1 /* Process declarations and variables for C++ compiler.
2 Copyright (C) 1988, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000,
3 2001, 2002, 2003, 2004, 2005, 2006 Free Software Foundation, Inc.
4 Contributed by Michael Tiemann (tiemann@cygnus.com)
6 This file is part of GCC.
8 GCC is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2, or (at your option)
13 GCC is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with GCC; see the file COPYING. If not, write to
20 the Free Software Foundation, 51 Franklin Street, Fifth Floor,
21 Boston, MA 02110-1301, USA. */
24 /* Process declarations and symbol lookup for C++ front end.
25 Also constructs types; the standard scalar types at initialization,
26 and structure, union, array and enum types when they are declared. */
28 /* ??? not all decl nodes are given the most useful possible
29 line numbers. For example, the CONST_DECLs for enum values. */
33 #include "coretypes.h"
40 #include "tree-inline.h"
50 #include "diagnostic.h"
53 #include "tree-flow.h"
55 static tree grokparms (cp_parameter_declarator *, tree *);
56 static const char *redeclaration_error_message (tree, tree);
58 static int decl_jump_unsafe (tree);
59 static void require_complete_types_for_parms (tree);
60 static int ambi_op_p (enum tree_code);
61 static int unary_op_p (enum tree_code);
62 static void push_local_name (tree);
63 static tree grok_reference_init (tree, tree, tree, tree *);
64 static tree grokvardecl (tree, tree, const cp_decl_specifier_seq *,
66 static void record_unknown_type (tree, const char *);
67 static tree builtin_function_1 (const char *, tree, tree,
68 enum built_in_function code,
69 enum built_in_class cl, const char *,
71 static tree build_library_fn_1 (tree, enum tree_code, tree);
72 static int member_function_or_else (tree, tree, enum overload_flags);
73 static void bad_specifiers (tree, const char *, int, int, int, int,
75 static void check_for_uninitialized_const_var (tree);
76 static hashval_t typename_hash (const void *);
77 static int typename_compare (const void *, const void *);
78 static tree local_variable_p_walkfn (tree *, int *, void *);
79 static tree record_builtin_java_type (const char *, int);
80 static const char *tag_name (enum tag_types);
81 static tree lookup_and_check_tag (enum tag_types, tree, tag_scope, bool);
82 static int walk_namespaces_r (tree, walk_namespaces_fn, void *);
83 static void maybe_deduce_size_from_array_init (tree, tree);
84 static void layout_var_decl (tree);
85 static void maybe_commonize_var (tree);
86 static tree check_initializer (tree, tree, int, tree *);
87 static void make_rtl_for_nonlocal_decl (tree, tree, const char *);
88 static void save_function_data (tree);
89 static void check_function_type (tree, tree);
90 static void finish_constructor_body (void);
91 static void begin_destructor_body (void);
92 static void finish_destructor_body (void);
93 static tree create_array_type_for_decl (tree, tree, tree);
94 static tree get_atexit_node (void);
95 static tree get_dso_handle_node (void);
96 static tree start_cleanup_fn (void);
97 static void end_cleanup_fn (void);
98 static tree cp_make_fname_decl (tree, int);
99 static void initialize_predefined_identifiers (void);
100 static tree check_special_function_return_type
101 (special_function_kind, tree, tree);
102 static tree push_cp_library_fn (enum tree_code, tree);
103 static tree build_cp_library_fn (tree, enum tree_code, tree);
104 static void store_parm_decls (tree);
105 static void initialize_local_var (tree, tree);
106 static void expand_static_init (tree, tree);
107 static tree next_initializable_field (tree);
109 /* The following symbols are subsumed in the cp_global_trees array, and
110 listed here individually for documentation purposes.
113 tree wchar_decl_node;
115 tree vtable_entry_type;
116 tree delta_type_node;
117 tree __t_desc_type_node;
119 tree class_type_node;
120 tree unknown_type_node;
122 Array type `vtable_entry_type[]'
125 tree vtbl_ptr_type_node;
132 A FUNCTION_DECL which can call `abort'. Not necessarily the
133 one that the user will declare, but sufficient to be called
134 by routines that want to abort the program.
138 The FUNCTION_DECL for the default `::operator delete'.
140 tree global_delete_fndecl;
143 tree type_info_type_node, tinfo_decl_id, tinfo_decl_type;
144 tree tinfo_var_id; */
146 tree cp_global_trees[CPTI_MAX];
148 /* Indicates that there is a type value in some namespace, although
149 that is not necessarily in scope at the moment. */
151 tree global_type_node;
153 /* The node that holds the "name" of the global scope. */
154 tree global_scope_name;
156 #define local_names cp_function_chain->x_local_names
158 /* A list of objects which have constructors or destructors
159 which reside in the global scope. The decl is stored in
160 the TREE_VALUE slot and the initializer is stored
161 in the TREE_PURPOSE slot. */
162 tree static_aggregates;
166 /* A node for the integer constants 2, and 3. */
168 tree integer_two_node, integer_three_node;
170 /* Used only for jumps to as-yet undefined labels, since jumps to
171 defined labels can have their validity checked immediately. */
173 struct named_label_use_entry GTY(())
175 struct named_label_use_entry *next;
176 /* The binding level to which this entry is *currently* attached.
177 This is initially the binding level in which the goto appeared,
178 but is modified as scopes are closed. */
179 struct cp_binding_level *binding_level;
180 /* The head of the names list that was current when the goto appeared,
181 or the inner scope popped. These are the decls that will *not* be
182 skipped when jumping to the label. */
184 /* The location of the goto, for error reporting. */
185 location_t o_goto_locus;
186 /* True if an OpenMP structured block scope has been closed since
187 the goto appeared. This means that the branch from the label will
188 illegally exit an OpenMP scope. */
192 /* A list of all LABEL_DECLs in the function that have names. Here so
193 we can clear out their names' definitions at the end of the
194 function, and so we can check the validity of jumps to these labels. */
196 struct named_label_entry GTY(())
198 /* The decl itself. */
201 /* The binding level to which the label is *currently* attached.
202 This is initially set to the binding level in which the label
203 is defined, but is modified as scopes are closed. */
204 struct cp_binding_level *binding_level;
205 /* The head of the names list that was current when the label was
206 defined, or the inner scope popped. These are the decls that will
207 be skipped when jumping to the label. */
209 /* A tree list of all decls from all binding levels that would be
210 crossed by a backward branch to the label. */
213 /* A list of uses of the label, before the label is defined. */
214 struct named_label_use_entry *uses;
216 /* The following bits are set after the label is defined, and are
217 updated as scopes are popped. They indicate that a backward jump
218 to the label will illegally enter a scope of the given flavor. */
224 #define named_labels cp_function_chain->x_named_labels
226 /* The number of function bodies which we are currently processing.
227 (Zero if we are at namespace scope, one inside the body of a
228 function, two inside the body of a function in a local class, etc.) */
231 /* States indicating how grokdeclarator() should handle declspecs marked
232 with __attribute__((deprecated)). An object declared as
233 __attribute__((deprecated)) suppresses warnings of uses of other
236 enum deprecated_states {
241 static enum deprecated_states deprecated_state = DEPRECATED_NORMAL;
244 /* A TREE_LIST of VAR_DECLs. The TREE_PURPOSE is a RECORD_TYPE or
245 UNION_TYPE; the TREE_VALUE is a VAR_DECL with that type. At the
246 time the VAR_DECL was declared, the type was incomplete. */
248 static GTY(()) tree incomplete_vars;
250 /* Returns the kind of template specialization we are currently
251 processing, given that it's declaration contained N_CLASS_SCOPES
252 explicit scope qualifications. */
255 current_tmpl_spec_kind (int n_class_scopes)
257 int n_template_parm_scopes = 0;
258 int seen_specialization_p = 0;
259 int innermost_specialization_p = 0;
260 struct cp_binding_level *b;
262 /* Scan through the template parameter scopes. */
263 for (b = current_binding_level;
264 b->kind == sk_template_parms;
267 /* If we see a specialization scope inside a parameter scope,
268 then something is wrong. That corresponds to a declaration
271 template <class T> template <> ...
273 which is always invalid since [temp.expl.spec] forbids the
274 specialization of a class member template if the enclosing
275 class templates are not explicitly specialized as well. */
276 if (b->explicit_spec_p)
278 if (n_template_parm_scopes == 0)
279 innermost_specialization_p = 1;
281 seen_specialization_p = 1;
283 else if (seen_specialization_p == 1)
284 return tsk_invalid_member_spec;
286 ++n_template_parm_scopes;
289 /* Handle explicit instantiations. */
290 if (processing_explicit_instantiation)
292 if (n_template_parm_scopes != 0)
293 /* We've seen a template parameter list during an explicit
294 instantiation. For example:
296 template <class T> template void f(int);
298 This is erroneous. */
299 return tsk_invalid_expl_inst;
301 return tsk_expl_inst;
304 if (n_template_parm_scopes < n_class_scopes)
305 /* We've not seen enough template headers to match all the
306 specialized classes present. For example:
308 template <class T> void R<T>::S<T>::f(int);
310 This is invalid; there needs to be one set of template
311 parameters for each class. */
312 return tsk_insufficient_parms;
313 else if (n_template_parm_scopes == n_class_scopes)
314 /* We're processing a non-template declaration (even though it may
315 be a member of a template class.) For example:
317 template <class T> void S<T>::f(int);
319 The `class T' maches the `S<T>', leaving no template headers
320 corresponding to the `f'. */
322 else if (n_template_parm_scopes > n_class_scopes + 1)
323 /* We've got too many template headers. For example:
325 template <> template <class T> void f (T);
327 There need to be more enclosing classes. */
328 return tsk_excessive_parms;
330 /* This must be a template. It's of the form:
332 template <class T> template <class U> void S<T>::f(U);
334 This is a specialization if the innermost level was a
335 specialization; otherwise it's just a definition of the
337 return innermost_specialization_p ? tsk_expl_spec : tsk_template;
340 /* Exit the current scope. */
348 /* When a label goes out of scope, check to see if that label was used
349 in a valid manner, and issue any appropriate warnings or errors. */
352 pop_label (tree label, tree old_value)
354 if (!processing_template_decl)
356 if (DECL_INITIAL (label) == NULL_TREE)
360 error ("label %q+D used but not defined", label);
361 #ifdef USE_MAPPED_LOCATION
362 location = input_location; /* FIXME want (input_filename, (line)0) */
364 location.file = input_filename;
367 /* Avoid crashing later. */
368 define_label (location, DECL_NAME (label));
370 else if (!TREE_USED (label))
371 warning (OPT_Wunused_label, "label %q+D defined but not used", label);
374 SET_IDENTIFIER_LABEL_VALUE (DECL_NAME (label), old_value);
377 /* At the end of a function, all labels declared within the function
378 go out of scope. BLOCK is the top-level block for the
382 pop_labels_1 (void **slot, void *data)
384 struct named_label_entry *ent = (struct named_label_entry *) *slot;
385 tree block = (tree) data;
387 pop_label (ent->label_decl, NULL_TREE);
389 /* Put the labels into the "variables" of the top-level block,
390 so debugger can see them. */
391 TREE_CHAIN (ent->label_decl) = BLOCK_VARS (block);
392 BLOCK_VARS (block) = ent->label_decl;
394 htab_clear_slot (named_labels, slot);
400 pop_labels (tree block)
404 htab_traverse (named_labels, pop_labels_1, block);
409 /* At the end of a block with local labels, restore the outer definition. */
412 pop_local_label (tree label, tree old_value)
414 struct named_label_entry dummy;
417 pop_label (label, old_value);
419 dummy.label_decl = label;
420 slot = htab_find_slot (named_labels, &dummy, NO_INSERT);
421 htab_clear_slot (named_labels, slot);
424 /* The following two routines are used to interface to Objective-C++.
425 The binding level is purposely treated as an opaque type. */
428 objc_get_current_scope (void)
430 return current_binding_level;
433 /* The following routine is used by the NeXT-style SJLJ exceptions;
434 variables get marked 'volatile' so as to not be clobbered by
435 _setjmp()/_longjmp() calls. All variables in the current scope,
436 as well as parent scopes up to (but not including) ENCLOSING_BLK
437 shall be thusly marked. */
440 objc_mark_locals_volatile (void *enclosing_blk)
442 struct cp_binding_level *scope;
444 for (scope = current_binding_level;
445 scope && scope != enclosing_blk;
446 scope = scope->level_chain)
450 for (decl = scope->names; decl; decl = TREE_CHAIN (decl))
451 objc_volatilize_decl (decl);
453 /* Do not climb up past the current function. */
454 if (scope->kind == sk_function_parms)
459 /* Update data for defined and undefined labels when leaving a scope. */
462 poplevel_named_label_1 (void **slot, void *data)
464 struct named_label_entry *ent = (struct named_label_entry *) *slot;
465 struct cp_binding_level *bl = (struct cp_binding_level *) data;
466 struct cp_binding_level *obl = bl->level_chain;
468 if (ent->binding_level == bl)
472 for (decl = ent->names_in_scope; decl; decl = TREE_CHAIN (decl))
473 if (decl_jump_unsafe (decl))
474 ent->bad_decls = tree_cons (NULL, decl, ent->bad_decls);
476 ent->binding_level = obl;
477 ent->names_in_scope = obl->names;
481 ent->in_try_scope = true;
484 ent->in_catch_scope = true;
487 ent->in_omp_scope = true;
495 struct named_label_use_entry *use;
497 for (use = ent->uses; use ; use = use->next)
498 if (use->binding_level == bl)
500 use->binding_level = obl;
501 use->names_in_scope = obl->names;
502 if (bl->kind == sk_omp)
503 use->in_omp_scope = true;
510 /* Exit a binding level.
511 Pop the level off, and restore the state of the identifier-decl mappings
512 that were in effect when this level was entered.
514 If KEEP == 1, this level had explicit declarations, so
515 and create a "block" (a BLOCK node) for the level
516 to record its declarations and subblocks for symbol table output.
518 If FUNCTIONBODY is nonzero, this level is the body of a function,
519 so create a block as if KEEP were set and also clear out all
522 If REVERSE is nonzero, reverse the order of decls before putting
523 them into the BLOCK. */
526 poplevel (int keep, int reverse, int functionbody)
529 /* The chain of decls was accumulated in reverse order.
530 Put it into forward order, just for cleanliness. */
532 int tmp = functionbody;
533 int real_functionbody;
537 int leaving_for_scope;
540 timevar_push (TV_NAME_LOOKUP);
545 gcc_assert (current_binding_level->kind != sk_class);
547 real_functionbody = (current_binding_level->kind == sk_cleanup
548 ? ((functionbody = 0), tmp) : functionbody);
549 subblocks = functionbody >= 0 ? current_binding_level->blocks : 0;
551 gcc_assert (!VEC_length(cp_class_binding,
552 current_binding_level->class_shadowed));
554 /* We used to use KEEP == 2 to indicate that the new block should go
555 at the beginning of the list of blocks at this binding level,
556 rather than the end. This hack is no longer used. */
557 gcc_assert (keep == 0 || keep == 1);
559 if (current_binding_level->keep)
562 /* Any uses of undefined labels, and any defined labels, now operate
563 under constraints of next binding contour. */
564 if (cfun && !functionbody && named_labels)
565 htab_traverse (named_labels, poplevel_named_label_1,
566 current_binding_level);
568 /* Get the decls in the order they were written.
569 Usually current_binding_level->names is in reverse order.
570 But parameter decls were previously put in forward order. */
573 current_binding_level->names
574 = decls = nreverse (current_binding_level->names);
576 decls = current_binding_level->names;
578 /* If there were any declarations or structure tags in that level,
579 or if this level is a function body,
580 create a BLOCK to record them for the life of this function. */
582 if (keep == 1 || functionbody)
583 block = make_node (BLOCK);
584 if (block != NULL_TREE)
586 BLOCK_VARS (block) = decls;
587 BLOCK_SUBBLOCKS (block) = subblocks;
590 /* In each subblock, record that this is its superior. */
592 for (link = subblocks; link; link = TREE_CHAIN (link))
593 BLOCK_SUPERCONTEXT (link) = block;
595 /* We still support the old for-scope rules, whereby the variables
596 in a for-init statement were in scope after the for-statement
597 ended. We only use the new rules if flag_new_for_scope is
600 = current_binding_level->kind == sk_for && flag_new_for_scope == 1;
602 /* Before we remove the declarations first check for unused variables. */
603 if (warn_unused_variable
604 && !processing_template_decl)
605 for (decl = getdecls (); decl; decl = TREE_CHAIN (decl))
606 if (TREE_CODE (decl) == VAR_DECL
607 && ! TREE_USED (decl)
608 && ! DECL_IN_SYSTEM_HEADER (decl)
609 && DECL_NAME (decl) && ! DECL_ARTIFICIAL (decl))
610 warning (OPT_Wunused_variable, "unused variable %q+D", decl);
612 /* Remove declarations for all the DECLs in this level. */
613 for (link = decls; link; link = TREE_CHAIN (link))
615 if (leaving_for_scope && TREE_CODE (link) == VAR_DECL
618 tree name = DECL_NAME (link);
622 ob = outer_binding (name,
623 IDENTIFIER_BINDING (name),
626 ns_binding = IDENTIFIER_NAMESPACE_VALUE (name);
628 ns_binding = NULL_TREE;
630 if (ob && ob->scope == current_binding_level->level_chain)
631 /* We have something like:
636 and we are leaving the `for' scope. There's no reason to
637 keep the binding of the inner `i' in this case. */
638 pop_binding (name, link);
639 else if ((ob && (TREE_CODE (ob->value) == TYPE_DECL))
640 || (ns_binding && TREE_CODE (ns_binding) == TYPE_DECL))
641 /* Here, we have something like:
649 We must pop the for-scope binding so we know what's a
650 type and what isn't. */
651 pop_binding (name, link);
654 /* Mark this VAR_DECL as dead so that we can tell we left it
655 there only for backward compatibility. */
656 DECL_DEAD_FOR_LOCAL (link) = 1;
658 /* Keep track of what should have happened when we
659 popped the binding. */
662 SET_DECL_SHADOWED_FOR_VAR (link, ob->value);
663 DECL_HAS_SHADOWED_FOR_VAR_P (link) = 1;
666 /* Add it to the list of dead variables in the next
667 outermost binding to that we can remove these when we
668 leave that binding. */
669 current_binding_level->level_chain->dead_vars_from_for
670 = tree_cons (NULL_TREE, link,
671 current_binding_level->level_chain->
674 /* Although we don't pop the cxx_binding, we do clear
675 its SCOPE since the scope is going away now. */
676 IDENTIFIER_BINDING (name)->scope
677 = current_binding_level->level_chain;
684 /* Remove the binding. */
687 if (TREE_CODE (decl) == TREE_LIST)
688 decl = TREE_VALUE (decl);
691 if (TREE_CODE (name) == OVERLOAD)
692 name = OVL_FUNCTION (name);
694 gcc_assert (DECL_P (name));
695 pop_binding (DECL_NAME (name), decl);
699 /* Remove declarations for any `for' variables from inner scopes
700 that we kept around. */
701 for (link = current_binding_level->dead_vars_from_for;
702 link; link = TREE_CHAIN (link))
703 pop_binding (DECL_NAME (TREE_VALUE (link)), TREE_VALUE (link));
705 /* Restore the IDENTIFIER_TYPE_VALUEs. */
706 for (link = current_binding_level->type_shadowed;
707 link; link = TREE_CHAIN (link))
708 SET_IDENTIFIER_TYPE_VALUE (TREE_PURPOSE (link), TREE_VALUE (link));
710 /* Restore the IDENTIFIER_LABEL_VALUEs for local labels. */
711 for (link = current_binding_level->shadowed_labels;
713 link = TREE_CHAIN (link))
714 pop_local_label (TREE_VALUE (link), TREE_PURPOSE (link));
716 /* There may be OVERLOADs (wrapped in TREE_LISTs) on the BLOCK_VARs
717 list if a `using' declaration put them there. The debugging
718 back-ends won't understand OVERLOAD, so we remove them here.
719 Because the BLOCK_VARS are (temporarily) shared with
720 CURRENT_BINDING_LEVEL->NAMES we must do this fixup after we have
721 popped all the bindings. */
726 for (d = &BLOCK_VARS (block); *d; )
728 if (TREE_CODE (*d) == TREE_LIST)
729 *d = TREE_CHAIN (*d);
731 d = &TREE_CHAIN (*d);
735 /* If the level being exited is the top level of a function,
736 check over all the labels. */
739 /* Since this is the top level block of a function, the vars are
740 the function's parameters. Don't leave them in the BLOCK
741 because they are found in the FUNCTION_DECL instead. */
742 BLOCK_VARS (block) = 0;
746 kind = current_binding_level->kind;
747 if (kind == sk_cleanup)
751 /* If this is a temporary binding created for a cleanup, then we'll
752 have pushed a statement list level. Pop that, create a new
753 BIND_EXPR for the block, and insert it into the stream. */
754 stmt = pop_stmt_list (current_binding_level->statement_list);
755 stmt = c_build_bind_expr (block, stmt);
761 DECL_INITIAL (current_function_decl) = block;
763 current_binding_level->blocks
764 = chainon (current_binding_level->blocks, block);
766 /* If we did not make a block for the level just exited,
767 any blocks made for inner levels
768 (since they cannot be recorded as subblocks in that level)
769 must be carried forward so they will later become subblocks
770 of something else. */
772 current_binding_level->blocks
773 = chainon (current_binding_level->blocks, subblocks);
775 /* Each and every BLOCK node created here in `poplevel' is important
776 (e.g. for proper debugging information) so if we created one
777 earlier, mark it as "used". */
779 TREE_USED (block) = 1;
781 /* All temporary bindings created for cleanups are popped silently. */
782 if (kind == sk_cleanup)
785 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, block);
788 /* Insert BLOCK at the end of the list of subblocks of the
789 current binding level. This is used when a BIND_EXPR is expanded,
790 to handle the BLOCK node inside the BIND_EXPR. */
793 insert_block (tree block)
795 TREE_USED (block) = 1;
796 current_binding_level->blocks
797 = chainon (current_binding_level->blocks, block);
800 /* Walk all the namespaces contained NAMESPACE, including NAMESPACE
801 itself, calling F for each. The DATA is passed to F as well. */
804 walk_namespaces_r (tree namespace, walk_namespaces_fn f, void* data)
807 tree current = NAMESPACE_LEVEL (namespace)->namespaces;
809 result |= (*f) (namespace, data);
811 for (; current; current = TREE_CHAIN (current))
812 result |= walk_namespaces_r (current, f, data);
817 /* Walk all the namespaces, calling F for each. The DATA is passed to
821 walk_namespaces (walk_namespaces_fn f, void* data)
823 return walk_namespaces_r (global_namespace, f, data);
826 /* Call wrapup_globals_declarations for the globals in NAMESPACE. If
827 DATA is non-NULL, this is the last time we will call
828 wrapup_global_declarations for this NAMESPACE. */
831 wrapup_globals_for_namespace (tree namespace, void* data)
833 struct cp_binding_level *level = NAMESPACE_LEVEL (namespace);
834 VEC(tree,gc) *statics = level->static_decls;
835 tree *vec = VEC_address (tree, statics);
836 int len = VEC_length (tree, statics);
837 int last_time = (data != 0);
841 check_global_declarations (vec, len);
842 emit_debug_global_declarations (vec, len);
846 /* Write out any globals that need to be output. */
847 return wrapup_global_declarations (vec, len);
851 /* In C++, you don't have to write `struct S' to refer to `S'; you
852 can just use `S'. We accomplish this by creating a TYPE_DECL as
853 if the user had written `typedef struct S S'. Create and return
854 the TYPE_DECL for TYPE. */
857 create_implicit_typedef (tree name, tree type)
861 decl = build_decl (TYPE_DECL, name, type);
862 DECL_ARTIFICIAL (decl) = 1;
863 /* There are other implicit type declarations, like the one *within*
864 a class that allows you to write `S::S'. We must distinguish
866 SET_DECL_IMPLICIT_TYPEDEF_P (decl);
867 TYPE_NAME (type) = decl;
872 /* Remember a local name for name-mangling purposes. */
875 push_local_name (tree decl)
880 timevar_push (TV_NAME_LOOKUP);
882 name = DECL_NAME (decl);
884 nelts = VEC_length (tree, local_names);
885 for (i = 0; i < nelts; i++)
887 t = VEC_index (tree, local_names, i);
888 if (DECL_NAME (t) == name)
890 if (!DECL_LANG_SPECIFIC (decl))
891 retrofit_lang_decl (decl);
892 DECL_LANG_SPECIFIC (decl)->decl_flags.u2sel = 1;
893 if (DECL_LANG_SPECIFIC (t))
894 DECL_DISCRIMINATOR (decl) = DECL_DISCRIMINATOR (t) + 1;
896 DECL_DISCRIMINATOR (decl) = 1;
898 VEC_replace (tree, local_names, i, decl);
899 timevar_pop (TV_NAME_LOOKUP);
904 VEC_safe_push (tree, gc, local_names, decl);
905 timevar_pop (TV_NAME_LOOKUP);
908 /* Subroutine of duplicate_decls: return truthvalue of whether
909 or not types of these decls match.
911 For C++, we must compare the parameter list so that `int' can match
912 `int&' in a parameter position, but `int&' is not confused with
916 decls_match (tree newdecl, tree olddecl)
920 if (newdecl == olddecl)
923 if (TREE_CODE (newdecl) != TREE_CODE (olddecl))
924 /* If the two DECLs are not even the same kind of thing, we're not
925 interested in their types. */
928 if (TREE_CODE (newdecl) == FUNCTION_DECL)
930 tree f1 = TREE_TYPE (newdecl);
931 tree f2 = TREE_TYPE (olddecl);
932 tree p1 = TYPE_ARG_TYPES (f1);
933 tree p2 = TYPE_ARG_TYPES (f2);
935 if (CP_DECL_CONTEXT (newdecl) != CP_DECL_CONTEXT (olddecl)
936 && ! (DECL_EXTERN_C_P (newdecl)
937 && DECL_EXTERN_C_P (olddecl)))
940 if (TREE_CODE (f1) != TREE_CODE (f2))
943 if (same_type_p (TREE_TYPE (f1), TREE_TYPE (f2)))
945 if (p2 == NULL_TREE && DECL_EXTERN_C_P (olddecl)
946 && (DECL_BUILT_IN (olddecl)
947 #ifndef NO_IMPLICIT_EXTERN_C
948 || (DECL_IN_SYSTEM_HEADER (newdecl) && !DECL_CLASS_SCOPE_P (newdecl))
949 || (DECL_IN_SYSTEM_HEADER (olddecl) && !DECL_CLASS_SCOPE_P (olddecl))
953 types_match = self_promoting_args_p (p1);
954 if (p1 == void_list_node)
955 TREE_TYPE (newdecl) = TREE_TYPE (olddecl);
957 #ifndef NO_IMPLICIT_EXTERN_C
958 else if (p1 == NULL_TREE
959 && (DECL_EXTERN_C_P (olddecl)
960 && DECL_IN_SYSTEM_HEADER (olddecl)
961 && !DECL_CLASS_SCOPE_P (olddecl))
962 && (DECL_EXTERN_C_P (newdecl)
963 && DECL_IN_SYSTEM_HEADER (newdecl)
964 && !DECL_CLASS_SCOPE_P (newdecl)))
966 types_match = self_promoting_args_p (p2);
967 TREE_TYPE (newdecl) = TREE_TYPE (olddecl);
971 types_match = compparms (p1, p2);
976 else if (TREE_CODE (newdecl) == TEMPLATE_DECL)
978 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl))
979 != TREE_CODE (DECL_TEMPLATE_RESULT (olddecl)))
982 if (!comp_template_parms (DECL_TEMPLATE_PARMS (newdecl),
983 DECL_TEMPLATE_PARMS (olddecl)))
986 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == TYPE_DECL)
987 types_match = same_type_p (TREE_TYPE (DECL_TEMPLATE_RESULT (olddecl)),
988 TREE_TYPE (DECL_TEMPLATE_RESULT (newdecl)));
990 types_match = decls_match (DECL_TEMPLATE_RESULT (olddecl),
991 DECL_TEMPLATE_RESULT (newdecl));
995 /* Need to check scope for variable declaration (VAR_DECL).
996 For typedef (TYPE_DECL), scope is ignored. */
997 if (TREE_CODE (newdecl) == VAR_DECL
998 && CP_DECL_CONTEXT (newdecl) != CP_DECL_CONTEXT (olddecl)
1000 Two declarations for an object with C language linkage
1001 with the same name (ignoring the namespace that qualify
1002 it) that appear in different namespace scopes refer to
1004 && !(DECL_EXTERN_C_P (olddecl) && DECL_EXTERN_C_P (newdecl)))
1007 if (TREE_TYPE (newdecl) == error_mark_node)
1008 types_match = TREE_TYPE (olddecl) == error_mark_node;
1009 else if (TREE_TYPE (olddecl) == NULL_TREE)
1010 types_match = TREE_TYPE (newdecl) == NULL_TREE;
1011 else if (TREE_TYPE (newdecl) == NULL_TREE)
1014 types_match = comptypes (TREE_TYPE (newdecl),
1015 TREE_TYPE (olddecl),
1016 COMPARE_REDECLARATION);
1022 /* If NEWDECL is `static' and an `extern' was seen previously,
1023 warn about it. OLDDECL is the previous declaration.
1025 Note that this does not apply to the C++ case of declaring
1026 a variable `extern const' and then later `const'.
1028 Don't complain about built-in functions, since they are beyond
1029 the user's control. */
1032 warn_extern_redeclared_static (tree newdecl, tree olddecl)
1036 if (TREE_CODE (newdecl) == TYPE_DECL
1037 || TREE_CODE (newdecl) == TEMPLATE_DECL
1038 || TREE_CODE (newdecl) == CONST_DECL
1039 || TREE_CODE (newdecl) == NAMESPACE_DECL)
1042 /* Don't get confused by static member functions; that's a different
1044 if (TREE_CODE (newdecl) == FUNCTION_DECL
1045 && DECL_STATIC_FUNCTION_P (newdecl))
1048 /* If the old declaration was `static', or the new one isn't, then
1049 then everything is OK. */
1050 if (DECL_THIS_STATIC (olddecl) || !DECL_THIS_STATIC (newdecl))
1053 /* It's OK to declare a builtin function as `static'. */
1054 if (TREE_CODE (olddecl) == FUNCTION_DECL
1055 && DECL_ARTIFICIAL (olddecl))
1058 name = DECL_ASSEMBLER_NAME (newdecl);
1059 pedwarn ("%qD was declared %<extern%> and later %<static%>", newdecl);
1060 pedwarn ("previous declaration of %q+D", olddecl);
1063 /* NEW_DECL is a redeclaration of OLD_DECL; both are functions or
1064 function templates. If their exception specifications do not
1065 match, issue an a diagnostic. */
1068 check_redeclaration_exception_specification (tree new_decl,
1073 tree new_exceptions;
1074 tree old_exceptions;
1076 new_type = TREE_TYPE (new_decl);
1077 new_exceptions = TYPE_RAISES_EXCEPTIONS (new_type);
1078 old_type = TREE_TYPE (old_decl);
1079 old_exceptions = TYPE_RAISES_EXCEPTIONS (old_type);
1083 If any declaration of a function has an exception-specification,
1084 all declarations, including the definition and an explicit
1085 specialization, of that function shall have an
1086 exception-specification with the same set of type-ids. */
1087 if ((pedantic || ! DECL_IN_SYSTEM_HEADER (old_decl))
1088 && ! DECL_IS_BUILTIN (old_decl)
1090 && !comp_except_specs (new_exceptions, old_exceptions,
1093 error ("declaration of %qF throws different exceptions", new_decl);
1094 error ("from previous declaration %q+F", old_decl);
1098 /* If NEWDECL is a redeclaration of OLDDECL, merge the declarations.
1099 If the redeclaration is invalid, a diagnostic is issued, and the
1100 error_mark_node is returned. Otherwise, OLDDECL is returned.
1102 If NEWDECL is not a redeclaration of OLDDECL, NULL_TREE is
1105 NEWDECL_IS_FRIEND is true if NEWDECL was declared as a friend. */
1108 duplicate_decls (tree newdecl, tree olddecl, bool newdecl_is_friend)
1110 unsigned olddecl_uid = DECL_UID (olddecl);
1111 int olddecl_friend = 0, types_match = 0, hidden_friend = 0;
1112 int new_defines_function = 0;
1115 if (newdecl == olddecl)
1118 types_match = decls_match (newdecl, olddecl);
1120 /* If either the type of the new decl or the type of the old decl is an
1121 error_mark_node, then that implies that we have already issued an
1122 error (earlier) for some bogus type specification, and in that case,
1123 it is rather pointless to harass the user with yet more error message
1124 about the same declaration, so just pretend the types match here. */
1125 if (TREE_TYPE (newdecl) == error_mark_node
1126 || TREE_TYPE (olddecl) == error_mark_node)
1127 return error_mark_node;
1129 if (DECL_P (olddecl)
1130 && TREE_CODE (newdecl) == FUNCTION_DECL
1131 && TREE_CODE (olddecl) == FUNCTION_DECL
1132 && (DECL_UNINLINABLE (newdecl) || DECL_UNINLINABLE (olddecl)))
1134 if (DECL_DECLARED_INLINE_P (newdecl)
1135 && DECL_UNINLINABLE (newdecl)
1136 && lookup_attribute ("noinline", DECL_ATTRIBUTES (newdecl)))
1137 /* Already warned elsewhere. */;
1138 else if (DECL_DECLARED_INLINE_P (olddecl)
1139 && DECL_UNINLINABLE (olddecl)
1140 && lookup_attribute ("noinline", DECL_ATTRIBUTES (olddecl)))
1141 /* Already warned. */;
1142 else if (DECL_DECLARED_INLINE_P (newdecl)
1143 && DECL_UNINLINABLE (olddecl)
1144 && lookup_attribute ("noinline", DECL_ATTRIBUTES (olddecl)))
1146 warning (OPT_Wattributes, "function %q+D redeclared as inline",
1148 warning (OPT_Wattributes, "previous declaration of %q+D "
1149 "with attribute noinline", olddecl);
1151 else if (DECL_DECLARED_INLINE_P (olddecl)
1152 && DECL_UNINLINABLE (newdecl)
1153 && lookup_attribute ("noinline", DECL_ATTRIBUTES (newdecl)))
1155 warning (OPT_Wattributes, "function %q+D redeclared with "
1156 "attribute noinline", newdecl);
1157 warning (OPT_Wattributes, "previous declaration of %q+D was inline",
1162 /* Check for redeclaration and other discrepancies. */
1163 if (TREE_CODE (olddecl) == FUNCTION_DECL
1164 && DECL_ARTIFICIAL (olddecl))
1166 gcc_assert (!DECL_HIDDEN_FRIEND_P (olddecl));
1167 if (TREE_CODE (newdecl) != FUNCTION_DECL)
1169 /* Avoid warnings redeclaring built-ins which have not been
1170 explicitly declared. */
1171 if (DECL_ANTICIPATED (olddecl))
1174 /* If you declare a built-in or predefined function name as static,
1175 the old definition is overridden, but optionally warn this was a
1176 bad choice of name. */
1177 if (! TREE_PUBLIC (newdecl))
1179 warning (OPT_Wshadow, "shadowing %s function %q#D",
1180 DECL_BUILT_IN (olddecl) ? "built-in" : "library",
1182 /* Discard the old built-in function. */
1185 /* If the built-in is not ansi, then programs can override
1186 it even globally without an error. */
1187 else if (! DECL_BUILT_IN (olddecl))
1188 warning (0, "library function %q#D redeclared as non-function %q#D",
1192 error ("declaration of %q#D", newdecl);
1193 error ("conflicts with built-in declaration %q#D",
1198 else if (!types_match)
1200 /* Avoid warnings redeclaring built-ins which have not been
1201 explicitly declared. */
1202 if (DECL_ANTICIPATED (olddecl))
1204 /* Deal with fileptr_type_node. FILE type is not known
1205 at the time we create the builtins. */
1208 for (t1 = TYPE_ARG_TYPES (TREE_TYPE (newdecl)),
1209 t2 = TYPE_ARG_TYPES (TREE_TYPE (olddecl));
1211 t1 = TREE_CHAIN (t1), t2 = TREE_CHAIN (t2))
1214 else if (TREE_VALUE (t2) == fileptr_type_node)
1216 tree t = TREE_VALUE (t1);
1218 if (TREE_CODE (t) == POINTER_TYPE
1219 && TYPE_NAME (TREE_TYPE (t))
1220 && DECL_NAME (TYPE_NAME (TREE_TYPE (t)))
1221 == get_identifier ("FILE")
1222 && compparms (TREE_CHAIN (t1), TREE_CHAIN (t2)))
1224 tree oldargs = TYPE_ARG_TYPES (TREE_TYPE (olddecl));
1226 TYPE_ARG_TYPES (TREE_TYPE (olddecl))
1227 = TYPE_ARG_TYPES (TREE_TYPE (newdecl));
1228 types_match = decls_match (newdecl, olddecl);
1230 return duplicate_decls (newdecl, olddecl,
1232 TYPE_ARG_TYPES (TREE_TYPE (olddecl)) = oldargs;
1235 else if (! same_type_p (TREE_VALUE (t1), TREE_VALUE (t2)))
1238 else if ((DECL_EXTERN_C_P (newdecl)
1239 && DECL_EXTERN_C_P (olddecl))
1240 || compparms (TYPE_ARG_TYPES (TREE_TYPE (newdecl)),
1241 TYPE_ARG_TYPES (TREE_TYPE (olddecl))))
1243 /* A near match; override the builtin. */
1245 if (TREE_PUBLIC (newdecl))
1247 warning (0, "new declaration %q#D", newdecl);
1248 warning (0, "ambiguates built-in declaration %q#D",
1252 warning (OPT_Wshadow, "shadowing %s function %q#D",
1253 DECL_BUILT_IN (olddecl) ? "built-in" : "library",
1257 /* Discard the old built-in function. */
1260 /* Replace the old RTL to avoid problems with inlining. */
1261 COPY_DECL_RTL (newdecl, olddecl);
1263 /* Even if the types match, prefer the new declarations type for
1264 built-ins which have not been explicitly declared, for
1265 exception lists, etc... */
1266 else if (DECL_ANTICIPATED (olddecl))
1268 tree type = TREE_TYPE (newdecl);
1269 tree attribs = (*targetm.merge_type_attributes)
1270 (TREE_TYPE (olddecl), type);
1272 type = cp_build_type_attribute_variant (type, attribs);
1273 TREE_TYPE (newdecl) = TREE_TYPE (olddecl) = type;
1276 /* Whether or not the builtin can throw exceptions has no
1277 bearing on this declarator. */
1278 TREE_NOTHROW (olddecl) = 0;
1280 if (DECL_THIS_STATIC (newdecl) && !DECL_THIS_STATIC (olddecl))
1282 /* If a builtin function is redeclared as `static', merge
1283 the declarations, but make the original one static. */
1284 DECL_THIS_STATIC (olddecl) = 1;
1285 TREE_PUBLIC (olddecl) = 0;
1287 /* Make the old declaration consistent with the new one so
1288 that all remnants of the builtin-ness of this function
1289 will be banished. */
1290 SET_DECL_LANGUAGE (olddecl, DECL_LANGUAGE (newdecl));
1291 COPY_DECL_RTL (newdecl, olddecl);
1294 else if (TREE_CODE (olddecl) != TREE_CODE (newdecl))
1296 if ((TREE_CODE (olddecl) == TYPE_DECL && DECL_ARTIFICIAL (olddecl)
1297 && TREE_CODE (newdecl) != TYPE_DECL
1298 && ! (TREE_CODE (newdecl) == TEMPLATE_DECL
1299 && TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == TYPE_DECL))
1300 || (TREE_CODE (newdecl) == TYPE_DECL && DECL_ARTIFICIAL (newdecl)
1301 && TREE_CODE (olddecl) != TYPE_DECL
1302 && ! (TREE_CODE (olddecl) == TEMPLATE_DECL
1303 && (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl))
1306 /* We do nothing special here, because C++ does such nasty
1307 things with TYPE_DECLs. Instead, just let the TYPE_DECL
1308 get shadowed, and know that if we need to find a TYPE_DECL
1309 for a given name, we can look in the IDENTIFIER_TYPE_VALUE
1310 slot of the identifier. */
1314 if ((TREE_CODE (newdecl) == FUNCTION_DECL
1315 && DECL_FUNCTION_TEMPLATE_P (olddecl))
1316 || (TREE_CODE (olddecl) == FUNCTION_DECL
1317 && DECL_FUNCTION_TEMPLATE_P (newdecl)))
1320 error ("%q#D redeclared as different kind of symbol", newdecl);
1321 if (TREE_CODE (olddecl) == TREE_LIST)
1322 olddecl = TREE_VALUE (olddecl);
1323 error ("previous declaration of %q+#D", olddecl);
1325 return error_mark_node;
1327 else if (!types_match)
1329 if (CP_DECL_CONTEXT (newdecl) != CP_DECL_CONTEXT (olddecl))
1330 /* These are certainly not duplicate declarations; they're
1331 from different scopes. */
1334 if (TREE_CODE (newdecl) == TEMPLATE_DECL)
1336 /* The name of a class template may not be declared to refer to
1337 any other template, class, function, object, namespace, value,
1338 or type in the same scope. */
1339 if (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl)) == TYPE_DECL
1340 || TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == TYPE_DECL)
1342 error ("declaration of template %q#D", newdecl);
1343 error ("conflicts with previous declaration %q+#D", olddecl);
1345 else if (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl)) == FUNCTION_DECL
1346 && TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == FUNCTION_DECL
1347 && compparms (TYPE_ARG_TYPES (TREE_TYPE (DECL_TEMPLATE_RESULT (olddecl))),
1348 TYPE_ARG_TYPES (TREE_TYPE (DECL_TEMPLATE_RESULT (newdecl))))
1349 && comp_template_parms (DECL_TEMPLATE_PARMS (newdecl),
1350 DECL_TEMPLATE_PARMS (olddecl))
1351 /* Template functions can be disambiguated by
1353 && same_type_p (TREE_TYPE (TREE_TYPE (newdecl)),
1354 TREE_TYPE (TREE_TYPE (olddecl))))
1356 error ("new declaration %q#D", newdecl);
1357 error ("ambiguates old declaration %q+#D", olddecl);
1361 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1363 if (DECL_EXTERN_C_P (newdecl) && DECL_EXTERN_C_P (olddecl))
1365 error ("declaration of C function %q#D conflicts with",
1367 error ("previous declaration %q+#D here", olddecl);
1369 else if (compparms (TYPE_ARG_TYPES (TREE_TYPE (newdecl)),
1370 TYPE_ARG_TYPES (TREE_TYPE (olddecl))))
1372 error ("new declaration %q#D", newdecl);
1373 error ("ambiguates old declaration %q+#D", olddecl);
1374 return error_mark_node;
1381 error ("conflicting declaration %q#D", newdecl);
1382 error ("%q+D has a previous declaration as %q#D", olddecl, olddecl);
1383 return error_mark_node;
1386 else if (TREE_CODE (newdecl) == FUNCTION_DECL
1387 && ((DECL_TEMPLATE_SPECIALIZATION (olddecl)
1388 && (!DECL_TEMPLATE_INFO (newdecl)
1389 || (DECL_TI_TEMPLATE (newdecl)
1390 != DECL_TI_TEMPLATE (olddecl))))
1391 || (DECL_TEMPLATE_SPECIALIZATION (newdecl)
1392 && (!DECL_TEMPLATE_INFO (olddecl)
1393 || (DECL_TI_TEMPLATE (olddecl)
1394 != DECL_TI_TEMPLATE (newdecl))))))
1395 /* It's OK to have a template specialization and a non-template
1396 with the same type, or to have specializations of two
1397 different templates with the same type. Note that if one is a
1398 specialization, and the other is an instantiation of the same
1399 template, that we do not exit at this point. That situation
1400 can occur if we instantiate a template class, and then
1401 specialize one of its methods. This situation is valid, but
1402 the declarations must be merged in the usual way. */
1404 else if (TREE_CODE (newdecl) == FUNCTION_DECL
1405 && ((DECL_TEMPLATE_INSTANTIATION (olddecl)
1406 && !DECL_USE_TEMPLATE (newdecl))
1407 || (DECL_TEMPLATE_INSTANTIATION (newdecl)
1408 && !DECL_USE_TEMPLATE (olddecl))))
1409 /* One of the declarations is a template instantiation, and the
1410 other is not a template at all. That's OK. */
1412 else if (TREE_CODE (newdecl) == NAMESPACE_DECL)
1414 /* In [namespace.alias] we have:
1416 In a declarative region, a namespace-alias-definition can be
1417 used to redefine a namespace-alias declared in that declarative
1418 region to refer only to the namespace to which it already
1421 Therefore, if we encounter a second alias directive for the same
1422 alias, we can just ignore the second directive. */
1423 if (DECL_NAMESPACE_ALIAS (newdecl)
1424 && (DECL_NAMESPACE_ALIAS (newdecl)
1425 == DECL_NAMESPACE_ALIAS (olddecl)))
1427 /* [namespace.alias]
1429 A namespace-name or namespace-alias shall not be declared as
1430 the name of any other entity in the same declarative region.
1431 A namespace-name defined at global scope shall not be
1432 declared as the name of any other entity in any global scope
1434 error ("declaration of namespace %qD conflicts with", newdecl);
1435 error ("previous declaration of namespace %q+D here", olddecl);
1436 return error_mark_node;
1440 const char *errmsg = redeclaration_error_message (newdecl, olddecl);
1443 error (errmsg, newdecl);
1444 if (DECL_NAME (olddecl) != NULL_TREE)
1445 error ((DECL_INITIAL (olddecl) && namespace_bindings_p ())
1446 ? "%q+#D previously defined here"
1447 : "%q+#D previously declared here", olddecl);
1448 return error_mark_node;
1450 else if (TREE_CODE (olddecl) == FUNCTION_DECL
1451 && DECL_INITIAL (olddecl) != NULL_TREE
1452 && TYPE_ARG_TYPES (TREE_TYPE (olddecl)) == NULL_TREE
1453 && TYPE_ARG_TYPES (TREE_TYPE (newdecl)) != NULL_TREE)
1455 /* Prototype decl follows defn w/o prototype. */
1456 warning (0, "prototype for %q+#D", newdecl);
1457 warning (0, "%Jfollows non-prototype definition here", olddecl);
1459 else if ((TREE_CODE (olddecl) == FUNCTION_DECL
1460 || TREE_CODE (olddecl) == VAR_DECL)
1461 && DECL_LANGUAGE (newdecl) != DECL_LANGUAGE (olddecl))
1464 If two declarations of the same function or object
1465 specify different linkage-specifications ..., the program
1466 is ill-formed.... Except for functions with C++ linkage,
1467 a function declaration without a linkage specification
1468 shall not precede the first linkage specification for
1469 that function. A function can be declared without a
1470 linkage specification after an explicit linkage
1471 specification has been seen; the linkage explicitly
1472 specified in the earlier declaration is not affected by
1473 such a function declaration.
