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;
148 tree cp_global_trees[CPTI_MAX];
150 /* Indicates that there is a type value in some namespace, although
151 that is not necessarily in scope at the moment. */
153 tree global_type_node;
155 /* The node that holds the "name" of the global scope. */
156 tree global_scope_name;
158 #define local_names cp_function_chain->x_local_names
160 /* A list of objects which have constructors or destructors
161 which reside in the global scope. The decl is stored in
162 the TREE_VALUE slot and the initializer is stored
163 in the TREE_PURPOSE slot. */
164 tree static_aggregates;
168 /* A node for the integer constants 2, and 3. */
170 tree integer_two_node, integer_three_node;
172 /* Used only for jumps to as-yet undefined labels, since jumps to
173 defined labels can have their validity checked immediately. */
175 struct named_label_use_entry GTY(())
177 struct named_label_use_entry *next;
178 /* The binding level to which this entry is *currently* attached.
179 This is initially the binding level in which the goto appeared,
180 but is modified as scopes are closed. */
181 struct cp_binding_level *binding_level;
182 /* The head of the names list that was current when the goto appeared,
183 or the inner scope popped. These are the decls that will *not* be
184 skipped when jumping to the label. */
186 /* The location of the goto, for error reporting. */
187 location_t o_goto_locus;
188 /* True if an OpenMP structured block scope has been closed since
189 the goto appeared. This means that the branch from the label will
190 illegally exit an OpenMP scope. */
194 /* A list of all LABEL_DECLs in the function that have names. Here so
195 we can clear out their names' definitions at the end of the
196 function, and so we can check the validity of jumps to these labels. */
198 struct named_label_entry GTY(())
200 /* The decl itself. */
203 /* The binding level to which the label is *currently* attached.
204 This is initially set to the binding level in which the label
205 is defined, but is modified as scopes are closed. */
206 struct cp_binding_level *binding_level;
207 /* The head of the names list that was current when the label was
208 defined, or the inner scope popped. These are the decls that will
209 be skipped when jumping to the label. */
211 /* A tree list of all decls from all binding levels that would be
212 crossed by a backward branch to the label. */
215 /* A list of uses of the label, before the label is defined. */
216 struct named_label_use_entry *uses;
218 /* The following bits are set after the label is defined, and are
219 updated as scopes are popped. They indicate that a backward jump
220 to the label will illegally enter a scope of the given flavour. */
226 #define named_labels cp_function_chain->x_named_labels
228 /* The number of function bodies which we are currently processing.
229 (Zero if we are at namespace scope, one inside the body of a
230 function, two inside the body of a function in a local class, etc.) */
233 /* States indicating how grokdeclarator() should handle declspecs marked
234 with __attribute__((deprecated)). An object declared as
235 __attribute__((deprecated)) suppresses warnings of uses of other
238 enum deprecated_states {
243 static enum deprecated_states deprecated_state = DEPRECATED_NORMAL;
245 /* True if a declaration with an `extern' linkage specifier is being
247 bool have_extern_spec;
250 /* A TREE_LIST of VAR_DECLs. The TREE_PURPOSE is a RECORD_TYPE or
251 UNION_TYPE; the TREE_VALUE is a VAR_DECL with that type. At the
252 time the VAR_DECL was declared, the type was incomplete. */
254 static GTY(()) tree incomplete_vars;
256 /* Returns the kind of template specialization we are currently
257 processing, given that it's declaration contained N_CLASS_SCOPES
258 explicit scope qualifications. */
261 current_tmpl_spec_kind (int n_class_scopes)
263 int n_template_parm_scopes = 0;
264 int seen_specialization_p = 0;
265 int innermost_specialization_p = 0;
266 struct cp_binding_level *b;
268 /* Scan through the template parameter scopes. */
269 for (b = current_binding_level;
270 b->kind == sk_template_parms;
273 /* If we see a specialization scope inside a parameter scope,
274 then something is wrong. That corresponds to a declaration
277 template <class T> template <> ...
279 which is always invalid since [temp.expl.spec] forbids the
280 specialization of a class member template if the enclosing
281 class templates are not explicitly specialized as well. */
282 if (b->explicit_spec_p)
284 if (n_template_parm_scopes == 0)
285 innermost_specialization_p = 1;
287 seen_specialization_p = 1;
289 else if (seen_specialization_p == 1)
290 return tsk_invalid_member_spec;
292 ++n_template_parm_scopes;
295 /* Handle explicit instantiations. */
296 if (processing_explicit_instantiation)
298 if (n_template_parm_scopes != 0)
299 /* We've seen a template parameter list during an explicit
300 instantiation. For example:
302 template <class T> template void f(int);
304 This is erroneous. */
305 return tsk_invalid_expl_inst;
307 return tsk_expl_inst;
310 if (n_template_parm_scopes < n_class_scopes)
311 /* We've not seen enough template headers to match all the
312 specialized classes present. For example:
314 template <class T> void R<T>::S<T>::f(int);
316 This is invalid; there needs to be one set of template
317 parameters for each class. */
318 return tsk_insufficient_parms;
319 else if (n_template_parm_scopes == n_class_scopes)
320 /* We're processing a non-template declaration (even though it may
321 be a member of a template class.) For example:
323 template <class T> void S<T>::f(int);
325 The `class T' maches the `S<T>', leaving no template headers
326 corresponding to the `f'. */
328 else if (n_template_parm_scopes > n_class_scopes + 1)
329 /* We've got too many template headers. For example:
331 template <> template <class T> void f (T);
333 There need to be more enclosing classes. */
334 return tsk_excessive_parms;
336 /* This must be a template. It's of the form:
338 template <class T> template <class U> void S<T>::f(U);
340 This is a specialization if the innermost level was a
341 specialization; otherwise it's just a definition of the
343 return innermost_specialization_p ? tsk_expl_spec : tsk_template;
346 /* Exit the current scope. */
354 /* When a label goes out of scope, check to see if that label was used
355 in a valid manner, and issue any appropriate warnings or errors. */
358 pop_label (tree label, tree old_value)
360 if (!processing_template_decl)
362 if (DECL_INITIAL (label) == NULL_TREE)
366 error ("label %q+D used but not defined", label);
367 #ifdef USE_MAPPED_LOCATION
368 location = input_location; /* FIXME want (input_filename, (line)0) */
370 location.file = input_filename;
373 /* Avoid crashing later. */
374 define_label (location, DECL_NAME (label));
376 else if (!TREE_USED (label))
377 warning (OPT_Wunused_label, "label %q+D defined but not used", label);
380 SET_IDENTIFIER_LABEL_VALUE (DECL_NAME (label), old_value);
383 /* At the end of a function, all labels declared within the function
384 go out of scope. BLOCK is the top-level block for the
388 pop_labels_1 (void **slot, void *data)
390 struct named_label_entry *ent = (struct named_label_entry *) *slot;
391 tree block = (tree) data;
393 pop_label (ent->label_decl, NULL_TREE);
395 /* Put the labels into the "variables" of the top-level block,
396 so debugger can see them. */
397 TREE_CHAIN (ent->label_decl) = BLOCK_VARS (block);
398 BLOCK_VARS (block) = ent->label_decl;
400 htab_clear_slot (named_labels, slot);
406 pop_labels (tree block)
410 htab_traverse (named_labels, pop_labels_1, block);
415 /* At the end of a block with local labels, restore the outer definition. */
418 pop_local_label (tree label, tree old_value)
420 struct named_label_entry dummy;
423 pop_label (label, old_value);
425 dummy.label_decl = label;
426 slot = htab_find_slot (named_labels, &dummy, NO_INSERT);
427 htab_clear_slot (named_labels, slot);
430 /* The following two routines are used to interface to Objective-C++.
431 The binding level is purposely treated as an opaque type. */
434 objc_get_current_scope (void)
436 return current_binding_level;
439 /* The following routine is used by the NeXT-style SJLJ exceptions;
440 variables get marked 'volatile' so as to not be clobbered by
441 _setjmp()/_longjmp() calls. All variables in the current scope,
442 as well as parent scopes up to (but not including) ENCLOSING_BLK
443 shall be thusly marked. */
446 objc_mark_locals_volatile (void *enclosing_blk)
448 struct cp_binding_level *scope;
450 for (scope = current_binding_level;
451 scope && scope != enclosing_blk;
452 scope = scope->level_chain)
456 for (decl = scope->names; decl; decl = TREE_CHAIN (decl))
457 objc_volatilize_decl (decl);
459 /* Do not climb up past the current function. */
460 if (scope->kind == sk_function_parms)
465 /* Update data for defined and undefined labels when leaving a scope. */
468 poplevel_named_label_1 (void **slot, void *data)
470 struct named_label_entry *ent = (struct named_label_entry *) *slot;
471 struct cp_binding_level *bl = (struct cp_binding_level *) data;
472 struct cp_binding_level *obl = bl->level_chain;
474 if (ent->binding_level == bl)
478 for (decl = ent->names_in_scope; decl; decl = TREE_CHAIN (decl))
479 if (decl_jump_unsafe (decl))
480 ent->bad_decls = tree_cons (NULL, decl, ent->bad_decls);
482 ent->binding_level = obl;
483 ent->names_in_scope = obl->names;
487 ent->in_try_scope = true;
490 ent->in_catch_scope = true;
493 ent->in_omp_scope = true;
501 struct named_label_use_entry *use;
503 for (use = ent->uses; use ; use = use->next)
504 if (use->binding_level == bl)
506 use->binding_level = obl;
507 use->names_in_scope = obl->names;
508 if (bl->kind == sk_omp)
509 use->in_omp_scope = true;
516 /* Exit a binding level.
517 Pop the level off, and restore the state of the identifier-decl mappings
518 that were in effect when this level was entered.
520 If KEEP == 1, this level had explicit declarations, so
521 and create a "block" (a BLOCK node) for the level
522 to record its declarations and subblocks for symbol table output.
524 If FUNCTIONBODY is nonzero, this level is the body of a function,
525 so create a block as if KEEP were set and also clear out all
528 If REVERSE is nonzero, reverse the order of decls before putting
529 them into the BLOCK. */
532 poplevel (int keep, int reverse, int functionbody)
535 /* The chain of decls was accumulated in reverse order.
536 Put it into forward order, just for cleanliness. */
538 int tmp = functionbody;
539 int real_functionbody;
543 int leaving_for_scope;
546 timevar_push (TV_NAME_LOOKUP);
551 gcc_assert (current_binding_level->kind != sk_class);
553 real_functionbody = (current_binding_level->kind == sk_cleanup
554 ? ((functionbody = 0), tmp) : functionbody);
555 subblocks = functionbody >= 0 ? current_binding_level->blocks : 0;
557 gcc_assert (!VEC_length(cp_class_binding,
558 current_binding_level->class_shadowed));
560 /* We used to use KEEP == 2 to indicate that the new block should go
561 at the beginning of the list of blocks at this binding level,
562 rather than the end. This hack is no longer used. */
563 gcc_assert (keep == 0 || keep == 1);
565 if (current_binding_level->keep)
568 /* Any uses of undefined labels, and any defined labels, now operate
569 under constraints of next binding contour. */
570 if (cfun && !functionbody && named_labels)
571 htab_traverse (named_labels, poplevel_named_label_1,
572 current_binding_level);
574 /* Get the decls in the order they were written.
575 Usually current_binding_level->names is in reverse order.
576 But parameter decls were previously put in forward order. */
579 current_binding_level->names
580 = decls = nreverse (current_binding_level->names);
582 decls = current_binding_level->names;
584 /* If there were any declarations or structure tags in that level,
585 or if this level is a function body,
586 create a BLOCK to record them for the life of this function. */
588 if (keep == 1 || functionbody)
589 block = make_node (BLOCK);
590 if (block != NULL_TREE)
592 BLOCK_VARS (block) = decls;
593 BLOCK_SUBBLOCKS (block) = subblocks;
596 /* In each subblock, record that this is its superior. */
598 for (link = subblocks; link; link = TREE_CHAIN (link))
599 BLOCK_SUPERCONTEXT (link) = block;
601 /* We still support the old for-scope rules, whereby the variables
602 in a for-init statement were in scope after the for-statement
603 ended. We only use the new rules if flag_new_for_scope is
606 = current_binding_level->kind == sk_for && flag_new_for_scope == 1;
608 /* Before we remove the declarations first check for unused variables. */
609 if (warn_unused_variable
610 && !processing_template_decl)
611 for (decl = getdecls (); decl; decl = TREE_CHAIN (decl))
612 if (TREE_CODE (decl) == VAR_DECL
613 && ! TREE_USED (decl)
614 && ! DECL_IN_SYSTEM_HEADER (decl)
615 && DECL_NAME (decl) && ! DECL_ARTIFICIAL (decl))
616 warning (OPT_Wunused_variable, "unused variable %q+D", decl);
618 /* Remove declarations for all the DECLs in this level. */
619 for (link = decls; link; link = TREE_CHAIN (link))
621 if (leaving_for_scope && TREE_CODE (link) == VAR_DECL
624 tree name = DECL_NAME (link);
628 ob = outer_binding (name,
629 IDENTIFIER_BINDING (name),
632 ns_binding = IDENTIFIER_NAMESPACE_VALUE (name);
634 ns_binding = NULL_TREE;
636 if (ob && ob->scope == current_binding_level->level_chain)
637 /* We have something like:
642 and we are leaving the `for' scope. There's no reason to
643 keep the binding of the inner `i' in this case. */
644 pop_binding (name, link);
645 else if ((ob && (TREE_CODE (ob->value) == TYPE_DECL))
646 || (ns_binding && TREE_CODE (ns_binding) == TYPE_DECL))
647 /* Here, we have something like:
655 We must pop the for-scope binding so we know what's a
656 type and what isn't. */
657 pop_binding (name, link);
660 /* Mark this VAR_DECL as dead so that we can tell we left it
661 there only for backward compatibility. */
662 DECL_DEAD_FOR_LOCAL (link) = 1;
664 /* Keep track of what should have happened when we
665 popped the binding. */
668 SET_DECL_SHADOWED_FOR_VAR (link, ob->value);
669 DECL_HAS_SHADOWED_FOR_VAR_P (link) = 1;
672 /* Add it to the list of dead variables in the next
673 outermost binding to that we can remove these when we
674 leave that binding. */
675 current_binding_level->level_chain->dead_vars_from_for
676 = tree_cons (NULL_TREE, link,
677 current_binding_level->level_chain->
680 /* Although we don't pop the cxx_binding, we do clear
681 its SCOPE since the scope is going away now. */
682 IDENTIFIER_BINDING (name)->scope
683 = current_binding_level->level_chain;
690 /* Remove the binding. */
693 if (TREE_CODE (decl) == TREE_LIST)
694 decl = TREE_VALUE (decl);
697 if (TREE_CODE (name) == OVERLOAD)
698 name = OVL_FUNCTION (name);
700 gcc_assert (DECL_P (name));
701 pop_binding (DECL_NAME (name), decl);
705 /* Remove declarations for any `for' variables from inner scopes
706 that we kept around. */
707 for (link = current_binding_level->dead_vars_from_for;
708 link; link = TREE_CHAIN (link))
709 pop_binding (DECL_NAME (TREE_VALUE (link)), TREE_VALUE (link));
711 /* Restore the IDENTIFIER_TYPE_VALUEs. */
712 for (link = current_binding_level->type_shadowed;
713 link; link = TREE_CHAIN (link))
714 SET_IDENTIFIER_TYPE_VALUE (TREE_PURPOSE (link), TREE_VALUE (link));
716 /* Restore the IDENTIFIER_LABEL_VALUEs for local labels. */
717 for (link = current_binding_level->shadowed_labels;
719 link = TREE_CHAIN (link))
720 pop_local_label (TREE_VALUE (link), TREE_PURPOSE (link));
722 /* There may be OVERLOADs (wrapped in TREE_LISTs) on the BLOCK_VARs
723 list if a `using' declaration put them there. The debugging
724 back-ends won't understand OVERLOAD, so we remove them here.
725 Because the BLOCK_VARS are (temporarily) shared with
726 CURRENT_BINDING_LEVEL->NAMES we must do this fixup after we have
727 popped all the bindings. */
732 for (d = &BLOCK_VARS (block); *d; )
734 if (TREE_CODE (*d) == TREE_LIST)
735 *d = TREE_CHAIN (*d);
737 d = &TREE_CHAIN (*d);
741 /* If the level being exited is the top level of a function,
742 check over all the labels. */
745 /* Since this is the top level block of a function, the vars are
746 the function's parameters. Don't leave them in the BLOCK
747 because they are found in the FUNCTION_DECL instead. */
748 BLOCK_VARS (block) = 0;
752 kind = current_binding_level->kind;
753 if (kind == sk_cleanup)
757 /* If this is a temporary binding created for a cleanup, then we'll
758 have pushed a statement list level. Pop that, create a new
759 BIND_EXPR for the block, and insert it into the stream. */
760 stmt = pop_stmt_list (current_binding_level->statement_list);
761 stmt = c_build_bind_expr (block, stmt);
767 DECL_INITIAL (current_function_decl) = block;
769 current_binding_level->blocks
770 = chainon (current_binding_level->blocks, block);
772 /* If we did not make a block for the level just exited,
773 any blocks made for inner levels
774 (since they cannot be recorded as subblocks in that level)
775 must be carried forward so they will later become subblocks
776 of something else. */
778 current_binding_level->blocks
779 = chainon (current_binding_level->blocks, subblocks);
781 /* Each and every BLOCK node created here in `poplevel' is important
782 (e.g. for proper debugging information) so if we created one
783 earlier, mark it as "used". */
785 TREE_USED (block) = 1;
787 /* All temporary bindings created for cleanups are popped silently. */
788 if (kind == sk_cleanup)
791 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, block);
794 /* Insert BLOCK at the end of the list of subblocks of the
795 current binding level. This is used when a BIND_EXPR is expanded,
796 to handle the BLOCK node inside the BIND_EXPR. */
799 insert_block (tree block)
801 TREE_USED (block) = 1;
802 current_binding_level->blocks
803 = chainon (current_binding_level->blocks, block);
806 /* Walk all the namespaces contained NAMESPACE, including NAMESPACE
807 itself, calling F for each. The DATA is passed to F as well. */
810 walk_namespaces_r (tree namespace, walk_namespaces_fn f, void* data)
813 tree current = NAMESPACE_LEVEL (namespace)->namespaces;
815 result |= (*f) (namespace, data);
817 for (; current; current = TREE_CHAIN (current))
818 result |= walk_namespaces_r (current, f, data);
823 /* Walk all the namespaces, calling F for each. The DATA is passed to
827 walk_namespaces (walk_namespaces_fn f, void* data)
829 return walk_namespaces_r (global_namespace, f, data);
832 /* Call wrapup_globals_declarations for the globals in NAMESPACE. If
833 DATA is non-NULL, this is the last time we will call
834 wrapup_global_declarations for this NAMESPACE. */
837 wrapup_globals_for_namespace (tree namespace, void* data)
839 struct cp_binding_level *level = NAMESPACE_LEVEL (namespace);
840 VEC(tree,gc) *statics = level->static_decls;
841 tree *vec = VEC_address (tree, statics);
842 int len = VEC_length (tree, statics);
843 int last_time = (data != 0);
847 check_global_declarations (vec, len);
848 emit_debug_global_declarations (vec, len);
852 /* Write out any globals that need to be output. */
853 return wrapup_global_declarations (vec, len);
857 /* In C++, you don't have to write `struct S' to refer to `S'; you
858 can just use `S'. We accomplish this by creating a TYPE_DECL as
859 if the user had written `typedef struct S S'. Create and return
860 the TYPE_DECL for TYPE. */
863 create_implicit_typedef (tree name, tree type)
867 decl = build_decl (TYPE_DECL, name, type);
868 DECL_ARTIFICIAL (decl) = 1;
869 /* There are other implicit type declarations, like the one *within*
870 a class that allows you to write `S::S'. We must distinguish
872 SET_DECL_IMPLICIT_TYPEDEF_P (decl);
873 TYPE_NAME (type) = decl;
878 /* Remember a local name for name-mangling purposes. */
881 push_local_name (tree decl)
886 timevar_push (TV_NAME_LOOKUP);
888 name = DECL_NAME (decl);
890 nelts = VEC_length (tree, local_names);
891 for (i = 0; i < nelts; i++)
893 t = VEC_index (tree, local_names, i);
894 if (DECL_NAME (t) == name)
896 if (!DECL_LANG_SPECIFIC (decl))
897 retrofit_lang_decl (decl);
898 DECL_LANG_SPECIFIC (decl)->decl_flags.u2sel = 1;
899 if (DECL_LANG_SPECIFIC (t))
900 DECL_DISCRIMINATOR (decl) = DECL_DISCRIMINATOR (t) + 1;
902 DECL_DISCRIMINATOR (decl) = 1;
904 VEC_replace (tree, local_names, i, decl);
905 timevar_pop (TV_NAME_LOOKUP);
910 VEC_safe_push (tree, gc, local_names, decl);
911 timevar_pop (TV_NAME_LOOKUP);
914 /* Subroutine of duplicate_decls: return truthvalue of whether
915 or not types of these decls match.
917 For C++, we must compare the parameter list so that `int' can match
918 `int&' in a parameter position, but `int&' is not confused with
922 decls_match (tree newdecl, tree olddecl)
926 if (newdecl == olddecl)
929 if (TREE_CODE (newdecl) != TREE_CODE (olddecl))
930 /* If the two DECLs are not even the same kind of thing, we're not
931 interested in their types. */
934 if (TREE_CODE (newdecl) == FUNCTION_DECL)
936 tree f1 = TREE_TYPE (newdecl);
937 tree f2 = TREE_TYPE (olddecl);
938 tree p1 = TYPE_ARG_TYPES (f1);
939 tree p2 = TYPE_ARG_TYPES (f2);
941 if (CP_DECL_CONTEXT (newdecl) != CP_DECL_CONTEXT (olddecl)
942 && ! (DECL_EXTERN_C_P (newdecl)
943 && DECL_EXTERN_C_P (olddecl)))
946 if (TREE_CODE (f1) != TREE_CODE (f2))
949 if (same_type_p (TREE_TYPE (f1), TREE_TYPE (f2)))
951 if (p2 == NULL_TREE && DECL_EXTERN_C_P (olddecl)
952 && (DECL_BUILT_IN (olddecl)
953 #ifndef NO_IMPLICIT_EXTERN_C
954 || (DECL_IN_SYSTEM_HEADER (newdecl) && !DECL_CLASS_SCOPE_P (newdecl))
955 || (DECL_IN_SYSTEM_HEADER (olddecl) && !DECL_CLASS_SCOPE_P (olddecl))
959 types_match = self_promoting_args_p (p1);
960 if (p1 == void_list_node)
961 TREE_TYPE (newdecl) = TREE_TYPE (olddecl);
963 #ifndef NO_IMPLICIT_EXTERN_C
964 else if (p1 == NULL_TREE
965 && (DECL_EXTERN_C_P (olddecl)
966 && DECL_IN_SYSTEM_HEADER (olddecl)
967 && !DECL_CLASS_SCOPE_P (olddecl))
968 && (DECL_EXTERN_C_P (newdecl)
969 && DECL_IN_SYSTEM_HEADER (newdecl)
970 && !DECL_CLASS_SCOPE_P (newdecl)))
972 types_match = self_promoting_args_p (p2);
973 TREE_TYPE (newdecl) = TREE_TYPE (olddecl);
977 types_match = compparms (p1, p2);
982 else if (TREE_CODE (newdecl) == TEMPLATE_DECL)
984 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl))
985 != TREE_CODE (DECL_TEMPLATE_RESULT (olddecl)))
988 if (!comp_template_parms (DECL_TEMPLATE_PARMS (newdecl),
989 DECL_TEMPLATE_PARMS (olddecl)))
992 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == TYPE_DECL)
993 types_match = same_type_p (TREE_TYPE (DECL_TEMPLATE_RESULT (olddecl)),
994 TREE_TYPE (DECL_TEMPLATE_RESULT (newdecl)));
996 types_match = decls_match (DECL_TEMPLATE_RESULT (olddecl),
997 DECL_TEMPLATE_RESULT (newdecl));
1001 /* Need to check scope for variable declaration (VAR_DECL).
1002 For typedef (TYPE_DECL), scope is ignored. */
1003 if (TREE_CODE (newdecl) == VAR_DECL
1004 && CP_DECL_CONTEXT (newdecl) != CP_DECL_CONTEXT (olddecl))
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 && DECL_LANGUAGE (newdecl) != DECL_LANGUAGE (olddecl))
1461 /* extern "C" int foo ();
1462 int foo () { bar (); }
1464 if (current_lang_depth () == 0)
1465 SET_DECL_LANGUAGE (newdecl, DECL_LANGUAGE (olddecl));
1468 error ("previous declaration of %q+#D with %qL linkage",
1469 olddecl, DECL_LANGUAGE (olddecl));
1470 error ("conflicts with new declaration with %qL linkage",
1471 DECL_LANGUAGE (newdecl));
1475 if (DECL_LANG_SPECIFIC (olddecl) && DECL_USE_TEMPLATE (olddecl))
1477 else if (TREE_CODE (olddecl) == FUNCTION_DECL)
1479 tree t1 = TYPE_ARG_TYPES (TREE_TYPE (olddecl));
1480 tree t2 = TYPE_ARG_TYPES (TREE_TYPE (newdecl));
1483 if (TREE_CODE (TREE_TYPE (newdecl)) == METHOD_TYPE)
1484 t1 = TREE_CHAIN (t1), t2 = TREE_CHAIN (t2);
1486 for (; t1 && t1 != void_list_node;
1487 t1 = TREE_CHAIN (t1), t2 = TREE_CHAIN (t2), i++)
1488 if (TREE_PURPOSE (t1) && TREE_PURPOSE (t2))
1490 if (1 == simple_cst_equal (TREE_PURPOSE (t1),
1493 pedwarn ("default argument given for parameter %d of %q#D",
1495 pedwarn ("after previous specification in %q+#D", olddecl);
1499 error ("default argument given for parameter %d of %q#D",
1501 error ("after previous specification in %q+#D",
1506 if (DECL_DECLARED_INLINE_P (newdecl)
1507 && ! DECL_DECLARED_INLINE_P (olddecl)
1508 && TREE_ADDRESSABLE (olddecl) && warn_inline)
1510 warning (0, "%q#D was used before it was declared inline", newdecl);
1511 warning (0, "%Jprevious non-inline declaration here", olddecl);
1516 /* Do not merge an implicit typedef with an explicit one. In:
1520 typedef class A A __attribute__ ((foo));
1522 the attribute should apply only to the typedef. */
1523 if (TREE_CODE (olddecl) == TYPE_DECL
1524 && (DECL_IMPLICIT_TYPEDEF_P (olddecl)
1525 || DECL_IMPLICIT_TYPEDEF_P (newdecl)))
1528 /* If new decl is `static' and an `extern' was seen previously,
1530 warn_extern_redeclared_static (newdecl, olddecl);
1532 /* We have committed to returning 1 at this point. */
1533 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1535 /* Now that functions must hold information normally held
1536 by field decls, there is extra work to do so that
1537 declaration information does not get destroyed during
1539 if (DECL_VINDEX (olddecl))
1540 DECL_VINDEX (newdecl) = DECL_VINDEX (olddecl);
1541 if (DECL_CONTEXT (olddecl))
1542 DECL_CONTEXT (newdecl) = DECL_CONTEXT (olddecl);
1543 DECL_STATIC_CONSTRUCTOR (newdecl) |= DECL_STATIC_CONSTRUCTOR (olddecl);
1544 DECL_STATIC_DESTRUCTOR (newdecl) |= DECL_STATIC_DESTRUCTOR (olddecl);
1545 DECL_PURE_VIRTUAL_P (newdecl) |= DECL_PURE_VIRTUAL_P (olddecl);
1546 DECL_VIRTUAL_P (newdecl) |= DECL_VIRTUAL_P (olddecl);
1547 DECL_THIS_STATIC (newdecl) |= DECL_THIS_STATIC (olddecl);
1548 if (DECL_OVERLOADED_OPERATOR_P (olddecl) != ERROR_MARK)
1549 SET_OVERLOADED_OPERATOR_CODE
1550 (newdecl, DECL_OVERLOADED_OPERATOR_P (olddecl));
1551 new_defines_function = DECL_INITIAL (newdecl) != NULL_TREE;
1553 /* Optionally warn about more than one declaration for the same
1554 name, but don't warn about a function declaration followed by a
1556 if (warn_redundant_decls && ! DECL_ARTIFICIAL (olddecl)
1557 && !(new_defines_function && DECL_INITIAL (olddecl) == NULL_TREE)
1558 /* Don't warn about extern decl followed by definition. */
1559 && !(DECL_EXTERNAL (olddecl) && ! DECL_EXTERNAL (newdecl))
1560 /* Don't warn about friends, let add_friend take care of it. */
1561 && ! (newdecl_is_friend || DECL_FRIEND_P (olddecl)))
1563 warning (OPT_Wredundant_decls, "redundant redeclaration of %qD in same scope", newdecl);
1564 warning (OPT_Wredundant_decls, "previous declaration of %q+D", olddecl);
1568 /* Deal with C++: must preserve virtual function table size. */
1569 if (TREE_CODE (olddecl) == TYPE_DECL)
1571 tree newtype = TREE_TYPE (newdecl);
1572 tree oldtype = TREE_TYPE (olddecl);
1574 if (newtype != error_mark_node && oldtype != error_mark_node
1575 && TYPE_LANG_SPECIFIC (newtype) && TYPE_LANG_SPECIFIC (oldtype))
1576 CLASSTYPE_FRIEND_CLASSES (newtype)
1577 = CLASSTYPE_FRIEND_CLASSES (oldtype);
1579 DECL_ORIGINAL_TYPE (newdecl) = DECL_ORIGINAL_TYPE (olddecl);
1582 /* Copy all the DECL_... slots specified in the new decl
1583 except for any that we copy here from the old type. */
1584 DECL_ATTRIBUTES (newdecl)
1585 = (*targetm.merge_decl_attributes) (olddecl, newdecl);
1587 if (TREE_CODE (newdecl) == TEMPLATE_DECL)
1591 old_result = DECL_TEMPLATE_RESULT (olddecl);
1592 new_result = DECL_TEMPLATE_RESULT (newdecl);
1593 TREE_TYPE (olddecl) = TREE_TYPE (old_result);
1594 DECL_TEMPLATE_SPECIALIZATIONS (olddecl)
1595 = chainon (DECL_TEMPLATE_SPECIALIZATIONS (olddecl),
1596 DECL_TEMPLATE_SPECIALIZATIONS (newdecl));
1598 if (DECL_FUNCTION_TEMPLATE_P (newdecl))
1600 DECL_INLINE (old_result)
1601 |= DECL_INLINE (new_result);
1602 DECL_DECLARED_INLINE_P (old_result)
1603 |= DECL_DECLARED_INLINE_P (new_result);
1604 check_redeclaration_exception_specification (newdecl, olddecl);
1607 /* If the new declaration is a definition, update the file and
1608 line information on the declaration. */
1609 if (DECL_INITIAL (old_result) == NULL_TREE
1610 && DECL_INITIAL (new_result) != NULL_TREE)
1612 DECL_SOURCE_LOCATION (olddecl)
1613 = DECL_SOURCE_LOCATION (old_result)
1614 = DECL_SOURCE_LOCATION (newdecl);
1615 if (DECL_FUNCTION_TEMPLATE_P (newdecl))
1616 DECL_ARGUMENTS (old_result)
1617 = DECL_ARGUMENTS (new_result);
1625 /* Automatically handles default parameters. */
1626 tree oldtype = TREE_TYPE (olddecl);
1629 /* Merge the data types specified in the two decls. */
1630 newtype = merge_types (TREE_TYPE (newdecl), TREE_TYPE (olddecl));
1632 /* If merge_types produces a non-typedef type, just use the old type. */
1633 if (TREE_CODE (newdecl) == TYPE_DECL
1634 && newtype == DECL_ORIGINAL_TYPE (newdecl))
1637 if (TREE_CODE (newdecl) == VAR_DECL)
1639 DECL_THIS_EXTERN (newdecl) |= DECL_THIS_EXTERN (olddecl);
1640 DECL_INITIALIZED_P (newdecl) |= DECL_INITIALIZED_P (olddecl);
1641 DECL_NONTRIVIALLY_INITIALIZED_P (newdecl)
1642 |= DECL_NONTRIVIALLY_INITIALIZED_P (olddecl);
1643 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (newdecl)
1644 |= DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (olddecl);
1646 /* Merge the threadprivate attribute from OLDDECL into NEWDECL. */
1647 if (DECL_LANG_SPECIFIC (olddecl)
1648 && CP_DECL_THREADPRIVATE_P (olddecl))
1650 /* Allocate a LANG_SPECIFIC structure for NEWDECL, if needed. */
1651 if (!DECL_LANG_SPECIFIC (newdecl))
1652 retrofit_lang_decl (newdecl);
1654 DECL_TLS_MODEL (newdecl) = DECL_TLS_MODEL (olddecl);
1655 CP_DECL_THREADPRIVATE_P (newdecl) = 1;
1659 /* Do this after calling `merge_types' so that default
1660 parameters don't confuse us. */
1661 else if (TREE_CODE (newdecl) == FUNCTION_DECL)
1662 check_redeclaration_exception_specification (newdecl, olddecl);
1663 TREE_TYPE (newdecl) = TREE_TYPE (olddecl) = newtype;
1665 /* Lay the type out, unless already done. */
1666 if (! same_type_p (newtype, oldtype)
1667 && TREE_TYPE (newdecl) != error_mark_node
1668 && !(processing_template_decl && uses_template_parms (newdecl)))
1669 layout_type (TREE_TYPE (newdecl));
1671 if ((TREE_CODE (newdecl) == VAR_DECL
1672 || TREE_CODE (newdecl) == PARM_DECL
1673 || TREE_CODE (newdecl) == RESULT_DECL
1674 || TREE_CODE (newdecl) == FIELD_DECL
1675 || TREE_CODE (newdecl) == TYPE_DECL)
1676 && !(processing_template_decl && uses_template_parms (newdecl)))
1677 layout_decl (newdecl, 0);
1679 /* Merge the type qualifiers. */
1680 if (TREE_READONLY (newdecl))
1681 TREE_READONLY (olddecl) = 1;
1682 if (TREE_THIS_VOLATILE (newdecl))
1683 TREE_THIS_VOLATILE (olddecl) = 1;
1684 if (TREE_NOTHROW (newdecl))
1685 TREE_NOTHROW (olddecl) = 1;
1687 /* Merge deprecatedness. */
1688 if (TREE_DEPRECATED (newdecl))
1689 TREE_DEPRECATED (olddecl) = 1;
1691 /* Merge the initialization information. */
1692 if (DECL_INITIAL (newdecl) == NULL_TREE
1693 && DECL_INITIAL (olddecl) != NULL_TREE)
1695 DECL_INITIAL (newdecl) = DECL_INITIAL (olddecl);
1696 DECL_SOURCE_LOCATION (newdecl) = DECL_SOURCE_LOCATION (olddecl);
1697 if (CAN_HAVE_FULL_LANG_DECL_P (newdecl)
1698 && DECL_LANG_SPECIFIC (newdecl)
1699 && DECL_LANG_SPECIFIC (olddecl))
1701 DECL_SAVED_TREE (newdecl) = DECL_SAVED_TREE (olddecl);
1702 DECL_STRUCT_FUNCTION (newdecl) = DECL_STRUCT_FUNCTION (olddecl);
1706 /* Merge the section attribute.
1707 We want to issue an error if the sections conflict but that must be
1708 done later in decl_attributes since we are called before attributes
1710 if (DECL_SECTION_NAME (newdecl) == NULL_TREE)
1711 DECL_SECTION_NAME (newdecl) = DECL_SECTION_NAME (olddecl);
1713 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1715 DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (newdecl)
1716 |= DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (olddecl);
1717 DECL_NO_LIMIT_STACK (newdecl) |= DECL_NO_LIMIT_STACK (olddecl);
1718 TREE_THIS_VOLATILE (newdecl) |= TREE_THIS_VOLATILE (olddecl);
1719 TREE_READONLY (newdecl) |= TREE_READONLY (olddecl);
1720 TREE_NOTHROW (newdecl) |= TREE_NOTHROW (olddecl);
1721 DECL_IS_MALLOC (newdecl) |= DECL_IS_MALLOC (olddecl);
1722 DECL_IS_PURE (newdecl) |= DECL_IS_PURE (olddecl);
1723 /* Keep the old RTL. */
1724 COPY_DECL_RTL (olddecl, newdecl);
1726 else if (TREE_CODE (newdecl) == VAR_DECL
1727 && (DECL_SIZE (olddecl) || !DECL_SIZE (newdecl)))
1729 /* Keep the old RTL. We cannot keep the old RTL if the old
1730 declaration was for an incomplete object and the new
1731 declaration is not since many attributes of the RTL will
1733 COPY_DECL_RTL (olddecl, newdecl);
1736 /* If cannot merge, then use the new type and qualifiers,
1737 and don't preserve the old rtl. */
1740 /* Clean out any memory we had of the old declaration. */
1741 tree oldstatic = value_member (olddecl, static_aggregates);
1743 TREE_VALUE (oldstatic) = error_mark_node;
1745 TREE_TYPE (olddecl) = TREE_TYPE (newdecl);
1746 TREE_READONLY (olddecl) = TREE_READONLY (newdecl);
1747 TREE_THIS_VOLATILE (olddecl) = TREE_THIS_VOLATILE (newdecl);
1748 TREE_SIDE_EFFECTS (olddecl) = TREE_SIDE_EFFECTS (newdecl);
1751 /* Merge the storage class information. */
1752 merge_weak (newdecl, olddecl);
1754 DECL_ONE_ONLY (newdecl) |= DECL_ONE_ONLY (olddecl);
1755 DECL_DEFER_OUTPUT (newdecl) |= DECL_DEFER_OUTPUT (olddecl);
1756 TREE_PUBLIC (newdecl) = TREE_PUBLIC (olddecl);
1757 TREE_STATIC (olddecl) = TREE_STATIC (newdecl) |= TREE_STATIC (olddecl);
1758 if (! DECL_EXTERNAL (olddecl))
1759 DECL_EXTERNAL (newdecl) = 0;
1761 new_template = NULL_TREE;
1762 if (DECL_LANG_SPECIFIC (newdecl) && DECL_LANG_SPECIFIC (olddecl))
1764 DECL_INTERFACE_KNOWN (newdecl) |= DECL_INTERFACE_KNOWN (olddecl);
1765 DECL_NOT_REALLY_EXTERN (newdecl) |= DECL_NOT_REALLY_EXTERN (olddecl);
1766 DECL_COMDAT (newdecl) |= DECL_COMDAT (olddecl);
1767 DECL_TEMPLATE_INSTANTIATED (newdecl)
1768 |= DECL_TEMPLATE_INSTANTIATED (olddecl);
1770 /* If the OLDDECL is an instantiation and/or specialization,
1771 then the NEWDECL must be too. But, it may not yet be marked
1772 as such if the caller has created NEWDECL, but has not yet
1773 figured out that it is a redeclaration. */
1774 if (!DECL_USE_TEMPLATE (newdecl))
1775 DECL_USE_TEMPLATE (newdecl) = DECL_USE_TEMPLATE (olddecl);
1777 /* Don't really know how much of the language-specific
1778 values we should copy from old to new. */
1779 DECL_IN_AGGR_P (newdecl) = DECL_IN_AGGR_P (olddecl);
1780 DECL_LANG_SPECIFIC (newdecl)->decl_flags.u2 =
1781 DECL_LANG_SPECIFIC (olddecl)->decl_flags.u2;
1782 DECL_NONCONVERTING_P (newdecl) = DECL_NONCONVERTING_P (olddecl);
1783 DECL_REPO_AVAILABLE_P (newdecl) = DECL_REPO_AVAILABLE_P (olddecl);
1784 if (DECL_TEMPLATE_INFO (newdecl))
1785 new_template = DECL_TI_TEMPLATE (newdecl);
1786 DECL_TEMPLATE_INFO (newdecl) = DECL_TEMPLATE_INFO (olddecl);
1787 DECL_INITIALIZED_IN_CLASS_P (newdecl)
1788 |= DECL_INITIALIZED_IN_CLASS_P (olddecl);
1789 olddecl_friend = DECL_FRIEND_P (olddecl);
1790 hidden_friend = (DECL_ANTICIPATED (olddecl)
1791 && DECL_HIDDEN_FRIEND_P (olddecl)
1792 && newdecl_is_friend);
1794 /* Only functions have DECL_BEFRIENDING_CLASSES. */
1795 if (TREE_CODE (newdecl) == FUNCTION_DECL
1796 || DECL_FUNCTION_TEMPLATE_P (newdecl))
1798 DECL_BEFRIENDING_CLASSES (newdecl)
1799 = chainon (DECL_BEFRIENDING_CLASSES (newdecl),
1800 DECL_BEFRIENDING_CLASSES (olddecl));
1801 /* DECL_THUNKS is only valid for virtual functions,
1802 otherwise it is a DECL_FRIEND_CONTEXT. */
1803 if (DECL_VIRTUAL_P (newdecl))
1804 DECL_THUNKS (newdecl) = DECL_THUNKS (olddecl);
1808 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1810 if (DECL_TEMPLATE_INSTANTIATION (olddecl)
1811 && !DECL_TEMPLATE_INSTANTIATION (newdecl))
1813 /* If newdecl is not a specialization, then it is not a
1814 template-related function at all. And that means that we
1815 should have exited above, returning 0. */
1816 gcc_assert (DECL_TEMPLATE_SPECIALIZATION (newdecl));
1818 if (TREE_USED (olddecl))
1819 /* From [temp.expl.spec]:
1821 If a template, a member template or the member of a class
1822 template is explicitly specialized then that
1823 specialization shall be declared before the first use of
1824 that specialization that would cause an implicit
1825 instantiation to take place, in every translation unit in
1826 which such a use occurs. */
1827 error ("explicit specialization of %qD after first use",
1830 SET_DECL_TEMPLATE_SPECIALIZATION (olddecl);
1832 /* [temp.expl.spec/14] We don't inline explicit specialization
1833 just because the primary template says so. */
1837 if (DECL_PENDING_INLINE_INFO (newdecl) == 0)
1838 DECL_PENDING_INLINE_INFO (newdecl) = DECL_PENDING_INLINE_INFO (olddecl);
1840 DECL_DECLARED_INLINE_P (newdecl) |= DECL_DECLARED_INLINE_P (olddecl);
1842 /* If either decl says `inline', this fn is inline, unless
1843 its definition was passed already. */
1844 if (DECL_INLINE (newdecl) && DECL_INITIAL (olddecl) == NULL_TREE)
1845 DECL_INLINE (olddecl) = 1;
1846 DECL_INLINE (newdecl) = DECL_INLINE (olddecl);
1848 DECL_UNINLINABLE (newdecl) = DECL_UNINLINABLE (olddecl)
1849 = (DECL_UNINLINABLE (newdecl) || DECL_UNINLINABLE (olddecl));
1852 /* Preserve abstractness on cloned [cd]tors. */
1853 DECL_ABSTRACT (newdecl) = DECL_ABSTRACT (olddecl);
1857 SET_DECL_LANGUAGE (olddecl, DECL_LANGUAGE (newdecl));
1858 COPY_DECL_ASSEMBLER_NAME (newdecl, olddecl);
1859 COPY_DECL_RTL (newdecl, olddecl);
1861 if (! types_match || new_defines_function)
1863 /* These need to be copied so that the names are available.
