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)
2783 if (name == error_mark_node
2784 || context == NULL_TREE
2785 || context == error_mark_node)
2786 return error_mark_node;
2790 if (!(TYPE_LANG_SPECIFIC (name)
2791 && (CLASSTYPE_IS_TEMPLATE (name)
2792 || CLASSTYPE_USE_TEMPLATE (name))))
2793 name = TYPE_IDENTIFIER (name);
2795 /* Create a TEMPLATE_ID_EXPR for the type. */
2796 name = build_nt (TEMPLATE_ID_EXPR,
2797 CLASSTYPE_TI_TEMPLATE (name),
2798 CLASSTYPE_TI_ARGS (name));
2800 else if (TREE_CODE (name) == TYPE_DECL)
2801 name = DECL_NAME (name);
2805 if (TREE_CODE (name) == TEMPLATE_ID_EXPR)
2807 name = TREE_OPERAND (name, 0);
2808 if (TREE_CODE (name) == TEMPLATE_DECL)
2809 name = TREE_OPERAND (fullname, 0) = DECL_NAME (name);
2811 if (TREE_CODE (name) == TEMPLATE_DECL)
2813 error ("%qD used without template parameters", name);
2814 return error_mark_node;
2816 gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE);
2817 gcc_assert (TYPE_P (context));
2819 if (!dependent_type_p (context)
2820 || currently_open_class (context))
2822 if (TREE_CODE (fullname) == TEMPLATE_ID_EXPR)
2824 tree tmpl = NULL_TREE;
2825 if (IS_AGGR_TYPE (context))
2826 tmpl = lookup_field (context, name, 0, false);
2827 if (!tmpl || !DECL_CLASS_TEMPLATE_P (tmpl))
2829 if (complain & tf_error)
2830 error ("no class template named %q#T in %q#T",
2832 return error_mark_node;
2835 if (complain & tf_error)
2836 perform_or_defer_access_check (TYPE_BINFO (context), tmpl);
2838 return lookup_template_class (tmpl,
2839 TREE_OPERAND (fullname, 1),
2841 /*entering_scope=*/0,
2842 tf_warning_or_error | tf_user);
2848 if (!IS_AGGR_TYPE (context))
2850 if (complain & tf_error)
2851 error ("no type named %q#T in %q#T", name, context);
2852 return error_mark_node;
2855 t = lookup_field (context, name, 0, true);
2858 if (TREE_CODE (t) != TYPE_DECL)
2860 if (complain & tf_error)
2861 error ("no type named %q#T in %q#T", name, context);
2862 return error_mark_node;
2865 if (complain & tf_error)
2866 perform_or_defer_access_check (TYPE_BINFO (context), t);
2868 if (DECL_ARTIFICIAL (t) || !(complain & tf_keep_type_decl))
2876 /* If the CONTEXT is not a template type, then either the field is
2877 there now or its never going to be. */
2878 if (!dependent_type_p (context))
2880 if (complain & tf_error)
2881 error ("no type named %q#T in %q#T", name, context);
2882 return error_mark_node;
2885 return build_typename_type (context, name, fullname, tag_type);
2888 /* Resolve `CONTEXT::template NAME'. Returns a TEMPLATE_DECL if the name
2889 can be resolved or an UNBOUND_CLASS_TEMPLATE, unless an error occurs,
2890 in which case error_mark_node is returned.
2892 If PARM_LIST is non-NULL, also make sure that the template parameter
2893 list of TEMPLATE_DECL matches.
2895 If COMPLAIN zero, don't complain about any errors that occur. */
2898 make_unbound_class_template (tree context, tree name, tree parm_list,
2899 tsubst_flags_t complain)
2905 name = TYPE_IDENTIFIER (name);
2906 else if (DECL_P (name))
2907 name = DECL_NAME (name);
2908 gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE);
2910 if (!dependent_type_p (context)
2911 || currently_open_class (context))
2913 tree tmpl = NULL_TREE;
2915 if (IS_AGGR_TYPE (context))
2916 tmpl = lookup_field (context, name, 0, false);
2918 if (!tmpl || !DECL_CLASS_TEMPLATE_P (tmpl))
2920 if (complain & tf_error)
2921 error ("no class template named %q#T in %q#T", name, context);
2922 return error_mark_node;
2926 && !comp_template_parms (DECL_TEMPLATE_PARMS (tmpl), parm_list))
2928 if (complain & tf_error)
2930 error ("template parameters do not match template");
2931 error ("%q+D declared here", tmpl);
2933 return error_mark_node;
2936 if (complain & tf_error)
2937 perform_or_defer_access_check (TYPE_BINFO (context), tmpl);
2942 /* Build the UNBOUND_CLASS_TEMPLATE. */
2943 t = make_aggr_type (UNBOUND_CLASS_TEMPLATE);
2944 TYPE_CONTEXT (t) = FROB_CONTEXT (context);
2945 TREE_TYPE (t) = NULL_TREE;
2947 /* Build the corresponding TEMPLATE_DECL. */
2948 d = build_decl (TEMPLATE_DECL, name, t);
2949 TYPE_NAME (TREE_TYPE (d)) = d;
2950 TYPE_STUB_DECL (TREE_TYPE (d)) = d;
2951 DECL_CONTEXT (d) = FROB_CONTEXT (context);
2952 DECL_ARTIFICIAL (d) = 1;
2953 DECL_TEMPLATE_PARMS (d) = parm_list;
2960 /* Push the declarations of builtin types into the namespace.
2961 RID_INDEX is the index of the builtin type in the array
2962 RID_POINTERS. NAME is the name used when looking up the builtin
2963 type. TYPE is the _TYPE node for the builtin type. */
2966 record_builtin_type (enum rid rid_index,
2970 tree rname = NULL_TREE, tname = NULL_TREE;
2971 tree tdecl = NULL_TREE;
2973 if ((int) rid_index < (int) RID_MAX)
2974 rname = ridpointers[(int) rid_index];
2976 tname = get_identifier (name);
2978 /* The calls to SET_IDENTIFIER_GLOBAL_VALUE below should be
2979 eliminated. Built-in types should not be looked up name; their
2980 names are keywords that the parser can recognize. However, there
2981 is code in c-common.c that uses identifier_global_value to look
2982 up built-in types by name. */
2985 tdecl = build_decl (TYPE_DECL, tname, type);
2986 DECL_ARTIFICIAL (tdecl) = 1;
2987 SET_IDENTIFIER_GLOBAL_VALUE (tname, tdecl);
2993 tdecl = build_decl (TYPE_DECL, rname, type);
2994 DECL_ARTIFICIAL (tdecl) = 1;
2996 SET_IDENTIFIER_GLOBAL_VALUE (rname, tdecl);
2999 if (!TYPE_NAME (type))
3000 TYPE_NAME (type) = tdecl;
3003 debug_hooks->type_decl (tdecl, 0);
3006 /* Record one of the standard Java types.
3007 * Declare it as having the given NAME.
3008 * If SIZE > 0, it is the size of one of the integral types;
3009 * otherwise it is the negative of the size of one of the other types. */
3012 record_builtin_java_type (const char* name, int size)
3016 type = make_signed_type (size);
3017 else if (size > -32)
3018 { /* "__java_char" or ""__java_boolean". */
3019 type = make_unsigned_type (-size);
3020 /*if (size == -1) TREE_SET_CODE (type, BOOLEAN_TYPE);*/
3023 { /* "__java_float" or ""__java_double". */
3024 type = make_node (REAL_TYPE);
3025 TYPE_PRECISION (type) = - size;
3028 record_builtin_type (RID_MAX, name, type);
3029 decl = TYPE_NAME (type);
3031 /* Suppress generate debug symbol entries for these types,
3032 since for normal C++ they are just clutter.
3033 However, push_lang_context undoes this if extern "Java" is seen. */
3034 DECL_IGNORED_P (decl) = 1;
3036 TYPE_FOR_JAVA (type) = 1;
3040 /* Push a type into the namespace so that the back-ends ignore it. */
3043 record_unknown_type (tree type, const char* name)
3045 tree decl = pushdecl (build_decl (TYPE_DECL, get_identifier (name), type));
3046 /* Make sure the "unknown type" typedecl gets ignored for debug info. */
3047 DECL_IGNORED_P (decl) = 1;
3048 TYPE_DECL_SUPPRESS_DEBUG (decl) = 1;
3049 TYPE_SIZE (type) = TYPE_SIZE (void_type_node);
3050 TYPE_ALIGN (type) = 1;
3051 TYPE_USER_ALIGN (type) = 0;
3052 TYPE_MODE (type) = TYPE_MODE (void_type_node);
3055 /* A string for which we should create an IDENTIFIER_NODE at
3058 typedef struct predefined_identifier
3060 /* The name of the identifier. */
3061 const char *const name;
3062 /* The place where the IDENTIFIER_NODE should be stored. */
3064 /* Nonzero if this is the name of a constructor or destructor. */
3065 const int ctor_or_dtor_p;
3066 } predefined_identifier;
3068 /* Create all the predefined identifiers. */
3071 initialize_predefined_identifiers (void)
3073 const predefined_identifier *pid;
3075 /* A table of identifiers to create at startup. */
3076 static const predefined_identifier predefined_identifiers[] = {
3077 { "C++", &lang_name_cplusplus, 0 },
3078 { "C", &lang_name_c, 0 },
3079 { "Java", &lang_name_java, 0 },
3080 /* Some of these names have a trailing space so that it is
3081 impossible for them to conflict with names written by users. */
3082 { "__ct ", &ctor_identifier, 1 },
3083 { "__base_ctor ", &base_ctor_identifier, 1 },
3084 { "__comp_ctor ", &complete_ctor_identifier, 1 },
3085 { "__dt ", &dtor_identifier, 1 },
3086 { "__comp_dtor ", &complete_dtor_identifier, 1 },
3087 { "__base_dtor ", &base_dtor_identifier, 1 },
3088 { "__deleting_dtor ", &deleting_dtor_identifier, 1 },
3089 { IN_CHARGE_NAME, &in_charge_identifier, 0 },
3090 { "nelts", &nelts_identifier, 0 },
3091 { THIS_NAME, &this_identifier, 0 },
3092 { VTABLE_DELTA_NAME, &delta_identifier, 0 },
3093 { VTABLE_PFN_NAME, &pfn_identifier, 0 },
3094 { "_vptr", &vptr_identifier, 0 },
3095 { "__vtt_parm", &vtt_parm_identifier, 0 },
3096 { "::", &global_scope_name, 0 },
3097 { "std", &std_identifier, 0 },
3101 for (pid = predefined_identifiers; pid->name; ++pid)
3103 *pid->node = get_identifier (pid->name);
3104 if (pid->ctor_or_dtor_p)
3105 IDENTIFIER_CTOR_OR_DTOR_P (*pid->node) = 1;
3109 /* Create the predefined scalar types of C,
3110 and some nodes representing standard constants (0, 1, (void *)0).
3111 Initialize the global binding level.
3112 Make definitions for built-in primitive functions. */
3115 cxx_init_decl_processing (void)
3118 tree void_ftype_ptr;
3120 build_common_tree_nodes (flag_signed_char, false);
3122 /* Create all the identifiers we need. */
3123 initialize_predefined_identifiers ();
3125 /* Create the global variables. */
3126 push_to_top_level ();
3128 current_function_decl = NULL_TREE;
3129 current_binding_level = NULL;
3130 /* Enter the global namespace. */
3131 gcc_assert (global_namespace == NULL_TREE);
3132 global_namespace = build_lang_decl (NAMESPACE_DECL, global_scope_name,
3134 TREE_PUBLIC (global_namespace) = 1;
3135 begin_scope (sk_namespace, global_namespace);
3137 current_lang_name = NULL_TREE;
3139 /* Adjust various flags based on command-line settings. */
3140 if (!flag_permissive)
3141 flag_pedantic_errors = 1;
3142 if (!flag_no_inline)
3144 flag_inline_trees = 1;
3147 if (flag_inline_functions)
3148 flag_inline_trees = 2;
3150 /* Force minimum function alignment if using the least significant
3151 bit of function pointers to store the virtual bit. */
3152 if (TARGET_PTRMEMFUNC_VBIT_LOCATION == ptrmemfunc_vbit_in_pfn
3153 && force_align_functions_log < 1)
3154 force_align_functions_log = 1;
3157 current_lang_name = lang_name_c;
3159 /* Create the `std' namespace. */
3160 push_namespace (std_identifier);
3161 std_node = current_namespace;
3164 c_common_nodes_and_builtins ();
3166 java_byte_type_node = record_builtin_java_type ("__java_byte", 8);
3167 java_short_type_node = record_builtin_java_type ("__java_short", 16);
3168 java_int_type_node = record_builtin_java_type ("__java_int", 32);
3169 java_long_type_node = record_builtin_java_type ("__java_long", 64);
3170 java_float_type_node = record_builtin_java_type ("__java_float", -32);
3171 java_double_type_node = record_builtin_java_type ("__java_double", -64);
3172 java_char_type_node = record_builtin_java_type ("__java_char", -16);
3173 java_boolean_type_node = record_builtin_java_type ("__java_boolean", -1);
3175 integer_two_node = build_int_cst (NULL_TREE, 2);
3176 integer_three_node = build_int_cst (NULL_TREE, 3);
3178 record_builtin_type (RID_BOOL, "bool", boolean_type_node);
3179 truthvalue_type_node = boolean_type_node;
3180 truthvalue_false_node = boolean_false_node;
3181 truthvalue_true_node = boolean_true_node;
3183 empty_except_spec = build_tree_list (NULL_TREE, NULL_TREE);
3186 record_builtin_type (RID_MAX, NULL, string_type_node);
3189 delta_type_node = ptrdiff_type_node;
3190 vtable_index_type = ptrdiff_type_node;
3192 vtt_parm_type = build_pointer_type (const_ptr_type_node);
3193 void_ftype = build_function_type (void_type_node, void_list_node);
3194 void_ftype_ptr = build_function_type (void_type_node,
3195 tree_cons (NULL_TREE,
3199 = build_exception_variant (void_ftype_ptr, empty_except_spec);
3201 /* C++ extensions */
3203 unknown_type_node = make_node (UNKNOWN_TYPE);
3204 record_unknown_type (unknown_type_node, "unknown type");
3206 /* Indirecting an UNKNOWN_TYPE node yields an UNKNOWN_TYPE node. */
3207 TREE_TYPE (unknown_type_node) = unknown_type_node;
3209 /* Looking up TYPE_POINTER_TO and TYPE_REFERENCE_TO yield the same
3211 TYPE_POINTER_TO (unknown_type_node) = unknown_type_node;
3212 TYPE_REFERENCE_TO (unknown_type_node) = unknown_type_node;
3215 /* Make sure we get a unique function type, so we can give
3216 its pointer type a name. (This wins for gdb.) */
3217 tree vfunc_type = make_node (FUNCTION_TYPE);
3218 TREE_TYPE (vfunc_type) = integer_type_node;
3219 TYPE_ARG_TYPES (vfunc_type) = NULL_TREE;
3220 layout_type (vfunc_type);
3222 vtable_entry_type = build_pointer_type (vfunc_type);
3224 record_builtin_type (RID_MAX, VTBL_PTR_TYPE, vtable_entry_type);
3227 = build_cplus_array_type (vtable_entry_type, NULL_TREE);
3228 layout_type (vtbl_type_node);
3229 vtbl_type_node = build_qualified_type (vtbl_type_node, TYPE_QUAL_CONST);
3230 record_builtin_type (RID_MAX, NULL, vtbl_type_node);
3231 vtbl_ptr_type_node = build_pointer_type (vtable_entry_type);
3232 layout_type (vtbl_ptr_type_node);
3233 record_builtin_type (RID_MAX, NULL, vtbl_ptr_type_node);
3235 push_namespace (get_identifier ("__cxxabiv1"));
3236 abi_node = current_namespace;
3239 global_type_node = make_node (LANG_TYPE);
3240 record_unknown_type (global_type_node, "global type");
3243 current_lang_name = lang_name_cplusplus;
3247 tree bad_alloc_type_node;
3248 tree bad_alloc_decl;
3249 tree newtype, deltype;
3250 tree ptr_ftype_sizetype;
3252 push_namespace (std_identifier);
3253 bad_alloc_id = get_identifier ("bad_alloc");
3254 bad_alloc_type_node = make_aggr_type (RECORD_TYPE);
3255 TYPE_CONTEXT (bad_alloc_type_node) = current_namespace;
3257 = create_implicit_typedef (bad_alloc_id, bad_alloc_type_node);
3258 DECL_CONTEXT (bad_alloc_decl) = current_namespace;
3259 TYPE_STUB_DECL (bad_alloc_type_node) = bad_alloc_decl;
3263 = build_function_type (ptr_type_node,
3264 tree_cons (NULL_TREE,
3267 newtype = build_exception_variant
3268 (ptr_ftype_sizetype, add_exception_specifier
3269 (NULL_TREE, bad_alloc_type_node, -1));
3270 deltype = build_exception_variant (void_ftype_ptr, empty_except_spec);
3271 push_cp_library_fn (NEW_EXPR, newtype);
3272 push_cp_library_fn (VEC_NEW_EXPR, newtype);
3273 global_delete_fndecl = push_cp_library_fn (DELETE_EXPR, deltype);
3274 push_cp_library_fn (VEC_DELETE_EXPR, deltype);
3278 = build_library_fn_ptr ("__cxa_pure_virtual", void_ftype);
3280 /* Perform other language dependent initializations. */
3281 init_class_processing ();
3282 init_rtti_processing ();
3284 if (flag_exceptions)
3285 init_exception_processing ();
3287 if (! supports_one_only ())
3290 make_fname_decl = cp_make_fname_decl;
3291 start_fname_decls ();
3293 /* Show we use EH for cleanups. */
3294 if (flag_exceptions)
3295 using_eh_for_cleanups ();
3298 /* Generate an initializer for a function naming variable from
3299 NAME. NAME may be NULL, to indicate a dependent name. TYPE_P is
3300 filled in with the type of the init. */
3303 cp_fname_init (const char* name, tree *type_p)
3305 tree domain = NULL_TREE;
3307 tree init = NULL_TREE;
3312 length = strlen (name);
3313 domain = build_index_type (size_int (length));
3314 init = build_string (length + 1, name);
3317 type = build_qualified_type (char_type_node, TYPE_QUAL_CONST);
3318 type = build_cplus_array_type (type, domain);
3323 TREE_TYPE (init) = type;
3325 init = error_mark_node;
3330 /* Create the VAR_DECL for __FUNCTION__ etc. ID is the name to give the
3331 decl, NAME is the initialization string and TYPE_DEP indicates whether
3332 NAME depended on the type of the function. We make use of that to detect
3333 __PRETTY_FUNCTION__ inside a template fn. This is being done
3334 lazily at the point of first use, so we mustn't push the decl now. */
3337 cp_make_fname_decl (tree id, int type_dep)
3339 const char *const name = (type_dep && processing_template_decl
3340 ? NULL : fname_as_string (type_dep));
3342 tree init = cp_fname_init (name, &type);
3343 tree decl = build_decl (VAR_DECL, id, type);
3346 free ((char *) name);
3348 /* As we're using pushdecl_with_scope, we must set the context. */
3349 DECL_CONTEXT (decl) = current_function_decl;
3350 DECL_PRETTY_FUNCTION_P (decl) = type_dep;
3352 TREE_STATIC (decl) = 1;
3353 TREE_READONLY (decl) = 1;
3354 DECL_ARTIFICIAL (decl) = 1;
3356 TREE_USED (decl) = 1;
3358 if (current_function_decl)
3360 struct cp_binding_level *b = current_binding_level;
3361 while (b->level_chain->kind != sk_function_parms)
3363 pushdecl_with_scope (decl, b, /*is_friend=*/false);
3364 cp_finish_decl (decl, init, /*init_const_expr_p=*/false, NULL_TREE,
3365 LOOKUP_ONLYCONVERTING);
3368 pushdecl_top_level_and_finish (decl, init);
3373 /* Make a definition for a builtin function named NAME in the current
3374 namespace, whose data type is TYPE and whose context is CONTEXT.
3375 TYPE should be a function type with argument types.
3377 CLASS and CODE tell later passes how to compile calls to this function.
3378 See tree.h for possible values.
3380 If LIBNAME is nonzero, use that for DECL_ASSEMBLER_NAME,
3381 the name to be called if we can't opencode the function.
3382 If ATTRS is nonzero, use that for the function's attribute
3386 builtin_function_1 (const char* name,
3389 enum built_in_function code,
3390 enum built_in_class class,
3391 const char* libname,
3394 tree decl = build_library_fn_1 (get_identifier (name), ERROR_MARK, type);
3395 DECL_BUILT_IN_CLASS (decl) = class;
3396 DECL_FUNCTION_CODE (decl) = code;
3397 DECL_CONTEXT (decl) = context;
3401 /* Since `pushdecl' relies on DECL_ASSEMBLER_NAME instead of DECL_NAME,
3402 we cannot change DECL_ASSEMBLER_NAME until we have installed this
3403 function in the namespace. */
3405 SET_DECL_ASSEMBLER_NAME (decl, get_identifier (libname));
3407 /* A function in the user's namespace should have an explicit
3408 declaration before it is used. Mark the built-in function as
3409 anticipated but not actually declared. */
3410 if (name[0] != '_' || name[1] != '_')
3411 DECL_ANTICIPATED (decl) = 1;
3413 /* Possibly apply some default attributes to this built-in function. */
3415 decl_attributes (&decl, attrs, ATTR_FLAG_BUILT_IN);
3417 decl_attributes (&decl, NULL_TREE, 0);
3422 /* Entry point for the benefit of c_common_nodes_and_builtins.
3424 Make a definition for a builtin function named NAME and whose data type
3425 is TYPE. TYPE should be a function type with argument types. This
3426 function places the anticipated declaration in the global namespace
3427 and additionally in the std namespace if appropriate.
3429 CLASS and CODE tell later passes how to compile calls to this function.
3430 See tree.h for possible values.
3432 If LIBNAME is nonzero, use that for DECL_ASSEMBLER_NAME,
3433 the name to be called if we can't opencode the function.
3435 If ATTRS is nonzero, use that for the function's attribute
3439 builtin_function (const char* name,
3442 enum built_in_class cl,
3443 const char* libname,
3446 /* All builtins that don't begin with an '_' should additionally
3447 go in the 'std' namespace. */
3450 push_namespace (std_identifier);
3451 builtin_function_1 (name, type, std_node, code, cl, libname, attrs);
3455 return builtin_function_1 (name, type, NULL_TREE, code,
3456 cl, libname, attrs);
3459 /* Generate a FUNCTION_DECL with the typical flags for a runtime library
3460 function. Not called directly. */
3463 build_library_fn_1 (tree name, enum tree_code operator_code, tree type)
3465 tree fn = build_lang_decl (FUNCTION_DECL, name, type);
3466 DECL_EXTERNAL (fn) = 1;
3467 TREE_PUBLIC (fn) = 1;
3468 DECL_ARTIFICIAL (fn) = 1;
3469 SET_OVERLOADED_OPERATOR_CODE (fn, operator_code);
3470 SET_DECL_LANGUAGE (fn, lang_c);
3471 /* Runtime library routines are, by definition, available in an
3472 external shared object. */
3473 DECL_VISIBILITY (fn) = VISIBILITY_DEFAULT;
3474 DECL_VISIBILITY_SPECIFIED (fn) = 1;
3478 /* Returns the _DECL for a library function with C linkage.
3479 We assume that such functions never throw; if this is incorrect,
3480 callers should unset TREE_NOTHROW. */
3483 build_library_fn (tree name, tree type)
3485 tree fn = build_library_fn_1 (name, ERROR_MARK, type);
3486 TREE_NOTHROW (fn) = 1;
3490 /* Returns the _DECL for a library function with C++ linkage. */
3493 build_cp_library_fn (tree name, enum tree_code operator_code, tree type)
3495 tree fn = build_library_fn_1 (name, operator_code, type);
3496 TREE_NOTHROW (fn) = TYPE_NOTHROW_P (type);
3497 DECL_CONTEXT (fn) = FROB_CONTEXT (current_namespace);
3498 SET_DECL_LANGUAGE (fn, lang_cplusplus);
3502 /* Like build_library_fn, but takes a C string instead of an
3506 build_library_fn_ptr (const char* name, tree type)
3508 return build_library_fn (get_identifier (name), type);
3511 /* Like build_cp_library_fn, but takes a C string instead of an
3515 build_cp_library_fn_ptr (const char* name, tree type)
3517 return build_cp_library_fn (get_identifier (name), ERROR_MARK, type);
3520 /* Like build_library_fn, but also pushes the function so that we will
3521 be able to find it via IDENTIFIER_GLOBAL_VALUE. */
3524 push_library_fn (tree name, tree type)
3526 tree fn = build_library_fn (name, type);
3527 pushdecl_top_level (fn);
3531 /* Like build_cp_library_fn, but also pushes the function so that it
3532 will be found by normal lookup. */
3535 push_cp_library_fn (enum tree_code operator_code, tree type)
3537 tree fn = build_cp_library_fn (ansi_opname (operator_code),
3544 /* Like push_library_fn, but takes a TREE_LIST of parm types rather than
3548 push_void_library_fn (tree name, tree parmtypes)
3550 tree type = build_function_type (void_type_node, parmtypes);
3551 return push_library_fn (name, type);
3554 /* Like push_library_fn, but also note that this function throws
3555 and does not return. Used for __throw_foo and the like. */
3558 push_throw_library_fn (tree name, tree type)
3560 tree fn = push_library_fn (name, type);
3561 TREE_THIS_VOLATILE (fn) = 1;
3562 TREE_NOTHROW (fn) = 0;
3566 /* When we call finish_struct for an anonymous union, we create
3567 default copy constructors and such. But, an anonymous union
3568 shouldn't have such things; this function undoes the damage to the
3569 anonymous union type T.
3571 (The reason that we create the synthesized methods is that we don't
3572 distinguish `union { int i; }' from `typedef union { int i; } U'.
3573 The first is an anonymous union; the second is just an ordinary
3577 fixup_anonymous_aggr (tree t)
3581 /* Wipe out memory of synthesized methods. */
3582 TYPE_HAS_CONSTRUCTOR (t) = 0;
3583 TYPE_HAS_DEFAULT_CONSTRUCTOR (t) = 0;
3584 TYPE_HAS_INIT_REF (t) = 0;
3585 TYPE_HAS_CONST_INIT_REF (t) = 0;
3586 TYPE_HAS_ASSIGN_REF (t) = 0;
3587 TYPE_HAS_CONST_ASSIGN_REF (t) = 0;
3589 /* Splice the implicitly generated functions out of the TYPE_METHODS
3591 q = &TYPE_METHODS (t);
3594 if (DECL_ARTIFICIAL (*q))
3595 *q = TREE_CHAIN (*q);
3597 q = &TREE_CHAIN (*q);
3600 /* ISO C++ 9.5.3. Anonymous unions may not have function members. */
3601 if (TYPE_METHODS (t))
3602 error ("%Jan anonymous union cannot have function members",
3603 TYPE_MAIN_DECL (t));
3605 /* Anonymous aggregates cannot have fields with ctors, dtors or complex
3606 assignment operators (because they cannot have these methods themselves).
3607 For anonymous unions this is already checked because they are not allowed
3608 in any union, otherwise we have to check it. */
3609 if (TREE_CODE (t) != UNION_TYPE)
3613 for (field = TYPE_FIELDS (t); field; field = TREE_CHAIN (field))
3614 if (TREE_CODE (field) == FIELD_DECL)
3616 type = TREE_TYPE (field);
3617 if (CLASS_TYPE_P (type))
3619 if (TYPE_NEEDS_CONSTRUCTING (type))
3620 error ("member %q+#D with constructor not allowed "
3621 "in anonymous aggregate", field);
3622 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type))
3623 error ("member %q+#D with destructor not allowed "
3624 "in anonymous aggregate", field);
3625 if (TYPE_HAS_COMPLEX_ASSIGN_REF (type))
3626 error ("member %q+#D with copy assignment operator "
3627 "not allowed in anonymous aggregate", field);
3633 /* Make sure that a declaration with no declarator is well-formed, i.e.
3634 just declares a tagged type or anonymous union.
3636 Returns the type declared; or NULL_TREE if none. */
3639 check_tag_decl (cp_decl_specifier_seq *declspecs)
3641 int saw_friend = declspecs->specs[(int)ds_friend] != 0;
3642 int saw_typedef = declspecs->specs[(int)ds_typedef] != 0;
3643 /* If a class, struct, or enum type is declared by the DECLSPECS
3644 (i.e, if a class-specifier, enum-specifier, or non-typename
3645 elaborated-type-specifier appears in the DECLSPECS),
3646 DECLARED_TYPE is set to the corresponding type. */
3647 tree declared_type = NULL_TREE;
3648 bool error_p = false;
3650 if (declspecs->multiple_types_p)
3651 error ("multiple types in one declaration");
3652 else if (declspecs->redefined_builtin_type)
3654 if (!in_system_header)
3655 pedwarn ("redeclaration of C++ built-in type %qT",
3656 declspecs->redefined_builtin_type);
3661 && TYPE_P (declspecs->type)
3662 && ((TREE_CODE (declspecs->type) != TYPENAME_TYPE
3663 && IS_AGGR_TYPE (declspecs->type))
3664 || TREE_CODE (declspecs->type) == ENUMERAL_TYPE))
3665 declared_type = declspecs->type;
3666 else if (declspecs->type == error_mark_node)
3668 if (declared_type == NULL_TREE && ! saw_friend && !error_p)
3669 pedwarn ("declaration does not declare anything");
3670 /* Check for an anonymous union. */
3671 else if (declared_type && IS_AGGR_TYPE_CODE (TREE_CODE (declared_type))
3672 && TYPE_ANONYMOUS_P (declared_type))
3674 /* 7/3 In a simple-declaration, the optional init-declarator-list
3675 can be omitted only when declaring a class (clause 9) or
3676 enumeration (7.2), that is, when the decl-specifier-seq contains
3677 either a class-specifier, an elaborated-type-specifier with
3678 a class-key (9.1), or an enum-specifier. In these cases and
3679 whenever a class-specifier or enum-specifier is present in the
3680 decl-specifier-seq, the identifiers in these specifiers are among
3681 the names being declared by the declaration (as class-name,
3682 enum-names, or enumerators, depending on the syntax). In such
3683 cases, and except for the declaration of an unnamed bit-field (9.6),
3684 the decl-specifier-seq shall introduce one or more names into the
3685 program, or shall redeclare a name introduced by a previous
3686 declaration. [Example:
3687 enum { }; // ill-formed
3688 typedef class { }; // ill-formed
3692 error ("missing type-name in typedef-declaration");
3695 /* Anonymous unions are objects, so they can have specifiers. */;
3696 SET_ANON_AGGR_TYPE_P (declared_type);
3698 if (TREE_CODE (declared_type) != UNION_TYPE && pedantic
3699 && !in_system_header)
3700 pedwarn ("ISO C++ prohibits anonymous structs");
3705 if (declspecs->specs[(int)ds_inline]
3706 || declspecs->specs[(int)ds_virtual])
3707 error ("%qs can only be specified for functions",
3708 declspecs->specs[(int)ds_inline]
3709 ? "inline" : "virtual");
3711 && (!current_class_type
3712 || current_scope () != current_class_type))
3713 error ("%<friend%> can only be specified inside a class");
3714 else if (declspecs->specs[(int)ds_explicit])
3715 error ("%<explicit%> can only be specified for constructors");
3716 else if (declspecs->storage_class)
3717 error ("a storage class can only be specified for objects "
3719 else if (declspecs->specs[(int)ds_const]
3720 || declspecs->specs[(int)ds_volatile]
3721 || declspecs->specs[(int)ds_restrict]
3722 || declspecs->specs[(int)ds_thread])
3723 error ("qualifiers can only be specified for objects "
3727 return declared_type;
3730 /* Called when a declaration is seen that contains no names to declare.
3731 If its type is a reference to a structure, union or enum inherited
3732 from a containing scope, shadow that tag name for the current scope
3733 with a forward reference.
3734 If its type defines a new named structure or union
3735 or defines an enum, it is valid but we need not do anything here.
3736 Otherwise, it is an error.
3738 C++: may have to grok the declspecs to learn about static,
3739 complain for anonymous unions.
3741 Returns the TYPE declared -- or NULL_TREE if none. */
3744 shadow_tag (cp_decl_specifier_seq *declspecs)
3746 tree t = check_tag_decl (declspecs);
3751 if (declspecs->attributes)
3753 warning (0, "attribute ignored in declaration of %q+#T", t);
3754 warning (0, "attribute for %q+#T must follow the %qs keyword",
3755 t, class_key_or_enum_as_string (t));
3759 maybe_process_partial_specialization (t);
3761 /* This is where the variables in an anonymous union are
3762 declared. An anonymous union declaration looks like:
3764 because there is no declarator after the union, the parser
3765 sends that declaration here. */
3766 if (ANON_AGGR_TYPE_P (t))
3768 fixup_anonymous_aggr (t);
3770 if (TYPE_FIELDS (t))
3772 tree decl = grokdeclarator (/*declarator=*/NULL,
3773 declspecs, NORMAL, 0, NULL);
3774 finish_anon_union (decl);
3781 /* Decode a "typename", such as "int **", returning a ..._TYPE node. */
3784 groktypename (cp_decl_specifier_seq *type_specifiers,
3785 const cp_declarator *declarator)
3789 attrs = type_specifiers->attributes;
3790 type_specifiers->attributes = NULL_TREE;
3791 type = grokdeclarator (declarator, type_specifiers, TYPENAME, 0, &attrs);
3793 cplus_decl_attributes (&type, attrs, 0);
3797 /* Decode a declarator in an ordinary declaration or data definition.
3798 This is called as soon as the type information and variable name
3799 have been parsed, before parsing the initializer if any.
3800 Here we create the ..._DECL node, fill in its type,
3801 and put it on the list of decls for the current context.
3802 The ..._DECL node is returned as the value.
3804 Exception: for arrays where the length is not specified,
3805 the type is left null, to be filled in by `cp_finish_decl'.
3807 Function definitions do not come here; they go to start_function
3808 instead. However, external and forward declarations of functions
3809 do go through here. Structure field declarations are done by
3810 grokfield and not through here. */
3813 start_decl (const cp_declarator *declarator,
3814 cp_decl_specifier_seq *declspecs,
3817 tree prefix_attributes,
3818 tree *pushed_scope_p)
3824 *pushed_scope_p = NULL_TREE;
3826 /* An object declared as __attribute__((deprecated)) suppresses
3827 warnings of uses of other deprecated items. */
3828 if (lookup_attribute ("deprecated", attributes))
3829 deprecated_state = DEPRECATED_SUPPRESS;
3831 attributes = chainon (attributes, prefix_attributes);
3833 decl = grokdeclarator (declarator, declspecs, NORMAL, initialized,
3836 deprecated_state = DEPRECATED_NORMAL;
3838 if (decl == NULL_TREE || TREE_CODE (decl) == VOID_TYPE
3839 || decl == error_mark_node)
3840 return error_mark_node;
3842 type = TREE_TYPE (decl);
3844 context = DECL_CONTEXT (decl);
3848 *pushed_scope_p = push_scope (context);
3850 /* We are only interested in class contexts, later. */
3851 if (TREE_CODE (context) == NAMESPACE_DECL)
3852 context = NULL_TREE;
3856 /* Is it valid for this decl to have an initializer at all?
