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. */
4489 pedwarn ("ISO C++ does not allow designated initializers");
4491 field = lookup_field_1 (type, d->cur->index, /*want_type=*/false);
4493 if (!field || TREE_CODE (field) != FIELD_DECL)
4495 error ("%qT has no non-static data member named %qD", type,
4497 return error_mark_node;
4501 /* If we processed all the member of the class, we are done. */
4505 field_init = reshape_init_r (TREE_TYPE (field), d,
4506 /*first_initializer_p=*/false);
4507 CONSTRUCTOR_APPEND_ELT (CONSTRUCTOR_ELTS (new_init), field, field_init);
4511 When a union is initialized with a brace-enclosed
4512 initializer, the braces shall only contain an
4513 initializer for the first member of the union. */
4514 if (TREE_CODE (type) == UNION_TYPE)
4517 field = next_initializable_field (TREE_CHAIN (field));
4523 /* Subroutine of reshape_init, which processes a single initializer (part of
4524 a CONSTRUCTOR). TYPE is the type of the variable being initialized, D is the
4525 iterator within the CONSTRUCTOR which points to the initializer to process.
4526 FIRST_INITIALIZER_P is true if this is the first initializer of the
4527 CONSTRUCTOR node. */
4530 reshape_init_r (tree type, reshape_iter *d, bool first_initializer_p)
4532 tree init = d->cur->value;
4534 /* A non-aggregate type is always initialized with a single
4536 if (!CP_AGGREGATE_TYPE_P (type))
4538 /* It is invalid to initialize a non-aggregate type with a
4539 brace-enclosed initializer.
4540 We need to check for BRACE_ENCLOSED_INITIALIZER_P here because
4541 of g++.old-deja/g++.mike/p7626.C: a pointer-to-member constant is
4542 a CONSTRUCTOR (with a record type). */
4543 if (TREE_CODE (init) == CONSTRUCTOR
4544 && BRACE_ENCLOSED_INITIALIZER_P (init)) /* p7626.C */
4546 error ("braces around scalar initializer for type %qT", type);
4547 init = error_mark_node;
4556 All implicit type conversions (clause _conv_) are considered when
4557 initializing the aggregate member with an initializer from an
4558 initializer-list. If the initializer can initialize a member,
4559 the member is initialized. Otherwise, if the member is itself a
4560 non-empty subaggregate, brace elision is assumed and the
4561 initializer is considered for the initialization of the first
4562 member of the subaggregate. */
4563 if (TREE_CODE (init) != CONSTRUCTOR
4564 && can_convert_arg (type, TREE_TYPE (init), init, LOOKUP_NORMAL))
4570 /* [dcl.init.string]
4572 A char array (whether plain char, signed char, or unsigned char)
4573 can be initialized by a string-literal (optionally enclosed in
4574 braces); a wchar_t array can be initialized by a wide
4575 string-literal (optionally enclosed in braces). */
4576 if (TREE_CODE (type) == ARRAY_TYPE
4577 && char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (type))))
4579 tree str_init = init;
4581 /* Strip one level of braces if and only if they enclose a single
4582 element (as allowed by [dcl.init.string]). */
4583 if (!first_initializer_p
4584 && TREE_CODE (str_init) == CONSTRUCTOR
4585 && VEC_length (constructor_elt, CONSTRUCTOR_ELTS (str_init)) == 1)
4587 str_init = VEC_index (constructor_elt,
4588 CONSTRUCTOR_ELTS (str_init), 0)->value;
4591 /* If it's a string literal, then it's the initializer for the array
4592 as a whole. Otherwise, continue with normal initialization for
4593 array types (one value per array element). */
4594 if (TREE_CODE (str_init) == STRING_CST)
4601 /* The following cases are about aggregates. If we are not within a full
4602 initializer already, and there is not a CONSTRUCTOR, it means that there
4603 is a missing set of braces (that is, we are processing the case for
4604 which reshape_init exists). */
4605 if (!first_initializer_p)
4607 if (TREE_CODE (init) == CONSTRUCTOR)
4609 /* For a nested compound literal, there is no need to reshape since
4610 brace elision is not allowed. Even if we decided to allow it,
4611 we should add a call to reshape_init in finish_compound_literal,
4612 before calling digest_init, so changing this code would still
4613 not be necessary. */
4614 if (!COMPOUND_LITERAL_P (init))
4617 gcc_assert (BRACE_ENCLOSED_INITIALIZER_P (init));
4618 return reshape_init (type, init);
4621 gcc_assert (!BRACE_ENCLOSED_INITIALIZER_P (init));
4624 warning (OPT_Wmissing_braces, "missing braces around initializer for %qT",
4628 /* Dispatch to specialized routines. */
4629 if (CLASS_TYPE_P (type))
4630 return reshape_init_class (type, d, first_initializer_p);
4631 else if (TREE_CODE (type) == ARRAY_TYPE)
4632 return reshape_init_array (type, d);
4633 else if (TREE_CODE (type) == VECTOR_TYPE)
4634 return reshape_init_vector (type, d);
4639 /* Undo the brace-elision allowed by [dcl.init.aggr] in a
4640 brace-enclosed aggregate initializer.
4642 INIT is the CONSTRUCTOR containing the list of initializers describing
4643 a brace-enclosed initializer for an entity of the indicated aggregate TYPE.
4644 It may not presently match the shape of the TYPE; for example:
4646 struct S { int a; int b; };
4647 struct S a[] = { 1, 2, 3, 4 };
4649 Here INIT will hold a VEC of four elements, rather than a
4650 VEC of two elements, each itself a VEC of two elements. This
4651 routine transforms INIT from the former form into the latter. The
4652 revised CONSTRUCTOR node is returned. */
4655 reshape_init (tree type, tree init)
4657 VEC(constructor_elt, gc) *v;
4661 gcc_assert (BRACE_ENCLOSED_INITIALIZER_P (init));
4663 v = CONSTRUCTOR_ELTS (init);
4665 /* An empty constructor does not need reshaping, and it is always a valid
4667 if (VEC_empty (constructor_elt, v))
4670 /* Recurse on this CONSTRUCTOR. */
4671 d.cur = VEC_index (constructor_elt, v, 0);
4672 d.end = d.cur + VEC_length (constructor_elt, v);
4674 new_init = reshape_init_r (type, &d, true);
4675 if (new_init == error_mark_node)
4676 return error_mark_node;
4678 /* Make sure all the element of the constructor were used. Otherwise,
4679 issue an error about exceeding initializers. */
4681 error ("too many initializers for %qT", type);
4686 /* Verify INIT (the initializer for DECL), and record the
4687 initialization in DECL_INITIAL, if appropriate. CLEANUP is as for
4688 grok_reference_init.
4690 If the return value is non-NULL, it is an expression that must be
4691 evaluated dynamically to initialize DECL. */
4694 check_initializer (tree decl, tree init, int flags, tree *cleanup)
4696 tree type = TREE_TYPE (decl);
4697 tree init_code = NULL;
4699 /* Things that are going to be initialized need to have complete
4701 TREE_TYPE (decl) = type = complete_type (TREE_TYPE (decl));
4703 if (type == error_mark_node)
4704 /* We will have already complained. */
4707 if (TREE_CODE (type) == ARRAY_TYPE)
4709 tree element_type = TREE_TYPE (type);
4711 /* The array type itself need not be complete, because the
4712 initializer may tell us how many elements are in the array.
4713 But, the elements of the array must be complete. */
4714 if (!COMPLETE_TYPE_P (complete_type (element_type)))
4716 error ("elements of array %q#D have incomplete type", decl);
4719 /* It is not valid to initialize an a VLA. */
4721 && ((COMPLETE_TYPE_P (type) && !TREE_CONSTANT (TYPE_SIZE (type)))
4722 || !TREE_CONSTANT (TYPE_SIZE (element_type))))
4724 error ("variable-sized object %qD may not be initialized", decl);
4728 else if (!COMPLETE_TYPE_P (type))
4730 error ("%qD has incomplete type", decl);
4731 TREE_TYPE (decl) = error_mark_node;
4735 /* There is no way to make a variable-sized class type in GNU C++. */
4736 gcc_assert (TREE_CONSTANT (TYPE_SIZE (type)));
4738 if (!CP_AGGREGATE_TYPE_P (type)
4739 && init && BRACE_ENCLOSED_INITIALIZER_P (init)
4740 && VEC_length (constructor_elt, CONSTRUCTOR_ELTS (init)) != 1)
4742 error ("scalar object %qD requires one element in initializer", decl);
4743 TREE_TYPE (decl) = error_mark_node;
4747 if (TREE_CODE (decl) == CONST_DECL)
4749 gcc_assert (TREE_CODE (type) != REFERENCE_TYPE);
4751 DECL_INITIAL (decl) = init;
4753 gcc_assert (init != NULL_TREE);
4756 else if (!DECL_EXTERNAL (decl) && TREE_CODE (type) == REFERENCE_TYPE)
4757 init = grok_reference_init (decl, type, init, cleanup);
4760 /* Do not reshape constructors of vectors (they don't need to be
4762 if (TREE_CODE (init) == CONSTRUCTOR
4763 && !COMPOUND_LITERAL_P (init)
4764 && !TREE_TYPE (init)) /* ptrmemfunc */
4766 init = reshape_init (type, init);
4768 if ((*targetm.vector_opaque_p) (type))
4770 error ("opaque vector types cannot be initialized");
4771 init = error_mark_node;
4775 /* If DECL has an array type without a specific bound, deduce the
4776 array size from the initializer. */
4777 maybe_deduce_size_from_array_init (decl, init);
4778 type = TREE_TYPE (decl);
4779 if (type == error_mark_node)
4782 if (TYPE_HAS_CONSTRUCTOR (type) || TYPE_NEEDS_CONSTRUCTING (type))
4784 if (TREE_CODE (type) == ARRAY_TYPE)
4785 goto initialize_aggr;
4786 else if (TREE_CODE (init) == CONSTRUCTOR)
4788 if (TYPE_NON_AGGREGATE_CLASS (type))
4790 error ("%qD must be initialized by constructor, "
4793 init = error_mark_node;
4796 goto dont_use_constructor;
4800 int saved_stmts_are_full_exprs_p;
4803 saved_stmts_are_full_exprs_p = 0;
4804 if (building_stmt_tree ())
4806 saved_stmts_are_full_exprs_p = stmts_are_full_exprs_p ();
4807 current_stmt_tree ()->stmts_are_full_exprs_p = 1;
4809 init = build_aggr_init (decl, init, flags);
4810 if (building_stmt_tree ())
4811 current_stmt_tree ()->stmts_are_full_exprs_p =
4812 saved_stmts_are_full_exprs_p;
4818 dont_use_constructor:
4819 if (TREE_CODE (init) != TREE_VEC)
4821 init_code = store_init_value (decl, init);
4822 if (pedantic && TREE_CODE (type) == ARRAY_TYPE
4823 && DECL_INITIAL (decl)
4824 && TREE_CODE (DECL_INITIAL (decl)) == STRING_CST
4825 && PAREN_STRING_LITERAL_P (DECL_INITIAL (decl)))
4826 warning (0, "array %qD initialized by parenthesized string literal %qE",
4827 decl, DECL_INITIAL (decl));
4832 else if (DECL_EXTERNAL (decl))
4834 else if (TYPE_P (type) && TYPE_NEEDS_CONSTRUCTING (type))
4835 goto initialize_aggr;
4836 else if (IS_AGGR_TYPE (type))
4838 tree core_type = strip_array_types (type);
4840 if (CLASSTYPE_READONLY_FIELDS_NEED_INIT (core_type))
4841 error ("structure %qD with uninitialized const members", decl);
4842 if (CLASSTYPE_REF_FIELDS_NEED_INIT (core_type))
4843 error ("structure %qD with uninitialized reference members", decl);
4845 check_for_uninitialized_const_var (decl);
4848 check_for_uninitialized_const_var (decl);
4850 if (init && init != error_mark_node)
4851 init_code = build2 (INIT_EXPR, type, decl, init);
4856 /* If DECL is not a local variable, give it RTL. */
4859 make_rtl_for_nonlocal_decl (tree decl, tree init, const char* asmspec)
4861 int toplev = toplevel_bindings_p ();
4863 const char *filename;
4865 /* Set the DECL_ASSEMBLER_NAME for the object. */
4868 /* The `register' keyword, when used together with an
4869 asm-specification, indicates that the variable should be
4870 placed in a particular register. */
4871 if (TREE_CODE (decl) == VAR_DECL && DECL_REGISTER (decl))
4873 set_user_assembler_name (decl, asmspec);
4874 DECL_HARD_REGISTER (decl) = 1;
4878 if (TREE_CODE (decl) == FUNCTION_DECL
4879 && DECL_BUILT_IN_CLASS (decl) == BUILT_IN_NORMAL)
4880 set_builtin_user_assembler_name (decl, asmspec);
4881 set_user_assembler_name (decl, asmspec);
4885 /* Handle non-variables up front. */
4886 if (TREE_CODE (decl) != VAR_DECL)
4888 rest_of_decl_compilation (decl, toplev, at_eof);
4892 /* If we see a class member here, it should be a static data
4894 if (DECL_LANG_SPECIFIC (decl) && DECL_IN_AGGR_P (decl))
4896 gcc_assert (TREE_STATIC (decl));
4897 /* An in-class declaration of a static data member should be
4898 external; it is only a declaration, and not a definition. */
4899 if (init == NULL_TREE)
4900 gcc_assert (DECL_EXTERNAL (decl));
4903 /* We don't create any RTL for local variables. */
4904 if (DECL_FUNCTION_SCOPE_P (decl) && !TREE_STATIC (decl))
4907 /* We defer emission of local statics until the corresponding
4908 DECL_EXPR is expanded. */
4909 defer_p = DECL_FUNCTION_SCOPE_P (decl) || DECL_VIRTUAL_P (decl);
4911 /* We try to defer namespace-scope static constants so that they are
4912 not emitted into the object file unnecessarily. */
4913 filename = input_filename;
4914 if (!DECL_VIRTUAL_P (decl)
4915 && TREE_READONLY (decl)
4916 && DECL_INITIAL (decl) != NULL_TREE
4917 && DECL_INITIAL (decl) != error_mark_node
4919 && ! EMPTY_CONSTRUCTOR_P (DECL_INITIAL (decl))
4921 && !TREE_PUBLIC (decl))
4923 /* Fool with the linkage of static consts according to #pragma
4925 struct c_fileinfo *finfo = get_fileinfo (filename);
4926 if (!finfo->interface_unknown && !TREE_PUBLIC (decl))
4928 TREE_PUBLIC (decl) = 1;
4929 DECL_EXTERNAL (decl) = finfo->interface_only;
4934 /* Likewise for template instantiations. */
4935 else if (DECL_LANG_SPECIFIC (decl)
4936 && DECL_IMPLICIT_INSTANTIATION (decl))
4939 /* If we're not deferring, go ahead and assemble the variable. */
4941 rest_of_decl_compilation (decl, toplev, at_eof);
4944 /* Generate code to initialize DECL (a local variable). */
4947 initialize_local_var (tree decl, tree init)
4949 tree type = TREE_TYPE (decl);
4952 gcc_assert (TREE_CODE (decl) == VAR_DECL
4953 || TREE_CODE (decl) == RESULT_DECL);
4954 gcc_assert (!TREE_STATIC (decl));
4956 if (DECL_SIZE (decl) == NULL_TREE)
4958 /* If we used it already as memory, it must stay in memory. */
4959 DECL_INITIAL (decl) = NULL_TREE;
4960 TREE_ADDRESSABLE (decl) = TREE_USED (decl);
4963 if (DECL_SIZE (decl) && type != error_mark_node)
4967 /* Compute and store the initial value. */
4968 already_used = TREE_USED (decl) || TREE_USED (type);
4970 /* Perform the initialization. */
4973 int saved_stmts_are_full_exprs_p;
4975 gcc_assert (building_stmt_tree ());
4976 saved_stmts_are_full_exprs_p = stmts_are_full_exprs_p ();
4977 current_stmt_tree ()->stmts_are_full_exprs_p = 1;
4978 finish_expr_stmt (init);
4979 current_stmt_tree ()->stmts_are_full_exprs_p =
4980 saved_stmts_are_full_exprs_p;
4983 /* Set this to 0 so we can tell whether an aggregate which was
4984 initialized was ever used. Don't do this if it has a
4985 destructor, so we don't complain about the 'resource
4986 allocation is initialization' idiom. Now set
4987 attribute((unused)) on types so decls of that type will be
4988 marked used. (see TREE_USED, above.) */
4989 if (TYPE_NEEDS_CONSTRUCTING (type)
4991 && TYPE_HAS_TRIVIAL_DESTRUCTOR (type)
4992 && DECL_NAME (decl))
4993 TREE_USED (decl) = 0;
4994 else if (already_used)
4995 TREE_USED (decl) = 1;
4998 /* Generate a cleanup, if necessary. */
4999 cleanup = cxx_maybe_build_cleanup (decl);
5000 if (DECL_SIZE (decl) && cleanup)
5001 finish_decl_cleanup (decl, cleanup);
5004 /* DECL is a VAR_DECL for a compiler-generated variable with static
5005 storage duration (like a virtual table) whose initializer is a
5006 compile-time constant. INIT must be either a TREE_LIST of values,
5007 or a CONSTRUCTOR. Initialize the variable and provide it to the
5011 initialize_artificial_var (tree decl, tree init)
5013 gcc_assert (DECL_ARTIFICIAL (decl));
5014 if (TREE_CODE (init) == TREE_LIST)
5015 init = build_constructor_from_list (NULL_TREE, init);
5016 gcc_assert (TREE_CODE (init) == CONSTRUCTOR);
5017 DECL_INITIAL (decl) = init;
5018 DECL_INITIALIZED_P (decl) = 1;
5019 determine_visibility (decl);
5020 layout_var_decl (decl);
5021 maybe_commonize_var (decl);
5022 make_rtl_for_nonlocal_decl (decl, init, /*asmspec=*/NULL);
5025 /* Finish processing of a declaration;
5026 install its line number and initial value.
5027 If the length of an array type is not known before,
5028 it must be determined now, from the initial value, or it is an error.
5030 INIT is the initializer (if any) for DECL. If INIT_CONST_EXPR_P is
5031 true, then INIT is an integral constant expression.
5033 FLAGS is LOOKUP_ONLYCONVERTING if the = init syntax was used, else 0
5034 if the (init) syntax was used. */
5037 cp_finish_decl (tree decl, tree init, bool init_const_expr_p,
5038 tree asmspec_tree, int flags)
5042 const char *asmspec = NULL;
5043 int was_readonly = 0;
5044 bool var_definition_p = false;
5045 int saved_processing_template_decl;
5047 if (decl == error_mark_node)
5052 error ("assignment (not initialization) in declaration");
5056 gcc_assert (TREE_CODE (decl) != RESULT_DECL);
5057 /* Parameters are handled by store_parm_decls, not cp_finish_decl. */
5058 gcc_assert (TREE_CODE (decl) != PARM_DECL);
5060 type = TREE_TYPE (decl);
5061 if (type == error_mark_node)
5064 /* Assume no cleanup is required. */
5065 cleanup = NULL_TREE;
5066 saved_processing_template_decl = processing_template_decl;
5068 /* If a name was specified, get the string. */
5069 if (global_scope_p (current_binding_level))
5070 asmspec_tree = maybe_apply_renaming_pragma (decl, asmspec_tree);
5071 if (asmspec_tree && asmspec_tree != error_mark_node)
5072 asmspec = TREE_STRING_POINTER (asmspec_tree);
5074 if (current_class_type
5075 && CP_DECL_CONTEXT (decl) == current_class_type
5076 && TYPE_BEING_DEFINED (current_class_type)
5077 && (DECL_INITIAL (decl) || init))
5078 DECL_INITIALIZED_IN_CLASS_P (decl) = 1;
5080 if (processing_template_decl)
5082 bool type_dependent_p;
5084 /* Add this declaration to the statement-tree. */
5085 if (at_function_scope_p ())
5086 add_decl_expr (decl);
5088 type_dependent_p = dependent_type_p (type);
5090 if (init && init_const_expr_p)
5092 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (decl) = 1;
5093 if (DECL_INTEGRAL_CONSTANT_VAR_P (decl))
5094 TREE_CONSTANT (decl) = 1;
5098 || !DECL_CLASS_SCOPE_P (decl)
5099 || !DECL_INTEGRAL_CONSTANT_VAR_P (decl)
5101 || value_dependent_expression_p (init))
5104 DECL_INITIAL (decl) = init;
5105 if (TREE_CODE (decl) == VAR_DECL
5106 && !DECL_PRETTY_FUNCTION_P (decl)
5107 && !type_dependent_p)
5108 maybe_deduce_size_from_array_init (decl, init);
5112 init = fold_non_dependent_expr (init);
5113 processing_template_decl = 0;
5116 /* Take care of TYPE_DECLs up front. */
5117 if (TREE_CODE (decl) == TYPE_DECL)
5119 if (type != error_mark_node
5120 && IS_AGGR_TYPE (type) && DECL_NAME (decl))
5122 if (TREE_TYPE (DECL_NAME (decl)) && TREE_TYPE (decl) != type)
5123 warning (0, "shadowing previous type declaration of %q#D", decl);
5124 set_identifier_type_value (DECL_NAME (decl), decl);
5127 /* If we have installed this as the canonical typedef for this
5128 type, and that type has not been defined yet, delay emitting
5129 the debug information for it, as we will emit it later. */
5130 if (TYPE_MAIN_DECL (TREE_TYPE (decl)) == decl
5131 && !COMPLETE_TYPE_P (TREE_TYPE (decl)))
5132 TYPE_DECL_SUPPRESS_DEBUG (decl) = 1;
5134 rest_of_decl_compilation (decl, DECL_CONTEXT (decl) == NULL_TREE,
5139 /* A reference will be modified here, as it is initialized. */
5140 if (! DECL_EXTERNAL (decl)
5141 && TREE_READONLY (decl)
5142 && TREE_CODE (type) == REFERENCE_TYPE)
5145 TREE_READONLY (decl) = 0;
5148 if (TREE_CODE (decl) == VAR_DECL)
5150 /* Only PODs can have thread-local storage. Other types may require
5151 various kinds of non-trivial initialization. */
5152 if (DECL_THREAD_LOCAL_P (decl) && !pod_type_p (TREE_TYPE (decl)))
5153 error ("%qD cannot be thread-local because it has non-POD type %qT",
5154 decl, TREE_TYPE (decl));
5155 /* If this is a local variable that will need a mangled name,
5156 register it now. We must do this before processing the
5157 initializer for the variable, since the initialization might
5158 require a guard variable, and since the mangled name of the
5159 guard variable will depend on the mangled name of this
5161 if (!processing_template_decl
5162 && DECL_FUNCTION_SCOPE_P (decl)
5163 && TREE_STATIC (decl)
5164 && !DECL_ARTIFICIAL (decl))
5165 push_local_name (decl);
5166 /* Convert the initializer to the type of DECL, if we have not
5167 already initialized DECL. */
5168 if (!DECL_INITIALIZED_P (decl)
5169 /* If !DECL_EXTERNAL then DECL is being defined. In the
5170 case of a static data member initialized inside the
5171 class-specifier, there can be an initializer even if DECL
5172 is *not* defined. */
5173 && (!DECL_EXTERNAL (decl) || init))
5177 DECL_NONTRIVIALLY_INITIALIZED_P (decl) = 1;
5178 if (init_const_expr_p)
5180 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (decl) = 1;
5181 if (DECL_INTEGRAL_CONSTANT_VAR_P (decl))
5182 TREE_CONSTANT (decl) = 1;
5185 init = check_initializer (decl, init, flags, &cleanup);
5186 /* Thread-local storage cannot be dynamically initialized. */
5187 if (DECL_THREAD_LOCAL_P (decl) && init)
5189 error ("%qD is thread-local and so cannot be dynamically "
5190 "initialized", decl);
5194 /* Check that the initializer for a static data member was a
5195 constant. Although we check in the parser that the
5196 initializer is an integral constant expression, we do not
5197 simplify division-by-zero at the point at which it
5198 occurs. Therefore, in:
5200 struct S { static const int i = 7 / 0; };
5202 we issue an error at this point. It would
5203 probably be better to forbid division by zero in
5204 integral constant expressions. */
5205 if (DECL_EXTERNAL (decl) && init)
5207 error ("%qD cannot be initialized by a non-constant expression"
5208 " when being declared", decl);
5209 DECL_INITIALIZED_IN_CLASS_P (decl) = 0;
5217 The memory occupied by any object of static storage
5218 duration is zero-initialized at program startup before
5219 any other initialization takes place.
