_IDENTIFIER (name);
2902 else if (DECL_P (name))
2903 name = DECL_NAME (name);
2904 gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE);
2906 if (!dependent_type_p (context)
2907 || currently_open_class (context))
2909 tree tmpl = NULL_TREE;
2911 if (IS_AGGR_TYPE (context))
2912 tmpl = lookup_field (context, name, 0, false);
2914 if (!tmpl || !DECL_CLASS_TEMPLATE_P (tmpl))
2916 if (complain & tf_error)
2917 error ("no class template named %q#T in %q#T", name, context);
2918 return error_mark_node;
2922 && !comp_template_parms (DECL_TEMPLATE_PARMS (tmpl), parm_list))
2924 if (complain & tf_error)
2926 error ("template parameters do not match template");
2927 error ("%q+D declared here", tmpl);
2929 return error_mark_node;
2932 if (complain & tf_error)
2933 perform_or_defer_access_check (TYPE_BINFO (context), tmpl);
2938 /* Build the UNBOUND_CLASS_TEMPLATE. */
2939 t = make_aggr_type (UNBOUND_CLASS_TEMPLATE);
2940 TYPE_CONTEXT (t) = FROB_CONTEXT (context);
2941 TREE_TYPE (t) = NULL_TREE;
2943 /* Build the corresponding TEMPLATE_DECL. */
2944 d = build_decl (TEMPLATE_DECL, name, t);
2945 TYPE_NAME (TREE_TYPE (d)) = d;
2946 TYPE_STUB_DECL (TREE_TYPE (d)) = d;
2947 DECL_CONTEXT (d) = FROB_CONTEXT (context);
2948 DECL_ARTIFICIAL (d) = 1;
2949 DECL_TEMPLATE_PARMS (d) = parm_list;
2956 /* Push the declarations of builtin types into the namespace.
2957 RID_INDEX is the index of the builtin type in the array
2958 RID_POINTERS. NAME is the name used when looking up the builtin
2959 type. TYPE is the _TYPE node for the builtin type. */
2962 record_builtin_type (enum rid rid_index,
2966 tree rname = NULL_TREE, tname = NULL_TREE;
2967 tree tdecl = NULL_TREE;
2969 if ((int) rid_index < (int) RID_MAX)
2970 rname = ridpointers[(int) rid_index];
2972 tname = get_identifier (name);
2974 /* The calls to SET_IDENTIFIER_GLOBAL_VALUE below should be
2975 eliminated. Built-in types should not be looked up name; their
2976 names are keywords that the parser can recognize. However, there
2977 is code in c-common.c that uses identifier_global_value to look
2978 up built-in types by name. */
2981 tdecl = build_decl (TYPE_DECL, tname, type);
2982 DECL_ARTIFICIAL (tdecl) = 1;
2983 SET_IDENTIFIER_GLOBAL_VALUE (tname, tdecl);
2989 tdecl = build_decl (TYPE_DECL, rname, type);
2990 DECL_ARTIFICIAL (tdecl) = 1;
2992 SET_IDENTIFIER_GLOBAL_VALUE (rname, tdecl);
2995 if (!TYPE_NAME (type))
2996 TYPE_NAME (type) = tdecl;
2999 debug_hooks->type_decl (tdecl, 0);
3002 /* Record one of the standard Java types.
3003 * Declare it as having the given NAME.
3004 * If SIZE > 0, it is the size of one of the integral types;
3005 * otherwise it is the negative of the size of one of the other types. */
3008 record_builtin_java_type (const char* name, int size)
3012 type = make_signed_type (size);
3013 else if (size > -32)
3014 { /* "__java_char" or ""__java_boolean". */
3015 type = make_unsigned_type (-size);
3016 /*if (size == -1) TREE_SET_CODE (type, BOOLEAN_TYPE);*/
3019 { /* "__java_float" or ""__java_double". */
3020 type = make_node (REAL_TYPE);
3021 TYPE_PRECISION (type) = - size;
3024 record_builtin_type (RID_MAX, name, type);
3025 decl = TYPE_NAME (type);
3027 /* Suppress generate debug symbol entries for these types,
3028 since for normal C++ they are just clutter.
3029 However, push_lang_context undoes this if extern "Java" is seen. */
3030 DECL_IGNORED_P (decl) = 1;
3032 TYPE_FOR_JAVA (type) = 1;
3036 /* Push a type into the namespace so that the back-ends ignore it. */
3039 record_unknown_type (tree type, const char* name)
3041 tree decl = pushdecl (build_decl (TYPE_DECL, get_identifier (name), type));
3042 /* Make sure the "unknown type" typedecl gets ignored for debug info. */
3043 DECL_IGNORED_P (decl) = 1;
3044 TYPE_DECL_SUPPRESS_DEBUG (decl) = 1;
3045 TYPE_SIZE (type) = TYPE_SIZE (void_type_node);
3046 TYPE_ALIGN (type) = 1;
3047 TYPE_USER_ALIGN (type) = 0;
3048 TYPE_MODE (type) = TYPE_MODE (void_type_node);
3051 /* A string for which we should create an IDENTIFIER_NODE at
3054 typedef struct predefined_identifier
3056 /* The name of the identifier. */
3057 const char *const name;
3058 /* The place where the IDENTIFIER_NODE should be stored. */
3060 /* Nonzero if this is the name of a constructor or destructor. */
3061 const int ctor_or_dtor_p;
3062 } predefined_identifier;
3064 /* Create all the predefined identifiers. */
3067 initialize_predefined_identifiers (void)
3069 const predefined_identifier *pid;
3071 /* A table of identifiers to create at startup. */
3072 static const predefined_identifier predefined_identifiers[] = {
3073 { "C++", &lang_name_cplusplus, 0 },
3074 { "C", &lang_name_c, 0 },
3075 { "Java", &lang_name_java, 0 },
3076 /* Some of these names have a trailing space so that it is
3077 impossible for them to conflict with names written by users. */
3078 { "__ct ", &ctor_identifier, 1 },
3079 { "__base_ctor ", &base_ctor_identifier, 1 },
3080 { "__comp_ctor ", &complete_ctor_identifier, 1 },
3081 { "__dt ", &dtor_identifier, 1 },
3082 { "__comp_dtor ", &complete_dtor_identifier, 1 },
3083 { "__base_dtor ", &base_dtor_identifier, 1 },
3084 { "__deleting_dtor ", &deleting_dtor_identifier, 1 },
3085 { IN_CHARGE_NAME, &in_charge_identifier, 0 },
3086 { "nelts", &nelts_identifier, 0 },
3087 { THIS_NAME, &this_identifier, 0 },
3088 { VTABLE_DELTA_NAME, &delta_identifier, 0 },
3089 { VTABLE_PFN_NAME, &pfn_identifier, 0 },
3090 { "_vptr", &vptr_identifier, 0 },
3091 { "__vtt_parm", &vtt_parm_identifier, 0 },
3092 { "::", &global_scope_name, 0 },
3093 { "std", &std_identifier, 0 },
3097 for (pid = predefined_identifiers; pid->name; ++pid)
3099 *pid->node = get_identifier (pid->name);
3100 if (pid->ctor_or_dtor_p)
3101 IDENTIFIER_CTOR_OR_DTOR_P (*pid->node) = 1;
3105 /* Create the predefined scalar types of C,
3106 and some nodes representing standard constants (0, 1, (void *)0).
3107 Initialize the global binding level.
3108 Make definitions for built-in primitive functions. */
3111 cxx_init_decl_processing (void)
3114 tree void_ftype_ptr;
3116 build_common_tree_nodes (flag_signed_char, false);
3118 /* Create all the identifiers we need. */
3119 initialize_predefined_identifiers ();
3121 /* Create the global variables. */
3122 push_to_top_level ();
3124 current_function_decl = NULL_TREE;
3125 current_binding_level = NULL;
3126 /* Enter the global namespace. */
3127 gcc_assert (global_namespace == NULL_TREE);
3128 global_namespace = build_lang_decl (NAMESPACE_DECL, global_scope_name,
3130 TREE_PUBLIC (global_namespace) = 1;
3131 begin_scope (sk_namespace, global_namespace);
3133 current_lang_name = NULL_TREE;
3135 /* Adjust various flags based on command-line settings. */
3136 if (!flag_permissive)
3137 flag_pedantic_errors = 1;
3138 if (!flag_no_inline)
3140 flag_inline_trees = 1;
3143 if (flag_inline_functions)
3144 flag_inline_trees = 2;
3146 /* Force minimum function alignment if using the least significant
3147 bit of function pointers to store the virtual bit. */
3148 if (TARGET_PTRMEMFUNC_VBIT_LOCATION == ptrmemfunc_vbit_in_pfn
3149 && force_align_functions_log < 1)
3150 force_align_functions_log = 1;
3153 current_lang_name = lang_name_c;
3155 /* Create the `std' namespace. */
3156 push_namespace (std_identifier);
3157 std_node = current_namespace;
3160 c_common_nodes_and_builtins ();
3162 java_byte_type_node = record_builtin_java_type ("__java_byte", 8);
3163 java_short_type_node = record_builtin_java_type ("__java_short", 16);
3164 java_int_type_node = record_builtin_java_type ("__java_int", 32);
3165 java_long_type_node = record_builtin_java_type ("__java_long", 64);
3166 java_float_type_node = record_builtin_java_type ("__java_float", -32);
3167 java_double_type_node = record_builtin_java_type ("__java_double", -64);
3168 java_char_type_node = record_builtin_java_type ("__java_char", -16);
3169 java_boolean_type_node = record_builtin_java_type ("__java_boolean", -1);
3171 integer_two_node = build_int_cst (NULL_TREE, 2);
3172 integer_three_node = build_int_cst (NULL_TREE, 3);
3174 record_builtin_type (RID_BOOL, "bool", boolean_type_node);
3175 truthvalue_type_node = boolean_type_node;
3176 truthvalue_false_node = boolean_false_node;
3177 truthvalue_true_node = boolean_true_node;
3179 empty_except_spec = build_tree_list (NULL_TREE, NULL_TREE);
3182 record_builtin_type (RID_MAX, NULL, string_type_node);
3185 delta_type_node = ptrdiff_type_node;
3186 vtable_index_type = ptrdiff_type_node;
3188 vtt_parm_type = build_pointer_type (const_ptr_type_node);
3189 void_ftype = build_function_type (void_type_node, void_list_node);
3190 void_ftype_ptr = build_function_type (void_type_node,
3191 tree_cons (NULL_TREE,
3195 = build_exception_variant (void_ftype_ptr, empty_except_spec);
3197 /* C++ extensions */
3199 unknown_type_node = make_node (UNKNOWN_TYPE);
3200 record_unknown_type (unknown_type_node, "unknown type");
3202 /* Indirecting an UNKNOWN_TYPE node yields an UNKNOWN_TYPE node. */
3203 TREE_TYPE (unknown_type_node) = unknown_type_node;
3205 /* Looking up TYPE_POINTER_TO and TYPE_REFERENCE_TO yield the same
3207 TYPE_POINTER_TO (unknown_type_node) = unknown_type_node;
3208 TYPE_REFERENCE_TO (unknown_type_node) = unknown_type_node;
3211 /* Make sure we get a unique function type, so we can give
3212 its pointer type a name. (This wins for gdb.) */
3213 tree vfunc_type = make_node (FUNCTION_TYPE);
3214 TREE_TYPE (vfunc_type) = integer_type_node;
3215 TYPE_ARG_TYPES (vfunc_type) = NULL_TREE;
3216 layout_type (vfunc_type);
3218 vtable_entry_type = build_pointer_type (vfunc_type);
3220 record_builtin_type (RID_MAX, VTBL_PTR_TYPE, vtable_entry_type);
3223 = build_cplus_array_type (vtable_entry_type, NULL_TREE);
3224 layout_type (vtbl_type_node);
3225 vtbl_type_node = build_qualified_type (vtbl_type_node, TYPE_QUAL_CONST);
3226 record_builtin_type (RID_MAX, NULL, vtbl_type_node);
3227 vtbl_ptr_type_node = build_pointer_type (vtable_entry_type);
3228 layout_type (vtbl_ptr_type_node);
3229 record_builtin_type (RID_MAX, NULL, vtbl_ptr_type_node);
3231 push_namespace (get_identifier ("__cxxabiv1"));
3232 abi_node = current_namespace;
3235 global_type_node = make_node (LANG_TYPE);
3236 record_unknown_type (global_type_node, "global type");
3239 current_lang_name = lang_name_cplusplus;
3243 tree bad_alloc_type_node;
3244 tree bad_alloc_decl;
3245 tree newtype, deltype;
3246 tree ptr_ftype_sizetype;
3248 push_namespace (std_identifier);
3249 bad_alloc_id = get_identifier ("bad_alloc");
3250 bad_alloc_type_node = make_aggr_type (RECORD_TYPE);
3251 TYPE_CONTEXT (bad_alloc_type_node) = current_namespace;
3253 = create_implicit_typedef (bad_alloc_id, bad_alloc_type_node);
3254 DECL_CONTEXT (bad_alloc_decl) = current_namespace;
3255 TYPE_STUB_DECL (bad_alloc_type_node) = bad_alloc_decl;
3259 = build_function_type (ptr_type_node,
3260 tree_cons (NULL_TREE,
3263 newtype = build_exception_variant
3264 (ptr_ftype_sizetype, add_exception_specifier
3265 (NULL_TREE, bad_alloc_type_node, -1));
3266 deltype = build_exception_variant (void_ftype_ptr, empty_except_spec);
3267 push_cp_library_fn (NEW_EXPR, newtype);
3268 push_cp_library_fn (VEC_NEW_EXPR, newtype);
3269 global_delete_fndecl = push_cp_library_fn (DELETE_EXPR, deltype);
3270 push_cp_library_fn (VEC_DELETE_EXPR, deltype);
3274 = build_library_fn_ptr ("__cxa_pure_virtual", void_ftype);
3276 /* Perform other language dependent initializations. */
3277 init_class_processing ();
3278 init_rtti_processing ();
3280 if (flag_exceptions)
3281 init_exception_processing ();
3283 if (! supports_one_only ())
3286 make_fname_decl = cp_make_fname_decl;
3287 start_fname_decls ();
3289 /* Show we use EH for cleanups. */
3290 if (flag_exceptions)
3291 using_eh_for_cleanups ();
3294 /* Generate an initializer for a function naming variable from
3295 NAME. NAME may be NULL, to indicate a dependent name. TYPE_P is
3296 filled in with the type of the init. */
3299 cp_fname_init (const char* name, tree *type_p)
3301 tree domain = NULL_TREE;
3303 tree init = NULL_TREE;
3308 length = strlen (name);
3309 domain = build_index_type (size_int (length));
3310 init = build_string (length + 1, name);
3313 type = build_qualified_type (char_type_node, TYPE_QUAL_CONST);
3314 type = build_cplus_array_type (type, domain);
3319 TREE_TYPE (init) = type;
3321 init = error_mark_node;
3326 /* Create the VAR_DECL for __FUNCTION__ etc. ID is the name to give the
3327 decl, NAME is the initialization string and TYPE_DEP indicates whether
3328 NAME depended on the type of the function. We make use of that to detect
3329 __PRETTY_FUNCTION__ inside a template fn. This is being done
3330 lazily at the point of first use, so we mustn't push the decl now. */
3333 cp_make_fname_decl (tree id, int type_dep)
3335 const char *const name = (type_dep && processing_template_decl
3336 ? NULL : fname_as_string (type_dep));
3338 tree init = cp_fname_init (name, &type);
3339 tree decl = build_decl (VAR_DECL, id, type);
3342 free ((char *) name);
3344 /* As we're using pushdecl_with_scope, we must set the context. */
3345 DECL_CONTEXT (decl) = current_function_decl;
3346 DECL_PRETTY_FUNCTION_P (decl) = type_dep;
3348 TREE_STATIC (decl) = 1;
3349 TREE_READONLY (decl) = 1;
3350 DECL_ARTIFICIAL (decl) = 1;
3352 TREE_USED (decl) = 1;
3354 if (current_function_decl)
3356 struct cp_binding_level *b = current_binding_level;
3357 while (b->level_chain->kind != sk_function_parms)
3359 pushdecl_with_scope (decl, b, /*is_friend=*/false);
3360 cp_finish_decl (decl, init, /*init_const_expr_p=*/false, NULL_TREE,
3361 LOOKUP_ONLYCONVERTING);
3364 pushdecl_top_level_and_finish (decl, init);
3369 /* Make a definition for a builtin function named NAME in the current
3370 namespace, whose data type is TYPE and whose context is CONTEXT.
3371 TYPE should be a function type with argument types.
3373 CLASS and CODE tell later passes how to compile calls to this function.
3374 See tree.h for possible values.
3376 If LIBNAME is nonzero, use that for DECL_ASSEMBLER_NAME,
3377 the name to be called if we can't opencode the function.
3378 If ATTRS is nonzero, use that for the function's attribute
3382 builtin_function_1 (const char* name,
3385 enum built_in_function code,
3386 enum built_in_class class,
3387 const char* libname,
3390 tree decl = build_library_fn_1 (get_identifier (name), ERROR_MARK, type);
3391 DECL_BUILT_IN_CLASS (decl) = class;
3392 DECL_FUNCTION_CODE (decl) = code;
3393 DECL_CONTEXT (decl) = context;
3397 /* Since `pushdecl' relies on DECL_ASSEMBLER_NAME instead of DECL_NAME,
3398 we cannot change DECL_ASSEMBLER_NAME until we have installed this
3399 function in the namespace. */
3401 SET_DECL_ASSEMBLER_NAME (decl, get_identifier (libname));
3403 /* A function in the user's namespace should have an explicit
3404 declaration before it is used. Mark the built-in function as
3405 anticipated but not actually declared. */
3406 if (name[0] != '_' || name[1] != '_')
3407 DECL_ANTICIPATED (decl) = 1;
3409 /* Possibly apply some default attributes to this built-in function. */
3411 decl_attributes (&decl, attrs, ATTR_FLAG_BUILT_IN);
3413 decl_attributes (&decl, NULL_TREE, 0);
3418 /* Entry point for the benefit of c_common_nodes_and_builtins.
3420 Make a definition for a builtin function named NAME and whose data type
3421 is TYPE. TYPE should be a function type with argument types. This
3422 function places the anticipated declaration in the global namespace
3423 and additionally in the std namespace if appropriate.
3425 CLASS and CODE tell later passes how to compile calls to this function.
3426 See tree.h for possible values.
3428 If LIBNAME is nonzero, use that for DECL_ASSEMBLER_NAME,
3429 the name to be called if we can't opencode the function.
3431 If ATTRS is nonzero, use that for the function's attribute
3435 builtin_function (const char* name,
3438 enum built_in_class cl,
3439 const char* libname,
3442 /* All builtins that don't begin with an '_' should additionally
3443 go in the 'std' namespace. */
3446 push_namespace (std_identifier);
3447 builtin_function_1 (name, type, std_node, code, cl, libname, attrs);
3451 return builtin_function_1 (name, type, NULL_TREE, code,
3452 cl, libname, attrs);
3455 /* Generate a FUNCTION_DECL with the typical flags for a runtime library
3456 function. Not called directly. */
3459 build_library_fn_1 (tree name, enum tree_code operator_code, tree type)
3461 tree fn = build_lang_decl (FUNCTION_DECL, name, type);
3462 DECL_EXTERNAL (fn) = 1;
3463 TREE_PUBLIC (fn) = 1;
3464 DECL_ARTIFICIAL (fn) = 1;
3465 SET_OVERLOADED_OPERATOR_CODE (fn, operator_code);
3466 SET_DECL_LANGUAGE (fn, lang_c);
3467 /* Runtime library routines are, by definition, available in an
3468 external shared object. */
3469 DECL_VISIBILITY (fn) = VISIBILITY_DEFAULT;
3470 DECL_VISIBILITY_SPECIFIED (fn) = 1;
3474 /* Returns the _DECL for a library function with C linkage.
3475 We assume that such functions never throw; if this is incorrect,
3476 callers should unset TREE_NOTHROW. */
3479 build_library_fn (tree name, tree type)
3481 tree fn = build_library_fn_1 (name, ERROR_MARK, type);
3482 TREE_NOTHROW (fn) = 1;
3486 /* Returns the _DECL for a library function with C++ linkage. */
3489 build_cp_library_fn (tree name, enum tree_code operator_code, tree type)
3491 tree fn = build_library_fn_1 (name, operator_code, type);
3492 TREE_NOTHROW (fn) = TYPE_NOTHROW_P (type);
3493 DECL_CONTEXT (fn) = FROB_CONTEXT (current_namespace);
3494 SET_DECL_LANGUAGE (fn, lang_cplusplus);
3498 /* Like build_library_fn, but takes a C string instead of an
3502 build_library_fn_ptr (const char* name, tree type)
3504 return build_library_fn (get_identifier (name), type);
3507 /* Like build_cp_library_fn, but takes a C string instead of an
3511 build_cp_library_fn_ptr (const char* name, tree type)
3513 return build_cp_library_fn (get_identifier (name), ERROR_MARK, type);
3516 /* Like build_library_fn, but also pushes the function so that we will
3517 be able to find it via IDENTIFIER_GLOBAL_VALUE. */
3520 push_library_fn (tree name, tree type)
3522 tree fn = build_library_fn (name, type);
3523 pushdecl_top_level (fn);
3527 /* Like build_cp_library_fn, but also pushes the function so that it
3528 will be found by normal lookup. */
3531 push_cp_library_fn (enum tree_code operator_code, tree type)
3533 tree fn = build_cp_library_fn (ansi_opname (operator_code),
3540 /* Like push_library_fn, but takes a TREE_LIST of parm types rather than
3544 push_void_library_fn (tree name, tree parmtypes)
3546 tree type = build_function_type (void_type_node, parmtypes);
3547 return push_library_fn (name, type);
3550 /* Like push_library_fn, but also note that this function throws
3551 and does not return. Used for __throw_foo and the like. */
3554 push_throw_library_fn (tree name, tree type)
3556 tree fn = push_library_fn (name, type);
3557 TREE_THIS_VOLATILE (fn) = 1;
3558 TREE_NOTHROW (fn) = 0;
3562 /* When we call finish_struct for an anonymous union, we create
3563 default copy constructors and such. But, an anonymous union
3564 shouldn't have such things; this function undoes the damage to the
3565 anonymous union type T.
3567 (The reason that we create the synthesized methods is that we don't
3568 distinguish `union { int i; }' from `typedef union { int i; } U'.
3569 The first is an anonymous union; the second is just an ordinary
3573 fixup_anonymous_aggr (tree t)
3577 /* Wipe out memory of synthesized methods. */
3578 TYPE_HAS_CONSTRUCTOR (t) = 0;
3579 TYPE_HAS_DEFAULT_CONSTRUCTOR (t) = 0;
3580 TYPE_HAS_INIT_REF (t) = 0;
3581 TYPE_HAS_CONST_INIT_REF (t) = 0;
3582 TYPE_HAS_ASSIGN_REF (t) = 0;
3583 TYPE_HAS_CONST_ASSIGN_REF (t) = 0;
3585 /* Splice the implicitly generated functions out of the TYPE_METHODS
3587 q = &TYPE_METHODS (t);
3590 if (DECL_ARTIFICIAL (*q))
3591 *q = TREE_CHAIN (*q);
3593 q = &TREE_CHAIN (*q);
3596 /* ISO C++ 9.5.3. Anonymous unions may not have function members. */
3597 if (TYPE_METHODS (t))
3598 error ("%Jan anonymous union cannot have function members",
3599 TYPE_MAIN_DECL (t));
3601 /* Anonymous aggregates cannot have fields with ctors, dtors or complex
3602 assignment operators (because they cannot have these methods themselves).
3603 For anonymous unions this is already checked because they are not allowed
3604 in any union, otherwise we have to check it. */
3605 if (TREE_CODE (t) != UNION_TYPE)
3609 for (field = TYPE_FIELDS (t); field; field = TREE_CHAIN (field))
3610 if (TREE_CODE (field) == FIELD_DECL)
3612 type = TREE_TYPE (field);
3613 if (CLASS_TYPE_P (type))
3615 if (TYPE_NEEDS_CONSTRUCTING (type))
3616 error ("member %q+#D with constructor not allowed "
3617 "in anonymous aggregate", field);
3618 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type))
3619 error ("member %q+#D with destructor not allowed "
3620 "in anonymous aggregate", field);
3621 if (TYPE_HAS_COMPLEX_ASSIGN_REF (type))
3622 error ("member %q+#D with copy assignment operator "
3623 "not allowed in anonymous aggregate", field);
3629 /* Make sure that a declaration with no declarator is well-formed, i.e.
3630 just declares a tagged type or anonymous union.
3632 Returns the type declared; or NULL_TREE if none. */
3635 check_tag_decl (cp_decl_specifier_seq *declspecs)
3637 int saw_friend = declspecs->specs[(int)ds_friend] != 0;
3638 int saw_typedef = declspecs->specs[(int)ds_typedef] != 0;
3639 /* If a class, struct, or enum type is declared by the DECLSPECS
3640 (i.e, if a class-specifier, enum-specifier, or non-typename
3641 elaborated-type-specifier appears in the DECLSPECS),
3642 DECLARED_TYPE is set to the corresponding type. */
3643 tree declared_type = NULL_TREE;
3644 bool error_p = false;
3646 if (declspecs->multiple_types_p)
3647 error ("multiple types in one declaration");
3648 else if (declspecs->redefined_builtin_type)
3650 if (!in_system_header)
3651 pedwarn ("redeclaration of C++ built-in type %qT",
3652 declspecs->redefined_builtin_type);
3657 && TYPE_P (declspecs->type)
3658 && ((TREE_CODE (declspecs->type) != TYPENAME_TYPE
3659 && IS_AGGR_TYPE (declspecs->type))
3660 || TREE_CODE (declspecs->type) == ENUMERAL_TYPE))
3661 declared_type = declspecs->type;
3662 else if (declspecs->type == error_mark_node)
3664 if (declared_type == NULL_TREE && ! saw_friend && !error_p)
3665 pedwarn ("declaration does not declare anything");
3666 /* Check for an anonymous union. */
3667 else if (declared_type && IS_AGGR_TYPE_CODE (TREE_CODE (declared_type))
3668 && TYPE_ANONYMOUS_P (declared_type))
3670 /* 7/3 In a simple-declaration, the optional init-declarator-list
3671 can be omitted only when declaring a class (clause 9) or
3672 enumeration (7.2), that is, when the decl-specifier-seq contains
3673 either a class-specifier, an elaborated-type-specifier with
3674 a class-key (9.1), or an enum-specifier. In these cases and
3675 whenever a class-specifier or enum-specifier is present in the
3676 decl-specifier-seq, the identifiers in these specifiers are among
3677 the names being declared by the declaration (as class-name,
3678 enum-names, or enumerators, depending on the syntax). In such
3679 cases, and except for the declaration of an unnamed bit-field (9.6),
3680 the decl-specifier-seq shall introduce one or more names into the
3681 program, or shall redeclare a name introduced by a previous
3682 declaration. [Example:
3683 enum { }; // ill-formed
3684 typedef class { }; // ill-formed
3688 error ("missing type-name in typedef-declaration");
3691 /* Anonymous unions are objects, so they can have specifiers. */;
3692 SET_ANON_AGGR_TYPE_P (declared_type);
3694 if (TREE_CODE (declared_type) != UNION_TYPE && pedantic
3695 && !in_system_header)
3696 pedwarn ("ISO C++ prohibits anonymous structs");
3701 if (declspecs->specs[(int)ds_inline]
3702 || declspecs->specs[(int)ds_virtual])
3703 error ("%qs can only be specified for functions",
3704 declspecs->specs[(int)ds_inline]
3705 ? "inline" : "virtual");
3707 && (!current_class_type
3708 || current_scope () != current_class_type))
3709 error ("%<friend%> can only be specified inside a class");
3710 else if (declspecs->specs[(int)ds_explicit])
3711 error ("%<explicit%> can only be specified for constructors");
3712 else if (declspecs->storage_class)
3713 error ("a storage class can only be specified for objects "
3715 else if (declspecs->specs[(int)ds_const]
3716 || declspecs->specs[(int)ds_volatile]
3717 || declspecs->specs[(int)ds_restrict]
3718 || declspecs->specs[(int)ds_thread])
3719 error ("qualifiers can only be specified for objects "
3723 return declared_type;
3726 /* Called when a declaration is seen that contains no names to declare.
3727 If its type is a reference to a structure, union or enum inherited
3728 from a containing scope, shadow that tag name for the current scope
3729 with a forward reference.
3730 If its type defines a new named structure or union
3731 or defines an enum, it is valid but we need not do anything here.
3732 Otherwise, it is an error.
3734 C++: may have to grok the declspecs to learn about static,
3735 complain for anonymous unions.
3737 Returns the TYPE declared -- or NULL_TREE if none. */
3740 shadow_tag (cp_decl_specifier_seq *declspecs)
3742 tree t = check_tag_decl (declspecs);
3747 if (declspecs->attributes)
3749 warning (0, "attribute ignored in declaration of %q+#T", t);
3750 warning (0, "attribute for %q+#T must follow the %qs keyword",
3751 t, class_key_or_enum_as_string (t));
3755 maybe_process_partial_specialization (t);
3757 /* This is where the variables in an anonymous union are
3758 declared. An anonymous union declaration looks like:
3760 because there is no declarator after the union, the parser
3761 sends that declaration here. */
3762 if (ANON_AGGR_TYPE_P (t))
3764 fixup_anonymous_aggr (t);
3766 if (TYPE_FIELDS (t))
3768 tree decl = grokdeclarator (/*declarator=*/NULL,
3769 declspecs, NORMAL, 0, NULL);
3770 finish_anon_union (decl);
3777 /* Decode a "typename", such as "int **", returning a ..._TYPE node. */
3780 groktypename (cp_decl_specifier_seq *type_specifiers,
3781 const cp_declarator *declarator)
3785 attrs = type_specifiers->attributes;
3786 type_specifiers->attributes = NULL_TREE;
3787 type = grokdeclarator (declarator, type_specifiers, TYPENAME, 0, &attrs);
3789 cplus_decl_attributes (&type, attrs, 0);
3793 /* Decode a declarator in an ordinary declaration or data definition.
3794 This is called as soon as the type information and variable name
3795 have been parsed, before parsing the initializer if any.
3796 Here we create the ..._DECL node, fill in its type,
3797 and put it on the list of decls for the current context.
3798 The ..._DECL node is returned as the value.
3800 Exception: for arrays where the length is not specified,
3801 the type is left null, to be filled in by `cp_finish_decl'.
3803 Function definitions do not come here; they go to start_function
3804 instead. However, external and forward declarations of functions
3805 do go through here. Structure field declarations are done by
3806 grokfield and not through here. */
3809 start_decl (const cp_declarator *declarator,
3810 cp_decl_specifier_seq *declspecs,
3813 tree prefix_attributes,
3814 tree *pushed_scope_p)
3820 *pushed_scope_p = NULL_TREE;
3822 /* An object declared as __attribute__((deprecated)) suppresses
3823 warnings of uses of other deprecated items. */
3824 if (lookup_attribute ("deprecated", attributes))
3825 deprecated_state = DEPRECATED_SUPPRESS;
3827 attributes = chainon (attributes, prefix_attributes);
3829 decl = grokdeclarator (declarator, declspecs, NORMAL, initialized,
3832 deprecated_state = DEPRECATED_NORMAL;
3834 if (decl == NULL_TREE || TREE_CODE (decl) == VOID_TYPE
3835 || decl == error_mark_node)
3836 return error_mark_node;
3838 type = TREE_TYPE (decl);
3840 context = DECL_CONTEXT (decl);
3844 *pushed_scope_p = push_scope (context);
3846 /* We are only interested in class contexts, later. */
3847 if (TREE_CODE (context) == NAMESPACE_DECL)
3848 context = NULL_TREE;
3852 /* Is it valid for this decl to have an initializer at all?
3853 If not, set INITIALIZED to zero, which will indirectly
3854 tell `cp_finish_decl' to ignore the initializer once it is parsed. */
3855 switch (TREE_CODE (decl))
3858 error ("typedef %qD is initialized (use __typeof__ instead)", decl);
3863 error ("function %q#D is initialized like a variable", decl);
3873 if (! toplevel_bindings_p ()
3874 && DECL_EXTERNAL (decl))
3875 warning (0, "declaration of %q#D has %<extern%> and is initialized",
3877 DECL_EXTERNAL (decl) = 0;
3878 if (toplevel_bindings_p ())
3879 TREE_STATIC (decl) = 1;
3882 /* Set attributes here so if duplicate decl, will have proper attributes. */
3883 cplus_decl_attributes (&decl, attributes, 0);
3885 /* Dllimported symbols cannot be defined. Static data members (which
3886 can be initialized in-class and dllimported) go through grokfield,
3887 not here, so we don't need to exclude those decls when checking for
3889 if (initialized && DECL_DLLIMPORT_P (decl))
3891 error ("definition of %q#D is marked %<dllimport%>", decl);
3892 DECL_DLLIMPORT_P (decl) = 0;
3895 /* If #pragma weak was used, mark the decl weak now. */
3896 maybe_apply_pragma_weak (decl);
3898 if (TREE_CODE (decl) == FUNCTION_DECL
3899 && DECL_DECLARED_INLINE_P (decl)
3900 && DECL_UNINLINABLE (decl)
3901 && lookup_attribute ("noinline", DECL_ATTRIBUTES (decl)))
3902 warning (0, "inline function %q+D given attribute noinline", decl);
3904 if (context && COMPLETE_TYPE_P (complete_type (context)))
3906 if (TREE_CODE (decl) == VAR_DECL)
3908 tree field = lookup_field (context, DECL_NAME (decl), 0, false);
3909 if (field == NULL_TREE || TREE_CODE (field) != VAR_DECL)
3910 error ("%q#D is not a static member of %q#T", decl, context);
3913 if (DECL_CONTEXT (field) != context)
3915 if (!same_type_p (DECL_CONTEXT (field), context))
3916 pedwarn ("ISO C++ does not permit %<%T::%D%> "
3917 "to be defined as %<%T::%D%>",
3918 DECL_CONTEXT (field), DECL_NAME (decl),
3919 context, DECL_NAME (decl));
3920 DECL_CONTEXT (decl) = DECL_CONTEXT (field);
3922 if (processing_specialization
3923 && template_class_depth (context) == 0
3924 && CLASSTYPE_TEMPLATE_SPECIALIZATION (context))
3925 error ("template header not allowed in member definition "
3926 "of explicitly specialized class");
3927 /* Static data member are tricky; an in-class initialization
3928 still doesn't provide a definition, so the in-class
3929 declaration will have DECL_EXTERNAL set, but will have an
3930 initialization. Thus, duplicate_decls won't warn
3931 about this situation, and so we check here. */
3932 if (initialized && DECL_INITIALIZED_IN_CLASS_P (field))
3933 error ("duplicate initialization of %qD", decl);
3934 if (duplicate_decls (decl, field, /*newdecl_is_friend=*/false))
3940 tree field = check_classfn (context, decl,
3941 (processing_template_decl
3942 > template_class_depth (context))
3943 ? current_template_parms
3945 if (field && duplicate_decls (decl, field,
3946 /*newdecl_is_friend=*/false))
3950 /* cp_finish_decl sets DECL_EXTERNAL if DECL_IN_AGGR_P is set. */
3951 DECL_IN_AGGR_P (decl) = 0;
3952 /* Do not mark DECL as an explicit specialization if it was not
3953 already marked as an instantiation; a declaration should
3954 never be marked as a specialization unless we know what
3955 template is being specialized. */
3956 if (DECL_LANG_SPECIFIC (decl) && DECL_USE_TEMPLATE (decl))
3958 SET_DECL_TEMPLATE_SPECIALIZATION (decl);
3960 /* [temp.expl.spec] An explicit specialization of a static data
3961 member of a template is a definition if the declaration
3962 includes an initializer; otherwise, it is a declaration.
