1 /* Process declarations and variables for C++ compiler.
2 Copyright (C) 1988, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000,
3 2001, 2002, 2003, 2004 Free Software Foundation, Inc.
4 Contributed by Michael Tiemann (tiemann@cygnus.com)
6 This file is part of GCC.
8 GCC is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2, or (at your option)
13 GCC is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with GCC; see the file COPYING. If not, write to
20 the Free Software Foundation, 59 Temple Place - Suite 330,
21 Boston, MA 02111-1307, USA. */
24 /* Process declarations and symbol lookup for C++ front end.
25 Also constructs types; the standard scalar types at initialization,
26 and structure, union, array and enum types when they are declared. */
28 /* ??? not all decl nodes are given the most useful possible
29 line numbers. For example, the CONST_DECLs for enum values. */
33 #include "coretypes.h"
40 #include "tree-inline.h"
50 #include "diagnostic.h"
53 #include "tree-flow.h"
55 static tree grokparms (cp_parameter_declarator *, tree *);
56 static const char *redeclaration_error_message (tree, tree);
58 static int decl_jump_unsafe (tree);
59 static void require_complete_types_for_parms (tree);
60 static int ambi_op_p (enum tree_code);
61 static int unary_op_p (enum tree_code);
62 static void push_local_name (tree);
63 static tree grok_reference_init (tree, tree, tree, tree *);
64 static tree grokfndecl (tree, tree, tree, tree, tree, int,
65 enum overload_flags, cp_cv_quals,
66 tree, int, int, int, int, int, int, tree);
67 static tree grokvardecl (tree, tree, const cp_decl_specifier_seq *,
69 static void record_unknown_type (tree, const char *);
70 static tree builtin_function_1 (const char *, tree, tree,
71 enum built_in_function code,
72 enum built_in_class cl, const char *,
74 static tree build_library_fn_1 (tree, enum tree_code, tree);
75 static int member_function_or_else (tree, tree, enum overload_flags);
76 static void bad_specifiers (tree, const char *, int, int, int, int,
78 static void check_for_uninitialized_const_var (tree);
79 static hashval_t typename_hash (const void *);
80 static int typename_compare (const void *, const void *);
81 static tree local_variable_p_walkfn (tree *, int *, void *);
82 static tree record_builtin_java_type (const char *, int);
83 static const char *tag_name (enum tag_types code);
84 static int walk_namespaces_r (tree, walk_namespaces_fn, void *);
85 static int walk_globals_r (tree, void*);
86 static int walk_vtables_r (tree, void*);
87 static tree make_label_decl (tree, int);
88 static void use_label (tree);
89 static void check_previous_goto_1 (tree, struct cp_binding_level *, tree,
91 static void check_previous_goto (struct named_label_use_list *);
92 static void check_switch_goto (struct cp_binding_level *);
93 static void check_previous_gotos (tree);
94 static void pop_label (tree, tree);
95 static void pop_labels (tree);
96 static void maybe_deduce_size_from_array_init (tree, tree);
97 static void layout_var_decl (tree);
98 static void maybe_commonize_var (tree);
99 static tree check_initializer (tree, tree, int, tree *);
100 static void make_rtl_for_nonlocal_decl (tree, tree, const char *);
101 static void save_function_data (tree);
102 static void check_function_type (tree, tree);
103 static void finish_constructor_body (void);
104 static void begin_destructor_body (void);
105 static void finish_destructor_body (void);
106 static tree create_array_type_for_decl (tree, tree, tree);
107 static tree get_atexit_node (void);
108 static tree get_dso_handle_node (void);
109 static tree start_cleanup_fn (void);
110 static void end_cleanup_fn (void);
111 static tree cp_make_fname_decl (tree, int);
112 static void initialize_predefined_identifiers (void);
113 static tree check_special_function_return_type
114 (special_function_kind, tree, tree);
115 static tree push_cp_library_fn (enum tree_code, tree);
116 static tree build_cp_library_fn (tree, enum tree_code, tree);
117 static void store_parm_decls (tree);
118 static void initialize_local_var (tree, tree);
119 static void expand_static_init (tree, tree);
120 static tree next_initializable_field (tree);
121 static tree reshape_init (tree, tree *);
122 static tree build_typename_type (tree, tree, tree);
124 /* Erroneous argument lists can use this *IFF* they do not modify it. */
125 tree error_mark_list;
127 /* The following symbols are subsumed in the cp_global_trees array, and
128 listed here individually for documentation purposes.
131 tree wchar_decl_node;
133 tree vtable_entry_type;
134 tree delta_type_node;
135 tree __t_desc_type_node;
136 tree ti_desc_type_node;
137 tree bltn_desc_type_node, ptr_desc_type_node;
138 tree ary_desc_type_node, func_desc_type_node, enum_desc_type_node;
139 tree class_desc_type_node, si_class_desc_type_node, vmi_class_desc_type_node;
140 tree ptm_desc_type_node;
141 tree base_desc_type_node;
143 tree class_type_node;
144 tree unknown_type_node;
146 Array type `vtable_entry_type[]'
149 tree vtbl_ptr_type_node;
156 A FUNCTION_DECL which can call `abort'. Not necessarily the
157 one that the user will declare, but sufficient to be called
158 by routines that want to abort the program.
162 The FUNCTION_DECL for the default `::operator delete'.
164 tree global_delete_fndecl;
167 tree type_info_type_node, tinfo_decl_id, tinfo_decl_type;
172 tree cp_global_trees[CPTI_MAX];
174 /* Indicates that there is a type value in some namespace, although
175 that is not necessarily in scope at the moment. */
177 tree global_type_node;
179 /* The node that holds the "name" of the global scope. */
180 tree global_scope_name;
182 /* Used only for jumps to as-yet undefined labels, since jumps to
183 defined labels can have their validity checked immediately. */
185 struct named_label_use_list GTY(())
187 struct cp_binding_level *binding_level;
190 location_t o_goto_locus;
191 struct named_label_use_list *next;
194 #define named_label_uses cp_function_chain->x_named_label_uses
196 #define local_names cp_function_chain->x_local_names
198 /* A list of objects which have constructors or destructors
199 which reside in the global scope. The decl is stored in
200 the TREE_VALUE slot and the initializer is stored
201 in the TREE_PURPOSE slot. */
202 tree static_aggregates;
206 /* A node for the integer constants 2, and 3. */
208 tree integer_two_node, integer_three_node;
210 /* A list of all LABEL_DECLs in the function that have names. Here so
211 we can clear out their names' definitions at the end of the
212 function, and so we can check the validity of jumps to these labels. */
214 struct named_label_list GTY(())
216 struct cp_binding_level *binding_level;
221 struct named_label_list *next;
222 unsigned int in_try_scope : 1;
223 unsigned int in_catch_scope : 1;
226 #define named_labels cp_function_chain->x_named_labels
228 /* The number of function bodies which we are currently processing.
229 (Zero if we are at namespace scope, one inside the body of a
230 function, two inside the body of a function in a local class, etc.) */
233 /* States indicating how grokdeclarator() should handle declspecs marked
234 with __attribute__((deprecated)). An object declared as
235 __attribute__((deprecated)) suppresses warnings of uses of other
238 enum deprecated_states {
243 static enum deprecated_states deprecated_state = DEPRECATED_NORMAL;
245 /* True if a declaration with an `extern' linkage specifier is being
247 bool have_extern_spec;
250 /* A TREE_LIST of VAR_DECLs. The TREE_PURPOSE is a RECORD_TYPE or
251 UNION_TYPE; the TREE_VALUE is a VAR_DECL with that type. At the
252 time the VAR_DECL was declared, the type was incomplete. */
254 static GTY(()) tree incomplete_vars;
256 /* Returns the kind of template specialization we are currently
257 processing, given that it's declaration contained N_CLASS_SCOPES
258 explicit scope qualifications. */
261 current_tmpl_spec_kind (int n_class_scopes)
263 int n_template_parm_scopes = 0;
264 int seen_specialization_p = 0;
265 int innermost_specialization_p = 0;
266 struct cp_binding_level *b;
268 /* Scan through the template parameter scopes. */
269 for (b = current_binding_level;
270 b->kind == sk_template_parms;
273 /* If we see a specialization scope inside a parameter scope,
274 then something is wrong. That corresponds to a declaration
277 template <class T> template <> ...
279 which is always invalid since [temp.expl.spec] forbids the
280 specialization of a class member template if the enclosing
281 class templates are not explicitly specialized as well. */
282 if (b->explicit_spec_p)
284 if (n_template_parm_scopes == 0)
285 innermost_specialization_p = 1;
287 seen_specialization_p = 1;
289 else if (seen_specialization_p == 1)
290 return tsk_invalid_member_spec;
292 ++n_template_parm_scopes;
295 /* Handle explicit instantiations. */
296 if (processing_explicit_instantiation)
298 if (n_template_parm_scopes != 0)
299 /* We've seen a template parameter list during an explicit
300 instantiation. For example:
302 template <class T> template void f(int);
304 This is erroneous. */
305 return tsk_invalid_expl_inst;
307 return tsk_expl_inst;
310 if (n_template_parm_scopes < n_class_scopes)
311 /* We've not seen enough template headers to match all the
312 specialized classes present. For example:
314 template <class T> void R<T>::S<T>::f(int);
316 This is invalid; there needs to be one set of template
317 parameters for each class. */
318 return tsk_insufficient_parms;
319 else if (n_template_parm_scopes == n_class_scopes)
320 /* We're processing a non-template declaration (even though it may
321 be a member of a template class.) For example:
323 template <class T> void S<T>::f(int);
325 The `class T' maches the `S<T>', leaving no template headers
326 corresponding to the `f'. */
328 else if (n_template_parm_scopes > n_class_scopes + 1)
329 /* We've got too many template headers. For example:
331 template <> template <class T> void f (T);
333 There need to be more enclosing classes. */
334 return tsk_excessive_parms;
336 /* This must be a template. It's of the form:
338 template <class T> template <class U> void S<T>::f(U);
340 This is a specialization if the innermost level was a
341 specialization; otherwise it's just a definition of the
343 return innermost_specialization_p ? tsk_expl_spec : tsk_template;
346 /* Exit the current scope. */
354 /* When a label goes out of scope, check to see if that label was used
355 in a valid manner, and issue any appropriate warnings or errors. */
358 pop_label (tree label, tree old_value)
360 if (!processing_template_decl)
362 if (DECL_INITIAL (label) == NULL_TREE)
366 cp_error_at ("label `%D' used but not defined", label);
367 #ifdef USE_MAPPED_LOCATION
368 location = input_location; /* FIXME want (input_filename, (line)0) */
370 location.file = input_filename;
373 /* Avoid crashing later. */
374 define_label (location, DECL_NAME (label));
376 else if (warn_unused_label && !TREE_USED (label))
377 cp_warning_at ("label `%D' defined but not used", label);
380 SET_IDENTIFIER_LABEL_VALUE (DECL_NAME (label), old_value);
383 /* At the end of a function, all labels declared within the function
384 go out of scope. BLOCK is the top-level block for the
388 pop_labels (tree block)
390 struct named_label_list *link;
392 /* Clear out the definitions of all label names, since their scopes
394 for (link = named_labels; link; link = link->next)
396 pop_label (link->label_decl, link->old_value);
397 /* Put the labels into the "variables" of the top-level block,
398 so debugger can see them. */
399 TREE_CHAIN (link->label_decl) = BLOCK_VARS (block);
400 BLOCK_VARS (block) = link->label_decl;
406 /* Exit a binding level.
407 Pop the level off, and restore the state of the identifier-decl mappings
408 that were in effect when this level was entered.
410 If KEEP == 1, this level had explicit declarations, so
411 and create a "block" (a BLOCK node) for the level
412 to record its declarations and subblocks for symbol table output.
414 If FUNCTIONBODY is nonzero, this level is the body of a function,
415 so create a block as if KEEP were set and also clear out all
418 If REVERSE is nonzero, reverse the order of decls before putting
419 them into the BLOCK. */
422 poplevel (int keep, int reverse, int functionbody)
425 /* The chain of decls was accumulated in reverse order.
426 Put it into forward order, just for cleanliness. */
428 int tmp = functionbody;
429 int real_functionbody;
433 int leaving_for_scope;
436 timevar_push (TV_NAME_LOOKUP);
441 my_friendly_assert (current_binding_level->kind != sk_class, 19990916);
443 real_functionbody = (current_binding_level->kind == sk_cleanup
444 ? ((functionbody = 0), tmp) : functionbody);
445 subblocks = functionbody >= 0 ? current_binding_level->blocks : 0;
447 my_friendly_assert (VEC_length(cp_class_binding,
448 current_binding_level->class_shadowed) == 0,
451 /* We used to use KEEP == 2 to indicate that the new block should go
452 at the beginning of the list of blocks at this binding level,
453 rather than the end. This hack is no longer used. */
454 my_friendly_assert (keep == 0 || keep == 1, 0);
456 if (current_binding_level->keep)
459 /* Any uses of undefined labels, and any defined labels, now operate
460 under constraints of next binding contour. */
461 if (cfun && !functionbody)
463 struct cp_binding_level *level_chain;
464 level_chain = current_binding_level->level_chain;
467 struct named_label_use_list *uses;
468 struct named_label_list *labels;
469 for (labels = named_labels; labels; labels = labels->next)
470 if (labels->binding_level == current_binding_level)
473 if (current_binding_level->kind == sk_try)
474 labels->in_try_scope = 1;
475 if (current_binding_level->kind == sk_catch)
476 labels->in_catch_scope = 1;
477 for (decl = labels->names_in_scope; decl;
478 decl = TREE_CHAIN (decl))
479 if (decl_jump_unsafe (decl))
480 labels->bad_decls = tree_cons (NULL_TREE, decl,
482 labels->binding_level = level_chain;
483 labels->names_in_scope = level_chain->names;
486 for (uses = named_label_uses; uses; uses = uses->next)
487 if (uses->binding_level == current_binding_level)
489 uses->binding_level = level_chain;
490 uses->names_in_scope = level_chain->names;
495 /* Get the decls in the order they were written.
496 Usually current_binding_level->names is in reverse order.
497 But parameter decls were previously put in forward order. */
500 current_binding_level->names
501 = decls = nreverse (current_binding_level->names);
503 decls = current_binding_level->names;
505 /* If there were any declarations or structure tags in that level,
506 or if this level is a function body,
507 create a BLOCK to record them for the life of this function. */
509 if (keep == 1 || functionbody)
510 block = make_node (BLOCK);
511 if (block != NULL_TREE)
513 BLOCK_VARS (block) = decls;
514 BLOCK_SUBBLOCKS (block) = subblocks;
517 /* In each subblock, record that this is its superior. */
519 for (link = subblocks; link; link = TREE_CHAIN (link))
520 BLOCK_SUPERCONTEXT (link) = block;
522 /* We still support the old for-scope rules, whereby the variables
523 in a for-init statement were in scope after the for-statement
524 ended. We only use the new rules if flag_new_for_scope is
527 = current_binding_level->kind == sk_for && flag_new_for_scope == 1;
529 /* Before we remove the declarations first check for unused variables. */
530 if (warn_unused_variable
531 && !processing_template_decl)
532 for (decl = getdecls (); decl; decl = TREE_CHAIN (decl))
533 if (TREE_CODE (decl) == VAR_DECL
534 && ! TREE_USED (decl)
535 && ! DECL_IN_SYSTEM_HEADER (decl)
536 && DECL_NAME (decl) && ! DECL_ARTIFICIAL (decl))
537 warning ("%Junused variable '%D'", decl, decl);
539 /* Remove declarations for all the DECLs in this level. */
540 for (link = decls; link; link = TREE_CHAIN (link))
542 if (leaving_for_scope && TREE_CODE (link) == VAR_DECL
545 tree name = DECL_NAME (link);
549 ob = outer_binding (name,
550 IDENTIFIER_BINDING (name),
553 ns_binding = IDENTIFIER_NAMESPACE_VALUE (name);
555 ns_binding = NULL_TREE;
557 if (ob && ob->scope == current_binding_level->level_chain)
558 /* We have something like:
563 and we are leaving the `for' scope. There's no reason to
564 keep the binding of the inner `i' in this case. */
565 pop_binding (name, link);
566 else if ((ob && (TREE_CODE (ob->value) == TYPE_DECL))
567 || (ns_binding && TREE_CODE (ns_binding) == TYPE_DECL))
568 /* Here, we have something like:
576 We must pop the for-scope binding so we know what's a
577 type and what isn't. */
578 pop_binding (name, link);
581 /* Mark this VAR_DECL as dead so that we can tell we left it
582 there only for backward compatibility. */
583 DECL_DEAD_FOR_LOCAL (link) = 1;
585 /* Keep track of what should have happened when we
586 popped the binding. */
588 DECL_SHADOWED_FOR_VAR (link) = ob->value;
590 /* Add it to the list of dead variables in the next
591 outermost binding to that we can remove these when we
592 leave that binding. */
593 current_binding_level->level_chain->dead_vars_from_for
594 = tree_cons (NULL_TREE, link,
595 current_binding_level->level_chain->
598 /* Although we don't pop the cxx_binding, we do clear
599 its SCOPE since the scope is going away now. */
600 IDENTIFIER_BINDING (name)->scope
601 = current_binding_level->level_chain;
606 /* Remove the binding. */
609 if (TREE_CODE (decl) == TREE_LIST)
610 decl = TREE_VALUE (decl);
613 pop_binding (DECL_NAME (decl), decl);
614 else if (TREE_CODE (decl) == OVERLOAD)
615 pop_binding (DECL_NAME (OVL_FUNCTION (decl)), decl);
621 /* Remove declarations for any `for' variables from inner scopes
622 that we kept around. */
623 for (link = current_binding_level->dead_vars_from_for;
624 link; link = TREE_CHAIN (link))
625 pop_binding (DECL_NAME (TREE_VALUE (link)), TREE_VALUE (link));
627 /* Restore the IDENTIFIER_TYPE_VALUEs. */
628 for (link = current_binding_level->type_shadowed;
629 link; link = TREE_CHAIN (link))
630 SET_IDENTIFIER_TYPE_VALUE (TREE_PURPOSE (link), TREE_VALUE (link));
632 /* Restore the IDENTIFIER_LABEL_VALUEs for local labels. */
633 for (link = current_binding_level->shadowed_labels;
635 link = TREE_CHAIN (link))
636 pop_label (TREE_VALUE (link), TREE_PURPOSE (link));
638 /* There may be OVERLOADs (wrapped in TREE_LISTs) on the BLOCK_VARs
639 list if a `using' declaration put them there. The debugging
640 back-ends won't understand OVERLOAD, so we remove them here.
641 Because the BLOCK_VARS are (temporarily) shared with
642 CURRENT_BINDING_LEVEL->NAMES we must do this fixup after we have
643 popped all the bindings. */
648 for (d = &BLOCK_VARS (block); *d; )
650 if (TREE_CODE (*d) == TREE_LIST)
651 *d = TREE_CHAIN (*d);
653 d = &TREE_CHAIN (*d);
657 /* If the level being exited is the top level of a function,
658 check over all the labels. */
661 /* Since this is the top level block of a function, the vars are
662 the function's parameters. Don't leave them in the BLOCK
663 because they are found in the FUNCTION_DECL instead. */
664 BLOCK_VARS (block) = 0;
668 kind = current_binding_level->kind;
669 if (kind == sk_cleanup)
673 /* If this is a temporary binding created for a cleanup, then we'll
674 have pushed a statement list level. Pop that, create a new
675 BIND_EXPR for the block, and insert it into the stream. */
676 stmt = pop_stmt_list (current_binding_level->statement_list);
677 stmt = c_build_bind_expr (block, stmt);
683 DECL_INITIAL (current_function_decl) = block;
685 current_binding_level->blocks
686 = chainon (current_binding_level->blocks, block);
688 /* If we did not make a block for the level just exited,
689 any blocks made for inner levels
690 (since they cannot be recorded as subblocks in that level)
691 must be carried forward so they will later become subblocks
692 of something else. */
694 current_binding_level->blocks
695 = chainon (current_binding_level->blocks, subblocks);
697 /* Each and every BLOCK node created here in `poplevel' is important
698 (e.g. for proper debugging information) so if we created one
699 earlier, mark it as "used". */
701 TREE_USED (block) = 1;
703 /* All temporary bindings created for cleanups are popped silently. */
704 if (kind == sk_cleanup)
707 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, block);
710 /* Delete the node BLOCK from the current binding level.
711 This is used for the block inside a stmt expr ({...})
712 so that the block can be reinserted where appropriate. */
715 delete_block (tree block)
718 if (current_binding_level->blocks == block)
719 current_binding_level->blocks = TREE_CHAIN (block);
720 for (t = current_binding_level->blocks; t;)
722 if (TREE_CHAIN (t) == block)
723 TREE_CHAIN (t) = TREE_CHAIN (block);
727 TREE_CHAIN (block) = NULL_TREE;
728 /* Clear TREE_USED which is always set by poplevel.
729 The flag is set again if insert_block is called. */
730 TREE_USED (block) = 0;
733 /* Insert BLOCK at the end of the list of subblocks of the
734 current binding level. This is used when a BIND_EXPR is expanded,
735 to handle the BLOCK node inside the BIND_EXPR. */
738 insert_block (tree block)
740 TREE_USED (block) = 1;
741 current_binding_level->blocks
742 = chainon (current_binding_level->blocks, block);
745 /* Returns nonzero if T is a virtual function table. */
748 vtable_decl_p (tree t, void* data ATTRIBUTE_UNUSED )
750 return (TREE_CODE (t) == VAR_DECL && DECL_VIRTUAL_P (t));
753 /* Returns nonzero if T is a TYPE_DECL for a type with virtual
757 vtype_decl_p (tree t, void *data ATTRIBUTE_UNUSED )
759 return (TREE_CODE (t) == TYPE_DECL
760 && TREE_CODE (TREE_TYPE (t)) == RECORD_TYPE
761 && TYPE_POLYMORPHIC_P (TREE_TYPE (t)));
764 struct walk_globals_data {
770 /* Walk the vtable declarations in NAMESPACE. Whenever one is found
771 for which P returns nonzero, call F with its address. If any call
772 to F returns a nonzero value, return a nonzero value. */
775 walk_vtables_r (tree namespace, void* data)
777 struct walk_globals_data* wgd = (struct walk_globals_data *) data;
778 walk_globals_fn f = wgd->f;
780 tree decl = NAMESPACE_LEVEL (namespace)->vtables;
783 for (; decl ; decl = TREE_CHAIN (decl))
784 result |= (*f) (&decl, d);
789 /* Walk the vtable declarations. Whenever one is found for which P
790 returns nonzero, call F with its address. If any call to F
791 returns a nonzero value, return a nonzero value. */
793 walk_vtables (walk_globals_pred p, walk_globals_fn f, void *data)
795 struct walk_globals_data wgd;
800 return walk_namespaces (walk_vtables_r, &wgd);
803 /* Walk all the namespaces contained NAMESPACE, including NAMESPACE
804 itself, calling F for each. The DATA is passed to F as well. */
807 walk_namespaces_r (tree namespace, walk_namespaces_fn f, void* data)
810 tree current = NAMESPACE_LEVEL (namespace)->namespaces;
812 result |= (*f) (namespace, data);
814 for (; current; current = TREE_CHAIN (current))
815 result |= walk_namespaces_r (current, f, data);
820 /* Walk all the namespaces, calling F for each. The DATA is passed to
824 walk_namespaces (walk_namespaces_fn f, void* data)
826 return walk_namespaces_r (global_namespace, f, data);
829 /* Walk the global declarations in NAMESPACE. Whenever one is found
830 for which P returns nonzero, call F with its address. If any call
831 to F returns a nonzero value, return a nonzero value. */
834 walk_globals_r (tree namespace, void* data)
836 struct walk_globals_data* wgd = (struct walk_globals_data *) data;
837 walk_globals_pred p = wgd->p;
838 walk_globals_fn f = wgd->f;
843 t = &NAMESPACE_LEVEL (namespace)->names;
850 result |= (*f) (t, d);
852 /* If F changed *T, then *T still points at the next item to
855 t = &TREE_CHAIN (*t);
861 /* Walk the global declarations. Whenever one is found for which P
862 returns true, call F with its address. If any call to F
863 returns true, return true. */
866 walk_globals (walk_globals_pred p, walk_globals_fn f, void *data)
868 struct walk_globals_data wgd;
873 return walk_namespaces (walk_globals_r, &wgd);
876 /* Call wrapup_globals_declarations for the globals in NAMESPACE. If
877 DATA is non-NULL, this is the last time we will call
878 wrapup_global_declarations for this NAMESPACE. */
881 wrapup_globals_for_namespace (tree namespace, void* data)
883 struct cp_binding_level *level = NAMESPACE_LEVEL (namespace);
884 varray_type statics = level->static_decls;
885 tree *vec = &VARRAY_TREE (statics, 0);
886 int len = VARRAY_ACTIVE_SIZE (statics);
887 int last_time = (data != 0);
891 check_global_declarations (vec, len);
895 /* Write out any globals that need to be output. */
896 return wrapup_global_declarations (vec, len);
900 /* In C++, you don't have to write `struct S' to refer to `S'; you
901 can just use `S'. We accomplish this by creating a TYPE_DECL as
902 if the user had written `typedef struct S S'. Create and return
903 the TYPE_DECL for TYPE. */
906 create_implicit_typedef (tree name, tree type)
910 decl = build_decl (TYPE_DECL, name, type);
911 DECL_ARTIFICIAL (decl) = 1;
912 /* There are other implicit type declarations, like the one *within*
913 a class that allows you to write `S::S'. We must distinguish
915 SET_DECL_IMPLICIT_TYPEDEF_P (decl);
916 TYPE_NAME (type) = decl;
921 /* Remember a local name for name-mangling purposes. */
924 push_local_name (tree decl)
929 timevar_push (TV_NAME_LOOKUP);
931 VARRAY_TREE_INIT (local_names, 8, "local_names");
933 name = DECL_NAME (decl);
935 nelts = VARRAY_ACTIVE_SIZE (local_names);
936 for (i = 0; i < nelts; i++)
938 t = VARRAY_TREE (local_names, i);
939 if (DECL_NAME (t) == name)
941 if (!DECL_LANG_SPECIFIC (decl))
942 retrofit_lang_decl (decl);
943 DECL_LANG_SPECIFIC (decl)->decl_flags.u2sel = 1;
944 if (DECL_LANG_SPECIFIC (t))
945 DECL_DISCRIMINATOR (decl) = DECL_DISCRIMINATOR (t) + 1;
947 DECL_DISCRIMINATOR (decl) = 1;
949 VARRAY_TREE (local_names, i) = decl;
950 timevar_pop (TV_NAME_LOOKUP);
955 VARRAY_PUSH_TREE (local_names, decl);
956 timevar_pop (TV_NAME_LOOKUP);
959 /* Subroutine of duplicate_decls: return truthvalue of whether
960 or not types of these decls match.
962 For C++, we must compare the parameter list so that `int' can match
963 `int&' in a parameter position, but `int&' is not confused with
967 decls_match (tree newdecl, tree olddecl)
971 if (newdecl == olddecl)
974 if (TREE_CODE (newdecl) != TREE_CODE (olddecl))
975 /* If the two DECLs are not even the same kind of thing, we're not
976 interested in their types. */
979 if (TREE_CODE (newdecl) == FUNCTION_DECL)
981 tree f1 = TREE_TYPE (newdecl);
982 tree f2 = TREE_TYPE (olddecl);
983 tree p1 = TYPE_ARG_TYPES (f1);
984 tree p2 = TYPE_ARG_TYPES (f2);
986 if (CP_DECL_CONTEXT (newdecl) != CP_DECL_CONTEXT (olddecl)
987 && ! (DECL_EXTERN_C_P (newdecl)
988 && DECL_EXTERN_C_P (olddecl)))
991 if (TREE_CODE (f1) != TREE_CODE (f2))
994 if (same_type_p (TREE_TYPE (f1), TREE_TYPE (f2)))
996 if (p2 == NULL_TREE && DECL_EXTERN_C_P (olddecl)
997 && (DECL_BUILT_IN (olddecl)
998 #ifndef NO_IMPLICIT_EXTERN_C
999 || (DECL_IN_SYSTEM_HEADER (newdecl) && !DECL_CLASS_SCOPE_P (newdecl))
1000 || (DECL_IN_SYSTEM_HEADER (olddecl) && !DECL_CLASS_SCOPE_P (olddecl))
1004 types_match = self_promoting_args_p (p1);
1005 if (p1 == void_list_node)
1006 TREE_TYPE (newdecl) = TREE_TYPE (olddecl);
1008 #ifndef NO_IMPLICIT_EXTERN_C
1009 else if (p1 == NULL_TREE
1010 && (DECL_EXTERN_C_P (olddecl)
1011 && DECL_IN_SYSTEM_HEADER (olddecl)
1012 && !DECL_CLASS_SCOPE_P (olddecl))
1013 && (DECL_EXTERN_C_P (newdecl)
1014 && DECL_IN_SYSTEM_HEADER (newdecl)
1015 && !DECL_CLASS_SCOPE_P (newdecl)))
1017 types_match = self_promoting_args_p (p2);
1018 TREE_TYPE (newdecl) = TREE_TYPE (olddecl);
1022 types_match = compparms (p1, p2);
1027 else if (TREE_CODE (newdecl) == TEMPLATE_DECL)
1029 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl))
1030 != TREE_CODE (DECL_TEMPLATE_RESULT (olddecl)))
1033 if (!comp_template_parms (DECL_TEMPLATE_PARMS (newdecl),
1034 DECL_TEMPLATE_PARMS (olddecl)))
1037 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == TYPE_DECL)
1038 types_match = same_type_p (TREE_TYPE (DECL_TEMPLATE_RESULT (olddecl)),
1039 TREE_TYPE (DECL_TEMPLATE_RESULT (newdecl)));
1041 types_match = decls_match (DECL_TEMPLATE_RESULT (olddecl),
1042 DECL_TEMPLATE_RESULT (newdecl));
1046 if (TREE_TYPE (newdecl) == error_mark_node)
1047 types_match = TREE_TYPE (olddecl) == error_mark_node;
1048 else if (TREE_TYPE (olddecl) == NULL_TREE)
1049 types_match = TREE_TYPE (newdecl) == NULL_TREE;
1050 else if (TREE_TYPE (newdecl) == NULL_TREE)
1053 types_match = comptypes (TREE_TYPE (newdecl),
1054 TREE_TYPE (olddecl),
1055 COMPARE_REDECLARATION);
1061 /* If NEWDECL is `static' and an `extern' was seen previously,
1062 warn about it. OLDDECL is the previous declaration.
1064 Note that this does not apply to the C++ case of declaring
1065 a variable `extern const' and then later `const'.
1067 Don't complain about built-in functions, since they are beyond
1068 the user's control. */
1071 warn_extern_redeclared_static (tree newdecl, tree olddecl)
1075 if (TREE_CODE (newdecl) == TYPE_DECL
1076 || TREE_CODE (newdecl) == TEMPLATE_DECL
1077 || TREE_CODE (newdecl) == CONST_DECL
1078 || TREE_CODE (newdecl) == NAMESPACE_DECL)
1081 /* Don't get confused by static member functions; that's a different
1083 if (TREE_CODE (newdecl) == FUNCTION_DECL
1084 && DECL_STATIC_FUNCTION_P (newdecl))
1087 /* If the old declaration was `static', or the new one isn't, then
1088 then everything is OK. */
1089 if (DECL_THIS_STATIC (olddecl) || !DECL_THIS_STATIC (newdecl))
1092 /* It's OK to declare a builtin function as `static'. */
1093 if (TREE_CODE (olddecl) == FUNCTION_DECL
1094 && DECL_ARTIFICIAL (olddecl))
1097 name = DECL_ASSEMBLER_NAME (newdecl);
1098 pedwarn ("`%D' was declared `extern' and later `static'", newdecl);
1099 cp_pedwarn_at ("previous declaration of `%D'", olddecl);
1102 /* If NEWDECL is a redeclaration of OLDDECL, merge the declarations.
1103 If the redeclaration is invalid, a diagnostic is issued, and the
1104 error_mark_node is returned. Otherwise, OLDDECL is returned.
1106 If NEWDECL is not a redeclaration of OLDDECL, NULL_TREE is
1110 duplicate_decls (tree newdecl, tree olddecl)
1112 unsigned olddecl_uid = DECL_UID (olddecl);
1113 int olddecl_friend = 0, types_match = 0;
1114 int new_defines_function = 0;
1116 if (newdecl == olddecl)
1119 types_match = decls_match (newdecl, olddecl);
1121 /* If either the type of the new decl or the type of the old decl is an
1122 error_mark_node, then that implies that we have already issued an
1123 error (earlier) for some bogus type specification, and in that case,
1124 it is rather pointless to harass the user with yet more error message
1125 about the same declaration, so just pretend the types match here. */
1126 if (TREE_TYPE (newdecl) == error_mark_node
1127 || TREE_TYPE (olddecl) == error_mark_node)
1130 if (DECL_P (olddecl)
1131 && TREE_CODE (newdecl) == FUNCTION_DECL
1132 && TREE_CODE (olddecl) == FUNCTION_DECL
1133 && (DECL_UNINLINABLE (newdecl) || DECL_UNINLINABLE (olddecl)))
1135 if (DECL_DECLARED_INLINE_P (newdecl)
1136 && DECL_UNINLINABLE (newdecl)
1137 && lookup_attribute ("noinline", DECL_ATTRIBUTES (newdecl)))
1138 /* Already warned elsewhere. */;
1139 else if (DECL_DECLARED_INLINE_P (olddecl)
1140 && DECL_UNINLINABLE (olddecl)
1141 && lookup_attribute ("noinline", DECL_ATTRIBUTES (olddecl)))
1142 /* Already warned. */;
1143 else if (DECL_DECLARED_INLINE_P (newdecl)
1144 && DECL_UNINLINABLE (olddecl)
1145 && lookup_attribute ("noinline", DECL_ATTRIBUTES (olddecl)))
1147 warning ("%Jfunction '%D' redeclared as inline", newdecl, newdecl);
1148 warning ("%Jprevious declaration of '%D' with attribute noinline",
1151 else if (DECL_DECLARED_INLINE_P (olddecl)
1152 && DECL_UNINLINABLE (newdecl)
1153 && lookup_attribute ("noinline", DECL_ATTRIBUTES (newdecl)))
1155 warning ("%Jfunction '%D' redeclared with attribute noinline",
1157 warning ("%Jprevious declaration of '%D' was inline",
1162 /* Check for redeclaration and other discrepancies. */
1163 if (TREE_CODE (olddecl) == FUNCTION_DECL
1164 && DECL_ARTIFICIAL (olddecl))
1166 if (TREE_CODE (newdecl) != FUNCTION_DECL)
1168 /* Avoid warnings redeclaring anticipated built-ins. */
1169 if (DECL_ANTICIPATED (olddecl))
1172 /* If you declare a built-in or predefined function name as static,
1173 the old definition is overridden, but optionally warn this was a
1174 bad choice of name. */
1175 if (! TREE_PUBLIC (newdecl))
1178 warning ("shadowing %s function `%#D'",
1179 DECL_BUILT_IN (olddecl) ? "built-in" : "library",
1181 /* Discard the old built-in function. */
1184 /* If the built-in is not ansi, then programs can override
1185 it even globally without an error. */
1186 else if (! DECL_BUILT_IN (olddecl))
1187 warning ("library function `%#D' redeclared as non-function `%#D'",
1191 error ("declaration of `%#D'", newdecl);
1192 error ("conflicts with built-in declaration `%#D'",
1197 else if (!types_match)
1199 /* Avoid warnings redeclaring anticipated built-ins. */
1200 if (DECL_ANTICIPATED (olddecl))
1202 /* Deal with fileptr_type_node. FILE type is not known
1203 at the time we create the builtins. */
1206 for (t1 = TYPE_ARG_TYPES (TREE_TYPE (newdecl)),
1207 t2 = TYPE_ARG_TYPES (TREE_TYPE (olddecl));
1209 t1 = TREE_CHAIN (t1), t2 = TREE_CHAIN (t2))
1212 else if (TREE_VALUE (t2) == fileptr_type_node)
1214 tree t = TREE_VALUE (t1);
1216 if (TREE_CODE (t) == POINTER_TYPE
1217 && TYPE_NAME (TREE_TYPE (t))
1218 && DECL_NAME (TYPE_NAME (TREE_TYPE (t)))
1219 == get_identifier ("FILE")
1220 && compparms (TREE_CHAIN (t1), TREE_CHAIN (t2)))
1222 tree oldargs = TYPE_ARG_TYPES (TREE_TYPE (olddecl));
1224 TYPE_ARG_TYPES (TREE_TYPE (olddecl))
1225 = TYPE_ARG_TYPES (TREE_TYPE (newdecl));
1226 types_match = decls_match (newdecl, olddecl);
1228 return duplicate_decls (newdecl, olddecl);
1229 TYPE_ARG_TYPES (TREE_TYPE (olddecl)) = oldargs;
1232 else if (! same_type_p (TREE_VALUE (t1), TREE_VALUE (t2)))
1235 else if ((DECL_EXTERN_C_P (newdecl)
1236 && DECL_EXTERN_C_P (olddecl))
1237 || compparms (TYPE_ARG_TYPES (TREE_TYPE (newdecl)),
1238 TYPE_ARG_TYPES (TREE_TYPE (olddecl))))
1240 /* A near match; override the builtin. */
1242 if (TREE_PUBLIC (newdecl))
1244 warning ("new declaration `%#D'", newdecl);
1245 warning ("ambiguates built-in declaration `%#D'",
1248 else if (warn_shadow)
1249 warning ("shadowing %s function `%#D'",
1250 DECL_BUILT_IN (olddecl) ? "built-in" : "library",
1254 /* Discard the old built-in function. */
1257 /* Replace the old RTL to avoid problems with inlining. */
1258 COPY_DECL_RTL (newdecl, olddecl);
1260 /* Even if the types match, prefer the new declarations type
1261 for anticipated built-ins, for exception lists, etc... */
1262 else if (DECL_ANTICIPATED (olddecl))
1264 tree type = TREE_TYPE (newdecl);
1265 tree attribs = (*targetm.merge_type_attributes)
1266 (TREE_TYPE (olddecl), type);
1268 type = cp_build_type_attribute_variant (type, attribs);
1269 TREE_TYPE (newdecl) = TREE_TYPE (olddecl) = type;
1272 /* Whether or not the builtin can throw exceptions has no
1273 bearing on this declarator. */
1274 TREE_NOTHROW (olddecl) = 0;
1276 if (DECL_THIS_STATIC (newdecl) && !DECL_THIS_STATIC (olddecl))
1278 /* If a builtin function is redeclared as `static', merge
1279 the declarations, but make the original one static. */
1280 DECL_THIS_STATIC (olddecl) = 1;
1281 TREE_PUBLIC (olddecl) = 0;
1283 /* Make the old declaration consistent with the new one so
1284 that all remnants of the builtin-ness of this function
1285 will be banished. */
1286 SET_DECL_LANGUAGE (olddecl, DECL_LANGUAGE (newdecl));
1287 COPY_DECL_RTL (newdecl, olddecl);
1290 else if (TREE_CODE (olddecl) != TREE_CODE (newdecl))
1292 if ((TREE_CODE (olddecl) == TYPE_DECL && DECL_ARTIFICIAL (olddecl)
1293 && TREE_CODE (newdecl) != TYPE_DECL
1294 && ! (TREE_CODE (newdecl) == TEMPLATE_DECL
1295 && TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == TYPE_DECL))
1296 || (TREE_CODE (newdecl) == TYPE_DECL && DECL_ARTIFICIAL (newdecl)
1297 && TREE_CODE (olddecl) != TYPE_DECL
1298 && ! (TREE_CODE (olddecl) == TEMPLATE_DECL
1299 && (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl))
1302 /* We do nothing special here, because C++ does such nasty
1303 things with TYPE_DECLs. Instead, just let the TYPE_DECL
1304 get shadowed, and know that if we need to find a TYPE_DECL
1305 for a given name, we can look in the IDENTIFIER_TYPE_VALUE
1306 slot of the identifier. */
1310 if ((TREE_CODE (newdecl) == FUNCTION_DECL
1311 && DECL_FUNCTION_TEMPLATE_P (olddecl))
1312 || (TREE_CODE (olddecl) == FUNCTION_DECL
1313 && DECL_FUNCTION_TEMPLATE_P (newdecl)))
1316 error ("`%#D' redeclared as different kind of symbol", newdecl);
1317 if (TREE_CODE (olddecl) == TREE_LIST)
1318 olddecl = TREE_VALUE (olddecl);
1319 cp_error_at ("previous declaration of `%#D'", olddecl);
1321 return error_mark_node;
1323 else if (!types_match)
1325 if (CP_DECL_CONTEXT (newdecl) != CP_DECL_CONTEXT (olddecl))
1326 /* These are certainly not duplicate declarations; they're
1327 from different scopes. */
1330 if (TREE_CODE (newdecl) == TEMPLATE_DECL)
1332 /* The name of a class template may not be declared to refer to
1333 any other template, class, function, object, namespace, value,
1334 or type in the same scope. */
1335 if (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl)) == TYPE_DECL
1336 || TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == TYPE_DECL)
1338 error ("declaration of template `%#D'", newdecl);
1339 cp_error_at ("conflicts with previous declaration `%#D'",
1342 else if (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl)) == FUNCTION_DECL
1343 && TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == FUNCTION_DECL
1344 && compparms (TYPE_ARG_TYPES (TREE_TYPE (DECL_TEMPLATE_RESULT (olddecl))),
1345 TYPE_ARG_TYPES (TREE_TYPE (DECL_TEMPLATE_RESULT (newdecl))))
1346 && comp_template_parms (DECL_TEMPLATE_PARMS (newdecl),
1347 DECL_TEMPLATE_PARMS (olddecl))
1348 /* Template functions can be disambiguated by
1350 && same_type_p (TREE_TYPE (TREE_TYPE (newdecl)),
1351 TREE_TYPE (TREE_TYPE (olddecl))))
1353 error ("new declaration `%#D'", newdecl);
1354 cp_error_at ("ambiguates old declaration `%#D'", olddecl);
1358 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1360 if (DECL_EXTERN_C_P (newdecl) && DECL_EXTERN_C_P (olddecl))
1362 error ("declaration of C function `%#D' conflicts with",
1364 cp_error_at ("previous declaration `%#D' here", olddecl);
1366 else if (compparms (TYPE_ARG_TYPES (TREE_TYPE (newdecl)),
1367 TYPE_ARG_TYPES (TREE_TYPE (olddecl))))
1369 error ("new declaration `%#D'", newdecl);
1370 cp_error_at ("ambiguates old declaration `%#D'", olddecl);
1377 error ("conflicting declaration '%#D'", newdecl);
1378 cp_error_at ("'%D' has a previous declaration as `%#D'",
1383 else if (TREE_CODE (newdecl) == FUNCTION_DECL
1384 && ((DECL_TEMPLATE_SPECIALIZATION (olddecl)
1385 && (!DECL_TEMPLATE_INFO (newdecl)
1386 || (DECL_TI_TEMPLATE (newdecl)
1387 != DECL_TI_TEMPLATE (olddecl))))
1388 || (DECL_TEMPLATE_SPECIALIZATION (newdecl)
1389 && (!DECL_TEMPLATE_INFO (olddecl)
1390 || (DECL_TI_TEMPLATE (olddecl)
1391 != DECL_TI_TEMPLATE (newdecl))))))
1392 /* It's OK to have a template specialization and a non-template
1393 with the same type, or to have specializations of two
1394 different templates with the same type. Note that if one is a
1395 specialization, and the other is an instantiation of the same
1396 template, that we do not exit at this point. That situation
1397 can occur if we instantiate a template class, and then
1398 specialize one of its methods. This situation is valid, but
1399 the declarations must be merged in the usual way. */
1401 else if (TREE_CODE (newdecl) == FUNCTION_DECL
1402 && ((DECL_TEMPLATE_INSTANTIATION (olddecl)
1403 && !DECL_USE_TEMPLATE (newdecl))
1404 || (DECL_TEMPLATE_INSTANTIATION (newdecl)
1405 && !DECL_USE_TEMPLATE (olddecl))))
1406 /* One of the declarations is a template instantiation, and the
1407 other is not a template at all. That's OK. */
1409 else if (TREE_CODE (newdecl) == NAMESPACE_DECL)
1411 /* In [namespace.alias] we have:
1413 In a declarative region, a namespace-alias-definition can be
1414 used to redefine a namespace-alias declared in that declarative
1415 region to refer only to the namespace to which it already
1418 Therefore, if we encounter a second alias directive for the same
1419 alias, we can just ignore the second directive. */
1420 if (DECL_NAMESPACE_ALIAS (newdecl)
1421 && (DECL_NAMESPACE_ALIAS (newdecl)
1422 == DECL_NAMESPACE_ALIAS (olddecl)))
1424 /* [namespace.alias]
1426 A namespace-name or namespace-alias shall not be declared as
1427 the name of any other entity in the same declarative region.