5221 We cannot create an appropriate initializer until after
5222 the type of DECL is finalized. If DECL_INITIAL is set,
5223 then the DECL is statically initialized, and any
5224 necessary zero-initialization has already been performed. */
5225 if (TREE_STATIC (decl) && !DECL_INITIAL (decl))
5226 DECL_INITIAL (decl) = build_zero_init (TREE_TYPE (decl),
5227 /*nelts=*/NULL_TREE,
5228 /*static_storage_p=*/true);
5229 /* Remember that the initialization for this variable has
5231 DECL_INITIALIZED_P (decl) = 1;
5232 /* This declaration is the definition of this variable,
5233 unless we are initializing a static data member within
5234 the class specifier. */
5235 if (!DECL_EXTERNAL (decl))
5236 var_definition_p = true;
5238 /* If the variable has an array type, lay out the type, even if
5239 there is no initializer. It is valid to index through the
5240 array, and we must get TYPE_ALIGN set correctly on the array
5242 else if (TREE_CODE (type) == ARRAY_TYPE)
5246 /* Add this declaration to the statement-tree. This needs to happen
5247 after the call to check_initializer so that the DECL_EXPR for a
5248 reference temp is added before the DECL_EXPR for the reference itself. */
5249 if (at_function_scope_p ())
5250 add_decl_expr (decl);
5252 /* Let the middle end know about variables and functions -- but not
5253 static data members in uninstantiated class templates. */
5254 if (!saved_processing_template_decl
5255 && (TREE_CODE (decl) == VAR_DECL
5256 || TREE_CODE (decl) == FUNCTION_DECL))
5258 if (TREE_CODE (decl) == VAR_DECL)
5260 layout_var_decl (decl);
5261 maybe_commonize_var (decl);
5262 if (DECL_NAMESPACE_SCOPE_P (decl) && !TREE_PUBLIC (decl)
5263 && !DECL_THIS_STATIC (decl) && !DECL_ARTIFICIAL (decl))
5265 /* This is a const variable with implicit 'static'. Set
5266 DECL_THIS_STATIC so we can tell it from variables that are
5267 !TREE_PUBLIC because of the anonymous namespace. */
5268 DECL_THIS_STATIC (decl) = 1;
5272 make_rtl_for_nonlocal_decl (decl, init, asmspec);
5274 /* Check for abstractness of the type. Notice that there is no
5275 need to strip array types here since the check for those types
5276 is already done within create_array_type_for_decl. */
5277 if (TREE_CODE (type) == FUNCTION_TYPE
5278 || TREE_CODE (type) == METHOD_TYPE)
5279 abstract_virtuals_error (decl, TREE_TYPE (type));
5281 abstract_virtuals_error (decl, type);
5283 /* This needs to happen after the linkage is set. */
5284 determine_visibility (decl);
5286 if (TREE_CODE (decl) == FUNCTION_DECL
5287 || TREE_TYPE (decl) == error_mark_node)
5288 /* No initialization required. */
5290 else if (DECL_EXTERNAL (decl)
5291 && ! (DECL_LANG_SPECIFIC (decl)
5292 && DECL_NOT_REALLY_EXTERN (decl)))
5295 DECL_INITIAL (decl) = init;
5299 /* A variable definition. */
5300 if (DECL_FUNCTION_SCOPE_P (decl))
5302 /* Initialize the local variable. */
5303 if (processing_template_decl)
5304 DECL_INITIAL (decl) = init;
5305 else if (!TREE_STATIC (decl))
5306 initialize_local_var (decl, init);
5309 /* If a variable is defined, and then a subsequent
5310 definition with external linkage is encountered, we will
5311 get here twice for the same variable. We want to avoid
5312 calling expand_static_init more than once. For variables
5313 that are not static data members, we can call
5314 expand_static_init only when we actually process the
5315 initializer. It is not legal to redeclare a static data
5316 member, so this issue does not arise in that case. */
5317 if (var_definition_p && TREE_STATIC (decl))
5318 expand_static_init (decl, init);
5322 /* If a CLEANUP_STMT was created to destroy a temporary bound to a
5323 reference, insert it in the statement-tree now. */
5325 push_cleanup (decl, cleanup, false);
5328 processing_template_decl = saved_processing_template_decl;
5331 TREE_READONLY (decl) = 1;
5333 /* If this was marked 'used', be sure it will be output. */
5334 if (lookup_attribute ("used", DECL_ATTRIBUTES (decl)))
5335 mark_decl_referenced (decl);
5338 /* This is here for a midend callback from c-common.c. */
5341 finish_decl (tree decl, tree init, tree asmspec_tree)
5343 cp_finish_decl (decl, init, /*init_const_expr_p=*/false, asmspec_tree, 0);
5346 /* Returns a declaration for a VAR_DECL as if:
5348 extern "C" TYPE NAME;
5350 had been seen. Used to create compiler-generated global
5354 declare_global_var (tree name, tree type)
5358 push_to_top_level ();
5359 decl = build_decl (VAR_DECL, name, type);
5360 TREE_PUBLIC (decl) = 1;
5361 DECL_EXTERNAL (decl) = 1;
5362 DECL_ARTIFICIAL (decl) = 1;
5363 /* If the user has explicitly declared this variable (perhaps
5364 because the code we are compiling is part of a low-level runtime
5365 library), then it is possible that our declaration will be merged
5366 with theirs by pushdecl. */
5367 decl = pushdecl (decl);
5368 finish_decl (decl, NULL_TREE, NULL_TREE);
5369 pop_from_top_level ();
5374 /* Returns a pointer to the `atexit' function. Note that if
5375 FLAG_USE_CXA_ATEXIT is nonzero, then this will actually be the new
5376 `__cxa_atexit' function specified in the IA64 C++ ABI. */
5379 get_atexit_node (void)
5386 bool use_aeabi_atexit;
5391 if (flag_use_cxa_atexit)
5393 /* The declaration for `__cxa_atexit' is:
5395 int __cxa_atexit (void (*)(void *), void *, void *)
5397 We build up the argument types and then then function type
5400 use_aeabi_atexit = targetm.cxx.use_aeabi_atexit ();
5401 /* First, build the pointer-to-function type for the first
5403 arg_types = tree_cons (NULL_TREE, ptr_type_node, void_list_node);
5404 fn_type = build_function_type (void_type_node, arg_types);
5405 fn_ptr_type = build_pointer_type (fn_type);
5406 /* Then, build the rest of the argument types. */
5407 arg_types = tree_cons (NULL_TREE, ptr_type_node, void_list_node);
5408 if (use_aeabi_atexit)
5410 arg_types = tree_cons (NULL_TREE, fn_ptr_type, arg_types);
5411 arg_types = tree_cons (NULL_TREE, ptr_type_node, arg_types);
5415 arg_types = tree_cons (NULL_TREE, ptr_type_node, arg_types);
5416 arg_types = tree_cons (NULL_TREE, fn_ptr_type, arg_types);
5418 /* And the final __cxa_atexit type. */
5419 fn_type = build_function_type (integer_type_node, arg_types);
5420 fn_ptr_type = build_pointer_type (fn_type);
5421 if (use_aeabi_atexit)
5422 name = "__aeabi_atexit";
5424 name = "__cxa_atexit";
5428 /* The declaration for `atexit' is:
5430 int atexit (void (*)());
5432 We build up the argument types and then then function type
5434 fn_type = build_function_type (void_type_node, void_list_node);
5435 fn_ptr_type = build_pointer_type (fn_type);
5436 arg_types = tree_cons (NULL_TREE, fn_ptr_type, void_list_node);
5437 /* Build the final atexit type. */
5438 fn_type = build_function_type (integer_type_node, arg_types);
5442 /* Now, build the function declaration. */
5443 push_lang_context (lang_name_c);
5444 atexit_fndecl = build_library_fn_ptr (name, fn_type);
5445 mark_used (atexit_fndecl);
5446 pop_lang_context ();
5447 atexit_node = decay_conversion (atexit_fndecl);
5452 /* Returns the __dso_handle VAR_DECL. */
5455 get_dso_handle_node (void)
5457 if (dso_handle_node)
5458 return dso_handle_node;
5460 /* Declare the variable. */
5461 dso_handle_node = declare_global_var (get_identifier ("__dso_handle"),
5464 return dso_handle_node;
5467 /* Begin a new function with internal linkage whose job will be simply
5468 to destroy some particular variable. */
5470 static GTY(()) int start_cleanup_cnt;
5473 start_cleanup_fn (void)
5480 push_to_top_level ();
5482 /* No need to mangle this. */
5483 push_lang_context (lang_name_c);
5485 /* Build the parameter-types. */
5486 parmtypes = void_list_node;
5487 /* Functions passed to __cxa_atexit take an additional parameter.
5488 We'll just ignore it. After we implement the new calling
5489 convention for destructors, we can eliminate the use of
5490 additional cleanup functions entirely in the -fnew-abi case. */
5491 if (flag_use_cxa_atexit)
5492 parmtypes = tree_cons (NULL_TREE, ptr_type_node, parmtypes);
5493 /* Build the function type itself. */
5494 fntype = build_function_type (void_type_node, parmtypes);
5495 /* Build the name of the function. */
5496 sprintf (name, "__tcf_%d", start_cleanup_cnt++);
5497 /* Build the function declaration. */
5498 fndecl = build_lang_decl (FUNCTION_DECL, get_identifier (name), fntype);
5499 /* It's a function with internal linkage, generated by the
5501 TREE_PUBLIC (fndecl) = 0;
5502 DECL_ARTIFICIAL (fndecl) = 1;
5503 /* Make the function `inline' so that it is only emitted if it is
5504 actually needed. It is unlikely that it will be inlined, since
5505 it is only called via a function pointer, but we avoid unnecessary
5506 emissions this way. */
5507 DECL_INLINE (fndecl) = 1;
5508 DECL_DECLARED_INLINE_P (fndecl) = 1;
5509 DECL_INTERFACE_KNOWN (fndecl) = 1;
5510 /* Build the parameter. */
5511 if (flag_use_cxa_atexit)
5515 parmdecl = cp_build_parm_decl (NULL_TREE, ptr_type_node);
5516 DECL_CONTEXT (parmdecl) = fndecl;
5517 TREE_USED (parmdecl) = 1;
5518 DECL_ARGUMENTS (fndecl) = parmdecl;
5522 start_preparsed_function (fndecl, NULL_TREE, SF_PRE_PARSED);
5524 pop_lang_context ();
5526 return current_function_decl;
5529 /* Finish the cleanup function begun by start_cleanup_fn. */
5532 end_cleanup_fn (void)
5534 expand_or_defer_fn (finish_function (0));
5536 pop_from_top_level ();
5539 /* Generate code to handle the destruction of DECL, an object with
5540 static storage duration. */
5543 register_dtor_fn (tree decl)
5550 if (TYPE_HAS_TRIVIAL_DESTRUCTOR (TREE_TYPE (decl)))
5551 return void_zero_node;
5553 /* Call build_cleanup before we enter the anonymous function so that
5554 any access checks will be done relative to the current scope,
5555 rather than the scope of the anonymous function. */
5556 build_cleanup (decl);
5558 /* Now start the function. */
5559 cleanup = start_cleanup_fn ();
5561 /* Now, recompute the cleanup. It may contain SAVE_EXPRs that refer
5562 to the original function, rather than the anonymous one. That
5563 will make the back-end think that nested functions are in use,
5564 which causes confusion. */
5566 push_deferring_access_checks (dk_no_check);
5567 fcall = build_cleanup (decl);
5568 pop_deferring_access_checks ();
5570 /* Create the body of the anonymous function. */
5571 compound_stmt = begin_compound_stmt (BCS_FN_BODY);
5572 finish_expr_stmt (fcall);
5573 finish_compound_stmt (compound_stmt);
5576 /* Call atexit with the cleanup function. */
5577 cxx_mark_addressable (cleanup);
5578 mark_used (cleanup);
5579 cleanup = build_unary_op (ADDR_EXPR, cleanup, 0);
5580 if (flag_use_cxa_atexit)
5582 args = tree_cons (NULL_TREE,
5583 build_unary_op (ADDR_EXPR, get_dso_handle_node (), 0),
5585 if (targetm.cxx.use_aeabi_atexit ())
5587 args = tree_cons (NULL_TREE, cleanup, args);
5588 args = tree_cons (NULL_TREE, null_pointer_node, args);
5592 args = tree_cons (NULL_TREE, null_pointer_node, args);
5593 args = tree_cons (NULL_TREE, cleanup, args);
5597 args = tree_cons (NULL_TREE, cleanup, NULL_TREE);
5598 return build_function_call (get_atexit_node (), args);
5601 /* DECL is a VAR_DECL with static storage duration. INIT, if present,
5602 is its initializer. Generate code to handle the construction
5603 and destruction of DECL. */
5606 expand_static_init (tree decl, tree init)
5608 gcc_assert (TREE_CODE (decl) == VAR_DECL);
5609 gcc_assert (TREE_STATIC (decl));
5611 /* Some variables require no initialization. */
5613 && !TYPE_NEEDS_CONSTRUCTING (TREE_TYPE (decl))
5614 && TYPE_HAS_TRIVIAL_DESTRUCTOR (TREE_TYPE (decl)))
5617 if (DECL_FUNCTION_SCOPE_P (decl))
5619 /* Emit code to perform this initialization but once. */
5620 tree if_stmt = NULL_TREE, inner_if_stmt = NULL_TREE;
5621 tree then_clause = NULL_TREE, inner_then_clause = NULL_TREE;
5622 tree guard, guard_addr, guard_addr_list;
5623 tree acquire_fn, release_fn, abort_fn;
5626 /* Emit code to perform this initialization but once. This code
5629 static <type> guard;
5630 if (!guard.first_byte) {
5631 if (__cxa_guard_acquire (&guard)) {
5634 // Do initialization.
5635 flag = true; __cxa_guard_release (&guard);
5636 // Register variable for destruction at end of program.
5638 if (!flag) __cxa_guard_abort (&guard);
5642 Note that the `flag' variable is only set to 1 *after* the
5643 initialization is complete. This ensures that an exception,
5644 thrown during the construction, will cause the variable to
5645 reinitialized when we pass through this code again, as per:
5649 If the initialization exits by throwing an exception, the
5650 initialization is not complete, so it will be tried again
5651 the next time control enters the declaration.
5653 This process should be thread-safe, too; multiple threads
5654 should not be able to initialize the variable more than
5657 /* Create the guard variable. */
5658 guard = get_guard (decl);
5660 /* This optimization isn't safe on targets with relaxed memory
5661 consistency. On such targets we force synchronization in
5662 __cxa_guard_acquire. */
5663 if (!targetm.relaxed_ordering || !flag_threadsafe_statics)
5665 /* Begin the conditional initialization. */
5666 if_stmt = begin_if_stmt ();
5667 finish_if_stmt_cond (get_guard_cond (guard), if_stmt);
5668 then_clause = begin_compound_stmt (BCS_NO_SCOPE);
5671 if (flag_threadsafe_statics)
5673 guard_addr = build_address (guard);
5674 guard_addr_list = build_tree_list (NULL_TREE, guard_addr);
5676 acquire_fn = get_identifier ("__cxa_guard_acquire");
5677 release_fn = get_identifier ("__cxa_guard_release");
5678 abort_fn = get_identifier ("__cxa_guard_abort");
5679 if (!get_global_value_if_present (acquire_fn, &acquire_fn))
5681 tree argtypes = tree_cons (NULL_TREE, TREE_TYPE (guard_addr),
5683 tree vfntype = build_function_type (void_type_node, argtypes);
5684 acquire_fn = push_library_fn
5685 (acquire_fn, build_function_type (integer_type_node, argtypes));
5686 release_fn = push_library_fn (release_fn, vfntype);
5687 abort_fn = push_library_fn (abort_fn, vfntype);
5691 release_fn = identifier_global_value (release_fn);
5692 abort_fn = identifier_global_value (abort_fn);
5695 inner_if_stmt = begin_if_stmt ();
5696 finish_if_stmt_cond (build_call (acquire_fn, guard_addr_list),
5699 inner_then_clause = begin_compound_stmt (BCS_NO_SCOPE);
5700 begin = get_target_expr (boolean_false_node);
5701 flag = TARGET_EXPR_SLOT (begin);
5703 TARGET_EXPR_CLEANUP (begin)
5704 = build3 (COND_EXPR, void_type_node, flag,
5706 build_call (abort_fn, guard_addr_list));
5707 CLEANUP_EH_ONLY (begin) = 1;
5709 /* Do the initialization itself. */
5710 init = add_stmt_to_compound (begin, init);
5711 init = add_stmt_to_compound
5712 (init, build2 (MODIFY_EXPR, void_type_node, flag, boolean_true_node));
5713 init = add_stmt_to_compound
5714 (init, build_call (release_fn, guard_addr_list));
5717 init = add_stmt_to_compound (init, set_guard (guard));
5719 /* Use atexit to register a function for destroying this static
5721 init = add_stmt_to_compound (init, register_dtor_fn (decl));
5723 finish_expr_stmt (init);
5725 if (flag_threadsafe_statics)
5727 finish_compound_stmt (inner_then_clause);
5728 finish_then_clause (inner_if_stmt);
5729 finish_if_stmt (inner_if_stmt);
5732 if (!targetm.relaxed_ordering || !flag_threadsafe_statics)
5734 finish_compound_stmt (then_clause);
5735 finish_then_clause (if_stmt);
5736 finish_if_stmt (if_stmt);
5740 static_aggregates = tree_cons (init, decl, static_aggregates);
5744 /* Make TYPE a complete type based on INITIAL_VALUE.
5745 Return 0 if successful, 1 if INITIAL_VALUE can't be deciphered,
5746 2 if there was no information (in which case assume 0 if DO_DEFAULT),
5747 3 if the initializer list is empty (in pedantic mode). */
5750 cp_complete_array_type (tree *ptype, tree initial_value, bool do_default)
5753 tree type, elt_type;
5757 /* An array of character type can be initialized from a
5758 brace-enclosed string constant.
5760 FIXME: this code is duplicated from reshape_init. Probably
5761 we should just call reshape_init here? */
5762 if (char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (*ptype)))
5763 && TREE_CODE (initial_value) == CONSTRUCTOR
5764 && !VEC_empty (constructor_elt, CONSTRUCTOR_ELTS (initial_value)))
5766 VEC(constructor_elt,gc) *v = CONSTRUCTOR_ELTS (initial_value);
5767 tree value = VEC_index (constructor_elt, v, 0)->value;
5769 if (TREE_CODE (value) == STRING_CST
5770 && VEC_length (constructor_elt, v) == 1)
5771 initial_value = value;
5775 failure = complete_array_type (ptype, initial_value, do_default);
5777 /* We can create the array before the element type is complete, which
5778 means that we didn't have these two bits set in the original type
5779 either. In completing the type, we are expected to propagate these
5780 bits. See also complete_type which does the same thing for arrays
5783 if (TYPE_DOMAIN (type))
5785 elt_type = TREE_TYPE (type);
5786 TYPE_NEEDS_CONSTRUCTING (type) = TYPE_NEEDS_CONSTRUCTING (elt_type);
5787 TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type)
5788 = TYPE_HAS_NONTRIVIAL_DESTRUCTOR (elt_type);
5794 /* Return zero if something is declared to be a member of type
5795 CTYPE when in the context of CUR_TYPE. STRING is the error
5796 message to print in that case. Otherwise, quietly return 1. */
5799 member_function_or_else (tree ctype, tree cur_type, enum overload_flags flags)
5801 if (ctype && ctype != cur_type)
5803 if (flags == DTOR_FLAG)
5804 error ("destructor for alien class %qT cannot be a member", ctype);
5806 error ("constructor for alien class %qT cannot be a member", ctype);
5812 /* Subroutine of `grokdeclarator'. */
5814 /* Generate errors possibly applicable for a given set of specifiers.
5815 This is for ARM $7.1.2. */
5818 bad_specifiers (tree object,
5827 error ("%qD declared as a %<virtual%> %s", object, type);
5829 error ("%qD declared as an %<inline%> %s", object, type);
5831 error ("%<const%> and %<volatile%> function specifiers on "
5832 "%qD invalid in %s declaration",
5835 error ("%q+D declared as a friend", object);
5837 && (TREE_CODE (object) == TYPE_DECL
5838 || (!TYPE_PTRFN_P (TREE_TYPE (object))
5839 && !TYPE_REFFN_P (TREE_TYPE (object))
5840 && !TYPE_PTRMEMFUNC_P (TREE_TYPE (object)))))
5841 error ("%q+D declared with an exception specification", object);
5844 /* DECL is a member function or static data member and is presently
5845 being defined. Check that the definition is taking place in a
5849 check_class_member_definition_namespace (tree decl)
5851 /* These checks only apply to member functions and static data
5853 gcc_assert (TREE_CODE (decl) == FUNCTION_DECL
5854 || TREE_CODE (decl) == VAR_DECL);
5855 /* We check for problems with specializations in pt.c in
5856 check_specialization_namespace, where we can issue better
5858 if (processing_specialization)
5860 /* There are no restrictions on the placement of
5861 explicit instantiations. */
5862 if (processing_explicit_instantiation)
5866 A member function definition that appears outside of the
5867 class definition shall appear in a namespace scope enclosing
5868 the class definition.
5872 The definition for a static data member shall appear in a
5873 namespace scope enclosing the member's class definition. */
5874 if (!is_ancestor (current_namespace, DECL_CONTEXT (decl)))
5875 pedwarn ("definition of %qD is not in namespace enclosing %qT",
5876 decl, DECL_CONTEXT (decl));
5879 /* Build a PARM_DECL for the "this" parameter. TYPE is the
5880 METHOD_TYPE for a non-static member function; QUALS are the
5881 cv-qualifiers that apply to the function. */
5884 build_this_parm (tree type, cp_cv_quals quals)
5889 cp_cv_quals this_quals;
5891 this_type = TREE_VALUE (TYPE_ARG_TYPES (type));
5892 /* The `this' parameter is implicitly `const'; it cannot be
5894 this_quals = (quals & TYPE_QUAL_RESTRICT) | TYPE_QUAL_CONST;
5895 qual_type = cp_build_qualified_type (this_type, this_quals);
5896 parm = build_artificial_parm (this_identifier, qual_type);
5897 cp_apply_type_quals_to_decl (this_quals, parm);
5901 /* CTYPE is class type, or null if non-class.
5902 TYPE is type this FUNCTION_DECL should have, either FUNCTION_TYPE
5904 DECLARATOR is the function's name.
5905 PARMS is a chain of PARM_DECLs for the function.
5906 VIRTUALP is truthvalue of whether the function is virtual or not.
5907 FLAGS are to be passed through to `grokclassfn'.
5908 QUALS are qualifiers indicating whether the function is `const'
5910 RAISES is a list of exceptions that this function can raise.
5911 CHECK is 1 if we must find this method in CTYPE, 0 if we should
5912 not look, and -1 if we should not call `grokclassfn' at all.
5914 SFK is the kind of special function (if any) for the new function.
5916 Returns `NULL_TREE' if something goes wrong, after issuing
5917 applicable error messages. */
5920 grokfndecl (tree ctype,
5924 tree orig_declarator,
5926 enum overload_flags flags,
5933 special_function_kind sfk,
5940 int staticp = ctype && TREE_CODE (type) == FUNCTION_TYPE;
5944 type = build_exception_variant (type, raises);
5946 decl = build_lang_decl (FUNCTION_DECL, declarator, type);
5947 if (TREE_CODE (type) == METHOD_TYPE)
5950 parm = build_this_parm (type, quals);
5951 TREE_CHAIN (parm) = parms;
5954 DECL_ARGUMENTS (decl) = parms;
5955 /* Propagate volatile out from type to decl. */
5956 if (TYPE_VOLATILE (type))
5957 TREE_THIS_VOLATILE (decl) = 1;
5960 && TREE_CODE (orig_declarator) == TEMPLATE_ID_EXPR)
5964 ("defining explicit specialization %qD in friend declaration",
5968 tree fns = TREE_OPERAND (orig_declarator, 0);
5969 tree args = TREE_OPERAND (orig_declarator, 1);
5971 if (PROCESSING_REAL_TEMPLATE_DECL_P ())
5973 /* Something like `template <class T> friend void f<T>()'. */
5974 error ("invalid use of template-id %qD in declaration "
5975 "of primary template",
5981 /* A friend declaration of the form friend void f<>(). Record
5982 the information in the TEMPLATE_ID_EXPR. */
5983 SET_DECL_IMPLICIT_INSTANTIATION (decl);
5985 if (TREE_CODE (fns) == COMPONENT_REF)
5987 /* Due to bison parser ickiness, we will have already looked
5988 up an operator_name or PFUNCNAME within the current class
5989 (see template_id in parse.y). If the current class contains
5990 such a name, we'll get a COMPONENT_REF here. Undo that. */
5992 gcc_assert (TREE_TYPE (TREE_OPERAND (fns, 0))
5993 == current_class_type);
5994 fns = TREE_OPERAND (fns, 1);
5996 gcc_assert (TREE_CODE (fns) == IDENTIFIER_NODE
5997 || TREE_CODE (fns) == OVERLOAD);
5998 DECL_TEMPLATE_INFO (decl) = tree_cons (fns, args, NULL_TREE);
6000 for (t = TYPE_ARG_TYPES (TREE_TYPE (decl)); t; t = TREE_CHAIN (t))
6001 if (TREE_PURPOSE (t)
6002 && TREE_CODE (TREE_PURPOSE (t)) == DEFAULT_ARG)
6004 error ("default arguments are not allowed in declaration "
6005 "of friend template specialization %qD",
6012 error ("%<inline%> is not allowed in declaration of friend "
6013 "template specialization %qD",
6020 /* If this decl has namespace scope, set that up. */
6022 set_decl_namespace (decl, in_namespace, friendp);
6024 DECL_CONTEXT (decl) = FROB_CONTEXT (current_namespace);
6026 /* `main' and builtins have implicit 'C' linkage. */
6027 if ((MAIN_NAME_P (declarator)
6028 || (IDENTIFIER_LENGTH (declarator) > 10
6029 && IDENTIFIER_POINTER (declarator)[0] == '_'
6030 && IDENTIFIER_POINTER (declarator)[1] == '_'
6031 && strncmp (IDENTIFIER_POINTER (declarator)+2, "builtin_", 8) == 0))
6032 && current_lang_name == lang_name_cplusplus
6033 && ctype == NULL_TREE
6034 /* NULL_TREE means global namespace. */
6035 && DECL_CONTEXT (decl) == NULL_TREE)
6036 SET_DECL_LANGUAGE (decl, lang_c);
6038 /* Should probably propagate const out from type to decl I bet (mrs). */
6041 DECL_STATIC_FUNCTION_P (decl) = 1;
6042 DECL_CONTEXT (decl) = ctype;
6047 DECL_CONTEXT (decl) = ctype;
6049 check_class_member_definition_namespace (decl);
6052 if (ctype == NULL_TREE && DECL_MAIN_P (decl))
6054 if (processing_template_decl)
6055 error ("cannot declare %<::main%> to be a template");
6057 error ("cannot declare %<::main%> to be inline");
6059 error ("cannot declare %<::main%> to be static");
6060 if (!same_type_p (TREE_TYPE (TREE_TYPE (decl)),
6063 tree oldtypeargs = TYPE_ARG_TYPES (TREE_TYPE (decl));
6065 error ("%<::main%> must return %<int%>");
6066 newtype = build_function_type (integer_type_node,
6068 TREE_TYPE (decl) = newtype;
6074 /* Members of anonymous types and local classes have no linkage; make
6075 them internal. If a typedef is made later, this will be changed. */
6076 if (ctype && (TYPE_ANONYMOUS_P (ctype)
6077 || decl_function_context (TYPE_MAIN_DECL (ctype))))
6082 /* [basic.link]: A name with no linkage (notably, the name of a class
6083 or enumeration declared in a local scope) shall not be used to
6084 declare an entity with linkage.
6086 Only check this for public decls for now. See core 319, 389. */
6087 t = no_linkage_check (TREE_TYPE (decl),
6088 /*relaxed_p=*/false);
6091 if (TYPE_ANONYMOUS_P (t))
6093 if (DECL_EXTERN_C_P (decl))
6094 /* Allow this; it's pretty common in C. */;
6097 pedwarn ("non-local function %q#D uses anonymous type",
6099 if (DECL_ORIGINAL_TYPE (TYPE_NAME (t)))
6100 pedwarn ("%q+#D does not refer to the unqualified "
6101 "type, so it is not used for linkage",
6106 pedwarn ("non-local function %q#D uses local type %qT", decl, t);
6110 TREE_PUBLIC (decl) = publicp;
6113 DECL_INTERFACE_KNOWN (decl) = 1;
6114 DECL_NOT_REALLY_EXTERN (decl) = 1;
6117 /* If the declaration was declared inline, mark it as such. */
6119 DECL_DECLARED_INLINE_P (decl) = 1;
6120 /* We inline functions that are explicitly declared inline, or, when
6121 the user explicitly asks us to, all functions. */
6122 if (DECL_DECLARED_INLINE_P (decl)
6123 || (flag_inline_trees == 2 && !DECL_INLINE (decl) && funcdef_flag))
6124 DECL_INLINE (decl) = 1;
6126 DECL_EXTERNAL (decl) = 1;
6127 if (quals && TREE_CODE (type) == FUNCTION_TYPE)
6129 error ("%smember function %qD cannot have cv-qualifier",
6130 (ctype ? "static " : "non-"), decl);
6131 quals = TYPE_UNQUALIFIED;
6134 if (IDENTIFIER_OPNAME_P (DECL_NAME (decl))
6135 && !grok_op_properties (decl, /*complain=*/true))
6138 if (ctype && decl_function_context (decl))
6139 DECL_NO_STATIC_CHAIN (decl) = 1;
6142 /* Make the init_value nonzero so pushdecl knows this is not
6143 tentative. error_mark_node is replaced later with the BLOCK. */
6144 DECL_INITIAL (decl) = error_mark_node;
6146 if (TYPE_NOTHROW_P (type) || nothrow_libfn_p (decl))
6147 TREE_NOTHROW (decl) = 1;
6149 /* Caller will do the rest of this. */
6153 if (ctype != NULL_TREE)
6155 if (sfk == sfk_constructor)
6156 DECL_CONSTRUCTOR_P (decl) = 1;
6158 grokclassfn (ctype, decl, flags);
6161 decl = check_explicit_specialization (orig_declarator, decl,
6164 4 * (friendp != 0));
6165 if (decl == error_mark_node)
6170 cplus_decl_attributes (&decl, *attrlist, 0);
6171 *attrlist = NULL_TREE;
6174 if (ctype != NULL_TREE
6175 && (! TYPE_FOR_JAVA (ctype) || check_java_method (decl))
6180 old_decl = check_classfn (ctype, decl,
6181 (processing_template_decl
6182 > template_class_depth (ctype))
6183 ? current_template_parms
6190 if (TREE_CODE (old_decl) == TEMPLATE_DECL)
6191 /* Because grokfndecl is always supposed to return a
6192 FUNCTION_DECL, we pull out the DECL_TEMPLATE_RESULT
6193 here. We depend on our callers to figure out that its
6194 really a template that's being returned. */
6195 old_decl = DECL_TEMPLATE_RESULT (old_decl);
6197 if (DECL_STATIC_FUNCTION_P (old_decl)
6198 && TREE_CODE (TREE_TYPE (decl)) == METHOD_TYPE)
6199 /* Remove the `this' parm added by grokclassfn.