3857 If not, set INITIALIZED to zero, which will indirectly
3858 tell `cp_finish_decl' to ignore the initializer once it is parsed. */
3859 switch (TREE_CODE (decl))
3862 error ("typedef %qD is initialized (use __typeof__ instead)", decl);
3863 return error_mark_node;
3866 error ("function %q#D is initialized like a variable", decl);
3876 if (! toplevel_bindings_p ()
3877 && DECL_EXTERNAL (decl))
3878 warning (0, "declaration of %q#D has %<extern%> and is initialized",
3880 DECL_EXTERNAL (decl) = 0;
3881 if (toplevel_bindings_p ())
3882 TREE_STATIC (decl) = 1;
3885 /* Set attributes here so if duplicate decl, will have proper attributes. */
3886 cplus_decl_attributes (&decl, attributes, 0);
3888 /* Dllimported symbols cannot be defined. Static data members (which
3889 can be initialized in-class and dllimported) go through grokfield,
3890 not here, so we don't need to exclude those decls when checking for
3892 if (initialized && DECL_DLLIMPORT_P (decl))
3894 error ("definition of %q#D is marked %<dllimport%>", decl);
3895 DECL_DLLIMPORT_P (decl) = 0;
3898 /* If #pragma weak was used, mark the decl weak now. */
3899 maybe_apply_pragma_weak (decl);
3901 if (TREE_CODE (decl) == FUNCTION_DECL
3902 && DECL_DECLARED_INLINE_P (decl)
3903 && DECL_UNINLINABLE (decl)
3904 && lookup_attribute ("noinline", DECL_ATTRIBUTES (decl)))
3905 warning (0, "inline function %q+D given attribute noinline", decl);
3907 if (context && COMPLETE_TYPE_P (complete_type (context)))
3909 if (TREE_CODE (decl) == VAR_DECL)
3911 tree field = lookup_field (context, DECL_NAME (decl), 0, false);
3912 if (field == NULL_TREE || TREE_CODE (field) != VAR_DECL)
3913 error ("%q#D is not a static member of %q#T", decl, context);
3916 if (DECL_CONTEXT (field) != context)
3918 if (!same_type_p (DECL_CONTEXT (field), context))
3919 pedwarn ("ISO C++ does not permit %<%T::%D%> "
3920 "to be defined as %<%T::%D%>",
3921 DECL_CONTEXT (field), DECL_NAME (decl),
3922 context, DECL_NAME (decl));
3923 DECL_CONTEXT (decl) = DECL_CONTEXT (field);
3925 if (processing_specialization
3926 && template_class_depth (context) == 0
3927 && CLASSTYPE_TEMPLATE_SPECIALIZATION (context))
3928 error ("template header not allowed in member definition "
3929 "of explicitly specialized class");
3930 /* Static data member are tricky; an in-class initialization
3931 still doesn't provide a definition, so the in-class
3932 declaration will have DECL_EXTERNAL set, but will have an
3933 initialization. Thus, duplicate_decls won't warn
3934 about this situation, and so we check here. */
3935 if (initialized && DECL_INITIALIZED_IN_CLASS_P (field))
3936 error ("duplicate initialization of %qD", decl);
3937 if (duplicate_decls (decl, field, /*newdecl_is_friend=*/false))
3943 tree field = check_classfn (context, decl,
3944 (processing_template_decl
3945 > template_class_depth (context))
3946 ? current_template_parms
3948 if (field && duplicate_decls (decl, field,
3949 /*newdecl_is_friend=*/false))
3953 /* cp_finish_decl sets DECL_EXTERNAL if DECL_IN_AGGR_P is set. */
3954 DECL_IN_AGGR_P (decl) = 0;
3955 /* Do not mark DECL as an explicit specialization if it was not
3956 already marked as an instantiation; a declaration should
3957 never be marked as a specialization unless we know what
3958 template is being specialized. */
3959 if (DECL_LANG_SPECIFIC (decl) && DECL_USE_TEMPLATE (decl))
3961 SET_DECL_TEMPLATE_SPECIALIZATION (decl);
3963 /* [temp.expl.spec] An explicit specialization of a static data
3964 member of a template is a definition if the declaration
3965 includes an initializer; otherwise, it is a declaration.
3967 We check for processing_specialization so this only applies
3968 to the new specialization syntax. */
3969 if (!initialized && processing_specialization)
3970 DECL_EXTERNAL (decl) = 1;
3973 if (DECL_EXTERNAL (decl) && ! DECL_TEMPLATE_SPECIALIZATION (decl))
3974 pedwarn ("declaration of %q#D outside of class is not definition",
3978 /* Enter this declaration into the symbol table. */
3979 tem = maybe_push_decl (decl);
3981 if (processing_template_decl)
3982 tem = push_template_decl (tem);
3983 if (tem == error_mark_node)
3984 return error_mark_node;
3986 /* Tell the back-end to use or not use .common as appropriate. If we say
3987 -fconserve-space, we want this to save .data space, at the expense of
3988 wrong semantics. If we say -fno-conserve-space, we want this to
3989 produce errors about redefs; to do this we force variables into the
3991 if (flag_conserve_space
3992 && TREE_CODE (tem) == VAR_DECL
3993 && TREE_PUBLIC (tem)
3994 && !DECL_THREAD_LOCAL_P (tem)
3995 && !have_global_bss_p ())
3996 DECL_COMMON (tem) = 1;
3998 if (!processing_template_decl && TREE_CODE (tem) == VAR_DECL)
3999 start_decl_1 (tem, initialized);
4005 start_decl_1 (tree decl, bool initialized)
4009 gcc_assert (!processing_template_decl);
4011 if (error_operand_p (decl))
4014 gcc_assert (TREE_CODE (decl) == VAR_DECL);
4015 type = TREE_TYPE (decl);
4018 /* Is it valid for this decl to have an initializer at all?
4019 If not, set INITIALIZED to zero, which will indirectly
4020 tell `cp_finish_decl' to ignore the initializer once it is parsed. */
4022 /* Don't allow initializations for incomplete types except for
4023 arrays which might be completed by the initialization. */
4024 if (COMPLETE_TYPE_P (complete_type (type)))
4025 ; /* A complete type is ok. */
4026 else if (TREE_CODE (type) != ARRAY_TYPE)
4028 error ("variable %q#D has initializer but incomplete type", decl);
4030 type = TREE_TYPE (decl) = error_mark_node;
4032 else if (!COMPLETE_TYPE_P (complete_type (TREE_TYPE (type))))
4034 if (DECL_LANG_SPECIFIC (decl) && DECL_TEMPLATE_INFO (decl))
4035 error ("elements of array %q#D have incomplete type", decl);
4036 /* else we already gave an error in start_decl. */
4040 else if (IS_AGGR_TYPE (type)
4041 && ! DECL_EXTERNAL (decl))
4043 if (!COMPLETE_TYPE_P (complete_type (type)))
4045 error ("aggregate %q#D has incomplete type and cannot be defined",
4047 /* Change the type so that assemble_variable will give
4048 DECL an rtl we can live with: (mem (const_int 0)). */
4049 type = TREE_TYPE (decl) = error_mark_node;
4053 /* If any base type in the hierarchy of TYPE needs a constructor,
4054 then we set initialized to 1. This way any nodes which are
4055 created for the purposes of initializing this aggregate
4056 will live as long as it does. This is necessary for global
4057 aggregates which do not have their initializers processed until
4058 the end of the file. */
4059 initialized = TYPE_NEEDS_CONSTRUCTING (type);
4063 /* Create a new scope to hold this declaration if necessary.
4064 Whether or not a new scope is necessary cannot be determined
4065 until after the type has been completed; if the type is a
4066 specialization of a class template it is not until after
4067 instantiation has occurred that TYPE_HAS_NONTRIVIAL_DESTRUCTOR
4068 will be set correctly. */
4069 maybe_push_cleanup_level (type);
4072 /* Handle initialization of references. DECL, TYPE, and INIT have the
4073 same meaning as in cp_finish_decl. *CLEANUP must be NULL on entry,
4074 but will be set to a new CLEANUP_STMT if a temporary is created
4075 that must be destroyed subsequently.
4077 Returns an initializer expression to use to initialize DECL, or
4078 NULL if the initialization can be performed statically.
4080 Quotes on semantics can be found in ARM 8.4.3. */
4083 grok_reference_init (tree decl, tree type, tree init, tree *cleanup)
4087 if (init == NULL_TREE)
4089 if ((DECL_LANG_SPECIFIC (decl) == 0
4090 || DECL_IN_AGGR_P (decl) == 0)
4091 && ! DECL_THIS_EXTERN (decl))
4092 error ("%qD declared as reference but not initialized", decl);
4096 if (TREE_CODE (init) == CONSTRUCTOR)
4098 error ("ISO C++ forbids use of initializer list to "
4099 "initialize reference %qD", decl);
4103 if (TREE_CODE (init) == TREE_LIST)
4104 init = build_x_compound_expr_from_list (init, "initializer");
4106 if (TREE_CODE (TREE_TYPE (type)) != ARRAY_TYPE
4107 && TREE_CODE (TREE_TYPE (init)) == ARRAY_TYPE)
4108 /* Note: default conversion is only called in very special cases. */
4109 init = decay_conversion (init);
4111 /* Convert INIT to the reference type TYPE. This may involve the
4112 creation of a temporary, whose lifetime must be the same as that
4113 of the reference. If so, a DECL_EXPR for the temporary will be
4114 added just after the DECL_EXPR for DECL. That's why we don't set
4115 DECL_INITIAL for local references (instead assigning to them
4116 explicitly); we need to allow the temporary to be initialized
4118 tmp = initialize_reference (type, init, decl, cleanup);
4120 if (tmp == error_mark_node)
4122 else if (tmp == NULL_TREE)
4124 error ("cannot initialize %qT from %qT", type, TREE_TYPE (init));
4128 if (TREE_STATIC (decl) && !TREE_CONSTANT (tmp))
4131 DECL_INITIAL (decl) = tmp;
4136 /* When parsing `int a[] = {1, 2};' we don't know the size of the
4137 array until we finish parsing the initializer. If that's the
4138 situation we're in, update DECL accordingly. */
4141 maybe_deduce_size_from_array_init (tree decl, tree init)
4143 tree type = TREE_TYPE (decl);
4145 if (TREE_CODE (type) == ARRAY_TYPE
4146 && TYPE_DOMAIN (type) == NULL_TREE
4147 && TREE_CODE (decl) != TYPE_DECL)
4149 /* do_default is really a C-ism to deal with tentative definitions.
4150 But let's leave it here to ease the eventual merge. */
4151 int do_default = !DECL_EXTERNAL (decl);
4152 tree initializer = init ? init : DECL_INITIAL (decl);
4153 int failure = cp_complete_array_type (&TREE_TYPE (decl), initializer,
4158 error ("initializer fails to determine size of %qD", decl);
4159 TREE_TYPE (decl) = error_mark_node;
4161 else if (failure == 2)
4165 error ("array size missing in %qD", decl);
4166 TREE_TYPE (decl) = error_mark_node;
4168 /* If a `static' var's size isn't known, make it extern as
4169 well as static, so it does not get allocated. If it's not
4170 `static', then don't mark it extern; finish_incomplete_decl
4171 will give it a default size and it will get allocated. */
4172 else if (!pedantic && TREE_STATIC (decl) && !TREE_PUBLIC (decl))
4173 DECL_EXTERNAL (decl) = 1;
4175 else if (failure == 3)
4177 error ("zero-size array %qD", decl);
4178 TREE_TYPE (decl) = error_mark_node;
4181 cp_apply_type_quals_to_decl (cp_type_quals (TREE_TYPE (decl)), decl);
4183 layout_decl (decl, 0);
4187 /* Set DECL_SIZE, DECL_ALIGN, etc. for DECL (a VAR_DECL), and issue
4188 any appropriate error messages regarding the layout. */
4191 layout_var_decl (tree decl)
4195 type = TREE_TYPE (decl);
4196 if (type == error_mark_node)
4199 /* If we haven't already layed out this declaration, do so now.
4200 Note that we must not call complete type for an external object
4201 because it's type might involve templates that we are not
4202 supposed to instantiate yet. (And it's perfectly valid to say
4203 `extern X x' for some incomplete type `X'.) */
4204 if (!DECL_EXTERNAL (decl))
4205 complete_type (type);
4206 if (!DECL_SIZE (decl)
4207 && TREE_TYPE (decl) != error_mark_node
4208 && (COMPLETE_TYPE_P (type)
4209 || (TREE_CODE (type) == ARRAY_TYPE
4210 && !TYPE_DOMAIN (type)
4211 && COMPLETE_TYPE_P (TREE_TYPE (type)))))
4212 layout_decl (decl, 0);
4214 if (!DECL_EXTERNAL (decl) && DECL_SIZE (decl) == NULL_TREE)
4216 /* An automatic variable with an incomplete type: that is an error.
4217 Don't talk about array types here, since we took care of that
4218 message in grokdeclarator. */
4219 error ("storage size of %qD isn't known", decl);
4220 TREE_TYPE (decl) = error_mark_node;
4223 /* Keep this code around in case we later want to control debug info
4224 based on whether a type is "used". (jason 1999-11-11) */
4226 else if (!DECL_EXTERNAL (decl) && IS_AGGR_TYPE (ttype))
4227 /* Let debugger know it should output info for this type. */
4228 note_debug_info_needed (ttype);
4230 if (TREE_STATIC (decl) && DECL_CLASS_SCOPE_P (decl))
4231 note_debug_info_needed (DECL_CONTEXT (decl));
4234 if ((DECL_EXTERNAL (decl) || TREE_STATIC (decl))
4235 && DECL_SIZE (decl) != NULL_TREE
4236 && ! TREE_CONSTANT (DECL_SIZE (decl)))
4238 if (TREE_CODE (DECL_SIZE (decl)) == INTEGER_CST)
4239 constant_expression_warning (DECL_SIZE (decl));
4241 error ("storage size of %qD isn't constant", decl);
4245 /* If a local static variable is declared in an inline function, or if
4246 we have a weak definition, we must endeavor to create only one
4247 instance of the variable at link-time. */
4250 maybe_commonize_var (tree decl)
4252 /* Static data in a function with comdat linkage also has comdat
4254 if (TREE_STATIC (decl)
4255 /* Don't mess with __FUNCTION__. */
4256 && ! DECL_ARTIFICIAL (decl)
4257 && DECL_FUNCTION_SCOPE_P (decl)
4258 /* Unfortunately, import_export_decl has not always been called
4259 before the function is processed, so we cannot simply check
4261 && (DECL_COMDAT (DECL_CONTEXT (decl))
4262 || ((DECL_DECLARED_INLINE_P (DECL_CONTEXT (decl))
4263 || DECL_TEMPLATE_INSTANTIATION (DECL_CONTEXT (decl)))
4264 && TREE_PUBLIC (DECL_CONTEXT (decl)))))
4268 /* With weak symbols, we simply make the variable COMDAT;
4269 that will cause copies in multiple translations units to
4271 comdat_linkage (decl);
4275 if (DECL_INITIAL (decl) == NULL_TREE
4276 || DECL_INITIAL (decl) == error_mark_node)
4278 /* Without weak symbols, we can use COMMON to merge
4279 uninitialized variables. */
4280 TREE_PUBLIC (decl) = 1;
4281 DECL_COMMON (decl) = 1;
4285 /* While for initialized variables, we must use internal
4286 linkage -- which means that multiple copies will not
4288 TREE_PUBLIC (decl) = 0;
4289 DECL_COMMON (decl) = 0;
4290 warning (0, "sorry: semantics of inline function static "
4291 "data %q+#D are wrong (you'll wind up "
4292 "with multiple copies)", decl);
4293 warning (0, "%J you can work around this by removing "
4299 else if (DECL_LANG_SPECIFIC (decl) && DECL_COMDAT (decl))
4300 /* Set it up again; we might have set DECL_INITIAL since the last
4302 comdat_linkage (decl);
4305 /* Issue an error message if DECL is an uninitialized const variable. */
4308 check_for_uninitialized_const_var (tree decl)
4310 tree type = TREE_TYPE (decl);
4312 /* ``Unless explicitly declared extern, a const object does not have
4313 external linkage and must be initialized. ($8.4; $12.1)'' ARM
4315 if (TREE_CODE (decl) == VAR_DECL
4316 && TREE_CODE (type) != REFERENCE_TYPE
4317 && CP_TYPE_CONST_P (type)
4318 && !TYPE_NEEDS_CONSTRUCTING (type)
4319 && !DECL_INITIAL (decl))
4320 error ("uninitialized const %qD", decl);
4324 /* Structure holding the current initializer being processed by reshape_init.
4325 CUR is a pointer to the current element being processed, END is a pointer
4326 after the last element present in the initializer. */
4327 typedef struct reshape_iterator_t
4329 constructor_elt *cur;
4330 constructor_elt *end;
4333 static tree reshape_init_r (tree, reshape_iter *, bool);
4335 /* FIELD is a FIELD_DECL or NULL. In the former case, the value
4336 returned is the next FIELD_DECL (possibly FIELD itself) that can be
4337 initialized. If there are no more such fields, the return value
4341 next_initializable_field (tree field)
4344 && (TREE_CODE (field) != FIELD_DECL
4345 || (DECL_C_BIT_FIELD (field) && !DECL_NAME (field))
4346 || DECL_ARTIFICIAL (field)))
4347 field = TREE_CHAIN (field);
4352 /* Subroutine of reshape_init_array and reshape_init_vector, which does
4353 the actual work. ELT_TYPE is the element type of the array. MAX_INDEX is an
4354 INTEGER_CST representing the size of the array minus one (the maximum index),
4355 or NULL_TREE if the array was declared without specifying the size. D is
4356 the iterator within the constructor. */
4359 reshape_init_array_1 (tree elt_type, tree max_index, reshape_iter *d)
4362 bool sized_array_p = (max_index != NULL_TREE);
4363 unsigned HOST_WIDE_INT max_index_cst = 0;
4364 unsigned HOST_WIDE_INT index;
4366 /* The initializer for an array is always a CONSTRUCTOR. */
4367 new_init = build_constructor (NULL_TREE, NULL);
4371 /* Minus 1 is used for zero sized arrays. */
4372 if (integer_all_onesp (max_index))
4375 if (host_integerp (max_index, 1))
4376 max_index_cst = tree_low_cst (max_index, 1);
4377 /* sizetype is sign extended, not zero extended. */
4379 max_index_cst = tree_low_cst (fold_convert (size_type_node, max_index),
4383 /* Loop until there are no more initializers. */
4385 d->cur != d->end && (!sized_array_p || index <= max_index_cst);
4392 /* Handle array designated initializers (GNU extension). */
4393 if (TREE_CODE (d->cur->index) == IDENTIFIER_NODE)
4395 error ("name %qD used in a GNU-style designated "
4396 "initializer for an array", d->cur->index);
4402 elt_init = reshape_init_r (elt_type, d, /*first_initializer_p=*/false);
4403 if (elt_init == error_mark_node)
4404 return error_mark_node;
4405 CONSTRUCTOR_APPEND_ELT (CONSTRUCTOR_ELTS (new_init), NULL_TREE, elt_init);
4411 /* Subroutine of reshape_init_r, processes the initializers for arrays.
4412 Parameters are the same of reshape_init_r. */
4415 reshape_init_array (tree type, reshape_iter *d)
4417 tree max_index = NULL_TREE;
4419 gcc_assert (TREE_CODE (type) == ARRAY_TYPE);
4421 if (TYPE_DOMAIN (type))
4422 max_index = array_type_nelts (type);
4424 return reshape_init_array_1 (TREE_TYPE (type), max_index, d);
4427 /* Subroutine of reshape_init_r, processes the initializers for vectors.
4428 Parameters are the same of reshape_init_r. */
4431 reshape_init_vector (tree type, reshape_iter *d)
4433 tree max_index = NULL_TREE;
4436 gcc_assert (TREE_CODE (type) == VECTOR_TYPE);
4438 if (COMPOUND_LITERAL_P (d->cur->value))
4440 tree value = d->cur->value;
4441 if (!same_type_p (TREE_TYPE (value), type))
4443 error ("invalid type %qT as initializer for a vector of type %qT",
4444 TREE_TYPE (d->cur->value), type);
4445 value = error_mark_node;
4451 /* For a vector, the representation type is a struct
4452 containing a single member which is an array of the
4453 appropriate size. */
4454 rtype = TYPE_DEBUG_REPRESENTATION_TYPE (type);
4455 if (rtype && TYPE_DOMAIN (TREE_TYPE (TYPE_FIELDS (rtype))))
4456 max_index = array_type_nelts (TREE_TYPE (TYPE_FIELDS (rtype)));
4458 return reshape_init_array_1 (TREE_TYPE (type), max_index, d);
4461 /* Subroutine of reshape_init_r, processes the initializers for classes
4462 or union. Parameters are the same of reshape_init_r. */
4465 reshape_init_class (tree type, reshape_iter *d, bool first_initializer_p)
4470 gcc_assert (CLASS_TYPE_P (type));
4472 /* The initializer for a class is always a CONSTRUCTOR. */
4473 new_init = build_constructor (NULL_TREE, NULL);
4474 field = next_initializable_field (TYPE_FIELDS (type));
4480 An initializer for an aggregate member that is an
4481 empty class shall have the form of an empty
4482 initializer-list {}. */
4483 if (!first_initializer_p)
4485 error ("initializer for %qT must be brace-enclosed", type);
4486 return error_mark_node;
4491 /* Loop through the initializable fields, gathering initializers. */
4492 while (d->cur != d->end)
4496 /* Handle designated initializers, as an extension. */
4500 pedwarn ("ISO C++ does not allow designated initializers");
4502 field = lookup_field_1 (type, d->cur->index, /*want_type=*/false);
4504 if (!field || TREE_CODE (field) != FIELD_DECL)
4506 error ("%qT has no non-static data member named %qD", type,
4508 return error_mark_node;
4512 /* If we processed all the member of the class, we are done. */
4516 field_init = reshape_init_r (TREE_TYPE (field), d,
4517 /*first_initializer_p=*/false);
4518 CONSTRUCTOR_APPEND_ELT (CONSTRUCTOR_ELTS (new_init), field, field_init);
4522 When a union is initialized with a brace-enclosed
4523 initializer, the braces shall only contain an
4524 initializer for the first member of the union. */
4525 if (TREE_CODE (type) == UNION_TYPE)
4528 field = next_initializable_field (TREE_CHAIN (field));
4534 /* Subroutine of reshape_init, which processes a single initializer (part of
4535 a CONSTRUCTOR). TYPE is the type of the variable being initialized, D is the
4536 iterator within the CONSTRUCTOR which points to the initializer to process.
4537 FIRST_INITIALIZER_P is true if this is the first initializer of the
4538 CONSTRUCTOR node. */
4541 reshape_init_r (tree type, reshape_iter *d, bool first_initializer_p)
4543 tree init = d->cur->value;
4545 /* A non-aggregate type is always initialized with a single
4547 if (!CP_AGGREGATE_TYPE_P (type))
4549 /* It is invalid to initialize a non-aggregate type with a
4550 brace-enclosed initializer.
4551 We need to check for BRACE_ENCLOSED_INITIALIZER_P here because
4552 of g++.old-deja/g++.mike/p7626.C: a pointer-to-member constant is
4553 a CONSTRUCTOR (with a record type). */
4554 if (TREE_CODE (init) == CONSTRUCTOR
4555 && BRACE_ENCLOSED_INITIALIZER_P (init)) /* p7626.C */
4557 error ("braces around scalar initializer for type %qT", type);
4558 init = error_mark_node;
4567 All implicit type conversions (clause _conv_) are considered when
4568 initializing the aggregate member with an initializer from an
4569 initializer-list. If the initializer can initialize a member,
4570 the member is initialized. Otherwise, if the member is itself a
4571 non-empty subaggregate, brace elision is assumed and the
4572 initializer is considered for the initialization of the first
4573 member of the subaggregate. */
4574 if (TREE_CODE (init) != CONSTRUCTOR
4575 && can_convert_arg (type, TREE_TYPE (init), init, LOOKUP_NORMAL))
4581 /* [dcl.init.string]
4583 A char array (whether plain char, signed char, or unsigned char)
4584 can be initialized by a string-literal (optionally enclosed in
4585 braces); a wchar_t array can be initialized by a wide
4586 string-literal (optionally enclosed in braces). */
4587 if (TREE_CODE (type) == ARRAY_TYPE
4588 && char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (type))))
4590 tree str_init = init;
4592 /* Strip one level of braces if and only if they enclose a single
4593 element (as allowed by [dcl.init.string]). */
4594 if (!first_initializer_p
4595 && TREE_CODE (str_init) == CONSTRUCTOR
4596 && VEC_length (constructor_elt, CONSTRUCTOR_ELTS (str_init)) == 1)
4598 str_init = VEC_index (constructor_elt,
4599 CONSTRUCTOR_ELTS (str_init), 0)->value;
4602 /* If it's a string literal, then it's the initializer for the array
4603 as a whole. Otherwise, continue with normal initialization for
4604 array types (one value per array element). */
4605 if (TREE_CODE (str_init) == STRING_CST)
4612 /* The following cases are about aggregates. If we are not within a full
4613 initializer already, and there is not a CONSTRUCTOR, it means that there
4614 is a missing set of braces (that is, we are processing the case for
4615 which reshape_init exists). */
4616 if (!first_initializer_p)
4618 if (TREE_CODE (init) == CONSTRUCTOR)
4620 /* For a nested compound literal, there is no need to reshape since
4621 brace elision is not allowed. Even if we decided to allow it,
4622 we should add a call to reshape_init in finish_compound_literal,
4623 before calling digest_init, so changing this code would still
4624 not be necessary. */
4625 if (!COMPOUND_LITERAL_P (init))
4628 gcc_assert (BRACE_ENCLOSED_INITIALIZER_P (init));
4629 return reshape_init (type, init);
4632 gcc_assert (!BRACE_ENCLOSED_INITIALIZER_P (init));
4635 warning (OPT_Wmissing_braces, "missing braces around initializer for %qT",
4639 /* Dispatch to specialized routines. */
4640 if (CLASS_TYPE_P (type))
4641 return reshape_init_class (type, d, first_initializer_p);
4642 else if (TREE_CODE (type) == ARRAY_TYPE)
4643 return reshape_init_array (type, d);
4644 else if (TREE_CODE (type) == VECTOR_TYPE)
4645 return reshape_init_vector (type, d);
4650 /* Undo the brace-elision allowed by [dcl.init.aggr] in a
4651 brace-enclosed aggregate initializer.
4653 INIT is the CONSTRUCTOR containing the list of initializers describing
4654 a brace-enclosed initializer for an entity of the indicated aggregate TYPE.
4655 It may not presently match the shape of the TYPE; for example:
4657 struct S { int a; int b; };
4658 struct S a[] = { 1, 2, 3, 4 };
4660 Here INIT will hold a VEC of four elements, rather than a
4661 VEC of two elements, each itself a VEC of two elements. This
4662 routine transforms INIT from the former form into the latter. The
4663 revised CONSTRUCTOR node is returned. */
4666 reshape_init (tree type, tree init)
4668 VEC(constructor_elt, gc) *v;
4672 gcc_assert (BRACE_ENCLOSED_INITIALIZER_P (init));
4674 v = CONSTRUCTOR_ELTS (init);
4676 /* An empty constructor does not need reshaping, and it is always a valid
4678 if (VEC_empty (constructor_elt, v))
4681 /* Recurse on this CONSTRUCTOR. */
4682 d.cur = VEC_index (constructor_elt, v, 0);
4683 d.end = d.cur + VEC_length (constructor_elt, v);
4685 new_init = reshape_init_r (type, &d, true);
4686 if (new_init == error_mark_node)
4687 return error_mark_node;
4689 /* Make sure all the element of the constructor were used. Otherwise,
4690 issue an error about exceeding initializers. */
4692 error ("too many initializers for %qT", type);
4697 /* Verify INIT (the initializer for DECL), and record the
4698 initialization in DECL_INITIAL, if appropriate. CLEANUP is as for
4699 grok_reference_init.
4701 If the return value is non-NULL, it is an expression that must be
4702 evaluated dynamically to initialize DECL. */
4705 check_initializer (tree decl, tree init, int flags, tree *cleanup)
4707 tree type = TREE_TYPE (decl);
4708 tree init_code = NULL;
4710 /* Things that are going to be initialized need to have complete
4712 TREE_TYPE (decl) = type = complete_type (TREE_TYPE (decl));
4714 if (type == error_mark_node)
4715 /* We will have already complained. */
4717 else if (init && COMPLETE_TYPE_P (type)
4718 && !TREE_CONSTANT (TYPE_SIZE (type)))
4720 error ("variable-sized object %qD may not be initialized", decl);
4723 else if (TREE_CODE (type) == ARRAY_TYPE
4724 && !COMPLETE_TYPE_P (complete_type (TREE_TYPE (type))))
4726 error ("elements of array %q#D have incomplete type", decl);
4729 else if (TREE_CODE (type) != ARRAY_TYPE && !COMPLETE_TYPE_P (type))
4731 error ("%qD has incomplete type", decl);
4732 TREE_TYPE (decl) = error_mark_node;
4735 else if (!CP_AGGREGATE_TYPE_P (type)
4736 && init && BRACE_ENCLOSED_INITIALIZER_P (init)
4737 && VEC_length (constructor_elt, CONSTRUCTOR_ELTS (init)) != 1)
4739 error ("scalar object %qD requires one element in initializer", decl);
4740 TREE_TYPE (decl) = error_mark_node;
4744 if (TREE_CODE (decl) == CONST_DECL)
4746 gcc_assert (TREE_CODE (type) != REFERENCE_TYPE);
4748 DECL_INITIAL (decl) = init;
4750 gcc_assert (init != NULL_TREE);
4753 else if (!DECL_EXTERNAL (decl) && TREE_CODE (type) == REFERENCE_TYPE)
4754 init = grok_reference_init (decl, type, init, cleanup);
4757 /* Do not reshape constructors of vectors (they don't need to be
4759 if (TREE_CODE (init) == CONSTRUCTOR
4760 && !COMPOUND_LITERAL_P (init)
4761 && !TREE_TYPE (init)) /* ptrmemfunc */
4763 init = reshape_init (type, init);
4765 if ((*targetm.vector_opaque_p) (type))
4767 error ("opaque vector types cannot be initialized");
4768 init = error_mark_node;
4772 /* If DECL has an array type without a specific bound, deduce the
4773 array size from the initializer. */
4774 maybe_deduce_size_from_array_init (decl, init);
4775 type = TREE_TYPE (decl);
4776 if (type == error_mark_node)
4779 if (TYPE_HAS_CONSTRUCTOR (type) || TYPE_NEEDS_CONSTRUCTING (type))
4781 if (TREE_CODE (type) == ARRAY_TYPE)
4782 goto initialize_aggr;
4783 else if (TREE_CODE (init) == CONSTRUCTOR)
4785 if (TYPE_NON_AGGREGATE_CLASS (type))
4787 error ("%qD must be initialized by constructor, "
4790 init = error_mark_node;
4793 goto dont_use_constructor;
4797 int saved_stmts_are_full_exprs_p;
4800 saved_stmts_are_full_exprs_p = 0;
4801 if (building_stmt_tree ())
4803 saved_stmts_are_full_exprs_p = stmts_are_full_exprs_p ();
4804 current_stmt_tree ()->stmts_are_full_exprs_p = 1;
4806 init = build_aggr_init (decl, init, flags);
4807 if (building_stmt_tree ())
4808 current_stmt_tree ()->stmts_are_full_exprs_p =
4809 saved_stmts_are_full_exprs_p;
4815 dont_use_constructor:
4816 if (TREE_CODE (init) != TREE_VEC)
4818 init_code = store_init_value (decl, init);
4819 if (pedantic && TREE_CODE (type) == ARRAY_TYPE
4820 && DECL_INITIAL (decl)
4821 && TREE_CODE (DECL_INITIAL (decl)) == STRING_CST
4822 && PAREN_STRING_LITERAL_P (DECL_INITIAL (decl)))
4823 warning (0, "array %qD initialized by parenthesized string literal %qE",
4824 decl, DECL_INITIAL (decl));
4829 else if (DECL_EXTERNAL (decl))
4831 else if (TYPE_P (type) && TYPE_NEEDS_CONSTRUCTING (type))
4832 goto initialize_aggr;
4833 else if (IS_AGGR_TYPE (type))
4835 tree core_type = strip_array_types (type);
4837 if (CLASSTYPE_READONLY_FIELDS_NEED_INIT (core_type))
4838 error ("structure %qD with uninitialized const members", decl);
4839 if (CLASSTYPE_REF_FIELDS_NEED_INIT (core_type))
4840 error ("structure %qD with uninitialized reference members", decl);
4842 check_for_uninitialized_const_var (decl);
4845 check_for_uninitialized_const_var (decl);
4847 if (init && init != error_mark_node)
4848 init_code = build2 (INIT_EXPR, type, decl, init);
4853 /* If DECL is not a local variable, give it RTL. */
4856 make_rtl_for_nonlocal_decl (tree decl, tree init, const char* asmspec)
4858 int toplev = toplevel_bindings_p ();
4860 const char *filename;
4862 /* Set the DECL_ASSEMBLER_NAME for the object. */
4865 /* The `register' keyword, when used together with an
4866 asm-specification, indicates that the variable should be
4867 placed in a particular register. */
4868 if (TREE_CODE (decl) == VAR_DECL && DECL_REGISTER (decl))
4870 set_user_assembler_name (decl, asmspec);
4871 DECL_HARD_REGISTER (decl) = 1;
4875 if (TREE_CODE (decl) == FUNCTION_DECL
4876 && DECL_BUILT_IN_CLASS (decl) == BUILT_IN_NORMAL)
4877 set_builtin_user_assembler_name (decl, asmspec);
4878 set_user_assembler_name (decl, asmspec);
4882 /* Handle non-variables up front. */
4883 if (TREE_CODE (decl) != VAR_DECL)
4885 rest_of_decl_compilation (decl, toplev, at_eof);
4889 /* If we see a class member here, it should be a static data
4891 if (DECL_LANG_SPECIFIC (decl) && DECL_IN_AGGR_P (decl))
4893 gcc_assert (TREE_STATIC (decl));
4894 /* An in-class declaration of a static data member should be
4895 external; it is only a declaration, and not a definition. */
4896 if (init == NULL_TREE)
4897 gcc_assert (DECL_EXTERNAL (decl));
4900 /* We don't create any RTL for local variables. */
4901 if (DECL_FUNCTION_SCOPE_P (decl) && !TREE_STATIC (decl))
4904 /* We defer emission of local statics until the corresponding
4905 DECL_EXPR is expanded. */
4906 defer_p = DECL_FUNCTION_SCOPE_P (decl) || DECL_VIRTUAL_P (decl);
4908 /* We try to defer namespace-scope static constants so that they are
4909 not emitted into the object file unnecessarily. */
4910 filename = input_filename;
4911 if (!DECL_VIRTUAL_P (decl)
4912 && TREE_READONLY (decl)
4913 && DECL_INITIAL (decl) != NULL_TREE
4914 && DECL_INITIAL (decl) != error_mark_node
4916 && ! EMPTY_CONSTRUCTOR_P (DECL_INITIAL (decl))
4918 && !TREE_PUBLIC (decl))
4920 /* Fool with the linkage of static consts according to #pragma
4922 struct c_fileinfo *finfo = get_fileinfo (lbasename (filename));
4923 if (!finfo->interface_unknown && !TREE_PUBLIC (decl))
4925 TREE_PUBLIC (decl) = 1;
4926 DECL_EXTERNAL (decl) = finfo->interface_only;
4931 /* Likewise for template instantiations. */
4932 else if (DECL_LANG_SPECIFIC (decl)
4933 && DECL_IMPLICIT_INSTANTIATION (decl))
4936 /* If we're not deferring, go ahead and assemble the variable. */
4938 rest_of_decl_compilation (decl, toplev, at_eof);
4941 /* Generate code to initialize DECL (a local variable). */
4944 initialize_local_var (tree decl, tree init)
4946 tree type = TREE_TYPE (decl);
4949 gcc_assert (TREE_CODE (decl) == VAR_DECL
4950 || TREE_CODE (decl) == RESULT_DECL);
4951 gcc_assert (!TREE_STATIC (decl));
4953 if (DECL_SIZE (decl) == NULL_TREE)
4955 /* If we used it already as memory, it must stay in memory. */
4956 DECL_INITIAL (decl) = NULL_TREE;
4957 TREE_ADDRESSABLE (decl) = TREE_USED (decl);
4960 if (DECL_SIZE (decl) && type != error_mark_node)
4964 /* Compute and store the initial value. */
4965 already_used = TREE_USED (decl) || TREE_USED (type);
4967 /* Perform the initialization. */
4970 int saved_stmts_are_full_exprs_p;
4972 gcc_assert (building_stmt_tree ());
4973 saved_stmts_are_full_exprs_p = stmts_are_full_exprs_p ();
4974 current_stmt_tree ()->stmts_are_full_exprs_p = 1;
4975 finish_expr_stmt (init);
4976 current_stmt_tree ()->stmts_are_full_exprs_p =
4977 saved_stmts_are_full_exprs_p;
4980 /* Set this to 0 so we can tell whether an aggregate which was
4981 initialized was ever used. Don't do this if it has a
4982 destructor, so we don't complain about the 'resource
4983 allocation is initialization' idiom. Now set
4984 attribute((unused)) on types so decls of that type will be
4985 marked used. (see TREE_USED, above.) */
4986 if (TYPE_NEEDS_CONSTRUCTING (type)
4988 && TYPE_HAS_TRIVIAL_DESTRUCTOR (type)
4989 && DECL_NAME (decl))
4990 TREE_USED (decl) = 0;
4991 else if (already_used)
4992 TREE_USED (decl) = 1;
4995 /* Generate a cleanup, if necessary. */
4996 cleanup = cxx_maybe_build_cleanup (decl);
4997 if (DECL_SIZE (decl) && cleanup)
4998 finish_decl_cleanup (decl, cleanup);
5001 /* DECL is a VAR_DECL for a compiler-generated variable with static
5002 storage duration (like a virtual table) whose initializer is a
5003 compile-time constant. INIT must be either a TREE_LIST of values,
5004 or a CONSTRUCTOR. Initialize the variable and provide it to the
5008 initialize_artificial_var (tree decl, tree init)
5010 gcc_assert (DECL_ARTIFICIAL (decl));
5011 if (TREE_CODE (init) == TREE_LIST)
5012 init = build_constructor_from_list (NULL_TREE, init);
5013 gcc_assert (TREE_CODE (init) == CONSTRUCTOR);
5014 DECL_INITIAL (decl) = init;
5015 DECL_INITIALIZED_P (decl) = 1;
5016 determine_visibility (decl);
5017 layout_var_decl (decl);
5018 maybe_commonize_var (decl);
5019 make_rtl_for_nonlocal_decl (decl, init, /*asmspec=*/NULL);
5022 /* Finish processing of a declaration;
5023 install its line number and initial value.
