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 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, 59 Temple Place - Suite 330,
21 Boston, MA 02111-1307, 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 grokfndecl (tree, tree, tree, tree, tree, int,
65 enum overload_flags, cp_cv_quals,
66 tree, int, int, int, int, int, int, tree,
68 static tree grokvardecl (tree, tree, const cp_decl_specifier_seq *,
70 static void record_unknown_type (tree, const char *);
71 static tree builtin_function_1 (const char *, tree, tree,
72 enum built_in_function code,
73 enum built_in_class cl, const char *,
75 static tree build_library_fn_1 (tree, enum tree_code, tree);
76 static int member_function_or_else (tree, tree, enum overload_flags);
77 static void bad_specifiers (tree, const char *, int, int, int, int,
79 static void check_for_uninitialized_const_var (tree);
80 static hashval_t typename_hash (const void *);
81 static int typename_compare (const void *, const void *);
82 static tree local_variable_p_walkfn (tree *, int *, void *);
83 static tree record_builtin_java_type (const char *, int);
84 static const char *tag_name (enum tag_types);
85 static tree lookup_and_check_tag (enum tag_types, tree, tag_scope, bool);
86 static int walk_namespaces_r (tree, walk_namespaces_fn, void *);
87 static int walk_globals_r (tree, void*);
88 static int walk_vtables_r (tree, void*);
89 static tree make_label_decl (tree, int);
90 static void use_label (tree);
91 static void check_previous_goto_1 (tree, struct cp_binding_level *, tree,
93 static void check_previous_goto (struct named_label_use_list *);
94 static void check_switch_goto (struct cp_binding_level *);
95 static void check_previous_gotos (tree);
96 static void pop_label (tree, tree);
97 static void pop_labels (tree);
98 static void maybe_deduce_size_from_array_init (tree, tree);
99 static void layout_var_decl (tree);
100 static void maybe_commonize_var (tree);
101 static tree check_initializer (tree, tree, int, tree *);
102 static void make_rtl_for_nonlocal_decl (tree, tree, const char *);
103 static void save_function_data (tree);
104 static void check_function_type (tree, tree);
105 static void finish_constructor_body (void);
106 static void begin_destructor_body (void);
107 static void finish_destructor_body (void);
108 static tree create_array_type_for_decl (tree, tree, tree);
109 static tree get_atexit_node (void);
110 static tree get_dso_handle_node (void);
111 static tree start_cleanup_fn (void);
112 static void end_cleanup_fn (void);
113 static tree cp_make_fname_decl (tree, int);
114 static void initialize_predefined_identifiers (void);
115 static tree check_special_function_return_type
116 (special_function_kind, tree, tree);
117 static tree push_cp_library_fn (enum tree_code, tree);
118 static tree build_cp_library_fn (tree, enum tree_code, tree);
119 static void store_parm_decls (tree);
120 static void initialize_local_var (tree, tree);
121 static void expand_static_init (tree, tree);
122 static tree next_initializable_field (tree);
123 static tree reshape_init (tree, tree *);
125 /* Erroneous argument lists can use this *IFF* they do not modify it. */
126 tree error_mark_list;
128 /* The following symbols are subsumed in the cp_global_trees array, and
129 listed here individually for documentation purposes.
132 tree wchar_decl_node;
134 tree vtable_entry_type;
135 tree delta_type_node;
136 tree __t_desc_type_node;
137 tree ti_desc_type_node;
138 tree bltn_desc_type_node, ptr_desc_type_node;
139 tree ary_desc_type_node, func_desc_type_node, enum_desc_type_node;
140 tree class_desc_type_node, si_class_desc_type_node, vmi_class_desc_type_node;
141 tree ptm_desc_type_node;
142 tree base_desc_type_node;
144 tree class_type_node;
145 tree unknown_type_node;
147 Array type `vtable_entry_type[]'
150 tree vtbl_ptr_type_node;
157 A FUNCTION_DECL which can call `abort'. Not necessarily the
158 one that the user will declare, but sufficient to be called
159 by routines that want to abort the program.
163 The FUNCTION_DECL for the default `::operator delete'.
165 tree global_delete_fndecl;
168 tree type_info_type_node, tinfo_decl_id, tinfo_decl_type;
173 tree cp_global_trees[CPTI_MAX];
175 /* Indicates that there is a type value in some namespace, although
176 that is not necessarily in scope at the moment. */
178 tree global_type_node;
180 /* The node that holds the "name" of the global scope. */
181 tree global_scope_name;
183 /* Used only for jumps to as-yet undefined labels, since jumps to
184 defined labels can have their validity checked immediately. */
186 struct named_label_use_list GTY(())
188 struct cp_binding_level *binding_level;
191 location_t o_goto_locus;
192 struct named_label_use_list *next;
195 #define named_label_uses cp_function_chain->x_named_label_uses
197 #define local_names cp_function_chain->x_local_names
199 /* A list of objects which have constructors or destructors
200 which reside in the global scope. The decl is stored in
201 the TREE_VALUE slot and the initializer is stored
202 in the TREE_PURPOSE slot. */
203 tree static_aggregates;
207 /* A node for the integer constants 2, and 3. */
209 tree integer_two_node, integer_three_node;
211 /* A list of all LABEL_DECLs in the function that have names. Here so
212 we can clear out their names' definitions at the end of the
213 function, and so we can check the validity of jumps to these labels. */
215 struct named_label_list GTY(())
217 struct cp_binding_level *binding_level;
222 struct named_label_list *next;
223 unsigned int in_try_scope : 1;
224 unsigned int in_catch_scope : 1;
227 #define named_labels cp_function_chain->x_named_labels
229 /* The number of function bodies which we are currently processing.
230 (Zero if we are at namespace scope, one inside the body of a
231 function, two inside the body of a function in a local class, etc.) */
234 /* States indicating how grokdeclarator() should handle declspecs marked
235 with __attribute__((deprecated)). An object declared as
236 __attribute__((deprecated)) suppresses warnings of uses of other
239 enum deprecated_states {
244 static enum deprecated_states deprecated_state = DEPRECATED_NORMAL;
246 /* True if a declaration with an `extern' linkage specifier is being
248 bool have_extern_spec;
251 /* A TREE_LIST of VAR_DECLs. The TREE_PURPOSE is a RECORD_TYPE or
252 UNION_TYPE; the TREE_VALUE is a VAR_DECL with that type. At the
253 time the VAR_DECL was declared, the type was incomplete. */
255 static GTY(()) tree incomplete_vars;
257 /* Returns the kind of template specialization we are currently
258 processing, given that it's declaration contained N_CLASS_SCOPES
259 explicit scope qualifications. */
262 current_tmpl_spec_kind (int n_class_scopes)
264 int n_template_parm_scopes = 0;
265 int seen_specialization_p = 0;
266 int innermost_specialization_p = 0;
267 struct cp_binding_level *b;
269 /* Scan through the template parameter scopes. */
270 for (b = current_binding_level;
271 b->kind == sk_template_parms;
274 /* If we see a specialization scope inside a parameter scope,
275 then something is wrong. That corresponds to a declaration
278 template <class T> template <> ...
280 which is always invalid since [temp.expl.spec] forbids the
281 specialization of a class member template if the enclosing
282 class templates are not explicitly specialized as well. */
283 if (b->explicit_spec_p)
285 if (n_template_parm_scopes == 0)
286 innermost_specialization_p = 1;
288 seen_specialization_p = 1;
290 else if (seen_specialization_p == 1)
291 return tsk_invalid_member_spec;
293 ++n_template_parm_scopes;
296 /* Handle explicit instantiations. */
297 if (processing_explicit_instantiation)
299 if (n_template_parm_scopes != 0)
300 /* We've seen a template parameter list during an explicit
301 instantiation. For example:
303 template <class T> template void f(int);
305 This is erroneous. */
306 return tsk_invalid_expl_inst;
308 return tsk_expl_inst;
311 if (n_template_parm_scopes < n_class_scopes)
312 /* We've not seen enough template headers to match all the
313 specialized classes present. For example:
315 template <class T> void R<T>::S<T>::f(int);
317 This is invalid; there needs to be one set of template
318 parameters for each class. */
319 return tsk_insufficient_parms;
320 else if (n_template_parm_scopes == n_class_scopes)
321 /* We're processing a non-template declaration (even though it may
322 be a member of a template class.) For example:
324 template <class T> void S<T>::f(int);
326 The `class T' maches the `S<T>', leaving no template headers
327 corresponding to the `f'. */
329 else if (n_template_parm_scopes > n_class_scopes + 1)
330 /* We've got too many template headers. For example:
332 template <> template <class T> void f (T);
334 There need to be more enclosing classes. */
335 return tsk_excessive_parms;
337 /* This must be a template. It's of the form:
339 template <class T> template <class U> void S<T>::f(U);
341 This is a specialization if the innermost level was a
342 specialization; otherwise it's just a definition of the
344 return innermost_specialization_p ? tsk_expl_spec : tsk_template;
347 /* Exit the current scope. */
355 /* When a label goes out of scope, check to see if that label was used
356 in a valid manner, and issue any appropriate warnings or errors. */
359 pop_label (tree label, tree old_value)
361 if (!processing_template_decl)
363 if (DECL_INITIAL (label) == NULL_TREE)
367 cp_error_at ("label %qD used but not defined", label);
368 #ifdef USE_MAPPED_LOCATION
369 location = input_location; /* FIXME want (input_filename, (line)0) */
371 location.file = input_filename;
374 /* Avoid crashing later. */
375 define_label (location, DECL_NAME (label));
377 else if (warn_unused_label && !TREE_USED (label))
378 cp_warning_at ("label %qD defined but not used", label);
381 SET_IDENTIFIER_LABEL_VALUE (DECL_NAME (label), old_value);
384 /* At the end of a function, all labels declared within the function
385 go out of scope. BLOCK is the top-level block for the
389 pop_labels (tree block)
391 struct named_label_list *link;
393 /* Clear out the definitions of all label names, since their scopes
395 for (link = named_labels; link; link = link->next)
397 pop_label (link->label_decl, link->old_value);
398 /* Put the labels into the "variables" of the top-level block,
399 so debugger can see them. */
400 TREE_CHAIN (link->label_decl) = BLOCK_VARS (block);
401 BLOCK_VARS (block) = link->label_decl;
407 /* The following two routines are used to interface to Objective-C++.
408 The binding level is purposely treated as an opaque type. */
411 objc_get_current_scope (void)
413 return current_binding_level;
416 /* The following routine is used by the NeXT-style SJLJ exceptions;
417 variables get marked 'volatile' so as to not be clobbered by
418 _setjmp()/_longjmp() calls. All variables in the current scope,
419 as well as parent scopes up to (but not including) ENCLOSING_BLK
420 shall be thusly marked. */
423 objc_mark_locals_volatile (void *enclosing_blk)
425 struct cp_binding_level *scope;
427 for (scope = current_binding_level;
428 scope && scope != enclosing_blk && scope->kind == sk_block;
429 scope = scope->level_chain)
433 for (decl = scope->names; decl; decl = TREE_CHAIN (decl))
435 if (TREE_CODE (decl) == VAR_DECL)
437 DECL_REGISTER (decl) = 0;
438 TREE_THIS_VOLATILE (decl) = 1;
444 /* Exit a binding level.
445 Pop the level off, and restore the state of the identifier-decl mappings
446 that were in effect when this level was entered.
448 If KEEP == 1, this level had explicit declarations, so
449 and create a "block" (a BLOCK node) for the level
450 to record its declarations and subblocks for symbol table output.
452 If FUNCTIONBODY is nonzero, this level is the body of a function,
453 so create a block as if KEEP were set and also clear out all
456 If REVERSE is nonzero, reverse the order of decls before putting
457 them into the BLOCK. */
460 poplevel (int keep, int reverse, int functionbody)
463 /* The chain of decls was accumulated in reverse order.
464 Put it into forward order, just for cleanliness. */
466 int tmp = functionbody;
467 int real_functionbody;
471 int leaving_for_scope;
474 timevar_push (TV_NAME_LOOKUP);
479 gcc_assert (current_binding_level->kind != sk_class);
481 real_functionbody = (current_binding_level->kind == sk_cleanup
482 ? ((functionbody = 0), tmp) : functionbody);
483 subblocks = functionbody >= 0 ? current_binding_level->blocks : 0;
485 gcc_assert (!VEC_length(cp_class_binding,
486 current_binding_level->class_shadowed));
488 /* We used to use KEEP == 2 to indicate that the new block should go
489 at the beginning of the list of blocks at this binding level,
490 rather than the end. This hack is no longer used. */
491 gcc_assert (keep == 0 || keep == 1);
493 if (current_binding_level->keep)
496 /* Any uses of undefined labels, and any defined labels, now operate
497 under constraints of next binding contour. */
498 if (cfun && !functionbody)
500 struct cp_binding_level *level_chain;
501 level_chain = current_binding_level->level_chain;
504 struct named_label_use_list *uses;
505 struct named_label_list *labels;
506 for (labels = named_labels; labels; labels = labels->next)
507 if (labels->binding_level == current_binding_level)
510 if (current_binding_level->kind == sk_try)
511 labels->in_try_scope = 1;
512 if (current_binding_level->kind == sk_catch)
513 labels->in_catch_scope = 1;
514 for (decl = labels->names_in_scope; decl;
515 decl = TREE_CHAIN (decl))
516 if (decl_jump_unsafe (decl))
517 labels->bad_decls = tree_cons (NULL_TREE, decl,
519 labels->binding_level = level_chain;
520 labels->names_in_scope = level_chain->names;
523 for (uses = named_label_uses; uses; uses = uses->next)
524 if (uses->binding_level == current_binding_level)
526 uses->binding_level = level_chain;
527 uses->names_in_scope = level_chain->names;
532 /* Get the decls in the order they were written.
533 Usually current_binding_level->names is in reverse order.
534 But parameter decls were previously put in forward order. */
537 current_binding_level->names
538 = decls = nreverse (current_binding_level->names);
540 decls = current_binding_level->names;
542 /* If there were any declarations or structure tags in that level,
543 or if this level is a function body,
544 create a BLOCK to record them for the life of this function. */
546 if (keep == 1 || functionbody)
547 block = make_node (BLOCK);
548 if (block != NULL_TREE)
550 BLOCK_VARS (block) = decls;
551 BLOCK_SUBBLOCKS (block) = subblocks;
554 /* In each subblock, record that this is its superior. */
556 for (link = subblocks; link; link = TREE_CHAIN (link))
557 BLOCK_SUPERCONTEXT (link) = block;
559 /* We still support the old for-scope rules, whereby the variables
560 in a for-init statement were in scope after the for-statement
561 ended. We only use the new rules if flag_new_for_scope is
564 = current_binding_level->kind == sk_for && flag_new_for_scope == 1;
566 /* Before we remove the declarations first check for unused variables. */
567 if (warn_unused_variable
568 && !processing_template_decl)
569 for (decl = getdecls (); decl; decl = TREE_CHAIN (decl))
570 if (TREE_CODE (decl) == VAR_DECL
571 && ! TREE_USED (decl)
572 && ! DECL_IN_SYSTEM_HEADER (decl)
573 && DECL_NAME (decl) && ! DECL_ARTIFICIAL (decl))
574 warning ("%Junused variable %qD", decl, decl);
576 /* Remove declarations for all the DECLs in this level. */
577 for (link = decls; link; link = TREE_CHAIN (link))
579 if (leaving_for_scope && TREE_CODE (link) == VAR_DECL
582 tree name = DECL_NAME (link);
586 ob = outer_binding (name,
587 IDENTIFIER_BINDING (name),
590 ns_binding = IDENTIFIER_NAMESPACE_VALUE (name);
592 ns_binding = NULL_TREE;
594 if (ob && ob->scope == current_binding_level->level_chain)
595 /* We have something like:
600 and we are leaving the `for' scope. There's no reason to
601 keep the binding of the inner `i' in this case. */
602 pop_binding (name, link);
603 else if ((ob && (TREE_CODE (ob->value) == TYPE_DECL))
604 || (ns_binding && TREE_CODE (ns_binding) == TYPE_DECL))
605 /* Here, we have something like:
613 We must pop the for-scope binding so we know what's a
614 type and what isn't. */
615 pop_binding (name, link);
618 /* Mark this VAR_DECL as dead so that we can tell we left it
619 there only for backward compatibility. */
620 DECL_DEAD_FOR_LOCAL (link) = 1;
622 /* Keep track of what should have happened when we
623 popped the binding. */
625 DECL_SHADOWED_FOR_VAR (link) = ob->value;
627 /* Add it to the list of dead variables in the next
628 outermost binding to that we can remove these when we
629 leave that binding. */
630 current_binding_level->level_chain->dead_vars_from_for
631 = tree_cons (NULL_TREE, link,
632 current_binding_level->level_chain->
635 /* Although we don't pop the cxx_binding, we do clear
636 its SCOPE since the scope is going away now. */
637 IDENTIFIER_BINDING (name)->scope
638 = current_binding_level->level_chain;
645 /* Remove the binding. */
648 if (TREE_CODE (decl) == TREE_LIST)
649 decl = TREE_VALUE (decl);
652 if (TREE_CODE (name) == OVERLOAD)
653 name = OVL_FUNCTION (name);
655 gcc_assert (DECL_P (name));
656 pop_binding (DECL_NAME (name), decl);
660 /* Remove declarations for any `for' variables from inner scopes
661 that we kept around. */
662 for (link = current_binding_level->dead_vars_from_for;
663 link; link = TREE_CHAIN (link))
664 pop_binding (DECL_NAME (TREE_VALUE (link)), TREE_VALUE (link));
666 /* Restore the IDENTIFIER_TYPE_VALUEs. */
667 for (link = current_binding_level->type_shadowed;
668 link; link = TREE_CHAIN (link))
669 SET_IDENTIFIER_TYPE_VALUE (TREE_PURPOSE (link), TREE_VALUE (link));
671 /* Restore the IDENTIFIER_LABEL_VALUEs for local labels. */
672 for (link = current_binding_level->shadowed_labels;
674 link = TREE_CHAIN (link))
675 pop_label (TREE_VALUE (link), TREE_PURPOSE (link));
677 /* There may be OVERLOADs (wrapped in TREE_LISTs) on the BLOCK_VARs
678 list if a `using' declaration put them there. The debugging
679 back-ends won't understand OVERLOAD, so we remove them here.
680 Because the BLOCK_VARS are (temporarily) shared with
681 CURRENT_BINDING_LEVEL->NAMES we must do this fixup after we have
682 popped all the bindings. */
687 for (d = &BLOCK_VARS (block); *d; )
689 if (TREE_CODE (*d) == TREE_LIST)
690 *d = TREE_CHAIN (*d);
692 d = &TREE_CHAIN (*d);
696 /* If the level being exited is the top level of a function,
697 check over all the labels. */
700 /* Since this is the top level block of a function, the vars are
701 the function's parameters. Don't leave them in the BLOCK
702 because they are found in the FUNCTION_DECL instead. */
703 BLOCK_VARS (block) = 0;
707 kind = current_binding_level->kind;
708 if (kind == sk_cleanup)
712 /* If this is a temporary binding created for a cleanup, then we'll
713 have pushed a statement list level. Pop that, create a new
714 BIND_EXPR for the block, and insert it into the stream. */
715 stmt = pop_stmt_list (current_binding_level->statement_list);
716 stmt = c_build_bind_expr (block, stmt);
722 DECL_INITIAL (current_function_decl) = block;
724 current_binding_level->blocks
725 = chainon (current_binding_level->blocks, block);
727 /* If we did not make a block for the level just exited,
728 any blocks made for inner levels
729 (since they cannot be recorded as subblocks in that level)
730 must be carried forward so they will later become subblocks
731 of something else. */
733 current_binding_level->blocks
734 = chainon (current_binding_level->blocks, subblocks);
736 /* Each and every BLOCK node created here in `poplevel' is important
737 (e.g. for proper debugging information) so if we created one
738 earlier, mark it as "used". */
740 TREE_USED (block) = 1;
742 /* All temporary bindings created for cleanups are popped silently. */
743 if (kind == sk_cleanup)
746 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, block);
749 /* Delete the node BLOCK from the current binding level.
750 This is used for the block inside a stmt expr ({...})
751 so that the block can be reinserted where appropriate. */
754 delete_block (tree block)
757 if (current_binding_level->blocks == block)
758 current_binding_level->blocks = TREE_CHAIN (block);
759 for (t = current_binding_level->blocks; t;)
761 if (TREE_CHAIN (t) == block)
762 TREE_CHAIN (t) = TREE_CHAIN (block);
766 TREE_CHAIN (block) = NULL_TREE;
767 /* Clear TREE_USED which is always set by poplevel.
768 The flag is set again if insert_block is called. */
769 TREE_USED (block) = 0;
772 /* Insert BLOCK at the end of the list of subblocks of the
773 current binding level. This is used when a BIND_EXPR is expanded,
774 to handle the BLOCK node inside the BIND_EXPR. */
777 insert_block (tree block)
779 TREE_USED (block) = 1;
780 current_binding_level->blocks
781 = chainon (current_binding_level->blocks, block);
784 /* Returns nonzero if T is a virtual function table. */
787 vtable_decl_p (tree t, void* data ATTRIBUTE_UNUSED )
789 return (TREE_CODE (t) == VAR_DECL && DECL_VIRTUAL_P (t));
792 /* Returns nonzero if T is a TYPE_DECL for a type with virtual
796 vtype_decl_p (tree t, void *data ATTRIBUTE_UNUSED )
798 return (TREE_CODE (t) == TYPE_DECL
799 && TREE_CODE (TREE_TYPE (t)) == RECORD_TYPE
800 && TYPE_POLYMORPHIC_P (TREE_TYPE (t)));
803 struct walk_globals_data {
809 /* Walk the vtable declarations in NAMESPACE. Whenever one is found
810 for which P returns nonzero, call F with its address. If any call
811 to F returns a nonzero value, return a nonzero value. */
814 walk_vtables_r (tree namespace, void* data)
816 struct walk_globals_data* wgd = (struct walk_globals_data *) data;
817 walk_globals_fn f = wgd->f;
819 tree decl = NAMESPACE_LEVEL (namespace)->vtables;
822 for (; decl ; decl = TREE_CHAIN (decl))
823 result |= (*f) (&decl, d);
828 /* Walk the vtable declarations. Whenever one is found for which P
829 returns nonzero, call F with its address. If any call to F
830 returns a nonzero value, return a nonzero value. */
832 walk_vtables (walk_globals_pred p, walk_globals_fn f, void *data)
834 struct walk_globals_data wgd;
839 return walk_namespaces (walk_vtables_r, &wgd);
842 /* Walk all the namespaces contained NAMESPACE, including NAMESPACE
843 itself, calling F for each. The DATA is passed to F as well. */
846 walk_namespaces_r (tree namespace, walk_namespaces_fn f, void* data)
849 tree current = NAMESPACE_LEVEL (namespace)->namespaces;
851 result |= (*f) (namespace, data);
853 for (; current; current = TREE_CHAIN (current))
854 result |= walk_namespaces_r (current, f, data);
859 /* Walk all the namespaces, calling F for each. The DATA is passed to
863 walk_namespaces (walk_namespaces_fn f, void* data)
865 return walk_namespaces_r (global_namespace, f, data);
868 /* Walk the global declarations in NAMESPACE. Whenever one is found
869 for which P returns nonzero, call F with its address. If any call
870 to F returns a nonzero value, return a nonzero value. */
873 walk_globals_r (tree namespace, void* data)
875 struct walk_globals_data* wgd = (struct walk_globals_data *) data;
876 walk_globals_pred p = wgd->p;
877 walk_globals_fn f = wgd->f;
882 t = &NAMESPACE_LEVEL (namespace)->names;
889 result |= (*f) (t, d);
891 /* If F changed *T, then *T still points at the next item to
894 t = &TREE_CHAIN (*t);
900 /* Walk the global declarations. Whenever one is found for which P
901 returns true, call F with its address. If any call to F
902 returns true, return true. */
905 walk_globals (walk_globals_pred p, walk_globals_fn f, void *data)
907 struct walk_globals_data wgd;
912 return walk_namespaces (walk_globals_r, &wgd);
915 /* Call wrapup_globals_declarations for the globals in NAMESPACE. If
916 DATA is non-NULL, this is the last time we will call
917 wrapup_global_declarations for this NAMESPACE. */
920 wrapup_globals_for_namespace (tree namespace, void* data)
922 struct cp_binding_level *level = NAMESPACE_LEVEL (namespace);
923 varray_type statics = level->static_decls;
924 tree *vec = &VARRAY_TREE (statics, 0);
925 int len = VARRAY_ACTIVE_SIZE (statics);
926 int last_time = (data != 0);
930 check_global_declarations (vec, len);
934 /* Write out any globals that need to be output. */
935 return wrapup_global_declarations (vec, len);
939 /* In C++, you don't have to write `struct S' to refer to `S'; you
940 can just use `S'. We accomplish this by creating a TYPE_DECL as
941 if the user had written `typedef struct S S'. Create and return
942 the TYPE_DECL for TYPE. */
945 create_implicit_typedef (tree name, tree type)
949 decl = build_decl (TYPE_DECL, name, type);
950 DECL_ARTIFICIAL (decl) = 1;
951 /* There are other implicit type declarations, like the one *within*
952 a class that allows you to write `S::S'. We must distinguish
954 SET_DECL_IMPLICIT_TYPEDEF_P (decl);
955 TYPE_NAME (type) = decl;
960 /* Remember a local name for name-mangling purposes. */
963 push_local_name (tree decl)
968 timevar_push (TV_NAME_LOOKUP);
970 VARRAY_TREE_INIT (local_names, 8, "local_names");
972 name = DECL_NAME (decl);
974 nelts = VARRAY_ACTIVE_SIZE (local_names);
975 for (i = 0; i < nelts; i++)
977 t = VARRAY_TREE (local_names, i);
978 if (DECL_NAME (t) == name)
980 if (!DECL_LANG_SPECIFIC (decl))
981 retrofit_lang_decl (decl);
982 DECL_LANG_SPECIFIC (decl)->decl_flags.u2sel = 1;
983 if (DECL_LANG_SPECIFIC (t))
984 DECL_DISCRIMINATOR (decl) = DECL_DISCRIMINATOR (t) + 1;
986 DECL_DISCRIMINATOR (decl) = 1;
988 VARRAY_TREE (local_names, i) = decl;
989 timevar_pop (TV_NAME_LOOKUP);
994 VARRAY_PUSH_TREE (local_names, decl);
995 timevar_pop (TV_NAME_LOOKUP);
998 /* Subroutine of duplicate_decls: return truthvalue of whether
999 or not types of these decls match.
1001 For C++, we must compare the parameter list so that `int' can match
1002 `int&' in a parameter position, but `int&' is not confused with
1006 decls_match (tree newdecl, tree olddecl)
1010 if (newdecl == olddecl)
1013 if (TREE_CODE (newdecl) != TREE_CODE (olddecl))
1014 /* If the two DECLs are not even the same kind of thing, we're not
1015 interested in their types. */
1018 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1020 tree f1 = TREE_TYPE (newdecl);
1021 tree f2 = TREE_TYPE (olddecl);
1022 tree p1 = TYPE_ARG_TYPES (f1);
1023 tree p2 = TYPE_ARG_TYPES (f2);
1025 if (CP_DECL_CONTEXT (newdecl) != CP_DECL_CONTEXT (olddecl)
1026 && ! (DECL_EXTERN_C_P (newdecl)
1027 && DECL_EXTERN_C_P (olddecl)))
1030 if (TREE_CODE (f1) != TREE_CODE (f2))
1033 if (same_type_p (TREE_TYPE (f1), TREE_TYPE (f2)))
1035 if (p2 == NULL_TREE && DECL_EXTERN_C_P (olddecl)
1036 && (DECL_BUILT_IN (olddecl)
1037 #ifndef NO_IMPLICIT_EXTERN_C
1038 || (DECL_IN_SYSTEM_HEADER (newdecl) && !DECL_CLASS_SCOPE_P (newdecl))
1039 || (DECL_IN_SYSTEM_HEADER (olddecl) && !DECL_CLASS_SCOPE_P (olddecl))
1043 types_match = self_promoting_args_p (p1);
1044 if (p1 == void_list_node)
1045 TREE_TYPE (newdecl) = TREE_TYPE (olddecl);
1047 #ifndef NO_IMPLICIT_EXTERN_C
1048 else if (p1 == NULL_TREE
1049 && (DECL_EXTERN_C_P (olddecl)
1050 && DECL_IN_SYSTEM_HEADER (olddecl)
1051 && !DECL_CLASS_SCOPE_P (olddecl))
1052 && (DECL_EXTERN_C_P (newdecl)
1053 && DECL_IN_SYSTEM_HEADER (newdecl)
1054 && !DECL_CLASS_SCOPE_P (newdecl)))
1056 types_match = self_promoting_args_p (p2);
1057 TREE_TYPE (newdecl) = TREE_TYPE (olddecl);
1061 types_match = compparms (p1, p2);
1066 else if (TREE_CODE (newdecl) == TEMPLATE_DECL)
1068 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl))
1069 != TREE_CODE (DECL_TEMPLATE_RESULT (olddecl)))
1072 if (!comp_template_parms (DECL_TEMPLATE_PARMS (newdecl),
1073 DECL_TEMPLATE_PARMS (olddecl)))
1076 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == TYPE_DECL)
1077 types_match = same_type_p (TREE_TYPE (DECL_TEMPLATE_RESULT (olddecl)),
1078 TREE_TYPE (DECL_TEMPLATE_RESULT (newdecl)));
1080 types_match = decls_match (DECL_TEMPLATE_RESULT (olddecl),
1081 DECL_TEMPLATE_RESULT (newdecl));
1085 if (TREE_TYPE (newdecl) == error_mark_node)
1086 types_match = TREE_TYPE (olddecl) == error_mark_node;
1087 else if (TREE_TYPE (olddecl) == NULL_TREE)
1088 types_match = TREE_TYPE (newdecl) == NULL_TREE;
1089 else if (TREE_TYPE (newdecl) == NULL_TREE)
1092 types_match = comptypes (TREE_TYPE (newdecl),
1093 TREE_TYPE (olddecl),
1094 COMPARE_REDECLARATION);
1100 /* If NEWDECL is `static' and an `extern' was seen previously,
1101 warn about it. OLDDECL is the previous declaration.
1103 Note that this does not apply to the C++ case of declaring
1104 a variable `extern const' and then later `const'.
1106 Don't complain about built-in functions, since they are beyond
1107 the user's control. */
1110 warn_extern_redeclared_static (tree newdecl, tree olddecl)
1114 if (TREE_CODE (newdecl) == TYPE_DECL
1115 || TREE_CODE (newdecl) == TEMPLATE_DECL
1116 || TREE_CODE (newdecl) == CONST_DECL
1117 || TREE_CODE (newdecl) == NAMESPACE_DECL)
1120 /* Don't get confused by static member functions; that's a different
1122 if (TREE_CODE (newdecl) == FUNCTION_DECL
1123 && DECL_STATIC_FUNCTION_P (newdecl))
1126 /* If the old declaration was `static', or the new one isn't, then
1127 then everything is OK. */
1128 if (DECL_THIS_STATIC (olddecl) || !DECL_THIS_STATIC (newdecl))
1131 /* It's OK to declare a builtin function as `static'. */
1132 if (TREE_CODE (olddecl) == FUNCTION_DECL
1133 && DECL_ARTIFICIAL (olddecl))
1136 name = DECL_ASSEMBLER_NAME (newdecl);
1137 pedwarn ("%qD was declared %<extern%> and later %<static%>", newdecl);
1138 cp_pedwarn_at ("previous declaration of %qD", olddecl);
1141 /* If NEWDECL is a redeclaration of OLDDECL, merge the declarations.
1142 If the redeclaration is invalid, a diagnostic is issued, and the
1143 error_mark_node is returned. Otherwise, OLDDECL is returned.
1145 If NEWDECL is not a redeclaration of OLDDECL, NULL_TREE is
1149 duplicate_decls (tree newdecl, tree olddecl)
1151 unsigned olddecl_uid = DECL_UID (olddecl);
1152 int olddecl_friend = 0, types_match = 0;
1153 int new_defines_function = 0;
1155 if (newdecl == olddecl)
1158 types_match = decls_match (newdecl, olddecl);
1160 /* If either the type of the new decl or the type of the old decl is an
1161 error_mark_node, then that implies that we have already issued an
1162 error (earlier) for some bogus type specification, and in that case,
1163 it is rather pointless to harass the user with yet more error message
1164 about the same declaration, so just pretend the types match here. */
1165 if (TREE_TYPE (newdecl) == error_mark_node
1166 || TREE_TYPE (olddecl) == error_mark_node)
1169 if (DECL_P (olddecl)
1170 && TREE_CODE (newdecl) == FUNCTION_DECL
1171 && TREE_CODE (olddecl) == FUNCTION_DECL
1172 && (DECL_UNINLINABLE (newdecl) || DECL_UNINLINABLE (olddecl)))
1174 if (DECL_DECLARED_INLINE_P (newdecl)
1175 && DECL_UNINLINABLE (newdecl)
1176 && lookup_attribute ("noinline", DECL_ATTRIBUTES (newdecl)))
1177 /* Already warned elsewhere. */;
1178 else if (DECL_DECLARED_INLINE_P (olddecl)
1179 && DECL_UNINLINABLE (olddecl)
1180 && lookup_attribute ("noinline", DECL_ATTRIBUTES (olddecl)))
1181 /* Already warned. */;
1182 else if (DECL_DECLARED_INLINE_P (newdecl)
1183 && DECL_UNINLINABLE (olddecl)
1184 && lookup_attribute ("noinline", DECL_ATTRIBUTES (olddecl)))
1186 warning ("%Jfunction %qD redeclared as inline", newdecl, newdecl);
1187 warning ("%Jprevious declaration of %qD with attribute noinline",
1190 else if (DECL_DECLARED_INLINE_P (olddecl)
1191 && DECL_UNINLINABLE (newdecl)
1192 && lookup_attribute ("noinline", DECL_ATTRIBUTES (newdecl)))
1194 warning ("%Jfunction %qD redeclared with attribute noinline",
1196 warning ("%Jprevious declaration of %qD was inline",
1201 /* Check for redeclaration and other discrepancies. */
1202 if (TREE_CODE (olddecl) == FUNCTION_DECL
1203 && DECL_ARTIFICIAL (olddecl))
1205 if (TREE_CODE (newdecl) != FUNCTION_DECL)
1207 /* Avoid warnings redeclaring anticipated built-ins. */
1208 if (DECL_ANTICIPATED (olddecl))
1211 /* If you declare a built-in or predefined function name as static,
1212 the old definition is overridden, but optionally warn this was a
1213 bad choice of name. */
1214 if (! TREE_PUBLIC (newdecl))
1217 warning ("shadowing %s function %q#D",
1218 DECL_BUILT_IN (olddecl) ? "built-in" : "library",
1220 /* Discard the old built-in function. */
1223 /* If the built-in is not ansi, then programs can override
1224 it even globally without an error. */
1225 else if (! DECL_BUILT_IN (olddecl))
1226 warning ("library function %q#D redeclared as non-function %q#D",
1230 error ("declaration of %q#D", newdecl);
1231 error ("conflicts with built-in declaration %q#D",
1236 else if (!types_match)
1238 /* Avoid warnings redeclaring anticipated built-ins. */
1239 if (DECL_ANTICIPATED (olddecl))
1241 /* Deal with fileptr_type_node. FILE type is not known
1242 at the time we create the builtins. */
1245 for (t1 = TYPE_ARG_TYPES (TREE_TYPE (newdecl)),
1246 t2 = TYPE_ARG_TYPES (TREE_TYPE (olddecl));
1248 t1 = TREE_CHAIN (t1), t2 = TREE_CHAIN (t2))
1251 else if (TREE_VALUE (t2) == fileptr_type_node)
1253 tree t = TREE_VALUE (t1);
1255 if (TREE_CODE (t) == POINTER_TYPE
1256 && TYPE_NAME (TREE_TYPE (t))
1257 && DECL_NAME (TYPE_NAME (TREE_TYPE (t)))
1258 == get_identifier ("FILE")
1259 && compparms (TREE_CHAIN (t1), TREE_CHAIN (t2)))
1261 tree oldargs = TYPE_ARG_TYPES (TREE_TYPE (olddecl));
1263 TYPE_ARG_TYPES (TREE_TYPE (olddecl))
1264 = TYPE_ARG_TYPES (TREE_TYPE (newdecl));
1265 types_match = decls_match (newdecl, olddecl);
1267 return duplicate_decls (newdecl, olddecl);
1268 TYPE_ARG_TYPES (TREE_TYPE (olddecl)) = oldargs;
1271 else if (! same_type_p (TREE_VALUE (t1), TREE_VALUE (t2)))
1274 else if ((DECL_EXTERN_C_P (newdecl)
1275 && DECL_EXTERN_C_P (olddecl))
1276 || compparms (TYPE_ARG_TYPES (TREE_TYPE (newdecl)),
1277 TYPE_ARG_TYPES (TREE_TYPE (olddecl))))
1279 /* A near match; override the builtin. */
1281 if (TREE_PUBLIC (newdecl))
1283 warning ("new declaration %q#D", newdecl);
1284 warning ("ambiguates built-in declaration %q#D",
1287 else if (warn_shadow)
1288 warning ("shadowing %s function %q#D",
1289 DECL_BUILT_IN (olddecl) ? "built-in" : "library",
1293 /* Discard the old built-in function. */
1296 /* Replace the old RTL to avoid problems with inlining. */
1297 COPY_DECL_RTL (newdecl, olddecl);
1299 /* Even if the types match, prefer the new declarations type
1300 for anticipated built-ins, for exception lists, etc... */
1301 else if (DECL_ANTICIPATED (olddecl))
1303 tree type = TREE_TYPE (newdecl);
1304 tree attribs = (*targetm.merge_type_attributes)
1305 (TREE_TYPE (olddecl), type);
1307 type = cp_build_type_attribute_variant (type, attribs);
1308 TREE_TYPE (newdecl) = TREE_TYPE (olddecl) = type;
1311 /* Whether or not the builtin can throw exceptions has no
1312 bearing on this declarator. */
1313 TREE_NOTHROW (olddecl) = 0;
1315 if (DECL_THIS_STATIC (newdecl) && !DECL_THIS_STATIC (olddecl))
1317 /* If a builtin function is redeclared as `static', merge
1318 the declarations, but make the original one static. */
1319 DECL_THIS_STATIC (olddecl) = 1;
1320 TREE_PUBLIC (olddecl) = 0;
1322 /* Make the old declaration consistent with the new one so
1323 that all remnants of the builtin-ness of this function
1324 will be banished. */
1325 SET_DECL_LANGUAGE (olddecl, DECL_LANGUAGE (newdecl));
1326 COPY_DECL_RTL (newdecl, olddecl);
1329 else if (TREE_CODE (olddecl) != TREE_CODE (newdecl))
1331 if ((TREE_CODE (olddecl) == TYPE_DECL && DECL_ARTIFICIAL (olddecl)
1332 && TREE_CODE (newdecl) != TYPE_DECL
1333 && ! (TREE_CODE (newdecl) == TEMPLATE_DECL
1334 && TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == TYPE_DECL))
1335 || (TREE_CODE (newdecl) == TYPE_DECL && DECL_ARTIFICIAL (newdecl)
1336 && TREE_CODE (olddecl) != TYPE_DECL
1337 && ! (TREE_CODE (olddecl) == TEMPLATE_DECL
1338 && (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl))
1341 /* We do nothing special here, because C++ does such nasty
1342 things with TYPE_DECLs. Instead, just let the TYPE_DECL
1343 get shadowed, and know that if we need to find a TYPE_DECL
1344 for a given name, we can look in the IDENTIFIER_TYPE_VALUE
1345 slot of the identifier. */
1349 if ((TREE_CODE (newdecl) == FUNCTION_DECL
1350 && DECL_FUNCTION_TEMPLATE_P (olddecl))
1351 || (TREE_CODE (olddecl) == FUNCTION_DECL
1352 && DECL_FUNCTION_TEMPLATE_P (newdecl)))
1355 error ("%q#D redeclared as different kind of symbol", newdecl);
1356 if (TREE_CODE (olddecl) == TREE_LIST)
1357 olddecl = TREE_VALUE (olddecl);
1358 cp_error_at ("previous declaration of %q#D", olddecl);
1360 return error_mark_node;
1362 else if (!types_match)
1364 if (CP_DECL_CONTEXT (newdecl) != CP_DECL_CONTEXT (olddecl))
1365 /* These are certainly not duplicate declarations; they're
1366 from different scopes. */
1369 if (TREE_CODE (newdecl) == TEMPLATE_DECL)
1371 /* The name of a class template may not be declared to refer to
1372 any other template, class, function, object, namespace, value,
1373 or type in the same scope. */
1374 if (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl)) == TYPE_DECL
1375 || TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == TYPE_DECL)
1377 error ("declaration of template %q#D", newdecl);
1378 cp_error_at ("conflicts with previous declaration %q#D",
1381 else if (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl)) == FUNCTION_DECL
1382 && TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == FUNCTION_DECL
1383 && compparms (TYPE_ARG_TYPES (TREE_TYPE (DECL_TEMPLATE_RESULT (olddecl))),
1384 TYPE_ARG_TYPES (TREE_TYPE (DECL_TEMPLATE_RESULT (newdecl))))
1385 && comp_template_parms (DECL_TEMPLATE_PARMS (newdecl),
1386 DECL_TEMPLATE_PARMS (olddecl))
1387 /* Template functions can be disambiguated by
1389 && same_type_p (TREE_TYPE (TREE_TYPE (newdecl)),
1390 TREE_TYPE (TREE_TYPE (olddecl))))
1392 error ("new declaration %q#D", newdecl);
1393 cp_error_at ("ambiguates old declaration %q#D", olddecl);
1397 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1399 if (DECL_EXTERN_C_P (newdecl) && DECL_EXTERN_C_P (olddecl))
1401 error ("declaration of C function %q#D conflicts with",
1403 cp_error_at ("previous declaration %q#D here", olddecl);
1405 else if (compparms (TYPE_ARG_TYPES (TREE_TYPE (newdecl)),
1406 TYPE_ARG_TYPES (TREE_TYPE (olddecl))))
1408 error ("new declaration %q#D", newdecl);
1409 cp_error_at ("ambiguates old declaration %q#D", olddecl);
1416 error ("conflicting declaration %q#D", newdecl);
1417 cp_error_at ("%qD has a previous declaration as %q#D",
1419 return error_mark_node;
1422 else if (TREE_CODE (newdecl) == FUNCTION_DECL
1423 && ((DECL_TEMPLATE_SPECIALIZATION (olddecl)
1424 && (!DECL_TEMPLATE_INFO (newdecl)
1425 || (DECL_TI_TEMPLATE (newdecl)
1426 != DECL_TI_TEMPLATE (olddecl))))
1427 || (DECL_TEMPLATE_SPECIALIZATION (newdecl)
1428 && (!DECL_TEMPLATE_INFO (olddecl)
1429 || (DECL_TI_TEMPLATE (olddecl)
1430 != DECL_TI_TEMPLATE (newdecl))))))
1431 /* It's OK to have a template specialization and a non-template
1432 with the same type, or to have specializations of two
1433 different templates with the same type. Note that if one is a
1434 specialization, and the other is an instantiation of the same
1435 template, that we do not exit at this point. That situation
1436 can occur if we instantiate a template class, and then
1437 specialize one of its methods. This situation is valid, but
1438 the declarations must be merged in the usual way. */
1440 else if (TREE_CODE (newdecl) == FUNCTION_DECL
1441 && ((DECL_TEMPLATE_INSTANTIATION (olddecl)
1442 && !DECL_USE_TEMPLATE (newdecl))
1443 || (DECL_TEMPLATE_INSTANTIATION (newdecl)
1444 && !DECL_USE_TEMPLATE (olddecl))))
1445 /* One of the declarations is a template instantiation, and the
1446 other is not a template at all. That's OK. */
1448 else if (TREE_CODE (newdecl) == NAMESPACE_DECL)
1450 /* In [namespace.alias] we have:
1452 In a declarative region, a namespace-alias-definition can be
1453 used to redefine a namespace-alias declared in that declarative
1454 region to refer only to the namespace to which it already
1457 Therefore, if we encounter a second alias directive for the same
1458 alias, we can just ignore the second directive. */
1459 if (DECL_NAMESPACE_ALIAS (newdecl)
1460 && (DECL_NAMESPACE_ALIAS (newdecl)
1461 == DECL_NAMESPACE_ALIAS (olddecl)))
1463 /* [namespace.alias]
1465 A namespace-name or namespace-alias shall not be declared as
1466 the name of any other entity in the same declarative region.