6200 XXX Isn't this done in start_function, too? */
6201 revert_static_member_fn (decl);
6202 if (DECL_ARTIFICIAL (old_decl))
6203 error ("definition of implicitly-declared %qD", old_decl);
6205 /* Since we've smashed OLD_DECL to its
6206 DECL_TEMPLATE_RESULT, we must do the same to DECL. */
6207 if (TREE_CODE (decl) == TEMPLATE_DECL)
6208 decl = DECL_TEMPLATE_RESULT (decl);
6210 /* Attempt to merge the declarations. This can fail, in
6211 the case of some invalid specialization declarations. */
6212 pushed_scope = push_scope (ctype);
6213 ok = duplicate_decls (decl, old_decl, friendp);
6215 pop_scope (pushed_scope);
6218 error ("no %q#D member function declared in class %qT",
6226 if (DECL_CONSTRUCTOR_P (decl) && !grok_ctor_properties (ctype, decl))
6229 if (ctype == NULL_TREE || check)
6233 DECL_VIRTUAL_P (decl) = 1;
6238 /* DECL is a VAR_DECL for a static data member. Set flags to reflect
6239 the linkage that DECL will receive in the object file. */
6242 set_linkage_for_static_data_member (tree decl)
6244 /* A static data member always has static storage duration and
6245 external linkage. Note that static data members are forbidden in
6246 local classes -- the only situation in which a class has
6247 non-external linkage. */
6248 TREE_PUBLIC (decl) = 1;
6249 TREE_STATIC (decl) = 1;
6250 /* For non-template classes, static data members are always put
6251 out in exactly those files where they are defined, just as
6252 with ordinary namespace-scope variables. */
6253 if (!processing_template_decl)
6254 DECL_INTERFACE_KNOWN (decl) = 1;
6257 /* Create a VAR_DECL named NAME with the indicated TYPE.
6259 If SCOPE is non-NULL, it is the class type or namespace containing
6260 the variable. If SCOPE is NULL, the variable should is created in
6261 the innermost enclosings scope. */
6264 grokvardecl (tree type,
6266 const cp_decl_specifier_seq *declspecs,
6272 tree explicit_scope;
6274 gcc_assert (!name || TREE_CODE (name) == IDENTIFIER_NODE);
6276 /* Compute the scope in which to place the variable, but remember
6277 whether or not that scope was explicitly specified by the user. */
6278 explicit_scope = scope;
6281 /* An explicit "extern" specifier indicates a namespace-scope
6283 if (declspecs->storage_class == sc_extern)
6284 scope = current_namespace;
6285 else if (!at_function_scope_p ())
6286 scope = current_scope ();
6290 && (/* If the variable is a namespace-scope variable declared in a
6291 template, we need DECL_LANG_SPECIFIC. */
6292 (TREE_CODE (scope) == NAMESPACE_DECL && processing_template_decl)
6293 /* Similarly for namespace-scope variables with language linkage
6295 || (TREE_CODE (scope) == NAMESPACE_DECL
6296 && current_lang_name != lang_name_cplusplus)
6297 /* Similarly for static data members. */
6299 decl = build_lang_decl (VAR_DECL, name, type);
6301 decl = build_decl (VAR_DECL, name, type);
6303 if (explicit_scope && TREE_CODE (explicit_scope) == NAMESPACE_DECL)
6304 set_decl_namespace (decl, explicit_scope, 0);
6306 DECL_CONTEXT (decl) = FROB_CONTEXT (scope);
6308 if (declspecs->storage_class == sc_extern)
6310 DECL_THIS_EXTERN (decl) = 1;
6311 DECL_EXTERNAL (decl) = !initialized;
6314 if (DECL_CLASS_SCOPE_P (decl))
6316 set_linkage_for_static_data_member (decl);
6317 /* This function is only called with out-of-class definitions. */
6318 DECL_EXTERNAL (decl) = 0;
6319 check_class_member_definition_namespace (decl);
6321 /* At top level, either `static' or no s.c. makes a definition
6322 (perhaps tentative), and absence of `static' makes it public. */
6323 else if (toplevel_bindings_p ())
6325 TREE_PUBLIC (decl) = (declspecs->storage_class != sc_static
6326 && (DECL_THIS_EXTERN (decl) || ! constp));
6327 TREE_STATIC (decl) = ! DECL_EXTERNAL (decl);
6329 /* Not at top level, only `static' makes a static definition. */
6332 TREE_STATIC (decl) = declspecs->storage_class == sc_static;
6333 TREE_PUBLIC (decl) = DECL_EXTERNAL (decl);
6336 if (declspecs->specs[(int)ds_thread])
6338 if (targetm.have_tls)
6339 DECL_TLS_MODEL (decl) = decl_default_tls_model (decl);
6341 /* A mere warning is sure to result in improper semantics
6342 at runtime. Don't bother to allow this to compile. */
6343 error ("thread-local storage not supported for this target");
6346 if (TREE_PUBLIC (decl))
6348 /* [basic.link]: A name with no linkage (notably, the name of a class
6349 or enumeration declared in a local scope) shall not be used to
6350 declare an entity with linkage.
6352 Only check this for public decls for now. */
6353 tree t = no_linkage_check (TREE_TYPE (decl), /*relaxed_p=*/false);
6356 if (TYPE_ANONYMOUS_P (t))
6358 if (DECL_EXTERN_C_P (decl))
6359 /* Allow this; it's pretty common in C. */
6363 /* DRs 132, 319 and 389 seem to indicate types with
6364 no linkage can only be used to declare extern "C"
6365 entities. Since it's not always an error in the
6366 ISO C++ 90 Standard, we only issue a warning. */
6367 warning (0, "non-local variable %q#D uses anonymous type",
6369 if (DECL_ORIGINAL_TYPE (TYPE_NAME (t)))
6370 warning (0, "%q+#D does not refer to the unqualified "
6371 "type, so it is not used for linkage",
6376 warning (0, "non-local variable %q#D uses local type %qT", decl, t);
6380 DECL_INTERFACE_KNOWN (decl) = 1;
6385 /* Create and return a canonical pointer to member function type, for
6386 TYPE, which is a POINTER_TYPE to a METHOD_TYPE. */
6389 build_ptrmemfunc_type (tree type)
6393 tree unqualified_variant = NULL_TREE;
6395 if (type == error_mark_node)
6398 /* If a canonical type already exists for this type, use it. We use
6399 this method instead of type_hash_canon, because it only does a
6400 simple equality check on the list of field members. */
6402 if ((t = TYPE_GET_PTRMEMFUNC_TYPE (type)))
6405 /* Make sure that we always have the unqualified pointer-to-member
6407 if (cp_type_quals (type) != TYPE_UNQUALIFIED)
6409 = build_ptrmemfunc_type (TYPE_MAIN_VARIANT (type));
6411 t = make_aggr_type (RECORD_TYPE);
6412 xref_basetypes (t, NULL_TREE);
6414 /* Let the front-end know this is a pointer to member function... */
6415 TYPE_PTRMEMFUNC_FLAG (t) = 1;
6416 /* ... and not really an aggregate. */
6417 SET_IS_AGGR_TYPE (t, 0);
6419 field = build_decl (FIELD_DECL, pfn_identifier, type);
6422 field = build_decl (FIELD_DECL, delta_identifier, delta_type_node);
6423 TREE_CHAIN (field) = fields;
6426 finish_builtin_struct (t, "__ptrmemfunc_type", fields, ptr_type_node);
6428 /* Zap out the name so that the back-end will give us the debugging
6429 information for this anonymous RECORD_TYPE. */
6430 TYPE_NAME (t) = NULL_TREE;
6432 /* If this is not the unqualified form of this pointer-to-member
6433 type, set the TYPE_MAIN_VARIANT for this type to be the
6434 unqualified type. Since they are actually RECORD_TYPEs that are
6435 not variants of each other, we must do this manually. */
6436 if (cp_type_quals (type) != TYPE_UNQUALIFIED)
6438 t = build_qualified_type (t, cp_type_quals (type));
6439 TYPE_MAIN_VARIANT (t) = unqualified_variant;
6440 TYPE_NEXT_VARIANT (t) = TYPE_NEXT_VARIANT (unqualified_variant);
6441 TYPE_NEXT_VARIANT (unqualified_variant) = t;
6444 /* Cache this pointer-to-member type so that we can find it again
6446 TYPE_SET_PTRMEMFUNC_TYPE (type, t);
6451 /* Create and return a pointer to data member type. */
6454 build_ptrmem_type (tree class_type, tree member_type)
6456 if (TREE_CODE (member_type) == METHOD_TYPE)
6460 arg_types = TYPE_ARG_TYPES (member_type);
6461 class_type = (cp_build_qualified_type
6463 cp_type_quals (TREE_TYPE (TREE_VALUE (arg_types)))));
6465 = build_method_type_directly (class_type,
6466 TREE_TYPE (member_type),
6467 TREE_CHAIN (arg_types));
6468 return build_ptrmemfunc_type (build_pointer_type (member_type));
6472 gcc_assert (TREE_CODE (member_type) != FUNCTION_TYPE);
6473 return build_offset_type (class_type, member_type);
6477 /* DECL is a VAR_DECL defined in-class, whose TYPE is also given.
6478 Check to see that the definition is valid. Issue appropriate error
6479 messages. Return 1 if the definition is particularly bad, or 0
6483 check_static_variable_definition (tree decl, tree type)
6485 /* Motion 10 at San Diego: If a static const integral data member is
6486 initialized with an integral constant expression, the initializer
6487 may appear either in the declaration (within the class), or in
6488 the definition, but not both. If it appears in the class, the
6489 member is a member constant. The file-scope definition is always
6491 if (!ARITHMETIC_TYPE_P (type) && TREE_CODE (type) != ENUMERAL_TYPE)
6493 error ("invalid in-class initialization of static data member "
6494 "of non-integral type %qT",
6496 /* If we just return the declaration, crashes will sometimes
6497 occur. We therefore return void_type_node, as if this were a
6498 friend declaration, to cause callers to completely ignore
6499 this declaration. */
6502 else if (!CP_TYPE_CONST_P (type))
6503 error ("ISO C++ forbids in-class initialization of non-const "
6504 "static member %qD",
6506 else if (pedantic && !INTEGRAL_TYPE_P (type))
6507 pedwarn ("ISO C++ forbids initialization of member constant "
6508 "%qD of non-integral type %qT", decl, type);
6513 /* Given the SIZE (i.e., number of elements) in an array, compute an
6514 appropriate index type for the array. If non-NULL, NAME is the
6515 name of the thing being declared. */
6518 compute_array_index_type (tree name, tree size)
6523 if (error_operand_p (size))
6524 return error_mark_node;
6526 type = TREE_TYPE (size);
6527 /* The array bound must be an integer type. */
6528 if (!dependent_type_p (type) && !INTEGRAL_TYPE_P (type))
6531 error ("size of array %qD has non-integral type %qT", name, type);
6533 error ("size of array has non-integral type %qT", type);
6534 size = integer_one_node;
6535 type = TREE_TYPE (size);
6538 if (abi_version_at_least (2)
6539 /* We should only handle value dependent expressions specially. */
6540 ? value_dependent_expression_p (size)
6541 /* But for abi-1, we handled all instances in templates. This
6542 effects the manglings produced. */
6543 : processing_template_decl)
6544 return build_index_type (build_min (MINUS_EXPR, sizetype,
6545 size, integer_one_node));
6547 /* The size might be the result of a cast. */
6548 STRIP_TYPE_NOPS (size);
6550 /* It might be a const variable or enumeration constant. */
6551 size = integral_constant_value (size);
6553 /* Normally, the array-bound will be a constant. */
6554 if (TREE_CODE (size) == INTEGER_CST)
6556 /* Check to see if the array bound overflowed. Make that an
6557 error, no matter how generous we're being. */
6558 int old_flag_pedantic_errors = flag_pedantic_errors;
6559 int old_pedantic = pedantic;
6560 pedantic = flag_pedantic_errors = 1;
6561 constant_expression_warning (size);
6562 pedantic = old_pedantic;
6563 flag_pedantic_errors = old_flag_pedantic_errors;
6565 /* An array must have a positive number of elements. */
6566 if (INT_CST_LT (size, integer_zero_node))
6569 error ("size of array %qD is negative", name);
6571 error ("size of array is negative");
6572 size = integer_one_node;
6574 /* As an extension we allow zero-sized arrays. We always allow
6575 them in system headers because glibc uses them. */
6576 else if (integer_zerop (size) && pedantic && !in_system_header)
6579 pedwarn ("ISO C++ forbids zero-size array %qD", name);
6581 pedwarn ("ISO C++ forbids zero-size array");
6584 else if (TREE_CONSTANT (size))
6586 /* `(int) &fn' is not a valid array bound. */
6588 error ("size of array %qD is not an integral constant-expression",
6591 error ("size of array is not an integral constant-expression");
6592 size = integer_one_node;
6597 pedwarn ("ISO C++ forbids variable-size array %qD", name);
6599 pedwarn ("ISO C++ forbids variable-size array");
6602 if (processing_template_decl && !TREE_CONSTANT (size))
6603 /* A variable sized array. */
6604 itype = build_min (MINUS_EXPR, sizetype, size, integer_one_node);
6607 HOST_WIDE_INT saved_processing_template_decl;
6609 /* Compute the index of the largest element in the array. It is
6610 one less than the number of elements in the array. We save
6611 and restore PROCESSING_TEMPLATE_DECL so that computations in
6612 cp_build_binary_op will be appropriately folded. */
6613 saved_processing_template_decl = processing_template_decl;
6614 processing_template_decl = 0;
6615 itype = cp_build_binary_op (MINUS_EXPR,
6616 cp_convert (ssizetype, size),
6617 cp_convert (ssizetype, integer_one_node));
6618 itype = fold (itype);
6619 processing_template_decl = saved_processing_template_decl;
6621 if (!TREE_CONSTANT (itype))
6622 /* A variable sized array. */
6623 itype = variable_size (itype);
6624 /* Make sure that there was no overflow when creating to a signed
6625 index type. (For example, on a 32-bit machine, an array with
6626 size 2^32 - 1 is too big.) */
6627 else if (TREE_CODE (itype) == INTEGER_CST
6628 && TREE_OVERFLOW (itype))
6630 error ("overflow in array dimension");
6631 TREE_OVERFLOW (itype) = 0;
6635 /* Create and return the appropriate index type. */
6636 return build_index_type (itype);
6639 /* Returns the scope (if any) in which the entity declared by
6640 DECLARATOR will be located. If the entity was declared with an
6641 unqualified name, NULL_TREE is returned. */
6644 get_scope_of_declarator (const cp_declarator *declarator)
6646 while (declarator && declarator->kind != cdk_id)
6647 declarator = declarator->declarator;
6649 /* If the declarator-id is a SCOPE_REF, the scope in which the
6650 declaration occurs is the first operand. */
6652 && declarator->u.id.qualifying_scope)
6653 return declarator->u.id.qualifying_scope;
6655 /* Otherwise, the declarator is not a qualified name; the entity will
6656 be declared in the current scope. */
6660 /* Returns an ARRAY_TYPE for an array with SIZE elements of the
6661 indicated TYPE. If non-NULL, NAME is the NAME of the declaration
6665 create_array_type_for_decl (tree name, tree type, tree size)
6667 tree itype = NULL_TREE;
6668 const char* error_msg;
6670 /* If things have already gone awry, bail now. */
6671 if (type == error_mark_node || size == error_mark_node)
6672 return error_mark_node;
6674 /* Assume that everything will go OK. */
6677 /* There are some types which cannot be array elements. */
6678 switch (TREE_CODE (type))
6681 error_msg = "array of void";
6685 error_msg = "array of functions";
6688 case REFERENCE_TYPE:
6689 error_msg = "array of references";
6693 error_msg = "array of function members";
6700 /* If something went wrong, issue an error-message and return. */
6704 error ("declaration of %qD as %s", name, error_msg);
6706 error ("creating %s", error_msg);
6708 return error_mark_node;
6713 The constant expressions that specify the bounds of the arrays
6714 can be omitted only for the first member of the sequence. */
6715 if (TREE_CODE (type) == ARRAY_TYPE && !TYPE_DOMAIN (type))
6718 error ("declaration of %qD as multidimensional array must "
6719 "have bounds for all dimensions except the first",
6722 error ("multidimensional array must have bounds for all "
6723 "dimensions except the first");
6725 return error_mark_node;
6728 /* Figure out the index type for the array. */
6730 itype = compute_array_index_type (name, size);
6733 T is called the array element type; this type shall not be [...] an
6734 abstract class type. */
6735 abstract_virtuals_error (name, type);
6737 return build_cplus_array_type (type, itype);
6740 /* Check that it's OK to declare a function with the indicated TYPE.
6741 SFK indicates the kind of special function (if any) that this
6742 function is. OPTYPE is the type given in a conversion operator
6743 declaration, or the class type for a constructor/destructor.
6744 Returns the actual return type of the function; that
6745 may be different than TYPE if an error occurs, or for certain
6746 special functions. */
6749 check_special_function_return_type (special_function_kind sfk,
6755 case sfk_constructor:
6757 error ("return type specification for constructor invalid");
6759 if (targetm.cxx.cdtor_returns_this () && !TYPE_FOR_JAVA (optype))
6760 type = build_pointer_type (optype);
6762 type = void_type_node;
6765 case sfk_destructor:
6767 error ("return type specification for destructor invalid");
6768 /* We can't use the proper return type here because we run into
6769 problems with ambiguous bases and covariant returns.
6770 Java classes are left unchanged because (void *) isn't a valid
6771 Java type, and we don't want to change the Java ABI. */
6772 if (targetm.cxx.cdtor_returns_this () && !TYPE_FOR_JAVA (optype))
6773 type = build_pointer_type (void_type_node);
6775 type = void_type_node;
6778 case sfk_conversion:
6779 if (type && !same_type_p (type, optype))
6780 error ("operator %qT declared to return %qT", optype, type);
6782 pedwarn ("return type specified for %<operator %T%>", optype);
6793 /* A variable or data member (whose unqualified name is IDENTIFIER)
6794 has been declared with the indicated TYPE. If the TYPE is not
6795 acceptable, issue an error message and return a type to use for
6796 error-recovery purposes. */
6799 check_var_type (tree identifier, tree type)
6801 if (VOID_TYPE_P (type))
6804 error ("unnamed variable or field declared void");
6805 else if (TREE_CODE (identifier) == IDENTIFIER_NODE)
6807 gcc_assert (!IDENTIFIER_OPNAME_P (identifier));
6808 error ("variable or field %qE declared void", identifier);
6811 error ("variable or field declared void");
6812 type = error_mark_node;
6818 /* Given declspecs and a declarator (abstract or otherwise), determine
6819 the name and type of the object declared and construct a DECL node
6822 DECLSPECS is a chain of tree_list nodes whose value fields
6823 are the storage classes and type specifiers.
6825 DECL_CONTEXT says which syntactic context this declaration is in:
6826 NORMAL for most contexts. Make a VAR_DECL or FUNCTION_DECL or TYPE_DECL.
6827 FUNCDEF for a function definition. Like NORMAL but a few different
6828 error messages in each case. Return value may be zero meaning
6829 this definition is too screwy to try to parse.
6830 MEMFUNCDEF for a function definition. Like FUNCDEF but prepares to
6831 handle member functions (which have FIELD context).
6832 Return value may be zero meaning this definition is too screwy to
6834 PARM for a parameter declaration (either within a function prototype
6835 or before a function body). Make a PARM_DECL, or return void_type_node.
6836 CATCHPARM for a parameter declaration before a catch clause.
6837 TYPENAME if for a typename (in a cast or sizeof).
6838 Don't make a DECL node; just return the ..._TYPE node.
6839 FIELD for a struct or union field; make a FIELD_DECL.
6840 BITFIELD for a field with specified width.
6841 INITIALIZED is 1 if the decl has an initializer.
6843 ATTRLIST is a pointer to the list of attributes, which may be NULL
6844 if there are none; *ATTRLIST may be modified if attributes from inside
6845 the declarator should be applied to the declaration.
6847 When this function is called, scoping variables (such as
6848 CURRENT_CLASS_TYPE) should reflect the scope in which the
6849 declaration occurs, not the scope in which the new declaration will
6850 be placed. For example, on:
6854 when grokdeclarator is called for `S::f', the CURRENT_CLASS_TYPE
6857 Returns a DECL (if a declarator is present), a TYPE (if there is no
6858 declarator, in cases like "struct S;"), or the ERROR_MARK_NODE if an
6862 grokdeclarator (const cp_declarator *declarator,
6863 const cp_decl_specifier_seq *declspecs,
6864 enum decl_context decl_context,
6868 tree type = NULL_TREE;
6870 int virtualp, explicitp, friendp, inlinep, staticp;
6871 int explicit_int = 0;
6872 int explicit_char = 0;
6873 int defaulted_int = 0;
6874 tree dependent_name = NULL_TREE;
6876 tree typedef_decl = NULL_TREE;
6877 const char *name = NULL;
6878 tree typedef_type = NULL_TREE;
6879 /* True if this declarator is a function definition. */
6880 bool funcdef_flag = false;
6881 cp_declarator_kind innermost_code = cdk_error;
6884 /* See the code below that used this. */
6885 tree decl_attr = NULL_TREE;
6888 /* Keep track of what sort of function is being processed
6889 so that we can warn about default return values, or explicit
6890 return values which do not match prescribed defaults. */
6891 special_function_kind sfk = sfk_none;
6893 tree dname = NULL_TREE;
6894 tree ctor_return_type = NULL_TREE;
6895 enum overload_flags flags = NO_SPECIAL;
6896 /* cv-qualifiers that apply to the declarator, for a declaration of
6897 a member function. */
6898 cp_cv_quals memfn_quals = TYPE_UNQUALIFIED;
6899 /* cv-qualifiers that apply to the type specified by the DECLSPECS. */
6901 tree raises = NULL_TREE;
6902 int template_count = 0;
6903 tree returned_attrs = NULL_TREE;
6904 tree parms = NULL_TREE;
6905 const cp_declarator *id_declarator;
6906 /* The unqualified name of the declarator; either an
6907 IDENTIFIER_NODE, BIT_NOT_EXPR, or TEMPLATE_ID_EXPR. */
6908 tree unqualified_id;
6909 /* The class type, if any, in which this entity is located,
6910 or NULL_TREE if none. Note that this value may be different from
6911 the current class type; for example if an attempt is made to declare
6912 "A::f" inside "B", this value will be "A". */
6913 tree ctype = current_class_type;
6914 /* The NAMESPACE_DECL for the namespace in which this entity is
6915 located. If an unqualified name is used to declare the entity,
6916 this value will be NULL_TREE, even if the entity is located at
6918 tree in_namespace = NULL_TREE;
6919 cp_storage_class storage_class;
6920 bool unsigned_p, signed_p, short_p, long_p, thread_p;
6921 bool type_was_error_mark_node = false;
6923 signed_p = declspecs->specs[(int)ds_signed];
6924 unsigned_p = declspecs->specs[(int)ds_unsigned];
6925 short_p = declspecs->specs[(int)ds_short];
6926 long_p = declspecs->specs[(int)ds_long];
6927 longlong = declspecs->specs[(int)ds_long] >= 2;
6928 thread_p = declspecs->specs[(int)ds_thread];
6930 if (decl_context == FUNCDEF)
6931 funcdef_flag = true, decl_context = NORMAL;
6932 else if (decl_context == MEMFUNCDEF)
6933 funcdef_flag = true, decl_context = FIELD;
6934 else if (decl_context == BITFIELD)
6935 bitfield = 1, decl_context = FIELD;
6937 /* Look inside a declarator for the name being declared
6938 and get it as a string, for an error message. */
6939 for (id_declarator = declarator;
6941 id_declarator = id_declarator->declarator)
6943 if (id_declarator->kind != cdk_id)
6944 innermost_code = id_declarator->kind;
6946 switch (id_declarator->kind)
6949 if (id_declarator->declarator
6950 && id_declarator->declarator->kind == cdk_id)
6952 sfk = id_declarator->declarator->u.id.sfk;
6953 if (sfk == sfk_destructor)
6960 tree qualifying_scope = id_declarator->u.id.qualifying_scope;
6961 tree decl = id_declarator->u.id.unqualified_name;
6964 if (qualifying_scope)
6966 if (at_function_scope_p ())
6970 A declarator-id shall not be qualified except
6973 None of the cases are permitted in block
6975 if (qualifying_scope == global_namespace)
6976 error ("invalid use of qualified-name %<::%D%>",
6978 else if (TYPE_P (qualifying_scope))
6979 error ("invalid use of qualified-name %<%T::%D%>",
6980 qualifying_scope, decl);
6982 error ("invalid use of qualified-name %<%D::%D%>",
6983 qualifying_scope, decl);
6984 return error_mark_node;
6986 else if (TYPE_P (qualifying_scope))
6988 ctype = qualifying_scope;
6989 if (innermost_code != cdk_function
6990 && current_class_type
6991 && !UNIQUELY_DERIVED_FROM_P (ctype,
6992 current_class_type))
6994 error ("type %qT is not derived from type %qT",
6995 ctype, current_class_type);
6996 return error_mark_node;
6999 else if (TREE_CODE (qualifying_scope) == NAMESPACE_DECL)
7000 in_namespace = qualifying_scope;
7002 switch (TREE_CODE (decl))
7008 if (innermost_code != cdk_function)
7010 error ("declaration of %qD as non-function", decl);
7011 return error_mark_node;
7013 else if (!qualifying_scope
7014 && !(current_class_type && at_class_scope_p ()))
7016 error ("declaration of %qD as non-member", decl);
7017 return error_mark_node;
7020 type = TREE_OPERAND (decl, 0);
7021 name = IDENTIFIER_POINTER (constructor_name (type));
7026 case TEMPLATE_ID_EXPR:
7028 tree fns = TREE_OPERAND (decl, 0);
7031 if (TREE_CODE (dname) != IDENTIFIER_NODE)
7033 gcc_assert (is_overloaded_fn (dname));
7034 dname = DECL_NAME (get_first_fn (dname));
7039 case IDENTIFIER_NODE:
7040 if (TREE_CODE (decl) == IDENTIFIER_NODE)
7043 if (C_IS_RESERVED_WORD (dname))
7045 error ("declarator-id missing; using reserved word %qD",
7047 name = IDENTIFIER_POINTER (dname);
7049 else if (!IDENTIFIER_TYPENAME_P (dname))
7050 name = IDENTIFIER_POINTER (dname);
7053 gcc_assert (flags == NO_SPECIAL);
7054 flags = TYPENAME_FLAG;
7055 ctor_return_type = TREE_TYPE (dname);
7056 sfk = sfk_conversion;
7057 if (is_typename_at_global_scope (dname))
7058 name = IDENTIFIER_POINTER (dname);
7060 name = "<invalid operator>";
7076 return error_mark_node;
7082 if (id_declarator->kind == cdk_id)
7088 The declarator in a function-definition shall have the form
7089 D1 ( parameter-declaration-clause) ... */
7090 if (funcdef_flag && innermost_code != cdk_function)
7092 error ("function definition does not declare parameters");
7093 return error_mark_node;
7096 if (((dname && IDENTIFIER_OPNAME_P (dname)) || flags == TYPENAME_FLAG)
7097 && innermost_code != cdk_function
7098 && ! (ctype && !declspecs->any_specifiers_p))
7100 error ("declaration of %qD as non-function", dname);
7101 return error_mark_node;
7104 /* Anything declared one level down from the top level
7105 must be one of the parameters of a function
7106 (because the body is at least two levels down). */
7108 /* This heuristic cannot be applied to C++ nodes! Fixed, however,
7109 by not allowing C++ class definitions to specify their parameters
7110 with xdecls (must be spec.d in the parmlist).
