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)
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);
1380 error ("conflicting declaration %q#D", newdecl);
1381 error ("%q+D has a previous declaration as %q#D", olddecl, olddecl);
1382 return error_mark_node;
1385 else if (TREE_CODE (newdecl) == FUNCTION_DECL
1386 && ((DECL_TEMPLATE_SPECIALIZATION (olddecl)
1387 && (!DECL_TEMPLATE_INFO (newdecl)
1388 || (DECL_TI_TEMPLATE (newdecl)
1389 != DECL_TI_TEMPLATE (olddecl))))
1390 || (DECL_TEMPLATE_SPECIALIZATION (newdecl)
1391 && (!DECL_TEMPLATE_INFO (olddecl)
1392 || (DECL_TI_TEMPLATE (olddecl)
1393 != DECL_TI_TEMPLATE (newdecl))))))
1394 /* It's OK to have a template specialization and a non-template
1395 with the same type, or to have specializations of two
1396 different templates with the same type. Note that if one is a
1397 specialization, and the other is an instantiation of the same
1398 template, that we do not exit at this point. That situation
1399 can occur if we instantiate a template class, and then
1400 specialize one of its methods. This situation is valid, but
1401 the declarations must be merged in the usual way. */
1403 else if (TREE_CODE (newdecl) == FUNCTION_DECL
1404 && ((DECL_TEMPLATE_INSTANTIATION (olddecl)
1405 && !DECL_USE_TEMPLATE (newdecl))
1406 || (DECL_TEMPLATE_INSTANTIATION (newdecl)
1407 && !DECL_USE_TEMPLATE (olddecl))))
1408 /* One of the declarations is a template instantiation, and the
1409 other is not a template at all. That's OK. */
1411 else if (TREE_CODE (newdecl) == NAMESPACE_DECL)
1413 /* In [namespace.alias] we have:
1415 In a declarative region, a namespace-alias-definition can be
1416 used to redefine a namespace-alias declared in that declarative
1417 region to refer only to the namespace to which it already
1420 Therefore, if we encounter a second alias directive for the same
1421 alias, we can just ignore the second directive. */
1422 if (DECL_NAMESPACE_ALIAS (newdecl)
1423 && (DECL_NAMESPACE_ALIAS (newdecl)
1424 == DECL_NAMESPACE_ALIAS (olddecl)))
1426 /* [namespace.alias]
1428 A namespace-name or namespace-alias shall not be declared as
1429 the name of any other entity in the same declarative region.
1430 A namespace-name defined at global scope shall not be
1431 declared as the name of any other entity in any global scope
1433 error ("declaration of namespace %qD conflicts with", newdecl);
1434 error ("previous declaration of namespace %q+D here", olddecl);
1435 return error_mark_node;
1439 const char *errmsg = redeclaration_error_message (newdecl, olddecl);
1442 error (errmsg, newdecl);
1443 if (DECL_NAME (olddecl) != NULL_TREE)
1444 error ((DECL_INITIAL (olddecl) && namespace_bindings_p ())
1445 ? "%q+#D previously defined here"
1446 : "%q+#D previously declared here", olddecl);
1447 return error_mark_node;
1449 else if (TREE_CODE (olddecl) == FUNCTION_DECL
1450 && DECL_INITIAL (olddecl) != NULL_TREE
1451 && TYPE_ARG_TYPES (TREE_TYPE (olddecl)) == NULL_TREE
1452 && TYPE_ARG_TYPES (TREE_TYPE (newdecl)) != NULL_TREE)
1454 /* Prototype decl follows defn w/o prototype. */
1455 warning (0, "prototype for %q+#D", newdecl);
1456 warning (0, "%Jfollows non-prototype definition here", olddecl);
1458 else if ((TREE_CODE (olddecl) == FUNCTION_DECL
1459 || TREE_CODE (olddecl) == VAR_DECL)
1460 && DECL_LANGUAGE (newdecl) != DECL_LANGUAGE (olddecl))
1463 If two declarations of the same function or object
1464 specify different linkage-specifications ..., the program
1465 is ill-formed.... Except for functions with C++ linkage,
1466 a function declaration without a linkage specification
1467 shall not precede the first linkage specification for
1468 that function. A function can be declared without a
1469 linkage specification after an explicit linkage
1470 specification has been seen; the linkage explicitly
1471 specified in the earlier declaration is not affected by
1472 such a function declaration.
1474 DR 563 raises the question why the restrictions on
1475 functions should not also apply to objects. Older
1476 versions of G++ silently ignore the linkage-specification
1484 which is clearly wrong. Therefore, we now treat objects
1486 if (current_lang_depth () == 0)
1488 /* There is no explicit linkage-specification, so we use
1489 the linkage from the previous declaration. */
1490 if (!DECL_LANG_SPECIFIC (newdecl))
1491 retrofit_lang_decl (newdecl);
1492 SET_DECL_LANGUAGE (newdecl, DECL_LANGUAGE (olddecl));
1496 error ("previous declaration of %q+#D with %qL linkage",
1497 olddecl, DECL_LANGUAGE (olddecl));
1498 error ("conflicts with new declaration with %qL linkage",
1499 DECL_LANGUAGE (newdecl));
1503 if (DECL_LANG_SPECIFIC (olddecl) && DECL_USE_TEMPLATE (olddecl))
1505 else if (TREE_CODE (olddecl) == FUNCTION_DECL)
1507 tree t1 = TYPE_ARG_TYPES (TREE_TYPE (olddecl));
1508 tree t2 = TYPE_ARG_TYPES (TREE_TYPE (newdecl));
1511 if (TREE_CODE (TREE_TYPE (newdecl)) == METHOD_TYPE)
1512 t1 = TREE_CHAIN (t1), t2 = TREE_CHAIN (t2);
1514 for (; t1 && t1 != void_list_node;
1515 t1 = TREE_CHAIN (t1), t2 = TREE_CHAIN (t2), i++)
1516 if (TREE_PURPOSE (t1) && TREE_PURPOSE (t2))
1518 if (1 == simple_cst_equal (TREE_PURPOSE (t1),
1521 pedwarn ("default argument given for parameter %d of %q#D",
1523 pedwarn ("after previous specification in %q+#D", olddecl);
1527 error ("default argument given for parameter %d of %q#D",
1529 error ("after previous specification in %q+#D",
1534 if (DECL_DECLARED_INLINE_P (newdecl)
1535 && ! DECL_DECLARED_INLINE_P (olddecl)
1536 && TREE_ADDRESSABLE (olddecl) && warn_inline)
1538 warning (0, "%q#D was used before it was declared inline", newdecl);
1539 warning (0, "%Jprevious non-inline declaration here", olddecl);
1544 /* Do not merge an implicit typedef with an explicit one. In:
1548 typedef class A A __attribute__ ((foo));
1550 the attribute should apply only to the typedef. */
1551 if (TREE_CODE (olddecl) == TYPE_DECL
1552 && (DECL_IMPLICIT_TYPEDEF_P (olddecl)
1553 || DECL_IMPLICIT_TYPEDEF_P (newdecl)))
1556 /* If new decl is `static' and an `extern' was seen previously,
1558 warn_extern_redeclared_static (newdecl, olddecl);
1560 /* We have committed to returning 1 at this point. */
1561 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1563 /* Now that functions must hold information normally held
1564 by field decls, there is extra work to do so that
1565 declaration information does not get destroyed during
1567 if (DECL_VINDEX (olddecl))
1568 DECL_VINDEX (newdecl) = DECL_VINDEX (olddecl);
1569 if (DECL_CONTEXT (olddecl))
1570 DECL_CONTEXT (newdecl) = DECL_CONTEXT (olddecl);
1571 DECL_STATIC_CONSTRUCTOR (newdecl) |= DECL_STATIC_CONSTRUCTOR (olddecl);
1572 DECL_STATIC_DESTRUCTOR (newdecl) |= DECL_STATIC_DESTRUCTOR (olddecl);
1573 DECL_PURE_VIRTUAL_P (newdecl) |= DECL_PURE_VIRTUAL_P (olddecl);
1574 DECL_VIRTUAL_P (newdecl) |= DECL_VIRTUAL_P (olddecl);
1575 DECL_THIS_STATIC (newdecl) |= DECL_THIS_STATIC (olddecl);
1576 if (DECL_OVERLOADED_OPERATOR_P (olddecl) != ERROR_MARK)
1577 SET_OVERLOADED_OPERATOR_CODE
1578 (newdecl, DECL_OVERLOADED_OPERATOR_P (olddecl));
1579 new_defines_function = DECL_INITIAL (newdecl) != NULL_TREE;
1581 /* Optionally warn about more than one declaration for the same
1582 name, but don't warn about a function declaration followed by a
1584 if (warn_redundant_decls && ! DECL_ARTIFICIAL (olddecl)
1585 && !(new_defines_function && DECL_INITIAL (olddecl) == NULL_TREE)
1586 /* Don't warn about extern decl followed by definition. */
1587 && !(DECL_EXTERNAL (olddecl) && ! DECL_EXTERNAL (newdecl))
1588 /* Don't warn about friends, let add_friend take care of it. */
1589 && ! (newdecl_is_friend || DECL_FRIEND_P (olddecl)))
1591 warning (OPT_Wredundant_decls, "redundant redeclaration of %qD in same scope", newdecl);
1592 warning (OPT_Wredundant_decls, "previous declaration of %q+D", olddecl);
1596 /* Deal with C++: must preserve virtual function table size. */
1597 if (TREE_CODE (olddecl) == TYPE_DECL)
1599 tree newtype = TREE_TYPE (newdecl);
1600 tree oldtype = TREE_TYPE (olddecl);
1602 if (newtype != error_mark_node && oldtype != error_mark_node
1603 && TYPE_LANG_SPECIFIC (newtype) && TYPE_LANG_SPECIFIC (oldtype))
1604 CLASSTYPE_FRIEND_CLASSES (newtype)
1605 = CLASSTYPE_FRIEND_CLASSES (oldtype);
1607 DECL_ORIGINAL_TYPE (newdecl) = DECL_ORIGINAL_TYPE (olddecl);
1610 /* Copy all the DECL_... slots specified in the new decl
1611 except for any that we copy here from the old type. */
1612 DECL_ATTRIBUTES (newdecl)
1613 = (*targetm.merge_decl_attributes) (olddecl, newdecl);
1615 if (TREE_CODE (newdecl) == TEMPLATE_DECL)
1619 old_result = DECL_TEMPLATE_RESULT (olddecl);
1620 new_result = DECL_TEMPLATE_RESULT (newdecl);
1621 TREE_TYPE (olddecl) = TREE_TYPE (old_result);
1622 DECL_TEMPLATE_SPECIALIZATIONS (olddecl)
1623 = chainon (DECL_TEMPLATE_SPECIALIZATIONS (olddecl),
1624 DECL_TEMPLATE_SPECIALIZATIONS (newdecl));
1626 if (DECL_FUNCTION_TEMPLATE_P (newdecl))
1628 DECL_INLINE (old_result)
1629 |= DECL_INLINE (new_result);
1630 DECL_DECLARED_INLINE_P (old_result)
1631 |= DECL_DECLARED_INLINE_P (new_result);
1632 check_redeclaration_exception_specification (newdecl, olddecl);
1635 /* If the new declaration is a definition, update the file and
1636 line information on the declaration. */
1637 if (DECL_INITIAL (old_result) == NULL_TREE
1638 && DECL_INITIAL (new_result) != NULL_TREE)
1640 DECL_SOURCE_LOCATION (olddecl)
1641 = DECL_SOURCE_LOCATION (old_result)
1642 = DECL_SOURCE_LOCATION (newdecl);
1643 if (DECL_FUNCTION_TEMPLATE_P (newdecl))
1644 DECL_ARGUMENTS (old_result)
1645 = DECL_ARGUMENTS (new_result);
1653 /* Automatically handles default parameters. */
1654 tree oldtype = TREE_TYPE (olddecl);
1657 /* Merge the data types specified in the two decls. */
1658 newtype = merge_types (TREE_TYPE (newdecl), TREE_TYPE (olddecl));
1660 /* If merge_types produces a non-typedef type, just use the old type. */
1661 if (TREE_CODE (newdecl) == TYPE_DECL
1662 && newtype == DECL_ORIGINAL_TYPE (newdecl))
1665 if (TREE_CODE (newdecl) == VAR_DECL)
1667 DECL_THIS_EXTERN (newdecl) |= DECL_THIS_EXTERN (olddecl);
1668 DECL_INITIALIZED_P (newdecl) |= DECL_INITIALIZED_P (olddecl);
1669 DECL_NONTRIVIALLY_INITIALIZED_P (newdecl)
1670 |= DECL_NONTRIVIALLY_INITIALIZED_P (olddecl);
1671 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (newdecl)
1672 |= DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (olddecl);
1674 /* Merge the threadprivate attribute from OLDDECL into NEWDECL. */
1675 if (DECL_LANG_SPECIFIC (olddecl)
1676 && CP_DECL_THREADPRIVATE_P (olddecl))
1678 /* Allocate a LANG_SPECIFIC structure for NEWDECL, if needed. */
1679 if (!DECL_LANG_SPECIFIC (newdecl))
1680 retrofit_lang_decl (newdecl);
1682 DECL_TLS_MODEL (newdecl) = DECL_TLS_MODEL (olddecl);
1683 CP_DECL_THREADPRIVATE_P (newdecl) = 1;
1687 /* Do this after calling `merge_types' so that default
1688 parameters don't confuse us. */
1689 else if (TREE_CODE (newdecl) == FUNCTION_DECL)
1690 check_redeclaration_exception_specification (newdecl, olddecl);
1691 TREE_TYPE (newdecl) = TREE_TYPE (olddecl) = newtype;
1693 /* Lay the type out, unless already done. */
1694 if (! same_type_p (newtype, oldtype)
1695 && TREE_TYPE (newdecl) != error_mark_node
1696 && !(processing_template_decl && uses_template_parms (newdecl)))
1697 layout_type (TREE_TYPE (newdecl));
1699 if ((TREE_CODE (newdecl) == VAR_DECL
1700 || TREE_CODE (newdecl) == PARM_DECL
1701 || TREE_CODE (newdecl) == RESULT_DECL
1702 || TREE_CODE (newdecl) == FIELD_DECL
1703 || TREE_CODE (newdecl) == TYPE_DECL)
1704 && !(processing_template_decl && uses_template_parms (newdecl)))
1705 layout_decl (newdecl, 0);
1707 /* Merge the type qualifiers. */
1708 if (TREE_READONLY (newdecl))
1709 TREE_READONLY (olddecl) = 1;
1710 if (TREE_THIS_VOLATILE (newdecl))
1711 TREE_THIS_VOLATILE (olddecl) = 1;
1712 if (TREE_NOTHROW (newdecl))
1713 TREE_NOTHROW (olddecl) = 1;
1715 /* Merge deprecatedness. */
1716 if (TREE_DEPRECATED (newdecl))
1717 TREE_DEPRECATED (olddecl) = 1;
1719 /* Merge the initialization information. */
1720 if (DECL_INITIAL (newdecl) == NULL_TREE
1721 && DECL_INITIAL (olddecl) != NULL_TREE)
1723 DECL_INITIAL (newdecl) = DECL_INITIAL (olddecl);
1724 DECL_SOURCE_LOCATION (newdecl) = DECL_SOURCE_LOCATION (olddecl);
1725 if (CAN_HAVE_FULL_LANG_DECL_P (newdecl)
1726 && DECL_LANG_SPECIFIC (newdecl)
1727 && DECL_LANG_SPECIFIC (olddecl))
1729 DECL_SAVED_TREE (newdecl) = DECL_SAVED_TREE (olddecl);
1730 DECL_STRUCT_FUNCTION (newdecl) = DECL_STRUCT_FUNCTION (olddecl);
1734 /* Merge the section attribute.
1735 We want to issue an error if the sections conflict but that must be
1736 done later in decl_attributes since we are called before attributes
1738 if (DECL_SECTION_NAME (newdecl) == NULL_TREE)
1739 DECL_SECTION_NAME (newdecl) = DECL_SECTION_NAME (olddecl);
1741 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1743 DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (newdecl)
1744 |= DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (olddecl);
1745 DECL_NO_LIMIT_STACK (newdecl) |= DECL_NO_LIMIT_STACK (olddecl);
1746 TREE_THIS_VOLATILE (newdecl) |= TREE_THIS_VOLATILE (olddecl);
1747 TREE_READONLY (newdecl) |= TREE_READONLY (olddecl);
1748 TREE_NOTHROW (newdecl) |= TREE_NOTHROW (olddecl);
1749 DECL_IS_MALLOC (newdecl) |= DECL_IS_MALLOC (olddecl);
1750 DECL_IS_PURE (newdecl) |= DECL_IS_PURE (olddecl);
1751 /* Keep the old RTL. */
1752 COPY_DECL_RTL (olddecl, newdecl);
1754 else if (TREE_CODE (newdecl) == VAR_DECL
1755 && (DECL_SIZE (olddecl) || !DECL_SIZE (newdecl)))
1757 /* Keep the old RTL. We cannot keep the old RTL if the old
1758 declaration was for an incomplete object and the new
1759 declaration is not since many attributes of the RTL will
1761 COPY_DECL_RTL (olddecl, newdecl);
1764 /* If cannot merge, then use the new type and qualifiers,
1765 and don't preserve the old rtl. */
1768 /* Clean out any memory we had of the old declaration. */
1769 tree oldstatic = value_member (olddecl, static_aggregates);
1771 TREE_VALUE (oldstatic) = error_mark_node;
1773 TREE_TYPE (olddecl) = TREE_TYPE (newdecl);
1774 TREE_READONLY (olddecl) = TREE_READONLY (newdecl);
1775 TREE_THIS_VOLATILE (olddecl) = TREE_THIS_VOLATILE (newdecl);
1776 TREE_SIDE_EFFECTS (olddecl) = TREE_SIDE_EFFECTS (newdecl);
1779 /* Merge the storage class information. */
1780 merge_weak (newdecl, olddecl);
1782 DECL_ONE_ONLY (newdecl) |= DECL_ONE_ONLY (olddecl);
1783 DECL_DEFER_OUTPUT (newdecl) |= DECL_DEFER_OUTPUT (olddecl);
1784 TREE_PUBLIC (newdecl) = TREE_PUBLIC (olddecl);
1785 TREE_STATIC (olddecl) = TREE_STATIC (newdecl) |= TREE_STATIC (olddecl);
1786 if (! DECL_EXTERNAL (olddecl))
1787 DECL_EXTERNAL (newdecl) = 0;
1789 new_template = NULL_TREE;
1790 if (DECL_LANG_SPECIFIC (newdecl) && DECL_LANG_SPECIFIC (olddecl))
1792 DECL_INTERFACE_KNOWN (newdecl) |= DECL_INTERFACE_KNOWN (olddecl);
1793 DECL_NOT_REALLY_EXTERN (newdecl) |= DECL_NOT_REALLY_EXTERN (olddecl);
1794 DECL_COMDAT (newdecl) |= DECL_COMDAT (olddecl);
1795 DECL_TEMPLATE_INSTANTIATED (newdecl)
1796 |= DECL_TEMPLATE_INSTANTIATED (olddecl);
1798 /* If the OLDDECL is an instantiation and/or specialization,
1799 then the NEWDECL must be too. But, it may not yet be marked
1800 as such if the caller has created NEWDECL, but has not yet
1801 figured out that it is a redeclaration. */
1802 if (!DECL_USE_TEMPLATE (newdecl))
1803 DECL_USE_TEMPLATE (newdecl) = DECL_USE_TEMPLATE (olddecl);
1805 /* Don't really know how much of the language-specific
1806 values we should copy from old to new. */
1807 DECL_IN_AGGR_P (newdecl) = DECL_IN_AGGR_P (olddecl);
1808 DECL_LANG_SPECIFIC (newdecl)->decl_flags.u2 =
1809 DECL_LANG_SPECIFIC (olddecl)->decl_flags.u2;
1810 DECL_NONCONVERTING_P (newdecl) = DECL_NONCONVERTING_P (olddecl);
1811 DECL_REPO_AVAILABLE_P (newdecl) = DECL_REPO_AVAILABLE_P (olddecl);
1812 if (DECL_TEMPLATE_INFO (newdecl))
1813 new_template = DECL_TI_TEMPLATE (newdecl);
1814 DECL_TEMPLATE_INFO (newdecl) = DECL_TEMPLATE_INFO (olddecl);
1815 DECL_INITIALIZED_IN_CLASS_P (newdecl)
1816 |= DECL_INITIALIZED_IN_CLASS_P (olddecl);
1817 olddecl_friend = DECL_FRIEND_P (olddecl);
1818 hidden_friend = (DECL_ANTICIPATED (olddecl)
1819 && DECL_HIDDEN_FRIEND_P (olddecl)
1820 && newdecl_is_friend);
1822 /* Only functions have DECL_BEFRIENDING_CLASSES. */
1823 if (TREE_CODE (newdecl) == FUNCTION_DECL
1824 || DECL_FUNCTION_TEMPLATE_P (newdecl))
1826 DECL_BEFRIENDING_CLASSES (newdecl)
1827 = chainon (DECL_BEFRIENDING_CLASSES (newdecl),
1828 DECL_BEFRIENDING_CLASSES (olddecl));
1829 /* DECL_THUNKS is only valid for virtual functions,
1830 otherwise it is a DECL_FRIEND_CONTEXT. */
1831 if (DECL_VIRTUAL_P (newdecl))
1832 DECL_THUNKS (newdecl) = DECL_THUNKS (olddecl);
1836 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1838 if (DECL_TEMPLATE_INSTANTIATION (olddecl)
1839 && !DECL_TEMPLATE_INSTANTIATION (newdecl))
1841 /* If newdecl is not a specialization, then it is not a
1842 template-related function at all. And that means that we
1843 should have exited above, returning 0. */
1844 gcc_assert (DECL_TEMPLATE_SPECIALIZATION (newdecl));
1846 if (TREE_USED (olddecl))
1847 /* From [temp.expl.spec]:
1849 If a template, a member template or the member of a class
1850 template is explicitly specialized then that
1851 specialization shall be declared before the first use of
1852 that specialization that would cause an implicit
1853 instantiation to take place, in every translation unit in
1854 which such a use occurs. */
1855 error ("explicit specialization of %qD after first use",
1858 SET_DECL_TEMPLATE_SPECIALIZATION (olddecl);
1860 /* [temp.expl.spec/14] We don't inline explicit specialization
1861 just because the primary template says so. */
1865 if (DECL_PENDING_INLINE_INFO (newdecl) == 0)
1866 DECL_PENDING_INLINE_INFO (newdecl) = DECL_PENDING_INLINE_INFO (olddecl);
1868 DECL_DECLARED_INLINE_P (newdecl) |= DECL_DECLARED_INLINE_P (olddecl);
1870 /* If either decl says `inline', this fn is inline, unless
1871 its definition was passed already. */
1872 if (DECL_INLINE (newdecl) && DECL_INITIAL (olddecl) == NULL_TREE)
1873 DECL_INLINE (olddecl) = 1;
1874 DECL_INLINE (newdecl) = DECL_INLINE (olddecl);
1876 DECL_UNINLINABLE (newdecl) = DECL_UNINLINABLE (olddecl)
1877 = (DECL_UNINLINABLE (newdecl) || DECL_UNINLINABLE (olddecl));
1880 /* Preserve abstractness on cloned [cd]tors. */
1881 DECL_ABSTRACT (newdecl) = DECL_ABSTRACT (olddecl);
1885 SET_DECL_LANGUAGE (olddecl, DECL_LANGUAGE (newdecl));
1886 COPY_DECL_ASSEMBLER_NAME (newdecl, olddecl);
1887 COPY_DECL_RTL (newdecl, olddecl);
1889 if (! types_match || new_defines_function)
1891 /* These need to be copied so that the names are available.
1892 Note that if the types do match, we'll preserve inline
1893 info and other bits, but if not, we won't. */
1894 DECL_ARGUMENTS (olddecl) = DECL_ARGUMENTS (newdecl);
1895 DECL_RESULT (olddecl) = DECL_RESULT (newdecl);
1897 if (new_defines_function)
1898 /* If defining a function declared with other language
1899 linkage, use the previously declared language linkage. */
1900 SET_DECL_LANGUAGE (newdecl, DECL_LANGUAGE (olddecl));
1901 else if (types_match)
1903 /* If redeclaring a builtin function, and not a definition,
1904 it stays built in. */
1905 if (DECL_BUILT_IN (olddecl))
1907 DECL_BUILT_IN_CLASS (newdecl) = DECL_BUILT_IN_CLASS (olddecl);
1908 DECL_FUNCTION_CODE (newdecl) = DECL_FUNCTION_CODE (olddecl);
1909 /* If we're keeping the built-in definition, keep the rtl,
1910 regardless of declaration matches. */
1911 COPY_DECL_RTL (olddecl, newdecl);
1914 DECL_RESULT (newdecl) = DECL_RESULT (olddecl);
1915 /* Don't clear out the arguments if we're redefining a function. */
1916 if (DECL_ARGUMENTS (olddecl))
1917 DECL_ARGUMENTS (newdecl) = DECL_ARGUMENTS (olddecl);
1920 else if (TREE_CODE (newdecl) == NAMESPACE_DECL)
1921 NAMESPACE_LEVEL (newdecl) = NAMESPACE_LEVEL (olddecl);
1923 /* Now preserve various other info from the definition. */
1924 TREE_ADDRESSABLE (newdecl) = TREE_ADDRESSABLE (olddecl);
1925 TREE_ASM_WRITTEN (newdecl) = TREE_ASM_WRITTEN (olddecl);
1926 DECL_COMMON (newdecl) = DECL_COMMON (olddecl);
1927 COPY_DECL_ASSEMBLER_NAME (olddecl, newdecl);
1929 /* Warn about conflicting visibility specifications. */
1930 if (DECL_VISIBILITY_SPECIFIED (olddecl)
1931 && DECL_VISIBILITY_SPECIFIED (newdecl)
1932 && DECL_VISIBILITY (newdecl) != DECL_VISIBILITY (olddecl))
1934 warning (OPT_Wattributes, "%q+D: visibility attribute ignored "
1935 "because it", newdecl);
1936 warning (OPT_Wattributes, "%Jconflicts with previous "
1937 "declaration here", olddecl);
1939 /* Choose the declaration which specified visibility. */
1940 if (DECL_VISIBILITY_SPECIFIED (olddecl))
1942 DECL_VISIBILITY (newdecl) = DECL_VISIBILITY (olddecl);
1943 DECL_VISIBILITY_SPECIFIED (newdecl) = 1;
1945 /* Init priority used to be merged from newdecl to olddecl by the memcpy,
1946 so keep this behavior. */
1947 if (TREE_CODE (newdecl) == VAR_DECL && DECL_HAS_INIT_PRIORITY_P (newdecl))
1949 SET_DECL_INIT_PRIORITY (olddecl, DECL_INIT_PRIORITY (newdecl));
1950 DECL_HAS_INIT_PRIORITY_P (olddecl) = 1;
1953 /* The DECL_LANG_SPECIFIC information in OLDDECL will be replaced
1954 with that from NEWDECL below. */
1955 if (DECL_LANG_SPECIFIC (olddecl))
1957 gcc_assert (DECL_LANG_SPECIFIC (olddecl)
1958 != DECL_LANG_SPECIFIC (newdecl));
1959 ggc_free (DECL_LANG_SPECIFIC (olddecl));
1962 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1966 function_size = sizeof (struct tree_decl_common);
1968 memcpy ((char *) olddecl + sizeof (struct tree_common),
1969 (char *) newdecl + sizeof (struct tree_common),
1970 function_size - sizeof (struct tree_common));
1972 memcpy ((char *) olddecl + sizeof (struct tree_decl_common),
1973 (char *) newdecl + sizeof (struct tree_decl_common),
1974 sizeof (struct tree_function_decl) - sizeof (struct tree_decl_common));
1976 /* If newdecl is a template instantiation, it is possible that
1977 the following sequence of events has occurred:
1979 o A friend function was declared in a class template. The
1980 class template was instantiated.
1982 o The instantiation of the friend declaration was
1983 recorded on the instantiation list, and is newdecl.
1985 o Later, however, instantiate_class_template called pushdecl
1986 on the newdecl to perform name injection. But, pushdecl in
1987 turn called duplicate_decls when it discovered that another
1988 declaration of a global function with the same name already
1991 o Here, in duplicate_decls, we decided to clobber newdecl.
1993 If we're going to do that, we'd better make sure that
1994 olddecl, and not newdecl, is on the list of
1995 instantiations so that if we try to do the instantiation
1996 again we won't get the clobbered declaration. */
1997 reregister_specialization (newdecl,
2003 size_t size = tree_code_size (TREE_CODE (olddecl));
2004 memcpy ((char *) olddecl + sizeof (struct tree_common),
2005 (char *) newdecl + sizeof (struct tree_common),
2006 sizeof (struct tree_decl_common) - sizeof (struct tree_common));
2007 switch (TREE_CODE (olddecl))
2017 memcpy ((char *) olddecl + sizeof (struct tree_decl_common),
2018 (char *) newdecl + sizeof (struct tree_decl_common),
2019 size - sizeof (struct tree_decl_common)
2020 + TREE_CODE_LENGTH (TREE_CODE (newdecl)) * sizeof (char *));
2024 memcpy ((char *) olddecl + sizeof (struct tree_decl_common),
2025 (char *) newdecl + sizeof (struct tree_decl_common),
2026 sizeof (struct tree_decl_non_common) - sizeof (struct tree_decl_common)
2027 + TREE_CODE_LENGTH (TREE_CODE (newdecl)) * sizeof (char *));
2031 DECL_UID (olddecl) = olddecl_uid;
2033 DECL_FRIEND_P (olddecl) = 1;
2036 DECL_ANTICIPATED (olddecl) = 1;
2037 DECL_HIDDEN_FRIEND_P (olddecl) = 1;
2040 /* NEWDECL contains the merged attribute lists.
2041 Update OLDDECL to be the same. */
2042 DECL_ATTRIBUTES (olddecl) = DECL_ATTRIBUTES (newdecl);
2044 /* If OLDDECL had its DECL_RTL instantiated, re-invoke make_decl_rtl
2045 so that encode_section_info has a chance to look at the new decl
2046 flags and attributes. */
2047 if (DECL_RTL_SET_P (olddecl)
2048 && (TREE_CODE (olddecl) == FUNCTION_DECL
2049 || (TREE_CODE (olddecl) == VAR_DECL
2050 && TREE_STATIC (olddecl))))
2051 make_decl_rtl (olddecl);
2053 /* The NEWDECL will no longer be needed. Because every out-of-class
2054 declaration of a member results in a call to duplicate_decls,
2055 freeing these nodes represents in a significant savings. */
2061 /* Return zero if the declaration NEWDECL is valid
2062 when the declaration OLDDECL (assumed to be for the same name)
2063 has already been seen.
2064 Otherwise return an error message format string with a %s
2065 where the identifier should go. */
2068 redeclaration_error_message (tree newdecl, tree olddecl)
2070 if (TREE_CODE (newdecl) == TYPE_DECL)
2072 /* Because C++ can put things into name space for free,
2073 constructs like "typedef struct foo { ... } foo"
2074 would look like an erroneous redeclaration. */
2075 if (same_type_p (TREE_TYPE (newdecl), TREE_TYPE (olddecl)))
2078 return "redefinition of %q#D";
2080 else if (TREE_CODE (newdecl) == FUNCTION_DECL)
2082 /* If this is a pure function, its olddecl will actually be
2083 the original initialization to `0' (which we force to call
2084 abort()). Don't complain about redefinition in this case. */
2085 if (DECL_LANG_SPECIFIC (olddecl) && DECL_PURE_VIRTUAL_P (olddecl)
2086 && DECL_INITIAL (olddecl) == NULL_TREE)
2089 /* If both functions come from different namespaces, this is not
2090 a redeclaration - this is a conflict with a used function. */
2091 if (DECL_NAMESPACE_SCOPE_P (olddecl)
2092 && DECL_CONTEXT (olddecl) != DECL_CONTEXT (newdecl)
2093 && ! decls_match (olddecl, newdecl))
2094 return "%qD conflicts with used function";
2096 /* We'll complain about linkage mismatches in
2097 warn_extern_redeclared_static. */
2099 /* Defining the same name twice is no good. */
2100 if (DECL_INITIAL (olddecl) != NULL_TREE
2101 && DECL_INITIAL (newdecl) != NULL_TREE)
2103 if (DECL_NAME (olddecl) == NULL_TREE)
2104 return "%q#D not declared in class";
2106 return "redefinition of %q#D";
2110 else if (TREE_CODE (newdecl) == TEMPLATE_DECL)
2114 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == TYPE_DECL)
2116 if (COMPLETE_TYPE_P (TREE_TYPE (newdecl))
2117 && COMPLETE_TYPE_P (TREE_TYPE (olddecl)))
2118 return "redefinition of %q#D";
2122 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) != FUNCTION_DECL
2123 || (DECL_TEMPLATE_RESULT (newdecl)
2124 == DECL_TEMPLATE_RESULT (olddecl)))
2127 nt = DECL_TEMPLATE_RESULT (newdecl);
2128 if (DECL_TEMPLATE_INFO (nt))
2129 nt = DECL_TEMPLATE_RESULT (template_for_substitution (nt));
2130 ot = DECL_TEMPLATE_RESULT (olddecl);
2131 if (DECL_TEMPLATE_INFO (ot))
2132 ot = DECL_TEMPLATE_RESULT (template_for_substitution (ot));
2133 if (DECL_INITIAL (nt) && DECL_INITIAL (ot))
2134 return "redefinition of %q#D";
2138 else if (TREE_CODE (newdecl) == VAR_DECL
2139 && DECL_THREAD_LOCAL_P (newdecl) != DECL_THREAD_LOCAL_P (olddecl)
2140 && (! DECL_LANG_SPECIFIC (olddecl)
2141 || ! CP_DECL_THREADPRIVATE_P (olddecl)
2142 || DECL_THREAD_LOCAL_P (newdecl)))
2144 /* Only variables can be thread-local, and all declarations must
2145 agree on this property. */
2146 if (DECL_THREAD_LOCAL_P (newdecl))
2147 return "thread-local declaration of %q#D follows "
2148 "non-thread-local declaration";
2150 return "non-thread-local declaration of %q#D follows "
2151 "thread-local declaration";
2153 else if (toplevel_bindings_p () || DECL_NAMESPACE_SCOPE_P (newdecl))
2155 /* Objects declared at top level: */
2156 /* If at least one is a reference, it's ok. */
2157 if (DECL_EXTERNAL (newdecl) || DECL_EXTERNAL (olddecl))
2159 /* Reject two definitions. */
2160 return "redefinition of %q#D";
2164 /* Objects declared with block scope: */
2165 /* Reject two definitions, and reject a definition
2166 together with an external reference. */
2167 if (!(DECL_EXTERNAL (newdecl) && DECL_EXTERNAL (olddecl)))
2168 return "redeclaration of %q#D";
2173 /* Hash and equality functions for the named_label table. */
2176 named_label_entry_hash (const void *data)
2178 const struct named_label_entry *ent = (const struct named_label_entry *) data;
2179 return DECL_UID (ent->label_decl);
2183 named_label_entry_eq (const void *a, const void *b)
2185 const struct named_label_entry *ent_a = (const struct named_label_entry *) a;
2186 const struct named_label_entry *ent_b = (const struct named_label_entry *) b;
2187 return ent_a->label_decl == ent_b->label_decl;
2190 /* Create a new label, named ID. */
2193 make_label_decl (tree id, int local_p)
2195 struct named_label_entry *ent;
2199 decl = build_decl (LABEL_DECL, id, void_type_node);
2201 DECL_CONTEXT (decl) = current_function_decl;
2202 DECL_MODE (decl) = VOIDmode;
2203 C_DECLARED_LABEL_FLAG (decl) = local_p;
2205 /* Say where one reference is to the label, for the sake of the
2206 error if it is not defined. */
2207 DECL_SOURCE_LOCATION (decl) = input_location;
2209 /* Record the fact that this identifier is bound to this label. */
2210 SET_IDENTIFIER_LABEL_VALUE (id, decl);
2212 /* Create the label htab for the function on demand. */
2214 named_labels = htab_create_ggc (13, named_label_entry_hash,
2215 named_label_entry_eq, NULL);
2217 /* Record this label on the list of labels used in this function.
2218 We do this before calling make_label_decl so that we get the
2219 IDENTIFIER_LABEL_VALUE before the new label is declared. */
2220 ent = GGC_CNEW (struct named_label_entry);
2221 ent->label_decl = decl;
2223 slot = htab_find_slot (named_labels, ent, INSERT);
2224 gcc_assert (*slot == NULL);
2230 /* Look for a label named ID in the current function. If one cannot
2231 be found, create one. (We keep track of used, but undefined,
2232 labels, and complain about them at the end of a function.) */
2235 lookup_label (tree id)
2239 timevar_push (TV_NAME_LOOKUP);
2240 /* You can't use labels at global scope. */
2241 if (current_function_decl == NULL_TREE)
2243 error ("label %qE referenced outside of any function", id);
2244 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, NULL_TREE);
2247 /* See if we've already got this label. */
2248 decl = IDENTIFIER_LABEL_VALUE (id);
2249 if (decl != NULL_TREE && DECL_CONTEXT (decl) == current_function_decl)
2250 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, decl);
2252 decl = make_label_decl (id, /*local_p=*/0);
2253 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, decl);
2256 /* Declare a local label named ID. */
2259 declare_local_label (tree id)
2263 /* Add a new entry to the SHADOWED_LABELS list so that when we leave
2264 this scope we can restore the old value of IDENTIFIER_TYPE_VALUE. */
2265 shadow = tree_cons (IDENTIFIER_LABEL_VALUE (id), NULL_TREE,
2266 current_binding_level->shadowed_labels);
2267 current_binding_level->shadowed_labels = shadow;
2269 decl = make_label_decl (id, /*local_p=*/1);
2270 TREE_VALUE (shadow) = decl;
2275 /* Returns nonzero if it is ill-formed to jump past the declaration of
2276 DECL. Returns 2 if it's also a real problem. */
2279 decl_jump_unsafe (tree decl)
2281 if (TREE_CODE (decl) != VAR_DECL || TREE_STATIC (decl)
2282 || TREE_TYPE (decl) == error_mark_node)
2285 if (TYPE_NEEDS_CONSTRUCTING (TREE_TYPE (decl))
2286 || DECL_NONTRIVIALLY_INITIALIZED_P (decl))
2289 if (pod_type_p (TREE_TYPE (decl)))
2292 /* The POD stuff is just pedantry; why should it matter if the class
2293 contains a field of pointer to member type? */
2297 /* A subroutine of check_previous_goto_1 to identify a branch to the user. */
2300 identify_goto (tree decl, const location_t *locus)
2303 pedwarn ("jump to label %qD", decl);
2305 pedwarn ("jump to case label");
2307 pedwarn ("%H from here", locus);
2310 /* Check that a single previously seen jump to a newly defined label
2311 is OK. DECL is the LABEL_DECL or 0; LEVEL is the binding_level for
2312 the jump context; NAMES are the names in scope in LEVEL at the jump
2313 context; LOCUS is the source position of the jump or 0. Returns
2314 true if all is well. */
2317 check_previous_goto_1 (tree decl, struct cp_binding_level* level, tree names,
2318 bool exited_omp, const location_t *locus)
2320 struct cp_binding_level *b;
2321 bool identified = false, saw_eh = false, saw_omp = false;
2325 identify_goto (decl, locus);
2326 error (" exits OpenMP structured block");
2327 identified = saw_omp = true;
2330 for (b = current_binding_level; b ; b = b->level_chain)
2332 tree new_decls, old_decls = (b == level ? names : NULL_TREE);
2334 for (new_decls = b->names; new_decls != old_decls;
2335 new_decls = TREE_CHAIN (new_decls))
2337 int problem = decl_jump_unsafe (new_decls);
2343 identify_goto (decl, locus);
2347 error (" crosses initialization of %q+#D", new_decls);
2349 pedwarn (" enters scope of non-POD %q+#D", new_decls);
2354 if ((b->kind == sk_try || b->kind == sk_catch) && !saw_eh)
2358 identify_goto (decl, locus);
2361 if (b->kind == sk_try)
2362 error (" enters try block");
2364 error (" enters catch block");
2367 if (b->kind == sk_omp && !saw_omp)
2371 identify_goto (decl, locus);
2374 error (" enters OpenMP structured block");
2383 check_previous_goto (tree decl, struct named_label_use_entry *use)
2385 check_previous_goto_1 (decl, use->binding_level,
2386 use->names_in_scope, use->in_omp_scope,
2387 &use->o_goto_locus);
2391 check_switch_goto (struct cp_binding_level* level)
2393 return check_previous_goto_1 (NULL_TREE, level, level->names, false, NULL);
2396 /* Check that a new jump to a label DECL is OK. Called by
2397 finish_goto_stmt. */
2400 check_goto (tree decl)
2402 struct named_label_entry *ent, dummy;
2403 bool saw_catch = false, identified = false;
2406 /* We can't know where a computed goto is jumping.