5024 If the length of an array type is not known before,
5025 it must be determined now, from the initial value, or it is an error.
5027 INIT is the initializer (if any) for DECL. If INIT_CONST_EXPR_P is
5028 true, then INIT is an integral constant expression.
5030 FLAGS is LOOKUP_ONLYCONVERTING if the = init syntax was used, else 0
5031 if the (init) syntax was used. */
5034 cp_finish_decl (tree decl, tree init, bool init_const_expr_p,
5035 tree asmspec_tree, int flags)
5039 const char *asmspec = NULL;
5040 int was_readonly = 0;
5041 bool var_definition_p = false;
5042 int saved_processing_template_decl;
5044 if (decl == error_mark_node)
5049 error ("assignment (not initialization) in declaration");
5053 gcc_assert (TREE_CODE (decl) != RESULT_DECL);
5054 /* Parameters are handled by store_parm_decls, not cp_finish_decl. */
5055 gcc_assert (TREE_CODE (decl) != PARM_DECL);
5057 type = TREE_TYPE (decl);
5058 if (type == error_mark_node)
5061 /* Assume no cleanup is required. */
5062 cleanup = NULL_TREE;
5063 saved_processing_template_decl = processing_template_decl;
5065 /* If a name was specified, get the string. */
5066 if (global_scope_p (current_binding_level))
5067 asmspec_tree = maybe_apply_renaming_pragma (decl, asmspec_tree);
5068 if (asmspec_tree && asmspec_tree != error_mark_node)
5069 asmspec = TREE_STRING_POINTER (asmspec_tree);
5071 if (current_class_type
5072 && CP_DECL_CONTEXT (decl) == current_class_type
5073 && TYPE_BEING_DEFINED (current_class_type)
5074 && (DECL_INITIAL (decl) || init))
5075 DECL_INITIALIZED_IN_CLASS_P (decl) = 1;
5077 if (processing_template_decl)
5079 bool type_dependent_p;
5081 /* Add this declaration to the statement-tree. */
5082 if (at_function_scope_p ())
5083 add_decl_expr (decl);
5085 type_dependent_p = dependent_type_p (type);
5087 if (init && init_const_expr_p)
5089 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (decl) = 1;
5090 if (DECL_INTEGRAL_CONSTANT_VAR_P (decl))
5091 TREE_CONSTANT (decl) = 1;
5095 || !DECL_CLASS_SCOPE_P (decl)
5096 || !DECL_INTEGRAL_CONSTANT_VAR_P (decl)
5098 || value_dependent_expression_p (init))
5101 DECL_INITIAL (decl) = init;
5102 if (TREE_CODE (decl) == VAR_DECL
5103 && !DECL_PRETTY_FUNCTION_P (decl)
5104 && !type_dependent_p)
5105 maybe_deduce_size_from_array_init (decl, init);
5109 init = fold_non_dependent_expr (init);
5110 processing_template_decl = 0;
5113 /* Take care of TYPE_DECLs up front. */
5114 if (TREE_CODE (decl) == TYPE_DECL)
5116 if (type != error_mark_node
5117 && IS_AGGR_TYPE (type) && DECL_NAME (decl))
5119 if (TREE_TYPE (DECL_NAME (decl)) && TREE_TYPE (decl) != type)
5120 warning (0, "shadowing previous type declaration of %q#D", decl);
5121 set_identifier_type_value (DECL_NAME (decl), decl);
5124 /* If we have installed this as the canonical typedef for this
5125 type, and that type has not been defined yet, delay emitting
5126 the debug information for it, as we will emit it later. */
5127 if (TYPE_MAIN_DECL (TREE_TYPE (decl)) == decl
5128 && !COMPLETE_TYPE_P (TREE_TYPE (decl)))
5129 TYPE_DECL_SUPPRESS_DEBUG (decl) = 1;
5131 rest_of_decl_compilation (decl, DECL_CONTEXT (decl) == NULL_TREE,
5136 /* A reference will be modified here, as it is initialized. */
5137 if (! DECL_EXTERNAL (decl)
5138 && TREE_READONLY (decl)
5139 && TREE_CODE (type) == REFERENCE_TYPE)
5142 TREE_READONLY (decl) = 0;
5145 if (TREE_CODE (decl) == VAR_DECL)
5147 /* Only PODs can have thread-local storage. Other types may require
5148 various kinds of non-trivial initialization. */
5149 if (DECL_THREAD_LOCAL_P (decl) && !pod_type_p (TREE_TYPE (decl)))
5150 error ("%qD cannot be thread-local because it has non-POD type %qT",
5151 decl, TREE_TYPE (decl));
5152 /* If this is a local variable that will need a mangled name,
5153 register it now. We must do this before processing the
5154 initializer for the variable, since the initialization might
5155 require a guard variable, and since the mangled name of the
5156 guard variable will depend on the mangled name of this
5158 if (!processing_template_decl
5159 && DECL_FUNCTION_SCOPE_P (decl)
5160 && TREE_STATIC (decl)
5161 && !DECL_ARTIFICIAL (decl))
5162 push_local_name (decl);
5163 /* Convert the initializer to the type of DECL, if we have not
5164 already initialized DECL. */
5165 if (!DECL_INITIALIZED_P (decl)
5166 /* If !DECL_EXTERNAL then DECL is being defined. In the
5167 case of a static data member initialized inside the
5168 class-specifier, there can be an initializer even if DECL
5169 is *not* defined. */
5170 && (!DECL_EXTERNAL (decl) || init))
5174 DECL_NONTRIVIALLY_INITIALIZED_P (decl) = 1;
5175 if (init_const_expr_p)
5177 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (decl) = 1;
5178 if (DECL_INTEGRAL_CONSTANT_VAR_P (decl))
5179 TREE_CONSTANT (decl) = 1;
5182 init = check_initializer (decl, init, flags, &cleanup);
5183 /* Thread-local storage cannot be dynamically initialized. */
5184 if (DECL_THREAD_LOCAL_P (decl) && init)
5186 error ("%qD is thread-local and so cannot be dynamically "
5187 "initialized", decl);
5191 /* Check that the initializer for a static data member was a
5192 constant. Although we check in the parser that the
5193 initializer is an integral constant expression, we do not
5194 simplify division-by-zero at the point at which it
5195 occurs. Therefore, in:
5197 struct S { static const int i = 7 / 0; };
5199 we issue an error at this point. It would
5200 probably be better to forbid division by zero in
5201 integral constant expressions. */
5202 if (DECL_EXTERNAL (decl) && init)
5204 error ("%qD cannot be initialized by a non-constant expression"
5205 " when being declared", decl);
5206 DECL_INITIALIZED_IN_CLASS_P (decl) = 0;
5214 The memory occupied by any object of static storage
5215 duration is zero-initialized at program startup before
5216 any other initialization takes place.
5218 We cannot create an appropriate initializer until after
5219 the type of DECL is finalized. If DECL_INITIAL is set,
5220 then the DECL is statically initialized, and any
5221 necessary zero-initialization has already been performed. */
5222 if (TREE_STATIC (decl) && !DECL_INITIAL (decl))
5223 DECL_INITIAL (decl) = build_zero_init (TREE_TYPE (decl),
5224 /*nelts=*/NULL_TREE,
5225 /*static_storage_p=*/true);
5226 /* Remember that the initialization for this variable has
5228 DECL_INITIALIZED_P (decl) = 1;
5229 /* This declaration is the definition of this variable,
5230 unless we are initializing a static data member within
5231 the class specifier. */
5232 if (!DECL_EXTERNAL (decl))
5233 var_definition_p = true;
5235 /* If the variable has an array type, lay out the type, even if
5236 there is no initializer. It is valid to index through the
5237 array, and we must get TYPE_ALIGN set correctly on the array
5239 else if (TREE_CODE (type) == ARRAY_TYPE)
5243 /* Add this declaration to the statement-tree. This needs to happen
5244 after the call to check_initializer so that the DECL_EXPR for a
5245 reference temp is added before the DECL_EXPR for the reference itself. */
5246 if (at_function_scope_p ())
5247 add_decl_expr (decl);
5249 /* Let the middle end know about variables and functions -- but not
5250 static data members in uninstantiated class templates. */
5251 if (!saved_processing_template_decl
5252 && (TREE_CODE (decl) == VAR_DECL
5253 || TREE_CODE (decl) == FUNCTION_DECL))
5255 if (TREE_CODE (decl) == VAR_DECL)
5257 layout_var_decl (decl);
5258 maybe_commonize_var (decl);
5259 if (DECL_NAMESPACE_SCOPE_P (decl) && !TREE_PUBLIC (decl)
5260 && !DECL_THIS_STATIC (decl) && !DECL_ARTIFICIAL (decl))
5262 /* This is a const variable with implicit 'static'. Set
5263 DECL_THIS_STATIC so we can tell it from variables that are
5264 !TREE_PUBLIC because of the anonymous namespace. */
5265 DECL_THIS_STATIC (decl) = 1;
5269 make_rtl_for_nonlocal_decl (decl, init, asmspec);
5271 /* Check for abstractness of the type. Notice that there is no
5272 need to strip array types here since the check for those types
5273 is already done within create_array_type_for_decl. */
5274 if (TREE_CODE (type) == FUNCTION_TYPE
5275 || TREE_CODE (type) == METHOD_TYPE)
5276 abstract_virtuals_error (decl, TREE_TYPE (type));
5278 abstract_virtuals_error (decl, type);
5280 /* This needs to happen after the linkage is set. */
5281 determine_visibility (decl);
5283 if (TREE_CODE (decl) == FUNCTION_DECL
5284 || TREE_TYPE (decl) == error_mark_node)
5285 /* No initialization required. */
5287 else if (DECL_EXTERNAL (decl)
5288 && ! (DECL_LANG_SPECIFIC (decl)
5289 && DECL_NOT_REALLY_EXTERN (decl)))
5292 DECL_INITIAL (decl) = init;
5296 /* A variable definition. */
5297 if (DECL_FUNCTION_SCOPE_P (decl))
5299 /* Initialize the local variable. */
5300 if (processing_template_decl)
5301 DECL_INITIAL (decl) = init;
5302 else if (!TREE_STATIC (decl))
5303 initialize_local_var (decl, init);
5306 /* If a variable is defined, and then a subsequent
5307 definition with external linkage is encountered, we will
5308 get here twice for the same variable. We want to avoid
5309 calling expand_static_init more than once. For variables
5310 that are not static data members, we can call
5311 expand_static_init only when we actually process the
5312 initializer. It is not legal to redeclare a static data
5313 member, so this issue does not arise in that case. */
5314 if (var_definition_p && TREE_STATIC (decl))
5315 expand_static_init (decl, init);
5319 /* If a CLEANUP_STMT was created to destroy a temporary bound to a
5320 reference, insert it in the statement-tree now. */
5322 push_cleanup (decl, cleanup, false);
5325 processing_template_decl = saved_processing_template_decl;
5328 TREE_READONLY (decl) = 1;
5330 /* If this was marked 'used', be sure it will be output. */
5331 if (lookup_attribute ("used", DECL_ATTRIBUTES (decl)))
5332 mark_decl_referenced (decl);
5335 /* This is here for a midend callback from c-common.c. */
5338 finish_decl (tree decl, tree init, tree asmspec_tree)
5340 cp_finish_decl (decl, init, /*init_const_expr_p=*/false, asmspec_tree, 0);
5343 /* Returns a declaration for a VAR_DECL as if:
5345 extern "C" TYPE NAME;
5347 had been seen. Used to create compiler-generated global
5351 declare_global_var (tree name, tree type)
5355 push_to_top_level ();
5356 decl = build_decl (VAR_DECL, name, type);
5357 TREE_PUBLIC (decl) = 1;
5358 DECL_EXTERNAL (decl) = 1;
5359 DECL_ARTIFICIAL (decl) = 1;
5360 /* If the user has explicitly declared this variable (perhaps
5361 because the code we are compiling is part of a low-level runtime
5362 library), then it is possible that our declaration will be merged
5363 with theirs by pushdecl. */
5364 decl = pushdecl (decl);
5365 finish_decl (decl, NULL_TREE, NULL_TREE);
5366 pop_from_top_level ();
5371 /* Returns a pointer to the `atexit' function. Note that if
5372 FLAG_USE_CXA_ATEXIT is nonzero, then this will actually be the new
5373 `__cxa_atexit' function specified in the IA64 C++ ABI. */
5376 get_atexit_node (void)
5383 bool use_aeabi_atexit;
5388 if (flag_use_cxa_atexit)
5390 /* The declaration for `__cxa_atexit' is:
5392 int __cxa_atexit (void (*)(void *), void *, void *)
5394 We build up the argument types and then then function type
5397 use_aeabi_atexit = targetm.cxx.use_aeabi_atexit ();
5398 /* First, build the pointer-to-function type for the first
5400 arg_types = tree_cons (NULL_TREE, ptr_type_node, void_list_node);
5401 fn_type = build_function_type (void_type_node, arg_types);
5402 fn_ptr_type = build_pointer_type (fn_type);
5403 /* Then, build the rest of the argument types. */
5404 arg_types = tree_cons (NULL_TREE, ptr_type_node, void_list_node);
5405 if (use_aeabi_atexit)
5407 arg_types = tree_cons (NULL_TREE, fn_ptr_type, arg_types);
5408 arg_types = tree_cons (NULL_TREE, ptr_type_node, arg_types);
5412 arg_types = tree_cons (NULL_TREE, ptr_type_node, arg_types);
5413 arg_types = tree_cons (NULL_TREE, fn_ptr_type, arg_types);
5415 /* And the final __cxa_atexit type. */
5416 fn_type = build_function_type (integer_type_node, arg_types);
5417 fn_ptr_type = build_pointer_type (fn_type);
5418 if (use_aeabi_atexit)
5419 name = "__aeabi_atexit";
5421 name = "__cxa_atexit";
5425 /* The declaration for `atexit' is:
5427 int atexit (void (*)());
5429 We build up the argument types and then then function type
5431 fn_type = build_function_type (void_type_node, void_list_node);
5432 fn_ptr_type = build_pointer_type (fn_type);
5433 arg_types = tree_cons (NULL_TREE, fn_ptr_type, void_list_node);
5434 /* Build the final atexit type. */
5435 fn_type = build_function_type (integer_type_node, arg_types);
5439 /* Now, build the function declaration. */
5440 push_lang_context (lang_name_c);
5441 atexit_fndecl = build_library_fn_ptr (name, fn_type);
5442 mark_used (atexit_fndecl);
5443 pop_lang_context ();
5444 atexit_node = decay_conversion (atexit_fndecl);
5449 /* Returns the __dso_handle VAR_DECL. */
5452 get_dso_handle_node (void)
5454 if (dso_handle_node)
5455 return dso_handle_node;
5457 /* Declare the variable. */
5458 dso_handle_node = declare_global_var (get_identifier ("__dso_handle"),
5461 return dso_handle_node;
5464 /* Begin a new function with internal linkage whose job will be simply
5465 to destroy some particular variable. */
5467 static GTY(()) int start_cleanup_cnt;
5470 start_cleanup_fn (void)
5477 push_to_top_level ();
5479 /* No need to mangle this. */
5480 push_lang_context (lang_name_c);
5482 /* Build the parameter-types. */
5483 parmtypes = void_list_node;
5484 /* Functions passed to __cxa_atexit take an additional parameter.
5485 We'll just ignore it. After we implement the new calling
5486 convention for destructors, we can eliminate the use of
5487 additional cleanup functions entirely in the -fnew-abi case. */
5488 if (flag_use_cxa_atexit)
5489 parmtypes = tree_cons (NULL_TREE, ptr_type_node, parmtypes);
5490 /* Build the function type itself. */
5491 fntype = build_function_type (void_type_node, parmtypes);
5492 /* Build the name of the function. */
5493 sprintf (name, "__tcf_%d", start_cleanup_cnt++);
5494 /* Build the function declaration. */
5495 fndecl = build_lang_decl (FUNCTION_DECL, get_identifier (name), fntype);
5496 /* It's a function with internal linkage, generated by the
5498 TREE_PUBLIC (fndecl) = 0;
5499 DECL_ARTIFICIAL (fndecl) = 1;
5500 /* Make the function `inline' so that it is only emitted if it is
5501 actually needed. It is unlikely that it will be inlined, since
5502 it is only called via a function pointer, but we avoid unnecessary
5503 emissions this way. */
5504 DECL_INLINE (fndecl) = 1;
5505 DECL_DECLARED_INLINE_P (fndecl) = 1;
5506 DECL_INTERFACE_KNOWN (fndecl) = 1;
5507 /* Build the parameter. */
5508 if (flag_use_cxa_atexit)
5512 parmdecl = cp_build_parm_decl (NULL_TREE, ptr_type_node);
5513 DECL_CONTEXT (parmdecl) = fndecl;
5514 TREE_USED (parmdecl) = 1;
5515 DECL_ARGUMENTS (fndecl) = parmdecl;
5519 start_preparsed_function (fndecl, NULL_TREE, SF_PRE_PARSED);
5521 pop_lang_context ();
5523 return current_function_decl;
5526 /* Finish the cleanup function begun by start_cleanup_fn. */
5529 end_cleanup_fn (void)
5531 expand_or_defer_fn (finish_function (0));
5533 pop_from_top_level ();
5536 /* Generate code to handle the destruction of DECL, an object with
5537 static storage duration. */
5540 register_dtor_fn (tree decl)
5547 if (TYPE_HAS_TRIVIAL_DESTRUCTOR (TREE_TYPE (decl)))
5548 return void_zero_node;
5550 /* Call build_cleanup before we enter the anonymous function so that
5551 any access checks will be done relative to the current scope,
5552 rather than the scope of the anonymous function. */
5553 build_cleanup (decl);
5555 /* Now start the function. */
5556 cleanup = start_cleanup_fn ();
5558 /* Now, recompute the cleanup. It may contain SAVE_EXPRs that refer
5559 to the original function, rather than the anonymous one. That
5560 will make the back-end think that nested functions are in use,
5561 which causes confusion. */
5563 push_deferring_access_checks (dk_no_check);
5564 fcall = build_cleanup (decl);
5565 pop_deferring_access_checks ();
5567 /* Create the body of the anonymous function. */
5568 compound_stmt = begin_compound_stmt (BCS_FN_BODY);
5569 finish_expr_stmt (fcall);
5570 finish_compound_stmt (compound_stmt);
5573 /* Call atexit with the cleanup function. */
5574 cxx_mark_addressable (cleanup);
5575 mark_used (cleanup);
5576 cleanup = build_unary_op (ADDR_EXPR, cleanup, 0);
5577 if (flag_use_cxa_atexit)
5579 args = tree_cons (NULL_TREE,
5580 build_unary_op (ADDR_EXPR, get_dso_handle_node (), 0),
5582 if (targetm.cxx.use_aeabi_atexit ())
5584 args = tree_cons (NULL_TREE, cleanup, args);
5585 args = tree_cons (NULL_TREE, null_pointer_node, args);
5589 args = tree_cons (NULL_TREE, null_pointer_node, args);
5590 args = tree_cons (NULL_TREE, cleanup, args);
5594 args = tree_cons (NULL_TREE, cleanup, NULL_TREE);
5595 return build_function_call (get_atexit_node (), args);
5598 /* DECL is a VAR_DECL with static storage duration. INIT, if present,
5599 is its initializer. Generate code to handle the construction
5600 and destruction of DECL. */
5603 expand_static_init (tree decl, tree init)
5605 gcc_assert (TREE_CODE (decl) == VAR_DECL);
5606 gcc_assert (TREE_STATIC (decl));
5608 /* Some variables require no initialization. */
5610 && !TYPE_NEEDS_CONSTRUCTING (TREE_TYPE (decl))
5611 && TYPE_HAS_TRIVIAL_DESTRUCTOR (TREE_TYPE (decl)))
5614 if (DECL_FUNCTION_SCOPE_P (decl))
5616 /* Emit code to perform this initialization but once. */
5617 tree if_stmt = NULL_TREE, inner_if_stmt = NULL_TREE;
5618 tree then_clause = NULL_TREE, inner_then_clause = NULL_TREE;
5619 tree guard, guard_addr, guard_addr_list;
5620 tree acquire_fn, release_fn, abort_fn;
5623 /* Emit code to perform this initialization but once. This code
5626 static <type> guard;
5627 if (!guard.first_byte) {
5628 if (__cxa_guard_acquire (&guard)) {
5631 // Do initialization.
5632 flag = true; __cxa_guard_release (&guard);
5633 // Register variable for destruction at end of program.
5635 if (!flag) __cxa_guard_abort (&guard);
5639 Note that the `flag' variable is only set to 1 *after* the
5640 initialization is complete. This ensures that an exception,
5641 thrown during the construction, will cause the variable to
5642 reinitialized when we pass through this code again, as per:
5646 If the initialization exits by throwing an exception, the
5647 initialization is not complete, so it will be tried again
5648 the next time control enters the declaration.
5650 This process should be thread-safe, too; multiple threads
5651 should not be able to initialize the variable more than
5654 /* Create the guard variable. */
5655 guard = get_guard (decl);
5657 /* This optimization isn't safe on targets with relaxed memory
5658 consistency. On such targets we force synchronization in
5659 __cxa_guard_acquire. */
5660 if (!targetm.relaxed_ordering || !flag_threadsafe_statics)
5662 /* Begin the conditional initialization. */
5663 if_stmt = begin_if_stmt ();
5664 finish_if_stmt_cond (get_guard_cond (guard), if_stmt);
5665 then_clause = begin_compound_stmt (BCS_NO_SCOPE);
5668 if (flag_threadsafe_statics)
5670 guard_addr = build_address (guard);
5671 guard_addr_list = build_tree_list (NULL_TREE, guard_addr);
5673 acquire_fn = get_identifier ("__cxa_guard_acquire");
5674 release_fn = get_identifier ("__cxa_guard_release");
5675 abort_fn = get_identifier ("__cxa_guard_abort");
5676 if (!get_global_value_if_present (acquire_fn, &acquire_fn))
5678 tree argtypes = tree_cons (NULL_TREE, TREE_TYPE (guard_addr),
5680 tree vfntype = build_function_type (void_type_node, argtypes);
5681 acquire_fn = push_library_fn
5682 (acquire_fn, build_function_type (integer_type_node, argtypes));
5683 release_fn = push_library_fn (release_fn, vfntype);
5684 abort_fn = push_library_fn (abort_fn, vfntype);
5688 release_fn = identifier_global_value (release_fn);
5689 abort_fn = identifier_global_value (abort_fn);
5692 inner_if_stmt = begin_if_stmt ();
5693 finish_if_stmt_cond (build_call (acquire_fn, guard_addr_list),
5696 inner_then_clause = begin_compound_stmt (BCS_NO_SCOPE);
5697 begin = get_target_expr (boolean_false_node);
5698 flag = TARGET_EXPR_SLOT (begin);
5700 TARGET_EXPR_CLEANUP (begin)
5701 = build3 (COND_EXPR, void_type_node, flag,
5703 build_call (abort_fn, guard_addr_list));
5704 CLEANUP_EH_ONLY (begin) = 1;
5706 /* Do the initialization itself. */
5707 init = add_stmt_to_compound (begin, init);
5708 init = add_stmt_to_compound
5709 (init, build2 (MODIFY_EXPR, void_type_node, flag, boolean_true_node));
5710 init = add_stmt_to_compound
5711 (init, build_call (release_fn, guard_addr_list));
5714 init = add_stmt_to_compound (init, set_guard (guard));
5716 /* Use atexit to register a function for destroying this static
5718 init = add_stmt_to_compound (init, register_dtor_fn (decl));
5720 finish_expr_stmt (init);
5722 if (flag_threadsafe_statics)
5724 finish_compound_stmt (inner_then_clause);
5725 finish_then_clause (inner_if_stmt);
5726 finish_if_stmt (inner_if_stmt);
5729 if (!targetm.relaxed_ordering || !flag_threadsafe_statics)
5731 finish_compound_stmt (then_clause);
5732 finish_then_clause (if_stmt);
5733 finish_if_stmt (if_stmt);
5737 static_aggregates = tree_cons (init, decl, static_aggregates);
5741 /* Make TYPE a complete type based on INITIAL_VALUE.
5742 Return 0 if successful, 1 if INITIAL_VALUE can't be deciphered,
5743 2 if there was no information (in which case assume 0 if DO_DEFAULT),
5744 3 if the initializer list is empty (in pedantic mode). */
5747 cp_complete_array_type (tree *ptype, tree initial_value, bool do_default)
5750 tree type, elt_type;
5754 /* An array of character type can be initialized from a
5755 brace-enclosed string constant.
5757 FIXME: this code is duplicated from reshape_init. Probably
5758 we should just call reshape_init here? */
5759 if (char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (*ptype)))
5760 && TREE_CODE (initial_value) == CONSTRUCTOR
5761 && !VEC_empty (constructor_elt, CONSTRUCTOR_ELTS (initial_value)))
5763 VEC(constructor_elt,gc) *v = CONSTRUCTOR_ELTS (initial_value);
5764 tree value = VEC_index (constructor_elt, v, 0)->value;
5766 if (TREE_CODE (value) == STRING_CST
5767 && VEC_length (constructor_elt, v) == 1)
5768 initial_value = value;
5772 failure = complete_array_type (ptype, initial_value, do_default);
5774 /* We can create the array before the element type is complete, which
5775 means that we didn't have these two bits set in the original type
5776 either. In completing the type, we are expected to propagate these
5777 bits. See also complete_type which does the same thing for arrays
5780 if (TYPE_DOMAIN (type))
5782 elt_type = TREE_TYPE (type);
5783 TYPE_NEEDS_CONSTRUCTING (type) = TYPE_NEEDS_CONSTRUCTING (elt_type);
5784 TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type)
5785 = TYPE_HAS_NONTRIVIAL_DESTRUCTOR (elt_type);
5791 /* Return zero if something is declared to be a member of type
5792 CTYPE when in the context of CUR_TYPE. STRING is the error
5793 message to print in that case. Otherwise, quietly return 1. */
5796 member_function_or_else (tree ctype, tree cur_type, enum overload_flags flags)
5798 if (ctype && ctype != cur_type)
5800 if (flags == DTOR_FLAG)
5801 error ("destructor for alien class %qT cannot be a member", ctype);
5803 error ("constructor for alien class %qT cannot be a member", ctype);
5809 /* Subroutine of `grokdeclarator'. */
5811 /* Generate errors possibly applicable for a given set of specifiers.
5812 This is for ARM $7.1.2. */
5815 bad_specifiers (tree object,
5824 error ("%qD declared as a %<virtual%> %s", object, type);
5826 error ("%qD declared as an %<inline%> %s", object, type);
5828 error ("%<const%> and %<volatile%> function specifiers on "
5829 "%qD invalid in %s declaration",
5832 error ("%q+D declared as a friend", object);
5834 && (TREE_CODE (object) == TYPE_DECL
5835 || (!TYPE_PTRFN_P (TREE_TYPE (object))
5836 && !TYPE_REFFN_P (TREE_TYPE (object))
5837 && !TYPE_PTRMEMFUNC_P (TREE_TYPE (object)))))
5838 error ("%q+D declared with an exception specification", object);
5841 /* DECL is a member function or static data member and is presently
5842 being defined. Check that the definition is taking place in a
5846 check_class_member_definition_namespace (tree decl)
5848 /* These checks only apply to member functions and static data
5850 gcc_assert (TREE_CODE (decl) == FUNCTION_DECL
5851 || TREE_CODE (decl) == VAR_DECL);
5852 /* We check for problems with specializations in pt.c in
5853 check_specialization_namespace, where we can issue better
5855 if (processing_specialization)
5857 /* There are no restrictions on the placement of
5858 explicit instantiations. */
5859 if (processing_explicit_instantiation)
5863 A member function definition that appears outside of the
5864 class definition shall appear in a namespace scope enclosing
5865 the class definition.
5869 The definition for a static data member shall appear in a
5870 namespace scope enclosing the member's class definition. */
5871 if (!is_ancestor (current_namespace, DECL_CONTEXT (decl)))
5872 pedwarn ("definition of %qD is not in namespace enclosing %qT",
5873 decl, DECL_CONTEXT (decl));
5876 /* Build a PARM_DECL for the "this" parameter. TYPE is the
5877 METHOD_TYPE for a non-static member function; QUALS are the
5878 cv-qualifiers that apply to the function. */
5881 build_this_parm (tree type, cp_cv_quals quals)
5886 cp_cv_quals this_quals;
5888 this_type = TREE_VALUE (TYPE_ARG_TYPES (type));
5889 /* The `this' parameter is implicitly `const'; it cannot be
5891 this_quals = (quals & TYPE_QUAL_RESTRICT) | TYPE_QUAL_CONST;
5892 qual_type = cp_build_qualified_type (this_type, this_quals);
5893 parm = build_artificial_parm (this_identifier, qual_type);
5894 cp_apply_type_quals_to_decl (this_quals, parm);
5898 /* CTYPE is class type, or null if non-class.
5899 TYPE is type this FUNCTION_DECL should have, either FUNCTION_TYPE
5901 DECLARATOR is the function's name.
5902 PARMS is a chain of PARM_DECLs for the function.
5903 VIRTUALP is truthvalue of whether the function is virtual or not.
5904 FLAGS are to be passed through to `grokclassfn'.
5905 QUALS are qualifiers indicating whether the function is `const'
5907 RAISES is a list of exceptions that this function can raise.
5908 CHECK is 1 if we must find this method in CTYPE, 0 if we should
5909 not look, and -1 if we should not call `grokclassfn' at all.
