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;
3162 current_lang_name = lang_name_c;
3164 /* Create the `std' namespace. */
3165 push_namespace (std_identifier);
3166 std_node = current_namespace;
3169 c_common_nodes_and_builtins ();
3171 java_byte_type_node = record_builtin_java_type ("__java_byte", 8);
3172 java_short_type_node = record_builtin_java_type ("__java_short", 16);
3173 java_int_type_node = record_builtin_java_type ("__java_int", 32);
3174 java_long_type_node = record_builtin_java_type ("__java_long", 64);
3175 java_float_type_node = record_builtin_java_type ("__java_float", -32);
3176 java_double_type_node = record_builtin_java_type ("__java_double", -64);
3177 java_char_type_node = record_builtin_java_type ("__java_char", -16);
3178 java_boolean_type_node = record_builtin_java_type ("__java_boolean", -1);
3180 integer_two_node = build_int_cst (NULL_TREE, 2);
3181 integer_three_node = build_int_cst (NULL_TREE, 3);
3183 record_builtin_type (RID_BOOL, "bool", boolean_type_node);
3184 truthvalue_type_node = boolean_type_node;
3185 truthvalue_false_node = boolean_false_node;
3186 truthvalue_true_node = boolean_true_node;
3188 empty_except_spec = build_tree_list (NULL_TREE, NULL_TREE);
3191 record_builtin_type (RID_MAX, NULL, string_type_node);
3194 delta_type_node = ptrdiff_type_node;
3195 vtable_index_type = ptrdiff_type_node;
3197 vtt_parm_type = build_pointer_type (const_ptr_type_node);
3198 void_ftype = build_function_type (void_type_node, void_list_node);
3199 void_ftype_ptr = build_function_type (void_type_node,
3200 tree_cons (NULL_TREE,
3204 = build_exception_variant (void_ftype_ptr, empty_except_spec);
3206 /* C++ extensions */
3208 unknown_type_node = make_node (UNKNOWN_TYPE);
3209 record_unknown_type (unknown_type_node, "unknown type");
3211 /* Indirecting an UNKNOWN_TYPE node yields an UNKNOWN_TYPE node. */
3212 TREE_TYPE (unknown_type_node) = unknown_type_node;
3214 /* Looking up TYPE_POINTER_TO and TYPE_REFERENCE_TO yield the same
3216 TYPE_POINTER_TO (unknown_type_node) = unknown_type_node;
3217 TYPE_REFERENCE_TO (unknown_type_node) = unknown_type_node;
3220 /* Make sure we get a unique function type, so we can give
3221 its pointer type a name. (This wins for gdb.) */
3222 tree vfunc_type = make_node (FUNCTION_TYPE);
3223 TREE_TYPE (vfunc_type) = integer_type_node;
3224 TYPE_ARG_TYPES (vfunc_type) = NULL_TREE;
3225 layout_type (vfunc_type);
3227 vtable_entry_type = build_pointer_type (vfunc_type);
3229 record_builtin_type (RID_MAX, VTBL_PTR_TYPE, vtable_entry_type);
3232 = build_cplus_array_type (vtable_entry_type, NULL_TREE);
3233 layout_type (vtbl_type_node);
3234 vtbl_type_node = build_qualified_type (vtbl_type_node, TYPE_QUAL_CONST);
3235 record_builtin_type (RID_MAX, NULL, vtbl_type_node);
3236 vtbl_ptr_type_node = build_pointer_type (vtable_entry_type);
3237 layout_type (vtbl_ptr_type_node);
3238 record_builtin_type (RID_MAX, NULL, vtbl_ptr_type_node);
3240 push_namespace (get_identifier ("__cxxabiv1"));
3241 abi_node = current_namespace;
3244 global_type_node = make_node (LANG_TYPE);
3245 record_unknown_type (global_type_node, "global type");
3248 current_lang_name = lang_name_cplusplus;
3252 tree bad_alloc_type_node;
3253 tree bad_alloc_decl;
3254 tree newtype, deltype;
3255 tree ptr_ftype_sizetype;
3257 push_namespace (std_identifier);
3258 bad_alloc_id = get_identifier ("bad_alloc");
3259 bad_alloc_type_node = make_aggr_type (RECORD_TYPE);
3260 TYPE_CONTEXT (bad_alloc_type_node) = current_namespace;
3262 = create_implicit_typedef (bad_alloc_id, bad_alloc_type_node);
3263 DECL_CONTEXT (bad_alloc_decl) = current_namespace;
3264 TYPE_STUB_DECL (bad_alloc_type_node) = bad_alloc_decl;
3268 = build_function_type (ptr_type_node,
3269 tree_cons (NULL_TREE,
3272 newtype = build_exception_variant
3273 (ptr_ftype_sizetype, add_exception_specifier
3274 (NULL_TREE, bad_alloc_type_node, -1));
3275 deltype = build_exception_variant (void_ftype_ptr, empty_except_spec);
3276 push_cp_library_fn (NEW_EXPR, newtype);
3277 push_cp_library_fn (VEC_NEW_EXPR, newtype);
3278 global_delete_fndecl = push_cp_library_fn (DELETE_EXPR, deltype);
3279 push_cp_library_fn (VEC_DELETE_EXPR, deltype);
3283 = build_library_fn_ptr ("__cxa_pure_virtual", void_ftype);
3285 /* Perform other language dependent initializations. */
3286 init_class_processing ();
3287 init_rtti_processing ();
3289 if (flag_exceptions)
3290 init_exception_processing ();
3292 if (! supports_one_only ())
3295 make_fname_decl = cp_make_fname_decl;
3296 start_fname_decls ();
3298 /* Show we use EH for cleanups. */
3299 if (flag_exceptions)
3300 using_eh_for_cleanups ();
3303 /* Generate an initializer for a function naming variable from
3304 NAME. NAME may be NULL, to indicate a dependent name. TYPE_P is
3305 filled in with the type of the init. */
3308 cp_fname_init (const char* name, tree *type_p)
3310 tree domain = NULL_TREE;
3312 tree init = NULL_TREE;
3317 length = strlen (name);
3318 domain = build_index_type (size_int (length));
3319 init = build_string (length + 1, name);
3322 type = build_qualified_type (char_type_node, TYPE_QUAL_CONST);
3323 type = build_cplus_array_type (type, domain);
3328 TREE_TYPE (init) = type;
3330 init = error_mark_node;
3335 /* Create the VAR_DECL for __FUNCTION__ etc. ID is the name to give the
3336 decl, NAME is the initialization string and TYPE_DEP indicates whether
3337 NAME depended on the type of the function. We make use of that to detect
3338 __PRETTY_FUNCTION__ inside a template fn. This is being done
3339 lazily at the point of first use, so we mustn't push the decl now. */
3342 cp_make_fname_decl (tree id, int type_dep)
3344 const char *const name = (type_dep && processing_template_decl
3345 ? NULL : fname_as_string (type_dep));
3347 tree init = cp_fname_init (name, &type);
3348 tree decl = build_decl (VAR_DECL, id, type);
3351 free ((char *) name);
3353 /* As we're using pushdecl_with_scope, we must set the context. */
3354 DECL_CONTEXT (decl) = current_function_decl;
3355 DECL_PRETTY_FUNCTION_P (decl) = type_dep;
3357 TREE_STATIC (decl) = 1;
3358 TREE_READONLY (decl) = 1;
3359 DECL_ARTIFICIAL (decl) = 1;
3361 TREE_USED (decl) = 1;
3363 if (current_function_decl)
3365 struct cp_binding_level *b = current_binding_level;
3366 while (b->level_chain->kind != sk_function_parms)
3368 pushdecl_with_scope (decl, b, /*is_friend=*/false);
3369 cp_finish_decl (decl, init, /*init_const_expr_p=*/false, NULL_TREE,
3370 LOOKUP_ONLYCONVERTING);
3373 pushdecl_top_level_and_finish (decl, init);
3378 /* Make a definition for a builtin function named NAME in the current
3379 namespace, whose data type is TYPE and whose context is CONTEXT.
3380 TYPE should be a function type with argument types.
3382 CLASS and CODE tell later passes how to compile calls to this function.
3383 See tree.h for possible values.
3385 If LIBNAME is nonzero, use that for DECL_ASSEMBLER_NAME,
3386 the name to be called if we can't opencode the function.
3387 If ATTRS is nonzero, use that for the function's attribute
3391 builtin_function_1 (const char* name,
3394 enum built_in_function code,
3395 enum built_in_class class,
3396 const char* libname,
3399 tree decl = build_library_fn_1 (get_identifier (name), ERROR_MARK, type);
3400 DECL_BUILT_IN_CLASS (decl) = class;
3401 DECL_FUNCTION_CODE (decl) = code;
3402 DECL_CONTEXT (decl) = context;
3406 /* Since `pushdecl' relies on DECL_ASSEMBLER_NAME instead of DECL_NAME,
3407 we cannot change DECL_ASSEMBLER_NAME until we have installed this
3408 function in the namespace. */
3410 SET_DECL_ASSEMBLER_NAME (decl, get_identifier (libname));
3412 /* A function in the user's namespace should have an explicit
3413 declaration before it is used. Mark the built-in function as
3414 anticipated but not actually declared. */
3415 if (name[0] != '_' || name[1] != '_')
3416 DECL_ANTICIPATED (decl) = 1;
3418 /* Possibly apply some default attributes to this built-in function. */
3420 decl_attributes (&decl, attrs, ATTR_FLAG_BUILT_IN);
3422 decl_attributes (&decl, NULL_TREE, 0);
3427 /* Entry point for the benefit of c_common_nodes_and_builtins.
3429 Make a definition for a builtin function named NAME and whose data type
3430 is TYPE. TYPE should be a function type with argument types. This
3431 function places the anticipated declaration in the global namespace
3432 and additionally in the std namespace if appropriate.
3434 CLASS and CODE tell later passes how to compile calls to this function.
3435 See tree.h for possible values.
3437 If LIBNAME is nonzero, use that for DECL_ASSEMBLER_NAME,
3438 the name to be called if we can't opencode the function.
3440 If ATTRS is nonzero, use that for the function's attribute
3444 builtin_function (const char* name,
3447 enum built_in_class cl,
3448 const char* libname,
3451 /* All builtins that don't begin with an '_' should additionally
3452 go in the 'std' namespace. */
3455 push_namespace (std_identifier);
3456 builtin_function_1 (name, type, std_node, code, cl, libname, attrs);
3460 return builtin_function_1 (name, type, NULL_TREE, code,
3461 cl, libname, attrs);
3464 /* Generate a FUNCTION_DECL with the typical flags for a runtime library
3465 function. Not called directly. */
3468 build_library_fn_1 (tree name, enum tree_code operator_code, tree type)
3470 tree fn = build_lang_decl (FUNCTION_DECL, name, type);
3471 DECL_EXTERNAL (fn) = 1;
3472 TREE_PUBLIC (fn) = 1;
3473 DECL_ARTIFICIAL (fn) = 1;
3474 SET_OVERLOADED_OPERATOR_CODE (fn, operator_code);
3475 SET_DECL_LANGUAGE (fn, lang_c);
3476 /* Runtime library routines are, by definition, available in an
3477 external shared object. */
3478 DECL_VISIBILITY (fn) = VISIBILITY_DEFAULT;
3479 DECL_VISIBILITY_SPECIFIED (fn) = 1;
3483 /* Returns the _DECL for a library function with C linkage.
3484 We assume that such functions never throw; if this is incorrect,
3485 callers should unset TREE_NOTHROW. */
3488 build_library_fn (tree name, tree type)
3490 tree fn = build_library_fn_1 (name, ERROR_MARK, type);
3491 TREE_NOTHROW (fn) = 1;
3495 /* Returns the _DECL for a library function with C++ linkage. */
3498 build_cp_library_fn (tree name, enum tree_code operator_code, tree type)
3500 tree fn = build_library_fn_1 (name, operator_code, type);
3501 TREE_NOTHROW (fn) = TYPE_NOTHROW_P (type);
3502 DECL_CONTEXT (fn) = FROB_CONTEXT (current_namespace);
3503 SET_DECL_LANGUAGE (fn, lang_cplusplus);
3507 /* Like build_library_fn, but takes a C string instead of an
3511 build_library_fn_ptr (const char* name, tree type)
3513 return build_library_fn (get_identifier (name), type);
3516 /* Like build_cp_library_fn, but takes a C string instead of an
3520 build_cp_library_fn_ptr (const char* name, tree type)
3522 return build_cp_library_fn (get_identifier (name), ERROR_MARK, type);
3525 /* Like build_library_fn, but also pushes the function so that we will
3526 be able to find it via IDENTIFIER_GLOBAL_VALUE. */
3529 push_library_fn (tree name, tree type)
3531 tree fn = build_library_fn (name, type);
3532 pushdecl_top_level (fn);
3536 /* Like build_cp_library_fn, but also pushes the function so that it
3537 will be found by normal lookup. */
3540 push_cp_library_fn (enum tree_code operator_code, tree type)
3542 tree fn = build_cp_library_fn (ansi_opname (operator_code),
3549 /* Like push_library_fn, but takes a TREE_LIST of parm types rather than
3553 push_void_library_fn (tree name, tree parmtypes)
3555 tree type = build_function_type (void_type_node, parmtypes);
3556 return push_library_fn (name, type);
3559 /* Like push_library_fn, but also note that this function throws
3560 and does not return. Used for __throw_foo and the like. */
3563 push_throw_library_fn (tree name, tree type)
3565 tree fn = push_library_fn (name, type);
3566 TREE_THIS_VOLATILE (fn) = 1;
3567 TREE_NOTHROW (fn) = 0;
3571 /* When we call finish_struct for an anonymous union, we create
3572 default copy constructors and such. But, an anonymous union
3573 shouldn't have such things; this function undoes the damage to the
3574 anonymous union type T.
3576 (The reason that we create the synthesized methods is that we don't
3577 distinguish `union { int i; }' from `typedef union { int i; } U'.
3578 The first is an anonymous union; the second is just an ordinary
3582 fixup_anonymous_aggr (tree t)
3586 /* Wipe out memory of synthesized methods. */
3587 TYPE_HAS_CONSTRUCTOR (t) = 0;
3588 TYPE_HAS_DEFAULT_CONSTRUCTOR (t) = 0;
3589 TYPE_HAS_INIT_REF (t) = 0;
3590 TYPE_HAS_CONST_INIT_REF (t) = 0;
3591 TYPE_HAS_ASSIGN_REF (t) = 0;
3592 TYPE_HAS_CONST_ASSIGN_REF (t) = 0;
3594 /* Splice the implicitly generated functions out of the TYPE_METHODS
3596 q = &TYPE_METHODS (t);
3599 if (DECL_ARTIFICIAL (*q))
3600 *q = TREE_CHAIN (*q);
3602 q = &TREE_CHAIN (*q);
3605 /* ISO C++ 9.5.3. Anonymous unions may not have function members. */
3606 if (TYPE_METHODS (t))
3607 error ("%Jan anonymous union cannot have function members",
3608 TYPE_MAIN_DECL (t));
3610 /* Anonymous aggregates cannot have fields with ctors, dtors or complex
3611 assignment operators (because they cannot have these methods themselves).
3612 For anonymous unions this is already checked because they are not allowed
3613 in any union, otherwise we have to check it. */
3614 if (TREE_CODE (t) != UNION_TYPE)
3618 for (field = TYPE_FIELDS (t); field; field = TREE_CHAIN (field))
3619 if (TREE_CODE (field) == FIELD_DECL)
3621 type = TREE_TYPE (field);
3622 if (CLASS_TYPE_P (type))
3624 if (TYPE_NEEDS_CONSTRUCTING (type))
3625 error ("member %q+#D with constructor not allowed "
3626 "in anonymous aggregate", field);
3627 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type))
3628 error ("member %q+#D with destructor not allowed "
3629 "in anonymous aggregate", field);
3630 if (TYPE_HAS_COMPLEX_ASSIGN_REF (type))
3631 error ("member %q+#D with copy assignment operator "
3632 "not allowed in anonymous aggregate", field);
3638 /* Make sure that a declaration with no declarator is well-formed, i.e.
3639 just declares a tagged type or anonymous union.
3641 Returns the type declared; or NULL_TREE if none. */
3644 check_tag_decl (cp_decl_specifier_seq *declspecs)
3646 int saw_friend = declspecs->specs[(int)ds_friend] != 0;
3647 int saw_typedef = declspecs->specs[(int)ds_typedef] != 0;
3648 /* If a class, struct, or enum type is declared by the DECLSPECS
3649 (i.e, if a class-specifier, enum-specifier, or non-typename
3650 elaborated-type-specifier appears in the DECLSPECS),
3651 DECLARED_TYPE is set to the corresponding type. */
3652 tree declared_type = NULL_TREE;
3653 bool error_p = false;
3655 if (declspecs->multiple_types_p)
3656 error ("multiple types in one declaration");
3657 else if (declspecs->redefined_builtin_type)
3659 if (!in_system_header)
3660 pedwarn ("redeclaration of C++ built-in type %qT",
3661 declspecs->redefined_builtin_type);
3666 && TYPE_P (declspecs->type)
3667 && ((TREE_CODE (declspecs->type) != TYPENAME_TYPE
3668 && IS_AGGR_TYPE (declspecs->type))
3669 || TREE_CODE (declspecs->type) == ENUMERAL_TYPE))
3670 declared_type = declspecs->type;
3671 else if (declspecs->type == error_mark_node)
3673 if (declared_type == NULL_TREE && ! saw_friend && !error_p)
3674 pedwarn ("declaration does not declare anything");
3675 /* Check for an anonymous union. */
3676 else if (declared_type && IS_AGGR_TYPE_CODE (TREE_CODE (declared_type))
3677 && TYPE_ANONYMOUS_P (declared_type))
3679 /* 7/3 In a simple-declaration, the optional init-declarator-list
3680 can be omitted only when declaring a class (clause 9) or
3681 enumeration (7.2), that is, when the decl-specifier-seq contains
3682 either a class-specifier, an elaborated-type-specifier with
3683 a class-key (9.1), or an enum-specifier. In these cases and
3684 whenever a class-specifier or enum-specifier is present in the
3685 decl-specifier-seq, the identifiers in these specifiers are among
3686 the names being declared by the declaration (as class-name,
3687 enum-names, or enumerators, depending on the syntax). In such
3688 cases, and except for the declaration of an unnamed bit-field (9.6),
3689 the decl-specifier-seq shall introduce one or more names into the
3690 program, or shall redeclare a name introduced by a previous
3691 declaration. [Example:
3692 enum { }; // ill-formed
3693 typedef class { }; // ill-formed
3697 error ("missing type-name in typedef-declaration");
3700 /* Anonymous unions are objects, so they can have specifiers. */;
3701 SET_ANON_AGGR_TYPE_P (declared_type);
3703 if (TREE_CODE (declared_type) != UNION_TYPE && pedantic
3704 && !in_system_header)
3705 pedwarn ("ISO C++ prohibits anonymous structs");
3710 if (declspecs->specs[(int)ds_inline]
3711 || declspecs->specs[(int)ds_virtual])
3712 error ("%qs can only be specified for functions",
3713 declspecs->specs[(int)ds_inline]
3714 ? "inline" : "virtual");
3716 && (!current_class_type
3717 || current_scope () != current_class_type))
3718 error ("%<friend%> can only be specified inside a class");
3719 else if (declspecs->specs[(int)ds_explicit])
3720 error ("%<explicit%> can only be specified for constructors");
3721 else if (declspecs->storage_class)
3722 error ("a storage class can only be specified for objects "
3724 else if (declspecs->specs[(int)ds_const]
3725 || declspecs->specs[(int)ds_volatile]
3726 || declspecs->specs[(int)ds_restrict]
3727 || declspecs->specs[(int)ds_thread])
3728 error ("qualifiers can only be specified for objects "
3732 return declared_type;
3735 /* Called when a declaration is seen that contains no names to declare.
3736 If its type is a reference to a structure, union or enum inherited
3737 from a containing scope, shadow that tag name for the current scope
3738 with a forward reference.
3739 If its type defines a new named structure or union
3740 or defines an enum, it is valid but we need not do anything here.
3741 Otherwise, it is an error.
3743 C++: may have to grok the declspecs to learn about static,
3744 complain for anonymous unions.
3746 Returns the TYPE declared -- or NULL_TREE if none. */
3749 shadow_tag (cp_decl_specifier_seq *declspecs)
3751 tree t = check_tag_decl (declspecs);
3756 if (declspecs->attributes)
3758 warning (0, "attribute ignored in declaration of %q+#T", t);
3759 warning (0, "attribute for %q+#T must follow the %qs keyword",
3760 t, class_key_or_enum_as_string (t));
3764 if (maybe_process_partial_specialization (t) == error_mark_node)
3767 /* This is where the variables in an anonymous union are
3768 declared. An anonymous union declaration looks like:
3770 because there is no declarator after the union, the parser
3771 sends that declaration here. */
3772 if (ANON_AGGR_TYPE_P (t))
3774 fixup_anonymous_aggr (t);
3776 if (TYPE_FIELDS (t))
3778 tree decl = grokdeclarator (/*declarator=*/NULL,
3779 declspecs, NORMAL, 0, NULL);
3780 finish_anon_union (decl);
3787 /* Decode a "typename", such as "int **", returning a ..._TYPE node. */
3790 groktypename (cp_decl_specifier_seq *type_specifiers,
3791 const cp_declarator *declarator)
3795 attrs = type_specifiers->attributes;
3796 type_specifiers->attributes = NULL_TREE;
3797 type = grokdeclarator (declarator, type_specifiers, TYPENAME, 0, &attrs);
3799 cplus_decl_attributes (&type, attrs, 0);
3803 /* Decode a declarator in an ordinary declaration or data definition.
3804 This is called as soon as the type information and variable name
3805 have been parsed, before parsing the initializer if any.
3806 Here we create the ..._DECL node, fill in its type,
3807 and put it on the list of decls for the current context.
3808 The ..._DECL node is returned as the value.
3810 Exception: for arrays where the length is not specified,
3811 the type is left null, to be filled in by `cp_finish_decl'.
3813 Function definitions do not come here; they go to start_function
3814 instead. However, external and forward declarations of functions
3815 do go through here. Structure field declarations are done by
3816 grokfield and not through here. */
3819 start_decl (const cp_declarator *declarator,
3820 cp_decl_specifier_seq *declspecs,
3823 tree prefix_attributes,
3824 tree *pushed_scope_p)
3831 *pushed_scope_p = NULL_TREE;
3833 /* An object declared as __attribute__((deprecated)) suppresses
3834 warnings of uses of other deprecated items. */
3835 if (lookup_attribute ("deprecated", attributes))
3836 deprecated_state = DEPRECATED_SUPPRESS;
3838 attributes = chainon (attributes, prefix_attributes);
3840 decl = grokdeclarator (declarator, declspecs, NORMAL, initialized,
3843 deprecated_state = DEPRECATED_NORMAL;
3845 if (decl == NULL_TREE || TREE_CODE (decl) == VOID_TYPE
3846 || decl == error_mark_node)
3847 return error_mark_node;
3849 type = TREE_TYPE (decl);
3851 context = DECL_CONTEXT (decl);
3855 *pushed_scope_p = push_scope (context);
3857 /* We are only interested in class contexts, later. */
3858 if (TREE_CODE (context) == NAMESPACE_DECL)
3859 context = NULL_TREE;
3863 /* Is it valid for this decl to have an initializer at all?
3864 If not, set INITIALIZED to zero, which will indirectly
3865 tell `cp_finish_decl' to ignore the initializer once it is parsed. */
3866 switch (TREE_CODE (decl))
3869 error ("typedef %qD is initialized (use __typeof__ instead)", decl);
3870 return error_mark_node;
3873 error ("function %q#D is initialized like a variable", decl);
3874 return error_mark_node;
3882 if (! toplevel_bindings_p ()
3883 && DECL_EXTERNAL (decl))
3884 warning (0, "declaration of %q#D has %<extern%> and is initialized",
3886 DECL_EXTERNAL (decl) = 0;
3887 if (toplevel_bindings_p ())
3888 TREE_STATIC (decl) = 1;
3891 /* Set attributes here so if duplicate decl, will have proper attributes. */
3892 cplus_decl_attributes (&decl, attributes, 0);
3894 /* Dllimported symbols cannot be defined. Static data members (which
3895 can be initialized in-class and dllimported) go through grokfield,
3896 not here, so we don't need to exclude those decls when checking for
3898 if (initialized && DECL_DLLIMPORT_P (decl))
3900 error ("definition of %q#D is marked %<dllimport%>", decl);
3901 DECL_DLLIMPORT_P (decl) = 0;
3904 /* If #pragma weak was used, mark the decl weak now. */
3905 maybe_apply_pragma_weak (decl);
3907 if (TREE_CODE (decl) == FUNCTION_DECL
3908 && DECL_DECLARED_INLINE_P (decl)
3909 && DECL_UNINLINABLE (decl)
3910 && lookup_attribute ("noinline", DECL_ATTRIBUTES (decl)))
3911 warning (0, "inline function %q+D given attribute noinline", decl);
3913 if (context && COMPLETE_TYPE_P (complete_type (context)))
3915 if (TREE_CODE (decl) == VAR_DECL)
3917 tree field = lookup_field (context, DECL_NAME (decl), 0, false);
3918 if (field == NULL_TREE || TREE_CODE (field) != VAR_DECL)
3919 error ("%q#D is not a static member of %q#T", decl, context);
3922 if (DECL_CONTEXT (field) != context)
3924 if (!same_type_p (DECL_CONTEXT (field), context))
3925 pedwarn ("ISO C++ does not permit %<%T::%D%> "
3926 "to be defined as %<%T::%D%>",
3927 DECL_CONTEXT (field), DECL_NAME (decl),
3928 context, DECL_NAME (decl));
3929 DECL_CONTEXT (decl) = DECL_CONTEXT (field);
3931 if (processing_specialization
3932 && template_class_depth (context) == 0
3933 && CLASSTYPE_TEMPLATE_SPECIALIZATION (context))
3934 error ("template header not allowed in member definition "
3935 "of explicitly specialized class");
3936 /* Static data member are tricky; an in-class initialization
3937 still doesn't provide a definition, so the in-class
3938 declaration will have DECL_EXTERNAL set, but will have an
3939 initialization. Thus, duplicate_decls won't warn
3940 about this situation, and so we check here. */
3941 if (initialized && DECL_INITIALIZED_IN_CLASS_P (field))
3942 error ("duplicate initialization of %qD", decl);
3943 if (duplicate_decls (decl, field, /*newdecl_is_friend=*/false))
3949 tree field = check_classfn (context, decl,
3950 (processing_template_decl
3951 > template_class_depth (context))
3952 ? current_template_parms
3954 if (field && duplicate_decls (decl, field,
3955 /*newdecl_is_friend=*/false))
3959 /* cp_finish_decl sets DECL_EXTERNAL if DECL_IN_AGGR_P is set. */
3960 DECL_IN_AGGR_P (decl) = 0;
3961 /* Do not mark DECL as an explicit specialization if it was not
3962 already marked as an instantiation; a declaration should
3963 never be marked as a specialization unless we know what
3964 template is being specialized. */
3965 if (DECL_LANG_SPECIFIC (decl) && DECL_USE_TEMPLATE (decl))
3967 SET_DECL_TEMPLATE_SPECIALIZATION (decl);
3969 /* [temp.expl.spec] An explicit specialization of a static data
3970 member of a template is a definition if the declaration
3971 includes an initializer; otherwise, it is a declaration.
3973 We check for processing_specialization so this only applies
3974 to the new specialization syntax. */
3975 if (!initialized && processing_specialization)
3976 DECL_EXTERNAL (decl) = 1;
3979 if (DECL_EXTERNAL (decl) && ! DECL_TEMPLATE_SPECIALIZATION (decl))
3980 pedwarn ("declaration of %q#D outside of class is not definition",
3984 was_public = TREE_PUBLIC (decl);
3986 /* Enter this declaration into the symbol table. */
3987 tem = maybe_push_decl (decl);
3989 if (processing_template_decl)
3990 tem = push_template_decl (tem);
3991 if (tem == error_mark_node)
3992 return error_mark_node;
3994 /* Tell the back-end to use or not use .common as appropriate. If we say
3995 -fconserve-space, we want this to save .data space, at the expense of
3996 wrong semantics. If we say -fno-conserve-space, we want this to
3997 produce errors about redefs; to do this we force variables into the
3999 if (flag_conserve_space
4000 && TREE_CODE (tem) == VAR_DECL
4001 && TREE_PUBLIC (tem)
4002 && !DECL_THREAD_LOCAL_P (tem)
4003 && !have_global_bss_p ())
4004 DECL_COMMON (tem) = 1;
4006 if (TREE_CODE (tem) == VAR_DECL
4007 && DECL_NAMESPACE_SCOPE_P (tem) && !TREE_PUBLIC (tem) && !was_public
4008 && !DECL_THIS_STATIC (tem) && !DECL_ARTIFICIAL (tem))
4010 /* This is a const variable with implicit 'static'. Set
4011 DECL_THIS_STATIC so we can tell it from variables that are
4012 !TREE_PUBLIC because of the anonymous namespace. */
4013 gcc_assert (cp_type_readonly (TREE_TYPE (tem)));
4014 DECL_THIS_STATIC (tem) = 1;
4017 if (!processing_template_decl && TREE_CODE (tem) == VAR_DECL)
4018 start_decl_1 (tem, initialized);
4024 start_decl_1 (tree decl, bool initialized)
4028 gcc_assert (!processing_template_decl);
4030 if (error_operand_p (decl))
4033 gcc_assert (TREE_CODE (decl) == VAR_DECL);
4034 type = TREE_TYPE (decl);
4037 /* Is it valid for this decl to have an initializer at all?
4038 If not, set INITIALIZED to zero, which will indirectly
4039 tell `cp_finish_decl' to ignore the initializer once it is parsed. */
4041 /* Don't allow initializations for incomplete types except for
4042 arrays which might be completed by the initialization. */
4043 if (COMPLETE_TYPE_P (complete_type (type)))
4044 ; /* A complete type is ok. */
4045 else if (TREE_CODE (type) != ARRAY_TYPE)
4047 error ("variable %q#D has initializer but incomplete type", decl);
4049 type = TREE_TYPE (decl) = error_mark_node;
4051 else if (!COMPLETE_TYPE_P (complete_type (TREE_TYPE (type))))
4053 if (DECL_LANG_SPECIFIC (decl) && DECL_TEMPLATE_INFO (decl))
4054 error ("elements of array %q#D have incomplete type", decl);
4055 /* else we already gave an error in start_decl. */
4059 else if (IS_AGGR_TYPE (type)
4060 && ! DECL_EXTERNAL (decl))
4062 if (!COMPLETE_TYPE_P (complete_type (type)))
4064 error ("aggregate %q#D has incomplete type and cannot be defined",
4066 /* Change the type so that assemble_variable will give
4067 DECL an rtl we can live with: (mem (const_int 0)). */
4068 type = TREE_TYPE (decl) = error_mark_node;
4072 /* If any base type in the hierarchy of TYPE needs a constructor,
4073 then we set initialized to 1. This way any nodes which are
4074 created for the purposes of initializing this aggregate
4075 will live as long as it does. This is necessary for global
4076 aggregates which do not have their initializers processed until
4077 the end of the file. */
4078 initialized = TYPE_NEEDS_CONSTRUCTING (type);
4082 /* Create a new scope to hold this declaration if necessary.
4083 Whether or not a new scope is necessary cannot be determined
4084 until after the type has been completed; if the type is a
4085 specialization of a class template it is not until after
4086 instantiation has occurred that TYPE_HAS_NONTRIVIAL_DESTRUCTOR
4087 will be set correctly. */
4088 maybe_push_cleanup_level (type);
4091 /* Handle initialization of references. DECL, TYPE, and INIT have the
4092 same meaning as in cp_finish_decl. *CLEANUP must be NULL on entry,
4093 but will be set to a new CLEANUP_STMT if a temporary is created
4094 that must be destroyed subsequently.
4096 Returns an initializer expression to use to initialize DECL, or
4097 NULL if the initialization can be performed statically.
4099 Quotes on semantics can be found in ARM 8.4.3. */
4102 grok_reference_init (tree decl, tree type, tree init, tree *cleanup)
4106 if (init == NULL_TREE)
4108 if ((DECL_LANG_SPECIFIC (decl) == 0
4109 || DECL_IN_AGGR_P (decl) == 0)
4110 && ! DECL_THIS_EXTERN (decl))
4111 error ("%qD declared as reference but not initialized", decl);
4115 if (TREE_CODE (init) == CONSTRUCTOR)
4117 error ("ISO C++ forbids use of initializer list to "
4118 "initialize reference %qD", decl);
4122 if (TREE_CODE (init) == TREE_LIST)
4123 init = build_x_compound_expr_from_list (init, "initializer");
4125 if (TREE_CODE (TREE_TYPE (type)) != ARRAY_TYPE
4126 && TREE_CODE (TREE_TYPE (init)) == ARRAY_TYPE)
4127 /* Note: default conversion is only called in very special cases. */
4128 init = decay_conversion (init);
4130 /* Convert INIT to the reference type TYPE. This may involve the
4131 creation of a temporary, whose lifetime must be the same as that
4132 of the reference. If so, a DECL_EXPR for the temporary will be
4133 added just after the DECL_EXPR for DECL. That's why we don't set
4134 DECL_INITIAL for local references (instead assigning to them
4135 explicitly); we need to allow the temporary to be initialized
4137 tmp = initialize_reference (type, init, decl, cleanup);
4139 if (tmp == error_mark_node)
4141 else if (tmp == NULL_TREE)
4143 error ("cannot initialize %qT from %qT", type, TREE_TYPE (init));
4147 if (TREE_STATIC (decl) && !TREE_CONSTANT (tmp))
4150 DECL_INITIAL (decl) = tmp;
4155 /* Designated initializers in arrays are not supported in GNU C++.