2407 So we assume that it's OK. */
2408 if (TREE_CODE (decl) != LABEL_DECL)
2411 /* We didn't record any information about this label when we created it,
2412 and there's not much point since it's trivial to analyze as a return. */
2413 if (decl == cdtor_label)
2416 dummy.label_decl = decl;
2417 ent = (struct named_label_entry *) htab_find (named_labels, &dummy);
2418 gcc_assert (ent != NULL);
2420 /* If the label hasn't been defined yet, defer checking. */
2421 if (! DECL_INITIAL (decl))
2423 struct named_label_use_entry *new_use;
2425 /* Don't bother creating another use if the last goto had the
2426 same data, and will therefore create the same set of errors. */
2428 && ent->uses->names_in_scope == current_binding_level->names)
2431 new_use = GGC_NEW (struct named_label_use_entry);
2432 new_use->binding_level = current_binding_level;
2433 new_use->names_in_scope = current_binding_level->names;
2434 new_use->o_goto_locus = input_location;
2435 new_use->in_omp_scope = false;
2437 new_use->next = ent->uses;
2438 ent->uses = new_use;
2442 if (ent->in_try_scope || ent->in_catch_scope
2443 || ent->in_omp_scope || ent->bad_decls)
2445 pedwarn ("jump to label %q+D", decl);
2446 pedwarn (" from here");
2450 for (bad = ent->bad_decls; bad; bad = TREE_CHAIN (bad))
2452 tree b = TREE_VALUE (bad);
2453 int u = decl_jump_unsafe (b);
2455 if (u > 1 && DECL_ARTIFICIAL (b))
2457 /* Can't skip init of __exception_info. */
2458 error ("%J enters catch block", b);
2462 error (" skips initialization of %q+#D", b);
2464 pedwarn (" enters scope of non-POD %q+#D", b);
2467 if (ent->in_try_scope)
2468 error (" enters try block");
2469 else if (ent->in_catch_scope && !saw_catch)
2470 error (" enters catch block");
2472 if (ent->in_omp_scope)
2473 error (" enters OpenMP structured block");
2474 else if (flag_openmp)
2476 struct cp_binding_level *b;
2477 for (b = current_binding_level; b ; b = b->level_chain)
2479 if (b == ent->binding_level)
2481 if (b->kind == sk_omp)
2485 pedwarn ("jump to label %q+D", decl);
2486 pedwarn (" from here");
2489 error (" exits OpenMP structured block");
2496 /* Check that a return is ok wrt OpenMP structured blocks.
2497 Called by finish_return_stmt. Returns true if all is well. */
2500 check_omp_return (void)
2502 struct cp_binding_level *b;
2503 for (b = current_binding_level; b ; b = b->level_chain)
2504 if (b->kind == sk_omp)
2506 error ("invalid exit from OpenMP structured block");
2512 /* Define a label, specifying the location in the source file.
2513 Return the LABEL_DECL node for the label. */
2516 define_label (location_t location, tree name)
2518 struct named_label_entry *ent, dummy;
2519 struct cp_binding_level *p;
2522 timevar_push (TV_NAME_LOOKUP);
2524 decl = lookup_label (name);
2526 dummy.label_decl = decl;
2527 ent = (struct named_label_entry *) htab_find (named_labels, &dummy);
2528 gcc_assert (ent != NULL);
2530 /* After labels, make any new cleanups in the function go into their
2531 own new (temporary) binding contour. */
2532 for (p = current_binding_level;
2533 p->kind != sk_function_parms;
2535 p->more_cleanups_ok = 0;
2537 if (name == get_identifier ("wchar_t"))
2538 pedwarn ("label named wchar_t");
2540 if (DECL_INITIAL (decl) != NULL_TREE)
2541 error ("duplicate label %qD", decl);
2544 struct named_label_use_entry *use;
2546 /* Mark label as having been defined. */
2547 DECL_INITIAL (decl) = error_mark_node;
2548 /* Say where in the source. */
2549 DECL_SOURCE_LOCATION (decl) = location;
2551 ent->binding_level = current_binding_level;
2552 ent->names_in_scope = current_binding_level->names;
2554 for (use = ent->uses; use ; use = use->next)
2555 check_previous_goto (decl, use);
2559 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, decl);
2564 struct cp_binding_level *level;
2565 struct cp_switch *next;
2566 /* The SWITCH_STMT being built. */
2568 /* A splay-tree mapping the low element of a case range to the high
2569 element, or NULL_TREE if there is no high element. Used to
2570 determine whether or not a new case label duplicates an old case
2571 label. We need a tree, rather than simply a hash table, because
2572 of the GNU case range extension. */
2576 /* A stack of the currently active switch statements. The innermost
2577 switch statement is on the top of the stack. There is no need to
2578 mark the stack for garbage collection because it is only active
2579 during the processing of the body of a function, and we never
2580 collect at that point. */
2582 static struct cp_switch *switch_stack;
2584 /* Called right after a switch-statement condition is parsed.
2585 SWITCH_STMT is the switch statement being parsed. */
2588 push_switch (tree switch_stmt)
2590 struct cp_switch *p = XNEW (struct cp_switch);
2591 p->level = current_binding_level;
2592 p->next = switch_stack;
2593 p->switch_stmt = switch_stmt;
2594 p->cases = splay_tree_new (case_compare, NULL, NULL);
2601 struct cp_switch *cs = switch_stack;
2602 location_t switch_location;
2604 /* Emit warnings as needed. */
2605 if (EXPR_HAS_LOCATION (cs->switch_stmt))
2606 switch_location = EXPR_LOCATION (cs->switch_stmt);
2608 switch_location = input_location;
2609 if (!processing_template_decl)
2610 c_do_switch_warnings (cs->cases, switch_location,
2611 SWITCH_STMT_TYPE (cs->switch_stmt),
2612 SWITCH_STMT_COND (cs->switch_stmt));
2614 splay_tree_delete (cs->cases);
2615 switch_stack = switch_stack->next;
2619 /* Note that we've seen a definition of a case label, and complain if this
2620 is a bad place for one. */
2623 finish_case_label (tree low_value, tree high_value)
2626 struct cp_binding_level *p;
2628 if (processing_template_decl)
2632 /* For templates, just add the case label; we'll do semantic
2633 analysis at instantiation-time. */
2634 label = build_decl (LABEL_DECL, NULL_TREE, NULL_TREE);
2635 return add_stmt (build_case_label (low_value, high_value, label));
2638 /* Find the condition on which this switch statement depends. */
2639 cond = SWITCH_STMT_COND (switch_stack->switch_stmt);
2640 if (cond && TREE_CODE (cond) == TREE_LIST)
2641 cond = TREE_VALUE (cond);
2643 if (!check_switch_goto (switch_stack->level))
2644 return error_mark_node;
2646 r = c_add_case_label (switch_stack->cases, cond, TREE_TYPE (cond),
2647 low_value, high_value);
2649 /* After labels, make any new cleanups in the function go into their
2650 own new (temporary) binding contour. */
2651 for (p = current_binding_level;
2652 p->kind != sk_function_parms;
2654 p->more_cleanups_ok = 0;
2659 /* Hash a TYPENAME_TYPE. K is really of type `tree'. */
2662 typename_hash (const void* k)
2667 hash = (htab_hash_pointer (TYPE_CONTEXT (t))
2668 ^ htab_hash_pointer (DECL_NAME (TYPE_NAME (t))));
2673 typedef struct typename_info {
2681 /* Compare two TYPENAME_TYPEs. K1 and K2 are really of type `tree'. */
2684 typename_compare (const void * k1, const void * k2)
2687 const typename_info *t2;
2690 t2 = (const typename_info *) k2;
2692 return (DECL_NAME (TYPE_NAME (t1)) == t2->name
2693 && TYPE_CONTEXT (t1) == t2->scope
2694 && TYPENAME_TYPE_FULLNAME (t1) == t2->template_id
2695 && TYPENAME_IS_ENUM_P (t1) == t2->enum_p
2696 && TYPENAME_IS_CLASS_P (t1) == t2->class_p);
2699 /* Build a TYPENAME_TYPE. If the type is `typename T::t', CONTEXT is
2700 the type of `T', NAME is the IDENTIFIER_NODE for `t'.
2702 Returns the new TYPENAME_TYPE. */
2704 static GTY ((param_is (union tree_node))) htab_t typename_htab;
2707 build_typename_type (tree context, tree name, tree fullname,
2708 enum tag_types tag_type)
2716 if (typename_htab == NULL)
2717 typename_htab = htab_create_ggc (61, &typename_hash,
2718 &typename_compare, NULL);
2720 ti.scope = FROB_CONTEXT (context);
2722 ti.template_id = fullname;
2723 ti.enum_p = tag_type == enum_type;
2724 ti.class_p = (tag_type == class_type
2725 || tag_type == record_type
2726 || tag_type == union_type);
2727 hash = (htab_hash_pointer (ti.scope)
2728 ^ htab_hash_pointer (ti.name));
2730 /* See if we already have this type. */
2731 e = htab_find_slot_with_hash (typename_htab, &ti, hash, INSERT);
2736 /* Build the TYPENAME_TYPE. */
2737 t = make_aggr_type (TYPENAME_TYPE);
2738 TYPE_CONTEXT (t) = ti.scope;
2739 TYPENAME_TYPE_FULLNAME (t) = ti.template_id;
2740 TYPENAME_IS_ENUM_P (t) = ti.enum_p;
2741 TYPENAME_IS_CLASS_P (t) = ti.class_p;
2743 /* Build the corresponding TYPE_DECL. */
2744 d = build_decl (TYPE_DECL, name, t);
2745 TYPE_NAME (TREE_TYPE (d)) = d;
2746 TYPE_STUB_DECL (TREE_TYPE (d)) = d;
2747 DECL_CONTEXT (d) = FROB_CONTEXT (context);
2748 DECL_ARTIFICIAL (d) = 1;
2750 /* Store it in the hash table. */
2757 /* Resolve `typename CONTEXT::NAME'. TAG_TYPE indicates the tag
2758 provided to name the type. Returns an appropriate type, unless an
2759 error occurs, in which case error_mark_node is returned. If we
2760 locate a non-artificial TYPE_DECL and TF_KEEP_TYPE_DECL is set, we
2761 return that, rather than the _TYPE it corresponds to, in other
2762 cases we look through the type decl. If TF_ERROR is set, complain
2763 about errors, otherwise be quiet. */
2766 make_typename_type (tree context, tree name, enum tag_types tag_type,
2767 tsubst_flags_t complain)
2771 if (name == error_mark_node
2772 || context == NULL_TREE
2773 || context == error_mark_node)
2774 return error_mark_node;
2778 if (!(TYPE_LANG_SPECIFIC (name)
2779 && (CLASSTYPE_IS_TEMPLATE (name)
2780 || CLASSTYPE_USE_TEMPLATE (name))))
2781 name = TYPE_IDENTIFIER (name);
2783 /* Create a TEMPLATE_ID_EXPR for the type. */
2784 name = build_nt (TEMPLATE_ID_EXPR,
2785 CLASSTYPE_TI_TEMPLATE (name),
2786 CLASSTYPE_TI_ARGS (name));
2788 else if (TREE_CODE (name) == TYPE_DECL)
2789 name = DECL_NAME (name);
2793 if (TREE_CODE (name) == TEMPLATE_ID_EXPR)
2795 name = TREE_OPERAND (name, 0);
2796 if (TREE_CODE (name) == TEMPLATE_DECL)
2797 name = TREE_OPERAND (fullname, 0) = DECL_NAME (name);
2799 if (TREE_CODE (name) == TEMPLATE_DECL)
2801 error ("%qD used without template parameters", name);
2802 return error_mark_node;
2804 gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE);
2805 gcc_assert (TYPE_P (context));
2807 if (!dependent_type_p (context)
2808 || currently_open_class (context))
2810 if (TREE_CODE (fullname) == TEMPLATE_ID_EXPR)
2812 tree tmpl = NULL_TREE;
2813 if (IS_AGGR_TYPE (context))
2814 tmpl = lookup_field (context, name, 0, false);
2815 if (!tmpl || !DECL_CLASS_TEMPLATE_P (tmpl))
2817 if (complain & tf_error)
2818 error ("no class template named %q#T in %q#T",
2820 return error_mark_node;
2823 if (complain & tf_error)
2824 perform_or_defer_access_check (TYPE_BINFO (context), tmpl);
2826 return lookup_template_class (tmpl,
2827 TREE_OPERAND (fullname, 1),
2829 /*entering_scope=*/0,
2830 tf_warning_or_error | tf_user);
2836 if (!IS_AGGR_TYPE (context))
2838 if (complain & tf_error)
2839 error ("no type named %q#T in %q#T", name, context);
2840 return error_mark_node;
2843 t = lookup_field (context, name, 0, true);
2846 if (TREE_CODE (t) != TYPE_DECL)
2848 if (complain & tf_error)
2849 error ("no type named %q#T in %q#T", name, context);
2850 return error_mark_node;
2853 if (complain & tf_error)
2854 perform_or_defer_access_check (TYPE_BINFO (context), t);
2856 if (DECL_ARTIFICIAL (t) || !(complain & tf_keep_type_decl))
2864 /* If the CONTEXT is not a template type, then either the field is
2865 there now or its never going to be. */
2866 if (!dependent_type_p (context))
2868 if (complain & tf_error)
2869 error ("no type named %q#T in %q#T", name, context);
2870 return error_mark_node;
2873 return build_typename_type (context, name, fullname, tag_type);
2876 /* Resolve `CONTEXT::template NAME'. Returns a TEMPLATE_DECL if the name
2877 can be resolved or an UNBOUND_CLASS_TEMPLATE, unless an error occurs,
2878 in which case error_mark_node is returned.
2880 If PARM_LIST is non-NULL, also make sure that the template parameter
2881 list of TEMPLATE_DECL matches.
2883 If COMPLAIN zero, don't complain about any errors that occur. */
2886 make_unbound_class_template (tree context, tree name, tree parm_list,
2887 tsubst_flags_t complain)
2893 name = TYPE_IDENTIFIER (name);
2894 else if (DECL_P (name))
2895 name = DECL_NAME (name);
2896 gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE);
2898 if (!dependent_type_p (context)
2899 || currently_open_class (context))
2901 tree tmpl = NULL_TREE;
2903 if (IS_AGGR_TYPE (context))
2904 tmpl = lookup_field (context, name, 0, false);
2906 if (!tmpl || !DECL_CLASS_TEMPLATE_P (tmpl))
2908 if (complain & tf_error)
2909 error ("no class template named %q#T in %q#T", name, context);
2910 return error_mark_node;
2914 && !comp_template_parms (DECL_TEMPLATE_PARMS (tmpl), parm_list))
2916 if (complain & tf_error)
2918 error ("template parameters do not match template");
2919 error ("%q+D declared here", tmpl);
2921 return error_mark_node;
2924 if (complain & tf_error)
2925 perform_or_defer_access_check (TYPE_BINFO (context), tmpl);
2930 /* Build the UNBOUND_CLASS_TEMPLATE. */
2931 t = make_aggr_type (UNBOUND_CLASS_TEMPLATE);
2932 TYPE_CONTEXT (t) = FROB_CONTEXT (context);
2933 TREE_TYPE (t) = NULL_TREE;
2935 /* Build the corresponding TEMPLATE_DECL. */
2936 d = build_decl (TEMPLATE_DECL, name, t);
2937 TYPE_NAME (TREE_TYPE (d)) = d;
2938 TYPE_STUB_DECL (TREE_TYPE (d)) = d;
2939 DECL_CONTEXT (d) = FROB_CONTEXT (context);
2940 DECL_ARTIFICIAL (d) = 1;
2941 DECL_TEMPLATE_PARMS (d) = parm_list;
2948 /* Push the declarations of builtin types into the namespace.
2949 RID_INDEX is the index of the builtin type in the array
2950 RID_POINTERS. NAME is the name used when looking up the builtin
2951 type. TYPE is the _TYPE node for the builtin type. */
2954 record_builtin_type (enum rid rid_index,
2958 tree rname = NULL_TREE, tname = NULL_TREE;
2959 tree tdecl = NULL_TREE;
2961 if ((int) rid_index < (int) RID_MAX)
2962 rname = ridpointers[(int) rid_index];
2964 tname = get_identifier (name);
2966 /* The calls to SET_IDENTIFIER_GLOBAL_VALUE below should be
2967 eliminated. Built-in types should not be looked up name; their
2968 names are keywords that the parser can recognize. However, there
2969 is code in c-common.c that uses identifier_global_value to look
2970 up built-in types by name. */
2973 tdecl = build_decl (TYPE_DECL, tname, type);
2974 DECL_ARTIFICIAL (tdecl) = 1;
2975 SET_IDENTIFIER_GLOBAL_VALUE (tname, tdecl);
2981 tdecl = build_decl (TYPE_DECL, rname, type);
2982 DECL_ARTIFICIAL (tdecl) = 1;
2984 SET_IDENTIFIER_GLOBAL_VALUE (rname, tdecl);
2987 if (!TYPE_NAME (type))
2988 TYPE_NAME (type) = tdecl;
2991 debug_hooks->type_decl (tdecl, 0);
2994 /* Record one of the standard Java types.
2995 * Declare it as having the given NAME.
2996 * If SIZE > 0, it is the size of one of the integral types;
2997 * otherwise it is the negative of the size of one of the other types. */
3000 record_builtin_java_type (const char* name, int size)
3004 type = make_signed_type (size);
3005 else if (size > -32)
3006 { /* "__java_char" or ""__java_boolean". */
3007 type = make_unsigned_type (-size);
3008 /*if (size == -1) TREE_SET_CODE (type, BOOLEAN_TYPE);*/
3011 { /* "__java_float" or ""__java_double". */
3012 type = make_node (REAL_TYPE);
3013 TYPE_PRECISION (type) = - size;
3016 record_builtin_type (RID_MAX, name, type);
3017 decl = TYPE_NAME (type);
3019 /* Suppress generate debug symbol entries for these types,
3020 since for normal C++ they are just clutter.
3021 However, push_lang_context undoes this if extern "Java" is seen. */
3022 DECL_IGNORED_P (decl) = 1;
3024 TYPE_FOR_JAVA (type) = 1;
3028 /* Push a type into the namespace so that the back-ends ignore it. */
3031 record_unknown_type (tree type, const char* name)
3033 tree decl = pushdecl (build_decl (TYPE_DECL, get_identifier (name), type));
3034 /* Make sure the "unknown type" typedecl gets ignored for debug info. */
3035 DECL_IGNORED_P (decl) = 1;
3036 TYPE_DECL_SUPPRESS_DEBUG (decl) = 1;
3037 TYPE_SIZE (type) = TYPE_SIZE (void_type_node);
3038 TYPE_ALIGN (type) = 1;
3039 TYPE_USER_ALIGN (type) = 0;
3040 TYPE_MODE (type) = TYPE_MODE (void_type_node);
3043 /* A string for which we should create an IDENTIFIER_NODE at
3046 typedef struct predefined_identifier
3048 /* The name of the identifier. */
3049 const char *const name;
3050 /* The place where the IDENTIFIER_NODE should be stored. */
3052 /* Nonzero if this is the name of a constructor or destructor. */
3053 const int ctor_or_dtor_p;
3054 } predefined_identifier;
3056 /* Create all the predefined identifiers. */
3059 initialize_predefined_identifiers (void)
3061 const predefined_identifier *pid;
3063 /* A table of identifiers to create at startup. */
3064 static const predefined_identifier predefined_identifiers[] = {
3065 { "C++", &lang_name_cplusplus, 0 },
3066 { "C", &lang_name_c, 0 },
3067 { "Java", &lang_name_java, 0 },
3068 /* Some of these names have a trailing space so that it is
3069 impossible for them to conflict with names written by users. */
3070 { "__ct ", &ctor_identifier, 1 },
3071 { "__base_ctor ", &base_ctor_identifier, 1 },
3072 { "__comp_ctor ", &complete_ctor_identifier, 1 },
3073 { "__dt ", &dtor_identifier, 1 },
3074 { "__comp_dtor ", &complete_dtor_identifier, 1 },
3075 { "__base_dtor ", &base_dtor_identifier, 1 },
3076 { "__deleting_dtor ", &deleting_dtor_identifier, 1 },
3077 { IN_CHARGE_NAME, &in_charge_identifier, 0 },
3078 { "nelts", &nelts_identifier, 0 },
3079 { THIS_NAME, &this_identifier, 0 },
3080 { VTABLE_DELTA_NAME, &delta_identifier, 0 },
3081 { VTABLE_PFN_NAME, &pfn_identifier, 0 },
3082 { "_vptr", &vptr_identifier, 0 },
3083 { "__vtt_parm", &vtt_parm_identifier, 0 },
3084 { "::", &global_scope_name, 0 },
3085 { "std", &std_identifier, 0 },
3089 for (pid = predefined_identifiers; pid->name; ++pid)
3091 *pid->node = get_identifier (pid->name);
3092 if (pid->ctor_or_dtor_p)
3093 IDENTIFIER_CTOR_OR_DTOR_P (*pid->node) = 1;
3097 /* Create the predefined scalar types of C,
3098 and some nodes representing standard constants (0, 1, (void *)0).
3099 Initialize the global binding level.
3100 Make definitions for built-in primitive functions. */
3103 cxx_init_decl_processing (void)
3106 tree void_ftype_ptr;
3108 build_common_tree_nodes (flag_signed_char, false);
3110 /* Create all the identifiers we need. */
3111 initialize_predefined_identifiers ();
3113 /* Create the global variables. */
3114 push_to_top_level ();
3116 current_function_decl = NULL_TREE;
3117 current_binding_level = NULL;
3118 /* Enter the global namespace. */
3119 gcc_assert (global_namespace == NULL_TREE);
3120 global_namespace = build_lang_decl (NAMESPACE_DECL, global_scope_name,
3122 begin_scope (sk_namespace, global_namespace);
3124 current_lang_name = NULL_TREE;
3126 /* Adjust various flags based on command-line settings. */
3127 if (!flag_permissive)
3128 flag_pedantic_errors = 1;
3129 if (!flag_no_inline)
3131 flag_inline_trees = 1;
3134 if (flag_inline_functions)
3135 flag_inline_trees = 2;
3137 /* Force minimum function alignment if using the least significant
3138 bit of function pointers to store the virtual bit. */
3139 if (TARGET_PTRMEMFUNC_VBIT_LOCATION == ptrmemfunc_vbit_in_pfn
3140 && force_align_functions_log < 1)
3141 force_align_functions_log = 1;
3144 current_lang_name = lang_name_c;
3146 /* Create the `std' namespace. */
3147 push_namespace (std_identifier);
3148 std_node = current_namespace;
3151 c_common_nodes_and_builtins ();
3153 java_byte_type_node = record_builtin_java_type ("__java_byte", 8);
3154 java_short_type_node = record_builtin_java_type ("__java_short", 16);
3155 java_int_type_node = record_builtin_java_type ("__java_int", 32);
3156 java_long_type_node = record_builtin_java_type ("__java_long", 64);
3157 java_float_type_node = record_builtin_java_type ("__java_float", -32);
3158 java_double_type_node = record_builtin_java_type ("__java_double", -64);
3159 java_char_type_node = record_builtin_java_type ("__java_char", -16);
3160 java_boolean_type_node = record_builtin_java_type ("__java_boolean", -1);
3162 integer_two_node = build_int_cst (NULL_TREE, 2);
3163 integer_three_node = build_int_cst (NULL_TREE, 3);
3165 record_builtin_type (RID_BOOL, "bool", boolean_type_node);
3166 truthvalue_type_node = boolean_type_node;
3167 truthvalue_false_node = boolean_false_node;
3168 truthvalue_true_node = boolean_true_node;
3170 empty_except_spec = build_tree_list (NULL_TREE, NULL_TREE);
3173 record_builtin_type (RID_MAX, NULL, string_type_node);
3176 delta_type_node = ptrdiff_type_node;
3177 vtable_index_type = ptrdiff_type_node;
3179 vtt_parm_type = build_pointer_type (const_ptr_type_node);
3180 void_ftype = build_function_type (void_type_node, void_list_node);
3181 void_ftype_ptr = build_function_type (void_type_node,
3182 tree_cons (NULL_TREE,
3186 = build_exception_variant (void_ftype_ptr, empty_except_spec);
3188 /* C++ extensions */
3190 unknown_type_node = make_node (UNKNOWN_TYPE);
3191 record_unknown_type (unknown_type_node, "unknown type");
3193 /* Indirecting an UNKNOWN_TYPE node yields an UNKNOWN_TYPE node. */
3194 TREE_TYPE (unknown_type_node) = unknown_type_node;
3196 /* Looking up TYPE_POINTER_TO and TYPE_REFERENCE_TO yield the same
3198 TYPE_POINTER_TO (unknown_type_node) = unknown_type_node;
3199 TYPE_REFERENCE_TO (unknown_type_node) = unknown_type_node;
3202 /* Make sure we get a unique function type, so we can give
3203 its pointer type a name. (This wins for gdb.) */
3204 tree vfunc_type = make_node (FUNCTION_TYPE);
3205 TREE_TYPE (vfunc_type) = integer_type_node;
3206 TYPE_ARG_TYPES (vfunc_type) = NULL_TREE;
3207 layout_type (vfunc_type);
3209 vtable_entry_type = build_pointer_type (vfunc_type);
3211 record_builtin_type (RID_MAX, VTBL_PTR_TYPE, vtable_entry_type);
3214 = build_cplus_array_type (vtable_entry_type, NULL_TREE);
3215 layout_type (vtbl_type_node);
3216 vtbl_type_node = build_qualified_type (vtbl_type_node, TYPE_QUAL_CONST);
3217 record_builtin_type (RID_MAX, NULL, vtbl_type_node);
3218 vtbl_ptr_type_node = build_pointer_type (vtable_entry_type);
3219 layout_type (vtbl_ptr_type_node);
3220 record_builtin_type (RID_MAX, NULL, vtbl_ptr_type_node);
3222 push_namespace (get_identifier ("__cxxabiv1"));
3223 abi_node = current_namespace;
3226 global_type_node = make_node (LANG_TYPE);
3227 record_unknown_type (global_type_node, "global type");
3230 current_lang_name = lang_name_cplusplus;
3234 tree bad_alloc_type_node;
3235 tree bad_alloc_decl;
3236 tree newtype, deltype;
3237 tree ptr_ftype_sizetype;
3239 push_namespace (std_identifier);
3240 bad_alloc_id = get_identifier ("bad_alloc");
3241 bad_alloc_type_node = make_aggr_type (RECORD_TYPE);
3242 TYPE_CONTEXT (bad_alloc_type_node) = current_namespace;
3244 = create_implicit_typedef (bad_alloc_id, bad_alloc_type_node);
3245 DECL_CONTEXT (bad_alloc_decl) = current_namespace;
3246 TYPE_STUB_DECL (bad_alloc_type_node) = bad_alloc_decl;
3250 = build_function_type (ptr_type_node,
3251 tree_cons (NULL_TREE,
3254 newtype = build_exception_variant
3255 (ptr_ftype_sizetype, add_exception_specifier
3256 (NULL_TREE, bad_alloc_type_node, -1));
3257 deltype = build_exception_variant (void_ftype_ptr, empty_except_spec);
3258 push_cp_library_fn (NEW_EXPR, newtype);
3259 push_cp_library_fn (VEC_NEW_EXPR, newtype);
3260 global_delete_fndecl = push_cp_library_fn (DELETE_EXPR, deltype);
3261 push_cp_library_fn (VEC_DELETE_EXPR, deltype);
3265 = build_library_fn_ptr ("__cxa_pure_virtual", void_ftype);
3267 /* Perform other language dependent initializations. */
3268 init_class_processing ();
3269 init_rtti_processing ();
3271 if (flag_exceptions)
3272 init_exception_processing ();
3274 if (! supports_one_only ())
3277 make_fname_decl = cp_make_fname_decl;
3278 start_fname_decls ();
3280 /* Show we use EH for cleanups. */
3281 if (flag_exceptions)
3282 using_eh_for_cleanups ();
3285 /* Generate an initializer for a function naming variable from
3286 NAME. NAME may be NULL, to indicate a dependent name. TYPE_P is
3287 filled in with the type of the init. */
3290 cp_fname_init (const char* name, tree *type_p)
3292 tree domain = NULL_TREE;
3294 tree init = NULL_TREE;
3299 length = strlen (name);
3300 domain = build_index_type (size_int (length));
3301 init = build_string (length + 1, name);
3304 type = build_qualified_type (char_type_node, TYPE_QUAL_CONST);
3305 type = build_cplus_array_type (type, domain);
3310 TREE_TYPE (init) = type;
3312 init = error_mark_node;
3317 /* Create the VAR_DECL for __FUNCTION__ etc. ID is the name to give the
3318 decl, NAME is the initialization string and TYPE_DEP indicates whether
3319 NAME depended on the type of the function. We make use of that to detect
3320 __PRETTY_FUNCTION__ inside a template fn. This is being done
3321 lazily at the point of first use, so we mustn't push the decl now. */
3324 cp_make_fname_decl (tree id, int type_dep)
3326 const char *const name = (type_dep && processing_template_decl
3327 ? NULL : fname_as_string (type_dep));
3329 tree init = cp_fname_init (name, &type);
3330 tree decl = build_decl (VAR_DECL, id, type);
3333 free ((char *) name);
3335 /* As we're using pushdecl_with_scope, we must set the context. */
3336 DECL_CONTEXT (decl) = current_function_decl;
3337 DECL_PRETTY_FUNCTION_P (decl) = type_dep;
3339 TREE_STATIC (decl) = 1;
3340 TREE_READONLY (decl) = 1;
3341 DECL_ARTIFICIAL (decl) = 1;
3343 TREE_USED (decl) = 1;
3345 if (current_function_decl)
3347 struct cp_binding_level *b = current_binding_level;
3348 while (b->level_chain->kind != sk_function_parms)
3350 pushdecl_with_scope (decl, b, /*is_friend=*/false);
3351 cp_finish_decl (decl, init, /*init_const_expr_p=*/false, NULL_TREE,
3352 LOOKUP_ONLYCONVERTING);
3355 pushdecl_top_level_and_finish (decl, init);
3360 /* Make a definition for a builtin function named NAME in the current
3361 namespace, whose data type is TYPE and whose context is CONTEXT.
3362 TYPE should be a function type with argument types.
3364 CLASS and CODE tell later passes how to compile calls to this function.
3365 See tree.h for possible values.
3367 If LIBNAME is nonzero, use that for DECL_ASSEMBLER_NAME,
3368 the name to be called if we can't opencode the function.
3369 If ATTRS is nonzero, use that for the function's attribute
3373 builtin_function_1 (const char* name,
3376 enum built_in_function code,
3377 enum built_in_class class,
3378 const char* libname,
3381 tree decl = build_library_fn_1 (get_identifier (name), ERROR_MARK, type);
3382 DECL_BUILT_IN_CLASS (decl) = class;
3383 DECL_FUNCTION_CODE (decl) = code;
3384 DECL_CONTEXT (decl) = context;
3388 /* Since `pushdecl' relies on DECL_ASSEMBLER_NAME instead of DECL_NAME,
3389 we cannot change DECL_ASSEMBLER_NAME until we have installed this
3390 function in the namespace. */
3392 SET_DECL_ASSEMBLER_NAME (decl, get_identifier (libname));
3394 /* A function in the user's namespace should have an explicit
3395 declaration before it is used. Mark the built-in function as
3396 anticipated but not actually declared. */
3397 if (name[0] != '_' || name[1] != '_')
3398 DECL_ANTICIPATED (decl) = 1;
3400 /* Possibly apply some default attributes to this built-in function. */
3402 decl_attributes (&decl, attrs, ATTR_FLAG_BUILT_IN);
3404 decl_attributes (&decl, NULL_TREE, 0);
3409 /* Entry point for the benefit of c_common_nodes_and_builtins.
3411 Make a definition for a builtin function named NAME and whose data type
3412 is TYPE. TYPE should be a function type with argument types. This
3413 function places the anticipated declaration in the global namespace
3414 and additionally in the std namespace if appropriate.
3416 CLASS and CODE tell later passes how to compile calls to this function.
3417 See tree.h for possible values.
3419 If LIBNAME is nonzero, use that for DECL_ASSEMBLER_NAME,
3420 the name to be called if we can't opencode the function.
3422 If ATTRS is nonzero, use that for the function's attribute
3426 builtin_function (const char* name,
3429 enum built_in_class cl,
3430 const char* libname,
3433 /* All builtins that don't begin with an '_' should additionally
3434 go in the 'std' namespace. */
3437 push_namespace (std_identifier);
3438 builtin_function_1 (name, type, std_node, code, cl, libname, attrs);
3442 return builtin_function_1 (name, type, NULL_TREE, code,
3443 cl, libname, attrs);
3446 /* Generate a FUNCTION_DECL with the typical flags for a runtime library
3447 function. Not called directly. */
3450 build_library_fn_1 (tree name, enum tree_code operator_code, tree type)
3452 tree fn = build_lang_decl (FUNCTION_DECL, name, type);
3453 DECL_EXTERNAL (fn) = 1;
3454 TREE_PUBLIC (fn) = 1;
3455 DECL_ARTIFICIAL (fn) = 1;
3456 SET_OVERLOADED_OPERATOR_CODE (fn, operator_code);
3457 SET_DECL_LANGUAGE (fn, lang_c);
3458 /* Runtime library routines are, by definition, available in an
3459 external shared object. */
3460 DECL_VISIBILITY (fn) = VISIBILITY_DEFAULT;
3461 DECL_VISIBILITY_SPECIFIED (fn) = 1;
3465 /* Returns the _DECL for a library function with C linkage.
3466 We assume that such functions never throw; if this is incorrect,
3467 callers should unset TREE_NOTHROW. */
3470 build_library_fn (tree name, tree type)
3472 tree fn = build_library_fn_1 (name, ERROR_MARK, type);
3473 TREE_NOTHROW (fn) = 1;
3477 /* Returns the _DECL for a library function with C++ linkage. */
3480 build_cp_library_fn (tree name, enum tree_code operator_code, tree type)
3482 tree fn = build_library_fn_1 (name, operator_code, type);
3483 TREE_NOTHROW (fn) = TYPE_NOTHROW_P (type);
3484 DECL_CONTEXT (fn) = FROB_CONTEXT (current_namespace);
3485 SET_DECL_LANGUAGE (fn, lang_cplusplus);
3489 /* Like build_library_fn, but takes a C string instead of an
3493 build_library_fn_ptr (const char* name, tree type)
3495 return build_library_fn (get_identifier (name), type);
3498 /* Like build_cp_library_fn, but takes a C string instead of an
3502 build_cp_library_fn_ptr (const char* name, tree type)
3504 return build_cp_library_fn (get_identifier (name), ERROR_MARK, type);
3507 /* Like build_library_fn, but also pushes the function so that we will
3508 be able to find it via IDENTIFIER_GLOBAL_VALUE. */
3511 push_library_fn (tree name, tree type)
3513 tree fn = build_library_fn (name, type);
3514 pushdecl_top_level (fn);
3518 /* Like build_cp_library_fn, but also pushes the function so that it
3519 will be found by normal lookup. */
3522 push_cp_library_fn (enum tree_code operator_code, tree type)
3524 tree fn = build_cp_library_fn (ansi_opname (operator_code),
3531 /* Like push_library_fn, but takes a TREE_LIST of parm types rather than
3535 push_void_library_fn (tree name, tree parmtypes)
3537 tree type = build_function_type (void_type_node, parmtypes);
3538 return push_library_fn (name, type);
3541 /* Like push_library_fn, but also note that this function throws
3542 and does not return. Used for __throw_foo and the like. */
3545 push_throw_library_fn (tree name, tree type)
3547 tree fn = push_library_fn (name, type);
3548 TREE_THIS_VOLATILE (fn) = 1;
3549 TREE_NOTHROW (fn) = 0;
3553 /* When we call finish_struct for an anonymous union, we create
3554 default copy constructors and such. But, an anonymous union
3555 shouldn't have such things; this function undoes the damage to the
3556 anonymous union type T.
3558 (The reason that we create the synthesized methods is that we don't
3559 distinguish `union { int i; }' from `typedef union { int i; } U'.
3560 The first is an anonymous union; the second is just an ordinary
3564 fixup_anonymous_aggr (tree t)
3568 /* Wipe out memory of synthesized methods. */
3569 TYPE_HAS_CONSTRUCTOR (t) = 0;
3570 TYPE_HAS_DEFAULT_CONSTRUCTOR (t) = 0;
3571 TYPE_HAS_INIT_REF (t) = 0;
3572 TYPE_HAS_CONST_INIT_REF (t) = 0;
3573 TYPE_HAS_ASSIGN_REF (t) = 0;
3574 TYPE_HAS_CONST_ASSIGN_REF (t) = 0;
3576 /* Splice the implicitly generated functions out of the TYPE_METHODS
3578 q = &TYPE_METHODS (t);
3581 if (DECL_ARTIFICIAL (*q))
3582 *q = TREE_CHAIN (*q);
3584 q = &TREE_CHAIN (*q);
3587 /* ISO C++ 9.5.3. Anonymous unions may not have function members. */
3588 if (TYPE_METHODS (t))
3589 error ("%Jan anonymous union cannot have function members",
3590 TYPE_MAIN_DECL (t));
3592 /* Anonymous aggregates cannot have fields with ctors, dtors or complex
3593 assignment operators (because they cannot have these methods themselves).
3594 For anonymous unions this is already checked because they are not allowed
3595 in any union, otherwise we have to check it. */
3596 if (TREE_CODE (t) != UNION_TYPE)
3600 for (field = TYPE_FIELDS (t); field; field = TREE_CHAIN (field))
3601 if (TREE_CODE (field) == FIELD_DECL)
3603 type = TREE_TYPE (field);
3604 if (CLASS_TYPE_P (type))
3606 if (TYPE_NEEDS_CONSTRUCTING (type))
3607 error ("member %q+#D with constructor not allowed "
3608 "in anonymous aggregate", field);
3609 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type))
3610 error ("member %q+#D with destructor not allowed "
3611 "in anonymous aggregate", field);
3612 if (TYPE_HAS_COMPLEX_ASSIGN_REF (type))
3613 error ("member %q+#D with copy assignment operator "
3614 "not allowed in anonymous aggregate", field);
3620 /* Make sure that a declaration with no declarator is well-formed, i.e.
3621 just declares a tagged type or anonymous union.
3623 Returns the type declared; or NULL_TREE if none. */
3626 check_tag_decl (cp_decl_specifier_seq *declspecs)
3628 int saw_friend = declspecs->specs[(int)ds_friend] != 0;
3629 int saw_typedef = declspecs->specs[(int)ds_typedef] != 0;
3630 /* If a class, struct, or enum type is declared by the DECLSPECS
3631 (i.e, if a class-specifier, enum-specifier, or non-typename
3632 elaborated-type-specifier appears in the DECLSPECS),
3633 DECLARED_TYPE is set to the corresponding type. */
3634 tree declared_type = NULL_TREE;
3635 bool error_p = false;
3637 if (declspecs->multiple_types_p)
3638 error ("multiple types in one declaration");
3639 else if (declspecs->redefined_builtin_type)
3641 if (!in_system_header)
3642 pedwarn ("redeclaration of C++ built-in type %qT",
3643 declspecs->redefined_builtin_type);
3648 && TYPE_P (declspecs->type)
3649 && ((TREE_CODE (declspecs->type) != TYPENAME_TYPE
3650 && IS_AGGR_TYPE (declspecs->type))
3651 || TREE_CODE (declspecs->type) == ENUMERAL_TYPE))
3652 declared_type = declspecs->type;
3653 else if (declspecs->type == error_mark_node)
3655 if (declared_type == NULL_TREE && ! saw_friend && !error_p)
3656 pedwarn ("declaration does not declare anything");
3657 /* Check for an anonymous union. */
3658 else if (declared_type && IS_AGGR_TYPE_CODE (TREE_CODE (declared_type))
3659 && TYPE_ANONYMOUS_P (declared_type))
3661 /* 7/3 In a simple-declaration, the optional init-declarator-list
3662 can be omitted only when declaring a class (clause 9) or
3663 enumeration (7.2), that is, when the decl-specifier-seq contains
3664 either a class-specifier, an elaborated-type-specifier with
3665 a class-key (9.1), or an enum-specifier. In these cases and
3666 whenever a class-specifier or enum-specifier is present in the
3667 decl-specifier-seq, the identifiers in these specifiers are among
3668 the names being declared by the declaration (as class-name,
3669 enum-names, or enumerators, depending on the syntax). In such
3670 cases, and except for the declaration of an unnamed bit-field (9.6),
3671 the decl-specifier-seq shall introduce one or more names into the
3672 program, or shall redeclare a name introduced by a previous
3673 declaration. [Example:
3674 enum { }; // ill-formed
3675 typedef class { }; // ill-formed
3679 error ("missing type-name in typedef-declaration");
3682 /* Anonymous unions are objects, so they can have specifiers. */;
3683 SET_ANON_AGGR_TYPE_P (declared_type);
3685 if (TREE_CODE (declared_type) != UNION_TYPE && pedantic
3686 && !in_system_header)
3687 pedwarn ("ISO C++ prohibits anonymous structs");
3692 if (declspecs->specs[(int)ds_inline]
3693 || declspecs->specs[(int)ds_virtual])
3694 error ("%qs can only be specified for functions",
3695 declspecs->specs[(int)ds_inline]
3696 ? "inline" : "virtual");
3698 && (!current_class_type
3699 || current_scope () != current_class_type))
3700 error ("%<friend%> can only be specified inside a class");
3701 else if (declspecs->specs[(int)ds_explicit])
3702 error ("%<explicit%> can only be specified for constructors");
3703 else if (declspecs->storage_class)
3704 error ("a storage class can only be specified for objects "
3706 else if (declspecs->specs[(int)ds_const]
3707 || declspecs->specs[(int)ds_volatile]
3708 || declspecs->specs[(int)ds_restrict]
3709 || declspecs->specs[(int)ds_thread])
3710 error ("qualifiers can only be specified for objects "
3714 return declared_type;
3717 /* Called when a declaration is seen that contains no names to declare.