1428 A namespace-name defined at global scope shall not be
1429 declared as the name of any other entity in any glogal scope
1431 error ("declaration of `namespace %D' conflicts with", newdecl);
1432 cp_error_at ("previous declaration of `namespace %D' here", olddecl);
1433 return error_mark_node;
1437 const char *errmsg = redeclaration_error_message (newdecl, olddecl);
1440 error (errmsg, newdecl);
1441 if (DECL_NAME (olddecl) != NULL_TREE)
1442 cp_error_at ((DECL_INITIAL (olddecl)
1443 && namespace_bindings_p ())
1444 ? "`%#D' previously defined here"
1445 : "`%#D' previously declared here", olddecl);
1446 return error_mark_node;
1448 else if (TREE_CODE (olddecl) == FUNCTION_DECL
1449 && DECL_INITIAL (olddecl) != NULL_TREE
1450 && TYPE_ARG_TYPES (TREE_TYPE (olddecl)) == NULL_TREE
1451 && TYPE_ARG_TYPES (TREE_TYPE (newdecl)) != NULL_TREE)
1453 /* Prototype decl follows defn w/o prototype. */
1454 cp_warning_at ("prototype for `%#D'", newdecl);
1455 warning ("%Jfollows non-prototype definition here", olddecl);
1457 else if (TREE_CODE (olddecl) == FUNCTION_DECL
1458 && DECL_LANGUAGE (newdecl) != DECL_LANGUAGE (olddecl))
1460 /* extern "C" int foo ();
1461 int foo () { bar (); }
1463 if (current_lang_depth () == 0)
1464 SET_DECL_LANGUAGE (newdecl, DECL_LANGUAGE (olddecl));
1467 cp_error_at ("previous declaration of `%#D' with %L linkage",
1468 olddecl, DECL_LANGUAGE (olddecl));
1469 error ("conflicts with new declaration with %L linkage",
1470 DECL_LANGUAGE (newdecl));
1474 if (DECL_LANG_SPECIFIC (olddecl) && DECL_USE_TEMPLATE (olddecl))
1476 else if (TREE_CODE (olddecl) == FUNCTION_DECL)
1478 tree t1 = TYPE_ARG_TYPES (TREE_TYPE (olddecl));
1479 tree t2 = TYPE_ARG_TYPES (TREE_TYPE (newdecl));
1482 if (TREE_CODE (TREE_TYPE (newdecl)) == METHOD_TYPE)
1483 t1 = TREE_CHAIN (t1), t2 = TREE_CHAIN (t2);
1485 for (; t1 && t1 != void_list_node;
1486 t1 = TREE_CHAIN (t1), t2 = TREE_CHAIN (t2), i++)
1487 if (TREE_PURPOSE (t1) && TREE_PURPOSE (t2))
1489 if (1 == simple_cst_equal (TREE_PURPOSE (t1),
1492 pedwarn ("default argument given for parameter %d of `%#D'",
1494 cp_pedwarn_at ("after previous specification in `%#D'",
1499 error ("default argument given for parameter %d of `%#D'",
1501 cp_error_at ("after previous specification in `%#D'",
1506 if (DECL_DECLARED_INLINE_P (newdecl)
1507 && ! DECL_DECLARED_INLINE_P (olddecl)
1508 && TREE_ADDRESSABLE (olddecl) && warn_inline)
1510 warning ("`%#D' was used before it was declared inline", newdecl);
1511 warning ("%Jprevious non-inline declaration here", olddecl);
1516 /* Do not merge an implicit typedef with an explicit one. In:
1520 typedef class A A __attribute__ ((foo));
1522 the attribute should apply only to the typedef. */
1523 if (TREE_CODE (olddecl) == TYPE_DECL
1524 && (DECL_IMPLICIT_TYPEDEF_P (olddecl)
1525 || DECL_IMPLICIT_TYPEDEF_P (newdecl)))
1528 /* If new decl is `static' and an `extern' was seen previously,
1530 warn_extern_redeclared_static (newdecl, olddecl);
1532 /* We have committed to returning 1 at this point. */
1533 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1535 /* Now that functions must hold information normally held
1536 by field decls, there is extra work to do so that
1537 declaration information does not get destroyed during
1539 if (DECL_VINDEX (olddecl))
1540 DECL_VINDEX (newdecl) = DECL_VINDEX (olddecl);
1541 if (DECL_CONTEXT (olddecl))
1542 DECL_CONTEXT (newdecl) = DECL_CONTEXT (olddecl);
1543 DECL_STATIC_CONSTRUCTOR (newdecl) |= DECL_STATIC_CONSTRUCTOR (olddecl);
1544 DECL_STATIC_DESTRUCTOR (newdecl) |= DECL_STATIC_DESTRUCTOR (olddecl);
1545 DECL_PURE_VIRTUAL_P (newdecl) |= DECL_PURE_VIRTUAL_P (olddecl);
1546 DECL_VIRTUAL_P (newdecl) |= DECL_VIRTUAL_P (olddecl);
1547 DECL_NEEDS_FINAL_OVERRIDER_P (newdecl) |= DECL_NEEDS_FINAL_OVERRIDER_P (olddecl);
1548 DECL_THIS_STATIC (newdecl) |= DECL_THIS_STATIC (olddecl);
1549 if (DECL_OVERLOADED_OPERATOR_P (olddecl) != ERROR_MARK)
1550 SET_OVERLOADED_OPERATOR_CODE
1551 (newdecl, DECL_OVERLOADED_OPERATOR_P (olddecl));
1552 new_defines_function = DECL_INITIAL (newdecl) != NULL_TREE;
1554 /* Optionally warn about more than one declaration for the same
1555 name, but don't warn about a function declaration followed by a
1557 if (warn_redundant_decls && ! DECL_ARTIFICIAL (olddecl)
1558 && !(new_defines_function && DECL_INITIAL (olddecl) == NULL_TREE)
1559 /* Don't warn about extern decl followed by definition. */
1560 && !(DECL_EXTERNAL (olddecl) && ! DECL_EXTERNAL (newdecl))
1561 /* Don't warn about friends, let add_friend take care of it. */
1562 && ! (DECL_FRIEND_P (newdecl) || DECL_FRIEND_P (olddecl)))
1564 warning ("redundant redeclaration of `%D' in same scope", newdecl);
1565 cp_warning_at ("previous declaration of `%D'", olddecl);
1569 /* Deal with C++: must preserve virtual function table size. */
1570 if (TREE_CODE (olddecl) == TYPE_DECL)
1572 tree newtype = TREE_TYPE (newdecl);
1573 tree oldtype = TREE_TYPE (olddecl);
1575 if (newtype != error_mark_node && oldtype != error_mark_node
1576 && TYPE_LANG_SPECIFIC (newtype) && TYPE_LANG_SPECIFIC (oldtype))
1577 CLASSTYPE_FRIEND_CLASSES (newtype)
1578 = CLASSTYPE_FRIEND_CLASSES (oldtype);
1580 DECL_ORIGINAL_TYPE (newdecl) = DECL_ORIGINAL_TYPE (olddecl);
1583 /* Copy all the DECL_... slots specified in the new decl
1584 except for any that we copy here from the old type. */
1585 DECL_ATTRIBUTES (newdecl)
1586 = (*targetm.merge_decl_attributes) (olddecl, newdecl);
1588 if (TREE_CODE (newdecl) == TEMPLATE_DECL)
1590 TREE_TYPE (olddecl) = TREE_TYPE (DECL_TEMPLATE_RESULT (olddecl));
1591 DECL_TEMPLATE_SPECIALIZATIONS (olddecl)
1592 = chainon (DECL_TEMPLATE_SPECIALIZATIONS (olddecl),
1593 DECL_TEMPLATE_SPECIALIZATIONS (newdecl));
1595 /* If the new declaration is a definition, update the file and
1596 line information on the declaration. */
1597 if (DECL_INITIAL (DECL_TEMPLATE_RESULT (olddecl)) == NULL_TREE
1598 && DECL_INITIAL (DECL_TEMPLATE_RESULT (newdecl)) != NULL_TREE)
1600 DECL_SOURCE_LOCATION (olddecl)
1601 = DECL_SOURCE_LOCATION (DECL_TEMPLATE_RESULT (olddecl))
1602 = DECL_SOURCE_LOCATION (newdecl);
1603 if (DECL_FUNCTION_TEMPLATE_P (newdecl))
1604 DECL_ARGUMENTS (DECL_TEMPLATE_RESULT (olddecl))
1605 = DECL_ARGUMENTS (DECL_TEMPLATE_RESULT (newdecl));
1608 if (DECL_FUNCTION_TEMPLATE_P (newdecl))
1610 DECL_INLINE (DECL_TEMPLATE_RESULT (olddecl))
1611 |= DECL_INLINE (DECL_TEMPLATE_RESULT (newdecl));
1612 DECL_DECLARED_INLINE_P (DECL_TEMPLATE_RESULT (olddecl))
1613 |= DECL_DECLARED_INLINE_P (DECL_TEMPLATE_RESULT (newdecl));
1621 /* Automatically handles default parameters. */
1622 tree oldtype = TREE_TYPE (olddecl);
1625 /* Merge the data types specified in the two decls. */
1626 newtype = merge_types (TREE_TYPE (newdecl), TREE_TYPE (olddecl));
1628 /* If merge_types produces a non-typedef type, just use the old type. */
1629 if (TREE_CODE (newdecl) == TYPE_DECL
1630 && newtype == DECL_ORIGINAL_TYPE (newdecl))
1633 if (TREE_CODE (newdecl) == VAR_DECL)
1635 DECL_THIS_EXTERN (newdecl) |= DECL_THIS_EXTERN (olddecl);
1636 DECL_INITIALIZED_P (newdecl) |= DECL_INITIALIZED_P (olddecl);
1637 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (newdecl)
1638 |= DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (olddecl);
1641 /* Do this after calling `merge_types' so that default
1642 parameters don't confuse us. */
1643 else if (TREE_CODE (newdecl) == FUNCTION_DECL
1644 && (TYPE_RAISES_EXCEPTIONS (TREE_TYPE (newdecl))
1645 != TYPE_RAISES_EXCEPTIONS (TREE_TYPE (olddecl))))
1647 TREE_TYPE (newdecl) = build_exception_variant (newtype,
1648 TYPE_RAISES_EXCEPTIONS (TREE_TYPE (newdecl)));
1649 TREE_TYPE (olddecl) = build_exception_variant (newtype,
1650 TYPE_RAISES_EXCEPTIONS (oldtype));
1652 if ((pedantic || ! DECL_IN_SYSTEM_HEADER (olddecl))
1653 && ! DECL_IS_BUILTIN (olddecl)
1655 && !comp_except_specs (TYPE_RAISES_EXCEPTIONS (TREE_TYPE (newdecl)),
1656 TYPE_RAISES_EXCEPTIONS (TREE_TYPE (olddecl)), 1))
1658 error ("declaration of `%F' throws different exceptions",
1660 cp_error_at ("than previous declaration `%F'", olddecl);
1663 TREE_TYPE (newdecl) = TREE_TYPE (olddecl) = newtype;
1665 /* Lay the type out, unless already done. */
1666 if (! same_type_p (newtype, oldtype)
1667 && TREE_TYPE (newdecl) != error_mark_node
1668 && !(processing_template_decl && uses_template_parms (newdecl)))
1669 layout_type (TREE_TYPE (newdecl));
1671 if ((TREE_CODE (newdecl) == VAR_DECL
1672 || TREE_CODE (newdecl) == PARM_DECL
1673 || TREE_CODE (newdecl) == RESULT_DECL
1674 || TREE_CODE (newdecl) == FIELD_DECL
1675 || TREE_CODE (newdecl) == TYPE_DECL)
1676 && !(processing_template_decl && uses_template_parms (newdecl)))
1677 layout_decl (newdecl, 0);
1679 /* Merge the type qualifiers. */
1680 if (TREE_READONLY (newdecl))
1681 TREE_READONLY (olddecl) = 1;
1682 if (TREE_THIS_VOLATILE (newdecl))
1683 TREE_THIS_VOLATILE (olddecl) = 1;
1685 /* Merge the initialization information. */
1686 if (DECL_INITIAL (newdecl) == NULL_TREE
1687 && DECL_INITIAL (olddecl) != NULL_TREE)
1689 DECL_INITIAL (newdecl) = DECL_INITIAL (olddecl);
1690 DECL_SOURCE_LOCATION (newdecl) = DECL_SOURCE_LOCATION (olddecl);
1691 if (CAN_HAVE_FULL_LANG_DECL_P (newdecl)
1692 && DECL_LANG_SPECIFIC (newdecl)
1693 && DECL_LANG_SPECIFIC (olddecl))
1695 DECL_SAVED_TREE (newdecl) = DECL_SAVED_TREE (olddecl);
1696 DECL_STRUCT_FUNCTION (newdecl) = DECL_STRUCT_FUNCTION (olddecl);
1700 /* Merge the section attribute.
1701 We want to issue an error if the sections conflict but that must be
1702 done later in decl_attributes since we are called before attributes
1704 if (DECL_SECTION_NAME (newdecl) == NULL_TREE)
1705 DECL_SECTION_NAME (newdecl) = DECL_SECTION_NAME (olddecl);
1707 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1709 DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (newdecl)
1710 |= DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (olddecl);
1711 DECL_NO_LIMIT_STACK (newdecl) |= DECL_NO_LIMIT_STACK (olddecl);
1712 TREE_THIS_VOLATILE (newdecl) |= TREE_THIS_VOLATILE (olddecl);
1713 TREE_READONLY (newdecl) |= TREE_READONLY (olddecl);
1714 TREE_NOTHROW (newdecl) |= TREE_NOTHROW (olddecl);
1715 DECL_IS_MALLOC (newdecl) |= DECL_IS_MALLOC (olddecl);
1716 DECL_IS_PURE (newdecl) |= DECL_IS_PURE (olddecl);
1717 /* Keep the old RTL. */
1718 COPY_DECL_RTL (olddecl, newdecl);
1720 else if (TREE_CODE (newdecl) == VAR_DECL
1721 && (DECL_SIZE (olddecl) || !DECL_SIZE (newdecl)))
1723 /* Keep the old RTL. We cannot keep the old RTL if the old
1724 declaration was for an incomplete object and the new
1725 declaration is not since many attributes of the RTL will
1727 COPY_DECL_RTL (olddecl, newdecl);
1730 /* If cannot merge, then use the new type and qualifiers,
1731 and don't preserve the old rtl. */
1734 /* Clean out any memory we had of the old declaration. */
1735 tree oldstatic = value_member (olddecl, static_aggregates);
1737 TREE_VALUE (oldstatic) = error_mark_node;
1739 TREE_TYPE (olddecl) = TREE_TYPE (newdecl);
1740 TREE_READONLY (olddecl) = TREE_READONLY (newdecl);
1741 TREE_THIS_VOLATILE (olddecl) = TREE_THIS_VOLATILE (newdecl);
1742 TREE_SIDE_EFFECTS (olddecl) = TREE_SIDE_EFFECTS (newdecl);
1745 /* Merge the storage class information. */
1746 merge_weak (newdecl, olddecl);
1748 DECL_ONE_ONLY (newdecl) |= DECL_ONE_ONLY (olddecl);
1749 DECL_DEFER_OUTPUT (newdecl) |= DECL_DEFER_OUTPUT (olddecl);
1750 TREE_PUBLIC (newdecl) = TREE_PUBLIC (olddecl);
1751 TREE_STATIC (olddecl) = TREE_STATIC (newdecl) |= TREE_STATIC (olddecl);
1752 if (! DECL_EXTERNAL (olddecl))
1753 DECL_EXTERNAL (newdecl) = 0;
1755 if (DECL_LANG_SPECIFIC (newdecl) && DECL_LANG_SPECIFIC (olddecl))
1757 DECL_INTERFACE_KNOWN (newdecl) |= DECL_INTERFACE_KNOWN (olddecl);
1758 DECL_NOT_REALLY_EXTERN (newdecl) |= DECL_NOT_REALLY_EXTERN (olddecl);
1759 DECL_COMDAT (newdecl) |= DECL_COMDAT (olddecl);
1760 DECL_TEMPLATE_INSTANTIATED (newdecl)
1761 |= DECL_TEMPLATE_INSTANTIATED (olddecl);
1762 /* Don't really know how much of the language-specific
1763 values we should copy from old to new. */
1764 DECL_IN_AGGR_P (newdecl) = DECL_IN_AGGR_P (olddecl);
1765 DECL_LANG_SPECIFIC (newdecl)->decl_flags.u2 =
1766 DECL_LANG_SPECIFIC (olddecl)->decl_flags.u2;
1767 DECL_NONCONVERTING_P (newdecl) = DECL_NONCONVERTING_P (olddecl);
1768 DECL_REPO_AVAILABLE_P (newdecl) = DECL_REPO_AVAILABLE_P (olddecl);
1769 DECL_TEMPLATE_INFO (newdecl) = DECL_TEMPLATE_INFO (olddecl);
1770 DECL_INITIALIZED_IN_CLASS_P (newdecl)
1771 |= DECL_INITIALIZED_IN_CLASS_P (olddecl);
1772 olddecl_friend = DECL_FRIEND_P (olddecl);
1774 /* Only functions have DECL_BEFRIENDING_CLASSES. */
1775 if (TREE_CODE (newdecl) == FUNCTION_DECL
1776 || DECL_FUNCTION_TEMPLATE_P (newdecl))
1778 DECL_BEFRIENDING_CLASSES (newdecl)
1779 = chainon (DECL_BEFRIENDING_CLASSES (newdecl),
1780 DECL_BEFRIENDING_CLASSES (olddecl));
1781 /* DECL_THUNKS is only valid for virtual functions,
1782 otherwise it is a DECL_FRIEND_CONTEXT. */
1783 if (DECL_VIRTUAL_P (newdecl))
1784 DECL_THUNKS (newdecl) = DECL_THUNKS (olddecl);
1788 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1790 if (DECL_TEMPLATE_INSTANTIATION (olddecl)
1791 && !DECL_TEMPLATE_INSTANTIATION (newdecl))
1793 /* If newdecl is not a specialization, then it is not a
1794 template-related function at all. And that means that we
1795 should have exited above, returning 0. */
1796 my_friendly_assert (DECL_TEMPLATE_SPECIALIZATION (newdecl),
1799 if (TREE_USED (olddecl))
1800 /* From [temp.expl.spec]:
1802 If a template, a member template or the member of a class
1803 template is explicitly specialized then that
1804 specialization shall be declared before the first use of
1805 that specialization that would cause an implicit
1806 instantiation to take place, in every translation unit in
1807 which such a use occurs. */
1808 error ("explicit specialization of %D after first use",
1811 SET_DECL_TEMPLATE_SPECIALIZATION (olddecl);
1813 /* [temp.expl.spec/14] We don't inline explicit specialization
1814 just because the primary template says so. */
1818 if (DECL_PENDING_INLINE_INFO (newdecl) == 0)
1819 DECL_PENDING_INLINE_INFO (newdecl) = DECL_PENDING_INLINE_INFO (olddecl);
1821 DECL_DECLARED_INLINE_P (newdecl) |= DECL_DECLARED_INLINE_P (olddecl);
1823 /* If either decl says `inline', this fn is inline, unless
1824 its definition was passed already. */
1825 if (DECL_INLINE (newdecl) && DECL_INITIAL (olddecl) == NULL_TREE)
1826 DECL_INLINE (olddecl) = 1;
1827 DECL_INLINE (newdecl) = DECL_INLINE (olddecl);
1829 DECL_UNINLINABLE (newdecl) = DECL_UNINLINABLE (olddecl)
1830 = (DECL_UNINLINABLE (newdecl) || DECL_UNINLINABLE (olddecl));
1833 /* Preserve abstractness on cloned [cd]tors. */
1834 DECL_ABSTRACT (newdecl) = DECL_ABSTRACT (olddecl);
1838 SET_DECL_LANGUAGE (olddecl, DECL_LANGUAGE (newdecl));
1839 COPY_DECL_ASSEMBLER_NAME (newdecl, olddecl);
1840 COPY_DECL_RTL (newdecl, olddecl);
1842 if (! types_match || new_defines_function)
1844 /* These need to be copied so that the names are available.
1845 Note that if the types do match, we'll preserve inline
1846 info and other bits, but if not, we won't. */
1847 DECL_ARGUMENTS (olddecl) = DECL_ARGUMENTS (newdecl);
1848 DECL_RESULT (olddecl) = DECL_RESULT (newdecl);
1850 if (new_defines_function)
1851 /* If defining a function declared with other language
1852 linkage, use the previously declared language linkage. */
1853 SET_DECL_LANGUAGE (newdecl, DECL_LANGUAGE (olddecl));
1854 else if (types_match)
1856 /* If redeclaring a builtin function, and not a definition,
1857 it stays built in. */
1858 if (DECL_BUILT_IN (olddecl))
1860 DECL_BUILT_IN_CLASS (newdecl) = DECL_BUILT_IN_CLASS (olddecl);
1861 DECL_FUNCTION_CODE (newdecl) = DECL_FUNCTION_CODE (olddecl);
1862 /* If we're keeping the built-in definition, keep the rtl,
1863 regardless of declaration matches. */
1864 COPY_DECL_RTL (olddecl, newdecl);
1867 DECL_RESULT (newdecl) = DECL_RESULT (olddecl);
1868 /* Don't clear out the arguments if we're redefining a function. */
1869 if (DECL_ARGUMENTS (olddecl))
1870 DECL_ARGUMENTS (newdecl) = DECL_ARGUMENTS (olddecl);
1873 else if (TREE_CODE (newdecl) == NAMESPACE_DECL)
1874 NAMESPACE_LEVEL (newdecl) = NAMESPACE_LEVEL (olddecl);
1876 /* Now preserve various other info from the definition. */
1877 TREE_ADDRESSABLE (newdecl) = TREE_ADDRESSABLE (olddecl);
1878 TREE_ASM_WRITTEN (newdecl) = TREE_ASM_WRITTEN (olddecl);
1879 DECL_COMMON (newdecl) = DECL_COMMON (olddecl);
1880 COPY_DECL_ASSEMBLER_NAME (olddecl, newdecl);
1882 /* Warn about conflicting visibility specifications. */
1883 if (DECL_VISIBILITY_SPECIFIED (olddecl)
1884 && DECL_VISIBILITY_SPECIFIED (newdecl)
1885 && DECL_VISIBILITY (newdecl) != DECL_VISIBILITY (olddecl))
1887 warning ("%J'%D': visibility attribute ignored because it",
1889 warning ("%Jconflicts with previous declaration here", olddecl);
1891 /* Choose the declaration which specified visibility. */
1892 if (DECL_VISIBILITY_SPECIFIED (olddecl))
1894 DECL_VISIBILITY (newdecl) = DECL_VISIBILITY (olddecl);
1895 DECL_VISIBILITY_SPECIFIED (newdecl) = 1;
1898 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1902 function_size = sizeof (struct tree_decl);
1904 memcpy ((char *) olddecl + sizeof (struct tree_common),
1905 (char *) newdecl + sizeof (struct tree_common),
1906 function_size - sizeof (struct tree_common));
1908 if (DECL_TEMPLATE_INSTANTIATION (newdecl))
1909 /* If newdecl is a template instantiation, it is possible that
1910 the following sequence of events has occurred:
1912 o A friend function was declared in a class template. The
1913 class template was instantiated.
1915 o The instantiation of the friend declaration was
1916 recorded on the instantiation list, and is newdecl.
1918 o Later, however, instantiate_class_template called pushdecl
1919 on the newdecl to perform name injection. But, pushdecl in
1920 turn called duplicate_decls when it discovered that another
1921 declaration of a global function with the same name already
1924 o Here, in duplicate_decls, we decided to clobber newdecl.
1926 If we're going to do that, we'd better make sure that
1927 olddecl, and not newdecl, is on the list of
1928 instantiations so that if we try to do the instantiation
1929 again we won't get the clobbered declaration. */
1930 reregister_specialization (newdecl,
1931 DECL_TI_TEMPLATE (newdecl),
1936 memcpy ((char *) olddecl + sizeof (struct tree_common),
1937 (char *) newdecl + sizeof (struct tree_common),
1938 sizeof (struct tree_decl) - sizeof (struct tree_common)
1939 + TREE_CODE_LENGTH (TREE_CODE (newdecl)) * sizeof (char *));
1942 DECL_UID (olddecl) = olddecl_uid;
1944 DECL_FRIEND_P (olddecl) = 1;
1946 /* NEWDECL contains the merged attribute lists.
1947 Update OLDDECL to be the same. */
1948 DECL_ATTRIBUTES (olddecl) = DECL_ATTRIBUTES (newdecl);
1950 /* If OLDDECL had its DECL_RTL instantiated, re-invoke make_decl_rtl
1951 so that encode_section_info has a chance to look at the new decl
1952 flags and attributes. */
1953 if (DECL_RTL_SET_P (olddecl)
1954 && (TREE_CODE (olddecl) == FUNCTION_DECL
1955 || (TREE_CODE (olddecl) == VAR_DECL
1956 && TREE_STATIC (olddecl))))
1957 make_decl_rtl (olddecl);
1962 /* Return zero if the declaration NEWDECL is valid
1963 when the declaration OLDDECL (assumed to be for the same name)
1964 has already been seen.
1965 Otherwise return an error message format string with a %s
1966 where the identifier should go. */
1969 redeclaration_error_message (tree newdecl, tree olddecl)
1971 if (TREE_CODE (newdecl) == TYPE_DECL)
1973 /* Because C++ can put things into name space for free,
1974 constructs like "typedef struct foo { ... } foo"
1975 would look like an erroneous redeclaration. */
1976 if (same_type_p (TREE_TYPE (newdecl), TREE_TYPE (olddecl)))
1979 return "redefinition of `%#D'";
1981 else if (TREE_CODE (newdecl) == FUNCTION_DECL)
1983 /* If this is a pure function, its olddecl will actually be
1984 the original initialization to `0' (which we force to call
1985 abort()). Don't complain about redefinition in this case. */
1986 if (DECL_LANG_SPECIFIC (olddecl) && DECL_PURE_VIRTUAL_P (olddecl))
1989 /* If both functions come from different namespaces, this is not
1990 a redeclaration - this is a conflict with a used function. */
1991 if (DECL_NAMESPACE_SCOPE_P (olddecl)
1992 && DECL_CONTEXT (olddecl) != DECL_CONTEXT (newdecl))
1993 return "`%D' conflicts with used function";
1995 /* We'll complain about linkage mismatches in
1996 warn_extern_redeclared_static. */
1998 /* Defining the same name twice is no good. */
1999 if (DECL_INITIAL (olddecl) != NULL_TREE
2000 && DECL_INITIAL (newdecl) != NULL_TREE)
2002 if (DECL_NAME (olddecl) == NULL_TREE)
2003 return "`%#D' not declared in class";
2005 return "redefinition of `%#D'";
2009 else if (TREE_CODE (newdecl) == TEMPLATE_DECL)
2013 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == TYPE_DECL)
2015 if (COMPLETE_TYPE_P (TREE_TYPE (newdecl))
2016 && COMPLETE_TYPE_P (TREE_TYPE (olddecl)))
2017 return "redefinition of `%#D'";
2021 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) != FUNCTION_DECL
2022 || (DECL_TEMPLATE_RESULT (newdecl)
2023 == DECL_TEMPLATE_RESULT (olddecl)))
2026 nt = DECL_TEMPLATE_RESULT (newdecl);
2027 if (DECL_TEMPLATE_INFO (nt))
2028 nt = DECL_TEMPLATE_RESULT (template_for_substitution (nt));
2029 ot = DECL_TEMPLATE_RESULT (olddecl);
2030 if (DECL_TEMPLATE_INFO (ot))
2031 ot = DECL_TEMPLATE_RESULT (template_for_substitution (ot));
2032 if (DECL_INITIAL (nt) && DECL_INITIAL (ot))
2033 return "redefinition of `%#D'";
2037 else if (toplevel_bindings_p () || DECL_NAMESPACE_SCOPE_P (newdecl))
2039 /* Objects declared at top level: */
2040 /* If at least one is a reference, it's ok. */
2041 if (DECL_EXTERNAL (newdecl) || DECL_EXTERNAL (olddecl))
2043 /* Reject two definitions. */
2044 return "redefinition of `%#D'";
2048 /* Objects declared with block scope: */
2049 /* Reject two definitions, and reject a definition
2050 together with an external reference. */
2051 if (!(DECL_EXTERNAL (newdecl) && DECL_EXTERNAL (olddecl)))
2052 return "redeclaration of `%#D'";
2057 /* Create a new label, named ID. */
2060 make_label_decl (tree id, int local_p)
2064 decl = build_decl (LABEL_DECL, id, void_type_node);
2066 DECL_CONTEXT (decl) = current_function_decl;
2067 DECL_MODE (decl) = VOIDmode;
2068 C_DECLARED_LABEL_FLAG (decl) = local_p;
2070 /* Say where one reference is to the label, for the sake of the
2071 error if it is not defined. */
2072 DECL_SOURCE_LOCATION (decl) = input_location;
2074 /* Record the fact that this identifier is bound to this label. */
2075 SET_IDENTIFIER_LABEL_VALUE (id, decl);
2080 /* Record this label on the list of used labels so that we can check
2081 at the end of the function to see whether or not the label was
2082 actually defined, and so we can check when the label is defined whether
2083 this use is valid. */
2086 use_label (tree decl)
2088 if (named_label_uses == NULL
2089 || named_label_uses->names_in_scope != current_binding_level->names
2090 || named_label_uses->label_decl != decl)
2092 struct named_label_use_list *new_ent;
2093 new_ent = GGC_NEW (struct named_label_use_list);
2094 new_ent->label_decl = decl;
2095 new_ent->names_in_scope = current_binding_level->names;
2096 new_ent->binding_level = current_binding_level;
2097 new_ent->o_goto_locus = input_location;
2098 new_ent->next = named_label_uses;
2099 named_label_uses = new_ent;
2103 /* Look for a label named ID in the current function. If one cannot
2104 be found, create one. (We keep track of used, but undefined,
2105 labels, and complain about them at the end of a function.) */
2108 lookup_label (tree id)
2111 struct named_label_list *ent;
2113 timevar_push (TV_NAME_LOOKUP);
2114 /* You can't use labels at global scope. */
2115 if (current_function_decl == NULL_TREE)
2117 error ("label `%E' referenced outside of any function", id);
2118 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, NULL_TREE);
2121 /* See if we've already got this label. */
2122 decl = IDENTIFIER_LABEL_VALUE (id);
2123 if (decl != NULL_TREE && DECL_CONTEXT (decl) == current_function_decl)
2124 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, decl);
2126 /* Record this label on the list of labels used in this function.
2127 We do this before calling make_label_decl so that we get the
2128 IDENTIFIER_LABEL_VALUE before the new label is declared. */
2129 ent = GGC_CNEW (struct named_label_list);
2130 ent->old_value = IDENTIFIER_LABEL_VALUE (id);
2131 ent->next = named_labels;
2134 /* We need a new label. */
2135 decl = make_label_decl (id, /*local_p=*/0);
2137 /* Now fill in the information we didn't have before. */
2138 ent->label_decl = decl;
2140 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, decl);
2143 /* Declare a local label named ID. */
2146 declare_local_label (tree id)
2150 /* Add a new entry to the SHADOWED_LABELS list so that when we leave
2151 this scope we can restore the old value of
2152 IDENTIFIER_TYPE_VALUE. */
2153 current_binding_level->shadowed_labels
2154 = tree_cons (IDENTIFIER_LABEL_VALUE (id), NULL_TREE,
2155 current_binding_level->shadowed_labels);
2156 /* Look for the label. */
2157 decl = make_label_decl (id, /*local_p=*/1);
2158 /* Now fill in the information we didn't have before. */
2159 TREE_VALUE (current_binding_level->shadowed_labels) = decl;
2164 /* Returns nonzero if it is ill-formed to jump past the declaration of
2165 DECL. Returns 2 if it's also a real problem. */
2168 decl_jump_unsafe (tree decl)
2170 if (TREE_CODE (decl) != VAR_DECL || TREE_STATIC (decl))
2173 if (DECL_INITIAL (decl) == NULL_TREE
2174 && pod_type_p (TREE_TYPE (decl)))
2177 /* This is really only important if we're crossing an initialization.
2178 The POD stuff is just pedantry; why should it matter if the class
2179 contains a field of pointer to member type? */
2180 if (DECL_INITIAL (decl)
2181 || (TYPE_NEEDS_CONSTRUCTING (TREE_TYPE (decl))))
2186 /* Check that a single previously seen jump to a newly defined label
2187 is OK. DECL is the LABEL_DECL or 0; LEVEL is the binding_level for
2188 the jump context; NAMES are the names in scope in LEVEL at the jump
2189 context; FILE and LINE are the source position of the jump or 0. */
2192 check_previous_goto_1 (tree decl,
2193 struct cp_binding_level* level,
2194 tree names, const location_t *locus)
2198 struct cp_binding_level *b = current_binding_level;
2199 for (; b; b = b->level_chain)
2201 tree new_decls = b->names;
2202 tree old_decls = (b == level ? names : NULL_TREE);
2203 for (; new_decls != old_decls;
2204 new_decls = TREE_CHAIN (new_decls))
2206 int problem = decl_jump_unsafe (new_decls);
2213 pedwarn ("jump to label `%D'", decl);
2215 pedwarn ("jump to case label");
2218 pedwarn ("%H from here", locus);
2223 cp_error_at (" crosses initialization of `%#D'",
2226 cp_pedwarn_at (" enters scope of non-POD `%#D'",
2232 if ((b->kind == sk_try || b->kind == sk_catch) && ! saw_eh)
2237 pedwarn ("jump to label `%D'", decl);
2239 pedwarn ("jump to case label");
2242 pedwarn ("%H from here", locus);
2245 if (b->kind == sk_try)
2246 error (" enters try block");
2248 error (" enters catch block");
2255 check_previous_goto (struct named_label_use_list* use)
2257 check_previous_goto_1 (use->label_decl, use->binding_level,
2258 use->names_in_scope, &use->o_goto_locus);
2262 check_switch_goto (struct cp_binding_level* level)
2264 check_previous_goto_1 (NULL_TREE, level, level->names, NULL);
2267 /* Check that any previously seen jumps to a newly defined label DECL
2268 are OK. Called by define_label. */
2271 check_previous_gotos (tree decl)
2273 struct named_label_use_list **usep;
2275 if (! TREE_USED (decl))
2278 for (usep = &named_label_uses; *usep; )
2280 struct named_label_use_list *use = *usep;
2281 if (use->label_decl == decl)
2283 check_previous_goto (use);
2287 usep = &(use->next);
2291 /* Check that a new jump to a label DECL is OK. Called by
2292 finish_goto_stmt. */
2295 check_goto (tree decl)
2299 struct named_label_list *lab;
2301 /* We can't know where a computed goto is jumping. So we assume
2303 if (! DECL_P (decl))
2306 /* If the label hasn't been defined yet, defer checking. */
2307 if (! DECL_INITIAL (decl))
2313 for (lab = named_labels; lab; lab = lab->next)
2314 if (decl == lab->label_decl)
2317 /* If the label is not on named_labels it's a gcc local label, so
2318 it must be in an outer scope, so jumping to it is always OK. */
2322 if ((lab->in_try_scope || lab->in_catch_scope || lab->bad_decls)
2325 cp_pedwarn_at ("jump to label `%D'", decl);
2326 pedwarn (" from here");
2330 for (bad = lab->bad_decls; bad; bad = TREE_CHAIN (bad))
2332 tree b = TREE_VALUE (bad);
2333 int u = decl_jump_unsafe (b);
2335 if (u > 1 && DECL_ARTIFICIAL (b))
2336 /* Can't skip init of __exception_info. */
2337 error ("%J enters catch block", b);
2339 cp_error_at (" skips initialization of `%#D'", b);
2341 cp_pedwarn_at (" enters scope of non-POD `%#D'", b);
2344 if (lab->in_try_scope)
2345 error (" enters try block");
2346 else if (lab->in_catch_scope)
2347 error (" enters catch block");
2350 /* Define a label, specifying the location in the source file.