3964 We check for processing_specialization so this only applies
3965 to the new specialization syntax. */
3966 if (!initialized && processing_specialization)
3967 DECL_EXTERNAL (decl) = 1;
3970 if (DECL_EXTERNAL (decl) && ! DECL_TEMPLATE_SPECIALIZATION (decl))
3971 pedwarn ("declaration of %q#D outside of class is not definition",
3975 /* Enter this declaration into the symbol table. */
3976 tem = maybe_push_decl (decl);
3978 if (processing_template_decl)
3979 tem = push_template_decl (tem);
3980 if (tem == error_mark_node)
3981 return error_mark_node;
3983 /* Tell the back-end to use or not use .common as appropriate. If we say
3984 -fconserve-space, we want this to save .data space, at the expense of
3985 wrong semantics. If we say -fno-conserve-space, we want this to
3986 produce errors about redefs; to do this we force variables into the
3988 if (flag_conserve_space
3989 && TREE_CODE (tem) == VAR_DECL
3990 && TREE_PUBLIC (tem)
3991 && !DECL_THREAD_LOCAL_P (tem)
3992 && !have_global_bss_p ())
3993 DECL_COMMON (tem) = 1;
3995 if (!processing_template_decl && TREE_CODE (tem) == VAR_DECL)
3996 start_decl_1 (tem, initialized);
4002 start_decl_1 (tree decl, bool initialized)
4006 gcc_assert (!processing_template_decl);
4008 if (error_operand_p (decl))
4011 gcc_assert (TREE_CODE (decl) == VAR_DECL);
4012 type = TREE_TYPE (decl);
4015 /* Is it valid for this decl to have an initializer at all?
4016 If not, set INITIALIZED to zero, which will indirectly
4017 tell `cp_finish_decl' to ignore the initializer once it is parsed. */
4019 /* Don't allow initializations for incomplete types except for
4020 arrays which might be completed by the initialization. */
4021 if (COMPLETE_TYPE_P (complete_type (type)))
4022 ; /* A complete type is ok. */
4023 else if (TREE_CODE (type) != ARRAY_TYPE)
4025 error ("variable %q#D has initializer but incomplete type", decl);
4027 type = TREE_TYPE (decl) = error_mark_node;
4029 else if (!COMPLETE_TYPE_P (complete_type (TREE_TYPE (type))))
4031 if (DECL_LANG_SPECIFIC (decl) && DECL_TEMPLATE_INFO (decl))
4032 error ("elements of array %q#D have incomplete type", decl);
4033 /* else we already gave an error in start_decl. */
4037 else if (IS_AGGR_TYPE (type)
4038 && ! DECL_EXTERNAL (decl))
4040 if (!COMPLETE_TYPE_P (complete_type (type)))
4042 error ("aggregate %q#D has incomplete type and cannot be defined",
4044 /* Change the type so that assemble_variable will give
4045 DECL an rtl we can live with: (mem (const_int 0)). */
4046 type = TREE_TYPE (decl) = error_mark_node;
4050 /* If any base type in the hierarchy of TYPE needs a constructor,
4051 then we set initialized to 1. This way any nodes which are
4052 created for the purposes of initializing this aggregate
4053 will live as long as it does. This is necessary for global
4054 aggregates which do not have their initializers processed until
4055 the end of the file. */
4056 initialized = TYPE_NEEDS_CONSTRUCTING (type);
4060 /* Create a new scope to hold this declaration if necessary.
4061 Whether or not a new scope is necessary cannot be determined
4062 until after the type has been completed; if the type is a
4063 specialization of a class template it is not until after
4064 instantiation has occurred that TYPE_HAS_NONTRIVIAL_DESTRUCTOR
4065 will be set correctly. */
4066 maybe_push_cleanup_level (type);
4069 /* Handle initialization of references. DECL, TYPE, and INIT have the
4070 same meaning as in cp_finish_decl. *CLEANUP must be NULL on entry,
4071 but will be set to a new CLEANUP_STMT if a temporary is created
4072 that must be destroyed subsequently.
4074 Returns an initializer expression to use to initialize DECL, or
4075 NULL if the initialization can be performed statically.
4077 Quotes on semantics can be found in ARM 8.4.3. */
4080 grok_reference_init (tree decl, tree type, tree init, tree *cleanup)
4084 if (init == NULL_TREE)
4086 if ((DECL_LANG_SPECIFIC (decl) == 0
4087 || DECL_IN_AGGR_P (decl) == 0)
4088 && ! DECL_THIS_EXTERN (decl))
4089 error ("%qD declared as reference but not initialized", decl);
4093 if (TREE_CODE (init) == CONSTRUCTOR)
4095 error ("ISO C++ forbids use of initializer list to "
4096 "initialize reference %qD", decl);
4100 if (TREE_CODE (init) == TREE_LIST)
4101 init = build_x_compound_expr_from_list (init, "initializer");
4103 if (TREE_CODE (TREE_TYPE (type)) != ARRAY_TYPE
4104 && TREE_CODE (TREE_TYPE (init)) == ARRAY_TYPE)
4105 /* Note: default conversion is only called in very special cases. */
4106 init = decay_conversion (init);
4108 /* Convert INIT to the reference type TYPE. This may involve the
4109 creation of a temporary, whose lifetime must be the same as that
4110 of the reference. If so, a DECL_EXPR for the temporary will be
4111 added just after the DECL_EXPR for DECL. That's why we don't set
4112 DECL_INITIAL for local references (instead assigning to them
4113 explicitly); we need to allow the temporary to be initialized
4115 tmp = initialize_reference (type, init, decl, cleanup);
4117 if (tmp == error_mark_node)
4119 else if (tmp == NULL_TREE)
4121 error ("cannot initialize %qT from %qT", type, TREE_TYPE (init));
4125 if (TREE_STATIC (decl) && !TREE_CONSTANT (tmp))
4128 DECL_INITIAL (decl) = tmp;
4133 /* When parsing `int a[] = {1, 2};' we don't know the size of the
4134 array until we finish parsing the initializer. If that's the
4135 situation we're in, update DECL accordingly. */
4138 maybe_deduce_size_from_array_init (tree decl, tree init)
4140 tree type = TREE_TYPE (decl);
4142 if (TREE_CODE (type) == ARRAY_TYPE
4143 && TYPE_DOMAIN (type) == NULL_TREE
4144 && TREE_CODE (decl) != TYPE_DECL)
4146 /* do_default is really a C-ism to deal with tentative definitions.
4147 But let's leave it here to ease the eventual merge. */
4148 int do_default = !DECL_EXTERNAL (decl);
4149 tree initializer = init ? init : DECL_INITIAL (decl);
4150 int failure = cp_complete_array_type (&TREE_TYPE (decl), initializer,
4155 error ("initializer fails to determine size of %qD", decl);
4156 TREE_TYPE (decl) = error_mark_node;
4158 else if (failure == 2)
4162 error ("array size missing in %qD", decl);
4163 TREE_TYPE (decl) = error_mark_node;
4165 /* If a `static' var's size isn't known, make it extern as
4166 well as static, so it does not get allocated. If it's not
4167 `static', then don't mark it extern; finish_incomplete_decl
4168 will give it a default size and it will get allocated. */
4169 else if (!pedantic && TREE_STATIC (decl) && !TREE_PUBLIC (decl))
4170 DECL_EXTERNAL (decl) = 1;
4172 else if (failure == 3)
4174 error ("zero-size array %qD", decl);
4175 TREE_TYPE (decl) = error_mark_node;
4178 cp_apply_type_quals_to_decl (cp_type_quals (TREE_TYPE (decl)), decl);
4180 layout_decl (decl, 0);
4184 /* Set DECL_SIZE, DECL_ALIGN, etc. for DECL (a VAR_DECL), and issue
4185 any appropriate error messages regarding the layout. */
4188 layout_var_decl (tree decl)
4192 if (TREE_STATIC (decl)
4193 && !DECL_ARTIFICIAL (decl)
4194 && current_function_decl
4195 && DECL_CONTEXT (decl) == current_function_decl)
4196 push_local_name (decl);
4198 type = TREE_TYPE (decl);
4199 if (type == error_mark_node)
4202 /* If we haven't already layed out this declaration, do so now.
4203 Note that we must not call complete type for an external object
4204 because it's type might involve templates that we are not
4205 supposed to instantiate yet. (And it's perfectly valid to say
4206 `extern X x' for some incomplete type `X'.) */
4207 if (!DECL_EXTERNAL (decl))
4208 complete_type (type);
4209 if (!DECL_SIZE (decl)
4210 && TREE_TYPE (decl) != error_mark_node
4211 && (COMPLETE_TYPE_P (type)
4212 || (TREE_CODE (type) == ARRAY_TYPE
4213 && !TYPE_DOMAIN (type)
4214 && COMPLETE_TYPE_P (TREE_TYPE (type)))))
4215 layout_decl (decl, 0);
4217 if (!DECL_EXTERNAL (decl) && DECL_SIZE (decl) == NULL_TREE)
4219 /* An automatic variable with an incomplete type: that is an error.
4220 Don't talk about array types here, since we took care of that
4221 message in grokdeclarator. */
4222 error ("storage size of %qD isn't known", decl);
4223 TREE_TYPE (decl) = error_mark_node;
4226 /* Keep this code around in case we later want to control debug info
4227 based on whether a type is "used". (jason 1999-11-11) */
4229 else if (!DECL_EXTERNAL (decl) && IS_AGGR_TYPE (ttype))
4230 /* Let debugger know it should output info for this type. */
4231 note_debug_info_needed (ttype);
4233 if (TREE_STATIC (decl) && DECL_CLASS_SCOPE_P (decl))
4234 note_debug_info_needed (DECL_CONTEXT (decl));
4237 if ((DECL_EXTERNAL (decl) || TREE_STATIC (decl))
4238 && DECL_SIZE (decl) != NULL_TREE
4239 && ! TREE_CONSTANT (DECL_SIZE (decl)))
4241 if (TREE_CODE (DECL_SIZE (decl)) == INTEGER_CST)
4242 constant_expression_warning (DECL_SIZE (decl));
4244 error ("storage size of %qD isn't constant", decl);
4248 /* If a local static variable is declared in an inline function, or if
4249 we have a weak definition, we must endeavor to create only one
4250 instance of the variable at link-time. */
4253 maybe_commonize_var (tree decl)
4255 /* Static data in a function with comdat linkage also has comdat
4257 if (TREE_STATIC (decl)
4258 /* Don't mess with __FUNCTION__. */
4259 && ! DECL_ARTIFICIAL (decl)
4260 && DECL_FUNCTION_SCOPE_P (decl)
4261 /* Unfortunately, import_export_decl has not always been called
4262 before the function is processed, so we cannot simply check
4264 && (DECL_COMDAT (DECL_CONTEXT (decl))
4265 || ((DECL_DECLARED_INLINE_P (DECL_CONTEXT (decl))
4266 || DECL_TEMPLATE_INSTANTIATION (DECL_CONTEXT (decl)))
4267 && TREE_PUBLIC (DECL_CONTEXT (decl)))))
4271 /* With weak symbols, we simply make the variable COMDAT;
4272 that will cause copies in multiple translations units to
4274 comdat_linkage (decl);
4278 if (DECL_INITIAL (decl) == NULL_TREE
4279 || DECL_INITIAL (decl) == error_mark_node)
4281 /* Without weak symbols, we can use COMMON to merge
4282 uninitialized variables. */
4283 TREE_PUBLIC (decl) = 1;
4284 DECL_COMMON (decl) = 1;
4288 /* While for initialized variables, we must use internal
4289 linkage -- which means that multiple copies will not
4291 TREE_PUBLIC (decl) = 0;
4292 DECL_COMMON (decl) = 0;
4293 warning (0, "sorry: semantics of inline function static "
4294 "data %q+#D are wrong (you'll wind up "
4295 "with multiple copies)", decl);
4296 warning (0, "%J you can work around this by removing "
4302 else if (DECL_LANG_SPECIFIC (decl) && DECL_COMDAT (decl))
4303 /* Set it up again; we might have set DECL_INITIAL since the last
4305 comdat_linkage (decl);
4308 /* Issue an error message if DECL is an uninitialized const variable. */
4311 check_for_uninitialized_const_var (tree decl)
4313 tree type = TREE_TYPE (decl);
4315 /* ``Unless explicitly declared extern, a const object does not have
4316 external linkage and must be initialized. ($8.4; $12.1)'' ARM
4318 if (TREE_CODE (decl) == VAR_DECL
4319 && TREE_CODE (type) != REFERENCE_TYPE
4320 && CP_TYPE_CONST_P (type)
4321 && !TYPE_NEEDS_CONSTRUCTING (type)
4322 && !DECL_INITIAL (decl))
4323 error ("uninitialized const %qD", decl);
4327 /* Structure holding the current initializer being processed by reshape_init.
4328 CUR is a pointer to the current element being processed, END is a pointer
4329 after the last element present in the initializer. */
4330 typedef struct reshape_iterator_t
4332 constructor_elt *cur;
4333 constructor_elt *end;
4336 static tree reshape_init_r (tree, reshape_iter *, bool);
4338 /* FIELD is a FIELD_DECL or NULL. In the former case, the value
4339 returned is the next FIELD_DECL (possibly FIELD itself) that can be
4340 initialized. If there are no more such fields, the return value
4344 next_initializable_field (tree field)
4347 && (TREE_CODE (field) != FIELD_DECL
4348 || (DECL_C_BIT_FIELD (field) && !DECL_NAME (field))
4349 || DECL_ARTIFICIAL (field)))
4350 field = TREE_CHAIN (field);
4355 /* Subroutine of reshape_init_array and reshape_init_vector, which does
4356 the actual work. ELT_TYPE is the element type of the array. MAX_INDEX is an
4357 INTEGER_CST representing the size of the array minus one (the maximum index),
4358 or NULL_TREE if the array was declared without specifying the size. D is
4359 the iterator within the constructor. */
4362 reshape_init_array_1 (tree elt_type, tree max_index, reshape_iter *d)
4365 bool sized_array_p = (max_index != NULL_TREE);
4366 unsigned HOST_WIDE_INT max_index_cst = 0;
4367 unsigned HOST_WIDE_INT index;
4369 /* The initializer for an array is always a CONSTRUCTOR. */
4370 new_init = build_constructor (NULL_TREE, NULL);
4374 /* Minus 1 is used for zero sized arrays. */
4375 if (integer_all_onesp (max_index))
4378 if (host_integerp (max_index, 1))
4379 max_index_cst = tree_low_cst (max_index, 1);
4380 /* sizetype is sign extended, not zero extended. */
4382 max_index_cst = tree_low_cst (fold_convert (size_type_node, max_index),
4386 /* Loop until there are no more initializers. */
4388 d->cur != d->end && (!sized_array_p || index <= max_index_cst);
4395 /* Handle array designated initializers (GNU extension). */
4396 if (TREE_CODE (d->cur->index) == IDENTIFIER_NODE)
4398 error ("name %qD used in a GNU-style designated "
4399 "initializer for an array", d->cur->index);
4405 elt_init = reshape_init_r (elt_type, d, /*first_initializer_p=*/false);
4406 if (elt_init == error_mark_node)
4407 return error_mark_node;
4408 CONSTRUCTOR_APPEND_ELT (CONSTRUCTOR_ELTS (new_init), NULL_TREE, elt_init);
4414 /* Subroutine of reshape_init_r, processes the initializers for arrays.
4415 Parameters are the same of reshape_init_r. */
4418 reshape_init_array (tree type, reshape_iter *d)
4420 tree max_index = NULL_TREE;
4422 gcc_assert (TREE_CODE (type) == ARRAY_TYPE);
4424 if (TYPE_DOMAIN (type))
4425 max_index = array_type_nelts (type);
4427 return reshape_init_array_1 (TREE_TYPE (type), max_index, d);
4430 /* Subroutine of reshape_init_r, processes the initializers for vectors.
4431 Parameters are the same of reshape_init_r. */
4434 reshape_init_vector (tree type, reshape_iter *d)
4436 tree max_index = NULL_TREE;
4439 gcc_assert (TREE_CODE (type) == VECTOR_TYPE);
4441 if (COMPOUND_LITERAL_P (d->cur->value))
4443 tree value = d->cur->value;
4444 if (!same_type_p (TREE_TYPE (value), type))
4446 error ("invalid type %qT as initializer for a vector of type %qT",
4447 TREE_TYPE (d->cur->value), type);
4448 value = error_mark_node;
4454 /* For a vector, the representation type is a struct
4455 containing a single member which is an array of the
4456 appropriate size. */
4457 rtype = TYPE_DEBUG_REPRESENTATION_TYPE (type);
4458 if (rtype && TYPE_DOMAIN (TREE_TYPE (TYPE_FIELDS (rtype))))
4459 max_index = array_type_nelts (TREE_TYPE (TYPE_FIELDS (rtype)));
4461 return reshape_init_array_1 (TREE_TYPE (type), max_index, d);
4464 /* Subroutine of reshape_init_r, processes the initializers for classes
4465 or union. Parameters are the same of reshape_init_r. */
4468 reshape_init_class (tree type, reshape_iter *d, bool first_initializer_p)
4473 gcc_assert (CLASS_TYPE_P (type));
4475 /* The initializer for a class is always a CONSTRUCTOR. */
4476 new_init = build_constructor (NULL_TREE, NULL);
4477 field = next_initializable_field (TYPE_FIELDS (type));
4483 An initializer for an aggregate member that is an
4484 empty class shall have the form of an empty
4485 initializer-list {}. */
4486 if (!first_initializer_p)
4488 error ("initializer for %qT must be brace-enclosed", type);
4489 return error_mark_node;
4494 /* Loop through the initializable fields, gathering initializers. */
4495 while (d->cur != d->end)
4499 /* Handle designated initializers, as an extension. */
4503 pedwarn ("ISO C++ does not allow designated initializers");
4505 field = lookup_field_1 (type, d->cur->index, /*want_type=*/false);
4507 if (!field || TREE_CODE (field) != FIELD_DECL)
4508 error ("%qT has no non-static data member named %qD", type,
4512 /* If we processed all the member of the class, we are done. */
4516 field_init = reshape_init_r (TREE_TYPE (field), d,
4517 /*first_initializer_p=*/false);
4518 CONSTRUCTOR_APPEND_ELT (CONSTRUCTOR_ELTS (new_init), field, field_init);
4522 When a union is initialized with a brace-enclosed
4523 initializer, the braces shall only contain an
4524 initializer for the first member of the union. */
4525 if (TREE_CODE (type) == UNION_TYPE)
4528 field = next_initializable_field (TREE_CHAIN (field));
4534 /* Subroutine of reshape_init, which processes a single initializer (part of
4535 a CONSTRUCTOR). TYPE is the type of the variable being initialized, D is the
4536 iterator within the CONSTRUCTOR which points to the initializer to process.
4537 FIRST_INITIALIZER_P is true if this is the first initializer of the
4538 CONSTRUCTOR node. */
4541 reshape_init_r (tree type, reshape_iter *d, bool first_initializer_p)
4543 tree init = d->cur->value;
4545 /* A non-aggregate type is always initialized with a single
4547 if (!CP_AGGREGATE_TYPE_P (type))
4549 /* It is invalid to initialize a non-aggregate type with a
4550 brace-enclosed initializer.
4551 We need to check for BRACE_ENCLOSED_INITIALIZER_P here because
4552 of g++.old-deja/g++.mike/p7626.C: a pointer-to-member constant is
4553 a CONSTRUCTOR (with a record type). */
4554 if (TREE_CODE (init) == CONSTRUCTOR
4555 && BRACE_ENCLOSED_INITIALIZER_P (init)) /* p7626.C */
4557 error ("braces around scalar initializer for type %qT", type);
4558 init = error_mark_node;
4567 All implicit type conversions (clause _conv_) are considered when
4568 initializing the aggregate member with an initializer from an
4569 initializer-list. If the initializer can initialize a member,
4570 the member is initialized. Otherwise, if the member is itself a
4571 non-empty subaggregate, brace elision is assumed and the
4572 initializer is considered for the initialization of the first
4573 member of the subaggregate. */
4574 if (TREE_CODE (init) != CONSTRUCTOR
4575 && can_convert_arg (type, TREE_TYPE (init), init, LOOKUP_NORMAL))
4581 /* [dcl.init.string]
4583 A char array (whether plain char, signed char, or unsigned char)
4584 can be initialized by a string-literal (optionally enclosed in
4585 braces); a wchar_t array can be initialized by a wide
4586 string-literal (optionally enclosed in braces). */
4587 if (TREE_CODE (type) == ARRAY_TYPE
4588 && char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (type))))
4590 tree str_init = init;
4592 /* Strip one level of braces if and only if they enclose a single
4593 element (as allowed by [dcl.init.string]). */
4594 if (!first_initializer_p
4595 && TREE_CODE (str_init) == CONSTRUCTOR
4596 && VEC_length (constructor_elt, CONSTRUCTOR_ELTS (str_init)) == 1)
4598 str_init = VEC_index (constructor_elt,
4599 CONSTRUCTOR_ELTS (str_init), 0)->value;
4602 /* If it's a string literal, then it's the initializer for the array
4603 as a whole. Otherwise, continue with normal initialization for
4604 array types (one value per array element). */
4605 if (TREE_CODE (str_init) == STRING_CST)
4612 /* The following cases are about aggregates. If we are not within a full
4613 initializer already, and there is not a CONSTRUCTOR, it means that there
4614 is a missing set of braces (that is, we are processing the case for
4615 which reshape_init exists). */
4616 if (!first_initializer_p)
4618 if (TREE_CODE (init) == CONSTRUCTOR)
4620 /* For a nested compound literal, there is no need to reshape since
4621 brace elision is not allowed. Even if we decided to allow it,
4622 we should add a call to reshape_init in finish_compound_literal,
4623 before calling digest_init, so changing this code would still
4624 not be necessary. */
4625 if (!COMPOUND_LITERAL_P (init))
4628 gcc_assert (BRACE_ENCLOSED_INITIALIZER_P (init));
4629 return reshape_init (type, init);
4632 gcc_assert (!BRACE_ENCLOSED_INITIALIZER_P (init));
4635 warning (OPT_Wmissing_braces, "missing braces around initializer for %qT",
4639 /* Dispatch to specialized routines. */
4640 if (CLASS_TYPE_P (type))
4641 return reshape_init_class (type, d, first_initializer_p);
4642 else if (TREE_CODE (type) == ARRAY_TYPE)
4643 return reshape_init_array (type, d);
4644 else if (TREE_CODE (type) == VECTOR_TYPE)
4645 return reshape_init_vector (type, d);
4650 /* Undo the brace-elision allowed by [dcl.init.aggr] in a
4651 brace-enclosed aggregate initializer.
4653 INIT is the CONSTRUCTOR containing the list of initializers describing
4654 a brace-enclosed initializer for an entity of the indicated aggregate TYPE.
4655 It may not presently match the shape of the TYPE; for example:
4657 struct S { int a; int b; };
4658 struct S a[] = { 1, 2, 3, 4 };
4660 Here INIT will hold a VEC of four elements, rather than a
4661 VEC of two elements, each itself a VEC of two elements. This
4662 routine transforms INIT from the former form into the latter. The
4663 revised CONSTRUCTOR node is returned. */
4666 reshape_init (tree type, tree init)
4668 VEC(constructor_elt, gc) *v;
4672 gcc_assert (BRACE_ENCLOSED_INITIALIZER_P (init));
4674 v = CONSTRUCTOR_ELTS (init);
4676 /* An empty constructor does not need reshaping, and it is always a valid
4678 if (VEC_empty (constructor_elt, v))
4681 /* Recurse on this CONSTRUCTOR. */
4682 d.cur = VEC_index (constructor_elt, v, 0);
4683 d.end = d.cur + VEC_length (constructor_elt, v);
4685 new_init = reshape_init_r (type, &d, true);
4686 if (new_init == error_mark_node)
4687 return error_mark_node;
4689 /* Make sure all the element of the constructor were used. Otherwise,
4690 issue an error about exceeding initializers. */
4692 error ("too many initializers for %qT", type);
4697 /* Verify INIT (the initializer for DECL), and record the
4698 initialization in DECL_INITIAL, if appropriate. CLEANUP is as for
4699 grok_reference_init.
4701 If the return value is non-NULL, it is an expression that must be
4702 evaluated dynamically to initialize DECL. */
4705 check_initializer (tree decl, tree init, int flags, tree *cleanup)
4707 tree type = TREE_TYPE (decl);
4708 tree init_code = NULL;
4710 /* Things that are going to be initialized need to have complete
4712 TREE_TYPE (decl) = type = complete_type (TREE_TYPE (decl));
4714 if (type == error_mark_node)
4715 /* We will have already complained. */
4717 else if (init && COMPLETE_TYPE_P (type)
4718 && !TREE_CONSTANT (TYPE_SIZE (type)))
4720 error ("variable-sized object %qD may not be initialized", decl);
4723 else if (TREE_CODE (type) == ARRAY_TYPE
4724 && !COMPLETE_TYPE_P (complete_type (TREE_TYPE (type))))
4726 error ("elements of array %q#D have incomplete type", decl);
4729 else if (TREE_CODE (type) != ARRAY_TYPE && !COMPLETE_TYPE_P (type))
4731 error ("%qD has incomplete type", decl);
4732 TREE_TYPE (decl) = error_mark_node;
4736 if (TREE_CODE (decl) == CONST_DECL)
4738 gcc_assert (TREE_CODE (type) != REFERENCE_TYPE);
4740 DECL_INITIAL (decl) = init;
4742 gcc_assert (init != NULL_TREE);
4745 else if (!DECL_EXTERNAL (decl) && TREE_CODE (type) == REFERENCE_TYPE)
4746 init = grok_reference_init (decl, type, init, cleanup);
4749 /* Do not reshape constructors of vectors (they don't need to be
4751 if (TREE_CODE (init) == CONSTRUCTOR
4752 && !COMPOUND_LITERAL_P (init)
4753 && !TREE_TYPE (init)) /* ptrmemfunc */
4755 init = reshape_init (type, init);
4757 if ((*targetm.vector_opaque_p) (type))
4759 error ("opaque vector types cannot be initialized");
4760 init = error_mark_node;
4764 /* If DECL has an array type without a specific bound, deduce the
4765 array size from the initializer. */
4766 maybe_deduce_size_from_array_init (decl, init);
4767 type = TREE_TYPE (decl);
4768 if (type == error_mark_node)
4771 if (TYPE_HAS_CONSTRUCTOR (type) || TYPE_NEEDS_CONSTRUCTING (type))
4773 if (TREE_CODE (type) == ARRAY_TYPE)
4774 goto initialize_aggr;
4775 else if (TREE_CODE (init) == CONSTRUCTOR)
4777 if (TYPE_NON_AGGREGATE_CLASS (type))
4779 error ("%qD must be initialized by constructor, "
4782 init = error_mark_node;
4785 goto dont_use_constructor;
4789 int saved_stmts_are_full_exprs_p;
4792 saved_stmts_are_full_exprs_p = 0;
4793 if (building_stmt_tree ())
4795 saved_stmts_are_full_exprs_p = stmts_are_full_exprs_p ();
4796 current_stmt_tree ()->stmts_are_full_exprs_p = 1;
4798 init = build_aggr_init (decl, init, flags);
4799 if (building_stmt_tree ())
4800 current_stmt_tree ()->stmts_are_full_exprs_p =
4801 saved_stmts_are_full_exprs_p;
4807 dont_use_constructor:
4808 if (TREE_CODE (init) != TREE_VEC)
4810 init_code = store_init_value (decl, init);
4811 if (pedantic && TREE_CODE (type) == ARRAY_TYPE
4812 && DECL_INITIAL (decl)
4813 && TREE_CODE (DECL_INITIAL (decl)) == STRING_CST
4814 && PAREN_STRING_LITERAL_P (DECL_INITIAL (decl)))
4815 warning (0, "array %qD initialized by parenthesized string literal %qE",
4816 decl, DECL_INITIAL (decl));
4821 else if (DECL_EXTERNAL (decl))
4823 else if (TYPE_P (type) && TYPE_NEEDS_CONSTRUCTING (type))
4824 goto initialize_aggr;
4825 else if (IS_AGGR_TYPE (type))
4827 tree core_type = strip_array_types (type);
4829 if (CLASSTYPE_READONLY_FIELDS_NEED_INIT (core_type))
4830 error ("structure %qD with uninitialized const members", decl);
4831 if (CLASSTYPE_REF_FIELDS_NEED_INIT (core_type))
4832 error ("structure %qD with uninitialized reference members", decl);
4834 check_for_uninitialized_const_var (decl);
4837 check_for_uninitialized_const_var (decl);
4839 if (init && init != error_mark_node)
4840 init_code = build2 (INIT_EXPR, type, decl, init);
4845 /* If DECL is not a local variable, give it RTL. */
4848 make_rtl_for_nonlocal_decl (tree decl, tree init, const char* asmspec)
4850 int toplev = toplevel_bindings_p ();
4852 const char *filename;
4854 /* Set the DECL_ASSEMBLER_NAME for the object. */
4857 /* The `register' keyword, when used together with an
4858 asm-specification, indicates that the variable should be
4859 placed in a particular register. */
4860 if (TREE_CODE (decl) == VAR_DECL && DECL_REGISTER (decl))
4862 set_user_assembler_name (decl, asmspec);
4863 DECL_HARD_REGISTER (decl) = 1;
4867 if (TREE_CODE (decl) == FUNCTION_DECL
4868 && DECL_BUILT_IN_CLASS (decl) == BUILT_IN_NORMAL)
4869 set_builtin_user_assembler_name (decl, asmspec);
4870 set_user_assembler_name (decl, asmspec);
4874 /* Handle non-variables up front. */
4875 if (TREE_CODE (decl) != VAR_DECL)
4877 rest_of_decl_compilation (decl, toplev, at_eof);
4881 /* If we see a class member here, it should be a static data
4883 if (DECL_LANG_SPECIFIC (decl) && DECL_IN_AGGR_P (decl))
4885 gcc_assert (TREE_STATIC (decl));
4886 /* An in-class declaration of a static data member should be
4887 external; it is only a declaration, and not a definition. */
4888 if (init == NULL_TREE)
4889 gcc_assert (DECL_EXTERNAL (decl));
4892 /* We don't create any RTL for local variables. */
4893 if (DECL_FUNCTION_SCOPE_P (decl) && !TREE_STATIC (decl))
4896 /* We defer emission of local statics until the corresponding
4897 DECL_EXPR is expanded. */
4898 defer_p = DECL_FUNCTION_SCOPE_P (decl) || DECL_VIRTUAL_P (decl);
4900 /* We try to defer namespace-scope static constants so that they are
4901 not emitted into the object file unnecessarily. */
4902 filename = input_filename;
4903 if (!DECL_VIRTUAL_P (decl)
4904 && TREE_READONLY (decl)
4905 && DECL_INITIAL (decl) != NULL_TREE
4906 && DECL_INITIAL (decl) != error_mark_node
4908 && ! EMPTY_CONSTRUCTOR_P (DECL_INITIAL (decl))
4910 && !TREE_PUBLIC (decl))
4912 /* Fool with the linkage of static consts according to #pragma
4914 struct c_fileinfo *finfo = get_fileinfo (lbasename (filename));
4915 if (!finfo->interface_unknown && !TREE_PUBLIC (decl))
4917 TREE_PUBLIC (decl) = 1;
4918 DECL_EXTERNAL (decl) = finfo->interface_only;
4923 /* Likewise for template instantiations. */
4924 else if (DECL_LANG_SPECIFIC (decl)
4925 && DECL_IMPLICIT_INSTANTIATION (decl))
4928 /* If we're not deferring, go ahead and assemble the variable. */
4930 rest_of_decl_compilation (decl, toplev, at_eof);
4933 /* Generate code to initialize DECL (a local variable). */
4936 initialize_local_var (tree decl, tree init)
4938 tree type = TREE_TYPE (decl);
4941 gcc_assert (TREE_CODE (decl) == VAR_DECL
4942 || TREE_CODE (decl) == RESULT_DECL);
4943 gcc_assert (!TREE_STATIC (decl));
4945 if (DECL_SIZE (decl) == NULL_TREE)
4947 /* If we used it already as memory, it must stay in memory. */
4948 DECL_INITIAL (decl) = NULL_TREE;
4949 TREE_ADDRESSABLE (decl) = TREE_USED (decl);
4952 if (DECL_SIZE (decl) && type != error_mark_node)
4956 /* Compute and store the initial value. */
4957 already_used = TREE_USED (decl) || TREE_USED (type);
4959 /* Perform the initialization. */
4962 int saved_stmts_are_full_exprs_p;
4964 gcc_assert (building_stmt_tree ());
4965 saved_stmts_are_full_exprs_p = stmts_are_full_exprs_p ();
4966 current_stmt_tree ()->stmts_are_full_exprs_p = 1;
4967 finish_expr_stmt (init);
4968 current_stmt_tree ()->stmts_are_full_exprs_p =
4969 saved_stmts_are_full_exprs_p;
4972 /* Set this to 0 so we can tell whether an aggregate which was
4973 initialized was ever used. Don't do this if it has a
4974 destructor, so we don't complain about the 'resource
4975 allocation is initialization' idiom. Now set
4976 attribute((unused)) on types so decls of that type will be
4977 marked used. (see TREE_USED, above.) */
4978 if (TYPE_NEEDS_CONSTRUCTING (type)
4980 && TYPE_HAS_TRIVIAL_DESTRUCTOR (type)
4981 && DECL_NAME (decl))
4982 TREE_USED (decl) = 0;
4983 else if (already_used)
4984 TREE_USED (decl) = 1;
4987 /* Generate a cleanup, if necessary. */
4988 cleanup = cxx_maybe_build_cleanup (decl);
4989 if (DECL_SIZE (decl) && cleanup)
4990 finish_decl_cleanup (decl, cleanup);
4993 /* DECL is a VAR_DECL for a compiler-generated variable with static
4994 storage duration (like a virtual table) whose initializer is a
4995 compile-time constant. INIT must be either a TREE_LIST of values,
4996 or a CONSTRUCTOR. Initialize the variable and provide it to the
5000 initialize_artificial_var (tree decl, tree init)
5002 if (TREE_CODE (init) == TREE_LIST)
5003 init = build_constructor_from_list (NULL_TREE, init);
5004 gcc_assert (TREE_CODE (init) == CONSTRUCTOR);
5005 DECL_INITIAL (decl) = init;
5006 DECL_INITIALIZED_P (decl) = 1;
5007 determine_visibility (decl);
5008 layout_var_decl (decl);
5009 maybe_commonize_var (decl);
5010 make_rtl_for_nonlocal_decl (decl, init, /*asmspec=*/NULL);
5013 /* Finish processing of a declaration;
5014 install its line number and initial value.