1475 DR 563 raises the question why the restrictions on
1476 functions should not also apply to objects. Older
1477 versions of G++ silently ignore the linkage-specification
1485 which is clearly wrong. Therefore, we now treat objects
1487 if (current_lang_depth () == 0)
1489 /* There is no explicit linkage-specification, so we use
1490 the linkage from the previous declaration. */
1491 if (!DECL_LANG_SPECIFIC (newdecl))
1492 retrofit_lang_decl (newdecl);
1493 SET_DECL_LANGUAGE (newdecl, DECL_LANGUAGE (olddecl));
1497 error ("previous declaration of %q+#D with %qL linkage",
1498 olddecl, DECL_LANGUAGE (olddecl));
1499 error ("conflicts with new declaration with %qL linkage",
1500 DECL_LANGUAGE (newdecl));
1504 if (DECL_LANG_SPECIFIC (olddecl) && DECL_USE_TEMPLATE (olddecl))
1506 else if (TREE_CODE (olddecl) == FUNCTION_DECL)
1508 tree t1 = TYPE_ARG_TYPES (TREE_TYPE (olddecl));
1509 tree t2 = TYPE_ARG_TYPES (TREE_TYPE (newdecl));
1512 if (TREE_CODE (TREE_TYPE (newdecl)) == METHOD_TYPE)
1513 t1 = TREE_CHAIN (t1), t2 = TREE_CHAIN (t2);
1515 for (; t1 && t1 != void_list_node;
1516 t1 = TREE_CHAIN (t1), t2 = TREE_CHAIN (t2), i++)
1517 if (TREE_PURPOSE (t1) && TREE_PURPOSE (t2))
1519 if (1 == simple_cst_equal (TREE_PURPOSE (t1),
1522 pedwarn ("default argument given for parameter %d of %q#D",
1524 pedwarn ("after previous specification in %q+#D", olddecl);
1528 error ("default argument given for parameter %d of %q#D",
1530 error ("after previous specification in %q+#D",
1535 if (DECL_DECLARED_INLINE_P (newdecl)
1536 && ! DECL_DECLARED_INLINE_P (olddecl)
1537 && TREE_ADDRESSABLE (olddecl) && warn_inline)
1539 warning (0, "%q#D was used before it was declared inline", newdecl);
1540 warning (0, "%Jprevious non-inline declaration here", olddecl);
1545 /* Do not merge an implicit typedef with an explicit one. In:
1549 typedef class A A __attribute__ ((foo));
1551 the attribute should apply only to the typedef. */
1552 if (TREE_CODE (olddecl) == TYPE_DECL
1553 && (DECL_IMPLICIT_TYPEDEF_P (olddecl)
1554 || DECL_IMPLICIT_TYPEDEF_P (newdecl)))
1557 /* If new decl is `static' and an `extern' was seen previously,
1559 warn_extern_redeclared_static (newdecl, olddecl);
1561 /* We have committed to returning 1 at this point. */
1562 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1564 /* Now that functions must hold information normally held
1565 by field decls, there is extra work to do so that
1566 declaration information does not get destroyed during
1568 if (DECL_VINDEX (olddecl))
1569 DECL_VINDEX (newdecl) = DECL_VINDEX (olddecl);
1570 if (DECL_CONTEXT (olddecl))
1571 DECL_CONTEXT (newdecl) = DECL_CONTEXT (olddecl);
1572 DECL_STATIC_CONSTRUCTOR (newdecl) |= DECL_STATIC_CONSTRUCTOR (olddecl);
1573 DECL_STATIC_DESTRUCTOR (newdecl) |= DECL_STATIC_DESTRUCTOR (olddecl);
1574 DECL_PURE_VIRTUAL_P (newdecl) |= DECL_PURE_VIRTUAL_P (olddecl);
1575 DECL_VIRTUAL_P (newdecl) |= DECL_VIRTUAL_P (olddecl);
1576 DECL_THIS_STATIC (newdecl) |= DECL_THIS_STATIC (olddecl);
1577 if (DECL_OVERLOADED_OPERATOR_P (olddecl) != ERROR_MARK)
1578 SET_OVERLOADED_OPERATOR_CODE
1579 (newdecl, DECL_OVERLOADED_OPERATOR_P (olddecl));
1580 new_defines_function = DECL_INITIAL (newdecl) != NULL_TREE;
1582 /* Optionally warn about more than one declaration for the same
1583 name, but don't warn about a function declaration followed by a
1585 if (warn_redundant_decls && ! DECL_ARTIFICIAL (olddecl)
1586 && !(new_defines_function && DECL_INITIAL (olddecl) == NULL_TREE)
1587 /* Don't warn about extern decl followed by definition. */
1588 && !(DECL_EXTERNAL (olddecl) && ! DECL_EXTERNAL (newdecl))
1589 /* Don't warn about friends, let add_friend take care of it. */
1590 && ! (newdecl_is_friend || DECL_FRIEND_P (olddecl)))
1592 warning (OPT_Wredundant_decls, "redundant redeclaration of %qD in same scope", newdecl);
1593 warning (OPT_Wredundant_decls, "previous declaration of %q+D", olddecl);
1597 /* Deal with C++: must preserve virtual function table size. */
1598 if (TREE_CODE (olddecl) == TYPE_DECL)
1600 tree newtype = TREE_TYPE (newdecl);
1601 tree oldtype = TREE_TYPE (olddecl);
1603 if (newtype != error_mark_node && oldtype != error_mark_node
1604 && TYPE_LANG_SPECIFIC (newtype) && TYPE_LANG_SPECIFIC (oldtype))
1605 CLASSTYPE_FRIEND_CLASSES (newtype)
1606 = CLASSTYPE_FRIEND_CLASSES (oldtype);
1608 DECL_ORIGINAL_TYPE (newdecl) = DECL_ORIGINAL_TYPE (olddecl);
1611 /* Copy all the DECL_... slots specified in the new decl
1612 except for any that we copy here from the old type. */
1613 DECL_ATTRIBUTES (newdecl)
1614 = (*targetm.merge_decl_attributes) (olddecl, newdecl);
1616 if (TREE_CODE (newdecl) == TEMPLATE_DECL)
1620 old_result = DECL_TEMPLATE_RESULT (olddecl);
1621 new_result = DECL_TEMPLATE_RESULT (newdecl);
1622 TREE_TYPE (olddecl) = TREE_TYPE (old_result);
1623 DECL_TEMPLATE_SPECIALIZATIONS (olddecl)
1624 = chainon (DECL_TEMPLATE_SPECIALIZATIONS (olddecl),
1625 DECL_TEMPLATE_SPECIALIZATIONS (newdecl));
1627 if (DECL_FUNCTION_TEMPLATE_P (newdecl))
1629 DECL_INLINE (old_result)
1630 |= DECL_INLINE (new_result);
1631 DECL_DECLARED_INLINE_P (old_result)
1632 |= DECL_DECLARED_INLINE_P (new_result);
1633 check_redeclaration_exception_specification (newdecl, olddecl);
1636 /* If the new declaration is a definition, update the file and
1637 line information on the declaration. */
1638 if (DECL_INITIAL (old_result) == NULL_TREE
1639 && DECL_INITIAL (new_result) != NULL_TREE)
1641 DECL_SOURCE_LOCATION (olddecl)
1642 = DECL_SOURCE_LOCATION (old_result)
1643 = DECL_SOURCE_LOCATION (newdecl);
1644 if (DECL_FUNCTION_TEMPLATE_P (newdecl))
1645 DECL_ARGUMENTS (old_result)
1646 = DECL_ARGUMENTS (new_result);
1654 /* Automatically handles default parameters. */
1655 tree oldtype = TREE_TYPE (olddecl);
1658 /* Merge the data types specified in the two decls. */
1659 newtype = merge_types (TREE_TYPE (newdecl), TREE_TYPE (olddecl));
1661 /* If merge_types produces a non-typedef type, just use the old type. */
1662 if (TREE_CODE (newdecl) == TYPE_DECL
1663 && newtype == DECL_ORIGINAL_TYPE (newdecl))
1666 if (TREE_CODE (newdecl) == VAR_DECL)
1668 DECL_THIS_EXTERN (newdecl) |= DECL_THIS_EXTERN (olddecl);
1669 DECL_INITIALIZED_P (newdecl) |= DECL_INITIALIZED_P (olddecl);
1670 DECL_NONTRIVIALLY_INITIALIZED_P (newdecl)
1671 |= DECL_NONTRIVIALLY_INITIALIZED_P (olddecl);
1672 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (newdecl)
1673 |= DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (olddecl);
1675 /* Merge the threadprivate attribute from OLDDECL into NEWDECL. */
1676 if (DECL_LANG_SPECIFIC (olddecl)
1677 && CP_DECL_THREADPRIVATE_P (olddecl))
1679 /* Allocate a LANG_SPECIFIC structure for NEWDECL, if needed. */
1680 if (!DECL_LANG_SPECIFIC (newdecl))
1681 retrofit_lang_decl (newdecl);
1683 DECL_TLS_MODEL (newdecl) = DECL_TLS_MODEL (olddecl);
1684 CP_DECL_THREADPRIVATE_P (newdecl) = 1;
1688 /* Do this after calling `merge_types' so that default
1689 parameters don't confuse us. */
1690 else if (TREE_CODE (newdecl) == FUNCTION_DECL)
1691 check_redeclaration_exception_specification (newdecl, olddecl);
1692 TREE_TYPE (newdecl) = TREE_TYPE (olddecl) = newtype;
1694 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1695 check_default_args (newdecl);
1697 /* Lay the type out, unless already done. */
1698 if (! same_type_p (newtype, oldtype)
1699 && TREE_TYPE (newdecl) != error_mark_node
1700 && !(processing_template_decl && uses_template_parms (newdecl)))
1701 layout_type (TREE_TYPE (newdecl));
1703 if ((TREE_CODE (newdecl) == VAR_DECL
1704 || TREE_CODE (newdecl) == PARM_DECL
1705 || TREE_CODE (newdecl) == RESULT_DECL
1706 || TREE_CODE (newdecl) == FIELD_DECL
1707 || TREE_CODE (newdecl) == TYPE_DECL)
1708 && !(processing_template_decl && uses_template_parms (newdecl)))
1709 layout_decl (newdecl, 0);
1711 /* Merge the type qualifiers. */
1712 if (TREE_READONLY (newdecl))
1713 TREE_READONLY (olddecl) = 1;
1714 if (TREE_THIS_VOLATILE (newdecl))
1715 TREE_THIS_VOLATILE (olddecl) = 1;
1716 if (TREE_NOTHROW (newdecl))
1717 TREE_NOTHROW (olddecl) = 1;
1719 /* Merge deprecatedness. */
1720 if (TREE_DEPRECATED (newdecl))
1721 TREE_DEPRECATED (olddecl) = 1;
1723 /* Merge the initialization information. */
1724 if (DECL_INITIAL (newdecl) == NULL_TREE
1725 && DECL_INITIAL (olddecl) != NULL_TREE)
1727 DECL_INITIAL (newdecl) = DECL_INITIAL (olddecl);
1728 DECL_SOURCE_LOCATION (newdecl) = DECL_SOURCE_LOCATION (olddecl);
1729 if (CAN_HAVE_FULL_LANG_DECL_P (newdecl)
1730 && DECL_LANG_SPECIFIC (newdecl)
1731 && DECL_LANG_SPECIFIC (olddecl))
1733 DECL_SAVED_TREE (newdecl) = DECL_SAVED_TREE (olddecl);
1734 DECL_STRUCT_FUNCTION (newdecl) = DECL_STRUCT_FUNCTION (olddecl);
1738 /* Merge the section attribute.
1739 We want to issue an error if the sections conflict but that must be
1740 done later in decl_attributes since we are called before attributes
1742 if (DECL_SECTION_NAME (newdecl) == NULL_TREE)
1743 DECL_SECTION_NAME (newdecl) = DECL_SECTION_NAME (olddecl);
1745 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1747 DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (newdecl)
1748 |= DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (olddecl);
1749 DECL_NO_LIMIT_STACK (newdecl) |= DECL_NO_LIMIT_STACK (olddecl);
1750 TREE_THIS_VOLATILE (newdecl) |= TREE_THIS_VOLATILE (olddecl);
1751 TREE_READONLY (newdecl) |= TREE_READONLY (olddecl);
1752 TREE_NOTHROW (newdecl) |= TREE_NOTHROW (olddecl);
1753 DECL_IS_MALLOC (newdecl) |= DECL_IS_MALLOC (olddecl);
1754 DECL_IS_PURE (newdecl) |= DECL_IS_PURE (olddecl);
1755 /* Keep the old RTL. */
1756 COPY_DECL_RTL (olddecl, newdecl);
1758 else if (TREE_CODE (newdecl) == VAR_DECL
1759 && (DECL_SIZE (olddecl) || !DECL_SIZE (newdecl)))
1761 /* Keep the old RTL. We cannot keep the old RTL if the old
1762 declaration was for an incomplete object and the new
1763 declaration is not since many attributes of the RTL will
1765 COPY_DECL_RTL (olddecl, newdecl);
1768 /* If cannot merge, then use the new type and qualifiers,
1769 and don't preserve the old rtl. */
1772 /* Clean out any memory we had of the old declaration. */
1773 tree oldstatic = value_member (olddecl, static_aggregates);
1775 TREE_VALUE (oldstatic) = error_mark_node;
1777 TREE_TYPE (olddecl) = TREE_TYPE (newdecl);
1778 TREE_READONLY (olddecl) = TREE_READONLY (newdecl);
1779 TREE_THIS_VOLATILE (olddecl) = TREE_THIS_VOLATILE (newdecl);
1780 TREE_SIDE_EFFECTS (olddecl) = TREE_SIDE_EFFECTS (newdecl);
1783 /* Merge the storage class information. */
1784 merge_weak (newdecl, olddecl);
1786 DECL_ONE_ONLY (newdecl) |= DECL_ONE_ONLY (olddecl);
1787 DECL_DEFER_OUTPUT (newdecl) |= DECL_DEFER_OUTPUT (olddecl);
1788 TREE_PUBLIC (newdecl) = TREE_PUBLIC (olddecl);
1789 TREE_STATIC (olddecl) = TREE_STATIC (newdecl) |= TREE_STATIC (olddecl);
1790 if (! DECL_EXTERNAL (olddecl))
1791 DECL_EXTERNAL (newdecl) = 0;
1793 new_template = NULL_TREE;
1794 if (DECL_LANG_SPECIFIC (newdecl) && DECL_LANG_SPECIFIC (olddecl))
1796 DECL_INTERFACE_KNOWN (newdecl) |= DECL_INTERFACE_KNOWN (olddecl);
1797 DECL_NOT_REALLY_EXTERN (newdecl) |= DECL_NOT_REALLY_EXTERN (olddecl);
1798 DECL_COMDAT (newdecl) |= DECL_COMDAT (olddecl);
1799 DECL_TEMPLATE_INSTANTIATED (newdecl)
1800 |= DECL_TEMPLATE_INSTANTIATED (olddecl);
1802 /* If the OLDDECL is an instantiation and/or specialization,
1803 then the NEWDECL must be too. But, it may not yet be marked
1804 as such if the caller has created NEWDECL, but has not yet
1805 figured out that it is a redeclaration. */
1806 if (!DECL_USE_TEMPLATE (newdecl))
1807 DECL_USE_TEMPLATE (newdecl) = DECL_USE_TEMPLATE (olddecl);
1809 /* Don't really know how much of the language-specific
1810 values we should copy from old to new. */
1811 DECL_IN_AGGR_P (newdecl) = DECL_IN_AGGR_P (olddecl);
1812 DECL_LANG_SPECIFIC (newdecl)->decl_flags.u2 =
1813 DECL_LANG_SPECIFIC (olddecl)->decl_flags.u2;
1814 DECL_NONCONVERTING_P (newdecl) = DECL_NONCONVERTING_P (olddecl);
1815 DECL_REPO_AVAILABLE_P (newdecl) = DECL_REPO_AVAILABLE_P (olddecl);
1816 if (DECL_TEMPLATE_INFO (newdecl))
1817 new_template = DECL_TI_TEMPLATE (newdecl);
1818 DECL_TEMPLATE_INFO (newdecl) = DECL_TEMPLATE_INFO (olddecl);
1819 DECL_INITIALIZED_IN_CLASS_P (newdecl)
1820 |= DECL_INITIALIZED_IN_CLASS_P (olddecl);
1821 olddecl_friend = DECL_FRIEND_P (olddecl);
1822 hidden_friend = (DECL_ANTICIPATED (olddecl)
1823 && DECL_HIDDEN_FRIEND_P (olddecl)
1824 && newdecl_is_friend);
1826 /* Only functions have DECL_BEFRIENDING_CLASSES. */
1827 if (TREE_CODE (newdecl) == FUNCTION_DECL
1828 || DECL_FUNCTION_TEMPLATE_P (newdecl))
1830 DECL_BEFRIENDING_CLASSES (newdecl)
1831 = chainon (DECL_BEFRIENDING_CLASSES (newdecl),
1832 DECL_BEFRIENDING_CLASSES (olddecl));
1833 /* DECL_THUNKS is only valid for virtual functions,
1834 otherwise it is a DECL_FRIEND_CONTEXT. */
1835 if (DECL_VIRTUAL_P (newdecl))
1836 DECL_THUNKS (newdecl) = DECL_THUNKS (olddecl);
1840 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1842 if (DECL_TEMPLATE_INSTANTIATION (olddecl)
1843 && !DECL_TEMPLATE_INSTANTIATION (newdecl))
1845 /* If newdecl is not a specialization, then it is not a
1846 template-related function at all. And that means that we
1847 should have exited above, returning 0. */
1848 gcc_assert (DECL_TEMPLATE_SPECIALIZATION (newdecl));
1850 if (TREE_USED (olddecl))
1851 /* From [temp.expl.spec]:
1853 If a template, a member template or the member of a class
1854 template is explicitly specialized then that
1855 specialization shall be declared before the first use of
1856 that specialization that would cause an implicit
1857 instantiation to take place, in every translation unit in
1858 which such a use occurs. */
1859 error ("explicit specialization of %qD after first use",
1862 SET_DECL_TEMPLATE_SPECIALIZATION (olddecl);
1864 /* Don't propagate visibility from the template to the
1865 specialization here. We'll do that in determine_visibility if
1867 DECL_VISIBILITY_SPECIFIED (olddecl) = 0;
1869 /* [temp.expl.spec/14] We don't inline explicit specialization
1870 just because the primary template says so. */
1874 if (DECL_PENDING_INLINE_INFO (newdecl) == 0)
1875 DECL_PENDING_INLINE_INFO (newdecl) = DECL_PENDING_INLINE_INFO (olddecl);
1877 DECL_DECLARED_INLINE_P (newdecl) |= DECL_DECLARED_INLINE_P (olddecl);
1879 /* If either decl says `inline', this fn is inline, unless
1880 its definition was passed already. */
1881 if (DECL_INLINE (newdecl) && DECL_INITIAL (olddecl) == NULL_TREE)
1882 DECL_INLINE (olddecl) = 1;
1883 DECL_INLINE (newdecl) = DECL_INLINE (olddecl);
1885 DECL_UNINLINABLE (newdecl) = DECL_UNINLINABLE (olddecl)
1886 = (DECL_UNINLINABLE (newdecl) || DECL_UNINLINABLE (olddecl));
1889 /* Preserve abstractness on cloned [cd]tors. */
1890 DECL_ABSTRACT (newdecl) = DECL_ABSTRACT (olddecl);
1894 SET_DECL_LANGUAGE (olddecl, DECL_LANGUAGE (newdecl));
1895 COPY_DECL_ASSEMBLER_NAME (newdecl, olddecl);
1896 COPY_DECL_RTL (newdecl, olddecl);
1898 if (! types_match || new_defines_function)
1900 /* These need to be copied so that the names are available.
1901 Note that if the types do match, we'll preserve inline
1902 info and other bits, but if not, we won't. */
1903 DECL_ARGUMENTS (olddecl) = DECL_ARGUMENTS (newdecl);
1904 DECL_RESULT (olddecl) = DECL_RESULT (newdecl);
1906 if (new_defines_function)
1907 /* If defining a function declared with other language
1908 linkage, use the previously declared language linkage. */
1909 SET_DECL_LANGUAGE (newdecl, DECL_LANGUAGE (olddecl));
1910 else if (types_match)
1912 /* If redeclaring a builtin function, and not a definition,
1913 it stays built in. */
1914 if (DECL_BUILT_IN (olddecl))
1916 DECL_BUILT_IN_CLASS (newdecl) = DECL_BUILT_IN_CLASS (olddecl);
1917 DECL_FUNCTION_CODE (newdecl) = DECL_FUNCTION_CODE (olddecl);
1918 /* If we're keeping the built-in definition, keep the rtl,
1919 regardless of declaration matches. */
1920 COPY_DECL_RTL (olddecl, newdecl);
1923 DECL_RESULT (newdecl) = DECL_RESULT (olddecl);
1924 /* Don't clear out the arguments if we're redefining a function. */
1925 if (DECL_ARGUMENTS (olddecl))
1926 DECL_ARGUMENTS (newdecl) = DECL_ARGUMENTS (olddecl);
1929 else if (TREE_CODE (newdecl) == NAMESPACE_DECL)
1930 NAMESPACE_LEVEL (newdecl) = NAMESPACE_LEVEL (olddecl);
1932 /* Now preserve various other info from the definition. */
1933 TREE_ADDRESSABLE (newdecl) = TREE_ADDRESSABLE (olddecl);
1934 TREE_ASM_WRITTEN (newdecl) = TREE_ASM_WRITTEN (olddecl);
1935 DECL_COMMON (newdecl) = DECL_COMMON (olddecl);
1936 COPY_DECL_ASSEMBLER_NAME (olddecl, newdecl);
1938 /* Warn about conflicting visibility specifications. */
1939 if (DECL_VISIBILITY_SPECIFIED (olddecl)
1940 && DECL_VISIBILITY_SPECIFIED (newdecl)
1941 && DECL_VISIBILITY (newdecl) != DECL_VISIBILITY (olddecl))
1943 warning (OPT_Wattributes, "%q+D: visibility attribute ignored "
1944 "because it", newdecl);
1945 warning (OPT_Wattributes, "%Jconflicts with previous "
1946 "declaration here", olddecl);
1948 /* Choose the declaration which specified visibility. */
1949 if (DECL_VISIBILITY_SPECIFIED (olddecl))
1951 DECL_VISIBILITY (newdecl) = DECL_VISIBILITY (olddecl);
1952 DECL_VISIBILITY_SPECIFIED (newdecl) = 1;
1954 /* Init priority used to be merged from newdecl to olddecl by the memcpy,
1955 so keep this behavior. */
1956 if (TREE_CODE (newdecl) == VAR_DECL && DECL_HAS_INIT_PRIORITY_P (newdecl))
1958 SET_DECL_INIT_PRIORITY (olddecl, DECL_INIT_PRIORITY (newdecl));
1959 DECL_HAS_INIT_PRIORITY_P (olddecl) = 1;
1962 /* The DECL_LANG_SPECIFIC information in OLDDECL will be replaced
1963 with that from NEWDECL below. */
1964 if (DECL_LANG_SPECIFIC (olddecl))
1966 gcc_assert (DECL_LANG_SPECIFIC (olddecl)
1967 != DECL_LANG_SPECIFIC (newdecl));
1968 ggc_free (DECL_LANG_SPECIFIC (olddecl));
1971 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1975 function_size = sizeof (struct tree_decl_common);
1977 memcpy ((char *) olddecl + sizeof (struct tree_common),
1978 (char *) newdecl + sizeof (struct tree_common),
1979 function_size - sizeof (struct tree_common));
1981 memcpy ((char *) olddecl + sizeof (struct tree_decl_common),
1982 (char *) newdecl + sizeof (struct tree_decl_common),
1983 sizeof (struct tree_function_decl) - sizeof (struct tree_decl_common));
1985 /* If newdecl is a template instantiation, it is possible that
1986 the following sequence of events has occurred:
1988 o A friend function was declared in a class template. The
1989 class template was instantiated.
1991 o The instantiation of the friend declaration was
1992 recorded on the instantiation list, and is newdecl.
1994 o Later, however, instantiate_class_template called pushdecl
1995 on the newdecl to perform name injection. But, pushdecl in
1996 turn called duplicate_decls when it discovered that another
1997 declaration of a global function with the same name already
2000 o Here, in duplicate_decls, we decided to clobber newdecl.
2002 If we're going to do that, we'd better make sure that
2003 olddecl, and not newdecl, is on the list of
2004 instantiations so that if we try to do the instantiation
2005 again we won't get the clobbered declaration. */
2006 reregister_specialization (newdecl,
2012 size_t size = tree_code_size (TREE_CODE (olddecl));
2013 memcpy ((char *) olddecl + sizeof (struct tree_common),
2014 (char *) newdecl + sizeof (struct tree_common),
2015 sizeof (struct tree_decl_common) - sizeof (struct tree_common));
2016 switch (TREE_CODE (olddecl))
2026 memcpy ((char *) olddecl + sizeof (struct tree_decl_common),
2027 (char *) newdecl + sizeof (struct tree_decl_common),
2028 size - sizeof (struct tree_decl_common)
2029 + TREE_CODE_LENGTH (TREE_CODE (newdecl)) * sizeof (char *));
2033 memcpy ((char *) olddecl + sizeof (struct tree_decl_common),
2034 (char *) newdecl + sizeof (struct tree_decl_common),
2035 sizeof (struct tree_decl_non_common) - sizeof (struct tree_decl_common)
2036 + TREE_CODE_LENGTH (TREE_CODE (newdecl)) * sizeof (char *));
2040 DECL_UID (olddecl) = olddecl_uid;
2042 DECL_FRIEND_P (olddecl) = 1;
2045 DECL_ANTICIPATED (olddecl) = 1;
2046 DECL_HIDDEN_FRIEND_P (olddecl) = 1;
2049 /* NEWDECL contains the merged attribute lists.
2050 Update OLDDECL to be the same. */
2051 DECL_ATTRIBUTES (olddecl) = DECL_ATTRIBUTES (newdecl);
2053 /* If OLDDECL had its DECL_RTL instantiated, re-invoke make_decl_rtl
2054 so that encode_section_info has a chance to look at the new decl
2055 flags and attributes. */
2056 if (DECL_RTL_SET_P (olddecl)
2057 && (TREE_CODE (olddecl) == FUNCTION_DECL
2058 || (TREE_CODE (olddecl) == VAR_DECL
2059 && TREE_STATIC (olddecl))))
2060 make_decl_rtl (olddecl);
2062 /* The NEWDECL will no longer be needed. Because every out-of-class
2063 declaration of a member results in a call to duplicate_decls,
2064 freeing these nodes represents in a significant savings. */
2070 /* Return zero if the declaration NEWDECL is valid
2071 when the declaration OLDDECL (assumed to be for the same name)
2072 has already been seen.
2073 Otherwise return an error message format string with a %s
2074 where the identifier should go. */
2077 redeclaration_error_message (tree newdecl, tree olddecl)
2079 if (TREE_CODE (newdecl) == TYPE_DECL)
2081 /* Because C++ can put things into name space for free,
2082 constructs like "typedef struct foo { ... } foo"
2083 would look like an erroneous redeclaration. */
2084 if (same_type_p (TREE_TYPE (newdecl), TREE_TYPE (olddecl)))
2087 return "redefinition of %q#D";
2089 else if (TREE_CODE (newdecl) == FUNCTION_DECL)
2091 /* If this is a pure function, its olddecl will actually be
2092 the original initialization to `0' (which we force to call
2093 abort()). Don't complain about redefinition in this case. */
2094 if (DECL_LANG_SPECIFIC (olddecl) && DECL_PURE_VIRTUAL_P (olddecl)
2095 && DECL_INITIAL (olddecl) == NULL_TREE)
2098 /* If both functions come from different namespaces, this is not
2099 a redeclaration - this is a conflict with a used function. */
2100 if (DECL_NAMESPACE_SCOPE_P (olddecl)
2101 && DECL_CONTEXT (olddecl) != DECL_CONTEXT (newdecl)
2102 && ! decls_match (olddecl, newdecl))
2103 return "%qD conflicts with used function";
2105 /* We'll complain about linkage mismatches in
2106 warn_extern_redeclared_static. */
2108 /* Defining the same name twice is no good. */
2109 if (DECL_INITIAL (olddecl) != NULL_TREE
2110 && DECL_INITIAL (newdecl) != NULL_TREE)
2112 if (DECL_NAME (olddecl) == NULL_TREE)
2113 return "%q#D not declared in class";
2115 return "redefinition of %q#D";
2119 else if (TREE_CODE (newdecl) == TEMPLATE_DECL)
2123 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == TYPE_DECL)
2125 if (COMPLETE_TYPE_P (TREE_TYPE (newdecl))
2126 && COMPLETE_TYPE_P (TREE_TYPE (olddecl)))
2127 return "redefinition of %q#D";
2131 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) != FUNCTION_DECL
2132 || (DECL_TEMPLATE_RESULT (newdecl)
2133 == DECL_TEMPLATE_RESULT (olddecl)))
2136 nt = DECL_TEMPLATE_RESULT (newdecl);
2137 if (DECL_TEMPLATE_INFO (nt))
2138 nt = DECL_TEMPLATE_RESULT (template_for_substitution (nt));
2139 ot = DECL_TEMPLATE_RESULT (olddecl);
2140 if (DECL_TEMPLATE_INFO (ot))
2141 ot = DECL_TEMPLATE_RESULT (template_for_substitution (ot));
2142 if (DECL_INITIAL (nt) && DECL_INITIAL (ot))
2143 return "redefinition of %q#D";
2147 else if (TREE_CODE (newdecl) == VAR_DECL
2148 && DECL_THREAD_LOCAL_P (newdecl) != DECL_THREAD_LOCAL_P (olddecl)
2149 && (! DECL_LANG_SPECIFIC (olddecl)
2150 || ! CP_DECL_THREADPRIVATE_P (olddecl)
2151 || DECL_THREAD_LOCAL_P (newdecl)))
2153 /* Only variables can be thread-local, and all declarations must
2154 agree on this property. */
2155 if (DECL_THREAD_LOCAL_P (newdecl))
2156 return "thread-local declaration of %q#D follows "
2157 "non-thread-local declaration";
2159 return "non-thread-local declaration of %q#D follows "
2160 "thread-local declaration";
2162 else if (toplevel_bindings_p () || DECL_NAMESPACE_SCOPE_P (newdecl))
2164 /* Objects declared at top level: */
2165 /* If at least one is a reference, it's ok. */
2166 if (DECL_EXTERNAL (newdecl) || DECL_EXTERNAL (olddecl))
2168 /* Reject two definitions. */
2169 return "redefinition of %q#D";
2173 /* Objects declared with block scope: */
2174 /* Reject two definitions, and reject a definition
2175 together with an external reference. */
2176 if (!(DECL_EXTERNAL (newdecl) && DECL_EXTERNAL (olddecl)))
2177 return "redeclaration of %q#D";
2182 /* Hash and equality functions for the named_label table. */
2185 named_label_entry_hash (const void *data)
2187 const struct named_label_entry *ent = (const struct named_label_entry *) data;
2188 return DECL_UID (ent->label_decl);
2192 named_label_entry_eq (const void *a, const void *b)
2194 const struct named_label_entry *ent_a = (const struct named_label_entry *) a;
2195 const struct named_label_entry *ent_b = (const struct named_label_entry *) b;
2196 return ent_a->label_decl == ent_b->label_decl;
2199 /* Create a new label, named ID. */
2202 make_label_decl (tree id, int local_p)
2204 struct named_label_entry *ent;
2208 decl = build_decl (LABEL_DECL, id, void_type_node);
2210 DECL_CONTEXT (decl) = current_function_decl;
2211 DECL_MODE (decl) = VOIDmode;
2212 C_DECLARED_LABEL_FLAG (decl) = local_p;
2214 /* Say where one reference is to the label, for the sake of the
2215 error if it is not defined. */
2216 DECL_SOURCE_LOCATION (decl) = input_location;
2218 /* Record the fact that this identifier is bound to this label. */
2219 SET_IDENTIFIER_LABEL_VALUE (id, decl);
2221 /* Create the label htab for the function on demand. */
2223 named_labels = htab_create_ggc (13, named_label_entry_hash,
2224 named_label_entry_eq, NULL);
2226 /* Record this label on the list of labels used in this function.
2227 We do this before calling make_label_decl so that we get the
2228 IDENTIFIER_LABEL_VALUE before the new label is declared. */
2229 ent = GGC_CNEW (struct named_label_entry);
2230 ent->label_decl = decl;
2232 slot = htab_find_slot (named_labels, ent, INSERT);
2233 gcc_assert (*slot == NULL);
2239 /* Look for a label named ID in the current function. If one cannot
2240 be found, create one. (We keep track of used, but undefined,
2241 labels, and complain about them at the end of a function.) */
2244 lookup_label (tree id)
2248 timevar_push (TV_NAME_LOOKUP);
2249 /* You can't use labels at global scope. */
2250 if (current_function_decl == NULL_TREE)
2252 error ("label %qE referenced outside of any function", id);
2253 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, NULL_TREE);
2256 /* See if we've already got this label. */
2257 decl = IDENTIFIER_LABEL_VALUE (id);
2258 if (decl != NULL_TREE && DECL_CONTEXT (decl) == current_function_decl)
2259 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, decl);
2261 decl = make_label_decl (id, /*local_p=*/0);
2262 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, decl);
2265 /* Declare a local label named ID. */
2268 declare_local_label (tree id)
2272 /* Add a new entry to the SHADOWED_LABELS list so that when we leave
2273 this scope we can restore the old value of IDENTIFIER_TYPE_VALUE. */
2274 shadow = tree_cons (IDENTIFIER_LABEL_VALUE (id), NULL_TREE,
2275 current_binding_level->shadowed_labels);
2276 current_binding_level->shadowed_labels = shadow;
2278 decl = make_label_decl (id, /*local_p=*/1);
2279 TREE_VALUE (shadow) = decl;
2284 /* Returns nonzero if it is ill-formed to jump past the declaration of
2285 DECL. Returns 2 if it's also a real problem. */
2288 decl_jump_unsafe (tree decl)
2290 if (TREE_CODE (decl) != VAR_DECL || TREE_STATIC (decl)
2291 || TREE_TYPE (decl) == error_mark_node)
2294 if (TYPE_NEEDS_CONSTRUCTING (TREE_TYPE (decl))
2295 || DECL_NONTRIVIALLY_INITIALIZED_P (decl))
2298 if (pod_type_p (TREE_TYPE (decl)))
2301 /* The POD stuff is just pedantry; why should it matter if the class
2302 contains a field of pointer to member type? */
2306 /* A subroutine of check_previous_goto_1 to identify a branch to the user. */
2309 identify_goto (tree decl, const location_t *locus)
2312 pedwarn ("jump to label %qD", decl);
2314 pedwarn ("jump to case label");
2316 pedwarn ("%H from here", locus);
2319 /* Check that a single previously seen jump to a newly defined label
2320 is OK. DECL is the LABEL_DECL or 0; LEVEL is the binding_level for
2321 the jump context; NAMES are the names in scope in LEVEL at the jump
2322 context; LOCUS is the source position of the jump or 0. Returns
2323 true if all is well. */
2326 check_previous_goto_1 (tree decl, struct cp_binding_level* level, tree names,
2327 bool exited_omp, const location_t *locus)
2329 struct cp_binding_level *b;
2330 bool identified = false, saw_eh = false, saw_omp = false;
2334 identify_goto (decl, locus);
2335 error (" exits OpenMP structured block");
2336 identified = saw_omp = true;
2339 for (b = current_binding_level; b ; b = b->level_chain)
2341 tree new_decls, old_decls = (b == level ? names : NULL_TREE);
2343 for (new_decls = b->names; new_decls != old_decls;
2344 new_decls = TREE_CHAIN (new_decls))
2346 int problem = decl_jump_unsafe (new_decls);
2352 identify_goto (decl, locus);
2356 error (" crosses initialization of %q+#D", new_decls);
2358 pedwarn (" enters scope of non-POD %q+#D", new_decls);
2363 if ((b->kind == sk_try || b->kind == sk_catch) && !saw_eh)
2367 identify_goto (decl, locus);
2370 if (b->kind == sk_try)
2371 error (" enters try block");
2373 error (" enters catch block");
2376 if (b->kind == sk_omp && !saw_omp)
2380 identify_goto (decl, locus);
2383 error (" enters OpenMP structured block");
2392 check_previous_goto (tree decl, struct named_label_use_entry *use)
2394 check_previous_goto_1 (decl, use->binding_level,
2395 use->names_in_scope, use->in_omp_scope,
2396 &use->o_goto_locus);
2400 check_switch_goto (struct cp_binding_level* level)
2402 return check_previous_goto_1 (NULL_TREE, level, level->names, false, NULL);
2405 /* Check that a new jump to a label DECL is OK. Called by
2406 finish_goto_stmt. */
2409 check_goto (tree decl)
2411 struct named_label_entry *ent, dummy;
2412 bool saw_catch = false, identified = false;
2415 /* We can't know where a computed goto is jumping.
2416 So we assume that it's OK. */
2417 if (TREE_CODE (decl) != LABEL_DECL)
2420 /* We didn't record any information about this label when we created it,
2421 and there's not much point since it's trivial to analyze as a return. */
2422 if (decl == cdtor_label)
2425 dummy.label_decl = decl;
2426 ent = (struct named_label_entry *) htab_find (named_labels, &dummy);
2427 gcc_assert (ent != NULL);
2429 /* If the label hasn't been defined yet, defer checking. */
2430 if (! DECL_INITIAL (decl))
2432 struct named_label_use_entry *new_use;
2434 /* Don't bother creating another use if the last goto had the
2435 same data, and will therefore create the same set of errors. */
2437 && ent->uses->names_in_scope == current_binding_level->names)
2440 new_use = GGC_NEW (struct named_label_use_entry);
2441 new_use->binding_level = current_binding_level;
2442 new_use->names_in_scope = current_binding_level->names;
2443 new_use->o_goto_locus = input_location;
2444 new_use->in_omp_scope = false;
2446 new_use->next = ent->uses;
2447 ent->uses = new_use;
2451 if (ent->in_try_scope || ent->in_catch_scope
2452 || ent->in_omp_scope || ent->bad_decls)
2454 pedwarn ("jump to label %q+D", decl);
2455 pedwarn (" from here");
2459 for (bad = ent->bad_decls; bad; bad = TREE_CHAIN (bad))
2461 tree b = TREE_VALUE (bad);
2462 int u = decl_jump_unsafe (b);
2464 if (u > 1 && DECL_ARTIFICIAL (b))
2466 /* Can't skip init of __exception_info. */
2467 error ("%J enters catch block", b);
2471 error (" skips initialization of %q+#D", b);
2473 pedwarn (" enters scope of non-POD %q+#D", b);
2476 if (ent->in_try_scope)
2477 error (" enters try block");
2478 else if (ent->in_catch_scope && !saw_catch)
2479 error (" enters catch block");
2481 if (ent->in_omp_scope)
2482 error (" enters OpenMP structured block");
2483 else if (flag_openmp)
2485 struct cp_binding_level *b;
2486 for (b = current_binding_level; b ; b = b->level_chain)
2488 if (b == ent->binding_level)
2490 if (b->kind == sk_omp)
2494 pedwarn ("jump to label %q+D", decl);
2495 pedwarn (" from here");
2498 error (" exits OpenMP structured block");
2505 /* Check that a return is ok wrt OpenMP structured blocks.
2506 Called by finish_return_stmt. Returns true if all is well. */
2509 check_omp_return (void)
2511 struct cp_binding_level *b;
2512 for (b = current_binding_level; b ; b = b->level_chain)
2513 if (b->kind == sk_omp)
2515 error ("invalid exit from OpenMP structured block");
2521 /* Define a label, specifying the location in the source file.
2522 Return the LABEL_DECL node for the label. */
2525 define_label (location_t location, tree name)
2527 struct named_label_entry *ent, dummy;
2528 struct cp_binding_level *p;
2531 timevar_push (TV_NAME_LOOKUP);
2533 decl = lookup_label (name);
2535 dummy.label_decl = decl;
2536 ent = (struct named_label_entry *) htab_find (named_labels, &dummy);
2537 gcc_assert (ent != NULL);
2539 /* After labels, make any new cleanups in the function go into their
2540 own new (temporary) binding contour. */
2541 for (p = current_binding_level;
2542 p->kind != sk_function_parms;
2544 p->more_cleanups_ok = 0;
2546 if (name == get_identifier ("wchar_t"))
2547 pedwarn ("label named wchar_t");
2549 if (DECL_INITIAL (decl) != NULL_TREE)
2551 error ("duplicate label %qD", decl);
2552 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
2556 struct named_label_use_entry *use;
2558 /* Mark label as having been defined. */
2559 DECL_INITIAL (decl) = error_mark_node;
2560 /* Say where in the source. */
2561 DECL_SOURCE_LOCATION (decl) = location;
2563 ent->binding_level = current_binding_level;
2564 ent->names_in_scope = current_binding_level->names;
2566 for (use = ent->uses; use ; use = use->next)
2567 check_previous_goto (decl, use);
2571 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, decl);
2576 struct cp_binding_level *level;
2577 struct cp_switch *next;
2578 /* The SWITCH_STMT being built. */
2580 /* A splay-tree mapping the low element of a case range to the high
2581 element, or NULL_TREE if there is no high element. Used to
2582 determine whether or not a new case label duplicates an old case
2583 label. We need a tree, rather than simply a hash table, because
2584 of the GNU case range extension. */
2588 /* A stack of the currently active switch statements. The innermost
2589 switch statement is on the top of the stack. There is no need to
2590 mark the stack for garbage collection because it is only active
2591 during the processing of the body of a function, and we never
2592 collect at that point. */
2594 static struct cp_switch *switch_stack;
2596 /* Called right after a switch-statement condition is parsed.
2597 SWITCH_STMT is the switch statement being parsed. */
2600 push_switch (tree switch_stmt)
2602 struct cp_switch *p = XNEW (struct cp_switch);
2603 p->level = current_binding_level;
2604 p->next = switch_stack;
2605 p->switch_stmt = switch_stmt;
2606 p->cases = splay_tree_new (case_compare, NULL, NULL);
2613 struct cp_switch *cs = switch_stack;
2614 location_t switch_location;
2616 /* Emit warnings as needed. */
2617 if (EXPR_HAS_LOCATION (cs->switch_stmt))
2618 switch_location = EXPR_LOCATION (cs->switch_stmt);
2620 switch_location = input_location;
2621 if (!processing_template_decl)
2622 c_do_switch_warnings (cs->cases, switch_location,
2623 SWITCH_STMT_TYPE (cs->switch_stmt),
2624 SWITCH_STMT_COND (cs->switch_stmt));
2626 splay_tree_delete (cs->cases);
2627 switch_stack = switch_stack->next;
2631 /* Note that we've seen a definition of a case label, and complain if this
2632 is a bad place for one. */
2635 finish_case_label (tree low_value, tree high_value)
2638 struct cp_binding_level *p;
2640 if (processing_template_decl)
2644 /* For templates, just add the case label; we'll do semantic
2645 analysis at instantiation-time. */
2646 label = build_decl (LABEL_DECL, NULL_TREE, NULL_TREE);
2647 return add_stmt (build_case_label (low_value, high_value, label));
2650 /* Find the condition on which this switch statement depends. */
2651 cond = SWITCH_STMT_COND (switch_stack->switch_stmt);
2652 if (cond && TREE_CODE (cond) == TREE_LIST)
2653 cond = TREE_VALUE (cond);
2655 if (!check_switch_goto (switch_stack->level))
2656 return error_mark_node;
2658 r = c_add_case_label (switch_stack->cases, cond, TREE_TYPE (cond),
2659 low_value, high_value);
2661 /* After labels, make any new cleanups in the function go into their
2662 own new (temporary) binding contour. */
2663 for (p = current_binding_level;
2664 p->kind != sk_function_parms;
2666 p->more_cleanups_ok = 0;
2671 /* Hash a TYPENAME_TYPE. K is really of type `tree'. */
2674 typename_hash (const void* k)
2679 hash = (htab_hash_pointer (TYPE_CONTEXT (t))
2680 ^ htab_hash_pointer (DECL_NAME (TYPE_NAME (t))));
2685 typedef struct typename_info {
2693 /* Compare two TYPENAME_TYPEs. K1 and K2 are really of type `tree'. */
2696 typename_compare (const void * k1, const void * k2)
2699 const typename_info *t2;
2702 t2 = (const typename_info *) k2;
2704 return (DECL_NAME (TYPE_NAME (t1)) == t2->name
2705 && TYPE_CONTEXT (t1) == t2->scope
2706 && TYPENAME_TYPE_FULLNAME (t1) == t2->template_id
2707 && TYPENAME_IS_ENUM_P (t1) == t2->enum_p
2708 && TYPENAME_IS_CLASS_P (t1) == t2->class_p);
2711 /* Build a TYPENAME_TYPE. If the type is `typename T::t', CONTEXT is
2712 the type of `T', NAME is the IDENTIFIER_NODE for `t'.