7112 Since we now wait to push a class scope until we are sure that
7113 we are in a legitimate method context, we must set oldcname
7114 explicitly (since current_class_name is not yet alive).
7116 We also want to avoid calling this a PARM if it is in a namespace. */
7118 if (decl_context == NORMAL && !toplevel_bindings_p ())
7120 struct cp_binding_level *b = current_binding_level;
7121 current_binding_level = b->level_chain;
7122 if (current_binding_level != 0 && toplevel_bindings_p ())
7123 decl_context = PARM;
7124 current_binding_level = b;
7128 name = decl_context == PARM ? "parameter" : "type name";
7130 /* If there were multiple types specified in the decl-specifier-seq,
7131 issue an error message. */
7132 if (declspecs->multiple_types_p)
7134 error ("two or more data types in declaration of %qs", name);
7135 return error_mark_node;
7138 /* Extract the basic type from the decl-specifier-seq. */
7139 type = declspecs->type;
7140 if (type == error_mark_node)
7143 type_was_error_mark_node = true;
7145 /* If the entire declaration is itself tagged as deprecated then
7146 suppress reports of deprecated items. */
7147 if (type && TREE_DEPRECATED (type)
7148 && deprecated_state != DEPRECATED_SUPPRESS)
7149 warn_deprecated_use (type);
7150 if (type && TREE_CODE (type) == TYPE_DECL)
7152 typedef_decl = type;
7153 type = TREE_TYPE (typedef_decl);
7155 /* No type at all: default to `int', and set DEFAULTED_INT
7156 because it was not a user-defined typedef. */
7157 if (type == NULL_TREE && (signed_p || unsigned_p || long_p || short_p))
7159 /* These imply 'int'. */
7160 type = integer_type_node;
7164 explicit_int = declspecs->explicit_int_p;
7165 explicit_char = declspecs->explicit_char_p;
7168 /* See the code below that used this. */
7170 decl_attr = DECL_ATTRIBUTES (typedef_decl);
7172 typedef_type = type;
7175 if (sfk != sfk_conversion)
7176 ctor_return_type = ctype;
7178 if (sfk != sfk_none)
7179 type = check_special_function_return_type (sfk, type,
7181 else if (type == NULL_TREE)
7187 /* We handle `main' specially here, because 'main () { }' is so
7188 common. With no options, it is allowed. With -Wreturn-type,
7189 it is a warning. It is only an error with -pedantic-errors. */
7190 is_main = (funcdef_flag
7191 && dname && MAIN_NAME_P (dname)
7192 && ctype == NULL_TREE
7193 && in_namespace == NULL_TREE
7194 && current_namespace == global_namespace);
7196 if (type_was_error_mark_node)
7197 /* We've already issued an error, don't complain more. */;
7198 else if (in_system_header || flag_ms_extensions)
7199 /* Allow it, sigh. */;
7200 else if (pedantic || ! is_main)
7201 pedwarn ("ISO C++ forbids declaration of %qs with no type", name);
7202 else if (warn_return_type)
7203 warning (0, "ISO C++ forbids declaration of %qs with no type", name);
7205 type = integer_type_node;
7210 /* Now process the modifiers that were specified
7211 and check for invalid combinations. */
7213 /* Long double is a special combination. */
7214 if (long_p && !longlong && TYPE_MAIN_VARIANT (type) == double_type_node)
7217 type = build_qualified_type (long_double_type_node,
7218 cp_type_quals (type));
7221 /* Check all other uses of type modifiers. */
7223 if (unsigned_p || signed_p || long_p || short_p)
7227 if ((signed_p || unsigned_p) && TREE_CODE (type) != INTEGER_TYPE)
7228 error ("%<signed%> or %<unsigned%> invalid for %qs", name);
7229 else if (signed_p && unsigned_p)
7230 error ("%<signed%> and %<unsigned%> specified together for %qs", name);
7231 else if (longlong && TREE_CODE (type) != INTEGER_TYPE)
7232 error ("%<long long%> invalid for %qs", name);
7233 else if (long_p && TREE_CODE (type) == REAL_TYPE)
7234 error ("%<long%> invalid for %qs", name);
7235 else if (short_p && TREE_CODE (type) == REAL_TYPE)
7236 error ("%<short%> invalid for %qs", name);
7237 else if ((long_p || short_p) && TREE_CODE (type) != INTEGER_TYPE)
7238 error ("%<long%> or %<short%> invalid for %qs", name);
7239 else if ((long_p || short_p) && explicit_char)
7240 error ("%<long%> or %<short%> specified with char for %qs", name);
7241 else if (long_p && short_p)
7242 error ("%<long%> and %<short%> specified together for %qs", name);
7246 if (!explicit_int && !defaulted_int && !explicit_char && pedantic)
7248 pedwarn ("long, short, signed or unsigned used invalidly for %qs",
7250 if (flag_pedantic_errors)
7255 /* Discard the type modifiers if they are invalid. */
7266 /* Decide whether an integer type is signed or not.
7267 Optionally treat bitfields as signed by default. */
7271 It is implementation-defined whether a plain (neither
7272 explicitly signed or unsigned) char, short, int, or long
7273 bit-field is signed or unsigned.
7275 Naturally, we extend this to long long as well. Note that
7276 this does not include wchar_t. */
7277 || (bitfield && !flag_signed_bitfields
7279 /* A typedef for plain `int' without `signed' can be
7280 controlled just like plain `int', but a typedef for
7281 `signed int' cannot be so controlled. */
7283 && C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl))
7284 && TREE_CODE (type) == INTEGER_TYPE
7285 && !same_type_p (TYPE_MAIN_VARIANT (type), wchar_type_node)))
7288 type = long_long_unsigned_type_node;
7290 type = long_unsigned_type_node;
7292 type = short_unsigned_type_node;
7293 else if (type == char_type_node)
7294 type = unsigned_char_type_node;
7295 else if (typedef_decl)
7296 type = c_common_unsigned_type (type);
7298 type = unsigned_type_node;
7300 else if (signed_p && type == char_type_node)
7301 type = signed_char_type_node;
7303 type = long_long_integer_type_node;
7305 type = long_integer_type_node;
7307 type = short_integer_type_node;
7309 if (declspecs->specs[(int)ds_complex])
7311 if (TREE_CODE (type) != INTEGER_TYPE && TREE_CODE (type) != REAL_TYPE)
7312 error ("complex invalid for %qs", name);
7313 /* If we just have "complex", it is equivalent to
7314 "complex double", but if any modifiers at all are specified it is
7315 the complex form of TYPE. E.g, "complex short" is
7316 "complex short int". */
7318 else if (defaulted_int && ! longlong
7319 && ! (long_p || short_p || signed_p || unsigned_p))
7320 type = complex_double_type_node;
7321 else if (type == integer_type_node)
7322 type = complex_integer_type_node;
7323 else if (type == float_type_node)
7324 type = complex_float_type_node;
7325 else if (type == double_type_node)
7326 type = complex_double_type_node;
7327 else if (type == long_double_type_node)
7328 type = complex_long_double_type_node;
7330 type = build_complex_type (type);
7333 type_quals = TYPE_UNQUALIFIED;
7334 if (declspecs->specs[(int)ds_const])
7335 type_quals |= TYPE_QUAL_CONST;
7336 if (declspecs->specs[(int)ds_volatile])
7337 type_quals |= TYPE_QUAL_VOLATILE;
7338 if (declspecs->specs[(int)ds_restrict])
7339 type_quals |= TYPE_QUAL_RESTRICT;
7340 if (sfk == sfk_conversion && type_quals != TYPE_UNQUALIFIED)
7341 error ("qualifiers are not allowed on declaration of %<operator %T%>",
7344 if (TREE_CODE (type) == FUNCTION_TYPE
7345 && type_quals != TYPE_UNQUALIFIED)
7347 /* This was an error in C++98 (cv-qualifiers cannot be added to
7348 a function type), but DR 295 makes the code well-formed by
7349 dropping the extra qualifiers. */
7352 tree bad_type = build_qualified_type (type, type_quals);
7353 pedwarn ("ignoring %qV qualifiers added to function type %qT",
7356 type_quals = TYPE_UNQUALIFIED;
7358 type_quals |= cp_type_quals (type);
7359 type = cp_build_qualified_type_real
7360 (type, type_quals, ((typedef_decl && !DECL_ARTIFICIAL (typedef_decl)
7361 ? tf_ignore_bad_quals : 0) | tf_warning_or_error));
7362 /* We might have ignored or rejected some of the qualifiers. */
7363 type_quals = cp_type_quals (type);
7366 inlinep = !! declspecs->specs[(int)ds_inline];
7367 virtualp = !! declspecs->specs[(int)ds_virtual];
7368 explicitp = !! declspecs->specs[(int)ds_explicit];
7370 storage_class = declspecs->storage_class;
7371 if (storage_class == sc_static)
7372 staticp = 1 + (decl_context == FIELD);
7374 if (virtualp && staticp == 2)
7376 error ("member %qD cannot be declared both virtual and static", dname);
7377 storage_class = sc_none;
7380 friendp = !! declspecs->specs[(int)ds_friend];
7382 if (dependent_name && !friendp)
7384 error ("%<%T::%D%> is not a valid declarator", ctype, dependent_name);
7385 return error_mark_node;
7388 /* Issue errors about use of storage classes for parameters. */
7389 if (decl_context == PARM)
7391 if (declspecs->specs[(int)ds_typedef])
7393 error ("typedef declaration invalid in parameter declaration");
7394 return error_mark_node;
7396 else if (storage_class == sc_static
7397 || storage_class == sc_extern
7399 error ("storage class specifiers invalid in parameter declarations");
7402 /* Give error if `virtual' is used outside of class declaration. */
7404 && (current_class_name == NULL_TREE || decl_context != FIELD))
7406 error ("virtual outside class declaration");
7410 /* Static anonymous unions are dealt with here. */
7411 if (staticp && decl_context == TYPENAME
7413 && ANON_AGGR_TYPE_P (declspecs->type))
7414 decl_context = FIELD;
7416 /* Warn about storage classes that are invalid for certain
7417 kinds of declarations (parameters, typenames, etc.). */
7418 if (declspecs->conflicting_specifiers_p)
7420 error ("conflicting specifiers in declaration of %qs", name);
7421 storage_class = sc_none;
7425 && storage_class != sc_extern
7426 && storage_class != sc_static)
7427 || declspecs->specs[(int)ds_typedef]))
7429 error ("multiple storage classes in declaration of %qs", name);
7432 else if (decl_context != NORMAL
7433 && ((storage_class != sc_none
7434 && storage_class != sc_mutable)
7437 if ((decl_context == PARM || decl_context == CATCHPARM)
7438 && (storage_class == sc_register
7439 || storage_class == sc_auto))
7441 else if (declspecs->specs[(int)ds_typedef])
7443 else if (decl_context == FIELD
7444 /* C++ allows static class elements. */
7445 && storage_class == sc_static)
7446 /* C++ also allows inlines and signed and unsigned elements,
7447 but in those cases we don't come in here. */
7451 if (decl_context == FIELD)
7452 error ("storage class specified for %qs", name);
7455 if (decl_context == PARM || decl_context == CATCHPARM)
7456 error ("storage class specified for parameter %qs", name);
7458 error ("storage class specified for typename");
7460 if (storage_class == sc_register
7461 || storage_class == sc_auto
7462 || storage_class == sc_extern
7464 storage_class = sc_none;
7467 else if (storage_class == sc_extern && initialized
7470 if (toplevel_bindings_p ())
7472 /* It's common practice (and completely valid) to have a const
7473 be initialized and declared extern. */
7474 if (!(type_quals & TYPE_QUAL_CONST))
7475 warning (0, "%qs initialized and declared %<extern%>", name);
7478 error ("%qs has both %<extern%> and initializer", name);
7480 else if (storage_class == sc_extern && funcdef_flag
7481 && ! toplevel_bindings_p ())
7482 error ("nested function %qs declared %<extern%>", name);
7483 else if (toplevel_bindings_p ())
7485 if (storage_class == sc_auto)
7486 error ("top-level declaration of %qs specifies %<auto%>", name);
7489 && storage_class != sc_extern
7490 && storage_class != sc_static)
7492 error ("function-scope %qs implicitly auto and declared %<__thread%>",
7497 if (storage_class && friendp)
7498 error ("storage class specifiers invalid in friend function declarations");
7501 unqualified_id = NULL_TREE;
7504 unqualified_id = id_declarator->u.id.unqualified_name;
7505 switch (TREE_CODE (unqualified_id))
7509 = constructor_name (TREE_OPERAND (unqualified_id, 0));
7512 case IDENTIFIER_NODE:
7513 case TEMPLATE_ID_EXPR:
7521 /* Determine the type of the entity declared by recurring on the
7523 for (; declarator; declarator = declarator->declarator)
7525 const cp_declarator *inner_declarator;
7528 if (type == error_mark_node)
7529 return error_mark_node;
7531 attrs = declarator->attributes;
7537 if (declarator == NULL || declarator->kind == cdk_id)
7538 attr_flags |= (int) ATTR_FLAG_DECL_NEXT;
7539 if (declarator->kind == cdk_function)
7540 attr_flags |= (int) ATTR_FLAG_FUNCTION_NEXT;
7541 if (declarator->kind == cdk_array)
7542 attr_flags |= (int) ATTR_FLAG_ARRAY_NEXT;
7543 returned_attrs = decl_attributes (&type,
7544 chainon (returned_attrs, attrs),
7548 if (declarator->kind == cdk_id)
7551 inner_declarator = declarator->declarator;
7553 switch (declarator->kind)
7556 type = create_array_type_for_decl (dname, type,
7557 declarator->u.array.bounds);
7565 /* Declaring a function type.
7566 Make sure we have a valid type for the function to return. */
7568 /* We now know that the TYPE_QUALS don't apply to the
7569 decl, but to its return type. */
7570 type_quals = TYPE_UNQUALIFIED;
7572 /* Warn about some types functions can't return. */
7574 if (TREE_CODE (type) == FUNCTION_TYPE)
7576 error ("%qs declared as function returning a function", name);
7577 type = integer_type_node;
7579 if (TREE_CODE (type) == ARRAY_TYPE)
7581 error ("%qs declared as function returning an array", name);
7582 type = integer_type_node;
7585 /* Pick up type qualifiers which should be applied to `this'. */
7586 memfn_quals = declarator->u.function.qualifiers;
7588 /* Pick up the exception specifications. */
7589 raises = declarator->u.function.exception_specification;
7591 /* Say it's a definition only for the CALL_EXPR
7592 closest to the identifier. */
7593 funcdecl_p = inner_declarator && inner_declarator->kind == cdk_id;
7595 if (ctype == NULL_TREE
7596 && decl_context == FIELD
7598 && (friendp == 0 || dname == current_class_name))
7599 ctype = current_class_type;
7601 if (ctype && (sfk == sfk_constructor
7602 || sfk == sfk_destructor))
7604 /* We are within a class's scope. If our declarator name
7605 is the same as the class name, and we are defining
7606 a function, then it is a constructor/destructor, and
7607 therefore returns a void type. */
7609 /* ISO C++ 12.4/2. A destructor may not be declared
7610 const or volatile. A destructor may not be
7613 ISO C++ 12.1. A constructor may not be declared
7614 const or volatile. A constructor may not be
7615 virtual. A constructor may not be static. */
7617 error ((flags == DTOR_FLAG)
7618 ? "destructor cannot be static member function"
7619 : "constructor cannot be static member function");
7622 error ((flags == DTOR_FLAG)
7623 ? "destructors may not be cv-qualified"
7624 : "constructors may not be cv-qualified");
7625 memfn_quals = TYPE_UNQUALIFIED;
7628 if (decl_context == FIELD
7629 && !member_function_or_else (ctype,
7632 return error_mark_node;
7634 if (flags != DTOR_FLAG)
7636 /* It's a constructor. */
7641 pedwarn ("constructors cannot be declared virtual");
7644 if (decl_context == FIELD
7645 && sfk != sfk_constructor)
7646 return error_mark_node;
7648 if (decl_context == FIELD)
7654 error ("can't initialize friend function %qs", name);
7657 /* Cannot be both friend and virtual. */
7658 error ("virtual functions cannot be friends");
7661 if (decl_context == NORMAL)
7662 error ("friend declaration not in class definition");
7663 if (current_function_decl && funcdef_flag)
7664 error ("can't define friend function %qs in a local "
7669 arg_types = grokparms (declarator->u.function.parameters,
7672 if (inner_declarator
7673 && inner_declarator->kind == cdk_id
7674 && inner_declarator->u.id.sfk == sfk_destructor
7675 && arg_types != void_list_node)
7677 error ("destructors may not have parameters");
7678 arg_types = void_list_node;
7682 type = build_function_type (type, arg_types);
7689 /* Filter out pointers-to-references and references-to-references.
7690 We can get these if a TYPE_DECL is used. */
7692 if (TREE_CODE (type) == REFERENCE_TYPE)
7694 error (declarator->kind == cdk_reference
7695 ? "cannot declare reference to %q#T"
7696 : "cannot declare pointer to %q#T", type);
7697 type = TREE_TYPE (type);
7699 else if (VOID_TYPE_P (type))
7701 if (declarator->kind == cdk_reference)
7702 error ("cannot declare reference to %q#T", type);
7703 else if (declarator->kind == cdk_ptrmem)
7704 error ("cannot declare pointer to %q#T member", type);
7707 /* We now know that the TYPE_QUALS don't apply to the decl,
7708 but to the target of the pointer. */
7709 type_quals = TYPE_UNQUALIFIED;
7711 if (declarator->kind == cdk_ptrmem
7712 && (TREE_CODE (type) == FUNCTION_TYPE || memfn_quals))
7714 memfn_quals |= cp_type_quals (type);
7715 type = build_memfn_type (type,
7716 declarator->u.pointer.class_type,
7718 memfn_quals = TYPE_UNQUALIFIED;
7721 if (declarator->kind == cdk_reference)
7723 if (!VOID_TYPE_P (type))
7724 type = build_reference_type (type);
7726 else if (TREE_CODE (type) == METHOD_TYPE)
7727 type = build_ptrmemfunc_type (build_pointer_type (type));
7728 else if (declarator->kind == cdk_ptrmem)
7730 gcc_assert (TREE_CODE (declarator->u.pointer.class_type)
7732 if (declarator->u.pointer.class_type == error_mark_node)
7733 /* We will already have complained. */
7734 type = error_mark_node;
7736 type = build_ptrmem_type (declarator->u.pointer.class_type,
7740 type = build_pointer_type (type);
7742 /* Process a list of type modifier keywords (such as
7743 const or volatile) that were given inside the `*' or `&'. */
7745 if (declarator->u.pointer.qualifiers)
7748 = cp_build_qualified_type (type,
7749 declarator->u.pointer.qualifiers);
7750 type_quals = cp_type_quals (type);
7763 if (unqualified_id && TREE_CODE (unqualified_id) == TEMPLATE_ID_EXPR
7764 && TREE_CODE (type) != FUNCTION_TYPE
7765 && TREE_CODE (type) != METHOD_TYPE)
7767 error ("template-id %qD used as a declarator",
7769 unqualified_id = dname;
7772 /* If TYPE is a FUNCTION_TYPE, but the function name was explicitly
7773 qualified with a class-name, turn it into a METHOD_TYPE, unless
7774 we know that the function is static. We take advantage of this
7775 opportunity to do other processing that pertains to entities
7776 explicitly declared to be class members. Note that if DECLARATOR
7777 is non-NULL, we know it is a cdk_id declarator; otherwise, we
7778 would not have exited the loop above. */
7780 && declarator->u.id.qualifying_scope
7781 && TYPE_P (declarator->u.id.qualifying_scope))
7785 ctype = declarator->u.id.qualifying_scope;
7786 ctype = TYPE_MAIN_VARIANT (ctype);
7788 while (t != NULL_TREE && CLASS_TYPE_P (t))
7790 /* You're supposed to have one `template <...>' for every
7791 template class, but you don't need one for a full
7792 specialization. For example:
7794 template <class T> struct S{};
7795 template <> struct S<int> { void f(); };
7796 void S<int>::f () {}
7798 is correct; there shouldn't be a `template <>' for the
7799 definition of `S<int>::f'. */
7800 if (CLASSTYPE_TEMPLATE_SPECIALIZATION (t)
7801 && !any_dependent_template_arguments_p (CLASSTYPE_TI_ARGS (t)))
7802 /* T is an explicit (not partial) specialization. All
7803 containing classes must therefore also be explicitly
7806 if ((CLASSTYPE_USE_TEMPLATE (t) || CLASSTYPE_IS_TEMPLATE (t))
7807 && PRIMARY_TEMPLATE_P (CLASSTYPE_TI_TEMPLATE (t)))
7808 template_count += 1;
7810 t = TYPE_MAIN_DECL (t);
7811 t = DECL_CONTEXT (t);
7814 if (ctype == current_class_type)
7817 pedwarn ("member functions are implicitly friends of their class");
7819 pedwarn ("extra qualification %<%T::%> on member %qs",
7822 else if (/* If the qualifying type is already complete, then we
7823 can skip the following checks. */
7824 !COMPLETE_TYPE_P (ctype)
7825 && (/* If the function is being defined, then
7826 qualifying type must certainly be complete. */
7828 /* A friend declaration of "T::f" is OK, even if
7829 "T" is a template parameter. But, if this
7830 function is not a friend, the qualifying type
7832 || (!friendp && !CLASS_TYPE_P (ctype))
7833 /* For a declaration, the type need not be
7834 complete, if either it is dependent (since there
7835 is no meaningful definition of complete in that
7836 case) or the qualifying class is currently being
7838 || !(dependent_type_p (ctype)
7839 || currently_open_class (ctype)))
7840 /* Check that the qualifying type is complete. */
7841 && !complete_type_or_else (ctype, NULL_TREE))
7842 return error_mark_node;
7843 else if (TREE_CODE (type) == FUNCTION_TYPE)
7845 tree sname = declarator->u.id.unqualified_name;
7847 if (current_class_type
7848 && (!friendp || funcdef_flag))
7851 ? "cannot define member function %<%T::%s%> within %<%T%>"
7852 : "cannot declare member function %<%T::%s%> within %<%T%>",
7853 ctype, name, current_class_type);
7854 return error_mark_node;
7857 if (TREE_CODE (sname) == IDENTIFIER_NODE
7858 && NEW_DELETE_OPNAME_P (sname))
7859 /* Overloaded operator new and operator delete
7860 are always static functions. */
7863 type = build_memfn_type (type, ctype, memfn_quals);
7865 else if (declspecs->specs[(int)ds_typedef]
7866 && current_class_type)
7868 error ("cannot declare member %<%T::%s%> within %qT",
7869 ctype, name, current_class_type);
7870 return error_mark_node;
7874 /* Now TYPE has the actual type. */
7879 *attrlist = chainon (returned_attrs, *attrlist);
7881 attrlist = &returned_attrs;
7884 /* Did array size calculations overflow? */
7886 if (TREE_CODE (type) == ARRAY_TYPE
7887 && COMPLETE_TYPE_P (type)
7888 && TREE_CODE (TYPE_SIZE_UNIT (type)) == INTEGER_CST
7889 && TREE_OVERFLOW (TYPE_SIZE_UNIT (type)))
7891 error ("size of array %qs is too large", name);
7892 /* If we proceed with the array type as it is, we'll eventually
7893 crash in tree_low_cst(). */
7894 type = error_mark_node;
7897 if ((decl_context == FIELD || decl_context == PARM)
7898 && !processing_template_decl
7899 && variably_modified_type_p (type, NULL_TREE))
7901 if (decl_context == FIELD)
7902 error ("data member may not have variably modified type %qT", type);
7904 error ("parameter may not have variably modified type %qT", type);
7905 type = error_mark_node;
7908 if (explicitp == 1 || (explicitp && friendp))
7910 /* [dcl.fct.spec] The explicit specifier shall only be used in
7911 declarations of constructors within a class definition. */
7912 error ("only declarations of constructors can be %<explicit%>");
7916 if (storage_class == sc_mutable)
7918 if (decl_context != FIELD || friendp)
7920 error ("non-member %qs cannot be declared %<mutable%>", name);
7921 storage_class = sc_none;
7923 else if (decl_context == TYPENAME || declspecs->specs[(int)ds_typedef])
7925 error ("non-object member %qs cannot be declared %<mutable%>", name);
7926 storage_class = sc_none;
7928 else if (TREE_CODE (type) == FUNCTION_TYPE
7929 || TREE_CODE (type) == METHOD_TYPE)
7931 error ("function %qs cannot be declared %<mutable%>", name);
7932 storage_class = sc_none;
7936 error ("static %qs cannot be declared %<mutable%>", name);
7937 storage_class = sc_none;
7939 else if (type_quals & TYPE_QUAL_CONST)
7941 error ("const %qs cannot be declared %<mutable%>", name);
7942 storage_class = sc_none;
7946 /* If this is declaring a typedef name, return a TYPE_DECL. */
7947 if (declspecs->specs[(int)ds_typedef] && decl_context != TYPENAME)
7951 /* Note that the grammar rejects storage classes
7952 in typenames, fields or parameters. */
7953 if (current_lang_name == lang_name_java)
7954 TYPE_FOR_JAVA (type) = 1;
7956 /* This declaration:
7958 typedef void f(int) const;
7960 declares a function type which is not a member of any
7961 particular class, but which is cv-qualified; for
7962 example "f S::*" declares a pointer to a const-qualified
7963 member function of S. We record the cv-qualification in the
7965 if (memfn_quals && TREE_CODE (type) == FUNCTION_TYPE)
7966 type = cp_build_qualified_type (type, memfn_quals);
7968 if (decl_context == FIELD)
7969 decl = build_lang_decl (TYPE_DECL, unqualified_id, type);
7971 decl = build_decl (TYPE_DECL, unqualified_id, type);
7972 if (id_declarator && declarator->u.id.qualifying_scope)
7973 error ("%Jtypedef name may not be a nested-name-specifier", decl);
7975 if (decl_context != FIELD)
7977 if (!current_function_decl)
7978 DECL_CONTEXT (decl) = FROB_CONTEXT (current_namespace);
7979 else if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (current_function_decl)
7980 || (DECL_MAYBE_IN_CHARGE_DESTRUCTOR_P
7981 (current_function_decl)))
7982 /* The TYPE_DECL is "abstract" because there will be
7983 clones of this constructor/destructor, and there will
7984 be copies of this TYPE_DECL generated in those
7986 DECL_ABSTRACT (decl) = 1;
7988 else if (constructor_name_p (unqualified_id, current_class_type))
7989 pedwarn ("ISO C++ forbids nested type %qD with same name "
7990 "as enclosing class",
7993 /* If the user declares "typedef struct {...} foo" then the
7994 struct will have an anonymous name. Fill that name in now.