5015 If the length of an array type is not known before,
5016 it must be determined now, from the initial value, or it is an error.
5018 INIT is the initializer (if any) for DECL. If INIT_CONST_EXPR_P is
5019 true, then INIT is an integral constant expression.
5021 FLAGS is LOOKUP_ONLYCONVERTING if the = init syntax was used, else 0
5022 if the (init) syntax was used. */
5025 cp_finish_decl (tree decl, tree init, bool init_const_expr_p,
5026 tree asmspec_tree, int flags)
5030 const char *asmspec = NULL;
5031 int was_readonly = 0;
5032 bool var_definition_p = false;
5033 int saved_processing_template_decl;
5035 if (decl == error_mark_node)
5040 error ("assignment (not initialization) in declaration");
5044 gcc_assert (TREE_CODE (decl) != RESULT_DECL);
5045 /* Parameters are handled by store_parm_decls, not cp_finish_decl. */
5046 gcc_assert (TREE_CODE (decl) != PARM_DECL);
5048 type = TREE_TYPE (decl);
5049 if (type == error_mark_node)
5052 /* Assume no cleanup is required. */
5053 cleanup = NULL_TREE;
5054 saved_processing_template_decl = processing_template_decl;
5056 /* If a name was specified, get the string. */
5057 if (global_scope_p (current_binding_level))
5058 asmspec_tree = maybe_apply_renaming_pragma (decl, asmspec_tree);
5059 if (asmspec_tree && asmspec_tree != error_mark_node)
5060 asmspec = TREE_STRING_POINTER (asmspec_tree);
5062 if (current_class_type
5063 && CP_DECL_CONTEXT (decl) == current_class_type
5064 && TYPE_BEING_DEFINED (current_class_type)
5065 && (DECL_INITIAL (decl) || init))
5066 DECL_INITIALIZED_IN_CLASS_P (decl) = 1;
5068 if (processing_template_decl)
5070 bool type_dependent_p;
5072 /* Add this declaration to the statement-tree. */
5073 if (at_function_scope_p ())
5074 add_decl_expr (decl);
5076 type_dependent_p = dependent_type_p (type);
5078 if (init && init_const_expr_p)
5080 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (decl) = 1;
5081 if (DECL_INTEGRAL_CONSTANT_VAR_P (decl))
5082 TREE_CONSTANT (decl) = 1;
5086 || !DECL_CLASS_SCOPE_P (decl)
5087 || !DECL_INTEGRAL_CONSTANT_VAR_P (decl)
5089 || value_dependent_expression_p (init))
5092 DECL_INITIAL (decl) = init;
5093 if (TREE_CODE (decl) == VAR_DECL
5094 && !DECL_PRETTY_FUNCTION_P (decl)
5095 && !type_dependent_p)
5096 maybe_deduce_size_from_array_init (decl, init);
5100 init = fold_non_dependent_expr (init);
5101 processing_template_decl = 0;
5104 /* Take care of TYPE_DECLs up front. */
5105 if (TREE_CODE (decl) == TYPE_DECL)
5107 if (type != error_mark_node
5108 && IS_AGGR_TYPE (type) && DECL_NAME (decl))
5110 if (TREE_TYPE (DECL_NAME (decl)) && TREE_TYPE (decl) != type)
5111 warning (0, "shadowing previous type declaration of %q#D", decl);
5112 set_identifier_type_value (DECL_NAME (decl), decl);
5115 /* If we have installed this as the canonical typedef for this
5116 type, and that type has not been defined yet, delay emitting
5117 the debug information for it, as we will emit it later. */
5118 if (TYPE_MAIN_DECL (TREE_TYPE (decl)) == decl
5119 && !COMPLETE_TYPE_P (TREE_TYPE (decl)))
5120 TYPE_DECL_SUPPRESS_DEBUG (decl) = 1;
5122 rest_of_decl_compilation (decl, DECL_CONTEXT (decl) == NULL_TREE,
5127 /* A reference will be modified here, as it is initialized. */
5128 if (! DECL_EXTERNAL (decl)
5129 && TREE_READONLY (decl)
5130 && TREE_CODE (type) == REFERENCE_TYPE)
5133 TREE_READONLY (decl) = 0;
5136 if (TREE_CODE (decl) == VAR_DECL)
5138 /* Only PODs can have thread-local storage. Other types may require
5139 various kinds of non-trivial initialization. */
5140 if (DECL_THREAD_LOCAL_P (decl) && !pod_type_p (TREE_TYPE (decl)))
5141 error ("%qD cannot be thread-local because it has non-POD type %qT",
5142 decl, TREE_TYPE (decl));
5143 /* Convert the initializer to the type of DECL, if we have not
5144 already initialized DECL. */
5145 if (!DECL_INITIALIZED_P (decl)
5146 /* If !DECL_EXTERNAL then DECL is being defined. In the
5147 case of a static data member initialized inside the
5148 class-specifier, there can be an initializer even if DECL
5149 is *not* defined. */
5150 && (!DECL_EXTERNAL (decl) || init))
5154 DECL_NONTRIVIALLY_INITIALIZED_P (decl) = 1;
5155 if (init_const_expr_p)
5157 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (decl) = 1;
5158 if (DECL_INTEGRAL_CONSTANT_VAR_P (decl))
5159 TREE_CONSTANT (decl) = 1;
5162 init = check_initializer (decl, init, flags, &cleanup);
5163 /* Thread-local storage cannot be dynamically initialized. */
5164 if (DECL_THREAD_LOCAL_P (decl) && init)
5166 error ("%qD is thread-local and so cannot be dynamically "
5167 "initialized", decl);
5171 /* Check that the initializer for a static data member was a
5172 constant. Although we check in the parser that the
5173 initializer is an integral constant expression, we do not
5174 simplify division-by-zero at the point at which it
5175 occurs. Therefore, in:
5177 struct S { static const int i = 7 / 0; };
5179 we issue an error at this point. It would
5180 probably be better to forbid division by zero in
5181 integral constant expressions. */
5182 if (DECL_EXTERNAL (decl) && init)
5184 error ("%qD cannot be initialized by a non-constant expression"
5185 " when being declared", decl);
5186 DECL_INITIALIZED_IN_CLASS_P (decl) = 0;
5194 The memory occupied by any object of static storage
5195 duration is zero-initialized at program startup before
5196 any other initialization takes place.
5198 We cannot create an appropriate initializer until after
5199 the type of DECL is finalized. If DECL_INITIAL is set,
5200 then the DECL is statically initialized, and any
5201 necessary zero-initialization has already been performed. */
5202 if (TREE_STATIC (decl) && !DECL_INITIAL (decl))
5203 DECL_INITIAL (decl) = build_zero_init (TREE_TYPE (decl),
5204 /*nelts=*/NULL_TREE,
5205 /*static_storage_p=*/true);
5206 /* Remember that the initialization for this variable has
5208 DECL_INITIALIZED_P (decl) = 1;
5209 /* This declaration is the definition of this variable,
5210 unless we are initializing a static data member within
5211 the class specifier. */
5212 if (!DECL_EXTERNAL (decl))
5213 var_definition_p = true;
5215 /* If the variable has an array type, lay out the type, even if
5216 there is no initializer. It is valid to index through the
5217 array, and we must get TYPE_ALIGN set correctly on the array
5219 else if (TREE_CODE (type) == ARRAY_TYPE)
5223 /* Add this declaration to the statement-tree. This needs to happen
5224 after the call to check_initializer so that the DECL_EXPR for a
5225 reference temp is added before the DECL_EXPR for the reference itself. */
5226 if (at_function_scope_p ())
5227 add_decl_expr (decl);
5229 /* Let the middle end know about variables and functions -- but not
5230 static data members in uninstantiated class templates. */
5231 if (!saved_processing_template_decl
5232 && (TREE_CODE (decl) == VAR_DECL
5233 || TREE_CODE (decl) == FUNCTION_DECL))
5235 if (TREE_CODE (decl) == VAR_DECL)
5237 layout_var_decl (decl);
5238 maybe_commonize_var (decl);
5241 make_rtl_for_nonlocal_decl (decl, init, asmspec);
5243 /* Check for abstractness of the type. Notice that there is no
5244 need to strip array types here since the check for those types
5245 is already done within create_array_type_for_decl. */
5246 if (TREE_CODE (type) == FUNCTION_TYPE
5247 || TREE_CODE (type) == METHOD_TYPE)
5248 abstract_virtuals_error (decl, TREE_TYPE (type));
5250 abstract_virtuals_error (decl, type);
5252 /* This needs to happen after the linkage is set. */
5253 determine_visibility (decl);
5255 if (TREE_CODE (decl) == FUNCTION_DECL
5256 || TREE_TYPE (decl) == error_mark_node)
5257 /* No initialization required. */
5259 else if (DECL_EXTERNAL (decl)
5260 && ! (DECL_LANG_SPECIFIC (decl)
5261 && DECL_NOT_REALLY_EXTERN (decl)))
5264 DECL_INITIAL (decl) = init;
5268 /* A variable definition. */
5269 if (DECL_FUNCTION_SCOPE_P (decl))
5271 /* Initialize the local variable. */
5272 if (processing_template_decl)
5273 DECL_INITIAL (decl) = init;
5274 else if (!TREE_STATIC (decl))
5275 initialize_local_var (decl, init);
5278 /* If a variable is defined, and then a subsequent
5279 definition with external linkage is encountered, we will
5280 get here twice for the same variable. We want to avoid
5281 calling expand_static_init more than once. For variables
5282 that are not static data members, we can call
5283 expand_static_init only when we actually process the
5284 initializer. It is not legal to redeclare a static data
5285 member, so this issue does not arise in that case. */
5286 if (var_definition_p && TREE_STATIC (decl))
5287 expand_static_init (decl, init);
5291 /* If a CLEANUP_STMT was created to destroy a temporary bound to a
5292 reference, insert it in the statement-tree now. */
5294 push_cleanup (decl, cleanup, false);
5297 processing_template_decl = saved_processing_template_decl;
5300 TREE_READONLY (decl) = 1;
5302 /* If this was marked 'used', be sure it will be output. */
5303 if (lookup_attribute ("used", DECL_ATTRIBUTES (decl)))
5304 mark_decl_referenced (decl);
5307 /* This is here for a midend callback from c-common.c. */
5310 finish_decl (tree decl, tree init, tree asmspec_tree)
5312 cp_finish_decl (decl, init, /*init_const_expr_p=*/false, asmspec_tree, 0);
5315 /* Returns a declaration for a VAR_DECL as if:
5317 extern "C" TYPE NAME;
5319 had been seen. Used to create compiler-generated global
5323 declare_global_var (tree name, tree type)
5327 push_to_top_level ();
5328 decl = build_decl (VAR_DECL, name, type);
5329 TREE_PUBLIC (decl) = 1;
5330 DECL_EXTERNAL (decl) = 1;
5331 DECL_ARTIFICIAL (decl) = 1;
5332 /* If the user has explicitly declared this variable (perhaps
5333 because the code we are compiling is part of a low-level runtime
5334 library), then it is possible that our declaration will be merged
5335 with theirs by pushdecl. */
5336 decl = pushdecl (decl);
5337 finish_decl (decl, NULL_TREE, NULL_TREE);
5338 pop_from_top_level ();
5343 /* Returns a pointer to the `atexit' function. Note that if
5344 FLAG_USE_CXA_ATEXIT is nonzero, then this will actually be the new
5345 `__cxa_atexit' function specified in the IA64 C++ ABI. */
5348 get_atexit_node (void)
5355 bool use_aeabi_atexit;
5360 if (flag_use_cxa_atexit)
5362 /* The declaration for `__cxa_atexit' is:
5364 int __cxa_atexit (void (*)(void *), void *, void *)
5366 We build up the argument types and then then function type
5369 use_aeabi_atexit = targetm.cxx.use_aeabi_atexit ();
5370 /* First, build the pointer-to-function type for the first
5372 arg_types = tree_cons (NULL_TREE, ptr_type_node, void_list_node);
5373 fn_type = build_function_type (void_type_node, arg_types);
5374 fn_ptr_type = build_pointer_type (fn_type);
5375 /* Then, build the rest of the argument types. */
5376 arg_types = tree_cons (NULL_TREE, ptr_type_node, void_list_node);
5377 if (use_aeabi_atexit)
5379 arg_types = tree_cons (NULL_TREE, fn_ptr_type, arg_types);
5380 arg_types = tree_cons (NULL_TREE, ptr_type_node, arg_types);
5384 arg_types = tree_cons (NULL_TREE, ptr_type_node, arg_types);
5385 arg_types = tree_cons (NULL_TREE, fn_ptr_type, arg_types);
5387 /* And the final __cxa_atexit type. */
5388 fn_type = build_function_type (integer_type_node, arg_types);
5389 fn_ptr_type = build_pointer_type (fn_type);
5390 if (use_aeabi_atexit)
5391 name = "__aeabi_atexit";
5393 name = "__cxa_atexit";
5397 /* The declaration for `atexit' is:
5399 int atexit (void (*)());
5401 We build up the argument types and then then function type
5403 fn_type = build_function_type (void_type_node, void_list_node);
5404 fn_ptr_type = build_pointer_type (fn_type);
5405 arg_types = tree_cons (NULL_TREE, fn_ptr_type, void_list_node);
5406 /* Build the final atexit type. */
5407 fn_type = build_function_type (integer_type_node, arg_types);
5411 /* Now, build the function declaration. */
5412 push_lang_context (lang_name_c);
5413 atexit_fndecl = build_library_fn_ptr (name, fn_type);
5414 mark_used (atexit_fndecl);
5415 pop_lang_context ();
5416 atexit_node = decay_conversion (atexit_fndecl);
5421 /* Returns the __dso_handle VAR_DECL. */
5424 get_dso_handle_node (void)
5426 if (dso_handle_node)
5427 return dso_handle_node;
5429 /* Declare the variable. */
5430 dso_handle_node = declare_global_var (get_identifier ("__dso_handle"),
5433 return dso_handle_node;
5436 /* Begin a new function with internal linkage whose job will be simply
5437 to destroy some particular variable. */
5439 static GTY(()) int start_cleanup_cnt;
5442 start_cleanup_fn (void)
5449 push_to_top_level ();
5451 /* No need to mangle this. */
5452 push_lang_context (lang_name_c);
5454 /* Build the parameter-types. */
5455 parmtypes = void_list_node;
5456 /* Functions passed to __cxa_atexit take an additional parameter.
5457 We'll just ignore it. After we implement the new calling
5458 convention for destructors, we can eliminate the use of
5459 additional cleanup functions entirely in the -fnew-abi case. */
5460 if (flag_use_cxa_atexit)
5461 parmtypes = tree_cons (NULL_TREE, ptr_type_node, parmtypes);
5462 /* Build the function type itself. */
5463 fntype = build_function_type (void_type_node, parmtypes);
5464 /* Build the name of the function. */
5465 sprintf (name, "__tcf_%d", start_cleanup_cnt++);
5466 /* Build the function declaration. */
5467 fndecl = build_lang_decl (FUNCTION_DECL, get_identifier (name), fntype);
5468 /* It's a function with internal linkage, generated by the
5470 TREE_PUBLIC (fndecl) = 0;
5471 DECL_ARTIFICIAL (fndecl) = 1;
5472 /* Make the function `inline' so that it is only emitted if it is
5473 actually needed. It is unlikely that it will be inlined, since
5474 it is only called via a function pointer, but we avoid unnecessary
5475 emissions this way. */
5476 DECL_INLINE (fndecl) = 1;
5477 DECL_DECLARED_INLINE_P (fndecl) = 1;
5478 DECL_INTERFACE_KNOWN (fndecl) = 1;
5479 /* Build the parameter. */
5480 if (flag_use_cxa_atexit)
5484 parmdecl = cp_build_parm_decl (NULL_TREE, ptr_type_node);
5485 DECL_CONTEXT (parmdecl) = fndecl;
5486 TREE_USED (parmdecl) = 1;
5487 DECL_ARGUMENTS (fndecl) = parmdecl;
5491 start_preparsed_function (fndecl, NULL_TREE, SF_PRE_PARSED);
5493 pop_lang_context ();
5495 return current_function_decl;
5498 /* Finish the cleanup function begun by start_cleanup_fn. */
5501 end_cleanup_fn (void)
5503 expand_or_defer_fn (finish_function (0));
5505 pop_from_top_level ();
5508 /* Generate code to handle the destruction of DECL, an object with
5509 static storage duration. */
5512 register_dtor_fn (tree decl)
5519 if (TYPE_HAS_TRIVIAL_DESTRUCTOR (TREE_TYPE (decl)))
5520 return void_zero_node;
5522 /* Call build_cleanup before we enter the anonymous function so that
5523 any access checks will be done relative to the current scope,
5524 rather than the scope of the anonymous function. */
5525 build_cleanup (decl);
5527 /* Now start the function. */
5528 cleanup = start_cleanup_fn ();
5530 /* Now, recompute the cleanup. It may contain SAVE_EXPRs that refer
5531 to the original function, rather than the anonymous one. That
5532 will make the back-end think that nested functions are in use,
5533 which causes confusion. */
5535 push_deferring_access_checks (dk_no_check);
5536 fcall = build_cleanup (decl);
5537 pop_deferring_access_checks ();
5539 /* Create the body of the anonymous function. */
5540 compound_stmt = begin_compound_stmt (BCS_FN_BODY);
5541 finish_expr_stmt (fcall);
5542 finish_compound_stmt (compound_stmt);
5545 /* Call atexit with the cleanup function. */
5546 cxx_mark_addressable (cleanup);
5547 mark_used (cleanup);
5548 cleanup = build_unary_op (ADDR_EXPR, cleanup, 0);
5549 if (flag_use_cxa_atexit)
5551 args = tree_cons (NULL_TREE,
5552 build_unary_op (ADDR_EXPR, get_dso_handle_node (), 0),
5554 if (targetm.cxx.use_aeabi_atexit ())
5556 args = tree_cons (NULL_TREE, cleanup, args);
5557 args = tree_cons (NULL_TREE, null_pointer_node, args);
5561 args = tree_cons (NULL_TREE, null_pointer_node, args);
5562 args = tree_cons (NULL_TREE, cleanup, args);
5566 args = tree_cons (NULL_TREE, cleanup, NULL_TREE);
5567 return build_function_call (get_atexit_node (), args);
5570 /* DECL is a VAR_DECL with static storage duration. INIT, if present,
5571 is its initializer. Generate code to handle the construction
5572 and destruction of DECL. */
5575 expand_static_init (tree decl, tree init)
5577 gcc_assert (TREE_CODE (decl) == VAR_DECL);
5578 gcc_assert (TREE_STATIC (decl));
5580 /* Some variables require no initialization. */
5582 && !TYPE_NEEDS_CONSTRUCTING (TREE_TYPE (decl))
5583 && TYPE_HAS_TRIVIAL_DESTRUCTOR (TREE_TYPE (decl)))
5586 if (DECL_FUNCTION_SCOPE_P (decl))
5588 /* Emit code to perform this initialization but once. */
5589 tree if_stmt = NULL_TREE, inner_if_stmt = NULL_TREE;
5590 tree then_clause = NULL_TREE, inner_then_clause = NULL_TREE;
5591 tree guard, guard_addr, guard_addr_list;
5592 tree acquire_fn, release_fn, abort_fn;
5595 /* Emit code to perform this initialization but once. This code
5598 static <type> guard;
5599 if (!guard.first_byte) {
5600 if (__cxa_guard_acquire (&guard)) {
5603 // Do initialization.
5604 flag = true; __cxa_guard_release (&guard);
5605 // Register variable for destruction at end of program.
5607 if (!flag) __cxa_guard_abort (&guard);
5611 Note that the `flag' variable is only set to 1 *after* the
5612 initialization is complete. This ensures that an exception,
5613 thrown during the construction, will cause the variable to
5614 reinitialized when we pass through this code again, as per:
5618 If the initialization exits by throwing an exception, the
5619 initialization is not complete, so it will be tried again
5620 the next time control enters the declaration.
5622 This process should be thread-safe, too; multiple threads
5623 should not be able to initialize the variable more than
5626 /* Create the guard variable. */
5627 guard = get_guard (decl);
5629 /* This optimization isn't safe on targets with relaxed memory
5630 consistency. On such targets we force synchronization in
5631 __cxa_guard_acquire. */
5632 if (!targetm.relaxed_ordering || !flag_threadsafe_statics)
5634 /* Begin the conditional initialization. */
5635 if_stmt = begin_if_stmt ();
5636 finish_if_stmt_cond (get_guard_cond (guard), if_stmt);
5637 then_clause = begin_compound_stmt (BCS_NO_SCOPE);
5640 if (flag_threadsafe_statics)
5642 guard_addr = build_address (guard);
5643 guard_addr_list = build_tree_list (NULL_TREE, guard_addr);
5645 acquire_fn = get_identifier ("__cxa_guard_acquire");
5646 release_fn = get_identifier ("__cxa_guard_release");
5647 abort_fn = get_identifier ("__cxa_guard_abort");
5648 if (!get_global_value_if_present (acquire_fn, &acquire_fn))
5650 tree argtypes = tree_cons (NULL_TREE, TREE_TYPE (guard_addr),
5652 tree vfntype = build_function_type (void_type_node, argtypes);
5653 acquire_fn = push_library_fn
5654 (acquire_fn, build_function_type (integer_type_node, argtypes));
5655 release_fn = push_library_fn (release_fn, vfntype);
5656 abort_fn = push_library_fn (abort_fn, vfntype);
5660 release_fn = identifier_global_value (release_fn);
5661 abort_fn = identifier_global_value (abort_fn);
5664 inner_if_stmt = begin_if_stmt ();
5665 finish_if_stmt_cond (build_call (acquire_fn, guard_addr_list),
5668 inner_then_clause = begin_compound_stmt (BCS_NO_SCOPE);
5669 begin = get_target_expr (boolean_false_node);
5670 flag = TARGET_EXPR_SLOT (begin);
5672 TARGET_EXPR_CLEANUP (begin)
5673 = build3 (COND_EXPR, void_type_node, flag,
5675 build_call (abort_fn, guard_addr_list));
5676 CLEANUP_EH_ONLY (begin) = 1;
5678 /* Do the initialization itself. */
5679 init = add_stmt_to_compound (begin, init);
5680 init = add_stmt_to_compound
5681 (init, build2 (MODIFY_EXPR, void_type_node, flag, boolean_true_node));
5682 init = add_stmt_to_compound
5683 (init, build_call (release_fn, guard_addr_list));
5686 init = add_stmt_to_compound (init, set_guard (guard));
5688 /* Use atexit to register a function for destroying this static
5690 init = add_stmt_to_compound (init, register_dtor_fn (decl));
5692 finish_expr_stmt (init);
5694 if (flag_threadsafe_statics)
5696 finish_compound_stmt (inner_then_clause);
5697 finish_then_clause (inner_if_stmt);
5698 finish_if_stmt (inner_if_stmt);
5701 if (!targetm.relaxed_ordering || !flag_threadsafe_statics)
5703 finish_compound_stmt (then_clause);
5704 finish_then_clause (if_stmt);
5705 finish_if_stmt (if_stmt);
5709 static_aggregates = tree_cons (init, decl, static_aggregates);
5713 /* Make TYPE a complete type based on INITIAL_VALUE.
5714 Return 0 if successful, 1 if INITIAL_VALUE can't be deciphered,
5715 2 if there was no information (in which case assume 0 if DO_DEFAULT),
5716 3 if the initializer list is empty (in pedantic mode). */
5719 cp_complete_array_type (tree *ptype, tree initial_value, bool do_default)
5722 tree type, elt_type;
5726 /* An array of character type can be initialized from a
5727 brace-enclosed string constant.
5729 FIXME: this code is duplicated from reshape_init. Probably
5730 we should just call reshape_init here? */
5731 if (char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (*ptype)))
5732 && TREE_CODE (initial_value) == CONSTRUCTOR
5733 && !VEC_empty (constructor_elt, CONSTRUCTOR_ELTS (initial_value)))
5735 VEC(constructor_elt,gc) *v = CONSTRUCTOR_ELTS (initial_value);
5736 tree value = VEC_index (constructor_elt, v, 0)->value;
5738 if (TREE_CODE (value) == STRING_CST
5739 && VEC_length (constructor_elt, v) == 1)
5740 initial_value = value;
5744 failure = complete_array_type (ptype, initial_value, do_default);
5746 /* We can create the array before the element type is complete, which
5747 means that we didn't have these two bits set in the original type
5748 either. In completing the type, we are expected to propagate these
5749 bits. See also complete_type which does the same thing for arrays
5752 if (TYPE_DOMAIN (type))
5754 elt_type = TREE_TYPE (type);
5755 TYPE_NEEDS_CONSTRUCTING (type) = TYPE_NEEDS_CONSTRUCTING (elt_type);
5756 TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type)
5757 = TYPE_HAS_NONTRIVIAL_DESTRUCTOR (elt_type);
5763 /* Return zero if something is declared to be a member of type
5764 CTYPE when in the context of CUR_TYPE. STRING is the error
5765 message to print in that case. Otherwise, quietly return 1. */
5768 member_function_or_else (tree ctype, tree cur_type, enum overload_flags flags)
5770 if (ctype && ctype != cur_type)
5772 if (flags == DTOR_FLAG)
5773 error ("destructor for alien class %qT cannot be a member", ctype);
5775 error ("constructor for alien class %qT cannot be a member", ctype);
5781 /* Subroutine of `grokdeclarator'. */
5783 /* Generate errors possibly applicable for a given set of specifiers.
5784 This is for ARM $7.1.2. */
5787 bad_specifiers (tree object,
5796 error ("%qD declared as a %<virtual%> %s", object, type);
5798 error ("%qD declared as an %<inline%> %s", object, type);
5800 error ("%<const%> and %<volatile%> function specifiers on "
5801 "%qD invalid in %s declaration",
5804 error ("%q+D declared as a friend", object);
5806 && (TREE_CODE (object) == TYPE_DECL
5807 || (!TYPE_PTRFN_P (TREE_TYPE (object))
5808 && !TYPE_REFFN_P (TREE_TYPE (object))
5809 && !TYPE_PTRMEMFUNC_P (TREE_TYPE (object)))))
5810 error ("%q+D declared with an exception specification", object);
5813 /* DECL is a member function or static data member and is presently
5814 being defined. Check that the definition is taking place in a
5818 check_class_member_definition_namespace (tree decl)
5820 /* These checks only apply to member functions and static data
5822 gcc_assert (TREE_CODE (decl) == FUNCTION_DECL
5823 || TREE_CODE (decl) == VAR_DECL);
5824 /* We check for problems with specializations in pt.c in
5825 check_specialization_namespace, where we can issue better
5827 if (processing_specialization)
5829 /* There are no restrictions on the placement of
5830 explicit instantiations. */
5831 if (processing_explicit_instantiation)
5835 A member function definition that appears outside of the
5836 class definition shall appear in a namespace scope enclosing
5837 the class definition.
5841 The definition for a static data member shall appear in a
5842 namespace scope enclosing the member's class definition. */
5843 if (!is_ancestor (current_namespace, DECL_CONTEXT (decl)))
5844 pedwarn ("definition of %qD is not in namespace enclosing %qT",
5845 decl, DECL_CONTEXT (decl));
5848 /* Build a PARM_DECL for the "this" parameter. TYPE is the
5849 METHOD_TYPE for a non-static member function; QUALS are the
5850 cv-qualifiers that apply to the function. */
5853 build_this_parm (tree type, cp_cv_quals quals)
5858 cp_cv_quals this_quals;
5860 this_type = TREE_VALUE (TYPE_ARG_TYPES (type));
5861 /* The `this' parameter is implicitly `const'; it cannot be
5863 this_quals = (quals & TYPE_QUAL_RESTRICT) | TYPE_QUAL_CONST;
5864 qual_type = cp_build_qualified_type (this_type, this_quals);
5865 parm = build_artificial_parm (this_identifier, qual_type);
5866 cp_apply_type_quals_to_decl (this_quals, parm);
5870 /* CTYPE is class type, or null if non-class.
5871 TYPE is type this FUNCTION_DECL should have, either FUNCTION_TYPE
5873 DECLARATOR is the function's name.
5874 PARMS is a chain of PARM_DECLs for the function.
5875 VIRTUALP is truthvalue of whether the function is virtual or not.
5876 FLAGS are to be passed through to `grokclassfn'.
5877 QUALS are qualifiers indicating whether the function is `const'
5879 RAISES is a list of exceptions that this function can raise.
5880 CHECK is 1 if we must find this method in CTYPE, 0 if we should
5881 not look, and -1 if we should not call `grokclassfn' at all.
5883 SFK is the kind of special function (if any) for the new function.
5885 Returns `NULL_TREE' if something goes wrong, after issuing
5886 applicable error messages. */
5889 grokfndecl (tree ctype,
5893 tree orig_declarator,
5895 enum overload_flags flags,
5902 special_function_kind sfk,
5909 int staticp = ctype && TREE_CODE (type) == FUNCTION_TYPE;
5913 type = build_exception_variant (type, raises);
5915 decl = build_lang_decl (FUNCTION_DECL, declarator, type);
5916 if (TREE_CODE (type) == METHOD_TYPE)
5919 parm = build_this_parm (type, quals);
5920 TREE_CHAIN (parm) = parms;
5923 DECL_ARGUMENTS (decl) = parms;
5924 /* Propagate volatile out from type to decl. */
5925 if (TYPE_VOLATILE (type))
5926 TREE_THIS_VOLATILE (decl) = 1;
5929 && TREE_CODE (orig_declarator) == TEMPLATE_ID_EXPR)
5933 ("defining explicit specialization %qD in friend declaration",
5937 tree fns = TREE_OPERAND (orig_declarator, 0);
5938 tree args = TREE_OPERAND (orig_declarator, 1);
5940 if (PROCESSING_REAL_TEMPLATE_DECL_P ())
5942 /* Something like `template <class T> friend void f<T>()'. */
5943 error ("invalid use of template-id %qD in declaration "
5944 "of primary template",
5950 /* A friend declaration of the form friend void f<>(). Record
5951 the information in the TEMPLATE_ID_EXPR. */
5952 SET_DECL_IMPLICIT_INSTANTIATION (decl);
5954 if (TREE_CODE (fns) == COMPONENT_REF)
5956 /* Due to bison parser ickiness, we will have already looked
5957 up an operator_name or PFUNCNAME within the current class
5958 (see template_id in parse.y). If the current class contains
5959 such a name, we'll get a COMPONENT_REF here. Undo that. */
5961 gcc_assert (TREE_TYPE (TREE_OPERAND (fns, 0))
5962 == current_class_type);
5963 fns = TREE_OPERAND (fns, 1);
5965 gcc_assert (TREE_CODE (fns) == IDENTIFIER_NODE
5966 || TREE_CODE (fns) == OVERLOAD);
5967 DECL_TEMPLATE_INFO (decl) = tree_cons (fns, args, NULL_TREE);
5969 for (t = TYPE_ARG_TYPES (TREE_TYPE (decl)); t; t = TREE_CHAIN (t))
5970 if (TREE_PURPOSE (t)
5971 && TREE_CODE (TREE_PURPOSE (t)) == DEFAULT_ARG)
5973 error ("default arguments are not allowed in declaration "
5974 "of friend template specialization %qD",
5981 error ("%<inline%> is not allowed in declaration of friend "
5982 "template specialization %qD",
5989 /* If this decl has namespace scope, set that up. */
5991 set_decl_namespace (decl, in_namespace, friendp);
5993 DECL_CONTEXT (decl) = FROB_CONTEXT (current_namespace);
5995 /* `main' and builtins have implicit 'C' linkage. */
5996 if ((MAIN_NAME_P (declarator)
5997 || (IDENTIFIER_LENGTH (declarator) > 10
5998 && IDENTIFIER_POINTER (declarator)[0] == '_'
5999 && IDENTIFIER_POINTER (declarator)[1] == '_'
6000 && strncmp (IDENTIFIER_POINTER (declarator)+2, "builtin_", 8) == 0))
6001 && current_lang_name == lang_name_cplusplus
6002 && ctype == NULL_TREE
6003 /* NULL_TREE means global namespace. */
6004 && DECL_CONTEXT (decl) == NULL_TREE)
6005 SET_DECL_LANGUAGE (decl, lang_c);
6007 /* Should probably propagate const out from type to decl I bet (mrs). */
6010 DECL_STATIC_FUNCTION_P (decl) = 1;
6011 DECL_CONTEXT (decl) = ctype;
6016 DECL_CONTEXT (decl) = ctype;
6018 check_class_member_definition_namespace (decl);
6021 if (ctype == NULL_TREE && DECL_MAIN_P (decl))
6023 if (processing_template_decl)
6024 error ("cannot declare %<::main%> to be a template");
6026 error ("cannot declare %<::main%> to be inline");
6028 error ("cannot declare %<::main%> to be static");
6029 if (!same_type_p (TREE_TYPE (TREE_TYPE (decl)),
6032 tree oldtypeargs = TYPE_ARG_TYPES (TREE_TYPE (decl));
6034 error ("%<::main%> must return %<int%>");
6035 newtype = build_function_type (integer_type_node,
6037 TREE_TYPE (decl) = newtype;
6043 /* Members of anonymous types and local classes have no linkage; make
6044 them internal. If a typedef is made later, this will be changed. */
6045 if (ctype && (TYPE_ANONYMOUS_P (ctype)
6046 || decl_function_context (TYPE_MAIN_DECL (ctype))))
6051 /* [basic.link]: A name with no linkage (notably, the name of a class
6052 or enumeration declared in a local scope) shall not be used to
6053 declare an entity with linkage.
