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 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 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1945 function_size = sizeof (struct tree_decl);
1947 memcpy ((char *) olddecl + sizeof (struct tree_common),
1948 (char *) newdecl + sizeof (struct tree_common),
1949 function_size - sizeof (struct tree_common));
1951 if (DECL_TEMPLATE_INSTANTIATION (newdecl))
1952 /* If newdecl is a template instantiation, it is possible that
1953 the following sequence of events has occurred:
1955 o A friend function was declared in a class template. The
1956 class template was instantiated.
1958 o The instantiation of the friend declaration was
1959 recorded on the instantiation list, and is newdecl.
1961 o Later, however, instantiate_class_template called pushdecl
1962 on the newdecl to perform name injection. But, pushdecl in
1963 turn called duplicate_decls when it discovered that another
1964 declaration of a global function with the same name already
1967 o Here, in duplicate_decls, we decided to clobber newdecl.
1969 If we're going to do that, we'd better make sure that
1970 olddecl, and not newdecl, is on the list of
1971 instantiations so that if we try to do the instantiation
1972 again we won't get the clobbered declaration. */
1973 reregister_specialization (newdecl,
1974 DECL_TI_TEMPLATE (newdecl),
1979 memcpy ((char *) olddecl + sizeof (struct tree_common),
1980 (char *) newdecl + sizeof (struct tree_common),
1981 sizeof (struct tree_decl) - sizeof (struct tree_common)
1982 + TREE_CODE_LENGTH (TREE_CODE (newdecl)) * sizeof (char *));
1985 DECL_UID (olddecl) = olddecl_uid;
1987 DECL_FRIEND_P (olddecl) = 1;
1989 /* NEWDECL contains the merged attribute lists.
1990 Update OLDDECL to be the same. */
1991 DECL_ATTRIBUTES (olddecl) = DECL_ATTRIBUTES (newdecl);
1993 /* If OLDDECL had its DECL_RTL instantiated, re-invoke make_decl_rtl
1994 so that encode_section_info has a chance to look at the new decl
1995 flags and attributes. */
1996 if (DECL_RTL_SET_P (olddecl)
1997 && (TREE_CODE (olddecl) == FUNCTION_DECL
1998 || (TREE_CODE (olddecl) == VAR_DECL
1999 && TREE_STATIC (olddecl))))
2000 make_decl_rtl (olddecl);
2005 /* Return zero if the declaration NEWDECL is valid
2006 when the declaration OLDDECL (assumed to be for the same name)
2007 has already been seen.
2008 Otherwise return an error message format string with a %s
2009 where the identifier should go. */
2012 redeclaration_error_message (tree newdecl, tree olddecl)
2014 if (TREE_CODE (newdecl) == TYPE_DECL)
2016 /* Because C++ can put things into name space for free,
2017 constructs like "typedef struct foo { ... } foo"
2018 would look like an erroneous redeclaration. */
2019 if (same_type_p (TREE_TYPE (newdecl), TREE_TYPE (olddecl)))
2022 return "redefinition of %q#D";
2024 else if (TREE_CODE (newdecl) == FUNCTION_DECL)
2026 /* If this is a pure function, its olddecl will actually be
2027 the original initialization to `0' (which we force to call
2028 abort()). Don't complain about redefinition in this case. */
2029 if (DECL_LANG_SPECIFIC (olddecl) && DECL_PURE_VIRTUAL_P (olddecl))
2032 /* If both functions come from different namespaces, this is not
2033 a redeclaration - this is a conflict with a used function. */
2034 if (DECL_NAMESPACE_SCOPE_P (olddecl)
2035 && DECL_CONTEXT (olddecl) != DECL_CONTEXT (newdecl))
2036 return "%qD conflicts with used function";
2038 /* We'll complain about linkage mismatches in
2039 warn_extern_redeclared_static. */
2041 /* Defining the same name twice is no good. */
2042 if (DECL_INITIAL (olddecl) != NULL_TREE
2043 && DECL_INITIAL (newdecl) != NULL_TREE)
2045 if (DECL_NAME (olddecl) == NULL_TREE)
2046 return "%q#D not declared in class";
2048 return "redefinition of %q#D";
2052 else if (TREE_CODE (newdecl) == TEMPLATE_DECL)
2056 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == TYPE_DECL)
2058 if (COMPLETE_TYPE_P (TREE_TYPE (newdecl))
2059 && COMPLETE_TYPE_P (TREE_TYPE (olddecl)))
2060 return "redefinition of %q#D";
2064 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) != FUNCTION_DECL
2065 || (DECL_TEMPLATE_RESULT (newdecl)
2066 == DECL_TEMPLATE_RESULT (olddecl)))
2069 nt = DECL_TEMPLATE_RESULT (newdecl);
2070 if (DECL_TEMPLATE_INFO (nt))
2071 nt = DECL_TEMPLATE_RESULT (template_for_substitution (nt));
2072 ot = DECL_TEMPLATE_RESULT (olddecl);
2073 if (DECL_TEMPLATE_INFO (ot))
2074 ot = DECL_TEMPLATE_RESULT (template_for_substitution (ot));
2075 if (DECL_INITIAL (nt) && DECL_INITIAL (ot))
2076 return "redefinition of %q#D";
2080 else if (toplevel_bindings_p () || DECL_NAMESPACE_SCOPE_P (newdecl))
2082 /* Objects declared at top level: */
2083 /* If at least one is a reference, it's ok. */
2084 if (DECL_EXTERNAL (newdecl) || DECL_EXTERNAL (olddecl))
2086 /* Reject two definitions. */
2087 return "redefinition of %q#D";
2091 /* Objects declared with block scope: */
2092 /* Reject two definitions, and reject a definition
2093 together with an external reference. */
2094 if (!(DECL_EXTERNAL (newdecl) && DECL_EXTERNAL (olddecl)))
2095 return "redeclaration of %q#D";
2100 /* Create a new label, named ID. */
2103 make_label_decl (tree id, int local_p)
2107 decl = build_decl (LABEL_DECL, id, void_type_node);
2109 DECL_CONTEXT (decl) = current_function_decl;
2110 DECL_MODE (decl) = VOIDmode;
2111 C_DECLARED_LABEL_FLAG (decl) = local_p;
2113 /* Say where one reference is to the label, for the sake of the
2114 error if it is not defined. */
2115 DECL_SOURCE_LOCATION (decl) = input_location;
2117 /* Record the fact that this identifier is bound to this label. */
2118 SET_IDENTIFIER_LABEL_VALUE (id, decl);
2123 /* Record this label on the list of used labels so that we can check
2124 at the end of the function to see whether or not the label was
2125 actually defined, and so we can check when the label is defined whether
2126 this use is valid. */
2129 use_label (tree decl)
2131 if (named_label_uses == NULL
2132 || named_label_uses->names_in_scope != current_binding_level->names
2133 || named_label_uses->label_decl != decl)
2135 struct named_label_use_list *new_ent;
2136 new_ent = GGC_NEW (struct named_label_use_list);
2137 new_ent->label_decl = decl;
2138 new_ent->names_in_scope = current_binding_level->names;
2139 new_ent->binding_level = current_binding_level;
2140 new_ent->o_goto_locus = input_location;
2141 new_ent->next = named_label_uses;
2142 named_label_uses = new_ent;
2146 /* Look for a label named ID in the current function. If one cannot
2147 be found, create one. (We keep track of used, but undefined,
2148 labels, and complain about them at the end of a function.) */
2151 lookup_label (tree id)
2154 struct named_label_list *ent;
2156 timevar_push (TV_NAME_LOOKUP);
2157 /* You can't use labels at global scope. */
2158 if (current_function_decl == NULL_TREE)
2160 error ("label %qE referenced outside of any function", id);
2161 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, NULL_TREE);
2164 /* See if we've already got this label. */
2165 decl = IDENTIFIER_LABEL_VALUE (id);
2166 if (decl != NULL_TREE && DECL_CONTEXT (decl) == current_function_decl)
2167 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, decl);
2169 /* Record this label on the list of labels used in this function.
2170 We do this before calling make_label_decl so that we get the
2171 IDENTIFIER_LABEL_VALUE before the new label is declared. */
2172 ent = GGC_CNEW (struct named_label_list);
2173 ent->old_value = IDENTIFIER_LABEL_VALUE (id);
2174 ent->next = named_labels;
2177 /* We need a new label. */
2178 decl = make_label_decl (id, /*local_p=*/0);
2180 /* Now fill in the information we didn't have before. */
2181 ent->label_decl = decl;
2183 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, decl);
2186 /* Declare a local label named ID. */
2189 declare_local_label (tree id)
2193 /* Add a new entry to the SHADOWED_LABELS list so that when we leave
2194 this scope we can restore the old value of
2195 IDENTIFIER_TYPE_VALUE. */
2196 current_binding_level->shadowed_labels
2197 = tree_cons (IDENTIFIER_LABEL_VALUE (id), NULL_TREE,
2198 current_binding_level->shadowed_labels);
2199 /* Look for the label. */
2200 decl = make_label_decl (id, /*local_p=*/1);
2201 /* Now fill in the information we didn't have before. */
2202 TREE_VALUE (current_binding_level->shadowed_labels) = decl;
2207 /* Returns nonzero if it is ill-formed to jump past the declaration of
2208 DECL. Returns 2 if it's also a real problem. */
2211 decl_jump_unsafe (tree decl)
2213 if (TREE_CODE (decl) != VAR_DECL || TREE_STATIC (decl))
2216 if (DECL_INITIAL (decl) == NULL_TREE
2217 && pod_type_p (TREE_TYPE (decl)))
2220 /* This is really only important if we're crossing an initialization.
2221 The POD stuff is just pedantry; why should it matter if the class
2222 contains a field of pointer to member type? */
2223 if (DECL_INITIAL (decl)
2224 || (TYPE_NEEDS_CONSTRUCTING (TREE_TYPE (decl))))
2229 /* Check that a single previously seen jump to a newly defined label
2230 is OK. DECL is the LABEL_DECL or 0; LEVEL is the binding_level for
2231 the jump context; NAMES are the names in scope in LEVEL at the jump
2232 context; FILE and LINE are the source position of the jump or 0. */
2235 check_previous_goto_1 (tree decl,
2236 struct cp_binding_level* level,
2237 tree names, const location_t *locus)
2241 struct cp_binding_level *b = current_binding_level;
2242 for (; b; b = b->level_chain)
2244 tree new_decls = b->names;
2245 tree old_decls = (b == level ? names : NULL_TREE);
2246 for (; new_decls != old_decls;
2247 new_decls = TREE_CHAIN (new_decls))
2249 int problem = decl_jump_unsafe (new_decls);
2256 pedwarn ("jump to label %qD", decl);
2258 pedwarn ("jump to case label");
2261 pedwarn ("%H from here", locus);
2266 cp_error_at (" crosses initialization of %q#D",
2269 cp_pedwarn_at (" enters scope of non-POD %q#D",
2275 if ((b->kind == sk_try || b->kind == sk_catch) && ! saw_eh)
2280 pedwarn ("jump to label %qD", decl);
2282 pedwarn ("jump to case label");
2285 pedwarn ("%H from here", locus);
2288 if (b->kind == sk_try)
2289 error (" enters try block");
2291 error (" enters catch block");
2298 check_previous_goto (struct named_label_use_list* use)
2300 check_previous_goto_1 (use->label_decl, use->binding_level,
2301 use->names_in_scope, &use->o_goto_locus);
2305 check_switch_goto (struct cp_binding_level* level)
2307 check_previous_goto_1 (NULL_TREE, level, level->names, NULL);
2310 /* Check that any previously seen jumps to a newly defined label DECL
2311 are OK. Called by define_label. */
2314 check_previous_gotos (tree decl)
2316 struct named_label_use_list **usep;
2318 if (! TREE_USED (decl))
2321 for (usep = &named_label_uses; *usep; )
2323 struct named_label_use_list *use = *usep;
2324 if (use->label_decl == decl)
2326 check_previous_goto (use);
2330 usep = &(use->next);
2334 /* Check that a new jump to a label DECL is OK. Called by
2335 finish_goto_stmt. */
2338 check_goto (tree decl)
2342 struct named_label_list *lab;
2344 /* We can't know where a computed goto is jumping. So we assume
2346 if (! DECL_P (decl))
2349 /* If the label hasn't been defined yet, defer checking. */
2350 if (! DECL_INITIAL (decl))
2356 for (lab = named_labels; lab; lab = lab->next)
2357 if (decl == lab->label_decl)
2360 /* If the label is not on named_labels it's a gcc local label, so
2361 it must be in an outer scope, so jumping to it is always OK. */
2365 if ((lab->in_try_scope || lab->in_catch_scope || lab->bad_decls)
2368 cp_pedwarn_at ("jump to label %qD", decl);
2369 pedwarn (" from here");
2373 for (bad = lab->bad_decls; bad; bad = TREE_CHAIN (bad))
2375 tree b = TREE_VALUE (bad);
2376 int u = decl_jump_unsafe (b);
2378 if (u > 1 && DECL_ARTIFICIAL (b))
2379 /* Can't skip init of __exception_info. */
2380 error ("%J enters catch block", b);
2382 cp_error_at (" skips initialization of %q#D", b);
2384 cp_pedwarn_at (" enters scope of non-POD %q#D", b);
2387 if (lab->in_try_scope)
2388 error (" enters try block");
2389 else if (lab->in_catch_scope)
2390 error (" enters catch block");
2393 /* Define a label, specifying the location in the source file.
2394 Return the LABEL_DECL node for the label. */
2397 define_label (location_t location, tree name)
2399 tree decl = lookup_label (name);
2400 struct named_label_list *ent;
2401 struct cp_binding_level *p;
2403 timevar_push (TV_NAME_LOOKUP);
2404 for (ent = named_labels; ent; ent = ent->next)
2405 if (ent->label_decl == decl)
2408 /* After labels, make any new cleanups in the function go into their
2409 own new (temporary) binding contour. */
2410 for (p = current_binding_level;
2411 p->kind != sk_function_parms;
2413 p->more_cleanups_ok = 0;
2415 if (name == get_identifier ("wchar_t"))
2416 pedwarn ("label named wchar_t");
2418 if (DECL_INITIAL (decl) != NULL_TREE)
2419 error ("duplicate label %qD", decl);
2422 /* Mark label as having been defined. */
2423 DECL_INITIAL (decl) = error_mark_node;
2424 /* Say where in the source. */
2425 DECL_SOURCE_LOCATION (decl) = location;
2428 ent->names_in_scope = current_binding_level->names;
2429 ent->binding_level = current_binding_level;
2431 check_previous_gotos (decl);
2434 timevar_pop (TV_NAME_LOOKUP);
2440 struct cp_binding_level *level;
2441 struct cp_switch *next;
2442 /* The SWITCH_STMT being built. */
2444 /* A splay-tree mapping the low element of a case range to the high
2445 element, or NULL_TREE if there is no high element. Used to
2446 determine whether or not a new case label duplicates an old case
2447 label. We need a tree, rather than simply a hash table, because
2448 of the GNU case range extension. */
2452 /* A stack of the currently active switch statements. The innermost
2453 switch statement is on the top of the stack. There is no need to
2454 mark the stack for garbage collection because it is only active
2455 during the processing of the body of a function, and we never
2456 collect at that point. */
2458 static struct cp_switch *switch_stack;
2460 /* Called right after a switch-statement condition is parsed.
2461 SWITCH_STMT is the switch statement being parsed. */
2464 push_switch (tree switch_stmt)
2466 struct cp_switch *p = xmalloc (sizeof (struct cp_switch));
2467 p->level = current_binding_level;
2468 p->next = switch_stack;
2469 p->switch_stmt = switch_stmt;
2470 p->cases = splay_tree_new (case_compare, NULL, NULL);
2477 struct cp_switch *cs = switch_stack;
2479 /* Emit warnings as needed. */
2480 c_do_switch_warnings (cs->cases, cs->switch_stmt);
2482 splay_tree_delete (cs->cases);
2483 switch_stack = switch_stack->next;
2487 /* Note that we've seen a definition of a case label, and complain if this
2488 is a bad place for one. */
2491 finish_case_label (tree low_value, tree high_value)
2494 struct cp_binding_level *p;
2496 if (processing_template_decl)
2500 /* For templates, just add the case label; we'll do semantic
2501 analysis at instantiation-time. */
2502 label = build_decl (LABEL_DECL, NULL_TREE, NULL_TREE);
2503 return add_stmt (build_case_label (low_value, high_value, label));
2506 /* Find the condition on which this switch statement depends. */
2507 cond = SWITCH_COND (switch_stack->switch_stmt);
2508 if (cond && TREE_CODE (cond) == TREE_LIST)
2509 cond = TREE_VALUE (cond);
2511 r = c_add_case_label (switch_stack->cases, cond, TREE_TYPE (cond),
2512 low_value, high_value);
2514 check_switch_goto (switch_stack->level);
2516 /* After labels, make any new cleanups in the function go into their
2517 own new (temporary) binding contour. */
2518 for (p = current_binding_level;
2519 p->kind != sk_function_parms;
2521 p->more_cleanups_ok = 0;
2526 /* Hash a TYPENAME_TYPE. K is really of type `tree'. */
2529 typename_hash (const void* k)
2534 hash = (htab_hash_pointer (TYPE_CONTEXT (t))
2535 ^ htab_hash_pointer (DECL_NAME (TYPE_NAME (t))));
2540 typedef struct typename_info {
2548 /* Compare two TYPENAME_TYPEs. K1 and K2 are really of type `tree'. */
2551 typename_compare (const void * k1, const void * k2)
2554 const typename_info *t2;
2557 t2 = (const typename_info *) k2;
2559 return (DECL_NAME (TYPE_NAME (t1)) == t2->name
2560 && TYPE_CONTEXT (t1) == t2->scope
2561 && TYPENAME_TYPE_FULLNAME (t1) == t2->template_id
2562 && TYPENAME_IS_ENUM_P (t1) == t2->enum_p
2563 && TYPENAME_IS_CLASS_P (t1) == t2->class_p);
2566 /* Build a TYPENAME_TYPE. If the type is `typename T::t', CONTEXT is
2567 the type of `T', NAME is the IDENTIFIER_NODE for `t'.
2569 Returns the new TYPENAME_TYPE. */
2571 static GTY ((param_is (union tree_node))) htab_t typename_htab;
2574 build_typename_type (tree context, tree name, tree fullname,
2575 enum tag_types tag_type)
2583 if (typename_htab == NULL)
2584 typename_htab = htab_create_ggc (61, &typename_hash,
2585 &typename_compare, NULL);
2587 ti.scope = FROB_CONTEXT (context);
2589 ti.template_id = fullname;
2590 ti.enum_p = tag_type == enum_type;
2591 ti.class_p = (tag_type == class_type
2592 || tag_type == record_type
2593 || tag_type == union_type);
2594 hash = (htab_hash_pointer (ti.scope)
2595 ^ htab_hash_pointer (ti.name));
2597 /* See if we already have this type. */
2598 e = htab_find_slot_with_hash (typename_htab, &ti, hash, INSERT);
2603 /* Build the TYPENAME_TYPE. */
2604 t = make_aggr_type (TYPENAME_TYPE);
2605 TYPE_CONTEXT (t) = ti.scope;
2606 TYPENAME_TYPE_FULLNAME (t) = ti.template_id;
2607 TYPENAME_IS_ENUM_P (t) = ti.enum_p;
2608 TYPENAME_IS_CLASS_P (t) = ti.class_p;
2610 /* Build the corresponding TYPE_DECL. */
2611 d = build_decl (TYPE_DECL, name, t);
2612 TYPE_NAME (TREE_TYPE (d)) = d;
2613 TYPE_STUB_DECL (TREE_TYPE (d)) = d;
2614 DECL_CONTEXT (d) = FROB_CONTEXT (context);
2615 DECL_ARTIFICIAL (d) = 1;
2617 /* Store it in the hash table. */
2624 /* Resolve `typename CONTEXT::NAME'. TAG_TYPE indicates the tag
2625 provided to name the type. Returns an appropriate type, unless an
2626 error occurs, in which case error_mark_node is returned. If we
2627 locate a non-artificial TYPE_DECL and TF_KEEP_TYPE_DECL is set, we
2628 return that, rather than the _TYPE it corresponds to, in other
2629 cases we look through the type decl. If TF_ERROR is set, complain
2630 about errors, otherwise be quiet. */
2633 make_typename_type (tree context, tree name, enum tag_types tag_type,
2634 tsubst_flags_t complain)
2638 if (name == error_mark_node
2639 || context == NULL_TREE
2640 || context == error_mark_node)
2641 return error_mark_node;
2645 if (!(TYPE_LANG_SPECIFIC (name)
2646 && (CLASSTYPE_IS_TEMPLATE (name)
2647 || CLASSTYPE_USE_TEMPLATE (name))))
2648 name = TYPE_IDENTIFIER (name);
2650 /* Create a TEMPLATE_ID_EXPR for the type. */
2651 name = build_nt (TEMPLATE_ID_EXPR,
2652 CLASSTYPE_TI_TEMPLATE (name),
2653 CLASSTYPE_TI_ARGS (name));
2655 else if (TREE_CODE (name) == TYPE_DECL)
2656 name = DECL_NAME (name);
2660 if (TREE_CODE (name) == TEMPLATE_ID_EXPR)
2662 name = TREE_OPERAND (name, 0);
2663 if (TREE_CODE (name) == TEMPLATE_DECL)
2664 name = TREE_OPERAND (fullname, 0) = DECL_NAME (name);
2666 if (TREE_CODE (name) == TEMPLATE_DECL)
2668 error ("%qD used without template parameters", name);
2669 return error_mark_node;
2671 gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE);
2672 gcc_assert (TYPE_P (context));
2674 if (!dependent_type_p (context)
2675 || currently_open_class (context))
2677 if (TREE_CODE (fullname) == TEMPLATE_ID_EXPR)
2679 tree tmpl = NULL_TREE;
2680 if (IS_AGGR_TYPE (context))
2681 tmpl = lookup_field (context, name, 0, false);
2682 if (!tmpl || !DECL_CLASS_TEMPLATE_P (tmpl))
2684 if (complain & tf_error)
2685 error ("no class template named %q#T in %q#T",
2687 return error_mark_node;
2690 if (complain & tf_error)
2691 perform_or_defer_access_check (TYPE_BINFO (context), tmpl);
2693 return lookup_template_class (tmpl,
2694 TREE_OPERAND (fullname, 1),
2696 /*entering_scope=*/0,
2697 tf_error | tf_warning | tf_user);
2703 if (!IS_AGGR_TYPE (context))
2705 if (complain & tf_error)
2706 error ("no type named %q#T in %q#T", name, context);
2707 return error_mark_node;
2710 t = lookup_field (context, name, 0, true);
2713 if (TREE_CODE (t) != TYPE_DECL)
2715 if (complain & tf_error)
2716 error ("no type named %q#T in %q#T", name, context);
2717 return error_mark_node;
2720 if (complain & tf_error)
2721 perform_or_defer_access_check (TYPE_BINFO (context), t);
2723 if (DECL_ARTIFICIAL (t) || !(complain & tf_keep_type_decl))
2731 /* If the CONTEXT is not a template type, then either the field is
2732 there now or its never going to be. */
2733 if (!dependent_type_p (context))
2735 if (complain & tf_error)
2736 error ("no type named %q#T in %q#T", name, context);
2737 return error_mark_node;
2740 return build_typename_type (context, name, fullname, tag_type);
2743 /* Resolve `CONTEXT::template NAME'. Returns a TEMPLATE_DECL if the name
2744 can be resolved or an UNBOUND_CLASS_TEMPLATE, unless an error occurs,
2745 in which case error_mark_node is returned.
2747 If PARM_LIST is non-NULL, also make sure that the template parameter
2748 list of TEMPLATE_DECL matches.
2750 If COMPLAIN zero, don't complain about any errors that occur. */
2753 make_unbound_class_template (tree context, tree name, tree parm_list,
2754 tsubst_flags_t complain)
2760 name = TYPE_IDENTIFIER (name);
2761 else if (DECL_P (name))
2762 name = DECL_NAME (name);
2763 gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE);
2765 if (!dependent_type_p (context)
2766 || currently_open_class (context))
2768 tree tmpl = NULL_TREE;
2770 if (IS_AGGR_TYPE (context))
2771 tmpl = lookup_field (context, name, 0, false);
2773 if (!tmpl || !DECL_CLASS_TEMPLATE_P (tmpl))
2775 if (complain & tf_error)
2776 error ("no class template named %q#T in %q#T", name, context);
2777 return error_mark_node;
2781 && !comp_template_parms (DECL_TEMPLATE_PARMS (tmpl), parm_list))
2783 if (complain & tf_error)
2785 error ("template parameters do not match template");
2786 cp_error_at ("%qD declared here", tmpl);
2788 return error_mark_node;
2791 if (complain & tf_error)
2792 perform_or_defer_access_check (TYPE_BINFO (context), tmpl);
2797 /* Build the UNBOUND_CLASS_TEMPLATE. */
2798 t = make_aggr_type (UNBOUND_CLASS_TEMPLATE);
2799 TYPE_CONTEXT (t) = FROB_CONTEXT (context);
2800 TREE_TYPE (t) = NULL_TREE;
2802 /* Build the corresponding TEMPLATE_DECL. */
2803 d = build_decl (TEMPLATE_DECL, name, t);
2804 TYPE_NAME (TREE_TYPE (d)) = d;
2805 TYPE_STUB_DECL (TREE_TYPE (d)) = d;
2806 DECL_CONTEXT (d) = FROB_CONTEXT (context);
2807 DECL_ARTIFICIAL (d) = 1;
2808 DECL_TEMPLATE_PARMS (d) = parm_list;
2815 /* Push the declarations of builtin types into the namespace.
2816 RID_INDEX is the index of the builtin type in the array
2817 RID_POINTERS. NAME is the name used when looking up the builtin
2818 type. TYPE is the _TYPE node for the builtin type. */
2821 record_builtin_type (enum rid rid_index,
2825 tree rname = NULL_TREE, tname = NULL_TREE;
2826 tree tdecl = NULL_TREE;
2828 if ((int) rid_index < (int) RID_MAX)
2829 rname = ridpointers[(int) rid_index];
2831 tname = get_identifier (name);
2833 /* The calls to SET_IDENTIFIER_GLOBAL_VALUE below should be
2834 eliminated. Built-in types should not be looked up name; their
2835 names are keywords that the parser can recognize. However, there
2836 is code in c-common.c that uses identifier_global_value to look
2837 up built-in types by name. */
2840 tdecl = build_decl (TYPE_DECL, tname, type);
2841 DECL_ARTIFICIAL (tdecl) = 1;
2842 SET_IDENTIFIER_GLOBAL_VALUE (tname, tdecl);
2848 tdecl = build_decl (TYPE_DECL, rname, type);
2849 DECL_ARTIFICIAL (tdecl) = 1;
2851 SET_IDENTIFIER_GLOBAL_VALUE (rname, tdecl);
2854 if (!TYPE_NAME (type))
2855 TYPE_NAME (type) = tdecl;
2858 debug_hooks->type_decl (tdecl, 0);
2861 /* Record one of the standard Java types.
2862 * Declare it as having the given NAME.
2863 * If SIZE > 0, it is the size of one of the integral types;
2864 * otherwise it is the negative of the size of one of the other types. */
2867 record_builtin_java_type (const char* name, int size)
2871 type = make_signed_type (size);
2872 else if (size > -32)
2873 { /* "__java_char" or ""__java_boolean". */
2874 type = make_unsigned_type (-size);
2875 /*if (size == -1) TREE_SET_CODE (type, BOOLEAN_TYPE);*/
2878 { /* "__java_float" or ""__java_double". */
2879 type = make_node (REAL_TYPE);
2880 TYPE_PRECISION (type) = - size;
2883 record_builtin_type (RID_MAX, name, type);
2884 decl = TYPE_NAME (type);
2886 /* Suppress generate debug symbol entries for these types,
2887 since for normal C++ they are just clutter.
2888 However, push_lang_context undoes this if extern "Java" is seen. */
2889 DECL_IGNORED_P (decl) = 1;
2891 TYPE_FOR_JAVA (type) = 1;
2895 /* Push a type into the namespace so that the back-ends ignore it. */
2898 record_unknown_type (tree type, const char* name)
2900 tree decl = pushdecl (build_decl (TYPE_DECL, get_identifier (name), type));
2901 /* Make sure the "unknown type" typedecl gets ignored for debug info. */
2902 DECL_IGNORED_P (decl) = 1;
2903 TYPE_DECL_SUPPRESS_DEBUG (decl) = 1;
2904 TYPE_SIZE (type) = TYPE_SIZE (void_type_node);
2905 TYPE_ALIGN (type) = 1;
2906 TYPE_USER_ALIGN (type) = 0;
2907 TYPE_MODE (type) = TYPE_MODE (void_type_node);
2910 /* An string for which we should create an IDENTIFIER_NODE at
2913 typedef struct predefined_identifier
2915 /* The name of the identifier. */
2916 const char *const name;
2917 /* The place where the IDENTIFIER_NODE should be stored. */
2919 /* Nonzero if this is the name of a constructor or destructor. */
2920 const int ctor_or_dtor_p;
2921 } predefined_identifier;
2923 /* Create all the predefined identifiers. */
2926 initialize_predefined_identifiers (void)
2928 const predefined_identifier *pid;
2930 /* A table of identifiers to create at startup. */
2931 static const predefined_identifier predefined_identifiers[] = {
2932 { "C++", &lang_name_cplusplus, 0 },
2933 { "C", &lang_name_c, 0 },
2934 { "Java", &lang_name_java, 0 },
2935 /* Some of these names have a trailing space so that it is
2936 impossible for them to conflict with names written by users. */
2937 { "__ct ", &ctor_identifier, 1 },
2938 { "__base_ctor ", &base_ctor_identifier, 1 },
2939 { "__comp_ctor ", &complete_ctor_identifier, 1 },
2940 { "__dt ", &dtor_identifier, 1 },
2941 { "__comp_dtor ", &complete_dtor_identifier, 1 },
2942 { "__base_dtor ", &base_dtor_identifier, 1 },
2943 { "__deleting_dtor ", &deleting_dtor_identifier, 1 },
2944 { IN_CHARGE_NAME, &in_charge_identifier, 0 },
2945 { "nelts", &nelts_identifier, 0 },
2946 { THIS_NAME, &this_identifier, 0 },
2947 { VTABLE_DELTA_NAME, &delta_identifier, 0 },
2948 { VTABLE_PFN_NAME, &pfn_identifier, 0 },
2949 { "_vptr", &vptr_identifier, 0 },
2950 { "__vtt_parm", &vtt_parm_identifier, 0 },
2951 { "::", &global_scope_name, 0 },
2952 { "std", &std_identifier, 0 },
2956 for (pid = predefined_identifiers; pid->name; ++pid)
2958 *pid->node = get_identifier (pid->name);
2959 if (pid->ctor_or_dtor_p)
2960 IDENTIFIER_CTOR_OR_DTOR_P (*pid->node) = 1;
2964 /* Create the predefined scalar types of C,
2965 and some nodes representing standard constants (0, 1, (void *)0).
2966 Initialize the global binding level.
2967 Make definitions for built-in primitive functions. */
2970 cxx_init_decl_processing (void)
2973 tree void_ftype_ptr;
2975 build_common_tree_nodes (flag_signed_char, false);
2977 /* Create all the identifiers we need. */
2978 initialize_predefined_identifiers ();
2980 /* Create the global variables. */
2981 push_to_top_level ();
2983 current_function_decl = NULL_TREE;
2984 current_binding_level = NULL;
2985 /* Enter the global namespace. */
2986 gcc_assert (global_namespace == NULL_TREE);
2987 global_namespace = build_lang_decl (NAMESPACE_DECL, global_scope_name,
2989 begin_scope (sk_namespace, global_namespace);
2991 current_lang_name = NULL_TREE;
2993 /* Adjust various flags based on command-line settings. */
2994 if (!flag_permissive)
2995 flag_pedantic_errors = 1;
2996 if (!flag_no_inline)
2998 flag_inline_trees = 1;
3001 if (flag_inline_functions)
3002 flag_inline_trees = 2;
3004 /* Force minimum function alignment if using the least significant
3005 bit of function pointers to store the virtual bit. */
3006 if (TARGET_PTRMEMFUNC_VBIT_LOCATION == ptrmemfunc_vbit_in_pfn
3007 && force_align_functions_log < 1)
3008 force_align_functions_log = 1;
3011 current_lang_name = lang_name_c;
3013 error_mark_list = build_tree_list (error_mark_node, error_mark_node);
3014 TREE_TYPE (error_mark_list) = error_mark_node;
3016 /* Create the `std' namespace. */
3017 push_namespace (std_identifier);
3018 std_node = current_namespace;
3021 c_common_nodes_and_builtins ();
3023 java_byte_type_node = record_builtin_java_type ("__java_byte", 8);
3024 java_short_type_node = record_builtin_java_type ("__java_short", 16);
3025 java_int_type_node = record_builtin_java_type ("__java_int", 32);
3026 java_long_type_node = record_builtin_java_type ("__java_long", 64);
3027 java_float_type_node = record_builtin_java_type ("__java_float", -32);
3028 java_double_type_node = record_builtin_java_type ("__java_double", -64);
3029 java_char_type_node = record_builtin_java_type ("__java_char", -16);
3030 java_boolean_type_node = record_builtin_java_type ("__java_boolean", -1);
3032 integer_two_node = build_int_cst (NULL_TREE, 2);
3033 integer_three_node = build_int_cst (NULL_TREE, 3);
3035 record_builtin_type (RID_BOOL, "bool", boolean_type_node);
3036 truthvalue_type_node = boolean_type_node;
3037 truthvalue_false_node = boolean_false_node;
3038 truthvalue_true_node = boolean_true_node;
3040 empty_except_spec = build_tree_list (NULL_TREE, NULL_TREE);
3043 record_builtin_type (RID_MAX, NULL, string_type_node);
3046 delta_type_node = ptrdiff_type_node;
3047 vtable_index_type = ptrdiff_type_node;
3049 vtt_parm_type = build_pointer_type (const_ptr_type_node);
3050 void_ftype = build_function_type (void_type_node, void_list_node);
3051 void_ftype_ptr = build_function_type (void_type_node,
3052 tree_cons (NULL_TREE,
3056 = build_exception_variant (void_ftype_ptr, empty_except_spec);
3058 /* C++ extensions */
3060 unknown_type_node = make_node (UNKNOWN_TYPE);
3061 record_unknown_type (unknown_type_node, "unknown type");
3063 /* Indirecting an UNKNOWN_TYPE node yields an UNKNOWN_TYPE node. */
3064 TREE_TYPE (unknown_type_node) = unknown_type_node;
3066 /* Looking up TYPE_POINTER_TO and TYPE_REFERENCE_TO yield the same
3068 TYPE_POINTER_TO (unknown_type_node) = unknown_type_node;
3069 TYPE_REFERENCE_TO (unknown_type_node) = unknown_type_node;
3072 /* Make sure we get a unique function type, so we can give
3073 its pointer type a name. (This wins for gdb.) */
3074 tree vfunc_type = make_node (FUNCTION_TYPE);
3075 TREE_TYPE (vfunc_type) = integer_type_node;
3076 TYPE_ARG_TYPES (vfunc_type) = NULL_TREE;
3077 layout_type (vfunc_type);
3079 vtable_entry_type = build_pointer_type (vfunc_type);
3081 record_builtin_type (RID_MAX, VTBL_PTR_TYPE, vtable_entry_type);
3084 = build_cplus_array_type (vtable_entry_type, NULL_TREE);
3085 layout_type (vtbl_type_node);
3086 vtbl_type_node = build_qualified_type (vtbl_type_node, TYPE_QUAL_CONST);
3087 record_builtin_type (RID_MAX, NULL, vtbl_type_node);
3088 vtbl_ptr_type_node = build_pointer_type (vtable_entry_type);
3089 layout_type (vtbl_ptr_type_node);
3090 record_builtin_type (RID_MAX, NULL, vtbl_ptr_type_node);
3092 push_namespace (get_identifier ("__cxxabiv1"));
3093 abi_node = current_namespace;
3096 global_type_node = make_node (LANG_TYPE);
3097 record_unknown_type (global_type_node, "global type");
3100 current_lang_name = lang_name_cplusplus;
3104 tree bad_alloc_type_node;
3105 tree bad_alloc_decl;
3106 tree newtype, deltype;
3107 tree ptr_ftype_sizetype;
3109 push_namespace (std_identifier);
3110 bad_alloc_id = get_identifier ("bad_alloc");
3111 bad_alloc_type_node = make_aggr_type (RECORD_TYPE);
3112 TYPE_CONTEXT (bad_alloc_type_node) = current_namespace;
3114 = create_implicit_typedef (bad_alloc_id, bad_alloc_type_node);
3115 DECL_CONTEXT (bad_alloc_decl) = current_namespace;
3116 TYPE_STUB_DECL (bad_alloc_type_node) = bad_alloc_decl;
3120 = build_function_type (ptr_type_node,
3121 tree_cons (NULL_TREE,
3124 newtype = build_exception_variant
3125 (ptr_ftype_sizetype, add_exception_specifier
3126 (NULL_TREE, bad_alloc_type_node, -1));
3127 deltype = build_exception_variant (void_ftype_ptr, empty_except_spec);
3128 push_cp_library_fn (NEW_EXPR, newtype);
3129 push_cp_library_fn (VEC_NEW_EXPR, newtype);
3130 global_delete_fndecl = push_cp_library_fn (DELETE_EXPR, deltype);
3131 push_cp_library_fn (VEC_DELETE_EXPR, deltype);
3135 = build_library_fn_ptr ("__cxa_pure_virtual", void_ftype);
3137 /* Perform other language dependent initializations. */
3138 init_class_processing ();
3139 init_rtti_processing ();
3141 if (flag_exceptions)
3142 init_exception_processing ();
3144 if (! supports_one_only ())
3147 make_fname_decl = cp_make_fname_decl;
3148 start_fname_decls ();
3150 /* Show we use EH for cleanups. */
3151 if (flag_exceptions)
3152 using_eh_for_cleanups ();
3155 /* Generate an initializer for a function naming variable from
3156 NAME. NAME may be NULL, to indicate a dependent name. TYPE_P is
3157 filled in with the type of the init. */
3160 cp_fname_init (const char* name, tree *type_p)
3162 tree domain = NULL_TREE;
3164 tree init = NULL_TREE;
3169 length = strlen (name);
3170 domain = build_index_type (size_int (length));
3171 init = build_string (length + 1, name);
3174 type = build_qualified_type (char_type_node, TYPE_QUAL_CONST);
3175 type = build_cplus_array_type (type, domain);
3180 TREE_TYPE (init) = type;
3182 init = error_mark_node;
3187 /* Create the VAR_DECL for __FUNCTION__ etc. ID is the name to give the
3188 decl, NAME is the initialization string and TYPE_DEP indicates whether
3189 NAME depended on the type of the function. We make use of that to detect
3190 __PRETTY_FUNCTION__ inside a template fn. This is being done
3191 lazily at the point of first use, so we mustn't push the decl now. */
3194 cp_make_fname_decl (tree id, int type_dep)
3196 const char *const name = (type_dep && processing_template_decl
3197 ? NULL : fname_as_string (type_dep));
3199 tree init = cp_fname_init (name, &type);
3200 tree decl = build_decl (VAR_DECL, id, type);
3203 free ((char *) name);
3205 /* As we're using pushdecl_with_scope, we must set the context. */
3206 DECL_CONTEXT (decl) = current_function_decl;
3207 DECL_PRETTY_FUNCTION_P (decl) = type_dep;
3209 TREE_STATIC (decl) = 1;
3210 TREE_READONLY (decl) = 1;
3211 DECL_ARTIFICIAL (decl) = 1;
3212 DECL_INITIAL (decl) = init;
3214 TREE_USED (decl) = 1;
3216 if (current_function_decl)
3218 struct cp_binding_level *b = current_binding_level;
3219 while (b->level_chain->kind != sk_function_parms)
3221 pushdecl_with_scope (decl, b);
3222 cp_finish_decl (decl, init, NULL_TREE, LOOKUP_ONLYCONVERTING);
3225 pushdecl_top_level_and_finish (decl, init);
3230 /* Make a definition for a builtin function named NAME in the current
3231 namespace, whose data type is TYPE and whose context is CONTEXT.