2351 Return the LABEL_DECL node for the label. */
2354 define_label (location_t location, tree name)
2356 tree decl = lookup_label (name);
2357 struct named_label_list *ent;
2358 struct cp_binding_level *p;
2360 timevar_push (TV_NAME_LOOKUP);
2361 for (ent = named_labels; ent; ent = ent->next)
2362 if (ent->label_decl == decl)
2365 /* After labels, make any new cleanups in the function go into their
2366 own new (temporary) binding contour. */
2367 for (p = current_binding_level;
2368 p->kind != sk_function_parms;
2370 p->more_cleanups_ok = 0;
2372 if (name == get_identifier ("wchar_t"))
2373 pedwarn ("label named wchar_t");
2375 if (DECL_INITIAL (decl) != NULL_TREE)
2376 error ("duplicate label `%D'", decl);
2379 /* Mark label as having been defined. */
2380 DECL_INITIAL (decl) = error_mark_node;
2381 /* Say where in the source. */
2382 DECL_SOURCE_LOCATION (decl) = location;
2385 ent->names_in_scope = current_binding_level->names;
2386 ent->binding_level = current_binding_level;
2388 check_previous_gotos (decl);
2391 timevar_pop (TV_NAME_LOOKUP);
2397 struct cp_binding_level *level;
2398 struct cp_switch *next;
2399 /* The SWITCH_STMT being built. */
2401 /* A splay-tree mapping the low element of a case range to the high
2402 element, or NULL_TREE if there is no high element. Used to
2403 determine whether or not a new case label duplicates an old case
2404 label. We need a tree, rather than simply a hash table, because
2405 of the GNU case range extension. */
2409 /* A stack of the currently active switch statements. The innermost
2410 switch statement is on the top of the stack. There is no need to
2411 mark the stack for garbage collection because it is only active
2412 during the processing of the body of a function, and we never
2413 collect at that point. */
2415 static struct cp_switch *switch_stack;
2417 /* Called right after a switch-statement condition is parsed.
2418 SWITCH_STMT is the switch statement being parsed. */
2421 push_switch (tree switch_stmt)
2423 struct cp_switch *p = xmalloc (sizeof (struct cp_switch));
2424 p->level = current_binding_level;
2425 p->next = switch_stack;
2426 p->switch_stmt = switch_stmt;
2427 p->cases = splay_tree_new (case_compare, NULL, NULL);
2434 struct cp_switch *cs = switch_stack;
2436 /* Emit warnings as needed. */
2437 c_do_switch_warnings (cs->cases, cs->switch_stmt);
2439 splay_tree_delete (cs->cases);
2440 switch_stack = switch_stack->next;
2444 /* Note that we've seen a definition of a case label, and complain if this
2445 is a bad place for one. */
2448 finish_case_label (tree low_value, tree high_value)
2451 struct cp_binding_level *p;
2453 if (processing_template_decl)
2457 /* For templates, just add the case label; we'll do semantic
2458 analysis at instantiation-time. */
2459 label = build_decl (LABEL_DECL, NULL_TREE, NULL_TREE);
2460 return add_stmt (build_case_label (low_value, high_value, label));
2463 /* Find the condition on which this switch statement depends. */
2464 cond = SWITCH_COND (switch_stack->switch_stmt);
2465 if (cond && TREE_CODE (cond) == TREE_LIST)
2466 cond = TREE_VALUE (cond);
2468 r = c_add_case_label (switch_stack->cases, cond, TREE_TYPE (cond),
2469 low_value, high_value);
2471 check_switch_goto (switch_stack->level);
2473 /* After labels, make any new cleanups in the function go into their
2474 own new (temporary) binding contour. */
2475 for (p = current_binding_level;
2476 p->kind != sk_function_parms;
2478 p->more_cleanups_ok = 0;
2483 /* Hash a TYPENAME_TYPE. K is really of type `tree'. */
2486 typename_hash (const void* k)
2491 hash = (htab_hash_pointer (TYPE_CONTEXT (t))
2492 ^ htab_hash_pointer (DECL_NAME (TYPE_NAME (t))));
2497 /* Compare two TYPENAME_TYPEs. K1 and K2 are really of type `tree'. */
2500 typename_compare (const void * k1, const void * k2)
2509 d1 = TYPE_NAME (t1);
2510 d2 = TYPE_NAME (t2);
2512 return (DECL_NAME (d1) == DECL_NAME (d2)
2513 && TYPE_CONTEXT (t1) == TYPE_CONTEXT (t2)
2514 && ((TREE_TYPE (t1) != NULL_TREE)
2515 == (TREE_TYPE (t2) != NULL_TREE))
2516 && same_type_p (TREE_TYPE (t1), TREE_TYPE (t2))
2517 && TYPENAME_TYPE_FULLNAME (t1) == TYPENAME_TYPE_FULLNAME (t2));
2520 /* Build a TYPENAME_TYPE. If the type is `typename T::t', CONTEXT is
2521 the type of `T', NAME is the IDENTIFIER_NODE for `t'. If BASE_TYPE
2522 is non-NULL, this type is being created by the implicit typename
2523 extension, and BASE_TYPE is a type named `t' in some base class of
2524 `T' which depends on template parameters.
2526 Returns the new TYPENAME_TYPE. */
2528 static GTY ((param_is (union tree_node))) htab_t typename_htab;
2531 build_typename_type (tree context, tree name, tree fullname)
2537 if (typename_htab == NULL)
2539 typename_htab = htab_create_ggc (61, &typename_hash,
2540 &typename_compare, NULL);
2543 /* Build the TYPENAME_TYPE. */
2544 t = make_aggr_type (TYPENAME_TYPE);
2545 TYPE_CONTEXT (t) = FROB_CONTEXT (context);
2546 TYPENAME_TYPE_FULLNAME (t) = fullname;
2548 /* Build the corresponding TYPE_DECL. */
2549 d = build_decl (TYPE_DECL, name, t);
2550 TYPE_NAME (TREE_TYPE (d)) = d;
2551 TYPE_STUB_DECL (TREE_TYPE (d)) = d;
2552 DECL_CONTEXT (d) = FROB_CONTEXT (context);
2553 DECL_ARTIFICIAL (d) = 1;
2555 /* See if we already have this type. */
2556 e = htab_find_slot (typename_htab, t, INSERT);
2565 /* Resolve `typename CONTEXT::NAME'. Returns an appropriate type,
2566 unless an error occurs, in which case error_mark_node is returned.
2567 If we locate a non-artificial TYPE_DECL and TF_KEEP_TYPE_DECL is
2568 set, we return that, rather than the _TYPE it corresponds to, in
2569 other cases we look through the type decl. If TF_ERROR is set,
2570 complain about errors, otherwise be quiet. */
2573 make_typename_type (tree context, tree name, tsubst_flags_t complain)
2577 if (name == error_mark_node
2578 || context == NULL_TREE
2579 || context == error_mark_node)
2580 return error_mark_node;
2584 if (!(TYPE_LANG_SPECIFIC (name)
2585 && (CLASSTYPE_IS_TEMPLATE (name)
2586 || CLASSTYPE_USE_TEMPLATE (name))))
2587 name = TYPE_IDENTIFIER (name);
2589 /* Create a TEMPLATE_ID_EXPR for the type. */
2590 name = build_nt (TEMPLATE_ID_EXPR,
2591 CLASSTYPE_TI_TEMPLATE (name),
2592 CLASSTYPE_TI_ARGS (name));
2594 else if (TREE_CODE (name) == TYPE_DECL)
2595 name = DECL_NAME (name);
2599 if (TREE_CODE (name) == TEMPLATE_ID_EXPR)
2601 name = TREE_OPERAND (name, 0);
2602 if (TREE_CODE (name) == TEMPLATE_DECL)
2603 name = TREE_OPERAND (fullname, 0) = DECL_NAME (name);
2605 if (TREE_CODE (name) == TEMPLATE_DECL)
2607 error ("`%D' used without template parameters", name);
2608 return error_mark_node;
2610 my_friendly_assert (TREE_CODE (name) == IDENTIFIER_NODE, 20030802);
2612 if (TREE_CODE (context) == NAMESPACE_DECL)
2614 /* We can get here from typename_sub0 in the explicit_template_type
2615 expansion. Just fail. */
2616 if (complain & tf_error)
2617 error ("no class template named `%#T' in `%#T'",
2619 return error_mark_node;
2622 if (!dependent_type_p (context)
2623 || currently_open_class (context))
2625 if (TREE_CODE (fullname) == TEMPLATE_ID_EXPR)
2627 tree tmpl = NULL_TREE;
2628 if (IS_AGGR_TYPE (context))
2629 tmpl = lookup_field (context, name, 0, false);
2630 if (!tmpl || !DECL_CLASS_TEMPLATE_P (tmpl))
2632 if (complain & tf_error)
2633 error ("no class template named `%#T' in `%#T'",
2635 return error_mark_node;
2638 if (complain & tf_error)
2639 perform_or_defer_access_check (TYPE_BINFO (context), tmpl);
2641 return lookup_template_class (tmpl,
2642 TREE_OPERAND (fullname, 1),
2644 /*entering_scope=*/0,
2645 tf_error | tf_warning | tf_user);
2651 if (!IS_AGGR_TYPE (context))
2653 if (complain & tf_error)
2654 error ("no type named `%#T' in `%#T'", name, context);
2655 return error_mark_node;
2658 t = lookup_field (context, name, 0, true);
2661 if (TREE_CODE (t) != TYPE_DECL)
2663 if (complain & tf_error)
2664 error ("no type named `%#T' in `%#T'", name, context);
2665 return error_mark_node;
2668 if (complain & tf_error)
2669 perform_or_defer_access_check (TYPE_BINFO (context), t);
2671 if (DECL_ARTIFICIAL (t) || !(complain & tf_keep_type_decl))
2679 /* If the CONTEXT is not a template type, then either the field is
2680 there now or its never going to be. */
2681 if (!dependent_type_p (context))
2683 if (complain & tf_error)
2684 error ("no type named `%#T' in `%#T'", name, context);
2685 return error_mark_node;
2688 return build_typename_type (context, name, fullname);
2691 /* Resolve `CONTEXT::template NAME'. Returns an appropriate type,
2692 unless an error occurs, in which case error_mark_node is returned.
2693 If we locate a TYPE_DECL, we return that, rather than the _TYPE it
2694 corresponds to. If COMPLAIN zero, don't complain about any errors
2698 make_unbound_class_template (tree context, tree name, tsubst_flags_t complain)
2704 name = TYPE_IDENTIFIER (name);
2705 else if (DECL_P (name))
2706 name = DECL_NAME (name);
2707 if (TREE_CODE (name) != IDENTIFIER_NODE)
2710 if (!dependent_type_p (context)
2711 || currently_open_class (context))
2713 tree tmpl = NULL_TREE;
2715 if (IS_AGGR_TYPE (context))
2716 tmpl = lookup_field (context, name, 0, false);
2718 if (!tmpl || !DECL_CLASS_TEMPLATE_P (tmpl))
2720 if (complain & tf_error)
2721 error ("no class template named `%#T' in `%#T'", name, context);
2722 return error_mark_node;
2725 if (complain & tf_error)
2726 perform_or_defer_access_check (TYPE_BINFO (context), tmpl);
2731 /* Build the UNBOUND_CLASS_TEMPLATE. */
2732 t = make_aggr_type (UNBOUND_CLASS_TEMPLATE);
2733 TYPE_CONTEXT (t) = FROB_CONTEXT (context);
2734 TREE_TYPE (t) = NULL_TREE;
2736 /* Build the corresponding TEMPLATE_DECL. */
2737 d = build_decl (TEMPLATE_DECL, name, t);
2738 TYPE_NAME (TREE_TYPE (d)) = d;
2739 TYPE_STUB_DECL (TREE_TYPE (d)) = d;
2740 DECL_CONTEXT (d) = FROB_CONTEXT (context);
2741 DECL_ARTIFICIAL (d) = 1;
2748 /* Push the declarations of builtin types into the namespace.
2749 RID_INDEX is the index of the builtin type in the array
2750 RID_POINTERS. NAME is the name used when looking up the builtin
2751 type. TYPE is the _TYPE node for the builtin type. */
2754 record_builtin_type (enum rid rid_index,
2758 tree rname = NULL_TREE, tname = NULL_TREE;
2759 tree tdecl = NULL_TREE;
2761 if ((int) rid_index < (int) RID_MAX)
2762 rname = ridpointers[(int) rid_index];
2764 tname = get_identifier (name);
2766 /* The calls to SET_IDENTIFIER_GLOBAL_VALUE below should be
2767 eliminated. Built-in types should not be looked up name; their
2768 names are keywords that the parser can recognize. However, there
2769 is code in c-common.c that uses identifier_global_value to look
2770 up built-in types by name. */
2773 tdecl = build_decl (TYPE_DECL, tname, type);
2774 DECL_ARTIFICIAL (tdecl) = 1;
2775 SET_IDENTIFIER_GLOBAL_VALUE (tname, tdecl);
2781 tdecl = build_decl (TYPE_DECL, rname, type);
2782 DECL_ARTIFICIAL (tdecl) = 1;
2784 SET_IDENTIFIER_GLOBAL_VALUE (rname, tdecl);
2787 if (!TYPE_NAME (type))
2788 TYPE_NAME (type) = tdecl;
2791 debug_hooks->type_decl (tdecl, 0);
2794 /* Record one of the standard Java types.
2795 * Declare it as having the given NAME.
2796 * If SIZE > 0, it is the size of one of the integral types;
2797 * otherwise it is the negative of the size of one of the other types. */
2800 record_builtin_java_type (const char* name, int size)
2804 type = make_signed_type (size);
2805 else if (size > -32)
2806 { /* "__java_char" or ""__java_boolean". */
2807 type = make_unsigned_type (-size);
2808 /*if (size == -1) TREE_SET_CODE (type, BOOLEAN_TYPE);*/
2811 { /* "__java_float" or ""__java_double". */
2812 type = make_node (REAL_TYPE);
2813 TYPE_PRECISION (type) = - size;
2816 record_builtin_type (RID_MAX, name, type);
2817 decl = TYPE_NAME (type);
2819 /* Suppress generate debug symbol entries for these types,
2820 since for normal C++ they are just clutter.
2821 However, push_lang_context undoes this if extern "Java" is seen. */
2822 DECL_IGNORED_P (decl) = 1;
2824 TYPE_FOR_JAVA (type) = 1;
2828 /* Push a type into the namespace so that the back-ends ignore it. */
2831 record_unknown_type (tree type, const char* name)
2833 tree decl = pushdecl (build_decl (TYPE_DECL, get_identifier (name), type));
2834 /* Make sure the "unknown type" typedecl gets ignored for debug info. */
2835 DECL_IGNORED_P (decl) = 1;
2836 TYPE_DECL_SUPPRESS_DEBUG (decl) = 1;
2837 TYPE_SIZE (type) = TYPE_SIZE (void_type_node);
2838 TYPE_ALIGN (type) = 1;
2839 TYPE_USER_ALIGN (type) = 0;
2840 TYPE_MODE (type) = TYPE_MODE (void_type_node);
2843 /* An string for which we should create an IDENTIFIER_NODE at
2846 typedef struct predefined_identifier
2848 /* The name of the identifier. */
2849 const char *const name;
2850 /* The place where the IDENTIFIER_NODE should be stored. */
2852 /* Nonzero if this is the name of a constructor or destructor. */
2853 const int ctor_or_dtor_p;
2854 } predefined_identifier;
2856 /* Create all the predefined identifiers. */
2859 initialize_predefined_identifiers (void)
2861 const predefined_identifier *pid;
2863 /* A table of identifiers to create at startup. */
2864 static const predefined_identifier predefined_identifiers[] = {
2865 { "C++", &lang_name_cplusplus, 0 },
2866 { "C", &lang_name_c, 0 },
2867 { "Java", &lang_name_java, 0 },
2868 { CTOR_NAME, &ctor_identifier, 1 },
2869 { "__base_ctor", &base_ctor_identifier, 1 },
2870 { "__comp_ctor", &complete_ctor_identifier, 1 },
2871 { DTOR_NAME, &dtor_identifier, 1 },
2872 { "__comp_dtor", &complete_dtor_identifier, 1 },
2873 { "__base_dtor", &base_dtor_identifier, 1 },
2874 { "__deleting_dtor", &deleting_dtor_identifier, 1 },
2875 { IN_CHARGE_NAME, &in_charge_identifier, 0 },
2876 { "nelts", &nelts_identifier, 0 },
2877 { THIS_NAME, &this_identifier, 0 },
2878 { VTABLE_DELTA_NAME, &delta_identifier, 0 },
2879 { VTABLE_PFN_NAME, &pfn_identifier, 0 },
2880 { "_vptr", &vptr_identifier, 0 },
2881 { "__vtt_parm", &vtt_parm_identifier, 0 },
2882 { "::", &global_scope_name, 0 },
2883 { "std", &std_identifier, 0 },
2887 for (pid = predefined_identifiers; pid->name; ++pid)
2889 *pid->node = get_identifier (pid->name);
2890 if (pid->ctor_or_dtor_p)
2891 IDENTIFIER_CTOR_OR_DTOR_P (*pid->node) = 1;
2895 /* Create the predefined scalar types of C,
2896 and some nodes representing standard constants (0, 1, (void *)0).
2897 Initialize the global binding level.
2898 Make definitions for built-in primitive functions. */
2901 cxx_init_decl_processing (void)
2904 tree void_ftype_ptr;
2906 build_common_tree_nodes (flag_signed_char);
2908 /* Create all the identifiers we need. */
2909 initialize_predefined_identifiers ();
2911 /* Create the global variables. */
2912 push_to_top_level ();
2914 current_function_decl = NULL_TREE;
2915 current_binding_level = NULL;
2916 /* Enter the global namespace. */
2917 my_friendly_assert (global_namespace == NULL_TREE, 375);
2918 global_namespace = build_lang_decl (NAMESPACE_DECL, global_scope_name,
2920 begin_scope (sk_namespace, global_namespace);
2922 current_lang_name = NULL_TREE;
2924 /* Adjust various flags based on command-line settings. */
2925 if (!flag_permissive)
2926 flag_pedantic_errors = 1;
2927 if (!flag_no_inline)
2929 flag_inline_trees = 1;
2932 if (flag_inline_functions)
2934 flag_inline_trees = 2;
2935 flag_inline_functions = 0;
2938 /* Force minimum function alignment if using the least significant
2939 bit of function pointers to store the virtual bit. */
2940 if (TARGET_PTRMEMFUNC_VBIT_LOCATION == ptrmemfunc_vbit_in_pfn
2941 && force_align_functions_log < 1)
2942 force_align_functions_log = 1;
2945 current_lang_name = lang_name_c;
2947 error_mark_list = build_tree_list (error_mark_node, error_mark_node);
2948 TREE_TYPE (error_mark_list) = error_mark_node;
2950 /* Create the `std' namespace. */
2951 push_namespace (std_identifier);
2952 std_node = current_namespace;
2955 c_common_nodes_and_builtins ();
2957 java_byte_type_node = record_builtin_java_type ("__java_byte", 8);
2958 java_short_type_node = record_builtin_java_type ("__java_short", 16);
2959 java_int_type_node = record_builtin_java_type ("__java_int", 32);
2960 java_long_type_node = record_builtin_java_type ("__java_long", 64);
2961 java_float_type_node = record_builtin_java_type ("__java_float", -32);
2962 java_double_type_node = record_builtin_java_type ("__java_double", -64);
2963 java_char_type_node = record_builtin_java_type ("__java_char", -16);
2964 java_boolean_type_node = record_builtin_java_type ("__java_boolean", -1);
2966 integer_two_node = build_int_cst (NULL_TREE, 2, 0);
2967 integer_three_node = build_int_cst (NULL_TREE, 3, 0);
2969 record_builtin_type (RID_BOOL, "bool", boolean_type_node);
2970 truthvalue_type_node = boolean_type_node;
2971 truthvalue_false_node = boolean_false_node;
2972 truthvalue_true_node = boolean_true_node;
2974 empty_except_spec = build_tree_list (NULL_TREE, NULL_TREE);
2977 record_builtin_type (RID_MAX, NULL, string_type_node);
2980 delta_type_node = ptrdiff_type_node;
2981 vtable_index_type = ptrdiff_type_node;
2983 vtt_parm_type = build_pointer_type (const_ptr_type_node);
2984 void_ftype = build_function_type (void_type_node, void_list_node);
2985 void_ftype_ptr = build_function_type (void_type_node,
2986 tree_cons (NULL_TREE,
2990 = build_exception_variant (void_ftype_ptr, empty_except_spec);
2992 /* C++ extensions */
2994 unknown_type_node = make_node (UNKNOWN_TYPE);
2995 record_unknown_type (unknown_type_node, "unknown type");
2997 /* Indirecting an UNKNOWN_TYPE node yields an UNKNOWN_TYPE node. */
2998 TREE_TYPE (unknown_type_node) = unknown_type_node;
3000 /* Looking up TYPE_POINTER_TO and TYPE_REFERENCE_TO yield the same
3002 TYPE_POINTER_TO (unknown_type_node) = unknown_type_node;
3003 TYPE_REFERENCE_TO (unknown_type_node) = unknown_type_node;
3006 /* Make sure we get a unique function type, so we can give
3007 its pointer type a name. (This wins for gdb.) */
3008 tree vfunc_type = make_node (FUNCTION_TYPE);
3009 TREE_TYPE (vfunc_type) = integer_type_node;
3010 TYPE_ARG_TYPES (vfunc_type) = NULL_TREE;
3011 layout_type (vfunc_type);
3013 vtable_entry_type = build_pointer_type (vfunc_type);
3015 record_builtin_type (RID_MAX, VTBL_PTR_TYPE, vtable_entry_type);
3018 = build_cplus_array_type (vtable_entry_type, NULL_TREE);
3019 layout_type (vtbl_type_node);
3020 vtbl_type_node = build_qualified_type (vtbl_type_node, TYPE_QUAL_CONST);
3021 record_builtin_type (RID_MAX, NULL, vtbl_type_node);
3022 vtbl_ptr_type_node = build_pointer_type (vtable_entry_type);
3023 layout_type (vtbl_ptr_type_node);
3024 record_builtin_type (RID_MAX, NULL, vtbl_ptr_type_node);
3026 push_namespace (get_identifier ("__cxxabiv1"));
3027 abi_node = current_namespace;
3030 global_type_node = make_node (LANG_TYPE);
3031 record_unknown_type (global_type_node, "global type");
3034 current_lang_name = lang_name_cplusplus;
3038 tree bad_alloc_type_node;
3039 tree bad_alloc_decl;
3040 tree newtype, deltype;
3041 tree ptr_ftype_sizetype;
3043 push_namespace (std_identifier);
3044 bad_alloc_id = get_identifier ("bad_alloc");
3045 bad_alloc_type_node = make_aggr_type (RECORD_TYPE);
3046 TYPE_CONTEXT (bad_alloc_type_node) = current_namespace;
3048 = create_implicit_typedef (bad_alloc_id, bad_alloc_type_node);
3049 DECL_CONTEXT (bad_alloc_decl) = current_namespace;
3050 TYPE_STUB_DECL (bad_alloc_type_node) = bad_alloc_decl;
3054 = build_function_type (ptr_type_node,
3055 tree_cons (NULL_TREE,
3058 newtype = build_exception_variant
3059 (ptr_ftype_sizetype, add_exception_specifier
3060 (NULL_TREE, bad_alloc_type_node, -1));
3061 deltype = build_exception_variant (void_ftype_ptr, empty_except_spec);
3062 push_cp_library_fn (NEW_EXPR, newtype);
3063 push_cp_library_fn (VEC_NEW_EXPR, newtype);
3064 global_delete_fndecl = push_cp_library_fn (DELETE_EXPR, deltype);
3065 push_cp_library_fn (VEC_DELETE_EXPR, deltype);
3069 = build_library_fn_ptr ("__cxa_pure_virtual", void_ftype);
3071 /* Perform other language dependent initializations. */
3072 init_class_processing ();
3073 init_rtti_processing ();
3075 if (flag_exceptions)
3076 init_exception_processing ();
3078 if (! supports_one_only ())
3081 make_fname_decl = cp_make_fname_decl;
3082 start_fname_decls ();
3084 /* Show we use EH for cleanups. */
3085 if (flag_exceptions)
3086 using_eh_for_cleanups ();
3089 /* Generate an initializer for a function naming variable from
3090 NAME. NAME may be NULL, to indicate a dependent name. TYPE_P is
3091 filled in with the type of the init. */
3094 cp_fname_init (const char* name, tree *type_p)
3096 tree domain = NULL_TREE;
3098 tree init = NULL_TREE;
3103 length = strlen (name);
3104 domain = build_index_type (size_int (length));
3105 init = build_string (length + 1, name);
3108 type = build_qualified_type (char_type_node, TYPE_QUAL_CONST);
3109 type = build_cplus_array_type (type, domain);
3114 TREE_TYPE (init) = type;
3116 init = error_mark_node;
3121 /* Create the VAR_DECL for __FUNCTION__ etc. ID is the name to give the
3122 decl, NAME is the initialization string and TYPE_DEP indicates whether
3123 NAME depended on the type of the function. We make use of that to detect
3124 __PRETTY_FUNCTION__ inside a template fn. This is being done
3125 lazily at the point of first use, so we mustn't push the decl now. */
3128 cp_make_fname_decl (tree id, int type_dep)
3130 const char *const name = (type_dep && processing_template_decl
3131 ? NULL : fname_as_string (type_dep));
3133 tree init = cp_fname_init (name, &type);
3134 tree decl = build_decl (VAR_DECL, id, type);
3137 free ((char *) name);
3139 /* As we're using pushdecl_with_scope, we must set the context. */
3140 DECL_CONTEXT (decl) = current_function_decl;
3141 DECL_PRETTY_FUNCTION_P (decl) = type_dep;
3143 TREE_STATIC (decl) = 1;
3144 TREE_READONLY (decl) = 1;
3145 DECL_ARTIFICIAL (decl) = 1;
3146 DECL_INITIAL (decl) = init;
3148 TREE_USED (decl) = 1;
3150 if (current_function_decl)
3152 struct cp_binding_level *b = current_binding_level;
3153 while (b->level_chain->kind != sk_function_parms)
3155 pushdecl_with_scope (decl, b);
3156 cp_finish_decl (decl, init, NULL_TREE, LOOKUP_ONLYCONVERTING);
3159 pushdecl_top_level_and_finish (decl, init);
3164 /* Make a definition for a builtin function named NAME in the current
3165 namespace, whose data type is TYPE and whose context is CONTEXT.
3166 TYPE should be a function type with argument types.
3168 CLASS and CODE tell later passes how to compile calls to this function.
3169 See tree.h for possible values.
3171 If LIBNAME is nonzero, use that for DECL_ASSEMBLER_NAME,
3172 the name to be called if we can't opencode the function.
3173 If ATTRS is nonzero, use that for the function's attribute
3177 builtin_function_1 (const char* name,
3180 enum built_in_function code,
3181 enum built_in_class class,
3182 const char* libname,
3185 tree decl = build_library_fn_1 (get_identifier (name), ERROR_MARK, type);
3186 DECL_BUILT_IN_CLASS (decl) = class;
3187 DECL_FUNCTION_CODE (decl) = code;
3188 DECL_CONTEXT (decl) = context;
3192 /* Since `pushdecl' relies on DECL_ASSEMBLER_NAME instead of DECL_NAME,
3193 we cannot change DECL_ASSEMBLER_NAME until we have installed this
3194 function in the namespace. */
3196 SET_DECL_ASSEMBLER_NAME (decl, get_identifier (libname));
3198 /* Warn if a function in the namespace for users
3199 is used without an occasion to consider it declared. */
3200 if (name[0] != '_' || name[1] != '_')
3201 DECL_ANTICIPATED (decl) = 1;
3203 /* Possibly apply some default attributes to this built-in function. */
3205 decl_attributes (&decl, attrs, ATTR_FLAG_BUILT_IN);
3207 decl_attributes (&decl, NULL_TREE, 0);
3212 /* Entry point for the benefit of c_common_nodes_and_builtins.
3214 Make a definition for a builtin function named NAME and whose data type
3215 is TYPE. TYPE should be a function type with argument types. This
3216 function places the anticipated declaration in the global namespace
3217 and additionally in the std namespace if appropriate.
3219 CLASS and CODE tell later passes how to compile calls to this function.
3220 See tree.h for possible values.
3222 If LIBNAME is nonzero, use that for DECL_ASSEMBLER_NAME,
3223 the name to be called if we can't opencode the function.
3225 If ATTRS is nonzero, use that for the function's attribute
3229 builtin_function (const char* name,
3232 enum built_in_class cl,
3233 const char* libname,
3236 /* All builtins that don't begin with an '_' should additionally
3237 go in the 'std' namespace. */
3240 push_namespace (std_identifier);
3241 builtin_function_1 (name, type, std_node, code, cl, libname, attrs);
3245 return builtin_function_1 (name, type, NULL_TREE, code,
3246 cl, libname, attrs);
3249 /* Generate a FUNCTION_DECL with the typical flags for a runtime library
3250 function. Not called directly. */
3253 build_library_fn_1 (tree name, enum tree_code operator_code, tree type)
3255 tree fn = build_lang_decl (FUNCTION_DECL, name, type);
3256 DECL_EXTERNAL (fn) = 1;
3257 TREE_PUBLIC (fn) = 1;
3258 DECL_ARTIFICIAL (fn) = 1;
3259 TREE_NOTHROW (fn) = 1;
3260 SET_OVERLOADED_OPERATOR_CODE (fn, operator_code);
3261 SET_DECL_LANGUAGE (fn, lang_c);
3262 /* Runtime library routines are, by definition, available in an
3263 external shared object. */
3264 DECL_VISIBILITY (fn) = VISIBILITY_DEFAULT;
3265 DECL_VISIBILITY_SPECIFIED (fn) = 1;
3269 /* Returns the _DECL for a library function with C linkage.
3270 We assume that such functions never throw; if this is incorrect,
3271 callers should unset TREE_NOTHROW. */
3274 build_library_fn (tree name, tree type)
3276 return build_library_fn_1 (name, ERROR_MARK, type);
3279 /* Returns the _DECL for a library function with C++ linkage. */
3282 build_cp_library_fn (tree name, enum tree_code operator_code, tree type)
3284 tree fn = build_library_fn_1 (name, operator_code, type);
3285 TREE_NOTHROW (fn) = TYPE_NOTHROW_P (type);
3286 DECL_CONTEXT (fn) = FROB_CONTEXT (current_namespace);
3287 SET_DECL_LANGUAGE (fn, lang_cplusplus);
3291 /* Like build_library_fn, but takes a C string instead of an
3295 build_library_fn_ptr (const char* name, tree type)
3297 return build_library_fn (get_identifier (name), type);
3300 /* Like build_cp_library_fn, but takes a C string instead of an
3304 build_cp_library_fn_ptr (const char* name, tree type)
3306 return build_cp_library_fn (get_identifier (name), ERROR_MARK, type);
3309 /* Like build_library_fn, but also pushes the function so that we will
3310 be able to find it via IDENTIFIER_GLOBAL_VALUE. */
3313 push_library_fn (tree name, tree type)
3315 tree fn = build_library_fn (name, type);
3316 pushdecl_top_level (fn);
3320 /* Like build_cp_library_fn, but also pushes the function so that it
3321 will be found by normal lookup. */
3324 push_cp_library_fn (enum tree_code operator_code, tree type)
3326 tree fn = build_cp_library_fn (ansi_opname (operator_code),
3333 /* Like push_library_fn, but takes a TREE_LIST of parm types rather than
3337 push_void_library_fn (tree name, tree parmtypes)
3339 tree type = build_function_type (void_type_node, parmtypes);
3340 return push_library_fn (name, type);
3343 /* Like push_library_fn, but also note that this function throws
3344 and does not return. Used for __throw_foo and the like. */
3347 push_throw_library_fn (tree name, tree type)
3349 tree fn = push_library_fn (name, type);
3350 TREE_THIS_VOLATILE (fn) = 1;
3351 TREE_NOTHROW (fn) = 0;
3355 /* When we call finish_struct for an anonymous union, we create
3356 default copy constructors and such. But, an anonymous union
3357 shouldn't have such things; this function undoes the damage to the
3358 anonymous union type T.
3360 (The reason that we create the synthesized methods is that we don't
3361 distinguish `union { int i; }' from `typedef union { int i; } U'.
3362 The first is an anonymous union; the second is just an ordinary
3366 fixup_anonymous_aggr (tree t)
3370 /* Wipe out memory of synthesized methods. */
3371 TYPE_HAS_CONSTRUCTOR (t) = 0;
3372 TYPE_HAS_DEFAULT_CONSTRUCTOR (t) = 0;
3373 TYPE_HAS_INIT_REF (t) = 0;
3374 TYPE_HAS_CONST_INIT_REF (t) = 0;
3375 TYPE_HAS_ASSIGN_REF (t) = 0;
3376 TYPE_HAS_CONST_ASSIGN_REF (t) = 0;
3378 /* Splice the implicitly generated functions out of the TYPE_METHODS
3380 q = &TYPE_METHODS (t);
3383 if (DECL_ARTIFICIAL (*q))
3384 *q = TREE_CHAIN (*q);
3386 q = &TREE_CHAIN (*q);
3389 /* ISO C++ 9.5.3. Anonymous unions may not have function members. */
3390 if (TYPE_METHODS (t))
3391 error ("%Jan anonymous union cannot have function members",
3392 TYPE_MAIN_DECL (t));
3394 /* Anonymous aggregates cannot have fields with ctors, dtors or complex
3395 assignment operators (because they cannot have these methods themselves).
3396 For anonymous unions this is already checked because they are not allowed
3397 in any union, otherwise we have to check it. */
3398 if (TREE_CODE (t) != UNION_TYPE)
3402 for (field = TYPE_FIELDS (t); field; field = TREE_CHAIN (field))
3403 if (TREE_CODE (field) == FIELD_DECL)
3405 type = TREE_TYPE (field);
3406 if (CLASS_TYPE_P (type))
3408 if (TYPE_NEEDS_CONSTRUCTING (type))
3409 cp_error_at ("member %#D' with constructor not allowed in anonymous aggregate",
3411 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type))
3412 cp_error_at ("member %#D' with destructor not allowed in anonymous aggregate",
3414 if (TYPE_HAS_COMPLEX_ASSIGN_REF (type))
3415 cp_error_at ("member %#D' with copy assignment operator not allowed in anonymous aggregate",
3422 /* Make sure that a declaration with no declarator is well-formed, i.e.
3423 just declares a tagged type or anonymous union.
3425 Returns the type declared; or NULL_TREE if none. */
3428 check_tag_decl (cp_decl_specifier_seq *declspecs)
3430 int saw_friend = declspecs->specs[(int)ds_friend] != 0;
3431 int saw_typedef = declspecs->specs[(int)ds_typedef] != 0;
3432 /* If a class, struct, or enum type is declared by the DECLSPECS
3433 (i.e, if a class-specifier, enum-specifier, or non-typename
3434 elaborated-type-specifier appears in the DECLSPECS),
3435 DECLARED_TYPE is set to the corresponding type. */
3436 tree declared_type = NULL_TREE;
3437 bool error_p = false;
3439 if (declspecs->multiple_types_p)
3440 error ("multiple types in one declaration");
3441 else if (declspecs->redefined_builtin_type)
3443 if (!in_system_header)
3444 pedwarn ("redeclaration of C++ built-in type %qT",
3445 declspecs->redefined_builtin_type);
3449 if (TYPE_P (declspecs->type)
3450 && ((TREE_CODE (declspecs->type) != TYPENAME_TYPE
3451 && IS_AGGR_TYPE (declspecs->type))
3452 || TREE_CODE (declspecs->type) == ENUMERAL_TYPE))
3453 declared_type = declspecs->type;
3454 else if (declspecs->type == error_mark_node)
3456 if (declared_type == NULL_TREE && ! saw_friend && !error_p)
3457 pedwarn ("declaration does not declare anything");
3458 /* Check for an anonymous union. */
3459 else if (declared_type && IS_AGGR_TYPE_CODE (TREE_CODE (declared_type))
3460 && TYPE_ANONYMOUS_P (declared_type))
3462 /* 7/3 In a simple-declaration, the optional init-declarator-list
3463 can be omitted only when declaring a class (clause 9) or
3464 enumeration (7.2), that is, when the decl-specifier-seq contains
3465 either a class-specifier, an elaborated-type-specifier with
3466 a class-key (9.1), or an enum-specifier. In these cases and
3467 whenever a class-specifier or enum-specifier is present in the
3468 decl-specifier-seq, the identifiers in these specifiers are among
3469 the names being declared by the declaration (as class-name,
3470 enum-names, or enumerators, depending on the syntax). In such
3471 cases, and except for the declaration of an unnamed bit-field (9.6),
3472 the decl-specifier-seq shall introduce one or more names into the
3473 program, or shall redeclare a name introduced by a previous
3474 declaration. [Example:
3475 enum { }; // ill-formed
3476 typedef class { }; // ill-formed
3480 error ("missing type-name in typedef-declaration");
3483 /* Anonymous unions are objects, so they can have specifiers. */;
3484 SET_ANON_AGGR_TYPE_P (declared_type);
3486 if (TREE_CODE (declared_type) != UNION_TYPE && pedantic
3487 && !in_system_header)
3488 pedwarn ("ISO C++ prohibits anonymous structs");
3493 if (declspecs->specs[(int)ds_inline]
3494 || declspecs->specs[(int)ds_virtual])
3495 error ("`%s' can only be specified for functions",
3496 declspecs->specs[(int)ds_inline]
3497 ? "inline" : "virtual");
3499 && (!current_class_type
3500 || current_scope () != current_class_type))
3501 error ("`friend' can only be specified inside a class");
3502 else if (declspecs->specs[(int)ds_explicit])
3503 error ("`explicit' can only be specified for constructors");
3504 else if (declspecs->storage_class)
3505 error ("a storage class can only be specified for objects "
3507 else if (declspecs->specs[(int)ds_const]
3508 || declspecs->specs[(int)ds_volatile]
3509 || declspecs->specs[(int)ds_restrict]
3510 || declspecs->specs[(int)ds_thread])
3511 error ("qualifiers can only be specified for objects "
3515 return declared_type;
3518 /* Called when a declaration is seen that contains no names to declare.