1467 A namespace-name defined at global scope shall not be
1468 declared as the name of any other entity in any global scope
1470 error ("declaration of namespace %qD conflicts with", newdecl);
1471 cp_error_at ("previous declaration of namespace %qD here", olddecl);
1472 return error_mark_node;
1476 const char *errmsg = redeclaration_error_message (newdecl, olddecl);
1479 error (errmsg, newdecl);
1480 if (DECL_NAME (olddecl) != NULL_TREE)
1481 cp_error_at ((DECL_INITIAL (olddecl)
1482 && namespace_bindings_p ())
1483 ? "%q#D previously defined here"
1484 : "%q#D previously declared here", olddecl);
1485 return error_mark_node;
1487 else if (TREE_CODE (olddecl) == FUNCTION_DECL
1488 && DECL_INITIAL (olddecl) != NULL_TREE
1489 && TYPE_ARG_TYPES (TREE_TYPE (olddecl)) == NULL_TREE
1490 && TYPE_ARG_TYPES (TREE_TYPE (newdecl)) != NULL_TREE)
1492 /* Prototype decl follows defn w/o prototype. */
1493 cp_warning_at ("prototype for %q#D", newdecl);
1494 warning ("%Jfollows non-prototype definition here", olddecl);
1496 else if (TREE_CODE (olddecl) == FUNCTION_DECL
1497 && DECL_LANGUAGE (newdecl) != DECL_LANGUAGE (olddecl))
1499 /* extern "C" int foo ();
1500 int foo () { bar (); }
1502 if (current_lang_depth () == 0)
1503 SET_DECL_LANGUAGE (newdecl, DECL_LANGUAGE (olddecl));
1506 cp_error_at ("previous declaration of %q#D with %qL linkage",
1507 olddecl, DECL_LANGUAGE (olddecl));
1508 error ("conflicts with new declaration with %qL linkage",
1509 DECL_LANGUAGE (newdecl));
1513 if (DECL_LANG_SPECIFIC (olddecl) && DECL_USE_TEMPLATE (olddecl))
1515 else if (TREE_CODE (olddecl) == FUNCTION_DECL)
1517 tree t1 = TYPE_ARG_TYPES (TREE_TYPE (olddecl));
1518 tree t2 = TYPE_ARG_TYPES (TREE_TYPE (newdecl));
1521 if (TREE_CODE (TREE_TYPE (newdecl)) == METHOD_TYPE)
1522 t1 = TREE_CHAIN (t1), t2 = TREE_CHAIN (t2);
1524 for (; t1 && t1 != void_list_node;
1525 t1 = TREE_CHAIN (t1), t2 = TREE_CHAIN (t2), i++)
1526 if (TREE_PURPOSE (t1) && TREE_PURPOSE (t2))
1528 if (1 == simple_cst_equal (TREE_PURPOSE (t1),
1531 pedwarn ("default argument given for parameter %d of %q#D",
1533 cp_pedwarn_at ("after previous specification in %q#D",
1538 error ("default argument given for parameter %d of %q#D",
1540 cp_error_at ("after previous specification in %q#D",
1545 if (DECL_DECLARED_INLINE_P (newdecl)
1546 && ! DECL_DECLARED_INLINE_P (olddecl)
1547 && TREE_ADDRESSABLE (olddecl) && warn_inline)
1549 warning ("%q#D was used before it was declared inline", newdecl);
1550 warning ("%Jprevious non-inline declaration here", olddecl);
1555 /* Do not merge an implicit typedef with an explicit one. In:
1559 typedef class A A __attribute__ ((foo));
1561 the attribute should apply only to the typedef. */
1562 if (TREE_CODE (olddecl) == TYPE_DECL
1563 && (DECL_IMPLICIT_TYPEDEF_P (olddecl)
1564 || DECL_IMPLICIT_TYPEDEF_P (newdecl)))
1567 /* If new decl is `static' and an `extern' was seen previously,
1569 warn_extern_redeclared_static (newdecl, olddecl);
1571 /* We have committed to returning 1 at this point. */
1572 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1574 /* Now that functions must hold information normally held
1575 by field decls, there is extra work to do so that
1576 declaration information does not get destroyed during
1578 if (DECL_VINDEX (olddecl))
1579 DECL_VINDEX (newdecl) = DECL_VINDEX (olddecl);
1580 if (DECL_CONTEXT (olddecl))
1581 DECL_CONTEXT (newdecl) = DECL_CONTEXT (olddecl);
1582 DECL_STATIC_CONSTRUCTOR (newdecl) |= DECL_STATIC_CONSTRUCTOR (olddecl);
1583 DECL_STATIC_DESTRUCTOR (newdecl) |= DECL_STATIC_DESTRUCTOR (olddecl);
1584 DECL_PURE_VIRTUAL_P (newdecl) |= DECL_PURE_VIRTUAL_P (olddecl);
1585 DECL_VIRTUAL_P (newdecl) |= DECL_VIRTUAL_P (olddecl);
1586 DECL_THIS_STATIC (newdecl) |= DECL_THIS_STATIC (olddecl);
1587 if (DECL_OVERLOADED_OPERATOR_P (olddecl) != ERROR_MARK)
1588 SET_OVERLOADED_OPERATOR_CODE
1589 (newdecl, DECL_OVERLOADED_OPERATOR_P (olddecl));
1590 new_defines_function = DECL_INITIAL (newdecl) != NULL_TREE;
1592 /* Optionally warn about more than one declaration for the same
1593 name, but don't warn about a function declaration followed by a
1595 if (warn_redundant_decls && ! DECL_ARTIFICIAL (olddecl)
1596 && !(new_defines_function && DECL_INITIAL (olddecl) == NULL_TREE)
1597 /* Don't warn about extern decl followed by definition. */
1598 && !(DECL_EXTERNAL (olddecl) && ! DECL_EXTERNAL (newdecl))
1599 /* Don't warn about friends, let add_friend take care of it. */
1600 && ! (DECL_FRIEND_P (newdecl) || DECL_FRIEND_P (olddecl)))
1602 warning ("redundant redeclaration of %qD in same scope", newdecl);
1603 cp_warning_at ("previous declaration of %qD", olddecl);
1607 /* Deal with C++: must preserve virtual function table size. */
1608 if (TREE_CODE (olddecl) == TYPE_DECL)
1610 tree newtype = TREE_TYPE (newdecl);
1611 tree oldtype = TREE_TYPE (olddecl);
1613 if (newtype != error_mark_node && oldtype != error_mark_node
1614 && TYPE_LANG_SPECIFIC (newtype) && TYPE_LANG_SPECIFIC (oldtype))
1615 CLASSTYPE_FRIEND_CLASSES (newtype)
1616 = CLASSTYPE_FRIEND_CLASSES (oldtype);
1618 DECL_ORIGINAL_TYPE (newdecl) = DECL_ORIGINAL_TYPE (olddecl);
1621 /* Copy all the DECL_... slots specified in the new decl
1622 except for any that we copy here from the old type. */
1623 DECL_ATTRIBUTES (newdecl)
1624 = (*targetm.merge_decl_attributes) (olddecl, newdecl);
1626 if (TREE_CODE (newdecl) == TEMPLATE_DECL)
1628 TREE_TYPE (olddecl) = TREE_TYPE (DECL_TEMPLATE_RESULT (olddecl));
1629 DECL_TEMPLATE_SPECIALIZATIONS (olddecl)
1630 = chainon (DECL_TEMPLATE_SPECIALIZATIONS (olddecl),
1631 DECL_TEMPLATE_SPECIALIZATIONS (newdecl));
1633 /* If the new declaration is a definition, update the file and
1634 line information on the declaration. */
1635 if (DECL_INITIAL (DECL_TEMPLATE_RESULT (olddecl)) == NULL_TREE
1636 && DECL_INITIAL (DECL_TEMPLATE_RESULT (newdecl)) != NULL_TREE)
1638 DECL_SOURCE_LOCATION (olddecl)
1639 = DECL_SOURCE_LOCATION (DECL_TEMPLATE_RESULT (olddecl))
1640 = DECL_SOURCE_LOCATION (newdecl);
1641 if (DECL_FUNCTION_TEMPLATE_P (newdecl))
1642 DECL_ARGUMENTS (DECL_TEMPLATE_RESULT (olddecl))
1643 = DECL_ARGUMENTS (DECL_TEMPLATE_RESULT (newdecl));
1646 if (DECL_FUNCTION_TEMPLATE_P (newdecl))
1648 DECL_INLINE (DECL_TEMPLATE_RESULT (olddecl))
1649 |= DECL_INLINE (DECL_TEMPLATE_RESULT (newdecl));
1650 DECL_DECLARED_INLINE_P (DECL_TEMPLATE_RESULT (olddecl))
1651 |= DECL_DECLARED_INLINE_P (DECL_TEMPLATE_RESULT (newdecl));
1659 /* Automatically handles default parameters. */
1660 tree oldtype = TREE_TYPE (olddecl);
1663 /* Merge the data types specified in the two decls. */
1664 newtype = merge_types (TREE_TYPE (newdecl), TREE_TYPE (olddecl));
1666 /* If merge_types produces a non-typedef type, just use the old type. */
1667 if (TREE_CODE (newdecl) == TYPE_DECL
1668 && newtype == DECL_ORIGINAL_TYPE (newdecl))
1671 if (TREE_CODE (newdecl) == VAR_DECL)
1673 DECL_THIS_EXTERN (newdecl) |= DECL_THIS_EXTERN (olddecl);
1674 DECL_INITIALIZED_P (newdecl) |= DECL_INITIALIZED_P (olddecl);
1675 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (newdecl)
1676 |= DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (olddecl);
1679 /* Do this after calling `merge_types' so that default
1680 parameters don't confuse us. */
1681 else if (TREE_CODE (newdecl) == FUNCTION_DECL
1682 && (TYPE_RAISES_EXCEPTIONS (TREE_TYPE (newdecl))
1683 != TYPE_RAISES_EXCEPTIONS (TREE_TYPE (olddecl))))
1685 TREE_TYPE (newdecl) = build_exception_variant (newtype,
1686 TYPE_RAISES_EXCEPTIONS (TREE_TYPE (newdecl)));
1687 TREE_TYPE (olddecl) = build_exception_variant (newtype,
1688 TYPE_RAISES_EXCEPTIONS (oldtype));
1690 if ((pedantic || ! DECL_IN_SYSTEM_HEADER (olddecl))
1691 && ! DECL_IS_BUILTIN (olddecl)
1693 && !comp_except_specs (TYPE_RAISES_EXCEPTIONS (TREE_TYPE (newdecl)),
1694 TYPE_RAISES_EXCEPTIONS (TREE_TYPE (olddecl)), 1))
1696 error ("declaration of %qF throws different exceptions",
1698 cp_error_at ("than previous declaration %qF", olddecl);
1701 TREE_TYPE (newdecl) = TREE_TYPE (olddecl) = newtype;
1703 /* Lay the type out, unless already done. */
1704 if (! same_type_p (newtype, oldtype)
1705 && TREE_TYPE (newdecl) != error_mark_node
1706 && !(processing_template_decl && uses_template_parms (newdecl)))
1707 layout_type (TREE_TYPE (newdecl));
1709 if ((TREE_CODE (newdecl) == VAR_DECL
1710 || TREE_CODE (newdecl) == PARM_DECL
1711 || TREE_CODE (newdecl) == RESULT_DECL
1712 || TREE_CODE (newdecl) == FIELD_DECL
1713 || TREE_CODE (newdecl) == TYPE_DECL)
1714 && !(processing_template_decl && uses_template_parms (newdecl)))
1715 layout_decl (newdecl, 0);
1717 /* Merge the type qualifiers. */
1718 if (TREE_READONLY (newdecl))
1719 TREE_READONLY (olddecl) = 1;
1720 if (TREE_THIS_VOLATILE (newdecl))
1721 TREE_THIS_VOLATILE (olddecl) = 1;
1722 if (TREE_NOTHROW (newdecl))
1723 TREE_NOTHROW (olddecl) = 1;
1725 /* Merge deprecatedness. */
1726 if (TREE_DEPRECATED (newdecl))
1727 TREE_DEPRECATED (olddecl) = 1;
1729 /* Merge the initialization information. */
1730 if (DECL_INITIAL (newdecl) == NULL_TREE
1731 && DECL_INITIAL (olddecl) != NULL_TREE)
1733 DECL_INITIAL (newdecl) = DECL_INITIAL (olddecl);
1734 DECL_SOURCE_LOCATION (newdecl) = DECL_SOURCE_LOCATION (olddecl);
1735 if (CAN_HAVE_FULL_LANG_DECL_P (newdecl)
1736 && DECL_LANG_SPECIFIC (newdecl)
1737 && DECL_LANG_SPECIFIC (olddecl))
1739 DECL_SAVED_TREE (newdecl) = DECL_SAVED_TREE (olddecl);
1740 DECL_STRUCT_FUNCTION (newdecl) = DECL_STRUCT_FUNCTION (olddecl);
1744 /* Merge the section attribute.
1745 We want to issue an error if the sections conflict but that must be
1746 done later in decl_attributes since we are called before attributes
1748 if (DECL_SECTION_NAME (newdecl) == NULL_TREE)
1749 DECL_SECTION_NAME (newdecl) = DECL_SECTION_NAME (olddecl);
1751 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1753 DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (newdecl)
1754 |= DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (olddecl);
1755 DECL_NO_LIMIT_STACK (newdecl) |= DECL_NO_LIMIT_STACK (olddecl);
1756 TREE_THIS_VOLATILE (newdecl) |= TREE_THIS_VOLATILE (olddecl);
1757 TREE_READONLY (newdecl) |= TREE_READONLY (olddecl);
1758 TREE_NOTHROW (newdecl) |= TREE_NOTHROW (olddecl);
1759 DECL_IS_MALLOC (newdecl) |= DECL_IS_MALLOC (olddecl);
1760 DECL_IS_PURE (newdecl) |= DECL_IS_PURE (olddecl);
1761 /* Keep the old RTL. */
1762 COPY_DECL_RTL (olddecl, newdecl);
1764 else if (TREE_CODE (newdecl) == VAR_DECL
1765 && (DECL_SIZE (olddecl) || !DECL_SIZE (newdecl)))
1767 /* Keep the old RTL. We cannot keep the old RTL if the old
1768 declaration was for an incomplete object and the new
1769 declaration is not since many attributes of the RTL will
1771 COPY_DECL_RTL (olddecl, newdecl);
1774 /* If cannot merge, then use the new type and qualifiers,
1775 and don't preserve the old rtl. */
1778 /* Clean out any memory we had of the old declaration. */
1779 tree oldstatic = value_member (olddecl, static_aggregates);
1781 TREE_VALUE (oldstatic) = error_mark_node;
1783 TREE_TYPE (olddecl) = TREE_TYPE (newdecl);
1784 TREE_READONLY (olddecl) = TREE_READONLY (newdecl);
1785 TREE_THIS_VOLATILE (olddecl) = TREE_THIS_VOLATILE (newdecl);
1786 TREE_SIDE_EFFECTS (olddecl) = TREE_SIDE_EFFECTS (newdecl);
1789 /* Merge the storage class information. */
1790 merge_weak (newdecl, olddecl);
1792 DECL_ONE_ONLY (newdecl) |= DECL_ONE_ONLY (olddecl);
1793 DECL_DEFER_OUTPUT (newdecl) |= DECL_DEFER_OUTPUT (olddecl);
1794 TREE_PUBLIC (newdecl) = TREE_PUBLIC (olddecl);
1795 TREE_STATIC (olddecl) = TREE_STATIC (newdecl) |= TREE_STATIC (olddecl);
1796 if (! DECL_EXTERNAL (olddecl))
1797 DECL_EXTERNAL (newdecl) = 0;
1799 if (DECL_LANG_SPECIFIC (newdecl) && DECL_LANG_SPECIFIC (olddecl))
1801 DECL_INTERFACE_KNOWN (newdecl) |= DECL_INTERFACE_KNOWN (olddecl);
1802 DECL_NOT_REALLY_EXTERN (newdecl) |= DECL_NOT_REALLY_EXTERN (olddecl);
1803 DECL_COMDAT (newdecl) |= DECL_COMDAT (olddecl);
1804 DECL_TEMPLATE_INSTANTIATED (newdecl)
1805 |= DECL_TEMPLATE_INSTANTIATED (olddecl);
1806 /* Don't really know how much of the language-specific
1807 values we should copy from old to new. */
1808 DECL_IN_AGGR_P (newdecl) = DECL_IN_AGGR_P (olddecl);
1809 DECL_LANG_SPECIFIC (newdecl)->decl_flags.u2 =
1810 DECL_LANG_SPECIFIC (olddecl)->decl_flags.u2;
1811 DECL_NONCONVERTING_P (newdecl) = DECL_NONCONVERTING_P (olddecl);
1812 DECL_REPO_AVAILABLE_P (newdecl) = DECL_REPO_AVAILABLE_P (olddecl);
1813 DECL_TEMPLATE_INFO (newdecl) = DECL_TEMPLATE_INFO (olddecl);
1814 DECL_INITIALIZED_IN_CLASS_P (newdecl)
1815 |= DECL_INITIALIZED_IN_CLASS_P (olddecl);
1816 olddecl_friend = DECL_FRIEND_P (olddecl);
1818 /* Only functions have DECL_BEFRIENDING_CLASSES. */
1819 if (TREE_CODE (newdecl) == FUNCTION_DECL
1820 || DECL_FUNCTION_TEMPLATE_P (newdecl))
1822 DECL_BEFRIENDING_CLASSES (newdecl)
1823 = chainon (DECL_BEFRIENDING_CLASSES (newdecl),
1824 DECL_BEFRIENDING_CLASSES (olddecl));
1825 /* DECL_THUNKS is only valid for virtual functions,
1826 otherwise it is a DECL_FRIEND_CONTEXT. */
1827 if (DECL_VIRTUAL_P (newdecl))
1828 DECL_THUNKS (newdecl) = DECL_THUNKS (olddecl);
1832 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1834 if (DECL_TEMPLATE_INSTANTIATION (olddecl)
1835 && !DECL_TEMPLATE_INSTANTIATION (newdecl))
1837 /* If newdecl is not a specialization, then it is not a
1838 template-related function at all. And that means that we
1839 should have exited above, returning 0. */
1840 gcc_assert (DECL_TEMPLATE_SPECIALIZATION (newdecl));
1842 if (TREE_USED (olddecl))
1843 /* From [temp.expl.spec]:
1845 If a template, a member template or the member of a class
1846 template is explicitly specialized then that
1847 specialization shall be declared before the first use of
1848 that specialization that would cause an implicit
1849 instantiation to take place, in every translation unit in
1850 which such a use occurs. */
1851 error ("explicit specialization of %qD after first use",
1854 SET_DECL_TEMPLATE_SPECIALIZATION (olddecl);
1856 /* [temp.expl.spec/14] We don't inline explicit specialization
1857 just because the primary template says so. */
1861 if (DECL_PENDING_INLINE_INFO (newdecl) == 0)
1862 DECL_PENDING_INLINE_INFO (newdecl) = DECL_PENDING_INLINE_INFO (olddecl);
1864 DECL_DECLARED_INLINE_P (newdecl) |= DECL_DECLARED_INLINE_P (olddecl);
1866 /* If either decl says `inline', this fn is inline, unless
1867 its definition was passed already. */
1868 if (DECL_INLINE (newdecl) && DECL_INITIAL (olddecl) == NULL_TREE)
1869 DECL_INLINE (olddecl) = 1;
1870 DECL_INLINE (newdecl) = DECL_INLINE (olddecl);
1872 DECL_UNINLINABLE (newdecl) = DECL_UNINLINABLE (olddecl)
1873 = (DECL_UNINLINABLE (newdecl) || DECL_UNINLINABLE (olddecl));
1876 /* Preserve abstractness on cloned [cd]tors. */
1877 DECL_ABSTRACT (newdecl) = DECL_ABSTRACT (olddecl);
1881 SET_DECL_LANGUAGE (olddecl, DECL_LANGUAGE (newdecl));
1882 COPY_DECL_ASSEMBLER_NAME (newdecl, olddecl);
1883 COPY_DECL_RTL (newdecl, olddecl);
1885 if (! types_match || new_defines_function)
1887 /* These need to be copied so that the names are available.
1888 Note that if the types do match, we'll preserve inline
1889 info and other bits, but if not, we won't. */
1890 DECL_ARGUMENTS (olddecl) = DECL_ARGUMENTS (newdecl);
1891 DECL_RESULT (olddecl) = DECL_RESULT (newdecl);
1893 if (new_defines_function)
1894 /* If defining a function declared with other language
1895 linkage, use the previously declared language linkage. */
1896 SET_DECL_LANGUAGE (newdecl, DECL_LANGUAGE (olddecl));
1897 else if (types_match)
1899 /* If redeclaring a builtin function, and not a definition,
1900 it stays built in. */
1901 if (DECL_BUILT_IN (olddecl))
1903 DECL_BUILT_IN_CLASS (newdecl) = DECL_BUILT_IN_CLASS (olddecl);
1904 DECL_FUNCTION_CODE (newdecl) = DECL_FUNCTION_CODE (olddecl);
1905 /* If we're keeping the built-in definition, keep the rtl,
1906 regardless of declaration matches. */
1907 COPY_DECL_RTL (olddecl, newdecl);
1910 DECL_RESULT (newdecl) = DECL_RESULT (olddecl);
1911 /* Don't clear out the arguments if we're redefining a function. */
1912 if (DECL_ARGUMENTS (olddecl))
1913 DECL_ARGUMENTS (newdecl) = DECL_ARGUMENTS (olddecl);
1916 else if (TREE_CODE (newdecl) == NAMESPACE_DECL)
1917 NAMESPACE_LEVEL (newdecl) = NAMESPACE_LEVEL (olddecl);
1919 /* Now preserve various other info from the definition. */
1920 TREE_ADDRESSABLE (newdecl) = TREE_ADDRESSABLE (olddecl);
1921 TREE_ASM_WRITTEN (newdecl) = TREE_ASM_WRITTEN (olddecl);
1922 DECL_COMMON (newdecl) = DECL_COMMON (olddecl);
1923 COPY_DECL_ASSEMBLER_NAME (olddecl, newdecl);
1925 /* Warn about conflicting visibility specifications. */
1926 if (DECL_VISIBILITY_SPECIFIED (olddecl)
1927 && DECL_VISIBILITY_SPECIFIED (newdecl)
1928 && DECL_VISIBILITY (newdecl) != DECL_VISIBILITY (olddecl))
1930 warning ("%J%qD: visibility attribute ignored because it",
1932 warning ("%Jconflicts with previous declaration here", olddecl);
1934 /* Choose the declaration which specified visibility. */
1935 if (DECL_VISIBILITY_SPECIFIED (olddecl))
1937 DECL_VISIBILITY (newdecl) = DECL_VISIBILITY (olddecl);
1938 DECL_VISIBILITY_SPECIFIED (newdecl) = 1;
1941 /* The DECL_LANG_SPECIFIC information in OLDDECL will be replaced
1942 with that from NEWDECL below. */
1943 if (DECL_LANG_SPECIFIC (olddecl))
1945 gcc_assert (DECL_LANG_SPECIFIC (olddecl)
1946 != DECL_LANG_SPECIFIC (newdecl));
1947 ggc_free (DECL_LANG_SPECIFIC (olddecl));
1950 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1954 function_size = sizeof (struct tree_decl);
1956 memcpy ((char *) olddecl + sizeof (struct tree_common),
1957 (char *) newdecl + sizeof (struct tree_common),
1958 function_size - sizeof (struct tree_common));
1960 if (DECL_TEMPLATE_INSTANTIATION (newdecl))
1961 /* If newdecl is a template instantiation, it is possible that
1962 the following sequence of events has occurred:
1964 o A friend function was declared in a class template. The
1965 class template was instantiated.
1967 o The instantiation of the friend declaration was
1968 recorded on the instantiation list, and is newdecl.
1970 o Later, however, instantiate_class_template called pushdecl
1971 on the newdecl to perform name injection. But, pushdecl in
1972 turn called duplicate_decls when it discovered that another
1973 declaration of a global function with the same name already
1976 o Here, in duplicate_decls, we decided to clobber newdecl.
1978 If we're going to do that, we'd better make sure that
1979 olddecl, and not newdecl, is on the list of
1980 instantiations so that if we try to do the instantiation
1981 again we won't get the clobbered declaration. */
1982 reregister_specialization (newdecl,
1983 DECL_TI_TEMPLATE (newdecl),
1988 memcpy ((char *) olddecl + sizeof (struct tree_common),
1989 (char *) newdecl + sizeof (struct tree_common),
1990 sizeof (struct tree_decl) - sizeof (struct tree_common)
1991 + TREE_CODE_LENGTH (TREE_CODE (newdecl)) * sizeof (char *));
1994 DECL_UID (olddecl) = olddecl_uid;
1996 DECL_FRIEND_P (olddecl) = 1;
1998 /* NEWDECL contains the merged attribute lists.
1999 Update OLDDECL to be the same. */
2000 DECL_ATTRIBUTES (olddecl) = DECL_ATTRIBUTES (newdecl);
2002 /* If OLDDECL had its DECL_RTL instantiated, re-invoke make_decl_rtl
2003 so that encode_section_info has a chance to look at the new decl
2004 flags and attributes. */
2005 if (DECL_RTL_SET_P (olddecl)
2006 && (TREE_CODE (olddecl) == FUNCTION_DECL
2007 || (TREE_CODE (olddecl) == VAR_DECL
2008 && TREE_STATIC (olddecl))))
2009 make_decl_rtl (olddecl);
2011 /* The NEWDECL will no longer be needed. Because every out-of-class
2012 declaration of a member results in a call to duplicate_decls,
2013 freeing these nodes represents in a significant savings. */
2019 /* Return zero if the declaration NEWDECL is valid
2020 when the declaration OLDDECL (assumed to be for the same name)
2021 has already been seen.
2022 Otherwise return an error message format string with a %s
2023 where the identifier should go. */
2026 redeclaration_error_message (tree newdecl, tree olddecl)
2028 if (TREE_CODE (newdecl) == TYPE_DECL)
2030 /* Because C++ can put things into name space for free,
2031 constructs like "typedef struct foo { ... } foo"
2032 would look like an erroneous redeclaration. */
2033 if (same_type_p (TREE_TYPE (newdecl), TREE_TYPE (olddecl)))
2036 return "redefinition of %q#D";
2038 else if (TREE_CODE (newdecl) == FUNCTION_DECL)
2040 /* If this is a pure function, its olddecl will actually be
2041 the original initialization to `0' (which we force to call
2042 abort()). Don't complain about redefinition in this case. */
2043 if (DECL_LANG_SPECIFIC (olddecl) && DECL_PURE_VIRTUAL_P (olddecl))
2046 /* If both functions come from different namespaces, this is not
2047 a redeclaration - this is a conflict with a used function. */
2048 if (DECL_NAMESPACE_SCOPE_P (olddecl)
2049 && DECL_CONTEXT (olddecl) != DECL_CONTEXT (newdecl))
2050 return "%qD conflicts with used function";
2052 /* We'll complain about linkage mismatches in
2053 warn_extern_redeclared_static. */
2055 /* Defining the same name twice is no good. */
2056 if (DECL_INITIAL (olddecl) != NULL_TREE
2057 && DECL_INITIAL (newdecl) != NULL_TREE)
2059 if (DECL_NAME (olddecl) == NULL_TREE)
2060 return "%q#D not declared in class";
2062 return "redefinition of %q#D";
2066 else if (TREE_CODE (newdecl) == TEMPLATE_DECL)
2070 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == TYPE_DECL)
2072 if (COMPLETE_TYPE_P (TREE_TYPE (newdecl))
2073 && COMPLETE_TYPE_P (TREE_TYPE (olddecl)))
2074 return "redefinition of %q#D";
2078 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) != FUNCTION_DECL
2079 || (DECL_TEMPLATE_RESULT (newdecl)
2080 == DECL_TEMPLATE_RESULT (olddecl)))
2083 nt = DECL_TEMPLATE_RESULT (newdecl);
2084 if (DECL_TEMPLATE_INFO (nt))
2085 nt = DECL_TEMPLATE_RESULT (template_for_substitution (nt));
2086 ot = DECL_TEMPLATE_RESULT (olddecl);
2087 if (DECL_TEMPLATE_INFO (ot))
2088 ot = DECL_TEMPLATE_RESULT (template_for_substitution (ot));
2089 if (DECL_INITIAL (nt) && DECL_INITIAL (ot))
2090 return "redefinition of %q#D";
2094 else if (toplevel_bindings_p () || DECL_NAMESPACE_SCOPE_P (newdecl))
2096 /* Objects declared at top level: */
2097 /* If at least one is a reference, it's ok. */
2098 if (DECL_EXTERNAL (newdecl) || DECL_EXTERNAL (olddecl))
2100 /* Reject two definitions. */
2101 return "redefinition of %q#D";
2105 /* Objects declared with block scope: */
2106 /* Reject two definitions, and reject a definition
2107 together with an external reference. */
2108 if (!(DECL_EXTERNAL (newdecl) && DECL_EXTERNAL (olddecl)))
2109 return "redeclaration of %q#D";
2114 /* Create a new label, named ID. */
2117 make_label_decl (tree id, int local_p)
2121 decl = build_decl (LABEL_DECL, id, void_type_node);
2123 DECL_CONTEXT (decl) = current_function_decl;
2124 DECL_MODE (decl) = VOIDmode;
2125 C_DECLARED_LABEL_FLAG (decl) = local_p;
2127 /* Say where one reference is to the label, for the sake of the
2128 error if it is not defined. */
2129 DECL_SOURCE_LOCATION (decl) = input_location;
2131 /* Record the fact that this identifier is bound to this label. */
2132 SET_IDENTIFIER_LABEL_VALUE (id, decl);
2137 /* Record this label on the list of used labels so that we can check
2138 at the end of the function to see whether or not the label was
2139 actually defined, and so we can check when the label is defined whether
2140 this use is valid. */
2143 use_label (tree decl)
2145 if (named_label_uses == NULL
2146 || named_label_uses->names_in_scope != current_binding_level->names
2147 || named_label_uses->label_decl != decl)
2149 struct named_label_use_list *new_ent;
2150 new_ent = GGC_NEW (struct named_label_use_list);
2151 new_ent->label_decl = decl;
2152 new_ent->names_in_scope = current_binding_level->names;
2153 new_ent->binding_level = current_binding_level;
2154 new_ent->o_goto_locus = input_location;
2155 new_ent->next = named_label_uses;
2156 named_label_uses = new_ent;
2160 /* Look for a label named ID in the current function. If one cannot
2161 be found, create one. (We keep track of used, but undefined,
2162 labels, and complain about them at the end of a function.) */
2165 lookup_label (tree id)
2168 struct named_label_list *ent;
2170 timevar_push (TV_NAME_LOOKUP);
2171 /* You can't use labels at global scope. */
2172 if (current_function_decl == NULL_TREE)
2174 error ("label %qE referenced outside of any function", id);
2175 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, NULL_TREE);
2178 /* See if we've already got this label. */
2179 decl = IDENTIFIER_LABEL_VALUE (id);
2180 if (decl != NULL_TREE && DECL_CONTEXT (decl) == current_function_decl)
2181 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, decl);
2183 /* Record this label on the list of labels used in this function.
2184 We do this before calling make_label_decl so that we get the
2185 IDENTIFIER_LABEL_VALUE before the new label is declared. */
2186 ent = GGC_CNEW (struct named_label_list);
2187 ent->old_value = IDENTIFIER_LABEL_VALUE (id);
2188 ent->next = named_labels;
2191 /* We need a new label. */
2192 decl = make_label_decl (id, /*local_p=*/0);
2194 /* Now fill in the information we didn't have before. */
2195 ent->label_decl = decl;
2197 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, decl);
2200 /* Declare a local label named ID. */
2203 declare_local_label (tree id)
2207 /* Add a new entry to the SHADOWED_LABELS list so that when we leave
2208 this scope we can restore the old value of
2209 IDENTIFIER_TYPE_VALUE. */
2210 current_binding_level->shadowed_labels
2211 = tree_cons (IDENTIFIER_LABEL_VALUE (id), NULL_TREE,
2212 current_binding_level->shadowed_labels);
2213 /* Look for the label. */
2214 decl = make_label_decl (id, /*local_p=*/1);
2215 /* Now fill in the information we didn't have before. */
2216 TREE_VALUE (current_binding_level->shadowed_labels) = decl;
2221 /* Returns nonzero if it is ill-formed to jump past the declaration of
2222 DECL. Returns 2 if it's also a real problem. */
2225 decl_jump_unsafe (tree decl)
2227 if (TREE_CODE (decl) != VAR_DECL || TREE_STATIC (decl))
2230 if (DECL_INITIAL (decl) == NULL_TREE
2231 && pod_type_p (TREE_TYPE (decl)))
2234 /* This is really only important if we're crossing an initialization.
2235 The POD stuff is just pedantry; why should it matter if the class
2236 contains a field of pointer to member type? */
2237 if (DECL_INITIAL (decl)
2238 || (TYPE_NEEDS_CONSTRUCTING (TREE_TYPE (decl))))
2243 /* Check that a single previously seen jump to a newly defined label
2244 is OK. DECL is the LABEL_DECL or 0; LEVEL is the binding_level for
2245 the jump context; NAMES are the names in scope in LEVEL at the jump
2246 context; FILE and LINE are the source position of the jump or 0. */
2249 check_previous_goto_1 (tree decl,
2250 struct cp_binding_level* level,
2251 tree names, const location_t *locus)
2255 struct cp_binding_level *b = current_binding_level;
2256 for (; b; b = b->level_chain)
2258 tree new_decls = b->names;
2259 tree old_decls = (b == level ? names : NULL_TREE);
2260 for (; new_decls != old_decls;
2261 new_decls = TREE_CHAIN (new_decls))
2263 int problem = decl_jump_unsafe (new_decls);
2270 pedwarn ("jump to label %qD", decl);
2272 pedwarn ("jump to case label");
2275 pedwarn ("%H from here", locus);
2280 cp_error_at (" crosses initialization of %q#D",
2283 cp_pedwarn_at (" enters scope of non-POD %q#D",
2289 if ((b->kind == sk_try || b->kind == sk_catch) && ! saw_eh)
2294 pedwarn ("jump to label %qD", decl);
2296 pedwarn ("jump to case label");
2299 pedwarn ("%H from here", locus);
2302 if (b->kind == sk_try)
2303 error (" enters try block");
2305 error (" enters catch block");
2312 check_previous_goto (struct named_label_use_list* use)
2314 check_previous_goto_1 (use->label_decl, use->binding_level,
2315 use->names_in_scope, &use->o_goto_locus);
2319 check_switch_goto (struct cp_binding_level* level)
2321 check_previous_goto_1 (NULL_TREE, level, level->names, NULL);
2324 /* Check that any previously seen jumps to a newly defined label DECL
2325 are OK. Called by define_label. */
2328 check_previous_gotos (tree decl)
2330 struct named_label_use_list **usep;
2332 if (! TREE_USED (decl))
2335 for (usep = &named_label_uses; *usep; )
2337 struct named_label_use_list *use = *usep;
2338 if (use->label_decl == decl)
2340 check_previous_goto (use);
2344 usep = &(use->next);
2348 /* Check that a new jump to a label DECL is OK. Called by
2349 finish_goto_stmt. */
2352 check_goto (tree decl)
2356 struct named_label_list *lab;
2358 /* We can't know where a computed goto is jumping. So we assume
2360 if (! DECL_P (decl))
2363 /* If the label hasn't been defined yet, defer checking. */
2364 if (! DECL_INITIAL (decl))
2370 for (lab = named_labels; lab; lab = lab->next)
2371 if (decl == lab->label_decl)
2374 /* If the label is not on named_labels it's a gcc local label, so
2375 it must be in an outer scope, so jumping to it is always OK. */
2379 if ((lab->in_try_scope || lab->in_catch_scope || lab->bad_decls)
2382 cp_pedwarn_at ("jump to label %qD", decl);
2383 pedwarn (" from here");
2387 for (bad = lab->bad_decls; bad; bad = TREE_CHAIN (bad))
2389 tree b = TREE_VALUE (bad);
2390 int u = decl_jump_unsafe (b);
2392 if (u > 1 && DECL_ARTIFICIAL (b))
2393 /* Can't skip init of __exception_info. */
2394 error ("%J enters catch block", b);
2396 cp_error_at (" skips initialization of %q#D", b);
2398 cp_pedwarn_at (" enters scope of non-POD %q#D", b);
2401 if (lab->in_try_scope)
2402 error (" enters try block");
2403 else if (lab->in_catch_scope)
2404 error (" enters catch block");
2407 /* Define a label, specifying the location in the source file.
2408 Return the LABEL_DECL node for the label. */
2411 define_label (location_t location, tree name)
2413 tree decl = lookup_label (name);
2414 struct named_label_list *ent;
2415 struct cp_binding_level *p;
2417 timevar_push (TV_NAME_LOOKUP);
2418 for (ent = named_labels; ent; ent = ent->next)
2419 if (ent->label_decl == decl)
2422 /* After labels, make any new cleanups in the function go into their
2423 own new (temporary) binding contour. */
2424 for (p = current_binding_level;
2425 p->kind != sk_function_parms;
2427 p->more_cleanups_ok = 0;
2429 if (name == get_identifier ("wchar_t"))
2430 pedwarn ("label named wchar_t");
2432 if (DECL_INITIAL (decl) != NULL_TREE)
2433 error ("duplicate label %qD", decl);
2436 /* Mark label as having been defined. */
2437 DECL_INITIAL (decl) = error_mark_node;
2438 /* Say where in the source. */
2439 DECL_SOURCE_LOCATION (decl) = location;
2442 ent->names_in_scope = current_binding_level->names;
2443 ent->binding_level = current_binding_level;
2445 check_previous_gotos (decl);
2448 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, decl);
2453 struct cp_binding_level *level;
2454 struct cp_switch *next;
2455 /* The SWITCH_STMT being built. */
2457 /* A splay-tree mapping the low element of a case range to the high
2458 element, or NULL_TREE if there is no high element. Used to
2459 determine whether or not a new case label duplicates an old case
2460 label. We need a tree, rather than simply a hash table, because
2461 of the GNU case range extension. */
2465 /* A stack of the currently active switch statements. The innermost
2466 switch statement is on the top of the stack. There is no need to
2467 mark the stack for garbage collection because it is only active
2468 during the processing of the body of a function, and we never
2469 collect at that point. */
2471 static struct cp_switch *switch_stack;
2473 /* Called right after a switch-statement condition is parsed.
2474 SWITCH_STMT is the switch statement being parsed. */
2477 push_switch (tree switch_stmt)
2479 struct cp_switch *p = xmalloc (sizeof (struct cp_switch));
2480 p->level = current_binding_level;
2481 p->next = switch_stack;
2482 p->switch_stmt = switch_stmt;
2483 p->cases = splay_tree_new (case_compare, NULL, NULL);
2490 struct cp_switch *cs = switch_stack;
2492 /* Emit warnings as needed. */
2493 c_do_switch_warnings (cs->cases, cs->switch_stmt);
2495 splay_tree_delete (cs->cases);
2496 switch_stack = switch_stack->next;
2500 /* Note that we've seen a definition of a case label, and complain if this
2501 is a bad place for one. */
2504 finish_case_label (tree low_value, tree high_value)
2507 struct cp_binding_level *p;
2509 if (processing_template_decl)
2513 /* For templates, just add the case label; we'll do semantic
2514 analysis at instantiation-time. */
2515 label = build_decl (LABEL_DECL, NULL_TREE, NULL_TREE);
2516 return add_stmt (build_case_label (low_value, high_value, label));
2519 /* Find the condition on which this switch statement depends. */
2520 cond = SWITCH_COND (switch_stack->switch_stmt);
2521 if (cond && TREE_CODE (cond) == TREE_LIST)
2522 cond = TREE_VALUE (cond);
2524 r = c_add_case_label (switch_stack->cases, cond, TREE_TYPE (cond),
2525 low_value, high_value);
2527 check_switch_goto (switch_stack->level);
2529 /* After labels, make any new cleanups in the function go into their
2530 own new (temporary) binding contour. */
2531 for (p = current_binding_level;
2532 p->kind != sk_function_parms;
2534 p->more_cleanups_ok = 0;
2539 /* Hash a TYPENAME_TYPE. K is really of type `tree'. */
2542 typename_hash (const void* k)
2547 hash = (htab_hash_pointer (TYPE_CONTEXT (t))
2548 ^ htab_hash_pointer (DECL_NAME (TYPE_NAME (t))));
2553 typedef struct typename_info {
2561 /* Compare two TYPENAME_TYPEs. K1 and K2 are really of type `tree'. */
2564 typename_compare (const void * k1, const void * k2)
2567 const typename_info *t2;
2570 t2 = (const typename_info *) k2;
2572 return (DECL_NAME (TYPE_NAME (t1)) == t2->name
2573 && TYPE_CONTEXT (t1) == t2->scope
2574 && TYPENAME_TYPE_FULLNAME (t1) == t2->template_id
2575 && TYPENAME_IS_ENUM_P (t1) == t2->enum_p
2576 && TYPENAME_IS_CLASS_P (t1) == t2->class_p);
2579 /* Build a TYPENAME_TYPE. If the type is `typename T::t', CONTEXT is
2580 the type of `T', NAME is the IDENTIFIER_NODE for `t'.
2582 Returns the new TYPENAME_TYPE. */
2584 static GTY ((param_is (union tree_node))) htab_t typename_htab;
2587 build_typename_type (tree context, tree name, tree fullname,
2588 enum tag_types tag_type)
2596 if (typename_htab == NULL)
2597 typename_htab = htab_create_ggc (61, &typename_hash,
2598 &typename_compare, NULL);
2600 ti.scope = FROB_CONTEXT (context);
2602 ti.template_id = fullname;
2603 ti.enum_p = tag_type == enum_type;
2604 ti.class_p = (tag_type == class_type
2605 || tag_type == record_type
2606 || tag_type == union_type);
2607 hash = (htab_hash_pointer (ti.scope)
2608 ^ htab_hash_pointer (ti.name));
2610 /* See if we already have this type. */
2611 e = htab_find_slot_with_hash (typename_htab, &ti, hash, INSERT);
2616 /* Build the TYPENAME_TYPE. */
2617 t = make_aggr_type (TYPENAME_TYPE);
2618 TYPE_CONTEXT (t) = ti.scope;
2619 TYPENAME_TYPE_FULLNAME (t) = ti.template_id;
2620 TYPENAME_IS_ENUM_P (t) = ti.enum_p;
2621 TYPENAME_IS_CLASS_P (t) = ti.class_p;
2623 /* Build the corresponding TYPE_DECL. */
2624 d = build_decl (TYPE_DECL, name, t);
2625 TYPE_NAME (TREE_TYPE (d)) = d;
2626 TYPE_STUB_DECL (TREE_TYPE (d)) = d;
2627 DECL_CONTEXT (d) = FROB_CONTEXT (context);
2628 DECL_ARTIFICIAL (d) = 1;
2630 /* Store it in the hash table. */
2637 /* Resolve `typename CONTEXT::NAME'. TAG_TYPE indicates the tag
2638 provided to name the type. Returns an appropriate type, unless an
2639 error occurs, in which case error_mark_node is returned. If we
2640 locate a non-artificial TYPE_DECL and TF_KEEP_TYPE_DECL is set, we
2641 return that, rather than the _TYPE it corresponds to, in other
2642 cases we look through the type decl. If TF_ERROR is set, complain
2643 about errors, otherwise be quiet. */
2646 make_typename_type (tree context, tree name, enum tag_types tag_type,
2647 tsubst_flags_t complain)
2651 if (name == error_mark_node
2652 || context == NULL_TREE
2653 || context == error_mark_node)
2654 return error_mark_node;
2658 if (!(TYPE_LANG_SPECIFIC (name)
2659 && (CLASSTYPE_IS_TEMPLATE (name)
2660 || CLASSTYPE_USE_TEMPLATE (name))))
2661 name = TYPE_IDENTIFIER (name);
2663 /* Create a TEMPLATE_ID_EXPR for the type. */
2664 name = build_nt (TEMPLATE_ID_EXPR,
2665 CLASSTYPE_TI_TEMPLATE (name),
2666 CLASSTYPE_TI_ARGS (name));
2668 else if (TREE_CODE (name) == TYPE_DECL)
2669 name = DECL_NAME (name);
2673 if (TREE_CODE (name) == TEMPLATE_ID_EXPR)
2675 name = TREE_OPERAND (name, 0);
2676 if (TREE_CODE (name) == TEMPLATE_DECL)
2677 name = TREE_OPERAND (fullname, 0) = DECL_NAME (name);
2679 if (TREE_CODE (name) == TEMPLATE_DECL)
2681 error ("%qD used without template parameters", name);
2682 return error_mark_node;
2684 gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE);
2685 gcc_assert (TYPE_P (context));
2687 if (!dependent_type_p (context)
2688 || currently_open_class (context))
2690 if (TREE_CODE (fullname) == TEMPLATE_ID_EXPR)
2692 tree tmpl = NULL_TREE;
2693 if (IS_AGGR_TYPE (context))
2694 tmpl = lookup_field (context, name, 0, false);
2695 if (!tmpl || !DECL_CLASS_TEMPLATE_P (tmpl))
2697 if (complain & tf_error)
2698 error ("no class template named %q#T in %q#T",
2700 return error_mark_node;
2703 if (complain & tf_error)
2704 perform_or_defer_access_check (TYPE_BINFO (context), tmpl);
2706 return lookup_template_class (tmpl,
2707 TREE_OPERAND (fullname, 1),
2709 /*entering_scope=*/0,
2710 tf_error | tf_warning | tf_user);
2716 if (!IS_AGGR_TYPE (context))
2718 if (complain & tf_error)
2719 error ("no type named %q#T in %q#T", name, context);
2720 return error_mark_node;
2723 t = lookup_field (context, name, 0, true);
2726 if (TREE_CODE (t) != TYPE_DECL)
2728 if (complain & tf_error)
2729 error ("no type named %q#T in %q#T", name, context);
2730 return error_mark_node;
2733 if (complain & tf_error)
2734 perform_or_defer_access_check (TYPE_BINFO (context), t);
2736 if (DECL_ARTIFICIAL (t) || !(complain & tf_keep_type_decl))
2744 /* If the CONTEXT is not a template type, then either the field is
2745 there now or its never going to be. */
2746 if (!dependent_type_p (context))
2748 if (complain & tf_error)
2749 error ("no type named %q#T in %q#T", name, context);
2750 return error_mark_node;
2753 return build_typename_type (context, name, fullname, tag_type);
2756 /* Resolve `CONTEXT::template NAME'. Returns a TEMPLATE_DECL if the name
2757 can be resolved or an UNBOUND_CLASS_TEMPLATE, unless an error occurs,
2758 in which case error_mark_node is returned.
