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_INVALID_OVERRIDER_P (newdecl) |= DECL_INVALID_OVERRIDER_P (olddecl);
1577 DECL_THIS_STATIC (newdecl) |= DECL_THIS_STATIC (olddecl);
1578 if (DECL_OVERLOADED_OPERATOR_P (olddecl) != ERROR_MARK)
1579 SET_OVERLOADED_OPERATOR_CODE
1580 (newdecl, DECL_OVERLOADED_OPERATOR_P (olddecl));
1581 new_defines_function = DECL_INITIAL (newdecl) != NULL_TREE;
1583 /* Optionally warn about more than one declaration for the same
1584 name, but don't warn about a function declaration followed by a
1586 if (warn_redundant_decls && ! DECL_ARTIFICIAL (olddecl)
1587 && !(new_defines_function && DECL_INITIAL (olddecl) == NULL_TREE)
1588 /* Don't warn about extern decl followed by definition. */
1589 && !(DECL_EXTERNAL (olddecl) && ! DECL_EXTERNAL (newdecl))
1590 /* Don't warn about friends, let add_friend take care of it. */
1591 && ! (newdecl_is_friend || DECL_FRIEND_P (olddecl)))
1593 warning (OPT_Wredundant_decls, "redundant redeclaration of %qD in same scope", newdecl);
1594 warning (OPT_Wredundant_decls, "previous declaration of %q+D", olddecl);
1598 /* Deal with C++: must preserve virtual function table size. */
1599 if (TREE_CODE (olddecl) == TYPE_DECL)
1601 tree newtype = TREE_TYPE (newdecl);
1602 tree oldtype = TREE_TYPE (olddecl);
1604 if (newtype != error_mark_node && oldtype != error_mark_node
1605 && TYPE_LANG_SPECIFIC (newtype) && TYPE_LANG_SPECIFIC (oldtype))
1606 CLASSTYPE_FRIEND_CLASSES (newtype)
1607 = CLASSTYPE_FRIEND_CLASSES (oldtype);
1609 DECL_ORIGINAL_TYPE (newdecl) = DECL_ORIGINAL_TYPE (olddecl);
1612 /* Copy all the DECL_... slots specified in the new decl
1613 except for any that we copy here from the old type. */
1614 DECL_ATTRIBUTES (newdecl)
1615 = (*targetm.merge_decl_attributes) (olddecl, newdecl);
1617 if (TREE_CODE (newdecl) == TEMPLATE_DECL)
1621 old_result = DECL_TEMPLATE_RESULT (olddecl);
1622 new_result = DECL_TEMPLATE_RESULT (newdecl);
1623 TREE_TYPE (olddecl) = TREE_TYPE (old_result);
1624 DECL_TEMPLATE_SPECIALIZATIONS (olddecl)
1625 = chainon (DECL_TEMPLATE_SPECIALIZATIONS (olddecl),
1626 DECL_TEMPLATE_SPECIALIZATIONS (newdecl));
1628 if (DECL_FUNCTION_TEMPLATE_P (newdecl))
1630 DECL_INLINE (old_result)
1631 |= DECL_INLINE (new_result);
1632 DECL_DECLARED_INLINE_P (old_result)
1633 |= DECL_DECLARED_INLINE_P (new_result);
1634 check_redeclaration_exception_specification (newdecl, olddecl);
1637 /* If the new declaration is a definition, update the file and
1638 line information on the declaration. */
1639 if (DECL_INITIAL (old_result) == NULL_TREE
1640 && DECL_INITIAL (new_result) != NULL_TREE)
1642 DECL_SOURCE_LOCATION (olddecl)
1643 = DECL_SOURCE_LOCATION (old_result)
1644 = DECL_SOURCE_LOCATION (newdecl);
1645 if (DECL_FUNCTION_TEMPLATE_P (newdecl))
1646 DECL_ARGUMENTS (old_result)
1647 = DECL_ARGUMENTS (new_result);
1655 /* Automatically handles default parameters. */
1656 tree oldtype = TREE_TYPE (olddecl);
1659 /* Merge the data types specified in the two decls. */
1660 newtype = merge_types (TREE_TYPE (newdecl), TREE_TYPE (olddecl));
1662 /* If merge_types produces a non-typedef type, just use the old type. */
1663 if (TREE_CODE (newdecl) == TYPE_DECL
1664 && newtype == DECL_ORIGINAL_TYPE (newdecl))
1667 if (TREE_CODE (newdecl) == VAR_DECL)
1669 DECL_THIS_EXTERN (newdecl) |= DECL_THIS_EXTERN (olddecl);
1670 DECL_INITIALIZED_P (newdecl) |= DECL_INITIALIZED_P (olddecl);
1671 DECL_NONTRIVIALLY_INITIALIZED_P (newdecl)
1672 |= DECL_NONTRIVIALLY_INITIALIZED_P (olddecl);
1673 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (newdecl)
1674 |= DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (olddecl);
1676 /* Merge the threadprivate attribute from OLDDECL into NEWDECL. */
1677 if (DECL_LANG_SPECIFIC (olddecl)
1678 && CP_DECL_THREADPRIVATE_P (olddecl))
1680 /* Allocate a LANG_SPECIFIC structure for NEWDECL, if needed. */
1681 if (!DECL_LANG_SPECIFIC (newdecl))
1682 retrofit_lang_decl (newdecl);
1684 DECL_TLS_MODEL (newdecl) = DECL_TLS_MODEL (olddecl);
1685 CP_DECL_THREADPRIVATE_P (newdecl) = 1;
1689 /* Do this after calling `merge_types' so that default
1690 parameters don't confuse us. */
1691 else if (TREE_CODE (newdecl) == FUNCTION_DECL)
1692 check_redeclaration_exception_specification (newdecl, olddecl);
1693 TREE_TYPE (newdecl) = TREE_TYPE (olddecl) = newtype;
1695 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1696 check_default_args (newdecl);
1698 /* Lay the type out, unless already done. */
1699 if (! same_type_p (newtype, oldtype)
1700 && TREE_TYPE (newdecl) != error_mark_node
1701 && !(processing_template_decl && uses_template_parms (newdecl)))
1702 layout_type (TREE_TYPE (newdecl));
1704 if ((TREE_CODE (newdecl) == VAR_DECL
1705 || TREE_CODE (newdecl) == PARM_DECL
1706 || TREE_CODE (newdecl) == RESULT_DECL
1707 || TREE_CODE (newdecl) == FIELD_DECL
1708 || TREE_CODE (newdecl) == TYPE_DECL)
1709 && !(processing_template_decl && uses_template_parms (newdecl)))
1710 layout_decl (newdecl, 0);
1712 /* Merge the type qualifiers. */
1713 if (TREE_READONLY (newdecl))
1714 TREE_READONLY (olddecl) = 1;
1715 if (TREE_THIS_VOLATILE (newdecl))
1716 TREE_THIS_VOLATILE (olddecl) = 1;
1717 if (TREE_NOTHROW (newdecl))
1718 TREE_NOTHROW (olddecl) = 1;
1720 /* Merge deprecatedness. */
1721 if (TREE_DEPRECATED (newdecl))
1722 TREE_DEPRECATED (olddecl) = 1;
1724 /* Merge the initialization information. */
1725 if (DECL_INITIAL (newdecl) == NULL_TREE
1726 && DECL_INITIAL (olddecl) != NULL_TREE)
1728 DECL_INITIAL (newdecl) = DECL_INITIAL (olddecl);
1729 DECL_SOURCE_LOCATION (newdecl) = DECL_SOURCE_LOCATION (olddecl);
1730 if (CAN_HAVE_FULL_LANG_DECL_P (newdecl)
1731 && DECL_LANG_SPECIFIC (newdecl)
1732 && DECL_LANG_SPECIFIC (olddecl))
1734 DECL_SAVED_TREE (newdecl) = DECL_SAVED_TREE (olddecl);
1735 DECL_STRUCT_FUNCTION (newdecl) = DECL_STRUCT_FUNCTION (olddecl);
1739 /* Merge the section attribute.
1740 We want to issue an error if the sections conflict but that must be
1741 done later in decl_attributes since we are called before attributes
1743 if (DECL_SECTION_NAME (newdecl) == NULL_TREE)
1744 DECL_SECTION_NAME (newdecl) = DECL_SECTION_NAME (olddecl);
1746 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1748 DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (newdecl)
1749 |= DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (olddecl);
1750 DECL_NO_LIMIT_STACK (newdecl) |= DECL_NO_LIMIT_STACK (olddecl);
1751 TREE_THIS_VOLATILE (newdecl) |= TREE_THIS_VOLATILE (olddecl);
1752 TREE_READONLY (newdecl) |= TREE_READONLY (olddecl);
1753 TREE_NOTHROW (newdecl) |= TREE_NOTHROW (olddecl);
1754 DECL_IS_MALLOC (newdecl) |= DECL_IS_MALLOC (olddecl);
1755 DECL_IS_PURE (newdecl) |= DECL_IS_PURE (olddecl);
1756 /* Keep the old RTL. */
1757 COPY_DECL_RTL (olddecl, newdecl);
1759 else if (TREE_CODE (newdecl) == VAR_DECL
1760 && (DECL_SIZE (olddecl) || !DECL_SIZE (newdecl)))
1762 /* Keep the old RTL. We cannot keep the old RTL if the old
1763 declaration was for an incomplete object and the new
1764 declaration is not since many attributes of the RTL will
1766 COPY_DECL_RTL (olddecl, newdecl);
1769 /* If cannot merge, then use the new type and qualifiers,
1770 and don't preserve the old rtl. */
1773 /* Clean out any memory we had of the old declaration. */
1774 tree oldstatic = value_member (olddecl, static_aggregates);
1776 TREE_VALUE (oldstatic) = error_mark_node;
1778 TREE_TYPE (olddecl) = TREE_TYPE (newdecl);
1779 TREE_READONLY (olddecl) = TREE_READONLY (newdecl);
1780 TREE_THIS_VOLATILE (olddecl) = TREE_THIS_VOLATILE (newdecl);
1781 TREE_SIDE_EFFECTS (olddecl) = TREE_SIDE_EFFECTS (newdecl);
1784 /* Merge the storage class information. */
1785 merge_weak (newdecl, olddecl);
1787 DECL_ONE_ONLY (newdecl) |= DECL_ONE_ONLY (olddecl);
1788 DECL_DEFER_OUTPUT (newdecl) |= DECL_DEFER_OUTPUT (olddecl);
1789 TREE_PUBLIC (newdecl) = TREE_PUBLIC (olddecl);
1790 TREE_STATIC (olddecl) = TREE_STATIC (newdecl) |= TREE_STATIC (olddecl);
1791 if (! DECL_EXTERNAL (olddecl))
1792 DECL_EXTERNAL (newdecl) = 0;
1794 new_template = NULL_TREE;
1795 if (DECL_LANG_SPECIFIC (newdecl) && DECL_LANG_SPECIFIC (olddecl))
1797 DECL_INTERFACE_KNOWN (newdecl) |= DECL_INTERFACE_KNOWN (olddecl);
1798 DECL_NOT_REALLY_EXTERN (newdecl) |= DECL_NOT_REALLY_EXTERN (olddecl);
1799 DECL_COMDAT (newdecl) |= DECL_COMDAT (olddecl);
1800 DECL_TEMPLATE_INSTANTIATED (newdecl)
1801 |= DECL_TEMPLATE_INSTANTIATED (olddecl);
1803 /* If the OLDDECL is an instantiation and/or specialization,
1804 then the NEWDECL must be too. But, it may not yet be marked
1805 as such if the caller has created NEWDECL, but has not yet
1806 figured out that it is a redeclaration. */
1807 if (!DECL_USE_TEMPLATE (newdecl))
1808 DECL_USE_TEMPLATE (newdecl) = DECL_USE_TEMPLATE (olddecl);
1810 /* Don't really know how much of the language-specific
1811 values we should copy from old to new. */
1812 DECL_IN_AGGR_P (newdecl) = DECL_IN_AGGR_P (olddecl);
1813 DECL_LANG_SPECIFIC (newdecl)->decl_flags.u2 =
1814 DECL_LANG_SPECIFIC (olddecl)->decl_flags.u2;
1815 DECL_NONCONVERTING_P (newdecl) = DECL_NONCONVERTING_P (olddecl);
1816 DECL_REPO_AVAILABLE_P (newdecl) = DECL_REPO_AVAILABLE_P (olddecl);
1817 if (DECL_TEMPLATE_INFO (newdecl))
1818 new_template = DECL_TI_TEMPLATE (newdecl);
1819 DECL_TEMPLATE_INFO (newdecl) = DECL_TEMPLATE_INFO (olddecl);
1820 DECL_INITIALIZED_IN_CLASS_P (newdecl)
1821 |= DECL_INITIALIZED_IN_CLASS_P (olddecl);
1822 olddecl_friend = DECL_FRIEND_P (olddecl);
1823 hidden_friend = (DECL_ANTICIPATED (olddecl)
1824 && DECL_HIDDEN_FRIEND_P (olddecl)
1825 && newdecl_is_friend);
1827 /* Only functions have DECL_BEFRIENDING_CLASSES. */
1828 if (TREE_CODE (newdecl) == FUNCTION_DECL
1829 || DECL_FUNCTION_TEMPLATE_P (newdecl))
1831 DECL_BEFRIENDING_CLASSES (newdecl)
1832 = chainon (DECL_BEFRIENDING_CLASSES (newdecl),
1833 DECL_BEFRIENDING_CLASSES (olddecl));
1834 /* DECL_THUNKS is only valid for virtual functions,
1835 otherwise it is a DECL_FRIEND_CONTEXT. */
1836 if (DECL_VIRTUAL_P (newdecl))
1837 DECL_THUNKS (newdecl) = DECL_THUNKS (olddecl);
1841 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1843 if (DECL_TEMPLATE_INSTANTIATION (olddecl)
1844 && !DECL_TEMPLATE_INSTANTIATION (newdecl))
1846 /* If newdecl is not a specialization, then it is not a
1847 template-related function at all. And that means that we
1848 should have exited above, returning 0. */
1849 gcc_assert (DECL_TEMPLATE_SPECIALIZATION (newdecl));
1851 if (TREE_USED (olddecl))
1852 /* From [temp.expl.spec]:
1854 If a template, a member template or the member of a class
1855 template is explicitly specialized then that
1856 specialization shall be declared before the first use of
1857 that specialization that would cause an implicit
1858 instantiation to take place, in every translation unit in
1859 which such a use occurs. */
1860 error ("explicit specialization of %qD after first use",
1863 SET_DECL_TEMPLATE_SPECIALIZATION (olddecl);
1865 /* Don't propagate visibility from the template to the
1866 specialization here. We'll do that in determine_visibility if
1868 DECL_VISIBILITY_SPECIFIED (olddecl) = 0;
1870 /* [temp.expl.spec/14] We don't inline explicit specialization
1871 just because the primary template says so. */
1875 if (DECL_PENDING_INLINE_INFO (newdecl) == 0)
1876 DECL_PENDING_INLINE_INFO (newdecl) = DECL_PENDING_INLINE_INFO (olddecl);
1878 DECL_DECLARED_INLINE_P (newdecl) |= DECL_DECLARED_INLINE_P (olddecl);
1880 /* If either decl says `inline', this fn is inline, unless
1881 its definition was passed already. */
1882 if (DECL_INLINE (newdecl) && DECL_INITIAL (olddecl) == NULL_TREE)
1883 DECL_INLINE (olddecl) = 1;
1884 DECL_INLINE (newdecl) = DECL_INLINE (olddecl);
1886 DECL_UNINLINABLE (newdecl) = DECL_UNINLINABLE (olddecl)
1887 = (DECL_UNINLINABLE (newdecl) || DECL_UNINLINABLE (olddecl));
1890 /* Preserve abstractness on cloned [cd]tors. */
1891 DECL_ABSTRACT (newdecl) = DECL_ABSTRACT (olddecl);
1895 SET_DECL_LANGUAGE (olddecl, DECL_LANGUAGE (newdecl));
1896 COPY_DECL_ASSEMBLER_NAME (newdecl, olddecl);
1897 COPY_DECL_RTL (newdecl, olddecl);
1899 if (! types_match || new_defines_function)
1901 /* These need to be copied so that the names are available.
1902 Note that if the types do match, we'll preserve inline
1903 info and other bits, but if not, we won't. */
1904 DECL_ARGUMENTS (olddecl) = DECL_ARGUMENTS (newdecl);
1905 DECL_RESULT (olddecl) = DECL_RESULT (newdecl);
1907 if (new_defines_function)
1908 /* If defining a function declared with other language
1909 linkage, use the previously declared language linkage. */
1910 SET_DECL_LANGUAGE (newdecl, DECL_LANGUAGE (olddecl));
1911 else if (types_match)
1913 /* If redeclaring a builtin function, and not a definition,
1914 it stays built in. */
1915 if (DECL_BUILT_IN (olddecl))
1917 DECL_BUILT_IN_CLASS (newdecl) = DECL_BUILT_IN_CLASS (olddecl);
1918 DECL_FUNCTION_CODE (newdecl) = DECL_FUNCTION_CODE (olddecl);
1919 /* If we're keeping the built-in definition, keep the rtl,
1920 regardless of declaration matches. */
1921 COPY_DECL_RTL (olddecl, newdecl);
1924 DECL_RESULT (newdecl) = DECL_RESULT (olddecl);
1925 /* Don't clear out the arguments if we're redefining a function. */
1926 if (DECL_ARGUMENTS (olddecl))
1927 DECL_ARGUMENTS (newdecl) = DECL_ARGUMENTS (olddecl);
1930 else if (TREE_CODE (newdecl) == NAMESPACE_DECL)
1931 NAMESPACE_LEVEL (newdecl) = NAMESPACE_LEVEL (olddecl);
1933 /* Now preserve various other info from the definition. */
1934 TREE_ADDRESSABLE (newdecl) = TREE_ADDRESSABLE (olddecl);
1935 TREE_ASM_WRITTEN (newdecl) = TREE_ASM_WRITTEN (olddecl);
1936 DECL_COMMON (newdecl) = DECL_COMMON (olddecl);
1937 COPY_DECL_ASSEMBLER_NAME (olddecl, newdecl);
1939 /* Warn about conflicting visibility specifications. */
1940 if (DECL_VISIBILITY_SPECIFIED (olddecl)
1941 && DECL_VISIBILITY_SPECIFIED (newdecl)
1942 && DECL_VISIBILITY (newdecl) != DECL_VISIBILITY (olddecl))
1944 warning (OPT_Wattributes, "%q+D: visibility attribute ignored "
1945 "because it", newdecl);
1946 warning (OPT_Wattributes, "%Jconflicts with previous "
1947 "declaration here", olddecl);
1949 /* Choose the declaration which specified visibility. */
1950 if (DECL_VISIBILITY_SPECIFIED (olddecl))
1952 DECL_VISIBILITY (newdecl) = DECL_VISIBILITY (olddecl);
1953 DECL_VISIBILITY_SPECIFIED (newdecl) = 1;
1955 /* Init priority used to be merged from newdecl to olddecl by the memcpy,
1956 so keep this behavior. */
1957 if (TREE_CODE (newdecl) == VAR_DECL && DECL_HAS_INIT_PRIORITY_P (newdecl))
1959 SET_DECL_INIT_PRIORITY (olddecl, DECL_INIT_PRIORITY (newdecl));
1960 DECL_HAS_INIT_PRIORITY_P (olddecl) = 1;
1963 /* The DECL_LANG_SPECIFIC information in OLDDECL will be replaced
1964 with that from NEWDECL below. */
1965 if (DECL_LANG_SPECIFIC (olddecl))
1967 gcc_assert (DECL_LANG_SPECIFIC (olddecl)
1968 != DECL_LANG_SPECIFIC (newdecl));
1969 ggc_free (DECL_LANG_SPECIFIC (olddecl));
1972 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1976 function_size = sizeof (struct tree_decl_common);
1978 memcpy ((char *) olddecl + sizeof (struct tree_common),
1979 (char *) newdecl + sizeof (struct tree_common),
1980 function_size - sizeof (struct tree_common));
1982 memcpy ((char *) olddecl + sizeof (struct tree_decl_common),
1983 (char *) newdecl + sizeof (struct tree_decl_common),
1984 sizeof (struct tree_function_decl) - sizeof (struct tree_decl_common));
1986 /* If newdecl is a template instantiation, it is possible that
1987 the following sequence of events has occurred:
1989 o A friend function was declared in a class template. The
1990 class template was instantiated.
1992 o The instantiation of the friend declaration was
1993 recorded on the instantiation list, and is newdecl.
1995 o Later, however, instantiate_class_template called pushdecl
1996 on the newdecl to perform name injection. But, pushdecl in
1997 turn called duplicate_decls when it discovered that another
1998 declaration of a global function with the same name already
2001 o Here, in duplicate_decls, we decided to clobber newdecl.
2003 If we're going to do that, we'd better make sure that
2004 olddecl, and not newdecl, is on the list of
2005 instantiations so that if we try to do the instantiation
2006 again we won't get the clobbered declaration. */
2007 reregister_specialization (newdecl,
2013 size_t size = tree_code_size (TREE_CODE (olddecl));
2014 memcpy ((char *) olddecl + sizeof (struct tree_common),
2015 (char *) newdecl + sizeof (struct tree_common),
2016 sizeof (struct tree_decl_common) - sizeof (struct tree_common));
2017 switch (TREE_CODE (olddecl))
2027 memcpy ((char *) olddecl + sizeof (struct tree_decl_common),
2028 (char *) newdecl + sizeof (struct tree_decl_common),
2029 size - sizeof (struct tree_decl_common)
2030 + TREE_CODE_LENGTH (TREE_CODE (newdecl)) * sizeof (char *));
2034 memcpy ((char *) olddecl + sizeof (struct tree_decl_common),
2035 (char *) newdecl + sizeof (struct tree_decl_common),
2036 sizeof (struct tree_decl_non_common) - sizeof (struct tree_decl_common)
2037 + TREE_CODE_LENGTH (TREE_CODE (newdecl)) * sizeof (char *));
2041 DECL_UID (olddecl) = olddecl_uid;
2043 DECL_FRIEND_P (olddecl) = 1;
2046 DECL_ANTICIPATED (olddecl) = 1;
2047 DECL_HIDDEN_FRIEND_P (olddecl) = 1;
2050 /* NEWDECL contains the merged attribute lists.
2051 Update OLDDECL to be the same. */
2052 DECL_ATTRIBUTES (olddecl) = DECL_ATTRIBUTES (newdecl);
2054 /* If OLDDECL had its DECL_RTL instantiated, re-invoke make_decl_rtl
2055 so that encode_section_info has a chance to look at the new decl
2056 flags and attributes. */
2057 if (DECL_RTL_SET_P (olddecl)
2058 && (TREE_CODE (olddecl) == FUNCTION_DECL
2059 || (TREE_CODE (olddecl) == VAR_DECL
2060 && TREE_STATIC (olddecl))))
2061 make_decl_rtl (olddecl);
2063 /* The NEWDECL will no longer be needed. Because every out-of-class
2064 declaration of a member results in a call to duplicate_decls,
2065 freeing these nodes represents in a significant savings. */
2071 /* Return zero if the declaration NEWDECL is valid
2072 when the declaration OLDDECL (assumed to be for the same name)
2073 has already been seen.
2074 Otherwise return an error message format string with a %s
2075 where the identifier should go. */
2078 redeclaration_error_message (tree newdecl, tree olddecl)
2080 if (TREE_CODE (newdecl) == TYPE_DECL)
2082 /* Because C++ can put things into name space for free,
2083 constructs like "typedef struct foo { ... } foo"
2084 would look like an erroneous redeclaration. */
2085 if (same_type_p (TREE_TYPE (newdecl), TREE_TYPE (olddecl)))
2088 return "redefinition of %q#D";
2090 else if (TREE_CODE (newdecl) == FUNCTION_DECL)
2092 /* If this is a pure function, its olddecl will actually be
2093 the original initialization to `0' (which we force to call
2094 abort()). Don't complain about redefinition in this case. */
2095 if (DECL_LANG_SPECIFIC (olddecl) && DECL_PURE_VIRTUAL_P (olddecl)
2096 && DECL_INITIAL (olddecl) == NULL_TREE)
2099 /* If both functions come from different namespaces, this is not
2100 a redeclaration - this is a conflict with a used function. */
2101 if (DECL_NAMESPACE_SCOPE_P (olddecl)
2102 && DECL_CONTEXT (olddecl) != DECL_CONTEXT (newdecl)
2103 && ! decls_match (olddecl, newdecl))
2104 return "%qD conflicts with used function";
2106 /* We'll complain about linkage mismatches in
2107 warn_extern_redeclared_static. */
2109 /* Defining the same name twice is no good. */
2110 if (DECL_INITIAL (olddecl) != NULL_TREE
2111 && DECL_INITIAL (newdecl) != NULL_TREE)
2113 if (DECL_NAME (olddecl) == NULL_TREE)
2114 return "%q#D not declared in class";
2116 return "redefinition of %q#D";
2120 else if (TREE_CODE (newdecl) == TEMPLATE_DECL)
2124 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == TYPE_DECL)
2126 if (COMPLETE_TYPE_P (TREE_TYPE (newdecl))
2127 && COMPLETE_TYPE_P (TREE_TYPE (olddecl)))
2128 return "redefinition of %q#D";
2132 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) != FUNCTION_DECL
2133 || (DECL_TEMPLATE_RESULT (newdecl)
2134 == DECL_TEMPLATE_RESULT (olddecl)))
2137 nt = DECL_TEMPLATE_RESULT (newdecl);
2138 if (DECL_TEMPLATE_INFO (nt))
2139 nt = DECL_TEMPLATE_RESULT (template_for_substitution (nt));
2140 ot = DECL_TEMPLATE_RESULT (olddecl);
2141 if (DECL_TEMPLATE_INFO (ot))
2142 ot = DECL_TEMPLATE_RESULT (template_for_substitution (ot));
2143 if (DECL_INITIAL (nt) && DECL_INITIAL (ot))
2144 return "redefinition of %q#D";
2148 else if (TREE_CODE (newdecl) == VAR_DECL
2149 && DECL_THREAD_LOCAL_P (newdecl) != DECL_THREAD_LOCAL_P (olddecl)
2150 && (! DECL_LANG_SPECIFIC (olddecl)
2151 || ! CP_DECL_THREADPRIVATE_P (olddecl)
2152 || DECL_THREAD_LOCAL_P (newdecl)))
2154 /* Only variables can be thread-local, and all declarations must
2155 agree on this property. */
2156 if (DECL_THREAD_LOCAL_P (newdecl))
2157 return "thread-local declaration of %q#D follows "
2158 "non-thread-local declaration";
2160 return "non-thread-local declaration of %q#D follows "
2161 "thread-local declaration";
2163 else if (toplevel_bindings_p () || DECL_NAMESPACE_SCOPE_P (newdecl))
2165 /* The objects have been declared at namespace scope. If either
2166 is a member of an anonymous union, then this is an invalid
2167 redeclaration. For example:
2173 if (DECL_ANON_UNION_VAR_P (newdecl)
2174 || DECL_ANON_UNION_VAR_P (olddecl))
2175 return "redeclaration of %q#D";
2176 /* If at least one declaration is a reference, there is no
2177 conflict. For example:
2183 if (DECL_EXTERNAL (newdecl) || DECL_EXTERNAL (olddecl))
2185 /* Reject two definitions. */
2186 return "redefinition of %q#D";
2190 /* Objects declared with block scope: */
2191 /* Reject two definitions, and reject a definition
2192 together with an external reference. */
2193 if (!(DECL_EXTERNAL (newdecl) && DECL_EXTERNAL (olddecl)))
2194 return "redeclaration of %q#D";
2199 /* Hash and equality functions for the named_label table. */
2202 named_label_entry_hash (const void *data)
2204 const struct named_label_entry *ent = (const struct named_label_entry *) data;
2205 return DECL_UID (ent->label_decl);
2209 named_label_entry_eq (const void *a, const void *b)
2211 const struct named_label_entry *ent_a = (const struct named_label_entry *) a;
2212 const struct named_label_entry *ent_b = (const struct named_label_entry *) b;
2213 return ent_a->label_decl == ent_b->label_decl;
2216 /* Create a new label, named ID. */
2219 make_label_decl (tree id, int local_p)
2221 struct named_label_entry *ent;
2225 decl = build_decl (LABEL_DECL, id, void_type_node);
2227 DECL_CONTEXT (decl) = current_function_decl;
2228 DECL_MODE (decl) = VOIDmode;
2229 C_DECLARED_LABEL_FLAG (decl) = local_p;
2231 /* Say where one reference is to the label, for the sake of the
2232 error if it is not defined. */
2233 DECL_SOURCE_LOCATION (decl) = input_location;
2235 /* Record the fact that this identifier is bound to this label. */
2236 SET_IDENTIFIER_LABEL_VALUE (id, decl);
2238 /* Create the label htab for the function on demand. */
2240 named_labels = htab_create_ggc (13, named_label_entry_hash,
2241 named_label_entry_eq, NULL);
2243 /* Record this label on the list of labels used in this function.
2244 We do this before calling make_label_decl so that we get the
2245 IDENTIFIER_LABEL_VALUE before the new label is declared. */
2246 ent = GGC_CNEW (struct named_label_entry);
2247 ent->label_decl = decl;
2249 slot = htab_find_slot (named_labels, ent, INSERT);
2250 gcc_assert (*slot == NULL);
2256 /* Look for a label named ID in the current function. If one cannot
2257 be found, create one. (We keep track of used, but undefined,
2258 labels, and complain about them at the end of a function.) */
2261 lookup_label (tree id)
2265 timevar_push (TV_NAME_LOOKUP);
2266 /* You can't use labels at global scope. */
2267 if (current_function_decl == NULL_TREE)
2269 error ("label %qE referenced outside of any function", id);
2270 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, NULL_TREE);
2273 /* See if we've already got this label. */
2274 decl = IDENTIFIER_LABEL_VALUE (id);
2275 if (decl != NULL_TREE && DECL_CONTEXT (decl) == current_function_decl)
2276 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, decl);
2278 decl = make_label_decl (id, /*local_p=*/0);
2279 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, decl);
2282 /* Declare a local label named ID. */
2285 declare_local_label (tree id)
2289 /* Add a new entry to the SHADOWED_LABELS list so that when we leave
2290 this scope we can restore the old value of IDENTIFIER_TYPE_VALUE. */
2291 shadow = tree_cons (IDENTIFIER_LABEL_VALUE (id), NULL_TREE,
2292 current_binding_level->shadowed_labels);
2293 current_binding_level->shadowed_labels = shadow;
2295 decl = make_label_decl (id, /*local_p=*/1);
2296 TREE_VALUE (shadow) = decl;
2301 /* Returns nonzero if it is ill-formed to jump past the declaration of
2302 DECL. Returns 2 if it's also a real problem. */
2305 decl_jump_unsafe (tree decl)
2307 if (TREE_CODE (decl) != VAR_DECL || TREE_STATIC (decl)
2308 || TREE_TYPE (decl) == error_mark_node)
2311 if (TYPE_NEEDS_CONSTRUCTING (TREE_TYPE (decl))
2312 || DECL_NONTRIVIALLY_INITIALIZED_P (decl))
2315 if (pod_type_p (TREE_TYPE (decl)))
2318 /* The POD stuff is just pedantry; why should it matter if the class
2319 contains a field of pointer to member type? */
2323 /* A subroutine of check_previous_goto_1 to identify a branch to the user. */
2326 identify_goto (tree decl, const location_t *locus)
2329 pedwarn ("jump to label %qD", decl);
2331 pedwarn ("jump to case label");
2333 pedwarn ("%H from here", locus);
2336 /* Check that a single previously seen jump to a newly defined label
2337 is OK. DECL is the LABEL_DECL or 0; LEVEL is the binding_level for
2338 the jump context; NAMES are the names in scope in LEVEL at the jump
2339 context; LOCUS is the source position of the jump or 0. Returns
2340 true if all is well. */
2343 check_previous_goto_1 (tree decl, struct cp_binding_level* level, tree names,
2344 bool exited_omp, const location_t *locus)
2346 struct cp_binding_level *b;
2347 bool identified = false, saw_eh = false, saw_omp = false;
2351 identify_goto (decl, locus);
2352 error (" exits OpenMP structured block");
2353 identified = saw_omp = true;
2356 for (b = current_binding_level; b ; b = b->level_chain)
2358 tree new_decls, old_decls = (b == level ? names : NULL_TREE);
2360 for (new_decls = b->names; new_decls != old_decls;
2361 new_decls = TREE_CHAIN (new_decls))
2363 int problem = decl_jump_unsafe (new_decls);
2369 identify_goto (decl, locus);
2373 error (" crosses initialization of %q+#D", new_decls);
2375 pedwarn (" enters scope of non-POD %q+#D", new_decls);
2380 if ((b->kind == sk_try || b->kind == sk_catch) && !saw_eh)
2384 identify_goto (decl, locus);
2387 if (b->kind == sk_try)
2388 error (" enters try block");
2390 error (" enters catch block");
2393 if (b->kind == sk_omp && !saw_omp)
2397 identify_goto (decl, locus);
2400 error (" enters OpenMP structured block");
2409 check_previous_goto (tree decl, struct named_label_use_entry *use)
2411 check_previous_goto_1 (decl, use->binding_level,
2412 use->names_in_scope, use->in_omp_scope,
2413 &use->o_goto_locus);
2417 check_switch_goto (struct cp_binding_level* level)
2419 return check_previous_goto_1 (NULL_TREE, level, level->names, false, NULL);
2422 /* Check that a new jump to a label DECL is OK. Called by
2423 finish_goto_stmt. */
2426 check_goto (tree decl)
2428 struct named_label_entry *ent, dummy;
2429 bool saw_catch = false, identified = false;
2432 /* We can't know where a computed goto is jumping.
2433 So we assume that it's OK. */
2434 if (TREE_CODE (decl) != LABEL_DECL)
2437 /* We didn't record any information about this label when we created it,
2438 and there's not much point since it's trivial to analyze as a return. */
2439 if (decl == cdtor_label)
2442 dummy.label_decl = decl;
2443 ent = (struct named_label_entry *) htab_find (named_labels, &dummy);
2444 gcc_assert (ent != NULL);
2446 /* If the label hasn't been defined yet, defer checking. */
2447 if (! DECL_INITIAL (decl))
2449 struct named_label_use_entry *new_use;
2451 /* Don't bother creating another use if the last goto had the
2452 same data, and will therefore create the same set of errors. */
2454 && ent->uses->names_in_scope == current_binding_level->names)
2457 new_use = GGC_NEW (struct named_label_use_entry);
2458 new_use->binding_level = current_binding_level;
2459 new_use->names_in_scope = current_binding_level->names;
2460 new_use->o_goto_locus = input_location;
2461 new_use->in_omp_scope = false;
2463 new_use->next = ent->uses;
2464 ent->uses = new_use;
2468 if (ent->in_try_scope || ent->in_catch_scope
2469 || ent->in_omp_scope || ent->bad_decls)
2471 pedwarn ("jump to label %q+D", decl);
2472 pedwarn (" from here");
2476 for (bad = ent->bad_decls; bad; bad = TREE_CHAIN (bad))
2478 tree b = TREE_VALUE (bad);
2479 int u = decl_jump_unsafe (b);
2481 if (u > 1 && DECL_ARTIFICIAL (b))
2483 /* Can't skip init of __exception_info. */
2484 error ("%J enters catch block", b);
2488 error (" skips initialization of %q+#D", b);
2490 pedwarn (" enters scope of non-POD %q+#D", b);
2493 if (ent->in_try_scope)
2494 error (" enters try block");
2495 else if (ent->in_catch_scope && !saw_catch)
2496 error (" enters catch block");
2498 if (ent->in_omp_scope)
2499 error (" enters OpenMP structured block");
2500 else if (flag_openmp)
2502 struct cp_binding_level *b;
2503 for (b = current_binding_level; b ; b = b->level_chain)
2505 if (b == ent->binding_level)
2507 if (b->kind == sk_omp)
2511 pedwarn ("jump to label %q+D", decl);
2512 pedwarn (" from here");
2515 error (" exits OpenMP structured block");
2522 /* Check that a return is ok wrt OpenMP structured blocks.
2523 Called by finish_return_stmt. Returns true if all is well. */
2526 check_omp_return (void)
2528 struct cp_binding_level *b;
2529 for (b = current_binding_level; b ; b = b->level_chain)
2530 if (b->kind == sk_omp)
2532 error ("invalid exit from OpenMP structured block");
2538 /* Define a label, specifying the location in the source file.
2539 Return the LABEL_DECL node for the label. */
2542 define_label (location_t location, tree name)
2544 struct named_label_entry *ent, dummy;
2545 struct cp_binding_level *p;
2548 timevar_push (TV_NAME_LOOKUP);
2550 decl = lookup_label (name);
2552 dummy.label_decl = decl;
2553 ent = (struct named_label_entry *) htab_find (named_labels, &dummy);
2554 gcc_assert (ent != NULL);
2556 /* After labels, make any new cleanups in the function go into their
2557 own new (temporary) binding contour. */
2558 for (p = current_binding_level;
2559 p->kind != sk_function_parms;
2561 p->more_cleanups_ok = 0;
2563 if (name == get_identifier ("wchar_t"))
2564 pedwarn ("label named wchar_t");
2566 if (DECL_INITIAL (decl) != NULL_TREE)
2568 error ("duplicate label %qD", decl);
2569 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
2573 struct named_label_use_entry *use;
2575 /* Mark label as having been defined. */
2576 DECL_INITIAL (decl) = error_mark_node;
2577 /* Say where in the source. */
2578 DECL_SOURCE_LOCATION (decl) = location;
2580 ent->binding_level = current_binding_level;
2581 ent->names_in_scope = current_binding_level->names;
2583 for (use = ent->uses; use ; use = use->next)
2584 check_previous_goto (decl, use);
2588 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, decl);
2593 struct cp_binding_level *level;
2594 struct cp_switch *next;
2595 /* The SWITCH_STMT being built. */
2597 /* A splay-tree mapping the low element of a case range to the high
2598 element, or NULL_TREE if there is no high element. Used to
2599 determine whether or not a new case label duplicates an old case
2600 label. We need a tree, rather than simply a hash table, because
2601 of the GNU case range extension. */
2605 /* A stack of the currently active switch statements. The innermost
2606 switch statement is on the top of the stack. There is no need to
2607 mark the stack for garbage collection because it is only active
2608 during the processing of the body of a function, and we never
2609 collect at that point. */
2611 static struct cp_switch *switch_stack;
2613 /* Called right after a switch-statement condition is parsed.
2614 SWITCH_STMT is the switch statement being parsed. */
2617 push_switch (tree switch_stmt)
2619 struct cp_switch *p = XNEW (struct cp_switch);
2620 p->level = current_binding_level;
2621 p->next = switch_stack;
2622 p->switch_stmt = switch_stmt;
2623 p->cases = splay_tree_new (case_compare, NULL, NULL);
2630 struct cp_switch *cs = switch_stack;
2631 location_t switch_location;
2633 /* Emit warnings as needed. */
2634 if (EXPR_HAS_LOCATION (cs->switch_stmt))
2635 switch_location = EXPR_LOCATION (cs->switch_stmt);
2637 switch_location = input_location;
2638 if (!processing_template_decl)
2639 c_do_switch_warnings (cs->cases, switch_location,
2640 SWITCH_STMT_TYPE (cs->switch_stmt),
2641 SWITCH_STMT_COND (cs->switch_stmt));
2643 splay_tree_delete (cs->cases);
2644 switch_stack = switch_stack->next;
2648 /* Note that we've seen a definition of a case label, and complain if this
2649 is a bad place for one. */
2652 finish_case_label (tree low_value, tree high_value)
2655 struct cp_binding_level *p;
2657 if (processing_template_decl)
2661 /* For templates, just add the case label; we'll do semantic
2662 analysis at instantiation-time. */
2663 label = build_decl (LABEL_DECL, NULL_TREE, NULL_TREE);
2664 return add_stmt (build_case_label (low_value, high_value, label));
2667 /* Find the condition on which this switch statement depends. */
2668 cond = SWITCH_STMT_COND (switch_stack->switch_stmt);
2669 if (cond && TREE_CODE (cond) == TREE_LIST)
2670 cond = TREE_VALUE (cond);
2672 if (!check_switch_goto (switch_stack->level))
2673 return error_mark_node;
2675 r = c_add_case_label (switch_stack->cases, cond, TREE_TYPE (cond),
2676 low_value, high_value);
2678 /* After labels, make any new cleanups in the function go into their
2679 own new (temporary) binding contour. */
2680 for (p = current_binding_level;
2681 p->kind != sk_function_parms;
2683 p->more_cleanups_ok = 0;
2688 /* Hash a TYPENAME_TYPE. K is really of type `tree'. */
2691 typename_hash (const void* k)
2696 hash = (htab_hash_pointer (TYPE_CONTEXT (t))
2697 ^ htab_hash_pointer (DECL_NAME (TYPE_NAME (t))));
2702 typedef struct typename_info {
2710 /* Compare two TYPENAME_TYPEs. K1 and K2 are really of type `tree'. */
2713 typename_compare (const void * k1, const void * k2)
2716 const typename_info *t2;
2719 t2 = (const typename_info *) k2;
2721 return (DECL_NAME (TYPE_NAME (t1)) == t2->name
2722 && TYPE_CONTEXT (t1) == t2->scope
2723 && TYPENAME_TYPE_FULLNAME (t1) == t2->template_id
2724 && TYPENAME_IS_ENUM_P (t1) == t2->enum_p
2725 && TYPENAME_IS_CLASS_P (t1) == t2->class_p);
2728 /* Build a TYPENAME_TYPE. If the type is `typename T::t', CONTEXT is
2729 the type of `T', NAME is the IDENTIFIER_NODE for `t'.