3232 TYPE should be a function type with argument types.
3234 CLASS and CODE tell later passes how to compile calls to this function.
3235 See tree.h for possible values.
3237 If LIBNAME is nonzero, use that for DECL_ASSEMBLER_NAME,
3238 the name to be called if we can't opencode the function.
3239 If ATTRS is nonzero, use that for the function's attribute
3243 builtin_function_1 (const char* name,
3246 enum built_in_function code,
3247 enum built_in_class class,
3248 const char* libname,
3251 tree decl = build_library_fn_1 (get_identifier (name), ERROR_MARK, type);
3252 DECL_BUILT_IN_CLASS (decl) = class;
3253 DECL_FUNCTION_CODE (decl) = code;
3254 DECL_CONTEXT (decl) = context;
3258 /* Since `pushdecl' relies on DECL_ASSEMBLER_NAME instead of DECL_NAME,
3259 we cannot change DECL_ASSEMBLER_NAME until we have installed this
3260 function in the namespace. */
3262 SET_DECL_ASSEMBLER_NAME (decl, get_identifier (libname));
3264 /* Warn if a function in the namespace for users
3265 is used without an occasion to consider it declared. */
3266 if (name[0] != '_' || name[1] != '_')
3267 DECL_ANTICIPATED (decl) = 1;
3269 /* Possibly apply some default attributes to this built-in function. */
3271 decl_attributes (&decl, attrs, ATTR_FLAG_BUILT_IN);
3273 decl_attributes (&decl, NULL_TREE, 0);
3278 /* Entry point for the benefit of c_common_nodes_and_builtins.
3280 Make a definition for a builtin function named NAME and whose data type
3281 is TYPE. TYPE should be a function type with argument types. This
3282 function places the anticipated declaration in the global namespace
3283 and additionally in the std namespace if appropriate.
3285 CLASS and CODE tell later passes how to compile calls to this function.
3286 See tree.h for possible values.
3288 If LIBNAME is nonzero, use that for DECL_ASSEMBLER_NAME,
3289 the name to be called if we can't opencode the function.
3291 If ATTRS is nonzero, use that for the function's attribute
3295 builtin_function (const char* name,
3298 enum built_in_class cl,
3299 const char* libname,
3302 /* All builtins that don't begin with an '_' should additionally
3303 go in the 'std' namespace. */
3306 push_namespace (std_identifier);
3307 builtin_function_1 (name, type, std_node, code, cl, libname, attrs);
3311 return builtin_function_1 (name, type, NULL_TREE, code,
3312 cl, libname, attrs);
3315 /* Generate a FUNCTION_DECL with the typical flags for a runtime library
3316 function. Not called directly. */
3319 build_library_fn_1 (tree name, enum tree_code operator_code, tree type)
3321 tree fn = build_lang_decl (FUNCTION_DECL, name, type);
3322 DECL_EXTERNAL (fn) = 1;
3323 TREE_PUBLIC (fn) = 1;
3324 DECL_ARTIFICIAL (fn) = 1;
3325 TREE_NOTHROW (fn) = 1;
3326 SET_OVERLOADED_OPERATOR_CODE (fn, operator_code);
3327 SET_DECL_LANGUAGE (fn, lang_c);
3328 /* Runtime library routines are, by definition, available in an
3329 external shared object. */
3330 DECL_VISIBILITY (fn) = VISIBILITY_DEFAULT;
3331 DECL_VISIBILITY_SPECIFIED (fn) = 1;
3335 /* Returns the _DECL for a library function with C linkage.
3336 We assume that such functions never throw; if this is incorrect,
3337 callers should unset TREE_NOTHROW. */
3340 build_library_fn (tree name, tree type)
3342 return build_library_fn_1 (name, ERROR_MARK, type);
3345 /* Returns the _DECL for a library function with C++ linkage. */
3348 build_cp_library_fn (tree name, enum tree_code operator_code, tree type)
3350 tree fn = build_library_fn_1 (name, operator_code, type);
3351 TREE_NOTHROW (fn) = TYPE_NOTHROW_P (type);
3352 DECL_CONTEXT (fn) = FROB_CONTEXT (current_namespace);
3353 SET_DECL_LANGUAGE (fn, lang_cplusplus);
3357 /* Like build_library_fn, but takes a C string instead of an
3361 build_library_fn_ptr (const char* name, tree type)
3363 return build_library_fn (get_identifier (name), type);
3366 /* Like build_cp_library_fn, but takes a C string instead of an
3370 build_cp_library_fn_ptr (const char* name, tree type)
3372 return build_cp_library_fn (get_identifier (name), ERROR_MARK, type);
3375 /* Like build_library_fn, but also pushes the function so that we will
3376 be able to find it via IDENTIFIER_GLOBAL_VALUE. */
3379 push_library_fn (tree name, tree type)
3381 tree fn = build_library_fn (name, type);
3382 pushdecl_top_level (fn);
3386 /* Like build_cp_library_fn, but also pushes the function so that it
3387 will be found by normal lookup. */
3390 push_cp_library_fn (enum tree_code operator_code, tree type)
3392 tree fn = build_cp_library_fn (ansi_opname (operator_code),
3399 /* Like push_library_fn, but takes a TREE_LIST of parm types rather than
3403 push_void_library_fn (tree name, tree parmtypes)
3405 tree type = build_function_type (void_type_node, parmtypes);
3406 return push_library_fn (name, type);
3409 /* Like push_library_fn, but also note that this function throws
3410 and does not return. Used for __throw_foo and the like. */
3413 push_throw_library_fn (tree name, tree type)
3415 tree fn = push_library_fn (name, type);
3416 TREE_THIS_VOLATILE (fn) = 1;
3417 TREE_NOTHROW (fn) = 0;
3421 /* When we call finish_struct for an anonymous union, we create
3422 default copy constructors and such. But, an anonymous union
3423 shouldn't have such things; this function undoes the damage to the
3424 anonymous union type T.
3426 (The reason that we create the synthesized methods is that we don't
3427 distinguish `union { int i; }' from `typedef union { int i; } U'.
3428 The first is an anonymous union; the second is just an ordinary
3432 fixup_anonymous_aggr (tree t)
3436 /* Wipe out memory of synthesized methods. */
3437 TYPE_HAS_CONSTRUCTOR (t) = 0;
3438 TYPE_HAS_DEFAULT_CONSTRUCTOR (t) = 0;
3439 TYPE_HAS_INIT_REF (t) = 0;
3440 TYPE_HAS_CONST_INIT_REF (t) = 0;
3441 TYPE_HAS_ASSIGN_REF (t) = 0;
3442 TYPE_HAS_CONST_ASSIGN_REF (t) = 0;
3444 /* Splice the implicitly generated functions out of the TYPE_METHODS
3446 q = &TYPE_METHODS (t);
3449 if (DECL_ARTIFICIAL (*q))
3450 *q = TREE_CHAIN (*q);
3452 q = &TREE_CHAIN (*q);
3455 /* ISO C++ 9.5.3. Anonymous unions may not have function members. */
3456 if (TYPE_METHODS (t))
3457 error ("%Jan anonymous union cannot have function members",
3458 TYPE_MAIN_DECL (t));
3460 /* Anonymous aggregates cannot have fields with ctors, dtors or complex
3461 assignment operators (because they cannot have these methods themselves).
3462 For anonymous unions this is already checked because they are not allowed
3463 in any union, otherwise we have to check it. */
3464 if (TREE_CODE (t) != UNION_TYPE)
3468 for (field = TYPE_FIELDS (t); field; field = TREE_CHAIN (field))
3469 if (TREE_CODE (field) == FIELD_DECL)
3471 type = TREE_TYPE (field);
3472 if (CLASS_TYPE_P (type))
3474 if (TYPE_NEEDS_CONSTRUCTING (type))
3475 cp_error_at ("member %q#D with constructor not allowed "
3476 "in anonymous aggregate",
3478 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type))
3479 cp_error_at ("member %q#D with destructor not allowed "
3480 "in anonymous aggregate",
3482 if (TYPE_HAS_COMPLEX_ASSIGN_REF (type))
3483 cp_error_at ("member %q#D with copy assignment operator "
3484 "not allowed in anonymous aggregate",
3491 /* Make sure that a declaration with no declarator is well-formed, i.e.
3492 just declares a tagged type or anonymous union.
3494 Returns the type declared; or NULL_TREE if none. */
3497 check_tag_decl (cp_decl_specifier_seq *declspecs)
3499 int saw_friend = declspecs->specs[(int)ds_friend] != 0;
3500 int saw_typedef = declspecs->specs[(int)ds_typedef] != 0;
3501 /* If a class, struct, or enum type is declared by the DECLSPECS
3502 (i.e, if a class-specifier, enum-specifier, or non-typename
3503 elaborated-type-specifier appears in the DECLSPECS),
3504 DECLARED_TYPE is set to the corresponding type. */
3505 tree declared_type = NULL_TREE;
3506 bool error_p = false;
3508 if (declspecs->multiple_types_p)
3509 error ("multiple types in one declaration");
3510 else if (declspecs->redefined_builtin_type)
3512 if (!in_system_header)
3513 pedwarn ("redeclaration of C++ built-in type %qT",
3514 declspecs->redefined_builtin_type);
3518 if (TYPE_P (declspecs->type)
3519 && ((TREE_CODE (declspecs->type) != TYPENAME_TYPE
3520 && IS_AGGR_TYPE (declspecs->type))
3521 || TREE_CODE (declspecs->type) == ENUMERAL_TYPE))
3522 declared_type = declspecs->type;
3523 else if (declspecs->type == error_mark_node)
3525 if (declared_type == NULL_TREE && ! saw_friend && !error_p)
3526 pedwarn ("declaration does not declare anything");
3527 /* Check for an anonymous union. */
3528 else if (declared_type && IS_AGGR_TYPE_CODE (TREE_CODE (declared_type))
3529 && TYPE_ANONYMOUS_P (declared_type))
3531 /* 7/3 In a simple-declaration, the optional init-declarator-list
3532 can be omitted only when declaring a class (clause 9) or
3533 enumeration (7.2), that is, when the decl-specifier-seq contains
3534 either a class-specifier, an elaborated-type-specifier with
3535 a class-key (9.1), or an enum-specifier. In these cases and
3536 whenever a class-specifier or enum-specifier is present in the
3537 decl-specifier-seq, the identifiers in these specifiers are among
3538 the names being declared by the declaration (as class-name,
3539 enum-names, or enumerators, depending on the syntax). In such
3540 cases, and except for the declaration of an unnamed bit-field (9.6),
3541 the decl-specifier-seq shall introduce one or more names into the
3542 program, or shall redeclare a name introduced by a previous
3543 declaration. [Example:
3544 enum { }; // ill-formed
3545 typedef class { }; // ill-formed
3549 error ("missing type-name in typedef-declaration");
3552 /* Anonymous unions are objects, so they can have specifiers. */;
3553 SET_ANON_AGGR_TYPE_P (declared_type);
3555 if (TREE_CODE (declared_type) != UNION_TYPE && pedantic
3556 && !in_system_header)
3557 pedwarn ("ISO C++ prohibits anonymous structs");
3562 if (declspecs->specs[(int)ds_inline]
3563 || declspecs->specs[(int)ds_virtual])
3564 error ("%qs can only be specified for functions",
3565 declspecs->specs[(int)ds_inline]
3566 ? "inline" : "virtual");
3568 && (!current_class_type
3569 || current_scope () != current_class_type))
3570 error ("%<friend%> can only be specified inside a class");
3571 else if (declspecs->specs[(int)ds_explicit])
3572 error ("%<explicit%> can only be specified for constructors");
3573 else if (declspecs->storage_class)
3574 error ("a storage class can only be specified for objects "
3576 else if (declspecs->specs[(int)ds_const]
3577 || declspecs->specs[(int)ds_volatile]
3578 || declspecs->specs[(int)ds_restrict]
3579 || declspecs->specs[(int)ds_thread])
3580 error ("qualifiers can only be specified for objects "
3584 return declared_type;
3587 /* Called when a declaration is seen that contains no names to declare.
3588 If its type is a reference to a structure, union or enum inherited
3589 from a containing scope, shadow that tag name for the current scope
3590 with a forward reference.
3591 If its type defines a new named structure or union
3592 or defines an enum, it is valid but we need not do anything here.
3593 Otherwise, it is an error.
3595 C++: may have to grok the declspecs to learn about static,
3596 complain for anonymous unions.
3598 Returns the TYPE declared -- or NULL_TREE if none. */
3601 shadow_tag (cp_decl_specifier_seq *declspecs)
3603 tree t = check_tag_decl (declspecs);
3608 if (declspecs->attributes)
3610 cp_warning_at ("attribute ignored in declaration of %q#T", t);
3611 cp_warning_at ("attribute for %q#T must follow the %qs keyword",
3613 class_key_or_enum_as_string (t));
3617 maybe_process_partial_specialization (t);
3619 /* This is where the variables in an anonymous union are
3620 declared. An anonymous union declaration looks like:
3622 because there is no declarator after the union, the parser
3623 sends that declaration here. */
3624 if (ANON_AGGR_TYPE_P (t))
3626 fixup_anonymous_aggr (t);
3628 if (TYPE_FIELDS (t))
3630 tree decl = grokdeclarator (/*declarator=*/NULL,
3631 declspecs, NORMAL, 0, NULL);
3632 finish_anon_union (decl);
3639 /* Decode a "typename", such as "int **", returning a ..._TYPE node. */
3642 groktypename (cp_decl_specifier_seq *type_specifiers,
3643 const cp_declarator *declarator)
3647 attrs = type_specifiers->attributes;
3648 type_specifiers->attributes = NULL_TREE;
3649 type = grokdeclarator (declarator, type_specifiers, TYPENAME, 0, &attrs);
3651 cplus_decl_attributes (&type, attrs, 0);
3655 /* Decode a declarator in an ordinary declaration or data definition.
3656 This is called as soon as the type information and variable name
3657 have been parsed, before parsing the initializer if any.
3658 Here we create the ..._DECL node, fill in its type,
3659 and put it on the list of decls for the current context.
3660 The ..._DECL node is returned as the value.
3662 Exception: for arrays where the length is not specified,
3663 the type is left null, to be filled in by `cp_finish_decl'.
3665 Function definitions do not come here; they go to start_function
3666 instead. However, external and forward declarations of functions
3667 do go through here. Structure field declarations are done by
3668 grokfield and not through here. */
3671 start_decl (const cp_declarator *declarator,
3672 cp_decl_specifier_seq *declspecs,
3675 tree prefix_attributes,
3682 *pop_scope_p = false;
3684 /* This should only be done once on the top most decl. */
3685 if (have_extern_spec)
3687 declspecs->storage_class = sc_extern;
3688 have_extern_spec = false;
3691 /* An object declared as __attribute__((deprecated)) suppresses
3692 warnings of uses of other deprecated items. */
3693 if (lookup_attribute ("deprecated", attributes))
3694 deprecated_state = DEPRECATED_SUPPRESS;
3696 attributes = chainon (attributes, prefix_attributes);
3698 decl = grokdeclarator (declarator, declspecs, NORMAL, initialized,
3701 deprecated_state = DEPRECATED_NORMAL;
3703 if (decl == NULL_TREE || TREE_CODE (decl) == VOID_TYPE)
3704 return error_mark_node;
3706 type = TREE_TYPE (decl);
3708 if (type == error_mark_node)
3709 return error_mark_node;
3711 context = DECL_CONTEXT (decl);
3714 *pop_scope_p = push_scope (context);
3716 /* We are only interested in class contexts, later. */
3717 if (context && TREE_CODE (context) == NAMESPACE_DECL)
3718 context = NULL_TREE;
3721 /* Is it valid for this decl to have an initializer at all?
3722 If not, set INITIALIZED to zero, which will indirectly
3723 tell `cp_finish_decl' to ignore the initializer once it is parsed. */
3724 switch (TREE_CODE (decl))
3727 error ("typedef %qD is initialized (use __typeof__ instead)", decl);
3732 error ("function %q#D is initialized like a variable", decl);
3742 if (! toplevel_bindings_p ()
3743 && DECL_EXTERNAL (decl))
3744 warning ("declaration of %q#D has %<extern%> and is initialized",
3746 DECL_EXTERNAL (decl) = 0;
3747 if (toplevel_bindings_p ())
3748 TREE_STATIC (decl) = 1;
3750 /* Tell `pushdecl' this is an initialized decl
3751 even though we don't yet have the initializer expression.
3752 Also tell `cp_finish_decl' it may store the real initializer. */
3753 DECL_INITIAL (decl) = error_mark_node;
3756 /* Set attributes here so if duplicate decl, will have proper attributes. */
3757 cplus_decl_attributes (&decl, attributes, 0);
3759 /* If #pragma weak was used, mark the decl weak now. */
3760 if (global_scope_p (current_binding_level))
3761 maybe_apply_pragma_weak (decl);
3763 if (TREE_CODE (decl) == FUNCTION_DECL
3764 && DECL_DECLARED_INLINE_P (decl)
3765 && DECL_UNINLINABLE (decl)
3766 && lookup_attribute ("noinline", DECL_ATTRIBUTES (decl)))
3767 warning ("%Jinline function %qD given attribute noinline", decl, decl);
3769 if (context && COMPLETE_TYPE_P (complete_type (context)))
3771 if (TREE_CODE (decl) == VAR_DECL)
3773 tree field = lookup_field (context, DECL_NAME (decl), 0, false);
3774 if (field == NULL_TREE || TREE_CODE (field) != VAR_DECL)
3775 error ("%q#D is not a static member of %q#T", decl, context);
3778 if (DECL_CONTEXT (field) != context)
3780 if (!same_type_p (DECL_CONTEXT (field), context))
3781 pedwarn ("ISO C++ does not permit %<%T::%D%> "
3782 "to be defined as %<%T::%D%>",
3783 DECL_CONTEXT (field), DECL_NAME (decl),
3784 context, DECL_NAME (decl));
3785 DECL_CONTEXT (decl) = DECL_CONTEXT (field);
3787 if (processing_specialization
3788 && template_class_depth (context) == 0
3789 && CLASSTYPE_TEMPLATE_SPECIALIZATION (context))
3790 error ("template header not allowed in member definition "
3791 "of explicitly specialized class");
3792 /* Static data member are tricky; an in-class initialization
3793 still doesn't provide a definition, so the in-class
3794 declaration will have DECL_EXTERNAL set, but will have an
3795 initialization. Thus, duplicate_decls won't warn
3796 about this situation, and so we check here. */
3797 if (DECL_INITIAL (decl) && DECL_INITIAL (field))
3798 error ("duplicate initialization of %qD", decl);
3799 if (duplicate_decls (decl, field))
3805 tree field = check_classfn (context, decl,
3806 (processing_template_decl
3807 > template_class_depth (context))
3808 ? current_template_parms
3810 if (field && duplicate_decls (decl, field))
3814 /* cp_finish_decl sets DECL_EXTERNAL if DECL_IN_AGGR_P is set. */
3815 DECL_IN_AGGR_P (decl) = 0;
3816 if ((DECL_LANG_SPECIFIC (decl) && DECL_USE_TEMPLATE (decl))
3817 || CLASSTYPE_TEMPLATE_INSTANTIATION (context))
3819 SET_DECL_TEMPLATE_SPECIALIZATION (decl);
3820 /* [temp.expl.spec] An explicit specialization of a static data
3821 member of a template is a definition if the declaration
3822 includes an initializer; otherwise, it is a declaration.
3824 We check for processing_specialization so this only applies
3825 to the new specialization syntax. */
3826 if (DECL_INITIAL (decl) == NULL_TREE && processing_specialization)
3827 DECL_EXTERNAL (decl) = 1;
3830 if (DECL_EXTERNAL (decl) && ! DECL_TEMPLATE_SPECIALIZATION (decl))
3831 pedwarn ("declaration of %q#D outside of class is not definition",
3835 /* Enter this declaration into the symbol table. */
3836 tem = maybe_push_decl (decl);
3838 if (processing_template_decl)
3839 tem = push_template_decl (tem);
3840 if (tem == error_mark_node)
3841 return error_mark_node;
3843 #if ! defined (ASM_OUTPUT_BSS) && ! defined (ASM_OUTPUT_ALIGNED_BSS)
3844 /* Tell the back-end to use or not use .common as appropriate. If we say
3845 -fconserve-space, we want this to save .data space, at the expense of
3846 wrong semantics. If we say -fno-conserve-space, we want this to
3847 produce errors about redefs; to do this we force variables into the
3849 DECL_COMMON (tem) = ((TREE_CODE (tem) != VAR_DECL
3850 || !DECL_THREAD_LOCAL (tem))
3851 && (flag_conserve_space || ! TREE_PUBLIC (tem)));
3854 if (! processing_template_decl)
3861 start_decl_1 (tree decl)
3863 tree type = TREE_TYPE (decl);
3864 int initialized = (DECL_INITIAL (decl) != NULL_TREE);
3866 if (type == error_mark_node)
3870 /* Is it valid for this decl to have an initializer at all?
3871 If not, set INITIALIZED to zero, which will indirectly
3872 tell `cp_finish_decl' to ignore the initializer once it is parsed. */
3874 /* Don't allow initializations for incomplete types except for
3875 arrays which might be completed by the initialization. */
3876 if (COMPLETE_TYPE_P (complete_type (type)))
3877 ; /* A complete type is ok. */
3878 else if (TREE_CODE (type) != ARRAY_TYPE)
3880 error ("variable %q#D has initializer but incomplete type", decl);
3882 type = TREE_TYPE (decl) = error_mark_node;
3884 else if (!COMPLETE_TYPE_P (complete_type (TREE_TYPE (type))))
3886 if (DECL_LANG_SPECIFIC (decl) && DECL_TEMPLATE_INFO (decl))
3887 error ("elements of array %q#D have incomplete type", decl);
3888 /* else we already gave an error in start_decl. */
3894 && TREE_CODE (decl) != TYPE_DECL
3895 && TREE_CODE (decl) != TEMPLATE_DECL
3896 && type != error_mark_node
3897 && IS_AGGR_TYPE (type)
3898 && ! DECL_EXTERNAL (decl))
3900 if ((! processing_template_decl || ! uses_template_parms (type))
3901 && !COMPLETE_TYPE_P (complete_type (type)))
3903 error ("aggregate %q#D has incomplete type and cannot be defined",
3905 /* Change the type so that assemble_variable will give
3906 DECL an rtl we can live with: (mem (const_int 0)). */
3907 type = TREE_TYPE (decl) = error_mark_node;
3911 /* If any base type in the hierarchy of TYPE needs a constructor,
3912 then we set initialized to 1. This way any nodes which are
3913 created for the purposes of initializing this aggregate
3914 will live as long as it does. This is necessary for global
3915 aggregates which do not have their initializers processed until
3916 the end of the file. */
3917 initialized = TYPE_NEEDS_CONSTRUCTING (type);
3922 DECL_INITIAL (decl) = NULL_TREE;
3924 /* Create a new scope to hold this declaration if necessary.
3925 Whether or not a new scope is necessary cannot be determined
3926 until after the type has been completed; if the type is a
3927 specialization of a class template it is not until after
3928 instantiation has occurred that TYPE_HAS_NONTRIVIAL_DESTRUCTOR
3929 will be set correctly. */
3930 maybe_push_cleanup_level (type);
3933 /* Handle initialization of references. DECL, TYPE, and INIT have the
3934 same meaning as in cp_finish_decl. *CLEANUP must be NULL on entry,
3935 but will be set to a new CLEANUP_STMT if a temporary is created
3936 that must be destroyed subsequently.
3938 Returns an initializer expression to use to initialize DECL, or
3939 NULL if the initialization can be performed statically.
3941 Quotes on semantics can be found in ARM 8.4.3. */
3944 grok_reference_init (tree decl, tree type, tree init, tree *cleanup)
3948 if (init == NULL_TREE)
3950 if ((DECL_LANG_SPECIFIC (decl) == 0
3951 || DECL_IN_AGGR_P (decl) == 0)
3952 && ! DECL_THIS_EXTERN (decl))
3953 error ("%qD declared as reference but not initialized", decl);
3957 if (TREE_CODE (init) == CONSTRUCTOR)
3959 error ("ISO C++ forbids use of initializer list to "
3960 "initialize reference %qD", decl);
3964 if (TREE_CODE (init) == TREE_LIST)
3965 init = build_x_compound_expr_from_list (init, "initializer");
3967 if (TREE_CODE (TREE_TYPE (type)) != ARRAY_TYPE
3968 && TREE_CODE (TREE_TYPE (init)) == ARRAY_TYPE)
3969 /* Note: default conversion is only called in very special cases. */
3970 init = decay_conversion (init);
3972 /* Convert INIT to the reference type TYPE. This may involve the
3973 creation of a temporary, whose lifetime must be the same as that
3974 of the reference. If so, a DECL_EXPR for the temporary will be
3975 added just after the DECL_EXPR for DECL. That's why we don't set
3976 DECL_INITIAL for local references (instead assigning to them
3977 explicitly); we need to allow the temporary to be initialized
3979 tmp = initialize_reference (type, init, decl, cleanup);
3981 if (tmp == error_mark_node)
3983 else if (tmp == NULL_TREE)
3985 error ("cannot initialize %qT from %qT", type, TREE_TYPE (init));
3989 if (TREE_STATIC (decl) && !TREE_CONSTANT (tmp))
3992 DECL_INITIAL (decl) = tmp;
3997 /* When parsing `int a[] = {1, 2};' we don't know the size of the
3998 array until we finish parsing the initializer. If that's the
3999 situation we're in, update DECL accordingly. */
4002 maybe_deduce_size_from_array_init (tree decl, tree init)
4004 tree type = TREE_TYPE (decl);
4006 if (TREE_CODE (type) == ARRAY_TYPE
4007 && TYPE_DOMAIN (type) == NULL_TREE
4008 && TREE_CODE (decl) != TYPE_DECL)
4010 /* do_default is really a C-ism to deal with tentative definitions.
4011 But let's leave it here to ease the eventual merge. */
4012 int do_default = !DECL_EXTERNAL (decl);
4013 tree initializer = init ? init : DECL_INITIAL (decl);
4014 int failure = complete_array_type (type, initializer, do_default);
4017 error ("initializer fails to determine size of %qD", decl);
4022 error ("array size missing in %qD", decl);
4023 /* If a `static' var's size isn't known, make it extern as
4024 well as static, so it does not get allocated. If it's not
4025 `static', then don't mark it extern; finish_incomplete_decl
4026 will give it a default size and it will get allocated. */
4027 else if (!pedantic && TREE_STATIC (decl) && !TREE_PUBLIC (decl))
4028 DECL_EXTERNAL (decl) = 1;
4031 if (pedantic && TYPE_DOMAIN (type) != NULL_TREE
4032 && tree_int_cst_lt (TYPE_MAX_VALUE (TYPE_DOMAIN (type)),
4034 error ("zero-size array %qD", decl);
4036 layout_decl (decl, 0);
4040 /* Set DECL_SIZE, DECL_ALIGN, etc. for DECL (a VAR_DECL), and issue
4041 any appropriate error messages regarding the layout. */
4044 layout_var_decl (tree decl)
4046 tree type = TREE_TYPE (decl);
4048 tree ttype = target_type (type);
4051 /* If we haven't already layed out this declaration, do so now.
4052 Note that we must not call complete type for an external object
4053 because it's type might involve templates that we are not
4054 supposed to instantiate yet. (And it's perfectly valid to say
4055 `extern X x' for some incomplete type `X'.) */
4056 if (!DECL_EXTERNAL (decl))
4057 complete_type (type);
4058 if (!DECL_SIZE (decl)
4059 && TREE_TYPE (decl) != error_mark_node
4060 && (COMPLETE_TYPE_P (type)
4061 || (TREE_CODE (type) == ARRAY_TYPE
4062 && !TYPE_DOMAIN (type)
4063 && COMPLETE_TYPE_P (TREE_TYPE (type)))))
4064 layout_decl (decl, 0);
4066 if (!DECL_EXTERNAL (decl) && DECL_SIZE (decl) == NULL_TREE)
4068 /* An automatic variable with an incomplete type: that is an error.
4069 Don't talk about array types here, since we took care of that
4070 message in grokdeclarator. */
4071 error ("storage size of %qD isn't known", decl);
4072 TREE_TYPE (decl) = error_mark_node;
4075 /* Keep this code around in case we later want to control debug info
4076 based on whether a type is "used". (jason 1999-11-11) */
4078 else if (!DECL_EXTERNAL (decl) && IS_AGGR_TYPE (ttype))
4079 /* Let debugger know it should output info for this type. */
4080 note_debug_info_needed (ttype);
4082 if (TREE_STATIC (decl) && DECL_CLASS_SCOPE_P (decl))
4083 note_debug_info_needed (DECL_CONTEXT (decl));
4086 if ((DECL_EXTERNAL (decl) || TREE_STATIC (decl))
4087 && DECL_SIZE (decl) != NULL_TREE
4088 && ! TREE_CONSTANT (DECL_SIZE (decl)))
4090 if (TREE_CODE (DECL_SIZE (decl)) == INTEGER_CST)
4091 constant_expression_warning (DECL_SIZE (decl));
4093 error ("storage size of %qD isn't constant", decl);
4096 if (TREE_STATIC (decl)
4097 && !DECL_ARTIFICIAL (decl)
4098 && current_function_decl
4099 && DECL_CONTEXT (decl) == current_function_decl)
4100 push_local_name (decl);
4103 /* If a local static variable is declared in an inline function, or if
4104 we have a weak definition, we must endeavor to create only one
4105 instance of the variable at link-time. */
4108 maybe_commonize_var (tree decl)
4110 /* Static data in a function with comdat linkage also has comdat
4112 if (TREE_STATIC (decl)
4113 /* Don't mess with __FUNCTION__. */
4114 && ! DECL_ARTIFICIAL (decl)
4115 && DECL_FUNCTION_SCOPE_P (decl)
4116 /* Unfortunately, import_export_decl has not always been called
4117 before the function is processed, so we cannot simply check
4119 && (DECL_COMDAT (DECL_CONTEXT (decl))
4120 || ((DECL_DECLARED_INLINE_P (DECL_CONTEXT (decl))
4121 || DECL_TEMPLATE_INSTANTIATION (DECL_CONTEXT (decl)))
4122 && TREE_PUBLIC (DECL_CONTEXT (decl)))))
4126 /* With weak symbols, we simply make the variable COMDAT;
4127 that will cause copies in multiple translations units to
4129 comdat_linkage (decl);
4133 if (DECL_INITIAL (decl) == NULL_TREE
4134 || DECL_INITIAL (decl) == error_mark_node)
4136 /* Without weak symbols, we can use COMMON to merge
4137 uninitialized variables. */
4138 TREE_PUBLIC (decl) = 1;
4139 DECL_COMMON (decl) = 1;
4143 /* While for initialized variables, we must use internal
4144 linkage -- which means that multiple copies will not
4146 TREE_PUBLIC (decl) = 0;
4147 DECL_COMMON (decl) = 0;
4148 cp_warning_at ("sorry: semantics of inline function static "
4149 "data %q#D are wrong (you'll wind up "
4150 "with multiple copies)", decl);
4151 warning ("%J you can work around this by removing "
4157 else if (DECL_LANG_SPECIFIC (decl) && DECL_COMDAT (decl))
4158 /* Set it up again; we might have set DECL_INITIAL since the last
4160 comdat_linkage (decl);
4163 /* Issue an error message if DECL is an uninitialized const variable. */
4166 check_for_uninitialized_const_var (tree decl)
4168 tree type = TREE_TYPE (decl);
4170 /* ``Unless explicitly declared extern, a const object does not have
4171 external linkage and must be initialized. ($8.4; $12.1)'' ARM
4173 if (TREE_CODE (decl) == VAR_DECL
4174 && TREE_CODE (type) != REFERENCE_TYPE
4175 && CP_TYPE_CONST_P (type)
4176 && !TYPE_NEEDS_CONSTRUCTING (type)
4177 && !DECL_INITIAL (decl))
4178 error ("uninitialized const %qD", decl);
4181 /* FIELD is a FIELD_DECL or NULL. In the former case, the value
4182 returned is the next FIELD_DECL (possibly FIELD itself) that can be
4183 initialized. If there are no more such fields, the return value
4187 next_initializable_field (tree field)
4190 && (TREE_CODE (field) != FIELD_DECL
4191 || (DECL_C_BIT_FIELD (field) && !DECL_NAME (field))
4192 || DECL_ARTIFICIAL (field)))
4193 field = TREE_CHAIN (field);
4198 /* Subroutine of reshape_init. Reshape the constructor for an array. INITP
4199 is the pointer to the old constructor list (to the CONSTRUCTOR_ELTS of
4200 the CONSTRUCTOR we are processing), while NEW_INIT is the CONSTRUCTOR we
4202 ELT_TYPE is the element type of the array. MAX_INDEX is an INTEGER_CST
4203 representing the size of the array minus one (the maximum index), or
4204 NULL_TREE if the array was declared without specifying the size. */
4207 reshape_init_array (tree elt_type, tree max_index,
4208 tree *initp, tree new_init)
4210 bool sized_array_p = (max_index != NULL_TREE);
4211 HOST_WIDE_INT max_index_cst = 0;
4212 HOST_WIDE_INT index;
4215 /* HWI is either 32bit or 64bit, so it must be enough to represent the
4217 max_index_cst = tree_low_cst (max_index, 1);
4219 /* Loop until there are no more initializers. */
4221 *initp && (!sized_array_p || index <= max_index_cst);
4225 tree designated_index;
4227 element_init = reshape_init (elt_type, initp);
4228 if (element_init == error_mark_node)
4230 TREE_CHAIN (element_init) = CONSTRUCTOR_ELTS (new_init);
4231 CONSTRUCTOR_ELTS (new_init) = element_init;
4232 designated_index = TREE_PURPOSE (element_init);
4233 if (designated_index)
4235 /* Handle array designated initializers (GNU extension). */
4236 if (TREE_CODE (designated_index) == IDENTIFIER_NODE)
4238 error ("name %qD used in a GNU-style designated "
4239 "initializer for an array", designated_index);
4240 TREE_PURPOSE (element_init) = NULL_TREE;
4244 gcc_assert (TREE_CODE (designated_index) == INTEGER_CST);
4246 && tree_int_cst_lt (max_index, designated_index))
4248 error ("Designated initializer %qE larger than array "
4249 "size", designated_index);
4250 TREE_PURPOSE (element_init) = NULL_TREE;
4253 index = tree_low_cst (designated_index, 1);
4261 /* Undo the brace-elision allowed by [dcl.init.aggr] in a
4262 brace-enclosed aggregate initializer.