2760 If PARM_LIST is non-NULL, also make sure that the template parameter
2761 list of TEMPLATE_DECL matches.
2763 If COMPLAIN zero, don't complain about any errors that occur. */
2766 make_unbound_class_template (tree context, tree name, tree parm_list,
2767 tsubst_flags_t complain)
2773 name = TYPE_IDENTIFIER (name);
2774 else if (DECL_P (name))
2775 name = DECL_NAME (name);
2776 gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE);
2778 if (!dependent_type_p (context)
2779 || currently_open_class (context))
2781 tree tmpl = NULL_TREE;
2783 if (IS_AGGR_TYPE (context))
2784 tmpl = lookup_field (context, name, 0, false);
2786 if (!tmpl || !DECL_CLASS_TEMPLATE_P (tmpl))
2788 if (complain & tf_error)
2789 error ("no class template named %q#T in %q#T", name, context);
2790 return error_mark_node;
2794 && !comp_template_parms (DECL_TEMPLATE_PARMS (tmpl), parm_list))
2796 if (complain & tf_error)
2798 error ("template parameters do not match template");
2799 cp_error_at ("%qD declared here", tmpl);
2801 return error_mark_node;
2804 if (complain & tf_error)
2805 perform_or_defer_access_check (TYPE_BINFO (context), tmpl);
2810 /* Build the UNBOUND_CLASS_TEMPLATE. */
2811 t = make_aggr_type (UNBOUND_CLASS_TEMPLATE);
2812 TYPE_CONTEXT (t) = FROB_CONTEXT (context);
2813 TREE_TYPE (t) = NULL_TREE;
2815 /* Build the corresponding TEMPLATE_DECL. */
2816 d = build_decl (TEMPLATE_DECL, name, t);
2817 TYPE_NAME (TREE_TYPE (d)) = d;
2818 TYPE_STUB_DECL (TREE_TYPE (d)) = d;
2819 DECL_CONTEXT (d) = FROB_CONTEXT (context);
2820 DECL_ARTIFICIAL (d) = 1;
2821 DECL_TEMPLATE_PARMS (d) = parm_list;
2828 /* Push the declarations of builtin types into the namespace.
2829 RID_INDEX is the index of the builtin type in the array
2830 RID_POINTERS. NAME is the name used when looking up the builtin
2831 type. TYPE is the _TYPE node for the builtin type. */
2834 record_builtin_type (enum rid rid_index,
2838 tree rname = NULL_TREE, tname = NULL_TREE;
2839 tree tdecl = NULL_TREE;
2841 if ((int) rid_index < (int) RID_MAX)
2842 rname = ridpointers[(int) rid_index];
2844 tname = get_identifier (name);
2846 /* The calls to SET_IDENTIFIER_GLOBAL_VALUE below should be
2847 eliminated. Built-in types should not be looked up name; their
2848 names are keywords that the parser can recognize. However, there
2849 is code in c-common.c that uses identifier_global_value to look
2850 up built-in types by name. */
2853 tdecl = build_decl (TYPE_DECL, tname, type);
2854 DECL_ARTIFICIAL (tdecl) = 1;
2855 SET_IDENTIFIER_GLOBAL_VALUE (tname, tdecl);
2861 tdecl = build_decl (TYPE_DECL, rname, type);
2862 DECL_ARTIFICIAL (tdecl) = 1;
2864 SET_IDENTIFIER_GLOBAL_VALUE (rname, tdecl);
2867 if (!TYPE_NAME (type))
2868 TYPE_NAME (type) = tdecl;
2871 debug_hooks->type_decl (tdecl, 0);
2874 /* Record one of the standard Java types.
2875 * Declare it as having the given NAME.
2876 * If SIZE > 0, it is the size of one of the integral types;
2877 * otherwise it is the negative of the size of one of the other types. */
2880 record_builtin_java_type (const char* name, int size)
2884 type = make_signed_type (size);
2885 else if (size > -32)
2886 { /* "__java_char" or ""__java_boolean". */
2887 type = make_unsigned_type (-size);
2888 /*if (size == -1) TREE_SET_CODE (type, BOOLEAN_TYPE);*/
2891 { /* "__java_float" or ""__java_double". */
2892 type = make_node (REAL_TYPE);
2893 TYPE_PRECISION (type) = - size;
2896 record_builtin_type (RID_MAX, name, type);
2897 decl = TYPE_NAME (type);
2899 /* Suppress generate debug symbol entries for these types,
2900 since for normal C++ they are just clutter.
2901 However, push_lang_context undoes this if extern "Java" is seen. */
2902 DECL_IGNORED_P (decl) = 1;
2904 TYPE_FOR_JAVA (type) = 1;
2908 /* Push a type into the namespace so that the back-ends ignore it. */
2911 record_unknown_type (tree type, const char* name)
2913 tree decl = pushdecl (build_decl (TYPE_DECL, get_identifier (name), type));
2914 /* Make sure the "unknown type" typedecl gets ignored for debug info. */
2915 DECL_IGNORED_P (decl) = 1;
2916 TYPE_DECL_SUPPRESS_DEBUG (decl) = 1;
2917 TYPE_SIZE (type) = TYPE_SIZE (void_type_node);
2918 TYPE_ALIGN (type) = 1;
2919 TYPE_USER_ALIGN (type) = 0;
2920 TYPE_MODE (type) = TYPE_MODE (void_type_node);
2923 /* An string for which we should create an IDENTIFIER_NODE at
2926 typedef struct predefined_identifier
2928 /* The name of the identifier. */
2929 const char *const name;
2930 /* The place where the IDENTIFIER_NODE should be stored. */
2932 /* Nonzero if this is the name of a constructor or destructor. */
2933 const int ctor_or_dtor_p;
2934 } predefined_identifier;
2936 /* Create all the predefined identifiers. */
2939 initialize_predefined_identifiers (void)
2941 const predefined_identifier *pid;
2943 /* A table of identifiers to create at startup. */
2944 static const predefined_identifier predefined_identifiers[] = {
2945 { "C++", &lang_name_cplusplus, 0 },
2946 { "C", &lang_name_c, 0 },
2947 { "Java", &lang_name_java, 0 },
2948 /* Some of these names have a trailing space so that it is
2949 impossible for them to conflict with names written by users. */
2950 { "__ct ", &ctor_identifier, 1 },
2951 { "__base_ctor ", &base_ctor_identifier, 1 },
2952 { "__comp_ctor ", &complete_ctor_identifier, 1 },
2953 { "__dt ", &dtor_identifier, 1 },
2954 { "__comp_dtor ", &complete_dtor_identifier, 1 },
2955 { "__base_dtor ", &base_dtor_identifier, 1 },
2956 { "__deleting_dtor ", &deleting_dtor_identifier, 1 },
2957 { IN_CHARGE_NAME, &in_charge_identifier, 0 },
2958 { "nelts", &nelts_identifier, 0 },
2959 { THIS_NAME, &this_identifier, 0 },
2960 { VTABLE_DELTA_NAME, &delta_identifier, 0 },
2961 { VTABLE_PFN_NAME, &pfn_identifier, 0 },
2962 { "_vptr", &vptr_identifier, 0 },
2963 { "__vtt_parm", &vtt_parm_identifier, 0 },
2964 { "::", &global_scope_name, 0 },
2965 { "std", &std_identifier, 0 },
2969 for (pid = predefined_identifiers; pid->name; ++pid)
2971 *pid->node = get_identifier (pid->name);
2972 if (pid->ctor_or_dtor_p)
2973 IDENTIFIER_CTOR_OR_DTOR_P (*pid->node) = 1;
2977 /* Create the predefined scalar types of C,
2978 and some nodes representing standard constants (0, 1, (void *)0).
2979 Initialize the global binding level.
2980 Make definitions for built-in primitive functions. */
2983 cxx_init_decl_processing (void)
2986 tree void_ftype_ptr;
2988 build_common_tree_nodes (flag_signed_char, false);
2990 /* Create all the identifiers we need. */
2991 initialize_predefined_identifiers ();
2993 /* Create the global variables. */
2994 push_to_top_level ();
2996 current_function_decl = NULL_TREE;
2997 current_binding_level = NULL;
2998 /* Enter the global namespace. */
2999 gcc_assert (global_namespace == NULL_TREE);
3000 global_namespace = build_lang_decl (NAMESPACE_DECL, global_scope_name,
3002 begin_scope (sk_namespace, global_namespace);
3004 current_lang_name = NULL_TREE;
3006 /* Adjust various flags based on command-line settings. */
3007 if (!flag_permissive)
3008 flag_pedantic_errors = 1;
3009 if (!flag_no_inline)
3011 flag_inline_trees = 1;
3014 if (flag_inline_functions)
3015 flag_inline_trees = 2;
3017 /* Force minimum function alignment if using the least significant
3018 bit of function pointers to store the virtual bit. */
3019 if (TARGET_PTRMEMFUNC_VBIT_LOCATION == ptrmemfunc_vbit_in_pfn
3020 && force_align_functions_log < 1)
3021 force_align_functions_log = 1;
3024 current_lang_name = lang_name_c;
3026 error_mark_list = build_tree_list (error_mark_node, error_mark_node);
3027 TREE_TYPE (error_mark_list) = error_mark_node;
3029 /* Create the `std' namespace. */
3030 push_namespace (std_identifier);
3031 std_node = current_namespace;
3034 c_common_nodes_and_builtins ();
3036 java_byte_type_node = record_builtin_java_type ("__java_byte", 8);
3037 java_short_type_node = record_builtin_java_type ("__java_short", 16);
3038 java_int_type_node = record_builtin_java_type ("__java_int", 32);
3039 java_long_type_node = record_builtin_java_type ("__java_long", 64);
3040 java_float_type_node = record_builtin_java_type ("__java_float", -32);
3041 java_double_type_node = record_builtin_java_type ("__java_double", -64);
3042 java_char_type_node = record_builtin_java_type ("__java_char", -16);
3043 java_boolean_type_node = record_builtin_java_type ("__java_boolean", -1);
3045 integer_two_node = build_int_cst (NULL_TREE, 2);
3046 integer_three_node = build_int_cst (NULL_TREE, 3);
3048 record_builtin_type (RID_BOOL, "bool", boolean_type_node);
3049 truthvalue_type_node = boolean_type_node;
3050 truthvalue_false_node = boolean_false_node;
3051 truthvalue_true_node = boolean_true_node;
3053 empty_except_spec = build_tree_list (NULL_TREE, NULL_TREE);
3056 record_builtin_type (RID_MAX, NULL, string_type_node);
3059 delta_type_node = ptrdiff_type_node;
3060 vtable_index_type = ptrdiff_type_node;
3062 vtt_parm_type = build_pointer_type (const_ptr_type_node);
3063 void_ftype = build_function_type (void_type_node, void_list_node);
3064 void_ftype_ptr = build_function_type (void_type_node,
3065 tree_cons (NULL_TREE,
3069 = build_exception_variant (void_ftype_ptr, empty_except_spec);
3071 /* C++ extensions */
3073 unknown_type_node = make_node (UNKNOWN_TYPE);
3074 record_unknown_type (unknown_type_node, "unknown type");
3076 /* Indirecting an UNKNOWN_TYPE node yields an UNKNOWN_TYPE node. */
3077 TREE_TYPE (unknown_type_node) = unknown_type_node;
3079 /* Looking up TYPE_POINTER_TO and TYPE_REFERENCE_TO yield the same
3081 TYPE_POINTER_TO (unknown_type_node) = unknown_type_node;
3082 TYPE_REFERENCE_TO (unknown_type_node) = unknown_type_node;
3085 /* Make sure we get a unique function type, so we can give
3086 its pointer type a name. (This wins for gdb.) */
3087 tree vfunc_type = make_node (FUNCTION_TYPE);
3088 TREE_TYPE (vfunc_type) = integer_type_node;
3089 TYPE_ARG_TYPES (vfunc_type) = NULL_TREE;
3090 layout_type (vfunc_type);
3092 vtable_entry_type = build_pointer_type (vfunc_type);
3094 record_builtin_type (RID_MAX, VTBL_PTR_TYPE, vtable_entry_type);
3097 = build_cplus_array_type (vtable_entry_type, NULL_TREE);
3098 layout_type (vtbl_type_node);
3099 vtbl_type_node = build_qualified_type (vtbl_type_node, TYPE_QUAL_CONST);
3100 record_builtin_type (RID_MAX, NULL, vtbl_type_node);
3101 vtbl_ptr_type_node = build_pointer_type (vtable_entry_type);
3102 layout_type (vtbl_ptr_type_node);
3103 record_builtin_type (RID_MAX, NULL, vtbl_ptr_type_node);
3105 push_namespace (get_identifier ("__cxxabiv1"));
3106 abi_node = current_namespace;
3109 global_type_node = make_node (LANG_TYPE);
3110 record_unknown_type (global_type_node, "global type");
3113 current_lang_name = lang_name_cplusplus;
3117 tree bad_alloc_type_node;
3118 tree bad_alloc_decl;
3119 tree newtype, deltype;
3120 tree ptr_ftype_sizetype;
3122 push_namespace (std_identifier);
3123 bad_alloc_id = get_identifier ("bad_alloc");
3124 bad_alloc_type_node = make_aggr_type (RECORD_TYPE);
3125 TYPE_CONTEXT (bad_alloc_type_node) = current_namespace;
3127 = create_implicit_typedef (bad_alloc_id, bad_alloc_type_node);
3128 DECL_CONTEXT (bad_alloc_decl) = current_namespace;
3129 TYPE_STUB_DECL (bad_alloc_type_node) = bad_alloc_decl;
3133 = build_function_type (ptr_type_node,
3134 tree_cons (NULL_TREE,
3137 newtype = build_exception_variant
3138 (ptr_ftype_sizetype, add_exception_specifier
3139 (NULL_TREE, bad_alloc_type_node, -1));
3140 deltype = build_exception_variant (void_ftype_ptr, empty_except_spec);
3141 push_cp_library_fn (NEW_EXPR, newtype);
3142 push_cp_library_fn (VEC_NEW_EXPR, newtype);
3143 global_delete_fndecl = push_cp_library_fn (DELETE_EXPR, deltype);
3144 push_cp_library_fn (VEC_DELETE_EXPR, deltype);
3148 = build_library_fn_ptr ("__cxa_pure_virtual", void_ftype);
3150 /* Perform other language dependent initializations. */
3151 init_class_processing ();
3152 init_rtti_processing ();
3154 if (flag_exceptions)
3155 init_exception_processing ();
3157 if (! supports_one_only ())
3160 make_fname_decl = cp_make_fname_decl;
3161 start_fname_decls ();
3163 /* Show we use EH for cleanups. */
3164 if (flag_exceptions)
3165 using_eh_for_cleanups ();
3168 /* Generate an initializer for a function naming variable from
3169 NAME. NAME may be NULL, to indicate a dependent name. TYPE_P is
3170 filled in with the type of the init. */
3173 cp_fname_init (const char* name, tree *type_p)
3175 tree domain = NULL_TREE;
3177 tree init = NULL_TREE;
3182 length = strlen (name);
3183 domain = build_index_type (size_int (length));
3184 init = build_string (length + 1, name);
3187 type = build_qualified_type (char_type_node, TYPE_QUAL_CONST);
3188 type = build_cplus_array_type (type, domain);
3193 TREE_TYPE (init) = type;
3195 init = error_mark_node;
3200 /* Create the VAR_DECL for __FUNCTION__ etc. ID is the name to give the
3201 decl, NAME is the initialization string and TYPE_DEP indicates whether
3202 NAME depended on the type of the function. We make use of that to detect
3203 __PRETTY_FUNCTION__ inside a template fn. This is being done
3204 lazily at the point of first use, so we mustn't push the decl now. */
3207 cp_make_fname_decl (tree id, int type_dep)
3209 const char *const name = (type_dep && processing_template_decl
3210 ? NULL : fname_as_string (type_dep));
3212 tree init = cp_fname_init (name, &type);
3213 tree decl = build_decl (VAR_DECL, id, type);
3216 free ((char *) name);
3218 /* As we're using pushdecl_with_scope, we must set the context. */
3219 DECL_CONTEXT (decl) = current_function_decl;
3220 DECL_PRETTY_FUNCTION_P (decl) = type_dep;
3222 TREE_STATIC (decl) = 1;
3223 TREE_READONLY (decl) = 1;
3224 DECL_ARTIFICIAL (decl) = 1;
3225 DECL_INITIAL (decl) = init;
3227 TREE_USED (decl) = 1;
3229 if (current_function_decl)
3231 struct cp_binding_level *b = current_binding_level;
3232 while (b->level_chain->kind != sk_function_parms)
3234 pushdecl_with_scope (decl, b);
3235 cp_finish_decl (decl, init, NULL_TREE, LOOKUP_ONLYCONVERTING);
3238 pushdecl_top_level_and_finish (decl, init);
3243 /* Make a definition for a builtin function named NAME in the current
3244 namespace, whose data type is TYPE and whose context is CONTEXT.
3245 TYPE should be a function type with argument types.
3247 CLASS and CODE tell later passes how to compile calls to this function.
3248 See tree.h for possible values.
3250 If LIBNAME is nonzero, use that for DECL_ASSEMBLER_NAME,
3251 the name to be called if we can't opencode the function.
3252 If ATTRS is nonzero, use that for the function's attribute
3256 builtin_function_1 (const char* name,
3259 enum built_in_function code,
3260 enum built_in_class class,
3261 const char* libname,
3264 tree decl = build_library_fn_1 (get_identifier (name), ERROR_MARK, type);
3265 DECL_BUILT_IN_CLASS (decl) = class;
3266 DECL_FUNCTION_CODE (decl) = code;
3267 DECL_CONTEXT (decl) = context;
3271 /* Since `pushdecl' relies on DECL_ASSEMBLER_NAME instead of DECL_NAME,
3272 we cannot change DECL_ASSEMBLER_NAME until we have installed this
3273 function in the namespace. */
3275 SET_DECL_ASSEMBLER_NAME (decl, get_identifier (libname));
3277 /* Warn if a function in the namespace for users
3278 is used without an occasion to consider it declared. */
3279 if (name[0] != '_' || name[1] != '_')
3280 DECL_ANTICIPATED (decl) = 1;
3282 /* Possibly apply some default attributes to this built-in function. */
3284 decl_attributes (&decl, attrs, ATTR_FLAG_BUILT_IN);
3286 decl_attributes (&decl, NULL_TREE, 0);
3291 /* Entry point for the benefit of c_common_nodes_and_builtins.
3293 Make a definition for a builtin function named NAME and whose data type
3294 is TYPE. TYPE should be a function type with argument types. This
3295 function places the anticipated declaration in the global namespace
3296 and additionally in the std namespace if appropriate.
3298 CLASS and CODE tell later passes how to compile calls to this function.
3299 See tree.h for possible values.
3301 If LIBNAME is nonzero, use that for DECL_ASSEMBLER_NAME,
3302 the name to be called if we can't opencode the function.
3304 If ATTRS is nonzero, use that for the function's attribute
3308 builtin_function (const char* name,
3311 enum built_in_class cl,
3312 const char* libname,
3315 /* All builtins that don't begin with an '_' should additionally
3316 go in the 'std' namespace. */
3319 push_namespace (std_identifier);
3320 builtin_function_1 (name, type, std_node, code, cl, libname, attrs);
3324 return builtin_function_1 (name, type, NULL_TREE, code,
3325 cl, libname, attrs);
3328 /* Generate a FUNCTION_DECL with the typical flags for a runtime library
3329 function. Not called directly. */
3332 build_library_fn_1 (tree name, enum tree_code operator_code, tree type)
3334 tree fn = build_lang_decl (FUNCTION_DECL, name, type);
3335 DECL_EXTERNAL (fn) = 1;
3336 TREE_PUBLIC (fn) = 1;
3337 DECL_ARTIFICIAL (fn) = 1;
3338 TREE_NOTHROW (fn) = 1;
3339 SET_OVERLOADED_OPERATOR_CODE (fn, operator_code);
3340 SET_DECL_LANGUAGE (fn, lang_c);
3341 /* Runtime library routines are, by definition, available in an
3342 external shared object. */
3343 DECL_VISIBILITY (fn) = VISIBILITY_DEFAULT;
3344 DECL_VISIBILITY_SPECIFIED (fn) = 1;
3348 /* Returns the _DECL for a library function with C linkage.
3349 We assume that such functions never throw; if this is incorrect,
3350 callers should unset TREE_NOTHROW. */
3353 build_library_fn (tree name, tree type)
3355 return build_library_fn_1 (name, ERROR_MARK, type);
3358 /* Returns the _DECL for a library function with C++ linkage. */
3361 build_cp_library_fn (tree name, enum tree_code operator_code, tree type)
3363 tree fn = build_library_fn_1 (name, operator_code, type);
3364 TREE_NOTHROW (fn) = TYPE_NOTHROW_P (type);
3365 DECL_CONTEXT (fn) = FROB_CONTEXT (current_namespace);
3366 SET_DECL_LANGUAGE (fn, lang_cplusplus);
3370 /* Like build_library_fn, but takes a C string instead of an
3374 build_library_fn_ptr (const char* name, tree type)
3376 return build_library_fn (get_identifier (name), type);
3379 /* Like build_cp_library_fn, but takes a C string instead of an
3383 build_cp_library_fn_ptr (const char* name, tree type)
3385 return build_cp_library_fn (get_identifier (name), ERROR_MARK, type);
3388 /* Like build_library_fn, but also pushes the function so that we will
3389 be able to find it via IDENTIFIER_GLOBAL_VALUE. */
3392 push_library_fn (tree name, tree type)
3394 tree fn = build_library_fn (name, type);
3395 pushdecl_top_level (fn);
3399 /* Like build_cp_library_fn, but also pushes the function so that it
3400 will be found by normal lookup. */
3403 push_cp_library_fn (enum tree_code operator_code, tree type)
3405 tree fn = build_cp_library_fn (ansi_opname (operator_code),
3412 /* Like push_library_fn, but takes a TREE_LIST of parm types rather than
3416 push_void_library_fn (tree name, tree parmtypes)
3418 tree type = build_function_type (void_type_node, parmtypes);
3419 return push_library_fn (name, type);
3422 /* Like push_library_fn, but also note that this function throws
3423 and does not return. Used for __throw_foo and the like. */
3426 push_throw_library_fn (tree name, tree type)
3428 tree fn = push_library_fn (name, type);
3429 TREE_THIS_VOLATILE (fn) = 1;
3430 TREE_NOTHROW (fn) = 0;
3434 /* When we call finish_struct for an anonymous union, we create
3435 default copy constructors and such. But, an anonymous union
3436 shouldn't have such things; this function undoes the damage to the
3437 anonymous union type T.
3439 (The reason that we create the synthesized methods is that we don't
3440 distinguish `union { int i; }' from `typedef union { int i; } U'.
3441 The first is an anonymous union; the second is just an ordinary
3445 fixup_anonymous_aggr (tree t)
3449 /* Wipe out memory of synthesized methods. */
3450 TYPE_HAS_CONSTRUCTOR (t) = 0;
3451 TYPE_HAS_DEFAULT_CONSTRUCTOR (t) = 0;
3452 TYPE_HAS_INIT_REF (t) = 0;
3453 TYPE_HAS_CONST_INIT_REF (t) = 0;
3454 TYPE_HAS_ASSIGN_REF (t) = 0;
3455 TYPE_HAS_CONST_ASSIGN_REF (t) = 0;
3457 /* Splice the implicitly generated functions out of the TYPE_METHODS
3459 q = &TYPE_METHODS (t);
3462 if (DECL_ARTIFICIAL (*q))
3463 *q = TREE_CHAIN (*q);
3465 q = &TREE_CHAIN (*q);
3468 /* ISO C++ 9.5.3. Anonymous unions may not have function members. */
3469 if (TYPE_METHODS (t))
3470 error ("%Jan anonymous union cannot have function members",
3471 TYPE_MAIN_DECL (t));
3473 /* Anonymous aggregates cannot have fields with ctors, dtors or complex
3474 assignment operators (because they cannot have these methods themselves).
3475 For anonymous unions this is already checked because they are not allowed
3476 in any union, otherwise we have to check it. */
3477 if (TREE_CODE (t) != UNION_TYPE)
3481 for (field = TYPE_FIELDS (t); field; field = TREE_CHAIN (field))
3482 if (TREE_CODE (field) == FIELD_DECL)
3484 type = TREE_TYPE (field);
3485 if (CLASS_TYPE_P (type))
3487 if (TYPE_NEEDS_CONSTRUCTING (type))
3488 cp_error_at ("member %q#D with constructor not allowed "
3489 "in anonymous aggregate",
3491 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type))
3492 cp_error_at ("member %q#D with destructor not allowed "
3493 "in anonymous aggregate",
3495 if (TYPE_HAS_COMPLEX_ASSIGN_REF (type))
3496 cp_error_at ("member %q#D with copy assignment operator "
3497 "not allowed in anonymous aggregate",
3504 /* Make sure that a declaration with no declarator is well-formed, i.e.
3505 just declares a tagged type or anonymous union.
3507 Returns the type declared; or NULL_TREE if none. */
3510 check_tag_decl (cp_decl_specifier_seq *declspecs)
3512 int saw_friend = declspecs->specs[(int)ds_friend] != 0;
3513 int saw_typedef = declspecs->specs[(int)ds_typedef] != 0;
3514 /* If a class, struct, or enum type is declared by the DECLSPECS
3515 (i.e, if a class-specifier, enum-specifier, or non-typename
3516 elaborated-type-specifier appears in the DECLSPECS),
3517 DECLARED_TYPE is set to the corresponding type. */
3518 tree declared_type = NULL_TREE;
3519 bool error_p = false;
3521 if (declspecs->multiple_types_p)
3522 error ("multiple types in one declaration");
3523 else if (declspecs->redefined_builtin_type)
3525 if (!in_system_header)
3526 pedwarn ("redeclaration of C++ built-in type %qT",
3527 declspecs->redefined_builtin_type);
3532 && TYPE_P (declspecs->type)
3533 && ((TREE_CODE (declspecs->type) != TYPENAME_TYPE
3534 && IS_AGGR_TYPE (declspecs->type))
3535 || TREE_CODE (declspecs->type) == ENUMERAL_TYPE))
3536 declared_type = declspecs->type;
3537 else if (declspecs->type == error_mark_node)
3539 if (declared_type == NULL_TREE && ! saw_friend && !error_p)
3540 pedwarn ("declaration does not declare anything");
3541 /* Check for an anonymous union. */
3542 else if (declared_type && IS_AGGR_TYPE_CODE (TREE_CODE (declared_type))
3543 && TYPE_ANONYMOUS_P (declared_type))
3545 /* 7/3 In a simple-declaration, the optional init-declarator-list
3546 can be omitted only when declaring a class (clause 9) or
3547 enumeration (7.2), that is, when the decl-specifier-seq contains
3548 either a class-specifier, an elaborated-type-specifier with
3549 a class-key (9.1), or an enum-specifier. In these cases and
3550 whenever a class-specifier or enum-specifier is present in the
3551 decl-specifier-seq, the identifiers in these specifiers are among
3552 the names being declared by the declaration (as class-name,
3553 enum-names, or enumerators, depending on the syntax). In such
3554 cases, and except for the declaration of an unnamed bit-field (9.6),
3555 the decl-specifier-seq shall introduce one or more names into the
3556 program, or shall redeclare a name introduced by a previous
3557 declaration. [Example:
3558 enum { }; // ill-formed
3559 typedef class { }; // ill-formed
3563 error ("missing type-name in typedef-declaration");
3566 /* Anonymous unions are objects, so they can have specifiers. */;
3567 SET_ANON_AGGR_TYPE_P (declared_type);
3569 if (TREE_CODE (declared_type) != UNION_TYPE && pedantic
3570 && !in_system_header)
3571 pedwarn ("ISO C++ prohibits anonymous structs");
3576 if (declspecs->specs[(int)ds_inline]
3577 || declspecs->specs[(int)ds_virtual])
3578 error ("%qs can only be specified for functions",
3579 declspecs->specs[(int)ds_inline]
3580 ? "inline" : "virtual");
3582 && (!current_class_type
3583 || current_scope () != current_class_type))
3584 error ("%<friend%> can only be specified inside a class");
3585 else if (declspecs->specs[(int)ds_explicit])
3586 error ("%<explicit%> can only be specified for constructors");
3587 else if (declspecs->storage_class)
3588 error ("a storage class can only be specified for objects "
3590 else if (declspecs->specs[(int)ds_const]
3591 || declspecs->specs[(int)ds_volatile]
3592 || declspecs->specs[(int)ds_restrict]
3593 || declspecs->specs[(int)ds_thread])
3594 error ("qualifiers can only be specified for objects "
3598 return declared_type;
3601 /* Called when a declaration is seen that contains no names to declare.
3602 If its type is a reference to a structure, union or enum inherited
3603 from a containing scope, shadow that tag name for the current scope
3604 with a forward reference.
3605 If its type defines a new named structure or union
3606 or defines an enum, it is valid but we need not do anything here.
3607 Otherwise, it is an error.
3609 C++: may have to grok the declspecs to learn about static,
3610 complain for anonymous unions.
3612 Returns the TYPE declared -- or NULL_TREE if none. */
3615 shadow_tag (cp_decl_specifier_seq *declspecs)
3617 tree t = check_tag_decl (declspecs);
3622 if (declspecs->attributes)
3624 cp_warning_at ("attribute ignored in declaration of %q#T", t);
3625 cp_warning_at ("attribute for %q#T must follow the %qs keyword",
3627 class_key_or_enum_as_string (t));
3631 maybe_process_partial_specialization (t);
3633 /* This is where the variables in an anonymous union are
3634 declared. An anonymous union declaration looks like:
3636 because there is no declarator after the union, the parser
3637 sends that declaration here. */
3638 if (ANON_AGGR_TYPE_P (t))
3640 fixup_anonymous_aggr (t);
3642 if (TYPE_FIELDS (t))
3644 tree decl = grokdeclarator (/*declarator=*/NULL,
3645 declspecs, NORMAL, 0, NULL);
3646 finish_anon_union (decl);
3653 /* Decode a "typename", such as "int **", returning a ..._TYPE node. */
3656 groktypename (cp_decl_specifier_seq *type_specifiers,
3657 const cp_declarator *declarator)
3661 attrs = type_specifiers->attributes;
3662 type_specifiers->attributes = NULL_TREE;
3663 type = grokdeclarator (declarator, type_specifiers, TYPENAME, 0, &attrs);
3665 cplus_decl_attributes (&type, attrs, 0);
3669 /* Decode a declarator in an ordinary declaration or data definition.
3670 This is called as soon as the type information and variable name
3671 have been parsed, before parsing the initializer if any.
3672 Here we create the ..._DECL node, fill in its type,
3673 and put it on the list of decls for the current context.
3674 The ..._DECL node is returned as the value.
3676 Exception: for arrays where the length is not specified,
3677 the type is left null, to be filled in by `cp_finish_decl'.
3679 Function definitions do not come here; they go to start_function
3680 instead. However, external and forward declarations of functions
3681 do go through here. Structure field declarations are done by
3682 grokfield and not through here. */
3685 start_decl (const cp_declarator *declarator,
3686 cp_decl_specifier_seq *declspecs,
3689 tree prefix_attributes,
3696 *pop_scope_p = false;
3698 /* This should only be done once on the top most decl. */
3699 if (have_extern_spec)
3701 declspecs->storage_class = sc_extern;
3702 have_extern_spec = false;
3705 /* An object declared as __attribute__((deprecated)) suppresses
3706 warnings of uses of other deprecated items. */
3707 if (lookup_attribute ("deprecated", attributes))
3708 deprecated_state = DEPRECATED_SUPPRESS;
3710 attributes = chainon (attributes, prefix_attributes);
3712 decl = grokdeclarator (declarator, declspecs, NORMAL, initialized,
3715 deprecated_state = DEPRECATED_NORMAL;
3717 if (decl == NULL_TREE || TREE_CODE (decl) == VOID_TYPE)
3718 return error_mark_node;
3720 type = TREE_TYPE (decl);
3722 if (type == error_mark_node)
3723 return error_mark_node;
3725 context = DECL_CONTEXT (decl);
3728 *pop_scope_p = push_scope (context);
3730 /* We are only interested in class contexts, later. */
3731 if (context && TREE_CODE (context) == NAMESPACE_DECL)
3732 context = NULL_TREE;
3735 /* Is it valid for this decl to have an initializer at all?
3736 If not, set INITIALIZED to zero, which will indirectly
3737 tell `cp_finish_decl' to ignore the initializer once it is parsed. */
3738 switch (TREE_CODE (decl))
3741 error ("typedef %qD is initialized (use __typeof__ instead)", decl);
3746 error ("function %q#D is initialized like a variable", decl);
3756 if (! toplevel_bindings_p ()
3757 && DECL_EXTERNAL (decl))
3758 warning ("declaration of %q#D has %<extern%> and is initialized",
3760 DECL_EXTERNAL (decl) = 0;
3761 if (toplevel_bindings_p ())
3762 TREE_STATIC (decl) = 1;
3764 /* Tell `pushdecl' this is an initialized decl
3765 even though we don't yet have the initializer expression.
3766 Also tell `cp_finish_decl' it may store the real initializer. */
3767 DECL_INITIAL (decl) = error_mark_node;
3770 /* Set attributes here so if duplicate decl, will have proper attributes. */
3771 cplus_decl_attributes (&decl, attributes, 0);
3773 /* If #pragma weak was used, mark the decl weak now. */
3774 if (global_scope_p (current_binding_level))
3775 maybe_apply_pragma_weak (decl);
3777 if (TREE_CODE (decl) == FUNCTION_DECL
3778 && DECL_DECLARED_INLINE_P (decl)
3779 && DECL_UNINLINABLE (decl)
3780 && lookup_attribute ("noinline", DECL_ATTRIBUTES (decl)))
3781 warning ("%Jinline function %qD given attribute noinline", decl, decl);
3783 if (context && COMPLETE_TYPE_P (complete_type (context)))
3785 if (TREE_CODE (decl) == VAR_DECL)
3787 tree field = lookup_field (context, DECL_NAME (decl), 0, false);
3788 if (field == NULL_TREE || TREE_CODE (field) != VAR_DECL)
3789 error ("%q#D is not a static member of %q#T", decl, context);
3792 if (DECL_CONTEXT (field) != context)
3794 if (!same_type_p (DECL_CONTEXT (field), context))
3795 pedwarn ("ISO C++ does not permit %<%T::%D%> "
3796 "to be defined as %<%T::%D%>",
3797 DECL_CONTEXT (field), DECL_NAME (decl),
3798 context, DECL_NAME (decl));
3799 DECL_CONTEXT (decl) = DECL_CONTEXT (field);
3801 if (processing_specialization
3802 && template_class_depth (context) == 0
3803 && CLASSTYPE_TEMPLATE_SPECIALIZATION (context))
3804 error ("template header not allowed in member definition "
3805 "of explicitly specialized class");
3806 /* Static data member are tricky; an in-class initialization
3807 still doesn't provide a definition, so the in-class
3808 declaration will have DECL_EXTERNAL set, but will have an
3809 initialization. Thus, duplicate_decls won't warn
3810 about this situation, and so we check here. */
3811 if (DECL_INITIAL (decl) && DECL_INITIAL (field))
3812 error ("duplicate initialization of %qD", decl);
3813 if (duplicate_decls (decl, field))
3819 tree field = check_classfn (context, decl,
3820 (processing_template_decl
3821 > template_class_depth (context))
3822 ? current_template_parms
3824 if (field && duplicate_decls (decl, field))
3828 /* cp_finish_decl sets DECL_EXTERNAL if DECL_IN_AGGR_P is set. */
3829 DECL_IN_AGGR_P (decl) = 0;
3830 if ((DECL_LANG_SPECIFIC (decl) && DECL_USE_TEMPLATE (decl))
3831 || CLASSTYPE_TEMPLATE_INSTANTIATION (context))
3833 SET_DECL_TEMPLATE_SPECIALIZATION (decl);
3834 /* [temp.expl.spec] An explicit specialization of a static data
3835 member of a template is a definition if the declaration
3836 includes an initializer; otherwise, it is a declaration.
3838 We check for processing_specialization so this only applies
3839 to the new specialization syntax. */
3840 if (DECL_INITIAL (decl) == NULL_TREE && processing_specialization)
3841 DECL_EXTERNAL (decl) = 1;
3844 if (DECL_EXTERNAL (decl) && ! DECL_TEMPLATE_SPECIALIZATION (decl))
3845 pedwarn ("declaration of %q#D outside of class is not definition",
3849 /* Enter this declaration into the symbol table. */
3850 tem = maybe_push_decl (decl);
3852 if (processing_template_decl)
3853 tem = push_template_decl (tem);
3854 if (tem == error_mark_node)
3855 return error_mark_node;
3857 #if ! defined (ASM_OUTPUT_BSS) && ! defined (ASM_OUTPUT_ALIGNED_BSS)
3858 /* Tell the back-end to use or not use .common as appropriate. If we say
3859 -fconserve-space, we want this to save .data space, at the expense of
3860 wrong semantics. If we say -fno-conserve-space, we want this to
3861 produce errors about redefs; to do this we force variables into the
3863 DECL_COMMON (tem) = ((TREE_CODE (tem) != VAR_DECL
3864 || !DECL_THREAD_LOCAL (tem))
3865 && (flag_conserve_space || ! TREE_PUBLIC (tem)));
3868 if (! processing_template_decl)
3875 start_decl_1 (tree decl)
3877 tree type = TREE_TYPE (decl);
3878 int initialized = (DECL_INITIAL (decl) != NULL_TREE);
3880 if (type == error_mark_node)
3884 /* Is it valid for this decl to have an initializer at all?
3885 If not, set INITIALIZED to zero, which will indirectly
3886 tell `cp_finish_decl' to ignore the initializer once it is parsed. */
3888 /* Don't allow initializations for incomplete types except for
3889 arrays which might be completed by the initialization. */
3890 if (COMPLETE_TYPE_P (complete_type (type)))
3891 ; /* A complete type is ok. */
3892 else if (TREE_CODE (type) != ARRAY_TYPE)
3894 error ("variable %q#D has initializer but incomplete type", decl);
3896 type = TREE_TYPE (decl) = error_mark_node;
3898 else if (!COMPLETE_TYPE_P (complete_type (TREE_TYPE (type))))
3900 if (DECL_LANG_SPECIFIC (decl) && DECL_TEMPLATE_INFO (decl))
3901 error ("elements of array %q#D have incomplete type", decl);
3902 /* else we already gave an error in start_decl. */
3908 && TREE_CODE (decl) != TYPE_DECL
3909 && TREE_CODE (decl) != TEMPLATE_DECL
3910 && type != error_mark_node
3911 && IS_AGGR_TYPE (type)
3912 && ! DECL_EXTERNAL (decl))
3914 if ((! processing_template_decl || ! uses_template_parms (type))
3915 && !COMPLETE_TYPE_P (complete_type (type)))
3917 error ("aggregate %q#D has incomplete type and cannot be defined",
3919 /* Change the type so that assemble_variable will give
3920 DECL an rtl we can live with: (mem (const_int 0)). */
3921 type = TREE_TYPE (decl) = error_mark_node;
3925 /* If any base type in the hierarchy of TYPE needs a constructor,
3926 then we set initialized to 1. This way any nodes which are
3927 created for the purposes of initializing this aggregate
3928 will live as long as it does. This is necessary for global
3929 aggregates which do not have their initializers processed until
3930 the end of the file. */
3931 initialized = TYPE_NEEDS_CONSTRUCTING (type);
3936 DECL_INITIAL (decl) = NULL_TREE;
3938 /* Create a new scope to hold this declaration if necessary.
3939 Whether or not a new scope is necessary cannot be determined
3940 until after the type has been completed; if the type is a
3941 specialization of a class template it is not until after
3942 instantiation has occurred that TYPE_HAS_NONTRIVIAL_DESTRUCTOR
3943 will be set correctly. */
3944 maybe_push_cleanup_level (type);
3947 /* Handle initialization of references. DECL, TYPE, and INIT have the
3948 same meaning as in cp_finish_decl. *CLEANUP must be NULL on entry,
3949 but will be set to a new CLEANUP_STMT if a temporary is created
3950 that must be destroyed subsequently.
3952 Returns an initializer expression to use to initialize DECL, or
3953 NULL if the initialization can be performed statically.
3955 Quotes on semantics can be found in ARM 8.4.3. */
3958 grok_reference_init (tree decl, tree type, tree init, tree *cleanup)
3962 if (init == NULL_TREE)
3964 if ((DECL_LANG_SPECIFIC (decl) == 0
3965 || DECL_IN_AGGR_P (decl) == 0)
3966 && ! DECL_THIS_EXTERN (decl))
3967 error ("%qD declared as reference but not initialized", decl);
3971 if (TREE_CODE (init) == CONSTRUCTOR)
3973 error ("ISO C++ forbids use of initializer list to "
3974 "initialize reference %qD", decl);
3978 if (TREE_CODE (init) == TREE_LIST)
3979 init = build_x_compound_expr_from_list (init, "initializer");
3981 if (TREE_CODE (TREE_TYPE (type)) != ARRAY_TYPE
3982 && TREE_CODE (TREE_TYPE (init)) == ARRAY_TYPE)
3983 /* Note: default conversion is only called in very special cases. */
3984 init = decay_conversion (init);
3986 /* Convert INIT to the reference type TYPE. This may involve the
3987 creation of a temporary, whose lifetime must be the same as that
3988 of the reference. If so, a DECL_EXPR for the temporary will be
3989 added just after the DECL_EXPR for DECL. That's why we don't set
3990 DECL_INITIAL for local references (instead assigning to them
3991 explicitly); we need to allow the temporary to be initialized
3993 tmp = initialize_reference (type, init, decl, cleanup);
3995 if (tmp == error_mark_node)
3997 else if (tmp == NULL_TREE)
3999 error ("cannot initialize %qT from %qT", type, TREE_TYPE (init));
4003 if (TREE_STATIC (decl) && !TREE_CONSTANT (tmp))
4006 DECL_INITIAL (decl) = tmp;
4011 /* When parsing `int a[] = {1, 2};' we don't know the size of the
4012 array until we finish parsing the initializer. If that's the
4013 situation we're in, update DECL accordingly. */
4016 maybe_deduce_size_from_array_init (tree decl, tree init)
4018 tree type = TREE_TYPE (decl);
4020 if (TREE_CODE (type) == ARRAY_TYPE
4021 && TYPE_DOMAIN (type) == NULL_TREE
4022 && TREE_CODE (decl) != TYPE_DECL)
4024 /* do_default is really a C-ism to deal with tentative definitions.