2714 Returns the new TYPENAME_TYPE. */
2716 static GTY ((param_is (union tree_node))) htab_t typename_htab;
2719 build_typename_type (tree context, tree name, tree fullname,
2720 enum tag_types tag_type)
2728 if (typename_htab == NULL)
2729 typename_htab = htab_create_ggc (61, &typename_hash,
2730 &typename_compare, NULL);
2732 ti.scope = FROB_CONTEXT (context);
2734 ti.template_id = fullname;
2735 ti.enum_p = tag_type == enum_type;
2736 ti.class_p = (tag_type == class_type
2737 || tag_type == record_type
2738 || tag_type == union_type);
2739 hash = (htab_hash_pointer (ti.scope)
2740 ^ htab_hash_pointer (ti.name));
2742 /* See if we already have this type. */
2743 e = htab_find_slot_with_hash (typename_htab, &ti, hash, INSERT);
2748 /* Build the TYPENAME_TYPE. */
2749 t = make_aggr_type (TYPENAME_TYPE);
2750 TYPE_CONTEXT (t) = ti.scope;
2751 TYPENAME_TYPE_FULLNAME (t) = ti.template_id;
2752 TYPENAME_IS_ENUM_P (t) = ti.enum_p;
2753 TYPENAME_IS_CLASS_P (t) = ti.class_p;
2755 /* Build the corresponding TYPE_DECL. */
2756 d = build_decl (TYPE_DECL, name, t);
2757 TYPE_NAME (TREE_TYPE (d)) = d;
2758 TYPE_STUB_DECL (TREE_TYPE (d)) = d;
2759 DECL_CONTEXT (d) = FROB_CONTEXT (context);
2760 DECL_ARTIFICIAL (d) = 1;
2762 /* Store it in the hash table. */
2769 /* Resolve `typename CONTEXT::NAME'. TAG_TYPE indicates the tag
2770 provided to name the type. Returns an appropriate type, unless an
2771 error occurs, in which case error_mark_node is returned. If we
2772 locate a non-artificial TYPE_DECL and TF_KEEP_TYPE_DECL is set, we
2773 return that, rather than the _TYPE it corresponds to, in other
2774 cases we look through the type decl. If TF_ERROR is set, complain
2775 about errors, otherwise be quiet. */
2778 make_typename_type (tree context, tree name, enum tag_types tag_type,
2779 tsubst_flags_t complain)
2785 if (name == error_mark_node
2786 || context == NULL_TREE
2787 || context == error_mark_node)
2788 return error_mark_node;
2792 if (!(TYPE_LANG_SPECIFIC (name)
2793 && (CLASSTYPE_IS_TEMPLATE (name)
2794 || CLASSTYPE_USE_TEMPLATE (name))))
2795 name = TYPE_IDENTIFIER (name);
2797 /* Create a TEMPLATE_ID_EXPR for the type. */
2798 name = build_nt (TEMPLATE_ID_EXPR,
2799 CLASSTYPE_TI_TEMPLATE (name),
2800 CLASSTYPE_TI_ARGS (name));
2802 else if (TREE_CODE (name) == TYPE_DECL)
2803 name = DECL_NAME (name);
2807 if (TREE_CODE (name) == TEMPLATE_ID_EXPR)
2809 name = TREE_OPERAND (name, 0);
2810 if (TREE_CODE (name) == TEMPLATE_DECL)
2811 name = TREE_OPERAND (fullname, 0) = DECL_NAME (name);
2813 if (TREE_CODE (name) == TEMPLATE_DECL)
2815 error ("%qD used without template parameters", name);
2816 return error_mark_node;
2818 gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE);
2819 gcc_assert (TYPE_P (context));
2821 /* When the CONTEXT is a dependent type, NAME could refer to a
2822 dependent base class of CONTEXT. So we cannot peek inside it,
2823 even if CONTEXT is a currently open scope. */
2824 if (dependent_type_p (context))
2825 return build_typename_type (context, name, fullname, tag_type);
2827 if (!IS_AGGR_TYPE (context))
2829 if (complain & tf_error)
2830 error ("%q#T is not a class", context);
2831 return error_mark_node;
2834 want_template = TREE_CODE (fullname) == TEMPLATE_ID_EXPR;
2836 /* We should only set WANT_TYPE when we're a nested typename type.
2837 Then we can give better diagnostics if we find a non-type. */
2838 t = lookup_field (context, name, 0, /*want_type=*/true);
2841 if (complain & tf_error)
2842 error (want_template ? "no class template named %q#T in %q#T"
2843 : "no type named %q#T in %q#T", name, context);
2844 return error_mark_node;
2847 if (want_template && !DECL_CLASS_TEMPLATE_P (t))
2849 if (complain & tf_error)
2850 error ("%<typename %T::%D%> names %q#T, which is not a class template",
2852 return error_mark_node;
2854 if (!want_template && TREE_CODE (t) != TYPE_DECL)
2856 if (complain & tf_error)
2857 error ("%<typename %T::%D%> names %q#T, which is not a type",
2859 return error_mark_node;
2862 if (complain & tf_error)
2863 perform_or_defer_access_check (TYPE_BINFO (context), t);
2866 return lookup_template_class (t, TREE_OPERAND (fullname, 1),
2868 /*entering_scope=*/0,
2869 tf_warning_or_error | tf_user);
2871 if (DECL_ARTIFICIAL (t) || !(complain & tf_keep_type_decl))
2877 /* Resolve `CONTEXT::template NAME'. Returns a TEMPLATE_DECL if the name
2878 can be resolved or an UNBOUND_CLASS_TEMPLATE, unless an error occurs,
2879 in which case error_mark_node is returned.
2881 If PARM_LIST is non-NULL, also make sure that the template parameter
2882 list of TEMPLATE_DECL matches.
2884 If COMPLAIN zero, don't complain about any errors that occur. */
2887 make_unbound_class_template (tree context, tree name, tree parm_list,
2888 tsubst_flags_t complain)
2894 name = TYPE_IDENTIFIER (name);
2895 else if (DECL_P (name))
2896 name = DECL_NAME (name);
2897 gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE);
2899 if (!dependent_type_p (context)
2900 || currently_open_class (context))
2902 tree tmpl = NULL_TREE;
2904 if (IS_AGGR_TYPE (context))
2905 tmpl = lookup_field (context, name, 0, false);
2907 if (!tmpl || !DECL_CLASS_TEMPLATE_P (tmpl))
2909 if (complain & tf_error)
2910 error ("no class template named %q#T in %q#T", name, context);
2911 return error_mark_node;
2915 && !comp_template_parms (DECL_TEMPLATE_PARMS (tmpl), parm_list))
2917 if (complain & tf_error)
2919 error ("template parameters do not match template");
2920 error ("%q+D declared here", tmpl);
2922 return error_mark_node;
2925 if (complain & tf_error)
2926 perform_or_defer_access_check (TYPE_BINFO (context), tmpl);
2931 /* Build the UNBOUND_CLASS_TEMPLATE. */
2932 t = make_aggr_type (UNBOUND_CLASS_TEMPLATE);
2933 TYPE_CONTEXT (t) = FROB_CONTEXT (context);
2934 TREE_TYPE (t) = NULL_TREE;
2936 /* Build the corresponding TEMPLATE_DECL. */
2937 d = build_decl (TEMPLATE_DECL, name, t);
2938 TYPE_NAME (TREE_TYPE (d)) = d;
2939 TYPE_STUB_DECL (TREE_TYPE (d)) = d;
2940 DECL_CONTEXT (d) = FROB_CONTEXT (context);
2941 DECL_ARTIFICIAL (d) = 1;
2942 DECL_TEMPLATE_PARMS (d) = parm_list;
2949 /* Push the declarations of builtin types into the namespace.
2950 RID_INDEX is the index of the builtin type in the array
2951 RID_POINTERS. NAME is the name used when looking up the builtin
2952 type. TYPE is the _TYPE node for the builtin type. */
2955 record_builtin_type (enum rid rid_index,
2959 tree rname = NULL_TREE, tname = NULL_TREE;
2960 tree tdecl = NULL_TREE;
2962 if ((int) rid_index < (int) RID_MAX)
2963 rname = ridpointers[(int) rid_index];
2965 tname = get_identifier (name);
2967 /* The calls to SET_IDENTIFIER_GLOBAL_VALUE below should be
2968 eliminated. Built-in types should not be looked up name; their
2969 names are keywords that the parser can recognize. However, there
2970 is code in c-common.c that uses identifier_global_value to look
2971 up built-in types by name. */
2974 tdecl = build_decl (TYPE_DECL, tname, type);
2975 DECL_ARTIFICIAL (tdecl) = 1;
2976 SET_IDENTIFIER_GLOBAL_VALUE (tname, tdecl);
2982 tdecl = build_decl (TYPE_DECL, rname, type);
2983 DECL_ARTIFICIAL (tdecl) = 1;
2985 SET_IDENTIFIER_GLOBAL_VALUE (rname, tdecl);
2988 if (!TYPE_NAME (type))
2989 TYPE_NAME (type) = tdecl;
2992 debug_hooks->type_decl (tdecl, 0);
2995 /* Record one of the standard Java types.
2996 * Declare it as having the given NAME.
2997 * If SIZE > 0, it is the size of one of the integral types;
2998 * otherwise it is the negative of the size of one of the other types. */
3001 record_builtin_java_type (const char* name, int size)
3005 type = make_signed_type (size);
3006 else if (size > -32)
3007 { /* "__java_char" or ""__java_boolean". */
3008 type = make_unsigned_type (-size);
3009 /*if (size == -1) TREE_SET_CODE (type, BOOLEAN_TYPE);*/
3012 { /* "__java_float" or ""__java_double". */
3013 type = make_node (REAL_TYPE);
3014 TYPE_PRECISION (type) = - size;
3017 record_builtin_type (RID_MAX, name, type);
3018 decl = TYPE_NAME (type);
3020 /* Suppress generate debug symbol entries for these types,
3021 since for normal C++ they are just clutter.
3022 However, push_lang_context undoes this if extern "Java" is seen. */
3023 DECL_IGNORED_P (decl) = 1;
3025 TYPE_FOR_JAVA (type) = 1;
3029 /* Push a type into the namespace so that the back-ends ignore it. */
3032 record_unknown_type (tree type, const char* name)
3034 tree decl = pushdecl (build_decl (TYPE_DECL, get_identifier (name), type));
3035 /* Make sure the "unknown type" typedecl gets ignored for debug info. */
3036 DECL_IGNORED_P (decl) = 1;
3037 TYPE_DECL_SUPPRESS_DEBUG (decl) = 1;
3038 TYPE_SIZE (type) = TYPE_SIZE (void_type_node);
3039 TYPE_ALIGN (type) = 1;
3040 TYPE_USER_ALIGN (type) = 0;
3041 TYPE_MODE (type) = TYPE_MODE (void_type_node);
3044 /* A string for which we should create an IDENTIFIER_NODE at
3047 typedef struct predefined_identifier
3049 /* The name of the identifier. */
3050 const char *const name;
3051 /* The place where the IDENTIFIER_NODE should be stored. */
3053 /* Nonzero if this is the name of a constructor or destructor. */
3054 const int ctor_or_dtor_p;
3055 } predefined_identifier;
3057 /* Create all the predefined identifiers. */
3060 initialize_predefined_identifiers (void)
3062 const predefined_identifier *pid;
3064 /* A table of identifiers to create at startup. */
3065 static const predefined_identifier predefined_identifiers[] = {
3066 { "C++", &lang_name_cplusplus, 0 },
3067 { "C", &lang_name_c, 0 },
3068 { "Java", &lang_name_java, 0 },
3069 /* Some of these names have a trailing space so that it is
3070 impossible for them to conflict with names written by users. */
3071 { "__ct ", &ctor_identifier, 1 },
3072 { "__base_ctor ", &base_ctor_identifier, 1 },
3073 { "__comp_ctor ", &complete_ctor_identifier, 1 },
3074 { "__dt ", &dtor_identifier, 1 },
3075 { "__comp_dtor ", &complete_dtor_identifier, 1 },
3076 { "__base_dtor ", &base_dtor_identifier, 1 },
3077 { "__deleting_dtor ", &deleting_dtor_identifier, 1 },
3078 { IN_CHARGE_NAME, &in_charge_identifier, 0 },
3079 { "nelts", &nelts_identifier, 0 },
3080 { THIS_NAME, &this_identifier, 0 },
3081 { VTABLE_DELTA_NAME, &delta_identifier, 0 },
3082 { VTABLE_PFN_NAME, &pfn_identifier, 0 },
3083 { "_vptr", &vptr_identifier, 0 },
3084 { "__vtt_parm", &vtt_parm_identifier, 0 },
3085 { "::", &global_scope_name, 0 },
3086 { "std", &std_identifier, 0 },
3090 for (pid = predefined_identifiers; pid->name; ++pid)
3092 *pid->node = get_identifier (pid->name);
3093 if (pid->ctor_or_dtor_p)
3094 IDENTIFIER_CTOR_OR_DTOR_P (*pid->node) = 1;
3098 /* Create the predefined scalar types of C,
3099 and some nodes representing standard constants (0, 1, (void *)0).
3100 Initialize the global binding level.
3101 Make definitions for built-in primitive functions. */
3104 cxx_init_decl_processing (void)
3107 tree void_ftype_ptr;
3109 build_common_tree_nodes (flag_signed_char, false);
3111 /* Create all the identifiers we need. */
3112 initialize_predefined_identifiers ();
3114 /* Create the global variables. */
3115 push_to_top_level ();
3117 current_function_decl = NULL_TREE;
3118 current_binding_level = NULL;
3119 /* Enter the global namespace. */
3120 gcc_assert (global_namespace == NULL_TREE);
3121 global_namespace = build_lang_decl (NAMESPACE_DECL, global_scope_name,
3123 TREE_PUBLIC (global_namespace) = 1;
3124 begin_scope (sk_namespace, global_namespace);
3126 current_lang_name = NULL_TREE;
3128 /* Adjust various flags based on command-line settings. */
3129 if (!flag_permissive)
3130 flag_pedantic_errors = 1;
3131 if (!flag_no_inline)
3133 flag_inline_trees = 1;
3136 if (flag_inline_functions)
3137 flag_inline_trees = 2;
3139 /* Force minimum function alignment if using the least significant
3140 bit of function pointers to store the virtual bit. */
3141 if (TARGET_PTRMEMFUNC_VBIT_LOCATION == ptrmemfunc_vbit_in_pfn
3142 && force_align_functions_log < 1)
3143 force_align_functions_log = 1;
3146 current_lang_name = lang_name_c;
3148 /* Create the `std' namespace. */
3149 push_namespace (std_identifier);
3150 std_node = current_namespace;
3153 c_common_nodes_and_builtins ();
3155 java_byte_type_node = record_builtin_java_type ("__java_byte", 8);
3156 java_short_type_node = record_builtin_java_type ("__java_short", 16);
3157 java_int_type_node = record_builtin_java_type ("__java_int", 32);
3158 java_long_type_node = record_builtin_java_type ("__java_long", 64);
3159 java_float_type_node = record_builtin_java_type ("__java_float", -32);
3160 java_double_type_node = record_builtin_java_type ("__java_double", -64);
3161 java_char_type_node = record_builtin_java_type ("__java_char", -16);
3162 java_boolean_type_node = record_builtin_java_type ("__java_boolean", -1);
3164 integer_two_node = build_int_cst (NULL_TREE, 2);
3165 integer_three_node = build_int_cst (NULL_TREE, 3);
3167 record_builtin_type (RID_BOOL, "bool", boolean_type_node);
3168 truthvalue_type_node = boolean_type_node;
3169 truthvalue_false_node = boolean_false_node;
3170 truthvalue_true_node = boolean_true_node;
3172 empty_except_spec = build_tree_list (NULL_TREE, NULL_TREE);
3175 record_builtin_type (RID_MAX, NULL, string_type_node);
3178 delta_type_node = ptrdiff_type_node;
3179 vtable_index_type = ptrdiff_type_node;
3181 vtt_parm_type = build_pointer_type (const_ptr_type_node);
3182 void_ftype = build_function_type (void_type_node, void_list_node);
3183 void_ftype_ptr = build_function_type (void_type_node,
3184 tree_cons (NULL_TREE,
3188 = build_exception_variant (void_ftype_ptr, empty_except_spec);
3190 /* C++ extensions */
3192 unknown_type_node = make_node (UNKNOWN_TYPE);
3193 record_unknown_type (unknown_type_node, "unknown type");
3195 /* Indirecting an UNKNOWN_TYPE node yields an UNKNOWN_TYPE node. */
3196 TREE_TYPE (unknown_type_node) = unknown_type_node;
3198 /* Looking up TYPE_POINTER_TO and TYPE_REFERENCE_TO yield the same
3200 TYPE_POINTER_TO (unknown_type_node) = unknown_type_node;
3201 TYPE_REFERENCE_TO (unknown_type_node) = unknown_type_node;
3204 /* Make sure we get a unique function type, so we can give
3205 its pointer type a name. (This wins for gdb.) */
3206 tree vfunc_type = make_node (FUNCTION_TYPE);
3207 TREE_TYPE (vfunc_type) = integer_type_node;
3208 TYPE_ARG_TYPES (vfunc_type) = NULL_TREE;
3209 layout_type (vfunc_type);
3211 vtable_entry_type = build_pointer_type (vfunc_type);
3213 record_builtin_type (RID_MAX, VTBL_PTR_TYPE, vtable_entry_type);
3216 = build_cplus_array_type (vtable_entry_type, NULL_TREE);
3217 layout_type (vtbl_type_node);
3218 vtbl_type_node = build_qualified_type (vtbl_type_node, TYPE_QUAL_CONST);
3219 record_builtin_type (RID_MAX, NULL, vtbl_type_node);
3220 vtbl_ptr_type_node = build_pointer_type (vtable_entry_type);
3221 layout_type (vtbl_ptr_type_node);
3222 record_builtin_type (RID_MAX, NULL, vtbl_ptr_type_node);
3224 push_namespace (get_identifier ("__cxxabiv1"));
3225 abi_node = current_namespace;
3228 global_type_node = make_node (LANG_TYPE);
3229 record_unknown_type (global_type_node, "global type");
3232 current_lang_name = lang_name_cplusplus;
3236 tree bad_alloc_type_node;
3237 tree bad_alloc_decl;
3238 tree newtype, deltype;
3239 tree ptr_ftype_sizetype;
3241 push_namespace (std_identifier);
3242 bad_alloc_id = get_identifier ("bad_alloc");
3243 bad_alloc_type_node = make_aggr_type (RECORD_TYPE);
3244 TYPE_CONTEXT (bad_alloc_type_node) = current_namespace;
3246 = create_implicit_typedef (bad_alloc_id, bad_alloc_type_node);
3247 DECL_CONTEXT (bad_alloc_decl) = current_namespace;
3248 TYPE_STUB_DECL (bad_alloc_type_node) = bad_alloc_decl;
3252 = build_function_type (ptr_type_node,
3253 tree_cons (NULL_TREE,
3256 newtype = build_exception_variant
3257 (ptr_ftype_sizetype, add_exception_specifier
3258 (NULL_TREE, bad_alloc_type_node, -1));
3259 deltype = build_exception_variant (void_ftype_ptr, empty_except_spec);
3260 push_cp_library_fn (NEW_EXPR, newtype);
3261 push_cp_library_fn (VEC_NEW_EXPR, newtype);
3262 global_delete_fndecl = push_cp_library_fn (DELETE_EXPR, deltype);
3263 push_cp_library_fn (VEC_DELETE_EXPR, deltype);
3267 = build_library_fn_ptr ("__cxa_pure_virtual", void_ftype);
3269 /* Perform other language dependent initializations. */
3270 init_class_processing ();
3271 init_rtti_processing ();
3273 if (flag_exceptions)
3274 init_exception_processing ();
3276 if (! supports_one_only ())
3279 make_fname_decl = cp_make_fname_decl;
3280 start_fname_decls ();
3282 /* Show we use EH for cleanups. */
3283 if (flag_exceptions)
3284 using_eh_for_cleanups ();
3287 /* Generate an initializer for a function naming variable from
3288 NAME. NAME may be NULL, to indicate a dependent name. TYPE_P is
3289 filled in with the type of the init. */
3292 cp_fname_init (const char* name, tree *type_p)
3294 tree domain = NULL_TREE;
3296 tree init = NULL_TREE;
3301 length = strlen (name);
3302 domain = build_index_type (size_int (length));
3303 init = build_string (length + 1, name);
3306 type = build_qualified_type (char_type_node, TYPE_QUAL_CONST);
3307 type = build_cplus_array_type (type, domain);
3312 TREE_TYPE (init) = type;
3314 init = error_mark_node;
3319 /* Create the VAR_DECL for __FUNCTION__ etc. ID is the name to give the
3320 decl, NAME is the initialization string and TYPE_DEP indicates whether
3321 NAME depended on the type of the function. We make use of that to detect
3322 __PRETTY_FUNCTION__ inside a template fn. This is being done
3323 lazily at the point of first use, so we mustn't push the decl now. */
3326 cp_make_fname_decl (tree id, int type_dep)
3328 const char *const name = (type_dep && processing_template_decl
3329 ? NULL : fname_as_string (type_dep));
3331 tree init = cp_fname_init (name, &type);
3332 tree decl = build_decl (VAR_DECL, id, type);
3335 free ((char *) name);
3337 /* As we're using pushdecl_with_scope, we must set the context. */
3338 DECL_CONTEXT (decl) = current_function_decl;
3339 DECL_PRETTY_FUNCTION_P (decl) = type_dep;
3341 TREE_STATIC (decl) = 1;
3342 TREE_READONLY (decl) = 1;
3343 DECL_ARTIFICIAL (decl) = 1;
3345 TREE_USED (decl) = 1;
3347 if (current_function_decl)
3349 struct cp_binding_level *b = current_binding_level;
3350 while (b->level_chain->kind != sk_function_parms)
3352 pushdecl_with_scope (decl, b, /*is_friend=*/false);
3353 cp_finish_decl (decl, init, /*init_const_expr_p=*/false, NULL_TREE,
3354 LOOKUP_ONLYCONVERTING);
3357 pushdecl_top_level_and_finish (decl, init);
3362 /* Make a definition for a builtin function named NAME in the current
3363 namespace, whose data type is TYPE and whose context is CONTEXT.
3364 TYPE should be a function type with argument types.
3366 CLASS and CODE tell later passes how to compile calls to this function.
3367 See tree.h for possible values.
3369 If LIBNAME is nonzero, use that for DECL_ASSEMBLER_NAME,
3370 the name to be called if we can't opencode the function.
3371 If ATTRS is nonzero, use that for the function's attribute
3375 builtin_function_1 (const char* name,
3378 enum built_in_function code,
3379 enum built_in_class class,
3380 const char* libname,
3383 tree decl = build_library_fn_1 (get_identifier (name), ERROR_MARK, type);
3384 DECL_BUILT_IN_CLASS (decl) = class;
3385 DECL_FUNCTION_CODE (decl) = code;
3386 DECL_CONTEXT (decl) = context;
3390 /* Since `pushdecl' relies on DECL_ASSEMBLER_NAME instead of DECL_NAME,
3391 we cannot change DECL_ASSEMBLER_NAME until we have installed this
3392 function in the namespace. */
3394 SET_DECL_ASSEMBLER_NAME (decl, get_identifier (libname));
3396 /* A function in the user's namespace should have an explicit
3397 declaration before it is used. Mark the built-in function as
3398 anticipated but not actually declared. */
3399 if (name[0] != '_' || name[1] != '_')
3400 DECL_ANTICIPATED (decl) = 1;
3402 /* Possibly apply some default attributes to this built-in function. */
3404 decl_attributes (&decl, attrs, ATTR_FLAG_BUILT_IN);
3406 decl_attributes (&decl, NULL_TREE, 0);
3411 /* Entry point for the benefit of c_common_nodes_and_builtins.
3413 Make a definition for a builtin function named NAME and whose data type
3414 is TYPE. TYPE should be a function type with argument types. This
3415 function places the anticipated declaration in the global namespace
3416 and additionally in the std namespace if appropriate.
3418 CLASS and CODE tell later passes how to compile calls to this function.
3419 See tree.h for possible values.
3421 If LIBNAME is nonzero, use that for DECL_ASSEMBLER_NAME,
3422 the name to be called if we can't opencode the function.
3424 If ATTRS is nonzero, use that for the function's attribute
3428 builtin_function (const char* name,
3431 enum built_in_class cl,
3432 const char* libname,
3435 /* All builtins that don't begin with an '_' should additionally
3436 go in the 'std' namespace. */
3439 push_namespace (std_identifier);
3440 builtin_function_1 (name, type, std_node, code, cl, libname, attrs);
3444 return builtin_function_1 (name, type, NULL_TREE, code,
3445 cl, libname, attrs);
3448 /* Generate a FUNCTION_DECL with the typical flags for a runtime library
3449 function. Not called directly. */
3452 build_library_fn_1 (tree name, enum tree_code operator_code, tree type)
3454 tree fn = build_lang_decl (FUNCTION_DECL, name, type);
3455 DECL_EXTERNAL (fn) = 1;
3456 TREE_PUBLIC (fn) = 1;
3457 DECL_ARTIFICIAL (fn) = 1;
3458 SET_OVERLOADED_OPERATOR_CODE (fn, operator_code);
3459 SET_DECL_LANGUAGE (fn, lang_c);
3460 /* Runtime library routines are, by definition, available in an
3461 external shared object. */
3462 DECL_VISIBILITY (fn) = VISIBILITY_DEFAULT;
3463 DECL_VISIBILITY_SPECIFIED (fn) = 1;
3467 /* Returns the _DECL for a library function with C linkage.
3468 We assume that such functions never throw; if this is incorrect,
3469 callers should unset TREE_NOTHROW. */
3472 build_library_fn (tree name, tree type)
3474 tree fn = build_library_fn_1 (name, ERROR_MARK, type);
3475 TREE_NOTHROW (fn) = 1;
3479 /* Returns the _DECL for a library function with C++ linkage. */
3482 build_cp_library_fn (tree name, enum tree_code operator_code, tree type)
3484 tree fn = build_library_fn_1 (name, operator_code, type);
3485 TREE_NOTHROW (fn) = TYPE_NOTHROW_P (type);
3486 DECL_CONTEXT (fn) = FROB_CONTEXT (current_namespace);
3487 SET_DECL_LANGUAGE (fn, lang_cplusplus);
3491 /* Like build_library_fn, but takes a C string instead of an
3495 build_library_fn_ptr (const char* name, tree type)
3497 return build_library_fn (get_identifier (name), type);
3500 /* Like build_cp_library_fn, but takes a C string instead of an
3504 build_cp_library_fn_ptr (const char* name, tree type)
3506 return build_cp_library_fn (get_identifier (name), ERROR_MARK, type);
3509 /* Like build_library_fn, but also pushes the function so that we will
3510 be able to find it via IDENTIFIER_GLOBAL_VALUE. */
3513 push_library_fn (tree name, tree type)
3515 tree fn = build_library_fn (name, type);
3516 pushdecl_top_level (fn);
3520 /* Like build_cp_library_fn, but also pushes the function so that it
3521 will be found by normal lookup. */
3524 push_cp_library_fn (enum tree_code operator_code, tree type)
3526 tree fn = build_cp_library_fn (ansi_opname (operator_code),
3533 /* Like push_library_fn, but takes a TREE_LIST of parm types rather than
3537 push_void_library_fn (tree name, tree parmtypes)
3539 tree type = build_function_type (void_type_node, parmtypes);
3540 return push_library_fn (name, type);
3543 /* Like push_library_fn, but also note that this function throws
3544 and does not return. Used for __throw_foo and the like. */
3547 push_throw_library_fn (tree name, tree type)
3549 tree fn = push_library_fn (name, type);
3550 TREE_THIS_VOLATILE (fn) = 1;
3551 TREE_NOTHROW (fn) = 0;
3555 /* When we call finish_struct for an anonymous union, we create
3556 default copy constructors and such. But, an anonymous union
3557 shouldn't have such things; this function undoes the damage to the
3558 anonymous union type T.
3560 (The reason that we create the synthesized methods is that we don't
3561 distinguish `union { int i; }' from `typedef union { int i; } U'.
3562 The first is an anonymous union; the second is just an ordinary
3566 fixup_anonymous_aggr (tree t)
3570 /* Wipe out memory of synthesized methods. */
3571 TYPE_HAS_CONSTRUCTOR (t) = 0;
3572 TYPE_HAS_DEFAULT_CONSTRUCTOR (t) = 0;
3573 TYPE_HAS_INIT_REF (t) = 0;
3574 TYPE_HAS_CONST_INIT_REF (t) = 0;
3575 TYPE_HAS_ASSIGN_REF (t) = 0;
3576 TYPE_HAS_CONST_ASSIGN_REF (t) = 0;
3578 /* Splice the implicitly generated functions out of the TYPE_METHODS
3580 q = &TYPE_METHODS (t);
3583 if (DECL_ARTIFICIAL (*q))
3584 *q = TREE_CHAIN (*q);
3586 q = &TREE_CHAIN (*q);
3589 /* ISO C++ 9.5.3. Anonymous unions may not have function members. */
3590 if (TYPE_METHODS (t))
3591 error ("%Jan anonymous union cannot have function members",
3592 TYPE_MAIN_DECL (t));
3594 /* Anonymous aggregates cannot have fields with ctors, dtors or complex
3595 assignment operators (because they cannot have these methods themselves).
3596 For anonymous unions this is already checked because they are not allowed
3597 in any union, otherwise we have to check it. */
3598 if (TREE_CODE (t) != UNION_TYPE)
3602 for (field = TYPE_FIELDS (t); field; field = TREE_CHAIN (field))
3603 if (TREE_CODE (field) == FIELD_DECL)
3605 type = TREE_TYPE (field);
3606 if (CLASS_TYPE_P (type))
3608 if (TYPE_NEEDS_CONSTRUCTING (type))
3609 error ("member %q+#D with constructor not allowed "
3610 "in anonymous aggregate", field);
3611 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type))
3612 error ("member %q+#D with destructor not allowed "
3613 "in anonymous aggregate", field);
3614 if (TYPE_HAS_COMPLEX_ASSIGN_REF (type))
3615 error ("member %q+#D with copy assignment operator "
3616 "not allowed in anonymous aggregate", field);
3622 /* Make sure that a declaration with no declarator is well-formed, i.e.
3623 just declares a tagged type or anonymous union.
3625 Returns the type declared; or NULL_TREE if none. */
3628 check_tag_decl (cp_decl_specifier_seq *declspecs)
3630 int saw_friend = declspecs->specs[(int)ds_friend] != 0;
3631 int saw_typedef = declspecs->specs[(int)ds_typedef] != 0;
3632 /* If a class, struct, or enum type is declared by the DECLSPECS
3633 (i.e, if a class-specifier, enum-specifier, or non-typename
3634 elaborated-type-specifier appears in the DECLSPECS),
3635 DECLARED_TYPE is set to the corresponding type. */
3636 tree declared_type = NULL_TREE;
3637 bool error_p = false;
3639 if (declspecs->multiple_types_p)
3640 error ("multiple types in one declaration");
3641 else if (declspecs->redefined_builtin_type)
3643 if (!in_system_header)
3644 pedwarn ("redeclaration of C++ built-in type %qT",
3645 declspecs->redefined_builtin_type);
3650 && TYPE_P (declspecs->type)
3651 && ((TREE_CODE (declspecs->type) != TYPENAME_TYPE
3652 && IS_AGGR_TYPE (declspecs->type))
3653 || TREE_CODE (declspecs->type) == ENUMERAL_TYPE))
3654 declared_type = declspecs->type;
3655 else if (declspecs->type == error_mark_node)
3657 if (declared_type == NULL_TREE && ! saw_friend && !error_p)
3658 pedwarn ("declaration does not declare anything");
3659 /* Check for an anonymous union. */
3660 else if (declared_type && IS_AGGR_TYPE_CODE (TREE_CODE (declared_type))
3661 && TYPE_ANONYMOUS_P (declared_type))
3663 /* 7/3 In a simple-declaration, the optional init-declarator-list
3664 can be omitted only when declaring a class (clause 9) or
3665 enumeration (7.2), that is, when the decl-specifier-seq contains
3666 either a class-specifier, an elaborated-type-specifier with
3667 a class-key (9.1), or an enum-specifier. In these cases and
3668 whenever a class-specifier or enum-specifier is present in the
3669 decl-specifier-seq, the identifiers in these specifiers are among
3670 the names being declared by the declaration (as class-name,
3671 enum-names, or enumerators, depending on the syntax). In such
3672 cases, and except for the declaration of an unnamed bit-field (9.6),
3673 the decl-specifier-seq shall introduce one or more names into the
3674 program, or shall redeclare a name introduced by a previous
3675 declaration. [Example:
3676 enum { }; // ill-formed
3677 typedef class { }; // ill-formed
3681 error ("missing type-name in typedef-declaration");
3684 /* Anonymous unions are objects, so they can have specifiers. */;
3685 SET_ANON_AGGR_TYPE_P (declared_type);
3687 if (TREE_CODE (declared_type) != UNION_TYPE && pedantic
3688 && !in_system_header)
3689 pedwarn ("ISO C++ prohibits anonymous structs");
3694 if (declspecs->specs[(int)ds_inline]
3695 || declspecs->specs[(int)ds_virtual])
3696 error ("%qs can only be specified for functions",
3697 declspecs->specs[(int)ds_inline]
3698 ? "inline" : "virtual");
3700 && (!current_class_type
3701 || current_scope () != current_class_type))
3702 error ("%<friend%> can only be specified inside a class");
3703 else if (declspecs->specs[(int)ds_explicit])
3704 error ("%<explicit%> can only be specified for constructors");
3705 else if (declspecs->storage_class)
3706 error ("a storage class can only be specified for objects "
3708 else if (declspecs->specs[(int)ds_const]
3709 || declspecs->specs[(int)ds_volatile]
3710 || declspecs->specs[(int)ds_restrict]
3711 || declspecs->specs[(int)ds_thread])
3712 error ("qualifiers can only be specified for objects "
3716 return declared_type;
3719 /* Called when a declaration is seen that contains no names to declare.
3720 If its type is a reference to a structure, union or enum inherited
3721 from a containing scope, shadow that tag name for the current scope
3722 with a forward reference.
3723 If its type defines a new named structure or union
3724 or defines an enum, it is valid but we need not do anything here.
3725 Otherwise, it is an error.
3727 C++: may have to grok the declspecs to learn about static,
3728 complain for anonymous unions.
3730 Returns the TYPE declared -- or NULL_TREE if none. */
3733 shadow_tag (cp_decl_specifier_seq *declspecs)
3735 tree t = check_tag_decl (declspecs);
3740 if (declspecs->attributes)
3742 warning (0, "attribute ignored in declaration of %q+#T", t);
3743 warning (0, "attribute for %q+#T must follow the %qs keyword",
3744 t, class_key_or_enum_as_string (t));
3748 if (maybe_process_partial_specialization (t) == error_mark_node)
3751 /* This is where the variables in an anonymous union are
3752 declared. An anonymous union declaration looks like:
3754 because there is no declarator after the union, the parser
3755 sends that declaration here. */
3756 if (ANON_AGGR_TYPE_P (t))
3758 fixup_anonymous_aggr (t);
3760 if (TYPE_FIELDS (t))
3762 tree decl = grokdeclarator (/*declarator=*/NULL,
3763 declspecs, NORMAL, 0, NULL);
3764 finish_anon_union (decl);
3771 /* Decode a "typename", such as "int **", returning a ..._TYPE node. */
3774 groktypename (cp_decl_specifier_seq *type_specifiers,
3775 const cp_declarator *declarator)
3779 attrs = type_specifiers->attributes;
3780 type_specifiers->attributes = NULL_TREE;
3781 type = grokdeclarator (declarator, type_specifiers, TYPENAME, 0, &attrs);
3783 cplus_decl_attributes (&type, attrs, 0);
3787 /* Decode a declarator in an ordinary declaration or data definition.
3788 This is called as soon as the type information and variable name
3789 have been parsed, before parsing the initializer if any.
3790 Here we create the ..._DECL node, fill in its type,
3791 and put it on the list of decls for the current context.
3792 The ..._DECL node is returned as the value.
3794 Exception: for arrays where the length is not specified,
3795 the type is left null, to be filled in by `cp_finish_decl'.
3797 Function definitions do not come here; they go to start_function
3798 instead. However, external and forward declarations of functions
3799 do go through here. Structure field declarations are done by
3800 grokfield and not through here. */
3803 start_decl (const cp_declarator *declarator,
3804 cp_decl_specifier_seq *declspecs,
3807 tree prefix_attributes,
3808 tree *pushed_scope_p)
3814 *pushed_scope_p = NULL_TREE;
3816 /* An object declared as __attribute__((deprecated)) suppresses
3817 warnings of uses of other deprecated items. */
3818 if (lookup_attribute ("deprecated", attributes))
3819 deprecated_state = DEPRECATED_SUPPRESS;
3821 attributes = chainon (attributes, prefix_attributes);
3823 decl = grokdeclarator (declarator, declspecs, NORMAL, initialized,
3826 deprecated_state = DEPRECATED_NORMAL;
3828 if (decl == NULL_TREE || TREE_CODE (decl) == VOID_TYPE
3829 || decl == error_mark_node)
3830 return error_mark_node;
3832 type = TREE_TYPE (decl);
3834 context = DECL_CONTEXT (decl);
3838 *pushed_scope_p = push_scope (context);
3840 /* We are only interested in class contexts, later. */
3841 if (TREE_CODE (context) == NAMESPACE_DECL)
3842 context = NULL_TREE;
3846 /* Is it valid for this decl to have an initializer at all?
3847 If not, set INITIALIZED to zero, which will indirectly
3848 tell `cp_finish_decl' to ignore the initializer once it is parsed. */
3849 switch (TREE_CODE (decl))
3852 error ("typedef %qD is initialized (use __typeof__ instead)", decl);
3853 return error_mark_node;
3856 error ("function %q#D is initialized like a variable", decl);
3857 return error_mark_node;
3865 if (! toplevel_bindings_p ()
3866 && DECL_EXTERNAL (decl))
3867 warning (0, "declaration of %q#D has %<extern%> and is initialized",
3869 DECL_EXTERNAL (decl) = 0;
3870 if (toplevel_bindings_p ())
3871 TREE_STATIC (decl) = 1;
3874 /* Set attributes here so if duplicate decl, will have proper attributes. */
3875 cplus_decl_attributes (&decl, attributes, 0);
3877 /* Dllimported symbols cannot be defined. Static data members (which
3878 can be initialized in-class and dllimported) go through grokfield,
3879 not here, so we don't need to exclude those decls when checking for
3881 if (initialized && DECL_DLLIMPORT_P (decl))
3883 error ("definition of %q#D is marked %<dllimport%>", decl);
3884 DECL_DLLIMPORT_P (decl) = 0;
3887 /* If #pragma weak was used, mark the decl weak now. */
3888 maybe_apply_pragma_weak (decl);
3890 if (TREE_CODE (decl) == FUNCTION_DECL
3891 && DECL_DECLARED_INLINE_P (decl)
3892 && DECL_UNINLINABLE (decl)
3893 && lookup_attribute ("noinline", DECL_ATTRIBUTES (decl)))
3894 warning (0, "inline function %q+D given attribute noinline", decl);
3896 if (context && COMPLETE_TYPE_P (complete_type (context)))
3898 if (TREE_CODE (decl) == VAR_DECL)
3900 tree field = lookup_field (context, DECL_NAME (decl), 0, false);
3901 if (field == NULL_TREE || TREE_CODE (field) != VAR_DECL)
3902 error ("%q#D is not a static member of %q#T", decl, context);
3905 if (DECL_CONTEXT (field) != context)
3907 if (!same_type_p (DECL_CONTEXT (field), context))
3908 pedwarn ("ISO C++ does not permit %<%T::%D%> "
3909 "to be defined as %<%T::%D%>",
3910 DECL_CONTEXT (field), DECL_NAME (decl),
3911 context, DECL_NAME (decl));
3912 DECL_CONTEXT (decl) = DECL_CONTEXT (field);
3914 if (processing_specialization
3915 && template_class_depth (context) == 0
3916 && CLASSTYPE_TEMPLATE_SPECIALIZATION (context))
3917 error ("template header not allowed in member definition "
3918 "of explicitly specialized class");
3919 /* Static data member are tricky; an in-class initialization
3920 still doesn't provide a definition, so the in-class
3921 declaration will have DECL_EXTERNAL set, but will have an
3922 initialization. Thus, duplicate_decls won't warn
3923 about this situation, and so we check here. */
3924 if (initialized && DECL_INITIALIZED_IN_CLASS_P (field))
3925 error ("duplicate initialization of %qD", decl);
3926 if (duplicate_decls (decl, field, /*newdecl_is_friend=*/false))
3932 tree field = check_classfn (context, decl,
3933 (processing_template_decl
3934 > template_class_depth (context))
3935 ? current_template_parms
3937 if (field && duplicate_decls (decl, field,
3938 /*newdecl_is_friend=*/false))
3942 /* cp_finish_decl sets DECL_EXTERNAL if DECL_IN_AGGR_P is set. */
3943 DECL_IN_AGGR_P (decl) = 0;
3944 /* Do not mark DECL as an explicit specialization if it was not
3945 already marked as an instantiation; a declaration should
3946 never be marked as a specialization unless we know what
3947 template is being specialized. */
3948 if (DECL_LANG_SPECIFIC (decl) && DECL_USE_TEMPLATE (decl))
3950 SET_DECL_TEMPLATE_SPECIALIZATION (decl);
3952 /* [temp.expl.spec] An explicit specialization of a static data
3953 member of a template is a definition if the declaration
3954 includes an initializer; otherwise, it is a declaration.
3956 We check for processing_specialization so this only applies
3957 to the new specialization syntax. */
3958 if (!initialized && processing_specialization)
3959 DECL_EXTERNAL (decl) = 1;
3962 if (DECL_EXTERNAL (decl) && ! DECL_TEMPLATE_SPECIALIZATION (decl))
3963 pedwarn ("declaration of %q#D outside of class is not definition",
3967 /* Enter this declaration into the symbol table. */
3968 tem = maybe_push_decl (decl);
3970 if (processing_template_decl)
3971 tem = push_template_decl (tem);
3972 if (tem == error_mark_node)
3973 return error_mark_node;
3975 /* Tell the back-end to use or not use .common as appropriate. If we say
3976 -fconserve-space, we want this to save .data space, at the expense of
3977 wrong semantics. If we say -fno-conserve-space, we want this to
3978 produce errors about redefs; to do this we force variables into the
3980 if (flag_conserve_space
3981 && TREE_CODE (tem) == VAR_DECL
3982 && TREE_PUBLIC (tem)
3983 && !DECL_THREAD_LOCAL_P (tem)
3984 && !have_global_bss_p ())
3985 DECL_COMMON (tem) = 1;
3987 if (!processing_template_decl && TREE_CODE (tem) == VAR_DECL)
3988 start_decl_1 (tem, initialized);
3994 start_decl_1 (tree decl, bool initialized)
3998 gcc_assert (!processing_template_decl);
4000 if (error_operand_p (decl))
4003 gcc_assert (TREE_CODE (decl) == VAR_DECL);
4004 type = TREE_TYPE (decl);
4007 /* Is it valid for this decl to have an initializer at all?
4008 If not, set INITIALIZED to zero, which will indirectly
4009 tell `cp_finish_decl' to ignore the initializer once it is parsed. */
4011 /* Don't allow initializations for incomplete types except for
4012 arrays which might be completed by the initialization. */
4013 if (COMPLETE_TYPE_P (complete_type (type)))
4014 ; /* A complete type is ok. */
4015 else if (TREE_CODE (type) != ARRAY_TYPE)
4017 error ("variable %q#D has initializer but incomplete type", decl);
4019 type = TREE_TYPE (decl) = error_mark_node;
4021 else if (!COMPLETE_TYPE_P (complete_type (TREE_TYPE (type))))
4023 if (DECL_LANG_SPECIFIC (decl) && DECL_TEMPLATE_INFO (decl))
4024 error ("elements of array %q#D have incomplete type", decl);
4025 /* else we already gave an error in start_decl. */
4029 else if (IS_AGGR_TYPE (type)
4030 && ! DECL_EXTERNAL (decl))
4032 if (!COMPLETE_TYPE_P (complete_type (type)))
4034 error ("aggregate %q#D has incomplete type and cannot be defined",
4036 /* Change the type so that assemble_variable will give
4037 DECL an rtl we can live with: (mem (const_int 0)). */
4038 type = TREE_TYPE (decl) = error_mark_node;
4042 /* If any base type in the hierarchy of TYPE needs a constructor,
4043 then we set initialized to 1. This way any nodes which are
4044 created for the purposes of initializing this aggregate
4045 will live as long as it does. This is necessary for global
4046 aggregates which do not have their initializers processed until
4047 the end of the file. */
4048 initialized = TYPE_NEEDS_CONSTRUCTING (type);
4052 /* Create a new scope to hold this declaration if necessary.
4053 Whether or not a new scope is necessary cannot be determined
4054 until after the type has been completed; if the type is a
4055 specialization of a class template it is not until after
4056 instantiation has occurred that TYPE_HAS_NONTRIVIAL_DESTRUCTOR
4057 will be set correctly. */
4058 maybe_push_cleanup_level (type);
4061 /* Handle initialization of references. DECL, TYPE, and INIT have the
4062 same meaning as in cp_finish_decl. *CLEANUP must be NULL on entry,
4063 but will be set to a new CLEANUP_STMT if a temporary is created
4064 that must be destroyed subsequently.
4066 Returns an initializer expression to use to initialize DECL, or
4067 NULL if the initialization can be performed statically.
4069 Quotes on semantics can be found in ARM 8.4.3. */
4072 grok_reference_init (tree decl, tree type, tree init, tree *cleanup)
4076 if (init == NULL_TREE)
4078 if ((DECL_LANG_SPECIFIC (decl) == 0
4079 || DECL_IN_AGGR_P (decl) == 0)
4080 && ! DECL_THIS_EXTERN (decl))
4081 error ("%qD declared as reference but not initialized", decl);
4085 if (TREE_CODE (init) == CONSTRUCTOR)
4087 error ("ISO C++ forbids use of initializer list to "
4088 "initialize reference %qD", decl);
4092 if (TREE_CODE (init) == TREE_LIST)
4093 init = build_x_compound_expr_from_list (init, "initializer");
4095 if (TREE_CODE (TREE_TYPE (type)) != ARRAY_TYPE
4096 && TREE_CODE (TREE_TYPE (init)) == ARRAY_TYPE)
4097 /* Note: default conversion is only called in very special cases. */
4098 init = decay_conversion (init);
4100 /* Convert INIT to the reference type TYPE. This may involve the
4101 creation of a temporary, whose lifetime must be the same as that
4102 of the reference. If so, a DECL_EXPR for the temporary will be
4103 added just after the DECL_EXPR for DECL. That's why we don't set
4104 DECL_INITIAL for local references (instead assigning to them
4105 explicitly); we need to allow the temporary to be initialized
4107 tmp = initialize_reference (type, init, decl, cleanup);
4109 if (tmp == error_mark_node)
4111 else if (tmp == NULL_TREE)
4113 error ("cannot initialize %qT from %qT", type, TREE_TYPE (init));
4117 if (TREE_STATIC (decl) && !TREE_CONSTANT (tmp))
4120 DECL_INITIAL (decl) = tmp;
4125 /* When parsing `int a[] = {1, 2};' we don't know the size of the
4126 array until we finish parsing the initializer. If that's the
4127 situation we're in, update DECL accordingly. */
4130 maybe_deduce_size_from_array_init (tree decl, tree init)
4132 tree type = TREE_TYPE (decl);
4134 if (TREE_CODE (type) == ARRAY_TYPE
4135 && TYPE_DOMAIN (type) == NULL_TREE
4136 && TREE_CODE (decl) != TYPE_DECL)
4138 /* do_default is really a C-ism to deal with tentative definitions.