4156 The parser cannot detect this error since it does not know whether
4157 a given brace-enclosed initializer is for a class type or for an
4158 array. This function checks that CE does not use a designated
4159 initializer. If it does, an error is issued. Returns true if CE
4160 is valid, i.e., does not have a designated initializer. */
4163 check_array_designated_initializer (const constructor_elt *ce)
4165 /* Designated initializers for array elements arenot supported. */
4168 /* The parser only allows identifiers as designated
4170 gcc_assert (TREE_CODE (ce->index) == IDENTIFIER_NODE);
4171 error ("name %qD used in a GNU-style designated "
4172 "initializer for an array", ce->index);
4179 /* When parsing `int a[] = {1, 2};' we don't know the size of the
4180 array until we finish parsing the initializer. If that's the
4181 situation we're in, update DECL accordingly. */
4184 maybe_deduce_size_from_array_init (tree decl, tree init)
4186 tree type = TREE_TYPE (decl);
4188 if (TREE_CODE (type) == ARRAY_TYPE
4189 && TYPE_DOMAIN (type) == NULL_TREE
4190 && TREE_CODE (decl) != TYPE_DECL)
4192 /* do_default is really a C-ism to deal with tentative definitions.
4193 But let's leave it here to ease the eventual merge. */
4194 int do_default = !DECL_EXTERNAL (decl);
4195 tree initializer = init ? init : DECL_INITIAL (decl);
4198 /* Check that there are no designated initializers in INIT, as
4199 those are not supported in GNU C++, and as the middle-end
4200 will crash if presented with a non-numeric designated
4202 if (initializer && TREE_CODE (initializer) == CONSTRUCTOR)
4204 VEC(constructor_elt,gc) *v = CONSTRUCTOR_ELTS (initializer);
4205 constructor_elt *ce;
4208 VEC_iterate (constructor_elt, v, i, ce);
4210 if (!check_array_designated_initializer (ce))
4216 failure = cp_complete_array_type (&TREE_TYPE (decl), initializer,
4220 error ("initializer fails to determine size of %qD", decl);
4221 TREE_TYPE (decl) = error_mark_node;
4223 else if (failure == 2)
4227 error ("array size missing in %qD", decl);
4228 TREE_TYPE (decl) = error_mark_node;
4230 /* If a `static' var's size isn't known, make it extern as
4231 well as static, so it does not get allocated. If it's not
4232 `static', then don't mark it extern; finish_incomplete_decl
4233 will give it a default size and it will get allocated. */
4234 else if (!pedantic && TREE_STATIC (decl) && !TREE_PUBLIC (decl))
4235 DECL_EXTERNAL (decl) = 1;
4237 else if (failure == 3)
4239 error ("zero-size array %qD", decl);
4240 TREE_TYPE (decl) = error_mark_node;
4244 cp_apply_type_quals_to_decl (cp_type_quals (TREE_TYPE (decl)), decl);
4246 layout_decl (decl, 0);
4250 /* Set DECL_SIZE, DECL_ALIGN, etc. for DECL (a VAR_DECL), and issue
4251 any appropriate error messages regarding the layout. */
4254 layout_var_decl (tree decl)
4258 type = TREE_TYPE (decl);
4259 if (type == error_mark_node)
4262 /* If we haven't already layed out this declaration, do so now.
4263 Note that we must not call complete type for an external object
4264 because it's type might involve templates that we are not
4265 supposed to instantiate yet. (And it's perfectly valid to say
4266 `extern X x' for some incomplete type `X'.) */
4267 if (!DECL_EXTERNAL (decl))
4268 complete_type (type);
4269 if (!DECL_SIZE (decl)
4270 && TREE_TYPE (decl) != error_mark_node
4271 && (COMPLETE_TYPE_P (type)
4272 || (TREE_CODE (type) == ARRAY_TYPE
4273 && !TYPE_DOMAIN (type)
4274 && COMPLETE_TYPE_P (TREE_TYPE (type)))))
4275 layout_decl (decl, 0);
4277 if (!DECL_EXTERNAL (decl) && DECL_SIZE (decl) == NULL_TREE)
4279 /* An automatic variable with an incomplete type: that is an error.
4280 Don't talk about array types here, since we took care of that
4281 message in grokdeclarator. */
4282 error ("storage size of %qD isn't known", decl);
4283 TREE_TYPE (decl) = error_mark_node;
4286 /* Keep this code around in case we later want to control debug info
4287 based on whether a type is "used". (jason 1999-11-11) */
4289 else if (!DECL_EXTERNAL (decl) && IS_AGGR_TYPE (ttype))
4290 /* Let debugger know it should output info for this type. */
4291 note_debug_info_needed (ttype);
4293 if (TREE_STATIC (decl) && DECL_CLASS_SCOPE_P (decl))
4294 note_debug_info_needed (DECL_CONTEXT (decl));
4297 if ((DECL_EXTERNAL (decl) || TREE_STATIC (decl))
4298 && DECL_SIZE (decl) != NULL_TREE
4299 && ! TREE_CONSTANT (DECL_SIZE (decl)))
4301 if (TREE_CODE (DECL_SIZE (decl)) == INTEGER_CST)
4302 constant_expression_warning (DECL_SIZE (decl));
4304 error ("storage size of %qD isn't constant", decl);
4308 /* If a local static variable is declared in an inline function, or if
4309 we have a weak definition, we must endeavor to create only one
4310 instance of the variable at link-time. */
4313 maybe_commonize_var (tree decl)
4315 /* Static data in a function with comdat linkage also has comdat
4317 if (TREE_STATIC (decl)
4318 /* Don't mess with __FUNCTION__. */
4319 && ! DECL_ARTIFICIAL (decl)
4320 && DECL_FUNCTION_SCOPE_P (decl)
4321 /* Unfortunately, import_export_decl has not always been called
4322 before the function is processed, so we cannot simply check
4324 && (DECL_COMDAT (DECL_CONTEXT (decl))
4325 || ((DECL_DECLARED_INLINE_P (DECL_CONTEXT (decl))
4326 || DECL_TEMPLATE_INSTANTIATION (DECL_CONTEXT (decl)))
4327 && TREE_PUBLIC (DECL_CONTEXT (decl)))))
4331 /* With weak symbols, we simply make the variable COMDAT;
4332 that will cause copies in multiple translations units to
4334 comdat_linkage (decl);
4338 if (DECL_INITIAL (decl) == NULL_TREE
4339 || DECL_INITIAL (decl) == error_mark_node)
4341 /* Without weak symbols, we can use COMMON to merge
4342 uninitialized variables. */
4343 TREE_PUBLIC (decl) = 1;
4344 DECL_COMMON (decl) = 1;
4348 /* While for initialized variables, we must use internal
4349 linkage -- which means that multiple copies will not
4351 TREE_PUBLIC (decl) = 0;
4352 DECL_COMMON (decl) = 0;
4353 warning (0, "sorry: semantics of inline function static "
4354 "data %q+#D are wrong (you'll wind up "
4355 "with multiple copies)", decl);
4356 warning (0, "%J you can work around this by removing "
4362 else if (DECL_LANG_SPECIFIC (decl) && DECL_COMDAT (decl))
4363 /* Set it up again; we might have set DECL_INITIAL since the last
4365 comdat_linkage (decl);
4368 /* Issue an error message if DECL is an uninitialized const variable. */
4371 check_for_uninitialized_const_var (tree decl)
4373 tree type = TREE_TYPE (decl);
4375 /* ``Unless explicitly declared extern, a const object does not have
4376 external linkage and must be initialized. ($8.4; $12.1)'' ARM
4378 if (TREE_CODE (decl) == VAR_DECL
4379 && TREE_CODE (type) != REFERENCE_TYPE
4380 && CP_TYPE_CONST_P (type)
4381 && !TYPE_NEEDS_CONSTRUCTING (type)
4382 && !DECL_INITIAL (decl))
4383 error ("uninitialized const %qD", decl);
4387 /* Structure holding the current initializer being processed by reshape_init.
4388 CUR is a pointer to the current element being processed, END is a pointer
4389 after the last element present in the initializer. */
4390 typedef struct reshape_iterator_t
4392 constructor_elt *cur;
4393 constructor_elt *end;
4396 static tree reshape_init_r (tree, reshape_iter *, bool);
4398 /* FIELD is a FIELD_DECL or NULL. In the former case, the value
4399 returned is the next FIELD_DECL (possibly FIELD itself) that can be
4400 initialized. If there are no more such fields, the return value
4404 next_initializable_field (tree field)
4407 && (TREE_CODE (field) != FIELD_DECL
4408 || (DECL_C_BIT_FIELD (field) && !DECL_NAME (field))
4409 || DECL_ARTIFICIAL (field)))
4410 field = TREE_CHAIN (field);
4415 /* Subroutine of reshape_init_array and reshape_init_vector, which does
4416 the actual work. ELT_TYPE is the element type of the array. MAX_INDEX is an
4417 INTEGER_CST representing the size of the array minus one (the maximum index),
4418 or NULL_TREE if the array was declared without specifying the size. D is
4419 the iterator within the constructor. */
4422 reshape_init_array_1 (tree elt_type, tree max_index, reshape_iter *d)
4425 bool sized_array_p = (max_index != NULL_TREE);
4426 unsigned HOST_WIDE_INT max_index_cst = 0;
4427 unsigned HOST_WIDE_INT index;
4429 /* The initializer for an array is always a CONSTRUCTOR. */
4430 new_init = build_constructor (NULL_TREE, NULL);
4434 /* Minus 1 is used for zero sized arrays. */
4435 if (integer_all_onesp (max_index))
4438 if (host_integerp (max_index, 1))
4439 max_index_cst = tree_low_cst (max_index, 1);
4440 /* sizetype is sign extended, not zero extended. */
4442 max_index_cst = tree_low_cst (fold_convert (size_type_node, max_index),
4446 /* Loop until there are no more initializers. */
4448 d->cur != d->end && (!sized_array_p || index <= max_index_cst);
4453 check_array_designated_initializer (d->cur);
4454 elt_init = reshape_init_r (elt_type, d, /*first_initializer_p=*/false);
4455 if (elt_init == error_mark_node)
4456 return error_mark_node;
4457 CONSTRUCTOR_APPEND_ELT (CONSTRUCTOR_ELTS (new_init), NULL_TREE, elt_init);
4463 /* Subroutine of reshape_init_r, processes the initializers for arrays.
4464 Parameters are the same of reshape_init_r. */
4467 reshape_init_array (tree type, reshape_iter *d)
4469 tree max_index = NULL_TREE;
4471 gcc_assert (TREE_CODE (type) == ARRAY_TYPE);
4473 if (TYPE_DOMAIN (type))
4474 max_index = array_type_nelts (type);
4476 return reshape_init_array_1 (TREE_TYPE (type), max_index, d);
4479 /* Subroutine of reshape_init_r, processes the initializers for vectors.
4480 Parameters are the same of reshape_init_r. */
4483 reshape_init_vector (tree type, reshape_iter *d)
4485 tree max_index = NULL_TREE;
4488 gcc_assert (TREE_CODE (type) == VECTOR_TYPE);
4490 if (COMPOUND_LITERAL_P (d->cur->value))
4492 tree value = d->cur->value;
4493 if (!same_type_p (TREE_TYPE (value), type))
4495 error ("invalid type %qT as initializer for a vector of type %qT",
4496 TREE_TYPE (d->cur->value), type);
4497 value = error_mark_node;
4503 /* For a vector, the representation type is a struct
4504 containing a single member which is an array of the
4505 appropriate size. */
4506 rtype = TYPE_DEBUG_REPRESENTATION_TYPE (type);
4507 if (rtype && TYPE_DOMAIN (TREE_TYPE (TYPE_FIELDS (rtype))))
4508 max_index = array_type_nelts (TREE_TYPE (TYPE_FIELDS (rtype)));
4510 return reshape_init_array_1 (TREE_TYPE (type), max_index, d);
4513 /* Subroutine of reshape_init_r, processes the initializers for classes
4514 or union. Parameters are the same of reshape_init_r. */
4517 reshape_init_class (tree type, reshape_iter *d, bool first_initializer_p)
4522 gcc_assert (CLASS_TYPE_P (type));
4524 /* The initializer for a class is always a CONSTRUCTOR. */
4525 new_init = build_constructor (NULL_TREE, NULL);
4526 field = next_initializable_field (TYPE_FIELDS (type));
4532 An initializer for an aggregate member that is an
4533 empty class shall have the form of an empty
4534 initializer-list {}. */
4535 if (!first_initializer_p)
4537 error ("initializer for %qT must be brace-enclosed", type);
4538 return error_mark_node;
4543 /* Loop through the initializable fields, gathering initializers. */
4544 while (d->cur != d->end)
4548 /* Handle designated initializers, as an extension. */
4551 field = lookup_field_1 (type, d->cur->index, /*want_type=*/false);
4553 if (!field || TREE_CODE (field) != FIELD_DECL)
4555 error ("%qT has no non-static data member named %qD", type,
4557 return error_mark_node;
4561 /* If we processed all the member of the class, we are done. */
4565 field_init = reshape_init_r (TREE_TYPE (field), d,
4566 /*first_initializer_p=*/false);
4567 CONSTRUCTOR_APPEND_ELT (CONSTRUCTOR_ELTS (new_init), field, field_init);
4571 When a union is initialized with a brace-enclosed
4572 initializer, the braces shall only contain an
4573 initializer for the first member of the union. */
4574 if (TREE_CODE (type) == UNION_TYPE)
4577 field = next_initializable_field (TREE_CHAIN (field));
4583 /* Subroutine of reshape_init, which processes a single initializer (part of
4584 a CONSTRUCTOR). TYPE is the type of the variable being initialized, D is the
4585 iterator within the CONSTRUCTOR which points to the initializer to process.
4586 FIRST_INITIALIZER_P is true if this is the first initializer of the
4587 CONSTRUCTOR node. */
4590 reshape_init_r (tree type, reshape_iter *d, bool first_initializer_p)
4592 tree init = d->cur->value;
4594 /* A non-aggregate type is always initialized with a single
4596 if (!CP_AGGREGATE_TYPE_P (type))
4598 /* It is invalid to initialize a non-aggregate type with a
4599 brace-enclosed initializer.
4600 We need to check for BRACE_ENCLOSED_INITIALIZER_P here because
4601 of g++.old-deja/g++.mike/p7626.C: a pointer-to-member constant is
4602 a CONSTRUCTOR (with a record type). */
4603 if (TREE_CODE (init) == CONSTRUCTOR
4604 && BRACE_ENCLOSED_INITIALIZER_P (init)) /* p7626.C */
4606 error ("braces around scalar initializer for type %qT", type);
4607 init = error_mark_node;
4616 All implicit type conversions (clause _conv_) are considered when
4617 initializing the aggregate member with an initializer from an
4618 initializer-list. If the initializer can initialize a member,
4619 the member is initialized. Otherwise, if the member is itself a
4620 non-empty subaggregate, brace elision is assumed and the
4621 initializer is considered for the initialization of the first
4622 member of the subaggregate. */
4623 if (TREE_CODE (init) != CONSTRUCTOR
4624 && can_convert_arg (type, TREE_TYPE (init), init, LOOKUP_NORMAL))
4630 /* [dcl.init.string]
4632 A char array (whether plain char, signed char, or unsigned char)
4633 can be initialized by a string-literal (optionally enclosed in
4634 braces); a wchar_t array can be initialized by a wide
4635 string-literal (optionally enclosed in braces). */
4636 if (TREE_CODE (type) == ARRAY_TYPE
4637 && char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (type))))
4639 tree str_init = init;
4641 /* Strip one level of braces if and only if they enclose a single
4642 element (as allowed by [dcl.init.string]). */
4643 if (!first_initializer_p
4644 && TREE_CODE (str_init) == CONSTRUCTOR
4645 && VEC_length (constructor_elt, CONSTRUCTOR_ELTS (str_init)) == 1)
4647 str_init = VEC_index (constructor_elt,
4648 CONSTRUCTOR_ELTS (str_init), 0)->value;
4651 /* If it's a string literal, then it's the initializer for the array
4652 as a whole. Otherwise, continue with normal initialization for
4653 array types (one value per array element). */
4654 if (TREE_CODE (str_init) == STRING_CST)
4661 /* The following cases are about aggregates. If we are not within a full
4662 initializer already, and there is not a CONSTRUCTOR, it means that there
4663 is a missing set of braces (that is, we are processing the case for
4664 which reshape_init exists). */
4665 if (!first_initializer_p)
4667 if (TREE_CODE (init) == CONSTRUCTOR)
4669 if (TREE_TYPE (init) && TYPE_PTRMEMFUNC_P (TREE_TYPE (init)))
4670 /* There is no need to reshape pointer-to-member function
4671 initializers, as they are always constructed correctly
4672 by the front end. */
4674 else if (COMPOUND_LITERAL_P (init))
4675 /* For a nested compound literal, there is no need to reshape since
4676 brace elision is not allowed. Even if we decided to allow it,
4677 we should add a call to reshape_init in finish_compound_literal,
4678 before calling digest_init, so changing this code would still
4679 not be necessary. */
4680 gcc_assert (!BRACE_ENCLOSED_INITIALIZER_P (init));
4684 gcc_assert (BRACE_ENCLOSED_INITIALIZER_P (init));
4685 return reshape_init (type, init);
4689 warning (OPT_Wmissing_braces, "missing braces around initializer for %qT",
4693 /* Dispatch to specialized routines. */
4694 if (CLASS_TYPE_P (type))
4695 return reshape_init_class (type, d, first_initializer_p);
4696 else if (TREE_CODE (type) == ARRAY_TYPE)
4697 return reshape_init_array (type, d);
4698 else if (TREE_CODE (type) == VECTOR_TYPE)
4699 return reshape_init_vector (type, d);
4704 /* Undo the brace-elision allowed by [dcl.init.aggr] in a
4705 brace-enclosed aggregate initializer.
4707 INIT is the CONSTRUCTOR containing the list of initializers describing
4708 a brace-enclosed initializer for an entity of the indicated aggregate TYPE.
4709 It may not presently match the shape of the TYPE; for example:
4711 struct S { int a; int b; };
4712 struct S a[] = { 1, 2, 3, 4 };
4714 Here INIT will hold a VEC of four elements, rather than a
4715 VEC of two elements, each itself a VEC of two elements. This
4716 routine transforms INIT from the former form into the latter. The
4717 revised CONSTRUCTOR node is returned. */
4720 reshape_init (tree type, tree init)
4722 VEC(constructor_elt, gc) *v;
4726 gcc_assert (BRACE_ENCLOSED_INITIALIZER_P (init));
4728 v = CONSTRUCTOR_ELTS (init);
4730 /* An empty constructor does not need reshaping, and it is always a valid
4732 if (VEC_empty (constructor_elt, v))
4735 /* Recurse on this CONSTRUCTOR. */
4736 d.cur = VEC_index (constructor_elt, v, 0);
4737 d.end = d.cur + VEC_length (constructor_elt, v);
4739 new_init = reshape_init_r (type, &d, true);
4740 if (new_init == error_mark_node)
4741 return error_mark_node;
4743 /* Make sure all the element of the constructor were used. Otherwise,
4744 issue an error about exceeding initializers. */
4746 error ("too many initializers for %qT", type);
4751 /* Verify INIT (the initializer for DECL), and record the
4752 initialization in DECL_INITIAL, if appropriate. CLEANUP is as for
4753 grok_reference_init.
4755 If the return value is non-NULL, it is an expression that must be
4756 evaluated dynamically to initialize DECL. */
4759 check_initializer (tree decl, tree init, int flags, tree *cleanup)
4761 tree type = TREE_TYPE (decl);
4762 tree init_code = NULL;
4764 /* Things that are going to be initialized need to have complete
4766 TREE_TYPE (decl) = type = complete_type (TREE_TYPE (decl));
4768 if (type == error_mark_node)
4769 /* We will have already complained. */
4772 if (TREE_CODE (type) == ARRAY_TYPE)
4774 tree element_type = TREE_TYPE (type);
4776 /* The array type itself need not be complete, because the
4777 initializer may tell us how many elements are in the array.
4778 But, the elements of the array must be complete. */
4779 if (!COMPLETE_TYPE_P (complete_type (element_type)))
4781 error ("elements of array %q#D have incomplete type", decl);
4784 /* It is not valid to initialize an a VLA. */
4786 && ((COMPLETE_TYPE_P (type) && !TREE_CONSTANT (TYPE_SIZE (type)))
4787 || !TREE_CONSTANT (TYPE_SIZE (element_type))))
4789 error ("variable-sized object %qD may not be initialized", decl);
4793 else if (!COMPLETE_TYPE_P (type))
4795 error ("%qD has incomplete type", decl);
4796 TREE_TYPE (decl) = error_mark_node;
4800 /* There is no way to make a variable-sized class type in GNU C++. */
4801 gcc_assert (TREE_CONSTANT (TYPE_SIZE (type)));
4803 if (!CP_AGGREGATE_TYPE_P (type)
4804 && init && BRACE_ENCLOSED_INITIALIZER_P (init)
4805 && VEC_length (constructor_elt, CONSTRUCTOR_ELTS (init)) != 1)
4807 error ("scalar object %qD requires one element in initializer", decl);
4808 TREE_TYPE (decl) = error_mark_node;
4812 if (TREE_CODE (decl) == CONST_DECL)
4814 gcc_assert (TREE_CODE (type) != REFERENCE_TYPE);
4816 DECL_INITIAL (decl) = init;
4818 gcc_assert (init != NULL_TREE);
4821 else if (!DECL_EXTERNAL (decl) && TREE_CODE (type) == REFERENCE_TYPE)
4822 init = grok_reference_init (decl, type, init, cleanup);
4825 /* Do not reshape constructors of vectors (they don't need to be
4827 if (TREE_CODE (init) == CONSTRUCTOR
4828 && !COMPOUND_LITERAL_P (init)
4829 && !TREE_TYPE (init)) /* ptrmemfunc */
4831 init = reshape_init (type, init);
4833 if ((*targetm.vector_opaque_p) (type))
4835 error ("opaque vector types cannot be initialized");
4836 init = error_mark_node;
4840 /* If DECL has an array type without a specific bound, deduce the
4841 array size from the initializer. */
4842 maybe_deduce_size_from_array_init (decl, init);
4843 type = TREE_TYPE (decl);
4844 if (type == error_mark_node)
4847 if (TYPE_HAS_CONSTRUCTOR (type) || TYPE_NEEDS_CONSTRUCTING (type))
4849 if (TREE_CODE (type) == ARRAY_TYPE)
4850 goto initialize_aggr;
4851 else if (TREE_CODE (init) == CONSTRUCTOR)
4853 if (TYPE_NON_AGGREGATE_CLASS (type))
4855 error ("%qD must be initialized by constructor, "
4858 init = error_mark_node;
4861 goto dont_use_constructor;
4865 int saved_stmts_are_full_exprs_p;
4868 saved_stmts_are_full_exprs_p = 0;
4869 if (building_stmt_tree ())
4871 saved_stmts_are_full_exprs_p = stmts_are_full_exprs_p ();
4872 current_stmt_tree ()->stmts_are_full_exprs_p = 1;
4874 init = build_aggr_init (decl, init, flags);
4875 if (building_stmt_tree ())
4876 current_stmt_tree ()->stmts_are_full_exprs_p =
4877 saved_stmts_are_full_exprs_p;
4883 dont_use_constructor:
4884 if (TREE_CODE (init) != TREE_VEC)
4886 init_code = store_init_value (decl, init);
4887 if (pedantic && TREE_CODE (type) == ARRAY_TYPE
4888 && DECL_INITIAL (decl)
4889 && TREE_CODE (DECL_INITIAL (decl)) == STRING_CST
4890 && PAREN_STRING_LITERAL_P (DECL_INITIAL (decl)))
4891 warning (0, "array %qD initialized by parenthesized string literal %qE",
4892 decl, DECL_INITIAL (decl));
4897 else if (DECL_EXTERNAL (decl))
4899 else if (TYPE_P (type) && TYPE_NEEDS_CONSTRUCTING (type))
4900 goto initialize_aggr;
4901 else if (IS_AGGR_TYPE (type))
4903 tree core_type = strip_array_types (type);
4905 if (CLASSTYPE_READONLY_FIELDS_NEED_INIT (core_type))
4906 error ("structure %qD with uninitialized const members", decl);
4907 if (CLASSTYPE_REF_FIELDS_NEED_INIT (core_type))
4908 error ("structure %qD with uninitialized reference members", decl);
4910 check_for_uninitialized_const_var (decl);
4913 check_for_uninitialized_const_var (decl);
4915 if (init && init != error_mark_node)
4916 init_code = build2 (INIT_EXPR, type, decl, init);
4921 /* If DECL is not a local variable, give it RTL. */
4924 make_rtl_for_nonlocal_decl (tree decl, tree init, const char* asmspec)
4926 int toplev = toplevel_bindings_p ();
4928 const char *filename;
4930 /* Set the DECL_ASSEMBLER_NAME for the object. */
4933 /* The `register' keyword, when used together with an
4934 asm-specification, indicates that the variable should be
4935 placed in a particular register. */
4936 if (TREE_CODE (decl) == VAR_DECL && DECL_REGISTER (decl))
4938 set_user_assembler_name (decl, asmspec);
4939 DECL_HARD_REGISTER (decl) = 1;
4943 if (TREE_CODE (decl) == FUNCTION_DECL
4944 && DECL_BUILT_IN_CLASS (decl) == BUILT_IN_NORMAL)
4945 set_builtin_user_assembler_name (decl, asmspec);
4946 set_user_assembler_name (decl, asmspec);
4950 /* Handle non-variables up front. */
4951 if (TREE_CODE (decl) != VAR_DECL)
4953 rest_of_decl_compilation (decl, toplev, at_eof);
4957 /* If we see a class member here, it should be a static data
4959 if (DECL_LANG_SPECIFIC (decl) && DECL_IN_AGGR_P (decl))
4961 gcc_assert (TREE_STATIC (decl));
4962 /* An in-class declaration of a static data member should be
4963 external; it is only a declaration, and not a definition. */
4964 if (init == NULL_TREE)
4965 gcc_assert (DECL_EXTERNAL (decl) || !TREE_PUBLIC (decl));
4968 /* We don't create any RTL for local variables. */
4969 if (DECL_FUNCTION_SCOPE_P (decl) && !TREE_STATIC (decl))
4972 /* We defer emission of local statics until the corresponding
4973 DECL_EXPR is expanded. */
4974 defer_p = DECL_FUNCTION_SCOPE_P (decl) || DECL_VIRTUAL_P (decl);
4976 /* We try to defer namespace-scope static constants so that they are
4977 not emitted into the object file unnecessarily. */
4978 filename = input_filename;
4979 if (!DECL_VIRTUAL_P (decl)
4980 && TREE_READONLY (decl)
4981 && DECL_INITIAL (decl) != NULL_TREE
4982 && DECL_INITIAL (decl) != error_mark_node
4984 && ! EMPTY_CONSTRUCTOR_P (DECL_INITIAL (decl))
4986 && !TREE_PUBLIC (decl))
4988 /* Fool with the linkage of static consts according to #pragma
4990 struct c_fileinfo *finfo = get_fileinfo (filename);
4991 if (!finfo->interface_unknown && !TREE_PUBLIC (decl))
4993 TREE_PUBLIC (decl) = 1;
4994 DECL_EXTERNAL (decl) = finfo->interface_only;
4999 /* Likewise for template instantiations. */
5000 else if (DECL_LANG_SPECIFIC (decl)
5001 && DECL_IMPLICIT_INSTANTIATION (decl))
5004 /* If we're not deferring, go ahead and assemble the variable. */
5006 rest_of_decl_compilation (decl, toplev, at_eof);
5009 /* Generate code to initialize DECL (a local variable). */
5012 initialize_local_var (tree decl, tree init)
5014 tree type = TREE_TYPE (decl);
5017 gcc_assert (TREE_CODE (decl) == VAR_DECL
5018 || TREE_CODE (decl) == RESULT_DECL);
5019 gcc_assert (!TREE_STATIC (decl));
5021 if (DECL_SIZE (decl) == NULL_TREE)
5023 /* If we used it already as memory, it must stay in memory. */
5024 DECL_INITIAL (decl) = NULL_TREE;
5025 TREE_ADDRESSABLE (decl) = TREE_USED (decl);
5028 if (DECL_SIZE (decl) && type != error_mark_node)
5032 /* Compute and store the initial value. */
5033 already_used = TREE_USED (decl) || TREE_USED (type);
5035 /* Perform the initialization. */
5038 int saved_stmts_are_full_exprs_p;
5040 gcc_assert (building_stmt_tree ());
5041 saved_stmts_are_full_exprs_p = stmts_are_full_exprs_p ();
5042 current_stmt_tree ()->stmts_are_full_exprs_p = 1;
5043 finish_expr_stmt (init);
5044 current_stmt_tree ()->stmts_are_full_exprs_p =
5045 saved_stmts_are_full_exprs_p;
5048 /* Set this to 0 so we can tell whether an aggregate which was
5049 initialized was ever used. Don't do this if it has a
5050 destructor, so we don't complain about the 'resource
5051 allocation is initialization' idiom. Now set
5052 attribute((unused)) on types so decls of that type will be
5053 marked used. (see TREE_USED, above.) */
5054 if (TYPE_NEEDS_CONSTRUCTING (type)
5056 && TYPE_HAS_TRIVIAL_DESTRUCTOR (type)
5057 && DECL_NAME (decl))
5058 TREE_USED (decl) = 0;
5059 else if (already_used)
5060 TREE_USED (decl) = 1;
5063 /* Generate a cleanup, if necessary. */
5064 cleanup = cxx_maybe_build_cleanup (decl);
5065 if (DECL_SIZE (decl) && cleanup)
5066 finish_decl_cleanup (decl, cleanup);
5069 /* DECL is a VAR_DECL for a compiler-generated variable with static
5070 storage duration (like a virtual table) whose initializer is a
5071 compile-time constant. INIT must be either a TREE_LIST of values,
5072 or a CONSTRUCTOR. Initialize the variable and provide it to the
5076 initialize_artificial_var (tree decl, tree init)
5078 gcc_assert (DECL_ARTIFICIAL (decl));
5079 if (TREE_CODE (init) == TREE_LIST)
5080 init = build_constructor_from_list (NULL_TREE, init);
5081 gcc_assert (TREE_CODE (init) == CONSTRUCTOR);
5082 DECL_INITIAL (decl) = init;
5083 DECL_INITIALIZED_P (decl) = 1;
5084 determine_visibility (decl);
5085 layout_var_decl (decl);
5086 maybe_commonize_var (decl);
5087 make_rtl_for_nonlocal_decl (decl, init, /*asmspec=*/NULL);
5090 /* INIT is the initializer for a variable, as represented by the
5091 parser. Returns true iff INIT is value-dependent. */
5094 value_dependent_init_p (tree init)
5096 if (TREE_CODE (init) == TREE_LIST)
5097 /* A parenthesized initializer, e.g.: int i (3, 2); ? */
5098 return any_value_dependent_elements_p (init);
5099 else if (TREE_CODE (init) == CONSTRUCTOR)
5100 /* A brace-enclosed initializer, e.g.: int i = { 3 }; ? */
5102 VEC(constructor_elt, gc) *elts;
5106 elts = CONSTRUCTOR_ELTS (init);
5107 nelts = VEC_length (constructor_elt, elts);
5108 for (i = 0; i < nelts; ++i)
5109 if (value_dependent_init_p (VEC_index (constructor_elt,
5114 /* It must be a simple expression, e.g., int i = 3; */
5115 return value_dependent_expression_p (init);
5120 /* Finish processing of a declaration;
5121 install its line number and initial value.
5122 If the length of an array type is not known before,
5123 it must be determined now, from the initial value, or it is an error.
5125 INIT is the initializer (if any) for DECL. If INIT_CONST_EXPR_P is
5126 true, then INIT is an integral constant expression.