4025 But let's leave it here to ease the eventual merge. */
4026 int do_default = !DECL_EXTERNAL (decl);
4027 tree initializer = init ? init : DECL_INITIAL (decl);
4028 int failure = complete_array_type (type, initializer, do_default);
4031 error ("initializer fails to determine size of %qD", decl);
4036 error ("array size missing in %qD", decl);
4037 /* If a `static' var's size isn't known, make it extern as
4038 well as static, so it does not get allocated. If it's not
4039 `static', then don't mark it extern; finish_incomplete_decl
4040 will give it a default size and it will get allocated. */
4041 else if (!pedantic && TREE_STATIC (decl) && !TREE_PUBLIC (decl))
4042 DECL_EXTERNAL (decl) = 1;
4045 if (pedantic && TYPE_DOMAIN (type) != NULL_TREE
4046 && tree_int_cst_lt (TYPE_MAX_VALUE (TYPE_DOMAIN (type)),
4048 error ("zero-size array %qD", decl);
4050 layout_decl (decl, 0);
4054 /* Set DECL_SIZE, DECL_ALIGN, etc. for DECL (a VAR_DECL), and issue
4055 any appropriate error messages regarding the layout. */
4058 layout_var_decl (tree decl)
4060 tree type = TREE_TYPE (decl);
4062 tree ttype = target_type (type);
4065 /* If we haven't already layed out this declaration, do so now.
4066 Note that we must not call complete type for an external object
4067 because it's type might involve templates that we are not
4068 supposed to instantiate yet. (And it's perfectly valid to say
4069 `extern X x' for some incomplete type `X'.) */
4070 if (!DECL_EXTERNAL (decl))
4071 complete_type (type);
4072 if (!DECL_SIZE (decl)
4073 && TREE_TYPE (decl) != error_mark_node
4074 && (COMPLETE_TYPE_P (type)
4075 || (TREE_CODE (type) == ARRAY_TYPE
4076 && !TYPE_DOMAIN (type)
4077 && COMPLETE_TYPE_P (TREE_TYPE (type)))))
4078 layout_decl (decl, 0);
4080 if (!DECL_EXTERNAL (decl) && DECL_SIZE (decl) == NULL_TREE)
4082 /* An automatic variable with an incomplete type: that is an error.
4083 Don't talk about array types here, since we took care of that
4084 message in grokdeclarator. */
4085 error ("storage size of %qD isn't known", decl);
4086 TREE_TYPE (decl) = error_mark_node;
4089 /* Keep this code around in case we later want to control debug info
4090 based on whether a type is "used". (jason 1999-11-11) */
4092 else if (!DECL_EXTERNAL (decl) && IS_AGGR_TYPE (ttype))
4093 /* Let debugger know it should output info for this type. */
4094 note_debug_info_needed (ttype);
4096 if (TREE_STATIC (decl) && DECL_CLASS_SCOPE_P (decl))
4097 note_debug_info_needed (DECL_CONTEXT (decl));
4100 if ((DECL_EXTERNAL (decl) || TREE_STATIC (decl))
4101 && DECL_SIZE (decl) != NULL_TREE
4102 && ! TREE_CONSTANT (DECL_SIZE (decl)))
4104 if (TREE_CODE (DECL_SIZE (decl)) == INTEGER_CST)
4105 constant_expression_warning (DECL_SIZE (decl));
4107 error ("storage size of %qD isn't constant", decl);
4110 if (TREE_STATIC (decl)
4111 && !DECL_ARTIFICIAL (decl)
4112 && current_function_decl
4113 && DECL_CONTEXT (decl) == current_function_decl)
4114 push_local_name (decl);
4117 /* If a local static variable is declared in an inline function, or if
4118 we have a weak definition, we must endeavor to create only one
4119 instance of the variable at link-time. */
4122 maybe_commonize_var (tree decl)
4124 /* Static data in a function with comdat linkage also has comdat
4126 if (TREE_STATIC (decl)
4127 /* Don't mess with __FUNCTION__. */
4128 && ! DECL_ARTIFICIAL (decl)
4129 && DECL_FUNCTION_SCOPE_P (decl)
4130 /* Unfortunately, import_export_decl has not always been called
4131 before the function is processed, so we cannot simply check
4133 && (DECL_COMDAT (DECL_CONTEXT (decl))
4134 || ((DECL_DECLARED_INLINE_P (DECL_CONTEXT (decl))
4135 || DECL_TEMPLATE_INSTANTIATION (DECL_CONTEXT (decl)))
4136 && TREE_PUBLIC (DECL_CONTEXT (decl)))))
4140 /* With weak symbols, we simply make the variable COMDAT;
4141 that will cause copies in multiple translations units to
4143 comdat_linkage (decl);
4147 if (DECL_INITIAL (decl) == NULL_TREE
4148 || DECL_INITIAL (decl) == error_mark_node)
4150 /* Without weak symbols, we can use COMMON to merge
4151 uninitialized variables. */
4152 TREE_PUBLIC (decl) = 1;
4153 DECL_COMMON (decl) = 1;
4157 /* While for initialized variables, we must use internal
4158 linkage -- which means that multiple copies will not
4160 TREE_PUBLIC (decl) = 0;
4161 DECL_COMMON (decl) = 0;
4162 cp_warning_at ("sorry: semantics of inline function static "
4163 "data %q#D are wrong (you'll wind up "
4164 "with multiple copies)", decl);
4165 warning ("%J you can work around this by removing "
4171 else if (DECL_LANG_SPECIFIC (decl) && DECL_COMDAT (decl))
4172 /* Set it up again; we might have set DECL_INITIAL since the last
4174 comdat_linkage (decl);
4177 /* Issue an error message if DECL is an uninitialized const variable. */
4180 check_for_uninitialized_const_var (tree decl)
4182 tree type = TREE_TYPE (decl);
4184 /* ``Unless explicitly declared extern, a const object does not have
4185 external linkage and must be initialized. ($8.4; $12.1)'' ARM
4187 if (TREE_CODE (decl) == VAR_DECL
4188 && TREE_CODE (type) != REFERENCE_TYPE
4189 && CP_TYPE_CONST_P (type)
4190 && !TYPE_NEEDS_CONSTRUCTING (type)
4191 && !DECL_INITIAL (decl))
4192 error ("uninitialized const %qD", decl);
4195 /* FIELD is a FIELD_DECL or NULL. In the former case, the value
4196 returned is the next FIELD_DECL (possibly FIELD itself) that can be
4197 initialized. If there are no more such fields, the return value
4201 next_initializable_field (tree field)
4204 && (TREE_CODE (field) != FIELD_DECL
4205 || (DECL_C_BIT_FIELD (field) && !DECL_NAME (field))
4206 || DECL_ARTIFICIAL (field)))
4207 field = TREE_CHAIN (field);
4212 /* Subroutine of reshape_init. Reshape the constructor for an array. INITP
4213 is the pointer to the old constructor list (to the CONSTRUCTOR_ELTS of
4214 the CONSTRUCTOR we are processing), while NEW_INIT is the CONSTRUCTOR we
4216 ELT_TYPE is the element type of the array. MAX_INDEX is an INTEGER_CST
4217 representing the size of the array minus one (the maximum index), or
4218 NULL_TREE if the array was declared without specifying the size. */
4221 reshape_init_array (tree elt_type, tree max_index,
4222 tree *initp, tree new_init)
4224 bool sized_array_p = (max_index != NULL_TREE);
4225 HOST_WIDE_INT max_index_cst = 0;
4226 HOST_WIDE_INT index;
4229 /* HWI is either 32bit or 64bit, so it must be enough to represent the
4231 max_index_cst = tree_low_cst (max_index, 1);
4233 /* Loop until there are no more initializers. */
4235 *initp && (!sized_array_p || index <= max_index_cst);
4239 tree designated_index;
4241 element_init = reshape_init (elt_type, initp);
4242 if (element_init == error_mark_node)
4244 TREE_CHAIN (element_init) = CONSTRUCTOR_ELTS (new_init);
4245 CONSTRUCTOR_ELTS (new_init) = element_init;
4246 designated_index = TREE_PURPOSE (element_init);
4247 if (designated_index)
4249 /* Handle array designated initializers (GNU extension). */
4250 if (TREE_CODE (designated_index) == IDENTIFIER_NODE)
4252 error ("name %qD used in a GNU-style designated "
4253 "initializer for an array", designated_index);
4254 TREE_PURPOSE (element_init) = NULL_TREE;
4258 gcc_assert (TREE_CODE (designated_index) == INTEGER_CST);
4260 && tree_int_cst_lt (max_index, designated_index))
4262 error ("Designated initializer %qE larger than array "
4263 "size", designated_index);
4264 TREE_PURPOSE (element_init) = NULL_TREE;
4267 index = tree_low_cst (designated_index, 1);
4275 /* Undo the brace-elision allowed by [dcl.init.aggr] in a
4276 brace-enclosed aggregate initializer.
4278 *INITP is one of a list of initializers describing a brace-enclosed
4279 initializer for an entity of the indicated aggregate TYPE. It may
4280 not presently match the shape of the TYPE; for example:
4282 struct S { int a; int b; };
4283 struct S a[] = { 1, 2, 3, 4 };
4285 Here *INITP will point to TREE_LIST of four elements, rather than a
4286 list of two elements, each itself a list of two elements. This
4287 routine transforms INIT from the former form into the latter. The
4288 revised initializer is returned. */
4291 reshape_init (tree type, tree *initp)
4295 tree old_init_value;
4297 bool brace_enclosed_p;
4300 old_init_value = (TREE_CODE (*initp) == TREE_LIST
4301 ? TREE_VALUE (*initp) : old_init);
4303 gcc_assert (old_init_value);
4305 /* If the initializer is brace-enclosed, pull initializers from the
4306 enclosed elements. Advance past the brace-enclosed initializer
4308 if (TREE_CODE (old_init_value) == CONSTRUCTOR
4309 && BRACE_ENCLOSED_INITIALIZER_P (old_init_value))
4311 *initp = TREE_CHAIN (old_init);
4312 TREE_CHAIN (old_init) = NULL_TREE;
4313 inits = CONSTRUCTOR_ELTS (old_init_value);
4315 brace_enclosed_p = true;
4320 brace_enclosed_p = false;
4323 /* A non-aggregate type is always initialized with a single
4325 if (!CP_AGGREGATE_TYPE_P (type))
4327 *initp = TREE_CHAIN (old_init);
4328 TREE_CHAIN (old_init) = NULL_TREE;
4329 /* It is invalid to initialize a non-aggregate type with a
4330 brace-enclosed initializer. */
4331 if (brace_enclosed_p)
4333 error ("brace-enclosed initializer used to initialize %qT",
4335 if (TREE_CODE (old_init) == TREE_LIST)
4336 TREE_VALUE (old_init) = error_mark_node;
4338 old_init = error_mark_node;
4346 All implicit type conversions (clause _conv_) are considered when
4347 initializing the aggregate member with an initializer from an
4348 initializer-list. If the initializer can initialize a member,
4349 the member is initialized. Otherwise, if the member is itself a
4350 non-empty subaggregate, brace elision is assumed and the
4351 initializer is considered for the initialization of the first
4352 member of the subaggregate. */
4353 if (!brace_enclosed_p
4354 && can_convert_arg (type, TREE_TYPE (old_init_value), old_init_value))
4356 *initp = TREE_CHAIN (old_init);
4357 TREE_CHAIN (old_init) = NULL_TREE;
4361 if (TREE_CODE (old_init_value) == STRING_CST
4362 && TREE_CODE (type) == ARRAY_TYPE
4363 && char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (type))))
4365 /* [dcl.init.string]
4367 A char array (whether plain char, signed char, or unsigned char)
4368 can be initialized by a string-literal (optionally enclosed in
4369 braces); a wchar_t array can be initialized by a wide
4370 string-literal (optionally enclosed in braces). */
4371 new_init = old_init;
4372 /* Move past the initializer. */
4373 *initp = TREE_CHAIN (old_init);
4374 TREE_CHAIN (old_init) = NULL_TREE;
4378 /* Build a CONSTRUCTOR to hold the contents of the aggregate. */
4379 new_init = build_constructor (NULL_TREE, NULL_TREE);
4381 if (CLASS_TYPE_P (type))
4385 field = next_initializable_field (TYPE_FIELDS (type));
4391 An initializer for an aggregate member that is an
4392 empty class shall have the form of an empty
4393 initializer-list {}. */
4394 if (!brace_enclosed_p)
4396 error ("initializer for %qT must be brace-enclosed", type);
4397 return error_mark_node;
4402 /* Loop through the initializable fields, gathering
4408 /* Handle designated initializers, as an extension. */
4409 if (TREE_PURPOSE (*initp))
4412 pedwarn ("ISO C++ does not allow designated initializers");
4413 field = lookup_field_1 (type, TREE_PURPOSE (*initp),
4414 /*want_type=*/false);
4415 if (!field || TREE_CODE (field) != FIELD_DECL)
4416 error ("%qT has no non-static data member named %qD",
4417 type, TREE_PURPOSE (*initp));
4422 field_init = reshape_init (TREE_TYPE (field), initp);
4423 if (field_init == error_mark_node)
4424 return error_mark_node;
4425 TREE_CHAIN (field_init) = CONSTRUCTOR_ELTS (new_init);
4426 CONSTRUCTOR_ELTS (new_init) = field_init;
4429 When a union is initialized with a brace-enclosed
4430 initializer, the braces shall only contain an
4431 initializer for the first member of the union. */
4432 if (TREE_CODE (type) == UNION_TYPE)
4434 field = next_initializable_field (TREE_CHAIN (field));
4438 else if (TREE_CODE (type) == ARRAY_TYPE
4439 || TREE_CODE (type) == VECTOR_TYPE)
4441 /* If the bound of the array is known, take no more initializers
4442 than are allowed. */
4443 tree max_index = NULL_TREE;
4444 if (TREE_CODE (type) == ARRAY_TYPE)
4446 if (TYPE_DOMAIN (type))
4447 max_index = array_type_nelts (type);
4451 /* For a vector, the representation type is a struct
4452 containing a single member which is an array of the
4453 appropriate size. */
4454 tree rtype = TYPE_DEBUG_REPRESENTATION_TYPE (type);
4455 if (rtype && TYPE_DOMAIN (TREE_TYPE (TYPE_FIELDS (rtype))))
4456 max_index = array_type_nelts (TREE_TYPE (TYPE_FIELDS
4460 if (!reshape_init_array (TREE_TYPE (type), max_index,
4462 return error_mark_node;
4467 /* The initializers were placed in reverse order in the
4469 CONSTRUCTOR_ELTS (new_init) = nreverse (CONSTRUCTOR_ELTS (new_init));
4471 if (TREE_CODE (old_init) == TREE_LIST)
4472 new_init = build_tree_list (TREE_PURPOSE (old_init), new_init);
4475 /* If this was a brace-enclosed initializer and all of the
4476 initializers were not used up, there is a problem. */
4477 if (brace_enclosed_p && *initp)
4478 error ("too many initializers for %qT", type);
4483 /* Verify INIT (the initializer for DECL), and record the
4484 initialization in DECL_INITIAL, if appropriate. CLEANUP is as for
4485 grok_reference_init.
4487 If the return value is non-NULL, it is an expression that must be
4488 evaluated dynamically to initialize DECL. */
4491 check_initializer (tree decl, tree init, int flags, tree *cleanup)
4493 tree type = TREE_TYPE (decl);
4494 tree init_code = NULL;
4496 /* If `start_decl' didn't like having an initialization, ignore it now. */
4497 if (init != NULL_TREE && DECL_INITIAL (decl) == NULL_TREE)
4500 /* If an initializer is present, DECL_INITIAL has been
4501 error_mark_node, to indicate that an as-of-yet unevaluated
4502 initialization will occur. From now on, DECL_INITIAL reflects
4503 the static initialization -- if any -- of DECL. */
4504 DECL_INITIAL (decl) = NULL_TREE;
4506 /* Things that are going to be initialized need to have complete
4508 TREE_TYPE (decl) = type = complete_type (TREE_TYPE (decl));
4510 if (type == error_mark_node)
4511 /* We will have already complained. */
4513 else if (init && COMPLETE_TYPE_P (type)
4514 && !TREE_CONSTANT (TYPE_SIZE (type)))
4516 error ("variable-sized object %qD may not be initialized", decl);
4519 else if (TREE_CODE (type) == ARRAY_TYPE
4520 && !COMPLETE_TYPE_P (complete_type (TREE_TYPE (type))))
4522 error ("elements of array %q#D have incomplete type", decl);
4525 else if (TREE_CODE (type) != ARRAY_TYPE && !COMPLETE_TYPE_P (type))
4527 error ("%qD has incomplete type", decl);
4528 TREE_TYPE (decl) = error_mark_node;
4532 if (TREE_CODE (decl) == CONST_DECL)
4534 gcc_assert (TREE_CODE (decl) != REFERENCE_TYPE);
4536 DECL_INITIAL (decl) = init;
4538 gcc_assert (init != NULL_TREE);
4541 else if (!DECL_EXTERNAL (decl) && TREE_CODE (type) == REFERENCE_TYPE)
4542 init = grok_reference_init (decl, type, init, cleanup);
4545 if (TREE_CODE (init) == CONSTRUCTOR
4546 && BRACE_ENCLOSED_INITIALIZER_P (init))
4548 /* [dcl.init] paragraph 13,
4549 If T is a scalar type, then a declaration of the form
4554 reshape_init will complain about the extra braces,
4555 and doesn't do anything useful in the case where TYPE is
4556 scalar, so just don't call it. */
4557 if (CP_AGGREGATE_TYPE_P (type))
4558 init = reshape_init (type, &init);
4560 if ((*targetm.vector_opaque_p) (type))
4562 error ("opaque vector types cannot be initialized");
4563 init = error_mark_node;
4567 /* If DECL has an array type without a specific bound, deduce the
4568 array size from the initializer. */
4569 maybe_deduce_size_from_array_init (decl, init);
4570 type = TREE_TYPE (decl);
4572 if (TYPE_HAS_CONSTRUCTOR (type) || TYPE_NEEDS_CONSTRUCTING (type))
4574 if (TREE_CODE (type) == ARRAY_TYPE)
4575 goto initialize_aggr;
4576 else if (TREE_CODE (init) == CONSTRUCTOR
4577 && BRACE_ENCLOSED_INITIALIZER_P (init))
4579 if (TYPE_NON_AGGREGATE_CLASS (type))
4581 error ("%qD must be initialized by constructor, "
4584 init = error_mark_node;
4587 goto dont_use_constructor;
4591 int saved_stmts_are_full_exprs_p;
4594 saved_stmts_are_full_exprs_p = 0;
4595 if (building_stmt_tree ())
4597 saved_stmts_are_full_exprs_p = stmts_are_full_exprs_p ();
4598 current_stmt_tree ()->stmts_are_full_exprs_p = 1;
4600 init = build_aggr_init (decl, init, flags);
4601 if (building_stmt_tree ())
4602 current_stmt_tree ()->stmts_are_full_exprs_p =
4603 saved_stmts_are_full_exprs_p;
4609 dont_use_constructor:
4610 if (TREE_CODE (init) != TREE_VEC)
4612 init_code = store_init_value (decl, init);
4613 if (pedantic && TREE_CODE (type) == ARRAY_TYPE
4614 && DECL_INITIAL (decl)
4615 && TREE_CODE (DECL_INITIAL (decl)) == STRING_CST
4616 && PAREN_STRING_LITERAL_P (DECL_INITIAL (decl)))
4617 warning ("array %qD initialized by parenthesized string literal %qE",
4618 decl, DECL_INITIAL (decl));
4623 else if (DECL_EXTERNAL (decl))
4625 else if (TYPE_P (type) && TYPE_NEEDS_CONSTRUCTING (type))
4626 goto initialize_aggr;
4627 else if (IS_AGGR_TYPE (type))
4629 tree core_type = strip_array_types (type);
4631 if (CLASSTYPE_READONLY_FIELDS_NEED_INIT (core_type))
4632 error ("structure %qD with uninitialized const members", decl);
4633 if (CLASSTYPE_REF_FIELDS_NEED_INIT (core_type))
4634 error ("structure %qD with uninitialized reference members", decl);
4636 check_for_uninitialized_const_var (decl);
4639 check_for_uninitialized_const_var (decl);
4641 if (init && init != error_mark_node)
4642 init_code = build2 (INIT_EXPR, type, decl, init);
4647 /* If DECL is not a local variable, give it RTL. */
4650 make_rtl_for_nonlocal_decl (tree decl, tree init, const char* asmspec)
4652 int toplev = toplevel_bindings_p ();
4655 /* Set the DECL_ASSEMBLER_NAME for the object. */
4658 /* The `register' keyword, when used together with an
4659 asm-specification, indicates that the variable should be
4660 placed in a particular register. */
4661 if (TREE_CODE (decl) == VAR_DECL && DECL_REGISTER (decl))
4663 change_decl_assembler_name (decl, get_identifier (asmspec));
4664 DECL_HARD_REGISTER (decl) = 1;
4668 if (TREE_CODE (decl) == FUNCTION_DECL
4669 && DECL_BUILT_IN_CLASS (decl) == BUILT_IN_NORMAL)
4670 set_builtin_user_assembler_name (decl, asmspec);
4671 set_user_assembler_name (decl, asmspec);
4675 /* Handle non-variables up front. */
4676 if (TREE_CODE (decl) != VAR_DECL)
4678 rest_of_decl_compilation (decl, toplev, at_eof);
4682 /* If we see a class member here, it should be a static data
4684 if (DECL_LANG_SPECIFIC (decl) && DECL_IN_AGGR_P (decl))
4686 gcc_assert (TREE_STATIC (decl));
4687 /* An in-class declaration of a static data member should be
4688 external; it is only a declaration, and not a definition. */
4689 if (init == NULL_TREE)
4690 gcc_assert (DECL_EXTERNAL (decl));
4693 /* We don't create any RTL for local variables. */
4694 if (DECL_FUNCTION_SCOPE_P (decl) && !TREE_STATIC (decl))
4697 /* We defer emission of local statics until the corresponding
4698 DECL_EXPR is expanded. */
4699 defer_p = DECL_FUNCTION_SCOPE_P (decl) || DECL_VIRTUAL_P (decl);
4701 /* We try to defer namespace-scope static constants so that they are
4702 not emitted into the object file unnecessarily. */
4703 if (!DECL_VIRTUAL_P (decl)
4704 && TREE_READONLY (decl)
4705 && DECL_INITIAL (decl) != NULL_TREE
4706 && DECL_INITIAL (decl) != error_mark_node
4707 && ! EMPTY_CONSTRUCTOR_P (DECL_INITIAL (decl))
4709 && !TREE_PUBLIC (decl))
4711 /* Fool with the linkage of static consts according to #pragma
4713 struct c_fileinfo *finfo = get_fileinfo (lbasename (input_filename));
4714 if (!finfo->interface_unknown && !TREE_PUBLIC (decl))
4716 TREE_PUBLIC (decl) = 1;
4717 DECL_EXTERNAL (decl) = finfo->interface_only;
4722 /* Likewise for template instantiations. */
4723 else if (DECL_LANG_SPECIFIC (decl)
4724 && DECL_IMPLICIT_INSTANTIATION (decl))
4727 /* If we're not deferring, go ahead and assemble the variable. */
4729 rest_of_decl_compilation (decl, toplev, at_eof);
4732 /* Generate code to initialize DECL (a local variable). */
4735 initialize_local_var (tree decl, tree init)
4737 tree type = TREE_TYPE (decl);
4740 gcc_assert (TREE_CODE (decl) == VAR_DECL
4741 || TREE_CODE (decl) == RESULT_DECL);
4742 gcc_assert (!TREE_STATIC (decl));
4744 if (DECL_SIZE (decl) == NULL_TREE)
4746 /* If we used it already as memory, it must stay in memory. */
4747 DECL_INITIAL (decl) = NULL_TREE;
4748 TREE_ADDRESSABLE (decl) = TREE_USED (decl);
4751 if (DECL_SIZE (decl) && type != error_mark_node)
4755 /* Compute and store the initial value. */
4756 already_used = TREE_USED (decl) || TREE_USED (type);
4758 /* Perform the initialization. */
4761 int saved_stmts_are_full_exprs_p;
4763 gcc_assert (building_stmt_tree ());
4764 saved_stmts_are_full_exprs_p = stmts_are_full_exprs_p ();
4765 current_stmt_tree ()->stmts_are_full_exprs_p = 1;
4766 finish_expr_stmt (init);
4767 current_stmt_tree ()->stmts_are_full_exprs_p =
4768 saved_stmts_are_full_exprs_p;
4771 /* Set this to 0 so we can tell whether an aggregate which was
4772 initialized was ever used. Don't do this if it has a
4773 destructor, so we don't complain about the 'resource
4774 allocation is initialization' idiom. Now set
4775 attribute((unused)) on types so decls of that type will be
4776 marked used. (see TREE_USED, above.) */
4777 if (TYPE_NEEDS_CONSTRUCTING (type)
4779 && TYPE_HAS_TRIVIAL_DESTRUCTOR (type)
4780 && DECL_NAME (decl))
4781 TREE_USED (decl) = 0;
4782 else if (already_used)
4783 TREE_USED (decl) = 1;
4786 /* Generate a cleanup, if necessary. */
4787 cleanup = cxx_maybe_build_cleanup (decl);
4788 if (DECL_SIZE (decl) && cleanup)
4789 finish_decl_cleanup (decl, cleanup);
4792 /* DECL is a VAR_DECL for a compiler-generated variable with static
4793 storage duration (like a virtual table) whose initializer is a
4794 compile-time constant. Initialize the variable and provide it to
4798 initialize_artificial_var (tree decl, tree init)
4800 DECL_INITIAL (decl) = build_constructor (NULL_TREE, init);
4801 DECL_INITIALIZED_P (decl) = 1;
4802 determine_visibility (decl);
4803 layout_var_decl (decl);
4804 maybe_commonize_var (decl);
4805 make_rtl_for_nonlocal_decl (decl, init, /*asmspec=*/NULL);
4808 /* Finish processing of a declaration;
4809 install its line number and initial value.
4810 If the length of an array type is not known before,
4811 it must be determined now, from the initial value, or it is an error.
4813 INIT holds the value of an initializer that should be allowed to escape
4816 FLAGS is LOOKUP_ONLYCONVERTING if the = init syntax was used, else 0
4817 if the (init) syntax was used. */
4820 cp_finish_decl (tree decl, tree init, tree asmspec_tree, int flags)
4823 tree ttype = NULL_TREE;
4825 const char *asmspec = NULL;
4826 int was_readonly = 0;
4827 bool var_definition_p = false;
4829 if (decl == error_mark_node)
4834 error ("assignment (not initialization) in declaration");
4838 gcc_assert (TREE_CODE (decl) != RESULT_DECL);
4840 /* Assume no cleanup is required. */
4841 cleanup = NULL_TREE;
4843 /* If a name was specified, get the string. */
4844 if (global_scope_p (current_binding_level))
4845 asmspec_tree = maybe_apply_renaming_pragma (decl, asmspec_tree);
4847 asmspec = TREE_STRING_POINTER (asmspec_tree);
4849 if (init && TREE_CODE (init) == NAMESPACE_DECL)
4851 error ("cannot initialize %qD to namespace %qD", decl, init);
4855 if (current_class_type
4856 && CP_DECL_CONTEXT (decl) == current_class_type
4857 && TYPE_BEING_DEFINED (current_class_type)
4858 && (DECL_INITIAL (decl) || init))
4859 DECL_INITIALIZED_IN_CLASS_P (decl) = 1;
4861 type = TREE_TYPE (decl);
4863 if (type == error_mark_node)
4866 if (TYPE_HAS_MUTABLE_P (type))
4867 TREE_READONLY (decl) = 0;
4869 if (processing_template_decl)
4871 /* Add this declaration to the statement-tree. */
4872 if (at_function_scope_p ())
4873 add_decl_expr (decl);
4875 if (init && DECL_INITIAL (decl))
4876 DECL_INITIAL (decl) = init;
4877 if (TREE_CODE (decl) == VAR_DECL
4878 && !DECL_PRETTY_FUNCTION_P (decl)
4879 && !dependent_type_p (TREE_TYPE (decl)))
4880 maybe_deduce_size_from_array_init (decl, init);
4885 /* Parameters are handled by store_parm_decls, not cp_finish_decl. */
4886 gcc_assert (TREE_CODE (decl) != PARM_DECL);
4888 /* Take care of TYPE_DECLs up front. */
4889 if (TREE_CODE (decl) == TYPE_DECL)
4891 if (type != error_mark_node
4892 && IS_AGGR_TYPE (type) && DECL_NAME (decl))
4894 if (TREE_TYPE (DECL_NAME (decl)) && TREE_TYPE (decl) != type)
4895 warning ("shadowing previous type declaration of %q#D", decl);
4896 set_identifier_type_value (DECL_NAME (decl), decl);
4899 /* If we have installed this as the canonical typedef for this
4900 type, and that type has not been defined yet, delay emitting
4901 the debug information for it, as we will emit it later. */
4902 if (TYPE_MAIN_DECL (TREE_TYPE (decl)) == decl
4903 && !COMPLETE_TYPE_P (TREE_TYPE (decl)))
4904 TYPE_DECL_SUPPRESS_DEBUG (decl) = 1;
4906 rest_of_decl_compilation (decl, DECL_CONTEXT (decl) == NULL_TREE,
4911 if (TREE_CODE (decl) != FUNCTION_DECL)
4912 ttype = target_type (type);
4915 /* Currently, GNU C++ puts constants in text space, making them
4916 impossible to initialize. In the future, one would hope for
4917 an operating system which understood the difference between
4918 initialization and the running of a program. */
4919 if (! DECL_EXTERNAL (decl) && TREE_READONLY (decl))
4922 if (TYPE_NEEDS_CONSTRUCTING (type)
4923 || TREE_CODE (type) == REFERENCE_TYPE)
4924 TREE_READONLY (decl) = 0;
4927 if (TREE_CODE (decl) == VAR_DECL)
4929 /* Only PODs can have thread-local storage. Other types may require
4930 various kinds of non-trivial initialization. */
4931 if (DECL_THREAD_LOCAL (decl) && !pod_type_p (TREE_TYPE (decl)))
4932 error ("%qD cannot be thread-local because it has non-POD type %qT",
4933 decl, TREE_TYPE (decl));
4934 /* Convert the initializer to the type of DECL, if we have not
4935 already initialized DECL. */
4936 if (!DECL_INITIALIZED_P (decl)
4937 /* If !DECL_EXTERNAL then DECL is being defined. In the
4938 case of a static data member initialized inside the
4939 class-specifier, there can be an initializer even if DECL
4940 is *not* defined. */
4941 && (!DECL_EXTERNAL (decl) || init))
4943 init = check_initializer (decl, init, flags, &cleanup);
4944 /* Thread-local storage cannot be dynamically initialized. */
4945 if (DECL_THREAD_LOCAL (decl) && init)
4947 error ("%qD is thread-local and so cannot be dynamically "
4948 "initialized", decl);
4955 The memory occupied by any object of static storage
4956 duration is zero-initialized at program startup before
4957 any other initialization takes place.
4959 We cannot create an appropriate initializer until after
4960 the type of DECL is finalized. If DECL_INITIAL is set,
4961 then the DECL is statically initialized, and any
4962 necessary zero-initialization has already been performed. */
4963 if (TREE_STATIC (decl) && !DECL_INITIAL (decl))
4964 DECL_INITIAL (decl) = build_zero_init (TREE_TYPE (decl),
4965 /*nelts=*/NULL_TREE,
4966 /*static_storage_p=*/true);
4967 /* Remember that the initialization for this variable has
4969 DECL_INITIALIZED_P (decl) = 1;
4970 /* This declaration is the definition of this variable,
4971 unless we are initializing a static data member within
4972 the class specifier. */
4973 if (!DECL_EXTERNAL (decl))
4974 var_definition_p = true;
4975 /* The variable is being defined, so determine its
4977 determine_visibility (decl);
4979 /* If the variable has an array type, lay out the type, even if
4980 there is no initializer. It is valid to index through the
4981 array, and we must get TYPE_ALIGN set correctly on the array
4983 else if (TREE_CODE (type) == ARRAY_TYPE)
4987 /* Add this declaration to the statement-tree. This needs to happen
4988 after the call to check_initializer so that the DECL_EXPR for a
4989 reference temp is added before the DECL_EXPR for the reference itself. */
4990 if (at_function_scope_p ())
4991 add_decl_expr (decl);
4993 if (TREE_CODE (decl) == VAR_DECL)
4994 layout_var_decl (decl);
4996 /* Output the assembler code and/or RTL code for variables and functions,
4997 unless the type is an undefined structure or union.
4998 If not, it will get done when the type is completed. */
4999 if (TREE_CODE (decl) == VAR_DECL || TREE_CODE (decl) == FUNCTION_DECL)
5001 if (TREE_CODE (decl) == VAR_DECL)
5002 maybe_commonize_var (decl);
5004 make_rtl_for_nonlocal_decl (decl, init, asmspec);
5006 /* Check for abstractness of the type. Notice that there is no
5007 need to strip array types here since the check for those types
5008 is already done within create_array_type_for_decl. */
5009 if (TREE_CODE (type) == FUNCTION_TYPE
5010 || TREE_CODE (type) == METHOD_TYPE)
5011 abstract_virtuals_error (decl, TREE_TYPE (type));
5013 abstract_virtuals_error (decl, type);
5015 if (TREE_CODE (decl) == FUNCTION_DECL
5016 || TREE_TYPE (decl) == error_mark_node)
5017 /* No initialization required. */
5019 else if (DECL_EXTERNAL (decl)
5020 && ! (DECL_LANG_SPECIFIC (decl)
5021 && DECL_NOT_REALLY_EXTERN (decl)))
5024 DECL_INITIAL (decl) = init;
5028 /* A variable definition. */
5029 if (DECL_FUNCTION_SCOPE_P (decl))
5031 /* Initialize the local variable. */
5032 if (processing_template_decl)
5034 if (init || DECL_INITIAL (decl) == error_mark_node)
5035 DECL_INITIAL (decl) = init;
5037 else if (!TREE_STATIC (decl))
5038 initialize_local_var (decl, init);
5041 /* If a variable is defined, and then a subsequent
5042 definition with external linkage is encountered, we will
5043 get here twice for the same variable. We want to avoid
5044 calling expand_static_init more than once. For variables
5045 that are not static data members, we can call
5046 expand_static_init only when we actually process the
5047 initializer. It is not legal to redeclare a static data
5048 member, so this issue does not arise in that case. */
5049 if (var_definition_p && TREE_STATIC (decl))
5050 expand_static_init (decl, init);
5054 /* If a CLEANUP_STMT was created to destroy a temporary bound to a
5055 reference, insert it in the statement-tree now. */
5057 push_cleanup (decl, cleanup, false);
5062 TREE_READONLY (decl) = 1;
5064 /* If this was marked 'used', be sure it will be output. */
5065 if (lookup_attribute ("used", DECL_ATTRIBUTES (decl)))
5066 mark_decl_referenced (decl);
5069 /* This is here for a midend callback from c-common.c. */
5072 finish_decl (tree decl, tree init, tree asmspec_tree)
5074 cp_finish_decl (decl, init, asmspec_tree, 0);
5077 /* Returns a declaration for a VAR_DECL as if:
5079 extern "C" TYPE NAME;
5081 had been seen. Used to create compiler-generated global
5085 declare_global_var (tree name, tree type)
5089 push_to_top_level ();
5090 decl = build_decl (VAR_DECL, name, type);
5091 TREE_PUBLIC (decl) = 1;
5092 DECL_EXTERNAL (decl) = 1;
5093 DECL_ARTIFICIAL (decl) = 1;
5094 /* If the user has explicitly declared this variable (perhaps
5095 because the code we are compiling is part of a low-level runtime
5096 library), then it is possible that our declaration will be merged
5097 with theirs by pushdecl. */
5098 decl = pushdecl (decl);
5099 cp_finish_decl (decl, NULL_TREE, NULL_TREE, 0);
5100 pop_from_top_level ();
5105 /* Returns a pointer to the `atexit' function. Note that if
5106 FLAG_USE_CXA_ATEXIT is nonzero, then this will actually be the new
5107 `__cxa_atexit' function specified in the IA64 C++ ABI. */
5110 get_atexit_node (void)
5121 if (flag_use_cxa_atexit)
5123 /* The declaration for `__cxa_atexit' is:
5125 int __cxa_atexit (void (*)(void *), void *, void *)
5127 We build up the argument types and then then function type
5130 /* First, build the pointer-to-function type for the first
5132 arg_types = tree_cons (NULL_TREE, ptr_type_node, void_list_node);
5133 fn_type = build_function_type (void_type_node, arg_types);
5134 fn_ptr_type = build_pointer_type (fn_type);
5135 /* Then, build the rest of the argument types. */
5136 arg_types = tree_cons (NULL_TREE, ptr_type_node, void_list_node);
5137 arg_types = tree_cons (NULL_TREE, ptr_type_node, arg_types);
5138 arg_types = tree_cons (NULL_TREE, fn_ptr_type, arg_types);
5139 /* And the final __cxa_atexit type. */
5140 fn_type = build_function_type (integer_type_node, arg_types);
5141 fn_ptr_type = build_pointer_type (fn_type);
5142 name = "__cxa_atexit";
5146 /* The declaration for `atexit' is:
5148 int atexit (void (*)());
5150 We build up the argument types and then then function type
5152 fn_type = build_function_type (void_type_node, void_list_node);
5153 fn_ptr_type = build_pointer_type (fn_type);
5154 arg_types = tree_cons (NULL_TREE, fn_ptr_type, void_list_node);
5155 /* Build the final atexit type. */
5156 fn_type = build_function_type (integer_type_node, arg_types);
5160 /* Now, build the function declaration. */
5161 push_lang_context (lang_name_c);
5162 atexit_fndecl = build_library_fn_ptr (name, fn_type);
5163 mark_used (atexit_fndecl);
5164 pop_lang_context ();
5165 atexit_node = decay_conversion (atexit_fndecl);
5170 /* Returns the __dso_handle VAR_DECL. */
5173 get_dso_handle_node (void)
5175 if (dso_handle_node)
5176 return dso_handle_node;
5178 /* Declare the variable. */
5179 dso_handle_node = declare_global_var (get_identifier ("__dso_handle"),
5182 return dso_handle_node;
5185 /* Begin a new function with internal linkage whose job will be simply
5186 to destroy some particular variable. */
5188 static GTY(()) int start_cleanup_cnt;
5191 start_cleanup_fn (void)
5198 push_to_top_level ();
5200 /* No need to mangle this. */
5201 push_lang_context (lang_name_c);
5203 /* Build the parameter-types. */
5204 parmtypes = void_list_node;
5205 /* Functions passed to __cxa_atexit take an additional parameter.
5206 We'll just ignore it. After we implement the new calling
5207 convention for destructors, we can eliminate the use of
5208 additional cleanup functions entirely in the -fnew-abi case. */
5209 if (flag_use_cxa_atexit)
5210 parmtypes = tree_cons (NULL_TREE, ptr_type_node, parmtypes);
5211 /* Build the function type itself. */
5212 fntype = build_function_type (void_type_node, parmtypes);
5213 /* Build the name of the function. */
5214 sprintf (name, "__tcf_%d", start_cleanup_cnt++);
5215 /* Build the function declaration. */
5216 fndecl = build_lang_decl (FUNCTION_DECL, get_identifier (name), fntype);
5217 /* It's a function with internal linkage, generated by the
5219 TREE_PUBLIC (fndecl) = 0;
5220 DECL_ARTIFICIAL (fndecl) = 1;
5221 /* Make the function `inline' so that it is only emitted if it is
5222 actually needed. It is unlikely that it will be inlined, since
5223 it is only called via a function pointer, but we avoid unnecessary
5224 emissions this way. */
5225 DECL_INLINE (fndecl) = 1;
5226 DECL_DECLARED_INLINE_P (fndecl) = 1;
5227 DECL_INTERFACE_KNOWN (fndecl) = 1;
5228 /* Build the parameter. */
5229 if (flag_use_cxa_atexit)
5233 parmdecl = cp_build_parm_decl (NULL_TREE, ptr_type_node);
5234 DECL_CONTEXT (parmdecl) = fndecl;
5235 TREE_USED (parmdecl) = 1;
5236 DECL_ARGUMENTS (fndecl) = parmdecl;
5240 start_preparsed_function (fndecl, NULL_TREE, SF_PRE_PARSED);
5242 pop_lang_context ();
5244 return current_function_decl;
5247 /* Finish the cleanup function begun by start_cleanup_fn. */
5250 end_cleanup_fn (void)
5252 expand_or_defer_fn (finish_function (0));
5254 pop_from_top_level ();
5257 /* Generate code to handle the destruction of DECL, an object with
5258 static storage duration. */
5261 register_dtor_fn (tree decl)
5268 if (TYPE_HAS_TRIVIAL_DESTRUCTOR (TREE_TYPE (decl)))
5269 return void_zero_node;
5271 /* Call build_cleanup before we enter the anonymous function so that
5272 any access checks will be done relative to the current scope,
5273 rather than the scope of the anonymous function. */
5274 build_cleanup (decl);
5276 /* Now start the function. */
5277 cleanup = start_cleanup_fn ();
5279 /* Now, recompute the cleanup. It may contain SAVE_EXPRs that refer
5280 to the original function, rather than the anonymous one. That
5281 will make the back-end think that nested functions are in use,
5282 which causes confusion. */
5284 push_deferring_access_checks (dk_no_check);
5285 fcall = build_cleanup (decl);
5286 pop_deferring_access_checks ();
5288 /* Create the body of the anonymous function. */
5289 compound_stmt = begin_compound_stmt (BCS_FN_BODY);
5290 finish_expr_stmt (fcall);
5291 finish_compound_stmt (compound_stmt);
5294 /* Call atexit with the cleanup function. */
5295 cxx_mark_addressable (cleanup);
5296 mark_used (cleanup);
5297 cleanup = build_unary_op (ADDR_EXPR, cleanup, 0);
5298 if (flag_use_cxa_atexit)
5300 args = tree_cons (NULL_TREE,
5301 build_unary_op (ADDR_EXPR, get_dso_handle_node (), 0),
5303 args = tree_cons (NULL_TREE, null_pointer_node, args);
5304 args = tree_cons (NULL_TREE, cleanup, args);
5307 args = tree_cons (NULL_TREE, cleanup, NULL_TREE);
5308 return build_function_call (get_atexit_node (), args);
5311 /* DECL is a VAR_DECL with static storage duration. INIT, if present,
5312 is its initializer. Generate code to handle the construction
5313 and destruction of DECL. */
5316 expand_static_init (tree decl, tree init)
5318 gcc_assert (TREE_CODE (decl) == VAR_DECL);
5319 gcc_assert (TREE_STATIC (decl));
5321 /* Some variables require no initialization. */
5323 && !TYPE_NEEDS_CONSTRUCTING (TREE_TYPE (decl))
5324 && TYPE_HAS_TRIVIAL_DESTRUCTOR (TREE_TYPE (decl)))
5327 if (DECL_FUNCTION_SCOPE_P (decl))
5329 /* Emit code to perform this initialization but once. */
5330 tree if_stmt = NULL_TREE, inner_if_stmt = NULL_TREE;
5331 tree then_clause = NULL_TREE, inner_then_clause = NULL_TREE;
5332 tree guard, guard_addr, guard_addr_list;
5333 tree acquire_fn, release_fn, abort_fn;
5336 /* Emit code to perform this initialization but once. This code
5339 static <type> guard;
5340 if (!guard.first_byte) {
5341 if (__cxa_guard_acquire (&guard)) {
5344 // Do initialization.
5345 flag = true; __cxa_guard_release (&guard);
5346 // Register variable for destruction at end of program.
5348 if (!flag) __cxa_guard_abort (&guard);
5352 Note that the `flag' variable is only set to 1 *after* the
5353 initialization is complete. This ensures that an exception,
5354 thrown during the construction, will cause the variable to
5355 reinitialized when we pass through this code again, as per:
5359 If the initialization exits by throwing an exception, the
5360 initialization is not complete, so it will be tried again
5361 the next time control enters the declaration.