3519 If its type is a reference to a structure, union or enum inherited
3520 from a containing scope, shadow that tag name for the current scope
3521 with a forward reference.
3522 If its type defines a new named structure or union
3523 or defines an enum, it is valid but we need not do anything here.
3524 Otherwise, it is an error.
3526 C++: may have to grok the declspecs to learn about static,
3527 complain for anonymous unions.
3529 Returns the TYPE declared -- or NULL_TREE if none. */
3532 shadow_tag (cp_decl_specifier_seq *declspecs)
3534 tree t = check_tag_decl (declspecs);
3539 maybe_process_partial_specialization (t);
3541 /* This is where the variables in an anonymous union are
3542 declared. An anonymous union declaration looks like:
3544 because there is no declarator after the union, the parser
3545 sends that declaration here. */
3546 if (ANON_AGGR_TYPE_P (t))
3548 fixup_anonymous_aggr (t);
3550 if (TYPE_FIELDS (t))
3552 tree decl = grokdeclarator (/*declarator=*/NULL,
3553 declspecs, NORMAL, 0, NULL);
3554 finish_anon_union (decl);
3561 /* Decode a "typename", such as "int **", returning a ..._TYPE node. */
3564 groktypename (cp_decl_specifier_seq *type_specifiers,
3565 const cp_declarator *declarator)
3569 attrs = type_specifiers->attributes;
3570 type_specifiers->attributes = NULL_TREE;
3571 type = grokdeclarator (declarator, type_specifiers, TYPENAME, 0, &attrs);
3573 cplus_decl_attributes (&type, attrs, 0);
3577 /* Decode a declarator in an ordinary declaration or data definition.
3578 This is called as soon as the type information and variable name
3579 have been parsed, before parsing the initializer if any.
3580 Here we create the ..._DECL node, fill in its type,
3581 and put it on the list of decls for the current context.
3582 The ..._DECL node is returned as the value.
3584 Exception: for arrays where the length is not specified,
3585 the type is left null, to be filled in by `cp_finish_decl'.
3587 Function definitions do not come here; they go to start_function
3588 instead. However, external and forward declarations of functions
3589 do go through here. Structure field declarations are done by
3590 grokfield and not through here. */
3593 start_decl (const cp_declarator *declarator,
3594 cp_decl_specifier_seq *declspecs,
3597 tree prefix_attributes,
3604 /* This should only be done once on the top most decl. */
3605 if (have_extern_spec)
3607 declspecs->storage_class = sc_extern;
3608 have_extern_spec = false;
3611 /* An object declared as __attribute__((deprecated)) suppresses
3612 warnings of uses of other deprecated items. */
3613 if (lookup_attribute ("deprecated", attributes))
3614 deprecated_state = DEPRECATED_SUPPRESS;
3616 attributes = chainon (attributes, prefix_attributes);
3618 decl = grokdeclarator (declarator, declspecs, NORMAL, initialized,
3621 deprecated_state = DEPRECATED_NORMAL;
3623 if (decl == NULL_TREE || TREE_CODE (decl) == VOID_TYPE)
3626 type = TREE_TYPE (decl);
3628 if (type == error_mark_node)
3631 context = DECL_CONTEXT (decl);
3634 *pop_scope_p = push_scope (context);
3636 *pop_scope_p = false;
3638 /* We are only interested in class contexts, later. */
3639 if (context && TREE_CODE (context) == NAMESPACE_DECL)
3640 context = NULL_TREE;
3643 /* Is it valid for this decl to have an initializer at all?
3644 If not, set INITIALIZED to zero, which will indirectly
3645 tell `cp_finish_decl' to ignore the initializer once it is parsed. */
3646 switch (TREE_CODE (decl))
3649 error ("typedef `%D' is initialized (use __typeof__ instead)", decl);
3654 error ("function `%#D' is initialized like a variable", decl);
3664 if (! toplevel_bindings_p ()
3665 && DECL_EXTERNAL (decl))
3666 warning ("declaration of `%#D' has `extern' and is initialized",
3668 DECL_EXTERNAL (decl) = 0;
3669 if (toplevel_bindings_p ())
3670 TREE_STATIC (decl) = 1;
3672 /* Tell `pushdecl' this is an initialized decl
3673 even though we don't yet have the initializer expression.
3674 Also tell `cp_finish_decl' it may store the real initializer. */
3675 DECL_INITIAL (decl) = error_mark_node;
3678 /* Set attributes here so if duplicate decl, will have proper attributes. */
3679 cplus_decl_attributes (&decl, attributes, 0);
3681 /* If #pragma weak was used, mark the decl weak now. */
3682 if (global_scope_p (current_binding_level))
3683 maybe_apply_pragma_weak (decl);
3685 if (TREE_CODE (decl) == FUNCTION_DECL
3686 && DECL_DECLARED_INLINE_P (decl)
3687 && DECL_UNINLINABLE (decl)
3688 && lookup_attribute ("noinline", DECL_ATTRIBUTES (decl)))
3689 warning ("%Jinline function '%D' given attribute noinline", decl, decl);
3691 if (context && COMPLETE_TYPE_P (complete_type (context)))
3693 if (TREE_CODE (decl) == VAR_DECL)
3695 tree field = lookup_field (context, DECL_NAME (decl), 0, false);
3696 if (field == NULL_TREE || TREE_CODE (field) != VAR_DECL)
3697 error ("`%#D' is not a static member of `%#T'", decl, context);
3700 if (DECL_CONTEXT (field) != context)
3702 if (!same_type_p (DECL_CONTEXT (field), context))
3703 pedwarn ("ISO C++ does not permit `%T::%D' to be defined as `%T::%D'",
3704 DECL_CONTEXT (field), DECL_NAME (decl),
3705 context, DECL_NAME (decl));
3706 DECL_CONTEXT (decl) = DECL_CONTEXT (field);
3708 /* Static data member are tricky; an in-class initialization
3709 still doesn't provide a definition, so the in-class
3710 declaration will have DECL_EXTERNAL set, but will have an
3711 initialization. Thus, duplicate_decls won't warn
3712 about this situation, and so we check here. */
3713 if (DECL_INITIAL (decl) && DECL_INITIAL (field))
3714 error ("duplicate initialization of %D", decl);
3715 if (duplicate_decls (decl, field))
3721 tree field = check_classfn (context, decl,
3722 (processing_template_decl
3723 > template_class_depth (context))
3724 ? current_template_parms
3726 if (field && duplicate_decls (decl, field))
3730 /* cp_finish_decl sets DECL_EXTERNAL if DECL_IN_AGGR_P is set. */
3731 DECL_IN_AGGR_P (decl) = 0;
3732 if ((DECL_LANG_SPECIFIC (decl) && DECL_USE_TEMPLATE (decl))
3733 || CLASSTYPE_TEMPLATE_INSTANTIATION (context))
3735 SET_DECL_TEMPLATE_SPECIALIZATION (decl);
3736 /* [temp.expl.spec] An explicit specialization of a static data
3737 member of a template is a definition if the declaration
3738 includes an initializer; otherwise, it is a declaration.
3740 We check for processing_specialization so this only applies
3741 to the new specialization syntax. */
3742 if (DECL_INITIAL (decl) == NULL_TREE && processing_specialization)
3743 DECL_EXTERNAL (decl) = 1;
3746 if (DECL_EXTERNAL (decl) && ! DECL_TEMPLATE_SPECIALIZATION (decl))
3747 pedwarn ("declaration of `%#D' outside of class is not definition",
3751 /* Enter this declaration into the symbol table. */
3752 tem = maybe_push_decl (decl);
3754 if (processing_template_decl)
3755 tem = push_template_decl (tem);
3756 if (tem == error_mark_node)
3757 return error_mark_node;
3759 #if ! defined (ASM_OUTPUT_BSS) && ! defined (ASM_OUTPUT_ALIGNED_BSS)
3760 /* Tell the back-end to use or not use .common as appropriate. If we say
3761 -fconserve-space, we want this to save .data space, at the expense of
3762 wrong semantics. If we say -fno-conserve-space, we want this to
3763 produce errors about redefs; to do this we force variables into the
3765 DECL_COMMON (tem) = ((TREE_CODE (tem) != VAR_DECL
3766 || !DECL_THREAD_LOCAL (tem))
3767 && (flag_conserve_space || ! TREE_PUBLIC (tem)));
3770 if (! processing_template_decl)
3777 start_decl_1 (tree decl)
3779 tree type = TREE_TYPE (decl);
3780 int initialized = (DECL_INITIAL (decl) != NULL_TREE);
3782 if (type == error_mark_node)
3786 /* Is it valid for this decl to have an initializer at all?
3787 If not, set INITIALIZED to zero, which will indirectly
3788 tell `cp_finish_decl' to ignore the initializer once it is parsed. */
3790 /* Don't allow initializations for incomplete types except for
3791 arrays which might be completed by the initialization. */
3792 if (COMPLETE_TYPE_P (complete_type (type)))
3793 ; /* A complete type is ok. */
3794 else if (TREE_CODE (type) != ARRAY_TYPE)
3796 error ("variable `%#D' has initializer but incomplete type",
3799 type = TREE_TYPE (decl) = error_mark_node;
3801 else if (!COMPLETE_TYPE_P (complete_type (TREE_TYPE (type))))
3803 if (DECL_LANG_SPECIFIC (decl) && DECL_TEMPLATE_INFO (decl))
3804 error ("elements of array `%#D' have incomplete type", decl);
3805 /* else we already gave an error in start_decl. */
3811 && TREE_CODE (decl) != TYPE_DECL
3812 && TREE_CODE (decl) != TEMPLATE_DECL
3813 && type != error_mark_node
3814 && IS_AGGR_TYPE (type)
3815 && ! DECL_EXTERNAL (decl))
3817 if ((! processing_template_decl || ! uses_template_parms (type))
3818 && !COMPLETE_TYPE_P (complete_type (type)))
3820 error ("aggregate `%#D' has incomplete type and cannot be defined",
3822 /* Change the type so that assemble_variable will give
3823 DECL an rtl we can live with: (mem (const_int 0)). */
3824 type = TREE_TYPE (decl) = error_mark_node;
3828 /* If any base type in the hierarchy of TYPE needs a constructor,
3829 then we set initialized to 1. This way any nodes which are
3830 created for the purposes of initializing this aggregate
3831 will live as long as it does. This is necessary for global
3832 aggregates which do not have their initializers processed until
3833 the end of the file. */
3834 initialized = TYPE_NEEDS_CONSTRUCTING (type);
3839 DECL_INITIAL (decl) = NULL_TREE;
3841 /* Create a new scope to hold this declaration if necessary.
3842 Whether or not a new scope is necessary cannot be determined
3843 until after the type has been completed; if the type is a
3844 specialization of a class template it is not until after
3845 instantiation has occurred that TYPE_HAS_NONTRIVIAL_DESTRUCTOR
3846 will be set correctly. */
3847 maybe_push_cleanup_level (type);
3850 /* Handle initialization of references. DECL, TYPE, and INIT have the
3851 same meaning as in cp_finish_decl. *CLEANUP must be NULL on entry,
3852 but will be set to a new CLEANUP_STMT if a temporary is created
3853 that must be destroyed subsequently.
3855 Returns an initializer expression to use to initialize DECL, or
3856 NULL if the initialization can be performed statically.
3858 Quotes on semantics can be found in ARM 8.4.3. */
3861 grok_reference_init (tree decl, tree type, tree init, tree *cleanup)
3865 if (init == NULL_TREE)
3867 if ((DECL_LANG_SPECIFIC (decl) == 0
3868 || DECL_IN_AGGR_P (decl) == 0)
3869 && ! DECL_THIS_EXTERN (decl))
3870 error ("`%D' declared as reference but not initialized", decl);
3874 if (TREE_CODE (init) == CONSTRUCTOR)
3876 error ("ISO C++ forbids use of initializer list to initialize reference `%D'", decl);
3880 if (TREE_CODE (init) == TREE_LIST)
3881 init = build_x_compound_expr_from_list (init, "initializer");
3883 if (TREE_CODE (TREE_TYPE (init)) == REFERENCE_TYPE)
3884 init = convert_from_reference (init);
3886 if (TREE_CODE (TREE_TYPE (type)) != ARRAY_TYPE
3887 && TREE_CODE (TREE_TYPE (init)) == ARRAY_TYPE)
3888 /* Note: default conversion is only called in very special cases. */
3889 init = decay_conversion (init);
3891 /* Convert INIT to the reference type TYPE. This may involve the
3892 creation of a temporary, whose lifetime must be the same as that
3893 of the reference. If so, a DECL_EXPR for the temporary will be
3894 added just after the DECL_EXPR for DECL. That's why we don't set
3895 DECL_INITIAL for local references (instead assigning to them
3896 explicitly); we need to allow the temporary to be initialized
3898 tmp = initialize_reference (type, init, decl, cleanup);
3900 if (tmp == error_mark_node)
3902 else if (tmp == NULL_TREE)
3904 error ("cannot initialize `%T' from `%T'", type, TREE_TYPE (init));
3908 if (TREE_STATIC (decl) && !TREE_CONSTANT (tmp))
3911 DECL_INITIAL (decl) = tmp;
3916 /* When parsing `int a[] = {1, 2};' we don't know the size of the
3917 array until we finish parsing the initializer. If that's the
3918 situation we're in, update DECL accordingly. */
3921 maybe_deduce_size_from_array_init (tree decl, tree init)
3923 tree type = TREE_TYPE (decl);
3925 if (TREE_CODE (type) == ARRAY_TYPE
3926 && TYPE_DOMAIN (type) == NULL_TREE
3927 && TREE_CODE (decl) != TYPE_DECL)
3929 /* do_default is really a C-ism to deal with tentative definitions.
3930 But let's leave it here to ease the eventual merge. */
3931 int do_default = !DECL_EXTERNAL (decl);
3932 tree initializer = init ? init : DECL_INITIAL (decl);
3933 int failure = complete_array_type (type, initializer, do_default);
3936 error ("initializer fails to determine size of `%D'", decl);
3941 error ("array size missing in `%D'", decl);
3942 /* If a `static' var's size isn't known, make it extern as
3943 well as static, so it does not get allocated. If it's not
3944 `static', then don't mark it extern; finish_incomplete_decl
3945 will give it a default size and it will get allocated. */
3946 else if (!pedantic && TREE_STATIC (decl) && !TREE_PUBLIC (decl))
3947 DECL_EXTERNAL (decl) = 1;
3950 if (pedantic && TYPE_DOMAIN (type) != NULL_TREE
3951 && tree_int_cst_lt (TYPE_MAX_VALUE (TYPE_DOMAIN (type)),
3953 error ("zero-size array `%D'", decl);
3955 layout_decl (decl, 0);
3959 /* Set DECL_SIZE, DECL_ALIGN, etc. for DECL (a VAR_DECL), and issue
3960 any appropriate error messages regarding the layout. */
3963 layout_var_decl (tree decl)
3965 tree type = TREE_TYPE (decl);
3967 tree ttype = target_type (type);
3970 /* If we haven't already layed out this declaration, do so now.
3971 Note that we must not call complete type for an external object
3972 because it's type might involve templates that we are not
3973 supposed to instantiate yet. (And it's perfectly valid to say
3974 `extern X x' for some incomplete type `X'.) */
3975 if (!DECL_EXTERNAL (decl))
3976 complete_type (type);
3977 if (!DECL_SIZE (decl)
3978 && TREE_TYPE (decl) != error_mark_node
3979 && (COMPLETE_TYPE_P (type)
3980 || (TREE_CODE (type) == ARRAY_TYPE
3981 && !TYPE_DOMAIN (type)
3982 && COMPLETE_TYPE_P (TREE_TYPE (type)))))
3983 layout_decl (decl, 0);
3985 if (!DECL_EXTERNAL (decl) && DECL_SIZE (decl) == NULL_TREE)
3987 /* An automatic variable with an incomplete type: that is an error.
3988 Don't talk about array types here, since we took care of that
3989 message in grokdeclarator. */
3990 error ("storage size of `%D' isn't known", decl);
3991 TREE_TYPE (decl) = error_mark_node;
3994 /* Keep this code around in case we later want to control debug info
3995 based on whether a type is "used". (jason 1999-11-11) */
3997 else if (!DECL_EXTERNAL (decl) && IS_AGGR_TYPE (ttype))
3998 /* Let debugger know it should output info for this type. */
3999 note_debug_info_needed (ttype);
4001 if (TREE_STATIC (decl) && DECL_CLASS_SCOPE_P (decl))
4002 note_debug_info_needed (DECL_CONTEXT (decl));
4005 if ((DECL_EXTERNAL (decl) || TREE_STATIC (decl))
4006 && DECL_SIZE (decl) != NULL_TREE
4007 && ! TREE_CONSTANT (DECL_SIZE (decl)))
4009 if (TREE_CODE (DECL_SIZE (decl)) == INTEGER_CST)
4010 constant_expression_warning (DECL_SIZE (decl));
4012 error ("storage size of `%D' isn't constant", decl);
4015 if (TREE_STATIC (decl)
4016 && !DECL_ARTIFICIAL (decl)
4017 && current_function_decl
4018 && DECL_CONTEXT (decl) == current_function_decl)
4019 push_local_name (decl);
4022 /* If a local static variable is declared in an inline function, or if
4023 we have a weak definition, we must endeavor to create only one
4024 instance of the variable at link-time. */
4027 maybe_commonize_var (tree decl)
4029 /* Static data in a function with comdat linkage also has comdat
4031 if (TREE_STATIC (decl)
4032 /* Don't mess with __FUNCTION__. */
4033 && ! DECL_ARTIFICIAL (decl)
4034 && DECL_FUNCTION_SCOPE_P (decl)
4035 /* Unfortunately, import_export_decl has not always been called
4036 before the function is processed, so we cannot simply check
4038 && (DECL_COMDAT (DECL_CONTEXT (decl))
4039 || ((DECL_DECLARED_INLINE_P (DECL_CONTEXT (decl))
4040 || DECL_TEMPLATE_INSTANTIATION (DECL_CONTEXT (decl)))
4041 && TREE_PUBLIC (DECL_CONTEXT (decl)))))
4045 /* With weak symbols, we simply make the variable COMDAT;
4046 that will cause copies in multiple translations units to
4048 comdat_linkage (decl);
4052 if (DECL_INITIAL (decl) == NULL_TREE
4053 || DECL_INITIAL (decl) == error_mark_node)
4055 /* Without weak symbols, we can use COMMON to merge
4056 uninitialized variables. */
4057 TREE_PUBLIC (decl) = 1;
4058 DECL_COMMON (decl) = 1;
4062 /* While for initialized variables, we must use internal
4063 linkage -- which means that multiple copies will not
4065 TREE_PUBLIC (decl) = 0;
4066 DECL_COMMON (decl) = 0;
4067 cp_warning_at ("sorry: semantics of inline function static data `%#D' are wrong (you'll wind up with multiple copies)", decl);
4068 warning ("%J you can work around this by removing the initializer",
4073 else if (DECL_LANG_SPECIFIC (decl) && DECL_COMDAT (decl))
4074 /* Set it up again; we might have set DECL_INITIAL since the last
4076 comdat_linkage (decl);
4079 /* Issue an error message if DECL is an uninitialized const variable. */
4082 check_for_uninitialized_const_var (tree decl)
4084 tree type = TREE_TYPE (decl);
4086 /* ``Unless explicitly declared extern, a const object does not have
4087 external linkage and must be initialized. ($8.4; $12.1)'' ARM
4089 if (TREE_CODE (decl) == VAR_DECL
4090 && TREE_CODE (type) != REFERENCE_TYPE
4091 && CP_TYPE_CONST_P (type)
4092 && !TYPE_NEEDS_CONSTRUCTING (type)
4093 && !DECL_INITIAL (decl))
4094 error ("uninitialized const `%D'", decl);
4097 /* FIELD is a FIELD_DECL or NULL. In the former case, the value
4098 returned is the next FIELD_DECL (possibly FIELD itself) that can be
4099 initialized. If there are no more such fields, the return value
4103 next_initializable_field (tree field)
4106 && (TREE_CODE (field) != FIELD_DECL
4107 || (DECL_C_BIT_FIELD (field) && !DECL_NAME (field))
4108 || DECL_ARTIFICIAL (field)))
4109 field = TREE_CHAIN (field);
4114 /* Undo the brace-elision allowed by [dcl.init.aggr] in a
4115 brace-enclosed aggregate initializer.
4117 *INITP is one of a list of initializers describing a brace-enclosed
4118 initializer for an entity of the indicated aggregate TYPE. It may
4119 not presently match the shape of the TYPE; for example:
4121 struct S { int a; int b; };
4122 struct S a[] = { 1, 2, 3, 4 };
4124 Here *INITP will point to TREE_LIST of four elements, rather than a
4125 list of two elements, each itself a list of two elements. This
4126 routine transforms INIT from the former form into the latter. The
4127 revised initializer is returned. */
4130 reshape_init (tree type, tree *initp)
4134 tree old_init_value;
4136 bool brace_enclosed_p;
4139 old_init_value = (TREE_CODE (*initp) == TREE_LIST
4140 ? TREE_VALUE (*initp) : old_init);
4142 my_friendly_assert (old_init_value, 20030723);
4144 /* If the initializer is brace-enclosed, pull initializers from the
4145 enclosed elements. Advance past the brace-enclosed initializer
4147 if (TREE_CODE (old_init_value) == CONSTRUCTOR
4148 && BRACE_ENCLOSED_INITIALIZER_P (old_init_value))
4150 *initp = TREE_CHAIN (old_init);
4151 TREE_CHAIN (old_init) = NULL_TREE;
4152 inits = CONSTRUCTOR_ELTS (old_init_value);
4154 brace_enclosed_p = true;
4159 brace_enclosed_p = false;
4162 /* A non-aggregate type is always initialized with a single
4164 if (!CP_AGGREGATE_TYPE_P (type))
4166 *initp = TREE_CHAIN (old_init);
4167 TREE_CHAIN (old_init) = NULL_TREE;
4168 /* It is invalid to initialize a non-aggregate type with a
4169 brace-enclosed initializer. */
4170 if (brace_enclosed_p)
4172 error ("brace-enclosed initializer used to initialize `%T'",
4174 if (TREE_CODE (old_init) == TREE_LIST)
4175 TREE_VALUE (old_init) = error_mark_node;
4177 old_init = error_mark_node;
4185 All implicit type conversions (clause _conv_) are considered when
4186 initializing the aggregate member with an initializer from an
4187 initializer-list. If the initializer can initialize a member,
4188 the member is initialized. Otherwise, if the member is itself a
4189 non-empty subaggregate, brace elision is assumed and the
4190 initializer is considered for the initialization of the first
4191 member of the subaggregate. */
4192 if (!brace_enclosed_p
4193 && can_convert_arg (type, TREE_TYPE (old_init_value), old_init_value))
4195 *initp = TREE_CHAIN (old_init);
4196 TREE_CHAIN (old_init) = NULL_TREE;
4200 if (TREE_CODE (old_init_value) == STRING_CST
4201 && TREE_CODE (type) == ARRAY_TYPE
4202 && char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (type))))
4204 /* [dcl.init.string]
4206 A char array (whether plain char, signed char, or unsigned char)
4207 can be initialized by a string-literal (optionally enclosed in
4208 braces); a wchar_t array can be initialized by a wide
4209 string-literal (optionally enclosed in braces). */
4210 new_init = old_init;
4211 /* Move past the initializer. */
4212 *initp = TREE_CHAIN (old_init);
4213 TREE_CHAIN (old_init) = NULL_TREE;
4217 /* Build a CONSTRUCTOR to hold the contents of the aggregate. */
4218 new_init = build_constructor (NULL_TREE, NULL_TREE);
4220 if (CLASS_TYPE_P (type))
4224 field = next_initializable_field (TYPE_FIELDS (type));
4230 An initializer for an aggregate member that is an
4231 empty class shall have the form of an empty
4232 initializer-list {}. */
4233 if (!brace_enclosed_p)
4235 error ("initializer for `%T' must be brace-enclosed",
4237 return error_mark_node;
4242 /* Loop through the initializable fields, gathering
4248 /* Handle designated initializers, as an extension. */
4249 if (TREE_PURPOSE (*initp))
4252 pedwarn ("ISO C++ does not allow designated initializers");
4253 field = lookup_field_1 (type, TREE_PURPOSE (*initp),
4254 /*want_type=*/false);
4255 if (!field || TREE_CODE (field) != FIELD_DECL)
4256 error ("`%T' has no non-static data member named `%D'",
4257 type, TREE_PURPOSE (*initp));
4262 field_init = reshape_init (TREE_TYPE (field), initp);
4263 if (field_init == error_mark_node)
4264 return error_mark_node;
4265 TREE_CHAIN (field_init) = CONSTRUCTOR_ELTS (new_init);
4266 CONSTRUCTOR_ELTS (new_init) = field_init;
4269 When a union is initialized with a brace-enclosed
4270 initializer, the braces shall only contain an
4271 initializer for the first member of the union. */
4272 if (TREE_CODE (type) == UNION_TYPE)
4274 field = next_initializable_field (TREE_CHAIN (field));
4278 else if (TREE_CODE (type) == ARRAY_TYPE
4279 || TREE_CODE (type) == VECTOR_TYPE)
4284 /* If the bound of the array is known, take no more initializers
4285 than are allowed. */
4286 max_index = NULL_TREE;
4287 if (TREE_CODE (type) == ARRAY_TYPE)
4289 if (TYPE_DOMAIN (type))
4290 max_index = array_type_nelts (type);
4294 /* For a vector, the representation type is a struct
4295 containing a single member which is an array of the
4296 appropriate size. */
4297 tree rtype = TYPE_DEBUG_REPRESENTATION_TYPE (type);
4298 if (rtype && TYPE_DOMAIN (TREE_TYPE (TYPE_FIELDS (rtype))))
4299 max_index = array_type_nelts (TREE_TYPE (TYPE_FIELDS (rtype)));
4302 /* Loop through the array elements, gathering initializers. */
4303 for (index = size_zero_node;
4304 *initp && (!max_index || !tree_int_cst_lt (max_index, index));
4305 index = size_binop (PLUS_EXPR, index, size_one_node))
4309 element_init = reshape_init (TREE_TYPE (type), initp);
4310 if (element_init == error_mark_node)
4311 return error_mark_node;
4312 TREE_CHAIN (element_init) = CONSTRUCTOR_ELTS (new_init);
4313 CONSTRUCTOR_ELTS (new_init) = element_init;
4314 if (TREE_PURPOSE (element_init))
4316 tree next_index = TREE_PURPOSE (element_init);
4317 if (TREE_CODE (next_index) == IDENTIFIER_NODE)
4319 error ("name `%D' used in a GNU-style designated "
4320 "initializer for an array", next_index);
4321 TREE_PURPOSE (element_init) = NULL_TREE;
4331 /* The initializers were placed in reverse order in the
4333 CONSTRUCTOR_ELTS (new_init) = nreverse (CONSTRUCTOR_ELTS (new_init));
4335 if (TREE_CODE (old_init) == TREE_LIST)
4336 new_init = build_tree_list (TREE_PURPOSE (old_init), new_init);
4339 /* If this was a brace-enclosed initializer and all of the
4340 initializers were not used up, there is a problem. */
4341 if (brace_enclosed_p && *initp)
4342 error ("too many initializers for `%T'", type);
4347 /* Verify INIT (the initializer for DECL), and record the
4348 initialization in DECL_INITIAL, if appropriate. CLEANUP is as for
4349 grok_reference_init.
4351 If the return value is non-NULL, it is an expression that must be
4352 evaluated dynamically to initialize DECL. */
4355 check_initializer (tree decl, tree init, int flags, tree *cleanup)
4357 tree type = TREE_TYPE (decl);
4358 tree init_code = NULL;
4360 /* If `start_decl' didn't like having an initialization, ignore it now. */
4361 if (init != NULL_TREE && DECL_INITIAL (decl) == NULL_TREE)
4364 /* If an initializer is present, DECL_INITIAL has been
4365 error_mark_node, to indicate that an as-of-yet unevaluated
4366 initialization will occur. From now on, DECL_INITIAL reflects
4367 the static initialization -- if any -- of DECL. */
4368 DECL_INITIAL (decl) = NULL_TREE;
4370 /* Things that are going to be initialized need to have complete
4372 TREE_TYPE (decl) = type = complete_type (TREE_TYPE (decl));
4374 if (type == error_mark_node)
4375 /* We will have already complained. */
4377 else if (init && COMPLETE_TYPE_P (type)
4378 && !TREE_CONSTANT (TYPE_SIZE (type)))
4380 error ("variable-sized object `%D' may not be initialized", decl);
4383 else if (TREE_CODE (type) == ARRAY_TYPE
4384 && !COMPLETE_TYPE_P (complete_type (TREE_TYPE (type))))
4386 error ("elements of array `%#D' have incomplete type", decl);
4389 else if (TREE_CODE (type) != ARRAY_TYPE && !COMPLETE_TYPE_P (type))
4391 error ("`%D' has incomplete type", decl);
4392 TREE_TYPE (decl) = error_mark_node;
4396 if (TREE_CODE (decl) == CONST_DECL)
4398 my_friendly_assert (TREE_CODE (decl) != REFERENCE_TYPE, 148);
4400 DECL_INITIAL (decl) = init;
4402 my_friendly_assert (init != NULL_TREE, 149);
4405 else if (!DECL_EXTERNAL (decl) && TREE_CODE (type) == REFERENCE_TYPE)
4406 init = grok_reference_init (decl, type, init, cleanup);
4409 if (TREE_CODE (init) == CONSTRUCTOR
4410 && BRACE_ENCLOSED_INITIALIZER_P (init))
4412 /* [dcl.init] paragraph 13,
4413 If T is a scalar type, then a declaration of the form
4418 reshape_init will complain about the extra braces,
4419 and doesn't do anything useful in the case where TYPE is
4420 scalar, so just don't call it. */
4421 if (CP_AGGREGATE_TYPE_P (type))
4422 init = reshape_init (type, &init);
4424 if ((*targetm.vector_opaque_p) (type))
4426 error ("opaque vector types cannot be initialized");
4427 init = error_mark_node;
4431 /* If DECL has an array type without a specific bound, deduce the
4432 array size from the initializer. */
4433 maybe_deduce_size_from_array_init (decl, init);
4434 type = TREE_TYPE (decl);
4436 if (TYPE_HAS_CONSTRUCTOR (type) || TYPE_NEEDS_CONSTRUCTING (type))
4438 if (TREE_CODE (type) == ARRAY_TYPE)
4439 goto initialize_aggr;
4440 else if (TREE_CODE (init) == CONSTRUCTOR
4441 && BRACE_ENCLOSED_INITIALIZER_P (init))
4443 if (TYPE_NON_AGGREGATE_CLASS (type))
4445 error ("`%D' must be initialized by constructor, not by `{...}'",
4447 init = error_mark_node;
4450 goto dont_use_constructor;
4454 int saved_stmts_are_full_exprs_p;
4457 saved_stmts_are_full_exprs_p = 0;
4458 if (building_stmt_tree ())
4460 saved_stmts_are_full_exprs_p = stmts_are_full_exprs_p ();
4461 current_stmt_tree ()->stmts_are_full_exprs_p = 1;
4463 init = build_aggr_init (decl, init, flags);
4464 if (building_stmt_tree ())
4465 current_stmt_tree ()->stmts_are_full_exprs_p =
4466 saved_stmts_are_full_exprs_p;
4472 dont_use_constructor:
4473 if (TREE_CODE (init) != TREE_VEC)
4475 init_code = store_init_value (decl, init);
4480 else if (DECL_EXTERNAL (decl))
4482 else if (TYPE_P (type) && TYPE_NEEDS_CONSTRUCTING (type))
4483 goto initialize_aggr;
4484 else if (IS_AGGR_TYPE (type))
4486 tree core_type = strip_array_types (type);
4488 if (CLASSTYPE_READONLY_FIELDS_NEED_INIT (core_type))
4489 error ("structure `%D' with uninitialized const members", decl);
4490 if (CLASSTYPE_REF_FIELDS_NEED_INIT (core_type))
4491 error ("structure `%D' with uninitialized reference members",
4494 check_for_uninitialized_const_var (decl);
4497 check_for_uninitialized_const_var (decl);
4499 if (init && init != error_mark_node)
4500 init_code = build2 (INIT_EXPR, type, decl, init);
4505 /* If DECL is not a local variable, give it RTL. */
4508 make_rtl_for_nonlocal_decl (tree decl, tree init, const char* asmspec)
4510 int toplev = toplevel_bindings_p ();
4513 /* Set the DECL_ASSEMBLER_NAME for the object. */
4516 /* The `register' keyword, when used together with an
4517 asm-specification, indicates that the variable should be
4518 placed in a particular register. */
4519 if (TREE_CODE (decl) == VAR_DECL && DECL_REGISTER (decl))
4521 change_decl_assembler_name (decl, get_identifier (asmspec));
4522 DECL_HARD_REGISTER (decl) = 1;
4525 set_user_assembler_name (decl, asmspec);
4528 /* Handle non-variables up front. */
4529 if (TREE_CODE (decl) != VAR_DECL)
4531 rest_of_decl_compilation (decl, toplev, at_eof);
4535 /* If we see a class member here, it should be a static data
4537 if (DECL_LANG_SPECIFIC (decl) && DECL_IN_AGGR_P (decl))
4539 my_friendly_assert (TREE_STATIC (decl), 19990828);
4540 /* An in-class declaration of a static data member should be
4541 external; it is only a declaration, and not a definition. */
4542 if (init == NULL_TREE)
4543 my_friendly_assert (DECL_EXTERNAL (decl), 20000723);
4546 /* We don't create any RTL for local variables. */
4547 if (DECL_FUNCTION_SCOPE_P (decl) && !TREE_STATIC (decl))
4550 /* We defer emission of local statics until the corresponding
4551 DECL_EXPR is expanded. */
4552 defer_p = DECL_FUNCTION_SCOPE_P (decl) || DECL_VIRTUAL_P (decl);
4554 /* We try to defer namespace-scope static constants so that they are
4555 not emitted into the object file unnecessarily. */
4556 if (!DECL_VIRTUAL_P (decl)
4557 && TREE_READONLY (decl)
4558 && DECL_INITIAL (decl) != NULL_TREE
4559 && DECL_INITIAL (decl) != error_mark_node
4560 && ! EMPTY_CONSTRUCTOR_P (DECL_INITIAL (decl))
4562 && !TREE_PUBLIC (decl))
4564 /* Fool with the linkage of static consts according to #pragma
4566 if (!interface_unknown && !TREE_PUBLIC (decl))
4568 TREE_PUBLIC (decl) = 1;
4569 DECL_EXTERNAL (decl) = interface_only;
4574 /* Likewise for template instantiations. */
4575 else if (DECL_LANG_SPECIFIC (decl)
4576 && DECL_IMPLICIT_INSTANTIATION (decl))
4579 /* If we're not deferring, go ahead and assemble the variable. */
4581 rest_of_decl_compilation (decl, toplev, at_eof);
4584 /* Generate code to initialize DECL (a local variable). */
4587 initialize_local_var (tree decl, tree init)
4589 tree type = TREE_TYPE (decl);
4592 my_friendly_assert (TREE_CODE (decl) == VAR_DECL
4593 || TREE_CODE (decl) == RESULT_DECL,
4595 my_friendly_assert (!TREE_STATIC (decl), 20021010);
4597 if (DECL_SIZE (decl) == NULL_TREE)
4599 /* If we used it already as memory, it must stay in memory. */
4600 DECL_INITIAL (decl) = NULL_TREE;
4601 TREE_ADDRESSABLE (decl) = TREE_USED (decl);
4604 if (DECL_SIZE (decl) && type != error_mark_node)
4608 /* Compute and store the initial value. */
4609 already_used = TREE_USED (decl) || TREE_USED (type);
4611 /* Perform the initialization. */
4614 int saved_stmts_are_full_exprs_p;
4616 my_friendly_assert (building_stmt_tree (), 20000906);
4617 saved_stmts_are_full_exprs_p = stmts_are_full_exprs_p ();
4618 current_stmt_tree ()->stmts_are_full_exprs_p = 1;
4619 finish_expr_stmt (init);
4620 current_stmt_tree ()->stmts_are_full_exprs_p =
4621 saved_stmts_are_full_exprs_p;
4624 /* Set this to 0 so we can tell whether an aggregate which was
4625 initialized was ever used. Don't do this if it has a
4626 destructor, so we don't complain about the 'resource
4627 allocation is initialization' idiom. Now set
4628 attribute((unused)) on types so decls of that type will be
4629 marked used. (see TREE_USED, above.) */
4630 if (TYPE_NEEDS_CONSTRUCTING (type)
4632 && TYPE_HAS_TRIVIAL_DESTRUCTOR (type)
4633 && DECL_NAME (decl))
4634 TREE_USED (decl) = 0;
4635 else if (already_used)
4636 TREE_USED (decl) = 1;
4639 /* Generate a cleanup, if necessary. */
4640 cleanup = cxx_maybe_build_cleanup (decl);
4641 if (DECL_SIZE (decl) && cleanup)
4642 finish_decl_cleanup (decl, cleanup);
4645 /* Finish processing of a declaration;
4646 install its line number and initial value.
4647 If the length of an array type is not known before,
4648 it must be determined now, from the initial value, or it is an error.