1864 Note that if the types do match, we'll preserve inline
1865 info and other bits, but if not, we won't. */
1866 DECL_ARGUMENTS (olddecl) = DECL_ARGUMENTS (newdecl);
1867 DECL_RESULT (olddecl) = DECL_RESULT (newdecl);
1869 if (new_defines_function)
1870 /* If defining a function declared with other language
1871 linkage, use the previously declared language linkage. */
1872 SET_DECL_LANGUAGE (newdecl, DECL_LANGUAGE (olddecl));
1873 else if (types_match)
1875 /* If redeclaring a builtin function, and not a definition,
1876 it stays built in. */
1877 if (DECL_BUILT_IN (olddecl))
1879 DECL_BUILT_IN_CLASS (newdecl) = DECL_BUILT_IN_CLASS (olddecl);
1880 DECL_FUNCTION_CODE (newdecl) = DECL_FUNCTION_CODE (olddecl);
1881 /* If we're keeping the built-in definition, keep the rtl,
1882 regardless of declaration matches. */
1883 COPY_DECL_RTL (olddecl, newdecl);
1886 DECL_RESULT (newdecl) = DECL_RESULT (olddecl);
1887 /* Don't clear out the arguments if we're redefining a function. */
1888 if (DECL_ARGUMENTS (olddecl))
1889 DECL_ARGUMENTS (newdecl) = DECL_ARGUMENTS (olddecl);
1892 else if (TREE_CODE (newdecl) == NAMESPACE_DECL)
1893 NAMESPACE_LEVEL (newdecl) = NAMESPACE_LEVEL (olddecl);
1895 /* Now preserve various other info from the definition. */
1896 TREE_ADDRESSABLE (newdecl) = TREE_ADDRESSABLE (olddecl);
1897 TREE_ASM_WRITTEN (newdecl) = TREE_ASM_WRITTEN (olddecl);
1898 DECL_COMMON (newdecl) = DECL_COMMON (olddecl);
1899 COPY_DECL_ASSEMBLER_NAME (olddecl, newdecl);
1901 /* Warn about conflicting visibility specifications. */
1902 if (DECL_VISIBILITY_SPECIFIED (olddecl)
1903 && DECL_VISIBILITY_SPECIFIED (newdecl)
1904 && DECL_VISIBILITY (newdecl) != DECL_VISIBILITY (olddecl))
1906 warning (OPT_Wattributes, "%q+D: visibility attribute ignored "
1907 "because it", newdecl);
1908 warning (OPT_Wattributes, "%Jconflicts with previous "
1909 "declaration here", olddecl);
1911 /* Choose the declaration which specified visibility. */
1912 if (DECL_VISIBILITY_SPECIFIED (olddecl))
1914 DECL_VISIBILITY (newdecl) = DECL_VISIBILITY (olddecl);
1915 DECL_VISIBILITY_SPECIFIED (newdecl) = 1;
1917 /* Init priority used to be merged from newdecl to olddecl by the memcpy,
1918 so keep this behavior. */
1919 if (TREE_CODE (newdecl) == VAR_DECL && DECL_HAS_INIT_PRIORITY_P (newdecl))
1921 SET_DECL_INIT_PRIORITY (olddecl, DECL_INIT_PRIORITY (newdecl));
1922 DECL_HAS_INIT_PRIORITY_P (olddecl) = 1;
1925 /* The DECL_LANG_SPECIFIC information in OLDDECL will be replaced
1926 with that from NEWDECL below. */
1927 if (DECL_LANG_SPECIFIC (olddecl))
1929 gcc_assert (DECL_LANG_SPECIFIC (olddecl)
1930 != DECL_LANG_SPECIFIC (newdecl));
1931 ggc_free (DECL_LANG_SPECIFIC (olddecl));
1934 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1938 function_size = sizeof (struct tree_decl_common);
1940 memcpy ((char *) olddecl + sizeof (struct tree_common),
1941 (char *) newdecl + sizeof (struct tree_common),
1942 function_size - sizeof (struct tree_common));
1944 memcpy ((char *) olddecl + sizeof (struct tree_decl_common),
1945 (char *) newdecl + sizeof (struct tree_decl_common),
1946 sizeof (struct tree_function_decl) - sizeof (struct tree_decl_common));
1948 /* If newdecl is a template instantiation, it is possible that
1949 the following sequence of events has occurred:
1951 o A friend function was declared in a class template. The
1952 class template was instantiated.
1954 o The instantiation of the friend declaration was
1955 recorded on the instantiation list, and is newdecl.
1957 o Later, however, instantiate_class_template called pushdecl
1958 on the newdecl to perform name injection. But, pushdecl in
1959 turn called duplicate_decls when it discovered that another
1960 declaration of a global function with the same name already
1963 o Here, in duplicate_decls, we decided to clobber newdecl.
1965 If we're going to do that, we'd better make sure that
1966 olddecl, and not newdecl, is on the list of
1967 instantiations so that if we try to do the instantiation
1968 again we won't get the clobbered declaration. */
1969 reregister_specialization (newdecl,
1975 size_t size = tree_code_size (TREE_CODE (olddecl));
1976 memcpy ((char *) olddecl + sizeof (struct tree_common),
1977 (char *) newdecl + sizeof (struct tree_common),
1978 sizeof (struct tree_decl_common) - sizeof (struct tree_common));
1979 switch (TREE_CODE (olddecl))
1989 memcpy ((char *) olddecl + sizeof (struct tree_decl_common),
1990 (char *) newdecl + sizeof (struct tree_decl_common),
1991 size - sizeof (struct tree_decl_common)
1992 + TREE_CODE_LENGTH (TREE_CODE (newdecl)) * sizeof (char *));
1996 memcpy ((char *) olddecl + sizeof (struct tree_decl_common),
1997 (char *) newdecl + sizeof (struct tree_decl_common),
1998 sizeof (struct tree_decl_non_common) - sizeof (struct tree_decl_common)
1999 + TREE_CODE_LENGTH (TREE_CODE (newdecl)) * sizeof (char *));
2003 DECL_UID (olddecl) = olddecl_uid;
2005 DECL_FRIEND_P (olddecl) = 1;
2008 DECL_ANTICIPATED (olddecl) = 1;
2009 DECL_HIDDEN_FRIEND_P (olddecl) = 1;
2012 /* NEWDECL contains the merged attribute lists.
2013 Update OLDDECL to be the same. */
2014 DECL_ATTRIBUTES (olddecl) = DECL_ATTRIBUTES (newdecl);
2016 /* If OLDDECL had its DECL_RTL instantiated, re-invoke make_decl_rtl
2017 so that encode_section_info has a chance to look at the new decl
2018 flags and attributes. */
2019 if (DECL_RTL_SET_P (olddecl)
2020 && (TREE_CODE (olddecl) == FUNCTION_DECL
2021 || (TREE_CODE (olddecl) == VAR_DECL
2022 && TREE_STATIC (olddecl))))
2023 make_decl_rtl (olddecl);
2025 /* The NEWDECL will no longer be needed. Because every out-of-class
2026 declaration of a member results in a call to duplicate_decls,
2027 freeing these nodes represents in a significant savings. */
2033 /* Return zero if the declaration NEWDECL is valid
2034 when the declaration OLDDECL (assumed to be for the same name)
2035 has already been seen.
2036 Otherwise return an error message format string with a %s
2037 where the identifier should go. */
2040 redeclaration_error_message (tree newdecl, tree olddecl)
2042 if (TREE_CODE (newdecl) == TYPE_DECL)
2044 /* Because C++ can put things into name space for free,
2045 constructs like "typedef struct foo { ... } foo"
2046 would look like an erroneous redeclaration. */
2047 if (same_type_p (TREE_TYPE (newdecl), TREE_TYPE (olddecl)))
2050 return "redefinition of %q#D";
2052 else if (TREE_CODE (newdecl) == FUNCTION_DECL)
2054 /* If this is a pure function, its olddecl will actually be
2055 the original initialization to `0' (which we force to call
2056 abort()). Don't complain about redefinition in this case. */
2057 if (DECL_LANG_SPECIFIC (olddecl) && DECL_PURE_VIRTUAL_P (olddecl)
2058 && DECL_INITIAL (olddecl) == NULL_TREE)
2061 /* If both functions come from different namespaces, this is not
2062 a redeclaration - this is a conflict with a used function. */
2063 if (DECL_NAMESPACE_SCOPE_P (olddecl)
2064 && DECL_CONTEXT (olddecl) != DECL_CONTEXT (newdecl)
2065 && ! decls_match (olddecl, newdecl))
2066 return "%qD conflicts with used function";
2068 /* We'll complain about linkage mismatches in
2069 warn_extern_redeclared_static. */
2071 /* Defining the same name twice is no good. */
2072 if (DECL_INITIAL (olddecl) != NULL_TREE
2073 && DECL_INITIAL (newdecl) != NULL_TREE)
2075 if (DECL_NAME (olddecl) == NULL_TREE)
2076 return "%q#D not declared in class";
2078 return "redefinition of %q#D";
2082 else if (TREE_CODE (newdecl) == TEMPLATE_DECL)
2086 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == TYPE_DECL)
2088 if (COMPLETE_TYPE_P (TREE_TYPE (newdecl))
2089 && COMPLETE_TYPE_P (TREE_TYPE (olddecl)))
2090 return "redefinition of %q#D";
2094 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) != FUNCTION_DECL
2095 || (DECL_TEMPLATE_RESULT (newdecl)
2096 == DECL_TEMPLATE_RESULT (olddecl)))
2099 nt = DECL_TEMPLATE_RESULT (newdecl);
2100 if (DECL_TEMPLATE_INFO (nt))
2101 nt = DECL_TEMPLATE_RESULT (template_for_substitution (nt));
2102 ot = DECL_TEMPLATE_RESULT (olddecl);
2103 if (DECL_TEMPLATE_INFO (ot))
2104 ot = DECL_TEMPLATE_RESULT (template_for_substitution (ot));
2105 if (DECL_INITIAL (nt) && DECL_INITIAL (ot))
2106 return "redefinition of %q#D";
2110 else if (TREE_CODE (newdecl) == VAR_DECL
2111 && DECL_THREAD_LOCAL_P (newdecl) != DECL_THREAD_LOCAL_P (olddecl)
2112 && (! DECL_LANG_SPECIFIC (olddecl)
2113 || ! CP_DECL_THREADPRIVATE_P (olddecl)
2114 || DECL_THREAD_LOCAL_P (newdecl)))
2116 /* Only variables can be thread-local, and all declarations must
2117 agree on this property. */
2118 if (DECL_THREAD_LOCAL_P (newdecl))
2119 return "thread-local declaration of %q#D follows "
2120 "non-thread-local declaration";
2122 return "non-thread-local declaration of %q#D follows "
2123 "thread-local declaration";
2125 else if (toplevel_bindings_p () || DECL_NAMESPACE_SCOPE_P (newdecl))
2127 /* Objects declared at top level: */
2128 /* If at least one is a reference, it's ok. */
2129 if (DECL_EXTERNAL (newdecl) || DECL_EXTERNAL (olddecl))
2131 /* Reject two definitions. */
2132 return "redefinition of %q#D";
2136 /* Objects declared with block scope: */
2137 /* Reject two definitions, and reject a definition
2138 together with an external reference. */
2139 if (!(DECL_EXTERNAL (newdecl) && DECL_EXTERNAL (olddecl)))
2140 return "redeclaration of %q#D";
2145 /* Hash and equality functions for the named_label table. */
2148 named_label_entry_hash (const void *data)
2150 const struct named_label_entry *ent = (const struct named_label_entry *) data;
2151 return DECL_UID (ent->label_decl);
2155 named_label_entry_eq (const void *a, const void *b)
2157 const struct named_label_entry *ent_a = (const struct named_label_entry *) a;
2158 const struct named_label_entry *ent_b = (const struct named_label_entry *) b;
2159 return ent_a->label_decl == ent_b->label_decl;
2162 /* Create a new label, named ID. */
2165 make_label_decl (tree id, int local_p)
2167 struct named_label_entry *ent;
2171 decl = build_decl (LABEL_DECL, id, void_type_node);
2173 DECL_CONTEXT (decl) = current_function_decl;
2174 DECL_MODE (decl) = VOIDmode;
2175 C_DECLARED_LABEL_FLAG (decl) = local_p;
2177 /* Say where one reference is to the label, for the sake of the
2178 error if it is not defined. */
2179 DECL_SOURCE_LOCATION (decl) = input_location;
2181 /* Record the fact that this identifier is bound to this label. */
2182 SET_IDENTIFIER_LABEL_VALUE (id, decl);
2184 /* Create the label htab for the function on demand. */
2186 named_labels = htab_create_ggc (13, named_label_entry_hash,
2187 named_label_entry_eq, NULL);
2189 /* Record this label on the list of labels used in this function.
2190 We do this before calling make_label_decl so that we get the
2191 IDENTIFIER_LABEL_VALUE before the new label is declared. */
2192 ent = GGC_CNEW (struct named_label_entry);
2193 ent->label_decl = decl;
2195 slot = htab_find_slot (named_labels, ent, INSERT);
2196 gcc_assert (*slot == NULL);
2202 /* Look for a label named ID in the current function. If one cannot
2203 be found, create one. (We keep track of used, but undefined,
2204 labels, and complain about them at the end of a function.) */
2207 lookup_label (tree id)
2211 timevar_push (TV_NAME_LOOKUP);
2212 /* You can't use labels at global scope. */
2213 if (current_function_decl == NULL_TREE)
2215 error ("label %qE referenced outside of any function", id);
2216 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, NULL_TREE);
2219 /* See if we've already got this label. */
2220 decl = IDENTIFIER_LABEL_VALUE (id);
2221 if (decl != NULL_TREE && DECL_CONTEXT (decl) == current_function_decl)
2222 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, decl);
2224 decl = make_label_decl (id, /*local_p=*/0);
2225 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, decl);
2228 /* Declare a local label named ID. */
2231 declare_local_label (tree id)
2235 /* Add a new entry to the SHADOWED_LABELS list so that when we leave
2236 this scope we can restore the old value of IDENTIFIER_TYPE_VALUE. */
2237 shadow = tree_cons (IDENTIFIER_LABEL_VALUE (id), NULL_TREE,
2238 current_binding_level->shadowed_labels);
2239 current_binding_level->shadowed_labels = shadow;
2241 decl = make_label_decl (id, /*local_p=*/1);
2242 TREE_VALUE (shadow) = decl;
2247 /* Returns nonzero if it is ill-formed to jump past the declaration of
2248 DECL. Returns 2 if it's also a real problem. */
2251 decl_jump_unsafe (tree decl)
2253 if (TREE_CODE (decl) != VAR_DECL || TREE_STATIC (decl)
2254 || TREE_TYPE (decl) == error_mark_node)
2257 if (TYPE_NEEDS_CONSTRUCTING (TREE_TYPE (decl))
2258 || DECL_NONTRIVIALLY_INITIALIZED_P (decl))
2261 if (pod_type_p (TREE_TYPE (decl)))
2264 /* The POD stuff is just pedantry; why should it matter if the class
2265 contains a field of pointer to member type? */
2269 /* A subroutine of check_previous_goto_1 to identify a branch to the user. */
2272 identify_goto (tree decl, const location_t *locus)
2275 pedwarn ("jump to label %qD", decl);
2277 pedwarn ("jump to case label");
2279 pedwarn ("%H from here", locus);
2282 /* Check that a single previously seen jump to a newly defined label
2283 is OK. DECL is the LABEL_DECL or 0; LEVEL is the binding_level for
2284 the jump context; NAMES are the names in scope in LEVEL at the jump
2285 context; LOCUS is the source position of the jump or 0. Returns
2286 true if all is well. */
2289 check_previous_goto_1 (tree decl, struct cp_binding_level* level, tree names,
2290 bool exited_omp, const location_t *locus)
2292 struct cp_binding_level *b;
2293 bool identified = false, saw_eh = false, saw_omp = false;
2297 identify_goto (decl, locus);
2298 error (" exits OpenMP structured block");
2299 identified = saw_omp = true;
2302 for (b = current_binding_level; b ; b = b->level_chain)
2304 tree new_decls, old_decls = (b == level ? names : NULL_TREE);
2306 for (new_decls = b->names; new_decls != old_decls;
2307 new_decls = TREE_CHAIN (new_decls))
2309 int problem = decl_jump_unsafe (new_decls);
2315 identify_goto (decl, locus);
2319 error (" crosses initialization of %q+#D", new_decls);
2321 pedwarn (" enters scope of non-POD %q+#D", new_decls);
2326 if ((b->kind == sk_try || b->kind == sk_catch) && !saw_eh)
2330 identify_goto (decl, locus);
2333 if (b->kind == sk_try)
2334 error (" enters try block");
2336 error (" enters catch block");
2339 if (b->kind == sk_omp && !saw_omp)
2343 identify_goto (decl, locus);
2346 error (" enters OpenMP structured block");
2355 check_previous_goto (tree decl, struct named_label_use_entry *use)
2357 check_previous_goto_1 (decl, use->binding_level,
2358 use->names_in_scope, use->in_omp_scope,
2359 &use->o_goto_locus);
2363 check_switch_goto (struct cp_binding_level* level)
2365 return check_previous_goto_1 (NULL_TREE, level, level->names, false, NULL);
2368 /* Check that a new jump to a label DECL is OK. Called by
2369 finish_goto_stmt. */
2372 check_goto (tree decl)
2374 struct named_label_entry *ent, dummy;
2375 bool saw_catch = false, identified = false;
2378 /* We can't know where a computed goto is jumping.
2379 So we assume that it's OK. */
2380 if (TREE_CODE (decl) != LABEL_DECL)
2383 /* We didn't record any information about this label when we created it,
2384 and there's not much point since it's trivial to analyze as a return. */
2385 if (decl == cdtor_label)
2388 dummy.label_decl = decl;
2389 ent = (struct named_label_entry *) htab_find (named_labels, &dummy);
2390 gcc_assert (ent != NULL);
2392 /* If the label hasn't been defined yet, defer checking. */
2393 if (! DECL_INITIAL (decl))
2395 struct named_label_use_entry *new_use;
2397 /* Don't bother creating another use if the last goto had the
2398 same data, and will therefore create the same set of errors. */
2400 && ent->uses->names_in_scope == current_binding_level->names)
2403 new_use = GGC_NEW (struct named_label_use_entry);
2404 new_use->binding_level = current_binding_level;
2405 new_use->names_in_scope = current_binding_level->names;
2406 new_use->o_goto_locus = input_location;
2407 new_use->in_omp_scope = false;
2409 new_use->next = ent->uses;
2410 ent->uses = new_use;
2414 if (ent->in_try_scope || ent->in_catch_scope
2415 || ent->in_omp_scope || ent->bad_decls)
2417 pedwarn ("jump to label %q+D", decl);
2418 pedwarn (" from here");
2422 for (bad = ent->bad_decls; bad; bad = TREE_CHAIN (bad))
2424 tree b = TREE_VALUE (bad);
2425 int u = decl_jump_unsafe (b);
2427 if (u > 1 && DECL_ARTIFICIAL (b))
2429 /* Can't skip init of __exception_info. */
2430 error ("%J enters catch block", b);
2434 error (" skips initialization of %q+#D", b);
2436 pedwarn (" enters scope of non-POD %q+#D", b);
2439 if (ent->in_try_scope)
2440 error (" enters try block");
2441 else if (ent->in_catch_scope && !saw_catch)
2442 error (" enters catch block");
2444 if (ent->in_omp_scope)
2445 error (" enters OpenMP structured block");
2446 else if (flag_openmp)
2448 struct cp_binding_level *b;
2449 for (b = current_binding_level; b ; b = b->level_chain)
2451 if (b == ent->binding_level)
2453 if (b->kind == sk_omp)
2457 pedwarn ("jump to label %q+D", decl);
2458 pedwarn (" from here");
2461 error (" exits OpenMP structured block");
2468 /* Check that a return is ok wrt OpenMP structured blocks.
2469 Called by finish_return_stmt. Returns true if all is well. */
2472 check_omp_return (void)
2474 struct cp_binding_level *b;
2475 for (b = current_binding_level; b ; b = b->level_chain)
2476 if (b->kind == sk_omp)
2478 error ("invalid exit from OpenMP structured block");
2484 /* Define a label, specifying the location in the source file.
2485 Return the LABEL_DECL node for the label. */
2488 define_label (location_t location, tree name)
2490 struct named_label_entry *ent, dummy;
2491 struct cp_binding_level *p;
2494 timevar_push (TV_NAME_LOOKUP);
2496 decl = lookup_label (name);
2498 dummy.label_decl = decl;
2499 ent = (struct named_label_entry *) htab_find (named_labels, &dummy);
2500 gcc_assert (ent != NULL);
2502 /* After labels, make any new cleanups in the function go into their
2503 own new (temporary) binding contour. */
2504 for (p = current_binding_level;
2505 p->kind != sk_function_parms;
2507 p->more_cleanups_ok = 0;
2509 if (name == get_identifier ("wchar_t"))
2510 pedwarn ("label named wchar_t");
2512 if (DECL_INITIAL (decl) != NULL_TREE)
2513 error ("duplicate label %qD", decl);
2516 struct named_label_use_entry *use;
2518 /* Mark label as having been defined. */
2519 DECL_INITIAL (decl) = error_mark_node;
2520 /* Say where in the source. */
2521 DECL_SOURCE_LOCATION (decl) = location;
2523 ent->binding_level = current_binding_level;
2524 ent->names_in_scope = current_binding_level->names;
2526 for (use = ent->uses; use ; use = use->next)
2527 check_previous_goto (decl, use);
2531 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, decl);
2536 struct cp_binding_level *level;
2537 struct cp_switch *next;
2538 /* The SWITCH_STMT being built. */
2540 /* A splay-tree mapping the low element of a case range to the high
2541 element, or NULL_TREE if there is no high element. Used to
2542 determine whether or not a new case label duplicates an old case
2543 label. We need a tree, rather than simply a hash table, because
2544 of the GNU case range extension. */
2548 /* A stack of the currently active switch statements. The innermost
2549 switch statement is on the top of the stack. There is no need to
2550 mark the stack for garbage collection because it is only active
2551 during the processing of the body of a function, and we never
2552 collect at that point. */
2554 static struct cp_switch *switch_stack;
2556 /* Called right after a switch-statement condition is parsed.
2557 SWITCH_STMT is the switch statement being parsed. */
2560 push_switch (tree switch_stmt)
2562 struct cp_switch *p = XNEW (struct cp_switch);
2563 p->level = current_binding_level;
2564 p->next = switch_stack;
2565 p->switch_stmt = switch_stmt;
2566 p->cases = splay_tree_new (case_compare, NULL, NULL);
2573 struct cp_switch *cs = switch_stack;
2574 location_t switch_location;
2576 /* Emit warnings as needed. */
2577 if (EXPR_HAS_LOCATION (cs->switch_stmt))
2578 switch_location = EXPR_LOCATION (cs->switch_stmt);
2580 switch_location = input_location;
2581 if (!processing_template_decl)
2582 c_do_switch_warnings (cs->cases, switch_location,
2583 SWITCH_STMT_TYPE (cs->switch_stmt),
2584 SWITCH_STMT_COND (cs->switch_stmt));
2586 splay_tree_delete (cs->cases);
2587 switch_stack = switch_stack->next;
2591 /* Note that we've seen a definition of a case label, and complain if this
2592 is a bad place for one. */
2595 finish_case_label (tree low_value, tree high_value)
2598 struct cp_binding_level *p;
2600 if (processing_template_decl)
2604 /* For templates, just add the case label; we'll do semantic
2605 analysis at instantiation-time. */
2606 label = build_decl (LABEL_DECL, NULL_TREE, NULL_TREE);
2607 return add_stmt (build_case_label (low_value, high_value, label));
2610 /* Find the condition on which this switch statement depends. */
2611 cond = SWITCH_STMT_COND (switch_stack->switch_stmt);
2612 if (cond && TREE_CODE (cond) == TREE_LIST)
2613 cond = TREE_VALUE (cond);
2615 if (!check_switch_goto (switch_stack->level))
2616 return error_mark_node;
2618 r = c_add_case_label (switch_stack->cases, cond, TREE_TYPE (cond),
2619 low_value, high_value);
2621 /* After labels, make any new cleanups in the function go into their
2622 own new (temporary) binding contour. */
2623 for (p = current_binding_level;
2624 p->kind != sk_function_parms;
2626 p->more_cleanups_ok = 0;
2631 /* Hash a TYPENAME_TYPE. K is really of type `tree'. */
2634 typename_hash (const void* k)
2639 hash = (htab_hash_pointer (TYPE_CONTEXT (t))
2640 ^ htab_hash_pointer (DECL_NAME (TYPE_NAME (t))));
2645 typedef struct typename_info {
2653 /* Compare two TYPENAME_TYPEs. K1 and K2 are really of type `tree'. */
2656 typename_compare (const void * k1, const void * k2)
2659 const typename_info *t2;
2662 t2 = (const typename_info *) k2;
2664 return (DECL_NAME (TYPE_NAME (t1)) == t2->name
2665 && TYPE_CONTEXT (t1) == t2->scope
2666 && TYPENAME_TYPE_FULLNAME (t1) == t2->template_id
2667 && TYPENAME_IS_ENUM_P (t1) == t2->enum_p
2668 && TYPENAME_IS_CLASS_P (t1) == t2->class_p);
2671 /* Build a TYPENAME_TYPE. If the type is `typename T::t', CONTEXT is
2672 the type of `T', NAME is the IDENTIFIER_NODE for `t'.
2674 Returns the new TYPENAME_TYPE. */
2676 static GTY ((param_is (union tree_node))) htab_t typename_htab;
2679 build_typename_type (tree context, tree name, tree fullname,
2680 enum tag_types tag_type)
2688 if (typename_htab == NULL)
2689 typename_htab = htab_create_ggc (61, &typename_hash,
2690 &typename_compare, NULL);
2692 ti.scope = FROB_CONTEXT (context);
2694 ti.template_id = fullname;
2695 ti.enum_p = tag_type == enum_type;
2696 ti.class_p = (tag_type == class_type
2697 || tag_type == record_type
2698 || tag_type == union_type);
2699 hash = (htab_hash_pointer (ti.scope)
2700 ^ htab_hash_pointer (ti.name));
2702 /* See if we already have this type. */
2703 e = htab_find_slot_with_hash (typename_htab, &ti, hash, INSERT);
2708 /* Build the TYPENAME_TYPE. */
2709 t = make_aggr_type (TYPENAME_TYPE);
2710 TYPE_CONTEXT (t) = ti.scope;
2711 TYPENAME_TYPE_FULLNAME (t) = ti.template_id;
2712 TYPENAME_IS_ENUM_P (t) = ti.enum_p;
2713 TYPENAME_IS_CLASS_P (t) = ti.class_p;
2715 /* Build the corresponding TYPE_DECL. */
2716 d = build_decl (TYPE_DECL, name, t);
2717 TYPE_NAME (TREE_TYPE (d)) = d;
2718 TYPE_STUB_DECL (TREE_TYPE (d)) = d;
2719 DECL_CONTEXT (d) = FROB_CONTEXT (context);
2720 DECL_ARTIFICIAL (d) = 1;
2722 /* Store it in the hash table. */
2729 /* Resolve `typename CONTEXT::NAME'. TAG_TYPE indicates the tag
2730 provided to name the type. Returns an appropriate type, unless an
2731 error occurs, in which case error_mark_node is returned. If we
2732 locate a non-artificial TYPE_DECL and TF_KEEP_TYPE_DECL is set, we
2733 return that, rather than the _TYPE it corresponds to, in other
2734 cases we look through the type decl. If TF_ERROR is set, complain
2735 about errors, otherwise be quiet. */
2738 make_typename_type (tree context, tree name, enum tag_types tag_type,
2739 tsubst_flags_t complain)
2743 if (name == error_mark_node
2744 || context == NULL_TREE
2745 || context == error_mark_node)
2746 return error_mark_node;
2750 if (!(TYPE_LANG_SPECIFIC (name)
2751 && (CLASSTYPE_IS_TEMPLATE (name)
2752 || CLASSTYPE_USE_TEMPLATE (name))))
2753 name = TYPE_IDENTIFIER (name);
2755 /* Create a TEMPLATE_ID_EXPR for the type. */
2756 name = build_nt (TEMPLATE_ID_EXPR,
2757 CLASSTYPE_TI_TEMPLATE (name),
2758 CLASSTYPE_TI_ARGS (name));
2760 else if (TREE_CODE (name) == TYPE_DECL)
2761 name = DECL_NAME (name);
2765 if (TREE_CODE (name) == TEMPLATE_ID_EXPR)
2767 name = TREE_OPERAND (name, 0);
2768 if (TREE_CODE (name) == TEMPLATE_DECL)
2769 name = TREE_OPERAND (fullname, 0) = DECL_NAME (name);
2771 if (TREE_CODE (name) == TEMPLATE_DECL)
2773 error ("%qD used without template parameters", name);
2774 return error_mark_node;
2776 gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE);
2777 gcc_assert (TYPE_P (context));
2779 if (!dependent_type_p (context)
2780 || currently_open_class (context))
2782 if (TREE_CODE (fullname) == TEMPLATE_ID_EXPR)
2784 tree tmpl = NULL_TREE;
2785 if (IS_AGGR_TYPE (context))
2786 tmpl = lookup_field (context, name, 0, false);
2787 if (!tmpl || !DECL_CLASS_TEMPLATE_P (tmpl))
2789 if (complain & tf_error)
2790 error ("no class template named %q#T in %q#T",
2792 return error_mark_node;
2795 if (complain & tf_error)
2796 perform_or_defer_access_check (TYPE_BINFO (context), tmpl);
2798 return lookup_template_class (tmpl,
2799 TREE_OPERAND (fullname, 1),
2801 /*entering_scope=*/0,
2802 tf_warning_or_error | tf_user);
2808 if (!IS_AGGR_TYPE (context))
2810 if (complain & tf_error)
2811 error ("no type named %q#T in %q#T", name, context);
2812 return error_mark_node;
2815 t = lookup_field (context, name, 0, true);
2818 if (TREE_CODE (t) != TYPE_DECL)
2820 if (complain & tf_error)
2821 error ("no type named %q#T in %q#T", name, context);
2822 return error_mark_node;
2825 if (complain & tf_error)
2826 perform_or_defer_access_check (TYPE_BINFO (context), t);
2828 if (DECL_ARTIFICIAL (t) || !(complain & tf_keep_type_decl))
2836 /* If the CONTEXT is not a template type, then either the field is
2837 there now or its never going to be. */
2838 if (!dependent_type_p (context))
2840 if (complain & tf_error)
2841 error ("no type named %q#T in %q#T", name, context);
2842 return error_mark_node;
2845 return build_typename_type (context, name, fullname, tag_type);
2848 /* Resolve `CONTEXT::template NAME'. Returns a TEMPLATE_DECL if the name
2849 can be resolved or an UNBOUND_CLASS_TEMPLATE, unless an error occurs,
2850 in which case error_mark_node is returned.
2852 If PARM_LIST is non-NULL, also make sure that the template parameter
2853 list of TEMPLATE_DECL matches.
2855 If COMPLAIN zero, don't complain about any errors that occur. */
2858 make_unbound_class_template (tree context, tree name, tree parm_list,
2859 tsubst_flags_t complain)
2865 name = TYPE_IDENTIFIER (name);
2866 else if (DECL_P (name))
2867 name = DECL_NAME (name);
2868 gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE);
2870 if (!dependent_type_p (context)
2871 || currently_open_class (context))
2873 tree tmpl = NULL_TREE;
2875 if (IS_AGGR_TYPE (context))
2876 tmpl = lookup_field (context, name, 0, false);
2878 if (!tmpl || !DECL_CLASS_TEMPLATE_P (tmpl))
2880 if (complain & tf_error)
2881 error ("no class template named %q#T in %q#T", name, context);
2882 return error_mark_node;
2886 && !comp_template_parms (DECL_TEMPLATE_PARMS (tmpl), parm_list))
2888 if (complain & tf_error)
2890 error ("template parameters do not match template");
2891 error ("%q+D declared here", tmpl);
2893 return error_mark_node;
2896 if (complain & tf_error)
2897 perform_or_defer_access_check (TYPE_BINFO (context), tmpl);
2902 /* Build the UNBOUND_CLASS_TEMPLATE. */
2903 t = make_aggr_type (UNBOUND_CLASS_TEMPLATE);
2904 TYPE_CONTEXT (t) = FROB_CONTEXT (context);
2905 TREE_TYPE (t) = NULL_TREE;
2907 /* Build the corresponding TEMPLATE_DECL. */
2908 d = build_decl (TEMPLATE_DECL, name, t);
2909 TYPE_NAME (TREE_TYPE (d)) = d;
2910 TYPE_STUB_DECL (TREE_TYPE (d)) = d;
2911 DECL_CONTEXT (d) = FROB_CONTEXT (context);
2912 DECL_ARTIFICIAL (d) = 1;
2913 DECL_TEMPLATE_PARMS (d) = parm_list;
2920 /* Push the declarations of builtin types into the namespace.
2921 RID_INDEX is the index of the builtin type in the array
2922 RID_POINTERS. NAME is the name used when looking up the builtin
2923 type. TYPE is the _TYPE node for the builtin type. */
2926 record_builtin_type (enum rid rid_index,
2930 tree rname = NULL_TREE, tname = NULL_TREE;
2931 tree tdecl = NULL_TREE;
2933 if ((int) rid_index < (int) RID_MAX)
2934 rname = ridpointers[(int) rid_index];
2936 tname = get_identifier (name);
2938 /* The calls to SET_IDENTIFIER_GLOBAL_VALUE below should be
2939 eliminated. Built-in types should not be looked up name; their
2940 names are keywords that the parser can recognize. However, there
2941 is code in c-common.c that uses identifier_global_value to look
2942 up built-in types by name. */
2945 tdecl = build_decl (TYPE_DECL, tname, type);
2946 DECL_ARTIFICIAL (tdecl) = 1;
2947 SET_IDENTIFIER_GLOBAL_VALUE (tname, tdecl);
2953 tdecl = build_decl (TYPE_DECL, rname, type);
2954 DECL_ARTIFICIAL (tdecl) = 1;
2956 SET_IDENTIFIER_GLOBAL_VALUE (rname, tdecl);
2959 if (!TYPE_NAME (type))
2960 TYPE_NAME (type) = tdecl;
2963 debug_hooks->type_decl (tdecl, 0);
2966 /* Record one of the standard Java types.
2967 * Declare it as having the given NAME.
2968 * If SIZE > 0, it is the size of one of the integral types;
2969 * otherwise it is the negative of the size of one of the other types. */
2972 record_builtin_java_type (const char* name, int size)
2976 type = make_signed_type (size);
2977 else if (size > -32)
2978 { /* "__java_char" or ""__java_boolean". */
2979 type = make_unsigned_type (-size);
2980 /*if (size == -1) TREE_SET_CODE (type, BOOLEAN_TYPE);*/
2983 { /* "__java_float" or ""__java_double". */
2984 type = make_node (REAL_TYPE);
2985 TYPE_PRECISION (type) = - size;
2988 record_builtin_type (RID_MAX, name, type);
2989 decl = TYPE_NAME (type);
2991 /* Suppress generate debug symbol entries for these types,
2992 since for normal C++ they are just clutter.
2993 However, push_lang_context undoes this if extern "Java" is seen. */
2994 DECL_IGNORED_P (decl) = 1;
2996 TYPE_FOR_JAVA (type) = 1;
3000 /* Push a type into the namespace so that the back-ends ignore it. */
3003 record_unknown_type (tree type, const char* name)
3005 tree decl = pushdecl (build_decl (TYPE_DECL, get_identifier (name), type));
3006 /* Make sure the "unknown type" typedecl gets ignored for debug info. */
3007 DECL_IGNORED_P (decl) = 1;
3008 TYPE_DECL_SUPPRESS_DEBUG (decl) = 1;
3009 TYPE_SIZE (type) = TYPE_SIZE (void_type_node);
3010 TYPE_ALIGN (type) = 1;
3011 TYPE_USER_ALIGN (type) = 0;
3012 TYPE_MODE (type) = TYPE_MODE (void_type_node);
3015 /* A string for which we should create an IDENTIFIER_NODE at
3018 typedef struct predefined_identifier
3020 /* The name of the identifier. */
3021 const char *const name;
3022 /* The place where the IDENTIFIER_NODE should be stored. */
3024 /* Nonzero if this is the name of a constructor or destructor. */
3025 const int ctor_or_dtor_p;
3026 } predefined_identifier;
3028 /* Create all the predefined identifiers. */
3031 initialize_predefined_identifiers (void)
3033 const predefined_identifier *pid;
3035 /* A table of identifiers to create at startup. */
3036 static const predefined_identifier predefined_identifiers[] = {
3037 { "C++", &lang_name_cplusplus, 0 },
3038 { "C", &lang_name_c, 0 },
3039 { "Java", &lang_name_java, 0 },
3040 /* Some of these names have a trailing space so that it is
3041 impossible for them to conflict with names written by users. */
3042 { "__ct ", &ctor_identifier, 1 },
3043 { "__base_ctor ", &base_ctor_identifier, 1 },
3044 { "__comp_ctor ", &complete_ctor_identifier, 1 },
3045 { "__dt ", &dtor_identifier, 1 },
3046 { "__comp_dtor ", &complete_dtor_identifier, 1 },
3047 { "__base_dtor ", &base_dtor_identifier, 1 },
3048 { "__deleting_dtor ", &deleting_dtor_identifier, 1 },
3049 { IN_CHARGE_NAME, &in_charge_identifier, 0 },
3050 { "nelts", &nelts_identifier, 0 },
3051 { THIS_NAME, &this_identifier, 0 },
3052 { VTABLE_DELTA_NAME, &delta_identifier, 0 },
3053 { VTABLE_PFN_NAME, &pfn_identifier, 0 },
3054 { "_vptr", &vptr_identifier, 0 },
3055 { "__vtt_parm", &vtt_parm_identifier, 0 },
3056 { "::", &global_scope_name, 0 },
3057 { "std", &std_identifier, 0 },
3061 for (pid = predefined_identifiers; pid->name; ++pid)
3063 *pid->node = get_identifier (pid->name);
3064 if (pid->ctor_or_dtor_p)
3065 IDENTIFIER_CTOR_OR_DTOR_P (*pid->node) = 1;
3069 /* Create the predefined scalar types of C,
3070 and some nodes representing standard constants (0, 1, (void *)0).
3071 Initialize the global binding level.
3072 Make definitions for built-in primitive functions. */
3075 cxx_init_decl_processing (void)
3078 tree void_ftype_ptr;
3080 build_common_tree_nodes (flag_signed_char, false);
3082 /* Create all the identifiers we need. */
3083 initialize_predefined_identifiers ();
3085 /* Create the global variables. */
3086 push_to_top_level ();
3088 current_function_decl = NULL_TREE;
3089 current_binding_level = NULL;
3090 /* Enter the global namespace. */
3091 gcc_assert (global_namespace == NULL_TREE);
3092 global_namespace = build_lang_decl (NAMESPACE_DECL, global_scope_name,
3094 begin_scope (sk_namespace, global_namespace);
3096 current_lang_name = NULL_TREE;
3098 /* Adjust various flags based on command-line settings. */
3099 if (!flag_permissive)
3100 flag_pedantic_errors = 1;
3101 if (!flag_no_inline)
3103 flag_inline_trees = 1;
3106 if (flag_inline_functions)
3107 flag_inline_trees = 2;
3109 /* Force minimum function alignment if using the least significant
3110 bit of function pointers to store the virtual bit. */
3111 if (TARGET_PTRMEMFUNC_VBIT_LOCATION == ptrmemfunc_vbit_in_pfn
3112 && force_align_functions_log < 1)
3113 force_align_functions_log = 1;
3116 current_lang_name = lang_name_c;
3118 /* Create the `std' namespace. */
3119 push_namespace (std_identifier);
3120 std_node = current_namespace;
3123 c_common_nodes_and_builtins ();
3125 java_byte_type_node = record_builtin_java_type ("__java_byte", 8);
3126 java_short_type_node = record_builtin_java_type ("__java_short", 16);
3127 java_int_type_node = record_builtin_java_type ("__java_int", 32);
3128 java_long_type_node = record_builtin_java_type ("__java_long", 64);
3129 java_float_type_node = record_builtin_java_type ("__java_float", -32);
3130 java_double_type_node = record_builtin_java_type ("__java_double", -64);
3131 java_char_type_node = record_builtin_java_type ("__java_char", -16);
3132 java_boolean_type_node = record_builtin_java_type ("__java_boolean", -1);
3134 integer_two_node = build_int_cst (NULL_TREE, 2);
3135 integer_three_node = build_int_cst (NULL_TREE, 3);
3137 record_builtin_type (RID_BOOL, "bool", boolean_type_node);
3138 truthvalue_type_node = boolean_type_node;
3139 truthvalue_false_node = boolean_false_node;
3140 truthvalue_true_node = boolean_true_node;
3142 empty_except_spec = build_tree_list (NULL_TREE, NULL_TREE);
3145 record_builtin_type (RID_MAX, NULL, string_type_node);
3148 delta_type_node = ptrdiff_type_node;
3149 vtable_index_type = ptrdiff_type_node;
3151 vtt_parm_type = build_pointer_type (const_ptr_type_node);
3152 void_ftype = build_function_type (void_type_node, void_list_node);
3153 void_ftype_ptr = build_function_type (void_type_node,
3154 tree_cons (NULL_TREE,
3158 = build_exception_variant (void_ftype_ptr, empty_except_spec);
3160 /* C++ extensions */
3162 unknown_type_node = make_node (UNKNOWN_TYPE);
3163 record_unknown_type (unknown_type_node, "unknown type");
3165 /* Indirecting an UNKNOWN_TYPE node yields an UNKNOWN_TYPE node. */
3166 TREE_TYPE (unknown_type_node) = unknown_type_node;
3168 /* Looking up TYPE_POINTER_TO and TYPE_REFERENCE_TO yield the same
3170 TYPE_POINTER_TO (unknown_type_node) = unknown_type_node;
3171 TYPE_REFERENCE_TO (unknown_type_node) = unknown_type_node;
3174 /* Make sure we get a unique function type, so we can give
3175 its pointer type a name. (This wins for gdb.) */
3176 tree vfunc_type = make_node (FUNCTION_TYPE);
3177 TREE_TYPE (vfunc_type) = integer_type_node;
3178 TYPE_ARG_TYPES (vfunc_type) = NULL_TREE;
3179 layout_type (vfunc_type);
3181 vtable_entry_type = build_pointer_type (vfunc_type);
3183 record_builtin_type (RID_MAX, VTBL_PTR_TYPE, vtable_entry_type);
3186 = build_cplus_array_type (vtable_entry_type, NULL_TREE);
3187 layout_type (vtbl_type_node);
3188 vtbl_type_node = build_qualified_type (vtbl_type_node, TYPE_QUAL_CONST);
3189 record_builtin_type (RID_MAX, NULL, vtbl_type_node);
3190 vtbl_ptr_type_node = build_pointer_type (vtable_entry_type);
3191 layout_type (vtbl_ptr_type_node);
3192 record_builtin_type (RID_MAX, NULL, vtbl_ptr_type_node);
3194 push_namespace (get_identifier ("__cxxabiv1"));
3195 abi_node = current_namespace;
3198 global_type_node = make_node (LANG_TYPE);
3199 record_unknown_type (global_type_node, "global type");
3202 current_lang_name = lang_name_cplusplus;
3206 tree bad_alloc_type_node;
3207 tree bad_alloc_decl;
3208 tree newtype, deltype;
3209 tree ptr_ftype_sizetype;
3211 push_namespace (std_identifier);
3212 bad_alloc_id = get_identifier ("bad_alloc");
3213 bad_alloc_type_node = make_aggr_type (RECORD_TYPE);
3214 TYPE_CONTEXT (bad_alloc_type_node) = current_namespace;
3216 = create_implicit_typedef (bad_alloc_id, bad_alloc_type_node);
3217 DECL_CONTEXT (bad_alloc_decl) = current_namespace;
3218 TYPE_STUB_DECL (bad_alloc_type_node) = bad_alloc_decl;
3222 = build_function_type (ptr_type_node,
3223 tree_cons (NULL_TREE,
3226 newtype = build_exception_variant
3227 (ptr_ftype_sizetype, add_exception_specifier
3228 (NULL_TREE, bad_alloc_type_node, -1));
3229 deltype = build_exception_variant (void_ftype_ptr, empty_except_spec);
3230 push_cp_library_fn (NEW_EXPR, newtype);
3231 push_cp_library_fn (VEC_NEW_EXPR, newtype);
3232 global_delete_fndecl = push_cp_library_fn (DELETE_EXPR, deltype);
3233 push_cp_library_fn (VEC_DELETE_EXPR, deltype);
3237 = build_library_fn_ptr ("__cxa_pure_virtual", void_ftype);
3239 /* Perform other language dependent initializations. */
3240 init_class_processing ();
3241 init_rtti_processing ();
3243 if (flag_exceptions)
3244 init_exception_processing ();
3246 if (! supports_one_only ())
3249 make_fname_decl = cp_make_fname_decl;
3250 start_fname_decls ();
3252 /* Show we use EH for cleanups. */
3253 if (flag_exceptions)
3254 using_eh_for_cleanups ();
3257 /* Generate an initializer for a function naming variable from
3258 NAME. NAME may be NULL, to indicate a dependent name. TYPE_P is
3259 filled in with the type of the init. */
3262 cp_fname_init (const char* name, tree *type_p)
3264 tree domain = NULL_TREE;
3266 tree init = NULL_TREE;
3271 length = strlen (name);
3272 domain = build_index_type (size_int (length));
3273 init = build_string (length + 1, name);
3276 type = build_qualified_type (char_type_node, TYPE_QUAL_CONST);
3277 type = build_cplus_array_type (type, domain);
3282 TREE_TYPE (init) = type;
3284 init = error_mark_node;
3289 /* Create the VAR_DECL for __FUNCTION__ etc. ID is the name to give the
3290 decl, NAME is the initialization string and TYPE_DEP indicates whether
3291 NAME depended on the type of the function. We make use of that to detect
3292 __PRETTY_FUNCTION__ inside a template fn. This is being done
3293 lazily at the point of first use, so we mustn't push the decl now. */
3296 cp_make_fname_decl (tree id, int type_dep)
3298 const char *const name = (type_dep && processing_template_decl
3299 ? NULL : fname_as_string (type_dep));
3301 tree init = cp_fname_init (name, &type);
3302 tree decl = build_decl (VAR_DECL, id, type);
3305 free ((char *) name);
3307 /* As we're using pushdecl_with_scope, we must set the context. */
3308 DECL_CONTEXT (decl) = current_function_decl;
3309 DECL_PRETTY_FUNCTION_P (decl) = type_dep;
3311 TREE_STATIC (decl) = 1;
3312 TREE_READONLY (decl) = 1;
3313 DECL_ARTIFICIAL (decl) = 1;
3314 DECL_INITIAL (decl) = init;
3316 TREE_USED (decl) = 1;
3318 if (current_function_decl)
3320 struct cp_binding_level *b = current_binding_level;
3321 while (b->level_chain->kind != sk_function_parms)
3323 pushdecl_with_scope (decl, b, /*is_friend=*/false);
3324 cp_finish_decl (decl, init, /*init_const_expr_p=*/false, NULL_TREE,
3325 LOOKUP_ONLYCONVERTING);
3328 pushdecl_top_level_and_finish (decl, init);
3333 /* Make a definition for a builtin function named NAME in the current
3334 namespace, whose data type is TYPE and whose context is CONTEXT.
