1 /* Process declarations and variables for C++ compiler.
2 Copyright (C) 1988, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000,
3 2001, 2002, 2003, 2004, 2005 Free Software Foundation, Inc.
4 Contributed by Michael Tiemann (tiemann@cygnus.com)
6 This file is part of GCC.
8 GCC is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2, or (at your option)
13 GCC is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with GCC; see the file COPYING. If not, write to
20 the Free Software Foundation, 59 Temple Place - Suite 330,
21 Boston, MA 02111-1307, USA. */
24 /* Process declarations and symbol lookup for C++ front end.
25 Also constructs types; the standard scalar types at initialization,
26 and structure, union, array and enum types when they are declared. */
28 /* ??? not all decl nodes are given the most useful possible
29 line numbers. For example, the CONST_DECLs for enum values. */
33 #include "coretypes.h"
40 #include "tree-inline.h"
50 #include "diagnostic.h"
53 #include "tree-flow.h"
55 static tree grokparms (cp_parameter_declarator *, tree *);
56 static const char *redeclaration_error_message (tree, tree);
58 static int decl_jump_unsafe (tree);
59 static void require_complete_types_for_parms (tree);
60 static int ambi_op_p (enum tree_code);
61 static int unary_op_p (enum tree_code);
62 static void push_local_name (tree);
63 static tree grok_reference_init (tree, tree, tree, tree *);
64 static tree grokfndecl (tree, tree, tree, tree, tree, int,
65 enum overload_flags, cp_cv_quals,
66 tree, int, int, int, int, int, int, tree,
68 static tree grokvardecl (tree, tree, const cp_decl_specifier_seq *,
70 static void record_unknown_type (tree, const char *);
71 static tree builtin_function_1 (const char *, tree, tree,
72 enum built_in_function code,
73 enum built_in_class cl, const char *,
75 static tree build_library_fn_1 (tree, enum tree_code, tree);
76 static int member_function_or_else (tree, tree, enum overload_flags);
77 static void bad_specifiers (tree, const char *, int, int, int, int,
79 static void check_for_uninitialized_const_var (tree);
80 static hashval_t typename_hash (const void *);
81 static int typename_compare (const void *, const void *);
82 static tree local_variable_p_walkfn (tree *, int *, void *);
83 static tree record_builtin_java_type (const char *, int);
84 static const char *tag_name (enum tag_types);
85 static tree lookup_and_check_tag (enum tag_types, tree, tag_scope, bool);
86 static int walk_namespaces_r (tree, walk_namespaces_fn, void *);
87 static int walk_globals_r (tree, void*);
88 static int walk_vtables_r (tree, void*);
89 static tree make_label_decl (tree, int);
90 static void use_label (tree);
91 static void check_previous_goto_1 (tree, struct cp_binding_level *, tree,
93 static void check_previous_goto (struct named_label_use_list *);
94 static void check_switch_goto (struct cp_binding_level *);
95 static void check_previous_gotos (tree);
96 static void pop_label (tree, tree);
97 static void pop_labels (tree);
98 static void maybe_deduce_size_from_array_init (tree, tree);
99 static void layout_var_decl (tree);
100 static void maybe_commonize_var (tree);
101 static tree check_initializer (tree, tree, int, tree *);
102 static void make_rtl_for_nonlocal_decl (tree, tree, const char *);
103 static void save_function_data (tree);
104 static void check_function_type (tree, tree);
105 static void finish_constructor_body (void);
106 static void begin_destructor_body (void);
107 static void finish_destructor_body (void);
108 static tree create_array_type_for_decl (tree, tree, tree);
109 static tree get_atexit_node (void);
110 static tree get_dso_handle_node (void);
111 static tree start_cleanup_fn (void);
112 static void end_cleanup_fn (void);
113 static tree cp_make_fname_decl (tree, int);
114 static void initialize_predefined_identifiers (void);
115 static tree check_special_function_return_type
116 (special_function_kind, tree, tree);
117 static tree push_cp_library_fn (enum tree_code, tree);
118 static tree build_cp_library_fn (tree, enum tree_code, tree);
119 static void store_parm_decls (tree);
120 static void initialize_local_var (tree, tree);
121 static void expand_static_init (tree, tree);
122 static tree next_initializable_field (tree);
123 static tree reshape_init (tree, tree *);
125 /* Erroneous argument lists can use this *IFF* they do not modify it. */
126 tree error_mark_list;
128 /* The following symbols are subsumed in the cp_global_trees array, and
129 listed here individually for documentation purposes.
132 tree wchar_decl_node;
134 tree vtable_entry_type;
135 tree delta_type_node;
136 tree __t_desc_type_node;
137 tree ti_desc_type_node;
138 tree bltn_desc_type_node, ptr_desc_type_node;
139 tree ary_desc_type_node, func_desc_type_node, enum_desc_type_node;
140 tree class_desc_type_node, si_class_desc_type_node, vmi_class_desc_type_node;
141 tree ptm_desc_type_node;
142 tree base_desc_type_node;
144 tree class_type_node;
145 tree unknown_type_node;
147 Array type `vtable_entry_type[]'
150 tree vtbl_ptr_type_node;
157 A FUNCTION_DECL which can call `abort'. Not necessarily the
158 one that the user will declare, but sufficient to be called
159 by routines that want to abort the program.
163 The FUNCTION_DECL for the default `::operator delete'.
165 tree global_delete_fndecl;
168 tree type_info_type_node, tinfo_decl_id, tinfo_decl_type;
173 tree cp_global_trees[CPTI_MAX];
175 /* Indicates that there is a type value in some namespace, although
176 that is not necessarily in scope at the moment. */
178 tree global_type_node;
180 /* The node that holds the "name" of the global scope. */
181 tree global_scope_name;
183 /* Used only for jumps to as-yet undefined labels, since jumps to
184 defined labels can have their validity checked immediately. */
186 struct named_label_use_list GTY(())
188 struct cp_binding_level *binding_level;
191 location_t o_goto_locus;
192 struct named_label_use_list *next;
195 #define named_label_uses cp_function_chain->x_named_label_uses
197 #define local_names cp_function_chain->x_local_names
199 /* A list of objects which have constructors or destructors
200 which reside in the global scope. The decl is stored in
201 the TREE_VALUE slot and the initializer is stored
202 in the TREE_PURPOSE slot. */
203 tree static_aggregates;
207 /* A node for the integer constants 2, and 3. */
209 tree integer_two_node, integer_three_node;
211 /* A list of all LABEL_DECLs in the function that have names. Here so
212 we can clear out their names' definitions at the end of the
213 function, and so we can check the validity of jumps to these labels. */
215 struct named_label_list GTY(())
217 struct cp_binding_level *binding_level;
222 struct named_label_list *next;
223 unsigned int in_try_scope : 1;
224 unsigned int in_catch_scope : 1;
227 #define named_labels cp_function_chain->x_named_labels
229 /* The number of function bodies which we are currently processing.
230 (Zero if we are at namespace scope, one inside the body of a
231 function, two inside the body of a function in a local class, etc.) */
234 /* States indicating how grokdeclarator() should handle declspecs marked
235 with __attribute__((deprecated)). An object declared as
236 __attribute__((deprecated)) suppresses warnings of uses of other
239 enum deprecated_states {
244 static enum deprecated_states deprecated_state = DEPRECATED_NORMAL;
246 /* True if a declaration with an `extern' linkage specifier is being
248 bool have_extern_spec;
251 /* A TREE_LIST of VAR_DECLs. The TREE_PURPOSE is a RECORD_TYPE or
252 UNION_TYPE; the TREE_VALUE is a VAR_DECL with that type. At the
253 time the VAR_DECL was declared, the type was incomplete. */
255 static GTY(()) tree incomplete_vars;
257 /* Returns the kind of template specialization we are currently
258 processing, given that it's declaration contained N_CLASS_SCOPES
259 explicit scope qualifications. */
262 current_tmpl_spec_kind (int n_class_scopes)
264 int n_template_parm_scopes = 0;
265 int seen_specialization_p = 0;
266 int innermost_specialization_p = 0;
267 struct cp_binding_level *b;
269 /* Scan through the template parameter scopes. */
270 for (b = current_binding_level;
271 b->kind == sk_template_parms;
274 /* If we see a specialization scope inside a parameter scope,
275 then something is wrong. That corresponds to a declaration
278 template <class T> template <> ...
280 which is always invalid since [temp.expl.spec] forbids the
281 specialization of a class member template if the enclosing
282 class templates are not explicitly specialized as well. */
283 if (b->explicit_spec_p)
285 if (n_template_parm_scopes == 0)
286 innermost_specialization_p = 1;
288 seen_specialization_p = 1;
290 else if (seen_specialization_p == 1)
291 return tsk_invalid_member_spec;
293 ++n_template_parm_scopes;
296 /* Handle explicit instantiations. */
297 if (processing_explicit_instantiation)
299 if (n_template_parm_scopes != 0)
300 /* We've seen a template parameter list during an explicit
301 instantiation. For example:
303 template <class T> template void f(int);
305 This is erroneous. */
306 return tsk_invalid_expl_inst;
308 return tsk_expl_inst;
311 if (n_template_parm_scopes < n_class_scopes)
312 /* We've not seen enough template headers to match all the
313 specialized classes present. For example:
315 template <class T> void R<T>::S<T>::f(int);
317 This is invalid; there needs to be one set of template
318 parameters for each class. */
319 return tsk_insufficient_parms;
320 else if (n_template_parm_scopes == n_class_scopes)
321 /* We're processing a non-template declaration (even though it may
322 be a member of a template class.) For example:
324 template <class T> void S<T>::f(int);
326 The `class T' maches the `S<T>', leaving no template headers
327 corresponding to the `f'. */
329 else if (n_template_parm_scopes > n_class_scopes + 1)
330 /* We've got too many template headers. For example:
332 template <> template <class T> void f (T);
334 There need to be more enclosing classes. */
335 return tsk_excessive_parms;
337 /* This must be a template. It's of the form:
339 template <class T> template <class U> void S<T>::f(U);
341 This is a specialization if the innermost level was a
342 specialization; otherwise it's just a definition of the
344 return innermost_specialization_p ? tsk_expl_spec : tsk_template;
347 /* Exit the current scope. */
355 /* When a label goes out of scope, check to see if that label was used
356 in a valid manner, and issue any appropriate warnings or errors. */
359 pop_label (tree label, tree old_value)
361 if (!processing_template_decl)
363 if (DECL_INITIAL (label) == NULL_TREE)
367 cp_error_at ("label %qD used but not defined", label);
368 #ifdef USE_MAPPED_LOCATION
369 location = input_location; /* FIXME want (input_filename, (line)0) */
371 location.file = input_filename;
374 /* Avoid crashing later. */
375 define_label (location, DECL_NAME (label));
377 else if (warn_unused_label && !TREE_USED (label))
378 cp_warning_at ("label %qD defined but not used", label);
381 SET_IDENTIFIER_LABEL_VALUE (DECL_NAME (label), old_value);
384 /* At the end of a function, all labels declared within the function
385 go out of scope. BLOCK is the top-level block for the
389 pop_labels (tree block)
391 struct named_label_list *link;
393 /* Clear out the definitions of all label names, since their scopes
395 for (link = named_labels; link; link = link->next)
397 pop_label (link->label_decl, link->old_value);
398 /* Put the labels into the "variables" of the top-level block,
399 so debugger can see them. */
400 TREE_CHAIN (link->label_decl) = BLOCK_VARS (block);
401 BLOCK_VARS (block) = link->label_decl;
407 /* The following two routines are used to interface to Objective-C++.
408 The binding level is purposely treated as an opaque type. */
411 objc_get_current_scope (void)
413 return current_binding_level;
416 /* The following routine is used by the NeXT-style SJLJ exceptions;
417 variables get marked 'volatile' so as to not be clobbered by
418 _setjmp()/_longjmp() calls. All variables in the current scope,
419 as well as parent scopes up to (but not including) ENCLOSING_BLK
420 shall be thusly marked. */
423 objc_mark_locals_volatile (void *enclosing_blk)
425 struct cp_binding_level *scope;
427 for (scope = current_binding_level;
428 scope && scope != enclosing_blk && scope->kind == sk_block;
429 scope = scope->level_chain)
433 for (decl = scope->names; decl; decl = TREE_CHAIN (decl))
435 if (TREE_CODE (decl) == VAR_DECL)
437 DECL_REGISTER (decl) = 0;
438 TREE_THIS_VOLATILE (decl) = 1;
444 /* Exit a binding level.
445 Pop the level off, and restore the state of the identifier-decl mappings
446 that were in effect when this level was entered.
448 If KEEP == 1, this level had explicit declarations, so
449 and create a "block" (a BLOCK node) for the level
450 to record its declarations and subblocks for symbol table output.
452 If FUNCTIONBODY is nonzero, this level is the body of a function,
453 so create a block as if KEEP were set and also clear out all
456 If REVERSE is nonzero, reverse the order of decls before putting
457 them into the BLOCK. */
460 poplevel (int keep, int reverse, int functionbody)
463 /* The chain of decls was accumulated in reverse order.
464 Put it into forward order, just for cleanliness. */
466 int tmp = functionbody;
467 int real_functionbody;
471 int leaving_for_scope;
474 timevar_push (TV_NAME_LOOKUP);
479 gcc_assert (current_binding_level->kind != sk_class);
481 real_functionbody = (current_binding_level->kind == sk_cleanup
482 ? ((functionbody = 0), tmp) : functionbody);
483 subblocks = functionbody >= 0 ? current_binding_level->blocks : 0;
485 gcc_assert (!VEC_length(cp_class_binding,
486 current_binding_level->class_shadowed));
488 /* We used to use KEEP == 2 to indicate that the new block should go
489 at the beginning of the list of blocks at this binding level,
490 rather than the end. This hack is no longer used. */
491 gcc_assert (keep == 0 || keep == 1);
493 if (current_binding_level->keep)
496 /* Any uses of undefined labels, and any defined labels, now operate
497 under constraints of next binding contour. */
498 if (cfun && !functionbody)
500 struct cp_binding_level *level_chain;
501 level_chain = current_binding_level->level_chain;
504 struct named_label_use_list *uses;
505 struct named_label_list *labels;
506 for (labels = named_labels; labels; labels = labels->next)
507 if (labels->binding_level == current_binding_level)
510 if (current_binding_level->kind == sk_try)
511 labels->in_try_scope = 1;
512 if (current_binding_level->kind == sk_catch)
513 labels->in_catch_scope = 1;
514 for (decl = labels->names_in_scope; decl;
515 decl = TREE_CHAIN (decl))
516 if (decl_jump_unsafe (decl))
517 labels->bad_decls = tree_cons (NULL_TREE, decl,
519 labels->binding_level = level_chain;
520 labels->names_in_scope = level_chain->names;
523 for (uses = named_label_uses; uses; uses = uses->next)
524 if (uses->binding_level == current_binding_level)
526 uses->binding_level = level_chain;
527 uses->names_in_scope = level_chain->names;
532 /* Get the decls in the order they were written.
533 Usually current_binding_level->names is in reverse order.
534 But parameter decls were previously put in forward order. */
537 current_binding_level->names
538 = decls = nreverse (current_binding_level->names);
540 decls = current_binding_level->names;
542 /* If there were any declarations or structure tags in that level,
543 or if this level is a function body,
544 create a BLOCK to record them for the life of this function. */
546 if (keep == 1 || functionbody)
547 block = make_node (BLOCK);
548 if (block != NULL_TREE)
550 BLOCK_VARS (block) = decls;
551 BLOCK_SUBBLOCKS (block) = subblocks;
554 /* In each subblock, record that this is its superior. */
556 for (link = subblocks; link; link = TREE_CHAIN (link))
557 BLOCK_SUPERCONTEXT (link) = block;
559 /* We still support the old for-scope rules, whereby the variables
560 in a for-init statement were in scope after the for-statement
561 ended. We only use the new rules if flag_new_for_scope is
564 = current_binding_level->kind == sk_for && flag_new_for_scope == 1;
566 /* Before we remove the declarations first check for unused variables. */
567 if (warn_unused_variable
568 && !processing_template_decl)
569 for (decl = getdecls (); decl; decl = TREE_CHAIN (decl))
570 if (TREE_CODE (decl) == VAR_DECL
571 && ! TREE_USED (decl)
572 && ! DECL_IN_SYSTEM_HEADER (decl)
573 && DECL_NAME (decl) && ! DECL_ARTIFICIAL (decl))
574 warning ("%Junused variable %qD", decl, decl);
576 /* Remove declarations for all the DECLs in this level. */
577 for (link = decls; link; link = TREE_CHAIN (link))
579 if (leaving_for_scope && TREE_CODE (link) == VAR_DECL
582 tree name = DECL_NAME (link);
586 ob = outer_binding (name,
587 IDENTIFIER_BINDING (name),
590 ns_binding = IDENTIFIER_NAMESPACE_VALUE (name);
592 ns_binding = NULL_TREE;
594 if (ob && ob->scope == current_binding_level->level_chain)
595 /* We have something like:
600 and we are leaving the `for' scope. There's no reason to
601 keep the binding of the inner `i' in this case. */
602 pop_binding (name, link);
603 else if ((ob && (TREE_CODE (ob->value) == TYPE_DECL))
604 || (ns_binding && TREE_CODE (ns_binding) == TYPE_DECL))
605 /* Here, we have something like:
613 We must pop the for-scope binding so we know what's a
614 type and what isn't. */
615 pop_binding (name, link);
618 /* Mark this VAR_DECL as dead so that we can tell we left it
619 there only for backward compatibility. */
620 DECL_DEAD_FOR_LOCAL (link) = 1;
622 /* Keep track of what should have happened when we
623 popped the binding. */
625 DECL_SHADOWED_FOR_VAR (link) = ob->value;
627 /* Add it to the list of dead variables in the next
628 outermost binding to that we can remove these when we
629 leave that binding. */
630 current_binding_level->level_chain->dead_vars_from_for
631 = tree_cons (NULL_TREE, link,
632 current_binding_level->level_chain->
635 /* Although we don't pop the cxx_binding, we do clear
636 its SCOPE since the scope is going away now. */
637 IDENTIFIER_BINDING (name)->scope
638 = current_binding_level->level_chain;
645 /* Remove the binding. */
648 if (TREE_CODE (decl) == TREE_LIST)
649 decl = TREE_VALUE (decl);
652 if (TREE_CODE (name) == OVERLOAD)
653 name = OVL_FUNCTION (name);
655 gcc_assert (DECL_P (name));
656 pop_binding (DECL_NAME (name), decl);
660 /* Remove declarations for any `for' variables from inner scopes
661 that we kept around. */
662 for (link = current_binding_level->dead_vars_from_for;
663 link; link = TREE_CHAIN (link))
664 pop_binding (DECL_NAME (TREE_VALUE (link)), TREE_VALUE (link));
666 /* Restore the IDENTIFIER_TYPE_VALUEs. */
667 for (link = current_binding_level->type_shadowed;
668 link; link = TREE_CHAIN (link))
669 SET_IDENTIFIER_TYPE_VALUE (TREE_PURPOSE (link), TREE_VALUE (link));
671 /* Restore the IDENTIFIER_LABEL_VALUEs for local labels. */
672 for (link = current_binding_level->shadowed_labels;
674 link = TREE_CHAIN (link))
675 pop_label (TREE_VALUE (link), TREE_PURPOSE (link));
677 /* There may be OVERLOADs (wrapped in TREE_LISTs) on the BLOCK_VARs
678 list if a `using' declaration put them there. The debugging
679 back-ends won't understand OVERLOAD, so we remove them here.
680 Because the BLOCK_VARS are (temporarily) shared with
681 CURRENT_BINDING_LEVEL->NAMES we must do this fixup after we have
682 popped all the bindings. */
687 for (d = &BLOCK_VARS (block); *d; )
689 if (TREE_CODE (*d) == TREE_LIST)
690 *d = TREE_CHAIN (*d);
692 d = &TREE_CHAIN (*d);
696 /* If the level being exited is the top level of a function,
697 check over all the labels. */
700 /* Since this is the top level block of a function, the vars are
701 the function's parameters. Don't leave them in the BLOCK
702 because they are found in the FUNCTION_DECL instead. */
703 BLOCK_VARS (block) = 0;
707 kind = current_binding_level->kind;
708 if (kind == sk_cleanup)
712 /* If this is a temporary binding created for a cleanup, then we'll
713 have pushed a statement list level. Pop that, create a new
714 BIND_EXPR for the block, and insert it into the stream. */
715 stmt = pop_stmt_list (current_binding_level->statement_list);
716 stmt = c_build_bind_expr (block, stmt);
722 DECL_INITIAL (current_function_decl) = block;
724 current_binding_level->blocks
725 = chainon (current_binding_level->blocks, block);
727 /* If we did not make a block for the level just exited,
728 any blocks made for inner levels
729 (since they cannot be recorded as subblocks in that level)
730 must be carried forward so they will later become subblocks
731 of something else. */
733 current_binding_level->blocks
734 = chainon (current_binding_level->blocks, subblocks);
736 /* Each and every BLOCK node created here in `poplevel' is important
737 (e.g. for proper debugging information) so if we created one
738 earlier, mark it as "used". */
740 TREE_USED (block) = 1;
742 /* All temporary bindings created for cleanups are popped silently. */
743 if (kind == sk_cleanup)
746 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, block);
749 /* Delete the node BLOCK from the current binding level.
750 This is used for the block inside a stmt expr ({...})
751 so that the block can be reinserted where appropriate. */
754 delete_block (tree block)
757 if (current_binding_level->blocks == block)
758 current_binding_level->blocks = TREE_CHAIN (block);
759 for (t = current_binding_level->blocks; t;)
761 if (TREE_CHAIN (t) == block)
762 TREE_CHAIN (t) = TREE_CHAIN (block);
766 TREE_CHAIN (block) = NULL_TREE;
767 /* Clear TREE_USED which is always set by poplevel.
768 The flag is set again if insert_block is called. */
769 TREE_USED (block) = 0;
772 /* Insert BLOCK at the end of the list of subblocks of the
773 current binding level. This is used when a BIND_EXPR is expanded,
774 to handle the BLOCK node inside the BIND_EXPR. */
777 insert_block (tree block)
779 TREE_USED (block) = 1;
780 current_binding_level->blocks
781 = chainon (current_binding_level->blocks, block);
784 /* Returns nonzero if T is a virtual function table. */
787 vtable_decl_p (tree t, void* data ATTRIBUTE_UNUSED )
789 return (TREE_CODE (t) == VAR_DECL && DECL_VIRTUAL_P (t));
792 /* Returns nonzero if T is a TYPE_DECL for a type with virtual
796 vtype_decl_p (tree t, void *data ATTRIBUTE_UNUSED )
798 return (TREE_CODE (t) == TYPE_DECL
799 && TREE_CODE (TREE_TYPE (t)) == RECORD_TYPE
800 && TYPE_POLYMORPHIC_P (TREE_TYPE (t)));
803 struct walk_globals_data {
809 /* Walk the vtable declarations in NAMESPACE. Whenever one is found
810 for which P returns nonzero, call F with its address. If any call
811 to F returns a nonzero value, return a nonzero value. */
814 walk_vtables_r (tree namespace, void* data)
816 struct walk_globals_data* wgd = (struct walk_globals_data *) data;
817 walk_globals_fn f = wgd->f;
819 tree decl = NAMESPACE_LEVEL (namespace)->vtables;
822 for (; decl ; decl = TREE_CHAIN (decl))
823 result |= (*f) (&decl, d);
828 /* Walk the vtable declarations. Whenever one is found for which P
829 returns nonzero, call F with its address. If any call to F
830 returns a nonzero value, return a nonzero value. */
832 walk_vtables (walk_globals_pred p, walk_globals_fn f, void *data)
834 struct walk_globals_data wgd;
839 return walk_namespaces (walk_vtables_r, &wgd);
842 /* Walk all the namespaces contained NAMESPACE, including NAMESPACE
843 itself, calling F for each. The DATA is passed to F as well. */
846 walk_namespaces_r (tree namespace, walk_namespaces_fn f, void* data)
849 tree current = NAMESPACE_LEVEL (namespace)->namespaces;
851 result |= (*f) (namespace, data);
853 for (; current; current = TREE_CHAIN (current))
854 result |= walk_namespaces_r (current, f, data);
859 /* Walk all the namespaces, calling F for each. The DATA is passed to
863 walk_namespaces (walk_namespaces_fn f, void* data)
865 return walk_namespaces_r (global_namespace, f, data);
868 /* Walk the global declarations in NAMESPACE. Whenever one is found
869 for which P returns nonzero, call F with its address. If any call
870 to F returns a nonzero value, return a nonzero value. */
873 walk_globals_r (tree namespace, void* data)
875 struct walk_globals_data* wgd = (struct walk_globals_data *) data;
876 walk_globals_pred p = wgd->p;
877 walk_globals_fn f = wgd->f;
882 t = &NAMESPACE_LEVEL (namespace)->names;
889 result |= (*f) (t, d);
891 /* If F changed *T, then *T still points at the next item to
894 t = &TREE_CHAIN (*t);
900 /* Walk the global declarations. Whenever one is found for which P
901 returns true, call F with its address. If any call to F
902 returns true, return true. */
905 walk_globals (walk_globals_pred p, walk_globals_fn f, void *data)
907 struct walk_globals_data wgd;
912 return walk_namespaces (walk_globals_r, &wgd);
915 /* Call wrapup_globals_declarations for the globals in NAMESPACE. If
916 DATA is non-NULL, this is the last time we will call
917 wrapup_global_declarations for this NAMESPACE. */
920 wrapup_globals_for_namespace (tree namespace, void* data)
922 struct cp_binding_level *level = NAMESPACE_LEVEL (namespace);
923 varray_type statics = level->static_decls;
924 tree *vec = &VARRAY_TREE (statics, 0);
925 int len = VARRAY_ACTIVE_SIZE (statics);
926 int last_time = (data != 0);
930 check_global_declarations (vec, len);
934 /* Write out any globals that need to be output. */
935 return wrapup_global_declarations (vec, len);
939 /* In C++, you don't have to write `struct S' to refer to `S'; you
940 can just use `S'. We accomplish this by creating a TYPE_DECL as
941 if the user had written `typedef struct S S'. Create and return
942 the TYPE_DECL for TYPE. */
945 create_implicit_typedef (tree name, tree type)
949 decl = build_decl (TYPE_DECL, name, type);
950 DECL_ARTIFICIAL (decl) = 1;
951 /* There are other implicit type declarations, like the one *within*
952 a class that allows you to write `S::S'. We must distinguish
954 SET_DECL_IMPLICIT_TYPEDEF_P (decl);
955 TYPE_NAME (type) = decl;
960 /* Remember a local name for name-mangling purposes. */
963 push_local_name (tree decl)
968 timevar_push (TV_NAME_LOOKUP);
970 VARRAY_TREE_INIT (local_names, 8, "local_names");
972 name = DECL_NAME (decl);
974 nelts = VARRAY_ACTIVE_SIZE (local_names);
975 for (i = 0; i < nelts; i++)
977 t = VARRAY_TREE (local_names, i);
978 if (DECL_NAME (t) == name)
980 if (!DECL_LANG_SPECIFIC (decl))
981 retrofit_lang_decl (decl);
982 DECL_LANG_SPECIFIC (decl)->decl_flags.u2sel = 1;
983 if (DECL_LANG_SPECIFIC (t))
984 DECL_DISCRIMINATOR (decl) = DECL_DISCRIMINATOR (t) + 1;
986 DECL_DISCRIMINATOR (decl) = 1;
988 VARRAY_TREE (local_names, i) = decl;
989 timevar_pop (TV_NAME_LOOKUP);
994 VARRAY_PUSH_TREE (local_names, decl);
995 timevar_pop (TV_NAME_LOOKUP);
998 /* Subroutine of duplicate_decls: return truthvalue of whether
999 or not types of these decls match.
1001 For C++, we must compare the parameter list so that `int' can match
1002 `int&' in a parameter position, but `int&' is not confused with
1006 decls_match (tree newdecl, tree olddecl)
1010 if (newdecl == olddecl)
1013 if (TREE_CODE (newdecl) != TREE_CODE (olddecl))
1014 /* If the two DECLs are not even the same kind of thing, we're not
1015 interested in their types. */
1018 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1020 tree f1 = TREE_TYPE (newdecl);
1021 tree f2 = TREE_TYPE (olddecl);
1022 tree p1 = TYPE_ARG_TYPES (f1);
1023 tree p2 = TYPE_ARG_TYPES (f2);
1025 if (CP_DECL_CONTEXT (newdecl) != CP_DECL_CONTEXT (olddecl)
1026 && ! (DECL_EXTERN_C_P (newdecl)
1027 && DECL_EXTERN_C_P (olddecl)))
1030 if (TREE_CODE (f1) != TREE_CODE (f2))
1033 if (same_type_p (TREE_TYPE (f1), TREE_TYPE (f2)))
1035 if (p2 == NULL_TREE && DECL_EXTERN_C_P (olddecl)
1036 && (DECL_BUILT_IN (olddecl)
1037 #ifndef NO_IMPLICIT_EXTERN_C
1038 || (DECL_IN_SYSTEM_HEADER (newdecl) && !DECL_CLASS_SCOPE_P (newdecl))
1039 || (DECL_IN_SYSTEM_HEADER (olddecl) && !DECL_CLASS_SCOPE_P (olddecl))
1043 types_match = self_promoting_args_p (p1);
1044 if (p1 == void_list_node)
1045 TREE_TYPE (newdecl) = TREE_TYPE (olddecl);
1047 #ifndef NO_IMPLICIT_EXTERN_C
1048 else if (p1 == NULL_TREE
1049 && (DECL_EXTERN_C_P (olddecl)
1050 && DECL_IN_SYSTEM_HEADER (olddecl)
1051 && !DECL_CLASS_SCOPE_P (olddecl))
1052 && (DECL_EXTERN_C_P (newdecl)
1053 && DECL_IN_SYSTEM_HEADER (newdecl)
1054 && !DECL_CLASS_SCOPE_P (newdecl)))
1056 types_match = self_promoting_args_p (p2);
1057 TREE_TYPE (newdecl) = TREE_TYPE (olddecl);
1061 types_match = compparms (p1, p2);
1066 else if (TREE_CODE (newdecl) == TEMPLATE_DECL)
1068 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl))
1069 != TREE_CODE (DECL_TEMPLATE_RESULT (olddecl)))
1072 if (!comp_template_parms (DECL_TEMPLATE_PARMS (newdecl),
1073 DECL_TEMPLATE_PARMS (olddecl)))
1076 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == TYPE_DECL)
1077 types_match = same_type_p (TREE_TYPE (DECL_TEMPLATE_RESULT (olddecl)),
1078 TREE_TYPE (DECL_TEMPLATE_RESULT (newdecl)));
1080 types_match = decls_match (DECL_TEMPLATE_RESULT (olddecl),
1081 DECL_TEMPLATE_RESULT (newdecl));
1085 if (TREE_TYPE (newdecl) == error_mark_node)
1086 types_match = TREE_TYPE (olddecl) == error_mark_node;
1087 else if (TREE_TYPE (olddecl) == NULL_TREE)
1088 types_match = TREE_TYPE (newdecl) == NULL_TREE;
1089 else if (TREE_TYPE (newdecl) == NULL_TREE)
1092 types_match = comptypes (TREE_TYPE (newdecl),
1093 TREE_TYPE (olddecl),
1094 COMPARE_REDECLARATION);
1100 /* If NEWDECL is `static' and an `extern' was seen previously,
1101 warn about it. OLDDECL is the previous declaration.
1103 Note that this does not apply to the C++ case of declaring
1104 a variable `extern const' and then later `const'.
1106 Don't complain about built-in functions, since they are beyond
1107 the user's control. */
1110 warn_extern_redeclared_static (tree newdecl, tree olddecl)
1114 if (TREE_CODE (newdecl) == TYPE_DECL
1115 || TREE_CODE (newdecl) == TEMPLATE_DECL
1116 || TREE_CODE (newdecl) == CONST_DECL
1117 || TREE_CODE (newdecl) == NAMESPACE_DECL)
1120 /* Don't get confused by static member functions; that's a different
1122 if (TREE_CODE (newdecl) == FUNCTION_DECL
1123 && DECL_STATIC_FUNCTION_P (newdecl))
1126 /* If the old declaration was `static', or the new one isn't, then
1127 then everything is OK. */
1128 if (DECL_THIS_STATIC (olddecl) || !DECL_THIS_STATIC (newdecl))
1131 /* It's OK to declare a builtin function as `static'. */
1132 if (TREE_CODE (olddecl) == FUNCTION_DECL
1133 && DECL_ARTIFICIAL (olddecl))
1136 name = DECL_ASSEMBLER_NAME (newdecl);
1137 pedwarn ("%qD was declared %<extern%> and later %<static%>", newdecl);
1138 cp_pedwarn_at ("previous declaration of %qD", olddecl);
1141 /* If NEWDECL is a redeclaration of OLDDECL, merge the declarations.
1142 If the redeclaration is invalid, a diagnostic is issued, and the
1143 error_mark_node is returned. Otherwise, OLDDECL is returned.
1145 If NEWDECL is not a redeclaration of OLDDECL, NULL_TREE is
1149 duplicate_decls (tree newdecl, tree olddecl)
1151 unsigned olddecl_uid = DECL_UID (olddecl);
1152 int olddecl_friend = 0, types_match = 0;
1153 int new_defines_function = 0;
1155 if (newdecl == olddecl)
1158 types_match = decls_match (newdecl, olddecl);
1160 /* If either the type of the new decl or the type of the old decl is an
1161 error_mark_node, then that implies that we have already issued an
1162 error (earlier) for some bogus type specification, and in that case,
1163 it is rather pointless to harass the user with yet more error message
1164 about the same declaration, so just pretend the types match here. */
1165 if (TREE_TYPE (newdecl) == error_mark_node
1166 || TREE_TYPE (olddecl) == error_mark_node)
1169 if (DECL_P (olddecl)
1170 && TREE_CODE (newdecl) == FUNCTION_DECL
1171 && TREE_CODE (olddecl) == FUNCTION_DECL
1172 && (DECL_UNINLINABLE (newdecl) || DECL_UNINLINABLE (olddecl)))
1174 if (DECL_DECLARED_INLINE_P (newdecl)
1175 && DECL_UNINLINABLE (newdecl)
1176 && lookup_attribute ("noinline", DECL_ATTRIBUTES (newdecl)))
1177 /* Already warned elsewhere. */;
1178 else if (DECL_DECLARED_INLINE_P (olddecl)
1179 && DECL_UNINLINABLE (olddecl)
1180 && lookup_attribute ("noinline", DECL_ATTRIBUTES (olddecl)))
1181 /* Already warned. */;
1182 else if (DECL_DECLARED_INLINE_P (newdecl)
1183 && DECL_UNINLINABLE (olddecl)
1184 && lookup_attribute ("noinline", DECL_ATTRIBUTES (olddecl)))
1186 warning ("%Jfunction %qD redeclared as inline", newdecl, newdecl);
1187 warning ("%Jprevious declaration of %qD with attribute noinline",
1190 else if (DECL_DECLARED_INLINE_P (olddecl)
1191 && DECL_UNINLINABLE (newdecl)
1192 && lookup_attribute ("noinline", DECL_ATTRIBUTES (newdecl)))
1194 warning ("%Jfunction %qD redeclared with attribute noinline",
1196 warning ("%Jprevious declaration of %qD was inline",
1201 /* Check for redeclaration and other discrepancies. */
1202 if (TREE_CODE (olddecl) == FUNCTION_DECL
1203 && DECL_ARTIFICIAL (olddecl))
1205 if (TREE_CODE (newdecl) != FUNCTION_DECL)
1207 /* Avoid warnings redeclaring anticipated built-ins. */
1208 if (DECL_ANTICIPATED (olddecl))
1211 /* If you declare a built-in or predefined function name as static,
1212 the old definition is overridden, but optionally warn this was a
1213 bad choice of name. */
1214 if (! TREE_PUBLIC (newdecl))
1217 warning ("shadowing %s function %q#D",
1218 DECL_BUILT_IN (olddecl) ? "built-in" : "library",
1220 /* Discard the old built-in function. */
1223 /* If the built-in is not ansi, then programs can override
1224 it even globally without an error. */
1225 else if (! DECL_BUILT_IN (olddecl))
1226 warning ("library function %q#D redeclared as non-function %q#D",
1230 error ("declaration of %q#D", newdecl);
1231 error ("conflicts with built-in declaration %q#D",
1236 else if (!types_match)
1238 /* Avoid warnings redeclaring anticipated built-ins. */
1239 if (DECL_ANTICIPATED (olddecl))
1241 /* Deal with fileptr_type_node. FILE type is not known
1242 at the time we create the builtins. */
1245 for (t1 = TYPE_ARG_TYPES (TREE_TYPE (newdecl)),
1246 t2 = TYPE_ARG_TYPES (TREE_TYPE (olddecl));
1248 t1 = TREE_CHAIN (t1), t2 = TREE_CHAIN (t2))
1251 else if (TREE_VALUE (t2) == fileptr_type_node)
1253 tree t = TREE_VALUE (t1);
1255 if (TREE_CODE (t) == POINTER_TYPE
1256 && TYPE_NAME (TREE_TYPE (t))
1257 && DECL_NAME (TYPE_NAME (TREE_TYPE (t)))
1258 == get_identifier ("FILE")
1259 && compparms (TREE_CHAIN (t1), TREE_CHAIN (t2)))
1261 tree oldargs = TYPE_ARG_TYPES (TREE_TYPE (olddecl));
1263 TYPE_ARG_TYPES (TREE_TYPE (olddecl))
1264 = TYPE_ARG_TYPES (TREE_TYPE (newdecl));
1265 types_match = decls_match (newdecl, olddecl);
1267 return duplicate_decls (newdecl, olddecl);
1268 TYPE_ARG_TYPES (TREE_TYPE (olddecl)) = oldargs;
1271 else if (! same_type_p (TREE_VALUE (t1), TREE_VALUE (t2)))
1274 else if ((DECL_EXTERN_C_P (newdecl)
1275 && DECL_EXTERN_C_P (olddecl))
1276 || compparms (TYPE_ARG_TYPES (TREE_TYPE (newdecl)),
1277 TYPE_ARG_TYPES (TREE_TYPE (olddecl))))
1279 /* A near match; override the builtin. */
1281 if (TREE_PUBLIC (newdecl))
1283 warning ("new declaration %q#D", newdecl);
1284 warning ("ambiguates built-in declaration %q#D",
1287 else if (warn_shadow)
1288 warning ("shadowing %s function %q#D",
1289 DECL_BUILT_IN (olddecl) ? "built-in" : "library",
1293 /* Discard the old built-in function. */
1296 /* Replace the old RTL to avoid problems with inlining. */
1297 COPY_DECL_RTL (newdecl, olddecl);
1299 /* Even if the types match, prefer the new declarations type
1300 for anticipated built-ins, for exception lists, etc... */
1301 else if (DECL_ANTICIPATED (olddecl))
1303 tree type = TREE_TYPE (newdecl);
1304 tree attribs = (*targetm.merge_type_attributes)
1305 (TREE_TYPE (olddecl), type);
1307 type = cp_build_type_attribute_variant (type, attribs);
1308 TREE_TYPE (newdecl) = TREE_TYPE (olddecl) = type;
1311 /* Whether or not the builtin can throw exceptions has no
1312 bearing on this declarator. */
1313 TREE_NOTHROW (olddecl) = 0;
1315 if (DECL_THIS_STATIC (newdecl) && !DECL_THIS_STATIC (olddecl))
1317 /* If a builtin function is redeclared as `static', merge
1318 the declarations, but make the original one static. */
1319 DECL_THIS_STATIC (olddecl) = 1;
1320 TREE_PUBLIC (olddecl) = 0;
1322 /* Make the old declaration consistent with the new one so
1323 that all remnants of the builtin-ness of this function
1324 will be banished. */
1325 SET_DECL_LANGUAGE (olddecl, DECL_LANGUAGE (newdecl));
1326 COPY_DECL_RTL (newdecl, olddecl);
1329 else if (TREE_CODE (olddecl) != TREE_CODE (newdecl))
1331 if ((TREE_CODE (olddecl) == TYPE_DECL && DECL_ARTIFICIAL (olddecl)
1332 && TREE_CODE (newdecl) != TYPE_DECL
1333 && ! (TREE_CODE (newdecl) == TEMPLATE_DECL
1334 && TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == TYPE_DECL))
1335 || (TREE_CODE (newdecl) == TYPE_DECL && DECL_ARTIFICIAL (newdecl)
1336 && TREE_CODE (olddecl) != TYPE_DECL
1337 && ! (TREE_CODE (olddecl) == TEMPLATE_DECL
1338 && (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl))
1341 /* We do nothing special here, because C++ does such nasty
1342 things with TYPE_DECLs. Instead, just let the TYPE_DECL
1343 get shadowed, and know that if we need to find a TYPE_DECL
1344 for a given name, we can look in the IDENTIFIER_TYPE_VALUE
1345 slot of the identifier. */
1349 if ((TREE_CODE (newdecl) == FUNCTION_DECL
1350 && DECL_FUNCTION_TEMPLATE_P (olddecl))
1351 || (TREE_CODE (olddecl) == FUNCTION_DECL
1352 && DECL_FUNCTION_TEMPLATE_P (newdecl)))
1355 error ("%q#D redeclared as different kind of symbol", newdecl);
1356 if (TREE_CODE (olddecl) == TREE_LIST)
1357 olddecl = TREE_VALUE (olddecl);
1358 cp_error_at ("previous declaration of %q#D", olddecl);
1360 return error_mark_node;
1362 else if (!types_match)
1364 if (CP_DECL_CONTEXT (newdecl) != CP_DECL_CONTEXT (olddecl))
1365 /* These are certainly not duplicate declarations; they're
1366 from different scopes. */
1369 if (TREE_CODE (newdecl) == TEMPLATE_DECL)
1371 /* The name of a class template may not be declared to refer to
1372 any other template, class, function, object, namespace, value,
1373 or type in the same scope. */
1374 if (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl)) == TYPE_DECL
1375 || TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == TYPE_DECL)
1377 error ("declaration of template %q#D", newdecl);
1378 cp_error_at ("conflicts with previous declaration %q#D",
1381 else if (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl)) == FUNCTION_DECL
1382 && TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == FUNCTION_DECL
1383 && compparms (TYPE_ARG_TYPES (TREE_TYPE (DECL_TEMPLATE_RESULT (olddecl))),
1384 TYPE_ARG_TYPES (TREE_TYPE (DECL_TEMPLATE_RESULT (newdecl))))
1385 && comp_template_parms (DECL_TEMPLATE_PARMS (newdecl),
1386 DECL_TEMPLATE_PARMS (olddecl))
1387 /* Template functions can be disambiguated by
1389 && same_type_p (TREE_TYPE (TREE_TYPE (newdecl)),
1390 TREE_TYPE (TREE_TYPE (olddecl))))
1392 error ("new declaration %q#D", newdecl);
1393 cp_error_at ("ambiguates old declaration %q#D", olddecl);
1397 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1399 if (DECL_EXTERN_C_P (newdecl) && DECL_EXTERN_C_P (olddecl))
1401 error ("declaration of C function %q#D conflicts with",
1403 cp_error_at ("previous declaration %q#D here", olddecl);
1405 else if (compparms (TYPE_ARG_TYPES (TREE_TYPE (newdecl)),
1406 TYPE_ARG_TYPES (TREE_TYPE (olddecl))))
1408 error ("new declaration %q#D", newdecl);
1409 cp_error_at ("ambiguates old declaration %q#D", olddecl);
1416 error ("conflicting declaration %q#D", newdecl);
1417 cp_error_at ("%qD has a previous declaration as %q#D",
1419 return error_mark_node;
1422 else if (TREE_CODE (newdecl) == FUNCTION_DECL
1423 && ((DECL_TEMPLATE_SPECIALIZATION (olddecl)
1424 && (!DECL_TEMPLATE_INFO (newdecl)
1425 || (DECL_TI_TEMPLATE (newdecl)
1426 != DECL_TI_TEMPLATE (olddecl))))
1427 || (DECL_TEMPLATE_SPECIALIZATION (newdecl)
1428 && (!DECL_TEMPLATE_INFO (olddecl)
1429 || (DECL_TI_TEMPLATE (olddecl)
1430 != DECL_TI_TEMPLATE (newdecl))))))
1431 /* It's OK to have a template specialization and a non-template
1432 with the same type, or to have specializations of two
1433 different templates with the same type. Note that if one is a
1434 specialization, and the other is an instantiation of the same
1435 template, that we do not exit at this point. That situation
1436 can occur if we instantiate a template class, and then
1437 specialize one of its methods. This situation is valid, but
1438 the declarations must be merged in the usual way. */
1440 else if (TREE_CODE (newdecl) == FUNCTION_DECL
1441 && ((DECL_TEMPLATE_INSTANTIATION (olddecl)
1442 && !DECL_USE_TEMPLATE (newdecl))
1443 || (DECL_TEMPLATE_INSTANTIATION (newdecl)
1444 && !DECL_USE_TEMPLATE (olddecl))))
1445 /* One of the declarations is a template instantiation, and the
1446 other is not a template at all. That's OK. */
1448 else if (TREE_CODE (newdecl) == NAMESPACE_DECL)
1450 /* In [namespace.alias] we have:
1452 In a declarative region, a namespace-alias-definition can be
1453 used to redefine a namespace-alias declared in that declarative
1454 region to refer only to the namespace to which it already
1457 Therefore, if we encounter a second alias directive for the same
1458 alias, we can just ignore the second directive. */
1459 if (DECL_NAMESPACE_ALIAS (newdecl)
1460 && (DECL_NAMESPACE_ALIAS (newdecl)
1461 == DECL_NAMESPACE_ALIAS (olddecl)))
1463 /* [namespace.alias]
1465 A namespace-name or namespace-alias shall not be declared as
1466 the name of any other entity in the same declarative region.