3718 If its type is a reference to a structure, union or enum inherited
3719 from a containing scope, shadow that tag name for the current scope
3720 with a forward reference.
3721 If its type defines a new named structure or union
3722 or defines an enum, it is valid but we need not do anything here.
3723 Otherwise, it is an error.
3725 C++: may have to grok the declspecs to learn about static,
3726 complain for anonymous unions.
3728 Returns the TYPE declared -- or NULL_TREE if none. */
3731 shadow_tag (cp_decl_specifier_seq *declspecs)
3733 tree t = check_tag_decl (declspecs);
3738 if (declspecs->attributes)
3740 warning (0, "attribute ignored in declaration of %q+#T", t);
3741 warning (0, "attribute for %q+#T must follow the %qs keyword",
3742 t, class_key_or_enum_as_string (t));
3746 maybe_process_partial_specialization (t);
3748 /* This is where the variables in an anonymous union are
3749 declared. An anonymous union declaration looks like:
3751 because there is no declarator after the union, the parser
3752 sends that declaration here. */
3753 if (ANON_AGGR_TYPE_P (t))
3755 fixup_anonymous_aggr (t);
3757 if (TYPE_FIELDS (t))
3759 tree decl = grokdeclarator (/*declarator=*/NULL,
3760 declspecs, NORMAL, 0, NULL);
3761 finish_anon_union (decl);
3768 /* Decode a "typename", such as "int **", returning a ..._TYPE node. */
3771 groktypename (cp_decl_specifier_seq *type_specifiers,
3772 const cp_declarator *declarator)
3776 attrs = type_specifiers->attributes;
3777 type_specifiers->attributes = NULL_TREE;
3778 type = grokdeclarator (declarator, type_specifiers, TYPENAME, 0, &attrs);
3780 cplus_decl_attributes (&type, attrs, 0);
3784 /* Decode a declarator in an ordinary declaration or data definition.
3785 This is called as soon as the type information and variable name
3786 have been parsed, before parsing the initializer if any.
3787 Here we create the ..._DECL node, fill in its type,
3788 and put it on the list of decls for the current context.
3789 The ..._DECL node is returned as the value.
3791 Exception: for arrays where the length is not specified,
3792 the type is left null, to be filled in by `cp_finish_decl'.
3794 Function definitions do not come here; they go to start_function
3795 instead. However, external and forward declarations of functions
3796 do go through here. Structure field declarations are done by
3797 grokfield and not through here. */
3800 start_decl (const cp_declarator *declarator,
3801 cp_decl_specifier_seq *declspecs,
3804 tree prefix_attributes,
3805 tree *pushed_scope_p)
3811 *pushed_scope_p = NULL_TREE;
3813 /* An object declared as __attribute__((deprecated)) suppresses
3814 warnings of uses of other deprecated items. */
3815 if (lookup_attribute ("deprecated", attributes))
3816 deprecated_state = DEPRECATED_SUPPRESS;
3818 attributes = chainon (attributes, prefix_attributes);
3820 decl = grokdeclarator (declarator, declspecs, NORMAL, initialized,
3823 deprecated_state = DEPRECATED_NORMAL;
3825 if (decl == NULL_TREE || TREE_CODE (decl) == VOID_TYPE
3826 || decl == error_mark_node)
3827 return error_mark_node;
3829 type = TREE_TYPE (decl);
3831 context = DECL_CONTEXT (decl);
3835 *pushed_scope_p = push_scope (context);
3837 /* We are only interested in class contexts, later. */
3838 if (TREE_CODE (context) == NAMESPACE_DECL)
3839 context = NULL_TREE;
3843 /* Is it valid for this decl to have an initializer at all?
3844 If not, set INITIALIZED to zero, which will indirectly
3845 tell `cp_finish_decl' to ignore the initializer once it is parsed. */
3846 switch (TREE_CODE (decl))
3849 error ("typedef %qD is initialized (use __typeof__ instead)", decl);
3854 error ("function %q#D is initialized like a variable", decl);
3864 if (! toplevel_bindings_p ()
3865 && DECL_EXTERNAL (decl))
3866 warning (0, "declaration of %q#D has %<extern%> and is initialized",
3868 DECL_EXTERNAL (decl) = 0;
3869 if (toplevel_bindings_p ())
3870 TREE_STATIC (decl) = 1;
3873 /* Set attributes here so if duplicate decl, will have proper attributes. */
3874 cplus_decl_attributes (&decl, attributes, 0);
3876 /* Dllimported symbols cannot be defined. Static data members (which
3877 can be initialized in-class and dllimported) go through grokfield,
3878 not here, so we don't need to exclude those decls when checking for
3880 if (initialized && DECL_DLLIMPORT_P (decl))
3882 error ("definition of %q#D is marked %<dllimport%>", decl);
3883 DECL_DLLIMPORT_P (decl) = 0;
3886 /* If #pragma weak was used, mark the decl weak now. */
3887 maybe_apply_pragma_weak (decl);
3889 if (TREE_CODE (decl) == FUNCTION_DECL
3890 && DECL_DECLARED_INLINE_P (decl)
3891 && DECL_UNINLINABLE (decl)
3892 && lookup_attribute ("noinline", DECL_ATTRIBUTES (decl)))
3893 warning (0, "inline function %q+D given attribute noinline", decl);
3895 if (context && COMPLETE_TYPE_P (complete_type (context)))
3897 if (TREE_CODE (decl) == VAR_DECL)
3899 tree field = lookup_field (context, DECL_NAME (decl), 0, false);
3900 if (field == NULL_TREE || TREE_CODE (field) != VAR_DECL)
3901 error ("%q#D is not a static member of %q#T", decl, context);
3904 if (DECL_CONTEXT (field) != context)
3906 if (!same_type_p (DECL_CONTEXT (field), context))
3907 pedwarn ("ISO C++ does not permit %<%T::%D%> "
3908 "to be defined as %<%T::%D%>",
3909 DECL_CONTEXT (field), DECL_NAME (decl),
3910 context, DECL_NAME (decl));
3911 DECL_CONTEXT (decl) = DECL_CONTEXT (field);
3913 if (processing_specialization
3914 && template_class_depth (context) == 0
3915 && CLASSTYPE_TEMPLATE_SPECIALIZATION (context))
3916 error ("template header not allowed in member definition "
3917 "of explicitly specialized class");
3918 /* Static data member are tricky; an in-class initialization
3919 still doesn't provide a definition, so the in-class
3920 declaration will have DECL_EXTERNAL set, but will have an
3921 initialization. Thus, duplicate_decls won't warn
3922 about this situation, and so we check here. */
3923 if (initialized && DECL_INITIALIZED_IN_CLASS_P (field))
3924 error ("duplicate initialization of %qD", decl);
3925 if (duplicate_decls (decl, field, /*newdecl_is_friend=*/false))
3931 tree field = check_classfn (context, decl,
3932 (processing_template_decl
3933 > template_class_depth (context))
3934 ? current_template_parms
3936 if (field && duplicate_decls (decl, field,
3937 /*newdecl_is_friend=*/false))
3941 /* cp_finish_decl sets DECL_EXTERNAL if DECL_IN_AGGR_P is set. */
3942 DECL_IN_AGGR_P (decl) = 0;
3943 /* Do not mark DECL as an explicit specialization if it was not
3944 already marked as an instantiation; a declaration should
3945 never be marked as a specialization unless we know what
3946 template is being specialized. */
3947 if (DECL_LANG_SPECIFIC (decl) && DECL_USE_TEMPLATE (decl))
3949 SET_DECL_TEMPLATE_SPECIALIZATION (decl);
3951 /* [temp.expl.spec] An explicit specialization of a static data
3952 member of a template is a definition if the declaration
3953 includes an initializer; otherwise, it is a declaration.
3955 We check for processing_specialization so this only applies
3956 to the new specialization syntax. */
3957 if (!initialized && processing_specialization)
3958 DECL_EXTERNAL (decl) = 1;
3961 if (DECL_EXTERNAL (decl) && ! DECL_TEMPLATE_SPECIALIZATION (decl))
3962 pedwarn ("declaration of %q#D outside of class is not definition",
3966 /* Enter this declaration into the symbol table. */
3967 tem = maybe_push_decl (decl);
3969 if (processing_template_decl)
3970 tem = push_template_decl (tem);
3971 if (tem == error_mark_node)
3972 return error_mark_node;
3974 /* Tell the back-end to use or not use .common as appropriate. If we say
3975 -fconserve-space, we want this to save .data space, at the expense of
3976 wrong semantics. If we say -fno-conserve-space, we want this to
3977 produce errors about redefs; to do this we force variables into the
3979 if (flag_conserve_space
3980 && TREE_CODE (tem) == VAR_DECL
3981 && TREE_PUBLIC (tem)
3982 && !DECL_THREAD_LOCAL_P (tem)
3983 && !have_global_bss_p ())
3984 DECL_COMMON (tem) = 1;
3986 if (!processing_template_decl && TREE_CODE (tem) == VAR_DECL)
3987 start_decl_1 (tem, initialized);
3993 start_decl_1 (tree decl, bool initialized)
3997 gcc_assert (!processing_template_decl);
3999 if (error_operand_p (decl))
4002 gcc_assert (TREE_CODE (decl) == VAR_DECL);
4003 type = TREE_TYPE (decl);
4006 /* Is it valid for this decl to have an initializer at all?
4007 If not, set INITIALIZED to zero, which will indirectly
4008 tell `cp_finish_decl' to ignore the initializer once it is parsed. */
4010 /* Don't allow initializations for incomplete types except for
4011 arrays which might be completed by the initialization. */
4012 if (COMPLETE_TYPE_P (complete_type (type)))
4013 ; /* A complete type is ok. */
4014 else if (TREE_CODE (type) != ARRAY_TYPE)
4016 error ("variable %q#D has initializer but incomplete type", decl);
4018 type = TREE_TYPE (decl) = error_mark_node;
4020 else if (!COMPLETE_TYPE_P (complete_type (TREE_TYPE (type))))
4022 if (DECL_LANG_SPECIFIC (decl) && DECL_TEMPLATE_INFO (decl))
4023 error ("elements of array %q#D have incomplete type", decl);
4024 /* else we already gave an error in start_decl. */
4028 else if (IS_AGGR_TYPE (type)
4029 && ! DECL_EXTERNAL (decl))
4031 if (!COMPLETE_TYPE_P (complete_type (type)))
4033 error ("aggregate %q#D has incomplete type and cannot be defined",
4035 /* Change the type so that assemble_variable will give
4036 DECL an rtl we can live with: (mem (const_int 0)). */
4037 type = TREE_TYPE (decl) = error_mark_node;
4041 /* If any base type in the hierarchy of TYPE needs a constructor,
4042 then we set initialized to 1. This way any nodes which are
4043 created for the purposes of initializing this aggregate
4044 will live as long as it does. This is necessary for global
4045 aggregates which do not have their initializers processed until
4046 the end of the file. */
4047 initialized = TYPE_NEEDS_CONSTRUCTING (type);
4051 /* Create a new scope to hold this declaration if necessary.
4052 Whether or not a new scope is necessary cannot be determined
4053 until after the type has been completed; if the type is a
4054 specialization of a class template it is not until after
4055 instantiation has occurred that TYPE_HAS_NONTRIVIAL_DESTRUCTOR
4056 will be set correctly. */
4057 maybe_push_cleanup_level (type);
4060 /* Handle initialization of references. DECL, TYPE, and INIT have the
4061 same meaning as in cp_finish_decl. *CLEANUP must be NULL on entry,
4062 but will be set to a new CLEANUP_STMT if a temporary is created
4063 that must be destroyed subsequently.
4065 Returns an initializer expression to use to initialize DECL, or
4066 NULL if the initialization can be performed statically.
4068 Quotes on semantics can be found in ARM 8.4.3. */
4071 grok_reference_init (tree decl, tree type, tree init, tree *cleanup)
4075 if (init == NULL_TREE)
4077 if ((DECL_LANG_SPECIFIC (decl) == 0
4078 || DECL_IN_AGGR_P (decl) == 0)
4079 && ! DECL_THIS_EXTERN (decl))
4080 error ("%qD declared as reference but not initialized", decl);
4084 if (TREE_CODE (init) == CONSTRUCTOR)
4086 error ("ISO C++ forbids use of initializer list to "
4087 "initialize reference %qD", decl);
4091 if (TREE_CODE (init) == TREE_LIST)
4092 init = build_x_compound_expr_from_list (init, "initializer");
4094 if (TREE_CODE (TREE_TYPE (type)) != ARRAY_TYPE
4095 && TREE_CODE (TREE_TYPE (init)) == ARRAY_TYPE)
4096 /* Note: default conversion is only called in very special cases. */
4097 init = decay_conversion (init);
4099 /* Convert INIT to the reference type TYPE. This may involve the
4100 creation of a temporary, whose lifetime must be the same as that
4101 of the reference. If so, a DECL_EXPR for the temporary will be
4102 added just after the DECL_EXPR for DECL. That's why we don't set
4103 DECL_INITIAL for local references (instead assigning to them
4104 explicitly); we need to allow the temporary to be initialized
4106 tmp = initialize_reference (type, init, decl, cleanup);
4108 if (tmp == error_mark_node)
4110 else if (tmp == NULL_TREE)
4112 error ("cannot initialize %qT from %qT", type, TREE_TYPE (init));
4116 if (TREE_STATIC (decl) && !TREE_CONSTANT (tmp))
4119 DECL_INITIAL (decl) = tmp;
4124 /* When parsing `int a[] = {1, 2};' we don't know the size of the
4125 array until we finish parsing the initializer. If that's the
4126 situation we're in, update DECL accordingly. */
4129 maybe_deduce_size_from_array_init (tree decl, tree init)
4131 tree type = TREE_TYPE (decl);
4133 if (TREE_CODE (type) == ARRAY_TYPE
4134 && TYPE_DOMAIN (type) == NULL_TREE
4135 && TREE_CODE (decl) != TYPE_DECL)
4137 /* do_default is really a C-ism to deal with tentative definitions.
4138 But let's leave it here to ease the eventual merge. */
4139 int do_default = !DECL_EXTERNAL (decl);
4140 tree initializer = init ? init : DECL_INITIAL (decl);
4141 int failure = cp_complete_array_type (&TREE_TYPE (decl), initializer,
4146 error ("initializer fails to determine size of %qD", decl);
4147 TREE_TYPE (decl) = error_mark_node;
4149 else if (failure == 2)
4153 error ("array size missing in %qD", decl);
4154 TREE_TYPE (decl) = error_mark_node;
4156 /* If a `static' var's size isn't known, make it extern as
4157 well as static, so it does not get allocated. If it's not
4158 `static', then don't mark it extern; finish_incomplete_decl
4159 will give it a default size and it will get allocated. */
4160 else if (!pedantic && TREE_STATIC (decl) && !TREE_PUBLIC (decl))
4161 DECL_EXTERNAL (decl) = 1;
4163 else if (failure == 3)
4165 error ("zero-size array %qD", decl);
4166 TREE_TYPE (decl) = error_mark_node;
4169 cp_apply_type_quals_to_decl (cp_type_quals (TREE_TYPE (decl)), decl);
4171 layout_decl (decl, 0);
4175 /* Set DECL_SIZE, DECL_ALIGN, etc. for DECL (a VAR_DECL), and issue
4176 any appropriate error messages regarding the layout. */
4179 layout_var_decl (tree decl)
4183 if (TREE_STATIC (decl)
4184 && !DECL_ARTIFICIAL (decl)
4185 && current_function_decl
4186 && DECL_CONTEXT (decl) == current_function_decl)
4187 push_local_name (decl);
4189 type = TREE_TYPE (decl);
4190 if (type == error_mark_node)
4193 /* If we haven't already layed out this declaration, do so now.
4194 Note that we must not call complete type for an external object
4195 because it's type might involve templates that we are not
4196 supposed to instantiate yet. (And it's perfectly valid to say
4197 `extern X x' for some incomplete type `X'.) */
4198 if (!DECL_EXTERNAL (decl))
4199 complete_type (type);
4200 if (!DECL_SIZE (decl)
4201 && TREE_TYPE (decl) != error_mark_node
4202 && (COMPLETE_TYPE_P (type)
4203 || (TREE_CODE (type) == ARRAY_TYPE
4204 && !TYPE_DOMAIN (type)
4205 && COMPLETE_TYPE_P (TREE_TYPE (type)))))
4206 layout_decl (decl, 0);
4208 if (!DECL_EXTERNAL (decl) && DECL_SIZE (decl) == NULL_TREE)
4210 /* An automatic variable with an incomplete type: that is an error.
4211 Don't talk about array types here, since we took care of that
4212 message in grokdeclarator. */
4213 error ("storage size of %qD isn't known", decl);
4214 TREE_TYPE (decl) = error_mark_node;
4217 /* Keep this code around in case we later want to control debug info
4218 based on whether a type is "used". (jason 1999-11-11) */
4220 else if (!DECL_EXTERNAL (decl) && IS_AGGR_TYPE (ttype))
4221 /* Let debugger know it should output info for this type. */
4222 note_debug_info_needed (ttype);
4224 if (TREE_STATIC (decl) && DECL_CLASS_SCOPE_P (decl))
4225 note_debug_info_needed (DECL_CONTEXT (decl));
4228 if ((DECL_EXTERNAL (decl) || TREE_STATIC (decl))
4229 && DECL_SIZE (decl) != NULL_TREE
4230 && ! TREE_CONSTANT (DECL_SIZE (decl)))
4232 if (TREE_CODE (DECL_SIZE (decl)) == INTEGER_CST)
4233 constant_expression_warning (DECL_SIZE (decl));
4235 error ("storage size of %qD isn't constant", decl);
4239 /* If a local static variable is declared in an inline function, or if
4240 we have a weak definition, we must endeavor to create only one
4241 instance of the variable at link-time. */
4244 maybe_commonize_var (tree decl)
4246 /* Static data in a function with comdat linkage also has comdat
4248 if (TREE_STATIC (decl)
4249 /* Don't mess with __FUNCTION__. */
4250 && ! DECL_ARTIFICIAL (decl)
4251 && DECL_FUNCTION_SCOPE_P (decl)
4252 /* Unfortunately, import_export_decl has not always been called
4253 before the function is processed, so we cannot simply check
4255 && (DECL_COMDAT (DECL_CONTEXT (decl))
4256 || ((DECL_DECLARED_INLINE_P (DECL_CONTEXT (decl))
4257 || DECL_TEMPLATE_INSTANTIATION (DECL_CONTEXT (decl)))
4258 && TREE_PUBLIC (DECL_CONTEXT (decl)))))
4262 /* With weak symbols, we simply make the variable COMDAT;
4263 that will cause copies in multiple translations units to
4265 comdat_linkage (decl);
4269 if (DECL_INITIAL (decl) == NULL_TREE
4270 || DECL_INITIAL (decl) == error_mark_node)
4272 /* Without weak symbols, we can use COMMON to merge
4273 uninitialized variables. */
4274 TREE_PUBLIC (decl) = 1;
4275 DECL_COMMON (decl) = 1;
4279 /* While for initialized variables, we must use internal
4280 linkage -- which means that multiple copies will not
4282 TREE_PUBLIC (decl) = 0;
4283 DECL_COMMON (decl) = 0;
4284 warning (0, "sorry: semantics of inline function static "
4285 "data %q+#D are wrong (you'll wind up "
4286 "with multiple copies)", decl);
4287 warning (0, "%J you can work around this by removing "
4293 else if (DECL_LANG_SPECIFIC (decl) && DECL_COMDAT (decl))
4294 /* Set it up again; we might have set DECL_INITIAL since the last
4296 comdat_linkage (decl);
4299 /* Issue an error message if DECL is an uninitialized const variable. */
4302 check_for_uninitialized_const_var (tree decl)
4304 tree type = TREE_TYPE (decl);
4306 /* ``Unless explicitly declared extern, a const object does not have
4307 external linkage and must be initialized. ($8.4; $12.1)'' ARM
4309 if (TREE_CODE (decl) == VAR_DECL
4310 && TREE_CODE (type) != REFERENCE_TYPE
4311 && CP_TYPE_CONST_P (type)
4312 && !TYPE_NEEDS_CONSTRUCTING (type)
4313 && !DECL_INITIAL (decl))
4314 error ("uninitialized const %qD", decl);
4318 /* Structure holding the current initializer being processed by reshape_init.
4319 CUR is a pointer to the current element being processed, END is a pointer
4320 after the last element present in the initializer. */
4321 typedef struct reshape_iterator_t
4323 constructor_elt *cur;
4324 constructor_elt *end;
4327 static tree reshape_init_r (tree, reshape_iter *, bool);
4329 /* FIELD is a FIELD_DECL or NULL. In the former case, the value
4330 returned is the next FIELD_DECL (possibly FIELD itself) that can be
4331 initialized. If there are no more such fields, the return value
4335 next_initializable_field (tree field)
4338 && (TREE_CODE (field) != FIELD_DECL
4339 || (DECL_C_BIT_FIELD (field) && !DECL_NAME (field))
4340 || DECL_ARTIFICIAL (field)))
4341 field = TREE_CHAIN (field);
4346 /* Subroutine of reshape_init_array and reshape_init_vector, which does
4347 the actual work. ELT_TYPE is the element type of the array. MAX_INDEX is an
4348 INTEGER_CST representing the size of the array minus one (the maximum index),
4349 or NULL_TREE if the array was declared without specifying the size. D is
4350 the iterator within the constructor. */
4353 reshape_init_array_1 (tree elt_type, tree max_index, reshape_iter *d)
4356 bool sized_array_p = (max_index != NULL_TREE);
4357 unsigned HOST_WIDE_INT max_index_cst = 0;
4358 unsigned HOST_WIDE_INT index;
4360 /* The initializer for an array is always a CONSTRUCTOR. */
4361 new_init = build_constructor (NULL_TREE, NULL);
4365 /* Minus 1 is used for zero sized arrays. */
4366 if (integer_all_onesp (max_index))
4369 if (host_integerp (max_index, 1))
4370 max_index_cst = tree_low_cst (max_index, 1);
4371 /* sizetype is sign extended, not zero extended. */
4373 max_index_cst = tree_low_cst (fold_convert (size_type_node, max_index),
4377 /* Loop until there are no more initializers. */
4379 d->cur != d->end && (!sized_array_p || index <= max_index_cst);
4386 /* Handle array designated initializers (GNU extension). */
4387 if (TREE_CODE (d->cur->index) == IDENTIFIER_NODE)
4389 error ("name %qD used in a GNU-style designated "
4390 "initializer for an array", d->cur->index);
4396 elt_init = reshape_init_r (elt_type, d, /*first_initializer_p=*/false);
4397 if (elt_init == error_mark_node)
4398 return error_mark_node;
4399 CONSTRUCTOR_APPEND_ELT (CONSTRUCTOR_ELTS (new_init), NULL_TREE, elt_init);
4405 /* Subroutine of reshape_init_r, processes the initializers for arrays.
4406 Parameters are the same of reshape_init_r. */
4409 reshape_init_array (tree type, reshape_iter *d)
4411 tree max_index = NULL_TREE;
4413 gcc_assert (TREE_CODE (type) == ARRAY_TYPE);
4415 if (TYPE_DOMAIN (type))
4416 max_index = array_type_nelts (type);
4418 return reshape_init_array_1 (TREE_TYPE (type), max_index, d);
4421 /* Subroutine of reshape_init_r, processes the initializers for vectors.
4422 Parameters are the same of reshape_init_r. */
4425 reshape_init_vector (tree type, reshape_iter *d)
4427 tree max_index = NULL_TREE;
4430 gcc_assert (TREE_CODE (type) == VECTOR_TYPE);
4432 if (COMPOUND_LITERAL_P (d->cur->value))
4434 tree value = d->cur->value;
4435 if (!same_type_p (TREE_TYPE (value), type))
4437 error ("invalid type %qT as initializer for a vector of type %qT",
4438 TREE_TYPE (d->cur->value), type);
4439 value = error_mark_node;
4445 /* For a vector, the representation type is a struct
4446 containing a single member which is an array of the
4447 appropriate size. */
4448 rtype = TYPE_DEBUG_REPRESENTATION_TYPE (type);
4449 if (rtype && TYPE_DOMAIN (TREE_TYPE (TYPE_FIELDS (rtype))))
4450 max_index = array_type_nelts (TREE_TYPE (TYPE_FIELDS (rtype)));
4452 return reshape_init_array_1 (TREE_TYPE (type), max_index, d);
4455 /* Subroutine of reshape_init_r, processes the initializers for classes
4456 or union. Parameters are the same of reshape_init_r. */
4459 reshape_init_class (tree type, reshape_iter *d, bool first_initializer_p)
4464 gcc_assert (CLASS_TYPE_P (type));
4466 /* The initializer for a class is always a CONSTRUCTOR. */
4467 new_init = build_constructor (NULL_TREE, NULL);
4468 field = next_initializable_field (TYPE_FIELDS (type));
4474 An initializer for an aggregate member that is an
4475 empty class shall have the form of an empty
4476 initializer-list {}. */
4477 if (!first_initializer_p)
4479 error ("initializer for %qT must be brace-enclosed", type);
4480 return error_mark_node;
4485 /* Loop through the initializable fields, gathering initializers. */
4486 while (d->cur != d->end)
4490 /* Handle designated initializers, as an extension. */
4494 pedwarn ("ISO C++ does not allow designated initializers");
4496 field = lookup_field_1 (type, d->cur->index, /*want_type=*/false);
4498 if (!field || TREE_CODE (field) != FIELD_DECL)
4499 error ("%qT has no non-static data member named %qD", type,
4503 /* If we processed all the member of the class, we are done. */
4507 field_init = reshape_init_r (TREE_TYPE (field), d,
4508 /*first_initializer_p=*/false);
4509 CONSTRUCTOR_APPEND_ELT (CONSTRUCTOR_ELTS (new_init), field, field_init);
4513 When a union is initialized with a brace-enclosed
4514 initializer, the braces shall only contain an
4515 initializer for the first member of the union. */
4516 if (TREE_CODE (type) == UNION_TYPE)
4519 field = next_initializable_field (TREE_CHAIN (field));
4525 /* Subroutine of reshape_init, which processes a single initializer (part of
4526 a CONSTRUCTOR). TYPE is the type of the variable being initialized, D is the
4527 iterator within the CONSTRUCTOR which points to the initializer to process.
4528 FIRST_INITIALIZER_P is true if this is the first initializer of the
4529 CONSTRUCTOR node. */
4532 reshape_init_r (tree type, reshape_iter *d, bool first_initializer_p)
4534 tree init = d->cur->value;
4536 /* A non-aggregate type is always initialized with a single
4538 if (!CP_AGGREGATE_TYPE_P (type))
4540 /* It is invalid to initialize a non-aggregate type with a
4541 brace-enclosed initializer.
4542 We need to check for BRACE_ENCLOSED_INITIALIZER_P here because
4543 of g++.old-deja/g++.mike/p7626.C: a pointer-to-member constant is
4544 a CONSTRUCTOR (with a record type). */
4545 if (TREE_CODE (init) == CONSTRUCTOR
4546 && BRACE_ENCLOSED_INITIALIZER_P (init)) /* p7626.C */
4548 error ("braces around scalar initializer for type %qT", type);
4549 init = error_mark_node;
4558 All implicit type conversions (clause _conv_) are considered when
4559 initializing the aggregate member with an initializer from an
4560 initializer-list. If the initializer can initialize a member,
4561 the member is initialized. Otherwise, if the member is itself a
4562 non-empty subaggregate, brace elision is assumed and the
4563 initializer is considered for the initialization of the first
4564 member of the subaggregate. */
4565 if (TREE_CODE (init) != CONSTRUCTOR
4566 && can_convert_arg (type, TREE_TYPE (init), init, LOOKUP_NORMAL))
4572 /* [dcl.init.string]
4574 A char array (whether plain char, signed char, or unsigned char)
4575 can be initialized by a string-literal (optionally enclosed in
4576 braces); a wchar_t array can be initialized by a wide
4577 string-literal (optionally enclosed in braces). */
4578 if (TREE_CODE (type) == ARRAY_TYPE
4579 && char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (type))))
4581 tree str_init = init;
4583 /* Strip one level of braces if and only if they enclose a single
4584 element (as allowed by [dcl.init.string]). */
4585 if (!first_initializer_p
4586 && TREE_CODE (str_init) == CONSTRUCTOR
4587 && VEC_length (constructor_elt, CONSTRUCTOR_ELTS (str_init)) == 1)
4589 str_init = VEC_index (constructor_elt,
4590 CONSTRUCTOR_ELTS (str_init), 0)->value;
4593 /* If it's a string literal, then it's the initializer for the array
4594 as a whole. Otherwise, continue with normal initialization for
4595 array types (one value per array element). */
4596 if (TREE_CODE (str_init) == STRING_CST)
4603 /* The following cases are about aggregates. If we are not within a full
4604 initializer already, and there is not a CONSTRUCTOR, it means that there
4605 is a missing set of braces (that is, we are processing the case for
4606 which reshape_init exists). */
4607 if (!first_initializer_p)
4609 if (TREE_CODE (init) == CONSTRUCTOR)
4611 /* For a nested compound literal, there is no need to reshape since
4612 brace elision is not allowed. Even if we decided to allow it,
4613 we should add a call to reshape_init in finish_compound_literal,
4614 before calling digest_init, so changing this code would still
4615 not be necessary. */
4616 if (!COMPOUND_LITERAL_P (init))
4619 gcc_assert (BRACE_ENCLOSED_INITIALIZER_P (init));
4620 return reshape_init (type, init);
4623 gcc_assert (!BRACE_ENCLOSED_INITIALIZER_P (init));
4626 warning (OPT_Wmissing_braces, "missing braces around initializer for %qT",
4630 /* Dispatch to specialized routines. */
4631 if (CLASS_TYPE_P (type))
4632 return reshape_init_class (type, d, first_initializer_p);
4633 else if (TREE_CODE (type) == ARRAY_TYPE)
4634 return reshape_init_array (type, d);
4635 else if (TREE_CODE (type) == VECTOR_TYPE)
4636 return reshape_init_vector (type, d);
4641 /* Undo the brace-elision allowed by [dcl.init.aggr] in a
4642 brace-enclosed aggregate initializer.
4644 INIT is the CONSTRUCTOR containing the list of initializers describing
4645 a brace-enclosed initializer for an entity of the indicated aggregate TYPE.
4646 It may not presently match the shape of the TYPE; for example:
4648 struct S { int a; int b; };
4649 struct S a[] = { 1, 2, 3, 4 };
4651 Here INIT will hold a VEC of four elements, rather than a
4652 VEC of two elements, each itself a VEC of two elements. This
4653 routine transforms INIT from the former form into the latter. The
4654 revised CONSTRUCTOR node is returned. */
4657 reshape_init (tree type, tree init)
4659 VEC(constructor_elt, gc) *v;
4663 gcc_assert (BRACE_ENCLOSED_INITIALIZER_P (init));
4665 v = CONSTRUCTOR_ELTS (init);
4667 /* An empty constructor does not need reshaping, and it is always a valid
4669 if (VEC_empty (constructor_elt, v))
4672 /* Recurse on this CONSTRUCTOR. */
4673 d.cur = VEC_index (constructor_elt, v, 0);
4674 d.end = d.cur + VEC_length (constructor_elt, v);
4676 new_init = reshape_init_r (type, &d, true);
4677 if (new_init == error_mark_node)
4678 return error_mark_node;
4680 /* Make sure all the element of the constructor were used. Otherwise,
4681 issue an error about exceeding initializers. */
4683 error ("too many initializers for %qT", type);
4688 /* Verify INIT (the initializer for DECL), and record the
4689 initialization in DECL_INITIAL, if appropriate. CLEANUP is as for
4690 grok_reference_init.
4692 If the return value is non-NULL, it is an expression that must be
4693 evaluated dynamically to initialize DECL. */
4696 check_initializer (tree decl, tree init, int flags, tree *cleanup)
4698 tree type = TREE_TYPE (decl);
4699 tree init_code = NULL;
4701 /* Things that are going to be initialized need to have complete
4703 TREE_TYPE (decl) = type = complete_type (TREE_TYPE (decl));
4705 if (type == error_mark_node)
4706 /* We will have already complained. */
4708 else if (init && COMPLETE_TYPE_P (type)
4709 && !TREE_CONSTANT (TYPE_SIZE (type)))
4711 error ("variable-sized object %qD may not be initialized", decl);
4714 else if (TREE_CODE (type) == ARRAY_TYPE
4715 && !COMPLETE_TYPE_P (complete_type (TREE_TYPE (type))))
4717 error ("elements of array %q#D have incomplete type", decl);
4720 else if (TREE_CODE (type) != ARRAY_TYPE && !COMPLETE_TYPE_P (type))
4722 error ("%qD has incomplete type", decl);
4723 TREE_TYPE (decl) = error_mark_node;
4727 if (TREE_CODE (decl) == CONST_DECL)
4729 gcc_assert (TREE_CODE (type) != REFERENCE_TYPE);
4731 DECL_INITIAL (decl) = init;
4733 gcc_assert (init != NULL_TREE);
4736 else if (!DECL_EXTERNAL (decl) && TREE_CODE (type) == REFERENCE_TYPE)
4737 init = grok_reference_init (decl, type, init, cleanup);
4740 /* Do not reshape constructors of vectors (they don't need to be
4742 if (TREE_CODE (init) == CONSTRUCTOR
4743 && !COMPOUND_LITERAL_P (init)
4744 && !TREE_TYPE (init)) /* ptrmemfunc */
4746 init = reshape_init (type, init);
4748 if ((*targetm.vector_opaque_p) (type))
4750 error ("opaque vector types cannot be initialized");
4751 init = error_mark_node;
4755 /* If DECL has an array type without a specific bound, deduce the
4756 array size from the initializer. */
4757 maybe_deduce_size_from_array_init (decl, init);
4758 type = TREE_TYPE (decl);
4759 if (type == error_mark_node)
4762 if (TYPE_HAS_CONSTRUCTOR (type) || TYPE_NEEDS_CONSTRUCTING (type))
4764 if (TREE_CODE (type) == ARRAY_TYPE)
4765 goto initialize_aggr;
4766 else if (TREE_CODE (init) == CONSTRUCTOR)
4768 if (TYPE_NON_AGGREGATE_CLASS (type))
4770 error ("%qD must be initialized by constructor, "
4773 init = error_mark_node;
4776 goto dont_use_constructor;
4780 int saved_stmts_are_full_exprs_p;
4783 saved_stmts_are_full_exprs_p = 0;
4784 if (building_stmt_tree ())
4786 saved_stmts_are_full_exprs_p = stmts_are_full_exprs_p ();
4787 current_stmt_tree ()->stmts_are_full_exprs_p = 1;
4789 init = build_aggr_init (decl, init, flags);
4790 if (building_stmt_tree ())
4791 current_stmt_tree ()->stmts_are_full_exprs_p =
4792 saved_stmts_are_full_exprs_p;
4798 dont_use_constructor:
4799 if (TREE_CODE (init) != TREE_VEC)
4801 init_code = store_init_value (decl, init);
4802 if (pedantic && TREE_CODE (type) == ARRAY_TYPE
4803 && DECL_INITIAL (decl)
4804 && TREE_CODE (DECL_INITIAL (decl)) == STRING_CST
4805 && PAREN_STRING_LITERAL_P (DECL_INITIAL (decl)))
4806 warning (0, "array %qD initialized by parenthesized string literal %qE",
4807 decl, DECL_INITIAL (decl));
4812 else if (DECL_EXTERNAL (decl))
4814 else if (TYPE_P (type) && TYPE_NEEDS_CONSTRUCTING (type))
4815 goto initialize_aggr;
4816 else if (IS_AGGR_TYPE (type))
4818 tree core_type = strip_array_types (type);
4820 if (CLASSTYPE_READONLY_FIELDS_NEED_INIT (core_type))
4821 error ("structure %qD with uninitialized const members", decl);
4822 if (CLASSTYPE_REF_FIELDS_NEED_INIT (core_type))
4823 error ("structure %qD with uninitialized reference members", decl);
4825 check_for_uninitialized_const_var (decl);
4828 check_for_uninitialized_const_var (decl);
4830 if (init && init != error_mark_node)
4831 init_code = build2 (INIT_EXPR, type, decl, init);
4836 /* If DECL is not a local variable, give it RTL. */
4839 make_rtl_for_nonlocal_decl (tree decl, tree init, const char* asmspec)
4841 int toplev = toplevel_bindings_p ();
4843 const char *filename;
4845 /* Set the DECL_ASSEMBLER_NAME for the object. */
4848 /* The `register' keyword, when used together with an
4849 asm-specification, indicates that the variable should be
4850 placed in a particular register. */
4851 if (TREE_CODE (decl) == VAR_DECL && DECL_REGISTER (decl))
4853 set_user_assembler_name (decl, asmspec);
4854 DECL_HARD_REGISTER (decl) = 1;
4858 if (TREE_CODE (decl) == FUNCTION_DECL
4859 && DECL_BUILT_IN_CLASS (decl) == BUILT_IN_NORMAL)
4860 set_builtin_user_assembler_name (decl, asmspec);
4861 set_user_assembler_name (decl, asmspec);
4865 /* Handle non-variables up front. */
4866 if (TREE_CODE (decl) != VAR_DECL)
4868 rest_of_decl_compilation (decl, toplev, at_eof);
4872 /* If we see a class member here, it should be a static data
4874 if (DECL_LANG_SPECIFIC (decl) && DECL_IN_AGGR_P (decl))
4876 gcc_assert (TREE_STATIC (decl));
4877 /* An in-class declaration of a static data member should be
4878 external; it is only a declaration, and not a definition. */
4879 if (init == NULL_TREE)
4880 gcc_assert (DECL_EXTERNAL (decl));
4883 /* We don't create any RTL for local variables. */
4884 if (DECL_FUNCTION_SCOPE_P (decl) && !TREE_STATIC (decl))
4887 /* We defer emission of local statics until the corresponding
4888 DECL_EXPR is expanded. */
4889 defer_p = DECL_FUNCTION_SCOPE_P (decl) || DECL_VIRTUAL_P (decl);
4891 /* We try to defer namespace-scope static constants so that they are
4892 not emitted into the object file unnecessarily. */
4893 filename = input_filename;
4894 if (!DECL_VIRTUAL_P (decl)
4895 && TREE_READONLY (decl)
4896 && DECL_INITIAL (decl) != NULL_TREE
4897 && DECL_INITIAL (decl) != error_mark_node
4899 && ! EMPTY_CONSTRUCTOR_P (DECL_INITIAL (decl))
4901 && !TREE_PUBLIC (decl))
4903 /* Fool with the linkage of static consts according to #pragma
4905 struct c_fileinfo *finfo = get_fileinfo (lbasename (filename));
4906 if (!finfo->interface_unknown && !TREE_PUBLIC (decl))
4908 TREE_PUBLIC (decl) = 1;
4909 DECL_EXTERNAL (decl) = finfo->interface_only;
4914 /* Likewise for template instantiations. */
4915 else if (DECL_LANG_SPECIFIC (decl)
4916 && DECL_IMPLICIT_INSTANTIATION (decl))
4919 /* If we're not deferring, go ahead and assemble the variable. */
4921 rest_of_decl_compilation (decl, toplev, at_eof);
4924 /* Generate code to initialize DECL (a local variable). */
4927 initialize_local_var (tree decl, tree init)
4929 tree type = TREE_TYPE (decl);
4932 gcc_assert (TREE_CODE (decl) == VAR_DECL
4933 || TREE_CODE (decl) == RESULT_DECL);
4934 gcc_assert (!TREE_STATIC (decl));
4936 if (DECL_SIZE (decl) == NULL_TREE)
4938 /* If we used it already as memory, it must stay in memory. */
4939 DECL_INITIAL (decl) = NULL_TREE;
4940 TREE_ADDRESSABLE (decl) = TREE_USED (decl);
4943 if (DECL_SIZE (decl) && type != error_mark_node)
4947 /* Compute and store the initial value. */
4948 already_used = TREE_USED (decl) || TREE_USED (type);
4950 /* Perform the initialization. */
4953 int saved_stmts_are_full_exprs_p;
4955 gcc_assert (building_stmt_tree ());
4956 saved_stmts_are_full_exprs_p = stmts_are_full_exprs_p ();
4957 current_stmt_tree ()->stmts_are_full_exprs_p = 1;
4958 finish_expr_stmt (init);
4959 current_stmt_tree ()->stmts_are_full_exprs_p =
4960 saved_stmts_are_full_exprs_p;
4963 /* Set this to 0 so we can tell whether an aggregate which was
4964 initialized was ever used. Don't do this if it has a
4965 destructor, so we don't complain about the 'resource
4966 allocation is initialization' idiom. Now set
4967 attribute((unused)) on types so decls of that type will be
4968 marked used. (see TREE_USED, above.) */
4969 if (TYPE_NEEDS_CONSTRUCTING (type)
4971 && TYPE_HAS_TRIVIAL_DESTRUCTOR (type)
4972 && DECL_NAME (decl))
4973 TREE_USED (decl) = 0;
4974 else if (already_used)
4975 TREE_USED (decl) = 1;
4978 /* Generate a cleanup, if necessary. */
4979 cleanup = cxx_maybe_build_cleanup (decl);
4980 if (DECL_SIZE (decl) && cleanup)
4981 finish_decl_cleanup (decl, cleanup);
4984 /* DECL is a VAR_DECL for a compiler-generated variable with static
4985 storage duration (like a virtual table) whose initializer is a
4986 compile-time constant. INIT must be either a TREE_LIST of values,
4987 or a CONSTRUCTOR. Initialize the variable and provide it to the
4991 initialize_artificial_var (tree decl, tree init)
4993 if (TREE_CODE (init) == TREE_LIST)
4994 init = build_constructor_from_list (NULL_TREE, init);
4995 gcc_assert (TREE_CODE (init) == CONSTRUCTOR);
4996 DECL_INITIAL (decl) = init;
4997 DECL_INITIALIZED_P (decl) = 1;
4998 determine_visibility (decl);
4999 layout_var_decl (decl);
5000 maybe_commonize_var (decl);
5001 make_rtl_for_nonlocal_decl (decl, init, /*asmspec=*/NULL);
5004 /* Finish processing of a declaration;
5005 install its line number and initial value.