7995 Nothing can refer to it, so nothing needs know about the name
7997 if (type != error_mark_node
8000 && TREE_CODE (TYPE_NAME (type)) == TYPE_DECL
8001 && TYPE_ANONYMOUS_P (type)
8002 /* Don't do this if there are attributes. */
8003 && (!attrlist || !*attrlist)
8004 && cp_type_quals (type) == TYPE_UNQUALIFIED)
8006 tree oldname = TYPE_NAME (type);
8009 /* Replace the anonymous name with the real name everywhere. */
8010 for (t = TYPE_MAIN_VARIANT (type); t; t = TYPE_NEXT_VARIANT (t))
8011 if (TYPE_NAME (t) == oldname)
8012 TYPE_NAME (t) = decl;
8014 if (TYPE_LANG_SPECIFIC (type))
8015 TYPE_WAS_ANONYMOUS (type) = 1;
8017 /* If this is a typedef within a template class, the nested
8018 type is a (non-primary) template. The name for the
8019 template needs updating as well. */
8020 if (TYPE_LANG_SPECIFIC (type) && CLASSTYPE_TEMPLATE_INFO (type))
8021 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type))
8022 = TYPE_IDENTIFIER (type);
8024 /* FIXME remangle member functions; member functions of a
8025 type with external linkage have external linkage. */
8028 /* Any qualifiers on a function type typedef have already been
8030 if (memfn_quals && !ctype && TREE_CODE (type) == FUNCTION_TYPE)
8031 memfn_quals = TYPE_UNQUALIFIED;
8034 || (typedef_decl && C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl)))
8035 C_TYPEDEF_EXPLICITLY_SIGNED (decl) = 1;
8037 bad_specifiers (decl, "type", virtualp,
8038 memfn_quals != TYPE_UNQUALIFIED,
8039 inlinep, friendp, raises != NULL_TREE);
8044 /* Detect the case of an array type of unspecified size
8045 which came, as such, direct from a typedef name.
8046 We must copy the type, so that the array's domain can be
8047 individually set by the object's initializer. */
8049 if (type && typedef_type
8050 && TREE_CODE (type) == ARRAY_TYPE && !TYPE_DOMAIN (type)
8051 && TYPE_MAIN_VARIANT (type) == TYPE_MAIN_VARIANT (typedef_type))
8052 type = build_cplus_array_type (TREE_TYPE (type), NULL_TREE);
8054 /* Detect where we're using a typedef of function type to declare a
8055 function. PARMS will not be set, so we must create it now. */
8057 if (type == typedef_type && TREE_CODE (type) == FUNCTION_TYPE)
8059 tree decls = NULL_TREE;
8062 for (args = TYPE_ARG_TYPES (type); args; args = TREE_CHAIN (args))
8064 tree decl = cp_build_parm_decl (NULL_TREE, TREE_VALUE (args));
8066 TREE_CHAIN (decl) = decls;
8070 parms = nreverse (decls);
8072 if (decl_context != TYPENAME)
8074 /* A cv-qualifier-seq shall only be part of the function type
8075 for a non-static member function. [8.3.5/4 dcl.fct] */
8076 if (cp_type_quals (type) != TYPE_UNQUALIFIED
8077 && (current_class_type == NULL_TREE || staticp) )
8079 error ("qualified function types cannot be used to declare %s functions",
8080 (staticp? "static member" : "free"));
8081 type = TYPE_MAIN_VARIANT (type);
8084 /* The qualifiers on the function type become the qualifiers on
8085 the non-static member function. */
8086 memfn_quals |= cp_type_quals (type);
8090 /* If this is a type name (such as, in a cast or sizeof),
8091 compute the type and return it now. */
8093 if (decl_context == TYPENAME)
8095 /* Note that the grammar rejects storage classes
8096 in typenames, fields or parameters. */
8097 if (type_quals != TYPE_UNQUALIFIED)
8098 type_quals = TYPE_UNQUALIFIED;
8100 /* Special case: "friend class foo" looks like a TYPENAME context. */
8103 if (type_quals != TYPE_UNQUALIFIED)
8105 error ("type qualifiers specified for friend class declaration");
8106 type_quals = TYPE_UNQUALIFIED;
8110 error ("%<inline%> specified for friend class declaration");
8116 /* Don't allow friend declaration without a class-key. */
8117 if (TREE_CODE (type) == TEMPLATE_TYPE_PARM)
8118 pedwarn ("template parameters cannot be friends");
8119 else if (TREE_CODE (type) == TYPENAME_TYPE)
8120 pedwarn ("friend declaration requires class-key, "
8121 "i.e. %<friend class %T::%D%>",
8122 TYPE_CONTEXT (type), TYPENAME_TYPE_FULLNAME (type));
8124 pedwarn ("friend declaration requires class-key, "
8125 "i.e. %<friend %#T%>",
8129 /* Only try to do this stuff if we didn't already give up. */
8130 if (type != integer_type_node)
8132 /* A friendly class? */
8133 if (current_class_type)
8134 make_friend_class (current_class_type, TYPE_MAIN_VARIANT (type),
8137 error ("trying to make class %qT a friend of global scope",
8140 type = void_type_node;
8143 else if (memfn_quals)
8145 if (ctype == NULL_TREE)
8147 if (TREE_CODE (type) != METHOD_TYPE)
8148 error ("invalid qualifiers on non-member function type");
8150 ctype = TYPE_METHOD_BASETYPE (type);
8153 type = build_memfn_type (type, ctype, memfn_quals);
8158 else if (unqualified_id == NULL_TREE && decl_context != PARM
8159 && decl_context != CATCHPARM
8160 && TREE_CODE (type) != UNION_TYPE
8163 error ("abstract declarator %qT used as declaration", type);
8164 return error_mark_node;
8167 /* Only functions may be declared using an operator-function-id. */
8169 && IDENTIFIER_OPNAME_P (unqualified_id)
8170 && TREE_CODE (type) != FUNCTION_TYPE
8171 && TREE_CODE (type) != METHOD_TYPE)
8173 error ("declaration of %qD as non-function", unqualified_id);
8174 return error_mark_node;
8177 /* We don't check parameter types here because we can emit a better
8178 error message later. */
8179 if (decl_context != PARM)
8181 type = check_var_type (unqualified_id, type);
8182 if (type == error_mark_node)
8183 return error_mark_node;
8186 /* Now create the decl, which may be a VAR_DECL, a PARM_DECL
8187 or a FUNCTION_DECL, depending on DECL_CONTEXT and TYPE. */
8189 if (decl_context == PARM || decl_context == CATCHPARM)
8191 if (ctype || in_namespace)
8192 error ("cannot use %<::%> in parameter declaration");
8194 /* A parameter declared as an array of T is really a pointer to T.
8195 One declared as a function is really a pointer to a function.
8196 One declared as a member is really a pointer to member. */
8198 if (TREE_CODE (type) == ARRAY_TYPE)
8200 /* Transfer const-ness of array into that of type pointed to. */
8201 type = build_pointer_type (TREE_TYPE (type));
8202 type_quals = TYPE_UNQUALIFIED;
8204 else if (TREE_CODE (type) == FUNCTION_TYPE)
8205 type = build_pointer_type (type);
8211 if (decl_context == PARM)
8213 decl = cp_build_parm_decl (unqualified_id, type);
8215 bad_specifiers (decl, "parameter", virtualp,
8216 memfn_quals != TYPE_UNQUALIFIED,
8217 inlinep, friendp, raises != NULL_TREE);
8219 else if (decl_context == FIELD)
8221 /* The C99 flexible array extension. */
8222 if (!staticp && TREE_CODE (type) == ARRAY_TYPE
8223 && TYPE_DOMAIN (type) == NULL_TREE)
8225 tree itype = compute_array_index_type (dname, integer_zero_node);
8226 type = build_cplus_array_type (TREE_TYPE (type), itype);
8229 if (type == error_mark_node)
8231 /* Happens when declaring arrays of sizes which
8232 are error_mark_node, for example. */
8235 else if (in_namespace && !friendp)
8237 /* Something like struct S { int N::j; }; */
8238 error ("invalid use of %<::%>");
8239 return error_mark_node;
8241 else if (TREE_CODE (type) == FUNCTION_TYPE)
8244 tree function_context;
8248 if (ctype == NULL_TREE)
8249 ctype = current_class_type;
8251 if (ctype == NULL_TREE)
8253 error ("can't make %qD into a method -- not in a class",
8255 return error_mark_node;
8258 /* ``A union may [ ... ] not [ have ] virtual functions.''
8260 if (virtualp && TREE_CODE (ctype) == UNION_TYPE)
8262 error ("function %qD declared virtual inside a union",
8264 return error_mark_node;
8267 if (NEW_DELETE_OPNAME_P (unqualified_id))
8271 error ("%qD cannot be declared virtual, since it "
8277 else if (staticp < 2)
8278 type = build_memfn_type (type, ctype, memfn_quals);
8281 /* Check that the name used for a destructor makes sense. */
8282 if (sfk == sfk_destructor)
8286 gcc_assert (friendp);
8287 error ("expected qualified name in friend declaration "
8288 "for destructor %qD",
8289 id_declarator->u.id.unqualified_name);
8290 return error_mark_node;
8293 if (!same_type_p (TREE_OPERAND
8294 (id_declarator->u.id.unqualified_name, 0),
8297 error ("declaration of %qD as member of %qT",
8298 id_declarator->u.id.unqualified_name, ctype);
8299 return error_mark_node;
8303 /* Tell grokfndecl if it needs to set TREE_PUBLIC on the node. */
8304 function_context = (ctype != NULL_TREE) ?
8305 decl_function_context (TYPE_MAIN_DECL (ctype)) : NULL_TREE;
8306 publicp = (! friendp || ! staticp)
8307 && function_context == NULL_TREE;
8308 decl = grokfndecl (ctype, type,
8309 TREE_CODE (unqualified_id) != TEMPLATE_ID_EXPR
8310 ? unqualified_id : dname,
8313 virtualp, flags, memfn_quals, raises,
8314 friendp ? -1 : 0, friendp, publicp, inlinep,
8316 funcdef_flag, template_count, in_namespace, attrlist);
8317 if (decl == NULL_TREE)
8318 return error_mark_node;
8320 /* This clobbers the attrs stored in `decl' from `attrlist'. */
8321 /* The decl and setting of decl_attr is also turned off. */
8322 decl = build_decl_attribute_variant (decl, decl_attr);
8325 /* [class.conv.ctor]
8327 A constructor declared without the function-specifier
8328 explicit that can be called with a single parameter
8329 specifies a conversion from the type of its first
8330 parameter to the type of its class. Such a constructor
8331 is called a converting constructor. */
8333 DECL_NONCONVERTING_P (decl) = 1;
8334 else if (DECL_CONSTRUCTOR_P (decl))
8336 /* The constructor can be called with exactly one
8337 parameter if there is at least one parameter, and
8338 any subsequent parameters have default arguments.
8339 Ignore any compiler-added parms. */
8340 tree arg_types = FUNCTION_FIRST_USER_PARMTYPE (decl);
8342 if (arg_types == void_list_node
8344 && TREE_CHAIN (arg_types)
8345 && TREE_CHAIN (arg_types) != void_list_node
8346 && !TREE_PURPOSE (TREE_CHAIN (arg_types))))
8347 DECL_NONCONVERTING_P (decl) = 1;
8350 else if (TREE_CODE (type) == METHOD_TYPE)
8352 /* We only get here for friend declarations of
8353 members of other classes. */
8354 /* All method decls are public, so tell grokfndecl to set
8355 TREE_PUBLIC, also. */
8356 decl = grokfndecl (ctype, type,
8357 TREE_CODE (unqualified_id) != TEMPLATE_ID_EXPR
8358 ? unqualified_id : dname,
8361 virtualp, flags, memfn_quals, raises,
8362 friendp ? -1 : 0, friendp, 1, 0, sfk,
8363 funcdef_flag, template_count, in_namespace,
8365 if (decl == NULL_TREE)
8366 return error_mark_node;
8368 else if (!staticp && !dependent_type_p (type)
8369 && !COMPLETE_TYPE_P (complete_type (type))
8370 && (TREE_CODE (type) != ARRAY_TYPE || initialized == 0))
8373 error ("field %qD has incomplete type", unqualified_id);
8375 error ("name %qT has incomplete type", type);
8377 /* If we're instantiating a template, tell them which
8378 instantiation made the field's type be incomplete. */
8379 if (current_class_type
8380 && TYPE_NAME (current_class_type)
8381 && IDENTIFIER_TEMPLATE (TYPE_IDENTIFIER (current_class_type))
8383 && declspecs->type == type)
8384 error (" in instantiation of template %qT",
8385 current_class_type);
8387 return error_mark_node;
8393 error ("%qE is neither function nor member function; "
8394 "cannot be declared friend", unqualified_id);
8402 /* Friends are treated specially. */
8403 if (ctype == current_class_type)
8404 ; /* We already issued a pedwarn. */
8405 else if (decl && DECL_NAME (decl))
8407 if (template_class_depth (current_class_type) == 0)
8409 decl = check_explicit_specialization
8410 (unqualified_id, decl, template_count,
8411 2 * funcdef_flag + 4);
8412 if (decl == error_mark_node)
8413 return error_mark_node;
8416 decl = do_friend (ctype, unqualified_id, decl,
8422 return error_mark_node;
8425 /* Structure field. It may not be a function, except for C++. */
8427 if (decl == NULL_TREE)
8433 /* An attempt is being made to initialize a non-static
8434 member. But, from [class.mem]:
8436 4 A member-declarator can contain a
8437 constant-initializer only if it declares a static
8438 member (_class.static_) of integral or enumeration
8439 type, see _class.static.data_.
8441 This used to be relatively common practice, but
8442 the rest of the compiler does not correctly
8443 handle the initialization unless the member is
8444 static so we make it static below. */
8445 pedwarn ("ISO C++ forbids initialization of member %qD",
8447 pedwarn ("making %qD static", unqualified_id);
8451 if (uses_template_parms (type))
8452 /* We'll check at instantiation time. */
8454 else if (check_static_variable_definition (unqualified_id,
8456 /* If we just return the declaration, crashes
8457 will sometimes occur. We therefore return
8458 void_type_node, as if this was a friend
8459 declaration, to cause callers to completely
8460 ignore this declaration. */
8461 return error_mark_node;
8466 /* C++ allows static class members. All other work
8467 for this is done by grokfield. */
8468 decl = build_lang_decl (VAR_DECL, unqualified_id, type);
8469 set_linkage_for_static_data_member (decl);
8470 /* Even if there is an in-class initialization, DECL
8471 is considered undefined until an out-of-class
8472 definition is provided. */
8473 DECL_EXTERNAL (decl) = 1;
8477 if (targetm.have_tls)
8478 DECL_TLS_MODEL (decl) = decl_default_tls_model (decl);
8480 /* A mere warning is sure to result in improper
8481 semantics at runtime. Don't bother to allow this to
8483 error ("thread-local storage not supported for this target");
8488 decl = build_decl (FIELD_DECL, unqualified_id, type);
8489 DECL_NONADDRESSABLE_P (decl) = bitfield;
8490 if (storage_class == sc_mutable)
8492 DECL_MUTABLE_P (decl) = 1;
8493 storage_class = sc_none;
8497 bad_specifiers (decl, "field", virtualp,
8498 memfn_quals != TYPE_UNQUALIFIED,
8499 inlinep, friendp, raises != NULL_TREE);
8502 else if (TREE_CODE (type) == FUNCTION_TYPE
8503 || TREE_CODE (type) == METHOD_TYPE)
8508 if (!unqualified_id)
8509 return error_mark_node;
8511 if (TREE_CODE (unqualified_id) == TEMPLATE_ID_EXPR)
8512 original_name = dname;
8514 original_name = unqualified_id;
8516 if (storage_class == sc_auto)
8517 error ("storage class %<auto%> invalid for function %qs", name);
8518 else if (storage_class == sc_register)
8519 error ("storage class %<register%> invalid for function %qs", name);
8521 error ("storage class %<__thread%> invalid for function %qs", name);
8523 /* Function declaration not at top level.
8524 Storage classes other than `extern' are not allowed
8525 and `extern' makes no difference. */
8526 if (! toplevel_bindings_p ()
8527 && (storage_class == sc_static
8528 || declspecs->specs[(int)ds_inline])
8531 if (storage_class == sc_static)
8532 pedwarn ("%<static%> specified invalid for function %qs "
8533 "declared out of global scope", name);
8535 pedwarn ("%<inline%> specifier invalid for function %qs "
8536 "declared out of global scope", name);
8539 if (ctype == NULL_TREE)
8543 error ("virtual non-class function %qs", name);
8547 else if (TREE_CODE (type) == FUNCTION_TYPE && staticp < 2
8548 && !NEW_DELETE_OPNAME_P (original_name))
8549 type = build_method_type_directly (ctype,
8551 TYPE_ARG_TYPES (type));
8553 /* Record presence of `static'. */
8554 publicp = (ctype != NULL_TREE
8555 || storage_class == sc_extern
8556 || storage_class != sc_static);
8558 decl = grokfndecl (ctype, type, original_name, parms, unqualified_id,
8559 virtualp, flags, memfn_quals, raises,
8561 publicp, inlinep, sfk, funcdef_flag,
8562 template_count, in_namespace, attrlist);
8563 if (decl == NULL_TREE)
8564 return error_mark_node;
8568 int invalid_static = 0;
8570 /* Don't allow a static member function in a class, and forbid
8571 declaring main to be static. */
8572 if (TREE_CODE (type) == METHOD_TYPE)
8574 pedwarn ("cannot declare member function %qD to have "
8575 "static linkage", decl);
8578 else if (current_function_decl)
8580 /* FIXME need arm citation */
8581 error ("cannot declare static function inside another function");
8588 storage_class = sc_none;
8594 /* It's a variable. */
8596 /* An uninitialized decl with `extern' is a reference. */
8597 decl = grokvardecl (type, unqualified_id,
8600 (type_quals & TYPE_QUAL_CONST) != 0,
8601 ctype ? ctype : in_namespace);
8602 bad_specifiers (decl, "variable", virtualp,
8603 memfn_quals != TYPE_UNQUALIFIED,
8604 inlinep, friendp, raises != NULL_TREE);
8608 DECL_CONTEXT (decl) = ctype;
8611 pedwarn ("%<static%> may not be used when defining "
8612 "(as opposed to declaring) a static data member");
8614 storage_class = sc_none;
8616 if (storage_class == sc_register && TREE_STATIC (decl))
8618 error ("static member %qD declared %<register%>", decl);
8619 storage_class = sc_none;
8621 if (storage_class == sc_extern && pedantic)
8623 pedwarn ("cannot explicitly declare member %q#D to have "
8626 storage_class = sc_none;
8631 /* Record `register' declaration for warnings on &
8632 and in case doing stupid register allocation. */
8634 if (storage_class == sc_register)
8635 DECL_REGISTER (decl) = 1;
8636 else if (storage_class == sc_extern)
8637 DECL_THIS_EXTERN (decl) = 1;
8638 else if (storage_class == sc_static)
8639 DECL_THIS_STATIC (decl) = 1;
8641 /* Record constancy and volatility. There's no need to do this
8642 when processing a template; we'll do this for the instantiated
8643 declaration based on the type of DECL. */
8644 if (!processing_template_decl)
8645 cp_apply_type_quals_to_decl (type_quals, decl);
8651 /* Subroutine of start_function. Ensure that each of the parameter
8652 types (as listed in PARMS) is complete, as is required for a
8653 function definition. */
8656 require_complete_types_for_parms (tree parms)
8658 for (; parms; parms = TREE_CHAIN (parms))
8660 if (dependent_type_p (TREE_TYPE (parms)))
8662 if (!VOID_TYPE_P (TREE_TYPE (parms))
8663 && complete_type_or_else (TREE_TYPE (parms), parms))
8665 relayout_decl (parms);
8666 DECL_ARG_TYPE (parms) = type_passed_as (TREE_TYPE (parms));
8669 /* grokparms or complete_type_or_else will have already issued
8671 TREE_TYPE (parms) = error_mark_node;
8675 /* Returns nonzero if T is a local variable. */
8678 local_variable_p (tree t)
8680 if ((TREE_CODE (t) == VAR_DECL
8681 /* A VAR_DECL with a context that is a _TYPE is a static data
8683 && !TYPE_P (CP_DECL_CONTEXT (t))
8684 /* Any other non-local variable must be at namespace scope. */
8685 && !DECL_NAMESPACE_SCOPE_P (t))
8686 || (TREE_CODE (t) == PARM_DECL))
8692 /* Returns nonzero if T is an automatic local variable or a label.
8693 (These are the declarations that need to be remapped when the code
8694 containing them is duplicated.) */
8697 nonstatic_local_decl_p (tree t)
8699 return ((local_variable_p (t) && !TREE_STATIC (t))
8700 || TREE_CODE (t) == LABEL_DECL
8701 || TREE_CODE (t) == RESULT_DECL);
8704 /* Like local_variable_p, but suitable for use as a tree-walking
8708 local_variable_p_walkfn (tree *tp, int *walk_subtrees,
8709 void *data ATTRIBUTE_UNUSED)
8711 if (local_variable_p (*tp) && !DECL_ARTIFICIAL (*tp))
8713 else if (TYPE_P (*tp))
8720 /* Check that ARG, which is a default-argument expression for a
8721 parameter DECL, is valid. Returns ARG, or ERROR_MARK_NODE, if
8722 something goes wrong. DECL may also be a _TYPE node, rather than a
8723 DECL, if there is no DECL available. */
8726 check_default_argument (tree decl, tree arg)
8731 if (TREE_CODE (arg) == DEFAULT_ARG)
8732 /* We get a DEFAULT_ARG when looking at an in-class declaration
8733 with a default argument. Ignore the argument for now; we'll
8734 deal with it after the class is complete. */
8743 decl_type = TREE_TYPE (decl);
8745 if (arg == error_mark_node
8746 || decl == error_mark_node
8747 || TREE_TYPE (arg) == error_mark_node
8748 || decl_type == error_mark_node)
8749 /* Something already went wrong. There's no need to check
8751 return error_mark_node;
8753 /* [dcl.fct.default]
8755 A default argument expression is implicitly converted to the
8757 if (!TREE_TYPE (arg)
8758 || !can_convert_arg (decl_type, TREE_TYPE (arg), arg, LOOKUP_NORMAL))
8761 error ("default argument for %q#D has type %qT",
8762 decl, TREE_TYPE (arg));
8764 error ("default argument for parameter of type %qT has type %qT",
8765 decl_type, TREE_TYPE (arg));
8767 return error_mark_node;
8770 /* [dcl.fct.default]
8772 Local variables shall not be used in default argument
8775 The keyword `this' shall not be used in a default argument of a
8777 var = walk_tree_without_duplicates (&arg, local_variable_p_walkfn,
8781 error ("default argument %qE uses local variable %qD", arg, var);
8782 return error_mark_node;
8789 /* Decode the list of parameter types for a function type.
8790 Given the list of things declared inside the parens,
8791 return a list of types.
8793 If this parameter does not end with an ellipsis, we append
8796 *PARMS is set to the chain of PARM_DECLs created. */
8799 grokparms (cp_parameter_declarator *first_parm, tree *parms)
8801 tree result = NULL_TREE;
8802 tree decls = NULL_TREE;
8803 int ellipsis = !first_parm || first_parm->ellipsis_p;
8804 cp_parameter_declarator *parm;
8807 for (parm = first_parm; parm != NULL; parm = parm->next)
8809 tree type = NULL_TREE;
8810 tree init = parm->default_argument;
8814 if (parm == no_parameters)
8817 attrs = parm->decl_specifiers.attributes;
8818 parm->decl_specifiers.attributes = NULL_TREE;
8819 decl = grokdeclarator (parm->declarator, &parm->decl_specifiers,
8820 PARM, init != NULL_TREE, &attrs);
8821 if (! decl || TREE_TYPE (decl) == error_mark_node)
8825 cplus_decl_attributes (&decl, attrs, 0);
8827 type = TREE_TYPE (decl);
8828 if (VOID_TYPE_P (type))
8830 if (same_type_p (type, void_type_node)
8831 && DECL_SELF_REFERENCE_P (type)
8832 && !DECL_NAME (decl) && !result && !parm->next && !ellipsis)
8833 /* this is a parmlist of `(void)', which is ok. */
8835 cxx_incomplete_type_error (decl, type);
8836 /* It's not a good idea to actually create parameters of
8837 type `void'; other parts of the compiler assume that a
8838 void type terminates the parameter list. */
8839 type = error_mark_node;
8840 TREE_TYPE (decl) = error_mark_node;
8843 if (type != error_mark_node)
8845 /* Top-level qualifiers on the parameters are
8846 ignored for function types. */
8847 type = cp_build_qualified_type (type, 0);
8848 if (TREE_CODE (type) == METHOD_TYPE)
8850 error ("parameter %qD invalidly declared method type", decl);
8851 type = build_pointer_type (type);
8852 TREE_TYPE (decl) = type;
8854 else if (abstract_virtuals_error (decl, type))
8855 any_error = 1; /* Seems like a good idea. */
8856 else if (POINTER_TYPE_P (type))
8858 /* [dcl.fct]/6, parameter types cannot contain pointers
8859 (references) to arrays of unknown bound. */
8860 tree t = TREE_TYPE (type);
8861 int ptr = TYPE_PTR_P (type);
8867 else if (TREE_CODE (t) != ARRAY_TYPE)
8869 else if (!TYPE_DOMAIN (t))
8873 if (TREE_CODE (t) == ARRAY_TYPE)
8874 error ("parameter %qD includes %s to array of unknown "
8876 decl, ptr ? "pointer" : "reference", t);
8881 else if (init && !processing_template_decl)
8882 init = check_default_argument (decl, init);
8885 TREE_CHAIN (decl) = decls;
8887 result = tree_cons (init, type, result);
8889 decls = nreverse (decls);
8890 result = nreverse (result);
8892 result = chainon (result, void_list_node);
8899 /* D is a constructor or overloaded `operator='.
8901 Let T be the class in which D is declared. Then, this function
8904 -1 if D's is an ill-formed constructor or copy assignment operator
8905 whose first parameter is of type `T'.
8906 0 if D is not a copy constructor or copy assignment
8908 1 if D is a copy constructor or copy assignment operator whose
8909 first parameter is a reference to const qualified T.
8910 2 if D is a copy constructor or copy assignment operator whose
8911 first parameter is a reference to non-const qualified T.
8913 This function can be used as a predicate. Positive values indicate
8914 a copy constructor and nonzero values indicate a copy assignment
8924 gcc_assert (DECL_FUNCTION_MEMBER_P (d));
8926 if (TREE_CODE (d) == TEMPLATE_DECL
8927 || (DECL_TEMPLATE_INFO (d)
8928 && DECL_MEMBER_TEMPLATE_P (DECL_TI_TEMPLATE (d))))
8929 /* Instantiations of template member functions are never copy
8930 functions. Note that member functions of templated classes are
8931 represented as template functions internally, and we must
8932 accept those as copy functions. */
8935 args = FUNCTION_FIRST_USER_PARMTYPE (d);
8939 arg_type = TREE_VALUE (args);
8940 if (arg_type == error_mark_node)
8943 if (TYPE_MAIN_VARIANT (arg_type) == DECL_CONTEXT (d))
8945 /* Pass by value copy assignment operator. */
8948 else if (TREE_CODE (arg_type) == REFERENCE_TYPE
8949 && TYPE_MAIN_VARIANT (TREE_TYPE (arg_type)) == DECL_CONTEXT (d))
8951 if (CP_TYPE_CONST_P (TREE_TYPE (arg_type)))
8957 args = TREE_CHAIN (args);
8959 if (args && args != void_list_node && !TREE_PURPOSE (args))
8960 /* There are more non-optional args. */
8966 /* Remember any special properties of member function DECL. */
8968 void grok_special_member_properties (tree decl)
8972 if (!DECL_NONSTATIC_MEMBER_FUNCTION_P (decl))
8975 class_type = DECL_CONTEXT (decl);
8976 if (DECL_CONSTRUCTOR_P (decl))
8978 int ctor = copy_fn_p (decl);
8980 TYPE_HAS_CONSTRUCTOR (class_type) = 1;
8986 A non-template constructor for class X is a copy
8987 constructor if its first parameter is of type X&, const
8988 X&, volatile X& or const volatile X&, and either there
8989 are no other parameters or else all other parameters have
8990 default arguments. */
8991 TYPE_HAS_INIT_REF (class_type) = 1;
8993 TYPE_HAS_CONST_INIT_REF (class_type) = 1;
8995 else if (sufficient_parms_p (FUNCTION_FIRST_USER_PARMTYPE (decl)))
8996 TYPE_HAS_DEFAULT_CONSTRUCTOR (class_type) = 1;
8998 else if (DECL_OVERLOADED_OPERATOR_P (decl) == NOP_EXPR)
9002 A non-template assignment operator for class X is a copy
9003 assignment operator if its parameter is of type X, X&, const
9004 X&, volatile X& or const volatile X&. */
9006 int assop = copy_fn_p (decl);
9010 TYPE_HAS_ASSIGN_REF (class_type) = 1;
9012 TYPE_HAS_CONST_ASSIGN_REF (class_type) = 1;
9017 /* Check a constructor DECL has the correct form. Complains
9018 if the class has a constructor of the form X(X). */
9021 grok_ctor_properties (tree ctype, tree decl)
9023 int ctor_parm = copy_fn_p (decl);
9029 A declaration of a constructor for a class X is ill-formed if
9030 its first parameter is of type (optionally cv-qualified) X
9031 and either there are no other parameters or else all other
9032 parameters have default arguments.