4264 *INITP is one of a list of initializers describing a brace-enclosed
4265 initializer for an entity of the indicated aggregate TYPE. It may
4266 not presently match the shape of the TYPE; for example:
4268 struct S { int a; int b; };
4269 struct S a[] = { 1, 2, 3, 4 };
4271 Here *INITP will point to TREE_LIST of four elements, rather than a
4272 list of two elements, each itself a list of two elements. This
4273 routine transforms INIT from the former form into the latter. The
4274 revised initializer is returned. */
4277 reshape_init (tree type, tree *initp)
4281 tree old_init_value;
4283 bool brace_enclosed_p;
4286 old_init_value = (TREE_CODE (*initp) == TREE_LIST
4287 ? TREE_VALUE (*initp) : old_init);
4289 gcc_assert (old_init_value);
4291 /* If the initializer is brace-enclosed, pull initializers from the
4292 enclosed elements. Advance past the brace-enclosed initializer
4294 if (TREE_CODE (old_init_value) == CONSTRUCTOR
4295 && BRACE_ENCLOSED_INITIALIZER_P (old_init_value))
4297 *initp = TREE_CHAIN (old_init);
4298 TREE_CHAIN (old_init) = NULL_TREE;
4299 inits = CONSTRUCTOR_ELTS (old_init_value);
4301 brace_enclosed_p = true;
4306 brace_enclosed_p = false;
4309 /* A non-aggregate type is always initialized with a single
4311 if (!CP_AGGREGATE_TYPE_P (type))
4313 *initp = TREE_CHAIN (old_init);
4314 TREE_CHAIN (old_init) = NULL_TREE;
4315 /* It is invalid to initialize a non-aggregate type with a
4316 brace-enclosed initializer. */
4317 if (brace_enclosed_p)
4319 error ("brace-enclosed initializer used to initialize %qT",
4321 if (TREE_CODE (old_init) == TREE_LIST)
4322 TREE_VALUE (old_init) = error_mark_node;
4324 old_init = error_mark_node;
4332 All implicit type conversions (clause _conv_) are considered when
4333 initializing the aggregate member with an initializer from an
4334 initializer-list. If the initializer can initialize a member,
4335 the member is initialized. Otherwise, if the member is itself a
4336 non-empty subaggregate, brace elision is assumed and the
4337 initializer is considered for the initialization of the first
4338 member of the subaggregate. */
4339 if (!brace_enclosed_p
4340 && can_convert_arg (type, TREE_TYPE (old_init_value), old_init_value))
4342 *initp = TREE_CHAIN (old_init);
4343 TREE_CHAIN (old_init) = NULL_TREE;
4347 if (TREE_CODE (old_init_value) == STRING_CST
4348 && TREE_CODE (type) == ARRAY_TYPE
4349 && char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (type))))
4351 /* [dcl.init.string]
4353 A char array (whether plain char, signed char, or unsigned char)
4354 can be initialized by a string-literal (optionally enclosed in
4355 braces); a wchar_t array can be initialized by a wide
4356 string-literal (optionally enclosed in braces). */
4357 new_init = old_init;
4358 /* Move past the initializer. */
4359 *initp = TREE_CHAIN (old_init);
4360 TREE_CHAIN (old_init) = NULL_TREE;
4364 /* Build a CONSTRUCTOR to hold the contents of the aggregate. */
4365 new_init = build_constructor (NULL_TREE, NULL_TREE);
4367 if (CLASS_TYPE_P (type))
4371 field = next_initializable_field (TYPE_FIELDS (type));
4377 An initializer for an aggregate member that is an
4378 empty class shall have the form of an empty
4379 initializer-list {}. */
4380 if (!brace_enclosed_p)
4382 error ("initializer for %qT must be brace-enclosed", type);
4383 return error_mark_node;
4388 /* Loop through the initializable fields, gathering
4394 /* Handle designated initializers, as an extension. */
4395 if (TREE_PURPOSE (*initp))
4398 pedwarn ("ISO C++ does not allow designated initializers");
4399 field = lookup_field_1 (type, TREE_PURPOSE (*initp),
4400 /*want_type=*/false);
4401 if (!field || TREE_CODE (field) != FIELD_DECL)
4402 error ("%qT has no non-static data member named %qD",
4403 type, TREE_PURPOSE (*initp));
4408 field_init = reshape_init (TREE_TYPE (field), initp);
4409 if (field_init == error_mark_node)
4410 return error_mark_node;
4411 TREE_CHAIN (field_init) = CONSTRUCTOR_ELTS (new_init);
4412 CONSTRUCTOR_ELTS (new_init) = field_init;
4415 When a union is initialized with a brace-enclosed
4416 initializer, the braces shall only contain an
4417 initializer for the first member of the union. */
4418 if (TREE_CODE (type) == UNION_TYPE)
4420 field = next_initializable_field (TREE_CHAIN (field));
4424 else if (TREE_CODE (type) == ARRAY_TYPE
4425 || TREE_CODE (type) == VECTOR_TYPE)
4427 /* If the bound of the array is known, take no more initializers
4428 than are allowed. */
4429 tree max_index = NULL_TREE;
4430 if (TREE_CODE (type) == ARRAY_TYPE)
4432 if (TYPE_DOMAIN (type))
4433 max_index = array_type_nelts (type);
4437 /* For a vector, the representation type is a struct
4438 containing a single member which is an array of the
4439 appropriate size. */
4440 tree rtype = TYPE_DEBUG_REPRESENTATION_TYPE (type);
4441 if (rtype && TYPE_DOMAIN (TREE_TYPE (TYPE_FIELDS (rtype))))
4442 max_index = array_type_nelts (TREE_TYPE (TYPE_FIELDS
4446 if (!reshape_init_array (TREE_TYPE (type), max_index,
4448 return error_mark_node;
4453 /* The initializers were placed in reverse order in the
4455 CONSTRUCTOR_ELTS (new_init) = nreverse (CONSTRUCTOR_ELTS (new_init));
4457 if (TREE_CODE (old_init) == TREE_LIST)
4458 new_init = build_tree_list (TREE_PURPOSE (old_init), new_init);
4461 /* If this was a brace-enclosed initializer and all of the
4462 initializers were not used up, there is a problem. */
4463 if (brace_enclosed_p && *initp)
4464 error ("too many initializers for %qT", type);
4469 /* Verify INIT (the initializer for DECL), and record the
4470 initialization in DECL_INITIAL, if appropriate. CLEANUP is as for
4471 grok_reference_init.
4473 If the return value is non-NULL, it is an expression that must be
4474 evaluated dynamically to initialize DECL. */
4477 check_initializer (tree decl, tree init, int flags, tree *cleanup)
4479 tree type = TREE_TYPE (decl);
4480 tree init_code = NULL;
4482 /* If `start_decl' didn't like having an initialization, ignore it now. */
4483 if (init != NULL_TREE && DECL_INITIAL (decl) == NULL_TREE)
4486 /* If an initializer is present, DECL_INITIAL has been
4487 error_mark_node, to indicate that an as-of-yet unevaluated
4488 initialization will occur. From now on, DECL_INITIAL reflects
4489 the static initialization -- if any -- of DECL. */
4490 DECL_INITIAL (decl) = NULL_TREE;
4492 /* Things that are going to be initialized need to have complete
4494 TREE_TYPE (decl) = type = complete_type (TREE_TYPE (decl));
4496 if (type == error_mark_node)
4497 /* We will have already complained. */
4499 else if (init && COMPLETE_TYPE_P (type)
4500 && !TREE_CONSTANT (TYPE_SIZE (type)))
4502 error ("variable-sized object %qD may not be initialized", decl);
4505 else if (TREE_CODE (type) == ARRAY_TYPE
4506 && !COMPLETE_TYPE_P (complete_type (TREE_TYPE (type))))
4508 error ("elements of array %q#D have incomplete type", decl);
4511 else if (TREE_CODE (type) != ARRAY_TYPE && !COMPLETE_TYPE_P (type))
4513 error ("%qD has incomplete type", decl);
4514 TREE_TYPE (decl) = error_mark_node;
4518 if (TREE_CODE (decl) == CONST_DECL)
4520 gcc_assert (TREE_CODE (decl) != REFERENCE_TYPE);
4522 DECL_INITIAL (decl) = init;
4524 gcc_assert (init != NULL_TREE);
4527 else if (!DECL_EXTERNAL (decl) && TREE_CODE (type) == REFERENCE_TYPE)
4528 init = grok_reference_init (decl, type, init, cleanup);
4531 if (TREE_CODE (init) == CONSTRUCTOR
4532 && BRACE_ENCLOSED_INITIALIZER_P (init))
4534 /* [dcl.init] paragraph 13,
4535 If T is a scalar type, then a declaration of the form
4540 reshape_init will complain about the extra braces,
4541 and doesn't do anything useful in the case where TYPE is
4542 scalar, so just don't call it. */
4543 if (CP_AGGREGATE_TYPE_P (type))
4544 init = reshape_init (type, &init);
4546 if ((*targetm.vector_opaque_p) (type))
4548 error ("opaque vector types cannot be initialized");
4549 init = error_mark_node;
4553 /* If DECL has an array type without a specific bound, deduce the
4554 array size from the initializer. */
4555 maybe_deduce_size_from_array_init (decl, init);
4556 type = TREE_TYPE (decl);
4558 if (TYPE_HAS_CONSTRUCTOR (type) || TYPE_NEEDS_CONSTRUCTING (type))
4560 if (TREE_CODE (type) == ARRAY_TYPE)
4561 goto initialize_aggr;
4562 else if (TREE_CODE (init) == CONSTRUCTOR
4563 && BRACE_ENCLOSED_INITIALIZER_P (init))
4565 if (TYPE_NON_AGGREGATE_CLASS (type))
4567 error ("%qD must be initialized by constructor, "
4570 init = error_mark_node;
4573 goto dont_use_constructor;
4577 int saved_stmts_are_full_exprs_p;
4580 saved_stmts_are_full_exprs_p = 0;
4581 if (building_stmt_tree ())
4583 saved_stmts_are_full_exprs_p = stmts_are_full_exprs_p ();
4584 current_stmt_tree ()->stmts_are_full_exprs_p = 1;
4586 init = build_aggr_init (decl, init, flags);
4587 if (building_stmt_tree ())
4588 current_stmt_tree ()->stmts_are_full_exprs_p =
4589 saved_stmts_are_full_exprs_p;
4595 dont_use_constructor:
4596 if (TREE_CODE (init) != TREE_VEC)
4598 init_code = store_init_value (decl, init);
4603 else if (DECL_EXTERNAL (decl))
4605 else if (TYPE_P (type) && TYPE_NEEDS_CONSTRUCTING (type))
4606 goto initialize_aggr;
4607 else if (IS_AGGR_TYPE (type))
4609 tree core_type = strip_array_types (type);
4611 if (CLASSTYPE_READONLY_FIELDS_NEED_INIT (core_type))
4612 error ("structure %qD with uninitialized const members", decl);
4613 if (CLASSTYPE_REF_FIELDS_NEED_INIT (core_type))
4614 error ("structure %qD with uninitialized reference members", decl);
4616 check_for_uninitialized_const_var (decl);
4619 check_for_uninitialized_const_var (decl);
4621 if (init && init != error_mark_node)
4622 init_code = build2 (INIT_EXPR, type, decl, init);
4627 /* If DECL is not a local variable, give it RTL. */
4630 make_rtl_for_nonlocal_decl (tree decl, tree init, const char* asmspec)
4632 int toplev = toplevel_bindings_p ();
4635 /* Set the DECL_ASSEMBLER_NAME for the object. */
4638 /* The `register' keyword, when used together with an
4639 asm-specification, indicates that the variable should be
4640 placed in a particular register. */
4641 if (TREE_CODE (decl) == VAR_DECL && DECL_REGISTER (decl))
4643 change_decl_assembler_name (decl, get_identifier (asmspec));
4644 DECL_HARD_REGISTER (decl) = 1;
4648 if (TREE_CODE (decl) == FUNCTION_DECL
4649 && DECL_BUILT_IN_CLASS (decl) == BUILT_IN_NORMAL)
4650 set_builtin_user_assembler_name (decl, asmspec);
4651 set_user_assembler_name (decl, asmspec);
4655 /* Handle non-variables up front. */
4656 if (TREE_CODE (decl) != VAR_DECL)
4658 rest_of_decl_compilation (decl, toplev, at_eof);
4662 /* If we see a class member here, it should be a static data
4664 if (DECL_LANG_SPECIFIC (decl) && DECL_IN_AGGR_P (decl))
4666 gcc_assert (TREE_STATIC (decl));
4667 /* An in-class declaration of a static data member should be
4668 external; it is only a declaration, and not a definition. */
4669 if (init == NULL_TREE)
4670 gcc_assert (DECL_EXTERNAL (decl));
4673 /* We don't create any RTL for local variables. */
4674 if (DECL_FUNCTION_SCOPE_P (decl) && !TREE_STATIC (decl))
4677 /* We defer emission of local statics until the corresponding
4678 DECL_EXPR is expanded. */
4679 defer_p = DECL_FUNCTION_SCOPE_P (decl) || DECL_VIRTUAL_P (decl);
4681 /* We try to defer namespace-scope static constants so that they are
4682 not emitted into the object file unnecessarily. */
4683 if (!DECL_VIRTUAL_P (decl)
4684 && TREE_READONLY (decl)
4685 && DECL_INITIAL (decl) != NULL_TREE
4686 && DECL_INITIAL (decl) != error_mark_node
4687 && ! EMPTY_CONSTRUCTOR_P (DECL_INITIAL (decl))
4689 && !TREE_PUBLIC (decl))
4691 /* Fool with the linkage of static consts according to #pragma
4693 struct c_fileinfo *finfo = get_fileinfo (lbasename (input_filename));
4694 if (!finfo->interface_unknown && !TREE_PUBLIC (decl))
4696 TREE_PUBLIC (decl) = 1;
4697 DECL_EXTERNAL (decl) = finfo->interface_only;
4702 /* Likewise for template instantiations. */
4703 else if (DECL_LANG_SPECIFIC (decl)
4704 && DECL_IMPLICIT_INSTANTIATION (decl))
4707 /* If we're not deferring, go ahead and assemble the variable. */
4709 rest_of_decl_compilation (decl, toplev, at_eof);
4712 /* Generate code to initialize DECL (a local variable). */
4715 initialize_local_var (tree decl, tree init)
4717 tree type = TREE_TYPE (decl);
4720 gcc_assert (TREE_CODE (decl) == VAR_DECL
4721 || TREE_CODE (decl) == RESULT_DECL);
4722 gcc_assert (!TREE_STATIC (decl));
4724 if (DECL_SIZE (decl) == NULL_TREE)
4726 /* If we used it already as memory, it must stay in memory. */
4727 DECL_INITIAL (decl) = NULL_TREE;
4728 TREE_ADDRESSABLE (decl) = TREE_USED (decl);
4731 if (DECL_SIZE (decl) && type != error_mark_node)
4735 /* Compute and store the initial value. */
4736 already_used = TREE_USED (decl) || TREE_USED (type);
4738 /* Perform the initialization. */
4741 int saved_stmts_are_full_exprs_p;
4743 gcc_assert (building_stmt_tree ());
4744 saved_stmts_are_full_exprs_p = stmts_are_full_exprs_p ();
4745 current_stmt_tree ()->stmts_are_full_exprs_p = 1;
4746 finish_expr_stmt (init);
4747 current_stmt_tree ()->stmts_are_full_exprs_p =
4748 saved_stmts_are_full_exprs_p;
4751 /* Set this to 0 so we can tell whether an aggregate which was
4752 initialized was ever used. Don't do this if it has a
4753 destructor, so we don't complain about the 'resource
4754 allocation is initialization' idiom. Now set
4755 attribute((unused)) on types so decls of that type will be
4756 marked used. (see TREE_USED, above.) */
4757 if (TYPE_NEEDS_CONSTRUCTING (type)
4759 && TYPE_HAS_TRIVIAL_DESTRUCTOR (type)
4760 && DECL_NAME (decl))
4761 TREE_USED (decl) = 0;
4762 else if (already_used)
4763 TREE_USED (decl) = 1;
4766 /* Generate a cleanup, if necessary. */
4767 cleanup = cxx_maybe_build_cleanup (decl);
4768 if (DECL_SIZE (decl) && cleanup)
4769 finish_decl_cleanup (decl, cleanup);
4772 /* DECL is a VAR_DECL for a compiler-generated variable with static
4773 storage duration (like a virtual table) whose initializer is a
4774 compile-time constant. Initialize the variable and provide it to
4778 initialize_artificial_var (tree decl, tree init)
4780 DECL_INITIAL (decl) = build_constructor (NULL_TREE, init);
4781 DECL_INITIALIZED_P (decl) = 1;
4782 determine_visibility (decl);
4783 layout_var_decl (decl);
4784 maybe_commonize_var (decl);
4785 make_rtl_for_nonlocal_decl (decl, init, /*asmspec=*/NULL);
4788 /* Finish processing of a declaration;
4789 install its line number and initial value.
4790 If the length of an array type is not known before,
4791 it must be determined now, from the initial value, or it is an error.
4793 INIT holds the value of an initializer that should be allowed to escape
4796 FLAGS is LOOKUP_ONLYCONVERTING if the = init syntax was used, else 0
4797 if the (init) syntax was used. */
4800 cp_finish_decl (tree decl, tree init, tree asmspec_tree, int flags)
4803 tree ttype = NULL_TREE;
4805 const char *asmspec = NULL;
4806 int was_readonly = 0;
4807 bool var_definition_p = false;
4809 if (decl == error_mark_node)
4814 error ("assignment (not initialization) in declaration");
4818 gcc_assert (TREE_CODE (decl) != RESULT_DECL);
4820 /* Assume no cleanup is required. */
4821 cleanup = NULL_TREE;
4823 /* If a name was specified, get the string. */
4824 if (global_scope_p (current_binding_level))
4825 asmspec_tree = maybe_apply_renaming_pragma (decl, asmspec_tree);
4827 asmspec = TREE_STRING_POINTER (asmspec_tree);
4829 if (init && TREE_CODE (init) == NAMESPACE_DECL)
4831 error ("cannot initialize %qD to namespace %qD", decl, init);
4835 if (current_class_type
4836 && CP_DECL_CONTEXT (decl) == current_class_type
4837 && TYPE_BEING_DEFINED (current_class_type)
4838 && (DECL_INITIAL (decl) || init))
4839 DECL_INITIALIZED_IN_CLASS_P (decl) = 1;
4841 type = TREE_TYPE (decl);
4843 if (type == error_mark_node)
4846 if (TYPE_HAS_MUTABLE_P (type))
4847 TREE_READONLY (decl) = 0;
4849 if (processing_template_decl)
4851 /* Add this declaration to the statement-tree. */
4852 if (at_function_scope_p ())
4853 add_decl_expr (decl);
4855 if (init && DECL_INITIAL (decl))
4856 DECL_INITIAL (decl) = init;
4857 if (TREE_CODE (decl) == VAR_DECL
4858 && !DECL_PRETTY_FUNCTION_P (decl)
4859 && !dependent_type_p (TREE_TYPE (decl)))
4860 maybe_deduce_size_from_array_init (decl, init);
4865 /* Parameters are handled by store_parm_decls, not cp_finish_decl. */
4866 gcc_assert (TREE_CODE (decl) != PARM_DECL);
4868 /* Take care of TYPE_DECLs up front. */
4869 if (TREE_CODE (decl) == TYPE_DECL)
4871 if (type != error_mark_node
4872 && IS_AGGR_TYPE (type) && DECL_NAME (decl))
4874 if (TREE_TYPE (DECL_NAME (decl)) && TREE_TYPE (decl) != type)
4875 warning ("shadowing previous type declaration of %q#D", decl);
4876 set_identifier_type_value (DECL_NAME (decl), decl);
4879 /* If we have installed this as the canonical typedef for this
4880 type, and that type has not been defined yet, delay emitting
4881 the debug information for it, as we will emit it later. */
4882 if (TYPE_MAIN_DECL (TREE_TYPE (decl)) == decl
4883 && !COMPLETE_TYPE_P (TREE_TYPE (decl)))
4884 TYPE_DECL_SUPPRESS_DEBUG (decl) = 1;
4886 rest_of_decl_compilation (decl, DECL_CONTEXT (decl) == NULL_TREE,
4891 if (TREE_CODE (decl) != FUNCTION_DECL)
4892 ttype = target_type (type);
4895 /* Currently, GNU C++ puts constants in text space, making them
4896 impossible to initialize. In the future, one would hope for
4897 an operating system which understood the difference between
4898 initialization and the running of a program. */
4899 if (! DECL_EXTERNAL (decl) && TREE_READONLY (decl))
4902 if (TYPE_NEEDS_CONSTRUCTING (type)
4903 || TREE_CODE (type) == REFERENCE_TYPE)
4904 TREE_READONLY (decl) = 0;
4907 if (TREE_CODE (decl) == VAR_DECL)
4909 /* Only PODs can have thread-local storage. Other types may require
4910 various kinds of non-trivial initialization. */
4911 if (DECL_THREAD_LOCAL (decl) && !pod_type_p (TREE_TYPE (decl)))
4912 error ("%qD cannot be thread-local because it has non-POD type %qT",
4913 decl, TREE_TYPE (decl));
4914 /* Convert the initializer to the type of DECL, if we have not
4915 already initialized DECL. */
4916 if (!DECL_INITIALIZED_P (decl)
4917 /* If !DECL_EXTERNAL then DECL is being defined. In the
4918 case of a static data member initialized inside the
4919 class-specifier, there can be an initializer even if DECL
4920 is *not* defined. */
4921 && (!DECL_EXTERNAL (decl) || init))
4923 init = check_initializer (decl, init, flags, &cleanup);
4924 /* Thread-local storage cannot be dynamically initialized. */
4925 if (DECL_THREAD_LOCAL (decl) && init)
4927 error ("%qD is thread-local and so cannot be dynamically "
4928 "initialized", decl);
4935 The memory occupied by any object of static storage
4936 duration is zero-initialized at program startup before
4937 any other initialization takes place.
4939 We cannot create an appropriate initializer until after
4940 the type of DECL is finalized. If DECL_INITIAL is set,
4941 then the DECL is statically initialized, and any
4942 necessary zero-initialization has already been performed. */
4943 if (TREE_STATIC (decl) && !DECL_INITIAL (decl))
4944 DECL_INITIAL (decl) = build_zero_init (TREE_TYPE (decl),
4945 /*nelts=*/NULL_TREE,
4946 /*static_storage_p=*/true);
4947 /* Remember that the initialization for this variable has
4949 DECL_INITIALIZED_P (decl) = 1;
4950 /* This declaration is the definition of this variable,
4951 unless we are initializing a static data member within
4952 the class specifier. */
4953 if (!DECL_EXTERNAL (decl))
4954 var_definition_p = true;
4955 /* The variable is being defined, so determine its
4957 determine_visibility (decl);
4959 /* If the variable has an array type, lay out the type, even if
4960 there is no initializer. It is valid to index through the
4961 array, and we must get TYPE_ALIGN set correctly on the array
4963 else if (TREE_CODE (type) == ARRAY_TYPE)
4967 /* Add this declaration to the statement-tree. This needs to happen
4968 after the call to check_initializer so that the DECL_EXPR for a
4969 reference temp is added before the DECL_EXPR for the reference itself. */
4970 if (at_function_scope_p ())
4971 add_decl_expr (decl);
4973 if (TREE_CODE (decl) == VAR_DECL)
4974 layout_var_decl (decl);
4976 /* Output the assembler code and/or RTL code for variables and functions,
4977 unless the type is an undefined structure or union.
4978 If not, it will get done when the type is completed. */
4979 if (TREE_CODE (decl) == VAR_DECL || TREE_CODE (decl) == FUNCTION_DECL)
4981 if (TREE_CODE (decl) == VAR_DECL)
4982 maybe_commonize_var (decl);
4984 make_rtl_for_nonlocal_decl (decl, init, asmspec);
4986 /* Check for abstractness of the type. Notice that there is no
4987 need to strip array types here since the check for those types
4988 is already done within create_array_type_for_decl. */
4989 if (TREE_CODE (type) == FUNCTION_TYPE
4990 || TREE_CODE (type) == METHOD_TYPE)
4991 abstract_virtuals_error (decl, TREE_TYPE (type));
4993 abstract_virtuals_error (decl, type);
4995 if (TREE_CODE (decl) == FUNCTION_DECL
4996 || TREE_TYPE (decl) == error_mark_node)
4997 /* No initialization required. */
4999 else if (DECL_EXTERNAL (decl)
5000 && ! (DECL_LANG_SPECIFIC (decl)
5001 && DECL_NOT_REALLY_EXTERN (decl)))
5004 DECL_INITIAL (decl) = init;
5008 /* A variable definition. */
5009 if (DECL_FUNCTION_SCOPE_P (decl))
5011 /* Initialize the local variable. */
5012 if (processing_template_decl)
5014 if (init || DECL_INITIAL (decl) == error_mark_node)
5015 DECL_INITIAL (decl) = init;
5017 else if (!TREE_STATIC (decl))
5018 initialize_local_var (decl, init);
5021 /* If a variable is defined, and then a subsequent
5022 definition with external linkage is encountered, we will
5023 get here twice for the same variable. We want to avoid
5024 calling expand_static_init more than once. For variables
5025 that are not static data members, we can call
5026 expand_static_init only when we actually process the
5027 initializer. It is not legal to redeclare a static data
5028 member, so this issue does not arise in that case. */
5029 if (var_definition_p && TREE_STATIC (decl))
5030 expand_static_init (decl, init);
5034 /* If a CLEANUP_STMT was created to destroy a temporary bound to a
5035 reference, insert it in the statement-tree now. */
5037 push_cleanup (decl, cleanup, false);
5042 TREE_READONLY (decl) = 1;
5044 /* If this was marked 'used', be sure it will be output. */
5045 if (lookup_attribute ("used", DECL_ATTRIBUTES (decl)))
5046 mark_decl_referenced (decl);
5049 /* This is here for a midend callback from c-common.c. */
5052 finish_decl (tree decl, tree init, tree asmspec_tree)
5054 cp_finish_decl (decl, init, asmspec_tree, 0);
5057 /* Returns a declaration for a VAR_DECL as if:
5059 extern "C" TYPE NAME;
5061 had been seen. Used to create compiler-generated global
5065 declare_global_var (tree name, tree type)
5069 push_to_top_level ();
5070 decl = build_decl (VAR_DECL, name, type);
5071 TREE_PUBLIC (decl) = 1;
5072 DECL_EXTERNAL (decl) = 1;
5073 DECL_ARTIFICIAL (decl) = 1;
5074 /* If the user has explicitly declared this variable (perhaps
5075 because the code we are compiling is part of a low-level runtime
5076 library), then it is possible that our declaration will be merged
5077 with theirs by pushdecl. */
5078 decl = pushdecl (decl);
5079 cp_finish_decl (decl, NULL_TREE, NULL_TREE, 0);
5080 pop_from_top_level ();
5085 /* Returns a pointer to the `atexit' function. Note that if
5086 FLAG_USE_CXA_ATEXIT is nonzero, then this will actually be the new
5087 `__cxa_atexit' function specified in the IA64 C++ ABI. */
5090 get_atexit_node (void)
5101 if (flag_use_cxa_atexit)
5103 /* The declaration for `__cxa_atexit' is:
5105 int __cxa_atexit (void (*)(void *), void *, void *)
5107 We build up the argument types and then then function type
5110 /* First, build the pointer-to-function type for the first
5112 arg_types = tree_cons (NULL_TREE, ptr_type_node, void_list_node);
5113 fn_type = build_function_type (void_type_node, arg_types);
5114 fn_ptr_type = build_pointer_type (fn_type);
5115 /* Then, build the rest of the argument types. */
5116 arg_types = tree_cons (NULL_TREE, ptr_type_node, void_list_node);
5117 arg_types = tree_cons (NULL_TREE, ptr_type_node, arg_types);
5118 arg_types = tree_cons (NULL_TREE, fn_ptr_type, arg_types);
5119 /* And the final __cxa_atexit type. */
5120 fn_type = build_function_type (integer_type_node, arg_types);
5121 fn_ptr_type = build_pointer_type (fn_type);
5122 name = "__cxa_atexit";
5126 /* The declaration for `atexit' is:
5128 int atexit (void (*)());
5130 We build up the argument types and then then function type
5132 fn_type = build_function_type (void_type_node, void_list_node);
5133 fn_ptr_type = build_pointer_type (fn_type);
5134 arg_types = tree_cons (NULL_TREE, fn_ptr_type, void_list_node);
5135 /* Build the final atexit type. */
5136 fn_type = build_function_type (integer_type_node, arg_types);
5140 /* Now, build the function declaration. */
5141 push_lang_context (lang_name_c);
5142 atexit_fndecl = build_library_fn_ptr (name, fn_type);
5143 mark_used (atexit_fndecl);
5144 pop_lang_context ();
5145 atexit_node = decay_conversion (atexit_fndecl);
5150 /* Returns the __dso_handle VAR_DECL. */
5153 get_dso_handle_node (void)
5155 if (dso_handle_node)
5156 return dso_handle_node;
5158 /* Declare the variable. */
5159 dso_handle_node = declare_global_var (get_identifier ("__dso_handle"),
5162 return dso_handle_node;
5165 /* Begin a new function with internal linkage whose job will be simply
5166 to destroy some particular variable. */
5168 static GTY(()) int start_cleanup_cnt;
5171 start_cleanup_fn (void)
5178 push_to_top_level ();
5180 /* No need to mangle this. */
5181 push_lang_context (lang_name_c);
5183 /* Build the parameter-types. */
5184 parmtypes = void_list_node;
5185 /* Functions passed to __cxa_atexit take an additional parameter.
5186 We'll just ignore it. After we implement the new calling
5187 convention for destructors, we can eliminate the use of
5188 additional cleanup functions entirely in the -fnew-abi case. */
5189 if (flag_use_cxa_atexit)
5190 parmtypes = tree_cons (NULL_TREE, ptr_type_node, parmtypes);
5191 /* Build the function type itself. */
5192 fntype = build_function_type (void_type_node, parmtypes);
5193 /* Build the name of the function. */
5194 sprintf (name, "__tcf_%d", start_cleanup_cnt++);
5195 /* Build the function declaration. */
5196 fndecl = build_lang_decl (FUNCTION_DECL, get_identifier (name), fntype);
5197 /* It's a function with internal linkage, generated by the
5199 TREE_PUBLIC (fndecl) = 0;
5200 DECL_ARTIFICIAL (fndecl) = 1;
5201 /* Make the function `inline' so that it is only emitted if it is
5202 actually needed. It is unlikely that it will be inlined, since
5203 it is only called via a function pointer, but we avoid unnecessary
5204 emissions this way. */
5205 DECL_INLINE (fndecl) = 1;
5206 DECL_DECLARED_INLINE_P (fndecl) = 1;
5207 DECL_INTERFACE_KNOWN (fndecl) = 1;
5208 /* Build the parameter. */
5209 if (flag_use_cxa_atexit)
5213 parmdecl = cp_build_parm_decl (NULL_TREE, ptr_type_node);
5214 DECL_CONTEXT (parmdecl) = fndecl;
5215 TREE_USED (parmdecl) = 1;
5216 DECL_ARGUMENTS (fndecl) = parmdecl;
5220 start_preparsed_function (fndecl, NULL_TREE, SF_PRE_PARSED);
5222 pop_lang_context ();
5224 return current_function_decl;
5227 /* Finish the cleanup function begun by start_cleanup_fn. */
5230 end_cleanup_fn (void)
5232 expand_or_defer_fn (finish_function (0));
5234 pop_from_top_level ();
5237 /* Generate code to handle the destruction of DECL, an object with
5238 static storage duration. */
5241 register_dtor_fn (tree decl)
5248 if (TYPE_HAS_TRIVIAL_DESTRUCTOR (TREE_TYPE (decl)))
5249 return void_zero_node;
5251 /* Call build_cleanup before we enter the anonymous function so that
5252 any access checks will be done relative to the current scope,
5253 rather than the scope of the anonymous function. */
5254 build_cleanup (decl);
5256 /* Now start the function. */
5257 cleanup = start_cleanup_fn ();
5259 /* Now, recompute the cleanup. It may contain SAVE_EXPRs that refer
5260 to the original function, rather than the anonymous one. That
5261 will make the back-end think that nested functions are in use,
5262 which causes confusion. */
5264 push_deferring_access_checks (dk_no_check);
5265 fcall = build_cleanup (decl);
5266 pop_deferring_access_checks ();
5268 /* Create the body of the anonymous function. */
5269 compound_stmt = begin_compound_stmt (BCS_FN_BODY);
5270 finish_expr_stmt (fcall);
5271 finish_compound_stmt (compound_stmt);
5274 /* Call atexit with the cleanup function. */
5275 cxx_mark_addressable (cleanup);
5276 mark_used (cleanup);
5277 cleanup = build_unary_op (ADDR_EXPR, cleanup, 0);
5278 if (flag_use_cxa_atexit)
5280 args = tree_cons (NULL_TREE,
5281 build_unary_op (ADDR_EXPR, get_dso_handle_node (), 0),
5283 args = tree_cons (NULL_TREE, null_pointer_node, args);
5284 args = tree_cons (NULL_TREE, cleanup, args);
5287 args = tree_cons (NULL_TREE, cleanup, NULL_TREE);
5288 return build_function_call (get_atexit_node (), args);
5291 /* DECL is a VAR_DECL with static storage duration. INIT, if present,
5292 is its initializer. Generate code to handle the construction
5293 and destruction of DECL. */
5296 expand_static_init (tree decl, tree init)
5298 gcc_assert (TREE_CODE (decl) == VAR_DECL);
5299 gcc_assert (TREE_STATIC (decl));
5301 /* Some variables require no initialization. */
5303 && !TYPE_NEEDS_CONSTRUCTING (TREE_TYPE (decl))
5304 && TYPE_HAS_TRIVIAL_DESTRUCTOR (TREE_TYPE (decl)))
5307 if (DECL_FUNCTION_SCOPE_P (decl))
5309 /* Emit code to perform this initialization but once. */
5310 tree if_stmt, inner_if_stmt = NULL_TREE;
5311 tree then_clause, inner_then_clause = NULL_TREE;
5312 tree guard, guard_addr, guard_addr_list;
5313 tree acquire_fn, release_fn, abort_fn;
5316 /* Emit code to perform this initialization but once. This code
5319 static <type> guard;
5320 if (!guard.first_byte) {
5321 if (__cxa_guard_acquire (&guard)) {
5324 // Do initialization.