5006 If the length of an array type is not known before,
5007 it must be determined now, from the initial value, or it is an error.
5009 INIT is the initializer (if any) for DECL. If INIT_CONST_EXPR_P is
5010 true, then INIT is an integral constant expression.
5012 FLAGS is LOOKUP_ONLYCONVERTING if the = init syntax was used, else 0
5013 if the (init) syntax was used. */
5016 cp_finish_decl (tree decl, tree init, bool init_const_expr_p,
5017 tree asmspec_tree, int flags)
5021 const char *asmspec = NULL;
5022 int was_readonly = 0;
5023 bool var_definition_p = false;
5024 int saved_processing_template_decl;
5026 if (decl == error_mark_node)
5031 error ("assignment (not initialization) in declaration");
5035 gcc_assert (TREE_CODE (decl) != RESULT_DECL);
5036 /* Parameters are handled by store_parm_decls, not cp_finish_decl. */
5037 gcc_assert (TREE_CODE (decl) != PARM_DECL);
5039 type = TREE_TYPE (decl);
5040 if (type == error_mark_node)
5043 /* Assume no cleanup is required. */
5044 cleanup = NULL_TREE;
5045 saved_processing_template_decl = processing_template_decl;
5047 /* If a name was specified, get the string. */
5048 if (global_scope_p (current_binding_level))
5049 asmspec_tree = maybe_apply_renaming_pragma (decl, asmspec_tree);
5051 asmspec = TREE_STRING_POINTER (asmspec_tree);
5053 if (current_class_type
5054 && CP_DECL_CONTEXT (decl) == current_class_type
5055 && TYPE_BEING_DEFINED (current_class_type)
5056 && (DECL_INITIAL (decl) || init))
5057 DECL_INITIALIZED_IN_CLASS_P (decl) = 1;
5059 if (processing_template_decl)
5061 bool type_dependent_p;
5063 /* Add this declaration to the statement-tree. */
5064 if (at_function_scope_p ())
5065 add_decl_expr (decl);
5067 type_dependent_p = dependent_type_p (type);
5069 if (init && init_const_expr_p)
5071 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (decl) = 1;
5072 if (DECL_INTEGRAL_CONSTANT_VAR_P (decl))
5073 TREE_CONSTANT (decl) = 1;
5077 || !DECL_CLASS_SCOPE_P (decl)
5078 || !DECL_INTEGRAL_CONSTANT_VAR_P (decl)
5080 || value_dependent_expression_p (init))
5083 DECL_INITIAL (decl) = init;
5084 if (TREE_CODE (decl) == VAR_DECL
5085 && !DECL_PRETTY_FUNCTION_P (decl)
5086 && !type_dependent_p)
5087 maybe_deduce_size_from_array_init (decl, init);
5091 init = fold_non_dependent_expr (init);
5092 processing_template_decl = 0;
5095 /* Take care of TYPE_DECLs up front. */
5096 if (TREE_CODE (decl) == TYPE_DECL)
5098 if (type != error_mark_node
5099 && IS_AGGR_TYPE (type) && DECL_NAME (decl))
5101 if (TREE_TYPE (DECL_NAME (decl)) && TREE_TYPE (decl) != type)
5102 warning (0, "shadowing previous type declaration of %q#D", decl);
5103 set_identifier_type_value (DECL_NAME (decl), decl);
5106 /* If we have installed this as the canonical typedef for this
5107 type, and that type has not been defined yet, delay emitting
5108 the debug information for it, as we will emit it later. */
5109 if (TYPE_MAIN_DECL (TREE_TYPE (decl)) == decl
5110 && !COMPLETE_TYPE_P (TREE_TYPE (decl)))
5111 TYPE_DECL_SUPPRESS_DEBUG (decl) = 1;
5113 rest_of_decl_compilation (decl, DECL_CONTEXT (decl) == NULL_TREE,
5118 /* A reference will be modified here, as it is initialized. */
5119 if (! DECL_EXTERNAL (decl)
5120 && TREE_READONLY (decl)
5121 && TREE_CODE (type) == REFERENCE_TYPE)
5124 TREE_READONLY (decl) = 0;
5127 if (TREE_CODE (decl) == VAR_DECL)
5129 /* Only PODs can have thread-local storage. Other types may require
5130 various kinds of non-trivial initialization. */
5131 if (DECL_THREAD_LOCAL_P (decl) && !pod_type_p (TREE_TYPE (decl)))
5132 error ("%qD cannot be thread-local because it has non-POD type %qT",
5133 decl, TREE_TYPE (decl));
5134 /* Convert the initializer to the type of DECL, if we have not
5135 already initialized DECL. */
5136 if (!DECL_INITIALIZED_P (decl)
5137 /* If !DECL_EXTERNAL then DECL is being defined. In the
5138 case of a static data member initialized inside the
5139 class-specifier, there can be an initializer even if DECL
5140 is *not* defined. */
5141 && (!DECL_EXTERNAL (decl) || init))
5145 DECL_NONTRIVIALLY_INITIALIZED_P (decl) = 1;
5146 if (init_const_expr_p)
5148 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (decl) = 1;
5149 if (DECL_INTEGRAL_CONSTANT_VAR_P (decl))
5150 TREE_CONSTANT (decl) = 1;
5153 init = check_initializer (decl, init, flags, &cleanup);
5154 /* Thread-local storage cannot be dynamically initialized. */
5155 if (DECL_THREAD_LOCAL_P (decl) && init)
5157 error ("%qD is thread-local and so cannot be dynamically "
5158 "initialized", decl);
5162 /* Check that the initializer for a static data member was a
5163 constant. Although we check in the parser that the
5164 initializer is an integral constant expression, we do not
5165 simplify division-by-zero at the point at which it
5166 occurs. Therefore, in:
5168 struct S { static const int i = 7 / 0; };
5170 we issue an error at this point. It would
5171 probably be better to forbid division by zero in
5172 integral constant expressions. */
5173 if (DECL_EXTERNAL (decl) && init)
5175 error ("%qD cannot be initialized by a non-constant expression"
5176 " when being declared", decl);
5177 DECL_INITIALIZED_IN_CLASS_P (decl) = 0;
5185 The memory occupied by any object of static storage
5186 duration is zero-initialized at program startup before
5187 any other initialization takes place.
5189 We cannot create an appropriate initializer until after
5190 the type of DECL is finalized. If DECL_INITIAL is set,
5191 then the DECL is statically initialized, and any
5192 necessary zero-initialization has already been performed. */
5193 if (TREE_STATIC (decl) && !DECL_INITIAL (decl))
5194 DECL_INITIAL (decl) = build_zero_init (TREE_TYPE (decl),
5195 /*nelts=*/NULL_TREE,
5196 /*static_storage_p=*/true);
5197 /* Remember that the initialization for this variable has
5199 DECL_INITIALIZED_P (decl) = 1;
5200 /* This declaration is the definition of this variable,
5201 unless we are initializing a static data member within
5202 the class specifier. */
5203 if (!DECL_EXTERNAL (decl))
5204 var_definition_p = true;
5206 /* If the variable has an array type, lay out the type, even if
5207 there is no initializer. It is valid to index through the
5208 array, and we must get TYPE_ALIGN set correctly on the array
5210 else if (TREE_CODE (type) == ARRAY_TYPE)
5214 /* Add this declaration to the statement-tree. This needs to happen
5215 after the call to check_initializer so that the DECL_EXPR for a
5216 reference temp is added before the DECL_EXPR for the reference itself. */
5217 if (at_function_scope_p ())
5218 add_decl_expr (decl);
5220 /* Let the middle end know about variables and functions -- but not
5221 static data members in uninstantiated class templates. */
5222 if (!saved_processing_template_decl
5223 && (TREE_CODE (decl) == VAR_DECL
5224 || TREE_CODE (decl) == FUNCTION_DECL))
5226 if (TREE_CODE (decl) == VAR_DECL)
5228 layout_var_decl (decl);
5229 maybe_commonize_var (decl);
5232 make_rtl_for_nonlocal_decl (decl, init, asmspec);
5234 /* Check for abstractness of the type. Notice that there is no
5235 need to strip array types here since the check for those types
5236 is already done within create_array_type_for_decl. */
5237 if (TREE_CODE (type) == FUNCTION_TYPE
5238 || TREE_CODE (type) == METHOD_TYPE)
5239 abstract_virtuals_error (decl, TREE_TYPE (type));
5241 abstract_virtuals_error (decl, type);
5243 if (TREE_CODE (decl) == FUNCTION_DECL
5244 || TREE_TYPE (decl) == error_mark_node)
5245 /* No initialization required. */
5247 else if (DECL_EXTERNAL (decl)
5248 && ! (DECL_LANG_SPECIFIC (decl)
5249 && DECL_NOT_REALLY_EXTERN (decl)))
5252 DECL_INITIAL (decl) = init;
5256 /* A variable definition. */
5257 if (DECL_FUNCTION_SCOPE_P (decl))
5259 /* Initialize the local variable. */
5260 if (processing_template_decl)
5261 DECL_INITIAL (decl) = init;
5262 else if (!TREE_STATIC (decl))
5263 initialize_local_var (decl, init);
5266 /* The variable is being defined, so determine its visibility.
5267 This needs to happen after the linkage is set. */
5268 determine_visibility (decl);
5270 /* If a variable is defined, and then a subsequent
5271 definition with external linkage is encountered, we will
5272 get here twice for the same variable. We want to avoid
5273 calling expand_static_init more than once. For variables
5274 that are not static data members, we can call
5275 expand_static_init only when we actually process the
5276 initializer. It is not legal to redeclare a static data
5277 member, so this issue does not arise in that case. */
5278 if (var_definition_p && TREE_STATIC (decl))
5279 expand_static_init (decl, init);
5283 /* If a CLEANUP_STMT was created to destroy a temporary bound to a
5284 reference, insert it in the statement-tree now. */
5286 push_cleanup (decl, cleanup, false);
5289 processing_template_decl = saved_processing_template_decl;
5292 TREE_READONLY (decl) = 1;
5294 /* If this was marked 'used', be sure it will be output. */
5295 if (lookup_attribute ("used", DECL_ATTRIBUTES (decl)))
5296 mark_decl_referenced (decl);
5299 /* This is here for a midend callback from c-common.c. */
5302 finish_decl (tree decl, tree init, tree asmspec_tree)
5304 cp_finish_decl (decl, init, /*init_const_expr_p=*/false, asmspec_tree, 0);
5307 /* Returns a declaration for a VAR_DECL as if:
5309 extern "C" TYPE NAME;
5311 had been seen. Used to create compiler-generated global
5315 declare_global_var (tree name, tree type)
5319 push_to_top_level ();
5320 decl = build_decl (VAR_DECL, name, type);
5321 TREE_PUBLIC (decl) = 1;
5322 DECL_EXTERNAL (decl) = 1;
5323 DECL_ARTIFICIAL (decl) = 1;
5324 /* If the user has explicitly declared this variable (perhaps
5325 because the code we are compiling is part of a low-level runtime
5326 library), then it is possible that our declaration will be merged
5327 with theirs by pushdecl. */
5328 decl = pushdecl (decl);
5329 finish_decl (decl, NULL_TREE, NULL_TREE);
5330 pop_from_top_level ();
5335 /* Returns a pointer to the `atexit' function. Note that if
5336 FLAG_USE_CXA_ATEXIT is nonzero, then this will actually be the new
5337 `__cxa_atexit' function specified in the IA64 C++ ABI. */
5340 get_atexit_node (void)
5347 bool use_aeabi_atexit;
5352 if (flag_use_cxa_atexit)
5354 /* The declaration for `__cxa_atexit' is:
5356 int __cxa_atexit (void (*)(void *), void *, void *)
5358 We build up the argument types and then then function type
5361 use_aeabi_atexit = targetm.cxx.use_aeabi_atexit ();
5362 /* First, build the pointer-to-function type for the first
5364 arg_types = tree_cons (NULL_TREE, ptr_type_node, void_list_node);
5365 fn_type = build_function_type (void_type_node, arg_types);
5366 fn_ptr_type = build_pointer_type (fn_type);
5367 /* Then, build the rest of the argument types. */
5368 arg_types = tree_cons (NULL_TREE, ptr_type_node, void_list_node);
5369 if (use_aeabi_atexit)
5371 arg_types = tree_cons (NULL_TREE, fn_ptr_type, arg_types);
5372 arg_types = tree_cons (NULL_TREE, ptr_type_node, arg_types);
5376 arg_types = tree_cons (NULL_TREE, ptr_type_node, arg_types);
5377 arg_types = tree_cons (NULL_TREE, fn_ptr_type, arg_types);
5379 /* And the final __cxa_atexit type. */
5380 fn_type = build_function_type (integer_type_node, arg_types);
5381 fn_ptr_type = build_pointer_type (fn_type);
5382 if (use_aeabi_atexit)
5383 name = "__aeabi_atexit";
5385 name = "__cxa_atexit";
5389 /* The declaration for `atexit' is:
5391 int atexit (void (*)());
5393 We build up the argument types and then then function type
5395 fn_type = build_function_type (void_type_node, void_list_node);
5396 fn_ptr_type = build_pointer_type (fn_type);
5397 arg_types = tree_cons (NULL_TREE, fn_ptr_type, void_list_node);
5398 /* Build the final atexit type. */
5399 fn_type = build_function_type (integer_type_node, arg_types);
5403 /* Now, build the function declaration. */
5404 push_lang_context (lang_name_c);
5405 atexit_fndecl = build_library_fn_ptr (name, fn_type);
5406 mark_used (atexit_fndecl);
5407 pop_lang_context ();
5408 atexit_node = decay_conversion (atexit_fndecl);
5413 /* Returns the __dso_handle VAR_DECL. */
5416 get_dso_handle_node (void)
5418 if (dso_handle_node)
5419 return dso_handle_node;
5421 /* Declare the variable. */
5422 dso_handle_node = declare_global_var (get_identifier ("__dso_handle"),
5425 return dso_handle_node;
5428 /* Begin a new function with internal linkage whose job will be simply
5429 to destroy some particular variable. */
5431 static GTY(()) int start_cleanup_cnt;
5434 start_cleanup_fn (void)
5441 push_to_top_level ();
5443 /* No need to mangle this. */
5444 push_lang_context (lang_name_c);
5446 /* Build the parameter-types. */
5447 parmtypes = void_list_node;
5448 /* Functions passed to __cxa_atexit take an additional parameter.
5449 We'll just ignore it. After we implement the new calling
5450 convention for destructors, we can eliminate the use of
5451 additional cleanup functions entirely in the -fnew-abi case. */
5452 if (flag_use_cxa_atexit)
5453 parmtypes = tree_cons (NULL_TREE, ptr_type_node, parmtypes);
5454 /* Build the function type itself. */
5455 fntype = build_function_type (void_type_node, parmtypes);
5456 /* Build the name of the function. */
5457 sprintf (name, "__tcf_%d", start_cleanup_cnt++);
5458 /* Build the function declaration. */
5459 fndecl = build_lang_decl (FUNCTION_DECL, get_identifier (name), fntype);
5460 /* It's a function with internal linkage, generated by the
5462 TREE_PUBLIC (fndecl) = 0;
5463 DECL_ARTIFICIAL (fndecl) = 1;
5464 /* Make the function `inline' so that it is only emitted if it is
5465 actually needed. It is unlikely that it will be inlined, since
5466 it is only called via a function pointer, but we avoid unnecessary
5467 emissions this way. */
5468 DECL_INLINE (fndecl) = 1;
5469 DECL_DECLARED_INLINE_P (fndecl) = 1;
5470 DECL_INTERFACE_KNOWN (fndecl) = 1;
5471 /* Build the parameter. */
5472 if (flag_use_cxa_atexit)
5476 parmdecl = cp_build_parm_decl (NULL_TREE, ptr_type_node);
5477 DECL_CONTEXT (parmdecl) = fndecl;
5478 TREE_USED (parmdecl) = 1;
5479 DECL_ARGUMENTS (fndecl) = parmdecl;
5483 start_preparsed_function (fndecl, NULL_TREE, SF_PRE_PARSED);
5485 pop_lang_context ();
5487 return current_function_decl;
5490 /* Finish the cleanup function begun by start_cleanup_fn. */
5493 end_cleanup_fn (void)
5495 expand_or_defer_fn (finish_function (0));
5497 pop_from_top_level ();
5500 /* Generate code to handle the destruction of DECL, an object with
5501 static storage duration. */
5504 register_dtor_fn (tree decl)
5511 if (TYPE_HAS_TRIVIAL_DESTRUCTOR (TREE_TYPE (decl)))
5512 return void_zero_node;
5514 /* Call build_cleanup before we enter the anonymous function so that
5515 any access checks will be done relative to the current scope,
5516 rather than the scope of the anonymous function. */
5517 build_cleanup (decl);
5519 /* Now start the function. */
5520 cleanup = start_cleanup_fn ();
5522 /* Now, recompute the cleanup. It may contain SAVE_EXPRs that refer
5523 to the original function, rather than the anonymous one. That
5524 will make the back-end think that nested functions are in use,
5525 which causes confusion. */
5527 push_deferring_access_checks (dk_no_check);
5528 fcall = build_cleanup (decl);
5529 pop_deferring_access_checks ();
5531 /* Create the body of the anonymous function. */
5532 compound_stmt = begin_compound_stmt (BCS_FN_BODY);
5533 finish_expr_stmt (fcall);
5534 finish_compound_stmt (compound_stmt);
5537 /* Call atexit with the cleanup function. */
5538 cxx_mark_addressable (cleanup);
5539 mark_used (cleanup);
5540 cleanup = build_unary_op (ADDR_EXPR, cleanup, 0);
5541 if (flag_use_cxa_atexit)
5543 args = tree_cons (NULL_TREE,
5544 build_unary_op (ADDR_EXPR, get_dso_handle_node (), 0),
5546 if (targetm.cxx.use_aeabi_atexit ())
5548 args = tree_cons (NULL_TREE, cleanup, args);
5549 args = tree_cons (NULL_TREE, null_pointer_node, args);
5553 args = tree_cons (NULL_TREE, null_pointer_node, args);
5554 args = tree_cons (NULL_TREE, cleanup, args);
5558 args = tree_cons (NULL_TREE, cleanup, NULL_TREE);
5559 return build_function_call (get_atexit_node (), args);
5562 /* DECL is a VAR_DECL with static storage duration. INIT, if present,
5563 is its initializer. Generate code to handle the construction
5564 and destruction of DECL. */
5567 expand_static_init (tree decl, tree init)
5569 gcc_assert (TREE_CODE (decl) == VAR_DECL);
5570 gcc_assert (TREE_STATIC (decl));
5572 /* Some variables require no initialization. */
5574 && !TYPE_NEEDS_CONSTRUCTING (TREE_TYPE (decl))
5575 && TYPE_HAS_TRIVIAL_DESTRUCTOR (TREE_TYPE (decl)))
5578 if (DECL_FUNCTION_SCOPE_P (decl))
5580 /* Emit code to perform this initialization but once. */
5581 tree if_stmt = NULL_TREE, inner_if_stmt = NULL_TREE;
5582 tree then_clause = NULL_TREE, inner_then_clause = NULL_TREE;
5583 tree guard, guard_addr, guard_addr_list;
5584 tree acquire_fn, release_fn, abort_fn;
5587 /* Emit code to perform this initialization but once. This code
5590 static <type> guard;
5591 if (!guard.first_byte) {
5592 if (__cxa_guard_acquire (&guard)) {
5595 // Do initialization.
5596 flag = true; __cxa_guard_release (&guard);
5597 // Register variable for destruction at end of program.
5599 if (!flag) __cxa_guard_abort (&guard);
5603 Note that the `flag' variable is only set to 1 *after* the
5604 initialization is complete. This ensures that an exception,
5605 thrown during the construction, will cause the variable to
5606 reinitialized when we pass through this code again, as per:
5610 If the initialization exits by throwing an exception, the
5611 initialization is not complete, so it will be tried again
5612 the next time control enters the declaration.
5614 This process should be thread-safe, too; multiple threads
5615 should not be able to initialize the variable more than
5618 /* Create the guard variable. */
5619 guard = get_guard (decl);
5621 /* This optimization isn't safe on targets with relaxed memory
5622 consistency. On such targets we force synchronization in
5623 __cxa_guard_acquire. */
5624 if (!targetm.relaxed_ordering || !flag_threadsafe_statics)
5626 /* Begin the conditional initialization. */
5627 if_stmt = begin_if_stmt ();
5628 finish_if_stmt_cond (get_guard_cond (guard), if_stmt);
5629 then_clause = begin_compound_stmt (BCS_NO_SCOPE);
5632 if (flag_threadsafe_statics)
5634 guard_addr = build_address (guard);
5635 guard_addr_list = build_tree_list (NULL_TREE, guard_addr);
5637 acquire_fn = get_identifier ("__cxa_guard_acquire");
5638 release_fn = get_identifier ("__cxa_guard_release");
5639 abort_fn = get_identifier ("__cxa_guard_abort");
5640 if (!get_global_value_if_present (acquire_fn, &acquire_fn))
5642 tree argtypes = tree_cons (NULL_TREE, TREE_TYPE (guard_addr),
5644 tree vfntype = build_function_type (void_type_node, argtypes);
5645 acquire_fn = push_library_fn
5646 (acquire_fn, build_function_type (integer_type_node, argtypes));
5647 release_fn = push_library_fn (release_fn, vfntype);
5648 abort_fn = push_library_fn (abort_fn, vfntype);
5652 release_fn = identifier_global_value (release_fn);
5653 abort_fn = identifier_global_value (abort_fn);
5656 inner_if_stmt = begin_if_stmt ();
5657 finish_if_stmt_cond (build_call (acquire_fn, guard_addr_list),
5660 inner_then_clause = begin_compound_stmt (BCS_NO_SCOPE);
5661 begin = get_target_expr (boolean_false_node);
5662 flag = TARGET_EXPR_SLOT (begin);
5664 TARGET_EXPR_CLEANUP (begin)
5665 = build3 (COND_EXPR, void_type_node, flag,
5667 build_call (abort_fn, guard_addr_list));
5668 CLEANUP_EH_ONLY (begin) = 1;
5670 /* Do the initialization itself. */
5671 init = add_stmt_to_compound (begin, init);
5672 init = add_stmt_to_compound
5673 (init, build2 (MODIFY_EXPR, void_type_node, flag, boolean_true_node));
5674 init = add_stmt_to_compound
5675 (init, build_call (release_fn, guard_addr_list));
5678 init = add_stmt_to_compound (init, set_guard (guard));
5680 /* Use atexit to register a function for destroying this static
5682 init = add_stmt_to_compound (init, register_dtor_fn (decl));
5684 finish_expr_stmt (init);
5686 if (flag_threadsafe_statics)
5688 finish_compound_stmt (inner_then_clause);
5689 finish_then_clause (inner_if_stmt);
5690 finish_if_stmt (inner_if_stmt);
5693 if (!targetm.relaxed_ordering || !flag_threadsafe_statics)
5695 finish_compound_stmt (then_clause);
5696 finish_then_clause (if_stmt);
5697 finish_if_stmt (if_stmt);
5701 static_aggregates = tree_cons (init, decl, static_aggregates);
5705 /* Make TYPE a complete type based on INITIAL_VALUE.
5706 Return 0 if successful, 1 if INITIAL_VALUE can't be deciphered,
5707 2 if there was no information (in which case assume 0 if DO_DEFAULT),
5708 3 if the initializer list is empty (in pedantic mode). */
5711 cp_complete_array_type (tree *ptype, tree initial_value, bool do_default)
5714 tree type, elt_type;
5718 /* An array of character type can be initialized from a
5719 brace-enclosed string constant.
5721 FIXME: this code is duplicated from reshape_init. Probably
5722 we should just call reshape_init here? */
5723 if (char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (*ptype)))
5724 && TREE_CODE (initial_value) == CONSTRUCTOR
5725 && !VEC_empty (constructor_elt, CONSTRUCTOR_ELTS (initial_value)))
5727 VEC(constructor_elt,gc) *v = CONSTRUCTOR_ELTS (initial_value);
5728 tree value = VEC_index (constructor_elt, v, 0)->value;
5730 if (TREE_CODE (value) == STRING_CST
5731 && VEC_length (constructor_elt, v) == 1)
5732 initial_value = value;
5736 failure = complete_array_type (ptype, initial_value, do_default);
5738 /* We can create the array before the element type is complete, which
5739 means that we didn't have these two bits set in the original type
5740 either. In completing the type, we are expected to propagate these
5741 bits. See also complete_type which does the same thing for arrays
5744 if (TYPE_DOMAIN (type))
5746 elt_type = TREE_TYPE (type);
5747 TYPE_NEEDS_CONSTRUCTING (type) = TYPE_NEEDS_CONSTRUCTING (elt_type);
5748 TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type)
5749 = TYPE_HAS_NONTRIVIAL_DESTRUCTOR (elt_type);
5755 /* Return zero if something is declared to be a member of type
5756 CTYPE when in the context of CUR_TYPE. STRING is the error
5757 message to print in that case. Otherwise, quietly return 1. */
5760 member_function_or_else (tree ctype, tree cur_type, enum overload_flags flags)
5762 if (ctype && ctype != cur_type)
5764 if (flags == DTOR_FLAG)
5765 error ("destructor for alien class %qT cannot be a member", ctype);
5767 error ("constructor for alien class %qT cannot be a member", ctype);
5773 /* Subroutine of `grokdeclarator'. */
5775 /* Generate errors possibly applicable for a given set of specifiers.
5776 This is for ARM $7.1.2. */
5779 bad_specifiers (tree object,
5788 error ("%qD declared as a %<virtual%> %s", object, type);
5790 error ("%qD declared as an %<inline%> %s", object, type);
5792 error ("%<const%> and %<volatile%> function specifiers on "
5793 "%qD invalid in %s declaration",
5796 error ("%q+D declared as a friend", object);
5798 && (TREE_CODE (object) == TYPE_DECL
5799 || (!TYPE_PTRFN_P (TREE_TYPE (object))
5800 && !TYPE_REFFN_P (TREE_TYPE (object))
5801 && !TYPE_PTRMEMFUNC_P (TREE_TYPE (object)))))
5802 error ("%q+D declared with an exception specification", object);
5805 /* DECL is a member function or static data member and is presently
5806 being defined. Check that the definition is taking place in a
5810 check_class_member_definition_namespace (tree decl)
5812 /* These checks only apply to member functions and static data
5814 gcc_assert (TREE_CODE (decl) == FUNCTION_DECL
5815 || TREE_CODE (decl) == VAR_DECL);
5816 /* We check for problems with specializations in pt.c in
5817 check_specialization_namespace, where we can issue better
5819 if (processing_specialization)
5821 /* There are no restrictions on the placement of
5822 explicit instantiations. */
5823 if (processing_explicit_instantiation)
5827 A member function definition that appears outside of the
5828 class definition shall appear in a namespace scope enclosing
5829 the class definition.
5833 The definition for a static data member shall appear in a
5834 namespace scope enclosing the member's class definition. */
5835 if (!is_ancestor (current_namespace, DECL_CONTEXT (decl)))
5836 pedwarn ("definition of %qD is not in namespace enclosing %qT",
5837 decl, DECL_CONTEXT (decl));
5840 /* Build a PARM_DECL for the "this" parameter. TYPE is the
5841 METHOD_TYPE for a non-static member function; QUALS are the
5842 cv-qualifiers that apply to the function. */
5845 build_this_parm (tree type, cp_cv_quals quals)
5850 cp_cv_quals this_quals;
5852 this_type = TREE_VALUE (TYPE_ARG_TYPES (type));
5853 /* The `this' parameter is implicitly `const'; it cannot be
5855 this_quals = (quals & TYPE_QUAL_RESTRICT) | TYPE_QUAL_CONST;
5856 qual_type = cp_build_qualified_type (this_type, this_quals);
5857 parm = build_artificial_parm (this_identifier, qual_type);
5858 cp_apply_type_quals_to_decl (this_quals, parm);
5862 /* CTYPE is class type, or null if non-class.
5863 TYPE is type this FUNCTION_DECL should have, either FUNCTION_TYPE
5865 DECLARATOR is the function's name.
5866 PARMS is a chain of PARM_DECLs for the function.
5867 VIRTUALP is truthvalue of whether the function is virtual or not.
5868 FLAGS are to be passed through to `grokclassfn'.
5869 QUALS are qualifiers indicating whether the function is `const'
5871 RAISES is a list of exceptions that this function can raise.
5872 CHECK is 1 if we must find this method in CTYPE, 0 if we should
5873 not look, and -1 if we should not call `grokclassfn' at all.
5875 SFK is the kind of special function (if any) for the new function.
5877 Returns `NULL_TREE' if something goes wrong, after issuing
5878 applicable error messages. */
5881 grokfndecl (tree ctype,
5885 tree orig_declarator,
5887 enum overload_flags flags,
5894 special_function_kind sfk,
5901 int staticp = ctype && TREE_CODE (type) == FUNCTION_TYPE;
5905 type = build_exception_variant (type, raises);
5907 decl = build_lang_decl (FUNCTION_DECL, declarator, type);
5908 if (TREE_CODE (type) == METHOD_TYPE)
5911 parm = build_this_parm (type, quals);
5912 TREE_CHAIN (parm) = parms;
5915 DECL_ARGUMENTS (decl) = parms;
5916 /* Propagate volatile out from type to decl. */
5917 if (TYPE_VOLATILE (type))
5918 TREE_THIS_VOLATILE (decl) = 1;
5921 && TREE_CODE (orig_declarator) == TEMPLATE_ID_EXPR)
5925 ("defining explicit specialization %qD in friend declaration",
5929 tree fns = TREE_OPERAND (orig_declarator, 0);
5930 tree args = TREE_OPERAND (orig_declarator, 1);
5932 if (PROCESSING_REAL_TEMPLATE_DECL_P ())
5934 /* Something like `template <class T> friend void f<T>()'. */
5935 error ("invalid use of template-id %qD in declaration "
5936 "of primary template",
5942 /* A friend declaration of the form friend void f<>(). Record
5943 the information in the TEMPLATE_ID_EXPR. */
5944 SET_DECL_IMPLICIT_INSTANTIATION (decl);
5946 if (TREE_CODE (fns) == COMPONENT_REF)
5948 /* Due to bison parser ickiness, we will have already looked
5949 up an operator_name or PFUNCNAME within the current class
5950 (see template_id in parse.y). If the current class contains
5951 such a name, we'll get a COMPONENT_REF here. Undo that. */
5953 gcc_assert (TREE_TYPE (TREE_OPERAND (fns, 0))
5954 == current_class_type);
5955 fns = TREE_OPERAND (fns, 1);
5957 gcc_assert (TREE_CODE (fns) == IDENTIFIER_NODE
5958 || TREE_CODE (fns) == OVERLOAD);
5959 DECL_TEMPLATE_INFO (decl) = tree_cons (fns, args, NULL_TREE);
5961 for (t = TYPE_ARG_TYPES (TREE_TYPE (decl)); t; t = TREE_CHAIN (t))
5962 if (TREE_PURPOSE (t)
5963 && TREE_CODE (TREE_PURPOSE (t)) == DEFAULT_ARG)
5965 error ("default arguments are not allowed in declaration "
5966 "of friend template specialization %qD",
5973 error ("%<inline%> is not allowed in declaration of friend "
5974 "template specialization %qD",
5981 /* If this decl has namespace scope, set that up. */
5983 set_decl_namespace (decl, in_namespace, friendp);
5985 DECL_CONTEXT (decl) = FROB_CONTEXT (current_namespace);
5987 /* `main' and builtins have implicit 'C' linkage. */
5988 if ((MAIN_NAME_P (declarator)
5989 || (IDENTIFIER_LENGTH (declarator) > 10
5990 && IDENTIFIER_POINTER (declarator)[0] == '_'
5991 && IDENTIFIER_POINTER (declarator)[1] == '_'
5992 && strncmp (IDENTIFIER_POINTER (declarator)+2, "builtin_", 8) == 0))
5993 && current_lang_name == lang_name_cplusplus
5994 && ctype == NULL_TREE
5995 /* NULL_TREE means global namespace. */
5996 && DECL_CONTEXT (decl) == NULL_TREE)
5997 SET_DECL_LANGUAGE (decl, lang_c);
5999 /* Should probably propagate const out from type to decl I bet (mrs). */
6002 DECL_STATIC_FUNCTION_P (decl) = 1;
6003 DECL_CONTEXT (decl) = ctype;
6008 DECL_CONTEXT (decl) = ctype;
6010 check_class_member_definition_namespace (decl);
6013 if (ctype == NULL_TREE && DECL_MAIN_P (decl))
6015 if (processing_template_decl)
6016 error ("cannot declare %<::main%> to be a template");
6018 error ("cannot declare %<::main%> to be inline");
6020 error ("cannot declare %<::main%> to be static");
6021 if (!same_type_p (TREE_TYPE (TREE_TYPE (decl)),
6024 tree oldtypeargs = TYPE_ARG_TYPES (TREE_TYPE (decl));
6026 error ("%<::main%> must return %<int%>");
6027 newtype = build_function_type (integer_type_node,
6029 TREE_TYPE (decl) = newtype;
6035 /* Members of anonymous types and local classes have no linkage; make
6036 them internal. If a typedef is made later, this will be changed. */
6037 if (ctype && (TYPE_ANONYMOUS_P (ctype)
6038 || decl_function_context (TYPE_MAIN_DECL (ctype))))
6043 /* [basic.link]: A name with no linkage (notably, the name of a class
6044 or enumeration declared in a local scope) shall not be used to
6045 declare an entity with linkage.
6047 Only check this for public decls for now. See core 319, 389. */
6048 t = no_linkage_check (TREE_TYPE (decl),
6049 /*relaxed_p=*/false);
6052 if (TYPE_ANONYMOUS_P (t))
6054 if (DECL_EXTERN_C_P (decl))
6055 /* Allow this; it's pretty common in C. */;
6058 pedwarn ("non-local function %q#D uses anonymous type",
6060 if (DECL_ORIGINAL_TYPE (TYPE_NAME (t)))
6061 pedwarn ("%q+#D does not refer to the unqualified "
6062 "type, so it is not used for linkage",
6067 pedwarn ("non-local function %q#D uses local type %qT", decl, t);
6071 TREE_PUBLIC (decl) = publicp;
6074 DECL_INTERFACE_KNOWN (decl) = 1;
6075 DECL_NOT_REALLY_EXTERN (decl) = 1;
6078 /* If the declaration was declared inline, mark it as such. */
6080 DECL_DECLARED_INLINE_P (decl) = 1;
6081 /* We inline functions that are explicitly declared inline, or, when
6082 the user explicitly asks us to, all functions. */
6083 if (DECL_DECLARED_INLINE_P (decl)
6084 || (flag_inline_trees == 2 && !DECL_INLINE (decl) && funcdef_flag))
6085 DECL_INLINE (decl) = 1;
6087 DECL_EXTERNAL (decl) = 1;
6088 if (quals && TREE_CODE (type) == FUNCTION_TYPE)
6090 error ("%smember function %qD cannot have cv-qualifier",
6091 (ctype ? "static " : "non-"), decl);
6092 quals = TYPE_UNQUALIFIED;
6095 if (IDENTIFIER_OPNAME_P (DECL_NAME (decl)))
6096 grok_op_properties (decl, /*complain=*/true);
6098 if (ctype && decl_function_context (decl))
6099 DECL_NO_STATIC_CHAIN (decl) = 1;
6102 /* Make the init_value nonzero so pushdecl knows this is not
6103 tentative. error_mark_node is replaced later with the BLOCK. */
6104 DECL_INITIAL (decl) = error_mark_node;
6106 if (TYPE_NOTHROW_P (type) || nothrow_libfn_p (decl))
6107 TREE_NOTHROW (decl) = 1;
6109 /* Caller will do the rest of this. */
6113 if (ctype != NULL_TREE)
6115 if (sfk == sfk_constructor)
6116 DECL_CONSTRUCTOR_P (decl) = 1;
6118 grokclassfn (ctype, decl, flags);
6121 decl = check_explicit_specialization (orig_declarator, decl,
6124 4 * (friendp != 0));
6125 if (decl == error_mark_node)
6130 cplus_decl_attributes (&decl, *attrlist, 0);
6131 *attrlist = NULL_TREE;
6134 if (ctype != NULL_TREE
6135 && (! TYPE_FOR_JAVA (ctype) || check_java_method (decl))
6140 old_decl = check_classfn (ctype, decl,
6141 (processing_template_decl
6142 > template_class_depth (ctype))
6143 ? current_template_parms
6150 if (TREE_CODE (old_decl) == TEMPLATE_DECL)
6151 /* Because grokfndecl is always supposed to return a
6152 FUNCTION_DECL, we pull out the DECL_TEMPLATE_RESULT
6153 here. We depend on our callers to figure out that its
6154 really a template that's being returned. */
6155 old_decl = DECL_TEMPLATE_RESULT (old_decl);
6157 if (DECL_STATIC_FUNCTION_P (old_decl)
6158 && TREE_CODE (TREE_TYPE (decl)) == METHOD_TYPE)
6159 /* Remove the `this' parm added by grokclassfn.
6160 XXX Isn't this done in start_function, too? */
6161 revert_static_member_fn (decl);
6162 if (DECL_ARTIFICIAL (old_decl))
6163 error ("definition of implicitly-declared %qD", old_decl);
6165 /* Since we've smashed OLD_DECL to its
6166 DECL_TEMPLATE_RESULT, we must do the same to DECL. */
6167 if (TREE_CODE (decl) == TEMPLATE_DECL)
6168 decl = DECL_TEMPLATE_RESULT (decl);
6170 /* Attempt to merge the declarations. This can fail, in
6171 the case of some invalid specialization declarations. */
6172 pushed_scope = push_scope (ctype);
6173 ok = duplicate_decls (decl, old_decl, friendp);
6175 pop_scope (pushed_scope);
6178 error ("no %q#D member function declared in class %qT",
6186 if (DECL_CONSTRUCTOR_P (decl) && !grok_ctor_properties (ctype, decl))
6189 if (ctype == NULL_TREE || check)
6193 DECL_VIRTUAL_P (decl) = 1;
6198 /* DECL is a VAR_DECL for a static data member. Set flags to reflect
6199 the linkage that DECL will receive in the object file. */
6202 set_linkage_for_static_data_member (tree decl)
6204 /* A static data member always has static storage duration and
6205 external linkage. Note that static data members are forbidden in
6206 local classes -- the only situation in which a class has
6207 non-external linkage. */
6208 TREE_PUBLIC (decl) = 1;
6209 TREE_STATIC (decl) = 1;
6210 /* For non-template classes, static data members are always put
6211 out in exactly those files where they are defined, just as
6212 with ordinary namespace-scope variables. */
6213 if (!processing_template_decl)
6214 DECL_INTERFACE_KNOWN (decl) = 1;
6217 /* Create a VAR_DECL named NAME with the indicated TYPE.