1467 A namespace-name defined at global scope shall not be
1468 declared as the name of any other entity in any global scope
1470 error ("declaration of namespace %qD conflicts with", newdecl);
1471 cp_error_at ("previous declaration of namespace %qD here", olddecl);
1472 return error_mark_node;
1476 const char *errmsg = redeclaration_error_message (newdecl, olddecl);
1479 error (errmsg, newdecl);
1480 if (DECL_NAME (olddecl) != NULL_TREE)
1481 cp_error_at ((DECL_INITIAL (olddecl)
1482 && namespace_bindings_p ())
1483 ? "%q#D previously defined here"
1484 : "%q#D previously declared here", olddecl);
1485 return error_mark_node;
1487 else if (TREE_CODE (olddecl) == FUNCTION_DECL
1488 && DECL_INITIAL (olddecl) != NULL_TREE
1489 && TYPE_ARG_TYPES (TREE_TYPE (olddecl)) == NULL_TREE
1490 && TYPE_ARG_TYPES (TREE_TYPE (newdecl)) != NULL_TREE)
1492 /* Prototype decl follows defn w/o prototype. */
1493 cp_warning_at ("prototype for %q#D", newdecl);
1494 warning ("%Jfollows non-prototype definition here", olddecl);
1496 else if (TREE_CODE (olddecl) == FUNCTION_DECL
1497 && DECL_LANGUAGE (newdecl) != DECL_LANGUAGE (olddecl))
1499 /* extern "C" int foo ();
1500 int foo () { bar (); }
1502 if (current_lang_depth () == 0)
1503 SET_DECL_LANGUAGE (newdecl, DECL_LANGUAGE (olddecl));
1506 cp_error_at ("previous declaration of %q#D with %qL linkage",
1507 olddecl, DECL_LANGUAGE (olddecl));
1508 error ("conflicts with new declaration with %qL linkage",
1509 DECL_LANGUAGE (newdecl));
1513 if (DECL_LANG_SPECIFIC (olddecl) && DECL_USE_TEMPLATE (olddecl))
1515 else if (TREE_CODE (olddecl) == FUNCTION_DECL)
1517 tree t1 = TYPE_ARG_TYPES (TREE_TYPE (olddecl));
1518 tree t2 = TYPE_ARG_TYPES (TREE_TYPE (newdecl));
1521 if (TREE_CODE (TREE_TYPE (newdecl)) == METHOD_TYPE)
1522 t1 = TREE_CHAIN (t1), t2 = TREE_CHAIN (t2);
1524 for (; t1 && t1 != void_list_node;
1525 t1 = TREE_CHAIN (t1), t2 = TREE_CHAIN (t2), i++)
1526 if (TREE_PURPOSE (t1) && TREE_PURPOSE (t2))
1528 if (1 == simple_cst_equal (TREE_PURPOSE (t1),
1531 pedwarn ("default argument given for parameter %d of %q#D",
1533 cp_pedwarn_at ("after previous specification in %q#D",
1538 error ("default argument given for parameter %d of %q#D",
1540 cp_error_at ("after previous specification in %q#D",
1545 if (DECL_DECLARED_INLINE_P (newdecl)
1546 && ! DECL_DECLARED_INLINE_P (olddecl)
1547 && TREE_ADDRESSABLE (olddecl) && warn_inline)
1549 warning ("%q#D was used before it was declared inline", newdecl);
1550 warning ("%Jprevious non-inline declaration here", olddecl);
1555 /* Do not merge an implicit typedef with an explicit one. In:
1559 typedef class A A __attribute__ ((foo));
1561 the attribute should apply only to the typedef. */
1562 if (TREE_CODE (olddecl) == TYPE_DECL
1563 && (DECL_IMPLICIT_TYPEDEF_P (olddecl)
1564 || DECL_IMPLICIT_TYPEDEF_P (newdecl)))
1567 /* If new decl is `static' and an `extern' was seen previously,
1569 warn_extern_redeclared_static (newdecl, olddecl);
1571 /* We have committed to returning 1 at this point. */
1572 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1574 /* Now that functions must hold information normally held
1575 by field decls, there is extra work to do so that
1576 declaration information does not get destroyed during
1578 if (DECL_VINDEX (olddecl))
1579 DECL_VINDEX (newdecl) = DECL_VINDEX (olddecl);
1580 if (DECL_CONTEXT (olddecl))
1581 DECL_CONTEXT (newdecl) = DECL_CONTEXT (olddecl);
1582 DECL_STATIC_CONSTRUCTOR (newdecl) |= DECL_STATIC_CONSTRUCTOR (olddecl);
1583 DECL_STATIC_DESTRUCTOR (newdecl) |= DECL_STATIC_DESTRUCTOR (olddecl);
1584 DECL_PURE_VIRTUAL_P (newdecl) |= DECL_PURE_VIRTUAL_P (olddecl);
1585 DECL_VIRTUAL_P (newdecl) |= DECL_VIRTUAL_P (olddecl);
1586 DECL_THIS_STATIC (newdecl) |= DECL_THIS_STATIC (olddecl);
1587 if (DECL_OVERLOADED_OPERATOR_P (olddecl) != ERROR_MARK)
1588 SET_OVERLOADED_OPERATOR_CODE
1589 (newdecl, DECL_OVERLOADED_OPERATOR_P (olddecl));
1590 new_defines_function = DECL_INITIAL (newdecl) != NULL_TREE;
1592 /* Optionally warn about more than one declaration for the same
1593 name, but don't warn about a function declaration followed by a
1595 if (warn_redundant_decls && ! DECL_ARTIFICIAL (olddecl)
1596 && !(new_defines_function && DECL_INITIAL (olddecl) == NULL_TREE)
1597 /* Don't warn about extern decl followed by definition. */
1598 && !(DECL_EXTERNAL (olddecl) && ! DECL_EXTERNAL (newdecl))
1599 /* Don't warn about friends, let add_friend take care of it. */
1600 && ! (DECL_FRIEND_P (newdecl) || DECL_FRIEND_P (olddecl)))
1602 warning ("redundant redeclaration of %qD in same scope", newdecl);
1603 cp_warning_at ("previous declaration of %qD", olddecl);
1607 /* Deal with C++: must preserve virtual function table size. */
1608 if (TREE_CODE (olddecl) == TYPE_DECL)
1610 tree newtype = TREE_TYPE (newdecl);
1611 tree oldtype = TREE_TYPE (olddecl);
1613 if (newtype != error_mark_node && oldtype != error_mark_node
1614 && TYPE_LANG_SPECIFIC (newtype) && TYPE_LANG_SPECIFIC (oldtype))
1615 CLASSTYPE_FRIEND_CLASSES (newtype)
1616 = CLASSTYPE_FRIEND_CLASSES (oldtype);
1618 DECL_ORIGINAL_TYPE (newdecl) = DECL_ORIGINAL_TYPE (olddecl);
1621 /* Copy all the DECL_... slots specified in the new decl
1622 except for any that we copy here from the old type. */
1623 DECL_ATTRIBUTES (newdecl)
1624 = (*targetm.merge_decl_attributes) (olddecl, newdecl);
1626 if (TREE_CODE (newdecl) == TEMPLATE_DECL)
1628 TREE_TYPE (olddecl) = TREE_TYPE (DECL_TEMPLATE_RESULT (olddecl));
1629 DECL_TEMPLATE_SPECIALIZATIONS (olddecl)
1630 = chainon (DECL_TEMPLATE_SPECIALIZATIONS (olddecl),
1631 DECL_TEMPLATE_SPECIALIZATIONS (newdecl));
1633 /* If the new declaration is a definition, update the file and
1634 line information on the declaration. */
1635 if (DECL_INITIAL (DECL_TEMPLATE_RESULT (olddecl)) == NULL_TREE
1636 && DECL_INITIAL (DECL_TEMPLATE_RESULT (newdecl)) != NULL_TREE)
1638 DECL_SOURCE_LOCATION (olddecl)
1639 = DECL_SOURCE_LOCATION (DECL_TEMPLATE_RESULT (olddecl))
1640 = DECL_SOURCE_LOCATION (newdecl);
1641 if (DECL_FUNCTION_TEMPLATE_P (newdecl))
1642 DECL_ARGUMENTS (DECL_TEMPLATE_RESULT (olddecl))
1643 = DECL_ARGUMENTS (DECL_TEMPLATE_RESULT (newdecl));
1646 if (DECL_FUNCTION_TEMPLATE_P (newdecl))
1648 DECL_INLINE (DECL_TEMPLATE_RESULT (olddecl))
1649 |= DECL_INLINE (DECL_TEMPLATE_RESULT (newdecl));
1650 DECL_DECLARED_INLINE_P (DECL_TEMPLATE_RESULT (olddecl))
1651 |= DECL_DECLARED_INLINE_P (DECL_TEMPLATE_RESULT (newdecl));
1659 /* Automatically handles default parameters. */
1660 tree oldtype = TREE_TYPE (olddecl);
1663 /* Merge the data types specified in the two decls. */
1664 newtype = merge_types (TREE_TYPE (newdecl), TREE_TYPE (olddecl));
1666 /* If merge_types produces a non-typedef type, just use the old type. */
1667 if (TREE_CODE (newdecl) == TYPE_DECL
1668 && newtype == DECL_ORIGINAL_TYPE (newdecl))
1671 if (TREE_CODE (newdecl) == VAR_DECL)
1673 DECL_THIS_EXTERN (newdecl) |= DECL_THIS_EXTERN (olddecl);
1674 DECL_INITIALIZED_P (newdecl) |= DECL_INITIALIZED_P (olddecl);
1675 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (newdecl)
1676 |= DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (olddecl);
1679 /* Do this after calling `merge_types' so that default
1680 parameters don't confuse us. */
1681 else if (TREE_CODE (newdecl) == FUNCTION_DECL
1682 && (TYPE_RAISES_EXCEPTIONS (TREE_TYPE (newdecl))
1683 != TYPE_RAISES_EXCEPTIONS (TREE_TYPE (olddecl))))
1685 TREE_TYPE (newdecl) = build_exception_variant (newtype,
1686 TYPE_RAISES_EXCEPTIONS (TREE_TYPE (newdecl)));
1687 TREE_TYPE (olddecl) = build_exception_variant (newtype,
1688 TYPE_RAISES_EXCEPTIONS (oldtype));
1690 if ((pedantic || ! DECL_IN_SYSTEM_HEADER (olddecl))
1691 && ! DECL_IS_BUILTIN (olddecl)
1693 && !comp_except_specs (TYPE_RAISES_EXCEPTIONS (TREE_TYPE (newdecl)),
1694 TYPE_RAISES_EXCEPTIONS (TREE_TYPE (olddecl)), 1))
1696 error ("declaration of %qF throws different exceptions",
1698 cp_error_at ("than previous declaration %qF", olddecl);
1701 TREE_TYPE (newdecl) = TREE_TYPE (olddecl) = newtype;
1703 /* Lay the type out, unless already done. */
1704 if (! same_type_p (newtype, oldtype)
1705 && TREE_TYPE (newdecl) != error_mark_node
1706 && !(processing_template_decl && uses_template_parms (newdecl)))
1707 layout_type (TREE_TYPE (newdecl));
1709 if ((TREE_CODE (newdecl) == VAR_DECL
1710 || TREE_CODE (newdecl) == PARM_DECL
1711 || TREE_CODE (newdecl) == RESULT_DECL
1712 || TREE_CODE (newdecl) == FIELD_DECL
1713 || TREE_CODE (newdecl) == TYPE_DECL)
1714 && !(processing_template_decl && uses_template_parms (newdecl)))
1715 layout_decl (newdecl, 0);
1717 /* Merge the type qualifiers. */
1718 if (TREE_READONLY (newdecl))
1719 TREE_READONLY (olddecl) = 1;
1720 if (TREE_THIS_VOLATILE (newdecl))
1721 TREE_THIS_VOLATILE (olddecl) = 1;
1722 if (TREE_NOTHROW (newdecl))
1723 TREE_NOTHROW (olddecl) = 1;
1725 /* Merge deprecatedness. */
1726 if (TREE_DEPRECATED (newdecl))
1727 TREE_DEPRECATED (olddecl) = 1;
1729 /* Merge the initialization information. */
1730 if (DECL_INITIAL (newdecl) == NULL_TREE
1731 && DECL_INITIAL (olddecl) != NULL_TREE)
1733 DECL_INITIAL (newdecl) = DECL_INITIAL (olddecl);
1734 DECL_SOURCE_LOCATION (newdecl) = DECL_SOURCE_LOCATION (olddecl);
1735 if (CAN_HAVE_FULL_LANG_DECL_P (newdecl)
1736 && DECL_LANG_SPECIFIC (newdecl)
1737 && DECL_LANG_SPECIFIC (olddecl))
1739 DECL_SAVED_TREE (newdecl) = DECL_SAVED_TREE (olddecl);
1740 DECL_STRUCT_FUNCTION (newdecl) = DECL_STRUCT_FUNCTION (olddecl);
1744 /* Merge the section attribute.
1745 We want to issue an error if the sections conflict but that must be
1746 done later in decl_attributes since we are called before attributes
1748 if (DECL_SECTION_NAME (newdecl) == NULL_TREE)
1749 DECL_SECTION_NAME (newdecl) = DECL_SECTION_NAME (olddecl);
1751 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1753 DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (newdecl)
1754 |= DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (olddecl);
1755 DECL_NO_LIMIT_STACK (newdecl) |= DECL_NO_LIMIT_STACK (olddecl);
1756 TREE_THIS_VOLATILE (newdecl) |= TREE_THIS_VOLATILE (olddecl);
1757 TREE_READONLY (newdecl) |= TREE_READONLY (olddecl);
1758 TREE_NOTHROW (newdecl) |= TREE_NOTHROW (olddecl);
1759 DECL_IS_MALLOC (newdecl) |= DECL_IS_MALLOC (olddecl);
1760 DECL_IS_PURE (newdecl) |= DECL_IS_PURE (olddecl);
1761 /* Keep the old RTL. */
1762 COPY_DECL_RTL (olddecl, newdecl);
1764 else if (TREE_CODE (newdecl) == VAR_DECL
1765 && (DECL_SIZE (olddecl) || !DECL_SIZE (newdecl)))
1767 /* Keep the old RTL. We cannot keep the old RTL if the old
1768 declaration was for an incomplete object and the new
1769 declaration is not since many attributes of the RTL will
1771 COPY_DECL_RTL (olddecl, newdecl);
1774 /* If cannot merge, then use the new type and qualifiers,
1775 and don't preserve the old rtl. */
1778 /* Clean out any memory we had of the old declaration. */
1779 tree oldstatic = value_member (olddecl, static_aggregates);
1781 TREE_VALUE (oldstatic) = error_mark_node;
1783 TREE_TYPE (olddecl) = TREE_TYPE (newdecl);
1784 TREE_READONLY (olddecl) = TREE_READONLY (newdecl);
1785 TREE_THIS_VOLATILE (olddecl) = TREE_THIS_VOLATILE (newdecl);
1786 TREE_SIDE_EFFECTS (olddecl) = TREE_SIDE_EFFECTS (newdecl);
1789 /* Merge the storage class information. */
1790 merge_weak (newdecl, olddecl);
1792 DECL_ONE_ONLY (newdecl) |= DECL_ONE_ONLY (olddecl);
1793 DECL_DEFER_OUTPUT (newdecl) |= DECL_DEFER_OUTPUT (olddecl);
1794 TREE_PUBLIC (newdecl) = TREE_PUBLIC (olddecl);
1795 TREE_STATIC (olddecl) = TREE_STATIC (newdecl) |= TREE_STATIC (olddecl);
1796 if (! DECL_EXTERNAL (olddecl))
1797 DECL_EXTERNAL (newdecl) = 0;
1799 if (DECL_LANG_SPECIFIC (newdecl) && DECL_LANG_SPECIFIC (olddecl))
1801 DECL_INTERFACE_KNOWN (newdecl) |= DECL_INTERFACE_KNOWN (olddecl);
1802 DECL_NOT_REALLY_EXTERN (newdecl) |= DECL_NOT_REALLY_EXTERN (olddecl);
1803 DECL_COMDAT (newdecl) |= DECL_COMDAT (olddecl);
1804 DECL_TEMPLATE_INSTANTIATED (newdecl)
1805 |= DECL_TEMPLATE_INSTANTIATED (olddecl);
1806 /* Don't really know how much of the language-specific
1807 values we should copy from old to new. */
1808 DECL_IN_AGGR_P (newdecl) = DECL_IN_AGGR_P (olddecl);
1809 DECL_LANG_SPECIFIC (newdecl)->decl_flags.u2 =
1810 DECL_LANG_SPECIFIC (olddecl)->decl_flags.u2;
1811 DECL_NONCONVERTING_P (newdecl) = DECL_NONCONVERTING_P (olddecl);
1812 DECL_REPO_AVAILABLE_P (newdecl) = DECL_REPO_AVAILABLE_P (olddecl);
1813 DECL_TEMPLATE_INFO (newdecl) = DECL_TEMPLATE_INFO (olddecl);
1814 DECL_INITIALIZED_IN_CLASS_P (newdecl)
1815 |= DECL_INITIALIZED_IN_CLASS_P (olddecl);
1816 olddecl_friend = DECL_FRIEND_P (olddecl);
1818 /* Only functions have DECL_BEFRIENDING_CLASSES. */
1819 if (TREE_CODE (newdecl) == FUNCTION_DECL
1820 || DECL_FUNCTION_TEMPLATE_P (newdecl))
1822 DECL_BEFRIENDING_CLASSES (newdecl)
1823 = chainon (DECL_BEFRIENDING_CLASSES (newdecl),
1824 DECL_BEFRIENDING_CLASSES (olddecl));
1825 /* DECL_THUNKS is only valid for virtual functions,
1826 otherwise it is a DECL_FRIEND_CONTEXT. */
1827 if (DECL_VIRTUAL_P (newdecl))
1828 DECL_THUNKS (newdecl) = DECL_THUNKS (olddecl);
1832 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1834 if (DECL_TEMPLATE_INSTANTIATION (olddecl)
1835 && !DECL_TEMPLATE_INSTANTIATION (newdecl))
1837 /* If newdecl is not a specialization, then it is not a
1838 template-related function at all. And that means that we
1839 should have exited above, returning 0. */
1840 gcc_assert (DECL_TEMPLATE_SPECIALIZATION (newdecl));
1842 if (TREE_USED (olddecl))
1843 /* From [temp.expl.spec]:
1845 If a template, a member template or the member of a class
1846 template is explicitly specialized then that
1847 specialization shall be declared before the first use of
1848 that specialization that would cause an implicit
1849 instantiation to take place, in every translation unit in
1850 which such a use occurs. */
1851 error ("explicit specialization of %qD after first use",
1854 SET_DECL_TEMPLATE_SPECIALIZATION (olddecl);
1856 /* [temp.expl.spec/14] We don't inline explicit specialization
1857 just because the primary template says so. */
1861 if (DECL_PENDING_INLINE_INFO (newdecl) == 0)
1862 DECL_PENDING_INLINE_INFO (newdecl) = DECL_PENDING_INLINE_INFO (olddecl);
1864 DECL_DECLARED_INLINE_P (newdecl) |= DECL_DECLARED_INLINE_P (olddecl);
1866 /* If either decl says `inline', this fn is inline, unless
1867 its definition was passed already. */
1868 if (DECL_INLINE (newdecl) && DECL_INITIAL (olddecl) == NULL_TREE)
1869 DECL_INLINE (olddecl) = 1;
1870 DECL_INLINE (newdecl) = DECL_INLINE (olddecl);
1872 DECL_UNINLINABLE (newdecl) = DECL_UNINLINABLE (olddecl)
1873 = (DECL_UNINLINABLE (newdecl) || DECL_UNINLINABLE (olddecl));
1876 /* Preserve abstractness on cloned [cd]tors. */
1877 DECL_ABSTRACT (newdecl) = DECL_ABSTRACT (olddecl);
1881 SET_DECL_LANGUAGE (olddecl, DECL_LANGUAGE (newdecl));
1882 COPY_DECL_ASSEMBLER_NAME (newdecl, olddecl);
1883 COPY_DECL_RTL (newdecl, olddecl);
1885 if (! types_match || new_defines_function)
1887 /* These need to be copied so that the names are available.
1888 Note that if the types do match, we'll preserve inline
1889 info and other bits, but if not, we won't. */
1890 DECL_ARGUMENTS (olddecl) = DECL_ARGUMENTS (newdecl);
1891 DECL_RESULT (olddecl) = DECL_RESULT (newdecl);
1893 if (new_defines_function)
1894 /* If defining a function declared with other language
1895 linkage, use the previously declared language linkage. */
1896 SET_DECL_LANGUAGE (newdecl, DECL_LANGUAGE (olddecl));
1897 else if (types_match)
1899 /* If redeclaring a builtin function, and not a definition,
1900 it stays built in. */
1901 if (DECL_BUILT_IN (olddecl))
1903 DECL_BUILT_IN_CLASS (newdecl) = DECL_BUILT_IN_CLASS (olddecl);
1904 DECL_FUNCTION_CODE (newdecl) = DECL_FUNCTION_CODE (olddecl);
1905 /* If we're keeping the built-in definition, keep the rtl,
1906 regardless of declaration matches. */
1907 COPY_DECL_RTL (olddecl, newdecl);
1910 DECL_RESULT (newdecl) = DECL_RESULT (olddecl);
1911 /* Don't clear out the arguments if we're redefining a function. */
1912 if (DECL_ARGUMENTS (olddecl))
1913 DECL_ARGUMENTS (newdecl) = DECL_ARGUMENTS (olddecl);
1916 else if (TREE_CODE (newdecl) == NAMESPACE_DECL)
1917 NAMESPACE_LEVEL (newdecl) = NAMESPACE_LEVEL (olddecl);
1919 /* Now preserve various other info from the definition. */
1920 TREE_ADDRESSABLE (newdecl) = TREE_ADDRESSABLE (olddecl);
1921 TREE_ASM_WRITTEN (newdecl) = TREE_ASM_WRITTEN (olddecl);
1922 DECL_COMMON (newdecl) = DECL_COMMON (olddecl);
1923 COPY_DECL_ASSEMBLER_NAME (olddecl, newdecl);
1925 /* Warn about conflicting visibility specifications. */
1926 if (DECL_VISIBILITY_SPECIFIED (olddecl)
1927 && DECL_VISIBILITY_SPECIFIED (newdecl)
1928 && DECL_VISIBILITY (newdecl) != DECL_VISIBILITY (olddecl))
1930 warning ("%J%qD: visibility attribute ignored because it",
1932 warning ("%Jconflicts with previous declaration here", olddecl);
1934 /* Choose the declaration which specified visibility. */
1935 if (DECL_VISIBILITY_SPECIFIED (olddecl))
1937 DECL_VISIBILITY (newdecl) = DECL_VISIBILITY (olddecl);
1938 DECL_VISIBILITY_SPECIFIED (newdecl) = 1;
1941 /* The DECL_LANG_SPECIFIC information in OLDDECL will be replaced
1942 with that from NEWDECL below. */
1943 if (DECL_LANG_SPECIFIC (olddecl))
1945 gcc_assert (DECL_LANG_SPECIFIC (olddecl)
1946 != DECL_LANG_SPECIFIC (newdecl));
1947 ggc_free (DECL_LANG_SPECIFIC (olddecl));
1950 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1954 function_size = sizeof (struct tree_decl);
1956 memcpy ((char *) olddecl + sizeof (struct tree_common),
1957 (char *) newdecl + sizeof (struct tree_common),
1958 function_size - sizeof (struct tree_common));
1960 if (DECL_TEMPLATE_INSTANTIATION (newdecl))
1961 /* If newdecl is a template instantiation, it is possible that
1962 the following sequence of events has occurred:
1964 o A friend function was declared in a class template. The
1965 class template was instantiated.
1967 o The instantiation of the friend declaration was
1968 recorded on the instantiation list, and is newdecl.
1970 o Later, however, instantiate_class_template called pushdecl
1971 on the newdecl to perform name injection. But, pushdecl in
1972 turn called duplicate_decls when it discovered that another
1973 declaration of a global function with the same name already
1976 o Here, in duplicate_decls, we decided to clobber newdecl.
1978 If we're going to do that, we'd better make sure that
1979 olddecl, and not newdecl, is on the list of
1980 instantiations so that if we try to do the instantiation
1981 again we won't get the clobbered declaration. */
1982 reregister_specialization (newdecl,
1983 DECL_TI_TEMPLATE (newdecl),
1988 memcpy ((char *) olddecl + sizeof (struct tree_common),
1989 (char *) newdecl + sizeof (struct tree_common),
1990 sizeof (struct tree_decl) - sizeof (struct tree_common)
1991 + TREE_CODE_LENGTH (TREE_CODE (newdecl)) * sizeof (char *));
1994 DECL_UID (olddecl) = olddecl_uid;
1996 DECL_FRIEND_P (olddecl) = 1;
1998 /* NEWDECL contains the merged attribute lists.
1999 Update OLDDECL to be the same. */
2000 DECL_ATTRIBUTES (olddecl) = DECL_ATTRIBUTES (newdecl);
2002 /* If OLDDECL had its DECL_RTL instantiated, re-invoke make_decl_rtl
2003 so that encode_section_info has a chance to look at the new decl
2004 flags and attributes. */
2005 if (DECL_RTL_SET_P (olddecl)
2006 && (TREE_CODE (olddecl) == FUNCTION_DECL
2007 || (TREE_CODE (olddecl) == VAR_DECL
2008 && TREE_STATIC (olddecl))))
2009 make_decl_rtl (olddecl);
2011 /* The NEWDECL will no longer be needed. Because every out-of-class
2012 declaration of a member results in a call to duplicate_decls,
2013 freeing these nodes represents in a significant savings. */
2019 /* Return zero if the declaration NEWDECL is valid
2020 when the declaration OLDDECL (assumed to be for the same name)
2021 has already been seen.
2022 Otherwise return an error message format string with a %s
2023 where the identifier should go. */
2026 redeclaration_error_message (tree newdecl, tree olddecl)
2028 if (TREE_CODE (newdecl) == TYPE_DECL)
2030 /* Because C++ can put things into name space for free,
2031 constructs like "typedef struct foo { ... } foo"
2032 would look like an erroneous redeclaration. */
2033 if (same_type_p (TREE_TYPE (newdecl), TREE_TYPE (olddecl)))
2036 return "redefinition of %q#D";
2038 else if (TREE_CODE (newdecl) == FUNCTION_DECL)
2040 /* If this is a pure function, its olddecl will actually be
2041 the original initialization to `0' (which we force to call
2042 abort()). Don't complain about redefinition in this case. */
2043 if (DECL_LANG_SPECIFIC (olddecl) && DECL_PURE_VIRTUAL_P (olddecl))
2046 /* If both functions come from different namespaces, this is not
2047 a redeclaration - this is a conflict with a used function. */
2048 if (DECL_NAMESPACE_SCOPE_P (olddecl)
2049 && DECL_CONTEXT (olddecl) != DECL_CONTEXT (newdecl))
2050 return "%qD conflicts with used function";
2052 /* We'll complain about linkage mismatches in
2053 warn_extern_redeclared_static. */
2055 /* Defining the same name twice is no good. */
2056 if (DECL_INITIAL (olddecl) != NULL_TREE
2057 && DECL_INITIAL (newdecl) != NULL_TREE)
2059 if (DECL_NAME (olddecl) == NULL_TREE)
2060 return "%q#D not declared in class";
2062 return "redefinition of %q#D";
2066 else if (TREE_CODE (newdecl) == TEMPLATE_DECL)
2070 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == TYPE_DECL)
2072 if (COMPLETE_TYPE_P (TREE_TYPE (newdecl))
2073 && COMPLETE_TYPE_P (TREE_TYPE (olddecl)))
2074 return "redefinition of %q#D";
2078 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) != FUNCTION_DECL
2079 || (DECL_TEMPLATE_RESULT (newdecl)
2080 == DECL_TEMPLATE_RESULT (olddecl)))
2083 nt = DECL_TEMPLATE_RESULT (newdecl);
2084 if (DECL_TEMPLATE_INFO (nt))
2085 nt = DECL_TEMPLATE_RESULT (template_for_substitution (nt));
2086 ot = DECL_TEMPLATE_RESULT (olddecl);
2087 if (DECL_TEMPLATE_INFO (ot))
2088 ot = DECL_TEMPLATE_RESULT (template_for_substitution (ot));
2089 if (DECL_INITIAL (nt) && DECL_INITIAL (ot))
2090 return "redefinition of %q#D";
2094 else if (toplevel_bindings_p () || DECL_NAMESPACE_SCOPE_P (newdecl))
2096 /* Objects declared at top level: */
2097 /* If at least one is a reference, it's ok. */
2098 if (DECL_EXTERNAL (newdecl) || DECL_EXTERNAL (olddecl))
2100 /* Reject two definitions. */
2101 return "redefinition of %q#D";
2105 /* Objects declared with block scope: */
2106 /* Reject two definitions, and reject a definition
2107 together with an external reference. */
2108 if (!(DECL_EXTERNAL (newdecl) && DECL_EXTERNAL (olddecl)))
2109 return "redeclaration of %q#D";
2114 /* Create a new label, named ID. */
2117 make_label_decl (tree id, int local_p)
2121 decl = build_decl (LABEL_DECL, id, void_type_node);
2123 DECL_CONTEXT (decl) = current_function_decl;
2124 DECL_MODE (decl) = VOIDmode;
2125 C_DECLARED_LABEL_FLAG (decl) = local_p;
2127 /* Say where one reference is to the label, for the sake of the
2128 error if it is not defined. */
2129 DECL_SOURCE_LOCATION (decl) = input_location;
2131 /* Record the fact that this identifier is bound to this label. */
2132 SET_IDENTIFIER_LABEL_VALUE (id, decl);
2137 /* Record this label on the list of used labels so that we can check
2138 at the end of the function to see whether or not the label was
2139 actually defined, and so we can check when the label is defined whether
2140 this use is valid. */
2143 use_label (tree decl)
2145 if (named_label_uses == NULL
2146 || named_label_uses->names_in_scope != current_binding_level->names
2147 || named_label_uses->label_decl != decl)
2149 struct named_label_use_list *new_ent;
2150 new_ent = GGC_NEW (struct named_label_use_list);
2151 new_ent->label_decl = decl;
2152 new_ent->names_in_scope = current_binding_level->names;
2153 new_ent->binding_level = current_binding_level;
2154 new_ent->o_goto_locus = input_location;
2155 new_ent->next = named_label_uses;
2156 named_label_uses = new_ent;
2160 /* Look for a label named ID in the current function. If one cannot
2161 be found, create one. (We keep track of used, but undefined,
2162 labels, and complain about them at the end of a function.) */
2165 lookup_label (tree id)
2168 struct named_label_list *ent;
2170 timevar_push (TV_NAME_LOOKUP);
2171 /* You can't use labels at global scope. */
2172 if (current_function_decl == NULL_TREE)
2174 error ("label %qE referenced outside of any function", id);
2175 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, NULL_TREE);
2178 /* See if we've already got this label. */
2179 decl = IDENTIFIER_LABEL_VALUE (id);
2180 if (decl != NULL_TREE && DECL_CONTEXT (decl) == current_function_decl)
2181 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, decl);
2183 /* Record this label on the list of labels used in this function.
2184 We do this before calling make_label_decl so that we get the
2185 IDENTIFIER_LABEL_VALUE before the new label is declared. */
2186 ent = GGC_CNEW (struct named_label_list);
2187 ent->old_value = IDENTIFIER_LABEL_VALUE (id);
2188 ent->next = named_labels;
2191 /* We need a new label. */
2192 decl = make_label_decl (id, /*local_p=*/0);
2194 /* Now fill in the information we didn't have before. */
2195 ent->label_decl = decl;
2197 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, decl);
2200 /* Declare a local label named ID. */
2203 declare_local_label (tree id)
2207 /* Add a new entry to the SHADOWED_LABELS list so that when we leave
2208 this scope we can restore the old value of
2209 IDENTIFIER_TYPE_VALUE. */
2210 current_binding_level->shadowed_labels
2211 = tree_cons (IDENTIFIER_LABEL_VALUE (id), NULL_TREE,
2212 current_binding_level->shadowed_labels);
2213 /* Look for the label. */
2214 decl = make_label_decl (id, /*local_p=*/1);
2215 /* Now fill in the information we didn't have before. */
2216 TREE_VALUE (current_binding_level->shadowed_labels) = decl;
2221 /* Returns nonzero if it is ill-formed to jump past the declaration of
2222 DECL. Returns 2 if it's also a real problem. */
2225 decl_jump_unsafe (tree decl)
2227 if (TREE_CODE (decl) != VAR_DECL || TREE_STATIC (decl))
2230 if (DECL_INITIAL (decl) == NULL_TREE
2231 && pod_type_p (TREE_TYPE (decl)))
2234 /* This is really only important if we're crossing an initialization.
2235 The POD stuff is just pedantry; why should it matter if the class
2236 contains a field of pointer to member type? */
2237 if (DECL_INITIAL (decl)
2238 || (TYPE_NEEDS_CONSTRUCTING (TREE_TYPE (decl))))
2243 /* Check that a single previously seen jump to a newly defined label
2244 is OK. DECL is the LABEL_DECL or 0; LEVEL is the binding_level for
2245 the jump context; NAMES are the names in scope in LEVEL at the jump
2246 context; FILE and LINE are the source position of the jump or 0. */
2249 check_previous_goto_1 (tree decl,
2250 struct cp_binding_level* level,
2251 tree names, const location_t *locus)
2255 struct cp_binding_level *b = current_binding_level;
2256 for (; b; b = b->level_chain)
2258 tree new_decls = b->names;
2259 tree old_decls = (b == level ? names : NULL_TREE);
2260 for (; new_decls != old_decls;
2261 new_decls = TREE_CHAIN (new_decls))
2263 int problem = decl_jump_unsafe (new_decls);
2270 pedwarn ("jump to label %qD", decl);
2272 pedwarn ("jump to case label");
2275 pedwarn ("%H from here", locus);
2280 cp_error_at (" crosses initialization of %q#D",
2283 cp_pedwarn_at (" enters scope of non-POD %q#D",
2289 if ((b->kind == sk_try || b->kind == sk_catch) && ! saw_eh)
2294 pedwarn ("jump to label %qD", decl);
2296 pedwarn ("jump to case label");
2299 pedwarn ("%H from here", locus);
2302 if (b->kind == sk_try)
2303 error (" enters try block");
2305 error (" enters catch block");
2312 check_previous_goto (struct named_label_use_list* use)
2314 check_previous_goto_1 (use->label_decl, use->binding_level,
2315 use->names_in_scope, &use->o_goto_locus);
2319 check_switch_goto (struct cp_binding_level* level)
2321 check_previous_goto_1 (NULL_TREE, level, level->names, NULL);
2324 /* Check that any previously seen jumps to a newly defined label DECL
2325 are OK. Called by define_label. */
2328 check_previous_gotos (tree decl)
2330 struct named_label_use_list **usep;
2332 if (! TREE_USED (decl))
2335 for (usep = &named_label_uses; *usep; )
2337 struct named_label_use_list *use = *usep;
2338 if (use->label_decl == decl)
2340 check_previous_goto (use);
2344 usep = &(use->next);
2348 /* Check that a new jump to a label DECL is OK. Called by
2349 finish_goto_stmt. */
2352 check_goto (tree decl)
2356 struct named_label_list *lab;
2358 /* We can't know where a computed goto is jumping. So we assume
2360 if (! DECL_P (decl))
2363 /* If the label hasn't been defined yet, defer checking. */
2364 if (! DECL_INITIAL (decl))
2370 for (lab = named_labels; lab; lab = lab->next)
2371 if (decl == lab->label_decl)
2374 /* If the label is not on named_labels it's a gcc local label, so
2375 it must be in an outer scope, so jumping to it is always OK. */
2379 if ((lab->in_try_scope || lab->in_catch_scope || lab->bad_decls)
2382 cp_pedwarn_at ("jump to label %qD", decl);
2383 pedwarn (" from here");
2387 for (bad = lab->bad_decls; bad; bad = TREE_CHAIN (bad))
2389 tree b = TREE_VALUE (bad);
2390 int u = decl_jump_unsafe (b);
2392 if (u > 1 && DECL_ARTIFICIAL (b))
2393 /* Can't skip init of __exception_info. */
2394 error ("%J enters catch block", b);
2396 cp_error_at (" skips initialization of %q#D", b);
2398 cp_pedwarn_at (" enters scope of non-POD %q#D", b);
2401 if (lab->in_try_scope)
2402 error (" enters try block");
2403 else if (lab->in_catch_scope)
2404 error (" enters catch block");
2407 /* Define a label, specifying the location in the source file.
2408 Return the LABEL_DECL node for the label. */
2411 define_label (location_t location, tree name)
2413 tree decl = lookup_label (name);
2414 struct named_label_list *ent;
2415 struct cp_binding_level *p;
2417 timevar_push (TV_NAME_LOOKUP);
2418 for (ent = named_labels; ent; ent = ent->next)
2419 if (ent->label_decl == decl)
2422 /* After labels, make any new cleanups in the function go into their
2423 own new (temporary) binding contour. */
2424 for (p = current_binding_level;
2425 p->kind != sk_function_parms;
2427 p->more_cleanups_ok = 0;
2429 if (name == get_identifier ("wchar_t"))
2430 pedwarn ("label named wchar_t");
2432 if (DECL_INITIAL (decl) != NULL_TREE)
2433 error ("duplicate label %qD", decl);
2436 /* Mark label as having been defined. */
2437 DECL_INITIAL (decl) = error_mark_node;
2438 /* Say where in the source. */
2439 DECL_SOURCE_LOCATION (decl) = location;
2442 ent->names_in_scope = current_binding_level->names;
2443 ent->binding_level = current_binding_level;
2445 check_previous_gotos (decl);
2448 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, decl);
2453 struct cp_binding_level *level;
2454 struct cp_switch *next;
2455 /* The SWITCH_STMT being built. */
2457 /* A splay-tree mapping the low element of a case range to the high
2458 element, or NULL_TREE if there is no high element. Used to
2459 determine whether or not a new case label duplicates an old case
2460 label. We need a tree, rather than simply a hash table, because
2461 of the GNU case range extension. */
2465 /* A stack of the currently active switch statements. The innermost
2466 switch statement is on the top of the stack. There is no need to
2467 mark the stack for garbage collection because it is only active
2468 during the processing of the body of a function, and we never
2469 collect at that point. */
2471 static struct cp_switch *switch_stack;
2473 /* Called right after a switch-statement condition is parsed.
2474 SWITCH_STMT is the switch statement being parsed. */
2477 push_switch (tree switch_stmt)
2479 struct cp_switch *p = xmalloc (sizeof (struct cp_switch));
2480 p->level = current_binding_level;
2481 p->next = switch_stack;
2482 p->switch_stmt = switch_stmt;
2483 p->cases = splay_tree_new (case_compare, NULL, NULL);
2490 struct cp_switch *cs = switch_stack;
2492 /* Emit warnings as needed. */
2493 c_do_switch_warnings (cs->cases, cs->switch_stmt);
2495 splay_tree_delete (cs->cases);
2496 switch_stack = switch_stack->next;
2500 /* Note that we've seen a definition of a case label, and complain if this
2501 is a bad place for one. */
2504 finish_case_label (tree low_value, tree high_value)
2507 struct cp_binding_level *p;
2509 if (processing_template_decl)
2513 /* For templates, just add the case label; we'll do semantic
2514 analysis at instantiation-time. */
2515 label = build_decl (LABEL_DECL, NULL_TREE, NULL_TREE);
2516 return add_stmt (build_case_label (low_value, high_value, label));
2519 /* Find the condition on which this switch statement depends. */
2520 cond = SWITCH_COND (switch_stack->switch_stmt);
2521 if (cond && TREE_CODE (cond) == TREE_LIST)
2522 cond = TREE_VALUE (cond);
2524 r = c_add_case_label (switch_stack->cases, cond, TREE_TYPE (cond),
2525 low_value, high_value);
2527 check_switch_goto (switch_stack->level);
2529 /* After labels, make any new cleanups in the function go into their
2530 own new (temporary) binding contour. */
2531 for (p = current_binding_level;
2532 p->kind != sk_function_parms;
2534 p->more_cleanups_ok = 0;
2539 /* Hash a TYPENAME_TYPE. K is really of type `tree'. */
2542 typename_hash (const void* k)
2547 hash = (htab_hash_pointer (TYPE_CONTEXT (t))
2548 ^ htab_hash_pointer (DECL_NAME (TYPE_NAME (t))));
2553 typedef struct typename_info {
2561 /* Compare two TYPENAME_TYPEs. K1 and K2 are really of type `tree'. */
2564 typename_compare (const void * k1, const void * k2)
2567 const typename_info *t2;
2570 t2 = (const typename_info *) k2;
2572 return (DECL_NAME (TYPE_NAME (t1)) == t2->name
2573 && TYPE_CONTEXT (t1) == t2->scope
2574 && TYPENAME_TYPE_FULLNAME (t1) == t2->template_id
2575 && TYPENAME_IS_ENUM_P (t1) == t2->enum_p
2576 && TYPENAME_IS_CLASS_P (t1) == t2->class_p);
2579 /* Build a TYPENAME_TYPE. If the type is `typename T::t', CONTEXT is
2580 the type of `T', NAME is the IDENTIFIER_NODE for `t'.