5911 SFK is the kind of special function (if any) for the new function.
5913 Returns `NULL_TREE' if something goes wrong, after issuing
5914 applicable error messages. */
5917 grokfndecl (tree ctype,
5921 tree orig_declarator,
5923 enum overload_flags flags,
5930 special_function_kind sfk,
5937 int staticp = ctype && TREE_CODE (type) == FUNCTION_TYPE;
5941 type = build_exception_variant (type, raises);
5943 decl = build_lang_decl (FUNCTION_DECL, declarator, type);
5944 if (TREE_CODE (type) == METHOD_TYPE)
5947 parm = build_this_parm (type, quals);
5948 TREE_CHAIN (parm) = parms;
5951 DECL_ARGUMENTS (decl) = parms;
5952 /* Propagate volatile out from type to decl. */
5953 if (TYPE_VOLATILE (type))
5954 TREE_THIS_VOLATILE (decl) = 1;
5957 && TREE_CODE (orig_declarator) == TEMPLATE_ID_EXPR)
5961 ("defining explicit specialization %qD in friend declaration",
5965 tree fns = TREE_OPERAND (orig_declarator, 0);
5966 tree args = TREE_OPERAND (orig_declarator, 1);
5968 if (PROCESSING_REAL_TEMPLATE_DECL_P ())
5970 /* Something like `template <class T> friend void f<T>()'. */
5971 error ("invalid use of template-id %qD in declaration "
5972 "of primary template",
5978 /* A friend declaration of the form friend void f<>(). Record
5979 the information in the TEMPLATE_ID_EXPR. */
5980 SET_DECL_IMPLICIT_INSTANTIATION (decl);
5982 if (TREE_CODE (fns) == COMPONENT_REF)
5984 /* Due to bison parser ickiness, we will have already looked
5985 up an operator_name or PFUNCNAME within the current class
5986 (see template_id in parse.y). If the current class contains
5987 such a name, we'll get a COMPONENT_REF here. Undo that. */
5989 gcc_assert (TREE_TYPE (TREE_OPERAND (fns, 0))
5990 == current_class_type);
5991 fns = TREE_OPERAND (fns, 1);
5993 gcc_assert (TREE_CODE (fns) == IDENTIFIER_NODE
5994 || TREE_CODE (fns) == OVERLOAD);
5995 DECL_TEMPLATE_INFO (decl) = tree_cons (fns, args, NULL_TREE);
5997 for (t = TYPE_ARG_TYPES (TREE_TYPE (decl)); t; t = TREE_CHAIN (t))
5998 if (TREE_PURPOSE (t)
5999 && TREE_CODE (TREE_PURPOSE (t)) == DEFAULT_ARG)
6001 error ("default arguments are not allowed in declaration "
6002 "of friend template specialization %qD",
6009 error ("%<inline%> is not allowed in declaration of friend "
6010 "template specialization %qD",
6017 /* If this decl has namespace scope, set that up. */
6019 set_decl_namespace (decl, in_namespace, friendp);
6021 DECL_CONTEXT (decl) = FROB_CONTEXT (current_namespace);
6023 /* `main' and builtins have implicit 'C' linkage. */
6024 if ((MAIN_NAME_P (declarator)
6025 || (IDENTIFIER_LENGTH (declarator) > 10
6026 && IDENTIFIER_POINTER (declarator)[0] == '_'
6027 && IDENTIFIER_POINTER (declarator)[1] == '_'
6028 && strncmp (IDENTIFIER_POINTER (declarator)+2, "builtin_", 8) == 0))
6029 && current_lang_name == lang_name_cplusplus
6030 && ctype == NULL_TREE
6031 /* NULL_TREE means global namespace. */
6032 && DECL_CONTEXT (decl) == NULL_TREE)
6033 SET_DECL_LANGUAGE (decl, lang_c);
6035 /* Should probably propagate const out from type to decl I bet (mrs). */
6038 DECL_STATIC_FUNCTION_P (decl) = 1;
6039 DECL_CONTEXT (decl) = ctype;
6044 DECL_CONTEXT (decl) = ctype;
6046 check_class_member_definition_namespace (decl);
6049 if (ctype == NULL_TREE && DECL_MAIN_P (decl))
6051 if (processing_template_decl)
6052 error ("cannot declare %<::main%> to be a template");
6054 error ("cannot declare %<::main%> to be inline");
6056 error ("cannot declare %<::main%> to be static");
6057 if (!same_type_p (TREE_TYPE (TREE_TYPE (decl)),
6060 tree oldtypeargs = TYPE_ARG_TYPES (TREE_TYPE (decl));
6062 error ("%<::main%> must return %<int%>");
6063 newtype = build_function_type (integer_type_node,
6065 TREE_TYPE (decl) = newtype;
6071 /* Members of anonymous types and local classes have no linkage; make
6072 them internal. If a typedef is made later, this will be changed. */
6073 if (ctype && (TYPE_ANONYMOUS_P (ctype)
6074 || decl_function_context (TYPE_MAIN_DECL (ctype))))
6079 /* [basic.link]: A name with no linkage (notably, the name of a class
6080 or enumeration declared in a local scope) shall not be used to
6081 declare an entity with linkage.
6083 Only check this for public decls for now. See core 319, 389. */
6084 t = no_linkage_check (TREE_TYPE (decl),
6085 /*relaxed_p=*/false);
6088 if (TYPE_ANONYMOUS_P (t))
6090 if (DECL_EXTERN_C_P (decl))
6091 /* Allow this; it's pretty common in C. */;
6094 pedwarn ("non-local function %q#D uses anonymous type",
6096 if (DECL_ORIGINAL_TYPE (TYPE_NAME (t)))
6097 pedwarn ("%q+#D does not refer to the unqualified "
6098 "type, so it is not used for linkage",
6103 pedwarn ("non-local function %q#D uses local type %qT", decl, t);
6107 TREE_PUBLIC (decl) = publicp;
6110 DECL_INTERFACE_KNOWN (decl) = 1;
6111 DECL_NOT_REALLY_EXTERN (decl) = 1;
6114 /* If the declaration was declared inline, mark it as such. */
6116 DECL_DECLARED_INLINE_P (decl) = 1;
6117 /* We inline functions that are explicitly declared inline, or, when
6118 the user explicitly asks us to, all functions. */
6119 if (DECL_DECLARED_INLINE_P (decl)
6120 || (flag_inline_trees == 2 && !DECL_INLINE (decl) && funcdef_flag))
6121 DECL_INLINE (decl) = 1;
6123 DECL_EXTERNAL (decl) = 1;
6124 if (quals && TREE_CODE (type) == FUNCTION_TYPE)
6126 error ("%smember function %qD cannot have cv-qualifier",
6127 (ctype ? "static " : "non-"), decl);
6128 quals = TYPE_UNQUALIFIED;
6131 if (IDENTIFIER_OPNAME_P (DECL_NAME (decl)))
6132 grok_op_properties (decl, /*complain=*/true);
6134 if (ctype && decl_function_context (decl))
6135 DECL_NO_STATIC_CHAIN (decl) = 1;
6138 /* Make the init_value nonzero so pushdecl knows this is not
6139 tentative. error_mark_node is replaced later with the BLOCK. */
6140 DECL_INITIAL (decl) = error_mark_node;
6142 if (TYPE_NOTHROW_P (type) || nothrow_libfn_p (decl))
6143 TREE_NOTHROW (decl) = 1;
6145 /* Caller will do the rest of this. */
6149 if (ctype != NULL_TREE)
6151 if (sfk == sfk_constructor)
6152 DECL_CONSTRUCTOR_P (decl) = 1;
6154 grokclassfn (ctype, decl, flags);
6157 decl = check_explicit_specialization (orig_declarator, decl,
6160 4 * (friendp != 0));
6161 if (decl == error_mark_node)
6166 cplus_decl_attributes (&decl, *attrlist, 0);
6167 *attrlist = NULL_TREE;
6170 if (ctype != NULL_TREE
6171 && (! TYPE_FOR_JAVA (ctype) || check_java_method (decl))
6176 old_decl = check_classfn (ctype, decl,
6177 (processing_template_decl
6178 > template_class_depth (ctype))
6179 ? current_template_parms
6186 if (TREE_CODE (old_decl) == TEMPLATE_DECL)
6187 /* Because grokfndecl is always supposed to return a
6188 FUNCTION_DECL, we pull out the DECL_TEMPLATE_RESULT
6189 here. We depend on our callers to figure out that its
6190 really a template that's being returned. */
6191 old_decl = DECL_TEMPLATE_RESULT (old_decl);
6193 if (DECL_STATIC_FUNCTION_P (old_decl)
6194 && TREE_CODE (TREE_TYPE (decl)) == METHOD_TYPE)
6195 /* Remove the `this' parm added by grokclassfn.
6196 XXX Isn't this done in start_function, too? */
6197 revert_static_member_fn (decl);
6198 if (DECL_ARTIFICIAL (old_decl))
6199 error ("definition of implicitly-declared %qD", old_decl);
6201 /* Since we've smashed OLD_DECL to its
6202 DECL_TEMPLATE_RESULT, we must do the same to DECL. */
6203 if (TREE_CODE (decl) == TEMPLATE_DECL)
6204 decl = DECL_TEMPLATE_RESULT (decl);
6206 /* Attempt to merge the declarations. This can fail, in
6207 the case of some invalid specialization declarations. */
6208 pushed_scope = push_scope (ctype);
6209 ok = duplicate_decls (decl, old_decl, friendp);
6211 pop_scope (pushed_scope);
6214 error ("no %q#D member function declared in class %qT",
6222 if (DECL_CONSTRUCTOR_P (decl) && !grok_ctor_properties (ctype, decl))
6225 if (ctype == NULL_TREE || check)
6229 DECL_VIRTUAL_P (decl) = 1;
6234 /* DECL is a VAR_DECL for a static data member. Set flags to reflect
6235 the linkage that DECL will receive in the object file. */
6238 set_linkage_for_static_data_member (tree decl)
6240 /* A static data member always has static storage duration and
6241 external linkage. Note that static data members are forbidden in
6242 local classes -- the only situation in which a class has
6243 non-external linkage. */
6244 TREE_PUBLIC (decl) = 1;
6245 TREE_STATIC (decl) = 1;
6246 /* For non-template classes, static data members are always put
6247 out in exactly those files where they are defined, just as
6248 with ordinary namespace-scope variables. */
6249 if (!processing_template_decl)
6250 DECL_INTERFACE_KNOWN (decl) = 1;
6253 /* Create a VAR_DECL named NAME with the indicated TYPE.
6255 If SCOPE is non-NULL, it is the class type or namespace containing
6256 the variable. If SCOPE is NULL, the variable should is created in
6257 the innermost enclosings scope. */
6260 grokvardecl (tree type,
6262 const cp_decl_specifier_seq *declspecs,
6268 tree explicit_scope;
6270 gcc_assert (!name || TREE_CODE (name) == IDENTIFIER_NODE);
6272 /* Compute the scope in which to place the variable, but remember
6273 whether or not that scope was explicitly specified by the user. */
6274 explicit_scope = scope;
6277 /* An explicit "extern" specifier indicates a namespace-scope
6279 if (declspecs->storage_class == sc_extern)
6280 scope = current_namespace;
6281 else if (!at_function_scope_p ())
6282 scope = current_scope ();
6286 && (/* If the variable is a namespace-scope variable declared in a
6287 template, we need DECL_LANG_SPECIFIC. */
6288 (TREE_CODE (scope) == NAMESPACE_DECL && processing_template_decl)
6289 /* Similarly for namespace-scope variables with language linkage
6291 || (TREE_CODE (scope) == NAMESPACE_DECL
6292 && current_lang_name != lang_name_cplusplus)
6293 /* Similarly for static data members. */
6295 decl = build_lang_decl (VAR_DECL, name, type);
6297 decl = build_decl (VAR_DECL, name, type);
6299 if (explicit_scope && TREE_CODE (explicit_scope) == NAMESPACE_DECL)
6300 set_decl_namespace (decl, explicit_scope, 0);
6302 DECL_CONTEXT (decl) = FROB_CONTEXT (scope);
6304 if (declspecs->storage_class == sc_extern)
6306 DECL_THIS_EXTERN (decl) = 1;
6307 DECL_EXTERNAL (decl) = !initialized;
6310 if (DECL_CLASS_SCOPE_P (decl))
6312 set_linkage_for_static_data_member (decl);
6313 /* This function is only called with out-of-class definitions. */
6314 DECL_EXTERNAL (decl) = 0;
6315 check_class_member_definition_namespace (decl);
6317 /* At top level, either `static' or no s.c. makes a definition
6318 (perhaps tentative), and absence of `static' makes it public. */
6319 else if (toplevel_bindings_p ())
6321 TREE_PUBLIC (decl) = (declspecs->storage_class != sc_static
6322 && (DECL_THIS_EXTERN (decl) || ! constp));
6323 TREE_STATIC (decl) = ! DECL_EXTERNAL (decl);
6325 /* Not at top level, only `static' makes a static definition. */
6328 TREE_STATIC (decl) = declspecs->storage_class == sc_static;
6329 TREE_PUBLIC (decl) = DECL_EXTERNAL (decl);
6332 if (declspecs->specs[(int)ds_thread])
6334 if (targetm.have_tls)
6335 DECL_TLS_MODEL (decl) = decl_default_tls_model (decl);
6337 /* A mere warning is sure to result in improper semantics
6338 at runtime. Don't bother to allow this to compile. */
6339 error ("thread-local storage not supported for this target");
6342 if (TREE_PUBLIC (decl))
6344 /* [basic.link]: A name with no linkage (notably, the name of a class
6345 or enumeration declared in a local scope) shall not be used to
6346 declare an entity with linkage.
6348 Only check this for public decls for now. */
6349 tree t = no_linkage_check (TREE_TYPE (decl), /*relaxed_p=*/false);
6352 if (TYPE_ANONYMOUS_P (t))
6354 if (DECL_EXTERN_C_P (decl))
6355 /* Allow this; it's pretty common in C. */
6359 /* DRs 132, 319 and 389 seem to indicate types with
6360 no linkage can only be used to declare extern "C"
6361 entities. Since it's not always an error in the
6362 ISO C++ 90 Standard, we only issue a warning. */
6363 warning (0, "non-local variable %q#D uses anonymous type",
6365 if (DECL_ORIGINAL_TYPE (TYPE_NAME (t)))
6366 warning (0, "%q+#D does not refer to the unqualified "
6367 "type, so it is not used for linkage",
6372 warning (0, "non-local variable %q#D uses local type %qT", decl, t);
6376 DECL_INTERFACE_KNOWN (decl) = 1;
6381 /* Create and return a canonical pointer to member function type, for
6382 TYPE, which is a POINTER_TYPE to a METHOD_TYPE. */
6385 build_ptrmemfunc_type (tree type)
6389 tree unqualified_variant = NULL_TREE;
6391 if (type == error_mark_node)
6394 /* If a canonical type already exists for this type, use it. We use
6395 this method instead of type_hash_canon, because it only does a
6396 simple equality check on the list of field members. */
6398 if ((t = TYPE_GET_PTRMEMFUNC_TYPE (type)))
6401 /* Make sure that we always have the unqualified pointer-to-member
6403 if (cp_type_quals (type) != TYPE_UNQUALIFIED)
6405 = build_ptrmemfunc_type (TYPE_MAIN_VARIANT (type));
6407 t = make_aggr_type (RECORD_TYPE);
6408 xref_basetypes (t, NULL_TREE);
6410 /* Let the front-end know this is a pointer to member function... */
6411 TYPE_PTRMEMFUNC_FLAG (t) = 1;
6412 /* ... and not really an aggregate. */
6413 SET_IS_AGGR_TYPE (t, 0);
6415 field = build_decl (FIELD_DECL, pfn_identifier, type);
6418 field = build_decl (FIELD_DECL, delta_identifier, delta_type_node);
6419 TREE_CHAIN (field) = fields;
6422 finish_builtin_struct (t, "__ptrmemfunc_type", fields, ptr_type_node);
6424 /* Zap out the name so that the back-end will give us the debugging
6425 information for this anonymous RECORD_TYPE. */
6426 TYPE_NAME (t) = NULL_TREE;
6428 /* If this is not the unqualified form of this pointer-to-member
6429 type, set the TYPE_MAIN_VARIANT for this type to be the
6430 unqualified type. Since they are actually RECORD_TYPEs that are
6431 not variants of each other, we must do this manually. */
6432 if (cp_type_quals (type) != TYPE_UNQUALIFIED)
6434 t = build_qualified_type (t, cp_type_quals (type));
6435 TYPE_MAIN_VARIANT (t) = unqualified_variant;
6436 TYPE_NEXT_VARIANT (t) = TYPE_NEXT_VARIANT (unqualified_variant);
6437 TYPE_NEXT_VARIANT (unqualified_variant) = t;
6440 /* Cache this pointer-to-member type so that we can find it again
6442 TYPE_SET_PTRMEMFUNC_TYPE (type, t);
6447 /* Create and return a pointer to data member type. */
6450 build_ptrmem_type (tree class_type, tree member_type)
6452 if (TREE_CODE (member_type) == METHOD_TYPE)
6456 arg_types = TYPE_ARG_TYPES (member_type);
6457 class_type = (cp_build_qualified_type
6459 cp_type_quals (TREE_TYPE (TREE_VALUE (arg_types)))));
6461 = build_method_type_directly (class_type,
6462 TREE_TYPE (member_type),
6463 TREE_CHAIN (arg_types));
6464 return build_ptrmemfunc_type (build_pointer_type (member_type));
6468 gcc_assert (TREE_CODE (member_type) != FUNCTION_TYPE);
6469 return build_offset_type (class_type, member_type);
6473 /* DECL is a VAR_DECL defined in-class, whose TYPE is also given.
6474 Check to see that the definition is valid. Issue appropriate error
6475 messages. Return 1 if the definition is particularly bad, or 0
6479 check_static_variable_definition (tree decl, tree type)
6481 /* Motion 10 at San Diego: If a static const integral data member is
6482 initialized with an integral constant expression, the initializer
6483 may appear either in the declaration (within the class), or in
6484 the definition, but not both. If it appears in the class, the
6485 member is a member constant. The file-scope definition is always
6487 if (!ARITHMETIC_TYPE_P (type) && TREE_CODE (type) != ENUMERAL_TYPE)
6489 error ("invalid in-class initialization of static data member "
6490 "of non-integral type %qT",
6492 /* If we just return the declaration, crashes will sometimes
6493 occur. We therefore return void_type_node, as if this were a
6494 friend declaration, to cause callers to completely ignore
6495 this declaration. */
6498 else if (!CP_TYPE_CONST_P (type))
6499 error ("ISO C++ forbids in-class initialization of non-const "
6500 "static member %qD",
6502 else if (pedantic && !INTEGRAL_TYPE_P (type))
6503 pedwarn ("ISO C++ forbids initialization of member constant "
6504 "%qD of non-integral type %qT", decl, type);
6509 /* Given the SIZE (i.e., number of elements) in an array, compute an
6510 appropriate index type for the array. If non-NULL, NAME is the
6511 name of the thing being declared. */
6514 compute_array_index_type (tree name, tree size)
6519 if (error_operand_p (size))
6520 return error_mark_node;
6522 type = TREE_TYPE (size);
6523 /* The array bound must be an integer type. */
6524 if (!dependent_type_p (type) && !INTEGRAL_TYPE_P (type))
6527 error ("size of array %qD has non-integral type %qT", name, type);
6529 error ("size of array has non-integral type %qT", type);
6530 size = integer_one_node;
6531 type = TREE_TYPE (size);
6534 if (abi_version_at_least (2)
6535 /* We should only handle value dependent expressions specially. */
6536 ? value_dependent_expression_p (size)
6537 /* But for abi-1, we handled all instances in templates. This
6538 effects the manglings produced. */
6539 : processing_template_decl)
6540 return build_index_type (build_min (MINUS_EXPR, sizetype,
6541 size, integer_one_node));
6543 /* The size might be the result of a cast. */
6544 STRIP_TYPE_NOPS (size);
6546 /* It might be a const variable or enumeration constant. */
6547 size = integral_constant_value (size);
6549 /* Normally, the array-bound will be a constant. */
6550 if (TREE_CODE (size) == INTEGER_CST)
6552 /* Check to see if the array bound overflowed. Make that an
6553 error, no matter how generous we're being. */
6554 int old_flag_pedantic_errors = flag_pedantic_errors;
6555 int old_pedantic = pedantic;
6556 pedantic = flag_pedantic_errors = 1;
6557 constant_expression_warning (size);
6558 pedantic = old_pedantic;
6559 flag_pedantic_errors = old_flag_pedantic_errors;
6561 /* An array must have a positive number of elements. */
6562 if (INT_CST_LT (size, integer_zero_node))
6565 error ("size of array %qD is negative", name);
6567 error ("size of array is negative");
6568 size = integer_one_node;
6570 /* As an extension we allow zero-sized arrays. We always allow
6571 them in system headers because glibc uses them. */
6572 else if (integer_zerop (size) && pedantic && !in_system_header)
6575 pedwarn ("ISO C++ forbids zero-size array %qD", name);
6577 pedwarn ("ISO C++ forbids zero-size array");
6580 else if (TREE_CONSTANT (size))
6582 /* `(int) &fn' is not a valid array bound. */
6584 error ("size of array %qD is not an integral constant-expression",
6587 error ("size of array is not an integral constant-expression");
6588 size = integer_one_node;
6593 pedwarn ("ISO C++ forbids variable-size array %qD", name);
6595 pedwarn ("ISO C++ forbids variable-size array");
6598 if (processing_template_decl && !TREE_CONSTANT (size))
6599 /* A variable sized array. */
6600 itype = build_min (MINUS_EXPR, sizetype, size, integer_one_node);
6603 HOST_WIDE_INT saved_processing_template_decl;
6605 /* Compute the index of the largest element in the array. It is
6606 one less than the number of elements in the array. We save
6607 and restore PROCESSING_TEMPLATE_DECL so that computations in
6608 cp_build_binary_op will be appropriately folded. */
6609 saved_processing_template_decl = processing_template_decl;
6610 processing_template_decl = 0;
6611 itype = cp_build_binary_op (MINUS_EXPR,
6612 cp_convert (ssizetype, size),
6613 cp_convert (ssizetype, integer_one_node));
6614 itype = fold (itype);
6615 processing_template_decl = saved_processing_template_decl;
6617 if (!TREE_CONSTANT (itype))
6618 /* A variable sized array. */
6619 itype = variable_size (itype);
6620 /* Make sure that there was no overflow when creating to a signed
6621 index type. (For example, on a 32-bit machine, an array with
6622 size 2^32 - 1 is too big.) */
6623 else if (TREE_CODE (itype) == INTEGER_CST
6624 && TREE_OVERFLOW (itype))
6626 error ("overflow in array dimension");
6627 TREE_OVERFLOW (itype) = 0;
6631 /* Create and return the appropriate index type. */
6632 return build_index_type (itype);
6635 /* Returns the scope (if any) in which the entity declared by
6636 DECLARATOR will be located. If the entity was declared with an
6637 unqualified name, NULL_TREE is returned. */
6640 get_scope_of_declarator (const cp_declarator *declarator)
6642 while (declarator && declarator->kind != cdk_id)
6643 declarator = declarator->declarator;
6645 /* If the declarator-id is a SCOPE_REF, the scope in which the
6646 declaration occurs is the first operand. */
6648 && declarator->u.id.qualifying_scope)
6649 return declarator->u.id.qualifying_scope;
6651 /* Otherwise, the declarator is not a qualified name; the entity will
6652 be declared in the current scope. */
6656 /* Returns an ARRAY_TYPE for an array with SIZE elements of the
6657 indicated TYPE. If non-NULL, NAME is the NAME of the declaration
6661 create_array_type_for_decl (tree name, tree type, tree size)
6663 tree itype = NULL_TREE;
6664 const char* error_msg;
6666 /* If things have already gone awry, bail now. */
6667 if (type == error_mark_node || size == error_mark_node)
6668 return error_mark_node;
6670 /* Assume that everything will go OK. */
6673 /* There are some types which cannot be array elements. */
6674 switch (TREE_CODE (type))
6677 error_msg = "array of void";
6681 error_msg = "array of functions";
6684 case REFERENCE_TYPE:
6685 error_msg = "array of references";
6689 error_msg = "array of function members";
6696 /* If something went wrong, issue an error-message and return. */
6700 error ("declaration of %qD as %s", name, error_msg);
6702 error ("creating %s", error_msg);
6704 return error_mark_node;
6709 The constant expressions that specify the bounds of the arrays
6710 can be omitted only for the first member of the sequence. */
6711 if (TREE_CODE (type) == ARRAY_TYPE && !TYPE_DOMAIN (type))
6714 error ("declaration of %qD as multidimensional array must "
6715 "have bounds for all dimensions except the first",
6718 error ("multidimensional array must have bounds for all "
6719 "dimensions except the first");
6721 return error_mark_node;
6724 /* Figure out the index type for the array. */
6726 itype = compute_array_index_type (name, size);
6729 T is called the array element type; this type shall not be [...] an
6730 abstract class type. */
6731 abstract_virtuals_error (name, type);
6733 return build_cplus_array_type (type, itype);
6736 /* Check that it's OK to declare a function with the indicated TYPE.
6737 SFK indicates the kind of special function (if any) that this
6738 function is. OPTYPE is the type given in a conversion operator
6739 declaration, or the class type for a constructor/destructor.
6740 Returns the actual return type of the function; that
6741 may be different than TYPE if an error occurs, or for certain
6742 special functions. */
6745 check_special_function_return_type (special_function_kind sfk,
6751 case sfk_constructor:
6753 error ("return type specification for constructor invalid");
6755 if (targetm.cxx.cdtor_returns_this () && !TYPE_FOR_JAVA (optype))
6756 type = build_pointer_type (optype);
6758 type = void_type_node;
6761 case sfk_destructor:
6763 error ("return type specification for destructor invalid");
6764 /* We can't use the proper return type here because we run into
6765 problems with ambiguous bases and covariant returns.
6766 Java classes are left unchanged because (void *) isn't a valid
6767 Java type, and we don't want to change the Java ABI. */
6768 if (targetm.cxx.cdtor_returns_this () && !TYPE_FOR_JAVA (optype))
6769 type = build_pointer_type (void_type_node);
6771 type = void_type_node;
6774 case sfk_conversion:
6775 if (type && !same_type_p (type, optype))
6776 error ("operator %qT declared to return %qT", optype, type);
6778 pedwarn ("return type specified for %<operator %T%>", optype);
6789 /* A variable or data member (whose unqualified name is IDENTIFIER)
6790 has been declared with the indicated TYPE. If the TYPE is not
6791 acceptable, issue an error message and return a type to use for
6792 error-recovery purposes. */
6795 check_var_type (tree identifier, tree type)
6797 if (VOID_TYPE_P (type))
6800 error ("unnamed variable or field declared void");
6801 else if (TREE_CODE (identifier) == IDENTIFIER_NODE)
6803 gcc_assert (!IDENTIFIER_OPNAME_P (identifier));
6804 error ("variable or field %qE declared void", identifier);
6807 error ("variable or field declared void");
6808 type = integer_type_node;
6814 /* Given declspecs and a declarator (abstract or otherwise), determine
6815 the name and type of the object declared and construct a DECL node
6818 DECLSPECS is a chain of tree_list nodes whose value fields
6819 are the storage classes and type specifiers.
6821 DECL_CONTEXT says which syntactic context this declaration is in:
6822 NORMAL for most contexts. Make a VAR_DECL or FUNCTION_DECL or TYPE_DECL.
6823 FUNCDEF for a function definition. Like NORMAL but a few different
6824 error messages in each case. Return value may be zero meaning
6825 this definition is too screwy to try to parse.
6826 MEMFUNCDEF for a function definition. Like FUNCDEF but prepares to
6827 handle member functions (which have FIELD context).
6828 Return value may be zero meaning this definition is too screwy to
6830 PARM for a parameter declaration (either within a function prototype
6831 or before a function body). Make a PARM_DECL, or return void_type_node.
6832 CATCHPARM for a parameter declaration before a catch clause.
6833 TYPENAME if for a typename (in a cast or sizeof).
6834 Don't make a DECL node; just return the ..._TYPE node.
6835 FIELD for a struct or union field; make a FIELD_DECL.
6836 BITFIELD for a field with specified width.
6837 INITIALIZED is 1 if the decl has an initializer.
6839 ATTRLIST is a pointer to the list of attributes, which may be NULL
6840 if there are none; *ATTRLIST may be modified if attributes from inside
6841 the declarator should be applied to the declaration.
6843 When this function is called, scoping variables (such as
6844 CURRENT_CLASS_TYPE) should reflect the scope in which the
6845 declaration occurs, not the scope in which the new declaration will
6846 be placed. For example, on:
6850 when grokdeclarator is called for `S::f', the CURRENT_CLASS_TYPE
6853 Returns a DECL (if a declarator is present), a TYPE (if there is no
6854 declarator, in cases like "struct S;"), or the ERROR_MARK_NODE if an
6858 grokdeclarator (const cp_declarator *declarator,
6859 const cp_decl_specifier_seq *declspecs,
6860 enum decl_context decl_context,
6864 tree type = NULL_TREE;
6866 int virtualp, explicitp, friendp, inlinep, staticp;
6867 int explicit_int = 0;
6868 int explicit_char = 0;
6869 int defaulted_int = 0;
6870 tree dependent_name = NULL_TREE;
6872 tree typedef_decl = NULL_TREE;
6873 const char *name = NULL;
6874 tree typedef_type = NULL_TREE;
6875 /* True if this declarator is a function definition. */
6876 bool funcdef_flag = false;
6877 cp_declarator_kind innermost_code = cdk_error;
6880 /* See the code below that used this. */
6881 tree decl_attr = NULL_TREE;
6884 /* Keep track of what sort of function is being processed
6885 so that we can warn about default return values, or explicit
6886 return values which do not match prescribed defaults. */
6887 special_function_kind sfk = sfk_none;
6889 tree dname = NULL_TREE;
6890 tree ctor_return_type = NULL_TREE;
6891 enum overload_flags flags = NO_SPECIAL;
6892 /* cv-qualifiers that apply to the declarator, for a declaration of
6893 a member function. */
6894 cp_cv_quals memfn_quals = TYPE_UNQUALIFIED;
6895 /* cv-qualifiers that apply to the type specified by the DECLSPECS. */
6897 tree raises = NULL_TREE;
6898 int template_count = 0;
6899 tree returned_attrs = NULL_TREE;
6900 tree parms = NULL_TREE;
6901 const cp_declarator *id_declarator;
6902 /* The unqualified name of the declarator; either an
6903 IDENTIFIER_NODE, BIT_NOT_EXPR, or TEMPLATE_ID_EXPR. */
6904 tree unqualified_id;
6905 /* The class type, if any, in which this entity is located,
6906 or NULL_TREE if none. Note that this value may be different from
6907 the current class type; for example if an attempt is made to declare
6908 "A::f" inside "B", this value will be "A". */
6909 tree ctype = current_class_type;
6910 /* The NAMESPACE_DECL for the namespace in which this entity is
6911 located. If an unqualified name is used to declare the entity,
6912 this value will be NULL_TREE, even if the entity is located at
6914 tree in_namespace = NULL_TREE;
6915 cp_storage_class storage_class;
6916 bool unsigned_p, signed_p, short_p, long_p, thread_p;
6917 bool type_was_error_mark_node = false;
6919 signed_p = declspecs->specs[(int)ds_signed];
6920 unsigned_p = declspecs->specs[(int)ds_unsigned];
6921 short_p = declspecs->specs[(int)ds_short];
6922 long_p = declspecs->specs[(int)ds_long];
6923 longlong = declspecs->specs[(int)ds_long] >= 2;
6924 thread_p = declspecs->specs[(int)ds_thread];
6926 if (decl_context == FUNCDEF)
6927 funcdef_flag = true, decl_context = NORMAL;
6928 else if (decl_context == MEMFUNCDEF)
6929 funcdef_flag = true, decl_context = FIELD;
6930 else if (decl_context == BITFIELD)
6931 bitfield = 1, decl_context = FIELD;
6933 /* Look inside a declarator for the name being declared
6934 and get it as a string, for an error message. */
6935 for (id_declarator = declarator;
6937 id_declarator = id_declarator->declarator)
6939 if (id_declarator->kind != cdk_id)
6940 innermost_code = id_declarator->kind;
6942 switch (id_declarator->kind)
6945 if (id_declarator->declarator
6946 && id_declarator->declarator->kind == cdk_id)
6948 sfk = id_declarator->declarator->u.id.sfk;
6949 if (sfk == sfk_destructor)
6956 tree qualifying_scope = id_declarator->u.id.qualifying_scope;
6957 tree decl = id_declarator->u.id.unqualified_name;
6960 if (qualifying_scope)
6962 if (TYPE_P (qualifying_scope))
6964 ctype = qualifying_scope;
6965 if (innermost_code != cdk_function
6966 && current_class_type
6967 && !UNIQUELY_DERIVED_FROM_P (ctype,
6968 current_class_type))
6970 error ("type %qT is not derived from type %qT",
6971 ctype, current_class_type);
6972 return error_mark_node;
6975 else if (TREE_CODE (qualifying_scope) == NAMESPACE_DECL)
6976 in_namespace = qualifying_scope;
6978 switch (TREE_CODE (decl))
6984 if (innermost_code != cdk_function)
6986 error ("declaration of %qD as non-function", decl);
6987 return error_mark_node;
6989 else if (!qualifying_scope
6990 && !(current_class_type && at_class_scope_p ()))
6992 error ("declaration of %qD as non-member", decl);
6993 return error_mark_node;
6996 type = TREE_OPERAND (decl, 0);
6997 name = IDENTIFIER_POINTER (constructor_name (type));
7002 case TEMPLATE_ID_EXPR:
7004 tree fns = TREE_OPERAND (decl, 0);
7007 if (TREE_CODE (dname) == COMPONENT_REF)
7008 dname = TREE_OPERAND (dname, 1);
7009 if (TREE_CODE (dname) != IDENTIFIER_NODE)
7011 gcc_assert (is_overloaded_fn (dname));
7012 dname = DECL_NAME (get_first_fn (dname));
7017 case IDENTIFIER_NODE:
7018 if (TREE_CODE (decl) == IDENTIFIER_NODE)
7021 if (C_IS_RESERVED_WORD (dname))
7023 error ("declarator-id missing; using reserved word %qD",
7025 name = IDENTIFIER_POINTER (dname);
7027 else if (!IDENTIFIER_TYPENAME_P (dname))
7028 name = IDENTIFIER_POINTER (dname);
7031 gcc_assert (flags == NO_SPECIAL);
7032 flags = TYPENAME_FLAG;
7033 ctor_return_type = TREE_TYPE (dname);
7034 sfk = sfk_conversion;
7035 if (is_typename_at_global_scope (dname))
7036 name = IDENTIFIER_POINTER (dname);
7038 name = "<invalid operator>";
7054 return error_mark_node;
7060 if (id_declarator->kind == cdk_id)
7066 The declarator in a function-definition shall have the form
7067 D1 ( parameter-declaration-clause) ... */
7068 if (funcdef_flag && innermost_code != cdk_function)
7070 error ("function definition does not declare parameters");
7071 return error_mark_node;
7074 if (((dname && IDENTIFIER_OPNAME_P (dname)) || flags == TYPENAME_FLAG)
7075 && innermost_code != cdk_function
7076 && ! (ctype && !declspecs->any_specifiers_p))
7078 error ("declaration of %qD as non-function", dname);
7079 return error_mark_node;
7082 /* Anything declared one level down from the top level
7083 must be one of the parameters of a function
7084 (because the body is at least two levels down). */
7086 /* This heuristic cannot be applied to C++ nodes! Fixed, however,
7087 by not allowing C++ class definitions to specify their parameters
7088 with xdecls (must be spec.d in the parmlist).
7090 Since we now wait to push a class scope until we are sure that
7091 we are in a legitimate method context, we must set oldcname
7092 explicitly (since current_class_name is not yet alive).