6055 Only check this for public decls for now. See core 319, 389. */
6056 t = no_linkage_check (TREE_TYPE (decl),
6057 /*relaxed_p=*/false);
6060 if (TYPE_ANONYMOUS_P (t))
6062 if (DECL_EXTERN_C_P (decl))
6063 /* Allow this; it's pretty common in C. */;
6066 pedwarn ("non-local function %q#D uses anonymous type",
6068 if (DECL_ORIGINAL_TYPE (TYPE_NAME (t)))
6069 pedwarn ("%q+#D does not refer to the unqualified "
6070 "type, so it is not used for linkage",
6075 pedwarn ("non-local function %q#D uses local type %qT", decl, t);
6079 TREE_PUBLIC (decl) = publicp;
6082 DECL_INTERFACE_KNOWN (decl) = 1;
6083 DECL_NOT_REALLY_EXTERN (decl) = 1;
6086 /* If the declaration was declared inline, mark it as such. */
6088 DECL_DECLARED_INLINE_P (decl) = 1;
6089 /* We inline functions that are explicitly declared inline, or, when
6090 the user explicitly asks us to, all functions. */
6091 if (DECL_DECLARED_INLINE_P (decl)
6092 || (flag_inline_trees == 2 && !DECL_INLINE (decl) && funcdef_flag))
6093 DECL_INLINE (decl) = 1;
6095 DECL_EXTERNAL (decl) = 1;
6096 if (quals && TREE_CODE (type) == FUNCTION_TYPE)
6098 error ("%smember function %qD cannot have cv-qualifier",
6099 (ctype ? "static " : "non-"), decl);
6100 quals = TYPE_UNQUALIFIED;
6103 if (IDENTIFIER_OPNAME_P (DECL_NAME (decl)))
6104 grok_op_properties (decl, /*complain=*/true);
6106 if (ctype && decl_function_context (decl))
6107 DECL_NO_STATIC_CHAIN (decl) = 1;
6110 /* Make the init_value nonzero so pushdecl knows this is not
6111 tentative. error_mark_node is replaced later with the BLOCK. */
6112 DECL_INITIAL (decl) = error_mark_node;
6114 if (TYPE_NOTHROW_P (type) || nothrow_libfn_p (decl))
6115 TREE_NOTHROW (decl) = 1;
6117 /* Caller will do the rest of this. */
6121 if (ctype != NULL_TREE)
6123 if (sfk == sfk_constructor)
6124 DECL_CONSTRUCTOR_P (decl) = 1;
6126 grokclassfn (ctype, decl, flags);
6129 decl = check_explicit_specialization (orig_declarator, decl,
6132 4 * (friendp != 0));
6133 if (decl == error_mark_node)
6138 cplus_decl_attributes (&decl, *attrlist, 0);
6139 *attrlist = NULL_TREE;
6142 if (ctype != NULL_TREE
6143 && (! TYPE_FOR_JAVA (ctype) || check_java_method (decl))
6148 old_decl = check_classfn (ctype, decl,
6149 (processing_template_decl
6150 > template_class_depth (ctype))
6151 ? current_template_parms
6158 if (TREE_CODE (old_decl) == TEMPLATE_DECL)
6159 /* Because grokfndecl is always supposed to return a
6160 FUNCTION_DECL, we pull out the DECL_TEMPLATE_RESULT
6161 here. We depend on our callers to figure out that its
6162 really a template that's being returned. */
6163 old_decl = DECL_TEMPLATE_RESULT (old_decl);
6165 if (DECL_STATIC_FUNCTION_P (old_decl)
6166 && TREE_CODE (TREE_TYPE (decl)) == METHOD_TYPE)
6167 /* Remove the `this' parm added by grokclassfn.
6168 XXX Isn't this done in start_function, too? */
6169 revert_static_member_fn (decl);
6170 if (DECL_ARTIFICIAL (old_decl))
6171 error ("definition of implicitly-declared %qD", old_decl);
6173 /* Since we've smashed OLD_DECL to its
6174 DECL_TEMPLATE_RESULT, we must do the same to DECL. */
6175 if (TREE_CODE (decl) == TEMPLATE_DECL)
6176 decl = DECL_TEMPLATE_RESULT (decl);
6178 /* Attempt to merge the declarations. This can fail, in
6179 the case of some invalid specialization declarations. */
6180 pushed_scope = push_scope (ctype);
6181 ok = duplicate_decls (decl, old_decl, friendp);
6183 pop_scope (pushed_scope);
6186 error ("no %q#D member function declared in class %qT",
6194 if (DECL_CONSTRUCTOR_P (decl) && !grok_ctor_properties (ctype, decl))
6197 if (ctype == NULL_TREE || check)
6201 DECL_VIRTUAL_P (decl) = 1;
6206 /* DECL is a VAR_DECL for a static data member. Set flags to reflect
6207 the linkage that DECL will receive in the object file. */
6210 set_linkage_for_static_data_member (tree decl)
6212 /* A static data member always has static storage duration and
6213 external linkage. Note that static data members are forbidden in
6214 local classes -- the only situation in which a class has
6215 non-external linkage. */
6216 TREE_PUBLIC (decl) = 1;
6217 TREE_STATIC (decl) = 1;
6218 /* For non-template classes, static data members are always put
6219 out in exactly those files where they are defined, just as
6220 with ordinary namespace-scope variables. */
6221 if (!processing_template_decl)
6222 DECL_INTERFACE_KNOWN (decl) = 1;
6225 /* Create a VAR_DECL named NAME with the indicated TYPE.
6227 If SCOPE is non-NULL, it is the class type or namespace containing
6228 the variable. If SCOPE is NULL, the variable should is created in
6229 the innermost enclosings scope. */
6232 grokvardecl (tree type,
6234 const cp_decl_specifier_seq *declspecs,
6240 tree explicit_scope;
6242 gcc_assert (!name || TREE_CODE (name) == IDENTIFIER_NODE);
6244 /* Compute the scope in which to place the variable, but remember
6245 whether or not that scope was explicitly specified by the user. */
6246 explicit_scope = scope;
6249 /* An explicit "extern" specifier indicates a namespace-scope
6251 if (declspecs->storage_class == sc_extern)
6252 scope = current_namespace;
6253 else if (!at_function_scope_p ())
6254 scope = current_scope ();
6258 && (/* If the variable is a namespace-scope variable declared in a
6259 template, we need DECL_LANG_SPECIFIC. */
6260 (TREE_CODE (scope) == NAMESPACE_DECL && processing_template_decl)
6261 /* Similarly for namespace-scope variables with language linkage
6263 || (TREE_CODE (scope) == NAMESPACE_DECL
6264 && current_lang_name != lang_name_cplusplus)
6265 /* Similarly for static data members. */
6267 decl = build_lang_decl (VAR_DECL, name, type);
6269 decl = build_decl (VAR_DECL, name, type);
6271 if (explicit_scope && TREE_CODE (explicit_scope) == NAMESPACE_DECL)
6272 set_decl_namespace (decl, explicit_scope, 0);
6274 DECL_CONTEXT (decl) = scope;
6276 if (declspecs->storage_class == sc_extern)
6278 DECL_THIS_EXTERN (decl) = 1;
6279 DECL_EXTERNAL (decl) = !initialized;
6282 if (DECL_CLASS_SCOPE_P (decl))
6284 set_linkage_for_static_data_member (decl);
6285 /* This function is only called with out-of-class definitions. */
6286 DECL_EXTERNAL (decl) = 0;
6287 check_class_member_definition_namespace (decl);
6289 /* At top level, either `static' or no s.c. makes a definition
6290 (perhaps tentative), and absence of `static' makes it public. */
6291 else if (toplevel_bindings_p ())
6293 TREE_PUBLIC (decl) = (declspecs->storage_class != sc_static
6294 && (DECL_THIS_EXTERN (decl) || ! constp));
6295 TREE_STATIC (decl) = ! DECL_EXTERNAL (decl);
6297 /* Not at top level, only `static' makes a static definition. */
6300 TREE_STATIC (decl) = declspecs->storage_class == sc_static;
6301 TREE_PUBLIC (decl) = DECL_EXTERNAL (decl);
6304 if (declspecs->specs[(int)ds_thread])
6306 if (targetm.have_tls)
6307 DECL_TLS_MODEL (decl) = decl_default_tls_model (decl);
6309 /* A mere warning is sure to result in improper semantics
6310 at runtime. Don't bother to allow this to compile. */
6311 error ("thread-local storage not supported for this target");
6314 if (TREE_PUBLIC (decl))
6316 /* [basic.link]: A name with no linkage (notably, the name of a class
6317 or enumeration declared in a local scope) shall not be used to
6318 declare an entity with linkage.
6320 Only check this for public decls for now. */
6321 tree t = no_linkage_check (TREE_TYPE (decl), /*relaxed_p=*/false);
6324 if (TYPE_ANONYMOUS_P (t))
6326 if (DECL_EXTERN_C_P (decl))
6327 /* Allow this; it's pretty common in C. */
6331 /* DRs 132, 319 and 389 seem to indicate types with
6332 no linkage can only be used to declare extern "C"
6333 entities. Since it's not always an error in the
6334 ISO C++ 90 Standard, we only issue a warning. */
6335 warning (0, "non-local variable %q#D uses anonymous type",
6337 if (DECL_ORIGINAL_TYPE (TYPE_NAME (t)))
6338 warning (0, "%q+#D does not refer to the unqualified "
6339 "type, so it is not used for linkage",
6344 warning (0, "non-local variable %q#D uses local type %qT", decl, t);
6348 DECL_INTERFACE_KNOWN (decl) = 1;
6353 /* Create and return a canonical pointer to member function type, for
6354 TYPE, which is a POINTER_TYPE to a METHOD_TYPE. */
6357 build_ptrmemfunc_type (tree type)
6361 tree unqualified_variant = NULL_TREE;
6363 if (type == error_mark_node)
6366 /* If a canonical type already exists for this type, use it. We use
6367 this method instead of type_hash_canon, because it only does a
6368 simple equality check on the list of field members. */
6370 if ((t = TYPE_GET_PTRMEMFUNC_TYPE (type)))
6373 /* Make sure that we always have the unqualified pointer-to-member
6375 if (cp_type_quals (type) != TYPE_UNQUALIFIED)
6377 = build_ptrmemfunc_type (TYPE_MAIN_VARIANT (type));
6379 t = make_aggr_type (RECORD_TYPE);
6380 xref_basetypes (t, NULL_TREE);
6382 /* Let the front-end know this is a pointer to member function... */
6383 TYPE_PTRMEMFUNC_FLAG (t) = 1;
6384 /* ... and not really an aggregate. */
6385 SET_IS_AGGR_TYPE (t, 0);
6387 field = build_decl (FIELD_DECL, pfn_identifier, type);
6390 field = build_decl (FIELD_DECL, delta_identifier, delta_type_node);
6391 TREE_CHAIN (field) = fields;
6394 finish_builtin_struct (t, "__ptrmemfunc_type", fields, ptr_type_node);
6396 /* Zap out the name so that the back-end will give us the debugging
6397 information for this anonymous RECORD_TYPE. */
6398 TYPE_NAME (t) = NULL_TREE;
6400 /* If this is not the unqualified form of this pointer-to-member
6401 type, set the TYPE_MAIN_VARIANT for this type to be the
6402 unqualified type. Since they are actually RECORD_TYPEs that are
6403 not variants of each other, we must do this manually. */
6404 if (cp_type_quals (type) != TYPE_UNQUALIFIED)
6406 t = build_qualified_type (t, cp_type_quals (type));
6407 TYPE_MAIN_VARIANT (t) = unqualified_variant;
6408 TYPE_NEXT_VARIANT (t) = TYPE_NEXT_VARIANT (unqualified_variant);
6409 TYPE_NEXT_VARIANT (unqualified_variant) = t;
6412 /* Cache this pointer-to-member type so that we can find it again
6414 TYPE_SET_PTRMEMFUNC_TYPE (type, t);
6419 /* Create and return a pointer to data member type. */
6422 build_ptrmem_type (tree class_type, tree member_type)
6424 if (TREE_CODE (member_type) == METHOD_TYPE)
6428 arg_types = TYPE_ARG_TYPES (member_type);
6429 class_type = (cp_build_qualified_type
6431 cp_type_quals (TREE_TYPE (TREE_VALUE (arg_types)))));
6433 = build_method_type_directly (class_type,
6434 TREE_TYPE (member_type),
6435 TREE_CHAIN (arg_types));
6436 return build_ptrmemfunc_type (build_pointer_type (member_type));
6440 gcc_assert (TREE_CODE (member_type) != FUNCTION_TYPE);
6441 return build_offset_type (class_type, member_type);
6445 /* DECL is a VAR_DECL defined in-class, whose TYPE is also given.
6446 Check to see that the definition is valid. Issue appropriate error
6447 messages. Return 1 if the definition is particularly bad, or 0
6451 check_static_variable_definition (tree decl, tree type)
6453 /* Motion 10 at San Diego: If a static const integral data member is
6454 initialized with an integral constant expression, the initializer
6455 may appear either in the declaration (within the class), or in
6456 the definition, but not both. If it appears in the class, the
6457 member is a member constant. The file-scope definition is always
6459 if (!ARITHMETIC_TYPE_P (type) && TREE_CODE (type) != ENUMERAL_TYPE)
6461 error ("invalid in-class initialization of static data member "
6462 "of non-integral type %qT",
6464 /* If we just return the declaration, crashes will sometimes
6465 occur. We therefore return void_type_node, as if this were a
6466 friend declaration, to cause callers to completely ignore
6467 this declaration. */
6470 else if (!CP_TYPE_CONST_P (type))
6471 error ("ISO C++ forbids in-class initialization of non-const "
6472 "static member %qD",
6474 else if (pedantic && !INTEGRAL_TYPE_P (type))
6475 pedwarn ("ISO C++ forbids initialization of member constant "
6476 "%qD of non-integral type %qT", decl, type);
6481 /* Given the SIZE (i.e., number of elements) in an array, compute an
6482 appropriate index type for the array. If non-NULL, NAME is the
6483 name of the thing being declared. */
6486 compute_array_index_type (tree name, tree size)
6491 if (error_operand_p (size))
6492 return error_mark_node;
6494 type = TREE_TYPE (size);
6495 /* The array bound must be an integer type. */
6496 if (!dependent_type_p (type) && !INTEGRAL_TYPE_P (type))
6499 error ("size of array %qD has non-integral type %qT", name, type);
6501 error ("size of array has non-integral type %qT", type);
6502 size = integer_one_node;
6503 type = TREE_TYPE (size);
6506 if (abi_version_at_least (2)
6507 /* We should only handle value dependent expressions specially. */
6508 ? value_dependent_expression_p (size)
6509 /* But for abi-1, we handled all instances in templates. This
6510 effects the manglings produced. */
6511 : processing_template_decl)
6512 return build_index_type (build_min (MINUS_EXPR, sizetype,
6513 size, integer_one_node));
6515 /* The size might be the result of a cast. */
6516 STRIP_TYPE_NOPS (size);
6518 /* It might be a const variable or enumeration constant. */
6519 size = integral_constant_value (size);
6521 /* Normally, the array-bound will be a constant. */
6522 if (TREE_CODE (size) == INTEGER_CST)
6524 /* Check to see if the array bound overflowed. Make that an
6525 error, no matter how generous we're being. */
6526 int old_flag_pedantic_errors = flag_pedantic_errors;
6527 int old_pedantic = pedantic;
6528 pedantic = flag_pedantic_errors = 1;
6529 constant_expression_warning (size);
6530 pedantic = old_pedantic;
6531 flag_pedantic_errors = old_flag_pedantic_errors;
6533 /* An array must have a positive number of elements. */
6534 if (INT_CST_LT (size, integer_zero_node))
6537 error ("size of array %qD is negative", name);
6539 error ("size of array is negative");
6540 size = integer_one_node;
6542 /* As an extension we allow zero-sized arrays. We always allow
6543 them in system headers because glibc uses them. */
6544 else if (integer_zerop (size) && pedantic && !in_system_header)
6547 pedwarn ("ISO C++ forbids zero-size array %qD", name);
6549 pedwarn ("ISO C++ forbids zero-size array");
6552 else if (TREE_CONSTANT (size))
6554 /* `(int) &fn' is not a valid array bound. */
6556 error ("size of array %qD is not an integral constant-expression",
6559 error ("size of array is not an integral constant-expression");
6560 size = integer_one_node;
6565 pedwarn ("ISO C++ forbids variable-size array %qD", name);
6567 pedwarn ("ISO C++ forbids variable-size array");
6570 if (processing_template_decl && !TREE_CONSTANT (size))
6571 /* A variable sized array. */
6572 itype = build_min (MINUS_EXPR, sizetype, size, integer_one_node);
6575 HOST_WIDE_INT saved_processing_template_decl;
6577 /* Compute the index of the largest element in the array. It is
6578 one less than the number of elements in the array. We save
6579 and restore PROCESSING_TEMPLATE_DECL so that computations in
6580 cp_build_binary_op will be appropriately folded. */
6581 saved_processing_template_decl = processing_template_decl;
6582 processing_template_decl = 0;
6583 itype = cp_build_binary_op (MINUS_EXPR,
6584 cp_convert (ssizetype, size),
6585 cp_convert (ssizetype, integer_one_node));
6586 itype = fold (itype);
6587 processing_template_decl = saved_processing_template_decl;
6589 if (!TREE_CONSTANT (itype))
6590 /* A variable sized array. */
6591 itype = variable_size (itype);
6592 /* Make sure that there was no overflow when creating to a signed
6593 index type. (For example, on a 32-bit machine, an array with
6594 size 2^32 - 1 is too big.) */
6595 else if (TREE_CODE (itype) == INTEGER_CST
6596 && TREE_OVERFLOW (itype))
6598 error ("overflow in array dimension");
6599 TREE_OVERFLOW (itype) = 0;
6603 /* Create and return the appropriate index type. */
6604 return build_index_type (itype);
6607 /* Returns the scope (if any) in which the entity declared by
6608 DECLARATOR will be located. If the entity was declared with an
6609 unqualified name, NULL_TREE is returned. */
6612 get_scope_of_declarator (const cp_declarator *declarator)
6614 while (declarator && declarator->kind != cdk_id)
6615 declarator = declarator->declarator;
6617 /* If the declarator-id is a SCOPE_REF, the scope in which the
6618 declaration occurs is the first operand. */
6620 && declarator->u.id.qualifying_scope)
6621 return declarator->u.id.qualifying_scope;
6623 /* Otherwise, the declarator is not a qualified name; the entity will
6624 be declared in the current scope. */
6628 /* Returns an ARRAY_TYPE for an array with SIZE elements of the
6629 indicated TYPE. If non-NULL, NAME is the NAME of the declaration
6633 create_array_type_for_decl (tree name, tree type, tree size)
6635 tree itype = NULL_TREE;
6636 const char* error_msg;
6638 /* If things have already gone awry, bail now. */
6639 if (type == error_mark_node || size == error_mark_node)
6640 return error_mark_node;
6642 /* Assume that everything will go OK. */
6645 /* There are some types which cannot be array elements. */
6646 switch (TREE_CODE (type))
6649 error_msg = "array of void";
6653 error_msg = "array of functions";
6656 case REFERENCE_TYPE:
6657 error_msg = "array of references";
6661 error_msg = "array of function members";
6668 /* If something went wrong, issue an error-message and return. */
6672 error ("declaration of %qD as %s", name, error_msg);
6674 error ("creating %s", error_msg);
6676 return error_mark_node;
6681 The constant expressions that specify the bounds of the arrays
6682 can be omitted only for the first member of the sequence. */
6683 if (TREE_CODE (type) == ARRAY_TYPE && !TYPE_DOMAIN (type))
6686 error ("declaration of %qD as multidimensional array must "
6687 "have bounds for all dimensions except the first",
6690 error ("multidimensional array must have bounds for all "
6691 "dimensions except the first");
6693 return error_mark_node;
6696 /* Figure out the index type for the array. */
6698 itype = compute_array_index_type (name, size);
6701 T is called the array element type; this type shall not be [...] an
6702 abstract class type. */
6703 abstract_virtuals_error (name, type);
6705 return build_cplus_array_type (type, itype);
6708 /* Check that it's OK to declare a function with the indicated TYPE.
6709 SFK indicates the kind of special function (if any) that this
6710 function is. OPTYPE is the type given in a conversion operator
6711 declaration, or the class type for a constructor/destructor.
6712 Returns the actual return type of the function; that
6713 may be different than TYPE if an error occurs, or for certain
6714 special functions. */
6717 check_special_function_return_type (special_function_kind sfk,
6723 case sfk_constructor:
6725 error ("return type specification for constructor invalid");
6727 if (targetm.cxx.cdtor_returns_this () && !TYPE_FOR_JAVA (optype))
6728 type = build_pointer_type (optype);
6730 type = void_type_node;
6733 case sfk_destructor:
6735 error ("return type specification for destructor invalid");
6736 /* We can't use the proper return type here because we run into
6737 problems with ambiguous bases and covariant returns.
6738 Java classes are left unchanged because (void *) isn't a valid
6739 Java type, and we don't want to change the Java ABI. */
6740 if (targetm.cxx.cdtor_returns_this () && !TYPE_FOR_JAVA (optype))
6741 type = build_pointer_type (void_type_node);
6743 type = void_type_node;
6746 case sfk_conversion:
6747 if (type && !same_type_p (type, optype))
6748 error ("operator %qT declared to return %qT", optype, type);
6750 pedwarn ("return type specified for %<operator %T%>", optype);
6761 /* A variable or data member (whose unqualified name is IDENTIFIER)
6762 has been declared with the indicated TYPE. If the TYPE is not
6763 acceptable, issue an error message and return a type to use for
6764 error-recovery purposes. */
6767 check_var_type (tree identifier, tree type)
6769 if (VOID_TYPE_P (type))
6772 error ("unnamed variable or field declared void");
6773 else if (TREE_CODE (identifier) == IDENTIFIER_NODE)
6775 gcc_assert (!IDENTIFIER_OPNAME_P (identifier));
6776 error ("variable or field %qE declared void", identifier);
6779 error ("variable or field declared void");
6780 type = integer_type_node;
6786 /* Given declspecs and a declarator (abstract or otherwise), determine
6787 the name and type of the object declared and construct a DECL node
6790 DECLSPECS is a chain of tree_list nodes whose value fields
6791 are the storage classes and type specifiers.
6793 DECL_CONTEXT says which syntactic context this declaration is in:
6794 NORMAL for most contexts. Make a VAR_DECL or FUNCTION_DECL or TYPE_DECL.
6795 FUNCDEF for a function definition. Like NORMAL but a few different
6796 error messages in each case. Return value may be zero meaning
6797 this definition is too screwy to try to parse.
6798 MEMFUNCDEF for a function definition. Like FUNCDEF but prepares to
6799 handle member functions (which have FIELD context).
6800 Return value may be zero meaning this definition is too screwy to
6802 PARM for a parameter declaration (either within a function prototype
6803 or before a function body). Make a PARM_DECL, or return void_type_node.
6804 CATCHPARM for a parameter declaration before a catch clause.
6805 TYPENAME if for a typename (in a cast or sizeof).
6806 Don't make a DECL node; just return the ..._TYPE node.
6807 FIELD for a struct or union field; make a FIELD_DECL.
6808 BITFIELD for a field with specified width.
6809 INITIALIZED is 1 if the decl has an initializer.
6811 ATTRLIST is a pointer to the list of attributes, which may be NULL
6812 if there are none; *ATTRLIST may be modified if attributes from inside
6813 the declarator should be applied to the declaration.
6815 When this function is called, scoping variables (such as
6816 CURRENT_CLASS_TYPE) should reflect the scope in which the
6817 declaration occurs, not the scope in which the new declaration will
6818 be placed. For example, on:
6822 when grokdeclarator is called for `S::f', the CURRENT_CLASS_TYPE
6825 Returns a DECL (if a declarator is present), a TYPE (if there is no
6826 declarator, in cases like "struct S;"), or the ERROR_MARK_NODE if an
6830 grokdeclarator (const cp_declarator *declarator,
6831 const cp_decl_specifier_seq *declspecs,
6832 enum decl_context decl_context,
6836 tree type = NULL_TREE;
6838 int virtualp, explicitp, friendp, inlinep, staticp;
6839 int explicit_int = 0;
6840 int explicit_char = 0;
6841 int defaulted_int = 0;
6842 tree dependent_name = NULL_TREE;
6844 tree typedef_decl = NULL_TREE;
6845 const char *name = NULL;
6846 tree typedef_type = NULL_TREE;
6847 /* True if this declarator is a function definition. */
6848 bool funcdef_flag = false;
6849 cp_declarator_kind innermost_code = cdk_error;
6852 /* See the code below that used this. */
6853 tree decl_attr = NULL_TREE;
6856 /* Keep track of what sort of function is being processed
6857 so that we can warn about default return values, or explicit
6858 return values which do not match prescribed defaults. */
6859 special_function_kind sfk = sfk_none;
6861 tree dname = NULL_TREE;
6862 tree ctor_return_type = NULL_TREE;
6863 enum overload_flags flags = NO_SPECIAL;
6864 /* cv-qualifiers that apply to the declarator, for a declaration of
6865 a member function. */
6866 cp_cv_quals memfn_quals = TYPE_UNQUALIFIED;
6867 /* cv-qualifiers that apply to the type specified by the DECLSPECS. */
6869 tree raises = NULL_TREE;
6870 int template_count = 0;
6871 tree returned_attrs = NULL_TREE;
6872 tree parms = NULL_TREE;
6873 const cp_declarator *id_declarator;
6874 /* The unqualified name of the declarator; either an
6875 IDENTIFIER_NODE, BIT_NOT_EXPR, or TEMPLATE_ID_EXPR. */
6876 tree unqualified_id;
6877 /* The class type, if any, in which this entity is located,
6878 or NULL_TREE if none. Note that this value may be different from
6879 the current class type; for example if an attempt is made to declare
6880 "A::f" inside "B", this value will be "A". */
6881 tree ctype = current_class_type;
6882 /* The NAMESPACE_DECL for the namespace in which this entity is
6883 located. If an unqualified name is used to declare the entity,
6884 this value will be NULL_TREE, even if the entity is located at
6886 tree in_namespace = NULL_TREE;
6887 cp_storage_class storage_class;
6888 bool unsigned_p, signed_p, short_p, long_p, thread_p;
6889 bool type_was_error_mark_node = false;
6891 signed_p = declspecs->specs[(int)ds_signed];
6892 unsigned_p = declspecs->specs[(int)ds_unsigned];
6893 short_p = declspecs->specs[(int)ds_short];
6894 long_p = declspecs->specs[(int)ds_long];
6895 longlong = declspecs->specs[(int)ds_long] >= 2;
6896 thread_p = declspecs->specs[(int)ds_thread];
6898 if (decl_context == FUNCDEF)
6899 funcdef_flag = true, decl_context = NORMAL;
6900 else if (decl_context == MEMFUNCDEF)
6901 funcdef_flag = true, decl_context = FIELD;
6902 else if (decl_context == BITFIELD)
6903 bitfield = 1, decl_context = FIELD;
6905 /* Look inside a declarator for the name being declared
6906 and get it as a string, for an error message. */
6907 for (id_declarator = declarator;
6909 id_declarator = id_declarator->declarator)
6911 if (id_declarator->kind != cdk_id)
6912 innermost_code = id_declarator->kind;
6914 switch (id_declarator->kind)
6917 if (id_declarator->declarator
6918 && id_declarator->declarator->kind == cdk_id)
6920 sfk = id_declarator->declarator->u.id.sfk;
6921 if (sfk == sfk_destructor)
6928 tree qualifying_scope = id_declarator->u.id.qualifying_scope;
6929 tree decl = id_declarator->u.id.unqualified_name;
6932 if (qualifying_scope)
6934 if (TYPE_P (qualifying_scope))
6936 ctype = qualifying_scope;
6937 if (innermost_code != cdk_function
6938 && current_class_type
6939 && !UNIQUELY_DERIVED_FROM_P (ctype,
6940 current_class_type))
6942 error ("type %qT is not derived from type %qT",
6943 ctype, current_class_type);
6944 return error_mark_node;
6947 else if (TREE_CODE (qualifying_scope) == NAMESPACE_DECL)
6948 in_namespace = qualifying_scope;
6950 switch (TREE_CODE (decl))
6956 if (innermost_code != cdk_function)
6958 error ("declaration of %qD as non-function", decl);
6959 return error_mark_node;
6961 else if (!qualifying_scope
6962 && !(current_class_type && at_class_scope_p ()))
6964 error ("declaration of %qD as non-member", decl);
6965 return error_mark_node;
6968 type = TREE_OPERAND (decl, 0);
6969 name = IDENTIFIER_POINTER (constructor_name (type));
6974 case TEMPLATE_ID_EXPR:
6976 tree fns = TREE_OPERAND (decl, 0);
6979 if (TREE_CODE (dname) == COMPONENT_REF)
6980 dname = TREE_OPERAND (dname, 1);
6981 if (TREE_CODE (dname) != IDENTIFIER_NODE)
6983 gcc_assert (is_overloaded_fn (dname));
6984 dname = DECL_NAME (get_first_fn (dname));
6989 case IDENTIFIER_NODE:
6990 if (TREE_CODE (decl) == IDENTIFIER_NODE)
6993 if (C_IS_RESERVED_WORD (dname))
6995 error ("declarator-id missing; using reserved word %qD",
6997 name = IDENTIFIER_POINTER (dname);
6999 else if (!IDENTIFIER_TYPENAME_P (dname))
7000 name = IDENTIFIER_POINTER (dname);
7003 gcc_assert (flags == NO_SPECIAL);
7004 flags = TYPENAME_FLAG;
7005 ctor_return_type = TREE_TYPE (dname);
7006 sfk = sfk_conversion;
7007 if (is_typename_at_global_scope (dname))
7008 name = IDENTIFIER_POINTER (dname);
7010 name = "<invalid operator>";
7026 return error_mark_node;
7032 if (id_declarator->kind == cdk_id)
7038 The declarator in a function-definition shall have the form
7039 D1 ( parameter-declaration-clause) ... */
7040 if (funcdef_flag && innermost_code != cdk_function)
7042 error ("function definition does not declare parameters");
7043 return error_mark_node;
7046 if (((dname && IDENTIFIER_OPNAME_P (dname)) || flags == TYPENAME_FLAG)
7047 && innermost_code != cdk_function
7048 && ! (ctype && !declspecs->any_specifiers_p))
7050 error ("declaration of %qD as non-function", dname);
7051 return error_mark_node;
7054 /* Anything declared one level down from the top level
7055 must be one of the parameters of a function
7056 (because the body is at least two levels down). */
7058 /* This heuristic cannot be applied to C++ nodes! Fixed, however,
7059 by not allowing C++ class definitions to specify their parameters
7060 with xdecls (must be spec.d in the parmlist).
7062 Since we now wait to push a class scope until we are sure that
7063 we are in a legitimate method context, we must set oldcname
7064 explicitly (since current_class_name is not yet alive).
7066 We also want to avoid calling this a PARM if it is in a namespace. */
7068 if (decl_context == NORMAL && !toplevel_bindings_p ())
7070 struct cp_binding_level *b = current_binding_level;
7071 current_binding_level = b->level_chain;
7072 if (current_binding_level != 0 && toplevel_bindings_p ())
7073 decl_context = PARM;
7074 current_binding_level = b;
7078 name = decl_context == PARM ? "parameter" : "type name";
7080 /* If there were multiple types specified in the decl-specifier-seq,
7081 issue an error message. */
7082 if (declspecs->multiple_types_p)
7083 error ("two or more data types in declaration of %qs", name);
7084 /* Extract the basic type from the decl-specifier-seq. */
7085 type = declspecs->type;
7086 if (type == error_mark_node)
7089 type_was_error_mark_node = true;
7091 /* If the entire declaration is itself tagged as deprecated then
7092 suppress reports of deprecated items. */
7093 if (type && TREE_DEPRECATED (type)
7094 && deprecated_state != DEPRECATED_SUPPRESS)
7095 warn_deprecated_use (type);
7096 if (type && TREE_CODE (type) == TYPE_DECL)
7098 typedef_decl = type;
7099 type = TREE_TYPE (typedef_decl);
7101 /* No type at all: default to `int', and set DEFAULTED_INT
7102 because it was not a user-defined typedef. */
7103 if (type == NULL_TREE && (signed_p || unsigned_p || long_p || short_p))
7105 /* These imply 'int'. */
7106 type = integer_type_node;
7110 explicit_int = declspecs->explicit_int_p;
7111 explicit_char = declspecs->explicit_char_p;
7114 /* See the code below that used this. */
7116 decl_attr = DECL_ATTRIBUTES (typedef_decl);
7118 typedef_type = type;
7121 if (sfk != sfk_conversion)
7122 ctor_return_type = ctype;
7124 if (sfk != sfk_none)
7125 type = check_special_function_return_type (sfk, type,
7127 else if (type == NULL_TREE)
7133 /* We handle `main' specially here, because 'main () { }' is so
7134 common. With no options, it is allowed. With -Wreturn-type,
7135 it is a warning. It is only an error with -pedantic-errors. */
7136 is_main = (funcdef_flag
7137 && dname && MAIN_NAME_P (dname)
7138 && ctype == NULL_TREE
7139 && in_namespace == NULL_TREE
7140 && current_namespace == global_namespace);
7142 if (type_was_error_mark_node)
7143 /* We've already issued an error, don't complain more. */;
7144 else if (in_system_header || flag_ms_extensions)
7145 /* Allow it, sigh. */;
7146 else if (pedantic || ! is_main)
7147 pedwarn ("ISO C++ forbids declaration of %qs with no type", name);
7148 else if (warn_return_type)
7149 warning (0, "ISO C++ forbids declaration of %qs with no type", name);
7151 type = integer_type_node;
7156 /* Now process the modifiers that were specified
7157 and check for invalid combinations. */
7159 /* Long double is a special combination. */
7160 if (long_p && !longlong && TYPE_MAIN_VARIANT (type) == double_type_node)
7163 type = build_qualified_type (long_double_type_node,
7164 cp_type_quals (type));
7167 /* Check all other uses of type modifiers. */
7169 if (unsigned_p || signed_p || long_p || short_p)
7173 if ((signed_p || unsigned_p) && TREE_CODE (type) != INTEGER_TYPE)
7174 error ("%<signed%> or %<unsigned%> invalid for %qs", name);
7175 else if (signed_p && unsigned_p)
7176 error ("%<signed%> and %<unsigned%> specified together for %qs", name);
7177 else if (longlong && TREE_CODE (type) != INTEGER_TYPE)
7178 error ("%<long long%> invalid for %qs", name);
7179 else if (long_p && TREE_CODE (type) == REAL_TYPE)
7180 error ("%<long%> invalid for %qs", name);
7181 else if (short_p && TREE_CODE (type) == REAL_TYPE)
7182 error ("%<short%> invalid for %qs", name);
7183 else if ((long_p || short_p) && explicit_char)
7184 error ("%<long%> or %<short%> specified with char for %qs", name);
7185 else if (long_p && short_p)
7186 error ("%<long%> and %<short%> specified together for %qs", name);
7190 if (!explicit_int && !defaulted_int && !explicit_char && pedantic)
7192 pedwarn ("long, short, signed or unsigned used invalidly for %qs",
7194 if (flag_pedantic_errors)
7199 /* Discard the type modifiers if they are invalid. */
7210 /* Decide whether an integer type is signed or not.