6219 If SCOPE is non-NULL, it is the class type or namespace containing
6220 the variable. If SCOPE is NULL, the variable should is created in
6221 the innermost enclosings scope. */
6224 grokvardecl (tree type,
6226 const cp_decl_specifier_seq *declspecs,
6232 tree explicit_scope;
6234 gcc_assert (!name || TREE_CODE (name) == IDENTIFIER_NODE);
6236 /* Compute the scope in which to place the variable, but remember
6237 whether or not that scope was explicitly specified by the user. */
6238 explicit_scope = scope;
6241 /* An explicit "extern" specifier indicates a namespace-scope
6243 if (declspecs->storage_class == sc_extern)
6244 scope = current_namespace;
6245 else if (!at_function_scope_p ())
6246 scope = current_scope ();
6250 && (/* If the variable is a namespace-scope variable declared in a
6251 template, we need DECL_LANG_SPECIFIC. */
6252 (TREE_CODE (scope) == NAMESPACE_DECL && processing_template_decl)
6253 /* Similarly for namespace-scope variables with language linkage
6255 || (TREE_CODE (scope) == NAMESPACE_DECL
6256 && current_lang_name != lang_name_cplusplus)
6257 /* Similarly for static data members. */
6259 decl = build_lang_decl (VAR_DECL, name, type);
6261 decl = build_decl (VAR_DECL, name, type);
6263 if (explicit_scope && TREE_CODE (explicit_scope) == NAMESPACE_DECL)
6264 set_decl_namespace (decl, explicit_scope, 0);
6266 DECL_CONTEXT (decl) = scope;
6268 if (declspecs->storage_class == sc_extern)
6270 DECL_THIS_EXTERN (decl) = 1;
6271 DECL_EXTERNAL (decl) = !initialized;
6274 if (DECL_CLASS_SCOPE_P (decl))
6276 set_linkage_for_static_data_member (decl);
6277 /* This function is only called with out-of-class definitions. */
6278 DECL_EXTERNAL (decl) = 0;
6279 check_class_member_definition_namespace (decl);
6281 /* At top level, either `static' or no s.c. makes a definition
6282 (perhaps tentative), and absence of `static' makes it public. */
6283 else if (toplevel_bindings_p ())
6285 TREE_PUBLIC (decl) = (declspecs->storage_class != sc_static
6286 && (DECL_THIS_EXTERN (decl) || ! constp));
6287 TREE_STATIC (decl) = ! DECL_EXTERNAL (decl);
6289 /* Not at top level, only `static' makes a static definition. */
6292 TREE_STATIC (decl) = declspecs->storage_class == sc_static;
6293 TREE_PUBLIC (decl) = DECL_EXTERNAL (decl);
6296 if (declspecs->specs[(int)ds_thread])
6298 if (targetm.have_tls)
6299 DECL_TLS_MODEL (decl) = decl_default_tls_model (decl);
6301 /* A mere warning is sure to result in improper semantics
6302 at runtime. Don't bother to allow this to compile. */
6303 error ("thread-local storage not supported for this target");
6306 if (TREE_PUBLIC (decl))
6308 /* [basic.link]: A name with no linkage (notably, the name of a class
6309 or enumeration declared in a local scope) shall not be used to
6310 declare an entity with linkage.
6312 Only check this for public decls for now. */
6313 tree t = no_linkage_check (TREE_TYPE (decl), /*relaxed_p=*/false);
6316 if (TYPE_ANONYMOUS_P (t))
6318 if (DECL_EXTERN_C_P (decl))
6319 /* Allow this; it's pretty common in C. */
6323 /* DRs 132, 319 and 389 seem to indicate types with
6324 no linkage can only be used to declare extern "C"
6325 entities. Since it's not always an error in the
6326 ISO C++ 90 Standard, we only issue a warning. */
6327 warning (0, "non-local variable %q#D uses anonymous type",
6329 if (DECL_ORIGINAL_TYPE (TYPE_NAME (t)))
6330 warning (0, "%q+#D does not refer to the unqualified "
6331 "type, so it is not used for linkage",
6336 warning (0, "non-local variable %q#D uses local type %qT", decl, t);
6340 DECL_INTERFACE_KNOWN (decl) = 1;
6345 /* Create and return a canonical pointer to member function type, for
6346 TYPE, which is a POINTER_TYPE to a METHOD_TYPE. */
6349 build_ptrmemfunc_type (tree type)
6353 tree unqualified_variant = NULL_TREE;
6355 if (type == error_mark_node)
6358 /* If a canonical type already exists for this type, use it. We use
6359 this method instead of type_hash_canon, because it only does a
6360 simple equality check on the list of field members. */
6362 if ((t = TYPE_GET_PTRMEMFUNC_TYPE (type)))
6365 /* Make sure that we always have the unqualified pointer-to-member
6367 if (cp_type_quals (type) != TYPE_UNQUALIFIED)
6369 = build_ptrmemfunc_type (TYPE_MAIN_VARIANT (type));
6371 t = make_aggr_type (RECORD_TYPE);
6372 xref_basetypes (t, NULL_TREE);
6374 /* Let the front-end know this is a pointer to member function... */
6375 TYPE_PTRMEMFUNC_FLAG (t) = 1;
6376 /* ... and not really an aggregate. */
6377 SET_IS_AGGR_TYPE (t, 0);
6379 field = build_decl (FIELD_DECL, pfn_identifier, type);
6382 field = build_decl (FIELD_DECL, delta_identifier, delta_type_node);
6383 TREE_CHAIN (field) = fields;
6386 finish_builtin_struct (t, "__ptrmemfunc_type", fields, ptr_type_node);
6388 /* Zap out the name so that the back-end will give us the debugging
6389 information for this anonymous RECORD_TYPE. */
6390 TYPE_NAME (t) = NULL_TREE;
6392 /* If this is not the unqualified form of this pointer-to-member
6393 type, set the TYPE_MAIN_VARIANT for this type to be the
6394 unqualified type. Since they are actually RECORD_TYPEs that are
6395 not variants of each other, we must do this manually. */
6396 if (cp_type_quals (type) != TYPE_UNQUALIFIED)
6398 t = build_qualified_type (t, cp_type_quals (type));
6399 TYPE_MAIN_VARIANT (t) = unqualified_variant;
6400 TYPE_NEXT_VARIANT (t) = TYPE_NEXT_VARIANT (unqualified_variant);
6401 TYPE_NEXT_VARIANT (unqualified_variant) = t;
6404 /* Cache this pointer-to-member type so that we can find it again
6406 TYPE_SET_PTRMEMFUNC_TYPE (type, t);
6411 /* Create and return a pointer to data member type. */
6414 build_ptrmem_type (tree class_type, tree member_type)
6416 if (TREE_CODE (member_type) == METHOD_TYPE)
6420 arg_types = TYPE_ARG_TYPES (member_type);
6421 class_type = (cp_build_qualified_type
6423 cp_type_quals (TREE_TYPE (TREE_VALUE (arg_types)))));
6425 = build_method_type_directly (class_type,
6426 TREE_TYPE (member_type),
6427 TREE_CHAIN (arg_types));
6428 return build_ptrmemfunc_type (build_pointer_type (member_type));
6432 gcc_assert (TREE_CODE (member_type) != FUNCTION_TYPE);
6433 return build_offset_type (class_type, member_type);
6437 /* DECL is a VAR_DECL defined in-class, whose TYPE is also given.
6438 Check to see that the definition is valid. Issue appropriate error
6439 messages. Return 1 if the definition is particularly bad, or 0
6443 check_static_variable_definition (tree decl, tree type)
6445 /* Motion 10 at San Diego: If a static const integral data member is
6446 initialized with an integral constant expression, the initializer
6447 may appear either in the declaration (within the class), or in
6448 the definition, but not both. If it appears in the class, the
6449 member is a member constant. The file-scope definition is always
6451 if (!ARITHMETIC_TYPE_P (type) && TREE_CODE (type) != ENUMERAL_TYPE)
6453 error ("invalid in-class initialization of static data member "
6454 "of non-integral type %qT",
6456 /* If we just return the declaration, crashes will sometimes
6457 occur. We therefore return void_type_node, as if this were a
6458 friend declaration, to cause callers to completely ignore
6459 this declaration. */
6462 else if (!CP_TYPE_CONST_P (type))
6463 error ("ISO C++ forbids in-class initialization of non-const "
6464 "static member %qD",
6466 else if (pedantic && !INTEGRAL_TYPE_P (type))
6467 pedwarn ("ISO C++ forbids initialization of member constant "
6468 "%qD of non-integral type %qT", decl, type);
6473 /* Given the SIZE (i.e., number of elements) in an array, compute an
6474 appropriate index type for the array. If non-NULL, NAME is the
6475 name of the thing being declared. */
6478 compute_array_index_type (tree name, tree size)
6483 if (error_operand_p (size))
6484 return error_mark_node;
6486 type = TREE_TYPE (size);
6487 /* The array bound must be an integer type. */
6488 if (!dependent_type_p (type) && !INTEGRAL_TYPE_P (type))
6491 error ("size of array %qD has non-integral type %qT", name, type);
6493 error ("size of array has non-integral type %qT", type);
6494 size = integer_one_node;
6495 type = TREE_TYPE (size);
6498 if (abi_version_at_least (2)
6499 /* We should only handle value dependent expressions specially. */
6500 ? value_dependent_expression_p (size)
6501 /* But for abi-1, we handled all instances in templates. This
6502 effects the manglings produced. */
6503 : processing_template_decl)
6504 return build_index_type (build_min (MINUS_EXPR, sizetype,
6505 size, integer_one_node));
6507 /* The size might be the result of a cast. */
6508 STRIP_TYPE_NOPS (size);
6510 /* It might be a const variable or enumeration constant. */
6511 size = integral_constant_value (size);
6513 /* Normally, the array-bound will be a constant. */
6514 if (TREE_CODE (size) == INTEGER_CST)
6516 /* Check to see if the array bound overflowed. Make that an
6517 error, no matter how generous we're being. */
6518 int old_flag_pedantic_errors = flag_pedantic_errors;
6519 int old_pedantic = pedantic;
6520 pedantic = flag_pedantic_errors = 1;
6521 constant_expression_warning (size);
6522 pedantic = old_pedantic;
6523 flag_pedantic_errors = old_flag_pedantic_errors;
6525 /* An array must have a positive number of elements. */
6526 if (INT_CST_LT (size, integer_zero_node))
6529 error ("size of array %qD is negative", name);
6531 error ("size of array is negative");
6532 size = integer_one_node;
6534 /* As an extension we allow zero-sized arrays. We always allow
6535 them in system headers because glibc uses them. */
6536 else if (integer_zerop (size) && pedantic && !in_system_header)
6539 pedwarn ("ISO C++ forbids zero-size array %qD", name);
6541 pedwarn ("ISO C++ forbids zero-size array");
6544 else if (TREE_CONSTANT (size))
6546 /* `(int) &fn' is not a valid array bound. */
6548 error ("size of array %qD is not an integral constant-expression",
6551 error ("size of array is not an integral constant-expression");
6552 size = integer_one_node;
6557 pedwarn ("ISO C++ forbids variable-size array %qD", name);
6559 pedwarn ("ISO C++ forbids variable-size array");
6562 if (processing_template_decl && !TREE_CONSTANT (size))
6563 /* A variable sized array. */
6564 itype = build_min (MINUS_EXPR, sizetype, size, integer_one_node);
6567 HOST_WIDE_INT saved_processing_template_decl;
6569 /* Compute the index of the largest element in the array. It is
6570 one less than the number of elements in the array. We save
6571 and restore PROCESSING_TEMPLATE_DECL so that computations in
6572 cp_build_binary_op will be appropriately folded. */
6573 saved_processing_template_decl = processing_template_decl;
6574 processing_template_decl = 0;
6575 itype = cp_build_binary_op (MINUS_EXPR,
6576 cp_convert (ssizetype, size),
6577 cp_convert (ssizetype, integer_one_node));
6578 itype = fold (itype);
6579 processing_template_decl = saved_processing_template_decl;
6581 if (!TREE_CONSTANT (itype))
6582 /* A variable sized array. */
6583 itype = variable_size (itype);
6584 /* Make sure that there was no overflow when creating to a signed
6585 index type. (For example, on a 32-bit machine, an array with
6586 size 2^32 - 1 is too big.) */
6587 else if (TREE_CODE (itype) == INTEGER_CST
6588 && TREE_OVERFLOW (itype))
6590 error ("overflow in array dimension");
6591 TREE_OVERFLOW (itype) = 0;
6595 /* Create and return the appropriate index type. */
6596 return build_index_type (itype);
6599 /* Returns the scope (if any) in which the entity declared by
6600 DECLARATOR will be located. If the entity was declared with an
6601 unqualified name, NULL_TREE is returned. */
6604 get_scope_of_declarator (const cp_declarator *declarator)
6606 while (declarator && declarator->kind != cdk_id)
6607 declarator = declarator->declarator;
6609 /* If the declarator-id is a SCOPE_REF, the scope in which the
6610 declaration occurs is the first operand. */
6612 && declarator->u.id.qualifying_scope)
6613 return declarator->u.id.qualifying_scope;
6615 /* Otherwise, the declarator is not a qualified name; the entity will
6616 be declared in the current scope. */
6620 /* Returns an ARRAY_TYPE for an array with SIZE elements of the
6621 indicated TYPE. If non-NULL, NAME is the NAME of the declaration
6625 create_array_type_for_decl (tree name, tree type, tree size)
6627 tree itype = NULL_TREE;
6628 const char* error_msg;
6630 /* If things have already gone awry, bail now. */
6631 if (type == error_mark_node || size == error_mark_node)
6632 return error_mark_node;
6634 /* Assume that everything will go OK. */
6637 /* There are some types which cannot be array elements. */
6638 switch (TREE_CODE (type))
6641 error_msg = "array of void";
6645 error_msg = "array of functions";
6648 case REFERENCE_TYPE:
6649 error_msg = "array of references";
6653 error_msg = "array of function members";
6660 /* If something went wrong, issue an error-message and return. */
6664 error ("declaration of %qD as %s", name, error_msg);
6666 error ("creating %s", error_msg);
6668 return error_mark_node;
6673 The constant expressions that specify the bounds of the arrays
6674 can be omitted only for the first member of the sequence. */
6675 if (TREE_CODE (type) == ARRAY_TYPE && !TYPE_DOMAIN (type))
6678 error ("declaration of %qD as multidimensional array must "
6679 "have bounds for all dimensions except the first",
6682 error ("multidimensional array must have bounds for all "
6683 "dimensions except the first");
6685 return error_mark_node;
6688 /* Figure out the index type for the array. */
6690 itype = compute_array_index_type (name, size);
6693 T is called the array element type; this type shall not be [...] an
6694 abstract class type. */
6695 abstract_virtuals_error (name, type);
6697 return build_cplus_array_type (type, itype);
6700 /* Check that it's OK to declare a function with the indicated TYPE.
6701 SFK indicates the kind of special function (if any) that this
6702 function is. OPTYPE is the type given in a conversion operator
6703 declaration, or the class type for a constructor/destructor.
6704 Returns the actual return type of the function; that
6705 may be different than TYPE if an error occurs, or for certain
6706 special functions. */
6709 check_special_function_return_type (special_function_kind sfk,
6715 case sfk_constructor:
6717 error ("return type specification for constructor invalid");
6719 if (targetm.cxx.cdtor_returns_this () && !TYPE_FOR_JAVA (optype))
6720 type = build_pointer_type (optype);
6722 type = void_type_node;
6725 case sfk_destructor:
6727 error ("return type specification for destructor invalid");
6728 /* We can't use the proper return type here because we run into
6729 problems with ambiguous bases and covariant returns.
6730 Java classes are left unchanged because (void *) isn't a valid
6731 Java type, and we don't want to change the Java ABI. */
6732 if (targetm.cxx.cdtor_returns_this () && !TYPE_FOR_JAVA (optype))
6733 type = build_pointer_type (void_type_node);
6735 type = void_type_node;
6738 case sfk_conversion:
6739 if (type && !same_type_p (type, optype))
6740 error ("operator %qT declared to return %qT", optype, type);
6742 pedwarn ("return type specified for %<operator %T%>", optype);
6753 /* A variable or data member (whose unqualified name is IDENTIFIER)
6754 has been declared with the indicated TYPE. If the TYPE is not
6755 acceptable, issue an error message and return a type to use for
6756 error-recovery purposes. */
6759 check_var_type (tree identifier, tree type)
6761 if (VOID_TYPE_P (type))
6764 error ("unnamed variable or field declared void");
6765 else if (TREE_CODE (identifier) == IDENTIFIER_NODE)
6767 gcc_assert (!IDENTIFIER_OPNAME_P (identifier));
6768 error ("variable or field %qE declared void", identifier);
6771 error ("variable or field declared void");
6772 type = integer_type_node;
6778 /* Given declspecs and a declarator (abstract or otherwise), determine
6779 the name and type of the object declared and construct a DECL node
6782 DECLSPECS is a chain of tree_list nodes whose value fields
6783 are the storage classes and type specifiers.
6785 DECL_CONTEXT says which syntactic context this declaration is in:
6786 NORMAL for most contexts. Make a VAR_DECL or FUNCTION_DECL or TYPE_DECL.
6787 FUNCDEF for a function definition. Like NORMAL but a few different
6788 error messages in each case. Return value may be zero meaning
6789 this definition is too screwy to try to parse.
6790 MEMFUNCDEF for a function definition. Like FUNCDEF but prepares to
6791 handle member functions (which have FIELD context).
6792 Return value may be zero meaning this definition is too screwy to
6794 PARM for a parameter declaration (either within a function prototype
6795 or before a function body). Make a PARM_DECL, or return void_type_node.
6796 CATCHPARM for a parameter declaration before a catch clause.
6797 TYPENAME if for a typename (in a cast or sizeof).
6798 Don't make a DECL node; just return the ..._TYPE node.
6799 FIELD for a struct or union field; make a FIELD_DECL.
6800 BITFIELD for a field with specified width.
6801 INITIALIZED is 1 if the decl has an initializer.
6803 ATTRLIST is a pointer to the list of attributes, which may be NULL
6804 if there are none; *ATTRLIST may be modified if attributes from inside
6805 the declarator should be applied to the declaration.
6807 When this function is called, scoping variables (such as
6808 CURRENT_CLASS_TYPE) should reflect the scope in which the
6809 declaration occurs, not the scope in which the new declaration will
6810 be placed. For example, on:
6814 when grokdeclarator is called for `S::f', the CURRENT_CLASS_TYPE
6815 should not be `S'. */
6818 grokdeclarator (const cp_declarator *declarator,
6819 const cp_decl_specifier_seq *declspecs,
6820 enum decl_context decl_context,
6824 tree type = NULL_TREE;
6826 int virtualp, explicitp, friendp, inlinep, staticp;
6827 int explicit_int = 0;
6828 int explicit_char = 0;
6829 int defaulted_int = 0;
6830 tree dependent_name = NULL_TREE;
6832 tree typedef_decl = NULL_TREE;
6833 const char *name = NULL;
6834 tree typedef_type = NULL_TREE;
6835 /* True if this declarator is a function definition. */
6836 bool funcdef_flag = false;
6837 cp_declarator_kind innermost_code = cdk_error;
6840 /* See the code below that used this. */
6841 tree decl_attr = NULL_TREE;
6844 /* Keep track of what sort of function is being processed
6845 so that we can warn about default return values, or explicit
6846 return values which do not match prescribed defaults. */
6847 special_function_kind sfk = sfk_none;
6849 tree dname = NULL_TREE;
6850 tree ctor_return_type = NULL_TREE;
6851 enum overload_flags flags = NO_SPECIAL;
6852 /* cv-qualifiers that apply to the declarator, for a declaration of
6853 a member function. */
6854 cp_cv_quals memfn_quals = TYPE_UNQUALIFIED;
6855 /* cv-qualifiers that apply to the type specified by the DECLSPECS. */
6857 tree raises = NULL_TREE;
6858 int template_count = 0;
6859 tree returned_attrs = NULL_TREE;
6860 tree parms = NULL_TREE;
6861 const cp_declarator *id_declarator;
6862 /* The unqualified name of the declarator; either an
6863 IDENTIFIER_NODE, BIT_NOT_EXPR, or TEMPLATE_ID_EXPR. */
6864 tree unqualified_id;
6865 /* The class type, if any, in which this entity is located,
6866 or NULL_TREE if none. Note that this value may be different from
6867 the current class type; for example if an attempt is made to declare
6868 "A::f" inside "B", this value will be "A". */
6869 tree ctype = current_class_type;
6870 /* The NAMESPACE_DECL for the namespace in which this entity is
6871 located. If an unqualified name is used to declare the entity,
6872 this value will be NULL_TREE, even if the entity is located at
6874 tree in_namespace = NULL_TREE;
6875 cp_storage_class storage_class;
6876 bool unsigned_p, signed_p, short_p, long_p, thread_p;
6877 bool type_was_error_mark_node = false;
6879 signed_p = declspecs->specs[(int)ds_signed];
6880 unsigned_p = declspecs->specs[(int)ds_unsigned];
6881 short_p = declspecs->specs[(int)ds_short];
6882 long_p = declspecs->specs[(int)ds_long];
6883 longlong = declspecs->specs[(int)ds_long] >= 2;
6884 thread_p = declspecs->specs[(int)ds_thread];
6886 if (decl_context == FUNCDEF)
6887 funcdef_flag = true, decl_context = NORMAL;
6888 else if (decl_context == MEMFUNCDEF)
6889 funcdef_flag = true, decl_context = FIELD;
6890 else if (decl_context == BITFIELD)
6891 bitfield = 1, decl_context = FIELD;
6893 /* Look inside a declarator for the name being declared
6894 and get it as a string, for an error message. */
6895 for (id_declarator = declarator;
6897 id_declarator = id_declarator->declarator)
6899 if (id_declarator->kind != cdk_id)
6900 innermost_code = id_declarator->kind;
6902 switch (id_declarator->kind)
6905 if (id_declarator->declarator
6906 && id_declarator->declarator->kind == cdk_id)
6908 sfk = id_declarator->declarator->u.id.sfk;
6909 if (sfk == sfk_destructor)
6916 tree qualifying_scope = id_declarator->u.id.qualifying_scope;
6917 tree decl = id_declarator->u.id.unqualified_name;
6920 if (qualifying_scope)
6922 if (TYPE_P (qualifying_scope))
6924 ctype = qualifying_scope;
6925 if (innermost_code != cdk_function
6926 && current_class_type
6927 && !UNIQUELY_DERIVED_FROM_P (ctype,
6928 current_class_type))
6930 error ("type %qT is not derived from type %qT",
6931 ctype, current_class_type);
6932 return error_mark_node;
6935 else if (TREE_CODE (qualifying_scope) == NAMESPACE_DECL)
6936 in_namespace = qualifying_scope;
6938 switch (TREE_CODE (decl))
6944 if (innermost_code != cdk_function)
6946 error ("declaration of %qD as non-function", decl);
6947 return error_mark_node;
6949 else if (!qualifying_scope
6950 && !(current_class_type && at_class_scope_p ()))
6952 error ("declaration of %qD as non-member", decl);
6953 return error_mark_node;
6956 type = TREE_OPERAND (decl, 0);
6957 name = IDENTIFIER_POINTER (constructor_name (type));
6962 case TEMPLATE_ID_EXPR:
6964 tree fns = TREE_OPERAND (decl, 0);
6967 if (TREE_CODE (dname) == COMPONENT_REF)
6968 dname = TREE_OPERAND (dname, 1);
6969 if (TREE_CODE (dname) != IDENTIFIER_NODE)
6971 gcc_assert (is_overloaded_fn (dname));
6972 dname = DECL_NAME (get_first_fn (dname));
6977 case IDENTIFIER_NODE:
6978 if (TREE_CODE (decl) == IDENTIFIER_NODE)
6981 if (C_IS_RESERVED_WORD (dname))
6983 error ("declarator-id missing; using reserved word %qD",
6985 name = IDENTIFIER_POINTER (dname);
6987 else if (!IDENTIFIER_TYPENAME_P (dname))
6988 name = IDENTIFIER_POINTER (dname);
6991 gcc_assert (flags == NO_SPECIAL);
6992 flags = TYPENAME_FLAG;
6993 ctor_return_type = TREE_TYPE (dname);
6994 sfk = sfk_conversion;
6995 if (is_typename_at_global_scope (dname))
6996 name = IDENTIFIER_POINTER (dname);
6998 name = "<invalid operator>";
7014 return error_mark_node;
7020 if (id_declarator->kind == cdk_id)
7026 The declarator in a function-definition shall have the form
7027 D1 ( parameter-declaration-clause) ... */
7028 if (funcdef_flag && innermost_code != cdk_function)
7030 error ("function definition does not declare parameters");
7031 return error_mark_node;
7034 if (((dname && IDENTIFIER_OPNAME_P (dname)) || flags == TYPENAME_FLAG)
7035 && innermost_code != cdk_function
7036 && ! (ctype && !declspecs->any_specifiers_p))
7038 error ("declaration of %qD as non-function", dname);
7039 return error_mark_node;
7042 /* Anything declared one level down from the top level
7043 must be one of the parameters of a function
7044 (because the body is at least two levels down). */
7046 /* This heuristic cannot be applied to C++ nodes! Fixed, however,
7047 by not allowing C++ class definitions to specify their parameters
7048 with xdecls (must be spec.d in the parmlist).
7050 Since we now wait to push a class scope until we are sure that
7051 we are in a legitimate method context, we must set oldcname
7052 explicitly (since current_class_name is not yet alive).
7054 We also want to avoid calling this a PARM if it is in a namespace. */
7056 if (decl_context == NORMAL && !toplevel_bindings_p ())
7058 struct cp_binding_level *b = current_binding_level;
7059 current_binding_level = b->level_chain;
7060 if (current_binding_level != 0 && toplevel_bindings_p ())
7061 decl_context = PARM;
7062 current_binding_level = b;
7066 name = decl_context == PARM ? "parameter" : "type name";
7068 /* If there were multiple types specified in the decl-specifier-seq,
7069 issue an error message. */
7070 if (declspecs->multiple_types_p)
7071 error ("two or more data types in declaration of %qs", name);
7072 /* Extract the basic type from the decl-specifier-seq. */
7073 type = declspecs->type;
7074 if (type == error_mark_node)
7077 type_was_error_mark_node = true;
7079 /* If the entire declaration is itself tagged as deprecated then
7080 suppress reports of deprecated items. */
7081 if (type && TREE_DEPRECATED (type)
7082 && deprecated_state != DEPRECATED_SUPPRESS)
7083 warn_deprecated_use (type);
7084 if (type && TREE_CODE (type) == TYPE_DECL)
7086 typedef_decl = type;
7087 type = TREE_TYPE (typedef_decl);
7089 /* No type at all: default to `int', and set DEFAULTED_INT
7090 because it was not a user-defined typedef. */
7091 if (type == NULL_TREE && (signed_p || unsigned_p || long_p || short_p))
7093 /* These imply 'int'. */
7094 type = integer_type_node;
7098 explicit_int = declspecs->explicit_int_p;
7099 explicit_char = declspecs->explicit_char_p;
7102 /* See the code below that used this. */
7104 decl_attr = DECL_ATTRIBUTES (typedef_decl);
7106 typedef_type = type;
7109 if (sfk != sfk_conversion)
7110 ctor_return_type = ctype;
7112 if (sfk != sfk_none)
7113 type = check_special_function_return_type (sfk, type,
7115 else if (type == NULL_TREE)
7121 /* We handle `main' specially here, because 'main () { }' is so
7122 common. With no options, it is allowed. With -Wreturn-type,
7123 it is a warning. It is only an error with -pedantic-errors. */
7124 is_main = (funcdef_flag
7125 && dname && MAIN_NAME_P (dname)
7126 && ctype == NULL_TREE
7127 && in_namespace == NULL_TREE
7128 && current_namespace == global_namespace);
7130 if (type_was_error_mark_node)
7131 /* We've already issued an error, don't complain more. */;
7132 else if (in_system_header || flag_ms_extensions)
7133 /* Allow it, sigh. */;
7134 else if (pedantic || ! is_main)
7135 pedwarn ("ISO C++ forbids declaration of %qs with no type", name);
7136 else if (warn_return_type)
7137 warning (0, "ISO C++ forbids declaration of %qs with no type", name);
7139 type = integer_type_node;
7144 /* Now process the modifiers that were specified
7145 and check for invalid combinations. */
7147 /* Long double is a special combination. */
7148 if (long_p && !longlong && TYPE_MAIN_VARIANT (type) == double_type_node)
7151 type = build_qualified_type (long_double_type_node,
7152 cp_type_quals (type));
7155 /* Check all other uses of type modifiers. */
7157 if (unsigned_p || signed_p || long_p || short_p)
7161 if ((signed_p || unsigned_p) && TREE_CODE (type) != INTEGER_TYPE)
7162 error ("%<signed%> or %<unsigned%> invalid for %qs", name);
7163 else if (signed_p && unsigned_p)
7164 error ("%<signed%> and %<unsigned%> specified together for %qs", name);
7165 else if (longlong && TREE_CODE (type) != INTEGER_TYPE)
7166 error ("%<long long%> invalid for %qs", name);
7167 else if (long_p && TREE_CODE (type) == REAL_TYPE)
7168 error ("%<long%> invalid for %qs", name);
7169 else if (short_p && TREE_CODE (type) == REAL_TYPE)
7170 error ("%<short%> invalid for %qs", name);
7171 else if ((long_p || short_p) && explicit_char)
7172 error ("%<long%> or %<short%> specified with char for %qs", name);
7173 else if (long_p && short_p)
7174 error ("%<long%> and %<short%> specified together for %qs", name);
7178 if (!explicit_int && !defaulted_int && !explicit_char && pedantic)
7180 pedwarn ("long, short, signed or unsigned used invalidly for %qs",
7182 if (flag_pedantic_errors)
7187 /* Discard the type modifiers if they are invalid. */
7198 /* Decide whether an integer type is signed or not.
7199 Optionally treat bitfields as signed by default. */
7203 It is implementation-defined whether a plain (neither
7204 explicitly signed or unsigned) char, short, int, or long
7205 bit-field is signed or unsigned.
7207 Naturally, we extend this to long long as well. Note that
7208 this does not include wchar_t. */
7209 || (bitfield && !flag_signed_bitfields
7211 /* A typedef for plain `int' without `signed' can be
7212 controlled just like plain `int', but a typedef for
7213 `signed int' cannot be so controlled. */
7215 && C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl))
7216 && TREE_CODE (type) == INTEGER_TYPE
7217 && !same_type_p (TYPE_MAIN_VARIANT (type), wchar_type_node)))
7220 type = long_long_unsigned_type_node;
7222 type = long_unsigned_type_node;
7224 type = short_unsigned_type_node;
7225 else if (type == char_type_node)
7226 type = unsigned_char_type_node;
7227 else if (typedef_decl)
7228 type = c_common_unsigned_type (type);
7230 type = unsigned_type_node;
7232 else if (signed_p && type == char_type_node)
7233 type = signed_char_type_node;
7235 type = long_long_integer_type_node;
7237 type = long_integer_type_node;
7239 type = short_integer_type_node;
7241 if (declspecs->specs[(int)ds_complex])
7243 if (TREE_CODE (type) != INTEGER_TYPE && TREE_CODE (type) != REAL_TYPE)
7244 error ("complex invalid for %qs", name);
7245 /* If we just have "complex", it is equivalent to
7246 "complex double", but if any modifiers at all are specified it is
7247 the complex form of TYPE. E.g, "complex short" is
7248 "complex short int". */
7250 else if (defaulted_int && ! longlong
7251 && ! (long_p || short_p || signed_p || unsigned_p))
7252 type = complex_double_type_node;
7253 else if (type == integer_type_node)
7254 type = complex_integer_type_node;
7255 else if (type == float_type_node)
7256 type = complex_float_type_node;
7257 else if (type == double_type_node)
7258 type = complex_double_type_node;
7259 else if (type == long_double_type_node)
7260 type = complex_long_double_type_node;
7262 type = build_complex_type (type);
7265 type_quals = TYPE_UNQUALIFIED;
7266 if (declspecs->specs[(int)ds_const])
7267 type_quals |= TYPE_QUAL_CONST;
7268 if (declspecs->specs[(int)ds_volatile])
7269 type_quals |= TYPE_QUAL_VOLATILE;
7270 if (declspecs->specs[(int)ds_restrict])
7271 type_quals |= TYPE_QUAL_RESTRICT;
7272 if (sfk == sfk_conversion && type_quals != TYPE_UNQUALIFIED)
7273 error ("qualifiers are not allowed on declaration of %<operator %T%>",
7276 if (TREE_CODE (type) == FUNCTION_TYPE
7277 && type_quals != TYPE_UNQUALIFIED)
7279 /* This was an error in C++98 (cv-qualifiers cannot be added to
7280 a function type), but DR 295 makes the code well-formed by
7281 dropping the extra qualifiers. */
7284 tree bad_type = build_qualified_type (type, type_quals);
7285 pedwarn ("ignoring %qV qualifiers added to function type %qT",
7288 type_quals = TYPE_UNQUALIFIED;
7290 type_quals |= cp_type_quals (type);
7291 type = cp_build_qualified_type_real
7292 (type, type_quals, ((typedef_decl && !DECL_ARTIFICIAL (typedef_decl)
7293 ? tf_ignore_bad_quals : 0) | tf_warning_or_error));
7294 /* We might have ignored or rejected some of the qualifiers. */
7295 type_quals = cp_type_quals (type);
7298 inlinep = !! declspecs->specs[(int)ds_inline];
7299 virtualp = !! declspecs->specs[(int)ds_virtual];
7300 explicitp = !! declspecs->specs[(int)ds_explicit];
7302 storage_class = declspecs->storage_class;
7303 if (storage_class == sc_static)
7304 staticp = 1 + (decl_context == FIELD);
7306 if (virtualp && staticp == 2)
7308 error ("member %qD cannot be declared both virtual and static", dname);
7309 storage_class = sc_none;
7312 friendp = !! declspecs->specs[(int)ds_friend];
7314 if (dependent_name && !friendp)
7316 error ("%<%T::%D%> is not a valid declarator", ctype, dependent_name);
7317 return error_mark_node;
7320 /* Issue errors about use of storage classes for parameters. */
7321 if (decl_context == PARM)
7323 if (declspecs->specs[(int)ds_typedef])
7324 error ("typedef declaration invalid in parameter declaration");
7325 else if (storage_class == sc_static
7326 || storage_class == sc_extern
7328 error ("storage class specifiers invalid in parameter declarations");
7331 /* Give error if `virtual' is used outside of class declaration. */
7333 && (current_class_name == NULL_TREE || decl_context != FIELD))
7335 error ("virtual outside class declaration");
7339 /* Static anonymous unions are dealt with here. */
7340 if (staticp && decl_context == TYPENAME
7342 && ANON_AGGR_TYPE_P (declspecs->type))
7343 decl_context = FIELD;
7345 /* Warn about storage classes that are invalid for certain
7346 kinds of declarations (parameters, typenames, etc.). */
7347 if (declspecs->multiple_storage_classes_p)
7349 error ("multiple storage classes in declaration of %qs", name);
7350 storage_class = sc_none;
7354 && storage_class != sc_extern
7355 && storage_class != sc_static)
7356 || declspecs->specs[(int)ds_typedef]))
7358 error ("multiple storage classes in declaration of %qs", name);
7361 else if (decl_context != NORMAL
7362 && ((storage_class != sc_none
7363 && storage_class != sc_mutable)
7366 if ((decl_context == PARM || decl_context == CATCHPARM)
7367 && (storage_class == sc_register
7368 || storage_class == sc_auto))
7370 else if (declspecs->specs[(int)ds_typedef])
7372 else if (decl_context == FIELD
7373 /* C++ allows static class elements. */
7374 && storage_class == sc_static)
7375 /* C++ also allows inlines and signed and unsigned elements,
7376 but in those cases we don't come in here. */
7380 if (decl_context == FIELD)
7381 error ("storage class specified for %qs", name);
7384 if (decl_context == PARM || decl_context == CATCHPARM)
7385 error ("storage class specified for parameter %qs", name);
7387 error ("storage class specified for typename");
7389 if (storage_class == sc_register
7390 || storage_class == sc_auto
7391 || storage_class == sc_extern
7393 storage_class = sc_none;
7396 else if (storage_class == sc_extern && initialized
7399 if (toplevel_bindings_p ())
7401 /* It's common practice (and completely valid) to have a const
7402 be initialized and declared extern. */
7403 if (!(type_quals & TYPE_QUAL_CONST))
7404 warning (0, "%qs initialized and declared %<extern%>", name);
7407 error ("%qs has both %<extern%> and initializer", name);
7409 else if (storage_class == sc_extern && funcdef_flag
7410 && ! toplevel_bindings_p ())
7411 error ("nested function %qs declared %<extern%>", name);
7412 else if (toplevel_bindings_p ())
7414 if (storage_class == sc_auto)
7415 error ("top-level declaration of %qs specifies %<auto%>", name);
7418 && storage_class != sc_extern
7419 && storage_class != sc_static)
7421 error ("function-scope %qs implicitly auto and declared %<__thread%>",
7426 if (storage_class && friendp)
7427 error ("storage class specifiers invalid in friend function declarations");
7430 unqualified_id = NULL_TREE;
7433 unqualified_id = id_declarator->u.id.unqualified_name;
7434 switch (TREE_CODE (unqualified_id))
7438 = constructor_name (TREE_OPERAND (unqualified_id, 0));
7441 case IDENTIFIER_NODE:
7442 case TEMPLATE_ID_EXPR:
7450 /* Determine the type of the entity declared by recurring on the
7452 for (; declarator; declarator = declarator->declarator)
7454 const cp_declarator *inner_declarator;
7457 if (type == error_mark_node)
7458 return error_mark_node;
7460 attrs = declarator->attributes;
7466 if (declarator == NULL || declarator->kind == cdk_id)
7467 attr_flags |= (int) ATTR_FLAG_DECL_NEXT;
7468 if (declarator->kind == cdk_function)
7469 attr_flags |= (int) ATTR_FLAG_FUNCTION_NEXT;
7470 if (declarator->kind == cdk_array)
7471 attr_flags |= (int) ATTR_FLAG_ARRAY_NEXT;
7472 returned_attrs = decl_attributes (&type,
7473 chainon (returned_attrs, attrs),
7477 if (declarator->kind == cdk_id)
7480 inner_declarator = declarator->declarator;
7482 switch (declarator->kind)
7485 type = create_array_type_for_decl (dname, type,
7486 declarator->u.array.bounds);
7494 /* Declaring a function type.
7495 Make sure we have a valid type for the function to return. */
7497 /* We now know that the TYPE_QUALS don't apply to the
7498 decl, but to its return type. */
7499 type_quals = TYPE_UNQUALIFIED;
7501 /* Warn about some types functions can't return. */
7503 if (TREE_CODE (type) == FUNCTION_TYPE)
7505 error ("%qs declared as function returning a function", name);
7506 type = integer_type_node;
7508 if (TREE_CODE (type) == ARRAY_TYPE)
7510 error ("%qs declared as function returning an array", name);
7511 type = integer_type_node;
7514 /* Pick up type qualifiers which should be applied to `this'. */
7515 memfn_quals = declarator->u.function.qualifiers;
7517 /* Pick up the exception specifications. */
7518 raises = declarator->u.function.exception_specification;
7520 /* Say it's a definition only for the CALL_EXPR
7521 closest to the identifier. */
7522 funcdecl_p = inner_declarator && inner_declarator->kind == cdk_id;
7524 if (ctype == NULL_TREE
7525 && decl_context == FIELD
7527 && (friendp == 0 || dname == current_class_name))
7528 ctype = current_class_type;
7530 if (ctype && (sfk == sfk_constructor
7531 || sfk == sfk_destructor))
7533 /* We are within a class's scope. If our declarator name
7534 is the same as the class name, and we are defining
7535 a function, then it is a constructor/destructor, and
7536 therefore returns a void type. */
7538 /* ISO C++ 12.4/2. A destructor may not be declared
7539 const or volatile. A destructor may not be
7542 ISO C++ 12.1. A constructor may not be declared
7543 const or volatile. A constructor may not be
7544 virtual. A constructor may not be static. */
7546 error ((flags == DTOR_FLAG)
7547 ? "destructor cannot be static member function"
7548 : "constructor cannot be static member function");
7551 error ((flags == DTOR_FLAG)
7552 ? "destructors may not be cv-qualified"
7553 : "constructors may not be cv-qualified");
7554 memfn_quals = TYPE_UNQUALIFIED;
7557 if (decl_context == FIELD
7558 && !member_function_or_else (ctype,
7561 return error_mark_node;
7563 if (flags != DTOR_FLAG)
7565 /* It's a constructor. */
7570 pedwarn ("constructors cannot be declared virtual");
7573 if (decl_context == FIELD
7574 && sfk != sfk_constructor)
7575 return error_mark_node;
7577 if (decl_context == FIELD)
7583 error ("can't initialize friend function %qs", name);
7586 /* Cannot be both friend and virtual. */
7587 error ("virtual functions cannot be friends");
7590 if (decl_context == NORMAL)
7591 error ("friend declaration not in class definition");
7592 if (current_function_decl && funcdef_flag)
7593 error ("can't define friend function %qs in a local "
7598 arg_types = grokparms (declarator->u.function.parameters,
7601 if (inner_declarator
7602 && inner_declarator->kind == cdk_id
7603 && inner_declarator->u.id.sfk == sfk_destructor
7604 && arg_types != void_list_node)
7606 error ("destructors may not have parameters");
7607 arg_types = void_list_node;
7611 type = build_function_type (type, arg_types);
7618 /* Filter out pointers-to-references and references-to-references.