4139 But let's leave it here to ease the eventual merge. */
4140 int do_default = !DECL_EXTERNAL (decl);
4141 tree initializer = init ? init : DECL_INITIAL (decl);
4142 int failure = cp_complete_array_type (&TREE_TYPE (decl), initializer,
4147 error ("initializer fails to determine size of %qD", decl);
4148 TREE_TYPE (decl) = error_mark_node;
4150 else if (failure == 2)
4154 error ("array size missing in %qD", decl);
4155 TREE_TYPE (decl) = error_mark_node;
4157 /* If a `static' var's size isn't known, make it extern as
4158 well as static, so it does not get allocated. If it's not
4159 `static', then don't mark it extern; finish_incomplete_decl
4160 will give it a default size and it will get allocated. */
4161 else if (!pedantic && TREE_STATIC (decl) && !TREE_PUBLIC (decl))
4162 DECL_EXTERNAL (decl) = 1;
4164 else if (failure == 3)
4166 error ("zero-size array %qD", decl);
4167 TREE_TYPE (decl) = error_mark_node;
4170 cp_apply_type_quals_to_decl (cp_type_quals (TREE_TYPE (decl)), decl);
4172 layout_decl (decl, 0);
4176 /* Set DECL_SIZE, DECL_ALIGN, etc. for DECL (a VAR_DECL), and issue
4177 any appropriate error messages regarding the layout. */
4180 layout_var_decl (tree decl)
4184 type = TREE_TYPE (decl);
4185 if (type == error_mark_node)
4188 /* If we haven't already layed out this declaration, do so now.
4189 Note that we must not call complete type for an external object
4190 because it's type might involve templates that we are not
4191 supposed to instantiate yet. (And it's perfectly valid to say
4192 `extern X x' for some incomplete type `X'.) */
4193 if (!DECL_EXTERNAL (decl))
4194 complete_type (type);
4195 if (!DECL_SIZE (decl)
4196 && TREE_TYPE (decl) != error_mark_node
4197 && (COMPLETE_TYPE_P (type)
4198 || (TREE_CODE (type) == ARRAY_TYPE
4199 && !TYPE_DOMAIN (type)
4200 && COMPLETE_TYPE_P (TREE_TYPE (type)))))
4201 layout_decl (decl, 0);
4203 if (!DECL_EXTERNAL (decl) && DECL_SIZE (decl) == NULL_TREE)
4205 /* An automatic variable with an incomplete type: that is an error.
4206 Don't talk about array types here, since we took care of that
4207 message in grokdeclarator. */
4208 error ("storage size of %qD isn't known", decl);
4209 TREE_TYPE (decl) = error_mark_node;
4212 /* Keep this code around in case we later want to control debug info
4213 based on whether a type is "used". (jason 1999-11-11) */
4215 else if (!DECL_EXTERNAL (decl) && IS_AGGR_TYPE (ttype))
4216 /* Let debugger know it should output info for this type. */
4217 note_debug_info_needed (ttype);
4219 if (TREE_STATIC (decl) && DECL_CLASS_SCOPE_P (decl))
4220 note_debug_info_needed (DECL_CONTEXT (decl));
4223 if ((DECL_EXTERNAL (decl) || TREE_STATIC (decl))
4224 && DECL_SIZE (decl) != NULL_TREE
4225 && ! TREE_CONSTANT (DECL_SIZE (decl)))
4227 if (TREE_CODE (DECL_SIZE (decl)) == INTEGER_CST)
4228 constant_expression_warning (DECL_SIZE (decl));
4230 error ("storage size of %qD isn't constant", decl);
4234 /* If a local static variable is declared in an inline function, or if
4235 we have a weak definition, we must endeavor to create only one
4236 instance of the variable at link-time. */
4239 maybe_commonize_var (tree decl)
4241 /* Static data in a function with comdat linkage also has comdat
4243 if (TREE_STATIC (decl)
4244 /* Don't mess with __FUNCTION__. */
4245 && ! DECL_ARTIFICIAL (decl)
4246 && DECL_FUNCTION_SCOPE_P (decl)
4247 /* Unfortunately, import_export_decl has not always been called
4248 before the function is processed, so we cannot simply check
4250 && (DECL_COMDAT (DECL_CONTEXT (decl))
4251 || ((DECL_DECLARED_INLINE_P (DECL_CONTEXT (decl))
4252 || DECL_TEMPLATE_INSTANTIATION (DECL_CONTEXT (decl)))
4253 && TREE_PUBLIC (DECL_CONTEXT (decl)))))
4257 /* With weak symbols, we simply make the variable COMDAT;
4258 that will cause copies in multiple translations units to
4260 comdat_linkage (decl);
4264 if (DECL_INITIAL (decl) == NULL_TREE
4265 || DECL_INITIAL (decl) == error_mark_node)
4267 /* Without weak symbols, we can use COMMON to merge
4268 uninitialized variables. */
4269 TREE_PUBLIC (decl) = 1;
4270 DECL_COMMON (decl) = 1;
4274 /* While for initialized variables, we must use internal
4275 linkage -- which means that multiple copies will not
4277 TREE_PUBLIC (decl) = 0;
4278 DECL_COMMON (decl) = 0;
4279 warning (0, "sorry: semantics of inline function static "
4280 "data %q+#D are wrong (you'll wind up "
4281 "with multiple copies)", decl);
4282 warning (0, "%J you can work around this by removing "
4288 else if (DECL_LANG_SPECIFIC (decl) && DECL_COMDAT (decl))
4289 /* Set it up again; we might have set DECL_INITIAL since the last
4291 comdat_linkage (decl);
4294 /* Issue an error message if DECL is an uninitialized const variable. */
4297 check_for_uninitialized_const_var (tree decl)
4299 tree type = TREE_TYPE (decl);
4301 /* ``Unless explicitly declared extern, a const object does not have
4302 external linkage and must be initialized. ($8.4; $12.1)'' ARM
4304 if (TREE_CODE (decl) == VAR_DECL
4305 && TREE_CODE (type) != REFERENCE_TYPE
4306 && CP_TYPE_CONST_P (type)
4307 && !TYPE_NEEDS_CONSTRUCTING (type)
4308 && !DECL_INITIAL (decl))
4309 error ("uninitialized const %qD", decl);
4313 /* Structure holding the current initializer being processed by reshape_init.
4314 CUR is a pointer to the current element being processed, END is a pointer
4315 after the last element present in the initializer. */
4316 typedef struct reshape_iterator_t
4318 constructor_elt *cur;
4319 constructor_elt *end;
4322 static tree reshape_init_r (tree, reshape_iter *, bool);
4324 /* FIELD is a FIELD_DECL or NULL. In the former case, the value
4325 returned is the next FIELD_DECL (possibly FIELD itself) that can be
4326 initialized. If there are no more such fields, the return value
4330 next_initializable_field (tree field)
4333 && (TREE_CODE (field) != FIELD_DECL
4334 || (DECL_C_BIT_FIELD (field) && !DECL_NAME (field))
4335 || DECL_ARTIFICIAL (field)))
4336 field = TREE_CHAIN (field);
4341 /* Subroutine of reshape_init_array and reshape_init_vector, which does
4342 the actual work. ELT_TYPE is the element type of the array. MAX_INDEX is an
4343 INTEGER_CST representing the size of the array minus one (the maximum index),
4344 or NULL_TREE if the array was declared without specifying the size. D is
4345 the iterator within the constructor. */
4348 reshape_init_array_1 (tree elt_type, tree max_index, reshape_iter *d)
4351 bool sized_array_p = (max_index != NULL_TREE);
4352 unsigned HOST_WIDE_INT max_index_cst = 0;
4353 unsigned HOST_WIDE_INT index;
4355 /* The initializer for an array is always a CONSTRUCTOR. */
4356 new_init = build_constructor (NULL_TREE, NULL);
4360 /* Minus 1 is used for zero sized arrays. */
4361 if (integer_all_onesp (max_index))
4364 if (host_integerp (max_index, 1))
4365 max_index_cst = tree_low_cst (max_index, 1);
4366 /* sizetype is sign extended, not zero extended. */
4368 max_index_cst = tree_low_cst (fold_convert (size_type_node, max_index),
4372 /* Loop until there are no more initializers. */
4374 d->cur != d->end && (!sized_array_p || index <= max_index_cst);
4381 /* Handle array designated initializers (GNU extension). */
4382 if (TREE_CODE (d->cur->index) == IDENTIFIER_NODE)
4384 error ("name %qD used in a GNU-style designated "
4385 "initializer for an array", d->cur->index);
4391 elt_init = reshape_init_r (elt_type, d, /*first_initializer_p=*/false);
4392 if (elt_init == error_mark_node)
4393 return error_mark_node;
4394 CONSTRUCTOR_APPEND_ELT (CONSTRUCTOR_ELTS (new_init), NULL_TREE, elt_init);
4400 /* Subroutine of reshape_init_r, processes the initializers for arrays.
4401 Parameters are the same of reshape_init_r. */
4404 reshape_init_array (tree type, reshape_iter *d)
4406 tree max_index = NULL_TREE;
4408 gcc_assert (TREE_CODE (type) == ARRAY_TYPE);
4410 if (TYPE_DOMAIN (type))
4411 max_index = array_type_nelts (type);
4413 return reshape_init_array_1 (TREE_TYPE (type), max_index, d);
4416 /* Subroutine of reshape_init_r, processes the initializers for vectors.
4417 Parameters are the same of reshape_init_r. */
4420 reshape_init_vector (tree type, reshape_iter *d)
4422 tree max_index = NULL_TREE;
4425 gcc_assert (TREE_CODE (type) == VECTOR_TYPE);
4427 if (COMPOUND_LITERAL_P (d->cur->value))
4429 tree value = d->cur->value;
4430 if (!same_type_p (TREE_TYPE (value), type))
4432 error ("invalid type %qT as initializer for a vector of type %qT",
4433 TREE_TYPE (d->cur->value), type);
4434 value = error_mark_node;
4440 /* For a vector, the representation type is a struct
4441 containing a single member which is an array of the
4442 appropriate size. */
4443 rtype = TYPE_DEBUG_REPRESENTATION_TYPE (type);
4444 if (rtype && TYPE_DOMAIN (TREE_TYPE (TYPE_FIELDS (rtype))))
4445 max_index = array_type_nelts (TREE_TYPE (TYPE_FIELDS (rtype)));
4447 return reshape_init_array_1 (TREE_TYPE (type), max_index, d);
4450 /* Subroutine of reshape_init_r, processes the initializers for classes
4451 or union. Parameters are the same of reshape_init_r. */
4454 reshape_init_class (tree type, reshape_iter *d, bool first_initializer_p)
4459 gcc_assert (CLASS_TYPE_P (type));
4461 /* The initializer for a class is always a CONSTRUCTOR. */
4462 new_init = build_constructor (NULL_TREE, NULL);
4463 field = next_initializable_field (TYPE_FIELDS (type));
4469 An initializer for an aggregate member that is an
4470 empty class shall have the form of an empty
4471 initializer-list {}. */
4472 if (!first_initializer_p)
4474 error ("initializer for %qT must be brace-enclosed", type);
4475 return error_mark_node;
4480 /* Loop through the initializable fields, gathering initializers. */
4481 while (d->cur != d->end)
4485 /* Handle designated initializers, as an extension. */
4488 field = lookup_field_1 (type, d->cur->index, /*want_type=*/false);
4490 if (!field || TREE_CODE (field) != FIELD_DECL)
4492 error ("%qT has no non-static data member named %qD", type,
4494 return error_mark_node;
4498 /* If we processed all the member of the class, we are done. */
4502 field_init = reshape_init_r (TREE_TYPE (field), d,
4503 /*first_initializer_p=*/false);
4504 CONSTRUCTOR_APPEND_ELT (CONSTRUCTOR_ELTS (new_init), field, field_init);
4508 When a union is initialized with a brace-enclosed
4509 initializer, the braces shall only contain an
4510 initializer for the first member of the union. */
4511 if (TREE_CODE (type) == UNION_TYPE)
4514 field = next_initializable_field (TREE_CHAIN (field));
4520 /* Subroutine of reshape_init, which processes a single initializer (part of
4521 a CONSTRUCTOR). TYPE is the type of the variable being initialized, D is the
4522 iterator within the CONSTRUCTOR which points to the initializer to process.
4523 FIRST_INITIALIZER_P is true if this is the first initializer of the
4524 CONSTRUCTOR node. */
4527 reshape_init_r (tree type, reshape_iter *d, bool first_initializer_p)
4529 tree init = d->cur->value;
4531 /* A non-aggregate type is always initialized with a single
4533 if (!CP_AGGREGATE_TYPE_P (type))
4535 /* It is invalid to initialize a non-aggregate type with a
4536 brace-enclosed initializer.
4537 We need to check for BRACE_ENCLOSED_INITIALIZER_P here because
4538 of g++.old-deja/g++.mike/p7626.C: a pointer-to-member constant is
4539 a CONSTRUCTOR (with a record type). */
4540 if (TREE_CODE (init) == CONSTRUCTOR
4541 && BRACE_ENCLOSED_INITIALIZER_P (init)) /* p7626.C */
4543 error ("braces around scalar initializer for type %qT", type);
4544 init = error_mark_node;
4553 All implicit type conversions (clause _conv_) are considered when
4554 initializing the aggregate member with an initializer from an
4555 initializer-list. If the initializer can initialize a member,
4556 the member is initialized. Otherwise, if the member is itself a
4557 non-empty subaggregate, brace elision is assumed and the
4558 initializer is considered for the initialization of the first
4559 member of the subaggregate. */
4560 if (TREE_CODE (init) != CONSTRUCTOR
4561 && can_convert_arg (type, TREE_TYPE (init), init, LOOKUP_NORMAL))
4567 /* [dcl.init.string]
4569 A char array (whether plain char, signed char, or unsigned char)
4570 can be initialized by a string-literal (optionally enclosed in
4571 braces); a wchar_t array can be initialized by a wide
4572 string-literal (optionally enclosed in braces). */
4573 if (TREE_CODE (type) == ARRAY_TYPE
4574 && char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (type))))
4576 tree str_init = init;
4578 /* Strip one level of braces if and only if they enclose a single
4579 element (as allowed by [dcl.init.string]). */
4580 if (!first_initializer_p
4581 && TREE_CODE (str_init) == CONSTRUCTOR
4582 && VEC_length (constructor_elt, CONSTRUCTOR_ELTS (str_init)) == 1)
4584 str_init = VEC_index (constructor_elt,
4585 CONSTRUCTOR_ELTS (str_init), 0)->value;
4588 /* If it's a string literal, then it's the initializer for the array
4589 as a whole. Otherwise, continue with normal initialization for
4590 array types (one value per array element). */
4591 if (TREE_CODE (str_init) == STRING_CST)
4598 /* The following cases are about aggregates. If we are not within a full
4599 initializer already, and there is not a CONSTRUCTOR, it means that there
4600 is a missing set of braces (that is, we are processing the case for
4601 which reshape_init exists). */
4602 if (!first_initializer_p)
4604 if (TREE_CODE (init) == CONSTRUCTOR)
4606 /* For a nested compound literal, there is no need to reshape since
4607 brace elision is not allowed. Even if we decided to allow it,
4608 we should add a call to reshape_init in finish_compound_literal,
4609 before calling digest_init, so changing this code would still
4610 not be necessary. */
4611 if (!COMPOUND_LITERAL_P (init))
4614 gcc_assert (BRACE_ENCLOSED_INITIALIZER_P (init));
4615 return reshape_init (type, init);
4618 gcc_assert (!BRACE_ENCLOSED_INITIALIZER_P (init));
4621 warning (OPT_Wmissing_braces, "missing braces around initializer for %qT",
4625 /* Dispatch to specialized routines. */
4626 if (CLASS_TYPE_P (type))
4627 return reshape_init_class (type, d, first_initializer_p);
4628 else if (TREE_CODE (type) == ARRAY_TYPE)
4629 return reshape_init_array (type, d);
4630 else if (TREE_CODE (type) == VECTOR_TYPE)
4631 return reshape_init_vector (type, d);
4636 /* Undo the brace-elision allowed by [dcl.init.aggr] in a
4637 brace-enclosed aggregate initializer.
4639 INIT is the CONSTRUCTOR containing the list of initializers describing
4640 a brace-enclosed initializer for an entity of the indicated aggregate TYPE.
4641 It may not presently match the shape of the TYPE; for example:
4643 struct S { int a; int b; };
4644 struct S a[] = { 1, 2, 3, 4 };
4646 Here INIT will hold a VEC of four elements, rather than a
4647 VEC of two elements, each itself a VEC of two elements. This
4648 routine transforms INIT from the former form into the latter. The
4649 revised CONSTRUCTOR node is returned. */
4652 reshape_init (tree type, tree init)
4654 VEC(constructor_elt, gc) *v;
4658 gcc_assert (BRACE_ENCLOSED_INITIALIZER_P (init));
4660 v = CONSTRUCTOR_ELTS (init);
4662 /* An empty constructor does not need reshaping, and it is always a valid
4664 if (VEC_empty (constructor_elt, v))
4667 /* Recurse on this CONSTRUCTOR. */
4668 d.cur = VEC_index (constructor_elt, v, 0);
4669 d.end = d.cur + VEC_length (constructor_elt, v);
4671 new_init = reshape_init_r (type, &d, true);
4672 if (new_init == error_mark_node)
4673 return error_mark_node;
4675 /* Make sure all the element of the constructor were used. Otherwise,
4676 issue an error about exceeding initializers. */
4678 error ("too many initializers for %qT", type);
4683 /* Verify INIT (the initializer for DECL), and record the
4684 initialization in DECL_INITIAL, if appropriate. CLEANUP is as for
4685 grok_reference_init.
4687 If the return value is non-NULL, it is an expression that must be
4688 evaluated dynamically to initialize DECL. */
4691 check_initializer (tree decl, tree init, int flags, tree *cleanup)
4693 tree type = TREE_TYPE (decl);
4694 tree init_code = NULL;
4696 /* Things that are going to be initialized need to have complete
4698 TREE_TYPE (decl) = type = complete_type (TREE_TYPE (decl));
4700 if (type == error_mark_node)
4701 /* We will have already complained. */
4704 if (TREE_CODE (type) == ARRAY_TYPE)
4706 tree element_type = TREE_TYPE (type);
4708 /* The array type itself need not be complete, because the
4709 initializer may tell us how many elements are in the array.
4710 But, the elements of the array must be complete. */
4711 if (!COMPLETE_TYPE_P (complete_type (element_type)))
4713 error ("elements of array %q#D have incomplete type", decl);
4716 /* It is not valid to initialize an a VLA. */
4718 && ((COMPLETE_TYPE_P (type) && !TREE_CONSTANT (TYPE_SIZE (type)))
4719 || !TREE_CONSTANT (TYPE_SIZE (element_type))))
4721 error ("variable-sized object %qD may not be initialized", decl);
4725 else if (!COMPLETE_TYPE_P (type))
4727 error ("%qD has incomplete type", decl);
4728 TREE_TYPE (decl) = error_mark_node;
4732 /* There is no way to make a variable-sized class type in GNU C++. */
4733 gcc_assert (TREE_CONSTANT (TYPE_SIZE (type)));
4735 if (!CP_AGGREGATE_TYPE_P (type)
4736 && init && BRACE_ENCLOSED_INITIALIZER_P (init)
4737 && VEC_length (constructor_elt, CONSTRUCTOR_ELTS (init)) != 1)
4739 error ("scalar object %qD requires one element in initializer", decl);
4740 TREE_TYPE (decl) = error_mark_node;
4744 if (TREE_CODE (decl) == CONST_DECL)
4746 gcc_assert (TREE_CODE (type) != REFERENCE_TYPE);
4748 DECL_INITIAL (decl) = init;
4750 gcc_assert (init != NULL_TREE);
4753 else if (!DECL_EXTERNAL (decl) && TREE_CODE (type) == REFERENCE_TYPE)
4754 init = grok_reference_init (decl, type, init, cleanup);
4757 /* Do not reshape constructors of vectors (they don't need to be
4759 if (TREE_CODE (init) == CONSTRUCTOR
4760 && !COMPOUND_LITERAL_P (init)
4761 && !TREE_TYPE (init)) /* ptrmemfunc */
4763 init = reshape_init (type, init);
4765 if ((*targetm.vector_opaque_p) (type))
4767 error ("opaque vector types cannot be initialized");
4768 init = error_mark_node;
4772 /* If DECL has an array type without a specific bound, deduce the
4773 array size from the initializer. */
4774 maybe_deduce_size_from_array_init (decl, init);
4775 type = TREE_TYPE (decl);
4776 if (type == error_mark_node)
4779 if (TYPE_HAS_CONSTRUCTOR (type) || TYPE_NEEDS_CONSTRUCTING (type))
4781 if (TREE_CODE (type) == ARRAY_TYPE)
4782 goto initialize_aggr;
4783 else if (TREE_CODE (init) == CONSTRUCTOR)
4785 if (TYPE_NON_AGGREGATE_CLASS (type))
4787 error ("%qD must be initialized by constructor, "
4790 init = error_mark_node;
4793 goto dont_use_constructor;
4797 int saved_stmts_are_full_exprs_p;
4800 saved_stmts_are_full_exprs_p = 0;
4801 if (building_stmt_tree ())
4803 saved_stmts_are_full_exprs_p = stmts_are_full_exprs_p ();
4804 current_stmt_tree ()->stmts_are_full_exprs_p = 1;
4806 init = build_aggr_init (decl, init, flags);
4807 if (building_stmt_tree ())
4808 current_stmt_tree ()->stmts_are_full_exprs_p =
4809 saved_stmts_are_full_exprs_p;
4815 dont_use_constructor:
4816 if (TREE_CODE (init) != TREE_VEC)
4818 init_code = store_init_value (decl, init);
4819 if (pedantic && TREE_CODE (type) == ARRAY_TYPE
4820 && DECL_INITIAL (decl)
4821 && TREE_CODE (DECL_INITIAL (decl)) == STRING_CST
4822 && PAREN_STRING_LITERAL_P (DECL_INITIAL (decl)))
4823 warning (0, "array %qD initialized by parenthesized string literal %qE",
4824 decl, DECL_INITIAL (decl));
4829 else if (DECL_EXTERNAL (decl))
4831 else if (TYPE_P (type) && TYPE_NEEDS_CONSTRUCTING (type))
4832 goto initialize_aggr;
4833 else if (IS_AGGR_TYPE (type))
4835 tree core_type = strip_array_types (type);
4837 if (CLASSTYPE_READONLY_FIELDS_NEED_INIT (core_type))
4838 error ("structure %qD with uninitialized const members", decl);
4839 if (CLASSTYPE_REF_FIELDS_NEED_INIT (core_type))
4840 error ("structure %qD with uninitialized reference members", decl);
4842 check_for_uninitialized_const_var (decl);
4845 check_for_uninitialized_const_var (decl);
4847 if (init && init != error_mark_node)
4848 init_code = build2 (INIT_EXPR, type, decl, init);
4853 /* If DECL is not a local variable, give it RTL. */
4856 make_rtl_for_nonlocal_decl (tree decl, tree init, const char* asmspec)
4858 int toplev = toplevel_bindings_p ();
4860 const char *filename;
4862 /* Set the DECL_ASSEMBLER_NAME for the object. */
4865 /* The `register' keyword, when used together with an
4866 asm-specification, indicates that the variable should be
4867 placed in a particular register. */
4868 if (TREE_CODE (decl) == VAR_DECL && DECL_REGISTER (decl))
4870 set_user_assembler_name (decl, asmspec);
4871 DECL_HARD_REGISTER (decl) = 1;
4875 if (TREE_CODE (decl) == FUNCTION_DECL
4876 && DECL_BUILT_IN_CLASS (decl) == BUILT_IN_NORMAL)
4877 set_builtin_user_assembler_name (decl, asmspec);
4878 set_user_assembler_name (decl, asmspec);
4882 /* Handle non-variables up front. */
4883 if (TREE_CODE (decl) != VAR_DECL)
4885 rest_of_decl_compilation (decl, toplev, at_eof);
4889 /* If we see a class member here, it should be a static data
4891 if (DECL_LANG_SPECIFIC (decl) && DECL_IN_AGGR_P (decl))
4893 gcc_assert (TREE_STATIC (decl));
4894 /* An in-class declaration of a static data member should be
4895 external; it is only a declaration, and not a definition. */
4896 if (init == NULL_TREE)
4897 gcc_assert (DECL_EXTERNAL (decl));
4900 /* We don't create any RTL for local variables. */
4901 if (DECL_FUNCTION_SCOPE_P (decl) && !TREE_STATIC (decl))
4904 /* We defer emission of local statics until the corresponding
4905 DECL_EXPR is expanded. */
4906 defer_p = DECL_FUNCTION_SCOPE_P (decl) || DECL_VIRTUAL_P (decl);
4908 /* We try to defer namespace-scope static constants so that they are
4909 not emitted into the object file unnecessarily. */
4910 filename = input_filename;
4911 if (!DECL_VIRTUAL_P (decl)
4912 && TREE_READONLY (decl)
4913 && DECL_INITIAL (decl) != NULL_TREE
4914 && DECL_INITIAL (decl) != error_mark_node
4916 && ! EMPTY_CONSTRUCTOR_P (DECL_INITIAL (decl))
4918 && !TREE_PUBLIC (decl))
4920 /* Fool with the linkage of static consts according to #pragma
4922 struct c_fileinfo *finfo = get_fileinfo (filename);
4923 if (!finfo->interface_unknown && !TREE_PUBLIC (decl))
4925 TREE_PUBLIC (decl) = 1;
4926 DECL_EXTERNAL (decl) = finfo->interface_only;
4931 /* Likewise for template instantiations. */
4932 else if (DECL_LANG_SPECIFIC (decl)
4933 && DECL_IMPLICIT_INSTANTIATION (decl))
4936 /* If we're not deferring, go ahead and assemble the variable. */
4938 rest_of_decl_compilation (decl, toplev, at_eof);
4941 /* Generate code to initialize DECL (a local variable). */
4944 initialize_local_var (tree decl, tree init)
4946 tree type = TREE_TYPE (decl);
4949 gcc_assert (TREE_CODE (decl) == VAR_DECL
4950 || TREE_CODE (decl) == RESULT_DECL);
4951 gcc_assert (!TREE_STATIC (decl));
4953 if (DECL_SIZE (decl) == NULL_TREE)
4955 /* If we used it already as memory, it must stay in memory. */
4956 DECL_INITIAL (decl) = NULL_TREE;
4957 TREE_ADDRESSABLE (decl) = TREE_USED (decl);
4960 if (DECL_SIZE (decl) && type != error_mark_node)
4964 /* Compute and store the initial value. */
4965 already_used = TREE_USED (decl) || TREE_USED (type);
4967 /* Perform the initialization. */
4970 int saved_stmts_are_full_exprs_p;
4972 gcc_assert (building_stmt_tree ());
4973 saved_stmts_are_full_exprs_p = stmts_are_full_exprs_p ();
4974 current_stmt_tree ()->stmts_are_full_exprs_p = 1;
4975 finish_expr_stmt (init);
4976 current_stmt_tree ()->stmts_are_full_exprs_p =
4977 saved_stmts_are_full_exprs_p;
4980 /* Set this to 0 so we can tell whether an aggregate which was
4981 initialized was ever used. Don't do this if it has a
4982 destructor, so we don't complain about the 'resource
4983 allocation is initialization' idiom. Now set
4984 attribute((unused)) on types so decls of that type will be
4985 marked used. (see TREE_USED, above.) */
4986 if (TYPE_NEEDS_CONSTRUCTING (type)
4988 && TYPE_HAS_TRIVIAL_DESTRUCTOR (type)
4989 && DECL_NAME (decl))
4990 TREE_USED (decl) = 0;
4991 else if (already_used)
4992 TREE_USED (decl) = 1;
4995 /* Generate a cleanup, if necessary. */
4996 cleanup = cxx_maybe_build_cleanup (decl);
4997 if (DECL_SIZE (decl) && cleanup)
4998 finish_decl_cleanup (decl, cleanup);
5001 /* DECL is a VAR_DECL for a compiler-generated variable with static
5002 storage duration (like a virtual table) whose initializer is a
5003 compile-time constant. INIT must be either a TREE_LIST of values,
5004 or a CONSTRUCTOR. Initialize the variable and provide it to the
5008 initialize_artificial_var (tree decl, tree init)
5010 gcc_assert (DECL_ARTIFICIAL (decl));
5011 if (TREE_CODE (init) == TREE_LIST)
5012 init = build_constructor_from_list (NULL_TREE, init);
5013 gcc_assert (TREE_CODE (init) == CONSTRUCTOR);
5014 DECL_INITIAL (decl) = init;
5015 DECL_INITIALIZED_P (decl) = 1;
5016 determine_visibility (decl);
5017 layout_var_decl (decl);
5018 maybe_commonize_var (decl);
5019 make_rtl_for_nonlocal_decl (decl, init, /*asmspec=*/NULL);
5022 /* Finish processing of a declaration;
5023 install its line number and initial value.
5024 If the length of an array type is not known before,
5025 it must be determined now, from the initial value, or it is an error.
5027 INIT is the initializer (if any) for DECL. If INIT_CONST_EXPR_P is
5028 true, then INIT is an integral constant expression.
5030 FLAGS is LOOKUP_ONLYCONVERTING if the = init syntax was used, else 0
5031 if the (init) syntax was used. */
5034 cp_finish_decl (tree decl, tree init, bool init_const_expr_p,
5035 tree asmspec_tree, int flags)
5039 const char *asmspec = NULL;
5040 int was_readonly = 0;
5041 bool var_definition_p = false;
5042 int saved_processing_template_decl;
5044 if (decl == error_mark_node)
5049 error ("assignment (not initialization) in declaration");
5053 gcc_assert (TREE_CODE (decl) != RESULT_DECL);
5054 /* Parameters are handled by store_parm_decls, not cp_finish_decl. */
5055 gcc_assert (TREE_CODE (decl) != PARM_DECL);
5057 type = TREE_TYPE (decl);
5058 if (type == error_mark_node)
5061 /* Assume no cleanup is required. */
5062 cleanup = NULL_TREE;
5063 saved_processing_template_decl = processing_template_decl;
5065 /* If a name was specified, get the string. */
5066 if (global_scope_p (current_binding_level))
5067 asmspec_tree = maybe_apply_renaming_pragma (decl, asmspec_tree);
5068 if (asmspec_tree && asmspec_tree != error_mark_node)
5069 asmspec = TREE_STRING_POINTER (asmspec_tree);
5071 if (current_class_type
5072 && CP_DECL_CONTEXT (decl) == current_class_type
5073 && TYPE_BEING_DEFINED (current_class_type)
5074 && (DECL_INITIAL (decl) || init))
5075 DECL_INITIALIZED_IN_CLASS_P (decl) = 1;
5077 if (processing_template_decl)
5079 bool type_dependent_p;
5081 /* Add this declaration to the statement-tree. */
5082 if (at_function_scope_p ())
5083 add_decl_expr (decl);
5085 type_dependent_p = dependent_type_p (type);
5087 if (init && init_const_expr_p)
5089 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (decl) = 1;
5090 if (DECL_INTEGRAL_CONSTANT_VAR_P (decl))
5091 TREE_CONSTANT (decl) = 1;
5095 || !DECL_CLASS_SCOPE_P (decl)
5096 || !DECL_INTEGRAL_CONSTANT_VAR_P (decl)
5098 || value_dependent_expression_p (init))
5101 DECL_INITIAL (decl) = init;
5102 if (TREE_CODE (decl) == VAR_DECL
5103 && !DECL_PRETTY_FUNCTION_P (decl)
5104 && !type_dependent_p)
5105 maybe_deduce_size_from_array_init (decl, init);
5109 init = fold_non_dependent_expr (init);
5110 processing_template_decl = 0;
5113 /* Take care of TYPE_DECLs up front. */
5114 if (TREE_CODE (decl) == TYPE_DECL)
5116 if (type != error_mark_node
5117 && IS_AGGR_TYPE (type) && DECL_NAME (decl))
5119 if (TREE_TYPE (DECL_NAME (decl)) && TREE_TYPE (decl) != type)
5120 warning (0, "shadowing previous type declaration of %q#D", decl);
5121 set_identifier_type_value (DECL_NAME (decl), decl);
5124 /* If we have installed this as the canonical typedef for this
5125 type, and that type has not been defined yet, delay emitting
5126 the debug information for it, as we will emit it later. */
5127 if (TYPE_MAIN_DECL (TREE_TYPE (decl)) == decl
5128 && !COMPLETE_TYPE_P (TREE_TYPE (decl)))
5129 TYPE_DECL_SUPPRESS_DEBUG (decl) = 1;
5131 rest_of_decl_compilation (decl, DECL_CONTEXT (decl) == NULL_TREE,
5136 /* A reference will be modified here, as it is initialized. */
5137 if (! DECL_EXTERNAL (decl)
5138 && TREE_READONLY (decl)
5139 && TREE_CODE (type) == REFERENCE_TYPE)
5142 TREE_READONLY (decl) = 0;
5145 if (TREE_CODE (decl) == VAR_DECL)
5147 /* Only PODs can have thread-local storage. Other types may require
5148 various kinds of non-trivial initialization. */
5149 if (DECL_THREAD_LOCAL_P (decl) && !pod_type_p (TREE_TYPE (decl)))
5150 error ("%qD cannot be thread-local because it has non-POD type %qT",
5151 decl, TREE_TYPE (decl));
5152 /* If this is a local variable that will need a mangled name,
5153 register it now. We must do this before processing the
5154 initializer for the variable, since the initialization might
5155 require a guard variable, and since the mangled name of the
5156 guard variable will depend on the mangled name of this
5158 if (!processing_template_decl
5159 && DECL_FUNCTION_SCOPE_P (decl)
5160 && TREE_STATIC (decl)
5161 && !DECL_ARTIFICIAL (decl))
5162 push_local_name (decl);
5163 /* Convert the initializer to the type of DECL, if we have not
5164 already initialized DECL. */
5165 if (!DECL_INITIALIZED_P (decl)
5166 /* If !DECL_EXTERNAL then DECL is being defined. In the
5167 case of a static data member initialized inside the
5168 class-specifier, there can be an initializer even if DECL
5169 is *not* defined. */
5170 && (!DECL_EXTERNAL (decl) || init))
5174 DECL_NONTRIVIALLY_INITIALIZED_P (decl) = 1;
5175 if (init_const_expr_p)
5177 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (decl) = 1;
5178 if (DECL_INTEGRAL_CONSTANT_VAR_P (decl))
5179 TREE_CONSTANT (decl) = 1;
5182 init = check_initializer (decl, init, flags, &cleanup);
5183 /* Thread-local storage cannot be dynamically initialized. */
5184 if (DECL_THREAD_LOCAL_P (decl) && init)
5186 error ("%qD is thread-local and so cannot be dynamically "
5187 "initialized", decl);
5191 /* Check that the initializer for a static data member was a
5192 constant. Although we check in the parser that the
5193 initializer is an integral constant expression, we do not
5194 simplify division-by-zero at the point at which it
5195 occurs. Therefore, in:
5197 struct S { static const int i = 7 / 0; };
5199 we issue an error at this point. It would
5200 probably be better to forbid division by zero in
5201 integral constant expressions. */
5202 if (DECL_EXTERNAL (decl) && init)
5204 error ("%qD cannot be initialized by a non-constant expression"
5205 " when being declared", decl);
5206 DECL_INITIALIZED_IN_CLASS_P (decl) = 0;
5214 The memory occupied by any object of static storage
5215 duration is zero-initialized at program startup before
5216 any other initialization takes place.
5218 We cannot create an appropriate initializer until after
5219 the type of DECL is finalized. If DECL_INITIAL is set,
5220 then the DECL is statically initialized, and any
5221 necessary zero-initialization has already been performed. */
5222 if (TREE_STATIC (decl) && !DECL_INITIAL (decl))
5223 DECL_INITIAL (decl) = build_zero_init (TREE_TYPE (decl),
5224 /*nelts=*/NULL_TREE,
5225 /*static_storage_p=*/true);
5226 /* Remember that the initialization for this variable has
5228 DECL_INITIALIZED_P (decl) = 1;
5229 /* This declaration is the definition of this variable,
5230 unless we are initializing a static data member within
5231 the class specifier. */
5232 if (!DECL_EXTERNAL (decl))
5233 var_definition_p = true;
5235 /* If the variable has an array type, lay out the type, even if
5236 there is no initializer. It is valid to index through the
5237 array, and we must get TYPE_ALIGN set correctly on the array
5239 else if (TREE_CODE (type) == ARRAY_TYPE)
5243 /* Add this declaration to the statement-tree. This needs to happen
5244 after the call to check_initializer so that the DECL_EXPR for a
5245 reference temp is added before the DECL_EXPR for the reference itself. */
5246 if (at_function_scope_p ())
5247 add_decl_expr (decl);
5249 /* Let the middle end know about variables and functions -- but not
5250 static data members in uninstantiated class templates. */
5251 if (!saved_processing_template_decl
5252 && (TREE_CODE (decl) == VAR_DECL
5253 || TREE_CODE (decl) == FUNCTION_DECL))
5255 if (TREE_CODE (decl) == VAR_DECL)
5257 layout_var_decl (decl);
5258 maybe_commonize_var (decl);
5259 if (DECL_NAMESPACE_SCOPE_P (decl) && !TREE_PUBLIC (decl)
5260 && !DECL_THIS_STATIC (decl) && !DECL_ARTIFICIAL (decl))
5262 /* This is a const variable with implicit 'static'. Set
5263 DECL_THIS_STATIC so we can tell it from variables that are
5264 !TREE_PUBLIC because of the anonymous namespace. */
5265 DECL_THIS_STATIC (decl) = 1;
5269 make_rtl_for_nonlocal_decl (decl, init, asmspec);
5271 /* Check for abstractness of the type. Notice that there is no
5272 need to strip array types here since the check for those types
5273 is already done within create_array_type_for_decl. */
5274 if (TREE_CODE (type) == FUNCTION_TYPE
5275 || TREE_CODE (type) == METHOD_TYPE)
5276 abstract_virtuals_error (decl, TREE_TYPE (type));
5278 abstract_virtuals_error (decl, type);
5280 /* This needs to happen after the linkage is set. */
5281 determine_visibility (decl);
5283 if (TREE_CODE (decl) == FUNCTION_DECL
5284 || TREE_TYPE (decl) == error_mark_node)
5285 /* No initialization required. */
5287 else if (DECL_EXTERNAL (decl)
5288 && ! (DECL_LANG_SPECIFIC (decl)
5289 && DECL_NOT_REALLY_EXTERN (decl)))
5292 DECL_INITIAL (decl) = init;
5296 /* A variable definition. */
5297 if (DECL_FUNCTION_SCOPE_P (decl))
5299 /* Initialize the local variable. */
5300 if (processing_template_decl)
5301 DECL_INITIAL (decl) = init;
5302 else if (!TREE_STATIC (decl))
5303 initialize_local_var (decl, init);
5306 /* If a variable is defined, and then a subsequent
5307 definition with external linkage is encountered, we will
5308 get here twice for the same variable. We want to avoid
5309 calling expand_static_init more than once. For variables
5310 that are not static data members, we can call
5311 expand_static_init only when we actually process the
5312 initializer. It is not legal to redeclare a static data
5313 member, so this issue does not arise in that case. */
5314 if (var_definition_p && TREE_STATIC (decl))
5315 expand_static_init (decl, init);
5319 /* If a CLEANUP_STMT was created to destroy a temporary bound to a
5320 reference, insert it in the statement-tree now. */
5322 push_cleanup (decl, cleanup, false);
5325 processing_template_decl = saved_processing_template_decl;
5328 TREE_READONLY (decl) = 1;
5330 /* If this was marked 'used', be sure it will be output. */
5331 if (lookup_attribute ("used", DECL_ATTRIBUTES (decl)))
5332 mark_decl_referenced (decl);
5335 /* This is here for a midend callback from c-common.c. */
5338 finish_decl (tree decl, tree init, tree asmspec_tree)
5340 cp_finish_decl (decl, init, /*init_const_expr_p=*/false, asmspec_tree, 0);
5343 /* Returns a declaration for a VAR_DECL as if:
5345 extern "C" TYPE NAME;
5347 had been seen. Used to create compiler-generated global
5351 declare_global_var (tree name, tree type)
5355 push_to_top_level ();
5356 decl = build_decl (VAR_DECL, name, type);
5357 TREE_PUBLIC (decl) = 1;
5358 DECL_EXTERNAL (decl) = 1;
5359 DECL_ARTIFICIAL (decl) = 1;
5360 /* If the user has explicitly declared this variable (perhaps
5361 because the code we are compiling is part of a low-level runtime
5362 library), then it is possible that our declaration will be merged
5363 with theirs by pushdecl. */
5364 decl = pushdecl (decl);
5365 finish_decl (decl, NULL_TREE, NULL_TREE);
5366 pop_from_top_level ();
5371 /* Returns a pointer to the `atexit' function. Note that if
5372 FLAG_USE_CXA_ATEXIT is nonzero, then this will actually be the new
5373 `__cxa_atexit' function specified in the IA64 C++ ABI. */
5376 get_atexit_node (void)
5383 bool use_aeabi_atexit;
5388 if (flag_use_cxa_atexit)
5390 /* The declaration for `__cxa_atexit' is:
5392 int __cxa_atexit (void (*)(void *), void *, void *)
5394 We build up the argument types and then then function type
5397 use_aeabi_atexit = targetm.cxx.use_aeabi_atexit ();
5398 /* First, build the pointer-to-function type for the first
5400 arg_types = tree_cons (NULL_TREE, ptr_type_node, void_list_node);
5401 fn_type = build_function_type (void_type_node, arg_types);
5402 fn_ptr_type = build_pointer_type (fn_type);
5403 /* Then, build the rest of the argument types. */
5404 arg_types = tree_cons (NULL_TREE, ptr_type_node, void_list_node);
5405 if (use_aeabi_atexit)
5407 arg_types = tree_cons (NULL_TREE, fn_ptr_type, arg_types);
5408 arg_types = tree_cons (NULL_TREE, ptr_type_node, arg_types);
5412 arg_types = tree_cons (NULL_TREE, ptr_type_node, arg_types);
5413 arg_types = tree_cons (NULL_TREE, fn_ptr_type, arg_types);
5415 /* And the final __cxa_atexit type. */
5416 fn_type = build_function_type (integer_type_node, arg_types);
5417 fn_ptr_type = build_pointer_type (fn_type);
5418 if (use_aeabi_atexit)
5419 name = "__aeabi_atexit";
5421 name = "__cxa_atexit";
5425 /* The declaration for `atexit' is:
5427 int atexit (void (*)());
5429 We build up the argument types and then then function type
5431 fn_type = build_function_type (void_type_node, void_list_node);
5432 fn_ptr_type = build_pointer_type (fn_type);
5433 arg_types = tree_cons (NULL_TREE, fn_ptr_type, void_list_node);
5434 /* Build the final atexit type. */
5435 fn_type = build_function_type (integer_type_node, arg_types);
5439 /* Now, build the function declaration. */
5440 push_lang_context (lang_name_c);
5441 atexit_fndecl = build_library_fn_ptr (name, fn_type);
5442 mark_used (atexit_fndecl);
5443 pop_lang_context ();
5444 atexit_node = decay_conversion (atexit_fndecl);
5449 /* Returns the __dso_handle VAR_DECL. */
5452 get_dso_handle_node (void)
5454 if (dso_handle_node)
5455 return dso_handle_node;
5457 /* Declare the variable. */
5458 dso_handle_node = declare_global_var (get_identifier ("__dso_handle"),
5461 return dso_handle_node;
5464 /* Begin a new function with internal linkage whose job will be simply
5465 to destroy some particular variable. */
5467 static GTY(()) int start_cleanup_cnt;
5470 start_cleanup_fn (void)
5477 push_to_top_level ();
5479 /* No need to mangle this. */
5480 push_lang_context (lang_name_c);
5482 /* Build the parameter-types. */
5483 parmtypes = void_list_node;
5484 /* Functions passed to __cxa_atexit take an additional parameter.
5485 We'll just ignore it. After we implement the new calling
5486 convention for destructors, we can eliminate the use of
5487 additional cleanup functions entirely in the -fnew-abi case. */
5488 if (flag_use_cxa_atexit)
5489 parmtypes = tree_cons (NULL_TREE, ptr_type_node, parmtypes);
5490 /* Build the function type itself. */
5491 fntype = build_function_type (void_type_node, parmtypes);
5492 /* Build the name of the function. */
5493 sprintf (name, "__tcf_%d", start_cleanup_cnt++);
5494 /* Build the function declaration. */
5495 fndecl = build_lang_decl (FUNCTION_DECL, get_identifier (name), fntype);
5496 /* It's a function with internal linkage, generated by the
5498 TREE_PUBLIC (fndecl) = 0;
5499 DECL_ARTIFICIAL (fndecl) = 1;
5500 /* Make the function `inline' so that it is only emitted if it is
5501 actually needed. It is unlikely that it will be inlined, since
5502 it is only called via a function pointer, but we avoid unnecessary
5503 emissions this way. */
5504 DECL_INLINE (fndecl) = 1;
5505 DECL_DECLARED_INLINE_P (fndecl) = 1;
5506 DECL_INTERFACE_KNOWN (fndecl) = 1;
5507 /* Build the parameter. */
5508 if (flag_use_cxa_atexit)
5512 parmdecl = cp_build_parm_decl (NULL_TREE, ptr_type_node);
5513 DECL_CONTEXT (parmdecl) = fndecl;
5514 TREE_USED (parmdecl) = 1;
5515 DECL_ARGUMENTS (fndecl) = parmdecl;
5519 start_preparsed_function (fndecl, NULL_TREE, SF_PRE_PARSED);
5521 pop_lang_context ();
5523 return current_function_decl;
5526 /* Finish the cleanup function begun by start_cleanup_fn. */
5529 end_cleanup_fn (void)
5531 expand_or_defer_fn (finish_function (0));
5533 pop_from_top_level ();
5536 /* Generate code to handle the destruction of DECL, an object with
5537 static storage duration. */
5540 register_dtor_fn (tree decl)
5547 if (TYPE_HAS_TRIVIAL_DESTRUCTOR (TREE_TYPE (decl)))
5548 return void_zero_node;
5550 /* Call build_cleanup before we enter the anonymous function so that
5551 any access checks will be done relative to the current scope,
5552 rather than the scope of the anonymous function. */
5553 build_cleanup (decl);
5555 /* Now start the function. */
5556 cleanup = start_cleanup_fn ();
5558 /* Now, recompute the cleanup. It may contain SAVE_EXPRs that refer
5559 to the original function, rather than the anonymous one. That
5560 will make the back-end think that nested functions are in use,
5561 which causes confusion. */
5563 push_deferring_access_checks (dk_no_check);
5564 fcall = build_cleanup (decl);
5565 pop_deferring_access_checks ();
5567 /* Create the body of the anonymous function. */
5568 compound_stmt = begin_compound_stmt (BCS_FN_BODY);
5569 finish_expr_stmt (fcall);
5570 finish_compound_stmt (compound_stmt);
5573 /* Call atexit with the cleanup function. */
5574 cxx_mark_addressable (cleanup);
5575 mark_used (cleanup);
5576 cleanup = build_unary_op (ADDR_EXPR, cleanup, 0);
5577 if (flag_use_cxa_atexit)
5579 args = tree_cons (NULL_TREE,
5580 build_unary_op (ADDR_EXPR, get_dso_handle_node (), 0),
5582 if (targetm.cxx.use_aeabi_atexit ())
5584 args = tree_cons (NULL_TREE, cleanup, args);
5585 args = tree_cons (NULL_TREE, null_pointer_node, args);
5589 args = tree_cons (NULL_TREE, null_pointer_node, args);
5590 args = tree_cons (NULL_TREE, cleanup, args);
5594 args = tree_cons (NULL_TREE, cleanup, NULL_TREE);
5595 return build_function_call (get_atexit_node (), args);
5598 /* DECL is a VAR_DECL with static storage duration. INIT, if present,
5599 is its initializer. Generate code to handle the construction
5600 and destruction of DECL. */
5603 expand_static_init (tree decl, tree init)
5605 gcc_assert (TREE_CODE (decl) == VAR_DECL);
5606 gcc_assert (TREE_STATIC (decl));
5608 /* Some variables require no initialization. */
5610 && !TYPE_NEEDS_CONSTRUCTING (TREE_TYPE (decl))
5611 && TYPE_HAS_TRIVIAL_DESTRUCTOR (TREE_TYPE (decl)))
5614 if (DECL_FUNCTION_SCOPE_P (decl))
5616 /* Emit code to perform this initialization but once. */
5617 tree if_stmt = NULL_TREE, inner_if_stmt = NULL_TREE;
5618 tree then_clause = NULL_TREE, inner_then_clause = NULL_TREE;
5619 tree guard, guard_addr, guard_addr_list;
5620 tree acquire_fn, release_fn, abort_fn;
5623 /* Emit code to perform this initialization but once. This code
5626 static <type> guard;
5627 if (!guard.first_byte) {
5628 if (__cxa_guard_acquire (&guard)) {
5631 // Do initialization.