7211 Optionally treat bitfields as signed by default. */
7215 It is implementation-defined whether a plain (neither
7216 explicitly signed or unsigned) char, short, int, or long
7217 bit-field is signed or unsigned.
7219 Naturally, we extend this to long long as well. Note that
7220 this does not include wchar_t. */
7221 || (bitfield && !flag_signed_bitfields
7223 /* A typedef for plain `int' without `signed' can be
7224 controlled just like plain `int', but a typedef for
7225 `signed int' cannot be so controlled. */
7227 && C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl))
7228 && TREE_CODE (type) == INTEGER_TYPE
7229 && !same_type_p (TYPE_MAIN_VARIANT (type), wchar_type_node)))
7232 type = long_long_unsigned_type_node;
7234 type = long_unsigned_type_node;
7236 type = short_unsigned_type_node;
7237 else if (type == char_type_node)
7238 type = unsigned_char_type_node;
7239 else if (typedef_decl)
7240 type = c_common_unsigned_type (type);
7242 type = unsigned_type_node;
7244 else if (signed_p && type == char_type_node)
7245 type = signed_char_type_node;
7247 type = long_long_integer_type_node;
7249 type = long_integer_type_node;
7251 type = short_integer_type_node;
7253 if (declspecs->specs[(int)ds_complex])
7255 if (TREE_CODE (type) != INTEGER_TYPE && TREE_CODE (type) != REAL_TYPE)
7256 error ("complex invalid for %qs", name);
7257 /* If we just have "complex", it is equivalent to
7258 "complex double", but if any modifiers at all are specified it is
7259 the complex form of TYPE. E.g, "complex short" is
7260 "complex short int". */
7262 else if (defaulted_int && ! longlong
7263 && ! (long_p || short_p || signed_p || unsigned_p))
7264 type = complex_double_type_node;
7265 else if (type == integer_type_node)
7266 type = complex_integer_type_node;
7267 else if (type == float_type_node)
7268 type = complex_float_type_node;
7269 else if (type == double_type_node)
7270 type = complex_double_type_node;
7271 else if (type == long_double_type_node)
7272 type = complex_long_double_type_node;
7274 type = build_complex_type (type);
7277 type_quals = TYPE_UNQUALIFIED;
7278 if (declspecs->specs[(int)ds_const])
7279 type_quals |= TYPE_QUAL_CONST;
7280 if (declspecs->specs[(int)ds_volatile])
7281 type_quals |= TYPE_QUAL_VOLATILE;
7282 if (declspecs->specs[(int)ds_restrict])
7283 type_quals |= TYPE_QUAL_RESTRICT;
7284 if (sfk == sfk_conversion && type_quals != TYPE_UNQUALIFIED)
7285 error ("qualifiers are not allowed on declaration of %<operator %T%>",
7288 if (TREE_CODE (type) == FUNCTION_TYPE
7289 && type_quals != TYPE_UNQUALIFIED)
7291 /* This was an error in C++98 (cv-qualifiers cannot be added to
7292 a function type), but DR 295 makes the code well-formed by
7293 dropping the extra qualifiers. */
7296 tree bad_type = build_qualified_type (type, type_quals);
7297 pedwarn ("ignoring %qV qualifiers added to function type %qT",
7300 type_quals = TYPE_UNQUALIFIED;
7302 type_quals |= cp_type_quals (type);
7303 type = cp_build_qualified_type_real
7304 (type, type_quals, ((typedef_decl && !DECL_ARTIFICIAL (typedef_decl)
7305 ? tf_ignore_bad_quals : 0) | tf_warning_or_error));
7306 /* We might have ignored or rejected some of the qualifiers. */
7307 type_quals = cp_type_quals (type);
7310 inlinep = !! declspecs->specs[(int)ds_inline];
7311 virtualp = !! declspecs->specs[(int)ds_virtual];
7312 explicitp = !! declspecs->specs[(int)ds_explicit];
7314 storage_class = declspecs->storage_class;
7315 if (storage_class == sc_static)
7316 staticp = 1 + (decl_context == FIELD);
7318 if (virtualp && staticp == 2)
7320 error ("member %qD cannot be declared both virtual and static", dname);
7321 storage_class = sc_none;
7324 friendp = !! declspecs->specs[(int)ds_friend];
7326 if (dependent_name && !friendp)
7328 error ("%<%T::%D%> is not a valid declarator", ctype, dependent_name);
7329 return error_mark_node;
7332 /* Issue errors about use of storage classes for parameters. */
7333 if (decl_context == PARM)
7335 if (declspecs->specs[(int)ds_typedef])
7336 error ("typedef declaration invalid in parameter declaration");
7337 else if (storage_class == sc_static
7338 || storage_class == sc_extern
7340 error ("storage class specifiers invalid in parameter declarations");
7343 /* Give error if `virtual' is used outside of class declaration. */
7345 && (current_class_name == NULL_TREE || decl_context != FIELD))
7347 error ("virtual outside class declaration");
7351 /* Static anonymous unions are dealt with here. */
7352 if (staticp && decl_context == TYPENAME
7354 && ANON_AGGR_TYPE_P (declspecs->type))
7355 decl_context = FIELD;
7357 /* Warn about storage classes that are invalid for certain
7358 kinds of declarations (parameters, typenames, etc.). */
7359 if (declspecs->multiple_storage_classes_p)
7361 error ("multiple storage classes in declaration of %qs", name);
7362 storage_class = sc_none;
7366 && storage_class != sc_extern
7367 && storage_class != sc_static)
7368 || declspecs->specs[(int)ds_typedef]))
7370 error ("multiple storage classes in declaration of %qs", name);
7373 else if (decl_context != NORMAL
7374 && ((storage_class != sc_none
7375 && storage_class != sc_mutable)
7378 if ((decl_context == PARM || decl_context == CATCHPARM)
7379 && (storage_class == sc_register
7380 || storage_class == sc_auto))
7382 else if (declspecs->specs[(int)ds_typedef])
7384 else if (decl_context == FIELD
7385 /* C++ allows static class elements. */
7386 && storage_class == sc_static)
7387 /* C++ also allows inlines and signed and unsigned elements,
7388 but in those cases we don't come in here. */
7392 if (decl_context == FIELD)
7393 error ("storage class specified for %qs", name);
7396 if (decl_context == PARM || decl_context == CATCHPARM)
7397 error ("storage class specified for parameter %qs", name);
7399 error ("storage class specified for typename");
7401 if (storage_class == sc_register
7402 || storage_class == sc_auto
7403 || storage_class == sc_extern
7405 storage_class = sc_none;
7408 else if (storage_class == sc_extern && initialized
7411 if (toplevel_bindings_p ())
7413 /* It's common practice (and completely valid) to have a const
7414 be initialized and declared extern. */
7415 if (!(type_quals & TYPE_QUAL_CONST))
7416 warning (0, "%qs initialized and declared %<extern%>", name);
7419 error ("%qs has both %<extern%> and initializer", name);
7421 else if (storage_class == sc_extern && funcdef_flag
7422 && ! toplevel_bindings_p ())
7423 error ("nested function %qs declared %<extern%>", name);
7424 else if (toplevel_bindings_p ())
7426 if (storage_class == sc_auto)
7427 error ("top-level declaration of %qs specifies %<auto%>", name);
7430 && storage_class != sc_extern
7431 && storage_class != sc_static)
7433 error ("function-scope %qs implicitly auto and declared %<__thread%>",
7438 if (storage_class && friendp)
7439 error ("storage class specifiers invalid in friend function declarations");
7442 unqualified_id = NULL_TREE;
7445 unqualified_id = id_declarator->u.id.unqualified_name;
7446 switch (TREE_CODE (unqualified_id))
7450 = constructor_name (TREE_OPERAND (unqualified_id, 0));
7453 case IDENTIFIER_NODE:
7454 case TEMPLATE_ID_EXPR:
7462 /* Determine the type of the entity declared by recurring on the
7464 for (; declarator; declarator = declarator->declarator)
7466 const cp_declarator *inner_declarator;
7469 if (type == error_mark_node)
7470 return error_mark_node;
7472 attrs = declarator->attributes;
7478 if (declarator == NULL || declarator->kind == cdk_id)
7479 attr_flags |= (int) ATTR_FLAG_DECL_NEXT;
7480 if (declarator->kind == cdk_function)
7481 attr_flags |= (int) ATTR_FLAG_FUNCTION_NEXT;
7482 if (declarator->kind == cdk_array)
7483 attr_flags |= (int) ATTR_FLAG_ARRAY_NEXT;
7484 returned_attrs = decl_attributes (&type,
7485 chainon (returned_attrs, attrs),
7489 if (declarator->kind == cdk_id)
7492 inner_declarator = declarator->declarator;
7494 switch (declarator->kind)
7497 type = create_array_type_for_decl (dname, type,
7498 declarator->u.array.bounds);
7506 /* Declaring a function type.
7507 Make sure we have a valid type for the function to return. */
7509 /* We now know that the TYPE_QUALS don't apply to the
7510 decl, but to its return type. */
7511 type_quals = TYPE_UNQUALIFIED;
7513 /* Warn about some types functions can't return. */
7515 if (TREE_CODE (type) == FUNCTION_TYPE)
7517 error ("%qs declared as function returning a function", name);
7518 type = integer_type_node;
7520 if (TREE_CODE (type) == ARRAY_TYPE)
7522 error ("%qs declared as function returning an array", name);
7523 type = integer_type_node;
7526 /* Pick up type qualifiers which should be applied to `this'. */
7527 memfn_quals = declarator->u.function.qualifiers;
7529 /* Pick up the exception specifications. */
7530 raises = declarator->u.function.exception_specification;
7532 /* Say it's a definition only for the CALL_EXPR
7533 closest to the identifier. */
7534 funcdecl_p = inner_declarator && inner_declarator->kind == cdk_id;
7536 if (ctype == NULL_TREE
7537 && decl_context == FIELD
7539 && (friendp == 0 || dname == current_class_name))
7540 ctype = current_class_type;
7542 if (ctype && (sfk == sfk_constructor
7543 || sfk == sfk_destructor))
7545 /* We are within a class's scope. If our declarator name
7546 is the same as the class name, and we are defining
7547 a function, then it is a constructor/destructor, and
7548 therefore returns a void type. */
7550 /* ISO C++ 12.4/2. A destructor may not be declared
7551 const or volatile. A destructor may not be
7554 ISO C++ 12.1. A constructor may not be declared
7555 const or volatile. A constructor may not be
7556 virtual. A constructor may not be static. */
7558 error ((flags == DTOR_FLAG)
7559 ? "destructor cannot be static member function"
7560 : "constructor cannot be static member function");
7563 error ((flags == DTOR_FLAG)
7564 ? "destructors may not be cv-qualified"
7565 : "constructors may not be cv-qualified");
7566 memfn_quals = TYPE_UNQUALIFIED;
7569 if (decl_context == FIELD
7570 && !member_function_or_else (ctype,
7573 return error_mark_node;
7575 if (flags != DTOR_FLAG)
7577 /* It's a constructor. */
7582 pedwarn ("constructors cannot be declared virtual");
7585 if (decl_context == FIELD
7586 && sfk != sfk_constructor)
7587 return error_mark_node;
7589 if (decl_context == FIELD)
7595 error ("can't initialize friend function %qs", name);
7598 /* Cannot be both friend and virtual. */
7599 error ("virtual functions cannot be friends");
7602 if (decl_context == NORMAL)
7603 error ("friend declaration not in class definition");
7604 if (current_function_decl && funcdef_flag)
7605 error ("can't define friend function %qs in a local "
7610 arg_types = grokparms (declarator->u.function.parameters,
7613 if (inner_declarator
7614 && inner_declarator->kind == cdk_id
7615 && inner_declarator->u.id.sfk == sfk_destructor
7616 && arg_types != void_list_node)
7618 error ("destructors may not have parameters");
7619 arg_types = void_list_node;
7623 type = build_function_type (type, arg_types);
7630 /* Filter out pointers-to-references and references-to-references.
7631 We can get these if a TYPE_DECL is used. */
7633 if (TREE_CODE (type) == REFERENCE_TYPE)
7635 error (declarator->kind == cdk_reference
7636 ? "cannot declare reference to %q#T"
7637 : "cannot declare pointer to %q#T", type);
7638 type = TREE_TYPE (type);
7640 else if (VOID_TYPE_P (type))
7642 if (declarator->kind == cdk_reference)
7643 error ("cannot declare reference to %q#T", type);
7644 else if (declarator->kind == cdk_ptrmem)
7645 error ("cannot declare pointer to %q#T member", type);
7648 /* We now know that the TYPE_QUALS don't apply to the decl,
7649 but to the target of the pointer. */
7650 type_quals = TYPE_UNQUALIFIED;
7652 if (declarator->kind == cdk_ptrmem
7653 && (TREE_CODE (type) == FUNCTION_TYPE || memfn_quals))
7655 memfn_quals |= cp_type_quals (type);
7656 type = build_memfn_type (type,
7657 declarator->u.pointer.class_type,
7659 memfn_quals = TYPE_UNQUALIFIED;
7662 if (declarator->kind == cdk_reference)
7664 if (!VOID_TYPE_P (type))
7665 type = build_reference_type (type);
7667 else if (TREE_CODE (type) == METHOD_TYPE)
7668 type = build_ptrmemfunc_type (build_pointer_type (type));
7669 else if (declarator->kind == cdk_ptrmem)
7671 gcc_assert (TREE_CODE (declarator->u.pointer.class_type)
7673 if (declarator->u.pointer.class_type == error_mark_node)
7674 /* We will already have complained. */
7675 type = error_mark_node;
7677 type = build_ptrmem_type (declarator->u.pointer.class_type,
7681 type = build_pointer_type (type);
7683 /* Process a list of type modifier keywords (such as
7684 const or volatile) that were given inside the `*' or `&'. */
7686 if (declarator->u.pointer.qualifiers)
7689 = cp_build_qualified_type (type,
7690 declarator->u.pointer.qualifiers);
7691 type_quals = cp_type_quals (type);
7704 if (unqualified_id && TREE_CODE (unqualified_id) == TEMPLATE_ID_EXPR
7705 && TREE_CODE (type) != FUNCTION_TYPE
7706 && TREE_CODE (type) != METHOD_TYPE)
7708 error ("template-id %qD used as a declarator",
7710 unqualified_id = dname;
7713 /* If TYPE is a FUNCTION_TYPE, but the function name was explicitly
7714 qualified with a class-name, turn it into a METHOD_TYPE, unless
7715 we know that the function is static. We take advantage of this
7716 opportunity to do other processing that pertains to entities
7717 explicitly declared to be class members. Note that if DECLARATOR
7718 is non-NULL, we know it is a cdk_id declarator; otherwise, we
7719 would not have exited the loop above. */
7721 && declarator->u.id.qualifying_scope
7722 && TYPE_P (declarator->u.id.qualifying_scope))
7726 ctype = declarator->u.id.qualifying_scope;
7727 ctype = TYPE_MAIN_VARIANT (ctype);
7729 while (t != NULL_TREE && CLASS_TYPE_P (t))
7731 /* You're supposed to have one `template <...>' for every
7732 template class, but you don't need one for a full
7733 specialization. For example:
7735 template <class T> struct S{};
7736 template <> struct S<int> { void f(); };
7737 void S<int>::f () {}
7739 is correct; there shouldn't be a `template <>' for the
7740 definition of `S<int>::f'. */
7741 if (CLASSTYPE_TEMPLATE_SPECIALIZATION (t)
7742 && !any_dependent_template_arguments_p (CLASSTYPE_TI_ARGS (t)))
7743 /* T is an explicit (not partial) specialization. All
7744 containing classes must therefore also be explicitly
7747 if ((CLASSTYPE_USE_TEMPLATE (t) || CLASSTYPE_IS_TEMPLATE (t))
7748 && PRIMARY_TEMPLATE_P (CLASSTYPE_TI_TEMPLATE (t)))
7749 template_count += 1;
7751 t = TYPE_MAIN_DECL (t);
7752 t = DECL_CONTEXT (t);
7755 if (ctype == current_class_type)
7758 pedwarn ("member functions are implicitly friends of their class");
7760 pedwarn ("extra qualification %<%T::%> on member %qs",
7763 else if (/* If the qualifying type is already complete, then we
7764 can skip the following checks. */
7765 !COMPLETE_TYPE_P (ctype)
7766 && (/* If the function is being defined, then
7767 qualifying type must certainly be complete. */
7769 /* A friend declaration of "T::f" is OK, even if
7770 "T" is a template parameter. But, if this
7771 function is not a friend, the qualifying type
7773 || (!friendp && !CLASS_TYPE_P (ctype))
7774 /* For a declaration, the type need not be
7775 complete, if either it is dependent (since there
7776 is no meaningful definition of complete in that
7777 case) or the qualifying class is currently being
7779 || !(dependent_type_p (ctype)
7780 || currently_open_class (ctype)))
7781 /* Check that the qualifying type is complete. */
7782 && !complete_type_or_else (ctype, NULL_TREE))
7783 return error_mark_node;
7784 else if (TREE_CODE (type) == FUNCTION_TYPE)
7786 tree sname = declarator->u.id.unqualified_name;
7788 if (current_class_type
7789 && (!friendp || funcdef_flag))
7792 ? "cannot define member function %<%T::%s%> within %<%T%>"
7793 : "cannot declare member function %<%T::%s%> within %<%T%>",
7794 ctype, name, current_class_type);
7795 return error_mark_node;
7798 if (TREE_CODE (sname) == IDENTIFIER_NODE
7799 && NEW_DELETE_OPNAME_P (sname))
7800 /* Overloaded operator new and operator delete
7801 are always static functions. */
7804 type = build_memfn_type (type, ctype, memfn_quals);
7806 else if (declspecs->specs[(int)ds_typedef]
7807 && current_class_type)
7809 error ("cannot declare member %<%T::%s%> within %qT",
7810 ctype, name, current_class_type);
7811 return error_mark_node;
7815 /* Now TYPE has the actual type. */
7820 *attrlist = chainon (returned_attrs, *attrlist);
7822 attrlist = &returned_attrs;
7825 /* Did array size calculations overflow? */
7827 if (TREE_CODE (type) == ARRAY_TYPE
7828 && COMPLETE_TYPE_P (type)
7829 && TREE_CODE (TYPE_SIZE_UNIT (type)) == INTEGER_CST
7830 && TREE_OVERFLOW (TYPE_SIZE_UNIT (type)))
7832 error ("size of array %qs is too large", name);
7833 /* If we proceed with the array type as it is, we'll eventually
7834 crash in tree_low_cst(). */
7835 type = error_mark_node;
7838 if ((decl_context == FIELD || decl_context == PARM)
7839 && !processing_template_decl
7840 && variably_modified_type_p (type, NULL_TREE))
7842 if (decl_context == FIELD)
7843 error ("data member may not have variably modified type %qT", type);
7845 error ("parameter may not have variably modified type %qT", type);
7846 type = error_mark_node;
7849 if (explicitp == 1 || (explicitp && friendp))
7851 /* [dcl.fct.spec] The explicit specifier shall only be used in
7852 declarations of constructors within a class definition. */
7853 error ("only declarations of constructors can be %<explicit%>");
7857 if (storage_class == sc_mutable)
7859 if (decl_context != FIELD || friendp)
7861 error ("non-member %qs cannot be declared %<mutable%>", name);
7862 storage_class = sc_none;
7864 else if (decl_context == TYPENAME || declspecs->specs[(int)ds_typedef])
7866 error ("non-object member %qs cannot be declared %<mutable%>", name);
7867 storage_class = sc_none;
7869 else if (TREE_CODE (type) == FUNCTION_TYPE
7870 || TREE_CODE (type) == METHOD_TYPE)
7872 error ("function %qs cannot be declared %<mutable%>", name);
7873 storage_class = sc_none;
7877 error ("static %qs cannot be declared %<mutable%>", name);
7878 storage_class = sc_none;
7880 else if (type_quals & TYPE_QUAL_CONST)
7882 error ("const %qs cannot be declared %<mutable%>", name);
7883 storage_class = sc_none;
7887 /* If this is declaring a typedef name, return a TYPE_DECL. */
7888 if (declspecs->specs[(int)ds_typedef] && decl_context != TYPENAME)
7892 /* Note that the grammar rejects storage classes
7893 in typenames, fields or parameters. */
7894 if (current_lang_name == lang_name_java)
7895 TYPE_FOR_JAVA (type) = 1;
7897 /* This declaration:
7899 typedef void f(int) const;
7901 declares a function type which is not a member of any
7902 particular class, but which is cv-qualified; for
7903 example "f S::*" declares a pointer to a const-qualified
7904 member function of S. We record the cv-qualification in the
7906 if (memfn_quals && TREE_CODE (type) == FUNCTION_TYPE)
7907 type = cp_build_qualified_type (type, memfn_quals);
7909 if (decl_context == FIELD)
7910 decl = build_lang_decl (TYPE_DECL, unqualified_id, type);
7912 decl = build_decl (TYPE_DECL, unqualified_id, type);
7913 if (id_declarator && declarator->u.id.qualifying_scope)
7914 error ("%Jtypedef name may not be a nested-name-specifier", decl);
7916 if (decl_context != FIELD)
7918 if (!current_function_decl)
7919 DECL_CONTEXT (decl) = FROB_CONTEXT (current_namespace);
7920 else if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (current_function_decl)
7921 || (DECL_MAYBE_IN_CHARGE_DESTRUCTOR_P
7922 (current_function_decl)))
7923 /* The TYPE_DECL is "abstract" because there will be
7924 clones of this constructor/destructor, and there will
7925 be copies of this TYPE_DECL generated in those
7927 DECL_ABSTRACT (decl) = 1;
7929 else if (constructor_name_p (unqualified_id, current_class_type))
7930 pedwarn ("ISO C++ forbids nested type %qD with same name "
7931 "as enclosing class",
7934 /* If the user declares "typedef struct {...} foo" then the
7935 struct will have an anonymous name. Fill that name in now.
7936 Nothing can refer to it, so nothing needs know about the name
7938 if (type != error_mark_node
7941 && TREE_CODE (TYPE_NAME (type)) == TYPE_DECL
7942 && TYPE_ANONYMOUS_P (type)
7943 /* Don't do this if there are attributes. */
7944 && (!attrlist || !*attrlist)
7945 && cp_type_quals (type) == TYPE_UNQUALIFIED)
7947 tree oldname = TYPE_NAME (type);
7950 /* Replace the anonymous name with the real name everywhere. */
7951 for (t = TYPE_MAIN_VARIANT (type); t; t = TYPE_NEXT_VARIANT (t))
7952 if (TYPE_NAME (t) == oldname)
7953 TYPE_NAME (t) = decl;
7955 if (TYPE_LANG_SPECIFIC (type))
7956 TYPE_WAS_ANONYMOUS (type) = 1;
7958 /* If this is a typedef within a template class, the nested
7959 type is a (non-primary) template. The name for the
7960 template needs updating as well. */
7961 if (TYPE_LANG_SPECIFIC (type) && CLASSTYPE_TEMPLATE_INFO (type))
7962 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type))
7963 = TYPE_IDENTIFIER (type);
7965 /* FIXME remangle member functions; member functions of a
7966 type with external linkage have external linkage. */
7969 /* Any qualifiers on a function type typedef have already been
7971 if (memfn_quals && !ctype && TREE_CODE (type) == FUNCTION_TYPE)
7972 memfn_quals = TYPE_UNQUALIFIED;
7975 || (typedef_decl && C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl)))
7976 C_TYPEDEF_EXPLICITLY_SIGNED (decl) = 1;
7978 bad_specifiers (decl, "type", virtualp,
7979 memfn_quals != TYPE_UNQUALIFIED,
7980 inlinep, friendp, raises != NULL_TREE);
7985 /* Detect the case of an array type of unspecified size
7986 which came, as such, direct from a typedef name.
7987 We must copy the type, so that the array's domain can be
7988 individually set by the object's initializer. */
7990 if (type && typedef_type
7991 && TREE_CODE (type) == ARRAY_TYPE && !TYPE_DOMAIN (type)
7992 && TYPE_MAIN_VARIANT (type) == TYPE_MAIN_VARIANT (typedef_type))
7993 type = build_cplus_array_type (TREE_TYPE (type), NULL_TREE);
7995 /* Detect where we're using a typedef of function type to declare a
7996 function. PARMS will not be set, so we must create it now. */
7998 if (type == typedef_type && TREE_CODE (type) == FUNCTION_TYPE)
8000 tree decls = NULL_TREE;
8003 for (args = TYPE_ARG_TYPES (type); args; args = TREE_CHAIN (args))
8005 tree decl = cp_build_parm_decl (NULL_TREE, TREE_VALUE (args));
8007 TREE_CHAIN (decl) = decls;
8011 parms = nreverse (decls);
8013 if (decl_context != TYPENAME)
8015 /* A cv-qualifier-seq shall only be part of the function type
8016 for a non-static member function. [8.3.5/4 dcl.fct] */
8017 if (cp_type_quals (type) != TYPE_UNQUALIFIED
8018 && (current_class_type == NULL_TREE || staticp) )
8020 error ("qualified function types cannot be used to declare %s functions",
8021 (staticp? "static member" : "free"));
8022 type = TYPE_MAIN_VARIANT (type);
8025 /* The qualifiers on the function type become the qualifiers on
8026 the non-static member function. */
8027 memfn_quals |= cp_type_quals (type);
8031 /* If this is a type name (such as, in a cast or sizeof),
8032 compute the type and return it now. */
8034 if (decl_context == TYPENAME)
8036 /* Note that the grammar rejects storage classes
8037 in typenames, fields or parameters. */
8038 if (type_quals != TYPE_UNQUALIFIED)
8039 type_quals = TYPE_UNQUALIFIED;
8041 /* Special case: "friend class foo" looks like a TYPENAME context. */
8044 if (type_quals != TYPE_UNQUALIFIED)
8046 error ("type qualifiers specified for friend class declaration");
8047 type_quals = TYPE_UNQUALIFIED;
8051 error ("%<inline%> specified for friend class declaration");
8057 /* Don't allow friend declaration without a class-key. */
8058 if (TREE_CODE (type) == TEMPLATE_TYPE_PARM)
8059 pedwarn ("template parameters cannot be friends");
8060 else if (TREE_CODE (type) == TYPENAME_TYPE)
8061 pedwarn ("friend declaration requires class-key, "
8062 "i.e. %<friend class %T::%D%>",
8063 TYPE_CONTEXT (type), TYPENAME_TYPE_FULLNAME (type));
8065 pedwarn ("friend declaration requires class-key, "
8066 "i.e. %<friend %#T%>",
8070 /* Only try to do this stuff if we didn't already give up. */
8071 if (type != integer_type_node)
8073 /* A friendly class? */
8074 if (current_class_type)
8075 make_friend_class (current_class_type, TYPE_MAIN_VARIANT (type),
8078 error ("trying to make class %qT a friend of global scope",
8081 type = void_type_node;
8084 else if (memfn_quals)
8086 if (ctype == NULL_TREE)
8088 if (TREE_CODE (type) != METHOD_TYPE)
8089 error ("invalid qualifiers on non-member function type");
8091 ctype = TYPE_METHOD_BASETYPE (type);
8094 type = build_memfn_type (type, ctype, memfn_quals);
8099 else if (unqualified_id == NULL_TREE && decl_context != PARM
8100 && decl_context != CATCHPARM
8101 && TREE_CODE (type) != UNION_TYPE
8104 error ("abstract declarator %qT used as declaration", type);
8105 return error_mark_node;
8108 /* Only functions may be declared using an operator-function-id. */
8110 && IDENTIFIER_OPNAME_P (unqualified_id)
8111 && TREE_CODE (type) != FUNCTION_TYPE
8112 && TREE_CODE (type) != METHOD_TYPE)
8114 error ("declaration of %qD as non-function", unqualified_id);
8115 return error_mark_node;
8118 /* We don't check parameter types here because we can emit a better
8119 error message later. */
8120 if (decl_context != PARM)
8121 type = check_var_type (unqualified_id, type);
8123 /* Now create the decl, which may be a VAR_DECL, a PARM_DECL
8124 or a FUNCTION_DECL, depending on DECL_CONTEXT and TYPE. */
8126 if (decl_context == PARM || decl_context == CATCHPARM)
8128 if (ctype || in_namespace)
8129 error ("cannot use %<::%> in parameter declaration");
8131 /* A parameter declared as an array of T is really a pointer to T.
8132 One declared as a function is really a pointer to a function.
8133 One declared as a member is really a pointer to member. */
8135 if (TREE_CODE (type) == ARRAY_TYPE)
8137 /* Transfer const-ness of array into that of type pointed to. */
8138 type = build_pointer_type (TREE_TYPE (type));
8139 type_quals = TYPE_UNQUALIFIED;
8141 else if (TREE_CODE (type) == FUNCTION_TYPE)
8142 type = build_pointer_type (type);
8148 if (decl_context == PARM)
8150 decl = cp_build_parm_decl (unqualified_id, type);
8152 bad_specifiers (decl, "parameter", virtualp,
8153 memfn_quals != TYPE_UNQUALIFIED,
8154 inlinep, friendp, raises != NULL_TREE);
8156 else if (decl_context == FIELD)
8158 /* The C99 flexible array extension. */
8159 if (!staticp && TREE_CODE (type) == ARRAY_TYPE
8160 && TYPE_DOMAIN (type) == NULL_TREE)
8162 tree itype = compute_array_index_type (dname, integer_zero_node);
8163 type = build_cplus_array_type (TREE_TYPE (type), itype);
8166 if (type == error_mark_node)
8168 /* Happens when declaring arrays of sizes which
8169 are error_mark_node, for example. */
8172 else if (in_namespace && !friendp)
8174 /* Something like struct S { int N::j; }; */
8175 error ("invalid use of %<::%>");
8176 return error_mark_node;
8178 else if (TREE_CODE (type) == FUNCTION_TYPE)
8181 tree function_context;
8185 if (ctype == NULL_TREE)
8186 ctype = current_class_type;
8188 if (ctype == NULL_TREE)
8190 error ("can't make %qD into a method -- not in a class",
8192 return error_mark_node;
8195 /* ``A union may [ ... ] not [ have ] virtual functions.''
8197 if (virtualp && TREE_CODE (ctype) == UNION_TYPE)
8199 error ("function %qD declared virtual inside a union",
8201 return error_mark_node;
8204 if (NEW_DELETE_OPNAME_P (unqualified_id))
8208 error ("%qD cannot be declared virtual, since it "
8214 else if (staticp < 2)
8215 type = build_memfn_type (type, ctype, memfn_quals);
8218 /* Check that the name used for a destructor makes sense. */
8219 if (sfk == sfk_destructor)
8223 gcc_assert (friendp);
8224 error ("expected qualified name in friend declaration "
8225 "for destructor %qD",
8226 id_declarator->u.id.unqualified_name);
8227 return error_mark_node;
8230 if (!same_type_p (TREE_OPERAND
8231 (id_declarator->u.id.unqualified_name, 0),
8234 error ("declaration of %qD as member of %qT",
8235 id_declarator->u.id.unqualified_name, ctype);
8236 return error_mark_node;
8240 /* Tell grokfndecl if it needs to set TREE_PUBLIC on the node. */
8241 function_context = (ctype != NULL_TREE) ?
8242 decl_function_context (TYPE_MAIN_DECL (ctype)) : NULL_TREE;
8243 publicp = (! friendp || ! staticp)
8244 && function_context == NULL_TREE;
8245 decl = grokfndecl (ctype, type,
8246 TREE_CODE (unqualified_id) != TEMPLATE_ID_EXPR
8247 ? unqualified_id : dname,
8250 virtualp, flags, memfn_quals, raises,
8251 friendp ? -1 : 0, friendp, publicp, inlinep,
8253 funcdef_flag, template_count, in_namespace, attrlist);
8254 if (decl == NULL_TREE)
8255 return error_mark_node;
8257 /* This clobbers the attrs stored in `decl' from `attrlist'. */
8258 /* The decl and setting of decl_attr is also turned off. */
8259 decl = build_decl_attribute_variant (decl, decl_attr);
8262 /* [class.conv.ctor]
8264 A constructor declared without the function-specifier
8265 explicit that can be called with a single parameter
8266 specifies a conversion from the type of its first
8267 parameter to the type of its class. Such a constructor
8268 is called a converting constructor. */
8270 DECL_NONCONVERTING_P (decl) = 1;
8271 else if (DECL_CONSTRUCTOR_P (decl))
8273 /* The constructor can be called with exactly one
8274 parameter if there is at least one parameter, and
8275 any subsequent parameters have default arguments.