7619 We can get these if a TYPE_DECL is used. */
7621 if (TREE_CODE (type) == REFERENCE_TYPE)
7623 error (declarator->kind == cdk_reference
7624 ? "cannot declare reference to %q#T"
7625 : "cannot declare pointer to %q#T", type);
7626 type = TREE_TYPE (type);
7628 else if (VOID_TYPE_P (type))
7630 if (declarator->kind == cdk_reference)
7631 error ("cannot declare reference to %q#T", type);
7632 else if (declarator->kind == cdk_ptrmem)
7633 error ("cannot declare pointer to %q#T member", type);
7636 /* We now know that the TYPE_QUALS don't apply to the decl,
7637 but to the target of the pointer. */
7638 type_quals = TYPE_UNQUALIFIED;
7640 if (declarator->kind == cdk_ptrmem
7641 && (TREE_CODE (type) == FUNCTION_TYPE || memfn_quals))
7643 memfn_quals |= cp_type_quals (type);
7644 type = build_memfn_type (type,
7645 declarator->u.pointer.class_type,
7647 memfn_quals = TYPE_UNQUALIFIED;
7650 if (declarator->kind == cdk_reference)
7652 if (!VOID_TYPE_P (type))
7653 type = build_reference_type (type);
7655 else if (TREE_CODE (type) == METHOD_TYPE)
7656 type = build_ptrmemfunc_type (build_pointer_type (type));
7657 else if (declarator->kind == cdk_ptrmem)
7659 gcc_assert (TREE_CODE (declarator->u.pointer.class_type)
7661 if (declarator->u.pointer.class_type == error_mark_node)
7662 /* We will already have complained. */
7663 type = error_mark_node;
7665 type = build_ptrmem_type (declarator->u.pointer.class_type,
7669 type = build_pointer_type (type);
7671 /* Process a list of type modifier keywords (such as
7672 const or volatile) that were given inside the `*' or `&'. */
7674 if (declarator->u.pointer.qualifiers)
7677 = cp_build_qualified_type (type,
7678 declarator->u.pointer.qualifiers);
7679 type_quals = cp_type_quals (type);
7692 if (unqualified_id && TREE_CODE (unqualified_id) == TEMPLATE_ID_EXPR
7693 && TREE_CODE (type) != FUNCTION_TYPE
7694 && TREE_CODE (type) != METHOD_TYPE)
7696 error ("template-id %qD used as a declarator",
7698 unqualified_id = dname;
7701 /* If TYPE is a FUNCTION_TYPE, but the function name was explicitly
7702 qualified with a class-name, turn it into a METHOD_TYPE, unless
7703 we know that the function is static. We take advantage of this
7704 opportunity to do other processing that pertains to entities
7705 explicitly declared to be class members. Note that if DECLARATOR
7706 is non-NULL, we know it is a cdk_id declarator; otherwise, we
7707 would not have exited the loop above. */
7709 && declarator->u.id.qualifying_scope
7710 && TYPE_P (declarator->u.id.qualifying_scope))
7714 ctype = declarator->u.id.qualifying_scope;
7715 ctype = TYPE_MAIN_VARIANT (ctype);
7717 while (t != NULL_TREE && CLASS_TYPE_P (t))
7719 /* You're supposed to have one `template <...>' for every
7720 template class, but you don't need one for a full
7721 specialization. For example:
7723 template <class T> struct S{};
7724 template <> struct S<int> { void f(); };
7725 void S<int>::f () {}
7727 is correct; there shouldn't be a `template <>' for the
7728 definition of `S<int>::f'. */
7729 if (CLASSTYPE_TEMPLATE_SPECIALIZATION (t)
7730 && !any_dependent_template_arguments_p (CLASSTYPE_TI_ARGS (t)))
7731 /* T is an explicit (not partial) specialization. All
7732 containing classes must therefore also be explicitly
7735 if ((CLASSTYPE_USE_TEMPLATE (t) || CLASSTYPE_IS_TEMPLATE (t))
7736 && PRIMARY_TEMPLATE_P (CLASSTYPE_TI_TEMPLATE (t)))
7737 template_count += 1;
7739 t = TYPE_MAIN_DECL (t);
7740 t = DECL_CONTEXT (t);
7743 if (ctype == current_class_type)
7746 pedwarn ("member functions are implicitly friends of their class");
7748 pedwarn ("extra qualification %<%T::%> on member %qs",
7751 else if (/* If the qualifying type is already complete, then we
7752 can skip the following checks. */
7753 !COMPLETE_TYPE_P (ctype)
7754 && (/* If the function is being defined, then
7755 qualifying type must certainly be complete. */
7757 /* A friend declaration of "T::f" is OK, even if
7758 "T" is a template parameter. But, if this
7759 function is not a friend, the qualifying type
7761 || (!friendp && !CLASS_TYPE_P (ctype))
7762 /* For a declaration, the type need not be
7763 complete, if either it is dependent (since there
7764 is no meaningful definition of complete in that
7765 case) or the qualifying class is currently being
7767 || !(dependent_type_p (ctype)
7768 || currently_open_class (ctype)))
7769 /* Check that the qualifying type is complete. */
7770 && !complete_type_or_else (ctype, NULL_TREE))
7771 return error_mark_node;
7772 else if (TREE_CODE (type) == FUNCTION_TYPE)
7774 tree sname = declarator->u.id.unqualified_name;
7776 if (current_class_type
7777 && (!friendp || funcdef_flag))
7780 ? "cannot define member function %<%T::%s%> within %<%T%>"
7781 : "cannot declare member function %<%T::%s%> within %<%T%>",
7782 ctype, name, current_class_type);
7783 return error_mark_node;
7786 if (TREE_CODE (sname) == IDENTIFIER_NODE
7787 && NEW_DELETE_OPNAME_P (sname))
7788 /* Overloaded operator new and operator delete
7789 are always static functions. */
7792 type = build_memfn_type (type, ctype, memfn_quals);
7794 else if (declspecs->specs[(int)ds_typedef]
7795 && current_class_type)
7797 error ("cannot declare member %<%T::%s%> within %qT",
7798 ctype, name, current_class_type);
7799 return error_mark_node;
7803 /* Now TYPE has the actual type. */
7808 *attrlist = chainon (returned_attrs, *attrlist);
7810 attrlist = &returned_attrs;
7813 /* Did array size calculations overflow? */
7815 if (TREE_CODE (type) == ARRAY_TYPE
7816 && COMPLETE_TYPE_P (type)
7817 && TREE_CODE (TYPE_SIZE_UNIT (type)) == INTEGER_CST
7818 && TREE_OVERFLOW (TYPE_SIZE_UNIT (type)))
7820 error ("size of array %qs is too large", name);
7821 /* If we proceed with the array type as it is, we'll eventually
7822 crash in tree_low_cst(). */
7823 type = error_mark_node;
7826 if ((decl_context == FIELD || decl_context == PARM)
7827 && !processing_template_decl
7828 && variably_modified_type_p (type, NULL_TREE))
7830 if (decl_context == FIELD)
7831 error ("data member may not have variably modified type %qT", type);
7833 error ("parameter may not have variably modified type %qT", type);
7834 type = error_mark_node;
7837 if (explicitp == 1 || (explicitp && friendp))
7839 /* [dcl.fct.spec] The explicit specifier shall only be used in
7840 declarations of constructors within a class definition. */
7841 error ("only declarations of constructors can be %<explicit%>");
7845 if (storage_class == sc_mutable)
7847 if (decl_context != FIELD || friendp)
7849 error ("non-member %qs cannot be declared %<mutable%>", name);
7850 storage_class = sc_none;
7852 else if (decl_context == TYPENAME || declspecs->specs[(int)ds_typedef])
7854 error ("non-object member %qs cannot be declared %<mutable%>", name);
7855 storage_class = sc_none;
7857 else if (TREE_CODE (type) == FUNCTION_TYPE
7858 || TREE_CODE (type) == METHOD_TYPE)
7860 error ("function %qs cannot be declared %<mutable%>", name);
7861 storage_class = sc_none;
7865 error ("static %qs cannot be declared %<mutable%>", name);
7866 storage_class = sc_none;
7868 else if (type_quals & TYPE_QUAL_CONST)
7870 error ("const %qs cannot be declared %<mutable%>", name);
7871 storage_class = sc_none;
7875 /* If this is declaring a typedef name, return a TYPE_DECL. */
7876 if (declspecs->specs[(int)ds_typedef] && decl_context != TYPENAME)
7880 /* Note that the grammar rejects storage classes
7881 in typenames, fields or parameters. */
7882 if (current_lang_name == lang_name_java)
7883 TYPE_FOR_JAVA (type) = 1;
7885 /* This declaration:
7887 typedef void f(int) const;
7889 declares a function type which is not a member of any
7890 particular class, but which is cv-qualified; for
7891 example "f S::*" declares a pointer to a const-qualified
7892 member function of S. We record the cv-qualification in the
7894 if (memfn_quals && TREE_CODE (type) == FUNCTION_TYPE)
7895 type = cp_build_qualified_type (type, memfn_quals);
7897 if (decl_context == FIELD)
7898 decl = build_lang_decl (TYPE_DECL, unqualified_id, type);
7900 decl = build_decl (TYPE_DECL, unqualified_id, type);
7901 if (id_declarator && declarator->u.id.qualifying_scope)
7902 error ("%Jtypedef name may not be a nested-name-specifier", decl);
7904 if (decl_context != FIELD)
7906 if (!current_function_decl)
7907 DECL_CONTEXT (decl) = FROB_CONTEXT (current_namespace);
7908 else if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (current_function_decl)
7909 || (DECL_MAYBE_IN_CHARGE_DESTRUCTOR_P
7910 (current_function_decl)))
7911 /* The TYPE_DECL is "abstract" because there will be
7912 clones of this constructor/destructor, and there will
7913 be copies of this TYPE_DECL generated in those
7915 DECL_ABSTRACT (decl) = 1;
7917 else if (constructor_name_p (unqualified_id, current_class_type))
7918 pedwarn ("ISO C++ forbids nested type %qD with same name "
7919 "as enclosing class",
7922 /* If the user declares "typedef struct {...} foo" then the
7923 struct will have an anonymous name. Fill that name in now.
7924 Nothing can refer to it, so nothing needs know about the name
7926 if (type != error_mark_node
7929 && TREE_CODE (TYPE_NAME (type)) == TYPE_DECL
7930 && TYPE_ANONYMOUS_P (type)
7931 /* Don't do this if there are attributes. */
7932 && (!attrlist || !*attrlist)
7933 && cp_type_quals (type) == TYPE_UNQUALIFIED)
7935 tree oldname = TYPE_NAME (type);
7938 /* Replace the anonymous name with the real name everywhere. */
7939 for (t = TYPE_MAIN_VARIANT (type); t; t = TYPE_NEXT_VARIANT (t))
7940 if (TYPE_NAME (t) == oldname)
7941 TYPE_NAME (t) = decl;
7943 if (TYPE_LANG_SPECIFIC (type))
7944 TYPE_WAS_ANONYMOUS (type) = 1;
7946 /* If this is a typedef within a template class, the nested
7947 type is a (non-primary) template. The name for the
7948 template needs updating as well. */
7949 if (TYPE_LANG_SPECIFIC (type) && CLASSTYPE_TEMPLATE_INFO (type))
7950 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type))
7951 = TYPE_IDENTIFIER (type);
7953 /* FIXME remangle member functions; member functions of a
7954 type with external linkage have external linkage. */
7957 /* Any qualifiers on a function type typedef have already been
7959 if (memfn_quals && !ctype && TREE_CODE (type) == FUNCTION_TYPE)
7960 memfn_quals = TYPE_UNQUALIFIED;
7963 || (typedef_decl && C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl)))
7964 C_TYPEDEF_EXPLICITLY_SIGNED (decl) = 1;
7966 bad_specifiers (decl, "type", virtualp,
7967 memfn_quals != TYPE_UNQUALIFIED,
7968 inlinep, friendp, raises != NULL_TREE);
7973 /* Detect the case of an array type of unspecified size
7974 which came, as such, direct from a typedef name.
7975 We must copy the type, so that the array's domain can be
7976 individually set by the object's initializer. */
7978 if (type && typedef_type
7979 && TREE_CODE (type) == ARRAY_TYPE && !TYPE_DOMAIN (type)
7980 && TYPE_MAIN_VARIANT (type) == TYPE_MAIN_VARIANT (typedef_type))
7981 type = build_cplus_array_type (TREE_TYPE (type), NULL_TREE);
7983 /* Detect where we're using a typedef of function type to declare a
7984 function. PARMS will not be set, so we must create it now. */
7986 if (type == typedef_type && TREE_CODE (type) == FUNCTION_TYPE)
7988 tree decls = NULL_TREE;
7991 for (args = TYPE_ARG_TYPES (type); args; args = TREE_CHAIN (args))
7993 tree decl = cp_build_parm_decl (NULL_TREE, TREE_VALUE (args));
7995 TREE_CHAIN (decl) = decls;
7999 parms = nreverse (decls);
8001 if (decl_context != TYPENAME)
8003 /* A cv-qualifier-seq shall only be part of the function type
8004 for a non-static member function. [8.3.5/4 dcl.fct] */
8005 if (cp_type_quals (type) != TYPE_UNQUALIFIED
8006 && (current_class_type == NULL_TREE || staticp) )
8008 error ("qualified function types cannot be used to declare %s functions",
8009 (staticp? "static member" : "free"));
8010 type = TYPE_MAIN_VARIANT (type);
8013 /* The qualifiers on the function type become the qualifiers on
8014 the non-static member function. */
8015 memfn_quals |= cp_type_quals (type);
8019 /* If this is a type name (such as, in a cast or sizeof),
8020 compute the type and return it now. */
8022 if (decl_context == TYPENAME)
8024 /* Note that the grammar rejects storage classes
8025 in typenames, fields or parameters. */
8026 if (type_quals != TYPE_UNQUALIFIED)
8027 type_quals = TYPE_UNQUALIFIED;
8029 /* Special case: "friend class foo" looks like a TYPENAME context. */
8032 if (type_quals != TYPE_UNQUALIFIED)
8034 error ("type qualifiers specified for friend class declaration");
8035 type_quals = TYPE_UNQUALIFIED;
8039 error ("%<inline%> specified for friend class declaration");
8045 /* Don't allow friend declaration without a class-key. */
8046 if (TREE_CODE (type) == TEMPLATE_TYPE_PARM)
8047 pedwarn ("template parameters cannot be friends");
8048 else if (TREE_CODE (type) == TYPENAME_TYPE)
8049 pedwarn ("friend declaration requires class-key, "
8050 "i.e. %<friend class %T::%D%>",
8051 TYPE_CONTEXT (type), TYPENAME_TYPE_FULLNAME (type));
8053 pedwarn ("friend declaration requires class-key, "
8054 "i.e. %<friend %#T%>",
8058 /* Only try to do this stuff if we didn't already give up. */
8059 if (type != integer_type_node)
8061 /* A friendly class? */
8062 if (current_class_type)
8063 make_friend_class (current_class_type, TYPE_MAIN_VARIANT (type),
8066 error ("trying to make class %qT a friend of global scope",
8069 type = void_type_node;
8072 else if (memfn_quals)
8074 if (ctype == NULL_TREE)
8076 if (TREE_CODE (type) != METHOD_TYPE)
8077 error ("invalid qualifiers on non-member function type");
8079 ctype = TYPE_METHOD_BASETYPE (type);
8082 type = build_memfn_type (type, ctype, memfn_quals);
8087 else if (unqualified_id == NULL_TREE && decl_context != PARM
8088 && decl_context != CATCHPARM
8089 && TREE_CODE (type) != UNION_TYPE
8092 error ("abstract declarator %qT used as declaration", type);
8093 return error_mark_node;
8096 /* Only functions may be declared using an operator-function-id. */
8098 && IDENTIFIER_OPNAME_P (unqualified_id)
8099 && TREE_CODE (type) != FUNCTION_TYPE
8100 && TREE_CODE (type) != METHOD_TYPE)
8102 error ("declaration of %qD as non-function", unqualified_id);
8103 return error_mark_node;
8106 /* We don't check parameter types here because we can emit a better
8107 error message later. */
8108 if (decl_context != PARM)
8109 type = check_var_type (unqualified_id, type);
8111 /* Now create the decl, which may be a VAR_DECL, a PARM_DECL
8112 or a FUNCTION_DECL, depending on DECL_CONTEXT and TYPE. */
8114 if (decl_context == PARM || decl_context == CATCHPARM)
8116 if (ctype || in_namespace)
8117 error ("cannot use %<::%> in parameter declaration");
8119 /* A parameter declared as an array of T is really a pointer to T.
8120 One declared as a function is really a pointer to a function.
8121 One declared as a member is really a pointer to member. */
8123 if (TREE_CODE (type) == ARRAY_TYPE)
8125 /* Transfer const-ness of array into that of type pointed to. */
8126 type = build_pointer_type (TREE_TYPE (type));
8127 type_quals = TYPE_UNQUALIFIED;
8129 else if (TREE_CODE (type) == FUNCTION_TYPE)
8130 type = build_pointer_type (type);
8136 if (decl_context == PARM)
8138 decl = cp_build_parm_decl (unqualified_id, type);
8140 bad_specifiers (decl, "parameter", virtualp,
8141 memfn_quals != TYPE_UNQUALIFIED,
8142 inlinep, friendp, raises != NULL_TREE);
8144 else if (decl_context == FIELD)
8146 /* The C99 flexible array extension. */
8147 if (!staticp && TREE_CODE (type) == ARRAY_TYPE
8148 && TYPE_DOMAIN (type) == NULL_TREE)
8150 tree itype = compute_array_index_type (dname, integer_zero_node);
8151 type = build_cplus_array_type (TREE_TYPE (type), itype);
8154 if (type == error_mark_node)
8156 /* Happens when declaring arrays of sizes which
8157 are error_mark_node, for example. */
8160 else if (in_namespace && !friendp)
8162 /* Something like struct S { int N::j; }; */
8163 error ("invalid use of %<::%>");
8164 return error_mark_node;
8166 else if (TREE_CODE (type) == FUNCTION_TYPE)
8169 tree function_context;
8173 if (ctype == NULL_TREE)
8174 ctype = current_class_type;
8176 if (ctype == NULL_TREE)
8178 error ("can't make %qD into a method -- not in a class",
8180 return error_mark_node;
8183 /* ``A union may [ ... ] not [ have ] virtual functions.''
8185 if (virtualp && TREE_CODE (ctype) == UNION_TYPE)
8187 error ("function %qD declared virtual inside a union",
8189 return error_mark_node;
8192 if (NEW_DELETE_OPNAME_P (unqualified_id))
8196 error ("%qD cannot be declared virtual, since it "
8202 else if (staticp < 2)
8203 type = build_memfn_type (type, ctype, memfn_quals);
8206 /* Check that the name used for a destructor makes sense. */
8207 if (sfk == sfk_destructor)
8211 gcc_assert (friendp);
8212 error ("expected qualified name in friend declaration "
8213 "for destructor %qD",
8214 id_declarator->u.id.unqualified_name);
8215 return error_mark_node;
8218 if (!same_type_p (TREE_OPERAND
8219 (id_declarator->u.id.unqualified_name, 0),
8222 error ("declaration of %qD as member of %qT",
8223 id_declarator->u.id.unqualified_name, ctype);
8224 return error_mark_node;
8228 /* Tell grokfndecl if it needs to set TREE_PUBLIC on the node. */
8229 function_context = (ctype != NULL_TREE) ?
8230 decl_function_context (TYPE_MAIN_DECL (ctype)) : NULL_TREE;
8231 publicp = (! friendp || ! staticp)
8232 && function_context == NULL_TREE;
8233 decl = grokfndecl (ctype, type,
8234 TREE_CODE (unqualified_id) != TEMPLATE_ID_EXPR
8235 ? unqualified_id : dname,
8238 virtualp, flags, memfn_quals, raises,
8239 friendp ? -1 : 0, friendp, publicp, inlinep,
8241 funcdef_flag, template_count, in_namespace, attrlist);
8242 if (decl == NULL_TREE)
8243 return error_mark_node;
8245 /* This clobbers the attrs stored in `decl' from `attrlist'. */
8246 /* The decl and setting of decl_attr is also turned off. */
8247 decl = build_decl_attribute_variant (decl, decl_attr);
8250 /* [class.conv.ctor]
8252 A constructor declared without the function-specifier
8253 explicit that can be called with a single parameter
8254 specifies a conversion from the type of its first
8255 parameter to the type of its class. Such a constructor
8256 is called a converting constructor. */
8258 DECL_NONCONVERTING_P (decl) = 1;
8259 else if (DECL_CONSTRUCTOR_P (decl))
8261 /* The constructor can be called with exactly one
8262 parameter if there is at least one parameter, and
8263 any subsequent parameters have default arguments.
8264 Ignore any compiler-added parms. */
8265 tree arg_types = FUNCTION_FIRST_USER_PARMTYPE (decl);
8267 if (arg_types == void_list_node
8269 && TREE_CHAIN (arg_types)
8270 && TREE_CHAIN (arg_types) != void_list_node
8271 && !TREE_PURPOSE (TREE_CHAIN (arg_types))))
8272 DECL_NONCONVERTING_P (decl) = 1;
8275 else if (TREE_CODE (type) == METHOD_TYPE)
8277 /* We only get here for friend declarations of
8278 members of other classes. */
8279 /* All method decls are public, so tell grokfndecl to set
8280 TREE_PUBLIC, also. */
8281 decl = grokfndecl (ctype, type,
8282 TREE_CODE (unqualified_id) != TEMPLATE_ID_EXPR
8283 ? unqualified_id : dname,
8286 virtualp, flags, memfn_quals, raises,
8287 friendp ? -1 : 0, friendp, 1, 0, sfk,
8288 funcdef_flag, template_count, in_namespace,
8290 if (decl == NULL_TREE)
8291 return error_mark_node;
8293 else if (!staticp && !dependent_type_p (type)
8294 && !COMPLETE_TYPE_P (complete_type (type))
8295 && (TREE_CODE (type) != ARRAY_TYPE || initialized == 0))
8298 error ("field %qD has incomplete type", unqualified_id);
8300 error ("name %qT has incomplete type", type);
8302 /* If we're instantiating a template, tell them which
8303 instantiation made the field's type be incomplete. */
8304 if (current_class_type
8305 && TYPE_NAME (current_class_type)
8306 && IDENTIFIER_TEMPLATE (TYPE_IDENTIFIER (current_class_type))
8308 && declspecs->type == type)
8309 error (" in instantiation of template %qT",
8310 current_class_type);
8312 type = error_mark_node;
8319 error ("%qE is neither function nor member function; "
8320 "cannot be declared friend", unqualified_id);
8328 /* Friends are treated specially. */
8329 if (ctype == current_class_type)
8330 ; /* We already issued a pedwarn. */
8331 else if (decl && DECL_NAME (decl))
8333 if (template_class_depth (current_class_type) == 0)
8335 decl = check_explicit_specialization
8336 (unqualified_id, decl, template_count,
8337 2 * funcdef_flag + 4);
8338 if (decl == error_mark_node)
8339 return error_mark_node;
8342 decl = do_friend (ctype, unqualified_id, decl,
8348 return error_mark_node;
8351 /* Structure field. It may not be a function, except for C++. */
8353 if (decl == NULL_TREE)
8359 /* An attempt is being made to initialize a non-static
8360 member. But, from [class.mem]:
8362 4 A member-declarator can contain a
8363 constant-initializer only if it declares a static
8364 member (_class.static_) of integral or enumeration
8365 type, see _class.static.data_.
8367 This used to be relatively common practice, but
8368 the rest of the compiler does not correctly
8369 handle the initialization unless the member is
8370 static so we make it static below. */
8371 pedwarn ("ISO C++ forbids initialization of member %qD",
8373 pedwarn ("making %qD static", unqualified_id);
8377 if (uses_template_parms (type))
8378 /* We'll check at instantiation time. */
8380 else if (check_static_variable_definition (unqualified_id,
8382 /* If we just return the declaration, crashes
8383 will sometimes occur. We therefore return
8384 void_type_node, as if this was a friend
8385 declaration, to cause callers to completely
8386 ignore this declaration. */
8387 return error_mark_node;
8392 /* C++ allows static class members. All other work
8393 for this is done by grokfield. */
8394 decl = build_lang_decl (VAR_DECL, unqualified_id, type);
8395 set_linkage_for_static_data_member (decl);
8396 /* Even if there is an in-class initialization, DECL
8397 is considered undefined until an out-of-class
8398 definition is provided. */
8399 DECL_EXTERNAL (decl) = 1;
8403 if (targetm.have_tls)
8404 DECL_TLS_MODEL (decl) = decl_default_tls_model (decl);
8406 /* A mere warning is sure to result in improper
8407 semantics at runtime. Don't bother to allow this to
8409 error ("thread-local storage not supported for this target");
8414 decl = build_decl (FIELD_DECL, unqualified_id, type);
8415 DECL_NONADDRESSABLE_P (decl) = bitfield;
8416 if (storage_class == sc_mutable)
8418 DECL_MUTABLE_P (decl) = 1;
8419 storage_class = sc_none;
8423 bad_specifiers (decl, "field", virtualp,
8424 memfn_quals != TYPE_UNQUALIFIED,
8425 inlinep, friendp, raises != NULL_TREE);
8428 else if (TREE_CODE (type) == FUNCTION_TYPE
8429 || TREE_CODE (type) == METHOD_TYPE)
8434 if (!unqualified_id)
8435 return error_mark_node;
8437 if (TREE_CODE (unqualified_id) == TEMPLATE_ID_EXPR)
8438 original_name = dname;
8440 original_name = unqualified_id;
8442 if (storage_class == sc_auto)
8443 error ("storage class %<auto%> invalid for function %qs", name);
8444 else if (storage_class == sc_register)
8445 error ("storage class %<register%> invalid for function %qs", name);
8447 error ("storage class %<__thread%> invalid for function %qs", name);
8449 /* Function declaration not at top level.
8450 Storage classes other than `extern' are not allowed
8451 and `extern' makes no difference. */
8452 if (! toplevel_bindings_p ()
8453 && (storage_class == sc_static
8454 || declspecs->specs[(int)ds_inline])
8457 if (storage_class == sc_static)
8458 pedwarn ("%<static%> specified invalid for function %qs "
8459 "declared out of global scope", name);
8461 pedwarn ("%<inline%> specifier invalid for function %qs "
8462 "declared out of global scope", name);
8465 if (ctype == NULL_TREE)
8469 error ("virtual non-class function %qs", name);
8473 else if (TREE_CODE (type) == FUNCTION_TYPE && staticp < 2
8474 && !NEW_DELETE_OPNAME_P (original_name))
8475 type = build_method_type_directly (ctype,
8477 TYPE_ARG_TYPES (type));
8479 /* Record presence of `static'. */
8480 publicp = (ctype != NULL_TREE
8481 || storage_class == sc_extern
8482 || storage_class != sc_static);
8484 decl = grokfndecl (ctype, type, original_name, parms, unqualified_id,
8485 virtualp, flags, memfn_quals, raises,
8487 publicp, inlinep, sfk, funcdef_flag,
8488 template_count, in_namespace, attrlist);
8489 if (decl == NULL_TREE)
8490 return error_mark_node;
8494 int invalid_static = 0;
8496 /* Don't allow a static member function in a class, and forbid
8497 declaring main to be static. */
8498 if (TREE_CODE (type) == METHOD_TYPE)
8500 pedwarn ("cannot declare member function %qD to have "
8501 "static linkage", decl);
8504 else if (current_function_decl)
8506 /* FIXME need arm citation */
8507 error ("cannot declare static function inside another function");
8514 storage_class = sc_none;
8520 /* It's a variable. */
8522 /* An uninitialized decl with `extern' is a reference. */
8523 decl = grokvardecl (type, unqualified_id,
8526 (type_quals & TYPE_QUAL_CONST) != 0,
8527 ctype ? ctype : in_namespace);
8528 bad_specifiers (decl, "variable", virtualp,
8529 memfn_quals != TYPE_UNQUALIFIED,
8530 inlinep, friendp, raises != NULL_TREE);
8534 DECL_CONTEXT (decl) = ctype;
8537 pedwarn ("%<static%> may not be used when defining "
8538 "(as opposed to declaring) a static data member");
8540 storage_class = sc_none;
8542 if (storage_class == sc_register && TREE_STATIC (decl))
8544 error ("static member %qD declared %<register%>", decl);
8545 storage_class = sc_none;
8547 if (storage_class == sc_extern && pedantic)
8549 pedwarn ("cannot explicitly declare member %q#D to have "
8552 storage_class = sc_none;
8557 /* Record `register' declaration for warnings on &
8558 and in case doing stupid register allocation. */
8560 if (storage_class == sc_register)
8561 DECL_REGISTER (decl) = 1;
8562 else if (storage_class == sc_extern)
8563 DECL_THIS_EXTERN (decl) = 1;
8564 else if (storage_class == sc_static)
8565 DECL_THIS_STATIC (decl) = 1;
8567 /* Record constancy and volatility. There's no need to do this
8568 when processing a template; we'll do this for the instantiated
8569 declaration based on the type of DECL. */
8570 if (!processing_template_decl)
8571 cp_apply_type_quals_to_decl (type_quals, decl);
8577 /* Subroutine of start_function. Ensure that each of the parameter
8578 types (as listed in PARMS) is complete, as is required for a
8579 function definition. */
8582 require_complete_types_for_parms (tree parms)
8584 for (; parms; parms = TREE_CHAIN (parms))
8586 if (dependent_type_p (TREE_TYPE (parms)))
8588 if (!VOID_TYPE_P (TREE_TYPE (parms))
8589 && complete_type_or_else (TREE_TYPE (parms), parms))
8591 relayout_decl (parms);
8592 DECL_ARG_TYPE (parms) = type_passed_as (TREE_TYPE (parms));
8595 /* grokparms or complete_type_or_else will have already issued
8597 TREE_TYPE (parms) = error_mark_node;
8601 /* Returns nonzero if T is a local variable. */
8604 local_variable_p (tree t)
8606 if ((TREE_CODE (t) == VAR_DECL
8607 /* A VAR_DECL with a context that is a _TYPE is a static data
8609 && !TYPE_P (CP_DECL_CONTEXT (t))
8610 /* Any other non-local variable must be at namespace scope. */
8611 && !DECL_NAMESPACE_SCOPE_P (t))
8612 || (TREE_CODE (t) == PARM_DECL))
8618 /* Returns nonzero if T is an automatic local variable or a label.
8619 (These are the declarations that need to be remapped when the code
8620 containing them is duplicated.) */
8623 nonstatic_local_decl_p (tree t)
8625 return ((local_variable_p (t) && !TREE_STATIC (t))
8626 || TREE_CODE (t) == LABEL_DECL
8627 || TREE_CODE (t) == RESULT_DECL);
8630 /* Like local_variable_p, but suitable for use as a tree-walking
8634 local_variable_p_walkfn (tree *tp, int *walk_subtrees,
8635 void *data ATTRIBUTE_UNUSED)
8637 if (local_variable_p (*tp) && !DECL_ARTIFICIAL (*tp))
8639 else if (TYPE_P (*tp))
8646 /* Check that ARG, which is a default-argument expression for a
8647 parameter DECL, is valid. Returns ARG, or ERROR_MARK_NODE, if
8648 something goes wrong. DECL may also be a _TYPE node, rather than a
8649 DECL, if there is no DECL available. */
8652 check_default_argument (tree decl, tree arg)
8657 if (TREE_CODE (arg) == DEFAULT_ARG)
8658 /* We get a DEFAULT_ARG when looking at an in-class declaration
8659 with a default argument. Ignore the argument for now; we'll
8660 deal with it after the class is complete. */
8669 decl_type = TREE_TYPE (decl);
8671 if (arg == error_mark_node
8672 || decl == error_mark_node
8673 || TREE_TYPE (arg) == error_mark_node
8674 || decl_type == error_mark_node)
8675 /* Something already went wrong. There's no need to check
8677 return error_mark_node;
8679 /* [dcl.fct.default]
8681 A default argument expression is implicitly converted to the
8683 if (!TREE_TYPE (arg)
8684 || !can_convert_arg (decl_type, TREE_TYPE (arg), arg, LOOKUP_NORMAL))
8687 error ("default argument for %q#D has type %qT",
8688 decl, TREE_TYPE (arg));
8690 error ("default argument for parameter of type %qT has type %qT",
8691 decl_type, TREE_TYPE (arg));
8693 return error_mark_node;
8696 /* [dcl.fct.default]
8698 Local variables shall not be used in default argument
8701 The keyword `this' shall not be used in a default argument of a
8703 var = walk_tree_without_duplicates (&arg, local_variable_p_walkfn,
8707 error ("default argument %qE uses local variable %qD", arg, var);
8708 return error_mark_node;
8715 /* Decode the list of parameter types for a function type.
8716 Given the list of things declared inside the parens,
8717 return a list of types.
8719 If this parameter does not end with an ellipsis, we append
8722 *PARMS is set to the chain of PARM_DECLs created. */
8725 grokparms (cp_parameter_declarator *first_parm, tree *parms)
8727 tree result = NULL_TREE;
8728 tree decls = NULL_TREE;
8729 int ellipsis = !first_parm || first_parm->ellipsis_p;
8730 cp_parameter_declarator *parm;
8733 for (parm = first_parm; parm != NULL; parm = parm->next)
8735 tree type = NULL_TREE;
8736 tree init = parm->default_argument;
8740 if (parm == no_parameters)
8743 attrs = parm->decl_specifiers.attributes;
8744 parm->decl_specifiers.attributes = NULL_TREE;
8745 decl = grokdeclarator (parm->declarator, &parm->decl_specifiers,
8746 PARM, init != NULL_TREE, &attrs);
8747 if (! decl || TREE_TYPE (decl) == error_mark_node)
8751 cplus_decl_attributes (&decl, attrs, 0);
8753 type = TREE_TYPE (decl);
8754 if (VOID_TYPE_P (type))
8756 if (same_type_p (type, void_type_node)
8757 && DECL_SELF_REFERENCE_P (type)
8758 && !DECL_NAME (decl) && !result && !parm->next && !ellipsis)
8759 /* this is a parmlist of `(void)', which is ok. */
8761 cxx_incomplete_type_error (decl, type);
8762 /* It's not a good idea to actually create parameters of
8763 type `void'; other parts of the compiler assume that a
8764 void type terminates the parameter list. */
8765 type = error_mark_node;
8766 TREE_TYPE (decl) = error_mark_node;
8769 if (type != error_mark_node)
8771 /* Top-level qualifiers on the parameters are
8772 ignored for function types. */
8773 type = cp_build_qualified_type (type, 0);
8774 if (TREE_CODE (type) == METHOD_TYPE)
8776 error ("parameter %qD invalidly declared method type", decl);
8777 type = build_pointer_type (type);
8778 TREE_TYPE (decl) = type;
8780 else if (abstract_virtuals_error (decl, type))
8781 any_error = 1; /* Seems like a good idea. */
8782 else if (POINTER_TYPE_P (type))
8784 /* [dcl.fct]/6, parameter types cannot contain pointers
8785 (references) to arrays of unknown bound. */
8786 tree t = TREE_TYPE (type);
8787 int ptr = TYPE_PTR_P (type);
8793 else if (TREE_CODE (t) != ARRAY_TYPE)
8795 else if (!TYPE_DOMAIN (t))
8799 if (TREE_CODE (t) == ARRAY_TYPE)
8800 error ("parameter %qD includes %s to array of unknown "
8802 decl, ptr ? "pointer" : "reference", t);
8807 else if (init && !processing_template_decl)
8808 init = check_default_argument (decl, init);
8811 TREE_CHAIN (decl) = decls;
8813 result = tree_cons (init, type, result);
8815 decls = nreverse (decls);
8816 result = nreverse (result);
8818 result = chainon (result, void_list_node);
8825 /* D is a constructor or overloaded `operator='.
8827 Let T be the class in which D is declared. Then, this function
8830 -1 if D's is an ill-formed constructor or copy assignment operator
8831 whose first parameter is of type `T'.
8832 0 if D is not a copy constructor or copy assignment
8834 1 if D is a copy constructor or copy assignment operator whose
8835 first parameter is a reference to const qualified T.
8836 2 if D is a copy constructor or copy assignment operator whose
8837 first parameter is a reference to non-const qualified T.
8839 This function can be used as a predicate. Positive values indicate
8840 a copy constructor and nonzero values indicate a copy assignment
8850 if (!DECL_FUNCTION_MEMBER_P (d))
8851 /* Non-members are invalid. We complained, but kept the declaration. */
8854 if (TREE_CODE (d) == TEMPLATE_DECL
8855 || (DECL_TEMPLATE_INFO (d)
8856 && DECL_MEMBER_TEMPLATE_P (DECL_TI_TEMPLATE (d))))
8857 /* Instantiations of template member functions are never copy
8858 functions. Note that member functions of templated classes are
8859 represented as template functions internally, and we must
8860 accept those as copy functions. */
8863 args = FUNCTION_FIRST_USER_PARMTYPE (d);
8867 arg_type = TREE_VALUE (args);
8868 if (arg_type == error_mark_node)
8871 if (TYPE_MAIN_VARIANT (arg_type) == DECL_CONTEXT (d))
8873 /* Pass by value copy assignment operator. */
8876 else if (TREE_CODE (arg_type) == REFERENCE_TYPE
8877 && TYPE_MAIN_VARIANT (TREE_TYPE (arg_type)) == DECL_CONTEXT (d))
8879 if (CP_TYPE_CONST_P (TREE_TYPE (arg_type)))
8885 args = TREE_CHAIN (args);
8887 if (args && args != void_list_node && !TREE_PURPOSE (args))
8888 /* There are more non-optional args. */
8894 /* Remember any special properties of member function DECL. */
8896 void grok_special_member_properties (tree decl)
8900 if (!DECL_NONSTATIC_MEMBER_FUNCTION_P (decl))
8903 class_type = DECL_CONTEXT (decl);
8904 if (DECL_CONSTRUCTOR_P (decl))
8906 int ctor = copy_fn_p (decl);
8908 TYPE_HAS_CONSTRUCTOR (class_type) = 1;
8914 A non-template constructor for class X is a copy
8915 constructor if its first parameter is of type X&, const
8916 X&, volatile X& or const volatile X&, and either there
8917 are no other parameters or else all other parameters have
8918 default arguments. */
8919 TYPE_HAS_INIT_REF (class_type) = 1;
8921 TYPE_HAS_CONST_INIT_REF (class_type) = 1;
8923 else if (sufficient_parms_p (FUNCTION_FIRST_USER_PARMTYPE (decl)))
8924 TYPE_HAS_DEFAULT_CONSTRUCTOR (class_type) = 1;
8926 else if (DECL_OVERLOADED_OPERATOR_P (decl) == NOP_EXPR)
8930 A non-template assignment operator for class X is a copy
8931 assignment operator if its parameter is of type X, X&, const
8932 X&, volatile X& or const volatile X&. */
8934 int assop = copy_fn_p (decl);
8938 TYPE_HAS_ASSIGN_REF (class_type) = 1;
8940 TYPE_HAS_CONST_ASSIGN_REF (class_type) = 1;
8945 /* Check a constructor DECL has the correct form. Complains
8946 if the class has a constructor of the form X(X). */
8949 grok_ctor_properties (tree ctype, tree decl)
8951 int ctor_parm = copy_fn_p (decl);
8957 A declaration of a constructor for a class X is ill-formed if
8958 its first parameter is of type (optionally cv-qualified) X
8959 and either there are no other parameters or else all other
8960 parameters have default arguments.