3335 TYPE should be a function type with argument types.
3337 CLASS and CODE tell later passes how to compile calls to this function.
3338 See tree.h for possible values.
3340 If LIBNAME is nonzero, use that for DECL_ASSEMBLER_NAME,
3341 the name to be called if we can't opencode the function.
3342 If ATTRS is nonzero, use that for the function's attribute
3346 builtin_function_1 (const char* name,
3349 enum built_in_function code,
3350 enum built_in_class class,
3351 const char* libname,
3354 tree decl = build_library_fn_1 (get_identifier (name), ERROR_MARK, type);
3355 DECL_BUILT_IN_CLASS (decl) = class;
3356 DECL_FUNCTION_CODE (decl) = code;
3357 DECL_CONTEXT (decl) = context;
3361 /* Since `pushdecl' relies on DECL_ASSEMBLER_NAME instead of DECL_NAME,
3362 we cannot change DECL_ASSEMBLER_NAME until we have installed this
3363 function in the namespace. */
3365 SET_DECL_ASSEMBLER_NAME (decl, get_identifier (libname));
3367 /* A function in the user's namespace should have an explicit
3368 declaration before it is used. Mark the built-in function as
3369 anticipated but not actually declared. */
3370 if (name[0] != '_' || name[1] != '_')
3371 DECL_ANTICIPATED (decl) = 1;
3373 /* Possibly apply some default attributes to this built-in function. */
3375 decl_attributes (&decl, attrs, ATTR_FLAG_BUILT_IN);
3377 decl_attributes (&decl, NULL_TREE, 0);
3382 /* Entry point for the benefit of c_common_nodes_and_builtins.
3384 Make a definition for a builtin function named NAME and whose data type
3385 is TYPE. TYPE should be a function type with argument types. This
3386 function places the anticipated declaration in the global namespace
3387 and additionally in the std namespace if appropriate.
3389 CLASS and CODE tell later passes how to compile calls to this function.
3390 See tree.h for possible values.
3392 If LIBNAME is nonzero, use that for DECL_ASSEMBLER_NAME,
3393 the name to be called if we can't opencode the function.
3395 If ATTRS is nonzero, use that for the function's attribute
3399 builtin_function (const char* name,
3402 enum built_in_class cl,
3403 const char* libname,
3406 /* All builtins that don't begin with an '_' should additionally
3407 go in the 'std' namespace. */
3410 push_namespace (std_identifier);
3411 builtin_function_1 (name, type, std_node, code, cl, libname, attrs);
3415 return builtin_function_1 (name, type, NULL_TREE, code,
3416 cl, libname, attrs);
3419 /* Generate a FUNCTION_DECL with the typical flags for a runtime library
3420 function. Not called directly. */
3423 build_library_fn_1 (tree name, enum tree_code operator_code, tree type)
3425 tree fn = build_lang_decl (FUNCTION_DECL, name, type);
3426 DECL_EXTERNAL (fn) = 1;
3427 TREE_PUBLIC (fn) = 1;
3428 DECL_ARTIFICIAL (fn) = 1;
3429 SET_OVERLOADED_OPERATOR_CODE (fn, operator_code);
3430 SET_DECL_LANGUAGE (fn, lang_c);
3431 /* Runtime library routines are, by definition, available in an
3432 external shared object. */
3433 DECL_VISIBILITY (fn) = VISIBILITY_DEFAULT;
3434 DECL_VISIBILITY_SPECIFIED (fn) = 1;
3438 /* Returns the _DECL for a library function with C linkage.
3439 We assume that such functions never throw; if this is incorrect,
3440 callers should unset TREE_NOTHROW. */
3443 build_library_fn (tree name, tree type)
3445 tree fn = build_library_fn_1 (name, ERROR_MARK, type);
3446 TREE_NOTHROW (fn) = 1;
3450 /* Returns the _DECL for a library function with C++ linkage. */
3453 build_cp_library_fn (tree name, enum tree_code operator_code, tree type)
3455 tree fn = build_library_fn_1 (name, operator_code, type);
3456 TREE_NOTHROW (fn) = TYPE_NOTHROW_P (type);
3457 DECL_CONTEXT (fn) = FROB_CONTEXT (current_namespace);
3458 SET_DECL_LANGUAGE (fn, lang_cplusplus);
3462 /* Like build_library_fn, but takes a C string instead of an
3466 build_library_fn_ptr (const char* name, tree type)
3468 return build_library_fn (get_identifier (name), type);
3471 /* Like build_cp_library_fn, but takes a C string instead of an
3475 build_cp_library_fn_ptr (const char* name, tree type)
3477 return build_cp_library_fn (get_identifier (name), ERROR_MARK, type);
3480 /* Like build_library_fn, but also pushes the function so that we will
3481 be able to find it via IDENTIFIER_GLOBAL_VALUE. */
3484 push_library_fn (tree name, tree type)
3486 tree fn = build_library_fn (name, type);
3487 pushdecl_top_level (fn);
3491 /* Like build_cp_library_fn, but also pushes the function so that it
3492 will be found by normal lookup. */
3495 push_cp_library_fn (enum tree_code operator_code, tree type)
3497 tree fn = build_cp_library_fn (ansi_opname (operator_code),
3504 /* Like push_library_fn, but takes a TREE_LIST of parm types rather than
3508 push_void_library_fn (tree name, tree parmtypes)
3510 tree type = build_function_type (void_type_node, parmtypes);
3511 return push_library_fn (name, type);
3514 /* Like push_library_fn, but also note that this function throws
3515 and does not return. Used for __throw_foo and the like. */
3518 push_throw_library_fn (tree name, tree type)
3520 tree fn = push_library_fn (name, type);
3521 TREE_THIS_VOLATILE (fn) = 1;
3522 TREE_NOTHROW (fn) = 0;
3526 /* When we call finish_struct for an anonymous union, we create
3527 default copy constructors and such. But, an anonymous union
3528 shouldn't have such things; this function undoes the damage to the
3529 anonymous union type T.
3531 (The reason that we create the synthesized methods is that we don't
3532 distinguish `union { int i; }' from `typedef union { int i; } U'.
3533 The first is an anonymous union; the second is just an ordinary
3537 fixup_anonymous_aggr (tree t)
3541 /* Wipe out memory of synthesized methods. */
3542 TYPE_HAS_CONSTRUCTOR (t) = 0;
3543 TYPE_HAS_DEFAULT_CONSTRUCTOR (t) = 0;
3544 TYPE_HAS_INIT_REF (t) = 0;
3545 TYPE_HAS_CONST_INIT_REF (t) = 0;
3546 TYPE_HAS_ASSIGN_REF (t) = 0;
3547 TYPE_HAS_CONST_ASSIGN_REF (t) = 0;
3549 /* Splice the implicitly generated functions out of the TYPE_METHODS
3551 q = &TYPE_METHODS (t);
3554 if (DECL_ARTIFICIAL (*q))
3555 *q = TREE_CHAIN (*q);
3557 q = &TREE_CHAIN (*q);
3560 /* ISO C++ 9.5.3. Anonymous unions may not have function members. */
3561 if (TYPE_METHODS (t))
3562 error ("%Jan anonymous union cannot have function members",
3563 TYPE_MAIN_DECL (t));
3565 /* Anonymous aggregates cannot have fields with ctors, dtors or complex
3566 assignment operators (because they cannot have these methods themselves).
3567 For anonymous unions this is already checked because they are not allowed
3568 in any union, otherwise we have to check it. */
3569 if (TREE_CODE (t) != UNION_TYPE)
3573 for (field = TYPE_FIELDS (t); field; field = TREE_CHAIN (field))
3574 if (TREE_CODE (field) == FIELD_DECL)
3576 type = TREE_TYPE (field);
3577 if (CLASS_TYPE_P (type))
3579 if (TYPE_NEEDS_CONSTRUCTING (type))
3580 error ("member %q+#D with constructor not allowed "
3581 "in anonymous aggregate", field);
3582 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type))
3583 error ("member %q+#D with destructor not allowed "
3584 "in anonymous aggregate", field);
3585 if (TYPE_HAS_COMPLEX_ASSIGN_REF (type))
3586 error ("member %q+#D with copy assignment operator "
3587 "not allowed in anonymous aggregate", field);
3593 /* Make sure that a declaration with no declarator is well-formed, i.e.
3594 just declares a tagged type or anonymous union.
3596 Returns the type declared; or NULL_TREE if none. */
3599 check_tag_decl (cp_decl_specifier_seq *declspecs)
3601 int saw_friend = declspecs->specs[(int)ds_friend] != 0;
3602 int saw_typedef = declspecs->specs[(int)ds_typedef] != 0;
3603 /* If a class, struct, or enum type is declared by the DECLSPECS
3604 (i.e, if a class-specifier, enum-specifier, or non-typename
3605 elaborated-type-specifier appears in the DECLSPECS),
3606 DECLARED_TYPE is set to the corresponding type. */
3607 tree declared_type = NULL_TREE;
3608 bool error_p = false;
3610 if (declspecs->multiple_types_p)
3611 error ("multiple types in one declaration");
3612 else if (declspecs->redefined_builtin_type)
3614 if (!in_system_header)
3615 pedwarn ("redeclaration of C++ built-in type %qT",
3616 declspecs->redefined_builtin_type);
3621 && TYPE_P (declspecs->type)
3622 && ((TREE_CODE (declspecs->type) != TYPENAME_TYPE
3623 && IS_AGGR_TYPE (declspecs->type))
3624 || TREE_CODE (declspecs->type) == ENUMERAL_TYPE))
3625 declared_type = declspecs->type;
3626 else if (declspecs->type == error_mark_node)
3628 if (declared_type == NULL_TREE && ! saw_friend && !error_p)
3629 pedwarn ("declaration does not declare anything");
3630 /* Check for an anonymous union. */
3631 else if (declared_type && IS_AGGR_TYPE_CODE (TREE_CODE (declared_type))
3632 && TYPE_ANONYMOUS_P (declared_type))
3634 /* 7/3 In a simple-declaration, the optional init-declarator-list
3635 can be omitted only when declaring a class (clause 9) or
3636 enumeration (7.2), that is, when the decl-specifier-seq contains
3637 either a class-specifier, an elaborated-type-specifier with
3638 a class-key (9.1), or an enum-specifier. In these cases and
3639 whenever a class-specifier or enum-specifier is present in the
3640 decl-specifier-seq, the identifiers in these specifiers are among
3641 the names being declared by the declaration (as class-name,
3642 enum-names, or enumerators, depending on the syntax). In such
3643 cases, and except for the declaration of an unnamed bit-field (9.6),
3644 the decl-specifier-seq shall introduce one or more names into the
3645 program, or shall redeclare a name introduced by a previous
3646 declaration. [Example:
3647 enum { }; // ill-formed
3648 typedef class { }; // ill-formed
3652 error ("missing type-name in typedef-declaration");
3655 /* Anonymous unions are objects, so they can have specifiers. */;
3656 SET_ANON_AGGR_TYPE_P (declared_type);
3658 if (TREE_CODE (declared_type) != UNION_TYPE && pedantic
3659 && !in_system_header)
3660 pedwarn ("ISO C++ prohibits anonymous structs");
3665 if (declspecs->specs[(int)ds_inline]
3666 || declspecs->specs[(int)ds_virtual])
3667 error ("%qs can only be specified for functions",
3668 declspecs->specs[(int)ds_inline]
3669 ? "inline" : "virtual");
3671 && (!current_class_type
3672 || current_scope () != current_class_type))
3673 error ("%<friend%> can only be specified inside a class");
3674 else if (declspecs->specs[(int)ds_explicit])
3675 error ("%<explicit%> can only be specified for constructors");
3676 else if (declspecs->storage_class)
3677 error ("a storage class can only be specified for objects "
3679 else if (declspecs->specs[(int)ds_const]
3680 || declspecs->specs[(int)ds_volatile]
3681 || declspecs->specs[(int)ds_restrict]
3682 || declspecs->specs[(int)ds_thread])
3683 error ("qualifiers can only be specified for objects "
3687 return declared_type;
3690 /* Called when a declaration is seen that contains no names to declare.
3691 If its type is a reference to a structure, union or enum inherited
3692 from a containing scope, shadow that tag name for the current scope
3693 with a forward reference.
3694 If its type defines a new named structure or union
3695 or defines an enum, it is valid but we need not do anything here.
3696 Otherwise, it is an error.
3698 C++: may have to grok the declspecs to learn about static,
3699 complain for anonymous unions.
3701 Returns the TYPE declared -- or NULL_TREE if none. */
3704 shadow_tag (cp_decl_specifier_seq *declspecs)
3706 tree t = check_tag_decl (declspecs);
3711 if (declspecs->attributes)
3713 warning (0, "attribute ignored in declaration of %q+#T", t);
3714 warning (0, "attribute for %q+#T must follow the %qs keyword",
3715 t, class_key_or_enum_as_string (t));
3719 maybe_process_partial_specialization (t);
3721 /* This is where the variables in an anonymous union are
3722 declared. An anonymous union declaration looks like:
3724 because there is no declarator after the union, the parser
3725 sends that declaration here. */
3726 if (ANON_AGGR_TYPE_P (t))
3728 fixup_anonymous_aggr (t);
3730 if (TYPE_FIELDS (t))
3732 tree decl = grokdeclarator (/*declarator=*/NULL,
3733 declspecs, NORMAL, 0, NULL);
3734 finish_anon_union (decl);
3741 /* Decode a "typename", such as "int **", returning a ..._TYPE node. */
3744 groktypename (cp_decl_specifier_seq *type_specifiers,
3745 const cp_declarator *declarator)
3749 attrs = type_specifiers->attributes;
3750 type_specifiers->attributes = NULL_TREE;
3751 type = grokdeclarator (declarator, type_specifiers, TYPENAME, 0, &attrs);
3753 cplus_decl_attributes (&type, attrs, 0);
3757 /* Decode a declarator in an ordinary declaration or data definition.
3758 This is called as soon as the type information and variable name
3759 have been parsed, before parsing the initializer if any.
3760 Here we create the ..._DECL node, fill in its type,
3761 and put it on the list of decls for the current context.
3762 The ..._DECL node is returned as the value.
3764 Exception: for arrays where the length is not specified,
3765 the type is left null, to be filled in by `cp_finish_decl'.
3767 Function definitions do not come here; they go to start_function
3768 instead. However, external and forward declarations of functions
3769 do go through here. Structure field declarations are done by
3770 grokfield and not through here. */
3773 start_decl (const cp_declarator *declarator,
3774 cp_decl_specifier_seq *declspecs,
3777 tree prefix_attributes,
3778 tree *pushed_scope_p)
3784 *pushed_scope_p = NULL_TREE;
3786 /* This should only be done once on the top most decl. */
3787 if (have_extern_spec)
3789 declspecs->storage_class = sc_extern;
3790 have_extern_spec = false;
3793 /* An object declared as __attribute__((deprecated)) suppresses
3794 warnings of uses of other deprecated items. */
3795 if (lookup_attribute ("deprecated", attributes))
3796 deprecated_state = DEPRECATED_SUPPRESS;
3798 attributes = chainon (attributes, prefix_attributes);
3800 decl = grokdeclarator (declarator, declspecs, NORMAL, initialized,
3803 deprecated_state = DEPRECATED_NORMAL;
3805 if (decl == NULL_TREE || TREE_CODE (decl) == VOID_TYPE
3806 || decl == error_mark_node)
3807 return error_mark_node;
3809 type = TREE_TYPE (decl);
3811 context = DECL_CONTEXT (decl);
3815 *pushed_scope_p = push_scope (context);
3817 /* We are only interested in class contexts, later. */
3818 if (TREE_CODE (context) == NAMESPACE_DECL)
3819 context = NULL_TREE;
3823 /* Is it valid for this decl to have an initializer at all?
3824 If not, set INITIALIZED to zero, which will indirectly
3825 tell `cp_finish_decl' to ignore the initializer once it is parsed. */
3826 switch (TREE_CODE (decl))
3829 error ("typedef %qD is initialized (use __typeof__ instead)", decl);
3834 error ("function %q#D is initialized like a variable", decl);
3844 if (! toplevel_bindings_p ()
3845 && DECL_EXTERNAL (decl))
3846 warning (0, "declaration of %q#D has %<extern%> and is initialized",
3848 DECL_EXTERNAL (decl) = 0;
3849 if (toplevel_bindings_p ())
3850 TREE_STATIC (decl) = 1;
3852 /* Tell `pushdecl' this is an initialized decl
3853 even though we don't yet have the initializer expression.
3854 Also tell `cp_finish_decl' it may store the real initializer. */
3855 DECL_INITIAL (decl) = error_mark_node;
3858 /* Set attributes here so if duplicate decl, will have proper attributes. */
3859 cplus_decl_attributes (&decl, attributes, 0);
3861 /* If #pragma weak was used, mark the decl weak now. */
3862 maybe_apply_pragma_weak (decl);
3864 if (TREE_CODE (decl) == FUNCTION_DECL
3865 && DECL_DECLARED_INLINE_P (decl)
3866 && DECL_UNINLINABLE (decl)
3867 && lookup_attribute ("noinline", DECL_ATTRIBUTES (decl)))
3868 warning (0, "inline function %q+D given attribute noinline", decl);
3870 if (context && COMPLETE_TYPE_P (complete_type (context)))
3872 if (TREE_CODE (decl) == VAR_DECL)
3874 tree field = lookup_field (context, DECL_NAME (decl), 0, false);
3875 if (field == NULL_TREE || TREE_CODE (field) != VAR_DECL)
3876 error ("%q#D is not a static member of %q#T", decl, context);
3879 if (DECL_CONTEXT (field) != context)
3881 if (!same_type_p (DECL_CONTEXT (field), context))
3882 pedwarn ("ISO C++ does not permit %<%T::%D%> "
3883 "to be defined as %<%T::%D%>",
3884 DECL_CONTEXT (field), DECL_NAME (decl),
3885 context, DECL_NAME (decl));
3886 DECL_CONTEXT (decl) = DECL_CONTEXT (field);
3888 if (processing_specialization
3889 && template_class_depth (context) == 0
3890 && CLASSTYPE_TEMPLATE_SPECIALIZATION (context))
3891 error ("template header not allowed in member definition "
3892 "of explicitly specialized class");
3893 /* Static data member are tricky; an in-class initialization
3894 still doesn't provide a definition, so the in-class
3895 declaration will have DECL_EXTERNAL set, but will have an
3896 initialization. Thus, duplicate_decls won't warn
3897 about this situation, and so we check here. */
3898 if (DECL_INITIAL (decl)
3899 && DECL_INITIALIZED_IN_CLASS_P (field))
3900 error ("duplicate initialization of %qD", decl);
3901 if (duplicate_decls (decl, field, /*newdecl_is_friend=*/false))
3907 tree field = check_classfn (context, decl,
3908 (processing_template_decl
3909 > template_class_depth (context))
3910 ? current_template_parms
3912 if (field && duplicate_decls (decl, field,
3913 /*newdecl_is_friend=*/false))
3917 /* cp_finish_decl sets DECL_EXTERNAL if DECL_IN_AGGR_P is set. */
3918 DECL_IN_AGGR_P (decl) = 0;
3919 /* Do not mark DECL as an explicit specialization if it was not
3920 already marked as an instantiation; a declaration should
3921 never be marked as a specialization unless we know what
3922 template is being specialized. */
3923 if (DECL_LANG_SPECIFIC (decl) && DECL_USE_TEMPLATE (decl))
3925 SET_DECL_TEMPLATE_SPECIALIZATION (decl);
3927 /* [temp.expl.spec] An explicit specialization of a static data
3928 member of a template is a definition if the declaration
3929 includes an initializer; otherwise, it is a declaration.
3931 We check for processing_specialization so this only applies
3932 to the new specialization syntax. */
3933 if (!DECL_INITIAL (decl)
3934 && processing_specialization)
3935 DECL_EXTERNAL (decl) = 1;
3938 if (DECL_EXTERNAL (decl) && ! DECL_TEMPLATE_SPECIALIZATION (decl))
3939 pedwarn ("declaration of %q#D outside of class is not definition",
3943 /* Enter this declaration into the symbol table. */
3944 tem = maybe_push_decl (decl);
3946 if (processing_template_decl)
3947 tem = push_template_decl (tem);
3948 if (tem == error_mark_node)
3949 return error_mark_node;
3951 /* Tell the back-end to use or not use .common as appropriate. If we say
3952 -fconserve-space, we want this to save .data space, at the expense of
3953 wrong semantics. If we say -fno-conserve-space, we want this to
3954 produce errors about redefs; to do this we force variables into the
3956 if (flag_conserve_space
3957 && TREE_CODE (tem) == VAR_DECL
3958 && TREE_PUBLIC (tem)
3959 && !DECL_THREAD_LOCAL_P (tem)
3960 && !have_global_bss_p ())
3961 DECL_COMMON (tem) = 1;
3963 if (! processing_template_decl)
3970 start_decl_1 (tree decl)
3972 tree type = TREE_TYPE (decl);
3973 int initialized = (DECL_INITIAL (decl) != NULL_TREE);
3975 if (type == error_mark_node)
3979 /* Is it valid for this decl to have an initializer at all?
3980 If not, set INITIALIZED to zero, which will indirectly
3981 tell `cp_finish_decl' to ignore the initializer once it is parsed. */
3983 /* Don't allow initializations for incomplete types except for
3984 arrays which might be completed by the initialization. */
3985 if (COMPLETE_TYPE_P (complete_type (type)))
3986 ; /* A complete type is ok. */
3987 else if (TREE_CODE (type) != ARRAY_TYPE)
3989 error ("variable %q#D has initializer but incomplete type", decl);
3991 type = TREE_TYPE (decl) = error_mark_node;
3993 else if (!COMPLETE_TYPE_P (complete_type (TREE_TYPE (type))))
3995 if (DECL_LANG_SPECIFIC (decl) && DECL_TEMPLATE_INFO (decl))
3996 error ("elements of array %q#D have incomplete type", decl);
3997 /* else we already gave an error in start_decl. */
4003 && TREE_CODE (decl) != TYPE_DECL
4004 && TREE_CODE (decl) != TEMPLATE_DECL
4005 && type != error_mark_node
4006 && IS_AGGR_TYPE (type)
4007 && ! DECL_EXTERNAL (decl))
4009 if ((! processing_template_decl || ! uses_template_parms (type))
4010 && !COMPLETE_TYPE_P (complete_type (type)))
4012 error ("aggregate %q#D has incomplete type and cannot be defined",
4014 /* Change the type so that assemble_variable will give
4015 DECL an rtl we can live with: (mem (const_int 0)). */
4016 type = TREE_TYPE (decl) = error_mark_node;
4020 /* If any base type in the hierarchy of TYPE needs a constructor,
4021 then we set initialized to 1. This way any nodes which are
4022 created for the purposes of initializing this aggregate
4023 will live as long as it does. This is necessary for global
4024 aggregates which do not have their initializers processed until
4025 the end of the file. */
4026 initialized = TYPE_NEEDS_CONSTRUCTING (type);
4031 DECL_INITIAL (decl) = NULL_TREE;
4033 /* Create a new scope to hold this declaration if necessary.
4034 Whether or not a new scope is necessary cannot be determined
4035 until after the type has been completed; if the type is a
4036 specialization of a class template it is not until after
4037 instantiation has occurred that TYPE_HAS_NONTRIVIAL_DESTRUCTOR
4038 will be set correctly. */
4039 maybe_push_cleanup_level (type);
4042 /* Handle initialization of references. DECL, TYPE, and INIT have the
4043 same meaning as in cp_finish_decl. *CLEANUP must be NULL on entry,
4044 but will be set to a new CLEANUP_STMT if a temporary is created
4045 that must be destroyed subsequently.
4047 Returns an initializer expression to use to initialize DECL, or
4048 NULL if the initialization can be performed statically.
4050 Quotes on semantics can be found in ARM 8.4.3. */
4053 grok_reference_init (tree decl, tree type, tree init, tree *cleanup)
4057 if (init == NULL_TREE)
4059 if ((DECL_LANG_SPECIFIC (decl) == 0
4060 || DECL_IN_AGGR_P (decl) == 0)
4061 && ! DECL_THIS_EXTERN (decl))
4062 error ("%qD declared as reference but not initialized", decl);
4066 if (TREE_CODE (init) == CONSTRUCTOR)
4068 error ("ISO C++ forbids use of initializer list to "
4069 "initialize reference %qD", decl);
4073 if (TREE_CODE (init) == TREE_LIST)
4074 init = build_x_compound_expr_from_list (init, "initializer");
4076 if (TREE_CODE (TREE_TYPE (type)) != ARRAY_TYPE
4077 && TREE_CODE (TREE_TYPE (init)) == ARRAY_TYPE)
4078 /* Note: default conversion is only called in very special cases. */
4079 init = decay_conversion (init);
4081 /* Convert INIT to the reference type TYPE. This may involve the
4082 creation of a temporary, whose lifetime must be the same as that
4083 of the reference. If so, a DECL_EXPR for the temporary will be
4084 added just after the DECL_EXPR for DECL. That's why we don't set
4085 DECL_INITIAL for local references (instead assigning to them
4086 explicitly); we need to allow the temporary to be initialized
4088 tmp = initialize_reference (type, init, decl, cleanup);
4090 if (tmp == error_mark_node)
4092 else if (tmp == NULL_TREE)
4094 error ("cannot initialize %qT from %qT", type, TREE_TYPE (init));
4098 if (TREE_STATIC (decl) && !TREE_CONSTANT (tmp))
4101 DECL_INITIAL (decl) = tmp;
4106 /* When parsing `int a[] = {1, 2};' we don't know the size of the
4107 array until we finish parsing the initializer. If that's the
4108 situation we're in, update DECL accordingly. */
4111 maybe_deduce_size_from_array_init (tree decl, tree init)
4113 tree type = TREE_TYPE (decl);
4115 if (TREE_CODE (type) == ARRAY_TYPE
4116 && TYPE_DOMAIN (type) == NULL_TREE
4117 && TREE_CODE (decl) != TYPE_DECL)
4119 /* do_default is really a C-ism to deal with tentative definitions.
4120 But let's leave it here to ease the eventual merge. */
4121 int do_default = !DECL_EXTERNAL (decl);
4122 tree initializer = init ? init : DECL_INITIAL (decl);
4123 int failure = cp_complete_array_type (&TREE_TYPE (decl), initializer,
4127 error ("initializer fails to determine size of %qD", decl);
4132 error ("array size missing in %qD", decl);
4133 /* If a `static' var's size isn't known, make it extern as
4134 well as static, so it does not get allocated. If it's not
4135 `static', then don't mark it extern; finish_incomplete_decl
4136 will give it a default size and it will get allocated. */
4137 else if (!pedantic && TREE_STATIC (decl) && !TREE_PUBLIC (decl))
4138 DECL_EXTERNAL (decl) = 1;
4142 error ("zero-size array %qD", decl);
4144 cp_apply_type_quals_to_decl (cp_type_quals (TREE_TYPE (decl)), decl);
4146 layout_decl (decl, 0);
4150 /* Set DECL_SIZE, DECL_ALIGN, etc. for DECL (a VAR_DECL), and issue
4151 any appropriate error messages regarding the layout. */
4154 layout_var_decl (tree decl)
4156 tree type = TREE_TYPE (decl);
4158 /* If we haven't already layed out this declaration, do so now.
4159 Note that we must not call complete type for an external object
4160 because it's type might involve templates that we are not
4161 supposed to instantiate yet. (And it's perfectly valid to say
4162 `extern X x' for some incomplete type `X'.) */
4163 if (!DECL_EXTERNAL (decl))
4164 complete_type (type);
4165 if (!DECL_SIZE (decl)
4166 && TREE_TYPE (decl) != error_mark_node
4167 && (COMPLETE_TYPE_P (type)
4168 || (TREE_CODE (type) == ARRAY_TYPE
4169 && !TYPE_DOMAIN (type)
4170 && COMPLETE_TYPE_P (TREE_TYPE (type)))))
4171 layout_decl (decl, 0);
4173 if (!DECL_EXTERNAL (decl) && DECL_SIZE (decl) == NULL_TREE)
4175 /* An automatic variable with an incomplete type: that is an error.
4176 Don't talk about array types here, since we took care of that
4177 message in grokdeclarator. */
4178 error ("storage size of %qD isn't known", decl);
4179 TREE_TYPE (decl) = error_mark_node;
4182 /* Keep this code around in case we later want to control debug info
4183 based on whether a type is "used". (jason 1999-11-11) */
4185 else if (!DECL_EXTERNAL (decl) && IS_AGGR_TYPE (ttype))
4186 /* Let debugger know it should output info for this type. */
4187 note_debug_info_needed (ttype);
4189 if (TREE_STATIC (decl) && DECL_CLASS_SCOPE_P (decl))
4190 note_debug_info_needed (DECL_CONTEXT (decl));
4193 if ((DECL_EXTERNAL (decl) || TREE_STATIC (decl))
4194 && DECL_SIZE (decl) != NULL_TREE
4195 && ! TREE_CONSTANT (DECL_SIZE (decl)))
4197 if (TREE_CODE (DECL_SIZE (decl)) == INTEGER_CST)
4198 constant_expression_warning (DECL_SIZE (decl));
4200 error ("storage size of %qD isn't constant", decl);
4203 if (TREE_STATIC (decl)
4204 && !DECL_ARTIFICIAL (decl)
4205 && current_function_decl
4206 && DECL_CONTEXT (decl) == current_function_decl)
4207 push_local_name (decl);
4210 /* If a local static variable is declared in an inline function, or if
4211 we have a weak definition, we must endeavor to create only one
4212 instance of the variable at link-time. */
4215 maybe_commonize_var (tree decl)
4217 /* Static data in a function with comdat linkage also has comdat
4219 if (TREE_STATIC (decl)
4220 /* Don't mess with __FUNCTION__. */
4221 && ! DECL_ARTIFICIAL (decl)
4222 && DECL_FUNCTION_SCOPE_P (decl)
4223 /* Unfortunately, import_export_decl has not always been called
4224 before the function is processed, so we cannot simply check
4226 && (DECL_COMDAT (DECL_CONTEXT (decl))
4227 || ((DECL_DECLARED_INLINE_P (DECL_CONTEXT (decl))
4228 || DECL_TEMPLATE_INSTANTIATION (DECL_CONTEXT (decl)))
4229 && TREE_PUBLIC (DECL_CONTEXT (decl)))))
4233 /* With weak symbols, we simply make the variable COMDAT;
4234 that will cause copies in multiple translations units to
4236 comdat_linkage (decl);
4240 if (DECL_INITIAL (decl) == NULL_TREE
4241 || DECL_INITIAL (decl) == error_mark_node)
4243 /* Without weak symbols, we can use COMMON to merge
4244 uninitialized variables. */
4245 TREE_PUBLIC (decl) = 1;
4246 DECL_COMMON (decl) = 1;
4250 /* While for initialized variables, we must use internal
4251 linkage -- which means that multiple copies will not
4253 TREE_PUBLIC (decl) = 0;
4254 DECL_COMMON (decl) = 0;
4255 warning (0, "sorry: semantics of inline function static "
4256 "data %q+#D are wrong (you'll wind up "
4257 "with multiple copies)", decl);
4258 warning (0, "%J you can work around this by removing "
4264 else if (DECL_LANG_SPECIFIC (decl) && DECL_COMDAT (decl))
4265 /* Set it up again; we might have set DECL_INITIAL since the last
4267 comdat_linkage (decl);
4270 /* Issue an error message if DECL is an uninitialized const variable. */
4273 check_for_uninitialized_const_var (tree decl)
4275 tree type = TREE_TYPE (decl);
4277 /* ``Unless explicitly declared extern, a const object does not have
4278 external linkage and must be initialized. ($8.4; $12.1)'' ARM
4280 if (TREE_CODE (decl) == VAR_DECL
4281 && TREE_CODE (type) != REFERENCE_TYPE
4282 && CP_TYPE_CONST_P (type)
4283 && !TYPE_NEEDS_CONSTRUCTING (type)
4284 && !DECL_INITIAL (decl))
4285 error ("uninitialized const %qD", decl);
4289 /* Structure holding the current initializer being processed by reshape_init.
4290 CUR is a pointer to the current element being processed, END is a pointer
4291 after the last element present in the initializer. */
4292 typedef struct reshape_iterator_t
4294 constructor_elt *cur;
4295 constructor_elt *end;
4298 static tree reshape_init_r (tree, reshape_iter *, bool);
4300 /* FIELD is a FIELD_DECL or NULL. In the former case, the value
4301 returned is the next FIELD_DECL (possibly FIELD itself) that can be
4302 initialized. If there are no more such fields, the return value
4306 next_initializable_field (tree field)
4309 && (TREE_CODE (field) != FIELD_DECL
4310 || (DECL_C_BIT_FIELD (field) && !DECL_NAME (field))
4311 || DECL_ARTIFICIAL (field)))
4312 field = TREE_CHAIN (field);
4317 /* Subroutine of reshape_init_array and reshape_init_vector, which does
4318 the actual work. ELT_TYPE is the element type of the array. MAX_INDEX is an
4319 INTEGER_CST representing the size of the array minus one (the maximum index),
4320 or NULL_TREE if the array was declared without specifying the size. D is
4321 the iterator within the constructor. */
4324 reshape_init_array_1 (tree elt_type, tree max_index, reshape_iter *d)
4327 bool sized_array_p = (max_index != NULL_TREE);
4328 unsigned HOST_WIDE_INT max_index_cst = 0;
4329 unsigned HOST_WIDE_INT index;
4331 /* The initializer for an array is always a CONSTRUCTOR. */
4332 new_init = build_constructor (NULL_TREE, NULL);
4336 /* Minus 1 is used for zero sized arrays. */
4337 if (integer_all_onesp (max_index))
4340 if (host_integerp (max_index, 1))
4341 max_index_cst = tree_low_cst (max_index, 1);
4342 /* sizetype is sign extended, not zero extended. */
4344 max_index_cst = tree_low_cst (fold_convert (size_type_node, max_index),
4348 /* Loop until there are no more initializers. */
4350 d->cur != d->end && (!sized_array_p || index <= max_index_cst);
4357 /* Handle array designated initializers (GNU extension). */
4358 if (TREE_CODE (d->cur->index) == IDENTIFIER_NODE)
4360 error ("name %qD used in a GNU-style designated "
4361 "initializer for an array", d->cur->index);
4367 elt_init = reshape_init_r (elt_type, d, /*first_initializer_p=*/false);
4368 CONSTRUCTOR_APPEND_ELT (CONSTRUCTOR_ELTS (new_init), NULL_TREE, elt_init);
4374 /* Subroutine of reshape_init_r, processes the initializers for arrays.
4375 Parameters are the same of reshape_init_r. */
4378 reshape_init_array (tree type, reshape_iter *d)
4380 tree max_index = NULL_TREE;
4382 gcc_assert (TREE_CODE (type) == ARRAY_TYPE);
4384 if (TYPE_DOMAIN (type))
4385 max_index = array_type_nelts (type);
4387 return reshape_init_array_1 (TREE_TYPE (type), max_index, d);
4390 /* Subroutine of reshape_init_r, processes the initializers for vectors.
4391 Parameters are the same of reshape_init_r. */
4394 reshape_init_vector (tree type, reshape_iter *d)
4396 tree max_index = NULL_TREE;
4399 gcc_assert (TREE_CODE (type) == VECTOR_TYPE);
4401 if (COMPOUND_LITERAL_P (d->cur->value))
4403 tree value = d->cur->value;
4404 if (!same_type_p (TREE_TYPE (value), type))
4406 error ("invalid type %qT as initializer for a vector of type %qT",
4407 TREE_TYPE (d->cur->value), type);
4408 value = error_mark_node;
4414 /* For a vector, the representation type is a struct
4415 containing a single member which is an array of the
4416 appropriate size. */
4417 rtype = TYPE_DEBUG_REPRESENTATION_TYPE (type);
4418 if (rtype && TYPE_DOMAIN (TREE_TYPE (TYPE_FIELDS (rtype))))
4419 max_index = array_type_nelts (TREE_TYPE (TYPE_FIELDS (rtype)));
4421 return reshape_init_array_1 (TREE_TYPE (type), max_index, d);
4424 /* Subroutine of reshape_init_r, processes the initializers for classes
4425 or union. Parameters are the same of reshape_init_r. */
4428 reshape_init_class (tree type, reshape_iter *d, bool first_initializer_p)
4433 gcc_assert (CLASS_TYPE_P (type));
4435 /* The initializer for a class is always a CONSTRUCTOR. */
4436 new_init = build_constructor (NULL_TREE, NULL);
4437 field = next_initializable_field (TYPE_FIELDS (type));
4443 An initializer for an aggregate member that is an
4444 empty class shall have the form of an empty
4445 initializer-list {}. */
4446 if (!first_initializer_p)
4448 error ("initializer for %qT must be brace-enclosed", type);
4449 return error_mark_node;
4454 /* Loop through the initializable fields, gathering initializers. */
4455 while (d->cur != d->end)
4459 /* Handle designated initializers, as an extension. */
4463 pedwarn ("ISO C++ does not allow designated initializers");
4465 field = lookup_field_1 (type, d->cur->index, /*want_type=*/false);
4467 if (!field || TREE_CODE (field) != FIELD_DECL)
4468 error ("%qT has no non-static data member named %qD", type,
4472 /* If we processed all the member of the class, we are done. */
4476 field_init = reshape_init_r (TREE_TYPE (field), d,
4477 /*first_initializer_p=*/false);
4478 CONSTRUCTOR_APPEND_ELT (CONSTRUCTOR_ELTS (new_init), field, field_init);
4482 When a union is initialized with a brace-enclosed
4483 initializer, the braces shall only contain an
4484 initializer for the first member of the union. */
4485 if (TREE_CODE (type) == UNION_TYPE)
4488 field = next_initializable_field (TREE_CHAIN (field));
4494 /* Subroutine of reshape_init, which processes a single initializer (part of
4495 a CONSTRUCTOR). TYPE is the type of the variable being initialized, D is the
4496 iterator within the CONSTRUCTOR which points to the initializer to process.
4497 FIRST_INITIALIZER_P is true if this is the first initializer of the
4498 CONSTRUCTOR node. */
4501 reshape_init_r (tree type, reshape_iter *d, bool first_initializer_p)
4503 tree init = d->cur->value;
4505 /* A non-aggregate type is always initialized with a single
4507 if (!CP_AGGREGATE_TYPE_P (type))
4509 /* It is invalid to initialize a non-aggregate type with a
4510 brace-enclosed initializer.