4650 INIT holds the value of an initializer that should be allowed to escape
4653 FLAGS is LOOKUP_ONLYCONVERTING if the = init syntax was used, else 0
4654 if the (init) syntax was used. */
4657 cp_finish_decl (tree decl, tree init, tree asmspec_tree, int flags)
4660 tree ttype = NULL_TREE;
4662 const char *asmspec = NULL;
4663 int was_readonly = 0;
4665 if (decl == error_mark_node)
4670 error ("assignment (not initialization) in declaration");
4674 my_friendly_assert (TREE_CODE (decl) != RESULT_DECL, 20030619);
4676 /* Assume no cleanup is required. */
4677 cleanup = NULL_TREE;
4679 /* If a name was specified, get the string. */
4680 if (global_scope_p (current_binding_level))
4681 asmspec_tree = maybe_apply_renaming_pragma (decl, asmspec_tree);
4683 asmspec = TREE_STRING_POINTER (asmspec_tree);
4685 if (init && TREE_CODE (init) == NAMESPACE_DECL)
4687 error ("cannot initialize `%D' to namespace `%D'",
4692 if (current_class_type
4693 && CP_DECL_CONTEXT (decl) == current_class_type
4694 && TYPE_BEING_DEFINED (current_class_type)
4695 && (DECL_INITIAL (decl) || init))
4696 DECL_INITIALIZED_IN_CLASS_P (decl) = 1;
4698 type = TREE_TYPE (decl);
4700 if (type == error_mark_node)
4703 if (TYPE_HAS_MUTABLE_P (type))
4704 TREE_READONLY (decl) = 0;
4706 if (processing_template_decl)
4708 /* Add this declaration to the statement-tree. */
4709 if (at_function_scope_p ())
4710 add_decl_expr (decl);
4712 if (init && DECL_INITIAL (decl))
4713 DECL_INITIAL (decl) = init;
4714 if (TREE_CODE (decl) == VAR_DECL
4715 && !DECL_PRETTY_FUNCTION_P (decl)
4716 && !dependent_type_p (TREE_TYPE (decl)))
4717 maybe_deduce_size_from_array_init (decl, init);
4721 /* Parameters are handled by store_parm_decls, not cp_finish_decl. */
4722 my_friendly_assert (TREE_CODE (decl) != PARM_DECL, 19990828);
4724 /* Take care of TYPE_DECLs up front. */
4725 if (TREE_CODE (decl) == TYPE_DECL)
4727 if (type != error_mark_node
4728 && IS_AGGR_TYPE (type) && DECL_NAME (decl))
4730 if (TREE_TYPE (DECL_NAME (decl)) && TREE_TYPE (decl) != type)
4731 warning ("shadowing previous type declaration of `%#D'", decl);
4732 set_identifier_type_value (DECL_NAME (decl), decl);
4735 /* If we have installed this as the canonical typedef for this
4736 type, and that type has not been defined yet, delay emitting
4737 the debug information for it, as we will emit it later. */
4738 if (TYPE_MAIN_DECL (TREE_TYPE (decl)) == decl
4739 && !COMPLETE_TYPE_P (TREE_TYPE (decl)))
4740 TYPE_DECL_SUPPRESS_DEBUG (decl) = 1;
4742 rest_of_decl_compilation (decl, DECL_CONTEXT (decl) == NULL_TREE,
4747 if (TREE_CODE (decl) != FUNCTION_DECL)
4748 ttype = target_type (type);
4751 /* Currently, GNU C++ puts constants in text space, making them
4752 impossible to initialize. In the future, one would hope for
4753 an operating system which understood the difference between
4754 initialization and the running of a program. */
4755 if (! DECL_EXTERNAL (decl) && TREE_READONLY (decl))
4758 if (TYPE_NEEDS_CONSTRUCTING (type)
4759 || TREE_CODE (type) == REFERENCE_TYPE)
4760 TREE_READONLY (decl) = 0;
4763 if (TREE_CODE (decl) == VAR_DECL)
4765 /* Only PODs can have thread-local storage. Other types may require
4766 various kinds of non-trivial initialization. */
4767 if (DECL_THREAD_LOCAL (decl) && !pod_type_p (TREE_TYPE (decl)))
4768 error ("`%D' cannot be thread-local because it has non-POD type `%T'",
4769 decl, TREE_TYPE (decl));
4770 /* Convert the initializer to the type of DECL, if we have not
4771 already initialized DECL. */
4772 if (!DECL_INITIALIZED_P (decl)
4773 /* If !DECL_EXTERNAL then DECL is being defined. In the
4774 case of a static data member initialized inside the
4775 class-specifier, there can be an initializer even if DECL
4776 is *not* defined. */
4777 && (!DECL_EXTERNAL (decl) || init))
4779 init = check_initializer (decl, init, flags, &cleanup);
4780 /* Thread-local storage cannot be dynamically initialized. */
4781 if (DECL_THREAD_LOCAL (decl) && init)
4783 error ("`%D' is thread-local and so cannot be dynamically "
4784 "initialized", decl);
4791 The memory occupied by any object of static storage
4792 duration is zero-initialized at program startup before
4793 any other initialization takes place.
4795 We cannot create an appropriate initializer until after
4796 the type of DECL is finalized. If DECL_INITIAL is set,
4797 then the DECL is statically initialized, and any
4798 necessary zero-initialization has already been performed. */
4799 if (TREE_STATIC (decl) && !DECL_INITIAL (decl))
4800 DECL_INITIAL (decl) = build_zero_init (TREE_TYPE (decl),
4801 /*nelts=*/NULL_TREE,
4802 /*static_storage_p=*/true);
4803 /* Remember that the initialization for this variable has
4805 DECL_INITIALIZED_P (decl) = 1;
4806 /* The variable is being defined, so determine its
4808 determine_visibility (decl);
4810 /* If the variable has an array type, lay out the type, even if
4811 there is no initializer. It is valid to index through the
4812 array, and we must get TYPE_ALIGN set correctly on the array
4814 else if (TREE_CODE (type) == ARRAY_TYPE)
4818 /* Add this declaration to the statement-tree. This needs to happen
4819 after the call to check_initializer so that the DECL_EXPR for a
4820 reference temp is added before the DECL_EXPR for the reference itself. */
4821 if (at_function_scope_p ())
4822 add_decl_expr (decl);
4824 if (TREE_CODE (decl) == VAR_DECL)
4825 layout_var_decl (decl);
4827 /* Output the assembler code and/or RTL code for variables and functions,
4828 unless the type is an undefined structure or union.
4829 If not, it will get done when the type is completed. */
4830 if (TREE_CODE (decl) == VAR_DECL || TREE_CODE (decl) == FUNCTION_DECL)
4832 if (TREE_CODE (decl) == VAR_DECL)
4833 maybe_commonize_var (decl);
4835 make_rtl_for_nonlocal_decl (decl, init, asmspec);
4837 /* Check for abstractness of the type. Notice that there is no
4838 need to strip array types here since the check for those types
4839 is already done within create_array_type_for_decl. */
4840 if (TREE_CODE (type) == FUNCTION_TYPE
4841 || TREE_CODE (type) == METHOD_TYPE)
4842 abstract_virtuals_error (decl, TREE_TYPE (type));
4844 abstract_virtuals_error (decl, type);
4846 if (TREE_CODE (decl) == FUNCTION_DECL
4847 || TREE_TYPE (decl) == error_mark_node)
4848 /* No initialization required. */
4850 else if (DECL_EXTERNAL (decl)
4851 && ! (DECL_LANG_SPECIFIC (decl)
4852 && DECL_NOT_REALLY_EXTERN (decl)))
4855 DECL_INITIAL (decl) = init;
4859 /* A variable definition. */
4860 if (DECL_FUNCTION_SCOPE_P (decl))
4862 /* Initialize the local variable. */
4863 if (processing_template_decl)
4865 if (init || DECL_INITIAL (decl) == error_mark_node)
4866 DECL_INITIAL (decl) = init;
4868 else if (!TREE_STATIC (decl))
4869 initialize_local_var (decl, init);
4872 if (TREE_STATIC (decl))
4873 expand_static_init (decl, init);
4877 /* If a CLEANUP_STMT was created to destroy a temporary bound to a
4878 reference, insert it in the statement-tree now. */
4880 push_cleanup (decl, cleanup, false);
4885 TREE_READONLY (decl) = 1;
4887 /* If this was marked 'used', be sure it will be output. */
4888 if (lookup_attribute ("used", DECL_ATTRIBUTES (decl)))
4889 mark_decl_referenced (decl);
4892 /* This is here for a midend callback from c-common.c. */
4895 finish_decl (tree decl, tree init, tree asmspec_tree)
4897 cp_finish_decl (decl, init, asmspec_tree, 0);
4900 /* Returns a declaration for a VAR_DECL as if:
4902 extern "C" TYPE NAME;
4904 had been seen. Used to create compiler-generated global
4908 declare_global_var (tree name, tree type)
4912 push_to_top_level ();
4913 decl = build_decl (VAR_DECL, name, type);
4914 TREE_PUBLIC (decl) = 1;
4915 DECL_EXTERNAL (decl) = 1;
4916 DECL_ARTIFICIAL (decl) = 1;
4918 cp_finish_decl (decl, NULL_TREE, NULL_TREE, 0);
4919 pop_from_top_level ();
4924 /* Returns a pointer to the `atexit' function. Note that if
4925 FLAG_USE_CXA_ATEXIT is nonzero, then this will actually be the new
4926 `__cxa_atexit' function specified in the IA64 C++ ABI. */
4929 get_atexit_node (void)
4940 if (flag_use_cxa_atexit)
4942 /* The declaration for `__cxa_atexit' is:
4944 int __cxa_atexit (void (*)(void *), void *, void *)
4946 We build up the argument types and then then function type
4949 /* First, build the pointer-to-function type for the first
4951 arg_types = tree_cons (NULL_TREE, ptr_type_node, void_list_node);
4952 fn_type = build_function_type (void_type_node, arg_types);
4953 fn_ptr_type = build_pointer_type (fn_type);
4954 /* Then, build the rest of the argument types. */
4955 arg_types = tree_cons (NULL_TREE, ptr_type_node, void_list_node);
4956 arg_types = tree_cons (NULL_TREE, ptr_type_node, arg_types);
4957 arg_types = tree_cons (NULL_TREE, fn_ptr_type, arg_types);
4958 /* And the final __cxa_atexit type. */
4959 fn_type = build_function_type (integer_type_node, arg_types);
4960 fn_ptr_type = build_pointer_type (fn_type);
4961 name = "__cxa_atexit";
4965 /* The declaration for `atexit' is:
4967 int atexit (void (*)());
4969 We build up the argument types and then then function type
4971 fn_type = build_function_type (void_type_node, void_list_node);
4972 fn_ptr_type = build_pointer_type (fn_type);
4973 arg_types = tree_cons (NULL_TREE, fn_ptr_type, void_list_node);
4974 /* Build the final atexit type. */
4975 fn_type = build_function_type (integer_type_node, arg_types);
4979 /* Now, build the function declaration. */
4980 push_lang_context (lang_name_c);
4981 atexit_fndecl = build_library_fn_ptr (name, fn_type);
4982 mark_used (atexit_fndecl);
4983 pop_lang_context ();
4984 atexit_node = decay_conversion (atexit_fndecl);
4989 /* Returns the __dso_handle VAR_DECL. */
4992 get_dso_handle_node (void)
4994 if (dso_handle_node)
4995 return dso_handle_node;
4997 /* Declare the variable. */
4998 dso_handle_node = declare_global_var (get_identifier ("__dso_handle"),
5001 return dso_handle_node;
5004 /* Begin a new function with internal linkage whose job will be simply
5005 to destroy some particular variable. */
5007 static GTY(()) int start_cleanup_cnt;
5010 start_cleanup_fn (void)
5012 int old_interface_only = interface_only;
5013 int old_interface_unknown = interface_unknown;
5019 push_to_top_level ();
5021 /* No need to mangle this. */
5022 push_lang_context (lang_name_c);
5025 interface_unknown = 1;
5027 /* Build the parameter-types. */
5028 parmtypes = void_list_node;
5029 /* Functions passed to __cxa_atexit take an additional parameter.
5030 We'll just ignore it. After we implement the new calling
5031 convention for destructors, we can eliminate the use of
5032 additional cleanup functions entirely in the -fnew-abi case. */
5033 if (flag_use_cxa_atexit)
5034 parmtypes = tree_cons (NULL_TREE, ptr_type_node, parmtypes);
5035 /* Build the function type itself. */
5036 fntype = build_function_type (void_type_node, parmtypes);
5037 /* Build the name of the function. */
5038 sprintf (name, "__tcf_%d", start_cleanup_cnt++);
5039 /* Build the function declaration. */
5040 fndecl = build_lang_decl (FUNCTION_DECL, get_identifier (name), fntype);
5041 /* It's a function with internal linkage, generated by the
5043 TREE_PUBLIC (fndecl) = 0;
5044 DECL_ARTIFICIAL (fndecl) = 1;
5045 /* Make the function `inline' so that it is only emitted if it is
5046 actually needed. It is unlikely that it will be inlined, since
5047 it is only called via a function pointer, but we avoid unnecessary
5048 emissions this way. */
5049 DECL_INLINE (fndecl) = 1;
5050 DECL_DECLARED_INLINE_P (fndecl) = 1;
5051 DECL_INTERFACE_KNOWN (fndecl) = 1;
5052 /* Build the parameter. */
5053 if (flag_use_cxa_atexit)
5057 parmdecl = cp_build_parm_decl (NULL_TREE, ptr_type_node);
5058 DECL_CONTEXT (parmdecl) = fndecl;
5059 TREE_USED (parmdecl) = 1;
5060 DECL_ARGUMENTS (fndecl) = parmdecl;
5064 start_preparsed_function (fndecl, NULL_TREE, SF_PRE_PARSED);
5066 interface_unknown = old_interface_unknown;
5067 interface_only = old_interface_only;
5069 pop_lang_context ();
5071 return current_function_decl;
5074 /* Finish the cleanup function begun by start_cleanup_fn. */
5077 end_cleanup_fn (void)
5079 expand_or_defer_fn (finish_function (0));
5081 pop_from_top_level ();
5084 /* Generate code to handle the destruction of DECL, an object with
5085 static storage duration. */
5088 register_dtor_fn (tree decl)
5095 if (TYPE_HAS_TRIVIAL_DESTRUCTOR (TREE_TYPE (decl)))
5098 /* Call build_cleanup before we enter the anonymous function so that
5099 any access checks will be done relative to the current scope,
5100 rather than the scope of the anonymous function. */
5101 build_cleanup (decl);
5103 /* Now start the function. */
5104 cleanup = start_cleanup_fn ();
5106 /* Now, recompute the cleanup. It may contain SAVE_EXPRs that refer
5107 to the original function, rather than the anonymous one. That
5108 will make the back-end think that nested functions are in use,
5109 which causes confusion. */
5111 push_deferring_access_checks (dk_no_check);
5112 fcall = build_cleanup (decl);
5113 pop_deferring_access_checks ();
5115 /* Create the body of the anonymous function. */
5116 compound_stmt = begin_compound_stmt (BCS_FN_BODY);
5117 finish_expr_stmt (fcall);
5118 finish_compound_stmt (compound_stmt);
5121 /* Call atexit with the cleanup function. */
5122 cxx_mark_addressable (cleanup);
5123 mark_used (cleanup);
5124 cleanup = build_unary_op (ADDR_EXPR, cleanup, 0);
5125 if (flag_use_cxa_atexit)
5127 args = tree_cons (NULL_TREE,
5128 build_unary_op (ADDR_EXPR, get_dso_handle_node (), 0),
5130 args = tree_cons (NULL_TREE, null_pointer_node, args);
5131 args = tree_cons (NULL_TREE, cleanup, args);
5134 args = tree_cons (NULL_TREE, cleanup, NULL_TREE);
5135 finish_expr_stmt (build_function_call (get_atexit_node (), args));
5138 /* DECL is a VAR_DECL with static storage duration. INIT, if present,
5139 is its initializer. Generate code to handle the construction
5140 and destruction of DECL. */
5143 expand_static_init (tree decl, tree init)
5145 my_friendly_assert (TREE_CODE (decl) == VAR_DECL, 20021010);
5146 my_friendly_assert (TREE_STATIC (decl), 20021010);
5148 /* Some variables require no initialization. */
5150 && !TYPE_NEEDS_CONSTRUCTING (TREE_TYPE (decl))
5151 && TYPE_HAS_TRIVIAL_DESTRUCTOR (TREE_TYPE (decl)))
5154 if (! toplevel_bindings_p ())
5156 /* Emit code to perform this initialization but once. */
5163 /* Emit code to perform this initialization but once. This code
5166 static int guard = 0;
5168 // Do initialization.
5170 // Register variable for destruction at end of program.
5173 Note that the `temp' variable is only set to 1 *after* the
5174 initialization is complete. This ensures that an exception,
5175 thrown during the construction, will cause the variable to
5176 reinitialized when we pass through this code again, as per:
5180 If the initialization exits by throwing an exception, the
5181 initialization is not complete, so it will be tried again
5182 the next time control enters the declaration.
5184 In theory, this process should be thread-safe, too; multiple
5185 threads should not be able to initialize the variable more
5186 than once. We don't yet attempt to ensure thread-safety. */
5188 /* Create the guard variable. */
5189 guard = get_guard (decl);
5191 /* Begin the conditional initialization. */
5192 if_stmt = begin_if_stmt ();
5193 finish_if_stmt_cond (get_guard_cond (guard), if_stmt);
5194 then_clause = begin_compound_stmt (0);
5196 /* Do the initialization itself. */
5197 assignment = init ? init : NULL_TREE;
5199 /* Once the assignment is complete, set TEMP to 1. Since the
5200 construction of the static object is complete at this point,
5201 we want to make sure TEMP is set to 1 even if a temporary
5202 constructed during the initialization throws an exception
5203 when it is destroyed. So, we combine the initialization and
5204 the assignment to TEMP into a single expression, ensuring
5205 that when we call finish_expr_stmt the cleanups will not be
5206 run until after TEMP is set to 1. */
5207 guard_init = set_guard (guard);
5209 assignment = build_compound_expr (assignment, guard_init);
5211 assignment = guard_init;
5212 finish_expr_stmt (assignment);
5214 /* Use atexit to register a function for destroying this static
5216 register_dtor_fn (decl);
5218 finish_compound_stmt (then_clause);
5219 finish_then_clause (if_stmt);
5220 finish_if_stmt (if_stmt);
5223 static_aggregates = tree_cons (init, decl, static_aggregates);
5227 /* Make TYPE a complete type based on INITIAL_VALUE.
5228 Return 0 if successful, 1 if INITIAL_VALUE can't be deciphered,
5229 2 if there was no information (in which case assume 0 if DO_DEFAULT). */
5232 complete_array_type (tree type, tree initial_value, int do_default)
5234 tree maxindex = NULL_TREE;
5239 /* An array of character type can be initialized from a
5240 brace-enclosed string constant. */
5241 if (char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (type)))
5242 && TREE_CODE (initial_value) == CONSTRUCTOR
5243 && CONSTRUCTOR_ELTS (initial_value)
5244 && (TREE_CODE (TREE_VALUE (CONSTRUCTOR_ELTS (initial_value)))
5246 && TREE_CHAIN (CONSTRUCTOR_ELTS (initial_value)) == NULL_TREE)
5247 initial_value = TREE_VALUE (CONSTRUCTOR_ELTS (initial_value));
5249 /* Note MAXINDEX is really the maximum index, one less than the
5251 if (TREE_CODE (initial_value) == STRING_CST)
5254 = int_size_in_bytes (TREE_TYPE (TREE_TYPE (initial_value)));
5255 maxindex = build_int_cst (NULL_TREE,
5256 (TREE_STRING_LENGTH (initial_value)
5259 else if (TREE_CODE (initial_value) == CONSTRUCTOR)
5261 tree elts = CONSTRUCTOR_ELTS (initial_value);
5263 maxindex = ssize_int (-1);
5264 for (; elts; elts = TREE_CHAIN (elts))
5266 if (TREE_PURPOSE (elts))
5267 maxindex = TREE_PURPOSE (elts);
5269 maxindex = size_binop (PLUS_EXPR, maxindex, ssize_int (1));
5274 /* Make an error message unless that happened already. */
5275 if (initial_value != error_mark_node)
5278 initial_value = NULL_TREE;
5280 /* Prevent further error messages. */
5281 maxindex = build_int_cst (NULL_TREE, 0, 0);
5288 maxindex = build_int_cst (NULL_TREE, 0, 0);
5298 domain = build_index_type (maxindex);
5299 TYPE_DOMAIN (type) = domain;
5302 itype = TREE_TYPE (initial_value);
5305 if (itype && !TYPE_DOMAIN (itype))
5306 TYPE_DOMAIN (itype) = domain;
5307 /* The type of the main variant should never be used for arrays
5308 of different sizes. It should only ever be completed with the
5309 size of the array. */
5310 if (! TYPE_DOMAIN (TYPE_MAIN_VARIANT (type)))
5311 TYPE_DOMAIN (TYPE_MAIN_VARIANT (type)) = domain;
5313 elt_type = TREE_TYPE (type);
5314 TYPE_NEEDS_CONSTRUCTING (type)
5315 = TYPE_NEEDS_CONSTRUCTING (TYPE_MAIN_VARIANT (elt_type));
5316 TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type)
5317 = TYPE_HAS_NONTRIVIAL_DESTRUCTOR (TYPE_MAIN_VARIANT (elt_type));
5320 /* Lay out the type now that we can get the real answer. */
5327 /* Return zero if something is declared to be a member of type
5328 CTYPE when in the context of CUR_TYPE. STRING is the error
5329 message to print in that case. Otherwise, quietly return 1. */
5332 member_function_or_else (tree ctype, tree cur_type, enum overload_flags flags)
5334 if (ctype && ctype != cur_type)
5336 if (flags == DTOR_FLAG)
5337 error ("destructor for alien class `%T' cannot be a member",
5340 error ("constructor for alien class `%T' cannot be a member",
5347 /* Subroutine of `grokdeclarator'. */
5349 /* Generate errors possibly applicable for a given set of specifiers.
5350 This is for ARM $7.1.2. */
5353 bad_specifiers (tree object,
5362 error ("`%D' declared as a `virtual' %s", object, type);
5364 error ("`%D' declared as an `inline' %s", object, type);
5366 error ("`const' and `volatile' function specifiers on `%D' invalid in %s declaration",
5369 cp_error_at ("`%D' declared as a friend", object);
5371 && (TREE_CODE (object) == TYPE_DECL
5372 || (!TYPE_PTRFN_P (TREE_TYPE (object))
5373 && !TYPE_REFFN_P (TREE_TYPE (object))
5374 && !TYPE_PTRMEMFUNC_P (TREE_TYPE (object)))))
5375 cp_error_at ("`%D' declared with an exception specification", object);
5378 /* CTYPE is class type, or null if non-class.
5379 TYPE is type this FUNCTION_DECL should have, either FUNCTION_TYPE
5381 DECLARATOR is the function's name.
5382 PARMS is a chain of PARM_DECLs for the function.
5383 VIRTUALP is truthvalue of whether the function is virtual or not.
5384 FLAGS are to be passed through to `grokclassfn'.
5385 QUALS are qualifiers indicating whether the function is `const'
5387 RAISES is a list of exceptions that this function can raise.
5388 CHECK is 1 if we must find this method in CTYPE, 0 if we should
5389 not look, and -1 if we should not call `grokclassfn' at all.
5391 Returns `NULL_TREE' if something goes wrong, after issuing
5392 applicable error messages. */
5395 grokfndecl (tree ctype,
5399 tree orig_declarator,
5401 enum overload_flags flags,
5413 int staticp = ctype && TREE_CODE (type) == FUNCTION_TYPE;
5414 int has_default_arg = 0;
5418 type = build_exception_variant (type, raises);
5420 decl = build_lang_decl (FUNCTION_DECL, declarator, type);
5421 DECL_ARGUMENTS (decl) = parms;
5422 /* Propagate volatile out from type to decl. */
5423 if (TYPE_VOLATILE (type))
5424 TREE_THIS_VOLATILE (decl) = 1;
5426 /* If this decl has namespace scope, set that up. */
5428 set_decl_namespace (decl, in_namespace, friendp);
5430 DECL_CONTEXT (decl) = FROB_CONTEXT (current_namespace);
5432 /* `main' and builtins have implicit 'C' linkage. */
5433 if ((MAIN_NAME_P (declarator)
5434 || (IDENTIFIER_LENGTH (declarator) > 10
5435 && IDENTIFIER_POINTER (declarator)[0] == '_'
5436 && IDENTIFIER_POINTER (declarator)[1] == '_'
5437 && strncmp (IDENTIFIER_POINTER (declarator)+2, "builtin_", 8) == 0))
5438 && current_lang_name == lang_name_cplusplus
5439 && ctype == NULL_TREE
5440 /* NULL_TREE means global namespace. */
5441 && DECL_CONTEXT (decl) == NULL_TREE)
5442 SET_DECL_LANGUAGE (decl, lang_c);
5444 /* Should probably propagate const out from type to decl I bet (mrs). */
5447 DECL_STATIC_FUNCTION_P (decl) = 1;
5448 DECL_CONTEXT (decl) = ctype;
5452 DECL_CONTEXT (decl) = ctype;
5454 if (ctype == NULL_TREE && DECL_MAIN_P (decl))
5456 if (processing_template_decl)
5457 error ("cannot declare `::main' to be a template");
5459 error ("cannot declare `::main' to be inline");
5461 error ("cannot declare `::main' to be static");
5462 if (!same_type_p (TREE_TYPE (TREE_TYPE (decl)),
5464 error ("`main' must return `int'");
5469 /* Members of anonymous types and local classes have no linkage; make
5470 them internal. If a typedef is made later, this will be changed. */
5471 if (ctype && (TYPE_ANONYMOUS_P (ctype)
5472 || decl_function_context (TYPE_MAIN_DECL (ctype))))
5477 /* [basic.link]: A name with no linkage (notably, the name of a class
5478 or enumeration declared in a local scope) shall not be used to
5479 declare an entity with linkage.
5481 Only check this for public decls for now. See core 319, 389. */
5482 t = no_linkage_check (TREE_TYPE (decl),
5483 /*relaxed_p=*/false);
5486 if (TYPE_ANONYMOUS_P (t))
5488 if (DECL_EXTERN_C_P (decl))
5489 /* Allow this; it's pretty common in C. */;
5492 pedwarn ("non-local function `%#D' uses anonymous type",
5494 if (DECL_ORIGINAL_TYPE (TYPE_NAME (t)))
5496 `%#D' does not refer to the unqualified type, so it is not used for linkage",
5501 pedwarn ("non-local function `%#D' uses local type `%T'",
5506 TREE_PUBLIC (decl) = publicp;
5509 DECL_INTERFACE_KNOWN (decl) = 1;
5510 DECL_NOT_REALLY_EXTERN (decl) = 1;
5513 /* If the declaration was declared inline, mark it as such. */
5515 DECL_DECLARED_INLINE_P (decl) = 1;
5516 /* We inline functions that are explicitly declared inline, or, when
5517 the user explicitly asks us to, all functions. */
5518 if (DECL_DECLARED_INLINE_P (decl)
5519 || (flag_inline_trees == 2 && !DECL_INLINE (decl) && funcdef_flag))
5520 DECL_INLINE (decl) = 1;
5522 DECL_EXTERNAL (decl) = 1;
5523 if (quals && TREE_CODE (type) == FUNCTION_TYPE)
5525 error ("%smember function `%D' cannot have cv-qualifier",
5526 (ctype ? "static " : "non-"), decl);
5527 quals = TYPE_UNQUALIFIED;
5530 if (IDENTIFIER_OPNAME_P (DECL_NAME (decl)))
5531 grok_op_properties (decl, friendp, /*complain=*/true);
5533 if (ctype && decl_function_context (decl))
5534 DECL_NO_STATIC_CHAIN (decl) = 1;
5536 for (t = TYPE_ARG_TYPES (TREE_TYPE (decl)); t; t = TREE_CHAIN (t))
5537 if (TREE_PURPOSE (t)
5538 && TREE_CODE (TREE_PURPOSE (t)) == DEFAULT_ARG)
5540 has_default_arg = 1;
5545 && TREE_CODE (orig_declarator) == TEMPLATE_ID_EXPR)
5549 ("defining explicit specialization `%D' in friend declaration",
5553 tree fns = TREE_OPERAND (orig_declarator, 0);
5554 tree args = TREE_OPERAND (orig_declarator, 1);
5556 if (PROCESSING_REAL_TEMPLATE_DECL_P ())
5558 /* Something like `template <class T> friend void f<T>()'. */
5559 error ("invalid use of template-id `%D' in declaration of primary template",
5565 /* A friend declaration of the form friend void f<>(). Record
5566 the information in the TEMPLATE_ID_EXPR. */
5567 SET_DECL_IMPLICIT_INSTANTIATION (decl);
5569 if (TREE_CODE (fns) == COMPONENT_REF)
5571 /* Due to bison parser ickiness, we will have already looked
5572 up an operator_name or PFUNCNAME within the current class
5573 (see template_id in parse.y). If the current class contains
5574 such a name, we'll get a COMPONENT_REF here. Undo that. */
5576 my_friendly_assert (TREE_TYPE (TREE_OPERAND (fns, 0))
5577 == current_class_type, 20001120);
5578 fns = TREE_OPERAND (fns, 1);
5580 my_friendly_assert (TREE_CODE (fns) == IDENTIFIER_NODE
5581 || TREE_CODE (fns) == OVERLOAD, 20001120);
5582 DECL_TEMPLATE_INFO (decl) = tree_cons (fns, args, NULL_TREE);
5584 if (has_default_arg)
5586 error ("default arguments are not allowed in declaration of friend template specialization `%D'",
5593 error ("`inline' is not allowed in declaration of friend template specialization `%D'",
5601 /* Make the init_value nonzero so pushdecl knows this is not
5602 tentative. error_mark_node is replaced later with the BLOCK. */
5603 DECL_INITIAL (decl) = error_mark_node;
5605 if (TYPE_NOTHROW_P (type) || nothrow_libfn_p (decl))
5606 TREE_NOTHROW (decl) = 1;
5608 /* Caller will do the rest of this. */
5612 if (flags == NO_SPECIAL && ctype && constructor_name_p (declarator, ctype))
5613 DECL_CONSTRUCTOR_P (decl) = 1;
5615 /* Function gets the ugly name, field gets the nice one. This call
5616 may change the type of the function (because of default
5618 if (ctype != NULL_TREE)
5619 grokclassfn (ctype, decl, flags, quals);
5621 decl = check_explicit_specialization (orig_declarator, decl,
5623 2 * (funcdef_flag != 0) +
5624 4 * (friendp != 0));
5625 if (decl == error_mark_node)
5628 if (ctype != NULL_TREE
5629 && (! TYPE_FOR_JAVA (ctype) || check_java_method (decl))
5634 old_decl = check_classfn (ctype, decl,
5635 (processing_template_decl
5636 > template_class_depth (ctype))
5637 ? current_template_parms
5640 if (old_decl && TREE_CODE (old_decl) == TEMPLATE_DECL)
5641 /* Because grokfndecl is always supposed to return a
5642 FUNCTION_DECL, we pull out the DECL_TEMPLATE_RESULT
5643 here. We depend on our callers to figure out that its
5644 really a template that's being returned. */
5645 old_decl = DECL_TEMPLATE_RESULT (old_decl);
5647 if (old_decl && DECL_STATIC_FUNCTION_P (old_decl)
5648 && TREE_CODE (TREE_TYPE (decl)) == METHOD_TYPE)
5649 /* Remove the `this' parm added by grokclassfn.
5650 XXX Isn't this done in start_function, too? */
5651 revert_static_member_fn (decl);
5652 if (old_decl && DECL_ARTIFICIAL (old_decl))
5653 error ("definition of implicitly-declared `%D'", old_decl);
5660 /* Since we've smashed OLD_DECL to its
5661 DECL_TEMPLATE_RESULT, we must do the same to DECL. */
5662 if (TREE_CODE (decl) == TEMPLATE_DECL)
5663 decl = DECL_TEMPLATE_RESULT (decl);
5665 /* Attempt to merge the declarations. This can fail, in
5666 the case of some invalid specialization declarations. */
5667 pop_p = push_scope (ctype);
5668 ok = duplicate_decls (decl, old_decl);
5673 error ("no `%#D' member function declared in class `%T'",
5681 if (DECL_CONSTRUCTOR_P (decl) && !grok_ctor_properties (ctype, decl))
5684 if (ctype == NULL_TREE || check)
5688 DECL_VIRTUAL_P (decl) = 1;
5693 /* DECL is a VAR_DECL for a static data member. Set flags to reflect
5694 the linkage that DECL will receive in the object file. */
5697 set_linkage_for_static_data_member (tree decl)
5699 /* A static data member always has static storage duration and
5700 external linkage. Note that static data members are forbidden in
5701 local classes -- the only situation in which a class has
5702 non-external linkage. */
5703 TREE_PUBLIC (decl) = 1;
5704 TREE_STATIC (decl) = 1;
5705 /* For non-template classes, static data members are always put
5706 out in exactly those files where they are defined, just as
5707 with ordinarly namespace-scope variables. */
5708 if (!processing_template_decl)
5709 DECL_INTERFACE_KNOWN (decl) = 1;
5712 /* Create a VAR_DECL named NAME with the indicated TYPE.
5714 If SCOPE is non-NULL, it is the class type or namespace containing
5715 the variable. If SCOPE is NULL, the variable should is created in
5716 the innermost enclosings scope. */
5719 grokvardecl (tree type,
5721 const cp_decl_specifier_seq *declspecs,
5728 my_friendly_assert (!name || TREE_CODE (name) == IDENTIFIER_NODE,
5731 /* Compute the scope in which to place the variable. */
5734 /* An explicit "extern" specifier indicates a namespace-scope
5736 if (declspecs->storage_class == sc_extern)
5737 scope = current_namespace;
5738 else if (!at_function_scope_p ())
5740 scope = current_scope ();
5742 scope = current_namespace;
5747 && (/* If the variable is a namespace-scope variable declared in a
5748 template, we need DECL_LANG_SPECIFIC. */
5749 (TREE_CODE (scope) == NAMESPACE_DECL && processing_template_decl)
5750 /* Similarly for namespace-scope variables with language linkage
5752 || (TREE_CODE (scope) == NAMESPACE_DECL
5753 && current_lang_name != lang_name_cplusplus)
5754 /* Similarly for static data members. */
5756 decl = build_lang_decl (VAR_DECL, name, type);
5758 decl = build_decl (VAR_DECL, name, type);
5760 if (scope && TREE_CODE (scope) == NAMESPACE_DECL)
5761 set_decl_namespace (decl, scope, 0);
5763 DECL_CONTEXT (decl) = scope;
5765 if (declspecs->storage_class == sc_extern)
5767 DECL_THIS_EXTERN (decl) = 1;
5768 DECL_EXTERNAL (decl) = !initialized;
5771 if (DECL_CLASS_SCOPE_P (decl))
5773 set_linkage_for_static_data_member (decl);
5774 /* This function is only called with out-of-class definitions. */
5775 DECL_EXTERNAL (decl) = 0;
5777 /* At top level, either `static' or no s.c. makes a definition
5778 (perhaps tentative), and absence of `static' makes it public. */
5779 else if (toplevel_bindings_p ())
5781 TREE_PUBLIC (decl) = (declspecs->storage_class != sc_static
5782 && (DECL_THIS_EXTERN (decl) || ! constp));
5783 TREE_STATIC (decl) = ! DECL_EXTERNAL (decl);
5785 /* Not at top level, only `static' makes a static definition. */
5788 TREE_STATIC (decl) = declspecs->storage_class == sc_static;
5789 TREE_PUBLIC (decl) = DECL_EXTERNAL (decl);
5792 if (declspecs->specs[(int)ds_thread])
5794 if (targetm.have_tls)
5795 DECL_THREAD_LOCAL (decl) = 1;
5797 /* A mere warning is sure to result in improper semantics
5798 at runtime. Don't bother to allow this to compile. */
5799 error ("thread-local storage not supported for this target");
5802 if (TREE_PUBLIC (decl))
5804 /* [basic.link]: A name with no linkage (notably, the name of a class
5805 or enumeration declared in a local scope) shall not be used to
5806 declare an entity with linkage.
5808 Only check this for public decls for now. */
5809 tree t = no_linkage_check (TREE_TYPE (decl),
5810 /*relaxed_p=*/false);
5813 if (TYPE_ANONYMOUS_P (t))
5815 if (DECL_EXTERN_C_P (decl))
5816 /* Allow this; it's pretty common in C. */;
5819 pedwarn ("non-local variable `%#D' uses anonymous type",
5821 if (DECL_ORIGINAL_TYPE (TYPE_NAME (t)))
5823 `%#D' does not refer to the unqualified type, so it is not used for linkage",
5828 pedwarn ("non-local variable `%#D' uses local type `%T'",
5836 /* Create and return a canonical pointer to member function type, for
5837 TYPE, which is a POINTER_TYPE to a METHOD_TYPE. */
5840 build_ptrmemfunc_type (tree type)
5844 tree unqualified_variant = NULL_TREE;
5846 if (type == error_mark_node)
5849 /* If a canonical type already exists for this type, use it. We use
5850 this method instead of type_hash_canon, because it only does a
5851 simple equality check on the list of field members. */
5853 if ((t = TYPE_GET_PTRMEMFUNC_TYPE (type)))
5856 /* Make sure that we always have the unqualified pointer-to-member
5858 if (cp_type_quals (type) != TYPE_UNQUALIFIED)
5860 = build_ptrmemfunc_type (TYPE_MAIN_VARIANT (type));
5862 t = make_aggr_type (RECORD_TYPE);
5863 xref_basetypes (t, NULL_TREE);
5865 /* Let the front-end know this is a pointer to member function... */
5866 TYPE_PTRMEMFUNC_FLAG (t) = 1;
5867 /* ... and not really an aggregate. */
5868 SET_IS_AGGR_TYPE (t, 0);
5870 field = build_decl (FIELD_DECL, pfn_identifier, type);
5873 field = build_decl (FIELD_DECL, delta_identifier, delta_type_node);
5874 TREE_CHAIN (field) = fields;
5877 finish_builtin_struct (t, "__ptrmemfunc_type", fields, ptr_type_node);
5879 /* Zap out the name so that the back-end will give us the debugging
5880 information for this anonymous RECORD_TYPE. */
5881 TYPE_NAME (t) = NULL_TREE;
5883 /* If this is not the unqualified form of this pointer-to-member
5884 type, set the TYPE_MAIN_VARIANT for this type to be the
5885 unqualified type. Since they are actually RECORD_TYPEs that are
5886 not variants of each other, we must do this manually. */
5887 if (cp_type_quals (type) != TYPE_UNQUALIFIED)
5889 t = build_qualified_type (t, cp_type_quals (type));
5890 TYPE_MAIN_VARIANT (t) = unqualified_variant;
5891 TYPE_NEXT_VARIANT (t) = TYPE_NEXT_VARIANT (unqualified_variant);
5892 TYPE_NEXT_VARIANT (unqualified_variant) = t;
5895 /* Cache this pointer-to-member type so that we can find it again
5897 TYPE_SET_PTRMEMFUNC_TYPE (type, t);
5902 /* Create and return a pointer to data member type. */
5905 build_ptrmem_type (tree class_type, tree member_type)
5907 if (TREE_CODE (member_type) == METHOD_TYPE)
5911 arg_types = TYPE_ARG_TYPES (member_type);
5912 class_type = (cp_build_qualified_type
5914 cp_type_quals (TREE_TYPE (TREE_VALUE (arg_types)))));
5916 = build_method_type_directly (class_type,
5917 TREE_TYPE (member_type),
5918 TREE_CHAIN (arg_types));
5919 return build_ptrmemfunc_type (build_pointer_type (member_type));
5923 my_friendly_assert (TREE_CODE (member_type) != FUNCTION_TYPE,
5925 return build_offset_type (class_type, member_type);
5929 /* DECL is a VAR_DECL defined in-class, whose TYPE is also given.