5632 flag = true; __cxa_guard_release (&guard);
5633 // Register variable for destruction at end of program.
5635 if (!flag) __cxa_guard_abort (&guard);
5639 Note that the `flag' variable is only set to 1 *after* the
5640 initialization is complete. This ensures that an exception,
5641 thrown during the construction, will cause the variable to
5642 reinitialized when we pass through this code again, as per:
5646 If the initialization exits by throwing an exception, the
5647 initialization is not complete, so it will be tried again
5648 the next time control enters the declaration.
5650 This process should be thread-safe, too; multiple threads
5651 should not be able to initialize the variable more than
5654 /* Create the guard variable. */
5655 guard = get_guard (decl);
5657 /* This optimization isn't safe on targets with relaxed memory
5658 consistency. On such targets we force synchronization in
5659 __cxa_guard_acquire. */
5660 if (!targetm.relaxed_ordering || !flag_threadsafe_statics)
5662 /* Begin the conditional initialization. */
5663 if_stmt = begin_if_stmt ();
5664 finish_if_stmt_cond (get_guard_cond (guard), if_stmt);
5665 then_clause = begin_compound_stmt (BCS_NO_SCOPE);
5668 if (flag_threadsafe_statics)
5670 guard_addr = build_address (guard);
5671 guard_addr_list = build_tree_list (NULL_TREE, guard_addr);
5673 acquire_fn = get_identifier ("__cxa_guard_acquire");
5674 release_fn = get_identifier ("__cxa_guard_release");
5675 abort_fn = get_identifier ("__cxa_guard_abort");
5676 if (!get_global_value_if_present (acquire_fn, &acquire_fn))
5678 tree argtypes = tree_cons (NULL_TREE, TREE_TYPE (guard_addr),
5680 tree vfntype = build_function_type (void_type_node, argtypes);
5681 acquire_fn = push_library_fn
5682 (acquire_fn, build_function_type (integer_type_node, argtypes));
5683 release_fn = push_library_fn (release_fn, vfntype);
5684 abort_fn = push_library_fn (abort_fn, vfntype);
5688 release_fn = identifier_global_value (release_fn);
5689 abort_fn = identifier_global_value (abort_fn);
5692 inner_if_stmt = begin_if_stmt ();
5693 finish_if_stmt_cond (build_call (acquire_fn, guard_addr_list),
5696 inner_then_clause = begin_compound_stmt (BCS_NO_SCOPE);
5697 begin = get_target_expr (boolean_false_node);
5698 flag = TARGET_EXPR_SLOT (begin);
5700 TARGET_EXPR_CLEANUP (begin)
5701 = build3 (COND_EXPR, void_type_node, flag,
5703 build_call (abort_fn, guard_addr_list));
5704 CLEANUP_EH_ONLY (begin) = 1;
5706 /* Do the initialization itself. */
5707 init = add_stmt_to_compound (begin, init);
5708 init = add_stmt_to_compound
5709 (init, build2 (MODIFY_EXPR, void_type_node, flag, boolean_true_node));
5710 init = add_stmt_to_compound
5711 (init, build_call (release_fn, guard_addr_list));
5714 init = add_stmt_to_compound (init, set_guard (guard));
5716 /* Use atexit to register a function for destroying this static
5718 init = add_stmt_to_compound (init, register_dtor_fn (decl));
5720 finish_expr_stmt (init);
5722 if (flag_threadsafe_statics)
5724 finish_compound_stmt (inner_then_clause);
5725 finish_then_clause (inner_if_stmt);
5726 finish_if_stmt (inner_if_stmt);
5729 if (!targetm.relaxed_ordering || !flag_threadsafe_statics)
5731 finish_compound_stmt (then_clause);
5732 finish_then_clause (if_stmt);
5733 finish_if_stmt (if_stmt);
5737 static_aggregates = tree_cons (init, decl, static_aggregates);
5741 /* Make TYPE a complete type based on INITIAL_VALUE.
5742 Return 0 if successful, 1 if INITIAL_VALUE can't be deciphered,
5743 2 if there was no information (in which case assume 0 if DO_DEFAULT),
5744 3 if the initializer list is empty (in pedantic mode). */
5747 cp_complete_array_type (tree *ptype, tree initial_value, bool do_default)
5750 tree type, elt_type;
5754 /* An array of character type can be initialized from a
5755 brace-enclosed string constant.
5757 FIXME: this code is duplicated from reshape_init. Probably
5758 we should just call reshape_init here? */
5759 if (char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (*ptype)))
5760 && TREE_CODE (initial_value) == CONSTRUCTOR
5761 && !VEC_empty (constructor_elt, CONSTRUCTOR_ELTS (initial_value)))
5763 VEC(constructor_elt,gc) *v = CONSTRUCTOR_ELTS (initial_value);
5764 tree value = VEC_index (constructor_elt, v, 0)->value;
5766 if (TREE_CODE (value) == STRING_CST
5767 && VEC_length (constructor_elt, v) == 1)
5768 initial_value = value;
5772 failure = complete_array_type (ptype, initial_value, do_default);
5774 /* We can create the array before the element type is complete, which
5775 means that we didn't have these two bits set in the original type
5776 either. In completing the type, we are expected to propagate these
5777 bits. See also complete_type which does the same thing for arrays
5780 if (TYPE_DOMAIN (type))
5782 elt_type = TREE_TYPE (type);
5783 TYPE_NEEDS_CONSTRUCTING (type) = TYPE_NEEDS_CONSTRUCTING (elt_type);
5784 TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type)
5785 = TYPE_HAS_NONTRIVIAL_DESTRUCTOR (elt_type);
5791 /* Return zero if something is declared to be a member of type
5792 CTYPE when in the context of CUR_TYPE. STRING is the error
5793 message to print in that case. Otherwise, quietly return 1. */
5796 member_function_or_else (tree ctype, tree cur_type, enum overload_flags flags)
5798 if (ctype && ctype != cur_type)
5800 if (flags == DTOR_FLAG)
5801 error ("destructor for alien class %qT cannot be a member", ctype);
5803 error ("constructor for alien class %qT cannot be a member", ctype);
5809 /* Subroutine of `grokdeclarator'. */
5811 /* Generate errors possibly applicable for a given set of specifiers.
5812 This is for ARM $7.1.2. */
5815 bad_specifiers (tree object,
5824 error ("%qD declared as a %<virtual%> %s", object, type);
5826 error ("%qD declared as an %<inline%> %s", object, type);
5828 error ("%<const%> and %<volatile%> function specifiers on "
5829 "%qD invalid in %s declaration",
5832 error ("%q+D declared as a friend", object);
5834 && (TREE_CODE (object) == TYPE_DECL
5835 || (!TYPE_PTRFN_P (TREE_TYPE (object))
5836 && !TYPE_REFFN_P (TREE_TYPE (object))
5837 && !TYPE_PTRMEMFUNC_P (TREE_TYPE (object)))))
5838 error ("%q+D declared with an exception specification", object);
5841 /* DECL is a member function or static data member and is presently
5842 being defined. Check that the definition is taking place in a
5846 check_class_member_definition_namespace (tree decl)
5848 /* These checks only apply to member functions and static data
5850 gcc_assert (TREE_CODE (decl) == FUNCTION_DECL
5851 || TREE_CODE (decl) == VAR_DECL);
5852 /* We check for problems with specializations in pt.c in
5853 check_specialization_namespace, where we can issue better
5855 if (processing_specialization)
5857 /* There are no restrictions on the placement of
5858 explicit instantiations. */
5859 if (processing_explicit_instantiation)
5863 A member function definition that appears outside of the
5864 class definition shall appear in a namespace scope enclosing
5865 the class definition.
5869 The definition for a static data member shall appear in a
5870 namespace scope enclosing the member's class definition. */
5871 if (!is_ancestor (current_namespace, DECL_CONTEXT (decl)))
5872 pedwarn ("definition of %qD is not in namespace enclosing %qT",
5873 decl, DECL_CONTEXT (decl));
5876 /* Build a PARM_DECL for the "this" parameter. TYPE is the
5877 METHOD_TYPE for a non-static member function; QUALS are the
5878 cv-qualifiers that apply to the function. */
5881 build_this_parm (tree type, cp_cv_quals quals)
5886 cp_cv_quals this_quals;
5888 this_type = TREE_VALUE (TYPE_ARG_TYPES (type));
5889 /* The `this' parameter is implicitly `const'; it cannot be
5891 this_quals = (quals & TYPE_QUAL_RESTRICT) | TYPE_QUAL_CONST;
5892 qual_type = cp_build_qualified_type (this_type, this_quals);
5893 parm = build_artificial_parm (this_identifier, qual_type);
5894 cp_apply_type_quals_to_decl (this_quals, parm);
5898 /* CTYPE is class type, or null if non-class.
5899 TYPE is type this FUNCTION_DECL should have, either FUNCTION_TYPE
5901 DECLARATOR is the function's name.
5902 PARMS is a chain of PARM_DECLs for the function.
5903 VIRTUALP is truthvalue of whether the function is virtual or not.
5904 FLAGS are to be passed through to `grokclassfn'.
5905 QUALS are qualifiers indicating whether the function is `const'
5907 RAISES is a list of exceptions that this function can raise.
5908 CHECK is 1 if we must find this method in CTYPE, 0 if we should
5909 not look, and -1 if we should not call `grokclassfn' at all.
5911 SFK is the kind of special function (if any) for the new function.
5913 Returns `NULL_TREE' if something goes wrong, after issuing
5914 applicable error messages. */
5917 grokfndecl (tree ctype,
5921 tree orig_declarator,
5923 enum overload_flags flags,
5930 special_function_kind sfk,
5937 int staticp = ctype && TREE_CODE (type) == FUNCTION_TYPE;
5941 type = build_exception_variant (type, raises);
5943 decl = build_lang_decl (FUNCTION_DECL, declarator, type);
5944 if (TREE_CODE (type) == METHOD_TYPE)
5947 parm = build_this_parm (type, quals);
5948 TREE_CHAIN (parm) = parms;
5951 DECL_ARGUMENTS (decl) = parms;
5952 /* Propagate volatile out from type to decl. */
5953 if (TYPE_VOLATILE (type))
5954 TREE_THIS_VOLATILE (decl) = 1;
5957 && TREE_CODE (orig_declarator) == TEMPLATE_ID_EXPR)
5961 ("defining explicit specialization %qD in friend declaration",
5965 tree fns = TREE_OPERAND (orig_declarator, 0);
5966 tree args = TREE_OPERAND (orig_declarator, 1);
5968 if (PROCESSING_REAL_TEMPLATE_DECL_P ())
5970 /* Something like `template <class T> friend void f<T>()'. */
5971 error ("invalid use of template-id %qD in declaration "
5972 "of primary template",
5978 /* A friend declaration of the form friend void f<>(). Record
5979 the information in the TEMPLATE_ID_EXPR. */
5980 SET_DECL_IMPLICIT_INSTANTIATION (decl);
5982 if (TREE_CODE (fns) == COMPONENT_REF)
5984 /* Due to bison parser ickiness, we will have already looked
5985 up an operator_name or PFUNCNAME within the current class
5986 (see template_id in parse.y). If the current class contains
5987 such a name, we'll get a COMPONENT_REF here. Undo that. */
5989 gcc_assert (TREE_TYPE (TREE_OPERAND (fns, 0))
5990 == current_class_type);
5991 fns = TREE_OPERAND (fns, 1);
5993 gcc_assert (TREE_CODE (fns) == IDENTIFIER_NODE
5994 || TREE_CODE (fns) == OVERLOAD);
5995 DECL_TEMPLATE_INFO (decl) = tree_cons (fns, args, NULL_TREE);
5997 for (t = TYPE_ARG_TYPES (TREE_TYPE (decl)); t; t = TREE_CHAIN (t))
5998 if (TREE_PURPOSE (t)
5999 && TREE_CODE (TREE_PURPOSE (t)) == DEFAULT_ARG)
6001 error ("default arguments are not allowed in declaration "
6002 "of friend template specialization %qD",
6009 error ("%<inline%> is not allowed in declaration of friend "
6010 "template specialization %qD",
6017 /* If this decl has namespace scope, set that up. */
6019 set_decl_namespace (decl, in_namespace, friendp);
6021 DECL_CONTEXT (decl) = FROB_CONTEXT (current_namespace);
6023 /* `main' and builtins have implicit 'C' linkage. */
6024 if ((MAIN_NAME_P (declarator)
6025 || (IDENTIFIER_LENGTH (declarator) > 10
6026 && IDENTIFIER_POINTER (declarator)[0] == '_'
6027 && IDENTIFIER_POINTER (declarator)[1] == '_'
6028 && strncmp (IDENTIFIER_POINTER (declarator)+2, "builtin_", 8) == 0))
6029 && current_lang_name == lang_name_cplusplus
6030 && ctype == NULL_TREE
6031 /* NULL_TREE means global namespace. */
6032 && DECL_CONTEXT (decl) == NULL_TREE)
6033 SET_DECL_LANGUAGE (decl, lang_c);
6035 /* Should probably propagate const out from type to decl I bet (mrs). */
6038 DECL_STATIC_FUNCTION_P (decl) = 1;
6039 DECL_CONTEXT (decl) = ctype;
6044 DECL_CONTEXT (decl) = ctype;
6046 check_class_member_definition_namespace (decl);
6049 if (ctype == NULL_TREE && DECL_MAIN_P (decl))
6051 if (processing_template_decl)
6052 error ("cannot declare %<::main%> to be a template");
6054 error ("cannot declare %<::main%> to be inline");
6056 error ("cannot declare %<::main%> to be static");
6057 if (!same_type_p (TREE_TYPE (TREE_TYPE (decl)),
6060 tree oldtypeargs = TYPE_ARG_TYPES (TREE_TYPE (decl));
6062 error ("%<::main%> must return %<int%>");
6063 newtype = build_function_type (integer_type_node,
6065 TREE_TYPE (decl) = newtype;
6071 /* Members of anonymous types and local classes have no linkage; make
6072 them internal. If a typedef is made later, this will be changed. */
6073 if (ctype && (TYPE_ANONYMOUS_P (ctype)
6074 || decl_function_context (TYPE_MAIN_DECL (ctype))))
6079 /* [basic.link]: A name with no linkage (notably, the name of a class
6080 or enumeration declared in a local scope) shall not be used to
6081 declare an entity with linkage.
6083 Only check this for public decls for now. See core 319, 389. */
6084 t = no_linkage_check (TREE_TYPE (decl),
6085 /*relaxed_p=*/false);
6088 if (TYPE_ANONYMOUS_P (t))
6090 if (DECL_EXTERN_C_P (decl))
6091 /* Allow this; it's pretty common in C. */;
6094 pedwarn ("non-local function %q#D uses anonymous type",
6096 if (DECL_ORIGINAL_TYPE (TYPE_NAME (t)))
6097 pedwarn ("%q+#D does not refer to the unqualified "
6098 "type, so it is not used for linkage",
6103 pedwarn ("non-local function %q#D uses local type %qT", decl, t);
6107 TREE_PUBLIC (decl) = publicp;
6110 DECL_INTERFACE_KNOWN (decl) = 1;
6111 DECL_NOT_REALLY_EXTERN (decl) = 1;
6114 /* If the declaration was declared inline, mark it as such. */
6116 DECL_DECLARED_INLINE_P (decl) = 1;
6117 /* We inline functions that are explicitly declared inline, or, when
6118 the user explicitly asks us to, all functions. */
6119 if (DECL_DECLARED_INLINE_P (decl)
6120 || (flag_inline_trees == 2 && !DECL_INLINE (decl) && funcdef_flag))
6121 DECL_INLINE (decl) = 1;
6123 DECL_EXTERNAL (decl) = 1;
6124 if (quals && TREE_CODE (type) == FUNCTION_TYPE)
6126 error ("%smember function %qD cannot have cv-qualifier",
6127 (ctype ? "static " : "non-"), decl);
6128 quals = TYPE_UNQUALIFIED;
6131 if (IDENTIFIER_OPNAME_P (DECL_NAME (decl))
6132 && !grok_op_properties (decl, /*complain=*/true))
6135 if (ctype && decl_function_context (decl))
6136 DECL_NO_STATIC_CHAIN (decl) = 1;
6139 /* Make the init_value nonzero so pushdecl knows this is not
6140 tentative. error_mark_node is replaced later with the BLOCK. */
6141 DECL_INITIAL (decl) = error_mark_node;
6143 if (TYPE_NOTHROW_P (type) || nothrow_libfn_p (decl))
6144 TREE_NOTHROW (decl) = 1;
6146 /* Caller will do the rest of this. */
6150 if (ctype != NULL_TREE)
6152 if (sfk == sfk_constructor)
6153 DECL_CONSTRUCTOR_P (decl) = 1;
6155 grokclassfn (ctype, decl, flags);
6158 decl = check_explicit_specialization (orig_declarator, decl,
6161 4 * (friendp != 0));
6162 if (decl == error_mark_node)
6167 cplus_decl_attributes (&decl, *attrlist, 0);
6168 *attrlist = NULL_TREE;
6171 if (ctype != NULL_TREE
6172 && (! TYPE_FOR_JAVA (ctype) || check_java_method (decl))
6177 old_decl = check_classfn (ctype, decl,
6178 (processing_template_decl
6179 > template_class_depth (ctype))
6180 ? current_template_parms
6187 if (TREE_CODE (old_decl) == TEMPLATE_DECL)
6188 /* Because grokfndecl is always supposed to return a
6189 FUNCTION_DECL, we pull out the DECL_TEMPLATE_RESULT
6190 here. We depend on our callers to figure out that its
6191 really a template that's being returned. */
6192 old_decl = DECL_TEMPLATE_RESULT (old_decl);
6194 if (DECL_STATIC_FUNCTION_P (old_decl)
6195 && TREE_CODE (TREE_TYPE (decl)) == METHOD_TYPE)
6196 /* Remove the `this' parm added by grokclassfn.
6197 XXX Isn't this done in start_function, too? */
6198 revert_static_member_fn (decl);
6199 if (DECL_ARTIFICIAL (old_decl))
6200 error ("definition of implicitly-declared %qD", old_decl);
6202 /* Since we've smashed OLD_DECL to its
6203 DECL_TEMPLATE_RESULT, we must do the same to DECL. */
6204 if (TREE_CODE (decl) == TEMPLATE_DECL)
6205 decl = DECL_TEMPLATE_RESULT (decl);
6207 /* Attempt to merge the declarations. This can fail, in
6208 the case of some invalid specialization declarations. */
6209 pushed_scope = push_scope (ctype);
6210 ok = duplicate_decls (decl, old_decl, friendp);
6212 pop_scope (pushed_scope);
6215 error ("no %q#D member function declared in class %qT",
6223 if (DECL_CONSTRUCTOR_P (decl) && !grok_ctor_properties (ctype, decl))
6226 if (ctype == NULL_TREE || check)
6230 DECL_VIRTUAL_P (decl) = 1;
6235 /* DECL is a VAR_DECL for a static data member. Set flags to reflect
6236 the linkage that DECL will receive in the object file. */
6239 set_linkage_for_static_data_member (tree decl)
6241 /* A static data member always has static storage duration and
6242 external linkage. Note that static data members are forbidden in
6243 local classes -- the only situation in which a class has
6244 non-external linkage. */
6245 TREE_PUBLIC (decl) = 1;
6246 TREE_STATIC (decl) = 1;
6247 /* For non-template classes, static data members are always put
6248 out in exactly those files where they are defined, just as
6249 with ordinary namespace-scope variables. */
6250 if (!processing_template_decl)
6251 DECL_INTERFACE_KNOWN (decl) = 1;
6254 /* Create a VAR_DECL named NAME with the indicated TYPE.
6256 If SCOPE is non-NULL, it is the class type or namespace containing
6257 the variable. If SCOPE is NULL, the variable should is created in
6258 the innermost enclosings scope. */
6261 grokvardecl (tree type,
6263 const cp_decl_specifier_seq *declspecs,
6269 tree explicit_scope;
6271 gcc_assert (!name || TREE_CODE (name) == IDENTIFIER_NODE);
6273 /* Compute the scope in which to place the variable, but remember
6274 whether or not that scope was explicitly specified by the user. */
6275 explicit_scope = scope;
6278 /* An explicit "extern" specifier indicates a namespace-scope
6280 if (declspecs->storage_class == sc_extern)
6281 scope = current_namespace;
6282 else if (!at_function_scope_p ())
6283 scope = current_scope ();
6287 && (/* If the variable is a namespace-scope variable declared in a
6288 template, we need DECL_LANG_SPECIFIC. */
6289 (TREE_CODE (scope) == NAMESPACE_DECL && processing_template_decl)
6290 /* Similarly for namespace-scope variables with language linkage
6292 || (TREE_CODE (scope) == NAMESPACE_DECL
6293 && current_lang_name != lang_name_cplusplus)
6294 /* Similarly for static data members. */
6296 decl = build_lang_decl (VAR_DECL, name, type);
6298 decl = build_decl (VAR_DECL, name, type);
6300 if (explicit_scope && TREE_CODE (explicit_scope) == NAMESPACE_DECL)
6301 set_decl_namespace (decl, explicit_scope, 0);
6303 DECL_CONTEXT (decl) = FROB_CONTEXT (scope);
6305 if (declspecs->storage_class == sc_extern)
6307 DECL_THIS_EXTERN (decl) = 1;
6308 DECL_EXTERNAL (decl) = !initialized;
6311 if (DECL_CLASS_SCOPE_P (decl))
6313 set_linkage_for_static_data_member (decl);
6314 /* This function is only called with out-of-class definitions. */
6315 DECL_EXTERNAL (decl) = 0;
6316 check_class_member_definition_namespace (decl);
6318 /* At top level, either `static' or no s.c. makes a definition
6319 (perhaps tentative), and absence of `static' makes it public. */
6320 else if (toplevel_bindings_p ())
6322 TREE_PUBLIC (decl) = (declspecs->storage_class != sc_static
6323 && (DECL_THIS_EXTERN (decl) || ! constp));
6324 TREE_STATIC (decl) = ! DECL_EXTERNAL (decl);
6326 /* Not at top level, only `static' makes a static definition. */
6329 TREE_STATIC (decl) = declspecs->storage_class == sc_static;
6330 TREE_PUBLIC (decl) = DECL_EXTERNAL (decl);
6333 if (declspecs->specs[(int)ds_thread])
6335 if (targetm.have_tls)
6336 DECL_TLS_MODEL (decl) = decl_default_tls_model (decl);
6338 /* A mere warning is sure to result in improper semantics
6339 at runtime. Don't bother to allow this to compile. */
6340 error ("thread-local storage not supported for this target");
6343 if (TREE_PUBLIC (decl))
6345 /* [basic.link]: A name with no linkage (notably, the name of a class
6346 or enumeration declared in a local scope) shall not be used to
6347 declare an entity with linkage.
6349 Only check this for public decls for now. */
6350 tree t = no_linkage_check (TREE_TYPE (decl), /*relaxed_p=*/false);
6353 if (TYPE_ANONYMOUS_P (t))
6355 if (DECL_EXTERN_C_P (decl))
6356 /* Allow this; it's pretty common in C. */
6360 /* DRs 132, 319 and 389 seem to indicate types with
6361 no linkage can only be used to declare extern "C"
6362 entities. Since it's not always an error in the
6363 ISO C++ 90 Standard, we only issue a warning. */
6364 warning (0, "non-local variable %q#D uses anonymous type",
6366 if (DECL_ORIGINAL_TYPE (TYPE_NAME (t)))
6367 warning (0, "%q+#D does not refer to the unqualified "
6368 "type, so it is not used for linkage",
6373 warning (0, "non-local variable %q#D uses local type %qT", decl, t);
6377 DECL_INTERFACE_KNOWN (decl) = 1;
6382 /* Create and return a canonical pointer to member function type, for
6383 TYPE, which is a POINTER_TYPE to a METHOD_TYPE. */
6386 build_ptrmemfunc_type (tree type)
6390 tree unqualified_variant = NULL_TREE;
6392 if (type == error_mark_node)
6395 /* If a canonical type already exists for this type, use it. We use
6396 this method instead of type_hash_canon, because it only does a
6397 simple equality check on the list of field members. */
6399 if ((t = TYPE_GET_PTRMEMFUNC_TYPE (type)))
6402 /* Make sure that we always have the unqualified pointer-to-member
6404 if (cp_type_quals (type) != TYPE_UNQUALIFIED)
6406 = build_ptrmemfunc_type (TYPE_MAIN_VARIANT (type));
6408 t = make_aggr_type (RECORD_TYPE);
6409 xref_basetypes (t, NULL_TREE);
6411 /* Let the front-end know this is a pointer to member function... */
6412 TYPE_PTRMEMFUNC_FLAG (t) = 1;
6413 /* ... and not really an aggregate. */
6414 SET_IS_AGGR_TYPE (t, 0);
6416 field = build_decl (FIELD_DECL, pfn_identifier, type);
6419 field = build_decl (FIELD_DECL, delta_identifier, delta_type_node);
6420 TREE_CHAIN (field) = fields;
6423 finish_builtin_struct (t, "__ptrmemfunc_type", fields, ptr_type_node);
6425 /* Zap out the name so that the back-end will give us the debugging
6426 information for this anonymous RECORD_TYPE. */
6427 TYPE_NAME (t) = NULL_TREE;
6429 /* If this is not the unqualified form of this pointer-to-member
6430 type, set the TYPE_MAIN_VARIANT for this type to be the
6431 unqualified type. Since they are actually RECORD_TYPEs that are
6432 not variants of each other, we must do this manually. */
6433 if (cp_type_quals (type) != TYPE_UNQUALIFIED)
6435 t = build_qualified_type (t, cp_type_quals (type));
6436 TYPE_MAIN_VARIANT (t) = unqualified_variant;
6437 TYPE_NEXT_VARIANT (t) = TYPE_NEXT_VARIANT (unqualified_variant);
6438 TYPE_NEXT_VARIANT (unqualified_variant) = t;
6441 /* Cache this pointer-to-member type so that we can find it again
6443 TYPE_SET_PTRMEMFUNC_TYPE (type, t);
6448 /* Create and return a pointer to data member type. */
6451 build_ptrmem_type (tree class_type, tree member_type)
6453 if (TREE_CODE (member_type) == METHOD_TYPE)
6457 arg_types = TYPE_ARG_TYPES (member_type);
6458 class_type = (cp_build_qualified_type
6460 cp_type_quals (TREE_TYPE (TREE_VALUE (arg_types)))));
6462 = build_method_type_directly (class_type,
6463 TREE_TYPE (member_type),
6464 TREE_CHAIN (arg_types));
6465 return build_ptrmemfunc_type (build_pointer_type (member_type));
6469 gcc_assert (TREE_CODE (member_type) != FUNCTION_TYPE);
6470 return build_offset_type (class_type, member_type);
6474 /* DECL is a VAR_DECL defined in-class, whose TYPE is also given.
6475 Check to see that the definition is valid. Issue appropriate error
6476 messages. Return 1 if the definition is particularly bad, or 0
6480 check_static_variable_definition (tree decl, tree type)
6482 /* Motion 10 at San Diego: If a static const integral data member is
6483 initialized with an integral constant expression, the initializer
6484 may appear either in the declaration (within the class), or in
6485 the definition, but not both. If it appears in the class, the
6486 member is a member constant. The file-scope definition is always
6488 if (!ARITHMETIC_TYPE_P (type) && TREE_CODE (type) != ENUMERAL_TYPE)
6490 error ("invalid in-class initialization of static data member "
6491 "of non-integral type %qT",
6493 /* If we just return the declaration, crashes will sometimes
6494 occur. We therefore return void_type_node, as if this were a
6495 friend declaration, to cause callers to completely ignore
6496 this declaration. */
6499 else if (!CP_TYPE_CONST_P (type))
6500 error ("ISO C++ forbids in-class initialization of non-const "
6501 "static member %qD",
6503 else if (pedantic && !INTEGRAL_TYPE_P (type))
6504 pedwarn ("ISO C++ forbids initialization of member constant "
6505 "%qD of non-integral type %qT", decl, type);
6510 /* Given the SIZE (i.e., number of elements) in an array, compute an
6511 appropriate index type for the array. If non-NULL, NAME is the
6512 name of the thing being declared. */
6515 compute_array_index_type (tree name, tree size)
6520 if (error_operand_p (size))
6521 return error_mark_node;
6523 type = TREE_TYPE (size);
6524 /* The array bound must be an integer type. */
6525 if (!dependent_type_p (type) && !INTEGRAL_TYPE_P (type))
6528 error ("size of array %qD has non-integral type %qT", name, type);
6530 error ("size of array has non-integral type %qT", type);
6531 size = integer_one_node;
6532 type = TREE_TYPE (size);
6535 if (abi_version_at_least (2)
6536 /* We should only handle value dependent expressions specially. */
6537 ? value_dependent_expression_p (size)
6538 /* But for abi-1, we handled all instances in templates. This
6539 effects the manglings produced. */
6540 : processing_template_decl)
6541 return build_index_type (build_min (MINUS_EXPR, sizetype,
6542 size, integer_one_node));
6544 /* The size might be the result of a cast. */
6545 STRIP_TYPE_NOPS (size);
6547 /* It might be a const variable or enumeration constant. */
6548 size = integral_constant_value (size);
6550 /* Normally, the array-bound will be a constant. */
6551 if (TREE_CODE (size) == INTEGER_CST)
6553 /* Check to see if the array bound overflowed. Make that an
6554 error, no matter how generous we're being. */
6555 int old_flag_pedantic_errors = flag_pedantic_errors;
6556 int old_pedantic = pedantic;
6557 pedantic = flag_pedantic_errors = 1;
6558 constant_expression_warning (size);
6559 pedantic = old_pedantic;
6560 flag_pedantic_errors = old_flag_pedantic_errors;
6562 /* An array must have a positive number of elements. */
6563 if (INT_CST_LT (size, integer_zero_node))
6566 error ("size of array %qD is negative", name);
6568 error ("size of array is negative");
6569 size = integer_one_node;
6571 /* As an extension we allow zero-sized arrays. We always allow
6572 them in system headers because glibc uses them. */
6573 else if (integer_zerop (size) && pedantic && !in_system_header)
6576 pedwarn ("ISO C++ forbids zero-size array %qD", name);
6578 pedwarn ("ISO C++ forbids zero-size array");
6581 else if (TREE_CONSTANT (size))
6583 /* `(int) &fn' is not a valid array bound. */
6585 error ("size of array %qD is not an integral constant-expression",
6588 error ("size of array is not an integral constant-expression");
6589 size = integer_one_node;
6594 pedwarn ("ISO C++ forbids variable-size array %qD", name);
6596 pedwarn ("ISO C++ forbids variable-size array");
6599 if (processing_template_decl && !TREE_CONSTANT (size))
6600 /* A variable sized array. */
6601 itype = build_min (MINUS_EXPR, sizetype, size, integer_one_node);
6604 HOST_WIDE_INT saved_processing_template_decl;
6606 /* Compute the index of the largest element in the array. It is
6607 one less than the number of elements in the array. We save
6608 and restore PROCESSING_TEMPLATE_DECL so that computations in
6609 cp_build_binary_op will be appropriately folded. */
6610 saved_processing_template_decl = processing_template_decl;
6611 processing_template_decl = 0;
6612 itype = cp_build_binary_op (MINUS_EXPR,
6613 cp_convert (ssizetype, size),
6614 cp_convert (ssizetype, integer_one_node));
6615 itype = fold (itype);
6616 processing_template_decl = saved_processing_template_decl;
6618 if (!TREE_CONSTANT (itype))
6619 /* A variable sized array. */
6620 itype = variable_size (itype);
6621 /* Make sure that there was no overflow when creating to a signed
6622 index type. (For example, on a 32-bit machine, an array with
6623 size 2^32 - 1 is too big.) */
6624 else if (TREE_CODE (itype) == INTEGER_CST
6625 && TREE_OVERFLOW (itype))
6627 error ("overflow in array dimension");
6628 TREE_OVERFLOW (itype) = 0;
6632 /* Create and return the appropriate index type. */
6633 return build_index_type (itype);
6636 /* Returns the scope (if any) in which the entity declared by
6637 DECLARATOR will be located. If the entity was declared with an
6638 unqualified name, NULL_TREE is returned. */
6641 get_scope_of_declarator (const cp_declarator *declarator)
6643 while (declarator && declarator->kind != cdk_id)
6644 declarator = declarator->declarator;
6646 /* If the declarator-id is a SCOPE_REF, the scope in which the
6647 declaration occurs is the first operand. */
6649 && declarator->u.id.qualifying_scope)
6650 return declarator->u.id.qualifying_scope;
6652 /* Otherwise, the declarator is not a qualified name; the entity will
6653 be declared in the current scope. */
6657 /* Returns an ARRAY_TYPE for an array with SIZE elements of the
6658 indicated TYPE. If non-NULL, NAME is the NAME of the declaration
6662 create_array_type_for_decl (tree name, tree type, tree size)
6664 tree itype = NULL_TREE;
6665 const char* error_msg;
6667 /* If things have already gone awry, bail now. */
6668 if (type == error_mark_node || size == error_mark_node)
6669 return error_mark_node;
6671 /* Assume that everything will go OK. */
6674 /* There are some types which cannot be array elements. */
6675 switch (TREE_CODE (type))
6678 error_msg = "array of void";
6682 error_msg = "array of functions";
6685 case REFERENCE_TYPE:
6686 error_msg = "array of references";
6690 error_msg = "array of function members";
6697 /* If something went wrong, issue an error-message and return. */
6701 error ("declaration of %qD as %s", name, error_msg);
6703 error ("creating %s", error_msg);
6705 return error_mark_node;
6710 The constant expressions that specify the bounds of the arrays
6711 can be omitted only for the first member of the sequence. */
6712 if (TREE_CODE (type) == ARRAY_TYPE && !TYPE_DOMAIN (type))
6715 error ("declaration of %qD as multidimensional array must "
6716 "have bounds for all dimensions except the first",
6719 error ("multidimensional array must have bounds for all "
6720 "dimensions except the first");
6722 return error_mark_node;
6725 /* Figure out the index type for the array. */
6727 itype = compute_array_index_type (name, size);
6730 T is called the array element type; this type shall not be [...] an
6731 abstract class type. */
6732 abstract_virtuals_error (name, type);
6734 return build_cplus_array_type (type, itype);
6737 /* Check that it's OK to declare a function with the indicated TYPE.
6738 SFK indicates the kind of special function (if any) that this
6739 function is. OPTYPE is the type given in a conversion operator
6740 declaration, or the class type for a constructor/destructor.
6741 Returns the actual return type of the function; that
6742 may be different than TYPE if an error occurs, or for certain
6743 special functions. */
6746 check_special_function_return_type (special_function_kind sfk,
6752 case sfk_constructor:
6754 error ("return type specification for constructor invalid");
6756 if (targetm.cxx.cdtor_returns_this () && !TYPE_FOR_JAVA (optype))
6757 type = build_pointer_type (optype);
6759 type = void_type_node;
6762 case sfk_destructor:
6764 error ("return type specification for destructor invalid");
6765 /* We can't use the proper return type here because we run into
6766 problems with ambiguous bases and covariant returns.
6767 Java classes are left unchanged because (void *) isn't a valid
6768 Java type, and we don't want to change the Java ABI. */
6769 if (targetm.cxx.cdtor_returns_this () && !TYPE_FOR_JAVA (optype))
6770 type = build_pointer_type (void_type_node);
6772 type = void_type_node;
6775 case sfk_conversion:
6776 if (type && !same_type_p (type, optype))
6777 error ("operator %qT declared to return %qT", optype, type);
6779 pedwarn ("return type specified for %<operator %T%>", optype);
6790 /* A variable or data member (whose unqualified name is IDENTIFIER)
6791 has been declared with the indicated TYPE. If the TYPE is not
6792 acceptable, issue an error message and return a type to use for
6793 error-recovery purposes. */
6796 check_var_type (tree identifier, tree type)
6798 if (VOID_TYPE_P (type))
6801 error ("unnamed variable or field declared void");
6802 else if (TREE_CODE (identifier) == IDENTIFIER_NODE)
6804 gcc_assert (!IDENTIFIER_OPNAME_P (identifier));
6805 error ("variable or field %qE declared void", identifier);
6808 error ("variable or field declared void");
6809 type = error_mark_node;
6815 /* Given declspecs and a declarator (abstract or otherwise), determine
6816 the name and type of the object declared and construct a DECL node
6819 DECLSPECS is a chain of tree_list nodes whose value fields
6820 are the storage classes and type specifiers.
6822 DECL_CONTEXT says which syntactic context this declaration is in:
6823 NORMAL for most contexts. Make a VAR_DECL or FUNCTION_DECL or TYPE_DECL.
6824 FUNCDEF for a function definition. Like NORMAL but a few different
6825 error messages in each case. Return value may be zero meaning
6826 this definition is too screwy to try to parse.
6827 MEMFUNCDEF for a function definition. Like FUNCDEF but prepares to
6828 handle member functions (which have FIELD context).
6829 Return value may be zero meaning this definition is too screwy to
6831 PARM for a parameter declaration (either within a function prototype
6832 or before a function body). Make a PARM_DECL, or return void_type_node.
6833 CATCHPARM for a parameter declaration before a catch clause.
6834 TYPENAME if for a typename (in a cast or sizeof).
6835 Don't make a DECL node; just return the ..._TYPE node.
6836 FIELD for a struct or union field; make a FIELD_DECL.
6837 BITFIELD for a field with specified width.
6838 INITIALIZED is 1 if the decl has an initializer.
6840 ATTRLIST is a pointer to the list of attributes, which may be NULL
6841 if there are none; *ATTRLIST may be modified if attributes from inside
6842 the declarator should be applied to the declaration.
6844 When this function is called, scoping variables (such as
6845 CURRENT_CLASS_TYPE) should reflect the scope in which the
6846 declaration occurs, not the scope in which the new declaration will
6847 be placed. For example, on:
6851 when grokdeclarator is called for `S::f', the CURRENT_CLASS_TYPE
6854 Returns a DECL (if a declarator is present), a TYPE (if there is no
6855 declarator, in cases like "struct S;"), or the ERROR_MARK_NODE if an
6859 grokdeclarator (const cp_declarator *declarator,
6860 const cp_decl_specifier_seq *declspecs,
6861 enum decl_context decl_context,
6865 tree type = NULL_TREE;
6867 int virtualp, explicitp, friendp, inlinep, staticp;
6868 int explicit_int = 0;
6869 int explicit_char = 0;
6870 int defaulted_int = 0;
6871 tree dependent_name = NULL_TREE;
6873 tree typedef_decl = NULL_TREE;
6874 const char *name = NULL;
6875 tree typedef_type = NULL_TREE;
6876 /* True if this declarator is a function definition. */
6877 bool funcdef_flag = false;
6878 cp_declarator_kind innermost_code = cdk_error;
6881 /* See the code below that used this. */
6882 tree decl_attr = NULL_TREE;
6885 /* Keep track of what sort of function is being processed
6886 so that we can warn about default return values, or explicit
6887 return values which do not match prescribed defaults. */
6888 special_function_kind sfk = sfk_none;
6890 tree dname = NULL_TREE;
6891 tree ctor_return_type = NULL_TREE;
6892 enum overload_flags flags = NO_SPECIAL;
6893 /* cv-qualifiers that apply to the declarator, for a declaration of
6894 a member function. */
6895 cp_cv_quals memfn_quals = TYPE_UNQUALIFIED;
6896 /* cv-qualifiers that apply to the type specified by the DECLSPECS. */
6898 tree raises = NULL_TREE;
6899 int template_count = 0;
6900 tree returned_attrs = NULL_TREE;
6901 tree parms = NULL_TREE;
6902 const cp_declarator *id_declarator;
6903 /* The unqualified name of the declarator; either an
6904 IDENTIFIER_NODE, BIT_NOT_EXPR, or TEMPLATE_ID_EXPR. */
6905 tree unqualified_id;
6906 /* The class type, if any, in which this entity is located,
6907 or NULL_TREE if none. Note that this value may be different from
6908 the current class type; for example if an attempt is made to declare
6909 "A::f" inside "B", this value will be "A". */
6910 tree ctype = current_class_type;
6911 /* The NAMESPACE_DECL for the namespace in which this entity is
6912 located. If an unqualified name is used to declare the entity,
6913 this value will be NULL_TREE, even if the entity is located at
6915 tree in_namespace = NULL_TREE;
6916 cp_storage_class storage_class;
6917 bool unsigned_p, signed_p, short_p, long_p, thread_p;
6918 bool type_was_error_mark_node = false;
6920 signed_p = declspecs->specs[(int)ds_signed];
6921 unsigned_p = declspecs->specs[(int)ds_unsigned];
6922 short_p = declspecs->specs[(int)ds_short];
6923 long_p = declspecs->specs[(int)ds_long];
6924 longlong = declspecs->specs[(int)ds_long] >= 2;
6925 thread_p = declspecs->specs[(int)ds_thread];
6927 if (decl_context == FUNCDEF)
6928 funcdef_flag = true, decl_context = NORMAL;
6929 else if (decl_context == MEMFUNCDEF)
6930 funcdef_flag = true, decl_context = FIELD;
6931 else if (decl_context == BITFIELD)
6932 bitfield = 1, decl_context = FIELD;
6934 /* Look inside a declarator for the name being declared
6935 and get it as a string, for an error message. */
6936 for (id_declarator = declarator;
6938 id_declarator = id_declarator->declarator)
6940 if (id_declarator->kind != cdk_id)
6941 innermost_code = id_declarator->kind;
6943 switch (id_declarator->kind)
6946 if (id_declarator->declarator
6947 && id_declarator->declarator->kind == cdk_id)
6949 sfk = id_declarator->declarator->u.id.sfk;
6950 if (sfk == sfk_destructor)
6957 tree qualifying_scope = id_declarator->u.id.qualifying_scope;
6958 tree decl = id_declarator->u.id.unqualified_name;
6961 if (qualifying_scope)
6963 if (at_function_scope_p ())
6967 A declarator-id shall not be qualified except
6970 None of the cases are permitted in block
6972 if (qualifying_scope == global_namespace)
6973 error ("invalid use of qualified-name %<::%D%>",
6975 else if (TYPE_P (qualifying_scope))
6976 error ("invalid use of qualified-name %<%T::%D%>",
6977 qualifying_scope, decl);
6979 error ("invalid use of qualified-name %<%D::%D%>",
6980 qualifying_scope, decl);
6981 return error_mark_node;
6983 else if (TYPE_P (qualifying_scope))
6985 ctype = qualifying_scope;
6986 if (innermost_code != cdk_function
6987 && current_class_type
6988 && !UNIQUELY_DERIVED_FROM_P (ctype,
6989 current_class_type))
6991 error ("type %qT is not derived from type %qT",
6992 ctype, current_class_type);
6993 return error_mark_node;
6996 else if (TREE_CODE (qualifying_scope) == NAMESPACE_DECL)
6997 in_namespace = qualifying_scope;
6999 switch (TREE_CODE (decl))
7005 if (innermost_code != cdk_function)
7007 error ("declaration of %qD as non-function", decl);
7008 return error_mark_node;
7010 else if (!qualifying_scope
7011 && !(current_class_type && at_class_scope_p ()))
7013 error ("declaration of %qD as non-member", decl);
7014 return error_mark_node;
7017 type = TREE_OPERAND (decl, 0);
7018 name = IDENTIFIER_POINTER (constructor_name (type));
7023 case TEMPLATE_ID_EXPR:
7025 tree fns = TREE_OPERAND (decl, 0);
7028 if (TREE_CODE (dname) != IDENTIFIER_NODE)
7030 gcc_assert (is_overloaded_fn (dname));
7031 dname = DECL_NAME (get_first_fn (dname));
7036 case IDENTIFIER_NODE:
7037 if (TREE_CODE (decl) == IDENTIFIER_NODE)
7040 if (C_IS_RESERVED_WORD (dname))
7042 error ("declarator-id missing; using reserved word %qD",
7044 name = IDENTIFIER_POINTER (dname);
7046 else if (!IDENTIFIER_TYPENAME_P (dname))
7047 name = IDENTIFIER_POINTER (dname);
7050 gcc_assert (flags == NO_SPECIAL);
7051 flags = TYPENAME_FLAG;
7052 ctor_return_type = TREE_TYPE (dname);
7053 sfk = sfk_conversion;
7054 if (is_typename_at_global_scope (dname))
7055 name = IDENTIFIER_POINTER (dname);
7057 name = "<invalid operator>";
7073 return error_mark_node;
7079 if (id_declarator->kind == cdk_id)
7085 The declarator in a function-definition shall have the form
7086 D1 ( parameter-declaration-clause) ... */
7087 if (funcdef_flag && innermost_code != cdk_function)
7089 error ("function definition does not declare parameters");
7090 return error_mark_node;
7093 if (((dname && IDENTIFIER_OPNAME_P (dname)) || flags == TYPENAME_FLAG)
7094 && innermost_code != cdk_function
7095 && ! (ctype && !declspecs->any_specifiers_p))
7097 error ("declaration of %qD as non-function", dname);
7098 return error_mark_node;
7101 /* Anything declared one level down from the top level
7102 must be one of the parameters of a function
7103 (because the body is at least two levels down). */
7105 /* This heuristic cannot be applied to C++ nodes! Fixed, however,
7106 by not allowing C++ class definitions to specify their parameters
7107 with xdecls (must be spec.d in the parmlist).