4511 We need to check for BRACE_ENCLOSED_INITIALIZER_P here because
4512 of g++.old-deja/g++.mike/p7626.C: a pointer-to-member constant is
4513 a CONSTRUCTOR (with a record type). */
4514 if (TREE_CODE (init) == CONSTRUCTOR
4515 && BRACE_ENCLOSED_INITIALIZER_P (init)) /* p7626.C */
4517 error ("braces around scalar initializer for type %qT", type);
4518 init = error_mark_node;
4527 All implicit type conversions (clause _conv_) are considered when
4528 initializing the aggregate member with an initializer from an
4529 initializer-list. If the initializer can initialize a member,
4530 the member is initialized. Otherwise, if the member is itself a
4531 non-empty subaggregate, brace elision is assumed and the
4532 initializer is considered for the initialization of the first
4533 member of the subaggregate. */
4534 if (TREE_CODE (init) != CONSTRUCTOR
4535 && can_convert_arg (type, TREE_TYPE (init), init, LOOKUP_NORMAL))
4541 /* [dcl.init.string]
4543 A char array (whether plain char, signed char, or unsigned char)
4544 can be initialized by a string-literal (optionally enclosed in
4545 braces); a wchar_t array can be initialized by a wide
4546 string-literal (optionally enclosed in braces). */
4547 if (TREE_CODE (type) == ARRAY_TYPE
4548 && char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (type))))
4550 tree str_init = init;
4552 /* Strip one level of braces if and only if they enclose a single
4553 element (as allowed by [dcl.init.string]). */
4554 if (!first_initializer_p
4555 && TREE_CODE (str_init) == CONSTRUCTOR
4556 && VEC_length (constructor_elt, CONSTRUCTOR_ELTS (str_init)) == 1)
4558 str_init = VEC_index (constructor_elt,
4559 CONSTRUCTOR_ELTS (str_init), 0)->value;
4562 /* If it's a string literal, then it's the initializer for the array
4563 as a whole. Otherwise, continue with normal initialization for
4564 array types (one value per array element). */
4565 if (TREE_CODE (str_init) == STRING_CST)
4572 /* The following cases are about aggregates. If we are not within a full
4573 initializer already, and there is not a CONSTRUCTOR, it means that there
4574 is a missing set of braces (that is, we are processing the case for
4575 which reshape_init exists). */
4576 if (!first_initializer_p)
4578 if (TREE_CODE (init) == CONSTRUCTOR)
4580 /* For a nested compound literal, there is no need to reshape since
4581 brace elision is not allowed. Even if we decided to allow it,
4582 we should add a call to reshape_init in finish_compound_literal,
4583 before calling digest_init, so changing this code would still
4584 not be necessary. */
4585 if (!COMPOUND_LITERAL_P (init))
4588 gcc_assert (BRACE_ENCLOSED_INITIALIZER_P (init));
4589 return reshape_init (type, init);
4592 gcc_assert (!BRACE_ENCLOSED_INITIALIZER_P (init));
4595 warning (OPT_Wmissing_braces, "missing braces around initializer for %qT",
4599 /* Dispatch to specialized routines. */
4600 if (CLASS_TYPE_P (type))
4601 return reshape_init_class (type, d, first_initializer_p);
4602 else if (TREE_CODE (type) == ARRAY_TYPE)
4603 return reshape_init_array (type, d);
4604 else if (TREE_CODE (type) == VECTOR_TYPE)
4605 return reshape_init_vector (type, d);
4610 /* Undo the brace-elision allowed by [dcl.init.aggr] in a
4611 brace-enclosed aggregate initializer.
4613 INIT is the CONSTRUCTOR containing the list of initializers describing
4614 a brace-enclosed initializer for an entity of the indicated aggregate TYPE.
4615 It may not presently match the shape of the TYPE; for example:
4617 struct S { int a; int b; };
4618 struct S a[] = { 1, 2, 3, 4 };
4620 Here INIT will hold a VEC of four elements, rather than a
4621 VEC of two elements, each itself a VEC of two elements. This
4622 routine transforms INIT from the former form into the latter. The
4623 revised CONSTRUCTOR node is returned. */
4626 reshape_init (tree type, tree init)
4628 VEC(constructor_elt, gc) *v;
4632 gcc_assert (BRACE_ENCLOSED_INITIALIZER_P (init));
4634 v = CONSTRUCTOR_ELTS (init);
4636 /* An empty constructor does not need reshaping, and it is always a valid
4638 if (VEC_empty (constructor_elt, v))
4641 /* Recurse on this CONSTRUCTOR. */
4642 d.cur = VEC_index (constructor_elt, v, 0);
4643 d.end = d.cur + VEC_length (constructor_elt, v);
4645 new_init = reshape_init_r (type, &d, true);
4647 /* Make sure all the element of the constructor were used. Otherwise,
4648 issue an error about exceeding initializers. */
4650 error ("too many initializers for %qT", type);
4655 /* Verify INIT (the initializer for DECL), and record the
4656 initialization in DECL_INITIAL, if appropriate. CLEANUP is as for
4657 grok_reference_init.
4659 If the return value is non-NULL, it is an expression that must be
4660 evaluated dynamically to initialize DECL. */
4663 check_initializer (tree decl, tree init, int flags, tree *cleanup)
4665 tree type = TREE_TYPE (decl);
4666 tree init_code = NULL;
4668 /* If `start_decl' didn't like having an initialization, ignore it now. */
4669 if (init != NULL_TREE && DECL_INITIAL (decl) == NULL_TREE)
4672 /* If an initializer is present, DECL_INITIAL has been
4673 error_mark_node, to indicate that an as-of-yet unevaluated
4674 initialization will occur. From now on, DECL_INITIAL reflects
4675 the static initialization -- if any -- of DECL. */
4676 DECL_INITIAL (decl) = NULL_TREE;
4678 /* Things that are going to be initialized need to have complete
4680 TREE_TYPE (decl) = type = complete_type (TREE_TYPE (decl));
4682 if (type == error_mark_node)
4683 /* We will have already complained. */
4685 else if (init && COMPLETE_TYPE_P (type)
4686 && !TREE_CONSTANT (TYPE_SIZE (type)))
4688 error ("variable-sized object %qD may not be initialized", decl);
4691 else if (TREE_CODE (type) == ARRAY_TYPE
4692 && !COMPLETE_TYPE_P (complete_type (TREE_TYPE (type))))
4694 error ("elements of array %q#D have incomplete type", decl);
4697 else if (TREE_CODE (type) != ARRAY_TYPE && !COMPLETE_TYPE_P (type))
4699 error ("%qD has incomplete type", decl);
4700 TREE_TYPE (decl) = error_mark_node;
4704 if (TREE_CODE (decl) == CONST_DECL)
4706 gcc_assert (TREE_CODE (type) != REFERENCE_TYPE);
4708 DECL_INITIAL (decl) = init;
4710 gcc_assert (init != NULL_TREE);
4713 else if (!DECL_EXTERNAL (decl) && TREE_CODE (type) == REFERENCE_TYPE)
4714 init = grok_reference_init (decl, type, init, cleanup);
4717 /* Do not reshape constructors of vectors (they don't need to be
4719 if (TREE_CODE (init) == CONSTRUCTOR
4720 && !COMPOUND_LITERAL_P (init)
4721 && !TREE_TYPE (init)) /* ptrmemfunc */
4723 init = reshape_init (type, init);
4725 if ((*targetm.vector_opaque_p) (type))
4727 error ("opaque vector types cannot be initialized");
4728 init = error_mark_node;
4732 /* If DECL has an array type without a specific bound, deduce the
4733 array size from the initializer. */
4734 maybe_deduce_size_from_array_init (decl, init);
4735 type = TREE_TYPE (decl);
4737 if (TYPE_HAS_CONSTRUCTOR (type) || TYPE_NEEDS_CONSTRUCTING (type))
4739 if (TREE_CODE (type) == ARRAY_TYPE)
4740 goto initialize_aggr;
4741 else if (TREE_CODE (init) == CONSTRUCTOR)
4743 if (TYPE_NON_AGGREGATE_CLASS (type))
4745 error ("%qD must be initialized by constructor, "
4748 init = error_mark_node;
4751 goto dont_use_constructor;
4755 int saved_stmts_are_full_exprs_p;
4758 saved_stmts_are_full_exprs_p = 0;
4759 if (building_stmt_tree ())
4761 saved_stmts_are_full_exprs_p = stmts_are_full_exprs_p ();
4762 current_stmt_tree ()->stmts_are_full_exprs_p = 1;
4764 init = build_aggr_init (decl, init, flags);
4765 if (building_stmt_tree ())
4766 current_stmt_tree ()->stmts_are_full_exprs_p =
4767 saved_stmts_are_full_exprs_p;
4773 dont_use_constructor:
4774 if (TREE_CODE (init) != TREE_VEC)
4776 init_code = store_init_value (decl, init);
4777 if (pedantic && TREE_CODE (type) == ARRAY_TYPE
4778 && DECL_INITIAL (decl)
4779 && TREE_CODE (DECL_INITIAL (decl)) == STRING_CST
4780 && PAREN_STRING_LITERAL_P (DECL_INITIAL (decl)))
4781 warning (0, "array %qD initialized by parenthesized string literal %qE",
4782 decl, DECL_INITIAL (decl));
4787 else if (DECL_EXTERNAL (decl))
4789 else if (TYPE_P (type) && TYPE_NEEDS_CONSTRUCTING (type))
4790 goto initialize_aggr;
4791 else if (IS_AGGR_TYPE (type))
4793 tree core_type = strip_array_types (type);
4795 if (CLASSTYPE_READONLY_FIELDS_NEED_INIT (core_type))
4796 error ("structure %qD with uninitialized const members", decl);
4797 if (CLASSTYPE_REF_FIELDS_NEED_INIT (core_type))
4798 error ("structure %qD with uninitialized reference members", decl);
4800 check_for_uninitialized_const_var (decl);
4803 check_for_uninitialized_const_var (decl);
4805 if (init && init != error_mark_node)
4806 init_code = build2 (INIT_EXPR, type, decl, init);
4811 /* If DECL is not a local variable, give it RTL. */
4814 make_rtl_for_nonlocal_decl (tree decl, tree init, const char* asmspec)
4816 int toplev = toplevel_bindings_p ();
4818 const char *filename;
4820 /* Set the DECL_ASSEMBLER_NAME for the object. */
4823 /* The `register' keyword, when used together with an
4824 asm-specification, indicates that the variable should be
4825 placed in a particular register. */
4826 if (TREE_CODE (decl) == VAR_DECL && DECL_REGISTER (decl))
4828 set_user_assembler_name (decl, asmspec);
4829 DECL_HARD_REGISTER (decl) = 1;
4833 if (TREE_CODE (decl) == FUNCTION_DECL
4834 && DECL_BUILT_IN_CLASS (decl) == BUILT_IN_NORMAL)
4835 set_builtin_user_assembler_name (decl, asmspec);
4836 set_user_assembler_name (decl, asmspec);
4840 /* Handle non-variables up front. */
4841 if (TREE_CODE (decl) != VAR_DECL)
4843 rest_of_decl_compilation (decl, toplev, at_eof);
4847 /* If we see a class member here, it should be a static data
4849 if (DECL_LANG_SPECIFIC (decl) && DECL_IN_AGGR_P (decl))
4851 gcc_assert (TREE_STATIC (decl));
4852 /* An in-class declaration of a static data member should be
4853 external; it is only a declaration, and not a definition. */
4854 if (init == NULL_TREE)
4855 gcc_assert (DECL_EXTERNAL (decl));
4858 /* We don't create any RTL for local variables. */
4859 if (DECL_FUNCTION_SCOPE_P (decl) && !TREE_STATIC (decl))
4862 /* We defer emission of local statics until the corresponding
4863 DECL_EXPR is expanded. */
4864 defer_p = DECL_FUNCTION_SCOPE_P (decl) || DECL_VIRTUAL_P (decl);
4866 /* We try to defer namespace-scope static constants so that they are
4867 not emitted into the object file unnecessarily. */
4868 filename = input_filename;
4869 if (!DECL_VIRTUAL_P (decl)
4870 && TREE_READONLY (decl)
4871 && DECL_INITIAL (decl) != NULL_TREE
4872 && DECL_INITIAL (decl) != error_mark_node
4874 && ! EMPTY_CONSTRUCTOR_P (DECL_INITIAL (decl))
4876 && !TREE_PUBLIC (decl))
4878 /* Fool with the linkage of static consts according to #pragma
4880 struct c_fileinfo *finfo = get_fileinfo (lbasename (filename));
4881 if (!finfo->interface_unknown && !TREE_PUBLIC (decl))
4883 TREE_PUBLIC (decl) = 1;
4884 DECL_EXTERNAL (decl) = finfo->interface_only;
4889 /* Likewise for template instantiations. */
4890 else if (DECL_LANG_SPECIFIC (decl)
4891 && DECL_IMPLICIT_INSTANTIATION (decl))
4894 /* If we're not deferring, go ahead and assemble the variable. */
4896 rest_of_decl_compilation (decl, toplev, at_eof);
4899 /* Generate code to initialize DECL (a local variable). */
4902 initialize_local_var (tree decl, tree init)
4904 tree type = TREE_TYPE (decl);
4907 gcc_assert (TREE_CODE (decl) == VAR_DECL
4908 || TREE_CODE (decl) == RESULT_DECL);
4909 gcc_assert (!TREE_STATIC (decl));
4911 if (DECL_SIZE (decl) == NULL_TREE)
4913 /* If we used it already as memory, it must stay in memory. */
4914 DECL_INITIAL (decl) = NULL_TREE;
4915 TREE_ADDRESSABLE (decl) = TREE_USED (decl);
4918 if (DECL_SIZE (decl) && type != error_mark_node)
4922 /* Compute and store the initial value. */
4923 already_used = TREE_USED (decl) || TREE_USED (type);
4925 /* Perform the initialization. */
4928 int saved_stmts_are_full_exprs_p;
4930 gcc_assert (building_stmt_tree ());
4931 saved_stmts_are_full_exprs_p = stmts_are_full_exprs_p ();
4932 current_stmt_tree ()->stmts_are_full_exprs_p = 1;
4933 finish_expr_stmt (init);
4934 current_stmt_tree ()->stmts_are_full_exprs_p =
4935 saved_stmts_are_full_exprs_p;
4938 /* Set this to 0 so we can tell whether an aggregate which was
4939 initialized was ever used. Don't do this if it has a
4940 destructor, so we don't complain about the 'resource
4941 allocation is initialization' idiom. Now set
4942 attribute((unused)) on types so decls of that type will be
4943 marked used. (see TREE_USED, above.) */
4944 if (TYPE_NEEDS_CONSTRUCTING (type)
4946 && TYPE_HAS_TRIVIAL_DESTRUCTOR (type)
4947 && DECL_NAME (decl))
4948 TREE_USED (decl) = 0;
4949 else if (already_used)
4950 TREE_USED (decl) = 1;
4953 /* Generate a cleanup, if necessary. */
4954 cleanup = cxx_maybe_build_cleanup (decl);
4955 if (DECL_SIZE (decl) && cleanup)
4956 finish_decl_cleanup (decl, cleanup);
4959 /* DECL is a VAR_DECL for a compiler-generated variable with static
4960 storage duration (like a virtual table) whose initializer is a
4961 compile-time constant. INIT must be either a TREE_LIST of values,
4962 or a CONSTRUCTOR. Initialize the variable and provide it to the
4966 initialize_artificial_var (tree decl, tree init)
4968 if (TREE_CODE (init) == TREE_LIST)
4969 init = build_constructor_from_list (NULL_TREE, init);
4970 gcc_assert (TREE_CODE (init) == CONSTRUCTOR);
4971 DECL_INITIAL (decl) = init;
4972 DECL_INITIALIZED_P (decl) = 1;
4973 determine_visibility (decl);
4974 layout_var_decl (decl);
4975 maybe_commonize_var (decl);
4976 make_rtl_for_nonlocal_decl (decl, init, /*asmspec=*/NULL);
4979 /* Finish processing of a declaration;
4980 install its line number and initial value.
4981 If the length of an array type is not known before,
4982 it must be determined now, from the initial value, or it is an error.
4984 INIT is the initializer (if any) for DECL. If INIT_CONST_EXPR_P is
4985 true, then INIT is an integral constant expression.
4987 FLAGS is LOOKUP_ONLYCONVERTING if the = init syntax was used, else 0
4988 if the (init) syntax was used. */
4991 cp_finish_decl (tree decl, tree init, bool init_const_expr_p,
4992 tree asmspec_tree, int flags)
4996 const char *asmspec = NULL;
4997 int was_readonly = 0;
4998 bool var_definition_p = false;
5000 if (decl == error_mark_node)
5005 error ("assignment (not initialization) in declaration");
5009 gcc_assert (TREE_CODE (decl) != RESULT_DECL);
5011 /* Assume no cleanup is required. */
5012 cleanup = NULL_TREE;
5014 /* If a name was specified, get the string. */
5015 if (global_scope_p (current_binding_level))
5016 asmspec_tree = maybe_apply_renaming_pragma (decl, asmspec_tree);
5018 asmspec = TREE_STRING_POINTER (asmspec_tree);
5020 if (init && TREE_CODE (init) == NAMESPACE_DECL)
5022 error ("cannot initialize %qD to namespace %qD", decl, init);
5026 if (current_class_type
5027 && CP_DECL_CONTEXT (decl) == current_class_type
5028 && TYPE_BEING_DEFINED (current_class_type)
5029 && (DECL_INITIAL (decl) || init))
5030 DECL_INITIALIZED_IN_CLASS_P (decl) = 1;
5032 type = TREE_TYPE (decl);
5034 if (type == error_mark_node)
5037 if (processing_template_decl)
5039 /* Add this declaration to the statement-tree. */
5040 if (at_function_scope_p ())
5041 add_decl_expr (decl);
5043 if (init && DECL_INITIAL (decl))
5045 DECL_INITIAL (decl) = init;
5046 if (init_const_expr_p)
5048 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (decl) = 1;
5049 if (DECL_INTEGRAL_CONSTANT_VAR_P (decl))
5050 TREE_CONSTANT (decl) = 1;
5054 if (TREE_CODE (decl) == VAR_DECL
5055 && !DECL_PRETTY_FUNCTION_P (decl)
5056 && !dependent_type_p (TREE_TYPE (decl)))
5057 maybe_deduce_size_from_array_init (decl, init);
5062 /* Parameters are handled by store_parm_decls, not cp_finish_decl. */
5063 gcc_assert (TREE_CODE (decl) != PARM_DECL);
5065 /* Take care of TYPE_DECLs up front. */
5066 if (TREE_CODE (decl) == TYPE_DECL)
5068 if (type != error_mark_node
5069 && IS_AGGR_TYPE (type) && DECL_NAME (decl))
5071 if (TREE_TYPE (DECL_NAME (decl)) && TREE_TYPE (decl) != type)
5072 warning (0, "shadowing previous type declaration of %q#D", decl);
5073 set_identifier_type_value (DECL_NAME (decl), decl);
5076 /* If we have installed this as the canonical typedef for this
5077 type, and that type has not been defined yet, delay emitting
5078 the debug information for it, as we will emit it later. */
5079 if (TYPE_MAIN_DECL (TREE_TYPE (decl)) == decl
5080 && !COMPLETE_TYPE_P (TREE_TYPE (decl)))
5081 TYPE_DECL_SUPPRESS_DEBUG (decl) = 1;
5083 rest_of_decl_compilation (decl, DECL_CONTEXT (decl) == NULL_TREE,
5088 /* A reference will be modified here, as it is initialized. */
5089 if (! DECL_EXTERNAL (decl)
5090 && TREE_READONLY (decl)
5091 && TREE_CODE (type) == REFERENCE_TYPE)
5094 TREE_READONLY (decl) = 0;
5097 if (TREE_CODE (decl) == VAR_DECL)
5099 /* Only PODs can have thread-local storage. Other types may require
5100 various kinds of non-trivial initialization. */
5101 if (DECL_THREAD_LOCAL_P (decl) && !pod_type_p (TREE_TYPE (decl)))
5102 error ("%qD cannot be thread-local because it has non-POD type %qT",
5103 decl, TREE_TYPE (decl));
5104 /* Convert the initializer to the type of DECL, if we have not
5105 already initialized DECL. */
5106 if (!DECL_INITIALIZED_P (decl)
5107 /* If !DECL_EXTERNAL then DECL is being defined. In the
5108 case of a static data member initialized inside the
5109 class-specifier, there can be an initializer even if DECL
5110 is *not* defined. */
5111 && (!DECL_EXTERNAL (decl) || init))
5115 DECL_NONTRIVIALLY_INITIALIZED_P (decl) = 1;
5116 if (init_const_expr_p)
5118 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (decl) = 1;
5119 if (DECL_INTEGRAL_CONSTANT_VAR_P (decl))
5120 TREE_CONSTANT (decl) = 1;
5123 init = check_initializer (decl, init, flags, &cleanup);
5124 /* Thread-local storage cannot be dynamically initialized. */
5125 if (DECL_THREAD_LOCAL_P (decl) && init)
5127 error ("%qD is thread-local and so cannot be dynamically "
5128 "initialized", decl);
5132 /* Check that the initializer for a static data member was a
5133 constant. Although we check in the parser that the
5134 initializer is an integral constant expression, we do not
5135 simplify division-by-zero at the point at which it
5136 occurs. Therefore, in:
5138 struct S { static const int i = 7 / 0; };
5140 we issue an error at this point. It would
5141 probably be better to forbid division by zero in
5142 integral constant expressions. */
5143 if (DECL_EXTERNAL (decl) && init)
5145 error ("%qD cannot be initialized by a non-constant expression"
5146 " when being declared", decl);
5147 DECL_INITIALIZED_IN_CLASS_P (decl) = 0;
5155 The memory occupied by any object of static storage
5156 duration is zero-initialized at program startup before
5157 any other initialization takes place.
5159 We cannot create an appropriate initializer until after
5160 the type of DECL is finalized. If DECL_INITIAL is set,
5161 then the DECL is statically initialized, and any
5162 necessary zero-initialization has already been performed. */
5163 if (TREE_STATIC (decl) && !DECL_INITIAL (decl))
5164 DECL_INITIAL (decl) = build_zero_init (TREE_TYPE (decl),
5165 /*nelts=*/NULL_TREE,
5166 /*static_storage_p=*/true);
5167 /* Remember that the initialization for this variable has
5169 DECL_INITIALIZED_P (decl) = 1;
5170 /* This declaration is the definition of this variable,
5171 unless we are initializing a static data member within
5172 the class specifier. */
5173 if (!DECL_EXTERNAL (decl))
5174 var_definition_p = true;
5176 /* If the variable has an array type, lay out the type, even if
5177 there is no initializer. It is valid to index through the
5178 array, and we must get TYPE_ALIGN set correctly on the array
5180 else if (TREE_CODE (type) == ARRAY_TYPE)
5184 /* Add this declaration to the statement-tree. This needs to happen
5185 after the call to check_initializer so that the DECL_EXPR for a
5186 reference temp is added before the DECL_EXPR for the reference itself. */
5187 if (at_function_scope_p ())
5188 add_decl_expr (decl);
5190 if (TREE_CODE (decl) == VAR_DECL)
5191 layout_var_decl (decl);
5193 /* Output the assembler code and/or RTL code for variables and functions,
5194 unless the type is an undefined structure or union.
5195 If not, it will get done when the type is completed. */
5196 if (TREE_CODE (decl) == VAR_DECL || TREE_CODE (decl) == FUNCTION_DECL)
5198 if (TREE_CODE (decl) == VAR_DECL)
5199 maybe_commonize_var (decl);
5201 make_rtl_for_nonlocal_decl (decl, init, asmspec);
5203 /* Check for abstractness of the type. Notice that there is no
5204 need to strip array types here since the check for those types
5205 is already done within create_array_type_for_decl. */
5206 if (TREE_CODE (type) == FUNCTION_TYPE
5207 || TREE_CODE (type) == METHOD_TYPE)
5208 abstract_virtuals_error (decl, TREE_TYPE (type));
5210 abstract_virtuals_error (decl, type);
5212 if (TREE_CODE (decl) == FUNCTION_DECL
5213 || TREE_TYPE (decl) == error_mark_node)
5214 /* No initialization required. */
5216 else if (DECL_EXTERNAL (decl)
5217 && ! (DECL_LANG_SPECIFIC (decl)
5218 && DECL_NOT_REALLY_EXTERN (decl)))
5221 DECL_INITIAL (decl) = init;
5225 /* A variable definition. */
5226 if (DECL_FUNCTION_SCOPE_P (decl))
5228 /* Initialize the local variable. */
5229 if (processing_template_decl)
5231 if (init || DECL_INITIAL (decl) == error_mark_node)
5232 DECL_INITIAL (decl) = init;
5234 else if (!TREE_STATIC (decl))
5235 initialize_local_var (decl, init);
5238 /* The variable is being defined, so determine its visibility.
5239 This needs to happen after the linkage is set. */
5240 determine_visibility (decl);
5242 /* If a variable is defined, and then a subsequent
5243 definition with external linkage is encountered, we will
5244 get here twice for the same variable. We want to avoid
5245 calling expand_static_init more than once. For variables
5246 that are not static data members, we can call
5247 expand_static_init only when we actually process the
5248 initializer. It is not legal to redeclare a static data
5249 member, so this issue does not arise in that case. */
5250 if (var_definition_p && TREE_STATIC (decl))
5251 expand_static_init (decl, init);
5255 /* If a CLEANUP_STMT was created to destroy a temporary bound to a
5256 reference, insert it in the statement-tree now. */
5258 push_cleanup (decl, cleanup, false);
5263 TREE_READONLY (decl) = 1;
5265 /* If this was marked 'used', be sure it will be output. */
5266 if (lookup_attribute ("used", DECL_ATTRIBUTES (decl)))
5267 mark_decl_referenced (decl);
5270 /* This is here for a midend callback from c-common.c. */
5273 finish_decl (tree decl, tree init, tree asmspec_tree)
5275 cp_finish_decl (decl, init, /*init_const_expr_p=*/false, asmspec_tree, 0);
5278 /* Returns a declaration for a VAR_DECL as if:
5280 extern "C" TYPE NAME;
5282 had been seen. Used to create compiler-generated global
5286 declare_global_var (tree name, tree type)
5290 push_to_top_level ();
5291 decl = build_decl (VAR_DECL, name, type);
5292 TREE_PUBLIC (decl) = 1;
5293 DECL_EXTERNAL (decl) = 1;
5294 DECL_ARTIFICIAL (decl) = 1;
5295 /* If the user has explicitly declared this variable (perhaps
5296 because the code we are compiling is part of a low-level runtime
5297 library), then it is possible that our declaration will be merged
5298 with theirs by pushdecl. */
5299 decl = pushdecl (decl);
5300 finish_decl (decl, NULL_TREE, NULL_TREE);
5301 pop_from_top_level ();
5306 /* Returns a pointer to the `atexit' function. Note that if
5307 FLAG_USE_CXA_ATEXIT is nonzero, then this will actually be the new
5308 `__cxa_atexit' function specified in the IA64 C++ ABI. */
5311 get_atexit_node (void)
5318 bool use_aeabi_atexit;
5323 if (flag_use_cxa_atexit)
5325 /* The declaration for `__cxa_atexit' is:
5327 int __cxa_atexit (void (*)(void *), void *, void *)
5329 We build up the argument types and then then function type
5332 use_aeabi_atexit = targetm.cxx.use_aeabi_atexit ();
5333 /* First, build the pointer-to-function type for the first
5335 arg_types = tree_cons (NULL_TREE, ptr_type_node, void_list_node);
5336 fn_type = build_function_type (void_type_node, arg_types);
5337 fn_ptr_type = build_pointer_type (fn_type);
5338 /* Then, build the rest of the argument types. */
5339 arg_types = tree_cons (NULL_TREE, ptr_type_node, void_list_node);
5340 if (use_aeabi_atexit)
5342 arg_types = tree_cons (NULL_TREE, fn_ptr_type, arg_types);
5343 arg_types = tree_cons (NULL_TREE, ptr_type_node, arg_types);
5347 arg_types = tree_cons (NULL_TREE, ptr_type_node, arg_types);
5348 arg_types = tree_cons (NULL_TREE, fn_ptr_type, arg_types);
5350 /* And the final __cxa_atexit type. */
5351 fn_type = build_function_type (integer_type_node, arg_types);
5352 fn_ptr_type = build_pointer_type (fn_type);
5353 if (use_aeabi_atexit)
5354 name = "__aeabi_atexit";
5356 name = "__cxa_atexit";
5360 /* The declaration for `atexit' is:
5362 int atexit (void (*)());
5364 We build up the argument types and then then function type
5366 fn_type = build_function_type (void_type_node, void_list_node);
5367 fn_ptr_type = build_pointer_type (fn_type);
5368 arg_types = tree_cons (NULL_TREE, fn_ptr_type, void_list_node);
5369 /* Build the final atexit type. */
5370 fn_type = build_function_type (integer_type_node, arg_types);
5374 /* Now, build the function declaration. */
5375 push_lang_context (lang_name_c);
5376 atexit_fndecl = build_library_fn_ptr (name, fn_type);
5377 mark_used (atexit_fndecl);
5378 pop_lang_context ();
5379 atexit_node = decay_conversion (atexit_fndecl);
5384 /* Returns the __dso_handle VAR_DECL. */
5387 get_dso_handle_node (void)
5389 if (dso_handle_node)
5390 return dso_handle_node;
5392 /* Declare the variable. */
5393 dso_handle_node = declare_global_var (get_identifier ("__dso_handle"),
5396 return dso_handle_node;
5399 /* Begin a new function with internal linkage whose job will be simply
5400 to destroy some particular variable. */
5402 static GTY(()) int start_cleanup_cnt;
5405 start_cleanup_fn (void)
5412 push_to_top_level ();
5414 /* No need to mangle this. */
5415 push_lang_context (lang_name_c);
5417 /* Build the parameter-types. */
5418 parmtypes = void_list_node;
5419 /* Functions passed to __cxa_atexit take an additional parameter.
5420 We'll just ignore it. After we implement the new calling
5421 convention for destructors, we can eliminate the use of
5422 additional cleanup functions entirely in the -fnew-abi case. */
5423 if (flag_use_cxa_atexit)
5424 parmtypes = tree_cons (NULL_TREE, ptr_type_node, parmtypes);
5425 /* Build the function type itself. */
5426 fntype = build_function_type (void_type_node, parmtypes);
5427 /* Build the name of the function. */
5428 sprintf (name, "__tcf_%d", start_cleanup_cnt++);
5429 /* Build the function declaration. */
5430 fndecl = build_lang_decl (FUNCTION_DECL, get_identifier (name), fntype);
5431 /* It's a function with internal linkage, generated by the
5433 TREE_PUBLIC (fndecl) = 0;
5434 DECL_ARTIFICIAL (fndecl) = 1;
5435 /* Make the function `inline' so that it is only emitted if it is
5436 actually needed. It is unlikely that it will be inlined, since
5437 it is only called via a function pointer, but we avoid unnecessary
5438 emissions this way. */
5439 DECL_INLINE (fndecl) = 1;
5440 DECL_DECLARED_INLINE_P (fndecl) = 1;
5441 DECL_INTERFACE_KNOWN (fndecl) = 1;
5442 /* Build the parameter. */
5443 if (flag_use_cxa_atexit)
5447 parmdecl = cp_build_parm_decl (NULL_TREE, ptr_type_node);
5448 DECL_CONTEXT (parmdecl) = fndecl;
5449 TREE_USED (parmdecl) = 1;
5450 DECL_ARGUMENTS (fndecl) = parmdecl;
5454 start_preparsed_function (fndecl, NULL_TREE, SF_PRE_PARSED);
5456 pop_lang_context ();
5458 return current_function_decl;
5461 /* Finish the cleanup function begun by start_cleanup_fn. */
5464 end_cleanup_fn (void)
5466 expand_or_defer_fn (finish_function (0));
5468 pop_from_top_level ();
5471 /* Generate code to handle the destruction of DECL, an object with
5472 static storage duration. */
5475 register_dtor_fn (tree decl)
5482 if (TYPE_HAS_TRIVIAL_DESTRUCTOR (TREE_TYPE (decl)))
5483 return void_zero_node;
5485 /* Call build_cleanup before we enter the anonymous function so that
5486 any access checks will be done relative to the current scope,
5487 rather than the scope of the anonymous function. */
5488 build_cleanup (decl);
5490 /* Now start the function. */
5491 cleanup = start_cleanup_fn ();
5493 /* Now, recompute the cleanup. It may contain SAVE_EXPRs that refer
5494 to the original function, rather than the anonymous one. That
5495 will make the back-end think that nested functions are in use,
5496 which causes confusion. */
5498 push_deferring_access_checks (dk_no_check);
5499 fcall = build_cleanup (decl);
5500 pop_deferring_access_checks ();
5502 /* Create the body of the anonymous function. */
5503 compound_stmt = begin_compound_stmt (BCS_FN_BODY);
5504 finish_expr_stmt (fcall);
5505 finish_compound_stmt (compound_stmt);
5508 /* Call atexit with the cleanup function. */
5509 cxx_mark_addressable (cleanup);
5510 mark_used (cleanup);
5511 cleanup = build_unary_op (ADDR_EXPR, cleanup, 0);
5512 if (flag_use_cxa_atexit)
5514 args = tree_cons (NULL_TREE,
5515 build_unary_op (ADDR_EXPR, get_dso_handle_node (), 0),
5517 if (targetm.cxx.use_aeabi_atexit ())
5519 args = tree_cons (NULL_TREE, cleanup, args);
5520 args = tree_cons (NULL_TREE, null_pointer_node, args);
5524 args = tree_cons (NULL_TREE, null_pointer_node, args);
5525 args = tree_cons (NULL_TREE, cleanup, args);
5529 args = tree_cons (NULL_TREE, cleanup, NULL_TREE);
5530 return build_function_call (get_atexit_node (), args);
5533 /* DECL is a VAR_DECL with static storage duration. INIT, if present,
5534 is its initializer. Generate code to handle the construction
5535 and destruction of DECL. */
5538 expand_static_init (tree decl, tree init)
5540 gcc_assert (TREE_CODE (decl) == VAR_DECL);
5541 gcc_assert (TREE_STATIC (decl));
5543 /* Some variables require no initialization. */
5545 && !TYPE_NEEDS_CONSTRUCTING (TREE_TYPE (decl))
5546 && TYPE_HAS_TRIVIAL_DESTRUCTOR (TREE_TYPE (decl)))
5549 if (DECL_FUNCTION_SCOPE_P (decl))
5551 /* Emit code to perform this initialization but once. */
5552 tree if_stmt = NULL_TREE, inner_if_stmt = NULL_TREE;
5553 tree then_clause = NULL_TREE, inner_then_clause = NULL_TREE;
5554 tree guard, guard_addr, guard_addr_list;
5555 tree acquire_fn, release_fn, abort_fn;
5558 /* Emit code to perform this initialization but once. This code
5561 static <type> guard;
5562 if (!guard.first_byte) {
5563 if (__cxa_guard_acquire (&guard)) {
5566 // Do initialization.
5567 flag = true; __cxa_guard_release (&guard);
5568 // Register variable for destruction at end of program.
5570 if (!flag) __cxa_guard_abort (&guard);
5574 Note that the `flag' variable is only set to 1 *after* the
5575 initialization is complete. This ensures that an exception,
5576 thrown during the construction, will cause the variable to
5577 reinitialized when we pass through this code again, as per:
5581 If the initialization exits by throwing an exception, the
5582 initialization is not complete, so it will be tried again
5583 the next time control enters the declaration.
5585 This process should be thread-safe, too; multiple threads
5586 should not be able to initialize the variable more than
5589 /* Create the guard variable. */
5590 guard = get_guard (decl);
5592 /* This optimization isn't safe on targets with relaxed memory
5593 consistency. On such targets we force synchronization in
5594 __cxa_guard_acquire. */
5595 if (!targetm.relaxed_ordering || !flag_threadsafe_statics)
5597 /* Begin the conditional initialization. */
5598 if_stmt = begin_if_stmt ();
5599 finish_if_stmt_cond (get_guard_cond (guard), if_stmt);
5600 then_clause = begin_compound_stmt (BCS_NO_SCOPE);
5603 if (flag_threadsafe_statics)
5605 guard_addr = build_address (guard);
5606 guard_addr_list = build_tree_list (NULL_TREE, guard_addr);
5608 acquire_fn = get_identifier ("__cxa_guard_acquire");
5609 release_fn = get_identifier ("__cxa_guard_release");
5610 abort_fn = get_identifier ("__cxa_guard_abort");
5611 if (!get_global_value_if_present (acquire_fn, &acquire_fn))
5613 tree argtypes = tree_cons (NULL_TREE, TREE_TYPE (guard_addr),
5615 tree vfntype = build_function_type (void_type_node, argtypes);
5616 acquire_fn = push_library_fn
5617 (acquire_fn, build_function_type (integer_type_node, argtypes));
5618 release_fn = push_library_fn (release_fn, vfntype);
5619 abort_fn = push_library_fn (abort_fn, vfntype);
5623 release_fn = identifier_global_value (release_fn);
5624 abort_fn = identifier_global_value (abort_fn);
5627 inner_if_stmt = begin_if_stmt ();
5628 finish_if_stmt_cond (build_call (acquire_fn, guard_addr_list),
5631 inner_then_clause = begin_compound_stmt (BCS_NO_SCOPE);
5632 begin = get_target_expr (boolean_false_node);
5633 flag = TARGET_EXPR_SLOT (begin);
5635 TARGET_EXPR_CLEANUP (begin)
5636 = build3 (COND_EXPR, void_type_node, flag,
5638 build_call (abort_fn, guard_addr_list));
5639 CLEANUP_EH_ONLY (begin) = 1;
5641 /* Do the initialization itself. */
5642 init = add_stmt_to_compound (begin, init);
5643 init = add_stmt_to_compound
5644 (init, build2 (MODIFY_EXPR, void_type_node, flag, boolean_true_node));
5645 init = add_stmt_to_compound
5646 (init, build_call (release_fn, guard_addr_list));
5649 init = add_stmt_to_compound (init, set_guard (guard));
5651 /* Use atexit to register a function for destroying this static
5653 init = add_stmt_to_compound (init, register_dtor_fn (decl));
5655 finish_expr_stmt (init);
5657 if (flag_threadsafe_statics)
5659 finish_compound_stmt (inner_then_clause);
5660 finish_then_clause (inner_if_stmt);
5661 finish_if_stmt (inner_if_stmt);
5664 if (!targetm.relaxed_ordering || !flag_threadsafe_statics)
5666 finish_compound_stmt (then_clause);
5667 finish_then_clause (if_stmt);
5668 finish_if_stmt (if_stmt);
5672 static_aggregates = tree_cons (init, decl, static_aggregates);
5676 /* Make TYPE a complete type based on INITIAL_VALUE.
5677 Return 0 if successful, 1 if INITIAL_VALUE can't be deciphered,
5678 2 if there was no information (in which case assume 0 if DO_DEFAULT),
5679 3 if the initializer list is empty (in pedantic mode). */
5682 cp_complete_array_type (tree *ptype, tree initial_value, bool do_default)
5685 tree type, elt_type;
5689 /* An array of character type can be initialized from a
5690 brace-enclosed string constant.
5692 FIXME: this code is duplicated from reshape_init. Probably
5693 we should just call reshape_init here? */
5694 if (char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (*ptype)))
5695 && TREE_CODE (initial_value) == CONSTRUCTOR
5696 && !VEC_empty (constructor_elt, CONSTRUCTOR_ELTS (initial_value)))
5698 VEC(constructor_elt,gc) *v = CONSTRUCTOR_ELTS (initial_value);
5699 tree value = VEC_index (constructor_elt, v, 0)->value;
5701 if (TREE_CODE (value) == STRING_CST
5702 && VEC_length (constructor_elt, v) == 1)
5703 initial_value = value;
5707 failure = complete_array_type (ptype, initial_value, do_default);
5709 /* We can create the array before the element type is complete, which
5710 means that we didn't have these two bits set in the original type
5711 either. In completing the type, we are expected to propagate these
5712 bits. See also complete_type which does the same thing for arrays
5715 if (TYPE_DOMAIN (type))
5717 elt_type = TREE_TYPE (type);
5718 TYPE_NEEDS_CONSTRUCTING (type) = TYPE_NEEDS_CONSTRUCTING (elt_type);
5719 TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type)
5720 = TYPE_HAS_NONTRIVIAL_DESTRUCTOR (elt_type);
5726 /* Return zero if something is declared to be a member of type
5727 CTYPE when in the context of CUR_TYPE. STRING is the error
5728 message to print in that case. Otherwise, quietly return 1. */
5731 member_function_or_else (tree ctype, tree cur_type, enum overload_flags flags)
5733 if (ctype && ctype != cur_type)
5735 if (flags == DTOR_FLAG)
5736 error ("destructor for alien class %qT cannot be a member", ctype);
5738 error ("constructor for alien class %qT cannot be a member", ctype);
5744 /* Subroutine of `grokdeclarator'. */
5746 /* Generate errors possibly applicable for a given set of specifiers.
5747 This is for ARM $7.1.2. */
5750 bad_specifiers (tree object,
5759 error ("%qD declared as a %<virtual%> %s", object, type);
5761 error ("%qD declared as an %<inline%> %s", object, type);
5763 error ("%<const%> and %<volatile%> function specifiers on "
5764 "%qD invalid in %s declaration",
5767 error ("%q+D declared as a friend", object);
5769 && (TREE_CODE (object) == TYPE_DECL
5770 || (!TYPE_PTRFN_P (TREE_TYPE (object))
5771 && !TYPE_REFFN_P (TREE_TYPE (object))
5772 && !TYPE_PTRMEMFUNC_P (TREE_TYPE (object)))))
5773 error ("%q+D declared with an exception specification", object);
5776 /* DECL is a member function or static data member and is presently
5777 being defined. Check that the definition is taking place in a
5781 check_class_member_definition_namespace (tree decl)
5783 /* These checks only apply to member functions and static data
5785 gcc_assert (TREE_CODE (decl) == FUNCTION_DECL
5786 || TREE_CODE (decl) == VAR_DECL);
5787 /* We check for problems with specializations in pt.c in
5788 check_specialization_namespace, where we can issue better
5790 if (processing_specialization)
5792 /* There are no restrictions on the placement of
5793 explicit instantiations. */
5794 if (processing_explicit_instantiation)
5798 A member function definition that appears outside of the
5799 class definition shall appear in a namespace scope enclosing
5800 the class definition.
5804 The definition for a static data member shall appear in a
5805 namespace scope enclosing the member's class definition. */
5806 if (!is_ancestor (current_namespace, DECL_CONTEXT (decl)))
5807 pedwarn ("definition of %qD is not in namespace enclosing %qT",
5808 decl, DECL_CONTEXT (decl));
5811 /* Build a PARM_DECL for the "this" parameter. TYPE is the
5812 METHOD_TYPE for a non-static member function; QUALS are the
5813 cv-qualifiers that apply to the function. */
5816 build_this_parm (tree type, cp_cv_quals quals)
5821 cp_cv_quals this_quals;
5823 this_type = TREE_VALUE (TYPE_ARG_TYPES (type));
5824 /* The `this' parameter is implicitly `const'; it cannot be
5826 this_quals = (quals & TYPE_QUAL_RESTRICT) | TYPE_QUAL_CONST;
5827 qual_type = cp_build_qualified_type (this_type, this_quals);
5828 parm = build_artificial_parm (this_identifier, qual_type);
5829 cp_apply_type_quals_to_decl (this_quals, parm);
5833 /* CTYPE is class type, or null if non-class.
5834 TYPE is type this FUNCTION_DECL should have, either FUNCTION_TYPE
5836 DECLARATOR is the function's name.
5837 PARMS is a chain of PARM_DECLs for the function.
5838 VIRTUALP is truthvalue of whether the function is virtual or not.
5839 FLAGS are to be passed through to `grokclassfn'.
5840 QUALS are qualifiers indicating whether the function is `const'
5842 RAISES is a list of exceptions that this function can raise.
5843 CHECK is 1 if we must find this method in CTYPE, 0 if we should
5844 not look, and -1 if we should not call `grokclassfn' at all.