7094 We also want to avoid calling this a PARM if it is in a namespace. */
7096 if (decl_context == NORMAL && !toplevel_bindings_p ())
7098 struct cp_binding_level *b = current_binding_level;
7099 current_binding_level = b->level_chain;
7100 if (current_binding_level != 0 && toplevel_bindings_p ())
7101 decl_context = PARM;
7102 current_binding_level = b;
7106 name = decl_context == PARM ? "parameter" : "type name";
7108 /* If there were multiple types specified in the decl-specifier-seq,
7109 issue an error message. */
7110 if (declspecs->multiple_types_p)
7111 error ("two or more data types in declaration of %qs", name);
7112 /* Extract the basic type from the decl-specifier-seq. */
7113 type = declspecs->type;
7114 if (type == error_mark_node)
7117 type_was_error_mark_node = true;
7119 /* If the entire declaration is itself tagged as deprecated then
7120 suppress reports of deprecated items. */
7121 if (type && TREE_DEPRECATED (type)
7122 && deprecated_state != DEPRECATED_SUPPRESS)
7123 warn_deprecated_use (type);
7124 if (type && TREE_CODE (type) == TYPE_DECL)
7126 typedef_decl = type;
7127 type = TREE_TYPE (typedef_decl);
7129 /* No type at all: default to `int', and set DEFAULTED_INT
7130 because it was not a user-defined typedef. */
7131 if (type == NULL_TREE && (signed_p || unsigned_p || long_p || short_p))
7133 /* These imply 'int'. */
7134 type = integer_type_node;
7138 explicit_int = declspecs->explicit_int_p;
7139 explicit_char = declspecs->explicit_char_p;
7142 /* See the code below that used this. */
7144 decl_attr = DECL_ATTRIBUTES (typedef_decl);
7146 typedef_type = type;
7149 if (sfk != sfk_conversion)
7150 ctor_return_type = ctype;
7152 if (sfk != sfk_none)
7153 type = check_special_function_return_type (sfk, type,
7155 else if (type == NULL_TREE)
7161 /* We handle `main' specially here, because 'main () { }' is so
7162 common. With no options, it is allowed. With -Wreturn-type,
7163 it is a warning. It is only an error with -pedantic-errors. */
7164 is_main = (funcdef_flag
7165 && dname && MAIN_NAME_P (dname)
7166 && ctype == NULL_TREE
7167 && in_namespace == NULL_TREE
7168 && current_namespace == global_namespace);
7170 if (type_was_error_mark_node)
7171 /* We've already issued an error, don't complain more. */;
7172 else if (in_system_header || flag_ms_extensions)
7173 /* Allow it, sigh. */;
7174 else if (pedantic || ! is_main)
7175 pedwarn ("ISO C++ forbids declaration of %qs with no type", name);
7176 else if (warn_return_type)
7177 warning (0, "ISO C++ forbids declaration of %qs with no type", name);
7179 type = integer_type_node;
7184 /* Now process the modifiers that were specified
7185 and check for invalid combinations. */
7187 /* Long double is a special combination. */
7188 if (long_p && !longlong && TYPE_MAIN_VARIANT (type) == double_type_node)
7191 type = build_qualified_type (long_double_type_node,
7192 cp_type_quals (type));
7195 /* Check all other uses of type modifiers. */
7197 if (unsigned_p || signed_p || long_p || short_p)
7201 if ((signed_p || unsigned_p) && TREE_CODE (type) != INTEGER_TYPE)
7202 error ("%<signed%> or %<unsigned%> invalid for %qs", name);
7203 else if (signed_p && unsigned_p)
7204 error ("%<signed%> and %<unsigned%> specified together for %qs", name);
7205 else if (longlong && TREE_CODE (type) != INTEGER_TYPE)
7206 error ("%<long long%> invalid for %qs", name);
7207 else if (long_p && TREE_CODE (type) == REAL_TYPE)
7208 error ("%<long%> invalid for %qs", name);
7209 else if (short_p && TREE_CODE (type) == REAL_TYPE)
7210 error ("%<short%> invalid for %qs", name);
7211 else if ((long_p || short_p) && TREE_CODE (type) != INTEGER_TYPE)
7212 error ("%<long%> or %<short%> invalid for %qs", name);
7213 else if ((long_p || short_p) && explicit_char)
7214 error ("%<long%> or %<short%> specified with char for %qs", name);
7215 else if (long_p && short_p)
7216 error ("%<long%> and %<short%> specified together for %qs", name);
7220 if (!explicit_int && !defaulted_int && !explicit_char && pedantic)
7222 pedwarn ("long, short, signed or unsigned used invalidly for %qs",
7224 if (flag_pedantic_errors)
7229 /* Discard the type modifiers if they are invalid. */
7240 /* Decide whether an integer type is signed or not.
7241 Optionally treat bitfields as signed by default. */
7245 It is implementation-defined whether a plain (neither
7246 explicitly signed or unsigned) char, short, int, or long
7247 bit-field is signed or unsigned.
7249 Naturally, we extend this to long long as well. Note that
7250 this does not include wchar_t. */
7251 || (bitfield && !flag_signed_bitfields
7253 /* A typedef for plain `int' without `signed' can be
7254 controlled just like plain `int', but a typedef for
7255 `signed int' cannot be so controlled. */
7257 && C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl))
7258 && TREE_CODE (type) == INTEGER_TYPE
7259 && !same_type_p (TYPE_MAIN_VARIANT (type), wchar_type_node)))
7262 type = long_long_unsigned_type_node;
7264 type = long_unsigned_type_node;
7266 type = short_unsigned_type_node;
7267 else if (type == char_type_node)
7268 type = unsigned_char_type_node;
7269 else if (typedef_decl)
7270 type = c_common_unsigned_type (type);
7272 type = unsigned_type_node;
7274 else if (signed_p && type == char_type_node)
7275 type = signed_char_type_node;
7277 type = long_long_integer_type_node;
7279 type = long_integer_type_node;
7281 type = short_integer_type_node;
7283 if (declspecs->specs[(int)ds_complex])
7285 if (TREE_CODE (type) != INTEGER_TYPE && TREE_CODE (type) != REAL_TYPE)
7286 error ("complex invalid for %qs", name);
7287 /* If we just have "complex", it is equivalent to
7288 "complex double", but if any modifiers at all are specified it is
7289 the complex form of TYPE. E.g, "complex short" is
7290 "complex short int". */
7292 else if (defaulted_int && ! longlong
7293 && ! (long_p || short_p || signed_p || unsigned_p))
7294 type = complex_double_type_node;
7295 else if (type == integer_type_node)
7296 type = complex_integer_type_node;
7297 else if (type == float_type_node)
7298 type = complex_float_type_node;
7299 else if (type == double_type_node)
7300 type = complex_double_type_node;
7301 else if (type == long_double_type_node)
7302 type = complex_long_double_type_node;
7304 type = build_complex_type (type);
7307 type_quals = TYPE_UNQUALIFIED;
7308 if (declspecs->specs[(int)ds_const])
7309 type_quals |= TYPE_QUAL_CONST;
7310 if (declspecs->specs[(int)ds_volatile])
7311 type_quals |= TYPE_QUAL_VOLATILE;
7312 if (declspecs->specs[(int)ds_restrict])
7313 type_quals |= TYPE_QUAL_RESTRICT;
7314 if (sfk == sfk_conversion && type_quals != TYPE_UNQUALIFIED)
7315 error ("qualifiers are not allowed on declaration of %<operator %T%>",
7318 if (TREE_CODE (type) == FUNCTION_TYPE
7319 && type_quals != TYPE_UNQUALIFIED)
7321 /* This was an error in C++98 (cv-qualifiers cannot be added to
7322 a function type), but DR 295 makes the code well-formed by
7323 dropping the extra qualifiers. */
7326 tree bad_type = build_qualified_type (type, type_quals);
7327 pedwarn ("ignoring %qV qualifiers added to function type %qT",
7330 type_quals = TYPE_UNQUALIFIED;
7332 type_quals |= cp_type_quals (type);
7333 type = cp_build_qualified_type_real
7334 (type, type_quals, ((typedef_decl && !DECL_ARTIFICIAL (typedef_decl)
7335 ? tf_ignore_bad_quals : 0) | tf_warning_or_error));
7336 /* We might have ignored or rejected some of the qualifiers. */
7337 type_quals = cp_type_quals (type);
7340 inlinep = !! declspecs->specs[(int)ds_inline];
7341 virtualp = !! declspecs->specs[(int)ds_virtual];
7342 explicitp = !! declspecs->specs[(int)ds_explicit];
7344 storage_class = declspecs->storage_class;
7345 if (storage_class == sc_static)
7346 staticp = 1 + (decl_context == FIELD);
7348 if (virtualp && staticp == 2)
7350 error ("member %qD cannot be declared both virtual and static", dname);
7351 storage_class = sc_none;
7354 friendp = !! declspecs->specs[(int)ds_friend];
7356 if (dependent_name && !friendp)
7358 error ("%<%T::%D%> is not a valid declarator", ctype, dependent_name);
7359 return error_mark_node;
7362 /* Issue errors about use of storage classes for parameters. */
7363 if (decl_context == PARM)
7365 if (declspecs->specs[(int)ds_typedef])
7367 error ("typedef declaration invalid in parameter declaration");
7368 return error_mark_node;
7370 else if (storage_class == sc_static
7371 || storage_class == sc_extern
7373 error ("storage class specifiers invalid in parameter declarations");
7376 /* Give error if `virtual' is used outside of class declaration. */
7378 && (current_class_name == NULL_TREE || decl_context != FIELD))
7380 error ("virtual outside class declaration");
7384 /* Static anonymous unions are dealt with here. */
7385 if (staticp && decl_context == TYPENAME
7387 && ANON_AGGR_TYPE_P (declspecs->type))
7388 decl_context = FIELD;
7390 /* Warn about storage classes that are invalid for certain
7391 kinds of declarations (parameters, typenames, etc.). */
7392 if (declspecs->multiple_storage_classes_p)
7394 error ("multiple storage classes in declaration of %qs", name);
7395 storage_class = sc_none;
7399 && storage_class != sc_extern
7400 && storage_class != sc_static)
7401 || declspecs->specs[(int)ds_typedef]))
7403 error ("multiple storage classes in declaration of %qs", name);
7406 else if (decl_context != NORMAL
7407 && ((storage_class != sc_none
7408 && storage_class != sc_mutable)
7411 if ((decl_context == PARM || decl_context == CATCHPARM)
7412 && (storage_class == sc_register
7413 || storage_class == sc_auto))
7415 else if (declspecs->specs[(int)ds_typedef])
7417 else if (decl_context == FIELD
7418 /* C++ allows static class elements. */
7419 && storage_class == sc_static)
7420 /* C++ also allows inlines and signed and unsigned elements,
7421 but in those cases we don't come in here. */
7425 if (decl_context == FIELD)
7426 error ("storage class specified for %qs", name);
7429 if (decl_context == PARM || decl_context == CATCHPARM)
7430 error ("storage class specified for parameter %qs", name);
7432 error ("storage class specified for typename");
7434 if (storage_class == sc_register
7435 || storage_class == sc_auto
7436 || storage_class == sc_extern
7438 storage_class = sc_none;
7441 else if (storage_class == sc_extern && initialized
7444 if (toplevel_bindings_p ())
7446 /* It's common practice (and completely valid) to have a const
7447 be initialized and declared extern. */
7448 if (!(type_quals & TYPE_QUAL_CONST))
7449 warning (0, "%qs initialized and declared %<extern%>", name);
7452 error ("%qs has both %<extern%> and initializer", name);
7454 else if (storage_class == sc_extern && funcdef_flag
7455 && ! toplevel_bindings_p ())
7456 error ("nested function %qs declared %<extern%>", name);
7457 else if (toplevel_bindings_p ())
7459 if (storage_class == sc_auto)
7460 error ("top-level declaration of %qs specifies %<auto%>", name);
7463 && storage_class != sc_extern
7464 && storage_class != sc_static)
7466 error ("function-scope %qs implicitly auto and declared %<__thread%>",
7471 if (storage_class && friendp)
7472 error ("storage class specifiers invalid in friend function declarations");
7475 unqualified_id = NULL_TREE;
7478 unqualified_id = id_declarator->u.id.unqualified_name;
7479 switch (TREE_CODE (unqualified_id))
7483 = constructor_name (TREE_OPERAND (unqualified_id, 0));
7486 case IDENTIFIER_NODE:
7487 case TEMPLATE_ID_EXPR:
7495 /* Determine the type of the entity declared by recurring on the
7497 for (; declarator; declarator = declarator->declarator)
7499 const cp_declarator *inner_declarator;
7502 if (type == error_mark_node)
7503 return error_mark_node;
7505 attrs = declarator->attributes;
7511 if (declarator == NULL || declarator->kind == cdk_id)
7512 attr_flags |= (int) ATTR_FLAG_DECL_NEXT;
7513 if (declarator->kind == cdk_function)
7514 attr_flags |= (int) ATTR_FLAG_FUNCTION_NEXT;
7515 if (declarator->kind == cdk_array)
7516 attr_flags |= (int) ATTR_FLAG_ARRAY_NEXT;
7517 returned_attrs = decl_attributes (&type,
7518 chainon (returned_attrs, attrs),
7522 if (declarator->kind == cdk_id)
7525 inner_declarator = declarator->declarator;
7527 switch (declarator->kind)
7530 type = create_array_type_for_decl (dname, type,
7531 declarator->u.array.bounds);
7539 /* Declaring a function type.
7540 Make sure we have a valid type for the function to return. */
7542 /* We now know that the TYPE_QUALS don't apply to the
7543 decl, but to its return type. */
7544 type_quals = TYPE_UNQUALIFIED;
7546 /* Warn about some types functions can't return. */
7548 if (TREE_CODE (type) == FUNCTION_TYPE)
7550 error ("%qs declared as function returning a function", name);
7551 type = integer_type_node;
7553 if (TREE_CODE (type) == ARRAY_TYPE)
7555 error ("%qs declared as function returning an array", name);
7556 type = integer_type_node;
7559 /* Pick up type qualifiers which should be applied to `this'. */
7560 memfn_quals = declarator->u.function.qualifiers;
7562 /* Pick up the exception specifications. */
7563 raises = declarator->u.function.exception_specification;
7565 /* Say it's a definition only for the CALL_EXPR
7566 closest to the identifier. */
7567 funcdecl_p = inner_declarator && inner_declarator->kind == cdk_id;
7569 if (ctype == NULL_TREE
7570 && decl_context == FIELD
7572 && (friendp == 0 || dname == current_class_name))
7573 ctype = current_class_type;
7575 if (ctype && (sfk == sfk_constructor
7576 || sfk == sfk_destructor))
7578 /* We are within a class's scope. If our declarator name
7579 is the same as the class name, and we are defining
7580 a function, then it is a constructor/destructor, and
7581 therefore returns a void type. */
7583 /* ISO C++ 12.4/2. A destructor may not be declared
7584 const or volatile. A destructor may not be
7587 ISO C++ 12.1. A constructor may not be declared
7588 const or volatile. A constructor may not be
7589 virtual. A constructor may not be static. */
7591 error ((flags == DTOR_FLAG)
7592 ? "destructor cannot be static member function"
7593 : "constructor cannot be static member function");
7596 error ((flags == DTOR_FLAG)
7597 ? "destructors may not be cv-qualified"
7598 : "constructors may not be cv-qualified");
7599 memfn_quals = TYPE_UNQUALIFIED;
7602 if (decl_context == FIELD
7603 && !member_function_or_else (ctype,
7606 return error_mark_node;
7608 if (flags != DTOR_FLAG)
7610 /* It's a constructor. */
7615 pedwarn ("constructors cannot be declared virtual");
7618 if (decl_context == FIELD
7619 && sfk != sfk_constructor)
7620 return error_mark_node;
7622 if (decl_context == FIELD)
7628 error ("can't initialize friend function %qs", name);
7631 /* Cannot be both friend and virtual. */
7632 error ("virtual functions cannot be friends");
7635 if (decl_context == NORMAL)
7636 error ("friend declaration not in class definition");
7637 if (current_function_decl && funcdef_flag)
7638 error ("can't define friend function %qs in a local "
7643 arg_types = grokparms (declarator->u.function.parameters,
7646 if (inner_declarator
7647 && inner_declarator->kind == cdk_id
7648 && inner_declarator->u.id.sfk == sfk_destructor
7649 && arg_types != void_list_node)
7651 error ("destructors may not have parameters");
7652 arg_types = void_list_node;
7656 type = build_function_type (type, arg_types);
7663 /* Filter out pointers-to-references and references-to-references.
7664 We can get these if a TYPE_DECL is used. */
7666 if (TREE_CODE (type) == REFERENCE_TYPE)
7668 error (declarator->kind == cdk_reference
7669 ? "cannot declare reference to %q#T"
7670 : "cannot declare pointer to %q#T", type);
7671 type = TREE_TYPE (type);
7673 else if (VOID_TYPE_P (type))
7675 if (declarator->kind == cdk_reference)
7676 error ("cannot declare reference to %q#T", type);
7677 else if (declarator->kind == cdk_ptrmem)
7678 error ("cannot declare pointer to %q#T member", type);
7681 /* We now know that the TYPE_QUALS don't apply to the decl,
7682 but to the target of the pointer. */
7683 type_quals = TYPE_UNQUALIFIED;
7685 if (declarator->kind == cdk_ptrmem
7686 && (TREE_CODE (type) == FUNCTION_TYPE || memfn_quals))
7688 memfn_quals |= cp_type_quals (type);
7689 type = build_memfn_type (type,
7690 declarator->u.pointer.class_type,
7692 memfn_quals = TYPE_UNQUALIFIED;
7695 if (declarator->kind == cdk_reference)
7697 if (!VOID_TYPE_P (type))
7698 type = build_reference_type (type);
7700 else if (TREE_CODE (type) == METHOD_TYPE)
7701 type = build_ptrmemfunc_type (build_pointer_type (type));
7702 else if (declarator->kind == cdk_ptrmem)
7704 gcc_assert (TREE_CODE (declarator->u.pointer.class_type)
7706 if (declarator->u.pointer.class_type == error_mark_node)
7707 /* We will already have complained. */
7708 type = error_mark_node;
7710 type = build_ptrmem_type (declarator->u.pointer.class_type,
7714 type = build_pointer_type (type);
7716 /* Process a list of type modifier keywords (such as
7717 const or volatile) that were given inside the `*' or `&'. */
7719 if (declarator->u.pointer.qualifiers)
7722 = cp_build_qualified_type (type,
7723 declarator->u.pointer.qualifiers);
7724 type_quals = cp_type_quals (type);
7737 if (unqualified_id && TREE_CODE (unqualified_id) == TEMPLATE_ID_EXPR
7738 && TREE_CODE (type) != FUNCTION_TYPE
7739 && TREE_CODE (type) != METHOD_TYPE)
7741 error ("template-id %qD used as a declarator",
7743 unqualified_id = dname;
7746 /* If TYPE is a FUNCTION_TYPE, but the function name was explicitly
7747 qualified with a class-name, turn it into a METHOD_TYPE, unless
7748 we know that the function is static. We take advantage of this
7749 opportunity to do other processing that pertains to entities
7750 explicitly declared to be class members. Note that if DECLARATOR
7751 is non-NULL, we know it is a cdk_id declarator; otherwise, we
7752 would not have exited the loop above. */
7754 && declarator->u.id.qualifying_scope
7755 && TYPE_P (declarator->u.id.qualifying_scope))
7759 ctype = declarator->u.id.qualifying_scope;
7760 ctype = TYPE_MAIN_VARIANT (ctype);
7762 while (t != NULL_TREE && CLASS_TYPE_P (t))
7764 /* You're supposed to have one `template <...>' for every
7765 template class, but you don't need one for a full
7766 specialization. For example:
7768 template <class T> struct S{};
7769 template <> struct S<int> { void f(); };
7770 void S<int>::f () {}
7772 is correct; there shouldn't be a `template <>' for the
7773 definition of `S<int>::f'. */
7774 if (CLASSTYPE_TEMPLATE_SPECIALIZATION (t)
7775 && !any_dependent_template_arguments_p (CLASSTYPE_TI_ARGS (t)))
7776 /* T is an explicit (not partial) specialization. All
7777 containing classes must therefore also be explicitly
7780 if ((CLASSTYPE_USE_TEMPLATE (t) || CLASSTYPE_IS_TEMPLATE (t))
7781 && PRIMARY_TEMPLATE_P (CLASSTYPE_TI_TEMPLATE (t)))
7782 template_count += 1;
7784 t = TYPE_MAIN_DECL (t);
7785 t = DECL_CONTEXT (t);
7788 if (ctype == current_class_type)
7791 pedwarn ("member functions are implicitly friends of their class");
7793 pedwarn ("extra qualification %<%T::%> on member %qs",
7796 else if (/* If the qualifying type is already complete, then we
7797 can skip the following checks. */
7798 !COMPLETE_TYPE_P (ctype)
7799 && (/* If the function is being defined, then
7800 qualifying type must certainly be complete. */
7802 /* A friend declaration of "T::f" is OK, even if
7803 "T" is a template parameter. But, if this
7804 function is not a friend, the qualifying type
7806 || (!friendp && !CLASS_TYPE_P (ctype))
7807 /* For a declaration, the type need not be
7808 complete, if either it is dependent (since there
7809 is no meaningful definition of complete in that
7810 case) or the qualifying class is currently being
7812 || !(dependent_type_p (ctype)
7813 || currently_open_class (ctype)))
7814 /* Check that the qualifying type is complete. */
7815 && !complete_type_or_else (ctype, NULL_TREE))
7816 return error_mark_node;
7817 else if (TREE_CODE (type) == FUNCTION_TYPE)
7819 tree sname = declarator->u.id.unqualified_name;
7821 if (current_class_type
7822 && (!friendp || funcdef_flag))
7825 ? "cannot define member function %<%T::%s%> within %<%T%>"
7826 : "cannot declare member function %<%T::%s%> within %<%T%>",
7827 ctype, name, current_class_type);
7828 return error_mark_node;
7831 if (TREE_CODE (sname) == IDENTIFIER_NODE
7832 && NEW_DELETE_OPNAME_P (sname))
7833 /* Overloaded operator new and operator delete
7834 are always static functions. */
7837 type = build_memfn_type (type, ctype, memfn_quals);
7839 else if (declspecs->specs[(int)ds_typedef]
7840 && current_class_type)
7842 error ("cannot declare member %<%T::%s%> within %qT",
7843 ctype, name, current_class_type);
7844 return error_mark_node;
7848 /* Now TYPE has the actual type. */
7853 *attrlist = chainon (returned_attrs, *attrlist);
7855 attrlist = &returned_attrs;
7858 /* Did array size calculations overflow? */
7860 if (TREE_CODE (type) == ARRAY_TYPE
7861 && COMPLETE_TYPE_P (type)
7862 && TREE_CODE (TYPE_SIZE_UNIT (type)) == INTEGER_CST
7863 && TREE_OVERFLOW (TYPE_SIZE_UNIT (type)))
7865 error ("size of array %qs is too large", name);
7866 /* If we proceed with the array type as it is, we'll eventually
7867 crash in tree_low_cst(). */
7868 type = error_mark_node;
7871 if ((decl_context == FIELD || decl_context == PARM)
7872 && !processing_template_decl
7873 && variably_modified_type_p (type, NULL_TREE))
7875 if (decl_context == FIELD)
7876 error ("data member may not have variably modified type %qT", type);
7878 error ("parameter may not have variably modified type %qT", type);
7879 type = error_mark_node;
7882 if (explicitp == 1 || (explicitp && friendp))
7884 /* [dcl.fct.spec] The explicit specifier shall only be used in
7885 declarations of constructors within a class definition. */
7886 error ("only declarations of constructors can be %<explicit%>");
7890 if (storage_class == sc_mutable)
7892 if (decl_context != FIELD || friendp)
7894 error ("non-member %qs cannot be declared %<mutable%>", name);
7895 storage_class = sc_none;
7897 else if (decl_context == TYPENAME || declspecs->specs[(int)ds_typedef])
7899 error ("non-object member %qs cannot be declared %<mutable%>", name);
7900 storage_class = sc_none;
7902 else if (TREE_CODE (type) == FUNCTION_TYPE
7903 || TREE_CODE (type) == METHOD_TYPE)
7905 error ("function %qs cannot be declared %<mutable%>", name);
7906 storage_class = sc_none;
7910 error ("static %qs cannot be declared %<mutable%>", name);
7911 storage_class = sc_none;
7913 else if (type_quals & TYPE_QUAL_CONST)
7915 error ("const %qs cannot be declared %<mutable%>", name);
7916 storage_class = sc_none;
7920 /* If this is declaring a typedef name, return a TYPE_DECL. */
7921 if (declspecs->specs[(int)ds_typedef] && decl_context != TYPENAME)
7925 /* Note that the grammar rejects storage classes
7926 in typenames, fields or parameters. */
7927 if (current_lang_name == lang_name_java)
7928 TYPE_FOR_JAVA (type) = 1;
7930 /* This declaration:
7932 typedef void f(int) const;
7934 declares a function type which is not a member of any
7935 particular class, but which is cv-qualified; for
7936 example "f S::*" declares a pointer to a const-qualified
7937 member function of S. We record the cv-qualification in the
7939 if (memfn_quals && TREE_CODE (type) == FUNCTION_TYPE)
7940 type = cp_build_qualified_type (type, memfn_quals);
7942 if (decl_context == FIELD)
7943 decl = build_lang_decl (TYPE_DECL, unqualified_id, type);
7945 decl = build_decl (TYPE_DECL, unqualified_id, type);
7946 if (id_declarator && declarator->u.id.qualifying_scope)
7947 error ("%Jtypedef name may not be a nested-name-specifier", decl);
7949 if (decl_context != FIELD)
7951 if (!current_function_decl)
7952 DECL_CONTEXT (decl) = FROB_CONTEXT (current_namespace);
7953 else if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (current_function_decl)
7954 || (DECL_MAYBE_IN_CHARGE_DESTRUCTOR_P
7955 (current_function_decl)))
7956 /* The TYPE_DECL is "abstract" because there will be
7957 clones of this constructor/destructor, and there will
7958 be copies of this TYPE_DECL generated in those
7960 DECL_ABSTRACT (decl) = 1;
7962 else if (constructor_name_p (unqualified_id, current_class_type))
7963 pedwarn ("ISO C++ forbids nested type %qD with same name "
7964 "as enclosing class",
7967 /* If the user declares "typedef struct {...} foo" then the
7968 struct will have an anonymous name. Fill that name in now.
7969 Nothing can refer to it, so nothing needs know about the name
7971 if (type != error_mark_node
7974 && TREE_CODE (TYPE_NAME (type)) == TYPE_DECL
7975 && TYPE_ANONYMOUS_P (type)
7976 /* Don't do this if there are attributes. */
7977 && (!attrlist || !*attrlist)
7978 && cp_type_quals (type) == TYPE_UNQUALIFIED)
7980 tree oldname = TYPE_NAME (type);
7983 /* Replace the anonymous name with the real name everywhere. */
7984 for (t = TYPE_MAIN_VARIANT (type); t; t = TYPE_NEXT_VARIANT (t))
7985 if (TYPE_NAME (t) == oldname)
7986 TYPE_NAME (t) = decl;
7988 if (TYPE_LANG_SPECIFIC (type))
7989 TYPE_WAS_ANONYMOUS (type) = 1;
7991 /* If this is a typedef within a template class, the nested
7992 type is a (non-primary) template. The name for the
7993 template needs updating as well. */
7994 if (TYPE_LANG_SPECIFIC (type) && CLASSTYPE_TEMPLATE_INFO (type))
7995 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type))
7996 = TYPE_IDENTIFIER (type);
7998 /* FIXME remangle member functions; member functions of a
7999 type with external linkage have external linkage. */
8002 /* Any qualifiers on a function type typedef have already been
8004 if (memfn_quals && !ctype && TREE_CODE (type) == FUNCTION_TYPE)
8005 memfn_quals = TYPE_UNQUALIFIED;
8008 || (typedef_decl && C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl)))
8009 C_TYPEDEF_EXPLICITLY_SIGNED (decl) = 1;
8011 bad_specifiers (decl, "type", virtualp,
8012 memfn_quals != TYPE_UNQUALIFIED,
8013 inlinep, friendp, raises != NULL_TREE);
8018 /* Detect the case of an array type of unspecified size
8019 which came, as such, direct from a typedef name.
8020 We must copy the type, so that the array's domain can be
8021 individually set by the object's initializer. */
8023 if (type && typedef_type
8024 && TREE_CODE (type) == ARRAY_TYPE && !TYPE_DOMAIN (type)
8025 && TYPE_MAIN_VARIANT (type) == TYPE_MAIN_VARIANT (typedef_type))
8026 type = build_cplus_array_type (TREE_TYPE (type), NULL_TREE);
8028 /* Detect where we're using a typedef of function type to declare a
8029 function. PARMS will not be set, so we must create it now. */
8031 if (type == typedef_type && TREE_CODE (type) == FUNCTION_TYPE)
8033 tree decls = NULL_TREE;
8036 for (args = TYPE_ARG_TYPES (type); args; args = TREE_CHAIN (args))
8038 tree decl = cp_build_parm_decl (NULL_TREE, TREE_VALUE (args));
8040 TREE_CHAIN (decl) = decls;
8044 parms = nreverse (decls);
8046 if (decl_context != TYPENAME)
8048 /* A cv-qualifier-seq shall only be part of the function type
8049 for a non-static member function. [8.3.5/4 dcl.fct] */
8050 if (cp_type_quals (type) != TYPE_UNQUALIFIED
8051 && (current_class_type == NULL_TREE || staticp) )
8053 error ("qualified function types cannot be used to declare %s functions",
8054 (staticp? "static member" : "free"));
8055 type = TYPE_MAIN_VARIANT (type);
8058 /* The qualifiers on the function type become the qualifiers on
8059 the non-static member function. */
8060 memfn_quals |= cp_type_quals (type);
8064 /* If this is a type name (such as, in a cast or sizeof),
8065 compute the type and return it now. */
8067 if (decl_context == TYPENAME)
8069 /* Note that the grammar rejects storage classes
8070 in typenames, fields or parameters. */
8071 if (type_quals != TYPE_UNQUALIFIED)
8072 type_quals = TYPE_UNQUALIFIED;
8074 /* Special case: "friend class foo" looks like a TYPENAME context. */
8077 if (type_quals != TYPE_UNQUALIFIED)
8079 error ("type qualifiers specified for friend class declaration");
8080 type_quals = TYPE_UNQUALIFIED;
8084 error ("%<inline%> specified for friend class declaration");
8090 /* Don't allow friend declaration without a class-key. */
8091 if (TREE_CODE (type) == TEMPLATE_TYPE_PARM)
8092 pedwarn ("template parameters cannot be friends");
8093 else if (TREE_CODE (type) == TYPENAME_TYPE)
8094 pedwarn ("friend declaration requires class-key, "
8095 "i.e. %<friend class %T::%D%>",
8096 TYPE_CONTEXT (type), TYPENAME_TYPE_FULLNAME (type));
8098 pedwarn ("friend declaration requires class-key, "
8099 "i.e. %<friend %#T%>",
8103 /* Only try to do this stuff if we didn't already give up. */
8104 if (type != integer_type_node)
8106 /* A friendly class? */
8107 if (current_class_type)
8108 make_friend_class (current_class_type, TYPE_MAIN_VARIANT (type),
8111 error ("trying to make class %qT a friend of global scope",
8114 type = void_type_node;
8117 else if (memfn_quals)
8119 if (ctype == NULL_TREE)
8121 if (TREE_CODE (type) != METHOD_TYPE)
8122 error ("invalid qualifiers on non-member function type");
8124 ctype = TYPE_METHOD_BASETYPE (type);
8127 type = build_memfn_type (type, ctype, memfn_quals);
8132 else if (unqualified_id == NULL_TREE && decl_context != PARM
8133 && decl_context != CATCHPARM
8134 && TREE_CODE (type) != UNION_TYPE
8137 error ("abstract declarator %qT used as declaration", type);
8138 return error_mark_node;
8141 /* Only functions may be declared using an operator-function-id. */
8143 && IDENTIFIER_OPNAME_P (unqualified_id)
8144 && TREE_CODE (type) != FUNCTION_TYPE
8145 && TREE_CODE (type) != METHOD_TYPE)
8147 error ("declaration of %qD as non-function", unqualified_id);
8148 return error_mark_node;
8151 /* We don't check parameter types here because we can emit a better
8152 error message later. */
8153 if (decl_context != PARM)
8154 type = check_var_type (unqualified_id, type);
8156 /* Now create the decl, which may be a VAR_DECL, a PARM_DECL
8157 or a FUNCTION_DECL, depending on DECL_CONTEXT and TYPE. */
8159 if (decl_context == PARM || decl_context == CATCHPARM)
8161 if (ctype || in_namespace)
8162 error ("cannot use %<::%> in parameter declaration");
8164 /* A parameter declared as an array of T is really a pointer to T.
8165 One declared as a function is really a pointer to a function.
8166 One declared as a member is really a pointer to member. */
8168 if (TREE_CODE (type) == ARRAY_TYPE)
8170 /* Transfer const-ness of array into that of type pointed to. */
8171 type = build_pointer_type (TREE_TYPE (type));
8172 type_quals = TYPE_UNQUALIFIED;
8174 else if (TREE_CODE (type) == FUNCTION_TYPE)
8175 type = build_pointer_type (type);
8181 if (decl_context == PARM)
8183 decl = cp_build_parm_decl (unqualified_id, type);
8185 bad_specifiers (decl, "parameter", virtualp,
8186 memfn_quals != TYPE_UNQUALIFIED,
8187 inlinep, friendp, raises != NULL_TREE);
8189 else if (decl_context == FIELD)
8191 /* The C99 flexible array extension. */
8192 if (!staticp && TREE_CODE (type) == ARRAY_TYPE
8193 && TYPE_DOMAIN (type) == NULL_TREE)
8195 tree itype = compute_array_index_type (dname, integer_zero_node);
8196 type = build_cplus_array_type (TREE_TYPE (type), itype);
8199 if (type == error_mark_node)
8201 /* Happens when declaring arrays of sizes which
8202 are error_mark_node, for example. */
8205 else if (in_namespace && !friendp)
8207 /* Something like struct S { int N::j; }; */
8208 error ("invalid use of %<::%>");
8209 return error_mark_node;
8211 else if (TREE_CODE (type) == FUNCTION_TYPE)
8214 tree function_context;
8218 if (ctype == NULL_TREE)
8219 ctype = current_class_type;
8221 if (ctype == NULL_TREE)
8223 error ("can't make %qD into a method -- not in a class",
8225 return error_mark_node;
8228 /* ``A union may [ ... ] not [ have ] virtual functions.''