5363 This process should be thread-safe, too; multiple threads
5364 should not be able to initialize the variable more than
5367 /* Create the guard variable. */
5368 guard = get_guard (decl);
5370 /* This optimization isn't safe on targets with relaxed memory
5371 consistency. On such targets we force synchronization in
5372 __cxa_guard_acquire. */
5373 if (!targetm.relaxed_ordering || !flag_threadsafe_statics)
5375 /* Begin the conditional initialization. */
5376 if_stmt = begin_if_stmt ();
5377 finish_if_stmt_cond (get_guard_cond (guard), if_stmt);
5378 then_clause = begin_compound_stmt (BCS_NO_SCOPE);
5381 if (flag_threadsafe_statics)
5383 guard_addr = build_address (guard);
5384 guard_addr_list = build_tree_list (NULL_TREE, guard_addr);
5386 acquire_fn = get_identifier ("__cxa_guard_acquire");
5387 release_fn = get_identifier ("__cxa_guard_release");
5388 abort_fn = get_identifier ("__cxa_guard_abort");
5389 if (!get_global_value_if_present (acquire_fn, &acquire_fn))
5391 tree argtypes = tree_cons (NULL_TREE, TREE_TYPE (guard_addr),
5393 tree vfntype = build_function_type (void_type_node, argtypes);
5394 acquire_fn = push_library_fn
5395 (acquire_fn, build_function_type (integer_type_node, argtypes));
5396 release_fn = push_library_fn (release_fn, vfntype);
5397 abort_fn = push_library_fn (abort_fn, vfntype);
5401 release_fn = identifier_global_value (release_fn);
5402 abort_fn = identifier_global_value (abort_fn);
5405 inner_if_stmt = begin_if_stmt ();
5406 finish_if_stmt_cond (build_call (acquire_fn, guard_addr_list),
5409 inner_then_clause = begin_compound_stmt (BCS_NO_SCOPE);
5410 begin = get_target_expr (boolean_false_node);
5411 flag = TARGET_EXPR_SLOT (begin);
5413 TARGET_EXPR_CLEANUP (begin)
5414 = build (COND_EXPR, void_type_node, flag,
5416 build_call (abort_fn, guard_addr_list));
5417 CLEANUP_EH_ONLY (begin) = 1;
5419 /* Do the initialization itself. */
5420 init = add_stmt_to_compound (begin, init);
5421 init = add_stmt_to_compound
5422 (init, build (MODIFY_EXPR, void_type_node, flag, boolean_true_node));
5423 init = add_stmt_to_compound
5424 (init, build_call (release_fn, guard_addr_list));
5427 init = add_stmt_to_compound (init, set_guard (guard));
5429 /* Use atexit to register a function for destroying this static
5431 init = add_stmt_to_compound (init, register_dtor_fn (decl));
5433 finish_expr_stmt (init);
5435 if (flag_threadsafe_statics)
5437 finish_compound_stmt (inner_then_clause);
5438 finish_then_clause (inner_if_stmt);
5439 finish_if_stmt (inner_if_stmt);
5442 if (!targetm.relaxed_ordering || !flag_threadsafe_statics)
5444 finish_compound_stmt (then_clause);
5445 finish_then_clause (if_stmt);
5446 finish_if_stmt (if_stmt);
5450 static_aggregates = tree_cons (init, decl, static_aggregates);
5454 /* Make TYPE a complete type based on INITIAL_VALUE.
5455 Return 0 if successful, 1 if INITIAL_VALUE can't be deciphered,
5456 2 if there was no information (in which case assume 0 if DO_DEFAULT). */
5459 complete_array_type (tree type, tree initial_value, int do_default)
5461 tree maxindex = NULL_TREE;
5466 /* An array of character type can be initialized from a
5467 brace-enclosed string constant. */
5468 if (char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (type)))
5469 && TREE_CODE (initial_value) == CONSTRUCTOR
5470 && CONSTRUCTOR_ELTS (initial_value)
5471 && (TREE_CODE (TREE_VALUE (CONSTRUCTOR_ELTS (initial_value)))
5473 && TREE_CHAIN (CONSTRUCTOR_ELTS (initial_value)) == NULL_TREE)
5474 initial_value = TREE_VALUE (CONSTRUCTOR_ELTS (initial_value));
5476 /* Note MAXINDEX is really the maximum index, one less than the
5478 if (TREE_CODE (initial_value) == STRING_CST)
5481 = int_size_in_bytes (TREE_TYPE (TREE_TYPE (initial_value)));
5482 maxindex = build_int_cst (NULL_TREE,
5483 (TREE_STRING_LENGTH (initial_value)
5486 else if (TREE_CODE (initial_value) == CONSTRUCTOR)
5488 tree elts = CONSTRUCTOR_ELTS (initial_value);
5490 maxindex = ssize_int (-1);
5491 for (; elts; elts = TREE_CHAIN (elts))
5493 if (TREE_PURPOSE (elts))
5494 maxindex = TREE_PURPOSE (elts);
5496 maxindex = size_binop (PLUS_EXPR, maxindex, ssize_int (1));
5501 /* Make an error message unless that happened already. */
5502 if (initial_value != error_mark_node)
5505 initial_value = NULL_TREE;
5507 /* Prevent further error messages. */
5508 maxindex = build_int_cst (NULL_TREE, 0);
5515 maxindex = build_int_cst (NULL_TREE, 0);
5525 domain = build_index_type (maxindex);
5526 TYPE_DOMAIN (type) = domain;
5529 itype = TREE_TYPE (initial_value);
5532 if (itype && !TYPE_DOMAIN (itype))
5533 TYPE_DOMAIN (itype) = domain;
5534 /* The type of the main variant should never be used for arrays
5535 of different sizes. It should only ever be completed with the
5536 size of the array. */
5537 if (! TYPE_DOMAIN (TYPE_MAIN_VARIANT (type)))
5538 TYPE_DOMAIN (TYPE_MAIN_VARIANT (type)) = domain;
5540 elt_type = TREE_TYPE (type);
5541 TYPE_NEEDS_CONSTRUCTING (type)
5542 = TYPE_NEEDS_CONSTRUCTING (TYPE_MAIN_VARIANT (elt_type));
5543 TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type)
5544 = TYPE_HAS_NONTRIVIAL_DESTRUCTOR (TYPE_MAIN_VARIANT (elt_type));
5547 /* Lay out the type now that we can get the real answer. */
5554 /* Return zero if something is declared to be a member of type
5555 CTYPE when in the context of CUR_TYPE. STRING is the error
5556 message to print in that case. Otherwise, quietly return 1. */
5559 member_function_or_else (tree ctype, tree cur_type, enum overload_flags flags)
5561 if (ctype && ctype != cur_type)
5563 if (flags == DTOR_FLAG)
5564 error ("destructor for alien class %qT cannot be a member", ctype);
5566 error ("constructor for alien class %qT cannot be a member", ctype);
5572 /* Subroutine of `grokdeclarator'. */
5574 /* Generate errors possibly applicable for a given set of specifiers.
5575 This is for ARM $7.1.2. */
5578 bad_specifiers (tree object,
5587 error ("%qD declared as a %<virtual%> %s", object, type);
5589 error ("%qD declared as an %<inline%> %s", object, type);
5591 error ("%<const%> and %<volatile%> function specifiers on "
5592 "%qD invalid in %s declaration",
5595 cp_error_at ("%qD declared as a friend", object);
5597 && (TREE_CODE (object) == TYPE_DECL
5598 || (!TYPE_PTRFN_P (TREE_TYPE (object))
5599 && !TYPE_REFFN_P (TREE_TYPE (object))
5600 && !TYPE_PTRMEMFUNC_P (TREE_TYPE (object)))))
5601 cp_error_at ("%qD declared with an exception specification", object);
5604 /* CTYPE is class type, or null if non-class.
5605 TYPE is type this FUNCTION_DECL should have, either FUNCTION_TYPE
5607 DECLARATOR is the function's name.
5608 PARMS is a chain of PARM_DECLs for the function.
5609 VIRTUALP is truthvalue of whether the function is virtual or not.
5610 FLAGS are to be passed through to `grokclassfn'.
5611 QUALS are qualifiers indicating whether the function is `const'
5613 RAISES is a list of exceptions that this function can raise.
5614 CHECK is 1 if we must find this method in CTYPE, 0 if we should
5615 not look, and -1 if we should not call `grokclassfn' at all.
5617 Returns `NULL_TREE' if something goes wrong, after issuing
5618 applicable error messages. */
5621 grokfndecl (tree ctype,
5625 tree orig_declarator,
5627 enum overload_flags flags,
5640 int staticp = ctype && TREE_CODE (type) == FUNCTION_TYPE;
5641 int has_default_arg = 0;
5645 type = build_exception_variant (type, raises);
5647 decl = build_lang_decl (FUNCTION_DECL, declarator, type);
5648 DECL_ARGUMENTS (decl) = parms;
5649 /* Propagate volatile out from type to decl. */
5650 if (TYPE_VOLATILE (type))
5651 TREE_THIS_VOLATILE (decl) = 1;
5653 /* If this decl has namespace scope, set that up. */
5655 set_decl_namespace (decl, in_namespace, friendp);
5657 DECL_CONTEXT (decl) = FROB_CONTEXT (current_namespace);
5659 /* `main' and builtins have implicit 'C' linkage. */
5660 if ((MAIN_NAME_P (declarator)
5661 || (IDENTIFIER_LENGTH (declarator) > 10
5662 && IDENTIFIER_POINTER (declarator)[0] == '_'
5663 && IDENTIFIER_POINTER (declarator)[1] == '_'
5664 && strncmp (IDENTIFIER_POINTER (declarator)+2, "builtin_", 8) == 0))
5665 && current_lang_name == lang_name_cplusplus
5666 && ctype == NULL_TREE
5667 /* NULL_TREE means global namespace. */
5668 && DECL_CONTEXT (decl) == NULL_TREE)
5669 SET_DECL_LANGUAGE (decl, lang_c);
5671 /* Should probably propagate const out from type to decl I bet (mrs). */
5674 DECL_STATIC_FUNCTION_P (decl) = 1;
5675 DECL_CONTEXT (decl) = ctype;
5679 DECL_CONTEXT (decl) = ctype;
5681 if (ctype == NULL_TREE && DECL_MAIN_P (decl))
5683 if (processing_template_decl)
5684 error ("cannot declare %<::main%> to be a template");
5686 error ("cannot declare %<::main%> to be inline");
5688 error ("cannot declare %<::main%> to be static");
5689 if (!same_type_p (TREE_TYPE (TREE_TYPE (decl)),
5692 error ("%<::main%> must return %<int%>");
5693 TREE_TYPE (TREE_TYPE (decl)) = integer_type_node;
5699 /* Members of anonymous types and local classes have no linkage; make
5700 them internal. If a typedef is made later, this will be changed. */
5701 if (ctype && (TYPE_ANONYMOUS_P (ctype)
5702 || decl_function_context (TYPE_MAIN_DECL (ctype))))
5707 /* [basic.link]: A name with no linkage (notably, the name of a class
5708 or enumeration declared in a local scope) shall not be used to
5709 declare an entity with linkage.
5711 Only check this for public decls for now. See core 319, 389. */
5712 t = no_linkage_check (TREE_TYPE (decl),
5713 /*relaxed_p=*/false);
5716 if (TYPE_ANONYMOUS_P (t))
5718 if (DECL_EXTERN_C_P (decl))
5719 /* Allow this; it's pretty common in C. */;
5722 pedwarn ("non-local function %q#D uses anonymous type",
5724 if (DECL_ORIGINAL_TYPE (TYPE_NAME (t)))
5725 cp_pedwarn_at ("%q#D does not refer to the unqualified "
5726 "type, so it is not used for linkage",
5731 pedwarn ("non-local function %q#D uses local type %qT", decl, t);
5735 TREE_PUBLIC (decl) = publicp;
5738 DECL_INTERFACE_KNOWN (decl) = 1;
5739 DECL_NOT_REALLY_EXTERN (decl) = 1;
5742 /* If the declaration was declared inline, mark it as such. */
5744 DECL_DECLARED_INLINE_P (decl) = 1;
5745 /* We inline functions that are explicitly declared inline, or, when
5746 the user explicitly asks us to, all functions. */
5747 if (DECL_DECLARED_INLINE_P (decl)
5748 || (flag_inline_trees == 2 && !DECL_INLINE (decl) && funcdef_flag))
5749 DECL_INLINE (decl) = 1;
5751 DECL_EXTERNAL (decl) = 1;
5752 if (quals && TREE_CODE (type) == FUNCTION_TYPE)
5754 error ("%smember function %qD cannot have cv-qualifier",
5755 (ctype ? "static " : "non-"), decl);
5756 quals = TYPE_UNQUALIFIED;
5759 if (IDENTIFIER_OPNAME_P (DECL_NAME (decl)))
5760 grok_op_properties (decl, friendp, /*complain=*/true);
5762 if (ctype && decl_function_context (decl))
5763 DECL_NO_STATIC_CHAIN (decl) = 1;
5765 for (t = TYPE_ARG_TYPES (TREE_TYPE (decl)); t; t = TREE_CHAIN (t))
5766 if (TREE_PURPOSE (t)
5767 && TREE_CODE (TREE_PURPOSE (t)) == DEFAULT_ARG)
5769 has_default_arg = 1;
5774 && TREE_CODE (orig_declarator) == TEMPLATE_ID_EXPR)
5778 ("defining explicit specialization %qD in friend declaration",
5782 tree fns = TREE_OPERAND (orig_declarator, 0);
5783 tree args = TREE_OPERAND (orig_declarator, 1);
5785 if (PROCESSING_REAL_TEMPLATE_DECL_P ())
5787 /* Something like `template <class T> friend void f<T>()'. */
5788 error ("invalid use of template-id %qD in declaration "
5789 "of primary template",
5795 /* A friend declaration of the form friend void f<>(). Record
5796 the information in the TEMPLATE_ID_EXPR. */
5797 SET_DECL_IMPLICIT_INSTANTIATION (decl);
5799 if (TREE_CODE (fns) == COMPONENT_REF)
5801 /* Due to bison parser ickiness, we will have already looked
5802 up an operator_name or PFUNCNAME within the current class
5803 (see template_id in parse.y). If the current class contains
5804 such a name, we'll get a COMPONENT_REF here. Undo that. */
5806 gcc_assert (TREE_TYPE (TREE_OPERAND (fns, 0))
5807 == current_class_type);
5808 fns = TREE_OPERAND (fns, 1);
5810 gcc_assert (TREE_CODE (fns) == IDENTIFIER_NODE
5811 || TREE_CODE (fns) == OVERLOAD);
5812 DECL_TEMPLATE_INFO (decl) = tree_cons (fns, args, NULL_TREE);
5814 if (has_default_arg)
5816 error ("default arguments are not allowed in declaration "
5817 "of friend template specialization %qD",
5824 error ("%<inline%> is not allowed in declaration of friend "
5825 "template specialization %qD",
5833 /* Make the init_value nonzero so pushdecl knows this is not
5834 tentative. error_mark_node is replaced later with the BLOCK. */
5835 DECL_INITIAL (decl) = error_mark_node;
5837 if (TYPE_NOTHROW_P (type) || nothrow_libfn_p (decl))
5838 TREE_NOTHROW (decl) = 1;
5840 /* Caller will do the rest of this. */
5844 if (flags == NO_SPECIAL && ctype && constructor_name_p (declarator, ctype))
5845 DECL_CONSTRUCTOR_P (decl) = 1;
5847 /* Function gets the ugly name, field gets the nice one. This call
5848 may change the type of the function (because of default
5850 if (ctype != NULL_TREE)
5851 grokclassfn (ctype, decl, flags, quals);
5853 decl = check_explicit_specialization (orig_declarator, decl,
5855 2 * (funcdef_flag != 0) +
5856 4 * (friendp != 0));
5857 if (decl == error_mark_node)
5862 cplus_decl_attributes (&decl, *attrlist, 0);
5863 *attrlist = NULL_TREE;
5866 if (ctype != NULL_TREE
5867 && (! TYPE_FOR_JAVA (ctype) || check_java_method (decl))
5872 old_decl = check_classfn (ctype, decl,
5873 (processing_template_decl
5874 > template_class_depth (ctype))
5875 ? current_template_parms
5878 if (old_decl && TREE_CODE (old_decl) == TEMPLATE_DECL)
5879 /* Because grokfndecl is always supposed to return a
5880 FUNCTION_DECL, we pull out the DECL_TEMPLATE_RESULT
5881 here. We depend on our callers to figure out that its
5882 really a template that's being returned. */
5883 old_decl = DECL_TEMPLATE_RESULT (old_decl);
5885 if (old_decl && DECL_STATIC_FUNCTION_P (old_decl)
5886 && TREE_CODE (TREE_TYPE (decl)) == METHOD_TYPE)
5887 /* Remove the `this' parm added by grokclassfn.
5888 XXX Isn't this done in start_function, too? */
5889 revert_static_member_fn (decl);
5890 if (old_decl && DECL_ARTIFICIAL (old_decl))
5891 error ("definition of implicitly-declared %qD", old_decl);
5898 /* Since we've smashed OLD_DECL to its
5899 DECL_TEMPLATE_RESULT, we must do the same to DECL. */
5900 if (TREE_CODE (decl) == TEMPLATE_DECL)
5901 decl = DECL_TEMPLATE_RESULT (decl);
5903 /* Attempt to merge the declarations. This can fail, in
5904 the case of some invalid specialization declarations. */
5905 pop_p = push_scope (ctype);
5906 ok = duplicate_decls (decl, old_decl);
5911 error ("no %q#D member function declared in class %qT",
5919 if (DECL_CONSTRUCTOR_P (decl) && !grok_ctor_properties (ctype, decl))
5922 if (ctype == NULL_TREE || check)
5926 DECL_VIRTUAL_P (decl) = 1;
5931 /* DECL is a VAR_DECL for a static data member. Set flags to reflect
5932 the linkage that DECL will receive in the object file. */
5935 set_linkage_for_static_data_member (tree decl)
5937 /* A static data member always has static storage duration and
5938 external linkage. Note that static data members are forbidden in
5939 local classes -- the only situation in which a class has
5940 non-external linkage. */
5941 TREE_PUBLIC (decl) = 1;
5942 TREE_STATIC (decl) = 1;
5943 /* For non-template classes, static data members are always put
5944 out in exactly those files where they are defined, just as
5945 with ordinary namespace-scope variables. */
5946 if (!processing_template_decl)
5947 DECL_INTERFACE_KNOWN (decl) = 1;
5950 /* Create a VAR_DECL named NAME with the indicated TYPE.
5952 If SCOPE is non-NULL, it is the class type or namespace containing
5953 the variable. If SCOPE is NULL, the variable should is created in
5954 the innermost enclosings scope. */
5957 grokvardecl (tree type,
5959 const cp_decl_specifier_seq *declspecs,
5965 tree explicit_scope;
5967 gcc_assert (!name || TREE_CODE (name) == IDENTIFIER_NODE);
5969 /* Compute the scope in which to place the variable, but remember
5970 whether or not that scope was explicitly specified by the user. */
5971 explicit_scope = scope;
5974 /* An explicit "extern" specifier indicates a namespace-scope
5976 if (declspecs->storage_class == sc_extern)
5977 scope = current_namespace;
5978 else if (!at_function_scope_p ())
5979 scope = current_scope ();
5983 && (/* If the variable is a namespace-scope variable declared in a
5984 template, we need DECL_LANG_SPECIFIC. */
5985 (TREE_CODE (scope) == NAMESPACE_DECL && processing_template_decl)
5986 /* Similarly for namespace-scope variables with language linkage
5988 || (TREE_CODE (scope) == NAMESPACE_DECL
5989 && current_lang_name != lang_name_cplusplus)
5990 /* Similarly for static data members. */
5992 decl = build_lang_decl (VAR_DECL, name, type);
5994 decl = build_decl (VAR_DECL, name, type);
5996 if (explicit_scope && TREE_CODE (explicit_scope) == NAMESPACE_DECL)
5997 set_decl_namespace (decl, explicit_scope, 0);
5999 DECL_CONTEXT (decl) = scope;
6001 if (declspecs->storage_class == sc_extern)
6003 DECL_THIS_EXTERN (decl) = 1;
6004 DECL_EXTERNAL (decl) = !initialized;
6007 if (DECL_CLASS_SCOPE_P (decl))
6009 set_linkage_for_static_data_member (decl);
6010 /* This function is only called with out-of-class definitions. */
6011 DECL_EXTERNAL (decl) = 0;
6013 /* At top level, either `static' or no s.c. makes a definition
6014 (perhaps tentative), and absence of `static' makes it public. */
6015 else if (toplevel_bindings_p ())
6017 TREE_PUBLIC (decl) = (declspecs->storage_class != sc_static
6018 && (DECL_THIS_EXTERN (decl) || ! constp));
6019 TREE_STATIC (decl) = ! DECL_EXTERNAL (decl);
6021 /* Not at top level, only `static' makes a static definition. */
6024 TREE_STATIC (decl) = declspecs->storage_class == sc_static;
6025 TREE_PUBLIC (decl) = DECL_EXTERNAL (decl);
6028 if (declspecs->specs[(int)ds_thread])
6030 if (targetm.have_tls)
6031 DECL_THREAD_LOCAL (decl) = 1;
6033 /* A mere warning is sure to result in improper semantics
6034 at runtime. Don't bother to allow this to compile. */
6035 error ("thread-local storage not supported for this target");
6038 if (TREE_PUBLIC (decl))
6040 /* [basic.link]: A name with no linkage (notably, the name of a class
6041 or enumeration declared in a local scope) shall not be used to
6042 declare an entity with linkage.
6044 Only check this for public decls for now. */
6045 tree t1 = TREE_TYPE (decl);
6046 tree t = no_linkage_check (t1, /*relaxed_p=*/false);
6049 if (TYPE_ANONYMOUS_P (t))
6051 if (DECL_EXTERN_C_P (decl))
6052 /* Allow this; it's pretty common in C. */
6054 else if (same_type_ignoring_top_level_qualifiers_p(t1, t))
6055 /* This is something like "enum { a = 3 } x;", which is
6056 well formed. The enum doesn't have "a name with no
6057 linkage", because it has no name. See closed CWG issue
6060 Note that while this construct is well formed in C++03
6061 it is likely to become ill formed in C++0x. See open
6062 CWG issue 389 and related issues. */
6066 /* It's a typedef referring to an anonymous type. */
6067 pedwarn ("non-local variable %q#D uses anonymous type",
6069 if (DECL_ORIGINAL_TYPE (TYPE_NAME (t)))
6070 cp_pedwarn_at ("%q#D does not refer to the unqualified "
6071 "type, so it is not used for linkage",
6076 pedwarn ("non-local variable %q#D uses local type %qT", decl, t);
6083 /* Create and return a canonical pointer to member function type, for
6084 TYPE, which is a POINTER_TYPE to a METHOD_TYPE. */
6087 build_ptrmemfunc_type (tree type)
6091 tree unqualified_variant = NULL_TREE;
6093 if (type == error_mark_node)
6096 /* If a canonical type already exists for this type, use it. We use
6097 this method instead of type_hash_canon, because it only does a
6098 simple equality check on the list of field members. */
6100 if ((t = TYPE_GET_PTRMEMFUNC_TYPE (type)))
6103 /* Make sure that we always have the unqualified pointer-to-member
6105 if (cp_type_quals (type) != TYPE_UNQUALIFIED)
6107 = build_ptrmemfunc_type (TYPE_MAIN_VARIANT (type));
6109 t = make_aggr_type (RECORD_TYPE);
6110 xref_basetypes (t, NULL_TREE);
6112 /* Let the front-end know this is a pointer to member function... */
6113 TYPE_PTRMEMFUNC_FLAG (t) = 1;
6114 /* ... and not really an aggregate. */
6115 SET_IS_AGGR_TYPE (t, 0);
6117 field = build_decl (FIELD_DECL, pfn_identifier, type);
6120 field = build_decl (FIELD_DECL, delta_identifier, delta_type_node);
6121 TREE_CHAIN (field) = fields;
6124 finish_builtin_struct (t, "__ptrmemfunc_type", fields, ptr_type_node);
6126 /* Zap out the name so that the back-end will give us the debugging
6127 information for this anonymous RECORD_TYPE. */
6128 TYPE_NAME (t) = NULL_TREE;
6130 /* If this is not the unqualified form of this pointer-to-member
6131 type, set the TYPE_MAIN_VARIANT for this type to be the
6132 unqualified type. Since they are actually RECORD_TYPEs that are
6133 not variants of each other, we must do this manually. */
6134 if (cp_type_quals (type) != TYPE_UNQUALIFIED)
6136 t = build_qualified_type (t, cp_type_quals (type));
6137 TYPE_MAIN_VARIANT (t) = unqualified_variant;
6138 TYPE_NEXT_VARIANT (t) = TYPE_NEXT_VARIANT (unqualified_variant);
6139 TYPE_NEXT_VARIANT (unqualified_variant) = t;
6142 /* Cache this pointer-to-member type so that we can find it again
6144 TYPE_SET_PTRMEMFUNC_TYPE (type, t);
6149 /* Create and return a pointer to data member type. */
6152 build_ptrmem_type (tree class_type, tree member_type)
6154 if (TREE_CODE (member_type) == METHOD_TYPE)
6158 arg_types = TYPE_ARG_TYPES (member_type);
6159 class_type = (cp_build_qualified_type
6161 cp_type_quals (TREE_TYPE (TREE_VALUE (arg_types)))));
6163 = build_method_type_directly (class_type,
6164 TREE_TYPE (member_type),
6165 TREE_CHAIN (arg_types));
6166 return build_ptrmemfunc_type (build_pointer_type (member_type));
6170 gcc_assert (TREE_CODE (member_type) != FUNCTION_TYPE);
6171 return build_offset_type (class_type, member_type);
6175 /* DECL is a VAR_DECL defined in-class, whose TYPE is also given.
6176 Check to see that the definition is valid. Issue appropriate error
6177 messages. Return 1 if the definition is particularly bad, or 0
6181 check_static_variable_definition (tree decl, tree type)
6183 /* Motion 10 at San Diego: If a static const integral data member is
6184 initialized with an integral constant expression, the initializer
6185 may appear either in the declaration (within the class), or in
6186 the definition, but not both. If it appears in the class, the
6187 member is a member constant. The file-scope definition is always
6189 if (!ARITHMETIC_TYPE_P (type) && TREE_CODE (type) != ENUMERAL_TYPE)
6191 error ("invalid in-class initialization of static data member "
6192 "of non-integral type %qT",
6194 /* If we just return the declaration, crashes will sometimes
6195 occur. We therefore return void_type_node, as if this were a
6196 friend declaration, to cause callers to completely ignore
6197 this declaration. */
6200 else if (!CP_TYPE_CONST_P (type))
6201 error ("ISO C++ forbids in-class initialization of non-const "
6202 "static member %qD",
6204 else if (pedantic && !INTEGRAL_TYPE_P (type))
6205 pedwarn ("ISO C++ forbids initialization of member constant "
6206 "%qD of non-integral type %qT", decl, type);
6211 /* Given the SIZE (i.e., number of elements) in an array, compute an
6212 appropriate index type for the array. If non-NULL, NAME is the
6213 name of the thing being declared. */
6216 compute_array_index_type (tree name, tree size)
6218 tree type = TREE_TYPE (size);
6221 /* The array bound must be an integer type. */
6222 if (!dependent_type_p (type) && !INTEGRAL_TYPE_P (type))
6225 error ("size of array %qD has non-integral type %qT", name, type);
6227 error ("size of array has non-integral type %qT", type);
6228 size = integer_one_node;
6229 type = TREE_TYPE (size);
6232 if (abi_version_at_least (2)
6233 /* We should only handle value dependent expressions specially. */
6234 ? value_dependent_expression_p (size)
6235 /* But for abi-1, we handled all instances in templates. This
6236 effects the manglings produced. */
6237 : processing_template_decl)
6238 return build_index_type (build_min (MINUS_EXPR, sizetype,
6239 size, integer_one_node));
6241 /* The size might be the result of a cast. */
6242 STRIP_TYPE_NOPS (size);
6244 /* It might be a const variable or enumeration constant. */
6245 size = integral_constant_value (size);
6247 /* Normally, the array-bound will be a constant. */
6248 if (TREE_CODE (size) == INTEGER_CST)
6250 /* Check to see if the array bound overflowed. Make that an
6251 error, no matter how generous we're being. */
6252 int old_flag_pedantic_errors = flag_pedantic_errors;
6253 int old_pedantic = pedantic;
6254 pedantic = flag_pedantic_errors = 1;
6255 constant_expression_warning (size);
6256 pedantic = old_pedantic;
6257 flag_pedantic_errors = old_flag_pedantic_errors;
6259 /* An array must have a positive number of elements. */
6260 if (INT_CST_LT (size, integer_zero_node))
6263 error ("size of array %qD is negative", name);
6265 error ("size of array is negative");
6266 size = integer_one_node;
6268 /* As an extension we allow zero-sized arrays. We always allow
6269 them in system headers because glibc uses them. */
6270 else if (integer_zerop (size) && pedantic && !in_system_header)
6273 pedwarn ("ISO C++ forbids zero-size array %qD", name);
6275 pedwarn ("ISO C++ forbids zero-size array");
6278 else if (TREE_CONSTANT (size))
6280 /* `(int) &fn' is not a valid array bound. */
6282 error ("size of array %qD is not an integral constant-expression",
6285 error ("size of array is not an integral constant-expression");
6290 pedwarn ("ISO C++ forbids variable-size array %qD", name);
6292 pedwarn ("ISO C++ forbids variable-size array");
6295 if (processing_template_decl && !TREE_CONSTANT (size))
6296 /* A variable sized array. */
6297 itype = build_min (MINUS_EXPR, sizetype, size, integer_one_node);
6300 HOST_WIDE_INT saved_processing_template_decl;
6302 /* Compute the index of the largest element in the array. It is
6303 one less than the number of elements in the array. We save
6304 and restore PROCESSING_TEMPLATE_DECL so that computations in
6305 cp_build_binary_op will be appropriately folded. */
6306 saved_processing_template_decl = processing_template_decl;
6307 processing_template_decl = 0;
6308 itype = cp_build_binary_op (MINUS_EXPR,
6309 cp_convert (ssizetype, size),
6310 cp_convert (ssizetype, integer_one_node));
6311 itype = fold (itype);
6312 processing_template_decl = saved_processing_template_decl;
6314 if (!TREE_CONSTANT (itype))
6315 /* A variable sized array. */
6316 itype = variable_size (itype);
6317 /* Make sure that there was no overflow when creating to a signed
6318 index type. (For example, on a 32-bit machine, an array with
6319 size 2^32 - 1 is too big.) */
6320 else if (TREE_OVERFLOW (itype))
6322 error ("overflow in array dimension");
6323 TREE_OVERFLOW (itype) = 0;
6327 /* Create and return the appropriate index type. */
6328 return build_index_type (itype);
6331 /* Returns the scope (if any) in which the entity declared by
6332 DECLARATOR will be located. If the entity was declared with an
6333 unqualified name, NULL_TREE is returned. */
6336 get_scope_of_declarator (const cp_declarator *declarator)
6338 while (declarator && declarator->kind != cdk_id)
6339 declarator = declarator->declarator;
6341 /* If the declarator-id is a SCOPE_REF, the scope in which the
6342 declaration occurs is the first operand. */
6344 && declarator->u.id.qualifying_scope)
6345 return declarator->u.id.qualifying_scope;
6347 /* Otherwise, the declarator is not a qualified name; the entity will
6348 be declared in the current scope. */
6352 /* Returns an ARRAY_TYPE for an array with SIZE elements of the
6353 indicated TYPE. If non-NULL, NAME is the NAME of the declaration
6357 create_array_type_for_decl (tree name, tree type, tree size)
6359 tree itype = NULL_TREE;
6360 const char* error_msg;
6362 /* If things have already gone awry, bail now. */
6363 if (type == error_mark_node || size == error_mark_node)
6364 return error_mark_node;
6366 /* Assume that everything will go OK. */
6369 /* There are some types which cannot be array elements. */
6370 switch (TREE_CODE (type))
6373 error_msg = "array of void";
6377 error_msg = "array of functions";
6380 case REFERENCE_TYPE:
6381 error_msg = "array of references";
6385 error_msg = "array of function members";
6392 /* If something went wrong, issue an error-message and return. */
6396 error ("declaration of %qD as %s", name, error_msg);
6398 error ("creating %s", error_msg);
6400 return error_mark_node;
6405 The constant expressions that specify the bounds of the arrays
6406 can be omitted only for the first member of the sequence. */
6407 if (TREE_CODE (type) == ARRAY_TYPE && !TYPE_DOMAIN (type))
6410 error ("declaration of %qD as multidimensional array must "
6411 "have bounds for all dimensions except the first",
6414 error ("multidimensional array must have bounds for all "
6415 "dimensions except the first");
6417 return error_mark_node;
6420 /* Figure out the index type for the array. */
6422 itype = compute_array_index_type (name, size);
6425 T is called the array element type; this type shall not be [...] an
6426 abstract class type. */
6427 abstract_virtuals_error (name, type);
6429 return build_cplus_array_type (type, itype);
6432 /* Check that it's OK to declare a function with the indicated TYPE.
6433 SFK indicates the kind of special function (if any) that this
6434 function is. OPTYPE is the type given in a conversion operator
6435 declaration, or the class type for a constructor/destructor.
6436 Returns the actual return type of the function; that
6437 may be different than TYPE if an error occurs, or for certain
6438 special functions. */
6441 check_special_function_return_type (special_function_kind sfk,
6447 case sfk_constructor:
6449 error ("return type specification for constructor invalid");
6451 if (targetm.cxx.cdtor_returns_this () && !TYPE_FOR_JAVA (optype))
6452 type = build_pointer_type (optype);
6454 type = void_type_node;
6457 case sfk_destructor:
6459 error ("return type specification for destructor invalid");
6460 /* We can't use the proper return type here because we run into
6461 problems with ambiguous bases and covariant returns.
6462 Java classes are left unchanged because (void *) isn't a valid
6463 Java type, and we don't want to change the Java ABI. */
6464 if (targetm.cxx.cdtor_returns_this () && !TYPE_FOR_JAVA (optype))
6465 type = build_pointer_type (void_type_node);
6467 type = void_type_node;
6470 case sfk_conversion:
6471 if (type && !same_type_p (type, optype))
6472 error ("operator %qT declared to return %qT", optype, type);
6474 pedwarn ("return type specified for %<operator %T%>", optype);
6485 /* A variable or data member (whose unqualified name is IDENTIFIER)
6486 has been declared with the indicated TYPE. If the TYPE is not
6487 acceptable, issue an error message and return a type to use for
6488 error-recovery purposes. */
6491 check_var_type (tree identifier, tree type)
6493 if (VOID_TYPE_P (type))
6496 error ("unnamed variable or field declared void");
6497 else if (TREE_CODE (identifier) == IDENTIFIER_NODE)
6499 gcc_assert (!IDENTIFIER_OPNAME_P (identifier));
6500 error ("variable or field %qE declared void", identifier);
6503 error ("variable or field declared void");
6504 type = integer_type_node;
6510 /* Given declspecs and a declarator (abstract or otherwise), determine
6511 the name and type of the object declared and construct a DECL node
6514 DECLSPECS is a chain of tree_list nodes whose value fields
6515 are the storage classes and type specifiers.
6517 DECL_CONTEXT says which syntactic context this declaration is in:
6518 NORMAL for most contexts. Make a VAR_DECL or FUNCTION_DECL or TYPE_DECL.
6519 FUNCDEF for a function definition. Like NORMAL but a few different
6520 error messages in each case. Return value may be zero meaning
6521 this definition is too screwy to try to parse.
6522 MEMFUNCDEF for a function definition. Like FUNCDEF but prepares to
6523 handle member functions (which have FIELD context).
6524 Return value may be zero meaning this definition is too screwy to
6526 PARM for a parameter declaration (either within a function prototype
6527 or before a function body). Make a PARM_DECL, or return void_type_node.
6528 CATCHPARM for a parameter declaration before a catch clause.
6529 TYPENAME if for a typename (in a cast or sizeof).
6530 Don't make a DECL node; just return the ..._TYPE node.
6531 FIELD for a struct or union field; make a FIELD_DECL.
6532 BITFIELD for a field with specified width.
6533 INITIALIZED is 1 if the decl has an initializer.
6535 ATTRLIST is a pointer to the list of attributes, which may be NULL
6536 if there are none; *ATTRLIST may be modified if attributes from inside
6537 the declarator should be applied to the declaration.
6539 When this function is called, scoping variables (such as
6540 CURRENT_CLASS_TYPE) should reflect the scope in which the
6541 declaration occurs, not the scope in which the new declaration will
6542 be placed. For example, on:
6546 when grokdeclarator is called for `S::f', the CURRENT_CLASS_TYPE
6547 should not be `S'. */
6550 grokdeclarator (const cp_declarator *declarator,
6551 const cp_decl_specifier_seq *declspecs,
6552 enum decl_context decl_context,
6556 tree type = NULL_TREE;
6559 int virtualp, explicitp, friendp, inlinep, staticp;
6560 int explicit_int = 0;
6561 int explicit_char = 0;
6562 int defaulted_int = 0;
6563 tree dependant_name = NULL_TREE;
6565 tree typedef_decl = NULL_TREE;
6566 const char *name = NULL;
6567 tree typedef_type = NULL_TREE;
6568 int funcdef_flag = 0;
6569 cp_declarator_kind innermost_code = cdk_error;
6572 /* See the code below that used this. */
6573 tree decl_attr = NULL_TREE;
6576 /* Keep track of what sort of function is being processed
6577 so that we can warn about default return values, or explicit
6578 return values which do not match prescribed defaults. */
6579 special_function_kind sfk = sfk_none;
6581 tree dname = NULL_TREE;
6582 tree ctor_return_type = NULL_TREE;
6583 enum overload_flags flags = NO_SPECIAL;
6584 cp_cv_quals quals = TYPE_UNQUALIFIED;
6585 tree raises = NULL_TREE;
6586 int template_count = 0;
6587 tree returned_attrs = NULL_TREE;
6588 tree parms = NULL_TREE;
6589 const cp_declarator *id_declarator;
6590 /* The unqualified name of the declarator; either an
6591 IDENTIFIER_NODE, BIT_NOT_EXPR, or TEMPLATE_ID_EXPR. */
6592 tree unqualified_id;
6593 /* The class type, if any, in which this entity is located,
6594 or NULL_TREE if none. Note that this value may be different from
6595 the current class type; for example if an attempt is made to declare
6596 "A::f" inside "B", this value will be "A". */
6597 tree ctype = current_class_type;
6598 /* The NAMESPACE_DECL for the namespace in which this entity is
6599 located. If an unqualified name is used to declare the entity,
6600 this value will be NULL_TREE, even if the entity is located at
6602 tree in_namespace = NULL_TREE;
6604 cp_storage_class storage_class;
6605 bool unsigned_p, signed_p, short_p, long_p, thread_p;
6606 bool type_was_error_mark_node = false;
6608 signed_p = declspecs->specs[(int)ds_signed];
6609 unsigned_p = declspecs->specs[(int)ds_unsigned];
6610 short_p = declspecs->specs[(int)ds_short];
6611 long_p = declspecs->specs[(int)ds_long];
6612 thread_p = declspecs->specs[(int)ds_thread];
6614 if (decl_context == FUNCDEF)
6615 funcdef_flag = 1, decl_context = NORMAL;
6616 else if (decl_context == MEMFUNCDEF)
6617 funcdef_flag = -1, decl_context = FIELD;
6618 else if (decl_context == BITFIELD)
6619 bitfield = 1, decl_context = FIELD;
6621 /* Look inside a declarator for the name being declared
6622 and get it as a string, for an error message. */
6623 for (id_declarator = declarator;
6625 id_declarator = id_declarator->declarator)
6627 if (id_declarator->kind != cdk_id)
6628 innermost_code = id_declarator->kind;
6630 switch (id_declarator->kind)
6633 if (id_declarator->declarator
6634 && id_declarator->declarator->kind == cdk_id)
6636 sfk = id_declarator->declarator->u.id.sfk;
6637 if (sfk == sfk_destructor)
6644 tree qualifying_scope = id_declarator->u.id.qualifying_scope;
6645 tree decl = id_declarator->u.id.unqualified_name;
6648 if (qualifying_scope)
6650 if (TYPE_P (qualifying_scope))
6652 ctype = qualifying_scope;
6653 if (innermost_code != cdk_function
6654 && current_class_type
6655 && !UNIQUELY_DERIVED_FROM_P (ctype,
6656 current_class_type))
6658 error ("type %qT is not derived from type %qT",
6659 ctype, current_class_type);
6660 return error_mark_node;
6663 else if (TREE_CODE (qualifying_scope) == NAMESPACE_DECL)
6664 in_namespace = qualifying_scope;
6666 if (TREE_CODE (decl) == BASELINK)
6667 decl = BASELINK_FUNCTIONS (decl);
6668 if (decl == error_mark_node)
6669 return error_mark_node;
6670 switch (TREE_CODE (decl))
6674 tree type = TREE_OPERAND (decl, 0);
6675 type = constructor_name (type);
6676 name = IDENTIFIER_POINTER (type);
6680 case TEMPLATE_ID_EXPR:
6682 tree fns = TREE_OPERAND (decl, 0);
6685 if (TREE_CODE (dname) == COMPONENT_REF)
6686 dname = TREE_OPERAND (dname, 1);
6687 if (TREE_CODE (dname) != IDENTIFIER_NODE)
6689 gcc_assert (is_overloaded_fn (dname));
6690 dname = DECL_NAME (get_first_fn (dname));
6695 case IDENTIFIER_NODE:
6696 if (TREE_CODE (decl) == IDENTIFIER_NODE)
6699 if (C_IS_RESERVED_WORD (dname))
6701 error ("declarator-id missing; using reserved word %qD",
6703 name = IDENTIFIER_POINTER (dname);
6705 else if (!IDENTIFIER_TYPENAME_P (dname))
6706 name = IDENTIFIER_POINTER (dname);
6709 gcc_assert (flags == NO_SPECIAL);
6710 flags = TYPENAME_FLAG;
6711 ctor_return_type = TREE_TYPE (dname);
6712 sfk = sfk_conversion;
6713 if (is_typename_at_global_scope (dname))
6714 name = IDENTIFIER_POINTER (dname);
6716 name = "<invalid operator>";
6721 dname = constructor_name (TREE_TYPE (decl));
6722 name = IDENTIFIER_POINTER (dname);
6743 if (id_declarator->kind == cdk_id)
6747 /* A function definition's declarator must have the form of
6748 a function declarator. */
6750 if (funcdef_flag && innermost_code != cdk_function)
6753 if (((dname && IDENTIFIER_OPNAME_P (dname)) || flags == TYPENAME_FLAG)
6754 && innermost_code != cdk_function
6755 && ! (ctype && !declspecs->any_specifiers_p))
6757 error ("declaration of %qD as non-function", dname);
6758 return error_mark_node;
6761 /* Anything declared one level down from the top level
6762 must be one of the parameters of a function
6763 (because the body is at least two levels down). */
6765 /* This heuristic cannot be applied to C++ nodes! Fixed, however,
6766 by not allowing C++ class definitions to specify their parameters
6767 with xdecls (must be spec.d in the parmlist).
6769 Since we now wait to push a class scope until we are sure that
6770 we are in a legitimate method context, we must set oldcname
6771 explicitly (since current_class_name is not yet alive).