5930 Check to see that the definition is valid. Issue appropriate error
5931 messages. Return 1 if the definition is particularly bad, or 0
5935 check_static_variable_definition (tree decl, tree type)
5937 /* Motion 10 at San Diego: If a static const integral data member is
5938 initialized with an integral constant expression, the initializer
5939 may appear either in the declaration (within the class), or in
5940 the definition, but not both. If it appears in the class, the
5941 member is a member constant. The file-scope definition is always
5943 if (!ARITHMETIC_TYPE_P (type) && TREE_CODE (type) != ENUMERAL_TYPE)
5945 error ("invalid in-class initialization of static data member of non-integral type `%T'",
5947 /* If we just return the declaration, crashes will sometimes
5948 occur. We therefore return void_type_node, as if this were a
5949 friend declaration, to cause callers to completely ignore
5950 this declaration. */
5953 else if (!CP_TYPE_CONST_P (type))
5954 error ("ISO C++ forbids in-class initialization of non-const static member `%D'",
5956 else if (pedantic && !INTEGRAL_TYPE_P (type))
5957 pedwarn ("ISO C++ forbids initialization of member constant `%D' of non-integral type `%T'", decl, type);
5962 /* Given the SIZE (i.e., number of elements) in an array, compute an
5963 appropriate index type for the array. If non-NULL, NAME is the
5964 name of the thing being declared. */
5967 compute_array_index_type (tree name, tree size)
5969 tree type = TREE_TYPE (size);
5972 /* The array bound must be an integer type. */
5973 if (!dependent_type_p (type) && !INTEGRAL_TYPE_P (type))
5976 error ("size of array `%D' has non-integral type `%T'", name, type);
5978 error ("size of array has non-integral type `%T'", type);
5979 size = integer_one_node;
5980 type = TREE_TYPE (size);
5983 if (abi_version_at_least (2)
5984 /* We should only handle value dependent expressions specially. */
5985 ? value_dependent_expression_p (size)
5986 /* But for abi-1, we handled all instances in templates. This
5987 effects the manglings produced. */
5988 : processing_template_decl)
5989 return build_index_type (build_min (MINUS_EXPR, sizetype,
5990 size, integer_one_node));
5992 /* The size might be the result of a cast. */
5993 STRIP_TYPE_NOPS (size);
5995 /* It might be a const variable or enumeration constant. */
5996 size = decl_constant_value (size);
5998 /* Normally, the array-bound will be a constant. */
5999 if (TREE_CODE (size) == INTEGER_CST)
6001 /* Check to see if the array bound overflowed. Make that an
6002 error, no matter how generous we're being. */
6003 int old_flag_pedantic_errors = flag_pedantic_errors;
6004 int old_pedantic = pedantic;
6005 pedantic = flag_pedantic_errors = 1;
6006 constant_expression_warning (size);
6007 pedantic = old_pedantic;
6008 flag_pedantic_errors = old_flag_pedantic_errors;
6010 /* An array must have a positive number of elements. */
6011 if (INT_CST_LT (size, integer_zero_node))
6014 error ("size of array `%D' is negative", name);
6016 error ("size of array is negative");
6017 size = integer_one_node;
6019 /* As an extension we allow zero-sized arrays. We always allow
6020 them in system headers because glibc uses them. */
6021 else if (integer_zerop (size) && pedantic && !in_system_header)
6024 pedwarn ("ISO C++ forbids zero-size array `%D'", name);
6026 pedwarn ("ISO C++ forbids zero-size array");
6029 else if (TREE_CONSTANT (size))
6031 /* `(int) &fn' is not a valid array bound. */
6033 error ("size of array `%D' is not an integral constant-expression",
6036 error ("size of array is not an integral constant-expression");
6041 pedwarn ("ISO C++ forbids variable-size array `%D'", name);
6043 pedwarn ("ISO C++ forbids variable-size array");
6046 if (processing_template_decl && !TREE_CONSTANT (size))
6047 /* A variable sized array. */
6048 itype = build_min (MINUS_EXPR, sizetype, size, integer_one_node);
6051 /* Compute the index of the largest element in the array. It is
6052 one less than the number of elements in the array. */
6054 = fold (cp_build_binary_op (MINUS_EXPR,
6055 cp_convert (ssizetype, size),
6056 cp_convert (ssizetype, integer_one_node)));
6057 if (!TREE_CONSTANT (itype))
6058 /* A variable sized array. */
6059 itype = variable_size (itype);
6060 /* Make sure that there was no overflow when creating to a signed
6061 index type. (For example, on a 32-bit machine, an array with
6062 size 2^32 - 1 is too big.) */
6063 else if (TREE_OVERFLOW (itype))
6065 error ("overflow in array dimension");
6066 TREE_OVERFLOW (itype) = 0;
6070 /* Create and return the appropriate index type. */
6071 return build_index_type (itype);
6074 /* Returns the scope (if any) in which the entity declared by
6075 DECLARATOR will be located. If the entity was declared with an
6076 unqualified name, NULL_TREE is returned. */
6079 get_scope_of_declarator (const cp_declarator *declarator)
6081 while (declarator && declarator->kind != cdk_id)
6082 declarator = declarator->declarator;
6084 /* If the declarator-id is a SCOPE_REF, the scope in which the
6085 declaration occurs is the first operand. */
6087 && declarator->u.id.name
6088 && TREE_CODE (declarator->u.id.name) == SCOPE_REF)
6089 return TREE_OPERAND (declarator->u.id.name, 0);
6091 /* Otherwise, the declarator is not a quablified name; the entity will
6092 be declared in the current scope. */
6096 /* Returns an ARRAY_TYPE for an array with SIZE elements of the
6097 indicated TYPE. If non-NULL, NAME is the NAME of the declaration
6101 create_array_type_for_decl (tree name, tree type, tree size)
6103 tree itype = NULL_TREE;
6104 const char* error_msg;
6106 /* If things have already gone awry, bail now. */
6107 if (type == error_mark_node || size == error_mark_node)
6108 return error_mark_node;
6110 /* Assume that everything will go OK. */
6113 /* There are some types which cannot be array elements. */
6114 switch (TREE_CODE (type))
6117 error_msg = "array of void";
6121 error_msg = "array of functions";
6124 case REFERENCE_TYPE:
6125 error_msg = "array of references";
6129 error_msg = "array of function members";
6136 /* If something went wrong, issue an error-message and return. */
6140 error ("declaration of `%D' as %s", name, error_msg);
6142 error ("creating %s", error_msg);
6144 return error_mark_node;
6149 The constant expressions that specify the bounds of the arrays
6150 can be omitted only for the first member of the sequence. */
6151 if (TREE_CODE (type) == ARRAY_TYPE && !TYPE_DOMAIN (type))
6154 error ("declaration of `%D' as multidimensional array must have bounds for all dimensions except the first",
6157 error ("multidimensional array must have bounds for all dimensions except the first");
6159 return error_mark_node;
6162 /* Figure out the index type for the array. */
6164 itype = compute_array_index_type (name, size);
6167 T is called the array element type; this type shall not be [...] an
6168 abstract class type. */
6169 abstract_virtuals_error (name, type);
6171 return build_cplus_array_type (type, itype);
6174 /* Check that it's OK to declare a function with the indicated TYPE.
6175 SFK indicates the kind of special function (if any) that this
6176 function is. OPTYPE is the type given in a conversion operator
6177 declaration, or the class type for a constructor/destructor.
6178 Returns the actual return type of the function; that
6179 may be different than TYPE if an error occurs, or for certain
6180 special functions. */
6183 check_special_function_return_type (special_function_kind sfk,
6189 case sfk_constructor:
6191 error ("return type specification for constructor invalid");
6193 if (targetm.cxx.cdtor_returns_this () && !TYPE_FOR_JAVA (optype))
6194 type = build_pointer_type (optype);
6196 type = void_type_node;
6199 case sfk_destructor:
6201 error ("return type specification for destructor invalid");
6202 /* We can't use the proper return type here because we run into
6203 problems with abiguous bases and covariant returns.
6204 Java classes are left unchanged because (void *) isn't a valid
6205 Java type, and we don't want to change the Java ABI. */
6206 if (targetm.cxx.cdtor_returns_this () && !TYPE_FOR_JAVA (optype))
6207 type = build_pointer_type (void_type_node);
6209 type = void_type_node;
6212 case sfk_conversion:
6213 if (type && !same_type_p (type, optype))
6214 error ("operator `%T' declared to return `%T'", optype, type);
6216 pedwarn ("return type specified for `operator %T'", optype);
6228 /* Given declspecs and a declarator (abstract or otherwise), determine
6229 the name and type of the object declared and construct a DECL node
6232 DECLSPECS is a chain of tree_list nodes whose value fields
6233 are the storage classes and type specifiers.
6235 DECL_CONTEXT says which syntactic context this declaration is in:
6236 NORMAL for most contexts. Make a VAR_DECL or FUNCTION_DECL or TYPE_DECL.
6237 FUNCDEF for a function definition. Like NORMAL but a few different
6238 error messages in each case. Return value may be zero meaning
6239 this definition is too screwy to try to parse.
6240 MEMFUNCDEF for a function definition. Like FUNCDEF but prepares to
6241 handle member functions (which have FIELD context).
6242 Return value may be zero meaning this definition is too screwy to
6244 PARM for a parameter declaration (either within a function prototype
6245 or before a function body). Make a PARM_DECL, or return void_type_node.
6246 CATCHPARM for a parameter declaration before a catch clause.
6247 TYPENAME if for a typename (in a cast or sizeof).
6248 Don't make a DECL node; just return the ..._TYPE node.
6249 FIELD for a struct or union field; make a FIELD_DECL.
6250 BITFIELD for a field with specified width.
6251 INITIALIZED is 1 if the decl has an initializer.
6253 ATTRLIST is a pointer to the list of attributes, which may be NULL
6254 if there are none; *ATTRLIST may be modified if attributes from inside
6255 the declarator should be applied to the declaration.
6257 When this function is called, scoping variables (such as
6258 CURRENT_CLASS_TYPE) should reflect the scope in which the
6259 declaration occurs, not the scope in which the new declaration will
6260 be placed. For example, on:
6264 when grokdeclarator is called for `S::f', the CURRENT_CLASS_TYPE
6265 should not be `S'. */
6268 grokdeclarator (const cp_declarator *declarator,
6269 const cp_decl_specifier_seq *declspecs,
6270 enum decl_context decl_context,
6274 tree type = NULL_TREE;
6277 int virtualp, explicitp, friendp, inlinep, staticp;
6278 int explicit_int = 0;
6279 int explicit_char = 0;
6280 int defaulted_int = 0;
6281 tree dependant_name = NULL_TREE;
6283 tree typedef_decl = NULL_TREE;
6284 const char *name = NULL;
6285 tree typedef_type = NULL_TREE;
6286 int funcdef_flag = 0;
6287 cp_declarator_kind innermost_code = cdk_error;
6290 /* See the code below that used this. */
6291 tree decl_attr = NULL_TREE;
6294 /* Keep track of what sort of function is being processed
6295 so that we can warn about default return values, or explicit
6296 return values which do not match prescribed defaults. */
6297 special_function_kind sfk = sfk_none;
6299 tree dname = NULL_TREE;
6300 tree ctor_return_type = NULL_TREE;
6301 enum overload_flags flags = NO_SPECIAL;
6302 cp_cv_quals quals = TYPE_UNQUALIFIED;
6303 tree raises = NULL_TREE;
6304 int template_count = 0;
6305 tree returned_attrs = NULL_TREE;
6306 tree parms = NULL_TREE;
6307 const cp_declarator *id_declarator;
6308 /* The unqualified name of the declarator; either an
6309 IDENTIFIER_NODE, BIT_NOT_EXPR, or TEMPLATE_ID_EXPR. */
6310 tree unqualified_id;
6311 /* The class type, if any, in which this entity is located,
6312 or NULL_TREE if none. Note that this value may be different from
6313 the current class type; for example if an attempt is made to declare
6314 "A::f" inside "B", this value will be "A". */
6315 tree ctype = current_class_type;
6316 /* The NAMESPACE_DECL for the namespace in which this entity is
6317 located. If an unqualified name is used to declare the entity,
6318 this value will be NULL_TREE, even if the entity is located at
6320 tree in_namespace = NULL_TREE;
6322 cp_storage_class storage_class;
6323 bool unsigned_p, signed_p, short_p, long_p, thread_p;
6325 signed_p = declspecs->specs[(int)ds_signed];
6326 unsigned_p = declspecs->specs[(int)ds_unsigned];
6327 short_p = declspecs->specs[(int)ds_short];
6328 long_p = declspecs->specs[(int)ds_long];
6329 thread_p = declspecs->specs[(int)ds_thread];
6331 if (decl_context == FUNCDEF)
6332 funcdef_flag = 1, decl_context = NORMAL;
6333 else if (decl_context == MEMFUNCDEF)
6334 funcdef_flag = -1, decl_context = FIELD;
6335 else if (decl_context == BITFIELD)
6336 bitfield = 1, decl_context = FIELD;
6338 /* Look inside a declarator for the name being declared
6339 and get it as a string, for an error message. */
6340 for (id_declarator = declarator;
6342 id_declarator = id_declarator->declarator)
6344 if (id_declarator->kind != cdk_id)
6345 innermost_code = id_declarator->kind;
6347 switch (id_declarator->kind)
6350 if (id_declarator->declarator
6351 && id_declarator->declarator->kind == cdk_id)
6353 sfk = id_declarator->declarator->u.id.sfk;
6354 if (sfk == sfk_destructor)
6361 tree decl = id_declarator->u.id.name;
6364 if (TREE_CODE (decl) == SCOPE_REF)
6366 tree qualifying_scope = TREE_OPERAND (decl, 0);
6368 /* It is valid to write:
6370 class C { void f(); };
6374 The standard is not clear about whether `typedef const C D' is
6375 legal; as of 2002-09-15 the committee is considering
6376 that question. EDG 3.0 allows that syntax.
6377 Therefore, we do as well. */
6378 if (qualifying_scope && TYPE_P (qualifying_scope))
6380 ctype = TYPE_MAIN_VARIANT (qualifying_scope);
6381 if (innermost_code != cdk_function
6382 && current_class_type
6383 && !UNIQUELY_DERIVED_FROM_P (ctype,
6384 current_class_type))
6386 error ("type `%T' is not derived from type `%T'",
6387 ctype, current_class_type);
6390 TREE_OPERAND (decl, 0) = ctype;
6392 else if (TREE_CODE (qualifying_scope) == NAMESPACE_DECL)
6393 in_namespace = qualifying_scope;
6394 decl = TREE_OPERAND (decl, 1);
6396 if (TREE_CODE (decl) == BASELINK)
6397 decl = BASELINK_FUNCTIONS (decl);
6398 if (decl == error_mark_node)
6399 return error_mark_node;
6400 switch (TREE_CODE (decl))
6404 tree type = TREE_OPERAND (decl, 0);
6405 type = constructor_name (type);
6406 name = IDENTIFIER_POINTER (type);
6410 case TEMPLATE_ID_EXPR:
6412 tree fns = TREE_OPERAND (decl, 0);
6415 if (TREE_CODE (dname) == COMPONENT_REF)
6416 dname = TREE_OPERAND (dname, 1);
6417 if (TREE_CODE (dname) != IDENTIFIER_NODE)
6419 my_friendly_assert (is_overloaded_fn (dname),
6421 dname = DECL_NAME (get_first_fn (dname));
6426 case IDENTIFIER_NODE:
6427 if (TREE_CODE (decl) == IDENTIFIER_NODE)
6430 if (C_IS_RESERVED_WORD (dname))
6432 error ("declarator-id missing; using reserved word `%D'",
6434 name = IDENTIFIER_POINTER (dname);
6436 else if (!IDENTIFIER_TYPENAME_P (dname))
6437 name = IDENTIFIER_POINTER (dname);
6440 my_friendly_assert (flags == NO_SPECIAL, 154);
6441 flags = TYPENAME_FLAG;
6442 ctor_return_type = TREE_TYPE (dname);
6443 sfk = sfk_conversion;
6444 if (is_typename_at_global_scope (dname))
6445 name = IDENTIFIER_POINTER (dname);
6447 name = "<invalid operator>";
6452 dname = constructor_name (TREE_TYPE (decl));
6453 name = IDENTIFIER_POINTER (dname);
6474 if (id_declarator->kind == cdk_id)
6478 /* A function definition's declarator must have the form of
6479 a function declarator. */
6481 if (funcdef_flag && innermost_code != cdk_function)
6484 if (((dname && IDENTIFIER_OPNAME_P (dname)) || flags == TYPENAME_FLAG)
6485 && innermost_code != cdk_function
6486 && ! (ctype && !declspecs->any_specifiers_p))
6488 error ("declaration of `%D' as non-function", dname);
6489 return void_type_node;
6492 /* Anything declared one level down from the top level
6493 must be one of the parameters of a function
6494 (because the body is at least two levels down). */
6496 /* This heuristic cannot be applied to C++ nodes! Fixed, however,
6497 by not allowing C++ class definitions to specify their parameters
6498 with xdecls (must be spec.d in the parmlist).
6500 Since we now wait to push a class scope until we are sure that
6501 we are in a legitimate method context, we must set oldcname
6502 explicitly (since current_class_name is not yet alive).
6504 We also want to avoid calling this a PARM if it is in a namespace. */
6506 if (decl_context == NORMAL && !toplevel_bindings_p ())
6508 struct cp_binding_level *b = current_binding_level;
6509 current_binding_level = b->level_chain;
6510 if (current_binding_level != 0 && toplevel_bindings_p ())
6511 decl_context = PARM;
6512 current_binding_level = b;
6516 name = decl_context == PARM ? "parameter" : "type name";
6518 /* If there were multiple types specified in the decl-specifier-seq,
6519 issue an error message. */
6520 if (declspecs->multiple_types_p)
6521 error ("two or more data types in declaration of `%s'", name);
6522 /* Extract the basic type from the decl-specifier-seq. */
6523 type = declspecs->type;
6524 if (type == error_mark_node)
6526 /* If the entire declaration is itself tagged as deprecated then
6527 suppress reports of deprecated items. */
6528 if (type && TREE_DEPRECATED (type)
6529 && deprecated_state != DEPRECATED_SUPPRESS)
6530 warn_deprecated_use (type);
6531 if (type && TREE_CODE (type) == TYPE_DECL)
6533 typedef_decl = type;
6534 type = TREE_TYPE (typedef_decl);
6536 /* No type at all: default to `int', and set DEFAULTED_INT
6537 because it was not a user-defined typedef. */
6538 if (type == NULL_TREE && (signed_p || unsigned_p || long_p || short_p))
6540 /* These imply 'int'. */
6541 type = integer_type_node;
6545 explicit_int = declspecs->explicit_int_p;
6546 explicit_char = declspecs->explicit_char_p;
6548 /* Check for repeated decl-specifiers. */
6549 for (ds = ds_first; ds != ds_last; ++ds)
6551 unsigned count = declspecs->specs[(int)ds];
6554 /* The "long" specifier is a special case because of
6559 error ("`long long long' is too long for GCC");
6560 else if (pedantic && !in_system_header && warn_long_long)
6561 pedwarn ("ISO C++ does not support `long long'");
6565 else if (declspecs->specs[(int)ds] > 1)
6567 static const char *const decl_spec_names[] = {
6583 error ("duplicate `%s'", decl_spec_names[(int)ds]);
6588 /* See the code below that used this. */
6590 decl_attr = DECL_ATTRIBUTES (typedef_decl);
6592 typedef_type = type;
6595 if (sfk != sfk_conversion)
6596 ctor_return_type = ctype;
6598 if (sfk != sfk_none)
6599 type = check_special_function_return_type (sfk, type,
6601 else if (type == NULL_TREE)
6607 /* We handle `main' specially here, because 'main () { }' is so
6608 common. With no options, it is allowed. With -Wreturn-type,
6609 it is a warning. It is only an error with -pedantic-errors. */
6610 is_main = (funcdef_flag
6611 && dname && MAIN_NAME_P (dname)
6612 && ctype == NULL_TREE
6613 && in_namespace == NULL_TREE
6614 && current_namespace == global_namespace);
6616 if (in_system_header || flag_ms_extensions)
6617 /* Allow it, sigh. */;
6618 else if (pedantic || ! is_main)
6619 pedwarn ("ISO C++ forbids declaration of `%s' with no type",
6621 else if (warn_return_type)
6622 warning ("ISO C++ forbids declaration of `%s' with no type",
6625 type = integer_type_node;
6630 /* Now process the modifiers that were specified
6631 and check for invalid combinations. */
6633 /* Long double is a special combination. */
6634 if (long_p && TYPE_MAIN_VARIANT (type) == double_type_node)
6637 type = build_qualified_type (long_double_type_node,
6638 cp_type_quals (type));
6641 /* Check all other uses of type modifiers. */
6643 if (unsigned_p || signed_p || long_p || short_p)
6647 if (TREE_CODE (type) == REAL_TYPE)
6648 error ("short, signed or unsigned invalid for `%s'", name);
6649 else if (TREE_CODE (type) != INTEGER_TYPE)
6650 error ("long, short, signed or unsigned invalid for `%s'", name);
6651 else if (long_p && short_p)
6652 error ("long and short specified together for `%s'", name);
6653 else if ((long_p || short_p) && explicit_char)
6654 error ("long or short specified with char for `%s'", name);
6655 else if ((long_p|| short_p) && TREE_CODE (type) == REAL_TYPE)
6656 error ("long or short specified with floating type for `%s'", name);
6657 else if (signed_p && unsigned_p)
6658 error ("signed and unsigned given together for `%s'", name);
6662 if (!explicit_int && !defaulted_int && !explicit_char && pedantic)
6664 pedwarn ("long, short, signed or unsigned used invalidly for `%s'",
6666 if (flag_pedantic_errors)
6671 /* Discard the type modifiers if they are invalid. */
6682 /* Decide whether an integer type is signed or not.
6683 Optionally treat bitfields as signed by default. */
6687 It is implementation-defined whether a plain (neither
6688 explicitly signed or unsigned) char, short, int, or long
6689 bit-field is signed or unsigned.
6691 Naturally, we extend this to long long as well. Note that
6692 this does not include wchar_t. */
6693 || (bitfield && !flag_signed_bitfields
6695 /* A typedef for plain `int' without `signed' can be
6696 controlled just like plain `int', but a typedef for
6697 `signed int' cannot be so controlled. */
6699 && C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl))
6700 && (TREE_CODE (type) == INTEGER_TYPE
6701 || TREE_CODE (type) == CHAR_TYPE)
6702 && !same_type_p (TYPE_MAIN_VARIANT (type), wchar_type_node)))
6705 type = long_long_unsigned_type_node;
6707 type = long_unsigned_type_node;
6709 type = short_unsigned_type_node;
6710 else if (type == char_type_node)
6711 type = unsigned_char_type_node;
6712 else if (typedef_decl)
6713 type = c_common_unsigned_type (type);
6715 type = unsigned_type_node;
6717 else if (signed_p && type == char_type_node)
6718 type = signed_char_type_node;
6720 type = long_long_integer_type_node;
6722 type = long_integer_type_node;
6724 type = short_integer_type_node;
6726 if (declspecs->specs[(int)ds_complex])
6728 if (TREE_CODE (type) != INTEGER_TYPE && TREE_CODE (type) != REAL_TYPE)
6729 error ("complex invalid for `%s'", name);
6730 /* If we just have "complex", it is equivalent to
6731 "complex double", but if any modifiers at all are specified it is
6732 the complex form of TYPE. E.g, "complex short" is
6733 "complex short int". */
6735 else if (defaulted_int && ! longlong
6736 && ! (long_p || short_p || signed_p || unsigned_p))
6737 type = complex_double_type_node;
6738 else if (type == integer_type_node)
6739 type = complex_integer_type_node;
6740 else if (type == float_type_node)
6741 type = complex_float_type_node;
6742 else if (type == double_type_node)
6743 type = complex_double_type_node;
6744 else if (type == long_double_type_node)
6745 type = complex_long_double_type_node;
6747 type = build_complex_type (type);
6750 type_quals = TYPE_UNQUALIFIED;
6751 if (declspecs->specs[(int)ds_const])
6752 type_quals |= TYPE_QUAL_CONST;
6753 if (declspecs->specs[(int)ds_volatile])
6754 type_quals |= TYPE_QUAL_VOLATILE;
6755 if (declspecs->specs[(int)ds_restrict])
6756 type_quals |= TYPE_QUAL_RESTRICT;
6757 if (sfk == sfk_conversion && type_quals != TYPE_UNQUALIFIED)
6758 error ("qualifiers are not allowed on declaration of `operator %T'",
6761 type_quals |= cp_type_quals (type);
6762 type = cp_build_qualified_type_real
6763 (type, type_quals, ((typedef_decl && !DECL_ARTIFICIAL (typedef_decl)
6764 ? tf_ignore_bad_quals : 0) | tf_error | tf_warning));
6765 /* We might have ignored or rejected some of the qualifiers. */
6766 type_quals = cp_type_quals (type);
6769 inlinep = !! declspecs->specs[(int)ds_inline];
6770 virtualp = !! declspecs->specs[(int)ds_virtual];
6771 explicitp = !! declspecs->specs[(int)ds_explicit];
6773 storage_class = declspecs->storage_class;
6774 if (storage_class == sc_static)
6775 staticp = 1 + (decl_context == FIELD);
6777 if (virtualp && staticp == 2)
6779 error ("member `%D' cannot be declared both virtual and static",
6783 friendp = !! declspecs->specs[(int)ds_friend];
6785 if (dependant_name && !friendp)
6787 error ("`%T::%D' is not a valid declarator", ctype, dependant_name);
6788 return void_type_node;
6791 /* Issue errors about use of storage classes for parameters. */
6792 if (decl_context == PARM)
6794 if (declspecs->specs[(int)ds_typedef])
6795 error ("typedef declaration invalid in parameter declaration");
6796 else if (storage_class == sc_static
6797 || storage_class == sc_extern
6799 error ("storage class specifiers invalid in parameter declarations");
6802 /* Give error if `virtual' is used outside of class declaration. */
6804 && (current_class_name == NULL_TREE || decl_context != FIELD))
6806 error ("virtual outside class declaration");
6810 /* Static anonymous unions are dealt with here. */
6811 if (staticp && decl_context == TYPENAME
6813 && ANON_AGGR_TYPE_P (declspecs->type))
6814 decl_context = FIELD;
6816 /* Warn about storage classes that are invalid for certain
6817 kinds of declarations (parameters, typenames, etc.). */
6818 if (declspecs->multiple_storage_classes_p)
6819 error ("multiple storage classes in declaration of `%s'", name);
6822 && storage_class != sc_extern
6823 && storage_class != sc_static)
6824 || declspecs->specs[(int)ds_typedef]))
6826 error ("multiple storage classes in declaration of `%s'", name);
6829 else if (decl_context != NORMAL
6830 && ((storage_class != sc_none
6831 && storage_class != sc_mutable)
6834 if ((decl_context == PARM || decl_context == CATCHPARM)
6835 && (storage_class == sc_register
6836 || storage_class == sc_auto))
6838 else if (declspecs->specs[(int)ds_typedef])
6840 else if (decl_context == FIELD
6841 /* C++ allows static class elements. */
6842 && storage_class == sc_static)
6843 /* C++ also allows inlines and signed and unsigned elements,
6844 but in those cases we don't come in here. */
6848 if (decl_context == FIELD)
6850 tree tmp = NULL_TREE;
6855 /* Avoid trying to get an operand off an identifier node. */
6856 if (declarator->kind != cdk_id)
6857 tmp = declarator->declarator->u.id.name;
6859 tmp = declarator->u.id.name;
6860 op = IDENTIFIER_OPNAME_P (tmp);
6861 if (IDENTIFIER_TYPENAME_P (tmp))
6863 if (is_typename_at_global_scope (tmp))
6864 name = IDENTIFIER_POINTER (tmp);
6866 name = "<invalid operator>";
6869 error ("storage class specified for %s `%s'",
6870 op ? "member operator" : "field",
6875 if (decl_context == PARM || decl_context == CATCHPARM)
6876 error ("storage class specified for parameter `%s'", name);
6878 error ("storage class specified for typename");
6880 if (storage_class == sc_register
6881 || storage_class == sc_auto
6882 || storage_class == sc_extern
6884 storage_class = sc_none;
6887 else if (storage_class == sc_extern && initialized
6890 if (toplevel_bindings_p ())
6892 /* It's common practice (and completely valid) to have a const
6893 be initialized and declared extern. */
6894 if (!(type_quals & TYPE_QUAL_CONST))
6895 warning ("`%s' initialized and declared `extern'", name);
6898 error ("`%s' has both `extern' and initializer", name);
6900 else if (storage_class == sc_extern && funcdef_flag
6901 && ! toplevel_bindings_p ())
6902 error ("nested function `%s' declared `extern'", name);
6903 else if (toplevel_bindings_p ())
6905 if (storage_class == sc_auto)
6906 error ("top-level declaration of `%s' specifies `auto'", name);
6909 && storage_class != sc_extern
6910 && storage_class != sc_static)
6912 error ("function-scope `%s' implicitly auto and declared `__thread'",
6917 if (storage_class && friendp)
6918 error ("storage class specifiers invalid in friend function declarations");
6921 unqualified_id = NULL_TREE;
6924 unqualified_id = id_declarator->u.id.name;
6925 if (TREE_CODE (unqualified_id) == SCOPE_REF)
6926 unqualified_id = TREE_OPERAND (unqualified_id, 1);
6927 if (TREE_CODE (unqualified_id) == BASELINK)
6928 unqualified_id = BASELINK_FUNCTIONS (unqualified_id);
6929 switch (TREE_CODE (unqualified_id))
6933 = constructor_name (TREE_OPERAND (unqualified_id, 0));
6938 = constructor_name (TREE_TYPE (unqualified_id));
6941 case IDENTIFIER_NODE:
6942 case TEMPLATE_ID_EXPR:
6950 /* Determine the type of the entity declared by recurring on the
6953 declarator && declarator->kind != cdk_id;
6954 declarator = declarator->declarator)
6956 const cp_declarator *inner_declarator;
6959 if (type == error_mark_node)
6960 return error_mark_node;
6962 inner_declarator = declarator->declarator;
6964 attrs = declarator->attributes;
6970 if (declarator == NULL || declarator->kind == cdk_id)
6971 attr_flags |= (int) ATTR_FLAG_DECL_NEXT;
6972 if (declarator->kind == cdk_function)
6973 attr_flags |= (int) ATTR_FLAG_FUNCTION_NEXT;
6974 if (declarator->kind == cdk_array)
6975 attr_flags |= (int) ATTR_FLAG_ARRAY_NEXT;
6976 returned_attrs = decl_attributes (&type,
6977 chainon (returned_attrs, attrs),
6981 switch (declarator->kind)
6984 type = create_array_type_for_decl (dname, type,
6985 declarator->u.array.bounds);
6986 if (inner_declarator
6987 && (inner_declarator->kind == cdk_pointer
6988 || inner_declarator->kind == cdk_reference
6989 || inner_declarator->kind == cdk_ptrmem))
6990 /* We can never complete an array type which is the
6991 target of a pointer, so go ahead and lay it out. */
7000 /* Declaring a function type.
7001 Make sure we have a valid type for the function to return. */
7003 /* We now know that the TYPE_QUALS don't apply to the
7004 decl, but to its return type. */
7005 type_quals = TYPE_UNQUALIFIED;
7007 /* Warn about some types functions can't return. */
7009 if (TREE_CODE (type) == FUNCTION_TYPE)
7011 error ("`%s' declared as function returning a function", name);
7012 type = integer_type_node;
7014 if (TREE_CODE (type) == ARRAY_TYPE)
7016 error ("`%s' declared as function returning an array", name);
7017 type = integer_type_node;
7020 /* Pick up type qualifiers which should be applied to `this'. */
7021 quals = declarator->u.function.qualifiers;
7023 /* Pick up the exception specifications. */
7024 raises = declarator->u.function.exception_specification;
7026 /* Say it's a definition only for the CALL_EXPR
7027 closest to the identifier. */
7028 funcdecl_p = inner_declarator && inner_declarator->kind == cdk_id;
7030 if (ctype == NULL_TREE
7031 && decl_context == FIELD
7033 && (friendp == 0 || dname == current_class_name))
7034 ctype = current_class_type;
7036 if (ctype && sfk == sfk_conversion)
7037 TYPE_HAS_CONVERSION (ctype) = 1;
7038 if (ctype && (sfk == sfk_constructor
7039 || sfk == sfk_destructor))
7041 /* We are within a class's scope. If our declarator name
7042 is the same as the class name, and we are defining
7043 a function, then it is a constructor/destructor, and
7044 therefore returns a void type. */
7046 if (flags == DTOR_FLAG)
7048 /* ISO C++ 12.4/2. A destructor may not be
7049 declared const or volatile. A destructor may
7052 error ("destructor cannot be static member function");
7055 error ("destructors may not be cv-qualified");
7056 quals = TYPE_UNQUALIFIED;
7058 if (decl_context == FIELD)
7060 if (! member_function_or_else (ctype,
7063 return void_type_node;
7066 else /* It's a constructor. */
7070 /* ISO C++ 12.1. A constructor may not be
7071 declared const or volatile. A constructor may
7072 not be virtual. A constructor may not be
7075 error ("constructor cannot be static member function");
7078 pedwarn ("constructors cannot be declared virtual");
7083 error ("constructors may not be cv-qualified");
7084 quals = TYPE_UNQUALIFIED;
7086 if (decl_context == FIELD)
7088 if (! member_function_or_else (ctype,
7091 return void_type_node;
7092 TYPE_HAS_CONSTRUCTOR (ctype) = 1;
7093 if (sfk != sfk_constructor)
7097 if (decl_context == FIELD)
7103 error ("can't initialize friend function `%s'", name);
7106 /* Cannot be both friend and virtual. */
7107 error ("virtual functions cannot be friends");
7110 if (decl_context == NORMAL)
7111 error ("friend declaration not in class definition");
7112 if (current_function_decl && funcdef_flag)
7113 error ("can't define friend function `%s' in a local class definition",
7117 arg_types = grokparms (declarator->u.function.parameters,
7120 if (inner_declarator
7121 && inner_declarator->kind == cdk_id
7122 && inner_declarator->u.id.sfk == sfk_destructor
7123 && arg_types != void_list_node)
7125 error ("destructors may not have parameters");
7126 arg_types = void_list_node;
7130 type = build_function_type (type, arg_types);
7137 /* Filter out pointers-to-references and references-to-references.
7138 We can get these if a TYPE_DECL is used. */
7140 if (TREE_CODE (type) == REFERENCE_TYPE)
7142 error (declarator->kind == cdk_reference
7143 ? "cannot declare reference to `%#T'"
7144 : "cannot declare pointer to `%#T'", type);
7145 type = TREE_TYPE (type);
7147 else if (VOID_TYPE_P (type))
7149 if (declarator->kind == cdk_reference)
7150 error ("cannot declare reference to `%#T'", type);
7151 else if (declarator->kind == cdk_ptrmem)
7152 error ("cannot declare pointer to `%#T' member", type);
7155 /* We now know that the TYPE_QUALS don't apply to the decl,
7156 but to the target of the pointer. */
7157 type_quals = TYPE_UNQUALIFIED;
7159 if (declarator->kind == cdk_ptrmem
7160 && (TREE_CODE (type) == FUNCTION_TYPE
7161 || (quals && TREE_CODE (type) == METHOD_TYPE)))
7163 tree dummy = build_decl (TYPE_DECL, NULL_TREE, type);
7164 grok_method_quals (declarator->u.pointer.class_type,
7166 type = TREE_TYPE (dummy);
7167 quals = TYPE_UNQUALIFIED;
7170 if (declarator->kind == cdk_reference)
7172 if (!VOID_TYPE_P (type))
7173 type = build_reference_type (type);
7175 else if (TREE_CODE (type) == METHOD_TYPE)
7176 type = build_ptrmemfunc_type (build_pointer_type (type));
7177 else if (declarator->kind == cdk_ptrmem)
7178 type = build_ptrmem_type (declarator->u.pointer.class_type,
7181 type = build_pointer_type (type);
7183 /* Process a list of type modifier keywords (such as
7184 const or volatile) that were given inside the `*' or `&'. */
7186 if (declarator->u.pointer.qualifiers)
7189 = cp_build_qualified_type (type,
7190 declarator->u.pointer.qualifiers);
7191 type_quals = cp_type_quals (type);
7204 if (unqualified_id && TREE_CODE (unqualified_id) == TEMPLATE_ID_EXPR
7205 && TREE_CODE (type) != FUNCTION_TYPE
7206 && TREE_CODE (type) != METHOD_TYPE)
7208 error ("template-id `%D' used as a declarator",
7210 unqualified_id = dname;
7213 /* If DECLARATOR is non-NULL, we know it is a cdk_id declarator;
7214 otherwise, we would not have exited the loop above. */
7216 && TREE_CODE (declarator->u.id.name) == SCOPE_REF
7217 /* If the qualifying scope was invalid, it will have been set to
7219 && TREE_OPERAND (declarator->u.id.name, 0)
7220 && TYPE_P (TREE_OPERAND (declarator->u.id.name, 0)))
7224 ctype = TREE_OPERAND (declarator->u.id.name, 0);
7226 ctype = TYPE_MAIN_VARIANT (ctype);
7228 while (t != NULL_TREE && CLASS_TYPE_P (t))
7230 /* You're supposed to have one `template <...>' for every
7231 template class, but you don't need one for a full
7232 specialization. For example:
7234 template <class T> struct S{};
7235 template <> struct S<int> { void f(); };
7236 void S<int>::f () {}
7238 is correct; there shouldn't be a `template <>' for the
7239 definition of `S<int>::f'. */
7240 if (CLASSTYPE_TEMPLATE_INFO (t)
7241 && (CLASSTYPE_TEMPLATE_INSTANTIATION (t)
7242 || uses_template_parms (CLASSTYPE_TI_ARGS (t)))
7243 && PRIMARY_TEMPLATE_P (CLASSTYPE_TI_TEMPLATE (t)))
7244 template_count += 1;
7246 t = TYPE_MAIN_DECL (t);
7247 t = DECL_CONTEXT (t);
7250 if (ctype == current_class_type)
7256 Is this ill-formed? */
7259 pedwarn ("extra qualification `%T::' on member `%s' ignored",
7262 else if (TREE_CODE (type) == FUNCTION_TYPE)
7264 tree sname = TREE_OPERAND (declarator->u.id.name, 1);
7266 if (TREE_CODE (sname) == IDENTIFIER_NODE
7267 && NEW_DELETE_OPNAME_P (sname))
7268 /* Overloaded operator new and operator delete
7269 are always static functions. */
7271 else if (current_class_type == NULL_TREE || friendp)
7273 = build_method_type_directly (ctype,
7275 TYPE_ARG_TYPES (type));
7278 error ("cannot declare member function `%T::%s' within `%T'",
7279 ctype, name, current_class_type);
7280 return error_mark_node;
7283 else if (declspecs->specs[(int)ds_typedef]
7284 || COMPLETE_TYPE_P (complete_type (ctype)))
7286 /* Have to move this code elsewhere in this function.
7287 this code is used for i.e., typedef int A::M; M *pm;
7289 It is? How? jason 10/2/94 */
7291 if (current_class_type)
7293 error ("cannot declare member `%T::%s' within `%T'",
7294 ctype, name, current_class_type);
7295 return void_type_node;
7300 cxx_incomplete_type_error (NULL_TREE, ctype);
7301 return error_mark_node;
7308 *attrlist = chainon (returned_attrs, *attrlist);
7310 attrlist = &returned_attrs;
7313 /* Now TYPE has the actual type. */
7315 /* Did array size calculations overflow? */
7317 if (TREE_CODE (type) == ARRAY_TYPE
7318 && COMPLETE_TYPE_P (type)
7319 && TREE_OVERFLOW (TYPE_SIZE (type)))
7321 error ("size of array `%s' is too large", name);
7322 /* If we proceed with the array type as it is, we'll eventually
7323 crash in tree_low_cst(). */
7324 type = error_mark_node;
7327 if ((decl_context == FIELD || decl_context == PARM)
7328 && !processing_template_decl
7329 && variably_modified_type_p (type, NULL_TREE))
7331 if (decl_context == FIELD)
7332 error ("data member may not have variably modified type `%T'", type);
7334 error ("parameter may not have variably modified type `%T'", type);
7335 type = error_mark_node;
7338 if (explicitp == 1 || (explicitp && friendp))
7340 /* [dcl.fct.spec] The explicit specifier shall only be used in
7341 declarations of constructors within a class definition. */
7342 error ("only declarations of constructors can be `explicit'");
7346 if (storage_class == sc_mutable)
7348 if (decl_context != FIELD || friendp)
7350 error ("non-member `%s' cannot be declared `mutable'", name);
7351 storage_class = sc_none;
7353 else if (decl_context == TYPENAME || declspecs->specs[(int)ds_typedef])
7355 error ("non-object member `%s' cannot be declared `mutable'", name);
7356 storage_class = sc_none;
7358 else if (TREE_CODE (type) == FUNCTION_TYPE
7359 || TREE_CODE (type) == METHOD_TYPE)
7361 error ("function `%s' cannot be declared `mutable'", name);
7362 storage_class = sc_none;
7366 error ("static `%s' cannot be declared `mutable'", name);
7367 storage_class = sc_none;
7369 else if (type_quals & TYPE_QUAL_CONST)
7371 error ("const `%s' cannot be declared `mutable'", name);
7372 storage_class = sc_none;
7376 /* If this is declaring a typedef name, return a TYPE_DECL. */
7377 if (declspecs->specs[(int)ds_typedef] && decl_context != TYPENAME)
7381 /* Note that the grammar rejects storage classes
7382 in typenames, fields or parameters. */
7383 if (current_lang_name == lang_name_java)
7384 TYPE_FOR_JAVA (type) = 1;
7386 if (decl_context == FIELD)
7388 if (constructor_name_p (unqualified_id, current_class_type))
7389 pedwarn ("ISO C++ forbids nested type `%D' with same name as enclosing class",
7391 decl = build_lang_decl (TYPE_DECL, unqualified_id, type);
7395 decl = build_decl (TYPE_DECL, unqualified_id, type);
7396 if (in_namespace || ctype)
7397 error ("%Jtypedef name may not be a nested-name-specifier", decl);
7398 if (!current_function_decl)
7399 DECL_CONTEXT (decl) = FROB_CONTEXT (current_namespace);
7402 /* If the user declares "typedef struct {...} foo" then the
7403 struct will have an anonymous name. Fill that name in now.