5128 FLAGS is LOOKUP_ONLYCONVERTING if the = init syntax was used, else 0
5129 if the (init) syntax was used. */
5132 cp_finish_decl (tree decl, tree init, bool init_const_expr_p,
5133 tree asmspec_tree, int flags)
5137 const char *asmspec = NULL;
5138 int was_readonly = 0;
5139 bool var_definition_p = false;
5140 int saved_processing_template_decl;
5142 if (decl == error_mark_node)
5147 error ("assignment (not initialization) in declaration");
5151 gcc_assert (TREE_CODE (decl) != RESULT_DECL);
5152 /* Parameters are handled by store_parm_decls, not cp_finish_decl. */
5153 gcc_assert (TREE_CODE (decl) != PARM_DECL);
5155 type = TREE_TYPE (decl);
5156 if (type == error_mark_node)
5159 /* Assume no cleanup is required. */
5160 cleanup = NULL_TREE;
5161 saved_processing_template_decl = processing_template_decl;
5163 /* If a name was specified, get the string. */
5164 if (global_scope_p (current_binding_level))
5165 asmspec_tree = maybe_apply_renaming_pragma (decl, asmspec_tree);
5166 if (asmspec_tree && asmspec_tree != error_mark_node)
5167 asmspec = TREE_STRING_POINTER (asmspec_tree);
5169 if (current_class_type
5170 && CP_DECL_CONTEXT (decl) == current_class_type
5171 && TYPE_BEING_DEFINED (current_class_type)
5172 && (DECL_INITIAL (decl) || init))
5173 DECL_INITIALIZED_IN_CLASS_P (decl) = 1;
5175 if (processing_template_decl)
5177 bool type_dependent_p;
5179 /* Add this declaration to the statement-tree. */
5180 if (at_function_scope_p ())
5181 add_decl_expr (decl);
5183 type_dependent_p = dependent_type_p (type);
5185 if (init && init_const_expr_p)
5187 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (decl) = 1;
5188 if (DECL_INTEGRAL_CONSTANT_VAR_P (decl))
5189 TREE_CONSTANT (decl) = 1;
5192 /* Generally, initializers in templates are expanded when the
5193 template is instantiated. But, if DECL is an integral
5194 constant static data member, then it can be used in future
5195 integral constant expressions, and its value must be
5198 && DECL_CLASS_SCOPE_P (decl)
5199 && DECL_INTEGRAL_CONSTANT_VAR_P (decl)
5200 && !type_dependent_p
5201 && !value_dependent_init_p (init)))
5204 DECL_INITIAL (decl) = init;
5205 if (TREE_CODE (decl) == VAR_DECL
5206 && !DECL_PRETTY_FUNCTION_P (decl)
5207 && !type_dependent_p)
5208 maybe_deduce_size_from_array_init (decl, init);
5212 init = fold_non_dependent_expr (init);
5213 processing_template_decl = 0;
5216 /* Take care of TYPE_DECLs up front. */
5217 if (TREE_CODE (decl) == TYPE_DECL)
5219 if (type != error_mark_node
5220 && IS_AGGR_TYPE (type) && DECL_NAME (decl))
5222 if (TREE_TYPE (DECL_NAME (decl)) && TREE_TYPE (decl) != type)
5223 warning (0, "shadowing previous type declaration of %q#D", decl);
5224 set_identifier_type_value (DECL_NAME (decl), decl);
5227 /* If we have installed this as the canonical typedef for this
5228 type, and that type has not been defined yet, delay emitting
5229 the debug information for it, as we will emit it later. */
5230 if (TYPE_MAIN_DECL (TREE_TYPE (decl)) == decl
5231 && !COMPLETE_TYPE_P (TREE_TYPE (decl)))
5232 TYPE_DECL_SUPPRESS_DEBUG (decl) = 1;
5234 rest_of_decl_compilation (decl, DECL_CONTEXT (decl) == NULL_TREE,
5239 /* A reference will be modified here, as it is initialized. */
5240 if (! DECL_EXTERNAL (decl)
5241 && TREE_READONLY (decl)
5242 && TREE_CODE (type) == REFERENCE_TYPE)
5245 TREE_READONLY (decl) = 0;
5248 if (TREE_CODE (decl) == VAR_DECL)
5250 /* Only PODs can have thread-local storage. Other types may require
5251 various kinds of non-trivial initialization. */
5252 if (DECL_THREAD_LOCAL_P (decl) && !pod_type_p (TREE_TYPE (decl)))
5253 error ("%qD cannot be thread-local because it has non-POD type %qT",
5254 decl, TREE_TYPE (decl));
5255 /* If this is a local variable that will need a mangled name,
5256 register it now. We must do this before processing the
5257 initializer for the variable, since the initialization might
5258 require a guard variable, and since the mangled name of the
5259 guard variable will depend on the mangled name of this
5261 if (!processing_template_decl
5262 && DECL_FUNCTION_SCOPE_P (decl)
5263 && TREE_STATIC (decl)
5264 && !DECL_ARTIFICIAL (decl))
5265 push_local_name (decl);
5266 /* Convert the initializer to the type of DECL, if we have not
5267 already initialized DECL. */
5268 if (!DECL_INITIALIZED_P (decl)
5269 /* If !DECL_EXTERNAL then DECL is being defined. In the
5270 case of a static data member initialized inside the
5271 class-specifier, there can be an initializer even if DECL
5272 is *not* defined. */
5273 && (!DECL_EXTERNAL (decl) || init))
5277 DECL_NONTRIVIALLY_INITIALIZED_P (decl) = 1;
5278 if (init_const_expr_p)
5280 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (decl) = 1;
5281 if (DECL_INTEGRAL_CONSTANT_VAR_P (decl))
5282 TREE_CONSTANT (decl) = 1;
5285 init = check_initializer (decl, init, flags, &cleanup);
5286 /* Thread-local storage cannot be dynamically initialized. */
5287 if (DECL_THREAD_LOCAL_P (decl) && init)
5289 error ("%qD is thread-local and so cannot be dynamically "
5290 "initialized", decl);
5294 /* Check that the initializer for a static data member was a
5295 constant. Although we check in the parser that the
5296 initializer is an integral constant expression, we do not
5297 simplify division-by-zero at the point at which it
5298 occurs. Therefore, in:
5300 struct S { static const int i = 7 / 0; };
5302 we issue an error at this point. It would
5303 probably be better to forbid division by zero in
5304 integral constant expressions. */
5305 if (DECL_EXTERNAL (decl) && init)
5307 error ("%qD cannot be initialized by a non-constant expression"
5308 " when being declared", decl);
5309 DECL_INITIALIZED_IN_CLASS_P (decl) = 0;
5317 The memory occupied by any object of static storage
5318 duration is zero-initialized at program startup before
5319 any other initialization takes place.
5321 We cannot create an appropriate initializer until after
5322 the type of DECL is finalized. If DECL_INITIAL is set,
5323 then the DECL is statically initialized, and any
5324 necessary zero-initialization has already been performed. */
5325 if (TREE_STATIC (decl) && !DECL_INITIAL (decl))
5326 DECL_INITIAL (decl) = build_zero_init (TREE_TYPE (decl),
5327 /*nelts=*/NULL_TREE,
5328 /*static_storage_p=*/true);
5329 /* Remember that the initialization for this variable has
5331 DECL_INITIALIZED_P (decl) = 1;
5332 /* This declaration is the definition of this variable,
5333 unless we are initializing a static data member within
5334 the class specifier. */
5335 if (!DECL_EXTERNAL (decl))
5336 var_definition_p = true;
5338 /* If the variable has an array type, lay out the type, even if
5339 there is no initializer. It is valid to index through the
5340 array, and we must get TYPE_ALIGN set correctly on the array
5342 else if (TREE_CODE (type) == ARRAY_TYPE)
5346 /* Add this declaration to the statement-tree. This needs to happen
5347 after the call to check_initializer so that the DECL_EXPR for a
5348 reference temp is added before the DECL_EXPR for the reference itself. */
5349 if (at_function_scope_p ())
5350 add_decl_expr (decl);
5352 /* Let the middle end know about variables and functions -- but not
5353 static data members in uninstantiated class templates. */
5354 if (!saved_processing_template_decl
5355 && (TREE_CODE (decl) == VAR_DECL
5356 || TREE_CODE (decl) == FUNCTION_DECL))
5358 if (TREE_CODE (decl) == VAR_DECL)
5360 layout_var_decl (decl);
5361 maybe_commonize_var (decl);
5364 make_rtl_for_nonlocal_decl (decl, init, asmspec);
5366 /* Check for abstractness of the type. Notice that there is no
5367 need to strip array types here since the check for those types
5368 is already done within create_array_type_for_decl. */
5369 if (TREE_CODE (type) == FUNCTION_TYPE
5370 || TREE_CODE (type) == METHOD_TYPE)
5371 abstract_virtuals_error (decl, TREE_TYPE (type));
5373 abstract_virtuals_error (decl, type);
5375 /* This needs to happen after the linkage is set. */
5376 determine_visibility (decl);
5378 if (TREE_CODE (decl) == FUNCTION_DECL
5379 || TREE_TYPE (decl) == error_mark_node)
5380 /* No initialization required. */
5382 else if (DECL_EXTERNAL (decl)
5383 && ! (DECL_LANG_SPECIFIC (decl)
5384 && DECL_NOT_REALLY_EXTERN (decl)))
5387 DECL_INITIAL (decl) = init;
5391 /* A variable definition. */
5392 if (DECL_FUNCTION_SCOPE_P (decl))
5394 /* Initialize the local variable. */
5395 if (processing_template_decl)
5396 DECL_INITIAL (decl) = init;
5397 else if (!TREE_STATIC (decl))
5398 initialize_local_var (decl, init);
5401 /* If a variable is defined, and then a subsequent
5402 definition with external linkage is encountered, we will
5403 get here twice for the same variable. We want to avoid
5404 calling expand_static_init more than once. For variables
5405 that are not static data members, we can call
5406 expand_static_init only when we actually process the
5407 initializer. It is not legal to redeclare a static data
5408 member, so this issue does not arise in that case. */
5409 if (var_definition_p && TREE_STATIC (decl))
5411 /* If a TREE_READONLY variable needs initialization
5412 at runtime, it is no longer readonly and we need to
5413 avoid MEM_READONLY_P being set on RTL created for it. */
5416 if (TREE_READONLY (decl))
5417 TREE_READONLY (decl) = 0;
5420 expand_static_init (decl, init);
5425 /* If a CLEANUP_STMT was created to destroy a temporary bound to a
5426 reference, insert it in the statement-tree now. */
5428 push_cleanup (decl, cleanup, false);
5431 processing_template_decl = saved_processing_template_decl;
5434 TREE_READONLY (decl) = 1;
5436 /* If this was marked 'used', be sure it will be output. */
5437 if (lookup_attribute ("used", DECL_ATTRIBUTES (decl)))
5438 mark_decl_referenced (decl);
5441 /* This is here for a midend callback from c-common.c. */
5444 finish_decl (tree decl, tree init, tree asmspec_tree)
5446 cp_finish_decl (decl, init, /*init_const_expr_p=*/false, asmspec_tree, 0);
5449 /* Returns a declaration for a VAR_DECL as if:
5451 extern "C" TYPE NAME;
5453 had been seen. Used to create compiler-generated global
5457 declare_global_var (tree name, tree type)
5461 push_to_top_level ();
5462 decl = build_decl (VAR_DECL, name, type);
5463 TREE_PUBLIC (decl) = 1;
5464 DECL_EXTERNAL (decl) = 1;
5465 DECL_ARTIFICIAL (decl) = 1;
5466 /* If the user has explicitly declared this variable (perhaps
5467 because the code we are compiling is part of a low-level runtime
5468 library), then it is possible that our declaration will be merged
5469 with theirs by pushdecl. */
5470 decl = pushdecl (decl);
5471 finish_decl (decl, NULL_TREE, NULL_TREE);
5472 pop_from_top_level ();
5477 /* Returns a pointer to the `atexit' function. Note that if
5478 FLAG_USE_CXA_ATEXIT is nonzero, then this will actually be the new
5479 `__cxa_atexit' function specified in the IA64 C++ ABI. */
5482 get_atexit_node (void)
5489 bool use_aeabi_atexit;
5494 if (flag_use_cxa_atexit)
5496 /* The declaration for `__cxa_atexit' is:
5498 int __cxa_atexit (void (*)(void *), void *, void *)
5500 We build up the argument types and then then function type
5503 use_aeabi_atexit = targetm.cxx.use_aeabi_atexit ();
5504 /* First, build the pointer-to-function type for the first
5506 arg_types = tree_cons (NULL_TREE, ptr_type_node, void_list_node);
5507 fn_type = build_function_type (void_type_node, arg_types);
5508 fn_ptr_type = build_pointer_type (fn_type);
5509 /* Then, build the rest of the argument types. */
5510 arg_types = tree_cons (NULL_TREE, ptr_type_node, void_list_node);
5511 if (use_aeabi_atexit)
5513 arg_types = tree_cons (NULL_TREE, fn_ptr_type, arg_types);
5514 arg_types = tree_cons (NULL_TREE, ptr_type_node, arg_types);
5518 arg_types = tree_cons (NULL_TREE, ptr_type_node, arg_types);
5519 arg_types = tree_cons (NULL_TREE, fn_ptr_type, arg_types);
5521 /* And the final __cxa_atexit type. */
5522 fn_type = build_function_type (integer_type_node, arg_types);
5523 fn_ptr_type = build_pointer_type (fn_type);
5524 if (use_aeabi_atexit)
5525 name = "__aeabi_atexit";
5527 name = "__cxa_atexit";
5531 /* The declaration for `atexit' is:
5533 int atexit (void (*)());
5535 We build up the argument types and then then function type
5537 fn_type = build_function_type (void_type_node, void_list_node);
5538 fn_ptr_type = build_pointer_type (fn_type);
5539 arg_types = tree_cons (NULL_TREE, fn_ptr_type, void_list_node);
5540 /* Build the final atexit type. */
5541 fn_type = build_function_type (integer_type_node, arg_types);
5545 /* Now, build the function declaration. */
5546 push_lang_context (lang_name_c);
5547 atexit_fndecl = build_library_fn_ptr (name, fn_type);
5548 mark_used (atexit_fndecl);
5549 pop_lang_context ();
5550 atexit_node = decay_conversion (atexit_fndecl);
5555 /* Returns the __dso_handle VAR_DECL. */
5558 get_dso_handle_node (void)
5560 if (dso_handle_node)
5561 return dso_handle_node;
5563 /* Declare the variable. */
5564 dso_handle_node = declare_global_var (get_identifier ("__dso_handle"),
5567 return dso_handle_node;
5570 /* Begin a new function with internal linkage whose job will be simply
5571 to destroy some particular variable. */
5573 static GTY(()) int start_cleanup_cnt;
5576 start_cleanup_fn (void)
5583 push_to_top_level ();
5585 /* No need to mangle this. */
5586 push_lang_context (lang_name_c);
5588 /* Build the parameter-types. */
5589 parmtypes = void_list_node;
5590 /* Functions passed to __cxa_atexit take an additional parameter.
5591 We'll just ignore it. After we implement the new calling
5592 convention for destructors, we can eliminate the use of
5593 additional cleanup functions entirely in the -fnew-abi case. */
5594 if (flag_use_cxa_atexit)
5595 parmtypes = tree_cons (NULL_TREE, ptr_type_node, parmtypes);
5596 /* Build the function type itself. */
5597 fntype = build_function_type (void_type_node, parmtypes);
5598 /* Build the name of the function. */
5599 sprintf (name, "__tcf_%d", start_cleanup_cnt++);
5600 /* Build the function declaration. */
5601 fndecl = build_lang_decl (FUNCTION_DECL, get_identifier (name), fntype);
5602 /* It's a function with internal linkage, generated by the
5604 TREE_PUBLIC (fndecl) = 0;
5605 DECL_ARTIFICIAL (fndecl) = 1;
5606 /* Make the function `inline' so that it is only emitted if it is
5607 actually needed. It is unlikely that it will be inlined, since
5608 it is only called via a function pointer, but we avoid unnecessary
5609 emissions this way. */
5610 DECL_INLINE (fndecl) = 1;
5611 DECL_DECLARED_INLINE_P (fndecl) = 1;
5612 DECL_INTERFACE_KNOWN (fndecl) = 1;
5613 /* Build the parameter. */
5614 if (flag_use_cxa_atexit)
5618 parmdecl = cp_build_parm_decl (NULL_TREE, ptr_type_node);
5619 DECL_CONTEXT (parmdecl) = fndecl;
5620 TREE_USED (parmdecl) = 1;
5621 DECL_ARGUMENTS (fndecl) = parmdecl;
5625 start_preparsed_function (fndecl, NULL_TREE, SF_PRE_PARSED);
5627 pop_lang_context ();
5629 return current_function_decl;
5632 /* Finish the cleanup function begun by start_cleanup_fn. */
5635 end_cleanup_fn (void)
5637 expand_or_defer_fn (finish_function (0));
5639 pop_from_top_level ();
5642 /* Generate code to handle the destruction of DECL, an object with
5643 static storage duration. */
5646 register_dtor_fn (tree decl)
5653 if (TYPE_HAS_TRIVIAL_DESTRUCTOR (TREE_TYPE (decl)))
5654 return void_zero_node;
5656 /* Call build_cleanup before we enter the anonymous function so that
5657 any access checks will be done relative to the current scope,
5658 rather than the scope of the anonymous function. */
5659 build_cleanup (decl);
5661 /* Now start the function. */
5662 cleanup = start_cleanup_fn ();
5664 /* Now, recompute the cleanup. It may contain SAVE_EXPRs that refer
5665 to the original function, rather than the anonymous one. That
5666 will make the back-end think that nested functions are in use,
5667 which causes confusion. */
5669 push_deferring_access_checks (dk_no_check);
5670 fcall = build_cleanup (decl);
5671 pop_deferring_access_checks ();
5673 /* Create the body of the anonymous function. */
5674 compound_stmt = begin_compound_stmt (BCS_FN_BODY);
5675 finish_expr_stmt (fcall);
5676 finish_compound_stmt (compound_stmt);
5679 /* Call atexit with the cleanup function. */
5680 cxx_mark_addressable (cleanup);
5681 mark_used (cleanup);
5682 cleanup = build_unary_op (ADDR_EXPR, cleanup, 0);
5683 if (flag_use_cxa_atexit)
5685 args = tree_cons (NULL_TREE,
5686 build_unary_op (ADDR_EXPR, get_dso_handle_node (), 0),
5688 if (targetm.cxx.use_aeabi_atexit ())
5690 args = tree_cons (NULL_TREE, cleanup, args);
5691 args = tree_cons (NULL_TREE, null_pointer_node, args);
5695 args = tree_cons (NULL_TREE, null_pointer_node, args);
5696 args = tree_cons (NULL_TREE, cleanup, args);
5700 args = tree_cons (NULL_TREE, cleanup, NULL_TREE);
5701 return build_function_call (get_atexit_node (), args);
5704 /* DECL is a VAR_DECL with static storage duration. INIT, if present,
5705 is its initializer. Generate code to handle the construction
5706 and destruction of DECL. */
5709 expand_static_init (tree decl, tree init)
5711 gcc_assert (TREE_CODE (decl) == VAR_DECL);
5712 gcc_assert (TREE_STATIC (decl));
5714 /* Some variables require no initialization. */
5716 && !TYPE_NEEDS_CONSTRUCTING (TREE_TYPE (decl))
5717 && TYPE_HAS_TRIVIAL_DESTRUCTOR (TREE_TYPE (decl)))
5720 if (DECL_FUNCTION_SCOPE_P (decl))
5722 /* Emit code to perform this initialization but once. */
5723 tree if_stmt = NULL_TREE, inner_if_stmt = NULL_TREE;
5724 tree then_clause = NULL_TREE, inner_then_clause = NULL_TREE;
5725 tree guard, guard_addr, guard_addr_list;
5726 tree acquire_fn, release_fn, abort_fn;
5729 /* Emit code to perform this initialization but once. This code
5732 static <type> guard;
5733 if (!guard.first_byte) {
5734 if (__cxa_guard_acquire (&guard)) {
5737 // Do initialization.
5738 flag = true; __cxa_guard_release (&guard);
5739 // Register variable for destruction at end of program.
5741 if (!flag) __cxa_guard_abort (&guard);
5745 Note that the `flag' variable is only set to 1 *after* the
5746 initialization is complete. This ensures that an exception,
5747 thrown during the construction, will cause the variable to
5748 reinitialized when we pass through this code again, as per:
5752 If the initialization exits by throwing an exception, the
5753 initialization is not complete, so it will be tried again
5754 the next time control enters the declaration.
5756 This process should be thread-safe, too; multiple threads
5757 should not be able to initialize the variable more than
5760 /* Create the guard variable. */
5761 guard = get_guard (decl);
5763 /* This optimization isn't safe on targets with relaxed memory
5764 consistency. On such targets we force synchronization in
5765 __cxa_guard_acquire. */
5766 if (!targetm.relaxed_ordering || !flag_threadsafe_statics)
5768 /* Begin the conditional initialization. */
5769 if_stmt = begin_if_stmt ();
5770 finish_if_stmt_cond (get_guard_cond (guard), if_stmt);
5771 then_clause = begin_compound_stmt (BCS_NO_SCOPE);
5774 if (flag_threadsafe_statics)
5776 guard_addr = build_address (guard);
5777 guard_addr_list = build_tree_list (NULL_TREE, guard_addr);
5779 acquire_fn = get_identifier ("__cxa_guard_acquire");
5780 release_fn = get_identifier ("__cxa_guard_release");
5781 abort_fn = get_identifier ("__cxa_guard_abort");
5782 if (!get_global_value_if_present (acquire_fn, &acquire_fn))
5784 tree argtypes = tree_cons (NULL_TREE, TREE_TYPE (guard_addr),
5786 tree vfntype = build_function_type (void_type_node, argtypes);
5787 acquire_fn = push_library_fn
5788 (acquire_fn, build_function_type (integer_type_node, argtypes));
5789 release_fn = push_library_fn (release_fn, vfntype);
5790 abort_fn = push_library_fn (abort_fn, vfntype);
5794 release_fn = identifier_global_value (release_fn);
5795 abort_fn = identifier_global_value (abort_fn);
5798 inner_if_stmt = begin_if_stmt ();
5799 finish_if_stmt_cond (build_call (acquire_fn, guard_addr_list),
5802 inner_then_clause = begin_compound_stmt (BCS_NO_SCOPE);
5803 begin = get_target_expr (boolean_false_node);
5804 flag = TARGET_EXPR_SLOT (begin);
5806 TARGET_EXPR_CLEANUP (begin)
5807 = build3 (COND_EXPR, void_type_node, flag,
5809 build_call (abort_fn, guard_addr_list));
5810 CLEANUP_EH_ONLY (begin) = 1;
5812 /* Do the initialization itself. */
5813 init = add_stmt_to_compound (begin, init);
5814 init = add_stmt_to_compound
5815 (init, build2 (MODIFY_EXPR, void_type_node, flag, boolean_true_node));
5816 init = add_stmt_to_compound
5817 (init, build_call (release_fn, guard_addr_list));
5820 init = add_stmt_to_compound (init, set_guard (guard));
5822 /* Use atexit to register a function for destroying this static
5824 init = add_stmt_to_compound (init, register_dtor_fn (decl));
5826 finish_expr_stmt (init);
5828 if (flag_threadsafe_statics)
5830 finish_compound_stmt (inner_then_clause);
5831 finish_then_clause (inner_if_stmt);
5832 finish_if_stmt (inner_if_stmt);
5835 if (!targetm.relaxed_ordering || !flag_threadsafe_statics)
5837 finish_compound_stmt (then_clause);
5838 finish_then_clause (if_stmt);
5839 finish_if_stmt (if_stmt);
5843 static_aggregates = tree_cons (init, decl, static_aggregates);
5847 /* Make TYPE a complete type based on INITIAL_VALUE.
5848 Return 0 if successful, 1 if INITIAL_VALUE can't be deciphered,
5849 2 if there was no information (in which case assume 0 if DO_DEFAULT),
5850 3 if the initializer list is empty (in pedantic mode). */
5853 cp_complete_array_type (tree *ptype, tree initial_value, bool do_default)
5856 tree type, elt_type;
5860 /* An array of character type can be initialized from a
5861 brace-enclosed string constant.
5863 FIXME: this code is duplicated from reshape_init. Probably
5864 we should just call reshape_init here? */
5865 if (char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (*ptype)))
5866 && TREE_CODE (initial_value) == CONSTRUCTOR
5867 && !VEC_empty (constructor_elt, CONSTRUCTOR_ELTS (initial_value)))
5869 VEC(constructor_elt,gc) *v = CONSTRUCTOR_ELTS (initial_value);
5870 tree value = VEC_index (constructor_elt, v, 0)->value;
5872 if (TREE_CODE (value) == STRING_CST
5873 && VEC_length (constructor_elt, v) == 1)
5874 initial_value = value;
5878 failure = complete_array_type (ptype, initial_value, do_default);
5880 /* We can create the array before the element type is complete, which
5881 means that we didn't have these two bits set in the original type
5882 either. In completing the type, we are expected to propagate these
5883 bits. See also complete_type which does the same thing for arrays
5886 if (TYPE_DOMAIN (type))
5888 elt_type = TREE_TYPE (type);
5889 TYPE_NEEDS_CONSTRUCTING (type) = TYPE_NEEDS_CONSTRUCTING (elt_type);
5890 TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type)
5891 = TYPE_HAS_NONTRIVIAL_DESTRUCTOR (elt_type);
5897 /* Return zero if something is declared to be a member of type
5898 CTYPE when in the context of CUR_TYPE. STRING is the error
5899 message to print in that case. Otherwise, quietly return 1. */
5902 member_function_or_else (tree ctype, tree cur_type, enum overload_flags flags)
5904 if (ctype && ctype != cur_type)
5906 if (flags == DTOR_FLAG)
5907 error ("destructor for alien class %qT cannot be a member", ctype);
5909 error ("constructor for alien class %qT cannot be a member", ctype);
5915 /* Subroutine of `grokdeclarator'. */
5917 /* Generate errors possibly applicable for a given set of specifiers.
5918 This is for ARM $7.1.2. */
5921 bad_specifiers (tree object,
5930 error ("%qD declared as a %<virtual%> %s", object, type);
5932 error ("%qD declared as an %<inline%> %s", object, type);
5934 error ("%<const%> and %<volatile%> function specifiers on "
5935 "%qD invalid in %s declaration",
5938 error ("%q+D declared as a friend", object);
5940 && (TREE_CODE (object) == TYPE_DECL
5941 || (!TYPE_PTRFN_P (TREE_TYPE (object))
5942 && !TYPE_REFFN_P (TREE_TYPE (object))
5943 && !TYPE_PTRMEMFUNC_P (TREE_TYPE (object)))))
5944 error ("%q+D declared with an exception specification", object);
5947 /* DECL is a member function or static data member and is presently
5948 being defined. Check that the definition is taking place in a
5952 check_class_member_definition_namespace (tree decl)
5954 /* These checks only apply to member functions and static data
5956 gcc_assert (TREE_CODE (decl) == FUNCTION_DECL
5957 || TREE_CODE (decl) == VAR_DECL);
5958 /* We check for problems with specializations in pt.c in
5959 check_specialization_namespace, where we can issue better
5961 if (processing_specialization)
5963 /* There are no restrictions on the placement of
5964 explicit instantiations. */
5965 if (processing_explicit_instantiation)
5969 A member function definition that appears outside of the
5970 class definition shall appear in a namespace scope enclosing
5971 the class definition.
5975 The definition for a static data member shall appear in a
5976 namespace scope enclosing the member's class definition. */
5977 if (!is_ancestor (current_namespace, DECL_CONTEXT (decl)))
5978 pedwarn ("definition of %qD is not in namespace enclosing %qT",
5979 decl, DECL_CONTEXT (decl));
5982 /* Build a PARM_DECL for the "this" parameter. TYPE is the
5983 METHOD_TYPE for a non-static member function; QUALS are the
5984 cv-qualifiers that apply to the function. */
5987 build_this_parm (tree type, cp_cv_quals quals)
5992 cp_cv_quals this_quals;
5994 this_type = TREE_VALUE (TYPE_ARG_TYPES (type));
5995 /* The `this' parameter is implicitly `const'; it cannot be
5997 this_quals = (quals & TYPE_QUAL_RESTRICT) | TYPE_QUAL_CONST;
5998 qual_type = cp_build_qualified_type (this_type, this_quals);
5999 parm = build_artificial_parm (this_identifier, qual_type);
6000 cp_apply_type_quals_to_decl (this_quals, parm);
6004 /* CTYPE is class type, or null if non-class.
6005 TYPE is type this FUNCTION_DECL should have, either FUNCTION_TYPE
6007 DECLARATOR is the function's name.
6008 PARMS is a chain of PARM_DECLs for the function.
6009 VIRTUALP is truthvalue of whether the function is virtual or not.
6010 FLAGS are to be passed through to `grokclassfn'.
6011 QUALS are qualifiers indicating whether the function is `const'
6013 RAISES is a list of exceptions that this function can raise.
6014 CHECK is 1 if we must find this method in CTYPE, 0 if we should
6015 not look, and -1 if we should not call `grokclassfn' at all.
6017 SFK is the kind of special function (if any) for the new function.
6019 Returns `NULL_TREE' if something goes wrong, after issuing
6020 applicable error messages. */
6023 grokfndecl (tree ctype,
6027 tree orig_declarator,
6029 enum overload_flags flags,
6036 special_function_kind sfk,
6043 int staticp = ctype && TREE_CODE (type) == FUNCTION_TYPE;
6047 type = build_exception_variant (type, raises);
6049 decl = build_lang_decl (FUNCTION_DECL, declarator, type);
6050 if (TREE_CODE (type) == METHOD_TYPE)
6053 parm = build_this_parm (type, quals);
6054 TREE_CHAIN (parm) = parms;
6057 DECL_ARGUMENTS (decl) = parms;
6058 /* Propagate volatile out from type to decl. */
6059 if (TYPE_VOLATILE (type))
6060 TREE_THIS_VOLATILE (decl) = 1;
6062 /* If pointers to member functions use the least significant bit to
6063 indicate whether a function is virtual, ensure a pointer
6064 to this function will have that bit clear. */
6065 if (TARGET_PTRMEMFUNC_VBIT_LOCATION == ptrmemfunc_vbit_in_pfn
6066 && TREE_CODE (type) == METHOD_TYPE
6067 && DECL_ALIGN (decl) < 2 * BITS_PER_UNIT)
6068 DECL_ALIGN (decl) = 2 * BITS_PER_UNIT;
6071 && TREE_CODE (orig_declarator) == TEMPLATE_ID_EXPR)
6075 ("defining explicit specialization %qD in friend declaration",
6079 tree fns = TREE_OPERAND (orig_declarator, 0);
6080 tree args = TREE_OPERAND (orig_declarator, 1);
6082 if (PROCESSING_REAL_TEMPLATE_DECL_P ())
6084 /* Something like `template <class T> friend void f<T>()'. */
6085 error ("invalid use of template-id %qD in declaration "
6086 "of primary template",
6092 /* A friend declaration of the form friend void f<>(). Record
6093 the information in the TEMPLATE_ID_EXPR. */
6094 SET_DECL_IMPLICIT_INSTANTIATION (decl);
6096 if (TREE_CODE (fns) == COMPONENT_REF)
6098 /* Due to bison parser ickiness, we will have already looked
6099 up an operator_name or PFUNCNAME within the current class
6100 (see template_id in parse.y). If the current class contains
6101 such a name, we'll get a COMPONENT_REF here. Undo that. */
6103 gcc_assert (TREE_TYPE (TREE_OPERAND (fns, 0))
6104 == current_class_type);
6105 fns = TREE_OPERAND (fns, 1);
6107 gcc_assert (TREE_CODE (fns) == IDENTIFIER_NODE
6108 || TREE_CODE (fns) == OVERLOAD);
6109 DECL_TEMPLATE_INFO (decl) = tree_cons (fns, args, NULL_TREE);
6111 for (t = TYPE_ARG_TYPES (TREE_TYPE (decl)); t; t = TREE_CHAIN (t))
6112 if (TREE_PURPOSE (t)
6113 && TREE_CODE (TREE_PURPOSE (t)) == DEFAULT_ARG)
6115 error ("default arguments are not allowed in declaration "
6116 "of friend template specialization %qD",
6123 error ("%<inline%> is not allowed in declaration of friend "
6124 "template specialization %qD",
6131 /* If this decl has namespace scope, set that up. */
6133 set_decl_namespace (decl, in_namespace, friendp);
6135 DECL_CONTEXT (decl) = FROB_CONTEXT (current_namespace);
6137 /* `main' and builtins have implicit 'C' linkage. */
6138 if ((MAIN_NAME_P (declarator)
6139 || (IDENTIFIER_LENGTH (declarator) > 10
6140 && IDENTIFIER_POINTER (declarator)[0] == '_'
6141 && IDENTIFIER_POINTER (declarator)[1] == '_'
6142 && strncmp (IDENTIFIER_POINTER (declarator)+2, "builtin_", 8) == 0))
6143 && current_lang_name == lang_name_cplusplus
6144 && ctype == NULL_TREE
6145 /* NULL_TREE means global namespace. */
6146 && DECL_CONTEXT (decl) == NULL_TREE)
6147 SET_DECL_LANGUAGE (decl, lang_c);
6149 /* Should probably propagate const out from type to decl I bet (mrs). */
6152 DECL_STATIC_FUNCTION_P (decl) = 1;
6153 DECL_CONTEXT (decl) = ctype;
6158 DECL_CONTEXT (decl) = ctype;
6160 check_class_member_definition_namespace (decl);
6163 if (ctype == NULL_TREE && DECL_MAIN_P (decl))
6165 if (processing_template_decl)
6166 error ("cannot declare %<::main%> to be a template");
6168 error ("cannot declare %<::main%> to be inline");
6170 error ("cannot declare %<::main%> to be static");
6175 /* Members of anonymous types and local classes have no linkage; make
6176 them internal. If a typedef is made later, this will be changed. */
6177 if (ctype && (TYPE_ANONYMOUS_P (ctype)
6178 || decl_function_context (TYPE_MAIN_DECL (ctype))))
6183 /* [basic.link]: A name with no linkage (notably, the name of a class
6184 or enumeration declared in a local scope) shall not be used to
6185 declare an entity with linkage.