8230 if (virtualp && TREE_CODE (ctype) == UNION_TYPE)
8232 error ("function %qD declared virtual inside a union",
8234 return error_mark_node;
8237 if (NEW_DELETE_OPNAME_P (unqualified_id))
8241 error ("%qD cannot be declared virtual, since it "
8247 else if (staticp < 2)
8248 type = build_memfn_type (type, ctype, memfn_quals);
8251 /* Check that the name used for a destructor makes sense. */
8252 if (sfk == sfk_destructor)
8256 gcc_assert (friendp);
8257 error ("expected qualified name in friend declaration "
8258 "for destructor %qD",
8259 id_declarator->u.id.unqualified_name);
8260 return error_mark_node;
8263 if (!same_type_p (TREE_OPERAND
8264 (id_declarator->u.id.unqualified_name, 0),
8267 error ("declaration of %qD as member of %qT",
8268 id_declarator->u.id.unqualified_name, ctype);
8269 return error_mark_node;
8273 /* Tell grokfndecl if it needs to set TREE_PUBLIC on the node. */
8274 function_context = (ctype != NULL_TREE) ?
8275 decl_function_context (TYPE_MAIN_DECL (ctype)) : NULL_TREE;
8276 publicp = (! friendp || ! staticp)
8277 && function_context == NULL_TREE;
8278 decl = grokfndecl (ctype, type,
8279 TREE_CODE (unqualified_id) != TEMPLATE_ID_EXPR
8280 ? unqualified_id : dname,
8283 virtualp, flags, memfn_quals, raises,
8284 friendp ? -1 : 0, friendp, publicp, inlinep,
8286 funcdef_flag, template_count, in_namespace, attrlist);
8287 if (decl == NULL_TREE)
8288 return error_mark_node;
8290 /* This clobbers the attrs stored in `decl' from `attrlist'. */
8291 /* The decl and setting of decl_attr is also turned off. */
8292 decl = build_decl_attribute_variant (decl, decl_attr);
8295 /* [class.conv.ctor]
8297 A constructor declared without the function-specifier
8298 explicit that can be called with a single parameter
8299 specifies a conversion from the type of its first
8300 parameter to the type of its class. Such a constructor
8301 is called a converting constructor. */
8303 DECL_NONCONVERTING_P (decl) = 1;
8304 else if (DECL_CONSTRUCTOR_P (decl))
8306 /* The constructor can be called with exactly one
8307 parameter if there is at least one parameter, and
8308 any subsequent parameters have default arguments.
8309 Ignore any compiler-added parms. */
8310 tree arg_types = FUNCTION_FIRST_USER_PARMTYPE (decl);
8312 if (arg_types == void_list_node
8314 && TREE_CHAIN (arg_types)
8315 && TREE_CHAIN (arg_types) != void_list_node
8316 && !TREE_PURPOSE (TREE_CHAIN (arg_types))))
8317 DECL_NONCONVERTING_P (decl) = 1;
8320 else if (TREE_CODE (type) == METHOD_TYPE)
8322 /* We only get here for friend declarations of
8323 members of other classes. */
8324 /* All method decls are public, so tell grokfndecl to set
8325 TREE_PUBLIC, also. */
8326 decl = grokfndecl (ctype, type,
8327 TREE_CODE (unqualified_id) != TEMPLATE_ID_EXPR
8328 ? unqualified_id : dname,
8331 virtualp, flags, memfn_quals, raises,
8332 friendp ? -1 : 0, friendp, 1, 0, sfk,
8333 funcdef_flag, template_count, in_namespace,
8335 if (decl == NULL_TREE)
8336 return error_mark_node;
8338 else if (!staticp && !dependent_type_p (type)
8339 && !COMPLETE_TYPE_P (complete_type (type))
8340 && (TREE_CODE (type) != ARRAY_TYPE || initialized == 0))
8343 error ("field %qD has incomplete type", unqualified_id);
8345 error ("name %qT has incomplete type", type);
8347 /* If we're instantiating a template, tell them which
8348 instantiation made the field's type be incomplete. */
8349 if (current_class_type
8350 && TYPE_NAME (current_class_type)
8351 && IDENTIFIER_TEMPLATE (TYPE_IDENTIFIER (current_class_type))
8353 && declspecs->type == type)
8354 error (" in instantiation of template %qT",
8355 current_class_type);
8357 return error_mark_node;
8363 error ("%qE is neither function nor member function; "
8364 "cannot be declared friend", unqualified_id);
8372 /* Friends are treated specially. */
8373 if (ctype == current_class_type)
8374 ; /* We already issued a pedwarn. */
8375 else if (decl && DECL_NAME (decl))
8377 if (template_class_depth (current_class_type) == 0)
8379 decl = check_explicit_specialization
8380 (unqualified_id, decl, template_count,
8381 2 * funcdef_flag + 4);
8382 if (decl == error_mark_node)
8383 return error_mark_node;
8386 decl = do_friend (ctype, unqualified_id, decl,
8392 return error_mark_node;
8395 /* Structure field. It may not be a function, except for C++. */
8397 if (decl == NULL_TREE)
8403 /* An attempt is being made to initialize a non-static
8404 member. But, from [class.mem]:
8406 4 A member-declarator can contain a
8407 constant-initializer only if it declares a static
8408 member (_class.static_) of integral or enumeration
8409 type, see _class.static.data_.
8411 This used to be relatively common practice, but
8412 the rest of the compiler does not correctly
8413 handle the initialization unless the member is
8414 static so we make it static below. */
8415 pedwarn ("ISO C++ forbids initialization of member %qD",
8417 pedwarn ("making %qD static", unqualified_id);
8421 if (uses_template_parms (type))
8422 /* We'll check at instantiation time. */
8424 else if (check_static_variable_definition (unqualified_id,
8426 /* If we just return the declaration, crashes
8427 will sometimes occur. We therefore return
8428 void_type_node, as if this was a friend
8429 declaration, to cause callers to completely
8430 ignore this declaration. */
8431 return error_mark_node;
8436 /* C++ allows static class members. All other work
8437 for this is done by grokfield. */
8438 decl = build_lang_decl (VAR_DECL, unqualified_id, type);
8439 set_linkage_for_static_data_member (decl);
8440 /* Even if there is an in-class initialization, DECL
8441 is considered undefined until an out-of-class
8442 definition is provided. */
8443 DECL_EXTERNAL (decl) = 1;
8447 if (targetm.have_tls)
8448 DECL_TLS_MODEL (decl) = decl_default_tls_model (decl);
8450 /* A mere warning is sure to result in improper
8451 semantics at runtime. Don't bother to allow this to
8453 error ("thread-local storage not supported for this target");
8458 decl = build_decl (FIELD_DECL, unqualified_id, type);
8459 DECL_NONADDRESSABLE_P (decl) = bitfield;
8460 if (storage_class == sc_mutable)
8462 DECL_MUTABLE_P (decl) = 1;
8463 storage_class = sc_none;
8467 bad_specifiers (decl, "field", virtualp,
8468 memfn_quals != TYPE_UNQUALIFIED,
8469 inlinep, friendp, raises != NULL_TREE);
8472 else if (TREE_CODE (type) == FUNCTION_TYPE
8473 || TREE_CODE (type) == METHOD_TYPE)
8478 if (!unqualified_id)
8479 return error_mark_node;
8481 if (TREE_CODE (unqualified_id) == TEMPLATE_ID_EXPR)
8482 original_name = dname;
8484 original_name = unqualified_id;
8486 if (storage_class == sc_auto)
8487 error ("storage class %<auto%> invalid for function %qs", name);
8488 else if (storage_class == sc_register)
8489 error ("storage class %<register%> invalid for function %qs", name);
8491 error ("storage class %<__thread%> invalid for function %qs", name);
8493 /* Function declaration not at top level.
8494 Storage classes other than `extern' are not allowed
8495 and `extern' makes no difference. */
8496 if (! toplevel_bindings_p ()
8497 && (storage_class == sc_static
8498 || declspecs->specs[(int)ds_inline])
8501 if (storage_class == sc_static)
8502 pedwarn ("%<static%> specified invalid for function %qs "
8503 "declared out of global scope", name);
8505 pedwarn ("%<inline%> specifier invalid for function %qs "
8506 "declared out of global scope", name);
8509 if (ctype == NULL_TREE)
8513 error ("virtual non-class function %qs", name);
8517 else if (TREE_CODE (type) == FUNCTION_TYPE && staticp < 2
8518 && !NEW_DELETE_OPNAME_P (original_name))
8519 type = build_method_type_directly (ctype,
8521 TYPE_ARG_TYPES (type));
8523 /* Record presence of `static'. */
8524 publicp = (ctype != NULL_TREE
8525 || storage_class == sc_extern
8526 || storage_class != sc_static);
8528 decl = grokfndecl (ctype, type, original_name, parms, unqualified_id,
8529 virtualp, flags, memfn_quals, raises,
8531 publicp, inlinep, sfk, funcdef_flag,
8532 template_count, in_namespace, attrlist);
8533 if (decl == NULL_TREE)
8534 return error_mark_node;
8538 int invalid_static = 0;
8540 /* Don't allow a static member function in a class, and forbid
8541 declaring main to be static. */
8542 if (TREE_CODE (type) == METHOD_TYPE)
8544 pedwarn ("cannot declare member function %qD to have "
8545 "static linkage", decl);
8548 else if (current_function_decl)
8550 /* FIXME need arm citation */
8551 error ("cannot declare static function inside another function");
8558 storage_class = sc_none;
8564 /* It's a variable. */
8566 /* An uninitialized decl with `extern' is a reference. */
8567 decl = grokvardecl (type, unqualified_id,
8570 (type_quals & TYPE_QUAL_CONST) != 0,
8571 ctype ? ctype : in_namespace);
8572 bad_specifiers (decl, "variable", virtualp,
8573 memfn_quals != TYPE_UNQUALIFIED,
8574 inlinep, friendp, raises != NULL_TREE);
8578 DECL_CONTEXT (decl) = ctype;
8581 pedwarn ("%<static%> may not be used when defining "
8582 "(as opposed to declaring) a static data member");
8584 storage_class = sc_none;
8586 if (storage_class == sc_register && TREE_STATIC (decl))
8588 error ("static member %qD declared %<register%>", decl);
8589 storage_class = sc_none;
8591 if (storage_class == sc_extern && pedantic)
8593 pedwarn ("cannot explicitly declare member %q#D to have "
8596 storage_class = sc_none;
8601 /* Record `register' declaration for warnings on &
8602 and in case doing stupid register allocation. */
8604 if (storage_class == sc_register)
8605 DECL_REGISTER (decl) = 1;
8606 else if (storage_class == sc_extern)
8607 DECL_THIS_EXTERN (decl) = 1;
8608 else if (storage_class == sc_static)
8609 DECL_THIS_STATIC (decl) = 1;
8611 /* Record constancy and volatility. There's no need to do this
8612 when processing a template; we'll do this for the instantiated
8613 declaration based on the type of DECL. */
8614 if (!processing_template_decl)
8615 cp_apply_type_quals_to_decl (type_quals, decl);
8621 /* Subroutine of start_function. Ensure that each of the parameter
8622 types (as listed in PARMS) is complete, as is required for a
8623 function definition. */
8626 require_complete_types_for_parms (tree parms)
8628 for (; parms; parms = TREE_CHAIN (parms))
8630 if (dependent_type_p (TREE_TYPE (parms)))
8632 if (!VOID_TYPE_P (TREE_TYPE (parms))
8633 && complete_type_or_else (TREE_TYPE (parms), parms))
8635 relayout_decl (parms);
8636 DECL_ARG_TYPE (parms) = type_passed_as (TREE_TYPE (parms));
8639 /* grokparms or complete_type_or_else will have already issued
8641 TREE_TYPE (parms) = error_mark_node;
8645 /* Returns nonzero if T is a local variable. */
8648 local_variable_p (tree t)
8650 if ((TREE_CODE (t) == VAR_DECL
8651 /* A VAR_DECL with a context that is a _TYPE is a static data
8653 && !TYPE_P (CP_DECL_CONTEXT (t))
8654 /* Any other non-local variable must be at namespace scope. */
8655 && !DECL_NAMESPACE_SCOPE_P (t))
8656 || (TREE_CODE (t) == PARM_DECL))
8662 /* Returns nonzero if T is an automatic local variable or a label.
8663 (These are the declarations that need to be remapped when the code
8664 containing them is duplicated.) */
8667 nonstatic_local_decl_p (tree t)
8669 return ((local_variable_p (t) && !TREE_STATIC (t))
8670 || TREE_CODE (t) == LABEL_DECL
8671 || TREE_CODE (t) == RESULT_DECL);
8674 /* Like local_variable_p, but suitable for use as a tree-walking
8678 local_variable_p_walkfn (tree *tp, int *walk_subtrees,
8679 void *data ATTRIBUTE_UNUSED)
8681 if (local_variable_p (*tp) && !DECL_ARTIFICIAL (*tp))
8683 else if (TYPE_P (*tp))
8690 /* Check that ARG, which is a default-argument expression for a
8691 parameter DECL, is valid. Returns ARG, or ERROR_MARK_NODE, if
8692 something goes wrong. DECL may also be a _TYPE node, rather than a
8693 DECL, if there is no DECL available. */
8696 check_default_argument (tree decl, tree arg)
8701 if (TREE_CODE (arg) == DEFAULT_ARG)
8702 /* We get a DEFAULT_ARG when looking at an in-class declaration
8703 with a default argument. Ignore the argument for now; we'll
8704 deal with it after the class is complete. */
8713 decl_type = TREE_TYPE (decl);
8715 if (arg == error_mark_node
8716 || decl == error_mark_node
8717 || TREE_TYPE (arg) == error_mark_node
8718 || decl_type == error_mark_node)
8719 /* Something already went wrong. There's no need to check
8721 return error_mark_node;
8723 /* [dcl.fct.default]
8725 A default argument expression is implicitly converted to the
8727 if (!TREE_TYPE (arg)
8728 || !can_convert_arg (decl_type, TREE_TYPE (arg), arg, LOOKUP_NORMAL))
8731 error ("default argument for %q#D has type %qT",
8732 decl, TREE_TYPE (arg));
8734 error ("default argument for parameter of type %qT has type %qT",
8735 decl_type, TREE_TYPE (arg));
8737 return error_mark_node;
8740 /* [dcl.fct.default]
8742 Local variables shall not be used in default argument
8745 The keyword `this' shall not be used in a default argument of a
8747 var = walk_tree_without_duplicates (&arg, local_variable_p_walkfn,
8751 error ("default argument %qE uses local variable %qD", arg, var);
8752 return error_mark_node;
8759 /* Decode the list of parameter types for a function type.
8760 Given the list of things declared inside the parens,
8761 return a list of types.
8763 If this parameter does not end with an ellipsis, we append
8766 *PARMS is set to the chain of PARM_DECLs created. */
8769 grokparms (cp_parameter_declarator *first_parm, tree *parms)
8771 tree result = NULL_TREE;
8772 tree decls = NULL_TREE;
8773 int ellipsis = !first_parm || first_parm->ellipsis_p;
8774 cp_parameter_declarator *parm;
8777 for (parm = first_parm; parm != NULL; parm = parm->next)
8779 tree type = NULL_TREE;
8780 tree init = parm->default_argument;
8784 if (parm == no_parameters)
8787 attrs = parm->decl_specifiers.attributes;
8788 parm->decl_specifiers.attributes = NULL_TREE;
8789 decl = grokdeclarator (parm->declarator, &parm->decl_specifiers,
8790 PARM, init != NULL_TREE, &attrs);
8791 if (! decl || TREE_TYPE (decl) == error_mark_node)
8795 cplus_decl_attributes (&decl, attrs, 0);
8797 type = TREE_TYPE (decl);
8798 if (VOID_TYPE_P (type))
8800 if (same_type_p (type, void_type_node)
8801 && DECL_SELF_REFERENCE_P (type)
8802 && !DECL_NAME (decl) && !result && !parm->next && !ellipsis)
8803 /* this is a parmlist of `(void)', which is ok. */
8805 cxx_incomplete_type_error (decl, type);
8806 /* It's not a good idea to actually create parameters of
8807 type `void'; other parts of the compiler assume that a
8808 void type terminates the parameter list. */
8809 type = error_mark_node;
8810 TREE_TYPE (decl) = error_mark_node;
8813 if (type != error_mark_node)
8815 /* Top-level qualifiers on the parameters are
8816 ignored for function types. */
8817 type = cp_build_qualified_type (type, 0);
8818 if (TREE_CODE (type) == METHOD_TYPE)
8820 error ("parameter %qD invalidly declared method type", decl);
8821 type = build_pointer_type (type);
8822 TREE_TYPE (decl) = type;
8824 else if (abstract_virtuals_error (decl, type))
8825 any_error = 1; /* Seems like a good idea. */
8826 else if (POINTER_TYPE_P (type))
8828 /* [dcl.fct]/6, parameter types cannot contain pointers
8829 (references) to arrays of unknown bound. */
8830 tree t = TREE_TYPE (type);
8831 int ptr = TYPE_PTR_P (type);
8837 else if (TREE_CODE (t) != ARRAY_TYPE)
8839 else if (!TYPE_DOMAIN (t))
8843 if (TREE_CODE (t) == ARRAY_TYPE)
8844 error ("parameter %qD includes %s to array of unknown "
8846 decl, ptr ? "pointer" : "reference", t);
8851 else if (init && !processing_template_decl)
8852 init = check_default_argument (decl, init);
8855 TREE_CHAIN (decl) = decls;
8857 result = tree_cons (init, type, result);
8859 decls = nreverse (decls);
8860 result = nreverse (result);
8862 result = chainon (result, void_list_node);
8869 /* D is a constructor or overloaded `operator='.
8871 Let T be the class in which D is declared. Then, this function
8874 -1 if D's is an ill-formed constructor or copy assignment operator
8875 whose first parameter is of type `T'.
8876 0 if D is not a copy constructor or copy assignment
8878 1 if D is a copy constructor or copy assignment operator whose
8879 first parameter is a reference to const qualified T.
8880 2 if D is a copy constructor or copy assignment operator whose
8881 first parameter is a reference to non-const qualified T.
8883 This function can be used as a predicate. Positive values indicate
8884 a copy constructor and nonzero values indicate a copy assignment
8894 if (!DECL_FUNCTION_MEMBER_P (d))
8895 /* Non-members are invalid. We complained, but kept the declaration. */
8898 if (TREE_CODE (d) == TEMPLATE_DECL
8899 || (DECL_TEMPLATE_INFO (d)
8900 && DECL_MEMBER_TEMPLATE_P (DECL_TI_TEMPLATE (d))))
8901 /* Instantiations of template member functions are never copy
8902 functions. Note that member functions of templated classes are
8903 represented as template functions internally, and we must
8904 accept those as copy functions. */
8907 args = FUNCTION_FIRST_USER_PARMTYPE (d);
8911 arg_type = TREE_VALUE (args);
8912 if (arg_type == error_mark_node)
8915 if (TYPE_MAIN_VARIANT (arg_type) == DECL_CONTEXT (d))
8917 /* Pass by value copy assignment operator. */
8920 else if (TREE_CODE (arg_type) == REFERENCE_TYPE
8921 && TYPE_MAIN_VARIANT (TREE_TYPE (arg_type)) == DECL_CONTEXT (d))
8923 if (CP_TYPE_CONST_P (TREE_TYPE (arg_type)))
8929 args = TREE_CHAIN (args);
8931 if (args && args != void_list_node && !TREE_PURPOSE (args))
8932 /* There are more non-optional args. */
8938 /* Remember any special properties of member function DECL. */
8940 void grok_special_member_properties (tree decl)
8944 if (!DECL_NONSTATIC_MEMBER_FUNCTION_P (decl))
8947 class_type = DECL_CONTEXT (decl);
8948 if (DECL_CONSTRUCTOR_P (decl))
8950 int ctor = copy_fn_p (decl);
8952 TYPE_HAS_CONSTRUCTOR (class_type) = 1;
8958 A non-template constructor for class X is a copy
8959 constructor if its first parameter is of type X&, const
8960 X&, volatile X& or const volatile X&, and either there
8961 are no other parameters or else all other parameters have
8962 default arguments. */
8963 TYPE_HAS_INIT_REF (class_type) = 1;
8965 TYPE_HAS_CONST_INIT_REF (class_type) = 1;
8967 else if (sufficient_parms_p (FUNCTION_FIRST_USER_PARMTYPE (decl)))
8968 TYPE_HAS_DEFAULT_CONSTRUCTOR (class_type) = 1;
8970 else if (DECL_OVERLOADED_OPERATOR_P (decl) == NOP_EXPR)
8974 A non-template assignment operator for class X is a copy
8975 assignment operator if its parameter is of type X, X&, const
8976 X&, volatile X& or const volatile X&. */
8978 int assop = copy_fn_p (decl);
8982 TYPE_HAS_ASSIGN_REF (class_type) = 1;
8984 TYPE_HAS_CONST_ASSIGN_REF (class_type) = 1;
8989 /* Check a constructor DECL has the correct form. Complains
8990 if the class has a constructor of the form X(X). */
8993 grok_ctor_properties (tree ctype, tree decl)
8995 int ctor_parm = copy_fn_p (decl);
9001 A declaration of a constructor for a class X is ill-formed if
9002 its first parameter is of type (optionally cv-qualified) X
9003 and either there are no other parameters or else all other
9004 parameters have default arguments.
9006 We *don't* complain about member template instantiations that
9007 have this form, though; they can occur as we try to decide
9008 what constructor to use during overload resolution. Since
9009 overload resolution will never prefer such a constructor to
9010 the non-template copy constructor (which is either explicitly
9011 or implicitly defined), there's no need to worry about their
9012 existence. Theoretically, they should never even be
9013 instantiated, but that's hard to forestall. */
9014 error ("invalid constructor; you probably meant %<%T (const %T&)%>",
9022 /* An operator with this code is unary, but can also be binary. */
9025 ambi_op_p (enum tree_code code)
9027 return (code == INDIRECT_REF
9028 || code == ADDR_EXPR
9029 || code == UNARY_PLUS_EXPR
9030 || code == NEGATE_EXPR
9031 || code == PREINCREMENT_EXPR
9032 || code == PREDECREMENT_EXPR);
9035 /* An operator with this name can only be unary. */
9038 unary_op_p (enum tree_code code)
9040 return (code == TRUTH_NOT_EXPR
9041 || code == BIT_NOT_EXPR
9042 || code == COMPONENT_REF
9043 || code == TYPE_EXPR);
9046 /* DECL is a declaration for an overloaded operator. If COMPLAIN is true,
9047 errors are issued for invalid declarations. */
9050 grok_op_properties (tree decl, bool complain)
9052 tree argtypes = TYPE_ARG_TYPES (TREE_TYPE (decl));
9054 int methodp = (TREE_CODE (TREE_TYPE (decl)) == METHOD_TYPE);
9055 tree name = DECL_NAME (decl);
9056 enum tree_code operator_code;
9061 /* Count the number of arguments and check for ellipsis. */
9062 for (argtype = argtypes, arity = 0;
9063 argtype && argtype != void_list_node;
9064 argtype = TREE_CHAIN (argtype))
9066 ellipsis_p = !argtype;
9068 class_type = DECL_CONTEXT (decl);
9069 if (class_type && !CLASS_TYPE_P (class_type))
9070 class_type = NULL_TREE;
9072 if (DECL_CONV_FN_P (decl))
9073 operator_code = TYPE_EXPR;
9077 #define DEF_OPERATOR(NAME, CODE, MANGLING, ARITY, ASSN_P) \
9078 if (ansi_opname (CODE) == name) \
9080 operator_code = (CODE); \
9083 else if (ansi_assopname (CODE) == name) \
9085 operator_code = (CODE); \
9086 DECL_ASSIGNMENT_OPERATOR_P (decl) = 1; \
9090 #include "operators.def"
9096 gcc_assert (operator_code != LAST_CPLUS_TREE_CODE);
9097 SET_OVERLOADED_OPERATOR_CODE (decl, operator_code);
9100 switch (operator_code)
9103 TYPE_HAS_NEW_OPERATOR (class_type) = 1;
9107 TYPE_GETS_DELETE (class_type) |= 1;
9111 TYPE_HAS_ARRAY_NEW_OPERATOR (class_type) = 1;
9114 case VEC_DELETE_EXPR:
9115 TYPE_GETS_DELETE (class_type) |= 2;
9122 /* [basic.std.dynamic.allocation]/1:
9124 A program is ill-formed if an allocation function is declared
9125 in a namespace scope other than global scope or declared static
9128 The same also holds true for deallocation functions. */
9129 if (operator_code == NEW_EXPR || operator_code == VEC_NEW_EXPR
9130 || operator_code == DELETE_EXPR || operator_code == VEC_DELETE_EXPR)
9132 if (DECL_NAMESPACE_SCOPE_P (decl))
9134 if (CP_DECL_CONTEXT (decl) != global_namespace)
9135 error ("%qD may not be declared within a namespace", decl);
9136 else if (!TREE_PUBLIC (decl))
9137 error ("%qD may not be declared as static", decl);
9141 if (operator_code == NEW_EXPR || operator_code == VEC_NEW_EXPR)
9142 TREE_TYPE (decl) = coerce_new_type (TREE_TYPE (decl));
9143 else if (operator_code == DELETE_EXPR || operator_code == VEC_DELETE_EXPR)
9144 TREE_TYPE (decl) = coerce_delete_type (TREE_TYPE (decl));
9147 /* An operator function must either be a non-static member function
9148 or have at least one parameter of a class, a reference to a class,
9149 an enumeration, or a reference to an enumeration. 13.4.0.6 */
9150 if (! methodp || DECL_STATIC_FUNCTION_P (decl))
9152 if (operator_code == TYPE_EXPR
9153 || operator_code == CALL_EXPR
9154 || operator_code == COMPONENT_REF
9155 || operator_code == ARRAY_REF
9156 || operator_code == NOP_EXPR)
9158 error ("%qD must be a nonstatic member function", decl);
9165 if (DECL_STATIC_FUNCTION_P (decl))
9167 error ("%qD must be either a non-static member "
9168 "function or a non-member function", decl);
9172 for (p = argtypes; p && p != void_list_node; p = TREE_CHAIN (p))
9174 tree arg = non_reference (TREE_VALUE (p));
9175 if (arg == error_mark_node)
9178 /* IS_AGGR_TYPE, rather than CLASS_TYPE_P, is used
9179 because these checks are performed even on
9180 template functions. */
9181 if (IS_AGGR_TYPE (arg) || TREE_CODE (arg) == ENUMERAL_TYPE)
9185 if (!p || p == void_list_node)
9190 error ("%qD must have an argument of class or "
9197 /* There are no restrictions on the arguments to an overloaded
9199 if (operator_code == CALL_EXPR)
9202 /* Warn about conversion operators that will never be used. */
9203 if (IDENTIFIER_TYPENAME_P (name)
9204 && ! DECL_TEMPLATE_INFO (decl)
9206 /* Warn only declaring the function; there is no need to
9207 warn again about out-of-class definitions. */
9208 && class_type == current_class_type)
9210 tree t = TREE_TYPE (name);
9211 int ref = (TREE_CODE (t) == REFERENCE_TYPE);
9212 const char *what = 0;
9215 t = TYPE_MAIN_VARIANT (TREE_TYPE (t));
9217 if (TREE_CODE (t) == VOID_TYPE)
9219 else if (class_type)
9221 if (t == class_type)
9222 what = "the same type";
9223 /* Don't force t to be complete here. */
9224 else if (IS_AGGR_TYPE (t)
9225 && COMPLETE_TYPE_P (t)
9226 && DERIVED_FROM_P (t, class_type))
9227 what = "a base class";
9231 warning (OPT_Wconversion, "conversion to %s%s will never use a type "
9232 "conversion operator",
9233 ref ? "a reference to " : "", what);
9236 if (operator_code == COND_EXPR)
9239 error ("ISO C++ prohibits overloading operator ?:");
9241 else if (ellipsis_p)
9242 error ("%qD must not have variable number of arguments", decl);
9243 else if (ambi_op_p (operator_code))
9246 /* We pick the one-argument operator codes by default, so
9247 we don't have to change anything. */
9249 else if (arity == 2)
9251 /* If we thought this was a unary operator, we now know
9252 it to be a binary operator. */
9253 switch (operator_code)
9256 operator_code = MULT_EXPR;
9260 operator_code = BIT_AND_EXPR;
9263 case UNARY_PLUS_EXPR:
9264 operator_code = PLUS_EXPR;
9268 operator_code = MINUS_EXPR;
9271 case PREINCREMENT_EXPR:
9272 operator_code = POSTINCREMENT_EXPR;
9275 case PREDECREMENT_EXPR:
9276 operator_code = POSTDECREMENT_EXPR;
9283 SET_OVERLOADED_OPERATOR_CODE (decl, operator_code);
9285 if ((operator_code == POSTINCREMENT_EXPR
9286 || operator_code == POSTDECREMENT_EXPR)
9287 && ! processing_template_decl
9288 && ! same_type_p (TREE_VALUE (TREE_CHAIN (argtypes)), integer_type_node))
9291 error ("postfix %qD must take %<int%> as its argument",
9295 ("postfix %qD must take %<int%> as its second argument",
9302 error ("%qD must take either zero or one argument", decl);
9304 error ("%qD must take either one or two arguments", decl);
9307 /* More Effective C++ rule 6. */
9309 && (operator_code == POSTINCREMENT_EXPR
9310 || operator_code == POSTDECREMENT_EXPR
9311 || operator_code == PREINCREMENT_EXPR
9312 || operator_code == PREDECREMENT_EXPR))
9314 tree arg = TREE_VALUE (argtypes);
9315 tree ret = TREE_TYPE (TREE_TYPE (decl));
9316 if (methodp || TREE_CODE (arg) == REFERENCE_TYPE)
9317 arg = TREE_TYPE (arg);
9318 arg = TYPE_MAIN_VARIANT (arg);
9319 if (operator_code == PREINCREMENT_EXPR
9320 || operator_code == PREDECREMENT_EXPR)
9322 if (TREE_CODE (ret) != REFERENCE_TYPE
9323 || !same_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (ret)),
9325 warning (OPT_Weffc__, "prefix %qD should return %qT", decl,
9326 build_reference_type (arg));
9330 if (!same_type_p (TYPE_MAIN_VARIANT (ret), arg))
9331 warning (OPT_Weffc__, "postfix %qD should return %qT", decl, arg);
9335 else if (unary_op_p (operator_code))
9340 error ("%qD must take %<void%>", decl);
9342 error ("%qD must take exactly one argument", decl);
9345 else /* if (binary_op_p (operator_code)) */
9350 error ("%qD must take exactly one argument", decl);
9352 error ("%qD must take exactly two arguments", decl);
9355 /* More Effective C++ rule 7. */
9357 && (operator_code == TRUTH_ANDIF_EXPR
9358 || operator_code == TRUTH_ORIF_EXPR
9359 || operator_code == COMPOUND_EXPR))
9360 warning (OPT_Weffc__, "user-defined %qD always evaluates both arguments",
9364 /* Effective C++ rule 23. */
9367 && !DECL_ASSIGNMENT_OPERATOR_P (decl)
9368 && (operator_code == PLUS_EXPR
9369 || operator_code == MINUS_EXPR
9370 || operator_code == TRUNC_DIV_EXPR
9371 || operator_code == MULT_EXPR
9372 || operator_code == TRUNC_MOD_EXPR)
9373 && TREE_CODE (TREE_TYPE (TREE_TYPE (decl))) == REFERENCE_TYPE)
9374 warning (OPT_Weffc__, "%qD should return by value", decl);
9377 for (; argtypes && argtypes != void_list_node;
9378 argtypes = TREE_CHAIN (argtypes))
9379 if (TREE_PURPOSE (argtypes))
9381 TREE_PURPOSE (argtypes) = NULL_TREE;
9382 if (operator_code == POSTINCREMENT_EXPR
9383 || operator_code == POSTDECREMENT_EXPR)
9386 pedwarn ("%qD cannot have default arguments", decl);
9389 error ("%qD cannot have default arguments", decl);
9396 /* Return a string giving the keyword associate with CODE. */
9399 tag_name (enum tag_types code)
9418 /* Name lookup in an elaborated-type-specifier (after the keyword
9419 indicated by TAG_CODE) has found the TYPE_DECL DECL. If the
9420 elaborated-type-specifier is invalid, issue a diagnostic and return
9421 error_mark_node; otherwise, return the *_TYPE to which it referred.
9422 If ALLOW_TEMPLATE_P is true, TYPE may be a class template. */
9425 check_elaborated_type_specifier (enum tag_types tag_code,
9427 bool allow_template_p)
9433 struct S { struct S *p; };
9435 name lookup will find the TYPE_DECL for the implicit "S::S"
9436 typedef. Adjust for that here. */
9437 if (DECL_SELF_REFERENCE_P (decl))
9438 decl = TYPE_NAME (TREE_TYPE (decl));
9440 type = TREE_TYPE (decl);
9442 /* Check TEMPLATE_TYPE_PARM first because DECL_IMPLICIT_TYPEDEF_P
9443 is false for this case as well. */
9444 if (TREE_CODE (type) == TEMPLATE_TYPE_PARM)
9446 error ("using template type parameter %qT after %qs",
9447 type, tag_name (tag_code));
9448 return error_mark_node;
9452 If the identifier resolves to a typedef-name or a template
9453 type-parameter, the elaborated-type-specifier is ill-formed.
9455 In other words, the only legitimate declaration to use in the
9456 elaborated type specifier is the implicit typedef created when
9457 the type is declared. */
9458 else if (!DECL_IMPLICIT_TYPEDEF_P (decl)
9459 && tag_code != typename_type)
9461 error ("using typedef-name %qD after %qs", decl, tag_name (tag_code));
9462 error ("%q+D has a previous declaration here", decl);
9463 return error_mark_node;
9465 else if (TREE_CODE (type) != RECORD_TYPE
9466 && TREE_CODE (type) != UNION_TYPE
9467 && tag_code != enum_type
9468 && tag_code != typename_type)
9470 error ("%qT referred to as %qs", type, tag_name (tag_code));
9471 error ("%q+T has a previous declaration here", type);
9472 return error_mark_node;
9474 else if (TREE_CODE (type) != ENUMERAL_TYPE
9475 && tag_code == enum_type)
9477 error ("%qT referred to as enum", type);
9478 error ("%q+T has a previous declaration here", type);
9479 return error_mark_node;
9481 else if (!allow_template_p
9482 && TREE_CODE (type) == RECORD_TYPE
9483 && CLASSTYPE_IS_TEMPLATE (type))
9485 /* If a class template appears as elaborated type specifier
9486 without a template header such as:
9488 template <class T> class C {};
9489 void f(class C); // No template header here
9491 then the required template argument is missing. */
9492 error ("template argument required for %<%s %T%>",
9493 tag_name (tag_code),
9494 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type)));
9495 return error_mark_node;
9501 /* Lookup NAME in elaborate type specifier in scope according to
9502 SCOPE and issue diagnostics if necessary.
9503 Return *_TYPE node upon success, NULL_TREE when the NAME is not
9504 found, and ERROR_MARK_NODE for type error. */
9507 lookup_and_check_tag (enum tag_types tag_code, tree name,
9508 tag_scope scope, bool template_header_p)
9512 if (scope == ts_global)
9514 /* First try ordinary name lookup, ignoring hidden class name
9515 injected via friend declaration. */
9516 decl = lookup_name_prefer_type (name, 2);
9517 /* If that fails, the name will be placed in the smallest
9518 non-class, non-function-prototype scope according to 3.3.1/5.