8962 We *don't* complain about member template instantiations that
8963 have this form, though; they can occur as we try to decide
8964 what constructor to use during overload resolution. Since
8965 overload resolution will never prefer such a constructor to
8966 the non-template copy constructor (which is either explicitly
8967 or implicitly defined), there's no need to worry about their
8968 existence. Theoretically, they should never even be
8969 instantiated, but that's hard to forestall. */
8970 error ("invalid constructor; you probably meant %<%T (const %T&)%>",
8978 /* An operator with this code is unary, but can also be binary. */
8981 ambi_op_p (enum tree_code code)
8983 return (code == INDIRECT_REF
8984 || code == ADDR_EXPR
8985 || code == UNARY_PLUS_EXPR
8986 || code == NEGATE_EXPR
8987 || code == PREINCREMENT_EXPR
8988 || code == PREDECREMENT_EXPR);
8991 /* An operator with this name can only be unary. */
8994 unary_op_p (enum tree_code code)
8996 return (code == TRUTH_NOT_EXPR
8997 || code == BIT_NOT_EXPR
8998 || code == COMPONENT_REF
8999 || code == TYPE_EXPR);
9002 /* DECL is a declaration for an overloaded operator. If COMPLAIN is true,
9003 errors are issued for invalid declarations. */
9006 grok_op_properties (tree decl, bool complain)
9008 tree argtypes = TYPE_ARG_TYPES (TREE_TYPE (decl));
9010 int methodp = (TREE_CODE (TREE_TYPE (decl)) == METHOD_TYPE);
9011 tree name = DECL_NAME (decl);
9012 enum tree_code operator_code;
9017 /* Count the number of arguments and check for ellipsis. */
9018 for (argtype = argtypes, arity = 0;
9019 argtype && argtype != void_list_node;
9020 argtype = TREE_CHAIN (argtype))
9022 ellipsis_p = !argtype;
9024 class_type = DECL_CONTEXT (decl);
9025 if (class_type && !CLASS_TYPE_P (class_type))
9026 class_type = NULL_TREE;
9028 if (DECL_CONV_FN_P (decl))
9029 operator_code = TYPE_EXPR;
9033 #define DEF_OPERATOR(NAME, CODE, MANGLING, ARITY, ASSN_P) \
9034 if (ansi_opname (CODE) == name) \
9036 operator_code = (CODE); \
9039 else if (ansi_assopname (CODE) == name) \
9041 operator_code = (CODE); \
9042 DECL_ASSIGNMENT_OPERATOR_P (decl) = 1; \
9046 #include "operators.def"
9052 gcc_assert (operator_code != LAST_CPLUS_TREE_CODE);
9053 SET_OVERLOADED_OPERATOR_CODE (decl, operator_code);
9056 switch (operator_code)
9059 TYPE_HAS_NEW_OPERATOR (class_type) = 1;
9063 TYPE_GETS_DELETE (class_type) |= 1;
9067 TYPE_HAS_ARRAY_NEW_OPERATOR (class_type) = 1;
9070 case VEC_DELETE_EXPR:
9071 TYPE_GETS_DELETE (class_type) |= 2;
9078 /* [basic.std.dynamic.allocation]/1:
9080 A program is ill-formed if an allocation function is declared
9081 in a namespace scope other than global scope or declared static
9084 The same also holds true for deallocation functions. */
9085 if (operator_code == NEW_EXPR || operator_code == VEC_NEW_EXPR
9086 || operator_code == DELETE_EXPR || operator_code == VEC_DELETE_EXPR)
9088 if (DECL_NAMESPACE_SCOPE_P (decl))
9090 if (CP_DECL_CONTEXT (decl) != global_namespace)
9091 error ("%qD may not be declared within a namespace", decl);
9092 else if (!TREE_PUBLIC (decl))
9093 error ("%qD may not be declared as static", decl);
9097 if (operator_code == NEW_EXPR || operator_code == VEC_NEW_EXPR)
9098 TREE_TYPE (decl) = coerce_new_type (TREE_TYPE (decl));
9099 else if (operator_code == DELETE_EXPR || operator_code == VEC_DELETE_EXPR)
9100 TREE_TYPE (decl) = coerce_delete_type (TREE_TYPE (decl));
9103 /* An operator function must either be a non-static member function
9104 or have at least one parameter of a class, a reference to a class,
9105 an enumeration, or a reference to an enumeration. 13.4.0.6 */
9106 if (! methodp || DECL_STATIC_FUNCTION_P (decl))
9108 if (operator_code == TYPE_EXPR
9109 || operator_code == CALL_EXPR
9110 || operator_code == COMPONENT_REF
9111 || operator_code == ARRAY_REF
9112 || operator_code == NOP_EXPR)
9114 error ("%qD must be a nonstatic member function", decl);
9121 if (DECL_STATIC_FUNCTION_P (decl))
9123 error ("%qD must be either a non-static member "
9124 "function or a non-member function", decl);
9128 for (p = argtypes; p && p != void_list_node; p = TREE_CHAIN (p))
9130 tree arg = non_reference (TREE_VALUE (p));
9131 if (arg == error_mark_node)
9134 /* IS_AGGR_TYPE, rather than CLASS_TYPE_P, is used
9135 because these checks are performed even on
9136 template functions. */
9137 if (IS_AGGR_TYPE (arg) || TREE_CODE (arg) == ENUMERAL_TYPE)
9141 if (!p || p == void_list_node)
9146 error ("%qD must have an argument of class or "
9153 /* There are no restrictions on the arguments to an overloaded
9155 if (operator_code == CALL_EXPR)
9158 /* Warn about conversion operators that will never be used. */
9159 if (IDENTIFIER_TYPENAME_P (name)
9160 && ! DECL_TEMPLATE_INFO (decl)
9162 /* Warn only declaring the function; there is no need to
9163 warn again about out-of-class definitions. */
9164 && class_type == current_class_type)
9166 tree t = TREE_TYPE (name);
9167 int ref = (TREE_CODE (t) == REFERENCE_TYPE);
9168 const char *what = 0;
9171 t = TYPE_MAIN_VARIANT (TREE_TYPE (t));
9173 if (TREE_CODE (t) == VOID_TYPE)
9175 else if (class_type)
9177 if (t == class_type)
9178 what = "the same type";
9179 /* Don't force t to be complete here. */
9180 else if (IS_AGGR_TYPE (t)
9181 && COMPLETE_TYPE_P (t)
9182 && DERIVED_FROM_P (t, class_type))
9183 what = "a base class";
9187 warning (OPT_Wconversion, "conversion to %s%s will never use a type "
9188 "conversion operator",
9189 ref ? "a reference to " : "", what);
9192 if (operator_code == COND_EXPR)
9195 error ("ISO C++ prohibits overloading operator ?:");
9197 else if (ellipsis_p)
9198 error ("%qD must not have variable number of arguments", decl);
9199 else if (ambi_op_p (operator_code))
9202 /* We pick the one-argument operator codes by default, so
9203 we don't have to change anything. */
9205 else if (arity == 2)
9207 /* If we thought this was a unary operator, we now know
9208 it to be a binary operator. */
9209 switch (operator_code)
9212 operator_code = MULT_EXPR;
9216 operator_code = BIT_AND_EXPR;
9219 case UNARY_PLUS_EXPR:
9220 operator_code = PLUS_EXPR;
9224 operator_code = MINUS_EXPR;
9227 case PREINCREMENT_EXPR:
9228 operator_code = POSTINCREMENT_EXPR;
9231 case PREDECREMENT_EXPR:
9232 operator_code = POSTDECREMENT_EXPR;
9239 SET_OVERLOADED_OPERATOR_CODE (decl, operator_code);
9241 if ((operator_code == POSTINCREMENT_EXPR
9242 || operator_code == POSTDECREMENT_EXPR)
9243 && ! processing_template_decl
9244 && ! same_type_p (TREE_VALUE (TREE_CHAIN (argtypes)), integer_type_node))
9247 error ("postfix %qD must take %<int%> as its argument",
9251 ("postfix %qD must take %<int%> as its second argument",
9258 error ("%qD must take either zero or one argument", decl);
9260 error ("%qD must take either one or two arguments", decl);
9263 /* More Effective C++ rule 6. */
9265 && (operator_code == POSTINCREMENT_EXPR
9266 || operator_code == POSTDECREMENT_EXPR
9267 || operator_code == PREINCREMENT_EXPR
9268 || operator_code == PREDECREMENT_EXPR))
9270 tree arg = TREE_VALUE (argtypes);
9271 tree ret = TREE_TYPE (TREE_TYPE (decl));
9272 if (methodp || TREE_CODE (arg) == REFERENCE_TYPE)
9273 arg = TREE_TYPE (arg);
9274 arg = TYPE_MAIN_VARIANT (arg);
9275 if (operator_code == PREINCREMENT_EXPR
9276 || operator_code == PREDECREMENT_EXPR)
9278 if (TREE_CODE (ret) != REFERENCE_TYPE
9279 || !same_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (ret)),
9281 warning (OPT_Weffc__, "prefix %qD should return %qT", decl,
9282 build_reference_type (arg));
9286 if (!same_type_p (TYPE_MAIN_VARIANT (ret), arg))
9287 warning (OPT_Weffc__, "postfix %qD should return %qT", decl, arg);
9291 else if (unary_op_p (operator_code))
9296 error ("%qD must take %<void%>", decl);
9298 error ("%qD must take exactly one argument", decl);
9301 else /* if (binary_op_p (operator_code)) */
9306 error ("%qD must take exactly one argument", decl);
9308 error ("%qD must take exactly two arguments", decl);
9311 /* More Effective C++ rule 7. */
9313 && (operator_code == TRUTH_ANDIF_EXPR
9314 || operator_code == TRUTH_ORIF_EXPR
9315 || operator_code == COMPOUND_EXPR))
9316 warning (OPT_Weffc__, "user-defined %qD always evaluates both arguments",
9320 /* Effective C++ rule 23. */
9323 && !DECL_ASSIGNMENT_OPERATOR_P (decl)
9324 && (operator_code == PLUS_EXPR
9325 || operator_code == MINUS_EXPR
9326 || operator_code == TRUNC_DIV_EXPR
9327 || operator_code == MULT_EXPR
9328 || operator_code == TRUNC_MOD_EXPR)
9329 && TREE_CODE (TREE_TYPE (TREE_TYPE (decl))) == REFERENCE_TYPE)
9330 warning (OPT_Weffc__, "%qD should return by value", decl);
9333 for (; argtypes && argtypes != void_list_node;
9334 argtypes = TREE_CHAIN (argtypes))
9335 if (TREE_PURPOSE (argtypes))
9337 TREE_PURPOSE (argtypes) = NULL_TREE;
9338 if (operator_code == POSTINCREMENT_EXPR
9339 || operator_code == POSTDECREMENT_EXPR)
9342 pedwarn ("%qD cannot have default arguments", decl);
9345 error ("%qD cannot have default arguments", decl);
9352 /* Return a string giving the keyword associate with CODE. */
9355 tag_name (enum tag_types code)
9374 /* Name lookup in an elaborated-type-specifier (after the keyword
9375 indicated by TAG_CODE) has found the TYPE_DECL DECL. If the
9376 elaborated-type-specifier is invalid, issue a diagnostic and return
9377 error_mark_node; otherwise, return the *_TYPE to which it referred.
9378 If ALLOW_TEMPLATE_P is true, TYPE may be a class template. */
9381 check_elaborated_type_specifier (enum tag_types tag_code,
9383 bool allow_template_p)
9389 struct S { struct S *p; };
9391 name lookup will find the TYPE_DECL for the implicit "S::S"
9392 typedef. Adjust for that here. */
9393 if (DECL_SELF_REFERENCE_P (decl))
9394 decl = TYPE_NAME (TREE_TYPE (decl));
9396 type = TREE_TYPE (decl);
9398 /* Check TEMPLATE_TYPE_PARM first because DECL_IMPLICIT_TYPEDEF_P
9399 is false for this case as well. */
9400 if (TREE_CODE (type) == TEMPLATE_TYPE_PARM)
9402 error ("using template type parameter %qT after %qs",
9403 type, tag_name (tag_code));
9404 return error_mark_node;
9408 If the identifier resolves to a typedef-name or a template
9409 type-parameter, the elaborated-type-specifier is ill-formed.
9411 In other words, the only legitimate declaration to use in the
9412 elaborated type specifier is the implicit typedef created when
9413 the type is declared. */
9414 else if (!DECL_IMPLICIT_TYPEDEF_P (decl)
9415 && tag_code != typename_type)
9417 error ("using typedef-name %qD after %qs", decl, tag_name (tag_code));
9418 error ("%q+D has a previous declaration here", decl);
9419 return error_mark_node;
9421 else if (TREE_CODE (type) != RECORD_TYPE
9422 && TREE_CODE (type) != UNION_TYPE
9423 && tag_code != enum_type
9424 && tag_code != typename_type)
9426 error ("%qT referred to as %qs", type, tag_name (tag_code));
9427 error ("%q+T has a previous declaration here", type);
9428 return error_mark_node;
9430 else if (TREE_CODE (type) != ENUMERAL_TYPE
9431 && tag_code == enum_type)
9433 error ("%qT referred to as enum", type);
9434 error ("%q+T has a previous declaration here", type);
9435 return error_mark_node;
9437 else if (!allow_template_p
9438 && TREE_CODE (type) == RECORD_TYPE
9439 && CLASSTYPE_IS_TEMPLATE (type))
9441 /* If a class template appears as elaborated type specifier
9442 without a template header such as:
9444 template <class T> class C {};
9445 void f(class C); // No template header here
9447 then the required template argument is missing. */
9448 error ("template argument required for %<%s %T%>",
9449 tag_name (tag_code),
9450 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type)));
9451 return error_mark_node;
9457 /* Lookup NAME in elaborate type specifier in scope according to
9458 SCOPE and issue diagnostics if necessary.
9459 Return *_TYPE node upon success, NULL_TREE when the NAME is not
9460 found, and ERROR_MARK_NODE for type error. */
9463 lookup_and_check_tag (enum tag_types tag_code, tree name,
9464 tag_scope scope, bool template_header_p)
9468 if (scope == ts_global)
9470 /* First try ordinary name lookup, ignoring hidden class name
9471 injected via friend declaration. */
9472 decl = lookup_name_prefer_type (name, 2);
9473 /* If that fails, the name will be placed in the smallest
9474 non-class, non-function-prototype scope according to 3.3.1/5.
9475 We may already have a hidden name declared as friend in this
9476 scope. So lookup again but not ignoring hidden name.
9477 If we find one, that name will be made visible rather than
9478 creating a new tag. */
9480 decl = lookup_type_scope (name, ts_within_enclosing_non_class);
9483 decl = lookup_type_scope (name, scope);
9485 if (decl && DECL_CLASS_TEMPLATE_P (decl))
9486 decl = DECL_TEMPLATE_RESULT (decl);
9488 if (decl && TREE_CODE (decl) == TYPE_DECL)
9490 /* Look for invalid nested type:
9494 if (scope == ts_current && DECL_SELF_REFERENCE_P (decl))
9496 error ("%qD has the same name as the class in which it is "
9499 return error_mark_node;
9502 /* Two cases we need to consider when deciding if a class
9503 template is allowed as an elaborated type specifier:
9504 1. It is a self reference to its own class.
9505 2. It comes with a template header.
9509 template <class T> class C {
9510 class C *c1; // DECL_SELF_REFERENCE_P is true
9513 template <class U> class C; // template_header_p is true
9514 template <class T> class C<T>::D {
9515 class C *c2; // DECL_SELF_REFERENCE_P is true
9518 t = check_elaborated_type_specifier (tag_code,
9521 | DECL_SELF_REFERENCE_P (decl));
9528 /* Get the struct, enum or union (TAG_CODE says which) with tag NAME.
9529 Define the tag as a forward-reference if it is not defined.
9531 If a declaration is given, process it here, and report an error if
9532 multiple declarations are not identical.
9534 SCOPE is TS_CURRENT when this is also a definition. Only look in
9535 the current frame for the name (since C++ allows new names in any
9536 scope.) It is TS_WITHIN_ENCLOSING_NON_CLASS if this is a friend
9537 declaration. Only look beginning from the current scope outward up
9538 till the nearest non-class scope. Otherwise it is TS_GLOBAL.
9540 TEMPLATE_HEADER_P is true when this declaration is preceded by
9541 a set of template parameters. */
9544 xref_tag (enum tag_types tag_code, tree name,
9545 tag_scope scope, bool template_header_p)
9547 enum tree_code code;
9549 tree context = NULL_TREE;
9551 timevar_push (TV_NAME_LOOKUP);
9553 gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE);
9565 code = ENUMERAL_TYPE;
9571 /* In case of anonymous name, xref_tag is only called to
9572 make type node and push name. Name lookup is not required. */
9573 if (ANON_AGGRNAME_P (name))
9576 t = lookup_and_check_tag (tag_code, name,
9577 scope, template_header_p);
9579 if (t == error_mark_node)
9580 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
9582 if (scope != ts_current && t && current_class_type
9583 && template_class_depth (current_class_type)
9584 && template_header_p)
9586 /* Since SCOPE is not TS_CURRENT, we are not looking at a
9587 definition of this tag. Since, in addition, we are currently
9588 processing a (member) template declaration of a template
9589 class, we must be very careful; consider:
9596 { template <class V>
9597 friend struct S1; };
9599 Here, the S2::S1 declaration should not be confused with the
9600 outer declaration. In particular, the inner version should
9601 have a template parameter of level 2, not level 1. This
9602 would be particularly important if the member declaration
9605 template <class V = U> friend struct S1;
9607 say, when we should tsubst into `U' when instantiating
9608 S2. On the other hand, when presented with:
9618 we must find the inner binding eventually. We
9619 accomplish this by making sure that the new type we
9620 create to represent this declaration has the right
9622 context = TYPE_CONTEXT (t);
9628 /* If no such tag is yet defined, create a forward-reference node
9629 and record it as the "definition".
9630 When a real declaration of this type is found,
9631 the forward-reference will be altered into a real type. */
9632 if (code == ENUMERAL_TYPE)
9634 error ("use of enum %q#D without previous declaration", name);
9635 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
9639 t = make_aggr_type (code);
9640 TYPE_CONTEXT (t) = context;
9641 t = pushtag (name, t, scope);
9646 if (template_header_p && IS_AGGR_TYPE (t))
9647 redeclare_class_template (t, current_template_parms);
9648 else if (!processing_template_decl
9650 && CLASSTYPE_IS_TEMPLATE (t))
9652 error ("redeclaration of %qT as a non-template", t);
9653 t = error_mark_node;
9656 /* Make injected friend class visible. */
9657 if (scope != ts_within_enclosing_non_class
9658 && hidden_name_p (TYPE_NAME (t)))
9660 DECL_ANTICIPATED (TYPE_NAME (t)) = 0;
9661 DECL_FRIEND_P (TYPE_NAME (t)) = 0;
9663 if (TYPE_TEMPLATE_INFO (t))
9665 DECL_ANTICIPATED (TYPE_TI_TEMPLATE (t)) = 0;
9666 DECL_FRIEND_P (TYPE_TI_TEMPLATE (t)) = 0;
9671 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, t);
9675 xref_tag_from_type (tree old, tree id, tag_scope scope)
9677 enum tag_types tag_kind;
9679 if (TREE_CODE (old) == RECORD_TYPE)
9680 tag_kind = (CLASSTYPE_DECLARED_CLASS (old) ? class_type : record_type);
9682 tag_kind = union_type;
9684 if (id == NULL_TREE)
9685 id = TYPE_IDENTIFIER (old);
9687 return xref_tag (tag_kind, id, scope, false);
9690 /* Create the binfo hierarchy for REF with (possibly NULL) base list
9691 BASE_LIST. For each element on BASE_LIST the TREE_PURPOSE is an
9692 access_* node, and the TREE_VALUE is the type of the base-class.
9693 Non-NULL TREE_TYPE indicates virtual inheritance. */
9696 xref_basetypes (tree ref, tree base_list)
9699 tree binfo, base_binfo;
9700 unsigned max_vbases = 0; /* Maximum direct & indirect virtual bases. */
9701 unsigned max_bases = 0; /* Maximum direct bases. */
9703 tree default_access;
9704 tree igo_prev; /* Track Inheritance Graph Order. */
9706 if (ref == error_mark_node)
9709 /* The base of a derived class is private by default, all others are
9711 default_access = (TREE_CODE (ref) == RECORD_TYPE
9712 && CLASSTYPE_DECLARED_CLASS (ref)
9713 ? access_private_node : access_public_node);
9715 /* First, make sure that any templates in base-classes are
9716 instantiated. This ensures that if we call ourselves recursively
9717 we do not get confused about which classes are marked and which
9722 tree basetype = TREE_VALUE (*basep);
9724 if (!(processing_template_decl && uses_template_parms (basetype))
9725 && !complete_type_or_else (basetype, NULL))
9726 /* An incomplete type. Remove it from the list. */
9727 *basep = TREE_CHAIN (*basep);
9731 if (TREE_TYPE (*basep))
9733 if (CLASS_TYPE_P (basetype))
9734 max_vbases += VEC_length (tree, CLASSTYPE_VBASECLASSES (basetype));
9735 basep = &TREE_CHAIN (*basep);
9739 TYPE_MARKED_P (ref) = 1;
9741 /* The binfo slot should be empty, unless this is an (ill-formed)
9743 gcc_assert (!TYPE_BINFO (ref) || TYPE_SIZE (ref));
9744 gcc_assert (TYPE_MAIN_VARIANT (ref) == ref);
9746 binfo = make_tree_binfo (max_bases);
9748 TYPE_BINFO (ref) = binfo;
9749 BINFO_OFFSET (binfo) = size_zero_node;
9750 BINFO_TYPE (binfo) = ref;
9754 BINFO_BASE_ACCESSES (binfo) = VEC_alloc (tree, gc, max_bases);
9755 /* An aggregate cannot have baseclasses. */
9756 CLASSTYPE_NON_AGGREGATE (ref) = 1;
9758 if (TREE_CODE (ref) == UNION_TYPE)
9759 error ("derived union %qT invalid", ref);
9764 if (TYPE_FOR_JAVA (ref))
9765 error ("Java class %qT cannot have multiple bases", ref);
9770 CLASSTYPE_VBASECLASSES (ref) = VEC_alloc (tree, gc, max_vbases);
9772 if (TYPE_FOR_JAVA (ref))
9773 error ("Java class %qT cannot have virtual bases", ref);
9776 for (igo_prev = binfo; base_list; base_list = TREE_CHAIN (base_list))
9778 tree access = TREE_PURPOSE (base_list);
9779 int via_virtual = TREE_TYPE (base_list) != NULL_TREE;
9780 tree basetype = TREE_VALUE (base_list);
9782 if (access == access_default_node)
9783 access = default_access;
9785 if (TREE_CODE (basetype) == TYPE_DECL)
9786 basetype = TREE_TYPE (basetype);
9787 if (TREE_CODE (basetype) != RECORD_TYPE
9788 && TREE_CODE (basetype) != TYPENAME_TYPE
9789 && TREE_CODE (basetype) != TEMPLATE_TYPE_PARM
9790 && TREE_CODE (basetype) != BOUND_TEMPLATE_TEMPLATE_PARM)
9792 error ("base type %qT fails to be a struct or class type",
9797 if (TYPE_FOR_JAVA (basetype) && (current_lang_depth () == 0))
9798 TYPE_FOR_JAVA (ref) = 1;
9800 base_binfo = NULL_TREE;
9801 if (CLASS_TYPE_P (basetype) && !dependent_type_p (basetype))
9803 base_binfo = TYPE_BINFO (basetype);
9804 /* The original basetype could have been a typedef'd type. */
9805 basetype = BINFO_TYPE (base_binfo);
9807 /* Inherit flags from the base. */
9808 TYPE_HAS_NEW_OPERATOR (ref)
9809 |= TYPE_HAS_NEW_OPERATOR (basetype);
9810 TYPE_HAS_ARRAY_NEW_OPERATOR (ref)
9811 |= TYPE_HAS_ARRAY_NEW_OPERATOR (basetype);
9812 TYPE_GETS_DELETE (ref) |= TYPE_GETS_DELETE (basetype);
9813 TYPE_HAS_CONVERSION (ref) |= TYPE_HAS_CONVERSION (basetype);
9814 CLASSTYPE_DIAMOND_SHAPED_P (ref)
9815 |= CLASSTYPE_DIAMOND_SHAPED_P (basetype);
9816 CLASSTYPE_REPEATED_BASE_P (ref)
9817 |= CLASSTYPE_REPEATED_BASE_P (basetype);
9820 /* We must do this test after we've seen through a typedef
9822 if (TYPE_MARKED_P (basetype))
9824 if (basetype == ref)
9825 error ("recursive type %qT undefined", basetype);
9827 error ("duplicate base type %qT invalid", basetype);
9830 TYPE_MARKED_P (basetype) = 1;
9832 base_binfo = copy_binfo (base_binfo, basetype, ref,
9833 &igo_prev, via_virtual);
9834 if (!BINFO_INHERITANCE_CHAIN (base_binfo))
9835 BINFO_INHERITANCE_CHAIN (base_binfo) = binfo;
9837 BINFO_BASE_APPEND (binfo, base_binfo);
9838 BINFO_BASE_ACCESS_APPEND (binfo, access);
9841 if (VEC_space (tree, CLASSTYPE_VBASECLASSES (ref), 1))
9842 /* If we have space in the vbase vector, we must have shared at
9843 least one of them, and are therefore diamond shaped. */
9844 CLASSTYPE_DIAMOND_SHAPED_P (ref) = 1;
9846 /* Unmark all the types. */
9847 for (i = 0; BINFO_BASE_ITERATE (binfo, i, base_binfo); i++)
9848 TYPE_MARKED_P (BINFO_TYPE (base_binfo)) = 0;
9849 TYPE_MARKED_P (ref) = 0;
9851 /* Now see if we have a repeated base type. */
9852 if (!CLASSTYPE_REPEATED_BASE_P (ref))
9854 for (base_binfo = binfo; base_binfo;
9855 base_binfo = TREE_CHAIN (base_binfo))
9857 if (TYPE_MARKED_P (BINFO_TYPE (base_binfo)))
9859 CLASSTYPE_REPEATED_BASE_P (ref) = 1;
9862 TYPE_MARKED_P (BINFO_TYPE (base_binfo)) = 1;
9864 for (base_binfo = binfo; base_binfo;
9865 base_binfo = TREE_CHAIN (base_binfo))
9866 if (TYPE_MARKED_P (BINFO_TYPE (base_binfo)))
9867 TYPE_MARKED_P (BINFO_TYPE (base_binfo)) = 0;
9874 /* Begin compiling the definition of an enumeration type.
9876 Returns the type object, as yet incomplete.
9877 Also records info about it so that build_enumerator
9878 may be used to declare the individual values as they are read. */
9881 start_enum (tree name)
9885 gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE);
9887 /* If this is the real definition for a previous forward reference,
9888 fill in the contents in the same object that used to be the
9889 forward reference. */
9891 enumtype = lookup_and_check_tag (enum_type, name,
9892 /*tag_scope=*/ts_current,
9893 /*template_header_p=*/false);
9895 if (enumtype != NULL_TREE && TREE_CODE (enumtype) == ENUMERAL_TYPE)
9897 error ("multiple definition of %q#T", enumtype);
9898 error ("%Jprevious definition here", TYPE_MAIN_DECL (enumtype));
9899 /* Clear out TYPE_VALUES, and start again. */
9900 TYPE_VALUES (enumtype) = NULL_TREE;
9904 /* In case of error, make a dummy enum to allow parsing to
9906 if (enumtype == error_mark_node)
9907 name = make_anon_name ();
9909 enumtype = make_node (ENUMERAL_TYPE);
9910 enumtype = pushtag (name, enumtype, /*tag_scope=*/ts_current);
9916 /* After processing and defining all the values of an enumeration type,
9917 install their decls in the enumeration type and finish it off.
9918 ENUMTYPE is the type object and VALUES a list of name-value pairs. */
9921 finish_enum (tree enumtype)
9930 bool use_short_enum;
9934 integer_type_kind itk;
9935 tree underlying_type = NULL_TREE;
9937 /* We built up the VALUES in reverse order. */
9938 TYPE_VALUES (enumtype) = nreverse (TYPE_VALUES (enumtype));
9940 /* For an enum defined in a template, just set the type of the values;
9941 all further processing is postponed until the template is
9942 instantiated. We need to set the type so that tsubst of a CONST_DECL
9944 if (processing_template_decl)
9946 for (values = TYPE_VALUES (enumtype);
9948 values = TREE_CHAIN (values))
9949 TREE_TYPE (TREE_VALUE (values)) = enumtype;
9950 if (at_function_scope_p ())
9951 add_stmt (build_min (TAG_DEFN, enumtype));
9955 /* Determine the minimum and maximum values of the enumerators. */
9956 if (TYPE_VALUES (enumtype))
9958 minnode = maxnode = NULL_TREE;
9960 for (values = TYPE_VALUES (enumtype);
9962 values = TREE_CHAIN (values))
9964 decl = TREE_VALUE (values);
9966 /* [dcl.enum]: Following the closing brace of an enum-specifier,
9967 each enumerator has the type of its enumeration. Prior to the
9968 closing brace, the type of each enumerator is the type of its
9969 initializing value. */
9970 TREE_TYPE (decl) = enumtype;
9972 /* Update the minimum and maximum values, if appropriate. */
9973 value = DECL_INITIAL (decl);
9974 if (value == error_mark_node)
9975 value = integer_zero_node;
9976 /* Figure out what the minimum and maximum values of the
9979 minnode = maxnode = value;
9980 else if (tree_int_cst_lt (maxnode, value))
9982 else if (tree_int_cst_lt (value, minnode))
9989 If the enumerator-list is empty, the underlying type is as if
9990 the enumeration had a single enumerator with value 0. */
9991 minnode = maxnode = integer_zero_node;
9993 /* Compute the number of bits require to represent all values of the
9994 enumeration. We must do this before the type of MINNODE and
9995 MAXNODE are transformed, since min_precision relies on the
9996 TREE_TYPE of the value it is passed. */
9997 unsignedp = tree_int_cst_sgn (minnode) >= 0;
9998 lowprec = min_precision (minnode, unsignedp);
9999 highprec = min_precision (maxnode, unsignedp);
10000 precision = MAX (lowprec, highprec);
10002 /* Determine the underlying type of the enumeration.
10006 The underlying type of an enumeration is an integral type that
10007 can represent all the enumerator values defined in the
10008 enumeration. It is implementation-defined which integral type is
10009 used as the underlying type for an enumeration except that the
10010 underlying type shall not be larger than int unless the value of
10011 an enumerator cannot fit in an int or unsigned int.
10013 We use "int" or an "unsigned int" as the underlying type, even if
10014 a smaller integral type would work, unless the user has
10015 explicitly requested that we use the smallest possible type. The
10016 user can request that for all enumerations with a command line
10017 flag, or for just one enumeration with an attribute. */
10019 use_short_enum = flag_short_enums
10020 || lookup_attribute ("packed", TYPE_ATTRIBUTES (enumtype));
10022 for (itk = (use_short_enum ? itk_char : itk_int);
10026 underlying_type = integer_types[itk];
10027 if (TYPE_PRECISION (underlying_type) >= precision
10028 && TYPE_UNSIGNED (underlying_type) == unsignedp)
10031 if (itk == itk_none)
10035 IF no integral type can represent all the enumerator values, the
10036 enumeration is ill-formed. */
10037 error ("no integral type can represent all of the enumerator values "
10038 "for %qT", enumtype);
10039 precision = TYPE_PRECISION (long_long_integer_type_node);
10040 underlying_type = integer_types[itk_unsigned_long_long];
10043 /* Compute the minium and maximum values for the type.
10047 For an enumeration where emin is the smallest enumerator and emax
10048 is the largest, the values of the enumeration are the values of the
10049 underlying type in the range bmin to bmax, where bmin and bmax are,
10050 respectively, the smallest and largest values of the smallest bit-
10051 field that can store emin and emax. */
10053 /* The middle-end currently assumes that types with TYPE_PRECISION
10054 narrower than their underlying type are suitably zero or sign
10055 extended to fill their mode. g++ doesn't make these guarantees.
10056 Until the middle-end can represent such paradoxical types, we
10057 set the TYPE_PRECISION to the width of the underlying type. */
10058 TYPE_PRECISION (enumtype) = TYPE_PRECISION (underlying_type);
10060 set_min_and_max_values_for_integral_type (enumtype, precision, unsignedp);
10064 The value of sizeof() applied to an enumeration type, an object
10065 of an enumeration type, or an enumerator, is the value of sizeof()
10066 applied to the underlying type. */
10067 TYPE_SIZE (enumtype) = TYPE_SIZE (underlying_type);
10068 TYPE_SIZE_UNIT (enumtype) = TYPE_SIZE_UNIT (underlying_type);
10069 TYPE_MODE (enumtype) = TYPE_MODE (underlying_type);
10070 TYPE_ALIGN (enumtype) = TYPE_ALIGN (underlying_type);
10071 TYPE_USER_ALIGN (enumtype) = TYPE_USER_ALIGN (underlying_type);
10072 TYPE_UNSIGNED (enumtype) = TYPE_UNSIGNED (underlying_type);
10074 /* Convert each of the enumerators to the type of the underlying
10075 type of the enumeration. */
10076 for (values = TYPE_VALUES (enumtype); values; values = TREE_CHAIN (values))
10078 location_t saved_location;
10080 decl = TREE_VALUE (values);
10081 saved_location = input_location;
10082 input_location = DECL_SOURCE_LOCATION (decl);
10083 value = perform_implicit_conversion (underlying_type,
10084 DECL_INITIAL (decl));
10085 input_location = saved_location;
10087 /* Do not clobber shared ints. */
10088 value = copy_node (value);
10090 TREE_TYPE (value) = enumtype;
10091 DECL_INITIAL (decl) = value;
10092 TREE_VALUE (values) = value;
10095 /* Fix up all variant types of this enum type. */
10096 for (t = TYPE_MAIN_VARIANT (enumtype); t; t = TYPE_NEXT_VARIANT (t))
10098 TYPE_VALUES (t) = TYPE_VALUES (enumtype);
10099 TYPE_MIN_VALUE (t) = TYPE_MIN_VALUE (enumtype);
10100 TYPE_MAX_VALUE (t) = TYPE_MAX_VALUE (enumtype);
10101 TYPE_SIZE (t) = TYPE_SIZE (enumtype);
10102 TYPE_SIZE_UNIT (t) = TYPE_SIZE_UNIT (enumtype);
10103 TYPE_MODE (t) = TYPE_MODE (enumtype);
10104 TYPE_PRECISION (t) = TYPE_PRECISION (enumtype);
10105 TYPE_ALIGN (t) = TYPE_ALIGN (enumtype);
10106 TYPE_USER_ALIGN (t) = TYPE_USER_ALIGN (enumtype);
10107 TYPE_UNSIGNED (t) = TYPE_UNSIGNED (enumtype);
10110 /* Finish debugging output for this type. */
10111 rest_of_type_compilation (enumtype, namespace_bindings_p ());
10114 /* Build and install a CONST_DECL for an enumeration constant of the
10115 enumeration type ENUMTYPE whose NAME and VALUE (if any) are provided.
10116 Assignment of sequential values by default is handled here. */
10119 build_enumerator (tree name, tree value, tree enumtype)
10125 /* If the VALUE was erroneous, pretend it wasn't there; that will
10126 result in the enum being assigned the next value in sequence. */
10127 if (value == error_mark_node)
10130 /* Remove no-op casts from the value. */
10132 STRIP_TYPE_NOPS (value);
10134 if (! processing_template_decl)
10136 /* Validate and default VALUE. */
10137 if (value != NULL_TREE)
10139 value = integral_constant_value (value);
10141 if (TREE_CODE (value) == INTEGER_CST)
10143 value = perform_integral_promotions (value);
10144 constant_expression_warning (value);
10148 error ("enumerator value for %qD not integer constant", name);
10153 /* Default based on previous value. */
10154 if (value == NULL_TREE)
10156 if (TYPE_VALUES (enumtype))
10159 unsigned HOST_WIDE_INT lo;
10163 /* The next value is the previous value plus one. We can
10164 safely assume that the previous value is an INTEGER_CST.
10165 add_double doesn't know the type of the target expression,
10166 so we must check with int_fits_type_p as well. */
10167 prev_value = DECL_INITIAL (TREE_VALUE (TYPE_VALUES (enumtype)));
10168 overflowed = add_double (TREE_INT_CST_LOW (prev_value),
10169 TREE_INT_CST_HIGH (prev_value),
10171 value = build_int_cst_wide (TREE_TYPE (prev_value), lo, hi);
10172 overflowed |= !int_fits_type_p (value, TREE_TYPE (prev_value));
10176 error ("overflow in enumeration values at %qD", name);
10177 value = error_mark_node;
10181 value = integer_zero_node;
10184 /* Remove no-op casts from the value. */
10185 STRIP_TYPE_NOPS (value);
10188 /* C++ associates enums with global, function, or class declarations. */
10189 context = current_scope ();
10191 /* Build the actual enumeration constant. Note that the enumeration
10192 constants have the type of their initializers until the
10193 enumeration is complete:
10197 Following the closing brace of an enum-specifier, each enumer-
10198 ator has the type of its enumeration. Prior to the closing
10199 brace, the type of each enumerator is the type of its
10200 initializing value.
10202 In finish_enum we will reset the type. Of course, if we're
10203 processing a template, there may be no value. */
10204 type = value ? TREE_TYPE (value) : NULL_TREE;
10206 if (context && context == current_class_type)
10207 /* This enum declaration is local to the class. We need the full
10208 lang_decl so that we can record DECL_CLASS_CONTEXT, for example. */
10209 decl = build_lang_decl (CONST_DECL, name, type);
10211 /* It's a global enum, or it's local to a function. (Note local to
10212 a function could mean local to a class method. */
10213 decl = build_decl (CONST_DECL, name, type);
10215 DECL_CONTEXT (decl) = FROB_CONTEXT (context);
10216 TREE_CONSTANT (decl) = 1;
10217 TREE_INVARIANT (decl) = 1;
10218 TREE_READONLY (decl) = 1;
10219 DECL_INITIAL (decl) = value;
10221 if (context && context == current_class_type)
10222 /* In something like `struct S { enum E { i = 7 }; };' we put `i'
10223 on the TYPE_FIELDS list for `S'. (That's so that you can say
10224 things like `S::i' later.) */
10225 finish_member_declaration (decl);
10229 /* Add this enumeration constant to the list for this type. */
10230 TYPE_VALUES (enumtype) = tree_cons (name, decl, TYPE_VALUES (enumtype));
10234 /* We're defining DECL. Make sure that it's type is OK. */
10237 check_function_type (tree decl, tree current_function_parms)
10239 tree fntype = TREE_TYPE (decl);
10240 tree return_type = complete_type (TREE_TYPE (fntype));
10242 /* In a function definition, arg types must be complete. */
10243 require_complete_types_for_parms (current_function_parms);
10245 if (dependent_type_p (return_type))
10247 if (!COMPLETE_OR_VOID_TYPE_P (return_type))
10249 tree args = TYPE_ARG_TYPES (fntype);
10251 error ("return type %q#T is incomplete", return_type);
10253 /* Make it return void instead. */
10254 if (TREE_CODE (fntype) == METHOD_TYPE)
10255 fntype = build_method_type_directly (TREE_TYPE (TREE_VALUE (args)),
10257 TREE_CHAIN (args));
10259 fntype = build_function_type (void_type_node, args);
10261 = build_exception_variant (fntype,
10262 TYPE_RAISES_EXCEPTIONS (TREE_TYPE (decl)));
10265 abstract_virtuals_error (decl, TREE_TYPE (fntype));
10268 /* Create the FUNCTION_DECL for a function definition.
10269 DECLSPECS and DECLARATOR are the parts of the declaration;
10270 they describe the function's name and the type it returns,
10271 but twisted together in a fashion that parallels the syntax of C.
10273 FLAGS is a bitwise or of SF_PRE_PARSED (indicating that the
10274 DECLARATOR is really the DECL for the function we are about to
10275 process and that DECLSPECS should be ignored), SF_INCLASS_INLINE
10276 indicating that the function is an inline defined in-class.
10278 This function creates a binding context for the function body
10279 as well as setting up the FUNCTION_DECL in current_function_decl.
10281 For C++, we must first check whether that datum makes any sense.
10282 For example, "class A local_a(1,2);" means that variable local_a
10283 is an aggregate of type A, which should have a constructor
10284 applied to it with the argument list [1, 2]. */
10287 start_preparsed_function (tree decl1, tree attrs, int flags)
10289 tree ctype = NULL_TREE;
10292 int doing_friend = 0;
10293 struct cp_binding_level *bl;
10294 tree current_function_parms;
10295 struct c_fileinfo *finfo
10296 = get_fileinfo (lbasename (LOCATION_FILE (DECL_SOURCE_LOCATION (decl1))));
10297 bool honor_interface;
10299 /* Sanity check. */
10300 gcc_assert (TREE_CODE (TREE_VALUE (void_list_node)) == VOID_TYPE);
10301 gcc_assert (TREE_CHAIN (void_list_node) == NULL_TREE);
10303 fntype = TREE_TYPE (decl1);
10304 if (TREE_CODE (fntype) == METHOD_TYPE)
10305 ctype = TYPE_METHOD_BASETYPE (fntype);
10307 /* ISO C++ 11.4/5. A friend function defined in a class is in
10308 the (lexical) scope of the class in which it is defined. */
10309 if (!ctype && DECL_FRIEND_P (decl1))
10311 ctype = DECL_FRIEND_CONTEXT (decl1);
10313 /* CTYPE could be null here if we're dealing with a template;
10314 for example, `inline friend float foo()' inside a template
10315 will have no CTYPE set. */
10316 if (ctype && TREE_CODE (ctype) != RECORD_TYPE)
10322 if (DECL_DECLARED_INLINE_P (decl1)
10323 && lookup_attribute ("noinline", attrs))
10324 warning (0, "inline function %q+D given attribute noinline", decl1);
10326 if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (decl1))
10327 /* This is a constructor, we must ensure that any default args
10328 introduced by this definition are propagated to the clones
10329 now. The clones are used directly in overload resolution. */
10330 adjust_clone_args (decl1);
10332 /* Sometimes we don't notice that a function is a static member, and
10333 build a METHOD_TYPE for it. Fix that up now. */
10334 if (ctype != NULL_TREE && DECL_STATIC_FUNCTION_P (decl1)
10335 && TREE_CODE (TREE_TYPE (decl1)) == METHOD_TYPE)
10337 revert_static_member_fn (decl1);
10341 /* Set up current_class_type, and enter the scope of the class, if
10344 push_nested_class (ctype);
10345 else if (DECL_STATIC_FUNCTION_P (decl1))
10346 push_nested_class (DECL_CONTEXT (decl1));
10348 /* Now that we have entered the scope of the class, we must restore
10349 the bindings for any template parameters surrounding DECL1, if it
10350 is an inline member template. (Order is important; consider the
10351 case where a template parameter has the same name as a field of
10352 the class.) It is not until after this point that
10353 PROCESSING_TEMPLATE_DECL is guaranteed to be set up correctly. */
10354 if (flags & SF_INCLASS_INLINE)
10355 maybe_begin_member_template_processing (decl1);
10357 /* Effective C++ rule 15. */
10359 && DECL_OVERLOADED_OPERATOR_P (decl1) == NOP_EXPR
10360 && TREE_CODE (TREE_TYPE (fntype)) == VOID_TYPE)
10361 warning (OPT_Weffc__, "%<operator=%> should return a reference to %<*this%>");
10363 /* Make the init_value nonzero so pushdecl knows this is not tentative.