6773 We also want to avoid calling this a PARM if it is in a namespace. */
6775 if (decl_context == NORMAL && !toplevel_bindings_p ())
6777 struct cp_binding_level *b = current_binding_level;
6778 current_binding_level = b->level_chain;
6779 if (current_binding_level != 0 && toplevel_bindings_p ())
6780 decl_context = PARM;
6781 current_binding_level = b;
6785 name = decl_context == PARM ? "parameter" : "type name";
6787 /* If there were multiple types specified in the decl-specifier-seq,
6788 issue an error message. */
6789 if (declspecs->multiple_types_p)
6790 error ("two or more data types in declaration of %qs", name);
6791 /* Extract the basic type from the decl-specifier-seq. */
6792 type = declspecs->type;
6793 if (type == error_mark_node)
6796 type_was_error_mark_node = true;
6798 /* If the entire declaration is itself tagged as deprecated then
6799 suppress reports of deprecated items. */
6800 if (type && TREE_DEPRECATED (type)
6801 && deprecated_state != DEPRECATED_SUPPRESS)
6802 warn_deprecated_use (type);
6803 if (type && TREE_CODE (type) == TYPE_DECL)
6805 typedef_decl = type;
6806 type = TREE_TYPE (typedef_decl);
6808 /* No type at all: default to `int', and set DEFAULTED_INT
6809 because it was not a user-defined typedef. */
6810 if (type == NULL_TREE && (signed_p || unsigned_p || long_p || short_p))
6812 /* These imply 'int'. */
6813 type = integer_type_node;
6817 explicit_int = declspecs->explicit_int_p;
6818 explicit_char = declspecs->explicit_char_p;
6820 /* Check for repeated decl-specifiers. */
6821 for (ds = ds_first; ds != ds_last; ++ds)
6823 unsigned count = declspecs->specs[(int)ds];
6826 /* The "long" specifier is a special case because of
6831 error ("%<long long long%> is too long for GCC");
6832 else if (pedantic && !in_system_header && warn_long_long)
6833 pedwarn ("ISO C++ does not support %<long long%>");
6837 else if (declspecs->specs[(int)ds] > 1)
6839 static const char *const decl_spec_names[] = {
6855 error ("duplicate %qs", decl_spec_names[(int)ds]);
6860 /* See the code below that used this. */
6862 decl_attr = DECL_ATTRIBUTES (typedef_decl);
6864 typedef_type = type;
6867 if (sfk != sfk_conversion)
6868 ctor_return_type = ctype;
6870 if (sfk != sfk_none)
6871 type = check_special_function_return_type (sfk, type,
6873 else if (type == NULL_TREE)
6879 /* We handle `main' specially here, because 'main () { }' is so
6880 common. With no options, it is allowed. With -Wreturn-type,
6881 it is a warning. It is only an error with -pedantic-errors. */
6882 is_main = (funcdef_flag
6883 && dname && MAIN_NAME_P (dname)
6884 && ctype == NULL_TREE
6885 && in_namespace == NULL_TREE
6886 && current_namespace == global_namespace);
6888 if (type_was_error_mark_node)
6889 /* We've already issued an error, don't complain more. */;
6890 else if (in_system_header || flag_ms_extensions)
6891 /* Allow it, sigh. */;
6892 else if (pedantic || ! is_main)
6893 pedwarn ("ISO C++ forbids declaration of %qs with no type", name);
6894 else if (warn_return_type)
6895 warning ("ISO C++ forbids declaration of %qs with no type", name);
6897 type = integer_type_node;
6902 /* Now process the modifiers that were specified
6903 and check for invalid combinations. */
6905 /* Long double is a special combination. */
6906 if (long_p && TYPE_MAIN_VARIANT (type) == double_type_node)
6909 type = build_qualified_type (long_double_type_node,
6910 cp_type_quals (type));
6913 /* Check all other uses of type modifiers. */
6915 if (unsigned_p || signed_p || long_p || short_p)
6919 if (TREE_CODE (type) == REAL_TYPE)
6920 error ("short, signed or unsigned invalid for %qs", name);
6921 else if (TREE_CODE (type) != INTEGER_TYPE)
6922 error ("long, short, signed or unsigned invalid for %qs", name);
6923 else if (long_p && short_p)
6924 error ("long and short specified together for %qs", name);
6925 else if ((long_p || short_p) && explicit_char)
6926 error ("long or short specified with char for %qs", name);
6927 else if ((long_p|| short_p) && TREE_CODE (type) == REAL_TYPE)
6928 error ("long or short specified with floating type for %qs", name);
6929 else if (signed_p && unsigned_p)
6930 error ("signed and unsigned given together for %qs", name);
6934 if (!explicit_int && !defaulted_int && !explicit_char && pedantic)
6936 pedwarn ("long, short, signed or unsigned used invalidly for %qs",
6938 if (flag_pedantic_errors)
6943 /* Discard the type modifiers if they are invalid. */
6954 /* Decide whether an integer type is signed or not.
6955 Optionally treat bitfields as signed by default. */
6959 It is implementation-defined whether a plain (neither
6960 explicitly signed or unsigned) char, short, int, or long
6961 bit-field is signed or unsigned.
6963 Naturally, we extend this to long long as well. Note that
6964 this does not include wchar_t. */
6965 || (bitfield && !flag_signed_bitfields
6967 /* A typedef for plain `int' without `signed' can be
6968 controlled just like plain `int', but a typedef for
6969 `signed int' cannot be so controlled. */
6971 && C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl))
6972 && (TREE_CODE (type) == INTEGER_TYPE
6973 || TREE_CODE (type) == CHAR_TYPE)
6974 && !same_type_p (TYPE_MAIN_VARIANT (type), wchar_type_node)))
6977 type = long_long_unsigned_type_node;
6979 type = long_unsigned_type_node;
6981 type = short_unsigned_type_node;
6982 else if (type == char_type_node)
6983 type = unsigned_char_type_node;
6984 else if (typedef_decl)
6985 type = c_common_unsigned_type (type);
6987 type = unsigned_type_node;
6989 else if (signed_p && type == char_type_node)
6990 type = signed_char_type_node;
6992 type = long_long_integer_type_node;
6994 type = long_integer_type_node;
6996 type = short_integer_type_node;
6998 if (declspecs->specs[(int)ds_complex])
7000 if (TREE_CODE (type) != INTEGER_TYPE && TREE_CODE (type) != REAL_TYPE)
7001 error ("complex invalid for %qs", name);
7002 /* If we just have "complex", it is equivalent to
7003 "complex double", but if any modifiers at all are specified it is
7004 the complex form of TYPE. E.g, "complex short" is
7005 "complex short int". */
7007 else if (defaulted_int && ! longlong
7008 && ! (long_p || short_p || signed_p || unsigned_p))
7009 type = complex_double_type_node;
7010 else if (type == integer_type_node)
7011 type = complex_integer_type_node;
7012 else if (type == float_type_node)
7013 type = complex_float_type_node;
7014 else if (type == double_type_node)
7015 type = complex_double_type_node;
7016 else if (type == long_double_type_node)
7017 type = complex_long_double_type_node;
7019 type = build_complex_type (type);
7022 type_quals = TYPE_UNQUALIFIED;
7023 if (declspecs->specs[(int)ds_const])
7024 type_quals |= TYPE_QUAL_CONST;
7025 if (declspecs->specs[(int)ds_volatile])
7026 type_quals |= TYPE_QUAL_VOLATILE;
7027 if (declspecs->specs[(int)ds_restrict])
7028 type_quals |= TYPE_QUAL_RESTRICT;
7029 if (sfk == sfk_conversion && type_quals != TYPE_UNQUALIFIED)
7030 error ("qualifiers are not allowed on declaration of %<operator %T%>",
7033 type_quals |= cp_type_quals (type);
7034 type = cp_build_qualified_type_real
7035 (type, type_quals, ((typedef_decl && !DECL_ARTIFICIAL (typedef_decl)
7036 ? tf_ignore_bad_quals : 0) | tf_error | tf_warning));
7037 /* We might have ignored or rejected some of the qualifiers. */
7038 type_quals = cp_type_quals (type);
7041 inlinep = !! declspecs->specs[(int)ds_inline];
7042 virtualp = !! declspecs->specs[(int)ds_virtual];
7043 explicitp = !! declspecs->specs[(int)ds_explicit];
7045 storage_class = declspecs->storage_class;
7046 if (storage_class == sc_static)
7047 staticp = 1 + (decl_context == FIELD);
7049 if (virtualp && staticp == 2)
7051 error ("member %qD cannot be declared both virtual and static", dname);
7054 friendp = !! declspecs->specs[(int)ds_friend];
7056 if (dependant_name && !friendp)
7058 error ("%<%T::%D%> is not a valid declarator", ctype, dependant_name);
7059 return void_type_node;
7062 /* Issue errors about use of storage classes for parameters. */
7063 if (decl_context == PARM)
7065 if (declspecs->specs[(int)ds_typedef])
7066 error ("typedef declaration invalid in parameter declaration");
7067 else if (storage_class == sc_static
7068 || storage_class == sc_extern
7070 error ("storage class specifiers invalid in parameter declarations");
7073 /* Give error if `virtual' is used outside of class declaration. */
7075 && (current_class_name == NULL_TREE || decl_context != FIELD))
7077 error ("virtual outside class declaration");
7081 /* Static anonymous unions are dealt with here. */
7082 if (staticp && decl_context == TYPENAME
7084 && ANON_AGGR_TYPE_P (declspecs->type))
7085 decl_context = FIELD;
7087 /* Warn about storage classes that are invalid for certain
7088 kinds of declarations (parameters, typenames, etc.). */
7089 if (declspecs->multiple_storage_classes_p)
7090 error ("multiple storage classes in declaration of %qs", name);
7093 && storage_class != sc_extern
7094 && storage_class != sc_static)
7095 || declspecs->specs[(int)ds_typedef]))
7097 error ("multiple storage classes in declaration of %qs", name);
7100 else if (decl_context != NORMAL
7101 && ((storage_class != sc_none
7102 && storage_class != sc_mutable)
7105 if ((decl_context == PARM || decl_context == CATCHPARM)
7106 && (storage_class == sc_register
7107 || storage_class == sc_auto))
7109 else if (declspecs->specs[(int)ds_typedef])
7111 else if (decl_context == FIELD
7112 /* C++ allows static class elements. */
7113 && storage_class == sc_static)
7114 /* C++ also allows inlines and signed and unsigned elements,
7115 but in those cases we don't come in here. */
7119 if (decl_context == FIELD)
7121 tree tmp = NULL_TREE;
7126 /* Avoid trying to get an operand off an identifier node. */
7127 if (declarator->kind != cdk_id)
7128 tmp = declarator->declarator->u.id.unqualified_name;
7130 tmp = declarator->u.id.unqualified_name;
7131 op = IDENTIFIER_OPNAME_P (tmp);
7132 if (IDENTIFIER_TYPENAME_P (tmp))
7134 if (is_typename_at_global_scope (tmp))
7135 name = IDENTIFIER_POINTER (tmp);
7137 name = "<invalid operator>";
7140 error ("storage class specified for %s %qs",
7141 op ? "member operator" : "field",
7146 if (decl_context == PARM || decl_context == CATCHPARM)
7147 error ("storage class specified for parameter %qs", name);
7149 error ("storage class specified for typename");
7151 if (storage_class == sc_register
7152 || storage_class == sc_auto
7153 || storage_class == sc_extern
7155 storage_class = sc_none;
7158 else if (storage_class == sc_extern && initialized
7161 if (toplevel_bindings_p ())
7163 /* It's common practice (and completely valid) to have a const
7164 be initialized and declared extern. */
7165 if (!(type_quals & TYPE_QUAL_CONST))
7166 warning ("%qs initialized and declared %<extern%>", name);
7169 error ("%qs has both %<extern%> and initializer", name);
7171 else if (storage_class == sc_extern && funcdef_flag
7172 && ! toplevel_bindings_p ())
7173 error ("nested function %qs declared %<extern%>", name);
7174 else if (toplevel_bindings_p ())
7176 if (storage_class == sc_auto)
7177 error ("top-level declaration of %qs specifies %<auto%>", name);
7180 && storage_class != sc_extern
7181 && storage_class != sc_static)
7183 error ("function-scope %qs implicitly auto and declared %<__thread%>",
7188 if (storage_class && friendp)
7189 error ("storage class specifiers invalid in friend function declarations");
7192 unqualified_id = NULL_TREE;
7195 unqualified_id = id_declarator->u.id.unqualified_name;
7196 if (TREE_CODE (unqualified_id) == BASELINK)
7197 unqualified_id = BASELINK_FUNCTIONS (unqualified_id);
7198 switch (TREE_CODE (unqualified_id))
7202 = constructor_name (TREE_OPERAND (unqualified_id, 0));
7207 = constructor_name (TREE_TYPE (unqualified_id));
7210 case IDENTIFIER_NODE:
7211 case TEMPLATE_ID_EXPR:
7219 /* Determine the type of the entity declared by recurring on the
7222 declarator && declarator->kind != cdk_id;
7223 declarator = declarator->declarator)
7225 const cp_declarator *inner_declarator;
7228 if (type == error_mark_node)
7229 return error_mark_node;
7231 inner_declarator = declarator->declarator;
7233 attrs = declarator->attributes;
7239 if (declarator == NULL || declarator->kind == cdk_id)
7240 attr_flags |= (int) ATTR_FLAG_DECL_NEXT;
7241 if (declarator->kind == cdk_function)
7242 attr_flags |= (int) ATTR_FLAG_FUNCTION_NEXT;
7243 if (declarator->kind == cdk_array)
7244 attr_flags |= (int) ATTR_FLAG_ARRAY_NEXT;
7245 returned_attrs = decl_attributes (&type,
7246 chainon (returned_attrs, attrs),
7250 switch (declarator->kind)
7253 type = create_array_type_for_decl (dname, type,
7254 declarator->u.array.bounds);
7262 /* Declaring a function type.
7263 Make sure we have a valid type for the function to return. */
7265 /* We now know that the TYPE_QUALS don't apply to the
7266 decl, but to its return type. */
7267 type_quals = TYPE_UNQUALIFIED;
7269 /* Warn about some types functions can't return. */
7271 if (TREE_CODE (type) == FUNCTION_TYPE)
7273 error ("%qs declared as function returning a function", name);
7274 type = integer_type_node;
7276 if (TREE_CODE (type) == ARRAY_TYPE)
7278 error ("%qs declared as function returning an array", name);
7279 type = integer_type_node;
7282 /* Pick up type qualifiers which should be applied to `this'. */
7283 quals = declarator->u.function.qualifiers;
7285 /* Pick up the exception specifications. */
7286 raises = declarator->u.function.exception_specification;
7288 /* Say it's a definition only for the CALL_EXPR
7289 closest to the identifier. */
7290 funcdecl_p = inner_declarator && inner_declarator->kind == cdk_id;
7292 if (ctype == NULL_TREE
7293 && decl_context == FIELD
7295 && (friendp == 0 || dname == current_class_name))
7296 ctype = current_class_type;
7298 if (ctype && sfk == sfk_conversion)
7299 TYPE_HAS_CONVERSION (ctype) = 1;
7300 if (ctype && (sfk == sfk_constructor
7301 || sfk == sfk_destructor))
7303 /* We are within a class's scope. If our declarator name
7304 is the same as the class name, and we are defining
7305 a function, then it is a constructor/destructor, and
7306 therefore returns a void type. */
7308 if (flags == DTOR_FLAG)
7310 /* ISO C++ 12.4/2. A destructor may not be
7311 declared const or volatile. A destructor may
7314 error ("destructor cannot be static member function");
7317 error ("destructors may not be cv-qualified");
7318 quals = TYPE_UNQUALIFIED;
7320 if (decl_context == FIELD)
7322 if (! member_function_or_else (ctype,
7325 return void_type_node;
7328 else /* It's a constructor. */
7332 /* ISO C++ 12.1. A constructor may not be
7333 declared const or volatile. A constructor may
7334 not be virtual. A constructor may not be
7337 error ("constructor cannot be static member function");
7340 pedwarn ("constructors cannot be declared virtual");
7345 error ("constructors may not be cv-qualified");
7346 quals = TYPE_UNQUALIFIED;
7348 if (decl_context == FIELD)
7350 if (! member_function_or_else (ctype,
7353 return void_type_node;
7354 TYPE_HAS_CONSTRUCTOR (ctype) = 1;
7355 if (sfk != sfk_constructor)
7359 if (decl_context == FIELD)
7365 error ("can't initialize friend function %qs", name);
7368 /* Cannot be both friend and virtual. */
7369 error ("virtual functions cannot be friends");
7372 if (decl_context == NORMAL)
7373 error ("friend declaration not in class definition");
7374 if (current_function_decl && funcdef_flag)
7375 error ("can't define friend function %qs in a local "
7380 arg_types = grokparms (declarator->u.function.parameters,
7383 if (inner_declarator
7384 && inner_declarator->kind == cdk_id
7385 && inner_declarator->u.id.sfk == sfk_destructor
7386 && arg_types != void_list_node)
7388 error ("destructors may not have parameters");
7389 arg_types = void_list_node;
7393 type = build_function_type (type, arg_types);
7400 /* Filter out pointers-to-references and references-to-references.
7401 We can get these if a TYPE_DECL is used. */
7403 if (TREE_CODE (type) == REFERENCE_TYPE)
7405 error (declarator->kind == cdk_reference
7406 ? "cannot declare reference to %q#T"
7407 : "cannot declare pointer to %q#T", type);
7408 type = TREE_TYPE (type);
7410 else if (VOID_TYPE_P (type))
7412 if (declarator->kind == cdk_reference)
7413 error ("cannot declare reference to %q#T", type);
7414 else if (declarator->kind == cdk_ptrmem)
7415 error ("cannot declare pointer to %q#T member", type);
7418 /* We now know that the TYPE_QUALS don't apply to the decl,
7419 but to the target of the pointer. */
7420 type_quals = TYPE_UNQUALIFIED;
7422 if (declarator->kind == cdk_ptrmem
7423 && (TREE_CODE (type) == FUNCTION_TYPE
7424 || (quals && TREE_CODE (type) == METHOD_TYPE)))
7426 tree dummy = build_decl (TYPE_DECL, NULL_TREE, type);
7427 grok_method_quals (declarator->u.pointer.class_type,
7429 type = TREE_TYPE (dummy);
7430 quals = TYPE_UNQUALIFIED;
7433 if (declarator->kind == cdk_reference)
7435 if (!VOID_TYPE_P (type))
7436 type = build_reference_type (type);
7438 else if (TREE_CODE (type) == METHOD_TYPE)
7439 type = build_ptrmemfunc_type (build_pointer_type (type));
7440 else if (declarator->kind == cdk_ptrmem)
7442 /* We might have parsed a namespace as the class type. */
7443 if (TREE_CODE (declarator->u.pointer.class_type)
7446 error ("%qD is a namespace",
7447 declarator->u.pointer.class_type);
7448 type = build_pointer_type (type);
7451 type = build_ptrmem_type (declarator->u.pointer.class_type,
7455 type = build_pointer_type (type);
7457 /* Process a list of type modifier keywords (such as
7458 const or volatile) that were given inside the `*' or `&'. */
7460 if (declarator->u.pointer.qualifiers)
7463 = cp_build_qualified_type (type,
7464 declarator->u.pointer.qualifiers);
7465 type_quals = cp_type_quals (type);
7478 if (unqualified_id && TREE_CODE (unqualified_id) == TEMPLATE_ID_EXPR
7479 && TREE_CODE (type) != FUNCTION_TYPE
7480 && TREE_CODE (type) != METHOD_TYPE)
7482 error ("template-id %qD used as a declarator",
7484 unqualified_id = dname;
7487 /* If DECLARATOR is non-NULL, we know it is a cdk_id declarator;
7488 otherwise, we would not have exited the loop above. */
7490 && declarator->u.id.qualifying_scope
7491 && TYPE_P (declarator->u.id.qualifying_scope))
7495 ctype = declarator->u.id.qualifying_scope;
7496 ctype = TYPE_MAIN_VARIANT (ctype);
7498 while (t != NULL_TREE && CLASS_TYPE_P (t))
7500 /* You're supposed to have one `template <...>' for every
7501 template class, but you don't need one for a full
7502 specialization. For example:
7504 template <class T> struct S{};
7505 template <> struct S<int> { void f(); };
7506 void S<int>::f () {}
7508 is correct; there shouldn't be a `template <>' for the
7509 definition of `S<int>::f'. */
7510 if (CLASSTYPE_TEMPLATE_INFO (t)
7511 && (CLASSTYPE_TEMPLATE_INSTANTIATION (t)
7512 || uses_template_parms (CLASSTYPE_TI_ARGS (t)))
7513 && PRIMARY_TEMPLATE_P (CLASSTYPE_TI_TEMPLATE (t)))
7514 template_count += 1;
7516 t = TYPE_MAIN_DECL (t);
7517 t = DECL_CONTEXT (t);
7520 if (ctype == current_class_type)
7526 Is this ill-formed? */
7529 pedwarn ("extra qualification %<%T::%> on member %qs ignored",
7532 else if (TREE_CODE (type) == FUNCTION_TYPE)
7534 tree sname = declarator->u.id.unqualified_name;
7536 if (TREE_CODE (sname) == IDENTIFIER_NODE
7537 && NEW_DELETE_OPNAME_P (sname))
7538 /* Overloaded operator new and operator delete
7539 are always static functions. */
7541 else if (current_class_type == NULL_TREE || friendp)
7543 = build_method_type_directly (ctype,
7545 TYPE_ARG_TYPES (type));
7548 error ("cannot declare member function %<%T::%s%> within %<%T%>",
7549 ctype, name, current_class_type);
7550 return error_mark_node;
7553 else if (declspecs->specs[(int)ds_typedef]
7554 || COMPLETE_TYPE_P (complete_type (ctype)))
7556 /* Have to move this code elsewhere in this function.
7557 this code is used for i.e., typedef int A::M; M *pm;
7559 It is? How? jason 10/2/94 */
7561 if (current_class_type)
7563 error ("cannot declare member %<%T::%s%> within %qT",
7564 ctype, name, current_class_type);
7565 return void_type_node;
7570 cxx_incomplete_type_error (NULL_TREE, ctype);
7571 return error_mark_node;
7578 *attrlist = chainon (returned_attrs, *attrlist);
7580 attrlist = &returned_attrs;
7583 /* Now TYPE has the actual type. */
7585 /* Did array size calculations overflow? */
7587 if (TREE_CODE (type) == ARRAY_TYPE
7588 && COMPLETE_TYPE_P (type)
7589 && TREE_OVERFLOW (TYPE_SIZE (type)))
7591 error ("size of array %qs is too large", name);
7592 /* If we proceed with the array type as it is, we'll eventually
7593 crash in tree_low_cst(). */
7594 type = error_mark_node;
7597 if ((decl_context == FIELD || decl_context == PARM)
7598 && !processing_template_decl
7599 && variably_modified_type_p (type, NULL_TREE))
7601 if (decl_context == FIELD)
7602 error ("data member may not have variably modified type %qT", type);
7604 error ("parameter may not have variably modified type %qT", type);
7605 type = error_mark_node;
7608 if (explicitp == 1 || (explicitp && friendp))
7610 /* [dcl.fct.spec] The explicit specifier shall only be used in
7611 declarations of constructors within a class definition. */
7612 error ("only declarations of constructors can be %<explicit%>");
7616 if (storage_class == sc_mutable)
7618 if (decl_context != FIELD || friendp)
7620 error ("non-member %qs cannot be declared %<mutable%>", name);
7621 storage_class = sc_none;
7623 else if (decl_context == TYPENAME || declspecs->specs[(int)ds_typedef])
7625 error ("non-object member %qs cannot be declared %<mutable%>", name);
7626 storage_class = sc_none;
7628 else if (TREE_CODE (type) == FUNCTION_TYPE
7629 || TREE_CODE (type) == METHOD_TYPE)
7631 error ("function %qs cannot be declared %<mutable%>", name);
7632 storage_class = sc_none;
7636 error ("static %qs cannot be declared %<mutable%>", name);
7637 storage_class = sc_none;
7639 else if (type_quals & TYPE_QUAL_CONST)
7641 error ("const %qs cannot be declared %<mutable%>", name);
7642 storage_class = sc_none;
7646 /* If this is declaring a typedef name, return a TYPE_DECL. */
7647 if (declspecs->specs[(int)ds_typedef] && decl_context != TYPENAME)
7651 /* Note that the grammar rejects storage classes
7652 in typenames, fields or parameters. */
7653 if (current_lang_name == lang_name_java)
7654 TYPE_FOR_JAVA (type) = 1;
7656 if (decl_context == FIELD)
7658 if (constructor_name_p (unqualified_id, current_class_type))
7659 pedwarn ("ISO C++ forbids nested type %qD with same name "
7660 "as enclosing class",
7662 decl = build_lang_decl (TYPE_DECL, unqualified_id, type);
7666 decl = build_decl (TYPE_DECL, unqualified_id, type);
7667 if (in_namespace || ctype)
7668 error ("%Jtypedef name may not be a nested-name-specifier", decl);
7669 if (!current_function_decl)
7670 DECL_CONTEXT (decl) = FROB_CONTEXT (current_namespace);
7671 else if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (current_function_decl)
7672 || (DECL_MAYBE_IN_CHARGE_DESTRUCTOR_P
7673 (current_function_decl)))
7674 /* The TYPE_DECL is "abstract" because there will be
7675 clones of this constructor/destructor, and there will
7676 be copies of this TYPE_DECL generated in those
7678 DECL_ABSTRACT (decl) = 1;
7681 /* If the user declares "typedef struct {...} foo" then the
7682 struct will have an anonymous name. Fill that name in now.
7683 Nothing can refer to it, so nothing needs know about the name
7685 if (type != error_mark_node
7688 && TREE_CODE (TYPE_NAME (type)) == TYPE_DECL
7689 && TYPE_ANONYMOUS_P (type)
7690 /* Don't do this if there are attributes. */
7691 && (!attrlist || !*attrlist)
7692 && cp_type_quals (type) == TYPE_UNQUALIFIED)
7694 tree oldname = TYPE_NAME (type);
7697 /* Replace the anonymous name with the real name everywhere. */
7698 for (t = TYPE_MAIN_VARIANT (type); t; t = TYPE_NEXT_VARIANT (t))
7699 if (TYPE_NAME (t) == oldname)
7700 TYPE_NAME (t) = decl;
7702 if (TYPE_LANG_SPECIFIC (type))
7703 TYPE_WAS_ANONYMOUS (type) = 1;
7705 /* If this is a typedef within a template class, the nested
7706 type is a (non-primary) template. The name for the
7707 template needs updating as well. */
7708 if (TYPE_LANG_SPECIFIC (type) && CLASSTYPE_TEMPLATE_INFO (type))
7709 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type))
7710 = TYPE_IDENTIFIER (type);
7712 /* FIXME remangle member functions; member functions of a
7713 type with external linkage have external linkage. */
7718 if (ctype == NULL_TREE)
7720 if (TREE_CODE (type) != METHOD_TYPE)
7721 error ("%Jinvalid type qualifier for non-member function type",
7724 ctype = TYPE_METHOD_BASETYPE (type);
7726 if (ctype != NULL_TREE)
7727 grok_method_quals (ctype, decl, quals);
7731 || (typedef_decl && C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl)))
7732 C_TYPEDEF_EXPLICITLY_SIGNED (decl) = 1;
7734 bad_specifiers (decl, "type", virtualp, quals != TYPE_UNQUALIFIED,
7735 inlinep, friendp, raises != NULL_TREE);
7740 /* Detect the case of an array type of unspecified size
7741 which came, as such, direct from a typedef name.
7742 We must copy the type, so that the array's domain can be
7743 individually set by the object's initializer. */
7745 if (type && typedef_type
7746 && TREE_CODE (type) == ARRAY_TYPE && !TYPE_DOMAIN (type)
7747 && TYPE_MAIN_VARIANT (type) == TYPE_MAIN_VARIANT (typedef_type))
7748 type = build_cplus_array_type (TREE_TYPE (type), NULL_TREE);
7750 /* Detect where we're using a typedef of function type to declare a
7751 function. PARMS will not be set, so we must create it now. */
7753 if (type == typedef_type && TREE_CODE (type) == FUNCTION_TYPE)
7755 tree decls = NULL_TREE;
7758 for (args = TYPE_ARG_TYPES (type); args; args = TREE_CHAIN (args))
7760 tree decl = cp_build_parm_decl (NULL_TREE, TREE_VALUE (args));
7762 TREE_CHAIN (decl) = decls;
7766 parms = nreverse (decls);
7769 /* If this is a type name (such as, in a cast or sizeof),
7770 compute the type and return it now. */
7772 if (decl_context == TYPENAME)
7774 /* Note that the grammar rejects storage classes
7775 in typenames, fields or parameters. */
7776 if (type_quals != TYPE_UNQUALIFIED)
7777 type_quals = TYPE_UNQUALIFIED;
7779 /* Special case: "friend class foo" looks like a TYPENAME context. */
7782 if (type_quals != TYPE_UNQUALIFIED)
7784 error ("type qualifiers specified for friend class declaration");
7785 type_quals = TYPE_UNQUALIFIED;
7789 error ("%<inline%> specified for friend class declaration");
7795 /* Don't allow friend declaration without a class-key. */
7796 if (TREE_CODE (type) == TEMPLATE_TYPE_PARM)
7797 pedwarn ("template parameters cannot be friends");
7798 else if (TREE_CODE (type) == TYPENAME_TYPE)
7799 pedwarn ("friend declaration requires class-key, "
7800 "i.e. %<friend class %T::%D%>",
7801 TYPE_CONTEXT (type), TYPENAME_TYPE_FULLNAME (type));
7803 pedwarn ("friend declaration requires class-key, "
7804 "i.e. %<friend %#T%>",
7808 /* Only try to do this stuff if we didn't already give up. */
7809 if (type != integer_type_node)
7811 /* A friendly class? */
7812 if (current_class_type)
7813 make_friend_class (current_class_type, TYPE_MAIN_VARIANT (type),
7816 error ("trying to make class %qT a friend of global scope",
7819 type = void_type_node;
7824 if (ctype == NULL_TREE)
7826 if (TREE_CODE (type) != METHOD_TYPE)
7827 error ("invalid qualifiers on non-member function type");
7829 ctype = TYPE_METHOD_BASETYPE (type);
7833 tree dummy = build_decl (TYPE_DECL, unqualified_id, type);
7834 grok_method_quals (ctype, dummy, quals);
7835 type = TREE_TYPE (dummy);
7841 else if (unqualified_id == NULL_TREE && decl_context != PARM
7842 && decl_context != CATCHPARM
7843 && TREE_CODE (type) != UNION_TYPE
7846 error ("abstract declarator %qT used as declaration", type);
7847 return error_mark_node;
7850 /* Only functions may be declared using an operator-function-id. */
7852 && IDENTIFIER_OPNAME_P (unqualified_id)
7853 && TREE_CODE (type) != FUNCTION_TYPE
7854 && TREE_CODE (type) != METHOD_TYPE)
7856 error ("declaration of %qD as non-function", unqualified_id);
7857 return error_mark_node;
7860 /* We don't check parameter types here because we can emit a better
7861 error message later. */
7862 if (decl_context != PARM)
7863 type = check_var_type (unqualified_id, type);
7865 /* Now create the decl, which may be a VAR_DECL, a PARM_DECL
7866 or a FUNCTION_DECL, depending on DECL_CONTEXT and TYPE. */
7868 if (decl_context == PARM || decl_context == CATCHPARM)
7870 if (ctype || in_namespace)
7871 error ("cannot use %<::%> in parameter declaration");
7873 /* A parameter declared as an array of T is really a pointer to T.
7874 One declared as a function is really a pointer to a function.
7875 One declared as a member is really a pointer to member. */
7877 if (TREE_CODE (type) == ARRAY_TYPE)
7879 /* Transfer const-ness of array into that of type pointed to. */
7880 type = build_pointer_type (TREE_TYPE (type));
7881 type_quals = TYPE_UNQUALIFIED;
7883 else if (TREE_CODE (type) == FUNCTION_TYPE)
7884 type = build_pointer_type (type);
7890 if (decl_context == PARM)
7892 decl = cp_build_parm_decl (unqualified_id, type);
7894 bad_specifiers (decl, "parameter", virtualp, quals != TYPE_UNQUALIFIED,
7895 inlinep, friendp, raises != NULL_TREE);
7897 else if (decl_context == FIELD)
7899 /* The C99 flexible array extension. */
7900 if (!staticp && TREE_CODE (type) == ARRAY_TYPE
7901 && TYPE_DOMAIN (type) == NULL_TREE)
7903 tree itype = compute_array_index_type (dname, integer_zero_node);
7904 type = build_cplus_array_type (TREE_TYPE (type), itype);
7907 if (type == error_mark_node)
7909 /* Happens when declaring arrays of sizes which
7910 are error_mark_node, for example. */
7913 else if (in_namespace && !friendp)
7915 /* Something like struct S { int N::j; }; */
7916 error ("invalid use of %<::%>");
7919 else if (TREE_CODE (type) == FUNCTION_TYPE)
7922 tree function_context;
7924 /* We catch the others as conflicts with the builtin
7926 if (friendp && unqualified_id == ridpointers[(int) RID_SIGNED])
7928 error ("function %qD cannot be declared friend",
7935 if (ctype == NULL_TREE)
7936 ctype = current_class_type;
7938 if (ctype == NULL_TREE)
7940 error ("can't make %qD into a method -- not in a class",
7942 return void_type_node;
7945 /* ``A union may [ ... ] not [ have ] virtual functions.''
7947 if (virtualp && TREE_CODE (ctype) == UNION_TYPE)
7949 error ("function %qD declared virtual inside a union",
7951 return void_type_node;
7954 if (NEW_DELETE_OPNAME_P (unqualified_id))
7958 error ("%qD cannot be declared virtual, since it "
7964 else if (staticp < 2)
7965 type = build_method_type_directly (ctype,
7967 TYPE_ARG_TYPES (type));
7970 /* Tell grokfndecl if it needs to set TREE_PUBLIC on the node. */
7971 function_context = (ctype != NULL_TREE) ?
7972 decl_function_context (TYPE_MAIN_DECL (ctype)) : NULL_TREE;
7973 publicp = (! friendp || ! staticp)
7974 && function_context == NULL_TREE;
7975 decl = grokfndecl (ctype, type,
7976 TREE_CODE (unqualified_id) != TEMPLATE_ID_EXPR
7977 ? unqualified_id : dname,
7980 virtualp, flags, quals, raises,
7981 friendp ? -1 : 0, friendp, publicp, inlinep,
7982 funcdef_flag, template_count, in_namespace, attrlist);
7983 if (decl == NULL_TREE)
7986 /* This clobbers the attrs stored in `decl' from `attrlist'. */
7987 /* The decl and setting of decl_attr is also turned off. */
7988 decl = build_decl_attribute_variant (decl, decl_attr);
7991 /* [class.conv.ctor]
7993 A constructor declared without the function-specifier
7994 explicit that can be called with a single parameter
7995 specifies a conversion from the type of its first
7996 parameter to the type of its class. Such a constructor
7997 is called a converting constructor. */
7999 DECL_NONCONVERTING_P (decl) = 1;
8000 else if (DECL_CONSTRUCTOR_P (decl))
8002 /* The constructor can be called with exactly one
8003 parameter if there is at least one parameter, and
8004 any subsequent parameters have default arguments.
8005 Ignore any compiler-added parms. */
8006 tree arg_types = FUNCTION_FIRST_USER_PARMTYPE (decl);
8008 if (arg_types == void_list_node
8010 && TREE_CHAIN (arg_types)
8011 && TREE_CHAIN (arg_types) != void_list_node
8012 && !TREE_PURPOSE (TREE_CHAIN (arg_types))))
8013 DECL_NONCONVERTING_P (decl) = 1;
8016 else if (TREE_CODE (type) == METHOD_TYPE)
8018 /* We only get here for friend declarations of
8019 members of other classes. */
8020 /* All method decls are public, so tell grokfndecl to set
8021 TREE_PUBLIC, also. */
8022 decl = grokfndecl (ctype, type,
8023 TREE_CODE (unqualified_id) != TEMPLATE_ID_EXPR
8024 ? unqualified_id : dname,
8027 virtualp, flags, quals, raises,
8028 friendp ? -1 : 0, friendp, 1, 0, funcdef_flag,
8029 template_count, in_namespace, attrlist);
8030 if (decl == NULL_TREE)
8033 else if (!staticp && !dependent_type_p (type)
8034 && !COMPLETE_TYPE_P (complete_type (type))
8035 && (TREE_CODE (type) != ARRAY_TYPE || initialized == 0))
8038 error ("field %qD has incomplete type", unqualified_id);
8040 error ("name %qT has incomplete type", type);
8042 /* If we're instantiating a template, tell them which
8043 instantiation made the field's type be incomplete. */
8044 if (current_class_type
8045 && TYPE_NAME (current_class_type)
8046 && IDENTIFIER_TEMPLATE (TYPE_IDENTIFIER (current_class_type))
8048 && declspecs->type == type)
8049 error (" in instantiation of template %qT",
8050 current_class_type);
8052 type = error_mark_node;
8059 error ("%qE is neither function nor member function; "
8060 "cannot be declared friend", unqualified_id);
8068 /* Friends are treated specially. */
8069 if (ctype == current_class_type)
8070 warning ("member functions are implicitly friends of their class");
8071 else if (decl && DECL_NAME (decl))
8073 if (template_class_depth (current_class_type) == 0)
8075 decl = check_explicit_specialization
8076 (unqualified_id, decl, template_count,
8077 2 * (funcdef_flag != 0) + 4);
8078 if (decl == error_mark_node)
8079 return error_mark_node;
8082 decl = do_friend (ctype, unqualified_id, decl,
8083 *attrlist, flags, quals, funcdef_flag);
8087 return void_type_node;
8090 /* Structure field. It may not be a function, except for C++. */
8092 if (decl == NULL_TREE)
8098 /* An attempt is being made to initialize a non-static
8099 member. But, from [class.mem]:
8101 4 A member-declarator can contain a
8102 constant-initializer only if it declares a static
8103 member (_class.static_) of integral or enumeration
8104 type, see _class.static.data_.
8106 This used to be relatively common practice, but
8107 the rest of the compiler does not correctly
8108 handle the initialization unless the member is
8109 static so we make it static below. */
8110 pedwarn ("ISO C++ forbids initialization of member %qD",
8112 pedwarn ("making %qD static", unqualified_id);
8116 if (uses_template_parms (type))
8117 /* We'll check at instantiation time. */
8119 else if (check_static_variable_definition (unqualified_id,
8121 /* If we just return the declaration, crashes
8122 will sometimes occur. We therefore return
8123 void_type_node, as if this was a friend
8124 declaration, to cause callers to completely
8125 ignore this declaration. */
8126 return void_type_node;
8131 /* C++ allows static class members. All other work
8132 for this is done by grokfield. */
8133 decl = build_lang_decl (VAR_DECL, unqualified_id, type);
8134 set_linkage_for_static_data_member (decl);
8135 /* Even if there is an in-class initialization, DECL
8136 is considered undefined until an out-of-class
8137 definition is provided. */
8138 DECL_EXTERNAL (decl) = 1;
8142 decl = build_decl (FIELD_DECL, unqualified_id, type);
8143 DECL_NONADDRESSABLE_P (decl) = bitfield;
8144 if (storage_class == sc_mutable)
8146 DECL_MUTABLE_P (decl) = 1;
8147 storage_class = sc_none;
8151 bad_specifiers (decl, "field", virtualp, quals != TYPE_UNQUALIFIED,
8152 inlinep, friendp, raises != NULL_TREE);
8155 else if (TREE_CODE (type) == FUNCTION_TYPE
8156 || TREE_CODE (type) == METHOD_TYPE)
8161 if (!unqualified_id)
8164 if (TREE_CODE (unqualified_id) == TEMPLATE_ID_EXPR)
8165 original_name = dname;
8167 original_name = unqualified_id;
8169 if (storage_class == sc_auto)
8170 error ("storage class %<auto%> invalid for function %qs", name);
8171 else if (storage_class == sc_register)
8172 error ("storage class %<register%> invalid for function %qs", name);
8174 error ("storage class %<__thread%> invalid for function %qs", name);
8176 /* Function declaration not at top level.
8177 Storage classes other than `extern' are not allowed
8178 and `extern' makes no difference. */
8179 if (! toplevel_bindings_p ()
8180 && (storage_class == sc_static
8181 || declspecs->specs[(int)ds_inline])
8184 if (storage_class == sc_static)
8185 pedwarn ("%<static%> specified invalid for function %qs "
8186 "declared out of global scope", name);
8188 pedwarn ("%<inline%> specifier invalid for function %qs "
8189 "declared out of global scope", name);
8192 if (ctype == NULL_TREE)
8196 error ("virtual non-class function %qs", name);
8200 else if (TREE_CODE (type) == FUNCTION_TYPE && staticp < 2
8201 && !NEW_DELETE_OPNAME_P (original_name))
8202 type = build_method_type_directly (ctype,
8204 TYPE_ARG_TYPES (type));
8206 /* Record presence of `static'. */
8207 publicp = (ctype != NULL_TREE
8208 || storage_class == sc_extern
8209 || storage_class != sc_static);
8211 decl = grokfndecl (ctype, type, original_name, parms, unqualified_id,
8212 virtualp, flags, quals, raises,
8214 publicp, inlinep, funcdef_flag,
8215 template_count, in_namespace, attrlist);
8216 if (decl == NULL_TREE)
8221 int invalid_static = 0;
8223 /* Don't allow a static member function in a class, and forbid
8224 declaring main to be static. */
8225 if (TREE_CODE (type) == METHOD_TYPE)
8227 pedwarn ("cannot declare member function %qD to have "
8228 "static linkage", decl);
8231 else if (current_function_decl)
8233 /* FIXME need arm citation */
8234 error ("cannot declare static function inside another function");
8241 storage_class = sc_none;
8247 /* It's a variable. */
8249 /* An uninitialized decl with `extern' is a reference. */
8250 decl = grokvardecl (type, unqualified_id,
8253 (type_quals & TYPE_QUAL_CONST) != 0,
8254 ctype ? ctype : in_namespace);
8255 bad_specifiers (decl, "variable", virtualp, quals != TYPE_UNQUALIFIED,
8256 inlinep, friendp, raises != NULL_TREE);
8260 DECL_CONTEXT (decl) = ctype;
8263 pedwarn ("%<static%> may not be used when defining "
8264 "(as opposed to declaring) a static data member");
8266 storage_class = sc_none;
8268 if (storage_class == sc_register && TREE_STATIC (decl))
8270 error ("static member %qD declared %<register%>", decl);
8271 storage_class = sc_none;
8273 if (storage_class == sc_extern && pedantic)
8275 pedwarn ("cannot explicitly declare member %q#D to have "
8278 storage_class = sc_none;
8283 /* Record `register' declaration for warnings on &
8284 and in case doing stupid register allocation. */
8286 if (storage_class == sc_register)
8287 DECL_REGISTER (decl) = 1;
8288 else if (storage_class == sc_extern)
8289 DECL_THIS_EXTERN (decl) = 1;
8290 else if (storage_class == sc_static)
8291 DECL_THIS_STATIC (decl) = 1;
8293 /* Record constancy and volatility. There's no need to do this
8294 when processing a template; we'll do this for the instantiated
8295 declaration based on the type of DECL. */
8296 if (!processing_template_decl)
8297 c_apply_type_quals_to_decl (type_quals, decl);
8303 /* Subroutine of start_function. Ensure that each of the parameter
8304 types (as listed in PARMS) is complete, as is required for a
8305 function definition. */
8308 require_complete_types_for_parms (tree parms)
8310 for (; parms; parms = TREE_CHAIN (parms))
8312 if (dependent_type_p (TREE_TYPE (parms)))
8314 if (VOID_TYPE_P (TREE_TYPE (parms)))
8315 /* grokparms will have already issued an error. */
8316 TREE_TYPE (parms) = error_mark_node;
8317 else if (complete_type_or_else (TREE_TYPE (parms), parms))
8319 layout_decl (parms, 0);
8320 DECL_ARG_TYPE (parms) = type_passed_as (TREE_TYPE (parms));
8325 /* Returns nonzero if T is a local variable. */
8328 local_variable_p (tree t)
8330 if ((TREE_CODE (t) == VAR_DECL
8331 /* A VAR_DECL with a context that is a _TYPE is a static data
8333 && !TYPE_P (CP_DECL_CONTEXT (t))
8334 /* Any other non-local variable must be at namespace scope. */
8335 && !DECL_NAMESPACE_SCOPE_P (t))
8336 || (TREE_CODE (t) == PARM_DECL))
8342 /* Returns nonzero if T is an automatic local variable or a label.