9519 We may already have a hidden name declared as friend in this
9520 scope. So lookup again but not ignoring hidden names.
9521 If we find one, that name will be made visible rather than
9522 creating a new tag. */
9524 decl = lookup_type_scope (name, ts_within_enclosing_non_class);
9527 decl = lookup_type_scope (name, scope);
9529 if (decl && DECL_CLASS_TEMPLATE_P (decl))
9530 decl = DECL_TEMPLATE_RESULT (decl);
9532 if (decl && TREE_CODE (decl) == TYPE_DECL)
9534 /* Look for invalid nested type:
9538 if (scope == ts_current && DECL_SELF_REFERENCE_P (decl))
9540 error ("%qD has the same name as the class in which it is "
9543 return error_mark_node;
9546 /* Two cases we need to consider when deciding if a class
9547 template is allowed as an elaborated type specifier:
9548 1. It is a self reference to its own class.
9549 2. It comes with a template header.
9553 template <class T> class C {
9554 class C *c1; // DECL_SELF_REFERENCE_P is true
9557 template <class U> class C; // template_header_p is true
9558 template <class T> class C<T>::D {
9559 class C *c2; // DECL_SELF_REFERENCE_P is true
9562 t = check_elaborated_type_specifier (tag_code,
9565 | DECL_SELF_REFERENCE_P (decl));
9572 /* Get the struct, enum or union (TAG_CODE says which) with tag NAME.
9573 Define the tag as a forward-reference if it is not defined.
9575 If a declaration is given, process it here, and report an error if
9576 multiple declarations are not identical.
9578 SCOPE is TS_CURRENT when this is also a definition. Only look in
9579 the current frame for the name (since C++ allows new names in any
9580 scope.) It is TS_WITHIN_ENCLOSING_NON_CLASS if this is a friend
9581 declaration. Only look beginning from the current scope outward up
9582 till the nearest non-class scope. Otherwise it is TS_GLOBAL.
9584 TEMPLATE_HEADER_P is true when this declaration is preceded by
9585 a set of template parameters. */
9588 xref_tag (enum tag_types tag_code, tree name,
9589 tag_scope scope, bool template_header_p)
9591 enum tree_code code;
9593 tree context = NULL_TREE;
9595 timevar_push (TV_NAME_LOOKUP);
9597 gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE);
9609 code = ENUMERAL_TYPE;
9615 /* In case of anonymous name, xref_tag is only called to
9616 make type node and push name. Name lookup is not required. */
9617 if (ANON_AGGRNAME_P (name))
9620 t = lookup_and_check_tag (tag_code, name,
9621 scope, template_header_p);
9623 if (t == error_mark_node)
9624 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
9626 if (scope != ts_current && t && current_class_type
9627 && template_class_depth (current_class_type)
9628 && template_header_p)
9630 /* Since SCOPE is not TS_CURRENT, we are not looking at a
9631 definition of this tag. Since, in addition, we are currently
9632 processing a (member) template declaration of a template
9633 class, we must be very careful; consider:
9640 { template <class V>
9641 friend struct S1; };
9643 Here, the S2::S1 declaration should not be confused with the
9644 outer declaration. In particular, the inner version should
9645 have a template parameter of level 2, not level 1. This
9646 would be particularly important if the member declaration
9649 template <class V = U> friend struct S1;
9651 say, when we should tsubst into `U' when instantiating
9652 S2. On the other hand, when presented with:
9662 we must find the inner binding eventually. We
9663 accomplish this by making sure that the new type we
9664 create to represent this declaration has the right
9666 context = TYPE_CONTEXT (t);
9672 /* If no such tag is yet defined, create a forward-reference node
9673 and record it as the "definition".
9674 When a real declaration of this type is found,
9675 the forward-reference will be altered into a real type. */
9676 if (code == ENUMERAL_TYPE)
9678 error ("use of enum %q#D without previous declaration", name);
9679 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
9683 t = make_aggr_type (code);
9684 TYPE_CONTEXT (t) = context;
9685 t = pushtag (name, t, scope);
9690 if (template_header_p && IS_AGGR_TYPE (t))
9691 redeclare_class_template (t, current_template_parms);
9692 else if (!processing_template_decl
9694 && CLASSTYPE_IS_TEMPLATE (t))
9696 error ("redeclaration of %qT as a non-template", t);
9697 error ("previous declaration %q+D", t);
9698 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
9701 /* Make injected friend class visible. */
9702 if (scope != ts_within_enclosing_non_class
9703 && hidden_name_p (TYPE_NAME (t)))
9705 DECL_ANTICIPATED (TYPE_NAME (t)) = 0;
9706 DECL_FRIEND_P (TYPE_NAME (t)) = 0;
9708 if (TYPE_TEMPLATE_INFO (t))
9710 DECL_ANTICIPATED (TYPE_TI_TEMPLATE (t)) = 0;
9711 DECL_FRIEND_P (TYPE_TI_TEMPLATE (t)) = 0;
9716 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, t);
9720 xref_tag_from_type (tree old, tree id, tag_scope scope)
9722 enum tag_types tag_kind;
9724 if (TREE_CODE (old) == RECORD_TYPE)
9725 tag_kind = (CLASSTYPE_DECLARED_CLASS (old) ? class_type : record_type);
9727 tag_kind = union_type;
9729 if (id == NULL_TREE)
9730 id = TYPE_IDENTIFIER (old);
9732 return xref_tag (tag_kind, id, scope, false);
9735 /* Create the binfo hierarchy for REF with (possibly NULL) base list
9736 BASE_LIST. For each element on BASE_LIST the TREE_PURPOSE is an
9737 access_* node, and the TREE_VALUE is the type of the base-class.
9738 Non-NULL TREE_TYPE indicates virtual inheritance. */
9741 xref_basetypes (tree ref, tree base_list)
9744 tree binfo, base_binfo;
9745 unsigned max_vbases = 0; /* Maximum direct & indirect virtual bases. */
9746 unsigned max_bases = 0; /* Maximum direct bases. */
9748 tree default_access;
9749 tree igo_prev; /* Track Inheritance Graph Order. */
9751 if (ref == error_mark_node)
9754 /* The base of a derived class is private by default, all others are
9756 default_access = (TREE_CODE (ref) == RECORD_TYPE
9757 && CLASSTYPE_DECLARED_CLASS (ref)
9758 ? access_private_node : access_public_node);
9760 /* First, make sure that any templates in base-classes are
9761 instantiated. This ensures that if we call ourselves recursively
9762 we do not get confused about which classes are marked and which
9767 tree basetype = TREE_VALUE (*basep);
9769 if (!(processing_template_decl && uses_template_parms (basetype))
9770 && !complete_type_or_else (basetype, NULL))
9771 /* An incomplete type. Remove it from the list. */
9772 *basep = TREE_CHAIN (*basep);
9776 if (TREE_TYPE (*basep))
9778 if (CLASS_TYPE_P (basetype))
9779 max_vbases += VEC_length (tree, CLASSTYPE_VBASECLASSES (basetype));
9780 basep = &TREE_CHAIN (*basep);
9784 TYPE_MARKED_P (ref) = 1;
9786 /* The binfo slot should be empty, unless this is an (ill-formed)
9788 gcc_assert (!TYPE_BINFO (ref) || TYPE_SIZE (ref));
9789 gcc_assert (TYPE_MAIN_VARIANT (ref) == ref);
9791 binfo = make_tree_binfo (max_bases);
9793 TYPE_BINFO (ref) = binfo;
9794 BINFO_OFFSET (binfo) = size_zero_node;
9795 BINFO_TYPE (binfo) = ref;
9799 BINFO_BASE_ACCESSES (binfo) = VEC_alloc (tree, gc, max_bases);
9800 /* An aggregate cannot have baseclasses. */
9801 CLASSTYPE_NON_AGGREGATE (ref) = 1;
9803 if (TREE_CODE (ref) == UNION_TYPE)
9804 error ("derived union %qT invalid", ref);
9809 if (TYPE_FOR_JAVA (ref))
9810 error ("Java class %qT cannot have multiple bases", ref);
9815 CLASSTYPE_VBASECLASSES (ref) = VEC_alloc (tree, gc, max_vbases);
9817 if (TYPE_FOR_JAVA (ref))
9818 error ("Java class %qT cannot have virtual bases", ref);
9821 for (igo_prev = binfo; base_list; base_list = TREE_CHAIN (base_list))
9823 tree access = TREE_PURPOSE (base_list);
9824 int via_virtual = TREE_TYPE (base_list) != NULL_TREE;
9825 tree basetype = TREE_VALUE (base_list);
9827 if (access == access_default_node)
9828 access = default_access;
9830 if (TREE_CODE (basetype) == TYPE_DECL)
9831 basetype = TREE_TYPE (basetype);
9832 if (TREE_CODE (basetype) != RECORD_TYPE
9833 && TREE_CODE (basetype) != TYPENAME_TYPE
9834 && TREE_CODE (basetype) != TEMPLATE_TYPE_PARM
9835 && TREE_CODE (basetype) != BOUND_TEMPLATE_TEMPLATE_PARM)
9837 error ("base type %qT fails to be a struct or class type",
9842 if (TYPE_FOR_JAVA (basetype) && (current_lang_depth () == 0))
9843 TYPE_FOR_JAVA (ref) = 1;
9845 base_binfo = NULL_TREE;
9846 if (CLASS_TYPE_P (basetype) && !dependent_type_p (basetype))
9848 base_binfo = TYPE_BINFO (basetype);
9849 /* The original basetype could have been a typedef'd type. */
9850 basetype = BINFO_TYPE (base_binfo);
9852 /* Inherit flags from the base. */
9853 TYPE_HAS_NEW_OPERATOR (ref)
9854 |= TYPE_HAS_NEW_OPERATOR (basetype);
9855 TYPE_HAS_ARRAY_NEW_OPERATOR (ref)
9856 |= TYPE_HAS_ARRAY_NEW_OPERATOR (basetype);
9857 TYPE_GETS_DELETE (ref) |= TYPE_GETS_DELETE (basetype);
9858 TYPE_HAS_CONVERSION (ref) |= TYPE_HAS_CONVERSION (basetype);
9859 CLASSTYPE_DIAMOND_SHAPED_P (ref)
9860 |= CLASSTYPE_DIAMOND_SHAPED_P (basetype);
9861 CLASSTYPE_REPEATED_BASE_P (ref)
9862 |= CLASSTYPE_REPEATED_BASE_P (basetype);
9865 /* We must do this test after we've seen through a typedef
9867 if (TYPE_MARKED_P (basetype))
9869 if (basetype == ref)
9870 error ("recursive type %qT undefined", basetype);
9872 error ("duplicate base type %qT invalid", basetype);
9875 TYPE_MARKED_P (basetype) = 1;
9877 base_binfo = copy_binfo (base_binfo, basetype, ref,
9878 &igo_prev, via_virtual);
9879 if (!BINFO_INHERITANCE_CHAIN (base_binfo))
9880 BINFO_INHERITANCE_CHAIN (base_binfo) = binfo;
9882 BINFO_BASE_APPEND (binfo, base_binfo);
9883 BINFO_BASE_ACCESS_APPEND (binfo, access);
9886 if (VEC_space (tree, CLASSTYPE_VBASECLASSES (ref), 1))
9887 /* If we have space in the vbase vector, we must have shared at
9888 least one of them, and are therefore diamond shaped. */
9889 CLASSTYPE_DIAMOND_SHAPED_P (ref) = 1;
9891 /* Unmark all the types. */
9892 for (i = 0; BINFO_BASE_ITERATE (binfo, i, base_binfo); i++)
9893 TYPE_MARKED_P (BINFO_TYPE (base_binfo)) = 0;
9894 TYPE_MARKED_P (ref) = 0;
9896 /* Now see if we have a repeated base type. */
9897 if (!CLASSTYPE_REPEATED_BASE_P (ref))
9899 for (base_binfo = binfo; base_binfo;
9900 base_binfo = TREE_CHAIN (base_binfo))
9902 if (TYPE_MARKED_P (BINFO_TYPE (base_binfo)))
9904 CLASSTYPE_REPEATED_BASE_P (ref) = 1;
9907 TYPE_MARKED_P (BINFO_TYPE (base_binfo)) = 1;
9909 for (base_binfo = binfo; base_binfo;
9910 base_binfo = TREE_CHAIN (base_binfo))
9911 if (TYPE_MARKED_P (BINFO_TYPE (base_binfo)))
9912 TYPE_MARKED_P (BINFO_TYPE (base_binfo)) = 0;
9919 /* Begin compiling the definition of an enumeration type.
9921 Returns the type object, as yet incomplete.
9922 Also records info about it so that build_enumerator
9923 may be used to declare the individual values as they are read. */
9926 start_enum (tree name)
9930 gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE);
9932 /* If this is the real definition for a previous forward reference,
9933 fill in the contents in the same object that used to be the
9934 forward reference. */
9936 enumtype = lookup_and_check_tag (enum_type, name,
9937 /*tag_scope=*/ts_current,
9938 /*template_header_p=*/false);
9940 if (enumtype != NULL_TREE && TREE_CODE (enumtype) == ENUMERAL_TYPE)
9942 error ("multiple definition of %q#T", enumtype);
9943 error ("%Jprevious definition here", TYPE_MAIN_DECL (enumtype));
9944 /* Clear out TYPE_VALUES, and start again. */
9945 TYPE_VALUES (enumtype) = NULL_TREE;
9949 /* In case of error, make a dummy enum to allow parsing to
9951 if (enumtype == error_mark_node)
9952 name = make_anon_name ();
9954 enumtype = make_node (ENUMERAL_TYPE);
9955 enumtype = pushtag (name, enumtype, /*tag_scope=*/ts_current);
9961 /* After processing and defining all the values of an enumeration type,
9962 install their decls in the enumeration type and finish it off.
9963 ENUMTYPE is the type object and VALUES a list of name-value pairs. */
9966 finish_enum (tree enumtype)
9975 bool use_short_enum;
9979 integer_type_kind itk;
9980 tree underlying_type = NULL_TREE;
9982 /* We built up the VALUES in reverse order. */
9983 TYPE_VALUES (enumtype) = nreverse (TYPE_VALUES (enumtype));
9985 /* For an enum defined in a template, just set the type of the values;
9986 all further processing is postponed until the template is
9987 instantiated. We need to set the type so that tsubst of a CONST_DECL
9989 if (processing_template_decl)
9991 for (values = TYPE_VALUES (enumtype);
9993 values = TREE_CHAIN (values))
9994 TREE_TYPE (TREE_VALUE (values)) = enumtype;
9995 if (at_function_scope_p ())
9996 add_stmt (build_min (TAG_DEFN, enumtype));
10000 /* Determine the minimum and maximum values of the enumerators. */
10001 if (TYPE_VALUES (enumtype))
10003 minnode = maxnode = NULL_TREE;
10005 for (values = TYPE_VALUES (enumtype);
10007 values = TREE_CHAIN (values))
10009 decl = TREE_VALUE (values);
10011 /* [dcl.enum]: Following the closing brace of an enum-specifier,
10012 each enumerator has the type of its enumeration. Prior to the
10013 closing brace, the type of each enumerator is the type of its
10014 initializing value. */
10015 TREE_TYPE (decl) = enumtype;
10017 /* Update the minimum and maximum values, if appropriate. */
10018 value = DECL_INITIAL (decl);
10019 if (value == error_mark_node)
10020 value = integer_zero_node;
10021 /* Figure out what the minimum and maximum values of the
10022 enumerators are. */
10024 minnode = maxnode = value;
10025 else if (tree_int_cst_lt (maxnode, value))
10027 else if (tree_int_cst_lt (value, minnode))
10034 If the enumerator-list is empty, the underlying type is as if
10035 the enumeration had a single enumerator with value 0. */
10036 minnode = maxnode = integer_zero_node;
10038 /* Compute the number of bits require to represent all values of the
10039 enumeration. We must do this before the type of MINNODE and
10040 MAXNODE are transformed, since min_precision relies on the
10041 TREE_TYPE of the value it is passed. */
10042 unsignedp = tree_int_cst_sgn (minnode) >= 0;
10043 lowprec = min_precision (minnode, unsignedp);
10044 highprec = min_precision (maxnode, unsignedp);
10045 precision = MAX (lowprec, highprec);
10047 /* Determine the underlying type of the enumeration.
10051 The underlying type of an enumeration is an integral type that
10052 can represent all the enumerator values defined in the
10053 enumeration. It is implementation-defined which integral type is
10054 used as the underlying type for an enumeration except that the
10055 underlying type shall not be larger than int unless the value of
10056 an enumerator cannot fit in an int or unsigned int.
10058 We use "int" or an "unsigned int" as the underlying type, even if
10059 a smaller integral type would work, unless the user has
10060 explicitly requested that we use the smallest possible type. The
10061 user can request that for all enumerations with a command line
10062 flag, or for just one enumeration with an attribute. */
10064 use_short_enum = flag_short_enums
10065 || lookup_attribute ("packed", TYPE_ATTRIBUTES (enumtype));
10067 for (itk = (use_short_enum ? itk_char : itk_int);
10071 underlying_type = integer_types[itk];
10072 if (TYPE_PRECISION (underlying_type) >= precision
10073 && TYPE_UNSIGNED (underlying_type) == unsignedp)
10076 if (itk == itk_none)
10080 IF no integral type can represent all the enumerator values, the
10081 enumeration is ill-formed. */
10082 error ("no integral type can represent all of the enumerator values "
10083 "for %qT", enumtype);
10084 precision = TYPE_PRECISION (long_long_integer_type_node);
10085 underlying_type = integer_types[itk_unsigned_long_long];
10088 /* Compute the minium and maximum values for the type.
10092 For an enumeration where emin is the smallest enumerator and emax
10093 is the largest, the values of the enumeration are the values of the
10094 underlying type in the range bmin to bmax, where bmin and bmax are,
10095 respectively, the smallest and largest values of the smallest bit-
10096 field that can store emin and emax. */
10098 /* The middle-end currently assumes that types with TYPE_PRECISION
10099 narrower than their underlying type are suitably zero or sign
10100 extended to fill their mode. g++ doesn't make these guarantees.
10101 Until the middle-end can represent such paradoxical types, we
10102 set the TYPE_PRECISION to the width of the underlying type. */
10103 TYPE_PRECISION (enumtype) = TYPE_PRECISION (underlying_type);
10105 set_min_and_max_values_for_integral_type (enumtype, precision, unsignedp);
10109 The value of sizeof() applied to an enumeration type, an object
10110 of an enumeration type, or an enumerator, is the value of sizeof()
10111 applied to the underlying type. */
10112 TYPE_SIZE (enumtype) = TYPE_SIZE (underlying_type);
10113 TYPE_SIZE_UNIT (enumtype) = TYPE_SIZE_UNIT (underlying_type);
10114 TYPE_MODE (enumtype) = TYPE_MODE (underlying_type);
10115 TYPE_ALIGN (enumtype) = TYPE_ALIGN (underlying_type);
10116 TYPE_USER_ALIGN (enumtype) = TYPE_USER_ALIGN (underlying_type);
10117 TYPE_UNSIGNED (enumtype) = TYPE_UNSIGNED (underlying_type);
10119 /* Convert each of the enumerators to the type of the underlying
10120 type of the enumeration. */
10121 for (values = TYPE_VALUES (enumtype); values; values = TREE_CHAIN (values))
10123 location_t saved_location;
10125 decl = TREE_VALUE (values);
10126 saved_location = input_location;
10127 input_location = DECL_SOURCE_LOCATION (decl);
10128 value = perform_implicit_conversion (underlying_type,
10129 DECL_INITIAL (decl));
10130 input_location = saved_location;
10132 /* Do not clobber shared ints. */
10133 value = copy_node (value);
10135 TREE_TYPE (value) = enumtype;
10136 DECL_INITIAL (decl) = value;
10137 TREE_VALUE (values) = value;
10140 /* Fix up all variant types of this enum type. */
10141 for (t = TYPE_MAIN_VARIANT (enumtype); t; t = TYPE_NEXT_VARIANT (t))
10143 TYPE_VALUES (t) = TYPE_VALUES (enumtype);
10144 TYPE_MIN_VALUE (t) = TYPE_MIN_VALUE (enumtype);
10145 TYPE_MAX_VALUE (t) = TYPE_MAX_VALUE (enumtype);
10146 TYPE_SIZE (t) = TYPE_SIZE (enumtype);
10147 TYPE_SIZE_UNIT (t) = TYPE_SIZE_UNIT (enumtype);
10148 TYPE_MODE (t) = TYPE_MODE (enumtype);
10149 TYPE_PRECISION (t) = TYPE_PRECISION (enumtype);
10150 TYPE_ALIGN (t) = TYPE_ALIGN (enumtype);
10151 TYPE_USER_ALIGN (t) = TYPE_USER_ALIGN (enumtype);
10152 TYPE_UNSIGNED (t) = TYPE_UNSIGNED (enumtype);
10155 /* Finish debugging output for this type. */
10156 rest_of_type_compilation (enumtype, namespace_bindings_p ());
10159 /* Build and install a CONST_DECL for an enumeration constant of the
10160 enumeration type ENUMTYPE whose NAME and VALUE (if any) are provided.
10161 Assignment of sequential values by default is handled here. */
10164 build_enumerator (tree name, tree value, tree enumtype)
10170 /* If the VALUE was erroneous, pretend it wasn't there; that will
10171 result in the enum being assigned the next value in sequence. */
10172 if (value == error_mark_node)
10175 /* Remove no-op casts from the value. */
10177 STRIP_TYPE_NOPS (value);
10179 if (! processing_template_decl)
10181 /* Validate and default VALUE. */
10182 if (value != NULL_TREE)
10184 value = integral_constant_value (value);
10186 if (TREE_CODE (value) == INTEGER_CST)
10188 value = perform_integral_promotions (value);
10189 constant_expression_warning (value);
10193 error ("enumerator value for %qD not integer constant", name);
10198 /* Default based on previous value. */
10199 if (value == NULL_TREE)
10201 if (TYPE_VALUES (enumtype))
10204 unsigned HOST_WIDE_INT lo;
10208 /* The next value is the previous value plus one. We can
10209 safely assume that the previous value is an INTEGER_CST.
10210 add_double doesn't know the type of the target expression,
10211 so we must check with int_fits_type_p as well. */
10212 prev_value = DECL_INITIAL (TREE_VALUE (TYPE_VALUES (enumtype)));
10213 overflowed = add_double (TREE_INT_CST_LOW (prev_value),
10214 TREE_INT_CST_HIGH (prev_value),
10216 value = build_int_cst_wide (TREE_TYPE (prev_value), lo, hi);
10217 overflowed |= !int_fits_type_p (value, TREE_TYPE (prev_value));
10221 error ("overflow in enumeration values at %qD", name);
10222 value = error_mark_node;
10226 value = integer_zero_node;
10229 /* Remove no-op casts from the value. */
10230 STRIP_TYPE_NOPS (value);
10233 /* C++ associates enums with global, function, or class declarations. */
10234 context = current_scope ();
10236 /* Build the actual enumeration constant. Note that the enumeration
10237 constants have the type of their initializers until the
10238 enumeration is complete:
10242 Following the closing brace of an enum-specifier, each enumer-
10243 ator has the type of its enumeration. Prior to the closing
10244 brace, the type of each enumerator is the type of its
10245 initializing value.
10247 In finish_enum we will reset the type. Of course, if we're
10248 processing a template, there may be no value. */
10249 type = value ? TREE_TYPE (value) : NULL_TREE;
10251 if (context && context == current_class_type)
10252 /* This enum declaration is local to the class. We need the full
10253 lang_decl so that we can record DECL_CLASS_CONTEXT, for example. */
10254 decl = build_lang_decl (CONST_DECL, name, type);
10256 /* It's a global enum, or it's local to a function. (Note local to
10257 a function could mean local to a class method. */
10258 decl = build_decl (CONST_DECL, name, type);
10260 DECL_CONTEXT (decl) = FROB_CONTEXT (context);
10261 TREE_CONSTANT (decl) = 1;
10262 TREE_INVARIANT (decl) = 1;
10263 TREE_READONLY (decl) = 1;
10264 DECL_INITIAL (decl) = value;
10266 if (context && context == current_class_type)
10267 /* In something like `struct S { enum E { i = 7 }; };' we put `i'
10268 on the TYPE_FIELDS list for `S'. (That's so that you can say
10269 things like `S::i' later.) */
10270 finish_member_declaration (decl);
10274 /* Add this enumeration constant to the list for this type. */
10275 TYPE_VALUES (enumtype) = tree_cons (name, decl, TYPE_VALUES (enumtype));
10279 /* We're defining DECL. Make sure that it's type is OK. */
10282 check_function_type (tree decl, tree current_function_parms)
10284 tree fntype = TREE_TYPE (decl);
10285 tree return_type = complete_type (TREE_TYPE (fntype));
10287 /* In a function definition, arg types must be complete. */
10288 require_complete_types_for_parms (current_function_parms);
10290 if (dependent_type_p (return_type))
10292 if (!COMPLETE_OR_VOID_TYPE_P (return_type))
10294 tree args = TYPE_ARG_TYPES (fntype);
10296 error ("return type %q#T is incomplete", return_type);
10298 /* Make it return void instead. */
10299 if (TREE_CODE (fntype) == METHOD_TYPE)
10300 fntype = build_method_type_directly (TREE_TYPE (TREE_VALUE (args)),
10302 TREE_CHAIN (args));
10304 fntype = build_function_type (void_type_node, args);
10306 = build_exception_variant (fntype,
10307 TYPE_RAISES_EXCEPTIONS (TREE_TYPE (decl)));
10310 abstract_virtuals_error (decl, TREE_TYPE (fntype));
10313 /* Create the FUNCTION_DECL for a function definition.
10314 DECLSPECS and DECLARATOR are the parts of the declaration;
10315 they describe the function's name and the type it returns,
10316 but twisted together in a fashion that parallels the syntax of C.
10318 FLAGS is a bitwise or of SF_PRE_PARSED (indicating that the
10319 DECLARATOR is really the DECL for the function we are about to
10320 process and that DECLSPECS should be ignored), SF_INCLASS_INLINE
10321 indicating that the function is an inline defined in-class.
10323 This function creates a binding context for the function body
10324 as well as setting up the FUNCTION_DECL in current_function_decl.
10326 For C++, we must first check whether that datum makes any sense.
10327 For example, "class A local_a(1,2);" means that variable local_a
10328 is an aggregate of type A, which should have a constructor
10329 applied to it with the argument list [1, 2]. */
10332 start_preparsed_function (tree decl1, tree attrs, int flags)
10334 tree ctype = NULL_TREE;
10337 int doing_friend = 0;
10338 struct cp_binding_level *bl;
10339 tree current_function_parms;
10340 struct c_fileinfo *finfo
10341 = get_fileinfo (lbasename (LOCATION_FILE (DECL_SOURCE_LOCATION (decl1))));
10342 bool honor_interface;
10344 /* Sanity check. */
10345 gcc_assert (TREE_CODE (TREE_VALUE (void_list_node)) == VOID_TYPE);
10346 gcc_assert (TREE_CHAIN (void_list_node) == NULL_TREE);
10348 fntype = TREE_TYPE (decl1);
10349 if (TREE_CODE (fntype) == METHOD_TYPE)
10350 ctype = TYPE_METHOD_BASETYPE (fntype);
10352 /* ISO C++ 11.4/5. A friend function defined in a class is in
10353 the (lexical) scope of the class in which it is defined. */
10354 if (!ctype && DECL_FRIEND_P (decl1))
10356 ctype = DECL_FRIEND_CONTEXT (decl1);
10358 /* CTYPE could be null here if we're dealing with a template;
10359 for example, `inline friend float foo()' inside a template
10360 will have no CTYPE set. */
10361 if (ctype && TREE_CODE (ctype) != RECORD_TYPE)
10367 if (DECL_DECLARED_INLINE_P (decl1)
10368 && lookup_attribute ("noinline", attrs))
10369 warning (0, "inline function %q+D given attribute noinline", decl1);
10371 if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (decl1))
10372 /* This is a constructor, we must ensure that any default args
10373 introduced by this definition are propagated to the clones
10374 now. The clones are used directly in overload resolution. */
10375 adjust_clone_args (decl1);
10377 /* Sometimes we don't notice that a function is a static member, and
10378 build a METHOD_TYPE for it. Fix that up now. */
10379 if (ctype != NULL_TREE && DECL_STATIC_FUNCTION_P (decl1)
10380 && TREE_CODE (TREE_TYPE (decl1)) == METHOD_TYPE)
10382 revert_static_member_fn (decl1);
10386 /* Set up current_class_type, and enter the scope of the class, if
10389 push_nested_class (ctype);
10390 else if (DECL_STATIC_FUNCTION_P (decl1))
10391 push_nested_class (DECL_CONTEXT (decl1));
10393 /* Now that we have entered the scope of the class, we must restore
10394 the bindings for any template parameters surrounding DECL1, if it
10395 is an inline member template. (Order is important; consider the
10396 case where a template parameter has the same name as a field of
10397 the class.) It is not until after this point that
10398 PROCESSING_TEMPLATE_DECL is guaranteed to be set up correctly. */
10399 if (flags & SF_INCLASS_INLINE)
10400 maybe_begin_member_template_processing (decl1);
10402 /* Effective C++ rule 15. */
10404 && DECL_OVERLOADED_OPERATOR_P (decl1) == NOP_EXPR
10405 && TREE_CODE (TREE_TYPE (fntype)) == VOID_TYPE)
10406 warning (OPT_Weffc__, "%<operator=%> should return a reference to %<*this%>");
10408 /* Make the init_value nonzero so pushdecl knows this is not tentative.
10409 error_mark_node is replaced below (in poplevel) with the BLOCK. */
10410 if (!DECL_INITIAL (decl1))
10411 DECL_INITIAL (decl1) = error_mark_node;
10413 /* This function exists in static storage.
10414 (This does not mean `static' in the C sense!) */
10415 TREE_STATIC (decl1) = 1;
10417 /* We must call push_template_decl after current_class_type is set
10418 up. (If we are processing inline definitions after exiting a
10419 class scope, current_class_type will be NULL_TREE until set above
10420 by push_nested_class.) */
10421 if (processing_template_decl)
10423 /* FIXME: Handle error_mark_node more gracefully. */
10424 tree newdecl1 = push_template_decl (decl1);
10425 if (newdecl1 != error_mark_node)
10429 /* We are now in the scope of the function being defined. */
10430 current_function_decl = decl1;
10432 /* Save the parm names or decls from this function's declarator
10433 where store_parm_decls will find them. */
10434 current_function_parms = DECL_ARGUMENTS (decl1);
10436 /* Make sure the parameter and return types are reasonable. When
10437 you declare a function, these types can be incomplete, but they
10438 must be complete when you define the function. */
10439 check_function_type (decl1, current_function_parms);
10441 /* Build the return declaration for the function. */
10442 restype = TREE_TYPE (fntype);
10443 /* Promote the value to int before returning it. */
10444 if (c_promoting_integer_type_p (restype))
10445 restype = type_promotes_to (restype);
10446 if (DECL_RESULT (decl1) == NULL_TREE)
10450 resdecl = build_decl (RESULT_DECL, 0, TYPE_MAIN_VARIANT (restype));
10451 DECL_ARTIFICIAL (resdecl) = 1;
10452 DECL_IGNORED_P (resdecl) = 1;
10453 DECL_RESULT (decl1) = resdecl;
10455 cp_apply_type_quals_to_decl (cp_type_quals (restype), resdecl);
10458 /* Initialize RTL machinery. We cannot do this until
10459 CURRENT_FUNCTION_DECL and DECL_RESULT are set up. We do this
10460 even when processing a template; this is how we get
10461 CFUN set up, and our per-function variables initialized.
10462 FIXME factor out the non-RTL stuff. */
10463 bl = current_binding_level;
10464 allocate_struct_function (decl1);
10465 current_binding_level = bl;
10467 /* Even though we're inside a function body, we still don't want to
10468 call expand_expr to calculate the size of a variable-sized array.
10469 We haven't necessarily assigned RTL to all variables yet, so it's
10470 not safe to try to expand expressions involving them. */
10471 cfun->x_dont_save_pending_sizes_p = 1;
10473 /* Start the statement-tree, start the tree now. */
10474 DECL_SAVED_TREE (decl1) = push_stmt_list ();
10476 /* Let the user know we're compiling this function. */
10477 announce_function (decl1);
10479 /* Record the decl so that the function name is defined.
10480 If we already have a decl for this name, and it is a FUNCTION_DECL,
10481 use the old decl. */
10482 if (!processing_template_decl && !(flags & SF_PRE_PARSED))
10484 /* A specialization is not used to guide overload resolution. */
10485 if (!DECL_FUNCTION_MEMBER_P (decl1)
10486 && !(DECL_USE_TEMPLATE (decl1) &&
10487 PRIMARY_TEMPLATE_P (DECL_TI_TEMPLATE (decl1))))
10489 tree olddecl = pushdecl (decl1);
10491 if (olddecl == error_mark_node)
10492 /* If something went wrong when registering the declaration,
10493 use DECL1; we have to have a FUNCTION_DECL to use when
10494 parsing the body of the function. */
10497 /* Otherwise, OLDDECL is either a previous declaration of
10498 the same function or DECL1 itself. */
10503 /* We need to set the DECL_CONTEXT. */
10504 if (!DECL_CONTEXT (decl1) && DECL_TEMPLATE_INFO (decl1))
10505 DECL_CONTEXT (decl1) = DECL_CONTEXT (DECL_TI_TEMPLATE (decl1));
10507 fntype = TREE_TYPE (decl1);
10509 /* If #pragma weak applies, mark the decl appropriately now.