2731 Returns the new TYPENAME_TYPE. */
2733 static GTY ((param_is (union tree_node))) htab_t typename_htab;
2736 build_typename_type (tree context, tree name, tree fullname,
2737 enum tag_types tag_type)
2745 if (typename_htab == NULL)
2746 typename_htab = htab_create_ggc (61, &typename_hash,
2747 &typename_compare, NULL);
2749 ti.scope = FROB_CONTEXT (context);
2751 ti.template_id = fullname;
2752 ti.enum_p = tag_type == enum_type;
2753 ti.class_p = (tag_type == class_type
2754 || tag_type == record_type
2755 || tag_type == union_type);
2756 hash = (htab_hash_pointer (ti.scope)
2757 ^ htab_hash_pointer (ti.name));
2759 /* See if we already have this type. */
2760 e = htab_find_slot_with_hash (typename_htab, &ti, hash, INSERT);
2765 /* Build the TYPENAME_TYPE. */
2766 t = make_aggr_type (TYPENAME_TYPE);
2767 TYPE_CONTEXT (t) = ti.scope;
2768 TYPENAME_TYPE_FULLNAME (t) = ti.template_id;
2769 TYPENAME_IS_ENUM_P (t) = ti.enum_p;
2770 TYPENAME_IS_CLASS_P (t) = ti.class_p;
2772 /* Build the corresponding TYPE_DECL. */
2773 d = build_decl (TYPE_DECL, name, t);
2774 TYPE_NAME (TREE_TYPE (d)) = d;
2775 TYPE_STUB_DECL (TREE_TYPE (d)) = d;
2776 DECL_CONTEXT (d) = FROB_CONTEXT (context);
2777 DECL_ARTIFICIAL (d) = 1;
2779 /* Store it in the hash table. */
2786 /* Resolve `typename CONTEXT::NAME'. TAG_TYPE indicates the tag
2787 provided to name the type. Returns an appropriate type, unless an
2788 error occurs, in which case error_mark_node is returned. If we
2789 locate a non-artificial TYPE_DECL and TF_KEEP_TYPE_DECL is set, we
2790 return that, rather than the _TYPE it corresponds to, in other
2791 cases we look through the type decl. If TF_ERROR is set, complain
2792 about errors, otherwise be quiet. */
2795 make_typename_type (tree context, tree name, enum tag_types tag_type,
2796 tsubst_flags_t complain)
2802 if (name == error_mark_node
2803 || context == NULL_TREE
2804 || context == error_mark_node)
2805 return error_mark_node;
2809 if (!(TYPE_LANG_SPECIFIC (name)
2810 && (CLASSTYPE_IS_TEMPLATE (name)
2811 || CLASSTYPE_USE_TEMPLATE (name))))
2812 name = TYPE_IDENTIFIER (name);
2814 /* Create a TEMPLATE_ID_EXPR for the type. */
2815 name = build_nt (TEMPLATE_ID_EXPR,
2816 CLASSTYPE_TI_TEMPLATE (name),
2817 CLASSTYPE_TI_ARGS (name));
2819 else if (TREE_CODE (name) == TYPE_DECL)
2820 name = DECL_NAME (name);
2824 if (TREE_CODE (name) == TEMPLATE_ID_EXPR)
2826 name = TREE_OPERAND (name, 0);
2827 if (TREE_CODE (name) == TEMPLATE_DECL)
2828 name = TREE_OPERAND (fullname, 0) = DECL_NAME (name);
2829 else if (TREE_CODE (name) == OVERLOAD)
2831 error ("%qD is not a type", name);
2832 return error_mark_node;
2835 if (TREE_CODE (name) == TEMPLATE_DECL)
2837 error ("%qD used without template parameters", name);
2838 return error_mark_node;
2840 gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE);
2841 gcc_assert (TYPE_P (context));
2843 /* When the CONTEXT is a dependent type, NAME could refer to a
2844 dependent base class of CONTEXT. So we cannot peek inside it,
2845 even if CONTEXT is a currently open scope. */
2846 if (dependent_type_p (context))
2847 return build_typename_type (context, name, fullname, tag_type);
2849 if (!IS_AGGR_TYPE (context))
2851 if (complain & tf_error)
2852 error ("%q#T is not a class", context);
2853 return error_mark_node;
2856 want_template = TREE_CODE (fullname) == TEMPLATE_ID_EXPR;
2858 /* We should only set WANT_TYPE when we're a nested typename type.
2859 Then we can give better diagnostics if we find a non-type. */
2860 t = lookup_field (context, name, 0, /*want_type=*/true);
2863 if (complain & tf_error)
2864 error (want_template ? "no class template named %q#T in %q#T"
2865 : "no type named %q#T in %q#T", name, context);
2866 return error_mark_node;
2869 if (want_template && !DECL_CLASS_TEMPLATE_P (t))
2871 if (complain & tf_error)
2872 error ("%<typename %T::%D%> names %q#T, which is not a class template",
2874 return error_mark_node;
2876 if (!want_template && TREE_CODE (t) != TYPE_DECL)
2878 if (complain & tf_error)
2879 error ("%<typename %T::%D%> names %q#T, which is not a type",
2881 return error_mark_node;
2884 if (complain & tf_error)
2885 perform_or_defer_access_check (TYPE_BINFO (context), t, t);
2888 return lookup_template_class (t, TREE_OPERAND (fullname, 1),
2890 /*entering_scope=*/0,
2891 tf_warning_or_error | tf_user);
2893 if (DECL_ARTIFICIAL (t) || !(complain & tf_keep_type_decl))
2899 /* Resolve `CONTEXT::template NAME'. Returns a TEMPLATE_DECL if the name
2900 can be resolved or an UNBOUND_CLASS_TEMPLATE, unless an error occurs,
2901 in which case error_mark_node is returned.
2903 If PARM_LIST is non-NULL, also make sure that the template parameter
2904 list of TEMPLATE_DECL matches.
2906 If COMPLAIN zero, don't complain about any errors that occur. */
2909 make_unbound_class_template (tree context, tree name, tree parm_list,
2910 tsubst_flags_t complain)
2916 name = TYPE_IDENTIFIER (name);
2917 else if (DECL_P (name))
2918 name = DECL_NAME (name);
2919 gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE);
2921 if (!dependent_type_p (context)
2922 || currently_open_class (context))
2924 tree tmpl = NULL_TREE;
2926 if (IS_AGGR_TYPE (context))
2927 tmpl = lookup_field (context, name, 0, false);
2929 if (!tmpl || !DECL_CLASS_TEMPLATE_P (tmpl))
2931 if (complain & tf_error)
2932 error ("no class template named %q#T in %q#T", name, context);
2933 return error_mark_node;
2937 && !comp_template_parms (DECL_TEMPLATE_PARMS (tmpl), parm_list))
2939 if (complain & tf_error)
2941 error ("template parameters do not match template");
2942 error ("%q+D declared here", tmpl);
2944 return error_mark_node;
2947 if (complain & tf_error)
2948 perform_or_defer_access_check (TYPE_BINFO (context), tmpl, tmpl);
2953 /* Build the UNBOUND_CLASS_TEMPLATE. */
2954 t = make_aggr_type (UNBOUND_CLASS_TEMPLATE);
2955 TYPE_CONTEXT (t) = FROB_CONTEXT (context);
2956 TREE_TYPE (t) = NULL_TREE;
2958 /* Build the corresponding TEMPLATE_DECL. */
2959 d = build_decl (TEMPLATE_DECL, name, t);
2960 TYPE_NAME (TREE_TYPE (d)) = d;
2961 TYPE_STUB_DECL (TREE_TYPE (d)) = d;
2962 DECL_CONTEXT (d) = FROB_CONTEXT (context);
2963 DECL_ARTIFICIAL (d) = 1;
2964 DECL_TEMPLATE_PARMS (d) = parm_list;
2971 /* Push the declarations of builtin types into the namespace.
2972 RID_INDEX is the index of the builtin type in the array
2973 RID_POINTERS. NAME is the name used when looking up the builtin
2974 type. TYPE is the _TYPE node for the builtin type. */
2977 record_builtin_type (enum rid rid_index,
2981 tree rname = NULL_TREE, tname = NULL_TREE;
2982 tree tdecl = NULL_TREE;
2984 if ((int) rid_index < (int) RID_MAX)
2985 rname = ridpointers[(int) rid_index];
2987 tname = get_identifier (name);
2989 /* The calls to SET_IDENTIFIER_GLOBAL_VALUE below should be
2990 eliminated. Built-in types should not be looked up name; their
2991 names are keywords that the parser can recognize. However, there
2992 is code in c-common.c that uses identifier_global_value to look
2993 up built-in types by name. */
2996 tdecl = build_decl (TYPE_DECL, tname, type);
2997 DECL_ARTIFICIAL (tdecl) = 1;
2998 SET_IDENTIFIER_GLOBAL_VALUE (tname, tdecl);
3004 tdecl = build_decl (TYPE_DECL, rname, type);
3005 DECL_ARTIFICIAL (tdecl) = 1;
3007 SET_IDENTIFIER_GLOBAL_VALUE (rname, tdecl);
3010 if (!TYPE_NAME (type))
3011 TYPE_NAME (type) = tdecl;
3014 debug_hooks->type_decl (tdecl, 0);
3017 /* Record one of the standard Java types.
3018 * Declare it as having the given NAME.
3019 * If SIZE > 0, it is the size of one of the integral types;
3020 * otherwise it is the negative of the size of one of the other types. */
3023 record_builtin_java_type (const char* name, int size)
3027 type = make_signed_type (size);
3028 else if (size > -32)
3029 { /* "__java_char" or ""__java_boolean". */
3030 type = make_unsigned_type (-size);
3031 /*if (size == -1) TREE_SET_CODE (type, BOOLEAN_TYPE);*/
3034 { /* "__java_float" or ""__java_double". */
3035 type = make_node (REAL_TYPE);
3036 TYPE_PRECISION (type) = - size;
3039 record_builtin_type (RID_MAX, name, type);
3040 decl = TYPE_NAME (type);
3042 /* Suppress generate debug symbol entries for these types,
3043 since for normal C++ they are just clutter.
3044 However, push_lang_context undoes this if extern "Java" is seen. */
3045 DECL_IGNORED_P (decl) = 1;
3047 TYPE_FOR_JAVA (type) = 1;
3051 /* Push a type into the namespace so that the back-ends ignore it. */
3054 record_unknown_type (tree type, const char* name)
3056 tree decl = pushdecl (build_decl (TYPE_DECL, get_identifier (name), type));
3057 /* Make sure the "unknown type" typedecl gets ignored for debug info. */
3058 DECL_IGNORED_P (decl) = 1;
3059 TYPE_DECL_SUPPRESS_DEBUG (decl) = 1;
3060 TYPE_SIZE (type) = TYPE_SIZE (void_type_node);
3061 TYPE_ALIGN (type) = 1;
3062 TYPE_USER_ALIGN (type) = 0;
3063 TYPE_MODE (type) = TYPE_MODE (void_type_node);
3066 /* A string for which we should create an IDENTIFIER_NODE at
3069 typedef struct predefined_identifier
3071 /* The name of the identifier. */
3072 const char *const name;
3073 /* The place where the IDENTIFIER_NODE should be stored. */
3075 /* Nonzero if this is the name of a constructor or destructor. */
3076 const int ctor_or_dtor_p;
3077 } predefined_identifier;
3079 /* Create all the predefined identifiers. */
3082 initialize_predefined_identifiers (void)
3084 const predefined_identifier *pid;
3086 /* A table of identifiers to create at startup. */
3087 static const predefined_identifier predefined_identifiers[] = {
3088 { "C++", &lang_name_cplusplus, 0 },
3089 { "C", &lang_name_c, 0 },
3090 { "Java", &lang_name_java, 0 },
3091 /* Some of these names have a trailing space so that it is
3092 impossible for them to conflict with names written by users. */
3093 { "__ct ", &ctor_identifier, 1 },
3094 { "__base_ctor ", &base_ctor_identifier, 1 },
3095 { "__comp_ctor ", &complete_ctor_identifier, 1 },
3096 { "__dt ", &dtor_identifier, 1 },
3097 { "__comp_dtor ", &complete_dtor_identifier, 1 },
3098 { "__base_dtor ", &base_dtor_identifier, 1 },
3099 { "__deleting_dtor ", &deleting_dtor_identifier, 1 },
3100 { IN_CHARGE_NAME, &in_charge_identifier, 0 },
3101 { "nelts", &nelts_identifier, 0 },
3102 { THIS_NAME, &this_identifier, 0 },
3103 { VTABLE_DELTA_NAME, &delta_identifier, 0 },
3104 { VTABLE_PFN_NAME, &pfn_identifier, 0 },
3105 { "_vptr", &vptr_identifier, 0 },
3106 { "__vtt_parm", &vtt_parm_identifier, 0 },
3107 { "::", &global_scope_name, 0 },
3108 { "std", &std_identifier, 0 },
3112 for (pid = predefined_identifiers; pid->name; ++pid)
3114 *pid->node = get_identifier (pid->name);
3115 if (pid->ctor_or_dtor_p)
3116 IDENTIFIER_CTOR_OR_DTOR_P (*pid->node) = 1;
3120 /* Create the predefined scalar types of C,
3121 and some nodes representing standard constants (0, 1, (void *)0).
3122 Initialize the global binding level.
3123 Make definitions for built-in primitive functions. */
3126 cxx_init_decl_processing (void)
3129 tree void_ftype_ptr;
3131 build_common_tree_nodes (flag_signed_char, false);
3133 /* Create all the identifiers we need. */
3134 initialize_predefined_identifiers ();
3136 /* Create the global variables. */
3137 push_to_top_level ();
3139 current_function_decl = NULL_TREE;
3140 current_binding_level = NULL;
3141 /* Enter the global namespace. */
3142 gcc_assert (global_namespace == NULL_TREE);
3143 global_namespace = build_lang_decl (NAMESPACE_DECL, global_scope_name,
3145 TREE_PUBLIC (global_namespace) = 1;
3146 begin_scope (sk_namespace, global_namespace);
3148 current_lang_name = NULL_TREE;
3150 /* Adjust various flags based on command-line settings. */
3151 if (!flag_permissive)
3152 flag_pedantic_errors = 1;
3153 if (!flag_no_inline)
3155 flag_inline_trees = 1;
3158 if (flag_inline_functions)
3159 flag_inline_trees = 2;
3161 /* Force minimum function alignment if using the least significant
3162 bit of function pointers to store the virtual bit. */
3163 if (TARGET_PTRMEMFUNC_VBIT_LOCATION == ptrmemfunc_vbit_in_pfn
3164 && force_align_functions_log < 1)
3165 force_align_functions_log = 1;
3168 current_lang_name = lang_name_c;
3170 /* Create the `std' namespace. */
3171 push_namespace (std_identifier);
3172 std_node = current_namespace;
3175 c_common_nodes_and_builtins ();
3177 java_byte_type_node = record_builtin_java_type ("__java_byte", 8);
3178 java_short_type_node = record_builtin_java_type ("__java_short", 16);
3179 java_int_type_node = record_builtin_java_type ("__java_int", 32);
3180 java_long_type_node = record_builtin_java_type ("__java_long", 64);
3181 java_float_type_node = record_builtin_java_type ("__java_float", -32);
3182 java_double_type_node = record_builtin_java_type ("__java_double", -64);
3183 java_char_type_node = record_builtin_java_type ("__java_char", -16);
3184 java_boolean_type_node = record_builtin_java_type ("__java_boolean", -1);
3186 integer_two_node = build_int_cst (NULL_TREE, 2);
3187 integer_three_node = build_int_cst (NULL_TREE, 3);
3189 record_builtin_type (RID_BOOL, "bool", boolean_type_node);
3190 truthvalue_type_node = boolean_type_node;
3191 truthvalue_false_node = boolean_false_node;
3192 truthvalue_true_node = boolean_true_node;
3194 empty_except_spec = build_tree_list (NULL_TREE, NULL_TREE);
3197 record_builtin_type (RID_MAX, NULL, string_type_node);
3200 delta_type_node = ptrdiff_type_node;
3201 vtable_index_type = ptrdiff_type_node;
3203 vtt_parm_type = build_pointer_type (const_ptr_type_node);
3204 void_ftype = build_function_type (void_type_node, void_list_node);
3205 void_ftype_ptr = build_function_type (void_type_node,
3206 tree_cons (NULL_TREE,
3210 = build_exception_variant (void_ftype_ptr, empty_except_spec);
3212 /* C++ extensions */
3214 unknown_type_node = make_node (UNKNOWN_TYPE);
3215 record_unknown_type (unknown_type_node, "unknown type");
3217 /* Indirecting an UNKNOWN_TYPE node yields an UNKNOWN_TYPE node. */
3218 TREE_TYPE (unknown_type_node) = unknown_type_node;
3220 /* Looking up TYPE_POINTER_TO and TYPE_REFERENCE_TO yield the same
3222 TYPE_POINTER_TO (unknown_type_node) = unknown_type_node;
3223 TYPE_REFERENCE_TO (unknown_type_node) = unknown_type_node;
3226 /* Make sure we get a unique function type, so we can give
3227 its pointer type a name. (This wins for gdb.) */
3228 tree vfunc_type = make_node (FUNCTION_TYPE);
3229 TREE_TYPE (vfunc_type) = integer_type_node;
3230 TYPE_ARG_TYPES (vfunc_type) = NULL_TREE;
3231 layout_type (vfunc_type);
3233 vtable_entry_type = build_pointer_type (vfunc_type);
3235 record_builtin_type (RID_MAX, VTBL_PTR_TYPE, vtable_entry_type);
3238 = build_cplus_array_type (vtable_entry_type, NULL_TREE);
3239 layout_type (vtbl_type_node);
3240 vtbl_type_node = build_qualified_type (vtbl_type_node, TYPE_QUAL_CONST);
3241 record_builtin_type (RID_MAX, NULL, vtbl_type_node);
3242 vtbl_ptr_type_node = build_pointer_type (vtable_entry_type);
3243 layout_type (vtbl_ptr_type_node);
3244 record_builtin_type (RID_MAX, NULL, vtbl_ptr_type_node);
3246 push_namespace (get_identifier ("__cxxabiv1"));
3247 abi_node = current_namespace;
3250 global_type_node = make_node (LANG_TYPE);
3251 record_unknown_type (global_type_node, "global type");
3254 current_lang_name = lang_name_cplusplus;
3258 tree bad_alloc_type_node;
3259 tree bad_alloc_decl;
3260 tree newtype, deltype;
3261 tree ptr_ftype_sizetype;
3263 push_namespace (std_identifier);
3264 bad_alloc_id = get_identifier ("bad_alloc");
3265 bad_alloc_type_node = make_aggr_type (RECORD_TYPE);
3266 TYPE_CONTEXT (bad_alloc_type_node) = current_namespace;
3268 = create_implicit_typedef (bad_alloc_id, bad_alloc_type_node);
3269 DECL_CONTEXT (bad_alloc_decl) = current_namespace;
3270 TYPE_STUB_DECL (bad_alloc_type_node) = bad_alloc_decl;
3274 = build_function_type (ptr_type_node,
3275 tree_cons (NULL_TREE,
3278 newtype = build_exception_variant
3279 (ptr_ftype_sizetype, add_exception_specifier
3280 (NULL_TREE, bad_alloc_type_node, -1));
3281 deltype = build_exception_variant (void_ftype_ptr, empty_except_spec);
3282 push_cp_library_fn (NEW_EXPR, newtype);
3283 push_cp_library_fn (VEC_NEW_EXPR, newtype);
3284 global_delete_fndecl = push_cp_library_fn (DELETE_EXPR, deltype);
3285 push_cp_library_fn (VEC_DELETE_EXPR, deltype);
3289 = build_library_fn_ptr ("__cxa_pure_virtual", void_ftype);
3291 /* Perform other language dependent initializations. */
3292 init_class_processing ();
3293 init_rtti_processing ();
3295 if (flag_exceptions)
3296 init_exception_processing ();
3298 if (! supports_one_only ())
3301 make_fname_decl = cp_make_fname_decl;
3302 start_fname_decls ();
3304 /* Show we use EH for cleanups. */
3305 if (flag_exceptions)
3306 using_eh_for_cleanups ();
3309 /* Generate an initializer for a function naming variable from
3310 NAME. NAME may be NULL, to indicate a dependent name. TYPE_P is
3311 filled in with the type of the init. */
3314 cp_fname_init (const char* name, tree *type_p)
3316 tree domain = NULL_TREE;
3318 tree init = NULL_TREE;
3323 length = strlen (name);
3324 domain = build_index_type (size_int (length));
3325 init = build_string (length + 1, name);
3328 type = build_qualified_type (char_type_node, TYPE_QUAL_CONST);
3329 type = build_cplus_array_type (type, domain);
3334 TREE_TYPE (init) = type;
3336 init = error_mark_node;
3341 /* Create the VAR_DECL for __FUNCTION__ etc. ID is the name to give the
3342 decl, NAME is the initialization string and TYPE_DEP indicates whether
3343 NAME depended on the type of the function. We make use of that to detect
3344 __PRETTY_FUNCTION__ inside a template fn. This is being done
3345 lazily at the point of first use, so we mustn't push the decl now. */
3348 cp_make_fname_decl (tree id, int type_dep)
3350 const char *const name = (type_dep && processing_template_decl
3351 ? NULL : fname_as_string (type_dep));
3353 tree init = cp_fname_init (name, &type);
3354 tree decl = build_decl (VAR_DECL, id, type);
3357 free ((char *) name);
3359 /* As we're using pushdecl_with_scope, we must set the context. */
3360 DECL_CONTEXT (decl) = current_function_decl;
3361 DECL_PRETTY_FUNCTION_P (decl) = type_dep;
3363 TREE_STATIC (decl) = 1;
3364 TREE_READONLY (decl) = 1;
3365 DECL_ARTIFICIAL (decl) = 1;
3367 TREE_USED (decl) = 1;
3369 if (current_function_decl)
3371 struct cp_binding_level *b = current_binding_level;
3372 while (b->level_chain->kind != sk_function_parms)
3374 pushdecl_with_scope (decl, b, /*is_friend=*/false);
3375 cp_finish_decl (decl, init, /*init_const_expr_p=*/false, NULL_TREE,
3376 LOOKUP_ONLYCONVERTING);
3379 pushdecl_top_level_and_finish (decl, init);
3384 /* Make a definition for a builtin function named NAME in the current
3385 namespace, whose data type is TYPE and whose context is CONTEXT.
3386 TYPE should be a function type with argument types.
3388 CLASS and CODE tell later passes how to compile calls to this function.
3389 See tree.h for possible values.
3391 If LIBNAME is nonzero, use that for DECL_ASSEMBLER_NAME,
3392 the name to be called if we can't opencode the function.
3393 If ATTRS is nonzero, use that for the function's attribute
3397 builtin_function_1 (const char* name,
3400 enum built_in_function code,
3401 enum built_in_class class,
3402 const char* libname,
3405 tree decl = build_library_fn_1 (get_identifier (name), ERROR_MARK, type);
3406 DECL_BUILT_IN_CLASS (decl) = class;
3407 DECL_FUNCTION_CODE (decl) = code;
3408 DECL_CONTEXT (decl) = context;
3412 /* Since `pushdecl' relies on DECL_ASSEMBLER_NAME instead of DECL_NAME,
3413 we cannot change DECL_ASSEMBLER_NAME until we have installed this
3414 function in the namespace. */
3416 SET_DECL_ASSEMBLER_NAME (decl, get_identifier (libname));
3418 /* A function in the user's namespace should have an explicit
3419 declaration before it is used. Mark the built-in function as
3420 anticipated but not actually declared. */
3421 if (name[0] != '_' || name[1] != '_')
3422 DECL_ANTICIPATED (decl) = 1;
3424 /* Possibly apply some default attributes to this built-in function. */
3426 decl_attributes (&decl, attrs, ATTR_FLAG_BUILT_IN);
3428 decl_attributes (&decl, NULL_TREE, 0);
3433 /* Entry point for the benefit of c_common_nodes_and_builtins.
3435 Make a definition for a builtin function named NAME and whose data type
3436 is TYPE. TYPE should be a function type with argument types. This
3437 function places the anticipated declaration in the global namespace
3438 and additionally in the std namespace if appropriate.
3440 CLASS and CODE tell later passes how to compile calls to this function.
3441 See tree.h for possible values.
3443 If LIBNAME is nonzero, use that for DECL_ASSEMBLER_NAME,
3444 the name to be called if we can't opencode the function.
3446 If ATTRS is nonzero, use that for the function's attribute
3450 builtin_function (const char* name,
3453 enum built_in_class cl,
3454 const char* libname,
3457 /* All builtins that don't begin with an '_' should additionally
3458 go in the 'std' namespace. */
3461 push_namespace (std_identifier);
3462 builtin_function_1 (name, type, std_node, code, cl, libname, attrs);
3466 return builtin_function_1 (name, type, NULL_TREE, code,
3467 cl, libname, attrs);
3470 /* Generate a FUNCTION_DECL with the typical flags for a runtime library
3471 function. Not called directly. */
3474 build_library_fn_1 (tree name, enum tree_code operator_code, tree type)
3476 tree fn = build_lang_decl (FUNCTION_DECL, name, type);
3477 DECL_EXTERNAL (fn) = 1;
3478 TREE_PUBLIC (fn) = 1;
3479 DECL_ARTIFICIAL (fn) = 1;
3480 SET_OVERLOADED_OPERATOR_CODE (fn, operator_code);
3481 SET_DECL_LANGUAGE (fn, lang_c);
3482 /* Runtime library routines are, by definition, available in an
3483 external shared object. */
3484 DECL_VISIBILITY (fn) = VISIBILITY_DEFAULT;
3485 DECL_VISIBILITY_SPECIFIED (fn) = 1;
3489 /* Returns the _DECL for a library function with C linkage.
3490 We assume that such functions never throw; if this is incorrect,
3491 callers should unset TREE_NOTHROW. */
3494 build_library_fn (tree name, tree type)
3496 tree fn = build_library_fn_1 (name, ERROR_MARK, type);
3497 TREE_NOTHROW (fn) = 1;
3501 /* Returns the _DECL for a library function with C++ linkage. */
3504 build_cp_library_fn (tree name, enum tree_code operator_code, tree type)
3506 tree fn = build_library_fn_1 (name, operator_code, type);
3507 TREE_NOTHROW (fn) = TYPE_NOTHROW_P (type);
3508 DECL_CONTEXT (fn) = FROB_CONTEXT (current_namespace);
3509 SET_DECL_LANGUAGE (fn, lang_cplusplus);
3513 /* Like build_library_fn, but takes a C string instead of an
3517 build_library_fn_ptr (const char* name, tree type)
3519 return build_library_fn (get_identifier (name), type);
3522 /* Like build_cp_library_fn, but takes a C string instead of an
3526 build_cp_library_fn_ptr (const char* name, tree type)
3528 return build_cp_library_fn (get_identifier (name), ERROR_MARK, type);
3531 /* Like build_library_fn, but also pushes the function so that we will
3532 be able to find it via IDENTIFIER_GLOBAL_VALUE. */
3535 push_library_fn (tree name, tree type)
3537 tree fn = build_library_fn (name, type);
3538 pushdecl_top_level (fn);
3542 /* Like build_cp_library_fn, but also pushes the function so that it
3543 will be found by normal lookup. */
3546 push_cp_library_fn (enum tree_code operator_code, tree type)
3548 tree fn = build_cp_library_fn (ansi_opname (operator_code),
3555 /* Like push_library_fn, but takes a TREE_LIST of parm types rather than
3559 push_void_library_fn (tree name, tree parmtypes)
3561 tree type = build_function_type (void_type_node, parmtypes);
3562 return push_library_fn (name, type);
3565 /* Like push_library_fn, but also note that this function throws
3566 and does not return. Used for __throw_foo and the like. */
3569 push_throw_library_fn (tree name, tree type)
3571 tree fn = push_library_fn (name, type);
3572 TREE_THIS_VOLATILE (fn) = 1;
3573 TREE_NOTHROW (fn) = 0;
3577 /* When we call finish_struct for an anonymous union, we create
3578 default copy constructors and such. But, an anonymous union
3579 shouldn't have such things; this function undoes the damage to the
3580 anonymous union type T.
3582 (The reason that we create the synthesized methods is that we don't
3583 distinguish `union { int i; }' from `typedef union { int i; } U'.
3584 The first is an anonymous union; the second is just an ordinary
3588 fixup_anonymous_aggr (tree t)
3592 /* Wipe out memory of synthesized methods. */
3593 TYPE_HAS_CONSTRUCTOR (t) = 0;
3594 TYPE_HAS_DEFAULT_CONSTRUCTOR (t) = 0;
3595 TYPE_HAS_INIT_REF (t) = 0;
3596 TYPE_HAS_CONST_INIT_REF (t) = 0;
3597 TYPE_HAS_ASSIGN_REF (t) = 0;
3598 TYPE_HAS_CONST_ASSIGN_REF (t) = 0;
3600 /* Splice the implicitly generated functions out of the TYPE_METHODS
3602 q = &TYPE_METHODS (t);
3605 if (DECL_ARTIFICIAL (*q))
3606 *q = TREE_CHAIN (*q);
3608 q = &TREE_CHAIN (*q);
3611 /* ISO C++ 9.5.3. Anonymous unions may not have function members. */
3612 if (TYPE_METHODS (t))
3613 error ("%Jan anonymous union cannot have function members",
3614 TYPE_MAIN_DECL (t));
3616 /* Anonymous aggregates cannot have fields with ctors, dtors or complex
3617 assignment operators (because they cannot have these methods themselves).
3618 For anonymous unions this is already checked because they are not allowed
3619 in any union, otherwise we have to check it. */
3620 if (TREE_CODE (t) != UNION_TYPE)
3624 for (field = TYPE_FIELDS (t); field; field = TREE_CHAIN (field))
3625 if (TREE_CODE (field) == FIELD_DECL)
3627 type = TREE_TYPE (field);
3628 if (CLASS_TYPE_P (type))
3630 if (TYPE_NEEDS_CONSTRUCTING (type))
3631 error ("member %q+#D with constructor not allowed "
3632 "in anonymous aggregate", field);
3633 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type))
3634 error ("member %q+#D with destructor not allowed "
3635 "in anonymous aggregate", field);
3636 if (TYPE_HAS_COMPLEX_ASSIGN_REF (type))
3637 error ("member %q+#D with copy assignment operator "
3638 "not allowed in anonymous aggregate", field);
3644 /* Make sure that a declaration with no declarator is well-formed, i.e.
3645 just declares a tagged type or anonymous union.
3647 Returns the type declared; or NULL_TREE if none. */
3650 check_tag_decl (cp_decl_specifier_seq *declspecs)
3652 int saw_friend = declspecs->specs[(int)ds_friend] != 0;
3653 int saw_typedef = declspecs->specs[(int)ds_typedef] != 0;
3654 /* If a class, struct, or enum type is declared by the DECLSPECS
3655 (i.e, if a class-specifier, enum-specifier, or non-typename
3656 elaborated-type-specifier appears in the DECLSPECS),
3657 DECLARED_TYPE is set to the corresponding type. */
3658 tree declared_type = NULL_TREE;
3659 bool error_p = false;
3661 if (declspecs->multiple_types_p)
3662 error ("multiple types in one declaration");
3663 else if (declspecs->redefined_builtin_type)
3665 if (!in_system_header)
3666 pedwarn ("redeclaration of C++ built-in type %qT",
3667 declspecs->redefined_builtin_type);
3672 && TYPE_P (declspecs->type)
3673 && ((TREE_CODE (declspecs->type) != TYPENAME_TYPE
3674 && IS_AGGR_TYPE (declspecs->type))
3675 || TREE_CODE (declspecs->type) == ENUMERAL_TYPE))
3676 declared_type = declspecs->type;
3677 else if (declspecs->type == error_mark_node)
3679 if (declared_type == NULL_TREE && ! saw_friend && !error_p)
3680 pedwarn ("declaration does not declare anything");
3681 /* Check for an anonymous union. */
3682 else if (declared_type && IS_AGGR_TYPE_CODE (TREE_CODE (declared_type))
3683 && TYPE_ANONYMOUS_P (declared_type))
3685 /* 7/3 In a simple-declaration, the optional init-declarator-list
3686 can be omitted only when declaring a class (clause 9) or
3687 enumeration (7.2), that is, when the decl-specifier-seq contains
3688 either a class-specifier, an elaborated-type-specifier with
3689 a class-key (9.1), or an enum-specifier. In these cases and
3690 whenever a class-specifier or enum-specifier is present in the
3691 decl-specifier-seq, the identifiers in these specifiers are among
3692 the names being declared by the declaration (as class-name,
3693 enum-names, or enumerators, depending on the syntax). In such
3694 cases, and except for the declaration of an unnamed bit-field (9.6),
3695 the decl-specifier-seq shall introduce one or more names into the
3696 program, or shall redeclare a name introduced by a previous
3697 declaration. [Example:
3698 enum { }; // ill-formed
3699 typedef class { }; // ill-formed
3703 error ("missing type-name in typedef-declaration");
3706 /* Anonymous unions are objects, so they can have specifiers. */;
3707 SET_ANON_AGGR_TYPE_P (declared_type);
3709 if (TREE_CODE (declared_type) != UNION_TYPE && pedantic
3710 && !in_system_header)
3711 pedwarn ("ISO C++ prohibits anonymous structs");
3716 if (declspecs->specs[(int)ds_inline]
3717 || declspecs->specs[(int)ds_virtual])
3718 error ("%qs can only be specified for functions",
3719 declspecs->specs[(int)ds_inline]
3720 ? "inline" : "virtual");
3722 && (!current_class_type
3723 || current_scope () != current_class_type))
3724 error ("%<friend%> can only be specified inside a class");
3725 else if (declspecs->specs[(int)ds_explicit])
3726 error ("%<explicit%> can only be specified for constructors");
3727 else if (declspecs->storage_class)
3728 error ("a storage class can only be specified for objects "
3730 else if (declspecs->specs[(int)ds_const]
3731 || declspecs->specs[(int)ds_volatile]
3732 || declspecs->specs[(int)ds_restrict]
3733 || declspecs->specs[(int)ds_thread])
3734 error ("qualifiers can only be specified for objects "
3738 return declared_type;
3741 /* Called when a declaration is seen that contains no names to declare.
3742 If its type is a reference to a structure, union or enum inherited
3743 from a containing scope, shadow that tag name for the current scope
3744 with a forward reference.
3745 If its type defines a new named structure or union
3746 or defines an enum, it is valid but we need not do anything here.
3747 Otherwise, it is an error.
3749 C++: may have to grok the declspecs to learn about static,
3750 complain for anonymous unions.
3752 Returns the TYPE declared -- or NULL_TREE if none. */
3755 shadow_tag (cp_decl_specifier_seq *declspecs)
3757 tree t = check_tag_decl (declspecs);
3762 if (declspecs->attributes)
3764 warning (0, "attribute ignored in declaration of %q+#T", t);
3765 warning (0, "attribute for %q+#T must follow the %qs keyword",
3766 t, class_key_or_enum_as_string (t));
3770 if (maybe_process_partial_specialization (t) == error_mark_node)
3773 /* This is where the variables in an anonymous union are
3774 declared. An anonymous union declaration looks like:
3776 because there is no declarator after the union, the parser
3777 sends that declaration here. */
3778 if (ANON_AGGR_TYPE_P (t))
3780 fixup_anonymous_aggr (t);
3782 if (TYPE_FIELDS (t))
3784 tree decl = grokdeclarator (/*declarator=*/NULL,
3785 declspecs, NORMAL, 0, NULL);
3786 finish_anon_union (decl);
3793 /* Decode a "typename", such as "int **", returning a ..._TYPE node. */
3796 groktypename (cp_decl_specifier_seq *type_specifiers,
3797 const cp_declarator *declarator)
3801 attrs = type_specifiers->attributes;
3802 type_specifiers->attributes = NULL_TREE;
3803 type = grokdeclarator (declarator, type_specifiers, TYPENAME, 0, &attrs);
3805 cplus_decl_attributes (&type, attrs, 0);
3809 /* Decode a declarator in an ordinary declaration or data definition.
3810 This is called as soon as the type information and variable name
3811 have been parsed, before parsing the initializer if any.
3812 Here we create the ..._DECL node, fill in its type,
3813 and put it on the list of decls for the current context.
3814 The ..._DECL node is returned as the value.
3816 Exception: for arrays where the length is not specified,
3817 the type is left null, to be filled in by `cp_finish_decl'.
3819 Function definitions do not come here; they go to start_function
3820 instead. However, external and forward declarations of functions
3821 do go through here. Structure field declarations are done by
3822 grokfield and not through here. */
3825 start_decl (const cp_declarator *declarator,
3826 cp_decl_specifier_seq *declspecs,
3829 tree prefix_attributes,
3830 tree *pushed_scope_p)
3837 *pushed_scope_p = NULL_TREE;
3839 /* An object declared as __attribute__((deprecated)) suppresses
3840 warnings of uses of other deprecated items. */
3841 if (lookup_attribute ("deprecated", attributes))
3842 deprecated_state = DEPRECATED_SUPPRESS;
3844 attributes = chainon (attributes, prefix_attributes);
3846 decl = grokdeclarator (declarator, declspecs, NORMAL, initialized,
3849 deprecated_state = DEPRECATED_NORMAL;
3851 if (decl == NULL_TREE || TREE_CODE (decl) == VOID_TYPE
3852 || decl == error_mark_node)
3853 return error_mark_node;
3855 type = TREE_TYPE (decl);
3857 context = DECL_CONTEXT (decl);
3861 *pushed_scope_p = push_scope (context);
3863 /* We are only interested in class contexts, later. */
3864 if (TREE_CODE (context) == NAMESPACE_DECL)
3865 context = NULL_TREE;
3869 /* Is it valid for this decl to have an initializer at all?
3870 If not, set INITIALIZED to zero, which will indirectly
3871 tell `cp_finish_decl' to ignore the initializer once it is parsed. */
3872 switch (TREE_CODE (decl))
3875 error ("typedef %qD is initialized (use __typeof__ instead)", decl);
3876 return error_mark_node;
3879 error ("function %q#D is initialized like a variable", decl);
3880 return error_mark_node;
3888 if (! toplevel_bindings_p ()
3889 && DECL_EXTERNAL (decl))
3890 warning (0, "declaration of %q#D has %<extern%> and is initialized",
3892 DECL_EXTERNAL (decl) = 0;
3893 if (toplevel_bindings_p ())
3894 TREE_STATIC (decl) = 1;
3897 /* Set attributes here so if duplicate decl, will have proper attributes. */
3898 cplus_decl_attributes (&decl, attributes, 0);
3900 /* Dllimported symbols cannot be defined. Static data members (which
3901 can be initialized in-class and dllimported) go through grokfield,
3902 not here, so we don't need to exclude those decls when checking for
3904 if (initialized && DECL_DLLIMPORT_P (decl))
3906 error ("definition of %q#D is marked %<dllimport%>", decl);
3907 DECL_DLLIMPORT_P (decl) = 0;
3910 /* If #pragma weak was used, mark the decl weak now. */
3911 maybe_apply_pragma_weak (decl);
3913 if (TREE_CODE (decl) == FUNCTION_DECL
3914 && DECL_DECLARED_INLINE_P (decl)
3915 && DECL_UNINLINABLE (decl)
3916 && lookup_attribute ("noinline", DECL_ATTRIBUTES (decl)))
3917 warning (0, "inline function %q+D given attribute noinline", decl);
3919 if (context && COMPLETE_TYPE_P (complete_type (context)))
3921 if (TREE_CODE (decl) == VAR_DECL)
3923 tree field = lookup_field (context, DECL_NAME (decl), 0, false);
3924 if (field == NULL_TREE || TREE_CODE (field) != VAR_DECL)
3925 error ("%q#D is not a static member of %q#T", decl, context);
3928 if (DECL_CONTEXT (field) != context)
3930 if (!same_type_p (DECL_CONTEXT (field), context))
3931 pedwarn ("ISO C++ does not permit %<%T::%D%> "
3932 "to be defined as %<%T::%D%>",
3933 DECL_CONTEXT (field), DECL_NAME (decl),
3934 context, DECL_NAME (decl));
3935 DECL_CONTEXT (decl) = DECL_CONTEXT (field);
3937 if (processing_specialization
3938 && template_class_depth (context) == 0
3939 && CLASSTYPE_TEMPLATE_SPECIALIZATION (context))
3940 error ("template header not allowed in member definition "
3941 "of explicitly specialized class");
3942 /* Static data member are tricky; an in-class initialization
3943 still doesn't provide a definition, so the in-class
3944 declaration will have DECL_EXTERNAL set, but will have an
3945 initialization. Thus, duplicate_decls won't warn
3946 about this situation, and so we check here. */
3947 if (initialized && DECL_INITIALIZED_IN_CLASS_P (field))
3948 error ("duplicate initialization of %qD", decl);
3949 if (duplicate_decls (decl, field, /*newdecl_is_friend=*/false))
3955 tree field = check_classfn (context, decl,
3956 (processing_template_decl
3957 > template_class_depth (context))
3958 ? current_template_parms
3960 if (field && duplicate_decls (decl, field,
3961 /*newdecl_is_friend=*/false))
3965 /* cp_finish_decl sets DECL_EXTERNAL if DECL_IN_AGGR_P is set. */
3966 DECL_IN_AGGR_P (decl) = 0;
3967 /* Do not mark DECL as an explicit specialization if it was not
3968 already marked as an instantiation; a declaration should
3969 never be marked as a specialization unless we know what
3970 template is being specialized. */
3971 if (DECL_LANG_SPECIFIC (decl) && DECL_USE_TEMPLATE (decl))
3973 SET_DECL_TEMPLATE_SPECIALIZATION (decl);
3975 /* [temp.expl.spec] An explicit specialization of a static data
3976 member of a template is a definition if the declaration
3977 includes an initializer; otherwise, it is a declaration.