2582 Returns the new TYPENAME_TYPE. */
2584 static GTY ((param_is (union tree_node))) htab_t typename_htab;
2587 build_typename_type (tree context, tree name, tree fullname,
2588 enum tag_types tag_type)
2596 if (typename_htab == NULL)
2597 typename_htab = htab_create_ggc (61, &typename_hash,
2598 &typename_compare, NULL);
2600 ti.scope = FROB_CONTEXT (context);
2602 ti.template_id = fullname;
2603 ti.enum_p = tag_type == enum_type;
2604 ti.class_p = (tag_type == class_type
2605 || tag_type == record_type
2606 || tag_type == union_type);
2607 hash = (htab_hash_pointer (ti.scope)
2608 ^ htab_hash_pointer (ti.name));
2610 /* See if we already have this type. */
2611 e = htab_find_slot_with_hash (typename_htab, &ti, hash, INSERT);
2616 /* Build the TYPENAME_TYPE. */
2617 t = make_aggr_type (TYPENAME_TYPE);
2618 TYPE_CONTEXT (t) = ti.scope;
2619 TYPENAME_TYPE_FULLNAME (t) = ti.template_id;
2620 TYPENAME_IS_ENUM_P (t) = ti.enum_p;
2621 TYPENAME_IS_CLASS_P (t) = ti.class_p;
2623 /* Build the corresponding TYPE_DECL. */
2624 d = build_decl (TYPE_DECL, name, t);
2625 TYPE_NAME (TREE_TYPE (d)) = d;
2626 TYPE_STUB_DECL (TREE_TYPE (d)) = d;
2627 DECL_CONTEXT (d) = FROB_CONTEXT (context);
2628 DECL_ARTIFICIAL (d) = 1;
2630 /* Store it in the hash table. */
2637 /* Resolve `typename CONTEXT::NAME'. TAG_TYPE indicates the tag
2638 provided to name the type. Returns an appropriate type, unless an
2639 error occurs, in which case error_mark_node is returned. If we
2640 locate a non-artificial TYPE_DECL and TF_KEEP_TYPE_DECL is set, we
2641 return that, rather than the _TYPE it corresponds to, in other
2642 cases we look through the type decl. If TF_ERROR is set, complain
2643 about errors, otherwise be quiet. */
2646 make_typename_type (tree context, tree name, enum tag_types tag_type,
2647 tsubst_flags_t complain)
2651 if (name == error_mark_node
2652 || context == NULL_TREE
2653 || context == error_mark_node)
2654 return error_mark_node;
2658 if (!(TYPE_LANG_SPECIFIC (name)
2659 && (CLASSTYPE_IS_TEMPLATE (name)
2660 || CLASSTYPE_USE_TEMPLATE (name))))
2661 name = TYPE_IDENTIFIER (name);
2663 /* Create a TEMPLATE_ID_EXPR for the type. */
2664 name = build_nt (TEMPLATE_ID_EXPR,
2665 CLASSTYPE_TI_TEMPLATE (name),
2666 CLASSTYPE_TI_ARGS (name));
2668 else if (TREE_CODE (name) == TYPE_DECL)
2669 name = DECL_NAME (name);
2673 if (TREE_CODE (name) == TEMPLATE_ID_EXPR)
2675 name = TREE_OPERAND (name, 0);
2676 if (TREE_CODE (name) == TEMPLATE_DECL)
2677 name = TREE_OPERAND (fullname, 0) = DECL_NAME (name);
2679 if (TREE_CODE (name) == TEMPLATE_DECL)
2681 error ("%qD used without template parameters", name);
2682 return error_mark_node;
2684 gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE);
2685 gcc_assert (TYPE_P (context));
2687 if (!dependent_type_p (context)
2688 || currently_open_class (context))
2690 if (TREE_CODE (fullname) == TEMPLATE_ID_EXPR)
2692 tree tmpl = NULL_TREE;
2693 if (IS_AGGR_TYPE (context))
2694 tmpl = lookup_field (context, name, 0, false);
2695 if (!tmpl || !DECL_CLASS_TEMPLATE_P (tmpl))
2697 if (complain & tf_error)
2698 error ("no class template named %q#T in %q#T",
2700 return error_mark_node;
2703 if (complain & tf_error)
2704 perform_or_defer_access_check (TYPE_BINFO (context), tmpl);
2706 return lookup_template_class (tmpl,
2707 TREE_OPERAND (fullname, 1),
2709 /*entering_scope=*/0,
2710 tf_error | tf_warning | tf_user);
2716 if (!IS_AGGR_TYPE (context))
2718 if (complain & tf_error)
2719 error ("no type named %q#T in %q#T", name, context);
2720 return error_mark_node;
2723 t = lookup_field (context, name, 0, true);
2726 if (TREE_CODE (t) != TYPE_DECL)
2728 if (complain & tf_error)
2729 error ("no type named %q#T in %q#T", name, context);
2730 return error_mark_node;
2733 if (complain & tf_error)
2734 perform_or_defer_access_check (TYPE_BINFO (context), t);
2736 if (DECL_ARTIFICIAL (t) || !(complain & tf_keep_type_decl))
2744 /* If the CONTEXT is not a template type, then either the field is
2745 there now or its never going to be. */
2746 if (!dependent_type_p (context))
2748 if (complain & tf_error)
2749 error ("no type named %q#T in %q#T", name, context);
2750 return error_mark_node;
2753 return build_typename_type (context, name, fullname, tag_type);
2756 /* Resolve `CONTEXT::template NAME'. Returns a TEMPLATE_DECL if the name
2757 can be resolved or an UNBOUND_CLASS_TEMPLATE, unless an error occurs,
2758 in which case error_mark_node is returned.
2760 If PARM_LIST is non-NULL, also make sure that the template parameter
2761 list of TEMPLATE_DECL matches.
2763 If COMPLAIN zero, don't complain about any errors that occur. */
2766 make_unbound_class_template (tree context, tree name, tree parm_list,
2767 tsubst_flags_t complain)
2773 name = TYPE_IDENTIFIER (name);
2774 else if (DECL_P (name))
2775 name = DECL_NAME (name);
2776 gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE);
2778 if (!dependent_type_p (context)
2779 || currently_open_class (context))
2781 tree tmpl = NULL_TREE;
2783 if (IS_AGGR_TYPE (context))
2784 tmpl = lookup_field (context, name, 0, false);
2786 if (!tmpl || !DECL_CLASS_TEMPLATE_P (tmpl))
2788 if (complain & tf_error)
2789 error ("no class template named %q#T in %q#T", name, context);
2790 return error_mark_node;
2794 && !comp_template_parms (DECL_TEMPLATE_PARMS (tmpl), parm_list))
2796 if (complain & tf_error)
2798 error ("template parameters do not match template");
2799 cp_error_at ("%qD declared here", tmpl);
2801 return error_mark_node;
2804 if (complain & tf_error)
2805 perform_or_defer_access_check (TYPE_BINFO (context), tmpl);
2810 /* Build the UNBOUND_CLASS_TEMPLATE. */
2811 t = make_aggr_type (UNBOUND_CLASS_TEMPLATE);
2812 TYPE_CONTEXT (t) = FROB_CONTEXT (context);
2813 TREE_TYPE (t) = NULL_TREE;
2815 /* Build the corresponding TEMPLATE_DECL. */
2816 d = build_decl (TEMPLATE_DECL, name, t);
2817 TYPE_NAME (TREE_TYPE (d)) = d;
2818 TYPE_STUB_DECL (TREE_TYPE (d)) = d;
2819 DECL_CONTEXT (d) = FROB_CONTEXT (context);
2820 DECL_ARTIFICIAL (d) = 1;
2821 DECL_TEMPLATE_PARMS (d) = parm_list;
2828 /* Push the declarations of builtin types into the namespace.
2829 RID_INDEX is the index of the builtin type in the array
2830 RID_POINTERS. NAME is the name used when looking up the builtin
2831 type. TYPE is the _TYPE node for the builtin type. */
2834 record_builtin_type (enum rid rid_index,
2838 tree rname = NULL_TREE, tname = NULL_TREE;
2839 tree tdecl = NULL_TREE;
2841 if ((int) rid_index < (int) RID_MAX)
2842 rname = ridpointers[(int) rid_index];
2844 tname = get_identifier (name);
2846 /* The calls to SET_IDENTIFIER_GLOBAL_VALUE below should be
2847 eliminated. Built-in types should not be looked up name; their
2848 names are keywords that the parser can recognize. However, there
2849 is code in c-common.c that uses identifier_global_value to look
2850 up built-in types by name. */
2853 tdecl = build_decl (TYPE_DECL, tname, type);
2854 DECL_ARTIFICIAL (tdecl) = 1;
2855 SET_IDENTIFIER_GLOBAL_VALUE (tname, tdecl);
2861 tdecl = build_decl (TYPE_DECL, rname, type);
2862 DECL_ARTIFICIAL (tdecl) = 1;
2864 SET_IDENTIFIER_GLOBAL_VALUE (rname, tdecl);
2867 if (!TYPE_NAME (type))
2868 TYPE_NAME (type) = tdecl;
2871 debug_hooks->type_decl (tdecl, 0);
2874 /* Record one of the standard Java types.
2875 * Declare it as having the given NAME.
2876 * If SIZE > 0, it is the size of one of the integral types;
2877 * otherwise it is the negative of the size of one of the other types. */
2880 record_builtin_java_type (const char* name, int size)
2884 type = make_signed_type (size);
2885 else if (size > -32)
2886 { /* "__java_char" or ""__java_boolean". */
2887 type = make_unsigned_type (-size);
2888 /*if (size == -1) TREE_SET_CODE (type, BOOLEAN_TYPE);*/
2891 { /* "__java_float" or ""__java_double". */
2892 type = make_node (REAL_TYPE);
2893 TYPE_PRECISION (type) = - size;
2896 record_builtin_type (RID_MAX, name, type);
2897 decl = TYPE_NAME (type);
2899 /* Suppress generate debug symbol entries for these types,
2900 since for normal C++ they are just clutter.
2901 However, push_lang_context undoes this if extern "Java" is seen. */
2902 DECL_IGNORED_P (decl) = 1;
2904 TYPE_FOR_JAVA (type) = 1;
2908 /* Push a type into the namespace so that the back-ends ignore it. */
2911 record_unknown_type (tree type, const char* name)
2913 tree decl = pushdecl (build_decl (TYPE_DECL, get_identifier (name), type));
2914 /* Make sure the "unknown type" typedecl gets ignored for debug info. */
2915 DECL_IGNORED_P (decl) = 1;
2916 TYPE_DECL_SUPPRESS_DEBUG (decl) = 1;
2917 TYPE_SIZE (type) = TYPE_SIZE (void_type_node);
2918 TYPE_ALIGN (type) = 1;
2919 TYPE_USER_ALIGN (type) = 0;
2920 TYPE_MODE (type) = TYPE_MODE (void_type_node);
2923 /* An string for which we should create an IDENTIFIER_NODE at
2926 typedef struct predefined_identifier
2928 /* The name of the identifier. */
2929 const char *const name;
2930 /* The place where the IDENTIFIER_NODE should be stored. */
2932 /* Nonzero if this is the name of a constructor or destructor. */
2933 const int ctor_or_dtor_p;
2934 } predefined_identifier;
2936 /* Create all the predefined identifiers. */
2939 initialize_predefined_identifiers (void)
2941 const predefined_identifier *pid;
2943 /* A table of identifiers to create at startup. */
2944 static const predefined_identifier predefined_identifiers[] = {
2945 { "C++", &lang_name_cplusplus, 0 },
2946 { "C", &lang_name_c, 0 },
2947 { "Java", &lang_name_java, 0 },
2948 /* Some of these names have a trailing space so that it is
2949 impossible for them to conflict with names written by users. */
2950 { "__ct ", &ctor_identifier, 1 },
2951 { "__base_ctor ", &base_ctor_identifier, 1 },
2952 { "__comp_ctor ", &complete_ctor_identifier, 1 },
2953 { "__dt ", &dtor_identifier, 1 },
2954 { "__comp_dtor ", &complete_dtor_identifier, 1 },
2955 { "__base_dtor ", &base_dtor_identifier, 1 },
2956 { "__deleting_dtor ", &deleting_dtor_identifier, 1 },
2957 { IN_CHARGE_NAME, &in_charge_identifier, 0 },
2958 { "nelts", &nelts_identifier, 0 },
2959 { THIS_NAME, &this_identifier, 0 },
2960 { VTABLE_DELTA_NAME, &delta_identifier, 0 },
2961 { VTABLE_PFN_NAME, &pfn_identifier, 0 },
2962 { "_vptr", &vptr_identifier, 0 },
2963 { "__vtt_parm", &vtt_parm_identifier, 0 },
2964 { "::", &global_scope_name, 0 },
2965 { "std", &std_identifier, 0 },
2969 for (pid = predefined_identifiers; pid->name; ++pid)
2971 *pid->node = get_identifier (pid->name);
2972 if (pid->ctor_or_dtor_p)
2973 IDENTIFIER_CTOR_OR_DTOR_P (*pid->node) = 1;
2977 /* Create the predefined scalar types of C,
2978 and some nodes representing standard constants (0, 1, (void *)0).
2979 Initialize the global binding level.
2980 Make definitions for built-in primitive functions. */
2983 cxx_init_decl_processing (void)
2986 tree void_ftype_ptr;
2988 build_common_tree_nodes (flag_signed_char, false);
2990 /* Create all the identifiers we need. */
2991 initialize_predefined_identifiers ();
2993 /* Create the global variables. */
2994 push_to_top_level ();
2996 current_function_decl = NULL_TREE;
2997 current_binding_level = NULL;
2998 /* Enter the global namespace. */
2999 gcc_assert (global_namespace == NULL_TREE);
3000 global_namespace = build_lang_decl (NAMESPACE_DECL, global_scope_name,
3002 begin_scope (sk_namespace, global_namespace);
3004 current_lang_name = NULL_TREE;
3006 /* Adjust various flags based on command-line settings. */
3007 if (!flag_permissive)
3008 flag_pedantic_errors = 1;
3009 if (!flag_no_inline)
3011 flag_inline_trees = 1;
3014 if (flag_inline_functions)
3015 flag_inline_trees = 2;
3017 /* Force minimum function alignment if using the least significant
3018 bit of function pointers to store the virtual bit. */
3019 if (TARGET_PTRMEMFUNC_VBIT_LOCATION == ptrmemfunc_vbit_in_pfn
3020 && force_align_functions_log < 1)
3021 force_align_functions_log = 1;
3024 current_lang_name = lang_name_c;
3026 error_mark_list = build_tree_list (error_mark_node, error_mark_node);
3027 TREE_TYPE (error_mark_list) = error_mark_node;
3029 /* Create the `std' namespace. */
3030 push_namespace (std_identifier);
3031 std_node = current_namespace;
3034 c_common_nodes_and_builtins ();
3036 java_byte_type_node = record_builtin_java_type ("__java_byte", 8);
3037 java_short_type_node = record_builtin_java_type ("__java_short", 16);
3038 java_int_type_node = record_builtin_java_type ("__java_int", 32);
3039 java_long_type_node = record_builtin_java_type ("__java_long", 64);
3040 java_float_type_node = record_builtin_java_type ("__java_float", -32);
3041 java_double_type_node = record_builtin_java_type ("__java_double", -64);
3042 java_char_type_node = record_builtin_java_type ("__java_char", -16);
3043 java_boolean_type_node = record_builtin_java_type ("__java_boolean", -1);
3045 integer_two_node = build_int_cst (NULL_TREE, 2);
3046 integer_three_node = build_int_cst (NULL_TREE, 3);
3048 record_builtin_type (RID_BOOL, "bool", boolean_type_node);
3049 truthvalue_type_node = boolean_type_node;
3050 truthvalue_false_node = boolean_false_node;
3051 truthvalue_true_node = boolean_true_node;
3053 empty_except_spec = build_tree_list (NULL_TREE, NULL_TREE);
3056 record_builtin_type (RID_MAX, NULL, string_type_node);
3059 delta_type_node = ptrdiff_type_node;
3060 vtable_index_type = ptrdiff_type_node;
3062 vtt_parm_type = build_pointer_type (const_ptr_type_node);
3063 void_ftype = build_function_type (void_type_node, void_list_node);
3064 void_ftype_ptr = build_function_type (void_type_node,
3065 tree_cons (NULL_TREE,
3069 = build_exception_variant (void_ftype_ptr, empty_except_spec);
3071 /* C++ extensions */
3073 unknown_type_node = make_node (UNKNOWN_TYPE);
3074 record_unknown_type (unknown_type_node, "unknown type");
3076 /* Indirecting an UNKNOWN_TYPE node yields an UNKNOWN_TYPE node. */
3077 TREE_TYPE (unknown_type_node) = unknown_type_node;
3079 /* Looking up TYPE_POINTER_TO and TYPE_REFERENCE_TO yield the same
3081 TYPE_POINTER_TO (unknown_type_node) = unknown_type_node;
3082 TYPE_REFERENCE_TO (unknown_type_node) = unknown_type_node;
3085 /* Make sure we get a unique function type, so we can give
3086 its pointer type a name. (This wins for gdb.) */
3087 tree vfunc_type = make_node (FUNCTION_TYPE);
3088 TREE_TYPE (vfunc_type) = integer_type_node;
3089 TYPE_ARG_TYPES (vfunc_type) = NULL_TREE;
3090 layout_type (vfunc_type);
3092 vtable_entry_type = build_pointer_type (vfunc_type);
3094 record_builtin_type (RID_MAX, VTBL_PTR_TYPE, vtable_entry_type);
3097 = build_cplus_array_type (vtable_entry_type, NULL_TREE);
3098 layout_type (vtbl_type_node);
3099 vtbl_type_node = build_qualified_type (vtbl_type_node, TYPE_QUAL_CONST);
3100 record_builtin_type (RID_MAX, NULL, vtbl_type_node);
3101 vtbl_ptr_type_node = build_pointer_type (vtable_entry_type);
3102 layout_type (vtbl_ptr_type_node);
3103 record_builtin_type (RID_MAX, NULL, vtbl_ptr_type_node);
3105 push_namespace (get_identifier ("__cxxabiv1"));
3106 abi_node = current_namespace;
3109 global_type_node = make_node (LANG_TYPE);
3110 record_unknown_type (global_type_node, "global type");
3113 current_lang_name = lang_name_cplusplus;
3117 tree bad_alloc_type_node;
3118 tree bad_alloc_decl;
3119 tree newtype, deltype;
3120 tree ptr_ftype_sizetype;
3122 push_namespace (std_identifier);
3123 bad_alloc_id = get_identifier ("bad_alloc");
3124 bad_alloc_type_node = make_aggr_type (RECORD_TYPE);
3125 TYPE_CONTEXT (bad_alloc_type_node) = current_namespace;
3127 = create_implicit_typedef (bad_alloc_id, bad_alloc_type_node);
3128 DECL_CONTEXT (bad_alloc_decl) = current_namespace;
3129 TYPE_STUB_DECL (bad_alloc_type_node) = bad_alloc_decl;
3133 = build_function_type (ptr_type_node,
3134 tree_cons (NULL_TREE,
3137 newtype = build_exception_variant
3138 (ptr_ftype_sizetype, add_exception_specifier
3139 (NULL_TREE, bad_alloc_type_node, -1));
3140 deltype = build_exception_variant (void_ftype_ptr, empty_except_spec);
3141 push_cp_library_fn (NEW_EXPR, newtype);
3142 push_cp_library_fn (VEC_NEW_EXPR, newtype);
3143 global_delete_fndecl = push_cp_library_fn (DELETE_EXPR, deltype);
3144 push_cp_library_fn (VEC_DELETE_EXPR, deltype);
3148 = build_library_fn_ptr ("__cxa_pure_virtual", void_ftype);
3150 /* Perform other language dependent initializations. */
3151 init_class_processing ();
3152 init_rtti_processing ();
3154 if (flag_exceptions)
3155 init_exception_processing ();
3157 if (! supports_one_only ())
3160 make_fname_decl = cp_make_fname_decl;
3161 start_fname_decls ();
3163 /* Show we use EH for cleanups. */
3164 if (flag_exceptions)
3165 using_eh_for_cleanups ();
3168 /* Generate an initializer for a function naming variable from
3169 NAME. NAME may be NULL, to indicate a dependent name. TYPE_P is
3170 filled in with the type of the init. */
3173 cp_fname_init (const char* name, tree *type_p)
3175 tree domain = NULL_TREE;
3177 tree init = NULL_TREE;
3182 length = strlen (name);
3183 domain = build_index_type (size_int (length));
3184 init = build_string (length + 1, name);
3187 type = build_qualified_type (char_type_node, TYPE_QUAL_CONST);
3188 type = build_cplus_array_type (type, domain);
3193 TREE_TYPE (init) = type;
3195 init = error_mark_node;
3200 /* Create the VAR_DECL for __FUNCTION__ etc. ID is the name to give the
3201 decl, NAME is the initialization string and TYPE_DEP indicates whether
3202 NAME depended on the type of the function. We make use of that to detect
3203 __PRETTY_FUNCTION__ inside a template fn. This is being done
3204 lazily at the point of first use, so we mustn't push the decl now. */
3207 cp_make_fname_decl (tree id, int type_dep)
3209 const char *const name = (type_dep && processing_template_decl
3210 ? NULL : fname_as_string (type_dep));
3212 tree init = cp_fname_init (name, &type);
3213 tree decl = build_decl (VAR_DECL, id, type);
3216 free ((char *) name);
3218 /* As we're using pushdecl_with_scope, we must set the context. */
3219 DECL_CONTEXT (decl) = current_function_decl;
3220 DECL_PRETTY_FUNCTION_P (decl) = type_dep;
3222 TREE_STATIC (decl) = 1;
3223 TREE_READONLY (decl) = 1;
3224 DECL_ARTIFICIAL (decl) = 1;
3225 DECL_INITIAL (decl) = init;
3227 TREE_USED (decl) = 1;
3229 if (current_function_decl)
3231 struct cp_binding_level *b = current_binding_level;
3232 while (b->level_chain->kind != sk_function_parms)
3234 pushdecl_with_scope (decl, b);
3235 cp_finish_decl (decl, init, NULL_TREE, LOOKUP_ONLYCONVERTING);
3238 pushdecl_top_level_and_finish (decl, init);
3243 /* Make a definition for a builtin function named NAME in the current
3244 namespace, whose data type is TYPE and whose context is CONTEXT.
3245 TYPE should be a function type with argument types.
3247 CLASS and CODE tell later passes how to compile calls to this function.
3248 See tree.h for possible values.
3250 If LIBNAME is nonzero, use that for DECL_ASSEMBLER_NAME,
3251 the name to be called if we can't opencode the function.
3252 If ATTRS is nonzero, use that for the function's attribute
3256 builtin_function_1 (const char* name,
3259 enum built_in_function code,
3260 enum built_in_class class,
3261 const char* libname,
3264 tree decl = build_library_fn_1 (get_identifier (name), ERROR_MARK, type);
3265 DECL_BUILT_IN_CLASS (decl) = class;
3266 DECL_FUNCTION_CODE (decl) = code;
3267 DECL_CONTEXT (decl) = context;
3271 /* Since `pushdecl' relies on DECL_ASSEMBLER_NAME instead of DECL_NAME,
3272 we cannot change DECL_ASSEMBLER_NAME until we have installed this
3273 function in the namespace. */
3275 SET_DECL_ASSEMBLER_NAME (decl, get_identifier (libname));
3277 /* Warn if a function in the namespace for users
3278 is used without an occasion to consider it declared. */
3279 if (name[0] != '_' || name[1] != '_')
3280 DECL_ANTICIPATED (decl) = 1;
3282 /* Possibly apply some default attributes to this built-in function. */
3284 decl_attributes (&decl, attrs, ATTR_FLAG_BUILT_IN);
3286 decl_attributes (&decl, NULL_TREE, 0);
3291 /* Entry point for the benefit of c_common_nodes_and_builtins.
3293 Make a definition for a builtin function named NAME and whose data type
3294 is TYPE. TYPE should be a function type with argument types. This
3295 function places the anticipated declaration in the global namespace
3296 and additionally in the std namespace if appropriate.
3298 CLASS and CODE tell later passes how to compile calls to this function.
3299 See tree.h for possible values.
3301 If LIBNAME is nonzero, use that for DECL_ASSEMBLER_NAME,
3302 the name to be called if we can't opencode the function.
3304 If ATTRS is nonzero, use that for the function's attribute
3308 builtin_function (const char* name,
3311 enum built_in_class cl,
3312 const char* libname,
3315 /* All builtins that don't begin with an '_' should additionally
3316 go in the 'std' namespace. */
3319 push_namespace (std_identifier);
3320 builtin_function_1 (name, type, std_node, code, cl, libname, attrs);
3324 return builtin_function_1 (name, type, NULL_TREE, code,
3325 cl, libname, attrs);
3328 /* Generate a FUNCTION_DECL with the typical flags for a runtime library
3329 function. Not called directly. */
3332 build_library_fn_1 (tree name, enum tree_code operator_code, tree type)
3334 tree fn = build_lang_decl (FUNCTION_DECL, name, type);
3335 DECL_EXTERNAL (fn) = 1;
3336 TREE_PUBLIC (fn) = 1;
3337 DECL_ARTIFICIAL (fn) = 1;
3338 TREE_NOTHROW (fn) = 1;
3339 SET_OVERLOADED_OPERATOR_CODE (fn, operator_code);
3340 SET_DECL_LANGUAGE (fn, lang_c);
3341 /* Runtime library routines are, by definition, available in an
3342 external shared object. */
3343 DECL_VISIBILITY (fn) = VISIBILITY_DEFAULT;
3344 DECL_VISIBILITY_SPECIFIED (fn) = 1;
3348 /* Returns the _DECL for a library function with C linkage.
3349 We assume that such functions never throw; if this is incorrect,
3350 callers should unset TREE_NOTHROW. */
3353 build_library_fn (tree name, tree type)
3355 return build_library_fn_1 (name, ERROR_MARK, type);
3358 /* Returns the _DECL for a library function with C++ linkage. */
3361 build_cp_library_fn (tree name, enum tree_code operator_code, tree type)
3363 tree fn = build_library_fn_1 (name, operator_code, type);
3364 TREE_NOTHROW (fn) = TYPE_NOTHROW_P (type);
3365 DECL_CONTEXT (fn) = FROB_CONTEXT (current_namespace);
3366 SET_DECL_LANGUAGE (fn, lang_cplusplus);
3370 /* Like build_library_fn, but takes a C string instead of an
3374 build_library_fn_ptr (const char* name, tree type)
3376 return build_library_fn (get_identifier (name), type);
3379 /* Like build_cp_library_fn, but takes a C string instead of an
3383 build_cp_library_fn_ptr (const char* name, tree type)
3385 return build_cp_library_fn (get_identifier (name), ERROR_MARK, type);
3388 /* Like build_library_fn, but also pushes the function so that we will
3389 be able to find it via IDENTIFIER_GLOBAL_VALUE. */
3392 push_library_fn (tree name, tree type)
3394 tree fn = build_library_fn (name, type);
3395 pushdecl_top_level (fn);
3399 /* Like build_cp_library_fn, but also pushes the function so that it
3400 will be found by normal lookup. */
3403 push_cp_library_fn (enum tree_code operator_code, tree type)
3405 tree fn = build_cp_library_fn (ansi_opname (operator_code),
3412 /* Like push_library_fn, but takes a TREE_LIST of parm types rather than
3416 push_void_library_fn (tree name, tree parmtypes)
3418 tree type = build_function_type (void_type_node, parmtypes);
3419 return push_library_fn (name, type);
3422 /* Like push_library_fn, but also note that this function throws
3423 and does not return. Used for __throw_foo and the like. */
3426 push_throw_library_fn (tree name, tree type)
3428 tree fn = push_library_fn (name, type);
3429 TREE_THIS_VOLATILE (fn) = 1;
3430 TREE_NOTHROW (fn) = 0;
3434 /* When we call finish_struct for an anonymous union, we create
3435 default copy constructors and such. But, an anonymous union
3436 shouldn't have such things; this function undoes the damage to the
3437 anonymous union type T.
3439 (The reason that we create the synthesized methods is that we don't
3440 distinguish `union { int i; }' from `typedef union { int i; } U'.
3441 The first is an anonymous union; the second is just an ordinary
3445 fixup_anonymous_aggr (tree t)
3449 /* Wipe out memory of synthesized methods. */
3450 TYPE_HAS_CONSTRUCTOR (t) = 0;
3451 TYPE_HAS_DEFAULT_CONSTRUCTOR (t) = 0;
3452 TYPE_HAS_INIT_REF (t) = 0;
3453 TYPE_HAS_CONST_INIT_REF (t) = 0;
3454 TYPE_HAS_ASSIGN_REF (t) = 0;
3455 TYPE_HAS_CONST_ASSIGN_REF (t) = 0;
3457 /* Splice the implicitly generated functions out of the TYPE_METHODS
3459 q = &TYPE_METHODS (t);
3462 if (DECL_ARTIFICIAL (*q))
3463 *q = TREE_CHAIN (*q);
3465 q = &TREE_CHAIN (*q);
3468 /* ISO C++ 9.5.3. Anonymous unions may not have function members. */
3469 if (TYPE_METHODS (t))
3470 error ("%Jan anonymous union cannot have function members",
3471 TYPE_MAIN_DECL (t));
3473 /* Anonymous aggregates cannot have fields with ctors, dtors or complex
3474 assignment operators (because they cannot have these methods themselves).
3475 For anonymous unions this is already checked because they are not allowed
3476 in any union, otherwise we have to check it. */
3477 if (TREE_CODE (t) != UNION_TYPE)
3481 for (field = TYPE_FIELDS (t); field; field = TREE_CHAIN (field))
3482 if (TREE_CODE (field) == FIELD_DECL)
3484 type = TREE_TYPE (field);
3485 if (CLASS_TYPE_P (type))
3487 if (TYPE_NEEDS_CONSTRUCTING (type))
3488 cp_error_at ("member %q#D with constructor not allowed "
3489 "in anonymous aggregate",
3491 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type))
3492 cp_error_at ("member %q#D with destructor not allowed "
3493 "in anonymous aggregate",
3495 if (TYPE_HAS_COMPLEX_ASSIGN_REF (type))
3496 cp_error_at ("member %q#D with copy assignment operator "
3497 "not allowed in anonymous aggregate",
3504 /* Make sure that a declaration with no declarator is well-formed, i.e.
3505 just declares a tagged type or anonymous union.
3507 Returns the type declared; or NULL_TREE if none. */
3510 check_tag_decl (cp_decl_specifier_seq *declspecs)
3512 int saw_friend = declspecs->specs[(int)ds_friend] != 0;
3513 int saw_typedef = declspecs->specs[(int)ds_typedef] != 0;
3514 /* If a class, struct, or enum type is declared by the DECLSPECS
3515 (i.e, if a class-specifier, enum-specifier, or non-typename
3516 elaborated-type-specifier appears in the DECLSPECS),
3517 DECLARED_TYPE is set to the corresponding type. */
3518 tree declared_type = NULL_TREE;
3519 bool error_p = false;
3521 if (declspecs->multiple_types_p)
3522 error ("multiple types in one declaration");
3523 else if (declspecs->redefined_builtin_type)
3525 if (!in_system_header)
3526 pedwarn ("redeclaration of C++ built-in type %qT",
3527 declspecs->redefined_builtin_type);
3532 && TYPE_P (declspecs->type)
3533 && ((TREE_CODE (declspecs->type) != TYPENAME_TYPE
3534 && IS_AGGR_TYPE (declspecs->type))
3535 || TREE_CODE (declspecs->type) == ENUMERAL_TYPE))
3536 declared_type = declspecs->type;
3537 else if (declspecs->type == error_mark_node)
3539 if (declared_type == NULL_TREE && ! saw_friend && !error_p)
3540 pedwarn ("declaration does not declare anything");
3541 /* Check for an anonymous union. */
3542 else if (declared_type && IS_AGGR_TYPE_CODE (TREE_CODE (declared_type))
3543 && TYPE_ANONYMOUS_P (declared_type))
3545 /* 7/3 In a simple-declaration, the optional init-declarator-list
3546 can be omitted only when declaring a class (clause 9) or
3547 enumeration (7.2), that is, when the decl-specifier-seq contains
3548 either a class-specifier, an elaborated-type-specifier with
3549 a class-key (9.1), or an enum-specifier. In these cases and
3550 whenever a class-specifier or enum-specifier is present in the
3551 decl-specifier-seq, the identifiers in these specifiers are among
3552 the names being declared by the declaration (as class-name,
3553 enum-names, or enumerators, depending on the syntax). In such
3554 cases, and except for the declaration of an unnamed bit-field (9.6),
3555 the decl-specifier-seq shall introduce one or more names into the
3556 program, or shall redeclare a name introduced by a previous
3557 declaration. [Example:
3558 enum { }; // ill-formed
3559 typedef class { }; // ill-formed
3563 error ("missing type-name in typedef-declaration");
3566 /* Anonymous unions are objects, so they can have specifiers. */;
3567 SET_ANON_AGGR_TYPE_P (declared_type);
3569 if (TREE_CODE (declared_type) != UNION_TYPE && pedantic
3570 && !in_system_header)
3571 pedwarn ("ISO C++ prohibits anonymous structs");
3576 if (declspecs->specs[(int)ds_inline]
3577 || declspecs->specs[(int)ds_virtual])
3578 error ("%qs can only be specified for functions",
3579 declspecs->specs[(int)ds_inline]
3580 ? "inline" : "virtual");
3582 && (!current_class_type
3583 || current_scope () != current_class_type))
3584 error ("%<friend%> can only be specified inside a class");
3585 else if (declspecs->specs[(int)ds_explicit])
3586 error ("%<explicit%> can only be specified for constructors");
3587 else if (declspecs->storage_class)
3588 error ("a storage class can only be specified for objects "
3590 else if (declspecs->specs[(int)ds_const]
3591 || declspecs->specs[(int)ds_volatile]
3592 || declspecs->specs[(int)ds_restrict]
3593 || declspecs->specs[(int)ds_thread])
3594 error ("qualifiers can only be specified for objects "
3598 return declared_type;
3601 /* Called when a declaration is seen that contains no names to declare.
3602 If its type is a reference to a structure, union or enum inherited
3603 from a containing scope, shadow that tag name for the current scope
3604 with a forward reference.
3605 If its type defines a new named structure or union
3606 or defines an enum, it is valid but we need not do anything here.
3607 Otherwise, it is an error.
3609 C++: may have to grok the declspecs to learn about static,
3610 complain for anonymous unions.
3612 Returns the TYPE declared -- or NULL_TREE if none. */
3615 shadow_tag (cp_decl_specifier_seq *declspecs)
3617 tree t = check_tag_decl (declspecs);
3622 if (declspecs->attributes)
3624 cp_warning_at ("attribute ignored in declaration of %q#T", t);
3625 cp_warning_at ("attribute for %q#T must follow the %qs keyword",
3627 class_key_or_enum_as_string (t));
3631 maybe_process_partial_specialization (t);
3633 /* This is where the variables in an anonymous union are
3634 declared. An anonymous union declaration looks like:
3636 because there is no declarator after the union, the parser
3637 sends that declaration here. */
3638 if (ANON_AGGR_TYPE_P (t))
3640 fixup_anonymous_aggr (t);
3642 if (TYPE_FIELDS (t))
3644 tree decl = grokdeclarator (/*declarator=*/NULL,
3645 declspecs, NORMAL, 0, NULL);
3646 finish_anon_union (decl);
3653 /* Decode a "typename", such as "int **", returning a ..._TYPE node. */
3656 groktypename (cp_decl_specifier_seq *type_specifiers,
3657 const cp_declarator *declarator)
3661 attrs = type_specifiers->attributes;
3662 type_specifiers->attributes = NULL_TREE;
3663 type = grokdeclarator (declarator, type_specifiers, TYPENAME, 0, &attrs);
3665 cplus_decl_attributes (&type, attrs, 0);
3669 /* Decode a declarator in an ordinary declaration or data definition.
3670 This is called as soon as the type information and variable name
3671 have been parsed, before parsing the initializer if any.
3672 Here we create the ..._DECL node, fill in its type,
3673 and put it on the list of decls for the current context.
3674 The ..._DECL node is returned as the value.
3676 Exception: for arrays where the length is not specified,
3677 the type is left null, to be filled in by `cp_finish_decl'.
3679 Function definitions do not come here; they go to start_function
3680 instead. However, external and forward declarations of functions
3681 do go through here. Structure field declarations are done by
3682 grokfield and not through here. */
3685 start_decl (const cp_declarator *declarator,
3686 cp_decl_specifier_seq *declspecs,
3689 tree prefix_attributes,
3690 tree *pushed_scope_p)
3696 *pushed_scope_p = NULL_TREE;
3698 /* This should only be done once on the top most decl. */
3699 if (have_extern_spec)
3701 declspecs->storage_class = sc_extern;
3702 have_extern_spec = false;
3705 /* An object declared as __attribute__((deprecated)) suppresses
3706 warnings of uses of other deprecated items. */
3707 if (lookup_attribute ("deprecated", attributes))
3708 deprecated_state = DEPRECATED_SUPPRESS;
3710 attributes = chainon (attributes, prefix_attributes);
3712 decl = grokdeclarator (declarator, declspecs, NORMAL, initialized,
3715 deprecated_state = DEPRECATED_NORMAL;
3717 if (decl == NULL_TREE || TREE_CODE (decl) == VOID_TYPE)
3718 return error_mark_node;
3720 type = TREE_TYPE (decl);
3722 if (type == error_mark_node)
3723 return error_mark_node;
3725 context = DECL_CONTEXT (decl);
3729 *pushed_scope_p = push_scope (context);
3731 /* We are only interested in class contexts, later. */
3732 if (TREE_CODE (context) == NAMESPACE_DECL)
3733 context = NULL_TREE;
3737 /* Is it valid for this decl to have an initializer at all?
3738 If not, set INITIALIZED to zero, which will indirectly
3739 tell `cp_finish_decl' to ignore the initializer once it is parsed. */
3740 switch (TREE_CODE (decl))
3743 error ("typedef %qD is initialized (use __typeof__ instead)", decl);
3748 error ("function %q#D is initialized like a variable", decl);
3758 if (! toplevel_bindings_p ()
3759 && DECL_EXTERNAL (decl))
3760 warning ("declaration of %q#D has %<extern%> and is initialized",
3762 DECL_EXTERNAL (decl) = 0;
3763 if (toplevel_bindings_p ())
3764 TREE_STATIC (decl) = 1;
3766 /* Tell `pushdecl' this is an initialized decl
3767 even though we don't yet have the initializer expression.
3768 Also tell `cp_finish_decl' it may store the real initializer. */
3769 DECL_INITIAL (decl) = error_mark_node;
3772 /* Set attributes here so if duplicate decl, will have proper attributes. */
3773 cplus_decl_attributes (&decl, attributes, 0);
3775 /* If #pragma weak was used, mark the decl weak now. */
3776 if (global_scope_p (current_binding_level))
3777 maybe_apply_pragma_weak (decl);
3779 if (TREE_CODE (decl) == FUNCTION_DECL
3780 && DECL_DECLARED_INLINE_P (decl)
3781 && DECL_UNINLINABLE (decl)
3782 && lookup_attribute ("noinline", DECL_ATTRIBUTES (decl)))
3783 warning ("%Jinline function %qD given attribute noinline", decl, decl);
3785 if (context && COMPLETE_TYPE_P (complete_type (context)))
3787 if (TREE_CODE (decl) == VAR_DECL)
3789 tree field = lookup_field (context, DECL_NAME (decl), 0, false);
3790 if (field == NULL_TREE || TREE_CODE (field) != VAR_DECL)
3791 error ("%q#D is not a static member of %q#T", decl, context);
3794 if (DECL_CONTEXT (field) != context)
3796 if (!same_type_p (DECL_CONTEXT (field), context))
3797 pedwarn ("ISO C++ does not permit %<%T::%D%> "
3798 "to be defined as %<%T::%D%>",
3799 DECL_CONTEXT (field), DECL_NAME (decl),
3800 context, DECL_NAME (decl));
3801 DECL_CONTEXT (decl) = DECL_CONTEXT (field);
3803 if (processing_specialization
3804 && template_class_depth (context) == 0
3805 && CLASSTYPE_TEMPLATE_SPECIALIZATION (context))
3806 error ("template header not allowed in member definition "
3807 "of explicitly specialized class");
3808 /* Static data member are tricky; an in-class initialization
3809 still doesn't provide a definition, so the in-class
3810 declaration will have DECL_EXTERNAL set, but will have an
3811 initialization. Thus, duplicate_decls won't warn
3812 about this situation, and so we check here. */
3813 if (DECL_INITIAL (decl) && DECL_INITIAL (field))
3814 error ("duplicate initialization of %qD", decl);
3815 if (duplicate_decls (decl, field))
3821 tree field = check_classfn (context, decl,
3822 (processing_template_decl
3823 > template_class_depth (context))
3824 ? current_template_parms
3826 if (field && duplicate_decls (decl, field))
3830 /* cp_finish_decl sets DECL_EXTERNAL if DECL_IN_AGGR_P is set. */
3831 DECL_IN_AGGR_P (decl) = 0;
3832 if ((DECL_LANG_SPECIFIC (decl) && DECL_USE_TEMPLATE (decl))
3833 || CLASSTYPE_TEMPLATE_INSTANTIATION (context))
3835 SET_DECL_TEMPLATE_SPECIALIZATION (decl);
3836 /* [temp.expl.spec] An explicit specialization of a static data
3837 member of a template is a definition if the declaration
3838 includes an initializer; otherwise, it is a declaration.
3840 We check for processing_specialization so this only applies
3841 to the new specialization syntax. */
3842 if (DECL_INITIAL (decl) == NULL_TREE && processing_specialization)
3843 DECL_EXTERNAL (decl) = 1;
3846 if (DECL_EXTERNAL (decl) && ! DECL_TEMPLATE_SPECIALIZATION (decl))
3847 pedwarn ("declaration of %q#D outside of class is not definition",
3851 /* Enter this declaration into the symbol table. */
3852 tem = maybe_push_decl (decl);
3854 if (processing_template_decl)
3855 tem = push_template_decl (tem);
3856 if (tem == error_mark_node)
3857 return error_mark_node;
3859 #if ! defined (ASM_OUTPUT_BSS) && ! defined (ASM_OUTPUT_ALIGNED_BSS)
3860 /* Tell the back-end to use or not use .common as appropriate. If we say
3861 -fconserve-space, we want this to save .data space, at the expense of
3862 wrong semantics. If we say -fno-conserve-space, we want this to
3863 produce errors about redefs; to do this we force variables into the
3865 DECL_COMMON (tem) = ((TREE_CODE (tem) != VAR_DECL
3866 || !DECL_THREAD_LOCAL (tem))
3867 && (flag_conserve_space || ! TREE_PUBLIC (tem)));
3870 if (! processing_template_decl)
3877 start_decl_1 (tree decl)
3879 tree type = TREE_TYPE (decl);
3880 int initialized = (DECL_INITIAL (decl) != NULL_TREE);
3882 if (type == error_mark_node)
3886 /* Is it valid for this decl to have an initializer at all?
3887 If not, set INITIALIZED to zero, which will indirectly
3888 tell `cp_finish_decl' to ignore the initializer once it is parsed. */
3890 /* Don't allow initializations for incomplete types except for
3891 arrays which might be completed by the initialization. */
3892 if (COMPLETE_TYPE_P (complete_type (type)))
3893 ; /* A complete type is ok. */
3894 else if (TREE_CODE (type) != ARRAY_TYPE)
3896 error ("variable %q#D has initializer but incomplete type", decl);
3898 type = TREE_TYPE (decl) = error_mark_node;
3900 else if (!COMPLETE_TYPE_P (complete_type (TREE_TYPE (type))))
3902 if (DECL_LANG_SPECIFIC (decl) && DECL_TEMPLATE_INFO (decl))
3903 error ("elements of array %q#D have incomplete type", decl);
3904 /* else we already gave an error in start_decl. */
3910 && TREE_CODE (decl) != TYPE_DECL
3911 && TREE_CODE (decl) != TEMPLATE_DECL
3912 && type != error_mark_node
3913 && IS_AGGR_TYPE (type)
3914 && ! DECL_EXTERNAL (decl))
3916 if ((! processing_template_decl || ! uses_template_parms (type))
3917 && !COMPLETE_TYPE_P (complete_type (type)))
3919 error ("aggregate %q#D has incomplete type and cannot be defined",
3921 /* Change the type so that assemble_variable will give
3922 DECL an rtl we can live with: (mem (const_int 0)). */
3923 type = TREE_TYPE (decl) = error_mark_node;
3927 /* If any base type in the hierarchy of TYPE needs a constructor,
3928 then we set initialized to 1. This way any nodes which are
3929 created for the purposes of initializing this aggregate
3930 will live as long as it does. This is necessary for global
3931 aggregates which do not have their initializers processed until
3932 the end of the file. */
3933 initialized = TYPE_NEEDS_CONSTRUCTING (type);
3938 DECL_INITIAL (decl) = NULL_TREE;
3940 /* Create a new scope to hold this declaration if necessary.
3941 Whether or not a new scope is necessary cannot be determined
3942 until after the type has been completed; if the type is a
3943 specialization of a class template it is not until after
3944 instantiation has occurred that TYPE_HAS_NONTRIVIAL_DESTRUCTOR
3945 will be set correctly. */
3946 maybe_push_cleanup_level (type);
3949 /* Handle initialization of references. DECL, TYPE, and INIT have the
3950 same meaning as in cp_finish_decl. *CLEANUP must be NULL on entry,
3951 but will be set to a new CLEANUP_STMT if a temporary is created
3952 that must be destroyed subsequently.