8343 (These are the declarations that need to be remapped when the code
8344 containing them is duplicated.) */
8347 nonstatic_local_decl_p (tree t)
8349 return ((local_variable_p (t) && !TREE_STATIC (t))
8350 || TREE_CODE (t) == LABEL_DECL
8351 || TREE_CODE (t) == RESULT_DECL);
8354 /* Like local_variable_p, but suitable for use as a tree-walking
8358 local_variable_p_walkfn (tree *tp, int *walk_subtrees,
8359 void *data ATTRIBUTE_UNUSED)
8361 if (local_variable_p (*tp) && !DECL_ARTIFICIAL (*tp))
8363 else if (TYPE_P (*tp))
8370 /* Check that ARG, which is a default-argument expression for a
8371 parameter DECL, is valid. Returns ARG, or ERROR_MARK_NODE, if
8372 something goes wrong. DECL may also be a _TYPE node, rather than a
8373 DECL, if there is no DECL available. */
8376 check_default_argument (tree decl, tree arg)
8381 if (TREE_CODE (arg) == DEFAULT_ARG)
8382 /* We get a DEFAULT_ARG when looking at an in-class declaration
8383 with a default argument. Ignore the argument for now; we'll
8384 deal with it after the class is complete. */
8387 if (processing_template_decl || uses_template_parms (arg))
8388 /* We don't do anything checking until instantiation-time. Note
8389 that there may be uninstantiated arguments even for an
8390 instantiated function, since default arguments are not
8391 instantiated until they are needed. */
8400 decl_type = TREE_TYPE (decl);
8402 if (arg == error_mark_node
8403 || decl == error_mark_node
8404 || TREE_TYPE (arg) == error_mark_node
8405 || decl_type == error_mark_node)
8406 /* Something already went wrong. There's no need to check
8408 return error_mark_node;
8410 /* [dcl.fct.default]
8412 A default argument expression is implicitly converted to the
8414 if (!TREE_TYPE (arg)
8415 || !can_convert_arg (decl_type, TREE_TYPE (arg), arg))
8418 error ("default argument for %q#D has type %qT",
8419 decl, TREE_TYPE (arg));
8421 error ("default argument for parameter of type %qT has type %qT",
8422 decl_type, TREE_TYPE (arg));
8424 return error_mark_node;
8427 /* [dcl.fct.default]
8429 Local variables shall not be used in default argument
8432 The keyword `this' shall not be used in a default argument of a
8434 var = walk_tree_without_duplicates (&arg, local_variable_p_walkfn,
8438 error ("default argument %qE uses local variable %qD", arg, var);
8439 return error_mark_node;
8446 /* Decode the list of parameter types for a function type.
8447 Given the list of things declared inside the parens,
8448 return a list of types.
8450 If this parameter does not end with an ellipsis, we append
8453 *PARMS is set to the chain of PARM_DECLs created. */
8456 grokparms (cp_parameter_declarator *first_parm, tree *parms)
8458 tree result = NULL_TREE;
8459 tree decls = NULL_TREE;
8460 int ellipsis = !first_parm || first_parm->ellipsis_p;
8461 cp_parameter_declarator *parm;
8464 for (parm = first_parm; parm != NULL; parm = parm->next)
8466 tree type = NULL_TREE;
8467 tree init = parm->default_argument;
8471 if (parm == no_parameters)
8474 attrs = parm->decl_specifiers.attributes;
8475 parm->decl_specifiers.attributes = NULL_TREE;
8476 decl = grokdeclarator (parm->declarator, &parm->decl_specifiers,
8477 PARM, init != NULL_TREE, &attrs);
8478 if (! decl || TREE_TYPE (decl) == error_mark_node)
8482 cplus_decl_attributes (&decl, attrs, 0);
8484 type = TREE_TYPE (decl);
8485 if (VOID_TYPE_P (type))
8487 if (same_type_p (type, void_type_node)
8488 && !DECL_NAME (decl) && !result && !parm->next && !ellipsis)
8489 /* this is a parmlist of `(void)', which is ok. */
8491 cxx_incomplete_type_error (decl, type);
8492 /* It's not a good idea to actually create parameters of
8493 type `void'; other parts of the compiler assume that a
8494 void type terminates the parameter list. */
8495 type = error_mark_node;
8496 TREE_TYPE (decl) = error_mark_node;
8499 if (type != error_mark_node)
8501 /* Top-level qualifiers on the parameters are
8502 ignored for function types. */
8503 type = cp_build_qualified_type (type, 0);
8504 if (TREE_CODE (type) == METHOD_TYPE)
8506 error ("parameter %qD invalidly declared method type", decl);
8507 type = build_pointer_type (type);
8508 TREE_TYPE (decl) = type;
8510 else if (abstract_virtuals_error (decl, type))
8511 any_error = 1; /* Seems like a good idea. */
8512 else if (POINTER_TYPE_P (type))
8514 /* [dcl.fct]/6, parameter types cannot contain pointers
8515 (references) to arrays of unknown bound. */
8516 tree t = TREE_TYPE (type);
8517 int ptr = TYPE_PTR_P (type);
8523 else if (TREE_CODE (t) != ARRAY_TYPE)
8525 else if (!TYPE_DOMAIN (t))
8529 if (TREE_CODE (t) == ARRAY_TYPE)
8530 error ("parameter %qD includes %s to array of unknown "
8532 decl, ptr ? "pointer" : "reference", t);
8535 if (!any_error && init)
8536 init = check_default_argument (decl, init);
8541 TREE_CHAIN (decl) = decls;
8543 result = tree_cons (init, type, result);
8545 decls = nreverse (decls);
8546 result = nreverse (result);
8548 result = chainon (result, void_list_node);
8555 /* D is a constructor or overloaded `operator='.
8557 Let T be the class in which D is declared. Then, this function
8560 -1 if D's is an ill-formed constructor or copy assignment operator
8561 whose first parameter is of type `T'.
8562 0 if D is not a copy constructor or copy assignment
8564 1 if D is a copy constructor or copy assignment operator whose
8565 first parameter is a reference to const qualified T.
8566 2 if D is a copy constructor or copy assignment operator whose
8567 first parameter is a reference to non-const qualified T.
8569 This function can be used as a predicate. Positive values indicate
8570 a copy constructor and nonzero values indicate a copy assignment
8580 gcc_assert (DECL_FUNCTION_MEMBER_P (d));
8582 if (DECL_TEMPLATE_INFO (d)
8583 && DECL_MEMBER_TEMPLATE_P (DECL_TI_TEMPLATE (d)))
8584 /* Instantiations of template member functions are never copy
8585 functions. Note that member functions of templated classes are
8586 represented as template functions internally, and we must
8587 accept those as copy functions. */
8590 args = FUNCTION_FIRST_USER_PARMTYPE (d);
8594 arg_type = TREE_VALUE (args);
8596 if (TYPE_MAIN_VARIANT (arg_type) == DECL_CONTEXT (d))
8598 /* Pass by value copy assignment operator. */
8601 else if (TREE_CODE (arg_type) == REFERENCE_TYPE
8602 && TYPE_MAIN_VARIANT (TREE_TYPE (arg_type)) == DECL_CONTEXT (d))
8604 if (CP_TYPE_CONST_P (TREE_TYPE (arg_type)))
8610 args = TREE_CHAIN (args);
8612 if (args && args != void_list_node && !TREE_PURPOSE (args))
8613 /* There are more non-optional args. */
8619 /* Remember any special properties of member function DECL. */
8621 void grok_special_member_properties (tree decl)
8623 if (!DECL_NONSTATIC_MEMBER_FUNCTION_P(decl))
8624 ; /* Not special. */
8625 else if (DECL_CONSTRUCTOR_P (decl))
8627 int ctor = copy_fn_p (decl);
8633 A non-template constructor for class X is a copy
8634 constructor if its first parameter is of type X&, const
8635 X&, volatile X& or const volatile X&, and either there
8636 are no other parameters or else all other parameters have
8637 default arguments. */
8638 TYPE_HAS_INIT_REF (DECL_CONTEXT (decl)) = 1;
8640 TYPE_HAS_CONST_INIT_REF (DECL_CONTEXT (decl)) = 1;
8642 else if (sufficient_parms_p (FUNCTION_FIRST_USER_PARMTYPE (decl)))
8643 TYPE_HAS_DEFAULT_CONSTRUCTOR (DECL_CONTEXT (decl)) = 1;
8645 else if (DECL_OVERLOADED_OPERATOR_P (decl) == NOP_EXPR)
8649 A non-template assignment operator for class X is a copy
8650 assignment operator if its parameter is of type X, X&, const
8651 X&, volatile X& or const volatile X&. */
8653 int assop = copy_fn_p (decl);
8657 TYPE_HAS_ASSIGN_REF (DECL_CONTEXT (decl)) = 1;
8659 TYPE_HAS_CONST_ASSIGN_REF (DECL_CONTEXT (decl)) = 1;
8664 /* Check a constructor DECL has the correct form. Complains
8665 if the class has a constructor of the form X(X). */
8668 grok_ctor_properties (tree ctype, tree decl)
8670 int ctor_parm = copy_fn_p (decl);
8676 A declaration of a constructor for a class X is ill-formed if
8677 its first parameter is of type (optionally cv-qualified) X
8678 and either there are no other parameters or else all other
8679 parameters have default arguments.
8681 We *don't* complain about member template instantiations that
8682 have this form, though; they can occur as we try to decide
8683 what constructor to use during overload resolution. Since
8684 overload resolution will never prefer such a constructor to
8685 the non-template copy constructor (which is either explicitly
8686 or implicitly defined), there's no need to worry about their
8687 existence. Theoretically, they should never even be
8688 instantiated, but that's hard to forestall. */
8689 error ("invalid constructor; you probably meant %<%T (const %T&)%>",
8697 /* An operator with this code is unary, but can also be binary. */
8700 ambi_op_p (enum tree_code code)
8702 return (code == INDIRECT_REF
8703 || code == ADDR_EXPR
8704 || code == CONVERT_EXPR
8705 || code == NEGATE_EXPR
8706 || code == PREINCREMENT_EXPR
8707 || code == PREDECREMENT_EXPR);
8710 /* An operator with this name can only be unary. */
8713 unary_op_p (enum tree_code code)
8715 return (code == TRUTH_NOT_EXPR
8716 || code == BIT_NOT_EXPR
8717 || code == COMPONENT_REF
8718 || code == TYPE_EXPR);
8721 /* DECL is a declaration for an overloaded operator. Returns true if
8722 the declaration is valid; false otherwise. If COMPLAIN is true,
8723 errors are issued for invalid declarations. */
8726 grok_op_properties (tree decl, int friendp, bool complain)
8728 tree argtypes = TYPE_ARG_TYPES (TREE_TYPE (decl));
8730 int methodp = (TREE_CODE (TREE_TYPE (decl)) == METHOD_TYPE);
8731 tree name = DECL_NAME (decl);
8732 enum tree_code operator_code;
8736 /* Assume that the declaration is valid. */
8739 /* Count the number of arguments. */
8740 for (argtype = argtypes, arity = 0;
8741 argtype && argtype != void_list_node;
8742 argtype = TREE_CHAIN (argtype))
8745 if (current_class_type == NULL_TREE)
8748 if (DECL_CONV_FN_P (decl))
8749 operator_code = TYPE_EXPR;
8753 #define DEF_OPERATOR(NAME, CODE, MANGLING, ARITY, ASSN_P) \
8754 if (ansi_opname (CODE) == name) \
8756 operator_code = (CODE); \
8759 else if (ansi_assopname (CODE) == name) \
8761 operator_code = (CODE); \
8762 DECL_ASSIGNMENT_OPERATOR_P (decl) = 1; \
8766 #include "operators.def"
8772 gcc_assert (operator_code != LAST_CPLUS_TREE_CODE);
8773 SET_OVERLOADED_OPERATOR_CODE (decl, operator_code);
8777 switch (operator_code)
8780 TYPE_HAS_NEW_OPERATOR (current_class_type) = 1;
8784 TYPE_GETS_DELETE (current_class_type) |= 1;
8788 TYPE_HAS_ARRAY_NEW_OPERATOR (current_class_type) = 1;
8791 case VEC_DELETE_EXPR:
8792 TYPE_GETS_DELETE (current_class_type) |= 2;
8800 /* [basic.std.dynamic.allocation]/1:
8802 A program is ill-formed if an allocation function is declared
8803 in a namespace scope other than global scope or declared static
8806 The same also holds true for deallocation functions. */
8807 if (operator_code == NEW_EXPR || operator_code == VEC_NEW_EXPR
8808 || operator_code == DELETE_EXPR || operator_code == VEC_DELETE_EXPR)
8810 if (DECL_NAMESPACE_SCOPE_P (decl))
8812 if (CP_DECL_CONTEXT (decl) != global_namespace)
8813 error ("%qD may not be declared within a namespace", decl);
8814 else if (!TREE_PUBLIC (decl))
8815 error ("%qD may not be declared as static", decl);
8819 if (operator_code == NEW_EXPR || operator_code == VEC_NEW_EXPR)
8820 TREE_TYPE (decl) = coerce_new_type (TREE_TYPE (decl));
8821 else if (operator_code == DELETE_EXPR || operator_code == VEC_DELETE_EXPR)
8822 TREE_TYPE (decl) = coerce_delete_type (TREE_TYPE (decl));
8825 /* An operator function must either be a non-static member function
8826 or have at least one parameter of a class, a reference to a class,
8827 an enumeration, or a reference to an enumeration. 13.4.0.6 */
8828 if (! methodp || DECL_STATIC_FUNCTION_P (decl))
8830 if (operator_code == TYPE_EXPR
8831 || operator_code == CALL_EXPR
8832 || operator_code == COMPONENT_REF
8833 || operator_code == ARRAY_REF
8834 || operator_code == NOP_EXPR)
8835 error ("%qD must be a nonstatic member function", decl);
8840 if (DECL_STATIC_FUNCTION_P (decl))
8841 error ("%qD must be either a non-static member "
8842 "function or a non-member function", decl);
8844 for (p = argtypes; p && p != void_list_node; p = TREE_CHAIN (p))
8846 tree arg = non_reference (TREE_VALUE (p));
8847 /* IS_AGGR_TYPE, rather than CLASS_TYPE_P, is used
8848 because these checks are performed even on
8849 template functions. */
8850 if (IS_AGGR_TYPE (arg) || TREE_CODE (arg) == ENUMERAL_TYPE)
8854 if (!p || p == void_list_node)
8859 error ("%qD must have an argument of class or "
8867 /* There are no restrictions on the arguments to an overloaded
8869 if (operator_code == CALL_EXPR)
8872 if (IDENTIFIER_TYPENAME_P (name) && ! DECL_TEMPLATE_INFO (decl))
8874 tree t = TREE_TYPE (name);
8877 int ref = (TREE_CODE (t) == REFERENCE_TYPE);
8878 const char *what = 0;
8881 t = TYPE_MAIN_VARIANT (TREE_TYPE (t));
8883 if (TREE_CODE (t) == VOID_TYPE)
8885 else if (t == current_class_type)
8886 what = "the same type";
8887 /* Don't force t to be complete here. */
8888 else if (IS_AGGR_TYPE (t)
8889 && COMPLETE_TYPE_P (t)
8890 && DERIVED_FROM_P (t, current_class_type))
8891 what = "a base class";
8893 if (what && warn_conversion)
8894 warning ("conversion to %s%s will never use a type "
8895 "conversion operator",
8896 ref ? "a reference to " : "", what);
8899 if (operator_code == COND_EXPR)
8902 error ("ISO C++ prohibits overloading operator ?:");
8904 else if (ambi_op_p (operator_code))
8907 /* We pick the one-argument operator codes by default, so
8908 we don't have to change anything. */
8910 else if (arity == 2)
8912 /* If we thought this was a unary operator, we now know
8913 it to be a binary operator. */
8914 switch (operator_code)
8917 operator_code = MULT_EXPR;
8921 operator_code = BIT_AND_EXPR;
8925 operator_code = PLUS_EXPR;
8929 operator_code = MINUS_EXPR;
8932 case PREINCREMENT_EXPR:
8933 operator_code = POSTINCREMENT_EXPR;
8936 case PREDECREMENT_EXPR:
8937 operator_code = POSTDECREMENT_EXPR;
8944 SET_OVERLOADED_OPERATOR_CODE (decl, operator_code);
8946 if ((operator_code == POSTINCREMENT_EXPR
8947 || operator_code == POSTDECREMENT_EXPR)
8948 && ! processing_template_decl
8949 && ! same_type_p (TREE_VALUE (TREE_CHAIN (argtypes)), integer_type_node))
8952 error ("postfix %qD must take %<int%> as its argument",
8956 ("postfix %qD must take %<int%> as its second argument",
8963 error ("%qD must take either zero or one argument", decl);
8965 error ("%qD must take either one or two arguments", decl);
8968 /* More Effective C++ rule 6. */
8970 && (operator_code == POSTINCREMENT_EXPR
8971 || operator_code == POSTDECREMENT_EXPR
8972 || operator_code == PREINCREMENT_EXPR
8973 || operator_code == PREDECREMENT_EXPR))
8975 tree arg = TREE_VALUE (argtypes);
8976 tree ret = TREE_TYPE (TREE_TYPE (decl));
8977 if (methodp || TREE_CODE (arg) == REFERENCE_TYPE)
8978 arg = TREE_TYPE (arg);
8979 arg = TYPE_MAIN_VARIANT (arg);
8980 if (operator_code == PREINCREMENT_EXPR
8981 || operator_code == PREDECREMENT_EXPR)
8983 if (TREE_CODE (ret) != REFERENCE_TYPE
8984 || !same_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (ret)),
8986 warning ("prefix %qD should return %qT", decl,
8987 build_reference_type (arg));
8991 if (!same_type_p (TYPE_MAIN_VARIANT (ret), arg))
8992 warning ("postfix %qD should return %qT", decl, arg);
8996 else if (unary_op_p (operator_code))
9001 error ("%qD must take %<void%>", decl);
9003 error ("%qD must take exactly one argument", decl);
9006 else /* if (binary_op_p (operator_code)) */
9011 error ("%qD must take exactly one argument", decl);
9013 error ("%qD must take exactly two arguments", decl);
9016 /* More Effective C++ rule 7. */
9018 && (operator_code == TRUTH_ANDIF_EXPR
9019 || operator_code == TRUTH_ORIF_EXPR
9020 || operator_code == COMPOUND_EXPR))
9021 warning ("user-defined %qD always evaluates both arguments",
9025 /* Effective C++ rule 23. */
9028 && !DECL_ASSIGNMENT_OPERATOR_P (decl)
9029 && (operator_code == PLUS_EXPR
9030 || operator_code == MINUS_EXPR
9031 || operator_code == TRUNC_DIV_EXPR
9032 || operator_code == MULT_EXPR
9033 || operator_code == TRUNC_MOD_EXPR)
9034 && TREE_CODE (TREE_TYPE (TREE_TYPE (decl))) == REFERENCE_TYPE)
9035 warning ("%qD should return by value", decl);
9038 for (; argtypes && argtypes != void_list_node;
9039 argtypes = TREE_CHAIN (argtypes))
9040 if (TREE_PURPOSE (argtypes))
9042 TREE_PURPOSE (argtypes) = NULL_TREE;
9043 if (operator_code == POSTINCREMENT_EXPR
9044 || operator_code == POSTDECREMENT_EXPR)
9047 pedwarn ("%qD cannot have default arguments", decl);
9050 error ("%qD cannot have default arguments", decl);
9058 /* Return a string giving the keyword associate with CODE. */
9061 tag_name (enum tag_types code)
9080 /* Name lookup in an elaborated-type-specifier (after the keyword
9081 indicated by TAG_CODE) has found the TYPE_DECL DECL. If the
9082 elaborated-type-specifier is invalid, issue a diagnostic and return
9083 error_mark_node; otherwise, return the *_TYPE to which it referred.
9084 If ALLOW_TEMPLATE_P is true, TYPE may be a class template. */
9087 check_elaborated_type_specifier (enum tag_types tag_code,
9089 bool allow_template_p)
9095 struct S { struct S *p; };
9097 name lookup will find the TYPE_DECL for the implicit "S::S"
9098 typedef. Adjust for that here. */
9099 if (DECL_SELF_REFERENCE_P (decl))
9100 decl = TYPE_NAME (TREE_TYPE (decl));
9102 type = TREE_TYPE (decl);
9104 /* Check TEMPLATE_TYPE_PARM first because DECL_IMPLICIT_TYPEDEF_P
9105 is false for this case as well. */
9106 if (TREE_CODE (type) == TEMPLATE_TYPE_PARM)
9108 error ("using template type parameter %qT after %qs",
9109 type, tag_name (tag_code));
9110 return error_mark_node;
9114 If the identifier resolves to a typedef-name or a template
9115 type-parameter, the elaborated-type-specifier is ill-formed.
9117 In other words, the only legitimate declaration to use in the
9118 elaborated type specifier is the implicit typedef created when
9119 the type is declared. */
9120 else if (!DECL_IMPLICIT_TYPEDEF_P (decl)
9121 && tag_code != typename_type)
9123 error ("using typedef-name %qD after %qs", decl, tag_name (tag_code));
9124 cp_error_at ("%qD has a previous declaration here", decl);
9125 return error_mark_node;
9127 else if (TREE_CODE (type) != RECORD_TYPE
9128 && TREE_CODE (type) != UNION_TYPE
9129 && tag_code != enum_type
9130 && tag_code != typename_type)
9132 error ("%qT referred to as %qs", type, tag_name (tag_code));
9133 cp_error_at ("%qT has a previous declaration here", type);
9134 return error_mark_node;
9136 else if (TREE_CODE (type) != ENUMERAL_TYPE
9137 && tag_code == enum_type
9138 && tag_code != typename_type)
9140 error ("%qT referred to as enum", type);
9141 cp_error_at ("%qT has a previous declaration here", type);
9142 return error_mark_node;
9144 else if (!allow_template_p
9145 && TREE_CODE (type) == RECORD_TYPE
9146 && CLASSTYPE_IS_TEMPLATE (type))
9148 /* If a class template appears as elaborated type specifier
9149 without a template header such as:
9151 template <class T> class C {};
9152 void f(class C); // No template header here
9154 then the required template argument is missing. */
9156 error ("template argument required for %<%s %T%>",
9157 tag_name (tag_code),
9158 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type)));
9159 return error_mark_node;
9165 /* Lookup NAME in elaborate type specifier in scope according to
9166 SCOPE and issue diagnostics if necessary.
9167 Return *_TYPE node upon success, NULL_TREE when the NAME is not
9168 found, and ERROR_MARK_NODE for type error. */
9171 lookup_and_check_tag (enum tag_types tag_code, tree name,
9172 tag_scope scope, bool template_header_p)
9176 if (scope == ts_global)
9177 decl = lookup_name (name, 2);
9179 decl = lookup_type_scope (name, scope);
9181 if (decl && DECL_CLASS_TEMPLATE_P (decl))
9182 decl = DECL_TEMPLATE_RESULT (decl);
9184 if (decl && TREE_CODE (decl) == TYPE_DECL)
9186 /* Look for invalid nested type:
9190 if (scope == ts_current && DECL_SELF_REFERENCE_P (decl))
9192 error ("%qD has the same name as the class in which it is "
9195 return error_mark_node;
9198 /* Two cases we need to consider when deciding if a class
9199 template is allowed as an elaborated type specifier:
9200 1. It is a self reference to its own class.
9201 2. It comes with a template header.
9205 template <class T> class C {
9206 class C *c1; // DECL_SELF_REFERENCE_P is true
9209 template <class U> class C; // template_header_p is true
9210 template <class T> class C<T>::D {
9211 class C *c2; // DECL_SELF_REFERENCE_P is true
9214 t = check_elaborated_type_specifier (tag_code,
9217 | DECL_SELF_REFERENCE_P (decl));
9224 /* Get the struct, enum or union (TAG_CODE says which) with tag NAME.
9225 Define the tag as a forward-reference if it is not defined.
9227 If a declaration is given, process it here, and report an error if
9228 multiple declarations are not identical.
9230 SCOPE is TS_CURRENT when this is also a definition. Only look in
9231 the current frame for the name (since C++ allows new names in any
9232 scope.) It is TS_WITHIN_ENCLOSING_NON_CLASS if this is a friend
9233 declaration. Only look beginning from the current scope outward up
9234 till the nearest non-class scope. Otherwise it is TS_GLOBAL.
9236 TEMPLATE_HEADER_P is true when this declaration is preceded by
9237 a set of template parameters. */
9240 xref_tag (enum tag_types tag_code, tree name,
9241 tag_scope scope, bool template_header_p)
9243 enum tree_code code;
9245 tree context = NULL_TREE;
9247 timevar_push (TV_NAME_LOOKUP);
9249 gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE);
9261 code = ENUMERAL_TYPE;
9267 /* In case of anonymous name, xref_tag is only called to
9268 make type node and push name. Name lookup is not required. */
9269 if (ANON_AGGRNAME_P (name))
9272 t = lookup_and_check_tag (tag_code, name,
9273 scope, template_header_p);
9275 if (t == error_mark_node)
9276 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
9278 if (scope != ts_current && t && current_class_type
9279 && template_class_depth (current_class_type)
9280 && template_header_p)
9282 /* Since SCOPE is not TS_CURRENT, we are not looking at a
9283 definition of this tag. Since, in addition, we are currently
9284 processing a (member) template declaration of a template
9285 class, we must be very careful; consider:
9292 { template <class V>
9293 friend struct S1; };
9295 Here, the S2::S1 declaration should not be confused with the
9296 outer declaration. In particular, the inner version should
9297 have a template parameter of level 2, not level 1. This
9298 would be particularly important if the member declaration
9301 template <class V = U> friend struct S1;
9303 say, when we should tsubst into `U' when instantiating
9304 S2. On the other hand, when presented with:
9314 we must find the inner binding eventually. We
9315 accomplish this by making sure that the new type we
9316 create to represent this declaration has the right
9318 context = TYPE_CONTEXT (t);
9324 /* If no such tag is yet defined, create a forward-reference node
9325 and record it as the "definition".
9326 When a real declaration of this type is found,
9327 the forward-reference will be altered into a real type. */
9328 if (code == ENUMERAL_TYPE)
9330 error ("use of enum %q#D without previous declaration", name);
9331 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
9335 t = make_aggr_type (code);
9336 TYPE_CONTEXT (t) = context;
9337 /* pushtag only cares whether SCOPE is zero or not. */
9338 t = pushtag (name, t, scope != ts_current);
9343 if (template_header_p && IS_AGGR_TYPE (t))
9344 redeclare_class_template (t, current_template_parms);
9345 else if (!processing_template_decl
9347 && CLASSTYPE_IS_TEMPLATE (t))
9349 error ("redeclaration of %qT as a non-template", t);
9350 t = error_mark_node;
9354 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, t);
9358 xref_tag_from_type (tree old, tree id, tag_scope scope)
9360 enum tag_types tag_kind;
9362 if (TREE_CODE (old) == RECORD_TYPE)
9363 tag_kind = (CLASSTYPE_DECLARED_CLASS (old) ? class_type : record_type);
9365 tag_kind = union_type;
9367 if (id == NULL_TREE)
9368 id = TYPE_IDENTIFIER (old);
9370 return xref_tag (tag_kind, id, scope, false);
9373 /* Create the binfo hierarchy for REF with (possibly NULL) base list
9374 BASE_LIST. For each element on BASE_LIST the TREE_PURPOSE is an
9375 access_* node, and the TREE_VALUE is the type of the base-class.
9376 Non-NULL TREE_TYPE indicates virtual inheritance. */
9379 xref_basetypes (tree ref, tree base_list)
9382 tree binfo, base_binfo;
9383 unsigned max_vbases = 0; /* Maximum direct & indirect virtual bases. */
9384 unsigned max_bases = 0; /* Maximum direct bases. */
9386 tree default_access;
9387 tree igo_prev; /* Track Inheritance Graph Order. */
9389 if (ref == error_mark_node)
9392 /* The base of a derived class is private by default, all others are
9394 default_access = (TREE_CODE (ref) == RECORD_TYPE
9395 && CLASSTYPE_DECLARED_CLASS (ref)
9396 ? access_private_node : access_public_node);
9398 /* First, make sure that any templates in base-classes are
9399 instantiated. This ensures that if we call ourselves recursively
9400 we do not get confused about which classes are marked and which
9405 tree basetype = TREE_VALUE (*basep);
9407 if (!(processing_template_decl && uses_template_parms (basetype))
9408 && !complete_type_or_else (basetype, NULL))
9409 /* An incomplete type. Remove it from the list. */
9410 *basep = TREE_CHAIN (*basep);
9414 if (TREE_TYPE (*basep))
9416 if (CLASS_TYPE_P (basetype))
9417 max_vbases += VEC_length (tree, CLASSTYPE_VBASECLASSES (basetype));
9418 basep = &TREE_CHAIN (*basep);
9422 TYPE_MARKED_P (ref) = 1;
9424 /* The binfo slot should be empty, unless this is an (ill-formed)
9426 gcc_assert (!TYPE_BINFO (ref) || TYPE_SIZE (ref));
9427 gcc_assert (TYPE_MAIN_VARIANT (ref) == ref);
9429 binfo = make_tree_binfo (max_bases);
9431 TYPE_BINFO (ref) = binfo;
9432 BINFO_OFFSET (binfo) = size_zero_node;
9433 BINFO_TYPE (binfo) = ref;
9437 BINFO_BASE_ACCESSES (binfo) = VEC_alloc (tree, max_bases);
9438 /* An aggregate cannot have baseclasses. */
9439 CLASSTYPE_NON_AGGREGATE (ref) = 1;
9441 if (TREE_CODE (ref) == UNION_TYPE)
9442 error ("derived union %qT invalid", ref);
9447 if (TYPE_FOR_JAVA (ref))
9448 error ("Java class %qT cannot have multiple bases", ref);
9453 CLASSTYPE_VBASECLASSES (ref) = VEC_alloc (tree, max_vbases);
9455 if (TYPE_FOR_JAVA (ref))
9456 error ("Java class %qT cannot have virtual bases", ref);
9459 for (igo_prev = binfo; base_list; base_list = TREE_CHAIN (base_list))
9461 tree access = TREE_PURPOSE (base_list);
9462 int via_virtual = TREE_TYPE (base_list) != NULL_TREE;
9463 tree basetype = TREE_VALUE (base_list);
9465 if (access == access_default_node)
9466 access = default_access;
9468 if (TREE_CODE (basetype) == TYPE_DECL)
9469 basetype = TREE_TYPE (basetype);
9470 if (TREE_CODE (basetype) != RECORD_TYPE
9471 && TREE_CODE (basetype) != TYPENAME_TYPE
9472 && TREE_CODE (basetype) != TEMPLATE_TYPE_PARM
9473 && TREE_CODE (basetype) != BOUND_TEMPLATE_TEMPLATE_PARM)
9475 error ("base type %qT fails to be a struct or class type",
9480 if (TYPE_FOR_JAVA (basetype) && (current_lang_depth () == 0))
9481 TYPE_FOR_JAVA (ref) = 1;
9483 base_binfo = NULL_TREE;
9484 if (CLASS_TYPE_P (basetype) && !dependent_type_p (basetype))
9486 base_binfo = TYPE_BINFO (basetype);
9487 /* The original basetype could have been a typedef'd type. */
9488 basetype = BINFO_TYPE (base_binfo);
9490 /* Inherit flags from the base. */
9491 TYPE_HAS_NEW_OPERATOR (ref)
9492 |= TYPE_HAS_NEW_OPERATOR (basetype);
9493 TYPE_HAS_ARRAY_NEW_OPERATOR (ref)
9494 |= TYPE_HAS_ARRAY_NEW_OPERATOR (basetype);
9495 TYPE_GETS_DELETE (ref) |= TYPE_GETS_DELETE (basetype);
9496 TYPE_HAS_CONVERSION (ref) |= TYPE_HAS_CONVERSION (basetype);
9497 CLASSTYPE_DIAMOND_SHAPED_P (ref)
9498 |= CLASSTYPE_DIAMOND_SHAPED_P (basetype);
9499 CLASSTYPE_REPEATED_BASE_P (ref)
9500 |= CLASSTYPE_REPEATED_BASE_P (basetype);
9503 /* We must do this test after we've seen through a typedef
9505 if (TYPE_MARKED_P (basetype))
9507 if (basetype == ref)
9508 error ("recursive type %qT undefined", basetype);
9510 error ("duplicate base type %qT invalid", basetype);
9513 TYPE_MARKED_P (basetype) = 1;
9515 base_binfo = copy_binfo (base_binfo, basetype, ref,
9516 &igo_prev, via_virtual);
9517 if (!BINFO_INHERITANCE_CHAIN (base_binfo))
9518 BINFO_INHERITANCE_CHAIN (base_binfo) = binfo;
9520 BINFO_BASE_APPEND (binfo, base_binfo);
9521 BINFO_BASE_ACCESS_APPEND (binfo, access);
9524 if (VEC_space (tree, CLASSTYPE_VBASECLASSES (ref), 1))
9525 /* If we have space in the vbase vector, we must have shared at
9526 least one of them, and are therefore diamond shaped. */
9527 CLASSTYPE_DIAMOND_SHAPED_P (ref) = 1;
9529 /* Unmark all the types. */
9530 for (i = 0; BINFO_BASE_ITERATE (binfo, i, base_binfo); i++)
9531 TYPE_MARKED_P (BINFO_TYPE (base_binfo)) = 0;
9532 TYPE_MARKED_P (ref) = 0;
9534 /* Now see if we have a repeated base type. */
9535 if (!CLASSTYPE_REPEATED_BASE_P (ref))
9537 for (base_binfo = binfo; base_binfo;
9538 base_binfo = TREE_CHAIN (base_binfo))
9540 if (TYPE_MARKED_P (BINFO_TYPE (base_binfo)))
9542 CLASSTYPE_REPEATED_BASE_P (ref) = 1;
9545 TYPE_MARKED_P (BINFO_TYPE (base_binfo)) = 1;
9547 for (base_binfo = binfo; base_binfo;
9548 base_binfo = TREE_CHAIN (base_binfo))
9549 if (TYPE_MARKED_P (BINFO_TYPE (base_binfo)))
9550 TYPE_MARKED_P (BINFO_TYPE (base_binfo)) = 0;
9557 /* Begin compiling the definition of an enumeration type.
9559 Returns the type object, as yet incomplete.
9560 Also records info about it so that build_enumerator
9561 may be used to declare the individual values as they are read. */
9564 start_enum (tree name)
9568 gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE);
9570 /* If this is the real definition for a previous forward reference,
9571 fill in the contents in the same object that used to be the
9572 forward reference. */
9574 enumtype = lookup_and_check_tag (enum_type, name,
9575 /*tag_scope=*/ts_current,
9576 /*template_header_p=*/false);
9578 if (enumtype != NULL_TREE && TREE_CODE (enumtype) == ENUMERAL_TYPE)
9580 error ("multiple definition of %q#T", enumtype);
9581 error ("%Jprevious definition here", TYPE_MAIN_DECL (enumtype));
9582 /* Clear out TYPE_VALUES, and start again. */
9583 TYPE_VALUES (enumtype) = NULL_TREE;
9587 /* In case of error, make a dummy enum to allow parsing to
9589 if (enumtype == error_mark_node)
9590 name = make_anon_name ();
9592 enumtype = make_node (ENUMERAL_TYPE);
9593 enumtype = pushtag (name, enumtype, 0);
9599 /* After processing and defining all the values of an enumeration type,
9600 install their decls in the enumeration type and finish it off.
9601 ENUMTYPE is the type object and VALUES a list of name-value pairs. */
9604 finish_enum (tree enumtype)
9613 bool use_short_enum;
9617 integer_type_kind itk;
9618 tree underlying_type = NULL_TREE;
9620 /* We built up the VALUES in reverse order. */
9621 TYPE_VALUES (enumtype) = nreverse (TYPE_VALUES (enumtype));
9623 /* For an enum defined in a template, just set the type of the values;
9624 all further processing is postponed until the template is
9625 instantiated. We need to set the type so that tsubst of a CONST_DECL
9627 if (processing_template_decl)
9629 for (values = TYPE_VALUES (enumtype);
9631 values = TREE_CHAIN (values))
9632 TREE_TYPE (TREE_VALUE (values)) = enumtype;
9633 if (at_function_scope_p ())
9634 add_stmt (build_min (TAG_DEFN, enumtype));
9638 /* Determine the minimum and maximum values of the enumerators. */
9639 if (TYPE_VALUES (enumtype))
9641 minnode = maxnode = NULL_TREE;
9643 for (values = TYPE_VALUES (enumtype);
9645 values = TREE_CHAIN (values))
9647 decl = TREE_VALUE (values);
9649 /* [dcl.enum]: Following the closing brace of an enum-specifier,
9650 each enumerator has the type of its enumeration. Prior to the
9651 closing brace, the type of each enumerator is the type of its
9652 initializing value. */
9653 TREE_TYPE (decl) = enumtype;
9655 /* Update the minimum and maximum values, if appropriate. */
9656 value = DECL_INITIAL (decl);
9657 /* Figure out what the minimum and maximum values of the
9660 minnode = maxnode = value;
9661 else if (tree_int_cst_lt (maxnode, value))
9663 else if (tree_int_cst_lt (value, minnode))
9670 If the enumerator-list is empty, the underlying type is as if
9671 the enumeration had a single enumerator with value 0. */
9672 minnode = maxnode = integer_zero_node;
9674 /* Compute the number of bits require to represent all values of the
9675 enumeration. We must do this before the type of MINNODE and
9676 MAXNODE are transformed, since min_precision relies on the
9677 TREE_TYPE of the value it is passed. */
9678 unsignedp = tree_int_cst_sgn (minnode) >= 0;
9679 lowprec = min_precision (minnode, unsignedp);
9680 highprec = min_precision (maxnode, unsignedp);
9681 precision = MAX (lowprec, highprec);
9683 /* Determine the underlying type of the enumeration.
9687 The underlying type of an enumeration is an integral type that
9688 can represent all the enumerator values defined in the
9689 enumeration. It is implementation-defined which integral type is
9690 used as the underlying type for an enumeration except that the
9691 underlying type shall not be larger than int unless the value of
9692 an enumerator cannot fit in an int or unsigned int.
9694 We use "int" or an "unsigned int" as the underlying type, even if
9695 a smaller integral type would work, unless the user has
9696 explicitly requested that we use the smallest possible type. The
9697 user can request that for all enumerations with a command line
9698 flag, or for just one enumeration with an attribute. */
9700 use_short_enum = flag_short_enums
9701 || lookup_attribute ("packed", TYPE_ATTRIBUTES (enumtype));
9703 for (itk = (use_short_enum ? itk_char : itk_int);
9707 underlying_type = integer_types[itk];
9708 if (TYPE_PRECISION (underlying_type) >= precision
9709 && TYPE_UNSIGNED (underlying_type) == unsignedp)
9712 if (itk == itk_none)
9716 IF no integral type can represent all the enumerator values, the
9717 enumeration is ill-formed. */
9718 error ("no integral type can represent all of the enumerator values "
9719 "for %qT", enumtype);
9720 precision = TYPE_PRECISION (long_long_integer_type_node);
9721 underlying_type = integer_types[itk_unsigned_long_long];
9724 /* Compute the minium and maximum values for the type.
9728 For an enumeration where emin is the smallest enumerator and emax
9729 is the largest, the values of the enumeration are the values of the
9730 underlying type in the range bmin to bmax, where bmin and bmax are,
9731 respectively, the smallest and largest values of the smallest bit-
9732 field that can store emin and emax. */
9734 /* The middle-end currently assumes that types with TYPE_PRECISION
9735 narrower than their underlying type are suitably zero or sign
9736 extended to fill their mode. g++ doesn't make these guarantees.
9737 Until the middle-end can represent such paradoxical types, we
9738 set the TYPE_PRECISION to the width of the underlying type. */
9739 TYPE_PRECISION (enumtype) = TYPE_PRECISION (underlying_type);
9741 set_min_and_max_values_for_integral_type (enumtype, precision, unsignedp);
9745 The value of sizeof() applied to an enumeration type, an object
9746 of an enumeration type, or an enumerator, is the value of sizeof()
9747 applied to the underlying type. */
9748 TYPE_SIZE (enumtype) = TYPE_SIZE (underlying_type);
9749 TYPE_SIZE_UNIT (enumtype) = TYPE_SIZE_UNIT (underlying_type);
9750 TYPE_MODE (enumtype) = TYPE_MODE (underlying_type);
9751 TYPE_ALIGN (enumtype) = TYPE_ALIGN (underlying_type);
9752 TYPE_USER_ALIGN (enumtype) = TYPE_USER_ALIGN (underlying_type);
9753 TYPE_UNSIGNED (enumtype) = TYPE_UNSIGNED (underlying_type);
9755 /* Convert each of the enumerators to the type of the underlying
9756 type of the enumeration. */
9757 for (values = TYPE_VALUES (enumtype); values; values = TREE_CHAIN (values))
9759 decl = TREE_VALUE (values);
9760 value = perform_implicit_conversion (underlying_type,
9761 DECL_INITIAL (decl));
9763 /* Do not clobber shared ints. */
9764 value = copy_node (value);
9766 TREE_TYPE (value) = enumtype;
9767 DECL_INITIAL (decl) = value;
9768 TREE_VALUE (values) = value;
9771 /* Fix up all variant types of this enum type. */
9772 for (t = TYPE_MAIN_VARIANT (enumtype); t; t = TYPE_NEXT_VARIANT (t))
9774 TYPE_VALUES (t) = TYPE_VALUES (enumtype);
9775 TYPE_MIN_VALUE (t) = TYPE_MIN_VALUE (enumtype);
9776 TYPE_MAX_VALUE (t) = TYPE_MAX_VALUE (enumtype);
9777 TYPE_SIZE (t) = TYPE_SIZE (enumtype);
9778 TYPE_SIZE_UNIT (t) = TYPE_SIZE_UNIT (enumtype);
9779 TYPE_MODE (t) = TYPE_MODE (enumtype);
9780 TYPE_PRECISION (t) = TYPE_PRECISION (enumtype);
9781 TYPE_ALIGN (t) = TYPE_ALIGN (enumtype);
9782 TYPE_USER_ALIGN (t) = TYPE_USER_ALIGN (enumtype);
9783 TYPE_UNSIGNED (t) = TYPE_UNSIGNED (enumtype);
9786 /* Finish debugging output for this type. */
9787 rest_of_type_compilation (enumtype, namespace_bindings_p ());
9790 /* Build and install a CONST_DECL for an enumeration constant of the
9791 enumeration type ENUMTYPE whose NAME and VALUE (if any) are provided.
9792 Assignment of sequential values by default is handled here. */
9795 build_enumerator (tree name, tree value, tree enumtype)
9801 /* Remove no-op casts from the value. */
9803 STRIP_TYPE_NOPS (value);
9805 if (! processing_template_decl)
9807 /* Validate and default VALUE. */
9808 if (value != NULL_TREE)
9810 value = integral_constant_value (value);
9812 if (TREE_CODE (value) == INTEGER_CST)
9814 value = perform_integral_promotions (value);
9815 constant_expression_warning (value);
9819 error ("enumerator value for %qD not integer constant", name);
9824 /* Default based on previous value. */
9825 if (value == NULL_TREE)
9827 if (TYPE_VALUES (enumtype))
9830 unsigned HOST_WIDE_INT lo;
9834 /* The next value is the previous value plus one. We can
9835 safely assume that the previous value is an INTEGER_CST.
9836 add_double doesn't know the type of the target expression,
9837 so we must check with int_fits_type_p as well. */
9838 prev_value = DECL_INITIAL (TREE_VALUE (TYPE_VALUES (enumtype)));
9839 overflowed = add_double (TREE_INT_CST_LOW (prev_value),
9840 TREE_INT_CST_HIGH (prev_value),
9842 value = build_int_cst_wide (TREE_TYPE (prev_value), lo, hi);
9843 overflowed |= !int_fits_type_p (value, TREE_TYPE (prev_value));
9846 error ("overflow in enumeration values at %qD", name);
9849 value = integer_zero_node;
9852 /* Remove no-op casts from the value. */
9853 STRIP_TYPE_NOPS (value);
9856 /* C++ associates enums with global, function, or class declarations. */
9857 context = current_scope ();
9859 /* Build the actual enumeration constant. Note that the enumeration
9860 constants have the type of their initializers until the
9861 enumeration is complete:
9865 Following the closing brace of an enum-specifier, each enumer-
9866 ator has the type of its enumeration. Prior to the closing
9867 brace, the type of each enumerator is the type of its
9870 In finish_enum we will reset the type. Of course, if we're
9871 processing a template, there may be no value. */
9872 type = value ? TREE_TYPE (value) : NULL_TREE;
9874 if (context && context == current_class_type)
9875 /* This enum declaration is local to the class. We need the full
9876 lang_decl so that we can record DECL_CLASS_CONTEXT, for example. */
9877 decl = build_lang_decl (CONST_DECL, name, type);
9879 /* It's a global enum, or it's local to a function. (Note local to
9880 a function could mean local to a class method. */
9881 decl = build_decl (CONST_DECL, name, type);
9883 DECL_CONTEXT (decl) = FROB_CONTEXT (context);
9884 TREE_CONSTANT (decl) = 1;
9885 TREE_INVARIANT (decl) = 1;
9886 TREE_READONLY (decl) = 1;
9887 DECL_INITIAL (decl) = value;
9889 if (context && context == current_class_type)
9890 /* In something like `struct S { enum E { i = 7 }; };' we put `i'
9891 on the TYPE_FIELDS list for `S'. (That's so that you can say
9892 things like `S::i' later.) */
9893 finish_member_declaration (decl);
9897 /* Add this enumeration constant to the list for this type. */
9898 TYPE_VALUES (enumtype) = tree_cons (name, decl, TYPE_VALUES (enumtype));
9902 /* We're defining DECL. Make sure that it's type is OK. */
9905 check_function_type (tree decl, tree current_function_parms)
9907 tree fntype = TREE_TYPE (decl);
9908 tree return_type = complete_type (TREE_TYPE (fntype));
9910 /* In a function definition, arg types must be complete. */
9911 require_complete_types_for_parms (current_function_parms);
9913 if (dependent_type_p (return_type))
9915 if (!COMPLETE_OR_VOID_TYPE_P (return_type))
9917 error ("return type %q#T is incomplete", TREE_TYPE (fntype));
9919 /* Make it return void instead, but don't change the
9920 type of the DECL_RESULT, in case we have a named return value. */
9921 if (TREE_CODE (fntype) == METHOD_TYPE)
9923 tree ctype = TREE_TYPE (TREE_VALUE (TYPE_ARG_TYPES (fntype)));
9925 = build_method_type_directly (ctype,
9927 FUNCTION_ARG_CHAIN (decl));
9931 = build_function_type (void_type_node,
9932 TYPE_ARG_TYPES (TREE_TYPE (decl)));
9934 = build_exception_variant (fntype,
9935 TYPE_RAISES_EXCEPTIONS (fntype));
9938 abstract_virtuals_error (decl, TREE_TYPE (fntype));
9941 /* Create the FUNCTION_DECL for a function definition.