3979 We check for processing_specialization so this only applies
3980 to the new specialization syntax. */
3981 if (!initialized && processing_specialization)
3982 DECL_EXTERNAL (decl) = 1;
3985 if (DECL_EXTERNAL (decl) && ! DECL_TEMPLATE_SPECIALIZATION (decl))
3986 pedwarn ("declaration of %q#D outside of class is not definition",
3990 was_public = TREE_PUBLIC (decl);
3992 /* Enter this declaration into the symbol table. */
3993 tem = maybe_push_decl (decl);
3995 if (processing_template_decl)
3996 tem = push_template_decl (tem);
3997 if (tem == error_mark_node)
3998 return error_mark_node;
4000 /* Tell the back-end to use or not use .common as appropriate. If we say
4001 -fconserve-space, we want this to save .data space, at the expense of
4002 wrong semantics. If we say -fno-conserve-space, we want this to
4003 produce errors about redefs; to do this we force variables into the
4005 if (flag_conserve_space
4006 && TREE_CODE (tem) == VAR_DECL
4007 && TREE_PUBLIC (tem)
4008 && !DECL_THREAD_LOCAL_P (tem)
4009 && !have_global_bss_p ())
4010 DECL_COMMON (tem) = 1;
4012 if (TREE_CODE (tem) == VAR_DECL
4013 && DECL_NAMESPACE_SCOPE_P (tem) && !TREE_PUBLIC (tem) && !was_public
4014 && !DECL_THIS_STATIC (tem) && !DECL_ARTIFICIAL (tem))
4016 /* This is a const variable with implicit 'static'. Set
4017 DECL_THIS_STATIC so we can tell it from variables that are
4018 !TREE_PUBLIC because of the anonymous namespace. */
4019 gcc_assert (cp_type_readonly (TREE_TYPE (tem)));
4020 DECL_THIS_STATIC (tem) = 1;
4023 if (!processing_template_decl && TREE_CODE (tem) == VAR_DECL)
4024 start_decl_1 (tem, initialized);
4030 start_decl_1 (tree decl, bool initialized)
4034 gcc_assert (!processing_template_decl);
4036 if (error_operand_p (decl))
4039 gcc_assert (TREE_CODE (decl) == VAR_DECL);
4040 type = TREE_TYPE (decl);
4043 /* Is it valid for this decl to have an initializer at all?
4044 If not, set INITIALIZED to zero, which will indirectly
4045 tell `cp_finish_decl' to ignore the initializer once it is parsed. */
4047 /* Don't allow initializations for incomplete types except for
4048 arrays which might be completed by the initialization. */
4049 if (COMPLETE_TYPE_P (complete_type (type)))
4050 ; /* A complete type is ok. */
4051 else if (TREE_CODE (type) != ARRAY_TYPE)
4053 error ("variable %q#D has initializer but incomplete type", decl);
4055 type = TREE_TYPE (decl) = error_mark_node;
4057 else if (!COMPLETE_TYPE_P (complete_type (TREE_TYPE (type))))
4059 if (DECL_LANG_SPECIFIC (decl) && DECL_TEMPLATE_INFO (decl))
4060 error ("elements of array %q#D have incomplete type", decl);
4061 /* else we already gave an error in start_decl. */
4065 else if (IS_AGGR_TYPE (type)
4066 && ! DECL_EXTERNAL (decl))
4068 if (!COMPLETE_TYPE_P (complete_type (type)))
4070 error ("aggregate %q#D has incomplete type and cannot be defined",
4072 /* Change the type so that assemble_variable will give
4073 DECL an rtl we can live with: (mem (const_int 0)). */
4074 type = TREE_TYPE (decl) = error_mark_node;
4078 /* If any base type in the hierarchy of TYPE needs a constructor,
4079 then we set initialized to 1. This way any nodes which are
4080 created for the purposes of initializing this aggregate
4081 will live as long as it does. This is necessary for global
4082 aggregates which do not have their initializers processed until
4083 the end of the file. */
4084 initialized = TYPE_NEEDS_CONSTRUCTING (type);
4088 /* Create a new scope to hold this declaration if necessary.
4089 Whether or not a new scope is necessary cannot be determined
4090 until after the type has been completed; if the type is a
4091 specialization of a class template it is not until after
4092 instantiation has occurred that TYPE_HAS_NONTRIVIAL_DESTRUCTOR
4093 will be set correctly. */
4094 maybe_push_cleanup_level (type);
4097 /* Handle initialization of references. DECL, TYPE, and INIT have the
4098 same meaning as in cp_finish_decl. *CLEANUP must be NULL on entry,
4099 but will be set to a new CLEANUP_STMT if a temporary is created
4100 that must be destroyed subsequently.
4102 Returns an initializer expression to use to initialize DECL, or
4103 NULL if the initialization can be performed statically.
4105 Quotes on semantics can be found in ARM 8.4.3. */
4108 grok_reference_init (tree decl, tree type, tree init, tree *cleanup)
4112 if (init == NULL_TREE)
4114 if ((DECL_LANG_SPECIFIC (decl) == 0
4115 || DECL_IN_AGGR_P (decl) == 0)
4116 && ! DECL_THIS_EXTERN (decl))
4117 error ("%qD declared as reference but not initialized", decl);
4121 if (TREE_CODE (init) == CONSTRUCTOR)
4123 error ("ISO C++ forbids use of initializer list to "
4124 "initialize reference %qD", decl);
4128 if (TREE_CODE (init) == TREE_LIST)
4129 init = build_x_compound_expr_from_list (init, "initializer");
4131 if (TREE_CODE (TREE_TYPE (type)) != ARRAY_TYPE
4132 && TREE_CODE (TREE_TYPE (init)) == ARRAY_TYPE)
4133 /* Note: default conversion is only called in very special cases. */
4134 init = decay_conversion (init);
4136 /* Convert INIT to the reference type TYPE. This may involve the
4137 creation of a temporary, whose lifetime must be the same as that
4138 of the reference. If so, a DECL_EXPR for the temporary will be
4139 added just after the DECL_EXPR for DECL. That's why we don't set
4140 DECL_INITIAL for local references (instead assigning to them
4141 explicitly); we need to allow the temporary to be initialized
4143 tmp = initialize_reference (type, init, decl, cleanup);
4145 if (tmp == error_mark_node)
4147 else if (tmp == NULL_TREE)
4149 error ("cannot initialize %qT from %qT", type, TREE_TYPE (init));
4153 if (TREE_STATIC (decl) && !TREE_CONSTANT (tmp))
4156 DECL_INITIAL (decl) = tmp;
4161 /* Designated initializers in arrays are not supported in GNU C++.
4162 The parser cannot detect this error since it does not know whether
4163 a given brace-enclosed initializer is for a class type or for an
4164 array. This function checks that CE does not use a designated
4165 initializer. If it does, an error is issued. Returns true if CE
4166 is valid, i.e., does not have a designated initializer. */
4169 check_array_designated_initializer (const constructor_elt *ce)
4171 /* Designated initializers for array elements arenot supported. */
4174 /* The parser only allows identifiers as designated
4176 gcc_assert (TREE_CODE (ce->index) == IDENTIFIER_NODE);
4177 error ("name %qD used in a GNU-style designated "
4178 "initializer for an array", ce->index);
4185 /* When parsing `int a[] = {1, 2};' we don't know the size of the
4186 array until we finish parsing the initializer. If that's the
4187 situation we're in, update DECL accordingly. */
4190 maybe_deduce_size_from_array_init (tree decl, tree init)
4192 tree type = TREE_TYPE (decl);
4194 if (TREE_CODE (type) == ARRAY_TYPE
4195 && TYPE_DOMAIN (type) == NULL_TREE
4196 && TREE_CODE (decl) != TYPE_DECL)
4198 /* do_default is really a C-ism to deal with tentative definitions.
4199 But let's leave it here to ease the eventual merge. */
4200 int do_default = !DECL_EXTERNAL (decl);
4201 tree initializer = init ? init : DECL_INITIAL (decl);
4204 /* Check that there are no designated initializers in INIT, as
4205 those are not supported in GNU C++, and as the middle-end
4206 will crash if presented with a non-numeric designated
4208 if (initializer && TREE_CODE (initializer) == CONSTRUCTOR)
4210 VEC(constructor_elt,gc) *v = CONSTRUCTOR_ELTS (initializer);
4211 constructor_elt *ce;
4214 VEC_iterate (constructor_elt, v, i, ce);
4216 if (!check_array_designated_initializer (ce))
4222 failure = cp_complete_array_type (&TREE_TYPE (decl), initializer,
4226 error ("initializer fails to determine size of %qD", decl);
4227 TREE_TYPE (decl) = error_mark_node;
4229 else if (failure == 2)
4233 error ("array size missing in %qD", decl);
4234 TREE_TYPE (decl) = error_mark_node;
4236 /* If a `static' var's size isn't known, make it extern as
4237 well as static, so it does not get allocated. If it's not
4238 `static', then don't mark it extern; finish_incomplete_decl
4239 will give it a default size and it will get allocated. */
4240 else if (!pedantic && TREE_STATIC (decl) && !TREE_PUBLIC (decl))
4241 DECL_EXTERNAL (decl) = 1;
4243 else if (failure == 3)
4245 error ("zero-size array %qD", decl);
4246 TREE_TYPE (decl) = error_mark_node;
4250 cp_apply_type_quals_to_decl (cp_type_quals (TREE_TYPE (decl)), decl);
4252 layout_decl (decl, 0);
4256 /* Set DECL_SIZE, DECL_ALIGN, etc. for DECL (a VAR_DECL), and issue
4257 any appropriate error messages regarding the layout. */
4260 layout_var_decl (tree decl)
4264 type = TREE_TYPE (decl);
4265 if (type == error_mark_node)
4268 /* If we haven't already layed out this declaration, do so now.
4269 Note that we must not call complete type for an external object
4270 because it's type might involve templates that we are not
4271 supposed to instantiate yet. (And it's perfectly valid to say
4272 `extern X x' for some incomplete type `X'.) */
4273 if (!DECL_EXTERNAL (decl))
4274 complete_type (type);
4275 if (!DECL_SIZE (decl)
4276 && TREE_TYPE (decl) != error_mark_node
4277 && (COMPLETE_TYPE_P (type)
4278 || (TREE_CODE (type) == ARRAY_TYPE
4279 && !TYPE_DOMAIN (type)
4280 && COMPLETE_TYPE_P (TREE_TYPE (type)))))
4281 layout_decl (decl, 0);
4283 if (!DECL_EXTERNAL (decl) && DECL_SIZE (decl) == NULL_TREE)
4285 /* An automatic variable with an incomplete type: that is an error.
4286 Don't talk about array types here, since we took care of that
4287 message in grokdeclarator. */
4288 error ("storage size of %qD isn't known", decl);
4289 TREE_TYPE (decl) = error_mark_node;
4292 /* Keep this code around in case we later want to control debug info
4293 based on whether a type is "used". (jason 1999-11-11) */
4295 else if (!DECL_EXTERNAL (decl) && IS_AGGR_TYPE (ttype))
4296 /* Let debugger know it should output info for this type. */
4297 note_debug_info_needed (ttype);
4299 if (TREE_STATIC (decl) && DECL_CLASS_SCOPE_P (decl))
4300 note_debug_info_needed (DECL_CONTEXT (decl));
4303 if ((DECL_EXTERNAL (decl) || TREE_STATIC (decl))
4304 && DECL_SIZE (decl) != NULL_TREE
4305 && ! TREE_CONSTANT (DECL_SIZE (decl)))
4307 if (TREE_CODE (DECL_SIZE (decl)) == INTEGER_CST)
4308 constant_expression_warning (DECL_SIZE (decl));
4310 error ("storage size of %qD isn't constant", decl);
4314 /* If a local static variable is declared in an inline function, or if
4315 we have a weak definition, we must endeavor to create only one
4316 instance of the variable at link-time. */
4319 maybe_commonize_var (tree decl)
4321 /* Static data in a function with comdat linkage also has comdat
4323 if (TREE_STATIC (decl)
4324 /* Don't mess with __FUNCTION__. */
4325 && ! DECL_ARTIFICIAL (decl)
4326 && DECL_FUNCTION_SCOPE_P (decl)
4327 /* Unfortunately, import_export_decl has not always been called
4328 before the function is processed, so we cannot simply check
4330 && (DECL_COMDAT (DECL_CONTEXT (decl))
4331 || ((DECL_DECLARED_INLINE_P (DECL_CONTEXT (decl))
4332 || DECL_TEMPLATE_INSTANTIATION (DECL_CONTEXT (decl)))
4333 && TREE_PUBLIC (DECL_CONTEXT (decl)))))
4337 /* With weak symbols, we simply make the variable COMDAT;
4338 that will cause copies in multiple translations units to
4340 comdat_linkage (decl);
4344 if (DECL_INITIAL (decl) == NULL_TREE
4345 || DECL_INITIAL (decl) == error_mark_node)
4347 /* Without weak symbols, we can use COMMON to merge
4348 uninitialized variables. */
4349 TREE_PUBLIC (decl) = 1;
4350 DECL_COMMON (decl) = 1;
4354 /* While for initialized variables, we must use internal
4355 linkage -- which means that multiple copies will not
4357 TREE_PUBLIC (decl) = 0;
4358 DECL_COMMON (decl) = 0;
4359 warning (0, "sorry: semantics of inline function static "
4360 "data %q+#D are wrong (you'll wind up "
4361 "with multiple copies)", decl);
4362 warning (0, "%J you can work around this by removing "
4368 else if (DECL_LANG_SPECIFIC (decl) && DECL_COMDAT (decl))
4369 /* Set it up again; we might have set DECL_INITIAL since the last
4371 comdat_linkage (decl);
4374 /* Issue an error message if DECL is an uninitialized const variable. */
4377 check_for_uninitialized_const_var (tree decl)
4379 tree type = TREE_TYPE (decl);
4381 /* ``Unless explicitly declared extern, a const object does not have
4382 external linkage and must be initialized. ($8.4; $12.1)'' ARM
4384 if (TREE_CODE (decl) == VAR_DECL
4385 && TREE_CODE (type) != REFERENCE_TYPE
4386 && CP_TYPE_CONST_P (type)
4387 && !TYPE_NEEDS_CONSTRUCTING (type)
4388 && !DECL_INITIAL (decl))
4389 error ("uninitialized const %qD", decl);
4393 /* Structure holding the current initializer being processed by reshape_init.
4394 CUR is a pointer to the current element being processed, END is a pointer
4395 after the last element present in the initializer. */
4396 typedef struct reshape_iterator_t
4398 constructor_elt *cur;
4399 constructor_elt *end;
4402 static tree reshape_init_r (tree, reshape_iter *, bool);
4404 /* FIELD is a FIELD_DECL or NULL. In the former case, the value
4405 returned is the next FIELD_DECL (possibly FIELD itself) that can be
4406 initialized. If there are no more such fields, the return value
4410 next_initializable_field (tree field)
4413 && (TREE_CODE (field) != FIELD_DECL
4414 || (DECL_C_BIT_FIELD (field) && !DECL_NAME (field))
4415 || DECL_ARTIFICIAL (field)))
4416 field = TREE_CHAIN (field);
4421 /* Subroutine of reshape_init_array and reshape_init_vector, which does
4422 the actual work. ELT_TYPE is the element type of the array. MAX_INDEX is an
4423 INTEGER_CST representing the size of the array minus one (the maximum index),
4424 or NULL_TREE if the array was declared without specifying the size. D is
4425 the iterator within the constructor. */
4428 reshape_init_array_1 (tree elt_type, tree max_index, reshape_iter *d)
4431 bool sized_array_p = (max_index != NULL_TREE);
4432 unsigned HOST_WIDE_INT max_index_cst = 0;
4433 unsigned HOST_WIDE_INT index;
4435 /* The initializer for an array is always a CONSTRUCTOR. */
4436 new_init = build_constructor (NULL_TREE, NULL);
4440 /* Minus 1 is used for zero sized arrays. */
4441 if (integer_all_onesp (max_index))
4444 if (host_integerp (max_index, 1))
4445 max_index_cst = tree_low_cst (max_index, 1);
4446 /* sizetype is sign extended, not zero extended. */
4448 max_index_cst = tree_low_cst (fold_convert (size_type_node, max_index),
4452 /* Loop until there are no more initializers. */
4454 d->cur != d->end && (!sized_array_p || index <= max_index_cst);
4459 check_array_designated_initializer (d->cur);
4460 elt_init = reshape_init_r (elt_type, d, /*first_initializer_p=*/false);
4461 if (elt_init == error_mark_node)
4462 return error_mark_node;
4463 CONSTRUCTOR_APPEND_ELT (CONSTRUCTOR_ELTS (new_init), NULL_TREE, elt_init);
4469 /* Subroutine of reshape_init_r, processes the initializers for arrays.
4470 Parameters are the same of reshape_init_r. */
4473 reshape_init_array (tree type, reshape_iter *d)
4475 tree max_index = NULL_TREE;
4477 gcc_assert (TREE_CODE (type) == ARRAY_TYPE);
4479 if (TYPE_DOMAIN (type))
4480 max_index = array_type_nelts (type);
4482 return reshape_init_array_1 (TREE_TYPE (type), max_index, d);
4485 /* Subroutine of reshape_init_r, processes the initializers for vectors.
4486 Parameters are the same of reshape_init_r. */
4489 reshape_init_vector (tree type, reshape_iter *d)
4491 tree max_index = NULL_TREE;
4494 gcc_assert (TREE_CODE (type) == VECTOR_TYPE);
4496 if (COMPOUND_LITERAL_P (d->cur->value))
4498 tree value = d->cur->value;
4499 if (!same_type_p (TREE_TYPE (value), type))
4501 error ("invalid type %qT as initializer for a vector of type %qT",
4502 TREE_TYPE (d->cur->value), type);
4503 value = error_mark_node;
4509 /* For a vector, the representation type is a struct
4510 containing a single member which is an array of the
4511 appropriate size. */
4512 rtype = TYPE_DEBUG_REPRESENTATION_TYPE (type);
4513 if (rtype && TYPE_DOMAIN (TREE_TYPE (TYPE_FIELDS (rtype))))
4514 max_index = array_type_nelts (TREE_TYPE (TYPE_FIELDS (rtype)));
4516 return reshape_init_array_1 (TREE_TYPE (type), max_index, d);
4519 /* Subroutine of reshape_init_r, processes the initializers for classes
4520 or union. Parameters are the same of reshape_init_r. */
4523 reshape_init_class (tree type, reshape_iter *d, bool first_initializer_p)
4528 gcc_assert (CLASS_TYPE_P (type));
4530 /* The initializer for a class is always a CONSTRUCTOR. */
4531 new_init = build_constructor (NULL_TREE, NULL);
4532 field = next_initializable_field (TYPE_FIELDS (type));
4538 An initializer for an aggregate member that is an
4539 empty class shall have the form of an empty
4540 initializer-list {}. */
4541 if (!first_initializer_p)
4543 error ("initializer for %qT must be brace-enclosed", type);
4544 return error_mark_node;
4549 /* Loop through the initializable fields, gathering initializers. */
4550 while (d->cur != d->end)
4554 /* Handle designated initializers, as an extension. */
4557 field = lookup_field_1 (type, d->cur->index, /*want_type=*/false);
4559 if (!field || TREE_CODE (field) != FIELD_DECL)
4561 error ("%qT has no non-static data member named %qD", type,
4563 return error_mark_node;
4567 /* If we processed all the member of the class, we are done. */
4571 field_init = reshape_init_r (TREE_TYPE (field), d,
4572 /*first_initializer_p=*/false);
4573 CONSTRUCTOR_APPEND_ELT (CONSTRUCTOR_ELTS (new_init), field, field_init);
4577 When a union is initialized with a brace-enclosed
4578 initializer, the braces shall only contain an
4579 initializer for the first member of the union. */
4580 if (TREE_CODE (type) == UNION_TYPE)
4583 field = next_initializable_field (TREE_CHAIN (field));
4589 /* Subroutine of reshape_init, which processes a single initializer (part of
4590 a CONSTRUCTOR). TYPE is the type of the variable being initialized, D is the
4591 iterator within the CONSTRUCTOR which points to the initializer to process.
4592 FIRST_INITIALIZER_P is true if this is the first initializer of the
4593 CONSTRUCTOR node. */
4596 reshape_init_r (tree type, reshape_iter *d, bool first_initializer_p)
4598 tree init = d->cur->value;
4600 /* A non-aggregate type is always initialized with a single
4602 if (!CP_AGGREGATE_TYPE_P (type))
4604 /* It is invalid to initialize a non-aggregate type with a
4605 brace-enclosed initializer.
4606 We need to check for BRACE_ENCLOSED_INITIALIZER_P here because
4607 of g++.old-deja/g++.mike/p7626.C: a pointer-to-member constant is
4608 a CONSTRUCTOR (with a record type). */
4609 if (TREE_CODE (init) == CONSTRUCTOR
4610 && BRACE_ENCLOSED_INITIALIZER_P (init)) /* p7626.C */
4612 error ("braces around scalar initializer for type %qT", type);
4613 init = error_mark_node;
4622 All implicit type conversions (clause _conv_) are considered when
4623 initializing the aggregate member with an initializer from an
4624 initializer-list. If the initializer can initialize a member,
4625 the member is initialized. Otherwise, if the member is itself a
4626 non-empty subaggregate, brace elision is assumed and the
4627 initializer is considered for the initialization of the first
4628 member of the subaggregate. */
4629 if (TREE_CODE (init) != CONSTRUCTOR
4630 && can_convert_arg (type, TREE_TYPE (init), init, LOOKUP_NORMAL))
4636 /* [dcl.init.string]
4638 A char array (whether plain char, signed char, or unsigned char)
4639 can be initialized by a string-literal (optionally enclosed in
4640 braces); a wchar_t array can be initialized by a wide
4641 string-literal (optionally enclosed in braces). */
4642 if (TREE_CODE (type) == ARRAY_TYPE
4643 && char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (type))))
4645 tree str_init = init;
4647 /* Strip one level of braces if and only if they enclose a single
4648 element (as allowed by [dcl.init.string]). */
4649 if (!first_initializer_p
4650 && TREE_CODE (str_init) == CONSTRUCTOR
4651 && VEC_length (constructor_elt, CONSTRUCTOR_ELTS (str_init)) == 1)
4653 str_init = VEC_index (constructor_elt,
4654 CONSTRUCTOR_ELTS (str_init), 0)->value;
4657 /* If it's a string literal, then it's the initializer for the array
4658 as a whole. Otherwise, continue with normal initialization for
4659 array types (one value per array element). */
4660 if (TREE_CODE (str_init) == STRING_CST)
4667 /* The following cases are about aggregates. If we are not within a full
4668 initializer already, and there is not a CONSTRUCTOR, it means that there
4669 is a missing set of braces (that is, we are processing the case for
4670 which reshape_init exists). */
4671 if (!first_initializer_p)
4673 if (TREE_CODE (init) == CONSTRUCTOR)
4675 if (TREE_TYPE (init) && TYPE_PTRMEMFUNC_P (TREE_TYPE (init)))
4676 /* There is no need to reshape pointer-to-member function
4677 initializers, as they are always constructed correctly
4678 by the front end. */
4680 else if (COMPOUND_LITERAL_P (init))
4681 /* For a nested compound literal, there is no need to reshape since
4682 brace elision is not allowed. Even if we decided to allow it,
4683 we should add a call to reshape_init in finish_compound_literal,
4684 before calling digest_init, so changing this code would still
4685 not be necessary. */
4686 gcc_assert (!BRACE_ENCLOSED_INITIALIZER_P (init));
4690 gcc_assert (BRACE_ENCLOSED_INITIALIZER_P (init));
4691 return reshape_init (type, init);
4695 warning (OPT_Wmissing_braces, "missing braces around initializer for %qT",
4699 /* Dispatch to specialized routines. */
4700 if (CLASS_TYPE_P (type))
4701 return reshape_init_class (type, d, first_initializer_p);
4702 else if (TREE_CODE (type) == ARRAY_TYPE)
4703 return reshape_init_array (type, d);
4704 else if (TREE_CODE (type) == VECTOR_TYPE)
4705 return reshape_init_vector (type, d);
4710 /* Undo the brace-elision allowed by [dcl.init.aggr] in a
4711 brace-enclosed aggregate initializer.
4713 INIT is the CONSTRUCTOR containing the list of initializers describing
4714 a brace-enclosed initializer for an entity of the indicated aggregate TYPE.
4715 It may not presently match the shape of the TYPE; for example:
4717 struct S { int a; int b; };
4718 struct S a[] = { 1, 2, 3, 4 };
4720 Here INIT will hold a VEC of four elements, rather than a
4721 VEC of two elements, each itself a VEC of two elements. This
4722 routine transforms INIT from the former form into the latter. The
4723 revised CONSTRUCTOR node is returned. */
4726 reshape_init (tree type, tree init)
4728 VEC(constructor_elt, gc) *v;
4732 gcc_assert (BRACE_ENCLOSED_INITIALIZER_P (init));
4734 v = CONSTRUCTOR_ELTS (init);
4736 /* An empty constructor does not need reshaping, and it is always a valid
4738 if (VEC_empty (constructor_elt, v))
4741 /* Recurse on this CONSTRUCTOR. */
4742 d.cur = VEC_index (constructor_elt, v, 0);
4743 d.end = d.cur + VEC_length (constructor_elt, v);
4745 new_init = reshape_init_r (type, &d, true);
4746 if (new_init == error_mark_node)
4747 return error_mark_node;
4749 /* Make sure all the element of the constructor were used. Otherwise,
4750 issue an error about exceeding initializers. */
4752 error ("too many initializers for %qT", type);
4757 /* Verify INIT (the initializer for DECL), and record the
4758 initialization in DECL_INITIAL, if appropriate. CLEANUP is as for
4759 grok_reference_init.
4761 If the return value is non-NULL, it is an expression that must be
4762 evaluated dynamically to initialize DECL. */
4765 check_initializer (tree decl, tree init, int flags, tree *cleanup)
4767 tree type = TREE_TYPE (decl);
4768 tree init_code = NULL;
4770 /* Things that are going to be initialized need to have complete
4772 TREE_TYPE (decl) = type = complete_type (TREE_TYPE (decl));
4774 if (type == error_mark_node)
4775 /* We will have already complained. */
4778 if (TREE_CODE (type) == ARRAY_TYPE)
4780 tree element_type = TREE_TYPE (type);
4782 /* The array type itself need not be complete, because the
4783 initializer may tell us how many elements are in the array.
4784 But, the elements of the array must be complete. */
4785 if (!COMPLETE_TYPE_P (complete_type (element_type)))
4787 error ("elements of array %q#D have incomplete type", decl);
4790 /* It is not valid to initialize an a VLA. */
4792 && ((COMPLETE_TYPE_P (type) && !TREE_CONSTANT (TYPE_SIZE (type)))
4793 || !TREE_CONSTANT (TYPE_SIZE (element_type))))
4795 error ("variable-sized object %qD may not be initialized", decl);
4799 else if (!COMPLETE_TYPE_P (type))
4801 error ("%qD has incomplete type", decl);
4802 TREE_TYPE (decl) = error_mark_node;
4806 /* There is no way to make a variable-sized class type in GNU C++. */
4807 gcc_assert (TREE_CONSTANT (TYPE_SIZE (type)));
4809 if (!CP_AGGREGATE_TYPE_P (type)
4810 && init && BRACE_ENCLOSED_INITIALIZER_P (init)
4811 && VEC_length (constructor_elt, CONSTRUCTOR_ELTS (init)) != 1)
4813 error ("scalar object %qD requires one element in initializer", decl);
4814 TREE_TYPE (decl) = error_mark_node;
4818 if (TREE_CODE (decl) == CONST_DECL)
4820 gcc_assert (TREE_CODE (type) != REFERENCE_TYPE);
4822 DECL_INITIAL (decl) = init;
4824 gcc_assert (init != NULL_TREE);
4827 else if (!DECL_EXTERNAL (decl) && TREE_CODE (type) == REFERENCE_TYPE)
4828 init = grok_reference_init (decl, type, init, cleanup);
4831 /* Do not reshape constructors of vectors (they don't need to be
4833 if (TREE_CODE (init) == CONSTRUCTOR
4834 && !COMPOUND_LITERAL_P (init)
4835 && !TREE_TYPE (init)) /* ptrmemfunc */
4837 init = reshape_init (type, init);
4839 if ((*targetm.vector_opaque_p) (type))
4841 error ("opaque vector types cannot be initialized");
4842 init = error_mark_node;
4846 /* If DECL has an array type without a specific bound, deduce the
4847 array size from the initializer. */
4848 maybe_deduce_size_from_array_init (decl, init);
4849 type = TREE_TYPE (decl);
4850 if (type == error_mark_node)
4853 if (TYPE_HAS_CONSTRUCTOR (type) || TYPE_NEEDS_CONSTRUCTING (type))
4855 if (TREE_CODE (type) == ARRAY_TYPE)
4856 goto initialize_aggr;
4857 else if (TREE_CODE (init) == CONSTRUCTOR)
4859 if (TYPE_NON_AGGREGATE_CLASS (type))
4861 error ("%qD must be initialized by constructor, "
4864 init = error_mark_node;
4867 goto dont_use_constructor;
4871 int saved_stmts_are_full_exprs_p;
4874 saved_stmts_are_full_exprs_p = 0;
4875 if (building_stmt_tree ())
4877 saved_stmts_are_full_exprs_p = stmts_are_full_exprs_p ();
4878 current_stmt_tree ()->stmts_are_full_exprs_p = 1;
4880 init = build_aggr_init (decl, init, flags);
4881 if (building_stmt_tree ())
4882 current_stmt_tree ()->stmts_are_full_exprs_p =
4883 saved_stmts_are_full_exprs_p;
4889 dont_use_constructor:
4890 if (TREE_CODE (init) != TREE_VEC)
4892 init_code = store_init_value (decl, init);
4893 if (pedantic && TREE_CODE (type) == ARRAY_TYPE
4894 && DECL_INITIAL (decl)
4895 && TREE_CODE (DECL_INITIAL (decl)) == STRING_CST
4896 && PAREN_STRING_LITERAL_P (DECL_INITIAL (decl)))
4897 warning (0, "array %qD initialized by parenthesized string literal %qE",
4898 decl, DECL_INITIAL (decl));
4903 else if (DECL_EXTERNAL (decl))
4905 else if (TYPE_P (type) && TYPE_NEEDS_CONSTRUCTING (type))
4906 goto initialize_aggr;
4907 else if (IS_AGGR_TYPE (type))
4909 tree core_type = strip_array_types (type);
4911 if (CLASSTYPE_READONLY_FIELDS_NEED_INIT (core_type))
4912 error ("structure %qD with uninitialized const members", decl);
4913 if (CLASSTYPE_REF_FIELDS_NEED_INIT (core_type))
4914 error ("structure %qD with uninitialized reference members", decl);
4916 check_for_uninitialized_const_var (decl);
4919 check_for_uninitialized_const_var (decl);
4921 if (init && init != error_mark_node)
4922 init_code = build2 (INIT_EXPR, type, decl, init);
4927 /* If DECL is not a local variable, give it RTL. */
4930 make_rtl_for_nonlocal_decl (tree decl, tree init, const char* asmspec)
4932 int toplev = toplevel_bindings_p ();
4934 const char *filename;
4936 /* Set the DECL_ASSEMBLER_NAME for the object. */
4939 /* The `register' keyword, when used together with an
4940 asm-specification, indicates that the variable should be
4941 placed in a particular register. */
4942 if (TREE_CODE (decl) == VAR_DECL && DECL_REGISTER (decl))
4944 set_user_assembler_name (decl, asmspec);
4945 DECL_HARD_REGISTER (decl) = 1;
4949 if (TREE_CODE (decl) == FUNCTION_DECL
4950 && DECL_BUILT_IN_CLASS (decl) == BUILT_IN_NORMAL)
4951 set_builtin_user_assembler_name (decl, asmspec);
4952 set_user_assembler_name (decl, asmspec);
4956 /* Handle non-variables up front. */
4957 if (TREE_CODE (decl) != VAR_DECL)
4959 rest_of_decl_compilation (decl, toplev, at_eof);
4963 /* If we see a class member here, it should be a static data
4965 if (DECL_LANG_SPECIFIC (decl) && DECL_IN_AGGR_P (decl))
4967 gcc_assert (TREE_STATIC (decl));
4968 /* An in-class declaration of a static data member should be
4969 external; it is only a declaration, and not a definition. */
4970 if (init == NULL_TREE)
4971 gcc_assert (DECL_EXTERNAL (decl));
4974 /* We don't create any RTL for local variables. */
4975 if (DECL_FUNCTION_SCOPE_P (decl) && !TREE_STATIC (decl))
4978 /* We defer emission of local statics until the corresponding
4979 DECL_EXPR is expanded. */
4980 defer_p = DECL_FUNCTION_SCOPE_P (decl) || DECL_VIRTUAL_P (decl);
4982 /* We try to defer namespace-scope static constants so that they are
4983 not emitted into the object file unnecessarily. */
4984 filename = input_filename;
4985 if (!DECL_VIRTUAL_P (decl)
4986 && TREE_READONLY (decl)
4987 && DECL_INITIAL (decl) != NULL_TREE
4988 && DECL_INITIAL (decl) != error_mark_node
4990 && ! EMPTY_CONSTRUCTOR_P (DECL_INITIAL (decl))
4992 && !TREE_PUBLIC (decl))
4994 /* Fool with the linkage of static consts according to #pragma
4996 struct c_fileinfo *finfo = get_fileinfo (filename);
4997 if (!finfo->interface_unknown && !TREE_PUBLIC (decl))
4999 TREE_PUBLIC (decl) = 1;
5000 DECL_EXTERNAL (decl) = finfo->interface_only;
5005 /* Likewise for template instantiations. */
5006 else if (DECL_LANG_SPECIFIC (decl)
5007 && DECL_IMPLICIT_INSTANTIATION (decl))
5010 /* If we're not deferring, go ahead and assemble the variable. */
5012 rest_of_decl_compilation (decl, toplev, at_eof);
5015 /* Generate code to initialize DECL (a local variable). */
5018 initialize_local_var (tree decl, tree init)
5020 tree type = TREE_TYPE (decl);
5023 gcc_assert (TREE_CODE (decl) == VAR_DECL
5024 || TREE_CODE (decl) == RESULT_DECL);
5025 gcc_assert (!TREE_STATIC (decl));
5027 if (DECL_SIZE (decl) == NULL_TREE)
5029 /* If we used it already as memory, it must stay in memory. */
5030 DECL_INITIAL (decl) = NULL_TREE;
5031 TREE_ADDRESSABLE (decl) = TREE_USED (decl);
5034 if (DECL_SIZE (decl) && type != error_mark_node)
5038 /* Compute and store the initial value. */
5039 already_used = TREE_USED (decl) || TREE_USED (type);
5041 /* Perform the initialization. */
5044 int saved_stmts_are_full_exprs_p;
5046 gcc_assert (building_stmt_tree ());
5047 saved_stmts_are_full_exprs_p = stmts_are_full_exprs_p ();
5048 current_stmt_tree ()->stmts_are_full_exprs_p = 1;
5049 finish_expr_stmt (init);
5050 current_stmt_tree ()->stmts_are_full_exprs_p =
5051 saved_stmts_are_full_exprs_p;
5054 /* Set this to 0 so we can tell whether an aggregate which was
5055 initialized was ever used. Don't do this if it has a
5056 destructor, so we don't complain about the 'resource
5057 allocation is initialization' idiom. Now set
5058 attribute((unused)) on types so decls of that type will be
5059 marked used. (see TREE_USED, above.) */
5060 if (TYPE_NEEDS_CONSTRUCTING (type)
5062 && TYPE_HAS_TRIVIAL_DESTRUCTOR (type)
5063 && DECL_NAME (decl))
5064 TREE_USED (decl) = 0;
5065 else if (already_used)
5066 TREE_USED (decl) = 1;
5069 /* Generate a cleanup, if necessary. */
5070 cleanup = cxx_maybe_build_cleanup (decl);
5071 if (DECL_SIZE (decl) && cleanup)
5072 finish_decl_cleanup (decl, cleanup);
5075 /* DECL is a VAR_DECL for a compiler-generated variable with static
5076 storage duration (like a virtual table) whose initializer is a
5077 compile-time constant. INIT must be either a TREE_LIST of values,
5078 or a CONSTRUCTOR. Initialize the variable and provide it to the
5082 initialize_artificial_var (tree decl, tree init)
5084 gcc_assert (DECL_ARTIFICIAL (decl));
5085 if (TREE_CODE (init) == TREE_LIST)
5086 init = build_constructor_from_list (NULL_TREE, init);
5087 gcc_assert (TREE_CODE (init) == CONSTRUCTOR);
5088 DECL_INITIAL (decl) = init;
5089 DECL_INITIALIZED_P (decl) = 1;
5090 determine_visibility (decl);
5091 layout_var_decl (decl);
5092 maybe_commonize_var (decl);
5093 make_rtl_for_nonlocal_decl (decl, init, /*asmspec=*/NULL);
5096 /* INIT is the initializer for a variable, as represented by the
5097 parser. Returns true iff INIT is value-dependent. */
5100 value_dependent_init_p (tree init)
5102 if (TREE_CODE (init) == TREE_LIST)
5103 /* A parenthesized initializer, e.g.: int i (3, 2); ? */
5104 return any_value_dependent_elements_p (init);
5105 else if (TREE_CODE (init) == CONSTRUCTOR)
5106 /* A brace-enclosed initializer, e.g.: int i = { 3 }; ? */
5108 VEC(constructor_elt, gc) *elts;
5112 elts = CONSTRUCTOR_ELTS (init);
5113 nelts = VEC_length (constructor_elt, elts);
5114 for (i = 0; i < nelts; ++i)
5115 if (value_dependent_init_p (VEC_index (constructor_elt,
5120 /* It must be a simple expression, e.g., int i = 3; */
5121 return value_dependent_expression_p (init);
5126 /* Finish processing of a declaration;
5127 install its line number and initial value.
5128 If the length of an array type is not known before,
5129 it must be determined now, from the initial value, or it is an error.
5131 INIT is the initializer (if any) for DECL. If INIT_CONST_EXPR_P is
5132 true, then INIT is an integral constant expression.