6187 Only check this for public decls for now. See core 319, 389. */
6188 t = no_linkage_check (TREE_TYPE (decl),
6189 /*relaxed_p=*/false);
6192 if (TYPE_ANONYMOUS_P (t))
6194 if (DECL_EXTERN_C_P (decl))
6195 /* Allow this; it's pretty common in C. */;
6198 pedwarn ("non-local function %q#D uses anonymous type",
6200 if (DECL_ORIGINAL_TYPE (TYPE_NAME (t)))
6201 pedwarn ("%q+#D does not refer to the unqualified "
6202 "type, so it is not used for linkage",
6207 pedwarn ("non-local function %q#D uses local type %qT", decl, t);
6211 TREE_PUBLIC (decl) = publicp;
6214 DECL_INTERFACE_KNOWN (decl) = 1;
6215 DECL_NOT_REALLY_EXTERN (decl) = 1;
6218 /* If the declaration was declared inline, mark it as such. */
6220 DECL_DECLARED_INLINE_P (decl) = 1;
6221 /* We inline functions that are explicitly declared inline, or, when
6222 the user explicitly asks us to, all functions. */
6223 if (DECL_DECLARED_INLINE_P (decl)
6224 || (flag_inline_trees == 2 && !DECL_INLINE (decl) && funcdef_flag))
6225 DECL_INLINE (decl) = 1;
6227 DECL_EXTERNAL (decl) = 1;
6228 if (quals && TREE_CODE (type) == FUNCTION_TYPE)
6230 error ("%smember function %qD cannot have cv-qualifier",
6231 (ctype ? "static " : "non-"), decl);
6232 quals = TYPE_UNQUALIFIED;
6235 if (IDENTIFIER_OPNAME_P (DECL_NAME (decl))
6236 && !grok_op_properties (decl, /*complain=*/true))
6239 if (ctype && decl_function_context (decl))
6240 DECL_NO_STATIC_CHAIN (decl) = 1;
6243 /* Make the init_value nonzero so pushdecl knows this is not
6244 tentative. error_mark_node is replaced later with the BLOCK. */
6245 DECL_INITIAL (decl) = error_mark_node;
6247 if (TYPE_NOTHROW_P (type) || nothrow_libfn_p (decl))
6248 TREE_NOTHROW (decl) = 1;
6250 /* Caller will do the rest of this. */
6254 if (ctype != NULL_TREE)
6256 if (sfk == sfk_constructor)
6257 DECL_CONSTRUCTOR_P (decl) = 1;
6259 grokclassfn (ctype, decl, flags);
6262 decl = check_explicit_specialization (orig_declarator, decl,
6265 4 * (friendp != 0));
6266 if (decl == error_mark_node)
6271 cplus_decl_attributes (&decl, *attrlist, 0);
6272 *attrlist = NULL_TREE;
6275 /* Check main's type after attributes have been applied. */
6276 if (ctype == NULL_TREE && DECL_MAIN_P (decl)
6277 && !same_type_p (TREE_TYPE (TREE_TYPE (decl)),
6280 tree oldtypeargs = TYPE_ARG_TYPES (TREE_TYPE (decl));
6282 error ("%<::main%> must return %<int%>");
6283 newtype = build_function_type (integer_type_node, oldtypeargs);
6284 TREE_TYPE (decl) = newtype;
6287 if (ctype != NULL_TREE
6288 && (! TYPE_FOR_JAVA (ctype) || check_java_method (decl))
6293 old_decl = check_classfn (ctype, decl,
6294 (processing_template_decl
6295 > template_class_depth (ctype))
6296 ? current_template_parms
6303 if (TREE_CODE (old_decl) == TEMPLATE_DECL)
6304 /* Because grokfndecl is always supposed to return a
6305 FUNCTION_DECL, we pull out the DECL_TEMPLATE_RESULT
6306 here. We depend on our callers to figure out that its
6307 really a template that's being returned. */
6308 old_decl = DECL_TEMPLATE_RESULT (old_decl);
6310 if (DECL_STATIC_FUNCTION_P (old_decl)
6311 && TREE_CODE (TREE_TYPE (decl)) == METHOD_TYPE)
6312 /* Remove the `this' parm added by grokclassfn.
6313 XXX Isn't this done in start_function, too? */
6314 revert_static_member_fn (decl);
6315 if (DECL_ARTIFICIAL (old_decl))
6316 error ("definition of implicitly-declared %qD", old_decl);
6318 /* Since we've smashed OLD_DECL to its
6319 DECL_TEMPLATE_RESULT, we must do the same to DECL. */
6320 if (TREE_CODE (decl) == TEMPLATE_DECL)
6321 decl = DECL_TEMPLATE_RESULT (decl);
6323 /* Attempt to merge the declarations. This can fail, in
6324 the case of some invalid specialization declarations. */
6325 pushed_scope = push_scope (ctype);
6326 ok = duplicate_decls (decl, old_decl, friendp);
6328 pop_scope (pushed_scope);
6331 error ("no %q#D member function declared in class %qT",
6339 if (DECL_CONSTRUCTOR_P (decl) && !grok_ctor_properties (ctype, decl))
6342 if (ctype == NULL_TREE || check)
6346 DECL_VIRTUAL_P (decl) = 1;
6351 /* DECL is a VAR_DECL for a static data member. Set flags to reflect
6352 the linkage that DECL will receive in the object file. */
6355 set_linkage_for_static_data_member (tree decl)
6357 /* A static data member always has static storage duration and
6358 external linkage. Note that static data members are forbidden in
6359 local classes -- the only situation in which a class has
6360 non-external linkage. */
6361 TREE_PUBLIC (decl) = 1;
6362 TREE_STATIC (decl) = 1;
6363 /* For non-template classes, static data members are always put
6364 out in exactly those files where they are defined, just as
6365 with ordinary namespace-scope variables. */
6366 if (!processing_template_decl)
6367 DECL_INTERFACE_KNOWN (decl) = 1;
6370 /* Create a VAR_DECL named NAME with the indicated TYPE.
6372 If SCOPE is non-NULL, it is the class type or namespace containing
6373 the variable. If SCOPE is NULL, the variable should is created in
6374 the innermost enclosings scope. */
6377 grokvardecl (tree type,
6379 const cp_decl_specifier_seq *declspecs,
6385 tree explicit_scope;
6387 gcc_assert (!name || TREE_CODE (name) == IDENTIFIER_NODE);
6389 /* Compute the scope in which to place the variable, but remember
6390 whether or not that scope was explicitly specified by the user. */
6391 explicit_scope = scope;
6394 /* An explicit "extern" specifier indicates a namespace-scope
6396 if (declspecs->storage_class == sc_extern)
6397 scope = current_namespace;
6398 else if (!at_function_scope_p ())
6399 scope = current_scope ();
6403 && (/* If the variable is a namespace-scope variable declared in a
6404 template, we need DECL_LANG_SPECIFIC. */
6405 (TREE_CODE (scope) == NAMESPACE_DECL && processing_template_decl)
6406 /* Similarly for namespace-scope variables with language linkage
6408 || (TREE_CODE (scope) == NAMESPACE_DECL
6409 && current_lang_name != lang_name_cplusplus)
6410 /* Similarly for static data members. */
6412 decl = build_lang_decl (VAR_DECL, name, type);
6414 decl = build_decl (VAR_DECL, name, type);
6416 if (explicit_scope && TREE_CODE (explicit_scope) == NAMESPACE_DECL)
6417 set_decl_namespace (decl, explicit_scope, 0);
6419 DECL_CONTEXT (decl) = FROB_CONTEXT (scope);
6421 if (declspecs->storage_class == sc_extern)
6423 DECL_THIS_EXTERN (decl) = 1;
6424 DECL_EXTERNAL (decl) = !initialized;
6427 if (DECL_CLASS_SCOPE_P (decl))
6429 set_linkage_for_static_data_member (decl);
6430 /* This function is only called with out-of-class definitions. */
6431 DECL_EXTERNAL (decl) = 0;
6432 check_class_member_definition_namespace (decl);
6434 /* At top level, either `static' or no s.c. makes a definition
6435 (perhaps tentative), and absence of `static' makes it public. */
6436 else if (toplevel_bindings_p ())
6438 TREE_PUBLIC (decl) = (declspecs->storage_class != sc_static
6439 && (DECL_THIS_EXTERN (decl) || ! constp));
6440 TREE_STATIC (decl) = ! DECL_EXTERNAL (decl);
6442 /* Not at top level, only `static' makes a static definition. */
6445 TREE_STATIC (decl) = declspecs->storage_class == sc_static;
6446 TREE_PUBLIC (decl) = DECL_EXTERNAL (decl);
6449 if (declspecs->specs[(int)ds_thread])
6451 if (targetm.have_tls)
6452 DECL_TLS_MODEL (decl) = decl_default_tls_model (decl);
6454 /* A mere warning is sure to result in improper semantics
6455 at runtime. Don't bother to allow this to compile. */
6456 error ("thread-local storage not supported for this target");
6459 if (TREE_PUBLIC (decl))
6461 /* [basic.link]: A name with no linkage (notably, the name of a class
6462 or enumeration declared in a local scope) shall not be used to
6463 declare an entity with linkage.
6465 Only check this for public decls for now. */
6466 tree t = no_linkage_check (TREE_TYPE (decl), /*relaxed_p=*/false);
6469 if (TYPE_ANONYMOUS_P (t))
6471 if (DECL_EXTERN_C_P (decl))
6472 /* Allow this; it's pretty common in C. */
6476 /* DRs 132, 319 and 389 seem to indicate types with
6477 no linkage can only be used to declare extern "C"
6478 entities. Since it's not always an error in the
6479 ISO C++ 90 Standard, we only issue a warning. */
6480 warning (0, "non-local variable %q#D uses anonymous type",
6482 if (DECL_ORIGINAL_TYPE (TYPE_NAME (t)))
6483 warning (0, "%q+#D does not refer to the unqualified "
6484 "type, so it is not used for linkage",
6489 warning (0, "non-local variable %q#D uses local type %qT", decl, t);
6493 DECL_INTERFACE_KNOWN (decl) = 1;
6498 /* Create and return a canonical pointer to member function type, for
6499 TYPE, which is a POINTER_TYPE to a METHOD_TYPE. */
6502 build_ptrmemfunc_type (tree type)
6506 tree unqualified_variant = NULL_TREE;
6508 if (type == error_mark_node)
6511 /* If a canonical type already exists for this type, use it. We use
6512 this method instead of type_hash_canon, because it only does a
6513 simple equality check on the list of field members. */
6515 if ((t = TYPE_GET_PTRMEMFUNC_TYPE (type)))
6518 /* Make sure that we always have the unqualified pointer-to-member
6520 if (cp_type_quals (type) != TYPE_UNQUALIFIED)
6522 = build_ptrmemfunc_type (TYPE_MAIN_VARIANT (type));
6524 t = make_aggr_type (RECORD_TYPE);
6525 xref_basetypes (t, NULL_TREE);
6527 /* Let the front-end know this is a pointer to member function... */
6528 TYPE_PTRMEMFUNC_FLAG (t) = 1;
6529 /* ... and not really an aggregate. */
6530 SET_IS_AGGR_TYPE (t, 0);
6532 field = build_decl (FIELD_DECL, pfn_identifier, type);
6535 field = build_decl (FIELD_DECL, delta_identifier, delta_type_node);
6536 TREE_CHAIN (field) = fields;
6539 finish_builtin_struct (t, "__ptrmemfunc_type", fields, ptr_type_node);
6541 /* Zap out the name so that the back-end will give us the debugging
6542 information for this anonymous RECORD_TYPE. */
6543 TYPE_NAME (t) = NULL_TREE;
6545 /* If this is not the unqualified form of this pointer-to-member
6546 type, set the TYPE_MAIN_VARIANT for this type to be the
6547 unqualified type. Since they are actually RECORD_TYPEs that are
6548 not variants of each other, we must do this manually. */
6549 if (cp_type_quals (type) != TYPE_UNQUALIFIED)
6551 t = build_qualified_type (t, cp_type_quals (type));
6552 TYPE_MAIN_VARIANT (t) = unqualified_variant;
6553 TYPE_NEXT_VARIANT (t) = TYPE_NEXT_VARIANT (unqualified_variant);
6554 TYPE_NEXT_VARIANT (unqualified_variant) = t;
6557 /* Cache this pointer-to-member type so that we can find it again
6559 TYPE_SET_PTRMEMFUNC_TYPE (type, t);
6564 /* Create and return a pointer to data member type. */
6567 build_ptrmem_type (tree class_type, tree member_type)
6569 if (TREE_CODE (member_type) == METHOD_TYPE)
6573 arg_types = TYPE_ARG_TYPES (member_type);
6574 class_type = (cp_build_qualified_type
6576 cp_type_quals (TREE_TYPE (TREE_VALUE (arg_types)))));
6578 = build_method_type_directly (class_type,
6579 TREE_TYPE (member_type),
6580 TREE_CHAIN (arg_types));
6581 return build_ptrmemfunc_type (build_pointer_type (member_type));
6585 gcc_assert (TREE_CODE (member_type) != FUNCTION_TYPE);
6586 return build_offset_type (class_type, member_type);
6590 /* DECL is a VAR_DECL defined in-class, whose TYPE is also given.
6591 Check to see that the definition is valid. Issue appropriate error
6592 messages. Return 1 if the definition is particularly bad, or 0
6596 check_static_variable_definition (tree decl, tree type)
6598 /* Motion 10 at San Diego: If a static const integral data member is
6599 initialized with an integral constant expression, the initializer
6600 may appear either in the declaration (within the class), or in
6601 the definition, but not both. If it appears in the class, the
6602 member is a member constant. The file-scope definition is always
6604 if (!ARITHMETIC_TYPE_P (type) && TREE_CODE (type) != ENUMERAL_TYPE)
6606 error ("invalid in-class initialization of static data member "
6607 "of non-integral type %qT",
6609 /* If we just return the declaration, crashes will sometimes
6610 occur. We therefore return void_type_node, as if this were a
6611 friend declaration, to cause callers to completely ignore
6612 this declaration. */
6615 else if (!CP_TYPE_CONST_P (type))
6616 error ("ISO C++ forbids in-class initialization of non-const "
6617 "static member %qD",
6619 else if (pedantic && !INTEGRAL_TYPE_P (type))
6620 pedwarn ("ISO C++ forbids initialization of member constant "
6621 "%qD of non-integral type %qT", decl, type);
6626 /* Given the SIZE (i.e., number of elements) in an array, compute an
6627 appropriate index type for the array. If non-NULL, NAME is the
6628 name of the thing being declared. */
6631 compute_array_index_type (tree name, tree size)
6636 if (error_operand_p (size))
6637 return error_mark_node;
6639 type = TREE_TYPE (size);
6640 /* The array bound must be an integer type. */
6641 if (!dependent_type_p (type) && !INTEGRAL_TYPE_P (type))
6644 error ("size of array %qD has non-integral type %qT", name, type);
6646 error ("size of array has non-integral type %qT", type);
6647 size = integer_one_node;
6648 type = TREE_TYPE (size);
6651 if (abi_version_at_least (2)
6652 /* We should only handle value dependent expressions specially. */
6653 ? value_dependent_expression_p (size)
6654 /* But for abi-1, we handled all instances in templates. This
6655 effects the manglings produced. */
6656 : processing_template_decl)
6657 return build_index_type (build_min (MINUS_EXPR, sizetype,
6658 size, integer_one_node));
6660 /* The size might be the result of a cast. */
6661 STRIP_TYPE_NOPS (size);
6663 /* It might be a const variable or enumeration constant. */
6664 size = integral_constant_value (size);
6666 /* Normally, the array-bound will be a constant. */
6667 if (TREE_CODE (size) == INTEGER_CST)
6669 /* Check to see if the array bound overflowed. Make that an
6670 error, no matter how generous we're being. */
6671 int old_flag_pedantic_errors = flag_pedantic_errors;
6672 int old_pedantic = pedantic;
6673 pedantic = flag_pedantic_errors = 1;
6674 constant_expression_warning (size);
6675 pedantic = old_pedantic;
6676 flag_pedantic_errors = old_flag_pedantic_errors;
6678 /* An array must have a positive number of elements. */
6679 if (INT_CST_LT (size, integer_zero_node))
6682 error ("size of array %qD is negative", name);
6684 error ("size of array is negative");
6685 size = integer_one_node;
6687 /* As an extension we allow zero-sized arrays. We always allow
6688 them in system headers because glibc uses them. */
6689 else if (integer_zerop (size) && pedantic && !in_system_header)
6692 pedwarn ("ISO C++ forbids zero-size array %qD", name);
6694 pedwarn ("ISO C++ forbids zero-size array");
6697 else if (TREE_CONSTANT (size))
6699 /* `(int) &fn' is not a valid array bound. */
6701 error ("size of array %qD is not an integral constant-expression",
6704 error ("size of array is not an integral constant-expression");
6705 size = integer_one_node;
6707 else if (pedantic && warn_vla != 0)
6710 pedwarn ("ISO C++ forbids variable length array %qD", name);
6712 pedwarn ("ISO C++ forbids variable length array");
6714 else if (warn_vla > 0)
6718 "variable length array %qD is used", name);
6721 "variable length array is used");
6724 if (processing_template_decl && !TREE_CONSTANT (size))
6725 /* A variable sized array. */
6726 itype = build_min (MINUS_EXPR, sizetype, size, integer_one_node);
6729 HOST_WIDE_INT saved_processing_template_decl;
6731 /* Compute the index of the largest element in the array. It is
6732 one less than the number of elements in the array. We save
6733 and restore PROCESSING_TEMPLATE_DECL so that computations in
6734 cp_build_binary_op will be appropriately folded. */
6735 saved_processing_template_decl = processing_template_decl;
6736 processing_template_decl = 0;
6737 itype = cp_build_binary_op (MINUS_EXPR,
6738 cp_convert (ssizetype, size),
6739 cp_convert (ssizetype, integer_one_node));
6740 itype = fold (itype);
6741 processing_template_decl = saved_processing_template_decl;
6743 if (!TREE_CONSTANT (itype))
6744 /* A variable sized array. */
6745 itype = variable_size (itype);
6746 /* Make sure that there was no overflow when creating to a signed
6747 index type. (For example, on a 32-bit machine, an array with
6748 size 2^32 - 1 is too big.) */
6749 else if (TREE_CODE (itype) == INTEGER_CST
6750 && TREE_OVERFLOW (itype))
6752 error ("overflow in array dimension");
6753 TREE_OVERFLOW (itype) = 0;
6757 /* Create and return the appropriate index type. */
6758 return build_index_type (itype);
6761 /* Returns the scope (if any) in which the entity declared by
6762 DECLARATOR will be located. If the entity was declared with an
6763 unqualified name, NULL_TREE is returned. */
6766 get_scope_of_declarator (const cp_declarator *declarator)
6768 while (declarator && declarator->kind != cdk_id)
6769 declarator = declarator->declarator;
6771 /* If the declarator-id is a SCOPE_REF, the scope in which the
6772 declaration occurs is the first operand. */
6774 && declarator->u.id.qualifying_scope)
6775 return declarator->u.id.qualifying_scope;
6777 /* Otherwise, the declarator is not a qualified name; the entity will
6778 be declared in the current scope. */
6782 /* Returns an ARRAY_TYPE for an array with SIZE elements of the
6783 indicated TYPE. If non-NULL, NAME is the NAME of the declaration
6787 create_array_type_for_decl (tree name, tree type, tree size)
6789 tree itype = NULL_TREE;
6790 const char* error_msg;
6792 /* If things have already gone awry, bail now. */
6793 if (type == error_mark_node || size == error_mark_node)
6794 return error_mark_node;
6796 /* Assume that everything will go OK. */
6799 /* There are some types which cannot be array elements. */
6800 switch (TREE_CODE (type))
6803 error_msg = "array of void";
6807 error_msg = "array of functions";
6810 case REFERENCE_TYPE:
6811 error_msg = "array of references";
6815 error_msg = "array of function members";
6822 /* If something went wrong, issue an error-message and return. */
6826 error ("declaration of %qD as %s", name, error_msg);
6828 error ("creating %s", error_msg);
6830 return error_mark_node;
6835 The constant expressions that specify the bounds of the arrays
6836 can be omitted only for the first member of the sequence. */
6837 if (TREE_CODE (type) == ARRAY_TYPE && !TYPE_DOMAIN (type))
6840 error ("declaration of %qD as multidimensional array must "
6841 "have bounds for all dimensions except the first",
6844 error ("multidimensional array must have bounds for all "
6845 "dimensions except the first");
6847 return error_mark_node;
6850 /* Figure out the index type for the array. */
6852 itype = compute_array_index_type (name, size);
6855 T is called the array element type; this type shall not be [...] an
6856 abstract class type. */
6857 abstract_virtuals_error (name, type);
6859 return build_cplus_array_type (type, itype);
6862 /* Check that it's OK to declare a function with the indicated TYPE.
6863 SFK indicates the kind of special function (if any) that this
6864 function is. OPTYPE is the type given in a conversion operator
6865 declaration, or the class type for a constructor/destructor.
6866 Returns the actual return type of the function; that
6867 may be different than TYPE if an error occurs, or for certain
6868 special functions. */
6871 check_special_function_return_type (special_function_kind sfk,
6877 case sfk_constructor:
6879 error ("return type specification for constructor invalid");
6881 if (targetm.cxx.cdtor_returns_this () && !TYPE_FOR_JAVA (optype))
6882 type = build_pointer_type (optype);
6884 type = void_type_node;
6887 case sfk_destructor:
6889 error ("return type specification for destructor invalid");
6890 /* We can't use the proper return type here because we run into
6891 problems with ambiguous bases and covariant returns.
6892 Java classes are left unchanged because (void *) isn't a valid
6893 Java type, and we don't want to change the Java ABI. */
6894 if (targetm.cxx.cdtor_returns_this () && !TYPE_FOR_JAVA (optype))
6895 type = build_pointer_type (void_type_node);
6897 type = void_type_node;
6900 case sfk_conversion:
6901 if (type && !same_type_p (type, optype))
6902 error ("operator %qT declared to return %qT", optype, type);
6904 pedwarn ("return type specified for %<operator %T%>", optype);
6915 /* A variable or data member (whose unqualified name is IDENTIFIER)
6916 has been declared with the indicated TYPE. If the TYPE is not
6917 acceptable, issue an error message and return a type to use for
6918 error-recovery purposes. */
6921 check_var_type (tree identifier, tree type)
6923 if (VOID_TYPE_P (type))
6926 error ("unnamed variable or field declared void");
6927 else if (TREE_CODE (identifier) == IDENTIFIER_NODE)
6929 gcc_assert (!IDENTIFIER_OPNAME_P (identifier));
6930 error ("variable or field %qE declared void", identifier);
6933 error ("variable or field declared void");
6934 type = error_mark_node;
6940 /* Given declspecs and a declarator (abstract or otherwise), determine
6941 the name and type of the object declared and construct a DECL node
6944 DECLSPECS is a chain of tree_list nodes whose value fields
6945 are the storage classes and type specifiers.
6947 DECL_CONTEXT says which syntactic context this declaration is in:
6948 NORMAL for most contexts. Make a VAR_DECL or FUNCTION_DECL or TYPE_DECL.
6949 FUNCDEF for a function definition. Like NORMAL but a few different
6950 error messages in each case. Return value may be zero meaning
6951 this definition is too screwy to try to parse.
6952 MEMFUNCDEF for a function definition. Like FUNCDEF but prepares to
6953 handle member functions (which have FIELD context).
6954 Return value may be zero meaning this definition is too screwy to
6956 PARM for a parameter declaration (either within a function prototype
6957 or before a function body). Make a PARM_DECL, or return void_type_node.
6958 CATCHPARM for a parameter declaration before a catch clause.
6959 TYPENAME if for a typename (in a cast or sizeof).
6960 Don't make a DECL node; just return the ..._TYPE node.
6961 FIELD for a struct or union field; make a FIELD_DECL.
6962 BITFIELD for a field with specified width.
6963 INITIALIZED is 1 if the decl has an initializer.
6965 ATTRLIST is a pointer to the list of attributes, which may be NULL
6966 if there are none; *ATTRLIST may be modified if attributes from inside
6967 the declarator should be applied to the declaration.
6969 When this function is called, scoping variables (such as
6970 CURRENT_CLASS_TYPE) should reflect the scope in which the
6971 declaration occurs, not the scope in which the new declaration will
6972 be placed. For example, on:
6976 when grokdeclarator is called for `S::f', the CURRENT_CLASS_TYPE
6979 Returns a DECL (if a declarator is present), a TYPE (if there is no
6980 declarator, in cases like "struct S;"), or the ERROR_MARK_NODE if an
6984 grokdeclarator (const cp_declarator *declarator,
6985 const cp_decl_specifier_seq *declspecs,
6986 enum decl_context decl_context,
6990 tree type = NULL_TREE;
6992 int virtualp, explicitp, friendp, inlinep, staticp;
6993 int explicit_int = 0;
6994 int explicit_char = 0;
6995 int defaulted_int = 0;
6996 tree dependent_name = NULL_TREE;
6998 tree typedef_decl = NULL_TREE;
6999 const char *name = NULL;
7000 tree typedef_type = NULL_TREE;
7001 /* True if this declarator is a function definition. */
7002 bool funcdef_flag = false;
7003 cp_declarator_kind innermost_code = cdk_error;
7006 /* See the code below that used this. */
7007 tree decl_attr = NULL_TREE;
7010 /* Keep track of what sort of function is being processed
7011 so that we can warn about default return values, or explicit
7012 return values which do not match prescribed defaults. */
7013 special_function_kind sfk = sfk_none;
7015 tree dname = NULL_TREE;
7016 tree ctor_return_type = NULL_TREE;
7017 enum overload_flags flags = NO_SPECIAL;
7018 /* cv-qualifiers that apply to the declarator, for a declaration of
7019 a member function. */
7020 cp_cv_quals memfn_quals = TYPE_UNQUALIFIED;
7021 /* cv-qualifiers that apply to the type specified by the DECLSPECS. */
7023 tree raises = NULL_TREE;
7024 int template_count = 0;
7025 tree returned_attrs = NULL_TREE;
7026 tree parms = NULL_TREE;
7027 const cp_declarator *id_declarator;
7028 /* The unqualified name of the declarator; either an
7029 IDENTIFIER_NODE, BIT_NOT_EXPR, or TEMPLATE_ID_EXPR. */
7030 tree unqualified_id;
7031 /* The class type, if any, in which this entity is located,
7032 or NULL_TREE if none. Note that this value may be different from
7033 the current class type; for example if an attempt is made to declare
7034 "A::f" inside "B", this value will be "A". */
7035 tree ctype = current_class_type;
7036 /* The NAMESPACE_DECL for the namespace in which this entity is
7037 located. If an unqualified name is used to declare the entity,
7038 this value will be NULL_TREE, even if the entity is located at
7040 tree in_namespace = NULL_TREE;
7041 cp_storage_class storage_class;
7042 bool unsigned_p, signed_p, short_p, long_p, thread_p;
7043 bool type_was_error_mark_node = false;
7045 signed_p = declspecs->specs[(int)ds_signed];
7046 unsigned_p = declspecs->specs[(int)ds_unsigned];
7047 short_p = declspecs->specs[(int)ds_short];
7048 long_p = declspecs->specs[(int)ds_long];
7049 longlong = declspecs->specs[(int)ds_long] >= 2;
7050 thread_p = declspecs->specs[(int)ds_thread];
7052 if (decl_context == FUNCDEF)
7053 funcdef_flag = true, decl_context = NORMAL;
7054 else if (decl_context == MEMFUNCDEF)
7055 funcdef_flag = true, decl_context = FIELD;
7056 else if (decl_context == BITFIELD)
7057 bitfield = 1, decl_context = FIELD;
7059 /* Look inside a declarator for the name being declared
7060 and get it as a string, for an error message. */
7061 for (id_declarator = declarator;
7063 id_declarator = id_declarator->declarator)
7065 if (id_declarator->kind != cdk_id)
7066 innermost_code = id_declarator->kind;
7068 switch (id_declarator->kind)
7071 if (id_declarator->declarator
7072 && id_declarator->declarator->kind == cdk_id)
7074 sfk = id_declarator->declarator->u.id.sfk;
7075 if (sfk == sfk_destructor)
7082 tree qualifying_scope = id_declarator->u.id.qualifying_scope;
7083 tree decl = id_declarator->u.id.unqualified_name;
7086 if (qualifying_scope)
7088 if (at_function_scope_p ())
7092 A declarator-id shall not be qualified except
7095 None of the cases are permitted in block
7097 if (qualifying_scope == global_namespace)
7098 error ("invalid use of qualified-name %<::%D%>",
7100 else if (TYPE_P (qualifying_scope))
7101 error ("invalid use of qualified-name %<%T::%D%>",
7102 qualifying_scope, decl);
7104 error ("invalid use of qualified-name %<%D::%D%>",
7105 qualifying_scope, decl);
7106 return error_mark_node;
7108 else if (TYPE_P (qualifying_scope))
7110 ctype = qualifying_scope;
7111 if (innermost_code != cdk_function
7112 && current_class_type
7113 && !UNIQUELY_DERIVED_FROM_P (ctype,
7114 current_class_type))
7116 error ("type %qT is not derived from type %qT",
7117 ctype, current_class_type);
7118 return error_mark_node;
7121 else if (TREE_CODE (qualifying_scope) == NAMESPACE_DECL)
7122 in_namespace = qualifying_scope;
7124 switch (TREE_CODE (decl))
7130 if (innermost_code != cdk_function)
7132 error ("declaration of %qD as non-function", decl);
7133 return error_mark_node;
7135 else if (!qualifying_scope
7136 && !(current_class_type && at_class_scope_p ()))
7138 error ("declaration of %qD as non-member", decl);
7139 return error_mark_node;
7142 type = TREE_OPERAND (decl, 0);
7143 name = IDENTIFIER_POINTER (constructor_name (type));
7148 case TEMPLATE_ID_EXPR:
7150 tree fns = TREE_OPERAND (decl, 0);
7153 if (TREE_CODE (dname) != IDENTIFIER_NODE)
7155 gcc_assert (is_overloaded_fn (dname));
7156 dname = DECL_NAME (get_first_fn (dname));
7161 case IDENTIFIER_NODE:
7162 if (TREE_CODE (decl) == IDENTIFIER_NODE)
7165 if (C_IS_RESERVED_WORD (dname))
7167 error ("declarator-id missing; using reserved word %qD",
7169 name = IDENTIFIER_POINTER (dname);
7171 else if (!IDENTIFIER_TYPENAME_P (dname))
7172 name = IDENTIFIER_POINTER (dname);
7175 gcc_assert (flags == NO_SPECIAL);
7176 flags = TYPENAME_FLAG;
7177 ctor_return_type = TREE_TYPE (dname);
7178 sfk = sfk_conversion;
7179 if (is_typename_at_global_scope (dname))
7180 name = IDENTIFIER_POINTER (dname);
7182 name = "<invalid operator>";
7198 return error_mark_node;
7204 if (id_declarator->kind == cdk_id)
7210 The declarator in a function-definition shall have the form
7211 D1 ( parameter-declaration-clause) ... */
7212 if (funcdef_flag && innermost_code != cdk_function)
7214 error ("function definition does not declare parameters");
7215 return error_mark_node;
7218 if (((dname && IDENTIFIER_OPNAME_P (dname)) || flags == TYPENAME_FLAG)
7219 && innermost_code != cdk_function
7220 && ! (ctype && !declspecs->any_specifiers_p))
7222 error ("declaration of %qD as non-function", dname);
7223 return error_mark_node;
7226 /* Anything declared one level down from the top level
7227 must be one of the parameters of a function
7228 (because the body is at least two levels down). */
7230 /* This heuristic cannot be applied to C++ nodes! Fixed, however,
7231 by not allowing C++ class definitions to specify their parameters
7232 with xdecls (must be spec.d in the parmlist).
7234 Since we now wait to push a class scope until we are sure that
7235 we are in a legitimate method context, we must set oldcname
7236 explicitly (since current_class_name is not yet alive).
7238 We also want to avoid calling this a PARM if it is in a namespace. */
7240 if (decl_context == NORMAL && !toplevel_bindings_p ())
7242 struct cp_binding_level *b = current_binding_level;
7243 current_binding_level = b->level_chain;
7244 if (current_binding_level != 0 && toplevel_bindings_p ())
7245 decl_context = PARM;
7246 current_binding_level = b;
7250 name = decl_context == PARM ? "parameter" : "type name";
7252 /* If there were multiple types specified in the decl-specifier-seq,
7253 issue an error message. */
7254 if (declspecs->multiple_types_p)
7256 error ("two or more data types in declaration of %qs", name);
7257 return error_mark_node;
7260 /* Extract the basic type from the decl-specifier-seq. */
7261 type = declspecs->type;
7262 if (type == error_mark_node)
7265 type_was_error_mark_node = true;
7267 /* If the entire declaration is itself tagged as deprecated then
7268 suppress reports of deprecated items. */
7269 if (type && TREE_DEPRECATED (type)
7270 && deprecated_state != DEPRECATED_SUPPRESS)
7271 warn_deprecated_use (type);
7272 if (type && TREE_CODE (type) == TYPE_DECL)
7274 typedef_decl = type;
7275 type = TREE_TYPE (typedef_decl);
7277 /* No type at all: default to `int', and set DEFAULTED_INT
7278 because it was not a user-defined typedef. */
7279 if (type == NULL_TREE && (signed_p || unsigned_p || long_p || short_p))
7281 /* These imply 'int'. */
7282 type = integer_type_node;
7286 explicit_int = declspecs->explicit_int_p;
7287 explicit_char = declspecs->explicit_char_p;
7290 /* See the code below that used this. */
7292 decl_attr = DECL_ATTRIBUTES (typedef_decl);
7294 typedef_type = type;
7297 if (sfk != sfk_conversion)
7298 ctor_return_type = ctype;
7300 if (sfk != sfk_none)
7301 type = check_special_function_return_type (sfk, type,
7303 else if (type == NULL_TREE)
7309 /* We handle `main' specially here, because 'main () { }' is so
7310 common. With no options, it is allowed. With -Wreturn-type,
7311 it is a warning. It is only an error with -pedantic-errors. */
7312 is_main = (funcdef_flag
7313 && dname && MAIN_NAME_P (dname)
7314 && ctype == NULL_TREE
7315 && in_namespace == NULL_TREE
7316 && current_namespace == global_namespace);
7318 if (type_was_error_mark_node)
7319 /* We've already issued an error, don't complain more. */;
7320 else if (in_system_header || flag_ms_extensions)
7321 /* Allow it, sigh. */;
7322 else if (pedantic || ! is_main)
7323 pedwarn ("ISO C++ forbids declaration of %qs with no type", name);
7324 else if (warn_return_type)
7325 warning (0, "ISO C++ forbids declaration of %qs with no type", name);
7327 type = integer_type_node;
7332 /* Now process the modifiers that were specified
7333 and check for invalid combinations. */
7335 /* Long double is a special combination. */
7336 if (long_p && !longlong && TYPE_MAIN_VARIANT (type) == double_type_node)
7339 type = build_qualified_type (long_double_type_node,
7340 cp_type_quals (type));
7343 /* Check all other uses of type modifiers. */
7345 if (unsigned_p || signed_p || long_p || short_p)
7349 if ((signed_p || unsigned_p) && TREE_CODE (type) != INTEGER_TYPE)
7350 error ("%<signed%> or %<unsigned%> invalid for %qs", name);
7351 else if (signed_p && unsigned_p)
7352 error ("%<signed%> and %<unsigned%> specified together for %qs", name);
7353 else if (longlong && TREE_CODE (type) != INTEGER_TYPE)
7354 error ("%<long long%> invalid for %qs", name);
7355 else if (long_p && TREE_CODE (type) == REAL_TYPE)
7356 error ("%<long%> invalid for %qs", name);
7357 else if (short_p && TREE_CODE (type) == REAL_TYPE)
7358 error ("%<short%> invalid for %qs", name);
7359 else if ((long_p || short_p) && TREE_CODE (type) != INTEGER_TYPE)
7360 error ("%<long%> or %<short%> invalid for %qs", name);
7361 else if ((long_p || short_p) && explicit_char)
7362 error ("%<long%> or %<short%> specified with char for %qs", name);
7363 else if (long_p && short_p)
7364 error ("%<long%> and %<short%> specified together for %qs", name);
7368 if (!explicit_int && !defaulted_int && !explicit_char && pedantic)
7370 pedwarn ("long, short, signed or unsigned used invalidly for %qs",
7372 if (flag_pedantic_errors)
7377 /* Discard the type modifiers if they are invalid. */
7388 /* Decide whether an integer type is signed or not.