5325 flag = true; __cxa_guard_release (&guard);
5326 // Register variable for destruction at end of program.
5328 if (!flag) __cxa_guard_abort (&guard);
5332 Note that the `flag' variable is only set to 1 *after* the
5333 initialization is complete. This ensures that an exception,
5334 thrown during the construction, will cause the variable to
5335 reinitialized when we pass through this code again, as per:
5339 If the initialization exits by throwing an exception, the
5340 initialization is not complete, so it will be tried again
5341 the next time control enters the declaration.
5343 This process should be thread-safe, too; multiple threads
5344 should not be able to initialize the variable more than
5347 /* Create the guard variable. */
5348 guard = get_guard (decl);
5350 /* Begin the conditional initialization. */
5351 if_stmt = begin_if_stmt ();
5352 finish_if_stmt_cond (get_guard_cond (guard), if_stmt);
5353 then_clause = begin_compound_stmt (BCS_NO_SCOPE);
5355 if (flag_threadsafe_statics)
5357 guard_addr = build_address (guard);
5358 guard_addr_list = build_tree_list (NULL_TREE, guard_addr);
5360 acquire_fn = get_identifier ("__cxa_guard_acquire");
5361 release_fn = get_identifier ("__cxa_guard_release");
5362 abort_fn = get_identifier ("__cxa_guard_abort");
5363 if (!get_global_value_if_present (acquire_fn, &acquire_fn))
5365 tree argtypes = tree_cons (NULL_TREE, TREE_TYPE (guard_addr),
5367 tree vfntype = build_function_type (void_type_node, argtypes);
5368 acquire_fn = push_library_fn
5369 (acquire_fn, build_function_type (integer_type_node, argtypes));
5370 release_fn = push_library_fn (release_fn, vfntype);
5371 abort_fn = push_library_fn (abort_fn, vfntype);
5375 release_fn = identifier_global_value (release_fn);
5376 abort_fn = identifier_global_value (abort_fn);
5379 inner_if_stmt = begin_if_stmt ();
5380 finish_if_stmt_cond (build_call (acquire_fn, guard_addr_list),
5383 inner_then_clause = begin_compound_stmt (BCS_NO_SCOPE);
5384 begin = get_target_expr (boolean_false_node);
5385 flag = TARGET_EXPR_SLOT (begin);
5387 TARGET_EXPR_CLEANUP (begin)
5388 = build (COND_EXPR, void_type_node, flag,
5390 build_call (abort_fn, guard_addr_list));
5391 CLEANUP_EH_ONLY (begin) = 1;
5393 /* Do the initialization itself. */
5394 init = add_stmt_to_compound (begin, init);
5395 init = add_stmt_to_compound
5396 (init, build (MODIFY_EXPR, void_type_node, flag, boolean_true_node));
5397 init = add_stmt_to_compound
5398 (init, build_call (release_fn, guard_addr_list));
5401 init = add_stmt_to_compound (init, set_guard (guard));
5403 /* Use atexit to register a function for destroying this static
5405 init = add_stmt_to_compound (init, register_dtor_fn (decl));
5407 finish_expr_stmt (init);
5409 if (flag_threadsafe_statics)
5411 finish_compound_stmt (inner_then_clause);
5412 finish_then_clause (inner_if_stmt);
5413 finish_if_stmt (inner_if_stmt);
5416 finish_compound_stmt (then_clause);
5417 finish_then_clause (if_stmt);
5418 finish_if_stmt (if_stmt);
5421 static_aggregates = tree_cons (init, decl, static_aggregates);
5425 /* Make TYPE a complete type based on INITIAL_VALUE.
5426 Return 0 if successful, 1 if INITIAL_VALUE can't be deciphered,
5427 2 if there was no information (in which case assume 0 if DO_DEFAULT). */
5430 complete_array_type (tree type, tree initial_value, int do_default)
5432 tree maxindex = NULL_TREE;
5437 /* An array of character type can be initialized from a
5438 brace-enclosed string constant. */
5439 if (char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (type)))
5440 && TREE_CODE (initial_value) == CONSTRUCTOR
5441 && CONSTRUCTOR_ELTS (initial_value)
5442 && (TREE_CODE (TREE_VALUE (CONSTRUCTOR_ELTS (initial_value)))
5444 && TREE_CHAIN (CONSTRUCTOR_ELTS (initial_value)) == NULL_TREE)
5445 initial_value = TREE_VALUE (CONSTRUCTOR_ELTS (initial_value));
5447 /* Note MAXINDEX is really the maximum index, one less than the
5449 if (TREE_CODE (initial_value) == STRING_CST)
5452 = int_size_in_bytes (TREE_TYPE (TREE_TYPE (initial_value)));
5453 maxindex = build_int_cst (NULL_TREE,
5454 (TREE_STRING_LENGTH (initial_value)
5457 else if (TREE_CODE (initial_value) == CONSTRUCTOR)
5459 tree elts = CONSTRUCTOR_ELTS (initial_value);
5461 maxindex = ssize_int (-1);
5462 for (; elts; elts = TREE_CHAIN (elts))
5464 if (TREE_PURPOSE (elts))
5465 maxindex = TREE_PURPOSE (elts);
5467 maxindex = size_binop (PLUS_EXPR, maxindex, ssize_int (1));
5472 /* Make an error message unless that happened already. */
5473 if (initial_value != error_mark_node)
5476 initial_value = NULL_TREE;
5478 /* Prevent further error messages. */
5479 maxindex = build_int_cst (NULL_TREE, 0);
5486 maxindex = build_int_cst (NULL_TREE, 0);
5496 domain = build_index_type (maxindex);
5497 TYPE_DOMAIN (type) = domain;
5500 itype = TREE_TYPE (initial_value);
5503 if (itype && !TYPE_DOMAIN (itype))
5504 TYPE_DOMAIN (itype) = domain;
5505 /* The type of the main variant should never be used for arrays
5506 of different sizes. It should only ever be completed with the
5507 size of the array. */
5508 if (! TYPE_DOMAIN (TYPE_MAIN_VARIANT (type)))
5509 TYPE_DOMAIN (TYPE_MAIN_VARIANT (type)) = domain;
5511 elt_type = TREE_TYPE (type);
5512 TYPE_NEEDS_CONSTRUCTING (type)
5513 = TYPE_NEEDS_CONSTRUCTING (TYPE_MAIN_VARIANT (elt_type));
5514 TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type)
5515 = TYPE_HAS_NONTRIVIAL_DESTRUCTOR (TYPE_MAIN_VARIANT (elt_type));
5518 /* Lay out the type now that we can get the real answer. */
5525 /* Return zero if something is declared to be a member of type
5526 CTYPE when in the context of CUR_TYPE. STRING is the error
5527 message to print in that case. Otherwise, quietly return 1. */
5530 member_function_or_else (tree ctype, tree cur_type, enum overload_flags flags)
5532 if (ctype && ctype != cur_type)
5534 if (flags == DTOR_FLAG)
5535 error ("destructor for alien class %qT cannot be a member", ctype);
5537 error ("constructor for alien class %qT cannot be a member", ctype);
5543 /* Subroutine of `grokdeclarator'. */
5545 /* Generate errors possibly applicable for a given set of specifiers.
5546 This is for ARM $7.1.2. */
5549 bad_specifiers (tree object,
5558 error ("%qD declared as a %<virtual%> %s", object, type);
5560 error ("%qD declared as an %<inline%> %s", object, type);
5562 error ("%<const%> and %<volatile%> function specifiers on "
5563 "%qD invalid in %s declaration",
5566 cp_error_at ("%qD declared as a friend", object);
5568 && (TREE_CODE (object) == TYPE_DECL
5569 || (!TYPE_PTRFN_P (TREE_TYPE (object))
5570 && !TYPE_REFFN_P (TREE_TYPE (object))
5571 && !TYPE_PTRMEMFUNC_P (TREE_TYPE (object)))))
5572 cp_error_at ("%qD declared with an exception specification", object);
5575 /* CTYPE is class type, or null if non-class.
5576 TYPE is type this FUNCTION_DECL should have, either FUNCTION_TYPE
5578 DECLARATOR is the function's name.
5579 PARMS is a chain of PARM_DECLs for the function.
5580 VIRTUALP is truthvalue of whether the function is virtual or not.
5581 FLAGS are to be passed through to `grokclassfn'.
5582 QUALS are qualifiers indicating whether the function is `const'
5584 RAISES is a list of exceptions that this function can raise.
5585 CHECK is 1 if we must find this method in CTYPE, 0 if we should
5586 not look, and -1 if we should not call `grokclassfn' at all.
5588 Returns `NULL_TREE' if something goes wrong, after issuing
5589 applicable error messages. */
5592 grokfndecl (tree ctype,
5596 tree orig_declarator,
5598 enum overload_flags flags,
5611 int staticp = ctype && TREE_CODE (type) == FUNCTION_TYPE;
5612 int has_default_arg = 0;
5616 type = build_exception_variant (type, raises);
5618 decl = build_lang_decl (FUNCTION_DECL, declarator, type);
5619 DECL_ARGUMENTS (decl) = parms;
5620 /* Propagate volatile out from type to decl. */
5621 if (TYPE_VOLATILE (type))
5622 TREE_THIS_VOLATILE (decl) = 1;
5624 /* If this decl has namespace scope, set that up. */
5626 set_decl_namespace (decl, in_namespace, friendp);
5628 DECL_CONTEXT (decl) = FROB_CONTEXT (current_namespace);
5630 /* `main' and builtins have implicit 'C' linkage. */
5631 if ((MAIN_NAME_P (declarator)
5632 || (IDENTIFIER_LENGTH (declarator) > 10
5633 && IDENTIFIER_POINTER (declarator)[0] == '_'
5634 && IDENTIFIER_POINTER (declarator)[1] == '_'
5635 && strncmp (IDENTIFIER_POINTER (declarator)+2, "builtin_", 8) == 0))
5636 && current_lang_name == lang_name_cplusplus
5637 && ctype == NULL_TREE
5638 /* NULL_TREE means global namespace. */
5639 && DECL_CONTEXT (decl) == NULL_TREE)
5640 SET_DECL_LANGUAGE (decl, lang_c);
5642 /* Should probably propagate const out from type to decl I bet (mrs). */
5645 DECL_STATIC_FUNCTION_P (decl) = 1;
5646 DECL_CONTEXT (decl) = ctype;
5650 DECL_CONTEXT (decl) = ctype;
5652 if (ctype == NULL_TREE && DECL_MAIN_P (decl))
5654 if (processing_template_decl)
5655 error ("cannot declare %<::main%> to be a template");
5657 error ("cannot declare %<::main%> to be inline");
5659 error ("cannot declare %<::main%> to be static");
5660 if (!same_type_p (TREE_TYPE (TREE_TYPE (decl)),
5663 error ("%<::main%> must return %<int%>");
5664 TREE_TYPE (TREE_TYPE (decl)) = integer_type_node;
5670 /* Members of anonymous types and local classes have no linkage; make
5671 them internal. If a typedef is made later, this will be changed. */
5672 if (ctype && (TYPE_ANONYMOUS_P (ctype)
5673 || decl_function_context (TYPE_MAIN_DECL (ctype))))
5678 /* [basic.link]: A name with no linkage (notably, the name of a class
5679 or enumeration declared in a local scope) shall not be used to
5680 declare an entity with linkage.
5682 Only check this for public decls for now. See core 319, 389. */
5683 t = no_linkage_check (TREE_TYPE (decl),
5684 /*relaxed_p=*/false);
5687 if (TYPE_ANONYMOUS_P (t))
5689 if (DECL_EXTERN_C_P (decl))
5690 /* Allow this; it's pretty common in C. */;
5693 pedwarn ("non-local function %q#D uses anonymous type",
5695 if (DECL_ORIGINAL_TYPE (TYPE_NAME (t)))
5696 cp_pedwarn_at ("%q#D does not refer to the unqualified "
5697 "type, so it is not used for linkage",
5702 pedwarn ("non-local function %q#D uses local type %qT", decl, t);
5706 TREE_PUBLIC (decl) = publicp;
5709 DECL_INTERFACE_KNOWN (decl) = 1;
5710 DECL_NOT_REALLY_EXTERN (decl) = 1;
5713 /* If the declaration was declared inline, mark it as such. */
5715 DECL_DECLARED_INLINE_P (decl) = 1;
5716 /* We inline functions that are explicitly declared inline, or, when
5717 the user explicitly asks us to, all functions. */
5718 if (DECL_DECLARED_INLINE_P (decl)
5719 || (flag_inline_trees == 2 && !DECL_INLINE (decl) && funcdef_flag))
5720 DECL_INLINE (decl) = 1;
5722 DECL_EXTERNAL (decl) = 1;
5723 if (quals && TREE_CODE (type) == FUNCTION_TYPE)
5725 error ("%smember function %qD cannot have cv-qualifier",
5726 (ctype ? "static " : "non-"), decl);
5727 quals = TYPE_UNQUALIFIED;
5730 if (IDENTIFIER_OPNAME_P (DECL_NAME (decl)))
5731 grok_op_properties (decl, friendp, /*complain=*/true);
5733 if (ctype && decl_function_context (decl))
5734 DECL_NO_STATIC_CHAIN (decl) = 1;
5736 for (t = TYPE_ARG_TYPES (TREE_TYPE (decl)); t; t = TREE_CHAIN (t))
5737 if (TREE_PURPOSE (t)
5738 && TREE_CODE (TREE_PURPOSE (t)) == DEFAULT_ARG)
5740 has_default_arg = 1;
5745 && TREE_CODE (orig_declarator) == TEMPLATE_ID_EXPR)
5749 ("defining explicit specialization %qD in friend declaration",
5753 tree fns = TREE_OPERAND (orig_declarator, 0);
5754 tree args = TREE_OPERAND (orig_declarator, 1);
5756 if (PROCESSING_REAL_TEMPLATE_DECL_P ())
5758 /* Something like `template <class T> friend void f<T>()'. */
5759 error ("invalid use of template-id %qD in declaration "
5760 "of primary template",
5766 /* A friend declaration of the form friend void f<>(). Record
5767 the information in the TEMPLATE_ID_EXPR. */
5768 SET_DECL_IMPLICIT_INSTANTIATION (decl);
5770 if (TREE_CODE (fns) == COMPONENT_REF)
5772 /* Due to bison parser ickiness, we will have already looked
5773 up an operator_name or PFUNCNAME within the current class
5774 (see template_id in parse.y). If the current class contains
5775 such a name, we'll get a COMPONENT_REF here. Undo that. */
5777 gcc_assert (TREE_TYPE (TREE_OPERAND (fns, 0))
5778 == current_class_type);
5779 fns = TREE_OPERAND (fns, 1);
5781 gcc_assert (TREE_CODE (fns) == IDENTIFIER_NODE
5782 || TREE_CODE (fns) == OVERLOAD);
5783 DECL_TEMPLATE_INFO (decl) = tree_cons (fns, args, NULL_TREE);
5785 if (has_default_arg)
5787 error ("default arguments are not allowed in declaration "
5788 "of friend template specialization %qD",
5795 error ("%<inline%> is not allowed in declaration of friend "
5796 "template specialization %qD",
5804 /* Make the init_value nonzero so pushdecl knows this is not
5805 tentative. error_mark_node is replaced later with the BLOCK. */
5806 DECL_INITIAL (decl) = error_mark_node;
5808 if (TYPE_NOTHROW_P (type) || nothrow_libfn_p (decl))
5809 TREE_NOTHROW (decl) = 1;
5811 /* Caller will do the rest of this. */
5815 if (flags == NO_SPECIAL && ctype && constructor_name_p (declarator, ctype))
5816 DECL_CONSTRUCTOR_P (decl) = 1;
5818 /* Function gets the ugly name, field gets the nice one. This call
5819 may change the type of the function (because of default
5821 if (ctype != NULL_TREE)
5822 grokclassfn (ctype, decl, flags, quals);
5824 decl = check_explicit_specialization (orig_declarator, decl,
5826 2 * (funcdef_flag != 0) +
5827 4 * (friendp != 0));
5828 if (decl == error_mark_node)
5833 cplus_decl_attributes (&decl, *attrlist, 0);
5834 *attrlist = NULL_TREE;
5837 if (ctype != NULL_TREE
5838 && (! TYPE_FOR_JAVA (ctype) || check_java_method (decl))
5843 old_decl = check_classfn (ctype, decl,
5844 (processing_template_decl
5845 > template_class_depth (ctype))
5846 ? current_template_parms
5849 if (old_decl && TREE_CODE (old_decl) == TEMPLATE_DECL)
5850 /* Because grokfndecl is always supposed to return a
5851 FUNCTION_DECL, we pull out the DECL_TEMPLATE_RESULT
5852 here. We depend on our callers to figure out that its
5853 really a template that's being returned. */
5854 old_decl = DECL_TEMPLATE_RESULT (old_decl);
5856 if (old_decl && DECL_STATIC_FUNCTION_P (old_decl)
5857 && TREE_CODE (TREE_TYPE (decl)) == METHOD_TYPE)
5858 /* Remove the `this' parm added by grokclassfn.
5859 XXX Isn't this done in start_function, too? */
5860 revert_static_member_fn (decl);
5861 if (old_decl && DECL_ARTIFICIAL (old_decl))
5862 error ("definition of implicitly-declared %qD", old_decl);
5869 /* Since we've smashed OLD_DECL to its
5870 DECL_TEMPLATE_RESULT, we must do the same to DECL. */
5871 if (TREE_CODE (decl) == TEMPLATE_DECL)
5872 decl = DECL_TEMPLATE_RESULT (decl);
5874 /* Attempt to merge the declarations. This can fail, in
5875 the case of some invalid specialization declarations. */
5876 pop_p = push_scope (ctype);
5877 ok = duplicate_decls (decl, old_decl);
5882 error ("no %q#D member function declared in class %qT",
5890 if (DECL_CONSTRUCTOR_P (decl) && !grok_ctor_properties (ctype, decl))
5893 if (ctype == NULL_TREE || check)
5897 DECL_VIRTUAL_P (decl) = 1;
5902 /* DECL is a VAR_DECL for a static data member. Set flags to reflect
5903 the linkage that DECL will receive in the object file. */
5906 set_linkage_for_static_data_member (tree decl)
5908 /* A static data member always has static storage duration and
5909 external linkage. Note that static data members are forbidden in
5910 local classes -- the only situation in which a class has
5911 non-external linkage. */
5912 TREE_PUBLIC (decl) = 1;
5913 TREE_STATIC (decl) = 1;
5914 /* For non-template classes, static data members are always put
5915 out in exactly those files where they are defined, just as
5916 with ordinary namespace-scope variables. */
5917 if (!processing_template_decl)
5918 DECL_INTERFACE_KNOWN (decl) = 1;
5921 /* Create a VAR_DECL named NAME with the indicated TYPE.
5923 If SCOPE is non-NULL, it is the class type or namespace containing
5924 the variable. If SCOPE is NULL, the variable should is created in
5925 the innermost enclosings scope. */
5928 grokvardecl (tree type,
5930 const cp_decl_specifier_seq *declspecs,
5936 tree explicit_scope;
5938 gcc_assert (!name || TREE_CODE (name) == IDENTIFIER_NODE);
5940 /* Compute the scope in which to place the variable, but remember
5941 whether or not that scope was explicitly specified by the user. */
5942 explicit_scope = scope;
5945 /* An explicit "extern" specifier indicates a namespace-scope
5947 if (declspecs->storage_class == sc_extern)
5948 scope = current_namespace;
5949 else if (!at_function_scope_p ())
5950 scope = current_scope ();
5954 && (/* If the variable is a namespace-scope variable declared in a
5955 template, we need DECL_LANG_SPECIFIC. */
5956 (TREE_CODE (scope) == NAMESPACE_DECL && processing_template_decl)
5957 /* Similarly for namespace-scope variables with language linkage
5959 || (TREE_CODE (scope) == NAMESPACE_DECL
5960 && current_lang_name != lang_name_cplusplus)
5961 /* Similarly for static data members. */
5963 decl = build_lang_decl (VAR_DECL, name, type);
5965 decl = build_decl (VAR_DECL, name, type);
5967 if (explicit_scope && TREE_CODE (explicit_scope) == NAMESPACE_DECL)
5968 set_decl_namespace (decl, explicit_scope, 0);
5970 DECL_CONTEXT (decl) = scope;
5972 if (declspecs->storage_class == sc_extern)
5974 DECL_THIS_EXTERN (decl) = 1;
5975 DECL_EXTERNAL (decl) = !initialized;
5978 if (DECL_CLASS_SCOPE_P (decl))
5980 set_linkage_for_static_data_member (decl);
5981 /* This function is only called with out-of-class definitions. */
5982 DECL_EXTERNAL (decl) = 0;
5984 /* At top level, either `static' or no s.c. makes a definition
5985 (perhaps tentative), and absence of `static' makes it public. */
5986 else if (toplevel_bindings_p ())
5988 TREE_PUBLIC (decl) = (declspecs->storage_class != sc_static
5989 && (DECL_THIS_EXTERN (decl) || ! constp));
5990 TREE_STATIC (decl) = ! DECL_EXTERNAL (decl);
5992 /* Not at top level, only `static' makes a static definition. */
5995 TREE_STATIC (decl) = declspecs->storage_class == sc_static;
5996 TREE_PUBLIC (decl) = DECL_EXTERNAL (decl);
5999 if (declspecs->specs[(int)ds_thread])
6001 if (targetm.have_tls)
6002 DECL_THREAD_LOCAL (decl) = 1;
6004 /* A mere warning is sure to result in improper semantics
6005 at runtime. Don't bother to allow this to compile. */
6006 error ("thread-local storage not supported for this target");
6009 if (TREE_PUBLIC (decl))
6011 /* [basic.link]: A name with no linkage (notably, the name of a class
6012 or enumeration declared in a local scope) shall not be used to
6013 declare an entity with linkage.
6015 Only check this for public decls for now. */
6016 tree t1 = TREE_TYPE (decl);
6017 tree t = no_linkage_check (t1, /*relaxed_p=*/false);
6020 if (TYPE_ANONYMOUS_P (t))
6022 if (DECL_EXTERN_C_P (decl))
6023 /* Allow this; it's pretty common in C. */
6025 else if (same_type_ignoring_top_level_qualifiers_p(t1, t))
6026 /* This is something like "enum { a = 3 } x;", which is
6027 well formed. The enum doesn't have "a name with no
6028 linkage", because it has no name. See closed CWG issue
6031 Note that while this construct is well formed in C++03
6032 it is likely to become ill formed in C++0x. See open
6033 CWG issue 389 and related issues. */
6037 /* It's a typedef referring to an anonymous type. */
6038 pedwarn ("non-local variable %q#D uses anonymous type",
6040 if (DECL_ORIGINAL_TYPE (TYPE_NAME (t)))
6041 cp_pedwarn_at ("%q#D does not refer to the unqualified "
6042 "type, so it is not used for linkage",
6047 pedwarn ("non-local variable %q#D uses local type %qT", decl, t);
6054 /* Create and return a canonical pointer to member function type, for
6055 TYPE, which is a POINTER_TYPE to a METHOD_TYPE. */
6058 build_ptrmemfunc_type (tree type)
6062 tree unqualified_variant = NULL_TREE;
6064 if (type == error_mark_node)
6067 /* If a canonical type already exists for this type, use it. We use
6068 this method instead of type_hash_canon, because it only does a
6069 simple equality check on the list of field members. */
6071 if ((t = TYPE_GET_PTRMEMFUNC_TYPE (type)))
6074 /* Make sure that we always have the unqualified pointer-to-member
6076 if (cp_type_quals (type) != TYPE_UNQUALIFIED)
6078 = build_ptrmemfunc_type (TYPE_MAIN_VARIANT (type));
6080 t = make_aggr_type (RECORD_TYPE);
6081 xref_basetypes (t, NULL_TREE);
6083 /* Let the front-end know this is a pointer to member function... */
6084 TYPE_PTRMEMFUNC_FLAG (t) = 1;
6085 /* ... and not really an aggregate. */
6086 SET_IS_AGGR_TYPE (t, 0);
6088 field = build_decl (FIELD_DECL, pfn_identifier, type);
6091 field = build_decl (FIELD_DECL, delta_identifier, delta_type_node);
6092 TREE_CHAIN (field) = fields;
6095 finish_builtin_struct (t, "__ptrmemfunc_type", fields, ptr_type_node);
6097 /* Zap out the name so that the back-end will give us the debugging
6098 information for this anonymous RECORD_TYPE. */
6099 TYPE_NAME (t) = NULL_TREE;
6101 /* If this is not the unqualified form of this pointer-to-member
6102 type, set the TYPE_MAIN_VARIANT for this type to be the
6103 unqualified type. Since they are actually RECORD_TYPEs that are
6104 not variants of each other, we must do this manually. */
6105 if (cp_type_quals (type) != TYPE_UNQUALIFIED)
6107 t = build_qualified_type (t, cp_type_quals (type));
6108 TYPE_MAIN_VARIANT (t) = unqualified_variant;
6109 TYPE_NEXT_VARIANT (t) = TYPE_NEXT_VARIANT (unqualified_variant);
6110 TYPE_NEXT_VARIANT (unqualified_variant) = t;
6113 /* Cache this pointer-to-member type so that we can find it again
6115 TYPE_SET_PTRMEMFUNC_TYPE (type, t);
6120 /* Create and return a pointer to data member type. */
6123 build_ptrmem_type (tree class_type, tree member_type)
6125 if (TREE_CODE (member_type) == METHOD_TYPE)
6129 arg_types = TYPE_ARG_TYPES (member_type);
6130 class_type = (cp_build_qualified_type
6132 cp_type_quals (TREE_TYPE (TREE_VALUE (arg_types)))));
6134 = build_method_type_directly (class_type,
6135 TREE_TYPE (member_type),
6136 TREE_CHAIN (arg_types));
6137 return build_ptrmemfunc_type (build_pointer_type (member_type));
6141 gcc_assert (TREE_CODE (member_type) != FUNCTION_TYPE);
6142 return build_offset_type (class_type, member_type);
6146 /* DECL is a VAR_DECL defined in-class, whose TYPE is also given.
6147 Check to see that the definition is valid. Issue appropriate error
6148 messages. Return 1 if the definition is particularly bad, or 0
6152 check_static_variable_definition (tree decl, tree type)
6154 /* Motion 10 at San Diego: If a static const integral data member is
6155 initialized with an integral constant expression, the initializer
6156 may appear either in the declaration (within the class), or in
6157 the definition, but not both. If it appears in the class, the
6158 member is a member constant. The file-scope definition is always
6160 if (!ARITHMETIC_TYPE_P (type) && TREE_CODE (type) != ENUMERAL_TYPE)
6162 error ("invalid in-class initialization of static data member "
6163 "of non-integral type %qT",
6165 /* If we just return the declaration, crashes will sometimes
6166 occur. We therefore return void_type_node, as if this were a
6167 friend declaration, to cause callers to completely ignore
6168 this declaration. */
6171 else if (!CP_TYPE_CONST_P (type))
6172 error ("ISO C++ forbids in-class initialization of non-const "
6173 "static member %qD",
6175 else if (pedantic && !INTEGRAL_TYPE_P (type))
6176 pedwarn ("ISO C++ forbids initialization of member constant "
6177 "%qD of non-integral type %qT", decl, type);
6182 /* Given the SIZE (i.e., number of elements) in an array, compute an
6183 appropriate index type for the array. If non-NULL, NAME is the
6184 name of the thing being declared. */
6187 compute_array_index_type (tree name, tree size)
6189 tree type = TREE_TYPE (size);
6192 /* The array bound must be an integer type. */
6193 if (!dependent_type_p (type) && !INTEGRAL_TYPE_P (type))
6196 error ("size of array %qD has non-integral type %qT", name, type);
6198 error ("size of array has non-integral type %qT", type);
6199 size = integer_one_node;
6200 type = TREE_TYPE (size);
6203 if (abi_version_at_least (2)
6204 /* We should only handle value dependent expressions specially. */
6205 ? value_dependent_expression_p (size)
6206 /* But for abi-1, we handled all instances in templates. This
6207 effects the manglings produced. */
6208 : processing_template_decl)
6209 return build_index_type (build_min (MINUS_EXPR, sizetype,
6210 size, integer_one_node));
6212 /* The size might be the result of a cast. */
6213 STRIP_TYPE_NOPS (size);
6215 /* It might be a const variable or enumeration constant. */
6216 size = integral_constant_value (size);
6218 /* Normally, the array-bound will be a constant. */
6219 if (TREE_CODE (size) == INTEGER_CST)
6221 /* Check to see if the array bound overflowed. Make that an
6222 error, no matter how generous we're being. */
6223 int old_flag_pedantic_errors = flag_pedantic_errors;
6224 int old_pedantic = pedantic;
6225 pedantic = flag_pedantic_errors = 1;
6226 constant_expression_warning (size);
6227 pedantic = old_pedantic;
6228 flag_pedantic_errors = old_flag_pedantic_errors;
6230 /* An array must have a positive number of elements. */
6231 if (INT_CST_LT (size, integer_zero_node))
6234 error ("size of array %qD is negative", name);
6236 error ("size of array is negative");
6237 size = integer_one_node;
6239 /* As an extension we allow zero-sized arrays. We always allow
6240 them in system headers because glibc uses them. */
6241 else if (integer_zerop (size) && pedantic && !in_system_header)
6244 pedwarn ("ISO C++ forbids zero-size array %qD", name);
6246 pedwarn ("ISO C++ forbids zero-size array");
6249 else if (TREE_CONSTANT (size))
6251 /* `(int) &fn' is not a valid array bound. */
6253 error ("size of array %qD is not an integral constant-expression",
6256 error ("size of array is not an integral constant-expression");
6261 pedwarn ("ISO C++ forbids variable-size array %qD", name);
6263 pedwarn ("ISO C++ forbids variable-size array");
6266 if (processing_template_decl && !TREE_CONSTANT (size))
6267 /* A variable sized array. */
6268 itype = build_min (MINUS_EXPR, sizetype, size, integer_one_node);
6271 HOST_WIDE_INT saved_processing_template_decl;
6273 /* Compute the index of the largest element in the array. It is
6274 one less than the number of elements in the array. We save
6275 and restore PROCESSING_TEMPLATE_DECL so that computations in
6276 cp_build_binary_op will be appropriately folded. */
6277 saved_processing_template_decl = processing_template_decl;
6278 processing_template_decl = 0;
6279 itype = cp_build_binary_op (MINUS_EXPR,
6280 cp_convert (ssizetype, size),
6281 cp_convert (ssizetype, integer_one_node));
6282 itype = fold (itype);
6283 processing_template_decl = saved_processing_template_decl;
6285 if (!TREE_CONSTANT (itype))
6286 /* A variable sized array. */
6287 itype = variable_size (itype);
6288 /* Make sure that there was no overflow when creating to a signed
6289 index type. (For example, on a 32-bit machine, an array with
6290 size 2^32 - 1 is too big.) */
6291 else if (TREE_OVERFLOW (itype))
6293 error ("overflow in array dimension");
6294 TREE_OVERFLOW (itype) = 0;
6298 /* Create and return the appropriate index type. */
6299 return build_index_type (itype);
6302 /* Returns the scope (if any) in which the entity declared by
6303 DECLARATOR will be located. If the entity was declared with an
6304 unqualified name, NULL_TREE is returned. */
6307 get_scope_of_declarator (const cp_declarator *declarator)
6309 while (declarator && declarator->kind != cdk_id)
6310 declarator = declarator->declarator;
6312 /* If the declarator-id is a SCOPE_REF, the scope in which the
6313 declaration occurs is the first operand. */
6315 && declarator->u.id.name
6316 && TREE_CODE (declarator->u.id.name) == SCOPE_REF)
6317 return TREE_OPERAND (declarator->u.id.name, 0);
6319 /* Otherwise, the declarator is not a qualified name; the entity will
6320 be declared in the current scope. */
6324 /* Returns an ARRAY_TYPE for an array with SIZE elements of the
6325 indicated TYPE. If non-NULL, NAME is the NAME of the declaration
6329 create_array_type_for_decl (tree name, tree type, tree size)
6331 tree itype = NULL_TREE;
6332 const char* error_msg;
6334 /* If things have already gone awry, bail now. */
6335 if (type == error_mark_node || size == error_mark_node)
6336 return error_mark_node;
6338 /* Assume that everything will go OK. */
6341 /* There are some types which cannot be array elements. */
6342 switch (TREE_CODE (type))
6345 error_msg = "array of void";
6349 error_msg = "array of functions";
6352 case REFERENCE_TYPE:
6353 error_msg = "array of references";
6357 error_msg = "array of function members";
6364 /* If something went wrong, issue an error-message and return. */
6368 error ("declaration of %qD as %s", name, error_msg);
6370 error ("creating %s", error_msg);
6372 return error_mark_node;
6377 The constant expressions that specify the bounds of the arrays
6378 can be omitted only for the first member of the sequence. */
6379 if (TREE_CODE (type) == ARRAY_TYPE && !TYPE_DOMAIN (type))
6382 error ("declaration of %qD as multidimensional array must "
6383 "have bounds for all dimensions except the first",
6386 error ("multidimensional array must have bounds for all "
6387 "dimensions except the first");
6389 return error_mark_node;
6392 /* Figure out the index type for the array. */
6394 itype = compute_array_index_type (name, size);
6397 T is called the array element type; this type shall not be [...] an
6398 abstract class type. */
6399 abstract_virtuals_error (name, type);
6401 return build_cplus_array_type (type, itype);
6404 /* Check that it's OK to declare a function with the indicated TYPE.
6405 SFK indicates the kind of special function (if any) that this
6406 function is. OPTYPE is the type given in a conversion operator
6407 declaration, or the class type for a constructor/destructor.
6408 Returns the actual return type of the function; that
6409 may be different than TYPE if an error occurs, or for certain
6410 special functions. */
6413 check_special_function_return_type (special_function_kind sfk,
6419 case sfk_constructor:
6421 error ("return type specification for constructor invalid");
6423 if (targetm.cxx.cdtor_returns_this () && !TYPE_FOR_JAVA (optype))
6424 type = build_pointer_type (optype);
6426 type = void_type_node;
6429 case sfk_destructor:
6431 error ("return type specification for destructor invalid");
6432 /* We can't use the proper return type here because we run into
6433 problems with ambiguous bases and covariant returns.