9942 DECLSPECS and DECLARATOR are the parts of the declaration;
9943 they describe the function's name and the type it returns,
9944 but twisted together in a fashion that parallels the syntax of C.
9946 FLAGS is a bitwise or of SF_PRE_PARSED (indicating that the
9947 DECLARATOR is really the DECL for the function we are about to
9948 process and that DECLSPECS should be ignored), SF_INCLASS_INLINE
9949 indicating that the function is an inline defined in-class.
9951 This function creates a binding context for the function body
9952 as well as setting up the FUNCTION_DECL in current_function_decl.
9954 For C++, we must first check whether that datum makes any sense.
9955 For example, "class A local_a(1,2);" means that variable local_a
9956 is an aggregate of type A, which should have a constructor
9957 applied to it with the argument list [1, 2]. */
9960 start_preparsed_function (tree decl1, tree attrs, int flags)
9962 tree ctype = NULL_TREE;
9965 int doing_friend = 0;
9966 struct cp_binding_level *bl;
9967 tree current_function_parms;
9968 struct c_fileinfo *finfo = get_fileinfo (lbasename (input_filename));
9971 gcc_assert (TREE_CODE (TREE_VALUE (void_list_node)) == VOID_TYPE);
9972 gcc_assert (TREE_CHAIN (void_list_node) == NULL_TREE);
9974 fntype = TREE_TYPE (decl1);
9975 if (TREE_CODE (fntype) == METHOD_TYPE)
9976 ctype = TYPE_METHOD_BASETYPE (fntype);
9978 /* ISO C++ 11.4/5. A friend function defined in a class is in
9979 the (lexical) scope of the class in which it is defined. */
9980 if (!ctype && DECL_FRIEND_P (decl1))
9982 ctype = DECL_FRIEND_CONTEXT (decl1);
9984 /* CTYPE could be null here if we're dealing with a template;
9985 for example, `inline friend float foo()' inside a template
9986 will have no CTYPE set. */
9987 if (ctype && TREE_CODE (ctype) != RECORD_TYPE)
9993 if (DECL_DECLARED_INLINE_P (decl1)
9994 && lookup_attribute ("noinline", attrs))
9995 warning ("%Jinline function %qD given attribute noinline", decl1, decl1);
9997 if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (decl1))
9998 /* This is a constructor, we must ensure that any default args
9999 introduced by this definition are propagated to the clones
10000 now. The clones are used directly in overload resolution. */
10001 adjust_clone_args (decl1);
10003 /* Sometimes we don't notice that a function is a static member, and
10004 build a METHOD_TYPE for it. Fix that up now. */
10005 if (ctype != NULL_TREE && DECL_STATIC_FUNCTION_P (decl1)
10006 && TREE_CODE (TREE_TYPE (decl1)) == METHOD_TYPE)
10008 revert_static_member_fn (decl1);
10012 /* Set up current_class_type, and enter the scope of the class, if
10015 push_nested_class (ctype);
10016 else if (DECL_STATIC_FUNCTION_P (decl1))
10017 push_nested_class (DECL_CONTEXT (decl1));
10019 /* Now that we have entered the scope of the class, we must restore
10020 the bindings for any template parameters surrounding DECL1, if it
10021 is an inline member template. (Order is important; consider the
10022 case where a template parameter has the same name as a field of
10023 the class.) It is not until after this point that
10024 PROCESSING_TEMPLATE_DECL is guaranteed to be set up correctly. */
10025 if (flags & SF_INCLASS_INLINE)
10026 maybe_begin_member_template_processing (decl1);
10028 /* Effective C++ rule 15. */
10030 && DECL_OVERLOADED_OPERATOR_P (decl1) == NOP_EXPR
10031 && TREE_CODE (TREE_TYPE (fntype)) == VOID_TYPE)
10032 warning ("%<operator=%> should return a reference to %<*this%>");
10034 /* Make the init_value nonzero so pushdecl knows this is not tentative.
10035 error_mark_node is replaced below (in poplevel) with the BLOCK. */
10036 if (!DECL_INITIAL (decl1))
10037 DECL_INITIAL (decl1) = error_mark_node;
10039 /* This function exists in static storage.
10040 (This does not mean `static' in the C sense!) */
10041 TREE_STATIC (decl1) = 1;
10043 /* We must call push_template_decl after current_class_type is set
10044 up. (If we are processing inline definitions after exiting a
10045 class scope, current_class_type will be NULL_TREE until set above
10046 by push_nested_class.) */
10047 if (processing_template_decl)
10048 decl1 = push_template_decl (decl1);
10050 /* We are now in the scope of the function being defined. */
10051 current_function_decl = decl1;
10053 /* Save the parm names or decls from this function's declarator
10054 where store_parm_decls will find them. */
10055 current_function_parms = DECL_ARGUMENTS (decl1);
10057 /* Make sure the parameter and return types are reasonable. When
10058 you declare a function, these types can be incomplete, but they
10059 must be complete when you define the function. */
10060 check_function_type (decl1, current_function_parms);
10062 /* Build the return declaration for the function. */
10063 restype = TREE_TYPE (fntype);
10064 /* Promote the value to int before returning it. */
10065 if (c_promoting_integer_type_p (restype))
10066 restype = type_promotes_to (restype);
10067 if (DECL_RESULT (decl1) == NULL_TREE)
10071 resdecl = build_decl (RESULT_DECL, 0, TYPE_MAIN_VARIANT (restype));
10072 DECL_ARTIFICIAL (resdecl) = 1;
10073 DECL_IGNORED_P (resdecl) = 1;
10074 DECL_RESULT (decl1) = resdecl;
10076 c_apply_type_quals_to_decl (cp_type_quals (restype), resdecl);
10079 /* Initialize RTL machinery. We cannot do this until
10080 CURRENT_FUNCTION_DECL and DECL_RESULT are set up. We do this
10081 even when processing a template; this is how we get
10082 CFUN set up, and our per-function variables initialized.
10083 FIXME factor out the non-RTL stuff. */
10084 bl = current_binding_level;
10085 allocate_struct_function (decl1);
10086 current_binding_level = bl;
10088 /* Even though we're inside a function body, we still don't want to
10089 call expand_expr to calculate the size of a variable-sized array.
10090 We haven't necessarily assigned RTL to all variables yet, so it's
10091 not safe to try to expand expressions involving them. */
10092 cfun->x_dont_save_pending_sizes_p = 1;
10094 /* Start the statement-tree, start the tree now. */
10095 DECL_SAVED_TREE (decl1) = push_stmt_list ();
10097 /* Let the user know we're compiling this function. */
10098 announce_function (decl1);
10100 /* Record the decl so that the function name is defined.
10101 If we already have a decl for this name, and it is a FUNCTION_DECL,
10102 use the old decl. */
10103 if (!processing_template_decl && !(flags & SF_PRE_PARSED))
10105 /* A specialization is not used to guide overload resolution. */
10106 if (!DECL_FUNCTION_MEMBER_P (decl1)
10107 && !(DECL_USE_TEMPLATE (decl1) &&
10108 PRIMARY_TEMPLATE_P (DECL_TI_TEMPLATE (decl1))))
10110 tree olddecl = pushdecl (decl1);
10112 if (olddecl == error_mark_node)
10113 /* If something went wrong when registering the declaration,
10114 use DECL1; we have to have a FUNCTION_DECL to use when
10115 parsing the body of the function. */
10118 /* Otherwise, OLDDECL is either a previous declaration of
10119 the same function or DECL1 itself. */
10124 /* We need to set the DECL_CONTEXT. */
10125 if (!DECL_CONTEXT (decl1) && DECL_TEMPLATE_INFO (decl1))
10126 DECL_CONTEXT (decl1) = DECL_CONTEXT (DECL_TI_TEMPLATE (decl1));
10127 /* And make sure we have enough default args. */
10128 check_default_args (decl1);
10130 fntype = TREE_TYPE (decl1);
10133 /* Determine the ELF visibility attribute for the function. We must
10134 not do this before calling "pushdecl", as we must allow
10135 "duplicate_decls" to merge any attributes appropriately. */
10136 if (!DECL_CLONED_FUNCTION_P (decl1))
10137 determine_visibility (decl1);
10139 /* Reset these in case the call to pushdecl changed them. */
10140 current_function_decl = decl1;
10141 cfun->decl = decl1;
10143 /* If we are (erroneously) defining a function that we have already
10144 defined before, wipe out what we knew before. */
10145 if (!DECL_PENDING_INLINE_P (decl1))
10146 DECL_SAVED_FUNCTION_DATA (decl1) = NULL;
10148 if (ctype && !doing_friend && !DECL_STATIC_FUNCTION_P (decl1))
10150 /* We know that this was set up by `grokclassfn'. We do not
10151 wait until `store_parm_decls', since evil parse errors may
10152 never get us to that point. Here we keep the consistency
10153 between `current_class_type' and `current_class_ptr'. */
10154 tree t = DECL_ARGUMENTS (decl1);
10156 gcc_assert (t != NULL_TREE && TREE_CODE (t) == PARM_DECL);
10157 gcc_assert (TREE_CODE (TREE_TYPE (t)) == POINTER_TYPE);
10159 cp_function_chain->x_current_class_ref
10160 = build_indirect_ref (t, NULL);
10161 cp_function_chain->x_current_class_ptr = t;
10163 /* Constructors and destructors need to know whether they're "in
10164 charge" of initializing virtual base classes. */
10165 t = TREE_CHAIN (t);
10166 if (DECL_HAS_IN_CHARGE_PARM_P (decl1))
10168 current_in_charge_parm = t;
10169 t = TREE_CHAIN (t);
10171 if (DECL_HAS_VTT_PARM_P (decl1))
10173 gcc_assert (DECL_NAME (t) == vtt_parm_identifier);
10174 current_vtt_parm = t;
10178 if (DECL_INTERFACE_KNOWN (decl1))
10180 tree ctx = decl_function_context (decl1);
10182 if (DECL_NOT_REALLY_EXTERN (decl1))
10183 DECL_EXTERNAL (decl1) = 0;
10185 if (ctx != NULL_TREE && DECL_DECLARED_INLINE_P (ctx)
10186 && TREE_PUBLIC (ctx))
10187 /* This is a function in a local class in an extern inline
10189 comdat_linkage (decl1);
10191 /* If this function belongs to an interface, it is public.
10192 If it belongs to someone else's interface, it is also external.
10193 This only affects inlines and template instantiations. */
10194 else if (finfo->interface_unknown == 0
10195 && ! DECL_TEMPLATE_INSTANTIATION (decl1))
10197 if (DECL_DECLARED_INLINE_P (decl1)
10198 || DECL_TEMPLATE_INSTANTIATION (decl1)
10199 || processing_template_decl)
10201 DECL_EXTERNAL (decl1)
10202 = (finfo->interface_only
10203 || (DECL_DECLARED_INLINE_P (decl1)
10204 && ! flag_implement_inlines
10205 && !DECL_VINDEX (decl1)));
10207 /* For WIN32 we also want to put these in linkonce sections. */
10208 maybe_make_one_only (decl1);
10211 DECL_EXTERNAL (decl1) = 0;
10212 DECL_NOT_REALLY_EXTERN (decl1) = 0;
10213 DECL_INTERFACE_KNOWN (decl1) = 1;
10214 /* If this function is in an interface implemented in this file,
10215 make sure that the backend knows to emit this function
10217 if (!DECL_EXTERNAL (decl1))
10218 mark_needed (decl1);
10220 else if (finfo->interface_unknown && finfo->interface_only
10221 && ! DECL_TEMPLATE_INSTANTIATION (decl1))
10223 /* If MULTIPLE_SYMBOL_SPACES is defined and we saw a #pragma
10224 interface, we will have both finfo->interface_unknown and
10225 finfo->interface_only set. In that case, we don't want to
10226 use the normal heuristics because someone will supply a
10227 #pragma implementation elsewhere, and deducing it here would
10228 produce a conflict. */
10229 comdat_linkage (decl1);
10230 DECL_EXTERNAL (decl1) = 0;
10231 DECL_INTERFACE_KNOWN (decl1) = 1;
10232 DECL_DEFER_OUTPUT (decl1) = 1;
10236 /* This is a definition, not a reference.
10237 So clear DECL_EXTERNAL. */
10238 DECL_EXTERNAL (decl1) = 0;
10240 if ((DECL_DECLARED_INLINE_P (decl1)
10241 || DECL_TEMPLATE_INSTANTIATION (decl1))
10242 && ! DECL_INTERFACE_KNOWN (decl1)
10243 /* Don't try to defer nested functions for now. */
10244 && ! decl_function_context (decl1))
10245 DECL_DEFER_OUTPUT (decl1) = 1;
10247 DECL_INTERFACE_KNOWN (decl1) = 1;
10250 begin_scope (sk_function_parms, decl1);
10254 if (DECL_DESTRUCTOR_P (decl1)
10255 || (DECL_CONSTRUCTOR_P (decl1)
10256 && targetm.cxx.cdtor_returns_this ()))
10258 cdtor_label = build_decl (LABEL_DECL, NULL_TREE, NULL_TREE);
10259 DECL_CONTEXT (cdtor_label) = current_function_decl;
10262 start_fname_decls ();
10264 store_parm_decls (current_function_parms);
10268 /* Like start_preparsed_function, except that instead of a
10269 FUNCTION_DECL, this function takes DECLSPECS and DECLARATOR.
10271 Returns 1 on success. If the DECLARATOR is not suitable for a function
10272 (it defines a datum instead), we return 0, which tells
10273 yyparse to report a parse error. */
10276 start_function (cp_decl_specifier_seq *declspecs,
10277 const cp_declarator *declarator,
10282 if (have_extern_spec)
10284 declspecs->storage_class = sc_extern;
10285 /* This should only be done once on the outermost decl. */
10286 have_extern_spec = false;
10289 decl1 = grokdeclarator (declarator, declspecs, FUNCDEF, 1, &attrs);
10290 /* If the declarator is not suitable for a function definition,
10291 cause a syntax error. */
10292 if (decl1 == NULL_TREE || TREE_CODE (decl1) != FUNCTION_DECL)
10295 /* If #pragma weak was used, mark the decl weak now. */
10296 if (global_scope_p (current_binding_level))
10297 maybe_apply_pragma_weak (decl1);
10299 if (DECL_MAIN_P (decl1))
10300 /* main must return int. grokfndecl should have corrected it
10301 (and issued a diagnostic) if the user got it wrong. */
10302 gcc_assert (same_type_p (TREE_TYPE (TREE_TYPE (decl1)),
10303 integer_type_node));
10305 start_preparsed_function (decl1, attrs, /*flags=*/SF_DEFAULT);
10310 /* Store the parameter declarations into the current function declaration.
10311 This is called after parsing the parameter declarations, before
10312 digesting the body of the function.
10314 Also install to binding contour return value identifier, if any. */
10317 store_parm_decls (tree current_function_parms)
10319 tree fndecl = current_function_decl;
10322 /* This is a chain of any other decls that came in among the parm
10323 declarations. If a parm is declared with enum {foo, bar} x;
10324 then CONST_DECLs for foo and bar are put here. */
10325 tree nonparms = NULL_TREE;
10327 if (current_function_parms)
10329 /* This case is when the function was defined with an ANSI prototype.
10330 The parms already have decls, so we need not do anything here
10331 except record them as in effect
10332 and complain if any redundant old-style parm decls were written. */
10334 tree specparms = current_function_parms;
10337 /* Must clear this because it might contain TYPE_DECLs declared
10339 current_binding_level->names = NULL;
10341 /* If we're doing semantic analysis, then we'll call pushdecl
10342 for each of these. We must do them in reverse order so that
10343 they end in the correct forward order. */
10344 specparms = nreverse (specparms);
10346 for (parm = specparms; parm; parm = next)
10348 next = TREE_CHAIN (parm);
10349 if (TREE_CODE (parm) == PARM_DECL)
10351 if (DECL_NAME (parm) == NULL_TREE
10352 || TREE_CODE (parm) != VOID_TYPE)
10355 error ("parameter %qD declared void", parm);
10359 /* If we find an enum constant or a type tag,
10360 put it aside for the moment. */
10361 TREE_CHAIN (parm) = NULL_TREE;
10362 nonparms = chainon (nonparms, parm);
10366 /* Get the decls in their original chain order and record in the
10367 function. This is all and only the PARM_DECLs that were
10368 pushed into scope by the loop above. */
10369 DECL_ARGUMENTS (fndecl) = getdecls ();
10372 DECL_ARGUMENTS (fndecl) = NULL_TREE;
10374 /* Now store the final chain of decls for the arguments
10375 as the decl-chain of the current lexical scope.
10376 Put the enumerators in as well, at the front so that
10377 DECL_ARGUMENTS is not modified. */
10378 current_binding_level->names = chainon (nonparms, DECL_ARGUMENTS (fndecl));
10380 /* For a cloned function, we've already got all the code we need;
10381 there's no need to add any extra bits. */
10382 if (!DECL_CLONED_FUNCTION_P (fndecl))
10384 /* Do the starting of the exception specifications, if we have any. */
10385 if (flag_exceptions && !processing_template_decl
10386 && flag_enforce_eh_specs
10387 && TYPE_RAISES_EXCEPTIONS (TREE_TYPE (current_function_decl)))
10388 current_eh_spec_block = begin_eh_spec_block ();
10393 /* We have finished doing semantic analysis on DECL, but have not yet
10394 generated RTL for its body. Save away our current state, so that
10395 when we want to generate RTL later we know what to do. */
10398 save_function_data (tree decl)
10400 struct language_function *f;
10402 /* Save the language-specific per-function data so that we can
10403 get it back when we really expand this function. */
10404 gcc_assert (!DECL_PENDING_INLINE_P (decl));
10407 f = GGC_NEW (struct language_function);
10408 memcpy (f, cp_function_chain, sizeof (struct language_function));
10409 DECL_SAVED_FUNCTION_DATA (decl) = f;
10411 /* Clear out the bits we don't need. */
10412 f->base.x_stmt_tree.x_cur_stmt_list = NULL_TREE;
10413 f->x_named_label_uses = NULL;
10414 f->bindings = NULL;
10415 f->x_local_names = NULL;
10419 /* Set the return value of the constructor (if present). */
10422 finish_constructor_body (void)
10427 if (targetm.cxx.cdtor_returns_this ())
10429 /* Any return from a constructor will end up here. */
10430 add_stmt (build_stmt (LABEL_EXPR, cdtor_label));
10432 val = DECL_ARGUMENTS (current_function_decl);
10433 val = build2 (MODIFY_EXPR, TREE_TYPE (val),
10434 DECL_RESULT (current_function_decl), val);
10435 /* Return the address of the object. */
10436 exprstmt = build_stmt (RETURN_EXPR, val);
10437 add_stmt (exprstmt);
10441 /* Do all the processing for the beginning of a destructor; set up the
10442 vtable pointers and cleanups for bases and members. */
10445 begin_destructor_body (void)
10448 tree compound_stmt;
10450 /* If the dtor is empty, and we know there is not any possible
10451 way we could use any vtable entries, before they are possibly
10452 set by a base class dtor, we don't have to setup the vtables,
10453 as we know that any base class dtor will set up any vtables
10454 it needs. We avoid MI, because one base class dtor can do a
10455 virtual dispatch to an overridden function that would need to
10456 have a non-related vtable set up, we cannot avoid setting up
10457 vtables in that case. We could change this to see if there
10458 is just one vtable.
10460 ??? In the destructor for a class, the vtables are set
10461 appropriately for that class. There will be no non-related
10462 vtables. jason 2001-12-11. */
10463 if_stmt = begin_if_stmt ();
10465 /* If it is not safe to avoid setting up the vtables, then
10466 someone will change the condition to be boolean_true_node.
10467 (Actually, for now, we do not have code to set the condition
10468 appropriately, so we just assume that we always need to
10469 initialize the vtables.) */
10470 finish_if_stmt_cond (boolean_true_node, if_stmt);
10472 compound_stmt = begin_compound_stmt (0);
10474 /* Make all virtual function table pointers in non-virtual base
10475 classes point to CURRENT_CLASS_TYPE's virtual function
10477 initialize_vtbl_ptrs (current_class_ptr);
10479 finish_compound_stmt (compound_stmt);
10480 finish_then_clause (if_stmt);
10481 finish_if_stmt (if_stmt);
10483 /* And insert cleanups for our bases and members so that they
10484 will be properly destroyed if we throw. */
10485 push_base_cleanups ();
10488 /* At the end of every destructor we generate code to delete the object if
10489 necessary. Do that now. */
10492 finish_destructor_body (void)
10496 /* Any return from a destructor will end up here; that way all base
10497 and member cleanups will be run when the function returns. */
10498 add_stmt (build_stmt (LABEL_EXPR, cdtor_label));
10500 /* In a virtual destructor, we must call delete. */
10501 if (DECL_VIRTUAL_P (current_function_decl))
10504 tree virtual_size = cxx_sizeof (current_class_type);
10508 At the point of definition of a virtual destructor (including
10509 an implicit definition), non-placement operator delete shall
10510 be looked up in the scope of the destructor's class and if
10511 found shall be accessible and unambiguous. */
10512 exprstmt = build_op_delete_call
10513 (DELETE_EXPR, current_class_ptr, virtual_size,
10514 /*global_p=*/false, NULL_TREE);
10516 if_stmt = begin_if_stmt ();
10517 finish_if_stmt_cond (build2 (BIT_AND_EXPR, integer_type_node,
10518 current_in_charge_parm,
10521 finish_expr_stmt (exprstmt);
10522 finish_then_clause (if_stmt);
10523 finish_if_stmt (if_stmt);
10526 if (targetm.cxx.cdtor_returns_this ())
10530 val = DECL_ARGUMENTS (current_function_decl);
10531 val = build2 (MODIFY_EXPR, TREE_TYPE (val),
10532 DECL_RESULT (current_function_decl), val);
10533 /* Return the address of the object. */
10534 exprstmt = build_stmt (RETURN_EXPR, val);
10535 add_stmt (exprstmt);
10539 /* Do the necessary processing for the beginning of a function body, which
10540 in this case includes member-initializers, but not the catch clauses of
10541 a function-try-block. Currently, this means opening a binding level
10542 for the member-initializers (in a ctor) and member cleanups (in a dtor).
10543 In other functions, this isn't necessary, but it doesn't hurt. */
10546 begin_function_body (void)
10550 if (processing_template_decl)
10551 /* Do nothing now. */;
10553 /* Always keep the BLOCK node associated with the outermost pair of
10554 curly braces of a function. These are needed for correct
10555 operation of dwarfout.c. */
10556 keep_next_level (true);
10558 stmt = begin_compound_stmt (BCS_FN_BODY);
10560 if (processing_template_decl)
10561 /* Do nothing now. */;
10562 else if (DECL_DESTRUCTOR_P (current_function_decl))
10563 begin_destructor_body ();
10568 /* Do the processing for the end of a function body. Currently, this means
10569 closing out the cleanups for fully-constructed bases and members, and in
10570 the case of the destructor, deleting the object if desired. Again, this
10571 is only meaningful for [cd]tors, since they are the only functions where
10572 there is a significant distinction between the main body and any
10573 function catch clauses. Handling, say, main() return semantics here
10574 would be wrong, as flowing off the end of a function catch clause for
10575 main() would also need to return 0. */
10578 finish_function_body (tree compstmt)
10580 /* Close the block. */
10581 finish_compound_stmt (compstmt);
10583 if (processing_template_decl)
10584 /* Do nothing now. */;
10585 else if (DECL_CONSTRUCTOR_P (current_function_decl))
10586 finish_constructor_body ();
10587 else if (DECL_DESTRUCTOR_P (current_function_decl))
10588 finish_destructor_body ();
10591 /* Finish up a function declaration and compile that function
10592 all the way to assembler language output. The free the storage
10593 for the function definition.
10595 FLAGS is a bitwise or of the following values:
10597 We just finished processing the body of an in-class inline
10598 function definition. (This processing will have taken place
10599 after the class definition is complete.) */
10602 finish_function (int flags)
10604 tree fndecl = current_function_decl;
10605 tree fntype, ctype = NULL_TREE;
10606 int inclass_inline = (flags & 2) != 0;
10609 /* When we get some parse errors, we can end up without a
10610 current_function_decl, so cope. */
10611 if (fndecl == NULL_TREE)
10612 return error_mark_node;
10614 if (DECL_NONSTATIC_MEMBER_FUNCTION_P (fndecl)
10615 && DECL_VIRTUAL_P (fndecl)
10616 && !processing_template_decl)
10618 tree fnclass = DECL_CONTEXT (fndecl);
10619 if (fndecl == CLASSTYPE_KEY_METHOD (fnclass))
10620 keyed_classes = tree_cons (NULL_TREE, fnclass, keyed_classes);
10623 nested = function_depth > 1;
10624 fntype = TREE_TYPE (fndecl);
10626 /* TREE_READONLY (fndecl) = 1;
10627 This caused &foo to be of type ptr-to-const-function
10628 which then got a warning when stored in a ptr-to-function variable. */
10630 gcc_assert (building_stmt_tree ());
10632 /* For a cloned function, we've already got all the code we need;
10633 there's no need to add any extra bits. */
10634 if (!DECL_CLONED_FUNCTION_P (fndecl))
10636 if (DECL_MAIN_P (current_function_decl))
10640 /* Make it so that `main' always returns 0 by default (or
10643 stmt = finish_return_stmt (integer_one_node);
10645 stmt = finish_return_stmt (integer_zero_node);
10647 /* Hack. We don't want the middle-end to warn that this
10648 return is unreachable, so put the statement on the
10650 annotate_with_file_line (stmt, input_filename, 0);
10653 /* Finish dealing with exception specifiers. */
10654 if (flag_exceptions && !processing_template_decl
10655 && flag_enforce_eh_specs
10656 && TYPE_RAISES_EXCEPTIONS (TREE_TYPE (current_function_decl)))
10657 finish_eh_spec_block (TYPE_RAISES_EXCEPTIONS
10658 (TREE_TYPE (current_function_decl)),
10659 current_eh_spec_block);
10662 /* If we're saving up tree structure, tie off the function now. */
10663 DECL_SAVED_TREE (fndecl) = pop_stmt_list (DECL_SAVED_TREE (fndecl));
10665 finish_fname_decls ();
10667 /* If this function can't throw any exceptions, remember that. */
10668 if (!processing_template_decl
10669 && !cp_function_chain->can_throw
10670 && !flag_non_call_exceptions)
10671 TREE_NOTHROW (fndecl) = 1;
10673 /* This must come after expand_function_end because cleanups might
10674 have declarations (from inline functions) that need to go into
10675 this function's blocks. */
10677 /* If the current binding level isn't the outermost binding level
10678 for this function, either there is a bug, or we have experienced
10679 syntax errors and the statement tree is malformed. */
10680 if (current_binding_level->kind != sk_function_parms)
10682 /* Make sure we have already experienced errors. */
10683 gcc_assert (errorcount);
10685 /* Throw away the broken statement tree and extra binding
10687 DECL_SAVED_TREE (fndecl) = alloc_stmt_list ();
10689 while (current_binding_level->kind != sk_function_parms)
10691 if (current_binding_level->kind == sk_class)
10692 pop_nested_class ();
10694 poplevel (0, 0, 0);
10697 poplevel (1, 0, 1);
10699 /* Statements should always be full-expressions at the outermost set
10700 of curly braces for a function. */
10701 gcc_assert (stmts_are_full_exprs_p ());
10703 /* Set up the named return value optimization, if we can. Candidate
10704 variables are selected in check_return_value. */
10705 if (current_function_return_value)
10707 tree r = current_function_return_value;
10710 if (r != error_mark_node
10711 /* This is only worth doing for fns that return in memory--and
10712 simpler, since we don't have to worry about promoted modes. */
10713 && aggregate_value_p (TREE_TYPE (TREE_TYPE (fndecl)), fndecl)
10714 /* Only allow this for variables declared in the outer scope of
10715 the function so we know that their lifetime always ends with a
10716 return; see g++.dg/opt/nrv6.C. We could be more flexible if
10717 we were to do this optimization in tree-ssa. */
10718 && (outer = BLOCK_SUBBLOCKS (DECL_INITIAL (fndecl)))
10719 /* Skip the artificial function body block. */
10720 && (outer = BLOCK_SUBBLOCKS (outer))
10721 && chain_member (r, BLOCK_VARS (outer)))
10722 finalize_nrv (&DECL_SAVED_TREE (fndecl), r, DECL_RESULT (fndecl));
10724 current_function_return_value = NULL_TREE;
10727 /* Remember that we were in class scope. */
10728 if (current_class_name)
10729 ctype = current_class_type;
10731 /* Must mark the RESULT_DECL as being in this function. */
10732 DECL_CONTEXT (DECL_RESULT (fndecl)) = fndecl;
10734 /* Set the BLOCK_SUPERCONTEXT of the outermost function scope to point
10735 to the FUNCTION_DECL node itself. */
10736 BLOCK_SUPERCONTEXT (DECL_INITIAL (fndecl)) = fndecl;
10738 /* Save away current state, if appropriate. */
10739 if (!processing_template_decl)
10740 save_function_data (fndecl);
10742 /* Complain if there's just no return statement. */
10743 if (warn_return_type
10744 && TREE_CODE (TREE_TYPE (fntype)) != VOID_TYPE
10745 && !dependent_type_p (TREE_TYPE (fntype))
10746 && !current_function_returns_value && !current_function_returns_null
10747 /* Don't complain if we abort or throw. */
10748 && !current_function_returns_abnormally
10749 && !DECL_NAME (DECL_RESULT (fndecl))
10750 /* Normally, with -Wreturn-type, flow will complain. Unless we're an
10751 inline function, as we might never be compiled separately. */
10752 && (DECL_INLINE (fndecl) || processing_template_decl)
10753 /* Structor return values (if any) are set by the compiler. */
10754 && !DECL_CONSTRUCTOR_P (fndecl)
10755 && !DECL_DESTRUCTOR_P (fndecl))
10756 warning ("no return statement in function returning non-void");
10758 /* Store the end of the function, so that we get good line number
10759 info for the epilogue. */
10760 cfun->function_end_locus = input_location;
10762 /* Genericize before inlining. */
10763 if (!processing_template_decl)
10765 struct language_function *f = DECL_SAVED_FUNCTION_DATA (fndecl);
10766 cp_genericize (fndecl);
10767 /* Clear out the bits we don't need. */
10768 f->x_current_class_ptr = NULL;
10769 f->x_current_class_ref = NULL;
10770 f->x_eh_spec_block = NULL;
10771 f->x_in_charge_parm = NULL;
10772 f->x_vtt_parm = NULL;
10773 f->x_return_value = NULL;
10774 f->bindings = NULL;
10776 /* Handle attribute((warn_unused_result)). Relies on gimple input. */
10777 c_warn_unused_result (&DECL_SAVED_TREE (fndecl));
10779 /* Clear out the bits we don't need. */
10780 local_names = NULL;
10781 named_label_uses = NULL;
10783 /* We're leaving the context of this function, so zap cfun. It's still in
10784 DECL_STRUCT_FUNCTION, and we'll restore it in tree_rest_of_compilation. */
10786 current_function_decl = NULL;
10788 /* If this is an in-class inline definition, we may have to pop the
10789 bindings for the template parameters that we added in
10790 maybe_begin_member_template_processing when start_function was
10792 if (inclass_inline)
10793 maybe_end_member_template_processing ();
10795 /* Leave the scope of the class. */
10797 pop_nested_class ();
10803 /* Let the error reporting routines know that we're outside a
10804 function. For a nested function, this value is used in
10805 cxx_pop_function_context and then reset via pop_function_context. */
10806 current_function_decl = NULL_TREE;
10811 /* Create the FUNCTION_DECL for a function definition.
10812 DECLSPECS and DECLARATOR are the parts of the declaration;
10813 they describe the return type and the name of the function,
10814 but twisted together in a fashion that parallels the syntax of C.
10816 This function creates a binding context for the function body
10817 as well as setting up the FUNCTION_DECL in current_function_decl.
10819 Returns a FUNCTION_DECL on success.
10821 If the DECLARATOR is not suitable for a function (it defines a datum
10822 instead), we return 0, which tells yyparse to report a parse error.
10824 May return void_type_node indicating that this method is actually
10825 a friend. See grokfield for more details.
10827 Came here with a `.pushlevel' .
10829 DO NOT MAKE ANY CHANGES TO THIS CODE WITHOUT MAKING CORRESPONDING
10830 CHANGES TO CODE IN `grokfield'. */
10833 start_method (cp_decl_specifier_seq *declspecs,
10834 const cp_declarator *declarator, tree attrlist)
10836 tree fndecl = grokdeclarator (declarator, declspecs, MEMFUNCDEF, 0,
10839 if (fndecl == error_mark_node)
10840 return error_mark_node;
10842 if (fndecl == NULL || TREE_CODE (fndecl) != FUNCTION_DECL)
10844 error ("invalid member function declaration");
10845 return error_mark_node;
10849 cplus_decl_attributes (&fndecl, attrlist, 0);
10851 /* Pass friends other than inline friend functions back. */
10852 if (fndecl == void_type_node)
10855 if (DECL_IN_AGGR_P (fndecl))
10857 if (DECL_CONTEXT (fndecl)
10858 && TREE_CODE( DECL_CONTEXT (fndecl)) != NAMESPACE_DECL)
10859 error ("%qD is already defined in class %qT", fndecl,
10860 DECL_CONTEXT (fndecl));
10861 return void_type_node;
10864 check_template_shadow (fndecl);
10866 DECL_DECLARED_INLINE_P (fndecl) = 1;
10867 if (flag_default_inline)
10868 DECL_INLINE (fndecl) = 1;
10870 /* We process method specializations in finish_struct_1. */
10871 if (processing_template_decl && !DECL_TEMPLATE_SPECIALIZATION (fndecl))
10873 fndecl = push_template_decl (fndecl);
10874 if (fndecl == error_mark_node)
10878 if (! DECL_FRIEND_P (fndecl))
10880 if (TREE_CHAIN (fndecl))
10882 fndecl = copy_node (fndecl);
10883 TREE_CHAIN (fndecl) = NULL_TREE;
10885 grok_special_member_properties (fndecl);
10888 cp_finish_decl (fndecl, NULL_TREE, NULL_TREE, 0);
10890 /* Make a place for the parms. */
10891 begin_scope (sk_function_parms, fndecl);
10893 DECL_IN_AGGR_P (fndecl) = 1;
10897 /* Go through the motions of finishing a function definition.
10898 We don't compile this method until after the whole class has
10901 FINISH_METHOD must return something that looks as though it
10902 came from GROKFIELD (since we are defining a method, after all).
10904 This is called after parsing the body of the function definition.
10905 STMTS is the chain of statements that makes up the function body.
10907 DECL is the ..._DECL that `start_method' provided. */
10910 finish_method (tree decl)
10912 tree fndecl = decl;
10917 if (decl == void_type_node)
10920 old_initial = DECL_INITIAL (fndecl);
10922 /* Undo the level for the parms (from start_method).
10923 This is like poplevel, but it causes nothing to be
10924 saved. Saving information here confuses symbol-table
10925 output routines. Besides, this information will
10926 be correctly output when this method is actually
10929 /* Clear out the meanings of the local variables of this level;
10930 also record in each decl which block it belongs to. */
10932 for (link = current_binding_level->names; link; link = TREE_CHAIN (link))
10934 if (DECL_NAME (link) != NULL_TREE)
10935 pop_binding (DECL_NAME (link), link);
10936 gcc_assert (TREE_CODE (link) != FUNCTION_DECL);
10937 DECL_CONTEXT (link) = NULL_TREE;
10940 poplevel (0, 0, 0);
10942 DECL_INITIAL (fndecl) = old_initial;
10944 /* We used to check if the context of FNDECL was different from
10945 current_class_type as another way to get inside here. This didn't work
10946 for String.cc in libg++. */
10947 if (DECL_FRIEND_P (fndecl))
10949 VEC_safe_push (tree, CLASSTYPE_INLINE_FRIENDS (current_class_type),
10951 decl = void_type_node;
10958 /* VAR is a VAR_DECL. If its type is incomplete, remember VAR so that
10959 we can lay it out later, when and if its type becomes complete. */
10962 maybe_register_incomplete_var (tree var)
10964 gcc_assert (TREE_CODE (var) == VAR_DECL);
10966 /* Keep track of variables with incomplete types. */
10967 if (!processing_template_decl && TREE_TYPE (var) != error_mark_node
10968 && DECL_EXTERNAL (var))
10970 tree inner_type = TREE_TYPE (var);
10972 while (TREE_CODE (inner_type) == ARRAY_TYPE)
10973 inner_type = TREE_TYPE (inner_type);
10974 inner_type = TYPE_MAIN_VARIANT (inner_type);
10976 if ((!COMPLETE_TYPE_P (inner_type) && CLASS_TYPE_P (inner_type))
10977 /* RTTI TD entries are created while defining the type_info. */
10978 || (TYPE_LANG_SPECIFIC (inner_type)
10979 && TYPE_BEING_DEFINED (inner_type)))
10980 incomplete_vars = tree_cons (inner_type, var, incomplete_vars);
10984 /* Called when a class type (given by TYPE) is defined. If there are
10985 any existing VAR_DECLs whose type hsa been completed by this
10986 declaration, update them now. */
10989 complete_vars (tree type)
10991 tree *list = &incomplete_vars;
10993 gcc_assert (CLASS_TYPE_P (type));
10996 if (same_type_p (type, TREE_PURPOSE (*list)))
10998 tree var = TREE_VALUE (*list);
10999 /* Complete the type of the variable. The VAR_DECL itself
11000 will be laid out in expand_expr. */
11001 complete_type (TREE_TYPE (var));
11002 /* Remove this entry from the list. */
11003 *list = TREE_CHAIN (*list);
11006 list = &TREE_CHAIN (*list);
11009 /* Check for pending declarations which may have abstract type. */
11010 complete_type_check_abstract (type);
11013 /* If DECL is of a type which needs a cleanup, build that cleanup
11017 cxx_maybe_build_cleanup (tree decl)
11019 tree type = TREE_TYPE (decl);
11021 if (type != error_mark_node && TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type))
11023 int flags = LOOKUP_NORMAL|LOOKUP_DESTRUCTOR;
11025 bool has_vbases = (TREE_CODE (type) == RECORD_TYPE
11026 && CLASSTYPE_VBASECLASSES (type));
11028 if (TREE_CODE (type) == ARRAY_TYPE)
11032 cxx_mark_addressable (decl);
11033 rval = build_unary_op (ADDR_EXPR, decl, 0);
11036 /* Optimize for space over speed here. */
11037 if (!has_vbases || flag_expensive_optimizations)
11038 flags |= LOOKUP_NONVIRTUAL;
11040 rval = build_delete (TREE_TYPE (rval), rval,
11041 sfk_complete_destructor, flags, 0);
11043 if (has_vbases && !TYPE_HAS_DESTRUCTOR (type))
11044 rval = build_compound_expr (rval, build_vbase_delete (type, decl));
11051 /* When a stmt has been parsed, this function is called. */
11058 /* DECL was originally constructed as a non-static member function,
11059 but turned out to be static. Update it accordingly. */
11062 revert_static_member_fn (tree decl)
11065 tree function = TREE_TYPE (decl);
11066 tree args = TYPE_ARG_TYPES (function);
11068 if (cp_type_quals (TREE_TYPE (TREE_VALUE (args)))
11069 != TYPE_UNQUALIFIED)
11070 error ("static member function %q#D declared with type qualifiers", decl);
11072 args = TREE_CHAIN (args);
11073 tmp = build_function_type (TREE_TYPE (function), args);
11074 tmp = build_qualified_type (tmp, cp_type_quals (function));
11075 tmp = build_exception_variant (tmp,
11076 TYPE_RAISES_EXCEPTIONS (function));
11077 TREE_TYPE (decl) = tmp;
11078 if (DECL_ARGUMENTS (decl))
11079 DECL_ARGUMENTS (decl) = TREE_CHAIN (DECL_ARGUMENTS (decl));
11080 DECL_STATIC_FUNCTION_P (decl) = 1;
11083 /* Initialize the variables used during compilation of a C++
11087 cxx_push_function_context (struct function * f)
11089 struct language_function *p = GGC_CNEW (struct language_function);
11092 /* Whenever we start a new function, we destroy temporaries in the
11094 current_stmt_tree ()->stmts_are_full_exprs_p = 1;
11100 if (DECL_SAVED_FUNCTION_DATA (fn))
11102 /* If we already parsed this function, and we're just expanding it
11103 now, restore saved state. */
11104 *cp_function_chain = *DECL_SAVED_FUNCTION_DATA (fn);
11106 /* We don't need the saved data anymore. Unless this is an inline
11107 function; we need the named return value info for
11108 declare_return_variable. */
11109 if (! DECL_INLINE (fn))
11110 DECL_SAVED_FUNCTION_DATA (fn) = NULL;
11115 /* Free the language-specific parts of F, now that we've finished
11116 compiling the function. */
11119 cxx_pop_function_context (struct function * f)
11124 /* Return which tree structure is used by T, or TS_CP_GENERIC if T is
11125 one of the language-independent trees. */
11127 enum cp_tree_node_structure_enum
11128 cp_tree_node_structure (union lang_tree_node * t)
11130 switch (TREE_CODE (&t->generic))
11132 case DEFAULT_ARG: return TS_CP_DEFAULT_ARG;
11133 case IDENTIFIER_NODE: return TS_CP_IDENTIFIER;
11134 case OVERLOAD: return TS_CP_OVERLOAD;
11135 case TEMPLATE_PARM_INDEX: return TS_CP_TPI;
11136 case TINST_LEVEL: return TS_CP_TINST_LEVEL;
11137 case PTRMEM_CST: return TS_CP_PTRMEM;
11138 case BASELINK: return TS_CP_BASELINK;
11139 default: return TS_CP_GENERIC;
11143 /* Build the void_list_node (void_type_node having been created). */
11145 build_void_list_node (void)
11147 tree t = build_tree_list (NULL_TREE, void_type_node);
11152 cp_missing_noreturn_ok_p (tree decl)
11154 /* A missing noreturn is ok for the `main' function. */
11155 return DECL_MAIN_P (decl);
11158 /* Return the COMDAT group into which DECL should be placed. */
11161 cxx_comdat_group (tree decl)
11165 /* Virtual tables, construction virtual tables, and virtual table
11166 tables all go in a single COMDAT group, named after the primary
11168 if (TREE_CODE (decl) == VAR_DECL && DECL_VTABLE_OR_VTT_P (decl))
11169 name = DECL_ASSEMBLER_NAME (CLASSTYPE_VTABLES (DECL_CONTEXT (decl)));
11170 /* For all other DECLs, the COMDAT group is the mangled name of the
11171 declaration itself. */
11173 name = DECL_ASSEMBLER_NAME (decl);
11175 return IDENTIFIER_POINTER (name);
11178 #include "gt-cp-decl.h"