3954 Returns an initializer expression to use to initialize DECL, or
3955 NULL if the initialization can be performed statically.
3957 Quotes on semantics can be found in ARM 8.4.3. */
3960 grok_reference_init (tree decl, tree type, tree init, tree *cleanup)
3964 if (init == NULL_TREE)
3966 if ((DECL_LANG_SPECIFIC (decl) == 0
3967 || DECL_IN_AGGR_P (decl) == 0)
3968 && ! DECL_THIS_EXTERN (decl))
3969 error ("%qD declared as reference but not initialized", decl);
3973 if (TREE_CODE (init) == CONSTRUCTOR)
3975 error ("ISO C++ forbids use of initializer list to "
3976 "initialize reference %qD", decl);
3980 if (TREE_CODE (init) == TREE_LIST)
3981 init = build_x_compound_expr_from_list (init, "initializer");
3983 if (TREE_CODE (TREE_TYPE (type)) != ARRAY_TYPE
3984 && TREE_CODE (TREE_TYPE (init)) == ARRAY_TYPE)
3985 /* Note: default conversion is only called in very special cases. */
3986 init = decay_conversion (init);
3988 /* Convert INIT to the reference type TYPE. This may involve the
3989 creation of a temporary, whose lifetime must be the same as that
3990 of the reference. If so, a DECL_EXPR for the temporary will be
3991 added just after the DECL_EXPR for DECL. That's why we don't set
3992 DECL_INITIAL for local references (instead assigning to them
3993 explicitly); we need to allow the temporary to be initialized
3995 tmp = initialize_reference (type, init, decl, cleanup);
3997 if (tmp == error_mark_node)
3999 else if (tmp == NULL_TREE)
4001 error ("cannot initialize %qT from %qT", type, TREE_TYPE (init));
4005 if (TREE_STATIC (decl) && !TREE_CONSTANT (tmp))
4008 DECL_INITIAL (decl) = tmp;
4013 /* When parsing `int a[] = {1, 2};' we don't know the size of the
4014 array until we finish parsing the initializer. If that's the
4015 situation we're in, update DECL accordingly. */
4018 maybe_deduce_size_from_array_init (tree decl, tree init)
4020 tree type = TREE_TYPE (decl);
4022 if (TREE_CODE (type) == ARRAY_TYPE
4023 && TYPE_DOMAIN (type) == NULL_TREE
4024 && TREE_CODE (decl) != TYPE_DECL)
4026 /* do_default is really a C-ism to deal with tentative definitions.
4027 But let's leave it here to ease the eventual merge. */
4028 int do_default = !DECL_EXTERNAL (decl);
4029 tree initializer = init ? init : DECL_INITIAL (decl);
4030 int failure = complete_array_type (type, initializer, do_default);
4033 error ("initializer fails to determine size of %qD", decl);
4038 error ("array size missing in %qD", decl);
4039 /* If a `static' var's size isn't known, make it extern as
4040 well as static, so it does not get allocated. If it's not
4041 `static', then don't mark it extern; finish_incomplete_decl
4042 will give it a default size and it will get allocated. */
4043 else if (!pedantic && TREE_STATIC (decl) && !TREE_PUBLIC (decl))
4044 DECL_EXTERNAL (decl) = 1;
4047 if (pedantic && TYPE_DOMAIN (type) != NULL_TREE
4048 && tree_int_cst_lt (TYPE_MAX_VALUE (TYPE_DOMAIN (type)),
4050 error ("zero-size array %qD", decl);
4052 layout_decl (decl, 0);
4056 /* Set DECL_SIZE, DECL_ALIGN, etc. for DECL (a VAR_DECL), and issue
4057 any appropriate error messages regarding the layout. */
4060 layout_var_decl (tree decl)
4062 tree type = TREE_TYPE (decl);
4064 tree ttype = target_type (type);
4067 /* If we haven't already layed out this declaration, do so now.
4068 Note that we must not call complete type for an external object
4069 because it's type might involve templates that we are not
4070 supposed to instantiate yet. (And it's perfectly valid to say
4071 `extern X x' for some incomplete type `X'.) */
4072 if (!DECL_EXTERNAL (decl))
4073 complete_type (type);
4074 if (!DECL_SIZE (decl)
4075 && TREE_TYPE (decl) != error_mark_node
4076 && (COMPLETE_TYPE_P (type)
4077 || (TREE_CODE (type) == ARRAY_TYPE
4078 && !TYPE_DOMAIN (type)
4079 && COMPLETE_TYPE_P (TREE_TYPE (type)))))
4080 layout_decl (decl, 0);
4082 if (!DECL_EXTERNAL (decl) && DECL_SIZE (decl) == NULL_TREE)
4084 /* An automatic variable with an incomplete type: that is an error.
4085 Don't talk about array types here, since we took care of that
4086 message in grokdeclarator. */
4087 error ("storage size of %qD isn't known", decl);
4088 TREE_TYPE (decl) = error_mark_node;
4091 /* Keep this code around in case we later want to control debug info
4092 based on whether a type is "used". (jason 1999-11-11) */
4094 else if (!DECL_EXTERNAL (decl) && IS_AGGR_TYPE (ttype))
4095 /* Let debugger know it should output info for this type. */
4096 note_debug_info_needed (ttype);
4098 if (TREE_STATIC (decl) && DECL_CLASS_SCOPE_P (decl))
4099 note_debug_info_needed (DECL_CONTEXT (decl));
4102 if ((DECL_EXTERNAL (decl) || TREE_STATIC (decl))
4103 && DECL_SIZE (decl) != NULL_TREE
4104 && ! TREE_CONSTANT (DECL_SIZE (decl)))
4106 if (TREE_CODE (DECL_SIZE (decl)) == INTEGER_CST)
4107 constant_expression_warning (DECL_SIZE (decl));
4109 error ("storage size of %qD isn't constant", decl);
4112 if (TREE_STATIC (decl)
4113 && !DECL_ARTIFICIAL (decl)
4114 && current_function_decl
4115 && DECL_CONTEXT (decl) == current_function_decl)
4116 push_local_name (decl);
4119 /* If a local static variable is declared in an inline function, or if
4120 we have a weak definition, we must endeavor to create only one
4121 instance of the variable at link-time. */
4124 maybe_commonize_var (tree decl)
4126 /* Static data in a function with comdat linkage also has comdat
4128 if (TREE_STATIC (decl)
4129 /* Don't mess with __FUNCTION__. */
4130 && ! DECL_ARTIFICIAL (decl)
4131 && DECL_FUNCTION_SCOPE_P (decl)
4132 /* Unfortunately, import_export_decl has not always been called
4133 before the function is processed, so we cannot simply check
4135 && (DECL_COMDAT (DECL_CONTEXT (decl))
4136 || ((DECL_DECLARED_INLINE_P (DECL_CONTEXT (decl))
4137 || DECL_TEMPLATE_INSTANTIATION (DECL_CONTEXT (decl)))
4138 && TREE_PUBLIC (DECL_CONTEXT (decl)))))
4142 /* With weak symbols, we simply make the variable COMDAT;
4143 that will cause copies in multiple translations units to
4145 comdat_linkage (decl);
4149 if (DECL_INITIAL (decl) == NULL_TREE
4150 || DECL_INITIAL (decl) == error_mark_node)
4152 /* Without weak symbols, we can use COMMON to merge
4153 uninitialized variables. */
4154 TREE_PUBLIC (decl) = 1;
4155 DECL_COMMON (decl) = 1;
4159 /* While for initialized variables, we must use internal
4160 linkage -- which means that multiple copies will not
4162 TREE_PUBLIC (decl) = 0;
4163 DECL_COMMON (decl) = 0;
4164 cp_warning_at ("sorry: semantics of inline function static "
4165 "data %q#D are wrong (you'll wind up "
4166 "with multiple copies)", decl);
4167 warning ("%J you can work around this by removing "
4173 else if (DECL_LANG_SPECIFIC (decl) && DECL_COMDAT (decl))
4174 /* Set it up again; we might have set DECL_INITIAL since the last
4176 comdat_linkage (decl);
4179 /* Issue an error message if DECL is an uninitialized const variable. */
4182 check_for_uninitialized_const_var (tree decl)
4184 tree type = TREE_TYPE (decl);
4186 /* ``Unless explicitly declared extern, a const object does not have
4187 external linkage and must be initialized. ($8.4; $12.1)'' ARM
4189 if (TREE_CODE (decl) == VAR_DECL
4190 && TREE_CODE (type) != REFERENCE_TYPE
4191 && CP_TYPE_CONST_P (type)
4192 && !TYPE_NEEDS_CONSTRUCTING (type)
4193 && !DECL_INITIAL (decl))
4194 error ("uninitialized const %qD", decl);
4197 /* FIELD is a FIELD_DECL or NULL. In the former case, the value
4198 returned is the next FIELD_DECL (possibly FIELD itself) that can be
4199 initialized. If there are no more such fields, the return value
4203 next_initializable_field (tree field)
4206 && (TREE_CODE (field) != FIELD_DECL
4207 || (DECL_C_BIT_FIELD (field) && !DECL_NAME (field))
4208 || DECL_ARTIFICIAL (field)))
4209 field = TREE_CHAIN (field);
4214 /* Subroutine of reshape_init. Reshape the constructor for an array. INITP
4215 is the pointer to the old constructor list (to the CONSTRUCTOR_ELTS of
4216 the CONSTRUCTOR we are processing), while NEW_INIT is the CONSTRUCTOR we
4218 ELT_TYPE is the element type of the array. MAX_INDEX is an INTEGER_CST
4219 representing the size of the array minus one (the maximum index), or
4220 NULL_TREE if the array was declared without specifying the size. */
4223 reshape_init_array (tree elt_type, tree max_index,
4224 tree *initp, tree new_init)
4226 bool sized_array_p = (max_index != NULL_TREE);
4227 HOST_WIDE_INT max_index_cst = 0;
4228 HOST_WIDE_INT index;
4231 /* HWI is either 32bit or 64bit, so it must be enough to represent the
4233 max_index_cst = tree_low_cst (max_index, 1);
4235 /* Loop until there are no more initializers. */
4237 *initp && (!sized_array_p || index <= max_index_cst);
4241 tree designated_index;
4243 element_init = reshape_init (elt_type, initp);
4244 if (element_init == error_mark_node)
4246 TREE_CHAIN (element_init) = CONSTRUCTOR_ELTS (new_init);
4247 CONSTRUCTOR_ELTS (new_init) = element_init;
4248 designated_index = TREE_PURPOSE (element_init);
4249 if (designated_index)
4251 /* Handle array designated initializers (GNU extension). */
4252 if (TREE_CODE (designated_index) == IDENTIFIER_NODE)
4254 error ("name %qD used in a GNU-style designated "
4255 "initializer for an array", designated_index);
4256 TREE_PURPOSE (element_init) = NULL_TREE;
4260 gcc_assert (TREE_CODE (designated_index) == INTEGER_CST);
4262 && tree_int_cst_lt (max_index, designated_index))
4264 error ("Designated initializer %qE larger than array "
4265 "size", designated_index);
4266 TREE_PURPOSE (element_init) = NULL_TREE;
4269 index = tree_low_cst (designated_index, 1);
4277 /* Undo the brace-elision allowed by [dcl.init.aggr] in a
4278 brace-enclosed aggregate initializer.
4280 *INITP is one of a list of initializers describing a brace-enclosed
4281 initializer for an entity of the indicated aggregate TYPE. It may
4282 not presently match the shape of the TYPE; for example:
4284 struct S { int a; int b; };
4285 struct S a[] = { 1, 2, 3, 4 };
4287 Here *INITP will point to TREE_LIST of four elements, rather than a
4288 list of two elements, each itself a list of two elements. This
4289 routine transforms INIT from the former form into the latter. The
4290 revised initializer is returned. */
4293 reshape_init (tree type, tree *initp)
4297 tree old_init_value;
4299 bool brace_enclosed_p;
4302 old_init_value = (TREE_CODE (*initp) == TREE_LIST
4303 ? TREE_VALUE (*initp) : old_init);
4305 gcc_assert (old_init_value);
4307 /* If the initializer is brace-enclosed, pull initializers from the
4308 enclosed elements. Advance past the brace-enclosed initializer
4310 if (TREE_CODE (old_init_value) == CONSTRUCTOR
4311 && BRACE_ENCLOSED_INITIALIZER_P (old_init_value))
4313 *initp = TREE_CHAIN (old_init);
4314 TREE_CHAIN (old_init) = NULL_TREE;
4315 inits = CONSTRUCTOR_ELTS (old_init_value);
4317 brace_enclosed_p = true;
4322 brace_enclosed_p = false;
4325 /* A non-aggregate type is always initialized with a single
4327 if (!CP_AGGREGATE_TYPE_P (type))
4329 *initp = TREE_CHAIN (old_init);
4330 TREE_CHAIN (old_init) = NULL_TREE;
4331 /* It is invalid to initialize a non-aggregate type with a
4332 brace-enclosed initializer. */
4333 if (brace_enclosed_p)
4335 error ("brace-enclosed initializer used to initialize %qT",
4337 if (TREE_CODE (old_init) == TREE_LIST)
4338 TREE_VALUE (old_init) = error_mark_node;
4340 old_init = error_mark_node;
4348 All implicit type conversions (clause _conv_) are considered when
4349 initializing the aggregate member with an initializer from an
4350 initializer-list. If the initializer can initialize a member,
4351 the member is initialized. Otherwise, if the member is itself a
4352 non-empty subaggregate, brace elision is assumed and the
4353 initializer is considered for the initialization of the first
4354 member of the subaggregate. */
4355 if (!brace_enclosed_p
4356 && can_convert_arg (type, TREE_TYPE (old_init_value), old_init_value))
4358 *initp = TREE_CHAIN (old_init);
4359 TREE_CHAIN (old_init) = NULL_TREE;
4363 if (TREE_CODE (old_init_value) == STRING_CST
4364 && TREE_CODE (type) == ARRAY_TYPE
4365 && char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (type))))
4367 /* [dcl.init.string]
4369 A char array (whether plain char, signed char, or unsigned char)
4370 can be initialized by a string-literal (optionally enclosed in
4371 braces); a wchar_t array can be initialized by a wide
4372 string-literal (optionally enclosed in braces). */
4373 new_init = old_init;
4374 /* Move past the initializer. */
4375 *initp = TREE_CHAIN (old_init);
4376 TREE_CHAIN (old_init) = NULL_TREE;
4380 /* Build a CONSTRUCTOR to hold the contents of the aggregate. */
4381 new_init = build_constructor (NULL_TREE, NULL_TREE);
4383 if (CLASS_TYPE_P (type))
4387 field = next_initializable_field (TYPE_FIELDS (type));
4393 An initializer for an aggregate member that is an
4394 empty class shall have the form of an empty
4395 initializer-list {}. */
4396 if (!brace_enclosed_p)
4398 error ("initializer for %qT must be brace-enclosed", type);
4399 return error_mark_node;
4404 /* Loop through the initializable fields, gathering
4410 /* Handle designated initializers, as an extension. */
4411 if (TREE_PURPOSE (*initp))
4414 pedwarn ("ISO C++ does not allow designated initializers");
4415 field = lookup_field_1 (type, TREE_PURPOSE (*initp),
4416 /*want_type=*/false);
4417 if (!field || TREE_CODE (field) != FIELD_DECL)
4418 error ("%qT has no non-static data member named %qD",
4419 type, TREE_PURPOSE (*initp));
4424 field_init = reshape_init (TREE_TYPE (field), initp);
4425 if (field_init == error_mark_node)
4426 return error_mark_node;
4427 TREE_CHAIN (field_init) = CONSTRUCTOR_ELTS (new_init);
4428 CONSTRUCTOR_ELTS (new_init) = field_init;
4431 When a union is initialized with a brace-enclosed
4432 initializer, the braces shall only contain an
4433 initializer for the first member of the union. */
4434 if (TREE_CODE (type) == UNION_TYPE)
4436 field = next_initializable_field (TREE_CHAIN (field));
4440 else if (TREE_CODE (type) == ARRAY_TYPE
4441 || TREE_CODE (type) == VECTOR_TYPE)
4443 /* If the bound of the array is known, take no more initializers
4444 than are allowed. */
4445 tree max_index = NULL_TREE;
4446 if (TREE_CODE (type) == ARRAY_TYPE)
4448 if (TYPE_DOMAIN (type))
4449 max_index = array_type_nelts (type);
4453 /* For a vector, the representation type is a struct
4454 containing a single member which is an array of the
4455 appropriate size. */
4456 tree rtype = TYPE_DEBUG_REPRESENTATION_TYPE (type);
4457 if (rtype && TYPE_DOMAIN (TREE_TYPE (TYPE_FIELDS (rtype))))
4458 max_index = array_type_nelts (TREE_TYPE (TYPE_FIELDS
4462 if (!reshape_init_array (TREE_TYPE (type), max_index,
4464 return error_mark_node;
4469 /* The initializers were placed in reverse order in the
4471 CONSTRUCTOR_ELTS (new_init) = nreverse (CONSTRUCTOR_ELTS (new_init));
4473 if (TREE_CODE (old_init) == TREE_LIST)
4474 new_init = build_tree_list (TREE_PURPOSE (old_init), new_init);
4477 /* If this was a brace-enclosed initializer and all of the
4478 initializers were not used up, there is a problem. */
4479 if (brace_enclosed_p && *initp)
4480 error ("too many initializers for %qT", type);
4485 /* Verify INIT (the initializer for DECL), and record the
4486 initialization in DECL_INITIAL, if appropriate. CLEANUP is as for
4487 grok_reference_init.
4489 If the return value is non-NULL, it is an expression that must be
4490 evaluated dynamically to initialize DECL. */
4493 check_initializer (tree decl, tree init, int flags, tree *cleanup)
4495 tree type = TREE_TYPE (decl);
4496 tree init_code = NULL;
4498 /* If `start_decl' didn't like having an initialization, ignore it now. */
4499 if (init != NULL_TREE && DECL_INITIAL (decl) == NULL_TREE)
4502 /* If an initializer is present, DECL_INITIAL has been
4503 error_mark_node, to indicate that an as-of-yet unevaluated
4504 initialization will occur. From now on, DECL_INITIAL reflects
4505 the static initialization -- if any -- of DECL. */
4506 DECL_INITIAL (decl) = NULL_TREE;
4508 /* Things that are going to be initialized need to have complete
4510 TREE_TYPE (decl) = type = complete_type (TREE_TYPE (decl));
4512 if (type == error_mark_node)
4513 /* We will have already complained. */
4515 else if (init && COMPLETE_TYPE_P (type)
4516 && !TREE_CONSTANT (TYPE_SIZE (type)))
4518 error ("variable-sized object %qD may not be initialized", decl);
4521 else if (TREE_CODE (type) == ARRAY_TYPE
4522 && !COMPLETE_TYPE_P (complete_type (TREE_TYPE (type))))
4524 error ("elements of array %q#D have incomplete type", decl);
4527 else if (TREE_CODE (type) != ARRAY_TYPE && !COMPLETE_TYPE_P (type))
4529 error ("%qD has incomplete type", decl);
4530 TREE_TYPE (decl) = error_mark_node;
4534 if (TREE_CODE (decl) == CONST_DECL)
4536 gcc_assert (TREE_CODE (decl) != REFERENCE_TYPE);
4538 DECL_INITIAL (decl) = init;
4540 gcc_assert (init != NULL_TREE);
4543 else if (!DECL_EXTERNAL (decl) && TREE_CODE (type) == REFERENCE_TYPE)
4544 init = grok_reference_init (decl, type, init, cleanup);
4547 if (TREE_CODE (init) == CONSTRUCTOR
4548 && BRACE_ENCLOSED_INITIALIZER_P (init))
4550 /* [dcl.init] paragraph 13,
4551 If T is a scalar type, then a declaration of the form
4556 reshape_init will complain about the extra braces,
4557 and doesn't do anything useful in the case where TYPE is
4558 scalar, so just don't call it. */
4559 if (CP_AGGREGATE_TYPE_P (type))
4560 init = reshape_init (type, &init);
4562 if ((*targetm.vector_opaque_p) (type))
4564 error ("opaque vector types cannot be initialized");
4565 init = error_mark_node;
4569 /* If DECL has an array type without a specific bound, deduce the
4570 array size from the initializer. */
4571 maybe_deduce_size_from_array_init (decl, init);
4572 type = TREE_TYPE (decl);
4574 if (TYPE_HAS_CONSTRUCTOR (type) || TYPE_NEEDS_CONSTRUCTING (type))
4576 if (TREE_CODE (type) == ARRAY_TYPE)
4577 goto initialize_aggr;
4578 else if (TREE_CODE (init) == CONSTRUCTOR
4579 && BRACE_ENCLOSED_INITIALIZER_P (init))
4581 if (TYPE_NON_AGGREGATE_CLASS (type))
4583 error ("%qD must be initialized by constructor, "
4586 init = error_mark_node;
4589 goto dont_use_constructor;
4593 int saved_stmts_are_full_exprs_p;
4596 saved_stmts_are_full_exprs_p = 0;
4597 if (building_stmt_tree ())
4599 saved_stmts_are_full_exprs_p = stmts_are_full_exprs_p ();
4600 current_stmt_tree ()->stmts_are_full_exprs_p = 1;
4602 init = build_aggr_init (decl, init, flags);
4603 if (building_stmt_tree ())
4604 current_stmt_tree ()->stmts_are_full_exprs_p =
4605 saved_stmts_are_full_exprs_p;
4611 dont_use_constructor:
4612 if (TREE_CODE (init) != TREE_VEC)
4614 init_code = store_init_value (decl, init);
4615 if (pedantic && TREE_CODE (type) == ARRAY_TYPE
4616 && DECL_INITIAL (decl)
4617 && TREE_CODE (DECL_INITIAL (decl)) == STRING_CST
4618 && PAREN_STRING_LITERAL_P (DECL_INITIAL (decl)))
4619 warning ("array %qD initialized by parenthesized string literal %qE",
4620 decl, DECL_INITIAL (decl));
4625 else if (DECL_EXTERNAL (decl))
4627 else if (TYPE_P (type) && TYPE_NEEDS_CONSTRUCTING (type))
4628 goto initialize_aggr;
4629 else if (IS_AGGR_TYPE (type))
4631 tree core_type = strip_array_types (type);
4633 if (CLASSTYPE_READONLY_FIELDS_NEED_INIT (core_type))
4634 error ("structure %qD with uninitialized const members", decl);
4635 if (CLASSTYPE_REF_FIELDS_NEED_INIT (core_type))
4636 error ("structure %qD with uninitialized reference members", decl);
4638 check_for_uninitialized_const_var (decl);
4641 check_for_uninitialized_const_var (decl);
4643 if (init && init != error_mark_node)
4644 init_code = build2 (INIT_EXPR, type, decl, init);
4649 /* If DECL is not a local variable, give it RTL. */
4652 make_rtl_for_nonlocal_decl (tree decl, tree init, const char* asmspec)
4654 int toplev = toplevel_bindings_p ();
4657 /* Set the DECL_ASSEMBLER_NAME for the object. */
4660 /* The `register' keyword, when used together with an
4661 asm-specification, indicates that the variable should be
4662 placed in a particular register. */
4663 if (TREE_CODE (decl) == VAR_DECL && DECL_REGISTER (decl))
4665 change_decl_assembler_name (decl, get_identifier (asmspec));
4666 DECL_HARD_REGISTER (decl) = 1;
4670 if (TREE_CODE (decl) == FUNCTION_DECL
4671 && DECL_BUILT_IN_CLASS (decl) == BUILT_IN_NORMAL)
4672 set_builtin_user_assembler_name (decl, asmspec);
4673 set_user_assembler_name (decl, asmspec);
4677 /* Handle non-variables up front. */
4678 if (TREE_CODE (decl) != VAR_DECL)
4680 rest_of_decl_compilation (decl, toplev, at_eof);
4684 /* If we see a class member here, it should be a static data
4686 if (DECL_LANG_SPECIFIC (decl) && DECL_IN_AGGR_P (decl))
4688 gcc_assert (TREE_STATIC (decl));
4689 /* An in-class declaration of a static data member should be
4690 external; it is only a declaration, and not a definition. */
4691 if (init == NULL_TREE)
4692 gcc_assert (DECL_EXTERNAL (decl));
4695 /* We don't create any RTL for local variables. */
4696 if (DECL_FUNCTION_SCOPE_P (decl) && !TREE_STATIC (decl))
4699 /* We defer emission of local statics until the corresponding
4700 DECL_EXPR is expanded. */
4701 defer_p = DECL_FUNCTION_SCOPE_P (decl) || DECL_VIRTUAL_P (decl);
4703 /* We try to defer namespace-scope static constants so that they are
4704 not emitted into the object file unnecessarily. */
4705 if (!DECL_VIRTUAL_P (decl)
4706 && TREE_READONLY (decl)
4707 && DECL_INITIAL (decl) != NULL_TREE
4708 && DECL_INITIAL (decl) != error_mark_node
4709 && ! EMPTY_CONSTRUCTOR_P (DECL_INITIAL (decl))
4711 && !TREE_PUBLIC (decl))
4713 /* Fool with the linkage of static consts according to #pragma
4715 struct c_fileinfo *finfo = get_fileinfo (lbasename (input_filename));
4716 if (!finfo->interface_unknown && !TREE_PUBLIC (decl))
4718 TREE_PUBLIC (decl) = 1;
4719 DECL_EXTERNAL (decl) = finfo->interface_only;
4724 /* Likewise for template instantiations. */
4725 else if (DECL_LANG_SPECIFIC (decl)
4726 && DECL_IMPLICIT_INSTANTIATION (decl))
4729 /* If we're not deferring, go ahead and assemble the variable. */
4731 rest_of_decl_compilation (decl, toplev, at_eof);
4734 /* Generate code to initialize DECL (a local variable). */
4737 initialize_local_var (tree decl, tree init)
4739 tree type = TREE_TYPE (decl);
4742 gcc_assert (TREE_CODE (decl) == VAR_DECL
4743 || TREE_CODE (decl) == RESULT_DECL);
4744 gcc_assert (!TREE_STATIC (decl));
4746 if (DECL_SIZE (decl) == NULL_TREE)
4748 /* If we used it already as memory, it must stay in memory. */
4749 DECL_INITIAL (decl) = NULL_TREE;
4750 TREE_ADDRESSABLE (decl) = TREE_USED (decl);
4753 if (DECL_SIZE (decl) && type != error_mark_node)
4757 /* Compute and store the initial value. */
4758 already_used = TREE_USED (decl) || TREE_USED (type);
4760 /* Perform the initialization. */
4763 int saved_stmts_are_full_exprs_p;
4765 gcc_assert (building_stmt_tree ());
4766 saved_stmts_are_full_exprs_p = stmts_are_full_exprs_p ();
4767 current_stmt_tree ()->stmts_are_full_exprs_p = 1;
4768 finish_expr_stmt (init);
4769 current_stmt_tree ()->stmts_are_full_exprs_p =
4770 saved_stmts_are_full_exprs_p;
4773 /* Set this to 0 so we can tell whether an aggregate which was
4774 initialized was ever used. Don't do this if it has a
4775 destructor, so we don't complain about the 'resource
4776 allocation is initialization' idiom. Now set
4777 attribute((unused)) on types so decls of that type will be
4778 marked used. (see TREE_USED, above.) */
4779 if (TYPE_NEEDS_CONSTRUCTING (type)
4781 && TYPE_HAS_TRIVIAL_DESTRUCTOR (type)
4782 && DECL_NAME (decl))
4783 TREE_USED (decl) = 0;
4784 else if (already_used)
4785 TREE_USED (decl) = 1;
4788 /* Generate a cleanup, if necessary. */
4789 cleanup = cxx_maybe_build_cleanup (decl);
4790 if (DECL_SIZE (decl) && cleanup)
4791 finish_decl_cleanup (decl, cleanup);
4794 /* DECL is a VAR_DECL for a compiler-generated variable with static
4795 storage duration (like a virtual table) whose initializer is a
4796 compile-time constant. Initialize the variable and provide it to
4800 initialize_artificial_var (tree decl, tree init)
4802 DECL_INITIAL (decl) = build_constructor (NULL_TREE, init);
4803 DECL_INITIALIZED_P (decl) = 1;
4804 determine_visibility (decl);
4805 layout_var_decl (decl);
4806 maybe_commonize_var (decl);
4807 make_rtl_for_nonlocal_decl (decl, init, /*asmspec=*/NULL);
4810 /* Finish processing of a declaration;
4811 install its line number and initial value.
4812 If the length of an array type is not known before,
4813 it must be determined now, from the initial value, or it is an error.
4815 INIT holds the value of an initializer that should be allowed to escape
4818 FLAGS is LOOKUP_ONLYCONVERTING if the = init syntax was used, else 0
4819 if the (init) syntax was used. */
4822 cp_finish_decl (tree decl, tree init, tree asmspec_tree, int flags)
4825 tree ttype = NULL_TREE;
4827 const char *asmspec = NULL;
4828 int was_readonly = 0;
4829 bool var_definition_p = false;
4831 if (decl == error_mark_node)
4836 error ("assignment (not initialization) in declaration");
4840 gcc_assert (TREE_CODE (decl) != RESULT_DECL);
4842 /* Assume no cleanup is required. */
4843 cleanup = NULL_TREE;
4845 /* If a name was specified, get the string. */
4846 if (global_scope_p (current_binding_level))
4847 asmspec_tree = maybe_apply_renaming_pragma (decl, asmspec_tree);
4849 asmspec = TREE_STRING_POINTER (asmspec_tree);
4851 if (init && TREE_CODE (init) == NAMESPACE_DECL)
4853 error ("cannot initialize %qD to namespace %qD", decl, init);
4857 if (current_class_type
4858 && CP_DECL_CONTEXT (decl) == current_class_type
4859 && TYPE_BEING_DEFINED (current_class_type)
4860 && (DECL_INITIAL (decl) || init))
4861 DECL_INITIALIZED_IN_CLASS_P (decl) = 1;
4863 type = TREE_TYPE (decl);
4865 if (type == error_mark_node)
4868 if (TYPE_HAS_MUTABLE_P (type))
4869 TREE_READONLY (decl) = 0;
4871 if (processing_template_decl)
4873 /* Add this declaration to the statement-tree. */
4874 if (at_function_scope_p ())
4875 add_decl_expr (decl);
4877 if (init && DECL_INITIAL (decl))
4878 DECL_INITIAL (decl) = init;
4879 if (TREE_CODE (decl) == VAR_DECL
4880 && !DECL_PRETTY_FUNCTION_P (decl)
4881 && !dependent_type_p (TREE_TYPE (decl)))
4882 maybe_deduce_size_from_array_init (decl, init);
4887 /* Parameters are handled by store_parm_decls, not cp_finish_decl. */
4888 gcc_assert (TREE_CODE (decl) != PARM_DECL);
4890 /* Take care of TYPE_DECLs up front. */
4891 if (TREE_CODE (decl) == TYPE_DECL)
4893 if (type != error_mark_node
4894 && IS_AGGR_TYPE (type) && DECL_NAME (decl))
4896 if (TREE_TYPE (DECL_NAME (decl)) && TREE_TYPE (decl) != type)
4897 warning ("shadowing previous type declaration of %q#D", decl);
4898 set_identifier_type_value (DECL_NAME (decl), decl);
4901 /* If we have installed this as the canonical typedef for this
4902 type, and that type has not been defined yet, delay emitting
4903 the debug information for it, as we will emit it later. */
4904 if (TYPE_MAIN_DECL (TREE_TYPE (decl)) == decl
4905 && !COMPLETE_TYPE_P (TREE_TYPE (decl)))
4906 TYPE_DECL_SUPPRESS_DEBUG (decl) = 1;
4908 rest_of_decl_compilation (decl, DECL_CONTEXT (decl) == NULL_TREE,
4913 if (TREE_CODE (decl) != FUNCTION_DECL)
4914 ttype = target_type (type);
4917 /* Currently, GNU C++ puts constants in text space, making them
4918 impossible to initialize. In the future, one would hope for
4919 an operating system which understood the difference between
4920 initialization and the running of a program. */
4921 if (! DECL_EXTERNAL (decl) && TREE_READONLY (decl))
4924 if (TYPE_NEEDS_CONSTRUCTING (type)
4925 || TREE_CODE (type) == REFERENCE_TYPE)
4926 TREE_READONLY (decl) = 0;
4929 if (TREE_CODE (decl) == VAR_DECL)
4931 /* Only PODs can have thread-local storage. Other types may require
4932 various kinds of non-trivial initialization. */
4933 if (DECL_THREAD_LOCAL (decl) && !pod_type_p (TREE_TYPE (decl)))
4934 error ("%qD cannot be thread-local because it has non-POD type %qT",
4935 decl, TREE_TYPE (decl));
4936 /* Convert the initializer to the type of DECL, if we have not
4937 already initialized DECL. */
4938 if (!DECL_INITIALIZED_P (decl)
4939 /* If !DECL_EXTERNAL then DECL is being defined. In the
4940 case of a static data member initialized inside the
4941 class-specifier, there can be an initializer even if DECL
4942 is *not* defined. */
4943 && (!DECL_EXTERNAL (decl) || init))
4945 init = check_initializer (decl, init, flags, &cleanup);
4946 /* Thread-local storage cannot be dynamically initialized. */
4947 if (DECL_THREAD_LOCAL (decl) && init)
4949 error ("%qD is thread-local and so cannot be dynamically "
4950 "initialized", decl);
4957 The memory occupied by any object of static storage
4958 duration is zero-initialized at program startup before
4959 any other initialization takes place.
4961 We cannot create an appropriate initializer until after
4962 the type of DECL is finalized. If DECL_INITIAL is set,
4963 then the DECL is statically initialized, and any
4964 necessary zero-initialization has already been performed. */
4965 if (TREE_STATIC (decl) && !DECL_INITIAL (decl))
4966 DECL_INITIAL (decl) = build_zero_init (TREE_TYPE (decl),
4967 /*nelts=*/NULL_TREE,
4968 /*static_storage_p=*/true);
4969 /* Remember that the initialization for this variable has
4971 DECL_INITIALIZED_P (decl) = 1;
4972 /* This declaration is the definition of this variable,
4973 unless we are initializing a static data member within
4974 the class specifier. */
4975 if (!DECL_EXTERNAL (decl))
4976 var_definition_p = true;
4977 /* The variable is being defined, so determine its
4979 determine_visibility (decl);
4981 /* If the variable has an array type, lay out the type, even if
4982 there is no initializer. It is valid to index through the
4983 array, and we must get TYPE_ALIGN set correctly on the array
4985 else if (TREE_CODE (type) == ARRAY_TYPE)
4989 /* Add this declaration to the statement-tree. This needs to happen
4990 after the call to check_initializer so that the DECL_EXPR for a
4991 reference temp is added before the DECL_EXPR for the reference itself. */
4992 if (at_function_scope_p ())
4993 add_decl_expr (decl);
4995 if (TREE_CODE (decl) == VAR_DECL)
4996 layout_var_decl (decl);
4998 /* Output the assembler code and/or RTL code for variables and functions,
4999 unless the type is an undefined structure or union.
5000 If not, it will get done when the type is completed. */
5001 if (TREE_CODE (decl) == VAR_DECL || TREE_CODE (decl) == FUNCTION_DECL)
5003 if (TREE_CODE (decl) == VAR_DECL)
5004 maybe_commonize_var (decl);
5006 make_rtl_for_nonlocal_decl (decl, init, asmspec);
5008 /* Check for abstractness of the type. Notice that there is no
5009 need to strip array types here since the check for those types
5010 is already done within create_array_type_for_decl. */
5011 if (TREE_CODE (type) == FUNCTION_TYPE
5012 || TREE_CODE (type) == METHOD_TYPE)
5013 abstract_virtuals_error (decl, TREE_TYPE (type));
5015 abstract_virtuals_error (decl, type);
5017 if (TREE_CODE (decl) == FUNCTION_DECL
5018 || TREE_TYPE (decl) == error_mark_node)
5019 /* No initialization required. */
5021 else if (DECL_EXTERNAL (decl)
5022 && ! (DECL_LANG_SPECIFIC (decl)
5023 && DECL_NOT_REALLY_EXTERN (decl)))
5026 DECL_INITIAL (decl) = init;
5030 /* A variable definition. */
5031 if (DECL_FUNCTION_SCOPE_P (decl))
5033 /* Initialize the local variable. */
5034 if (processing_template_decl)
5036 if (init || DECL_INITIAL (decl) == error_mark_node)
5037 DECL_INITIAL (decl) = init;
5039 else if (!TREE_STATIC (decl))
5040 initialize_local_var (decl, init);
5043 /* If a variable is defined, and then a subsequent
5044 definition with external linkage is encountered, we will
5045 get here twice for the same variable. We want to avoid
5046 calling expand_static_init more than once. For variables
5047 that are not static data members, we can call
5048 expand_static_init only when we actually process the
5049 initializer. It is not legal to redeclare a static data
5050 member, so this issue does not arise in that case. */
5051 if (var_definition_p && TREE_STATIC (decl))
5052 expand_static_init (decl, init);
5056 /* If a CLEANUP_STMT was created to destroy a temporary bound to a
5057 reference, insert it in the statement-tree now. */
5059 push_cleanup (decl, cleanup, false);
5064 TREE_READONLY (decl) = 1;
5066 /* If this was marked 'used', be sure it will be output. */
5067 if (lookup_attribute ("used", DECL_ATTRIBUTES (decl)))
5068 mark_decl_referenced (decl);
5071 /* This is here for a midend callback from c-common.c. */
5074 finish_decl (tree decl, tree init, tree asmspec_tree)
5076 cp_finish_decl (decl, init, asmspec_tree, 0);
5079 /* Returns a declaration for a VAR_DECL as if:
5081 extern "C" TYPE NAME;
5083 had been seen. Used to create compiler-generated global
5087 declare_global_var (tree name, tree type)
5091 push_to_top_level ();
5092 decl = build_decl (VAR_DECL, name, type);
5093 TREE_PUBLIC (decl) = 1;
5094 DECL_EXTERNAL (decl) = 1;
5095 DECL_ARTIFICIAL (decl) = 1;
5096 /* If the user has explicitly declared this variable (perhaps
5097 because the code we are compiling is part of a low-level runtime
5098 library), then it is possible that our declaration will be merged
5099 with theirs by pushdecl. */
5100 decl = pushdecl (decl);
5101 cp_finish_decl (decl, NULL_TREE, NULL_TREE, 0);
5102 pop_from_top_level ();
5107 /* Returns a pointer to the `atexit' function. Note that if
5108 FLAG_USE_CXA_ATEXIT is nonzero, then this will actually be the new
5109 `__cxa_atexit' function specified in the IA64 C++ ABI. */
5112 get_atexit_node (void)
5123 if (flag_use_cxa_atexit)
5125 /* The declaration for `__cxa_atexit' is:
5127 int __cxa_atexit (void (*)(void *), void *, void *)
5129 We build up the argument types and then then function type
5132 /* First, build the pointer-to-function type for the first
5134 arg_types = tree_cons (NULL_TREE, ptr_type_node, void_list_node);
5135 fn_type = build_function_type (void_type_node, arg_types);
5136 fn_ptr_type = build_pointer_type (fn_type);
5137 /* Then, build the rest of the argument types. */
5138 arg_types = tree_cons (NULL_TREE, ptr_type_node, void_list_node);
5139 arg_types = tree_cons (NULL_TREE, ptr_type_node, arg_types);
5140 arg_types = tree_cons (NULL_TREE, fn_ptr_type, arg_types);
5141 /* And the final __cxa_atexit type. */
5142 fn_type = build_function_type (integer_type_node, arg_types);
5143 fn_ptr_type = build_pointer_type (fn_type);
5144 name = "__cxa_atexit";
5148 /* The declaration for `atexit' is:
5150 int atexit (void (*)());
5152 We build up the argument types and then then function type
5154 fn_type = build_function_type (void_type_node, void_list_node);
5155 fn_ptr_type = build_pointer_type (fn_type);
5156 arg_types = tree_cons (NULL_TREE, fn_ptr_type, void_list_node);
5157 /* Build the final atexit type. */
5158 fn_type = build_function_type (integer_type_node, arg_types);
5162 /* Now, build the function declaration. */
5163 push_lang_context (lang_name_c);
5164 atexit_fndecl = build_library_fn_ptr (name, fn_type);
5165 mark_used (atexit_fndecl);
5166 pop_lang_context ();
5167 atexit_node = decay_conversion (atexit_fndecl);
5172 /* Returns the __dso_handle VAR_DECL. */
5175 get_dso_handle_node (void)
5177 if (dso_handle_node)
5178 return dso_handle_node;
5180 /* Declare the variable. */
5181 dso_handle_node = declare_global_var (get_identifier ("__dso_handle"),
5184 return dso_handle_node;
5187 /* Begin a new function with internal linkage whose job will be simply
5188 to destroy some particular variable. */
5190 static GTY(()) int start_cleanup_cnt;
5193 start_cleanup_fn (void)
5200 push_to_top_level ();
5202 /* No need to mangle this. */
5203 push_lang_context (lang_name_c);
5205 /* Build the parameter-types. */
5206 parmtypes = void_list_node;
5207 /* Functions passed to __cxa_atexit take an additional parameter.
5208 We'll just ignore it. After we implement the new calling
5209 convention for destructors, we can eliminate the use of
5210 additional cleanup functions entirely in the -fnew-abi case. */
5211 if (flag_use_cxa_atexit)
5212 parmtypes = tree_cons (NULL_TREE, ptr_type_node, parmtypes);
5213 /* Build the function type itself. */
5214 fntype = build_function_type (void_type_node, parmtypes);
5215 /* Build the name of the function. */
5216 sprintf (name, "__tcf_%d", start_cleanup_cnt++);
5217 /* Build the function declaration. */
5218 fndecl = build_lang_decl (FUNCTION_DECL, get_identifier (name), fntype);
5219 /* It's a function with internal linkage, generated by the
5221 TREE_PUBLIC (fndecl) = 0;
5222 DECL_ARTIFICIAL (fndecl) = 1;
5223 /* Make the function `inline' so that it is only emitted if it is
5224 actually needed. It is unlikely that it will be inlined, since
5225 it is only called via a function pointer, but we avoid unnecessary
5226 emissions this way. */
5227 DECL_INLINE (fndecl) = 1;
5228 DECL_DECLARED_INLINE_P (fndecl) = 1;
5229 DECL_INTERFACE_KNOWN (fndecl) = 1;
5230 /* Build the parameter. */
5231 if (flag_use_cxa_atexit)
5235 parmdecl = cp_build_parm_decl (NULL_TREE, ptr_type_node);
5236 DECL_CONTEXT (parmdecl) = fndecl;
5237 TREE_USED (parmdecl) = 1;
5238 DECL_ARGUMENTS (fndecl) = parmdecl;
5242 start_preparsed_function (fndecl, NULL_TREE, SF_PRE_PARSED);
5244 pop_lang_context ();
5246 return current_function_decl;
5249 /* Finish the cleanup function begun by start_cleanup_fn. */
5252 end_cleanup_fn (void)
5254 expand_or_defer_fn (finish_function (0));
5256 pop_from_top_level ();
5259 /* Generate code to handle the destruction of DECL, an object with
5260 static storage duration. */
5263 register_dtor_fn (tree decl)
5270 if (TYPE_HAS_TRIVIAL_DESTRUCTOR (TREE_TYPE (decl)))
5271 return void_zero_node;
5273 /* Call build_cleanup before we enter the anonymous function so that
5274 any access checks will be done relative to the current scope,
5275 rather than the scope of the anonymous function. */
5276 build_cleanup (decl);
5278 /* Now start the function. */
5279 cleanup = start_cleanup_fn ();
5281 /* Now, recompute the cleanup. It may contain SAVE_EXPRs that refer
5282 to the original function, rather than the anonymous one. That
5283 will make the back-end think that nested functions are in use,
5284 which causes confusion. */
5286 push_deferring_access_checks (dk_no_check);
5287 fcall = build_cleanup (decl);
5288 pop_deferring_access_checks ();
5290 /* Create the body of the anonymous function. */
5291 compound_stmt = begin_compound_stmt (BCS_FN_BODY);
5292 finish_expr_stmt (fcall);
5293 finish_compound_stmt (compound_stmt);
5296 /* Call atexit with the cleanup function. */
5297 cxx_mark_addressable (cleanup);
5298 mark_used (cleanup);
5299 cleanup = build_unary_op (ADDR_EXPR, cleanup, 0);
5300 if (flag_use_cxa_atexit)
5302 args = tree_cons (NULL_TREE,
5303 build_unary_op (ADDR_EXPR, get_dso_handle_node (), 0),
5305 args = tree_cons (NULL_TREE, null_pointer_node, args);
5306 args = tree_cons (NULL_TREE, cleanup, args);
5309 args = tree_cons (NULL_TREE, cleanup, NULL_TREE);
5310 return build_function_call (get_atexit_node (), args);
5313 /* DECL is a VAR_DECL with static storage duration. INIT, if present,
5314 is its initializer. Generate code to handle the construction
5315 and destruction of DECL. */
5318 expand_static_init (tree decl, tree init)
5320 gcc_assert (TREE_CODE (decl) == VAR_DECL);
5321 gcc_assert (TREE_STATIC (decl));
5323 /* Some variables require no initialization. */
5325 && !TYPE_NEEDS_CONSTRUCTING (TREE_TYPE (decl))
5326 && TYPE_HAS_TRIVIAL_DESTRUCTOR (TREE_TYPE (decl)))
5329 if (DECL_FUNCTION_SCOPE_P (decl))
5331 /* Emit code to perform this initialization but once. */
5332 tree if_stmt = NULL_TREE, inner_if_stmt = NULL_TREE;
5333 tree then_clause = NULL_TREE, inner_then_clause = NULL_TREE;
5334 tree guard, guard_addr, guard_addr_list;
5335 tree acquire_fn, release_fn, abort_fn;
5338 /* Emit code to perform this initialization but once. This code
5341 static <type> guard;
5342 if (!guard.first_byte) {
5343 if (__cxa_guard_acquire (&guard)) {
5346 // Do initialization.