8276 Ignore any compiler-added parms. */
8277 tree arg_types = FUNCTION_FIRST_USER_PARMTYPE (decl);
8279 if (arg_types == void_list_node
8281 && TREE_CHAIN (arg_types)
8282 && TREE_CHAIN (arg_types) != void_list_node
8283 && !TREE_PURPOSE (TREE_CHAIN (arg_types))))
8284 DECL_NONCONVERTING_P (decl) = 1;
8287 else if (TREE_CODE (type) == METHOD_TYPE)
8289 /* We only get here for friend declarations of
8290 members of other classes. */
8291 /* All method decls are public, so tell grokfndecl to set
8292 TREE_PUBLIC, also. */
8293 decl = grokfndecl (ctype, type,
8294 TREE_CODE (unqualified_id) != TEMPLATE_ID_EXPR
8295 ? unqualified_id : dname,
8298 virtualp, flags, memfn_quals, raises,
8299 friendp ? -1 : 0, friendp, 1, 0, sfk,
8300 funcdef_flag, template_count, in_namespace,
8302 if (decl == NULL_TREE)
8303 return error_mark_node;
8305 else if (!staticp && !dependent_type_p (type)
8306 && !COMPLETE_TYPE_P (complete_type (type))
8307 && (TREE_CODE (type) != ARRAY_TYPE || initialized == 0))
8310 error ("field %qD has incomplete type", unqualified_id);
8312 error ("name %qT has incomplete type", type);
8314 /* If we're instantiating a template, tell them which
8315 instantiation made the field's type be incomplete. */
8316 if (current_class_type
8317 && TYPE_NAME (current_class_type)
8318 && IDENTIFIER_TEMPLATE (TYPE_IDENTIFIER (current_class_type))
8320 && declspecs->type == type)
8321 error (" in instantiation of template %qT",
8322 current_class_type);
8324 type = error_mark_node;
8331 error ("%qE is neither function nor member function; "
8332 "cannot be declared friend", unqualified_id);
8340 /* Friends are treated specially. */
8341 if (ctype == current_class_type)
8342 ; /* We already issued a pedwarn. */
8343 else if (decl && DECL_NAME (decl))
8345 if (template_class_depth (current_class_type) == 0)
8347 decl = check_explicit_specialization
8348 (unqualified_id, decl, template_count,
8349 2 * funcdef_flag + 4);
8350 if (decl == error_mark_node)
8351 return error_mark_node;
8354 decl = do_friend (ctype, unqualified_id, decl,
8360 return error_mark_node;
8363 /* Structure field. It may not be a function, except for C++. */
8365 if (decl == NULL_TREE)
8371 /* An attempt is being made to initialize a non-static
8372 member. But, from [class.mem]:
8374 4 A member-declarator can contain a
8375 constant-initializer only if it declares a static
8376 member (_class.static_) of integral or enumeration
8377 type, see _class.static.data_.
8379 This used to be relatively common practice, but
8380 the rest of the compiler does not correctly
8381 handle the initialization unless the member is
8382 static so we make it static below. */
8383 pedwarn ("ISO C++ forbids initialization of member %qD",
8385 pedwarn ("making %qD static", unqualified_id);
8389 if (uses_template_parms (type))
8390 /* We'll check at instantiation time. */
8392 else if (check_static_variable_definition (unqualified_id,
8394 /* If we just return the declaration, crashes
8395 will sometimes occur. We therefore return
8396 void_type_node, as if this was a friend
8397 declaration, to cause callers to completely
8398 ignore this declaration. */
8399 return error_mark_node;
8404 /* C++ allows static class members. All other work
8405 for this is done by grokfield. */
8406 decl = build_lang_decl (VAR_DECL, unqualified_id, type);
8407 set_linkage_for_static_data_member (decl);
8408 /* Even if there is an in-class initialization, DECL
8409 is considered undefined until an out-of-class
8410 definition is provided. */
8411 DECL_EXTERNAL (decl) = 1;
8415 if (targetm.have_tls)
8416 DECL_TLS_MODEL (decl) = decl_default_tls_model (decl);
8418 /* A mere warning is sure to result in improper
8419 semantics at runtime. Don't bother to allow this to
8421 error ("thread-local storage not supported for this target");
8426 decl = build_decl (FIELD_DECL, unqualified_id, type);
8427 DECL_NONADDRESSABLE_P (decl) = bitfield;
8428 if (storage_class == sc_mutable)
8430 DECL_MUTABLE_P (decl) = 1;
8431 storage_class = sc_none;
8435 bad_specifiers (decl, "field", virtualp,
8436 memfn_quals != TYPE_UNQUALIFIED,
8437 inlinep, friendp, raises != NULL_TREE);
8440 else if (TREE_CODE (type) == FUNCTION_TYPE
8441 || TREE_CODE (type) == METHOD_TYPE)
8446 if (!unqualified_id)
8447 return error_mark_node;
8449 if (TREE_CODE (unqualified_id) == TEMPLATE_ID_EXPR)
8450 original_name = dname;
8452 original_name = unqualified_id;
8454 if (storage_class == sc_auto)
8455 error ("storage class %<auto%> invalid for function %qs", name);
8456 else if (storage_class == sc_register)
8457 error ("storage class %<register%> invalid for function %qs", name);
8459 error ("storage class %<__thread%> invalid for function %qs", name);
8461 /* Function declaration not at top level.
8462 Storage classes other than `extern' are not allowed
8463 and `extern' makes no difference. */
8464 if (! toplevel_bindings_p ()
8465 && (storage_class == sc_static
8466 || declspecs->specs[(int)ds_inline])
8469 if (storage_class == sc_static)
8470 pedwarn ("%<static%> specified invalid for function %qs "
8471 "declared out of global scope", name);
8473 pedwarn ("%<inline%> specifier invalid for function %qs "
8474 "declared out of global scope", name);
8477 if (ctype == NULL_TREE)
8481 error ("virtual non-class function %qs", name);
8485 else if (TREE_CODE (type) == FUNCTION_TYPE && staticp < 2
8486 && !NEW_DELETE_OPNAME_P (original_name))
8487 type = build_method_type_directly (ctype,
8489 TYPE_ARG_TYPES (type));
8491 /* Record presence of `static'. */
8492 publicp = (ctype != NULL_TREE
8493 || storage_class == sc_extern
8494 || storage_class != sc_static);
8496 decl = grokfndecl (ctype, type, original_name, parms, unqualified_id,
8497 virtualp, flags, memfn_quals, raises,
8499 publicp, inlinep, sfk, funcdef_flag,
8500 template_count, in_namespace, attrlist);
8501 if (decl == NULL_TREE)
8502 return error_mark_node;
8506 int invalid_static = 0;
8508 /* Don't allow a static member function in a class, and forbid
8509 declaring main to be static. */
8510 if (TREE_CODE (type) == METHOD_TYPE)
8512 pedwarn ("cannot declare member function %qD to have "
8513 "static linkage", decl);
8516 else if (current_function_decl)
8518 /* FIXME need arm citation */
8519 error ("cannot declare static function inside another function");
8526 storage_class = sc_none;
8532 /* It's a variable. */
8534 /* An uninitialized decl with `extern' is a reference. */
8535 decl = grokvardecl (type, unqualified_id,
8538 (type_quals & TYPE_QUAL_CONST) != 0,
8539 ctype ? ctype : in_namespace);
8540 bad_specifiers (decl, "variable", virtualp,
8541 memfn_quals != TYPE_UNQUALIFIED,
8542 inlinep, friendp, raises != NULL_TREE);
8546 DECL_CONTEXT (decl) = ctype;
8549 pedwarn ("%<static%> may not be used when defining "
8550 "(as opposed to declaring) a static data member");
8552 storage_class = sc_none;
8554 if (storage_class == sc_register && TREE_STATIC (decl))
8556 error ("static member %qD declared %<register%>", decl);
8557 storage_class = sc_none;
8559 if (storage_class == sc_extern && pedantic)
8561 pedwarn ("cannot explicitly declare member %q#D to have "
8564 storage_class = sc_none;
8569 /* Record `register' declaration for warnings on &
8570 and in case doing stupid register allocation. */
8572 if (storage_class == sc_register)
8573 DECL_REGISTER (decl) = 1;
8574 else if (storage_class == sc_extern)
8575 DECL_THIS_EXTERN (decl) = 1;
8576 else if (storage_class == sc_static)
8577 DECL_THIS_STATIC (decl) = 1;
8579 /* Record constancy and volatility. There's no need to do this
8580 when processing a template; we'll do this for the instantiated
8581 declaration based on the type of DECL. */
8582 if (!processing_template_decl)
8583 cp_apply_type_quals_to_decl (type_quals, decl);
8589 /* Subroutine of start_function. Ensure that each of the parameter
8590 types (as listed in PARMS) is complete, as is required for a
8591 function definition. */
8594 require_complete_types_for_parms (tree parms)
8596 for (; parms; parms = TREE_CHAIN (parms))
8598 if (dependent_type_p (TREE_TYPE (parms)))
8600 if (!VOID_TYPE_P (TREE_TYPE (parms))
8601 && complete_type_or_else (TREE_TYPE (parms), parms))
8603 relayout_decl (parms);
8604 DECL_ARG_TYPE (parms) = type_passed_as (TREE_TYPE (parms));
8607 /* grokparms or complete_type_or_else will have already issued
8609 TREE_TYPE (parms) = error_mark_node;
8613 /* Returns nonzero if T is a local variable. */
8616 local_variable_p (tree t)
8618 if ((TREE_CODE (t) == VAR_DECL
8619 /* A VAR_DECL with a context that is a _TYPE is a static data
8621 && !TYPE_P (CP_DECL_CONTEXT (t))
8622 /* Any other non-local variable must be at namespace scope. */
8623 && !DECL_NAMESPACE_SCOPE_P (t))
8624 || (TREE_CODE (t) == PARM_DECL))
8630 /* Returns nonzero if T is an automatic local variable or a label.
8631 (These are the declarations that need to be remapped when the code
8632 containing them is duplicated.) */
8635 nonstatic_local_decl_p (tree t)
8637 return ((local_variable_p (t) && !TREE_STATIC (t))
8638 || TREE_CODE (t) == LABEL_DECL
8639 || TREE_CODE (t) == RESULT_DECL);
8642 /* Like local_variable_p, but suitable for use as a tree-walking
8646 local_variable_p_walkfn (tree *tp, int *walk_subtrees,
8647 void *data ATTRIBUTE_UNUSED)
8649 if (local_variable_p (*tp) && !DECL_ARTIFICIAL (*tp))
8651 else if (TYPE_P (*tp))
8658 /* Check that ARG, which is a default-argument expression for a
8659 parameter DECL, is valid. Returns ARG, or ERROR_MARK_NODE, if
8660 something goes wrong. DECL may also be a _TYPE node, rather than a
8661 DECL, if there is no DECL available. */
8664 check_default_argument (tree decl, tree arg)
8669 if (TREE_CODE (arg) == DEFAULT_ARG)
8670 /* We get a DEFAULT_ARG when looking at an in-class declaration
8671 with a default argument. Ignore the argument for now; we'll
8672 deal with it after the class is complete. */
8681 decl_type = TREE_TYPE (decl);
8683 if (arg == error_mark_node
8684 || decl == error_mark_node
8685 || TREE_TYPE (arg) == error_mark_node
8686 || decl_type == error_mark_node)
8687 /* Something already went wrong. There's no need to check
8689 return error_mark_node;
8691 /* [dcl.fct.default]
8693 A default argument expression is implicitly converted to the
8695 if (!TREE_TYPE (arg)
8696 || !can_convert_arg (decl_type, TREE_TYPE (arg), arg, LOOKUP_NORMAL))
8699 error ("default argument for %q#D has type %qT",
8700 decl, TREE_TYPE (arg));
8702 error ("default argument for parameter of type %qT has type %qT",
8703 decl_type, TREE_TYPE (arg));
8705 return error_mark_node;
8708 /* [dcl.fct.default]
8710 Local variables shall not be used in default argument
8713 The keyword `this' shall not be used in a default argument of a
8715 var = walk_tree_without_duplicates (&arg, local_variable_p_walkfn,
8719 error ("default argument %qE uses local variable %qD", arg, var);
8720 return error_mark_node;
8727 /* Decode the list of parameter types for a function type.
8728 Given the list of things declared inside the parens,
8729 return a list of types.
8731 If this parameter does not end with an ellipsis, we append
8734 *PARMS is set to the chain of PARM_DECLs created. */
8737 grokparms (cp_parameter_declarator *first_parm, tree *parms)
8739 tree result = NULL_TREE;
8740 tree decls = NULL_TREE;
8741 int ellipsis = !first_parm || first_parm->ellipsis_p;
8742 cp_parameter_declarator *parm;
8745 for (parm = first_parm; parm != NULL; parm = parm->next)
8747 tree type = NULL_TREE;
8748 tree init = parm->default_argument;
8752 if (parm == no_parameters)
8755 attrs = parm->decl_specifiers.attributes;
8756 parm->decl_specifiers.attributes = NULL_TREE;
8757 decl = grokdeclarator (parm->declarator, &parm->decl_specifiers,
8758 PARM, init != NULL_TREE, &attrs);
8759 if (! decl || TREE_TYPE (decl) == error_mark_node)
8763 cplus_decl_attributes (&decl, attrs, 0);
8765 type = TREE_TYPE (decl);
8766 if (VOID_TYPE_P (type))
8768 if (same_type_p (type, void_type_node)
8769 && DECL_SELF_REFERENCE_P (type)
8770 && !DECL_NAME (decl) && !result && !parm->next && !ellipsis)
8771 /* this is a parmlist of `(void)', which is ok. */
8773 cxx_incomplete_type_error (decl, type);
8774 /* It's not a good idea to actually create parameters of
8775 type `void'; other parts of the compiler assume that a
8776 void type terminates the parameter list. */
8777 type = error_mark_node;
8778 TREE_TYPE (decl) = error_mark_node;
8781 if (type != error_mark_node)
8783 /* Top-level qualifiers on the parameters are
8784 ignored for function types. */
8785 type = cp_build_qualified_type (type, 0);
8786 if (TREE_CODE (type) == METHOD_TYPE)
8788 error ("parameter %qD invalidly declared method type", decl);
8789 type = build_pointer_type (type);
8790 TREE_TYPE (decl) = type;
8792 else if (abstract_virtuals_error (decl, type))
8793 any_error = 1; /* Seems like a good idea. */
8794 else if (POINTER_TYPE_P (type))
8796 /* [dcl.fct]/6, parameter types cannot contain pointers
8797 (references) to arrays of unknown bound. */
8798 tree t = TREE_TYPE (type);
8799 int ptr = TYPE_PTR_P (type);
8805 else if (TREE_CODE (t) != ARRAY_TYPE)
8807 else if (!TYPE_DOMAIN (t))
8811 if (TREE_CODE (t) == ARRAY_TYPE)
8812 error ("parameter %qD includes %s to array of unknown "
8814 decl, ptr ? "pointer" : "reference", t);
8819 else if (init && !processing_template_decl)
8820 init = check_default_argument (decl, init);
8823 TREE_CHAIN (decl) = decls;
8825 result = tree_cons (init, type, result);
8827 decls = nreverse (decls);
8828 result = nreverse (result);
8830 result = chainon (result, void_list_node);
8837 /* D is a constructor or overloaded `operator='.
8839 Let T be the class in which D is declared. Then, this function
8842 -1 if D's is an ill-formed constructor or copy assignment operator
8843 whose first parameter is of type `T'.
8844 0 if D is not a copy constructor or copy assignment
8846 1 if D is a copy constructor or copy assignment operator whose
8847 first parameter is a reference to const qualified T.
8848 2 if D is a copy constructor or copy assignment operator whose
8849 first parameter is a reference to non-const qualified T.
8851 This function can be used as a predicate. Positive values indicate
8852 a copy constructor and nonzero values indicate a copy assignment
8862 if (!DECL_FUNCTION_MEMBER_P (d))
8863 /* Non-members are invalid. We complained, but kept the declaration. */
8866 if (TREE_CODE (d) == TEMPLATE_DECL
8867 || (DECL_TEMPLATE_INFO (d)
8868 && DECL_MEMBER_TEMPLATE_P (DECL_TI_TEMPLATE (d))))
8869 /* Instantiations of template member functions are never copy
8870 functions. Note that member functions of templated classes are
8871 represented as template functions internally, and we must
8872 accept those as copy functions. */
8875 args = FUNCTION_FIRST_USER_PARMTYPE (d);
8879 arg_type = TREE_VALUE (args);
8880 if (arg_type == error_mark_node)
8883 if (TYPE_MAIN_VARIANT (arg_type) == DECL_CONTEXT (d))
8885 /* Pass by value copy assignment operator. */
8888 else if (TREE_CODE (arg_type) == REFERENCE_TYPE
8889 && TYPE_MAIN_VARIANT (TREE_TYPE (arg_type)) == DECL_CONTEXT (d))
8891 if (CP_TYPE_CONST_P (TREE_TYPE (arg_type)))
8897 args = TREE_CHAIN (args);
8899 if (args && args != void_list_node && !TREE_PURPOSE (args))
8900 /* There are more non-optional args. */
8906 /* Remember any special properties of member function DECL. */
8908 void grok_special_member_properties (tree decl)
8912 if (!DECL_NONSTATIC_MEMBER_FUNCTION_P (decl))
8915 class_type = DECL_CONTEXT (decl);
8916 if (DECL_CONSTRUCTOR_P (decl))
8918 int ctor = copy_fn_p (decl);
8920 TYPE_HAS_CONSTRUCTOR (class_type) = 1;
8926 A non-template constructor for class X is a copy
8927 constructor if its first parameter is of type X&, const
8928 X&, volatile X& or const volatile X&, and either there
8929 are no other parameters or else all other parameters have
8930 default arguments. */
8931 TYPE_HAS_INIT_REF (class_type) = 1;
8933 TYPE_HAS_CONST_INIT_REF (class_type) = 1;
8935 else if (sufficient_parms_p (FUNCTION_FIRST_USER_PARMTYPE (decl)))
8936 TYPE_HAS_DEFAULT_CONSTRUCTOR (class_type) = 1;
8938 else if (DECL_OVERLOADED_OPERATOR_P (decl) == NOP_EXPR)
8942 A non-template assignment operator for class X is a copy
8943 assignment operator if its parameter is of type X, X&, const
8944 X&, volatile X& or const volatile X&. */
8946 int assop = copy_fn_p (decl);
8950 TYPE_HAS_ASSIGN_REF (class_type) = 1;
8952 TYPE_HAS_CONST_ASSIGN_REF (class_type) = 1;
8957 /* Check a constructor DECL has the correct form. Complains
8958 if the class has a constructor of the form X(X). */
8961 grok_ctor_properties (tree ctype, tree decl)
8963 int ctor_parm = copy_fn_p (decl);
8969 A declaration of a constructor for a class X is ill-formed if
8970 its first parameter is of type (optionally cv-qualified) X
8971 and either there are no other parameters or else all other
8972 parameters have default arguments.
8974 We *don't* complain about member template instantiations that
8975 have this form, though; they can occur as we try to decide
8976 what constructor to use during overload resolution. Since
8977 overload resolution will never prefer such a constructor to
8978 the non-template copy constructor (which is either explicitly
8979 or implicitly defined), there's no need to worry about their
8980 existence. Theoretically, they should never even be
8981 instantiated, but that's hard to forestall. */
8982 error ("invalid constructor; you probably meant %<%T (const %T&)%>",
8990 /* An operator with this code is unary, but can also be binary. */
8993 ambi_op_p (enum tree_code code)
8995 return (code == INDIRECT_REF
8996 || code == ADDR_EXPR
8997 || code == UNARY_PLUS_EXPR
8998 || code == NEGATE_EXPR
8999 || code == PREINCREMENT_EXPR
9000 || code == PREDECREMENT_EXPR);
9003 /* An operator with this name can only be unary. */
9006 unary_op_p (enum tree_code code)
9008 return (code == TRUTH_NOT_EXPR
9009 || code == BIT_NOT_EXPR
9010 || code == COMPONENT_REF
9011 || code == TYPE_EXPR);
9014 /* DECL is a declaration for an overloaded operator. If COMPLAIN is true,
9015 errors are issued for invalid declarations. */
9018 grok_op_properties (tree decl, bool complain)
9020 tree argtypes = TYPE_ARG_TYPES (TREE_TYPE (decl));
9022 int methodp = (TREE_CODE (TREE_TYPE (decl)) == METHOD_TYPE);
9023 tree name = DECL_NAME (decl);
9024 enum tree_code operator_code;
9029 /* Count the number of arguments and check for ellipsis. */
9030 for (argtype = argtypes, arity = 0;
9031 argtype && argtype != void_list_node;
9032 argtype = TREE_CHAIN (argtype))
9034 ellipsis_p = !argtype;
9036 class_type = DECL_CONTEXT (decl);
9037 if (class_type && !CLASS_TYPE_P (class_type))
9038 class_type = NULL_TREE;
9040 if (DECL_CONV_FN_P (decl))
9041 operator_code = TYPE_EXPR;
9045 #define DEF_OPERATOR(NAME, CODE, MANGLING, ARITY, ASSN_P) \
9046 if (ansi_opname (CODE) == name) \
9048 operator_code = (CODE); \
9051 else if (ansi_assopname (CODE) == name) \
9053 operator_code = (CODE); \
9054 DECL_ASSIGNMENT_OPERATOR_P (decl) = 1; \
9058 #include "operators.def"
9064 gcc_assert (operator_code != LAST_CPLUS_TREE_CODE);
9065 SET_OVERLOADED_OPERATOR_CODE (decl, operator_code);
9068 switch (operator_code)
9071 TYPE_HAS_NEW_OPERATOR (class_type) = 1;
9075 TYPE_GETS_DELETE (class_type) |= 1;
9079 TYPE_HAS_ARRAY_NEW_OPERATOR (class_type) = 1;
9082 case VEC_DELETE_EXPR:
9083 TYPE_GETS_DELETE (class_type) |= 2;
9090 /* [basic.std.dynamic.allocation]/1:
9092 A program is ill-formed if an allocation function is declared
9093 in a namespace scope other than global scope or declared static
9096 The same also holds true for deallocation functions. */
9097 if (operator_code == NEW_EXPR || operator_code == VEC_NEW_EXPR
9098 || operator_code == DELETE_EXPR || operator_code == VEC_DELETE_EXPR)
9100 if (DECL_NAMESPACE_SCOPE_P (decl))
9102 if (CP_DECL_CONTEXT (decl) != global_namespace)
9103 error ("%qD may not be declared within a namespace", decl);
9104 else if (!TREE_PUBLIC (decl))
9105 error ("%qD may not be declared as static", decl);
9109 if (operator_code == NEW_EXPR || operator_code == VEC_NEW_EXPR)
9110 TREE_TYPE (decl) = coerce_new_type (TREE_TYPE (decl));
9111 else if (operator_code == DELETE_EXPR || operator_code == VEC_DELETE_EXPR)
9112 TREE_TYPE (decl) = coerce_delete_type (TREE_TYPE (decl));
9115 /* An operator function must either be a non-static member function
9116 or have at least one parameter of a class, a reference to a class,
9117 an enumeration, or a reference to an enumeration. 13.4.0.6 */
9118 if (! methodp || DECL_STATIC_FUNCTION_P (decl))
9120 if (operator_code == TYPE_EXPR
9121 || operator_code == CALL_EXPR
9122 || operator_code == COMPONENT_REF
9123 || operator_code == ARRAY_REF
9124 || operator_code == NOP_EXPR)
9126 error ("%qD must be a nonstatic member function", decl);
9133 if (DECL_STATIC_FUNCTION_P (decl))
9135 error ("%qD must be either a non-static member "
9136 "function or a non-member function", decl);
9140 for (p = argtypes; p && p != void_list_node; p = TREE_CHAIN (p))
9142 tree arg = non_reference (TREE_VALUE (p));
9143 if (arg == error_mark_node)
9146 /* IS_AGGR_TYPE, rather than CLASS_TYPE_P, is used
9147 because these checks are performed even on
9148 template functions. */
9149 if (IS_AGGR_TYPE (arg) || TREE_CODE (arg) == ENUMERAL_TYPE)
9153 if (!p || p == void_list_node)
9158 error ("%qD must have an argument of class or "
9165 /* There are no restrictions on the arguments to an overloaded
9167 if (operator_code == CALL_EXPR)
9170 /* Warn about conversion operators that will never be used. */
9171 if (IDENTIFIER_TYPENAME_P (name)
9172 && ! DECL_TEMPLATE_INFO (decl)
9174 /* Warn only declaring the function; there is no need to
9175 warn again about out-of-class definitions. */
9176 && class_type == current_class_type)
9178 tree t = TREE_TYPE (name);
9179 int ref = (TREE_CODE (t) == REFERENCE_TYPE);
9180 const char *what = 0;
9183 t = TYPE_MAIN_VARIANT (TREE_TYPE (t));
9185 if (TREE_CODE (t) == VOID_TYPE)
9187 else if (class_type)
9189 if (t == class_type)
9190 what = "the same type";
9191 /* Don't force t to be complete here. */
9192 else if (IS_AGGR_TYPE (t)
9193 && COMPLETE_TYPE_P (t)
9194 && DERIVED_FROM_P (t, class_type))
9195 what = "a base class";
9199 warning (OPT_Wconversion, "conversion to %s%s will never use a type "
9200 "conversion operator",
9201 ref ? "a reference to " : "", what);
9204 if (operator_code == COND_EXPR)
9207 error ("ISO C++ prohibits overloading operator ?:");
9209 else if (ellipsis_p)
9210 error ("%qD must not have variable number of arguments", decl);
9211 else if (ambi_op_p (operator_code))
9214 /* We pick the one-argument operator codes by default, so
9215 we don't have to change anything. */
9217 else if (arity == 2)
9219 /* If we thought this was a unary operator, we now know
9220 it to be a binary operator. */
9221 switch (operator_code)
9224 operator_code = MULT_EXPR;
9228 operator_code = BIT_AND_EXPR;
9231 case UNARY_PLUS_EXPR:
9232 operator_code = PLUS_EXPR;
9236 operator_code = MINUS_EXPR;
9239 case PREINCREMENT_EXPR:
9240 operator_code = POSTINCREMENT_EXPR;
9243 case PREDECREMENT_EXPR:
9244 operator_code = POSTDECREMENT_EXPR;
9251 SET_OVERLOADED_OPERATOR_CODE (decl, operator_code);
9253 if ((operator_code == POSTINCREMENT_EXPR
9254 || operator_code == POSTDECREMENT_EXPR)
9255 && ! processing_template_decl
9256 && ! same_type_p (TREE_VALUE (TREE_CHAIN (argtypes)), integer_type_node))
9259 error ("postfix %qD must take %<int%> as its argument",
9263 ("postfix %qD must take %<int%> as its second argument",
9270 error ("%qD must take either zero or one argument", decl);
9272 error ("%qD must take either one or two arguments", decl);
9275 /* More Effective C++ rule 6. */
9277 && (operator_code == POSTINCREMENT_EXPR
9278 || operator_code == POSTDECREMENT_EXPR
9279 || operator_code == PREINCREMENT_EXPR
9280 || operator_code == PREDECREMENT_EXPR))
9282 tree arg = TREE_VALUE (argtypes);
9283 tree ret = TREE_TYPE (TREE_TYPE (decl));
9284 if (methodp || TREE_CODE (arg) == REFERENCE_TYPE)
9285 arg = TREE_TYPE (arg);
9286 arg = TYPE_MAIN_VARIANT (arg);
9287 if (operator_code == PREINCREMENT_EXPR
9288 || operator_code == PREDECREMENT_EXPR)
9290 if (TREE_CODE (ret) != REFERENCE_TYPE
9291 || !same_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (ret)),
9293 warning (OPT_Weffc__, "prefix %qD should return %qT", decl,
9294 build_reference_type (arg));
9298 if (!same_type_p (TYPE_MAIN_VARIANT (ret), arg))
9299 warning (OPT_Weffc__, "postfix %qD should return %qT", decl, arg);
9303 else if (unary_op_p (operator_code))
9308 error ("%qD must take %<void%>", decl);
9310 error ("%qD must take exactly one argument", decl);
9313 else /* if (binary_op_p (operator_code)) */
9318 error ("%qD must take exactly one argument", decl);
9320 error ("%qD must take exactly two arguments", decl);
9323 /* More Effective C++ rule 7. */
9325 && (operator_code == TRUTH_ANDIF_EXPR
9326 || operator_code == TRUTH_ORIF_EXPR
9327 || operator_code == COMPOUND_EXPR))
9328 warning (OPT_Weffc__, "user-defined %qD always evaluates both arguments",
9332 /* Effective C++ rule 23. */
9335 && !DECL_ASSIGNMENT_OPERATOR_P (decl)
9336 && (operator_code == PLUS_EXPR
9337 || operator_code == MINUS_EXPR
9338 || operator_code == TRUNC_DIV_EXPR
9339 || operator_code == MULT_EXPR
9340 || operator_code == TRUNC_MOD_EXPR)
9341 && TREE_CODE (TREE_TYPE (TREE_TYPE (decl))) == REFERENCE_TYPE)
9342 warning (OPT_Weffc__, "%qD should return by value", decl);
9345 for (; argtypes && argtypes != void_list_node;
9346 argtypes = TREE_CHAIN (argtypes))
9347 if (TREE_PURPOSE (argtypes))
9349 TREE_PURPOSE (argtypes) = NULL_TREE;
9350 if (operator_code == POSTINCREMENT_EXPR
9351 || operator_code == POSTDECREMENT_EXPR)
9354 pedwarn ("%qD cannot have default arguments", decl);
9357 error ("%qD cannot have default arguments", decl);
9364 /* Return a string giving the keyword associate with CODE. */
9367 tag_name (enum tag_types code)
9386 /* Name lookup in an elaborated-type-specifier (after the keyword
9387 indicated by TAG_CODE) has found the TYPE_DECL DECL. If the
9388 elaborated-type-specifier is invalid, issue a diagnostic and return
9389 error_mark_node; otherwise, return the *_TYPE to which it referred.
9390 If ALLOW_TEMPLATE_P is true, TYPE may be a class template. */
9393 check_elaborated_type_specifier (enum tag_types tag_code,
9395 bool allow_template_p)
9401 struct S { struct S *p; };
9403 name lookup will find the TYPE_DECL for the implicit "S::S"
9404 typedef. Adjust for that here. */
9405 if (DECL_SELF_REFERENCE_P (decl))
9406 decl = TYPE_NAME (TREE_TYPE (decl));
9408 type = TREE_TYPE (decl);
9410 /* Check TEMPLATE_TYPE_PARM first because DECL_IMPLICIT_TYPEDEF_P
9411 is false for this case as well. */
9412 if (TREE_CODE (type) == TEMPLATE_TYPE_PARM)
9414 error ("using template type parameter %qT after %qs",
9415 type, tag_name (tag_code));
9416 return error_mark_node;
9420 If the identifier resolves to a typedef-name or a template
9421 type-parameter, the elaborated-type-specifier is ill-formed.
9423 In other words, the only legitimate declaration to use in the
9424 elaborated type specifier is the implicit typedef created when
9425 the type is declared. */
9426 else if (!DECL_IMPLICIT_TYPEDEF_P (decl)
9427 && tag_code != typename_type)
9429 error ("using typedef-name %qD after %qs", decl, tag_name (tag_code));
9430 error ("%q+D has a previous declaration here", decl);
9431 return error_mark_node;
9433 else if (TREE_CODE (type) != RECORD_TYPE
9434 && TREE_CODE (type) != UNION_TYPE
9435 && tag_code != enum_type
9436 && tag_code != typename_type)
9438 error ("%qT referred to as %qs", type, tag_name (tag_code));
9439 error ("%q+T has a previous declaration here", type);
9440 return error_mark_node;
9442 else if (TREE_CODE (type) != ENUMERAL_TYPE
9443 && tag_code == enum_type)
9445 error ("%qT referred to as enum", type);
9446 error ("%q+T has a previous declaration here", type);
9447 return error_mark_node;
9449 else if (!allow_template_p
9450 && TREE_CODE (type) == RECORD_TYPE
9451 && CLASSTYPE_IS_TEMPLATE (type))
9453 /* If a class template appears as elaborated type specifier
9454 without a template header such as:
9456 template <class T> class C {};
9457 void f(class C); // No template header here
9459 then the required template argument is missing. */
9460 error ("template argument required for %<%s %T%>",
9461 tag_name (tag_code),
9462 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type)));
9463 return error_mark_node;
9469 /* Lookup NAME in elaborate type specifier in scope according to
9470 SCOPE and issue diagnostics if necessary.
9471 Return *_TYPE node upon success, NULL_TREE when the NAME is not
9472 found, and ERROR_MARK_NODE for type error. */
9475 lookup_and_check_tag (enum tag_types tag_code, tree name,
9476 tag_scope scope, bool template_header_p)
9480 if (scope == ts_global)
9482 /* First try ordinary name lookup, ignoring hidden class name
9483 injected via friend declaration. */
9484 decl = lookup_name_prefer_type (name, 2);
9485 /* If that fails, the name will be placed in the smallest
9486 non-class, non-function-prototype scope according to 3.3.1/5.
9487 We may already have a hidden name declared as friend in this
9488 scope. So lookup again but not ignoring hidden name.
9489 If we find one, that name will be made visible rather than
9490 creating a new tag. */
9492 decl = lookup_type_scope (name, ts_within_enclosing_non_class);
9495 decl = lookup_type_scope (name, scope);
9497 if (decl && DECL_CLASS_TEMPLATE_P (decl))
9498 decl = DECL_TEMPLATE_RESULT (decl);
9500 if (decl && TREE_CODE (decl) == TYPE_DECL)
9502 /* Look for invalid nested type:
9506 if (scope == ts_current && DECL_SELF_REFERENCE_P (decl))
9508 error ("%qD has the same name as the class in which it is "
9511 return error_mark_node;
9514 /* Two cases we need to consider when deciding if a class
9515 template is allowed as an elaborated type specifier:
9516 1. It is a self reference to its own class.