7404 Nothing can refer to it, so nothing needs know about the name
7406 if (type != error_mark_node
7409 && TREE_CODE (TYPE_NAME (type)) == TYPE_DECL
7410 && TYPE_ANONYMOUS_P (type)
7411 /* Don't do this if there are attributes. */
7412 && (!attrlist || !*attrlist)
7413 && cp_type_quals (type) == TYPE_UNQUALIFIED)
7415 tree oldname = TYPE_NAME (type);
7418 /* Replace the anonymous name with the real name everywhere. */
7419 lookup_tag_reverse (type, unqualified_id);
7420 for (t = TYPE_MAIN_VARIANT (type); t; t = TYPE_NEXT_VARIANT (t))
7421 if (TYPE_NAME (t) == oldname)
7422 TYPE_NAME (t) = decl;
7424 if (TYPE_LANG_SPECIFIC (type))
7425 TYPE_WAS_ANONYMOUS (type) = 1;
7427 /* If this is a typedef within a template class, the nested
7428 type is a (non-primary) template. The name for the
7429 template needs updating as well. */
7430 if (TYPE_LANG_SPECIFIC (type) && CLASSTYPE_TEMPLATE_INFO (type))
7431 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type))
7432 = TYPE_IDENTIFIER (type);
7434 /* FIXME remangle member functions; member functions of a
7435 type with external linkage have external linkage. */
7440 if (ctype == NULL_TREE)
7442 if (TREE_CODE (type) != METHOD_TYPE)
7443 error ("%Jinvalid type qualifier for non-member function type",
7446 ctype = TYPE_METHOD_BASETYPE (type);
7448 if (ctype != NULL_TREE)
7449 grok_method_quals (ctype, decl, quals);
7453 || (typedef_decl && C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl)))
7454 C_TYPEDEF_EXPLICITLY_SIGNED (decl) = 1;
7456 bad_specifiers (decl, "type", virtualp, quals != TYPE_UNQUALIFIED,
7457 inlinep, friendp, raises != NULL_TREE);
7462 /* Detect the case of an array type of unspecified size
7463 which came, as such, direct from a typedef name.
7464 We must copy the type, so that the array's domain can be
7465 individually set by the object's initializer. */
7467 if (type && typedef_type
7468 && TREE_CODE (type) == ARRAY_TYPE && !TYPE_DOMAIN (type)
7469 && TYPE_MAIN_VARIANT (type) == TYPE_MAIN_VARIANT (typedef_type))
7470 type = build_cplus_array_type (TREE_TYPE (type), NULL_TREE);
7472 /* Detect where we're using a typedef of function type to declare a
7473 function. PARMS will not be set, so we must create it now. */
7475 if (type == typedef_type && TREE_CODE (type) == FUNCTION_TYPE)
7477 tree decls = NULL_TREE;
7480 for (args = TYPE_ARG_TYPES (type); args; args = TREE_CHAIN (args))
7482 tree decl = cp_build_parm_decl (NULL_TREE, TREE_VALUE (args));
7484 TREE_CHAIN (decl) = decls;
7488 parms = nreverse (decls);
7491 /* If this is a type name (such as, in a cast or sizeof),
7492 compute the type and return it now. */
7494 if (decl_context == TYPENAME)
7496 /* Note that the grammar rejects storage classes
7497 in typenames, fields or parameters. */
7498 if (type_quals != TYPE_UNQUALIFIED)
7499 type_quals = TYPE_UNQUALIFIED;
7501 /* Special case: "friend class foo" looks like a TYPENAME context. */
7504 if (type_quals != TYPE_UNQUALIFIED)
7506 error ("type qualifiers specified for friend class declaration");
7507 type_quals = TYPE_UNQUALIFIED;
7511 error ("`inline' specified for friend class declaration");
7517 /* Don't allow friend declaration without a class-key. */
7518 if (TREE_CODE (type) == TEMPLATE_TYPE_PARM)
7519 pedwarn ("template parameters cannot be friends");
7520 else if (TREE_CODE (type) == TYPENAME_TYPE)
7521 pedwarn ("friend declaration requires class-key, "
7522 "i.e. `friend class %T::%D'",
7523 TYPE_CONTEXT (type), TYPENAME_TYPE_FULLNAME (type));
7525 pedwarn ("friend declaration requires class-key, "
7526 "i.e. `friend %#T'",
7530 /* Only try to do this stuff if we didn't already give up. */
7531 if (type != integer_type_node)
7533 /* A friendly class? */
7534 if (current_class_type)
7535 make_friend_class (current_class_type, TYPE_MAIN_VARIANT (type),
7538 error ("trying to make class `%T' a friend of global scope",
7541 type = void_type_node;
7546 if (ctype == NULL_TREE)
7548 if (TREE_CODE (type) != METHOD_TYPE)
7549 error ("invalid qualifiers on non-member function type");
7551 ctype = TYPE_METHOD_BASETYPE (type);
7555 tree dummy = build_decl (TYPE_DECL, unqualified_id, type);
7556 grok_method_quals (ctype, dummy, quals);
7557 type = TREE_TYPE (dummy);
7563 else if (unqualified_id == NULL_TREE && decl_context != PARM
7564 && decl_context != CATCHPARM
7565 && TREE_CODE (type) != UNION_TYPE
7568 error ("abstract declarator `%T' used as declaration", type);
7569 unqualified_id = make_anon_name ();
7572 /* `void' at top level (not within pointer)
7573 is allowed only in typedefs or type names.
7574 We don't complain about parms either, but that is because
7575 a better error message can be made later. */
7577 if (TREE_CODE (type) == VOID_TYPE && decl_context != PARM)
7579 if (! unqualified_id)
7580 error ("unnamed variable or field declared void");
7581 else if (TREE_CODE (unqualified_id) == IDENTIFIER_NODE)
7583 if (IDENTIFIER_OPNAME_P (unqualified_id))
7586 error ("variable or field `%s' declared void", name);
7589 error ("variable or field declared void");
7590 type = integer_type_node;
7593 /* Now create the decl, which may be a VAR_DECL, a PARM_DECL
7594 or a FUNCTION_DECL, depending on DECL_CONTEXT and TYPE. */
7596 if (decl_context == PARM || decl_context == CATCHPARM)
7598 if (ctype || in_namespace)
7599 error ("cannot use `::' in parameter declaration");
7601 /* A parameter declared as an array of T is really a pointer to T.
7602 One declared as a function is really a pointer to a function.
7603 One declared as a member is really a pointer to member. */
7605 if (TREE_CODE (type) == ARRAY_TYPE)
7607 /* Transfer const-ness of array into that of type pointed to. */
7608 type = build_pointer_type (TREE_TYPE (type));
7609 type_quals = TYPE_UNQUALIFIED;
7611 else if (TREE_CODE (type) == FUNCTION_TYPE)
7612 type = build_pointer_type (type);
7618 if (decl_context == PARM)
7620 decl = cp_build_parm_decl (unqualified_id, type);
7622 bad_specifiers (decl, "parameter", virtualp, quals != TYPE_UNQUALIFIED,
7623 inlinep, friendp, raises != NULL_TREE);
7625 else if (decl_context == FIELD)
7627 /* The C99 flexible array extension. */
7628 if (!staticp && TREE_CODE (type) == ARRAY_TYPE
7629 && TYPE_DOMAIN (type) == NULL_TREE)
7631 tree itype = compute_array_index_type (dname, integer_zero_node);
7632 type = build_cplus_array_type (TREE_TYPE (type), itype);
7635 if (type == error_mark_node)
7637 /* Happens when declaring arrays of sizes which
7638 are error_mark_node, for example. */
7641 else if (in_namespace && !friendp)
7643 /* Something like struct S { int N::j; }; */
7644 error ("invalid use of `::'");
7647 else if (TREE_CODE (type) == FUNCTION_TYPE)
7650 tree function_context;
7652 /* We catch the others as conflicts with the builtin
7654 if (friendp && unqualified_id == ridpointers[(int) RID_SIGNED])
7656 error ("function `%D' cannot be declared friend",
7663 if (ctype == NULL_TREE)
7664 ctype = current_class_type;
7666 if (ctype == NULL_TREE)
7668 error ("can't make `%D' into a method -- not in a class",
7670 return void_type_node;
7673 /* ``A union may [ ... ] not [ have ] virtual functions.''
7675 if (virtualp && TREE_CODE (ctype) == UNION_TYPE)
7677 error ("function `%D' declared virtual inside a union",
7679 return void_type_node;
7682 if (NEW_DELETE_OPNAME_P (unqualified_id))
7686 error ("`%D' cannot be declared virtual, since it is always static",
7691 else if (staticp < 2)
7692 type = build_method_type_directly (ctype,
7694 TYPE_ARG_TYPES (type));
7697 /* Tell grokfndecl if it needs to set TREE_PUBLIC on the node. */
7698 function_context = (ctype != NULL_TREE) ?
7699 decl_function_context (TYPE_MAIN_DECL (ctype)) : NULL_TREE;
7700 publicp = (! friendp || ! staticp)
7701 && function_context == NULL_TREE;
7702 decl = grokfndecl (ctype, type,
7703 TREE_CODE (unqualified_id) != TEMPLATE_ID_EXPR
7704 ? unqualified_id : dname,
7707 virtualp, flags, quals, raises,
7708 friendp ? -1 : 0, friendp, publicp, inlinep,
7709 funcdef_flag, template_count, in_namespace);
7710 if (decl == NULL_TREE)
7713 /* This clobbers the attrs stored in `decl' from `attrlist'. */
7714 /* The decl and setting of decl_attr is also turned off. */
7715 decl = build_decl_attribute_variant (decl, decl_attr);
7718 /* [class.conv.ctor]
7720 A constructor declared without the function-specifier
7721 explicit that can be called with a single parameter
7722 specifies a conversion from the type of its first
7723 parameter to the type of its class. Such a constructor
7724 is called a converting constructor. */
7726 DECL_NONCONVERTING_P (decl) = 1;
7727 else if (DECL_CONSTRUCTOR_P (decl))
7729 /* The constructor can be called with exactly one
7730 parameter if there is at least one parameter, and
7731 any subsequent parameters have default arguments.
7732 Ignore any compiler-added parms. */
7733 tree arg_types = FUNCTION_FIRST_USER_PARMTYPE (decl);
7735 if (arg_types == void_list_node
7737 && TREE_CHAIN (arg_types)
7738 && TREE_CHAIN (arg_types) != void_list_node
7739 && !TREE_PURPOSE (TREE_CHAIN (arg_types))))
7740 DECL_NONCONVERTING_P (decl) = 1;
7743 else if (TREE_CODE (type) == METHOD_TYPE)
7745 /* We only get here for friend declarations of
7746 members of other classes. */
7747 /* All method decls are public, so tell grokfndecl to set
7748 TREE_PUBLIC, also. */
7749 decl = grokfndecl (ctype, type,
7750 TREE_CODE (unqualified_id) != TEMPLATE_ID_EXPR
7751 ? unqualified_id : dname,
7754 virtualp, flags, quals, raises,
7755 friendp ? -1 : 0, friendp, 1, 0, funcdef_flag,
7756 template_count, in_namespace);
7757 if (decl == NULL_TREE)
7760 else if (!staticp && !dependent_type_p (type)
7761 && !COMPLETE_TYPE_P (complete_type (type))
7762 && (TREE_CODE (type) != ARRAY_TYPE || initialized == 0))
7765 error ("field `%D' has incomplete type", unqualified_id);
7767 error ("name `%T' has incomplete type", type);
7769 /* If we're instantiating a template, tell them which
7770 instantiation made the field's type be incomplete. */
7771 if (current_class_type
7772 && TYPE_NAME (current_class_type)
7773 && IDENTIFIER_TEMPLATE (TYPE_IDENTIFIER (current_class_type))
7775 && declspecs->type == type)
7776 error (" in instantiation of template `%T'",
7777 current_class_type);
7779 type = error_mark_node;
7786 error ("`%E' is neither function nor member function; "
7787 "cannot be declared friend", unqualified_id);
7795 /* Friends are treated specially. */
7796 if (ctype == current_class_type)
7797 warning ("member functions are implicitly friends of their class");
7798 else if (decl && DECL_NAME (decl))
7800 if (template_class_depth (current_class_type) == 0)
7802 decl = check_explicit_specialization
7803 (unqualified_id, decl, template_count,
7804 2 * (funcdef_flag != 0) + 4);
7805 if (decl == error_mark_node)
7806 return error_mark_node;
7809 decl = do_friend (ctype, unqualified_id, decl,
7810 *attrlist, flags, quals, funcdef_flag);
7814 return void_type_node;
7817 /* Structure field. It may not be a function, except for C++. */
7819 if (decl == NULL_TREE)
7825 /* An attempt is being made to initialize a non-static
7826 member. But, from [class.mem]:
7828 4 A member-declarator can contain a
7829 constant-initializer only if it declares a static
7830 member (_class.static_) of integral or enumeration
7831 type, see _class.static.data_.
7833 This used to be relatively common practice, but
7834 the rest of the compiler does not correctly
7835 handle the initialization unless the member is
7836 static so we make it static below. */
7837 pedwarn ("ISO C++ forbids initialization of member `%D'",
7839 pedwarn ("making `%D' static", unqualified_id);
7843 if (uses_template_parms (type))
7844 /* We'll check at instantiation time. */
7846 else if (check_static_variable_definition (unqualified_id,
7848 /* If we just return the declaration, crashes
7849 will sometimes occur. We therefore return
7850 void_type_node, as if this was a friend
7851 declaration, to cause callers to completely
7852 ignore this declaration. */
7853 return void_type_node;
7858 /* C++ allows static class members. All other work
7859 for this is done by grokfield. */
7860 decl = build_lang_decl (VAR_DECL, unqualified_id, type);
7861 set_linkage_for_static_data_member (decl);
7862 /* Even if there is an in-class initialization, DECL
7863 is considered undefined until an out-of-class
7864 definition is provided. */
7865 DECL_EXTERNAL (decl) = 1;
7869 decl = build_decl (FIELD_DECL, unqualified_id, type);
7870 DECL_NONADDRESSABLE_P (decl) = bitfield;
7871 if (storage_class == sc_mutable)
7873 DECL_MUTABLE_P (decl) = 1;
7874 storage_class = sc_none;
7878 bad_specifiers (decl, "field", virtualp, quals != TYPE_UNQUALIFIED,
7879 inlinep, friendp, raises != NULL_TREE);
7882 else if (TREE_CODE (type) == FUNCTION_TYPE
7883 || TREE_CODE (type) == METHOD_TYPE)
7888 if (!unqualified_id)
7891 if (TREE_CODE (unqualified_id) == TEMPLATE_ID_EXPR)
7892 original_name = dname;
7894 original_name = unqualified_id;
7896 if (storage_class == sc_auto)
7897 error ("storage class `auto' invalid for function `%s'", name);
7898 else if (storage_class == sc_register)
7899 error ("storage class `register' invalid for function `%s'", name);
7901 error ("storage class `__thread' invalid for function `%s'", name);
7903 /* Function declaration not at top level.
7904 Storage classes other than `extern' are not allowed
7905 and `extern' makes no difference. */
7906 if (! toplevel_bindings_p ()
7907 && (storage_class == sc_static
7908 || declspecs->specs[(int)ds_inline])
7911 if (storage_class == sc_static)
7912 pedwarn ("`static' specified invalid for function `%s' declared out of global scope", name);
7914 pedwarn ("`inline' specifier invalid for function `%s' declared out of global scope", name);
7917 if (ctype == NULL_TREE)
7921 error ("virtual non-class function `%s'", name);
7925 else if (TREE_CODE (type) == FUNCTION_TYPE && staticp < 2
7926 && !NEW_DELETE_OPNAME_P (original_name))
7927 type = build_method_type_directly (ctype,
7929 TYPE_ARG_TYPES (type));
7931 /* Record presence of `static'. */
7932 publicp = (ctype != NULL_TREE
7933 || storage_class == sc_extern
7934 || storage_class != sc_static);
7936 decl = grokfndecl (ctype, type, original_name, parms, unqualified_id,
7937 virtualp, flags, quals, raises,
7939 publicp, inlinep, funcdef_flag,
7940 template_count, in_namespace);
7941 if (decl == NULL_TREE)
7946 int invalid_static = 0;
7948 /* Don't allow a static member function in a class, and forbid
7949 declaring main to be static. */
7950 if (TREE_CODE (type) == METHOD_TYPE)
7952 pedwarn ("cannot declare member function `%D' to have static linkage", decl);
7955 else if (current_function_decl)
7957 /* FIXME need arm citation */
7958 error ("cannot declare static function inside another function");
7965 storage_class = sc_none;
7971 /* It's a variable. */
7973 /* An uninitialized decl with `extern' is a reference. */
7974 decl = grokvardecl (type, unqualified_id,
7977 (type_quals & TYPE_QUAL_CONST) != 0,
7978 ctype ? ctype : in_namespace);
7979 bad_specifiers (decl, "variable", virtualp, quals != TYPE_UNQUALIFIED,
7980 inlinep, friendp, raises != NULL_TREE);
7984 DECL_CONTEXT (decl) = ctype;
7987 pedwarn ("`static' may not be used when defining (as opposed to declaring) a static data member");
7989 storage_class = sc_none;
7991 if (storage_class == sc_register && TREE_STATIC (decl))
7993 error ("static member `%D' declared `register'", decl);
7994 storage_class = sc_none;
7996 if (storage_class == sc_extern && pedantic)
7998 pedwarn ("cannot explicitly declare member `%#D' to have extern linkage",
8000 storage_class = sc_none;
8005 /* Record `register' declaration for warnings on &
8006 and in case doing stupid register allocation. */
8008 if (storage_class == sc_register)
8009 DECL_REGISTER (decl) = 1;
8010 else if (storage_class == sc_extern)
8011 DECL_THIS_EXTERN (decl) = 1;
8012 else if (storage_class == sc_static)
8013 DECL_THIS_STATIC (decl) = 1;
8015 /* Record constancy and volatility. There's no need to do this
8016 when processing a template; we'll do this for the instantiated
8017 declaration based on the type of DECL. */
8018 if (!processing_template_decl)
8019 c_apply_type_quals_to_decl (type_quals, decl);
8025 /* Subroutine of start_function. Ensure that each of the parameter
8026 types (as listed in PARMS) is complete, as is required for a
8027 function definition. */
8030 require_complete_types_for_parms (tree parms)
8032 for (; parms; parms = TREE_CHAIN (parms))
8034 if (VOID_TYPE_P (TREE_TYPE (parms)))
8035 /* grokparms will have already issued an error. */
8036 TREE_TYPE (parms) = error_mark_node;
8037 else if (complete_type_or_else (TREE_TYPE (parms), parms))
8039 layout_decl (parms, 0);
8040 DECL_ARG_TYPE (parms) = type_passed_as (TREE_TYPE (parms));
8045 /* Returns nonzero if T is a local variable. */
8048 local_variable_p (tree t)
8050 if ((TREE_CODE (t) == VAR_DECL
8051 /* A VAR_DECL with a context that is a _TYPE is a static data
8053 && !TYPE_P (CP_DECL_CONTEXT (t))
8054 /* Any other non-local variable must be at namespace scope. */
8055 && !DECL_NAMESPACE_SCOPE_P (t))
8056 || (TREE_CODE (t) == PARM_DECL))
8062 /* Returns nonzero if T is an automatic local variable or a label.
8063 (These are the declarations that need to be remapped when the code
8064 containing them is duplicated.) */
8067 nonstatic_local_decl_p (tree t)
8069 return ((local_variable_p (t) && !TREE_STATIC (t))
8070 || TREE_CODE (t) == LABEL_DECL
8071 || TREE_CODE (t) == RESULT_DECL);
8074 /* Like local_variable_p, but suitable for use as a tree-walking
8078 local_variable_p_walkfn (tree *tp, int *walk_subtrees,
8079 void *data ATTRIBUTE_UNUSED)
8081 if (local_variable_p (*tp) && !DECL_ARTIFICIAL (*tp))
8083 else if (TYPE_P (*tp))
8090 /* Check that ARG, which is a default-argument expression for a
8091 parameter DECL, is valid. Returns ARG, or ERROR_MARK_NODE, if
8092 something goes wrong. DECL may also be a _TYPE node, rather than a
8093 DECL, if there is no DECL available. */
8096 check_default_argument (tree decl, tree arg)
8101 if (TREE_CODE (arg) == DEFAULT_ARG)
8102 /* We get a DEFAULT_ARG when looking at an in-class declaration
8103 with a default argument. Ignore the argument for now; we'll
8104 deal with it after the class is complete. */
8107 if (processing_template_decl || uses_template_parms (arg))
8108 /* We don't do anything checking until instantiation-time. Note
8109 that there may be uninstantiated arguments even for an
8110 instantiated function, since default arguments are not
8111 instantiated until they are needed. */
8120 decl_type = TREE_TYPE (decl);
8122 if (arg == error_mark_node
8123 || decl == error_mark_node
8124 || TREE_TYPE (arg) == error_mark_node
8125 || decl_type == error_mark_node)
8126 /* Something already went wrong. There's no need to check
8128 return error_mark_node;
8130 /* [dcl.fct.default]
8132 A default argument expression is implicitly converted to the
8134 if (!TREE_TYPE (arg)
8135 || !can_convert_arg (decl_type, TREE_TYPE (arg), arg))
8138 error ("default argument for `%#D' has type `%T'",
8139 decl, TREE_TYPE (arg));
8141 error ("default argument for parameter of type `%T' has type `%T'",
8142 decl_type, TREE_TYPE (arg));
8144 return error_mark_node;
8147 /* [dcl.fct.default]
8149 Local variables shall not be used in default argument
8152 The keyword `this' shall not be used in a default argument of a
8154 var = walk_tree_without_duplicates (&arg, local_variable_p_walkfn,
8158 error ("default argument `%E' uses local variable `%D'",
8160 return error_mark_node;
8167 /* Decode the list of parameter types for a function type.
8168 Given the list of things declared inside the parens,
8169 return a list of types.
8171 If this parameter does not end with an ellipsis, we append
8174 *PARMS is set to the chain of PARM_DECLs created. */
8177 grokparms (cp_parameter_declarator *first_parm, tree *parms)
8179 tree result = NULL_TREE;
8180 tree decls = NULL_TREE;
8181 int ellipsis = !first_parm || first_parm->ellipsis_p;
8182 cp_parameter_declarator *parm;
8185 for (parm = first_parm; parm != NULL; parm = parm->next)
8187 tree type = NULL_TREE;
8188 tree init = parm->default_argument;
8192 if (parm == no_parameters)
8195 attrs = parm->decl_specifiers.attributes;
8196 parm->decl_specifiers.attributes = NULL_TREE;
8197 decl = grokdeclarator (parm->declarator, &parm->decl_specifiers,
8198 PARM, init != NULL_TREE, &attrs);
8199 if (! decl || TREE_TYPE (decl) == error_mark_node)
8203 cplus_decl_attributes (&decl, attrs, 0);
8205 type = TREE_TYPE (decl);
8206 if (VOID_TYPE_P (type))
8208 if (same_type_p (type, void_type_node)
8209 && !DECL_NAME (decl) && !result && !parm->next && !ellipsis)
8210 /* this is a parmlist of `(void)', which is ok. */
8212 cxx_incomplete_type_error (decl, type);
8213 /* It's not a good idea to actually create parameters of
8214 type `void'; other parts of the compiler assume that a
8215 void type terminates the parameter list. */
8216 type = error_mark_node;
8217 TREE_TYPE (decl) = error_mark_node;
8220 if (type != error_mark_node)
8222 /* Top-level qualifiers on the parameters are
8223 ignored for function types. */
8224 type = cp_build_qualified_type (type, 0);
8225 if (TREE_CODE (type) == METHOD_TYPE)
8227 error ("parameter `%D' invalidly declared method type", decl);
8228 type = build_pointer_type (type);
8229 TREE_TYPE (decl) = type;
8231 else if (abstract_virtuals_error (decl, type))
8232 any_error = 1; /* Seems like a good idea. */
8233 else if (POINTER_TYPE_P (type))
8235 /* [dcl.fct]/6, parameter types cannot contain pointers
8236 (references) to arrays of unknown bound. */
8237 tree t = TREE_TYPE (type);
8238 int ptr = TYPE_PTR_P (type);
8244 else if (TREE_CODE (t) != ARRAY_TYPE)
8246 else if (!TYPE_DOMAIN (t))
8250 if (TREE_CODE (t) == ARRAY_TYPE)
8251 error ("parameter `%D' includes %s to array of unknown bound `%T'",
8252 decl, ptr ? "pointer" : "reference", t);
8255 if (!any_error && init)
8256 init = check_default_argument (decl, init);
8261 TREE_CHAIN (decl) = decls;
8263 result = tree_cons (init, type, result);
8265 decls = nreverse (decls);
8266 result = nreverse (result);
8268 result = chainon (result, void_list_node);
8275 /* D is a constructor or overloaded `operator='.
8277 Let T be the class in which D is declared. Then, this function
8280 -1 if D's is an ill-formed constructor or copy assignment operator
8281 whose first parameter is of type `T'.
8282 0 if D is not a copy constructor or copy assignment
8284 1 if D is a copy constructor or copy assignment operator whose
8285 first parameter is a reference to const qualified T.
8286 2 if D is a copy constructor or copy assignment operator whose
8287 first parameter is a reference to non-const qualified T.
8289 This function can be used as a predicate. Positive values indicate
8290 a copy constructor and nonzero values indicate a copy assignment
8300 my_friendly_assert (DECL_FUNCTION_MEMBER_P (d), 20011208);
8302 if (DECL_TEMPLATE_INFO (d) && is_member_template (DECL_TI_TEMPLATE (d)))
8303 /* Instantiations of template member functions are never copy
8304 functions. Note that member functions of templated classes are
8305 represented as template functions internally, and we must
8306 accept those as copy functions. */
8309 args = FUNCTION_FIRST_USER_PARMTYPE (d);
8313 arg_type = TREE_VALUE (args);
8315 if (TYPE_MAIN_VARIANT (arg_type) == DECL_CONTEXT (d))
8317 /* Pass by value copy assignment operator. */
8320 else if (TREE_CODE (arg_type) == REFERENCE_TYPE
8321 && TYPE_MAIN_VARIANT (TREE_TYPE (arg_type)) == DECL_CONTEXT (d))
8323 if (CP_TYPE_CONST_P (TREE_TYPE (arg_type)))
8329 args = TREE_CHAIN (args);
8331 if (args && args != void_list_node && !TREE_PURPOSE (args))
8332 /* There are more non-optional args. */
8338 /* Remember any special properties of member function DECL. */
8340 void grok_special_member_properties (tree decl)
8342 if (!DECL_NONSTATIC_MEMBER_FUNCTION_P(decl))
8343 ; /* Not special. */
8344 else if (DECL_CONSTRUCTOR_P (decl))
8346 int ctor = copy_fn_p (decl);
8352 A non-template constructor for class X is a copy
8353 constructor if its first parameter is of type X&, const
8354 X&, volatile X& or const volatile X&, and either there
8355 are no other parameters or else all other parameters have
8356 default arguments. */
8357 TYPE_HAS_INIT_REF (DECL_CONTEXT (decl)) = 1;
8359 TYPE_HAS_CONST_INIT_REF (DECL_CONTEXT (decl)) = 1;
8361 else if (sufficient_parms_p (FUNCTION_FIRST_USER_PARMTYPE (decl)))
8362 TYPE_HAS_DEFAULT_CONSTRUCTOR (DECL_CONTEXT (decl)) = 1;
8364 else if (DECL_OVERLOADED_OPERATOR_P (decl) == NOP_EXPR)
8368 A non-template assignment operator for class X is a copy
8369 assignment operator if its parameter is of type X, X&, const
8370 X&, volatile X& or const volatile X&. */
8372 int assop = copy_fn_p (decl);
8376 TYPE_HAS_ASSIGN_REF (DECL_CONTEXT (decl)) = 1;
8378 TYPE_HAS_CONST_ASSIGN_REF (DECL_CONTEXT (decl)) = 1;
8383 /* Check a constructor DECL has the correct form. Complains
8384 if the class has a constructor of the form X(X). */
8387 grok_ctor_properties (tree ctype, tree decl)
8389 int ctor_parm = copy_fn_p (decl);
8395 A declaration of a constructor for a class X is ill-formed if
8396 its first parameter is of type (optionally cv-qualified) X
8397 and either there are no other parameters or else all other
8398 parameters have default arguments.
8400 We *don't* complain about member template instantiations that
8401 have this form, though; they can occur as we try to decide
8402 what constructor to use during overload resolution. Since
8403 overload resolution will never prefer such a constructor to
8404 the non-template copy constructor (which is either explicitly
8405 or implicitly defined), there's no need to worry about their
8406 existence. Theoretically, they should never even be
8407 instantiated, but that's hard to forestall. */
8408 error ("invalid constructor; you probably meant `%T (const %T&)'",
8416 /* An operator with this code is unary, but can also be binary. */
8419 ambi_op_p (enum tree_code code)
8421 return (code == INDIRECT_REF
8422 || code == ADDR_EXPR
8423 || code == CONVERT_EXPR
8424 || code == NEGATE_EXPR
8425 || code == PREINCREMENT_EXPR
8426 || code == PREDECREMENT_EXPR);
8429 /* An operator with this name can only be unary. */
8432 unary_op_p (enum tree_code code)
8434 return (code == TRUTH_NOT_EXPR
8435 || code == BIT_NOT_EXPR
8436 || code == COMPONENT_REF
8437 || code == TYPE_EXPR);
8440 /* DECL is a declaration for an overloaded operator. Returns true if
8441 the declaration is valid; false otherwise. If COMPLAIN is true,
8442 errors are issued for invalid declarations. */
8445 grok_op_properties (tree decl, int friendp, bool complain)
8447 tree argtypes = TYPE_ARG_TYPES (TREE_TYPE (decl));
8449 int methodp = (TREE_CODE (TREE_TYPE (decl)) == METHOD_TYPE);
8450 tree name = DECL_NAME (decl);
8451 enum tree_code operator_code;
8455 /* Assume that the declaration is valid. */
8458 /* Count the number of arguments. */
8459 for (argtype = argtypes, arity = 0;
8460 argtype && argtype != void_list_node;
8461 argtype = TREE_CHAIN (argtype))
8464 if (current_class_type == NULL_TREE)
8467 if (DECL_CONV_FN_P (decl))
8468 operator_code = TYPE_EXPR;
8472 #define DEF_OPERATOR(NAME, CODE, MANGLING, ARITY, ASSN_P) \
8473 if (ansi_opname (CODE) == name) \
8475 operator_code = (CODE); \
8478 else if (ansi_assopname (CODE) == name) \
8480 operator_code = (CODE); \
8481 DECL_ASSIGNMENT_OPERATOR_P (decl) = 1; \
8485 #include "operators.def"
8491 my_friendly_assert (operator_code != LAST_CPLUS_TREE_CODE, 20000526);
8492 SET_OVERLOADED_OPERATOR_CODE (decl, operator_code);
8496 switch (operator_code)
8499 TYPE_HAS_NEW_OPERATOR (current_class_type) = 1;
8503 TYPE_GETS_DELETE (current_class_type) |= 1;
8507 TYPE_HAS_ARRAY_NEW_OPERATOR (current_class_type) = 1;
8510 case VEC_DELETE_EXPR:
8511 TYPE_GETS_DELETE (current_class_type) |= 2;
8519 /* [basic.std.dynamic.allocation]/1:
8521 A program is ill-formed if an allocation function is declared
8522 in a namespace scope other than global scope or declared static
8525 The same also holds true for deallocation functions. */
8526 if (operator_code == NEW_EXPR || operator_code == VEC_NEW_EXPR
8527 || operator_code == DELETE_EXPR || operator_code == VEC_DELETE_EXPR)
8529 if (DECL_NAMESPACE_SCOPE_P (decl))
8531 if (CP_DECL_CONTEXT (decl) != global_namespace)
8532 error ("`%D' may not be declared within a namespace", decl);
8533 else if (!TREE_PUBLIC (decl))
8534 error ("`%D' may not be declared as static", decl);
8538 if (operator_code == NEW_EXPR || operator_code == VEC_NEW_EXPR)
8539 TREE_TYPE (decl) = coerce_new_type (TREE_TYPE (decl));
8540 else if (operator_code == DELETE_EXPR || operator_code == VEC_DELETE_EXPR)
8541 TREE_TYPE (decl) = coerce_delete_type (TREE_TYPE (decl));
8544 /* An operator function must either be a non-static member function
8545 or have at least one parameter of a class, a reference to a class,
8546 an enumeration, or a reference to an enumeration. 13.4.0.6 */
8547 if (! methodp || DECL_STATIC_FUNCTION_P (decl))
8549 if (operator_code == TYPE_EXPR
8550 || operator_code == CALL_EXPR
8551 || operator_code == COMPONENT_REF
8552 || operator_code == ARRAY_REF
8553 || operator_code == NOP_EXPR)
8554 error ("`%D' must be a nonstatic member function", decl);
8559 if (DECL_STATIC_FUNCTION_P (decl))
8560 error ("`%D' must be either a non-static member function or a non-member function", decl);
8562 for (p = argtypes; p && p != void_list_node; p = TREE_CHAIN (p))
8564 tree arg = non_reference (TREE_VALUE (p));
8565 /* IS_AGGR_TYPE, rather than CLASS_TYPE_P, is used
8566 because these checks are performed even on
8567 template functions. */
8568 if (IS_AGGR_TYPE (arg) || TREE_CODE (arg) == ENUMERAL_TYPE)
8572 if (!p || p == void_list_node)
8577 error ("`%D' must have an argument of class or "
8585 /* There are no restrictions on the arguments to an overloaded
8587 if (operator_code == CALL_EXPR)
8590 if (IDENTIFIER_TYPENAME_P (name) && ! DECL_TEMPLATE_INFO (decl))
8592 tree t = TREE_TYPE (name);
8595 int ref = (TREE_CODE (t) == REFERENCE_TYPE);
8596 const char *what = 0;
8599 t = TYPE_MAIN_VARIANT (TREE_TYPE (t));
8601 if (TREE_CODE (t) == VOID_TYPE)
8603 else if (t == current_class_type)
8604 what = "the same type";
8605 /* Don't force t to be complete here. */
8606 else if (IS_AGGR_TYPE (t)
8607 && COMPLETE_TYPE_P (t)
8608 && DERIVED_FROM_P (t, current_class_type))
8609 what = "a base class";
8611 if (what && warn_conversion)
8612 warning ("conversion to %s%s will never use a type conversion operator",
8613 ref ? "a reference to " : "", what);
8616 if (operator_code == COND_EXPR)
8619 error ("ISO C++ prohibits overloading operator ?:");
8621 else if (ambi_op_p (operator_code))
8624 /* We pick the one-argument operator codes by default, so
8625 we don't have to change anything. */
8627 else if (arity == 2)
8629 /* If we thought this was a unary operator, we now know
8630 it to be a binary operator. */
8631 switch (operator_code)
8634 operator_code = MULT_EXPR;
8638 operator_code = BIT_AND_EXPR;
8642 operator_code = PLUS_EXPR;
8646 operator_code = MINUS_EXPR;
8649 case PREINCREMENT_EXPR:
8650 operator_code = POSTINCREMENT_EXPR;
8653 case PREDECREMENT_EXPR:
8654 operator_code = POSTDECREMENT_EXPR;
8661 SET_OVERLOADED_OPERATOR_CODE (decl, operator_code);
8663 if ((operator_code == POSTINCREMENT_EXPR
8664 || operator_code == POSTDECREMENT_EXPR)
8665 && ! processing_template_decl
8666 && ! same_type_p (TREE_VALUE (TREE_CHAIN (argtypes)), integer_type_node))
8669 error ("postfix `%D' must take `int' as its argument",
8673 ("postfix `%D' must take `int' as its second argument",
8680 error ("`%D' must take either zero or one argument", decl);
8682 error ("`%D' must take either one or two arguments", decl);
8685 /* More Effective C++ rule 6. */
8687 && (operator_code == POSTINCREMENT_EXPR
8688 || operator_code == POSTDECREMENT_EXPR
8689 || operator_code == PREINCREMENT_EXPR
8690 || operator_code == PREDECREMENT_EXPR))
8692 tree arg = TREE_VALUE (argtypes);
8693 tree ret = TREE_TYPE (TREE_TYPE (decl));
8694 if (methodp || TREE_CODE (arg) == REFERENCE_TYPE)
8695 arg = TREE_TYPE (arg);
8696 arg = TYPE_MAIN_VARIANT (arg);
8697 if (operator_code == PREINCREMENT_EXPR
8698 || operator_code == PREDECREMENT_EXPR)
8700 if (TREE_CODE (ret) != REFERENCE_TYPE
8701 || !same_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (ret)),
8703 warning ("prefix `%D' should return `%T'", decl,
8704 build_reference_type (arg));
8708 if (!same_type_p (TYPE_MAIN_VARIANT (ret), arg))
8709 warning ("postfix `%D' should return `%T'", decl, arg);
8713 else if (unary_op_p (operator_code))
8718 error ("`%D' must take `void'", decl);
8720 error ("`%D' must take exactly one argument", decl);
8723 else /* if (binary_op_p (operator_code)) */
8728 error ("`%D' must take exactly one argument", decl);
8730 error ("`%D' must take exactly two arguments", decl);
8733 /* More Effective C++ rule 7. */
8735 && (operator_code == TRUTH_ANDIF_EXPR
8736 || operator_code == TRUTH_ORIF_EXPR
8737 || operator_code == COMPOUND_EXPR))
8738 warning ("user-defined `%D' always evaluates both arguments",
8742 /* Effective C++ rule 23. */
8745 && !DECL_ASSIGNMENT_OPERATOR_P (decl)
8746 && (operator_code == PLUS_EXPR
8747 || operator_code == MINUS_EXPR
8748 || operator_code == TRUNC_DIV_EXPR
8749 || operator_code == MULT_EXPR
8750 || operator_code == TRUNC_MOD_EXPR)
8751 && TREE_CODE (TREE_TYPE (TREE_TYPE (decl))) == REFERENCE_TYPE)
8752 warning ("`%D' should return by value", decl);
8755 for (; argtypes && argtypes != void_list_node;
8756 argtypes = TREE_CHAIN (argtypes))
8757 if (TREE_PURPOSE (argtypes))
8759 TREE_PURPOSE (argtypes) = NULL_TREE;
8760 if (operator_code == POSTINCREMENT_EXPR
8761 || operator_code == POSTDECREMENT_EXPR)
8764 pedwarn ("`%D' cannot have default arguments", decl);
8767 error ("`%D' cannot have default arguments", decl);
8776 tag_name (enum tag_types code)
8793 /* Name lookup in an elaborated-type-specifier (after the keyword
8794 indicated by TAG_CODE) has found the TYPE_DECL DECL. If the
8795 elaborated-type-specifier is invalid, issue a diagnostic and return
8796 error_mark_node; otherwise, return the *_TYPE to which it referred.