9034 We *don't* complain about member template instantiations that
9035 have this form, though; they can occur as we try to decide
9036 what constructor to use during overload resolution. Since
9037 overload resolution will never prefer such a constructor to
9038 the non-template copy constructor (which is either explicitly
9039 or implicitly defined), there's no need to worry about their
9040 existence. Theoretically, they should never even be
9041 instantiated, but that's hard to forestall. */
9042 error ("invalid constructor; you probably meant %<%T (const %T&)%>",
9050 /* An operator with this code is unary, but can also be binary. */
9053 ambi_op_p (enum tree_code code)
9055 return (code == INDIRECT_REF
9056 || code == ADDR_EXPR
9057 || code == UNARY_PLUS_EXPR
9058 || code == NEGATE_EXPR
9059 || code == PREINCREMENT_EXPR
9060 || code == PREDECREMENT_EXPR);
9063 /* An operator with this name can only be unary. */
9066 unary_op_p (enum tree_code code)
9068 return (code == TRUTH_NOT_EXPR
9069 || code == BIT_NOT_EXPR
9070 || code == COMPONENT_REF
9071 || code == TYPE_EXPR);
9074 /* DECL is a declaration for an overloaded operator. If COMPLAIN is true,
9075 errors are issued for invalid declarations. */
9078 grok_op_properties (tree decl, bool complain)
9080 tree argtypes = TYPE_ARG_TYPES (TREE_TYPE (decl));
9082 int methodp = (TREE_CODE (TREE_TYPE (decl)) == METHOD_TYPE);
9083 tree name = DECL_NAME (decl);
9084 enum tree_code operator_code;
9089 /* Count the number of arguments and check for ellipsis. */
9090 for (argtype = argtypes, arity = 0;
9091 argtype && argtype != void_list_node;
9092 argtype = TREE_CHAIN (argtype))
9094 ellipsis_p = !argtype;
9096 class_type = DECL_CONTEXT (decl);
9097 if (class_type && !CLASS_TYPE_P (class_type))
9098 class_type = NULL_TREE;
9100 if (DECL_CONV_FN_P (decl))
9101 operator_code = TYPE_EXPR;
9105 #define DEF_OPERATOR(NAME, CODE, MANGLING, ARITY, ASSN_P) \
9106 if (ansi_opname (CODE) == name) \
9108 operator_code = (CODE); \
9111 else if (ansi_assopname (CODE) == name) \
9113 operator_code = (CODE); \
9114 DECL_ASSIGNMENT_OPERATOR_P (decl) = 1; \
9118 #include "operators.def"
9124 gcc_assert (operator_code != LAST_CPLUS_TREE_CODE);
9125 SET_OVERLOADED_OPERATOR_CODE (decl, operator_code);
9128 switch (operator_code)
9131 TYPE_HAS_NEW_OPERATOR (class_type) = 1;
9135 TYPE_GETS_DELETE (class_type) |= 1;
9139 TYPE_HAS_ARRAY_NEW_OPERATOR (class_type) = 1;
9142 case VEC_DELETE_EXPR:
9143 TYPE_GETS_DELETE (class_type) |= 2;
9150 /* [basic.std.dynamic.allocation]/1:
9152 A program is ill-formed if an allocation function is declared
9153 in a namespace scope other than global scope or declared static
9156 The same also holds true for deallocation functions. */
9157 if (operator_code == NEW_EXPR || operator_code == VEC_NEW_EXPR
9158 || operator_code == DELETE_EXPR || operator_code == VEC_DELETE_EXPR)
9160 if (DECL_NAMESPACE_SCOPE_P (decl))
9162 if (CP_DECL_CONTEXT (decl) != global_namespace)
9164 error ("%qD may not be declared within a namespace", decl);
9167 else if (!TREE_PUBLIC (decl))
9169 error ("%qD may not be declared as static", decl);
9175 if (operator_code == NEW_EXPR || operator_code == VEC_NEW_EXPR)
9176 TREE_TYPE (decl) = coerce_new_type (TREE_TYPE (decl));
9177 else if (operator_code == DELETE_EXPR || operator_code == VEC_DELETE_EXPR)
9178 TREE_TYPE (decl) = coerce_delete_type (TREE_TYPE (decl));
9181 /* An operator function must either be a non-static member function
9182 or have at least one parameter of a class, a reference to a class,
9183 an enumeration, or a reference to an enumeration. 13.4.0.6 */
9184 if (! methodp || DECL_STATIC_FUNCTION_P (decl))
9186 if (operator_code == TYPE_EXPR
9187 || operator_code == CALL_EXPR
9188 || operator_code == COMPONENT_REF
9189 || operator_code == ARRAY_REF
9190 || operator_code == NOP_EXPR)
9192 error ("%qD must be a nonstatic member function", decl);
9199 if (DECL_STATIC_FUNCTION_P (decl))
9201 error ("%qD must be either a non-static member "
9202 "function or a non-member function", decl);
9206 for (p = argtypes; p && p != void_list_node; p = TREE_CHAIN (p))
9208 tree arg = non_reference (TREE_VALUE (p));
9209 if (arg == error_mark_node)
9212 /* IS_AGGR_TYPE, rather than CLASS_TYPE_P, is used
9213 because these checks are performed even on
9214 template functions. */
9215 if (IS_AGGR_TYPE (arg) || TREE_CODE (arg) == ENUMERAL_TYPE)
9219 if (!p || p == void_list_node)
9222 error ("%qD must have an argument of class or "
9223 "enumerated type", decl);
9229 /* There are no restrictions on the arguments to an overloaded
9231 if (operator_code == CALL_EXPR)
9234 /* Warn about conversion operators that will never be used. */
9235 if (IDENTIFIER_TYPENAME_P (name)
9236 && ! DECL_TEMPLATE_INFO (decl)
9238 /* Warn only declaring the function; there is no need to
9239 warn again about out-of-class definitions. */
9240 && class_type == current_class_type)
9242 tree t = TREE_TYPE (name);
9243 int ref = (TREE_CODE (t) == REFERENCE_TYPE);
9244 const char *what = 0;
9247 t = TYPE_MAIN_VARIANT (TREE_TYPE (t));
9249 if (TREE_CODE (t) == VOID_TYPE)
9251 else if (class_type)
9253 if (t == class_type)
9254 what = "the same type";
9255 /* Don't force t to be complete here. */
9256 else if (IS_AGGR_TYPE (t)
9257 && COMPLETE_TYPE_P (t)
9258 && DERIVED_FROM_P (t, class_type))
9259 what = "a base class";
9263 warning (OPT_Wconversion, "conversion to %s%s will never use a type "
9264 "conversion operator",
9265 ref ? "a reference to " : "", what);
9268 if (operator_code == COND_EXPR)
9271 error ("ISO C++ prohibits overloading operator ?:");
9274 else if (ellipsis_p)
9276 error ("%qD must not have variable number of arguments", decl);
9279 else if (ambi_op_p (operator_code))
9282 /* We pick the one-argument operator codes by default, so
9283 we don't have to change anything. */
9285 else if (arity == 2)
9287 /* If we thought this was a unary operator, we now know
9288 it to be a binary operator. */
9289 switch (operator_code)
9292 operator_code = MULT_EXPR;
9296 operator_code = BIT_AND_EXPR;
9299 case UNARY_PLUS_EXPR:
9300 operator_code = PLUS_EXPR;
9304 operator_code = MINUS_EXPR;
9307 case PREINCREMENT_EXPR:
9308 operator_code = POSTINCREMENT_EXPR;
9311 case PREDECREMENT_EXPR:
9312 operator_code = POSTDECREMENT_EXPR;
9319 SET_OVERLOADED_OPERATOR_CODE (decl, operator_code);
9321 if ((operator_code == POSTINCREMENT_EXPR
9322 || operator_code == POSTDECREMENT_EXPR)
9323 && ! processing_template_decl
9324 && ! same_type_p (TREE_VALUE (TREE_CHAIN (argtypes)), integer_type_node))
9327 error ("postfix %qD must take %<int%> as its argument",
9330 error ("postfix %qD must take %<int%> as its second "
9338 error ("%qD must take either zero or one argument", decl);
9340 error ("%qD must take either one or two arguments", decl);
9344 /* More Effective C++ rule 6. */
9346 && (operator_code == POSTINCREMENT_EXPR
9347 || operator_code == POSTDECREMENT_EXPR
9348 || operator_code == PREINCREMENT_EXPR
9349 || operator_code == PREDECREMENT_EXPR))
9351 tree arg = TREE_VALUE (argtypes);
9352 tree ret = TREE_TYPE (TREE_TYPE (decl));
9353 if (methodp || TREE_CODE (arg) == REFERENCE_TYPE)
9354 arg = TREE_TYPE (arg);
9355 arg = TYPE_MAIN_VARIANT (arg);
9356 if (operator_code == PREINCREMENT_EXPR
9357 || operator_code == PREDECREMENT_EXPR)
9359 if (TREE_CODE (ret) != REFERENCE_TYPE
9360 || !same_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (ret)),
9362 warning (OPT_Weffc__, "prefix %qD should return %qT", decl,
9363 build_reference_type (arg));
9367 if (!same_type_p (TYPE_MAIN_VARIANT (ret), arg))
9368 warning (OPT_Weffc__, "postfix %qD should return %qT", decl, arg);
9372 else if (unary_op_p (operator_code))
9377 error ("%qD must take %<void%>", decl);
9379 error ("%qD must take exactly one argument", decl);
9383 else /* if (binary_op_p (operator_code)) */
9388 error ("%qD must take exactly one argument", decl);
9390 error ("%qD must take exactly two arguments", decl);
9394 /* More Effective C++ rule 7. */
9396 && (operator_code == TRUTH_ANDIF_EXPR
9397 || operator_code == TRUTH_ORIF_EXPR
9398 || operator_code == COMPOUND_EXPR))
9399 warning (OPT_Weffc__, "user-defined %qD always evaluates both arguments",
9403 /* Effective C++ rule 23. */
9406 && !DECL_ASSIGNMENT_OPERATOR_P (decl)
9407 && (operator_code == PLUS_EXPR
9408 || operator_code == MINUS_EXPR
9409 || operator_code == TRUNC_DIV_EXPR
9410 || operator_code == MULT_EXPR
9411 || operator_code == TRUNC_MOD_EXPR)
9412 && TREE_CODE (TREE_TYPE (TREE_TYPE (decl))) == REFERENCE_TYPE)
9413 warning (OPT_Weffc__, "%qD should return by value", decl);
9416 for (; argtypes && argtypes != void_list_node;
9417 argtypes = TREE_CHAIN (argtypes))
9418 if (TREE_PURPOSE (argtypes))
9420 TREE_PURPOSE (argtypes) = NULL_TREE;
9421 if (operator_code == POSTINCREMENT_EXPR
9422 || operator_code == POSTDECREMENT_EXPR)
9425 pedwarn ("%qD cannot have default arguments", decl);
9429 error ("%qD cannot have default arguments", decl);
9437 /* Return a string giving the keyword associate with CODE. */
9440 tag_name (enum tag_types code)
9459 /* Name lookup in an elaborated-type-specifier (after the keyword
9460 indicated by TAG_CODE) has found the TYPE_DECL DECL. If the
9461 elaborated-type-specifier is invalid, issue a diagnostic and return
9462 error_mark_node; otherwise, return the *_TYPE to which it referred.
9463 If ALLOW_TEMPLATE_P is true, TYPE may be a class template. */
9466 check_elaborated_type_specifier (enum tag_types tag_code,
9468 bool allow_template_p)
9474 struct S { struct S *p; };
9476 name lookup will find the TYPE_DECL for the implicit "S::S"
9477 typedef. Adjust for that here. */
9478 if (DECL_SELF_REFERENCE_P (decl))
9479 decl = TYPE_NAME (TREE_TYPE (decl));
9481 type = TREE_TYPE (decl);
9483 /* Check TEMPLATE_TYPE_PARM first because DECL_IMPLICIT_TYPEDEF_P
9484 is false for this case as well. */
9485 if (TREE_CODE (type) == TEMPLATE_TYPE_PARM)
9487 error ("using template type parameter %qT after %qs",
9488 type, tag_name (tag_code));
9489 return error_mark_node;
9493 If the identifier resolves to a typedef-name or a template
9494 type-parameter, the elaborated-type-specifier is ill-formed.
9496 In other words, the only legitimate declaration to use in the
9497 elaborated type specifier is the implicit typedef created when
9498 the type is declared. */
9499 else if (!DECL_IMPLICIT_TYPEDEF_P (decl)
9500 && tag_code != typename_type)
9502 error ("using typedef-name %qD after %qs", decl, tag_name (tag_code));
9503 error ("%q+D has a previous declaration here", decl);
9504 return error_mark_node;
9506 else if (TREE_CODE (type) != RECORD_TYPE
9507 && TREE_CODE (type) != UNION_TYPE
9508 && tag_code != enum_type
9509 && tag_code != typename_type)
9511 error ("%qT referred to as %qs", type, tag_name (tag_code));
9512 error ("%q+T has a previous declaration here", type);
9513 return error_mark_node;
9515 else if (TREE_CODE (type) != ENUMERAL_TYPE
9516 && tag_code == enum_type)
9518 error ("%qT referred to as enum", type);
9519 error ("%q+T has a previous declaration here", type);
9520 return error_mark_node;
9522 else if (!allow_template_p
9523 && TREE_CODE (type) == RECORD_TYPE
9524 && CLASSTYPE_IS_TEMPLATE (type))
9526 /* If a class template appears as elaborated type specifier
9527 without a template header such as:
9529 template <class T> class C {};
9530 void f(class C); // No template header here
9532 then the required template argument is missing. */
9533 error ("template argument required for %<%s %T%>",
9534 tag_name (tag_code),
9535 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type)));
9536 return error_mark_node;
9542 /* Lookup NAME in elaborate type specifier in scope according to
9543 SCOPE and issue diagnostics if necessary.
9544 Return *_TYPE node upon success, NULL_TREE when the NAME is not
9545 found, and ERROR_MARK_NODE for type error. */
9548 lookup_and_check_tag (enum tag_types tag_code, tree name,
9549 tag_scope scope, bool template_header_p)
9553 if (scope == ts_global)
9555 /* First try ordinary name lookup, ignoring hidden class name
9556 injected via friend declaration. */
9557 decl = lookup_name_prefer_type (name, 2);
9558 /* If that fails, the name will be placed in the smallest
9559 non-class, non-function-prototype scope according to 3.3.1/5.
9560 We may already have a hidden name declared as friend in this
9561 scope. So lookup again but not ignoring hidden names.
9562 If we find one, that name will be made visible rather than
9563 creating a new tag. */
9565 decl = lookup_type_scope (name, ts_within_enclosing_non_class);
9568 decl = lookup_type_scope (name, scope);
9570 if (decl && DECL_CLASS_TEMPLATE_P (decl))
9571 decl = DECL_TEMPLATE_RESULT (decl);
9573 if (decl && TREE_CODE (decl) == TYPE_DECL)
9575 /* Look for invalid nested type:
9579 if (scope == ts_current && DECL_SELF_REFERENCE_P (decl))
9581 error ("%qD has the same name as the class in which it is "
9584 return error_mark_node;
9587 /* Two cases we need to consider when deciding if a class
9588 template is allowed as an elaborated type specifier:
9589 1. It is a self reference to its own class.
9590 2. It comes with a template header.
9594 template <class T> class C {
9595 class C *c1; // DECL_SELF_REFERENCE_P is true
9598 template <class U> class C; // template_header_p is true
9599 template <class T> class C<T>::D {
9600 class C *c2; // DECL_SELF_REFERENCE_P is true
9603 t = check_elaborated_type_specifier (tag_code,
9606 | DECL_SELF_REFERENCE_P (decl));
9613 /* Get the struct, enum or union (TAG_CODE says which) with tag NAME.
9614 Define the tag as a forward-reference if it is not defined.
9616 If a declaration is given, process it here, and report an error if
9617 multiple declarations are not identical.
9619 SCOPE is TS_CURRENT when this is also a definition. Only look in
9620 the current frame for the name (since C++ allows new names in any
9621 scope.) It is TS_WITHIN_ENCLOSING_NON_CLASS if this is a friend
9622 declaration. Only look beginning from the current scope outward up
9623 till the nearest non-class scope. Otherwise it is TS_GLOBAL.
9625 TEMPLATE_HEADER_P is true when this declaration is preceded by
9626 a set of template parameters. */
9629 xref_tag (enum tag_types tag_code, tree name,
9630 tag_scope scope, bool template_header_p)
9632 enum tree_code code;
9634 tree context = NULL_TREE;
9636 timevar_push (TV_NAME_LOOKUP);
9638 gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE);
9650 code = ENUMERAL_TYPE;
9656 /* In case of anonymous name, xref_tag is only called to
9657 make type node and push name. Name lookup is not required. */
9658 if (ANON_AGGRNAME_P (name))
9661 t = lookup_and_check_tag (tag_code, name,
9662 scope, template_header_p);
9664 if (t == error_mark_node)
9665 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
9667 if (scope != ts_current && t && current_class_type
9668 && template_class_depth (current_class_type)
9669 && template_header_p)
9671 /* Since SCOPE is not TS_CURRENT, we are not looking at a
9672 definition of this tag. Since, in addition, we are currently
9673 processing a (member) template declaration of a template
9674 class, we must be very careful; consider:
9681 { template <class V>
9682 friend struct S1; };
9684 Here, the S2::S1 declaration should not be confused with the
9685 outer declaration. In particular, the inner version should
9686 have a template parameter of level 2, not level 1. This
9687 would be particularly important if the member declaration
9690 template <class V = U> friend struct S1;
9692 say, when we should tsubst into `U' when instantiating
9693 S2. On the other hand, when presented with:
9703 we must find the inner binding eventually. We
9704 accomplish this by making sure that the new type we
9705 create to represent this declaration has the right
9707 context = TYPE_CONTEXT (t);
9713 /* If no such tag is yet defined, create a forward-reference node
9714 and record it as the "definition".
9715 When a real declaration of this type is found,
9716 the forward-reference will be altered into a real type. */
9717 if (code == ENUMERAL_TYPE)
9719 error ("use of enum %q#D without previous declaration", name);
9720 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
9724 t = make_aggr_type (code);
9725 TYPE_CONTEXT (t) = context;
9726 t = pushtag (name, t, scope);
9731 if (template_header_p && IS_AGGR_TYPE (t))
9733 if (!redeclare_class_template (t, current_template_parms))
9734 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
9736 else if (!processing_template_decl
9738 && CLASSTYPE_IS_TEMPLATE (t))
9740 error ("redeclaration of %qT as a non-template", t);
9741 error ("previous declaration %q+D", t);
9742 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
9745 /* Make injected friend class visible. */
9746 if (scope != ts_within_enclosing_non_class
9747 && hidden_name_p (TYPE_NAME (t)))
9749 DECL_ANTICIPATED (TYPE_NAME (t)) = 0;
9750 DECL_FRIEND_P (TYPE_NAME (t)) = 0;
9752 if (TYPE_TEMPLATE_INFO (t))
9754 DECL_ANTICIPATED (TYPE_TI_TEMPLATE (t)) = 0;
9755 DECL_FRIEND_P (TYPE_TI_TEMPLATE (t)) = 0;
9760 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, t);
9764 xref_tag_from_type (tree old, tree id, tag_scope scope)
9766 enum tag_types tag_kind;
9768 if (TREE_CODE (old) == RECORD_TYPE)
9769 tag_kind = (CLASSTYPE_DECLARED_CLASS (old) ? class_type : record_type);
9771 tag_kind = union_type;
9773 if (id == NULL_TREE)
9774 id = TYPE_IDENTIFIER (old);
9776 return xref_tag (tag_kind, id, scope, false);
9779 /* Create the binfo hierarchy for REF with (possibly NULL) base list
9780 BASE_LIST. For each element on BASE_LIST the TREE_PURPOSE is an
9781 access_* node, and the TREE_VALUE is the type of the base-class.
9782 Non-NULL TREE_TYPE indicates virtual inheritance. */
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)
9848 error ("derived union %qT invalid", ref);
9853 if (TYPE_FOR_JAVA (ref))
9854 error ("Java class %qT cannot have multiple bases", ref);
9859 CLASSTYPE_VBASECLASSES (ref) = VEC_alloc (tree, gc, max_vbases);
9861 if (TYPE_FOR_JAVA (ref))
9862 error ("Java class %qT cannot have virtual bases", ref);
9865 for (igo_prev = binfo; base_list; base_list = TREE_CHAIN (base_list))
9867 tree access = TREE_PURPOSE (base_list);
9868 int via_virtual = TREE_TYPE (base_list) != NULL_TREE;
9869 tree basetype = TREE_VALUE (base_list);
9871 if (access == access_default_node)
9872 access = default_access;
9874 if (TREE_CODE (basetype) == TYPE_DECL)
9875 basetype = TREE_TYPE (basetype);
9876 if (TREE_CODE (basetype) != RECORD_TYPE
9877 && TREE_CODE (basetype) != TYPENAME_TYPE
9878 && TREE_CODE (basetype) != TEMPLATE_TYPE_PARM
9879 && TREE_CODE (basetype) != BOUND_TEMPLATE_TEMPLATE_PARM)
9881 error ("base type %qT fails to be a struct or class type",
9886 if (TYPE_FOR_JAVA (basetype) && (current_lang_depth () == 0))
9887 TYPE_FOR_JAVA (ref) = 1;
9889 base_binfo = NULL_TREE;
9890 if (CLASS_TYPE_P (basetype) && !dependent_type_p (basetype))
9892 base_binfo = TYPE_BINFO (basetype);
9893 /* The original basetype could have been a typedef'd type. */
9894 basetype = BINFO_TYPE (base_binfo);
9896 /* Inherit flags from the base. */
9897 TYPE_HAS_NEW_OPERATOR (ref)
9898 |= TYPE_HAS_NEW_OPERATOR (basetype);
9899 TYPE_HAS_ARRAY_NEW_OPERATOR (ref)
9900 |= TYPE_HAS_ARRAY_NEW_OPERATOR (basetype);
9901 TYPE_GETS_DELETE (ref) |= TYPE_GETS_DELETE (basetype);
9902 TYPE_HAS_CONVERSION (ref) |= TYPE_HAS_CONVERSION (basetype);
9903 CLASSTYPE_DIAMOND_SHAPED_P (ref)
9904 |= CLASSTYPE_DIAMOND_SHAPED_P (basetype);
9905 CLASSTYPE_REPEATED_BASE_P (ref)
9906 |= CLASSTYPE_REPEATED_BASE_P (basetype);
9909 /* We must do this test after we've seen through a typedef
9911 if (TYPE_MARKED_P (basetype))
9913 if (basetype == ref)
9914 error ("recursive type %qT undefined", basetype);
9916 error ("duplicate base type %qT invalid", basetype);
9919 TYPE_MARKED_P (basetype) = 1;
9921 base_binfo = copy_binfo (base_binfo, basetype, ref,
9922 &igo_prev, via_virtual);
9923 if (!BINFO_INHERITANCE_CHAIN (base_binfo))
9924 BINFO_INHERITANCE_CHAIN (base_binfo) = binfo;
9926 BINFO_BASE_APPEND (binfo, base_binfo);
9927 BINFO_BASE_ACCESS_APPEND (binfo, access);
9930 if (VEC_space (tree, CLASSTYPE_VBASECLASSES (ref), 1))
9931 /* If we have space in the vbase vector, we must have shared at
9932 least one of them, and are therefore diamond shaped. */
9933 CLASSTYPE_DIAMOND_SHAPED_P (ref) = 1;
9935 /* Unmark all the types. */
9936 for (i = 0; BINFO_BASE_ITERATE (binfo, i, base_binfo); i++)
9937 TYPE_MARKED_P (BINFO_TYPE (base_binfo)) = 0;
9938 TYPE_MARKED_P (ref) = 0;
9940 /* Now see if we have a repeated base type. */
9941 if (!CLASSTYPE_REPEATED_BASE_P (ref))
9943 for (base_binfo = binfo; base_binfo;
9944 base_binfo = TREE_CHAIN (base_binfo))
9946 if (TYPE_MARKED_P (BINFO_TYPE (base_binfo)))
9948 CLASSTYPE_REPEATED_BASE_P (ref) = 1;
9951 TYPE_MARKED_P (BINFO_TYPE (base_binfo)) = 1;
9953 for (base_binfo = binfo; base_binfo;
9954 base_binfo = TREE_CHAIN (base_binfo))
9955 if (TYPE_MARKED_P (BINFO_TYPE (base_binfo)))
9956 TYPE_MARKED_P (BINFO_TYPE (base_binfo)) = 0;
9963 /* Begin compiling the definition of an enumeration type.
9965 Returns the type object, as yet incomplete.
9966 Also records info about it so that build_enumerator
9967 may be used to declare the individual values as they are read. */
9970 start_enum (tree name)
9974 gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE);
9976 /* If this is the real definition for a previous forward reference,
9977 fill in the contents in the same object that used to be the
9978 forward reference. */
9980 enumtype = lookup_and_check_tag (enum_type, name,
9981 /*tag_scope=*/ts_current,
9982 /*template_header_p=*/false);
9984 if (enumtype != NULL_TREE && TREE_CODE (enumtype) == ENUMERAL_TYPE)
9986 error ("multiple definition of %q#T", enumtype);
9987 error ("%Jprevious definition here", TYPE_MAIN_DECL (enumtype));
9988 /* Clear out TYPE_VALUES, and start again. */
9989 TYPE_VALUES (enumtype) = NULL_TREE;
9993 /* In case of error, make a dummy enum to allow parsing to
9995 if (enumtype == error_mark_node)
9996 name = make_anon_name ();
9998 enumtype = make_node (ENUMERAL_TYPE);
9999 enumtype = pushtag (name, enumtype, /*tag_scope=*/ts_current);
10005 /* After processing and defining all the values of an enumeration type,
10006 install their decls in the enumeration type and finish it off.