5846 SFK is the kind of special function (if any) for the new function.
5848 Returns `NULL_TREE' if something goes wrong, after issuing
5849 applicable error messages. */
5852 grokfndecl (tree ctype,
5856 tree orig_declarator,
5858 enum overload_flags flags,
5865 special_function_kind sfk,
5872 int staticp = ctype && TREE_CODE (type) == FUNCTION_TYPE;
5876 type = build_exception_variant (type, raises);
5878 decl = build_lang_decl (FUNCTION_DECL, declarator, type);
5879 if (TREE_CODE (type) == METHOD_TYPE)
5882 parm = build_this_parm (type, quals);
5883 TREE_CHAIN (parm) = parms;
5886 DECL_ARGUMENTS (decl) = parms;
5887 /* Propagate volatile out from type to decl. */
5888 if (TYPE_VOLATILE (type))
5889 TREE_THIS_VOLATILE (decl) = 1;
5892 && TREE_CODE (orig_declarator) == TEMPLATE_ID_EXPR)
5896 ("defining explicit specialization %qD in friend declaration",
5900 tree fns = TREE_OPERAND (orig_declarator, 0);
5901 tree args = TREE_OPERAND (orig_declarator, 1);
5903 if (PROCESSING_REAL_TEMPLATE_DECL_P ())
5905 /* Something like `template <class T> friend void f<T>()'. */
5906 error ("invalid use of template-id %qD in declaration "
5907 "of primary template",
5913 /* A friend declaration of the form friend void f<>(). Record
5914 the information in the TEMPLATE_ID_EXPR. */
5915 SET_DECL_IMPLICIT_INSTANTIATION (decl);
5917 if (TREE_CODE (fns) == COMPONENT_REF)
5919 /* Due to bison parser ickiness, we will have already looked
5920 up an operator_name or PFUNCNAME within the current class
5921 (see template_id in parse.y). If the current class contains
5922 such a name, we'll get a COMPONENT_REF here. Undo that. */
5924 gcc_assert (TREE_TYPE (TREE_OPERAND (fns, 0))
5925 == current_class_type);
5926 fns = TREE_OPERAND (fns, 1);
5928 gcc_assert (TREE_CODE (fns) == IDENTIFIER_NODE
5929 || TREE_CODE (fns) == OVERLOAD);
5930 DECL_TEMPLATE_INFO (decl) = tree_cons (fns, args, NULL_TREE);
5932 for (t = TYPE_ARG_TYPES (TREE_TYPE (decl)); t; t = TREE_CHAIN (t))
5933 if (TREE_PURPOSE (t)
5934 && TREE_CODE (TREE_PURPOSE (t)) == DEFAULT_ARG)
5936 error ("default arguments are not allowed in declaration "
5937 "of friend template specialization %qD",
5944 error ("%<inline%> is not allowed in declaration of friend "
5945 "template specialization %qD",
5952 /* If this decl has namespace scope, set that up. */
5954 set_decl_namespace (decl, in_namespace, friendp);
5956 DECL_CONTEXT (decl) = FROB_CONTEXT (current_namespace);
5958 /* `main' and builtins have implicit 'C' linkage. */
5959 if ((MAIN_NAME_P (declarator)
5960 || (IDENTIFIER_LENGTH (declarator) > 10
5961 && IDENTIFIER_POINTER (declarator)[0] == '_'
5962 && IDENTIFIER_POINTER (declarator)[1] == '_'
5963 && strncmp (IDENTIFIER_POINTER (declarator)+2, "builtin_", 8) == 0))
5964 && current_lang_name == lang_name_cplusplus
5965 && ctype == NULL_TREE
5966 /* NULL_TREE means global namespace. */
5967 && DECL_CONTEXT (decl) == NULL_TREE)
5968 SET_DECL_LANGUAGE (decl, lang_c);
5970 /* Should probably propagate const out from type to decl I bet (mrs). */
5973 DECL_STATIC_FUNCTION_P (decl) = 1;
5974 DECL_CONTEXT (decl) = ctype;
5979 DECL_CONTEXT (decl) = ctype;
5981 check_class_member_definition_namespace (decl);
5984 if (ctype == NULL_TREE && DECL_MAIN_P (decl))
5986 if (processing_template_decl)
5987 error ("cannot declare %<::main%> to be a template");
5989 error ("cannot declare %<::main%> to be inline");
5991 error ("cannot declare %<::main%> to be static");
5992 if (!same_type_p (TREE_TYPE (TREE_TYPE (decl)),
5995 tree oldtypeargs = TYPE_ARG_TYPES (TREE_TYPE (decl));
5997 error ("%<::main%> must return %<int%>");
5998 newtype = build_function_type (integer_type_node,
6000 TREE_TYPE (decl) = newtype;
6006 /* Members of anonymous types and local classes have no linkage; make
6007 them internal. If a typedef is made later, this will be changed. */
6008 if (ctype && (TYPE_ANONYMOUS_P (ctype)
6009 || decl_function_context (TYPE_MAIN_DECL (ctype))))
6014 /* [basic.link]: A name with no linkage (notably, the name of a class
6015 or enumeration declared in a local scope) shall not be used to
6016 declare an entity with linkage.
6018 Only check this for public decls for now. See core 319, 389. */
6019 t = no_linkage_check (TREE_TYPE (decl),
6020 /*relaxed_p=*/false);
6023 if (TYPE_ANONYMOUS_P (t))
6025 if (DECL_EXTERN_C_P (decl))
6026 /* Allow this; it's pretty common in C. */;
6029 pedwarn ("non-local function %q#D uses anonymous type",
6031 if (DECL_ORIGINAL_TYPE (TYPE_NAME (t)))
6032 pedwarn ("%q+#D does not refer to the unqualified "
6033 "type, so it is not used for linkage",
6038 pedwarn ("non-local function %q#D uses local type %qT", decl, t);
6042 TREE_PUBLIC (decl) = publicp;
6045 DECL_INTERFACE_KNOWN (decl) = 1;
6046 DECL_NOT_REALLY_EXTERN (decl) = 1;
6049 /* If the declaration was declared inline, mark it as such. */
6051 DECL_DECLARED_INLINE_P (decl) = 1;
6052 /* We inline functions that are explicitly declared inline, or, when
6053 the user explicitly asks us to, all functions. */
6054 if (DECL_DECLARED_INLINE_P (decl)
6055 || (flag_inline_trees == 2 && !DECL_INLINE (decl) && funcdef_flag))
6056 DECL_INLINE (decl) = 1;
6058 DECL_EXTERNAL (decl) = 1;
6059 if (quals && TREE_CODE (type) == FUNCTION_TYPE)
6061 error ("%smember function %qD cannot have cv-qualifier",
6062 (ctype ? "static " : "non-"), decl);
6063 quals = TYPE_UNQUALIFIED;
6066 if (IDENTIFIER_OPNAME_P (DECL_NAME (decl)))
6067 grok_op_properties (decl, /*complain=*/true);
6069 if (ctype && decl_function_context (decl))
6070 DECL_NO_STATIC_CHAIN (decl) = 1;
6073 /* Make the init_value nonzero so pushdecl knows this is not
6074 tentative. error_mark_node is replaced later with the BLOCK. */
6075 DECL_INITIAL (decl) = error_mark_node;
6077 if (TYPE_NOTHROW_P (type) || nothrow_libfn_p (decl))
6078 TREE_NOTHROW (decl) = 1;
6080 /* Caller will do the rest of this. */
6084 if (ctype != NULL_TREE)
6086 if (sfk == sfk_constructor)
6087 DECL_CONSTRUCTOR_P (decl) = 1;
6089 grokclassfn (ctype, decl, flags);
6092 decl = check_explicit_specialization (orig_declarator, decl,
6095 4 * (friendp != 0));
6096 if (decl == error_mark_node)
6101 cplus_decl_attributes (&decl, *attrlist, 0);
6102 *attrlist = NULL_TREE;
6105 if (ctype != NULL_TREE
6106 && (! TYPE_FOR_JAVA (ctype) || check_java_method (decl))
6111 old_decl = check_classfn (ctype, decl,
6112 (processing_template_decl
6113 > template_class_depth (ctype))
6114 ? current_template_parms
6121 if (TREE_CODE (old_decl) == TEMPLATE_DECL)
6122 /* Because grokfndecl is always supposed to return a
6123 FUNCTION_DECL, we pull out the DECL_TEMPLATE_RESULT
6124 here. We depend on our callers to figure out that its
6125 really a template that's being returned. */
6126 old_decl = DECL_TEMPLATE_RESULT (old_decl);
6128 if (DECL_STATIC_FUNCTION_P (old_decl)
6129 && TREE_CODE (TREE_TYPE (decl)) == METHOD_TYPE)
6130 /* Remove the `this' parm added by grokclassfn.
6131 XXX Isn't this done in start_function, too? */
6132 revert_static_member_fn (decl);
6133 if (DECL_ARTIFICIAL (old_decl))
6134 error ("definition of implicitly-declared %qD", old_decl);
6136 /* Since we've smashed OLD_DECL to its
6137 DECL_TEMPLATE_RESULT, we must do the same to DECL. */
6138 if (TREE_CODE (decl) == TEMPLATE_DECL)
6139 decl = DECL_TEMPLATE_RESULT (decl);
6141 /* Attempt to merge the declarations. This can fail, in
6142 the case of some invalid specialization declarations. */
6143 pushed_scope = push_scope (ctype);
6144 ok = duplicate_decls (decl, old_decl, friendp);
6146 pop_scope (pushed_scope);
6149 error ("no %q#D member function declared in class %qT",
6157 if (DECL_CONSTRUCTOR_P (decl) && !grok_ctor_properties (ctype, decl))
6160 if (ctype == NULL_TREE || check)
6164 DECL_VIRTUAL_P (decl) = 1;
6169 /* DECL is a VAR_DECL for a static data member. Set flags to reflect
6170 the linkage that DECL will receive in the object file. */
6173 set_linkage_for_static_data_member (tree decl)
6175 /* A static data member always has static storage duration and
6176 external linkage. Note that static data members are forbidden in
6177 local classes -- the only situation in which a class has
6178 non-external linkage. */
6179 TREE_PUBLIC (decl) = 1;
6180 TREE_STATIC (decl) = 1;
6181 /* For non-template classes, static data members are always put
6182 out in exactly those files where they are defined, just as
6183 with ordinary namespace-scope variables. */
6184 if (!processing_template_decl)
6185 DECL_INTERFACE_KNOWN (decl) = 1;
6188 /* Create a VAR_DECL named NAME with the indicated TYPE.
6190 If SCOPE is non-NULL, it is the class type or namespace containing
6191 the variable. If SCOPE is NULL, the variable should is created in
6192 the innermost enclosings scope. */
6195 grokvardecl (tree type,
6197 const cp_decl_specifier_seq *declspecs,
6203 tree explicit_scope;
6205 gcc_assert (!name || TREE_CODE (name) == IDENTIFIER_NODE);
6207 /* Compute the scope in which to place the variable, but remember
6208 whether or not that scope was explicitly specified by the user. */
6209 explicit_scope = scope;
6212 /* An explicit "extern" specifier indicates a namespace-scope
6214 if (declspecs->storage_class == sc_extern)
6215 scope = current_namespace;
6216 else if (!at_function_scope_p ())
6217 scope = current_scope ();
6221 && (/* If the variable is a namespace-scope variable declared in a
6222 template, we need DECL_LANG_SPECIFIC. */
6223 (TREE_CODE (scope) == NAMESPACE_DECL && processing_template_decl)
6224 /* Similarly for namespace-scope variables with language linkage
6226 || (TREE_CODE (scope) == NAMESPACE_DECL
6227 && current_lang_name != lang_name_cplusplus)
6228 /* Similarly for static data members. */
6230 decl = build_lang_decl (VAR_DECL, name, type);
6232 decl = build_decl (VAR_DECL, name, type);
6234 if (explicit_scope && TREE_CODE (explicit_scope) == NAMESPACE_DECL)
6235 set_decl_namespace (decl, explicit_scope, 0);
6237 DECL_CONTEXT (decl) = scope;
6239 if (declspecs->storage_class == sc_extern)
6241 DECL_THIS_EXTERN (decl) = 1;
6242 DECL_EXTERNAL (decl) = !initialized;
6245 if (DECL_CLASS_SCOPE_P (decl))
6247 set_linkage_for_static_data_member (decl);
6248 /* This function is only called with out-of-class definitions. */
6249 DECL_EXTERNAL (decl) = 0;
6250 check_class_member_definition_namespace (decl);
6252 /* At top level, either `static' or no s.c. makes a definition
6253 (perhaps tentative), and absence of `static' makes it public. */
6254 else if (toplevel_bindings_p ())
6256 TREE_PUBLIC (decl) = (declspecs->storage_class != sc_static
6257 && (DECL_THIS_EXTERN (decl) || ! constp));
6258 TREE_STATIC (decl) = ! DECL_EXTERNAL (decl);
6260 /* Not at top level, only `static' makes a static definition. */
6263 TREE_STATIC (decl) = declspecs->storage_class == sc_static;
6264 TREE_PUBLIC (decl) = DECL_EXTERNAL (decl);
6267 if (declspecs->specs[(int)ds_thread])
6269 if (targetm.have_tls)
6270 DECL_TLS_MODEL (decl) = decl_default_tls_model (decl);
6272 /* A mere warning is sure to result in improper semantics
6273 at runtime. Don't bother to allow this to compile. */
6274 error ("thread-local storage not supported for this target");
6277 if (TREE_PUBLIC (decl))
6279 /* [basic.link]: A name with no linkage (notably, the name of a class
6280 or enumeration declared in a local scope) shall not be used to
6281 declare an entity with linkage.
6283 Only check this for public decls for now. */
6284 tree t = no_linkage_check (TREE_TYPE (decl), /*relaxed_p=*/false);
6287 if (TYPE_ANONYMOUS_P (t))
6289 if (DECL_EXTERN_C_P (decl))
6290 /* Allow this; it's pretty common in C. */
6294 /* DRs 132, 319 and 389 seem to indicate types with
6295 no linkage can only be used to declare extern "C"
6296 entities. Since it's not always an error in the
6297 ISO C++ 90 Standard, we only issue a warning. */
6298 warning (0, "non-local variable %q#D uses anonymous type",
6300 if (DECL_ORIGINAL_TYPE (TYPE_NAME (t)))
6301 warning (0, "%q+#D does not refer to the unqualified "
6302 "type, so it is not used for linkage",
6307 warning (0, "non-local variable %q#D uses local type %qT", decl, t);
6311 DECL_INTERFACE_KNOWN (decl) = 1;
6316 /* Create and return a canonical pointer to member function type, for
6317 TYPE, which is a POINTER_TYPE to a METHOD_TYPE. */
6320 build_ptrmemfunc_type (tree type)
6324 tree unqualified_variant = NULL_TREE;
6326 if (type == error_mark_node)
6329 /* If a canonical type already exists for this type, use it. We use
6330 this method instead of type_hash_canon, because it only does a
6331 simple equality check on the list of field members. */
6333 if ((t = TYPE_GET_PTRMEMFUNC_TYPE (type)))
6336 /* Make sure that we always have the unqualified pointer-to-member
6338 if (cp_type_quals (type) != TYPE_UNQUALIFIED)
6340 = build_ptrmemfunc_type (TYPE_MAIN_VARIANT (type));
6342 t = make_aggr_type (RECORD_TYPE);
6343 xref_basetypes (t, NULL_TREE);
6345 /* Let the front-end know this is a pointer to member function... */
6346 TYPE_PTRMEMFUNC_FLAG (t) = 1;
6347 /* ... and not really an aggregate. */
6348 SET_IS_AGGR_TYPE (t, 0);
6350 field = build_decl (FIELD_DECL, pfn_identifier, type);
6353 field = build_decl (FIELD_DECL, delta_identifier, delta_type_node);
6354 TREE_CHAIN (field) = fields;
6357 finish_builtin_struct (t, "__ptrmemfunc_type", fields, ptr_type_node);
6359 /* Zap out the name so that the back-end will give us the debugging
6360 information for this anonymous RECORD_TYPE. */
6361 TYPE_NAME (t) = NULL_TREE;
6363 /* If this is not the unqualified form of this pointer-to-member
6364 type, set the TYPE_MAIN_VARIANT for this type to be the
6365 unqualified type. Since they are actually RECORD_TYPEs that are
6366 not variants of each other, we must do this manually. */
6367 if (cp_type_quals (type) != TYPE_UNQUALIFIED)
6369 t = build_qualified_type (t, cp_type_quals (type));
6370 TYPE_MAIN_VARIANT (t) = unqualified_variant;
6371 TYPE_NEXT_VARIANT (t) = TYPE_NEXT_VARIANT (unqualified_variant);
6372 TYPE_NEXT_VARIANT (unqualified_variant) = t;
6375 /* Cache this pointer-to-member type so that we can find it again
6377 TYPE_SET_PTRMEMFUNC_TYPE (type, t);
6382 /* Create and return a pointer to data member type. */
6385 build_ptrmem_type (tree class_type, tree member_type)
6387 if (TREE_CODE (member_type) == METHOD_TYPE)
6391 arg_types = TYPE_ARG_TYPES (member_type);
6392 class_type = (cp_build_qualified_type
6394 cp_type_quals (TREE_TYPE (TREE_VALUE (arg_types)))));
6396 = build_method_type_directly (class_type,
6397 TREE_TYPE (member_type),
6398 TREE_CHAIN (arg_types));
6399 return build_ptrmemfunc_type (build_pointer_type (member_type));
6403 gcc_assert (TREE_CODE (member_type) != FUNCTION_TYPE);
6404 return build_offset_type (class_type, member_type);
6408 /* DECL is a VAR_DECL defined in-class, whose TYPE is also given.
6409 Check to see that the definition is valid. Issue appropriate error
6410 messages. Return 1 if the definition is particularly bad, or 0
6414 check_static_variable_definition (tree decl, tree type)
6416 /* Motion 10 at San Diego: If a static const integral data member is
6417 initialized with an integral constant expression, the initializer
6418 may appear either in the declaration (within the class), or in
6419 the definition, but not both. If it appears in the class, the
6420 member is a member constant. The file-scope definition is always
6422 if (!ARITHMETIC_TYPE_P (type) && TREE_CODE (type) != ENUMERAL_TYPE)
6424 error ("invalid in-class initialization of static data member "
6425 "of non-integral type %qT",
6427 /* If we just return the declaration, crashes will sometimes
6428 occur. We therefore return void_type_node, as if this were a
6429 friend declaration, to cause callers to completely ignore
6430 this declaration. */
6433 else if (!CP_TYPE_CONST_P (type))
6434 error ("ISO C++ forbids in-class initialization of non-const "
6435 "static member %qD",
6437 else if (pedantic && !INTEGRAL_TYPE_P (type))
6438 pedwarn ("ISO C++ forbids initialization of member constant "
6439 "%qD of non-integral type %qT", decl, type);
6444 /* Given the SIZE (i.e., number of elements) in an array, compute an
6445 appropriate index type for the array. If non-NULL, NAME is the
6446 name of the thing being declared. */
6449 compute_array_index_type (tree name, tree size)
6454 if (error_operand_p (size))
6455 return error_mark_node;
6457 type = TREE_TYPE (size);
6458 /* The array bound must be an integer type. */
6459 if (!dependent_type_p (type) && !INTEGRAL_TYPE_P (type))
6462 error ("size of array %qD has non-integral type %qT", name, type);
6464 error ("size of array has non-integral type %qT", type);
6465 size = integer_one_node;
6466 type = TREE_TYPE (size);
6469 if (abi_version_at_least (2)
6470 /* We should only handle value dependent expressions specially. */
6471 ? value_dependent_expression_p (size)
6472 /* But for abi-1, we handled all instances in templates. This
6473 effects the manglings produced. */
6474 : processing_template_decl)
6475 return build_index_type (build_min (MINUS_EXPR, sizetype,
6476 size, integer_one_node));
6478 /* The size might be the result of a cast. */
6479 STRIP_TYPE_NOPS (size);
6481 /* It might be a const variable or enumeration constant. */
6482 size = integral_constant_value (size);
6484 /* Normally, the array-bound will be a constant. */
6485 if (TREE_CODE (size) == INTEGER_CST)
6487 /* Check to see if the array bound overflowed. Make that an
6488 error, no matter how generous we're being. */
6489 int old_flag_pedantic_errors = flag_pedantic_errors;
6490 int old_pedantic = pedantic;
6491 pedantic = flag_pedantic_errors = 1;
6492 constant_expression_warning (size);
6493 pedantic = old_pedantic;
6494 flag_pedantic_errors = old_flag_pedantic_errors;
6496 /* An array must have a positive number of elements. */
6497 if (INT_CST_LT (size, integer_zero_node))
6500 error ("size of array %qD is negative", name);
6502 error ("size of array is negative");
6503 size = integer_one_node;
6505 /* As an extension we allow zero-sized arrays. We always allow
6506 them in system headers because glibc uses them. */
6507 else if (integer_zerop (size) && pedantic && !in_system_header)
6510 pedwarn ("ISO C++ forbids zero-size array %qD", name);
6512 pedwarn ("ISO C++ forbids zero-size array");
6515 else if (TREE_CONSTANT (size))
6517 /* `(int) &fn' is not a valid array bound. */
6519 error ("size of array %qD is not an integral constant-expression",
6522 error ("size of array is not an integral constant-expression");
6523 size = integer_one_node;
6528 pedwarn ("ISO C++ forbids variable-size array %qD", name);
6530 pedwarn ("ISO C++ forbids variable-size array");
6533 if (processing_template_decl && !TREE_CONSTANT (size))
6534 /* A variable sized array. */
6535 itype = build_min (MINUS_EXPR, sizetype, size, integer_one_node);
6538 HOST_WIDE_INT saved_processing_template_decl;
6540 /* Compute the index of the largest element in the array. It is
6541 one less than the number of elements in the array. We save
6542 and restore PROCESSING_TEMPLATE_DECL so that computations in
6543 cp_build_binary_op will be appropriately folded. */
6544 saved_processing_template_decl = processing_template_decl;
6545 processing_template_decl = 0;
6546 itype = cp_build_binary_op (MINUS_EXPR,
6547 cp_convert (ssizetype, size),
6548 cp_convert (ssizetype, integer_one_node));
6549 itype = fold (itype);
6550 processing_template_decl = saved_processing_template_decl;
6552 if (!TREE_CONSTANT (itype))
6553 /* A variable sized array. */
6554 itype = variable_size (itype);
6555 /* Make sure that there was no overflow when creating to a signed
6556 index type. (For example, on a 32-bit machine, an array with
6557 size 2^32 - 1 is too big.) */
6558 else if (TREE_CODE (itype) == INTEGER_CST
6559 && TREE_OVERFLOW (itype))
6561 error ("overflow in array dimension");
6562 TREE_OVERFLOW (itype) = 0;
6566 /* Create and return the appropriate index type. */
6567 return build_index_type (itype);
6570 /* Returns the scope (if any) in which the entity declared by
6571 DECLARATOR will be located. If the entity was declared with an
6572 unqualified name, NULL_TREE is returned. */
6575 get_scope_of_declarator (const cp_declarator *declarator)
6577 while (declarator && declarator->kind != cdk_id)
6578 declarator = declarator->declarator;
6580 /* If the declarator-id is a SCOPE_REF, the scope in which the
6581 declaration occurs is the first operand. */
6583 && declarator->u.id.qualifying_scope)
6584 return declarator->u.id.qualifying_scope;
6586 /* Otherwise, the declarator is not a qualified name; the entity will
6587 be declared in the current scope. */
6591 /* Returns an ARRAY_TYPE for an array with SIZE elements of the
6592 indicated TYPE. If non-NULL, NAME is the NAME of the declaration
6596 create_array_type_for_decl (tree name, tree type, tree size)
6598 tree itype = NULL_TREE;
6599 const char* error_msg;
6601 /* If things have already gone awry, bail now. */
6602 if (type == error_mark_node || size == error_mark_node)
6603 return error_mark_node;
6605 /* Assume that everything will go OK. */
6608 /* There are some types which cannot be array elements. */
6609 switch (TREE_CODE (type))
6612 error_msg = "array of void";
6616 error_msg = "array of functions";
6619 case REFERENCE_TYPE:
6620 error_msg = "array of references";
6624 error_msg = "array of function members";
6631 /* If something went wrong, issue an error-message and return. */
6635 error ("declaration of %qD as %s", name, error_msg);
6637 error ("creating %s", error_msg);
6639 return error_mark_node;
6644 The constant expressions that specify the bounds of the arrays
6645 can be omitted only for the first member of the sequence. */
6646 if (TREE_CODE (type) == ARRAY_TYPE && !TYPE_DOMAIN (type))
6649 error ("declaration of %qD as multidimensional array must "
6650 "have bounds for all dimensions except the first",
6653 error ("multidimensional array must have bounds for all "
6654 "dimensions except the first");
6656 return error_mark_node;
6659 /* Figure out the index type for the array. */
6661 itype = compute_array_index_type (name, size);
6664 T is called the array element type; this type shall not be [...] an
6665 abstract class type. */
6666 abstract_virtuals_error (name, type);
6668 return build_cplus_array_type (type, itype);
6671 /* Check that it's OK to declare a function with the indicated TYPE.
6672 SFK indicates the kind of special function (if any) that this
6673 function is. OPTYPE is the type given in a conversion operator
6674 declaration, or the class type for a constructor/destructor.
6675 Returns the actual return type of the function; that
6676 may be different than TYPE if an error occurs, or for certain
6677 special functions. */
6680 check_special_function_return_type (special_function_kind sfk,
6686 case sfk_constructor:
6688 error ("return type specification for constructor invalid");
6690 if (targetm.cxx.cdtor_returns_this () && !TYPE_FOR_JAVA (optype))
6691 type = build_pointer_type (optype);
6693 type = void_type_node;
6696 case sfk_destructor:
6698 error ("return type specification for destructor invalid");
6699 /* We can't use the proper return type here because we run into
6700 problems with ambiguous bases and covariant returns.
6701 Java classes are left unchanged because (void *) isn't a valid
6702 Java type, and we don't want to change the Java ABI. */
6703 if (targetm.cxx.cdtor_returns_this () && !TYPE_FOR_JAVA (optype))
6704 type = build_pointer_type (void_type_node);
6706 type = void_type_node;
6709 case sfk_conversion:
6710 if (type && !same_type_p (type, optype))
6711 error ("operator %qT declared to return %qT", optype, type);
6713 pedwarn ("return type specified for %<operator %T%>", optype);
6724 /* A variable or data member (whose unqualified name is IDENTIFIER)
6725 has been declared with the indicated TYPE. If the TYPE is not
6726 acceptable, issue an error message and return a type to use for
6727 error-recovery purposes. */
6730 check_var_type (tree identifier, tree type)
6732 if (VOID_TYPE_P (type))
6735 error ("unnamed variable or field declared void");
6736 else if (TREE_CODE (identifier) == IDENTIFIER_NODE)
6738 gcc_assert (!IDENTIFIER_OPNAME_P (identifier));
6739 error ("variable or field %qE declared void", identifier);
6742 error ("variable or field declared void");
6743 type = integer_type_node;
6749 /* Given declspecs and a declarator (abstract or otherwise), determine
6750 the name and type of the object declared and construct a DECL node
6753 DECLSPECS is a chain of tree_list nodes whose value fields
6754 are the storage classes and type specifiers.
6756 DECL_CONTEXT says which syntactic context this declaration is in:
6757 NORMAL for most contexts. Make a VAR_DECL or FUNCTION_DECL or TYPE_DECL.
6758 FUNCDEF for a function definition. Like NORMAL but a few different
6759 error messages in each case. Return value may be zero meaning
6760 this definition is too screwy to try to parse.
6761 MEMFUNCDEF for a function definition. Like FUNCDEF but prepares to
6762 handle member functions (which have FIELD context).
6763 Return value may be zero meaning this definition is too screwy to
6765 PARM for a parameter declaration (either within a function prototype
6766 or before a function body). Make a PARM_DECL, or return void_type_node.
6767 CATCHPARM for a parameter declaration before a catch clause.
6768 TYPENAME if for a typename (in a cast or sizeof).
6769 Don't make a DECL node; just return the ..._TYPE node.
6770 FIELD for a struct or union field; make a FIELD_DECL.
6771 BITFIELD for a field with specified width.
6772 INITIALIZED is 1 if the decl has an initializer.
6774 ATTRLIST is a pointer to the list of attributes, which may be NULL
6775 if there are none; *ATTRLIST may be modified if attributes from inside
6776 the declarator should be applied to the declaration.
6778 When this function is called, scoping variables (such as
6779 CURRENT_CLASS_TYPE) should reflect the scope in which the
6780 declaration occurs, not the scope in which the new declaration will
6781 be placed. For example, on:
6785 when grokdeclarator is called for `S::f', the CURRENT_CLASS_TYPE
6786 should not be `S'. */
6789 grokdeclarator (const cp_declarator *declarator,
6790 const cp_decl_specifier_seq *declspecs,
6791 enum decl_context decl_context,
6795 tree type = NULL_TREE;
6797 int virtualp, explicitp, friendp, inlinep, staticp;
6798 int explicit_int = 0;
6799 int explicit_char = 0;
6800 int defaulted_int = 0;
6801 tree dependent_name = NULL_TREE;
6803 tree typedef_decl = NULL_TREE;
6804 const char *name = NULL;
6805 tree typedef_type = NULL_TREE;
6806 /* True if this declarator is a function definition. */
6807 bool funcdef_flag = false;
6808 cp_declarator_kind innermost_code = cdk_error;
6811 /* See the code below that used this. */
6812 tree decl_attr = NULL_TREE;
6815 /* Keep track of what sort of function is being processed
6816 so that we can warn about default return values, or explicit
6817 return values which do not match prescribed defaults. */
6818 special_function_kind sfk = sfk_none;
6820 tree dname = NULL_TREE;
6821 tree ctor_return_type = NULL_TREE;
6822 enum overload_flags flags = NO_SPECIAL;
6823 /* cv-qualifiers that apply to the declarator, for a declaration of
6824 a member function. */
6825 cp_cv_quals memfn_quals = TYPE_UNQUALIFIED;
6826 /* cv-qualifiers that apply to the type specified by the DECLSPECS. */
6828 tree raises = NULL_TREE;
6829 int template_count = 0;
6830 tree returned_attrs = NULL_TREE;
6831 tree parms = NULL_TREE;
6832 const cp_declarator *id_declarator;
6833 /* The unqualified name of the declarator; either an
6834 IDENTIFIER_NODE, BIT_NOT_EXPR, or TEMPLATE_ID_EXPR. */
6835 tree unqualified_id;
6836 /* The class type, if any, in which this entity is located,
6837 or NULL_TREE if none. Note that this value may be different from
6838 the current class type; for example if an attempt is made to declare
6839 "A::f" inside "B", this value will be "A". */
6840 tree ctype = current_class_type;
6841 /* The NAMESPACE_DECL for the namespace in which this entity is
6842 located. If an unqualified name is used to declare the entity,
6843 this value will be NULL_TREE, even if the entity is located at
6845 tree in_namespace = NULL_TREE;
6846 cp_storage_class storage_class;
6847 bool unsigned_p, signed_p, short_p, long_p, thread_p;
6848 bool type_was_error_mark_node = false;
6850 signed_p = declspecs->specs[(int)ds_signed];
6851 unsigned_p = declspecs->specs[(int)ds_unsigned];
6852 short_p = declspecs->specs[(int)ds_short];
6853 long_p = declspecs->specs[(int)ds_long];
6854 longlong = declspecs->specs[(int)ds_long] >= 2;
6855 thread_p = declspecs->specs[(int)ds_thread];
6857 if (decl_context == FUNCDEF)
6858 funcdef_flag = true, decl_context = NORMAL;
6859 else if (decl_context == MEMFUNCDEF)
6860 funcdef_flag = true, decl_context = FIELD;
6861 else if (decl_context == BITFIELD)
6862 bitfield = 1, decl_context = FIELD;
6864 /* Look inside a declarator for the name being declared
6865 and get it as a string, for an error message. */
6866 for (id_declarator = declarator;
6868 id_declarator = id_declarator->declarator)
6870 if (id_declarator->kind != cdk_id)
6871 innermost_code = id_declarator->kind;
6873 switch (id_declarator->kind)
6876 if (id_declarator->declarator
6877 && id_declarator->declarator->kind == cdk_id)
6879 sfk = id_declarator->declarator->u.id.sfk;
6880 if (sfk == sfk_destructor)
6887 tree qualifying_scope = id_declarator->u.id.qualifying_scope;
6888 tree decl = id_declarator->u.id.unqualified_name;
6891 if (qualifying_scope)
6893 if (TYPE_P (qualifying_scope))
6895 ctype = qualifying_scope;
6896 if (innermost_code != cdk_function
6897 && current_class_type
6898 && !UNIQUELY_DERIVED_FROM_P (ctype,
6899 current_class_type))
6901 error ("type %qT is not derived from type %qT",
6902 ctype, current_class_type);
6903 return error_mark_node;
6906 else if (TREE_CODE (qualifying_scope) == NAMESPACE_DECL)
6907 in_namespace = qualifying_scope;
6909 switch (TREE_CODE (decl))
6915 if (innermost_code != cdk_function)
6917 error ("declaration of %qD as non-function", decl);
6918 return error_mark_node;
6920 else if (!qualifying_scope
6921 && !(current_class_type && at_class_scope_p ()))
6923 error ("declaration of %qD as non-member", decl);
6924 return error_mark_node;
6927 type = TREE_OPERAND (decl, 0);
6928 name = IDENTIFIER_POINTER (constructor_name (type));
6933 case TEMPLATE_ID_EXPR:
6935 tree fns = TREE_OPERAND (decl, 0);
6938 if (TREE_CODE (dname) == COMPONENT_REF)
6939 dname = TREE_OPERAND (dname, 1);
6940 if (TREE_CODE (dname) != IDENTIFIER_NODE)
6942 gcc_assert (is_overloaded_fn (dname));
6943 dname = DECL_NAME (get_first_fn (dname));
6948 case IDENTIFIER_NODE:
6949 if (TREE_CODE (decl) == IDENTIFIER_NODE)
6952 if (C_IS_RESERVED_WORD (dname))
6954 error ("declarator-id missing; using reserved word %qD",
6956 name = IDENTIFIER_POINTER (dname);
6958 else if (!IDENTIFIER_TYPENAME_P (dname))
6959 name = IDENTIFIER_POINTER (dname);
6962 gcc_assert (flags == NO_SPECIAL);
6963 flags = TYPENAME_FLAG;
6964 ctor_return_type = TREE_TYPE (dname);
6965 sfk = sfk_conversion;
6966 if (is_typename_at_global_scope (dname))
6967 name = IDENTIFIER_POINTER (dname);
6969 name = "<invalid operator>";
6985 return error_mark_node;
6991 if (id_declarator->kind == cdk_id)
6997 The declarator in a function-definition shall have the form
6998 D1 ( parameter-declaration-clause) ... */
6999 if (funcdef_flag && innermost_code != cdk_function)
7001 error ("function definition does not declare parameters");
7002 return error_mark_node;
7005 if (((dname && IDENTIFIER_OPNAME_P (dname)) || flags == TYPENAME_FLAG)
7006 && innermost_code != cdk_function
7007 && ! (ctype && !declspecs->any_specifiers_p))
7009 error ("declaration of %qD as non-function", dname);
7010 return error_mark_node;
7013 /* Anything declared one level down from the top level
7014 must be one of the parameters of a function
7015 (because the body is at least two levels down). */
7017 /* This heuristic cannot be applied to C++ nodes! Fixed, however,
7018 by not allowing C++ class definitions to specify their parameters
7019 with xdecls (must be spec.d in the parmlist).
7021 Since we now wait to push a class scope until we are sure that
7022 we are in a legitimate method context, we must set oldcname
7023 explicitly (since current_class_name is not yet alive).
7025 We also want to avoid calling this a PARM if it is in a namespace. */
7027 if (decl_context == NORMAL && !toplevel_bindings_p ())
7029 struct cp_binding_level *b = current_binding_level;
7030 current_binding_level = b->level_chain;
7031 if (current_binding_level != 0 && toplevel_bindings_p ())
7032 decl_context = PARM;
7033 current_binding_level = b;
7037 name = decl_context == PARM ? "parameter" : "type name";
7039 /* If there were multiple types specified in the decl-specifier-seq,
7040 issue an error message. */
7041 if (declspecs->multiple_types_p)
7042 error ("two or more data types in declaration of %qs", name);
7043 /* Extract the basic type from the decl-specifier-seq. */
7044 type = declspecs->type;
7045 if (type == error_mark_node)
7048 type_was_error_mark_node = true;
7050 /* If the entire declaration is itself tagged as deprecated then
7051 suppress reports of deprecated items. */
7052 if (type && TREE_DEPRECATED (type)
7053 && deprecated_state != DEPRECATED_SUPPRESS)
7054 warn_deprecated_use (type);
7055 if (type && TREE_CODE (type) == TYPE_DECL)
7057 typedef_decl = type;
7058 type = TREE_TYPE (typedef_decl);
7060 /* No type at all: default to `int', and set DEFAULTED_INT
7061 because it was not a user-defined typedef. */
7062 if (type == NULL_TREE && (signed_p || unsigned_p || long_p || short_p))
7064 /* These imply 'int'. */
7065 type = integer_type_node;
7069 explicit_int = declspecs->explicit_int_p;
7070 explicit_char = declspecs->explicit_char_p;
7073 /* See the code below that used this. */
7075 decl_attr = DECL_ATTRIBUTES (typedef_decl);
7077 typedef_type = type;
7080 if (sfk != sfk_conversion)
7081 ctor_return_type = ctype;
7083 if (sfk != sfk_none)
7084 type = check_special_function_return_type (sfk, type,
7086 else if (type == NULL_TREE)
7092 /* We handle `main' specially here, because 'main () { }' is so
7093 common. With no options, it is allowed. With -Wreturn-type,
7094 it is a warning. It is only an error with -pedantic-errors. */
7095 is_main = (funcdef_flag
7096 && dname && MAIN_NAME_P (dname)
7097 && ctype == NULL_TREE
7098 && in_namespace == NULL_TREE
7099 && current_namespace == global_namespace);
7101 if (type_was_error_mark_node)
7102 /* We've already issued an error, don't complain more. */;
7103 else if (in_system_header || flag_ms_extensions)
7104 /* Allow it, sigh. */;
7105 else if (pedantic || ! is_main)
7106 pedwarn ("ISO C++ forbids declaration of %qs with no type", name);
7107 else if (warn_return_type)
7108 warning (0, "ISO C++ forbids declaration of %qs with no type", name);
7110 type = integer_type_node;
7115 /* Now process the modifiers that were specified
7116 and check for invalid combinations. */
7118 /* Long double is a special combination. */
7119 if (long_p && !longlong && TYPE_MAIN_VARIANT (type) == double_type_node)
7122 type = build_qualified_type (long_double_type_node,
7123 cp_type_quals (type));
7126 /* Check all other uses of type modifiers. */
7128 if (unsigned_p || signed_p || long_p || short_p)
7132 if ((signed_p || unsigned_p) && TREE_CODE (type) != INTEGER_TYPE)
7133 error ("%<signed%> or %<unsigned%> invalid for %qs", name);
7134 else if (signed_p && unsigned_p)
7135 error ("%<signed%> and %<unsigned%> specified together for %qs", name);
7136 else if (longlong && TREE_CODE (type) != INTEGER_TYPE)
7137 error ("%<long long%> invalid for %qs", name);
7138 else if (long_p && TREE_CODE (type) == REAL_TYPE)
7139 error ("%<long%> invalid for %qs", name);
7140 else if (short_p && TREE_CODE (type) == REAL_TYPE)
7141 error ("%<short%> invalid for %qs", name);
7142 else if ((long_p || short_p) && explicit_char)
7143 error ("%<long%> or %<short%> specified with char for %qs", name);
7144 else if (long_p && short_p)
7145 error ("%<long%> and %<short%> specified together for %qs", name);
7149 if (!explicit_int && !defaulted_int && !explicit_char && pedantic)
7151 pedwarn ("long, short, signed or unsigned used invalidly for %qs",
7153 if (flag_pedantic_errors)
7158 /* Discard the type modifiers if they are invalid. */
7169 /* Decide whether an integer type is signed or not.
7170 Optionally treat bitfields as signed by default. */
7174 It is implementation-defined whether a plain (neither
7175 explicitly signed or unsigned) char, short, int, or long
7176 bit-field is signed or unsigned.