6434 Java classes are left unchanged because (void *) isn't a valid
6435 Java type, and we don't want to change the Java ABI. */
6436 if (targetm.cxx.cdtor_returns_this () && !TYPE_FOR_JAVA (optype))
6437 type = build_pointer_type (void_type_node);
6439 type = void_type_node;
6442 case sfk_conversion:
6443 if (type && !same_type_p (type, optype))
6444 error ("operator %qT declared to return %qT", optype, type);
6446 pedwarn ("return type specified for %<operator %T%>", optype);
6457 /* A variable or data member (whose unqualified name is IDENTIFIER)
6458 has been declared with the indicated TYPE. If the TYPE is not
6459 acceptable, issue an error message and return a type to use for
6460 error-recovery purposes. */
6463 check_var_type (tree identifier, tree type)
6465 if (VOID_TYPE_P (type))
6468 error ("unnamed variable or field declared void");
6469 else if (TREE_CODE (identifier) == IDENTIFIER_NODE)
6471 gcc_assert (!IDENTIFIER_OPNAME_P (identifier));
6472 error ("variable or field %qE declared void", identifier);
6475 error ("variable or field declared void");
6476 type = integer_type_node;
6482 /* Given declspecs and a declarator (abstract or otherwise), determine
6483 the name and type of the object declared and construct a DECL node
6486 DECLSPECS is a chain of tree_list nodes whose value fields
6487 are the storage classes and type specifiers.
6489 DECL_CONTEXT says which syntactic context this declaration is in:
6490 NORMAL for most contexts. Make a VAR_DECL or FUNCTION_DECL or TYPE_DECL.
6491 FUNCDEF for a function definition. Like NORMAL but a few different
6492 error messages in each case. Return value may be zero meaning
6493 this definition is too screwy to try to parse.
6494 MEMFUNCDEF for a function definition. Like FUNCDEF but prepares to
6495 handle member functions (which have FIELD context).
6496 Return value may be zero meaning this definition is too screwy to
6498 PARM for a parameter declaration (either within a function prototype
6499 or before a function body). Make a PARM_DECL, or return void_type_node.
6500 CATCHPARM for a parameter declaration before a catch clause.
6501 TYPENAME if for a typename (in a cast or sizeof).
6502 Don't make a DECL node; just return the ..._TYPE node.
6503 FIELD for a struct or union field; make a FIELD_DECL.
6504 BITFIELD for a field with specified width.
6505 INITIALIZED is 1 if the decl has an initializer.
6507 ATTRLIST is a pointer to the list of attributes, which may be NULL
6508 if there are none; *ATTRLIST may be modified if attributes from inside
6509 the declarator should be applied to the declaration.
6511 When this function is called, scoping variables (such as
6512 CURRENT_CLASS_TYPE) should reflect the scope in which the
6513 declaration occurs, not the scope in which the new declaration will
6514 be placed. For example, on:
6518 when grokdeclarator is called for `S::f', the CURRENT_CLASS_TYPE
6519 should not be `S'. */
6522 grokdeclarator (const cp_declarator *declarator,
6523 const cp_decl_specifier_seq *declspecs,
6524 enum decl_context decl_context,
6528 tree type = NULL_TREE;
6531 int virtualp, explicitp, friendp, inlinep, staticp;
6532 int explicit_int = 0;
6533 int explicit_char = 0;
6534 int defaulted_int = 0;
6535 tree dependant_name = NULL_TREE;
6537 tree typedef_decl = NULL_TREE;
6538 const char *name = NULL;
6539 tree typedef_type = NULL_TREE;
6540 int funcdef_flag = 0;
6541 cp_declarator_kind innermost_code = cdk_error;
6544 /* See the code below that used this. */
6545 tree decl_attr = NULL_TREE;
6548 /* Keep track of what sort of function is being processed
6549 so that we can warn about default return values, or explicit
6550 return values which do not match prescribed defaults. */
6551 special_function_kind sfk = sfk_none;
6553 tree dname = NULL_TREE;
6554 tree ctor_return_type = NULL_TREE;
6555 enum overload_flags flags = NO_SPECIAL;
6556 cp_cv_quals quals = TYPE_UNQUALIFIED;
6557 tree raises = NULL_TREE;
6558 int template_count = 0;
6559 tree returned_attrs = NULL_TREE;
6560 tree parms = NULL_TREE;
6561 const cp_declarator *id_declarator;
6562 /* The unqualified name of the declarator; either an
6563 IDENTIFIER_NODE, BIT_NOT_EXPR, or TEMPLATE_ID_EXPR. */
6564 tree unqualified_id;
6565 /* The class type, if any, in which this entity is located,
6566 or NULL_TREE if none. Note that this value may be different from
6567 the current class type; for example if an attempt is made to declare
6568 "A::f" inside "B", this value will be "A". */
6569 tree ctype = current_class_type;
6570 /* The NAMESPACE_DECL for the namespace in which this entity is
6571 located. If an unqualified name is used to declare the entity,
6572 this value will be NULL_TREE, even if the entity is located at
6574 tree in_namespace = NULL_TREE;
6576 cp_storage_class storage_class;
6577 bool unsigned_p, signed_p, short_p, long_p, thread_p;
6578 bool type_was_error_mark_node = false;
6580 signed_p = declspecs->specs[(int)ds_signed];
6581 unsigned_p = declspecs->specs[(int)ds_unsigned];
6582 short_p = declspecs->specs[(int)ds_short];
6583 long_p = declspecs->specs[(int)ds_long];
6584 thread_p = declspecs->specs[(int)ds_thread];
6586 if (decl_context == FUNCDEF)
6587 funcdef_flag = 1, decl_context = NORMAL;
6588 else if (decl_context == MEMFUNCDEF)
6589 funcdef_flag = -1, decl_context = FIELD;
6590 else if (decl_context == BITFIELD)
6591 bitfield = 1, decl_context = FIELD;
6593 /* Look inside a declarator for the name being declared
6594 and get it as a string, for an error message. */
6595 for (id_declarator = declarator;
6597 id_declarator = id_declarator->declarator)
6599 if (id_declarator->kind != cdk_id)
6600 innermost_code = id_declarator->kind;
6602 switch (id_declarator->kind)
6605 if (id_declarator->declarator
6606 && id_declarator->declarator->kind == cdk_id)
6608 sfk = id_declarator->declarator->u.id.sfk;
6609 if (sfk == sfk_destructor)
6616 tree decl = id_declarator->u.id.name;
6619 if (TREE_CODE (decl) == SCOPE_REF)
6621 tree qualifying_scope = TREE_OPERAND (decl, 0);
6623 /* It is valid to write:
6625 class C { void f(); };
6629 The standard is not clear about whether `typedef const C D' is
6630 legal; as of 2002-09-15 the committee is considering
6631 that question. EDG 3.0 allows that syntax.
6632 Therefore, we do as well. */
6633 if (qualifying_scope && TYPE_P (qualifying_scope))
6635 ctype = TYPE_MAIN_VARIANT (qualifying_scope);
6636 if (innermost_code != cdk_function
6637 && current_class_type
6638 && !UNIQUELY_DERIVED_FROM_P (ctype,
6639 current_class_type))
6641 error ("type %qT is not derived from type %qT",
6642 ctype, current_class_type);
6645 TREE_OPERAND (decl, 0) = ctype;
6647 else if (TREE_CODE (qualifying_scope) == NAMESPACE_DECL)
6648 in_namespace = qualifying_scope;
6649 decl = TREE_OPERAND (decl, 1);
6651 if (TREE_CODE (decl) == BASELINK)
6652 decl = BASELINK_FUNCTIONS (decl);
6653 if (decl == error_mark_node)
6654 return error_mark_node;
6655 switch (TREE_CODE (decl))
6659 tree type = TREE_OPERAND (decl, 0);
6660 type = constructor_name (type);
6661 name = IDENTIFIER_POINTER (type);
6665 case TEMPLATE_ID_EXPR:
6667 tree fns = TREE_OPERAND (decl, 0);
6670 if (TREE_CODE (dname) == COMPONENT_REF)
6671 dname = TREE_OPERAND (dname, 1);
6672 if (TREE_CODE (dname) != IDENTIFIER_NODE)
6674 gcc_assert (is_overloaded_fn (dname));
6675 dname = DECL_NAME (get_first_fn (dname));
6680 case IDENTIFIER_NODE:
6681 if (TREE_CODE (decl) == IDENTIFIER_NODE)
6684 if (C_IS_RESERVED_WORD (dname))
6686 error ("declarator-id missing; using reserved word %qD",
6688 name = IDENTIFIER_POINTER (dname);
6690 else if (!IDENTIFIER_TYPENAME_P (dname))
6691 name = IDENTIFIER_POINTER (dname);
6694 gcc_assert (flags == NO_SPECIAL);
6695 flags = TYPENAME_FLAG;
6696 ctor_return_type = TREE_TYPE (dname);
6697 sfk = sfk_conversion;
6698 if (is_typename_at_global_scope (dname))
6699 name = IDENTIFIER_POINTER (dname);
6701 name = "<invalid operator>";
6706 dname = constructor_name (TREE_TYPE (decl));
6707 name = IDENTIFIER_POINTER (dname);
6728 if (id_declarator->kind == cdk_id)
6732 /* A function definition's declarator must have the form of
6733 a function declarator. */
6735 if (funcdef_flag && innermost_code != cdk_function)
6738 if (((dname && IDENTIFIER_OPNAME_P (dname)) || flags == TYPENAME_FLAG)
6739 && innermost_code != cdk_function
6740 && ! (ctype && !declspecs->any_specifiers_p))
6742 error ("declaration of %qD as non-function", dname);
6743 return void_type_node;
6746 /* Anything declared one level down from the top level
6747 must be one of the parameters of a function
6748 (because the body is at least two levels down). */
6750 /* This heuristic cannot be applied to C++ nodes! Fixed, however,
6751 by not allowing C++ class definitions to specify their parameters
6752 with xdecls (must be spec.d in the parmlist).
6754 Since we now wait to push a class scope until we are sure that
6755 we are in a legitimate method context, we must set oldcname
6756 explicitly (since current_class_name is not yet alive).
6758 We also want to avoid calling this a PARM if it is in a namespace. */
6760 if (decl_context == NORMAL && !toplevel_bindings_p ())
6762 struct cp_binding_level *b = current_binding_level;
6763 current_binding_level = b->level_chain;
6764 if (current_binding_level != 0 && toplevel_bindings_p ())
6765 decl_context = PARM;
6766 current_binding_level = b;
6770 name = decl_context == PARM ? "parameter" : "type name";
6772 /* If there were multiple types specified in the decl-specifier-seq,
6773 issue an error message. */
6774 if (declspecs->multiple_types_p)
6775 error ("two or more data types in declaration of %qs", name);
6776 /* Extract the basic type from the decl-specifier-seq. */
6777 type = declspecs->type;
6778 if (type == error_mark_node)
6781 type_was_error_mark_node = true;
6783 /* If the entire declaration is itself tagged as deprecated then
6784 suppress reports of deprecated items. */
6785 if (type && TREE_DEPRECATED (type)
6786 && deprecated_state != DEPRECATED_SUPPRESS)
6787 warn_deprecated_use (type);
6788 if (type && TREE_CODE (type) == TYPE_DECL)
6790 typedef_decl = type;
6791 type = TREE_TYPE (typedef_decl);
6793 /* No type at all: default to `int', and set DEFAULTED_INT
6794 because it was not a user-defined typedef. */
6795 if (type == NULL_TREE && (signed_p || unsigned_p || long_p || short_p))
6797 /* These imply 'int'. */
6798 type = integer_type_node;
6802 explicit_int = declspecs->explicit_int_p;
6803 explicit_char = declspecs->explicit_char_p;
6805 /* Check for repeated decl-specifiers. */
6806 for (ds = ds_first; ds != ds_last; ++ds)
6808 unsigned count = declspecs->specs[(int)ds];
6811 /* The "long" specifier is a special case because of
6816 error ("%<long long long%> is too long for GCC");
6817 else if (pedantic && !in_system_header && warn_long_long)
6818 pedwarn ("ISO C++ does not support %<long long%>");
6822 else if (declspecs->specs[(int)ds] > 1)
6824 static const char *const decl_spec_names[] = {
6840 error ("duplicate %qs", decl_spec_names[(int)ds]);
6845 /* See the code below that used this. */
6847 decl_attr = DECL_ATTRIBUTES (typedef_decl);
6849 typedef_type = type;
6852 if (sfk != sfk_conversion)
6853 ctor_return_type = ctype;
6855 if (sfk != sfk_none)
6856 type = check_special_function_return_type (sfk, type,
6858 else if (type == NULL_TREE)
6864 /* We handle `main' specially here, because 'main () { }' is so
6865 common. With no options, it is allowed. With -Wreturn-type,
6866 it is a warning. It is only an error with -pedantic-errors. */
6867 is_main = (funcdef_flag
6868 && dname && MAIN_NAME_P (dname)
6869 && ctype == NULL_TREE
6870 && in_namespace == NULL_TREE
6871 && current_namespace == global_namespace);
6873 if (type_was_error_mark_node)
6874 /* We've already issued an error, don't complain more. */;
6875 else if (in_system_header || flag_ms_extensions)
6876 /* Allow it, sigh. */;
6877 else if (pedantic || ! is_main)
6878 pedwarn ("ISO C++ forbids declaration of %qs with no type", name);
6879 else if (warn_return_type)
6880 warning ("ISO C++ forbids declaration of %qs with no type", name);
6882 type = integer_type_node;
6887 /* Now process the modifiers that were specified
6888 and check for invalid combinations. */
6890 /* Long double is a special combination. */
6891 if (long_p && TYPE_MAIN_VARIANT (type) == double_type_node)
6894 type = build_qualified_type (long_double_type_node,
6895 cp_type_quals (type));
6898 /* Check all other uses of type modifiers. */
6900 if (unsigned_p || signed_p || long_p || short_p)
6904 if (TREE_CODE (type) == REAL_TYPE)
6905 error ("short, signed or unsigned invalid for %qs", name);
6906 else if (TREE_CODE (type) != INTEGER_TYPE)
6907 error ("long, short, signed or unsigned invalid for %qs", name);
6908 else if (long_p && short_p)
6909 error ("long and short specified together for %qs", name);
6910 else if ((long_p || short_p) && explicit_char)
6911 error ("long or short specified with char for %qs", name);
6912 else if ((long_p|| short_p) && TREE_CODE (type) == REAL_TYPE)
6913 error ("long or short specified with floating type for %qs", name);
6914 else if (signed_p && unsigned_p)
6915 error ("signed and unsigned given together for %qs", name);
6919 if (!explicit_int && !defaulted_int && !explicit_char && pedantic)
6921 pedwarn ("long, short, signed or unsigned used invalidly for %qs",
6923 if (flag_pedantic_errors)
6928 /* Discard the type modifiers if they are invalid. */
6939 /* Decide whether an integer type is signed or not.
6940 Optionally treat bitfields as signed by default. */
6944 It is implementation-defined whether a plain (neither
6945 explicitly signed or unsigned) char, short, int, or long
6946 bit-field is signed or unsigned.
6948 Naturally, we extend this to long long as well. Note that
6949 this does not include wchar_t. */
6950 || (bitfield && !flag_signed_bitfields
6952 /* A typedef for plain `int' without `signed' can be
6953 controlled just like plain `int', but a typedef for
6954 `signed int' cannot be so controlled. */
6956 && C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl))
6957 && (TREE_CODE (type) == INTEGER_TYPE
6958 || TREE_CODE (type) == CHAR_TYPE)
6959 && !same_type_p (TYPE_MAIN_VARIANT (type), wchar_type_node)))
6962 type = long_long_unsigned_type_node;
6964 type = long_unsigned_type_node;
6966 type = short_unsigned_type_node;
6967 else if (type == char_type_node)
6968 type = unsigned_char_type_node;
6969 else if (typedef_decl)
6970 type = c_common_unsigned_type (type);
6972 type = unsigned_type_node;
6974 else if (signed_p && type == char_type_node)
6975 type = signed_char_type_node;
6977 type = long_long_integer_type_node;
6979 type = long_integer_type_node;
6981 type = short_integer_type_node;
6983 if (declspecs->specs[(int)ds_complex])
6985 if (TREE_CODE (type) != INTEGER_TYPE && TREE_CODE (type) != REAL_TYPE)
6986 error ("complex invalid for %qs", name);
6987 /* If we just have "complex", it is equivalent to
6988 "complex double", but if any modifiers at all are specified it is
6989 the complex form of TYPE. E.g, "complex short" is
6990 "complex short int". */
6992 else if (defaulted_int && ! longlong
6993 && ! (long_p || short_p || signed_p || unsigned_p))
6994 type = complex_double_type_node;
6995 else if (type == integer_type_node)
6996 type = complex_integer_type_node;
6997 else if (type == float_type_node)
6998 type = complex_float_type_node;
6999 else if (type == double_type_node)
7000 type = complex_double_type_node;
7001 else if (type == long_double_type_node)
7002 type = complex_long_double_type_node;
7004 type = build_complex_type (type);
7007 type_quals = TYPE_UNQUALIFIED;
7008 if (declspecs->specs[(int)ds_const])
7009 type_quals |= TYPE_QUAL_CONST;
7010 if (declspecs->specs[(int)ds_volatile])
7011 type_quals |= TYPE_QUAL_VOLATILE;
7012 if (declspecs->specs[(int)ds_restrict])
7013 type_quals |= TYPE_QUAL_RESTRICT;
7014 if (sfk == sfk_conversion && type_quals != TYPE_UNQUALIFIED)
7015 error ("qualifiers are not allowed on declaration of %<operator %T%>",
7018 type_quals |= cp_type_quals (type);
7019 type = cp_build_qualified_type_real
7020 (type, type_quals, ((typedef_decl && !DECL_ARTIFICIAL (typedef_decl)
7021 ? tf_ignore_bad_quals : 0) | tf_error | tf_warning));
7022 /* We might have ignored or rejected some of the qualifiers. */
7023 type_quals = cp_type_quals (type);
7026 inlinep = !! declspecs->specs[(int)ds_inline];
7027 virtualp = !! declspecs->specs[(int)ds_virtual];
7028 explicitp = !! declspecs->specs[(int)ds_explicit];
7030 storage_class = declspecs->storage_class;
7031 if (storage_class == sc_static)
7032 staticp = 1 + (decl_context == FIELD);
7034 if (virtualp && staticp == 2)
7036 error ("member %qD cannot be declared both virtual and static", dname);
7039 friendp = !! declspecs->specs[(int)ds_friend];
7041 if (dependant_name && !friendp)
7043 error ("%<%T::%D%> is not a valid declarator", ctype, dependant_name);
7044 return void_type_node;
7047 /* Issue errors about use of storage classes for parameters. */
7048 if (decl_context == PARM)
7050 if (declspecs->specs[(int)ds_typedef])
7051 error ("typedef declaration invalid in parameter declaration");
7052 else if (storage_class == sc_static
7053 || storage_class == sc_extern
7055 error ("storage class specifiers invalid in parameter declarations");
7058 /* Give error if `virtual' is used outside of class declaration. */
7060 && (current_class_name == NULL_TREE || decl_context != FIELD))
7062 error ("virtual outside class declaration");
7066 /* Static anonymous unions are dealt with here. */
7067 if (staticp && decl_context == TYPENAME
7069 && ANON_AGGR_TYPE_P (declspecs->type))
7070 decl_context = FIELD;
7072 /* Warn about storage classes that are invalid for certain
7073 kinds of declarations (parameters, typenames, etc.). */
7074 if (declspecs->multiple_storage_classes_p)
7075 error ("multiple storage classes in declaration of %qs", name);
7078 && storage_class != sc_extern
7079 && storage_class != sc_static)
7080 || declspecs->specs[(int)ds_typedef]))
7082 error ("multiple storage classes in declaration of %qs", name);
7085 else if (decl_context != NORMAL
7086 && ((storage_class != sc_none
7087 && storage_class != sc_mutable)
7090 if ((decl_context == PARM || decl_context == CATCHPARM)
7091 && (storage_class == sc_register
7092 || storage_class == sc_auto))
7094 else if (declspecs->specs[(int)ds_typedef])
7096 else if (decl_context == FIELD
7097 /* C++ allows static class elements. */
7098 && storage_class == sc_static)
7099 /* C++ also allows inlines and signed and unsigned elements,
7100 but in those cases we don't come in here. */
7104 if (decl_context == FIELD)
7106 tree tmp = NULL_TREE;
7111 /* Avoid trying to get an operand off an identifier node. */
7112 if (declarator->kind != cdk_id)
7113 tmp = declarator->declarator->u.id.name;
7115 tmp = declarator->u.id.name;
7116 op = IDENTIFIER_OPNAME_P (tmp);
7117 if (IDENTIFIER_TYPENAME_P (tmp))
7119 if (is_typename_at_global_scope (tmp))
7120 name = IDENTIFIER_POINTER (tmp);
7122 name = "<invalid operator>";
7125 error ("storage class specified for %s %qs",
7126 op ? "member operator" : "field",
7131 if (decl_context == PARM || decl_context == CATCHPARM)
7132 error ("storage class specified for parameter %qs", name);
7134 error ("storage class specified for typename");
7136 if (storage_class == sc_register
7137 || storage_class == sc_auto
7138 || storage_class == sc_extern
7140 storage_class = sc_none;
7143 else if (storage_class == sc_extern && initialized
7146 if (toplevel_bindings_p ())
7148 /* It's common practice (and completely valid) to have a const
7149 be initialized and declared extern. */
7150 if (!(type_quals & TYPE_QUAL_CONST))
7151 warning ("%qs initialized and declared %<extern%>", name);
7154 error ("%qs has both %<extern%> and initializer", name);
7156 else if (storage_class == sc_extern && funcdef_flag
7157 && ! toplevel_bindings_p ())
7158 error ("nested function %qs declared %<extern%>", name);
7159 else if (toplevel_bindings_p ())
7161 if (storage_class == sc_auto)
7162 error ("top-level declaration of %qs specifies %<auto%>", name);
7165 && storage_class != sc_extern
7166 && storage_class != sc_static)
7168 error ("function-scope %qs implicitly auto and declared %<__thread%>",
7173 if (storage_class && friendp)
7174 error ("storage class specifiers invalid in friend function declarations");
7177 unqualified_id = NULL_TREE;
7180 unqualified_id = id_declarator->u.id.name;
7181 if (TREE_CODE (unqualified_id) == SCOPE_REF)
7182 unqualified_id = TREE_OPERAND (unqualified_id, 1);
7183 if (TREE_CODE (unqualified_id) == BASELINK)
7184 unqualified_id = BASELINK_FUNCTIONS (unqualified_id);
7185 switch (TREE_CODE (unqualified_id))
7189 = constructor_name (TREE_OPERAND (unqualified_id, 0));
7194 = constructor_name (TREE_TYPE (unqualified_id));
7197 case IDENTIFIER_NODE:
7198 case TEMPLATE_ID_EXPR:
7206 /* Determine the type of the entity declared by recurring on the
7209 declarator && declarator->kind != cdk_id;
7210 declarator = declarator->declarator)
7212 const cp_declarator *inner_declarator;
7215 if (type == error_mark_node)
7216 return error_mark_node;
7218 inner_declarator = declarator->declarator;
7220 attrs = declarator->attributes;
7226 if (declarator == NULL || declarator->kind == cdk_id)
7227 attr_flags |= (int) ATTR_FLAG_DECL_NEXT;
7228 if (declarator->kind == cdk_function)
7229 attr_flags |= (int) ATTR_FLAG_FUNCTION_NEXT;
7230 if (declarator->kind == cdk_array)
7231 attr_flags |= (int) ATTR_FLAG_ARRAY_NEXT;
7232 returned_attrs = decl_attributes (&type,
7233 chainon (returned_attrs, attrs),
7237 switch (declarator->kind)
7240 type = create_array_type_for_decl (dname, type,
7241 declarator->u.array.bounds);
7249 /* Declaring a function type.
7250 Make sure we have a valid type for the function to return. */
7252 /* We now know that the TYPE_QUALS don't apply to the
7253 decl, but to its return type. */
7254 type_quals = TYPE_UNQUALIFIED;
7256 /* Warn about some types functions can't return. */
7258 if (TREE_CODE (type) == FUNCTION_TYPE)
7260 error ("%qs declared as function returning a function", name);
7261 type = integer_type_node;
7263 if (TREE_CODE (type) == ARRAY_TYPE)
7265 error ("%qs declared as function returning an array", name);
7266 type = integer_type_node;
7269 /* Pick up type qualifiers which should be applied to `this'. */
7270 quals = declarator->u.function.qualifiers;
7272 /* Pick up the exception specifications. */
7273 raises = declarator->u.function.exception_specification;
7275 /* Say it's a definition only for the CALL_EXPR
7276 closest to the identifier. */
7277 funcdecl_p = inner_declarator && inner_declarator->kind == cdk_id;
7279 if (ctype == NULL_TREE
7280 && decl_context == FIELD
7282 && (friendp == 0 || dname == current_class_name))
7283 ctype = current_class_type;
7285 if (ctype && sfk == sfk_conversion)
7286 TYPE_HAS_CONVERSION (ctype) = 1;
7287 if (ctype && (sfk == sfk_constructor
7288 || sfk == sfk_destructor))
7290 /* We are within a class's scope. If our declarator name
7291 is the same as the class name, and we are defining
7292 a function, then it is a constructor/destructor, and
7293 therefore returns a void type. */
7295 if (flags == DTOR_FLAG)
7297 /* ISO C++ 12.4/2. A destructor may not be
7298 declared const or volatile. A destructor may
7301 error ("destructor cannot be static member function");
7304 error ("destructors may not be cv-qualified");
7305 quals = TYPE_UNQUALIFIED;
7307 if (decl_context == FIELD)
7309 if (! member_function_or_else (ctype,
7312 return void_type_node;
7315 else /* It's a constructor. */
7319 /* ISO C++ 12.1. A constructor may not be
7320 declared const or volatile. A constructor may
7321 not be virtual. A constructor may not be
7324 error ("constructor cannot be static member function");
7327 pedwarn ("constructors cannot be declared virtual");
7332 error ("constructors may not be cv-qualified");
7333 quals = TYPE_UNQUALIFIED;
7335 if (decl_context == FIELD)
7337 if (! member_function_or_else (ctype,
7340 return void_type_node;
7341 TYPE_HAS_CONSTRUCTOR (ctype) = 1;
7342 if (sfk != sfk_constructor)
7346 if (decl_context == FIELD)
7352 error ("can't initialize friend function %qs", name);
7355 /* Cannot be both friend and virtual. */
7356 error ("virtual functions cannot be friends");
7359 if (decl_context == NORMAL)
7360 error ("friend declaration not in class definition");
7361 if (current_function_decl && funcdef_flag)
7362 error ("can't define friend function %qs in a local "
7367 arg_types = grokparms (declarator->u.function.parameters,
7370 if (inner_declarator
7371 && inner_declarator->kind == cdk_id
7372 && inner_declarator->u.id.sfk == sfk_destructor
7373 && arg_types != void_list_node)
7375 error ("destructors may not have parameters");
7376 arg_types = void_list_node;
7380 type = build_function_type (type, arg_types);
7387 /* Filter out pointers-to-references and references-to-references.
7388 We can get these if a TYPE_DECL is used. */
7390 if (TREE_CODE (type) == REFERENCE_TYPE)
7392 error (declarator->kind == cdk_reference
7393 ? "cannot declare reference to %q#T"
7394 : "cannot declare pointer to %q#T", type);
7395 type = TREE_TYPE (type);
7397 else if (VOID_TYPE_P (type))
7399 if (declarator->kind == cdk_reference)
7400 error ("cannot declare reference to %q#T", type);
7401 else if (declarator->kind == cdk_ptrmem)
7402 error ("cannot declare pointer to %q#T member", type);
7405 /* We now know that the TYPE_QUALS don't apply to the decl,
7406 but to the target of the pointer. */
7407 type_quals = TYPE_UNQUALIFIED;
7409 if (declarator->kind == cdk_ptrmem
7410 && (TREE_CODE (type) == FUNCTION_TYPE
7411 || (quals && TREE_CODE (type) == METHOD_TYPE)))
7413 tree dummy = build_decl (TYPE_DECL, NULL_TREE, type);
7414 grok_method_quals (declarator->u.pointer.class_type,
7416 type = TREE_TYPE (dummy);
7417 quals = TYPE_UNQUALIFIED;
7420 if (declarator->kind == cdk_reference)
7422 if (!VOID_TYPE_P (type))
7423 type = build_reference_type (type);
7425 else if (TREE_CODE (type) == METHOD_TYPE)
7426 type = build_ptrmemfunc_type (build_pointer_type (type));
7427 else if (declarator->kind == cdk_ptrmem)
7429 /* We might have parsed a namespace as the class type. */
7430 if (TREE_CODE (declarator->u.pointer.class_type)
7433 error ("%qD is a namespace",
7434 declarator->u.pointer.class_type);
7435 type = build_pointer_type (type);
7438 type = build_ptrmem_type (declarator->u.pointer.class_type,
7442 type = build_pointer_type (type);
7444 /* Process a list of type modifier keywords (such as
7445 const or volatile) that were given inside the `*' or `&'. */
7447 if (declarator->u.pointer.qualifiers)
7450 = cp_build_qualified_type (type,
7451 declarator->u.pointer.qualifiers);
7452 type_quals = cp_type_quals (type);
7465 if (unqualified_id && TREE_CODE (unqualified_id) == TEMPLATE_ID_EXPR
7466 && TREE_CODE (type) != FUNCTION_TYPE
7467 && TREE_CODE (type) != METHOD_TYPE)
7469 error ("template-id %qD used as a declarator",
7471 unqualified_id = dname;
7474 /* If DECLARATOR is non-NULL, we know it is a cdk_id declarator;
7475 otherwise, we would not have exited the loop above. */
7477 && TREE_CODE (declarator->u.id.name) == SCOPE_REF
7478 /* If the qualifying scope was invalid, it will have been set to
7480 && TREE_OPERAND (declarator->u.id.name, 0)
7481 && TYPE_P (TREE_OPERAND (declarator->u.id.name, 0)))
7485 ctype = TREE_OPERAND (declarator->u.id.name, 0);
7487 ctype = TYPE_MAIN_VARIANT (ctype);
7489 while (t != NULL_TREE && CLASS_TYPE_P (t))
7491 /* You're supposed to have one `template <...>' for every
7492 template class, but you don't need one for a full
7493 specialization. For example:
7495 template <class T> struct S{};
7496 template <> struct S<int> { void f(); };
7497 void S<int>::f () {}
7499 is correct; there shouldn't be a `template <>' for the
7500 definition of `S<int>::f'. */
7501 if (CLASSTYPE_TEMPLATE_INFO (t)
7502 && (CLASSTYPE_TEMPLATE_INSTANTIATION (t)
7503 || uses_template_parms (CLASSTYPE_TI_ARGS (t)))
7504 && PRIMARY_TEMPLATE_P (CLASSTYPE_TI_TEMPLATE (t)))
7505 template_count += 1;
7507 t = TYPE_MAIN_DECL (t);
7508 t = DECL_CONTEXT (t);
7511 if (ctype == current_class_type)
7517 Is this ill-formed? */
7520 pedwarn ("extra qualification %<%T::%> on member %qs ignored",
7523 else if (TREE_CODE (type) == FUNCTION_TYPE)
7525 tree sname = TREE_OPERAND (declarator->u.id.name, 1);
7527 if (TREE_CODE (sname) == IDENTIFIER_NODE
7528 && NEW_DELETE_OPNAME_P (sname))
7529 /* Overloaded operator new and operator delete
7530 are always static functions. */
7532 else if (current_class_type == NULL_TREE || friendp)
7534 = build_method_type_directly (ctype,
7536 TYPE_ARG_TYPES (type));
7539 error ("cannot declare member function %<%T::%s%> within %<%T%>",
7540 ctype, name, current_class_type);
7541 return error_mark_node;
7544 else if (declspecs->specs[(int)ds_typedef]
7545 || COMPLETE_TYPE_P (complete_type (ctype)))
7547 /* Have to move this code elsewhere in this function.
7548 this code is used for i.e., typedef int A::M; M *pm;
7550 It is? How? jason 10/2/94 */
7552 if (current_class_type)
7554 error ("cannot declare member %<%T::%s%> within %qT",
7555 ctype, name, current_class_type);
7556 return void_type_node;
7561 cxx_incomplete_type_error (NULL_TREE, ctype);
7562 return error_mark_node;
7569 *attrlist = chainon (returned_attrs, *attrlist);
7571 attrlist = &returned_attrs;
7574 /* Now TYPE has the actual type. */
7576 /* Did array size calculations overflow? */
7578 if (TREE_CODE (type) == ARRAY_TYPE
7579 && COMPLETE_TYPE_P (type)
7580 && TREE_OVERFLOW (TYPE_SIZE (type)))
7582 error ("size of array %qs is too large", name);
7583 /* If we proceed with the array type as it is, we'll eventually
7584 crash in tree_low_cst(). */
7585 type = error_mark_node;
7588 if ((decl_context == FIELD || decl_context == PARM)
7589 && !processing_template_decl
7590 && variably_modified_type_p (type, NULL_TREE))
7592 if (decl_context == FIELD)
7593 error ("data member may not have variably modified type %qT", type);
7595 error ("parameter may not have variably modified type %qT", type);
7596 type = error_mark_node;
7599 if (explicitp == 1 || (explicitp && friendp))
7601 /* [dcl.fct.spec] The explicit specifier shall only be used in
7602 declarations of constructors within a class definition. */
7603 error ("only declarations of constructors can be %<explicit%>");
7607 if (storage_class == sc_mutable)
7609 if (decl_context != FIELD || friendp)
7611 error ("non-member %qs cannot be declared %<mutable%>", name);
7612 storage_class = sc_none;
7614 else if (decl_context == TYPENAME || declspecs->specs[(int)ds_typedef])
7616 error ("non-object member %qs cannot be declared %<mutable%>", name);
7617 storage_class = sc_none;
7619 else if (TREE_CODE (type) == FUNCTION_TYPE
7620 || TREE_CODE (type) == METHOD_TYPE)
7622 error ("function %qs cannot be declared %<mutable%>", name);
7623 storage_class = sc_none;
7627 error ("static %qs cannot be declared %<mutable%>", name);
7628 storage_class = sc_none;
7630 else if (type_quals & TYPE_QUAL_CONST)
7632 error ("const %qs cannot be declared %<mutable%>", name);
7633 storage_class = sc_none;
7637 /* If this is declaring a typedef name, return a TYPE_DECL. */
7638 if (declspecs->specs[(int)ds_typedef] && decl_context != TYPENAME)
7642 /* Note that the grammar rejects storage classes
7643 in typenames, fields or parameters. */
7644 if (current_lang_name == lang_name_java)
7645 TYPE_FOR_JAVA (type) = 1;
7647 if (decl_context == FIELD)
7649 if (constructor_name_p (unqualified_id, current_class_type))
7650 pedwarn ("ISO C++ forbids nested type %qD with same name "
7651 "as enclosing class",
7653 decl = build_lang_decl (TYPE_DECL, unqualified_id, type);
7657 decl = build_decl (TYPE_DECL, unqualified_id, type);
7658 if (in_namespace || ctype)
7659 error ("%Jtypedef name may not be a nested-name-specifier", decl);
7660 if (!current_function_decl)
7661 DECL_CONTEXT (decl) = FROB_CONTEXT (current_namespace);
7662 else if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (current_function_decl)
7663 || (DECL_MAYBE_IN_CHARGE_DESTRUCTOR_P
7664 (current_function_decl)))
7665 /* The TYPE_DECL is "abstract" because there will be
7666 clones of this constructor/destructor, and there will
7667 be copies of this TYPE_DECL generated in those
7669 DECL_ABSTRACT (decl) = 1;
7672 /* If the user declares "typedef struct {...} foo" then the
7673 struct will have an anonymous name. Fill that name in now.