10510 The pragma only applies to global functions. Because
10511 determining whether or not the #pragma applies involves
10512 computing the mangled name for the declaration, we cannot
10513 apply the pragma until after we have merged this declaration
10514 with any previous declarations; if the original declaration
10515 has a linkage specification, that specification applies to
10516 the definition as well, and may affect the mangled name. */
10517 if (!DECL_CONTEXT (decl1))
10518 maybe_apply_pragma_weak (decl1);
10521 /* Reset these in case the call to pushdecl changed them. */
10522 current_function_decl = decl1;
10523 cfun->decl = decl1;
10525 /* If we are (erroneously) defining a function that we have already
10526 defined before, wipe out what we knew before. */
10527 if (!DECL_PENDING_INLINE_P (decl1))
10528 DECL_SAVED_FUNCTION_DATA (decl1) = NULL;
10530 if (ctype && !doing_friend && !DECL_STATIC_FUNCTION_P (decl1))
10532 /* We know that this was set up by `grokclassfn'. We do not
10533 wait until `store_parm_decls', since evil parse errors may
10534 never get us to that point. Here we keep the consistency
10535 between `current_class_type' and `current_class_ptr'. */
10536 tree t = DECL_ARGUMENTS (decl1);
10538 gcc_assert (t != NULL_TREE && TREE_CODE (t) == PARM_DECL);
10539 gcc_assert (TREE_CODE (TREE_TYPE (t)) == POINTER_TYPE);
10541 cp_function_chain->x_current_class_ref
10542 = build_indirect_ref (t, NULL);
10543 cp_function_chain->x_current_class_ptr = t;
10545 /* Constructors and destructors need to know whether they're "in
10546 charge" of initializing virtual base classes. */
10547 t = TREE_CHAIN (t);
10548 if (DECL_HAS_IN_CHARGE_PARM_P (decl1))
10550 current_in_charge_parm = t;
10551 t = TREE_CHAIN (t);
10553 if (DECL_HAS_VTT_PARM_P (decl1))
10555 gcc_assert (DECL_NAME (t) == vtt_parm_identifier);
10556 current_vtt_parm = t;
10560 honor_interface = (!DECL_TEMPLATE_INSTANTIATION (decl1)
10561 /* Implicitly-defined methods (like the
10562 destructor for a class in which no destructor
10563 is explicitly declared) must not be defined
10564 until their definition is needed. So, we
10565 ignore interface specifications for
10566 compiler-generated functions. */
10567 && !DECL_ARTIFICIAL (decl1));
10569 if (DECL_INTERFACE_KNOWN (decl1))
10571 tree ctx = decl_function_context (decl1);
10573 if (DECL_NOT_REALLY_EXTERN (decl1))
10574 DECL_EXTERNAL (decl1) = 0;
10576 if (ctx != NULL_TREE && DECL_DECLARED_INLINE_P (ctx)
10577 && TREE_PUBLIC (ctx))
10578 /* This is a function in a local class in an extern inline
10580 comdat_linkage (decl1);
10582 /* If this function belongs to an interface, it is public.
10583 If it belongs to someone else's interface, it is also external.
10584 This only affects inlines and template instantiations. */
10585 else if (!finfo->interface_unknown && honor_interface)
10587 if (DECL_DECLARED_INLINE_P (decl1)
10588 || DECL_TEMPLATE_INSTANTIATION (decl1)
10589 || processing_template_decl)
10591 DECL_EXTERNAL (decl1)
10592 = (finfo->interface_only
10593 || (DECL_DECLARED_INLINE_P (decl1)
10594 && ! flag_implement_inlines
10595 && !DECL_VINDEX (decl1)));
10597 /* For WIN32 we also want to put these in linkonce sections. */
10598 maybe_make_one_only (decl1);
10601 DECL_EXTERNAL (decl1) = 0;
10602 DECL_INTERFACE_KNOWN (decl1) = 1;
10603 /* If this function is in an interface implemented in this file,
10604 make sure that the backend knows to emit this function
10606 if (!DECL_EXTERNAL (decl1))
10607 mark_needed (decl1);
10609 else if (finfo->interface_unknown && finfo->interface_only
10610 && honor_interface)
10612 /* If MULTIPLE_SYMBOL_SPACES is defined and we saw a #pragma
10613 interface, we will have both finfo->interface_unknown and
10614 finfo->interface_only set. In that case, we don't want to
10615 use the normal heuristics because someone will supply a
10616 #pragma implementation elsewhere, and deducing it here would
10617 produce a conflict. */
10618 comdat_linkage (decl1);
10619 DECL_EXTERNAL (decl1) = 0;
10620 DECL_INTERFACE_KNOWN (decl1) = 1;
10621 DECL_DEFER_OUTPUT (decl1) = 1;
10625 /* This is a definition, not a reference.
10626 So clear DECL_EXTERNAL. */
10627 DECL_EXTERNAL (decl1) = 0;
10629 if ((DECL_DECLARED_INLINE_P (decl1)
10630 || DECL_TEMPLATE_INSTANTIATION (decl1))
10631 && ! DECL_INTERFACE_KNOWN (decl1)
10632 /* Don't try to defer nested functions for now. */
10633 && ! decl_function_context (decl1))
10634 DECL_DEFER_OUTPUT (decl1) = 1;
10636 DECL_INTERFACE_KNOWN (decl1) = 1;
10639 /* Determine the ELF visibility attribute for the function. We must not
10640 do this before calling "pushdecl", as we must allow "duplicate_decls"
10641 to merge any attributes appropriately. We also need to wait until
10643 if (!DECL_CLONED_FUNCTION_P (decl1))
10644 determine_visibility (decl1);
10646 begin_scope (sk_function_parms, decl1);
10650 if (DECL_DESTRUCTOR_P (decl1)
10651 || (DECL_CONSTRUCTOR_P (decl1)
10652 && targetm.cxx.cdtor_returns_this ()))
10654 cdtor_label = build_decl (LABEL_DECL, NULL_TREE, NULL_TREE);
10655 DECL_CONTEXT (cdtor_label) = current_function_decl;
10658 start_fname_decls ();
10660 store_parm_decls (current_function_parms);
10664 /* Like start_preparsed_function, except that instead of a
10665 FUNCTION_DECL, this function takes DECLSPECS and DECLARATOR.
10667 Returns 1 on success. If the DECLARATOR is not suitable for a function
10668 (it defines a datum instead), we return 0, which tells
10669 yyparse to report a parse error. */
10672 start_function (cp_decl_specifier_seq *declspecs,
10673 const cp_declarator *declarator,
10678 decl1 = grokdeclarator (declarator, declspecs, FUNCDEF, 1, &attrs);
10679 /* If the declarator is not suitable for a function definition,
10680 cause a syntax error. */
10681 if (decl1 == NULL_TREE || TREE_CODE (decl1) != FUNCTION_DECL)
10684 if (DECL_MAIN_P (decl1))
10685 /* main must return int. grokfndecl should have corrected it
10686 (and issued a diagnostic) if the user got it wrong. */
10687 gcc_assert (same_type_p (TREE_TYPE (TREE_TYPE (decl1)),
10688 integer_type_node));
10690 start_preparsed_function (decl1, attrs, /*flags=*/SF_DEFAULT);
10695 /* Returns true iff an EH_SPEC_BLOCK should be created in the body of
10699 use_eh_spec_block (tree fn)
10701 return (flag_exceptions && flag_enforce_eh_specs
10702 && !processing_template_decl
10703 && TYPE_RAISES_EXCEPTIONS (TREE_TYPE (fn))
10704 /* We insert the EH_SPEC_BLOCK only in the original
10705 function; then, it is copied automatically to the
10707 && !DECL_CLONED_FUNCTION_P (fn)
10708 /* Implicitly-generated constructors and destructors have
10709 exception specifications. However, those specifications
10710 are the union of the possible exceptions specified by the
10711 constructors/destructors for bases and members, so no
10712 unallowed exception will ever reach this function. By
10713 not creating the EH_SPEC_BLOCK we save a little memory,
10714 and we avoid spurious warnings about unreachable
10716 && !DECL_ARTIFICIAL (fn));
10719 /* Store the parameter declarations into the current function declaration.
10720 This is called after parsing the parameter declarations, before
10721 digesting the body of the function.
10723 Also install to binding contour return value identifier, if any. */
10726 store_parm_decls (tree current_function_parms)
10728 tree fndecl = current_function_decl;
10731 /* This is a chain of any other decls that came in among the parm
10732 declarations. If a parm is declared with enum {foo, bar} x;
10733 then CONST_DECLs for foo and bar are put here. */
10734 tree nonparms = NULL_TREE;
10736 if (current_function_parms)
10738 /* This case is when the function was defined with an ANSI prototype.
10739 The parms already have decls, so we need not do anything here
10740 except record them as in effect
10741 and complain if any redundant old-style parm decls were written. */
10743 tree specparms = current_function_parms;
10746 /* Must clear this because it might contain TYPE_DECLs declared
10748 current_binding_level->names = NULL;
10750 /* If we're doing semantic analysis, then we'll call pushdecl
10751 for each of these. We must do them in reverse order so that
10752 they end in the correct forward order. */
10753 specparms = nreverse (specparms);
10755 for (parm = specparms; parm; parm = next)
10757 next = TREE_CHAIN (parm);
10758 if (TREE_CODE (parm) == PARM_DECL)
10760 if (DECL_NAME (parm) == NULL_TREE
10761 || TREE_CODE (parm) != VOID_TYPE)
10764 error ("parameter %qD declared void", parm);
10768 /* If we find an enum constant or a type tag,
10769 put it aside for the moment. */
10770 TREE_CHAIN (parm) = NULL_TREE;
10771 nonparms = chainon (nonparms, parm);
10775 /* Get the decls in their original chain order and record in the
10776 function. This is all and only the PARM_DECLs that were
10777 pushed into scope by the loop above. */
10778 DECL_ARGUMENTS (fndecl) = getdecls ();
10781 DECL_ARGUMENTS (fndecl) = NULL_TREE;
10783 /* Now store the final chain of decls for the arguments
10784 as the decl-chain of the current lexical scope.
10785 Put the enumerators in as well, at the front so that
10786 DECL_ARGUMENTS is not modified. */
10787 current_binding_level->names = chainon (nonparms, DECL_ARGUMENTS (fndecl));
10789 if (use_eh_spec_block (current_function_decl))
10790 current_eh_spec_block = begin_eh_spec_block ();
10794 /* We have finished doing semantic analysis on DECL, but have not yet
10795 generated RTL for its body. Save away our current state, so that
10796 when we want to generate RTL later we know what to do. */
10799 save_function_data (tree decl)
10801 struct language_function *f;
10803 /* Save the language-specific per-function data so that we can
10804 get it back when we really expand this function. */
10805 gcc_assert (!DECL_PENDING_INLINE_P (decl));
10808 f = GGC_NEW (struct language_function);
10809 memcpy (f, cp_function_chain, sizeof (struct language_function));
10810 DECL_SAVED_FUNCTION_DATA (decl) = f;
10812 /* Clear out the bits we don't need. */
10813 f->base.x_stmt_tree.x_cur_stmt_list = NULL_TREE;
10814 f->bindings = NULL;
10815 f->x_local_names = NULL;
10819 /* Set the return value of the constructor (if present). */
10822 finish_constructor_body (void)
10827 if (targetm.cxx.cdtor_returns_this ())
10829 /* Any return from a constructor will end up here. */
10830 add_stmt (build_stmt (LABEL_EXPR, cdtor_label));
10832 val = DECL_ARGUMENTS (current_function_decl);
10833 val = build2 (MODIFY_EXPR, TREE_TYPE (val),
10834 DECL_RESULT (current_function_decl), val);
10835 /* Return the address of the object. */
10836 exprstmt = build_stmt (RETURN_EXPR, val);
10837 add_stmt (exprstmt);
10841 /* Do all the processing for the beginning of a destructor; set up the
10842 vtable pointers and cleanups for bases and members. */
10845 begin_destructor_body (void)
10847 tree compound_stmt;
10849 /* If the CURRENT_CLASS_TYPE is incomplete, we will have already
10850 issued an error message. We still want to try to process the
10851 body of the function, but initialize_vtbl_ptrs will crash if
10852 TYPE_BINFO is NULL. */
10853 if (COMPLETE_TYPE_P (current_class_type))
10855 compound_stmt = begin_compound_stmt (0);
10856 /* Make all virtual function table pointers in non-virtual base
10857 classes point to CURRENT_CLASS_TYPE's virtual function
10859 initialize_vtbl_ptrs (current_class_ptr);
10860 finish_compound_stmt (compound_stmt);
10862 /* And insert cleanups for our bases and members so that they
10863 will be properly destroyed if we throw. */
10864 push_base_cleanups ();
10868 /* At the end of every destructor we generate code to delete the object if
10869 necessary. Do that now. */
10872 finish_destructor_body (void)
10876 /* Any return from a destructor will end up here; that way all base
10877 and member cleanups will be run when the function returns. */
10878 add_stmt (build_stmt (LABEL_EXPR, cdtor_label));
10880 /* In a virtual destructor, we must call delete. */
10881 if (DECL_VIRTUAL_P (current_function_decl))
10884 tree virtual_size = cxx_sizeof (current_class_type);
10888 At the point of definition of a virtual destructor (including
10889 an implicit definition), non-placement operator delete shall
10890 be looked up in the scope of the destructor's class and if
10891 found shall be accessible and unambiguous. */
10892 exprstmt = build_op_delete_call(DELETE_EXPR, current_class_ptr,
10894 /*global_p=*/false,
10895 /*placement=*/NULL_TREE,
10896 /*alloc_fn=*/NULL_TREE);
10898 if_stmt = begin_if_stmt ();
10899 finish_if_stmt_cond (build2 (BIT_AND_EXPR, integer_type_node,
10900 current_in_charge_parm,
10903 finish_expr_stmt (exprstmt);
10904 finish_then_clause (if_stmt);
10905 finish_if_stmt (if_stmt);
10908 if (targetm.cxx.cdtor_returns_this ())
10912 val = DECL_ARGUMENTS (current_function_decl);
10913 val = build2 (MODIFY_EXPR, TREE_TYPE (val),
10914 DECL_RESULT (current_function_decl), val);
10915 /* Return the address of the object. */
10916 exprstmt = build_stmt (RETURN_EXPR, val);
10917 add_stmt (exprstmt);
10921 /* Do the necessary processing for the beginning of a function body, which
10922 in this case includes member-initializers, but not the catch clauses of
10923 a function-try-block. Currently, this means opening a binding level
10924 for the member-initializers (in a ctor) and member cleanups (in a dtor). */
10927 begin_function_body (void)
10931 if (! FUNCTION_NEEDS_BODY_BLOCK (current_function_decl))
10934 if (processing_template_decl)
10935 /* Do nothing now. */;
10937 /* Always keep the BLOCK node associated with the outermost pair of
10938 curly braces of a function. These are needed for correct
10939 operation of dwarfout.c. */
10940 keep_next_level (true);
10942 stmt = begin_compound_stmt (BCS_FN_BODY);
10944 if (processing_template_decl)
10945 /* Do nothing now. */;
10946 else if (DECL_DESTRUCTOR_P (current_function_decl))
10947 begin_destructor_body ();
10952 /* Do the processing for the end of a function body. Currently, this means
10953 closing out the cleanups for fully-constructed bases and members, and in
10954 the case of the destructor, deleting the object if desired. Again, this
10955 is only meaningful for [cd]tors, since they are the only functions where
10956 there is a significant distinction between the main body and any
10957 function catch clauses. Handling, say, main() return semantics here
10958 would be wrong, as flowing off the end of a function catch clause for
10959 main() would also need to return 0. */
10962 finish_function_body (tree compstmt)
10964 if (compstmt == NULL_TREE)
10967 /* Close the block. */
10968 finish_compound_stmt (compstmt);
10970 if (processing_template_decl)
10971 /* Do nothing now. */;
10972 else if (DECL_CONSTRUCTOR_P (current_function_decl))
10973 finish_constructor_body ();
10974 else if (DECL_DESTRUCTOR_P (current_function_decl))
10975 finish_destructor_body ();
10978 /* Given a function, returns the BLOCK corresponding to the outermost level
10979 of curly braces, skipping the artificial block created for constructor
10983 outer_curly_brace_block (tree fndecl)
10985 tree block = BLOCK_SUBBLOCKS (DECL_INITIAL (fndecl));
10986 if (FUNCTION_NEEDS_BODY_BLOCK (current_function_decl))
10987 /* Skip the artificial function body block. */
10988 block = BLOCK_SUBBLOCKS (block);
10992 /* Finish up a function declaration and compile that function
10993 all the way to assembler language output. The free the storage
10994 for the function definition.
10996 FLAGS is a bitwise or of the following values:
10998 We just finished processing the body of an in-class inline
10999 function definition. (This processing will have taken place
11000 after the class definition is complete.) */
11003 finish_function (int flags)
11005 tree fndecl = current_function_decl;
11006 tree fntype, ctype = NULL_TREE;
11007 int inclass_inline = (flags & 2) != 0;
11010 /* When we get some parse errors, we can end up without a
11011 current_function_decl, so cope. */
11012 if (fndecl == NULL_TREE)
11013 return error_mark_node;
11015 if (DECL_NONSTATIC_MEMBER_FUNCTION_P (fndecl)
11016 && DECL_VIRTUAL_P (fndecl)
11017 && !processing_template_decl)
11019 tree fnclass = DECL_CONTEXT (fndecl);
11020 if (fndecl == CLASSTYPE_KEY_METHOD (fnclass))
11021 keyed_classes = tree_cons (NULL_TREE, fnclass, keyed_classes);
11024 nested = function_depth > 1;
11025 fntype = TREE_TYPE (fndecl);
11027 /* TREE_READONLY (fndecl) = 1;
11028 This caused &foo to be of type ptr-to-const-function
11029 which then got a warning when stored in a ptr-to-function variable. */
11031 gcc_assert (building_stmt_tree ());
11033 /* For a cloned function, we've already got all the code we need;
11034 there's no need to add any extra bits. */
11035 if (!DECL_CLONED_FUNCTION_P (fndecl))
11037 if (DECL_MAIN_P (current_function_decl))
11041 /* Make it so that `main' always returns 0 by default (or
11044 stmt = finish_return_stmt (integer_one_node);
11046 stmt = finish_return_stmt (integer_zero_node);
11048 /* Hack. We don't want the middle-end to warn that this
11049 return is unreachable, so put the statement on the
11051 #ifdef USE_MAPPED_LOCATION
11052 SET_EXPR_LOCATION (stmt, UNKNOWN_LOCATION);
11054 annotate_with_file_line (stmt, input_filename, 0);
11058 if (use_eh_spec_block (current_function_decl))
11059 finish_eh_spec_block (TYPE_RAISES_EXCEPTIONS
11060 (TREE_TYPE (current_function_decl)),
11061 current_eh_spec_block);
11064 /* If we're saving up tree structure, tie off the function now. */
11065 DECL_SAVED_TREE (fndecl) = pop_stmt_list (DECL_SAVED_TREE (fndecl));
11067 finish_fname_decls ();
11069 /* If this function can't throw any exceptions, remember that. */
11070 if (!processing_template_decl
11071 && !cp_function_chain->can_throw
11072 && !flag_non_call_exceptions)
11073 TREE_NOTHROW (fndecl) = 1;
11075 /* This must come after expand_function_end because cleanups might
11076 have declarations (from inline functions) that need to go into
11077 this function's blocks. */
11079 /* If the current binding level isn't the outermost binding level
11080 for this function, either there is a bug, or we have experienced
11081 syntax errors and the statement tree is malformed. */
11082 if (current_binding_level->kind != sk_function_parms)
11084 /* Make sure we have already experienced errors. */
11085 gcc_assert (errorcount);
11087 /* Throw away the broken statement tree and extra binding
11089 DECL_SAVED_TREE (fndecl) = alloc_stmt_list ();
11091 while (current_binding_level->kind != sk_function_parms)
11093 if (current_binding_level->kind == sk_class)
11094 pop_nested_class ();
11096 poplevel (0, 0, 0);
11099 poplevel (1, 0, 1);
11101 /* Statements should always be full-expressions at the outermost set
11102 of curly braces for a function. */
11103 gcc_assert (stmts_are_full_exprs_p ());
11105 /* Set up the named return value optimization, if we can. Candidate
11106 variables are selected in check_return_value. */
11107 if (current_function_return_value)
11109 tree r = current_function_return_value;
11112 if (r != error_mark_node
11113 /* This is only worth doing for fns that return in memory--and
11114 simpler, since we don't have to worry about promoted modes. */
11115 && aggregate_value_p (TREE_TYPE (TREE_TYPE (fndecl)), fndecl)
11116 /* Only allow this for variables declared in the outer scope of
11117 the function so we know that their lifetime always ends with a
11118 return; see g++.dg/opt/nrv6.C. We could be more flexible if
11119 we were to do this optimization in tree-ssa. */
11120 && (outer = outer_curly_brace_block (fndecl))
11121 && chain_member (r, BLOCK_VARS (outer)))
11122 finalize_nrv (&DECL_SAVED_TREE (fndecl), r, DECL_RESULT (fndecl));
11124 current_function_return_value = NULL_TREE;
11127 /* Remember that we were in class scope. */
11128 if (current_class_name)
11129 ctype = current_class_type;
11131 /* Must mark the RESULT_DECL as being in this function. */
11132 DECL_CONTEXT (DECL_RESULT (fndecl)) = fndecl;
11134 /* Set the BLOCK_SUPERCONTEXT of the outermost function scope to point
11135 to the FUNCTION_DECL node itself. */
11136 BLOCK_SUPERCONTEXT (DECL_INITIAL (fndecl)) = fndecl;
11138 /* Save away current state, if appropriate. */
11139 if (!processing_template_decl)
11140 save_function_data (fndecl);
11142 /* Complain if there's just no return statement. */
11143 if (warn_return_type
11144 && TREE_CODE (TREE_TYPE (fntype)) != VOID_TYPE
11145 && !dependent_type_p (TREE_TYPE (fntype))
11146 && !current_function_returns_value && !current_function_returns_null
11147 /* Don't complain if we abort or throw. */
11148 && !current_function_returns_abnormally
11149 && !DECL_NAME (DECL_RESULT (fndecl))
11150 /* Normally, with -Wreturn-type, flow will complain. Unless we're an
11151 inline function, as we might never be compiled separately. */
11152 && (DECL_INLINE (fndecl) || processing_template_decl)
11153 /* Structor return values (if any) are set by the compiler. */
11154 && !DECL_CONSTRUCTOR_P (fndecl)
11155 && !DECL_DESTRUCTOR_P (fndecl))
11156 warning (OPT_Wreturn_type, "no return statement in function returning non-void");
11158 /* Store the end of the function, so that we get good line number
11159 info for the epilogue. */
11160 cfun->function_end_locus = input_location;
11162 /* Genericize before inlining. */
11163 if (!processing_template_decl)
11165 struct language_function *f = DECL_SAVED_FUNCTION_DATA (fndecl);
11166 cp_genericize (fndecl);
11167 /* Clear out the bits we don't need. */
11168 f->x_current_class_ptr = NULL;
11169 f->x_current_class_ref = NULL;
11170 f->x_eh_spec_block = NULL;
11171 f->x_in_charge_parm = NULL;
11172 f->x_vtt_parm = NULL;
11173 f->x_return_value = NULL;
11174 f->bindings = NULL;
11175 f->extern_decl_map = NULL;
11177 /* Handle attribute((warn_unused_result)). Relies on gimple input. */
11178 c_warn_unused_result (&DECL_SAVED_TREE (fndecl));
11180 /* Clear out the bits we don't need. */
11181 local_names = NULL;
11183 /* We're leaving the context of this function, so zap cfun. It's still in
11184 DECL_STRUCT_FUNCTION, and we'll restore it in tree_rest_of_compilation. */
11186 current_function_decl = NULL;
11188 /* If this is an in-class inline definition, we may have to pop the
11189 bindings for the template parameters that we added in
11190 maybe_begin_member_template_processing when start_function was
11192 if (inclass_inline)
11193 maybe_end_member_template_processing ();
11195 /* Leave the scope of the class. */
11197 pop_nested_class ();
11203 /* Let the error reporting routines know that we're outside a
11204 function. For a nested function, this value is used in
11205 cxx_pop_function_context and then reset via pop_function_context. */
11206 current_function_decl = NULL_TREE;
11211 /* Create the FUNCTION_DECL for a function definition.
11212 DECLSPECS and DECLARATOR are the parts of the declaration;
11213 they describe the return type and the name of the function,
11214 but twisted together in a fashion that parallels the syntax of C.
11216 This function creates a binding context for the function body
11217 as well as setting up the FUNCTION_DECL in current_function_decl.
11219 Returns a FUNCTION_DECL on success.
11221 If the DECLARATOR is not suitable for a function (it defines a datum
11222 instead), we return 0, which tells yyparse to report a parse error.
11224 May return void_type_node indicating that this method is actually
11225 a friend. See grokfield for more details.
11227 Came here with a `.pushlevel' .
11229 DO NOT MAKE ANY CHANGES TO THIS CODE WITHOUT MAKING CORRESPONDING
11230 CHANGES TO CODE IN `grokfield'. */
11233 start_method (cp_decl_specifier_seq *declspecs,
11234 const cp_declarator *declarator, tree attrlist)
11236 tree fndecl = grokdeclarator (declarator, declspecs, MEMFUNCDEF, 0,
11239 if (fndecl == error_mark_node)
11240 return error_mark_node;
11242 if (fndecl == NULL || TREE_CODE (fndecl) != FUNCTION_DECL)
11244 error ("invalid member function declaration");
11245 return error_mark_node;
11249 cplus_decl_attributes (&fndecl, attrlist, 0);
11251 /* Pass friends other than inline friend functions back. */
11252 if (fndecl == void_type_node)
11255 if (DECL_IN_AGGR_P (fndecl))
11257 if (DECL_CONTEXT (fndecl)
11258 && TREE_CODE (DECL_CONTEXT (fndecl)) != NAMESPACE_DECL)
11259 error ("%qD is already defined in class %qT", fndecl,
11260 DECL_CONTEXT (fndecl));
11261 return error_mark_node;
11264 check_template_shadow (fndecl);
11266 DECL_DECLARED_INLINE_P (fndecl) = 1;
11267 if (flag_default_inline)
11268 DECL_INLINE (fndecl) = 1;
11270 /* We process method specializations in finish_struct_1. */
11271 if (processing_template_decl && !DECL_TEMPLATE_SPECIALIZATION (fndecl))
11273 fndecl = push_template_decl (fndecl);
11274 if (fndecl == error_mark_node)
11278 if (! DECL_FRIEND_P (fndecl))
11280 if (TREE_CHAIN (fndecl))
11282 fndecl = copy_node (fndecl);
11283 TREE_CHAIN (fndecl) = NULL_TREE;
11287 finish_decl (fndecl, NULL_TREE, NULL_TREE);
11289 /* Make a place for the parms. */
11290 begin_scope (sk_function_parms, fndecl);
11292 DECL_IN_AGGR_P (fndecl) = 1;
11296 /* Go through the motions of finishing a function definition.
11297 We don't compile this method until after the whole class has
11300 FINISH_METHOD must return something that looks as though it
11301 came from GROKFIELD (since we are defining a method, after all).
11303 This is called after parsing the body of the function definition.
11304 STMTS is the chain of statements that makes up the function body.
11306 DECL is the ..._DECL that `start_method' provided. */
11309 finish_method (tree decl)
11311 tree fndecl = decl;
11316 if (decl == void_type_node)
11319 old_initial = DECL_INITIAL (fndecl);
11321 /* Undo the level for the parms (from start_method).
11322 This is like poplevel, but it causes nothing to be
11323 saved. Saving information here confuses symbol-table
11324 output routines. Besides, this information will
11325 be correctly output when this method is actually
11328 /* Clear out the meanings of the local variables of this level;
11329 also record in each decl which block it belongs to. */
11331 for (link = current_binding_level->names; link; link = TREE_CHAIN (link))
11333 if (DECL_NAME (link) != NULL_TREE)
11334 pop_binding (DECL_NAME (link), link);
11335 gcc_assert (TREE_CODE (link) != FUNCTION_DECL);
11336 DECL_CONTEXT (link) = NULL_TREE;
11339 poplevel (0, 0, 0);
11341 DECL_INITIAL (fndecl) = old_initial;
11343 /* We used to check if the context of FNDECL was different from
11344 current_class_type as another way to get inside here. This didn't work
11345 for String.cc in libg++. */
11346 if (DECL_FRIEND_P (fndecl))
11348 VEC_safe_push (tree, gc, CLASSTYPE_INLINE_FRIENDS (current_class_type),
11350 decl = void_type_node;
11357 /* VAR is a VAR_DECL. If its type is incomplete, remember VAR so that
11358 we can lay it out later, when and if its type becomes complete. */
11361 maybe_register_incomplete_var (tree var)
11363 gcc_assert (TREE_CODE (var) == VAR_DECL);
11365 /* Keep track of variables with incomplete types. */
11366 if (!processing_template_decl && TREE_TYPE (var) != error_mark_node
11367 && DECL_EXTERNAL (var))
11369 tree inner_type = TREE_TYPE (var);
11371 while (TREE_CODE (inner_type) == ARRAY_TYPE)
11372 inner_type = TREE_TYPE (inner_type);
11373 inner_type = TYPE_MAIN_VARIANT (inner_type);
11375 if ((!COMPLETE_TYPE_P (inner_type) && CLASS_TYPE_P (inner_type))
11376 /* RTTI TD entries are created while defining the type_info. */
11377 || (TYPE_LANG_SPECIFIC (inner_type)
11378 && TYPE_BEING_DEFINED (inner_type)))
11379 incomplete_vars = tree_cons (inner_type, var, incomplete_vars);
11383 /* Called when a class type (given by TYPE) is defined. If there are
11384 any existing VAR_DECLs whose type hsa been completed by this
11385 declaration, update them now. */
11388 complete_vars (tree type)
11390 tree *list = &incomplete_vars;
11392 gcc_assert (CLASS_TYPE_P (type));
11395 if (same_type_p (type, TREE_PURPOSE (*list)))
11397 tree var = TREE_VALUE (*list);
11398 tree type = TREE_TYPE (var);
11399 /* Complete the type of the variable. The VAR_DECL itself
11400 will be laid out in expand_expr. */
11401 complete_type (type);
11402 cp_apply_type_quals_to_decl (cp_type_quals (type), var);
11403 /* Remove this entry from the list. */
11404 *list = TREE_CHAIN (*list);
11407 list = &TREE_CHAIN (*list);
11410 /* Check for pending declarations which may have abstract type. */
11411 complete_type_check_abstract (type);
11414 /* If DECL is of a type which needs a cleanup, build that cleanup
11418 cxx_maybe_build_cleanup (tree decl)
11420 tree type = TREE_TYPE (decl);
11422 if (type != error_mark_node && TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type))
11424 int flags = LOOKUP_NORMAL|LOOKUP_DESTRUCTOR;
11426 bool has_vbases = (TREE_CODE (type) == RECORD_TYPE
11427 && CLASSTYPE_VBASECLASSES (type));
11429 if (TREE_CODE (type) == ARRAY_TYPE)
11433 cxx_mark_addressable (decl);
11434 rval = build_unary_op (ADDR_EXPR, decl, 0);
11437 /* Optimize for space over speed here. */
11438 if (!has_vbases || flag_expensive_optimizations)
11439 flags |= LOOKUP_NONVIRTUAL;
11441 rval = build_delete (TREE_TYPE (rval), rval,
11442 sfk_complete_destructor, flags, 0);
11449 /* When a stmt has been parsed, this function is called. */
11456 /* DECL was originally constructed as a non-static member function,
11457 but turned out to be static. Update it accordingly. */
11460 revert_static_member_fn (tree decl)
11463 tree function = TREE_TYPE (decl);
11464 tree args = TYPE_ARG_TYPES (function);
11466 if (cp_type_quals (TREE_TYPE (TREE_VALUE (args)))
11467 != TYPE_UNQUALIFIED)
11468 error ("static member function %q#D declared with type qualifiers", decl);
11470 args = TREE_CHAIN (args);
11471 tmp = build_function_type (TREE_TYPE (function), args);
11472 tmp = build_qualified_type (tmp, cp_type_quals (function));
11473 tmp = build_exception_variant (tmp,
11474 TYPE_RAISES_EXCEPTIONS (function));
11475 TREE_TYPE (decl) = tmp;
11476 if (DECL_ARGUMENTS (decl))
11477 DECL_ARGUMENTS (decl) = TREE_CHAIN (DECL_ARGUMENTS (decl));
11478 DECL_STATIC_FUNCTION_P (decl) = 1;
11481 /* Initialize the variables used during compilation of a C++
11485 cxx_push_function_context (struct function * f)
11487 struct language_function *p = GGC_CNEW (struct language_function);
11490 /* Whenever we start a new function, we destroy temporaries in the
11492 current_stmt_tree ()->stmts_are_full_exprs_p = 1;
11498 if (DECL_SAVED_FUNCTION_DATA (fn))
11500 /* If we already parsed this function, and we're just expanding it
11501 now, restore saved state. */
11502 *cp_function_chain = *DECL_SAVED_FUNCTION_DATA (fn);
11504 /* We don't need the saved data anymore. Unless this is an inline
11505 function; we need the named return value info for
11506 declare_return_variable. */
11507 if (! DECL_INLINE (fn))
11508 DECL_SAVED_FUNCTION_DATA (fn) = NULL;
11513 /* Free the language-specific parts of F, now that we've finished
11514 compiling the function. */
11517 cxx_pop_function_context (struct function * f)
11522 /* Return which tree structure is used by T, or TS_CP_GENERIC if T is
11523 one of the language-independent trees. */
11525 enum cp_tree_node_structure_enum
11526 cp_tree_node_structure (union lang_tree_node * t)
11528 switch (TREE_CODE (&t->generic))
11530 case DEFAULT_ARG: return TS_CP_DEFAULT_ARG;
11531 case IDENTIFIER_NODE: return TS_CP_IDENTIFIER;
11532 case OVERLOAD: return TS_CP_OVERLOAD;
11533 case TEMPLATE_PARM_INDEX: return TS_CP_TPI;
11534 case TINST_LEVEL: return TS_CP_TINST_LEVEL;
11535 case PTRMEM_CST: return TS_CP_PTRMEM;
11536 case BASELINK: return TS_CP_BASELINK;
11537 default: return TS_CP_GENERIC;
11541 /* Build the void_list_node (void_type_node having been created). */
11543 build_void_list_node (void)
11545 tree t = build_tree_list (NULL_TREE, void_type_node);
11550 cp_missing_noreturn_ok_p (tree decl)
11552 /* A missing noreturn is ok for the `main' function. */
11553 return DECL_MAIN_P (decl);
11556 /* Return the COMDAT group into which DECL should be placed. */
11559 cxx_comdat_group (tree decl)
11563 /* Virtual tables, construction virtual tables, and virtual table
11564 tables all go in a single COMDAT group, named after the primary
11566 if (TREE_CODE (decl) == VAR_DECL && DECL_VTABLE_OR_VTT_P (decl))
11567 name = DECL_ASSEMBLER_NAME (CLASSTYPE_VTABLES (DECL_CONTEXT (decl)));
11568 /* For all other DECLs, the COMDAT group is the mangled name of the
11569 declaration itself. */
11572 while (DECL_THUNK_P (decl))
11574 /* If TARGET_USE_LOCAL_THUNK_ALIAS_P, use_thunk puts the thunk
11575 into the same section as the target function. In that case
11576 we must return target's name. */
11577 tree target = THUNK_TARGET (decl);
11578 if (TARGET_USE_LOCAL_THUNK_ALIAS_P (target)
11579 && DECL_SECTION_NAME (target) != NULL
11580 && DECL_ONE_ONLY (target))
11585 name = DECL_ASSEMBLER_NAME (decl);
11588 return IDENTIFIER_POINTER (name);
11591 #include "gt-cp-decl.h"