7178 Naturally, we extend this to long long as well. Note that
7179 this does not include wchar_t. */
7180 || (bitfield && !flag_signed_bitfields
7182 /* A typedef for plain `int' without `signed' can be
7183 controlled just like plain `int', but a typedef for
7184 `signed int' cannot be so controlled. */
7186 && C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl))
7187 && TREE_CODE (type) == INTEGER_TYPE
7188 && !same_type_p (TYPE_MAIN_VARIANT (type), wchar_type_node)))
7191 type = long_long_unsigned_type_node;
7193 type = long_unsigned_type_node;
7195 type = short_unsigned_type_node;
7196 else if (type == char_type_node)
7197 type = unsigned_char_type_node;
7198 else if (typedef_decl)
7199 type = c_common_unsigned_type (type);
7201 type = unsigned_type_node;
7203 else if (signed_p && type == char_type_node)
7204 type = signed_char_type_node;
7206 type = long_long_integer_type_node;
7208 type = long_integer_type_node;
7210 type = short_integer_type_node;
7212 if (declspecs->specs[(int)ds_complex])
7214 if (TREE_CODE (type) != INTEGER_TYPE && TREE_CODE (type) != REAL_TYPE)
7215 error ("complex invalid for %qs", name);
7216 /* If we just have "complex", it is equivalent to
7217 "complex double", but if any modifiers at all are specified it is
7218 the complex form of TYPE. E.g, "complex short" is
7219 "complex short int". */
7221 else if (defaulted_int && ! longlong
7222 && ! (long_p || short_p || signed_p || unsigned_p))
7223 type = complex_double_type_node;
7224 else if (type == integer_type_node)
7225 type = complex_integer_type_node;
7226 else if (type == float_type_node)
7227 type = complex_float_type_node;
7228 else if (type == double_type_node)
7229 type = complex_double_type_node;
7230 else if (type == long_double_type_node)
7231 type = complex_long_double_type_node;
7233 type = build_complex_type (type);
7236 type_quals = TYPE_UNQUALIFIED;
7237 if (declspecs->specs[(int)ds_const])
7238 type_quals |= TYPE_QUAL_CONST;
7239 if (declspecs->specs[(int)ds_volatile])
7240 type_quals |= TYPE_QUAL_VOLATILE;
7241 if (declspecs->specs[(int)ds_restrict])
7242 type_quals |= TYPE_QUAL_RESTRICT;
7243 if (sfk == sfk_conversion && type_quals != TYPE_UNQUALIFIED)
7244 error ("qualifiers are not allowed on declaration of %<operator %T%>",
7247 if (TREE_CODE (type) == FUNCTION_TYPE
7248 && type_quals != TYPE_UNQUALIFIED)
7250 /* This was an error in C++98 (cv-qualifiers cannot be added to
7251 a function type), but DR 295 makes the code well-formed by
7252 dropping the extra qualifiers. */
7255 tree bad_type = build_qualified_type (type, type_quals);
7256 pedwarn ("ignoring %qV qualifiers added to function type %qT",
7259 type_quals = TYPE_UNQUALIFIED;
7261 type_quals |= cp_type_quals (type);
7262 type = cp_build_qualified_type_real
7263 (type, type_quals, ((typedef_decl && !DECL_ARTIFICIAL (typedef_decl)
7264 ? tf_ignore_bad_quals : 0) | tf_warning_or_error));
7265 /* We might have ignored or rejected some of the qualifiers. */
7266 type_quals = cp_type_quals (type);
7269 inlinep = !! declspecs->specs[(int)ds_inline];
7270 virtualp = !! declspecs->specs[(int)ds_virtual];
7271 explicitp = !! declspecs->specs[(int)ds_explicit];
7273 storage_class = declspecs->storage_class;
7274 if (storage_class == sc_static)
7275 staticp = 1 + (decl_context == FIELD);
7277 if (virtualp && staticp == 2)
7279 error ("member %qD cannot be declared both virtual and static", dname);
7280 storage_class = sc_none;
7283 friendp = !! declspecs->specs[(int)ds_friend];
7285 if (dependent_name && !friendp)
7287 error ("%<%T::%D%> is not a valid declarator", ctype, dependent_name);
7288 return void_type_node;
7291 /* Issue errors about use of storage classes for parameters. */
7292 if (decl_context == PARM)
7294 if (declspecs->specs[(int)ds_typedef])
7295 error ("typedef declaration invalid in parameter declaration");
7296 else if (storage_class == sc_static
7297 || storage_class == sc_extern
7299 error ("storage class specifiers invalid in parameter declarations");
7302 /* Give error if `virtual' is used outside of class declaration. */
7304 && (current_class_name == NULL_TREE || decl_context != FIELD))
7306 error ("virtual outside class declaration");
7310 /* Static anonymous unions are dealt with here. */
7311 if (staticp && decl_context == TYPENAME
7313 && ANON_AGGR_TYPE_P (declspecs->type))
7314 decl_context = FIELD;
7316 /* Warn about storage classes that are invalid for certain
7317 kinds of declarations (parameters, typenames, etc.). */
7318 if (declspecs->multiple_storage_classes_p)
7320 error ("multiple storage classes in declaration of %qs", name);
7321 storage_class = sc_none;
7325 && storage_class != sc_extern
7326 && storage_class != sc_static)
7327 || declspecs->specs[(int)ds_typedef]))
7329 error ("multiple storage classes in declaration of %qs", name);
7332 else if (decl_context != NORMAL
7333 && ((storage_class != sc_none
7334 && storage_class != sc_mutable)
7337 if ((decl_context == PARM || decl_context == CATCHPARM)
7338 && (storage_class == sc_register
7339 || storage_class == sc_auto))
7341 else if (declspecs->specs[(int)ds_typedef])
7343 else if (decl_context == FIELD
7344 /* C++ allows static class elements. */
7345 && storage_class == sc_static)
7346 /* C++ also allows inlines and signed and unsigned elements,
7347 but in those cases we don't come in here. */
7351 if (decl_context == FIELD)
7352 error ("storage class specified for %qs", name);
7355 if (decl_context == PARM || decl_context == CATCHPARM)
7356 error ("storage class specified for parameter %qs", name);
7358 error ("storage class specified for typename");
7360 if (storage_class == sc_register
7361 || storage_class == sc_auto
7362 || storage_class == sc_extern
7364 storage_class = sc_none;
7367 else if (storage_class == sc_extern && initialized
7370 if (toplevel_bindings_p ())
7372 /* It's common practice (and completely valid) to have a const
7373 be initialized and declared extern. */
7374 if (!(type_quals & TYPE_QUAL_CONST))
7375 warning (0, "%qs initialized and declared %<extern%>", name);
7378 error ("%qs has both %<extern%> and initializer", name);
7380 else if (storage_class == sc_extern && funcdef_flag
7381 && ! toplevel_bindings_p ())
7382 error ("nested function %qs declared %<extern%>", name);
7383 else if (toplevel_bindings_p ())
7385 if (storage_class == sc_auto)
7386 error ("top-level declaration of %qs specifies %<auto%>", name);
7389 && storage_class != sc_extern
7390 && storage_class != sc_static)
7392 error ("function-scope %qs implicitly auto and declared %<__thread%>",
7397 if (storage_class && friendp)
7398 error ("storage class specifiers invalid in friend function declarations");
7401 unqualified_id = NULL_TREE;
7404 unqualified_id = id_declarator->u.id.unqualified_name;
7405 switch (TREE_CODE (unqualified_id))
7409 = constructor_name (TREE_OPERAND (unqualified_id, 0));
7412 case IDENTIFIER_NODE:
7413 case TEMPLATE_ID_EXPR:
7421 /* Determine the type of the entity declared by recurring on the
7423 for (; declarator; declarator = declarator->declarator)
7425 const cp_declarator *inner_declarator;
7428 if (type == error_mark_node)
7429 return error_mark_node;
7431 attrs = declarator->attributes;
7437 if (declarator == NULL || declarator->kind == cdk_id)
7438 attr_flags |= (int) ATTR_FLAG_DECL_NEXT;
7439 if (declarator->kind == cdk_function)
7440 attr_flags |= (int) ATTR_FLAG_FUNCTION_NEXT;
7441 if (declarator->kind == cdk_array)
7442 attr_flags |= (int) ATTR_FLAG_ARRAY_NEXT;
7443 returned_attrs = decl_attributes (&type,
7444 chainon (returned_attrs, attrs),
7448 if (declarator->kind == cdk_id)
7451 inner_declarator = declarator->declarator;
7453 switch (declarator->kind)
7456 type = create_array_type_for_decl (dname, type,
7457 declarator->u.array.bounds);
7465 /* Declaring a function type.
7466 Make sure we have a valid type for the function to return. */
7468 /* We now know that the TYPE_QUALS don't apply to the
7469 decl, but to its return type. */
7470 type_quals = TYPE_UNQUALIFIED;
7472 /* Warn about some types functions can't return. */
7474 if (TREE_CODE (type) == FUNCTION_TYPE)
7476 error ("%qs declared as function returning a function", name);
7477 type = integer_type_node;
7479 if (TREE_CODE (type) == ARRAY_TYPE)
7481 error ("%qs declared as function returning an array", name);
7482 type = integer_type_node;
7485 /* Pick up type qualifiers which should be applied to `this'. */
7486 memfn_quals = declarator->u.function.qualifiers;
7488 /* Pick up the exception specifications. */
7489 raises = declarator->u.function.exception_specification;
7491 /* Say it's a definition only for the CALL_EXPR
7492 closest to the identifier. */
7493 funcdecl_p = inner_declarator && inner_declarator->kind == cdk_id;
7495 if (ctype == NULL_TREE
7496 && decl_context == FIELD
7498 && (friendp == 0 || dname == current_class_name))
7499 ctype = current_class_type;
7501 if (ctype && (sfk == sfk_constructor
7502 || sfk == sfk_destructor))
7504 /* We are within a class's scope. If our declarator name
7505 is the same as the class name, and we are defining
7506 a function, then it is a constructor/destructor, and
7507 therefore returns a void type. */
7509 /* ISO C++ 12.4/2. A destructor may not be declared
7510 const or volatile. A destructor may not be
7513 ISO C++ 12.1. A constructor may not be declared
7514 const or volatile. A constructor may not be
7515 virtual. A constructor may not be static. */
7517 error ((flags == DTOR_FLAG)
7518 ? "destructor cannot be static member function"
7519 : "constructor cannot be static member function");
7522 error ((flags == DTOR_FLAG)
7523 ? "destructors may not be cv-qualified"
7524 : "constructors may not be cv-qualified");
7525 memfn_quals = TYPE_UNQUALIFIED;
7528 if (decl_context == FIELD
7529 && !member_function_or_else (ctype,
7532 return void_type_node;
7534 if (flags != DTOR_FLAG)
7536 /* It's a constructor. */
7541 pedwarn ("constructors cannot be declared virtual");
7544 if (decl_context == FIELD
7545 && sfk != sfk_constructor)
7548 if (decl_context == FIELD)
7554 error ("can't initialize friend function %qs", name);
7557 /* Cannot be both friend and virtual. */
7558 error ("virtual functions cannot be friends");
7561 if (decl_context == NORMAL)
7562 error ("friend declaration not in class definition");
7563 if (current_function_decl && funcdef_flag)
7564 error ("can't define friend function %qs in a local "
7569 arg_types = grokparms (declarator->u.function.parameters,
7572 if (inner_declarator
7573 && inner_declarator->kind == cdk_id
7574 && inner_declarator->u.id.sfk == sfk_destructor
7575 && arg_types != void_list_node)
7577 error ("destructors may not have parameters");
7578 arg_types = void_list_node;
7582 type = build_function_type (type, arg_types);
7589 /* Filter out pointers-to-references and references-to-references.
7590 We can get these if a TYPE_DECL is used. */
7592 if (TREE_CODE (type) == REFERENCE_TYPE)
7594 error (declarator->kind == cdk_reference
7595 ? "cannot declare reference to %q#T"
7596 : "cannot declare pointer to %q#T", type);
7597 type = TREE_TYPE (type);
7599 else if (VOID_TYPE_P (type))
7601 if (declarator->kind == cdk_reference)
7602 error ("cannot declare reference to %q#T", type);
7603 else if (declarator->kind == cdk_ptrmem)
7604 error ("cannot declare pointer to %q#T member", type);
7607 /* We now know that the TYPE_QUALS don't apply to the decl,
7608 but to the target of the pointer. */
7609 type_quals = TYPE_UNQUALIFIED;
7611 if (declarator->kind == cdk_ptrmem
7612 && (TREE_CODE (type) == FUNCTION_TYPE || memfn_quals))
7614 memfn_quals |= cp_type_quals (type);
7615 type = build_memfn_type (type,
7616 declarator->u.pointer.class_type,
7618 memfn_quals = TYPE_UNQUALIFIED;
7621 if (declarator->kind == cdk_reference)
7623 if (!VOID_TYPE_P (type))
7624 type = build_reference_type (type);
7626 else if (TREE_CODE (type) == METHOD_TYPE)
7627 type = build_ptrmemfunc_type (build_pointer_type (type));
7628 else if (declarator->kind == cdk_ptrmem)
7630 gcc_assert (TREE_CODE (declarator->u.pointer.class_type)
7632 if (declarator->u.pointer.class_type == error_mark_node)
7633 /* We will already have complained. */
7634 type = error_mark_node;
7636 type = build_ptrmem_type (declarator->u.pointer.class_type,
7640 type = build_pointer_type (type);
7642 /* Process a list of type modifier keywords (such as
7643 const or volatile) that were given inside the `*' or `&'. */
7645 if (declarator->u.pointer.qualifiers)
7648 = cp_build_qualified_type (type,
7649 declarator->u.pointer.qualifiers);
7650 type_quals = cp_type_quals (type);
7663 if (unqualified_id && TREE_CODE (unqualified_id) == TEMPLATE_ID_EXPR
7664 && TREE_CODE (type) != FUNCTION_TYPE
7665 && TREE_CODE (type) != METHOD_TYPE)
7667 error ("template-id %qD used as a declarator",
7669 unqualified_id = dname;
7672 /* If TYPE is a FUNCTION_TYPE, but the function name was explicitly
7673 qualified with a class-name, turn it into a METHOD_TYPE, unless
7674 we know that the function is static. We take advantage of this
7675 opportunity to do other processing that pertains to entities
7676 explicitly declared to be class members. Note that if DECLARATOR
7677 is non-NULL, we know it is a cdk_id declarator; otherwise, we
7678 would not have exited the loop above. */
7680 && declarator->u.id.qualifying_scope
7681 && TYPE_P (declarator->u.id.qualifying_scope))
7685 ctype = declarator->u.id.qualifying_scope;
7686 ctype = TYPE_MAIN_VARIANT (ctype);
7688 while (t != NULL_TREE && CLASS_TYPE_P (t))
7690 /* You're supposed to have one `template <...>' for every
7691 template class, but you don't need one for a full
7692 specialization. For example:
7694 template <class T> struct S{};
7695 template <> struct S<int> { void f(); };
7696 void S<int>::f () {}
7698 is correct; there shouldn't be a `template <>' for the
7699 definition of `S<int>::f'. */
7700 if (CLASSTYPE_TEMPLATE_SPECIALIZATION (t)
7701 && !any_dependent_template_arguments_p (CLASSTYPE_TI_ARGS (t)))
7702 /* T is an explicit (not partial) specialization. All
7703 containing classes must therefore also be explicitly
7706 if ((CLASSTYPE_USE_TEMPLATE (t) || CLASSTYPE_IS_TEMPLATE (t))
7707 && PRIMARY_TEMPLATE_P (CLASSTYPE_TI_TEMPLATE (t)))
7708 template_count += 1;
7710 t = TYPE_MAIN_DECL (t);
7711 t = DECL_CONTEXT (t);
7714 if (ctype == current_class_type)
7717 pedwarn ("member functions are implicitly friends of their class");
7719 pedwarn ("extra qualification %<%T::%> on member %qs",
7722 else if (/* If the qualifying type is already complete, then we
7723 can skip the following checks. */
7724 !COMPLETE_TYPE_P (ctype)
7725 && (/* If the function is being defined, then
7726 qualifying type must certainly be complete. */
7728 /* A friend declaration of "T::f" is OK, even if
7729 "T" is a template parameter. But, if this
7730 function is not a friend, the qualifying type
7732 || (!friendp && !CLASS_TYPE_P (ctype))
7733 /* For a declaration, the type need not be
7734 complete, if either it is dependent (since there
7735 is no meaningful definition of complete in that
7736 case) or the qualifying class is currently being
7738 || !(dependent_type_p (ctype)
7739 || currently_open_class (ctype)))
7740 /* Check that the qualifying type is complete. */
7741 && !complete_type_or_else (ctype, NULL_TREE))
7742 return error_mark_node;
7743 else if (TREE_CODE (type) == FUNCTION_TYPE)
7745 tree sname = declarator->u.id.unqualified_name;
7747 if (current_class_type
7748 && (!friendp || funcdef_flag))
7751 ? "cannot define member function %<%T::%s%> within %<%T%>"
7752 : "cannot declare member function %<%T::%s%> within %<%T%>",
7753 ctype, name, current_class_type);
7754 return error_mark_node;
7757 if (TREE_CODE (sname) == IDENTIFIER_NODE
7758 && NEW_DELETE_OPNAME_P (sname))
7759 /* Overloaded operator new and operator delete
7760 are always static functions. */
7763 type = build_memfn_type (type, ctype, memfn_quals);
7765 else if (declspecs->specs[(int)ds_typedef]
7766 && current_class_type)
7768 error ("cannot declare member %<%T::%s%> within %qT",
7769 ctype, name, current_class_type);
7770 return error_mark_node;
7774 /* Now TYPE has the actual type. */
7779 *attrlist = chainon (returned_attrs, *attrlist);
7781 attrlist = &returned_attrs;
7784 /* Did array size calculations overflow? */
7786 if (TREE_CODE (type) == ARRAY_TYPE
7787 && COMPLETE_TYPE_P (type)
7788 && TREE_CODE (TYPE_SIZE_UNIT (type)) == INTEGER_CST
7789 && TREE_OVERFLOW (TYPE_SIZE_UNIT (type)))
7791 error ("size of array %qs is too large", name);
7792 /* If we proceed with the array type as it is, we'll eventually
7793 crash in tree_low_cst(). */
7794 type = error_mark_node;
7797 if ((decl_context == FIELD || decl_context == PARM)
7798 && !processing_template_decl
7799 && variably_modified_type_p (type, NULL_TREE))
7801 if (decl_context == FIELD)
7802 error ("data member may not have variably modified type %qT", type);
7804 error ("parameter may not have variably modified type %qT", type);
7805 type = error_mark_node;
7808 if (explicitp == 1 || (explicitp && friendp))
7810 /* [dcl.fct.spec] The explicit specifier shall only be used in
7811 declarations of constructors within a class definition. */
7812 error ("only declarations of constructors can be %<explicit%>");
7816 if (storage_class == sc_mutable)
7818 if (decl_context != FIELD || friendp)
7820 error ("non-member %qs cannot be declared %<mutable%>", name);
7821 storage_class = sc_none;
7823 else if (decl_context == TYPENAME || declspecs->specs[(int)ds_typedef])
7825 error ("non-object member %qs cannot be declared %<mutable%>", name);
7826 storage_class = sc_none;
7828 else if (TREE_CODE (type) == FUNCTION_TYPE
7829 || TREE_CODE (type) == METHOD_TYPE)
7831 error ("function %qs cannot be declared %<mutable%>", name);
7832 storage_class = sc_none;
7836 error ("static %qs cannot be declared %<mutable%>", name);
7837 storage_class = sc_none;
7839 else if (type_quals & TYPE_QUAL_CONST)
7841 error ("const %qs cannot be declared %<mutable%>", name);
7842 storage_class = sc_none;
7846 /* If this is declaring a typedef name, return a TYPE_DECL. */
7847 if (declspecs->specs[(int)ds_typedef] && decl_context != TYPENAME)
7851 /* Note that the grammar rejects storage classes
7852 in typenames, fields or parameters. */
7853 if (current_lang_name == lang_name_java)
7854 TYPE_FOR_JAVA (type) = 1;
7856 /* This declaration:
7858 typedef void f(int) const;
7860 declares a function type which is not a member of any
7861 particular class, but which is cv-qualified; for
7862 example "f S::*" declares a pointer to a const-qualified
7863 member function of S. We record the cv-qualification in the
7865 if (memfn_quals && TREE_CODE (type) == FUNCTION_TYPE)
7866 type = cp_build_qualified_type (type, memfn_quals);
7868 if (decl_context == FIELD)
7869 decl = build_lang_decl (TYPE_DECL, unqualified_id, type);
7871 decl = build_decl (TYPE_DECL, unqualified_id, type);
7872 if (id_declarator && declarator->u.id.qualifying_scope)
7873 error ("%Jtypedef name may not be a nested-name-specifier", decl);
7875 if (decl_context != FIELD)
7877 if (!current_function_decl)
7878 DECL_CONTEXT (decl) = FROB_CONTEXT (current_namespace);
7879 else if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (current_function_decl)
7880 || (DECL_MAYBE_IN_CHARGE_DESTRUCTOR_P
7881 (current_function_decl)))
7882 /* The TYPE_DECL is "abstract" because there will be
7883 clones of this constructor/destructor, and there will
7884 be copies of this TYPE_DECL generated in those
7886 DECL_ABSTRACT (decl) = 1;
7888 else if (constructor_name_p (unqualified_id, current_class_type))
7889 pedwarn ("ISO C++ forbids nested type %qD with same name "
7890 "as enclosing class",
7893 /* If the user declares "typedef struct {...} foo" then the
7894 struct will have an anonymous name. Fill that name in now.
7895 Nothing can refer to it, so nothing needs know about the name
7897 if (type != error_mark_node
7900 && TREE_CODE (TYPE_NAME (type)) == TYPE_DECL
7901 && TYPE_ANONYMOUS_P (type)
7902 /* Don't do this if there are attributes. */
7903 && (!attrlist || !*attrlist)
7904 && cp_type_quals (type) == TYPE_UNQUALIFIED)
7906 tree oldname = TYPE_NAME (type);
7909 /* Replace the anonymous name with the real name everywhere. */
7910 for (t = TYPE_MAIN_VARIANT (type); t; t = TYPE_NEXT_VARIANT (t))
7911 if (TYPE_NAME (t) == oldname)
7912 TYPE_NAME (t) = decl;
7914 if (TYPE_LANG_SPECIFIC (type))
7915 TYPE_WAS_ANONYMOUS (type) = 1;
7917 /* If this is a typedef within a template class, the nested
7918 type is a (non-primary) template. The name for the
7919 template needs updating as well. */
7920 if (TYPE_LANG_SPECIFIC (type) && CLASSTYPE_TEMPLATE_INFO (type))
7921 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type))
7922 = TYPE_IDENTIFIER (type);
7924 /* FIXME remangle member functions; member functions of a
7925 type with external linkage have external linkage. */
7928 /* Any qualifiers on a function type typedef have already been
7930 if (memfn_quals && !ctype && TREE_CODE (type) == FUNCTION_TYPE)
7931 memfn_quals = TYPE_UNQUALIFIED;
7934 || (typedef_decl && C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl)))
7935 C_TYPEDEF_EXPLICITLY_SIGNED (decl) = 1;
7937 bad_specifiers (decl, "type", virtualp,
7938 memfn_quals != TYPE_UNQUALIFIED,
7939 inlinep, friendp, raises != NULL_TREE);
7944 /* Detect the case of an array type of unspecified size
7945 which came, as such, direct from a typedef name.
7946 We must copy the type, so that the array's domain can be
7947 individually set by the object's initializer. */
7949 if (type && typedef_type
7950 && TREE_CODE (type) == ARRAY_TYPE && !TYPE_DOMAIN (type)
7951 && TYPE_MAIN_VARIANT (type) == TYPE_MAIN_VARIANT (typedef_type))
7952 type = build_cplus_array_type (TREE_TYPE (type), NULL_TREE);
7954 /* Detect where we're using a typedef of function type to declare a
7955 function. PARMS will not be set, so we must create it now. */
7957 if (type == typedef_type && TREE_CODE (type) == FUNCTION_TYPE)
7959 tree decls = NULL_TREE;
7962 for (args = TYPE_ARG_TYPES (type); args; args = TREE_CHAIN (args))
7964 tree decl = cp_build_parm_decl (NULL_TREE, TREE_VALUE (args));
7966 TREE_CHAIN (decl) = decls;
7970 parms = nreverse (decls);
7972 if (decl_context != TYPENAME)
7974 /* A cv-qualifier-seq shall only be part of the function type
7975 for a non-static member function. [8.3.5/4 dcl.fct] */
7976 if (cp_type_quals (type) != TYPE_UNQUALIFIED
7977 && (current_class_type == NULL_TREE || staticp) )
7979 error ("qualified function types cannot be used to declare %s functions",
7980 (staticp? "static member" : "free"));
7981 type = TYPE_MAIN_VARIANT (type);
7984 /* The qualifiers on the function type become the qualifiers on
7985 the non-static member function. */
7986 memfn_quals |= cp_type_quals (type);
7990 /* If this is a type name (such as, in a cast or sizeof),
7991 compute the type and return it now. */
7993 if (decl_context == TYPENAME)
7995 /* Note that the grammar rejects storage classes
7996 in typenames, fields or parameters. */
7997 if (type_quals != TYPE_UNQUALIFIED)
7998 type_quals = TYPE_UNQUALIFIED;
8000 /* Special case: "friend class foo" looks like a TYPENAME context. */
8003 if (type_quals != TYPE_UNQUALIFIED)
8005 error ("type qualifiers specified for friend class declaration");
8006 type_quals = TYPE_UNQUALIFIED;
8010 error ("%<inline%> specified for friend class declaration");
8016 /* Don't allow friend declaration without a class-key. */
8017 if (TREE_CODE (type) == TEMPLATE_TYPE_PARM)
8018 pedwarn ("template parameters cannot be friends");
8019 else if (TREE_CODE (type) == TYPENAME_TYPE)
8020 pedwarn ("friend declaration requires class-key, "
8021 "i.e. %<friend class %T::%D%>",
8022 TYPE_CONTEXT (type), TYPENAME_TYPE_FULLNAME (type));
8024 pedwarn ("friend declaration requires class-key, "
8025 "i.e. %<friend %#T%>",
8029 /* Only try to do this stuff if we didn't already give up. */
8030 if (type != integer_type_node)
8032 /* A friendly class? */
8033 if (current_class_type)
8034 make_friend_class (current_class_type, TYPE_MAIN_VARIANT (type),
8037 error ("trying to make class %qT a friend of global scope",
8040 type = void_type_node;
8043 else if (memfn_quals)
8045 if (ctype == NULL_TREE)
8047 if (TREE_CODE (type) != METHOD_TYPE)
8048 error ("invalid qualifiers on non-member function type");
8050 ctype = TYPE_METHOD_BASETYPE (type);
8053 type = build_memfn_type (type, ctype, memfn_quals);
8058 else if (unqualified_id == NULL_TREE && decl_context != PARM
8059 && decl_context != CATCHPARM
8060 && TREE_CODE (type) != UNION_TYPE
8063 error ("abstract declarator %qT used as declaration", type);
8064 return error_mark_node;
8067 /* Only functions may be declared using an operator-function-id. */
8069 && IDENTIFIER_OPNAME_P (unqualified_id)
8070 && TREE_CODE (type) != FUNCTION_TYPE
8071 && TREE_CODE (type) != METHOD_TYPE)
8073 error ("declaration of %qD as non-function", unqualified_id);
8074 return error_mark_node;
8077 /* We don't check parameter types here because we can emit a better
8078 error message later. */
8079 if (decl_context != PARM)
8080 type = check_var_type (unqualified_id, type);
8082 /* Now create the decl, which may be a VAR_DECL, a PARM_DECL
8083 or a FUNCTION_DECL, depending on DECL_CONTEXT and TYPE. */
8085 if (decl_context == PARM || decl_context == CATCHPARM)
8087 if (ctype || in_namespace)
8088 error ("cannot use %<::%> in parameter declaration");
8090 /* A parameter declared as an array of T is really a pointer to T.
8091 One declared as a function is really a pointer to a function.
8092 One declared as a member is really a pointer to member. */
8094 if (TREE_CODE (type) == ARRAY_TYPE)
8096 /* Transfer const-ness of array into that of type pointed to. */
8097 type = build_pointer_type (TREE_TYPE (type));
8098 type_quals = TYPE_UNQUALIFIED;
8100 else if (TREE_CODE (type) == FUNCTION_TYPE)
8101 type = build_pointer_type (type);
8107 if (decl_context == PARM)
8109 decl = cp_build_parm_decl (unqualified_id, type);
8111 bad_specifiers (decl, "parameter", virtualp,
8112 memfn_quals != TYPE_UNQUALIFIED,
8113 inlinep, friendp, raises != NULL_TREE);
8115 else if (decl_context == FIELD)
8117 /* The C99 flexible array extension. */
8118 if (!staticp && TREE_CODE (type) == ARRAY_TYPE
8119 && TYPE_DOMAIN (type) == NULL_TREE)
8121 tree itype = compute_array_index_type (dname, integer_zero_node);
8122 type = build_cplus_array_type (TREE_TYPE (type), itype);
8125 if (type == error_mark_node)
8127 /* Happens when declaring arrays of sizes which
8128 are error_mark_node, for example. */
8131 else if (in_namespace && !friendp)
8133 /* Something like struct S { int N::j; }; */
8134 error ("invalid use of %<::%>");
8137 else if (TREE_CODE (type) == FUNCTION_TYPE)
8140 tree function_context;
8144 if (ctype == NULL_TREE)
8145 ctype = current_class_type;
8147 if (ctype == NULL_TREE)
8149 error ("can't make %qD into a method -- not in a class",
8151 return void_type_node;
8154 /* ``A union may [ ... ] not [ have ] virtual functions.''
8156 if (virtualp && TREE_CODE (ctype) == UNION_TYPE)
8158 error ("function %qD declared virtual inside a union",
8160 return void_type_node;
8163 if (NEW_DELETE_OPNAME_P (unqualified_id))
8167 error ("%qD cannot be declared virtual, since it "
8173 else if (staticp < 2)
8174 type = build_memfn_type (type, ctype, memfn_quals);
8177 /* Check that the name used for a destructor makes sense. */
8178 if (sfk == sfk_destructor)
8182 gcc_assert (friendp);
8183 error ("expected qualified name in friend declaration "
8184 "for destructor %qD",
8185 id_declarator->u.id.unqualified_name);
8186 return error_mark_node;
8189 if (!same_type_p (TREE_OPERAND
8190 (id_declarator->u.id.unqualified_name, 0),
8193 error ("declaration of %qD as member of %qT",
8194 id_declarator->u.id.unqualified_name, ctype);
8195 return error_mark_node;
8199 /* Tell grokfndecl if it needs to set TREE_PUBLIC on the node. */
8200 function_context = (ctype != NULL_TREE) ?
8201 decl_function_context (TYPE_MAIN_DECL (ctype)) : NULL_TREE;
8202 publicp = (! friendp || ! staticp)
8203 && function_context == NULL_TREE;
8204 decl = grokfndecl (ctype, type,
8205 TREE_CODE (unqualified_id) != TEMPLATE_ID_EXPR
8206 ? unqualified_id : dname,
8209 virtualp, flags, memfn_quals, raises,
8210 friendp ? -1 : 0, friendp, publicp, inlinep,
8212 funcdef_flag, template_count, in_namespace, attrlist);
8213 if (decl == NULL_TREE)
8216 /* This clobbers the attrs stored in `decl' from `attrlist'. */
8217 /* The decl and setting of decl_attr is also turned off. */
8218 decl = build_decl_attribute_variant (decl, decl_attr);
8221 /* [class.conv.ctor]
8223 A constructor declared without the function-specifier
8224 explicit that can be called with a single parameter
8225 specifies a conversion from the type of its first
8226 parameter to the type of its class. Such a constructor
8227 is called a converting constructor. */
8229 DECL_NONCONVERTING_P (decl) = 1;
8230 else if (DECL_CONSTRUCTOR_P (decl))
8232 /* The constructor can be called with exactly one
8233 parameter if there is at least one parameter, and
8234 any subsequent parameters have default arguments.
8235 Ignore any compiler-added parms. */
8236 tree arg_types = FUNCTION_FIRST_USER_PARMTYPE (decl);
8238 if (arg_types == void_list_node
8240 && TREE_CHAIN (arg_types)
8241 && TREE_CHAIN (arg_types) != void_list_node
8242 && !TREE_PURPOSE (TREE_CHAIN (arg_types))))
8243 DECL_NONCONVERTING_P (decl) = 1;
8246 else if (TREE_CODE (type) == METHOD_TYPE)
8248 /* We only get here for friend declarations of
8249 members of other classes. */
8250 /* All method decls are public, so tell grokfndecl to set
8251 TREE_PUBLIC, also. */
8252 decl = grokfndecl (ctype, type,
8253 TREE_CODE (unqualified_id) != TEMPLATE_ID_EXPR
8254 ? unqualified_id : dname,
8257 virtualp, flags, memfn_quals, raises,
8258 friendp ? -1 : 0, friendp, 1, 0, sfk,
8259 funcdef_flag, template_count, in_namespace,
8261 if (decl == NULL_TREE)
8264 else if (!staticp && !dependent_type_p (type)
8265 && !COMPLETE_TYPE_P (complete_type (type))
8266 && (TREE_CODE (type) != ARRAY_TYPE || initialized == 0))
8269 error ("field %qD has incomplete type", unqualified_id);
8271 error ("name %qT has incomplete type", type);
8273 /* If we're instantiating a template, tell them which
8274 instantiation made the field's type be incomplete. */
8275 if (current_class_type
8276 && TYPE_NAME (current_class_type)
8277 && IDENTIFIER_TEMPLATE (TYPE_IDENTIFIER (current_class_type))
8279 && declspecs->type == type)
8280 error (" in instantiation of template %qT",
8281 current_class_type);
8283 type = error_mark_node;
8290 error ("%qE is neither function nor member function; "
8291 "cannot be declared friend", unqualified_id);
8299 /* Friends are treated specially. */
8300 if (ctype == current_class_type)
8301 ; /* We already issued a pedwarn. */
8302 else if (decl && DECL_NAME (decl))
8304 if (template_class_depth (current_class_type) == 0)
8306 decl = check_explicit_specialization
8307 (unqualified_id, decl, template_count,
8308 2 * funcdef_flag + 4);
8309 if (decl == error_mark_node)
8310 return error_mark_node;
8313 decl = do_friend (ctype, unqualified_id, decl,
8319 return void_type_node;
8322 /* Structure field. It may not be a function, except for C++. */
8324 if (decl == NULL_TREE)
8330 /* An attempt is being made to initialize a non-static
8331 member. But, from [class.mem]:
8333 4 A member-declarator can contain a
8334 constant-initializer only if it declares a static
8335 member (_class.static_) of integral or enumeration
8336 type, see _class.static.data_.
8338 This used to be relatively common practice, but
8339 the rest of the compiler does not correctly
8340 handle the initialization unless the member is
8341 static so we make it static below. */
8342 pedwarn ("ISO C++ forbids initialization of member %qD",
8344 pedwarn ("making %qD static", unqualified_id);
8348 if (uses_template_parms (type))
8349 /* We'll check at instantiation time. */
8351 else if (check_static_variable_definition (unqualified_id,
8353 /* If we just return the declaration, crashes
8354 will sometimes occur. We therefore return
8355 void_type_node, as if this was a friend
8356 declaration, to cause callers to completely
8357 ignore this declaration. */
8358 return void_type_node;
8363 /* C++ allows static class members. All other work
8364 for this is done by grokfield. */
8365 decl = build_lang_decl (VAR_DECL, unqualified_id, type);
8366 set_linkage_for_static_data_member (decl);
8367 /* Even if there is an in-class initialization, DECL
8368 is considered undefined until an out-of-class
8369 definition is provided. */
8370 DECL_EXTERNAL (decl) = 1;
8374 if (targetm.have_tls)
8375 DECL_TLS_MODEL (decl) = decl_default_tls_model (decl);
8377 /* A mere warning is sure to result in improper
8378 semantics at runtime. Don't bother to allow this to
8380 error ("thread-local storage not supported for this target");
8385 decl = build_decl (FIELD_DECL, unqualified_id, type);
8386 DECL_NONADDRESSABLE_P (decl) = bitfield;
8387 if (storage_class == sc_mutable)
8389 DECL_MUTABLE_P (decl) = 1;
8390 storage_class = sc_none;
8394 bad_specifiers (decl, "field", virtualp,
8395 memfn_quals != TYPE_UNQUALIFIED,
8396 inlinep, friendp, raises != NULL_TREE);
8399 else if (TREE_CODE (type) == FUNCTION_TYPE
8400 || TREE_CODE (type) == METHOD_TYPE)
8405 if (!unqualified_id)
8408 if (TREE_CODE (unqualified_id) == TEMPLATE_ID_EXPR)
8409 original_name = dname;
8411 original_name = unqualified_id;
8413 if (storage_class == sc_auto)
8414 error ("storage class %<auto%> invalid for function %qs", name);
8415 else if (storage_class == sc_register)
8416 error ("storage class %<register%> invalid for function %qs", name);
8418 error ("storage class %<__thread%> invalid for function %qs", name);
8420 /* Function declaration not at top level.
8421 Storage classes other than `extern' are not allowed
8422 and `extern' makes no difference. */
8423 if (! toplevel_bindings_p ()
8424 && (storage_class == sc_static
8425 || declspecs->specs[(int)ds_inline])
8428 if (storage_class == sc_static)
8429 pedwarn ("%<static%> specified invalid for function %qs "
8430 "declared out of global scope", name);
8432 pedwarn ("%<inline%> specifier invalid for function %qs "
8433 "declared out of global scope", name);
8436 if (ctype == NULL_TREE)
8440 error ("virtual non-class function %qs", name);
8444 else if (TREE_CODE (type) == FUNCTION_TYPE && staticp < 2
8445 && !NEW_DELETE_OPNAME_P (original_name))
8446 type = build_method_type_directly (ctype,
8448 TYPE_ARG_TYPES (type));
8450 /* Record presence of `static'. */
8451 publicp = (ctype != NULL_TREE
8452 || storage_class == sc_extern
8453 || storage_class != sc_static);
8455 decl = grokfndecl (ctype, type, original_name, parms, unqualified_id,
8456 virtualp, flags, memfn_quals, raises,
8458 publicp, inlinep, sfk, funcdef_flag,
8459 template_count, in_namespace, attrlist);
8460 if (decl == NULL_TREE)
8465 int invalid_static = 0;
8467 /* Don't allow a static member function in a class, and forbid
8468 declaring main to be static. */
8469 if (TREE_CODE (type) == METHOD_TYPE)
8471 pedwarn ("cannot declare member function %qD to have "
8472 "static linkage", decl);
8475 else if (current_function_decl)
8477 /* FIXME need arm citation */
8478 error ("cannot declare static function inside another function");
8485 storage_class = sc_none;
8491 /* It's a variable. */
8493 /* An uninitialized decl with `extern' is a reference. */
8494 decl = grokvardecl (type, unqualified_id,
8497 (type_quals & TYPE_QUAL_CONST) != 0,
8498 ctype ? ctype : in_namespace);
8499 bad_specifiers (decl, "variable", virtualp,
8500 memfn_quals != TYPE_UNQUALIFIED,
8501 inlinep, friendp, raises != NULL_TREE);
8505 DECL_CONTEXT (decl) = ctype;
8508 pedwarn ("%<static%> may not be used when defining "
8509 "(as opposed to declaring) a static data member");
8511 storage_class = sc_none;
8513 if (storage_class == sc_register && TREE_STATIC (decl))
8515 error ("static member %qD declared %<register%>", decl);
8516 storage_class = sc_none;
8518 if (storage_class == sc_extern && pedantic)
8520 pedwarn ("cannot explicitly declare member %q#D to have "
8523 storage_class = sc_none;
8528 /* Record `register' declaration for warnings on &
8529 and in case doing stupid register allocation. */
8531 if (storage_class == sc_register)
8532 DECL_REGISTER (decl) = 1;
8533 else if (storage_class == sc_extern)
8534 DECL_THIS_EXTERN (decl) = 1;
8535 else if (storage_class == sc_static)
8536 DECL_THIS_STATIC (decl) = 1;
8538 /* Record constancy and volatility. There's no need to do this
8539 when processing a template; we'll do this for the instantiated
8540 declaration based on the type of DECL. */
8541 if (!processing_template_decl)
8542 cp_apply_type_quals_to_decl (type_quals, decl);
8548 /* Subroutine of start_function. Ensure that each of the parameter
8549 types (as listed in PARMS) is complete, as is required for a
8550 function definition. */
8553 require_complete_types_for_parms (tree parms)
8555 for (; parms; parms = TREE_CHAIN (parms))
8557 if (dependent_type_p (TREE_TYPE (parms)))
8559 if (!VOID_TYPE_P (TREE_TYPE (parms))
8560 && complete_type_or_else (TREE_TYPE (parms), parms))
8562 relayout_decl (parms);
8563 DECL_ARG_TYPE (parms) = type_passed_as (TREE_TYPE (parms));
8566 /* grokparms or complete_type_or_else will have already issued
8568 TREE_TYPE (parms) = error_mark_node;
8572 /* Returns nonzero if T is a local variable. */
8575 local_variable_p (tree t)
8577 if ((TREE_CODE (t) == VAR_DECL
8578 /* A VAR_DECL with a context that is a _TYPE is a static data
8580 && !TYPE_P (CP_DECL_CONTEXT (t))
8581 /* Any other non-local variable must be at namespace scope. */
8582 && !DECL_NAMESPACE_SCOPE_P (t))
8583 || (TREE_CODE (t) == PARM_DECL))
8589 /* Returns nonzero if T is an automatic local variable or a label.
8590 (These are the declarations that need to be remapped when the code
8591 containing them is duplicated.) */
8594 nonstatic_local_decl_p (tree t)
8596 return ((local_variable_p (t) && !TREE_STATIC (t))
8597 || TREE_CODE (t) == LABEL_DECL
8598 || TREE_CODE (t) == RESULT_DECL);
8601 /* Like local_variable_p, but suitable for use as a tree-walking
8605 local_variable_p_walkfn (tree *tp, int *walk_subtrees,
8606 void *data ATTRIBUTE_UNUSED)
8608 if (local_variable_p (*tp) && !DECL_ARTIFICIAL (*tp))
8610 else if (TYPE_P (*tp))
8617 /* Check that ARG, which is a default-argument expression for a
8618 parameter DECL, is valid. Returns ARG, or ERROR_MARK_NODE, if
8619 something goes wrong. DECL may also be a _TYPE node, rather than a
8620 DECL, if there is no DECL available. */
8623 check_default_argument (tree decl, tree arg)
8628 if (TREE_CODE (arg) == DEFAULT_ARG)
8629 /* We get a DEFAULT_ARG when looking at an in-class declaration
8630 with a default argument. Ignore the argument for now; we'll
8631 deal with it after the class is complete. */
8640 decl_type = TREE_TYPE (decl);
8642 if (arg == error_mark_node
8643 || decl == error_mark_node
8644 || TREE_TYPE (arg) == error_mark_node
8645 || decl_type == error_mark_node)
8646 /* Something already went wrong. There's no need to check
8648 return error_mark_node;
8650 /* [dcl.fct.default]
8652 A default argument expression is implicitly converted to the
8654 if (!TREE_TYPE (arg)
8655 || !can_convert_arg (decl_type, TREE_TYPE (arg), arg, LOOKUP_NORMAL))
8658 error ("default argument for %q#D has type %qT",
8659 decl, TREE_TYPE (arg));
8661 error ("default argument for parameter of type %qT has type %qT",
8662 decl_type, TREE_TYPE (arg));
8664 return error_mark_node;
8667 /* [dcl.fct.default]
8669 Local variables shall not be used in default argument
8672 The keyword `this' shall not be used in a default argument of a
8674 var = walk_tree_without_duplicates (&arg, local_variable_p_walkfn,
8678 error ("default argument %qE uses local variable %qD", arg, var);
8679 return error_mark_node;
8686 /* Decode the list of parameter types for a function type.
8687 Given the list of things declared inside the parens,
8688 return a list of types.
8690 If this parameter does not end with an ellipsis, we append
8693 *PARMS is set to the chain of PARM_DECLs created. */
8696 grokparms (cp_parameter_declarator *first_parm, tree *parms)
8698 tree result = NULL_TREE;
8699 tree decls = NULL_TREE;
8700 int ellipsis = !first_parm || first_parm->ellipsis_p;
8701 cp_parameter_declarator *parm;
8704 for (parm = first_parm; parm != NULL; parm = parm->next)
8706 tree type = NULL_TREE;
8707 tree init = parm->default_argument;
8711 if (parm == no_parameters)
8714 attrs = parm->decl_specifiers.attributes;
8715 parm->decl_specifiers.attributes = NULL_TREE;
8716 decl = grokdeclarator (parm->declarator, &parm->decl_specifiers,
8717 PARM, init != NULL_TREE, &attrs);
8718 if (! decl || TREE_TYPE (decl) == error_mark_node)
8722 cplus_decl_attributes (&decl, attrs, 0);
8724 type = TREE_TYPE (decl);
8725 if (VOID_TYPE_P (type))
8727 if (same_type_p (type, void_type_node)
8728 && DECL_SELF_REFERENCE_P (type)
8729 && !DECL_NAME (decl) && !result && !parm->next && !ellipsis)
8730 /* this is a parmlist of `(void)', which is ok. */
8732 cxx_incomplete_type_error (decl, type);
8733 /* It's not a good idea to actually create parameters of
8734 type `void'; other parts of the compiler assume that a
8735 void type terminates the parameter list. */
8736 type = error_mark_node;
8737 TREE_TYPE (decl) = error_mark_node;
8740 if (type != error_mark_node)
8742 /* Top-level qualifiers on the parameters are
8743 ignored for function types. */
8744 type = cp_build_qualified_type (type, 0);
8745 if (TREE_CODE (type) == METHOD_TYPE)
8747 error ("parameter %qD invalidly declared method type", decl);
8748 type = build_pointer_type (type);
8749 TREE_TYPE (decl) = type;
8751 else if (abstract_virtuals_error (decl, type))
8752 any_error = 1; /* Seems like a good idea. */
8753 else if (POINTER_TYPE_P (type))
8755 /* [dcl.fct]/6, parameter types cannot contain pointers
8756 (references) to arrays of unknown bound. */
8757 tree t = TREE_TYPE (type);
8758 int ptr = TYPE_PTR_P (type);
8764 else if (TREE_CODE (t) != ARRAY_TYPE)
8766 else if (!TYPE_DOMAIN (t))
8770 if (TREE_CODE (t) == ARRAY_TYPE)
8771 error ("parameter %qD includes %s to array of unknown "
8773 decl, ptr ? "pointer" : "reference", t);
8778 else if (init && !processing_template_decl)
8779 init = check_default_argument (decl, init);
8782 TREE_CHAIN (decl) = decls;
8784 result = tree_cons (init, type, result);
8786 decls = nreverse (decls);
8787 result = nreverse (result);
8789 result = chainon (result, void_list_node);
8796 /* D is a constructor or overloaded `operator='.
8798 Let T be the class in which D is declared. Then, this function
8801 -1 if D's is an ill-formed constructor or copy assignment operator
8802 whose first parameter is of type `T'.
8803 0 if D is not a copy constructor or copy assignment
8805 1 if D is a copy constructor or copy assignment operator whose
8806 first parameter is a reference to const qualified T.