5347 flag = true; __cxa_guard_release (&guard);
5348 // Register variable for destruction at end of program.
5350 if (!flag) __cxa_guard_abort (&guard);
5354 Note that the `flag' variable is only set to 1 *after* the
5355 initialization is complete. This ensures that an exception,
5356 thrown during the construction, will cause the variable to
5357 reinitialized when we pass through this code again, as per:
5361 If the initialization exits by throwing an exception, the
5362 initialization is not complete, so it will be tried again
5363 the next time control enters the declaration.
5365 This process should be thread-safe, too; multiple threads
5366 should not be able to initialize the variable more than
5369 /* Create the guard variable. */
5370 guard = get_guard (decl);
5372 /* This optimization isn't safe on targets with relaxed memory
5373 consistency. On such targets we force synchronization in
5374 __cxa_guard_acquire. */
5375 if (!targetm.relaxed_ordering || !flag_threadsafe_statics)
5377 /* Begin the conditional initialization. */
5378 if_stmt = begin_if_stmt ();
5379 finish_if_stmt_cond (get_guard_cond (guard), if_stmt);
5380 then_clause = begin_compound_stmt (BCS_NO_SCOPE);
5383 if (flag_threadsafe_statics)
5385 guard_addr = build_address (guard);
5386 guard_addr_list = build_tree_list (NULL_TREE, guard_addr);
5388 acquire_fn = get_identifier ("__cxa_guard_acquire");
5389 release_fn = get_identifier ("__cxa_guard_release");
5390 abort_fn = get_identifier ("__cxa_guard_abort");
5391 if (!get_global_value_if_present (acquire_fn, &acquire_fn))
5393 tree argtypes = tree_cons (NULL_TREE, TREE_TYPE (guard_addr),
5395 tree vfntype = build_function_type (void_type_node, argtypes);
5396 acquire_fn = push_library_fn
5397 (acquire_fn, build_function_type (integer_type_node, argtypes));
5398 release_fn = push_library_fn (release_fn, vfntype);
5399 abort_fn = push_library_fn (abort_fn, vfntype);
5403 release_fn = identifier_global_value (release_fn);
5404 abort_fn = identifier_global_value (abort_fn);
5407 inner_if_stmt = begin_if_stmt ();
5408 finish_if_stmt_cond (build_call (acquire_fn, guard_addr_list),
5411 inner_then_clause = begin_compound_stmt (BCS_NO_SCOPE);
5412 begin = get_target_expr (boolean_false_node);
5413 flag = TARGET_EXPR_SLOT (begin);
5415 TARGET_EXPR_CLEANUP (begin)
5416 = build (COND_EXPR, void_type_node, flag,
5418 build_call (abort_fn, guard_addr_list));
5419 CLEANUP_EH_ONLY (begin) = 1;
5421 /* Do the initialization itself. */
5422 init = add_stmt_to_compound (begin, init);
5423 init = add_stmt_to_compound
5424 (init, build (MODIFY_EXPR, void_type_node, flag, boolean_true_node));
5425 init = add_stmt_to_compound
5426 (init, build_call (release_fn, guard_addr_list));
5429 init = add_stmt_to_compound (init, set_guard (guard));
5431 /* Use atexit to register a function for destroying this static
5433 init = add_stmt_to_compound (init, register_dtor_fn (decl));
5435 finish_expr_stmt (init);
5437 if (flag_threadsafe_statics)
5439 finish_compound_stmt (inner_then_clause);
5440 finish_then_clause (inner_if_stmt);
5441 finish_if_stmt (inner_if_stmt);
5444 if (!targetm.relaxed_ordering || !flag_threadsafe_statics)
5446 finish_compound_stmt (then_clause);
5447 finish_then_clause (if_stmt);
5448 finish_if_stmt (if_stmt);
5452 static_aggregates = tree_cons (init, decl, static_aggregates);
5456 /* Make TYPE a complete type based on INITIAL_VALUE.
5457 Return 0 if successful, 1 if INITIAL_VALUE can't be deciphered,
5458 2 if there was no information (in which case assume 0 if DO_DEFAULT). */
5461 complete_array_type (tree type, tree initial_value, int do_default)
5463 tree maxindex = NULL_TREE;
5468 /* An array of character type can be initialized from a
5469 brace-enclosed string constant. */
5470 if (char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (type)))
5471 && TREE_CODE (initial_value) == CONSTRUCTOR
5472 && CONSTRUCTOR_ELTS (initial_value)
5473 && (TREE_CODE (TREE_VALUE (CONSTRUCTOR_ELTS (initial_value)))
5475 && TREE_CHAIN (CONSTRUCTOR_ELTS (initial_value)) == NULL_TREE)
5476 initial_value = TREE_VALUE (CONSTRUCTOR_ELTS (initial_value));
5478 /* Note MAXINDEX is really the maximum index, one less than the
5480 if (TREE_CODE (initial_value) == STRING_CST)
5483 = int_size_in_bytes (TREE_TYPE (TREE_TYPE (initial_value)));
5484 maxindex = build_int_cst (NULL_TREE,
5485 (TREE_STRING_LENGTH (initial_value)
5488 else if (TREE_CODE (initial_value) == CONSTRUCTOR)
5490 tree elts = CONSTRUCTOR_ELTS (initial_value);
5492 maxindex = ssize_int (-1);
5493 for (; elts; elts = TREE_CHAIN (elts))
5495 if (TREE_PURPOSE (elts))
5496 maxindex = TREE_PURPOSE (elts);
5498 maxindex = size_binop (PLUS_EXPR, maxindex, ssize_int (1));
5503 /* Make an error message unless that happened already. */
5504 if (initial_value != error_mark_node)
5507 initial_value = NULL_TREE;
5509 /* Prevent further error messages. */
5510 maxindex = build_int_cst (NULL_TREE, 0);
5517 maxindex = build_int_cst (NULL_TREE, 0);
5527 domain = build_index_type (maxindex);
5528 TYPE_DOMAIN (type) = domain;
5531 itype = TREE_TYPE (initial_value);
5534 if (itype && !TYPE_DOMAIN (itype))
5535 TYPE_DOMAIN (itype) = domain;
5536 /* The type of the main variant should never be used for arrays
5537 of different sizes. It should only ever be completed with the
5538 size of the array. */
5539 if (! TYPE_DOMAIN (TYPE_MAIN_VARIANT (type)))
5540 TYPE_DOMAIN (TYPE_MAIN_VARIANT (type)) = domain;
5542 elt_type = TREE_TYPE (type);
5543 TYPE_NEEDS_CONSTRUCTING (type)
5544 = TYPE_NEEDS_CONSTRUCTING (TYPE_MAIN_VARIANT (elt_type));
5545 TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type)
5546 = TYPE_HAS_NONTRIVIAL_DESTRUCTOR (TYPE_MAIN_VARIANT (elt_type));
5549 /* Lay out the type now that we can get the real answer. */
5556 /* Return zero if something is declared to be a member of type
5557 CTYPE when in the context of CUR_TYPE. STRING is the error
5558 message to print in that case. Otherwise, quietly return 1. */
5561 member_function_or_else (tree ctype, tree cur_type, enum overload_flags flags)
5563 if (ctype && ctype != cur_type)
5565 if (flags == DTOR_FLAG)
5566 error ("destructor for alien class %qT cannot be a member", ctype);
5568 error ("constructor for alien class %qT cannot be a member", ctype);
5574 /* Subroutine of `grokdeclarator'. */
5576 /* Generate errors possibly applicable for a given set of specifiers.
5577 This is for ARM $7.1.2. */
5580 bad_specifiers (tree object,
5589 error ("%qD declared as a %<virtual%> %s", object, type);
5591 error ("%qD declared as an %<inline%> %s", object, type);
5593 error ("%<const%> and %<volatile%> function specifiers on "
5594 "%qD invalid in %s declaration",
5597 cp_error_at ("%qD declared as a friend", object);
5599 && (TREE_CODE (object) == TYPE_DECL
5600 || (!TYPE_PTRFN_P (TREE_TYPE (object))
5601 && !TYPE_REFFN_P (TREE_TYPE (object))
5602 && !TYPE_PTRMEMFUNC_P (TREE_TYPE (object)))))
5603 cp_error_at ("%qD declared with an exception specification", object);
5606 /* CTYPE is class type, or null if non-class.
5607 TYPE is type this FUNCTION_DECL should have, either FUNCTION_TYPE
5609 DECLARATOR is the function's name.
5610 PARMS is a chain of PARM_DECLs for the function.
5611 VIRTUALP is truthvalue of whether the function is virtual or not.
5612 FLAGS are to be passed through to `grokclassfn'.
5613 QUALS are qualifiers indicating whether the function is `const'
5615 RAISES is a list of exceptions that this function can raise.
5616 CHECK is 1 if we must find this method in CTYPE, 0 if we should
5617 not look, and -1 if we should not call `grokclassfn' at all.
5619 Returns `NULL_TREE' if something goes wrong, after issuing
5620 applicable error messages. */
5623 grokfndecl (tree ctype,
5627 tree orig_declarator,
5629 enum overload_flags flags,
5642 int staticp = ctype && TREE_CODE (type) == FUNCTION_TYPE;
5643 int has_default_arg = 0;
5647 type = build_exception_variant (type, raises);
5649 decl = build_lang_decl (FUNCTION_DECL, declarator, type);
5650 DECL_ARGUMENTS (decl) = parms;
5651 /* Propagate volatile out from type to decl. */
5652 if (TYPE_VOLATILE (type))
5653 TREE_THIS_VOLATILE (decl) = 1;
5655 /* If this decl has namespace scope, set that up. */
5657 set_decl_namespace (decl, in_namespace, friendp);
5659 DECL_CONTEXT (decl) = FROB_CONTEXT (current_namespace);
5661 /* `main' and builtins have implicit 'C' linkage. */
5662 if ((MAIN_NAME_P (declarator)
5663 || (IDENTIFIER_LENGTH (declarator) > 10
5664 && IDENTIFIER_POINTER (declarator)[0] == '_'
5665 && IDENTIFIER_POINTER (declarator)[1] == '_'
5666 && strncmp (IDENTIFIER_POINTER (declarator)+2, "builtin_", 8) == 0))
5667 && current_lang_name == lang_name_cplusplus
5668 && ctype == NULL_TREE
5669 /* NULL_TREE means global namespace. */
5670 && DECL_CONTEXT (decl) == NULL_TREE)
5671 SET_DECL_LANGUAGE (decl, lang_c);
5673 /* Should probably propagate const out from type to decl I bet (mrs). */
5676 DECL_STATIC_FUNCTION_P (decl) = 1;
5677 DECL_CONTEXT (decl) = ctype;
5681 DECL_CONTEXT (decl) = ctype;
5683 if (ctype == NULL_TREE && DECL_MAIN_P (decl))
5685 if (processing_template_decl)
5686 error ("cannot declare %<::main%> to be a template");
5688 error ("cannot declare %<::main%> to be inline");
5690 error ("cannot declare %<::main%> to be static");
5691 if (!same_type_p (TREE_TYPE (TREE_TYPE (decl)),
5694 error ("%<::main%> must return %<int%>");
5695 TREE_TYPE (TREE_TYPE (decl)) = integer_type_node;
5701 /* Members of anonymous types and local classes have no linkage; make
5702 them internal. If a typedef is made later, this will be changed. */
5703 if (ctype && (TYPE_ANONYMOUS_P (ctype)
5704 || decl_function_context (TYPE_MAIN_DECL (ctype))))
5709 /* [basic.link]: A name with no linkage (notably, the name of a class
5710 or enumeration declared in a local scope) shall not be used to
5711 declare an entity with linkage.
5713 Only check this for public decls for now. See core 319, 389. */
5714 t = no_linkage_check (TREE_TYPE (decl),
5715 /*relaxed_p=*/false);
5718 if (TYPE_ANONYMOUS_P (t))
5720 if (DECL_EXTERN_C_P (decl))
5721 /* Allow this; it's pretty common in C. */;
5724 pedwarn ("non-local function %q#D uses anonymous type",
5726 if (DECL_ORIGINAL_TYPE (TYPE_NAME (t)))
5727 cp_pedwarn_at ("%q#D does not refer to the unqualified "
5728 "type, so it is not used for linkage",
5733 pedwarn ("non-local function %q#D uses local type %qT", decl, t);
5737 TREE_PUBLIC (decl) = publicp;
5740 DECL_INTERFACE_KNOWN (decl) = 1;
5741 DECL_NOT_REALLY_EXTERN (decl) = 1;
5744 /* If the declaration was declared inline, mark it as such. */
5746 DECL_DECLARED_INLINE_P (decl) = 1;
5747 /* We inline functions that are explicitly declared inline, or, when
5748 the user explicitly asks us to, all functions. */
5749 if (DECL_DECLARED_INLINE_P (decl)
5750 || (flag_inline_trees == 2 && !DECL_INLINE (decl) && funcdef_flag))
5751 DECL_INLINE (decl) = 1;
5753 DECL_EXTERNAL (decl) = 1;
5754 if (quals && TREE_CODE (type) == FUNCTION_TYPE)
5756 error ("%smember function %qD cannot have cv-qualifier",
5757 (ctype ? "static " : "non-"), decl);
5758 quals = TYPE_UNQUALIFIED;
5761 if (IDENTIFIER_OPNAME_P (DECL_NAME (decl)))
5762 grok_op_properties (decl, friendp, /*complain=*/true);
5764 if (ctype && decl_function_context (decl))
5765 DECL_NO_STATIC_CHAIN (decl) = 1;
5767 for (t = TYPE_ARG_TYPES (TREE_TYPE (decl)); t; t = TREE_CHAIN (t))
5768 if (TREE_PURPOSE (t)
5769 && TREE_CODE (TREE_PURPOSE (t)) == DEFAULT_ARG)
5771 has_default_arg = 1;
5776 && TREE_CODE (orig_declarator) == TEMPLATE_ID_EXPR)
5780 ("defining explicit specialization %qD in friend declaration",
5784 tree fns = TREE_OPERAND (orig_declarator, 0);
5785 tree args = TREE_OPERAND (orig_declarator, 1);
5787 if (PROCESSING_REAL_TEMPLATE_DECL_P ())
5789 /* Something like `template <class T> friend void f<T>()'. */
5790 error ("invalid use of template-id %qD in declaration "
5791 "of primary template",
5797 /* A friend declaration of the form friend void f<>(). Record
5798 the information in the TEMPLATE_ID_EXPR. */
5799 SET_DECL_IMPLICIT_INSTANTIATION (decl);
5801 if (TREE_CODE (fns) == COMPONENT_REF)
5803 /* Due to bison parser ickiness, we will have already looked
5804 up an operator_name or PFUNCNAME within the current class
5805 (see template_id in parse.y). If the current class contains
5806 such a name, we'll get a COMPONENT_REF here. Undo that. */
5808 gcc_assert (TREE_TYPE (TREE_OPERAND (fns, 0))
5809 == current_class_type);
5810 fns = TREE_OPERAND (fns, 1);
5812 gcc_assert (TREE_CODE (fns) == IDENTIFIER_NODE
5813 || TREE_CODE (fns) == OVERLOAD);
5814 DECL_TEMPLATE_INFO (decl) = tree_cons (fns, args, NULL_TREE);
5816 if (has_default_arg)
5818 error ("default arguments are not allowed in declaration "
5819 "of friend template specialization %qD",
5826 error ("%<inline%> is not allowed in declaration of friend "
5827 "template specialization %qD",
5835 /* Make the init_value nonzero so pushdecl knows this is not
5836 tentative. error_mark_node is replaced later with the BLOCK. */
5837 DECL_INITIAL (decl) = error_mark_node;
5839 if (TYPE_NOTHROW_P (type) || nothrow_libfn_p (decl))
5840 TREE_NOTHROW (decl) = 1;
5842 /* Caller will do the rest of this. */
5846 if (flags == NO_SPECIAL && ctype && constructor_name_p (declarator, ctype))
5847 DECL_CONSTRUCTOR_P (decl) = 1;
5849 /* Function gets the ugly name, field gets the nice one. This call
5850 may change the type of the function (because of default
5852 if (ctype != NULL_TREE)
5853 grokclassfn (ctype, decl, flags, quals);
5855 decl = check_explicit_specialization (orig_declarator, decl,
5857 2 * (funcdef_flag != 0) +
5858 4 * (friendp != 0));
5859 if (decl == error_mark_node)
5864 cplus_decl_attributes (&decl, *attrlist, 0);
5865 *attrlist = NULL_TREE;
5868 if (ctype != NULL_TREE
5869 && (! TYPE_FOR_JAVA (ctype) || check_java_method (decl))
5874 old_decl = check_classfn (ctype, decl,
5875 (processing_template_decl
5876 > template_class_depth (ctype))
5877 ? current_template_parms
5880 if (old_decl && TREE_CODE (old_decl) == TEMPLATE_DECL)
5881 /* Because grokfndecl is always supposed to return a
5882 FUNCTION_DECL, we pull out the DECL_TEMPLATE_RESULT
5883 here. We depend on our callers to figure out that its
5884 really a template that's being returned. */
5885 old_decl = DECL_TEMPLATE_RESULT (old_decl);
5887 if (old_decl && DECL_STATIC_FUNCTION_P (old_decl)
5888 && TREE_CODE (TREE_TYPE (decl)) == METHOD_TYPE)
5889 /* Remove the `this' parm added by grokclassfn.
5890 XXX Isn't this done in start_function, too? */
5891 revert_static_member_fn (decl);
5892 if (old_decl && DECL_ARTIFICIAL (old_decl))
5893 error ("definition of implicitly-declared %qD", old_decl);
5900 /* Since we've smashed OLD_DECL to its
5901 DECL_TEMPLATE_RESULT, we must do the same to DECL. */
5902 if (TREE_CODE (decl) == TEMPLATE_DECL)
5903 decl = DECL_TEMPLATE_RESULT (decl);
5905 /* Attempt to merge the declarations. This can fail, in
5906 the case of some invalid specialization declarations. */
5907 pushed_scope = push_scope (ctype);
5908 ok = duplicate_decls (decl, old_decl);
5910 pop_scope (pushed_scope);
5913 error ("no %q#D member function declared in class %qT",
5921 if (DECL_CONSTRUCTOR_P (decl) && !grok_ctor_properties (ctype, decl))
5924 if (ctype == NULL_TREE || check)
5928 DECL_VIRTUAL_P (decl) = 1;
5933 /* DECL is a VAR_DECL for a static data member. Set flags to reflect
5934 the linkage that DECL will receive in the object file. */
5937 set_linkage_for_static_data_member (tree decl)
5939 /* A static data member always has static storage duration and
5940 external linkage. Note that static data members are forbidden in
5941 local classes -- the only situation in which a class has
5942 non-external linkage. */
5943 TREE_PUBLIC (decl) = 1;
5944 TREE_STATIC (decl) = 1;
5945 /* For non-template classes, static data members are always put
5946 out in exactly those files where they are defined, just as
5947 with ordinary namespace-scope variables. */
5948 if (!processing_template_decl)
5949 DECL_INTERFACE_KNOWN (decl) = 1;
5952 /* Create a VAR_DECL named NAME with the indicated TYPE.
5954 If SCOPE is non-NULL, it is the class type or namespace containing
5955 the variable. If SCOPE is NULL, the variable should is created in
5956 the innermost enclosings scope. */
5959 grokvardecl (tree type,
5961 const cp_decl_specifier_seq *declspecs,
5967 tree explicit_scope;
5969 gcc_assert (!name || TREE_CODE (name) == IDENTIFIER_NODE);
5971 /* Compute the scope in which to place the variable, but remember
5972 whether or not that scope was explicitly specified by the user. */
5973 explicit_scope = scope;
5976 /* An explicit "extern" specifier indicates a namespace-scope
5978 if (declspecs->storage_class == sc_extern)
5979 scope = current_namespace;
5980 else if (!at_function_scope_p ())
5981 scope = current_scope ();
5985 && (/* If the variable is a namespace-scope variable declared in a
5986 template, we need DECL_LANG_SPECIFIC. */
5987 (TREE_CODE (scope) == NAMESPACE_DECL && processing_template_decl)
5988 /* Similarly for namespace-scope variables with language linkage
5990 || (TREE_CODE (scope) == NAMESPACE_DECL
5991 && current_lang_name != lang_name_cplusplus)
5992 /* Similarly for static data members. */
5994 decl = build_lang_decl (VAR_DECL, name, type);
5996 decl = build_decl (VAR_DECL, name, type);
5998 if (explicit_scope && TREE_CODE (explicit_scope) == NAMESPACE_DECL)
5999 set_decl_namespace (decl, explicit_scope, 0);
6001 DECL_CONTEXT (decl) = scope;
6003 if (declspecs->storage_class == sc_extern)
6005 DECL_THIS_EXTERN (decl) = 1;
6006 DECL_EXTERNAL (decl) = !initialized;
6009 if (DECL_CLASS_SCOPE_P (decl))
6011 set_linkage_for_static_data_member (decl);
6012 /* This function is only called with out-of-class definitions. */
6013 DECL_EXTERNAL (decl) = 0;
6015 /* At top level, either `static' or no s.c. makes a definition
6016 (perhaps tentative), and absence of `static' makes it public. */
6017 else if (toplevel_bindings_p ())
6019 TREE_PUBLIC (decl) = (declspecs->storage_class != sc_static
6020 && (DECL_THIS_EXTERN (decl) || ! constp));
6021 TREE_STATIC (decl) = ! DECL_EXTERNAL (decl);
6023 /* Not at top level, only `static' makes a static definition. */
6026 TREE_STATIC (decl) = declspecs->storage_class == sc_static;
6027 TREE_PUBLIC (decl) = DECL_EXTERNAL (decl);
6030 if (declspecs->specs[(int)ds_thread])
6032 if (targetm.have_tls)
6033 DECL_THREAD_LOCAL (decl) = 1;
6035 /* A mere warning is sure to result in improper semantics
6036 at runtime. Don't bother to allow this to compile. */
6037 error ("thread-local storage not supported for this target");
6040 if (TREE_PUBLIC (decl))
6042 /* [basic.link]: A name with no linkage (notably, the name of a class
6043 or enumeration declared in a local scope) shall not be used to
6044 declare an entity with linkage.
6046 Only check this for public decls for now. */
6047 tree t1 = TREE_TYPE (decl);
6048 tree t = no_linkage_check (t1, /*relaxed_p=*/false);
6051 if (TYPE_ANONYMOUS_P (t))
6053 if (DECL_EXTERN_C_P (decl))
6054 /* Allow this; it's pretty common in C. */
6056 else if (same_type_ignoring_top_level_qualifiers_p(t1, t))
6057 /* This is something like "enum { a = 3 } x;", which is
6058 well formed. The enum doesn't have "a name with no
6059 linkage", because it has no name. See closed CWG issue
6062 Note that while this construct is well formed in C++03
6063 it is likely to become ill formed in C++0x. See open
6064 CWG issue 389 and related issues. */
6068 /* It's a typedef referring to an anonymous type. */
6069 pedwarn ("non-local variable %q#D uses anonymous type",
6071 if (DECL_ORIGINAL_TYPE (TYPE_NAME (t)))
6072 cp_pedwarn_at ("%q#D does not refer to the unqualified "
6073 "type, so it is not used for linkage",
6078 pedwarn ("non-local variable %q#D uses local type %qT", decl, t);
6085 /* Create and return a canonical pointer to member function type, for
6086 TYPE, which is a POINTER_TYPE to a METHOD_TYPE. */
6089 build_ptrmemfunc_type (tree type)
6093 tree unqualified_variant = NULL_TREE;
6095 if (type == error_mark_node)
6098 /* If a canonical type already exists for this type, use it. We use
6099 this method instead of type_hash_canon, because it only does a
6100 simple equality check on the list of field members. */
6102 if ((t = TYPE_GET_PTRMEMFUNC_TYPE (type)))
6105 /* Make sure that we always have the unqualified pointer-to-member
6107 if (cp_type_quals (type) != TYPE_UNQUALIFIED)
6109 = build_ptrmemfunc_type (TYPE_MAIN_VARIANT (type));
6111 t = make_aggr_type (RECORD_TYPE);
6112 xref_basetypes (t, NULL_TREE);
6114 /* Let the front-end know this is a pointer to member function... */
6115 TYPE_PTRMEMFUNC_FLAG (t) = 1;
6116 /* ... and not really an aggregate. */
6117 SET_IS_AGGR_TYPE (t, 0);
6119 field = build_decl (FIELD_DECL, pfn_identifier, type);
6122 field = build_decl (FIELD_DECL, delta_identifier, delta_type_node);
6123 TREE_CHAIN (field) = fields;
6126 finish_builtin_struct (t, "__ptrmemfunc_type", fields, ptr_type_node);
6128 /* Zap out the name so that the back-end will give us the debugging
6129 information for this anonymous RECORD_TYPE. */
6130 TYPE_NAME (t) = NULL_TREE;
6132 /* If this is not the unqualified form of this pointer-to-member
6133 type, set the TYPE_MAIN_VARIANT for this type to be the
6134 unqualified type. Since they are actually RECORD_TYPEs that are
6135 not variants of each other, we must do this manually. */
6136 if (cp_type_quals (type) != TYPE_UNQUALIFIED)
6138 t = build_qualified_type (t, cp_type_quals (type));
6139 TYPE_MAIN_VARIANT (t) = unqualified_variant;
6140 TYPE_NEXT_VARIANT (t) = TYPE_NEXT_VARIANT (unqualified_variant);
6141 TYPE_NEXT_VARIANT (unqualified_variant) = t;
6144 /* Cache this pointer-to-member type so that we can find it again
6146 TYPE_SET_PTRMEMFUNC_TYPE (type, t);
6151 /* Create and return a pointer to data member type. */
6154 build_ptrmem_type (tree class_type, tree member_type)
6156 if (TREE_CODE (member_type) == METHOD_TYPE)
6160 arg_types = TYPE_ARG_TYPES (member_type);
6161 class_type = (cp_build_qualified_type
6163 cp_type_quals (TREE_TYPE (TREE_VALUE (arg_types)))));
6165 = build_method_type_directly (class_type,
6166 TREE_TYPE (member_type),
6167 TREE_CHAIN (arg_types));
6168 return build_ptrmemfunc_type (build_pointer_type (member_type));
6172 gcc_assert (TREE_CODE (member_type) != FUNCTION_TYPE);
6173 return build_offset_type (class_type, member_type);
6177 /* DECL is a VAR_DECL defined in-class, whose TYPE is also given.
6178 Check to see that the definition is valid. Issue appropriate error
6179 messages. Return 1 if the definition is particularly bad, or 0
6183 check_static_variable_definition (tree decl, tree type)
6185 /* Motion 10 at San Diego: If a static const integral data member is
6186 initialized with an integral constant expression, the initializer
6187 may appear either in the declaration (within the class), or in
6188 the definition, but not both. If it appears in the class, the
6189 member is a member constant. The file-scope definition is always
6191 if (!ARITHMETIC_TYPE_P (type) && TREE_CODE (type) != ENUMERAL_TYPE)
6193 error ("invalid in-class initialization of static data member "
6194 "of non-integral type %qT",
6196 /* If we just return the declaration, crashes will sometimes
6197 occur. We therefore return void_type_node, as if this were a
6198 friend declaration, to cause callers to completely ignore
6199 this declaration. */
6202 else if (!CP_TYPE_CONST_P (type))
6203 error ("ISO C++ forbids in-class initialization of non-const "
6204 "static member %qD",
6206 else if (pedantic && !INTEGRAL_TYPE_P (type))
6207 pedwarn ("ISO C++ forbids initialization of member constant "
6208 "%qD of non-integral type %qT", decl, type);
6213 /* Given the SIZE (i.e., number of elements) in an array, compute an
6214 appropriate index type for the array. If non-NULL, NAME is the
6215 name of the thing being declared. */
6218 compute_array_index_type (tree name, tree size)
6220 tree type = TREE_TYPE (size);
6223 /* The array bound must be an integer type. */
6224 if (!dependent_type_p (type) && !INTEGRAL_TYPE_P (type))
6227 error ("size of array %qD has non-integral type %qT", name, type);
6229 error ("size of array has non-integral type %qT", type);
6230 size = integer_one_node;
6231 type = TREE_TYPE (size);
6234 if (abi_version_at_least (2)
6235 /* We should only handle value dependent expressions specially. */
6236 ? value_dependent_expression_p (size)
6237 /* But for abi-1, we handled all instances in templates. This
6238 effects the manglings produced. */
6239 : processing_template_decl)
6240 return build_index_type (build_min (MINUS_EXPR, sizetype,
6241 size, integer_one_node));
6243 /* The size might be the result of a cast. */
6244 STRIP_TYPE_NOPS (size);
6246 /* It might be a const variable or enumeration constant. */
6247 size = integral_constant_value (size);
6249 /* Normally, the array-bound will be a constant. */
6250 if (TREE_CODE (size) == INTEGER_CST)
6252 /* Check to see if the array bound overflowed. Make that an
6253 error, no matter how generous we're being. */
6254 int old_flag_pedantic_errors = flag_pedantic_errors;
6255 int old_pedantic = pedantic;
6256 pedantic = flag_pedantic_errors = 1;
6257 constant_expression_warning (size);
6258 pedantic = old_pedantic;
6259 flag_pedantic_errors = old_flag_pedantic_errors;
6261 /* An array must have a positive number of elements. */
6262 if (INT_CST_LT (size, integer_zero_node))
6265 error ("size of array %qD is negative", name);
6267 error ("size of array is negative");
6268 size = integer_one_node;
6270 /* As an extension we allow zero-sized arrays. We always allow
6271 them in system headers because glibc uses them. */
6272 else if (integer_zerop (size) && pedantic && !in_system_header)
6275 pedwarn ("ISO C++ forbids zero-size array %qD", name);
6277 pedwarn ("ISO C++ forbids zero-size array");
6280 else if (TREE_CONSTANT (size))
6282 /* `(int) &fn' is not a valid array bound. */
6284 error ("size of array %qD is not an integral constant-expression",
6287 error ("size of array is not an integral constant-expression");
6292 pedwarn ("ISO C++ forbids variable-size array %qD", name);
6294 pedwarn ("ISO C++ forbids variable-size array");
6297 if (processing_template_decl && !TREE_CONSTANT (size))
6298 /* A variable sized array. */
6299 itype = build_min (MINUS_EXPR, sizetype, size, integer_one_node);
6302 HOST_WIDE_INT saved_processing_template_decl;
6304 /* Compute the index of the largest element in the array. It is
6305 one less than the number of elements in the array. We save
6306 and restore PROCESSING_TEMPLATE_DECL so that computations in
6307 cp_build_binary_op will be appropriately folded. */
6308 saved_processing_template_decl = processing_template_decl;
6309 processing_template_decl = 0;
6310 itype = cp_build_binary_op (MINUS_EXPR,
6311 cp_convert (ssizetype, size),
6312 cp_convert (ssizetype, integer_one_node));
6313 itype = fold (itype);
6314 processing_template_decl = saved_processing_template_decl;
6316 if (!TREE_CONSTANT (itype))
6317 /* A variable sized array. */
6318 itype = variable_size (itype);
6319 /* Make sure that there was no overflow when creating to a signed
6320 index type. (For example, on a 32-bit machine, an array with
6321 size 2^32 - 1 is too big.) */
6322 else if (TREE_OVERFLOW (itype))
6324 error ("overflow in array dimension");
6325 TREE_OVERFLOW (itype) = 0;
6329 /* Create and return the appropriate index type. */
6330 return build_index_type (itype);
6333 /* Returns the scope (if any) in which the entity declared by
6334 DECLARATOR will be located. If the entity was declared with an
6335 unqualified name, NULL_TREE is returned. */
6338 get_scope_of_declarator (const cp_declarator *declarator)
6340 while (declarator && declarator->kind != cdk_id)
6341 declarator = declarator->declarator;
6343 /* If the declarator-id is a SCOPE_REF, the scope in which the
6344 declaration occurs is the first operand. */
6346 && declarator->u.id.qualifying_scope)
6347 return declarator->u.id.qualifying_scope;
6349 /* Otherwise, the declarator is not a qualified name; the entity will
6350 be declared in the current scope. */
6354 /* Returns an ARRAY_TYPE for an array with SIZE elements of the
6355 indicated TYPE. If non-NULL, NAME is the NAME of the declaration
6359 create_array_type_for_decl (tree name, tree type, tree size)
6361 tree itype = NULL_TREE;
6362 const char* error_msg;
6364 /* If things have already gone awry, bail now. */
6365 if (type == error_mark_node || size == error_mark_node)
6366 return error_mark_node;
6368 /* Assume that everything will go OK. */
6371 /* There are some types which cannot be array elements. */
6372 switch (TREE_CODE (type))
6375 error_msg = "array of void";
6379 error_msg = "array of functions";
6382 case REFERENCE_TYPE:
6383 error_msg = "array of references";
6387 error_msg = "array of function members";
6394 /* If something went wrong, issue an error-message and return. */
6398 error ("declaration of %qD as %s", name, error_msg);
6400 error ("creating %s", error_msg);
6402 return error_mark_node;
6407 The constant expressions that specify the bounds of the arrays
6408 can be omitted only for the first member of the sequence. */
6409 if (TREE_CODE (type) == ARRAY_TYPE && !TYPE_DOMAIN (type))
6412 error ("declaration of %qD as multidimensional array must "
6413 "have bounds for all dimensions except the first",
6416 error ("multidimensional array must have bounds for all "
6417 "dimensions except the first");
6419 return error_mark_node;
6422 /* Figure out the index type for the array. */
6424 itype = compute_array_index_type (name, size);
6427 T is called the array element type; this type shall not be [...] an
6428 abstract class type. */
6429 abstract_virtuals_error (name, type);
6431 return build_cplus_array_type (type, itype);
6434 /* Check that it's OK to declare a function with the indicated TYPE.
6435 SFK indicates the kind of special function (if any) that this
6436 function is. OPTYPE is the type given in a conversion operator
6437 declaration, or the class type for a constructor/destructor.
6438 Returns the actual return type of the function; that
6439 may be different than TYPE if an error occurs, or for certain
6440 special functions. */
6443 check_special_function_return_type (special_function_kind sfk,
6449 case sfk_constructor:
6451 error ("return type specification for constructor invalid");
6453 if (targetm.cxx.cdtor_returns_this () && !TYPE_FOR_JAVA (optype))
6454 type = build_pointer_type (optype);
6456 type = void_type_node;
6459 case sfk_destructor:
6461 error ("return type specification for destructor invalid");
6462 /* We can't use the proper return type here because we run into
6463 problems with ambiguous bases and covariant returns.
6464 Java classes are left unchanged because (void *) isn't a valid
6465 Java type, and we don't want to change the Java ABI. */
6466 if (targetm.cxx.cdtor_returns_this () && !TYPE_FOR_JAVA (optype))
6467 type = build_pointer_type (void_type_node);
6469 type = void_type_node;
6472 case sfk_conversion:
6473 if (type && !same_type_p (type, optype))
6474 error ("operator %qT declared to return %qT", optype, type);
6476 pedwarn ("return type specified for %<operator %T%>", optype);
6487 /* A variable or data member (whose unqualified name is IDENTIFIER)
6488 has been declared with the indicated TYPE. If the TYPE is not
6489 acceptable, issue an error message and return a type to use for
6490 error-recovery purposes. */
6493 check_var_type (tree identifier, tree type)
6495 if (VOID_TYPE_P (type))
6498 error ("unnamed variable or field declared void");
6499 else if (TREE_CODE (identifier) == IDENTIFIER_NODE)
6501 gcc_assert (!IDENTIFIER_OPNAME_P (identifier));
6502 error ("variable or field %qE declared void", identifier);
6505 error ("variable or field declared void");
6506 type = integer_type_node;
6512 /* Given declspecs and a declarator (abstract or otherwise), determine
6513 the name and type of the object declared and construct a DECL node
6516 DECLSPECS is a chain of tree_list nodes whose value fields
6517 are the storage classes and type specifiers.
6519 DECL_CONTEXT says which syntactic context this declaration is in:
6520 NORMAL for most contexts. Make a VAR_DECL or FUNCTION_DECL or TYPE_DECL.
6521 FUNCDEF for a function definition. Like NORMAL but a few different
6522 error messages in each case. Return value may be zero meaning
6523 this definition is too screwy to try to parse.
6524 MEMFUNCDEF for a function definition. Like FUNCDEF but prepares to
6525 handle member functions (which have FIELD context).
6526 Return value may be zero meaning this definition is too screwy to
6528 PARM for a parameter declaration (either within a function prototype
6529 or before a function body). Make a PARM_DECL, or return void_type_node.
6530 CATCHPARM for a parameter declaration before a catch clause.
6531 TYPENAME if for a typename (in a cast or sizeof).
6532 Don't make a DECL node; just return the ..._TYPE node.
6533 FIELD for a struct or union field; make a FIELD_DECL.
6534 BITFIELD for a field with specified width.
6535 INITIALIZED is 1 if the decl has an initializer.
6537 ATTRLIST is a pointer to the list of attributes, which may be NULL
6538 if there are none; *ATTRLIST may be modified if attributes from inside
6539 the declarator should be applied to the declaration.
6541 When this function is called, scoping variables (such as
6542 CURRENT_CLASS_TYPE) should reflect the scope in which the
6543 declaration occurs, not the scope in which the new declaration will
6544 be placed. For example, on:
6548 when grokdeclarator is called for `S::f', the CURRENT_CLASS_TYPE
6549 should not be `S'. */
6552 grokdeclarator (const cp_declarator *declarator,
6553 const cp_decl_specifier_seq *declspecs,
6554 enum decl_context decl_context,
6558 tree type = NULL_TREE;
6561 int virtualp, explicitp, friendp, inlinep, staticp;
6562 int explicit_int = 0;
6563 int explicit_char = 0;
6564 int defaulted_int = 0;
6565 tree dependant_name = NULL_TREE;
6567 tree typedef_decl = NULL_TREE;
6568 const char *name = NULL;
6569 tree typedef_type = NULL_TREE;
6570 int funcdef_flag = 0;
6571 cp_declarator_kind innermost_code = cdk_error;
6574 /* See the code below that used this. */
6575 tree decl_attr = NULL_TREE;
6578 /* Keep track of what sort of function is being processed
6579 so that we can warn about default return values, or explicit
6580 return values which do not match prescribed defaults. */
6581 special_function_kind sfk = sfk_none;
6583 tree dname = NULL_TREE;
6584 tree ctor_return_type = NULL_TREE;
6585 enum overload_flags flags = NO_SPECIAL;
6586 cp_cv_quals quals = TYPE_UNQUALIFIED;
6587 tree raises = NULL_TREE;
6588 int template_count = 0;
6589 tree returned_attrs = NULL_TREE;
6590 tree parms = NULL_TREE;
6591 const cp_declarator *id_declarator;
6592 /* The unqualified name of the declarator; either an
6593 IDENTIFIER_NODE, BIT_NOT_EXPR, or TEMPLATE_ID_EXPR. */
6594 tree unqualified_id;
6595 /* The class type, if any, in which this entity is located,
6596 or NULL_TREE if none. Note that this value may be different from
6597 the current class type; for example if an attempt is made to declare
6598 "A::f" inside "B", this value will be "A". */
6599 tree ctype = current_class_type;
6600 /* The NAMESPACE_DECL for the namespace in which this entity is
6601 located. If an unqualified name is used to declare the entity,
6602 this value will be NULL_TREE, even if the entity is located at
6604 tree in_namespace = NULL_TREE;
6606 cp_storage_class storage_class;
6607 bool unsigned_p, signed_p, short_p, long_p, thread_p;
6608 bool type_was_error_mark_node = false;
6610 signed_p = declspecs->specs[(int)ds_signed];
6611 unsigned_p = declspecs->specs[(int)ds_unsigned];
6612 short_p = declspecs->specs[(int)ds_short];
6613 long_p = declspecs->specs[(int)ds_long];
6614 thread_p = declspecs->specs[(int)ds_thread];
6616 if (decl_context == FUNCDEF)
6617 funcdef_flag = 1, decl_context = NORMAL;
6618 else if (decl_context == MEMFUNCDEF)
6619 funcdef_flag = -1, decl_context = FIELD;
6620 else if (decl_context == BITFIELD)
6621 bitfield = 1, decl_context = FIELD;
6623 /* Look inside a declarator for the name being declared
6624 and get it as a string, for an error message. */
6625 for (id_declarator = declarator;
6627 id_declarator = id_declarator->declarator)
6629 if (id_declarator->kind != cdk_id)
6630 innermost_code = id_declarator->kind;
6632 switch (id_declarator->kind)
6635 if (id_declarator->declarator
6636 && id_declarator->declarator->kind == cdk_id)
6638 sfk = id_declarator->declarator->u.id.sfk;
6639 if (sfk == sfk_destructor)
6646 tree qualifying_scope = id_declarator->u.id.qualifying_scope;
6647 tree decl = id_declarator->u.id.unqualified_name;
6650 if (qualifying_scope)
6652 if (TYPE_P (qualifying_scope))
6654 ctype = qualifying_scope;
6655 if (innermost_code != cdk_function
6656 && current_class_type
6657 && !UNIQUELY_DERIVED_FROM_P (ctype,
6658 current_class_type))
6660 error ("type %qT is not derived from type %qT",
6661 ctype, current_class_type);
6662 return error_mark_node;
6665 else if (TREE_CODE (qualifying_scope) == NAMESPACE_DECL)
6666 in_namespace = qualifying_scope;
6668 if (TREE_CODE (decl) == BASELINK)
6669 decl = BASELINK_FUNCTIONS (decl);
6670 if (decl == error_mark_node)
6671 return error_mark_node;
6672 switch (TREE_CODE (decl))
6676 tree type = TREE_OPERAND (decl, 0);
6677 type = constructor_name (type);
6678 name = IDENTIFIER_POINTER (type);
6682 case TEMPLATE_ID_EXPR:
6684 tree fns = TREE_OPERAND (decl, 0);
6687 if (TREE_CODE (dname) == COMPONENT_REF)
6688 dname = TREE_OPERAND (dname, 1);
6689 if (TREE_CODE (dname) != IDENTIFIER_NODE)
6691 gcc_assert (is_overloaded_fn (dname));
6692 dname = DECL_NAME (get_first_fn (dname));
6697 case IDENTIFIER_NODE:
6698 if (TREE_CODE (decl) == IDENTIFIER_NODE)
6701 if (C_IS_RESERVED_WORD (dname))
6703 error ("declarator-id missing; using reserved word %qD",
6705 name = IDENTIFIER_POINTER (dname);
6707 else if (!IDENTIFIER_TYPENAME_P (dname))
6708 name = IDENTIFIER_POINTER (dname);
6711 gcc_assert (flags == NO_SPECIAL);
6712 flags = TYPENAME_FLAG;
6713 ctor_return_type = TREE_TYPE (dname);
6714 sfk = sfk_conversion;
6715 if (is_typename_at_global_scope (dname))
6716 name = IDENTIFIER_POINTER (dname);
6718 name = "<invalid operator>";
6723 dname = constructor_name (TREE_TYPE (decl));
6724 name = IDENTIFIER_POINTER (dname);
6745 if (id_declarator->kind == cdk_id)
6749 /* A function definition's declarator must have the form of
6750 a function declarator. */
6752 if (funcdef_flag && innermost_code != cdk_function)
6755 if (((dname && IDENTIFIER_OPNAME_P (dname)) || flags == TYPENAME_FLAG)
6756 && innermost_code != cdk_function
6757 && ! (ctype && !declspecs->any_specifiers_p))
6759 error ("declaration of %qD as non-function", dname);
6760 return error_mark_node;
6763 /* Anything declared one level down from the top level
6764 must be one of the parameters of a function
6765 (because the body is at least two levels down). */
6767 /* This heuristic cannot be applied to C++ nodes! Fixed, however,
6768 by not allowing C++ class definitions to specify their parameters
6769 with xdecls (must be spec.d in the parmlist).
6771 Since we now wait to push a class scope until we are sure that
6772 we are in a legitimate method context, we must set oldcname
6773 explicitly (since current_class_name is not yet alive).