7674 Nothing can refer to it, so nothing needs know about the name
7676 if (type != error_mark_node
7679 && TREE_CODE (TYPE_NAME (type)) == TYPE_DECL
7680 && TYPE_ANONYMOUS_P (type)
7681 /* Don't do this if there are attributes. */
7682 && (!attrlist || !*attrlist)
7683 && cp_type_quals (type) == TYPE_UNQUALIFIED)
7685 tree oldname = TYPE_NAME (type);
7688 /* Replace the anonymous name with the real name everywhere. */
7689 for (t = TYPE_MAIN_VARIANT (type); t; t = TYPE_NEXT_VARIANT (t))
7690 if (TYPE_NAME (t) == oldname)
7691 TYPE_NAME (t) = decl;
7693 if (TYPE_LANG_SPECIFIC (type))
7694 TYPE_WAS_ANONYMOUS (type) = 1;
7696 /* If this is a typedef within a template class, the nested
7697 type is a (non-primary) template. The name for the
7698 template needs updating as well. */
7699 if (TYPE_LANG_SPECIFIC (type) && CLASSTYPE_TEMPLATE_INFO (type))
7700 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type))
7701 = TYPE_IDENTIFIER (type);
7703 /* FIXME remangle member functions; member functions of a
7704 type with external linkage have external linkage. */
7709 if (ctype == NULL_TREE)
7711 if (TREE_CODE (type) != METHOD_TYPE)
7712 error ("%Jinvalid type qualifier for non-member function type",
7715 ctype = TYPE_METHOD_BASETYPE (type);
7717 if (ctype != NULL_TREE)
7718 grok_method_quals (ctype, decl, quals);
7722 || (typedef_decl && C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl)))
7723 C_TYPEDEF_EXPLICITLY_SIGNED (decl) = 1;
7725 bad_specifiers (decl, "type", virtualp, quals != TYPE_UNQUALIFIED,
7726 inlinep, friendp, raises != NULL_TREE);
7731 /* Detect the case of an array type of unspecified size
7732 which came, as such, direct from a typedef name.
7733 We must copy the type, so that the array's domain can be
7734 individually set by the object's initializer. */
7736 if (type && typedef_type
7737 && TREE_CODE (type) == ARRAY_TYPE && !TYPE_DOMAIN (type)
7738 && TYPE_MAIN_VARIANT (type) == TYPE_MAIN_VARIANT (typedef_type))
7739 type = build_cplus_array_type (TREE_TYPE (type), NULL_TREE);
7741 /* Detect where we're using a typedef of function type to declare a
7742 function. PARMS will not be set, so we must create it now. */
7744 if (type == typedef_type && TREE_CODE (type) == FUNCTION_TYPE)
7746 tree decls = NULL_TREE;
7749 for (args = TYPE_ARG_TYPES (type); args; args = TREE_CHAIN (args))
7751 tree decl = cp_build_parm_decl (NULL_TREE, TREE_VALUE (args));
7753 TREE_CHAIN (decl) = decls;
7757 parms = nreverse (decls);
7760 /* If this is a type name (such as, in a cast or sizeof),
7761 compute the type and return it now. */
7763 if (decl_context == TYPENAME)
7765 /* Note that the grammar rejects storage classes
7766 in typenames, fields or parameters. */
7767 if (type_quals != TYPE_UNQUALIFIED)
7768 type_quals = TYPE_UNQUALIFIED;
7770 /* Special case: "friend class foo" looks like a TYPENAME context. */
7773 if (type_quals != TYPE_UNQUALIFIED)
7775 error ("type qualifiers specified for friend class declaration");
7776 type_quals = TYPE_UNQUALIFIED;
7780 error ("%<inline%> specified for friend class declaration");
7786 /* Don't allow friend declaration without a class-key. */
7787 if (TREE_CODE (type) == TEMPLATE_TYPE_PARM)
7788 pedwarn ("template parameters cannot be friends");
7789 else if (TREE_CODE (type) == TYPENAME_TYPE)
7790 pedwarn ("friend declaration requires class-key, "
7791 "i.e. %<friend class %T::%D%>",
7792 TYPE_CONTEXT (type), TYPENAME_TYPE_FULLNAME (type));
7794 pedwarn ("friend declaration requires class-key, "
7795 "i.e. %<friend %#T%>",
7799 /* Only try to do this stuff if we didn't already give up. */
7800 if (type != integer_type_node)
7802 /* A friendly class? */
7803 if (current_class_type)
7804 make_friend_class (current_class_type, TYPE_MAIN_VARIANT (type),
7807 error ("trying to make class %qT a friend of global scope",
7810 type = void_type_node;
7815 if (ctype == NULL_TREE)
7817 if (TREE_CODE (type) != METHOD_TYPE)
7818 error ("invalid qualifiers on non-member function type");
7820 ctype = TYPE_METHOD_BASETYPE (type);
7824 tree dummy = build_decl (TYPE_DECL, unqualified_id, type);
7825 grok_method_quals (ctype, dummy, quals);
7826 type = TREE_TYPE (dummy);
7832 else if (unqualified_id == NULL_TREE && decl_context != PARM
7833 && decl_context != CATCHPARM
7834 && TREE_CODE (type) != UNION_TYPE
7837 error ("abstract declarator %qT used as declaration", type);
7838 return error_mark_node;
7841 /* Only functions may be declared using an operator-function-id. */
7843 && IDENTIFIER_OPNAME_P (unqualified_id)
7844 && TREE_CODE (type) != FUNCTION_TYPE
7845 && TREE_CODE (type) != METHOD_TYPE)
7847 error ("declaration of %qD as non-function", unqualified_id);
7848 return error_mark_node;
7851 /* We don't check parameter types here because we can emit a better
7852 error message later. */
7853 if (decl_context != PARM)
7854 type = check_var_type (unqualified_id, type);
7856 /* Now create the decl, which may be a VAR_DECL, a PARM_DECL
7857 or a FUNCTION_DECL, depending on DECL_CONTEXT and TYPE. */
7859 if (decl_context == PARM || decl_context == CATCHPARM)
7861 if (ctype || in_namespace)
7862 error ("cannot use %<::%> in parameter declaration");
7864 /* A parameter declared as an array of T is really a pointer to T.
7865 One declared as a function is really a pointer to a function.
7866 One declared as a member is really a pointer to member. */
7868 if (TREE_CODE (type) == ARRAY_TYPE)
7870 /* Transfer const-ness of array into that of type pointed to. */
7871 type = build_pointer_type (TREE_TYPE (type));
7872 type_quals = TYPE_UNQUALIFIED;
7874 else if (TREE_CODE (type) == FUNCTION_TYPE)
7875 type = build_pointer_type (type);
7881 if (decl_context == PARM)
7883 decl = cp_build_parm_decl (unqualified_id, type);
7885 bad_specifiers (decl, "parameter", virtualp, quals != TYPE_UNQUALIFIED,
7886 inlinep, friendp, raises != NULL_TREE);
7888 else if (decl_context == FIELD)
7890 /* The C99 flexible array extension. */
7891 if (!staticp && TREE_CODE (type) == ARRAY_TYPE
7892 && TYPE_DOMAIN (type) == NULL_TREE)
7894 tree itype = compute_array_index_type (dname, integer_zero_node);
7895 type = build_cplus_array_type (TREE_TYPE (type), itype);
7898 if (type == error_mark_node)
7900 /* Happens when declaring arrays of sizes which
7901 are error_mark_node, for example. */
7904 else if (in_namespace && !friendp)
7906 /* Something like struct S { int N::j; }; */
7907 error ("invalid use of %<::%>");
7910 else if (TREE_CODE (type) == FUNCTION_TYPE)
7913 tree function_context;
7915 /* We catch the others as conflicts with the builtin
7917 if (friendp && unqualified_id == ridpointers[(int) RID_SIGNED])
7919 error ("function %qD cannot be declared friend",
7926 if (ctype == NULL_TREE)
7927 ctype = current_class_type;
7929 if (ctype == NULL_TREE)
7931 error ("can't make %qD into a method -- not in a class",
7933 return void_type_node;
7936 /* ``A union may [ ... ] not [ have ] virtual functions.''
7938 if (virtualp && TREE_CODE (ctype) == UNION_TYPE)
7940 error ("function %qD declared virtual inside a union",
7942 return void_type_node;
7945 if (NEW_DELETE_OPNAME_P (unqualified_id))
7949 error ("%qD cannot be declared virtual, since it "
7955 else if (staticp < 2)
7956 type = build_method_type_directly (ctype,
7958 TYPE_ARG_TYPES (type));
7961 /* Tell grokfndecl if it needs to set TREE_PUBLIC on the node. */
7962 function_context = (ctype != NULL_TREE) ?
7963 decl_function_context (TYPE_MAIN_DECL (ctype)) : NULL_TREE;
7964 publicp = (! friendp || ! staticp)
7965 && function_context == NULL_TREE;
7966 decl = grokfndecl (ctype, type,
7967 TREE_CODE (unqualified_id) != TEMPLATE_ID_EXPR
7968 ? unqualified_id : dname,
7971 virtualp, flags, quals, raises,
7972 friendp ? -1 : 0, friendp, publicp, inlinep,
7973 funcdef_flag, template_count, in_namespace, attrlist);
7974 if (decl == NULL_TREE)
7977 /* This clobbers the attrs stored in `decl' from `attrlist'. */
7978 /* The decl and setting of decl_attr is also turned off. */
7979 decl = build_decl_attribute_variant (decl, decl_attr);
7982 /* [class.conv.ctor]
7984 A constructor declared without the function-specifier
7985 explicit that can be called with a single parameter
7986 specifies a conversion from the type of its first
7987 parameter to the type of its class. Such a constructor
7988 is called a converting constructor. */
7990 DECL_NONCONVERTING_P (decl) = 1;
7991 else if (DECL_CONSTRUCTOR_P (decl))
7993 /* The constructor can be called with exactly one
7994 parameter if there is at least one parameter, and
7995 any subsequent parameters have default arguments.
7996 Ignore any compiler-added parms. */
7997 tree arg_types = FUNCTION_FIRST_USER_PARMTYPE (decl);
7999 if (arg_types == void_list_node
8001 && TREE_CHAIN (arg_types)
8002 && TREE_CHAIN (arg_types) != void_list_node
8003 && !TREE_PURPOSE (TREE_CHAIN (arg_types))))
8004 DECL_NONCONVERTING_P (decl) = 1;
8007 else if (TREE_CODE (type) == METHOD_TYPE)
8009 /* We only get here for friend declarations of
8010 members of other classes. */
8011 /* All method decls are public, so tell grokfndecl to set
8012 TREE_PUBLIC, also. */
8013 decl = grokfndecl (ctype, type,
8014 TREE_CODE (unqualified_id) != TEMPLATE_ID_EXPR
8015 ? unqualified_id : dname,
8018 virtualp, flags, quals, raises,
8019 friendp ? -1 : 0, friendp, 1, 0, funcdef_flag,
8020 template_count, in_namespace, attrlist);
8021 if (decl == NULL_TREE)
8024 else if (!staticp && !dependent_type_p (type)
8025 && !COMPLETE_TYPE_P (complete_type (type))
8026 && (TREE_CODE (type) != ARRAY_TYPE || initialized == 0))
8029 error ("field %qD has incomplete type", unqualified_id);
8031 error ("name %qT has incomplete type", type);
8033 /* If we're instantiating a template, tell them which
8034 instantiation made the field's type be incomplete. */
8035 if (current_class_type
8036 && TYPE_NAME (current_class_type)
8037 && IDENTIFIER_TEMPLATE (TYPE_IDENTIFIER (current_class_type))
8039 && declspecs->type == type)
8040 error (" in instantiation of template %qT",
8041 current_class_type);
8043 type = error_mark_node;
8050 error ("%qE is neither function nor member function; "
8051 "cannot be declared friend", unqualified_id);
8059 /* Friends are treated specially. */
8060 if (ctype == current_class_type)
8061 warning ("member functions are implicitly friends of their class");
8062 else if (decl && DECL_NAME (decl))
8064 if (template_class_depth (current_class_type) == 0)
8066 decl = check_explicit_specialization
8067 (unqualified_id, decl, template_count,
8068 2 * (funcdef_flag != 0) + 4);
8069 if (decl == error_mark_node)
8070 return error_mark_node;
8073 decl = do_friend (ctype, unqualified_id, decl,
8074 *attrlist, flags, quals, funcdef_flag);
8078 return void_type_node;
8081 /* Structure field. It may not be a function, except for C++. */
8083 if (decl == NULL_TREE)
8089 /* An attempt is being made to initialize a non-static
8090 member. But, from [class.mem]:
8092 4 A member-declarator can contain a
8093 constant-initializer only if it declares a static
8094 member (_class.static_) of integral or enumeration
8095 type, see _class.static.data_.
8097 This used to be relatively common practice, but
8098 the rest of the compiler does not correctly
8099 handle the initialization unless the member is
8100 static so we make it static below. */
8101 pedwarn ("ISO C++ forbids initialization of member %qD",
8103 pedwarn ("making %qD static", unqualified_id);
8107 if (uses_template_parms (type))
8108 /* We'll check at instantiation time. */
8110 else if (check_static_variable_definition (unqualified_id,
8112 /* If we just return the declaration, crashes
8113 will sometimes occur. We therefore return
8114 void_type_node, as if this was a friend
8115 declaration, to cause callers to completely
8116 ignore this declaration. */
8117 return void_type_node;
8122 /* C++ allows static class members. All other work
8123 for this is done by grokfield. */
8124 decl = build_lang_decl (VAR_DECL, unqualified_id, type);
8125 set_linkage_for_static_data_member (decl);
8126 /* Even if there is an in-class initialization, DECL
8127 is considered undefined until an out-of-class
8128 definition is provided. */
8129 DECL_EXTERNAL (decl) = 1;
8133 decl = build_decl (FIELD_DECL, unqualified_id, type);
8134 DECL_NONADDRESSABLE_P (decl) = bitfield;
8135 if (storage_class == sc_mutable)
8137 DECL_MUTABLE_P (decl) = 1;
8138 storage_class = sc_none;
8142 bad_specifiers (decl, "field", virtualp, quals != TYPE_UNQUALIFIED,
8143 inlinep, friendp, raises != NULL_TREE);
8146 else if (TREE_CODE (type) == FUNCTION_TYPE
8147 || TREE_CODE (type) == METHOD_TYPE)
8152 if (!unqualified_id)
8155 if (TREE_CODE (unqualified_id) == TEMPLATE_ID_EXPR)
8156 original_name = dname;
8158 original_name = unqualified_id;
8160 if (storage_class == sc_auto)
8161 error ("storage class %<auto%> invalid for function %qs", name);
8162 else if (storage_class == sc_register)
8163 error ("storage class %<register%> invalid for function %qs", name);
8165 error ("storage class %<__thread%> invalid for function %qs", name);
8167 /* Function declaration not at top level.
8168 Storage classes other than `extern' are not allowed
8169 and `extern' makes no difference. */
8170 if (! toplevel_bindings_p ()
8171 && (storage_class == sc_static
8172 || declspecs->specs[(int)ds_inline])
8175 if (storage_class == sc_static)
8176 pedwarn ("%<static%> specified invalid for function %qs "
8177 "declared out of global scope", name);
8179 pedwarn ("%<inline%> specifier invalid for function %qs "
8180 "declared out of global scope", name);
8183 if (ctype == NULL_TREE)
8187 error ("virtual non-class function %qs", name);
8191 else if (TREE_CODE (type) == FUNCTION_TYPE && staticp < 2
8192 && !NEW_DELETE_OPNAME_P (original_name))
8193 type = build_method_type_directly (ctype,
8195 TYPE_ARG_TYPES (type));
8197 /* Record presence of `static'. */
8198 publicp = (ctype != NULL_TREE
8199 || storage_class == sc_extern
8200 || storage_class != sc_static);
8202 decl = grokfndecl (ctype, type, original_name, parms, unqualified_id,
8203 virtualp, flags, quals, raises,
8205 publicp, inlinep, funcdef_flag,
8206 template_count, in_namespace, attrlist);
8207 if (decl == NULL_TREE)
8212 int invalid_static = 0;
8214 /* Don't allow a static member function in a class, and forbid
8215 declaring main to be static. */
8216 if (TREE_CODE (type) == METHOD_TYPE)
8218 pedwarn ("cannot declare member function %qD to have "
8219 "static linkage", decl);
8222 else if (current_function_decl)
8224 /* FIXME need arm citation */
8225 error ("cannot declare static function inside another function");
8232 storage_class = sc_none;
8238 /* It's a variable. */
8240 /* An uninitialized decl with `extern' is a reference. */
8241 decl = grokvardecl (type, unqualified_id,
8244 (type_quals & TYPE_QUAL_CONST) != 0,
8245 ctype ? ctype : in_namespace);
8246 bad_specifiers (decl, "variable", virtualp, quals != TYPE_UNQUALIFIED,
8247 inlinep, friendp, raises != NULL_TREE);
8251 DECL_CONTEXT (decl) = ctype;
8254 pedwarn ("%<static%> may not be used when defining "
8255 "(as opposed to declaring) a static data member");
8257 storage_class = sc_none;
8259 if (storage_class == sc_register && TREE_STATIC (decl))
8261 error ("static member %qD declared %<register%>", decl);
8262 storage_class = sc_none;
8264 if (storage_class == sc_extern && pedantic)
8266 pedwarn ("cannot explicitly declare member %q#D to have "
8269 storage_class = sc_none;
8274 /* Record `register' declaration for warnings on &
8275 and in case doing stupid register allocation. */
8277 if (storage_class == sc_register)
8278 DECL_REGISTER (decl) = 1;
8279 else if (storage_class == sc_extern)
8280 DECL_THIS_EXTERN (decl) = 1;
8281 else if (storage_class == sc_static)
8282 DECL_THIS_STATIC (decl) = 1;
8284 /* Record constancy and volatility. There's no need to do this
8285 when processing a template; we'll do this for the instantiated
8286 declaration based on the type of DECL. */
8287 if (!processing_template_decl)
8288 c_apply_type_quals_to_decl (type_quals, decl);
8294 /* Subroutine of start_function. Ensure that each of the parameter
8295 types (as listed in PARMS) is complete, as is required for a
8296 function definition. */
8299 require_complete_types_for_parms (tree parms)
8301 for (; parms; parms = TREE_CHAIN (parms))
8303 if (dependent_type_p (TREE_TYPE (parms)))
8305 if (VOID_TYPE_P (TREE_TYPE (parms)))
8306 /* grokparms will have already issued an error. */
8307 TREE_TYPE (parms) = error_mark_node;
8308 else if (complete_type_or_else (TREE_TYPE (parms), parms))
8310 layout_decl (parms, 0);
8311 DECL_ARG_TYPE (parms) = type_passed_as (TREE_TYPE (parms));
8316 /* Returns nonzero if T is a local variable. */
8319 local_variable_p (tree t)
8321 if ((TREE_CODE (t) == VAR_DECL
8322 /* A VAR_DECL with a context that is a _TYPE is a static data
8324 && !TYPE_P (CP_DECL_CONTEXT (t))
8325 /* Any other non-local variable must be at namespace scope. */
8326 && !DECL_NAMESPACE_SCOPE_P (t))
8327 || (TREE_CODE (t) == PARM_DECL))
8333 /* Returns nonzero if T is an automatic local variable or a label.
8334 (These are the declarations that need to be remapped when the code
8335 containing them is duplicated.) */
8338 nonstatic_local_decl_p (tree t)
8340 return ((local_variable_p (t) && !TREE_STATIC (t))
8341 || TREE_CODE (t) == LABEL_DECL
8342 || TREE_CODE (t) == RESULT_DECL);
8345 /* Like local_variable_p, but suitable for use as a tree-walking
8349 local_variable_p_walkfn (tree *tp, int *walk_subtrees,
8350 void *data ATTRIBUTE_UNUSED)
8352 if (local_variable_p (*tp) && !DECL_ARTIFICIAL (*tp))
8354 else if (TYPE_P (*tp))
8361 /* Check that ARG, which is a default-argument expression for a
8362 parameter DECL, is valid. Returns ARG, or ERROR_MARK_NODE, if
8363 something goes wrong. DECL may also be a _TYPE node, rather than a
8364 DECL, if there is no DECL available. */
8367 check_default_argument (tree decl, tree arg)
8372 if (TREE_CODE (arg) == DEFAULT_ARG)
8373 /* We get a DEFAULT_ARG when looking at an in-class declaration
8374 with a default argument. Ignore the argument for now; we'll
8375 deal with it after the class is complete. */
8378 if (processing_template_decl || uses_template_parms (arg))
8379 /* We don't do anything checking until instantiation-time. Note
8380 that there may be uninstantiated arguments even for an
8381 instantiated function, since default arguments are not
8382 instantiated until they are needed. */
8391 decl_type = TREE_TYPE (decl);
8393 if (arg == error_mark_node
8394 || decl == error_mark_node
8395 || TREE_TYPE (arg) == error_mark_node
8396 || decl_type == error_mark_node)
8397 /* Something already went wrong. There's no need to check
8399 return error_mark_node;
8401 /* [dcl.fct.default]
8403 A default argument expression is implicitly converted to the
8405 if (!TREE_TYPE (arg)
8406 || !can_convert_arg (decl_type, TREE_TYPE (arg), arg))
8409 error ("default argument for %q#D has type %qT",
8410 decl, TREE_TYPE (arg));
8412 error ("default argument for parameter of type %qT has type %qT",
8413 decl_type, TREE_TYPE (arg));
8415 return error_mark_node;
8418 /* [dcl.fct.default]
8420 Local variables shall not be used in default argument
8423 The keyword `this' shall not be used in a default argument of a
8425 var = walk_tree_without_duplicates (&arg, local_variable_p_walkfn,
8429 error ("default argument %qE uses local variable %qD", arg, var);
8430 return error_mark_node;
8437 /* Decode the list of parameter types for a function type.
8438 Given the list of things declared inside the parens,
8439 return a list of types.
8441 If this parameter does not end with an ellipsis, we append
8444 *PARMS is set to the chain of PARM_DECLs created. */
8447 grokparms (cp_parameter_declarator *first_parm, tree *parms)
8449 tree result = NULL_TREE;
8450 tree decls = NULL_TREE;
8451 int ellipsis = !first_parm || first_parm->ellipsis_p;
8452 cp_parameter_declarator *parm;
8455 for (parm = first_parm; parm != NULL; parm = parm->next)
8457 tree type = NULL_TREE;
8458 tree init = parm->default_argument;
8462 if (parm == no_parameters)
8465 attrs = parm->decl_specifiers.attributes;
8466 parm->decl_specifiers.attributes = NULL_TREE;
8467 decl = grokdeclarator (parm->declarator, &parm->decl_specifiers,
8468 PARM, init != NULL_TREE, &attrs);
8469 if (! decl || TREE_TYPE (decl) == error_mark_node)
8473 cplus_decl_attributes (&decl, attrs, 0);
8475 type = TREE_TYPE (decl);
8476 if (VOID_TYPE_P (type))
8478 if (same_type_p (type, void_type_node)
8479 && !DECL_NAME (decl) && !result && !parm->next && !ellipsis)
8480 /* this is a parmlist of `(void)', which is ok. */
8482 cxx_incomplete_type_error (decl, type);
8483 /* It's not a good idea to actually create parameters of
8484 type `void'; other parts of the compiler assume that a
8485 void type terminates the parameter list. */
8486 type = error_mark_node;
8487 TREE_TYPE (decl) = error_mark_node;
8490 if (type != error_mark_node)
8492 /* Top-level qualifiers on the parameters are
8493 ignored for function types. */
8494 type = cp_build_qualified_type (type, 0);
8495 if (TREE_CODE (type) == METHOD_TYPE)
8497 error ("parameter %qD invalidly declared method type", decl);
8498 type = build_pointer_type (type);
8499 TREE_TYPE (decl) = type;
8501 else if (abstract_virtuals_error (decl, type))
8502 any_error = 1; /* Seems like a good idea. */
8503 else if (POINTER_TYPE_P (type))
8505 /* [dcl.fct]/6, parameter types cannot contain pointers
8506 (references) to arrays of unknown bound. */
8507 tree t = TREE_TYPE (type);
8508 int ptr = TYPE_PTR_P (type);
8514 else if (TREE_CODE (t) != ARRAY_TYPE)
8516 else if (!TYPE_DOMAIN (t))
8520 if (TREE_CODE (t) == ARRAY_TYPE)
8521 error ("parameter %qD includes %s to array of unknown "
8523 decl, ptr ? "pointer" : "reference", t);
8526 if (!any_error && init)
8527 init = check_default_argument (decl, init);
8532 TREE_CHAIN (decl) = decls;
8534 result = tree_cons (init, type, result);
8536 decls = nreverse (decls);
8537 result = nreverse (result);
8539 result = chainon (result, void_list_node);
8546 /* D is a constructor or overloaded `operator='.
8548 Let T be the class in which D is declared. Then, this function
8551 -1 if D's is an ill-formed constructor or copy assignment operator
8552 whose first parameter is of type `T'.
8553 0 if D is not a copy constructor or copy assignment
8555 1 if D is a copy constructor or copy assignment operator whose
8556 first parameter is a reference to const qualified T.
8557 2 if D is a copy constructor or copy assignment operator whose
8558 first parameter is a reference to non-const qualified T.
8560 This function can be used as a predicate. Positive values indicate
8561 a copy constructor and nonzero values indicate a copy assignment
8571 gcc_assert (DECL_FUNCTION_MEMBER_P (d));
8573 if (DECL_TEMPLATE_INFO (d)
8574 && DECL_MEMBER_TEMPLATE_P (DECL_TI_TEMPLATE (d)))
8575 /* Instantiations of template member functions are never copy
8576 functions. Note that member functions of templated classes are
8577 represented as template functions internally, and we must
8578 accept those as copy functions. */
8581 args = FUNCTION_FIRST_USER_PARMTYPE (d);
8585 arg_type = TREE_VALUE (args);
8587 if (TYPE_MAIN_VARIANT (arg_type) == DECL_CONTEXT (d))
8589 /* Pass by value copy assignment operator. */
8592 else if (TREE_CODE (arg_type) == REFERENCE_TYPE
8593 && TYPE_MAIN_VARIANT (TREE_TYPE (arg_type)) == DECL_CONTEXT (d))
8595 if (CP_TYPE_CONST_P (TREE_TYPE (arg_type)))
8601 args = TREE_CHAIN (args);
8603 if (args && args != void_list_node && !TREE_PURPOSE (args))
8604 /* There are more non-optional args. */
8610 /* Remember any special properties of member function DECL. */
8612 void grok_special_member_properties (tree decl)
8614 if (!DECL_NONSTATIC_MEMBER_FUNCTION_P(decl))
8615 ; /* Not special. */
8616 else if (DECL_CONSTRUCTOR_P (decl))
8618 int ctor = copy_fn_p (decl);
8624 A non-template constructor for class X is a copy
8625 constructor if its first parameter is of type X&, const
8626 X&, volatile X& or const volatile X&, and either there
8627 are no other parameters or else all other parameters have
8628 default arguments. */
8629 TYPE_HAS_INIT_REF (DECL_CONTEXT (decl)) = 1;
8631 TYPE_HAS_CONST_INIT_REF (DECL_CONTEXT (decl)) = 1;
8633 else if (sufficient_parms_p (FUNCTION_FIRST_USER_PARMTYPE (decl)))
8634 TYPE_HAS_DEFAULT_CONSTRUCTOR (DECL_CONTEXT (decl)) = 1;
8636 else if (DECL_OVERLOADED_OPERATOR_P (decl) == NOP_EXPR)
8640 A non-template assignment operator for class X is a copy
8641 assignment operator if its parameter is of type X, X&, const
8642 X&, volatile X& or const volatile X&. */
8644 int assop = copy_fn_p (decl);
8648 TYPE_HAS_ASSIGN_REF (DECL_CONTEXT (decl)) = 1;
8650 TYPE_HAS_CONST_ASSIGN_REF (DECL_CONTEXT (decl)) = 1;
8655 /* Check a constructor DECL has the correct form. Complains
8656 if the class has a constructor of the form X(X). */
8659 grok_ctor_properties (tree ctype, tree decl)
8661 int ctor_parm = copy_fn_p (decl);
8667 A declaration of a constructor for a class X is ill-formed if
8668 its first parameter is of type (optionally cv-qualified) X
8669 and either there are no other parameters or else all other
8670 parameters have default arguments.
8672 We *don't* complain about member template instantiations that
8673 have this form, though; they can occur as we try to decide
8674 what constructor to use during overload resolution. Since
8675 overload resolution will never prefer such a constructor to
8676 the non-template copy constructor (which is either explicitly
8677 or implicitly defined), there's no need to worry about their
8678 existence. Theoretically, they should never even be
8679 instantiated, but that's hard to forestall. */
8680 error ("invalid constructor; you probably meant %<%T (const %T&)%>",
8688 /* An operator with this code is unary, but can also be binary. */
8691 ambi_op_p (enum tree_code code)
8693 return (code == INDIRECT_REF
8694 || code == ADDR_EXPR
8695 || code == CONVERT_EXPR
8696 || code == NEGATE_EXPR
8697 || code == PREINCREMENT_EXPR
8698 || code == PREDECREMENT_EXPR);
8701 /* An operator with this name can only be unary. */
8704 unary_op_p (enum tree_code code)
8706 return (code == TRUTH_NOT_EXPR
8707 || code == BIT_NOT_EXPR
8708 || code == COMPONENT_REF
8709 || code == TYPE_EXPR);
8712 /* DECL is a declaration for an overloaded operator. Returns true if
8713 the declaration is valid; false otherwise. If COMPLAIN is true,
8714 errors are issued for invalid declarations. */
8717 grok_op_properties (tree decl, int friendp, bool complain)
8719 tree argtypes = TYPE_ARG_TYPES (TREE_TYPE (decl));
8721 int methodp = (TREE_CODE (TREE_TYPE (decl)) == METHOD_TYPE);
8722 tree name = DECL_NAME (decl);
8723 enum tree_code operator_code;
8727 /* Assume that the declaration is valid. */
8730 /* Count the number of arguments. */
8731 for (argtype = argtypes, arity = 0;
8732 argtype && argtype != void_list_node;
8733 argtype = TREE_CHAIN (argtype))
8736 if (current_class_type == NULL_TREE)
8739 if (DECL_CONV_FN_P (decl))
8740 operator_code = TYPE_EXPR;
8744 #define DEF_OPERATOR(NAME, CODE, MANGLING, ARITY, ASSN_P) \
8745 if (ansi_opname (CODE) == name) \
8747 operator_code = (CODE); \
8750 else if (ansi_assopname (CODE) == name) \
8752 operator_code = (CODE); \
8753 DECL_ASSIGNMENT_OPERATOR_P (decl) = 1; \
8757 #include "operators.def"
8763 gcc_assert (operator_code != LAST_CPLUS_TREE_CODE);
8764 SET_OVERLOADED_OPERATOR_CODE (decl, operator_code);
8768 switch (operator_code)
8771 TYPE_HAS_NEW_OPERATOR (current_class_type) = 1;
8775 TYPE_GETS_DELETE (current_class_type) |= 1;
8779 TYPE_HAS_ARRAY_NEW_OPERATOR (current_class_type) = 1;
8782 case VEC_DELETE_EXPR:
8783 TYPE_GETS_DELETE (current_class_type) |= 2;
8791 /* [basic.std.dynamic.allocation]/1:
8793 A program is ill-formed if an allocation function is declared
8794 in a namespace scope other than global scope or declared static
8797 The same also holds true for deallocation functions. */
8798 if (operator_code == NEW_EXPR || operator_code == VEC_NEW_EXPR
8799 || operator_code == DELETE_EXPR || operator_code == VEC_DELETE_EXPR)
8801 if (DECL_NAMESPACE_SCOPE_P (decl))
8803 if (CP_DECL_CONTEXT (decl) != global_namespace)
8804 error ("%qD may not be declared within a namespace", decl);
8805 else if (!TREE_PUBLIC (decl))
8806 error ("%qD may not be declared as static", decl);
8810 if (operator_code == NEW_EXPR || operator_code == VEC_NEW_EXPR)
8811 TREE_TYPE (decl) = coerce_new_type (TREE_TYPE (decl));
8812 else if (operator_code == DELETE_EXPR || operator_code == VEC_DELETE_EXPR)
8813 TREE_TYPE (decl) = coerce_delete_type (TREE_TYPE (decl));
8816 /* An operator function must either be a non-static member function
8817 or have at least one parameter of a class, a reference to a class,
8818 an enumeration, or a reference to an enumeration. 13.4.0.6 */
8819 if (! methodp || DECL_STATIC_FUNCTION_P (decl))
8821 if (operator_code == TYPE_EXPR
8822 || operator_code == CALL_EXPR
8823 || operator_code == COMPONENT_REF
8824 || operator_code == ARRAY_REF
8825 || operator_code == NOP_EXPR)
8826 error ("%qD must be a nonstatic member function", decl);
8831 if (DECL_STATIC_FUNCTION_P (decl))
8832 error ("%qD must be either a non-static member "
8833 "function or a non-member function", decl);
8835 for (p = argtypes; p && p != void_list_node; p = TREE_CHAIN (p))
8837 tree arg = non_reference (TREE_VALUE (p));
8838 /* IS_AGGR_TYPE, rather than CLASS_TYPE_P, is used
8839 because these checks are performed even on
8840 template functions. */
8841 if (IS_AGGR_TYPE (arg) || TREE_CODE (arg) == ENUMERAL_TYPE)
8845 if (!p || p == void_list_node)
8850 error ("%qD must have an argument of class or "
8858 /* There are no restrictions on the arguments to an overloaded
8860 if (operator_code == CALL_EXPR)
8863 if (IDENTIFIER_TYPENAME_P (name) && ! DECL_TEMPLATE_INFO (decl))
8865 tree t = TREE_TYPE (name);
8868 int ref = (TREE_CODE (t) == REFERENCE_TYPE);
8869 const char *what = 0;
8872 t = TYPE_MAIN_VARIANT (TREE_TYPE (t));
8874 if (TREE_CODE (t) == VOID_TYPE)
8876 else if (t == current_class_type)
8877 what = "the same type";
8878 /* Don't force t to be complete here. */
8879 else if (IS_AGGR_TYPE (t)
8880 && COMPLETE_TYPE_P (t)
8881 && DERIVED_FROM_P (t, current_class_type))
8882 what = "a base class";
8884 if (what && warn_conversion)
8885 warning ("conversion to %s%s will never use a type "
8886 "conversion operator",
8887 ref ? "a reference to " : "", what);
8890 if (operator_code == COND_EXPR)
8893 error ("ISO C++ prohibits overloading operator ?:");
8895 else if (ambi_op_p (operator_code))
8898 /* We pick the one-argument operator codes by default, so
8899 we don't have to change anything. */
8901 else if (arity == 2)
8903 /* If we thought this was a unary operator, we now know
8904 it to be a binary operator. */
8905 switch (operator_code)
8908 operator_code = MULT_EXPR;
8912 operator_code = BIT_AND_EXPR;
8916 operator_code = PLUS_EXPR;
8920 operator_code = MINUS_EXPR;
8923 case PREINCREMENT_EXPR:
8924 operator_code = POSTINCREMENT_EXPR;
8927 case PREDECREMENT_EXPR:
8928 operator_code = POSTDECREMENT_EXPR;
8935 SET_OVERLOADED_OPERATOR_CODE (decl, operator_code);
8937 if ((operator_code == POSTINCREMENT_EXPR
8938 || operator_code == POSTDECREMENT_EXPR)
8939 && ! processing_template_decl
8940 && ! same_type_p (TREE_VALUE (TREE_CHAIN (argtypes)), integer_type_node))
8943 error ("postfix %qD must take %<int%> as its argument",
8947 ("postfix %qD must take %<int%> as its second argument",
8954 error ("%qD must take either zero or one argument", decl);
8956 error ("%qD must take either one or two arguments", decl);
8959 /* More Effective C++ rule 6. */
8961 && (operator_code == POSTINCREMENT_EXPR
8962 || operator_code == POSTDECREMENT_EXPR
8963 || operator_code == PREINCREMENT_EXPR
8964 || operator_code == PREDECREMENT_EXPR))
8966 tree arg = TREE_VALUE (argtypes);
8967 tree ret = TREE_TYPE (TREE_TYPE (decl));
8968 if (methodp || TREE_CODE (arg) == REFERENCE_TYPE)
8969 arg = TREE_TYPE (arg);
8970 arg = TYPE_MAIN_VARIANT (arg);
8971 if (operator_code == PREINCREMENT_EXPR
8972 || operator_code == PREDECREMENT_EXPR)
8974 if (TREE_CODE (ret) != REFERENCE_TYPE
8975 || !same_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (ret)),
8977 warning ("prefix %qD should return %qT", decl,
8978 build_reference_type (arg));
8982 if (!same_type_p (TYPE_MAIN_VARIANT (ret), arg))
8983 warning ("postfix %qD should return %qT", decl, arg);
8987 else if (unary_op_p (operator_code))
8992 error ("%qD must take %<void%>", decl);
8994 error ("%qD must take exactly one argument", decl);
8997 else /* if (binary_op_p (operator_code)) */
9002 error ("%qD must take exactly one argument", decl);
9004 error ("%qD must take exactly two arguments", decl);
9007 /* More Effective C++ rule 7. */
9009 && (operator_code == TRUTH_ANDIF_EXPR
9010 || operator_code == TRUTH_ORIF_EXPR
9011 || operator_code == COMPOUND_EXPR))
9012 warning ("user-defined %qD always evaluates both arguments",
9016 /* Effective C++ rule 23. */
9019 && !DECL_ASSIGNMENT_OPERATOR_P (decl)
9020 && (operator_code == PLUS_EXPR
9021 || operator_code == MINUS_EXPR
9022 || operator_code == TRUNC_DIV_EXPR
9023 || operator_code == MULT_EXPR
9024 || operator_code == TRUNC_MOD_EXPR)
9025 && TREE_CODE (TREE_TYPE (TREE_TYPE (decl))) == REFERENCE_TYPE)
9026 warning ("%qD should return by value", decl);
9029 for (; argtypes && argtypes != void_list_node;
9030 argtypes = TREE_CHAIN (argtypes))
9031 if (TREE_PURPOSE (argtypes))
9033 TREE_PURPOSE (argtypes) = NULL_TREE;
9034 if (operator_code == POSTINCREMENT_EXPR
9035 || operator_code == POSTDECREMENT_EXPR)
9038 pedwarn ("%qD cannot have default arguments", decl);
9041 error ("%qD cannot have default arguments", decl);
9049 /* Return a string giving the keyword associate with CODE. */
9052 tag_name (enum tag_types code)
9071 /* Name lookup in an elaborated-type-specifier (after the keyword
9072 indicated by TAG_CODE) has found the TYPE_DECL DECL. If the
9073 elaborated-type-specifier is invalid, issue a diagnostic and return
9074 error_mark_node; otherwise, return the *_TYPE to which it referred.