7389 Optionally treat bitfields as signed by default. */
7393 It is implementation-defined whether a plain (neither
7394 explicitly signed or unsigned) char, short, int, or long
7395 bit-field is signed or unsigned.
7397 Naturally, we extend this to long long as well. Note that
7398 this does not include wchar_t. */
7399 || (bitfield && !flag_signed_bitfields
7401 /* A typedef for plain `int' without `signed' can be
7402 controlled just like plain `int', but a typedef for
7403 `signed int' cannot be so controlled. */
7405 && C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl))
7406 && TREE_CODE (type) == INTEGER_TYPE
7407 && !same_type_p (TYPE_MAIN_VARIANT (type), wchar_type_node)))
7410 type = long_long_unsigned_type_node;
7412 type = long_unsigned_type_node;
7414 type = short_unsigned_type_node;
7415 else if (type == char_type_node)
7416 type = unsigned_char_type_node;
7417 else if (typedef_decl)
7418 type = c_common_unsigned_type (type);
7420 type = unsigned_type_node;
7422 else if (signed_p && type == char_type_node)
7423 type = signed_char_type_node;
7425 type = long_long_integer_type_node;
7427 type = long_integer_type_node;
7429 type = short_integer_type_node;
7431 if (declspecs->specs[(int)ds_complex])
7433 if (TREE_CODE (type) != INTEGER_TYPE && TREE_CODE (type) != REAL_TYPE)
7434 error ("complex invalid for %qs", name);
7435 /* If we just have "complex", it is equivalent to
7436 "complex double", but if any modifiers at all are specified it is
7437 the complex form of TYPE. E.g, "complex short" is
7438 "complex short int". */
7440 else if (defaulted_int && ! longlong
7441 && ! (long_p || short_p || signed_p || unsigned_p))
7442 type = complex_double_type_node;
7443 else if (type == integer_type_node)
7444 type = complex_integer_type_node;
7445 else if (type == float_type_node)
7446 type = complex_float_type_node;
7447 else if (type == double_type_node)
7448 type = complex_double_type_node;
7449 else if (type == long_double_type_node)
7450 type = complex_long_double_type_node;
7452 type = build_complex_type (type);
7455 type_quals = TYPE_UNQUALIFIED;
7456 if (declspecs->specs[(int)ds_const])
7457 type_quals |= TYPE_QUAL_CONST;
7458 if (declspecs->specs[(int)ds_volatile])
7459 type_quals |= TYPE_QUAL_VOLATILE;
7460 if (declspecs->specs[(int)ds_restrict])
7461 type_quals |= TYPE_QUAL_RESTRICT;
7462 if (sfk == sfk_conversion && type_quals != TYPE_UNQUALIFIED)
7463 error ("qualifiers are not allowed on declaration of %<operator %T%>",
7466 if (TREE_CODE (type) == FUNCTION_TYPE
7467 && type_quals != TYPE_UNQUALIFIED)
7469 /* This was an error in C++98 (cv-qualifiers cannot be added to
7470 a function type), but DR 295 makes the code well-formed by
7471 dropping the extra qualifiers. */
7474 tree bad_type = build_qualified_type (type, type_quals);
7475 pedwarn ("ignoring %qV qualifiers added to function type %qT",
7478 type_quals = TYPE_UNQUALIFIED;
7480 type_quals |= cp_type_quals (type);
7481 type = cp_build_qualified_type_real
7482 (type, type_quals, ((typedef_decl && !DECL_ARTIFICIAL (typedef_decl)
7483 ? tf_ignore_bad_quals : 0) | tf_warning_or_error));
7484 /* We might have ignored or rejected some of the qualifiers. */
7485 type_quals = cp_type_quals (type);
7488 inlinep = !! declspecs->specs[(int)ds_inline];
7489 virtualp = !! declspecs->specs[(int)ds_virtual];
7490 explicitp = !! declspecs->specs[(int)ds_explicit];
7492 storage_class = declspecs->storage_class;
7493 if (storage_class == sc_static)
7494 staticp = 1 + (decl_context == FIELD);
7496 if (virtualp && staticp == 2)
7498 error ("member %qD cannot be declared both virtual and static", dname);
7499 storage_class = sc_none;
7502 friendp = !! declspecs->specs[(int)ds_friend];
7504 if (dependent_name && !friendp)
7506 error ("%<%T::%D%> is not a valid declarator", ctype, dependent_name);
7507 return error_mark_node;
7510 /* Issue errors about use of storage classes for parameters. */
7511 if (decl_context == PARM)
7513 if (declspecs->specs[(int)ds_typedef])
7515 error ("typedef declaration invalid in parameter declaration");
7516 return error_mark_node;
7518 else if (storage_class == sc_static
7519 || storage_class == sc_extern
7521 error ("storage class specifiers invalid in parameter declarations");
7524 /* Give error if `virtual' is used outside of class declaration. */
7526 && (current_class_name == NULL_TREE || decl_context != FIELD))
7528 error ("virtual outside class declaration");
7532 /* Static anonymous unions are dealt with here. */
7533 if (staticp && decl_context == TYPENAME
7535 && ANON_AGGR_TYPE_P (declspecs->type))
7536 decl_context = FIELD;
7538 /* Warn about storage classes that are invalid for certain
7539 kinds of declarations (parameters, typenames, etc.). */
7542 && storage_class != sc_extern
7543 && storage_class != sc_static)
7544 || declspecs->specs[(int)ds_typedef]))
7546 error ("multiple storage classes in declaration of %qs", name);
7549 if (declspecs->conflicting_specifiers_p)
7551 error ("conflicting specifiers in declaration of %qs", name);
7552 storage_class = sc_none;
7554 else if (decl_context != NORMAL
7555 && ((storage_class != sc_none
7556 && storage_class != sc_mutable)
7559 if ((decl_context == PARM || decl_context == CATCHPARM)
7560 && (storage_class == sc_register
7561 || storage_class == sc_auto))
7563 else if (declspecs->specs[(int)ds_typedef])
7565 else if (decl_context == FIELD
7566 /* C++ allows static class elements. */
7567 && storage_class == sc_static)
7568 /* C++ also allows inlines and signed and unsigned elements,
7569 but in those cases we don't come in here. */
7573 if (decl_context == FIELD)
7574 error ("storage class specified for %qs", name);
7577 if (decl_context == PARM || decl_context == CATCHPARM)
7578 error ("storage class specified for parameter %qs", name);
7580 error ("storage class specified for typename");
7582 if (storage_class == sc_register
7583 || storage_class == sc_auto
7584 || storage_class == sc_extern
7586 storage_class = sc_none;
7589 else if (storage_class == sc_extern && initialized
7592 if (toplevel_bindings_p ())
7594 /* It's common practice (and completely valid) to have a const
7595 be initialized and declared extern. */
7596 if (!(type_quals & TYPE_QUAL_CONST))
7597 warning (0, "%qs initialized and declared %<extern%>", name);
7600 error ("%qs has both %<extern%> and initializer", name);
7602 else if (storage_class == sc_extern && funcdef_flag
7603 && ! toplevel_bindings_p ())
7604 error ("nested function %qs declared %<extern%>", name);
7605 else if (toplevel_bindings_p ())
7607 if (storage_class == sc_auto)
7608 error ("top-level declaration of %qs specifies %<auto%>", name);
7611 && storage_class != sc_extern
7612 && storage_class != sc_static)
7614 error ("function-scope %qs implicitly auto and declared %<__thread%>",
7619 if (storage_class && friendp)
7620 error ("storage class specifiers invalid in friend function declarations");
7623 unqualified_id = NULL_TREE;
7626 unqualified_id = id_declarator->u.id.unqualified_name;
7627 switch (TREE_CODE (unqualified_id))
7631 = constructor_name (TREE_OPERAND (unqualified_id, 0));
7634 case IDENTIFIER_NODE:
7635 case TEMPLATE_ID_EXPR:
7643 /* Determine the type of the entity declared by recurring on the
7645 for (; declarator; declarator = declarator->declarator)
7647 const cp_declarator *inner_declarator;
7650 if (type == error_mark_node)
7651 return error_mark_node;
7653 attrs = declarator->attributes;
7659 if (declarator == NULL || declarator->kind == cdk_id)
7660 attr_flags |= (int) ATTR_FLAG_DECL_NEXT;
7661 if (declarator->kind == cdk_function)
7662 attr_flags |= (int) ATTR_FLAG_FUNCTION_NEXT;
7663 if (declarator->kind == cdk_array)
7664 attr_flags |= (int) ATTR_FLAG_ARRAY_NEXT;
7665 returned_attrs = decl_attributes (&type,
7666 chainon (returned_attrs, attrs),
7670 if (declarator->kind == cdk_id)
7673 inner_declarator = declarator->declarator;
7675 switch (declarator->kind)
7678 type = create_array_type_for_decl (dname, type,
7679 declarator->u.array.bounds);
7687 /* Declaring a function type.
7688 Make sure we have a valid type for the function to return. */
7690 /* We now know that the TYPE_QUALS don't apply to the
7691 decl, but to its return type. */
7692 type_quals = TYPE_UNQUALIFIED;
7694 /* Warn about some types functions can't return. */
7696 if (TREE_CODE (type) == FUNCTION_TYPE)
7698 error ("%qs declared as function returning a function", name);
7699 type = integer_type_node;
7701 if (TREE_CODE (type) == ARRAY_TYPE)
7703 error ("%qs declared as function returning an array", name);
7704 type = integer_type_node;
7707 /* Pick up type qualifiers which should be applied to `this'. */
7708 memfn_quals = declarator->u.function.qualifiers;
7710 /* Pick up the exception specifications. */
7711 raises = declarator->u.function.exception_specification;
7713 /* Say it's a definition only for the CALL_EXPR
7714 closest to the identifier. */
7715 funcdecl_p = inner_declarator && inner_declarator->kind == cdk_id;
7717 if (ctype == NULL_TREE
7718 && decl_context == FIELD
7720 && (friendp == 0 || dname == current_class_name))
7721 ctype = current_class_type;
7723 if (ctype && (sfk == sfk_constructor
7724 || sfk == sfk_destructor))
7726 /* We are within a class's scope. If our declarator name
7727 is the same as the class name, and we are defining
7728 a function, then it is a constructor/destructor, and
7729 therefore returns a void type. */
7731 /* ISO C++ 12.4/2. A destructor may not be declared
7732 const or volatile. A destructor may not be
7735 ISO C++ 12.1. A constructor may not be declared
7736 const or volatile. A constructor may not be
7737 virtual. A constructor may not be static. */
7739 error ((flags == DTOR_FLAG)
7740 ? "destructor cannot be static member function"
7741 : "constructor cannot be static member function");
7744 error ((flags == DTOR_FLAG)
7745 ? "destructors may not be cv-qualified"
7746 : "constructors may not be cv-qualified");
7747 memfn_quals = TYPE_UNQUALIFIED;
7750 if (decl_context == FIELD
7751 && !member_function_or_else (ctype,
7754 return error_mark_node;
7756 if (flags != DTOR_FLAG)
7758 /* It's a constructor. */
7763 pedwarn ("constructors cannot be declared virtual");
7766 if (decl_context == FIELD
7767 && sfk != sfk_constructor)
7768 return error_mark_node;
7770 if (decl_context == FIELD)
7776 error ("can't initialize friend function %qs", name);
7779 /* Cannot be both friend and virtual. */
7780 error ("virtual functions cannot be friends");
7783 if (decl_context == NORMAL)
7784 error ("friend declaration not in class definition");
7785 if (current_function_decl && funcdef_flag)
7786 error ("can't define friend function %qs in a local "
7791 arg_types = grokparms (declarator->u.function.parameters,
7794 if (inner_declarator
7795 && inner_declarator->kind == cdk_id
7796 && inner_declarator->u.id.sfk == sfk_destructor
7797 && arg_types != void_list_node)
7799 error ("destructors may not have parameters");
7800 arg_types = void_list_node;
7804 type = build_function_type (type, arg_types);
7811 /* Filter out pointers-to-references and references-to-references.
7812 We can get these if a TYPE_DECL is used. */
7814 if (TREE_CODE (type) == REFERENCE_TYPE)
7816 error (declarator->kind == cdk_reference
7817 ? "cannot declare reference to %q#T"
7818 : "cannot declare pointer to %q#T", type);
7819 type = TREE_TYPE (type);
7821 else if (VOID_TYPE_P (type))
7823 if (declarator->kind == cdk_reference)
7824 error ("cannot declare reference to %q#T", type);
7825 else if (declarator->kind == cdk_ptrmem)
7826 error ("cannot declare pointer to %q#T member", type);
7829 /* We now know that the TYPE_QUALS don't apply to the decl,
7830 but to the target of the pointer. */
7831 type_quals = TYPE_UNQUALIFIED;
7833 if (declarator->kind == cdk_ptrmem
7834 && (TREE_CODE (type) == FUNCTION_TYPE || memfn_quals))
7836 memfn_quals |= cp_type_quals (type);
7837 type = build_memfn_type (type,
7838 declarator->u.pointer.class_type,
7840 memfn_quals = TYPE_UNQUALIFIED;
7843 if (declarator->kind == cdk_reference)
7845 if (!VOID_TYPE_P (type))
7846 type = build_reference_type (type);
7848 else if (TREE_CODE (type) == METHOD_TYPE)
7849 type = build_ptrmemfunc_type (build_pointer_type (type));
7850 else if (declarator->kind == cdk_ptrmem)
7852 gcc_assert (TREE_CODE (declarator->u.pointer.class_type)
7854 if (declarator->u.pointer.class_type == error_mark_node)
7855 /* We will already have complained. */
7856 type = error_mark_node;
7858 type = build_ptrmem_type (declarator->u.pointer.class_type,
7862 type = build_pointer_type (type);
7864 /* Process a list of type modifier keywords (such as
7865 const or volatile) that were given inside the `*' or `&'. */
7867 if (declarator->u.pointer.qualifiers)
7870 = cp_build_qualified_type (type,
7871 declarator->u.pointer.qualifiers);
7872 type_quals = cp_type_quals (type);
7885 if (unqualified_id && TREE_CODE (unqualified_id) == TEMPLATE_ID_EXPR
7886 && TREE_CODE (type) != FUNCTION_TYPE
7887 && TREE_CODE (type) != METHOD_TYPE)
7889 error ("template-id %qD used as a declarator",
7891 unqualified_id = dname;
7894 /* If TYPE is a FUNCTION_TYPE, but the function name was explicitly
7895 qualified with a class-name, turn it into a METHOD_TYPE, unless
7896 we know that the function is static. We take advantage of this
7897 opportunity to do other processing that pertains to entities
7898 explicitly declared to be class members. Note that if DECLARATOR
7899 is non-NULL, we know it is a cdk_id declarator; otherwise, we
7900 would not have exited the loop above. */
7902 && declarator->u.id.qualifying_scope
7903 && TYPE_P (declarator->u.id.qualifying_scope))
7907 ctype = declarator->u.id.qualifying_scope;
7908 ctype = TYPE_MAIN_VARIANT (ctype);
7910 while (t != NULL_TREE && CLASS_TYPE_P (t))
7912 /* You're supposed to have one `template <...>' for every
7913 template class, but you don't need one for a full
7914 specialization. For example:
7916 template <class T> struct S{};
7917 template <> struct S<int> { void f(); };
7918 void S<int>::f () {}
7920 is correct; there shouldn't be a `template <>' for the
7921 definition of `S<int>::f'. */
7922 if (CLASSTYPE_TEMPLATE_SPECIALIZATION (t)
7923 && !any_dependent_template_arguments_p (CLASSTYPE_TI_ARGS (t)))
7924 /* T is an explicit (not partial) specialization. All
7925 containing classes must therefore also be explicitly
7928 if ((CLASSTYPE_USE_TEMPLATE (t) || CLASSTYPE_IS_TEMPLATE (t))
7929 && PRIMARY_TEMPLATE_P (CLASSTYPE_TI_TEMPLATE (t)))
7930 template_count += 1;
7932 t = TYPE_MAIN_DECL (t);
7933 t = DECL_CONTEXT (t);
7936 if (ctype == current_class_type)
7939 pedwarn ("member functions are implicitly friends of their class");
7941 pedwarn ("extra qualification %<%T::%> on member %qs",
7944 else if (/* If the qualifying type is already complete, then we
7945 can skip the following checks. */
7946 !COMPLETE_TYPE_P (ctype)
7947 && (/* If the function is being defined, then
7948 qualifying type must certainly be complete. */
7950 /* A friend declaration of "T::f" is OK, even if
7951 "T" is a template parameter. But, if this
7952 function is not a friend, the qualifying type
7954 || (!friendp && !CLASS_TYPE_P (ctype))
7955 /* For a declaration, the type need not be
7956 complete, if either it is dependent (since there
7957 is no meaningful definition of complete in that
7958 case) or the qualifying class is currently being
7960 || !(dependent_type_p (ctype)
7961 || currently_open_class (ctype)))
7962 /* Check that the qualifying type is complete. */
7963 && !complete_type_or_else (ctype, NULL_TREE))
7964 return error_mark_node;
7965 else if (TREE_CODE (type) == FUNCTION_TYPE)
7967 tree sname = declarator->u.id.unqualified_name;
7969 if (current_class_type
7970 && (!friendp || funcdef_flag))
7973 ? "cannot define member function %<%T::%s%> within %<%T%>"
7974 : "cannot declare member function %<%T::%s%> within %<%T%>",
7975 ctype, name, current_class_type);
7976 return error_mark_node;
7979 if (TREE_CODE (sname) == IDENTIFIER_NODE
7980 && NEW_DELETE_OPNAME_P (sname))
7981 /* Overloaded operator new and operator delete
7982 are always static functions. */
7985 type = build_memfn_type (type, ctype, memfn_quals);
7987 else if (declspecs->specs[(int)ds_typedef]
7988 && current_class_type)
7990 error ("cannot declare member %<%T::%s%> within %qT",
7991 ctype, name, current_class_type);
7992 return error_mark_node;
7996 /* Now TYPE has the actual type. */
8001 *attrlist = chainon (returned_attrs, *attrlist);
8003 attrlist = &returned_attrs;
8006 /* Did array size calculations overflow? */
8008 if (TREE_CODE (type) == ARRAY_TYPE
8009 && COMPLETE_TYPE_P (type)
8010 && TREE_CODE (TYPE_SIZE_UNIT (type)) == INTEGER_CST
8011 && TREE_OVERFLOW (TYPE_SIZE_UNIT (type)))
8013 error ("size of array %qs is too large", name);
8014 /* If we proceed with the array type as it is, we'll eventually
8015 crash in tree_low_cst(). */
8016 type = error_mark_node;
8019 if ((decl_context == FIELD || decl_context == PARM)
8020 && !processing_template_decl
8021 && variably_modified_type_p (type, NULL_TREE))
8023 if (decl_context == FIELD)
8024 error ("data member may not have variably modified type %qT", type);
8026 error ("parameter may not have variably modified type %qT", type);
8027 type = error_mark_node;
8030 if (explicitp == 1 || (explicitp && friendp))
8032 /* [dcl.fct.spec] The explicit specifier shall only be used in
8033 declarations of constructors within a class definition. */
8034 error ("only declarations of constructors can be %<explicit%>");
8038 if (storage_class == sc_mutable)
8040 if (decl_context != FIELD || friendp)
8042 error ("non-member %qs cannot be declared %<mutable%>", name);
8043 storage_class = sc_none;
8045 else if (decl_context == TYPENAME || declspecs->specs[(int)ds_typedef])
8047 error ("non-object member %qs cannot be declared %<mutable%>", name);
8048 storage_class = sc_none;
8050 else if (TREE_CODE (type) == FUNCTION_TYPE
8051 || TREE_CODE (type) == METHOD_TYPE)
8053 error ("function %qs cannot be declared %<mutable%>", name);
8054 storage_class = sc_none;
8058 error ("static %qs cannot be declared %<mutable%>", name);
8059 storage_class = sc_none;
8061 else if (type_quals & TYPE_QUAL_CONST)
8063 error ("const %qs cannot be declared %<mutable%>", name);
8064 storage_class = sc_none;
8068 /* If this is declaring a typedef name, return a TYPE_DECL. */
8069 if (declspecs->specs[(int)ds_typedef] && decl_context != TYPENAME)
8073 /* Note that the grammar rejects storage classes
8074 in typenames, fields or parameters. */
8075 if (current_lang_name == lang_name_java)
8076 TYPE_FOR_JAVA (type) = 1;
8078 /* This declaration:
8080 typedef void f(int) const;
8082 declares a function type which is not a member of any
8083 particular class, but which is cv-qualified; for
8084 example "f S::*" declares a pointer to a const-qualified
8085 member function of S. We record the cv-qualification in the
8087 if (memfn_quals && TREE_CODE (type) == FUNCTION_TYPE)
8088 type = cp_build_qualified_type (type, memfn_quals);
8090 if (decl_context == FIELD)
8091 decl = build_lang_decl (TYPE_DECL, unqualified_id, type);
8093 decl = build_decl (TYPE_DECL, unqualified_id, type);
8094 if (id_declarator && declarator->u.id.qualifying_scope)
8095 error ("%Jtypedef name may not be a nested-name-specifier", decl);
8097 if (decl_context != FIELD)
8099 if (!current_function_decl)
8100 DECL_CONTEXT (decl) = FROB_CONTEXT (current_namespace);
8101 else if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (current_function_decl)
8102 || (DECL_MAYBE_IN_CHARGE_DESTRUCTOR_P
8103 (current_function_decl)))
8104 /* The TYPE_DECL is "abstract" because there will be
8105 clones of this constructor/destructor, and there will
8106 be copies of this TYPE_DECL generated in those
8108 DECL_ABSTRACT (decl) = 1;
8110 else if (constructor_name_p (unqualified_id, current_class_type))
8111 pedwarn ("ISO C++ forbids nested type %qD with same name "
8112 "as enclosing class",
8115 /* If the user declares "typedef struct {...} foo" then the
8116 struct will have an anonymous name. Fill that name in now.
8117 Nothing can refer to it, so nothing needs know about the name
8119 if (type != error_mark_node
8122 && TREE_CODE (TYPE_NAME (type)) == TYPE_DECL
8123 && TYPE_ANONYMOUS_P (type)
8124 /* Don't do this if there are attributes. */
8125 && (!attrlist || !*attrlist)
8126 && cp_type_quals (type) == TYPE_UNQUALIFIED)
8128 tree oldname = TYPE_NAME (type);
8131 /* Replace the anonymous name with the real name everywhere. */
8132 for (t = TYPE_MAIN_VARIANT (type); t; t = TYPE_NEXT_VARIANT (t))
8133 if (TYPE_NAME (t) == oldname)
8134 TYPE_NAME (t) = decl;
8136 if (TYPE_LANG_SPECIFIC (type))
8137 TYPE_WAS_ANONYMOUS (type) = 1;
8139 /* If this is a typedef within a template class, the nested
8140 type is a (non-primary) template. The name for the
8141 template needs updating as well. */
8142 if (TYPE_LANG_SPECIFIC (type) && CLASSTYPE_TEMPLATE_INFO (type))
8143 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type))
8144 = TYPE_IDENTIFIER (type);
8146 /* FIXME remangle member functions; member functions of a
8147 type with external linkage have external linkage. */
8150 /* Any qualifiers on a function type typedef have already been
8152 if (memfn_quals && !ctype && TREE_CODE (type) == FUNCTION_TYPE)
8153 memfn_quals = TYPE_UNQUALIFIED;
8156 || (typedef_decl && C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl)))
8157 C_TYPEDEF_EXPLICITLY_SIGNED (decl) = 1;
8159 bad_specifiers (decl, "type", virtualp,
8160 memfn_quals != TYPE_UNQUALIFIED,
8161 inlinep, friendp, raises != NULL_TREE);
8166 /* Detect the case of an array type of unspecified size
8167 which came, as such, direct from a typedef name.
8168 We must copy the type, so that the array's domain can be
8169 individually set by the object's initializer. */
8171 if (type && typedef_type
8172 && TREE_CODE (type) == ARRAY_TYPE && !TYPE_DOMAIN (type)
8173 && TYPE_MAIN_VARIANT (type) == TYPE_MAIN_VARIANT (typedef_type))
8174 type = build_cplus_array_type (TREE_TYPE (type), NULL_TREE);
8176 /* Detect where we're using a typedef of function type to declare a
8177 function. PARMS will not be set, so we must create it now. */
8179 if (type == typedef_type && TREE_CODE (type) == FUNCTION_TYPE)
8181 tree decls = NULL_TREE;
8184 for (args = TYPE_ARG_TYPES (type); args; args = TREE_CHAIN (args))
8186 tree decl = cp_build_parm_decl (NULL_TREE, TREE_VALUE (args));
8188 TREE_CHAIN (decl) = decls;
8192 parms = nreverse (decls);
8194 if (decl_context != TYPENAME)
8196 /* A cv-qualifier-seq shall only be part of the function type
8197 for a non-static member function. [8.3.5/4 dcl.fct] */
8198 if (cp_type_quals (type) != TYPE_UNQUALIFIED
8199 && (current_class_type == NULL_TREE || staticp) )
8201 error ("qualified function types cannot be used to declare %s functions",
8202 (staticp? "static member" : "free"));
8203 type = TYPE_MAIN_VARIANT (type);
8206 /* The qualifiers on the function type become the qualifiers on
8207 the non-static member function. */
8208 memfn_quals |= cp_type_quals (type);
8212 /* If this is a type name (such as, in a cast or sizeof),
8213 compute the type and return it now. */
8215 if (decl_context == TYPENAME)
8217 /* Note that the grammar rejects storage classes
8218 in typenames, fields or parameters. */
8219 if (type_quals != TYPE_UNQUALIFIED)
8220 type_quals = TYPE_UNQUALIFIED;
8222 /* Special case: "friend class foo" looks like a TYPENAME context. */
8225 if (type_quals != TYPE_UNQUALIFIED)
8227 error ("type qualifiers specified for friend class declaration");
8228 type_quals = TYPE_UNQUALIFIED;
8232 error ("%<inline%> specified for friend class declaration");
8238 /* Don't allow friend declaration without a class-key. */
8239 if (TREE_CODE (type) == TEMPLATE_TYPE_PARM)
8240 pedwarn ("template parameters cannot be friends");
8241 else if (TREE_CODE (type) == TYPENAME_TYPE)
8242 pedwarn ("friend declaration requires class-key, "
8243 "i.e. %<friend class %T::%D%>",
8244 TYPE_CONTEXT (type), TYPENAME_TYPE_FULLNAME (type));
8246 pedwarn ("friend declaration requires class-key, "
8247 "i.e. %<friend %#T%>",
8251 /* Only try to do this stuff if we didn't already give up. */
8252 if (type != integer_type_node)
8254 /* A friendly class? */
8255 if (current_class_type)
8256 make_friend_class (current_class_type, TYPE_MAIN_VARIANT (type),
8259 error ("trying to make class %qT a friend of global scope",
8262 type = void_type_node;
8265 else if (memfn_quals)
8267 if (ctype == NULL_TREE)
8269 if (TREE_CODE (type) != METHOD_TYPE)
8270 error ("invalid qualifiers on non-member function type");
8272 ctype = TYPE_METHOD_BASETYPE (type);
8275 type = build_memfn_type (type, ctype, memfn_quals);
8280 else if (unqualified_id == NULL_TREE && decl_context != PARM
8281 && decl_context != CATCHPARM
8282 && TREE_CODE (type) != UNION_TYPE
8285 error ("abstract declarator %qT used as declaration", type);
8286 return error_mark_node;
8289 /* Only functions may be declared using an operator-function-id. */
8291 && IDENTIFIER_OPNAME_P (unqualified_id)
8292 && TREE_CODE (type) != FUNCTION_TYPE
8293 && TREE_CODE (type) != METHOD_TYPE)
8295 error ("declaration of %qD as non-function", unqualified_id);
8296 return error_mark_node;
8299 /* We don't check parameter types here because we can emit a better
8300 error message later. */
8301 if (decl_context != PARM)
8303 type = check_var_type (unqualified_id, type);
8304 if (type == error_mark_node)
8305 return error_mark_node;
8308 /* Now create the decl, which may be a VAR_DECL, a PARM_DECL
8309 or a FUNCTION_DECL, depending on DECL_CONTEXT and TYPE. */
8311 if (decl_context == PARM || decl_context == CATCHPARM)
8313 if (ctype || in_namespace)
8314 error ("cannot use %<::%> in parameter declaration");
8316 /* A parameter declared as an array of T is really a pointer to T.
8317 One declared as a function is really a pointer to a function.
8318 One declared as a member is really a pointer to member. */
8320 if (TREE_CODE (type) == ARRAY_TYPE)
8322 /* Transfer const-ness of array into that of type pointed to. */
8323 type = build_pointer_type (TREE_TYPE (type));
8324 type_quals = TYPE_UNQUALIFIED;
8326 else if (TREE_CODE (type) == FUNCTION_TYPE)
8327 type = build_pointer_type (type);
8333 if (decl_context == PARM)
8335 decl = cp_build_parm_decl (unqualified_id, type);
8337 bad_specifiers (decl, "parameter", virtualp,
8338 memfn_quals != TYPE_UNQUALIFIED,
8339 inlinep, friendp, raises != NULL_TREE);
8341 else if (decl_context == FIELD)
8343 /* The C99 flexible array extension. */
8344 if (!staticp && TREE_CODE (type) == ARRAY_TYPE
8345 && TYPE_DOMAIN (type) == NULL_TREE)
8347 tree itype = compute_array_index_type (dname, integer_zero_node);
8348 type = build_cplus_array_type (TREE_TYPE (type), itype);
8351 if (type == error_mark_node)
8353 /* Happens when declaring arrays of sizes which
8354 are error_mark_node, for example. */
8357 else if (in_namespace && !friendp)
8359 /* Something like struct S { int N::j; }; */
8360 error ("invalid use of %<::%>");
8361 return error_mark_node;
8363 else if (TREE_CODE (type) == FUNCTION_TYPE)
8366 tree function_context;
8370 if (ctype == NULL_TREE)
8371 ctype = current_class_type;
8373 if (ctype == NULL_TREE)
8375 error ("can't make %qD into a method -- not in a class",
8377 return error_mark_node;
8380 /* ``A union may [ ... ] not [ have ] virtual functions.''
8382 if (virtualp && TREE_CODE (ctype) == UNION_TYPE)
8384 error ("function %qD declared virtual inside a union",
8386 return error_mark_node;
8389 if (NEW_DELETE_OPNAME_P (unqualified_id))
8393 error ("%qD cannot be declared virtual, since it "
8399 else if (staticp < 2)
8400 type = build_memfn_type (type, ctype, memfn_quals);
8403 /* Check that the name used for a destructor makes sense. */
8404 if (sfk == sfk_destructor)
8408 gcc_assert (friendp);
8409 error ("expected qualified name in friend declaration "
8410 "for destructor %qD",
8411 id_declarator->u.id.unqualified_name);
8412 return error_mark_node;
8415 if (!same_type_p (TREE_OPERAND
8416 (id_declarator->u.id.unqualified_name, 0),
8419 error ("declaration of %qD as member of %qT",
8420 id_declarator->u.id.unqualified_name, ctype);
8421 return error_mark_node;
8425 /* Tell grokfndecl if it needs to set TREE_PUBLIC on the node. */
8426 function_context = (ctype != NULL_TREE) ?
8427 decl_function_context (TYPE_MAIN_DECL (ctype)) : NULL_TREE;
8428 publicp = (! friendp || ! staticp)
8429 && function_context == NULL_TREE;
8430 decl = grokfndecl (ctype, type,
8431 TREE_CODE (unqualified_id) != TEMPLATE_ID_EXPR
8432 ? unqualified_id : dname,
8435 virtualp, flags, memfn_quals, raises,
8436 friendp ? -1 : 0, friendp, publicp, inlinep,
8438 funcdef_flag, template_count, in_namespace, attrlist);
8439 if (decl == NULL_TREE)
8440 return error_mark_node;
8442 /* This clobbers the attrs stored in `decl' from `attrlist'. */
8443 /* The decl and setting of decl_attr is also turned off. */
8444 decl = build_decl_attribute_variant (decl, decl_attr);
8447 /* [class.conv.ctor]
8449 A constructor declared without the function-specifier
8450 explicit that can be called with a single parameter
8451 specifies a conversion from the type of its first
8452 parameter to the type of its class. Such a constructor
8453 is called a converting constructor. */
8455 DECL_NONCONVERTING_P (decl) = 1;
8456 else if (DECL_CONSTRUCTOR_P (decl))
8458 /* The constructor can be called with exactly one
8459 parameter if there is at least one parameter, and
8460 any subsequent parameters have default arguments.