5134 FLAGS is LOOKUP_ONLYCONVERTING if the = init syntax was used, else 0
5135 if the (init) syntax was used. */
5138 cp_finish_decl (tree decl, tree init, bool init_const_expr_p,
5139 tree asmspec_tree, int flags)
5143 const char *asmspec = NULL;
5144 int was_readonly = 0;
5145 bool var_definition_p = false;
5146 int saved_processing_template_decl;
5148 if (decl == error_mark_node)
5153 error ("assignment (not initialization) in declaration");
5157 gcc_assert (TREE_CODE (decl) != RESULT_DECL);
5158 /* Parameters are handled by store_parm_decls, not cp_finish_decl. */
5159 gcc_assert (TREE_CODE (decl) != PARM_DECL);
5161 type = TREE_TYPE (decl);
5162 if (type == error_mark_node)
5165 /* Assume no cleanup is required. */
5166 cleanup = NULL_TREE;
5167 saved_processing_template_decl = processing_template_decl;
5169 /* If a name was specified, get the string. */
5170 if (global_scope_p (current_binding_level))
5171 asmspec_tree = maybe_apply_renaming_pragma (decl, asmspec_tree);
5172 if (asmspec_tree && asmspec_tree != error_mark_node)
5173 asmspec = TREE_STRING_POINTER (asmspec_tree);
5175 if (current_class_type
5176 && CP_DECL_CONTEXT (decl) == current_class_type
5177 && TYPE_BEING_DEFINED (current_class_type)
5178 && (DECL_INITIAL (decl) || init))
5179 DECL_INITIALIZED_IN_CLASS_P (decl) = 1;
5181 if (processing_template_decl)
5183 bool type_dependent_p;
5185 /* Add this declaration to the statement-tree. */
5186 if (at_function_scope_p ())
5187 add_decl_expr (decl);
5189 type_dependent_p = dependent_type_p (type);
5191 if (init && init_const_expr_p)
5193 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (decl) = 1;
5194 if (DECL_INTEGRAL_CONSTANT_VAR_P (decl))
5195 TREE_CONSTANT (decl) = 1;
5198 /* Generally, initializers in templates are expanded when the
5199 template is instantiated. But, if DECL is an integral
5200 constant static data member, then it can be used in future
5201 integral constant expressions, and its value must be
5204 && DECL_CLASS_SCOPE_P (decl)
5205 && DECL_INTEGRAL_CONSTANT_VAR_P (decl)
5206 && !type_dependent_p
5207 && !value_dependent_init_p (init)))
5210 DECL_INITIAL (decl) = init;
5211 if (TREE_CODE (decl) == VAR_DECL
5212 && !DECL_PRETTY_FUNCTION_P (decl)
5213 && !type_dependent_p)
5214 maybe_deduce_size_from_array_init (decl, init);
5218 init = fold_non_dependent_expr (init);
5219 processing_template_decl = 0;
5222 /* Take care of TYPE_DECLs up front. */
5223 if (TREE_CODE (decl) == TYPE_DECL)
5225 if (type != error_mark_node
5226 && IS_AGGR_TYPE (type) && DECL_NAME (decl))
5228 if (TREE_TYPE (DECL_NAME (decl)) && TREE_TYPE (decl) != type)
5229 warning (0, "shadowing previous type declaration of %q#D", decl);
5230 set_identifier_type_value (DECL_NAME (decl), decl);
5233 /* If we have installed this as the canonical typedef for this
5234 type, and that type has not been defined yet, delay emitting
5235 the debug information for it, as we will emit it later. */
5236 if (TYPE_MAIN_DECL (TREE_TYPE (decl)) == decl
5237 && !COMPLETE_TYPE_P (TREE_TYPE (decl)))
5238 TYPE_DECL_SUPPRESS_DEBUG (decl) = 1;
5240 rest_of_decl_compilation (decl, DECL_CONTEXT (decl) == NULL_TREE,
5245 /* A reference will be modified here, as it is initialized. */
5246 if (! DECL_EXTERNAL (decl)
5247 && TREE_READONLY (decl)
5248 && TREE_CODE (type) == REFERENCE_TYPE)
5251 TREE_READONLY (decl) = 0;
5254 if (TREE_CODE (decl) == VAR_DECL)
5256 /* Only PODs can have thread-local storage. Other types may require
5257 various kinds of non-trivial initialization. */
5258 if (DECL_THREAD_LOCAL_P (decl) && !pod_type_p (TREE_TYPE (decl)))
5259 error ("%qD cannot be thread-local because it has non-POD type %qT",
5260 decl, TREE_TYPE (decl));
5261 /* If this is a local variable that will need a mangled name,
5262 register it now. We must do this before processing the
5263 initializer for the variable, since the initialization might
5264 require a guard variable, and since the mangled name of the
5265 guard variable will depend on the mangled name of this
5267 if (!processing_template_decl
5268 && DECL_FUNCTION_SCOPE_P (decl)
5269 && TREE_STATIC (decl)
5270 && !DECL_ARTIFICIAL (decl))
5271 push_local_name (decl);
5272 /* Convert the initializer to the type of DECL, if we have not
5273 already initialized DECL. */
5274 if (!DECL_INITIALIZED_P (decl)
5275 /* If !DECL_EXTERNAL then DECL is being defined. In the
5276 case of a static data member initialized inside the
5277 class-specifier, there can be an initializer even if DECL
5278 is *not* defined. */
5279 && (!DECL_EXTERNAL (decl) || init))
5283 DECL_NONTRIVIALLY_INITIALIZED_P (decl) = 1;
5284 if (init_const_expr_p)
5286 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (decl) = 1;
5287 if (DECL_INTEGRAL_CONSTANT_VAR_P (decl))
5288 TREE_CONSTANT (decl) = 1;
5291 init = check_initializer (decl, init, flags, &cleanup);
5292 /* Thread-local storage cannot be dynamically initialized. */
5293 if (DECL_THREAD_LOCAL_P (decl) && init)
5295 error ("%qD is thread-local and so cannot be dynamically "
5296 "initialized", decl);
5300 /* Check that the initializer for a static data member was a
5301 constant. Although we check in the parser that the
5302 initializer is an integral constant expression, we do not
5303 simplify division-by-zero at the point at which it
5304 occurs. Therefore, in:
5306 struct S { static const int i = 7 / 0; };
5308 we issue an error at this point. It would
5309 probably be better to forbid division by zero in
5310 integral constant expressions. */
5311 if (DECL_EXTERNAL (decl) && init)
5313 error ("%qD cannot be initialized by a non-constant expression"
5314 " when being declared", decl);
5315 DECL_INITIALIZED_IN_CLASS_P (decl) = 0;
5323 The memory occupied by any object of static storage
5324 duration is zero-initialized at program startup before
5325 any other initialization takes place.
5327 We cannot create an appropriate initializer until after
5328 the type of DECL is finalized. If DECL_INITIAL is set,
5329 then the DECL is statically initialized, and any
5330 necessary zero-initialization has already been performed. */
5331 if (TREE_STATIC (decl) && !DECL_INITIAL (decl))
5332 DECL_INITIAL (decl) = build_zero_init (TREE_TYPE (decl),
5333 /*nelts=*/NULL_TREE,
5334 /*static_storage_p=*/true);
5335 /* Remember that the initialization for this variable has
5337 DECL_INITIALIZED_P (decl) = 1;
5338 /* This declaration is the definition of this variable,
5339 unless we are initializing a static data member within
5340 the class specifier. */
5341 if (!DECL_EXTERNAL (decl))
5342 var_definition_p = true;
5344 /* If the variable has an array type, lay out the type, even if
5345 there is no initializer. It is valid to index through the
5346 array, and we must get TYPE_ALIGN set correctly on the array
5348 else if (TREE_CODE (type) == ARRAY_TYPE)
5352 /* Add this declaration to the statement-tree. This needs to happen
5353 after the call to check_initializer so that the DECL_EXPR for a
5354 reference temp is added before the DECL_EXPR for the reference itself. */
5355 if (at_function_scope_p ())
5356 add_decl_expr (decl);
5358 /* Let the middle end know about variables and functions -- but not
5359 static data members in uninstantiated class templates. */
5360 if (!saved_processing_template_decl
5361 && (TREE_CODE (decl) == VAR_DECL
5362 || TREE_CODE (decl) == FUNCTION_DECL))
5364 if (TREE_CODE (decl) == VAR_DECL)
5366 layout_var_decl (decl);
5367 maybe_commonize_var (decl);
5370 make_rtl_for_nonlocal_decl (decl, init, asmspec);
5372 /* Check for abstractness of the type. Notice that there is no
5373 need to strip array types here since the check for those types
5374 is already done within create_array_type_for_decl. */
5375 if (TREE_CODE (type) == FUNCTION_TYPE
5376 || TREE_CODE (type) == METHOD_TYPE)
5377 abstract_virtuals_error (decl, TREE_TYPE (type));
5379 abstract_virtuals_error (decl, type);
5381 /* This needs to happen after the linkage is set. */
5382 determine_visibility (decl);
5384 if (TREE_CODE (decl) == FUNCTION_DECL
5385 || TREE_TYPE (decl) == error_mark_node)
5386 /* No initialization required. */
5388 else if (DECL_EXTERNAL (decl)
5389 && ! (DECL_LANG_SPECIFIC (decl)
5390 && DECL_NOT_REALLY_EXTERN (decl)))
5393 DECL_INITIAL (decl) = init;
5397 /* A variable definition. */
5398 if (DECL_FUNCTION_SCOPE_P (decl))
5400 /* Initialize the local variable. */
5401 if (processing_template_decl)
5402 DECL_INITIAL (decl) = init;
5403 else if (!TREE_STATIC (decl))
5404 initialize_local_var (decl, init);
5407 /* If a variable is defined, and then a subsequent
5408 definition with external linkage is encountered, we will
5409 get here twice for the same variable. We want to avoid
5410 calling expand_static_init more than once. For variables
5411 that are not static data members, we can call
5412 expand_static_init only when we actually process the
5413 initializer. It is not legal to redeclare a static data
5414 member, so this issue does not arise in that case. */
5415 if (var_definition_p && TREE_STATIC (decl))
5417 /* If a TREE_READONLY variable needs initialization
5418 at runtime, it is no longer readonly and we need to
5419 avoid MEM_READONLY_P being set on RTL created for it. */
5422 if (TREE_READONLY (decl))
5423 TREE_READONLY (decl) = 0;
5426 expand_static_init (decl, init);
5431 /* If a CLEANUP_STMT was created to destroy a temporary bound to a
5432 reference, insert it in the statement-tree now. */
5434 push_cleanup (decl, cleanup, false);
5437 processing_template_decl = saved_processing_template_decl;
5440 TREE_READONLY (decl) = 1;
5442 /* If this was marked 'used', be sure it will be output. */
5443 if (lookup_attribute ("used", DECL_ATTRIBUTES (decl)))
5444 mark_decl_referenced (decl);
5447 /* This is here for a midend callback from c-common.c. */
5450 finish_decl (tree decl, tree init, tree asmspec_tree)
5452 cp_finish_decl (decl, init, /*init_const_expr_p=*/false, asmspec_tree, 0);
5455 /* Returns a declaration for a VAR_DECL as if:
5457 extern "C" TYPE NAME;
5459 had been seen. Used to create compiler-generated global
5463 declare_global_var (tree name, tree type)
5467 push_to_top_level ();
5468 decl = build_decl (VAR_DECL, name, type);
5469 TREE_PUBLIC (decl) = 1;
5470 DECL_EXTERNAL (decl) = 1;
5471 DECL_ARTIFICIAL (decl) = 1;
5472 /* If the user has explicitly declared this variable (perhaps
5473 because the code we are compiling is part of a low-level runtime
5474 library), then it is possible that our declaration will be merged
5475 with theirs by pushdecl. */
5476 decl = pushdecl (decl);
5477 finish_decl (decl, NULL_TREE, NULL_TREE);
5478 pop_from_top_level ();
5483 /* Returns a pointer to the `atexit' function. Note that if
5484 FLAG_USE_CXA_ATEXIT is nonzero, then this will actually be the new
5485 `__cxa_atexit' function specified in the IA64 C++ ABI. */
5488 get_atexit_node (void)
5495 bool use_aeabi_atexit;
5500 if (flag_use_cxa_atexit)
5502 /* The declaration for `__cxa_atexit' is:
5504 int __cxa_atexit (void (*)(void *), void *, void *)
5506 We build up the argument types and then then function type
5509 use_aeabi_atexit = targetm.cxx.use_aeabi_atexit ();
5510 /* First, build the pointer-to-function type for the first
5512 arg_types = tree_cons (NULL_TREE, ptr_type_node, void_list_node);
5513 fn_type = build_function_type (void_type_node, arg_types);
5514 fn_ptr_type = build_pointer_type (fn_type);
5515 /* Then, build the rest of the argument types. */
5516 arg_types = tree_cons (NULL_TREE, ptr_type_node, void_list_node);
5517 if (use_aeabi_atexit)
5519 arg_types = tree_cons (NULL_TREE, fn_ptr_type, arg_types);
5520 arg_types = tree_cons (NULL_TREE, ptr_type_node, arg_types);
5524 arg_types = tree_cons (NULL_TREE, ptr_type_node, arg_types);
5525 arg_types = tree_cons (NULL_TREE, fn_ptr_type, arg_types);
5527 /* And the final __cxa_atexit type. */
5528 fn_type = build_function_type (integer_type_node, arg_types);
5529 fn_ptr_type = build_pointer_type (fn_type);
5530 if (use_aeabi_atexit)
5531 name = "__aeabi_atexit";
5533 name = "__cxa_atexit";
5537 /* The declaration for `atexit' is:
5539 int atexit (void (*)());
5541 We build up the argument types and then then function type
5543 fn_type = build_function_type (void_type_node, void_list_node);
5544 fn_ptr_type = build_pointer_type (fn_type);
5545 arg_types = tree_cons (NULL_TREE, fn_ptr_type, void_list_node);
5546 /* Build the final atexit type. */
5547 fn_type = build_function_type (integer_type_node, arg_types);
5551 /* Now, build the function declaration. */
5552 push_lang_context (lang_name_c);
5553 atexit_fndecl = build_library_fn_ptr (name, fn_type);
5554 mark_used (atexit_fndecl);
5555 pop_lang_context ();
5556 atexit_node = decay_conversion (atexit_fndecl);
5561 /* Returns the __dso_handle VAR_DECL. */
5564 get_dso_handle_node (void)
5566 if (dso_handle_node)
5567 return dso_handle_node;
5569 /* Declare the variable. */
5570 dso_handle_node = declare_global_var (get_identifier ("__dso_handle"),
5573 return dso_handle_node;
5576 /* Begin a new function with internal linkage whose job will be simply
5577 to destroy some particular variable. */
5579 static GTY(()) int start_cleanup_cnt;
5582 start_cleanup_fn (void)
5589 push_to_top_level ();
5591 /* No need to mangle this. */
5592 push_lang_context (lang_name_c);
5594 /* Build the parameter-types. */
5595 parmtypes = void_list_node;
5596 /* Functions passed to __cxa_atexit take an additional parameter.
5597 We'll just ignore it. After we implement the new calling
5598 convention for destructors, we can eliminate the use of
5599 additional cleanup functions entirely in the -fnew-abi case. */
5600 if (flag_use_cxa_atexit)
5601 parmtypes = tree_cons (NULL_TREE, ptr_type_node, parmtypes);
5602 /* Build the function type itself. */
5603 fntype = build_function_type (void_type_node, parmtypes);
5604 /* Build the name of the function. */
5605 sprintf (name, "__tcf_%d", start_cleanup_cnt++);
5606 /* Build the function declaration. */
5607 fndecl = build_lang_decl (FUNCTION_DECL, get_identifier (name), fntype);
5608 /* It's a function with internal linkage, generated by the
5610 TREE_PUBLIC (fndecl) = 0;
5611 DECL_ARTIFICIAL (fndecl) = 1;
5612 /* Make the function `inline' so that it is only emitted if it is
5613 actually needed. It is unlikely that it will be inlined, since
5614 it is only called via a function pointer, but we avoid unnecessary
5615 emissions this way. */
5616 DECL_INLINE (fndecl) = 1;
5617 DECL_DECLARED_INLINE_P (fndecl) = 1;
5618 DECL_INTERFACE_KNOWN (fndecl) = 1;
5619 /* Build the parameter. */
5620 if (flag_use_cxa_atexit)
5624 parmdecl = cp_build_parm_decl (NULL_TREE, ptr_type_node);
5625 DECL_CONTEXT (parmdecl) = fndecl;
5626 TREE_USED (parmdecl) = 1;
5627 DECL_ARGUMENTS (fndecl) = parmdecl;
5631 start_preparsed_function (fndecl, NULL_TREE, SF_PRE_PARSED);
5633 pop_lang_context ();
5635 return current_function_decl;
5638 /* Finish the cleanup function begun by start_cleanup_fn. */
5641 end_cleanup_fn (void)
5643 expand_or_defer_fn (finish_function (0));
5645 pop_from_top_level ();
5648 /* Generate code to handle the destruction of DECL, an object with
5649 static storage duration. */
5652 register_dtor_fn (tree decl)
5659 if (TYPE_HAS_TRIVIAL_DESTRUCTOR (TREE_TYPE (decl)))
5660 return void_zero_node;
5662 /* Call build_cleanup before we enter the anonymous function so that
5663 any access checks will be done relative to the current scope,
5664 rather than the scope of the anonymous function. */
5665 build_cleanup (decl);
5667 /* Now start the function. */
5668 cleanup = start_cleanup_fn ();
5670 /* Now, recompute the cleanup. It may contain SAVE_EXPRs that refer
5671 to the original function, rather than the anonymous one. That
5672 will make the back-end think that nested functions are in use,
5673 which causes confusion. */
5675 push_deferring_access_checks (dk_no_check);
5676 fcall = build_cleanup (decl);
5677 pop_deferring_access_checks ();
5679 /* Create the body of the anonymous function. */
5680 compound_stmt = begin_compound_stmt (BCS_FN_BODY);
5681 finish_expr_stmt (fcall);
5682 finish_compound_stmt (compound_stmt);
5685 /* Call atexit with the cleanup function. */
5686 cxx_mark_addressable (cleanup);
5687 mark_used (cleanup);
5688 cleanup = build_unary_op (ADDR_EXPR, cleanup, 0);
5689 if (flag_use_cxa_atexit)
5691 args = tree_cons (NULL_TREE,
5692 build_unary_op (ADDR_EXPR, get_dso_handle_node (), 0),
5694 if (targetm.cxx.use_aeabi_atexit ())
5696 args = tree_cons (NULL_TREE, cleanup, args);
5697 args = tree_cons (NULL_TREE, null_pointer_node, args);
5701 args = tree_cons (NULL_TREE, null_pointer_node, args);
5702 args = tree_cons (NULL_TREE, cleanup, args);
5706 args = tree_cons (NULL_TREE, cleanup, NULL_TREE);
5707 return build_function_call (get_atexit_node (), args);
5710 /* DECL is a VAR_DECL with static storage duration. INIT, if present,
5711 is its initializer. Generate code to handle the construction
5712 and destruction of DECL. */
5715 expand_static_init (tree decl, tree init)
5717 gcc_assert (TREE_CODE (decl) == VAR_DECL);
5718 gcc_assert (TREE_STATIC (decl));
5720 /* Some variables require no initialization. */
5722 && !TYPE_NEEDS_CONSTRUCTING (TREE_TYPE (decl))
5723 && TYPE_HAS_TRIVIAL_DESTRUCTOR (TREE_TYPE (decl)))
5726 if (DECL_FUNCTION_SCOPE_P (decl))
5728 /* Emit code to perform this initialization but once. */
5729 tree if_stmt = NULL_TREE, inner_if_stmt = NULL_TREE;
5730 tree then_clause = NULL_TREE, inner_then_clause = NULL_TREE;
5731 tree guard, guard_addr, guard_addr_list;
5732 tree acquire_fn, release_fn, abort_fn;
5735 /* Emit code to perform this initialization but once. This code
5738 static <type> guard;
5739 if (!guard.first_byte) {
5740 if (__cxa_guard_acquire (&guard)) {
5743 // Do initialization.
5744 flag = true; __cxa_guard_release (&guard);
5745 // Register variable for destruction at end of program.
5747 if (!flag) __cxa_guard_abort (&guard);
5751 Note that the `flag' variable is only set to 1 *after* the
5752 initialization is complete. This ensures that an exception,
5753 thrown during the construction, will cause the variable to
5754 reinitialized when we pass through this code again, as per:
5758 If the initialization exits by throwing an exception, the
5759 initialization is not complete, so it will be tried again
5760 the next time control enters the declaration.
5762 This process should be thread-safe, too; multiple threads
5763 should not be able to initialize the variable more than
5766 /* Create the guard variable. */
5767 guard = get_guard (decl);
5769 /* This optimization isn't safe on targets with relaxed memory
5770 consistency. On such targets we force synchronization in
5771 __cxa_guard_acquire. */
5772 if (!targetm.relaxed_ordering || !flag_threadsafe_statics)
5774 /* Begin the conditional initialization. */
5775 if_stmt = begin_if_stmt ();
5776 finish_if_stmt_cond (get_guard_cond (guard), if_stmt);
5777 then_clause = begin_compound_stmt (BCS_NO_SCOPE);
5780 if (flag_threadsafe_statics)
5782 guard_addr = build_address (guard);
5783 guard_addr_list = build_tree_list (NULL_TREE, guard_addr);
5785 acquire_fn = get_identifier ("__cxa_guard_acquire");
5786 release_fn = get_identifier ("__cxa_guard_release");
5787 abort_fn = get_identifier ("__cxa_guard_abort");
5788 if (!get_global_value_if_present (acquire_fn, &acquire_fn))
5790 tree argtypes = tree_cons (NULL_TREE, TREE_TYPE (guard_addr),
5792 tree vfntype = build_function_type (void_type_node, argtypes);
5793 acquire_fn = push_library_fn
5794 (acquire_fn, build_function_type (integer_type_node, argtypes));
5795 release_fn = push_library_fn (release_fn, vfntype);
5796 abort_fn = push_library_fn (abort_fn, vfntype);
5800 release_fn = identifier_global_value (release_fn);
5801 abort_fn = identifier_global_value (abort_fn);
5804 inner_if_stmt = begin_if_stmt ();
5805 finish_if_stmt_cond (build_call (acquire_fn, guard_addr_list),
5808 inner_then_clause = begin_compound_stmt (BCS_NO_SCOPE);
5809 begin = get_target_expr (boolean_false_node);
5810 flag = TARGET_EXPR_SLOT (begin);
5812 TARGET_EXPR_CLEANUP (begin)
5813 = build3 (COND_EXPR, void_type_node, flag,
5815 build_call (abort_fn, guard_addr_list));
5816 CLEANUP_EH_ONLY (begin) = 1;
5818 /* Do the initialization itself. */
5819 init = add_stmt_to_compound (begin, init);
5820 init = add_stmt_to_compound
5821 (init, build2 (MODIFY_EXPR, void_type_node, flag, boolean_true_node));
5822 init = add_stmt_to_compound
5823 (init, build_call (release_fn, guard_addr_list));
5826 init = add_stmt_to_compound (init, set_guard (guard));
5828 /* Use atexit to register a function for destroying this static
5830 init = add_stmt_to_compound (init, register_dtor_fn (decl));
5832 finish_expr_stmt (init);
5834 if (flag_threadsafe_statics)
5836 finish_compound_stmt (inner_then_clause);
5837 finish_then_clause (inner_if_stmt);
5838 finish_if_stmt (inner_if_stmt);
5841 if (!targetm.relaxed_ordering || !flag_threadsafe_statics)
5843 finish_compound_stmt (then_clause);
5844 finish_then_clause (if_stmt);
5845 finish_if_stmt (if_stmt);
5849 static_aggregates = tree_cons (init, decl, static_aggregates);
5853 /* Make TYPE a complete type based on INITIAL_VALUE.
5854 Return 0 if successful, 1 if INITIAL_VALUE can't be deciphered,
5855 2 if there was no information (in which case assume 0 if DO_DEFAULT),
5856 3 if the initializer list is empty (in pedantic mode). */
5859 cp_complete_array_type (tree *ptype, tree initial_value, bool do_default)
5862 tree type, elt_type;
5866 /* An array of character type can be initialized from a
5867 brace-enclosed string constant.
5869 FIXME: this code is duplicated from reshape_init. Probably
5870 we should just call reshape_init here? */
5871 if (char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (*ptype)))
5872 && TREE_CODE (initial_value) == CONSTRUCTOR
5873 && !VEC_empty (constructor_elt, CONSTRUCTOR_ELTS (initial_value)))
5875 VEC(constructor_elt,gc) *v = CONSTRUCTOR_ELTS (initial_value);
5876 tree value = VEC_index (constructor_elt, v, 0)->value;
5878 if (TREE_CODE (value) == STRING_CST
5879 && VEC_length (constructor_elt, v) == 1)
5880 initial_value = value;
5884 failure = complete_array_type (ptype, initial_value, do_default);
5886 /* We can create the array before the element type is complete, which
5887 means that we didn't have these two bits set in the original type
5888 either. In completing the type, we are expected to propagate these
5889 bits. See also complete_type which does the same thing for arrays
5892 if (TYPE_DOMAIN (type))
5894 elt_type = TREE_TYPE (type);
5895 TYPE_NEEDS_CONSTRUCTING (type) = TYPE_NEEDS_CONSTRUCTING (elt_type);
5896 TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type)
5897 = TYPE_HAS_NONTRIVIAL_DESTRUCTOR (elt_type);
5903 /* Return zero if something is declared to be a member of type
5904 CTYPE when in the context of CUR_TYPE. STRING is the error
5905 message to print in that case. Otherwise, quietly return 1. */
5908 member_function_or_else (tree ctype, tree cur_type, enum overload_flags flags)
5910 if (ctype && ctype != cur_type)
5912 if (flags == DTOR_FLAG)
5913 error ("destructor for alien class %qT cannot be a member", ctype);
5915 error ("constructor for alien class %qT cannot be a member", ctype);
5921 /* Subroutine of `grokdeclarator'. */
5923 /* Generate errors possibly applicable for a given set of specifiers.
5924 This is for ARM $7.1.2. */
5927 bad_specifiers (tree object,
5936 error ("%qD declared as a %<virtual%> %s", object, type);
5938 error ("%qD declared as an %<inline%> %s", object, type);
5940 error ("%<const%> and %<volatile%> function specifiers on "
5941 "%qD invalid in %s declaration",
5944 error ("%q+D declared as a friend", object);
5946 && (TREE_CODE (object) == TYPE_DECL
5947 || (!TYPE_PTRFN_P (TREE_TYPE (object))
5948 && !TYPE_REFFN_P (TREE_TYPE (object))
5949 && !TYPE_PTRMEMFUNC_P (TREE_TYPE (object)))))
5950 error ("%q+D declared with an exception specification", object);
5953 /* DECL is a member function or static data member and is presently
5954 being defined. Check that the definition is taking place in a
5958 check_class_member_definition_namespace (tree decl)
5960 /* These checks only apply to member functions and static data
5962 gcc_assert (TREE_CODE (decl) == FUNCTION_DECL
5963 || TREE_CODE (decl) == VAR_DECL);
5964 /* We check for problems with specializations in pt.c in
5965 check_specialization_namespace, where we can issue better
5967 if (processing_specialization)
5969 /* There are no restrictions on the placement of
5970 explicit instantiations. */
5971 if (processing_explicit_instantiation)
5975 A member function definition that appears outside of the
5976 class definition shall appear in a namespace scope enclosing
5977 the class definition.
5981 The definition for a static data member shall appear in a
5982 namespace scope enclosing the member's class definition. */
5983 if (!is_ancestor (current_namespace, DECL_CONTEXT (decl)))
5984 pedwarn ("definition of %qD is not in namespace enclosing %qT",
5985 decl, DECL_CONTEXT (decl));
5988 /* Build a PARM_DECL for the "this" parameter. TYPE is the
5989 METHOD_TYPE for a non-static member function; QUALS are the
5990 cv-qualifiers that apply to the function. */
5993 build_this_parm (tree type, cp_cv_quals quals)
5998 cp_cv_quals this_quals;
6000 this_type = TREE_VALUE (TYPE_ARG_TYPES (type));
6001 /* The `this' parameter is implicitly `const'; it cannot be
6003 this_quals = (quals & TYPE_QUAL_RESTRICT) | TYPE_QUAL_CONST;
6004 qual_type = cp_build_qualified_type (this_type, this_quals);
6005 parm = build_artificial_parm (this_identifier, qual_type);
6006 cp_apply_type_quals_to_decl (this_quals, parm);
6010 /* CTYPE is class type, or null if non-class.
6011 TYPE is type this FUNCTION_DECL should have, either FUNCTION_TYPE
6013 DECLARATOR is the function's name.
6014 PARMS is a chain of PARM_DECLs for the function.
6015 VIRTUALP is truthvalue of whether the function is virtual or not.
6016 FLAGS are to be passed through to `grokclassfn'.
6017 QUALS are qualifiers indicating whether the function is `const'
6019 RAISES is a list of exceptions that this function can raise.
6020 CHECK is 1 if we must find this method in CTYPE, 0 if we should
6021 not look, and -1 if we should not call `grokclassfn' at all.
6023 SFK is the kind of special function (if any) for the new function.
6025 Returns `NULL_TREE' if something goes wrong, after issuing
6026 applicable error messages. */
6029 grokfndecl (tree ctype,
6033 tree orig_declarator,
6035 enum overload_flags flags,
6042 special_function_kind sfk,
6049 int staticp = ctype && TREE_CODE (type) == FUNCTION_TYPE;
6053 type = build_exception_variant (type, raises);
6055 decl = build_lang_decl (FUNCTION_DECL, declarator, type);
6056 if (TREE_CODE (type) == METHOD_TYPE)
6059 parm = build_this_parm (type, quals);
6060 TREE_CHAIN (parm) = parms;
6063 DECL_ARGUMENTS (decl) = parms;
6064 /* Propagate volatile out from type to decl. */
6065 if (TYPE_VOLATILE (type))
6066 TREE_THIS_VOLATILE (decl) = 1;
6069 && TREE_CODE (orig_declarator) == TEMPLATE_ID_EXPR)
6073 ("defining explicit specialization %qD in friend declaration",
6077 tree fns = TREE_OPERAND (orig_declarator, 0);
6078 tree args = TREE_OPERAND (orig_declarator, 1);
6080 if (PROCESSING_REAL_TEMPLATE_DECL_P ())
6082 /* Something like `template <class T> friend void f<T>()'. */
6083 error ("invalid use of template-id %qD in declaration "
6084 "of primary template",
6090 /* A friend declaration of the form friend void f<>(). Record
6091 the information in the TEMPLATE_ID_EXPR. */
6092 SET_DECL_IMPLICIT_INSTANTIATION (decl);
6094 if (TREE_CODE (fns) == COMPONENT_REF)
6096 /* Due to bison parser ickiness, we will have already looked
6097 up an operator_name or PFUNCNAME within the current class
6098 (see template_id in parse.y). If the current class contains
6099 such a name, we'll get a COMPONENT_REF here. Undo that. */
6101 gcc_assert (TREE_TYPE (TREE_OPERAND (fns, 0))
6102 == current_class_type);
6103 fns = TREE_OPERAND (fns, 1);
6105 gcc_assert (TREE_CODE (fns) == IDENTIFIER_NODE
6106 || TREE_CODE (fns) == OVERLOAD);
6107 DECL_TEMPLATE_INFO (decl) = tree_cons (fns, args, NULL_TREE);
6109 for (t = TYPE_ARG_TYPES (TREE_TYPE (decl)); t; t = TREE_CHAIN (t))
6110 if (TREE_PURPOSE (t)
6111 && TREE_CODE (TREE_PURPOSE (t)) == DEFAULT_ARG)
6113 error ("default arguments are not allowed in declaration "
6114 "of friend template specialization %qD",
6121 error ("%<inline%> is not allowed in declaration of friend "
6122 "template specialization %qD",
6129 /* If this decl has namespace scope, set that up. */
6131 set_decl_namespace (decl, in_namespace, friendp);
6133 DECL_CONTEXT (decl) = FROB_CONTEXT (current_namespace);
6135 /* `main' and builtins have implicit 'C' linkage. */
6136 if ((MAIN_NAME_P (declarator)
6137 || (IDENTIFIER_LENGTH (declarator) > 10
6138 && IDENTIFIER_POINTER (declarator)[0] == '_'
6139 && IDENTIFIER_POINTER (declarator)[1] == '_'
6140 && strncmp (IDENTIFIER_POINTER (declarator)+2, "builtin_", 8) == 0))
6141 && current_lang_name == lang_name_cplusplus
6142 && ctype == NULL_TREE
6143 /* NULL_TREE means global namespace. */
6144 && DECL_CONTEXT (decl) == NULL_TREE)
6145 SET_DECL_LANGUAGE (decl, lang_c);
6147 /* Should probably propagate const out from type to decl I bet (mrs). */
6150 DECL_STATIC_FUNCTION_P (decl) = 1;
6151 DECL_CONTEXT (decl) = ctype;
6156 DECL_CONTEXT (decl) = ctype;
6158 check_class_member_definition_namespace (decl);
6161 if (ctype == NULL_TREE && DECL_MAIN_P (decl))
6163 if (processing_template_decl)
6164 error ("cannot declare %<::main%> to be a template");
6166 error ("cannot declare %<::main%> to be inline");
6168 error ("cannot declare %<::main%> to be static");
6173 /* Members of anonymous types and local classes have no linkage; make
6174 them internal. If a typedef is made later, this will be changed. */
6175 if (ctype && (TYPE_ANONYMOUS_P (ctype)
6176 || decl_function_context (TYPE_MAIN_DECL (ctype))))
6181 /* [basic.link]: A name with no linkage (notably, the name of a class
6182 or enumeration declared in a local scope) shall not be used to
6183 declare an entity with linkage.
6185 Only check this for public decls for now. See core 319, 389. */
6186 t = no_linkage_check (TREE_TYPE (decl),
6187 /*relaxed_p=*/false);
6190 if (TYPE_ANONYMOUS_P (t))
6192 if (DECL_EXTERN_C_P (decl))
6193 /* Allow this; it's pretty common in C. */;
6196 pedwarn ("non-local function %q#D uses anonymous type",
6198 if (DECL_ORIGINAL_TYPE (TYPE_NAME (t)))
6199 pedwarn ("%q+#D does not refer to the unqualified "
6200 "type, so it is not used for linkage",
6205 pedwarn ("non-local function %q#D uses local type %qT", decl, t);
6209 TREE_PUBLIC (decl) = publicp;
6212 DECL_INTERFACE_KNOWN (decl) = 1;
6213 DECL_NOT_REALLY_EXTERN (decl) = 1;
6216 /* If the declaration was declared inline, mark it as such. */
6218 DECL_DECLARED_INLINE_P (decl) = 1;
6219 /* We inline functions that are explicitly declared inline, or, when
6220 the user explicitly asks us to, all functions. */
6221 if (DECL_DECLARED_INLINE_P (decl)
6222 || (flag_inline_trees == 2 && !DECL_INLINE (decl) && funcdef_flag))
6223 DECL_INLINE (decl) = 1;
6225 DECL_EXTERNAL (decl) = 1;
6226 if (quals && TREE_CODE (type) == FUNCTION_TYPE)
6228 error ("%smember function %qD cannot have cv-qualifier",
6229 (ctype ? "static " : "non-"), decl);
6230 quals = TYPE_UNQUALIFIED;
6233 if (IDENTIFIER_OPNAME_P (DECL_NAME (decl))
6234 && !grok_op_properties (decl, /*complain=*/true))
6237 if (ctype && decl_function_context (decl))
6238 DECL_NO_STATIC_CHAIN (decl) = 1;
6241 /* Make the init_value nonzero so pushdecl knows this is not
6242 tentative. error_mark_node is replaced later with the BLOCK. */
6243 DECL_INITIAL (decl) = error_mark_node;
6245 if (TYPE_NOTHROW_P (type) || nothrow_libfn_p (decl))
6246 TREE_NOTHROW (decl) = 1;
6248 /* Caller will do the rest of this. */
6252 if (ctype != NULL_TREE)
6254 if (sfk == sfk_constructor)
6255 DECL_CONSTRUCTOR_P (decl) = 1;
6257 grokclassfn (ctype, decl, flags);
6260 decl = check_explicit_specialization (orig_declarator, decl,
6263 4 * (friendp != 0));
6264 if (decl == error_mark_node)
6269 cplus_decl_attributes (&decl, *attrlist, 0);
6270 *attrlist = NULL_TREE;
6273 /* Check main's type after attributes have been applied. */
6274 if (ctype == NULL_TREE && DECL_MAIN_P (decl)
6275 && !same_type_p (TREE_TYPE (TREE_TYPE (decl)),
6278 tree oldtypeargs = TYPE_ARG_TYPES (TREE_TYPE (decl));
6280 error ("%<::main%> must return %<int%>");
6281 newtype = build_function_type (integer_type_node, oldtypeargs);
6282 TREE_TYPE (decl) = newtype;
6285 if (ctype != NULL_TREE
6286 && (! TYPE_FOR_JAVA (ctype) || check_java_method (decl))
6291 old_decl = check_classfn (ctype, decl,
6292 (processing_template_decl
6293 > template_class_depth (ctype))
6294 ? current_template_parms
6301 if (TREE_CODE (old_decl) == TEMPLATE_DECL)
6302 /* Because grokfndecl is always supposed to return a
6303 FUNCTION_DECL, we pull out the DECL_TEMPLATE_RESULT
6304 here. We depend on our callers to figure out that its
6305 really a template that's being returned. */
6306 old_decl = DECL_TEMPLATE_RESULT (old_decl);
6308 if (DECL_STATIC_FUNCTION_P (old_decl)
6309 && TREE_CODE (TREE_TYPE (decl)) == METHOD_TYPE)
6310 /* Remove the `this' parm added by grokclassfn.
6311 XXX Isn't this done in start_function, too? */
6312 revert_static_member_fn (decl);
6313 if (DECL_ARTIFICIAL (old_decl))
6314 error ("definition of implicitly-declared %qD", old_decl);
6316 /* Since we've smashed OLD_DECL to its
6317 DECL_TEMPLATE_RESULT, we must do the same to DECL. */
6318 if (TREE_CODE (decl) == TEMPLATE_DECL)
6319 decl = DECL_TEMPLATE_RESULT (decl);
6321 /* Attempt to merge the declarations. This can fail, in
6322 the case of some invalid specialization declarations. */
6323 pushed_scope = push_scope (ctype);
6324 ok = duplicate_decls (decl, old_decl, friendp);
6326 pop_scope (pushed_scope);
6329 error ("no %q#D member function declared in class %qT",
6337 if (DECL_CONSTRUCTOR_P (decl) && !grok_ctor_properties (ctype, decl))
6340 if (ctype == NULL_TREE || check)
6344 DECL_VIRTUAL_P (decl) = 1;
6349 /* DECL is a VAR_DECL for a static data member. Set flags to reflect
6350 the linkage that DECL will receive in the object file. */
6353 set_linkage_for_static_data_member (tree decl)
6355 /* A static data member always has static storage duration and
6356 external linkage. Note that static data members are forbidden in
6357 local classes -- the only situation in which a class has
6358 non-external linkage. */
6359 TREE_PUBLIC (decl) = 1;
6360 TREE_STATIC (decl) = 1;
6361 /* For non-template classes, static data members are always put
6362 out in exactly those files where they are defined, just as
6363 with ordinary namespace-scope variables. */
6364 if (!processing_template_decl)
6365 DECL_INTERFACE_KNOWN (decl) = 1;
6368 /* Create a VAR_DECL named NAME with the indicated TYPE.
6370 If SCOPE is non-NULL, it is the class type or namespace containing
6371 the variable. If SCOPE is NULL, the variable should is created in
6372 the innermost enclosings scope. */
6375 grokvardecl (tree type,
6377 const cp_decl_specifier_seq *declspecs,
6383 tree explicit_scope;
6385 gcc_assert (!name || TREE_CODE (name) == IDENTIFIER_NODE);
6387 /* Compute the scope in which to place the variable, but remember
6388 whether or not that scope was explicitly specified by the user. */
6389 explicit_scope = scope;
6392 /* An explicit "extern" specifier indicates a namespace-scope
6394 if (declspecs->storage_class == sc_extern)
6395 scope = current_namespace;
6396 else if (!at_function_scope_p ())
6397 scope = current_scope ();
6401 && (/* If the variable is a namespace-scope variable declared in a
6402 template, we need DECL_LANG_SPECIFIC. */
6403 (TREE_CODE (scope) == NAMESPACE_DECL && processing_template_decl)
6404 /* Similarly for namespace-scope variables with language linkage
6406 || (TREE_CODE (scope) == NAMESPACE_DECL
6407 && current_lang_name != lang_name_cplusplus)
6408 /* Similarly for static data members. */
6410 decl = build_lang_decl (VAR_DECL, name, type);
6412 decl = build_decl (VAR_DECL, name, type);
6414 if (explicit_scope && TREE_CODE (explicit_scope) == NAMESPACE_DECL)
6415 set_decl_namespace (decl, explicit_scope, 0);
6417 DECL_CONTEXT (decl) = FROB_CONTEXT (scope);
6419 if (declspecs->storage_class == sc_extern)
6421 DECL_THIS_EXTERN (decl) = 1;
6422 DECL_EXTERNAL (decl) = !initialized;
6425 if (DECL_CLASS_SCOPE_P (decl))
6427 set_linkage_for_static_data_member (decl);
6428 /* This function is only called with out-of-class definitions. */
6429 DECL_EXTERNAL (decl) = 0;
6430 check_class_member_definition_namespace (decl);
6432 /* At top level, either `static' or no s.c. makes a definition
6433 (perhaps tentative), and absence of `static' makes it public. */
6434 else if (toplevel_bindings_p ())
6436 TREE_PUBLIC (decl) = (declspecs->storage_class != sc_static
6437 && (DECL_THIS_EXTERN (decl) || ! constp));
6438 TREE_STATIC (decl) = ! DECL_EXTERNAL (decl);
6440 /* Not at top level, only `static' makes a static definition. */
6443 TREE_STATIC (decl) = declspecs->storage_class == sc_static;
6444 TREE_PUBLIC (decl) = DECL_EXTERNAL (decl);
6447 if (declspecs->specs[(int)ds_thread])
6449 if (targetm.have_tls)
6450 DECL_TLS_MODEL (decl) = decl_default_tls_model (decl);
6452 /* A mere warning is sure to result in improper semantics
6453 at runtime. Don't bother to allow this to compile. */
6454 error ("thread-local storage not supported for this target");
6457 if (TREE_PUBLIC (decl))
6459 /* [basic.link]: A name with no linkage (notably, the name of a class
6460 or enumeration declared in a local scope) shall not be used to
6461 declare an entity with linkage.