7109 Since we now wait to push a class scope until we are sure that
7110 we are in a legitimate method context, we must set oldcname
7111 explicitly (since current_class_name is not yet alive).
7113 We also want to avoid calling this a PARM if it is in a namespace. */
7115 if (decl_context == NORMAL && !toplevel_bindings_p ())
7117 struct cp_binding_level *b = current_binding_level;
7118 current_binding_level = b->level_chain;
7119 if (current_binding_level != 0 && toplevel_bindings_p ())
7120 decl_context = PARM;
7121 current_binding_level = b;
7125 name = decl_context == PARM ? "parameter" : "type name";
7127 /* If there were multiple types specified in the decl-specifier-seq,
7128 issue an error message. */
7129 if (declspecs->multiple_types_p)
7131 error ("two or more data types in declaration of %qs", name);
7132 return error_mark_node;
7135 /* Extract the basic type from the decl-specifier-seq. */
7136 type = declspecs->type;
7137 if (type == error_mark_node)
7140 type_was_error_mark_node = true;
7142 /* If the entire declaration is itself tagged as deprecated then
7143 suppress reports of deprecated items. */
7144 if (type && TREE_DEPRECATED (type)
7145 && deprecated_state != DEPRECATED_SUPPRESS)
7146 warn_deprecated_use (type);
7147 if (type && TREE_CODE (type) == TYPE_DECL)
7149 typedef_decl = type;
7150 type = TREE_TYPE (typedef_decl);
7152 /* No type at all: default to `int', and set DEFAULTED_INT
7153 because it was not a user-defined typedef. */
7154 if (type == NULL_TREE && (signed_p || unsigned_p || long_p || short_p))
7156 /* These imply 'int'. */
7157 type = integer_type_node;
7161 explicit_int = declspecs->explicit_int_p;
7162 explicit_char = declspecs->explicit_char_p;
7165 /* See the code below that used this. */
7167 decl_attr = DECL_ATTRIBUTES (typedef_decl);
7169 typedef_type = type;
7172 if (sfk != sfk_conversion)
7173 ctor_return_type = ctype;
7175 if (sfk != sfk_none)
7176 type = check_special_function_return_type (sfk, type,
7178 else if (type == NULL_TREE)
7184 /* We handle `main' specially here, because 'main () { }' is so
7185 common. With no options, it is allowed. With -Wreturn-type,
7186 it is a warning. It is only an error with -pedantic-errors. */
7187 is_main = (funcdef_flag
7188 && dname && MAIN_NAME_P (dname)
7189 && ctype == NULL_TREE
7190 && in_namespace == NULL_TREE
7191 && current_namespace == global_namespace);
7193 if (type_was_error_mark_node)
7194 /* We've already issued an error, don't complain more. */;
7195 else if (in_system_header || flag_ms_extensions)
7196 /* Allow it, sigh. */;
7197 else if (pedantic || ! is_main)
7198 pedwarn ("ISO C++ forbids declaration of %qs with no type", name);
7199 else if (warn_return_type)
7200 warning (0, "ISO C++ forbids declaration of %qs with no type", name);
7202 type = integer_type_node;
7207 /* Now process the modifiers that were specified
7208 and check for invalid combinations. */
7210 /* Long double is a special combination. */
7211 if (long_p && !longlong && TYPE_MAIN_VARIANT (type) == double_type_node)
7214 type = build_qualified_type (long_double_type_node,
7215 cp_type_quals (type));
7218 /* Check all other uses of type modifiers. */
7220 if (unsigned_p || signed_p || long_p || short_p)
7224 if ((signed_p || unsigned_p) && TREE_CODE (type) != INTEGER_TYPE)
7225 error ("%<signed%> or %<unsigned%> invalid for %qs", name);
7226 else if (signed_p && unsigned_p)
7227 error ("%<signed%> and %<unsigned%> specified together for %qs", name);
7228 else if (longlong && TREE_CODE (type) != INTEGER_TYPE)
7229 error ("%<long long%> invalid for %qs", name);
7230 else if (long_p && TREE_CODE (type) == REAL_TYPE)
7231 error ("%<long%> invalid for %qs", name);
7232 else if (short_p && TREE_CODE (type) == REAL_TYPE)
7233 error ("%<short%> invalid for %qs", name);
7234 else if ((long_p || short_p) && TREE_CODE (type) != INTEGER_TYPE)
7235 error ("%<long%> or %<short%> invalid for %qs", name);
7236 else if ((long_p || short_p) && explicit_char)
7237 error ("%<long%> or %<short%> specified with char for %qs", name);
7238 else if (long_p && short_p)
7239 error ("%<long%> and %<short%> specified together for %qs", name);
7243 if (!explicit_int && !defaulted_int && !explicit_char && pedantic)
7245 pedwarn ("long, short, signed or unsigned used invalidly for %qs",
7247 if (flag_pedantic_errors)
7252 /* Discard the type modifiers if they are invalid. */
7263 /* Decide whether an integer type is signed or not.
7264 Optionally treat bitfields as signed by default. */
7268 It is implementation-defined whether a plain (neither
7269 explicitly signed or unsigned) char, short, int, or long
7270 bit-field is signed or unsigned.
7272 Naturally, we extend this to long long as well. Note that
7273 this does not include wchar_t. */
7274 || (bitfield && !flag_signed_bitfields
7276 /* A typedef for plain `int' without `signed' can be
7277 controlled just like plain `int', but a typedef for
7278 `signed int' cannot be so controlled. */
7280 && C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl))
7281 && TREE_CODE (type) == INTEGER_TYPE
7282 && !same_type_p (TYPE_MAIN_VARIANT (type), wchar_type_node)))
7285 type = long_long_unsigned_type_node;
7287 type = long_unsigned_type_node;
7289 type = short_unsigned_type_node;
7290 else if (type == char_type_node)
7291 type = unsigned_char_type_node;
7292 else if (typedef_decl)
7293 type = c_common_unsigned_type (type);
7295 type = unsigned_type_node;
7297 else if (signed_p && type == char_type_node)
7298 type = signed_char_type_node;
7300 type = long_long_integer_type_node;
7302 type = long_integer_type_node;
7304 type = short_integer_type_node;
7306 if (declspecs->specs[(int)ds_complex])
7308 if (TREE_CODE (type) != INTEGER_TYPE && TREE_CODE (type) != REAL_TYPE)
7309 error ("complex invalid for %qs", name);
7310 /* If we just have "complex", it is equivalent to
7311 "complex double", but if any modifiers at all are specified it is
7312 the complex form of TYPE. E.g, "complex short" is
7313 "complex short int". */
7315 else if (defaulted_int && ! longlong
7316 && ! (long_p || short_p || signed_p || unsigned_p))
7317 type = complex_double_type_node;
7318 else if (type == integer_type_node)
7319 type = complex_integer_type_node;
7320 else if (type == float_type_node)
7321 type = complex_float_type_node;
7322 else if (type == double_type_node)
7323 type = complex_double_type_node;
7324 else if (type == long_double_type_node)
7325 type = complex_long_double_type_node;
7327 type = build_complex_type (type);
7330 type_quals = TYPE_UNQUALIFIED;
7331 if (declspecs->specs[(int)ds_const])
7332 type_quals |= TYPE_QUAL_CONST;
7333 if (declspecs->specs[(int)ds_volatile])
7334 type_quals |= TYPE_QUAL_VOLATILE;
7335 if (declspecs->specs[(int)ds_restrict])
7336 type_quals |= TYPE_QUAL_RESTRICT;
7337 if (sfk == sfk_conversion && type_quals != TYPE_UNQUALIFIED)
7338 error ("qualifiers are not allowed on declaration of %<operator %T%>",
7341 if (TREE_CODE (type) == FUNCTION_TYPE
7342 && type_quals != TYPE_UNQUALIFIED)
7344 /* This was an error in C++98 (cv-qualifiers cannot be added to
7345 a function type), but DR 295 makes the code well-formed by
7346 dropping the extra qualifiers. */
7349 tree bad_type = build_qualified_type (type, type_quals);
7350 pedwarn ("ignoring %qV qualifiers added to function type %qT",
7353 type_quals = TYPE_UNQUALIFIED;
7355 type_quals |= cp_type_quals (type);
7356 type = cp_build_qualified_type_real
7357 (type, type_quals, ((typedef_decl && !DECL_ARTIFICIAL (typedef_decl)
7358 ? tf_ignore_bad_quals : 0) | tf_warning_or_error));
7359 /* We might have ignored or rejected some of the qualifiers. */
7360 type_quals = cp_type_quals (type);
7363 inlinep = !! declspecs->specs[(int)ds_inline];
7364 virtualp = !! declspecs->specs[(int)ds_virtual];
7365 explicitp = !! declspecs->specs[(int)ds_explicit];
7367 storage_class = declspecs->storage_class;
7368 if (storage_class == sc_static)
7369 staticp = 1 + (decl_context == FIELD);
7371 if (virtualp && staticp == 2)
7373 error ("member %qD cannot be declared both virtual and static", dname);
7374 storage_class = sc_none;
7377 friendp = !! declspecs->specs[(int)ds_friend];
7379 if (dependent_name && !friendp)
7381 error ("%<%T::%D%> is not a valid declarator", ctype, dependent_name);
7382 return error_mark_node;
7385 /* Issue errors about use of storage classes for parameters. */
7386 if (decl_context == PARM)
7388 if (declspecs->specs[(int)ds_typedef])
7390 error ("typedef declaration invalid in parameter declaration");
7391 return error_mark_node;
7393 else if (storage_class == sc_static
7394 || storage_class == sc_extern
7396 error ("storage class specifiers invalid in parameter declarations");
7399 /* Give error if `virtual' is used outside of class declaration. */
7401 && (current_class_name == NULL_TREE || decl_context != FIELD))
7403 error ("virtual outside class declaration");
7407 /* Static anonymous unions are dealt with here. */
7408 if (staticp && decl_context == TYPENAME
7410 && ANON_AGGR_TYPE_P (declspecs->type))
7411 decl_context = FIELD;
7413 /* Warn about storage classes that are invalid for certain
7414 kinds of declarations (parameters, typenames, etc.). */
7415 if (declspecs->conflicting_specifiers_p)
7417 error ("conflicting specifiers in declaration of %qs", name);
7418 storage_class = sc_none;
7422 && storage_class != sc_extern
7423 && storage_class != sc_static)
7424 || declspecs->specs[(int)ds_typedef]))
7426 error ("multiple storage classes in declaration of %qs", name);
7429 else if (decl_context != NORMAL
7430 && ((storage_class != sc_none
7431 && storage_class != sc_mutable)
7434 if ((decl_context == PARM || decl_context == CATCHPARM)
7435 && (storage_class == sc_register
7436 || storage_class == sc_auto))
7438 else if (declspecs->specs[(int)ds_typedef])
7440 else if (decl_context == FIELD
7441 /* C++ allows static class elements. */
7442 && storage_class == sc_static)
7443 /* C++ also allows inlines and signed and unsigned elements,
7444 but in those cases we don't come in here. */
7448 if (decl_context == FIELD)
7449 error ("storage class specified for %qs", name);
7452 if (decl_context == PARM || decl_context == CATCHPARM)
7453 error ("storage class specified for parameter %qs", name);
7455 error ("storage class specified for typename");
7457 if (storage_class == sc_register
7458 || storage_class == sc_auto
7459 || storage_class == sc_extern
7461 storage_class = sc_none;
7464 else if (storage_class == sc_extern && initialized
7467 if (toplevel_bindings_p ())
7469 /* It's common practice (and completely valid) to have a const
7470 be initialized and declared extern. */
7471 if (!(type_quals & TYPE_QUAL_CONST))
7472 warning (0, "%qs initialized and declared %<extern%>", name);
7475 error ("%qs has both %<extern%> and initializer", name);
7477 else if (storage_class == sc_extern && funcdef_flag
7478 && ! toplevel_bindings_p ())
7479 error ("nested function %qs declared %<extern%>", name);
7480 else if (toplevel_bindings_p ())
7482 if (storage_class == sc_auto)
7483 error ("top-level declaration of %qs specifies %<auto%>", name);
7486 && storage_class != sc_extern
7487 && storage_class != sc_static)
7489 error ("function-scope %qs implicitly auto and declared %<__thread%>",
7494 if (storage_class && friendp)
7495 error ("storage class specifiers invalid in friend function declarations");
7498 unqualified_id = NULL_TREE;
7501 unqualified_id = id_declarator->u.id.unqualified_name;
7502 switch (TREE_CODE (unqualified_id))
7506 = constructor_name (TREE_OPERAND (unqualified_id, 0));
7509 case IDENTIFIER_NODE:
7510 case TEMPLATE_ID_EXPR:
7518 /* Determine the type of the entity declared by recurring on the
7520 for (; declarator; declarator = declarator->declarator)
7522 const cp_declarator *inner_declarator;
7525 if (type == error_mark_node)
7526 return error_mark_node;
7528 attrs = declarator->attributes;
7534 if (declarator == NULL || declarator->kind == cdk_id)
7535 attr_flags |= (int) ATTR_FLAG_DECL_NEXT;
7536 if (declarator->kind == cdk_function)
7537 attr_flags |= (int) ATTR_FLAG_FUNCTION_NEXT;
7538 if (declarator->kind == cdk_array)
7539 attr_flags |= (int) ATTR_FLAG_ARRAY_NEXT;
7540 returned_attrs = decl_attributes (&type,
7541 chainon (returned_attrs, attrs),
7545 if (declarator->kind == cdk_id)
7548 inner_declarator = declarator->declarator;
7550 switch (declarator->kind)
7553 type = create_array_type_for_decl (dname, type,
7554 declarator->u.array.bounds);
7562 /* Declaring a function type.
7563 Make sure we have a valid type for the function to return. */
7565 /* We now know that the TYPE_QUALS don't apply to the
7566 decl, but to its return type. */
7567 type_quals = TYPE_UNQUALIFIED;
7569 /* Warn about some types functions can't return. */
7571 if (TREE_CODE (type) == FUNCTION_TYPE)
7573 error ("%qs declared as function returning a function", name);
7574 type = integer_type_node;
7576 if (TREE_CODE (type) == ARRAY_TYPE)
7578 error ("%qs declared as function returning an array", name);
7579 type = integer_type_node;
7582 /* Pick up type qualifiers which should be applied to `this'. */
7583 memfn_quals = declarator->u.function.qualifiers;
7585 /* Pick up the exception specifications. */
7586 raises = declarator->u.function.exception_specification;
7588 /* Say it's a definition only for the CALL_EXPR
7589 closest to the identifier. */
7590 funcdecl_p = inner_declarator && inner_declarator->kind == cdk_id;
7592 if (ctype == NULL_TREE
7593 && decl_context == FIELD
7595 && (friendp == 0 || dname == current_class_name))
7596 ctype = current_class_type;
7598 if (ctype && (sfk == sfk_constructor
7599 || sfk == sfk_destructor))
7601 /* We are within a class's scope. If our declarator name
7602 is the same as the class name, and we are defining
7603 a function, then it is a constructor/destructor, and
7604 therefore returns a void type. */
7606 /* ISO C++ 12.4/2. A destructor may not be declared
7607 const or volatile. A destructor may not be
7610 ISO C++ 12.1. A constructor may not be declared
7611 const or volatile. A constructor may not be
7612 virtual. A constructor may not be static. */
7614 error ((flags == DTOR_FLAG)
7615 ? "destructor cannot be static member function"
7616 : "constructor cannot be static member function");
7619 error ((flags == DTOR_FLAG)
7620 ? "destructors may not be cv-qualified"
7621 : "constructors may not be cv-qualified");
7622 memfn_quals = TYPE_UNQUALIFIED;
7625 if (decl_context == FIELD
7626 && !member_function_or_else (ctype,
7629 return error_mark_node;
7631 if (flags != DTOR_FLAG)
7633 /* It's a constructor. */
7638 pedwarn ("constructors cannot be declared virtual");
7641 if (decl_context == FIELD
7642 && sfk != sfk_constructor)
7643 return error_mark_node;
7645 if (decl_context == FIELD)
7651 error ("can't initialize friend function %qs", name);
7654 /* Cannot be both friend and virtual. */
7655 error ("virtual functions cannot be friends");
7658 if (decl_context == NORMAL)
7659 error ("friend declaration not in class definition");
7660 if (current_function_decl && funcdef_flag)
7661 error ("can't define friend function %qs in a local "
7666 arg_types = grokparms (declarator->u.function.parameters,
7669 if (inner_declarator
7670 && inner_declarator->kind == cdk_id
7671 && inner_declarator->u.id.sfk == sfk_destructor
7672 && arg_types != void_list_node)
7674 error ("destructors may not have parameters");
7675 arg_types = void_list_node;
7679 type = build_function_type (type, arg_types);
7686 /* Filter out pointers-to-references and references-to-references.
7687 We can get these if a TYPE_DECL is used. */
7689 if (TREE_CODE (type) == REFERENCE_TYPE)
7691 error (declarator->kind == cdk_reference
7692 ? "cannot declare reference to %q#T"
7693 : "cannot declare pointer to %q#T", type);
7694 type = TREE_TYPE (type);
7696 else if (VOID_TYPE_P (type))
7698 if (declarator->kind == cdk_reference)
7699 error ("cannot declare reference to %q#T", type);
7700 else if (declarator->kind == cdk_ptrmem)
7701 error ("cannot declare pointer to %q#T member", type);
7704 /* We now know that the TYPE_QUALS don't apply to the decl,
7705 but to the target of the pointer. */
7706 type_quals = TYPE_UNQUALIFIED;
7708 if (declarator->kind == cdk_ptrmem
7709 && (TREE_CODE (type) == FUNCTION_TYPE || memfn_quals))
7711 memfn_quals |= cp_type_quals (type);
7712 type = build_memfn_type (type,
7713 declarator->u.pointer.class_type,
7715 memfn_quals = TYPE_UNQUALIFIED;
7718 if (declarator->kind == cdk_reference)
7720 if (!VOID_TYPE_P (type))
7721 type = build_reference_type (type);
7723 else if (TREE_CODE (type) == METHOD_TYPE)
7724 type = build_ptrmemfunc_type (build_pointer_type (type));
7725 else if (declarator->kind == cdk_ptrmem)
7727 gcc_assert (TREE_CODE (declarator->u.pointer.class_type)
7729 if (declarator->u.pointer.class_type == error_mark_node)
7730 /* We will already have complained. */
7731 type = error_mark_node;
7733 type = build_ptrmem_type (declarator->u.pointer.class_type,
7737 type = build_pointer_type (type);
7739 /* Process a list of type modifier keywords (such as
7740 const or volatile) that were given inside the `*' or `&'. */
7742 if (declarator->u.pointer.qualifiers)
7745 = cp_build_qualified_type (type,
7746 declarator->u.pointer.qualifiers);
7747 type_quals = cp_type_quals (type);
7760 if (unqualified_id && TREE_CODE (unqualified_id) == TEMPLATE_ID_EXPR
7761 && TREE_CODE (type) != FUNCTION_TYPE
7762 && TREE_CODE (type) != METHOD_TYPE)
7764 error ("template-id %qD used as a declarator",
7766 unqualified_id = dname;
7769 /* If TYPE is a FUNCTION_TYPE, but the function name was explicitly
7770 qualified with a class-name, turn it into a METHOD_TYPE, unless
7771 we know that the function is static. We take advantage of this
7772 opportunity to do other processing that pertains to entities
7773 explicitly declared to be class members. Note that if DECLARATOR
7774 is non-NULL, we know it is a cdk_id declarator; otherwise, we
7775 would not have exited the loop above. */
7777 && declarator->u.id.qualifying_scope
7778 && TYPE_P (declarator->u.id.qualifying_scope))
7782 ctype = declarator->u.id.qualifying_scope;
7783 ctype = TYPE_MAIN_VARIANT (ctype);
7785 while (t != NULL_TREE && CLASS_TYPE_P (t))
7787 /* You're supposed to have one `template <...>' for every
7788 template class, but you don't need one for a full
7789 specialization. For example:
7791 template <class T> struct S{};
7792 template <> struct S<int> { void f(); };
7793 void S<int>::f () {}
7795 is correct; there shouldn't be a `template <>' for the
7796 definition of `S<int>::f'. */
7797 if (CLASSTYPE_TEMPLATE_SPECIALIZATION (t)
7798 && !any_dependent_template_arguments_p (CLASSTYPE_TI_ARGS (t)))
7799 /* T is an explicit (not partial) specialization. All
7800 containing classes must therefore also be explicitly
7803 if ((CLASSTYPE_USE_TEMPLATE (t) || CLASSTYPE_IS_TEMPLATE (t))
7804 && PRIMARY_TEMPLATE_P (CLASSTYPE_TI_TEMPLATE (t)))
7805 template_count += 1;
7807 t = TYPE_MAIN_DECL (t);
7808 t = DECL_CONTEXT (t);
7811 if (ctype == current_class_type)
7814 pedwarn ("member functions are implicitly friends of their class");
7816 pedwarn ("extra qualification %<%T::%> on member %qs",
7819 else if (/* If the qualifying type is already complete, then we
7820 can skip the following checks. */
7821 !COMPLETE_TYPE_P (ctype)
7822 && (/* If the function is being defined, then
7823 qualifying type must certainly be complete. */
7825 /* A friend declaration of "T::f" is OK, even if
7826 "T" is a template parameter. But, if this
7827 function is not a friend, the qualifying type
7829 || (!friendp && !CLASS_TYPE_P (ctype))
7830 /* For a declaration, the type need not be
7831 complete, if either it is dependent (since there
7832 is no meaningful definition of complete in that
7833 case) or the qualifying class is currently being
7835 || !(dependent_type_p (ctype)
7836 || currently_open_class (ctype)))
7837 /* Check that the qualifying type is complete. */
7838 && !complete_type_or_else (ctype, NULL_TREE))
7839 return error_mark_node;
7840 else if (TREE_CODE (type) == FUNCTION_TYPE)
7842 tree sname = declarator->u.id.unqualified_name;
7844 if (current_class_type
7845 && (!friendp || funcdef_flag))
7848 ? "cannot define member function %<%T::%s%> within %<%T%>"
7849 : "cannot declare member function %<%T::%s%> within %<%T%>",
7850 ctype, name, current_class_type);
7851 return error_mark_node;
7854 if (TREE_CODE (sname) == IDENTIFIER_NODE
7855 && NEW_DELETE_OPNAME_P (sname))
7856 /* Overloaded operator new and operator delete
7857 are always static functions. */
7860 type = build_memfn_type (type, ctype, memfn_quals);
7862 else if (declspecs->specs[(int)ds_typedef]
7863 && current_class_type)
7865 error ("cannot declare member %<%T::%s%> within %qT",
7866 ctype, name, current_class_type);
7867 return error_mark_node;
7871 /* Now TYPE has the actual type. */
7876 *attrlist = chainon (returned_attrs, *attrlist);
7878 attrlist = &returned_attrs;
7881 /* Did array size calculations overflow? */
7883 if (TREE_CODE (type) == ARRAY_TYPE
7884 && COMPLETE_TYPE_P (type)
7885 && TREE_CODE (TYPE_SIZE_UNIT (type)) == INTEGER_CST
7886 && TREE_OVERFLOW (TYPE_SIZE_UNIT (type)))
7888 error ("size of array %qs is too large", name);
7889 /* If we proceed with the array type as it is, we'll eventually
7890 crash in tree_low_cst(). */
7891 type = error_mark_node;
7894 if ((decl_context == FIELD || decl_context == PARM)
7895 && !processing_template_decl
7896 && variably_modified_type_p (type, NULL_TREE))
7898 if (decl_context == FIELD)
7899 error ("data member may not have variably modified type %qT", type);
7901 error ("parameter may not have variably modified type %qT", type);
7902 type = error_mark_node;
7905 if (explicitp == 1 || (explicitp && friendp))
7907 /* [dcl.fct.spec] The explicit specifier shall only be used in
7908 declarations of constructors within a class definition. */
7909 error ("only declarations of constructors can be %<explicit%>");
7913 if (storage_class == sc_mutable)
7915 if (decl_context != FIELD || friendp)
7917 error ("non-member %qs cannot be declared %<mutable%>", name);
7918 storage_class = sc_none;
7920 else if (decl_context == TYPENAME || declspecs->specs[(int)ds_typedef])
7922 error ("non-object member %qs cannot be declared %<mutable%>", name);
7923 storage_class = sc_none;
7925 else if (TREE_CODE (type) == FUNCTION_TYPE
7926 || TREE_CODE (type) == METHOD_TYPE)
7928 error ("function %qs cannot be declared %<mutable%>", name);
7929 storage_class = sc_none;
7933 error ("static %qs cannot be declared %<mutable%>", name);
7934 storage_class = sc_none;
7936 else if (type_quals & TYPE_QUAL_CONST)
7938 error ("const %qs cannot be declared %<mutable%>", name);
7939 storage_class = sc_none;
7943 /* If this is declaring a typedef name, return a TYPE_DECL. */
7944 if (declspecs->specs[(int)ds_typedef] && decl_context != TYPENAME)
7948 /* Note that the grammar rejects storage classes
7949 in typenames, fields or parameters. */
7950 if (current_lang_name == lang_name_java)
7951 TYPE_FOR_JAVA (type) = 1;
7953 /* This declaration:
7955 typedef void f(int) const;
7957 declares a function type which is not a member of any
7958 particular class, but which is cv-qualified; for
7959 example "f S::*" declares a pointer to a const-qualified
7960 member function of S. We record the cv-qualification in the
7962 if (memfn_quals && TREE_CODE (type) == FUNCTION_TYPE)
7963 type = cp_build_qualified_type (type, memfn_quals);
7965 if (decl_context == FIELD)
7966 decl = build_lang_decl (TYPE_DECL, unqualified_id, type);
7968 decl = build_decl (TYPE_DECL, unqualified_id, type);
7969 if (id_declarator && declarator->u.id.qualifying_scope)
7970 error ("%Jtypedef name may not be a nested-name-specifier", decl);
7972 if (decl_context != FIELD)
7974 if (!current_function_decl)
7975 DECL_CONTEXT (decl) = FROB_CONTEXT (current_namespace);
7976 else if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (current_function_decl)
7977 || (DECL_MAYBE_IN_CHARGE_DESTRUCTOR_P
7978 (current_function_decl)))
7979 /* The TYPE_DECL is "abstract" because there will be
7980 clones of this constructor/destructor, and there will
7981 be copies of this TYPE_DECL generated in those
7983 DECL_ABSTRACT (decl) = 1;
7985 else if (constructor_name_p (unqualified_id, current_class_type))
7986 pedwarn ("ISO C++ forbids nested type %qD with same name "
7987 "as enclosing class",
7990 /* If the user declares "typedef struct {...} foo" then the
7991 struct will have an anonymous name. Fill that name in now.
7992 Nothing can refer to it, so nothing needs know about the name
7994 if (type != error_mark_node
7997 && TREE_CODE (TYPE_NAME (type)) == TYPE_DECL
7998 && TYPE_ANONYMOUS_P (type)
7999 /* Don't do this if there are attributes. */
8000 && (!attrlist || !*attrlist)
8001 && cp_type_quals (type) == TYPE_UNQUALIFIED)
8003 tree oldname = TYPE_NAME (type);
8006 /* Replace the anonymous name with the real name everywhere. */
8007 for (t = TYPE_MAIN_VARIANT (type); t; t = TYPE_NEXT_VARIANT (t))
8008 if (TYPE_NAME (t) == oldname)
8009 TYPE_NAME (t) = decl;
8011 if (TYPE_LANG_SPECIFIC (type))
8012 TYPE_WAS_ANONYMOUS (type) = 1;
8014 /* If this is a typedef within a template class, the nested
8015 type is a (non-primary) template. The name for the
8016 template needs updating as well. */
8017 if (TYPE_LANG_SPECIFIC (type) && CLASSTYPE_TEMPLATE_INFO (type))
8018 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type))
8019 = TYPE_IDENTIFIER (type);
8021 /* FIXME remangle member functions; member functions of a
8022 type with external linkage have external linkage. */
8025 /* Any qualifiers on a function type typedef have already been
8027 if (memfn_quals && !ctype && TREE_CODE (type) == FUNCTION_TYPE)
8028 memfn_quals = TYPE_UNQUALIFIED;
8031 || (typedef_decl && C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl)))
8032 C_TYPEDEF_EXPLICITLY_SIGNED (decl) = 1;
8034 bad_specifiers (decl, "type", virtualp,
8035 memfn_quals != TYPE_UNQUALIFIED,
8036 inlinep, friendp, raises != NULL_TREE);
8041 /* Detect the case of an array type of unspecified size
8042 which came, as such, direct from a typedef name.
8043 We must copy the type, so that the array's domain can be
8044 individually set by the object's initializer. */
8046 if (type && typedef_type
8047 && TREE_CODE (type) == ARRAY_TYPE && !TYPE_DOMAIN (type)
8048 && TYPE_MAIN_VARIANT (type) == TYPE_MAIN_VARIANT (typedef_type))
8049 type = build_cplus_array_type (TREE_TYPE (type), NULL_TREE);
8051 /* Detect where we're using a typedef of function type to declare a
8052 function. PARMS will not be set, so we must create it now. */
8054 if (type == typedef_type && TREE_CODE (type) == FUNCTION_TYPE)
8056 tree decls = NULL_TREE;
8059 for (args = TYPE_ARG_TYPES (type); args; args = TREE_CHAIN (args))
8061 tree decl = cp_build_parm_decl (NULL_TREE, TREE_VALUE (args));
8063 TREE_CHAIN (decl) = decls;
8067 parms = nreverse (decls);
8069 if (decl_context != TYPENAME)
8071 /* A cv-qualifier-seq shall only be part of the function type
8072 for a non-static member function. [8.3.5/4 dcl.fct] */
8073 if (cp_type_quals (type) != TYPE_UNQUALIFIED
8074 && (current_class_type == NULL_TREE || staticp) )
8076 error ("qualified function types cannot be used to declare %s functions",
8077 (staticp? "static member" : "free"));
8078 type = TYPE_MAIN_VARIANT (type);
8081 /* The qualifiers on the function type become the qualifiers on
8082 the non-static member function. */
8083 memfn_quals |= cp_type_quals (type);
8087 /* If this is a type name (such as, in a cast or sizeof),
8088 compute the type and return it now. */
8090 if (decl_context == TYPENAME)
8092 /* Note that the grammar rejects storage classes
8093 in typenames, fields or parameters. */
8094 if (type_quals != TYPE_UNQUALIFIED)
8095 type_quals = TYPE_UNQUALIFIED;
8097 /* Special case: "friend class foo" looks like a TYPENAME context. */
8100 if (type_quals != TYPE_UNQUALIFIED)
8102 error ("type qualifiers specified for friend class declaration");
8103 type_quals = TYPE_UNQUALIFIED;
8107 error ("%<inline%> specified for friend class declaration");
8113 /* Don't allow friend declaration without a class-key. */
8114 if (TREE_CODE (type) == TEMPLATE_TYPE_PARM)
8115 pedwarn ("template parameters cannot be friends");
8116 else if (TREE_CODE (type) == TYPENAME_TYPE)
8117 pedwarn ("friend declaration requires class-key, "
8118 "i.e. %<friend class %T::%D%>",
8119 TYPE_CONTEXT (type), TYPENAME_TYPE_FULLNAME (type));
8121 pedwarn ("friend declaration requires class-key, "
8122 "i.e. %<friend %#T%>",
8126 /* Only try to do this stuff if we didn't already give up. */
8127 if (type != integer_type_node)
8129 /* A friendly class? */
8130 if (current_class_type)
8131 make_friend_class (current_class_type, TYPE_MAIN_VARIANT (type),
8134 error ("trying to make class %qT a friend of global scope",
8137 type = void_type_node;
8140 else if (memfn_quals)
8142 if (ctype == NULL_TREE)
8144 if (TREE_CODE (type) != METHOD_TYPE)
8145 error ("invalid qualifiers on non-member function type");
8147 ctype = TYPE_METHOD_BASETYPE (type);
8150 type = build_memfn_type (type, ctype, memfn_quals);
8155 else if (unqualified_id == NULL_TREE && decl_context != PARM
8156 && decl_context != CATCHPARM
8157 && TREE_CODE (type) != UNION_TYPE
8160 error ("abstract declarator %qT used as declaration", type);
8161 return error_mark_node;
8164 /* Only functions may be declared using an operator-function-id. */
8166 && IDENTIFIER_OPNAME_P (unqualified_id)
8167 && TREE_CODE (type) != FUNCTION_TYPE
8168 && TREE_CODE (type) != METHOD_TYPE)
8170 error ("declaration of %qD as non-function", unqualified_id);
8171 return error_mark_node;
8174 /* We don't check parameter types here because we can emit a better
8175 error message later. */
8176 if (decl_context != PARM)
8178 type = check_var_type (unqualified_id, type);
8179 if (type == error_mark_node)
8180 return error_mark_node;
8183 /* Now create the decl, which may be a VAR_DECL, a PARM_DECL
8184 or a FUNCTION_DECL, depending on DECL_CONTEXT and TYPE. */
8186 if (decl_context == PARM || decl_context == CATCHPARM)
8188 if (ctype || in_namespace)
8189 error ("cannot use %<::%> in parameter declaration");
8191 /* A parameter declared as an array of T is really a pointer to T.
8192 One declared as a function is really a pointer to a function.
8193 One declared as a member is really a pointer to member. */
8195 if (TREE_CODE (type) == ARRAY_TYPE)
8197 /* Transfer const-ness of array into that of type pointed to. */
8198 type = build_pointer_type (TREE_TYPE (type));
8199 type_quals = TYPE_UNQUALIFIED;
8201 else if (TREE_CODE (type) == FUNCTION_TYPE)
8202 type = build_pointer_type (type);
8208 if (decl_context == PARM)
8210 decl = cp_build_parm_decl (unqualified_id, type);
8212 bad_specifiers (decl, "parameter", virtualp,
8213 memfn_quals != TYPE_UNQUALIFIED,
8214 inlinep, friendp, raises != NULL_TREE);
8216 else if (decl_context == FIELD)
8218 /* The C99 flexible array extension. */
8219 if (!staticp && TREE_CODE (type) == ARRAY_TYPE
8220 && TYPE_DOMAIN (type) == NULL_TREE)
8222 tree itype = compute_array_index_type (dname, integer_zero_node);
8223 type = build_cplus_array_type (TREE_TYPE (type), itype);
8226 if (type == error_mark_node)
8228 /* Happens when declaring arrays of sizes which
8229 are error_mark_node, for example. */
8232 else if (in_namespace && !friendp)
8234 /* Something like struct S { int N::j; }; */
8235 error ("invalid use of %<::%>");
8236 return error_mark_node;
8238 else if (TREE_CODE (type) == FUNCTION_TYPE)
8241 tree function_context;
8245 if (ctype == NULL_TREE)
8246 ctype = current_class_type;
8248 if (ctype == NULL_TREE)
8250 error ("can't make %qD into a method -- not in a class",
8252 return error_mark_node;
8255 /* ``A union may [ ... ] not [ have ] virtual functions.''
8257 if (virtualp && TREE_CODE (ctype) == UNION_TYPE)
8259 error ("function %qD declared virtual inside a union",
8261 return error_mark_node;
8264 if (NEW_DELETE_OPNAME_P (unqualified_id))
8268 error ("%qD cannot be declared virtual, since it "
8274 else if (staticp < 2)
8275 type = build_memfn_type (type, ctype, memfn_quals);
8278 /* Check that the name used for a destructor makes sense. */
8279 if (sfk == sfk_destructor)
8283 gcc_assert (friendp);
8284 error ("expected qualified name in friend declaration "
8285 "for destructor %qD",
8286 id_declarator->u.id.unqualified_name);
8287 return error_mark_node;
8290 if (!same_type_p (TREE_OPERAND
8291 (id_declarator->u.id.unqualified_name, 0),
8294 error ("declaration of %qD as member of %qT",
8295 id_declarator->u.id.unqualified_name, ctype);
8296 return error_mark_node;
8300 /* Tell grokfndecl if it needs to set TREE_PUBLIC on the node. */
8301 function_context = (ctype != NULL_TREE) ?
8302 decl_function_context (TYPE_MAIN_DECL (ctype)) : NULL_TREE;
8303 publicp = (! friendp || ! staticp)
8304 && function_context == NULL_TREE;
8305 decl = grokfndecl (ctype, type,
8306 TREE_CODE (unqualified_id) != TEMPLATE_ID_EXPR
8307 ? unqualified_id : dname,
8310 virtualp, flags, memfn_quals, raises,
8311 friendp ? -1 : 0, friendp, publicp, inlinep,
8313 funcdef_flag, template_count, in_namespace, attrlist);
8314 if (decl == NULL_TREE)
8315 return error_mark_node;
8317 /* This clobbers the attrs stored in `decl' from `attrlist'. */
8318 /* The decl and setting of decl_attr is also turned off. */
8319 decl = build_decl_attribute_variant (decl, decl_attr);
8322 /* [class.conv.ctor]
8324 A constructor declared without the function-specifier
8325 explicit that can be called with a single parameter
8326 specifies a conversion from the type of its first
8327 parameter to the type of its class. Such a constructor
8328 is called a converting constructor. */
8330 DECL_NONCONVERTING_P (decl) = 1;
8331 else if (DECL_CONSTRUCTOR_P (decl))
8333 /* The constructor can be called with exactly one
8334 parameter if there is at least one parameter, and
8335 any subsequent parameters have default arguments.
8336 Ignore any compiler-added parms. */
8337 tree arg_types = FUNCTION_FIRST_USER_PARMTYPE (decl);
8339 if (arg_types == void_list_node
8341 && TREE_CHAIN (arg_types)
8342 && TREE_CHAIN (arg_types) != void_list_node
8343 && !TREE_PURPOSE (TREE_CHAIN (arg_types))))
8344 DECL_NONCONVERTING_P (decl) = 1;
8347 else if (TREE_CODE (type) == METHOD_TYPE)
8349 /* We only get here for friend declarations of
8350 members of other classes. */
8351 /* All method decls are public, so tell grokfndecl to set
8352 TREE_PUBLIC, also. */
8353 decl = grokfndecl (ctype, type,
8354 TREE_CODE (unqualified_id) != TEMPLATE_ID_EXPR
8355 ? unqualified_id : dname,
8358 virtualp, flags, memfn_quals, raises,
8359 friendp ? -1 : 0, friendp, 1, 0, sfk,
8360 funcdef_flag, template_count, in_namespace,
8362 if (decl == NULL_TREE)
8363 return error_mark_node;
8365 else if (!staticp && !dependent_type_p (type)
8366 && !COMPLETE_TYPE_P (complete_type (type))
8367 && (TREE_CODE (type) != ARRAY_TYPE || initialized == 0))
8370 error ("field %qD has incomplete type", unqualified_id);
8372 error ("name %qT has incomplete type", type);
8374 /* If we're instantiating a template, tell them which
8375 instantiation made the field's type be incomplete. */
8376 if (current_class_type
8377 && TYPE_NAME (current_class_type)
8378 && IDENTIFIER_TEMPLATE (TYPE_IDENTIFIER (current_class_type))
8380 && declspecs->type == type)
8381 error (" in instantiation of template %qT",
8382 current_class_type);
8384 return error_mark_node;
8390 error ("%qE is neither function nor member function; "
8391 "cannot be declared friend", unqualified_id);
8399 /* Friends are treated specially. */
8400 if (ctype == current_class_type)
8401 ; /* We already issued a pedwarn. */
8402 else if (decl && DECL_NAME (decl))
8404 if (template_class_depth (current_class_type) == 0)
8406 decl = check_explicit_specialization
8407 (unqualified_id, decl, template_count,
8408 2 * funcdef_flag + 4);
8409 if (decl == error_mark_node)
8410 return error_mark_node;
8413 decl = do_friend (ctype, unqualified_id, decl,
8419 return error_mark_node;
8422 /* Structure field. It may not be a function, except for C++. */
8424 if (decl == NULL_TREE)
8430 /* An attempt is being made to initialize a non-static
8431 member. But, from [class.mem]:
8433 4 A member-declarator can contain a
8434 constant-initializer only if it declares a static
8435 member (_class.static_) of integral or enumeration
8436 type, see _class.static.data_.
8438 This used to be relatively common practice, but
8439 the rest of the compiler does not correctly
8440 handle the initialization unless the member is
8441 static so we make it static below. */
8442 pedwarn ("ISO C++ forbids initialization of member %qD",
8444 pedwarn ("making %qD static", unqualified_id);
8448 if (uses_template_parms (type))
8449 /* We'll check at instantiation time. */
8451 else if (check_static_variable_definition (unqualified_id,
8453 /* If we just return the declaration, crashes
8454 will sometimes occur. We therefore return
8455 void_type_node, as if this was a friend
8456 declaration, to cause callers to completely
8457 ignore this declaration. */
8458 return error_mark_node;
8463 /* C++ allows static class members. All other work
8464 for this is done by grokfield. */
8465 decl = build_lang_decl (VAR_DECL, unqualified_id, type);
8466 set_linkage_for_static_data_member (decl);
8467 /* Even if there is an in-class initialization, DECL
8468 is considered undefined until an out-of-class
8469 definition is provided. */
8470 DECL_EXTERNAL (decl) = 1;
8474 if (targetm.have_tls)
8475 DECL_TLS_MODEL (decl) = decl_default_tls_model (decl);
8477 /* A mere warning is sure to result in improper
8478 semantics at runtime. Don't bother to allow this to
8480 error ("thread-local storage not supported for this target");
8485 decl = build_decl (FIELD_DECL, unqualified_id, type);
8486 DECL_NONADDRESSABLE_P (decl) = bitfield;
8487 if (storage_class == sc_mutable)
8489 DECL_MUTABLE_P (decl) = 1;
8490 storage_class = sc_none;
8494 bad_specifiers (decl, "field", virtualp,
8495 memfn_quals != TYPE_UNQUALIFIED,
8496 inlinep, friendp, raises != NULL_TREE);
8499 else if (TREE_CODE (type) == FUNCTION_TYPE
8500 || TREE_CODE (type) == METHOD_TYPE)
8505 if (!unqualified_id)
8506 return error_mark_node;
8508 if (TREE_CODE (unqualified_id) == TEMPLATE_ID_EXPR)
8509 original_name = dname;
8511 original_name = unqualified_id;
8513 if (storage_class == sc_auto)
8514 error ("storage class %<auto%> invalid for function %qs", name);
8515 else if (storage_class == sc_register)
8516 error ("storage class %<register%> invalid for function %qs", name);
8518 error ("storage class %<__thread%> invalid for function %qs", name);
8520 /* Function declaration not at top level.
8521 Storage classes other than `extern' are not allowed
8522 and `extern' makes no difference. */
8523 if (! toplevel_bindings_p ()
8524 && (storage_class == sc_static
8525 || declspecs->specs[(int)ds_inline])
8528 if (storage_class == sc_static)
8529 pedwarn ("%<static%> specified invalid for function %qs "
8530 "declared out of global scope", name);
8532 pedwarn ("%<inline%> specifier invalid for function %qs "
8533 "declared out of global scope", name);
8536 if (ctype == NULL_TREE)
8540 error ("virtual non-class function %qs", name);
8544 else if (TREE_CODE (type) == FUNCTION_TYPE && staticp < 2
8545 && !NEW_DELETE_OPNAME_P (original_name))
8546 type = build_method_type_directly (ctype,
8548 TYPE_ARG_TYPES (type));
8550 /* Record presence of `static'. */
8551 publicp = (ctype != NULL_TREE
8552 || storage_class == sc_extern
8553 || storage_class != sc_static);
8555 decl = grokfndecl (ctype, type, original_name, parms, unqualified_id,
8556 virtualp, flags, memfn_quals, raises,
8558 publicp, inlinep, sfk, funcdef_flag,
8559 template_count, in_namespace, attrlist);
8560 if (decl == NULL_TREE)
8561 return error_mark_node;
8565 int invalid_static = 0;
8567 /* Don't allow a static member function in a class, and forbid
8568 declaring main to be static. */
8569 if (TREE_CODE (type) == METHOD_TYPE)
8571 pedwarn ("cannot declare member function %qD to have "
8572 "static linkage", decl);
8575 else if (current_function_decl)
8577 /* FIXME need arm citation */
8578 error ("cannot declare static function inside another function");
8585 storage_class = sc_none;
8591 /* It's a variable. */
8593 /* An uninitialized decl with `extern' is a reference. */
8594 decl = grokvardecl (type, unqualified_id,
8597 (type_quals & TYPE_QUAL_CONST) != 0,
8598 ctype ? ctype : in_namespace);
8599 bad_specifiers (decl, "variable", virtualp,
8600 memfn_quals != TYPE_UNQUALIFIED,
8601 inlinep, friendp, raises != NULL_TREE);
8605 DECL_CONTEXT (decl) = ctype;
8608 pedwarn ("%<static%> may not be used when defining "
8609 "(as opposed to declaring) a static data member");
8611 storage_class = sc_none;
8613 if (storage_class == sc_register && TREE_STATIC (decl))
8615 error ("static member %qD declared %<register%>", decl);
8616 storage_class = sc_none;
8618 if (storage_class == sc_extern && pedantic)
8620 pedwarn ("cannot explicitly declare member %q#D to have "
8623 storage_class = sc_none;
8628 /* Record `register' declaration for warnings on &
8629 and in case doing stupid register allocation. */
8631 if (storage_class == sc_register)
8632 DECL_REGISTER (decl) = 1;
8633 else if (storage_class == sc_extern)
8634 DECL_THIS_EXTERN (decl) = 1;
8635 else if (storage_class == sc_static)
8636 DECL_THIS_STATIC (decl) = 1;
8638 /* Record constancy and volatility. There's no need to do this
8639 when processing a template; we'll do this for the instantiated
8640 declaration based on the type of DECL. */
8641 if (!processing_template_decl)
8642 cp_apply_type_quals_to_decl (type_quals, decl);
8648 /* Subroutine of start_function. Ensure that each of the parameter
8649 types (as listed in PARMS) is complete, as is required for a
8650 function definition. */
8653 require_complete_types_for_parms (tree parms)
8655 for (; parms; parms = TREE_CHAIN (parms))
8657 if (dependent_type_p (TREE_TYPE (parms)))
8659 if (!VOID_TYPE_P (TREE_TYPE (parms))
8660 && complete_type_or_else (TREE_TYPE (parms), parms))
8662 relayout_decl (parms);
8663 DECL_ARG_TYPE (parms) = type_passed_as (TREE_TYPE (parms));
8666 /* grokparms or complete_type_or_else will have already issued
8668 TREE_TYPE (parms) = error_mark_node;
8672 /* Returns nonzero if T is a local variable. */
8675 local_variable_p (tree t)
8677 if ((TREE_CODE (t) == VAR_DECL
8678 /* A VAR_DECL with a context that is a _TYPE is a static data
8680 && !TYPE_P (CP_DECL_CONTEXT (t))
8681 /* Any other non-local variable must be at namespace scope. */
8682 && !DECL_NAMESPACE_SCOPE_P (t))
8683 || (TREE_CODE (t) == PARM_DECL))
8689 /* Returns nonzero if T is an automatic local variable or a label.