10364 error_mark_node is replaced below (in poplevel) with the BLOCK. */
10365 if (!DECL_INITIAL (decl1))
10366 DECL_INITIAL (decl1) = error_mark_node;
10368 /* This function exists in static storage.
10369 (This does not mean `static' in the C sense!) */
10370 TREE_STATIC (decl1) = 1;
10372 /* We must call push_template_decl after current_class_type is set
10373 up. (If we are processing inline definitions after exiting a
10374 class scope, current_class_type will be NULL_TREE until set above
10375 by push_nested_class.) */
10376 if (processing_template_decl)
10378 /* FIXME: Handle error_mark_node more gracefully. */
10379 tree newdecl1 = push_template_decl (decl1);
10380 if (newdecl1 != error_mark_node)
10384 /* We are now in the scope of the function being defined. */
10385 current_function_decl = decl1;
10387 /* Save the parm names or decls from this function's declarator
10388 where store_parm_decls will find them. */
10389 current_function_parms = DECL_ARGUMENTS (decl1);
10391 /* Make sure the parameter and return types are reasonable. When
10392 you declare a function, these types can be incomplete, but they
10393 must be complete when you define the function. */
10394 check_function_type (decl1, current_function_parms);
10395 /* Make sure no default arg is missing. */
10396 check_default_args (decl1);
10398 /* Build the return declaration for the function. */
10399 restype = TREE_TYPE (fntype);
10400 /* Promote the value to int before returning it. */
10401 if (c_promoting_integer_type_p (restype))
10402 restype = type_promotes_to (restype);
10403 if (DECL_RESULT (decl1) == NULL_TREE)
10407 resdecl = build_decl (RESULT_DECL, 0, TYPE_MAIN_VARIANT (restype));
10408 DECL_ARTIFICIAL (resdecl) = 1;
10409 DECL_IGNORED_P (resdecl) = 1;
10410 DECL_RESULT (decl1) = resdecl;
10412 cp_apply_type_quals_to_decl (cp_type_quals (restype), resdecl);
10415 /* Initialize RTL machinery. We cannot do this until
10416 CURRENT_FUNCTION_DECL and DECL_RESULT are set up. We do this
10417 even when processing a template; this is how we get
10418 CFUN set up, and our per-function variables initialized.
10419 FIXME factor out the non-RTL stuff. */
10420 bl = current_binding_level;
10421 allocate_struct_function (decl1);
10422 current_binding_level = bl;
10424 /* Even though we're inside a function body, we still don't want to
10425 call expand_expr to calculate the size of a variable-sized array.
10426 We haven't necessarily assigned RTL to all variables yet, so it's
10427 not safe to try to expand expressions involving them. */
10428 cfun->x_dont_save_pending_sizes_p = 1;
10430 /* Start the statement-tree, start the tree now. */
10431 DECL_SAVED_TREE (decl1) = push_stmt_list ();
10433 /* Let the user know we're compiling this function. */
10434 announce_function (decl1);
10436 /* Record the decl so that the function name is defined.
10437 If we already have a decl for this name, and it is a FUNCTION_DECL,
10438 use the old decl. */
10439 if (!processing_template_decl && !(flags & SF_PRE_PARSED))
10441 /* A specialization is not used to guide overload resolution. */
10442 if (!DECL_FUNCTION_MEMBER_P (decl1)
10443 && !(DECL_USE_TEMPLATE (decl1) &&
10444 PRIMARY_TEMPLATE_P (DECL_TI_TEMPLATE (decl1))))
10446 tree olddecl = pushdecl (decl1);
10448 if (olddecl == error_mark_node)
10449 /* If something went wrong when registering the declaration,
10450 use DECL1; we have to have a FUNCTION_DECL to use when
10451 parsing the body of the function. */
10454 /* Otherwise, OLDDECL is either a previous declaration of
10455 the same function or DECL1 itself. */
10460 /* We need to set the DECL_CONTEXT. */
10461 if (!DECL_CONTEXT (decl1) && DECL_TEMPLATE_INFO (decl1))
10462 DECL_CONTEXT (decl1) = DECL_CONTEXT (DECL_TI_TEMPLATE (decl1));
10464 fntype = TREE_TYPE (decl1);
10466 /* If #pragma weak applies, mark the decl appropriately now.
10467 The pragma only applies to global functions. Because
10468 determining whether or not the #pragma applies involves
10469 computing the mangled name for the declaration, we cannot
10470 apply the pragma until after we have merged this declaration
10471 with any previous declarations; if the original declaration
10472 has a linkage specification, that specification applies to
10473 the definition as well, and may affect the mangled name. */
10474 if (!DECL_CONTEXT (decl1))
10475 maybe_apply_pragma_weak (decl1);
10478 /* Reset these in case the call to pushdecl changed them. */
10479 current_function_decl = decl1;
10480 cfun->decl = decl1;
10482 /* If we are (erroneously) defining a function that we have already
10483 defined before, wipe out what we knew before. */
10484 if (!DECL_PENDING_INLINE_P (decl1))
10485 DECL_SAVED_FUNCTION_DATA (decl1) = NULL;
10487 if (ctype && !doing_friend && !DECL_STATIC_FUNCTION_P (decl1))
10489 /* We know that this was set up by `grokclassfn'. We do not
10490 wait until `store_parm_decls', since evil parse errors may
10491 never get us to that point. Here we keep the consistency
10492 between `current_class_type' and `current_class_ptr'. */
10493 tree t = DECL_ARGUMENTS (decl1);
10495 gcc_assert (t != NULL_TREE && TREE_CODE (t) == PARM_DECL);
10496 gcc_assert (TREE_CODE (TREE_TYPE (t)) == POINTER_TYPE);
10498 cp_function_chain->x_current_class_ref
10499 = build_indirect_ref (t, NULL);
10500 cp_function_chain->x_current_class_ptr = t;
10502 /* Constructors and destructors need to know whether they're "in
10503 charge" of initializing virtual base classes. */
10504 t = TREE_CHAIN (t);
10505 if (DECL_HAS_IN_CHARGE_PARM_P (decl1))
10507 current_in_charge_parm = t;
10508 t = TREE_CHAIN (t);
10510 if (DECL_HAS_VTT_PARM_P (decl1))
10512 gcc_assert (DECL_NAME (t) == vtt_parm_identifier);
10513 current_vtt_parm = t;
10517 honor_interface = (!DECL_TEMPLATE_INSTANTIATION (decl1)
10518 /* Implicitly-defined methods (like the
10519 destructor for a class in which no destructor
10520 is explicitly declared) must not be defined
10521 until their definition is needed. So, we
10522 ignore interface specifications for
10523 compiler-generated functions. */
10524 && !DECL_ARTIFICIAL (decl1));
10526 if (DECL_INTERFACE_KNOWN (decl1))
10528 tree ctx = decl_function_context (decl1);
10530 if (DECL_NOT_REALLY_EXTERN (decl1))
10531 DECL_EXTERNAL (decl1) = 0;
10533 if (ctx != NULL_TREE && DECL_DECLARED_INLINE_P (ctx)
10534 && TREE_PUBLIC (ctx))
10535 /* This is a function in a local class in an extern inline
10537 comdat_linkage (decl1);
10539 /* If this function belongs to an interface, it is public.
10540 If it belongs to someone else's interface, it is also external.
10541 This only affects inlines and template instantiations. */
10542 else if (!finfo->interface_unknown && honor_interface)
10544 if (DECL_DECLARED_INLINE_P (decl1)
10545 || DECL_TEMPLATE_INSTANTIATION (decl1)
10546 || processing_template_decl)
10548 DECL_EXTERNAL (decl1)
10549 = (finfo->interface_only
10550 || (DECL_DECLARED_INLINE_P (decl1)
10551 && ! flag_implement_inlines
10552 && !DECL_VINDEX (decl1)));
10554 /* For WIN32 we also want to put these in linkonce sections. */
10555 maybe_make_one_only (decl1);
10558 DECL_EXTERNAL (decl1) = 0;
10559 DECL_INTERFACE_KNOWN (decl1) = 1;
10560 /* If this function is in an interface implemented in this file,
10561 make sure that the backend knows to emit this function
10563 if (!DECL_EXTERNAL (decl1))
10564 mark_needed (decl1);
10566 else if (finfo->interface_unknown && finfo->interface_only
10567 && honor_interface)
10569 /* If MULTIPLE_SYMBOL_SPACES is defined and we saw a #pragma
10570 interface, we will have both finfo->interface_unknown and
10571 finfo->interface_only set. In that case, we don't want to
10572 use the normal heuristics because someone will supply a
10573 #pragma implementation elsewhere, and deducing it here would
10574 produce a conflict. */
10575 comdat_linkage (decl1);
10576 DECL_EXTERNAL (decl1) = 0;
10577 DECL_INTERFACE_KNOWN (decl1) = 1;
10578 DECL_DEFER_OUTPUT (decl1) = 1;
10582 /* This is a definition, not a reference.
10583 So clear DECL_EXTERNAL. */
10584 DECL_EXTERNAL (decl1) = 0;
10586 if ((DECL_DECLARED_INLINE_P (decl1)
10587 || DECL_TEMPLATE_INSTANTIATION (decl1))
10588 && ! DECL_INTERFACE_KNOWN (decl1)
10589 /* Don't try to defer nested functions for now. */
10590 && ! decl_function_context (decl1))
10591 DECL_DEFER_OUTPUT (decl1) = 1;
10593 DECL_INTERFACE_KNOWN (decl1) = 1;
10596 /* Determine the ELF visibility attribute for the function. We must not
10597 do this before calling "pushdecl", as we must allow "duplicate_decls"
10598 to merge any attributes appropriately. We also need to wait until
10600 if (!DECL_CLONED_FUNCTION_P (decl1))
10601 determine_visibility (decl1);
10603 begin_scope (sk_function_parms, decl1);
10607 if (DECL_DESTRUCTOR_P (decl1)
10608 || (DECL_CONSTRUCTOR_P (decl1)
10609 && targetm.cxx.cdtor_returns_this ()))
10611 cdtor_label = build_decl (LABEL_DECL, NULL_TREE, NULL_TREE);
10612 DECL_CONTEXT (cdtor_label) = current_function_decl;
10615 start_fname_decls ();
10617 store_parm_decls (current_function_parms);
10621 /* Like start_preparsed_function, except that instead of a
10622 FUNCTION_DECL, this function takes DECLSPECS and DECLARATOR.
10624 Returns 1 on success. If the DECLARATOR is not suitable for a function
10625 (it defines a datum instead), we return 0, which tells
10626 yyparse to report a parse error. */
10629 start_function (cp_decl_specifier_seq *declspecs,
10630 const cp_declarator *declarator,
10635 decl1 = grokdeclarator (declarator, declspecs, FUNCDEF, 1, &attrs);
10636 /* If the declarator is not suitable for a function definition,
10637 cause a syntax error. */
10638 if (decl1 == NULL_TREE || TREE_CODE (decl1) != FUNCTION_DECL)
10641 if (DECL_MAIN_P (decl1))
10642 /* main must return int. grokfndecl should have corrected it
10643 (and issued a diagnostic) if the user got it wrong. */
10644 gcc_assert (same_type_p (TREE_TYPE (TREE_TYPE (decl1)),
10645 integer_type_node));
10647 start_preparsed_function (decl1, attrs, /*flags=*/SF_DEFAULT);
10652 /* Returns true iff an EH_SPEC_BLOCK should be created in the body of
10656 use_eh_spec_block (tree fn)
10658 return (flag_exceptions && flag_enforce_eh_specs
10659 && !processing_template_decl
10660 && TYPE_RAISES_EXCEPTIONS (TREE_TYPE (fn))
10661 /* We insert the EH_SPEC_BLOCK only in the original
10662 function; then, it is copied automatically to the
10664 && !DECL_CLONED_FUNCTION_P (fn)
10665 /* Implicitly-generated constructors and destructors have
10666 exception specifications. However, those specifications
10667 are the union of the possible exceptions specified by the
10668 constructors/destructors for bases and members, so no
10669 unallowed exception will ever reach this function. By
10670 not creating the EH_SPEC_BLOCK we save a little memory,
10671 and we avoid spurious warnings about unreachable
10673 && !DECL_ARTIFICIAL (fn));
10676 /* Store the parameter declarations into the current function declaration.
10677 This is called after parsing the parameter declarations, before
10678 digesting the body of the function.
10680 Also install to binding contour return value identifier, if any. */
10683 store_parm_decls (tree current_function_parms)
10685 tree fndecl = current_function_decl;
10688 /* This is a chain of any other decls that came in among the parm
10689 declarations. If a parm is declared with enum {foo, bar} x;
10690 then CONST_DECLs for foo and bar are put here. */
10691 tree nonparms = NULL_TREE;
10693 if (current_function_parms)
10695 /* This case is when the function was defined with an ANSI prototype.
10696 The parms already have decls, so we need not do anything here
10697 except record them as in effect
10698 and complain if any redundant old-style parm decls were written. */
10700 tree specparms = current_function_parms;
10703 /* Must clear this because it might contain TYPE_DECLs declared
10705 current_binding_level->names = NULL;
10707 /* If we're doing semantic analysis, then we'll call pushdecl
10708 for each of these. We must do them in reverse order so that
10709 they end in the correct forward order. */
10710 specparms = nreverse (specparms);
10712 for (parm = specparms; parm; parm = next)
10714 next = TREE_CHAIN (parm);
10715 if (TREE_CODE (parm) == PARM_DECL)
10717 if (DECL_NAME (parm) == NULL_TREE
10718 || TREE_CODE (parm) != VOID_TYPE)
10721 error ("parameter %qD declared void", parm);
10725 /* If we find an enum constant or a type tag,
10726 put it aside for the moment. */
10727 TREE_CHAIN (parm) = NULL_TREE;
10728 nonparms = chainon (nonparms, parm);
10732 /* Get the decls in their original chain order and record in the
10733 function. This is all and only the PARM_DECLs that were
10734 pushed into scope by the loop above. */
10735 DECL_ARGUMENTS (fndecl) = getdecls ();
10738 DECL_ARGUMENTS (fndecl) = NULL_TREE;
10740 /* Now store the final chain of decls for the arguments
10741 as the decl-chain of the current lexical scope.
10742 Put the enumerators in as well, at the front so that
10743 DECL_ARGUMENTS is not modified. */
10744 current_binding_level->names = chainon (nonparms, DECL_ARGUMENTS (fndecl));
10746 if (use_eh_spec_block (current_function_decl))
10747 current_eh_spec_block = begin_eh_spec_block ();
10751 /* We have finished doing semantic analysis on DECL, but have not yet
10752 generated RTL for its body. Save away our current state, so that
10753 when we want to generate RTL later we know what to do. */
10756 save_function_data (tree decl)
10758 struct language_function *f;
10760 /* Save the language-specific per-function data so that we can
10761 get it back when we really expand this function. */
10762 gcc_assert (!DECL_PENDING_INLINE_P (decl));
10765 f = GGC_NEW (struct language_function);
10766 memcpy (f, cp_function_chain, sizeof (struct language_function));
10767 DECL_SAVED_FUNCTION_DATA (decl) = f;
10769 /* Clear out the bits we don't need. */
10770 f->base.x_stmt_tree.x_cur_stmt_list = NULL_TREE;
10771 f->bindings = NULL;
10772 f->x_local_names = NULL;
10776 /* Set the return value of the constructor (if present). */
10779 finish_constructor_body (void)
10784 if (targetm.cxx.cdtor_returns_this ())
10786 /* Any return from a constructor will end up here. */
10787 add_stmt (build_stmt (LABEL_EXPR, cdtor_label));
10789 val = DECL_ARGUMENTS (current_function_decl);
10790 val = build2 (MODIFY_EXPR, TREE_TYPE (val),
10791 DECL_RESULT (current_function_decl), val);
10792 /* Return the address of the object. */
10793 exprstmt = build_stmt (RETURN_EXPR, val);
10794 add_stmt (exprstmt);
10798 /* Do all the processing for the beginning of a destructor; set up the
10799 vtable pointers and cleanups for bases and members. */
10802 begin_destructor_body (void)
10804 tree compound_stmt;
10806 /* If the CURRENT_CLASS_TYPE is incomplete, we will have already
10807 issued an error message. We still want to try to process the
10808 body of the function, but initialize_vtbl_ptrs will crash if
10809 TYPE_BINFO is NULL. */
10810 if (COMPLETE_TYPE_P (current_class_type))
10812 compound_stmt = begin_compound_stmt (0);
10813 /* Make all virtual function table pointers in non-virtual base
10814 classes point to CURRENT_CLASS_TYPE's virtual function
10816 initialize_vtbl_ptrs (current_class_ptr);
10817 finish_compound_stmt (compound_stmt);
10819 /* And insert cleanups for our bases and members so that they
10820 will be properly destroyed if we throw. */
10821 push_base_cleanups ();
10825 /* At the end of every destructor we generate code to delete the object if
10826 necessary. Do that now. */
10829 finish_destructor_body (void)
10833 /* Any return from a destructor will end up here; that way all base
10834 and member cleanups will be run when the function returns. */
10835 add_stmt (build_stmt (LABEL_EXPR, cdtor_label));
10837 /* In a virtual destructor, we must call delete. */
10838 if (DECL_VIRTUAL_P (current_function_decl))
10841 tree virtual_size = cxx_sizeof (current_class_type);
10845 At the point of definition of a virtual destructor (including
10846 an implicit definition), non-placement operator delete shall
10847 be looked up in the scope of the destructor's class and if
10848 found shall be accessible and unambiguous. */
10849 exprstmt = build_op_delete_call(DELETE_EXPR, current_class_ptr,
10851 /*global_p=*/false,
10852 /*placement=*/NULL_TREE,
10853 /*alloc_fn=*/NULL_TREE);
10855 if_stmt = begin_if_stmt ();
10856 finish_if_stmt_cond (build2 (BIT_AND_EXPR, integer_type_node,
10857 current_in_charge_parm,
10860 finish_expr_stmt (exprstmt);
10861 finish_then_clause (if_stmt);
10862 finish_if_stmt (if_stmt);
10865 if (targetm.cxx.cdtor_returns_this ())
10869 val = DECL_ARGUMENTS (current_function_decl);
10870 val = build2 (MODIFY_EXPR, TREE_TYPE (val),
10871 DECL_RESULT (current_function_decl), val);
10872 /* Return the address of the object. */
10873 exprstmt = build_stmt (RETURN_EXPR, val);
10874 add_stmt (exprstmt);
10878 /* Do the necessary processing for the beginning of a function body, which
10879 in this case includes member-initializers, but not the catch clauses of
10880 a function-try-block. Currently, this means opening a binding level
10881 for the member-initializers (in a ctor) and member cleanups (in a dtor). */
10884 begin_function_body (void)
10888 if (! FUNCTION_NEEDS_BODY_BLOCK (current_function_decl))
10891 if (processing_template_decl)
10892 /* Do nothing now. */;
10894 /* Always keep the BLOCK node associated with the outermost pair of
10895 curly braces of a function. These are needed for correct
10896 operation of dwarfout.c. */
10897 keep_next_level (true);
10899 stmt = begin_compound_stmt (BCS_FN_BODY);
10901 if (processing_template_decl)
10902 /* Do nothing now. */;
10903 else if (DECL_DESTRUCTOR_P (current_function_decl))
10904 begin_destructor_body ();
10909 /* Do the processing for the end of a function body. Currently, this means
10910 closing out the cleanups for fully-constructed bases and members, and in
10911 the case of the destructor, deleting the object if desired. Again, this
10912 is only meaningful for [cd]tors, since they are the only functions where
10913 there is a significant distinction between the main body and any
10914 function catch clauses. Handling, say, main() return semantics here
10915 would be wrong, as flowing off the end of a function catch clause for
10916 main() would also need to return 0. */
10919 finish_function_body (tree compstmt)
10921 if (compstmt == NULL_TREE)
10924 /* Close the block. */
10925 finish_compound_stmt (compstmt);
10927 if (processing_template_decl)
10928 /* Do nothing now. */;
10929 else if (DECL_CONSTRUCTOR_P (current_function_decl))
10930 finish_constructor_body ();
10931 else if (DECL_DESTRUCTOR_P (current_function_decl))
10932 finish_destructor_body ();
10935 /* Given a function, returns the BLOCK corresponding to the outermost level
10936 of curly braces, skipping the artificial block created for constructor
10940 outer_curly_brace_block (tree fndecl)
10942 tree block = BLOCK_SUBBLOCKS (DECL_INITIAL (fndecl));
10943 if (FUNCTION_NEEDS_BODY_BLOCK (current_function_decl))
10944 /* Skip the artificial function body block. */
10945 block = BLOCK_SUBBLOCKS (block);
10949 /* Finish up a function declaration and compile that function
10950 all the way to assembler language output. The free the storage
10951 for the function definition.
10953 FLAGS is a bitwise or of the following values:
10955 We just finished processing the body of an in-class inline
10956 function definition. (This processing will have taken place
10957 after the class definition is complete.) */
10960 finish_function (int flags)
10962 tree fndecl = current_function_decl;
10963 tree fntype, ctype = NULL_TREE;
10964 int inclass_inline = (flags & 2) != 0;
10967 /* When we get some parse errors, we can end up without a
10968 current_function_decl, so cope. */
10969 if (fndecl == NULL_TREE)
10970 return error_mark_node;
10972 if (DECL_NONSTATIC_MEMBER_FUNCTION_P (fndecl)
10973 && DECL_VIRTUAL_P (fndecl)
10974 && !processing_template_decl)
10976 tree fnclass = DECL_CONTEXT (fndecl);
10977 if (fndecl == CLASSTYPE_KEY_METHOD (fnclass))
10978 keyed_classes = tree_cons (NULL_TREE, fnclass, keyed_classes);
10981 nested = function_depth > 1;
10982 fntype = TREE_TYPE (fndecl);
10984 /* TREE_READONLY (fndecl) = 1;
10985 This caused &foo to be of type ptr-to-const-function
10986 which then got a warning when stored in a ptr-to-function variable. */
10988 gcc_assert (building_stmt_tree ());
10990 /* For a cloned function, we've already got all the code we need;
10991 there's no need to add any extra bits. */
10992 if (!DECL_CLONED_FUNCTION_P (fndecl))
10994 if (DECL_MAIN_P (current_function_decl))
10998 /* Make it so that `main' always returns 0 by default (or
11001 stmt = finish_return_stmt (integer_one_node);
11003 stmt = finish_return_stmt (integer_zero_node);
11005 /* Hack. We don't want the middle-end to warn that this
11006 return is unreachable, so put the statement on the
11008 #ifdef USE_MAPPED_LOCATION
11009 SET_EXPR_LOCATION (stmt, UNKNOWN_LOCATION);
11011 annotate_with_file_line (stmt, input_filename, 0);
11015 if (use_eh_spec_block (current_function_decl))
11016 finish_eh_spec_block (TYPE_RAISES_EXCEPTIONS
11017 (TREE_TYPE (current_function_decl)),
11018 current_eh_spec_block);
11021 /* If we're saving up tree structure, tie off the function now. */
11022 DECL_SAVED_TREE (fndecl) = pop_stmt_list (DECL_SAVED_TREE (fndecl));
11024 finish_fname_decls ();
11026 /* If this function can't throw any exceptions, remember that. */
11027 if (!processing_template_decl
11028 && !cp_function_chain->can_throw
11029 && !flag_non_call_exceptions)
11030 TREE_NOTHROW (fndecl) = 1;
11032 /* This must come after expand_function_end because cleanups might
11033 have declarations (from inline functions) that need to go into
11034 this function's blocks. */
11036 /* If the current binding level isn't the outermost binding level
11037 for this function, either there is a bug, or we have experienced
11038 syntax errors and the statement tree is malformed. */
11039 if (current_binding_level->kind != sk_function_parms)
11041 /* Make sure we have already experienced errors. */
11042 gcc_assert (errorcount);
11044 /* Throw away the broken statement tree and extra binding
11046 DECL_SAVED_TREE (fndecl) = alloc_stmt_list ();
11048 while (current_binding_level->kind != sk_function_parms)
11050 if (current_binding_level->kind == sk_class)
11051 pop_nested_class ();
11053 poplevel (0, 0, 0);
11056 poplevel (1, 0, 1);
11058 /* Statements should always be full-expressions at the outermost set
11059 of curly braces for a function. */
11060 gcc_assert (stmts_are_full_exprs_p ());
11062 /* Set up the named return value optimization, if we can. Candidate
11063 variables are selected in check_return_value. */
11064 if (current_function_return_value)
11066 tree r = current_function_return_value;
11069 if (r != error_mark_node
11070 /* This is only worth doing for fns that return in memory--and
11071 simpler, since we don't have to worry about promoted modes. */
11072 && aggregate_value_p (TREE_TYPE (TREE_TYPE (fndecl)), fndecl)
11073 /* Only allow this for variables declared in the outer scope of
11074 the function so we know that their lifetime always ends with a
11075 return; see g++.dg/opt/nrv6.C. We could be more flexible if
11076 we were to do this optimization in tree-ssa. */
11077 && (outer = outer_curly_brace_block (fndecl))
11078 && chain_member (r, BLOCK_VARS (outer)))
11079 finalize_nrv (&DECL_SAVED_TREE (fndecl), r, DECL_RESULT (fndecl));
11081 current_function_return_value = NULL_TREE;
11084 /* Remember that we were in class scope. */
11085 if (current_class_name)
11086 ctype = current_class_type;
11088 /* Must mark the RESULT_DECL as being in this function. */
11089 DECL_CONTEXT (DECL_RESULT (fndecl)) = fndecl;
11091 /* Set the BLOCK_SUPERCONTEXT of the outermost function scope to point
11092 to the FUNCTION_DECL node itself. */
11093 BLOCK_SUPERCONTEXT (DECL_INITIAL (fndecl)) = fndecl;
11095 /* Save away current state, if appropriate. */
11096 if (!processing_template_decl)
11097 save_function_data (fndecl);
11099 /* Complain if there's just no return statement. */
11100 if (warn_return_type
11101 && TREE_CODE (TREE_TYPE (fntype)) != VOID_TYPE
11102 && !dependent_type_p (TREE_TYPE (fntype))
11103 && !current_function_returns_value && !current_function_returns_null
11104 /* Don't complain if we abort or throw. */
11105 && !current_function_returns_abnormally
11106 && !DECL_NAME (DECL_RESULT (fndecl))
11107 /* Normally, with -Wreturn-type, flow will complain. Unless we're an
11108 inline function, as we might never be compiled separately. */
11109 && (DECL_INLINE (fndecl) || processing_template_decl)
11110 /* Structor return values (if any) are set by the compiler. */
11111 && !DECL_CONSTRUCTOR_P (fndecl)
11112 && !DECL_DESTRUCTOR_P (fndecl))
11113 warning (OPT_Wreturn_type, "no return statement in function returning non-void");
11115 /* Store the end of the function, so that we get good line number
11116 info for the epilogue. */
11117 cfun->function_end_locus = input_location;
11119 /* Genericize before inlining. */
11120 if (!processing_template_decl)
11122 struct language_function *f = DECL_SAVED_FUNCTION_DATA (fndecl);
11123 cp_genericize (fndecl);
11124 /* Clear out the bits we don't need. */
11125 f->x_current_class_ptr = NULL;
11126 f->x_current_class_ref = NULL;
11127 f->x_eh_spec_block = NULL;
11128 f->x_in_charge_parm = NULL;
11129 f->x_vtt_parm = NULL;
11130 f->x_return_value = NULL;
11131 f->bindings = NULL;
11132 f->extern_decl_map = NULL;
11134 /* Handle attribute((warn_unused_result)). Relies on gimple input. */
11135 c_warn_unused_result (&DECL_SAVED_TREE (fndecl));
11137 /* Clear out the bits we don't need. */
11138 local_names = NULL;
11140 /* We're leaving the context of this function, so zap cfun. It's still in
11141 DECL_STRUCT_FUNCTION, and we'll restore it in tree_rest_of_compilation. */
11143 current_function_decl = NULL;
11145 /* If this is an in-class inline definition, we may have to pop the
11146 bindings for the template parameters that we added in
11147 maybe_begin_member_template_processing when start_function was
11149 if (inclass_inline)
11150 maybe_end_member_template_processing ();
11152 /* Leave the scope of the class. */
11154 pop_nested_class ();
11160 /* Let the error reporting routines know that we're outside a
11161 function. For a nested function, this value is used in
11162 cxx_pop_function_context and then reset via pop_function_context. */
11163 current_function_decl = NULL_TREE;
11168 /* Create the FUNCTION_DECL for a function definition.
11169 DECLSPECS and DECLARATOR are the parts of the declaration;
11170 they describe the return type and the name of the function,
11171 but twisted together in a fashion that parallels the syntax of C.
11173 This function creates a binding context for the function body
11174 as well as setting up the FUNCTION_DECL in current_function_decl.
11176 Returns a FUNCTION_DECL on success.
11178 If the DECLARATOR is not suitable for a function (it defines a datum
11179 instead), we return 0, which tells yyparse to report a parse error.
11181 May return void_type_node indicating that this method is actually
11182 a friend. See grokfield for more details.
11184 Came here with a `.pushlevel' .
11186 DO NOT MAKE ANY CHANGES TO THIS CODE WITHOUT MAKING CORRESPONDING
11187 CHANGES TO CODE IN `grokfield'. */
11190 start_method (cp_decl_specifier_seq *declspecs,
11191 const cp_declarator *declarator, tree attrlist)
11193 tree fndecl = grokdeclarator (declarator, declspecs, MEMFUNCDEF, 0,
11196 if (fndecl == error_mark_node)
11197 return error_mark_node;
11199 if (fndecl == NULL || TREE_CODE (fndecl) != FUNCTION_DECL)
11201 error ("invalid member function declaration");
11202 return error_mark_node;
11206 cplus_decl_attributes (&fndecl, attrlist, 0);
11208 /* Pass friends other than inline friend functions back. */
11209 if (fndecl == void_type_node)
11212 if (DECL_IN_AGGR_P (fndecl))
11214 if (DECL_CONTEXT (fndecl)
11215 && TREE_CODE (DECL_CONTEXT (fndecl)) != NAMESPACE_DECL)
11216 error ("%qD is already defined in class %qT", fndecl,
11217 DECL_CONTEXT (fndecl));
11218 return error_mark_node;
11221 check_template_shadow (fndecl);
11223 DECL_DECLARED_INLINE_P (fndecl) = 1;
11224 if (flag_default_inline)
11225 DECL_INLINE (fndecl) = 1;
11227 /* We process method specializations in finish_struct_1. */
11228 if (processing_template_decl && !DECL_TEMPLATE_SPECIALIZATION (fndecl))
11230 fndecl = push_template_decl (fndecl);
11231 if (fndecl == error_mark_node)
11235 if (! DECL_FRIEND_P (fndecl))
11237 if (TREE_CHAIN (fndecl))
11239 fndecl = copy_node (fndecl);
11240 TREE_CHAIN (fndecl) = NULL_TREE;
11244 finish_decl (fndecl, NULL_TREE, NULL_TREE);
11246 /* Make a place for the parms. */
11247 begin_scope (sk_function_parms, fndecl);
11249 DECL_IN_AGGR_P (fndecl) = 1;
11253 /* Go through the motions of finishing a function definition.
11254 We don't compile this method until after the whole class has
11257 FINISH_METHOD must return something that looks as though it
11258 came from GROKFIELD (since we are defining a method, after all).
11260 This is called after parsing the body of the function definition.
11261 STMTS is the chain of statements that makes up the function body.
11263 DECL is the ..._DECL that `start_method' provided. */
11266 finish_method (tree decl)
11268 tree fndecl = decl;
11273 if (decl == void_type_node)
11276 old_initial = DECL_INITIAL (fndecl);
11278 /* Undo the level for the parms (from start_method).
11279 This is like poplevel, but it causes nothing to be
11280 saved. Saving information here confuses symbol-table
11281 output routines. Besides, this information will
11282 be correctly output when this method is actually
11285 /* Clear out the meanings of the local variables of this level;
11286 also record in each decl which block it belongs to. */
11288 for (link = current_binding_level->names; link; link = TREE_CHAIN (link))
11290 if (DECL_NAME (link) != NULL_TREE)
11291 pop_binding (DECL_NAME (link), link);
11292 gcc_assert (TREE_CODE (link) != FUNCTION_DECL);
11293 DECL_CONTEXT (link) = NULL_TREE;
11296 poplevel (0, 0, 0);
11298 DECL_INITIAL (fndecl) = old_initial;
11300 /* We used to check if the context of FNDECL was different from
11301 current_class_type as another way to get inside here. This didn't work
11302 for String.cc in libg++. */
11303 if (DECL_FRIEND_P (fndecl))
11305 VEC_safe_push (tree, gc, CLASSTYPE_INLINE_FRIENDS (current_class_type),
11307 decl = void_type_node;
11314 /* VAR is a VAR_DECL. If its type is incomplete, remember VAR so that
11315 we can lay it out later, when and if its type becomes complete. */
11318 maybe_register_incomplete_var (tree var)
11320 gcc_assert (TREE_CODE (var) == VAR_DECL);
11322 /* Keep track of variables with incomplete types. */
11323 if (!processing_template_decl && TREE_TYPE (var) != error_mark_node
11324 && DECL_EXTERNAL (var))
11326 tree inner_type = TREE_TYPE (var);
11328 while (TREE_CODE (inner_type) == ARRAY_TYPE)
11329 inner_type = TREE_TYPE (inner_type);
11330 inner_type = TYPE_MAIN_VARIANT (inner_type);
11332 if ((!COMPLETE_TYPE_P (inner_type) && CLASS_TYPE_P (inner_type))
11333 /* RTTI TD entries are created while defining the type_info. */
11334 || (TYPE_LANG_SPECIFIC (inner_type)
11335 && TYPE_BEING_DEFINED (inner_type)))
11336 incomplete_vars = tree_cons (inner_type, var, incomplete_vars);
11340 /* Called when a class type (given by TYPE) is defined. If there are
11341 any existing VAR_DECLs whose type hsa been completed by this
11342 declaration, update them now. */
11345 complete_vars (tree type)
11347 tree *list = &incomplete_vars;
11349 gcc_assert (CLASS_TYPE_P (type));
11352 if (same_type_p (type, TREE_PURPOSE (*list)))
11354 tree var = TREE_VALUE (*list);
11355 tree type = TREE_TYPE (var);
11356 /* Complete the type of the variable. The VAR_DECL itself
11357 will be laid out in expand_expr. */
11358 complete_type (type);
11359 cp_apply_type_quals_to_decl (cp_type_quals (type), var);
11360 /* Remove this entry from the list. */
11361 *list = TREE_CHAIN (*list);
11364 list = &TREE_CHAIN (*list);
11367 /* Check for pending declarations which may have abstract type. */
11368 complete_type_check_abstract (type);
11371 /* If DECL is of a type which needs a cleanup, build that cleanup
11375 cxx_maybe_build_cleanup (tree decl)
11377 tree type = TREE_TYPE (decl);
11379 if (type != error_mark_node && TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type))
11381 int flags = LOOKUP_NORMAL|LOOKUP_DESTRUCTOR;
11383 bool has_vbases = (TREE_CODE (type) == RECORD_TYPE
11384 && CLASSTYPE_VBASECLASSES (type));
11386 if (TREE_CODE (type) == ARRAY_TYPE)
11390 cxx_mark_addressable (decl);
11391 rval = build_unary_op (ADDR_EXPR, decl, 0);
11394 /* Optimize for space over speed here. */
11395 if (!has_vbases || flag_expensive_optimizations)
11396 flags |= LOOKUP_NONVIRTUAL;
11398 rval = build_delete (TREE_TYPE (rval), rval,
11399 sfk_complete_destructor, flags, 0);
11406 /* When a stmt has been parsed, this function is called. */
11413 /* DECL was originally constructed as a non-static member function,
11414 but turned out to be static. Update it accordingly. */
11417 revert_static_member_fn (tree decl)
11420 tree function = TREE_TYPE (decl);
11421 tree args = TYPE_ARG_TYPES (function);
11423 if (cp_type_quals (TREE_TYPE (TREE_VALUE (args)))
11424 != TYPE_UNQUALIFIED)
11425 error ("static member function %q#D declared with type qualifiers", decl);
11427 args = TREE_CHAIN (args);
11428 tmp = build_function_type (TREE_TYPE (function), args);
11429 tmp = build_qualified_type (tmp, cp_type_quals (function));
11430 tmp = build_exception_variant (tmp,
11431 TYPE_RAISES_EXCEPTIONS (function));
11432 TREE_TYPE (decl) = tmp;
11433 if (DECL_ARGUMENTS (decl))
11434 DECL_ARGUMENTS (decl) = TREE_CHAIN (DECL_ARGUMENTS (decl));
11435 DECL_STATIC_FUNCTION_P (decl) = 1;
11438 /* Initialize the variables used during compilation of a C++
11442 cxx_push_function_context (struct function * f)
11444 struct language_function *p = GGC_CNEW (struct language_function);
11447 /* Whenever we start a new function, we destroy temporaries in the
11449 current_stmt_tree ()->stmts_are_full_exprs_p = 1;
11455 if (DECL_SAVED_FUNCTION_DATA (fn))
11457 /* If we already parsed this function, and we're just expanding it
11458 now, restore saved state. */
11459 *cp_function_chain = *DECL_SAVED_FUNCTION_DATA (fn);
11461 /* We don't need the saved data anymore. Unless this is an inline
11462 function; we need the named return value info for
11463 declare_return_variable. */
11464 if (! DECL_INLINE (fn))
11465 DECL_SAVED_FUNCTION_DATA (fn) = NULL;
11470 /* Free the language-specific parts of F, now that we've finished
11471 compiling the function. */
11474 cxx_pop_function_context (struct function * f)
11479 /* Return which tree structure is used by T, or TS_CP_GENERIC if T is
11480 one of the language-independent trees. */
11482 enum cp_tree_node_structure_enum
11483 cp_tree_node_structure (union lang_tree_node * t)
11485 switch (TREE_CODE (&t->generic))
11487 case DEFAULT_ARG: return TS_CP_DEFAULT_ARG;
11488 case IDENTIFIER_NODE: return TS_CP_IDENTIFIER;
11489 case OVERLOAD: return TS_CP_OVERLOAD;
11490 case TEMPLATE_PARM_INDEX: return TS_CP_TPI;
11491 case TINST_LEVEL: return TS_CP_TINST_LEVEL;
11492 case PTRMEM_CST: return TS_CP_PTRMEM;
11493 case BASELINK: return TS_CP_BASELINK;
11494 default: return TS_CP_GENERIC;
11498 /* Build the void_list_node (void_type_node having been created). */
11500 build_void_list_node (void)
11502 tree t = build_tree_list (NULL_TREE, void_type_node);
11507 cp_missing_noreturn_ok_p (tree decl)
11509 /* A missing noreturn is ok for the `main' function. */
11510 return DECL_MAIN_P (decl);
11513 /* Return the COMDAT group into which DECL should be placed. */
11516 cxx_comdat_group (tree decl)
11520 /* Virtual tables, construction virtual tables, and virtual table
11521 tables all go in a single COMDAT group, named after the primary
11523 if (TREE_CODE (decl) == VAR_DECL && DECL_VTABLE_OR_VTT_P (decl))
11524 name = DECL_ASSEMBLER_NAME (CLASSTYPE_VTABLES (DECL_CONTEXT (decl)));
11525 /* For all other DECLs, the COMDAT group is the mangled name of the
11526 declaration itself. */
11529 while (DECL_THUNK_P (decl))
11531 /* If TARGET_USE_LOCAL_THUNK_ALIAS_P, use_thunk puts the thunk
11532 into the same section as the target function. In that case
11533 we must return target's name. */
11534 tree target = THUNK_TARGET (decl);
11535 if (TARGET_USE_LOCAL_THUNK_ALIAS_P (target)
11536 && DECL_SECTION_NAME (target) != NULL
11537 && DECL_ONE_ONLY (target))
11542 name = DECL_ASSEMBLER_NAME (decl);
11545 return IDENTIFIER_POINTER (name);
11548 #include "gt-cp-decl.h"