6775 We also want to avoid calling this a PARM if it is in a namespace. */
6777 if (decl_context == NORMAL && !toplevel_bindings_p ())
6779 struct cp_binding_level *b = current_binding_level;
6780 current_binding_level = b->level_chain;
6781 if (current_binding_level != 0 && toplevel_bindings_p ())
6782 decl_context = PARM;
6783 current_binding_level = b;
6787 name = decl_context == PARM ? "parameter" : "type name";
6789 /* If there were multiple types specified in the decl-specifier-seq,
6790 issue an error message. */
6791 if (declspecs->multiple_types_p)
6792 error ("two or more data types in declaration of %qs", name);
6793 /* Extract the basic type from the decl-specifier-seq. */
6794 type = declspecs->type;
6795 if (type == error_mark_node)
6798 type_was_error_mark_node = true;
6800 /* If the entire declaration is itself tagged as deprecated then
6801 suppress reports of deprecated items. */
6802 if (type && TREE_DEPRECATED (type)
6803 && deprecated_state != DEPRECATED_SUPPRESS)
6804 warn_deprecated_use (type);
6805 if (type && TREE_CODE (type) == TYPE_DECL)
6807 typedef_decl = type;
6808 type = TREE_TYPE (typedef_decl);
6810 /* No type at all: default to `int', and set DEFAULTED_INT
6811 because it was not a user-defined typedef. */
6812 if (type == NULL_TREE && (signed_p || unsigned_p || long_p || short_p))
6814 /* These imply 'int'. */
6815 type = integer_type_node;
6819 explicit_int = declspecs->explicit_int_p;
6820 explicit_char = declspecs->explicit_char_p;
6822 /* Check for repeated decl-specifiers. */
6823 for (ds = ds_first; ds != ds_last; ++ds)
6825 unsigned count = declspecs->specs[(int)ds];
6828 /* The "long" specifier is a special case because of
6833 error ("%<long long long%> is too long for GCC");
6834 else if (pedantic && !in_system_header && warn_long_long)
6835 pedwarn ("ISO C++ does not support %<long long%>");
6839 else if (declspecs->specs[(int)ds] > 1)
6841 static const char *const decl_spec_names[] = {
6857 error ("duplicate %qs", decl_spec_names[(int)ds]);
6862 /* See the code below that used this. */
6864 decl_attr = DECL_ATTRIBUTES (typedef_decl);
6866 typedef_type = type;
6869 if (sfk != sfk_conversion)
6870 ctor_return_type = ctype;
6872 if (sfk != sfk_none)
6873 type = check_special_function_return_type (sfk, type,
6875 else if (type == NULL_TREE)
6881 /* We handle `main' specially here, because 'main () { }' is so
6882 common. With no options, it is allowed. With -Wreturn-type,
6883 it is a warning. It is only an error with -pedantic-errors. */
6884 is_main = (funcdef_flag
6885 && dname && MAIN_NAME_P (dname)
6886 && ctype == NULL_TREE
6887 && in_namespace == NULL_TREE
6888 && current_namespace == global_namespace);
6890 if (type_was_error_mark_node)
6891 /* We've already issued an error, don't complain more. */;
6892 else if (in_system_header || flag_ms_extensions)
6893 /* Allow it, sigh. */;
6894 else if (pedantic || ! is_main)
6895 pedwarn ("ISO C++ forbids declaration of %qs with no type", name);
6896 else if (warn_return_type)
6897 warning ("ISO C++ forbids declaration of %qs with no type", name);
6899 type = integer_type_node;
6904 /* Now process the modifiers that were specified
6905 and check for invalid combinations. */
6907 /* Long double is a special combination. */
6908 if (long_p && TYPE_MAIN_VARIANT (type) == double_type_node)
6911 type = build_qualified_type (long_double_type_node,
6912 cp_type_quals (type));
6915 /* Check all other uses of type modifiers. */
6917 if (unsigned_p || signed_p || long_p || short_p)
6921 if (TREE_CODE (type) == REAL_TYPE)
6922 error ("short, signed or unsigned invalid for %qs", name);
6923 else if (TREE_CODE (type) != INTEGER_TYPE)
6924 error ("long, short, signed or unsigned invalid for %qs", name);
6925 else if (long_p && short_p)
6926 error ("long and short specified together for %qs", name);
6927 else if ((long_p || short_p) && explicit_char)
6928 error ("long or short specified with char for %qs", name);
6929 else if ((long_p|| short_p) && TREE_CODE (type) == REAL_TYPE)
6930 error ("long or short specified with floating type for %qs", name);
6931 else if (signed_p && unsigned_p)
6932 error ("signed and unsigned given together for %qs", name);
6936 if (!explicit_int && !defaulted_int && !explicit_char && pedantic)
6938 pedwarn ("long, short, signed or unsigned used invalidly for %qs",
6940 if (flag_pedantic_errors)
6945 /* Discard the type modifiers if they are invalid. */
6956 /* Decide whether an integer type is signed or not.
6957 Optionally treat bitfields as signed by default. */
6961 It is implementation-defined whether a plain (neither
6962 explicitly signed or unsigned) char, short, int, or long
6963 bit-field is signed or unsigned.
6965 Naturally, we extend this to long long as well. Note that
6966 this does not include wchar_t. */
6967 || (bitfield && !flag_signed_bitfields
6969 /* A typedef for plain `int' without `signed' can be
6970 controlled just like plain `int', but a typedef for
6971 `signed int' cannot be so controlled. */
6973 && C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl))
6974 && (TREE_CODE (type) == INTEGER_TYPE
6975 || TREE_CODE (type) == CHAR_TYPE)
6976 && !same_type_p (TYPE_MAIN_VARIANT (type), wchar_type_node)))
6979 type = long_long_unsigned_type_node;
6981 type = long_unsigned_type_node;
6983 type = short_unsigned_type_node;
6984 else if (type == char_type_node)
6985 type = unsigned_char_type_node;
6986 else if (typedef_decl)
6987 type = c_common_unsigned_type (type);
6989 type = unsigned_type_node;
6991 else if (signed_p && type == char_type_node)
6992 type = signed_char_type_node;
6994 type = long_long_integer_type_node;
6996 type = long_integer_type_node;
6998 type = short_integer_type_node;
7000 if (declspecs->specs[(int)ds_complex])
7002 if (TREE_CODE (type) != INTEGER_TYPE && TREE_CODE (type) != REAL_TYPE)
7003 error ("complex invalid for %qs", name);
7004 /* If we just have "complex", it is equivalent to
7005 "complex double", but if any modifiers at all are specified it is
7006 the complex form of TYPE. E.g, "complex short" is
7007 "complex short int". */
7009 else if (defaulted_int && ! longlong
7010 && ! (long_p || short_p || signed_p || unsigned_p))
7011 type = complex_double_type_node;
7012 else if (type == integer_type_node)
7013 type = complex_integer_type_node;
7014 else if (type == float_type_node)
7015 type = complex_float_type_node;
7016 else if (type == double_type_node)
7017 type = complex_double_type_node;
7018 else if (type == long_double_type_node)
7019 type = complex_long_double_type_node;
7021 type = build_complex_type (type);
7024 type_quals = TYPE_UNQUALIFIED;
7025 if (declspecs->specs[(int)ds_const])
7026 type_quals |= TYPE_QUAL_CONST;
7027 if (declspecs->specs[(int)ds_volatile])
7028 type_quals |= TYPE_QUAL_VOLATILE;
7029 if (declspecs->specs[(int)ds_restrict])
7030 type_quals |= TYPE_QUAL_RESTRICT;
7031 if (sfk == sfk_conversion && type_quals != TYPE_UNQUALIFIED)
7032 error ("qualifiers are not allowed on declaration of %<operator %T%>",
7035 type_quals |= cp_type_quals (type);
7036 type = cp_build_qualified_type_real
7037 (type, type_quals, ((typedef_decl && !DECL_ARTIFICIAL (typedef_decl)
7038 ? tf_ignore_bad_quals : 0) | tf_error | tf_warning));
7039 /* We might have ignored or rejected some of the qualifiers. */
7040 type_quals = cp_type_quals (type);
7043 inlinep = !! declspecs->specs[(int)ds_inline];
7044 virtualp = !! declspecs->specs[(int)ds_virtual];
7045 explicitp = !! declspecs->specs[(int)ds_explicit];
7047 storage_class = declspecs->storage_class;
7048 if (storage_class == sc_static)
7049 staticp = 1 + (decl_context == FIELD);
7051 if (virtualp && staticp == 2)
7053 error ("member %qD cannot be declared both virtual and static", dname);
7056 friendp = !! declspecs->specs[(int)ds_friend];
7058 if (dependant_name && !friendp)
7060 error ("%<%T::%D%> is not a valid declarator", ctype, dependant_name);
7061 return void_type_node;
7064 /* Issue errors about use of storage classes for parameters. */
7065 if (decl_context == PARM)
7067 if (declspecs->specs[(int)ds_typedef])
7068 error ("typedef declaration invalid in parameter declaration");
7069 else if (storage_class == sc_static
7070 || storage_class == sc_extern
7072 error ("storage class specifiers invalid in parameter declarations");
7075 /* Give error if `virtual' is used outside of class declaration. */
7077 && (current_class_name == NULL_TREE || decl_context != FIELD))
7079 error ("virtual outside class declaration");
7083 /* Static anonymous unions are dealt with here. */
7084 if (staticp && decl_context == TYPENAME
7086 && ANON_AGGR_TYPE_P (declspecs->type))
7087 decl_context = FIELD;
7089 /* Warn about storage classes that are invalid for certain
7090 kinds of declarations (parameters, typenames, etc.). */
7091 if (declspecs->multiple_storage_classes_p)
7092 error ("multiple storage classes in declaration of %qs", name);
7095 && storage_class != sc_extern
7096 && storage_class != sc_static)
7097 || declspecs->specs[(int)ds_typedef]))
7099 error ("multiple storage classes in declaration of %qs", name);
7102 else if (decl_context != NORMAL
7103 && ((storage_class != sc_none
7104 && storage_class != sc_mutable)
7107 if ((decl_context == PARM || decl_context == CATCHPARM)
7108 && (storage_class == sc_register
7109 || storage_class == sc_auto))
7111 else if (declspecs->specs[(int)ds_typedef])
7113 else if (decl_context == FIELD
7114 /* C++ allows static class elements. */
7115 && storage_class == sc_static)
7116 /* C++ also allows inlines and signed and unsigned elements,
7117 but in those cases we don't come in here. */
7121 if (decl_context == FIELD)
7123 tree tmp = NULL_TREE;
7128 /* Avoid trying to get an operand off an identifier node. */
7129 if (declarator->kind != cdk_id)
7130 tmp = declarator->declarator->u.id.unqualified_name;
7132 tmp = declarator->u.id.unqualified_name;
7133 op = IDENTIFIER_OPNAME_P (tmp);
7134 if (IDENTIFIER_TYPENAME_P (tmp))
7136 if (is_typename_at_global_scope (tmp))
7137 name = IDENTIFIER_POINTER (tmp);
7139 name = "<invalid operator>";
7142 error ("storage class specified for %s %qs",
7143 op ? "member operator" : "field",
7148 if (decl_context == PARM || decl_context == CATCHPARM)
7149 error ("storage class specified for parameter %qs", name);
7151 error ("storage class specified for typename");
7153 if (storage_class == sc_register
7154 || storage_class == sc_auto
7155 || storage_class == sc_extern
7157 storage_class = sc_none;
7160 else if (storage_class == sc_extern && initialized
7163 if (toplevel_bindings_p ())
7165 /* It's common practice (and completely valid) to have a const
7166 be initialized and declared extern. */
7167 if (!(type_quals & TYPE_QUAL_CONST))
7168 warning ("%qs initialized and declared %<extern%>", name);
7171 error ("%qs has both %<extern%> and initializer", name);
7173 else if (storage_class == sc_extern && funcdef_flag
7174 && ! toplevel_bindings_p ())
7175 error ("nested function %qs declared %<extern%>", name);
7176 else if (toplevel_bindings_p ())
7178 if (storage_class == sc_auto)
7179 error ("top-level declaration of %qs specifies %<auto%>", name);
7182 && storage_class != sc_extern
7183 && storage_class != sc_static)
7185 error ("function-scope %qs implicitly auto and declared %<__thread%>",
7190 if (storage_class && friendp)
7191 error ("storage class specifiers invalid in friend function declarations");
7194 unqualified_id = NULL_TREE;
7197 unqualified_id = id_declarator->u.id.unqualified_name;
7198 if (TREE_CODE (unqualified_id) == BASELINK)
7199 unqualified_id = BASELINK_FUNCTIONS (unqualified_id);
7200 switch (TREE_CODE (unqualified_id))
7204 = constructor_name (TREE_OPERAND (unqualified_id, 0));
7209 = constructor_name (TREE_TYPE (unqualified_id));
7212 case IDENTIFIER_NODE:
7213 case TEMPLATE_ID_EXPR:
7221 /* Determine the type of the entity declared by recurring on the
7224 declarator && declarator->kind != cdk_id;
7225 declarator = declarator->declarator)
7227 const cp_declarator *inner_declarator;
7230 if (type == error_mark_node)
7231 return error_mark_node;
7233 inner_declarator = declarator->declarator;
7235 attrs = declarator->attributes;
7241 if (declarator == NULL || declarator->kind == cdk_id)
7242 attr_flags |= (int) ATTR_FLAG_DECL_NEXT;
7243 if (declarator->kind == cdk_function)
7244 attr_flags |= (int) ATTR_FLAG_FUNCTION_NEXT;
7245 if (declarator->kind == cdk_array)
7246 attr_flags |= (int) ATTR_FLAG_ARRAY_NEXT;
7247 returned_attrs = decl_attributes (&type,
7248 chainon (returned_attrs, attrs),
7252 switch (declarator->kind)
7255 type = create_array_type_for_decl (dname, type,
7256 declarator->u.array.bounds);
7264 /* Declaring a function type.
7265 Make sure we have a valid type for the function to return. */
7267 /* We now know that the TYPE_QUALS don't apply to the
7268 decl, but to its return type. */
7269 type_quals = TYPE_UNQUALIFIED;
7271 /* Warn about some types functions can't return. */
7273 if (TREE_CODE (type) == FUNCTION_TYPE)
7275 error ("%qs declared as function returning a function", name);
7276 type = integer_type_node;
7278 if (TREE_CODE (type) == ARRAY_TYPE)
7280 error ("%qs declared as function returning an array", name);
7281 type = integer_type_node;
7284 /* Pick up type qualifiers which should be applied to `this'. */
7285 quals = declarator->u.function.qualifiers;
7287 /* Pick up the exception specifications. */
7288 raises = declarator->u.function.exception_specification;
7290 /* Say it's a definition only for the CALL_EXPR
7291 closest to the identifier. */
7292 funcdecl_p = inner_declarator && inner_declarator->kind == cdk_id;
7294 if (ctype == NULL_TREE
7295 && decl_context == FIELD
7297 && (friendp == 0 || dname == current_class_name))
7298 ctype = current_class_type;
7300 if (ctype && sfk == sfk_conversion)
7301 TYPE_HAS_CONVERSION (ctype) = 1;
7302 if (ctype && (sfk == sfk_constructor
7303 || sfk == sfk_destructor))
7305 /* We are within a class's scope. If our declarator name
7306 is the same as the class name, and we are defining
7307 a function, then it is a constructor/destructor, and
7308 therefore returns a void type. */
7310 if (flags == DTOR_FLAG)
7312 /* ISO C++ 12.4/2. A destructor may not be
7313 declared const or volatile. A destructor may
7316 error ("destructor cannot be static member function");
7319 error ("destructors may not be cv-qualified");
7320 quals = TYPE_UNQUALIFIED;
7322 if (decl_context == FIELD)
7324 if (! member_function_or_else (ctype,
7327 return void_type_node;
7330 else /* It's a constructor. */
7334 /* ISO C++ 12.1. A constructor may not be
7335 declared const or volatile. A constructor may
7336 not be virtual. A constructor may not be
7339 error ("constructor cannot be static member function");
7342 pedwarn ("constructors cannot be declared virtual");
7347 error ("constructors may not be cv-qualified");
7348 quals = TYPE_UNQUALIFIED;
7350 if (decl_context == FIELD)
7352 if (! member_function_or_else (ctype,
7355 return void_type_node;
7356 TYPE_HAS_CONSTRUCTOR (ctype) = 1;
7357 if (sfk != sfk_constructor)
7361 if (decl_context == FIELD)
7367 error ("can't initialize friend function %qs", name);
7370 /* Cannot be both friend and virtual. */
7371 error ("virtual functions cannot be friends");
7374 if (decl_context == NORMAL)
7375 error ("friend declaration not in class definition");
7376 if (current_function_decl && funcdef_flag)
7377 error ("can't define friend function %qs in a local "
7382 arg_types = grokparms (declarator->u.function.parameters,
7385 if (inner_declarator
7386 && inner_declarator->kind == cdk_id
7387 && inner_declarator->u.id.sfk == sfk_destructor
7388 && arg_types != void_list_node)
7390 error ("destructors may not have parameters");
7391 arg_types = void_list_node;
7395 type = build_function_type (type, arg_types);
7402 /* Filter out pointers-to-references and references-to-references.
7403 We can get these if a TYPE_DECL is used. */
7405 if (TREE_CODE (type) == REFERENCE_TYPE)
7407 error (declarator->kind == cdk_reference
7408 ? "cannot declare reference to %q#T"
7409 : "cannot declare pointer to %q#T", type);
7410 type = TREE_TYPE (type);
7412 else if (VOID_TYPE_P (type))
7414 if (declarator->kind == cdk_reference)
7415 error ("cannot declare reference to %q#T", type);
7416 else if (declarator->kind == cdk_ptrmem)
7417 error ("cannot declare pointer to %q#T member", type);
7420 /* We now know that the TYPE_QUALS don't apply to the decl,
7421 but to the target of the pointer. */
7422 type_quals = TYPE_UNQUALIFIED;
7424 if (declarator->kind == cdk_ptrmem
7425 && (TREE_CODE (type) == FUNCTION_TYPE
7426 || (quals && TREE_CODE (type) == METHOD_TYPE)))
7428 tree dummy = build_decl (TYPE_DECL, NULL_TREE, type);
7429 grok_method_quals (declarator->u.pointer.class_type,
7431 type = TREE_TYPE (dummy);
7432 quals = TYPE_UNQUALIFIED;
7435 if (declarator->kind == cdk_reference)
7437 if (!VOID_TYPE_P (type))
7438 type = build_reference_type (type);
7440 else if (TREE_CODE (type) == METHOD_TYPE)
7441 type = build_ptrmemfunc_type (build_pointer_type (type));
7442 else if (declarator->kind == cdk_ptrmem)
7444 /* We might have parsed a namespace as the class type. */
7445 if (TREE_CODE (declarator->u.pointer.class_type)
7448 error ("%qD is a namespace",
7449 declarator->u.pointer.class_type);
7450 type = build_pointer_type (type);
7453 type = build_ptrmem_type (declarator->u.pointer.class_type,
7457 type = build_pointer_type (type);
7459 /* Process a list of type modifier keywords (such as
7460 const or volatile) that were given inside the `*' or `&'. */
7462 if (declarator->u.pointer.qualifiers)
7465 = cp_build_qualified_type (type,
7466 declarator->u.pointer.qualifiers);
7467 type_quals = cp_type_quals (type);
7480 if (unqualified_id && TREE_CODE (unqualified_id) == TEMPLATE_ID_EXPR
7481 && TREE_CODE (type) != FUNCTION_TYPE
7482 && TREE_CODE (type) != METHOD_TYPE)
7484 error ("template-id %qD used as a declarator",
7486 unqualified_id = dname;
7489 /* If DECLARATOR is non-NULL, we know it is a cdk_id declarator;
7490 otherwise, we would not have exited the loop above. */
7492 && declarator->u.id.qualifying_scope
7493 && TYPE_P (declarator->u.id.qualifying_scope))
7497 ctype = declarator->u.id.qualifying_scope;
7498 ctype = TYPE_MAIN_VARIANT (ctype);
7500 while (t != NULL_TREE && CLASS_TYPE_P (t))
7502 /* You're supposed to have one `template <...>' for every
7503 template class, but you don't need one for a full
7504 specialization. For example:
7506 template <class T> struct S{};
7507 template <> struct S<int> { void f(); };
7508 void S<int>::f () {}
7510 is correct; there shouldn't be a `template <>' for the
7511 definition of `S<int>::f'. */
7512 if (CLASSTYPE_TEMPLATE_INFO (t)
7513 && (CLASSTYPE_TEMPLATE_INSTANTIATION (t)
7514 || uses_template_parms (CLASSTYPE_TI_ARGS (t)))
7515 && PRIMARY_TEMPLATE_P (CLASSTYPE_TI_TEMPLATE (t)))
7516 template_count += 1;
7518 t = TYPE_MAIN_DECL (t);
7519 t = DECL_CONTEXT (t);
7522 if (ctype == current_class_type)
7528 Is this ill-formed? */
7531 pedwarn ("extra qualification %<%T::%> on member %qs ignored",
7534 else if (TREE_CODE (type) == FUNCTION_TYPE)
7536 tree sname = declarator->u.id.unqualified_name;
7538 if (TREE_CODE (sname) == IDENTIFIER_NODE
7539 && NEW_DELETE_OPNAME_P (sname))
7540 /* Overloaded operator new and operator delete
7541 are always static functions. */
7543 else if (current_class_type == NULL_TREE || friendp)
7545 = build_method_type_directly (ctype,
7547 TYPE_ARG_TYPES (type));
7550 error ("cannot declare member function %<%T::%s%> within %<%T%>",
7551 ctype, name, current_class_type);
7552 return error_mark_node;
7555 else if (declspecs->specs[(int)ds_typedef]
7556 || COMPLETE_TYPE_P (complete_type (ctype)))
7558 /* Have to move this code elsewhere in this function.
7559 this code is used for i.e., typedef int A::M; M *pm;
7561 It is? How? jason 10/2/94 */
7563 if (current_class_type)
7565 error ("cannot declare member %<%T::%s%> within %qT",
7566 ctype, name, current_class_type);
7567 return void_type_node;
7572 cxx_incomplete_type_error (NULL_TREE, ctype);
7573 return error_mark_node;
7580 *attrlist = chainon (returned_attrs, *attrlist);
7582 attrlist = &returned_attrs;
7585 /* Now TYPE has the actual type. */
7587 /* Did array size calculations overflow? */
7589 if (TREE_CODE (type) == ARRAY_TYPE
7590 && COMPLETE_TYPE_P (type)
7591 && TREE_OVERFLOW (TYPE_SIZE (type)))
7593 error ("size of array %qs is too large", name);
7594 /* If we proceed with the array type as it is, we'll eventually
7595 crash in tree_low_cst(). */
7596 type = error_mark_node;
7599 if ((decl_context == FIELD || decl_context == PARM)
7600 && !processing_template_decl
7601 && variably_modified_type_p (type, NULL_TREE))
7603 if (decl_context == FIELD)
7604 error ("data member may not have variably modified type %qT", type);
7606 error ("parameter may not have variably modified type %qT", type);
7607 type = error_mark_node;
7610 if (explicitp == 1 || (explicitp && friendp))
7612 /* [dcl.fct.spec] The explicit specifier shall only be used in
7613 declarations of constructors within a class definition. */
7614 error ("only declarations of constructors can be %<explicit%>");
7618 if (storage_class == sc_mutable)
7620 if (decl_context != FIELD || friendp)
7622 error ("non-member %qs cannot be declared %<mutable%>", name);
7623 storage_class = sc_none;
7625 else if (decl_context == TYPENAME || declspecs->specs[(int)ds_typedef])
7627 error ("non-object member %qs cannot be declared %<mutable%>", name);
7628 storage_class = sc_none;
7630 else if (TREE_CODE (type) == FUNCTION_TYPE
7631 || TREE_CODE (type) == METHOD_TYPE)
7633 error ("function %qs cannot be declared %<mutable%>", name);
7634 storage_class = sc_none;
7638 error ("static %qs cannot be declared %<mutable%>", name);
7639 storage_class = sc_none;
7641 else if (type_quals & TYPE_QUAL_CONST)
7643 error ("const %qs cannot be declared %<mutable%>", name);
7644 storage_class = sc_none;
7648 /* If this is declaring a typedef name, return a TYPE_DECL. */
7649 if (declspecs->specs[(int)ds_typedef] && decl_context != TYPENAME)
7653 /* Note that the grammar rejects storage classes
7654 in typenames, fields or parameters. */
7655 if (current_lang_name == lang_name_java)
7656 TYPE_FOR_JAVA (type) = 1;
7658 if (decl_context == FIELD)
7660 if (constructor_name_p (unqualified_id, current_class_type))
7661 pedwarn ("ISO C++ forbids nested type %qD with same name "
7662 "as enclosing class",
7664 decl = build_lang_decl (TYPE_DECL, unqualified_id, type);
7668 decl = build_decl (TYPE_DECL, unqualified_id, type);
7669 if (in_namespace || ctype)
7670 error ("%Jtypedef name may not be a nested-name-specifier", decl);
7671 if (!current_function_decl)
7672 DECL_CONTEXT (decl) = FROB_CONTEXT (current_namespace);
7673 else if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (current_function_decl)
7674 || (DECL_MAYBE_IN_CHARGE_DESTRUCTOR_P
7675 (current_function_decl)))
7676 /* The TYPE_DECL is "abstract" because there will be
7677 clones of this constructor/destructor, and there will
7678 be copies of this TYPE_DECL generated in those
7680 DECL_ABSTRACT (decl) = 1;
7683 /* If the user declares "typedef struct {...} foo" then the
7684 struct will have an anonymous name. Fill that name in now.
7685 Nothing can refer to it, so nothing needs know about the name
7687 if (type != error_mark_node
7690 && TREE_CODE (TYPE_NAME (type)) == TYPE_DECL
7691 && TYPE_ANONYMOUS_P (type)
7692 /* Don't do this if there are attributes. */
7693 && (!attrlist || !*attrlist)
7694 && cp_type_quals (type) == TYPE_UNQUALIFIED)
7696 tree oldname = TYPE_NAME (type);
7699 /* Replace the anonymous name with the real name everywhere. */
7700 for (t = TYPE_MAIN_VARIANT (type); t; t = TYPE_NEXT_VARIANT (t))
7701 if (TYPE_NAME (t) == oldname)
7702 TYPE_NAME (t) = decl;
7704 if (TYPE_LANG_SPECIFIC (type))
7705 TYPE_WAS_ANONYMOUS (type) = 1;
7707 /* If this is a typedef within a template class, the nested
7708 type is a (non-primary) template. The name for the
7709 template needs updating as well. */
7710 if (TYPE_LANG_SPECIFIC (type) && CLASSTYPE_TEMPLATE_INFO (type))
7711 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type))
7712 = TYPE_IDENTIFIER (type);
7714 /* FIXME remangle member functions; member functions of a
7715 type with external linkage have external linkage. */
7720 if (ctype == NULL_TREE)
7722 if (TREE_CODE (type) != METHOD_TYPE)
7723 error ("%Jinvalid type qualifier for non-member function type",
7726 ctype = TYPE_METHOD_BASETYPE (type);
7728 if (ctype != NULL_TREE)
7729 grok_method_quals (ctype, decl, quals);
7733 || (typedef_decl && C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl)))
7734 C_TYPEDEF_EXPLICITLY_SIGNED (decl) = 1;
7736 bad_specifiers (decl, "type", virtualp, quals != TYPE_UNQUALIFIED,
7737 inlinep, friendp, raises != NULL_TREE);
7742 /* Detect the case of an array type of unspecified size
7743 which came, as such, direct from a typedef name.
7744 We must copy the type, so that the array's domain can be
7745 individually set by the object's initializer. */
7747 if (type && typedef_type
7748 && TREE_CODE (type) == ARRAY_TYPE && !TYPE_DOMAIN (type)
7749 && TYPE_MAIN_VARIANT (type) == TYPE_MAIN_VARIANT (typedef_type))
7750 type = build_cplus_array_type (TREE_TYPE (type), NULL_TREE);
7752 /* Detect where we're using a typedef of function type to declare a
7753 function. PARMS will not be set, so we must create it now. */
7755 if (type == typedef_type && TREE_CODE (type) == FUNCTION_TYPE)
7757 tree decls = NULL_TREE;
7760 for (args = TYPE_ARG_TYPES (type); args; args = TREE_CHAIN (args))
7762 tree decl = cp_build_parm_decl (NULL_TREE, TREE_VALUE (args));
7764 TREE_CHAIN (decl) = decls;
7768 parms = nreverse (decls);
7771 /* If this is a type name (such as, in a cast or sizeof),
7772 compute the type and return it now. */
7774 if (decl_context == TYPENAME)
7776 /* Note that the grammar rejects storage classes
7777 in typenames, fields or parameters. */
7778 if (type_quals != TYPE_UNQUALIFIED)
7779 type_quals = TYPE_UNQUALIFIED;
7781 /* Special case: "friend class foo" looks like a TYPENAME context. */
7784 if (type_quals != TYPE_UNQUALIFIED)
7786 error ("type qualifiers specified for friend class declaration");
7787 type_quals = TYPE_UNQUALIFIED;
7791 error ("%<inline%> specified for friend class declaration");
7797 /* Don't allow friend declaration without a class-key. */
7798 if (TREE_CODE (type) == TEMPLATE_TYPE_PARM)
7799 pedwarn ("template parameters cannot be friends");
7800 else if (TREE_CODE (type) == TYPENAME_TYPE)
7801 pedwarn ("friend declaration requires class-key, "
7802 "i.e. %<friend class %T::%D%>",
7803 TYPE_CONTEXT (type), TYPENAME_TYPE_FULLNAME (type));
7805 pedwarn ("friend declaration requires class-key, "
7806 "i.e. %<friend %#T%>",
7810 /* Only try to do this stuff if we didn't already give up. */
7811 if (type != integer_type_node)
7813 /* A friendly class? */
7814 if (current_class_type)
7815 make_friend_class (current_class_type, TYPE_MAIN_VARIANT (type),
7818 error ("trying to make class %qT a friend of global scope",
7821 type = void_type_node;
7826 if (ctype == NULL_TREE)
7828 if (TREE_CODE (type) != METHOD_TYPE)
7829 error ("invalid qualifiers on non-member function type");
7831 ctype = TYPE_METHOD_BASETYPE (type);
7835 tree dummy = build_decl (TYPE_DECL, unqualified_id, type);
7836 grok_method_quals (ctype, dummy, quals);
7837 type = TREE_TYPE (dummy);
7843 else if (unqualified_id == NULL_TREE && decl_context != PARM
7844 && decl_context != CATCHPARM
7845 && TREE_CODE (type) != UNION_TYPE
7848 error ("abstract declarator %qT used as declaration", type);
7849 return error_mark_node;
7852 /* Only functions may be declared using an operator-function-id. */
7854 && IDENTIFIER_OPNAME_P (unqualified_id)
7855 && TREE_CODE (type) != FUNCTION_TYPE
7856 && TREE_CODE (type) != METHOD_TYPE)
7858 error ("declaration of %qD as non-function", unqualified_id);
7859 return error_mark_node;
7862 /* We don't check parameter types here because we can emit a better
7863 error message later. */
7864 if (decl_context != PARM)
7865 type = check_var_type (unqualified_id, type);
7867 /* Now create the decl, which may be a VAR_DECL, a PARM_DECL
7868 or a FUNCTION_DECL, depending on DECL_CONTEXT and TYPE. */
7870 if (decl_context == PARM || decl_context == CATCHPARM)
7872 if (ctype || in_namespace)
7873 error ("cannot use %<::%> in parameter declaration");
7875 /* A parameter declared as an array of T is really a pointer to T.
7876 One declared as a function is really a pointer to a function.
7877 One declared as a member is really a pointer to member. */
7879 if (TREE_CODE (type) == ARRAY_TYPE)
7881 /* Transfer const-ness of array into that of type pointed to. */
7882 type = build_pointer_type (TREE_TYPE (type));
7883 type_quals = TYPE_UNQUALIFIED;
7885 else if (TREE_CODE (type) == FUNCTION_TYPE)
7886 type = build_pointer_type (type);
7892 if (decl_context == PARM)
7894 decl = cp_build_parm_decl (unqualified_id, type);
7896 bad_specifiers (decl, "parameter", virtualp, quals != TYPE_UNQUALIFIED,
7897 inlinep, friendp, raises != NULL_TREE);
7899 else if (decl_context == FIELD)
7901 /* The C99 flexible array extension. */
7902 if (!staticp && TREE_CODE (type) == ARRAY_TYPE
7903 && TYPE_DOMAIN (type) == NULL_TREE)
7905 tree itype = compute_array_index_type (dname, integer_zero_node);
7906 type = build_cplus_array_type (TREE_TYPE (type), itype);
7909 if (type == error_mark_node)
7911 /* Happens when declaring arrays of sizes which
7912 are error_mark_node, for example. */
7915 else if (in_namespace && !friendp)
7917 /* Something like struct S { int N::j; }; */
7918 error ("invalid use of %<::%>");
7921 else if (TREE_CODE (type) == FUNCTION_TYPE)
7924 tree function_context;
7926 /* We catch the others as conflicts with the builtin
7928 if (friendp && unqualified_id == ridpointers[(int) RID_SIGNED])
7930 error ("function %qD cannot be declared friend",
7937 if (ctype == NULL_TREE)
7938 ctype = current_class_type;
7940 if (ctype == NULL_TREE)
7942 error ("can't make %qD into a method -- not in a class",
7944 return void_type_node;
7947 /* ``A union may [ ... ] not [ have ] virtual functions.''
7949 if (virtualp && TREE_CODE (ctype) == UNION_TYPE)
7951 error ("function %qD declared virtual inside a union",
7953 return void_type_node;
7956 if (NEW_DELETE_OPNAME_P (unqualified_id))
7960 error ("%qD cannot be declared virtual, since it "
7966 else if (staticp < 2)
7967 type = build_method_type_directly (ctype,
7969 TYPE_ARG_TYPES (type));
7972 /* Tell grokfndecl if it needs to set TREE_PUBLIC on the node. */
7973 function_context = (ctype != NULL_TREE) ?
7974 decl_function_context (TYPE_MAIN_DECL (ctype)) : NULL_TREE;
7975 publicp = (! friendp || ! staticp)
7976 && function_context == NULL_TREE;
7977 decl = grokfndecl (ctype, type,
7978 TREE_CODE (unqualified_id) != TEMPLATE_ID_EXPR
7979 ? unqualified_id : dname,
7982 virtualp, flags, quals, raises,
7983 friendp ? -1 : 0, friendp, publicp, inlinep,
7984 funcdef_flag, template_count, in_namespace, attrlist);
7985 if (decl == NULL_TREE)
7988 /* This clobbers the attrs stored in `decl' from `attrlist'. */
7989 /* The decl and setting of decl_attr is also turned off. */
7990 decl = build_decl_attribute_variant (decl, decl_attr);
7993 /* [class.conv.ctor]
7995 A constructor declared without the function-specifier
7996 explicit that can be called with a single parameter
7997 specifies a conversion from the type of its first
7998 parameter to the type of its class. Such a constructor
7999 is called a converting constructor. */
8001 DECL_NONCONVERTING_P (decl) = 1;
8002 else if (DECL_CONSTRUCTOR_P (decl))
8004 /* The constructor can be called with exactly one
8005 parameter if there is at least one parameter, and
8006 any subsequent parameters have default arguments.
8007 Ignore any compiler-added parms. */
8008 tree arg_types = FUNCTION_FIRST_USER_PARMTYPE (decl);
8010 if (arg_types == void_list_node
8012 && TREE_CHAIN (arg_types)
8013 && TREE_CHAIN (arg_types) != void_list_node
8014 && !TREE_PURPOSE (TREE_CHAIN (arg_types))))
8015 DECL_NONCONVERTING_P (decl) = 1;
8018 else if (TREE_CODE (type) == METHOD_TYPE)
8020 /* We only get here for friend declarations of
8021 members of other classes. */
8022 /* All method decls are public, so tell grokfndecl to set
8023 TREE_PUBLIC, also. */
8024 decl = grokfndecl (ctype, type,
8025 TREE_CODE (unqualified_id) != TEMPLATE_ID_EXPR
8026 ? unqualified_id : dname,
8029 virtualp, flags, quals, raises,
8030 friendp ? -1 : 0, friendp, 1, 0, funcdef_flag,
8031 template_count, in_namespace, attrlist);
8032 if (decl == NULL_TREE)
8035 else if (!staticp && !dependent_type_p (type)
8036 && !COMPLETE_TYPE_P (complete_type (type))
8037 && (TREE_CODE (type) != ARRAY_TYPE || initialized == 0))
8040 error ("field %qD has incomplete type", unqualified_id);
8042 error ("name %qT has incomplete type", type);
8044 /* If we're instantiating a template, tell them which
8045 instantiation made the field's type be incomplete. */
8046 if (current_class_type
8047 && TYPE_NAME (current_class_type)
8048 && IDENTIFIER_TEMPLATE (TYPE_IDENTIFIER (current_class_type))
8050 && declspecs->type == type)
8051 error (" in instantiation of template %qT",
8052 current_class_type);
8054 type = error_mark_node;
8061 error ("%qE is neither function nor member function; "
8062 "cannot be declared friend", unqualified_id);
8070 /* Friends are treated specially. */
8071 if (ctype == current_class_type)
8072 warning ("member functions are implicitly friends of their class");
8073 else if (decl && DECL_NAME (decl))
8075 if (template_class_depth (current_class_type) == 0)
8077 decl = check_explicit_specialization
8078 (unqualified_id, decl, template_count,
8079 2 * (funcdef_flag != 0) + 4);
8080 if (decl == error_mark_node)
8081 return error_mark_node;
8084 decl = do_friend (ctype, unqualified_id, decl,
8085 *attrlist, flags, quals, funcdef_flag);
8089 return void_type_node;
8092 /* Structure field. It may not be a function, except for C++. */
8094 if (decl == NULL_TREE)
8100 /* An attempt is being made to initialize a non-static
8101 member. But, from [class.mem]:
8103 4 A member-declarator can contain a
8104 constant-initializer only if it declares a static
8105 member (_class.static_) of integral or enumeration
8106 type, see _class.static.data_.
8108 This used to be relatively common practice, but
8109 the rest of the compiler does not correctly
8110 handle the initialization unless the member is
8111 static so we make it static below. */
8112 pedwarn ("ISO C++ forbids initialization of member %qD",
8114 pedwarn ("making %qD static", unqualified_id);
8118 if (uses_template_parms (type))
8119 /* We'll check at instantiation time. */
8121 else if (check_static_variable_definition (unqualified_id,
8123 /* If we just return the declaration, crashes
8124 will sometimes occur. We therefore return
8125 void_type_node, as if this was a friend
8126 declaration, to cause callers to completely
8127 ignore this declaration. */
8128 return void_type_node;
8133 /* C++ allows static class members. All other work
8134 for this is done by grokfield. */
8135 decl = build_lang_decl (VAR_DECL, unqualified_id, type);
8136 set_linkage_for_static_data_member (decl);
8137 /* Even if there is an in-class initialization, DECL
8138 is considered undefined until an out-of-class
8139 definition is provided. */
8140 DECL_EXTERNAL (decl) = 1;
8144 decl = build_decl (FIELD_DECL, unqualified_id, type);
8145 DECL_NONADDRESSABLE_P (decl) = bitfield;
8146 if (storage_class == sc_mutable)
8148 DECL_MUTABLE_P (decl) = 1;
8149 storage_class = sc_none;
8153 bad_specifiers (decl, "field", virtualp, quals != TYPE_UNQUALIFIED,
8154 inlinep, friendp, raises != NULL_TREE);
8157 else if (TREE_CODE (type) == FUNCTION_TYPE
8158 || TREE_CODE (type) == METHOD_TYPE)
8163 if (!unqualified_id)
8166 if (TREE_CODE (unqualified_id) == TEMPLATE_ID_EXPR)
8167 original_name = dname;
8169 original_name = unqualified_id;
8171 if (storage_class == sc_auto)
8172 error ("storage class %<auto%> invalid for function %qs", name);
8173 else if (storage_class == sc_register)
8174 error ("storage class %<register%> invalid for function %qs", name);
8176 error ("storage class %<__thread%> invalid for function %qs", name);
8178 /* Function declaration not at top level.
8179 Storage classes other than `extern' are not allowed
8180 and `extern' makes no difference. */
8181 if (! toplevel_bindings_p ()
8182 && (storage_class == sc_static
8183 || declspecs->specs[(int)ds_inline])
8186 if (storage_class == sc_static)
8187 pedwarn ("%<static%> specified invalid for function %qs "
8188 "declared out of global scope", name);
8190 pedwarn ("%<inline%> specifier invalid for function %qs "
8191 "declared out of global scope", name);
8194 if (ctype == NULL_TREE)
8198 error ("virtual non-class function %qs", name);
8202 else if (TREE_CODE (type) == FUNCTION_TYPE && staticp < 2
8203 && !NEW_DELETE_OPNAME_P (original_name))
8204 type = build_method_type_directly (ctype,
8206 TYPE_ARG_TYPES (type));
8208 /* Record presence of `static'. */
8209 publicp = (ctype != NULL_TREE
8210 || storage_class == sc_extern
8211 || storage_class != sc_static);
8213 decl = grokfndecl (ctype, type, original_name, parms, unqualified_id,
8214 virtualp, flags, quals, raises,
8216 publicp, inlinep, funcdef_flag,
8217 template_count, in_namespace, attrlist);
8218 if (decl == NULL_TREE)
8223 int invalid_static = 0;
8225 /* Don't allow a static member function in a class, and forbid
8226 declaring main to be static. */
8227 if (TREE_CODE (type) == METHOD_TYPE)
8229 pedwarn ("cannot declare member function %qD to have "
8230 "static linkage", decl);
8233 else if (current_function_decl)
8235 /* FIXME need arm citation */
8236 error ("cannot declare static function inside another function");
8243 storage_class = sc_none;
8249 /* It's a variable. */
8251 /* An uninitialized decl with `extern' is a reference. */
8252 decl = grokvardecl (type, unqualified_id,
8255 (type_quals & TYPE_QUAL_CONST) != 0,
8256 ctype ? ctype : in_namespace);
8257 bad_specifiers (decl, "variable", virtualp, quals != TYPE_UNQUALIFIED,
8258 inlinep, friendp, raises != NULL_TREE);
8262 DECL_CONTEXT (decl) = ctype;
8265 pedwarn ("%<static%> may not be used when defining "
8266 "(as opposed to declaring) a static data member");
8268 storage_class = sc_none;
8270 if (storage_class == sc_register && TREE_STATIC (decl))
8272 error ("static member %qD declared %<register%>", decl);
8273 storage_class = sc_none;
8275 if (storage_class == sc_extern && pedantic)
8277 pedwarn ("cannot explicitly declare member %q#D to have "
8280 storage_class = sc_none;
8285 /* Record `register' declaration for warnings on &
8286 and in case doing stupid register allocation. */
8288 if (storage_class == sc_register)
8289 DECL_REGISTER (decl) = 1;
8290 else if (storage_class == sc_extern)
8291 DECL_THIS_EXTERN (decl) = 1;
8292 else if (storage_class == sc_static)
8293 DECL_THIS_STATIC (decl) = 1;
8295 /* Record constancy and volatility. There's no need to do this
8296 when processing a template; we'll do this for the instantiated
8297 declaration based on the type of DECL. */
8298 if (!processing_template_decl)
8299 c_apply_type_quals_to_decl (type_quals, decl);
8305 /* Subroutine of start_function. Ensure that each of the parameter
8306 types (as listed in PARMS) is complete, as is required for a
8307 function definition. */
8310 require_complete_types_for_parms (tree parms)
8312 for (; parms; parms = TREE_CHAIN (parms))
8314 if (dependent_type_p (TREE_TYPE (parms)))
8316 if (VOID_TYPE_P (TREE_TYPE (parms)))
8317 /* grokparms will have already issued an error. */
8318 TREE_TYPE (parms) = error_mark_node;
8319 else if (complete_type_or_else (TREE_TYPE (parms), parms))
8321 layout_decl (parms, 0);
8322 DECL_ARG_TYPE (parms) = type_passed_as (TREE_TYPE (parms));
8327 /* Returns nonzero if T is a local variable. */
8330 local_variable_p (tree t)
8332 if ((TREE_CODE (t) == VAR_DECL
8333 /* A VAR_DECL with a context that is a _TYPE is a static data
8335 && !TYPE_P (CP_DECL_CONTEXT (t))
8336 /* Any other non-local variable must be at namespace scope. */
8337 && !DECL_NAMESPACE_SCOPE_P (t))
8338 || (TREE_CODE (t) == PARM_DECL))
8344 /* Returns nonzero if T is an automatic local variable or a label.