8690 (These are the declarations that need to be remapped when the code
8691 containing them is duplicated.) */
8694 nonstatic_local_decl_p (tree t)
8696 return ((local_variable_p (t) && !TREE_STATIC (t))
8697 || TREE_CODE (t) == LABEL_DECL
8698 || TREE_CODE (t) == RESULT_DECL);
8701 /* Like local_variable_p, but suitable for use as a tree-walking
8705 local_variable_p_walkfn (tree *tp, int *walk_subtrees,
8706 void *data ATTRIBUTE_UNUSED)
8708 if (local_variable_p (*tp) && !DECL_ARTIFICIAL (*tp))
8710 else if (TYPE_P (*tp))
8717 /* Check that ARG, which is a default-argument expression for a
8718 parameter DECL, is valid. Returns ARG, or ERROR_MARK_NODE, if
8719 something goes wrong. DECL may also be a _TYPE node, rather than a
8720 DECL, if there is no DECL available. */
8723 check_default_argument (tree decl, tree arg)
8728 if (TREE_CODE (arg) == DEFAULT_ARG)
8729 /* We get a DEFAULT_ARG when looking at an in-class declaration
8730 with a default argument. Ignore the argument for now; we'll
8731 deal with it after the class is complete. */
8740 decl_type = TREE_TYPE (decl);
8742 if (arg == error_mark_node
8743 || decl == error_mark_node
8744 || TREE_TYPE (arg) == error_mark_node
8745 || decl_type == error_mark_node)
8746 /* Something already went wrong. There's no need to check
8748 return error_mark_node;
8750 /* [dcl.fct.default]
8752 A default argument expression is implicitly converted to the
8754 if (!TREE_TYPE (arg)
8755 || !can_convert_arg (decl_type, TREE_TYPE (arg), arg, LOOKUP_NORMAL))
8758 error ("default argument for %q#D has type %qT",
8759 decl, TREE_TYPE (arg));
8761 error ("default argument for parameter of type %qT has type %qT",
8762 decl_type, TREE_TYPE (arg));
8764 return error_mark_node;
8767 /* [dcl.fct.default]
8769 Local variables shall not be used in default argument
8772 The keyword `this' shall not be used in a default argument of a
8774 var = walk_tree_without_duplicates (&arg, local_variable_p_walkfn,
8778 error ("default argument %qE uses local variable %qD", arg, var);
8779 return error_mark_node;
8786 /* Decode the list of parameter types for a function type.
8787 Given the list of things declared inside the parens,
8788 return a list of types.
8790 If this parameter does not end with an ellipsis, we append
8793 *PARMS is set to the chain of PARM_DECLs created. */
8796 grokparms (cp_parameter_declarator *first_parm, tree *parms)
8798 tree result = NULL_TREE;
8799 tree decls = NULL_TREE;
8800 int ellipsis = !first_parm || first_parm->ellipsis_p;
8801 cp_parameter_declarator *parm;
8804 for (parm = first_parm; parm != NULL; parm = parm->next)
8806 tree type = NULL_TREE;
8807 tree init = parm->default_argument;
8811 if (parm == no_parameters)
8814 attrs = parm->decl_specifiers.attributes;
8815 parm->decl_specifiers.attributes = NULL_TREE;
8816 decl = grokdeclarator (parm->declarator, &parm->decl_specifiers,
8817 PARM, init != NULL_TREE, &attrs);
8818 if (! decl || TREE_TYPE (decl) == error_mark_node)
8822 cplus_decl_attributes (&decl, attrs, 0);
8824 type = TREE_TYPE (decl);
8825 if (VOID_TYPE_P (type))
8827 if (same_type_p (type, void_type_node)
8828 && DECL_SELF_REFERENCE_P (type)
8829 && !DECL_NAME (decl) && !result && !parm->next && !ellipsis)
8830 /* this is a parmlist of `(void)', which is ok. */
8832 cxx_incomplete_type_error (decl, type);
8833 /* It's not a good idea to actually create parameters of
8834 type `void'; other parts of the compiler assume that a
8835 void type terminates the parameter list. */
8836 type = error_mark_node;
8837 TREE_TYPE (decl) = error_mark_node;
8840 if (type != error_mark_node)
8842 /* Top-level qualifiers on the parameters are
8843 ignored for function types. */
8844 type = cp_build_qualified_type (type, 0);
8845 if (TREE_CODE (type) == METHOD_TYPE)
8847 error ("parameter %qD invalidly declared method type", decl);
8848 type = build_pointer_type (type);
8849 TREE_TYPE (decl) = type;
8851 else if (abstract_virtuals_error (decl, type))
8852 any_error = 1; /* Seems like a good idea. */
8853 else if (POINTER_TYPE_P (type))
8855 /* [dcl.fct]/6, parameter types cannot contain pointers
8856 (references) to arrays of unknown bound. */
8857 tree t = TREE_TYPE (type);
8858 int ptr = TYPE_PTR_P (type);
8864 else if (TREE_CODE (t) != ARRAY_TYPE)
8866 else if (!TYPE_DOMAIN (t))
8870 if (TREE_CODE (t) == ARRAY_TYPE)
8871 error ("parameter %qD includes %s to array of unknown "
8873 decl, ptr ? "pointer" : "reference", t);
8878 else if (init && !processing_template_decl)
8879 init = check_default_argument (decl, init);
8882 TREE_CHAIN (decl) = decls;
8884 result = tree_cons (init, type, result);
8886 decls = nreverse (decls);
8887 result = nreverse (result);
8889 result = chainon (result, void_list_node);
8896 /* D is a constructor or overloaded `operator='.
8898 Let T be the class in which D is declared. Then, this function
8901 -1 if D's is an ill-formed constructor or copy assignment operator
8902 whose first parameter is of type `T'.
8903 0 if D is not a copy constructor or copy assignment
8905 1 if D is a copy constructor or copy assignment operator whose
8906 first parameter is a reference to const qualified T.
8907 2 if D is a copy constructor or copy assignment operator whose
8908 first parameter is a reference to non-const qualified T.
8910 This function can be used as a predicate. Positive values indicate
8911 a copy constructor and nonzero values indicate a copy assignment
8921 gcc_assert (DECL_FUNCTION_MEMBER_P (d));
8923 if (TREE_CODE (d) == TEMPLATE_DECL
8924 || (DECL_TEMPLATE_INFO (d)
8925 && DECL_MEMBER_TEMPLATE_P (DECL_TI_TEMPLATE (d))))
8926 /* Instantiations of template member functions are never copy
8927 functions. Note that member functions of templated classes are
8928 represented as template functions internally, and we must
8929 accept those as copy functions. */
8932 args = FUNCTION_FIRST_USER_PARMTYPE (d);
8936 arg_type = TREE_VALUE (args);
8937 if (arg_type == error_mark_node)
8940 if (TYPE_MAIN_VARIANT (arg_type) == DECL_CONTEXT (d))
8942 /* Pass by value copy assignment operator. */
8945 else if (TREE_CODE (arg_type) == REFERENCE_TYPE
8946 && TYPE_MAIN_VARIANT (TREE_TYPE (arg_type)) == DECL_CONTEXT (d))
8948 if (CP_TYPE_CONST_P (TREE_TYPE (arg_type)))
8954 args = TREE_CHAIN (args);
8956 if (args && args != void_list_node && !TREE_PURPOSE (args))
8957 /* There are more non-optional args. */
8963 /* Remember any special properties of member function DECL. */
8965 void grok_special_member_properties (tree decl)
8969 if (!DECL_NONSTATIC_MEMBER_FUNCTION_P (decl))
8972 class_type = DECL_CONTEXT (decl);
8973 if (DECL_CONSTRUCTOR_P (decl))
8975 int ctor = copy_fn_p (decl);
8977 TYPE_HAS_CONSTRUCTOR (class_type) = 1;
8983 A non-template constructor for class X is a copy
8984 constructor if its first parameter is of type X&, const
8985 X&, volatile X& or const volatile X&, and either there
8986 are no other parameters or else all other parameters have
8987 default arguments. */
8988 TYPE_HAS_INIT_REF (class_type) = 1;
8990 TYPE_HAS_CONST_INIT_REF (class_type) = 1;
8992 else if (sufficient_parms_p (FUNCTION_FIRST_USER_PARMTYPE (decl)))
8993 TYPE_HAS_DEFAULT_CONSTRUCTOR (class_type) = 1;
8995 else if (DECL_OVERLOADED_OPERATOR_P (decl) == NOP_EXPR)
8999 A non-template assignment operator for class X is a copy
9000 assignment operator if its parameter is of type X, X&, const
9001 X&, volatile X& or const volatile X&. */
9003 int assop = copy_fn_p (decl);
9007 TYPE_HAS_ASSIGN_REF (class_type) = 1;
9009 TYPE_HAS_CONST_ASSIGN_REF (class_type) = 1;
9014 /* Check a constructor DECL has the correct form. Complains
9015 if the class has a constructor of the form X(X). */
9018 grok_ctor_properties (tree ctype, tree decl)
9020 int ctor_parm = copy_fn_p (decl);
9026 A declaration of a constructor for a class X is ill-formed if
9027 its first parameter is of type (optionally cv-qualified) X
9028 and either there are no other parameters or else all other
9029 parameters have default arguments.
9031 We *don't* complain about member template instantiations that
9032 have this form, though; they can occur as we try to decide
9033 what constructor to use during overload resolution. Since
9034 overload resolution will never prefer such a constructor to
9035 the non-template copy constructor (which is either explicitly
9036 or implicitly defined), there's no need to worry about their
9037 existence. Theoretically, they should never even be
9038 instantiated, but that's hard to forestall. */
9039 error ("invalid constructor; you probably meant %<%T (const %T&)%>",
9047 /* An operator with this code is unary, but can also be binary. */
9050 ambi_op_p (enum tree_code code)
9052 return (code == INDIRECT_REF
9053 || code == ADDR_EXPR
9054 || code == UNARY_PLUS_EXPR
9055 || code == NEGATE_EXPR
9056 || code == PREINCREMENT_EXPR
9057 || code == PREDECREMENT_EXPR);
9060 /* An operator with this name can only be unary. */
9063 unary_op_p (enum tree_code code)
9065 return (code == TRUTH_NOT_EXPR
9066 || code == BIT_NOT_EXPR
9067 || code == COMPONENT_REF
9068 || code == TYPE_EXPR);
9071 /* DECL is a declaration for an overloaded operator. If COMPLAIN is true,
9072 errors are issued for invalid declarations. */
9075 grok_op_properties (tree decl, bool complain)
9077 tree argtypes = TYPE_ARG_TYPES (TREE_TYPE (decl));
9079 int methodp = (TREE_CODE (TREE_TYPE (decl)) == METHOD_TYPE);
9080 tree name = DECL_NAME (decl);
9081 enum tree_code operator_code;
9086 /* Count the number of arguments and check for ellipsis. */
9087 for (argtype = argtypes, arity = 0;
9088 argtype && argtype != void_list_node;
9089 argtype = TREE_CHAIN (argtype))
9091 ellipsis_p = !argtype;
9093 class_type = DECL_CONTEXT (decl);
9094 if (class_type && !CLASS_TYPE_P (class_type))
9095 class_type = NULL_TREE;
9097 if (DECL_CONV_FN_P (decl))
9098 operator_code = TYPE_EXPR;
9102 #define DEF_OPERATOR(NAME, CODE, MANGLING, ARITY, ASSN_P) \
9103 if (ansi_opname (CODE) == name) \
9105 operator_code = (CODE); \
9108 else if (ansi_assopname (CODE) == name) \
9110 operator_code = (CODE); \
9111 DECL_ASSIGNMENT_OPERATOR_P (decl) = 1; \
9115 #include "operators.def"
9121 gcc_assert (operator_code != LAST_CPLUS_TREE_CODE);
9122 SET_OVERLOADED_OPERATOR_CODE (decl, operator_code);
9125 switch (operator_code)
9128 TYPE_HAS_NEW_OPERATOR (class_type) = 1;
9132 TYPE_GETS_DELETE (class_type) |= 1;
9136 TYPE_HAS_ARRAY_NEW_OPERATOR (class_type) = 1;
9139 case VEC_DELETE_EXPR:
9140 TYPE_GETS_DELETE (class_type) |= 2;
9147 /* [basic.std.dynamic.allocation]/1:
9149 A program is ill-formed if an allocation function is declared
9150 in a namespace scope other than global scope or declared static
9153 The same also holds true for deallocation functions. */
9154 if (operator_code == NEW_EXPR || operator_code == VEC_NEW_EXPR
9155 || operator_code == DELETE_EXPR || operator_code == VEC_DELETE_EXPR)
9157 if (DECL_NAMESPACE_SCOPE_P (decl))
9159 if (CP_DECL_CONTEXT (decl) != global_namespace)
9161 error ("%qD may not be declared within a namespace", decl);
9164 else if (!TREE_PUBLIC (decl))
9166 error ("%qD may not be declared as static", decl);
9172 if (operator_code == NEW_EXPR || operator_code == VEC_NEW_EXPR)
9173 TREE_TYPE (decl) = coerce_new_type (TREE_TYPE (decl));
9174 else if (operator_code == DELETE_EXPR || operator_code == VEC_DELETE_EXPR)
9175 TREE_TYPE (decl) = coerce_delete_type (TREE_TYPE (decl));
9178 /* An operator function must either be a non-static member function
9179 or have at least one parameter of a class, a reference to a class,
9180 an enumeration, or a reference to an enumeration. 13.4.0.6 */
9181 if (! methodp || DECL_STATIC_FUNCTION_P (decl))
9183 if (operator_code == TYPE_EXPR
9184 || operator_code == CALL_EXPR
9185 || operator_code == COMPONENT_REF
9186 || operator_code == ARRAY_REF
9187 || operator_code == NOP_EXPR)
9189 error ("%qD must be a nonstatic member function", decl);
9196 if (DECL_STATIC_FUNCTION_P (decl))
9198 error ("%qD must be either a non-static member "
9199 "function or a non-member function", decl);
9203 for (p = argtypes; p && p != void_list_node; p = TREE_CHAIN (p))
9205 tree arg = non_reference (TREE_VALUE (p));
9206 if (arg == error_mark_node)
9209 /* IS_AGGR_TYPE, rather than CLASS_TYPE_P, is used
9210 because these checks are performed even on
9211 template functions. */
9212 if (IS_AGGR_TYPE (arg) || TREE_CODE (arg) == ENUMERAL_TYPE)
9216 if (!p || p == void_list_node)
9219 error ("%qD must have an argument of class or "
9220 "enumerated type", decl);
9226 /* There are no restrictions on the arguments to an overloaded
9228 if (operator_code == CALL_EXPR)
9231 /* Warn about conversion operators that will never be used. */
9232 if (IDENTIFIER_TYPENAME_P (name)
9233 && ! DECL_TEMPLATE_INFO (decl)
9235 /* Warn only declaring the function; there is no need to
9236 warn again about out-of-class definitions. */
9237 && class_type == current_class_type)
9239 tree t = TREE_TYPE (name);
9240 int ref = (TREE_CODE (t) == REFERENCE_TYPE);
9241 const char *what = 0;
9244 t = TYPE_MAIN_VARIANT (TREE_TYPE (t));
9246 if (TREE_CODE (t) == VOID_TYPE)
9248 else if (class_type)
9250 if (t == class_type)
9251 what = "the same type";
9252 /* Don't force t to be complete here. */
9253 else if (IS_AGGR_TYPE (t)
9254 && COMPLETE_TYPE_P (t)
9255 && DERIVED_FROM_P (t, class_type))
9256 what = "a base class";
9260 warning (OPT_Wconversion, "conversion to %s%s will never use a type "
9261 "conversion operator",
9262 ref ? "a reference to " : "", what);
9265 if (operator_code == COND_EXPR)
9268 error ("ISO C++ prohibits overloading operator ?:");
9271 else if (ellipsis_p)
9273 error ("%qD must not have variable number of arguments", decl);
9276 else if (ambi_op_p (operator_code))
9279 /* We pick the one-argument operator codes by default, so
9280 we don't have to change anything. */
9282 else if (arity == 2)
9284 /* If we thought this was a unary operator, we now know
9285 it to be a binary operator. */
9286 switch (operator_code)
9289 operator_code = MULT_EXPR;
9293 operator_code = BIT_AND_EXPR;
9296 case UNARY_PLUS_EXPR:
9297 operator_code = PLUS_EXPR;
9301 operator_code = MINUS_EXPR;
9304 case PREINCREMENT_EXPR:
9305 operator_code = POSTINCREMENT_EXPR;
9308 case PREDECREMENT_EXPR:
9309 operator_code = POSTDECREMENT_EXPR;
9316 SET_OVERLOADED_OPERATOR_CODE (decl, operator_code);
9318 if ((operator_code == POSTINCREMENT_EXPR
9319 || operator_code == POSTDECREMENT_EXPR)
9320 && ! processing_template_decl
9321 && ! same_type_p (TREE_VALUE (TREE_CHAIN (argtypes)), integer_type_node))
9324 error ("postfix %qD must take %<int%> as its argument",
9327 error ("postfix %qD must take %<int%> as its second "
9335 error ("%qD must take either zero or one argument", decl);
9337 error ("%qD must take either one or two arguments", decl);
9341 /* More Effective C++ rule 6. */
9343 && (operator_code == POSTINCREMENT_EXPR
9344 || operator_code == POSTDECREMENT_EXPR
9345 || operator_code == PREINCREMENT_EXPR
9346 || operator_code == PREDECREMENT_EXPR))
9348 tree arg = TREE_VALUE (argtypes);
9349 tree ret = TREE_TYPE (TREE_TYPE (decl));
9350 if (methodp || TREE_CODE (arg) == REFERENCE_TYPE)
9351 arg = TREE_TYPE (arg);
9352 arg = TYPE_MAIN_VARIANT (arg);
9353 if (operator_code == PREINCREMENT_EXPR
9354 || operator_code == PREDECREMENT_EXPR)
9356 if (TREE_CODE (ret) != REFERENCE_TYPE
9357 || !same_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (ret)),
9359 warning (OPT_Weffc__, "prefix %qD should return %qT", decl,
9360 build_reference_type (arg));
9364 if (!same_type_p (TYPE_MAIN_VARIANT (ret), arg))
9365 warning (OPT_Weffc__, "postfix %qD should return %qT", decl, arg);
9369 else if (unary_op_p (operator_code))
9374 error ("%qD must take %<void%>", decl);
9376 error ("%qD must take exactly one argument", decl);
9380 else /* if (binary_op_p (operator_code)) */
9385 error ("%qD must take exactly one argument", decl);
9387 error ("%qD must take exactly two arguments", decl);
9391 /* More Effective C++ rule 7. */
9393 && (operator_code == TRUTH_ANDIF_EXPR
9394 || operator_code == TRUTH_ORIF_EXPR
9395 || operator_code == COMPOUND_EXPR))
9396 warning (OPT_Weffc__, "user-defined %qD always evaluates both arguments",
9400 /* Effective C++ rule 23. */
9403 && !DECL_ASSIGNMENT_OPERATOR_P (decl)
9404 && (operator_code == PLUS_EXPR
9405 || operator_code == MINUS_EXPR
9406 || operator_code == TRUNC_DIV_EXPR
9407 || operator_code == MULT_EXPR
9408 || operator_code == TRUNC_MOD_EXPR)
9409 && TREE_CODE (TREE_TYPE (TREE_TYPE (decl))) == REFERENCE_TYPE)
9410 warning (OPT_Weffc__, "%qD should return by value", decl);
9413 for (; argtypes && argtypes != void_list_node;
9414 argtypes = TREE_CHAIN (argtypes))
9415 if (TREE_PURPOSE (argtypes))
9417 TREE_PURPOSE (argtypes) = NULL_TREE;
9418 if (operator_code == POSTINCREMENT_EXPR
9419 || operator_code == POSTDECREMENT_EXPR)
9422 pedwarn ("%qD cannot have default arguments", decl);
9426 error ("%qD cannot have default arguments", decl);
9434 /* Return a string giving the keyword associate with CODE. */
9437 tag_name (enum tag_types code)
9456 /* Name lookup in an elaborated-type-specifier (after the keyword
9457 indicated by TAG_CODE) has found the TYPE_DECL DECL. If the
9458 elaborated-type-specifier is invalid, issue a diagnostic and return
9459 error_mark_node; otherwise, return the *_TYPE to which it referred.
9460 If ALLOW_TEMPLATE_P is true, TYPE may be a class template. */
9463 check_elaborated_type_specifier (enum tag_types tag_code,
9465 bool allow_template_p)
9471 struct S { struct S *p; };
9473 name lookup will find the TYPE_DECL for the implicit "S::S"
9474 typedef. Adjust for that here. */
9475 if (DECL_SELF_REFERENCE_P (decl))
9476 decl = TYPE_NAME (TREE_TYPE (decl));
9478 type = TREE_TYPE (decl);
9480 /* Check TEMPLATE_TYPE_PARM first because DECL_IMPLICIT_TYPEDEF_P
9481 is false for this case as well. */
9482 if (TREE_CODE (type) == TEMPLATE_TYPE_PARM)
9484 error ("using template type parameter %qT after %qs",
9485 type, tag_name (tag_code));
9486 return error_mark_node;
9490 If the identifier resolves to a typedef-name or a template
9491 type-parameter, the elaborated-type-specifier is ill-formed.
9493 In other words, the only legitimate declaration to use in the
9494 elaborated type specifier is the implicit typedef created when
9495 the type is declared. */
9496 else if (!DECL_IMPLICIT_TYPEDEF_P (decl)
9497 && tag_code != typename_type)
9499 error ("using typedef-name %qD after %qs", decl, tag_name (tag_code));
9500 error ("%q+D has a previous declaration here", decl);
9501 return error_mark_node;
9503 else if (TREE_CODE (type) != RECORD_TYPE
9504 && TREE_CODE (type) != UNION_TYPE
9505 && tag_code != enum_type
9506 && tag_code != typename_type)
9508 error ("%qT referred to as %qs", type, tag_name (tag_code));
9509 error ("%q+T has a previous declaration here", type);
9510 return error_mark_node;
9512 else if (TREE_CODE (type) != ENUMERAL_TYPE
9513 && tag_code == enum_type)
9515 error ("%qT referred to as enum", type);
9516 error ("%q+T has a previous declaration here", type);
9517 return error_mark_node;
9519 else if (!allow_template_p
9520 && TREE_CODE (type) == RECORD_TYPE
9521 && CLASSTYPE_IS_TEMPLATE (type))
9523 /* If a class template appears as elaborated type specifier
9524 without a template header such as:
9526 template <class T> class C {};
9527 void f(class C); // No template header here
9529 then the required template argument is missing. */
9530 error ("template argument required for %<%s %T%>",
9531 tag_name (tag_code),
9532 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type)));
9533 return error_mark_node;
9539 /* Lookup NAME in elaborate type specifier in scope according to
9540 SCOPE and issue diagnostics if necessary.
9541 Return *_TYPE node upon success, NULL_TREE when the NAME is not
9542 found, and ERROR_MARK_NODE for type error. */
9545 lookup_and_check_tag (enum tag_types tag_code, tree name,
9546 tag_scope scope, bool template_header_p)
9550 if (scope == ts_global)
9552 /* First try ordinary name lookup, ignoring hidden class name
9553 injected via friend declaration. */
9554 decl = lookup_name_prefer_type (name, 2);
9555 /* If that fails, the name will be placed in the smallest
9556 non-class, non-function-prototype scope according to 3.3.1/5.
9557 We may already have a hidden name declared as friend in this
9558 scope. So lookup again but not ignoring hidden names.
9559 If we find one, that name will be made visible rather than
9560 creating a new tag. */
9562 decl = lookup_type_scope (name, ts_within_enclosing_non_class);
9565 decl = lookup_type_scope (name, scope);
9567 if (decl && DECL_CLASS_TEMPLATE_P (decl))
9568 decl = DECL_TEMPLATE_RESULT (decl);
9570 if (decl && TREE_CODE (decl) == TYPE_DECL)
9572 /* Look for invalid nested type:
9576 if (scope == ts_current && DECL_SELF_REFERENCE_P (decl))
9578 error ("%qD has the same name as the class in which it is "
9581 return error_mark_node;
9584 /* Two cases we need to consider when deciding if a class
9585 template is allowed as an elaborated type specifier:
9586 1. It is a self reference to its own class.
9587 2. It comes with a template header.
9591 template <class T> class C {
9592 class C *c1; // DECL_SELF_REFERENCE_P is true
9595 template <class U> class C; // template_header_p is true
9596 template <class T> class C<T>::D {
9597 class C *c2; // DECL_SELF_REFERENCE_P is true
9600 t = check_elaborated_type_specifier (tag_code,
9603 | DECL_SELF_REFERENCE_P (decl));
9610 /* Get the struct, enum or union (TAG_CODE says which) with tag NAME.
9611 Define the tag as a forward-reference if it is not defined.
9613 If a declaration is given, process it here, and report an error if
9614 multiple declarations are not identical.
9616 SCOPE is TS_CURRENT when this is also a definition. Only look in
9617 the current frame for the name (since C++ allows new names in any
9618 scope.) It is TS_WITHIN_ENCLOSING_NON_CLASS if this is a friend
9619 declaration. Only look beginning from the current scope outward up
9620 till the nearest non-class scope. Otherwise it is TS_GLOBAL.
9622 TEMPLATE_HEADER_P is true when this declaration is preceded by
9623 a set of template parameters. */
9626 xref_tag (enum tag_types tag_code, tree name,
9627 tag_scope scope, bool template_header_p)
9629 enum tree_code code;
9631 tree context = NULL_TREE;
9633 timevar_push (TV_NAME_LOOKUP);
9635 gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE);
9647 code = ENUMERAL_TYPE;
9653 /* In case of anonymous name, xref_tag is only called to
9654 make type node and push name. Name lookup is not required. */
9655 if (ANON_AGGRNAME_P (name))
9658 t = lookup_and_check_tag (tag_code, name,
9659 scope, template_header_p);
9661 if (t == error_mark_node)
9662 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
9664 if (scope != ts_current && t && current_class_type
9665 && template_class_depth (current_class_type)
9666 && template_header_p)
9668 /* Since SCOPE is not TS_CURRENT, we are not looking at a
9669 definition of this tag. Since, in addition, we are currently
9670 processing a (member) template declaration of a template
9671 class, we must be very careful; consider:
9678 { template <class V>
9679 friend struct S1; };
9681 Here, the S2::S1 declaration should not be confused with the
9682 outer declaration. In particular, the inner version should
9683 have a template parameter of level 2, not level 1. This
9684 would be particularly important if the member declaration
9687 template <class V = U> friend struct S1;
9689 say, when we should tsubst into `U' when instantiating
9690 S2. On the other hand, when presented with:
9700 we must find the inner binding eventually. We
9701 accomplish this by making sure that the new type we
9702 create to represent this declaration has the right
9704 context = TYPE_CONTEXT (t);
9710 /* If no such tag is yet defined, create a forward-reference node
9711 and record it as the "definition".
9712 When a real declaration of this type is found,
9713 the forward-reference will be altered into a real type. */
9714 if (code == ENUMERAL_TYPE)
9716 error ("use of enum %q#D without previous declaration", name);
9717 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
9721 t = make_aggr_type (code);
9722 TYPE_CONTEXT (t) = context;
9723 t = pushtag (name, t, scope);
9728 if (template_header_p && IS_AGGR_TYPE (t))
9730 if (!redeclare_class_template (t, current_template_parms))
9731 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
9733 else if (!processing_template_decl
9735 && CLASSTYPE_IS_TEMPLATE (t))
9737 error ("redeclaration of %qT as a non-template", t);
9738 error ("previous declaration %q+D", t);
9739 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
9742 /* Make injected friend class visible. */
9743 if (scope != ts_within_enclosing_non_class
9744 && hidden_name_p (TYPE_NAME (t)))
9746 DECL_ANTICIPATED (TYPE_NAME (t)) = 0;
9747 DECL_FRIEND_P (TYPE_NAME (t)) = 0;
9749 if (TYPE_TEMPLATE_INFO (t))
9751 DECL_ANTICIPATED (TYPE_TI_TEMPLATE (t)) = 0;
9752 DECL_FRIEND_P (TYPE_TI_TEMPLATE (t)) = 0;
9757 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, t);
9761 xref_tag_from_type (tree old, tree id, tag_scope scope)
9763 enum tag_types tag_kind;
9765 if (TREE_CODE (old) == RECORD_TYPE)
9766 tag_kind = (CLASSTYPE_DECLARED_CLASS (old) ? class_type : record_type);
9768 tag_kind = union_type;
9770 if (id == NULL_TREE)
9771 id = TYPE_IDENTIFIER (old);
9773 return xref_tag (tag_kind, id, scope, false);
9776 /* Create the binfo hierarchy for REF with (possibly NULL) base list
9777 BASE_LIST. For each element on BASE_LIST the TREE_PURPOSE is an
9778 access_* node, and the TREE_VALUE is the type of the base-class.
9779 Non-NULL TREE_TYPE indicates virtual inheritance.
9781 Returns true if the binfo heirarchy was successfully created,
9782 false if an error was detected. */
9785 xref_basetypes (tree ref, tree base_list)
9788 tree binfo, base_binfo;
9789 unsigned max_vbases = 0; /* Maximum direct & indirect virtual bases. */
9790 unsigned max_bases = 0; /* Maximum direct bases. */
9792 tree default_access;
9793 tree igo_prev; /* Track Inheritance Graph Order. */
9795 if (ref == error_mark_node)
9798 /* The base of a derived class is private by default, all others are
9800 default_access = (TREE_CODE (ref) == RECORD_TYPE
9801 && CLASSTYPE_DECLARED_CLASS (ref)
9802 ? access_private_node : access_public_node);
9804 /* First, make sure that any templates in base-classes are
9805 instantiated. This ensures that if we call ourselves recursively
9806 we do not get confused about which classes are marked and which
9811 tree basetype = TREE_VALUE (*basep);
9813 if (!(processing_template_decl && uses_template_parms (basetype))
9814 && !complete_type_or_else (basetype, NULL))
9815 /* An incomplete type. Remove it from the list. */
9816 *basep = TREE_CHAIN (*basep);
9820 if (TREE_TYPE (*basep))
9822 if (CLASS_TYPE_P (basetype))
9823 max_vbases += VEC_length (tree, CLASSTYPE_VBASECLASSES (basetype));
9824 basep = &TREE_CHAIN (*basep);
9828 TYPE_MARKED_P (ref) = 1;
9830 /* The binfo slot should be empty, unless this is an (ill-formed)
9832 gcc_assert (!TYPE_BINFO (ref) || TYPE_SIZE (ref));
9833 gcc_assert (TYPE_MAIN_VARIANT (ref) == ref);
9835 binfo = make_tree_binfo (max_bases);
9837 TYPE_BINFO (ref) = binfo;
9838 BINFO_OFFSET (binfo) = size_zero_node;
9839 BINFO_TYPE (binfo) = ref;
9843 BINFO_BASE_ACCESSES (binfo) = VEC_alloc (tree, gc, max_bases);
9844 /* An aggregate cannot have baseclasses. */
9845 CLASSTYPE_NON_AGGREGATE (ref) = 1;
9847 if (TREE_CODE (ref) == UNION_TYPE)
9849 error ("derived union %qT invalid", ref);
9856 if (TYPE_FOR_JAVA (ref))
9858 error ("Java class %qT cannot have multiple bases", ref);
9865 CLASSTYPE_VBASECLASSES (ref) = VEC_alloc (tree, gc, max_vbases);
9867 if (TYPE_FOR_JAVA (ref))
9869 error ("Java class %qT cannot have virtual bases", ref);
9874 for (igo_prev = binfo; base_list; base_list = TREE_CHAIN (base_list))
9876 tree access = TREE_PURPOSE (base_list);
9877 int via_virtual = TREE_TYPE (base_list) != NULL_TREE;
9878 tree basetype = TREE_VALUE (base_list);
9880 if (access == access_default_node)
9881 access = default_access;
9883 if (TREE_CODE (basetype) == TYPE_DECL)
9884 basetype = TREE_TYPE (basetype);
9885 if (TREE_CODE (basetype) != RECORD_TYPE
9886 && TREE_CODE (basetype) != TYPENAME_TYPE
9887 && TREE_CODE (basetype) != TEMPLATE_TYPE_PARM
9888 && TREE_CODE (basetype) != BOUND_TEMPLATE_TEMPLATE_PARM)
9890 error ("base type %qT fails to be a struct or class type",
9895 if (TYPE_FOR_JAVA (basetype) && (current_lang_depth () == 0))
9896 TYPE_FOR_JAVA (ref) = 1;
9898 base_binfo = NULL_TREE;
9899 if (CLASS_TYPE_P (basetype) && !dependent_type_p (basetype))
9901 base_binfo = TYPE_BINFO (basetype);
9902 /* The original basetype could have been a typedef'd type. */
9903 basetype = BINFO_TYPE (base_binfo);
9905 /* Inherit flags from the base. */
9906 TYPE_HAS_NEW_OPERATOR (ref)
9907 |= TYPE_HAS_NEW_OPERATOR (basetype);
9908 TYPE_HAS_ARRAY_NEW_OPERATOR (ref)
9909 |= TYPE_HAS_ARRAY_NEW_OPERATOR (basetype);
9910 TYPE_GETS_DELETE (ref) |= TYPE_GETS_DELETE (basetype);
9911 TYPE_HAS_CONVERSION (ref) |= TYPE_HAS_CONVERSION (basetype);
9912 CLASSTYPE_DIAMOND_SHAPED_P (ref)
9913 |= CLASSTYPE_DIAMOND_SHAPED_P (basetype);
9914 CLASSTYPE_REPEATED_BASE_P (ref)
9915 |= CLASSTYPE_REPEATED_BASE_P (basetype);
9918 /* We must do this test after we've seen through a typedef
9920 if (TYPE_MARKED_P (basetype))
9922 if (basetype == ref)
9923 error ("recursive type %qT undefined", basetype);
9925 error ("duplicate base type %qT invalid", basetype);
9928 TYPE_MARKED_P (basetype) = 1;
9930 base_binfo = copy_binfo (base_binfo, basetype, ref,
9931 &igo_prev, via_virtual);
9932 if (!BINFO_INHERITANCE_CHAIN (base_binfo))
9933 BINFO_INHERITANCE_CHAIN (base_binfo) = binfo;
9935 BINFO_BASE_APPEND (binfo, base_binfo);
9936 BINFO_BASE_ACCESS_APPEND (binfo, access);
9939 if (VEC_space (tree, CLASSTYPE_VBASECLASSES (ref), 1))
9940 /* If we have space in the vbase vector, we must have shared at
9941 least one of them, and are therefore diamond shaped. */
9942 CLASSTYPE_DIAMOND_SHAPED_P (ref) = 1;
9944 /* Unmark all the types. */
9945 for (i = 0; BINFO_BASE_ITERATE (binfo, i, base_binfo); i++)
9946 TYPE_MARKED_P (BINFO_TYPE (base_binfo)) = 0;
9947 TYPE_MARKED_P (ref) = 0;
9949 /* Now see if we have a repeated base type. */
9950 if (!CLASSTYPE_REPEATED_BASE_P (ref))
9952 for (base_binfo = binfo; base_binfo;
9953 base_binfo = TREE_CHAIN (base_binfo))
9955 if (TYPE_MARKED_P (BINFO_TYPE (base_binfo)))
9957 CLASSTYPE_REPEATED_BASE_P (ref) = 1;
9960 TYPE_MARKED_P (BINFO_TYPE (base_binfo)) = 1;
9962 for (base_binfo = binfo; base_binfo;
9963 base_binfo = TREE_CHAIN (base_binfo))
9964 if (TYPE_MARKED_P (BINFO_TYPE (base_binfo)))
9965 TYPE_MARKED_P (BINFO_TYPE (base_binfo)) = 0;
9974 /* Begin compiling the definition of an enumeration type.
9976 Returns the type object, as yet incomplete.
9977 Also records info about it so that build_enumerator
9978 may be used to declare the individual values as they are read. */
9981 start_enum (tree name)
9985 gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE);
9987 /* If this is the real definition for a previous forward reference,
9988 fill in the contents in the same object that used to be the
9989 forward reference. */
9991 enumtype = lookup_and_check_tag (enum_type, name,
9992 /*tag_scope=*/ts_current,
9993 /*template_header_p=*/false);
9995 if (enumtype != NULL_TREE && TREE_CODE (enumtype) == ENUMERAL_TYPE)
9997 error ("multiple definition of %q#T", enumtype);
9998 error ("%Jprevious definition here", TYPE_MAIN_DECL (enumtype));
9999 /* Clear out TYPE_VALUES, and start again. */
10000 TYPE_VALUES (enumtype) = NULL_TREE;
10004 /* In case of error, make a dummy enum to allow parsing to
10006 if (enumtype == error_mark_node)
10007 name = make_anon_name ();
10009 enumtype = make_node (ENUMERAL_TYPE);
10010 enumtype = pushtag (name, enumtype, /*tag_scope=*/ts_current);
10016 /* After processing and defining all the values of an enumeration type,
10017 install their decls in the enumeration type and finish it off.
10018 ENUMTYPE is the type object and VALUES a list of name-value pairs. */
10021 finish_enum (tree enumtype)
10030 bool use_short_enum;
10034 integer_type_kind itk;
10035 tree underlying_type = NULL_TREE;
10037 /* We built up the VALUES in reverse order. */
10038 TYPE_VALUES (enumtype) = nreverse (TYPE_VALUES (enumtype));
10040 /* For an enum defined in a template, just set the type of the values;
10041 all further processing is postponed until the template is
10042 instantiated. We need to set the type so that tsubst of a CONST_DECL
10044 if (processing_template_decl)
10046 for (values = TYPE_VALUES (enumtype);
10048 values = TREE_CHAIN (values))
10049 TREE_TYPE (TREE_VALUE (values)) = enumtype;
10050 if (at_function_scope_p ())
10051 add_stmt (build_min (TAG_DEFN, enumtype));
10055 /* Determine the minimum and maximum values of the enumerators. */
10056 if (TYPE_VALUES (enumtype))
10058 minnode = maxnode = NULL_TREE;
10060 for (values = TYPE_VALUES (enumtype);
10062 values = TREE_CHAIN (values))
10064 decl = TREE_VALUE (values);
10066 /* [dcl.enum]: Following the closing brace of an enum-specifier,
10067 each enumerator has the type of its enumeration. Prior to the
10068 closing brace, the type of each enumerator is the type of its
10069 initializing value. */
10070 TREE_TYPE (decl) = enumtype;
10072 /* Update the minimum and maximum values, if appropriate. */
10073 value = DECL_INITIAL (decl);
10074 if (value == error_mark_node)
10075 value = integer_zero_node;
10076 /* Figure out what the minimum and maximum values of the
10077 enumerators are. */
10079 minnode = maxnode = value;
10080 else if (tree_int_cst_lt (maxnode, value))
10082 else if (tree_int_cst_lt (value, minnode))
10089 If the enumerator-list is empty, the underlying type is as if
10090 the enumeration had a single enumerator with value 0. */
10091 minnode = maxnode = integer_zero_node;
10093 /* Compute the number of bits require to represent all values of the
10094 enumeration. We must do this before the type of MINNODE and
10095 MAXNODE are transformed, since min_precision relies on the
10096 TREE_TYPE of the value it is passed. */
10097 unsignedp = tree_int_cst_sgn (minnode) >= 0;
10098 lowprec = min_precision (minnode, unsignedp);
10099 highprec = min_precision (maxnode, unsignedp);
10100 precision = MAX (lowprec, highprec);
10102 /* Determine the underlying type of the enumeration.
10106 The underlying type of an enumeration is an integral type that
10107 can represent all the enumerator values defined in the
10108 enumeration. It is implementation-defined which integral type is
10109 used as the underlying type for an enumeration except that the
10110 underlying type shall not be larger than int unless the value of
10111 an enumerator cannot fit in an int or unsigned int.
10113 We use "int" or an "unsigned int" as the underlying type, even if
10114 a smaller integral type would work, unless the user has
10115 explicitly requested that we use the smallest possible type. The
10116 user can request that for all enumerations with a command line
10117 flag, or for just one enumeration with an attribute. */
10119 use_short_enum = flag_short_enums
10120 || lookup_attribute ("packed", TYPE_ATTRIBUTES (enumtype));
10122 for (itk = (use_short_enum ? itk_char : itk_int);
10126 underlying_type = integer_types[itk];
10127 if (TYPE_PRECISION (underlying_type) >= precision
10128 && TYPE_UNSIGNED (underlying_type) == unsignedp)
10131 if (itk == itk_none)
10135 IF no integral type can represent all the enumerator values, the
10136 enumeration is ill-formed. */
10137 error ("no integral type can represent all of the enumerator values "
10138 "for %qT", enumtype);
10139 precision = TYPE_PRECISION (long_long_integer_type_node);
10140 underlying_type = integer_types[itk_unsigned_long_long];
10143 /* Compute the minium and maximum values for the type.
10147 For an enumeration where emin is the smallest enumerator and emax
10148 is the largest, the values of the enumeration are the values of the
10149 underlying type in the range bmin to bmax, where bmin and bmax are,
10150 respectively, the smallest and largest values of the smallest bit-
10151 field that can store emin and emax. */
10153 /* The middle-end currently assumes that types with TYPE_PRECISION
10154 narrower than their underlying type are suitably zero or sign
10155 extended to fill their mode. g++ doesn't make these guarantees.
10156 Until the middle-end can represent such paradoxical types, we
10157 set the TYPE_PRECISION to the width of the underlying type. */
10158 TYPE_PRECISION (enumtype) = TYPE_PRECISION (underlying_type);
10160 set_min_and_max_values_for_integral_type (enumtype, precision, unsignedp);
10164 The value of sizeof() applied to an enumeration type, an object
10165 of an enumeration type, or an enumerator, is the value of sizeof()
10166 applied to the underlying type. */
10167 TYPE_SIZE (enumtype) = TYPE_SIZE (underlying_type);
10168 TYPE_SIZE_UNIT (enumtype) = TYPE_SIZE_UNIT (underlying_type);
10169 TYPE_MODE (enumtype) = TYPE_MODE (underlying_type);
10170 TYPE_ALIGN (enumtype) = TYPE_ALIGN (underlying_type);
10171 TYPE_USER_ALIGN (enumtype) = TYPE_USER_ALIGN (underlying_type);
10172 TYPE_UNSIGNED (enumtype) = TYPE_UNSIGNED (underlying_type);
10174 /* Convert each of the enumerators to the type of the underlying
10175 type of the enumeration. */
10176 for (values = TYPE_VALUES (enumtype); values; values = TREE_CHAIN (values))
10178 location_t saved_location;
10180 decl = TREE_VALUE (values);
10181 saved_location = input_location;
10182 input_location = DECL_SOURCE_LOCATION (decl);
10183 value = perform_implicit_conversion (underlying_type,
10184 DECL_INITIAL (decl));
10185 input_location = saved_location;
10187 /* Do not clobber shared ints. */
10188 value = copy_node (value);
10190 TREE_TYPE (value) = enumtype;
10191 DECL_INITIAL (decl) = value;
10192 TREE_VALUE (values) = value;
10195 /* Fix up all variant types of this enum type. */
10196 for (t = TYPE_MAIN_VARIANT (enumtype); t; t = TYPE_NEXT_VARIANT (t))
10198 TYPE_VALUES (t) = TYPE_VALUES (enumtype);
10199 TYPE_MIN_VALUE (t) = TYPE_MIN_VALUE (enumtype);
10200 TYPE_MAX_VALUE (t) = TYPE_MAX_VALUE (enumtype);
10201 TYPE_SIZE (t) = TYPE_SIZE (enumtype);
10202 TYPE_SIZE_UNIT (t) = TYPE_SIZE_UNIT (enumtype);
10203 TYPE_MODE (t) = TYPE_MODE (enumtype);
10204 TYPE_PRECISION (t) = TYPE_PRECISION (enumtype);
10205 TYPE_ALIGN (t) = TYPE_ALIGN (enumtype);
10206 TYPE_USER_ALIGN (t) = TYPE_USER_ALIGN (enumtype);
10207 TYPE_UNSIGNED (t) = TYPE_UNSIGNED (enumtype);
10210 /* Finish debugging output for this type. */
10211 rest_of_type_compilation (enumtype, namespace_bindings_p ());
10214 /* Build and install a CONST_DECL for an enumeration constant of the
10215 enumeration type ENUMTYPE whose NAME and VALUE (if any) are provided.
10216 Assignment of sequential values by default is handled here. */
10219 build_enumerator (tree name, tree value, tree enumtype)
10225 /* If the VALUE was erroneous, pretend it wasn't there; that will
10226 result in the enum being assigned the next value in sequence. */
10227 if (value == error_mark_node)
10230 /* Remove no-op casts from the value. */
10232 STRIP_TYPE_NOPS (value);
10234 if (! processing_template_decl)
10236 /* Validate and default VALUE. */
10237 if (value != NULL_TREE)
10239 value = integral_constant_value (value);
10241 if (TREE_CODE (value) == INTEGER_CST)
10243 value = perform_integral_promotions (value);
10244 constant_expression_warning (value);
10248 error ("enumerator value for %qD not integer constant", name);
10253 /* Default based on previous value. */
10254 if (value == NULL_TREE)
10256 if (TYPE_VALUES (enumtype))
10259 unsigned HOST_WIDE_INT lo;
10263 /* The next value is the previous value plus one. We can
10264 safely assume that the previous value is an INTEGER_CST.
10265 add_double doesn't know the type of the target expression,
10266 so we must check with int_fits_type_p as well. */
10267 prev_value = DECL_INITIAL (TREE_VALUE (TYPE_VALUES (enumtype)));
10268 overflowed = add_double (TREE_INT_CST_LOW (prev_value),
10269 TREE_INT_CST_HIGH (prev_value),
10271 value = build_int_cst_wide (TREE_TYPE (prev_value), lo, hi);
10272 overflowed |= !int_fits_type_p (value, TREE_TYPE (prev_value));
10276 error ("overflow in enumeration values at %qD", name);
10277 value = error_mark_node;
10281 value = integer_zero_node;
10284 /* Remove no-op casts from the value. */
10285 STRIP_TYPE_NOPS (value);
10288 /* C++ associates enums with global, function, or class declarations. */
10289 context = current_scope ();
10291 /* Build the actual enumeration constant. Note that the enumeration
10292 constants have the type of their initializers until the
10293 enumeration is complete:
10297 Following the closing brace of an enum-specifier, each enumer-
10298 ator has the type of its enumeration. Prior to the closing
10299 brace, the type of each enumerator is the type of its
10300 initializing value.