6463 Only check this for public decls for now. */
6464 tree t = no_linkage_check (TREE_TYPE (decl), /*relaxed_p=*/false);
6467 if (TYPE_ANONYMOUS_P (t))
6469 if (DECL_EXTERN_C_P (decl))
6470 /* Allow this; it's pretty common in C. */
6474 /* DRs 132, 319 and 389 seem to indicate types with
6475 no linkage can only be used to declare extern "C"
6476 entities. Since it's not always an error in the
6477 ISO C++ 90 Standard, we only issue a warning. */
6478 warning (0, "non-local variable %q#D uses anonymous type",
6480 if (DECL_ORIGINAL_TYPE (TYPE_NAME (t)))
6481 warning (0, "%q+#D does not refer to the unqualified "
6482 "type, so it is not used for linkage",
6487 warning (0, "non-local variable %q#D uses local type %qT", decl, t);
6491 DECL_INTERFACE_KNOWN (decl) = 1;
6496 /* Create and return a canonical pointer to member function type, for
6497 TYPE, which is a POINTER_TYPE to a METHOD_TYPE. */
6500 build_ptrmemfunc_type (tree type)
6504 tree unqualified_variant = NULL_TREE;
6506 if (type == error_mark_node)
6509 /* If a canonical type already exists for this type, use it. We use
6510 this method instead of type_hash_canon, because it only does a
6511 simple equality check on the list of field members. */
6513 if ((t = TYPE_GET_PTRMEMFUNC_TYPE (type)))
6516 /* Make sure that we always have the unqualified pointer-to-member
6518 if (cp_type_quals (type) != TYPE_UNQUALIFIED)
6520 = build_ptrmemfunc_type (TYPE_MAIN_VARIANT (type));
6522 t = make_aggr_type (RECORD_TYPE);
6523 xref_basetypes (t, NULL_TREE);
6525 /* Let the front-end know this is a pointer to member function... */
6526 TYPE_PTRMEMFUNC_FLAG (t) = 1;
6527 /* ... and not really an aggregate. */
6528 SET_IS_AGGR_TYPE (t, 0);
6530 field = build_decl (FIELD_DECL, pfn_identifier, type);
6533 field = build_decl (FIELD_DECL, delta_identifier, delta_type_node);
6534 TREE_CHAIN (field) = fields;
6537 finish_builtin_struct (t, "__ptrmemfunc_type", fields, ptr_type_node);
6539 /* Zap out the name so that the back-end will give us the debugging
6540 information for this anonymous RECORD_TYPE. */
6541 TYPE_NAME (t) = NULL_TREE;
6543 /* If this is not the unqualified form of this pointer-to-member
6544 type, set the TYPE_MAIN_VARIANT for this type to be the
6545 unqualified type. Since they are actually RECORD_TYPEs that are
6546 not variants of each other, we must do this manually. */
6547 if (cp_type_quals (type) != TYPE_UNQUALIFIED)
6549 t = build_qualified_type (t, cp_type_quals (type));
6550 TYPE_MAIN_VARIANT (t) = unqualified_variant;
6551 TYPE_NEXT_VARIANT (t) = TYPE_NEXT_VARIANT (unqualified_variant);
6552 TYPE_NEXT_VARIANT (unqualified_variant) = t;
6555 /* Cache this pointer-to-member type so that we can find it again
6557 TYPE_SET_PTRMEMFUNC_TYPE (type, t);
6562 /* Create and return a pointer to data member type. */
6565 build_ptrmem_type (tree class_type, tree member_type)
6567 if (TREE_CODE (member_type) == METHOD_TYPE)
6571 arg_types = TYPE_ARG_TYPES (member_type);
6572 class_type = (cp_build_qualified_type
6574 cp_type_quals (TREE_TYPE (TREE_VALUE (arg_types)))));
6576 = build_method_type_directly (class_type,
6577 TREE_TYPE (member_type),
6578 TREE_CHAIN (arg_types));
6579 return build_ptrmemfunc_type (build_pointer_type (member_type));
6583 gcc_assert (TREE_CODE (member_type) != FUNCTION_TYPE);
6584 return build_offset_type (class_type, member_type);
6588 /* DECL is a VAR_DECL defined in-class, whose TYPE is also given.
6589 Check to see that the definition is valid. Issue appropriate error
6590 messages. Return 1 if the definition is particularly bad, or 0
6594 check_static_variable_definition (tree decl, tree type)
6596 /* Motion 10 at San Diego: If a static const integral data member is
6597 initialized with an integral constant expression, the initializer
6598 may appear either in the declaration (within the class), or in
6599 the definition, but not both. If it appears in the class, the
6600 member is a member constant. The file-scope definition is always
6602 if (!ARITHMETIC_TYPE_P (type) && TREE_CODE (type) != ENUMERAL_TYPE)
6604 error ("invalid in-class initialization of static data member "
6605 "of non-integral type %qT",
6607 /* If we just return the declaration, crashes will sometimes
6608 occur. We therefore return void_type_node, as if this were a
6609 friend declaration, to cause callers to completely ignore
6610 this declaration. */
6613 else if (!CP_TYPE_CONST_P (type))
6614 error ("ISO C++ forbids in-class initialization of non-const "
6615 "static member %qD",
6617 else if (pedantic && !INTEGRAL_TYPE_P (type))
6618 pedwarn ("ISO C++ forbids initialization of member constant "
6619 "%qD of non-integral type %qT", decl, type);
6624 /* Given the SIZE (i.e., number of elements) in an array, compute an
6625 appropriate index type for the array. If non-NULL, NAME is the
6626 name of the thing being declared. */
6629 compute_array_index_type (tree name, tree size)
6634 if (error_operand_p (size))
6635 return error_mark_node;
6637 type = TREE_TYPE (size);
6638 /* The array bound must be an integer type. */
6639 if (!dependent_type_p (type) && !INTEGRAL_TYPE_P (type))
6642 error ("size of array %qD has non-integral type %qT", name, type);
6644 error ("size of array has non-integral type %qT", type);
6645 size = integer_one_node;
6646 type = TREE_TYPE (size);
6649 if (abi_version_at_least (2)
6650 /* We should only handle value dependent expressions specially. */
6651 ? value_dependent_expression_p (size)
6652 /* But for abi-1, we handled all instances in templates. This
6653 effects the manglings produced. */
6654 : processing_template_decl)
6655 return build_index_type (build_min (MINUS_EXPR, sizetype,
6656 size, integer_one_node));
6658 /* The size might be the result of a cast. */
6659 STRIP_TYPE_NOPS (size);
6661 /* It might be a const variable or enumeration constant. */
6662 size = integral_constant_value (size);
6664 /* Normally, the array-bound will be a constant. */
6665 if (TREE_CODE (size) == INTEGER_CST)
6667 /* Check to see if the array bound overflowed. Make that an
6668 error, no matter how generous we're being. */
6669 int old_flag_pedantic_errors = flag_pedantic_errors;
6670 int old_pedantic = pedantic;
6671 pedantic = flag_pedantic_errors = 1;
6672 constant_expression_warning (size);
6673 pedantic = old_pedantic;
6674 flag_pedantic_errors = old_flag_pedantic_errors;
6676 /* An array must have a positive number of elements. */
6677 if (INT_CST_LT (size, integer_zero_node))
6680 error ("size of array %qD is negative", name);
6682 error ("size of array is negative");
6683 size = integer_one_node;
6685 /* As an extension we allow zero-sized arrays. We always allow
6686 them in system headers because glibc uses them. */
6687 else if (integer_zerop (size) && pedantic && !in_system_header)
6690 pedwarn ("ISO C++ forbids zero-size array %qD", name);
6692 pedwarn ("ISO C++ forbids zero-size array");
6695 else if (TREE_CONSTANT (size))
6697 /* `(int) &fn' is not a valid array bound. */
6699 error ("size of array %qD is not an integral constant-expression",
6702 error ("size of array is not an integral constant-expression");
6703 size = integer_one_node;
6708 pedwarn ("ISO C++ forbids variable-size array %qD", name);
6710 pedwarn ("ISO C++ forbids variable-size array");
6713 if (processing_template_decl && !TREE_CONSTANT (size))
6714 /* A variable sized array. */
6715 itype = build_min (MINUS_EXPR, sizetype, size, integer_one_node);
6718 HOST_WIDE_INT saved_processing_template_decl;
6720 /* Compute the index of the largest element in the array. It is
6721 one less than the number of elements in the array. We save
6722 and restore PROCESSING_TEMPLATE_DECL so that computations in
6723 cp_build_binary_op will be appropriately folded. */
6724 saved_processing_template_decl = processing_template_decl;
6725 processing_template_decl = 0;
6726 itype = cp_build_binary_op (MINUS_EXPR,
6727 cp_convert (ssizetype, size),
6728 cp_convert (ssizetype, integer_one_node));
6729 itype = fold (itype);
6730 processing_template_decl = saved_processing_template_decl;
6732 if (!TREE_CONSTANT (itype))
6733 /* A variable sized array. */
6734 itype = variable_size (itype);
6735 /* Make sure that there was no overflow when creating to a signed
6736 index type. (For example, on a 32-bit machine, an array with
6737 size 2^32 - 1 is too big.) */
6738 else if (TREE_CODE (itype) == INTEGER_CST
6739 && TREE_OVERFLOW (itype))
6741 error ("overflow in array dimension");
6742 TREE_OVERFLOW (itype) = 0;
6746 /* Create and return the appropriate index type. */
6747 return build_index_type (itype);
6750 /* Returns the scope (if any) in which the entity declared by
6751 DECLARATOR will be located. If the entity was declared with an
6752 unqualified name, NULL_TREE is returned. */
6755 get_scope_of_declarator (const cp_declarator *declarator)
6757 while (declarator && declarator->kind != cdk_id)
6758 declarator = declarator->declarator;
6760 /* If the declarator-id is a SCOPE_REF, the scope in which the
6761 declaration occurs is the first operand. */
6763 && declarator->u.id.qualifying_scope)
6764 return declarator->u.id.qualifying_scope;
6766 /* Otherwise, the declarator is not a qualified name; the entity will
6767 be declared in the current scope. */
6771 /* Returns an ARRAY_TYPE for an array with SIZE elements of the
6772 indicated TYPE. If non-NULL, NAME is the NAME of the declaration
6776 create_array_type_for_decl (tree name, tree type, tree size)
6778 tree itype = NULL_TREE;
6779 const char* error_msg;
6781 /* If things have already gone awry, bail now. */
6782 if (type == error_mark_node || size == error_mark_node)
6783 return error_mark_node;
6785 /* Assume that everything will go OK. */
6788 /* There are some types which cannot be array elements. */
6789 switch (TREE_CODE (type))
6792 error_msg = "array of void";
6796 error_msg = "array of functions";
6799 case REFERENCE_TYPE:
6800 error_msg = "array of references";
6804 error_msg = "array of function members";
6811 /* If something went wrong, issue an error-message and return. */
6815 error ("declaration of %qD as %s", name, error_msg);
6817 error ("creating %s", error_msg);
6819 return error_mark_node;
6824 The constant expressions that specify the bounds of the arrays
6825 can be omitted only for the first member of the sequence. */
6826 if (TREE_CODE (type) == ARRAY_TYPE && !TYPE_DOMAIN (type))
6829 error ("declaration of %qD as multidimensional array must "
6830 "have bounds for all dimensions except the first",
6833 error ("multidimensional array must have bounds for all "
6834 "dimensions except the first");
6836 return error_mark_node;
6839 /* Figure out the index type for the array. */
6841 itype = compute_array_index_type (name, size);
6844 T is called the array element type; this type shall not be [...] an
6845 abstract class type. */
6846 abstract_virtuals_error (name, type);
6848 return build_cplus_array_type (type, itype);
6851 /* Check that it's OK to declare a function with the indicated TYPE.
6852 SFK indicates the kind of special function (if any) that this
6853 function is. OPTYPE is the type given in a conversion operator
6854 declaration, or the class type for a constructor/destructor.
6855 Returns the actual return type of the function; that
6856 may be different than TYPE if an error occurs, or for certain
6857 special functions. */
6860 check_special_function_return_type (special_function_kind sfk,
6866 case sfk_constructor:
6868 error ("return type specification for constructor invalid");
6870 if (targetm.cxx.cdtor_returns_this () && !TYPE_FOR_JAVA (optype))
6871 type = build_pointer_type (optype);
6873 type = void_type_node;
6876 case sfk_destructor:
6878 error ("return type specification for destructor invalid");
6879 /* We can't use the proper return type here because we run into
6880 problems with ambiguous bases and covariant returns.
6881 Java classes are left unchanged because (void *) isn't a valid
6882 Java type, and we don't want to change the Java ABI. */
6883 if (targetm.cxx.cdtor_returns_this () && !TYPE_FOR_JAVA (optype))
6884 type = build_pointer_type (void_type_node);
6886 type = void_type_node;
6889 case sfk_conversion:
6890 if (type && !same_type_p (type, optype))
6891 error ("operator %qT declared to return %qT", optype, type);
6893 pedwarn ("return type specified for %<operator %T%>", optype);
6904 /* A variable or data member (whose unqualified name is IDENTIFIER)
6905 has been declared with the indicated TYPE. If the TYPE is not
6906 acceptable, issue an error message and return a type to use for
6907 error-recovery purposes. */
6910 check_var_type (tree identifier, tree type)
6912 if (VOID_TYPE_P (type))
6915 error ("unnamed variable or field declared void");
6916 else if (TREE_CODE (identifier) == IDENTIFIER_NODE)
6918 gcc_assert (!IDENTIFIER_OPNAME_P (identifier));
6919 error ("variable or field %qE declared void", identifier);
6922 error ("variable or field declared void");
6923 type = error_mark_node;
6929 /* Given declspecs and a declarator (abstract or otherwise), determine
6930 the name and type of the object declared and construct a DECL node
6933 DECLSPECS is a chain of tree_list nodes whose value fields
6934 are the storage classes and type specifiers.
6936 DECL_CONTEXT says which syntactic context this declaration is in:
6937 NORMAL for most contexts. Make a VAR_DECL or FUNCTION_DECL or TYPE_DECL.
6938 FUNCDEF for a function definition. Like NORMAL but a few different
6939 error messages in each case. Return value may be zero meaning
6940 this definition is too screwy to try to parse.
6941 MEMFUNCDEF for a function definition. Like FUNCDEF but prepares to
6942 handle member functions (which have FIELD context).
6943 Return value may be zero meaning this definition is too screwy to
6945 PARM for a parameter declaration (either within a function prototype
6946 or before a function body). Make a PARM_DECL, or return void_type_node.
6947 CATCHPARM for a parameter declaration before a catch clause.
6948 TYPENAME if for a typename (in a cast or sizeof).
6949 Don't make a DECL node; just return the ..._TYPE node.
6950 FIELD for a struct or union field; make a FIELD_DECL.
6951 BITFIELD for a field with specified width.
6952 INITIALIZED is 1 if the decl has an initializer.
6954 ATTRLIST is a pointer to the list of attributes, which may be NULL
6955 if there are none; *ATTRLIST may be modified if attributes from inside
6956 the declarator should be applied to the declaration.
6958 When this function is called, scoping variables (such as
6959 CURRENT_CLASS_TYPE) should reflect the scope in which the
6960 declaration occurs, not the scope in which the new declaration will
6961 be placed. For example, on:
6965 when grokdeclarator is called for `S::f', the CURRENT_CLASS_TYPE
6968 Returns a DECL (if a declarator is present), a TYPE (if there is no
6969 declarator, in cases like "struct S;"), or the ERROR_MARK_NODE if an
6973 grokdeclarator (const cp_declarator *declarator,
6974 const cp_decl_specifier_seq *declspecs,
6975 enum decl_context decl_context,
6979 tree type = NULL_TREE;
6981 int virtualp, explicitp, friendp, inlinep, staticp;
6982 int explicit_int = 0;
6983 int explicit_char = 0;
6984 int defaulted_int = 0;
6985 tree dependent_name = NULL_TREE;
6987 tree typedef_decl = NULL_TREE;
6988 const char *name = NULL;
6989 tree typedef_type = NULL_TREE;
6990 /* True if this declarator is a function definition. */
6991 bool funcdef_flag = false;
6992 cp_declarator_kind innermost_code = cdk_error;
6995 /* See the code below that used this. */
6996 tree decl_attr = NULL_TREE;
6999 /* Keep track of what sort of function is being processed
7000 so that we can warn about default return values, or explicit
7001 return values which do not match prescribed defaults. */
7002 special_function_kind sfk = sfk_none;
7004 tree dname = NULL_TREE;
7005 tree ctor_return_type = NULL_TREE;
7006 enum overload_flags flags = NO_SPECIAL;
7007 /* cv-qualifiers that apply to the declarator, for a declaration of
7008 a member function. */
7009 cp_cv_quals memfn_quals = TYPE_UNQUALIFIED;
7010 /* cv-qualifiers that apply to the type specified by the DECLSPECS. */
7012 tree raises = NULL_TREE;
7013 int template_count = 0;
7014 tree returned_attrs = NULL_TREE;
7015 tree parms = NULL_TREE;
7016 const cp_declarator *id_declarator;
7017 /* The unqualified name of the declarator; either an
7018 IDENTIFIER_NODE, BIT_NOT_EXPR, or TEMPLATE_ID_EXPR. */
7019 tree unqualified_id;
7020 /* The class type, if any, in which this entity is located,
7021 or NULL_TREE if none. Note that this value may be different from
7022 the current class type; for example if an attempt is made to declare
7023 "A::f" inside "B", this value will be "A". */
7024 tree ctype = current_class_type;
7025 /* The NAMESPACE_DECL for the namespace in which this entity is
7026 located. If an unqualified name is used to declare the entity,
7027 this value will be NULL_TREE, even if the entity is located at
7029 tree in_namespace = NULL_TREE;
7030 cp_storage_class storage_class;
7031 bool unsigned_p, signed_p, short_p, long_p, thread_p;
7032 bool type_was_error_mark_node = false;
7034 signed_p = declspecs->specs[(int)ds_signed];
7035 unsigned_p = declspecs->specs[(int)ds_unsigned];
7036 short_p = declspecs->specs[(int)ds_short];
7037 long_p = declspecs->specs[(int)ds_long];
7038 longlong = declspecs->specs[(int)ds_long] >= 2;
7039 thread_p = declspecs->specs[(int)ds_thread];
7041 if (decl_context == FUNCDEF)
7042 funcdef_flag = true, decl_context = NORMAL;
7043 else if (decl_context == MEMFUNCDEF)
7044 funcdef_flag = true, decl_context = FIELD;
7045 else if (decl_context == BITFIELD)
7046 bitfield = 1, decl_context = FIELD;
7048 /* Look inside a declarator for the name being declared
7049 and get it as a string, for an error message. */
7050 for (id_declarator = declarator;
7052 id_declarator = id_declarator->declarator)
7054 if (id_declarator->kind != cdk_id)
7055 innermost_code = id_declarator->kind;
7057 switch (id_declarator->kind)
7060 if (id_declarator->declarator
7061 && id_declarator->declarator->kind == cdk_id)
7063 sfk = id_declarator->declarator->u.id.sfk;
7064 if (sfk == sfk_destructor)
7071 tree qualifying_scope = id_declarator->u.id.qualifying_scope;
7072 tree decl = id_declarator->u.id.unqualified_name;
7075 if (qualifying_scope)
7077 if (at_function_scope_p ())
7081 A declarator-id shall not be qualified except
7084 None of the cases are permitted in block
7086 if (qualifying_scope == global_namespace)
7087 error ("invalid use of qualified-name %<::%D%>",
7089 else if (TYPE_P (qualifying_scope))
7090 error ("invalid use of qualified-name %<%T::%D%>",
7091 qualifying_scope, decl);
7093 error ("invalid use of qualified-name %<%D::%D%>",
7094 qualifying_scope, decl);
7095 return error_mark_node;
7097 else if (TYPE_P (qualifying_scope))
7099 ctype = qualifying_scope;
7100 if (innermost_code != cdk_function
7101 && current_class_type
7102 && !UNIQUELY_DERIVED_FROM_P (ctype,
7103 current_class_type))
7105 error ("type %qT is not derived from type %qT",
7106 ctype, current_class_type);
7107 return error_mark_node;
7110 else if (TREE_CODE (qualifying_scope) == NAMESPACE_DECL)
7111 in_namespace = qualifying_scope;
7113 switch (TREE_CODE (decl))
7119 if (innermost_code != cdk_function)
7121 error ("declaration of %qD as non-function", decl);
7122 return error_mark_node;
7124 else if (!qualifying_scope
7125 && !(current_class_type && at_class_scope_p ()))
7127 error ("declaration of %qD as non-member", decl);
7128 return error_mark_node;
7131 type = TREE_OPERAND (decl, 0);
7132 name = IDENTIFIER_POINTER (constructor_name (type));
7137 case TEMPLATE_ID_EXPR:
7139 tree fns = TREE_OPERAND (decl, 0);
7142 if (TREE_CODE (dname) != IDENTIFIER_NODE)
7144 gcc_assert (is_overloaded_fn (dname));
7145 dname = DECL_NAME (get_first_fn (dname));
7150 case IDENTIFIER_NODE:
7151 if (TREE_CODE (decl) == IDENTIFIER_NODE)
7154 if (C_IS_RESERVED_WORD (dname))
7156 error ("declarator-id missing; using reserved word %qD",
7158 name = IDENTIFIER_POINTER (dname);
7160 else if (!IDENTIFIER_TYPENAME_P (dname))
7161 name = IDENTIFIER_POINTER (dname);
7164 gcc_assert (flags == NO_SPECIAL);
7165 flags = TYPENAME_FLAG;
7166 ctor_return_type = TREE_TYPE (dname);
7167 sfk = sfk_conversion;
7168 if (is_typename_at_global_scope (dname))
7169 name = IDENTIFIER_POINTER (dname);
7171 name = "<invalid operator>";
7187 return error_mark_node;
7193 if (id_declarator->kind == cdk_id)
7199 The declarator in a function-definition shall have the form
7200 D1 ( parameter-declaration-clause) ... */
7201 if (funcdef_flag && innermost_code != cdk_function)
7203 error ("function definition does not declare parameters");
7204 return error_mark_node;
7207 if (((dname && IDENTIFIER_OPNAME_P (dname)) || flags == TYPENAME_FLAG)
7208 && innermost_code != cdk_function
7209 && ! (ctype && !declspecs->any_specifiers_p))
7211 error ("declaration of %qD as non-function", dname);
7212 return error_mark_node;
7215 /* Anything declared one level down from the top level
7216 must be one of the parameters of a function
7217 (because the body is at least two levels down). */
7219 /* This heuristic cannot be applied to C++ nodes! Fixed, however,
7220 by not allowing C++ class definitions to specify their parameters
7221 with xdecls (must be spec.d in the parmlist).
7223 Since we now wait to push a class scope until we are sure that
7224 we are in a legitimate method context, we must set oldcname
7225 explicitly (since current_class_name is not yet alive).
7227 We also want to avoid calling this a PARM if it is in a namespace. */
7229 if (decl_context == NORMAL && !toplevel_bindings_p ())
7231 struct cp_binding_level *b = current_binding_level;
7232 current_binding_level = b->level_chain;
7233 if (current_binding_level != 0 && toplevel_bindings_p ())
7234 decl_context = PARM;
7235 current_binding_level = b;
7239 name = decl_context == PARM ? "parameter" : "type name";
7241 /* If there were multiple types specified in the decl-specifier-seq,
7242 issue an error message. */
7243 if (declspecs->multiple_types_p)
7245 error ("two or more data types in declaration of %qs", name);
7246 return error_mark_node;
7249 /* Extract the basic type from the decl-specifier-seq. */
7250 type = declspecs->type;
7251 if (type == error_mark_node)
7254 type_was_error_mark_node = true;
7256 /* If the entire declaration is itself tagged as deprecated then
7257 suppress reports of deprecated items. */
7258 if (type && TREE_DEPRECATED (type)
7259 && deprecated_state != DEPRECATED_SUPPRESS)
7260 warn_deprecated_use (type);
7261 if (type && TREE_CODE (type) == TYPE_DECL)
7263 typedef_decl = type;
7264 type = TREE_TYPE (typedef_decl);
7266 /* No type at all: default to `int', and set DEFAULTED_INT
7267 because it was not a user-defined typedef. */
7268 if (type == NULL_TREE && (signed_p || unsigned_p || long_p || short_p))
7270 /* These imply 'int'. */
7271 type = integer_type_node;
7275 explicit_int = declspecs->explicit_int_p;
7276 explicit_char = declspecs->explicit_char_p;
7279 /* See the code below that used this. */
7281 decl_attr = DECL_ATTRIBUTES (typedef_decl);
7283 typedef_type = type;
7286 if (sfk != sfk_conversion)
7287 ctor_return_type = ctype;
7289 if (sfk != sfk_none)
7290 type = check_special_function_return_type (sfk, type,
7292 else if (type == NULL_TREE)
7298 /* We handle `main' specially here, because 'main () { }' is so
7299 common. With no options, it is allowed. With -Wreturn-type,
7300 it is a warning. It is only an error with -pedantic-errors. */
7301 is_main = (funcdef_flag
7302 && dname && MAIN_NAME_P (dname)
7303 && ctype == NULL_TREE
7304 && in_namespace == NULL_TREE
7305 && current_namespace == global_namespace);
7307 if (type_was_error_mark_node)
7308 /* We've already issued an error, don't complain more. */;
7309 else if (in_system_header || flag_ms_extensions)
7310 /* Allow it, sigh. */;
7311 else if (pedantic || ! is_main)
7312 pedwarn ("ISO C++ forbids declaration of %qs with no type", name);
7313 else if (warn_return_type)
7314 warning (0, "ISO C++ forbids declaration of %qs with no type", name);
7316 type = integer_type_node;
7321 /* Now process the modifiers that were specified
7322 and check for invalid combinations. */
7324 /* Long double is a special combination. */
7325 if (long_p && !longlong && TYPE_MAIN_VARIANT (type) == double_type_node)
7328 type = build_qualified_type (long_double_type_node,
7329 cp_type_quals (type));
7332 /* Check all other uses of type modifiers. */
7334 if (unsigned_p || signed_p || long_p || short_p)
7338 if ((signed_p || unsigned_p) && TREE_CODE (type) != INTEGER_TYPE)
7339 error ("%<signed%> or %<unsigned%> invalid for %qs", name);
7340 else if (signed_p && unsigned_p)
7341 error ("%<signed%> and %<unsigned%> specified together for %qs", name);
7342 else if (longlong && TREE_CODE (type) != INTEGER_TYPE)
7343 error ("%<long long%> invalid for %qs", name);
7344 else if (long_p && TREE_CODE (type) == REAL_TYPE)
7345 error ("%<long%> invalid for %qs", name);
7346 else if (short_p && TREE_CODE (type) == REAL_TYPE)
7347 error ("%<short%> invalid for %qs", name);
7348 else if ((long_p || short_p) && TREE_CODE (type) != INTEGER_TYPE)
7349 error ("%<long%> or %<short%> invalid for %qs", name);
7350 else if ((long_p || short_p) && explicit_char)
7351 error ("%<long%> or %<short%> specified with char for %qs", name);
7352 else if (long_p && short_p)
7353 error ("%<long%> and %<short%> specified together for %qs", name);
7357 if (!explicit_int && !defaulted_int && !explicit_char && pedantic)
7359 pedwarn ("long, short, signed or unsigned used invalidly for %qs",
7361 if (flag_pedantic_errors)
7366 /* Discard the type modifiers if they are invalid. */
7377 /* Decide whether an integer type is signed or not.
7378 Optionally treat bitfields as signed by default. */
7382 It is implementation-defined whether a plain (neither
7383 explicitly signed or unsigned) char, short, int, or long
7384 bit-field is signed or unsigned.
7386 Naturally, we extend this to long long as well. Note that
7387 this does not include wchar_t. */
7388 || (bitfield && !flag_signed_bitfields
7390 /* A typedef for plain `int' without `signed' can be
7391 controlled just like plain `int', but a typedef for
7392 `signed int' cannot be so controlled. */
7394 && C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl))
7395 && TREE_CODE (type) == INTEGER_TYPE
7396 && !same_type_p (TYPE_MAIN_VARIANT (type), wchar_type_node)))
7399 type = long_long_unsigned_type_node;
7401 type = long_unsigned_type_node;
7403 type = short_unsigned_type_node;
7404 else if (type == char_type_node)
7405 type = unsigned_char_type_node;
7406 else if (typedef_decl)
7407 type = c_common_unsigned_type (type);
7409 type = unsigned_type_node;
7411 else if (signed_p && type == char_type_node)
7412 type = signed_char_type_node;
7414 type = long_long_integer_type_node;
7416 type = long_integer_type_node;
7418 type = short_integer_type_node;
7420 if (declspecs->specs[(int)ds_complex])
7422 if (TREE_CODE (type) != INTEGER_TYPE && TREE_CODE (type) != REAL_TYPE)
7423 error ("complex invalid for %qs", name);
7424 /* If we just have "complex", it is equivalent to
7425 "complex double", but if any modifiers at all are specified it is
7426 the complex form of TYPE. E.g, "complex short" is
7427 "complex short int". */
7429 else if (defaulted_int && ! longlong
7430 && ! (long_p || short_p || signed_p || unsigned_p))
7431 type = complex_double_type_node;
7432 else if (type == integer_type_node)
7433 type = complex_integer_type_node;
7434 else if (type == float_type_node)
7435 type = complex_float_type_node;
7436 else if (type == double_type_node)
7437 type = complex_double_type_node;
7438 else if (type == long_double_type_node)
7439 type = complex_long_double_type_node;
7441 type = build_complex_type (type);
7444 type_quals = TYPE_UNQUALIFIED;
7445 if (declspecs->specs[(int)ds_const])
7446 type_quals |= TYPE_QUAL_CONST;
7447 if (declspecs->specs[(int)ds_volatile])
7448 type_quals |= TYPE_QUAL_VOLATILE;
7449 if (declspecs->specs[(int)ds_restrict])
7450 type_quals |= TYPE_QUAL_RESTRICT;
7451 if (sfk == sfk_conversion && type_quals != TYPE_UNQUALIFIED)
7452 error ("qualifiers are not allowed on declaration of %<operator %T%>",
7455 if (TREE_CODE (type) == FUNCTION_TYPE
7456 && type_quals != TYPE_UNQUALIFIED)
7458 /* This was an error in C++98 (cv-qualifiers cannot be added to
7459 a function type), but DR 295 makes the code well-formed by
7460 dropping the extra qualifiers. */
7463 tree bad_type = build_qualified_type (type, type_quals);
7464 pedwarn ("ignoring %qV qualifiers added to function type %qT",
7467 type_quals = TYPE_UNQUALIFIED;
7469 type_quals |= cp_type_quals (type);
7470 type = cp_build_qualified_type_real
7471 (type, type_quals, ((typedef_decl && !DECL_ARTIFICIAL (typedef_decl)
7472 ? tf_ignore_bad_quals : 0) | tf_warning_or_error));
7473 /* We might have ignored or rejected some of the qualifiers. */
7474 type_quals = cp_type_quals (type);
7477 inlinep = !! declspecs->specs[(int)ds_inline];
7478 virtualp = !! declspecs->specs[(int)ds_virtual];
7479 explicitp = !! declspecs->specs[(int)ds_explicit];
7481 storage_class = declspecs->storage_class;
7482 if (storage_class == sc_static)
7483 staticp = 1 + (decl_context == FIELD);
7485 if (virtualp && staticp == 2)
7487 error ("member %qD cannot be declared both virtual and static", dname);
7488 storage_class = sc_none;
7491 friendp = !! declspecs->specs[(int)ds_friend];
7493 if (dependent_name && !friendp)
7495 error ("%<%T::%D%> is not a valid declarator", ctype, dependent_name);
7496 return error_mark_node;
7499 /* Issue errors about use of storage classes for parameters. */
7500 if (decl_context == PARM)
7502 if (declspecs->specs[(int)ds_typedef])
7504 error ("typedef declaration invalid in parameter declaration");
7505 return error_mark_node;
7507 else if (storage_class == sc_static
7508 || storage_class == sc_extern
7510 error ("storage class specifiers invalid in parameter declarations");
7513 /* Give error if `virtual' is used outside of class declaration. */
7515 && (current_class_name == NULL_TREE || decl_context != FIELD))
7517 error ("virtual outside class declaration");
7521 /* Static anonymous unions are dealt with here. */
7522 if (staticp && decl_context == TYPENAME
7524 && ANON_AGGR_TYPE_P (declspecs->type))
7525 decl_context = FIELD;
7527 /* Warn about storage classes that are invalid for certain
7528 kinds of declarations (parameters, typenames, etc.). */
7531 && storage_class != sc_extern
7532 && storage_class != sc_static)
7533 || declspecs->specs[(int)ds_typedef]))
7535 error ("multiple storage classes in declaration of %qs", name);
7538 if (declspecs->conflicting_specifiers_p)
7540 error ("conflicting specifiers in declaration of %qs", name);
7541 storage_class = sc_none;
7543 else if (decl_context != NORMAL
7544 && ((storage_class != sc_none
7545 && storage_class != sc_mutable)
7548 if ((decl_context == PARM || decl_context == CATCHPARM)
7549 && (storage_class == sc_register
7550 || storage_class == sc_auto))
7552 else if (declspecs->specs[(int)ds_typedef])
7554 else if (decl_context == FIELD
7555 /* C++ allows static class elements. */
7556 && storage_class == sc_static)
7557 /* C++ also allows inlines and signed and unsigned elements,
7558 but in those cases we don't come in here. */
7562 if (decl_context == FIELD)
7563 error ("storage class specified for %qs", name);
7566 if (decl_context == PARM || decl_context == CATCHPARM)
7567 error ("storage class specified for parameter %qs", name);
7569 error ("storage class specified for typename");
7571 if (storage_class == sc_register
7572 || storage_class == sc_auto
7573 || storage_class == sc_extern
7575 storage_class = sc_none;
7578 else if (storage_class == sc_extern && initialized
7581 if (toplevel_bindings_p ())
7583 /* It's common practice (and completely valid) to have a const
7584 be initialized and declared extern. */
7585 if (!(type_quals & TYPE_QUAL_CONST))
7586 warning (0, "%qs initialized and declared %<extern%>", name);
7589 error ("%qs has both %<extern%> and initializer", name);
7591 else if (storage_class == sc_extern && funcdef_flag
7592 && ! toplevel_bindings_p ())
7593 error ("nested function %qs declared %<extern%>", name);
7594 else if (toplevel_bindings_p ())
7596 if (storage_class == sc_auto)
7597 error ("top-level declaration of %qs specifies %<auto%>", name);
7600 && storage_class != sc_extern
7601 && storage_class != sc_static)
7603 error ("function-scope %qs implicitly auto and declared %<__thread%>",
7608 if (storage_class && friendp)
7609 error ("storage class specifiers invalid in friend function declarations");
7612 unqualified_id = NULL_TREE;
7615 unqualified_id = id_declarator->u.id.unqualified_name;
7616 switch (TREE_CODE (unqualified_id))
7620 = constructor_name (TREE_OPERAND (unqualified_id, 0));
7623 case IDENTIFIER_NODE:
7624 case TEMPLATE_ID_EXPR:
7632 /* Determine the type of the entity declared by recurring on the
7634 for (; declarator; declarator = declarator->declarator)
7636 const cp_declarator *inner_declarator;
7639 if (type == error_mark_node)
7640 return error_mark_node;
7642 attrs = declarator->attributes;
7648 if (declarator == NULL || declarator->kind == cdk_id)
7649 attr_flags |= (int) ATTR_FLAG_DECL_NEXT;
7650 if (declarator->kind == cdk_function)
7651 attr_flags |= (int) ATTR_FLAG_FUNCTION_NEXT;
7652 if (declarator->kind == cdk_array)
7653 attr_flags |= (int) ATTR_FLAG_ARRAY_NEXT;
7654 returned_attrs = decl_attributes (&type,
7655 chainon (returned_attrs, attrs),
7659 if (declarator->kind == cdk_id)
7662 inner_declarator = declarator->declarator;
7664 switch (declarator->kind)
7667 type = create_array_type_for_decl (dname, type,
7668 declarator->u.array.bounds);
7676 /* Declaring a function type.
7677 Make sure we have a valid type for the function to return. */
7679 /* We now know that the TYPE_QUALS don't apply to the
7680 decl, but to its return type. */
7681 type_quals = TYPE_UNQUALIFIED;
7683 /* Warn about some types functions can't return. */
7685 if (TREE_CODE (type) == FUNCTION_TYPE)
7687 error ("%qs declared as function returning a function", name);
7688 type = integer_type_node;
7690 if (TREE_CODE (type) == ARRAY_TYPE)
7692 error ("%qs declared as function returning an array", name);
7693 type = integer_type_node;
7696 /* Pick up type qualifiers which should be applied to `this'. */
7697 memfn_quals = declarator->u.function.qualifiers;
7699 /* Pick up the exception specifications. */
7700 raises = declarator->u.function.exception_specification;
7702 /* Say it's a definition only for the CALL_EXPR
7703 closest to the identifier. */
7704 funcdecl_p = inner_declarator && inner_declarator->kind == cdk_id;
7706 if (ctype == NULL_TREE
7707 && decl_context == FIELD
7709 && (friendp == 0 || dname == current_class_name))
7710 ctype = current_class_type;
7712 if (ctype && (sfk == sfk_constructor
7713 || sfk == sfk_destructor))
7715 /* We are within a class's scope. If our declarator name
7716 is the same as the class name, and we are defining
7717 a function, then it is a constructor/destructor, and
7718 therefore returns a void type. */
7720 /* ISO C++ 12.4/2. A destructor may not be declared
7721 const or volatile. A destructor may not be
7724 ISO C++ 12.1. A constructor may not be declared
7725 const or volatile. A constructor may not be
7726 virtual. A constructor may not be static. */
7728 error ((flags == DTOR_FLAG)
7729 ? "destructor cannot be static member function"
7730 : "constructor cannot be static member function");
7733 error ((flags == DTOR_FLAG)
7734 ? "destructors may not be cv-qualified"
7735 : "constructors may not be cv-qualified");
7736 memfn_quals = TYPE_UNQUALIFIED;
7739 if (decl_context == FIELD
7740 && !member_function_or_else (ctype,
7743 return error_mark_node;
7745 if (flags != DTOR_FLAG)
7747 /* It's a constructor. */
7752 pedwarn ("constructors cannot be declared virtual");
7755 if (decl_context == FIELD
7756 && sfk != sfk_constructor)
7757 return error_mark_node;
7759 if (decl_context == FIELD)
7765 error ("can't initialize friend function %qs", name);
7768 /* Cannot be both friend and virtual. */
7769 error ("virtual functions cannot be friends");
7772 if (decl_context == NORMAL)
7773 error ("friend declaration not in class definition");
7774 if (current_function_decl && funcdef_flag)
7775 error ("can't define friend function %qs in a local "
7780 arg_types = grokparms (declarator->u.function.parameters,
7783 if (inner_declarator
7784 && inner_declarator->kind == cdk_id
7785 && inner_declarator->u.id.sfk == sfk_destructor
7786 && arg_types != void_list_node)
7788 error ("destructors may not have parameters");
7789 arg_types = void_list_node;
7793 type = build_function_type (type, arg_types);
7800 /* Filter out pointers-to-references and references-to-references.