8461 Ignore any compiler-added parms. */
8462 tree arg_types = FUNCTION_FIRST_USER_PARMTYPE (decl);
8464 if (arg_types == void_list_node
8466 && TREE_CHAIN (arg_types)
8467 && TREE_CHAIN (arg_types) != void_list_node
8468 && !TREE_PURPOSE (TREE_CHAIN (arg_types))))
8469 DECL_NONCONVERTING_P (decl) = 1;
8472 else if (TREE_CODE (type) == METHOD_TYPE)
8474 /* We only get here for friend declarations of
8475 members of other classes. */
8476 /* All method decls are public, so tell grokfndecl to set
8477 TREE_PUBLIC, also. */
8478 decl = grokfndecl (ctype, type,
8479 TREE_CODE (unqualified_id) != TEMPLATE_ID_EXPR
8480 ? unqualified_id : dname,
8483 virtualp, flags, memfn_quals, raises,
8484 friendp ? -1 : 0, friendp, 1, 0, sfk,
8485 funcdef_flag, template_count, in_namespace,
8487 if (decl == NULL_TREE)
8488 return error_mark_node;
8490 else if (!staticp && !dependent_type_p (type)
8491 && !COMPLETE_TYPE_P (complete_type (type))
8492 && (TREE_CODE (type) != ARRAY_TYPE || initialized == 0))
8495 error ("field %qD has incomplete type", unqualified_id);
8497 error ("name %qT has incomplete type", type);
8499 /* If we're instantiating a template, tell them which
8500 instantiation made the field's type be incomplete. */
8501 if (current_class_type
8502 && TYPE_NAME (current_class_type)
8503 && IDENTIFIER_TEMPLATE (TYPE_IDENTIFIER (current_class_type))
8505 && declspecs->type == type)
8506 error (" in instantiation of template %qT",
8507 current_class_type);
8509 return error_mark_node;
8515 error ("%qE is neither function nor member function; "
8516 "cannot be declared friend", unqualified_id);
8524 /* Friends are treated specially. */
8525 if (ctype == current_class_type)
8526 ; /* We already issued a pedwarn. */
8527 else if (decl && DECL_NAME (decl))
8529 if (template_class_depth (current_class_type) == 0)
8531 decl = check_explicit_specialization
8532 (unqualified_id, decl, template_count,
8533 2 * funcdef_flag + 4);
8534 if (decl == error_mark_node)
8535 return error_mark_node;
8538 decl = do_friend (ctype, unqualified_id, decl,
8544 return error_mark_node;
8547 /* Structure field. It may not be a function, except for C++. */
8549 if (decl == NULL_TREE)
8555 /* An attempt is being made to initialize a non-static
8556 member. But, from [class.mem]:
8558 4 A member-declarator can contain a
8559 constant-initializer only if it declares a static
8560 member (_class.static_) of integral or enumeration
8561 type, see _class.static.data_.
8563 This used to be relatively common practice, but
8564 the rest of the compiler does not correctly
8565 handle the initialization unless the member is
8566 static so we make it static below. */
8567 pedwarn ("ISO C++ forbids initialization of member %qD",
8569 pedwarn ("making %qD static", unqualified_id);
8573 if (uses_template_parms (type))
8574 /* We'll check at instantiation time. */
8576 else if (check_static_variable_definition (unqualified_id,
8578 /* If we just return the declaration, crashes
8579 will sometimes occur. We therefore return
8580 void_type_node, as if this was a friend
8581 declaration, to cause callers to completely
8582 ignore this declaration. */
8583 return error_mark_node;
8588 /* C++ allows static class members. All other work
8589 for this is done by grokfield. */
8590 decl = build_lang_decl (VAR_DECL, unqualified_id, type);
8591 set_linkage_for_static_data_member (decl);
8592 /* Even if there is an in-class initialization, DECL
8593 is considered undefined until an out-of-class
8594 definition is provided. */
8595 DECL_EXTERNAL (decl) = 1;
8599 if (targetm.have_tls)
8600 DECL_TLS_MODEL (decl) = decl_default_tls_model (decl);
8602 /* A mere warning is sure to result in improper
8603 semantics at runtime. Don't bother to allow this to
8605 error ("thread-local storage not supported for this target");
8610 decl = build_decl (FIELD_DECL, unqualified_id, type);
8611 DECL_NONADDRESSABLE_P (decl) = bitfield;
8612 if (storage_class == sc_mutable)
8614 DECL_MUTABLE_P (decl) = 1;
8615 storage_class = sc_none;
8619 bad_specifiers (decl, "field", virtualp,
8620 memfn_quals != TYPE_UNQUALIFIED,
8621 inlinep, friendp, raises != NULL_TREE);
8624 else if (TREE_CODE (type) == FUNCTION_TYPE
8625 || TREE_CODE (type) == METHOD_TYPE)
8630 if (!unqualified_id)
8631 return error_mark_node;
8633 if (TREE_CODE (unqualified_id) == TEMPLATE_ID_EXPR)
8634 original_name = dname;
8636 original_name = unqualified_id;
8638 if (storage_class == sc_auto)
8639 error ("storage class %<auto%> invalid for function %qs", name);
8640 else if (storage_class == sc_register)
8641 error ("storage class %<register%> invalid for function %qs", name);
8643 error ("storage class %<__thread%> invalid for function %qs", name);
8645 /* Function declaration not at top level.
8646 Storage classes other than `extern' are not allowed
8647 and `extern' makes no difference. */
8648 if (! toplevel_bindings_p ()
8649 && (storage_class == sc_static
8650 || declspecs->specs[(int)ds_inline])
8653 if (storage_class == sc_static)
8654 pedwarn ("%<static%> specified invalid for function %qs "
8655 "declared out of global scope", name);
8657 pedwarn ("%<inline%> specifier invalid for function %qs "
8658 "declared out of global scope", name);
8661 if (ctype == NULL_TREE)
8665 error ("virtual non-class function %qs", name);
8669 else if (TREE_CODE (type) == FUNCTION_TYPE && staticp < 2
8670 && !NEW_DELETE_OPNAME_P (original_name))
8671 type = build_method_type_directly (ctype,
8673 TYPE_ARG_TYPES (type));
8675 /* Record presence of `static'. */
8676 publicp = (ctype != NULL_TREE
8677 || storage_class == sc_extern
8678 || storage_class != sc_static);
8680 decl = grokfndecl (ctype, type, original_name, parms, unqualified_id,
8681 virtualp, flags, memfn_quals, raises,
8683 publicp, inlinep, sfk, funcdef_flag,
8684 template_count, in_namespace, attrlist);
8685 if (decl == NULL_TREE)
8686 return error_mark_node;
8690 int invalid_static = 0;
8692 /* Don't allow a static member function in a class, and forbid
8693 declaring main to be static. */
8694 if (TREE_CODE (type) == METHOD_TYPE)
8696 pedwarn ("cannot declare member function %qD to have "
8697 "static linkage", decl);
8700 else if (current_function_decl)
8702 /* FIXME need arm citation */
8703 error ("cannot declare static function inside another function");
8710 storage_class = sc_none;
8716 /* It's a variable. */
8718 /* An uninitialized decl with `extern' is a reference. */
8719 decl = grokvardecl (type, unqualified_id,
8722 (type_quals & TYPE_QUAL_CONST) != 0,
8723 ctype ? ctype : in_namespace);
8724 bad_specifiers (decl, "variable", virtualp,
8725 memfn_quals != TYPE_UNQUALIFIED,
8726 inlinep, friendp, raises != NULL_TREE);
8730 DECL_CONTEXT (decl) = ctype;
8733 pedwarn ("%<static%> may not be used when defining "
8734 "(as opposed to declaring) a static data member");
8736 storage_class = sc_none;
8738 if (storage_class == sc_register && TREE_STATIC (decl))
8740 error ("static member %qD declared %<register%>", decl);
8741 storage_class = sc_none;
8743 if (storage_class == sc_extern && pedantic)
8745 pedwarn ("cannot explicitly declare member %q#D to have "
8748 storage_class = sc_none;
8753 /* Record `register' declaration for warnings on &
8754 and in case doing stupid register allocation. */
8756 if (storage_class == sc_register)
8757 DECL_REGISTER (decl) = 1;
8758 else if (storage_class == sc_extern)
8759 DECL_THIS_EXTERN (decl) = 1;
8760 else if (storage_class == sc_static)
8761 DECL_THIS_STATIC (decl) = 1;
8763 /* Record constancy and volatility. There's no need to do this
8764 when processing a template; we'll do this for the instantiated
8765 declaration based on the type of DECL. */
8766 if (!processing_template_decl)
8767 cp_apply_type_quals_to_decl (type_quals, decl);
8773 /* Subroutine of start_function. Ensure that each of the parameter
8774 types (as listed in PARMS) is complete, as is required for a
8775 function definition. */
8778 require_complete_types_for_parms (tree parms)
8780 for (; parms; parms = TREE_CHAIN (parms))
8782 if (dependent_type_p (TREE_TYPE (parms)))
8784 if (!VOID_TYPE_P (TREE_TYPE (parms))
8785 && complete_type_or_else (TREE_TYPE (parms), parms))
8787 relayout_decl (parms);
8788 DECL_ARG_TYPE (parms) = type_passed_as (TREE_TYPE (parms));
8791 /* grokparms or complete_type_or_else will have already issued
8793 TREE_TYPE (parms) = error_mark_node;
8797 /* Returns nonzero if T is a local variable. */
8800 local_variable_p (tree t)
8802 if ((TREE_CODE (t) == VAR_DECL
8803 /* A VAR_DECL with a context that is a _TYPE is a static data
8805 && !TYPE_P (CP_DECL_CONTEXT (t))
8806 /* Any other non-local variable must be at namespace scope. */
8807 && !DECL_NAMESPACE_SCOPE_P (t))
8808 || (TREE_CODE (t) == PARM_DECL))
8814 /* Returns nonzero if T is an automatic local variable or a label.
8815 (These are the declarations that need to be remapped when the code
8816 containing them is duplicated.) */
8819 nonstatic_local_decl_p (tree t)
8821 return ((local_variable_p (t) && !TREE_STATIC (t))
8822 || TREE_CODE (t) == LABEL_DECL
8823 || TREE_CODE (t) == RESULT_DECL);
8826 /* Like local_variable_p, but suitable for use as a tree-walking
8830 local_variable_p_walkfn (tree *tp, int *walk_subtrees,
8831 void *data ATTRIBUTE_UNUSED)
8833 if (local_variable_p (*tp) && !DECL_ARTIFICIAL (*tp))
8835 else if (TYPE_P (*tp))
8842 /* Check that ARG, which is a default-argument expression for a
8843 parameter DECL, is valid. Returns ARG, or ERROR_MARK_NODE, if
8844 something goes wrong. DECL may also be a _TYPE node, rather than a
8845 DECL, if there is no DECL available. */
8848 check_default_argument (tree decl, tree arg)
8853 if (TREE_CODE (arg) == DEFAULT_ARG)
8854 /* We get a DEFAULT_ARG when looking at an in-class declaration
8855 with a default argument. Ignore the argument for now; we'll
8856 deal with it after the class is complete. */
8865 decl_type = TREE_TYPE (decl);
8867 if (arg == error_mark_node
8868 || decl == error_mark_node
8869 || TREE_TYPE (arg) == error_mark_node
8870 || decl_type == error_mark_node)
8871 /* Something already went wrong. There's no need to check
8873 return error_mark_node;
8875 /* [dcl.fct.default]
8877 A default argument expression is implicitly converted to the
8879 if (!TREE_TYPE (arg)
8880 || !can_convert_arg (decl_type, TREE_TYPE (arg), arg, LOOKUP_NORMAL))
8883 error ("default argument for %q#D has type %qT",
8884 decl, TREE_TYPE (arg));
8886 error ("default argument for parameter of type %qT has type %qT",
8887 decl_type, TREE_TYPE (arg));
8889 return error_mark_node;
8892 /* [dcl.fct.default]
8894 Local variables shall not be used in default argument
8897 The keyword `this' shall not be used in a default argument of a
8899 var = walk_tree_without_duplicates (&arg, local_variable_p_walkfn,
8903 error ("default argument %qE uses local variable %qD", arg, var);
8904 return error_mark_node;
8911 /* Decode the list of parameter types for a function type.
8912 Given the list of things declared inside the parens,
8913 return a list of types.
8915 If this parameter does not end with an ellipsis, we append
8918 *PARMS is set to the chain of PARM_DECLs created. */
8921 grokparms (cp_parameter_declarator *first_parm, tree *parms)
8923 tree result = NULL_TREE;
8924 tree decls = NULL_TREE;
8925 int ellipsis = !first_parm || first_parm->ellipsis_p;
8926 cp_parameter_declarator *parm;
8929 for (parm = first_parm; parm != NULL; parm = parm->next)
8931 tree type = NULL_TREE;
8932 tree init = parm->default_argument;
8936 if (parm == no_parameters)
8939 attrs = parm->decl_specifiers.attributes;
8940 parm->decl_specifiers.attributes = NULL_TREE;
8941 decl = grokdeclarator (parm->declarator, &parm->decl_specifiers,
8942 PARM, init != NULL_TREE, &attrs);
8943 if (! decl || TREE_TYPE (decl) == error_mark_node)
8947 cplus_decl_attributes (&decl, attrs, 0);
8949 type = TREE_TYPE (decl);
8950 if (VOID_TYPE_P (type))
8952 if (same_type_p (type, void_type_node)
8953 && DECL_SELF_REFERENCE_P (type)
8954 && !DECL_NAME (decl) && !result && !parm->next && !ellipsis)
8955 /* this is a parmlist of `(void)', which is ok. */
8957 cxx_incomplete_type_error (decl, type);
8958 /* It's not a good idea to actually create parameters of
8959 type `void'; other parts of the compiler assume that a
8960 void type terminates the parameter list. */
8961 type = error_mark_node;
8962 TREE_TYPE (decl) = error_mark_node;
8965 if (type != error_mark_node)
8967 /* Top-level qualifiers on the parameters are
8968 ignored for function types. */
8969 type = cp_build_qualified_type (type, 0);
8970 if (TREE_CODE (type) == METHOD_TYPE)
8972 error ("parameter %qD invalidly declared method type", decl);
8973 type = build_pointer_type (type);
8974 TREE_TYPE (decl) = type;
8976 else if (abstract_virtuals_error (decl, type))
8977 any_error = 1; /* Seems like a good idea. */
8978 else if (POINTER_TYPE_P (type))
8980 /* [dcl.fct]/6, parameter types cannot contain pointers
8981 (references) to arrays of unknown bound. */
8982 tree t = TREE_TYPE (type);
8983 int ptr = TYPE_PTR_P (type);
8989 else if (TREE_CODE (t) != ARRAY_TYPE)
8991 else if (!TYPE_DOMAIN (t))
8995 if (TREE_CODE (t) == ARRAY_TYPE)
8996 error ("parameter %qD includes %s to array of unknown "
8998 decl, ptr ? "pointer" : "reference", t);
9003 else if (init && !processing_template_decl)
9004 init = check_default_argument (decl, init);
9007 TREE_CHAIN (decl) = decls;
9009 result = tree_cons (init, type, result);
9011 decls = nreverse (decls);
9012 result = nreverse (result);
9014 result = chainon (result, void_list_node);
9021 /* D is a constructor or overloaded `operator='.
9023 Let T be the class in which D is declared. Then, this function
9026 -1 if D's is an ill-formed constructor or copy assignment operator
9027 whose first parameter is of type `T'.
9028 0 if D is not a copy constructor or copy assignment
9030 1 if D is a copy constructor or copy assignment operator whose
9031 first parameter is a reference to const qualified T.
9032 2 if D is a copy constructor or copy assignment operator whose
9033 first parameter is a reference to non-const qualified T.
9035 This function can be used as a predicate. Positive values indicate
9036 a copy constructor and nonzero values indicate a copy assignment
9046 gcc_assert (DECL_FUNCTION_MEMBER_P (d));
9048 if (TREE_CODE (d) == TEMPLATE_DECL
9049 || (DECL_TEMPLATE_INFO (d)
9050 && DECL_MEMBER_TEMPLATE_P (DECL_TI_TEMPLATE (d))))
9051 /* Instantiations of template member functions are never copy
9052 functions. Note that member functions of templated classes are
9053 represented as template functions internally, and we must
9054 accept those as copy functions. */
9057 args = FUNCTION_FIRST_USER_PARMTYPE (d);
9061 arg_type = TREE_VALUE (args);
9062 if (arg_type == error_mark_node)
9065 if (TYPE_MAIN_VARIANT (arg_type) == DECL_CONTEXT (d))
9067 /* Pass by value copy assignment operator. */
9070 else if (TREE_CODE (arg_type) == REFERENCE_TYPE
9071 && TYPE_MAIN_VARIANT (TREE_TYPE (arg_type)) == DECL_CONTEXT (d))
9073 if (CP_TYPE_CONST_P (TREE_TYPE (arg_type)))
9079 args = TREE_CHAIN (args);
9081 if (args && args != void_list_node && !TREE_PURPOSE (args))
9082 /* There are more non-optional args. */
9088 /* Remember any special properties of member function DECL. */
9090 void grok_special_member_properties (tree decl)
9094 if (!DECL_NONSTATIC_MEMBER_FUNCTION_P (decl))
9097 class_type = DECL_CONTEXT (decl);
9098 if (DECL_CONSTRUCTOR_P (decl))
9100 int ctor = copy_fn_p (decl);
9102 TYPE_HAS_CONSTRUCTOR (class_type) = 1;
9108 A non-template constructor for class X is a copy
9109 constructor if its first parameter is of type X&, const
9110 X&, volatile X& or const volatile X&, and either there
9111 are no other parameters or else all other parameters have
9112 default arguments. */
9113 TYPE_HAS_INIT_REF (class_type) = 1;
9115 TYPE_HAS_CONST_INIT_REF (class_type) = 1;
9117 else if (sufficient_parms_p (FUNCTION_FIRST_USER_PARMTYPE (decl)))
9118 TYPE_HAS_DEFAULT_CONSTRUCTOR (class_type) = 1;
9120 else if (DECL_OVERLOADED_OPERATOR_P (decl) == NOP_EXPR)
9124 A non-template assignment operator for class X is a copy
9125 assignment operator if its parameter is of type X, X&, const
9126 X&, volatile X& or const volatile X&. */
9128 int assop = copy_fn_p (decl);
9132 TYPE_HAS_ASSIGN_REF (class_type) = 1;
9134 TYPE_HAS_CONST_ASSIGN_REF (class_type) = 1;
9139 /* Check a constructor DECL has the correct form. Complains
9140 if the class has a constructor of the form X(X). */
9143 grok_ctor_properties (tree ctype, tree decl)
9145 int ctor_parm = copy_fn_p (decl);
9151 A declaration of a constructor for a class X is ill-formed if
9152 its first parameter is of type (optionally cv-qualified) X
9153 and either there are no other parameters or else all other
9154 parameters have default arguments.
9156 We *don't* complain about member template instantiations that
9157 have this form, though; they can occur as we try to decide
9158 what constructor to use during overload resolution. Since
9159 overload resolution will never prefer such a constructor to
9160 the non-template copy constructor (which is either explicitly
9161 or implicitly defined), there's no need to worry about their
9162 existence. Theoretically, they should never even be
9163 instantiated, but that's hard to forestall. */
9164 error ("invalid constructor; you probably meant %<%T (const %T&)%>",
9172 /* An operator with this code is unary, but can also be binary. */
9175 ambi_op_p (enum tree_code code)
9177 return (code == INDIRECT_REF
9178 || code == ADDR_EXPR
9179 || code == UNARY_PLUS_EXPR
9180 || code == NEGATE_EXPR
9181 || code == PREINCREMENT_EXPR
9182 || code == PREDECREMENT_EXPR);
9185 /* An operator with this name can only be unary. */
9188 unary_op_p (enum tree_code code)
9190 return (code == TRUTH_NOT_EXPR
9191 || code == BIT_NOT_EXPR
9192 || code == COMPONENT_REF
9193 || code == TYPE_EXPR);
9196 /* DECL is a declaration for an overloaded operator. If COMPLAIN is true,
9197 errors are issued for invalid declarations. */
9200 grok_op_properties (tree decl, bool complain)
9202 tree argtypes = TYPE_ARG_TYPES (TREE_TYPE (decl));
9204 int methodp = (TREE_CODE (TREE_TYPE (decl)) == METHOD_TYPE);
9205 tree name = DECL_NAME (decl);
9206 enum tree_code operator_code;
9211 /* Count the number of arguments and check for ellipsis. */
9212 for (argtype = argtypes, arity = 0;
9213 argtype && argtype != void_list_node;
9214 argtype = TREE_CHAIN (argtype))
9216 ellipsis_p = !argtype;
9218 class_type = DECL_CONTEXT (decl);
9219 if (class_type && !CLASS_TYPE_P (class_type))
9220 class_type = NULL_TREE;
9222 if (DECL_CONV_FN_P (decl))
9223 operator_code = TYPE_EXPR;
9227 #define DEF_OPERATOR(NAME, CODE, MANGLING, ARITY, ASSN_P) \
9228 if (ansi_opname (CODE) == name) \
9230 operator_code = (CODE); \
9233 else if (ansi_assopname (CODE) == name) \
9235 operator_code = (CODE); \
9236 DECL_ASSIGNMENT_OPERATOR_P (decl) = 1; \
9240 #include "operators.def"
9246 gcc_assert (operator_code != LAST_CPLUS_TREE_CODE);
9247 SET_OVERLOADED_OPERATOR_CODE (decl, operator_code);
9250 switch (operator_code)
9253 TYPE_HAS_NEW_OPERATOR (class_type) = 1;
9257 TYPE_GETS_DELETE (class_type) |= 1;
9261 TYPE_HAS_ARRAY_NEW_OPERATOR (class_type) = 1;
9264 case VEC_DELETE_EXPR:
9265 TYPE_GETS_DELETE (class_type) |= 2;
9272 /* [basic.std.dynamic.allocation]/1:
9274 A program is ill-formed if an allocation function is declared
9275 in a namespace scope other than global scope or declared static
9278 The same also holds true for deallocation functions. */
9279 if (operator_code == NEW_EXPR || operator_code == VEC_NEW_EXPR
9280 || operator_code == DELETE_EXPR || operator_code == VEC_DELETE_EXPR)
9282 if (DECL_NAMESPACE_SCOPE_P (decl))
9284 if (CP_DECL_CONTEXT (decl) != global_namespace)
9286 error ("%qD may not be declared within a namespace", decl);
9289 else if (!TREE_PUBLIC (decl))
9291 error ("%qD may not be declared as static", decl);
9297 if (operator_code == NEW_EXPR || operator_code == VEC_NEW_EXPR)
9298 TREE_TYPE (decl) = coerce_new_type (TREE_TYPE (decl));
9299 else if (operator_code == DELETE_EXPR || operator_code == VEC_DELETE_EXPR)
9300 TREE_TYPE (decl) = coerce_delete_type (TREE_TYPE (decl));
9303 /* An operator function must either be a non-static member function
9304 or have at least one parameter of a class, a reference to a class,
9305 an enumeration, or a reference to an enumeration. 13.4.0.6 */
9306 if (! methodp || DECL_STATIC_FUNCTION_P (decl))
9308 if (operator_code == TYPE_EXPR
9309 || operator_code == CALL_EXPR
9310 || operator_code == COMPONENT_REF
9311 || operator_code == ARRAY_REF
9312 || operator_code == NOP_EXPR)
9314 error ("%qD must be a nonstatic member function", decl);
9321 if (DECL_STATIC_FUNCTION_P (decl))
9323 error ("%qD must be either a non-static member "
9324 "function or a non-member function", decl);
9328 for (p = argtypes; p && p != void_list_node; p = TREE_CHAIN (p))
9330 tree arg = non_reference (TREE_VALUE (p));
9331 if (arg == error_mark_node)
9334 /* IS_AGGR_TYPE, rather than CLASS_TYPE_P, is used
9335 because these checks are performed even on
9336 template functions. */
9337 if (IS_AGGR_TYPE (arg) || TREE_CODE (arg) == ENUMERAL_TYPE)
9341 if (!p || p == void_list_node)
9344 error ("%qD must have an argument of class or "
9345 "enumerated type", decl);
9351 /* There are no restrictions on the arguments to an overloaded
9353 if (operator_code == CALL_EXPR)
9356 /* Warn about conversion operators that will never be used. */
9357 if (IDENTIFIER_TYPENAME_P (name)
9358 && ! DECL_TEMPLATE_INFO (decl)
9360 /* Warn only declaring the function; there is no need to
9361 warn again about out-of-class definitions. */
9362 && class_type == current_class_type)
9364 tree t = TREE_TYPE (name);
9365 int ref = (TREE_CODE (t) == REFERENCE_TYPE);
9366 const char *what = 0;
9369 t = TYPE_MAIN_VARIANT (TREE_TYPE (t));
9371 if (TREE_CODE (t) == VOID_TYPE)
9373 else if (class_type)
9375 if (t == class_type)
9376 what = "the same type";
9377 /* Don't force t to be complete here. */
9378 else if (IS_AGGR_TYPE (t)
9379 && COMPLETE_TYPE_P (t)
9380 && DERIVED_FROM_P (t, class_type))
9381 what = "a base class";
9385 warning (OPT_Wconversion, "conversion to %s%s will never use a type "
9386 "conversion operator",
9387 ref ? "a reference to " : "", what);
9390 if (operator_code == COND_EXPR)
9393 error ("ISO C++ prohibits overloading operator ?:");
9396 else if (ellipsis_p)
9398 error ("%qD must not have variable number of arguments", decl);
9401 else if (ambi_op_p (operator_code))
9404 /* We pick the one-argument operator codes by default, so
9405 we don't have to change anything. */
9407 else if (arity == 2)
9409 /* If we thought this was a unary operator, we now know
9410 it to be a binary operator. */
9411 switch (operator_code)
9414 operator_code = MULT_EXPR;
9418 operator_code = BIT_AND_EXPR;
9421 case UNARY_PLUS_EXPR:
9422 operator_code = PLUS_EXPR;
9426 operator_code = MINUS_EXPR;
9429 case PREINCREMENT_EXPR:
9430 operator_code = POSTINCREMENT_EXPR;
9433 case PREDECREMENT_EXPR:
9434 operator_code = POSTDECREMENT_EXPR;
9441 SET_OVERLOADED_OPERATOR_CODE (decl, operator_code);
9443 if ((operator_code == POSTINCREMENT_EXPR
9444 || operator_code == POSTDECREMENT_EXPR)
9445 && ! processing_template_decl
9446 && ! same_type_p (TREE_VALUE (TREE_CHAIN (argtypes)), integer_type_node))
9449 error ("postfix %qD must take %<int%> as its argument",
9452 error ("postfix %qD must take %<int%> as its second "
9460 error ("%qD must take either zero or one argument", decl);
9462 error ("%qD must take either one or two arguments", decl);
9466 /* More Effective C++ rule 6. */
9468 && (operator_code == POSTINCREMENT_EXPR
9469 || operator_code == POSTDECREMENT_EXPR
9470 || operator_code == PREINCREMENT_EXPR
9471 || operator_code == PREDECREMENT_EXPR))
9473 tree arg = TREE_VALUE (argtypes);
9474 tree ret = TREE_TYPE (TREE_TYPE (decl));
9475 if (methodp || TREE_CODE (arg) == REFERENCE_TYPE)
9476 arg = TREE_TYPE (arg);
9477 arg = TYPE_MAIN_VARIANT (arg);
9478 if (operator_code == PREINCREMENT_EXPR
9479 || operator_code == PREDECREMENT_EXPR)
9481 if (TREE_CODE (ret) != REFERENCE_TYPE
9482 || !same_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (ret)),
9484 warning (OPT_Weffc__, "prefix %qD should return %qT", decl,
9485 build_reference_type (arg));
9489 if (!same_type_p (TYPE_MAIN_VARIANT (ret), arg))
9490 warning (OPT_Weffc__, "postfix %qD should return %qT", decl, arg);
9494 else if (unary_op_p (operator_code))
9499 error ("%qD must take %<void%>", decl);
9501 error ("%qD must take exactly one argument", decl);
9505 else /* if (binary_op_p (operator_code)) */
9510 error ("%qD must take exactly one argument", decl);
9512 error ("%qD must take exactly two arguments", decl);
9516 /* More Effective C++ rule 7. */
9518 && (operator_code == TRUTH_ANDIF_EXPR
9519 || operator_code == TRUTH_ORIF_EXPR
9520 || operator_code == COMPOUND_EXPR))
9521 warning (OPT_Weffc__, "user-defined %qD always evaluates both arguments",
9525 /* Effective C++ rule 23. */
9528 && !DECL_ASSIGNMENT_OPERATOR_P (decl)
9529 && (operator_code == PLUS_EXPR
9530 || operator_code == MINUS_EXPR
9531 || operator_code == TRUNC_DIV_EXPR
9532 || operator_code == MULT_EXPR
9533 || operator_code == TRUNC_MOD_EXPR)
9534 && TREE_CODE (TREE_TYPE (TREE_TYPE (decl))) == REFERENCE_TYPE)
9535 warning (OPT_Weffc__, "%qD should return by value", decl);
9538 for (; argtypes && argtypes != void_list_node;
9539 argtypes = TREE_CHAIN (argtypes))
9540 if (TREE_PURPOSE (argtypes))
9542 TREE_PURPOSE (argtypes) = NULL_TREE;
9543 if (operator_code == POSTINCREMENT_EXPR
9544 || operator_code == POSTDECREMENT_EXPR)
9547 pedwarn ("%qD cannot have default arguments", decl);
9551 error ("%qD cannot have default arguments", decl);
9559 /* Return a string giving the keyword associate with CODE. */
9562 tag_name (enum tag_types code)
9581 /* Name lookup in an elaborated-type-specifier (after the keyword
9582 indicated by TAG_CODE) has found the TYPE_DECL DECL. If the
9583 elaborated-type-specifier is invalid, issue a diagnostic and return
9584 error_mark_node; otherwise, return the *_TYPE to which it referred.
9585 If ALLOW_TEMPLATE_P is true, TYPE may be a class template. */
9588 check_elaborated_type_specifier (enum tag_types tag_code,
9590 bool allow_template_p)
9596 struct S { struct S *p; };
9598 name lookup will find the TYPE_DECL for the implicit "S::S"
9599 typedef. Adjust for that here. */
9600 if (DECL_SELF_REFERENCE_P (decl))
9601 decl = TYPE_NAME (TREE_TYPE (decl));
9603 type = TREE_TYPE (decl);
9605 /* Check TEMPLATE_TYPE_PARM first because DECL_IMPLICIT_TYPEDEF_P
9606 is false for this case as well. */
9607 if (TREE_CODE (type) == TEMPLATE_TYPE_PARM)
9609 error ("using template type parameter %qT after %qs",
9610 type, tag_name (tag_code));
9611 return error_mark_node;
9615 If the identifier resolves to a typedef-name or a template
9616 type-parameter, the elaborated-type-specifier is ill-formed.
9618 In other words, the only legitimate declaration to use in the
9619 elaborated type specifier is the implicit typedef created when
9620 the type is declared. */
9621 else if (!DECL_IMPLICIT_TYPEDEF_P (decl)
9622 && tag_code != typename_type)
9624 error ("using typedef-name %qD after %qs", decl, tag_name (tag_code));
9625 error ("%q+D has a previous declaration here", decl);
9626 return error_mark_node;
9628 else if (TREE_CODE (type) != RECORD_TYPE
9629 && TREE_CODE (type) != UNION_TYPE
9630 && tag_code != enum_type
9631 && tag_code != typename_type)
9633 error ("%qT referred to as %qs", type, tag_name (tag_code));
9634 error ("%q+T has a previous declaration here", type);
9635 return error_mark_node;
9637 else if (TREE_CODE (type) != ENUMERAL_TYPE
9638 && tag_code == enum_type)
9640 error ("%qT referred to as enum", type);
9641 error ("%q+T has a previous declaration here", type);
9642 return error_mark_node;
9644 else if (!allow_template_p
9645 && TREE_CODE (type) == RECORD_TYPE
9646 && CLASSTYPE_IS_TEMPLATE (type))
9648 /* If a class template appears as elaborated type specifier
9649 without a template header such as:
9651 template <class T> class C {};
9652 void f(class C); // No template header here
9654 then the required template argument is missing. */
9655 error ("template argument required for %<%s %T%>",
9656 tag_name (tag_code),
9657 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type)));
9658 return error_mark_node;
9664 /* Lookup NAME in elaborate type specifier in scope according to
9665 SCOPE and issue diagnostics if necessary.
9666 Return *_TYPE node upon success, NULL_TREE when the NAME is not
9667 found, and ERROR_MARK_NODE for type error. */
9670 lookup_and_check_tag (enum tag_types tag_code, tree name,
9671 tag_scope scope, bool template_header_p)
9675 if (scope == ts_global)
9677 /* First try ordinary name lookup, ignoring hidden class name
9678 injected via friend declaration. */
9679 decl = lookup_name_prefer_type (name, 2);
9680 /* If that fails, the name will be placed in the smallest
9681 non-class, non-function-prototype scope according to 3.3.1/5.
9682 We may already have a hidden name declared as friend in this
9683 scope. So lookup again but not ignoring hidden names.
9684 If we find one, that name will be made visible rather than
9685 creating a new tag. */
9687 decl = lookup_type_scope (name, ts_within_enclosing_non_class);
9690 decl = lookup_type_scope (name, scope);
9692 if (decl && DECL_CLASS_TEMPLATE_P (decl))
9693 decl = DECL_TEMPLATE_RESULT (decl);
9695 if (decl && TREE_CODE (decl) == TYPE_DECL)
9697 /* Look for invalid nested type:
9701 if (scope == ts_current && DECL_SELF_REFERENCE_P (decl))
9703 error ("%qD has the same name as the class in which it is "
9706 return error_mark_node;
9709 /* Two cases we need to consider when deciding if a class
9710 template is allowed as an elaborated type specifier:
9711 1. It is a self reference to its own class.
9712 2. It comes with a template header.
9716 template <class T> class C {
9717 class C *c1; // DECL_SELF_REFERENCE_P is true
9720 template <class U> class C; // template_header_p is true
9721 template <class T> class C<T>::D {
9722 class C *c2; // DECL_SELF_REFERENCE_P is true
9725 t = check_elaborated_type_specifier (tag_code,
9728 | DECL_SELF_REFERENCE_P (decl));
9735 /* Get the struct, enum or union (TAG_CODE says which) with tag NAME.
9736 Define the tag as a forward-reference if it is not defined.
9738 If a declaration is given, process it here, and report an error if
9739 multiple declarations are not identical.