10302 In finish_enum we will reset the type. Of course, if we're
10303 processing a template, there may be no value. */
10304 type = value ? TREE_TYPE (value) : NULL_TREE;
10306 if (context && context == current_class_type)
10307 /* This enum declaration is local to the class. We need the full
10308 lang_decl so that we can record DECL_CLASS_CONTEXT, for example. */
10309 decl = build_lang_decl (CONST_DECL, name, type);
10311 /* It's a global enum, or it's local to a function. (Note local to
10312 a function could mean local to a class method. */
10313 decl = build_decl (CONST_DECL, name, type);
10315 DECL_CONTEXT (decl) = FROB_CONTEXT (context);
10316 TREE_CONSTANT (decl) = 1;
10317 TREE_INVARIANT (decl) = 1;
10318 TREE_READONLY (decl) = 1;
10319 DECL_INITIAL (decl) = value;
10321 if (context && context == current_class_type)
10322 /* In something like `struct S { enum E { i = 7 }; };' we put `i'
10323 on the TYPE_FIELDS list for `S'. (That's so that you can say
10324 things like `S::i' later.) */
10325 finish_member_declaration (decl);
10329 /* Add this enumeration constant to the list for this type. */
10330 TYPE_VALUES (enumtype) = tree_cons (name, decl, TYPE_VALUES (enumtype));
10334 /* We're defining DECL. Make sure that it's type is OK. */
10337 check_function_type (tree decl, tree current_function_parms)
10339 tree fntype = TREE_TYPE (decl);
10340 tree return_type = complete_type (TREE_TYPE (fntype));
10342 /* In a function definition, arg types must be complete. */
10343 require_complete_types_for_parms (current_function_parms);
10345 if (dependent_type_p (return_type))
10347 if (!COMPLETE_OR_VOID_TYPE_P (return_type))
10349 tree args = TYPE_ARG_TYPES (fntype);
10351 error ("return type %q#T is incomplete", return_type);
10353 /* Make it return void instead. */
10354 if (TREE_CODE (fntype) == METHOD_TYPE)
10355 fntype = build_method_type_directly (TREE_TYPE (TREE_VALUE (args)),
10357 TREE_CHAIN (args));
10359 fntype = build_function_type (void_type_node, args);
10361 = build_exception_variant (fntype,
10362 TYPE_RAISES_EXCEPTIONS (TREE_TYPE (decl)));
10365 abstract_virtuals_error (decl, TREE_TYPE (fntype));
10368 /* Create the FUNCTION_DECL for a function definition.
10369 DECLSPECS and DECLARATOR are the parts of the declaration;
10370 they describe the function's name and the type it returns,
10371 but twisted together in a fashion that parallels the syntax of C.
10373 FLAGS is a bitwise or of SF_PRE_PARSED (indicating that the
10374 DECLARATOR is really the DECL for the function we are about to
10375 process and that DECLSPECS should be ignored), SF_INCLASS_INLINE
10376 indicating that the function is an inline defined in-class.
10378 This function creates a binding context for the function body
10379 as well as setting up the FUNCTION_DECL in current_function_decl.
10381 For C++, we must first check whether that datum makes any sense.
10382 For example, "class A local_a(1,2);" means that variable local_a
10383 is an aggregate of type A, which should have a constructor
10384 applied to it with the argument list [1, 2]. */
10387 start_preparsed_function (tree decl1, tree attrs, int flags)
10389 tree ctype = NULL_TREE;
10392 int doing_friend = 0;
10393 struct cp_binding_level *bl;
10394 tree current_function_parms;
10395 struct c_fileinfo *finfo
10396 = get_fileinfo (LOCATION_FILE (DECL_SOURCE_LOCATION (decl1)));
10397 bool honor_interface;
10399 /* Sanity check. */
10400 gcc_assert (TREE_CODE (TREE_VALUE (void_list_node)) == VOID_TYPE);
10401 gcc_assert (TREE_CHAIN (void_list_node) == NULL_TREE);
10403 fntype = TREE_TYPE (decl1);
10404 if (TREE_CODE (fntype) == METHOD_TYPE)
10405 ctype = TYPE_METHOD_BASETYPE (fntype);
10407 /* ISO C++ 11.4/5. A friend function defined in a class is in
10408 the (lexical) scope of the class in which it is defined. */
10409 if (!ctype && DECL_FRIEND_P (decl1))
10411 ctype = DECL_FRIEND_CONTEXT (decl1);
10413 /* CTYPE could be null here if we're dealing with a template;
10414 for example, `inline friend float foo()' inside a template
10415 will have no CTYPE set. */
10416 if (ctype && TREE_CODE (ctype) != RECORD_TYPE)
10422 if (DECL_DECLARED_INLINE_P (decl1)
10423 && lookup_attribute ("noinline", attrs))
10424 warning (0, "inline function %q+D given attribute noinline", decl1);
10426 if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (decl1))
10427 /* This is a constructor, we must ensure that any default args
10428 introduced by this definition are propagated to the clones
10429 now. The clones are used directly in overload resolution. */
10430 adjust_clone_args (decl1);
10432 /* Sometimes we don't notice that a function is a static member, and
10433 build a METHOD_TYPE for it. Fix that up now. */
10434 if (ctype != NULL_TREE && DECL_STATIC_FUNCTION_P (decl1)
10435 && TREE_CODE (TREE_TYPE (decl1)) == METHOD_TYPE)
10437 revert_static_member_fn (decl1);
10441 /* Set up current_class_type, and enter the scope of the class, if
10444 push_nested_class (ctype);
10445 else if (DECL_STATIC_FUNCTION_P (decl1))
10446 push_nested_class (DECL_CONTEXT (decl1));
10448 /* Now that we have entered the scope of the class, we must restore
10449 the bindings for any template parameters surrounding DECL1, if it
10450 is an inline member template. (Order is important; consider the
10451 case where a template parameter has the same name as a field of
10452 the class.) It is not until after this point that
10453 PROCESSING_TEMPLATE_DECL is guaranteed to be set up correctly. */
10454 if (flags & SF_INCLASS_INLINE)
10455 maybe_begin_member_template_processing (decl1);
10457 /* Effective C++ rule 15. */
10459 && DECL_OVERLOADED_OPERATOR_P (decl1) == NOP_EXPR
10460 && TREE_CODE (TREE_TYPE (fntype)) == VOID_TYPE)
10461 warning (OPT_Weffc__, "%<operator=%> should return a reference to %<*this%>");
10463 /* Make the init_value nonzero so pushdecl knows this is not tentative.
10464 error_mark_node is replaced below (in poplevel) with the BLOCK. */
10465 if (!DECL_INITIAL (decl1))
10466 DECL_INITIAL (decl1) = error_mark_node;
10468 /* This function exists in static storage.
10469 (This does not mean `static' in the C sense!) */
10470 TREE_STATIC (decl1) = 1;
10472 /* We must call push_template_decl after current_class_type is set
10473 up. (If we are processing inline definitions after exiting a
10474 class scope, current_class_type will be NULL_TREE until set above
10475 by push_nested_class.) */
10476 if (processing_template_decl)
10478 /* FIXME: Handle error_mark_node more gracefully. */
10479 tree newdecl1 = push_template_decl (decl1);
10480 if (newdecl1 != error_mark_node)
10484 /* We are now in the scope of the function being defined. */
10485 current_function_decl = decl1;
10487 /* Save the parm names or decls from this function's declarator
10488 where store_parm_decls will find them. */
10489 current_function_parms = DECL_ARGUMENTS (decl1);
10491 /* Make sure the parameter and return types are reasonable. When
10492 you declare a function, these types can be incomplete, but they
10493 must be complete when you define the function. */
10494 check_function_type (decl1, current_function_parms);
10496 /* Build the return declaration for the function. */
10497 restype = TREE_TYPE (fntype);
10498 /* Promote the value to int before returning it. */
10499 if (c_promoting_integer_type_p (restype))
10500 restype = type_promotes_to (restype);
10501 if (DECL_RESULT (decl1) == NULL_TREE)
10505 resdecl = build_decl (RESULT_DECL, 0, TYPE_MAIN_VARIANT (restype));
10506 DECL_ARTIFICIAL (resdecl) = 1;
10507 DECL_IGNORED_P (resdecl) = 1;
10508 DECL_RESULT (decl1) = resdecl;
10510 cp_apply_type_quals_to_decl (cp_type_quals (restype), resdecl);
10513 /* Initialize RTL machinery. We cannot do this until
10514 CURRENT_FUNCTION_DECL and DECL_RESULT are set up. We do this
10515 even when processing a template; this is how we get
10516 CFUN set up, and our per-function variables initialized.
10517 FIXME factor out the non-RTL stuff. */
10518 bl = current_binding_level;
10519 allocate_struct_function (decl1);
10520 current_binding_level = bl;
10522 /* Even though we're inside a function body, we still don't want to
10523 call expand_expr to calculate the size of a variable-sized array.
10524 We haven't necessarily assigned RTL to all variables yet, so it's
10525 not safe to try to expand expressions involving them. */
10526 cfun->x_dont_save_pending_sizes_p = 1;
10528 /* Start the statement-tree, start the tree now. */
10529 DECL_SAVED_TREE (decl1) = push_stmt_list ();
10531 /* Let the user know we're compiling this function. */
10532 announce_function (decl1);
10534 /* Record the decl so that the function name is defined.
10535 If we already have a decl for this name, and it is a FUNCTION_DECL,
10536 use the old decl. */
10537 if (!processing_template_decl && !(flags & SF_PRE_PARSED))
10539 /* A specialization is not used to guide overload resolution. */
10540 if (!DECL_FUNCTION_MEMBER_P (decl1)
10541 && !(DECL_USE_TEMPLATE (decl1) &&
10542 PRIMARY_TEMPLATE_P (DECL_TI_TEMPLATE (decl1))))
10544 tree olddecl = pushdecl (decl1);
10546 if (olddecl == error_mark_node)
10547 /* If something went wrong when registering the declaration,
10548 use DECL1; we have to have a FUNCTION_DECL to use when
10549 parsing the body of the function. */
10552 /* Otherwise, OLDDECL is either a previous declaration of
10553 the same function or DECL1 itself. */
10558 /* We need to set the DECL_CONTEXT. */
10559 if (!DECL_CONTEXT (decl1) && DECL_TEMPLATE_INFO (decl1))
10560 DECL_CONTEXT (decl1) = DECL_CONTEXT (DECL_TI_TEMPLATE (decl1));
10562 fntype = TREE_TYPE (decl1);
10564 /* If #pragma weak applies, mark the decl appropriately now.
10565 The pragma only applies to global functions. Because
10566 determining whether or not the #pragma applies involves
10567 computing the mangled name for the declaration, we cannot
10568 apply the pragma until after we have merged this declaration
10569 with any previous declarations; if the original declaration
10570 has a linkage specification, that specification applies to
10571 the definition as well, and may affect the mangled name. */
10572 if (!DECL_CONTEXT (decl1))
10573 maybe_apply_pragma_weak (decl1);
10576 /* Reset these in case the call to pushdecl changed them. */
10577 current_function_decl = decl1;
10578 cfun->decl = decl1;
10580 /* If we are (erroneously) defining a function that we have already
10581 defined before, wipe out what we knew before. */
10582 if (!DECL_PENDING_INLINE_P (decl1))
10583 DECL_SAVED_FUNCTION_DATA (decl1) = NULL;
10585 if (ctype && !doing_friend && !DECL_STATIC_FUNCTION_P (decl1))
10587 /* We know that this was set up by `grokclassfn'. We do not
10588 wait until `store_parm_decls', since evil parse errors may
10589 never get us to that point. Here we keep the consistency
10590 between `current_class_type' and `current_class_ptr'. */
10591 tree t = DECL_ARGUMENTS (decl1);
10593 gcc_assert (t != NULL_TREE && TREE_CODE (t) == PARM_DECL);
10594 gcc_assert (TREE_CODE (TREE_TYPE (t)) == POINTER_TYPE);
10596 cp_function_chain->x_current_class_ref
10597 = build_indirect_ref (t, NULL);
10598 cp_function_chain->x_current_class_ptr = t;
10600 /* Constructors and destructors need to know whether they're "in
10601 charge" of initializing virtual base classes. */
10602 t = TREE_CHAIN (t);
10603 if (DECL_HAS_IN_CHARGE_PARM_P (decl1))
10605 current_in_charge_parm = t;
10606 t = TREE_CHAIN (t);
10608 if (DECL_HAS_VTT_PARM_P (decl1))
10610 gcc_assert (DECL_NAME (t) == vtt_parm_identifier);
10611 current_vtt_parm = t;
10615 honor_interface = (!DECL_TEMPLATE_INSTANTIATION (decl1)
10616 /* Implicitly-defined methods (like the
10617 destructor for a class in which no destructor
10618 is explicitly declared) must not be defined
10619 until their definition is needed. So, we
10620 ignore interface specifications for
10621 compiler-generated functions. */
10622 && !DECL_ARTIFICIAL (decl1));
10624 if (DECL_INTERFACE_KNOWN (decl1))
10626 tree ctx = decl_function_context (decl1);
10628 if (DECL_NOT_REALLY_EXTERN (decl1))
10629 DECL_EXTERNAL (decl1) = 0;
10631 if (ctx != NULL_TREE && DECL_DECLARED_INLINE_P (ctx)
10632 && TREE_PUBLIC (ctx))
10633 /* This is a function in a local class in an extern inline
10635 comdat_linkage (decl1);
10637 /* If this function belongs to an interface, it is public.
10638 If it belongs to someone else's interface, it is also external.
10639 This only affects inlines and template instantiations. */
10640 else if (!finfo->interface_unknown && honor_interface)
10642 if (DECL_DECLARED_INLINE_P (decl1)
10643 || DECL_TEMPLATE_INSTANTIATION (decl1)
10644 || processing_template_decl)
10646 DECL_EXTERNAL (decl1)
10647 = (finfo->interface_only
10648 || (DECL_DECLARED_INLINE_P (decl1)
10649 && ! flag_implement_inlines
10650 && !DECL_VINDEX (decl1)));
10652 /* For WIN32 we also want to put these in linkonce sections. */
10653 maybe_make_one_only (decl1);
10656 DECL_EXTERNAL (decl1) = 0;
10657 DECL_INTERFACE_KNOWN (decl1) = 1;
10658 /* If this function is in an interface implemented in this file,
10659 make sure that the backend knows to emit this function
10661 if (!DECL_EXTERNAL (decl1))
10662 mark_needed (decl1);
10664 else if (finfo->interface_unknown && finfo->interface_only
10665 && honor_interface)
10667 /* If MULTIPLE_SYMBOL_SPACES is defined and we saw a #pragma
10668 interface, we will have both finfo->interface_unknown and
10669 finfo->interface_only set. In that case, we don't want to
10670 use the normal heuristics because someone will supply a
10671 #pragma implementation elsewhere, and deducing it here would
10672 produce a conflict. */
10673 comdat_linkage (decl1);
10674 DECL_EXTERNAL (decl1) = 0;
10675 DECL_INTERFACE_KNOWN (decl1) = 1;
10676 DECL_DEFER_OUTPUT (decl1) = 1;
10680 /* This is a definition, not a reference.
10681 So clear DECL_EXTERNAL. */
10682 DECL_EXTERNAL (decl1) = 0;
10684 if ((DECL_DECLARED_INLINE_P (decl1)
10685 || DECL_TEMPLATE_INSTANTIATION (decl1))
10686 && ! DECL_INTERFACE_KNOWN (decl1)
10687 /* Don't try to defer nested functions for now. */
10688 && ! decl_function_context (decl1))
10689 DECL_DEFER_OUTPUT (decl1) = 1;
10691 DECL_INTERFACE_KNOWN (decl1) = 1;
10694 /* Determine the ELF visibility attribute for the function. We must not
10695 do this before calling "pushdecl", as we must allow "duplicate_decls"
10696 to merge any attributes appropriately. We also need to wait until
10698 if (!DECL_CLONED_FUNCTION_P (decl1))
10699 determine_visibility (decl1);
10701 begin_scope (sk_function_parms, decl1);
10705 if (DECL_DESTRUCTOR_P (decl1)
10706 || (DECL_CONSTRUCTOR_P (decl1)
10707 && targetm.cxx.cdtor_returns_this ()))
10709 cdtor_label = build_decl (LABEL_DECL, NULL_TREE, NULL_TREE);
10710 DECL_CONTEXT (cdtor_label) = current_function_decl;
10713 start_fname_decls ();
10715 store_parm_decls (current_function_parms);
10719 /* Like start_preparsed_function, except that instead of a
10720 FUNCTION_DECL, this function takes DECLSPECS and DECLARATOR.
10722 Returns 1 on success. If the DECLARATOR is not suitable for a function
10723 (it defines a datum instead), we return 0, which tells
10724 yyparse to report a parse error. */
10727 start_function (cp_decl_specifier_seq *declspecs,
10728 const cp_declarator *declarator,
10733 decl1 = grokdeclarator (declarator, declspecs, FUNCDEF, 1, &attrs);
10734 /* If the declarator is not suitable for a function definition,
10735 cause a syntax error. */
10736 if (decl1 == NULL_TREE || TREE_CODE (decl1) != FUNCTION_DECL)
10739 if (DECL_MAIN_P (decl1))
10740 /* main must return int. grokfndecl should have corrected it
10741 (and issued a diagnostic) if the user got it wrong. */
10742 gcc_assert (same_type_p (TREE_TYPE (TREE_TYPE (decl1)),
10743 integer_type_node));
10745 start_preparsed_function (decl1, attrs, /*flags=*/SF_DEFAULT);
10750 /* Returns true iff an EH_SPEC_BLOCK should be created in the body of
10754 use_eh_spec_block (tree fn)
10756 return (flag_exceptions && flag_enforce_eh_specs
10757 && !processing_template_decl
10758 && TYPE_RAISES_EXCEPTIONS (TREE_TYPE (fn))
10759 /* We insert the EH_SPEC_BLOCK only in the original
10760 function; then, it is copied automatically to the
10762 && !DECL_CLONED_FUNCTION_P (fn)
10763 /* Implicitly-generated constructors and destructors have
10764 exception specifications. However, those specifications
10765 are the union of the possible exceptions specified by the
10766 constructors/destructors for bases and members, so no
10767 unallowed exception will ever reach this function. By
10768 not creating the EH_SPEC_BLOCK we save a little memory,
10769 and we avoid spurious warnings about unreachable
10771 && !DECL_ARTIFICIAL (fn));
10774 /* Store the parameter declarations into the current function declaration.
10775 This is called after parsing the parameter declarations, before
10776 digesting the body of the function.
10778 Also install to binding contour return value identifier, if any. */
10781 store_parm_decls (tree current_function_parms)
10783 tree fndecl = current_function_decl;
10786 /* This is a chain of any other decls that came in among the parm
10787 declarations. If a parm is declared with enum {foo, bar} x;
10788 then CONST_DECLs for foo and bar are put here. */
10789 tree nonparms = NULL_TREE;
10791 if (current_function_parms)
10793 /* This case is when the function was defined with an ANSI prototype.
10794 The parms already have decls, so we need not do anything here
10795 except record them as in effect
10796 and complain if any redundant old-style parm decls were written. */
10798 tree specparms = current_function_parms;
10801 /* Must clear this because it might contain TYPE_DECLs declared
10803 current_binding_level->names = NULL;
10805 /* If we're doing semantic analysis, then we'll call pushdecl
10806 for each of these. We must do them in reverse order so that
10807 they end in the correct forward order. */
10808 specparms = nreverse (specparms);
10810 for (parm = specparms; parm; parm = next)
10812 next = TREE_CHAIN (parm);
10813 if (TREE_CODE (parm) == PARM_DECL)
10815 if (DECL_NAME (parm) == NULL_TREE
10816 || TREE_CODE (parm) != VOID_TYPE)
10819 error ("parameter %qD declared void", parm);
10823 /* If we find an enum constant or a type tag,
10824 put it aside for the moment. */
10825 TREE_CHAIN (parm) = NULL_TREE;
10826 nonparms = chainon (nonparms, parm);
10830 /* Get the decls in their original chain order and record in the
10831 function. This is all and only the PARM_DECLs that were
10832 pushed into scope by the loop above. */
10833 DECL_ARGUMENTS (fndecl) = getdecls ();
10836 DECL_ARGUMENTS (fndecl) = NULL_TREE;
10838 /* Now store the final chain of decls for the arguments
10839 as the decl-chain of the current lexical scope.
10840 Put the enumerators in as well, at the front so that
10841 DECL_ARGUMENTS is not modified. */
10842 current_binding_level->names = chainon (nonparms, DECL_ARGUMENTS (fndecl));
10844 if (use_eh_spec_block (current_function_decl))
10845 current_eh_spec_block = begin_eh_spec_block ();
10849 /* We have finished doing semantic analysis on DECL, but have not yet
10850 generated RTL for its body. Save away our current state, so that
10851 when we want to generate RTL later we know what to do. */
10854 save_function_data (tree decl)
10856 struct language_function *f;
10858 /* Save the language-specific per-function data so that we can
10859 get it back when we really expand this function. */
10860 gcc_assert (!DECL_PENDING_INLINE_P (decl));
10863 f = GGC_NEW (struct language_function);
10864 memcpy (f, cp_function_chain, sizeof (struct language_function));
10865 DECL_SAVED_FUNCTION_DATA (decl) = f;
10867 /* Clear out the bits we don't need. */
10868 f->base.x_stmt_tree.x_cur_stmt_list = NULL_TREE;
10869 f->bindings = NULL;
10870 f->x_local_names = NULL;
10874 /* Set the return value of the constructor (if present). */
10877 finish_constructor_body (void)
10882 if (targetm.cxx.cdtor_returns_this ())
10884 /* Any return from a constructor will end up here. */
10885 add_stmt (build_stmt (LABEL_EXPR, cdtor_label));
10887 val = DECL_ARGUMENTS (current_function_decl);
10888 val = build2 (MODIFY_EXPR, TREE_TYPE (val),
10889 DECL_RESULT (current_function_decl), val);
10890 /* Return the address of the object. */
10891 exprstmt = build_stmt (RETURN_EXPR, val);
10892 add_stmt (exprstmt);
10896 /* Do all the processing for the beginning of a destructor; set up the
10897 vtable pointers and cleanups for bases and members. */
10900 begin_destructor_body (void)
10902 tree compound_stmt;
10904 /* If the CURRENT_CLASS_TYPE is incomplete, we will have already
10905 issued an error message. We still want to try to process the
10906 body of the function, but initialize_vtbl_ptrs will crash if
10907 TYPE_BINFO is NULL. */
10908 if (COMPLETE_TYPE_P (current_class_type))
10910 compound_stmt = begin_compound_stmt (0);
10911 /* Make all virtual function table pointers in non-virtual base
10912 classes point to CURRENT_CLASS_TYPE's virtual function
10914 initialize_vtbl_ptrs (current_class_ptr);
10915 finish_compound_stmt (compound_stmt);
10917 /* And insert cleanups for our bases and members so that they
10918 will be properly destroyed if we throw. */
10919 push_base_cleanups ();
10923 /* At the end of every destructor we generate code to delete the object if
10924 necessary. Do that now. */
10927 finish_destructor_body (void)
10931 /* Any return from a destructor will end up here; that way all base
10932 and member cleanups will be run when the function returns. */
10933 add_stmt (build_stmt (LABEL_EXPR, cdtor_label));
10935 /* In a virtual destructor, we must call delete. */
10936 if (DECL_VIRTUAL_P (current_function_decl))
10939 tree virtual_size = cxx_sizeof (current_class_type);
10943 At the point of definition of a virtual destructor (including
10944 an implicit definition), non-placement operator delete shall
10945 be looked up in the scope of the destructor's class and if
10946 found shall be accessible and unambiguous. */
10947 exprstmt = build_op_delete_call(DELETE_EXPR, current_class_ptr,
10949 /*global_p=*/false,
10950 /*placement=*/NULL_TREE,
10951 /*alloc_fn=*/NULL_TREE);
10953 if_stmt = begin_if_stmt ();
10954 finish_if_stmt_cond (build2 (BIT_AND_EXPR, integer_type_node,
10955 current_in_charge_parm,
10958 finish_expr_stmt (exprstmt);
10959 finish_then_clause (if_stmt);
10960 finish_if_stmt (if_stmt);
10963 if (targetm.cxx.cdtor_returns_this ())
10967 val = DECL_ARGUMENTS (current_function_decl);
10968 val = build2 (MODIFY_EXPR, TREE_TYPE (val),
10969 DECL_RESULT (current_function_decl), val);
10970 /* Return the address of the object. */
10971 exprstmt = build_stmt (RETURN_EXPR, val);
10972 add_stmt (exprstmt);
10976 /* Do the necessary processing for the beginning of a function body, which
10977 in this case includes member-initializers, but not the catch clauses of
10978 a function-try-block. Currently, this means opening a binding level
10979 for the member-initializers (in a ctor) and member cleanups (in a dtor). */
10982 begin_function_body (void)
10986 if (! FUNCTION_NEEDS_BODY_BLOCK (current_function_decl))
10989 if (processing_template_decl)
10990 /* Do nothing now. */;
10992 /* Always keep the BLOCK node associated with the outermost pair of
10993 curly braces of a function. These are needed for correct
10994 operation of dwarfout.c. */
10995 keep_next_level (true);
10997 stmt = begin_compound_stmt (BCS_FN_BODY);
10999 if (processing_template_decl)
11000 /* Do nothing now. */;
11001 else if (DECL_DESTRUCTOR_P (current_function_decl))
11002 begin_destructor_body ();
11007 /* Do the processing for the end of a function body. Currently, this means
11008 closing out the cleanups for fully-constructed bases and members, and in
11009 the case of the destructor, deleting the object if desired. Again, this
11010 is only meaningful for [cd]tors, since they are the only functions where
11011 there is a significant distinction between the main body and any
11012 function catch clauses. Handling, say, main() return semantics here
11013 would be wrong, as flowing off the end of a function catch clause for
11014 main() would also need to return 0. */
11017 finish_function_body (tree compstmt)
11019 if (compstmt == NULL_TREE)
11022 /* Close the block. */
11023 finish_compound_stmt (compstmt);
11025 if (processing_template_decl)
11026 /* Do nothing now. */;
11027 else if (DECL_CONSTRUCTOR_P (current_function_decl))
11028 finish_constructor_body ();
11029 else if (DECL_DESTRUCTOR_P (current_function_decl))
11030 finish_destructor_body ();
11033 /* Given a function, returns the BLOCK corresponding to the outermost level
11034 of curly braces, skipping the artificial block created for constructor
11038 outer_curly_brace_block (tree fndecl)
11040 tree block = BLOCK_SUBBLOCKS (DECL_INITIAL (fndecl));
11041 if (FUNCTION_NEEDS_BODY_BLOCK (current_function_decl))
11042 /* Skip the artificial function body block. */
11043 block = BLOCK_SUBBLOCKS (block);
11047 /* Finish up a function declaration and compile that function
11048 all the way to assembler language output. The free the storage
11049 for the function definition.
11051 FLAGS is a bitwise or of the following values:
11053 We just finished processing the body of an in-class inline
11054 function definition. (This processing will have taken place
11055 after the class definition is complete.) */
11058 finish_function (int flags)
11060 tree fndecl = current_function_decl;
11061 tree fntype, ctype = NULL_TREE;
11062 int inclass_inline = (flags & 2) != 0;
11065 /* When we get some parse errors, we can end up without a
11066 current_function_decl, so cope. */
11067 if (fndecl == NULL_TREE)
11068 return error_mark_node;
11070 if (DECL_NONSTATIC_MEMBER_FUNCTION_P (fndecl)
11071 && DECL_VIRTUAL_P (fndecl)
11072 && !processing_template_decl)
11074 tree fnclass = DECL_CONTEXT (fndecl);
11075 if (fndecl == CLASSTYPE_KEY_METHOD (fnclass))
11076 keyed_classes = tree_cons (NULL_TREE, fnclass, keyed_classes);
11079 nested = function_depth > 1;
11080 fntype = TREE_TYPE (fndecl);
11082 /* TREE_READONLY (fndecl) = 1;
11083 This caused &foo to be of type ptr-to-const-function
11084 which then got a warning when stored in a ptr-to-function variable. */
11086 gcc_assert (building_stmt_tree ());
11088 /* For a cloned function, we've already got all the code we need;
11089 there's no need to add any extra bits. */
11090 if (!DECL_CLONED_FUNCTION_P (fndecl))
11092 if (DECL_MAIN_P (current_function_decl))
11096 /* Make it so that `main' always returns 0 by default (or
11099 stmt = finish_return_stmt (integer_one_node);
11101 stmt = finish_return_stmt (integer_zero_node);
11103 /* Hack. We don't want the middle-end to warn that this
11104 return is unreachable, so put the statement on the
11106 #ifdef USE_MAPPED_LOCATION
11107 SET_EXPR_LOCATION (stmt, UNKNOWN_LOCATION);
11109 annotate_with_file_line (stmt, input_filename, 0);
11113 if (use_eh_spec_block (current_function_decl))
11114 finish_eh_spec_block (TYPE_RAISES_EXCEPTIONS
11115 (TREE_TYPE (current_function_decl)),
11116 current_eh_spec_block);
11119 /* If we're saving up tree structure, tie off the function now. */
11120 DECL_SAVED_TREE (fndecl) = pop_stmt_list (DECL_SAVED_TREE (fndecl));
11122 finish_fname_decls ();
11124 /* If this function can't throw any exceptions, remember that. */
11125 if (!processing_template_decl
11126 && !cp_function_chain->can_throw
11127 && !flag_non_call_exceptions
11128 && targetm.binds_local_p (fndecl))
11129 TREE_NOTHROW (fndecl) = 1;
11131 /* This must come after expand_function_end because cleanups might
11132 have declarations (from inline functions) that need to go into
11133 this function's blocks. */
11135 /* If the current binding level isn't the outermost binding level
11136 for this function, either there is a bug, or we have experienced
11137 syntax errors and the statement tree is malformed. */
11138 if (current_binding_level->kind != sk_function_parms)
11140 /* Make sure we have already experienced errors. */
11141 gcc_assert (errorcount);
11143 /* Throw away the broken statement tree and extra binding
11145 DECL_SAVED_TREE (fndecl) = alloc_stmt_list ();
11147 while (current_binding_level->kind != sk_function_parms)
11149 if (current_binding_level->kind == sk_class)
11150 pop_nested_class ();
11152 poplevel (0, 0, 0);
11155 poplevel (1, 0, 1);
11157 /* Statements should always be full-expressions at the outermost set
11158 of curly braces for a function. */
11159 gcc_assert (stmts_are_full_exprs_p ());
11161 /* Set up the named return value optimization, if we can. Candidate
11162 variables are selected in check_return_value. */
11163 if (current_function_return_value)
11165 tree r = current_function_return_value;
11168 if (r != error_mark_node
11169 /* This is only worth doing for fns that return in memory--and
11170 simpler, since we don't have to worry about promoted modes. */
11171 && aggregate_value_p (TREE_TYPE (TREE_TYPE (fndecl)), fndecl)
11172 /* Only allow this for variables declared in the outer scope of
11173 the function so we know that their lifetime always ends with a
11174 return; see g++.dg/opt/nrv6.C. We could be more flexible if
11175 we were to do this optimization in tree-ssa. */
11176 && (outer = outer_curly_brace_block (fndecl))
11177 && chain_member (r, BLOCK_VARS (outer)))
11178 finalize_nrv (&DECL_SAVED_TREE (fndecl), r, DECL_RESULT (fndecl));
11180 current_function_return_value = NULL_TREE;
11183 /* Remember that we were in class scope. */
11184 if (current_class_name)
11185 ctype = current_class_type;
11187 /* Must mark the RESULT_DECL as being in this function. */
11188 DECL_CONTEXT (DECL_RESULT (fndecl)) = fndecl;
11190 /* Set the BLOCK_SUPERCONTEXT of the outermost function scope to point
11191 to the FUNCTION_DECL node itself. */
11192 BLOCK_SUPERCONTEXT (DECL_INITIAL (fndecl)) = fndecl;
11194 /* Save away current state, if appropriate. */
11195 if (!processing_template_decl)
11196 save_function_data (fndecl);
11198 /* Complain if there's just no return statement. */
11199 if (warn_return_type
11200 && TREE_CODE (TREE_TYPE (fntype)) != VOID_TYPE
11201 && !dependent_type_p (TREE_TYPE (fntype))
11202 && !current_function_returns_value && !current_function_returns_null
11203 /* Don't complain if we abort or throw. */
11204 && !current_function_returns_abnormally
11205 && !DECL_NAME (DECL_RESULT (fndecl))
11206 /* Normally, with -Wreturn-type, flow will complain. Unless we're an
11207 inline function, as we might never be compiled separately. */
11208 && (DECL_INLINE (fndecl) || processing_template_decl)
11209 /* Structor return values (if any) are set by the compiler. */
11210 && !DECL_CONSTRUCTOR_P (fndecl)
11211 && !DECL_DESTRUCTOR_P (fndecl))
11212 warning (OPT_Wreturn_type, "no return statement in function returning non-void");
11214 /* Store the end of the function, so that we get good line number
11215 info for the epilogue. */
11216 cfun->function_end_locus = input_location;
11218 /* Genericize before inlining. */
11219 if (!processing_template_decl)
11221 struct language_function *f = DECL_SAVED_FUNCTION_DATA (fndecl);
11222 cp_genericize (fndecl);
11223 /* Clear out the bits we don't need. */
11224 f->x_current_class_ptr = NULL;
11225 f->x_current_class_ref = NULL;
11226 f->x_eh_spec_block = NULL;
11227 f->x_in_charge_parm = NULL;
11228 f->x_vtt_parm = NULL;
11229 f->x_return_value = NULL;
11230 f->bindings = NULL;
11231 f->extern_decl_map = NULL;
11233 /* Handle attribute((warn_unused_result)). Relies on gimple input. */
11234 c_warn_unused_result (&DECL_SAVED_TREE (fndecl));
11236 /* Clear out the bits we don't need. */
11237 local_names = NULL;
11239 /* We're leaving the context of this function, so zap cfun. It's still in
11240 DECL_STRUCT_FUNCTION, and we'll restore it in tree_rest_of_compilation. */
11242 current_function_decl = NULL;
11244 /* If this is an in-class inline definition, we may have to pop the
11245 bindings for the template parameters that we added in
11246 maybe_begin_member_template_processing when start_function was
11248 if (inclass_inline)
11249 maybe_end_member_template_processing ();
11251 /* Leave the scope of the class. */
11253 pop_nested_class ();
11259 /* Let the error reporting routines know that we're outside a
11260 function. For a nested function, this value is used in
11261 cxx_pop_function_context and then reset via pop_function_context. */
11262 current_function_decl = NULL_TREE;
11267 /* Create the FUNCTION_DECL for a function definition.
11268 DECLSPECS and DECLARATOR are the parts of the declaration;
11269 they describe the return type and the name of the function,
11270 but twisted together in a fashion that parallels the syntax of C.
11272 This function creates a binding context for the function body
11273 as well as setting up the FUNCTION_DECL in current_function_decl.
11275 Returns a FUNCTION_DECL on success.
11277 If the DECLARATOR is not suitable for a function (it defines a datum
11278 instead), we return 0, which tells yyparse to report a parse error.
11280 May return void_type_node indicating that this method is actually
11281 a friend. See grokfield for more details.
11283 Came here with a `.pushlevel' .
11285 DO NOT MAKE ANY CHANGES TO THIS CODE WITHOUT MAKING CORRESPONDING
11286 CHANGES TO CODE IN `grokfield'. */
11289 start_method (cp_decl_specifier_seq *declspecs,
11290 const cp_declarator *declarator, tree attrlist)
11292 tree fndecl = grokdeclarator (declarator, declspecs, MEMFUNCDEF, 0,
11295 if (fndecl == error_mark_node)
11296 return error_mark_node;
11298 if (fndecl == NULL || TREE_CODE (fndecl) != FUNCTION_DECL)
11300 error ("invalid member function declaration");
11301 return error_mark_node;
11305 cplus_decl_attributes (&fndecl, attrlist, 0);
11307 /* Pass friends other than inline friend functions back. */
11308 if (fndecl == void_type_node)
11311 if (DECL_IN_AGGR_P (fndecl))
11313 if (DECL_CONTEXT (fndecl)
11314 && TREE_CODE (DECL_CONTEXT (fndecl)) != NAMESPACE_DECL)
11315 error ("%qD is already defined in class %qT", fndecl,
11316 DECL_CONTEXT (fndecl));
11317 return error_mark_node;
11320 check_template_shadow (fndecl);
11322 DECL_DECLARED_INLINE_P (fndecl) = 1;
11323 if (flag_default_inline)
11324 DECL_INLINE (fndecl) = 1;
11326 /* We process method specializations in finish_struct_1. */
11327 if (processing_template_decl && !DECL_TEMPLATE_SPECIALIZATION (fndecl))
11329 fndecl = push_template_decl (fndecl);
11330 if (fndecl == error_mark_node)
11334 if (! DECL_FRIEND_P (fndecl))
11336 if (TREE_CHAIN (fndecl))
11338 fndecl = copy_node (fndecl);
11339 TREE_CHAIN (fndecl) = NULL_TREE;
11343 finish_decl (fndecl, NULL_TREE, NULL_TREE);
11345 /* Make a place for the parms. */
11346 begin_scope (sk_function_parms, fndecl);
11348 DECL_IN_AGGR_P (fndecl) = 1;
11352 /* Go through the motions of finishing a function definition.
11353 We don't compile this method until after the whole class has
11356 FINISH_METHOD must return something that looks as though it
11357 came from GROKFIELD (since we are defining a method, after all).
11359 This is called after parsing the body of the function definition.
11360 STMTS is the chain of statements that makes up the function body.
11362 DECL is the ..._DECL that `start_method' provided. */
11365 finish_method (tree decl)
11367 tree fndecl = decl;
11372 if (decl == void_type_node)
11375 old_initial = DECL_INITIAL (fndecl);
11377 /* Undo the level for the parms (from start_method).
11378 This is like poplevel, but it causes nothing to be
11379 saved. Saving information here confuses symbol-table
11380 output routines. Besides, this information will
11381 be correctly output when this method is actually
11384 /* Clear out the meanings of the local variables of this level;
11385 also record in each decl which block it belongs to. */
11387 for (link = current_binding_level->names; link; link = TREE_CHAIN (link))
11389 if (DECL_NAME (link) != NULL_TREE)
11390 pop_binding (DECL_NAME (link), link);
11391 gcc_assert (TREE_CODE (link) != FUNCTION_DECL);
11392 DECL_CONTEXT (link) = NULL_TREE;
11395 poplevel (0, 0, 0);
11397 DECL_INITIAL (fndecl) = old_initial;
11399 /* We used to check if the context of FNDECL was different from
11400 current_class_type as another way to get inside here. This didn't work
11401 for String.cc in libg++. */
11402 if (DECL_FRIEND_P (fndecl))
11404 VEC_safe_push (tree, gc, CLASSTYPE_INLINE_FRIENDS (current_class_type),
11406 decl = void_type_node;
11413 /* VAR is a VAR_DECL. If its type is incomplete, remember VAR so that
11414 we can lay it out later, when and if its type becomes complete. */
11417 maybe_register_incomplete_var (tree var)
11419 gcc_assert (TREE_CODE (var) == VAR_DECL);
11421 /* Keep track of variables with incomplete types. */
11422 if (!processing_template_decl && TREE_TYPE (var) != error_mark_node
11423 && DECL_EXTERNAL (var))
11425 tree inner_type = TREE_TYPE (var);
11427 while (TREE_CODE (inner_type) == ARRAY_TYPE)
11428 inner_type = TREE_TYPE (inner_type);
11429 inner_type = TYPE_MAIN_VARIANT (inner_type);
11431 if ((!COMPLETE_TYPE_P (inner_type) && CLASS_TYPE_P (inner_type))
11432 /* RTTI TD entries are created while defining the type_info. */
11433 || (TYPE_LANG_SPECIFIC (inner_type)
11434 && TYPE_BEING_DEFINED (inner_type)))
11435 incomplete_vars = tree_cons (inner_type, var, incomplete_vars);
11439 /* Called when a class type (given by TYPE) is defined. If there are
11440 any existing VAR_DECLs whose type hsa been completed by this
11441 declaration, update them now. */
11444 complete_vars (tree type)
11446 tree *list = &incomplete_vars;
11448 gcc_assert (CLASS_TYPE_P (type));
11451 if (same_type_p (type, TREE_PURPOSE (*list)))
11453 tree var = TREE_VALUE (*list);
11454 tree type = TREE_TYPE (var);
11455 /* Complete the type of the variable. The VAR_DECL itself
11456 will be laid out in expand_expr. */
11457 complete_type (type);
11458 cp_apply_type_quals_to_decl (cp_type_quals (type), var);
11459 /* Remove this entry from the list. */
11460 *list = TREE_CHAIN (*list);
11463 list = &TREE_CHAIN (*list);
11466 /* Check for pending declarations which may have abstract type. */
11467 complete_type_check_abstract (type);
11470 /* If DECL is of a type which needs a cleanup, build that cleanup
11474 cxx_maybe_build_cleanup (tree decl)
11476 tree type = TREE_TYPE (decl);
11478 if (type != error_mark_node && TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type))
11480 int flags = LOOKUP_NORMAL|LOOKUP_DESTRUCTOR;
11482 bool has_vbases = (TREE_CODE (type) == RECORD_TYPE
11483 && CLASSTYPE_VBASECLASSES (type));
11485 if (TREE_CODE (type) == ARRAY_TYPE)
11489 cxx_mark_addressable (decl);
11490 rval = build_unary_op (ADDR_EXPR, decl, 0);
11493 /* Optimize for space over speed here. */
11494 if (!has_vbases || flag_expensive_optimizations)
11495 flags |= LOOKUP_NONVIRTUAL;
11497 rval = build_delete (TREE_TYPE (rval), rval,
11498 sfk_complete_destructor, flags, 0);
11505 /* When a stmt has been parsed, this function is called. */
11512 /* DECL was originally constructed as a non-static member function,
11513 but turned out to be static. Update it accordingly. */
11516 revert_static_member_fn (tree decl)
11519 tree function = TREE_TYPE (decl);
11520 tree args = TYPE_ARG_TYPES (function);
11522 if (cp_type_quals (TREE_TYPE (TREE_VALUE (args)))
11523 != TYPE_UNQUALIFIED)
11524 error ("static member function %q#D declared with type qualifiers", decl);
11526 args = TREE_CHAIN (args);
11527 tmp = build_function_type (TREE_TYPE (function), args);
11528 tmp = build_qualified_type (tmp, cp_type_quals (function));
11529 tmp = build_exception_variant (tmp,
11530 TYPE_RAISES_EXCEPTIONS (function));
11531 TREE_TYPE (decl) = tmp;
11532 if (DECL_ARGUMENTS (decl))
11533 DECL_ARGUMENTS (decl) = TREE_CHAIN (DECL_ARGUMENTS (decl));
11534 DECL_STATIC_FUNCTION_P (decl) = 1;
11537 /* Initialize the variables used during compilation of a C++
11541 cxx_push_function_context (struct function * f)
11543 struct language_function *p = GGC_CNEW (struct language_function);
11546 /* Whenever we start a new function, we destroy temporaries in the
11548 current_stmt_tree ()->stmts_are_full_exprs_p = 1;
11554 if (DECL_SAVED_FUNCTION_DATA (fn))
11556 /* If we already parsed this function, and we're just expanding it
11557 now, restore saved state. */
11558 *cp_function_chain = *DECL_SAVED_FUNCTION_DATA (fn);
11560 /* We don't need the saved data anymore. Unless this is an inline
11561 function; we need the named return value info for
11562 declare_return_variable. */
11563 if (! DECL_INLINE (fn))
11564 DECL_SAVED_FUNCTION_DATA (fn) = NULL;
11569 /* Free the language-specific parts of F, now that we've finished
11570 compiling the function. */
11573 cxx_pop_function_context (struct function * f)
11578 /* Return which tree structure is used by T, or TS_CP_GENERIC if T is
11579 one of the language-independent trees. */
11581 enum cp_tree_node_structure_enum
11582 cp_tree_node_structure (union lang_tree_node * t)
11584 switch (TREE_CODE (&t->generic))
11586 case DEFAULT_ARG: return TS_CP_DEFAULT_ARG;
11587 case IDENTIFIER_NODE: return TS_CP_IDENTIFIER;
11588 case OVERLOAD: return TS_CP_OVERLOAD;
11589 case TEMPLATE_PARM_INDEX: return TS_CP_TPI;
11590 case TINST_LEVEL: return TS_CP_TINST_LEVEL;
11591 case PTRMEM_CST: return TS_CP_PTRMEM;
11592 case BASELINK: return TS_CP_BASELINK;
11593 default: return TS_CP_GENERIC;
11597 /* Build the void_list_node (void_type_node having been created). */
11599 build_void_list_node (void)
11601 tree t = build_tree_list (NULL_TREE, void_type_node);
11606 cp_missing_noreturn_ok_p (tree decl)
11608 /* A missing noreturn is ok for the `main' function. */
11609 return DECL_MAIN_P (decl);
11612 /* Return the COMDAT group into which DECL should be placed. */
11615 cxx_comdat_group (tree decl)
11619 /* Virtual tables, construction virtual tables, and virtual table
11620 tables all go in a single COMDAT group, named after the primary
11622 if (TREE_CODE (decl) == VAR_DECL && DECL_VTABLE_OR_VTT_P (decl))
11623 name = DECL_ASSEMBLER_NAME (CLASSTYPE_VTABLES (DECL_CONTEXT (decl)));
11624 /* For all other DECLs, the COMDAT group is the mangled name of the
11625 declaration itself. */
11628 while (DECL_THUNK_P (decl))
11630 /* If TARGET_USE_LOCAL_THUNK_ALIAS_P, use_thunk puts the thunk
11631 into the same section as the target function. In that case
11632 we must return target's name. */
11633 tree target = THUNK_TARGET (decl);
11634 if (TARGET_USE_LOCAL_THUNK_ALIAS_P (target)
11635 && DECL_SECTION_NAME (target) != NULL
11636 && DECL_ONE_ONLY (target))
11641 name = DECL_ASSEMBLER_NAME (decl);
11644 return IDENTIFIER_POINTER (name);
11647 #include "gt-cp-decl.h"