7801 We can get these if a TYPE_DECL is used. */
7803 if (TREE_CODE (type) == REFERENCE_TYPE)
7805 error (declarator->kind == cdk_reference
7806 ? "cannot declare reference to %q#T"
7807 : "cannot declare pointer to %q#T", type);
7808 type = TREE_TYPE (type);
7810 else if (VOID_TYPE_P (type))
7812 if (declarator->kind == cdk_reference)
7813 error ("cannot declare reference to %q#T", type);
7814 else if (declarator->kind == cdk_ptrmem)
7815 error ("cannot declare pointer to %q#T member", type);
7818 /* We now know that the TYPE_QUALS don't apply to the decl,
7819 but to the target of the pointer. */
7820 type_quals = TYPE_UNQUALIFIED;
7822 if (declarator->kind == cdk_ptrmem
7823 && (TREE_CODE (type) == FUNCTION_TYPE || memfn_quals))
7825 memfn_quals |= cp_type_quals (type);
7826 type = build_memfn_type (type,
7827 declarator->u.pointer.class_type,
7829 memfn_quals = TYPE_UNQUALIFIED;
7832 if (declarator->kind == cdk_reference)
7834 if (!VOID_TYPE_P (type))
7835 type = build_reference_type (type);
7837 else if (TREE_CODE (type) == METHOD_TYPE)
7838 type = build_ptrmemfunc_type (build_pointer_type (type));
7839 else if (declarator->kind == cdk_ptrmem)
7841 gcc_assert (TREE_CODE (declarator->u.pointer.class_type)
7843 if (declarator->u.pointer.class_type == error_mark_node)
7844 /* We will already have complained. */
7845 type = error_mark_node;
7847 type = build_ptrmem_type (declarator->u.pointer.class_type,
7851 type = build_pointer_type (type);
7853 /* Process a list of type modifier keywords (such as
7854 const or volatile) that were given inside the `*' or `&'. */
7856 if (declarator->u.pointer.qualifiers)
7859 = cp_build_qualified_type (type,
7860 declarator->u.pointer.qualifiers);
7861 type_quals = cp_type_quals (type);
7874 if (unqualified_id && TREE_CODE (unqualified_id) == TEMPLATE_ID_EXPR
7875 && TREE_CODE (type) != FUNCTION_TYPE
7876 && TREE_CODE (type) != METHOD_TYPE)
7878 error ("template-id %qD used as a declarator",
7880 unqualified_id = dname;
7883 /* If TYPE is a FUNCTION_TYPE, but the function name was explicitly
7884 qualified with a class-name, turn it into a METHOD_TYPE, unless
7885 we know that the function is static. We take advantage of this
7886 opportunity to do other processing that pertains to entities
7887 explicitly declared to be class members. Note that if DECLARATOR
7888 is non-NULL, we know it is a cdk_id declarator; otherwise, we
7889 would not have exited the loop above. */
7891 && declarator->u.id.qualifying_scope
7892 && TYPE_P (declarator->u.id.qualifying_scope))
7896 ctype = declarator->u.id.qualifying_scope;
7897 ctype = TYPE_MAIN_VARIANT (ctype);
7899 while (t != NULL_TREE && CLASS_TYPE_P (t))
7901 /* You're supposed to have one `template <...>' for every
7902 template class, but you don't need one for a full
7903 specialization. For example:
7905 template <class T> struct S{};
7906 template <> struct S<int> { void f(); };
7907 void S<int>::f () {}
7909 is correct; there shouldn't be a `template <>' for the
7910 definition of `S<int>::f'. */
7911 if (CLASSTYPE_TEMPLATE_SPECIALIZATION (t)
7912 && !any_dependent_template_arguments_p (CLASSTYPE_TI_ARGS (t)))
7913 /* T is an explicit (not partial) specialization. All
7914 containing classes must therefore also be explicitly
7917 if ((CLASSTYPE_USE_TEMPLATE (t) || CLASSTYPE_IS_TEMPLATE (t))
7918 && PRIMARY_TEMPLATE_P (CLASSTYPE_TI_TEMPLATE (t)))
7919 template_count += 1;
7921 t = TYPE_MAIN_DECL (t);
7922 t = DECL_CONTEXT (t);
7925 if (ctype == current_class_type)
7928 pedwarn ("member functions are implicitly friends of their class");
7930 pedwarn ("extra qualification %<%T::%> on member %qs",
7933 else if (/* If the qualifying type is already complete, then we
7934 can skip the following checks. */
7935 !COMPLETE_TYPE_P (ctype)
7936 && (/* If the function is being defined, then
7937 qualifying type must certainly be complete. */
7939 /* A friend declaration of "T::f" is OK, even if
7940 "T" is a template parameter. But, if this
7941 function is not a friend, the qualifying type
7943 || (!friendp && !CLASS_TYPE_P (ctype))
7944 /* For a declaration, the type need not be
7945 complete, if either it is dependent (since there
7946 is no meaningful definition of complete in that
7947 case) or the qualifying class is currently being
7949 || !(dependent_type_p (ctype)
7950 || currently_open_class (ctype)))
7951 /* Check that the qualifying type is complete. */
7952 && !complete_type_or_else (ctype, NULL_TREE))
7953 return error_mark_node;
7954 else if (TREE_CODE (type) == FUNCTION_TYPE)
7956 tree sname = declarator->u.id.unqualified_name;
7958 if (current_class_type
7959 && (!friendp || funcdef_flag))
7962 ? "cannot define member function %<%T::%s%> within %<%T%>"
7963 : "cannot declare member function %<%T::%s%> within %<%T%>",
7964 ctype, name, current_class_type);
7965 return error_mark_node;
7968 if (TREE_CODE (sname) == IDENTIFIER_NODE
7969 && NEW_DELETE_OPNAME_P (sname))
7970 /* Overloaded operator new and operator delete
7971 are always static functions. */
7974 type = build_memfn_type (type, ctype, memfn_quals);
7976 else if (declspecs->specs[(int)ds_typedef]
7977 && current_class_type)
7979 error ("cannot declare member %<%T::%s%> within %qT",
7980 ctype, name, current_class_type);
7981 return error_mark_node;
7985 /* Now TYPE has the actual type. */
7990 *attrlist = chainon (returned_attrs, *attrlist);
7992 attrlist = &returned_attrs;
7995 /* Did array size calculations overflow? */
7997 if (TREE_CODE (type) == ARRAY_TYPE
7998 && COMPLETE_TYPE_P (type)
7999 && TREE_CODE (TYPE_SIZE_UNIT (type)) == INTEGER_CST
8000 && TREE_OVERFLOW (TYPE_SIZE_UNIT (type)))
8002 error ("size of array %qs is too large", name);
8003 /* If we proceed with the array type as it is, we'll eventually
8004 crash in tree_low_cst(). */
8005 type = error_mark_node;
8008 if ((decl_context == FIELD || decl_context == PARM)
8009 && !processing_template_decl
8010 && variably_modified_type_p (type, NULL_TREE))
8012 if (decl_context == FIELD)
8013 error ("data member may not have variably modified type %qT", type);
8015 error ("parameter may not have variably modified type %qT", type);
8016 type = error_mark_node;
8019 if (explicitp == 1 || (explicitp && friendp))
8021 /* [dcl.fct.spec] The explicit specifier shall only be used in
8022 declarations of constructors within a class definition. */
8023 error ("only declarations of constructors can be %<explicit%>");
8027 if (storage_class == sc_mutable)
8029 if (decl_context != FIELD || friendp)
8031 error ("non-member %qs cannot be declared %<mutable%>", name);
8032 storage_class = sc_none;
8034 else if (decl_context == TYPENAME || declspecs->specs[(int)ds_typedef])
8036 error ("non-object member %qs cannot be declared %<mutable%>", name);
8037 storage_class = sc_none;
8039 else if (TREE_CODE (type) == FUNCTION_TYPE
8040 || TREE_CODE (type) == METHOD_TYPE)
8042 error ("function %qs cannot be declared %<mutable%>", name);
8043 storage_class = sc_none;
8047 error ("static %qs cannot be declared %<mutable%>", name);
8048 storage_class = sc_none;
8050 else if (type_quals & TYPE_QUAL_CONST)
8052 error ("const %qs cannot be declared %<mutable%>", name);
8053 storage_class = sc_none;
8057 /* If this is declaring a typedef name, return a TYPE_DECL. */
8058 if (declspecs->specs[(int)ds_typedef] && decl_context != TYPENAME)
8062 /* Note that the grammar rejects storage classes
8063 in typenames, fields or parameters. */
8064 if (current_lang_name == lang_name_java)
8065 TYPE_FOR_JAVA (type) = 1;
8067 /* This declaration:
8069 typedef void f(int) const;
8071 declares a function type which is not a member of any
8072 particular class, but which is cv-qualified; for
8073 example "f S::*" declares a pointer to a const-qualified
8074 member function of S. We record the cv-qualification in the
8076 if (memfn_quals && TREE_CODE (type) == FUNCTION_TYPE)
8077 type = cp_build_qualified_type (type, memfn_quals);
8079 if (decl_context == FIELD)
8080 decl = build_lang_decl (TYPE_DECL, unqualified_id, type);
8082 decl = build_decl (TYPE_DECL, unqualified_id, type);
8083 if (id_declarator && declarator->u.id.qualifying_scope)
8084 error ("%Jtypedef name may not be a nested-name-specifier", decl);
8086 if (decl_context != FIELD)
8088 if (!current_function_decl)
8089 DECL_CONTEXT (decl) = FROB_CONTEXT (current_namespace);
8090 else if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (current_function_decl)
8091 || (DECL_MAYBE_IN_CHARGE_DESTRUCTOR_P
8092 (current_function_decl)))
8093 /* The TYPE_DECL is "abstract" because there will be
8094 clones of this constructor/destructor, and there will
8095 be copies of this TYPE_DECL generated in those
8097 DECL_ABSTRACT (decl) = 1;
8099 else if (constructor_name_p (unqualified_id, current_class_type))
8100 pedwarn ("ISO C++ forbids nested type %qD with same name "
8101 "as enclosing class",
8104 /* If the user declares "typedef struct {...} foo" then the
8105 struct will have an anonymous name. Fill that name in now.
8106 Nothing can refer to it, so nothing needs know about the name
8108 if (type != error_mark_node
8111 && TREE_CODE (TYPE_NAME (type)) == TYPE_DECL
8112 && TYPE_ANONYMOUS_P (type)
8113 /* Don't do this if there are attributes. */
8114 && (!attrlist || !*attrlist)
8115 && cp_type_quals (type) == TYPE_UNQUALIFIED)
8117 tree oldname = TYPE_NAME (type);
8120 /* Replace the anonymous name with the real name everywhere. */
8121 for (t = TYPE_MAIN_VARIANT (type); t; t = TYPE_NEXT_VARIANT (t))
8122 if (TYPE_NAME (t) == oldname)
8123 TYPE_NAME (t) = decl;
8125 if (TYPE_LANG_SPECIFIC (type))
8126 TYPE_WAS_ANONYMOUS (type) = 1;
8128 /* If this is a typedef within a template class, the nested
8129 type is a (non-primary) template. The name for the
8130 template needs updating as well. */
8131 if (TYPE_LANG_SPECIFIC (type) && CLASSTYPE_TEMPLATE_INFO (type))
8132 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type))
8133 = TYPE_IDENTIFIER (type);
8135 /* FIXME remangle member functions; member functions of a
8136 type with external linkage have external linkage. */
8139 /* Any qualifiers on a function type typedef have already been
8141 if (memfn_quals && !ctype && TREE_CODE (type) == FUNCTION_TYPE)
8142 memfn_quals = TYPE_UNQUALIFIED;
8145 || (typedef_decl && C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl)))
8146 C_TYPEDEF_EXPLICITLY_SIGNED (decl) = 1;
8148 bad_specifiers (decl, "type", virtualp,
8149 memfn_quals != TYPE_UNQUALIFIED,
8150 inlinep, friendp, raises != NULL_TREE);
8155 /* Detect the case of an array type of unspecified size
8156 which came, as such, direct from a typedef name.
8157 We must copy the type, so that the array's domain can be
8158 individually set by the object's initializer. */
8160 if (type && typedef_type
8161 && TREE_CODE (type) == ARRAY_TYPE && !TYPE_DOMAIN (type)
8162 && TYPE_MAIN_VARIANT (type) == TYPE_MAIN_VARIANT (typedef_type))
8163 type = build_cplus_array_type (TREE_TYPE (type), NULL_TREE);
8165 /* Detect where we're using a typedef of function type to declare a
8166 function. PARMS will not be set, so we must create it now. */
8168 if (type == typedef_type && TREE_CODE (type) == FUNCTION_TYPE)
8170 tree decls = NULL_TREE;
8173 for (args = TYPE_ARG_TYPES (type); args; args = TREE_CHAIN (args))
8175 tree decl = cp_build_parm_decl (NULL_TREE, TREE_VALUE (args));
8177 TREE_CHAIN (decl) = decls;
8181 parms = nreverse (decls);
8183 if (decl_context != TYPENAME)
8185 /* A cv-qualifier-seq shall only be part of the function type
8186 for a non-static member function. [8.3.5/4 dcl.fct] */
8187 if (cp_type_quals (type) != TYPE_UNQUALIFIED
8188 && (current_class_type == NULL_TREE || staticp) )
8190 error ("qualified function types cannot be used to declare %s functions",
8191 (staticp? "static member" : "free"));
8192 type = TYPE_MAIN_VARIANT (type);
8195 /* The qualifiers on the function type become the qualifiers on
8196 the non-static member function. */
8197 memfn_quals |= cp_type_quals (type);
8201 /* If this is a type name (such as, in a cast or sizeof),
8202 compute the type and return it now. */
8204 if (decl_context == TYPENAME)
8206 /* Note that the grammar rejects storage classes
8207 in typenames, fields or parameters. */
8208 if (type_quals != TYPE_UNQUALIFIED)
8209 type_quals = TYPE_UNQUALIFIED;
8211 /* Special case: "friend class foo" looks like a TYPENAME context. */
8214 if (type_quals != TYPE_UNQUALIFIED)
8216 error ("type qualifiers specified for friend class declaration");
8217 type_quals = TYPE_UNQUALIFIED;
8221 error ("%<inline%> specified for friend class declaration");
8227 /* Don't allow friend declaration without a class-key. */
8228 if (TREE_CODE (type) == TEMPLATE_TYPE_PARM)
8229 pedwarn ("template parameters cannot be friends");
8230 else if (TREE_CODE (type) == TYPENAME_TYPE)
8231 pedwarn ("friend declaration requires class-key, "
8232 "i.e. %<friend class %T::%D%>",
8233 TYPE_CONTEXT (type), TYPENAME_TYPE_FULLNAME (type));
8235 pedwarn ("friend declaration requires class-key, "
8236 "i.e. %<friend %#T%>",
8240 /* Only try to do this stuff if we didn't already give up. */
8241 if (type != integer_type_node)
8243 /* A friendly class? */
8244 if (current_class_type)
8245 make_friend_class (current_class_type, TYPE_MAIN_VARIANT (type),
8248 error ("trying to make class %qT a friend of global scope",
8251 type = void_type_node;
8254 else if (memfn_quals)
8256 if (ctype == NULL_TREE)
8258 if (TREE_CODE (type) != METHOD_TYPE)
8259 error ("invalid qualifiers on non-member function type");
8261 ctype = TYPE_METHOD_BASETYPE (type);
8264 type = build_memfn_type (type, ctype, memfn_quals);
8269 else if (unqualified_id == NULL_TREE && decl_context != PARM
8270 && decl_context != CATCHPARM
8271 && TREE_CODE (type) != UNION_TYPE
8274 error ("abstract declarator %qT used as declaration", type);
8275 return error_mark_node;
8278 /* Only functions may be declared using an operator-function-id. */
8280 && IDENTIFIER_OPNAME_P (unqualified_id)
8281 && TREE_CODE (type) != FUNCTION_TYPE
8282 && TREE_CODE (type) != METHOD_TYPE)
8284 error ("declaration of %qD as non-function", unqualified_id);
8285 return error_mark_node;
8288 /* We don't check parameter types here because we can emit a better
8289 error message later. */
8290 if (decl_context != PARM)
8292 type = check_var_type (unqualified_id, type);
8293 if (type == error_mark_node)
8294 return error_mark_node;
8297 /* Now create the decl, which may be a VAR_DECL, a PARM_DECL
8298 or a FUNCTION_DECL, depending on DECL_CONTEXT and TYPE. */
8300 if (decl_context == PARM || decl_context == CATCHPARM)
8302 if (ctype || in_namespace)
8303 error ("cannot use %<::%> in parameter declaration");
8305 /* A parameter declared as an array of T is really a pointer to T.
8306 One declared as a function is really a pointer to a function.
8307 One declared as a member is really a pointer to member. */
8309 if (TREE_CODE (type) == ARRAY_TYPE)
8311 /* Transfer const-ness of array into that of type pointed to. */
8312 type = build_pointer_type (TREE_TYPE (type));
8313 type_quals = TYPE_UNQUALIFIED;
8315 else if (TREE_CODE (type) == FUNCTION_TYPE)
8316 type = build_pointer_type (type);
8322 if (decl_context == PARM)
8324 decl = cp_build_parm_decl (unqualified_id, type);
8326 bad_specifiers (decl, "parameter", virtualp,
8327 memfn_quals != TYPE_UNQUALIFIED,
8328 inlinep, friendp, raises != NULL_TREE);
8330 else if (decl_context == FIELD)
8332 /* The C99 flexible array extension. */
8333 if (!staticp && TREE_CODE (type) == ARRAY_TYPE
8334 && TYPE_DOMAIN (type) == NULL_TREE)
8336 tree itype = compute_array_index_type (dname, integer_zero_node);
8337 type = build_cplus_array_type (TREE_TYPE (type), itype);
8340 if (type == error_mark_node)
8342 /* Happens when declaring arrays of sizes which
8343 are error_mark_node, for example. */
8346 else if (in_namespace && !friendp)
8348 /* Something like struct S { int N::j; }; */
8349 error ("invalid use of %<::%>");
8350 return error_mark_node;
8352 else if (TREE_CODE (type) == FUNCTION_TYPE)
8355 tree function_context;
8359 if (ctype == NULL_TREE)
8360 ctype = current_class_type;
8362 if (ctype == NULL_TREE)
8364 error ("can't make %qD into a method -- not in a class",
8366 return error_mark_node;
8369 /* ``A union may [ ... ] not [ have ] virtual functions.''
8371 if (virtualp && TREE_CODE (ctype) == UNION_TYPE)
8373 error ("function %qD declared virtual inside a union",
8375 return error_mark_node;
8378 if (NEW_DELETE_OPNAME_P (unqualified_id))
8382 error ("%qD cannot be declared virtual, since it "
8388 else if (staticp < 2)
8389 type = build_memfn_type (type, ctype, memfn_quals);
8392 /* Check that the name used for a destructor makes sense. */
8393 if (sfk == sfk_destructor)
8397 gcc_assert (friendp);
8398 error ("expected qualified name in friend declaration "
8399 "for destructor %qD",
8400 id_declarator->u.id.unqualified_name);
8401 return error_mark_node;
8404 if (!same_type_p (TREE_OPERAND
8405 (id_declarator->u.id.unqualified_name, 0),
8408 error ("declaration of %qD as member of %qT",
8409 id_declarator->u.id.unqualified_name, ctype);
8410 return error_mark_node;
8414 /* Tell grokfndecl if it needs to set TREE_PUBLIC on the node. */
8415 function_context = (ctype != NULL_TREE) ?
8416 decl_function_context (TYPE_MAIN_DECL (ctype)) : NULL_TREE;
8417 publicp = (! friendp || ! staticp)
8418 && function_context == NULL_TREE;
8419 decl = grokfndecl (ctype, type,
8420 TREE_CODE (unqualified_id) != TEMPLATE_ID_EXPR
8421 ? unqualified_id : dname,
8424 virtualp, flags, memfn_quals, raises,
8425 friendp ? -1 : 0, friendp, publicp, inlinep,
8427 funcdef_flag, template_count, in_namespace, attrlist);
8428 if (decl == NULL_TREE)
8429 return error_mark_node;
8431 /* This clobbers the attrs stored in `decl' from `attrlist'. */
8432 /* The decl and setting of decl_attr is also turned off. */
8433 decl = build_decl_attribute_variant (decl, decl_attr);
8436 /* [class.conv.ctor]
8438 A constructor declared without the function-specifier
8439 explicit that can be called with a single parameter
8440 specifies a conversion from the type of its first
8441 parameter to the type of its class. Such a constructor
8442 is called a converting constructor. */
8444 DECL_NONCONVERTING_P (decl) = 1;
8445 else if (DECL_CONSTRUCTOR_P (decl))
8447 /* The constructor can be called with exactly one
8448 parameter if there is at least one parameter, and
8449 any subsequent parameters have default arguments.
8450 Ignore any compiler-added parms. */
8451 tree arg_types = FUNCTION_FIRST_USER_PARMTYPE (decl);
8453 if (arg_types == void_list_node
8455 && TREE_CHAIN (arg_types)
8456 && TREE_CHAIN (arg_types) != void_list_node
8457 && !TREE_PURPOSE (TREE_CHAIN (arg_types))))
8458 DECL_NONCONVERTING_P (decl) = 1;
8461 else if (TREE_CODE (type) == METHOD_TYPE)
8463 /* We only get here for friend declarations of
8464 members of other classes. */
8465 /* All method decls are public, so tell grokfndecl to set
8466 TREE_PUBLIC, also. */
8467 decl = grokfndecl (ctype, type,
8468 TREE_CODE (unqualified_id) != TEMPLATE_ID_EXPR
8469 ? unqualified_id : dname,
8472 virtualp, flags, memfn_quals, raises,
8473 friendp ? -1 : 0, friendp, 1, 0, sfk,
8474 funcdef_flag, template_count, in_namespace,
8476 if (decl == NULL_TREE)
8477 return error_mark_node;
8479 else if (!staticp && !dependent_type_p (type)
8480 && !COMPLETE_TYPE_P (complete_type (type))
8481 && (TREE_CODE (type) != ARRAY_TYPE || initialized == 0))
8484 error ("field %qD has incomplete type", unqualified_id);
8486 error ("name %qT has incomplete type", type);
8488 /* If we're instantiating a template, tell them which
8489 instantiation made the field's type be incomplete. */
8490 if (current_class_type
8491 && TYPE_NAME (current_class_type)
8492 && IDENTIFIER_TEMPLATE (TYPE_IDENTIFIER (current_class_type))
8494 && declspecs->type == type)
8495 error (" in instantiation of template %qT",
8496 current_class_type);
8498 return error_mark_node;
8504 error ("%qE is neither function nor member function; "
8505 "cannot be declared friend", unqualified_id);
8513 /* Friends are treated specially. */
8514 if (ctype == current_class_type)
8515 ; /* We already issued a pedwarn. */
8516 else if (decl && DECL_NAME (decl))
8518 if (template_class_depth (current_class_type) == 0)
8520 decl = check_explicit_specialization
8521 (unqualified_id, decl, template_count,
8522 2 * funcdef_flag + 4);
8523 if (decl == error_mark_node)
8524 return error_mark_node;
8527 decl = do_friend (ctype, unqualified_id, decl,
8533 return error_mark_node;
8536 /* Structure field. It may not be a function, except for C++. */
8538 if (decl == NULL_TREE)
8544 /* An attempt is being made to initialize a non-static
8545 member. But, from [class.mem]:
8547 4 A member-declarator can contain a
8548 constant-initializer only if it declares a static
8549 member (_class.static_) of integral or enumeration
8550 type, see _class.static.data_.
8552 This used to be relatively common practice, but
8553 the rest of the compiler does not correctly
8554 handle the initialization unless the member is
8555 static so we make it static below. */
8556 pedwarn ("ISO C++ forbids initialization of member %qD",
8558 pedwarn ("making %qD static", unqualified_id);
8562 if (uses_template_parms (type))
8563 /* We'll check at instantiation time. */
8565 else if (check_static_variable_definition (unqualified_id,
8567 /* If we just return the declaration, crashes
8568 will sometimes occur. We therefore return
8569 void_type_node, as if this was a friend
8570 declaration, to cause callers to completely
8571 ignore this declaration. */
8572 return error_mark_node;
8577 /* C++ allows static class members. All other work
8578 for this is done by grokfield. */
8579 decl = build_lang_decl (VAR_DECL, unqualified_id, type);
8580 set_linkage_for_static_data_member (decl);
8581 /* Even if there is an in-class initialization, DECL
8582 is considered undefined until an out-of-class
8583 definition is provided. */
8584 DECL_EXTERNAL (decl) = 1;
8588 if (targetm.have_tls)
8589 DECL_TLS_MODEL (decl) = decl_default_tls_model (decl);
8591 /* A mere warning is sure to result in improper
8592 semantics at runtime. Don't bother to allow this to
8594 error ("thread-local storage not supported for this target");
8599 decl = build_decl (FIELD_DECL, unqualified_id, type);
8600 DECL_NONADDRESSABLE_P (decl) = bitfield;
8601 if (storage_class == sc_mutable)
8603 DECL_MUTABLE_P (decl) = 1;
8604 storage_class = sc_none;
8608 bad_specifiers (decl, "field", virtualp,
8609 memfn_quals != TYPE_UNQUALIFIED,
8610 inlinep, friendp, raises != NULL_TREE);
8613 else if (TREE_CODE (type) == FUNCTION_TYPE
8614 || TREE_CODE (type) == METHOD_TYPE)
8619 if (!unqualified_id)
8620 return error_mark_node;
8622 if (TREE_CODE (unqualified_id) == TEMPLATE_ID_EXPR)
8623 original_name = dname;
8625 original_name = unqualified_id;
8627 if (storage_class == sc_auto)
8628 error ("storage class %<auto%> invalid for function %qs", name);
8629 else if (storage_class == sc_register)
8630 error ("storage class %<register%> invalid for function %qs", name);
8632 error ("storage class %<__thread%> invalid for function %qs", name);
8634 /* Function declaration not at top level.
8635 Storage classes other than `extern' are not allowed
8636 and `extern' makes no difference. */
8637 if (! toplevel_bindings_p ()
8638 && (storage_class == sc_static
8639 || declspecs->specs[(int)ds_inline])
8642 if (storage_class == sc_static)
8643 pedwarn ("%<static%> specified invalid for function %qs "
8644 "declared out of global scope", name);
8646 pedwarn ("%<inline%> specifier invalid for function %qs "
8647 "declared out of global scope", name);
8650 if (ctype == NULL_TREE)
8654 error ("virtual non-class function %qs", name);
8658 else if (TREE_CODE (type) == FUNCTION_TYPE && staticp < 2
8659 && !NEW_DELETE_OPNAME_P (original_name))
8660 type = build_method_type_directly (ctype,
8662 TYPE_ARG_TYPES (type));
8664 /* Record presence of `static'. */
8665 publicp = (ctype != NULL_TREE
8666 || storage_class == sc_extern
8667 || storage_class != sc_static);
8669 decl = grokfndecl (ctype, type, original_name, parms, unqualified_id,
8670 virtualp, flags, memfn_quals, raises,
8672 publicp, inlinep, sfk, funcdef_flag,
8673 template_count, in_namespace, attrlist);
8674 if (decl == NULL_TREE)
8675 return error_mark_node;
8679 int invalid_static = 0;
8681 /* Don't allow a static member function in a class, and forbid
8682 declaring main to be static. */
8683 if (TREE_CODE (type) == METHOD_TYPE)
8685 pedwarn ("cannot declare member function %qD to have "
8686 "static linkage", decl);
8689 else if (current_function_decl)
8691 /* FIXME need arm citation */
8692 error ("cannot declare static function inside another function");
8699 storage_class = sc_none;
8705 /* It's a variable. */
8707 /* An uninitialized decl with `extern' is a reference. */
8708 decl = grokvardecl (type, unqualified_id,
8711 (type_quals & TYPE_QUAL_CONST) != 0,
8712 ctype ? ctype : in_namespace);
8713 bad_specifiers (decl, "variable", virtualp,
8714 memfn_quals != TYPE_UNQUALIFIED,
8715 inlinep, friendp, raises != NULL_TREE);
8719 DECL_CONTEXT (decl) = ctype;
8722 pedwarn ("%<static%> may not be used when defining "
8723 "(as opposed to declaring) a static data member");
8725 storage_class = sc_none;
8727 if (storage_class == sc_register && TREE_STATIC (decl))
8729 error ("static member %qD declared %<register%>", decl);
8730 storage_class = sc_none;
8732 if (storage_class == sc_extern && pedantic)
8734 pedwarn ("cannot explicitly declare member %q#D to have "
8737 storage_class = sc_none;
8742 /* Record `register' declaration for warnings on &
8743 and in case doing stupid register allocation. */
8745 if (storage_class == sc_register)
8746 DECL_REGISTER (decl) = 1;
8747 else if (storage_class == sc_extern)
8748 DECL_THIS_EXTERN (decl) = 1;
8749 else if (storage_class == sc_static)
8750 DECL_THIS_STATIC (decl) = 1;
8752 /* Record constancy and volatility. There's no need to do this
8753 when processing a template; we'll do this for the instantiated
8754 declaration based on the type of DECL. */
8755 if (!processing_template_decl)
8756 cp_apply_type_quals_to_decl (type_quals, decl);
8762 /* Subroutine of start_function. Ensure that each of the parameter
8763 types (as listed in PARMS) is complete, as is required for a
8764 function definition. */
8767 require_complete_types_for_parms (tree parms)
8769 for (; parms; parms = TREE_CHAIN (parms))
8771 if (dependent_type_p (TREE_TYPE (parms)))
8773 if (!VOID_TYPE_P (TREE_TYPE (parms))
8774 && complete_type_or_else (TREE_TYPE (parms), parms))
8776 relayout_decl (parms);
8777 DECL_ARG_TYPE (parms) = type_passed_as (TREE_TYPE (parms));
8780 /* grokparms or complete_type_or_else will have already issued
8782 TREE_TYPE (parms) = error_mark_node;
8786 /* Returns nonzero if T is a local variable. */
8789 local_variable_p (tree t)
8791 if ((TREE_CODE (t) == VAR_DECL
8792 /* A VAR_DECL with a context that is a _TYPE is a static data
8794 && !TYPE_P (CP_DECL_CONTEXT (t))
8795 /* Any other non-local variable must be at namespace scope. */
8796 && !DECL_NAMESPACE_SCOPE_P (t))
8797 || (TREE_CODE (t) == PARM_DECL))
8803 /* Returns nonzero if T is an automatic local variable or a label.
8804 (These are the declarations that need to be remapped when the code
8805 containing them is duplicated.) */
8808 nonstatic_local_decl_p (tree t)
8810 return ((local_variable_p (t) && !TREE_STATIC (t))
8811 || TREE_CODE (t) == LABEL_DECL
8812 || TREE_CODE (t) == RESULT_DECL);
8815 /* Like local_variable_p, but suitable for use as a tree-walking
8819 local_variable_p_walkfn (tree *tp, int *walk_subtrees,
8820 void *data ATTRIBUTE_UNUSED)
8822 if (local_variable_p (*tp) && !DECL_ARTIFICIAL (*tp))
8824 else if (TYPE_P (*tp))
8831 /* Check that ARG, which is a default-argument expression for a
8832 parameter DECL, is valid. Returns ARG, or ERROR_MARK_NODE, if
8833 something goes wrong. DECL may also be a _TYPE node, rather than a
8834 DECL, if there is no DECL available. */
8837 check_default_argument (tree decl, tree arg)
8842 if (TREE_CODE (arg) == DEFAULT_ARG)
8843 /* We get a DEFAULT_ARG when looking at an in-class declaration
8844 with a default argument. Ignore the argument for now; we'll
8845 deal with it after the class is complete. */
8854 decl_type = TREE_TYPE (decl);
8856 if (arg == error_mark_node
8857 || decl == error_mark_node
8858 || TREE_TYPE (arg) == error_mark_node
8859 || decl_type == error_mark_node)
8860 /* Something already went wrong. There's no need to check
8862 return error_mark_node;
8864 /* [dcl.fct.default]
8866 A default argument expression is implicitly converted to the
8868 if (!TREE_TYPE (arg)
8869 || !can_convert_arg (decl_type, TREE_TYPE (arg), arg, LOOKUP_NORMAL))
8872 error ("default argument for %q#D has type %qT",
8873 decl, TREE_TYPE (arg));
8875 error ("default argument for parameter of type %qT has type %qT",
8876 decl_type, TREE_TYPE (arg));
8878 return error_mark_node;
8881 /* [dcl.fct.default]
8883 Local variables shall not be used in default argument
8886 The keyword `this' shall not be used in a default argument of a
8888 var = walk_tree_without_duplicates (&arg, local_variable_p_walkfn,
8892 error ("default argument %qE uses local variable %qD", arg, var);
8893 return error_mark_node;
8900 /* Decode the list of parameter types for a function type.
8901 Given the list of things declared inside the parens,
8902 return a list of types.
8904 If this parameter does not end with an ellipsis, we append
8907 *PARMS is set to the chain of PARM_DECLs created. */
8910 grokparms (cp_parameter_declarator *first_parm, tree *parms)
8912 tree result = NULL_TREE;
8913 tree decls = NULL_TREE;
8914 int ellipsis = !first_parm || first_parm->ellipsis_p;
8915 cp_parameter_declarator *parm;
8918 for (parm = first_parm; parm != NULL; parm = parm->next)
8920 tree type = NULL_TREE;
8921 tree init = parm->default_argument;
8925 if (parm == no_parameters)
8928 attrs = parm->decl_specifiers.attributes;
8929 parm->decl_specifiers.attributes = NULL_TREE;
8930 decl = grokdeclarator (parm->declarator, &parm->decl_specifiers,
8931 PARM, init != NULL_TREE, &attrs);
8932 if (! decl || TREE_TYPE (decl) == error_mark_node)
8936 cplus_decl_attributes (&decl, attrs, 0);
8938 type = TREE_TYPE (decl);
8939 if (VOID_TYPE_P (type))
8941 if (same_type_p (type, void_type_node)
8942 && DECL_SELF_REFERENCE_P (type)
8943 && !DECL_NAME (decl) && !result && !parm->next && !ellipsis)
8944 /* this is a parmlist of `(void)', which is ok. */
8946 cxx_incomplete_type_error (decl, type);
8947 /* It's not a good idea to actually create parameters of
8948 type `void'; other parts of the compiler assume that a
8949 void type terminates the parameter list. */
8950 type = error_mark_node;
8951 TREE_TYPE (decl) = error_mark_node;
8954 if (type != error_mark_node)
8956 /* Top-level qualifiers on the parameters are
8957 ignored for function types. */
8958 type = cp_build_qualified_type (type, 0);
8959 if (TREE_CODE (type) == METHOD_TYPE)
8961 error ("parameter %qD invalidly declared method type", decl);
8962 type = build_pointer_type (type);
8963 TREE_TYPE (decl) = type;
8965 else if (abstract_virtuals_error (decl, type))
8966 any_error = 1; /* Seems like a good idea. */
8967 else if (POINTER_TYPE_P (type))
8969 /* [dcl.fct]/6, parameter types cannot contain pointers
8970 (references) to arrays of unknown bound. */
8971 tree t = TREE_TYPE (type);
8972 int ptr = TYPE_PTR_P (type);
8978 else if (TREE_CODE (t) != ARRAY_TYPE)
8980 else if (!TYPE_DOMAIN (t))
8984 if (TREE_CODE (t) == ARRAY_TYPE)
8985 error ("parameter %qD includes %s to array of unknown "
8987 decl, ptr ? "pointer" : "reference", t);
8992 else if (init && !processing_template_decl)
8993 init = check_default_argument (decl, init);
8996 TREE_CHAIN (decl) = decls;
8998 result = tree_cons (init, type, result);
9000 decls = nreverse (decls);
9001 result = nreverse (result);
9003 result = chainon (result, void_list_node);
9010 /* D is a constructor or overloaded `operator='.
9012 Let T be the class in which D is declared. Then, this function
9015 -1 if D's is an ill-formed constructor or copy assignment operator
9016 whose first parameter is of type `T'.
9017 0 if D is not a copy constructor or copy assignment
9019 1 if D is a copy constructor or copy assignment operator whose
9020 first parameter is a reference to const qualified T.
9021 2 if D is a copy constructor or copy assignment operator whose
9022 first parameter is a reference to non-const qualified T.
9024 This function can be used as a predicate. Positive values indicate
9025 a copy constructor and nonzero values indicate a copy assignment
9035 gcc_assert (DECL_FUNCTION_MEMBER_P (d));
9037 if (TREE_CODE (d) == TEMPLATE_DECL
9038 || (DECL_TEMPLATE_INFO (d)
9039 && DECL_MEMBER_TEMPLATE_P (DECL_TI_TEMPLATE (d))))
9040 /* Instantiations of template member functions are never copy
9041 functions. Note that member functions of templated classes are
9042 represented as template functions internally, and we must
9043 accept those as copy functions. */
9046 args = FUNCTION_FIRST_USER_PARMTYPE (d);
9050 arg_type = TREE_VALUE (args);
9051 if (arg_type == error_mark_node)
9054 if (TYPE_MAIN_VARIANT (arg_type) == DECL_CONTEXT (d))
9056 /* Pass by value copy assignment operator. */
9059 else if (TREE_CODE (arg_type) == REFERENCE_TYPE
9060 && TYPE_MAIN_VARIANT (TREE_TYPE (arg_type)) == DECL_CONTEXT (d))
9062 if (CP_TYPE_CONST_P (TREE_TYPE (arg_type)))
9068 args = TREE_CHAIN (args);
9070 if (args && args != void_list_node && !TREE_PURPOSE (args))
9071 /* There are more non-optional args. */
9077 /* Remember any special properties of member function DECL. */
9079 void grok_special_member_properties (tree decl)
9083 if (!DECL_NONSTATIC_MEMBER_FUNCTION_P (decl))
9086 class_type = DECL_CONTEXT (decl);
9087 if (DECL_CONSTRUCTOR_P (decl))
9089 int ctor = copy_fn_p (decl);
9091 TYPE_HAS_CONSTRUCTOR (class_type) = 1;
9097 A non-template constructor for class X is a copy
9098 constructor if its first parameter is of type X&, const
9099 X&, volatile X& or const volatile X&, and either there
9100 are no other parameters or else all other parameters have
9101 default arguments. */
9102 TYPE_HAS_INIT_REF (class_type) = 1;
9104 TYPE_HAS_CONST_INIT_REF (class_type) = 1;
9106 else if (sufficient_parms_p (FUNCTION_FIRST_USER_PARMTYPE (decl)))
9107 TYPE_HAS_DEFAULT_CONSTRUCTOR (class_type) = 1;
9109 else if (DECL_OVERLOADED_OPERATOR_P (decl) == NOP_EXPR)
9113 A non-template assignment operator for class X is a copy
9114 assignment operator if its parameter is of type X, X&, const
9115 X&, volatile X& or const volatile X&. */
9117 int assop = copy_fn_p (decl);
9121 TYPE_HAS_ASSIGN_REF (class_type) = 1;
9123 TYPE_HAS_CONST_ASSIGN_REF (class_type) = 1;
9128 /* Check a constructor DECL has the correct form. Complains
9129 if the class has a constructor of the form X(X). */
9132 grok_ctor_properties (tree ctype, tree decl)
9134 int ctor_parm = copy_fn_p (decl);
9140 A declaration of a constructor for a class X is ill-formed if
9141 its first parameter is of type (optionally cv-qualified) X
9142 and either there are no other parameters or else all other
9143 parameters have default arguments.