8345 (These are the declarations that need to be remapped when the code
8346 containing them is duplicated.) */
8349 nonstatic_local_decl_p (tree t)
8351 return ((local_variable_p (t) && !TREE_STATIC (t))
8352 || TREE_CODE (t) == LABEL_DECL
8353 || TREE_CODE (t) == RESULT_DECL);
8356 /* Like local_variable_p, but suitable for use as a tree-walking
8360 local_variable_p_walkfn (tree *tp, int *walk_subtrees,
8361 void *data ATTRIBUTE_UNUSED)
8363 if (local_variable_p (*tp) && !DECL_ARTIFICIAL (*tp))
8365 else if (TYPE_P (*tp))
8372 /* Check that ARG, which is a default-argument expression for a
8373 parameter DECL, is valid. Returns ARG, or ERROR_MARK_NODE, if
8374 something goes wrong. DECL may also be a _TYPE node, rather than a
8375 DECL, if there is no DECL available. */
8378 check_default_argument (tree decl, tree arg)
8383 if (TREE_CODE (arg) == DEFAULT_ARG)
8384 /* We get a DEFAULT_ARG when looking at an in-class declaration
8385 with a default argument. Ignore the argument for now; we'll
8386 deal with it after the class is complete. */
8389 if (processing_template_decl || uses_template_parms (arg))
8390 /* We don't do anything checking until instantiation-time. Note
8391 that there may be uninstantiated arguments even for an
8392 instantiated function, since default arguments are not
8393 instantiated until they are needed. */
8402 decl_type = TREE_TYPE (decl);
8404 if (arg == error_mark_node
8405 || decl == error_mark_node
8406 || TREE_TYPE (arg) == error_mark_node
8407 || decl_type == error_mark_node)
8408 /* Something already went wrong. There's no need to check
8410 return error_mark_node;
8412 /* [dcl.fct.default]
8414 A default argument expression is implicitly converted to the
8416 if (!TREE_TYPE (arg)
8417 || !can_convert_arg (decl_type, TREE_TYPE (arg), arg))
8420 error ("default argument for %q#D has type %qT",
8421 decl, TREE_TYPE (arg));
8423 error ("default argument for parameter of type %qT has type %qT",
8424 decl_type, TREE_TYPE (arg));
8426 return error_mark_node;
8429 /* [dcl.fct.default]
8431 Local variables shall not be used in default argument
8434 The keyword `this' shall not be used in a default argument of a
8436 var = walk_tree_without_duplicates (&arg, local_variable_p_walkfn,
8440 error ("default argument %qE uses local variable %qD", arg, var);
8441 return error_mark_node;
8448 /* Decode the list of parameter types for a function type.
8449 Given the list of things declared inside the parens,
8450 return a list of types.
8452 If this parameter does not end with an ellipsis, we append
8455 *PARMS is set to the chain of PARM_DECLs created. */
8458 grokparms (cp_parameter_declarator *first_parm, tree *parms)
8460 tree result = NULL_TREE;
8461 tree decls = NULL_TREE;
8462 int ellipsis = !first_parm || first_parm->ellipsis_p;
8463 cp_parameter_declarator *parm;
8466 for (parm = first_parm; parm != NULL; parm = parm->next)
8468 tree type = NULL_TREE;
8469 tree init = parm->default_argument;
8473 if (parm == no_parameters)
8476 attrs = parm->decl_specifiers.attributes;
8477 parm->decl_specifiers.attributes = NULL_TREE;
8478 decl = grokdeclarator (parm->declarator, &parm->decl_specifiers,
8479 PARM, init != NULL_TREE, &attrs);
8480 if (! decl || TREE_TYPE (decl) == error_mark_node)
8484 cplus_decl_attributes (&decl, attrs, 0);
8486 type = TREE_TYPE (decl);
8487 if (VOID_TYPE_P (type))
8489 if (same_type_p (type, void_type_node)
8490 && !DECL_NAME (decl) && !result && !parm->next && !ellipsis)
8491 /* this is a parmlist of `(void)', which is ok. */
8493 cxx_incomplete_type_error (decl, type);
8494 /* It's not a good idea to actually create parameters of
8495 type `void'; other parts of the compiler assume that a
8496 void type terminates the parameter list. */
8497 type = error_mark_node;
8498 TREE_TYPE (decl) = error_mark_node;
8501 if (type != error_mark_node)
8503 /* Top-level qualifiers on the parameters are
8504 ignored for function types. */
8505 type = cp_build_qualified_type (type, 0);
8506 if (TREE_CODE (type) == METHOD_TYPE)
8508 error ("parameter %qD invalidly declared method type", decl);
8509 type = build_pointer_type (type);
8510 TREE_TYPE (decl) = type;
8512 else if (abstract_virtuals_error (decl, type))
8513 any_error = 1; /* Seems like a good idea. */
8514 else if (POINTER_TYPE_P (type))
8516 /* [dcl.fct]/6, parameter types cannot contain pointers
8517 (references) to arrays of unknown bound. */
8518 tree t = TREE_TYPE (type);
8519 int ptr = TYPE_PTR_P (type);
8525 else if (TREE_CODE (t) != ARRAY_TYPE)
8527 else if (!TYPE_DOMAIN (t))
8531 if (TREE_CODE (t) == ARRAY_TYPE)
8532 error ("parameter %qD includes %s to array of unknown "
8534 decl, ptr ? "pointer" : "reference", t);
8537 if (!any_error && init)
8538 init = check_default_argument (decl, init);
8543 TREE_CHAIN (decl) = decls;
8545 result = tree_cons (init, type, result);
8547 decls = nreverse (decls);
8548 result = nreverse (result);
8550 result = chainon (result, void_list_node);
8557 /* D is a constructor or overloaded `operator='.
8559 Let T be the class in which D is declared. Then, this function
8562 -1 if D's is an ill-formed constructor or copy assignment operator
8563 whose first parameter is of type `T'.
8564 0 if D is not a copy constructor or copy assignment
8566 1 if D is a copy constructor or copy assignment operator whose
8567 first parameter is a reference to const qualified T.
8568 2 if D is a copy constructor or copy assignment operator whose
8569 first parameter is a reference to non-const qualified T.
8571 This function can be used as a predicate. Positive values indicate
8572 a copy constructor and nonzero values indicate a copy assignment
8582 gcc_assert (DECL_FUNCTION_MEMBER_P (d));
8584 if (DECL_TEMPLATE_INFO (d)
8585 && DECL_MEMBER_TEMPLATE_P (DECL_TI_TEMPLATE (d)))
8586 /* Instantiations of template member functions are never copy
8587 functions. Note that member functions of templated classes are
8588 represented as template functions internally, and we must
8589 accept those as copy functions. */
8592 args = FUNCTION_FIRST_USER_PARMTYPE (d);
8596 arg_type = TREE_VALUE (args);
8598 if (TYPE_MAIN_VARIANT (arg_type) == DECL_CONTEXT (d))
8600 /* Pass by value copy assignment operator. */
8603 else if (TREE_CODE (arg_type) == REFERENCE_TYPE
8604 && TYPE_MAIN_VARIANT (TREE_TYPE (arg_type)) == DECL_CONTEXT (d))
8606 if (CP_TYPE_CONST_P (TREE_TYPE (arg_type)))
8612 args = TREE_CHAIN (args);
8614 if (args && args != void_list_node && !TREE_PURPOSE (args))
8615 /* There are more non-optional args. */
8621 /* Remember any special properties of member function DECL. */
8623 void grok_special_member_properties (tree decl)
8625 if (!DECL_NONSTATIC_MEMBER_FUNCTION_P(decl))
8626 ; /* Not special. */
8627 else if (DECL_CONSTRUCTOR_P (decl))
8629 int ctor = copy_fn_p (decl);
8635 A non-template constructor for class X is a copy
8636 constructor if its first parameter is of type X&, const
8637 X&, volatile X& or const volatile X&, and either there
8638 are no other parameters or else all other parameters have
8639 default arguments. */
8640 TYPE_HAS_INIT_REF (DECL_CONTEXT (decl)) = 1;
8642 TYPE_HAS_CONST_INIT_REF (DECL_CONTEXT (decl)) = 1;
8644 else if (sufficient_parms_p (FUNCTION_FIRST_USER_PARMTYPE (decl)))
8645 TYPE_HAS_DEFAULT_CONSTRUCTOR (DECL_CONTEXT (decl)) = 1;
8647 else if (DECL_OVERLOADED_OPERATOR_P (decl) == NOP_EXPR)
8651 A non-template assignment operator for class X is a copy
8652 assignment operator if its parameter is of type X, X&, const
8653 X&, volatile X& or const volatile X&. */
8655 int assop = copy_fn_p (decl);
8659 TYPE_HAS_ASSIGN_REF (DECL_CONTEXT (decl)) = 1;
8661 TYPE_HAS_CONST_ASSIGN_REF (DECL_CONTEXT (decl)) = 1;
8666 /* Check a constructor DECL has the correct form. Complains
8667 if the class has a constructor of the form X(X). */
8670 grok_ctor_properties (tree ctype, tree decl)
8672 int ctor_parm = copy_fn_p (decl);
8678 A declaration of a constructor for a class X is ill-formed if
8679 its first parameter is of type (optionally cv-qualified) X
8680 and either there are no other parameters or else all other
8681 parameters have default arguments.
8683 We *don't* complain about member template instantiations that
8684 have this form, though; they can occur as we try to decide
8685 what constructor to use during overload resolution. Since
8686 overload resolution will never prefer such a constructor to
8687 the non-template copy constructor (which is either explicitly
8688 or implicitly defined), there's no need to worry about their
8689 existence. Theoretically, they should never even be
8690 instantiated, but that's hard to forestall. */
8691 error ("invalid constructor; you probably meant %<%T (const %T&)%>",
8699 /* An operator with this code is unary, but can also be binary. */
8702 ambi_op_p (enum tree_code code)
8704 return (code == INDIRECT_REF
8705 || code == ADDR_EXPR
8706 || code == CONVERT_EXPR
8707 || code == NEGATE_EXPR
8708 || code == PREINCREMENT_EXPR
8709 || code == PREDECREMENT_EXPR);
8712 /* An operator with this name can only be unary. */
8715 unary_op_p (enum tree_code code)
8717 return (code == TRUTH_NOT_EXPR
8718 || code == BIT_NOT_EXPR
8719 || code == COMPONENT_REF
8720 || code == TYPE_EXPR);
8723 /* DECL is a declaration for an overloaded operator. Returns true if
8724 the declaration is valid; false otherwise. If COMPLAIN is true,
8725 errors are issued for invalid declarations. */
8728 grok_op_properties (tree decl, int friendp, bool complain)
8730 tree argtypes = TYPE_ARG_TYPES (TREE_TYPE (decl));
8732 int methodp = (TREE_CODE (TREE_TYPE (decl)) == METHOD_TYPE);
8733 tree name = DECL_NAME (decl);
8734 enum tree_code operator_code;
8738 /* Assume that the declaration is valid. */
8741 /* Count the number of arguments. */
8742 for (argtype = argtypes, arity = 0;
8743 argtype && argtype != void_list_node;
8744 argtype = TREE_CHAIN (argtype))
8747 if (current_class_type == NULL_TREE)
8750 if (DECL_CONV_FN_P (decl))
8751 operator_code = TYPE_EXPR;
8755 #define DEF_OPERATOR(NAME, CODE, MANGLING, ARITY, ASSN_P) \
8756 if (ansi_opname (CODE) == name) \
8758 operator_code = (CODE); \
8761 else if (ansi_assopname (CODE) == name) \
8763 operator_code = (CODE); \
8764 DECL_ASSIGNMENT_OPERATOR_P (decl) = 1; \
8768 #include "operators.def"
8774 gcc_assert (operator_code != LAST_CPLUS_TREE_CODE);
8775 SET_OVERLOADED_OPERATOR_CODE (decl, operator_code);
8779 switch (operator_code)
8782 TYPE_HAS_NEW_OPERATOR (current_class_type) = 1;
8786 TYPE_GETS_DELETE (current_class_type) |= 1;
8790 TYPE_HAS_ARRAY_NEW_OPERATOR (current_class_type) = 1;
8793 case VEC_DELETE_EXPR:
8794 TYPE_GETS_DELETE (current_class_type) |= 2;
8802 /* [basic.std.dynamic.allocation]/1:
8804 A program is ill-formed if an allocation function is declared
8805 in a namespace scope other than global scope or declared static
8808 The same also holds true for deallocation functions. */
8809 if (operator_code == NEW_EXPR || operator_code == VEC_NEW_EXPR
8810 || operator_code == DELETE_EXPR || operator_code == VEC_DELETE_EXPR)
8812 if (DECL_NAMESPACE_SCOPE_P (decl))
8814 if (CP_DECL_CONTEXT (decl) != global_namespace)
8815 error ("%qD may not be declared within a namespace", decl);
8816 else if (!TREE_PUBLIC (decl))
8817 error ("%qD may not be declared as static", decl);
8821 if (operator_code == NEW_EXPR || operator_code == VEC_NEW_EXPR)
8822 TREE_TYPE (decl) = coerce_new_type (TREE_TYPE (decl));
8823 else if (operator_code == DELETE_EXPR || operator_code == VEC_DELETE_EXPR)
8824 TREE_TYPE (decl) = coerce_delete_type (TREE_TYPE (decl));
8827 /* An operator function must either be a non-static member function
8828 or have at least one parameter of a class, a reference to a class,
8829 an enumeration, or a reference to an enumeration. 13.4.0.6 */
8830 if (! methodp || DECL_STATIC_FUNCTION_P (decl))
8832 if (operator_code == TYPE_EXPR
8833 || operator_code == CALL_EXPR
8834 || operator_code == COMPONENT_REF
8835 || operator_code == ARRAY_REF
8836 || operator_code == NOP_EXPR)
8837 error ("%qD must be a nonstatic member function", decl);
8842 if (DECL_STATIC_FUNCTION_P (decl))
8843 error ("%qD must be either a non-static member "
8844 "function or a non-member function", decl);
8846 for (p = argtypes; p && p != void_list_node; p = TREE_CHAIN (p))
8848 tree arg = non_reference (TREE_VALUE (p));
8849 /* IS_AGGR_TYPE, rather than CLASS_TYPE_P, is used
8850 because these checks are performed even on
8851 template functions. */
8852 if (IS_AGGR_TYPE (arg) || TREE_CODE (arg) == ENUMERAL_TYPE)
8856 if (!p || p == void_list_node)
8861 error ("%qD must have an argument of class or "
8869 /* There are no restrictions on the arguments to an overloaded
8871 if (operator_code == CALL_EXPR)
8874 if (IDENTIFIER_TYPENAME_P (name) && ! DECL_TEMPLATE_INFO (decl))
8876 tree t = TREE_TYPE (name);
8879 int ref = (TREE_CODE (t) == REFERENCE_TYPE);
8880 const char *what = 0;
8883 t = TYPE_MAIN_VARIANT (TREE_TYPE (t));
8885 if (TREE_CODE (t) == VOID_TYPE)
8887 else if (t == current_class_type)
8888 what = "the same type";
8889 /* Don't force t to be complete here. */
8890 else if (IS_AGGR_TYPE (t)
8891 && COMPLETE_TYPE_P (t)
8892 && DERIVED_FROM_P (t, current_class_type))
8893 what = "a base class";
8895 if (what && warn_conversion)
8896 warning ("conversion to %s%s will never use a type "
8897 "conversion operator",
8898 ref ? "a reference to " : "", what);
8901 if (operator_code == COND_EXPR)
8904 error ("ISO C++ prohibits overloading operator ?:");
8906 else if (ambi_op_p (operator_code))
8909 /* We pick the one-argument operator codes by default, so
8910 we don't have to change anything. */
8912 else if (arity == 2)
8914 /* If we thought this was a unary operator, we now know
8915 it to be a binary operator. */
8916 switch (operator_code)
8919 operator_code = MULT_EXPR;
8923 operator_code = BIT_AND_EXPR;
8927 operator_code = PLUS_EXPR;
8931 operator_code = MINUS_EXPR;
8934 case PREINCREMENT_EXPR:
8935 operator_code = POSTINCREMENT_EXPR;
8938 case PREDECREMENT_EXPR:
8939 operator_code = POSTDECREMENT_EXPR;
8946 SET_OVERLOADED_OPERATOR_CODE (decl, operator_code);
8948 if ((operator_code == POSTINCREMENT_EXPR
8949 || operator_code == POSTDECREMENT_EXPR)
8950 && ! processing_template_decl
8951 && ! same_type_p (TREE_VALUE (TREE_CHAIN (argtypes)), integer_type_node))
8954 error ("postfix %qD must take %<int%> as its argument",
8958 ("postfix %qD must take %<int%> as its second argument",
8965 error ("%qD must take either zero or one argument", decl);
8967 error ("%qD must take either one or two arguments", decl);
8970 /* More Effective C++ rule 6. */
8972 && (operator_code == POSTINCREMENT_EXPR
8973 || operator_code == POSTDECREMENT_EXPR
8974 || operator_code == PREINCREMENT_EXPR
8975 || operator_code == PREDECREMENT_EXPR))
8977 tree arg = TREE_VALUE (argtypes);
8978 tree ret = TREE_TYPE (TREE_TYPE (decl));
8979 if (methodp || TREE_CODE (arg) == REFERENCE_TYPE)
8980 arg = TREE_TYPE (arg);
8981 arg = TYPE_MAIN_VARIANT (arg);
8982 if (operator_code == PREINCREMENT_EXPR
8983 || operator_code == PREDECREMENT_EXPR)
8985 if (TREE_CODE (ret) != REFERENCE_TYPE
8986 || !same_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (ret)),
8988 warning ("prefix %qD should return %qT", decl,
8989 build_reference_type (arg));
8993 if (!same_type_p (TYPE_MAIN_VARIANT (ret), arg))
8994 warning ("postfix %qD should return %qT", decl, arg);
8998 else if (unary_op_p (operator_code))
9003 error ("%qD must take %<void%>", decl);
9005 error ("%qD must take exactly one argument", decl);
9008 else /* if (binary_op_p (operator_code)) */
9013 error ("%qD must take exactly one argument", decl);
9015 error ("%qD must take exactly two arguments", decl);
9018 /* More Effective C++ rule 7. */
9020 && (operator_code == TRUTH_ANDIF_EXPR
9021 || operator_code == TRUTH_ORIF_EXPR
9022 || operator_code == COMPOUND_EXPR))
9023 warning ("user-defined %qD always evaluates both arguments",
9027 /* Effective C++ rule 23. */
9030 && !DECL_ASSIGNMENT_OPERATOR_P (decl)
9031 && (operator_code == PLUS_EXPR
9032 || operator_code == MINUS_EXPR
9033 || operator_code == TRUNC_DIV_EXPR
9034 || operator_code == MULT_EXPR
9035 || operator_code == TRUNC_MOD_EXPR)
9036 && TREE_CODE (TREE_TYPE (TREE_TYPE (decl))) == REFERENCE_TYPE)
9037 warning ("%qD should return by value", decl);
9040 for (; argtypes && argtypes != void_list_node;
9041 argtypes = TREE_CHAIN (argtypes))
9042 if (TREE_PURPOSE (argtypes))
9044 TREE_PURPOSE (argtypes) = NULL_TREE;
9045 if (operator_code == POSTINCREMENT_EXPR
9046 || operator_code == POSTDECREMENT_EXPR)
9049 pedwarn ("%qD cannot have default arguments", decl);
9052 error ("%qD cannot have default arguments", decl);
9060 /* Return a string giving the keyword associate with CODE. */
9063 tag_name (enum tag_types code)
9082 /* Name lookup in an elaborated-type-specifier (after the keyword
9083 indicated by TAG_CODE) has found the TYPE_DECL DECL. If the
9084 elaborated-type-specifier is invalid, issue a diagnostic and return
9085 error_mark_node; otherwise, return the *_TYPE to which it referred.
9086 If ALLOW_TEMPLATE_P is true, TYPE may be a class template. */
9089 check_elaborated_type_specifier (enum tag_types tag_code,
9091 bool allow_template_p)
9097 struct S { struct S *p; };
9099 name lookup will find the TYPE_DECL for the implicit "S::S"
9100 typedef. Adjust for that here. */
9101 if (DECL_SELF_REFERENCE_P (decl))
9102 decl = TYPE_NAME (TREE_TYPE (decl));
9104 type = TREE_TYPE (decl);
9106 /* Check TEMPLATE_TYPE_PARM first because DECL_IMPLICIT_TYPEDEF_P
9107 is false for this case as well. */
9108 if (TREE_CODE (type) == TEMPLATE_TYPE_PARM)
9110 error ("using template type parameter %qT after %qs",
9111 type, tag_name (tag_code));
9112 return error_mark_node;
9116 If the identifier resolves to a typedef-name or a template
9117 type-parameter, the elaborated-type-specifier is ill-formed.
9119 In other words, the only legitimate declaration to use in the
9120 elaborated type specifier is the implicit typedef created when
9121 the type is declared. */
9122 else if (!DECL_IMPLICIT_TYPEDEF_P (decl)
9123 && tag_code != typename_type)
9125 error ("using typedef-name %qD after %qs", decl, tag_name (tag_code));
9126 cp_error_at ("%qD has a previous declaration here", decl);
9127 return error_mark_node;
9129 else if (TREE_CODE (type) != RECORD_TYPE
9130 && TREE_CODE (type) != UNION_TYPE
9131 && tag_code != enum_type
9132 && tag_code != typename_type)
9134 error ("%qT referred to as %qs", type, tag_name (tag_code));
9135 cp_error_at ("%qT has a previous declaration here", type);
9136 return error_mark_node;
9138 else if (TREE_CODE (type) != ENUMERAL_TYPE
9139 && tag_code == enum_type
9140 && tag_code != typename_type)
9142 error ("%qT referred to as enum", type);
9143 cp_error_at ("%qT has a previous declaration here", type);
9144 return error_mark_node;
9146 else if (!allow_template_p
9147 && TREE_CODE (type) == RECORD_TYPE
9148 && CLASSTYPE_IS_TEMPLATE (type))
9150 /* If a class template appears as elaborated type specifier
9151 without a template header such as:
9153 template <class T> class C {};
9154 void f(class C); // No template header here
9156 then the required template argument is missing. */
9158 error ("template argument required for %<%s %T%>",
9159 tag_name (tag_code),
9160 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type)));
9161 return error_mark_node;
9167 /* Lookup NAME in elaborate type specifier in scope according to
9168 SCOPE and issue diagnostics if necessary.
9169 Return *_TYPE node upon success, NULL_TREE when the NAME is not
9170 found, and ERROR_MARK_NODE for type error. */
9173 lookup_and_check_tag (enum tag_types tag_code, tree name,
9174 tag_scope scope, bool template_header_p)
9178 if (scope == ts_global)
9179 decl = lookup_name (name, 2);
9181 decl = lookup_type_scope (name, scope);
9183 if (decl && DECL_CLASS_TEMPLATE_P (decl))
9184 decl = DECL_TEMPLATE_RESULT (decl);
9186 if (decl && TREE_CODE (decl) == TYPE_DECL)
9188 /* Look for invalid nested type:
9192 if (scope == ts_current && DECL_SELF_REFERENCE_P (decl))
9194 error ("%qD has the same name as the class in which it is "
9197 return error_mark_node;
9200 /* Two cases we need to consider when deciding if a class
9201 template is allowed as an elaborated type specifier:
9202 1. It is a self reference to its own class.
9203 2. It comes with a template header.
9207 template <class T> class C {
9208 class C *c1; // DECL_SELF_REFERENCE_P is true
9211 template <class U> class C; // template_header_p is true
9212 template <class T> class C<T>::D {
9213 class C *c2; // DECL_SELF_REFERENCE_P is true
9216 t = check_elaborated_type_specifier (tag_code,
9219 | DECL_SELF_REFERENCE_P (decl));
9226 /* Get the struct, enum or union (TAG_CODE says which) with tag NAME.
9227 Define the tag as a forward-reference if it is not defined.
9229 If a declaration is given, process it here, and report an error if
9230 multiple declarations are not identical.
9232 SCOPE is TS_CURRENT when this is also a definition. Only look in
9233 the current frame for the name (since C++ allows new names in any
9234 scope.) It is TS_WITHIN_ENCLOSING_NON_CLASS if this is a friend
9235 declaration. Only look beginning from the current scope outward up
9236 till the nearest non-class scope. Otherwise it is TS_GLOBAL.
9238 TEMPLATE_HEADER_P is true when this declaration is preceded by
9239 a set of template parameters. */
9242 xref_tag (enum tag_types tag_code, tree name,
9243 tag_scope scope, bool template_header_p)
9245 enum tree_code code;
9247 tree context = NULL_TREE;
9249 timevar_push (TV_NAME_LOOKUP);
9251 gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE);
9263 code = ENUMERAL_TYPE;
9269 /* In case of anonymous name, xref_tag is only called to
9270 make type node and push name. Name lookup is not required. */
9271 if (ANON_AGGRNAME_P (name))
9274 t = lookup_and_check_tag (tag_code, name,
9275 scope, template_header_p);
9277 if (t == error_mark_node)
9278 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
9280 if (scope != ts_current && t && current_class_type
9281 && template_class_depth (current_class_type)
9282 && template_header_p)
9284 /* Since SCOPE is not TS_CURRENT, we are not looking at a
9285 definition of this tag. Since, in addition, we are currently
9286 processing a (member) template declaration of a template
9287 class, we must be very careful; consider:
9294 { template <class V>
9295 friend struct S1; };
9297 Here, the S2::S1 declaration should not be confused with the
9298 outer declaration. In particular, the inner version should
9299 have a template parameter of level 2, not level 1. This
9300 would be particularly important if the member declaration
9303 template <class V = U> friend struct S1;
9305 say, when we should tsubst into `U' when instantiating
9306 S2. On the other hand, when presented with:
9316 we must find the inner binding eventually. We
9317 accomplish this by making sure that the new type we
9318 create to represent this declaration has the right
9320 context = TYPE_CONTEXT (t);
9326 /* If no such tag is yet defined, create a forward-reference node
9327 and record it as the "definition".
9328 When a real declaration of this type is found,
9329 the forward-reference will be altered into a real type. */
9330 if (code == ENUMERAL_TYPE)
9332 error ("use of enum %q#D without previous declaration", name);
9333 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
9337 t = make_aggr_type (code);
9338 TYPE_CONTEXT (t) = context;
9339 /* pushtag only cares whether SCOPE is zero or not. */
9340 t = pushtag (name, t, scope != ts_current);
9345 if (template_header_p && IS_AGGR_TYPE (t))
9346 redeclare_class_template (t, current_template_parms);
9347 else if (!processing_template_decl
9349 && CLASSTYPE_IS_TEMPLATE (t))
9351 error ("redeclaration of %qT as a non-template", t);
9352 t = error_mark_node;
9356 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, t);
9360 xref_tag_from_type (tree old, tree id, tag_scope scope)
9362 enum tag_types tag_kind;
9364 if (TREE_CODE (old) == RECORD_TYPE)
9365 tag_kind = (CLASSTYPE_DECLARED_CLASS (old) ? class_type : record_type);
9367 tag_kind = union_type;
9369 if (id == NULL_TREE)
9370 id = TYPE_IDENTIFIER (old);
9372 return xref_tag (tag_kind, id, scope, false);
9375 /* Create the binfo hierarchy for REF with (possibly NULL) base list
9376 BASE_LIST. For each element on BASE_LIST the TREE_PURPOSE is an
9377 access_* node, and the TREE_VALUE is the type of the base-class.
9378 Non-NULL TREE_TYPE indicates virtual inheritance. */
9381 xref_basetypes (tree ref, tree base_list)
9384 tree binfo, base_binfo;
9385 unsigned max_vbases = 0; /* Maximum direct & indirect virtual bases. */
9386 unsigned max_bases = 0; /* Maximum direct bases. */
9388 tree default_access;
9389 tree igo_prev; /* Track Inheritance Graph Order. */
9391 if (ref == error_mark_node)
9394 /* The base of a derived class is private by default, all others are
9396 default_access = (TREE_CODE (ref) == RECORD_TYPE
9397 && CLASSTYPE_DECLARED_CLASS (ref)
9398 ? access_private_node : access_public_node);
9400 /* First, make sure that any templates in base-classes are
9401 instantiated. This ensures that if we call ourselves recursively
9402 we do not get confused about which classes are marked and which
9407 tree basetype = TREE_VALUE (*basep);
9409 if (!(processing_template_decl && uses_template_parms (basetype))
9410 && !complete_type_or_else (basetype, NULL))
9411 /* An incomplete type. Remove it from the list. */
9412 *basep = TREE_CHAIN (*basep);
9416 if (TREE_TYPE (*basep))
9418 if (CLASS_TYPE_P (basetype))
9419 max_vbases += VEC_length (tree, CLASSTYPE_VBASECLASSES (basetype));
9420 basep = &TREE_CHAIN (*basep);
9424 TYPE_MARKED_P (ref) = 1;
9426 /* The binfo slot should be empty, unless this is an (ill-formed)
9428 gcc_assert (!TYPE_BINFO (ref) || TYPE_SIZE (ref));
9429 gcc_assert (TYPE_MAIN_VARIANT (ref) == ref);
9431 binfo = make_tree_binfo (max_bases);
9433 TYPE_BINFO (ref) = binfo;
9434 BINFO_OFFSET (binfo) = size_zero_node;
9435 BINFO_TYPE (binfo) = ref;
9439 BINFO_BASE_ACCESSES (binfo) = VEC_alloc (tree, max_bases);
9440 /* An aggregate cannot have baseclasses. */
9441 CLASSTYPE_NON_AGGREGATE (ref) = 1;
9443 if (TREE_CODE (ref) == UNION_TYPE)
9444 error ("derived union %qT invalid", ref);
9449 if (TYPE_FOR_JAVA (ref))
9450 error ("Java class %qT cannot have multiple bases", ref);
9455 CLASSTYPE_VBASECLASSES (ref) = VEC_alloc (tree, max_vbases);
9457 if (TYPE_FOR_JAVA (ref))
9458 error ("Java class %qT cannot have virtual bases", ref);
9461 for (igo_prev = binfo; base_list; base_list = TREE_CHAIN (base_list))
9463 tree access = TREE_PURPOSE (base_list);
9464 int via_virtual = TREE_TYPE (base_list) != NULL_TREE;
9465 tree basetype = TREE_VALUE (base_list);
9467 if (access == access_default_node)
9468 access = default_access;
9470 if (TREE_CODE (basetype) == TYPE_DECL)
9471 basetype = TREE_TYPE (basetype);
9472 if (TREE_CODE (basetype) != RECORD_TYPE
9473 && TREE_CODE (basetype) != TYPENAME_TYPE
9474 && TREE_CODE (basetype) != TEMPLATE_TYPE_PARM
9475 && TREE_CODE (basetype) != BOUND_TEMPLATE_TEMPLATE_PARM)
9477 error ("base type %qT fails to be a struct or class type",
9482 if (TYPE_FOR_JAVA (basetype) && (current_lang_depth () == 0))
9483 TYPE_FOR_JAVA (ref) = 1;
9485 base_binfo = NULL_TREE;
9486 if (CLASS_TYPE_P (basetype) && !dependent_type_p (basetype))
9488 base_binfo = TYPE_BINFO (basetype);
9489 /* The original basetype could have been a typedef'd type. */
9490 basetype = BINFO_TYPE (base_binfo);
9492 /* Inherit flags from the base. */
9493 TYPE_HAS_NEW_OPERATOR (ref)
9494 |= TYPE_HAS_NEW_OPERATOR (basetype);
9495 TYPE_HAS_ARRAY_NEW_OPERATOR (ref)
9496 |= TYPE_HAS_ARRAY_NEW_OPERATOR (basetype);
9497 TYPE_GETS_DELETE (ref) |= TYPE_GETS_DELETE (basetype);
9498 TYPE_HAS_CONVERSION (ref) |= TYPE_HAS_CONVERSION (basetype);
9499 CLASSTYPE_DIAMOND_SHAPED_P (ref)
9500 |= CLASSTYPE_DIAMOND_SHAPED_P (basetype);
9501 CLASSTYPE_REPEATED_BASE_P (ref)
9502 |= CLASSTYPE_REPEATED_BASE_P (basetype);
9505 /* We must do this test after we've seen through a typedef
9507 if (TYPE_MARKED_P (basetype))
9509 if (basetype == ref)
9510 error ("recursive type %qT undefined", basetype);
9512 error ("duplicate base type %qT invalid", basetype);
9515 TYPE_MARKED_P (basetype) = 1;
9517 base_binfo = copy_binfo (base_binfo, basetype, ref,
9518 &igo_prev, via_virtual);
9519 if (!BINFO_INHERITANCE_CHAIN (base_binfo))
9520 BINFO_INHERITANCE_CHAIN (base_binfo) = binfo;
9522 BINFO_BASE_APPEND (binfo, base_binfo);
9523 BINFO_BASE_ACCESS_APPEND (binfo, access);
9526 if (VEC_space (tree, CLASSTYPE_VBASECLASSES (ref), 1))
9527 /* If we have space in the vbase vector, we must have shared at
9528 least one of them, and are therefore diamond shaped. */
9529 CLASSTYPE_DIAMOND_SHAPED_P (ref) = 1;
9531 /* Unmark all the types. */
9532 for (i = 0; BINFO_BASE_ITERATE (binfo, i, base_binfo); i++)
9533 TYPE_MARKED_P (BINFO_TYPE (base_binfo)) = 0;
9534 TYPE_MARKED_P (ref) = 0;
9536 /* Now see if we have a repeated base type. */
9537 if (!CLASSTYPE_REPEATED_BASE_P (ref))
9539 for (base_binfo = binfo; base_binfo;
9540 base_binfo = TREE_CHAIN (base_binfo))
9542 if (TYPE_MARKED_P (BINFO_TYPE (base_binfo)))
9544 CLASSTYPE_REPEATED_BASE_P (ref) = 1;
9547 TYPE_MARKED_P (BINFO_TYPE (base_binfo)) = 1;
9549 for (base_binfo = binfo; base_binfo;
9550 base_binfo = TREE_CHAIN (base_binfo))
9551 if (TYPE_MARKED_P (BINFO_TYPE (base_binfo)))
9552 TYPE_MARKED_P (BINFO_TYPE (base_binfo)) = 0;
9559 /* Begin compiling the definition of an enumeration type.
9561 Returns the type object, as yet incomplete.
9562 Also records info about it so that build_enumerator
9563 may be used to declare the individual values as they are read. */
9566 start_enum (tree name)
9570 gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE);
9572 /* If this is the real definition for a previous forward reference,
9573 fill in the contents in the same object that used to be the
9574 forward reference. */
9576 enumtype = lookup_and_check_tag (enum_type, name,
9577 /*tag_scope=*/ts_current,
9578 /*template_header_p=*/false);
9580 if (enumtype != NULL_TREE && TREE_CODE (enumtype) == ENUMERAL_TYPE)
9582 error ("multiple definition of %q#T", enumtype);
9583 error ("%Jprevious definition here", TYPE_MAIN_DECL (enumtype));
9584 /* Clear out TYPE_VALUES, and start again. */
9585 TYPE_VALUES (enumtype) = NULL_TREE;
9589 /* In case of error, make a dummy enum to allow parsing to
9591 if (enumtype == error_mark_node)
9592 name = make_anon_name ();
9594 enumtype = make_node (ENUMERAL_TYPE);
9595 enumtype = pushtag (name, enumtype, 0);
9601 /* After processing and defining all the values of an enumeration type,
9602 install their decls in the enumeration type and finish it off.
9603 ENUMTYPE is the type object and VALUES a list of name-value pairs. */
9606 finish_enum (tree enumtype)
9615 bool use_short_enum;
9619 integer_type_kind itk;
9620 tree underlying_type = NULL_TREE;
9622 /* We built up the VALUES in reverse order. */
9623 TYPE_VALUES (enumtype) = nreverse (TYPE_VALUES (enumtype));
9625 /* For an enum defined in a template, just set the type of the values;
9626 all further processing is postponed until the template is
9627 instantiated. We need to set the type so that tsubst of a CONST_DECL
9629 if (processing_template_decl)
9631 for (values = TYPE_VALUES (enumtype);
9633 values = TREE_CHAIN (values))
9634 TREE_TYPE (TREE_VALUE (values)) = enumtype;
9635 if (at_function_scope_p ())
9636 add_stmt (build_min (TAG_DEFN, enumtype));
9640 /* Determine the minimum and maximum values of the enumerators. */
9641 if (TYPE_VALUES (enumtype))
9643 minnode = maxnode = NULL_TREE;
9645 for (values = TYPE_VALUES (enumtype);
9647 values = TREE_CHAIN (values))
9649 decl = TREE_VALUE (values);
9651 /* [dcl.enum]: Following the closing brace of an enum-specifier,
9652 each enumerator has the type of its enumeration. Prior to the
9653 closing brace, the type of each enumerator is the type of its
9654 initializing value. */
9655 TREE_TYPE (decl) = enumtype;
9657 /* Update the minimum and maximum values, if appropriate. */
9658 value = DECL_INITIAL (decl);
9659 /* Figure out what the minimum and maximum values of the
9662 minnode = maxnode = value;
9663 else if (tree_int_cst_lt (maxnode, value))
9665 else if (tree_int_cst_lt (value, minnode))
9672 If the enumerator-list is empty, the underlying type is as if
9673 the enumeration had a single enumerator with value 0. */
9674 minnode = maxnode = integer_zero_node;
9676 /* Compute the number of bits require to represent all values of the
9677 enumeration. We must do this before the type of MINNODE and
9678 MAXNODE are transformed, since min_precision relies on the
9679 TREE_TYPE of the value it is passed. */
9680 unsignedp = tree_int_cst_sgn (minnode) >= 0;
9681 lowprec = min_precision (minnode, unsignedp);
9682 highprec = min_precision (maxnode, unsignedp);
9683 precision = MAX (lowprec, highprec);
9685 /* Determine the underlying type of the enumeration.
9689 The underlying type of an enumeration is an integral type that
9690 can represent all the enumerator values defined in the
9691 enumeration. It is implementation-defined which integral type is
9692 used as the underlying type for an enumeration except that the
9693 underlying type shall not be larger than int unless the value of
9694 an enumerator cannot fit in an int or unsigned int.
9696 We use "int" or an "unsigned int" as the underlying type, even if
9697 a smaller integral type would work, unless the user has
9698 explicitly requested that we use the smallest possible type. The
9699 user can request that for all enumerations with a command line
9700 flag, or for just one enumeration with an attribute. */
9702 use_short_enum = flag_short_enums
9703 || lookup_attribute ("packed", TYPE_ATTRIBUTES (enumtype));
9705 for (itk = (use_short_enum ? itk_char : itk_int);
9709 underlying_type = integer_types[itk];
9710 if (TYPE_PRECISION (underlying_type) >= precision
9711 && TYPE_UNSIGNED (underlying_type) == unsignedp)
9714 if (itk == itk_none)
9718 IF no integral type can represent all the enumerator values, the
9719 enumeration is ill-formed. */
9720 error ("no integral type can represent all of the enumerator values "
9721 "for %qT", enumtype);
9722 precision = TYPE_PRECISION (long_long_integer_type_node);
9723 underlying_type = integer_types[itk_unsigned_long_long];
9726 /* Compute the minium and maximum values for the type.
9730 For an enumeration where emin is the smallest enumerator and emax
9731 is the largest, the values of the enumeration are the values of the
9732 underlying type in the range bmin to bmax, where bmin and bmax are,
9733 respectively, the smallest and largest values of the smallest bit-
9734 field that can store emin and emax. */
9736 /* The middle-end currently assumes that types with TYPE_PRECISION
9737 narrower than their underlying type are suitably zero or sign
9738 extended to fill their mode. g++ doesn't make these guarantees.
9739 Until the middle-end can represent such paradoxical types, we
9740 set the TYPE_PRECISION to the width of the underlying type. */
9741 TYPE_PRECISION (enumtype) = TYPE_PRECISION (underlying_type);
9743 set_min_and_max_values_for_integral_type (enumtype, precision, unsignedp);
9747 The value of sizeof() applied to an enumeration type, an object
9748 of an enumeration type, or an enumerator, is the value of sizeof()
9749 applied to the underlying type. */
9750 TYPE_SIZE (enumtype) = TYPE_SIZE (underlying_type);
9751 TYPE_SIZE_UNIT (enumtype) = TYPE_SIZE_UNIT (underlying_type);
9752 TYPE_MODE (enumtype) = TYPE_MODE (underlying_type);
9753 TYPE_ALIGN (enumtype) = TYPE_ALIGN (underlying_type);
9754 TYPE_USER_ALIGN (enumtype) = TYPE_USER_ALIGN (underlying_type);
9755 TYPE_UNSIGNED (enumtype) = TYPE_UNSIGNED (underlying_type);
9757 /* Convert each of the enumerators to the type of the underlying
9758 type of the enumeration. */
9759 for (values = TYPE_VALUES (enumtype); values; values = TREE_CHAIN (values))
9761 decl = TREE_VALUE (values);
9762 value = perform_implicit_conversion (underlying_type,
9763 DECL_INITIAL (decl));
9765 /* Do not clobber shared ints. */
9766 value = copy_node (value);
9768 TREE_TYPE (value) = enumtype;
9769 DECL_INITIAL (decl) = value;
9770 TREE_VALUE (values) = value;
9773 /* Fix up all variant types of this enum type. */
9774 for (t = TYPE_MAIN_VARIANT (enumtype); t; t = TYPE_NEXT_VARIANT (t))
9776 TYPE_VALUES (t) = TYPE_VALUES (enumtype);
9777 TYPE_MIN_VALUE (t) = TYPE_MIN_VALUE (enumtype);
9778 TYPE_MAX_VALUE (t) = TYPE_MAX_VALUE (enumtype);
9779 TYPE_SIZE (t) = TYPE_SIZE (enumtype);
9780 TYPE_SIZE_UNIT (t) = TYPE_SIZE_UNIT (enumtype);
9781 TYPE_MODE (t) = TYPE_MODE (enumtype);
9782 TYPE_PRECISION (t) = TYPE_PRECISION (enumtype);
9783 TYPE_ALIGN (t) = TYPE_ALIGN (enumtype);
9784 TYPE_USER_ALIGN (t) = TYPE_USER_ALIGN (enumtype);
9785 TYPE_UNSIGNED (t) = TYPE_UNSIGNED (enumtype);
9788 /* Finish debugging output for this type. */
9789 rest_of_type_compilation (enumtype, namespace_bindings_p ());
9792 /* Build and install a CONST_DECL for an enumeration constant of the
9793 enumeration type ENUMTYPE whose NAME and VALUE (if any) are provided.
9794 Assignment of sequential values by default is handled here. */
9797 build_enumerator (tree name, tree value, tree enumtype)
9803 /* Remove no-op casts from the value. */
9805 STRIP_TYPE_NOPS (value);
9807 if (! processing_template_decl)
9809 /* Validate and default VALUE. */
9810 if (value != NULL_TREE)
9812 value = integral_constant_value (value);
9814 if (TREE_CODE (value) == INTEGER_CST)
9816 value = perform_integral_promotions (value);
9817 constant_expression_warning (value);
9821 error ("enumerator value for %qD not integer constant", name);
9826 /* Default based on previous value. */
9827 if (value == NULL_TREE)
9829 if (TYPE_VALUES (enumtype))
9832 unsigned HOST_WIDE_INT lo;
9836 /* The next value is the previous value plus one. We can
9837 safely assume that the previous value is an INTEGER_CST.