10007 ENUMTYPE is the type object and VALUES a list of name-value pairs. */
10010 finish_enum (tree enumtype)
10019 bool use_short_enum;
10023 integer_type_kind itk;
10024 tree underlying_type = NULL_TREE;
10026 /* We built up the VALUES in reverse order. */
10027 TYPE_VALUES (enumtype) = nreverse (TYPE_VALUES (enumtype));
10029 /* For an enum defined in a template, just set the type of the values;
10030 all further processing is postponed until the template is
10031 instantiated. We need to set the type so that tsubst of a CONST_DECL
10033 if (processing_template_decl)
10035 for (values = TYPE_VALUES (enumtype);
10037 values = TREE_CHAIN (values))
10038 TREE_TYPE (TREE_VALUE (values)) = enumtype;
10039 if (at_function_scope_p ())
10040 add_stmt (build_min (TAG_DEFN, enumtype));
10044 /* Determine the minimum and maximum values of the enumerators. */
10045 if (TYPE_VALUES (enumtype))
10047 minnode = maxnode = NULL_TREE;
10049 for (values = TYPE_VALUES (enumtype);
10051 values = TREE_CHAIN (values))
10053 decl = TREE_VALUE (values);
10055 /* [dcl.enum]: Following the closing brace of an enum-specifier,
10056 each enumerator has the type of its enumeration. Prior to the
10057 closing brace, the type of each enumerator is the type of its
10058 initializing value. */
10059 TREE_TYPE (decl) = enumtype;
10061 /* Update the minimum and maximum values, if appropriate. */
10062 value = DECL_INITIAL (decl);
10063 if (value == error_mark_node)
10064 value = integer_zero_node;
10065 /* Figure out what the minimum and maximum values of the
10066 enumerators are. */
10068 minnode = maxnode = value;
10069 else if (tree_int_cst_lt (maxnode, value))
10071 else if (tree_int_cst_lt (value, minnode))
10078 If the enumerator-list is empty, the underlying type is as if
10079 the enumeration had a single enumerator with value 0. */
10080 minnode = maxnode = integer_zero_node;
10082 /* Compute the number of bits require to represent all values of the
10083 enumeration. We must do this before the type of MINNODE and
10084 MAXNODE are transformed, since min_precision relies on the
10085 TREE_TYPE of the value it is passed. */
10086 unsignedp = tree_int_cst_sgn (minnode) >= 0;
10087 lowprec = min_precision (minnode, unsignedp);
10088 highprec = min_precision (maxnode, unsignedp);
10089 precision = MAX (lowprec, highprec);
10091 /* Determine the underlying type of the enumeration.
10095 The underlying type of an enumeration is an integral type that
10096 can represent all the enumerator values defined in the
10097 enumeration. It is implementation-defined which integral type is
10098 used as the underlying type for an enumeration except that the
10099 underlying type shall not be larger than int unless the value of
10100 an enumerator cannot fit in an int or unsigned int.
10102 We use "int" or an "unsigned int" as the underlying type, even if
10103 a smaller integral type would work, unless the user has
10104 explicitly requested that we use the smallest possible type. The
10105 user can request that for all enumerations with a command line
10106 flag, or for just one enumeration with an attribute. */
10108 use_short_enum = flag_short_enums
10109 || lookup_attribute ("packed", TYPE_ATTRIBUTES (enumtype));
10111 for (itk = (use_short_enum ? itk_char : itk_int);
10115 underlying_type = integer_types[itk];
10116 if (TYPE_PRECISION (underlying_type) >= precision
10117 && TYPE_UNSIGNED (underlying_type) == unsignedp)
10120 if (itk == itk_none)
10124 IF no integral type can represent all the enumerator values, the
10125 enumeration is ill-formed. */
10126 error ("no integral type can represent all of the enumerator values "
10127 "for %qT", enumtype);
10128 precision = TYPE_PRECISION (long_long_integer_type_node);
10129 underlying_type = integer_types[itk_unsigned_long_long];
10132 /* Compute the minium and maximum values for the type.
10136 For an enumeration where emin is the smallest enumerator and emax
10137 is the largest, the values of the enumeration are the values of the
10138 underlying type in the range bmin to bmax, where bmin and bmax are,
10139 respectively, the smallest and largest values of the smallest bit-
10140 field that can store emin and emax. */
10142 /* The middle-end currently assumes that types with TYPE_PRECISION
10143 narrower than their underlying type are suitably zero or sign
10144 extended to fill their mode. g++ doesn't make these guarantees.
10145 Until the middle-end can represent such paradoxical types, we
10146 set the TYPE_PRECISION to the width of the underlying type. */
10147 TYPE_PRECISION (enumtype) = TYPE_PRECISION (underlying_type);
10149 set_min_and_max_values_for_integral_type (enumtype, precision, unsignedp);
10153 The value of sizeof() applied to an enumeration type, an object
10154 of an enumeration type, or an enumerator, is the value of sizeof()
10155 applied to the underlying type. */
10156 TYPE_SIZE (enumtype) = TYPE_SIZE (underlying_type);
10157 TYPE_SIZE_UNIT (enumtype) = TYPE_SIZE_UNIT (underlying_type);
10158 TYPE_MODE (enumtype) = TYPE_MODE (underlying_type);
10159 TYPE_ALIGN (enumtype) = TYPE_ALIGN (underlying_type);
10160 TYPE_USER_ALIGN (enumtype) = TYPE_USER_ALIGN (underlying_type);
10161 TYPE_UNSIGNED (enumtype) = TYPE_UNSIGNED (underlying_type);
10163 /* Convert each of the enumerators to the type of the underlying
10164 type of the enumeration. */
10165 for (values = TYPE_VALUES (enumtype); values; values = TREE_CHAIN (values))
10167 location_t saved_location;
10169 decl = TREE_VALUE (values);
10170 saved_location = input_location;
10171 input_location = DECL_SOURCE_LOCATION (decl);
10172 value = perform_implicit_conversion (underlying_type,
10173 DECL_INITIAL (decl));
10174 input_location = saved_location;
10176 /* Do not clobber shared ints. */
10177 value = copy_node (value);
10179 TREE_TYPE (value) = enumtype;
10180 DECL_INITIAL (decl) = value;
10181 TREE_VALUE (values) = value;
10184 /* Fix up all variant types of this enum type. */
10185 for (t = TYPE_MAIN_VARIANT (enumtype); t; t = TYPE_NEXT_VARIANT (t))
10187 TYPE_VALUES (t) = TYPE_VALUES (enumtype);
10188 TYPE_MIN_VALUE (t) = TYPE_MIN_VALUE (enumtype);
10189 TYPE_MAX_VALUE (t) = TYPE_MAX_VALUE (enumtype);
10190 TYPE_SIZE (t) = TYPE_SIZE (enumtype);
10191 TYPE_SIZE_UNIT (t) = TYPE_SIZE_UNIT (enumtype);
10192 TYPE_MODE (t) = TYPE_MODE (enumtype);
10193 TYPE_PRECISION (t) = TYPE_PRECISION (enumtype);
10194 TYPE_ALIGN (t) = TYPE_ALIGN (enumtype);
10195 TYPE_USER_ALIGN (t) = TYPE_USER_ALIGN (enumtype);
10196 TYPE_UNSIGNED (t) = TYPE_UNSIGNED (enumtype);
10199 /* Finish debugging output for this type. */
10200 rest_of_type_compilation (enumtype, namespace_bindings_p ());
10203 /* Build and install a CONST_DECL for an enumeration constant of the
10204 enumeration type ENUMTYPE whose NAME and VALUE (if any) are provided.
10205 Assignment of sequential values by default is handled here. */
10208 build_enumerator (tree name, tree value, tree enumtype)
10214 /* If the VALUE was erroneous, pretend it wasn't there; that will
10215 result in the enum being assigned the next value in sequence. */
10216 if (value == error_mark_node)
10219 /* Remove no-op casts from the value. */
10221 STRIP_TYPE_NOPS (value);
10223 if (! processing_template_decl)
10225 /* Validate and default VALUE. */
10226 if (value != NULL_TREE)
10228 value = integral_constant_value (value);
10230 if (TREE_CODE (value) == INTEGER_CST)
10232 value = perform_integral_promotions (value);
10233 constant_expression_warning (value);
10237 error ("enumerator value for %qD not integer constant", name);
10242 /* Default based on previous value. */
10243 if (value == NULL_TREE)
10245 if (TYPE_VALUES (enumtype))
10248 unsigned HOST_WIDE_INT lo;
10252 /* The next value is the previous value plus one. We can
10253 safely assume that the previous value is an INTEGER_CST.
10254 add_double doesn't know the type of the target expression,
10255 so we must check with int_fits_type_p as well. */
10256 prev_value = DECL_INITIAL (TREE_VALUE (TYPE_VALUES (enumtype)));
10257 overflowed = add_double (TREE_INT_CST_LOW (prev_value),
10258 TREE_INT_CST_HIGH (prev_value),
10260 value = build_int_cst_wide (TREE_TYPE (prev_value), lo, hi);
10261 overflowed |= !int_fits_type_p (value, TREE_TYPE (prev_value));
10265 error ("overflow in enumeration values at %qD", name);
10266 value = error_mark_node;
10270 value = integer_zero_node;
10273 /* Remove no-op casts from the value. */
10274 STRIP_TYPE_NOPS (value);
10277 /* C++ associates enums with global, function, or class declarations. */
10278 context = current_scope ();
10280 /* Build the actual enumeration constant. Note that the enumeration
10281 constants have the type of their initializers until the
10282 enumeration is complete:
10286 Following the closing brace of an enum-specifier, each enumer-
10287 ator has the type of its enumeration. Prior to the closing
10288 brace, the type of each enumerator is the type of its
10289 initializing value.
10291 In finish_enum we will reset the type. Of course, if we're
10292 processing a template, there may be no value. */
10293 type = value ? TREE_TYPE (value) : NULL_TREE;
10295 if (context && context == current_class_type)
10296 /* This enum declaration is local to the class. We need the full
10297 lang_decl so that we can record DECL_CLASS_CONTEXT, for example. */
10298 decl = build_lang_decl (CONST_DECL, name, type);
10300 /* It's a global enum, or it's local to a function. (Note local to
10301 a function could mean local to a class method. */
10302 decl = build_decl (CONST_DECL, name, type);
10304 DECL_CONTEXT (decl) = FROB_CONTEXT (context);
10305 TREE_CONSTANT (decl) = 1;
10306 TREE_INVARIANT (decl) = 1;
10307 TREE_READONLY (decl) = 1;
10308 DECL_INITIAL (decl) = value;
10310 if (context && context == current_class_type)
10311 /* In something like `struct S { enum E { i = 7 }; };' we put `i'
10312 on the TYPE_FIELDS list for `S'. (That's so that you can say
10313 things like `S::i' later.) */
10314 finish_member_declaration (decl);
10318 /* Add this enumeration constant to the list for this type. */
10319 TYPE_VALUES (enumtype) = tree_cons (name, decl, TYPE_VALUES (enumtype));
10323 /* We're defining DECL. Make sure that it's type is OK. */
10326 check_function_type (tree decl, tree current_function_parms)
10328 tree fntype = TREE_TYPE (decl);
10329 tree return_type = complete_type (TREE_TYPE (fntype));
10331 /* In a function definition, arg types must be complete. */
10332 require_complete_types_for_parms (current_function_parms);
10334 if (dependent_type_p (return_type))
10336 if (!COMPLETE_OR_VOID_TYPE_P (return_type))
10338 tree args = TYPE_ARG_TYPES (fntype);
10340 error ("return type %q#T is incomplete", return_type);
10342 /* Make it return void instead. */
10343 if (TREE_CODE (fntype) == METHOD_TYPE)
10344 fntype = build_method_type_directly (TREE_TYPE (TREE_VALUE (args)),
10346 TREE_CHAIN (args));
10348 fntype = build_function_type (void_type_node, args);
10350 = build_exception_variant (fntype,
10351 TYPE_RAISES_EXCEPTIONS (TREE_TYPE (decl)));
10354 abstract_virtuals_error (decl, TREE_TYPE (fntype));
10357 /* Create the FUNCTION_DECL for a function definition.
10358 DECLSPECS and DECLARATOR are the parts of the declaration;
10359 they describe the function's name and the type it returns,
10360 but twisted together in a fashion that parallels the syntax of C.
10362 FLAGS is a bitwise or of SF_PRE_PARSED (indicating that the
10363 DECLARATOR is really the DECL for the function we are about to
10364 process and that DECLSPECS should be ignored), SF_INCLASS_INLINE
10365 indicating that the function is an inline defined in-class.
10367 This function creates a binding context for the function body
10368 as well as setting up the FUNCTION_DECL in current_function_decl.
10370 For C++, we must first check whether that datum makes any sense.
10371 For example, "class A local_a(1,2);" means that variable local_a
10372 is an aggregate of type A, which should have a constructor
10373 applied to it with the argument list [1, 2]. */
10376 start_preparsed_function (tree decl1, tree attrs, int flags)
10378 tree ctype = NULL_TREE;
10381 int doing_friend = 0;
10382 struct cp_binding_level *bl;
10383 tree current_function_parms;
10384 struct c_fileinfo *finfo
10385 = get_fileinfo (LOCATION_FILE (DECL_SOURCE_LOCATION (decl1)));
10386 bool honor_interface;
10388 /* Sanity check. */
10389 gcc_assert (TREE_CODE (TREE_VALUE (void_list_node)) == VOID_TYPE);
10390 gcc_assert (TREE_CHAIN (void_list_node) == NULL_TREE);
10392 fntype = TREE_TYPE (decl1);
10393 if (TREE_CODE (fntype) == METHOD_TYPE)
10394 ctype = TYPE_METHOD_BASETYPE (fntype);
10396 /* ISO C++ 11.4/5. A friend function defined in a class is in
10397 the (lexical) scope of the class in which it is defined. */
10398 if (!ctype && DECL_FRIEND_P (decl1))
10400 ctype = DECL_FRIEND_CONTEXT (decl1);
10402 /* CTYPE could be null here if we're dealing with a template;
10403 for example, `inline friend float foo()' inside a template
10404 will have no CTYPE set. */
10405 if (ctype && TREE_CODE (ctype) != RECORD_TYPE)
10411 if (DECL_DECLARED_INLINE_P (decl1)
10412 && lookup_attribute ("noinline", attrs))
10413 warning (0, "inline function %q+D given attribute noinline", decl1);
10415 if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (decl1))
10416 /* This is a constructor, we must ensure that any default args
10417 introduced by this definition are propagated to the clones
10418 now. The clones are used directly in overload resolution. */
10419 adjust_clone_args (decl1);
10421 /* Sometimes we don't notice that a function is a static member, and
10422 build a METHOD_TYPE for it. Fix that up now. */
10423 if (ctype != NULL_TREE && DECL_STATIC_FUNCTION_P (decl1)
10424 && TREE_CODE (TREE_TYPE (decl1)) == METHOD_TYPE)
10426 revert_static_member_fn (decl1);
10430 /* Set up current_class_type, and enter the scope of the class, if
10433 push_nested_class (ctype);
10434 else if (DECL_STATIC_FUNCTION_P (decl1))
10435 push_nested_class (DECL_CONTEXT (decl1));
10437 /* Now that we have entered the scope of the class, we must restore
10438 the bindings for any template parameters surrounding DECL1, if it
10439 is an inline member template. (Order is important; consider the
10440 case where a template parameter has the same name as a field of
10441 the class.) It is not until after this point that
10442 PROCESSING_TEMPLATE_DECL is guaranteed to be set up correctly. */
10443 if (flags & SF_INCLASS_INLINE)
10444 maybe_begin_member_template_processing (decl1);
10446 /* Effective C++ rule 15. */
10448 && DECL_OVERLOADED_OPERATOR_P (decl1) == NOP_EXPR
10449 && TREE_CODE (TREE_TYPE (fntype)) == VOID_TYPE)
10450 warning (OPT_Weffc__, "%<operator=%> should return a reference to %<*this%>");
10452 /* Make the init_value nonzero so pushdecl knows this is not tentative.
10453 error_mark_node is replaced below (in poplevel) with the BLOCK. */
10454 if (!DECL_INITIAL (decl1))
10455 DECL_INITIAL (decl1) = error_mark_node;
10457 /* This function exists in static storage.
10458 (This does not mean `static' in the C sense!) */
10459 TREE_STATIC (decl1) = 1;
10461 /* We must call push_template_decl after current_class_type is set
10462 up. (If we are processing inline definitions after exiting a
10463 class scope, current_class_type will be NULL_TREE until set above
10464 by push_nested_class.) */
10465 if (processing_template_decl)
10467 /* FIXME: Handle error_mark_node more gracefully. */
10468 tree newdecl1 = push_template_decl (decl1);
10469 if (newdecl1 != error_mark_node)
10473 /* We are now in the scope of the function being defined. */
10474 current_function_decl = decl1;
10476 /* Save the parm names or decls from this function's declarator
10477 where store_parm_decls will find them. */
10478 current_function_parms = DECL_ARGUMENTS (decl1);
10480 /* Make sure the parameter and return types are reasonable. When
10481 you declare a function, these types can be incomplete, but they
10482 must be complete when you define the function. */
10483 check_function_type (decl1, current_function_parms);
10485 /* Build the return declaration for the function. */
10486 restype = TREE_TYPE (fntype);
10487 /* Promote the value to int before returning it. */
10488 if (c_promoting_integer_type_p (restype))
10489 restype = type_promotes_to (restype);
10490 if (DECL_RESULT (decl1) == NULL_TREE)
10494 resdecl = build_decl (RESULT_DECL, 0, TYPE_MAIN_VARIANT (restype));
10495 DECL_ARTIFICIAL (resdecl) = 1;
10496 DECL_IGNORED_P (resdecl) = 1;
10497 DECL_RESULT (decl1) = resdecl;
10499 cp_apply_type_quals_to_decl (cp_type_quals (restype), resdecl);
10502 /* Initialize RTL machinery. We cannot do this until
10503 CURRENT_FUNCTION_DECL and DECL_RESULT are set up. We do this
10504 even when processing a template; this is how we get
10505 CFUN set up, and our per-function variables initialized.
10506 FIXME factor out the non-RTL stuff. */
10507 bl = current_binding_level;
10508 allocate_struct_function (decl1);
10509 current_binding_level = bl;
10511 /* Even though we're inside a function body, we still don't want to
10512 call expand_expr to calculate the size of a variable-sized array.
10513 We haven't necessarily assigned RTL to all variables yet, so it's
10514 not safe to try to expand expressions involving them. */
10515 cfun->x_dont_save_pending_sizes_p = 1;
10517 /* Start the statement-tree, start the tree now. */
10518 DECL_SAVED_TREE (decl1) = push_stmt_list ();
10520 /* Let the user know we're compiling this function. */
10521 announce_function (decl1);
10523 /* Record the decl so that the function name is defined.
10524 If we already have a decl for this name, and it is a FUNCTION_DECL,
10525 use the old decl. */
10526 if (!processing_template_decl && !(flags & SF_PRE_PARSED))
10528 /* A specialization is not used to guide overload resolution. */
10529 if (!DECL_FUNCTION_MEMBER_P (decl1)
10530 && !(DECL_USE_TEMPLATE (decl1) &&
10531 PRIMARY_TEMPLATE_P (DECL_TI_TEMPLATE (decl1))))
10533 tree olddecl = pushdecl (decl1);
10535 if (olddecl == error_mark_node)
10536 /* If something went wrong when registering the declaration,
10537 use DECL1; we have to have a FUNCTION_DECL to use when
10538 parsing the body of the function. */
10541 /* Otherwise, OLDDECL is either a previous declaration of
10542 the same function or DECL1 itself. */
10547 /* We need to set the DECL_CONTEXT. */
10548 if (!DECL_CONTEXT (decl1) && DECL_TEMPLATE_INFO (decl1))
10549 DECL_CONTEXT (decl1) = DECL_CONTEXT (DECL_TI_TEMPLATE (decl1));
10551 fntype = TREE_TYPE (decl1);
10553 /* If #pragma weak applies, mark the decl appropriately now.
10554 The pragma only applies to global functions. Because
10555 determining whether or not the #pragma applies involves
10556 computing the mangled name for the declaration, we cannot
10557 apply the pragma until after we have merged this declaration
10558 with any previous declarations; if the original declaration
10559 has a linkage specification, that specification applies to
10560 the definition as well, and may affect the mangled name. */
10561 if (!DECL_CONTEXT (decl1))
10562 maybe_apply_pragma_weak (decl1);
10565 /* Reset these in case the call to pushdecl changed them. */
10566 current_function_decl = decl1;
10567 cfun->decl = decl1;
10569 /* If we are (erroneously) defining a function that we have already
10570 defined before, wipe out what we knew before. */
10571 if (!DECL_PENDING_INLINE_P (decl1))
10572 DECL_SAVED_FUNCTION_DATA (decl1) = NULL;
10574 if (ctype && !doing_friend && !DECL_STATIC_FUNCTION_P (decl1))
10576 /* We know that this was set up by `grokclassfn'. We do not
10577 wait until `store_parm_decls', since evil parse errors may
10578 never get us to that point. Here we keep the consistency
10579 between `current_class_type' and `current_class_ptr'. */
10580 tree t = DECL_ARGUMENTS (decl1);
10582 gcc_assert (t != NULL_TREE && TREE_CODE (t) == PARM_DECL);
10583 gcc_assert (TREE_CODE (TREE_TYPE (t)) == POINTER_TYPE);
10585 cp_function_chain->x_current_class_ref
10586 = build_indirect_ref (t, NULL);
10587 cp_function_chain->x_current_class_ptr = t;
10589 /* Constructors and destructors need to know whether they're "in
10590 charge" of initializing virtual base classes. */
10591 t = TREE_CHAIN (t);
10592 if (DECL_HAS_IN_CHARGE_PARM_P (decl1))
10594 current_in_charge_parm = t;
10595 t = TREE_CHAIN (t);
10597 if (DECL_HAS_VTT_PARM_P (decl1))
10599 gcc_assert (DECL_NAME (t) == vtt_parm_identifier);
10600 current_vtt_parm = t;
10604 honor_interface = (!DECL_TEMPLATE_INSTANTIATION (decl1)
10605 /* Implicitly-defined methods (like the
10606 destructor for a class in which no destructor
10607 is explicitly declared) must not be defined
10608 until their definition is needed. So, we
10609 ignore interface specifications for
10610 compiler-generated functions. */
10611 && !DECL_ARTIFICIAL (decl1));
10613 if (DECL_INTERFACE_KNOWN (decl1))
10615 tree ctx = decl_function_context (decl1);
10617 if (DECL_NOT_REALLY_EXTERN (decl1))
10618 DECL_EXTERNAL (decl1) = 0;
10620 if (ctx != NULL_TREE && DECL_DECLARED_INLINE_P (ctx)
10621 && TREE_PUBLIC (ctx))
10622 /* This is a function in a local class in an extern inline
10624 comdat_linkage (decl1);
10626 /* If this function belongs to an interface, it is public.
10627 If it belongs to someone else's interface, it is also external.
10628 This only affects inlines and template instantiations. */
10629 else if (!finfo->interface_unknown && honor_interface)
10631 if (DECL_DECLARED_INLINE_P (decl1)
10632 || DECL_TEMPLATE_INSTANTIATION (decl1)
10633 || processing_template_decl)
10635 DECL_EXTERNAL (decl1)
10636 = (finfo->interface_only
10637 || (DECL_DECLARED_INLINE_P (decl1)
10638 && ! flag_implement_inlines
10639 && !DECL_VINDEX (decl1)));
10641 /* For WIN32 we also want to put these in linkonce sections. */
10642 maybe_make_one_only (decl1);
10645 DECL_EXTERNAL (decl1) = 0;
10646 DECL_INTERFACE_KNOWN (decl1) = 1;
10647 /* If this function is in an interface implemented in this file,
10648 make sure that the backend knows to emit this function
10650 if (!DECL_EXTERNAL (decl1))
10651 mark_needed (decl1);
10653 else if (finfo->interface_unknown && finfo->interface_only
10654 && honor_interface)
10656 /* If MULTIPLE_SYMBOL_SPACES is defined and we saw a #pragma
10657 interface, we will have both finfo->interface_unknown and
10658 finfo->interface_only set. In that case, we don't want to
10659 use the normal heuristics because someone will supply a
10660 #pragma implementation elsewhere, and deducing it here would
10661 produce a conflict. */
10662 comdat_linkage (decl1);
10663 DECL_EXTERNAL (decl1) = 0;
10664 DECL_INTERFACE_KNOWN (decl1) = 1;
10665 DECL_DEFER_OUTPUT (decl1) = 1;
10669 /* This is a definition, not a reference.
10670 So clear DECL_EXTERNAL. */
10671 DECL_EXTERNAL (decl1) = 0;
10673 if ((DECL_DECLARED_INLINE_P (decl1)
10674 || DECL_TEMPLATE_INSTANTIATION (decl1))
10675 && ! DECL_INTERFACE_KNOWN (decl1)
10676 /* Don't try to defer nested functions for now. */
10677 && ! decl_function_context (decl1))
10678 DECL_DEFER_OUTPUT (decl1) = 1;
10680 DECL_INTERFACE_KNOWN (decl1) = 1;
10683 /* Determine the ELF visibility attribute for the function. We must not
10684 do this before calling "pushdecl", as we must allow "duplicate_decls"
10685 to merge any attributes appropriately. We also need to wait until
10687 if (!DECL_CLONED_FUNCTION_P (decl1))
10688 determine_visibility (decl1);
10690 begin_scope (sk_function_parms, decl1);
10694 if (DECL_DESTRUCTOR_P (decl1)
10695 || (DECL_CONSTRUCTOR_P (decl1)
10696 && targetm.cxx.cdtor_returns_this ()))
10698 cdtor_label = build_decl (LABEL_DECL, NULL_TREE, NULL_TREE);
10699 DECL_CONTEXT (cdtor_label) = current_function_decl;
10702 start_fname_decls ();
10704 store_parm_decls (current_function_parms);
10708 /* Like start_preparsed_function, except that instead of a
10709 FUNCTION_DECL, this function takes DECLSPECS and DECLARATOR.
10711 Returns 1 on success. If the DECLARATOR is not suitable for a function
10712 (it defines a datum instead), we return 0, which tells
10713 yyparse to report a parse error. */
10716 start_function (cp_decl_specifier_seq *declspecs,
10717 const cp_declarator *declarator,
10722 decl1 = grokdeclarator (declarator, declspecs, FUNCDEF, 1, &attrs);
10723 /* If the declarator is not suitable for a function definition,
10724 cause a syntax error. */
10725 if (decl1 == NULL_TREE || TREE_CODE (decl1) != FUNCTION_DECL)
10728 if (DECL_MAIN_P (decl1))
10729 /* main must return int. grokfndecl should have corrected it
10730 (and issued a diagnostic) if the user got it wrong. */
10731 gcc_assert (same_type_p (TREE_TYPE (TREE_TYPE (decl1)),
10732 integer_type_node));
10734 start_preparsed_function (decl1, attrs, /*flags=*/SF_DEFAULT);
10739 /* Returns true iff an EH_SPEC_BLOCK should be created in the body of
10743 use_eh_spec_block (tree fn)
10745 return (flag_exceptions && flag_enforce_eh_specs
10746 && !processing_template_decl
10747 && TYPE_RAISES_EXCEPTIONS (TREE_TYPE (fn))
10748 /* We insert the EH_SPEC_BLOCK only in the original
10749 function; then, it is copied automatically to the
10751 && !DECL_CLONED_FUNCTION_P (fn)
10752 /* Implicitly-generated constructors and destructors have
10753 exception specifications. However, those specifications
10754 are the union of the possible exceptions specified by the
10755 constructors/destructors for bases and members, so no
10756 unallowed exception will ever reach this function. By
10757 not creating the EH_SPEC_BLOCK we save a little memory,
10758 and we avoid spurious warnings about unreachable
10760 && !DECL_ARTIFICIAL (fn));
10763 /* Store the parameter declarations into the current function declaration.
10764 This is called after parsing the parameter declarations, before
10765 digesting the body of the function.