9145 We *don't* complain about member template instantiations that
9146 have this form, though; they can occur as we try to decide
9147 what constructor to use during overload resolution. Since
9148 overload resolution will never prefer such a constructor to
9149 the non-template copy constructor (which is either explicitly
9150 or implicitly defined), there's no need to worry about their
9151 existence. Theoretically, they should never even be
9152 instantiated, but that's hard to forestall. */
9153 error ("invalid constructor; you probably meant %<%T (const %T&)%>",
9161 /* An operator with this code is unary, but can also be binary. */
9164 ambi_op_p (enum tree_code code)
9166 return (code == INDIRECT_REF
9167 || code == ADDR_EXPR
9168 || code == UNARY_PLUS_EXPR
9169 || code == NEGATE_EXPR
9170 || code == PREINCREMENT_EXPR
9171 || code == PREDECREMENT_EXPR);
9174 /* An operator with this name can only be unary. */
9177 unary_op_p (enum tree_code code)
9179 return (code == TRUTH_NOT_EXPR
9180 || code == BIT_NOT_EXPR
9181 || code == COMPONENT_REF
9182 || code == TYPE_EXPR);
9185 /* DECL is a declaration for an overloaded operator. If COMPLAIN is true,
9186 errors are issued for invalid declarations. */
9189 grok_op_properties (tree decl, bool complain)
9191 tree argtypes = TYPE_ARG_TYPES (TREE_TYPE (decl));
9193 int methodp = (TREE_CODE (TREE_TYPE (decl)) == METHOD_TYPE);
9194 tree name = DECL_NAME (decl);
9195 enum tree_code operator_code;
9200 /* Count the number of arguments and check for ellipsis. */
9201 for (argtype = argtypes, arity = 0;
9202 argtype && argtype != void_list_node;
9203 argtype = TREE_CHAIN (argtype))
9205 ellipsis_p = !argtype;
9207 class_type = DECL_CONTEXT (decl);
9208 if (class_type && !CLASS_TYPE_P (class_type))
9209 class_type = NULL_TREE;
9211 if (DECL_CONV_FN_P (decl))
9212 operator_code = TYPE_EXPR;
9216 #define DEF_OPERATOR(NAME, CODE, MANGLING, ARITY, ASSN_P) \
9217 if (ansi_opname (CODE) == name) \
9219 operator_code = (CODE); \
9222 else if (ansi_assopname (CODE) == name) \
9224 operator_code = (CODE); \
9225 DECL_ASSIGNMENT_OPERATOR_P (decl) = 1; \
9229 #include "operators.def"
9235 gcc_assert (operator_code != LAST_CPLUS_TREE_CODE);
9236 SET_OVERLOADED_OPERATOR_CODE (decl, operator_code);
9239 switch (operator_code)
9242 TYPE_HAS_NEW_OPERATOR (class_type) = 1;
9246 TYPE_GETS_DELETE (class_type) |= 1;
9250 TYPE_HAS_ARRAY_NEW_OPERATOR (class_type) = 1;
9253 case VEC_DELETE_EXPR:
9254 TYPE_GETS_DELETE (class_type) |= 2;
9261 /* [basic.std.dynamic.allocation]/1:
9263 A program is ill-formed if an allocation function is declared
9264 in a namespace scope other than global scope or declared static
9267 The same also holds true for deallocation functions. */
9268 if (operator_code == NEW_EXPR || operator_code == VEC_NEW_EXPR
9269 || operator_code == DELETE_EXPR || operator_code == VEC_DELETE_EXPR)
9271 if (DECL_NAMESPACE_SCOPE_P (decl))
9273 if (CP_DECL_CONTEXT (decl) != global_namespace)
9275 error ("%qD may not be declared within a namespace", decl);
9278 else if (!TREE_PUBLIC (decl))
9280 error ("%qD may not be declared as static", decl);
9286 if (operator_code == NEW_EXPR || operator_code == VEC_NEW_EXPR)
9287 TREE_TYPE (decl) = coerce_new_type (TREE_TYPE (decl));
9288 else if (operator_code == DELETE_EXPR || operator_code == VEC_DELETE_EXPR)
9289 TREE_TYPE (decl) = coerce_delete_type (TREE_TYPE (decl));
9292 /* An operator function must either be a non-static member function
9293 or have at least one parameter of a class, a reference to a class,
9294 an enumeration, or a reference to an enumeration. 13.4.0.6 */
9295 if (! methodp || DECL_STATIC_FUNCTION_P (decl))
9297 if (operator_code == TYPE_EXPR
9298 || operator_code == CALL_EXPR
9299 || operator_code == COMPONENT_REF
9300 || operator_code == ARRAY_REF
9301 || operator_code == NOP_EXPR)
9303 error ("%qD must be a nonstatic member function", decl);
9310 if (DECL_STATIC_FUNCTION_P (decl))
9312 error ("%qD must be either a non-static member "
9313 "function or a non-member function", decl);
9317 for (p = argtypes; p && p != void_list_node; p = TREE_CHAIN (p))
9319 tree arg = non_reference (TREE_VALUE (p));
9320 if (arg == error_mark_node)
9323 /* IS_AGGR_TYPE, rather than CLASS_TYPE_P, is used
9324 because these checks are performed even on
9325 template functions. */
9326 if (IS_AGGR_TYPE (arg) || TREE_CODE (arg) == ENUMERAL_TYPE)
9330 if (!p || p == void_list_node)
9333 error ("%qD must have an argument of class or "
9334 "enumerated type", decl);
9340 /* There are no restrictions on the arguments to an overloaded
9342 if (operator_code == CALL_EXPR)
9345 /* Warn about conversion operators that will never be used. */
9346 if (IDENTIFIER_TYPENAME_P (name)
9347 && ! DECL_TEMPLATE_INFO (decl)
9349 /* Warn only declaring the function; there is no need to
9350 warn again about out-of-class definitions. */
9351 && class_type == current_class_type)
9353 tree t = TREE_TYPE (name);
9354 int ref = (TREE_CODE (t) == REFERENCE_TYPE);
9355 const char *what = 0;
9358 t = TYPE_MAIN_VARIANT (TREE_TYPE (t));
9360 if (TREE_CODE (t) == VOID_TYPE)
9362 else if (class_type)
9364 if (t == class_type)
9365 what = "the same type";
9366 /* Don't force t to be complete here. */
9367 else if (IS_AGGR_TYPE (t)
9368 && COMPLETE_TYPE_P (t)
9369 && DERIVED_FROM_P (t, class_type))
9370 what = "a base class";
9374 warning (OPT_Wconversion, "conversion to %s%s will never use a type "
9375 "conversion operator",
9376 ref ? "a reference to " : "", what);
9379 if (operator_code == COND_EXPR)
9382 error ("ISO C++ prohibits overloading operator ?:");
9385 else if (ellipsis_p)
9387 error ("%qD must not have variable number of arguments", decl);
9390 else if (ambi_op_p (operator_code))
9393 /* We pick the one-argument operator codes by default, so
9394 we don't have to change anything. */
9396 else if (arity == 2)
9398 /* If we thought this was a unary operator, we now know
9399 it to be a binary operator. */
9400 switch (operator_code)
9403 operator_code = MULT_EXPR;
9407 operator_code = BIT_AND_EXPR;
9410 case UNARY_PLUS_EXPR:
9411 operator_code = PLUS_EXPR;
9415 operator_code = MINUS_EXPR;
9418 case PREINCREMENT_EXPR:
9419 operator_code = POSTINCREMENT_EXPR;
9422 case PREDECREMENT_EXPR:
9423 operator_code = POSTDECREMENT_EXPR;
9430 SET_OVERLOADED_OPERATOR_CODE (decl, operator_code);
9432 if ((operator_code == POSTINCREMENT_EXPR
9433 || operator_code == POSTDECREMENT_EXPR)
9434 && ! processing_template_decl
9435 && ! same_type_p (TREE_VALUE (TREE_CHAIN (argtypes)), integer_type_node))
9438 error ("postfix %qD must take %<int%> as its argument",
9441 error ("postfix %qD must take %<int%> as its second "
9449 error ("%qD must take either zero or one argument", decl);
9451 error ("%qD must take either one or two arguments", decl);
9455 /* More Effective C++ rule 6. */
9457 && (operator_code == POSTINCREMENT_EXPR
9458 || operator_code == POSTDECREMENT_EXPR
9459 || operator_code == PREINCREMENT_EXPR
9460 || operator_code == PREDECREMENT_EXPR))
9462 tree arg = TREE_VALUE (argtypes);
9463 tree ret = TREE_TYPE (TREE_TYPE (decl));
9464 if (methodp || TREE_CODE (arg) == REFERENCE_TYPE)
9465 arg = TREE_TYPE (arg);
9466 arg = TYPE_MAIN_VARIANT (arg);
9467 if (operator_code == PREINCREMENT_EXPR
9468 || operator_code == PREDECREMENT_EXPR)
9470 if (TREE_CODE (ret) != REFERENCE_TYPE
9471 || !same_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (ret)),
9473 warning (OPT_Weffc__, "prefix %qD should return %qT", decl,
9474 build_reference_type (arg));
9478 if (!same_type_p (TYPE_MAIN_VARIANT (ret), arg))
9479 warning (OPT_Weffc__, "postfix %qD should return %qT", decl, arg);
9483 else if (unary_op_p (operator_code))
9488 error ("%qD must take %<void%>", decl);
9490 error ("%qD must take exactly one argument", decl);
9494 else /* if (binary_op_p (operator_code)) */
9499 error ("%qD must take exactly one argument", decl);
9501 error ("%qD must take exactly two arguments", decl);
9505 /* More Effective C++ rule 7. */
9507 && (operator_code == TRUTH_ANDIF_EXPR
9508 || operator_code == TRUTH_ORIF_EXPR
9509 || operator_code == COMPOUND_EXPR))
9510 warning (OPT_Weffc__, "user-defined %qD always evaluates both arguments",
9514 /* Effective C++ rule 23. */
9517 && !DECL_ASSIGNMENT_OPERATOR_P (decl)
9518 && (operator_code == PLUS_EXPR
9519 || operator_code == MINUS_EXPR
9520 || operator_code == TRUNC_DIV_EXPR
9521 || operator_code == MULT_EXPR
9522 || operator_code == TRUNC_MOD_EXPR)
9523 && TREE_CODE (TREE_TYPE (TREE_TYPE (decl))) == REFERENCE_TYPE)
9524 warning (OPT_Weffc__, "%qD should return by value", decl);
9527 for (; argtypes && argtypes != void_list_node;
9528 argtypes = TREE_CHAIN (argtypes))
9529 if (TREE_PURPOSE (argtypes))
9531 TREE_PURPOSE (argtypes) = NULL_TREE;
9532 if (operator_code == POSTINCREMENT_EXPR
9533 || operator_code == POSTDECREMENT_EXPR)
9536 pedwarn ("%qD cannot have default arguments", decl);
9540 error ("%qD cannot have default arguments", decl);
9548 /* Return a string giving the keyword associate with CODE. */
9551 tag_name (enum tag_types code)
9570 /* Name lookup in an elaborated-type-specifier (after the keyword
9571 indicated by TAG_CODE) has found the TYPE_DECL DECL. If the
9572 elaborated-type-specifier is invalid, issue a diagnostic and return
9573 error_mark_node; otherwise, return the *_TYPE to which it referred.
9574 If ALLOW_TEMPLATE_P is true, TYPE may be a class template. */
9577 check_elaborated_type_specifier (enum tag_types tag_code,
9579 bool allow_template_p)
9585 struct S { struct S *p; };
9587 name lookup will find the TYPE_DECL for the implicit "S::S"
9588 typedef. Adjust for that here. */
9589 if (DECL_SELF_REFERENCE_P (decl))
9590 decl = TYPE_NAME (TREE_TYPE (decl));
9592 type = TREE_TYPE (decl);
9594 /* Check TEMPLATE_TYPE_PARM first because DECL_IMPLICIT_TYPEDEF_P
9595 is false for this case as well. */
9596 if (TREE_CODE (type) == TEMPLATE_TYPE_PARM)
9598 error ("using template type parameter %qT after %qs",
9599 type, tag_name (tag_code));
9600 return error_mark_node;
9604 If the identifier resolves to a typedef-name or a template
9605 type-parameter, the elaborated-type-specifier is ill-formed.
9607 In other words, the only legitimate declaration to use in the
9608 elaborated type specifier is the implicit typedef created when
9609 the type is declared. */
9610 else if (!DECL_IMPLICIT_TYPEDEF_P (decl)
9611 && tag_code != typename_type)
9613 error ("using typedef-name %qD after %qs", decl, tag_name (tag_code));
9614 error ("%q+D has a previous declaration here", decl);
9615 return error_mark_node;
9617 else if (TREE_CODE (type) != RECORD_TYPE
9618 && TREE_CODE (type) != UNION_TYPE
9619 && tag_code != enum_type
9620 && tag_code != typename_type)
9622 error ("%qT referred to as %qs", type, tag_name (tag_code));
9623 error ("%q+T has a previous declaration here", type);
9624 return error_mark_node;
9626 else if (TREE_CODE (type) != ENUMERAL_TYPE
9627 && tag_code == enum_type)
9629 error ("%qT referred to as enum", type);
9630 error ("%q+T has a previous declaration here", type);
9631 return error_mark_node;
9633 else if (!allow_template_p
9634 && TREE_CODE (type) == RECORD_TYPE
9635 && CLASSTYPE_IS_TEMPLATE (type))
9637 /* If a class template appears as elaborated type specifier
9638 without a template header such as:
9640 template <class T> class C {};
9641 void f(class C); // No template header here
9643 then the required template argument is missing. */
9644 error ("template argument required for %<%s %T%>",
9645 tag_name (tag_code),
9646 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type)));
9647 return error_mark_node;
9653 /* Lookup NAME in elaborate type specifier in scope according to
9654 SCOPE and issue diagnostics if necessary.
9655 Return *_TYPE node upon success, NULL_TREE when the NAME is not
9656 found, and ERROR_MARK_NODE for type error. */
9659 lookup_and_check_tag (enum tag_types tag_code, tree name,
9660 tag_scope scope, bool template_header_p)
9664 if (scope == ts_global)
9666 /* First try ordinary name lookup, ignoring hidden class name
9667 injected via friend declaration. */
9668 decl = lookup_name_prefer_type (name, 2);
9669 /* If that fails, the name will be placed in the smallest
9670 non-class, non-function-prototype scope according to 3.3.1/5.
9671 We may already have a hidden name declared as friend in this
9672 scope. So lookup again but not ignoring hidden names.
9673 If we find one, that name will be made visible rather than
9674 creating a new tag. */
9676 decl = lookup_type_scope (name, ts_within_enclosing_non_class);
9679 decl = lookup_type_scope (name, scope);
9681 if (decl && DECL_CLASS_TEMPLATE_P (decl))
9682 decl = DECL_TEMPLATE_RESULT (decl);
9684 if (decl && TREE_CODE (decl) == TYPE_DECL)
9686 /* Look for invalid nested type:
9690 if (scope == ts_current && DECL_SELF_REFERENCE_P (decl))
9692 error ("%qD has the same name as the class in which it is "
9695 return error_mark_node;
9698 /* Two cases we need to consider when deciding if a class
9699 template is allowed as an elaborated type specifier:
9700 1. It is a self reference to its own class.
9701 2. It comes with a template header.
9705 template <class T> class C {
9706 class C *c1; // DECL_SELF_REFERENCE_P is true
9709 template <class U> class C; // template_header_p is true
9710 template <class T> class C<T>::D {
9711 class C *c2; // DECL_SELF_REFERENCE_P is true
9714 t = check_elaborated_type_specifier (tag_code,
9717 | DECL_SELF_REFERENCE_P (decl));
9724 /* Get the struct, enum or union (TAG_CODE says which) with tag NAME.
9725 Define the tag as a forward-reference if it is not defined.
9727 If a declaration is given, process it here, and report an error if
9728 multiple declarations are not identical.
9730 SCOPE is TS_CURRENT when this is also a definition. Only look in
9731 the current frame for the name (since C++ allows new names in any
9732 scope.) It is TS_WITHIN_ENCLOSING_NON_CLASS if this is a friend
9733 declaration. Only look beginning from the current scope outward up
9734 till the nearest non-class scope. Otherwise it is TS_GLOBAL.
9736 TEMPLATE_HEADER_P is true when this declaration is preceded by
9737 a set of template parameters. */
9740 xref_tag (enum tag_types tag_code, tree name,
9741 tag_scope scope, bool template_header_p)
9743 enum tree_code code;
9745 tree context = NULL_TREE;
9747 timevar_push (TV_NAME_LOOKUP);
9749 gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE);
9761 code = ENUMERAL_TYPE;
9767 /* In case of anonymous name, xref_tag is only called to
9768 make type node and push name. Name lookup is not required. */
9769 if (ANON_AGGRNAME_P (name))
9772 t = lookup_and_check_tag (tag_code, name,
9773 scope, template_header_p);
9775 if (t == error_mark_node)
9776 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
9778 if (scope != ts_current && t && current_class_type
9779 && template_class_depth (current_class_type)
9780 && template_header_p)
9782 /* Since SCOPE is not TS_CURRENT, we are not looking at a
9783 definition of this tag. Since, in addition, we are currently
9784 processing a (member) template declaration of a template
9785 class, we must be very careful; consider:
9792 { template <class V>
9793 friend struct S1; };
9795 Here, the S2::S1 declaration should not be confused with the
9796 outer declaration. In particular, the inner version should
9797 have a template parameter of level 2, not level 1. This
9798 would be particularly important if the member declaration
9801 template <class V = U> friend struct S1;
9803 say, when we should tsubst into `U' when instantiating
9804 S2. On the other hand, when presented with:
9814 we must find the inner binding eventually. We
9815 accomplish this by making sure that the new type we
9816 create to represent this declaration has the right
9818 context = TYPE_CONTEXT (t);
9824 /* If no such tag is yet defined, create a forward-reference node
9825 and record it as the "definition".
9826 When a real declaration of this type is found,
9827 the forward-reference will be altered into a real type. */
9828 if (code == ENUMERAL_TYPE)
9830 error ("use of enum %q#D without previous declaration", name);
9831 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
9835 t = make_aggr_type (code);
9836 TYPE_CONTEXT (t) = context;
9837 t = pushtag (name, t, scope);
9842 if (template_header_p && IS_AGGR_TYPE (t))
9844 if (!redeclare_class_template (t, current_template_parms))
9845 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
9847 else if (!processing_template_decl
9849 && CLASSTYPE_IS_TEMPLATE (t))
9851 error ("redeclaration of %qT as a non-template", t);
9852 error ("previous declaration %q+D", t);
9853 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
9856 /* Make injected friend class visible. */
9857 if (scope != ts_within_enclosing_non_class
9858 && hidden_name_p (TYPE_NAME (t)))
9860 DECL_ANTICIPATED (TYPE_NAME (t)) = 0;
9861 DECL_FRIEND_P (TYPE_NAME (t)) = 0;
9863 if (TYPE_TEMPLATE_INFO (t))
9865 DECL_ANTICIPATED (TYPE_TI_TEMPLATE (t)) = 0;
9866 DECL_FRIEND_P (TYPE_TI_TEMPLATE (t)) = 0;
9871 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, t);
9875 xref_tag_from_type (tree old, tree id, tag_scope scope)
9877 enum tag_types tag_kind;
9879 if (TREE_CODE (old) == RECORD_TYPE)
9880 tag_kind = (CLASSTYPE_DECLARED_CLASS (old) ? class_type : record_type);
9882 tag_kind = union_type;
9884 if (id == NULL_TREE)
9885 id = TYPE_IDENTIFIER (old);
9887 return xref_tag (tag_kind, id, scope, false);
9890 /* Create the binfo hierarchy for REF with (possibly NULL) base list
9891 BASE_LIST. For each element on BASE_LIST the TREE_PURPOSE is an
9892 access_* node, and the TREE_VALUE is the type of the base-class.
9893 Non-NULL TREE_TYPE indicates virtual inheritance.
9895 Returns true if the binfo heirarchy was successfully created,
9896 false if an error was detected. */
9899 xref_basetypes (tree ref, tree base_list)
9902 tree binfo, base_binfo;
9903 unsigned max_vbases = 0; /* Maximum direct & indirect virtual bases. */
9904 unsigned max_bases = 0; /* Maximum direct bases. */
9906 tree default_access;
9907 tree igo_prev; /* Track Inheritance Graph Order. */
9909 if (ref == error_mark_node)
9912 /* The base of a derived class is private by default, all others are
9914 default_access = (TREE_CODE (ref) == RECORD_TYPE
9915 && CLASSTYPE_DECLARED_CLASS (ref)
9916 ? access_private_node : access_public_node);
9918 /* First, make sure that any templates in base-classes are
9919 instantiated. This ensures that if we call ourselves recursively
9920 we do not get confused about which classes are marked and which
9925 tree basetype = TREE_VALUE (*basep);
9927 if (!(processing_template_decl && uses_template_parms (basetype))
9928 && !complete_type_or_else (basetype, NULL))
9929 /* An incomplete type. Remove it from the list. */
9930 *basep = TREE_CHAIN (*basep);
9934 if (TREE_TYPE (*basep))
9936 if (CLASS_TYPE_P (basetype))
9937 max_vbases += VEC_length (tree, CLASSTYPE_VBASECLASSES (basetype));
9938 basep = &TREE_CHAIN (*basep);
9942 TYPE_MARKED_P (ref) = 1;
9944 /* The binfo slot should be empty, unless this is an (ill-formed)
9946 gcc_assert (!TYPE_BINFO (ref) || TYPE_SIZE (ref));
9947 gcc_assert (TYPE_MAIN_VARIANT (ref) == ref);
9949 binfo = make_tree_binfo (max_bases);
9951 TYPE_BINFO (ref) = binfo;
9952 BINFO_OFFSET (binfo) = size_zero_node;
9953 BINFO_TYPE (binfo) = ref;
9957 BINFO_BASE_ACCESSES (binfo) = VEC_alloc (tree, gc, max_bases);
9958 /* An aggregate cannot have baseclasses. */
9959 CLASSTYPE_NON_AGGREGATE (ref) = 1;
9961 if (TREE_CODE (ref) == UNION_TYPE)
9963 error ("derived union %qT invalid", ref);
9970 if (TYPE_FOR_JAVA (ref))
9972 error ("Java class %qT cannot have multiple bases", ref);
9979 CLASSTYPE_VBASECLASSES (ref) = VEC_alloc (tree, gc, max_vbases);
9981 if (TYPE_FOR_JAVA (ref))
9983 error ("Java class %qT cannot have virtual bases", ref);
9988 for (igo_prev = binfo; base_list; base_list = TREE_CHAIN (base_list))
9990 tree access = TREE_PURPOSE (base_list);
9991 int via_virtual = TREE_TYPE (base_list) != NULL_TREE;
9992 tree basetype = TREE_VALUE (base_list);
9994 if (access == access_default_node)
9995 access = default_access;
9997 if (TREE_CODE (basetype) == TYPE_DECL)
9998 basetype = TREE_TYPE (basetype);
9999 if (TREE_CODE (basetype) != RECORD_TYPE
10000 && TREE_CODE (basetype) != TYPENAME_TYPE
10001 && TREE_CODE (basetype) != TEMPLATE_TYPE_PARM
10002 && TREE_CODE (basetype) != BOUND_TEMPLATE_TEMPLATE_PARM)
10004 error ("base type %qT fails to be a struct or class type",
10009 if (TYPE_FOR_JAVA (basetype) && (current_lang_depth () == 0))
10010 TYPE_FOR_JAVA (ref) = 1;
10012 base_binfo = NULL_TREE;
10013 if (CLASS_TYPE_P (basetype) && !dependent_type_p (basetype))
10015 base_binfo = TYPE_BINFO (basetype);
10016 /* The original basetype could have been a typedef'd type. */
10017 basetype = BINFO_TYPE (base_binfo);
10019 /* Inherit flags from the base. */
10020 TYPE_HAS_NEW_OPERATOR (ref)
10021 |= TYPE_HAS_NEW_OPERATOR (basetype);
10022 TYPE_HAS_ARRAY_NEW_OPERATOR (ref)
10023 |= TYPE_HAS_ARRAY_NEW_OPERATOR (basetype);
10024 TYPE_GETS_DELETE (ref) |= TYPE_GETS_DELETE (basetype);
10025 TYPE_HAS_CONVERSION (ref) |= TYPE_HAS_CONVERSION (basetype);
10026 CLASSTYPE_DIAMOND_SHAPED_P (ref)
10027 |= CLASSTYPE_DIAMOND_SHAPED_P (basetype);
10028 CLASSTYPE_REPEATED_BASE_P (ref)
10029 |= CLASSTYPE_REPEATED_BASE_P (basetype);
10032 /* We must do this test after we've seen through a typedef
10034 if (TYPE_MARKED_P (basetype))
10036 if (basetype == ref)
10037 error ("recursive type %qT undefined", basetype);
10039 error ("duplicate base type %qT invalid", basetype);
10042 TYPE_MARKED_P (basetype) = 1;
10044 base_binfo = copy_binfo (base_binfo, basetype, ref,
10045 &igo_prev, via_virtual);
10046 if (!BINFO_INHERITANCE_CHAIN (base_binfo))
10047 BINFO_INHERITANCE_CHAIN (base_binfo) = binfo;
10049 BINFO_BASE_APPEND (binfo, base_binfo);
10050 BINFO_BASE_ACCESS_APPEND (binfo, access);
10053 if (VEC_space (tree, CLASSTYPE_VBASECLASSES (ref), 1))
10054 /* If we have space in the vbase vector, we must have shared at
10055 least one of them, and are therefore diamond shaped. */
10056 CLASSTYPE_DIAMOND_SHAPED_P (ref) = 1;
10058 /* Unmark all the types. */
10059 for (i = 0; BINFO_BASE_ITERATE (binfo, i, base_binfo); i++)
10060 TYPE_MARKED_P (BINFO_TYPE (base_binfo)) = 0;
10061 TYPE_MARKED_P (ref) = 0;
10063 /* Now see if we have a repeated base type. */
10064 if (!CLASSTYPE_REPEATED_BASE_P (ref))
10066 for (base_binfo = binfo; base_binfo;
10067 base_binfo = TREE_CHAIN (base_binfo))
10069 if (TYPE_MARKED_P (BINFO_TYPE (base_binfo)))
10071 CLASSTYPE_REPEATED_BASE_P (ref) = 1;
10074 TYPE_MARKED_P (BINFO_TYPE (base_binfo)) = 1;
10076 for (base_binfo = binfo; base_binfo;
10077 base_binfo = TREE_CHAIN (base_binfo))
10078 if (TYPE_MARKED_P (BINFO_TYPE (base_binfo)))
10079 TYPE_MARKED_P (BINFO_TYPE (base_binfo)) = 0;
10088 /* Begin compiling the definition of an enumeration type.
10090 Returns the type object, as yet incomplete.
10091 Also records info about it so that build_enumerator
10092 may be used to declare the individual values as they are read. */
10095 start_enum (tree name)
10099 gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE);
10101 /* If this is the real definition for a previous forward reference,
10102 fill in the contents in the same object that used to be the
10103 forward reference. */
10105 enumtype = lookup_and_check_tag (enum_type, name,
10106 /*tag_scope=*/ts_current,
10107 /*template_header_p=*/false);
10109 if (enumtype != NULL_TREE && TREE_CODE (enumtype) == ENUMERAL_TYPE)
10111 error ("multiple definition of %q#T", enumtype);
10112 error ("%Jprevious definition here", TYPE_MAIN_DECL (enumtype));
10113 /* Clear out TYPE_VALUES, and start again. */
10114 TYPE_VALUES (enumtype) = NULL_TREE;
10118 /* In case of error, make a dummy enum to allow parsing to
10120 if (enumtype == error_mark_node)
10121 name = make_anon_name ();
10123 enumtype = make_node (ENUMERAL_TYPE);
10124 enumtype = pushtag (name, enumtype, /*tag_scope=*/ts_current);
10130 /* After processing and defining all the values of an enumeration type,
10131 install their decls in the enumeration type and finish it off.
10132 ENUMTYPE is the type object and VALUES a list of name-value pairs. */
10135 finish_enum (tree enumtype)
10144 bool use_short_enum;
10148 integer_type_kind itk;
10149 tree underlying_type = NULL_TREE;
10151 /* We built up the VALUES in reverse order. */
10152 TYPE_VALUES (enumtype) = nreverse (TYPE_VALUES (enumtype));
10154 /* For an enum defined in a template, just set the type of the values;
10155 all further processing is postponed until the template is
10156 instantiated. We need to set the type so that tsubst of a CONST_DECL
10158 if (processing_template_decl)
10160 for (values = TYPE_VALUES (enumtype);
10162 values = TREE_CHAIN (values))
10163 TREE_TYPE (TREE_VALUE (values)) = enumtype;
10164 if (at_function_scope_p ())
10165 add_stmt (build_min (TAG_DEFN, enumtype));
10169 /* Determine the minimum and maximum values of the enumerators. */
10170 if (TYPE_VALUES (enumtype))
10172 minnode = maxnode = NULL_TREE;
10174 for (values = TYPE_VALUES (enumtype);
10176 values = TREE_CHAIN (values))
10178 decl = TREE_VALUE (values);
10180 /* [dcl.enum]: Following the closing brace of an enum-specifier,
10181 each enumerator has the type of its enumeration. Prior to the
10182 closing brace, the type of each enumerator is the type of its
10183 initializing value. */
10184 TREE_TYPE (decl) = enumtype;
10186 /* Update the minimum and maximum values, if appropriate. */
10187 value = DECL_INITIAL (decl);
10188 if (value == error_mark_node)
10189 value = integer_zero_node;
10190 /* Figure out what the minimum and maximum values of the
10191 enumerators are. */
10193 minnode = maxnode = value;
10194 else if (tree_int_cst_lt (maxnode, value))
10196 else if (tree_int_cst_lt (value, minnode))
10203 If the enumerator-list is empty, the underlying type is as if
10204 the enumeration had a single enumerator with value 0. */
10205 minnode = maxnode = integer_zero_node;
10207 /* Compute the number of bits require to represent all values of the
10208 enumeration. We must do this before the type of MINNODE and
10209 MAXNODE are transformed, since min_precision relies on the
10210 TREE_TYPE of the value it is passed. */
10211 unsignedp = tree_int_cst_sgn (minnode) >= 0;
10212 lowprec = min_precision (minnode, unsignedp);
10213 highprec = min_precision (maxnode, unsignedp);
10214 precision = MAX (lowprec, highprec);
10216 /* Determine the underlying type of the enumeration.
10220 The underlying type of an enumeration is an integral type that
10221 can represent all the enumerator values defined in the
10222 enumeration. It is implementation-defined which integral type is
10223 used as the underlying type for an enumeration except that the
10224 underlying type shall not be larger than int unless the value of
10225 an enumerator cannot fit in an int or unsigned int.
10227 We use "int" or an "unsigned int" as the underlying type, even if
10228 a smaller integral type would work, unless the user has
10229 explicitly requested that we use the smallest possible type. The
10230 user can request that for all enumerations with a command line
10231 flag, or for just one enumeration with an attribute. */
10233 use_short_enum = flag_short_enums
10234 || lookup_attribute ("packed", TYPE_ATTRIBUTES (enumtype));
10236 for (itk = (use_short_enum ? itk_char : itk_int);
10240 underlying_type = integer_types[itk];
10241 if (TYPE_PRECISION (underlying_type) >= precision
10242 && TYPE_UNSIGNED (underlying_type) == unsignedp)
10245 if (itk == itk_none)
10249 IF no integral type can represent all the enumerator values, the
10250 enumeration is ill-formed. */
10251 error ("no integral type can represent all of the enumerator values "
10252 "for %qT", enumtype);
10253 precision = TYPE_PRECISION (long_long_integer_type_node);
10254 underlying_type = integer_types[itk_unsigned_long_long];
10257 /* Compute the minium and maximum values for the type.
10261 For an enumeration where emin is the smallest enumerator and emax
10262 is the largest, the values of the enumeration are the values of the
10263 underlying type in the range bmin to bmax, where bmin and bmax are,
10264 respectively, the smallest and largest values of the smallest bit-
10265 field that can store emin and emax. */
10267 /* The middle-end currently assumes that types with TYPE_PRECISION
10268 narrower than their underlying type are suitably zero or sign
10269 extended to fill their mode. g++ doesn't make these guarantees.
10270 Until the middle-end can represent such paradoxical types, we
10271 set the TYPE_PRECISION to the width of the underlying type. */
10272 TYPE_PRECISION (enumtype) = TYPE_PRECISION (underlying_type);
10274 set_min_and_max_values_for_integral_type (enumtype, precision, unsignedp);
10278 The value of sizeof() applied to an enumeration type, an object
10279 of an enumeration type, or an enumerator, is the value of sizeof()
10280 applied to the underlying type. */
10281 TYPE_SIZE (enumtype) = TYPE_SIZE (underlying_type);
10282 TYPE_SIZE_UNIT (enumtype) = TYPE_SIZE_UNIT (underlying_type);
10283 TYPE_MODE (enumtype) = TYPE_MODE (underlying_type);
10284 TYPE_ALIGN (enumtype) = TYPE_ALIGN (underlying_type);
10285 TYPE_USER_ALIGN (enumtype) = TYPE_USER_ALIGN (underlying_type);
10286 TYPE_UNSIGNED (enumtype) = TYPE_UNSIGNED (underlying_type);
10288 /* Convert each of the enumerators to the type of the underlying
10289 type of the enumeration. */
10290 for (values = TYPE_VALUES (enumtype); values; values = TREE_CHAIN (values))
10292 location_t saved_location;
10294 decl = TREE_VALUE (values);
10295 saved_location = input_location;
10296 input_location = DECL_SOURCE_LOCATION (decl);
10297 value = perform_implicit_conversion (underlying_type,
10298 DECL_INITIAL (decl));
10299 input_location = saved_location;
10301 /* Do not clobber shared ints. */
10302 value = copy_node (value);
10304 TREE_TYPE (value) = enumtype;
10305 DECL_INITIAL (decl) = value;
10306 TREE_VALUE (values) = value;
10309 /* Fix up all variant types of this enum type. */
10310 for (t = TYPE_MAIN_VARIANT (enumtype); t; t = TYPE_NEXT_VARIANT (t))
10312 TYPE_VALUES (t) = TYPE_VALUES (enumtype);
10313 TYPE_MIN_VALUE (t) = TYPE_MIN_VALUE (enumtype);
10314 TYPE_MAX_VALUE (t) = TYPE_MAX_VALUE (enumtype);
10315 TYPE_SIZE (t) = TYPE_SIZE (enumtype);
10316 TYPE_SIZE_UNIT (t) = TYPE_SIZE_UNIT (enumtype);
10317 TYPE_MODE (t) = TYPE_MODE (enumtype);
10318 TYPE_PRECISION (t) = TYPE_PRECISION (enumtype);
10319 TYPE_ALIGN (t) = TYPE_ALIGN (enumtype);
10320 TYPE_USER_ALIGN (t) = TYPE_USER_ALIGN (enumtype);
10321 TYPE_UNSIGNED (t) = TYPE_UNSIGNED (enumtype);
10324 /* Finish debugging output for this type. */
10325 rest_of_type_compilation (enumtype, namespace_bindings_p ());
10328 /* Build and install a CONST_DECL for an enumeration constant of the
10329 enumeration type ENUMTYPE whose NAME and VALUE (if any) are provided.
10330 Assignment of sequential values by default is handled here. */
10333 build_enumerator (tree name, tree value, tree enumtype)
10339 /* If the VALUE was erroneous, pretend it wasn't there; that will
10340 result in the enum being assigned the next value in sequence. */
10341 if (value == error_mark_node)
10344 /* Remove no-op casts from the value. */
10346 STRIP_TYPE_NOPS (value);
10348 if (! processing_template_decl)
10350 /* Validate and default VALUE. */
10351 if (value != NULL_TREE)
10353 value = integral_constant_value (value);
10355 if (TREE_CODE (value) == INTEGER_CST)
10357 value = perform_integral_promotions (value);
10358 constant_expression_warning (value);
10362 error ("enumerator value for %qD not integer constant", name);
10367 /* Default based on previous value. */
10368 if (value == NULL_TREE)
10370 if (TYPE_VALUES (enumtype))
10373 unsigned HOST_WIDE_INT lo;
10377 /* The next value is the previous value plus one. We can
10378 safely assume that the previous value is an INTEGER_CST.
10379 add_double doesn't know the type of the target expression,
10380 so we must check with int_fits_type_p as well. */
10381 prev_value = DECL_INITIAL (TREE_VALUE (TYPE_VALUES (enumtype)));
10382 overflowed = add_double (TREE_INT_CST_LOW (prev_value),
10383 TREE_INT_CST_HIGH (prev_value),
10385 value = build_int_cst_wide (TREE_TYPE (prev_value), lo, hi);
10386 overflowed |= !int_fits_type_p (value, TREE_TYPE (prev_value));
10390 error ("overflow in enumeration values at %qD", name);
10391 value = error_mark_node;
10395 value = integer_zero_node;
10398 /* Remove no-op casts from the value. */
10399 STRIP_TYPE_NOPS (value);
10402 /* C++ associates enums with global, function, or class declarations. */
10403 context = current_scope ();
10405 /* Build the actual enumeration constant. Note that the enumeration
10406 constants have the type of their initializers until the
10407 enumeration is complete:
10411 Following the closing brace of an enum-specifier, each enumer-
10412 ator has the type of its enumeration. Prior to the closing
10413 brace, the type of each enumerator is the type of its
10414 initializing value.
10416 In finish_enum we will reset the type. Of course, if we're
10417 processing a template, there may be no value. */
10418 type = value ? TREE_TYPE (value) : NULL_TREE;
10420 if (context && context == current_class_type)
10421 /* This enum declaration is local to the class. We need the full
10422 lang_decl so that we can record DECL_CLASS_CONTEXT, for example. */
10423 decl = build_lang_decl (CONST_DECL, name, type);
10425 /* It's a global enum, or it's local to a function. (Note local to
10426 a function could mean local to a class method. */
10427 decl = build_decl (CONST_DECL, name, type);
10429 DECL_CONTEXT (decl) = FROB_CONTEXT (context);
10430 TREE_CONSTANT (decl) = 1;
10431 TREE_INVARIANT (decl) = 1;
10432 TREE_READONLY (decl) = 1;
10433 DECL_INITIAL (decl) = value;
10435 if (context && context == current_class_type)
10436 /* In something like `struct S { enum E { i = 7 }; };' we put `i'
10437 on the TYPE_FIELDS list for `S'. (That's so that you can say
10438 things like `S::i' later.) */
10439 finish_member_declaration (decl);
10443 /* Add this enumeration constant to the list for this type. */
10444 TYPE_VALUES (enumtype) = tree_cons (name, decl, TYPE_VALUES (enumtype));
10448 /* We're defining DECL. Make sure that it's type is OK. */
10451 check_function_type (tree decl, tree current_function_parms)
10453 tree fntype = TREE_TYPE (decl);
10454 tree return_type = complete_type (TREE_TYPE (fntype));
10456 /* In a function definition, arg types must be complete. */
10457 require_complete_types_for_parms (current_function_parms);
10459 if (dependent_type_p (return_type))
10461 if (!COMPLETE_OR_VOID_TYPE_P (return_type))
10463 tree args = TYPE_ARG_TYPES (fntype);
10465 error ("return type %q#T is incomplete", return_type);
10467 /* Make it return void instead. */
10468 if (TREE_CODE (fntype) == METHOD_TYPE)
10469 fntype = build_method_type_directly (TREE_TYPE (TREE_VALUE (args)),
10471 TREE_CHAIN (args));
10473 fntype = build_function_type (void_type_node, args);
10475 = build_exception_variant (fntype,
10476 TYPE_RAISES_EXCEPTIONS (TREE_TYPE (decl)));
10479 abstract_virtuals_error (decl, TREE_TYPE (fntype));
10482 /* Create the FUNCTION_DECL for a function definition.
10483 DECLSPECS and DECLARATOR are the parts of the declaration;
10484 they describe the function's name and the type it returns,
10485 but twisted together in a fashion that parallels the syntax of C.
10487 FLAGS is a bitwise or of SF_PRE_PARSED (indicating that the
10488 DECLARATOR is really the DECL for the function we are about to
10489 process and that DECLSPECS should be ignored), SF_INCLASS_INLINE
10490 indicating that the function is an inline defined in-class.
10492 This function creates a binding context for the function body
10493 as well as setting up the FUNCTION_DECL in current_function_decl.
10495 For C++, we must first check whether that datum makes any sense.
10496 For example, "class A local_a(1,2);" means that variable local_a
10497 is an aggregate of type A, which should have a constructor
10498 applied to it with the argument list [1, 2]. */
10501 start_preparsed_function (tree decl1, tree attrs, int flags)
10503 tree ctype = NULL_TREE;
10506 int doing_friend = 0;
10507 struct cp_binding_level *bl;
10508 tree current_function_parms;
10509 struct c_fileinfo *finfo
10510 = get_fileinfo (LOCATION_FILE (DECL_SOURCE_LOCATION (decl1)));
10511 bool honor_interface;
10513 /* Sanity check. */
10514 gcc_assert (TREE_CODE (TREE_VALUE (void_list_node)) == VOID_TYPE);
10515 gcc_assert (TREE_CHAIN (void_list_node) == NULL_TREE);
10517 fntype = TREE_TYPE (decl1);
10518 if (TREE_CODE (fntype) == METHOD_TYPE)
10519 ctype = TYPE_METHOD_BASETYPE (fntype);
10521 /* ISO C++ 11.4/5. A friend function defined in a class is in
10522 the (lexical) scope of the class in which it is defined. */
10523 if (!ctype && DECL_FRIEND_P (decl1))
10525 ctype = DECL_FRIEND_CONTEXT (decl1);
10527 /* CTYPE could be null here if we're dealing with a template;
10528 for example, `inline friend float foo()' inside a template
10529 will have no CTYPE set. */
10530 if (ctype && TREE_CODE (ctype) != RECORD_TYPE)
10536 if (DECL_DECLARED_INLINE_P (decl1)
10537 && lookup_attribute ("noinline", attrs))
10538 warning (0, "inline function %q+D given attribute noinline", decl1);
10540 if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (decl1))
10541 /* This is a constructor, we must ensure that any default args
10542 introduced by this definition are propagated to the clones
10543 now. The clones are used directly in overload resolution. */
10544 adjust_clone_args (decl1);
10546 /* Sometimes we don't notice that a function is a static member, and
10547 build a METHOD_TYPE for it. Fix that up now. */
10548 if (ctype != NULL_TREE && DECL_STATIC_FUNCTION_P (decl1)
10549 && TREE_CODE (TREE_TYPE (decl1)) == METHOD_TYPE)
10551 revert_static_member_fn (decl1);
10555 /* Set up current_class_type, and enter the scope of the class, if
10558 push_nested_class (ctype);
10559 else if (DECL_STATIC_FUNCTION_P (decl1))
10560 push_nested_class (DECL_CONTEXT (decl1));
10562 /* Now that we have entered the scope of the class, we must restore
10563 the bindings for any template parameters surrounding DECL1, if it
10564 is an inline member template. (Order is important; consider the
10565 case where a template parameter has the same name as a field of
10566 the class.) It is not until after this point that
10567 PROCESSING_TEMPLATE_DECL is guaranteed to be set up correctly. */
10568 if (flags & SF_INCLASS_INLINE)
10569 maybe_begin_member_template_processing (decl1);
10571 /* Effective C++ rule 15. */
10573 && DECL_OVERLOADED_OPERATOR_P (decl1) == NOP_EXPR
10574 && TREE_CODE (TREE_TYPE (fntype)) == VOID_TYPE)
10575 warning (OPT_Weffc__, "%<operator=%> should return a reference to %<*this%>");
10577 /* Make the init_value nonzero so pushdecl knows this is not tentative.