9838 add_double doesn't know the type of the target expression,
9839 so we must check with int_fits_type_p as well. */
9840 prev_value = DECL_INITIAL (TREE_VALUE (TYPE_VALUES (enumtype)));
9841 overflowed = add_double (TREE_INT_CST_LOW (prev_value),
9842 TREE_INT_CST_HIGH (prev_value),
9844 value = build_int_cst_wide (TREE_TYPE (prev_value), lo, hi);
9845 overflowed |= !int_fits_type_p (value, TREE_TYPE (prev_value));
9848 error ("overflow in enumeration values at %qD", name);
9851 value = integer_zero_node;
9854 /* Remove no-op casts from the value. */
9855 STRIP_TYPE_NOPS (value);
9858 /* C++ associates enums with global, function, or class declarations. */
9859 context = current_scope ();
9861 /* Build the actual enumeration constant. Note that the enumeration
9862 constants have the type of their initializers until the
9863 enumeration is complete:
9867 Following the closing brace of an enum-specifier, each enumer-
9868 ator has the type of its enumeration. Prior to the closing
9869 brace, the type of each enumerator is the type of its
9872 In finish_enum we will reset the type. Of course, if we're
9873 processing a template, there may be no value. */
9874 type = value ? TREE_TYPE (value) : NULL_TREE;
9876 if (context && context == current_class_type)
9877 /* This enum declaration is local to the class. We need the full
9878 lang_decl so that we can record DECL_CLASS_CONTEXT, for example. */
9879 decl = build_lang_decl (CONST_DECL, name, type);
9881 /* It's a global enum, or it's local to a function. (Note local to
9882 a function could mean local to a class method. */
9883 decl = build_decl (CONST_DECL, name, type);
9885 DECL_CONTEXT (decl) = FROB_CONTEXT (context);
9886 TREE_CONSTANT (decl) = 1;
9887 TREE_INVARIANT (decl) = 1;
9888 TREE_READONLY (decl) = 1;
9889 DECL_INITIAL (decl) = value;
9891 if (context && context == current_class_type)
9892 /* In something like `struct S { enum E { i = 7 }; };' we put `i'
9893 on the TYPE_FIELDS list for `S'. (That's so that you can say
9894 things like `S::i' later.) */
9895 finish_member_declaration (decl);
9899 /* Add this enumeration constant to the list for this type. */
9900 TYPE_VALUES (enumtype) = tree_cons (name, decl, TYPE_VALUES (enumtype));
9904 /* We're defining DECL. Make sure that it's type is OK. */
9907 check_function_type (tree decl, tree current_function_parms)
9909 tree fntype = TREE_TYPE (decl);
9910 tree return_type = complete_type (TREE_TYPE (fntype));
9912 /* In a function definition, arg types must be complete. */
9913 require_complete_types_for_parms (current_function_parms);
9915 if (dependent_type_p (return_type))
9917 if (!COMPLETE_OR_VOID_TYPE_P (return_type))
9919 error ("return type %q#T is incomplete", TREE_TYPE (fntype));
9921 /* Make it return void instead, but don't change the
9922 type of the DECL_RESULT, in case we have a named return value. */
9923 if (TREE_CODE (fntype) == METHOD_TYPE)
9925 tree ctype = TREE_TYPE (TREE_VALUE (TYPE_ARG_TYPES (fntype)));
9927 = build_method_type_directly (ctype,
9929 FUNCTION_ARG_CHAIN (decl));
9933 = build_function_type (void_type_node,
9934 TYPE_ARG_TYPES (TREE_TYPE (decl)));
9936 = build_exception_variant (fntype,
9937 TYPE_RAISES_EXCEPTIONS (fntype));
9940 abstract_virtuals_error (decl, TREE_TYPE (fntype));
9943 /* Create the FUNCTION_DECL for a function definition.
9944 DECLSPECS and DECLARATOR are the parts of the declaration;
9945 they describe the function's name and the type it returns,
9946 but twisted together in a fashion that parallels the syntax of C.
9948 FLAGS is a bitwise or of SF_PRE_PARSED (indicating that the
9949 DECLARATOR is really the DECL for the function we are about to
9950 process and that DECLSPECS should be ignored), SF_INCLASS_INLINE
9951 indicating that the function is an inline defined in-class.
9953 This function creates a binding context for the function body
9954 as well as setting up the FUNCTION_DECL in current_function_decl.
9956 For C++, we must first check whether that datum makes any sense.
9957 For example, "class A local_a(1,2);" means that variable local_a
9958 is an aggregate of type A, which should have a constructor
9959 applied to it with the argument list [1, 2]. */
9962 start_preparsed_function (tree decl1, tree attrs, int flags)
9964 tree ctype = NULL_TREE;
9967 int doing_friend = 0;
9968 struct cp_binding_level *bl;
9969 tree current_function_parms;
9970 struct c_fileinfo *finfo = get_fileinfo (lbasename (input_filename));
9973 gcc_assert (TREE_CODE (TREE_VALUE (void_list_node)) == VOID_TYPE);
9974 gcc_assert (TREE_CHAIN (void_list_node) == NULL_TREE);
9976 fntype = TREE_TYPE (decl1);
9977 if (TREE_CODE (fntype) == METHOD_TYPE)
9978 ctype = TYPE_METHOD_BASETYPE (fntype);
9980 /* ISO C++ 11.4/5. A friend function defined in a class is in
9981 the (lexical) scope of the class in which it is defined. */
9982 if (!ctype && DECL_FRIEND_P (decl1))
9984 ctype = DECL_FRIEND_CONTEXT (decl1);
9986 /* CTYPE could be null here if we're dealing with a template;
9987 for example, `inline friend float foo()' inside a template
9988 will have no CTYPE set. */
9989 if (ctype && TREE_CODE (ctype) != RECORD_TYPE)
9995 if (DECL_DECLARED_INLINE_P (decl1)
9996 && lookup_attribute ("noinline", attrs))
9997 warning ("%Jinline function %qD given attribute noinline", decl1, decl1);
9999 if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (decl1))
10000 /* This is a constructor, we must ensure that any default args
10001 introduced by this definition are propagated to the clones
10002 now. The clones are used directly in overload resolution. */
10003 adjust_clone_args (decl1);
10005 /* Sometimes we don't notice that a function is a static member, and
10006 build a METHOD_TYPE for it. Fix that up now. */
10007 if (ctype != NULL_TREE && DECL_STATIC_FUNCTION_P (decl1)
10008 && TREE_CODE (TREE_TYPE (decl1)) == METHOD_TYPE)
10010 revert_static_member_fn (decl1);
10014 /* Set up current_class_type, and enter the scope of the class, if
10017 push_nested_class (ctype);
10018 else if (DECL_STATIC_FUNCTION_P (decl1))
10019 push_nested_class (DECL_CONTEXT (decl1));
10021 /* Now that we have entered the scope of the class, we must restore
10022 the bindings for any template parameters surrounding DECL1, if it
10023 is an inline member template. (Order is important; consider the
10024 case where a template parameter has the same name as a field of
10025 the class.) It is not until after this point that
10026 PROCESSING_TEMPLATE_DECL is guaranteed to be set up correctly. */
10027 if (flags & SF_INCLASS_INLINE)
10028 maybe_begin_member_template_processing (decl1);
10030 /* Effective C++ rule 15. */
10032 && DECL_OVERLOADED_OPERATOR_P (decl1) == NOP_EXPR
10033 && TREE_CODE (TREE_TYPE (fntype)) == VOID_TYPE)
10034 warning ("%<operator=%> should return a reference to %<*this%>");
10036 /* Make the init_value nonzero so pushdecl knows this is not tentative.
10037 error_mark_node is replaced below (in poplevel) with the BLOCK. */
10038 if (!DECL_INITIAL (decl1))
10039 DECL_INITIAL (decl1) = error_mark_node;
10041 /* This function exists in static storage.
10042 (This does not mean `static' in the C sense!) */
10043 TREE_STATIC (decl1) = 1;
10045 /* We must call push_template_decl after current_class_type is set
10046 up. (If we are processing inline definitions after exiting a
10047 class scope, current_class_type will be NULL_TREE until set above
10048 by push_nested_class.) */
10049 if (processing_template_decl)
10050 decl1 = push_template_decl (decl1);
10052 /* We are now in the scope of the function being defined. */
10053 current_function_decl = decl1;
10055 /* Save the parm names or decls from this function's declarator
10056 where store_parm_decls will find them. */
10057 current_function_parms = DECL_ARGUMENTS (decl1);
10059 /* Make sure the parameter and return types are reasonable. When
10060 you declare a function, these types can be incomplete, but they
10061 must be complete when you define the function. */
10062 check_function_type (decl1, current_function_parms);
10064 /* Build the return declaration for the function. */
10065 restype = TREE_TYPE (fntype);
10066 /* Promote the value to int before returning it. */
10067 if (c_promoting_integer_type_p (restype))
10068 restype = type_promotes_to (restype);
10069 if (DECL_RESULT (decl1) == NULL_TREE)
10073 resdecl = build_decl (RESULT_DECL, 0, TYPE_MAIN_VARIANT (restype));
10074 DECL_ARTIFICIAL (resdecl) = 1;
10075 DECL_IGNORED_P (resdecl) = 1;
10076 DECL_RESULT (decl1) = resdecl;
10078 c_apply_type_quals_to_decl (cp_type_quals (restype), resdecl);
10081 /* Initialize RTL machinery. We cannot do this until
10082 CURRENT_FUNCTION_DECL and DECL_RESULT are set up. We do this
10083 even when processing a template; this is how we get
10084 CFUN set up, and our per-function variables initialized.
10085 FIXME factor out the non-RTL stuff. */
10086 bl = current_binding_level;
10087 allocate_struct_function (decl1);
10088 current_binding_level = bl;
10090 /* Even though we're inside a function body, we still don't want to
10091 call expand_expr to calculate the size of a variable-sized array.
10092 We haven't necessarily assigned RTL to all variables yet, so it's
10093 not safe to try to expand expressions involving them. */
10094 cfun->x_dont_save_pending_sizes_p = 1;
10096 /* Start the statement-tree, start the tree now. */
10097 DECL_SAVED_TREE (decl1) = push_stmt_list ();
10099 /* Let the user know we're compiling this function. */
10100 announce_function (decl1);
10102 /* Record the decl so that the function name is defined.
10103 If we already have a decl for this name, and it is a FUNCTION_DECL,
10104 use the old decl. */
10105 if (!processing_template_decl && !(flags & SF_PRE_PARSED))
10107 /* A specialization is not used to guide overload resolution. */
10108 if (!DECL_FUNCTION_MEMBER_P (decl1)
10109 && !(DECL_USE_TEMPLATE (decl1) &&
10110 PRIMARY_TEMPLATE_P (DECL_TI_TEMPLATE (decl1))))
10112 tree olddecl = pushdecl (decl1);
10114 if (olddecl == error_mark_node)
10115 /* If something went wrong when registering the declaration,
10116 use DECL1; we have to have a FUNCTION_DECL to use when
10117 parsing the body of the function. */
10120 /* Otherwise, OLDDECL is either a previous declaration of
10121 the same function or DECL1 itself. */
10126 /* We need to set the DECL_CONTEXT. */
10127 if (!DECL_CONTEXT (decl1) && DECL_TEMPLATE_INFO (decl1))
10128 DECL_CONTEXT (decl1) = DECL_CONTEXT (DECL_TI_TEMPLATE (decl1));
10129 /* And make sure we have enough default args. */
10130 check_default_args (decl1);
10132 fntype = TREE_TYPE (decl1);
10135 /* Determine the ELF visibility attribute for the function. We must
10136 not do this before calling "pushdecl", as we must allow
10137 "duplicate_decls" to merge any attributes appropriately. */
10138 if (!DECL_CLONED_FUNCTION_P (decl1))
10139 determine_visibility (decl1);
10141 /* Reset these in case the call to pushdecl changed them. */
10142 current_function_decl = decl1;
10143 cfun->decl = decl1;
10145 /* If we are (erroneously) defining a function that we have already
10146 defined before, wipe out what we knew before. */
10147 if (!DECL_PENDING_INLINE_P (decl1))
10148 DECL_SAVED_FUNCTION_DATA (decl1) = NULL;
10150 if (ctype && !doing_friend && !DECL_STATIC_FUNCTION_P (decl1))
10152 /* We know that this was set up by `grokclassfn'. We do not
10153 wait until `store_parm_decls', since evil parse errors may
10154 never get us to that point. Here we keep the consistency
10155 between `current_class_type' and `current_class_ptr'. */
10156 tree t = DECL_ARGUMENTS (decl1);
10158 gcc_assert (t != NULL_TREE && TREE_CODE (t) == PARM_DECL);
10159 gcc_assert (TREE_CODE (TREE_TYPE (t)) == POINTER_TYPE);
10161 cp_function_chain->x_current_class_ref
10162 = build_indirect_ref (t, NULL);
10163 cp_function_chain->x_current_class_ptr = t;
10165 /* Constructors and destructors need to know whether they're "in
10166 charge" of initializing virtual base classes. */
10167 t = TREE_CHAIN (t);
10168 if (DECL_HAS_IN_CHARGE_PARM_P (decl1))
10170 current_in_charge_parm = t;
10171 t = TREE_CHAIN (t);
10173 if (DECL_HAS_VTT_PARM_P (decl1))
10175 gcc_assert (DECL_NAME (t) == vtt_parm_identifier);
10176 current_vtt_parm = t;
10180 if (DECL_INTERFACE_KNOWN (decl1))
10182 tree ctx = decl_function_context (decl1);
10184 if (DECL_NOT_REALLY_EXTERN (decl1))
10185 DECL_EXTERNAL (decl1) = 0;
10187 if (ctx != NULL_TREE && DECL_DECLARED_INLINE_P (ctx)
10188 && TREE_PUBLIC (ctx))
10189 /* This is a function in a local class in an extern inline
10191 comdat_linkage (decl1);
10193 /* If this function belongs to an interface, it is public.
10194 If it belongs to someone else's interface, it is also external.
10195 This only affects inlines and template instantiations. */
10196 else if (finfo->interface_unknown == 0
10197 && ! DECL_TEMPLATE_INSTANTIATION (decl1))
10199 if (DECL_DECLARED_INLINE_P (decl1)
10200 || DECL_TEMPLATE_INSTANTIATION (decl1)
10201 || processing_template_decl)
10203 DECL_EXTERNAL (decl1)
10204 = (finfo->interface_only
10205 || (DECL_DECLARED_INLINE_P (decl1)
10206 && ! flag_implement_inlines
10207 && !DECL_VINDEX (decl1)));
10209 /* For WIN32 we also want to put these in linkonce sections. */
10210 maybe_make_one_only (decl1);
10213 DECL_EXTERNAL (decl1) = 0;
10214 DECL_NOT_REALLY_EXTERN (decl1) = 0;
10215 DECL_INTERFACE_KNOWN (decl1) = 1;
10216 /* If this function is in an interface implemented in this file,
10217 make sure that the backend knows to emit this function
10219 if (!DECL_EXTERNAL (decl1))
10220 mark_needed (decl1);
10222 else if (finfo->interface_unknown && finfo->interface_only
10223 && ! DECL_TEMPLATE_INSTANTIATION (decl1))
10225 /* If MULTIPLE_SYMBOL_SPACES is defined and we saw a #pragma
10226 interface, we will have both finfo->interface_unknown and
10227 finfo->interface_only set. In that case, we don't want to
10228 use the normal heuristics because someone will supply a
10229 #pragma implementation elsewhere, and deducing it here would
10230 produce a conflict. */
10231 comdat_linkage (decl1);
10232 DECL_EXTERNAL (decl1) = 0;
10233 DECL_INTERFACE_KNOWN (decl1) = 1;
10234 DECL_DEFER_OUTPUT (decl1) = 1;
10238 /* This is a definition, not a reference.
10239 So clear DECL_EXTERNAL. */
10240 DECL_EXTERNAL (decl1) = 0;
10242 if ((DECL_DECLARED_INLINE_P (decl1)
10243 || DECL_TEMPLATE_INSTANTIATION (decl1))
10244 && ! DECL_INTERFACE_KNOWN (decl1)
10245 /* Don't try to defer nested functions for now. */
10246 && ! decl_function_context (decl1))
10247 DECL_DEFER_OUTPUT (decl1) = 1;
10249 DECL_INTERFACE_KNOWN (decl1) = 1;
10252 begin_scope (sk_function_parms, decl1);
10256 if (DECL_DESTRUCTOR_P (decl1)
10257 || (DECL_CONSTRUCTOR_P (decl1)
10258 && targetm.cxx.cdtor_returns_this ()))
10260 cdtor_label = build_decl (LABEL_DECL, NULL_TREE, NULL_TREE);
10261 DECL_CONTEXT (cdtor_label) = current_function_decl;
10264 start_fname_decls ();
10266 store_parm_decls (current_function_parms);
10270 /* Like start_preparsed_function, except that instead of a
10271 FUNCTION_DECL, this function takes DECLSPECS and DECLARATOR.
10273 Returns 1 on success. If the DECLARATOR is not suitable for a function
10274 (it defines a datum instead), we return 0, which tells
10275 yyparse to report a parse error. */
10278 start_function (cp_decl_specifier_seq *declspecs,
10279 const cp_declarator *declarator,
10284 if (have_extern_spec)
10286 declspecs->storage_class = sc_extern;
10287 /* This should only be done once on the outermost decl. */
10288 have_extern_spec = false;
10291 decl1 = grokdeclarator (declarator, declspecs, FUNCDEF, 1, &attrs);
10292 /* If the declarator is not suitable for a function definition,
10293 cause a syntax error. */
10294 if (decl1 == NULL_TREE || TREE_CODE (decl1) != FUNCTION_DECL)
10297 /* If #pragma weak was used, mark the decl weak now. */
10298 if (global_scope_p (current_binding_level))
10299 maybe_apply_pragma_weak (decl1);
10301 if (DECL_MAIN_P (decl1))
10302 /* main must return int. grokfndecl should have corrected it
10303 (and issued a diagnostic) if the user got it wrong. */
10304 gcc_assert (same_type_p (TREE_TYPE (TREE_TYPE (decl1)),
10305 integer_type_node));
10307 start_preparsed_function (decl1, attrs, /*flags=*/SF_DEFAULT);
10312 /* Store the parameter declarations into the current function declaration.
10313 This is called after parsing the parameter declarations, before
10314 digesting the body of the function.
10316 Also install to binding contour return value identifier, if any. */
10319 store_parm_decls (tree current_function_parms)
10321 tree fndecl = current_function_decl;
10324 /* This is a chain of any other decls that came in among the parm
10325 declarations. If a parm is declared with enum {foo, bar} x;
10326 then CONST_DECLs for foo and bar are put here. */
10327 tree nonparms = NULL_TREE;
10329 if (current_function_parms)
10331 /* This case is when the function was defined with an ANSI prototype.
10332 The parms already have decls, so we need not do anything here
10333 except record them as in effect
10334 and complain if any redundant old-style parm decls were written. */
10336 tree specparms = current_function_parms;
10339 /* Must clear this because it might contain TYPE_DECLs declared
10341 current_binding_level->names = NULL;
10343 /* If we're doing semantic analysis, then we'll call pushdecl
10344 for each of these. We must do them in reverse order so that
10345 they end in the correct forward order. */
10346 specparms = nreverse (specparms);
10348 for (parm = specparms; parm; parm = next)
10350 next = TREE_CHAIN (parm);
10351 if (TREE_CODE (parm) == PARM_DECL)
10353 if (DECL_NAME (parm) == NULL_TREE
10354 || TREE_CODE (parm) != VOID_TYPE)
10357 error ("parameter %qD declared void", parm);
10361 /* If we find an enum constant or a type tag,
10362 put it aside for the moment. */
10363 TREE_CHAIN (parm) = NULL_TREE;
10364 nonparms = chainon (nonparms, parm);
10368 /* Get the decls in their original chain order and record in the
10369 function. This is all and only the PARM_DECLs that were
10370 pushed into scope by the loop above. */
10371 DECL_ARGUMENTS (fndecl) = getdecls ();
10374 DECL_ARGUMENTS (fndecl) = NULL_TREE;
10376 /* Now store the final chain of decls for the arguments
10377 as the decl-chain of the current lexical scope.
10378 Put the enumerators in as well, at the front so that
10379 DECL_ARGUMENTS is not modified. */
10380 current_binding_level->names = chainon (nonparms, DECL_ARGUMENTS (fndecl));
10382 /* For a cloned function, we've already got all the code we need;
10383 there's no need to add any extra bits. */
10384 if (!DECL_CLONED_FUNCTION_P (fndecl))
10386 /* Do the starting of the exception specifications, if we have any. */
10387 if (flag_exceptions && !processing_template_decl
10388 && flag_enforce_eh_specs
10389 && TYPE_RAISES_EXCEPTIONS (TREE_TYPE (current_function_decl)))
10390 current_eh_spec_block = begin_eh_spec_block ();
10395 /* We have finished doing semantic analysis on DECL, but have not yet
10396 generated RTL for its body. Save away our current state, so that
10397 when we want to generate RTL later we know what to do. */
10400 save_function_data (tree decl)
10402 struct language_function *f;
10404 /* Save the language-specific per-function data so that we can
10405 get it back when we really expand this function. */
10406 gcc_assert (!DECL_PENDING_INLINE_P (decl));
10409 f = GGC_NEW (struct language_function);
10410 memcpy (f, cp_function_chain, sizeof (struct language_function));
10411 DECL_SAVED_FUNCTION_DATA (decl) = f;
10413 /* Clear out the bits we don't need. */
10414 f->base.x_stmt_tree.x_cur_stmt_list = NULL_TREE;
10415 f->x_named_label_uses = NULL;
10416 f->bindings = NULL;
10417 f->x_local_names = NULL;
10421 /* Set the return value of the constructor (if present). */
10424 finish_constructor_body (void)
10429 if (targetm.cxx.cdtor_returns_this ())
10431 /* Any return from a constructor will end up here. */
10432 add_stmt (build_stmt (LABEL_EXPR, cdtor_label));
10434 val = DECL_ARGUMENTS (current_function_decl);
10435 val = build2 (MODIFY_EXPR, TREE_TYPE (val),
10436 DECL_RESULT (current_function_decl), val);
10437 /* Return the address of the object. */
10438 exprstmt = build_stmt (RETURN_EXPR, val);
10439 add_stmt (exprstmt);
10443 /* Do all the processing for the beginning of a destructor; set up the
10444 vtable pointers and cleanups for bases and members. */
10447 begin_destructor_body (void)
10450 tree compound_stmt;
10452 /* If the dtor is empty, and we know there is not any possible
10453 way we could use any vtable entries, before they are possibly
10454 set by a base class dtor, we don't have to setup the vtables,
10455 as we know that any base class dtor will set up any vtables
10456 it needs. We avoid MI, because one base class dtor can do a
10457 virtual dispatch to an overridden function that would need to
10458 have a non-related vtable set up, we cannot avoid setting up
10459 vtables in that case. We could change this to see if there
10460 is just one vtable.
10462 ??? In the destructor for a class, the vtables are set
10463 appropriately for that class. There will be no non-related
10464 vtables. jason 2001-12-11. */
10465 if_stmt = begin_if_stmt ();
10467 /* If it is not safe to avoid setting up the vtables, then
10468 someone will change the condition to be boolean_true_node.
10469 (Actually, for now, we do not have code to set the condition
10470 appropriately, so we just assume that we always need to
10471 initialize the vtables.) */
10472 finish_if_stmt_cond (boolean_true_node, if_stmt);
10474 compound_stmt = begin_compound_stmt (0);
10476 /* Make all virtual function table pointers in non-virtual base
10477 classes point to CURRENT_CLASS_TYPE's virtual function
10479 initialize_vtbl_ptrs (current_class_ptr);
10481 finish_compound_stmt (compound_stmt);
10482 finish_then_clause (if_stmt);
10483 finish_if_stmt (if_stmt);
10485 /* And insert cleanups for our bases and members so that they
10486 will be properly destroyed if we throw. */
10487 push_base_cleanups ();
10490 /* At the end of every destructor we generate code to delete the object if
10491 necessary. Do that now. */
10494 finish_destructor_body (void)
10498 /* Any return from a destructor will end up here; that way all base
10499 and member cleanups will be run when the function returns. */
10500 add_stmt (build_stmt (LABEL_EXPR, cdtor_label));
10502 /* In a virtual destructor, we must call delete. */
10503 if (DECL_VIRTUAL_P (current_function_decl))
10506 tree virtual_size = cxx_sizeof (current_class_type);
10510 At the point of definition of a virtual destructor (including
10511 an implicit definition), non-placement operator delete shall
10512 be looked up in the scope of the destructor's class and if
10513 found shall be accessible and unambiguous. */
10514 exprstmt = build_op_delete_call
10515 (DELETE_EXPR, current_class_ptr, virtual_size,
10516 /*global_p=*/false, NULL_TREE);
10518 if_stmt = begin_if_stmt ();
10519 finish_if_stmt_cond (build2 (BIT_AND_EXPR, integer_type_node,
10520 current_in_charge_parm,
10523 finish_expr_stmt (exprstmt);
10524 finish_then_clause (if_stmt);
10525 finish_if_stmt (if_stmt);
10528 if (targetm.cxx.cdtor_returns_this ())
10532 val = DECL_ARGUMENTS (current_function_decl);
10533 val = build2 (MODIFY_EXPR, TREE_TYPE (val),
10534 DECL_RESULT (current_function_decl), val);
10535 /* Return the address of the object. */
10536 exprstmt = build_stmt (RETURN_EXPR, val);
10537 add_stmt (exprstmt);
10541 /* Do the necessary processing for the beginning of a function body, which
10542 in this case includes member-initializers, but not the catch clauses of
10543 a function-try-block. Currently, this means opening a binding level
10544 for the member-initializers (in a ctor) and member cleanups (in a dtor).
10545 In other functions, this isn't necessary, but it doesn't hurt. */
10548 begin_function_body (void)
10552 if (processing_template_decl)
10553 /* Do nothing now. */;
10555 /* Always keep the BLOCK node associated with the outermost pair of
10556 curly braces of a function. These are needed for correct
10557 operation of dwarfout.c. */
10558 keep_next_level (true);
10560 stmt = begin_compound_stmt (BCS_FN_BODY);
10562 if (processing_template_decl)
10563 /* Do nothing now. */;
10564 else if (DECL_DESTRUCTOR_P (current_function_decl))
10565 begin_destructor_body ();
10570 /* Do the processing for the end of a function body. Currently, this means
10571 closing out the cleanups for fully-constructed bases and members, and in
10572 the case of the destructor, deleting the object if desired. Again, this
10573 is only meaningful for [cd]tors, since they are the only functions where
10574 there is a significant distinction between the main body and any
10575 function catch clauses. Handling, say, main() return semantics here
10576 would be wrong, as flowing off the end of a function catch clause for
10577 main() would also need to return 0. */
10580 finish_function_body (tree compstmt)
10582 /* Close the block. */
10583 finish_compound_stmt (compstmt);
10585 if (processing_template_decl)
10586 /* Do nothing now. */;
10587 else if (DECL_CONSTRUCTOR_P (current_function_decl))
10588 finish_constructor_body ();
10589 else if (DECL_DESTRUCTOR_P (current_function_decl))
10590 finish_destructor_body ();
10593 /* Finish up a function declaration and compile that function
10594 all the way to assembler language output. The free the storage
10595 for the function definition.
10597 FLAGS is a bitwise or of the following values:
10599 We just finished processing the body of an in-class inline
10600 function definition. (This processing will have taken place
10601 after the class definition is complete.) */
10604 finish_function (int flags)
10606 tree fndecl = current_function_decl;
10607 tree fntype, ctype = NULL_TREE;
10608 int inclass_inline = (flags & 2) != 0;
10611 /* When we get some parse errors, we can end up without a
10612 current_function_decl, so cope. */
10613 if (fndecl == NULL_TREE)
10614 return error_mark_node;
10616 if (DECL_NONSTATIC_MEMBER_FUNCTION_P (fndecl)
10617 && DECL_VIRTUAL_P (fndecl)
10618 && !processing_template_decl)
10620 tree fnclass = DECL_CONTEXT (fndecl);
10621 if (fndecl == CLASSTYPE_KEY_METHOD (fnclass))
10622 keyed_classes = tree_cons (NULL_TREE, fnclass, keyed_classes);
10625 nested = function_depth > 1;
10626 fntype = TREE_TYPE (fndecl);
10628 /* TREE_READONLY (fndecl) = 1;
10629 This caused &foo to be of type ptr-to-const-function
10630 which then got a warning when stored in a ptr-to-function variable. */
10632 gcc_assert (building_stmt_tree ());
10634 /* For a cloned function, we've already got all the code we need;
10635 there's no need to add any extra bits. */
10636 if (!DECL_CLONED_FUNCTION_P (fndecl))
10638 if (DECL_MAIN_P (current_function_decl))
10642 /* Make it so that `main' always returns 0 by default (or
10645 stmt = finish_return_stmt (integer_one_node);
10647 stmt = finish_return_stmt (integer_zero_node);
10649 /* Hack. We don't want the middle-end to warn that this
10650 return is unreachable, so put the statement on the
10652 annotate_with_file_line (stmt, input_filename, 0);
10655 /* Finish dealing with exception specifiers. */
10656 if (flag_exceptions && !processing_template_decl
10657 && flag_enforce_eh_specs
10658 && TYPE_RAISES_EXCEPTIONS (TREE_TYPE (current_function_decl)))
10659 finish_eh_spec_block (TYPE_RAISES_EXCEPTIONS
10660 (TREE_TYPE (current_function_decl)),
10661 current_eh_spec_block);
10664 /* If we're saving up tree structure, tie off the function now. */
10665 DECL_SAVED_TREE (fndecl) = pop_stmt_list (DECL_SAVED_TREE (fndecl));
10667 finish_fname_decls ();
10669 /* If this function can't throw any exceptions, remember that. */
10670 if (!processing_template_decl
10671 && !cp_function_chain->can_throw
10672 && !flag_non_call_exceptions)
10673 TREE_NOTHROW (fndecl) = 1;
10675 /* This must come after expand_function_end because cleanups might
10676 have declarations (from inline functions) that need to go into
10677 this function's blocks. */
10679 /* If the current binding level isn't the outermost binding level
10680 for this function, either there is a bug, or we have experienced
10681 syntax errors and the statement tree is malformed. */
10682 if (current_binding_level->kind != sk_function_parms)
10684 /* Make sure we have already experienced errors. */
10685 gcc_assert (errorcount);
10687 /* Throw away the broken statement tree and extra binding
10689 DECL_SAVED_TREE (fndecl) = alloc_stmt_list ();
10691 while (current_binding_level->kind != sk_function_parms)
10693 if (current_binding_level->kind == sk_class)
10694 pop_nested_class ();
10696 poplevel (0, 0, 0);
10699 poplevel (1, 0, 1);
10701 /* Statements should always be full-expressions at the outermost set
10702 of curly braces for a function. */
10703 gcc_assert (stmts_are_full_exprs_p ());
10705 /* Set up the named return value optimization, if we can. Candidate
10706 variables are selected in check_return_value. */
10707 if (current_function_return_value)
10709 tree r = current_function_return_value;
10712 if (r != error_mark_node
10713 /* This is only worth doing for fns that return in memory--and
10714 simpler, since we don't have to worry about promoted modes. */
10715 && aggregate_value_p (TREE_TYPE (TREE_TYPE (fndecl)), fndecl)
10716 /* Only allow this for variables declared in the outer scope of
10717 the function so we know that their lifetime always ends with a
10718 return; see g++.dg/opt/nrv6.C. We could be more flexible if
10719 we were to do this optimization in tree-ssa. */
10720 && (outer = BLOCK_SUBBLOCKS (DECL_INITIAL (fndecl)))
10721 /* Skip the artificial function body block. */
10722 && (outer = BLOCK_SUBBLOCKS (outer))
10723 && chain_member (r, BLOCK_VARS (outer)))
10724 finalize_nrv (&DECL_SAVED_TREE (fndecl), r, DECL_RESULT (fndecl));
10726 current_function_return_value = NULL_TREE;
10729 /* Remember that we were in class scope. */
10730 if (current_class_name)
10731 ctype = current_class_type;
10733 /* Must mark the RESULT_DECL as being in this function. */
10734 DECL_CONTEXT (DECL_RESULT (fndecl)) = fndecl;
10736 /* Set the BLOCK_SUPERCONTEXT of the outermost function scope to point
10737 to the FUNCTION_DECL node itself. */
10738 BLOCK_SUPERCONTEXT (DECL_INITIAL (fndecl)) = fndecl;
10740 /* Save away current state, if appropriate. */
10741 if (!processing_template_decl)
10742 save_function_data (fndecl);
10744 /* Complain if there's just no return statement. */
10745 if (warn_return_type
10746 && TREE_CODE (TREE_TYPE (fntype)) != VOID_TYPE
10747 && !dependent_type_p (TREE_TYPE (fntype))
10748 && !current_function_returns_value && !current_function_returns_null
10749 /* Don't complain if we abort or throw. */
10750 && !current_function_returns_abnormally
10751 && !DECL_NAME (DECL_RESULT (fndecl))
10752 /* Normally, with -Wreturn-type, flow will complain. Unless we're an
10753 inline function, as we might never be compiled separately. */
10754 && (DECL_INLINE (fndecl) || processing_template_decl)
10755 /* Structor return values (if any) are set by the compiler. */
10756 && !DECL_CONSTRUCTOR_P (fndecl)
10757 && !DECL_DESTRUCTOR_P (fndecl))
10758 warning ("no return statement in function returning non-void");
10760 /* Store the end of the function, so that we get good line number
10761 info for the epilogue. */
10762 cfun->function_end_locus = input_location;
10764 /* Genericize before inlining. */
10765 if (!processing_template_decl)
10767 struct language_function *f = DECL_SAVED_FUNCTION_DATA (fndecl);
10768 cp_genericize (fndecl);
10769 /* Clear out the bits we don't need. */
10770 f->x_current_class_ptr = NULL;
10771 f->x_current_class_ref = NULL;
10772 f->x_eh_spec_block = NULL;
10773 f->x_in_charge_parm = NULL;
10774 f->x_vtt_parm = NULL;
10775 f->x_return_value = NULL;
10776 f->bindings = NULL;
10778 /* Handle attribute((warn_unused_result)). Relies on gimple input. */
10779 c_warn_unused_result (&DECL_SAVED_TREE (fndecl));
10781 /* Clear out the bits we don't need. */
10782 local_names = NULL;
10783 named_label_uses = NULL;
10785 /* We're leaving the context of this function, so zap cfun. It's still in
10786 DECL_STRUCT_FUNCTION, and we'll restore it in tree_rest_of_compilation. */
10788 current_function_decl = NULL;
10790 /* If this is an in-class inline definition, we may have to pop the
10791 bindings for the template parameters that we added in
10792 maybe_begin_member_template_processing when start_function was
10794 if (inclass_inline)
10795 maybe_end_member_template_processing ();
10797 /* Leave the scope of the class. */
10799 pop_nested_class ();
10805 /* Let the error reporting routines know that we're outside a
10806 function. For a nested function, this value is used in
10807 cxx_pop_function_context and then reset via pop_function_context. */
10808 current_function_decl = NULL_TREE;
10813 /* Create the FUNCTION_DECL for a function definition.
10814 DECLSPECS and DECLARATOR are the parts of the declaration;
10815 they describe the return type and the name of the function,
10816 but twisted together in a fashion that parallels the syntax of C.
10818 This function creates a binding context for the function body
10819 as well as setting up the FUNCTION_DECL in current_function_decl.
10821 Returns a FUNCTION_DECL on success.
10823 If the DECLARATOR is not suitable for a function (it defines a datum
10824 instead), we return 0, which tells yyparse to report a parse error.
10826 May return void_type_node indicating that this method is actually
10827 a friend. See grokfield for more details.
10829 Came here with a `.pushlevel' .
10831 DO NOT MAKE ANY CHANGES TO THIS CODE WITHOUT MAKING CORRESPONDING
10832 CHANGES TO CODE IN `grokfield'. */
10835 start_method (cp_decl_specifier_seq *declspecs,
10836 const cp_declarator *declarator, tree attrlist)
10838 tree fndecl = grokdeclarator (declarator, declspecs, MEMFUNCDEF, 0,
10841 if (fndecl == error_mark_node)
10842 return error_mark_node;
10844 if (fndecl == NULL || TREE_CODE (fndecl) != FUNCTION_DECL)
10846 error ("invalid member function declaration");
10847 return error_mark_node;
10851 cplus_decl_attributes (&fndecl, attrlist, 0);
10853 /* Pass friends other than inline friend functions back. */
10854 if (fndecl == void_type_node)
10857 if (DECL_IN_AGGR_P (fndecl))
10859 if (DECL_CONTEXT (fndecl)
10860 && TREE_CODE( DECL_CONTEXT (fndecl)) != NAMESPACE_DECL)
10861 error ("%qD is already defined in class %qT", fndecl,
10862 DECL_CONTEXT (fndecl));
10863 return void_type_node;
10866 check_template_shadow (fndecl);
10868 DECL_DECLARED_INLINE_P (fndecl) = 1;
10869 if (flag_default_inline)
10870 DECL_INLINE (fndecl) = 1;
10872 /* We process method specializations in finish_struct_1. */
10873 if (processing_template_decl && !DECL_TEMPLATE_SPECIALIZATION (fndecl))
10875 fndecl = push_template_decl (fndecl);
10876 if (fndecl == error_mark_node)
10880 if (! DECL_FRIEND_P (fndecl))
10882 if (TREE_CHAIN (fndecl))
10884 fndecl = copy_node (fndecl);
10885 TREE_CHAIN (fndecl) = NULL_TREE;
10887 grok_special_member_properties (fndecl);
10890 cp_finish_decl (fndecl, NULL_TREE, NULL_TREE, 0);
10892 /* Make a place for the parms. */
10893 begin_scope (sk_function_parms, fndecl);
10895 DECL_IN_AGGR_P (fndecl) = 1;
10899 /* Go through the motions of finishing a function definition.
10900 We don't compile this method until after the whole class has
10903 FINISH_METHOD must return something that looks as though it
10904 came from GROKFIELD (since we are defining a method, after all).
10906 This is called after parsing the body of the function definition.
10907 STMTS is the chain of statements that makes up the function body.
10909 DECL is the ..._DECL that `start_method' provided. */
10912 finish_method (tree decl)
10914 tree fndecl = decl;
10919 if (decl == void_type_node)
10922 old_initial = DECL_INITIAL (fndecl);
10924 /* Undo the level for the parms (from start_method).
10925 This is like poplevel, but it causes nothing to be
10926 saved. Saving information here confuses symbol-table
10927 output routines. Besides, this information will
10928 be correctly output when this method is actually
10931 /* Clear out the meanings of the local variables of this level;
10932 also record in each decl which block it belongs to. */
10934 for (link = current_binding_level->names; link; link = TREE_CHAIN (link))
10936 if (DECL_NAME (link) != NULL_TREE)
10937 pop_binding (DECL_NAME (link), link);
10938 gcc_assert (TREE_CODE (link) != FUNCTION_DECL);
10939 DECL_CONTEXT (link) = NULL_TREE;
10942 poplevel (0, 0, 0);
10944 DECL_INITIAL (fndecl) = old_initial;
10946 /* We used to check if the context of FNDECL was different from
10947 current_class_type as another way to get inside here. This didn't work
10948 for String.cc in libg++. */
10949 if (DECL_FRIEND_P (fndecl))
10951 VEC_safe_push (tree, CLASSTYPE_INLINE_FRIENDS (current_class_type),
10953 decl = void_type_node;
10960 /* VAR is a VAR_DECL. If its type is incomplete, remember VAR so that
10961 we can lay it out later, when and if its type becomes complete. */
10964 maybe_register_incomplete_var (tree var)
10966 gcc_assert (TREE_CODE (var) == VAR_DECL);
10968 /* Keep track of variables with incomplete types. */
10969 if (!processing_template_decl && TREE_TYPE (var) != error_mark_node
10970 && DECL_EXTERNAL (var))
10972 tree inner_type = TREE_TYPE (var);
10974 while (TREE_CODE (inner_type) == ARRAY_TYPE)
10975 inner_type = TREE_TYPE (inner_type);
10976 inner_type = TYPE_MAIN_VARIANT (inner_type);
10978 if ((!COMPLETE_TYPE_P (inner_type) && CLASS_TYPE_P (inner_type))
10979 /* RTTI TD entries are created while defining the type_info. */
10980 || (TYPE_LANG_SPECIFIC (inner_type)
10981 && TYPE_BEING_DEFINED (inner_type)))
10982 incomplete_vars = tree_cons (inner_type, var, incomplete_vars);
10986 /* Called when a class type (given by TYPE) is defined. If there are
10987 any existing VAR_DECLs whose type hsa been completed by this
10988 declaration, update them now. */
10991 complete_vars (tree type)
10993 tree *list = &incomplete_vars;
10995 gcc_assert (CLASS_TYPE_P (type));
10998 if (same_type_p (type, TREE_PURPOSE (*list)))
11000 tree var = TREE_VALUE (*list);
11001 /* Complete the type of the variable. The VAR_DECL itself
11002 will be laid out in expand_expr. */
11003 complete_type (TREE_TYPE (var));
11004 /* Remove this entry from the list. */
11005 *list = TREE_CHAIN (*list);
11008 list = &TREE_CHAIN (*list);
11011 /* Check for pending declarations which may have abstract type. */
11012 complete_type_check_abstract (type);
11015 /* If DECL is of a type which needs a cleanup, build that cleanup
11019 cxx_maybe_build_cleanup (tree decl)
11021 tree type = TREE_TYPE (decl);
11023 if (type != error_mark_node && TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type))
11025 int flags = LOOKUP_NORMAL|LOOKUP_DESTRUCTOR;
11027 bool has_vbases = (TREE_CODE (type) == RECORD_TYPE
11028 && CLASSTYPE_VBASECLASSES (type));
11030 if (TREE_CODE (type) == ARRAY_TYPE)
11034 cxx_mark_addressable (decl);
11035 rval = build_unary_op (ADDR_EXPR, decl, 0);
11038 /* Optimize for space over speed here. */
11039 if (!has_vbases || flag_expensive_optimizations)
11040 flags |= LOOKUP_NONVIRTUAL;
11042 rval = build_delete (TREE_TYPE (rval), rval,
11043 sfk_complete_destructor, flags, 0);
11045 if (has_vbases && !TYPE_HAS_DESTRUCTOR (type))
11046 rval = build_compound_expr (rval, build_vbase_delete (type, decl));
11053 /* When a stmt has been parsed, this function is called. */
11060 /* DECL was originally constructed as a non-static member function,
11061 but turned out to be static. Update it accordingly. */
11064 revert_static_member_fn (tree decl)
11067 tree function = TREE_TYPE (decl);
11068 tree args = TYPE_ARG_TYPES (function);
11070 if (cp_type_quals (TREE_TYPE (TREE_VALUE (args)))
11071 != TYPE_UNQUALIFIED)
11072 error ("static member function %q#D declared with type qualifiers", decl);
11074 args = TREE_CHAIN (args);
11075 tmp = build_function_type (TREE_TYPE (function), args);
11076 tmp = build_qualified_type (tmp, cp_type_quals (function));
11077 tmp = build_exception_variant (tmp,
11078 TYPE_RAISES_EXCEPTIONS (function));
11079 TREE_TYPE (decl) = tmp;
11080 if (DECL_ARGUMENTS (decl))
11081 DECL_ARGUMENTS (decl) = TREE_CHAIN (DECL_ARGUMENTS (decl));
11082 DECL_STATIC_FUNCTION_P (decl) = 1;
11085 /* Initialize the variables used during compilation of a C++
11089 cxx_push_function_context (struct function * f)
11091 struct language_function *p = GGC_CNEW (struct language_function);
11094 /* Whenever we start a new function, we destroy temporaries in the
11096 current_stmt_tree ()->stmts_are_full_exprs_p = 1;
11102 if (DECL_SAVED_FUNCTION_DATA (fn))
11104 /* If we already parsed this function, and we're just expanding it
11105 now, restore saved state. */
11106 *cp_function_chain = *DECL_SAVED_FUNCTION_DATA (fn);
11108 /* We don't need the saved data anymore. Unless this is an inline
11109 function; we need the named return value info for
11110 declare_return_variable. */
11111 if (! DECL_INLINE (fn))
11112 DECL_SAVED_FUNCTION_DATA (fn) = NULL;
11117 /* Free the language-specific parts of F, now that we've finished
11118 compiling the function. */
11121 cxx_pop_function_context (struct function * f)
11126 /* Return which tree structure is used by T, or TS_CP_GENERIC if T is
11127 one of the language-independent trees. */
11129 enum cp_tree_node_structure_enum
11130 cp_tree_node_structure (union lang_tree_node * t)
11132 switch (TREE_CODE (&t->generic))
11134 case DEFAULT_ARG: return TS_CP_DEFAULT_ARG;
11135 case IDENTIFIER_NODE: return TS_CP_IDENTIFIER;
11136 case OVERLOAD: return TS_CP_OVERLOAD;
11137 case TEMPLATE_PARM_INDEX: return TS_CP_TPI;
11138 case TINST_LEVEL: return TS_CP_TINST_LEVEL;
11139 case PTRMEM_CST: return TS_CP_PTRMEM;
11140 case BASELINK: return TS_CP_BASELINK;
11141 default: return TS_CP_GENERIC;
11145 /* Build the void_list_node (void_type_node having been created). */
11147 build_void_list_node (void)
11149 tree t = build_tree_list (NULL_TREE, void_type_node);
11154 cp_missing_noreturn_ok_p (tree decl)
11156 /* A missing noreturn is ok for the `main' function. */
11157 return DECL_MAIN_P (decl);
11160 /* Return the COMDAT group into which DECL should be placed. */
11163 cxx_comdat_group (tree decl)
11167 /* Virtual tables, construction virtual tables, and virtual table
11168 tables all go in a single COMDAT group, named after the primary
11170 if (TREE_CODE (decl) == VAR_DECL && DECL_VTABLE_OR_VTT_P (decl))
11171 name = DECL_ASSEMBLER_NAME (CLASSTYPE_VTABLES (DECL_CONTEXT (decl)));
11172 /* For all other DECLs, the COMDAT group is the mangled name of the
11173 declaration itself. */
11175 name = DECL_ASSEMBLER_NAME (decl);
11177 return IDENTIFIER_POINTER (name);
11180 #include "gt-cp-decl.h"