9517 2. It comes with a template header.
9521 template <class T> class C {
9522 class C *c1; // DECL_SELF_REFERENCE_P is true
9525 template <class U> class C; // template_header_p is true
9526 template <class T> class C<T>::D {
9527 class C *c2; // DECL_SELF_REFERENCE_P is true
9530 t = check_elaborated_type_specifier (tag_code,
9533 | DECL_SELF_REFERENCE_P (decl));
9540 /* Get the struct, enum or union (TAG_CODE says which) with tag NAME.
9541 Define the tag as a forward-reference if it is not defined.
9543 If a declaration is given, process it here, and report an error if
9544 multiple declarations are not identical.
9546 SCOPE is TS_CURRENT when this is also a definition. Only look in
9547 the current frame for the name (since C++ allows new names in any
9548 scope.) It is TS_WITHIN_ENCLOSING_NON_CLASS if this is a friend
9549 declaration. Only look beginning from the current scope outward up
9550 till the nearest non-class scope. Otherwise it is TS_GLOBAL.
9552 TEMPLATE_HEADER_P is true when this declaration is preceded by
9553 a set of template parameters. */
9556 xref_tag (enum tag_types tag_code, tree name,
9557 tag_scope scope, bool template_header_p)
9559 enum tree_code code;
9561 tree context = NULL_TREE;
9563 timevar_push (TV_NAME_LOOKUP);
9565 gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE);
9577 code = ENUMERAL_TYPE;
9583 /* In case of anonymous name, xref_tag is only called to
9584 make type node and push name. Name lookup is not required. */
9585 if (ANON_AGGRNAME_P (name))
9588 t = lookup_and_check_tag (tag_code, name,
9589 scope, template_header_p);
9591 if (t == error_mark_node)
9592 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
9594 if (scope != ts_current && t && current_class_type
9595 && template_class_depth (current_class_type)
9596 && template_header_p)
9598 /* Since SCOPE is not TS_CURRENT, we are not looking at a
9599 definition of this tag. Since, in addition, we are currently
9600 processing a (member) template declaration of a template
9601 class, we must be very careful; consider:
9608 { template <class V>
9609 friend struct S1; };
9611 Here, the S2::S1 declaration should not be confused with the
9612 outer declaration. In particular, the inner version should
9613 have a template parameter of level 2, not level 1. This
9614 would be particularly important if the member declaration
9617 template <class V = U> friend struct S1;
9619 say, when we should tsubst into `U' when instantiating
9620 S2. On the other hand, when presented with:
9630 we must find the inner binding eventually. We
9631 accomplish this by making sure that the new type we
9632 create to represent this declaration has the right
9634 context = TYPE_CONTEXT (t);
9640 /* If no such tag is yet defined, create a forward-reference node
9641 and record it as the "definition".
9642 When a real declaration of this type is found,
9643 the forward-reference will be altered into a real type. */
9644 if (code == ENUMERAL_TYPE)
9646 error ("use of enum %q#D without previous declaration", name);
9647 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
9651 t = make_aggr_type (code);
9652 TYPE_CONTEXT (t) = context;
9653 t = pushtag (name, t, scope);
9658 if (template_header_p && IS_AGGR_TYPE (t))
9659 redeclare_class_template (t, current_template_parms);
9660 else if (!processing_template_decl
9662 && CLASSTYPE_IS_TEMPLATE (t))
9664 error ("redeclaration of %qT as a non-template", t);
9665 t = error_mark_node;
9668 /* Make injected friend class visible. */
9669 if (scope != ts_within_enclosing_non_class
9670 && hidden_name_p (TYPE_NAME (t)))
9672 DECL_ANTICIPATED (TYPE_NAME (t)) = 0;
9673 DECL_FRIEND_P (TYPE_NAME (t)) = 0;
9675 if (TYPE_TEMPLATE_INFO (t))
9677 DECL_ANTICIPATED (TYPE_TI_TEMPLATE (t)) = 0;
9678 DECL_FRIEND_P (TYPE_TI_TEMPLATE (t)) = 0;
9683 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, t);
9687 xref_tag_from_type (tree old, tree id, tag_scope scope)
9689 enum tag_types tag_kind;
9691 if (TREE_CODE (old) == RECORD_TYPE)
9692 tag_kind = (CLASSTYPE_DECLARED_CLASS (old) ? class_type : record_type);
9694 tag_kind = union_type;
9696 if (id == NULL_TREE)
9697 id = TYPE_IDENTIFIER (old);
9699 return xref_tag (tag_kind, id, scope, false);
9702 /* Create the binfo hierarchy for REF with (possibly NULL) base list
9703 BASE_LIST. For each element on BASE_LIST the TREE_PURPOSE is an
9704 access_* node, and the TREE_VALUE is the type of the base-class.
9705 Non-NULL TREE_TYPE indicates virtual inheritance. */
9708 xref_basetypes (tree ref, tree base_list)
9711 tree binfo, base_binfo;
9712 unsigned max_vbases = 0; /* Maximum direct & indirect virtual bases. */
9713 unsigned max_bases = 0; /* Maximum direct bases. */
9715 tree default_access;
9716 tree igo_prev; /* Track Inheritance Graph Order. */
9718 if (ref == error_mark_node)
9721 /* The base of a derived class is private by default, all others are
9723 default_access = (TREE_CODE (ref) == RECORD_TYPE
9724 && CLASSTYPE_DECLARED_CLASS (ref)
9725 ? access_private_node : access_public_node);
9727 /* First, make sure that any templates in base-classes are
9728 instantiated. This ensures that if we call ourselves recursively
9729 we do not get confused about which classes are marked and which
9734 tree basetype = TREE_VALUE (*basep);
9736 if (!(processing_template_decl && uses_template_parms (basetype))
9737 && !complete_type_or_else (basetype, NULL))
9738 /* An incomplete type. Remove it from the list. */
9739 *basep = TREE_CHAIN (*basep);
9743 if (TREE_TYPE (*basep))
9745 if (CLASS_TYPE_P (basetype))
9746 max_vbases += VEC_length (tree, CLASSTYPE_VBASECLASSES (basetype));
9747 basep = &TREE_CHAIN (*basep);
9751 TYPE_MARKED_P (ref) = 1;
9753 /* The binfo slot should be empty, unless this is an (ill-formed)
9755 gcc_assert (!TYPE_BINFO (ref) || TYPE_SIZE (ref));
9756 gcc_assert (TYPE_MAIN_VARIANT (ref) == ref);
9758 binfo = make_tree_binfo (max_bases);
9760 TYPE_BINFO (ref) = binfo;
9761 BINFO_OFFSET (binfo) = size_zero_node;
9762 BINFO_TYPE (binfo) = ref;
9766 BINFO_BASE_ACCESSES (binfo) = VEC_alloc (tree, gc, max_bases);
9767 /* An aggregate cannot have baseclasses. */
9768 CLASSTYPE_NON_AGGREGATE (ref) = 1;
9770 if (TREE_CODE (ref) == UNION_TYPE)
9771 error ("derived union %qT invalid", ref);
9776 if (TYPE_FOR_JAVA (ref))
9777 error ("Java class %qT cannot have multiple bases", ref);
9782 CLASSTYPE_VBASECLASSES (ref) = VEC_alloc (tree, gc, max_vbases);
9784 if (TYPE_FOR_JAVA (ref))
9785 error ("Java class %qT cannot have virtual bases", ref);
9788 for (igo_prev = binfo; base_list; base_list = TREE_CHAIN (base_list))
9790 tree access = TREE_PURPOSE (base_list);
9791 int via_virtual = TREE_TYPE (base_list) != NULL_TREE;
9792 tree basetype = TREE_VALUE (base_list);
9794 if (access == access_default_node)
9795 access = default_access;
9797 if (TREE_CODE (basetype) == TYPE_DECL)
9798 basetype = TREE_TYPE (basetype);
9799 if (TREE_CODE (basetype) != RECORD_TYPE
9800 && TREE_CODE (basetype) != TYPENAME_TYPE
9801 && TREE_CODE (basetype) != TEMPLATE_TYPE_PARM
9802 && TREE_CODE (basetype) != BOUND_TEMPLATE_TEMPLATE_PARM)
9804 error ("base type %qT fails to be a struct or class type",
9809 if (TYPE_FOR_JAVA (basetype) && (current_lang_depth () == 0))
9810 TYPE_FOR_JAVA (ref) = 1;
9812 base_binfo = NULL_TREE;
9813 if (CLASS_TYPE_P (basetype) && !dependent_type_p (basetype))
9815 base_binfo = TYPE_BINFO (basetype);
9816 /* The original basetype could have been a typedef'd type. */
9817 basetype = BINFO_TYPE (base_binfo);
9819 /* Inherit flags from the base. */
9820 TYPE_HAS_NEW_OPERATOR (ref)
9821 |= TYPE_HAS_NEW_OPERATOR (basetype);
9822 TYPE_HAS_ARRAY_NEW_OPERATOR (ref)
9823 |= TYPE_HAS_ARRAY_NEW_OPERATOR (basetype);
9824 TYPE_GETS_DELETE (ref) |= TYPE_GETS_DELETE (basetype);
9825 TYPE_HAS_CONVERSION (ref) |= TYPE_HAS_CONVERSION (basetype);
9826 CLASSTYPE_DIAMOND_SHAPED_P (ref)
9827 |= CLASSTYPE_DIAMOND_SHAPED_P (basetype);
9828 CLASSTYPE_REPEATED_BASE_P (ref)
9829 |= CLASSTYPE_REPEATED_BASE_P (basetype);
9832 /* We must do this test after we've seen through a typedef
9834 if (TYPE_MARKED_P (basetype))
9836 if (basetype == ref)
9837 error ("recursive type %qT undefined", basetype);
9839 error ("duplicate base type %qT invalid", basetype);
9842 TYPE_MARKED_P (basetype) = 1;
9844 base_binfo = copy_binfo (base_binfo, basetype, ref,
9845 &igo_prev, via_virtual);
9846 if (!BINFO_INHERITANCE_CHAIN (base_binfo))
9847 BINFO_INHERITANCE_CHAIN (base_binfo) = binfo;
9849 BINFO_BASE_APPEND (binfo, base_binfo);
9850 BINFO_BASE_ACCESS_APPEND (binfo, access);
9853 if (VEC_space (tree, CLASSTYPE_VBASECLASSES (ref), 1))
9854 /* If we have space in the vbase vector, we must have shared at
9855 least one of them, and are therefore diamond shaped. */
9856 CLASSTYPE_DIAMOND_SHAPED_P (ref) = 1;
9858 /* Unmark all the types. */
9859 for (i = 0; BINFO_BASE_ITERATE (binfo, i, base_binfo); i++)
9860 TYPE_MARKED_P (BINFO_TYPE (base_binfo)) = 0;
9861 TYPE_MARKED_P (ref) = 0;
9863 /* Now see if we have a repeated base type. */
9864 if (!CLASSTYPE_REPEATED_BASE_P (ref))
9866 for (base_binfo = binfo; base_binfo;
9867 base_binfo = TREE_CHAIN (base_binfo))
9869 if (TYPE_MARKED_P (BINFO_TYPE (base_binfo)))
9871 CLASSTYPE_REPEATED_BASE_P (ref) = 1;
9874 TYPE_MARKED_P (BINFO_TYPE (base_binfo)) = 1;
9876 for (base_binfo = binfo; base_binfo;
9877 base_binfo = TREE_CHAIN (base_binfo))
9878 if (TYPE_MARKED_P (BINFO_TYPE (base_binfo)))
9879 TYPE_MARKED_P (BINFO_TYPE (base_binfo)) = 0;
9886 /* Begin compiling the definition of an enumeration type.
9888 Returns the type object, as yet incomplete.
9889 Also records info about it so that build_enumerator
9890 may be used to declare the individual values as they are read. */
9893 start_enum (tree name)
9897 gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE);
9899 /* If this is the real definition for a previous forward reference,
9900 fill in the contents in the same object that used to be the
9901 forward reference. */
9903 enumtype = lookup_and_check_tag (enum_type, name,
9904 /*tag_scope=*/ts_current,
9905 /*template_header_p=*/false);
9907 if (enumtype != NULL_TREE && TREE_CODE (enumtype) == ENUMERAL_TYPE)
9909 error ("multiple definition of %q#T", enumtype);
9910 error ("%Jprevious definition here", TYPE_MAIN_DECL (enumtype));
9911 /* Clear out TYPE_VALUES, and start again. */
9912 TYPE_VALUES (enumtype) = NULL_TREE;
9916 /* In case of error, make a dummy enum to allow parsing to
9918 if (enumtype == error_mark_node)
9919 name = make_anon_name ();
9921 enumtype = make_node (ENUMERAL_TYPE);
9922 enumtype = pushtag (name, enumtype, /*tag_scope=*/ts_current);
9928 /* After processing and defining all the values of an enumeration type,
9929 install their decls in the enumeration type and finish it off.
9930 ENUMTYPE is the type object and VALUES a list of name-value pairs. */
9933 finish_enum (tree enumtype)
9942 bool use_short_enum;
9946 integer_type_kind itk;
9947 tree underlying_type = NULL_TREE;
9949 /* We built up the VALUES in reverse order. */
9950 TYPE_VALUES (enumtype) = nreverse (TYPE_VALUES (enumtype));
9952 /* For an enum defined in a template, just set the type of the values;
9953 all further processing is postponed until the template is
9954 instantiated. We need to set the type so that tsubst of a CONST_DECL
9956 if (processing_template_decl)
9958 for (values = TYPE_VALUES (enumtype);
9960 values = TREE_CHAIN (values))
9961 TREE_TYPE (TREE_VALUE (values)) = enumtype;
9962 if (at_function_scope_p ())
9963 add_stmt (build_min (TAG_DEFN, enumtype));
9967 /* Determine the minimum and maximum values of the enumerators. */
9968 if (TYPE_VALUES (enumtype))
9970 minnode = maxnode = NULL_TREE;
9972 for (values = TYPE_VALUES (enumtype);
9974 values = TREE_CHAIN (values))
9976 decl = TREE_VALUE (values);
9978 /* [dcl.enum]: Following the closing brace of an enum-specifier,
9979 each enumerator has the type of its enumeration. Prior to the
9980 closing brace, the type of each enumerator is the type of its
9981 initializing value. */
9982 TREE_TYPE (decl) = enumtype;
9984 /* Update the minimum and maximum values, if appropriate. */
9985 value = DECL_INITIAL (decl);
9986 if (value == error_mark_node)
9987 value = integer_zero_node;
9988 /* Figure out what the minimum and maximum values of the
9991 minnode = maxnode = value;
9992 else if (tree_int_cst_lt (maxnode, value))
9994 else if (tree_int_cst_lt (value, minnode))
10001 If the enumerator-list is empty, the underlying type is as if
10002 the enumeration had a single enumerator with value 0. */
10003 minnode = maxnode = integer_zero_node;
10005 /* Compute the number of bits require to represent all values of the
10006 enumeration. We must do this before the type of MINNODE and
10007 MAXNODE are transformed, since min_precision relies on the
10008 TREE_TYPE of the value it is passed. */
10009 unsignedp = tree_int_cst_sgn (minnode) >= 0;
10010 lowprec = min_precision (minnode, unsignedp);
10011 highprec = min_precision (maxnode, unsignedp);
10012 precision = MAX (lowprec, highprec);
10014 /* Determine the underlying type of the enumeration.
10018 The underlying type of an enumeration is an integral type that
10019 can represent all the enumerator values defined in the
10020 enumeration. It is implementation-defined which integral type is
10021 used as the underlying type for an enumeration except that the
10022 underlying type shall not be larger than int unless the value of
10023 an enumerator cannot fit in an int or unsigned int.
10025 We use "int" or an "unsigned int" as the underlying type, even if
10026 a smaller integral type would work, unless the user has
10027 explicitly requested that we use the smallest possible type. The
10028 user can request that for all enumerations with a command line
10029 flag, or for just one enumeration with an attribute. */
10031 use_short_enum = flag_short_enums
10032 || lookup_attribute ("packed", TYPE_ATTRIBUTES (enumtype));
10034 for (itk = (use_short_enum ? itk_char : itk_int);
10038 underlying_type = integer_types[itk];
10039 if (TYPE_PRECISION (underlying_type) >= precision
10040 && TYPE_UNSIGNED (underlying_type) == unsignedp)
10043 if (itk == itk_none)
10047 IF no integral type can represent all the enumerator values, the
10048 enumeration is ill-formed. */
10049 error ("no integral type can represent all of the enumerator values "
10050 "for %qT", enumtype);
10051 precision = TYPE_PRECISION (long_long_integer_type_node);
10052 underlying_type = integer_types[itk_unsigned_long_long];
10055 /* Compute the minium and maximum values for the type.
10059 For an enumeration where emin is the smallest enumerator and emax
10060 is the largest, the values of the enumeration are the values of the
10061 underlying type in the range bmin to bmax, where bmin and bmax are,
10062 respectively, the smallest and largest values of the smallest bit-
10063 field that can store emin and emax. */
10065 /* The middle-end currently assumes that types with TYPE_PRECISION
10066 narrower than their underlying type are suitably zero or sign
10067 extended to fill their mode. g++ doesn't make these guarantees.
10068 Until the middle-end can represent such paradoxical types, we
10069 set the TYPE_PRECISION to the width of the underlying type. */
10070 TYPE_PRECISION (enumtype) = TYPE_PRECISION (underlying_type);
10072 set_min_and_max_values_for_integral_type (enumtype, precision, unsignedp);
10076 The value of sizeof() applied to an enumeration type, an object
10077 of an enumeration type, or an enumerator, is the value of sizeof()
10078 applied to the underlying type. */
10079 TYPE_SIZE (enumtype) = TYPE_SIZE (underlying_type);
10080 TYPE_SIZE_UNIT (enumtype) = TYPE_SIZE_UNIT (underlying_type);
10081 TYPE_MODE (enumtype) = TYPE_MODE (underlying_type);
10082 TYPE_ALIGN (enumtype) = TYPE_ALIGN (underlying_type);
10083 TYPE_USER_ALIGN (enumtype) = TYPE_USER_ALIGN (underlying_type);
10084 TYPE_UNSIGNED (enumtype) = TYPE_UNSIGNED (underlying_type);
10086 /* Convert each of the enumerators to the type of the underlying
10087 type of the enumeration. */
10088 for (values = TYPE_VALUES (enumtype); values; values = TREE_CHAIN (values))
10090 location_t saved_location;
10092 decl = TREE_VALUE (values);
10093 saved_location = input_location;
10094 input_location = DECL_SOURCE_LOCATION (decl);
10095 value = perform_implicit_conversion (underlying_type,
10096 DECL_INITIAL (decl));
10097 input_location = saved_location;
10099 /* Do not clobber shared ints. */
10100 value = copy_node (value);
10102 TREE_TYPE (value) = enumtype;
10103 DECL_INITIAL (decl) = value;
10104 TREE_VALUE (values) = value;
10107 /* Fix up all variant types of this enum type. */
10108 for (t = TYPE_MAIN_VARIANT (enumtype); t; t = TYPE_NEXT_VARIANT (t))
10110 TYPE_VALUES (t) = TYPE_VALUES (enumtype);
10111 TYPE_MIN_VALUE (t) = TYPE_MIN_VALUE (enumtype);
10112 TYPE_MAX_VALUE (t) = TYPE_MAX_VALUE (enumtype);
10113 TYPE_SIZE (t) = TYPE_SIZE (enumtype);
10114 TYPE_SIZE_UNIT (t) = TYPE_SIZE_UNIT (enumtype);
10115 TYPE_MODE (t) = TYPE_MODE (enumtype);
10116 TYPE_PRECISION (t) = TYPE_PRECISION (enumtype);
10117 TYPE_ALIGN (t) = TYPE_ALIGN (enumtype);
10118 TYPE_USER_ALIGN (t) = TYPE_USER_ALIGN (enumtype);
10119 TYPE_UNSIGNED (t) = TYPE_UNSIGNED (enumtype);
10122 /* Finish debugging output for this type. */
10123 rest_of_type_compilation (enumtype, namespace_bindings_p ());
10126 /* Build and install a CONST_DECL for an enumeration constant of the
10127 enumeration type ENUMTYPE whose NAME and VALUE (if any) are provided.
10128 Assignment of sequential values by default is handled here. */
10131 build_enumerator (tree name, tree value, tree enumtype)
10137 /* If the VALUE was erroneous, pretend it wasn't there; that will
10138 result in the enum being assigned the next value in sequence. */
10139 if (value == error_mark_node)
10142 /* Remove no-op casts from the value. */
10144 STRIP_TYPE_NOPS (value);
10146 if (! processing_template_decl)
10148 /* Validate and default VALUE. */
10149 if (value != NULL_TREE)
10151 value = integral_constant_value (value);
10153 if (TREE_CODE (value) == INTEGER_CST)
10155 value = perform_integral_promotions (value);
10156 constant_expression_warning (value);
10160 error ("enumerator value for %qD not integer constant", name);
10165 /* Default based on previous value. */
10166 if (value == NULL_TREE)
10168 if (TYPE_VALUES (enumtype))
10171 unsigned HOST_WIDE_INT lo;
10175 /* The next value is the previous value plus one. We can
10176 safely assume that the previous value is an INTEGER_CST.
10177 add_double doesn't know the type of the target expression,
10178 so we must check with int_fits_type_p as well. */
10179 prev_value = DECL_INITIAL (TREE_VALUE (TYPE_VALUES (enumtype)));
10180 overflowed = add_double (TREE_INT_CST_LOW (prev_value),
10181 TREE_INT_CST_HIGH (prev_value),
10183 value = build_int_cst_wide (TREE_TYPE (prev_value), lo, hi);
10184 overflowed |= !int_fits_type_p (value, TREE_TYPE (prev_value));
10188 error ("overflow in enumeration values at %qD", name);
10189 value = error_mark_node;
10193 value = integer_zero_node;
10196 /* Remove no-op casts from the value. */
10197 STRIP_TYPE_NOPS (value);
10200 /* C++ associates enums with global, function, or class declarations. */
10201 context = current_scope ();
10203 /* Build the actual enumeration constant. Note that the enumeration
10204 constants have the type of their initializers until the
10205 enumeration is complete:
10209 Following the closing brace of an enum-specifier, each enumer-
10210 ator has the type of its enumeration. Prior to the closing
10211 brace, the type of each enumerator is the type of its
10212 initializing value.
10214 In finish_enum we will reset the type. Of course, if we're
10215 processing a template, there may be no value. */
10216 type = value ? TREE_TYPE (value) : NULL_TREE;
10218 if (context && context == current_class_type)
10219 /* This enum declaration is local to the class. We need the full
10220 lang_decl so that we can record DECL_CLASS_CONTEXT, for example. */
10221 decl = build_lang_decl (CONST_DECL, name, type);
10223 /* It's a global enum, or it's local to a function. (Note local to
10224 a function could mean local to a class method. */
10225 decl = build_decl (CONST_DECL, name, type);
10227 DECL_CONTEXT (decl) = FROB_CONTEXT (context);
10228 TREE_CONSTANT (decl) = 1;
10229 TREE_INVARIANT (decl) = 1;
10230 TREE_READONLY (decl) = 1;
10231 DECL_INITIAL (decl) = value;
10233 if (context && context == current_class_type)
10234 /* In something like `struct S { enum E { i = 7 }; };' we put `i'
10235 on the TYPE_FIELDS list for `S'. (That's so that you can say
10236 things like `S::i' later.) */
10237 finish_member_declaration (decl);
10241 /* Add this enumeration constant to the list for this type. */
10242 TYPE_VALUES (enumtype) = tree_cons (name, decl, TYPE_VALUES (enumtype));
10246 /* We're defining DECL. Make sure that it's type is OK. */
10249 check_function_type (tree decl, tree current_function_parms)
10251 tree fntype = TREE_TYPE (decl);
10252 tree return_type = complete_type (TREE_TYPE (fntype));
10254 /* In a function definition, arg types must be complete. */
10255 require_complete_types_for_parms (current_function_parms);
10257 if (dependent_type_p (return_type))
10259 if (!COMPLETE_OR_VOID_TYPE_P (return_type))
10261 tree args = TYPE_ARG_TYPES (fntype);
10263 error ("return type %q#T is incomplete", return_type);
10265 /* Make it return void instead. */
10266 if (TREE_CODE (fntype) == METHOD_TYPE)
10267 fntype = build_method_type_directly (TREE_TYPE (TREE_VALUE (args)),
10269 TREE_CHAIN (args));
10271 fntype = build_function_type (void_type_node, args);
10273 = build_exception_variant (fntype,
10274 TYPE_RAISES_EXCEPTIONS (TREE_TYPE (decl)));
10277 abstract_virtuals_error (decl, TREE_TYPE (fntype));
10280 /* Create the FUNCTION_DECL for a function definition.
10281 DECLSPECS and DECLARATOR are the parts of the declaration;
10282 they describe the function's name and the type it returns,
10283 but twisted together in a fashion that parallels the syntax of C.
10285 FLAGS is a bitwise or of SF_PRE_PARSED (indicating that the
10286 DECLARATOR is really the DECL for the function we are about to
10287 process and that DECLSPECS should be ignored), SF_INCLASS_INLINE
10288 indicating that the function is an inline defined in-class.
10290 This function creates a binding context for the function body
10291 as well as setting up the FUNCTION_DECL in current_function_decl.
10293 For C++, we must first check whether that datum makes any sense.
10294 For example, "class A local_a(1,2);" means that variable local_a
10295 is an aggregate of type A, which should have a constructor
10296 applied to it with the argument list [1, 2]. */
10299 start_preparsed_function (tree decl1, tree attrs, int flags)
10301 tree ctype = NULL_TREE;
10304 int doing_friend = 0;
10305 struct cp_binding_level *bl;
10306 tree current_function_parms;
10307 struct c_fileinfo *finfo
10308 = get_fileinfo (lbasename (LOCATION_FILE (DECL_SOURCE_LOCATION (decl1))));
10309 bool honor_interface;
10311 /* Sanity check. */
10312 gcc_assert (TREE_CODE (TREE_VALUE (void_list_node)) == VOID_TYPE);
10313 gcc_assert (TREE_CHAIN (void_list_node) == NULL_TREE);
10315 fntype = TREE_TYPE (decl1);
10316 if (TREE_CODE (fntype) == METHOD_TYPE)
10317 ctype = TYPE_METHOD_BASETYPE (fntype);
10319 /* ISO C++ 11.4/5. A friend function defined in a class is in
10320 the (lexical) scope of the class in which it is defined. */
10321 if (!ctype && DECL_FRIEND_P (decl1))
10323 ctype = DECL_FRIEND_CONTEXT (decl1);
10325 /* CTYPE could be null here if we're dealing with a template;
10326 for example, `inline friend float foo()' inside a template
10327 will have no CTYPE set. */
10328 if (ctype && TREE_CODE (ctype) != RECORD_TYPE)
10334 if (DECL_DECLARED_INLINE_P (decl1)
10335 && lookup_attribute ("noinline", attrs))
10336 warning (0, "inline function %q+D given attribute noinline", decl1);
10338 if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (decl1))
10339 /* This is a constructor, we must ensure that any default args
10340 introduced by this definition are propagated to the clones
10341 now. The clones are used directly in overload resolution. */
10342 adjust_clone_args (decl1);
10344 /* Sometimes we don't notice that a function is a static member, and
10345 build a METHOD_TYPE for it. Fix that up now. */
10346 if (ctype != NULL_TREE && DECL_STATIC_FUNCTION_P (decl1)
10347 && TREE_CODE (TREE_TYPE (decl1)) == METHOD_TYPE)
10349 revert_static_member_fn (decl1);
10353 /* Set up current_class_type, and enter the scope of the class, if
10356 push_nested_class (ctype);
10357 else if (DECL_STATIC_FUNCTION_P (decl1))
10358 push_nested_class (DECL_CONTEXT (decl1));
10360 /* Now that we have entered the scope of the class, we must restore
10361 the bindings for any template parameters surrounding DECL1, if it
10362 is an inline member template. (Order is important; consider the
10363 case where a template parameter has the same name as a field of
10364 the class.) It is not until after this point that
10365 PROCESSING_TEMPLATE_DECL is guaranteed to be set up correctly. */
10366 if (flags & SF_INCLASS_INLINE)
10367 maybe_begin_member_template_processing (decl1);
10369 /* Effective C++ rule 15. */
10371 && DECL_OVERLOADED_OPERATOR_P (decl1) == NOP_EXPR
10372 && TREE_CODE (TREE_TYPE (fntype)) == VOID_TYPE)
10373 warning (OPT_Weffc__, "%<operator=%> should return a reference to %<*this%>");
10375 /* Make the init_value nonzero so pushdecl knows this is not tentative.
10376 error_mark_node is replaced below (in poplevel) with the BLOCK. */
10377 if (!DECL_INITIAL (decl1))
10378 DECL_INITIAL (decl1) = error_mark_node;
10380 /* This function exists in static storage.
10381 (This does not mean `static' in the C sense!) */
10382 TREE_STATIC (decl1) = 1;
10384 /* We must call push_template_decl after current_class_type is set
10385 up. (If we are processing inline definitions after exiting a
10386 class scope, current_class_type will be NULL_TREE until set above
10387 by push_nested_class.) */
10388 if (processing_template_decl)
10390 /* FIXME: Handle error_mark_node more gracefully. */
10391 tree newdecl1 = push_template_decl (decl1);
10392 if (newdecl1 != error_mark_node)
10396 /* We are now in the scope of the function being defined. */
10397 current_function_decl = decl1;
10399 /* Save the parm names or decls from this function's declarator
10400 where store_parm_decls will find them. */
10401 current_function_parms = DECL_ARGUMENTS (decl1);
10403 /* Make sure the parameter and return types are reasonable. When
10404 you declare a function, these types can be incomplete, but they
10405 must be complete when you define the function. */
10406 check_function_type (decl1, current_function_parms);
10407 /* Make sure no default arg is missing. */
10408 check_default_args (decl1);
10410 /* Build the return declaration for the function. */
10411 restype = TREE_TYPE (fntype);
10412 /* Promote the value to int before returning it. */
10413 if (c_promoting_integer_type_p (restype))
10414 restype = type_promotes_to (restype);
10415 if (DECL_RESULT (decl1) == NULL_TREE)
10419 resdecl = build_decl (RESULT_DECL, 0, TYPE_MAIN_VARIANT (restype));
10420 DECL_ARTIFICIAL (resdecl) = 1;
10421 DECL_IGNORED_P (resdecl) = 1;
10422 DECL_RESULT (decl1) = resdecl;
10424 cp_apply_type_quals_to_decl (cp_type_quals (restype), resdecl);
10427 /* Initialize RTL machinery. We cannot do this until
10428 CURRENT_FUNCTION_DECL and DECL_RESULT are set up. We do this
10429 even when processing a template; this is how we get
10430 CFUN set up, and our per-function variables initialized.
10431 FIXME factor out the non-RTL stuff. */
10432 bl = current_binding_level;
10433 allocate_struct_function (decl1);
10434 current_binding_level = bl;
10436 /* Even though we're inside a function body, we still don't want to
10437 call expand_expr to calculate the size of a variable-sized array.
10438 We haven't necessarily assigned RTL to all variables yet, so it's
10439 not safe to try to expand expressions involving them. */
10440 cfun->x_dont_save_pending_sizes_p = 1;
10442 /* Start the statement-tree, start the tree now. */
10443 DECL_SAVED_TREE (decl1) = push_stmt_list ();
10445 /* Let the user know we're compiling this function. */
10446 announce_function (decl1);
10448 /* Record the decl so that the function name is defined.
10449 If we already have a decl for this name, and it is a FUNCTION_DECL,
10450 use the old decl. */
10451 if (!processing_template_decl && !(flags & SF_PRE_PARSED))
10453 /* A specialization is not used to guide overload resolution. */
10454 if (!DECL_FUNCTION_MEMBER_P (decl1)
10455 && !(DECL_USE_TEMPLATE (decl1) &&
10456 PRIMARY_TEMPLATE_P (DECL_TI_TEMPLATE (decl1))))
10458 tree olddecl = pushdecl (decl1);
10460 if (olddecl == error_mark_node)
10461 /* If something went wrong when registering the declaration,
10462 use DECL1; we have to have a FUNCTION_DECL to use when
10463 parsing the body of the function. */
10466 /* Otherwise, OLDDECL is either a previous declaration of
10467 the same function or DECL1 itself. */
10472 /* We need to set the DECL_CONTEXT. */
10473 if (!DECL_CONTEXT (decl1) && DECL_TEMPLATE_INFO (decl1))
10474 DECL_CONTEXT (decl1) = DECL_CONTEXT (DECL_TI_TEMPLATE (decl1));
10476 fntype = TREE_TYPE (decl1);
10478 /* If #pragma weak applies, mark the decl appropriately now.
10479 The pragma only applies to global functions. Because
10480 determining whether or not the #pragma applies involves
10481 computing the mangled name for the declaration, we cannot
10482 apply the pragma until after we have merged this declaration
10483 with any previous declarations; if the original declaration
10484 has a linkage specification, that specification applies to
10485 the definition as well, and may affect the mangled name. */
10486 if (!DECL_CONTEXT (decl1))
10487 maybe_apply_pragma_weak (decl1);
10490 /* Reset these in case the call to pushdecl changed them. */
10491 current_function_decl = decl1;
10492 cfun->decl = decl1;
10494 /* If we are (erroneously) defining a function that we have already
10495 defined before, wipe out what we knew before. */
10496 if (!DECL_PENDING_INLINE_P (decl1))
10497 DECL_SAVED_FUNCTION_DATA (decl1) = NULL;
10499 if (ctype && !doing_friend && !DECL_STATIC_FUNCTION_P (decl1))
10501 /* We know that this was set up by `grokclassfn'. We do not
10502 wait until `store_parm_decls', since evil parse errors may
10503 never get us to that point. Here we keep the consistency
10504 between `current_class_type' and `current_class_ptr'. */
10505 tree t = DECL_ARGUMENTS (decl1);
10507 gcc_assert (t != NULL_TREE && TREE_CODE (t) == PARM_DECL);
10508 gcc_assert (TREE_CODE (TREE_TYPE (t)) == POINTER_TYPE);
10510 cp_function_chain->x_current_class_ref
10511 = build_indirect_ref (t, NULL);
10512 cp_function_chain->x_current_class_ptr = t;
10514 /* Constructors and destructors need to know whether they're "in
10515 charge" of initializing virtual base classes. */
10516 t = TREE_CHAIN (t);
10517 if (DECL_HAS_IN_CHARGE_PARM_P (decl1))
10519 current_in_charge_parm = t;
10520 t = TREE_CHAIN (t);
10522 if (DECL_HAS_VTT_PARM_P (decl1))
10524 gcc_assert (DECL_NAME (t) == vtt_parm_identifier);
10525 current_vtt_parm = t;
10529 honor_interface = (!DECL_TEMPLATE_INSTANTIATION (decl1)
10530 /* Implicitly-defined methods (like the
10531 destructor for a class in which no destructor
10532 is explicitly declared) must not be defined
10533 until their definition is needed. So, we
10534 ignore interface specifications for
10535 compiler-generated functions. */
10536 && !DECL_ARTIFICIAL (decl1));
10538 if (DECL_INTERFACE_KNOWN (decl1))
10540 tree ctx = decl_function_context (decl1);
10542 if (DECL_NOT_REALLY_EXTERN (decl1))
10543 DECL_EXTERNAL (decl1) = 0;
10545 if (ctx != NULL_TREE && DECL_DECLARED_INLINE_P (ctx)
10546 && TREE_PUBLIC (ctx))
10547 /* This is a function in a local class in an extern inline
10549 comdat_linkage (decl1);
10551 /* If this function belongs to an interface, it is public.