10578 error_mark_node is replaced below (in poplevel) with the BLOCK. */
10579 if (!DECL_INITIAL (decl1))
10580 DECL_INITIAL (decl1) = error_mark_node;
10582 /* This function exists in static storage.
10583 (This does not mean `static' in the C sense!) */
10584 TREE_STATIC (decl1) = 1;
10586 /* We must call push_template_decl after current_class_type is set
10587 up. (If we are processing inline definitions after exiting a
10588 class scope, current_class_type will be NULL_TREE until set above
10589 by push_nested_class.) */
10590 if (processing_template_decl)
10592 /* FIXME: Handle error_mark_node more gracefully. */
10593 tree newdecl1 = push_template_decl (decl1);
10594 if (newdecl1 != error_mark_node)
10598 /* We are now in the scope of the function being defined. */
10599 current_function_decl = decl1;
10601 /* Save the parm names or decls from this function's declarator
10602 where store_parm_decls will find them. */
10603 current_function_parms = DECL_ARGUMENTS (decl1);
10605 /* Make sure the parameter and return types are reasonable. When
10606 you declare a function, these types can be incomplete, but they
10607 must be complete when you define the function. */
10608 check_function_type (decl1, current_function_parms);
10610 /* Build the return declaration for the function. */
10611 restype = TREE_TYPE (fntype);
10612 /* Promote the value to int before returning it. */
10613 if (c_promoting_integer_type_p (restype))
10614 restype = type_promotes_to (restype);
10615 if (DECL_RESULT (decl1) == NULL_TREE)
10619 resdecl = build_decl (RESULT_DECL, 0, TYPE_MAIN_VARIANT (restype));
10620 DECL_ARTIFICIAL (resdecl) = 1;
10621 DECL_IGNORED_P (resdecl) = 1;
10622 DECL_RESULT (decl1) = resdecl;
10624 cp_apply_type_quals_to_decl (cp_type_quals (restype), resdecl);
10627 /* Initialize RTL machinery. We cannot do this until
10628 CURRENT_FUNCTION_DECL and DECL_RESULT are set up. We do this
10629 even when processing a template; this is how we get
10630 CFUN set up, and our per-function variables initialized.
10631 FIXME factor out the non-RTL stuff. */
10632 bl = current_binding_level;
10633 allocate_struct_function (decl1);
10634 current_binding_level = bl;
10636 /* Even though we're inside a function body, we still don't want to
10637 call expand_expr to calculate the size of a variable-sized array.
10638 We haven't necessarily assigned RTL to all variables yet, so it's
10639 not safe to try to expand expressions involving them. */
10640 cfun->x_dont_save_pending_sizes_p = 1;
10642 /* Start the statement-tree, start the tree now. */
10643 DECL_SAVED_TREE (decl1) = push_stmt_list ();
10645 /* Let the user know we're compiling this function. */
10646 announce_function (decl1);
10648 /* Record the decl so that the function name is defined.
10649 If we already have a decl for this name, and it is a FUNCTION_DECL,
10650 use the old decl. */
10651 if (!processing_template_decl && !(flags & SF_PRE_PARSED))
10653 /* A specialization is not used to guide overload resolution. */
10654 if (!DECL_FUNCTION_MEMBER_P (decl1)
10655 && !(DECL_USE_TEMPLATE (decl1) &&
10656 PRIMARY_TEMPLATE_P (DECL_TI_TEMPLATE (decl1))))
10658 tree olddecl = pushdecl (decl1);
10660 if (olddecl == error_mark_node)
10661 /* If something went wrong when registering the declaration,
10662 use DECL1; we have to have a FUNCTION_DECL to use when
10663 parsing the body of the function. */
10666 /* Otherwise, OLDDECL is either a previous declaration of
10667 the same function or DECL1 itself. */
10672 /* We need to set the DECL_CONTEXT. */
10673 if (!DECL_CONTEXT (decl1) && DECL_TEMPLATE_INFO (decl1))
10674 DECL_CONTEXT (decl1) = DECL_CONTEXT (DECL_TI_TEMPLATE (decl1));
10676 fntype = TREE_TYPE (decl1);
10678 /* If #pragma weak applies, mark the decl appropriately now.
10679 The pragma only applies to global functions. Because
10680 determining whether or not the #pragma applies involves
10681 computing the mangled name for the declaration, we cannot
10682 apply the pragma until after we have merged this declaration
10683 with any previous declarations; if the original declaration
10684 has a linkage specification, that specification applies to
10685 the definition as well, and may affect the mangled name. */
10686 if (!DECL_CONTEXT (decl1))
10687 maybe_apply_pragma_weak (decl1);
10690 /* Reset these in case the call to pushdecl changed them. */
10691 current_function_decl = decl1;
10692 cfun->decl = decl1;
10694 /* If we are (erroneously) defining a function that we have already
10695 defined before, wipe out what we knew before. */
10696 if (!DECL_PENDING_INLINE_P (decl1))
10697 DECL_SAVED_FUNCTION_DATA (decl1) = NULL;
10699 if (ctype && !doing_friend && !DECL_STATIC_FUNCTION_P (decl1))
10701 /* We know that this was set up by `grokclassfn'. We do not
10702 wait until `store_parm_decls', since evil parse errors may
10703 never get us to that point. Here we keep the consistency
10704 between `current_class_type' and `current_class_ptr'. */
10705 tree t = DECL_ARGUMENTS (decl1);
10707 gcc_assert (t != NULL_TREE && TREE_CODE (t) == PARM_DECL);
10708 gcc_assert (TREE_CODE (TREE_TYPE (t)) == POINTER_TYPE);
10710 cp_function_chain->x_current_class_ref
10711 = build_indirect_ref (t, NULL);
10712 cp_function_chain->x_current_class_ptr = t;
10714 /* Constructors and destructors need to know whether they're "in
10715 charge" of initializing virtual base classes. */
10716 t = TREE_CHAIN (t);
10717 if (DECL_HAS_IN_CHARGE_PARM_P (decl1))
10719 current_in_charge_parm = t;
10720 t = TREE_CHAIN (t);
10722 if (DECL_HAS_VTT_PARM_P (decl1))
10724 gcc_assert (DECL_NAME (t) == vtt_parm_identifier);
10725 current_vtt_parm = t;
10729 honor_interface = (!DECL_TEMPLATE_INSTANTIATION (decl1)
10730 /* Implicitly-defined methods (like the
10731 destructor for a class in which no destructor
10732 is explicitly declared) must not be defined
10733 until their definition is needed. So, we
10734 ignore interface specifications for
10735 compiler-generated functions. */
10736 && !DECL_ARTIFICIAL (decl1));
10738 if (DECL_INTERFACE_KNOWN (decl1))
10740 tree ctx = decl_function_context (decl1);
10742 if (DECL_NOT_REALLY_EXTERN (decl1))
10743 DECL_EXTERNAL (decl1) = 0;
10745 if (ctx != NULL_TREE && DECL_DECLARED_INLINE_P (ctx)
10746 && TREE_PUBLIC (ctx))
10747 /* This is a function in a local class in an extern inline
10749 comdat_linkage (decl1);
10751 /* If this function belongs to an interface, it is public.
10752 If it belongs to someone else's interface, it is also external.
10753 This only affects inlines and template instantiations. */
10754 else if (!finfo->interface_unknown && honor_interface)
10756 if (DECL_DECLARED_INLINE_P (decl1)
10757 || DECL_TEMPLATE_INSTANTIATION (decl1)
10758 || processing_template_decl)
10760 DECL_EXTERNAL (decl1)
10761 = (finfo->interface_only
10762 || (DECL_DECLARED_INLINE_P (decl1)
10763 && ! flag_implement_inlines
10764 && !DECL_VINDEX (decl1)));
10766 /* For WIN32 we also want to put these in linkonce sections. */
10767 maybe_make_one_only (decl1);
10770 DECL_EXTERNAL (decl1) = 0;
10771 DECL_INTERFACE_KNOWN (decl1) = 1;
10772 /* If this function is in an interface implemented in this file,
10773 make sure that the backend knows to emit this function
10775 if (!DECL_EXTERNAL (decl1))
10776 mark_needed (decl1);
10778 else if (finfo->interface_unknown && finfo->interface_only
10779 && honor_interface)
10781 /* If MULTIPLE_SYMBOL_SPACES is defined and we saw a #pragma
10782 interface, we will have both finfo->interface_unknown and
10783 finfo->interface_only set. In that case, we don't want to
10784 use the normal heuristics because someone will supply a
10785 #pragma implementation elsewhere, and deducing it here would
10786 produce a conflict. */
10787 comdat_linkage (decl1);
10788 DECL_EXTERNAL (decl1) = 0;
10789 DECL_INTERFACE_KNOWN (decl1) = 1;
10790 DECL_DEFER_OUTPUT (decl1) = 1;
10794 /* This is a definition, not a reference.
10795 So clear DECL_EXTERNAL. */
10796 DECL_EXTERNAL (decl1) = 0;
10798 if ((DECL_DECLARED_INLINE_P (decl1)
10799 || DECL_TEMPLATE_INSTANTIATION (decl1))
10800 && ! DECL_INTERFACE_KNOWN (decl1)
10801 /* Don't try to defer nested functions for now. */
10802 && ! decl_function_context (decl1))
10803 DECL_DEFER_OUTPUT (decl1) = 1;
10805 DECL_INTERFACE_KNOWN (decl1) = 1;
10808 /* Determine the ELF visibility attribute for the function. We must not
10809 do this before calling "pushdecl", as we must allow "duplicate_decls"
10810 to merge any attributes appropriately. We also need to wait until
10812 if (!DECL_CLONED_FUNCTION_P (decl1))
10813 determine_visibility (decl1);
10815 begin_scope (sk_function_parms, decl1);
10819 if (DECL_DESTRUCTOR_P (decl1)
10820 || (DECL_CONSTRUCTOR_P (decl1)
10821 && targetm.cxx.cdtor_returns_this ()))
10823 cdtor_label = build_decl (LABEL_DECL, NULL_TREE, NULL_TREE);
10824 DECL_CONTEXT (cdtor_label) = current_function_decl;
10827 start_fname_decls ();
10829 store_parm_decls (current_function_parms);
10833 /* Like start_preparsed_function, except that instead of a
10834 FUNCTION_DECL, this function takes DECLSPECS and DECLARATOR.
10836 Returns 1 on success. If the DECLARATOR is not suitable for a function
10837 (it defines a datum instead), we return 0, which tells
10838 yyparse to report a parse error. */
10841 start_function (cp_decl_specifier_seq *declspecs,
10842 const cp_declarator *declarator,
10847 decl1 = grokdeclarator (declarator, declspecs, FUNCDEF, 1, &attrs);
10848 /* If the declarator is not suitable for a function definition,
10849 cause a syntax error. */
10850 if (decl1 == NULL_TREE || TREE_CODE (decl1) != FUNCTION_DECL)
10853 if (DECL_MAIN_P (decl1))
10854 /* main must return int. grokfndecl should have corrected it
10855 (and issued a diagnostic) if the user got it wrong. */
10856 gcc_assert (same_type_p (TREE_TYPE (TREE_TYPE (decl1)),
10857 integer_type_node));
10859 start_preparsed_function (decl1, attrs, /*flags=*/SF_DEFAULT);
10864 /* Returns true iff an EH_SPEC_BLOCK should be created in the body of
10868 use_eh_spec_block (tree fn)
10870 return (flag_exceptions && flag_enforce_eh_specs
10871 && !processing_template_decl
10872 && TYPE_RAISES_EXCEPTIONS (TREE_TYPE (fn))
10873 /* We insert the EH_SPEC_BLOCK only in the original
10874 function; then, it is copied automatically to the
10876 && !DECL_CLONED_FUNCTION_P (fn)
10877 /* Implicitly-generated constructors and destructors have
10878 exception specifications. However, those specifications
10879 are the union of the possible exceptions specified by the
10880 constructors/destructors for bases and members, so no
10881 unallowed exception will ever reach this function. By
10882 not creating the EH_SPEC_BLOCK we save a little memory,
10883 and we avoid spurious warnings about unreachable
10885 && !DECL_ARTIFICIAL (fn));
10888 /* Store the parameter declarations into the current function declaration.
10889 This is called after parsing the parameter declarations, before
10890 digesting the body of the function.
10892 Also install to binding contour return value identifier, if any. */
10895 store_parm_decls (tree current_function_parms)
10897 tree fndecl = current_function_decl;
10900 /* This is a chain of any other decls that came in among the parm
10901 declarations. If a parm is declared with enum {foo, bar} x;
10902 then CONST_DECLs for foo and bar are put here. */
10903 tree nonparms = NULL_TREE;
10905 if (current_function_parms)
10907 /* This case is when the function was defined with an ANSI prototype.
10908 The parms already have decls, so we need not do anything here
10909 except record them as in effect
10910 and complain if any redundant old-style parm decls were written. */
10912 tree specparms = current_function_parms;
10915 /* Must clear this because it might contain TYPE_DECLs declared
10917 current_binding_level->names = NULL;
10919 /* If we're doing semantic analysis, then we'll call pushdecl
10920 for each of these. We must do them in reverse order so that
10921 they end in the correct forward order. */
10922 specparms = nreverse (specparms);
10924 for (parm = specparms; parm; parm = next)
10926 next = TREE_CHAIN (parm);
10927 if (TREE_CODE (parm) == PARM_DECL)
10929 if (DECL_NAME (parm) == NULL_TREE
10930 || TREE_CODE (parm) != VOID_TYPE)
10933 error ("parameter %qD declared void", parm);
10937 /* If we find an enum constant or a type tag,
10938 put it aside for the moment. */
10939 TREE_CHAIN (parm) = NULL_TREE;
10940 nonparms = chainon (nonparms, parm);
10944 /* Get the decls in their original chain order and record in the
10945 function. This is all and only the PARM_DECLs that were
10946 pushed into scope by the loop above. */
10947 DECL_ARGUMENTS (fndecl) = getdecls ();
10950 DECL_ARGUMENTS (fndecl) = NULL_TREE;
10952 /* Now store the final chain of decls for the arguments
10953 as the decl-chain of the current lexical scope.
10954 Put the enumerators in as well, at the front so that
10955 DECL_ARGUMENTS is not modified. */
10956 current_binding_level->names = chainon (nonparms, DECL_ARGUMENTS (fndecl));
10958 if (use_eh_spec_block (current_function_decl))
10959 current_eh_spec_block = begin_eh_spec_block ();
10963 /* We have finished doing semantic analysis on DECL, but have not yet
10964 generated RTL for its body. Save away our current state, so that
10965 when we want to generate RTL later we know what to do. */
10968 save_function_data (tree decl)
10970 struct language_function *f;
10972 /* Save the language-specific per-function data so that we can
10973 get it back when we really expand this function. */
10974 gcc_assert (!DECL_PENDING_INLINE_P (decl));
10977 f = GGC_NEW (struct language_function);
10978 memcpy (f, cp_function_chain, sizeof (struct language_function));
10979 DECL_SAVED_FUNCTION_DATA (decl) = f;
10981 /* Clear out the bits we don't need. */
10982 f->base.x_stmt_tree.x_cur_stmt_list = NULL_TREE;
10983 f->bindings = NULL;
10984 f->x_local_names = NULL;
10988 /* Set the return value of the constructor (if present). */
10991 finish_constructor_body (void)
10996 if (targetm.cxx.cdtor_returns_this ())
10998 /* Any return from a constructor will end up here. */
10999 add_stmt (build_stmt (LABEL_EXPR, cdtor_label));
11001 val = DECL_ARGUMENTS (current_function_decl);
11002 val = build2 (MODIFY_EXPR, TREE_TYPE (val),
11003 DECL_RESULT (current_function_decl), val);
11004 /* Return the address of the object. */
11005 exprstmt = build_stmt (RETURN_EXPR, val);
11006 add_stmt (exprstmt);
11010 /* Do all the processing for the beginning of a destructor; set up the
11011 vtable pointers and cleanups for bases and members. */
11014 begin_destructor_body (void)
11016 tree compound_stmt;
11018 /* If the CURRENT_CLASS_TYPE is incomplete, we will have already
11019 issued an error message. We still want to try to process the
11020 body of the function, but initialize_vtbl_ptrs will crash if
11021 TYPE_BINFO is NULL. */
11022 if (COMPLETE_TYPE_P (current_class_type))
11024 compound_stmt = begin_compound_stmt (0);
11025 /* Make all virtual function table pointers in non-virtual base
11026 classes point to CURRENT_CLASS_TYPE's virtual function
11028 initialize_vtbl_ptrs (current_class_ptr);
11029 finish_compound_stmt (compound_stmt);
11031 /* And insert cleanups for our bases and members so that they
11032 will be properly destroyed if we throw. */
11033 push_base_cleanups ();
11037 /* At the end of every destructor we generate code to delete the object if
11038 necessary. Do that now. */
11041 finish_destructor_body (void)
11045 /* Any return from a destructor will end up here; that way all base
11046 and member cleanups will be run when the function returns. */
11047 add_stmt (build_stmt (LABEL_EXPR, cdtor_label));
11049 /* In a virtual destructor, we must call delete. */
11050 if (DECL_VIRTUAL_P (current_function_decl))
11053 tree virtual_size = cxx_sizeof (current_class_type);
11057 At the point of definition of a virtual destructor (including
11058 an implicit definition), non-placement operator delete shall
11059 be looked up in the scope of the destructor's class and if
11060 found shall be accessible and unambiguous. */
11061 exprstmt = build_op_delete_call(DELETE_EXPR, current_class_ptr,
11063 /*global_p=*/false,
11064 /*placement=*/NULL_TREE,
11065 /*alloc_fn=*/NULL_TREE);
11067 if_stmt = begin_if_stmt ();
11068 finish_if_stmt_cond (build2 (BIT_AND_EXPR, integer_type_node,
11069 current_in_charge_parm,
11072 finish_expr_stmt (exprstmt);
11073 finish_then_clause (if_stmt);
11074 finish_if_stmt (if_stmt);
11077 if (targetm.cxx.cdtor_returns_this ())
11081 val = DECL_ARGUMENTS (current_function_decl);
11082 val = build2 (MODIFY_EXPR, TREE_TYPE (val),
11083 DECL_RESULT (current_function_decl), val);
11084 /* Return the address of the object. */
11085 exprstmt = build_stmt (RETURN_EXPR, val);
11086 add_stmt (exprstmt);
11090 /* Do the necessary processing for the beginning of a function body, which
11091 in this case includes member-initializers, but not the catch clauses of
11092 a function-try-block. Currently, this means opening a binding level
11093 for the member-initializers (in a ctor) and member cleanups (in a dtor). */
11096 begin_function_body (void)
11100 if (! FUNCTION_NEEDS_BODY_BLOCK (current_function_decl))
11103 if (processing_template_decl)
11104 /* Do nothing now. */;
11106 /* Always keep the BLOCK node associated with the outermost pair of
11107 curly braces of a function. These are needed for correct
11108 operation of dwarfout.c. */
11109 keep_next_level (true);
11111 stmt = begin_compound_stmt (BCS_FN_BODY);
11113 if (processing_template_decl)
11114 /* Do nothing now. */;
11115 else if (DECL_DESTRUCTOR_P (current_function_decl))
11116 begin_destructor_body ();
11121 /* Do the processing for the end of a function body. Currently, this means
11122 closing out the cleanups for fully-constructed bases and members, and in
11123 the case of the destructor, deleting the object if desired. Again, this
11124 is only meaningful for [cd]tors, since they are the only functions where
11125 there is a significant distinction between the main body and any
11126 function catch clauses. Handling, say, main() return semantics here
11127 would be wrong, as flowing off the end of a function catch clause for
11128 main() would also need to return 0. */
11131 finish_function_body (tree compstmt)
11133 if (compstmt == NULL_TREE)
11136 /* Close the block. */
11137 finish_compound_stmt (compstmt);
11139 if (processing_template_decl)
11140 /* Do nothing now. */;
11141 else if (DECL_CONSTRUCTOR_P (current_function_decl))
11142 finish_constructor_body ();
11143 else if (DECL_DESTRUCTOR_P (current_function_decl))
11144 finish_destructor_body ();
11147 /* Given a function, returns the BLOCK corresponding to the outermost level
11148 of curly braces, skipping the artificial block created for constructor
11152 outer_curly_brace_block (tree fndecl)
11154 tree block = BLOCK_SUBBLOCKS (DECL_INITIAL (fndecl));
11155 if (FUNCTION_NEEDS_BODY_BLOCK (current_function_decl))
11156 /* Skip the artificial function body block. */
11157 block = BLOCK_SUBBLOCKS (block);
11161 /* Finish up a function declaration and compile that function
11162 all the way to assembler language output. The free the storage
11163 for the function definition.
11165 FLAGS is a bitwise or of the following values:
11167 We just finished processing the body of an in-class inline
11168 function definition. (This processing will have taken place
11169 after the class definition is complete.) */
11172 finish_function (int flags)
11174 tree fndecl = current_function_decl;
11175 tree fntype, ctype = NULL_TREE;
11176 int inclass_inline = (flags & 2) != 0;
11179 /* When we get some parse errors, we can end up without a
11180 current_function_decl, so cope. */
11181 if (fndecl == NULL_TREE)
11182 return error_mark_node;
11184 if (DECL_NONSTATIC_MEMBER_FUNCTION_P (fndecl)
11185 && DECL_VIRTUAL_P (fndecl)
11186 && !processing_template_decl)
11188 tree fnclass = DECL_CONTEXT (fndecl);
11189 if (fndecl == CLASSTYPE_KEY_METHOD (fnclass))
11190 keyed_classes = tree_cons (NULL_TREE, fnclass, keyed_classes);
11193 nested = function_depth > 1;
11194 fntype = TREE_TYPE (fndecl);
11196 /* TREE_READONLY (fndecl) = 1;
11197 This caused &foo to be of type ptr-to-const-function
11198 which then got a warning when stored in a ptr-to-function variable. */
11200 gcc_assert (building_stmt_tree ());
11202 /* For a cloned function, we've already got all the code we need;
11203 there's no need to add any extra bits. */
11204 if (!DECL_CLONED_FUNCTION_P (fndecl))
11206 if (DECL_MAIN_P (current_function_decl))
11210 /* Make it so that `main' always returns 0 by default (or
11213 stmt = finish_return_stmt (integer_one_node);
11215 stmt = finish_return_stmt (integer_zero_node);
11217 /* Hack. We don't want the middle-end to warn that this
11218 return is unreachable, so put the statement on the
11220 #ifdef USE_MAPPED_LOCATION
11221 SET_EXPR_LOCATION (stmt, UNKNOWN_LOCATION);
11223 annotate_with_file_line (stmt, input_filename, 0);
11227 if (use_eh_spec_block (current_function_decl))
11228 finish_eh_spec_block (TYPE_RAISES_EXCEPTIONS
11229 (TREE_TYPE (current_function_decl)),
11230 current_eh_spec_block);
11233 /* If we're saving up tree structure, tie off the function now. */
11234 DECL_SAVED_TREE (fndecl) = pop_stmt_list (DECL_SAVED_TREE (fndecl));
11236 finish_fname_decls ();
11238 /* If this function can't throw any exceptions, remember that. */
11239 if (!processing_template_decl
11240 && !cp_function_chain->can_throw
11241 && !flag_non_call_exceptions
11242 && !DECL_REPLACEABLE_P (fndecl))
11243 TREE_NOTHROW (fndecl) = 1;
11245 /* This must come after expand_function_end because cleanups might
11246 have declarations (from inline functions) that need to go into
11247 this function's blocks. */
11249 /* If the current binding level isn't the outermost binding level
11250 for this function, either there is a bug, or we have experienced
11251 syntax errors and the statement tree is malformed. */
11252 if (current_binding_level->kind != sk_function_parms)
11254 /* Make sure we have already experienced errors. */
11255 gcc_assert (errorcount);
11257 /* Throw away the broken statement tree and extra binding
11259 DECL_SAVED_TREE (fndecl) = alloc_stmt_list ();
11261 while (current_binding_level->kind != sk_function_parms)
11263 if (current_binding_level->kind == sk_class)
11264 pop_nested_class ();
11266 poplevel (0, 0, 0);
11269 poplevel (1, 0, 1);
11271 /* Statements should always be full-expressions at the outermost set
11272 of curly braces for a function. */
11273 gcc_assert (stmts_are_full_exprs_p ());
11275 /* Set up the named return value optimization, if we can. Candidate
11276 variables are selected in check_return_value. */
11277 if (current_function_return_value)
11279 tree r = current_function_return_value;
11282 if (r != error_mark_node
11283 /* This is only worth doing for fns that return in memory--and
11284 simpler, since we don't have to worry about promoted modes. */
11285 && aggregate_value_p (TREE_TYPE (TREE_TYPE (fndecl)), fndecl)
11286 /* Only allow this for variables declared in the outer scope of
11287 the function so we know that their lifetime always ends with a
11288 return; see g++.dg/opt/nrv6.C. We could be more flexible if
11289 we were to do this optimization in tree-ssa. */
11290 && (outer = outer_curly_brace_block (fndecl))
11291 && chain_member (r, BLOCK_VARS (outer)))
11292 finalize_nrv (&DECL_SAVED_TREE (fndecl), r, DECL_RESULT (fndecl));
11294 current_function_return_value = NULL_TREE;
11297 /* Remember that we were in class scope. */
11298 if (current_class_name)
11299 ctype = current_class_type;
11301 /* Must mark the RESULT_DECL as being in this function. */
11302 DECL_CONTEXT (DECL_RESULT (fndecl)) = fndecl;
11304 /* Set the BLOCK_SUPERCONTEXT of the outermost function scope to point
11305 to the FUNCTION_DECL node itself. */
11306 BLOCK_SUPERCONTEXT (DECL_INITIAL (fndecl)) = fndecl;
11308 /* Save away current state, if appropriate. */
11309 if (!processing_template_decl)
11310 save_function_data (fndecl);
11312 /* Complain if there's just no return statement. */
11313 if (warn_return_type
11314 && TREE_CODE (TREE_TYPE (fntype)) != VOID_TYPE
11315 && !dependent_type_p (TREE_TYPE (fntype))
11316 && !current_function_returns_value && !current_function_returns_null
11317 /* Don't complain if we abort or throw. */
11318 && !current_function_returns_abnormally
11319 && !DECL_NAME (DECL_RESULT (fndecl))
11320 /* Normally, with -Wreturn-type, flow will complain. Unless we're an
11321 inline function, as we might never be compiled separately. */
11322 && (DECL_INLINE (fndecl) || processing_template_decl)
11323 /* Structor return values (if any) are set by the compiler. */
11324 && !DECL_CONSTRUCTOR_P (fndecl)
11325 && !DECL_DESTRUCTOR_P (fndecl))
11326 warning (OPT_Wreturn_type, "no return statement in function returning non-void");
11328 /* Store the end of the function, so that we get good line number
11329 info for the epilogue. */
11330 cfun->function_end_locus = input_location;
11332 /* Genericize before inlining. */
11333 if (!processing_template_decl)
11335 struct language_function *f = DECL_SAVED_FUNCTION_DATA (fndecl);
11336 cp_genericize (fndecl);
11337 /* Clear out the bits we don't need. */
11338 f->x_current_class_ptr = NULL;
11339 f->x_current_class_ref = NULL;
11340 f->x_eh_spec_block = NULL;
11341 f->x_in_charge_parm = NULL;
11342 f->x_vtt_parm = NULL;
11343 f->x_return_value = NULL;
11344 f->bindings = NULL;
11345 f->extern_decl_map = NULL;
11347 /* Handle attribute((warn_unused_result)). Relies on gimple input. */
11348 c_warn_unused_result (&DECL_SAVED_TREE (fndecl));
11350 /* Clear out the bits we don't need. */
11351 local_names = NULL;
11353 /* We're leaving the context of this function, so zap cfun. It's still in
11354 DECL_STRUCT_FUNCTION, and we'll restore it in tree_rest_of_compilation. */
11356 current_function_decl = NULL;
11358 /* If this is an in-class inline definition, we may have to pop the
11359 bindings for the template parameters that we added in
11360 maybe_begin_member_template_processing when start_function was
11362 if (inclass_inline)
11363 maybe_end_member_template_processing ();
11365 /* Leave the scope of the class. */
11367 pop_nested_class ();
11373 /* Let the error reporting routines know that we're outside a
11374 function. For a nested function, this value is used in
11375 cxx_pop_function_context and then reset via pop_function_context. */
11376 current_function_decl = NULL_TREE;
11381 /* Create the FUNCTION_DECL for a function definition.
11382 DECLSPECS and DECLARATOR are the parts of the declaration;
11383 they describe the return type and the name of the function,
11384 but twisted together in a fashion that parallels the syntax of C.
11386 This function creates a binding context for the function body
11387 as well as setting up the FUNCTION_DECL in current_function_decl.
11389 Returns a FUNCTION_DECL on success.
11391 If the DECLARATOR is not suitable for a function (it defines a datum
11392 instead), we return 0, which tells yyparse to report a parse error.
11394 May return void_type_node indicating that this method is actually
11395 a friend. See grokfield for more details.
11397 Came here with a `.pushlevel' .
11399 DO NOT MAKE ANY CHANGES TO THIS CODE WITHOUT MAKING CORRESPONDING
11400 CHANGES TO CODE IN `grokfield'. */
11403 start_method (cp_decl_specifier_seq *declspecs,
11404 const cp_declarator *declarator, tree attrlist)
11406 tree fndecl = grokdeclarator (declarator, declspecs, MEMFUNCDEF, 0,
11409 if (fndecl == error_mark_node)
11410 return error_mark_node;
11412 if (fndecl == NULL || TREE_CODE (fndecl) != FUNCTION_DECL)
11414 error ("invalid member function declaration");
11415 return error_mark_node;
11419 cplus_decl_attributes (&fndecl, attrlist, 0);
11421 /* Pass friends other than inline friend functions back. */
11422 if (fndecl == void_type_node)
11425 if (DECL_IN_AGGR_P (fndecl))
11427 if (DECL_CONTEXT (fndecl)
11428 && TREE_CODE (DECL_CONTEXT (fndecl)) != NAMESPACE_DECL)
11429 error ("%qD is already defined in class %qT", fndecl,
11430 DECL_CONTEXT (fndecl));
11431 return error_mark_node;
11434 check_template_shadow (fndecl);
11436 DECL_DECLARED_INLINE_P (fndecl) = 1;
11437 if (flag_default_inline)
11438 DECL_INLINE (fndecl) = 1;
11440 /* We process method specializations in finish_struct_1. */
11441 if (processing_template_decl && !DECL_TEMPLATE_SPECIALIZATION (fndecl))
11443 fndecl = push_template_decl (fndecl);
11444 if (fndecl == error_mark_node)
11448 if (! DECL_FRIEND_P (fndecl))
11450 if (TREE_CHAIN (fndecl))
11452 fndecl = copy_node (fndecl);
11453 TREE_CHAIN (fndecl) = NULL_TREE;
11457 finish_decl (fndecl, NULL_TREE, NULL_TREE);
11459 /* Make a place for the parms. */
11460 begin_scope (sk_function_parms, fndecl);
11462 DECL_IN_AGGR_P (fndecl) = 1;
11466 /* Go through the motions of finishing a function definition.
11467 We don't compile this method until after the whole class has
11470 FINISH_METHOD must return something that looks as though it
11471 came from GROKFIELD (since we are defining a method, after all).
11473 This is called after parsing the body of the function definition.
11474 STMTS is the chain of statements that makes up the function body.
11476 DECL is the ..._DECL that `start_method' provided. */
11479 finish_method (tree decl)
11481 tree fndecl = decl;
11486 if (decl == void_type_node)
11489 old_initial = DECL_INITIAL (fndecl);
11491 /* Undo the level for the parms (from start_method).
11492 This is like poplevel, but it causes nothing to be
11493 saved. Saving information here confuses symbol-table
11494 output routines. Besides, this information will
11495 be correctly output when this method is actually
11498 /* Clear out the meanings of the local variables of this level;
11499 also record in each decl which block it belongs to. */
11501 for (link = current_binding_level->names; link; link = TREE_CHAIN (link))
11503 if (DECL_NAME (link) != NULL_TREE)
11504 pop_binding (DECL_NAME (link), link);
11505 gcc_assert (TREE_CODE (link) != FUNCTION_DECL);
11506 DECL_CONTEXT (link) = NULL_TREE;
11509 poplevel (0, 0, 0);
11511 DECL_INITIAL (fndecl) = old_initial;
11513 /* We used to check if the context of FNDECL was different from
11514 current_class_type as another way to get inside here. This didn't work
11515 for String.cc in libg++. */
11516 if (DECL_FRIEND_P (fndecl))
11518 VEC_safe_push (tree, gc, CLASSTYPE_INLINE_FRIENDS (current_class_type),
11520 decl = void_type_node;
11527 /* VAR is a VAR_DECL. If its type is incomplete, remember VAR so that
11528 we can lay it out later, when and if its type becomes complete. */
11531 maybe_register_incomplete_var (tree var)
11533 gcc_assert (TREE_CODE (var) == VAR_DECL);
11535 /* Keep track of variables with incomplete types. */
11536 if (!processing_template_decl && TREE_TYPE (var) != error_mark_node
11537 && DECL_EXTERNAL (var))
11539 tree inner_type = TREE_TYPE (var);
11541 while (TREE_CODE (inner_type) == ARRAY_TYPE)
11542 inner_type = TREE_TYPE (inner_type);
11543 inner_type = TYPE_MAIN_VARIANT (inner_type);
11545 if ((!COMPLETE_TYPE_P (inner_type) && CLASS_TYPE_P (inner_type))
11546 /* RTTI TD entries are created while defining the type_info. */
11547 || (TYPE_LANG_SPECIFIC (inner_type)
11548 && TYPE_BEING_DEFINED (inner_type)))
11549 incomplete_vars = tree_cons (inner_type, var, incomplete_vars);
11553 /* Called when a class type (given by TYPE) is defined. If there are
11554 any existing VAR_DECLs whose type hsa been completed by this
11555 declaration, update them now. */
11558 complete_vars (tree type)
11560 tree *list = &incomplete_vars;
11562 gcc_assert (CLASS_TYPE_P (type));
11565 if (same_type_p (type, TREE_PURPOSE (*list)))
11567 tree var = TREE_VALUE (*list);
11568 tree type = TREE_TYPE (var);
11569 /* Complete the type of the variable. The VAR_DECL itself
11570 will be laid out in expand_expr. */
11571 complete_type (type);
11572 cp_apply_type_quals_to_decl (cp_type_quals (type), var);
11573 /* Remove this entry from the list. */
11574 *list = TREE_CHAIN (*list);
11577 list = &TREE_CHAIN (*list);
11580 /* Check for pending declarations which may have abstract type. */
11581 complete_type_check_abstract (type);
11584 /* If DECL is of a type which needs a cleanup, build that cleanup
11588 cxx_maybe_build_cleanup (tree decl)
11590 tree type = TREE_TYPE (decl);
11592 if (type != error_mark_node && TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type))
11594 int flags = LOOKUP_NORMAL|LOOKUP_DESTRUCTOR;
11596 bool has_vbases = (TREE_CODE (type) == RECORD_TYPE
11597 && CLASSTYPE_VBASECLASSES (type));
11599 if (TREE_CODE (type) == ARRAY_TYPE)
11603 cxx_mark_addressable (decl);
11604 rval = build_unary_op (ADDR_EXPR, decl, 0);
11607 /* Optimize for space over speed here. */
11608 if (!has_vbases || flag_expensive_optimizations)
11609 flags |= LOOKUP_NONVIRTUAL;
11611 rval = build_delete (TREE_TYPE (rval), rval,
11612 sfk_complete_destructor, flags, 0);
11619 /* When a stmt has been parsed, this function is called. */
11626 /* DECL was originally constructed as a non-static member function,
11627 but turned out to be static. Update it accordingly. */
11630 revert_static_member_fn (tree decl)
11633 tree function = TREE_TYPE (decl);
11634 tree args = TYPE_ARG_TYPES (function);
11636 if (cp_type_quals (TREE_TYPE (TREE_VALUE (args)))
11637 != TYPE_UNQUALIFIED)
11638 error ("static member function %q#D declared with type qualifiers", decl);
11640 args = TREE_CHAIN (args);
11641 tmp = build_function_type (TREE_TYPE (function), args);
11642 tmp = build_qualified_type (tmp, cp_type_quals (function));
11643 tmp = build_exception_variant (tmp,
11644 TYPE_RAISES_EXCEPTIONS (function));
11645 TREE_TYPE (decl) = tmp;
11646 if (DECL_ARGUMENTS (decl))
11647 DECL_ARGUMENTS (decl) = TREE_CHAIN (DECL_ARGUMENTS (decl));
11648 DECL_STATIC_FUNCTION_P (decl) = 1;
11651 /* Initialize the variables used during compilation of a C++
11655 cxx_push_function_context (struct function * f)
11657 struct language_function *p = GGC_CNEW (struct language_function);
11660 /* Whenever we start a new function, we destroy temporaries in the
11662 current_stmt_tree ()->stmts_are_full_exprs_p = 1;
11668 if (DECL_SAVED_FUNCTION_DATA (fn))
11670 /* If we already parsed this function, and we're just expanding it
11671 now, restore saved state. */
11672 *cp_function_chain = *DECL_SAVED_FUNCTION_DATA (fn);
11674 /* We don't need the saved data anymore. Unless this is an inline
11675 function; we need the named return value info for
11676 declare_return_variable. */
11677 if (! DECL_INLINE (fn))
11678 DECL_SAVED_FUNCTION_DATA (fn) = NULL;
11683 /* Free the language-specific parts of F, now that we've finished
11684 compiling the function. */
11687 cxx_pop_function_context (struct function * f)
11692 /* Return which tree structure is used by T, or TS_CP_GENERIC if T is
11693 one of the language-independent trees. */
11695 enum cp_tree_node_structure_enum
11696 cp_tree_node_structure (union lang_tree_node * t)
11698 switch (TREE_CODE (&t->generic))
11700 case DEFAULT_ARG: return TS_CP_DEFAULT_ARG;
11701 case IDENTIFIER_NODE: return TS_CP_IDENTIFIER;
11702 case OVERLOAD: return TS_CP_OVERLOAD;
11703 case TEMPLATE_PARM_INDEX: return TS_CP_TPI;
11704 case TINST_LEVEL: return TS_CP_TINST_LEVEL;
11705 case PTRMEM_CST: return TS_CP_PTRMEM;
11706 case BASELINK: return TS_CP_BASELINK;
11707 default: return TS_CP_GENERIC;
11711 /* Build the void_list_node (void_type_node having been created). */
11713 build_void_list_node (void)
11715 tree t = build_tree_list (NULL_TREE, void_type_node);
11720 cp_missing_noreturn_ok_p (tree decl)
11722 /* A missing noreturn is ok for the `main' function. */
11723 return DECL_MAIN_P (decl);
11726 /* Return the COMDAT group into which DECL should be placed. */
11729 cxx_comdat_group (tree decl)
11733 /* Virtual tables, construction virtual tables, and virtual table
11734 tables all go in a single COMDAT group, named after the primary
11736 if (TREE_CODE (decl) == VAR_DECL && DECL_VTABLE_OR_VTT_P (decl))
11737 name = DECL_ASSEMBLER_NAME (CLASSTYPE_VTABLES (DECL_CONTEXT (decl)));
11738 /* For all other DECLs, the COMDAT group is the mangled name of the
11739 declaration itself. */
11742 while (DECL_THUNK_P (decl))
11744 /* If TARGET_USE_LOCAL_THUNK_ALIAS_P, use_thunk puts the thunk
11745 into the same section as the target function. In that case
11746 we must return target's name. */
11747 tree target = THUNK_TARGET (decl);
11748 if (TARGET_USE_LOCAL_THUNK_ALIAS_P (target)
11749 && DECL_SECTION_NAME (target) != NULL
11750 && DECL_ONE_ONLY (target))
11755 name = DECL_ASSEMBLER_NAME (decl);
11758 return IDENTIFIER_POINTER (name);
11761 #include "gt-cp-decl.h"