8807 2 if D is a copy constructor or copy assignment operator whose
8808 first parameter is a reference to non-const qualified T.
8810 This function can be used as a predicate. Positive values indicate
8811 a copy constructor and nonzero values indicate a copy assignment
8821 gcc_assert (DECL_FUNCTION_MEMBER_P (d));
8823 if (TREE_CODE (d) == TEMPLATE_DECL
8824 || (DECL_TEMPLATE_INFO (d)
8825 && DECL_MEMBER_TEMPLATE_P (DECL_TI_TEMPLATE (d))))
8826 /* Instantiations of template member functions are never copy
8827 functions. Note that member functions of templated classes are
8828 represented as template functions internally, and we must
8829 accept those as copy functions. */
8832 args = FUNCTION_FIRST_USER_PARMTYPE (d);
8836 arg_type = TREE_VALUE (args);
8837 if (arg_type == error_mark_node)
8840 if (TYPE_MAIN_VARIANT (arg_type) == DECL_CONTEXT (d))
8842 /* Pass by value copy assignment operator. */
8845 else if (TREE_CODE (arg_type) == REFERENCE_TYPE
8846 && TYPE_MAIN_VARIANT (TREE_TYPE (arg_type)) == DECL_CONTEXT (d))
8848 if (CP_TYPE_CONST_P (TREE_TYPE (arg_type)))
8854 args = TREE_CHAIN (args);
8856 if (args && args != void_list_node && !TREE_PURPOSE (args))
8857 /* There are more non-optional args. */
8863 /* Remember any special properties of member function DECL. */
8865 void grok_special_member_properties (tree decl)
8869 if (!DECL_NONSTATIC_MEMBER_FUNCTION_P (decl))
8872 class_type = DECL_CONTEXT (decl);
8873 if (DECL_CONSTRUCTOR_P (decl))
8875 int ctor = copy_fn_p (decl);
8877 TYPE_HAS_CONSTRUCTOR (class_type) = 1;
8883 A non-template constructor for class X is a copy
8884 constructor if its first parameter is of type X&, const
8885 X&, volatile X& or const volatile X&, and either there
8886 are no other parameters or else all other parameters have
8887 default arguments. */
8888 TYPE_HAS_INIT_REF (class_type) = 1;
8890 TYPE_HAS_CONST_INIT_REF (class_type) = 1;
8892 else if (sufficient_parms_p (FUNCTION_FIRST_USER_PARMTYPE (decl)))
8893 TYPE_HAS_DEFAULT_CONSTRUCTOR (class_type) = 1;
8895 else if (DECL_OVERLOADED_OPERATOR_P (decl) == NOP_EXPR)
8899 A non-template assignment operator for class X is a copy
8900 assignment operator if its parameter is of type X, X&, const
8901 X&, volatile X& or const volatile X&. */
8903 int assop = copy_fn_p (decl);
8907 TYPE_HAS_ASSIGN_REF (class_type) = 1;
8909 TYPE_HAS_CONST_ASSIGN_REF (class_type) = 1;
8914 /* Check a constructor DECL has the correct form. Complains
8915 if the class has a constructor of the form X(X). */
8918 grok_ctor_properties (tree ctype, tree decl)
8920 int ctor_parm = copy_fn_p (decl);
8926 A declaration of a constructor for a class X is ill-formed if
8927 its first parameter is of type (optionally cv-qualified) X
8928 and either there are no other parameters or else all other
8929 parameters have default arguments.
8931 We *don't* complain about member template instantiations that
8932 have this form, though; they can occur as we try to decide
8933 what constructor to use during overload resolution. Since
8934 overload resolution will never prefer such a constructor to
8935 the non-template copy constructor (which is either explicitly
8936 or implicitly defined), there's no need to worry about their
8937 existence. Theoretically, they should never even be
8938 instantiated, but that's hard to forestall. */
8939 error ("invalid constructor; you probably meant %<%T (const %T&)%>",
8947 /* An operator with this code is unary, but can also be binary. */
8950 ambi_op_p (enum tree_code code)
8952 return (code == INDIRECT_REF
8953 || code == ADDR_EXPR
8954 || code == UNARY_PLUS_EXPR
8955 || code == NEGATE_EXPR
8956 || code == PREINCREMENT_EXPR
8957 || code == PREDECREMENT_EXPR);
8960 /* An operator with this name can only be unary. */
8963 unary_op_p (enum tree_code code)
8965 return (code == TRUTH_NOT_EXPR
8966 || code == BIT_NOT_EXPR
8967 || code == COMPONENT_REF
8968 || code == TYPE_EXPR);
8971 /* DECL is a declaration for an overloaded operator. If COMPLAIN is true,
8972 errors are issued for invalid declarations. */
8975 grok_op_properties (tree decl, bool complain)
8977 tree argtypes = TYPE_ARG_TYPES (TREE_TYPE (decl));
8979 int methodp = (TREE_CODE (TREE_TYPE (decl)) == METHOD_TYPE);
8980 tree name = DECL_NAME (decl);
8981 enum tree_code operator_code;
8986 /* Count the number of arguments and check for ellipsis. */
8987 for (argtype = argtypes, arity = 0;
8988 argtype && argtype != void_list_node;
8989 argtype = TREE_CHAIN (argtype))
8991 ellipsis_p = !argtype;
8993 class_type = DECL_CONTEXT (decl);
8994 if (class_type && !CLASS_TYPE_P (class_type))
8995 class_type = NULL_TREE;
8997 if (DECL_CONV_FN_P (decl))
8998 operator_code = TYPE_EXPR;
9002 #define DEF_OPERATOR(NAME, CODE, MANGLING, ARITY, ASSN_P) \
9003 if (ansi_opname (CODE) == name) \
9005 operator_code = (CODE); \
9008 else if (ansi_assopname (CODE) == name) \
9010 operator_code = (CODE); \
9011 DECL_ASSIGNMENT_OPERATOR_P (decl) = 1; \
9015 #include "operators.def"
9021 gcc_assert (operator_code != LAST_CPLUS_TREE_CODE);
9022 SET_OVERLOADED_OPERATOR_CODE (decl, operator_code);
9025 switch (operator_code)
9028 TYPE_HAS_NEW_OPERATOR (class_type) = 1;
9032 TYPE_GETS_DELETE (class_type) |= 1;
9036 TYPE_HAS_ARRAY_NEW_OPERATOR (class_type) = 1;
9039 case VEC_DELETE_EXPR:
9040 TYPE_GETS_DELETE (class_type) |= 2;
9047 /* [basic.std.dynamic.allocation]/1:
9049 A program is ill-formed if an allocation function is declared
9050 in a namespace scope other than global scope or declared static
9053 The same also holds true for deallocation functions. */
9054 if (operator_code == NEW_EXPR || operator_code == VEC_NEW_EXPR
9055 || operator_code == DELETE_EXPR || operator_code == VEC_DELETE_EXPR)
9057 if (DECL_NAMESPACE_SCOPE_P (decl))
9059 if (CP_DECL_CONTEXT (decl) != global_namespace)
9060 error ("%qD may not be declared within a namespace", decl);
9061 else if (!TREE_PUBLIC (decl))
9062 error ("%qD may not be declared as static", decl);
9066 if (operator_code == NEW_EXPR || operator_code == VEC_NEW_EXPR)
9067 TREE_TYPE (decl) = coerce_new_type (TREE_TYPE (decl));
9068 else if (operator_code == DELETE_EXPR || operator_code == VEC_DELETE_EXPR)
9069 TREE_TYPE (decl) = coerce_delete_type (TREE_TYPE (decl));
9072 /* An operator function must either be a non-static member function
9073 or have at least one parameter of a class, a reference to a class,
9074 an enumeration, or a reference to an enumeration. 13.4.0.6 */
9075 if (! methodp || DECL_STATIC_FUNCTION_P (decl))
9077 if (operator_code == TYPE_EXPR
9078 || operator_code == CALL_EXPR
9079 || operator_code == COMPONENT_REF
9080 || operator_code == ARRAY_REF
9081 || operator_code == NOP_EXPR)
9083 error ("%qD must be a nonstatic member function", decl);
9090 if (DECL_STATIC_FUNCTION_P (decl))
9092 error ("%qD must be either a non-static member "
9093 "function or a non-member function", decl);
9097 for (p = argtypes; p && p != void_list_node; p = TREE_CHAIN (p))
9099 tree arg = non_reference (TREE_VALUE (p));
9100 if (arg == error_mark_node)
9103 /* IS_AGGR_TYPE, rather than CLASS_TYPE_P, is used
9104 because these checks are performed even on
9105 template functions. */
9106 if (IS_AGGR_TYPE (arg) || TREE_CODE (arg) == ENUMERAL_TYPE)
9110 if (!p || p == void_list_node)
9115 error ("%qD must have an argument of class or "
9122 /* There are no restrictions on the arguments to an overloaded
9124 if (operator_code == CALL_EXPR)
9127 /* Warn about conversion operators that will never be used. */
9128 if (IDENTIFIER_TYPENAME_P (name)
9129 && ! DECL_TEMPLATE_INFO (decl)
9131 /* Warn only declaring the function; there is no need to
9132 warn again about out-of-class definitions. */
9133 && class_type == current_class_type)
9135 tree t = TREE_TYPE (name);
9136 int ref = (TREE_CODE (t) == REFERENCE_TYPE);
9137 const char *what = 0;
9140 t = TYPE_MAIN_VARIANT (TREE_TYPE (t));
9142 if (TREE_CODE (t) == VOID_TYPE)
9144 else if (class_type)
9146 if (t == class_type)
9147 what = "the same type";
9148 /* Don't force t to be complete here. */
9149 else if (IS_AGGR_TYPE (t)
9150 && COMPLETE_TYPE_P (t)
9151 && DERIVED_FROM_P (t, class_type))
9152 what = "a base class";
9156 warning (OPT_Wconversion, "conversion to %s%s will never use a type "
9157 "conversion operator",
9158 ref ? "a reference to " : "", what);
9161 if (operator_code == COND_EXPR)
9164 error ("ISO C++ prohibits overloading operator ?:");
9166 else if (ellipsis_p)
9167 error ("%qD must not have variable number of arguments", decl);
9168 else if (ambi_op_p (operator_code))
9171 /* We pick the one-argument operator codes by default, so
9172 we don't have to change anything. */
9174 else if (arity == 2)
9176 /* If we thought this was a unary operator, we now know
9177 it to be a binary operator. */
9178 switch (operator_code)
9181 operator_code = MULT_EXPR;
9185 operator_code = BIT_AND_EXPR;
9188 case UNARY_PLUS_EXPR:
9189 operator_code = PLUS_EXPR;
9193 operator_code = MINUS_EXPR;
9196 case PREINCREMENT_EXPR:
9197 operator_code = POSTINCREMENT_EXPR;
9200 case PREDECREMENT_EXPR:
9201 operator_code = POSTDECREMENT_EXPR;
9208 SET_OVERLOADED_OPERATOR_CODE (decl, operator_code);
9210 if ((operator_code == POSTINCREMENT_EXPR
9211 || operator_code == POSTDECREMENT_EXPR)
9212 && ! processing_template_decl
9213 && ! same_type_p (TREE_VALUE (TREE_CHAIN (argtypes)), integer_type_node))
9216 error ("postfix %qD must take %<int%> as its argument",
9220 ("postfix %qD must take %<int%> as its second argument",
9227 error ("%qD must take either zero or one argument", decl);
9229 error ("%qD must take either one or two arguments", decl);
9232 /* More Effective C++ rule 6. */
9234 && (operator_code == POSTINCREMENT_EXPR
9235 || operator_code == POSTDECREMENT_EXPR
9236 || operator_code == PREINCREMENT_EXPR
9237 || operator_code == PREDECREMENT_EXPR))
9239 tree arg = TREE_VALUE (argtypes);
9240 tree ret = TREE_TYPE (TREE_TYPE (decl));
9241 if (methodp || TREE_CODE (arg) == REFERENCE_TYPE)
9242 arg = TREE_TYPE (arg);
9243 arg = TYPE_MAIN_VARIANT (arg);
9244 if (operator_code == PREINCREMENT_EXPR
9245 || operator_code == PREDECREMENT_EXPR)
9247 if (TREE_CODE (ret) != REFERENCE_TYPE
9248 || !same_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (ret)),
9250 warning (OPT_Weffc__, "prefix %qD should return %qT", decl,
9251 build_reference_type (arg));
9255 if (!same_type_p (TYPE_MAIN_VARIANT (ret), arg))
9256 warning (OPT_Weffc__, "postfix %qD should return %qT", decl, arg);
9260 else if (unary_op_p (operator_code))
9265 error ("%qD must take %<void%>", decl);
9267 error ("%qD must take exactly one argument", decl);
9270 else /* if (binary_op_p (operator_code)) */
9275 error ("%qD must take exactly one argument", decl);
9277 error ("%qD must take exactly two arguments", decl);
9280 /* More Effective C++ rule 7. */
9282 && (operator_code == TRUTH_ANDIF_EXPR
9283 || operator_code == TRUTH_ORIF_EXPR
9284 || operator_code == COMPOUND_EXPR))
9285 warning (OPT_Weffc__, "user-defined %qD always evaluates both arguments",
9289 /* Effective C++ rule 23. */
9292 && !DECL_ASSIGNMENT_OPERATOR_P (decl)
9293 && (operator_code == PLUS_EXPR
9294 || operator_code == MINUS_EXPR
9295 || operator_code == TRUNC_DIV_EXPR
9296 || operator_code == MULT_EXPR
9297 || operator_code == TRUNC_MOD_EXPR)
9298 && TREE_CODE (TREE_TYPE (TREE_TYPE (decl))) == REFERENCE_TYPE)
9299 warning (OPT_Weffc__, "%qD should return by value", decl);
9302 for (; argtypes && argtypes != void_list_node;
9303 argtypes = TREE_CHAIN (argtypes))
9304 if (TREE_PURPOSE (argtypes))
9306 TREE_PURPOSE (argtypes) = NULL_TREE;
9307 if (operator_code == POSTINCREMENT_EXPR
9308 || operator_code == POSTDECREMENT_EXPR)
9311 pedwarn ("%qD cannot have default arguments", decl);
9314 error ("%qD cannot have default arguments", decl);
9321 /* Return a string giving the keyword associate with CODE. */
9324 tag_name (enum tag_types code)
9343 /* Name lookup in an elaborated-type-specifier (after the keyword
9344 indicated by TAG_CODE) has found the TYPE_DECL DECL. If the
9345 elaborated-type-specifier is invalid, issue a diagnostic and return
9346 error_mark_node; otherwise, return the *_TYPE to which it referred.
9347 If ALLOW_TEMPLATE_P is true, TYPE may be a class template. */
9350 check_elaborated_type_specifier (enum tag_types tag_code,
9352 bool allow_template_p)
9358 struct S { struct S *p; };
9360 name lookup will find the TYPE_DECL for the implicit "S::S"
9361 typedef. Adjust for that here. */
9362 if (DECL_SELF_REFERENCE_P (decl))
9363 decl = TYPE_NAME (TREE_TYPE (decl));
9365 type = TREE_TYPE (decl);
9367 /* Check TEMPLATE_TYPE_PARM first because DECL_IMPLICIT_TYPEDEF_P
9368 is false for this case as well. */
9369 if (TREE_CODE (type) == TEMPLATE_TYPE_PARM)
9371 error ("using template type parameter %qT after %qs",
9372 type, tag_name (tag_code));
9373 return error_mark_node;
9377 If the identifier resolves to a typedef-name or a template
9378 type-parameter, the elaborated-type-specifier is ill-formed.
9380 In other words, the only legitimate declaration to use in the
9381 elaborated type specifier is the implicit typedef created when
9382 the type is declared. */
9383 else if (!DECL_IMPLICIT_TYPEDEF_P (decl)
9384 && tag_code != typename_type)
9386 error ("using typedef-name %qD after %qs", decl, tag_name (tag_code));
9387 error ("%q+D has a previous declaration here", decl);
9388 return error_mark_node;
9390 else if (TREE_CODE (type) != RECORD_TYPE
9391 && TREE_CODE (type) != UNION_TYPE
9392 && tag_code != enum_type
9393 && tag_code != typename_type)
9395 error ("%qT referred to as %qs", type, tag_name (tag_code));
9396 error ("%q+T has a previous declaration here", type);
9397 return error_mark_node;
9399 else if (TREE_CODE (type) != ENUMERAL_TYPE
9400 && tag_code == enum_type)
9402 error ("%qT referred to as enum", type);
9403 error ("%q+T has a previous declaration here", type);
9404 return error_mark_node;
9406 else if (!allow_template_p
9407 && TREE_CODE (type) == RECORD_TYPE
9408 && CLASSTYPE_IS_TEMPLATE (type))
9410 /* If a class template appears as elaborated type specifier
9411 without a template header such as:
9413 template <class T> class C {};
9414 void f(class C); // No template header here
9416 then the required template argument is missing. */
9417 error ("template argument required for %<%s %T%>",
9418 tag_name (tag_code),
9419 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type)));
9420 return error_mark_node;
9426 /* Lookup NAME in elaborate type specifier in scope according to
9427 SCOPE and issue diagnostics if necessary.
9428 Return *_TYPE node upon success, NULL_TREE when the NAME is not
9429 found, and ERROR_MARK_NODE for type error. */
9432 lookup_and_check_tag (enum tag_types tag_code, tree name,
9433 tag_scope scope, bool template_header_p)
9437 if (scope == ts_global)
9439 /* First try ordinary name lookup, ignoring hidden class name
9440 injected via friend declaration. */
9441 decl = lookup_name_prefer_type (name, 2);
9442 /* If that fails, the name will be placed in the smallest
9443 non-class, non-function-prototype scope according to 3.3.1/5.
9444 We may already have a hidden name declared as friend in this
9445 scope. So lookup again but not ignoring hidden name.
9446 If we find one, that name will be made visible rather than
9447 creating a new tag. */
9449 decl = lookup_type_scope (name, ts_within_enclosing_non_class);
9452 decl = lookup_type_scope (name, scope);
9454 if (decl && DECL_CLASS_TEMPLATE_P (decl))
9455 decl = DECL_TEMPLATE_RESULT (decl);
9457 if (decl && TREE_CODE (decl) == TYPE_DECL)
9459 /* Look for invalid nested type:
9463 if (scope == ts_current && DECL_SELF_REFERENCE_P (decl))
9465 error ("%qD has the same name as the class in which it is "
9468 return error_mark_node;
9471 /* Two cases we need to consider when deciding if a class
9472 template is allowed as an elaborated type specifier:
9473 1. It is a self reference to its own class.
9474 2. It comes with a template header.
9478 template <class T> class C {
9479 class C *c1; // DECL_SELF_REFERENCE_P is true
9482 template <class U> class C; // template_header_p is true
9483 template <class T> class C<T>::D {
9484 class C *c2; // DECL_SELF_REFERENCE_P is true
9487 t = check_elaborated_type_specifier (tag_code,
9490 | DECL_SELF_REFERENCE_P (decl));
9497 /* Get the struct, enum or union (TAG_CODE says which) with tag NAME.
9498 Define the tag as a forward-reference if it is not defined.
9500 If a declaration is given, process it here, and report an error if
9501 multiple declarations are not identical.
9503 SCOPE is TS_CURRENT when this is also a definition. Only look in
9504 the current frame for the name (since C++ allows new names in any
9505 scope.) It is TS_WITHIN_ENCLOSING_NON_CLASS if this is a friend
9506 declaration. Only look beginning from the current scope outward up
9507 till the nearest non-class scope. Otherwise it is TS_GLOBAL.
9509 TEMPLATE_HEADER_P is true when this declaration is preceded by
9510 a set of template parameters. */
9513 xref_tag (enum tag_types tag_code, tree name,
9514 tag_scope scope, bool template_header_p)
9516 enum tree_code code;
9518 tree context = NULL_TREE;
9520 timevar_push (TV_NAME_LOOKUP);
9522 gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE);
9534 code = ENUMERAL_TYPE;
9540 /* In case of anonymous name, xref_tag is only called to
9541 make type node and push name. Name lookup is not required. */
9542 if (ANON_AGGRNAME_P (name))
9545 t = lookup_and_check_tag (tag_code, name,
9546 scope, template_header_p);
9548 if (t == error_mark_node)
9549 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
9551 if (scope != ts_current && t && current_class_type
9552 && template_class_depth (current_class_type)
9553 && template_header_p)
9555 /* Since SCOPE is not TS_CURRENT, we are not looking at a
9556 definition of this tag. Since, in addition, we are currently
9557 processing a (member) template declaration of a template
9558 class, we must be very careful; consider:
9565 { template <class V>
9566 friend struct S1; };
9568 Here, the S2::S1 declaration should not be confused with the
9569 outer declaration. In particular, the inner version should
9570 have a template parameter of level 2, not level 1. This
9571 would be particularly important if the member declaration
9574 template <class V = U> friend struct S1;
9576 say, when we should tsubst into `U' when instantiating
9577 S2. On the other hand, when presented with:
9587 we must find the inner binding eventually. We
9588 accomplish this by making sure that the new type we
9589 create to represent this declaration has the right
9591 context = TYPE_CONTEXT (t);
9597 /* If no such tag is yet defined, create a forward-reference node
9598 and record it as the "definition".
9599 When a real declaration of this type is found,
9600 the forward-reference will be altered into a real type. */
9601 if (code == ENUMERAL_TYPE)
9603 error ("use of enum %q#D without previous declaration", name);
9604 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
9608 t = make_aggr_type (code);
9609 TYPE_CONTEXT (t) = context;
9610 t = pushtag (name, t, scope);
9615 if (template_header_p && IS_AGGR_TYPE (t))
9616 redeclare_class_template (t, current_template_parms);
9617 else if (!processing_template_decl
9619 && CLASSTYPE_IS_TEMPLATE (t))
9621 error ("redeclaration of %qT as a non-template", t);
9622 t = error_mark_node;
9625 /* Make injected friend class visible. */
9626 if (scope != ts_within_enclosing_non_class
9627 && hidden_name_p (TYPE_NAME (t)))
9629 DECL_ANTICIPATED (TYPE_NAME (t)) = 0;
9630 DECL_FRIEND_P (TYPE_NAME (t)) = 0;
9632 if (TYPE_TEMPLATE_INFO (t))
9634 DECL_ANTICIPATED (TYPE_TI_TEMPLATE (t)) = 0;
9635 DECL_FRIEND_P (TYPE_TI_TEMPLATE (t)) = 0;
9640 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, t);
9644 xref_tag_from_type (tree old, tree id, tag_scope scope)
9646 enum tag_types tag_kind;
9648 if (TREE_CODE (old) == RECORD_TYPE)
9649 tag_kind = (CLASSTYPE_DECLARED_CLASS (old) ? class_type : record_type);
9651 tag_kind = union_type;
9653 if (id == NULL_TREE)
9654 id = TYPE_IDENTIFIER (old);
9656 return xref_tag (tag_kind, id, scope, false);
9659 /* Create the binfo hierarchy for REF with (possibly NULL) base list
9660 BASE_LIST. For each element on BASE_LIST the TREE_PURPOSE is an
9661 access_* node, and the TREE_VALUE is the type of the base-class.
9662 Non-NULL TREE_TYPE indicates virtual inheritance. */
9665 xref_basetypes (tree ref, tree base_list)
9668 tree binfo, base_binfo;
9669 unsigned max_vbases = 0; /* Maximum direct & indirect virtual bases. */
9670 unsigned max_bases = 0; /* Maximum direct bases. */
9672 tree default_access;
9673 tree igo_prev; /* Track Inheritance Graph Order. */
9675 if (ref == error_mark_node)
9678 /* The base of a derived class is private by default, all others are
9680 default_access = (TREE_CODE (ref) == RECORD_TYPE
9681 && CLASSTYPE_DECLARED_CLASS (ref)
9682 ? access_private_node : access_public_node);
9684 /* First, make sure that any templates in base-classes are
9685 instantiated. This ensures that if we call ourselves recursively
9686 we do not get confused about which classes are marked and which
9691 tree basetype = TREE_VALUE (*basep);
9693 if (!(processing_template_decl && uses_template_parms (basetype))
9694 && !complete_type_or_else (basetype, NULL))
9695 /* An incomplete type. Remove it from the list. */
9696 *basep = TREE_CHAIN (*basep);
9700 if (TREE_TYPE (*basep))
9702 if (CLASS_TYPE_P (basetype))
9703 max_vbases += VEC_length (tree, CLASSTYPE_VBASECLASSES (basetype));
9704 basep = &TREE_CHAIN (*basep);
9708 TYPE_MARKED_P (ref) = 1;
9710 /* The binfo slot should be empty, unless this is an (ill-formed)
9712 gcc_assert (!TYPE_BINFO (ref) || TYPE_SIZE (ref));
9713 gcc_assert (TYPE_MAIN_VARIANT (ref) == ref);
9715 binfo = make_tree_binfo (max_bases);
9717 TYPE_BINFO (ref) = binfo;
9718 BINFO_OFFSET (binfo) = size_zero_node;
9719 BINFO_TYPE (binfo) = ref;
9723 BINFO_BASE_ACCESSES (binfo) = VEC_alloc (tree, gc, max_bases);
9724 /* An aggregate cannot have baseclasses. */
9725 CLASSTYPE_NON_AGGREGATE (ref) = 1;
9727 if (TREE_CODE (ref) == UNION_TYPE)
9728 error ("derived union %qT invalid", ref);
9733 if (TYPE_FOR_JAVA (ref))
9734 error ("Java class %qT cannot have multiple bases", ref);
9739 CLASSTYPE_VBASECLASSES (ref) = VEC_alloc (tree, gc, max_vbases);
9741 if (TYPE_FOR_JAVA (ref))
9742 error ("Java class %qT cannot have virtual bases", ref);
9745 for (igo_prev = binfo; base_list; base_list = TREE_CHAIN (base_list))
9747 tree access = TREE_PURPOSE (base_list);
9748 int via_virtual = TREE_TYPE (base_list) != NULL_TREE;
9749 tree basetype = TREE_VALUE (base_list);
9751 if (access == access_default_node)
9752 access = default_access;
9754 if (TREE_CODE (basetype) == TYPE_DECL)
9755 basetype = TREE_TYPE (basetype);
9756 if (TREE_CODE (basetype) != RECORD_TYPE
9757 && TREE_CODE (basetype) != TYPENAME_TYPE
9758 && TREE_CODE (basetype) != TEMPLATE_TYPE_PARM
9759 && TREE_CODE (basetype) != BOUND_TEMPLATE_TEMPLATE_PARM)
9761 error ("base type %qT fails to be a struct or class type",
9766 if (TYPE_FOR_JAVA (basetype) && (current_lang_depth () == 0))
9767 TYPE_FOR_JAVA (ref) = 1;
9769 base_binfo = NULL_TREE;
9770 if (CLASS_TYPE_P (basetype) && !dependent_type_p (basetype))
9772 base_binfo = TYPE_BINFO (basetype);
9773 /* The original basetype could have been a typedef'd type. */
9774 basetype = BINFO_TYPE (base_binfo);
9776 /* Inherit flags from the base. */
9777 TYPE_HAS_NEW_OPERATOR (ref)
9778 |= TYPE_HAS_NEW_OPERATOR (basetype);
9779 TYPE_HAS_ARRAY_NEW_OPERATOR (ref)
9780 |= TYPE_HAS_ARRAY_NEW_OPERATOR (basetype);
9781 TYPE_GETS_DELETE (ref) |= TYPE_GETS_DELETE (basetype);
9782 TYPE_HAS_CONVERSION (ref) |= TYPE_HAS_CONVERSION (basetype);
9783 CLASSTYPE_DIAMOND_SHAPED_P (ref)
9784 |= CLASSTYPE_DIAMOND_SHAPED_P (basetype);
9785 CLASSTYPE_REPEATED_BASE_P (ref)
9786 |= CLASSTYPE_REPEATED_BASE_P (basetype);
9789 /* We must do this test after we've seen through a typedef
9791 if (TYPE_MARKED_P (basetype))
9793 if (basetype == ref)
9794 error ("recursive type %qT undefined", basetype);
9796 error ("duplicate base type %qT invalid", basetype);
9799 TYPE_MARKED_P (basetype) = 1;
9801 base_binfo = copy_binfo (base_binfo, basetype, ref,
9802 &igo_prev, via_virtual);
9803 if (!BINFO_INHERITANCE_CHAIN (base_binfo))
9804 BINFO_INHERITANCE_CHAIN (base_binfo) = binfo;
9806 BINFO_BASE_APPEND (binfo, base_binfo);
9807 BINFO_BASE_ACCESS_APPEND (binfo, access);
9810 if (VEC_space (tree, CLASSTYPE_VBASECLASSES (ref), 1))
9811 /* If we have space in the vbase vector, we must have shared at
9812 least one of them, and are therefore diamond shaped. */
9813 CLASSTYPE_DIAMOND_SHAPED_P (ref) = 1;
9815 /* Unmark all the types. */
9816 for (i = 0; BINFO_BASE_ITERATE (binfo, i, base_binfo); i++)
9817 TYPE_MARKED_P (BINFO_TYPE (base_binfo)) = 0;
9818 TYPE_MARKED_P (ref) = 0;
9820 /* Now see if we have a repeated base type. */
9821 if (!CLASSTYPE_REPEATED_BASE_P (ref))
9823 for (base_binfo = binfo; base_binfo;
9824 base_binfo = TREE_CHAIN (base_binfo))
9826 if (TYPE_MARKED_P (BINFO_TYPE (base_binfo)))
9828 CLASSTYPE_REPEATED_BASE_P (ref) = 1;
9831 TYPE_MARKED_P (BINFO_TYPE (base_binfo)) = 1;
9833 for (base_binfo = binfo; base_binfo;
9834 base_binfo = TREE_CHAIN (base_binfo))
9835 if (TYPE_MARKED_P (BINFO_TYPE (base_binfo)))
9836 TYPE_MARKED_P (BINFO_TYPE (base_binfo)) = 0;
9843 /* Begin compiling the definition of an enumeration type.
9845 Returns the type object, as yet incomplete.
9846 Also records info about it so that build_enumerator
9847 may be used to declare the individual values as they are read. */
9850 start_enum (tree name)
9854 gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE);
9856 /* If this is the real definition for a previous forward reference,
9857 fill in the contents in the same object that used to be the
9858 forward reference. */
9860 enumtype = lookup_and_check_tag (enum_type, name,
9861 /*tag_scope=*/ts_current,
9862 /*template_header_p=*/false);
9864 if (enumtype != NULL_TREE && TREE_CODE (enumtype) == ENUMERAL_TYPE)
9866 error ("multiple definition of %q#T", enumtype);
9867 error ("%Jprevious definition here", TYPE_MAIN_DECL (enumtype));
9868 /* Clear out TYPE_VALUES, and start again. */
9869 TYPE_VALUES (enumtype) = NULL_TREE;
9873 /* In case of error, make a dummy enum to allow parsing to
9875 if (enumtype == error_mark_node)
9876 name = make_anon_name ();
9878 enumtype = make_node (ENUMERAL_TYPE);
9879 enumtype = pushtag (name, enumtype, /*tag_scope=*/ts_current);
9885 /* After processing and defining all the values of an enumeration type,
9886 install their decls in the enumeration type and finish it off.
9887 ENUMTYPE is the type object and VALUES a list of name-value pairs. */
9890 finish_enum (tree enumtype)
9899 bool use_short_enum;
9903 integer_type_kind itk;
9904 tree underlying_type = NULL_TREE;
9906 /* We built up the VALUES in reverse order. */
9907 TYPE_VALUES (enumtype) = nreverse (TYPE_VALUES (enumtype));
9909 /* For an enum defined in a template, just set the type of the values;
9910 all further processing is postponed until the template is
9911 instantiated. We need to set the type so that tsubst of a CONST_DECL
9913 if (processing_template_decl)
9915 for (values = TYPE_VALUES (enumtype);
9917 values = TREE_CHAIN (values))
9918 TREE_TYPE (TREE_VALUE (values)) = enumtype;
9919 if (at_function_scope_p ())
9920 add_stmt (build_min (TAG_DEFN, enumtype));
9924 /* Determine the minimum and maximum values of the enumerators. */
9925 if (TYPE_VALUES (enumtype))
9927 minnode = maxnode = NULL_TREE;
9929 for (values = TYPE_VALUES (enumtype);
9931 values = TREE_CHAIN (values))
9933 decl = TREE_VALUE (values);
9935 /* [dcl.enum]: Following the closing brace of an enum-specifier,
9936 each enumerator has the type of its enumeration. Prior to the
9937 closing brace, the type of each enumerator is the type of its
9938 initializing value. */
9939 TREE_TYPE (decl) = enumtype;
9941 /* Update the minimum and maximum values, if appropriate. */
9942 value = DECL_INITIAL (decl);
9943 if (value == error_mark_node)
9944 value = integer_zero_node;
9945 /* Figure out what the minimum and maximum values of the
9948 minnode = maxnode = value;
9949 else if (tree_int_cst_lt (maxnode, value))
9951 else if (tree_int_cst_lt (value, minnode))
9958 If the enumerator-list is empty, the underlying type is as if
9959 the enumeration had a single enumerator with value 0. */
9960 minnode = maxnode = integer_zero_node;
9962 /* Compute the number of bits require to represent all values of the
9963 enumeration. We must do this before the type of MINNODE and
9964 MAXNODE are transformed, since min_precision relies on the
9965 TREE_TYPE of the value it is passed. */
9966 unsignedp = tree_int_cst_sgn (minnode) >= 0;
9967 lowprec = min_precision (minnode, unsignedp);
9968 highprec = min_precision (maxnode, unsignedp);
9969 precision = MAX (lowprec, highprec);
9971 /* Determine the underlying type of the enumeration.
9975 The underlying type of an enumeration is an integral type that
9976 can represent all the enumerator values defined in the
9977 enumeration. It is implementation-defined which integral type is
9978 used as the underlying type for an enumeration except that the
9979 underlying type shall not be larger than int unless the value of
9980 an enumerator cannot fit in an int or unsigned int.
9982 We use "int" or an "unsigned int" as the underlying type, even if
9983 a smaller integral type would work, unless the user has
9984 explicitly requested that we use the smallest possible type. The
9985 user can request that for all enumerations with a command line
9986 flag, or for just one enumeration with an attribute. */
9988 use_short_enum = flag_short_enums
9989 || lookup_attribute ("packed", TYPE_ATTRIBUTES (enumtype));
9991 for (itk = (use_short_enum ? itk_char : itk_int);
9995 underlying_type = integer_types[itk];
9996 if (TYPE_PRECISION (underlying_type) >= precision
9997 && TYPE_UNSIGNED (underlying_type) == unsignedp)
10000 if (itk == itk_none)
10004 IF no integral type can represent all the enumerator values, the
10005 enumeration is ill-formed. */
10006 error ("no integral type can represent all of the enumerator values "
10007 "for %qT", enumtype);
10008 precision = TYPE_PRECISION (long_long_integer_type_node);
10009 underlying_type = integer_types[itk_unsigned_long_long];
10012 /* Compute the minium and maximum values for the type.
10016 For an enumeration where emin is the smallest enumerator and emax
10017 is the largest, the values of the enumeration are the values of the
10018 underlying type in the range bmin to bmax, where bmin and bmax are,
10019 respectively, the smallest and largest values of the smallest bit-
10020 field that can store emin and emax. */
10022 /* The middle-end currently assumes that types with TYPE_PRECISION
10023 narrower than their underlying type are suitably zero or sign
10024 extended to fill their mode. g++ doesn't make these guarantees.
10025 Until the middle-end can represent such paradoxical types, we
10026 set the TYPE_PRECISION to the width of the underlying type. */
10027 TYPE_PRECISION (enumtype) = TYPE_PRECISION (underlying_type);
10029 set_min_and_max_values_for_integral_type (enumtype, precision, unsignedp);
10033 The value of sizeof() applied to an enumeration type, an object
10034 of an enumeration type, or an enumerator, is the value of sizeof()
10035 applied to the underlying type. */
10036 TYPE_SIZE (enumtype) = TYPE_SIZE (underlying_type);
10037 TYPE_SIZE_UNIT (enumtype) = TYPE_SIZE_UNIT (underlying_type);
10038 TYPE_MODE (enumtype) = TYPE_MODE (underlying_type);
10039 TYPE_ALIGN (enumtype) = TYPE_ALIGN (underlying_type);
10040 TYPE_USER_ALIGN (enumtype) = TYPE_USER_ALIGN (underlying_type);
10041 TYPE_UNSIGNED (enumtype) = TYPE_UNSIGNED (underlying_type);
10043 /* Convert each of the enumerators to the type of the underlying
10044 type of the enumeration. */
10045 for (values = TYPE_VALUES (enumtype); values; values = TREE_CHAIN (values))
10047 location_t saved_location;
10049 decl = TREE_VALUE (values);
10050 saved_location = input_location;
10051 input_location = DECL_SOURCE_LOCATION (decl);
10052 value = perform_implicit_conversion (underlying_type,
10053 DECL_INITIAL (decl));
10054 input_location = saved_location;
10056 /* Do not clobber shared ints. */
10057 value = copy_node (value);
10059 TREE_TYPE (value) = enumtype;
10060 DECL_INITIAL (decl) = value;
10061 TREE_VALUE (values) = value;
10064 /* Fix up all variant types of this enum type. */
10065 for (t = TYPE_MAIN_VARIANT (enumtype); t; t = TYPE_NEXT_VARIANT (t))
10067 TYPE_VALUES (t) = TYPE_VALUES (enumtype);
10068 TYPE_MIN_VALUE (t) = TYPE_MIN_VALUE (enumtype);
10069 TYPE_MAX_VALUE (t) = TYPE_MAX_VALUE (enumtype);
10070 TYPE_SIZE (t) = TYPE_SIZE (enumtype);
10071 TYPE_SIZE_UNIT (t) = TYPE_SIZE_UNIT (enumtype);
10072 TYPE_MODE (t) = TYPE_MODE (enumtype);
10073 TYPE_PRECISION (t) = TYPE_PRECISION (enumtype);
10074 TYPE_ALIGN (t) = TYPE_ALIGN (enumtype);
10075 TYPE_USER_ALIGN (t) = TYPE_USER_ALIGN (enumtype);
10076 TYPE_UNSIGNED (t) = TYPE_UNSIGNED (enumtype);
10079 /* Finish debugging output for this type. */
10080 rest_of_type_compilation (enumtype, namespace_bindings_p ());
10083 /* Build and install a CONST_DECL for an enumeration constant of the
10084 enumeration type ENUMTYPE whose NAME and VALUE (if any) are provided.
10085 Assignment of sequential values by default is handled here. */
10088 build_enumerator (tree name, tree value, tree enumtype)
10094 /* If the VALUE was erroneous, pretend it wasn't there; that will
10095 result in the enum being assigned the next value in sequence. */
10096 if (value == error_mark_node)
10099 /* Remove no-op casts from the value. */
10101 STRIP_TYPE_NOPS (value);
10103 if (! processing_template_decl)
10105 /* Validate and default VALUE. */
10106 if (value != NULL_TREE)
10108 value = integral_constant_value (value);
10110 if (TREE_CODE (value) == INTEGER_CST)
10112 value = perform_integral_promotions (value);
10113 constant_expression_warning (value);
10117 error ("enumerator value for %qD not integer constant", name);
10122 /* Default based on previous value. */
10123 if (value == NULL_TREE)
10125 if (TYPE_VALUES (enumtype))
10128 unsigned HOST_WIDE_INT lo;
10132 /* The next value is the previous value plus one. We can
10133 safely assume that the previous value is an INTEGER_CST.
10134 add_double doesn't know the type of the target expression,
10135 so we must check with int_fits_type_p as well. */
10136 prev_value = DECL_INITIAL (TREE_VALUE (TYPE_VALUES (enumtype)));
10137 overflowed = add_double (TREE_INT_CST_LOW (prev_value),
10138 TREE_INT_CST_HIGH (prev_value),
10140 value = build_int_cst_wide (TREE_TYPE (prev_value), lo, hi);
10141 overflowed |= !int_fits_type_p (value, TREE_TYPE (prev_value));
10145 error ("overflow in enumeration values at %qD", name);
10146 value = error_mark_node;
10150 value = integer_zero_node;
10153 /* Remove no-op casts from the value. */
10154 STRIP_TYPE_NOPS (value);
10157 /* C++ associates enums with global, function, or class declarations. */
10158 context = current_scope ();
10160 /* Build the actual enumeration constant. Note that the enumeration
10161 constants have the type of their initializers until the
10162 enumeration is complete:
10166 Following the closing brace of an enum-specifier, each enumer-
10167 ator has the type of its enumeration. Prior to the closing
10168 brace, the type of each enumerator is the type of its
10169 initializing value.
10171 In finish_enum we will reset the type. Of course, if we're
10172 processing a template, there may be no value. */
10173 type = value ? TREE_TYPE (value) : NULL_TREE;
10175 if (context && context == current_class_type)
10176 /* This enum declaration is local to the class. We need the full
10177 lang_decl so that we can record DECL_CLASS_CONTEXT, for example. */
10178 decl = build_lang_decl (CONST_DECL, name, type);
10180 /* It's a global enum, or it's local to a function. (Note local to
10181 a function could mean local to a class method. */
10182 decl = build_decl (CONST_DECL, name, type);
10184 DECL_CONTEXT (decl) = FROB_CONTEXT (context);
10185 TREE_CONSTANT (decl) = 1;
10186 TREE_INVARIANT (decl) = 1;
10187 TREE_READONLY (decl) = 1;
10188 DECL_INITIAL (decl) = value;
10190 if (context && context == current_class_type)
10191 /* In something like `struct S { enum E { i = 7 }; };' we put `i'
10192 on the TYPE_FIELDS list for `S'. (That's so that you can say
10193 things like `S::i' later.) */
10194 finish_member_declaration (decl);
10198 /* Add this enumeration constant to the list for this type. */
10199 TYPE_VALUES (enumtype) = tree_cons (name, decl, TYPE_VALUES (enumtype));
10203 /* We're defining DECL. Make sure that it's type is OK. */
10206 check_function_type (tree decl, tree current_function_parms)
10208 tree fntype = TREE_TYPE (decl);
10209 tree return_type = complete_type (TREE_TYPE (fntype));
10211 /* In a function definition, arg types must be complete. */
10212 require_complete_types_for_parms (current_function_parms);
10214 if (dependent_type_p (return_type))
10216 if (!COMPLETE_OR_VOID_TYPE_P (return_type))
10218 tree args = TYPE_ARG_TYPES (fntype);
10220 error ("return type %q#T is incomplete", return_type);
10222 /* Make it return void instead. */
10223 if (TREE_CODE (fntype) == METHOD_TYPE)
10224 fntype = build_method_type_directly (TREE_TYPE (TREE_VALUE (args)),
10226 TREE_CHAIN (args));
10228 fntype = build_function_type (void_type_node, args);
10230 = build_exception_variant (fntype,
10231 TYPE_RAISES_EXCEPTIONS (TREE_TYPE (decl)));
10234 abstract_virtuals_error (decl, TREE_TYPE (fntype));
10237 /* Create the FUNCTION_DECL for a function definition.
10238 DECLSPECS and DECLARATOR are the parts of the declaration;
10239 they describe the function's name and the type it returns,
10240 but twisted together in a fashion that parallels the syntax of C.
10242 FLAGS is a bitwise or of SF_PRE_PARSED (indicating that the
10243 DECLARATOR is really the DECL for the function we are about to
10244 process and that DECLSPECS should be ignored), SF_INCLASS_INLINE
10245 indicating that the function is an inline defined in-class.