9741 SCOPE is TS_CURRENT when this is also a definition. Only look in
9742 the current frame for the name (since C++ allows new names in any
9743 scope.) It is TS_WITHIN_ENCLOSING_NON_CLASS if this is a friend
9744 declaration. Only look beginning from the current scope outward up
9745 till the nearest non-class scope. Otherwise it is TS_GLOBAL.
9747 TEMPLATE_HEADER_P is true when this declaration is preceded by
9748 a set of template parameters. */
9751 xref_tag (enum tag_types tag_code, tree name,
9752 tag_scope scope, bool template_header_p)
9754 enum tree_code code;
9756 tree context = NULL_TREE;
9758 timevar_push (TV_NAME_LOOKUP);
9760 gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE);
9772 code = ENUMERAL_TYPE;
9778 /* In case of anonymous name, xref_tag is only called to
9779 make type node and push name. Name lookup is not required. */
9780 if (ANON_AGGRNAME_P (name))
9783 t = lookup_and_check_tag (tag_code, name,
9784 scope, template_header_p);
9786 if (t == error_mark_node)
9787 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
9789 if (scope != ts_current && t && current_class_type
9790 && template_class_depth (current_class_type)
9791 && template_header_p)
9793 /* Since SCOPE is not TS_CURRENT, we are not looking at a
9794 definition of this tag. Since, in addition, we are currently
9795 processing a (member) template declaration of a template
9796 class, we must be very careful; consider:
9803 { template <class V>
9804 friend struct S1; };
9806 Here, the S2::S1 declaration should not be confused with the
9807 outer declaration. In particular, the inner version should
9808 have a template parameter of level 2, not level 1. This
9809 would be particularly important if the member declaration
9812 template <class V = U> friend struct S1;
9814 say, when we should tsubst into `U' when instantiating
9815 S2. On the other hand, when presented with:
9825 we must find the inner binding eventually. We
9826 accomplish this by making sure that the new type we
9827 create to represent this declaration has the right
9829 context = TYPE_CONTEXT (t);
9835 /* If no such tag is yet defined, create a forward-reference node
9836 and record it as the "definition".
9837 When a real declaration of this type is found,
9838 the forward-reference will be altered into a real type. */
9839 if (code == ENUMERAL_TYPE)
9841 error ("use of enum %q#D without previous declaration", name);
9842 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
9846 t = make_aggr_type (code);
9847 TYPE_CONTEXT (t) = context;
9848 t = pushtag (name, t, scope);
9853 if (template_header_p && IS_AGGR_TYPE (t))
9855 if (!redeclare_class_template (t, current_template_parms))
9856 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
9858 else if (!processing_template_decl
9860 && CLASSTYPE_IS_TEMPLATE (t))
9862 error ("redeclaration of %qT as a non-template", t);
9863 error ("previous declaration %q+D", t);
9864 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
9867 /* Make injected friend class visible. */
9868 if (scope != ts_within_enclosing_non_class
9869 && hidden_name_p (TYPE_NAME (t)))
9871 DECL_ANTICIPATED (TYPE_NAME (t)) = 0;
9872 DECL_FRIEND_P (TYPE_NAME (t)) = 0;
9874 if (TYPE_TEMPLATE_INFO (t))
9876 DECL_ANTICIPATED (TYPE_TI_TEMPLATE (t)) = 0;
9877 DECL_FRIEND_P (TYPE_TI_TEMPLATE (t)) = 0;
9882 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, t);
9886 xref_tag_from_type (tree old, tree id, tag_scope scope)
9888 enum tag_types tag_kind;
9890 if (TREE_CODE (old) == RECORD_TYPE)
9891 tag_kind = (CLASSTYPE_DECLARED_CLASS (old) ? class_type : record_type);
9893 tag_kind = union_type;
9895 if (id == NULL_TREE)
9896 id = TYPE_IDENTIFIER (old);
9898 return xref_tag (tag_kind, id, scope, false);
9901 /* Create the binfo hierarchy for REF with (possibly NULL) base list
9902 BASE_LIST. For each element on BASE_LIST the TREE_PURPOSE is an
9903 access_* node, and the TREE_VALUE is the type of the base-class.
9904 Non-NULL TREE_TYPE indicates virtual inheritance.
9906 Returns true if the binfo heirarchy was successfully created,
9907 false if an error was detected. */
9910 xref_basetypes (tree ref, tree base_list)
9913 tree binfo, base_binfo;
9914 unsigned max_vbases = 0; /* Maximum direct & indirect virtual bases. */
9915 unsigned max_bases = 0; /* Maximum direct bases. */
9917 tree default_access;
9918 tree igo_prev; /* Track Inheritance Graph Order. */
9920 if (ref == error_mark_node)
9923 /* The base of a derived class is private by default, all others are
9925 default_access = (TREE_CODE (ref) == RECORD_TYPE
9926 && CLASSTYPE_DECLARED_CLASS (ref)
9927 ? access_private_node : access_public_node);
9929 /* First, make sure that any templates in base-classes are
9930 instantiated. This ensures that if we call ourselves recursively
9931 we do not get confused about which classes are marked and which
9936 tree basetype = TREE_VALUE (*basep);
9938 if (!(processing_template_decl && uses_template_parms (basetype))
9939 && !complete_type_or_else (basetype, NULL))
9940 /* An incomplete type. Remove it from the list. */
9941 *basep = TREE_CHAIN (*basep);
9945 if (TREE_TYPE (*basep))
9947 if (CLASS_TYPE_P (basetype))
9948 max_vbases += VEC_length (tree, CLASSTYPE_VBASECLASSES (basetype));
9949 basep = &TREE_CHAIN (*basep);
9953 TYPE_MARKED_P (ref) = 1;
9955 /* The binfo slot should be empty, unless this is an (ill-formed)
9957 gcc_assert (!TYPE_BINFO (ref) || TYPE_SIZE (ref));
9958 gcc_assert (TYPE_MAIN_VARIANT (ref) == ref);
9960 binfo = make_tree_binfo (max_bases);
9962 TYPE_BINFO (ref) = binfo;
9963 BINFO_OFFSET (binfo) = size_zero_node;
9964 BINFO_TYPE (binfo) = ref;
9968 BINFO_BASE_ACCESSES (binfo) = VEC_alloc (tree, gc, max_bases);
9969 /* An aggregate cannot have baseclasses. */
9970 CLASSTYPE_NON_AGGREGATE (ref) = 1;
9972 if (TREE_CODE (ref) == UNION_TYPE)
9974 error ("derived union %qT invalid", ref);
9981 if (TYPE_FOR_JAVA (ref))
9983 error ("Java class %qT cannot have multiple bases", ref);
9990 CLASSTYPE_VBASECLASSES (ref) = VEC_alloc (tree, gc, max_vbases);
9992 if (TYPE_FOR_JAVA (ref))
9994 error ("Java class %qT cannot have virtual bases", ref);
9999 for (igo_prev = binfo; base_list; base_list = TREE_CHAIN (base_list))
10001 tree access = TREE_PURPOSE (base_list);
10002 int via_virtual = TREE_TYPE (base_list) != NULL_TREE;
10003 tree basetype = TREE_VALUE (base_list);
10005 if (access == access_default_node)
10006 access = default_access;
10008 if (TREE_CODE (basetype) == TYPE_DECL)
10009 basetype = TREE_TYPE (basetype);
10010 if (TREE_CODE (basetype) != RECORD_TYPE
10011 && TREE_CODE (basetype) != TYPENAME_TYPE
10012 && TREE_CODE (basetype) != TEMPLATE_TYPE_PARM
10013 && TREE_CODE (basetype) != BOUND_TEMPLATE_TEMPLATE_PARM)
10015 error ("base type %qT fails to be a struct or class type",
10020 if (TYPE_FOR_JAVA (basetype) && (current_lang_depth () == 0))
10021 TYPE_FOR_JAVA (ref) = 1;
10023 base_binfo = NULL_TREE;
10024 if (CLASS_TYPE_P (basetype) && !dependent_type_p (basetype))
10026 base_binfo = TYPE_BINFO (basetype);
10027 /* The original basetype could have been a typedef'd type. */
10028 basetype = BINFO_TYPE (base_binfo);
10030 /* Inherit flags from the base. */
10031 TYPE_HAS_NEW_OPERATOR (ref)
10032 |= TYPE_HAS_NEW_OPERATOR (basetype);
10033 TYPE_HAS_ARRAY_NEW_OPERATOR (ref)
10034 |= TYPE_HAS_ARRAY_NEW_OPERATOR (basetype);
10035 TYPE_GETS_DELETE (ref) |= TYPE_GETS_DELETE (basetype);
10036 TYPE_HAS_CONVERSION (ref) |= TYPE_HAS_CONVERSION (basetype);
10037 CLASSTYPE_DIAMOND_SHAPED_P (ref)
10038 |= CLASSTYPE_DIAMOND_SHAPED_P (basetype);
10039 CLASSTYPE_REPEATED_BASE_P (ref)
10040 |= CLASSTYPE_REPEATED_BASE_P (basetype);
10043 /* We must do this test after we've seen through a typedef
10045 if (TYPE_MARKED_P (basetype))
10047 if (basetype == ref)
10048 error ("recursive type %qT undefined", basetype);
10050 error ("duplicate base type %qT invalid", basetype);
10053 TYPE_MARKED_P (basetype) = 1;
10055 base_binfo = copy_binfo (base_binfo, basetype, ref,
10056 &igo_prev, via_virtual);
10057 if (!BINFO_INHERITANCE_CHAIN (base_binfo))
10058 BINFO_INHERITANCE_CHAIN (base_binfo) = binfo;
10060 BINFO_BASE_APPEND (binfo, base_binfo);
10061 BINFO_BASE_ACCESS_APPEND (binfo, access);
10064 if (VEC_space (tree, CLASSTYPE_VBASECLASSES (ref), 1))
10065 /* If we have space in the vbase vector, we must have shared at
10066 least one of them, and are therefore diamond shaped. */
10067 CLASSTYPE_DIAMOND_SHAPED_P (ref) = 1;
10069 /* Unmark all the types. */
10070 for (i = 0; BINFO_BASE_ITERATE (binfo, i, base_binfo); i++)
10071 TYPE_MARKED_P (BINFO_TYPE (base_binfo)) = 0;
10072 TYPE_MARKED_P (ref) = 0;
10074 /* Now see if we have a repeated base type. */
10075 if (!CLASSTYPE_REPEATED_BASE_P (ref))
10077 for (base_binfo = binfo; base_binfo;
10078 base_binfo = TREE_CHAIN (base_binfo))
10080 if (TYPE_MARKED_P (BINFO_TYPE (base_binfo)))
10082 CLASSTYPE_REPEATED_BASE_P (ref) = 1;
10085 TYPE_MARKED_P (BINFO_TYPE (base_binfo)) = 1;
10087 for (base_binfo = binfo; base_binfo;
10088 base_binfo = TREE_CHAIN (base_binfo))
10089 if (TYPE_MARKED_P (BINFO_TYPE (base_binfo)))
10090 TYPE_MARKED_P (BINFO_TYPE (base_binfo)) = 0;
10099 /* Begin compiling the definition of an enumeration type.
10101 Returns the type object, as yet incomplete.
10102 Also records info about it so that build_enumerator
10103 may be used to declare the individual values as they are read. */
10106 start_enum (tree name)
10110 gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE);
10112 /* If this is the real definition for a previous forward reference,
10113 fill in the contents in the same object that used to be the
10114 forward reference. */
10116 enumtype = lookup_and_check_tag (enum_type, name,
10117 /*tag_scope=*/ts_current,
10118 /*template_header_p=*/false);
10120 if (enumtype != NULL_TREE && TREE_CODE (enumtype) == ENUMERAL_TYPE)
10122 error ("multiple definition of %q#T", enumtype);
10123 error ("%Jprevious definition here", TYPE_MAIN_DECL (enumtype));
10124 /* Clear out TYPE_VALUES, and start again. */
10125 TYPE_VALUES (enumtype) = NULL_TREE;
10129 /* In case of error, make a dummy enum to allow parsing to
10131 if (enumtype == error_mark_node)
10132 name = make_anon_name ();
10134 enumtype = make_node (ENUMERAL_TYPE);
10135 enumtype = pushtag (name, enumtype, /*tag_scope=*/ts_current);
10141 /* After processing and defining all the values of an enumeration type,
10142 install their decls in the enumeration type and finish it off.
10143 ENUMTYPE is the type object and VALUES a list of name-value pairs. */
10146 finish_enum (tree enumtype)
10155 bool use_short_enum;
10159 integer_type_kind itk;
10160 tree underlying_type = NULL_TREE;
10162 /* We built up the VALUES in reverse order. */
10163 TYPE_VALUES (enumtype) = nreverse (TYPE_VALUES (enumtype));
10165 /* For an enum defined in a template, just set the type of the values;
10166 all further processing is postponed until the template is
10167 instantiated. We need to set the type so that tsubst of a CONST_DECL
10169 if (processing_template_decl)
10171 for (values = TYPE_VALUES (enumtype);
10173 values = TREE_CHAIN (values))
10174 TREE_TYPE (TREE_VALUE (values)) = enumtype;
10175 if (at_function_scope_p ())
10176 add_stmt (build_min (TAG_DEFN, enumtype));
10180 /* Determine the minimum and maximum values of the enumerators. */
10181 if (TYPE_VALUES (enumtype))
10183 minnode = maxnode = NULL_TREE;
10185 for (values = TYPE_VALUES (enumtype);
10187 values = TREE_CHAIN (values))
10189 decl = TREE_VALUE (values);
10191 /* [dcl.enum]: Following the closing brace of an enum-specifier,
10192 each enumerator has the type of its enumeration. Prior to the
10193 closing brace, the type of each enumerator is the type of its
10194 initializing value. */
10195 TREE_TYPE (decl) = enumtype;
10197 /* Update the minimum and maximum values, if appropriate. */
10198 value = DECL_INITIAL (decl);
10199 if (value == error_mark_node)
10200 value = integer_zero_node;
10201 /* Figure out what the minimum and maximum values of the
10202 enumerators are. */
10204 minnode = maxnode = value;
10205 else if (tree_int_cst_lt (maxnode, value))
10207 else if (tree_int_cst_lt (value, minnode))
10214 If the enumerator-list is empty, the underlying type is as if
10215 the enumeration had a single enumerator with value 0. */
10216 minnode = maxnode = integer_zero_node;
10218 /* Compute the number of bits require to represent all values of the
10219 enumeration. We must do this before the type of MINNODE and
10220 MAXNODE are transformed, since min_precision relies on the
10221 TREE_TYPE of the value it is passed. */
10222 unsignedp = tree_int_cst_sgn (minnode) >= 0;
10223 lowprec = min_precision (minnode, unsignedp);
10224 highprec = min_precision (maxnode, unsignedp);
10225 precision = MAX (lowprec, highprec);
10227 /* Determine the underlying type of the enumeration.
10231 The underlying type of an enumeration is an integral type that
10232 can represent all the enumerator values defined in the
10233 enumeration. It is implementation-defined which integral type is
10234 used as the underlying type for an enumeration except that the
10235 underlying type shall not be larger than int unless the value of
10236 an enumerator cannot fit in an int or unsigned int.
10238 We use "int" or an "unsigned int" as the underlying type, even if
10239 a smaller integral type would work, unless the user has
10240 explicitly requested that we use the smallest possible type. The
10241 user can request that for all enumerations with a command line
10242 flag, or for just one enumeration with an attribute. */
10244 use_short_enum = flag_short_enums
10245 || lookup_attribute ("packed", TYPE_ATTRIBUTES (enumtype));
10247 for (itk = (use_short_enum ? itk_char : itk_int);
10251 underlying_type = integer_types[itk];
10252 if (TYPE_PRECISION (underlying_type) >= precision
10253 && TYPE_UNSIGNED (underlying_type) == unsignedp)
10256 if (itk == itk_none)
10260 IF no integral type can represent all the enumerator values, the
10261 enumeration is ill-formed. */
10262 error ("no integral type can represent all of the enumerator values "
10263 "for %qT", enumtype);
10264 precision = TYPE_PRECISION (long_long_integer_type_node);
10265 underlying_type = integer_types[itk_unsigned_long_long];
10268 /* Compute the minium and maximum values for the type.
10272 For an enumeration where emin is the smallest enumerator and emax
10273 is the largest, the values of the enumeration are the values of the
10274 underlying type in the range bmin to bmax, where bmin and bmax are,
10275 respectively, the smallest and largest values of the smallest bit-
10276 field that can store emin and emax. */
10278 /* The middle-end currently assumes that types with TYPE_PRECISION
10279 narrower than their underlying type are suitably zero or sign
10280 extended to fill their mode. g++ doesn't make these guarantees.
10281 Until the middle-end can represent such paradoxical types, we
10282 set the TYPE_PRECISION to the width of the underlying type. */
10283 TYPE_PRECISION (enumtype) = TYPE_PRECISION (underlying_type);
10285 set_min_and_max_values_for_integral_type (enumtype, precision, unsignedp);
10289 The value of sizeof() applied to an enumeration type, an object
10290 of an enumeration type, or an enumerator, is the value of sizeof()
10291 applied to the underlying type. */
10292 TYPE_SIZE (enumtype) = TYPE_SIZE (underlying_type);
10293 TYPE_SIZE_UNIT (enumtype) = TYPE_SIZE_UNIT (underlying_type);
10294 TYPE_MODE (enumtype) = TYPE_MODE (underlying_type);
10295 TYPE_ALIGN (enumtype) = TYPE_ALIGN (underlying_type);
10296 TYPE_USER_ALIGN (enumtype) = TYPE_USER_ALIGN (underlying_type);
10297 TYPE_UNSIGNED (enumtype) = TYPE_UNSIGNED (underlying_type);
10299 /* Convert each of the enumerators to the type of the underlying
10300 type of the enumeration. */
10301 for (values = TYPE_VALUES (enumtype); values; values = TREE_CHAIN (values))
10303 location_t saved_location;
10305 decl = TREE_VALUE (values);
10306 saved_location = input_location;
10307 input_location = DECL_SOURCE_LOCATION (decl);
10308 value = perform_implicit_conversion (underlying_type,
10309 DECL_INITIAL (decl));
10310 input_location = saved_location;
10312 /* Do not clobber shared ints. */
10313 value = copy_node (value);
10315 TREE_TYPE (value) = enumtype;
10316 DECL_INITIAL (decl) = value;
10317 TREE_VALUE (values) = value;
10320 /* Fix up all variant types of this enum type. */
10321 for (t = TYPE_MAIN_VARIANT (enumtype); t; t = TYPE_NEXT_VARIANT (t))
10323 TYPE_VALUES (t) = TYPE_VALUES (enumtype);
10324 TYPE_MIN_VALUE (t) = TYPE_MIN_VALUE (enumtype);
10325 TYPE_MAX_VALUE (t) = TYPE_MAX_VALUE (enumtype);
10326 TYPE_SIZE (t) = TYPE_SIZE (enumtype);
10327 TYPE_SIZE_UNIT (t) = TYPE_SIZE_UNIT (enumtype);
10328 TYPE_MODE (t) = TYPE_MODE (enumtype);
10329 TYPE_PRECISION (t) = TYPE_PRECISION (enumtype);
10330 TYPE_ALIGN (t) = TYPE_ALIGN (enumtype);
10331 TYPE_USER_ALIGN (t) = TYPE_USER_ALIGN (enumtype);
10332 TYPE_UNSIGNED (t) = TYPE_UNSIGNED (enumtype);
10335 /* Finish debugging output for this type. */
10336 rest_of_type_compilation (enumtype, namespace_bindings_p ());
10339 /* Build and install a CONST_DECL for an enumeration constant of the
10340 enumeration type ENUMTYPE whose NAME and VALUE (if any) are provided.
10341 Assignment of sequential values by default is handled here. */
10344 build_enumerator (tree name, tree value, tree enumtype)
10350 /* If the VALUE was erroneous, pretend it wasn't there; that will
10351 result in the enum being assigned the next value in sequence. */
10352 if (value == error_mark_node)
10355 /* Remove no-op casts from the value. */
10357 STRIP_TYPE_NOPS (value);
10359 if (! processing_template_decl)
10361 /* Validate and default VALUE. */
10362 if (value != NULL_TREE)
10364 value = integral_constant_value (value);
10366 if (TREE_CODE (value) == INTEGER_CST)
10368 value = perform_integral_promotions (value);
10369 constant_expression_warning (value);
10373 error ("enumerator value for %qD not integer constant", name);
10378 /* Default based on previous value. */
10379 if (value == NULL_TREE)
10381 if (TYPE_VALUES (enumtype))
10384 unsigned HOST_WIDE_INT lo;
10388 /* The next value is the previous value plus one. We can
10389 safely assume that the previous value is an INTEGER_CST.
10390 add_double doesn't know the type of the target expression,
10391 so we must check with int_fits_type_p as well. */
10392 prev_value = DECL_INITIAL (TREE_VALUE (TYPE_VALUES (enumtype)));
10393 overflowed = add_double (TREE_INT_CST_LOW (prev_value),
10394 TREE_INT_CST_HIGH (prev_value),
10396 value = build_int_cst_wide (TREE_TYPE (prev_value), lo, hi);
10397 overflowed |= !int_fits_type_p (value, TREE_TYPE (prev_value));
10401 error ("overflow in enumeration values at %qD", name);
10402 value = error_mark_node;
10406 value = integer_zero_node;
10409 /* Remove no-op casts from the value. */
10410 STRIP_TYPE_NOPS (value);
10413 /* C++ associates enums with global, function, or class declarations. */
10414 context = current_scope ();
10416 /* Build the actual enumeration constant. Note that the enumeration
10417 constants have the type of their initializers until the
10418 enumeration is complete:
10422 Following the closing brace of an enum-specifier, each enumer-
10423 ator has the type of its enumeration. Prior to the closing
10424 brace, the type of each enumerator is the type of its
10425 initializing value.
10427 In finish_enum we will reset the type. Of course, if we're
10428 processing a template, there may be no value. */
10429 type = value ? TREE_TYPE (value) : NULL_TREE;
10431 if (context && context == current_class_type)
10432 /* This enum declaration is local to the class. We need the full
10433 lang_decl so that we can record DECL_CLASS_CONTEXT, for example. */
10434 decl = build_lang_decl (CONST_DECL, name, type);
10436 /* It's a global enum, or it's local to a function. (Note local to
10437 a function could mean local to a class method. */
10438 decl = build_decl (CONST_DECL, name, type);
10440 DECL_CONTEXT (decl) = FROB_CONTEXT (context);
10441 TREE_CONSTANT (decl) = 1;
10442 TREE_INVARIANT (decl) = 1;
10443 TREE_READONLY (decl) = 1;
10444 DECL_INITIAL (decl) = value;
10446 if (context && context == current_class_type)
10447 /* In something like `struct S { enum E { i = 7 }; };' we put `i'
10448 on the TYPE_FIELDS list for `S'. (That's so that you can say
10449 things like `S::i' later.) */
10450 finish_member_declaration (decl);
10454 /* Add this enumeration constant to the list for this type. */
10455 TYPE_VALUES (enumtype) = tree_cons (name, decl, TYPE_VALUES (enumtype));
10459 /* We're defining DECL. Make sure that it's type is OK. */
10462 check_function_type (tree decl, tree current_function_parms)
10464 tree fntype = TREE_TYPE (decl);
10465 tree return_type = complete_type (TREE_TYPE (fntype));
10467 /* In a function definition, arg types must be complete. */
10468 require_complete_types_for_parms (current_function_parms);
10470 if (dependent_type_p (return_type))
10472 if (!COMPLETE_OR_VOID_TYPE_P (return_type))
10474 tree args = TYPE_ARG_TYPES (fntype);
10476 error ("return type %q#T is incomplete", return_type);
10478 /* Make it return void instead. */
10479 if (TREE_CODE (fntype) == METHOD_TYPE)
10480 fntype = build_method_type_directly (TREE_TYPE (TREE_VALUE (args)),
10482 TREE_CHAIN (args));
10484 fntype = build_function_type (void_type_node, args);
10486 = build_exception_variant (fntype,
10487 TYPE_RAISES_EXCEPTIONS (TREE_TYPE (decl)));
10490 abstract_virtuals_error (decl, TREE_TYPE (fntype));
10493 /* Create the FUNCTION_DECL for a function definition.
10494 DECLSPECS and DECLARATOR are the parts of the declaration;
10495 they describe the function's name and the type it returns,
10496 but twisted together in a fashion that parallels the syntax of C.
10498 FLAGS is a bitwise or of SF_PRE_PARSED (indicating that the
10499 DECLARATOR is really the DECL for the function we are about to
10500 process and that DECLSPECS should be ignored), SF_INCLASS_INLINE
10501 indicating that the function is an inline defined in-class.
10503 This function creates a binding context for the function body
10504 as well as setting up the FUNCTION_DECL in current_function_decl.
10506 For C++, we must first check whether that datum makes any sense.
10507 For example, "class A local_a(1,2);" means that variable local_a
10508 is an aggregate of type A, which should have a constructor
10509 applied to it with the argument list [1, 2]. */
10512 start_preparsed_function (tree decl1, tree attrs, int flags)
10514 tree ctype = NULL_TREE;
10517 int doing_friend = 0;
10518 struct cp_binding_level *bl;
10519 tree current_function_parms;
10520 struct c_fileinfo *finfo
10521 = get_fileinfo (LOCATION_FILE (DECL_SOURCE_LOCATION (decl1)));
10522 bool honor_interface;
10524 /* Sanity check. */
10525 gcc_assert (TREE_CODE (TREE_VALUE (void_list_node)) == VOID_TYPE);
10526 gcc_assert (TREE_CHAIN (void_list_node) == NULL_TREE);
10528 fntype = TREE_TYPE (decl1);
10529 if (TREE_CODE (fntype) == METHOD_TYPE)
10530 ctype = TYPE_METHOD_BASETYPE (fntype);
10532 /* ISO C++ 11.4/5. A friend function defined in a class is in
10533 the (lexical) scope of the class in which it is defined. */
10534 if (!ctype && DECL_FRIEND_P (decl1))
10536 ctype = DECL_FRIEND_CONTEXT (decl1);
10538 /* CTYPE could be null here if we're dealing with a template;
10539 for example, `inline friend float foo()' inside a template
10540 will have no CTYPE set. */
10541 if (ctype && TREE_CODE (ctype) != RECORD_TYPE)
10547 if (DECL_DECLARED_INLINE_P (decl1)
10548 && lookup_attribute ("noinline", attrs))
10549 warning (0, "inline function %q+D given attribute noinline", decl1);
10551 if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (decl1))
10552 /* This is a constructor, we must ensure that any default args
10553 introduced by this definition are propagated to the clones
10554 now. The clones are used directly in overload resolution. */
10555 adjust_clone_args (decl1);
10557 /* Sometimes we don't notice that a function is a static member, and
10558 build a METHOD_TYPE for it. Fix that up now. */
10559 if (ctype != NULL_TREE && DECL_STATIC_FUNCTION_P (decl1)
10560 && TREE_CODE (TREE_TYPE (decl1)) == METHOD_TYPE)
10562 revert_static_member_fn (decl1);
10566 /* Set up current_class_type, and enter the scope of the class, if
10569 push_nested_class (ctype);
10570 else if (DECL_STATIC_FUNCTION_P (decl1))
10571 push_nested_class (DECL_CONTEXT (decl1));
10573 /* Now that we have entered the scope of the class, we must restore
10574 the bindings for any template parameters surrounding DECL1, if it
10575 is an inline member template. (Order is important; consider the
10576 case where a template parameter has the same name as a field of
10577 the class.) It is not until after this point that
10578 PROCESSING_TEMPLATE_DECL is guaranteed to be set up correctly. */
10579 if (flags & SF_INCLASS_INLINE)
10580 maybe_begin_member_template_processing (decl1);
10582 /* Effective C++ rule 15. */
10584 && DECL_OVERLOADED_OPERATOR_P (decl1) == NOP_EXPR
10585 && TREE_CODE (TREE_TYPE (fntype)) == VOID_TYPE)
10586 warning (OPT_Weffc__, "%<operator=%> should return a reference to %<*this%>");
10588 /* Make the init_value nonzero so pushdecl knows this is not tentative.
10589 error_mark_node is replaced below (in poplevel) with the BLOCK. */
10590 if (!DECL_INITIAL (decl1))
10591 DECL_INITIAL (decl1) = error_mark_node;
10593 /* This function exists in static storage.
10594 (This does not mean `static' in the C sense!) */
10595 TREE_STATIC (decl1) = 1;
10597 /* We must call push_template_decl after current_class_type is set
10598 up. (If we are processing inline definitions after exiting a
10599 class scope, current_class_type will be NULL_TREE until set above
10600 by push_nested_class.) */
10601 if (processing_template_decl)
10603 /* FIXME: Handle error_mark_node more gracefully. */
10604 tree newdecl1 = push_template_decl (decl1);
10605 if (newdecl1 != error_mark_node)
10609 /* We are now in the scope of the function being defined. */
10610 current_function_decl = decl1;
10612 /* Save the parm names or decls from this function's declarator
10613 where store_parm_decls will find them. */
10614 current_function_parms = DECL_ARGUMENTS (decl1);
10616 /* Make sure the parameter and return types are reasonable. When
10617 you declare a function, these types can be incomplete, but they
10618 must be complete when you define the function. */
10619 check_function_type (decl1, current_function_parms);
10621 /* Build the return declaration for the function. */
10622 restype = TREE_TYPE (fntype);
10623 /* Promote the value to int before returning it. */
10624 if (c_promoting_integer_type_p (restype))
10625 restype = type_promotes_to (restype);
10626 if (DECL_RESULT (decl1) == NULL_TREE)
10630 resdecl = build_decl (RESULT_DECL, 0, TYPE_MAIN_VARIANT (restype));
10631 DECL_ARTIFICIAL (resdecl) = 1;
10632 DECL_IGNORED_P (resdecl) = 1;
10633 DECL_RESULT (decl1) = resdecl;
10635 cp_apply_type_quals_to_decl (cp_type_quals (restype), resdecl);
10638 /* Initialize RTL machinery. We cannot do this until
10639 CURRENT_FUNCTION_DECL and DECL_RESULT are set up. We do this
10640 even when processing a template; this is how we get
10641 CFUN set up, and our per-function variables initialized.
10642 FIXME factor out the non-RTL stuff. */
10643 bl = current_binding_level;
10644 allocate_struct_function (decl1);
10645 current_binding_level = bl;
10647 /* Even though we're inside a function body, we still don't want to
10648 call expand_expr to calculate the size of a variable-sized array.
10649 We haven't necessarily assigned RTL to all variables yet, so it's
10650 not safe to try to expand expressions involving them. */
10651 cfun->x_dont_save_pending_sizes_p = 1;
10653 /* Start the statement-tree, start the tree now. */
10654 DECL_SAVED_TREE (decl1) = push_stmt_list ();
10656 /* Let the user know we're compiling this function. */
10657 announce_function (decl1);
10659 /* Record the decl so that the function name is defined.
10660 If we already have a decl for this name, and it is a FUNCTION_DECL,
10661 use the old decl. */
10662 if (!processing_template_decl && !(flags & SF_PRE_PARSED))
10664 /* A specialization is not used to guide overload resolution. */
10665 if (!DECL_FUNCTION_MEMBER_P (decl1)
10666 && !(DECL_USE_TEMPLATE (decl1) &&
10667 PRIMARY_TEMPLATE_P (DECL_TI_TEMPLATE (decl1))))
10669 tree olddecl = pushdecl (decl1);
10671 if (olddecl == error_mark_node)
10672 /* If something went wrong when registering the declaration,
10673 use DECL1; we have to have a FUNCTION_DECL to use when
10674 parsing the body of the function. */
10677 /* Otherwise, OLDDECL is either a previous declaration of
10678 the same function or DECL1 itself. */
10683 /* We need to set the DECL_CONTEXT. */
10684 if (!DECL_CONTEXT (decl1) && DECL_TEMPLATE_INFO (decl1))
10685 DECL_CONTEXT (decl1) = DECL_CONTEXT (DECL_TI_TEMPLATE (decl1));
10687 fntype = TREE_TYPE (decl1);
10689 /* If #pragma weak applies, mark the decl appropriately now.
10690 The pragma only applies to global functions. Because
10691 determining whether or not the #pragma applies involves
10692 computing the mangled name for the declaration, we cannot
10693 apply the pragma until after we have merged this declaration
10694 with any previous declarations; if the original declaration
10695 has a linkage specification, that specification applies to
10696 the definition as well, and may affect the mangled name. */
10697 if (!DECL_CONTEXT (decl1))
10698 maybe_apply_pragma_weak (decl1);
10701 /* Reset these in case the call to pushdecl changed them. */
10702 current_function_decl = decl1;
10703 cfun->decl = decl1;
10705 /* If we are (erroneously) defining a function that we have already
10706 defined before, wipe out what we knew before. */
10707 if (!DECL_PENDING_INLINE_P (decl1))
10708 DECL_SAVED_FUNCTION_DATA (decl1) = NULL;
10710 if (ctype && !doing_friend && !DECL_STATIC_FUNCTION_P (decl1))
10712 /* We know that this was set up by `grokclassfn'. We do not
10713 wait until `store_parm_decls', since evil parse errors may
10714 never get us to that point. Here we keep the consistency
10715 between `current_class_type' and `current_class_ptr'. */
10716 tree t = DECL_ARGUMENTS (decl1);
10718 gcc_assert (t != NULL_TREE && TREE_CODE (t) == PARM_DECL);
10719 gcc_assert (TREE_CODE (TREE_TYPE (t)) == POINTER_TYPE);
10721 cp_function_chain->x_current_class_ref
10722 = build_indirect_ref (t, NULL);
10723 cp_function_chain->x_current_class_ptr = t;
10725 /* Constructors and destructors need to know whether they're "in
10726 charge" of initializing virtual base classes. */
10727 t = TREE_CHAIN (t);
10728 if (DECL_HAS_IN_CHARGE_PARM_P (decl1))
10730 current_in_charge_parm = t;
10731 t = TREE_CHAIN (t);
10733 if (DECL_HAS_VTT_PARM_P (decl1))
10735 gcc_assert (DECL_NAME (t) == vtt_parm_identifier);
10736 current_vtt_parm = t;
10740 honor_interface = (!DECL_TEMPLATE_INSTANTIATION (decl1)
10741 /* Implicitly-defined methods (like the
10742 destructor for a class in which no destructor
10743 is explicitly declared) must not be defined
10744 until their definition is needed. So, we
10745 ignore interface specifications for
10746 compiler-generated functions. */
10747 && !DECL_ARTIFICIAL (decl1));
10749 if (DECL_INTERFACE_KNOWN (decl1))
10751 tree ctx = decl_function_context (decl1);
10753 if (DECL_NOT_REALLY_EXTERN (decl1))
10754 DECL_EXTERNAL (decl1) = 0;
10756 if (ctx != NULL_TREE && DECL_DECLARED_INLINE_P (ctx)
10757 && TREE_PUBLIC (ctx))
10758 /* This is a function in a local class in an extern inline
10760 comdat_linkage (decl1);
10762 /* If this function belongs to an interface, it is public.