9075 If ALLOW_TEMPLATE_P is true, TYPE may be a class template. */
9078 check_elaborated_type_specifier (enum tag_types tag_code,
9080 bool allow_template_p)
9086 struct S { struct S *p; };
9088 name lookup will find the TYPE_DECL for the implicit "S::S"
9089 typedef. Adjust for that here. */
9090 if (DECL_SELF_REFERENCE_P (decl))
9091 decl = TYPE_NAME (TREE_TYPE (decl));
9093 type = TREE_TYPE (decl);
9095 /* Check TEMPLATE_TYPE_PARM first because DECL_IMPLICIT_TYPEDEF_P
9096 is false for this case as well. */
9097 if (TREE_CODE (type) == TEMPLATE_TYPE_PARM)
9099 error ("using template type parameter %qT after %qs",
9100 type, tag_name (tag_code));
9101 return error_mark_node;
9105 If the identifier resolves to a typedef-name or a template
9106 type-parameter, the elaborated-type-specifier is ill-formed.
9108 In other words, the only legitimate declaration to use in the
9109 elaborated type specifier is the implicit typedef created when
9110 the type is declared. */
9111 else if (!DECL_IMPLICIT_TYPEDEF_P (decl)
9112 && tag_code != typename_type)
9114 error ("using typedef-name %qD after %qs", decl, tag_name (tag_code));
9115 cp_error_at ("%qD has a previous declaration here", decl);
9116 return error_mark_node;
9118 else if (TREE_CODE (type) != RECORD_TYPE
9119 && TREE_CODE (type) != UNION_TYPE
9120 && tag_code != enum_type
9121 && tag_code != typename_type)
9123 error ("%qT referred to as %qs", type, tag_name (tag_code));
9124 cp_error_at ("%qT has a previous declaration here", type);
9125 return error_mark_node;
9127 else if (TREE_CODE (type) != ENUMERAL_TYPE
9128 && tag_code == enum_type
9129 && tag_code != typename_type)
9131 error ("%qT referred to as enum", type);
9132 cp_error_at ("%qT has a previous declaration here", type);
9133 return error_mark_node;
9135 else if (!allow_template_p
9136 && TREE_CODE (type) == RECORD_TYPE
9137 && CLASSTYPE_IS_TEMPLATE (type))
9139 /* If a class template appears as elaborated type specifier
9140 without a template header such as:
9142 template <class T> class C {};
9143 void f(class C); // No template header here
9145 then the required template argument is missing. */
9147 error ("template argument required for %<%s %T%>",
9148 tag_name (tag_code),
9149 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type)));
9150 return error_mark_node;
9156 /* Lookup NAME in elaborate type specifier in scope according to
9157 SCOPE and issue diagnostics if necessary.
9158 Return *_TYPE node upon success, NULL_TREE when the NAME is not
9159 found, and ERROR_MARK_NODE for type error. */
9162 lookup_and_check_tag (enum tag_types tag_code, tree name,
9163 tag_scope scope, bool template_header_p)
9167 if (scope == ts_global)
9168 decl = lookup_name (name, 2);
9170 decl = lookup_type_scope (name, scope);
9172 if (decl && DECL_CLASS_TEMPLATE_P (decl))
9173 decl = DECL_TEMPLATE_RESULT (decl);
9175 if (decl && TREE_CODE (decl) == TYPE_DECL)
9177 /* Look for invalid nested type:
9181 if (scope == ts_current && DECL_SELF_REFERENCE_P (decl))
9183 error ("%qD has the same name as the class in which it is "
9186 return error_mark_node;
9189 /* Two cases we need to consider when deciding if a class
9190 template is allowed as an elaborated type specifier:
9191 1. It is a self reference to its own class.
9192 2. It comes with a template header.
9196 template <class T> class C {
9197 class C *c1; // DECL_SELF_REFERENCE_P is true
9200 template <class U> class C; // template_header_p is true
9201 template <class T> class C<T>::D {
9202 class C *c2; // DECL_SELF_REFERENCE_P is true
9205 t = check_elaborated_type_specifier (tag_code,
9208 | DECL_SELF_REFERENCE_P (decl));
9215 /* Get the struct, enum or union (TAG_CODE says which) with tag NAME.
9216 Define the tag as a forward-reference if it is not defined.
9218 If a declaration is given, process it here, and report an error if
9219 multiple declarations are not identical.
9221 SCOPE is TS_CURRENT when this is also a definition. Only look in
9222 the current frame for the name (since C++ allows new names in any
9223 scope.) It is TS_WITHIN_ENCLOSING_NON_CLASS if this is a friend
9224 declaration. Only look beginning from the current scope outward up
9225 till the nearest non-class scope. Otherwise it is TS_GLOBAL.
9227 TEMPLATE_HEADER_P is true when this declaration is preceded by
9228 a set of template parameters. */
9231 xref_tag (enum tag_types tag_code, tree name,
9232 tag_scope scope, bool template_header_p)
9234 enum tree_code code;
9236 tree context = NULL_TREE;
9238 timevar_push (TV_NAME_LOOKUP);
9240 gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE);
9252 code = ENUMERAL_TYPE;
9258 /* In case of anonymous name, xref_tag is only called to
9259 make type node and push name. Name lookup is not required. */
9260 if (ANON_AGGRNAME_P (name))
9263 t = lookup_and_check_tag (tag_code, name,
9264 scope, template_header_p);
9266 if (t == error_mark_node)
9267 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
9269 if (scope != ts_current && t && current_class_type
9270 && template_class_depth (current_class_type)
9271 && template_header_p)
9273 /* Since SCOPE is not TS_CURRENT, we are not looking at a
9274 definition of this tag. Since, in addition, we are currently
9275 processing a (member) template declaration of a template
9276 class, we must be very careful; consider:
9283 { template <class V>
9284 friend struct S1; };
9286 Here, the S2::S1 declaration should not be confused with the
9287 outer declaration. In particular, the inner version should
9288 have a template parameter of level 2, not level 1. This
9289 would be particularly important if the member declaration
9292 template <class V = U> friend struct S1;
9294 say, when we should tsubst into `U' when instantiating
9295 S2. On the other hand, when presented with:
9305 we must find the inner binding eventually. We
9306 accomplish this by making sure that the new type we
9307 create to represent this declaration has the right
9309 context = TYPE_CONTEXT (t);
9315 /* If no such tag is yet defined, create a forward-reference node
9316 and record it as the "definition".
9317 When a real declaration of this type is found,
9318 the forward-reference will be altered into a real type. */
9319 if (code == ENUMERAL_TYPE)
9321 error ("use of enum %q#D without previous declaration", name);
9322 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
9326 t = make_aggr_type (code);
9327 TYPE_CONTEXT (t) = context;
9328 /* pushtag only cares whether SCOPE is zero or not. */
9329 t = pushtag (name, t, scope != ts_current);
9334 if (template_header_p && IS_AGGR_TYPE (t))
9335 redeclare_class_template (t, current_template_parms);
9336 else if (!processing_template_decl
9338 && CLASSTYPE_IS_TEMPLATE (t))
9340 error ("redeclaration of %qT as a non-template", t);
9341 t = error_mark_node;
9345 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, t);
9349 xref_tag_from_type (tree old, tree id, tag_scope scope)
9351 enum tag_types tag_kind;
9353 if (TREE_CODE (old) == RECORD_TYPE)
9354 tag_kind = (CLASSTYPE_DECLARED_CLASS (old) ? class_type : record_type);
9356 tag_kind = union_type;
9358 if (id == NULL_TREE)
9359 id = TYPE_IDENTIFIER (old);
9361 return xref_tag (tag_kind, id, scope, false);
9364 /* Create the binfo hierarchy for REF with (possibly NULL) base list
9365 BASE_LIST. For each element on BASE_LIST the TREE_PURPOSE is an
9366 access_* node, and the TREE_VALUE is the type of the base-class.
9367 Non-NULL TREE_TYPE indicates virtual inheritance. */
9370 xref_basetypes (tree ref, tree base_list)
9373 tree binfo, base_binfo;
9374 unsigned max_vbases = 0; /* Maximum direct & indirect virtual bases. */
9375 unsigned max_bases = 0; /* Maximum direct bases. */
9377 tree default_access;
9378 tree igo_prev; /* Track Inheritance Graph Order. */
9380 if (ref == error_mark_node)
9383 /* The base of a derived class is private by default, all others are
9385 default_access = (TREE_CODE (ref) == RECORD_TYPE
9386 && CLASSTYPE_DECLARED_CLASS (ref)
9387 ? access_private_node : access_public_node);
9389 /* First, make sure that any templates in base-classes are
9390 instantiated. This ensures that if we call ourselves recursively
9391 we do not get confused about which classes are marked and which
9396 tree basetype = TREE_VALUE (*basep);
9398 if (!(processing_template_decl && uses_template_parms (basetype))
9399 && !complete_type_or_else (basetype, NULL))
9400 /* An incomplete type. Remove it from the list. */
9401 *basep = TREE_CHAIN (*basep);
9405 if (TREE_TYPE (*basep))
9407 if (CLASS_TYPE_P (basetype))
9408 max_vbases += VEC_length (tree, CLASSTYPE_VBASECLASSES (basetype));
9409 basep = &TREE_CHAIN (*basep);
9413 TYPE_MARKED_P (ref) = 1;
9415 /* The binfo slot should be empty, unless this is an (ill-formed)
9417 gcc_assert (!TYPE_BINFO (ref) || TYPE_SIZE (ref));
9418 gcc_assert (TYPE_MAIN_VARIANT (ref) == ref);
9420 binfo = make_tree_binfo (max_bases);
9422 TYPE_BINFO (ref) = binfo;
9423 BINFO_OFFSET (binfo) = size_zero_node;
9424 BINFO_TYPE (binfo) = ref;
9428 BINFO_BASE_ACCESSES (binfo) = VEC_alloc (tree, max_bases);
9429 /* An aggregate cannot have baseclasses. */
9430 CLASSTYPE_NON_AGGREGATE (ref) = 1;
9432 if (TREE_CODE (ref) == UNION_TYPE)
9433 error ("derived union %qT invalid", ref);
9438 if (TYPE_FOR_JAVA (ref))
9439 error ("Java class %qT cannot have multiple bases", ref);
9444 CLASSTYPE_VBASECLASSES (ref) = VEC_alloc (tree, max_vbases);
9446 if (TYPE_FOR_JAVA (ref))
9447 error ("Java class %qT cannot have virtual bases", ref);
9450 for (igo_prev = binfo; base_list; base_list = TREE_CHAIN (base_list))
9452 tree access = TREE_PURPOSE (base_list);
9453 int via_virtual = TREE_TYPE (base_list) != NULL_TREE;
9454 tree basetype = TREE_VALUE (base_list);
9456 if (access == access_default_node)
9457 access = default_access;
9459 if (TREE_CODE (basetype) == TYPE_DECL)
9460 basetype = TREE_TYPE (basetype);
9461 if (TREE_CODE (basetype) != RECORD_TYPE
9462 && TREE_CODE (basetype) != TYPENAME_TYPE
9463 && TREE_CODE (basetype) != TEMPLATE_TYPE_PARM
9464 && TREE_CODE (basetype) != BOUND_TEMPLATE_TEMPLATE_PARM)
9466 error ("base type %qT fails to be a struct or class type",
9471 if (TYPE_FOR_JAVA (basetype) && (current_lang_depth () == 0))
9472 TYPE_FOR_JAVA (ref) = 1;
9474 base_binfo = NULL_TREE;
9475 if (CLASS_TYPE_P (basetype) && !dependent_type_p (basetype))
9477 base_binfo = TYPE_BINFO (basetype);
9478 /* The original basetype could have been a typedef'd type. */
9479 basetype = BINFO_TYPE (base_binfo);
9481 /* Inherit flags from the base. */
9482 TYPE_HAS_NEW_OPERATOR (ref)
9483 |= TYPE_HAS_NEW_OPERATOR (basetype);
9484 TYPE_HAS_ARRAY_NEW_OPERATOR (ref)
9485 |= TYPE_HAS_ARRAY_NEW_OPERATOR (basetype);
9486 TYPE_GETS_DELETE (ref) |= TYPE_GETS_DELETE (basetype);
9487 TYPE_HAS_CONVERSION (ref) |= TYPE_HAS_CONVERSION (basetype);
9488 CLASSTYPE_DIAMOND_SHAPED_P (ref)
9489 |= CLASSTYPE_DIAMOND_SHAPED_P (basetype);
9490 CLASSTYPE_REPEATED_BASE_P (ref)
9491 |= CLASSTYPE_REPEATED_BASE_P (basetype);
9494 /* We must do this test after we've seen through a typedef
9496 if (TYPE_MARKED_P (basetype))
9498 if (basetype == ref)
9499 error ("recursive type %qT undefined", basetype);
9501 error ("duplicate base type %qT invalid", basetype);
9504 TYPE_MARKED_P (basetype) = 1;
9506 base_binfo = copy_binfo (base_binfo, basetype, ref,
9507 &igo_prev, via_virtual);
9508 if (!BINFO_INHERITANCE_CHAIN (base_binfo))
9509 BINFO_INHERITANCE_CHAIN (base_binfo) = binfo;
9511 BINFO_BASE_APPEND (binfo, base_binfo);
9512 BINFO_BASE_ACCESS_APPEND (binfo, access);
9515 if (VEC_space (tree, CLASSTYPE_VBASECLASSES (ref), 1))
9516 /* If we have space in the vbase vector, we must have shared at
9517 least one of them, and are therefore diamond shaped. */
9518 CLASSTYPE_DIAMOND_SHAPED_P (ref) = 1;
9520 /* Unmark all the types. */
9521 for (i = 0; BINFO_BASE_ITERATE (binfo, i, base_binfo); i++)
9522 TYPE_MARKED_P (BINFO_TYPE (base_binfo)) = 0;
9523 TYPE_MARKED_P (ref) = 0;
9525 /* Now see if we have a repeated base type. */
9526 if (!CLASSTYPE_REPEATED_BASE_P (ref))
9528 for (base_binfo = binfo; base_binfo;
9529 base_binfo = TREE_CHAIN (base_binfo))
9531 if (TYPE_MARKED_P (BINFO_TYPE (base_binfo)))
9533 CLASSTYPE_REPEATED_BASE_P (ref) = 1;
9536 TYPE_MARKED_P (BINFO_TYPE (base_binfo)) = 1;
9538 for (base_binfo = binfo; base_binfo;
9539 base_binfo = TREE_CHAIN (base_binfo))
9540 if (TYPE_MARKED_P (BINFO_TYPE (base_binfo)))
9541 TYPE_MARKED_P (BINFO_TYPE (base_binfo)) = 0;
9548 /* Begin compiling the definition of an enumeration type.
9550 Returns the type object, as yet incomplete.
9551 Also records info about it so that build_enumerator
9552 may be used to declare the individual values as they are read. */
9555 start_enum (tree name)
9559 gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE);
9561 /* If this is the real definition for a previous forward reference,
9562 fill in the contents in the same object that used to be the
9563 forward reference. */
9565 enumtype = lookup_and_check_tag (enum_type, name,
9566 /*tag_scope=*/ts_current,
9567 /*template_header_p=*/false);
9569 if (enumtype != NULL_TREE && TREE_CODE (enumtype) == ENUMERAL_TYPE)
9571 error ("multiple definition of %q#T", enumtype);
9572 error ("%Jprevious definition here", TYPE_MAIN_DECL (enumtype));
9573 /* Clear out TYPE_VALUES, and start again. */
9574 TYPE_VALUES (enumtype) = NULL_TREE;
9578 /* In case of error, make a dummy enum to allow parsing to
9580 if (enumtype == error_mark_node)
9581 name = make_anon_name ();
9583 enumtype = make_node (ENUMERAL_TYPE);
9584 enumtype = pushtag (name, enumtype, 0);
9590 /* After processing and defining all the values of an enumeration type,
9591 install their decls in the enumeration type and finish it off.
9592 ENUMTYPE is the type object and VALUES a list of name-value pairs. */
9595 finish_enum (tree enumtype)
9604 bool use_short_enum;
9608 integer_type_kind itk;
9609 tree underlying_type = NULL_TREE;
9611 /* We built up the VALUES in reverse order. */
9612 TYPE_VALUES (enumtype) = nreverse (TYPE_VALUES (enumtype));
9614 /* For an enum defined in a template, just set the type of the values;
9615 all further processing is postponed until the template is
9616 instantiated. We need to set the type so that tsubst of a CONST_DECL
9618 if (processing_template_decl)
9620 for (values = TYPE_VALUES (enumtype);
9622 values = TREE_CHAIN (values))
9623 TREE_TYPE (TREE_VALUE (values)) = enumtype;
9624 if (at_function_scope_p ())
9625 add_stmt (build_min (TAG_DEFN, enumtype));
9629 /* Determine the minimum and maximum values of the enumerators. */
9630 if (TYPE_VALUES (enumtype))
9632 minnode = maxnode = NULL_TREE;
9634 for (values = TYPE_VALUES (enumtype);
9636 values = TREE_CHAIN (values))
9638 decl = TREE_VALUE (values);
9640 /* [dcl.enum]: Following the closing brace of an enum-specifier,
9641 each enumerator has the type of its enumeration. Prior to the
9642 closing brace, the type of each enumerator is the type of its
9643 initializing value. */
9644 TREE_TYPE (decl) = enumtype;
9646 /* Update the minimum and maximum values, if appropriate. */
9647 value = DECL_INITIAL (decl);
9648 /* Figure out what the minimum and maximum values of the
9651 minnode = maxnode = value;
9652 else if (tree_int_cst_lt (maxnode, value))
9654 else if (tree_int_cst_lt (value, minnode))
9661 If the enumerator-list is empty, the underlying type is as if
9662 the enumeration had a single enumerator with value 0. */
9663 minnode = maxnode = integer_zero_node;
9665 /* Compute the number of bits require to represent all values of the
9666 enumeration. We must do this before the type of MINNODE and
9667 MAXNODE are transformed, since min_precision relies on the
9668 TREE_TYPE of the value it is passed. */
9669 unsignedp = tree_int_cst_sgn (minnode) >= 0;
9670 lowprec = min_precision (minnode, unsignedp);
9671 highprec = min_precision (maxnode, unsignedp);
9672 precision = MAX (lowprec, highprec);
9674 /* Determine the underlying type of the enumeration.
9678 The underlying type of an enumeration is an integral type that
9679 can represent all the enumerator values defined in the
9680 enumeration. It is implementation-defined which integral type is
9681 used as the underlying type for an enumeration except that the
9682 underlying type shall not be larger than int unless the value of
9683 an enumerator cannot fit in an int or unsigned int.
9685 We use "int" or an "unsigned int" as the underlying type, even if
9686 a smaller integral type would work, unless the user has
9687 explicitly requested that we use the smallest possible type. The
9688 user can request that for all enumerations with a command line
9689 flag, or for just one enumeration with an attribute. */
9691 use_short_enum = flag_short_enums
9692 || lookup_attribute ("packed", TYPE_ATTRIBUTES (enumtype));
9694 for (itk = (use_short_enum ? itk_char : itk_int);
9698 underlying_type = integer_types[itk];
9699 if (TYPE_PRECISION (underlying_type) >= precision
9700 && TYPE_UNSIGNED (underlying_type) == unsignedp)
9703 if (itk == itk_none)
9707 IF no integral type can represent all the enumerator values, the
9708 enumeration is ill-formed. */
9709 error ("no integral type can represent all of the enumerator values "
9710 "for %qT", enumtype);
9711 precision = TYPE_PRECISION (long_long_integer_type_node);
9712 underlying_type = integer_types[itk_unsigned_long_long];
9715 /* Compute the minium and maximum values for the type.
9719 For an enumeration where emin is the smallest enumerator and emax
9720 is the largest, the values of the enumeration are the values of the
9721 underlying type in the range bmin to bmax, where bmin and bmax are,
9722 respectively, the smallest and largest values of the smallest bit-
9723 field that can store emin and emax. */
9725 /* The middle-end currently assumes that types with TYPE_PRECISION
9726 narrower than their underlying type are suitably zero or sign
9727 extended to fill their mode. g++ doesn't make these guarantees.
9728 Until the middle-end can represent such paradoxical types, we
9729 set the TYPE_PRECISION to the width of the underlying type. */
9730 TYPE_PRECISION (enumtype) = TYPE_PRECISION (underlying_type);
9732 set_min_and_max_values_for_integral_type (enumtype, precision, unsignedp);
9736 The value of sizeof() applied to an enumeration type, an object
9737 of an enumeration type, or an enumerator, is the value of sizeof()
9738 applied to the underlying type. */
9739 TYPE_SIZE (enumtype) = TYPE_SIZE (underlying_type);
9740 TYPE_SIZE_UNIT (enumtype) = TYPE_SIZE_UNIT (underlying_type);
9741 TYPE_MODE (enumtype) = TYPE_MODE (underlying_type);
9742 TYPE_ALIGN (enumtype) = TYPE_ALIGN (underlying_type);
9743 TYPE_USER_ALIGN (enumtype) = TYPE_USER_ALIGN (underlying_type);
9744 TYPE_UNSIGNED (enumtype) = TYPE_UNSIGNED (underlying_type);
9746 /* Convert each of the enumerators to the type of the underlying
9747 type of the enumeration. */
9748 for (values = TYPE_VALUES (enumtype); values; values = TREE_CHAIN (values))
9750 decl = TREE_VALUE (values);
9751 value = perform_implicit_conversion (underlying_type,
9752 DECL_INITIAL (decl));
9754 /* Do not clobber shared ints. */
9755 value = copy_node (value);
9757 TREE_TYPE (value) = enumtype;
9758 DECL_INITIAL (decl) = value;
9759 TREE_VALUE (values) = value;
9762 /* Fix up all variant types of this enum type. */
9763 for (t = TYPE_MAIN_VARIANT (enumtype); t; t = TYPE_NEXT_VARIANT (t))
9765 TYPE_VALUES (t) = TYPE_VALUES (enumtype);
9766 TYPE_MIN_VALUE (t) = TYPE_MIN_VALUE (enumtype);
9767 TYPE_MAX_VALUE (t) = TYPE_MAX_VALUE (enumtype);
9768 TYPE_SIZE (t) = TYPE_SIZE (enumtype);
9769 TYPE_SIZE_UNIT (t) = TYPE_SIZE_UNIT (enumtype);
9770 TYPE_MODE (t) = TYPE_MODE (enumtype);
9771 TYPE_PRECISION (t) = TYPE_PRECISION (enumtype);
9772 TYPE_ALIGN (t) = TYPE_ALIGN (enumtype);
9773 TYPE_USER_ALIGN (t) = TYPE_USER_ALIGN (enumtype);
9774 TYPE_UNSIGNED (t) = TYPE_UNSIGNED (enumtype);
9777 /* Finish debugging output for this type. */
9778 rest_of_type_compilation (enumtype, namespace_bindings_p ());
9781 /* Build and install a CONST_DECL for an enumeration constant of the
9782 enumeration type ENUMTYPE whose NAME and VALUE (if any) are provided.
9783 Assignment of sequential values by default is handled here. */
9786 build_enumerator (tree name, tree value, tree enumtype)
9792 /* Remove no-op casts from the value. */
9794 STRIP_TYPE_NOPS (value);
9796 if (! processing_template_decl)
9798 /* Validate and default VALUE. */
9799 if (value != NULL_TREE)
9801 value = integral_constant_value (value);
9803 if (TREE_CODE (value) == INTEGER_CST)
9805 value = perform_integral_promotions (value);
9806 constant_expression_warning (value);
9810 error ("enumerator value for %qD not integer constant", name);
9815 /* Default based on previous value. */
9816 if (value == NULL_TREE)
9818 if (TYPE_VALUES (enumtype))
9821 unsigned HOST_WIDE_INT lo;
9825 /* The next value is the previous value plus one. We can
9826 safely assume that the previous value is an INTEGER_CST.
9827 add_double doesn't know the type of the target expression,
9828 so we must check with int_fits_type_p as well. */
9829 prev_value = DECL_INITIAL (TREE_VALUE (TYPE_VALUES (enumtype)));
9830 overflowed = add_double (TREE_INT_CST_LOW (prev_value),
9831 TREE_INT_CST_HIGH (prev_value),
9833 value = build_int_cst_wide (TREE_TYPE (prev_value), lo, hi);
9834 overflowed |= !int_fits_type_p (value, TREE_TYPE (prev_value));
9837 error ("overflow in enumeration values at %qD", name);
9840 value = integer_zero_node;
9843 /* Remove no-op casts from the value. */
9844 STRIP_TYPE_NOPS (value);
9847 /* C++ associates enums with global, function, or class declarations. */
9848 context = current_scope ();
9850 /* Build the actual enumeration constant. Note that the enumeration
9851 constants have the type of their initializers until the
9852 enumeration is complete:
9856 Following the closing brace of an enum-specifier, each enumer-
9857 ator has the type of its enumeration. Prior to the closing
9858 brace, the type of each enumerator is the type of its
9861 In finish_enum we will reset the type. Of course, if we're
9862 processing a template, there may be no value. */
9863 type = value ? TREE_TYPE (value) : NULL_TREE;
9865 if (context && context == current_class_type)
9866 /* This enum declaration is local to the class. We need the full
9867 lang_decl so that we can record DECL_CLASS_CONTEXT, for example. */
9868 decl = build_lang_decl (CONST_DECL, name, type);
9870 /* It's a global enum, or it's local to a function. (Note local to
9871 a function could mean local to a class method. */
9872 decl = build_decl (CONST_DECL, name, type);
9874 DECL_CONTEXT (decl) = FROB_CONTEXT (context);
9875 TREE_CONSTANT (decl) = 1;
9876 TREE_INVARIANT (decl) = 1;
9877 TREE_READONLY (decl) = 1;
9878 DECL_INITIAL (decl) = value;
9880 if (context && context == current_class_type)
9881 /* In something like `struct S { enum E { i = 7 }; };' we put `i'
9882 on the TYPE_FIELDS list for `S'. (That's so that you can say
9883 things like `S::i' later.) */
9884 finish_member_declaration (decl);
9888 /* Add this enumeration constant to the list for this type. */
9889 TYPE_VALUES (enumtype) = tree_cons (name, decl, TYPE_VALUES (enumtype));
9893 /* We're defining DECL. Make sure that it's type is OK. */
9896 check_function_type (tree decl, tree current_function_parms)
9898 tree fntype = TREE_TYPE (decl);
9899 tree return_type = complete_type (TREE_TYPE (fntype));
9901 /* In a function definition, arg types must be complete. */
9902 require_complete_types_for_parms (current_function_parms);
9904 if (dependent_type_p (return_type))
9906 if (!COMPLETE_OR_VOID_TYPE_P (return_type))
9908 error ("return type %q#T is incomplete", TREE_TYPE (fntype));
9910 /* Make it return void instead, but don't change the
9911 type of the DECL_RESULT, in case we have a named return value. */
9912 if (TREE_CODE (fntype) == METHOD_TYPE)
9914 tree ctype = TREE_TYPE (TREE_VALUE (TYPE_ARG_TYPES (fntype)));
9916 = build_method_type_directly (ctype,
9918 FUNCTION_ARG_CHAIN (decl));
9922 = build_function_type (void_type_node,
9923 TYPE_ARG_TYPES (TREE_TYPE (decl)));
9925 = build_exception_variant (fntype,
9926 TYPE_RAISES_EXCEPTIONS (fntype));
9929 abstract_virtuals_error (decl, TREE_TYPE (fntype));
9932 /* Create the FUNCTION_DECL for a function definition.
9933 DECLSPECS and DECLARATOR are the parts of the declaration;
9934 they describe the function's name and the type it returns,
9935 but twisted together in a fashion that parallels the syntax of C.
9937 FLAGS is a bitwise or of SF_PRE_PARSED (indicating that the
9938 DECLARATOR is really the DECL for the function we are about to
9939 process and that DECLSPECS should be ignored), SF_INCLASS_INLINE
9940 indicating that the function is an inline defined in-class.
9942 This function creates a binding context for the function body
9943 as well as setting up the FUNCTION_DECL in current_function_decl.
9945 For C++, we must first check whether that datum makes any sense.
9946 For example, "class A local_a(1,2);" means that variable local_a
9947 is an aggregate of type A, which should have a constructor
9948 applied to it with the argument list [1, 2]. */
9951 start_preparsed_function (tree decl1, tree attrs, int flags)
9953 tree ctype = NULL_TREE;
9956 int doing_friend = 0;
9957 struct cp_binding_level *bl;
9958 tree current_function_parms;
9959 struct c_fileinfo *finfo = get_fileinfo (lbasename (input_filename));
9962 gcc_assert (TREE_CODE (TREE_VALUE (void_list_node)) == VOID_TYPE);
9963 gcc_assert (TREE_CHAIN (void_list_node) == NULL_TREE);
9965 fntype = TREE_TYPE (decl1);
9966 if (TREE_CODE (fntype) == METHOD_TYPE)
9967 ctype = TYPE_METHOD_BASETYPE (fntype);
9969 /* ISO C++ 11.4/5. A friend function defined in a class is in
9970 the (lexical) scope of the class in which it is defined. */
9971 if (!ctype && DECL_FRIEND_P (decl1))
9973 ctype = DECL_FRIEND_CONTEXT (decl1);
9975 /* CTYPE could be null here if we're dealing with a template;
9976 for example, `inline friend float foo()' inside a template
9977 will have no CTYPE set. */
9978 if (ctype && TREE_CODE (ctype) != RECORD_TYPE)
9984 if (DECL_DECLARED_INLINE_P (decl1)
9985 && lookup_attribute ("noinline", attrs))
9986 warning ("%Jinline function %qD given attribute noinline", decl1, decl1);
9988 if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (decl1))
9989 /* This is a constructor, we must ensure that any default args
9990 introduced by this definition are propagated to the clones
9991 now. The clones are used directly in overload resolution. */
9992 adjust_clone_args (decl1);
9994 /* Sometimes we don't notice that a function is a static member, and
9995 build a METHOD_TYPE for it. Fix that up now. */
9996 if (ctype != NULL_TREE && DECL_STATIC_FUNCTION_P (decl1)
9997 && TREE_CODE (TREE_TYPE (decl1)) == METHOD_TYPE)
9999 revert_static_member_fn (decl1);
10003 /* Set up current_class_type, and enter the scope of the class, if
10006 push_nested_class (ctype);
10007 else if (DECL_STATIC_FUNCTION_P (decl1))
10008 push_nested_class (DECL_CONTEXT (decl1));
10010 /* Now that we have entered the scope of the class, we must restore
10011 the bindings for any template parameters surrounding DECL1, if it
10012 is an inline member template. (Order is important; consider the
10013 case where a template parameter has the same name as a field of
10014 the class.) It is not until after this point that
10015 PROCESSING_TEMPLATE_DECL is guaranteed to be set up correctly. */
10016 if (flags & SF_INCLASS_INLINE)
10017 maybe_begin_member_template_processing (decl1);
10019 /* Effective C++ rule 15. */
10021 && DECL_OVERLOADED_OPERATOR_P (decl1) == NOP_EXPR
10022 && TREE_CODE (TREE_TYPE (fntype)) == VOID_TYPE)
10023 warning ("%<operator=%> should return a reference to %<*this%>");
10025 /* Make the init_value nonzero so pushdecl knows this is not tentative.
10026 error_mark_node is replaced below (in poplevel) with the BLOCK. */
10027 if (!DECL_INITIAL (decl1))
10028 DECL_INITIAL (decl1) = error_mark_node;
10030 /* This function exists in static storage.
10031 (This does not mean `static' in the C sense!) */
10032 TREE_STATIC (decl1) = 1;
10034 /* We must call push_template_decl after current_class_type is set
10035 up. (If we are processing inline definitions after exiting a
10036 class scope, current_class_type will be NULL_TREE until set above
10037 by push_nested_class.) */
10038 if (processing_template_decl)
10039 decl1 = push_template_decl (decl1);
10041 /* We are now in the scope of the function being defined. */
10042 current_function_decl = decl1;
10044 /* Save the parm names or decls from this function's declarator
10045 where store_parm_decls will find them. */
10046 current_function_parms = DECL_ARGUMENTS (decl1);
10048 /* Make sure the parameter and return types are reasonable. When
10049 you declare a function, these types can be incomplete, but they
10050 must be complete when you define the function. */
10051 check_function_type (decl1, current_function_parms);
10053 /* Build the return declaration for the function. */
10054 restype = TREE_TYPE (fntype);
10055 /* Promote the value to int before returning it. */
10056 if (c_promoting_integer_type_p (restype))
10057 restype = type_promotes_to (restype);
10058 if (DECL_RESULT (decl1) == NULL_TREE)
10062 resdecl = build_decl (RESULT_DECL, 0, TYPE_MAIN_VARIANT (restype));
10063 DECL_ARTIFICIAL (resdecl) = 1;
10064 DECL_IGNORED_P (resdecl) = 1;
10065 DECL_RESULT (decl1) = resdecl;
10067 c_apply_type_quals_to_decl (cp_type_quals (restype), resdecl);
10070 /* Initialize RTL machinery. We cannot do this until
10071 CURRENT_FUNCTION_DECL and DECL_RESULT are set up. We do this
10072 even when processing a template; this is how we get
10073 CFUN set up, and our per-function variables initialized.
10074 FIXME factor out the non-RTL stuff. */
10075 bl = current_binding_level;
10076 allocate_struct_function (decl1);
10077 current_binding_level = bl;
10079 /* Even though we're inside a function body, we still don't want to
10080 call expand_expr to calculate the size of a variable-sized array.
10081 We haven't necessarily assigned RTL to all variables yet, so it's
10082 not safe to try to expand expressions involving them. */
10083 cfun->x_dont_save_pending_sizes_p = 1;
10085 /* Start the statement-tree, start the tree now. */
10086 DECL_SAVED_TREE (decl1) = push_stmt_list ();
10088 /* Let the user know we're compiling this function. */
10089 announce_function (decl1);
10091 /* Record the decl so that the function name is defined.