10247 This function creates a binding context for the function body
10248 as well as setting up the FUNCTION_DECL in current_function_decl.
10250 For C++, we must first check whether that datum makes any sense.
10251 For example, "class A local_a(1,2);" means that variable local_a
10252 is an aggregate of type A, which should have a constructor
10253 applied to it with the argument list [1, 2]. */
10256 start_preparsed_function (tree decl1, tree attrs, int flags)
10258 tree ctype = NULL_TREE;
10261 int doing_friend = 0;
10262 struct cp_binding_level *bl;
10263 tree current_function_parms;
10264 struct c_fileinfo *finfo
10265 = get_fileinfo (lbasename (LOCATION_FILE (DECL_SOURCE_LOCATION (decl1))));
10266 bool honor_interface;
10268 /* Sanity check. */
10269 gcc_assert (TREE_CODE (TREE_VALUE (void_list_node)) == VOID_TYPE);
10270 gcc_assert (TREE_CHAIN (void_list_node) == NULL_TREE);
10272 fntype = TREE_TYPE (decl1);
10273 if (TREE_CODE (fntype) == METHOD_TYPE)
10274 ctype = TYPE_METHOD_BASETYPE (fntype);
10276 /* ISO C++ 11.4/5. A friend function defined in a class is in
10277 the (lexical) scope of the class in which it is defined. */
10278 if (!ctype && DECL_FRIEND_P (decl1))
10280 ctype = DECL_FRIEND_CONTEXT (decl1);
10282 /* CTYPE could be null here if we're dealing with a template;
10283 for example, `inline friend float foo()' inside a template
10284 will have no CTYPE set. */
10285 if (ctype && TREE_CODE (ctype) != RECORD_TYPE)
10291 if (DECL_DECLARED_INLINE_P (decl1)
10292 && lookup_attribute ("noinline", attrs))
10293 warning (0, "inline function %q+D given attribute noinline", decl1);
10295 if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (decl1))
10296 /* This is a constructor, we must ensure that any default args
10297 introduced by this definition are propagated to the clones
10298 now. The clones are used directly in overload resolution. */
10299 adjust_clone_args (decl1);
10301 /* Sometimes we don't notice that a function is a static member, and
10302 build a METHOD_TYPE for it. Fix that up now. */
10303 if (ctype != NULL_TREE && DECL_STATIC_FUNCTION_P (decl1)
10304 && TREE_CODE (TREE_TYPE (decl1)) == METHOD_TYPE)
10306 revert_static_member_fn (decl1);
10310 /* Set up current_class_type, and enter the scope of the class, if
10313 push_nested_class (ctype);
10314 else if (DECL_STATIC_FUNCTION_P (decl1))
10315 push_nested_class (DECL_CONTEXT (decl1));
10317 /* Now that we have entered the scope of the class, we must restore
10318 the bindings for any template parameters surrounding DECL1, if it
10319 is an inline member template. (Order is important; consider the
10320 case where a template parameter has the same name as a field of
10321 the class.) It is not until after this point that
10322 PROCESSING_TEMPLATE_DECL is guaranteed to be set up correctly. */
10323 if (flags & SF_INCLASS_INLINE)
10324 maybe_begin_member_template_processing (decl1);
10326 /* Effective C++ rule 15. */
10328 && DECL_OVERLOADED_OPERATOR_P (decl1) == NOP_EXPR
10329 && TREE_CODE (TREE_TYPE (fntype)) == VOID_TYPE)
10330 warning (OPT_Weffc__, "%<operator=%> should return a reference to %<*this%>");
10332 /* Make the init_value nonzero so pushdecl knows this is not tentative.
10333 error_mark_node is replaced below (in poplevel) with the BLOCK. */
10334 if (!DECL_INITIAL (decl1))
10335 DECL_INITIAL (decl1) = error_mark_node;
10337 /* This function exists in static storage.
10338 (This does not mean `static' in the C sense!) */
10339 TREE_STATIC (decl1) = 1;
10341 /* We must call push_template_decl after current_class_type is set
10342 up. (If we are processing inline definitions after exiting a
10343 class scope, current_class_type will be NULL_TREE until set above
10344 by push_nested_class.) */
10345 if (processing_template_decl)
10347 /* FIXME: Handle error_mark_node more gracefully. */
10348 tree newdecl1 = push_template_decl (decl1);
10349 if (newdecl1 != error_mark_node)
10353 /* We are now in the scope of the function being defined. */
10354 current_function_decl = decl1;
10356 /* Save the parm names or decls from this function's declarator
10357 where store_parm_decls will find them. */
10358 current_function_parms = DECL_ARGUMENTS (decl1);
10360 /* Make sure the parameter and return types are reasonable. When
10361 you declare a function, these types can be incomplete, but they
10362 must be complete when you define the function. */
10363 check_function_type (decl1, current_function_parms);
10364 /* Make sure no default arg is missing. */
10365 check_default_args (decl1);
10367 /* Build the return declaration for the function. */
10368 restype = TREE_TYPE (fntype);
10369 /* Promote the value to int before returning it. */
10370 if (c_promoting_integer_type_p (restype))
10371 restype = type_promotes_to (restype);
10372 if (DECL_RESULT (decl1) == NULL_TREE)
10376 resdecl = build_decl (RESULT_DECL, 0, TYPE_MAIN_VARIANT (restype));
10377 DECL_ARTIFICIAL (resdecl) = 1;
10378 DECL_IGNORED_P (resdecl) = 1;
10379 DECL_RESULT (decl1) = resdecl;
10381 cp_apply_type_quals_to_decl (cp_type_quals (restype), resdecl);
10384 /* Initialize RTL machinery. We cannot do this until
10385 CURRENT_FUNCTION_DECL and DECL_RESULT are set up. We do this
10386 even when processing a template; this is how we get
10387 CFUN set up, and our per-function variables initialized.
10388 FIXME factor out the non-RTL stuff. */
10389 bl = current_binding_level;
10390 allocate_struct_function (decl1);
10391 current_binding_level = bl;
10393 /* Even though we're inside a function body, we still don't want to
10394 call expand_expr to calculate the size of a variable-sized array.
10395 We haven't necessarily assigned RTL to all variables yet, so it's
10396 not safe to try to expand expressions involving them. */
10397 cfun->x_dont_save_pending_sizes_p = 1;
10399 /* Start the statement-tree, start the tree now. */
10400 DECL_SAVED_TREE (decl1) = push_stmt_list ();
10402 /* Let the user know we're compiling this function. */
10403 announce_function (decl1);
10405 /* Record the decl so that the function name is defined.
10406 If we already have a decl for this name, and it is a FUNCTION_DECL,
10407 use the old decl. */
10408 if (!processing_template_decl && !(flags & SF_PRE_PARSED))
10410 /* A specialization is not used to guide overload resolution. */
10411 if (!DECL_FUNCTION_MEMBER_P (decl1)
10412 && !(DECL_USE_TEMPLATE (decl1) &&
10413 PRIMARY_TEMPLATE_P (DECL_TI_TEMPLATE (decl1))))
10415 tree olddecl = pushdecl (decl1);
10417 if (olddecl == error_mark_node)
10418 /* If something went wrong when registering the declaration,
10419 use DECL1; we have to have a FUNCTION_DECL to use when
10420 parsing the body of the function. */
10423 /* Otherwise, OLDDECL is either a previous declaration of
10424 the same function or DECL1 itself. */
10429 /* We need to set the DECL_CONTEXT. */
10430 if (!DECL_CONTEXT (decl1) && DECL_TEMPLATE_INFO (decl1))
10431 DECL_CONTEXT (decl1) = DECL_CONTEXT (DECL_TI_TEMPLATE (decl1));
10433 fntype = TREE_TYPE (decl1);
10435 /* If #pragma weak applies, mark the decl appropriately now.
10436 The pragma only applies to global functions. Because
10437 determining whether or not the #pragma applies involves
10438 computing the mangled name for the declaration, we cannot
10439 apply the pragma until after we have merged this declaration
10440 with any previous declarations; if the original declaration
10441 has a linkage specification, that specification applies to
10442 the definition as well, and may affect the mangled name. */
10443 if (!DECL_CONTEXT (decl1))
10444 maybe_apply_pragma_weak (decl1);
10447 /* Reset these in case the call to pushdecl changed them. */
10448 current_function_decl = decl1;
10449 cfun->decl = decl1;
10451 /* If we are (erroneously) defining a function that we have already
10452 defined before, wipe out what we knew before. */
10453 if (!DECL_PENDING_INLINE_P (decl1))
10454 DECL_SAVED_FUNCTION_DATA (decl1) = NULL;
10456 if (ctype && !doing_friend && !DECL_STATIC_FUNCTION_P (decl1))
10458 /* We know that this was set up by `grokclassfn'. We do not
10459 wait until `store_parm_decls', since evil parse errors may
10460 never get us to that point. Here we keep the consistency
10461 between `current_class_type' and `current_class_ptr'. */
10462 tree t = DECL_ARGUMENTS (decl1);
10464 gcc_assert (t != NULL_TREE && TREE_CODE (t) == PARM_DECL);
10465 gcc_assert (TREE_CODE (TREE_TYPE (t)) == POINTER_TYPE);
10467 cp_function_chain->x_current_class_ref
10468 = build_indirect_ref (t, NULL);
10469 cp_function_chain->x_current_class_ptr = t;
10471 /* Constructors and destructors need to know whether they're "in
10472 charge" of initializing virtual base classes. */
10473 t = TREE_CHAIN (t);
10474 if (DECL_HAS_IN_CHARGE_PARM_P (decl1))
10476 current_in_charge_parm = t;
10477 t = TREE_CHAIN (t);
10479 if (DECL_HAS_VTT_PARM_P (decl1))
10481 gcc_assert (DECL_NAME (t) == vtt_parm_identifier);
10482 current_vtt_parm = t;
10486 honor_interface = (!DECL_TEMPLATE_INSTANTIATION (decl1)
10487 /* Implicitly-defined methods (like the
10488 destructor for a class in which no destructor
10489 is explicitly declared) must not be defined
10490 until their definition is needed. So, we
10491 ignore interface specifications for
10492 compiler-generated functions. */
10493 && !DECL_ARTIFICIAL (decl1));
10495 if (DECL_INTERFACE_KNOWN (decl1))
10497 tree ctx = decl_function_context (decl1);
10499 if (DECL_NOT_REALLY_EXTERN (decl1))
10500 DECL_EXTERNAL (decl1) = 0;
10502 if (ctx != NULL_TREE && DECL_DECLARED_INLINE_P (ctx)
10503 && TREE_PUBLIC (ctx))
10504 /* This is a function in a local class in an extern inline
10506 comdat_linkage (decl1);
10508 /* If this function belongs to an interface, it is public.
10509 If it belongs to someone else's interface, it is also external.
10510 This only affects inlines and template instantiations. */
10511 else if (!finfo->interface_unknown && honor_interface)
10513 if (DECL_DECLARED_INLINE_P (decl1)
10514 || DECL_TEMPLATE_INSTANTIATION (decl1)
10515 || processing_template_decl)
10517 DECL_EXTERNAL (decl1)
10518 = (finfo->interface_only
10519 || (DECL_DECLARED_INLINE_P (decl1)
10520 && ! flag_implement_inlines
10521 && !DECL_VINDEX (decl1)));
10523 /* For WIN32 we also want to put these in linkonce sections. */
10524 maybe_make_one_only (decl1);
10527 DECL_EXTERNAL (decl1) = 0;
10528 DECL_INTERFACE_KNOWN (decl1) = 1;
10529 /* If this function is in an interface implemented in this file,
10530 make sure that the backend knows to emit this function
10532 if (!DECL_EXTERNAL (decl1))
10533 mark_needed (decl1);
10535 else if (finfo->interface_unknown && finfo->interface_only
10536 && honor_interface)
10538 /* If MULTIPLE_SYMBOL_SPACES is defined and we saw a #pragma
10539 interface, we will have both finfo->interface_unknown and
10540 finfo->interface_only set. In that case, we don't want to
10541 use the normal heuristics because someone will supply a
10542 #pragma implementation elsewhere, and deducing it here would
10543 produce a conflict. */
10544 comdat_linkage (decl1);
10545 DECL_EXTERNAL (decl1) = 0;
10546 DECL_INTERFACE_KNOWN (decl1) = 1;
10547 DECL_DEFER_OUTPUT (decl1) = 1;
10551 /* This is a definition, not a reference.
10552 So clear DECL_EXTERNAL. */
10553 DECL_EXTERNAL (decl1) = 0;
10555 if ((DECL_DECLARED_INLINE_P (decl1)
10556 || DECL_TEMPLATE_INSTANTIATION (decl1))
10557 && ! DECL_INTERFACE_KNOWN (decl1)
10558 /* Don't try to defer nested functions for now. */
10559 && ! decl_function_context (decl1))
10560 DECL_DEFER_OUTPUT (decl1) = 1;
10562 DECL_INTERFACE_KNOWN (decl1) = 1;
10565 /* Determine the ELF visibility attribute for the function. We must not
10566 do this before calling "pushdecl", as we must allow "duplicate_decls"
10567 to merge any attributes appropriately. We also need to wait until
10569 if (!DECL_CLONED_FUNCTION_P (decl1))
10570 determine_visibility (decl1);
10572 begin_scope (sk_function_parms, decl1);
10576 if (DECL_DESTRUCTOR_P (decl1)
10577 || (DECL_CONSTRUCTOR_P (decl1)
10578 && targetm.cxx.cdtor_returns_this ()))
10580 cdtor_label = build_decl (LABEL_DECL, NULL_TREE, NULL_TREE);
10581 DECL_CONTEXT (cdtor_label) = current_function_decl;
10584 start_fname_decls ();
10586 store_parm_decls (current_function_parms);
10590 /* Like start_preparsed_function, except that instead of a
10591 FUNCTION_DECL, this function takes DECLSPECS and DECLARATOR.
10593 Returns 1 on success. If the DECLARATOR is not suitable for a function
10594 (it defines a datum instead), we return 0, which tells
10595 yyparse to report a parse error. */
10598 start_function (cp_decl_specifier_seq *declspecs,
10599 const cp_declarator *declarator,
10604 if (have_extern_spec)
10606 declspecs->storage_class = sc_extern;
10607 /* This should only be done once on the outermost decl. */
10608 have_extern_spec = false;
10611 decl1 = grokdeclarator (declarator, declspecs, FUNCDEF, 1, &attrs);
10612 /* If the declarator is not suitable for a function definition,
10613 cause a syntax error. */
10614 if (decl1 == NULL_TREE || TREE_CODE (decl1) != FUNCTION_DECL)
10617 if (DECL_MAIN_P (decl1))
10618 /* main must return int. grokfndecl should have corrected it
10619 (and issued a diagnostic) if the user got it wrong. */
10620 gcc_assert (same_type_p (TREE_TYPE (TREE_TYPE (decl1)),
10621 integer_type_node));
10623 start_preparsed_function (decl1, attrs, /*flags=*/SF_DEFAULT);
10628 /* Returns true iff an EH_SPEC_BLOCK should be created in the body of
10632 use_eh_spec_block (tree fn)
10634 return (flag_exceptions && flag_enforce_eh_specs
10635 && !processing_template_decl
10636 && TYPE_RAISES_EXCEPTIONS (TREE_TYPE (fn))
10637 /* We insert the EH_SPEC_BLOCK only in the original
10638 function; then, it is copied automatically to the
10640 && !DECL_CLONED_FUNCTION_P (fn)
10641 /* Implicitly-generated constructors and destructors have
10642 exception specifications. However, those specifications
10643 are the union of the possible exceptions specified by the
10644 constructors/destructors for bases and members, so no
10645 unallowed exception will ever reach this function. By
10646 not creating the EH_SPEC_BLOCK we save a little memory,
10647 and we avoid spurious warnings about unreachable
10649 && !DECL_ARTIFICIAL (fn));
10652 /* Store the parameter declarations into the current function declaration.
10653 This is called after parsing the parameter declarations, before
10654 digesting the body of the function.
10656 Also install to binding contour return value identifier, if any. */
10659 store_parm_decls (tree current_function_parms)
10661 tree fndecl = current_function_decl;
10664 /* This is a chain of any other decls that came in among the parm
10665 declarations. If a parm is declared with enum {foo, bar} x;
10666 then CONST_DECLs for foo and bar are put here. */
10667 tree nonparms = NULL_TREE;
10669 if (current_function_parms)
10671 /* This case is when the function was defined with an ANSI prototype.
10672 The parms already have decls, so we need not do anything here
10673 except record them as in effect
10674 and complain if any redundant old-style parm decls were written. */
10676 tree specparms = current_function_parms;
10679 /* Must clear this because it might contain TYPE_DECLs declared
10681 current_binding_level->names = NULL;
10683 /* If we're doing semantic analysis, then we'll call pushdecl
10684 for each of these. We must do them in reverse order so that
10685 they end in the correct forward order. */
10686 specparms = nreverse (specparms);
10688 for (parm = specparms; parm; parm = next)
10690 next = TREE_CHAIN (parm);
10691 if (TREE_CODE (parm) == PARM_DECL)
10693 if (DECL_NAME (parm) == NULL_TREE
10694 || TREE_CODE (parm) != VOID_TYPE)
10697 error ("parameter %qD declared void", parm);
10701 /* If we find an enum constant or a type tag,
10702 put it aside for the moment. */
10703 TREE_CHAIN (parm) = NULL_TREE;
10704 nonparms = chainon (nonparms, parm);
10708 /* Get the decls in their original chain order and record in the
10709 function. This is all and only the PARM_DECLs that were
10710 pushed into scope by the loop above. */
10711 DECL_ARGUMENTS (fndecl) = getdecls ();
10714 DECL_ARGUMENTS (fndecl) = NULL_TREE;
10716 /* Now store the final chain of decls for the arguments
10717 as the decl-chain of the current lexical scope.
10718 Put the enumerators in as well, at the front so that
10719 DECL_ARGUMENTS is not modified. */
10720 current_binding_level->names = chainon (nonparms, DECL_ARGUMENTS (fndecl));
10722 if (use_eh_spec_block (current_function_decl))
10723 current_eh_spec_block = begin_eh_spec_block ();
10727 /* We have finished doing semantic analysis on DECL, but have not yet
10728 generated RTL for its body. Save away our current state, so that
10729 when we want to generate RTL later we know what to do. */
10732 save_function_data (tree decl)
10734 struct language_function *f;
10736 /* Save the language-specific per-function data so that we can
10737 get it back when we really expand this function. */
10738 gcc_assert (!DECL_PENDING_INLINE_P (decl));
10741 f = GGC_NEW (struct language_function);
10742 memcpy (f, cp_function_chain, sizeof (struct language_function));
10743 DECL_SAVED_FUNCTION_DATA (decl) = f;
10745 /* Clear out the bits we don't need. */
10746 f->base.x_stmt_tree.x_cur_stmt_list = NULL_TREE;
10747 f->bindings = NULL;
10748 f->x_local_names = NULL;
10752 /* Set the return value of the constructor (if present). */
10755 finish_constructor_body (void)
10760 if (targetm.cxx.cdtor_returns_this ())
10762 /* Any return from a constructor will end up here. */
10763 add_stmt (build_stmt (LABEL_EXPR, cdtor_label));
10765 val = DECL_ARGUMENTS (current_function_decl);
10766 val = build2 (MODIFY_EXPR, TREE_TYPE (val),
10767 DECL_RESULT (current_function_decl), val);
10768 /* Return the address of the object. */
10769 exprstmt = build_stmt (RETURN_EXPR, val);
10770 add_stmt (exprstmt);
10774 /* Do all the processing for the beginning of a destructor; set up the
10775 vtable pointers and cleanups for bases and members. */
10778 begin_destructor_body (void)
10780 tree compound_stmt;
10782 /* If the CURRENT_CLASS_TYPE is incomplete, we will have already
10783 issued an error message. We still want to try to process the
10784 body of the function, but initialize_vtbl_ptrs will crash if
10785 TYPE_BINFO is NULL. */
10786 if (COMPLETE_TYPE_P (current_class_type))
10788 compound_stmt = begin_compound_stmt (0);
10789 /* Make all virtual function table pointers in non-virtual base
10790 classes point to CURRENT_CLASS_TYPE's virtual function
10792 initialize_vtbl_ptrs (current_class_ptr);
10793 finish_compound_stmt (compound_stmt);
10795 /* And insert cleanups for our bases and members so that they
10796 will be properly destroyed if we throw. */
10797 push_base_cleanups ();
10801 /* At the end of every destructor we generate code to delete the object if
10802 necessary. Do that now. */
10805 finish_destructor_body (void)
10809 /* Any return from a destructor will end up here; that way all base
10810 and member cleanups will be run when the function returns. */
10811 add_stmt (build_stmt (LABEL_EXPR, cdtor_label));
10813 /* In a virtual destructor, we must call delete. */
10814 if (DECL_VIRTUAL_P (current_function_decl))
10817 tree virtual_size = cxx_sizeof (current_class_type);
10821 At the point of definition of a virtual destructor (including
10822 an implicit definition), non-placement operator delete shall
10823 be looked up in the scope of the destructor's class and if
10824 found shall be accessible and unambiguous. */
10825 exprstmt = build_op_delete_call(DELETE_EXPR, current_class_ptr,
10827 /*global_p=*/false,
10828 /*placement=*/NULL_TREE,
10829 /*alloc_fn=*/NULL_TREE);
10831 if_stmt = begin_if_stmt ();
10832 finish_if_stmt_cond (build2 (BIT_AND_EXPR, integer_type_node,
10833 current_in_charge_parm,
10836 finish_expr_stmt (exprstmt);
10837 finish_then_clause (if_stmt);
10838 finish_if_stmt (if_stmt);
10841 if (targetm.cxx.cdtor_returns_this ())
10845 val = DECL_ARGUMENTS (current_function_decl);
10846 val = build2 (MODIFY_EXPR, TREE_TYPE (val),
10847 DECL_RESULT (current_function_decl), val);
10848 /* Return the address of the object. */
10849 exprstmt = build_stmt (RETURN_EXPR, val);
10850 add_stmt (exprstmt);
10854 /* Do the necessary processing for the beginning of a function body, which
10855 in this case includes member-initializers, but not the catch clauses of
10856 a function-try-block. Currently, this means opening a binding level
10857 for the member-initializers (in a ctor) and member cleanups (in a dtor). */
10860 begin_function_body (void)
10864 if (! FUNCTION_NEEDS_BODY_BLOCK (current_function_decl))
10867 if (processing_template_decl)
10868 /* Do nothing now. */;
10870 /* Always keep the BLOCK node associated with the outermost pair of
10871 curly braces of a function. These are needed for correct
10872 operation of dwarfout.c. */
10873 keep_next_level (true);
10875 stmt = begin_compound_stmt (BCS_FN_BODY);
10877 if (processing_template_decl)
10878 /* Do nothing now. */;
10879 else if (DECL_DESTRUCTOR_P (current_function_decl))
10880 begin_destructor_body ();
10885 /* Do the processing for the end of a function body. Currently, this means
10886 closing out the cleanups for fully-constructed bases and members, and in
10887 the case of the destructor, deleting the object if desired. Again, this
10888 is only meaningful for [cd]tors, since they are the only functions where
10889 there is a significant distinction between the main body and any
10890 function catch clauses. Handling, say, main() return semantics here
10891 would be wrong, as flowing off the end of a function catch clause for
10892 main() would also need to return 0. */
10895 finish_function_body (tree compstmt)
10897 if (compstmt == NULL_TREE)
10900 /* Close the block. */
10901 finish_compound_stmt (compstmt);
10903 if (processing_template_decl)
10904 /* Do nothing now. */;
10905 else if (DECL_CONSTRUCTOR_P (current_function_decl))
10906 finish_constructor_body ();
10907 else if (DECL_DESTRUCTOR_P (current_function_decl))
10908 finish_destructor_body ();
10911 /* Given a function, returns the BLOCK corresponding to the outermost level
10912 of curly braces, skipping the artificial block created for constructor
10916 outer_curly_brace_block (tree fndecl)
10918 tree block = BLOCK_SUBBLOCKS (DECL_INITIAL (fndecl));
10919 if (FUNCTION_NEEDS_BODY_BLOCK (current_function_decl))
10920 /* Skip the artificial function body block. */
10921 block = BLOCK_SUBBLOCKS (block);
10925 /* Finish up a function declaration and compile that function
10926 all the way to assembler language output. The free the storage
10927 for the function definition.
10929 FLAGS is a bitwise or of the following values:
10931 We just finished processing the body of an in-class inline
10932 function definition. (This processing will have taken place
10933 after the class definition is complete.) */
10936 finish_function (int flags)
10938 tree fndecl = current_function_decl;
10939 tree fntype, ctype = NULL_TREE;
10940 int inclass_inline = (flags & 2) != 0;
10943 /* When we get some parse errors, we can end up without a
10944 current_function_decl, so cope. */
10945 if (fndecl == NULL_TREE)
10946 return error_mark_node;
10948 if (DECL_NONSTATIC_MEMBER_FUNCTION_P (fndecl)
10949 && DECL_VIRTUAL_P (fndecl)
10950 && !processing_template_decl)
10952 tree fnclass = DECL_CONTEXT (fndecl);
10953 if (fndecl == CLASSTYPE_KEY_METHOD (fnclass))
10954 keyed_classes = tree_cons (NULL_TREE, fnclass, keyed_classes);
10957 nested = function_depth > 1;
10958 fntype = TREE_TYPE (fndecl);
10960 /* TREE_READONLY (fndecl) = 1;
10961 This caused &foo to be of type ptr-to-const-function
10962 which then got a warning when stored in a ptr-to-function variable. */
10964 gcc_assert (building_stmt_tree ());
10966 /* For a cloned function, we've already got all the code we need;
10967 there's no need to add any extra bits. */
10968 if (!DECL_CLONED_FUNCTION_P (fndecl))
10970 if (DECL_MAIN_P (current_function_decl))
10974 /* Make it so that `main' always returns 0 by default (or
10977 stmt = finish_return_stmt (integer_one_node);
10979 stmt = finish_return_stmt (integer_zero_node);
10981 /* Hack. We don't want the middle-end to warn that this
10982 return is unreachable, so put the statement on the
10984 #ifdef USE_MAPPED_LOCATION
10985 SET_EXPR_LOCATION (stmt, UNKNOWN_LOCATION);
10987 annotate_with_file_line (stmt, input_filename, 0);
10991 if (use_eh_spec_block (current_function_decl))
10992 finish_eh_spec_block (TYPE_RAISES_EXCEPTIONS
10993 (TREE_TYPE (current_function_decl)),
10994 current_eh_spec_block);
10997 /* If we're saving up tree structure, tie off the function now. */
10998 DECL_SAVED_TREE (fndecl) = pop_stmt_list (DECL_SAVED_TREE (fndecl));
11000 finish_fname_decls ();
11002 /* If this function can't throw any exceptions, remember that. */
11003 if (!processing_template_decl
11004 && !cp_function_chain->can_throw
11005 && !flag_non_call_exceptions)
11006 TREE_NOTHROW (fndecl) = 1;
11008 /* This must come after expand_function_end because cleanups might
11009 have declarations (from inline functions) that need to go into
11010 this function's blocks. */
11012 /* If the current binding level isn't the outermost binding level
11013 for this function, either there is a bug, or we have experienced
11014 syntax errors and the statement tree is malformed. */
11015 if (current_binding_level->kind != sk_function_parms)
11017 /* Make sure we have already experienced errors. */
11018 gcc_assert (errorcount);
11020 /* Throw away the broken statement tree and extra binding
11022 DECL_SAVED_TREE (fndecl) = alloc_stmt_list ();
11024 while (current_binding_level->kind != sk_function_parms)
11026 if (current_binding_level->kind == sk_class)
11027 pop_nested_class ();
11029 poplevel (0, 0, 0);
11032 poplevel (1, 0, 1);
11034 /* Statements should always be full-expressions at the outermost set
11035 of curly braces for a function. */
11036 gcc_assert (stmts_are_full_exprs_p ());
11038 /* Set up the named return value optimization, if we can. Candidate
11039 variables are selected in check_return_value. */
11040 if (current_function_return_value)
11042 tree r = current_function_return_value;
11045 if (r != error_mark_node
11046 /* This is only worth doing for fns that return in memory--and
11047 simpler, since we don't have to worry about promoted modes. */
11048 && aggregate_value_p (TREE_TYPE (TREE_TYPE (fndecl)), fndecl)
11049 /* Only allow this for variables declared in the outer scope of
11050 the function so we know that their lifetime always ends with a
11051 return; see g++.dg/opt/nrv6.C. We could be more flexible if
11052 we were to do this optimization in tree-ssa. */
11053 && (outer = outer_curly_brace_block (fndecl))
11054 && chain_member (r, BLOCK_VARS (outer)))
11055 finalize_nrv (&DECL_SAVED_TREE (fndecl), r, DECL_RESULT (fndecl));
11057 current_function_return_value = NULL_TREE;
11060 /* Remember that we were in class scope. */
11061 if (current_class_name)
11062 ctype = current_class_type;
11064 /* Must mark the RESULT_DECL as being in this function. */
11065 DECL_CONTEXT (DECL_RESULT (fndecl)) = fndecl;
11067 /* Set the BLOCK_SUPERCONTEXT of the outermost function scope to point
11068 to the FUNCTION_DECL node itself. */
11069 BLOCK_SUPERCONTEXT (DECL_INITIAL (fndecl)) = fndecl;
11071 /* Save away current state, if appropriate. */
11072 if (!processing_template_decl)
11073 save_function_data (fndecl);
11075 /* Complain if there's just no return statement. */
11076 if (warn_return_type
11077 && TREE_CODE (TREE_TYPE (fntype)) != VOID_TYPE
11078 && !dependent_type_p (TREE_TYPE (fntype))
11079 && !current_function_returns_value && !current_function_returns_null
11080 /* Don't complain if we abort or throw. */
11081 && !current_function_returns_abnormally
11082 && !DECL_NAME (DECL_RESULT (fndecl))
11083 /* Normally, with -Wreturn-type, flow will complain. Unless we're an
11084 inline function, as we might never be compiled separately. */
11085 && (DECL_INLINE (fndecl) || processing_template_decl)
11086 /* Structor return values (if any) are set by the compiler. */
11087 && !DECL_CONSTRUCTOR_P (fndecl)
11088 && !DECL_DESTRUCTOR_P (fndecl))
11089 warning (OPT_Wreturn_type, "no return statement in function returning non-void");
11091 /* Store the end of the function, so that we get good line number
11092 info for the epilogue. */
11093 cfun->function_end_locus = input_location;
11095 /* Genericize before inlining. */
11096 if (!processing_template_decl)
11098 struct language_function *f = DECL_SAVED_FUNCTION_DATA (fndecl);
11099 cp_genericize (fndecl);
11100 /* Clear out the bits we don't need. */
11101 f->x_current_class_ptr = NULL;
11102 f->x_current_class_ref = NULL;
11103 f->x_eh_spec_block = NULL;
11104 f->x_in_charge_parm = NULL;
11105 f->x_vtt_parm = NULL;
11106 f->x_return_value = NULL;
11107 f->bindings = NULL;
11109 /* Handle attribute((warn_unused_result)). Relies on gimple input. */
11110 c_warn_unused_result (&DECL_SAVED_TREE (fndecl));
11112 /* Clear out the bits we don't need. */
11113 local_names = NULL;
11115 /* We're leaving the context of this function, so zap cfun. It's still in
11116 DECL_STRUCT_FUNCTION, and we'll restore it in tree_rest_of_compilation. */
11118 current_function_decl = NULL;
11120 /* If this is an in-class inline definition, we may have to pop the
11121 bindings for the template parameters that we added in
11122 maybe_begin_member_template_processing when start_function was
11124 if (inclass_inline)
11125 maybe_end_member_template_processing ();
11127 /* Leave the scope of the class. */
11129 pop_nested_class ();
11135 /* Let the error reporting routines know that we're outside a
11136 function. For a nested function, this value is used in
11137 cxx_pop_function_context and then reset via pop_function_context. */
11138 current_function_decl = NULL_TREE;
11143 /* Create the FUNCTION_DECL for a function definition.
11144 DECLSPECS and DECLARATOR are the parts of the declaration;
11145 they describe the return type and the name of the function,
11146 but twisted together in a fashion that parallels the syntax of C.
11148 This function creates a binding context for the function body
11149 as well as setting up the FUNCTION_DECL in current_function_decl.
11151 Returns a FUNCTION_DECL on success.
11153 If the DECLARATOR is not suitable for a function (it defines a datum
11154 instead), we return 0, which tells yyparse to report a parse error.
11156 May return void_type_node indicating that this method is actually
11157 a friend. See grokfield for more details.
11159 Came here with a `.pushlevel' .
11161 DO NOT MAKE ANY CHANGES TO THIS CODE WITHOUT MAKING CORRESPONDING
11162 CHANGES TO CODE IN `grokfield'. */
11165 start_method (cp_decl_specifier_seq *declspecs,
11166 const cp_declarator *declarator, tree attrlist)
11168 tree fndecl = grokdeclarator (declarator, declspecs, MEMFUNCDEF, 0,
11171 if (fndecl == error_mark_node)
11172 return error_mark_node;
11174 if (fndecl == NULL || TREE_CODE (fndecl) != FUNCTION_DECL)
11176 error ("invalid member function declaration");
11177 return error_mark_node;
11181 cplus_decl_attributes (&fndecl, attrlist, 0);
11183 /* Pass friends other than inline friend functions back. */
11184 if (fndecl == void_type_node)
11187 if (DECL_IN_AGGR_P (fndecl))
11189 if (DECL_CONTEXT (fndecl)
11190 && TREE_CODE (DECL_CONTEXT (fndecl)) != NAMESPACE_DECL)
11191 error ("%qD is already defined in class %qT", fndecl,
11192 DECL_CONTEXT (fndecl));
11193 return error_mark_node;
11196 check_template_shadow (fndecl);
11198 DECL_DECLARED_INLINE_P (fndecl) = 1;
11199 if (flag_default_inline)
11200 DECL_INLINE (fndecl) = 1;
11202 /* We process method specializations in finish_struct_1. */
11203 if (processing_template_decl && !DECL_TEMPLATE_SPECIALIZATION (fndecl))
11205 fndecl = push_template_decl (fndecl);
11206 if (fndecl == error_mark_node)
11210 if (! DECL_FRIEND_P (fndecl))
11212 if (TREE_CHAIN (fndecl))
11214 fndecl = copy_node (fndecl);
11215 TREE_CHAIN (fndecl) = NULL_TREE;
11219 finish_decl (fndecl, NULL_TREE, NULL_TREE);
11221 /* Make a place for the parms. */
11222 begin_scope (sk_function_parms, fndecl);
11224 DECL_IN_AGGR_P (fndecl) = 1;
11228 /* Go through the motions of finishing a function definition.
11229 We don't compile this method until after the whole class has
11232 FINISH_METHOD must return something that looks as though it
11233 came from GROKFIELD (since we are defining a method, after all).
11235 This is called after parsing the body of the function definition.
11236 STMTS is the chain of statements that makes up the function body.
11238 DECL is the ..._DECL that `start_method' provided. */
11241 finish_method (tree decl)
11243 tree fndecl = decl;
11248 if (decl == void_type_node)
11251 old_initial = DECL_INITIAL (fndecl);
11253 /* Undo the level for the parms (from start_method).
11254 This is like poplevel, but it causes nothing to be
11255 saved. Saving information here confuses symbol-table
11256 output routines. Besides, this information will
11257 be correctly output when this method is actually
11260 /* Clear out the meanings of the local variables of this level;
11261 also record in each decl which block it belongs to. */
11263 for (link = current_binding_level->names; link; link = TREE_CHAIN (link))
11265 if (DECL_NAME (link) != NULL_TREE)
11266 pop_binding (DECL_NAME (link), link);
11267 gcc_assert (TREE_CODE (link) != FUNCTION_DECL);
11268 DECL_CONTEXT (link) = NULL_TREE;
11271 poplevel (0, 0, 0);
11273 DECL_INITIAL (fndecl) = old_initial;
11275 /* We used to check if the context of FNDECL was different from
11276 current_class_type as another way to get inside here. This didn't work
11277 for String.cc in libg++. */
11278 if (DECL_FRIEND_P (fndecl))
11280 VEC_safe_push (tree, gc, CLASSTYPE_INLINE_FRIENDS (current_class_type),
11282 decl = void_type_node;
11289 /* VAR is a VAR_DECL. If its type is incomplete, remember VAR so that
11290 we can lay it out later, when and if its type becomes complete. */
11293 maybe_register_incomplete_var (tree var)
11295 gcc_assert (TREE_CODE (var) == VAR_DECL);
11297 /* Keep track of variables with incomplete types. */
11298 if (!processing_template_decl && TREE_TYPE (var) != error_mark_node
11299 && DECL_EXTERNAL (var))
11301 tree inner_type = TREE_TYPE (var);
11303 while (TREE_CODE (inner_type) == ARRAY_TYPE)
11304 inner_type = TREE_TYPE (inner_type);
11305 inner_type = TYPE_MAIN_VARIANT (inner_type);
11307 if ((!COMPLETE_TYPE_P (inner_type) && CLASS_TYPE_P (inner_type))
11308 /* RTTI TD entries are created while defining the type_info. */
11309 || (TYPE_LANG_SPECIFIC (inner_type)
11310 && TYPE_BEING_DEFINED (inner_type)))
11311 incomplete_vars = tree_cons (inner_type, var, incomplete_vars);
11315 /* Called when a class type (given by TYPE) is defined. If there are
11316 any existing VAR_DECLs whose type hsa been completed by this
11317 declaration, update them now. */
11320 complete_vars (tree type)
11322 tree *list = &incomplete_vars;
11324 gcc_assert (CLASS_TYPE_P (type));
11327 if (same_type_p (type, TREE_PURPOSE (*list)))
11329 tree var = TREE_VALUE (*list);
11330 tree type = TREE_TYPE (var);
11331 /* Complete the type of the variable. The VAR_DECL itself
11332 will be laid out in expand_expr. */
11333 complete_type (type);
11334 cp_apply_type_quals_to_decl (cp_type_quals (type), var);
11335 /* Remove this entry from the list. */
11336 *list = TREE_CHAIN (*list);
11339 list = &TREE_CHAIN (*list);
11342 /* Check for pending declarations which may have abstract type. */
11343 complete_type_check_abstract (type);
11346 /* If DECL is of a type which needs a cleanup, build that cleanup
11350 cxx_maybe_build_cleanup (tree decl)
11352 tree type = TREE_TYPE (decl);
11354 if (type != error_mark_node && TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type))
11356 int flags = LOOKUP_NORMAL|LOOKUP_DESTRUCTOR;
11358 bool has_vbases = (TREE_CODE (type) == RECORD_TYPE
11359 && CLASSTYPE_VBASECLASSES (type));
11361 if (TREE_CODE (type) == ARRAY_TYPE)
11365 cxx_mark_addressable (decl);
11366 rval = build_unary_op (ADDR_EXPR, decl, 0);
11369 /* Optimize for space over speed here. */
11370 if (!has_vbases || flag_expensive_optimizations)
11371 flags |= LOOKUP_NONVIRTUAL;
11373 rval = build_delete (TREE_TYPE (rval), rval,
11374 sfk_complete_destructor, flags, 0);
11381 /* When a stmt has been parsed, this function is called. */
11388 /* DECL was originally constructed as a non-static member function,
11389 but turned out to be static. Update it accordingly. */
11392 revert_static_member_fn (tree decl)
11395 tree function = TREE_TYPE (decl);
11396 tree args = TYPE_ARG_TYPES (function);
11398 if (cp_type_quals (TREE_TYPE (TREE_VALUE (args)))
11399 != TYPE_UNQUALIFIED)
11400 error ("static member function %q#D declared with type qualifiers", decl);
11402 args = TREE_CHAIN (args);
11403 tmp = build_function_type (TREE_TYPE (function), args);
11404 tmp = build_qualified_type (tmp, cp_type_quals (function));
11405 tmp = build_exception_variant (tmp,
11406 TYPE_RAISES_EXCEPTIONS (function));
11407 TREE_TYPE (decl) = tmp;
11408 if (DECL_ARGUMENTS (decl))
11409 DECL_ARGUMENTS (decl) = TREE_CHAIN (DECL_ARGUMENTS (decl));
11410 DECL_STATIC_FUNCTION_P (decl) = 1;
11413 /* Initialize the variables used during compilation of a C++
11417 cxx_push_function_context (struct function * f)
11419 struct language_function *p = GGC_CNEW (struct language_function);
11422 /* Whenever we start a new function, we destroy temporaries in the
11424 current_stmt_tree ()->stmts_are_full_exprs_p = 1;
11430 if (DECL_SAVED_FUNCTION_DATA (fn))
11432 /* If we already parsed this function, and we're just expanding it
11433 now, restore saved state. */
11434 *cp_function_chain = *DECL_SAVED_FUNCTION_DATA (fn);
11436 /* We don't need the saved data anymore. Unless this is an inline
11437 function; we need the named return value info for
11438 declare_return_variable. */
11439 if (! DECL_INLINE (fn))
11440 DECL_SAVED_FUNCTION_DATA (fn) = NULL;
11445 /* Free the language-specific parts of F, now that we've finished
11446 compiling the function. */
11449 cxx_pop_function_context (struct function * f)
11454 /* Return which tree structure is used by T, or TS_CP_GENERIC if T is
11455 one of the language-independent trees. */
11457 enum cp_tree_node_structure_enum
11458 cp_tree_node_structure (union lang_tree_node * t)
11460 switch (TREE_CODE (&t->generic))
11462 case DEFAULT_ARG: return TS_CP_DEFAULT_ARG;
11463 case IDENTIFIER_NODE: return TS_CP_IDENTIFIER;
11464 case OVERLOAD: return TS_CP_OVERLOAD;
11465 case TEMPLATE_PARM_INDEX: return TS_CP_TPI;
11466 case TINST_LEVEL: return TS_CP_TINST_LEVEL;
11467 case PTRMEM_CST: return TS_CP_PTRMEM;
11468 case BASELINK: return TS_CP_BASELINK;
11469 default: return TS_CP_GENERIC;
11473 /* Build the void_list_node (void_type_node having been created). */
11475 build_void_list_node (void)
11477 tree t = build_tree_list (NULL_TREE, void_type_node);
11482 cp_missing_noreturn_ok_p (tree decl)
11484 /* A missing noreturn is ok for the `main' function. */
11485 return DECL_MAIN_P (decl);
11488 /* Return the COMDAT group into which DECL should be placed. */
11491 cxx_comdat_group (tree decl)
11495 /* Virtual tables, construction virtual tables, and virtual table
11496 tables all go in a single COMDAT group, named after the primary
11498 if (TREE_CODE (decl) == VAR_DECL && DECL_VTABLE_OR_VTT_P (decl))
11499 name = DECL_ASSEMBLER_NAME (CLASSTYPE_VTABLES (DECL_CONTEXT (decl)));
11500 /* For all other DECLs, the COMDAT group is the mangled name of the
11501 declaration itself. */
11504 while (DECL_THUNK_P (decl))
11506 /* If TARGET_USE_LOCAL_THUNK_ALIAS_P, use_thunk puts the thunk
11507 into the same section as the target function. In that case
11508 we must return target's name. */
11509 tree target = THUNK_TARGET (decl);
11510 if (TARGET_USE_LOCAL_THUNK_ALIAS_P (target)
11511 && DECL_SECTION_NAME (target) != NULL
11512 && DECL_ONE_ONLY (target))
11517 name = DECL_ASSEMBLER_NAME (decl);
11520 return IDENTIFIER_POINTER (name);
11523 #include "gt-cp-decl.h"