10763 If it belongs to someone else's interface, it is also external.
10764 This only affects inlines and template instantiations. */
10765 else if (!finfo->interface_unknown && honor_interface)
10767 if (DECL_DECLARED_INLINE_P (decl1)
10768 || DECL_TEMPLATE_INSTANTIATION (decl1)
10769 || processing_template_decl)
10771 DECL_EXTERNAL (decl1)
10772 = (finfo->interface_only
10773 || (DECL_DECLARED_INLINE_P (decl1)
10774 && ! flag_implement_inlines
10775 && !DECL_VINDEX (decl1)));
10777 /* For WIN32 we also want to put these in linkonce sections. */
10778 maybe_make_one_only (decl1);
10781 DECL_EXTERNAL (decl1) = 0;
10782 DECL_INTERFACE_KNOWN (decl1) = 1;
10783 /* If this function is in an interface implemented in this file,
10784 make sure that the backend knows to emit this function
10786 if (!DECL_EXTERNAL (decl1))
10787 mark_needed (decl1);
10789 else if (finfo->interface_unknown && finfo->interface_only
10790 && honor_interface)
10792 /* If MULTIPLE_SYMBOL_SPACES is defined and we saw a #pragma
10793 interface, we will have both finfo->interface_unknown and
10794 finfo->interface_only set. In that case, we don't want to
10795 use the normal heuristics because someone will supply a
10796 #pragma implementation elsewhere, and deducing it here would
10797 produce a conflict. */
10798 comdat_linkage (decl1);
10799 DECL_EXTERNAL (decl1) = 0;
10800 DECL_INTERFACE_KNOWN (decl1) = 1;
10801 DECL_DEFER_OUTPUT (decl1) = 1;
10805 /* This is a definition, not a reference.
10806 So clear DECL_EXTERNAL. */
10807 DECL_EXTERNAL (decl1) = 0;
10809 if ((DECL_DECLARED_INLINE_P (decl1)
10810 || DECL_TEMPLATE_INSTANTIATION (decl1))
10811 && ! DECL_INTERFACE_KNOWN (decl1)
10812 /* Don't try to defer nested functions for now. */
10813 && ! decl_function_context (decl1))
10814 DECL_DEFER_OUTPUT (decl1) = 1;
10816 DECL_INTERFACE_KNOWN (decl1) = 1;
10819 /* Determine the ELF visibility attribute for the function. We must not
10820 do this before calling "pushdecl", as we must allow "duplicate_decls"
10821 to merge any attributes appropriately. We also need to wait until
10823 if (!DECL_CLONED_FUNCTION_P (decl1))
10824 determine_visibility (decl1);
10826 begin_scope (sk_function_parms, decl1);
10830 if (DECL_DESTRUCTOR_P (decl1)
10831 || (DECL_CONSTRUCTOR_P (decl1)
10832 && targetm.cxx.cdtor_returns_this ()))
10834 cdtor_label = build_decl (LABEL_DECL, NULL_TREE, NULL_TREE);
10835 DECL_CONTEXT (cdtor_label) = current_function_decl;
10838 start_fname_decls ();
10840 store_parm_decls (current_function_parms);
10844 /* Like start_preparsed_function, except that instead of a
10845 FUNCTION_DECL, this function takes DECLSPECS and DECLARATOR.
10847 Returns 1 on success. If the DECLARATOR is not suitable for a function
10848 (it defines a datum instead), we return 0, which tells
10849 yyparse to report a parse error. */
10852 start_function (cp_decl_specifier_seq *declspecs,
10853 const cp_declarator *declarator,
10858 decl1 = grokdeclarator (declarator, declspecs, FUNCDEF, 1, &attrs);
10859 /* If the declarator is not suitable for a function definition,
10860 cause a syntax error. */
10861 if (decl1 == NULL_TREE || TREE_CODE (decl1) != FUNCTION_DECL)
10864 if (DECL_MAIN_P (decl1))
10865 /* main must return int. grokfndecl should have corrected it
10866 (and issued a diagnostic) if the user got it wrong. */
10867 gcc_assert (same_type_p (TREE_TYPE (TREE_TYPE (decl1)),
10868 integer_type_node));
10870 start_preparsed_function (decl1, attrs, /*flags=*/SF_DEFAULT);
10875 /* Returns true iff an EH_SPEC_BLOCK should be created in the body of
10879 use_eh_spec_block (tree fn)
10881 return (flag_exceptions && flag_enforce_eh_specs
10882 && !processing_template_decl
10883 && TYPE_RAISES_EXCEPTIONS (TREE_TYPE (fn))
10884 /* We insert the EH_SPEC_BLOCK only in the original
10885 function; then, it is copied automatically to the
10887 && !DECL_CLONED_FUNCTION_P (fn)
10888 /* Implicitly-generated constructors and destructors have
10889 exception specifications. However, those specifications
10890 are the union of the possible exceptions specified by the
10891 constructors/destructors for bases and members, so no
10892 unallowed exception will ever reach this function. By
10893 not creating the EH_SPEC_BLOCK we save a little memory,
10894 and we avoid spurious warnings about unreachable
10896 && !DECL_ARTIFICIAL (fn));
10899 /* Store the parameter declarations into the current function declaration.
10900 This is called after parsing the parameter declarations, before
10901 digesting the body of the function.
10903 Also install to binding contour return value identifier, if any. */
10906 store_parm_decls (tree current_function_parms)
10908 tree fndecl = current_function_decl;
10911 /* This is a chain of any other decls that came in among the parm
10912 declarations. If a parm is declared with enum {foo, bar} x;
10913 then CONST_DECLs for foo and bar are put here. */
10914 tree nonparms = NULL_TREE;
10916 if (current_function_parms)
10918 /* This case is when the function was defined with an ANSI prototype.
10919 The parms already have decls, so we need not do anything here
10920 except record them as in effect
10921 and complain if any redundant old-style parm decls were written. */
10923 tree specparms = current_function_parms;
10926 /* Must clear this because it might contain TYPE_DECLs declared
10928 current_binding_level->names = NULL;
10930 /* If we're doing semantic analysis, then we'll call pushdecl
10931 for each of these. We must do them in reverse order so that
10932 they end in the correct forward order. */
10933 specparms = nreverse (specparms);
10935 for (parm = specparms; parm; parm = next)
10937 next = TREE_CHAIN (parm);
10938 if (TREE_CODE (parm) == PARM_DECL)
10940 if (DECL_NAME (parm) == NULL_TREE
10941 || TREE_CODE (parm) != VOID_TYPE)
10944 error ("parameter %qD declared void", parm);
10948 /* If we find an enum constant or a type tag,
10949 put it aside for the moment. */
10950 TREE_CHAIN (parm) = NULL_TREE;
10951 nonparms = chainon (nonparms, parm);
10955 /* Get the decls in their original chain order and record in the
10956 function. This is all and only the PARM_DECLs that were
10957 pushed into scope by the loop above. */
10958 DECL_ARGUMENTS (fndecl) = getdecls ();
10961 DECL_ARGUMENTS (fndecl) = NULL_TREE;
10963 /* Now store the final chain of decls for the arguments
10964 as the decl-chain of the current lexical scope.
10965 Put the enumerators in as well, at the front so that
10966 DECL_ARGUMENTS is not modified. */
10967 current_binding_level->names = chainon (nonparms, DECL_ARGUMENTS (fndecl));
10969 if (use_eh_spec_block (current_function_decl))
10970 current_eh_spec_block = begin_eh_spec_block ();
10974 /* We have finished doing semantic analysis on DECL, but have not yet
10975 generated RTL for its body. Save away our current state, so that
10976 when we want to generate RTL later we know what to do. */
10979 save_function_data (tree decl)
10981 struct language_function *f;
10983 /* Save the language-specific per-function data so that we can
10984 get it back when we really expand this function. */
10985 gcc_assert (!DECL_PENDING_INLINE_P (decl));
10988 f = GGC_NEW (struct language_function);
10989 memcpy (f, cp_function_chain, sizeof (struct language_function));
10990 DECL_SAVED_FUNCTION_DATA (decl) = f;
10992 /* Clear out the bits we don't need. */
10993 f->base.x_stmt_tree.x_cur_stmt_list = NULL_TREE;
10994 f->bindings = NULL;
10995 f->x_local_names = NULL;
10999 /* Set the return value of the constructor (if present). */
11002 finish_constructor_body (void)
11007 if (targetm.cxx.cdtor_returns_this ())
11009 /* Any return from a constructor will end up here. */
11010 add_stmt (build_stmt (LABEL_EXPR, cdtor_label));
11012 val = DECL_ARGUMENTS (current_function_decl);
11013 val = build2 (MODIFY_EXPR, TREE_TYPE (val),
11014 DECL_RESULT (current_function_decl), val);
11015 /* Return the address of the object. */
11016 exprstmt = build_stmt (RETURN_EXPR, val);
11017 add_stmt (exprstmt);
11021 /* Do all the processing for the beginning of a destructor; set up the
11022 vtable pointers and cleanups for bases and members. */
11025 begin_destructor_body (void)
11027 tree compound_stmt;
11029 /* If the CURRENT_CLASS_TYPE is incomplete, we will have already
11030 issued an error message. We still want to try to process the
11031 body of the function, but initialize_vtbl_ptrs will crash if
11032 TYPE_BINFO is NULL. */
11033 if (COMPLETE_TYPE_P (current_class_type))
11035 compound_stmt = begin_compound_stmt (0);
11036 /* Make all virtual function table pointers in non-virtual base
11037 classes point to CURRENT_CLASS_TYPE's virtual function
11039 initialize_vtbl_ptrs (current_class_ptr);
11040 finish_compound_stmt (compound_stmt);
11042 /* And insert cleanups for our bases and members so that they
11043 will be properly destroyed if we throw. */
11044 push_base_cleanups ();
11048 /* At the end of every destructor we generate code to delete the object if
11049 necessary. Do that now. */
11052 finish_destructor_body (void)
11056 /* Any return from a destructor will end up here; that way all base
11057 and member cleanups will be run when the function returns. */
11058 add_stmt (build_stmt (LABEL_EXPR, cdtor_label));
11060 /* In a virtual destructor, we must call delete. */
11061 if (DECL_VIRTUAL_P (current_function_decl))
11064 tree virtual_size = cxx_sizeof (current_class_type);
11068 At the point of definition of a virtual destructor (including
11069 an implicit definition), non-placement operator delete shall
11070 be looked up in the scope of the destructor's class and if
11071 found shall be accessible and unambiguous. */
11072 exprstmt = build_op_delete_call(DELETE_EXPR, current_class_ptr,
11074 /*global_p=*/false,
11075 /*placement=*/NULL_TREE,
11076 /*alloc_fn=*/NULL_TREE);
11078 if_stmt = begin_if_stmt ();
11079 finish_if_stmt_cond (build2 (BIT_AND_EXPR, integer_type_node,
11080 current_in_charge_parm,
11083 finish_expr_stmt (exprstmt);
11084 finish_then_clause (if_stmt);
11085 finish_if_stmt (if_stmt);
11088 if (targetm.cxx.cdtor_returns_this ())
11092 val = DECL_ARGUMENTS (current_function_decl);
11093 val = build2 (MODIFY_EXPR, TREE_TYPE (val),
11094 DECL_RESULT (current_function_decl), val);
11095 /* Return the address of the object. */
11096 exprstmt = build_stmt (RETURN_EXPR, val);
11097 add_stmt (exprstmt);
11101 /* Do the necessary processing for the beginning of a function body, which
11102 in this case includes member-initializers, but not the catch clauses of
11103 a function-try-block. Currently, this means opening a binding level
11104 for the member-initializers (in a ctor) and member cleanups (in a dtor). */
11107 begin_function_body (void)
11111 if (! FUNCTION_NEEDS_BODY_BLOCK (current_function_decl))
11114 if (processing_template_decl)
11115 /* Do nothing now. */;
11117 /* Always keep the BLOCK node associated with the outermost pair of
11118 curly braces of a function. These are needed for correct
11119 operation of dwarfout.c. */
11120 keep_next_level (true);
11122 stmt = begin_compound_stmt (BCS_FN_BODY);
11124 if (processing_template_decl)
11125 /* Do nothing now. */;
11126 else if (DECL_DESTRUCTOR_P (current_function_decl))
11127 begin_destructor_body ();
11132 /* Do the processing for the end of a function body. Currently, this means
11133 closing out the cleanups for fully-constructed bases and members, and in
11134 the case of the destructor, deleting the object if desired. Again, this
11135 is only meaningful for [cd]tors, since they are the only functions where
11136 there is a significant distinction between the main body and any
11137 function catch clauses. Handling, say, main() return semantics here
11138 would be wrong, as flowing off the end of a function catch clause for
11139 main() would also need to return 0. */
11142 finish_function_body (tree compstmt)
11144 if (compstmt == NULL_TREE)
11147 /* Close the block. */
11148 finish_compound_stmt (compstmt);
11150 if (processing_template_decl)
11151 /* Do nothing now. */;
11152 else if (DECL_CONSTRUCTOR_P (current_function_decl))
11153 finish_constructor_body ();
11154 else if (DECL_DESTRUCTOR_P (current_function_decl))
11155 finish_destructor_body ();
11158 /* Given a function, returns the BLOCK corresponding to the outermost level
11159 of curly braces, skipping the artificial block created for constructor
11163 outer_curly_brace_block (tree fndecl)
11165 tree block = BLOCK_SUBBLOCKS (DECL_INITIAL (fndecl));
11166 if (FUNCTION_NEEDS_BODY_BLOCK (current_function_decl))
11167 /* Skip the artificial function body block. */
11168 block = BLOCK_SUBBLOCKS (block);
11172 /* Finish up a function declaration and compile that function
11173 all the way to assembler language output. The free the storage
11174 for the function definition.
11176 FLAGS is a bitwise or of the following values:
11178 We just finished processing the body of an in-class inline
11179 function definition. (This processing will have taken place
11180 after the class definition is complete.) */
11183 finish_function (int flags)
11185 tree fndecl = current_function_decl;
11186 tree fntype, ctype = NULL_TREE;
11187 int inclass_inline = (flags & 2) != 0;
11190 /* When we get some parse errors, we can end up without a
11191 current_function_decl, so cope. */
11192 if (fndecl == NULL_TREE)
11193 return error_mark_node;
11195 if (DECL_NONSTATIC_MEMBER_FUNCTION_P (fndecl)
11196 && DECL_VIRTUAL_P (fndecl)
11197 && !processing_template_decl)
11199 tree fnclass = DECL_CONTEXT (fndecl);
11200 if (fndecl == CLASSTYPE_KEY_METHOD (fnclass))
11201 keyed_classes = tree_cons (NULL_TREE, fnclass, keyed_classes);
11204 nested = function_depth > 1;
11205 fntype = TREE_TYPE (fndecl);
11207 /* TREE_READONLY (fndecl) = 1;
11208 This caused &foo to be of type ptr-to-const-function
11209 which then got a warning when stored in a ptr-to-function variable. */
11211 gcc_assert (building_stmt_tree ());
11213 /* For a cloned function, we've already got all the code we need;
11214 there's no need to add any extra bits. */
11215 if (!DECL_CLONED_FUNCTION_P (fndecl))
11217 if (DECL_MAIN_P (current_function_decl))
11221 /* Make it so that `main' always returns 0 by default (or
11224 stmt = finish_return_stmt (integer_one_node);
11226 stmt = finish_return_stmt (integer_zero_node);
11228 /* Hack. We don't want the middle-end to warn that this
11229 return is unreachable, so put the statement on the
11231 #ifdef USE_MAPPED_LOCATION
11232 SET_EXPR_LOCATION (stmt, UNKNOWN_LOCATION);
11234 annotate_with_file_line (stmt, input_filename, 0);
11238 if (use_eh_spec_block (current_function_decl))
11239 finish_eh_spec_block (TYPE_RAISES_EXCEPTIONS
11240 (TREE_TYPE (current_function_decl)),
11241 current_eh_spec_block);
11244 /* If we're saving up tree structure, tie off the function now. */
11245 DECL_SAVED_TREE (fndecl) = pop_stmt_list (DECL_SAVED_TREE (fndecl));
11247 finish_fname_decls ();
11249 /* If this function can't throw any exceptions, remember that. */
11250 if (!processing_template_decl
11251 && !cp_function_chain->can_throw
11252 && !flag_non_call_exceptions
11253 && !DECL_REPLACEABLE_P (fndecl))
11254 TREE_NOTHROW (fndecl) = 1;
11256 /* This must come after expand_function_end because cleanups might
11257 have declarations (from inline functions) that need to go into
11258 this function's blocks. */
11260 /* If the current binding level isn't the outermost binding level
11261 for this function, either there is a bug, or we have experienced
11262 syntax errors and the statement tree is malformed. */
11263 if (current_binding_level->kind != sk_function_parms)
11265 /* Make sure we have already experienced errors. */
11266 gcc_assert (errorcount);
11268 /* Throw away the broken statement tree and extra binding
11270 DECL_SAVED_TREE (fndecl) = alloc_stmt_list ();
11272 while (current_binding_level->kind != sk_function_parms)
11274 if (current_binding_level->kind == sk_class)
11275 pop_nested_class ();
11277 poplevel (0, 0, 0);
11280 poplevel (1, 0, 1);
11282 /* Statements should always be full-expressions at the outermost set
11283 of curly braces for a function. */
11284 gcc_assert (stmts_are_full_exprs_p ());
11286 /* Set up the named return value optimization, if we can. Candidate
11287 variables are selected in check_return_expr. */
11288 if (current_function_return_value)
11290 tree r = current_function_return_value;
11293 if (r != error_mark_node
11294 /* This is only worth doing for fns that return in memory--and
11295 simpler, since we don't have to worry about promoted modes. */
11296 && aggregate_value_p (TREE_TYPE (TREE_TYPE (fndecl)), fndecl)
11297 /* Only allow this for variables declared in the outer scope of
11298 the function so we know that their lifetime always ends with a
11299 return; see g++.dg/opt/nrv6.C. We could be more flexible if
11300 we were to do this optimization in tree-ssa. */
11301 && (outer = outer_curly_brace_block (fndecl))
11302 && chain_member (r, BLOCK_VARS (outer)))
11303 finalize_nrv (&DECL_SAVED_TREE (fndecl), r, DECL_RESULT (fndecl));
11305 current_function_return_value = NULL_TREE;
11308 /* Remember that we were in class scope. */
11309 if (current_class_name)
11310 ctype = current_class_type;
11312 /* Must mark the RESULT_DECL as being in this function. */
11313 DECL_CONTEXT (DECL_RESULT (fndecl)) = fndecl;
11315 /* Set the BLOCK_SUPERCONTEXT of the outermost function scope to point
11316 to the FUNCTION_DECL node itself. */
11317 BLOCK_SUPERCONTEXT (DECL_INITIAL (fndecl)) = fndecl;
11319 /* Save away current state, if appropriate. */
11320 if (!processing_template_decl)
11321 save_function_data (fndecl);
11323 /* Complain if there's just no return statement. */
11324 if (warn_return_type
11325 && TREE_CODE (TREE_TYPE (fntype)) != VOID_TYPE
11326 && !dependent_type_p (TREE_TYPE (fntype))
11327 && !current_function_returns_value && !current_function_returns_null
11328 /* Don't complain if we abort or throw. */
11329 && !current_function_returns_abnormally
11330 && !DECL_NAME (DECL_RESULT (fndecl))
11331 /* Normally, with -Wreturn-type, flow will complain. Unless we're an
11332 inline function, as we might never be compiled separately. */
11333 && (DECL_INLINE (fndecl) || processing_template_decl)
11334 /* Structor return values (if any) are set by the compiler. */
11335 && !DECL_CONSTRUCTOR_P (fndecl)
11336 && !DECL_DESTRUCTOR_P (fndecl))
11337 warning (OPT_Wreturn_type, "no return statement in function returning non-void");
11339 /* Store the end of the function, so that we get good line number
11340 info for the epilogue. */
11341 cfun->function_end_locus = input_location;
11343 /* Genericize before inlining. */
11344 if (!processing_template_decl)
11346 struct language_function *f = DECL_SAVED_FUNCTION_DATA (fndecl);
11347 cp_genericize (fndecl);
11348 /* Clear out the bits we don't need. */
11349 f->x_current_class_ptr = NULL;
11350 f->x_current_class_ref = NULL;
11351 f->x_eh_spec_block = NULL;
11352 f->x_in_charge_parm = NULL;
11353 f->x_vtt_parm = NULL;
11354 f->x_return_value = NULL;
11355 f->bindings = NULL;
11356 f->extern_decl_map = NULL;
11358 /* Handle attribute((warn_unused_result)). Relies on gimple input. */
11359 c_warn_unused_result (&DECL_SAVED_TREE (fndecl));
11361 /* Clear out the bits we don't need. */
11362 local_names = NULL;
11364 /* We're leaving the context of this function, so zap cfun. It's still in
11365 DECL_STRUCT_FUNCTION, and we'll restore it in tree_rest_of_compilation. */
11367 current_function_decl = NULL;
11369 /* If this is an in-class inline definition, we may have to pop the
11370 bindings for the template parameters that we added in
11371 maybe_begin_member_template_processing when start_function was
11373 if (inclass_inline)
11374 maybe_end_member_template_processing ();
11376 /* Leave the scope of the class. */
11378 pop_nested_class ();
11384 /* Let the error reporting routines know that we're outside a
11385 function. For a nested function, this value is used in
11386 cxx_pop_function_context and then reset via pop_function_context. */
11387 current_function_decl = NULL_TREE;
11392 /* Create the FUNCTION_DECL for a function definition.
11393 DECLSPECS and DECLARATOR are the parts of the declaration;
11394 they describe the return type and the name of the function,
11395 but twisted together in a fashion that parallels the syntax of C.
11397 This function creates a binding context for the function body
11398 as well as setting up the FUNCTION_DECL in current_function_decl.
11400 Returns a FUNCTION_DECL on success.
11402 If the DECLARATOR is not suitable for a function (it defines a datum
11403 instead), we return 0, which tells yyparse to report a parse error.
11405 May return void_type_node indicating that this method is actually
11406 a friend. See grokfield for more details.
11408 Came here with a `.pushlevel' .
11410 DO NOT MAKE ANY CHANGES TO THIS CODE WITHOUT MAKING CORRESPONDING
11411 CHANGES TO CODE IN `grokfield'. */
11414 start_method (cp_decl_specifier_seq *declspecs,
11415 const cp_declarator *declarator, tree attrlist)
11417 tree fndecl = grokdeclarator (declarator, declspecs, MEMFUNCDEF, 0,
11420 if (fndecl == error_mark_node)
11421 return error_mark_node;
11423 if (fndecl == NULL || TREE_CODE (fndecl) != FUNCTION_DECL)
11425 error ("invalid member function declaration");
11426 return error_mark_node;
11430 cplus_decl_attributes (&fndecl, attrlist, 0);
11432 /* Pass friends other than inline friend functions back. */
11433 if (fndecl == void_type_node)
11436 if (DECL_IN_AGGR_P (fndecl))
11438 if (DECL_CONTEXT (fndecl)
11439 && TREE_CODE (DECL_CONTEXT (fndecl)) != NAMESPACE_DECL)
11440 error ("%qD is already defined in class %qT", fndecl,
11441 DECL_CONTEXT (fndecl));
11442 return error_mark_node;
11445 check_template_shadow (fndecl);
11447 DECL_DECLARED_INLINE_P (fndecl) = 1;
11448 if (flag_default_inline)
11449 DECL_INLINE (fndecl) = 1;
11451 /* We process method specializations in finish_struct_1. */
11452 if (processing_template_decl && !DECL_TEMPLATE_SPECIALIZATION (fndecl))
11454 fndecl = push_template_decl (fndecl);
11455 if (fndecl == error_mark_node)
11459 if (! DECL_FRIEND_P (fndecl))
11461 if (TREE_CHAIN (fndecl))
11463 fndecl = copy_node (fndecl);
11464 TREE_CHAIN (fndecl) = NULL_TREE;
11468 finish_decl (fndecl, NULL_TREE, NULL_TREE);
11470 /* Make a place for the parms. */
11471 begin_scope (sk_function_parms, fndecl);
11473 DECL_IN_AGGR_P (fndecl) = 1;
11477 /* Go through the motions of finishing a function definition.
11478 We don't compile this method until after the whole class has
11481 FINISH_METHOD must return something that looks as though it
11482 came from GROKFIELD (since we are defining a method, after all).
11484 This is called after parsing the body of the function definition.
11485 STMTS is the chain of statements that makes up the function body.
11487 DECL is the ..._DECL that `start_method' provided. */
11490 finish_method (tree decl)
11492 tree fndecl = decl;
11497 if (decl == void_type_node)
11500 old_initial = DECL_INITIAL (fndecl);
11502 /* Undo the level for the parms (from start_method).
11503 This is like poplevel, but it causes nothing to be
11504 saved. Saving information here confuses symbol-table
11505 output routines. Besides, this information will
11506 be correctly output when this method is actually
11509 /* Clear out the meanings of the local variables of this level;
11510 also record in each decl which block it belongs to. */
11512 for (link = current_binding_level->names; link; link = TREE_CHAIN (link))
11514 if (DECL_NAME (link) != NULL_TREE)
11515 pop_binding (DECL_NAME (link), link);
11516 gcc_assert (TREE_CODE (link) != FUNCTION_DECL);
11517 DECL_CONTEXT (link) = NULL_TREE;
11520 poplevel (0, 0, 0);
11522 DECL_INITIAL (fndecl) = old_initial;
11524 /* We used to check if the context of FNDECL was different from
11525 current_class_type as another way to get inside here. This didn't work
11526 for String.cc in libg++. */
11527 if (DECL_FRIEND_P (fndecl))
11529 VEC_safe_push (tree, gc, CLASSTYPE_INLINE_FRIENDS (current_class_type),
11531 decl = void_type_node;
11538 /* VAR is a VAR_DECL. If its type is incomplete, remember VAR so that
11539 we can lay it out later, when and if its type becomes complete. */
11542 maybe_register_incomplete_var (tree var)
11544 gcc_assert (TREE_CODE (var) == VAR_DECL);
11546 /* Keep track of variables with incomplete types. */
11547 if (!processing_template_decl && TREE_TYPE (var) != error_mark_node
11548 && DECL_EXTERNAL (var))
11550 tree inner_type = TREE_TYPE (var);
11552 while (TREE_CODE (inner_type) == ARRAY_TYPE)
11553 inner_type = TREE_TYPE (inner_type);
11554 inner_type = TYPE_MAIN_VARIANT (inner_type);
11556 if ((!COMPLETE_TYPE_P (inner_type) && CLASS_TYPE_P (inner_type))
11557 /* RTTI TD entries are created while defining the type_info. */
11558 || (TYPE_LANG_SPECIFIC (inner_type)
11559 && TYPE_BEING_DEFINED (inner_type)))
11560 incomplete_vars = tree_cons (inner_type, var, incomplete_vars);
11564 /* Called when a class type (given by TYPE) is defined. If there are
11565 any existing VAR_DECLs whose type hsa been completed by this
11566 declaration, update them now. */
11569 complete_vars (tree type)
11571 tree *list = &incomplete_vars;
11573 gcc_assert (CLASS_TYPE_P (type));
11576 if (same_type_p (type, TREE_PURPOSE (*list)))
11578 tree var = TREE_VALUE (*list);
11579 tree type = TREE_TYPE (var);
11580 /* Complete the type of the variable. The VAR_DECL itself
11581 will be laid out in expand_expr. */
11582 complete_type (type);
11583 cp_apply_type_quals_to_decl (cp_type_quals (type), var);
11584 /* Remove this entry from the list. */
11585 *list = TREE_CHAIN (*list);
11588 list = &TREE_CHAIN (*list);
11591 /* Check for pending declarations which may have abstract type. */
11592 complete_type_check_abstract (type);
11595 /* If DECL is of a type which needs a cleanup, build that cleanup
11599 cxx_maybe_build_cleanup (tree decl)
11601 tree type = TREE_TYPE (decl);
11603 if (type != error_mark_node && TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type))
11605 int flags = LOOKUP_NORMAL|LOOKUP_DESTRUCTOR;
11607 bool has_vbases = (TREE_CODE (type) == RECORD_TYPE
11608 && CLASSTYPE_VBASECLASSES (type));
11610 if (TREE_CODE (type) == ARRAY_TYPE)
11614 cxx_mark_addressable (decl);
11615 rval = build_unary_op (ADDR_EXPR, decl, 0);
11618 /* Optimize for space over speed here. */
11619 if (!has_vbases || flag_expensive_optimizations)
11620 flags |= LOOKUP_NONVIRTUAL;
11622 rval = build_delete (TREE_TYPE (rval), rval,
11623 sfk_complete_destructor, flags, 0);
11630 /* When a stmt has been parsed, this function is called. */
11637 /* DECL was originally constructed as a non-static member function,
11638 but turned out to be static. Update it accordingly. */
11641 revert_static_member_fn (tree decl)
11644 tree function = TREE_TYPE (decl);
11645 tree args = TYPE_ARG_TYPES (function);
11647 if (cp_type_quals (TREE_TYPE (TREE_VALUE (args)))
11648 != TYPE_UNQUALIFIED)
11649 error ("static member function %q#D declared with type qualifiers", decl);
11651 args = TREE_CHAIN (args);
11652 tmp = build_function_type (TREE_TYPE (function), args);
11653 tmp = build_qualified_type (tmp, cp_type_quals (function));
11654 tmp = build_exception_variant (tmp,
11655 TYPE_RAISES_EXCEPTIONS (function));
11656 TREE_TYPE (decl) = tmp;
11657 if (DECL_ARGUMENTS (decl))
11658 DECL_ARGUMENTS (decl) = TREE_CHAIN (DECL_ARGUMENTS (decl));
11659 DECL_STATIC_FUNCTION_P (decl) = 1;
11662 /* Initialize the variables used during compilation of a C++
11666 cxx_push_function_context (struct function * f)
11668 struct language_function *p = GGC_CNEW (struct language_function);
11671 /* Whenever we start a new function, we destroy temporaries in the
11673 current_stmt_tree ()->stmts_are_full_exprs_p = 1;
11679 if (DECL_SAVED_FUNCTION_DATA (fn))
11681 /* If we already parsed this function, and we're just expanding it
11682 now, restore saved state. */
11683 *cp_function_chain = *DECL_SAVED_FUNCTION_DATA (fn);
11685 /* We don't need the saved data anymore. Unless this is an inline
11686 function; we need the named return value info for
11687 declare_return_variable. */
11688 if (! DECL_INLINE (fn))
11689 DECL_SAVED_FUNCTION_DATA (fn) = NULL;
11694 /* Free the language-specific parts of F, now that we've finished
11695 compiling the function. */
11698 cxx_pop_function_context (struct function * f)
11703 /* Return which tree structure is used by T, or TS_CP_GENERIC if T is
11704 one of the language-independent trees. */
11706 enum cp_tree_node_structure_enum
11707 cp_tree_node_structure (union lang_tree_node * t)
11709 switch (TREE_CODE (&t->generic))
11711 case DEFAULT_ARG: return TS_CP_DEFAULT_ARG;
11712 case IDENTIFIER_NODE: return TS_CP_IDENTIFIER;
11713 case OVERLOAD: return TS_CP_OVERLOAD;
11714 case TEMPLATE_PARM_INDEX: return TS_CP_TPI;
11715 case TINST_LEVEL: return TS_CP_TINST_LEVEL;
11716 case PTRMEM_CST: return TS_CP_PTRMEM;
11717 case BASELINK: return TS_CP_BASELINK;
11718 default: return TS_CP_GENERIC;
11722 /* Build the void_list_node (void_type_node having been created). */
11724 build_void_list_node (void)
11726 tree t = build_tree_list (NULL_TREE, void_type_node);
11731 cp_missing_noreturn_ok_p (tree decl)
11733 /* A missing noreturn is ok for the `main' function. */
11734 return DECL_MAIN_P (decl);
11737 /* Return the COMDAT group into which DECL should be placed. */
11740 cxx_comdat_group (tree decl)
11744 /* Virtual tables, construction virtual tables, and virtual table
11745 tables all go in a single COMDAT group, named after the primary
11747 if (TREE_CODE (decl) == VAR_DECL && DECL_VTABLE_OR_VTT_P (decl))
11748 name = DECL_ASSEMBLER_NAME (CLASSTYPE_VTABLES (DECL_CONTEXT (decl)));
11749 /* For all other DECLs, the COMDAT group is the mangled name of the
11750 declaration itself. */
11753 while (DECL_THUNK_P (decl))
11755 /* If TARGET_USE_LOCAL_THUNK_ALIAS_P, use_thunk puts the thunk
11756 into the same section as the target function. In that case
11757 we must return target's name. */
11758 tree target = THUNK_TARGET (decl);
11759 if (TARGET_USE_LOCAL_THUNK_ALIAS_P (target)
11760 && DECL_SECTION_NAME (target) != NULL
11761 && DECL_ONE_ONLY (target))
11766 name = DECL_ASSEMBLER_NAME (decl);
11769 return IDENTIFIER_POINTER (name);
11772 #include "gt-cp-decl.h"