10092 If we already have a decl for this name, and it is a FUNCTION_DECL,
10093 use the old decl. */
10094 if (!processing_template_decl && !(flags & SF_PRE_PARSED))
10096 /* A specialization is not used to guide overload resolution. */
10097 if (!DECL_FUNCTION_MEMBER_P (decl1)
10098 && !(DECL_USE_TEMPLATE (decl1) &&
10099 PRIMARY_TEMPLATE_P (DECL_TI_TEMPLATE (decl1))))
10101 tree olddecl = pushdecl (decl1);
10103 if (olddecl == error_mark_node)
10104 /* If something went wrong when registering the declaration,
10105 use DECL1; we have to have a FUNCTION_DECL to use when
10106 parsing the body of the function. */
10109 /* Otherwise, OLDDECL is either a previous declaration of
10110 the same function or DECL1 itself. */
10115 /* We need to set the DECL_CONTEXT. */
10116 if (!DECL_CONTEXT (decl1) && DECL_TEMPLATE_INFO (decl1))
10117 DECL_CONTEXT (decl1) = DECL_CONTEXT (DECL_TI_TEMPLATE (decl1));
10118 /* And make sure we have enough default args. */
10119 check_default_args (decl1);
10121 fntype = TREE_TYPE (decl1);
10124 /* Determine the ELF visibility attribute for the function. We must
10125 not do this before calling "pushdecl", as we must allow
10126 "duplicate_decls" to merge any attributes appropriately. */
10127 if (!DECL_CLONED_FUNCTION_P (decl1))
10128 determine_visibility (decl1);
10130 /* Reset these in case the call to pushdecl changed them. */
10131 current_function_decl = decl1;
10132 cfun->decl = decl1;
10134 /* If we are (erroneously) defining a function that we have already
10135 defined before, wipe out what we knew before. */
10136 if (!DECL_PENDING_INLINE_P (decl1))
10137 DECL_SAVED_FUNCTION_DATA (decl1) = NULL;
10139 if (ctype && !doing_friend && !DECL_STATIC_FUNCTION_P (decl1))
10141 /* We know that this was set up by `grokclassfn'. We do not
10142 wait until `store_parm_decls', since evil parse errors may
10143 never get us to that point. Here we keep the consistency
10144 between `current_class_type' and `current_class_ptr'. */
10145 tree t = DECL_ARGUMENTS (decl1);
10147 gcc_assert (t != NULL_TREE && TREE_CODE (t) == PARM_DECL);
10148 gcc_assert (TREE_CODE (TREE_TYPE (t)) == POINTER_TYPE);
10150 cp_function_chain->x_current_class_ref
10151 = build_indirect_ref (t, NULL);
10152 cp_function_chain->x_current_class_ptr = t;
10154 /* Constructors and destructors need to know whether they're "in
10155 charge" of initializing virtual base classes. */
10156 t = TREE_CHAIN (t);
10157 if (DECL_HAS_IN_CHARGE_PARM_P (decl1))
10159 current_in_charge_parm = t;
10160 t = TREE_CHAIN (t);
10162 if (DECL_HAS_VTT_PARM_P (decl1))
10164 gcc_assert (DECL_NAME (t) == vtt_parm_identifier);
10165 current_vtt_parm = t;
10169 if (DECL_INTERFACE_KNOWN (decl1))
10171 tree ctx = decl_function_context (decl1);
10173 if (DECL_NOT_REALLY_EXTERN (decl1))
10174 DECL_EXTERNAL (decl1) = 0;
10176 if (ctx != NULL_TREE && DECL_DECLARED_INLINE_P (ctx)
10177 && TREE_PUBLIC (ctx))
10178 /* This is a function in a local class in an extern inline
10180 comdat_linkage (decl1);
10182 /* If this function belongs to an interface, it is public.
10183 If it belongs to someone else's interface, it is also external.
10184 This only affects inlines and template instantiations. */
10185 else if (finfo->interface_unknown == 0
10186 && ! DECL_TEMPLATE_INSTANTIATION (decl1))
10188 if (DECL_DECLARED_INLINE_P (decl1)
10189 || DECL_TEMPLATE_INSTANTIATION (decl1)
10190 || processing_template_decl)
10192 DECL_EXTERNAL (decl1)
10193 = (finfo->interface_only
10194 || (DECL_DECLARED_INLINE_P (decl1)
10195 && ! flag_implement_inlines
10196 && !DECL_VINDEX (decl1)));
10198 /* For WIN32 we also want to put these in linkonce sections. */
10199 maybe_make_one_only (decl1);
10202 DECL_EXTERNAL (decl1) = 0;
10203 DECL_NOT_REALLY_EXTERN (decl1) = 0;
10204 DECL_INTERFACE_KNOWN (decl1) = 1;
10205 /* If this function is in an interface implemented in this file,
10206 make sure that the backend knows to emit this function
10208 if (!DECL_EXTERNAL (decl1))
10209 mark_needed (decl1);
10211 else if (finfo->interface_unknown && finfo->interface_only
10212 && ! DECL_TEMPLATE_INSTANTIATION (decl1))
10214 /* If MULTIPLE_SYMBOL_SPACES is defined and we saw a #pragma
10215 interface, we will have both finfo->interface_unknown and
10216 finfo->interface_only set. In that case, we don't want to
10217 use the normal heuristics because someone will supply a
10218 #pragma implementation elsewhere, and deducing it here would
10219 produce a conflict. */
10220 comdat_linkage (decl1);
10221 DECL_EXTERNAL (decl1) = 0;
10222 DECL_INTERFACE_KNOWN (decl1) = 1;
10223 DECL_DEFER_OUTPUT (decl1) = 1;
10227 /* This is a definition, not a reference.
10228 So clear DECL_EXTERNAL. */
10229 DECL_EXTERNAL (decl1) = 0;
10231 if ((DECL_DECLARED_INLINE_P (decl1)
10232 || DECL_TEMPLATE_INSTANTIATION (decl1))
10233 && ! DECL_INTERFACE_KNOWN (decl1)
10234 /* Don't try to defer nested functions for now. */
10235 && ! decl_function_context (decl1))
10236 DECL_DEFER_OUTPUT (decl1) = 1;
10238 DECL_INTERFACE_KNOWN (decl1) = 1;
10241 begin_scope (sk_function_parms, decl1);
10245 if (DECL_DESTRUCTOR_P (decl1)
10246 || (DECL_CONSTRUCTOR_P (decl1)
10247 && targetm.cxx.cdtor_returns_this ()))
10249 cdtor_label = build_decl (LABEL_DECL, NULL_TREE, NULL_TREE);
10250 DECL_CONTEXT (cdtor_label) = current_function_decl;
10253 start_fname_decls ();
10255 store_parm_decls (current_function_parms);
10259 /* Like start_preparsed_function, except that instead of a
10260 FUNCTION_DECL, this function takes DECLSPECS and DECLARATOR.
10262 Returns 1 on success. If the DECLARATOR is not suitable for a function
10263 (it defines a datum instead), we return 0, which tells
10264 yyparse to report a parse error. */
10267 start_function (cp_decl_specifier_seq *declspecs,
10268 const cp_declarator *declarator,
10273 if (have_extern_spec)
10275 declspecs->storage_class = sc_extern;
10276 /* This should only be done once on the outermost decl. */
10277 have_extern_spec = false;
10280 decl1 = grokdeclarator (declarator, declspecs, FUNCDEF, 1, &attrs);
10281 /* If the declarator is not suitable for a function definition,
10282 cause a syntax error. */
10283 if (decl1 == NULL_TREE || TREE_CODE (decl1) != FUNCTION_DECL)
10286 /* If #pragma weak was used, mark the decl weak now. */
10287 if (global_scope_p (current_binding_level))
10288 maybe_apply_pragma_weak (decl1);
10290 if (DECL_MAIN_P (decl1))
10291 /* main must return int. grokfndecl should have corrected it
10292 (and issued a diagnostic) if the user got it wrong. */
10293 gcc_assert (same_type_p (TREE_TYPE (TREE_TYPE (decl1)),
10294 integer_type_node));
10296 start_preparsed_function (decl1, attrs, /*flags=*/SF_DEFAULT);
10301 /* Store the parameter declarations into the current function declaration.
10302 This is called after parsing the parameter declarations, before
10303 digesting the body of the function.
10305 Also install to binding contour return value identifier, if any. */
10308 store_parm_decls (tree current_function_parms)
10310 tree fndecl = current_function_decl;
10313 /* This is a chain of any other decls that came in among the parm
10314 declarations. If a parm is declared with enum {foo, bar} x;
10315 then CONST_DECLs for foo and bar are put here. */
10316 tree nonparms = NULL_TREE;
10318 if (current_function_parms)
10320 /* This case is when the function was defined with an ANSI prototype.
10321 The parms already have decls, so we need not do anything here
10322 except record them as in effect
10323 and complain if any redundant old-style parm decls were written. */
10325 tree specparms = current_function_parms;
10328 /* Must clear this because it might contain TYPE_DECLs declared
10330 current_binding_level->names = NULL;
10332 /* If we're doing semantic analysis, then we'll call pushdecl
10333 for each of these. We must do them in reverse order so that
10334 they end in the correct forward order. */
10335 specparms = nreverse (specparms);
10337 for (parm = specparms; parm; parm = next)
10339 next = TREE_CHAIN (parm);
10340 if (TREE_CODE (parm) == PARM_DECL)
10342 if (DECL_NAME (parm) == NULL_TREE
10343 || TREE_CODE (parm) != VOID_TYPE)
10346 error ("parameter %qD declared void", parm);
10350 /* If we find an enum constant or a type tag,
10351 put it aside for the moment. */
10352 TREE_CHAIN (parm) = NULL_TREE;
10353 nonparms = chainon (nonparms, parm);
10357 /* Get the decls in their original chain order and record in the
10358 function. This is all and only the PARM_DECLs that were
10359 pushed into scope by the loop above. */
10360 DECL_ARGUMENTS (fndecl) = getdecls ();
10363 DECL_ARGUMENTS (fndecl) = NULL_TREE;
10365 /* Now store the final chain of decls for the arguments
10366 as the decl-chain of the current lexical scope.
10367 Put the enumerators in as well, at the front so that
10368 DECL_ARGUMENTS is not modified. */
10369 current_binding_level->names = chainon (nonparms, DECL_ARGUMENTS (fndecl));
10371 /* For a cloned function, we've already got all the code we need;
10372 there's no need to add any extra bits. */
10373 if (!DECL_CLONED_FUNCTION_P (fndecl))
10375 /* Do the starting of the exception specifications, if we have any. */
10376 if (flag_exceptions && !processing_template_decl
10377 && flag_enforce_eh_specs
10378 && TYPE_RAISES_EXCEPTIONS (TREE_TYPE (current_function_decl)))
10379 current_eh_spec_block = begin_eh_spec_block ();
10384 /* We have finished doing semantic analysis on DECL, but have not yet
10385 generated RTL for its body. Save away our current state, so that
10386 when we want to generate RTL later we know what to do. */
10389 save_function_data (tree decl)
10391 struct language_function *f;
10393 /* Save the language-specific per-function data so that we can
10394 get it back when we really expand this function. */
10395 gcc_assert (!DECL_PENDING_INLINE_P (decl));
10398 f = GGC_NEW (struct language_function);
10399 memcpy (f, cp_function_chain, sizeof (struct language_function));
10400 DECL_SAVED_FUNCTION_DATA (decl) = f;
10402 /* Clear out the bits we don't need. */
10403 f->base.x_stmt_tree.x_cur_stmt_list = NULL_TREE;
10404 f->x_named_label_uses = NULL;
10405 f->bindings = NULL;
10406 f->x_local_names = NULL;
10410 /* Set the return value of the constructor (if present). */
10413 finish_constructor_body (void)
10418 if (targetm.cxx.cdtor_returns_this ())
10420 /* Any return from a constructor will end up here. */
10421 add_stmt (build_stmt (LABEL_EXPR, cdtor_label));
10423 val = DECL_ARGUMENTS (current_function_decl);
10424 val = build2 (MODIFY_EXPR, TREE_TYPE (val),
10425 DECL_RESULT (current_function_decl), val);
10426 /* Return the address of the object. */
10427 exprstmt = build_stmt (RETURN_EXPR, val);
10428 add_stmt (exprstmt);
10432 /* Do all the processing for the beginning of a destructor; set up the
10433 vtable pointers and cleanups for bases and members. */
10436 begin_destructor_body (void)
10439 tree compound_stmt;
10441 /* If the dtor is empty, and we know there is not any possible
10442 way we could use any vtable entries, before they are possibly
10443 set by a base class dtor, we don't have to setup the vtables,
10444 as we know that any base class dtor will set up any vtables
10445 it needs. We avoid MI, because one base class dtor can do a
10446 virtual dispatch to an overridden function that would need to
10447 have a non-related vtable set up, we cannot avoid setting up
10448 vtables in that case. We could change this to see if there
10449 is just one vtable.
10451 ??? In the destructor for a class, the vtables are set
10452 appropriately for that class. There will be no non-related
10453 vtables. jason 2001-12-11. */
10454 if_stmt = begin_if_stmt ();
10456 /* If it is not safe to avoid setting up the vtables, then
10457 someone will change the condition to be boolean_true_node.
10458 (Actually, for now, we do not have code to set the condition
10459 appropriately, so we just assume that we always need to
10460 initialize the vtables.) */
10461 finish_if_stmt_cond (boolean_true_node, if_stmt);
10463 compound_stmt = begin_compound_stmt (0);
10465 /* Make all virtual function table pointers in non-virtual base
10466 classes point to CURRENT_CLASS_TYPE's virtual function
10468 initialize_vtbl_ptrs (current_class_ptr);
10470 finish_compound_stmt (compound_stmt);
10471 finish_then_clause (if_stmt);
10472 finish_if_stmt (if_stmt);
10474 /* And insert cleanups for our bases and members so that they
10475 will be properly destroyed if we throw. */
10476 push_base_cleanups ();
10479 /* At the end of every destructor we generate code to delete the object if
10480 necessary. Do that now. */
10483 finish_destructor_body (void)
10487 /* Any return from a destructor will end up here; that way all base
10488 and member cleanups will be run when the function returns. */
10489 add_stmt (build_stmt (LABEL_EXPR, cdtor_label));
10491 /* In a virtual destructor, we must call delete. */
10492 if (DECL_VIRTUAL_P (current_function_decl))
10495 tree virtual_size = cxx_sizeof (current_class_type);
10499 At the point of definition of a virtual destructor (including
10500 an implicit definition), non-placement operator delete shall
10501 be looked up in the scope of the destructor's class and if
10502 found shall be accessible and unambiguous. */
10503 exprstmt = build_op_delete_call
10504 (DELETE_EXPR, current_class_ptr, virtual_size,
10505 /*global_p=*/false, NULL_TREE);
10507 if_stmt = begin_if_stmt ();
10508 finish_if_stmt_cond (build2 (BIT_AND_EXPR, integer_type_node,
10509 current_in_charge_parm,
10512 finish_expr_stmt (exprstmt);
10513 finish_then_clause (if_stmt);
10514 finish_if_stmt (if_stmt);
10517 if (targetm.cxx.cdtor_returns_this ())
10521 val = DECL_ARGUMENTS (current_function_decl);
10522 val = build2 (MODIFY_EXPR, TREE_TYPE (val),
10523 DECL_RESULT (current_function_decl), val);
10524 /* Return the address of the object. */
10525 exprstmt = build_stmt (RETURN_EXPR, val);
10526 add_stmt (exprstmt);
10530 /* Do the necessary processing for the beginning of a function body, which
10531 in this case includes member-initializers, but not the catch clauses of
10532 a function-try-block. Currently, this means opening a binding level
10533 for the member-initializers (in a ctor) and member cleanups (in a dtor).
10534 In other functions, this isn't necessary, but it doesn't hurt. */
10537 begin_function_body (void)
10541 if (processing_template_decl)
10542 /* Do nothing now. */;
10544 /* Always keep the BLOCK node associated with the outermost pair of
10545 curly braces of a function. These are needed for correct
10546 operation of dwarfout.c. */
10547 keep_next_level (true);
10549 stmt = begin_compound_stmt (BCS_FN_BODY);
10551 if (processing_template_decl)
10552 /* Do nothing now. */;
10553 else if (DECL_DESTRUCTOR_P (current_function_decl))
10554 begin_destructor_body ();
10559 /* Do the processing for the end of a function body. Currently, this means
10560 closing out the cleanups for fully-constructed bases and members, and in
10561 the case of the destructor, deleting the object if desired. Again, this
10562 is only meaningful for [cd]tors, since they are the only functions where
10563 there is a significant distinction between the main body and any
10564 function catch clauses. Handling, say, main() return semantics here
10565 would be wrong, as flowing off the end of a function catch clause for
10566 main() would also need to return 0. */
10569 finish_function_body (tree compstmt)
10571 /* Close the block. */
10572 finish_compound_stmt (compstmt);
10574 if (processing_template_decl)
10575 /* Do nothing now. */;
10576 else if (DECL_CONSTRUCTOR_P (current_function_decl))
10577 finish_constructor_body ();
10578 else if (DECL_DESTRUCTOR_P (current_function_decl))
10579 finish_destructor_body ();
10582 /* Finish up a function declaration and compile that function
10583 all the way to assembler language output. The free the storage
10584 for the function definition.
10586 FLAGS is a bitwise or of the following values:
10588 We just finished processing the body of an in-class inline
10589 function definition. (This processing will have taken place
10590 after the class definition is complete.) */
10593 finish_function (int flags)
10595 tree fndecl = current_function_decl;
10596 tree fntype, ctype = NULL_TREE;
10597 int inclass_inline = (flags & 2) != 0;
10600 /* When we get some parse errors, we can end up without a
10601 current_function_decl, so cope. */
10602 if (fndecl == NULL_TREE)
10603 return error_mark_node;
10605 if (DECL_NONSTATIC_MEMBER_FUNCTION_P (fndecl)
10606 && DECL_VIRTUAL_P (fndecl)
10607 && !processing_template_decl)
10609 tree fnclass = DECL_CONTEXT (fndecl);
10610 if (fndecl == CLASSTYPE_KEY_METHOD (fnclass))
10611 keyed_classes = tree_cons (NULL_TREE, fnclass, keyed_classes);
10614 nested = function_depth > 1;
10615 fntype = TREE_TYPE (fndecl);
10617 /* TREE_READONLY (fndecl) = 1;
10618 This caused &foo to be of type ptr-to-const-function
10619 which then got a warning when stored in a ptr-to-function variable. */
10621 gcc_assert (building_stmt_tree ());
10623 /* For a cloned function, we've already got all the code we need;
10624 there's no need to add any extra bits. */
10625 if (!DECL_CLONED_FUNCTION_P (fndecl))
10627 if (DECL_MAIN_P (current_function_decl))
10629 /* Make it so that `main' always returns 0 by default. */
10631 finish_return_stmt (integer_one_node);
10633 finish_return_stmt (integer_zero_node);
10637 /* Finish dealing with exception specifiers. */
10638 if (flag_exceptions && !processing_template_decl
10639 && flag_enforce_eh_specs
10640 && TYPE_RAISES_EXCEPTIONS (TREE_TYPE (current_function_decl)))
10641 finish_eh_spec_block (TYPE_RAISES_EXCEPTIONS
10642 (TREE_TYPE (current_function_decl)),
10643 current_eh_spec_block);
10646 /* If we're saving up tree structure, tie off the function now. */
10647 DECL_SAVED_TREE (fndecl) = pop_stmt_list (DECL_SAVED_TREE (fndecl));
10649 finish_fname_decls ();
10651 /* If this function can't throw any exceptions, remember that. */
10652 if (!processing_template_decl
10653 && !cp_function_chain->can_throw
10654 && !flag_non_call_exceptions)
10655 TREE_NOTHROW (fndecl) = 1;
10657 /* This must come after expand_function_end because cleanups might
10658 have declarations (from inline functions) that need to go into
10659 this function's blocks. */
10661 /* If the current binding level isn't the outermost binding level
10662 for this function, either there is a bug, or we have experienced
10663 syntax errors and the statement tree is malformed. */
10664 if (current_binding_level->kind != sk_function_parms)
10666 /* Make sure we have already experienced errors. */
10667 gcc_assert (errorcount);
10669 /* Throw away the broken statement tree and extra binding
10671 DECL_SAVED_TREE (fndecl) = alloc_stmt_list ();
10673 while (current_binding_level->kind != sk_function_parms)
10675 if (current_binding_level->kind == sk_class)
10676 pop_nested_class ();
10678 poplevel (0, 0, 0);
10681 poplevel (1, 0, 1);
10683 /* Statements should always be full-expressions at the outermost set
10684 of curly braces for a function. */
10685 gcc_assert (stmts_are_full_exprs_p ());
10687 /* Set up the named return value optimization, if we can. Candidate
10688 variables are selected in check_return_value. */
10689 if (current_function_return_value)
10691 tree r = current_function_return_value;
10694 if (r != error_mark_node
10695 /* This is only worth doing for fns that return in memory--and
10696 simpler, since we don't have to worry about promoted modes. */
10697 && aggregate_value_p (TREE_TYPE (TREE_TYPE (fndecl)), fndecl)
10698 /* Only allow this for variables declared in the outer scope of
10699 the function so we know that their lifetime always ends with a
10700 return; see g++.dg/opt/nrv6.C. We could be more flexible if
10701 we were to do this optimization in tree-ssa. */
10702 && (outer = BLOCK_SUBBLOCKS (DECL_INITIAL (fndecl)))
10703 /* Skip the artificial function body block. */
10704 && (outer = BLOCK_SUBBLOCKS (outer))
10705 && chain_member (r, BLOCK_VARS (outer)))
10706 finalize_nrv (&DECL_SAVED_TREE (fndecl), r, DECL_RESULT (fndecl));
10708 current_function_return_value = NULL_TREE;
10711 /* Remember that we were in class scope. */
10712 if (current_class_name)
10713 ctype = current_class_type;
10715 /* Must mark the RESULT_DECL as being in this function. */
10716 DECL_CONTEXT (DECL_RESULT (fndecl)) = fndecl;
10718 /* Set the BLOCK_SUPERCONTEXT of the outermost function scope to point
10719 to the FUNCTION_DECL node itself. */
10720 BLOCK_SUPERCONTEXT (DECL_INITIAL (fndecl)) = fndecl;
10722 /* Save away current state, if appropriate. */
10723 if (!processing_template_decl)
10724 save_function_data (fndecl);
10726 /* Complain if there's just no return statement. */
10727 if (warn_return_type
10728 && TREE_CODE (TREE_TYPE (fntype)) != VOID_TYPE
10729 && !dependent_type_p (TREE_TYPE (fntype))
10730 && !current_function_returns_value && !current_function_returns_null
10731 /* Don't complain if we abort or throw. */
10732 && !current_function_returns_abnormally
10733 && !DECL_NAME (DECL_RESULT (fndecl))
10734 /* Normally, with -Wreturn-type, flow will complain. Unless we're an
10735 inline function, as we might never be compiled separately. */
10736 && (DECL_INLINE (fndecl) || processing_template_decl)
10737 /* Structor return values (if any) are set by the compiler. */
10738 && !DECL_CONSTRUCTOR_P (fndecl)
10739 && !DECL_DESTRUCTOR_P (fndecl))
10740 warning ("no return statement in function returning non-void");
10742 /* Store the end of the function, so that we get good line number
10743 info for the epilogue. */
10744 cfun->function_end_locus = input_location;
10746 /* Genericize before inlining. */
10747 if (!processing_template_decl)
10749 struct language_function *f = DECL_SAVED_FUNCTION_DATA (fndecl);
10750 cp_genericize (fndecl);
10751 /* Clear out the bits we don't need. */
10752 f->x_current_class_ptr = NULL;
10753 f->x_current_class_ref = NULL;
10754 f->x_eh_spec_block = NULL;
10755 f->x_in_charge_parm = NULL;
10756 f->x_vtt_parm = NULL;
10757 f->x_return_value = NULL;
10758 f->bindings = NULL;
10760 /* Handle attribute((warn_unused_result)). Relies on gimple input. */
10761 c_warn_unused_result (&DECL_SAVED_TREE (fndecl));
10763 /* Clear out the bits we don't need. */
10764 local_names = NULL;
10765 named_label_uses = NULL;
10767 /* We're leaving the context of this function, so zap cfun. It's still in
10768 DECL_STRUCT_FUNCTION, and we'll restore it in tree_rest_of_compilation. */
10770 current_function_decl = NULL;
10772 /* If this is an in-class inline definition, we may have to pop the
10773 bindings for the template parameters that we added in
10774 maybe_begin_member_template_processing when start_function was
10776 if (inclass_inline)
10777 maybe_end_member_template_processing ();
10779 /* Leave the scope of the class. */
10781 pop_nested_class ();
10787 /* Let the error reporting routines know that we're outside a
10788 function. For a nested function, this value is used in
10789 cxx_pop_function_context and then reset via pop_function_context. */
10790 current_function_decl = NULL_TREE;
10795 /* Create the FUNCTION_DECL for a function definition.
10796 DECLSPECS and DECLARATOR are the parts of the declaration;
10797 they describe the return type and the name of the function,
10798 but twisted together in a fashion that parallels the syntax of C.
10800 This function creates a binding context for the function body
10801 as well as setting up the FUNCTION_DECL in current_function_decl.
10803 Returns a FUNCTION_DECL on success.
10805 If the DECLARATOR is not suitable for a function (it defines a datum
10806 instead), we return 0, which tells yyparse to report a parse error.
10808 May return void_type_node indicating that this method is actually
10809 a friend. See grokfield for more details.
10811 Came here with a `.pushlevel' .
10813 DO NOT MAKE ANY CHANGES TO THIS CODE WITHOUT MAKING CORRESPONDING
10814 CHANGES TO CODE IN `grokfield'. */
10817 start_method (cp_decl_specifier_seq *declspecs,
10818 const cp_declarator *declarator, tree attrlist)
10820 tree fndecl = grokdeclarator (declarator, declspecs, MEMFUNCDEF, 0,
10823 if (fndecl == error_mark_node)
10824 return error_mark_node;
10826 if (fndecl == NULL || TREE_CODE (fndecl) != FUNCTION_DECL)
10828 error ("invalid member function declaration");
10829 return error_mark_node;
10833 cplus_decl_attributes (&fndecl, attrlist, 0);
10835 /* Pass friends other than inline friend functions back. */
10836 if (fndecl == void_type_node)
10839 if (DECL_IN_AGGR_P (fndecl))
10841 if (DECL_CONTEXT (fndecl)
10842 && TREE_CODE( DECL_CONTEXT (fndecl)) != NAMESPACE_DECL)
10843 error ("%qD is already defined in class %qT", fndecl,
10844 DECL_CONTEXT (fndecl));
10845 return void_type_node;
10848 check_template_shadow (fndecl);
10850 DECL_DECLARED_INLINE_P (fndecl) = 1;
10851 if (flag_default_inline)
10852 DECL_INLINE (fndecl) = 1;
10854 /* We process method specializations in finish_struct_1. */
10855 if (processing_template_decl && !DECL_TEMPLATE_SPECIALIZATION (fndecl))
10857 fndecl = push_template_decl (fndecl);
10858 if (fndecl == error_mark_node)
10862 if (! DECL_FRIEND_P (fndecl))
10864 if (TREE_CHAIN (fndecl))
10866 fndecl = copy_node (fndecl);
10867 TREE_CHAIN (fndecl) = NULL_TREE;
10869 grok_special_member_properties (fndecl);
10872 cp_finish_decl (fndecl, NULL_TREE, NULL_TREE, 0);
10874 /* Make a place for the parms. */
10875 begin_scope (sk_function_parms, fndecl);
10877 DECL_IN_AGGR_P (fndecl) = 1;
10881 /* Go through the motions of finishing a function definition.
10882 We don't compile this method until after the whole class has
10885 FINISH_METHOD must return something that looks as though it
10886 came from GROKFIELD (since we are defining a method, after all).
10888 This is called after parsing the body of the function definition.
10889 STMTS is the chain of statements that makes up the function body.
10891 DECL is the ..._DECL that `start_method' provided. */
10894 finish_method (tree decl)
10896 tree fndecl = decl;
10901 if (decl == void_type_node)
10904 old_initial = DECL_INITIAL (fndecl);
10906 /* Undo the level for the parms (from start_method).
10907 This is like poplevel, but it causes nothing to be
10908 saved. Saving information here confuses symbol-table
10909 output routines. Besides, this information will
10910 be correctly output when this method is actually
10913 /* Clear out the meanings of the local variables of this level;
10914 also record in each decl which block it belongs to. */
10916 for (link = current_binding_level->names; link; link = TREE_CHAIN (link))
10918 if (DECL_NAME (link) != NULL_TREE)
10919 pop_binding (DECL_NAME (link), link);
10920 gcc_assert (TREE_CODE (link) != FUNCTION_DECL);
10921 DECL_CONTEXT (link) = NULL_TREE;
10924 poplevel (0, 0, 0);
10926 DECL_INITIAL (fndecl) = old_initial;
10928 /* We used to check if the context of FNDECL was different from
10929 current_class_type as another way to get inside here. This didn't work
10930 for String.cc in libg++. */
10931 if (DECL_FRIEND_P (fndecl))
10933 VEC_safe_push (tree, CLASSTYPE_INLINE_FRIENDS (current_class_type),
10935 decl = void_type_node;
10942 /* VAR is a VAR_DECL. If its type is incomplete, remember VAR so that
10943 we can lay it out later, when and if its type becomes complete. */
10946 maybe_register_incomplete_var (tree var)
10948 gcc_assert (TREE_CODE (var) == VAR_DECL);
10950 /* Keep track of variables with incomplete types. */
10951 if (!processing_template_decl && TREE_TYPE (var) != error_mark_node
10952 && DECL_EXTERNAL (var))
10954 tree inner_type = TREE_TYPE (var);
10956 while (TREE_CODE (inner_type) == ARRAY_TYPE)
10957 inner_type = TREE_TYPE (inner_type);
10958 inner_type = TYPE_MAIN_VARIANT (inner_type);
10960 if ((!COMPLETE_TYPE_P (inner_type) && CLASS_TYPE_P (inner_type))
10961 /* RTTI TD entries are created while defining the type_info. */
10962 || (TYPE_LANG_SPECIFIC (inner_type)
10963 && TYPE_BEING_DEFINED (inner_type)))
10964 incomplete_vars = tree_cons (inner_type, var, incomplete_vars);
10968 /* Called when a class type (given by TYPE) is defined. If there are
10969 any existing VAR_DECLs whose type hsa been completed by this
10970 declaration, update them now. */
10973 complete_vars (tree type)
10975 tree *list = &incomplete_vars;
10977 gcc_assert (CLASS_TYPE_P (type));
10980 if (same_type_p (type, TREE_PURPOSE (*list)))
10982 tree var = TREE_VALUE (*list);
10983 /* Complete the type of the variable. The VAR_DECL itself
10984 will be laid out in expand_expr. */
10985 complete_type (TREE_TYPE (var));
10986 /* Remove this entry from the list. */
10987 *list = TREE_CHAIN (*list);
10990 list = &TREE_CHAIN (*list);
10993 /* Check for pending declarations which may have abstract type. */
10994 complete_type_check_abstract (type);
10997 /* If DECL is of a type which needs a cleanup, build that cleanup
11001 cxx_maybe_build_cleanup (tree decl)
11003 tree type = TREE_TYPE (decl);
11005 if (type != error_mark_node && TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type))
11007 int flags = LOOKUP_NORMAL|LOOKUP_DESTRUCTOR;
11009 bool has_vbases = (TREE_CODE (type) == RECORD_TYPE
11010 && CLASSTYPE_VBASECLASSES (type));
11012 if (TREE_CODE (type) == ARRAY_TYPE)
11016 cxx_mark_addressable (decl);
11017 rval = build_unary_op (ADDR_EXPR, decl, 0);
11020 /* Optimize for space over speed here. */
11021 if (!has_vbases || flag_expensive_optimizations)
11022 flags |= LOOKUP_NONVIRTUAL;
11024 rval = build_delete (TREE_TYPE (rval), rval,
11025 sfk_complete_destructor, flags, 0);
11027 if (has_vbases && !TYPE_HAS_DESTRUCTOR (type))
11028 rval = build_compound_expr (rval, build_vbase_delete (type, decl));
11035 /* When a stmt has been parsed, this function is called. */
11042 /* DECL was originally constructed as a non-static member function,
11043 but turned out to be static. Update it accordingly. */
11046 revert_static_member_fn (tree decl)
11049 tree function = TREE_TYPE (decl);
11050 tree args = TYPE_ARG_TYPES (function);
11052 if (cp_type_quals (TREE_TYPE (TREE_VALUE (args)))
11053 != TYPE_UNQUALIFIED)
11054 error ("static member function %q#D declared with type qualifiers", decl);
11056 args = TREE_CHAIN (args);
11057 tmp = build_function_type (TREE_TYPE (function), args);
11058 tmp = build_qualified_type (tmp, cp_type_quals (function));
11059 tmp = build_exception_variant (tmp,
11060 TYPE_RAISES_EXCEPTIONS (function));
11061 TREE_TYPE (decl) = tmp;
11062 if (DECL_ARGUMENTS (decl))
11063 DECL_ARGUMENTS (decl) = TREE_CHAIN (DECL_ARGUMENTS (decl));
11064 DECL_STATIC_FUNCTION_P (decl) = 1;
11067 /* Initialize the variables used during compilation of a C++
11071 cxx_push_function_context (struct function * f)
11073 struct language_function *p = GGC_CNEW (struct language_function);
11076 /* Whenever we start a new function, we destroy temporaries in the
11078 current_stmt_tree ()->stmts_are_full_exprs_p = 1;
11084 if (DECL_SAVED_FUNCTION_DATA (fn))
11086 /* If we already parsed this function, and we're just expanding it
11087 now, restore saved state. */
11088 *cp_function_chain = *DECL_SAVED_FUNCTION_DATA (fn);
11090 /* We don't need the saved data anymore. Unless this is an inline
11091 function; we need the named return value info for
11092 declare_return_variable. */
11093 if (! DECL_INLINE (fn))
11094 DECL_SAVED_FUNCTION_DATA (fn) = NULL;
11099 /* Free the language-specific parts of F, now that we've finished
11100 compiling the function. */
11103 cxx_pop_function_context (struct function * f)
11108 /* Return which tree structure is used by T, or TS_CP_GENERIC if T is
11109 one of the language-independent trees. */
11111 enum cp_tree_node_structure_enum
11112 cp_tree_node_structure (union lang_tree_node * t)
11114 switch (TREE_CODE (&t->generic))
11116 case DEFAULT_ARG: return TS_CP_DEFAULT_ARG;
11117 case IDENTIFIER_NODE: return TS_CP_IDENTIFIER;
11118 case OVERLOAD: return TS_CP_OVERLOAD;
11119 case TEMPLATE_PARM_INDEX: return TS_CP_TPI;
11120 case TINST_LEVEL: return TS_CP_TINST_LEVEL;
11121 case PTRMEM_CST: return TS_CP_PTRMEM;
11122 case BASELINK: return TS_CP_BASELINK;
11123 default: return TS_CP_GENERIC;
11127 /* Build the void_list_node (void_type_node having been created). */
11129 build_void_list_node (void)
11131 tree t = build_tree_list (NULL_TREE, void_type_node);
11136 cp_missing_noreturn_ok_p (tree decl)
11138 /* A missing noreturn is ok for the `main' function. */
11139 return DECL_MAIN_P (decl);
11142 /* Return the COMDAT group into which DECL should be placed. */
11145 cxx_comdat_group (tree decl)
11149 /* Virtual tables, construction virtual tables, and virtual table
11150 tables all go in a single COMDAT group, named after the primary
11152 if (TREE_CODE (decl) == VAR_DECL && DECL_VTABLE_OR_VTT_P (decl))
11153 name = DECL_ASSEMBLER_NAME (CLASSTYPE_VTABLES (DECL_CONTEXT (decl)));
11154 /* For all other DECLs, the COMDAT group is the mangled name of the
11155 declaration itself. */
11157 name = DECL_ASSEMBLER_NAME (decl);
11159 return IDENTIFIER_POINTER (name);
11162 #include "gt-cp-decl.h"