10552 If it belongs to someone else's interface, it is also external.
10553 This only affects inlines and template instantiations. */
10554 else if (!finfo->interface_unknown && honor_interface)
10556 if (DECL_DECLARED_INLINE_P (decl1)
10557 || DECL_TEMPLATE_INSTANTIATION (decl1)
10558 || processing_template_decl)
10560 DECL_EXTERNAL (decl1)
10561 = (finfo->interface_only
10562 || (DECL_DECLARED_INLINE_P (decl1)
10563 && ! flag_implement_inlines
10564 && !DECL_VINDEX (decl1)));
10566 /* For WIN32 we also want to put these in linkonce sections. */
10567 maybe_make_one_only (decl1);
10570 DECL_EXTERNAL (decl1) = 0;
10571 DECL_INTERFACE_KNOWN (decl1) = 1;
10572 /* If this function is in an interface implemented in this file,
10573 make sure that the backend knows to emit this function
10575 if (!DECL_EXTERNAL (decl1))
10576 mark_needed (decl1);
10578 else if (finfo->interface_unknown && finfo->interface_only
10579 && honor_interface)
10581 /* If MULTIPLE_SYMBOL_SPACES is defined and we saw a #pragma
10582 interface, we will have both finfo->interface_unknown and
10583 finfo->interface_only set. In that case, we don't want to
10584 use the normal heuristics because someone will supply a
10585 #pragma implementation elsewhere, and deducing it here would
10586 produce a conflict. */
10587 comdat_linkage (decl1);
10588 DECL_EXTERNAL (decl1) = 0;
10589 DECL_INTERFACE_KNOWN (decl1) = 1;
10590 DECL_DEFER_OUTPUT (decl1) = 1;
10594 /* This is a definition, not a reference.
10595 So clear DECL_EXTERNAL. */
10596 DECL_EXTERNAL (decl1) = 0;
10598 if ((DECL_DECLARED_INLINE_P (decl1)
10599 || DECL_TEMPLATE_INSTANTIATION (decl1))
10600 && ! DECL_INTERFACE_KNOWN (decl1)
10601 /* Don't try to defer nested functions for now. */
10602 && ! decl_function_context (decl1))
10603 DECL_DEFER_OUTPUT (decl1) = 1;
10605 DECL_INTERFACE_KNOWN (decl1) = 1;
10608 /* Determine the ELF visibility attribute for the function. We must not
10609 do this before calling "pushdecl", as we must allow "duplicate_decls"
10610 to merge any attributes appropriately. We also need to wait until
10612 if (!DECL_CLONED_FUNCTION_P (decl1))
10613 determine_visibility (decl1);
10615 begin_scope (sk_function_parms, decl1);
10619 if (DECL_DESTRUCTOR_P (decl1)
10620 || (DECL_CONSTRUCTOR_P (decl1)
10621 && targetm.cxx.cdtor_returns_this ()))
10623 cdtor_label = build_decl (LABEL_DECL, NULL_TREE, NULL_TREE);
10624 DECL_CONTEXT (cdtor_label) = current_function_decl;
10627 start_fname_decls ();
10629 store_parm_decls (current_function_parms);
10633 /* Like start_preparsed_function, except that instead of a
10634 FUNCTION_DECL, this function takes DECLSPECS and DECLARATOR.
10636 Returns 1 on success. If the DECLARATOR is not suitable for a function
10637 (it defines a datum instead), we return 0, which tells
10638 yyparse to report a parse error. */
10641 start_function (cp_decl_specifier_seq *declspecs,
10642 const cp_declarator *declarator,
10647 decl1 = grokdeclarator (declarator, declspecs, FUNCDEF, 1, &attrs);
10648 /* If the declarator is not suitable for a function definition,
10649 cause a syntax error. */
10650 if (decl1 == NULL_TREE || TREE_CODE (decl1) != FUNCTION_DECL)
10653 if (DECL_MAIN_P (decl1))
10654 /* main must return int. grokfndecl should have corrected it
10655 (and issued a diagnostic) if the user got it wrong. */
10656 gcc_assert (same_type_p (TREE_TYPE (TREE_TYPE (decl1)),
10657 integer_type_node));
10659 start_preparsed_function (decl1, attrs, /*flags=*/SF_DEFAULT);
10664 /* Returns true iff an EH_SPEC_BLOCK should be created in the body of
10668 use_eh_spec_block (tree fn)
10670 return (flag_exceptions && flag_enforce_eh_specs
10671 && !processing_template_decl
10672 && TYPE_RAISES_EXCEPTIONS (TREE_TYPE (fn))
10673 /* We insert the EH_SPEC_BLOCK only in the original
10674 function; then, it is copied automatically to the
10676 && !DECL_CLONED_FUNCTION_P (fn)
10677 /* Implicitly-generated constructors and destructors have
10678 exception specifications. However, those specifications
10679 are the union of the possible exceptions specified by the
10680 constructors/destructors for bases and members, so no
10681 unallowed exception will ever reach this function. By
10682 not creating the EH_SPEC_BLOCK we save a little memory,
10683 and we avoid spurious warnings about unreachable
10685 && !DECL_ARTIFICIAL (fn));
10688 /* Store the parameter declarations into the current function declaration.
10689 This is called after parsing the parameter declarations, before
10690 digesting the body of the function.
10692 Also install to binding contour return value identifier, if any. */
10695 store_parm_decls (tree current_function_parms)
10697 tree fndecl = current_function_decl;
10700 /* This is a chain of any other decls that came in among the parm
10701 declarations. If a parm is declared with enum {foo, bar} x;
10702 then CONST_DECLs for foo and bar are put here. */
10703 tree nonparms = NULL_TREE;
10705 if (current_function_parms)
10707 /* This case is when the function was defined with an ANSI prototype.
10708 The parms already have decls, so we need not do anything here
10709 except record them as in effect
10710 and complain if any redundant old-style parm decls were written. */
10712 tree specparms = current_function_parms;
10715 /* Must clear this because it might contain TYPE_DECLs declared
10717 current_binding_level->names = NULL;
10719 /* If we're doing semantic analysis, then we'll call pushdecl
10720 for each of these. We must do them in reverse order so that
10721 they end in the correct forward order. */
10722 specparms = nreverse (specparms);
10724 for (parm = specparms; parm; parm = next)
10726 next = TREE_CHAIN (parm);
10727 if (TREE_CODE (parm) == PARM_DECL)
10729 if (DECL_NAME (parm) == NULL_TREE
10730 || TREE_CODE (parm) != VOID_TYPE)
10733 error ("parameter %qD declared void", parm);
10737 /* If we find an enum constant or a type tag,
10738 put it aside for the moment. */
10739 TREE_CHAIN (parm) = NULL_TREE;
10740 nonparms = chainon (nonparms, parm);
10744 /* Get the decls in their original chain order and record in the
10745 function. This is all and only the PARM_DECLs that were
10746 pushed into scope by the loop above. */
10747 DECL_ARGUMENTS (fndecl) = getdecls ();
10750 DECL_ARGUMENTS (fndecl) = NULL_TREE;
10752 /* Now store the final chain of decls for the arguments
10753 as the decl-chain of the current lexical scope.
10754 Put the enumerators in as well, at the front so that
10755 DECL_ARGUMENTS is not modified. */
10756 current_binding_level->names = chainon (nonparms, DECL_ARGUMENTS (fndecl));
10758 if (use_eh_spec_block (current_function_decl))
10759 current_eh_spec_block = begin_eh_spec_block ();
10763 /* We have finished doing semantic analysis on DECL, but have not yet
10764 generated RTL for its body. Save away our current state, so that
10765 when we want to generate RTL later we know what to do. */
10768 save_function_data (tree decl)
10770 struct language_function *f;
10772 /* Save the language-specific per-function data so that we can
10773 get it back when we really expand this function. */
10774 gcc_assert (!DECL_PENDING_INLINE_P (decl));
10777 f = GGC_NEW (struct language_function);
10778 memcpy (f, cp_function_chain, sizeof (struct language_function));
10779 DECL_SAVED_FUNCTION_DATA (decl) = f;
10781 /* Clear out the bits we don't need. */
10782 f->base.x_stmt_tree.x_cur_stmt_list = NULL_TREE;
10783 f->bindings = NULL;
10784 f->x_local_names = NULL;
10788 /* Set the return value of the constructor (if present). */
10791 finish_constructor_body (void)
10796 if (targetm.cxx.cdtor_returns_this ())
10798 /* Any return from a constructor will end up here. */
10799 add_stmt (build_stmt (LABEL_EXPR, cdtor_label));
10801 val = DECL_ARGUMENTS (current_function_decl);
10802 val = build2 (MODIFY_EXPR, TREE_TYPE (val),
10803 DECL_RESULT (current_function_decl), val);
10804 /* Return the address of the object. */
10805 exprstmt = build_stmt (RETURN_EXPR, val);
10806 add_stmt (exprstmt);
10810 /* Do all the processing for the beginning of a destructor; set up the
10811 vtable pointers and cleanups for bases and members. */
10814 begin_destructor_body (void)
10816 tree compound_stmt;
10818 /* If the CURRENT_CLASS_TYPE is incomplete, we will have already
10819 issued an error message. We still want to try to process the
10820 body of the function, but initialize_vtbl_ptrs will crash if
10821 TYPE_BINFO is NULL. */
10822 if (COMPLETE_TYPE_P (current_class_type))
10824 compound_stmt = begin_compound_stmt (0);
10825 /* Make all virtual function table pointers in non-virtual base
10826 classes point to CURRENT_CLASS_TYPE's virtual function
10828 initialize_vtbl_ptrs (current_class_ptr);
10829 finish_compound_stmt (compound_stmt);
10831 /* And insert cleanups for our bases and members so that they
10832 will be properly destroyed if we throw. */
10833 push_base_cleanups ();
10837 /* At the end of every destructor we generate code to delete the object if
10838 necessary. Do that now. */
10841 finish_destructor_body (void)
10845 /* Any return from a destructor will end up here; that way all base
10846 and member cleanups will be run when the function returns. */
10847 add_stmt (build_stmt (LABEL_EXPR, cdtor_label));
10849 /* In a virtual destructor, we must call delete. */
10850 if (DECL_VIRTUAL_P (current_function_decl))
10853 tree virtual_size = cxx_sizeof (current_class_type);
10857 At the point of definition of a virtual destructor (including
10858 an implicit definition), non-placement operator delete shall
10859 be looked up in the scope of the destructor's class and if
10860 found shall be accessible and unambiguous. */
10861 exprstmt = build_op_delete_call(DELETE_EXPR, current_class_ptr,
10863 /*global_p=*/false,
10864 /*placement=*/NULL_TREE,
10865 /*alloc_fn=*/NULL_TREE);
10867 if_stmt = begin_if_stmt ();
10868 finish_if_stmt_cond (build2 (BIT_AND_EXPR, integer_type_node,
10869 current_in_charge_parm,
10872 finish_expr_stmt (exprstmt);
10873 finish_then_clause (if_stmt);
10874 finish_if_stmt (if_stmt);
10877 if (targetm.cxx.cdtor_returns_this ())
10881 val = DECL_ARGUMENTS (current_function_decl);
10882 val = build2 (MODIFY_EXPR, TREE_TYPE (val),
10883 DECL_RESULT (current_function_decl), val);
10884 /* Return the address of the object. */
10885 exprstmt = build_stmt (RETURN_EXPR, val);
10886 add_stmt (exprstmt);
10890 /* Do the necessary processing for the beginning of a function body, which
10891 in this case includes member-initializers, but not the catch clauses of
10892 a function-try-block. Currently, this means opening a binding level
10893 for the member-initializers (in a ctor) and member cleanups (in a dtor). */
10896 begin_function_body (void)
10900 if (! FUNCTION_NEEDS_BODY_BLOCK (current_function_decl))
10903 if (processing_template_decl)
10904 /* Do nothing now. */;
10906 /* Always keep the BLOCK node associated with the outermost pair of
10907 curly braces of a function. These are needed for correct
10908 operation of dwarfout.c. */
10909 keep_next_level (true);
10911 stmt = begin_compound_stmt (BCS_FN_BODY);
10913 if (processing_template_decl)
10914 /* Do nothing now. */;
10915 else if (DECL_DESTRUCTOR_P (current_function_decl))
10916 begin_destructor_body ();
10921 /* Do the processing for the end of a function body. Currently, this means
10922 closing out the cleanups for fully-constructed bases and members, and in
10923 the case of the destructor, deleting the object if desired. Again, this
10924 is only meaningful for [cd]tors, since they are the only functions where
10925 there is a significant distinction between the main body and any
10926 function catch clauses. Handling, say, main() return semantics here
10927 would be wrong, as flowing off the end of a function catch clause for
10928 main() would also need to return 0. */
10931 finish_function_body (tree compstmt)
10933 if (compstmt == NULL_TREE)
10936 /* Close the block. */
10937 finish_compound_stmt (compstmt);
10939 if (processing_template_decl)
10940 /* Do nothing now. */;
10941 else if (DECL_CONSTRUCTOR_P (current_function_decl))
10942 finish_constructor_body ();
10943 else if (DECL_DESTRUCTOR_P (current_function_decl))
10944 finish_destructor_body ();
10947 /* Given a function, returns the BLOCK corresponding to the outermost level
10948 of curly braces, skipping the artificial block created for constructor
10952 outer_curly_brace_block (tree fndecl)
10954 tree block = BLOCK_SUBBLOCKS (DECL_INITIAL (fndecl));
10955 if (FUNCTION_NEEDS_BODY_BLOCK (current_function_decl))
10956 /* Skip the artificial function body block. */
10957 block = BLOCK_SUBBLOCKS (block);
10961 /* Finish up a function declaration and compile that function
10962 all the way to assembler language output. The free the storage
10963 for the function definition.
10965 FLAGS is a bitwise or of the following values:
10967 We just finished processing the body of an in-class inline
10968 function definition. (This processing will have taken place
10969 after the class definition is complete.) */
10972 finish_function (int flags)
10974 tree fndecl = current_function_decl;
10975 tree fntype, ctype = NULL_TREE;
10976 int inclass_inline = (flags & 2) != 0;
10979 /* When we get some parse errors, we can end up without a
10980 current_function_decl, so cope. */
10981 if (fndecl == NULL_TREE)
10982 return error_mark_node;
10984 if (DECL_NONSTATIC_MEMBER_FUNCTION_P (fndecl)
10985 && DECL_VIRTUAL_P (fndecl)
10986 && !processing_template_decl)
10988 tree fnclass = DECL_CONTEXT (fndecl);
10989 if (fndecl == CLASSTYPE_KEY_METHOD (fnclass))
10990 keyed_classes = tree_cons (NULL_TREE, fnclass, keyed_classes);
10993 nested = function_depth > 1;
10994 fntype = TREE_TYPE (fndecl);
10996 /* TREE_READONLY (fndecl) = 1;
10997 This caused &foo to be of type ptr-to-const-function
10998 which then got a warning when stored in a ptr-to-function variable. */
11000 gcc_assert (building_stmt_tree ());
11002 /* For a cloned function, we've already got all the code we need;
11003 there's no need to add any extra bits. */
11004 if (!DECL_CLONED_FUNCTION_P (fndecl))
11006 if (DECL_MAIN_P (current_function_decl))
11010 /* Make it so that `main' always returns 0 by default (or
11013 stmt = finish_return_stmt (integer_one_node);
11015 stmt = finish_return_stmt (integer_zero_node);
11017 /* Hack. We don't want the middle-end to warn that this
11018 return is unreachable, so put the statement on the
11020 #ifdef USE_MAPPED_LOCATION
11021 SET_EXPR_LOCATION (stmt, UNKNOWN_LOCATION);
11023 annotate_with_file_line (stmt, input_filename, 0);
11027 if (use_eh_spec_block (current_function_decl))
11028 finish_eh_spec_block (TYPE_RAISES_EXCEPTIONS
11029 (TREE_TYPE (current_function_decl)),
11030 current_eh_spec_block);
11033 /* If we're saving up tree structure, tie off the function now. */
11034 DECL_SAVED_TREE (fndecl) = pop_stmt_list (DECL_SAVED_TREE (fndecl));
11036 finish_fname_decls ();
11038 /* If this function can't throw any exceptions, remember that. */
11039 if (!processing_template_decl
11040 && !cp_function_chain->can_throw
11041 && !flag_non_call_exceptions)
11042 TREE_NOTHROW (fndecl) = 1;
11044 /* This must come after expand_function_end because cleanups might
11045 have declarations (from inline functions) that need to go into
11046 this function's blocks. */
11048 /* If the current binding level isn't the outermost binding level
11049 for this function, either there is a bug, or we have experienced
11050 syntax errors and the statement tree is malformed. */
11051 if (current_binding_level->kind != sk_function_parms)
11053 /* Make sure we have already experienced errors. */
11054 gcc_assert (errorcount);
11056 /* Throw away the broken statement tree and extra binding
11058 DECL_SAVED_TREE (fndecl) = alloc_stmt_list ();
11060 while (current_binding_level->kind != sk_function_parms)
11062 if (current_binding_level->kind == sk_class)
11063 pop_nested_class ();
11065 poplevel (0, 0, 0);
11068 poplevel (1, 0, 1);
11070 /* Statements should always be full-expressions at the outermost set
11071 of curly braces for a function. */
11072 gcc_assert (stmts_are_full_exprs_p ());
11074 /* Set up the named return value optimization, if we can. Candidate
11075 variables are selected in check_return_value. */
11076 if (current_function_return_value)
11078 tree r = current_function_return_value;
11081 if (r != error_mark_node
11082 /* This is only worth doing for fns that return in memory--and
11083 simpler, since we don't have to worry about promoted modes. */
11084 && aggregate_value_p (TREE_TYPE (TREE_TYPE (fndecl)), fndecl)
11085 /* Only allow this for variables declared in the outer scope of
11086 the function so we know that their lifetime always ends with a
11087 return; see g++.dg/opt/nrv6.C. We could be more flexible if
11088 we were to do this optimization in tree-ssa. */
11089 && (outer = outer_curly_brace_block (fndecl))
11090 && chain_member (r, BLOCK_VARS (outer)))
11091 finalize_nrv (&DECL_SAVED_TREE (fndecl), r, DECL_RESULT (fndecl));
11093 current_function_return_value = NULL_TREE;
11096 /* Remember that we were in class scope. */
11097 if (current_class_name)
11098 ctype = current_class_type;
11100 /* Must mark the RESULT_DECL as being in this function. */
11101 DECL_CONTEXT (DECL_RESULT (fndecl)) = fndecl;
11103 /* Set the BLOCK_SUPERCONTEXT of the outermost function scope to point
11104 to the FUNCTION_DECL node itself. */
11105 BLOCK_SUPERCONTEXT (DECL_INITIAL (fndecl)) = fndecl;
11107 /* Save away current state, if appropriate. */
11108 if (!processing_template_decl)
11109 save_function_data (fndecl);
11111 /* Complain if there's just no return statement. */
11112 if (warn_return_type
11113 && TREE_CODE (TREE_TYPE (fntype)) != VOID_TYPE
11114 && !dependent_type_p (TREE_TYPE (fntype))
11115 && !current_function_returns_value && !current_function_returns_null
11116 /* Don't complain if we abort or throw. */
11117 && !current_function_returns_abnormally
11118 && !DECL_NAME (DECL_RESULT (fndecl))
11119 /* Normally, with -Wreturn-type, flow will complain. Unless we're an
11120 inline function, as we might never be compiled separately. */
11121 && (DECL_INLINE (fndecl) || processing_template_decl)
11122 /* Structor return values (if any) are set by the compiler. */
11123 && !DECL_CONSTRUCTOR_P (fndecl)
11124 && !DECL_DESTRUCTOR_P (fndecl))
11125 warning (OPT_Wreturn_type, "no return statement in function returning non-void");
11127 /* Store the end of the function, so that we get good line number
11128 info for the epilogue. */
11129 cfun->function_end_locus = input_location;
11131 /* Genericize before inlining. */
11132 if (!processing_template_decl)
11134 struct language_function *f = DECL_SAVED_FUNCTION_DATA (fndecl);
11135 cp_genericize (fndecl);
11136 /* Clear out the bits we don't need. */
11137 f->x_current_class_ptr = NULL;
11138 f->x_current_class_ref = NULL;
11139 f->x_eh_spec_block = NULL;
11140 f->x_in_charge_parm = NULL;
11141 f->x_vtt_parm = NULL;
11142 f->x_return_value = NULL;
11143 f->bindings = NULL;
11144 f->extern_decl_map = NULL;
11146 /* Handle attribute((warn_unused_result)). Relies on gimple input. */
11147 c_warn_unused_result (&DECL_SAVED_TREE (fndecl));
11149 /* Clear out the bits we don't need. */
11150 local_names = NULL;
11152 /* We're leaving the context of this function, so zap cfun. It's still in
11153 DECL_STRUCT_FUNCTION, and we'll restore it in tree_rest_of_compilation. */
11155 current_function_decl = NULL;
11157 /* If this is an in-class inline definition, we may have to pop the
11158 bindings for the template parameters that we added in
11159 maybe_begin_member_template_processing when start_function was
11161 if (inclass_inline)
11162 maybe_end_member_template_processing ();
11164 /* Leave the scope of the class. */
11166 pop_nested_class ();
11172 /* Let the error reporting routines know that we're outside a
11173 function. For a nested function, this value is used in
11174 cxx_pop_function_context and then reset via pop_function_context. */
11175 current_function_decl = NULL_TREE;
11180 /* Create the FUNCTION_DECL for a function definition.
11181 DECLSPECS and DECLARATOR are the parts of the declaration;
11182 they describe the return type and the name of the function,
11183 but twisted together in a fashion that parallels the syntax of C.
11185 This function creates a binding context for the function body
11186 as well as setting up the FUNCTION_DECL in current_function_decl.
11188 Returns a FUNCTION_DECL on success.
11190 If the DECLARATOR is not suitable for a function (it defines a datum
11191 instead), we return 0, which tells yyparse to report a parse error.
11193 May return void_type_node indicating that this method is actually
11194 a friend. See grokfield for more details.
11196 Came here with a `.pushlevel' .
11198 DO NOT MAKE ANY CHANGES TO THIS CODE WITHOUT MAKING CORRESPONDING
11199 CHANGES TO CODE IN `grokfield'. */
11202 start_method (cp_decl_specifier_seq *declspecs,
11203 const cp_declarator *declarator, tree attrlist)
11205 tree fndecl = grokdeclarator (declarator, declspecs, MEMFUNCDEF, 0,
11208 if (fndecl == error_mark_node)
11209 return error_mark_node;
11211 if (fndecl == NULL || TREE_CODE (fndecl) != FUNCTION_DECL)
11213 error ("invalid member function declaration");
11214 return error_mark_node;
11218 cplus_decl_attributes (&fndecl, attrlist, 0);
11220 /* Pass friends other than inline friend functions back. */
11221 if (fndecl == void_type_node)
11224 if (DECL_IN_AGGR_P (fndecl))
11226 if (DECL_CONTEXT (fndecl)
11227 && TREE_CODE (DECL_CONTEXT (fndecl)) != NAMESPACE_DECL)
11228 error ("%qD is already defined in class %qT", fndecl,
11229 DECL_CONTEXT (fndecl));
11230 return error_mark_node;
11233 check_template_shadow (fndecl);
11235 DECL_DECLARED_INLINE_P (fndecl) = 1;
11236 if (flag_default_inline)
11237 DECL_INLINE (fndecl) = 1;
11239 /* We process method specializations in finish_struct_1. */
11240 if (processing_template_decl && !DECL_TEMPLATE_SPECIALIZATION (fndecl))
11242 fndecl = push_template_decl (fndecl);
11243 if (fndecl == error_mark_node)
11247 if (! DECL_FRIEND_P (fndecl))
11249 if (TREE_CHAIN (fndecl))
11251 fndecl = copy_node (fndecl);
11252 TREE_CHAIN (fndecl) = NULL_TREE;
11256 finish_decl (fndecl, NULL_TREE, NULL_TREE);
11258 /* Make a place for the parms. */
11259 begin_scope (sk_function_parms, fndecl);
11261 DECL_IN_AGGR_P (fndecl) = 1;
11265 /* Go through the motions of finishing a function definition.
11266 We don't compile this method until after the whole class has
11269 FINISH_METHOD must return something that looks as though it
11270 came from GROKFIELD (since we are defining a method, after all).
11272 This is called after parsing the body of the function definition.
11273 STMTS is the chain of statements that makes up the function body.
11275 DECL is the ..._DECL that `start_method' provided. */
11278 finish_method (tree decl)
11280 tree fndecl = decl;
11285 if (decl == void_type_node)
11288 old_initial = DECL_INITIAL (fndecl);
11290 /* Undo the level for the parms (from start_method).
11291 This is like poplevel, but it causes nothing to be
11292 saved. Saving information here confuses symbol-table
11293 output routines. Besides, this information will
11294 be correctly output when this method is actually
11297 /* Clear out the meanings of the local variables of this level;
11298 also record in each decl which block it belongs to. */
11300 for (link = current_binding_level->names; link; link = TREE_CHAIN (link))
11302 if (DECL_NAME (link) != NULL_TREE)
11303 pop_binding (DECL_NAME (link), link);
11304 gcc_assert (TREE_CODE (link) != FUNCTION_DECL);
11305 DECL_CONTEXT (link) = NULL_TREE;
11308 poplevel (0, 0, 0);
11310 DECL_INITIAL (fndecl) = old_initial;
11312 /* We used to check if the context of FNDECL was different from
11313 current_class_type as another way to get inside here. This didn't work
11314 for String.cc in libg++. */
11315 if (DECL_FRIEND_P (fndecl))
11317 VEC_safe_push (tree, gc, CLASSTYPE_INLINE_FRIENDS (current_class_type),
11319 decl = void_type_node;
11326 /* VAR is a VAR_DECL. If its type is incomplete, remember VAR so that
11327 we can lay it out later, when and if its type becomes complete. */
11330 maybe_register_incomplete_var (tree var)
11332 gcc_assert (TREE_CODE (var) == VAR_DECL);
11334 /* Keep track of variables with incomplete types. */
11335 if (!processing_template_decl && TREE_TYPE (var) != error_mark_node
11336 && DECL_EXTERNAL (var))
11338 tree inner_type = TREE_TYPE (var);
11340 while (TREE_CODE (inner_type) == ARRAY_TYPE)
11341 inner_type = TREE_TYPE (inner_type);
11342 inner_type = TYPE_MAIN_VARIANT (inner_type);
11344 if ((!COMPLETE_TYPE_P (inner_type) && CLASS_TYPE_P (inner_type))
11345 /* RTTI TD entries are created while defining the type_info. */
11346 || (TYPE_LANG_SPECIFIC (inner_type)
11347 && TYPE_BEING_DEFINED (inner_type)))
11348 incomplete_vars = tree_cons (inner_type, var, incomplete_vars);
11352 /* Called when a class type (given by TYPE) is defined. If there are
11353 any existing VAR_DECLs whose type hsa been completed by this
11354 declaration, update them now. */
11357 complete_vars (tree type)
11359 tree *list = &incomplete_vars;
11361 gcc_assert (CLASS_TYPE_P (type));
11364 if (same_type_p (type, TREE_PURPOSE (*list)))
11366 tree var = TREE_VALUE (*list);
11367 tree type = TREE_TYPE (var);
11368 /* Complete the type of the variable. The VAR_DECL itself
11369 will be laid out in expand_expr. */
11370 complete_type (type);
11371 cp_apply_type_quals_to_decl (cp_type_quals (type), var);
11372 /* Remove this entry from the list. */
11373 *list = TREE_CHAIN (*list);
11376 list = &TREE_CHAIN (*list);
11379 /* Check for pending declarations which may have abstract type. */
11380 complete_type_check_abstract (type);
11383 /* If DECL is of a type which needs a cleanup, build that cleanup
11387 cxx_maybe_build_cleanup (tree decl)
11389 tree type = TREE_TYPE (decl);
11391 if (type != error_mark_node && TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type))
11393 int flags = LOOKUP_NORMAL|LOOKUP_DESTRUCTOR;
11395 bool has_vbases = (TREE_CODE (type) == RECORD_TYPE
11396 && CLASSTYPE_VBASECLASSES (type));
11398 if (TREE_CODE (type) == ARRAY_TYPE)
11402 cxx_mark_addressable (decl);
11403 rval = build_unary_op (ADDR_EXPR, decl, 0);
11406 /* Optimize for space over speed here. */
11407 if (!has_vbases || flag_expensive_optimizations)
11408 flags |= LOOKUP_NONVIRTUAL;
11410 rval = build_delete (TREE_TYPE (rval), rval,
11411 sfk_complete_destructor, flags, 0);
11418 /* When a stmt has been parsed, this function is called. */
11425 /* DECL was originally constructed as a non-static member function,
11426 but turned out to be static. Update it accordingly. */
11429 revert_static_member_fn (tree decl)
11432 tree function = TREE_TYPE (decl);
11433 tree args = TYPE_ARG_TYPES (function);
11435 if (cp_type_quals (TREE_TYPE (TREE_VALUE (args)))
11436 != TYPE_UNQUALIFIED)
11437 error ("static member function %q#D declared with type qualifiers", decl);
11439 args = TREE_CHAIN (args);
11440 tmp = build_function_type (TREE_TYPE (function), args);
11441 tmp = build_qualified_type (tmp, cp_type_quals (function));
11442 tmp = build_exception_variant (tmp,
11443 TYPE_RAISES_EXCEPTIONS (function));
11444 TREE_TYPE (decl) = tmp;
11445 if (DECL_ARGUMENTS (decl))
11446 DECL_ARGUMENTS (decl) = TREE_CHAIN (DECL_ARGUMENTS (decl));
11447 DECL_STATIC_FUNCTION_P (decl) = 1;
11450 /* Initialize the variables used during compilation of a C++
11454 cxx_push_function_context (struct function * f)
11456 struct language_function *p = GGC_CNEW (struct language_function);
11459 /* Whenever we start a new function, we destroy temporaries in the
11461 current_stmt_tree ()->stmts_are_full_exprs_p = 1;
11467 if (DECL_SAVED_FUNCTION_DATA (fn))
11469 /* If we already parsed this function, and we're just expanding it
11470 now, restore saved state. */
11471 *cp_function_chain = *DECL_SAVED_FUNCTION_DATA (fn);
11473 /* We don't need the saved data anymore. Unless this is an inline
11474 function; we need the named return value info for
11475 declare_return_variable. */
11476 if (! DECL_INLINE (fn))
11477 DECL_SAVED_FUNCTION_DATA (fn) = NULL;
11482 /* Free the language-specific parts of F, now that we've finished
11483 compiling the function. */
11486 cxx_pop_function_context (struct function * f)
11491 /* Return which tree structure is used by T, or TS_CP_GENERIC if T is
11492 one of the language-independent trees. */
11494 enum cp_tree_node_structure_enum
11495 cp_tree_node_structure (union lang_tree_node * t)
11497 switch (TREE_CODE (&t->generic))
11499 case DEFAULT_ARG: return TS_CP_DEFAULT_ARG;
11500 case IDENTIFIER_NODE: return TS_CP_IDENTIFIER;
11501 case OVERLOAD: return TS_CP_OVERLOAD;
11502 case TEMPLATE_PARM_INDEX: return TS_CP_TPI;
11503 case TINST_LEVEL: return TS_CP_TINST_LEVEL;
11504 case PTRMEM_CST: return TS_CP_PTRMEM;
11505 case BASELINK: return TS_CP_BASELINK;
11506 default: return TS_CP_GENERIC;
11510 /* Build the void_list_node (void_type_node having been created). */
11512 build_void_list_node (void)
11514 tree t = build_tree_list (NULL_TREE, void_type_node);
11519 cp_missing_noreturn_ok_p (tree decl)
11521 /* A missing noreturn is ok for the `main' function. */
11522 return DECL_MAIN_P (decl);
11525 /* Return the COMDAT group into which DECL should be placed. */
11528 cxx_comdat_group (tree decl)
11532 /* Virtual tables, construction virtual tables, and virtual table
11533 tables all go in a single COMDAT group, named after the primary
11535 if (TREE_CODE (decl) == VAR_DECL && DECL_VTABLE_OR_VTT_P (decl))
11536 name = DECL_ASSEMBLER_NAME (CLASSTYPE_VTABLES (DECL_CONTEXT (decl)));
11537 /* For all other DECLs, the COMDAT group is the mangled name of the
11538 declaration itself. */
11541 while (DECL_THUNK_P (decl))
11543 /* If TARGET_USE_LOCAL_THUNK_ALIAS_P, use_thunk puts the thunk
11544 into the same section as the target function. In that case
11545 we must return target's name. */
11546 tree target = THUNK_TARGET (decl);
11547 if (TARGET_USE_LOCAL_THUNK_ALIAS_P (target)
11548 && DECL_SECTION_NAME (target) != NULL
11549 && DECL_ONE_ONLY (target))
11554 name = DECL_ASSEMBLER_NAME (decl);
11557 return IDENTIFIER_POINTER (name);
11560 #include "gt-cp-decl.h"