10767 Also install to binding contour return value identifier, if any. */
10770 store_parm_decls (tree current_function_parms)
10772 tree fndecl = current_function_decl;
10775 /* This is a chain of any other decls that came in among the parm
10776 declarations. If a parm is declared with enum {foo, bar} x;
10777 then CONST_DECLs for foo and bar are put here. */
10778 tree nonparms = NULL_TREE;
10780 if (current_function_parms)
10782 /* This case is when the function was defined with an ANSI prototype.
10783 The parms already have decls, so we need not do anything here
10784 except record them as in effect
10785 and complain if any redundant old-style parm decls were written. */
10787 tree specparms = current_function_parms;
10790 /* Must clear this because it might contain TYPE_DECLs declared
10792 current_binding_level->names = NULL;
10794 /* If we're doing semantic analysis, then we'll call pushdecl
10795 for each of these. We must do them in reverse order so that
10796 they end in the correct forward order. */
10797 specparms = nreverse (specparms);
10799 for (parm = specparms; parm; parm = next)
10801 next = TREE_CHAIN (parm);
10802 if (TREE_CODE (parm) == PARM_DECL)
10804 if (DECL_NAME (parm) == NULL_TREE
10805 || TREE_CODE (parm) != VOID_TYPE)
10808 error ("parameter %qD declared void", parm);
10812 /* If we find an enum constant or a type tag,
10813 put it aside for the moment. */
10814 TREE_CHAIN (parm) = NULL_TREE;
10815 nonparms = chainon (nonparms, parm);
10819 /* Get the decls in their original chain order and record in the
10820 function. This is all and only the PARM_DECLs that were
10821 pushed into scope by the loop above. */
10822 DECL_ARGUMENTS (fndecl) = getdecls ();
10825 DECL_ARGUMENTS (fndecl) = NULL_TREE;
10827 /* Now store the final chain of decls for the arguments
10828 as the decl-chain of the current lexical scope.
10829 Put the enumerators in as well, at the front so that
10830 DECL_ARGUMENTS is not modified. */
10831 current_binding_level->names = chainon (nonparms, DECL_ARGUMENTS (fndecl));
10833 if (use_eh_spec_block (current_function_decl))
10834 current_eh_spec_block = begin_eh_spec_block ();
10838 /* We have finished doing semantic analysis on DECL, but have not yet
10839 generated RTL for its body. Save away our current state, so that
10840 when we want to generate RTL later we know what to do. */
10843 save_function_data (tree decl)
10845 struct language_function *f;
10847 /* Save the language-specific per-function data so that we can
10848 get it back when we really expand this function. */
10849 gcc_assert (!DECL_PENDING_INLINE_P (decl));
10852 f = GGC_NEW (struct language_function);
10853 memcpy (f, cp_function_chain, sizeof (struct language_function));
10854 DECL_SAVED_FUNCTION_DATA (decl) = f;
10856 /* Clear out the bits we don't need. */
10857 f->base.x_stmt_tree.x_cur_stmt_list = NULL_TREE;
10858 f->bindings = NULL;
10859 f->x_local_names = NULL;
10863 /* Set the return value of the constructor (if present). */
10866 finish_constructor_body (void)
10871 if (targetm.cxx.cdtor_returns_this ())
10873 /* Any return from a constructor will end up here. */
10874 add_stmt (build_stmt (LABEL_EXPR, cdtor_label));
10876 val = DECL_ARGUMENTS (current_function_decl);
10877 val = build2 (MODIFY_EXPR, TREE_TYPE (val),
10878 DECL_RESULT (current_function_decl), val);
10879 /* Return the address of the object. */
10880 exprstmt = build_stmt (RETURN_EXPR, val);
10881 add_stmt (exprstmt);
10885 /* Do all the processing for the beginning of a destructor; set up the
10886 vtable pointers and cleanups for bases and members. */
10889 begin_destructor_body (void)
10891 tree compound_stmt;
10893 /* If the CURRENT_CLASS_TYPE is incomplete, we will have already
10894 issued an error message. We still want to try to process the
10895 body of the function, but initialize_vtbl_ptrs will crash if
10896 TYPE_BINFO is NULL. */
10897 if (COMPLETE_TYPE_P (current_class_type))
10899 compound_stmt = begin_compound_stmt (0);
10900 /* Make all virtual function table pointers in non-virtual base
10901 classes point to CURRENT_CLASS_TYPE's virtual function
10903 initialize_vtbl_ptrs (current_class_ptr);
10904 finish_compound_stmt (compound_stmt);
10906 /* And insert cleanups for our bases and members so that they
10907 will be properly destroyed if we throw. */
10908 push_base_cleanups ();
10912 /* At the end of every destructor we generate code to delete the object if
10913 necessary. Do that now. */
10916 finish_destructor_body (void)
10920 /* Any return from a destructor will end up here; that way all base
10921 and member cleanups will be run when the function returns. */
10922 add_stmt (build_stmt (LABEL_EXPR, cdtor_label));
10924 /* In a virtual destructor, we must call delete. */
10925 if (DECL_VIRTUAL_P (current_function_decl))
10928 tree virtual_size = cxx_sizeof (current_class_type);
10932 At the point of definition of a virtual destructor (including
10933 an implicit definition), non-placement operator delete shall
10934 be looked up in the scope of the destructor's class and if
10935 found shall be accessible and unambiguous. */
10936 exprstmt = build_op_delete_call(DELETE_EXPR, current_class_ptr,
10938 /*global_p=*/false,
10939 /*placement=*/NULL_TREE,
10940 /*alloc_fn=*/NULL_TREE);
10942 if_stmt = begin_if_stmt ();
10943 finish_if_stmt_cond (build2 (BIT_AND_EXPR, integer_type_node,
10944 current_in_charge_parm,
10947 finish_expr_stmt (exprstmt);
10948 finish_then_clause (if_stmt);
10949 finish_if_stmt (if_stmt);
10952 if (targetm.cxx.cdtor_returns_this ())
10956 val = DECL_ARGUMENTS (current_function_decl);
10957 val = build2 (MODIFY_EXPR, TREE_TYPE (val),
10958 DECL_RESULT (current_function_decl), val);
10959 /* Return the address of the object. */
10960 exprstmt = build_stmt (RETURN_EXPR, val);
10961 add_stmt (exprstmt);
10965 /* Do the necessary processing for the beginning of a function body, which
10966 in this case includes member-initializers, but not the catch clauses of
10967 a function-try-block. Currently, this means opening a binding level
10968 for the member-initializers (in a ctor) and member cleanups (in a dtor). */
10971 begin_function_body (void)
10975 if (! FUNCTION_NEEDS_BODY_BLOCK (current_function_decl))
10978 if (processing_template_decl)
10979 /* Do nothing now. */;
10981 /* Always keep the BLOCK node associated with the outermost pair of
10982 curly braces of a function. These are needed for correct
10983 operation of dwarfout.c. */
10984 keep_next_level (true);
10986 stmt = begin_compound_stmt (BCS_FN_BODY);
10988 if (processing_template_decl)
10989 /* Do nothing now. */;
10990 else if (DECL_DESTRUCTOR_P (current_function_decl))
10991 begin_destructor_body ();
10996 /* Do the processing for the end of a function body. Currently, this means
10997 closing out the cleanups for fully-constructed bases and members, and in
10998 the case of the destructor, deleting the object if desired. Again, this
10999 is only meaningful for [cd]tors, since they are the only functions where
11000 there is a significant distinction between the main body and any
11001 function catch clauses. Handling, say, main() return semantics here
11002 would be wrong, as flowing off the end of a function catch clause for
11003 main() would also need to return 0. */
11006 finish_function_body (tree compstmt)
11008 if (compstmt == NULL_TREE)
11011 /* Close the block. */
11012 finish_compound_stmt (compstmt);
11014 if (processing_template_decl)
11015 /* Do nothing now. */;
11016 else if (DECL_CONSTRUCTOR_P (current_function_decl))
11017 finish_constructor_body ();
11018 else if (DECL_DESTRUCTOR_P (current_function_decl))
11019 finish_destructor_body ();
11022 /* Given a function, returns the BLOCK corresponding to the outermost level
11023 of curly braces, skipping the artificial block created for constructor
11027 outer_curly_brace_block (tree fndecl)
11029 tree block = BLOCK_SUBBLOCKS (DECL_INITIAL (fndecl));
11030 if (FUNCTION_NEEDS_BODY_BLOCK (current_function_decl))
11031 /* Skip the artificial function body block. */
11032 block = BLOCK_SUBBLOCKS (block);
11036 /* Finish up a function declaration and compile that function
11037 all the way to assembler language output. The free the storage
11038 for the function definition.
11040 FLAGS is a bitwise or of the following values:
11042 We just finished processing the body of an in-class inline
11043 function definition. (This processing will have taken place
11044 after the class definition is complete.) */
11047 finish_function (int flags)
11049 tree fndecl = current_function_decl;
11050 tree fntype, ctype = NULL_TREE;
11051 int inclass_inline = (flags & 2) != 0;
11054 /* When we get some parse errors, we can end up without a
11055 current_function_decl, so cope. */
11056 if (fndecl == NULL_TREE)
11057 return error_mark_node;
11059 if (DECL_NONSTATIC_MEMBER_FUNCTION_P (fndecl)
11060 && DECL_VIRTUAL_P (fndecl)
11061 && !processing_template_decl)
11063 tree fnclass = DECL_CONTEXT (fndecl);
11064 if (fndecl == CLASSTYPE_KEY_METHOD (fnclass))
11065 keyed_classes = tree_cons (NULL_TREE, fnclass, keyed_classes);
11068 nested = function_depth > 1;
11069 fntype = TREE_TYPE (fndecl);
11071 /* TREE_READONLY (fndecl) = 1;
11072 This caused &foo to be of type ptr-to-const-function
11073 which then got a warning when stored in a ptr-to-function variable. */
11075 gcc_assert (building_stmt_tree ());
11077 /* For a cloned function, we've already got all the code we need;
11078 there's no need to add any extra bits. */
11079 if (!DECL_CLONED_FUNCTION_P (fndecl))
11081 if (DECL_MAIN_P (current_function_decl))
11085 /* Make it so that `main' always returns 0 by default (or
11088 stmt = finish_return_stmt (integer_one_node);
11090 stmt = finish_return_stmt (integer_zero_node);
11092 /* Hack. We don't want the middle-end to warn that this
11093 return is unreachable, so put the statement on the
11095 #ifdef USE_MAPPED_LOCATION
11096 SET_EXPR_LOCATION (stmt, UNKNOWN_LOCATION);
11098 annotate_with_file_line (stmt, input_filename, 0);
11102 if (use_eh_spec_block (current_function_decl))
11103 finish_eh_spec_block (TYPE_RAISES_EXCEPTIONS
11104 (TREE_TYPE (current_function_decl)),
11105 current_eh_spec_block);
11108 /* If we're saving up tree structure, tie off the function now. */
11109 DECL_SAVED_TREE (fndecl) = pop_stmt_list (DECL_SAVED_TREE (fndecl));
11111 finish_fname_decls ();
11113 /* If this function can't throw any exceptions, remember that. */
11114 if (!processing_template_decl
11115 && !cp_function_chain->can_throw
11116 && !flag_non_call_exceptions
11117 && targetm.binds_local_p (fndecl))
11118 TREE_NOTHROW (fndecl) = 1;
11120 /* This must come after expand_function_end because cleanups might
11121 have declarations (from inline functions) that need to go into
11122 this function's blocks. */
11124 /* If the current binding level isn't the outermost binding level
11125 for this function, either there is a bug, or we have experienced
11126 syntax errors and the statement tree is malformed. */
11127 if (current_binding_level->kind != sk_function_parms)
11129 /* Make sure we have already experienced errors. */
11130 gcc_assert (errorcount);
11132 /* Throw away the broken statement tree and extra binding
11134 DECL_SAVED_TREE (fndecl) = alloc_stmt_list ();
11136 while (current_binding_level->kind != sk_function_parms)
11138 if (current_binding_level->kind == sk_class)
11139 pop_nested_class ();
11141 poplevel (0, 0, 0);
11144 poplevel (1, 0, 1);
11146 /* Statements should always be full-expressions at the outermost set
11147 of curly braces for a function. */
11148 gcc_assert (stmts_are_full_exprs_p ());
11150 /* Set up the named return value optimization, if we can. Candidate
11151 variables are selected in check_return_value. */
11152 if (current_function_return_value)
11154 tree r = current_function_return_value;
11157 if (r != error_mark_node
11158 /* This is only worth doing for fns that return in memory--and
11159 simpler, since we don't have to worry about promoted modes. */
11160 && aggregate_value_p (TREE_TYPE (TREE_TYPE (fndecl)), fndecl)
11161 /* Only allow this for variables declared in the outer scope of
11162 the function so we know that their lifetime always ends with a
11163 return; see g++.dg/opt/nrv6.C. We could be more flexible if
11164 we were to do this optimization in tree-ssa. */
11165 && (outer = outer_curly_brace_block (fndecl))
11166 && chain_member (r, BLOCK_VARS (outer)))
11167 finalize_nrv (&DECL_SAVED_TREE (fndecl), r, DECL_RESULT (fndecl));
11169 current_function_return_value = NULL_TREE;
11172 /* Remember that we were in class scope. */
11173 if (current_class_name)
11174 ctype = current_class_type;
11176 /* Must mark the RESULT_DECL as being in this function. */
11177 DECL_CONTEXT (DECL_RESULT (fndecl)) = fndecl;
11179 /* Set the BLOCK_SUPERCONTEXT of the outermost function scope to point
11180 to the FUNCTION_DECL node itself. */
11181 BLOCK_SUPERCONTEXT (DECL_INITIAL (fndecl)) = fndecl;
11183 /* Save away current state, if appropriate. */
11184 if (!processing_template_decl)
11185 save_function_data (fndecl);
11187 /* Complain if there's just no return statement. */
11188 if (warn_return_type
11189 && TREE_CODE (TREE_TYPE (fntype)) != VOID_TYPE
11190 && !dependent_type_p (TREE_TYPE (fntype))
11191 && !current_function_returns_value && !current_function_returns_null
11192 /* Don't complain if we abort or throw. */
11193 && !current_function_returns_abnormally
11194 && !DECL_NAME (DECL_RESULT (fndecl))
11195 /* Normally, with -Wreturn-type, flow will complain. Unless we're an
11196 inline function, as we might never be compiled separately. */
11197 && (DECL_INLINE (fndecl) || processing_template_decl)
11198 /* Structor return values (if any) are set by the compiler. */
11199 && !DECL_CONSTRUCTOR_P (fndecl)
11200 && !DECL_DESTRUCTOR_P (fndecl))
11201 warning (OPT_Wreturn_type, "no return statement in function returning non-void");
11203 /* Store the end of the function, so that we get good line number
11204 info for the epilogue. */
11205 cfun->function_end_locus = input_location;
11207 /* Genericize before inlining. */
11208 if (!processing_template_decl)
11210 struct language_function *f = DECL_SAVED_FUNCTION_DATA (fndecl);
11211 cp_genericize (fndecl);
11212 /* Clear out the bits we don't need. */
11213 f->x_current_class_ptr = NULL;
11214 f->x_current_class_ref = NULL;
11215 f->x_eh_spec_block = NULL;
11216 f->x_in_charge_parm = NULL;
11217 f->x_vtt_parm = NULL;
11218 f->x_return_value = NULL;
11219 f->bindings = NULL;
11220 f->extern_decl_map = NULL;
11222 /* Handle attribute((warn_unused_result)). Relies on gimple input. */
11223 c_warn_unused_result (&DECL_SAVED_TREE (fndecl));
11225 /* Clear out the bits we don't need. */
11226 local_names = NULL;
11228 /* We're leaving the context of this function, so zap cfun. It's still in
11229 DECL_STRUCT_FUNCTION, and we'll restore it in tree_rest_of_compilation. */
11231 current_function_decl = NULL;
11233 /* If this is an in-class inline definition, we may have to pop the
11234 bindings for the template parameters that we added in
11235 maybe_begin_member_template_processing when start_function was
11237 if (inclass_inline)
11238 maybe_end_member_template_processing ();
11240 /* Leave the scope of the class. */
11242 pop_nested_class ();
11248 /* Let the error reporting routines know that we're outside a
11249 function. For a nested function, this value is used in
11250 cxx_pop_function_context and then reset via pop_function_context. */
11251 current_function_decl = NULL_TREE;
11256 /* Create the FUNCTION_DECL for a function definition.
11257 DECLSPECS and DECLARATOR are the parts of the declaration;
11258 they describe the return type and the name of the function,
11259 but twisted together in a fashion that parallels the syntax of C.
11261 This function creates a binding context for the function body
11262 as well as setting up the FUNCTION_DECL in current_function_decl.
11264 Returns a FUNCTION_DECL on success.
11266 If the DECLARATOR is not suitable for a function (it defines a datum
11267 instead), we return 0, which tells yyparse to report a parse error.
11269 May return void_type_node indicating that this method is actually
11270 a friend. See grokfield for more details.
11272 Came here with a `.pushlevel' .
11274 DO NOT MAKE ANY CHANGES TO THIS CODE WITHOUT MAKING CORRESPONDING
11275 CHANGES TO CODE IN `grokfield'. */
11278 start_method (cp_decl_specifier_seq *declspecs,
11279 const cp_declarator *declarator, tree attrlist)
11281 tree fndecl = grokdeclarator (declarator, declspecs, MEMFUNCDEF, 0,
11284 if (fndecl == error_mark_node)
11285 return error_mark_node;
11287 if (fndecl == NULL || TREE_CODE (fndecl) != FUNCTION_DECL)
11289 error ("invalid member function declaration");
11290 return error_mark_node;
11294 cplus_decl_attributes (&fndecl, attrlist, 0);
11296 /* Pass friends other than inline friend functions back. */
11297 if (fndecl == void_type_node)
11300 if (DECL_IN_AGGR_P (fndecl))
11302 if (DECL_CONTEXT (fndecl)
11303 && TREE_CODE (DECL_CONTEXT (fndecl)) != NAMESPACE_DECL)
11304 error ("%qD is already defined in class %qT", fndecl,
11305 DECL_CONTEXT (fndecl));
11306 return error_mark_node;
11309 check_template_shadow (fndecl);
11311 DECL_DECLARED_INLINE_P (fndecl) = 1;
11312 if (flag_default_inline)
11313 DECL_INLINE (fndecl) = 1;
11315 /* We process method specializations in finish_struct_1. */
11316 if (processing_template_decl && !DECL_TEMPLATE_SPECIALIZATION (fndecl))
11318 fndecl = push_template_decl (fndecl);
11319 if (fndecl == error_mark_node)
11323 if (! DECL_FRIEND_P (fndecl))
11325 if (TREE_CHAIN (fndecl))
11327 fndecl = copy_node (fndecl);
11328 TREE_CHAIN (fndecl) = NULL_TREE;
11332 finish_decl (fndecl, NULL_TREE, NULL_TREE);
11334 /* Make a place for the parms. */
11335 begin_scope (sk_function_parms, fndecl);
11337 DECL_IN_AGGR_P (fndecl) = 1;
11341 /* Go through the motions of finishing a function definition.
11342 We don't compile this method until after the whole class has
11345 FINISH_METHOD must return something that looks as though it
11346 came from GROKFIELD (since we are defining a method, after all).
11348 This is called after parsing the body of the function definition.
11349 STMTS is the chain of statements that makes up the function body.
11351 DECL is the ..._DECL that `start_method' provided. */
11354 finish_method (tree decl)
11356 tree fndecl = decl;
11361 if (decl == void_type_node)
11364 old_initial = DECL_INITIAL (fndecl);
11366 /* Undo the level for the parms (from start_method).
11367 This is like poplevel, but it causes nothing to be
11368 saved. Saving information here confuses symbol-table
11369 output routines. Besides, this information will
11370 be correctly output when this method is actually
11373 /* Clear out the meanings of the local variables of this level;
11374 also record in each decl which block it belongs to. */
11376 for (link = current_binding_level->names; link; link = TREE_CHAIN (link))
11378 if (DECL_NAME (link) != NULL_TREE)
11379 pop_binding (DECL_NAME (link), link);
11380 gcc_assert (TREE_CODE (link) != FUNCTION_DECL);
11381 DECL_CONTEXT (link) = NULL_TREE;
11384 poplevel (0, 0, 0);
11386 DECL_INITIAL (fndecl) = old_initial;
11388 /* We used to check if the context of FNDECL was different from
11389 current_class_type as another way to get inside here. This didn't work
11390 for String.cc in libg++. */
11391 if (DECL_FRIEND_P (fndecl))
11393 VEC_safe_push (tree, gc, CLASSTYPE_INLINE_FRIENDS (current_class_type),
11395 decl = void_type_node;
11402 /* VAR is a VAR_DECL. If its type is incomplete, remember VAR so that
11403 we can lay it out later, when and if its type becomes complete. */
11406 maybe_register_incomplete_var (tree var)
11408 gcc_assert (TREE_CODE (var) == VAR_DECL);
11410 /* Keep track of variables with incomplete types. */
11411 if (!processing_template_decl && TREE_TYPE (var) != error_mark_node
11412 && DECL_EXTERNAL (var))
11414 tree inner_type = TREE_TYPE (var);
11416 while (TREE_CODE (inner_type) == ARRAY_TYPE)
11417 inner_type = TREE_TYPE (inner_type);
11418 inner_type = TYPE_MAIN_VARIANT (inner_type);
11420 if ((!COMPLETE_TYPE_P (inner_type) && CLASS_TYPE_P (inner_type))
11421 /* RTTI TD entries are created while defining the type_info. */
11422 || (TYPE_LANG_SPECIFIC (inner_type)
11423 && TYPE_BEING_DEFINED (inner_type)))
11424 incomplete_vars = tree_cons (inner_type, var, incomplete_vars);
11428 /* Called when a class type (given by TYPE) is defined. If there are
11429 any existing VAR_DECLs whose type hsa been completed by this
11430 declaration, update them now. */
11433 complete_vars (tree type)
11435 tree *list = &incomplete_vars;
11437 gcc_assert (CLASS_TYPE_P (type));
11440 if (same_type_p (type, TREE_PURPOSE (*list)))
11442 tree var = TREE_VALUE (*list);
11443 tree type = TREE_TYPE (var);
11444 /* Complete the type of the variable. The VAR_DECL itself
11445 will be laid out in expand_expr. */
11446 complete_type (type);
11447 cp_apply_type_quals_to_decl (cp_type_quals (type), var);
11448 /* Remove this entry from the list. */
11449 *list = TREE_CHAIN (*list);
11452 list = &TREE_CHAIN (*list);
11455 /* Check for pending declarations which may have abstract type. */
11456 complete_type_check_abstract (type);
11459 /* If DECL is of a type which needs a cleanup, build that cleanup
11463 cxx_maybe_build_cleanup (tree decl)
11465 tree type = TREE_TYPE (decl);
11467 if (type != error_mark_node && TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type))
11469 int flags = LOOKUP_NORMAL|LOOKUP_DESTRUCTOR;
11471 bool has_vbases = (TREE_CODE (type) == RECORD_TYPE
11472 && CLASSTYPE_VBASECLASSES (type));
11474 if (TREE_CODE (type) == ARRAY_TYPE)
11478 cxx_mark_addressable (decl);
11479 rval = build_unary_op (ADDR_EXPR, decl, 0);
11482 /* Optimize for space over speed here. */
11483 if (!has_vbases || flag_expensive_optimizations)
11484 flags |= LOOKUP_NONVIRTUAL;
11486 rval = build_delete (TREE_TYPE (rval), rval,
11487 sfk_complete_destructor, flags, 0);
11494 /* When a stmt has been parsed, this function is called. */
11501 /* DECL was originally constructed as a non-static member function,
11502 but turned out to be static. Update it accordingly. */
11505 revert_static_member_fn (tree decl)
11508 tree function = TREE_TYPE (decl);
11509 tree args = TYPE_ARG_TYPES (function);
11511 if (cp_type_quals (TREE_TYPE (TREE_VALUE (args)))
11512 != TYPE_UNQUALIFIED)
11513 error ("static member function %q#D declared with type qualifiers", decl);
11515 args = TREE_CHAIN (args);
11516 tmp = build_function_type (TREE_TYPE (function), args);
11517 tmp = build_qualified_type (tmp, cp_type_quals (function));
11518 tmp = build_exception_variant (tmp,
11519 TYPE_RAISES_EXCEPTIONS (function));
11520 TREE_TYPE (decl) = tmp;
11521 if (DECL_ARGUMENTS (decl))
11522 DECL_ARGUMENTS (decl) = TREE_CHAIN (DECL_ARGUMENTS (decl));
11523 DECL_STATIC_FUNCTION_P (decl) = 1;
11526 /* Initialize the variables used during compilation of a C++
11530 cxx_push_function_context (struct function * f)
11532 struct language_function *p = GGC_CNEW (struct language_function);
11535 /* Whenever we start a new function, we destroy temporaries in the
11537 current_stmt_tree ()->stmts_are_full_exprs_p = 1;
11543 if (DECL_SAVED_FUNCTION_DATA (fn))
11545 /* If we already parsed this function, and we're just expanding it
11546 now, restore saved state. */
11547 *cp_function_chain = *DECL_SAVED_FUNCTION_DATA (fn);
11549 /* We don't need the saved data anymore. Unless this is an inline
11550 function; we need the named return value info for
11551 declare_return_variable. */
11552 if (! DECL_INLINE (fn))
11553 DECL_SAVED_FUNCTION_DATA (fn) = NULL;
11558 /* Free the language-specific parts of F, now that we've finished
11559 compiling the function. */
11562 cxx_pop_function_context (struct function * f)
11567 /* Return which tree structure is used by T, or TS_CP_GENERIC if T is
11568 one of the language-independent trees. */
11570 enum cp_tree_node_structure_enum
11571 cp_tree_node_structure (union lang_tree_node * t)
11573 switch (TREE_CODE (&t->generic))
11575 case DEFAULT_ARG: return TS_CP_DEFAULT_ARG;
11576 case IDENTIFIER_NODE: return TS_CP_IDENTIFIER;
11577 case OVERLOAD: return TS_CP_OVERLOAD;
11578 case TEMPLATE_PARM_INDEX: return TS_CP_TPI;
11579 case TINST_LEVEL: return TS_CP_TINST_LEVEL;
11580 case PTRMEM_CST: return TS_CP_PTRMEM;
11581 case BASELINK: return TS_CP_BASELINK;
11582 default: return TS_CP_GENERIC;
11586 /* Build the void_list_node (void_type_node having been created). */
11588 build_void_list_node (void)
11590 tree t = build_tree_list (NULL_TREE, void_type_node);
11595 cp_missing_noreturn_ok_p (tree decl)
11597 /* A missing noreturn is ok for the `main' function. */
11598 return DECL_MAIN_P (decl);
11601 /* Return the COMDAT group into which DECL should be placed. */
11604 cxx_comdat_group (tree decl)
11608 /* Virtual tables, construction virtual tables, and virtual table
11609 tables all go in a single COMDAT group, named after the primary
11611 if (TREE_CODE (decl) == VAR_DECL && DECL_VTABLE_OR_VTT_P (decl))
11612 name = DECL_ASSEMBLER_NAME (CLASSTYPE_VTABLES (DECL_CONTEXT (decl)));
11613 /* For all other DECLs, the COMDAT group is the mangled name of the
11614 declaration itself. */
11617 while (DECL_THUNK_P (decl))
11619 /* If TARGET_USE_LOCAL_THUNK_ALIAS_P, use_thunk puts the thunk
11620 into the same section as the target function. In that case
11621 we must return target's name. */
11622 tree target = THUNK_TARGET (decl);
11623 if (TARGET_USE_LOCAL_THUNK_ALIAS_P (target)
11624 && DECL_SECTION_NAME (target) != NULL
11625 && DECL_ONE_ONLY (target))
11630 name = DECL_ASSEMBLER_NAME (decl);
11633 return IDENTIFIER_POINTER (name);
11636 #include "gt-cp-decl.h"