8797 If ALLOW_TEMPLATE_P is true, TYPE may be a class template. */
8800 check_elaborated_type_specifier (enum tag_types tag_code,
8802 bool allow_template_p)
8808 struct S { struct S *p; };
8810 name lookup will find the TYPE_DECL for the implicit "S::S"
8811 typedef. Adjust for that here. */
8812 if (DECL_SELF_REFERENCE_P (decl))
8813 decl = TYPE_NAME (TREE_TYPE (decl));
8815 type = TREE_TYPE (decl);
8819 If the identifier resolves to a typedef-name or a template
8820 type-parameter, the elaborated-type-specifier is ill-formed.
8822 In other words, the only legitimate declaration to use in the
8823 elaborated type specifier is the implicit typedef created when
8824 the type is declared. */
8825 if (!DECL_IMPLICIT_TYPEDEF_P (decl))
8827 error ("using typedef-name `%D' after `%s'", decl, tag_name (tag_code));
8828 return IS_AGGR_TYPE (type) ? type : error_mark_node;
8831 if (TREE_CODE (type) == TEMPLATE_TYPE_PARM)
8833 error ("using template type parameter `%T' after `%s'",
8834 type, tag_name (tag_code));
8835 return error_mark_node;
8837 else if (TREE_CODE (type) != RECORD_TYPE
8838 && TREE_CODE (type) != UNION_TYPE
8839 && tag_code != enum_type)
8841 error ("`%T' referred to as `%s'", type, tag_name (tag_code));
8842 return error_mark_node;
8844 else if (TREE_CODE (type) != ENUMERAL_TYPE
8845 && tag_code == enum_type)
8847 error ("`%T' referred to as enum", type);
8848 return error_mark_node;
8850 else if (!allow_template_p
8851 && TREE_CODE (type) == RECORD_TYPE
8852 && CLASSTYPE_IS_TEMPLATE (type))
8854 /* If a class template appears as elaborated type specifier
8855 without a template header such as:
8857 template <class T> class C {};
8858 void f(class C); // No template header here
8860 then the required template argument is missing. */
8862 error ("template argument required for `%s %T'",
8863 tag_name (tag_code),
8864 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type)));
8865 return error_mark_node;
8871 /* Get the struct, enum or union (TAG_CODE says which) with tag NAME.
8872 Define the tag as a forward-reference if it is not defined.
8874 If a declaration is given, process it here, and report an error if
8875 multiple declarations are not identical.
8877 GLOBALIZE is false when this is also a definition. Only look in
8878 the current frame for the name (since C++ allows new names in any
8881 TEMPLATE_HEADER_P is true when this declaration is preceded by
8882 a set of template parameters. */
8885 xref_tag (enum tag_types tag_code, tree name,
8886 bool globalize, bool template_header_p)
8888 enum tree_code code;
8890 struct cp_binding_level *b = current_binding_level;
8891 tree context = NULL_TREE;
8893 timevar_push (TV_NAME_LOOKUP);
8895 my_friendly_assert (TREE_CODE (name) == IDENTIFIER_NODE, 0);
8907 code = ENUMERAL_TYPE;
8915 /* If we know we are defining this tag, only look it up in
8916 this scope and don't try to find it as a type. */
8917 t = lookup_tag (code, name, b, 1);
8921 tree decl = lookup_name (name, 2);
8923 if (decl && DECL_CLASS_TEMPLATE_P (decl))
8924 decl = DECL_TEMPLATE_RESULT (decl);
8926 if (decl && TREE_CODE (decl) == TYPE_DECL)
8928 /* Two cases we need to consider when deciding if a class
8929 template is allowed as an elaborated type specifier:
8930 1. It is a self reference to its own class.
8931 2. It comes with a template header.
8935 template <class T> class C {
8936 class C *c1; // DECL_SELF_REFERENCE_P is true
8939 template <class U> class C; // template_header_p is true
8940 template <class T> class C<T>::D {
8941 class C *c2; // DECL_SELF_REFERENCE_P is true
8944 t = check_elaborated_type_specifier (tag_code,
8947 | DECL_SELF_REFERENCE_P (decl));
8948 if (t == error_mark_node)
8949 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
8954 if (t && current_class_type
8955 && template_class_depth (current_class_type)
8956 && template_header_p)
8958 /* Since GLOBALIZE is nonzero, we are not looking at a
8959 definition of this tag. Since, in addition, we are currently
8960 processing a (member) template declaration of a template
8961 class, we must be very careful; consider:
8968 { template <class V>
8969 friend struct S1; };
8971 Here, the S2::S1 declaration should not be confused with the
8972 outer declaration. In particular, the inner version should
8973 have a template parameter of level 2, not level 1. This
8974 would be particularly important if the member declaration
8977 template <class V = U> friend struct S1;
8979 say, when we should tsubst into `U' when instantiating
8980 S2. On the other hand, when presented with:
8990 we must find the inner binding eventually. We
8991 accomplish this by making sure that the new type we
8992 create to represent this declaration has the right
8994 context = TYPE_CONTEXT (t);
9001 /* If no such tag is yet defined, create a forward-reference node
9002 and record it as the "definition".
9003 When a real declaration of this type is found,
9004 the forward-reference will be altered into a real type. */
9005 if (code == ENUMERAL_TYPE)
9007 error ("use of enum `%#D' without previous declaration", name);
9008 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
9012 t = make_aggr_type (code);
9013 TYPE_CONTEXT (t) = context;
9014 pushtag (name, t, globalize);
9019 if (!globalize && processing_template_decl && IS_AGGR_TYPE (t))
9020 redeclare_class_template (t, current_template_parms);
9021 else if (!processing_template_decl
9023 && CLASSTYPE_IS_TEMPLATE (t))
9025 error ("redeclaration of `%T' as a non-template", t);
9026 t = error_mark_node;
9030 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, t);
9034 xref_tag_from_type (tree old, tree id, int globalize)
9036 enum tag_types tag_kind;
9038 if (TREE_CODE (old) == RECORD_TYPE)
9039 tag_kind = (CLASSTYPE_DECLARED_CLASS (old) ? class_type : record_type);
9041 tag_kind = union_type;
9043 if (id == NULL_TREE)
9044 id = TYPE_IDENTIFIER (old);
9046 return xref_tag (tag_kind, id, globalize, false);
9049 /* Create the binfo hierarchy for REF with (possibly NULL) base list
9050 BASE_LIST. For each element on BASE_LIST the TREE_PURPOSE is an
9051 access_* node, and the TREE_VALUE is the type of the base-class.
9052 Non-NULL TREE_TYPE indicates virtual inheritance. */
9055 xref_basetypes (tree ref, tree base_list)
9058 tree binfo, base_binfo;
9059 unsigned max_vbases = 0; /* Maxium direct & indirect virtual bases. */
9060 unsigned max_bases = 0; /* Maxium direct bases. */
9062 tree default_access;
9063 tree igo_prev; /* Track Inheritance Graph Order. */
9065 if (ref == error_mark_node)
9068 /* The base of a derived class is private by default, all others are
9070 default_access = (TREE_CODE (ref) == RECORD_TYPE
9071 && CLASSTYPE_DECLARED_CLASS (ref)
9072 ? access_private_node : access_public_node);
9074 /* First, make sure that any templates in base-classes are
9075 instantiated. This ensures that if we call ourselves recursively
9076 we do not get confused about which classes are marked and which
9081 tree basetype = TREE_VALUE (*basep);
9083 if (!(processing_template_decl && uses_template_parms (basetype))
9084 && !complete_type_or_else (basetype, NULL))
9085 /* An incomplete type. Remove it from the list. */
9086 *basep = TREE_CHAIN (*basep);
9090 if (TREE_TYPE (*basep))
9092 if (CLASS_TYPE_P (basetype))
9093 max_vbases += VEC_length (tree, CLASSTYPE_VBASECLASSES (basetype));
9094 basep = &TREE_CHAIN (*basep);
9098 SET_CLASSTYPE_MARKED (ref);
9100 /* The binfo slot should be empty, unless this is an (ill-formed)
9102 my_friendly_assert (!TYPE_BINFO (ref) || TYPE_SIZE (ref), 20040706);
9103 my_friendly_assert (TYPE_MAIN_VARIANT (ref) == ref, 20040712);
9105 binfo = make_tree_binfo (max_bases);
9107 TYPE_BINFO (ref) = binfo;
9108 BINFO_OFFSET (binfo) = size_zero_node;
9109 BINFO_TYPE (binfo) = ref;
9113 BINFO_BASE_ACCESSES (binfo) = VEC_alloc (tree, max_bases);
9114 /* An aggregate cannot have baseclasses. */
9115 CLASSTYPE_NON_AGGREGATE (ref) = 1;
9117 if (TREE_CODE (ref) == UNION_TYPE)
9118 error ("derived union `%T' invalid", ref);
9123 TYPE_USES_MULTIPLE_INHERITANCE (ref) = 1;
9124 /* If there is more than one non-empty they cannot be at the
9126 TYPE_BASE_CONVS_MAY_REQUIRE_CODE_P (ref) = 1;
9128 if (TYPE_FOR_JAVA (ref))
9129 error ("Java class '%T' cannot have multiple bases", ref);
9134 CLASSTYPE_VBASECLASSES (ref) = VEC_alloc (tree, max_vbases);
9135 TYPE_USES_VIRTUAL_BASECLASSES (ref) = 1;
9136 /* Converting to a virtual base class requires looking up the
9137 offset of the virtual base. */
9138 TYPE_BASE_CONVS_MAY_REQUIRE_CODE_P (ref) = 1;
9140 if (TYPE_FOR_JAVA (ref))
9141 error ("Java class '%T' cannot have virtual bases", ref);
9144 for (igo_prev = binfo; base_list; base_list = TREE_CHAIN (base_list))
9146 tree access = TREE_PURPOSE (base_list);
9147 int via_virtual = TREE_TYPE (base_list) != NULL_TREE;
9148 tree basetype = TREE_VALUE (base_list);
9150 if (access == access_default_node)
9151 access = default_access;
9153 if (TREE_CODE (basetype) == TYPE_DECL)
9154 basetype = TREE_TYPE (basetype);
9155 if (TREE_CODE (basetype) != RECORD_TYPE
9156 && TREE_CODE (basetype) != TYPENAME_TYPE
9157 && TREE_CODE (basetype) != TEMPLATE_TYPE_PARM
9158 && TREE_CODE (basetype) != BOUND_TEMPLATE_TEMPLATE_PARM)
9160 error ("base type `%T' fails to be a struct or class type",
9165 if (CLASSTYPE_MARKED (basetype))
9167 if (basetype == ref)
9168 error ("recursive type `%T' undefined", basetype);
9170 error ("duplicate base type `%T' invalid", basetype);
9173 SET_CLASSTYPE_MARKED (basetype);
9175 if (TYPE_FOR_JAVA (basetype) && (current_lang_depth () == 0))
9176 TYPE_FOR_JAVA (ref) = 1;
9178 base_binfo = NULL_TREE;
9179 if (CLASS_TYPE_P (basetype) && !dependent_type_p (basetype))
9181 base_binfo = TYPE_BINFO (basetype);
9182 /* The orignal basetype could have been a typedef'd type. */
9183 basetype = BINFO_TYPE (base_binfo);
9185 /* Inherit flags from the base. */
9186 TYPE_HAS_NEW_OPERATOR (ref)
9187 |= TYPE_HAS_NEW_OPERATOR (basetype);
9188 TYPE_HAS_ARRAY_NEW_OPERATOR (ref)
9189 |= TYPE_HAS_ARRAY_NEW_OPERATOR (basetype);
9190 TYPE_GETS_DELETE (ref) |= TYPE_GETS_DELETE (basetype);
9191 TYPE_USES_MULTIPLE_INHERITANCE (ref)
9192 |= TYPE_USES_MULTIPLE_INHERITANCE (basetype);
9193 TYPE_BASE_CONVS_MAY_REQUIRE_CODE_P (ref)
9194 |= TYPE_BASE_CONVS_MAY_REQUIRE_CODE_P (basetype);
9195 TYPE_HAS_CONVERSION (ref) |= TYPE_HAS_CONVERSION (basetype);
9198 base_binfo = copy_binfo (base_binfo, basetype, ref,
9199 &igo_prev, via_virtual);
9200 if (!BINFO_INHERITANCE_CHAIN (base_binfo))
9201 BINFO_INHERITANCE_CHAIN (base_binfo) = binfo;
9203 BINFO_BASE_APPEND (binfo, base_binfo);
9204 BINFO_BASE_ACCESS_APPEND (binfo, access);
9207 /* Unmark all the types. */
9208 for (i = 0; BINFO_BASE_ITERATE (binfo, i, base_binfo); i++)
9209 CLEAR_CLASSTYPE_MARKED (BINFO_TYPE (base_binfo));
9210 CLEAR_CLASSTYPE_MARKED (ref);
9214 /* Begin compiling the definition of an enumeration type.
9215 NAME is its name (or null if anonymous).
9216 Returns the type object, as yet incomplete.
9217 Also records info about it so that build_enumerator
9218 may be used to declare the individual values as they are read. */
9221 start_enum (tree name)
9223 tree enumtype = NULL_TREE;
9224 struct cp_binding_level *b = current_binding_level;
9226 /* If this is the real definition for a previous forward reference,
9227 fill in the contents in the same object that used to be the
9228 forward reference. */
9230 if (name != NULL_TREE)
9231 enumtype = lookup_tag (ENUMERAL_TYPE, name, b, 1);
9233 if (enumtype != NULL_TREE && TREE_CODE (enumtype) == ENUMERAL_TYPE)
9235 error ("multiple definition of `%#T'", enumtype);
9236 error ("%Jprevious definition here", TYPE_MAIN_DECL (enumtype));
9237 /* Clear out TYPE_VALUES, and start again. */
9238 TYPE_VALUES (enumtype) = NULL_TREE;
9242 enumtype = make_node (ENUMERAL_TYPE);
9243 pushtag (name, enumtype, 0);
9249 /* After processing and defining all the values of an enumeration type,
9250 install their decls in the enumeration type and finish it off.
9251 ENUMTYPE is the type object and VALUES a list of name-value pairs. */
9254 finish_enum (tree enumtype)
9266 integer_type_kind itk;
9267 tree underlying_type = NULL_TREE;
9269 /* We built up the VALUES in reverse order. */
9270 TYPE_VALUES (enumtype) = nreverse (TYPE_VALUES (enumtype));
9272 /* For an enum defined in a template, just set the type of the values;
9273 all further processing is postponed until the template is
9274 instantiated. We need to set the type so that tsubst of a CONST_DECL
9276 if (processing_template_decl)
9278 for (values = TYPE_VALUES (enumtype);
9280 values = TREE_CHAIN (values))
9281 TREE_TYPE (TREE_VALUE (values)) = enumtype;
9282 if (at_function_scope_p ())
9283 add_stmt (build_min (TAG_DEFN, enumtype));
9287 /* Determine the minimum and maximum values of the enumerators. */
9288 if (TYPE_VALUES (enumtype))
9290 minnode = maxnode = NULL_TREE;
9292 for (values = TYPE_VALUES (enumtype);
9294 values = TREE_CHAIN (values))
9296 decl = TREE_VALUE (values);
9298 /* [dcl.enum]: Following the closing brace of an enum-specifier,
9299 each enumerator has the type of its enumeration. Prior to the
9300 closing brace, the type of each enumerator is the type of its
9301 initializing value. */
9302 TREE_TYPE (decl) = enumtype;
9304 /* Update the minimum and maximum values, if appropriate. */
9305 value = DECL_INITIAL (decl);
9306 /* Figure out what the minimum and maximum values of the
9309 minnode = maxnode = value;
9310 else if (tree_int_cst_lt (maxnode, value))
9312 else if (tree_int_cst_lt (value, minnode))
9315 /* Set the TREE_TYPE for the values as well. That's so that when
9316 we call decl_constant_value we get an entity of the right type
9317 (but with the constant value). But first make a copy so we
9318 don't clobber shared INTEGER_CSTs. */
9319 if (TREE_TYPE (value) != enumtype)
9321 value = DECL_INITIAL (decl) = copy_node (value);
9322 TREE_TYPE (value) = enumtype;
9329 If the enumerator-list is empty, the underlying type is as if
9330 the enumeration had a single enumerator with value 0. */
9331 minnode = maxnode = integer_zero_node;
9333 /* Compute the number of bits require to represent all values of the
9334 enumeration. We must do this before the type of MINNODE and
9335 MAXNODE are transformed, since min_precision relies on the
9336 TREE_TYPE of the value it is passed. */
9337 unsignedp = tree_int_cst_sgn (minnode) >= 0;
9338 lowprec = min_precision (minnode, unsignedp);
9339 highprec = min_precision (maxnode, unsignedp);
9340 precision = MAX (lowprec, highprec);
9342 /* Determine the underlying type of the enumeration.
9346 The underlying type of an enumeration is an integral type that
9347 can represent all the enumerator values defined in the
9348 enumeration. It is implementation-defined which integral type is
9349 used as the underlying type for an enumeration except that the
9350 underlying type shall not be larger than int unless the value of
9351 an enumerator cannot fit in an int or unsigned int.
9353 We use "int" or an "unsigned int" as the underlying type, even if
9354 a smaller integral type would work, unless the user has
9355 explicitly requested that we use the smallest possible type. */
9356 for (itk = (flag_short_enums ? itk_char : itk_int);
9360 underlying_type = integer_types[itk];
9361 if (TYPE_PRECISION (underlying_type) >= precision
9362 && TYPE_UNSIGNED (underlying_type) == unsignedp)
9365 if (itk == itk_none)
9369 IF no integral type can represent all the enumerator values, the
9370 enumeration is ill-formed. */
9371 error ("no integral type can represent all of the enumerator values "
9372 "for `%T'", enumtype);
9373 precision = TYPE_PRECISION (long_long_integer_type_node);
9374 underlying_type = integer_types[itk_unsigned_long_long];
9377 /* Compute the minium and maximum values for the type.
9381 For an enumeration where emin is the smallest enumerator and emax
9382 is the largest, the values of the enumeration are the values of the
9383 underlying type in the range bmin to bmax, where bmin and bmax are,
9384 respectively, the smallest and largest values of the smallest bit-
9385 field that can store emin and emax. */
9386 TYPE_PRECISION (enumtype) = precision;
9387 set_min_and_max_values_for_integral_type (enumtype, precision, unsignedp);
9391 The value of sizeof() applied to an enumeration type, an object
9392 of an enumeration type, or an enumerator, is the value of sizeof()
9393 applied to the underlying type. */
9394 TYPE_SIZE (enumtype) = TYPE_SIZE (underlying_type);
9395 TYPE_SIZE_UNIT (enumtype) = TYPE_SIZE_UNIT (underlying_type);
9396 TYPE_MODE (enumtype) = TYPE_MODE (underlying_type);
9397 TYPE_ALIGN (enumtype) = TYPE_ALIGN (underlying_type);
9398 TYPE_USER_ALIGN (enumtype) = TYPE_USER_ALIGN (underlying_type);
9399 TYPE_UNSIGNED (enumtype) = TYPE_UNSIGNED (underlying_type);
9401 /* Convert each of the enumerators to the type of the underlying
9402 type of the enumeration. */
9403 for (values = TYPE_VALUES (enumtype); values; values = TREE_CHAIN (values))
9405 decl = TREE_VALUE (values);
9406 value = perform_implicit_conversion (underlying_type,
9407 DECL_INITIAL (decl));
9408 TREE_TYPE (value) = enumtype;
9409 DECL_INITIAL (decl) = value;
9410 TREE_VALUE (values) = value;
9413 /* Fix up all variant types of this enum type. */
9414 for (t = TYPE_MAIN_VARIANT (enumtype); t; t = TYPE_NEXT_VARIANT (t))
9416 TYPE_VALUES (t) = TYPE_VALUES (enumtype);
9417 TYPE_MIN_VALUE (t) = TYPE_MIN_VALUE (enumtype);
9418 TYPE_MAX_VALUE (t) = TYPE_MAX_VALUE (enumtype);
9419 TYPE_SIZE (t) = TYPE_SIZE (enumtype);
9420 TYPE_SIZE_UNIT (t) = TYPE_SIZE_UNIT (enumtype);
9421 TYPE_MODE (t) = TYPE_MODE (enumtype);
9422 TYPE_PRECISION (t) = TYPE_PRECISION (enumtype);
9423 TYPE_ALIGN (t) = TYPE_ALIGN (enumtype);
9424 TYPE_USER_ALIGN (t) = TYPE_USER_ALIGN (enumtype);
9425 TYPE_UNSIGNED (t) = TYPE_UNSIGNED (enumtype);
9428 /* Finish debugging output for this type. */
9429 rest_of_type_compilation (enumtype, namespace_bindings_p ());
9432 /* Build and install a CONST_DECL for an enumeration constant of the
9433 enumeration type ENUMTYPE whose NAME and VALUE (if any) are provided.
9434 Assignment of sequential values by default is handled here. */
9437 build_enumerator (tree name, tree value, tree enumtype)
9443 /* Remove no-op casts from the value. */
9445 STRIP_TYPE_NOPS (value);
9447 if (! processing_template_decl)
9449 /* Validate and default VALUE. */
9450 if (value != NULL_TREE)
9452 value = decl_constant_value (value);
9454 if (TREE_CODE (value) == INTEGER_CST)
9456 value = perform_integral_promotions (value);
9457 constant_expression_warning (value);
9461 error ("enumerator value for `%D' not integer constant", name);
9466 /* Default based on previous value. */
9467 if (value == NULL_TREE)
9471 if (TYPE_VALUES (enumtype))
9473 /* The next value is the previous value ... */
9474 prev_value = DECL_INITIAL (TREE_VALUE (TYPE_VALUES (enumtype)));
9476 value = cp_build_binary_op (PLUS_EXPR,
9480 if (tree_int_cst_lt (value, prev_value))
9481 error ("overflow in enumeration values at `%D'", name);
9484 value = integer_zero_node;
9487 /* Remove no-op casts from the value. */
9488 STRIP_TYPE_NOPS (value);
9491 /* C++ associates enums with global, function, or class declarations. */
9492 context = current_scope ();
9494 context = current_namespace;
9496 /* Build the actual enumeration constant. Note that the enumeration
9497 constants have the type of their initializers until the
9498 enumeration is complete:
9502 Following the closing brace of an enum-specifier, each enumer-
9503 ator has the type of its enumeration. Prior to the closing
9504 brace, the type of each enumerator is the type of its
9507 In finish_enum we will reset the type. Of course, if we're
9508 processing a template, there may be no value. */
9509 type = value ? TREE_TYPE (value) : NULL_TREE;
9511 if (context && context == current_class_type)
9512 /* This enum declaration is local to the class. We need the full
9513 lang_decl so that we can record DECL_CLASS_CONTEXT, for example. */
9514 decl = build_lang_decl (CONST_DECL, name, type);
9516 /* It's a global enum, or it's local to a function. (Note local to
9517 a function could mean local to a class method. */
9518 decl = build_decl (CONST_DECL, name, type);
9520 DECL_CONTEXT (decl) = FROB_CONTEXT (context);
9521 TREE_CONSTANT (decl) = 1;
9522 TREE_INVARIANT (decl) = 1;
9523 TREE_READONLY (decl) = 1;
9524 DECL_INITIAL (decl) = value;
9526 if (context && context == current_class_type)
9527 /* In something like `struct S { enum E { i = 7 }; };' we put `i'
9528 on the TYPE_FIELDS list for `S'. (That's so that you can say
9529 things like `S::i' later.) */
9530 finish_member_declaration (decl);
9534 /* Add this enumeration constant to the list for this type. */
9535 TYPE_VALUES (enumtype) = tree_cons (name, decl, TYPE_VALUES (enumtype));
9539 /* We're defining DECL. Make sure that it's type is OK. */
9542 check_function_type (tree decl, tree current_function_parms)
9544 tree fntype = TREE_TYPE (decl);
9545 tree return_type = complete_type (TREE_TYPE (fntype));
9547 /* In a function definition, arg types must be complete. */
9548 require_complete_types_for_parms (current_function_parms);
9550 if (!COMPLETE_OR_VOID_TYPE_P (return_type))
9552 error ("return type `%#T' is incomplete", TREE_TYPE (fntype));
9554 /* Make it return void instead, but don't change the
9555 type of the DECL_RESULT, in case we have a named return value. */
9556 if (TREE_CODE (fntype) == METHOD_TYPE)
9558 tree ctype = TREE_TYPE (TREE_VALUE (TYPE_ARG_TYPES (fntype)));
9560 = build_method_type_directly (ctype,
9562 FUNCTION_ARG_CHAIN (decl));
9566 = build_function_type (void_type_node,
9567 TYPE_ARG_TYPES (TREE_TYPE (decl)));
9569 = build_exception_variant (fntype,
9570 TYPE_RAISES_EXCEPTIONS (fntype));
9573 abstract_virtuals_error (decl, TREE_TYPE (fntype));
9576 /* Create the FUNCTION_DECL for a function definition.
9577 DECLSPECS and DECLARATOR are the parts of the declaration;
9578 they describe the function's name and the type it returns,
9579 but twisted together in a fashion that parallels the syntax of C.
9581 FLAGS is a bitwise or of SF_PRE_PARSED (indicating that the
9582 DECLARATOR is really the DECL for the function we are about to
9583 process and that DECLSPECS should be ignored), SF_INCLASS_INLINE
9584 indicating that the function is an inline defined in-class.
9586 This function creates a binding context for the function body
9587 as well as setting up the FUNCTION_DECL in current_function_decl.
9589 For C++, we must first check whether that datum makes any sense.
9590 For example, "class A local_a(1,2);" means that variable local_a
9591 is an aggregate of type A, which should have a constructor
9592 applied to it with the argument list [1, 2]. */
9595 start_preparsed_function (tree decl1, tree attrs, int flags)
9597 tree ctype = NULL_TREE;
9600 int doing_friend = 0;
9601 struct cp_binding_level *bl;
9602 tree current_function_parms;
9605 my_friendly_assert (TREE_CODE (TREE_VALUE (void_list_node)) == VOID_TYPE, 160);
9606 my_friendly_assert (TREE_CHAIN (void_list_node) == NULL_TREE, 161);
9608 fntype = TREE_TYPE (decl1);
9609 if (TREE_CODE (fntype) == METHOD_TYPE)
9610 ctype = TYPE_METHOD_BASETYPE (fntype);
9612 /* ISO C++ 11.4/5. A friend function defined in a class is in
9613 the (lexical) scope of the class in which it is defined. */
9614 if (!ctype && DECL_FRIEND_P (decl1))
9616 ctype = DECL_FRIEND_CONTEXT (decl1);
9618 /* CTYPE could be null here if we're dealing with a template;
9619 for example, `inline friend float foo()' inside a template
9620 will have no CTYPE set. */
9621 if (ctype && TREE_CODE (ctype) != RECORD_TYPE)
9627 if (DECL_DECLARED_INLINE_P (decl1)
9628 && lookup_attribute ("noinline", attrs))
9629 warning ("%Jinline function '%D' given attribute noinline", decl1, decl1);
9631 if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (decl1))
9632 /* This is a constructor, we must ensure that any default args
9633 introduced by this definition are propagated to the clones
9634 now. The clones are used directly in overload resolution. */
9635 adjust_clone_args (decl1);
9637 /* Sometimes we don't notice that a function is a static member, and
9638 build a METHOD_TYPE for it. Fix that up now. */
9639 if (ctype != NULL_TREE && DECL_STATIC_FUNCTION_P (decl1)
9640 && TREE_CODE (TREE_TYPE (decl1)) == METHOD_TYPE)
9642 revert_static_member_fn (decl1);
9646 /* Set up current_class_type, and enter the scope of the class, if
9649 push_nested_class (ctype);
9650 else if (DECL_STATIC_FUNCTION_P (decl1))
9651 push_nested_class (DECL_CONTEXT (decl1));
9653 /* Now that we have entered the scope of the class, we must restore
9654 the bindings for any template parameters surrounding DECL1, if it
9655 is an inline member template. (Order is important; consider the
9656 case where a template parameter has the same name as a field of
9657 the class.) It is not until after this point that
9658 PROCESSING_TEMPLATE_DECL is guaranteed to be set up correctly. */
9659 if (flags & SF_INCLASS_INLINE)
9660 maybe_begin_member_template_processing (decl1);
9662 /* Effective C++ rule 15. */
9664 && DECL_OVERLOADED_OPERATOR_P (decl1) == NOP_EXPR
9665 && TREE_CODE (TREE_TYPE (fntype)) == VOID_TYPE)
9666 warning ("`operator=' should return a reference to `*this'");
9668 /* Make the init_value nonzero so pushdecl knows this is not tentative.
9669 error_mark_node is replaced below (in poplevel) with the BLOCK. */
9670 if (!DECL_INITIAL (decl1))
9671 DECL_INITIAL (decl1) = error_mark_node;
9673 /* This function exists in static storage.
9674 (This does not mean `static' in the C sense!) */
9675 TREE_STATIC (decl1) = 1;
9677 /* We must call push_template_decl after current_class_type is set
9678 up. (If we are processing inline definitions after exiting a
9679 class scope, current_class_type will be NULL_TREE until set above
9680 by push_nested_class.) */
9681 if (processing_template_decl)
9682 decl1 = push_template_decl (decl1);
9684 /* We are now in the scope of the function being defined. */
9685 current_function_decl = decl1;
9687 /* Save the parm names or decls from this function's declarator
9688 where store_parm_decls will find them. */
9689 current_function_parms = DECL_ARGUMENTS (decl1);
9691 /* Make sure the parameter and return types are reasonable. When
9692 you declare a function, these types can be incomplete, but they
9693 must be complete when you define the function. */
9694 if (! processing_template_decl)
9695 check_function_type (decl1, current_function_parms);
9697 /* Build the return declaration for the function. */
9698 restype = TREE_TYPE (fntype);
9699 /* Promote the value to int before returning it. */
9700 if (c_promoting_integer_type_p (restype))
9701 restype = type_promotes_to (restype);
9702 if (DECL_RESULT (decl1) == NULL_TREE)
9706 resdecl = build_decl (RESULT_DECL, 0, TYPE_MAIN_VARIANT (restype));
9707 DECL_ARTIFICIAL (resdecl) = 1;
9708 DECL_IGNORED_P (resdecl) = 1;
9709 DECL_RESULT (decl1) = resdecl;
9711 c_apply_type_quals_to_decl (cp_type_quals (restype), resdecl);
9714 /* Initialize RTL machinery. We cannot do this until
9715 CURRENT_FUNCTION_DECL and DECL_RESULT are set up. We do this
9716 even when processing a template; this is how we get
9717 CFUN set up, and our per-function variables initialized.
9718 FIXME factor out the non-RTL stuff. */
9719 bl = current_binding_level;
9720 allocate_struct_function (decl1);
9721 current_binding_level = bl;
9723 /* Even though we're inside a function body, we still don't want to
9724 call expand_expr to calculate the size of a variable-sized array.
9725 We haven't necessarily assigned RTL to all variables yet, so it's
9726 not safe to try to expand expressions involving them. */
9727 cfun->x_dont_save_pending_sizes_p = 1;
9729 /* Start the statement-tree, start the tree now. */
9730 DECL_SAVED_TREE (decl1) = push_stmt_list ();
9732 /* Let the user know we're compiling this function. */
9733 announce_function (decl1);
9735 /* Record the decl so that the function name is defined.
9736 If we already have a decl for this name, and it is a FUNCTION_DECL,
9737 use the old decl. */
9738 if (!processing_template_decl && !(flags & SF_PRE_PARSED))
9740 /* A specialization is not used to guide overload resolution. */
9741 if (!DECL_FUNCTION_MEMBER_P (decl1)
9742 && !(DECL_USE_TEMPLATE (decl1) &&
9743 PRIMARY_TEMPLATE_P (DECL_TI_TEMPLATE (decl1))))
9745 tree olddecl = pushdecl (decl1);
9747 if (olddecl == error_mark_node)
9748 /* If something went wrong when registering the declaration,
9749 use DECL1; we have to have a FUNCTION_DECL to use when
9750 parsing the body of the function. */
9753 /* Otherwise, OLDDECL is either a previous declaration of
9754 the same function or DECL1 itself. */
9759 /* We need to set the DECL_CONTEXT. */
9760 if (!DECL_CONTEXT (decl1) && DECL_TEMPLATE_INFO (decl1))
9761 DECL_CONTEXT (decl1) = DECL_CONTEXT (DECL_TI_TEMPLATE (decl1));
9762 /* And make sure we have enough default args. */
9763 check_default_args (decl1);
9765 fntype = TREE_TYPE (decl1);
9768 /* Determine the ELF visibility attribute for the function. We must
9769 not do this before calling "pushdecl", as we must allow
9770 "duplicate_decls" to merge any attributes appropriately. */
9771 if (!DECL_CLONED_FUNCTION_P (decl1))
9772 determine_visibility (decl1);
9774 /* Reset these in case the call to pushdecl changed them. */
9775 current_function_decl = decl1;
9778 /* If we are (erroneously) defining a function that we have already
9779 defined before, wipe out what we knew before. */
9780 if (!DECL_PENDING_INLINE_P (decl1))
9781 DECL_SAVED_FUNCTION_DATA (decl1) = NULL;
9783 if (ctype && !doing_friend && !DECL_STATIC_FUNCTION_P (decl1))
9785 /* We know that this was set up by `grokclassfn'. We do not
9786 wait until `store_parm_decls', since evil parse errors may
9787 never get us to that point. Here we keep the consistency
9788 between `current_class_type' and `current_class_ptr'. */
9789 tree t = DECL_ARGUMENTS (decl1);
9791 my_friendly_assert (t != NULL_TREE && TREE_CODE (t) == PARM_DECL,
9793 my_friendly_assert (TREE_CODE (TREE_TYPE (t)) == POINTER_TYPE,
9796 cp_function_chain->x_current_class_ref
9797 = build_indirect_ref (t, NULL);
9798 cp_function_chain->x_current_class_ptr = t;
9800 /* Constructors and destructors need to know whether they're "in
9801 charge" of initializing virtual base classes. */
9803 if (DECL_HAS_IN_CHARGE_PARM_P (decl1))
9805 current_in_charge_parm = t;
9808 if (DECL_HAS_VTT_PARM_P (decl1))
9810 if (DECL_NAME (t) != vtt_parm_identifier)
9812 current_vtt_parm = t;
9816 if (DECL_INTERFACE_KNOWN (decl1))
9818 tree ctx = decl_function_context (decl1);
9820 if (DECL_NOT_REALLY_EXTERN (decl1))
9821 DECL_EXTERNAL (decl1) = 0;
9823 if (ctx != NULL_TREE && DECL_DECLARED_INLINE_P (ctx)
9824 && TREE_PUBLIC (ctx))
9825 /* This is a function in a local class in an extern inline
9827 comdat_linkage (decl1);
9829 /* If this function belongs to an interface, it is public.
9830 If it belongs to someone else's interface, it is also external.
9831 This only affects inlines and template instantiations. */
9832 else if (interface_unknown == 0
9833 && ! DECL_TEMPLATE_INSTANTIATION (decl1))
9835 if (DECL_DECLARED_INLINE_P (decl1)
9836 || DECL_TEMPLATE_INSTANTIATION (decl1)
9837 || processing_template_decl)
9839 DECL_EXTERNAL (decl1)
9841 || (DECL_DECLARED_INLINE_P (decl1)
9842 && ! flag_implement_inlines
9843 && !DECL_VINDEX (decl1)));
9845 /* For WIN32 we also want to put these in linkonce sections. */
9846 maybe_make_one_only (decl1);
9849 DECL_EXTERNAL (decl1) = 0;
9850 DECL_NOT_REALLY_EXTERN (decl1) = 0;
9851 DECL_INTERFACE_KNOWN (decl1) = 1;
9852 /* If this function is in an interface implemented in this file,
9853 make sure that the backend knows to emit this function
9855 if (!DECL_EXTERNAL (decl1))
9856 mark_needed (decl1);
9858 else if (interface_unknown && interface_only
9859 && ! DECL_TEMPLATE_INSTANTIATION (decl1))
9861 /* If MULTIPLE_SYMBOL_SPACES is defined and we saw a #pragma
9862 interface, we will have interface_only set but not
9863 interface_known. In that case, we don't want to use the normal
9864 heuristics because someone will supply a #pragma implementation
9865 elsewhere, and deducing it here would produce a conflict. */
9866 comdat_linkage (decl1);
9867 DECL_EXTERNAL (decl1) = 0;
9868 DECL_INTERFACE_KNOWN (decl1) = 1;
9869 DECL_DEFER_OUTPUT (decl1) = 1;
9873 /* This is a definition, not a reference.
9874 So clear DECL_EXTERNAL. */
9875 DECL_EXTERNAL (decl1) = 0;
9877 if ((DECL_DECLARED_INLINE_P (decl1)
9878 || DECL_TEMPLATE_INSTANTIATION (decl1))
9879 && ! DECL_INTERFACE_KNOWN (decl1)
9880 /* Don't try to defer nested functions for now. */
9881 && ! decl_function_context (decl1))
9882 DECL_DEFER_OUTPUT (decl1) = 1;
9884 DECL_INTERFACE_KNOWN (decl1) = 1;
9887 begin_scope (sk_function_parms, decl1);
9891 if (DECL_DESTRUCTOR_P (decl1)
9892 || (DECL_CONSTRUCTOR_P (decl1)
9893 && targetm.cxx.cdtor_returns_this ()))
9895 cdtor_label = build_decl (LABEL_DECL, NULL_TREE, NULL_TREE);
9896 DECL_CONTEXT (cdtor_label) = current_function_decl;
9899 start_fname_decls ();
9901 store_parm_decls (current_function_parms);
9905 /* Like start_preparsed_function, except that instead of a
9906 FUNCTION_DECL, this function takes DECLSPECS and DECLARATOR.
9908 Returns 1 on success. If the DECLARATOR is not suitable for a function
9909 (it defines a datum instead), we return 0, which tells
9910 yyparse to report a parse error. */
9913 start_function (cp_decl_specifier_seq *declspecs,
9914 const cp_declarator *declarator,
9919 if (have_extern_spec)
9921 declspecs->storage_class = sc_extern;
9922 /* This should only be done once on the outermost decl. */
9923 have_extern_spec = false;
9926 decl1 = grokdeclarator (declarator, declspecs, FUNCDEF, 1, &attrs);
9927 /* If the declarator is not suitable for a function definition,
9928 cause a syntax error. */
9929 if (decl1 == NULL_TREE || TREE_CODE (decl1) != FUNCTION_DECL)
9932 cplus_decl_attributes (&decl1, attrs, 0);
9934 /* If #pragma weak was used, mark the decl weak now. */
9935 if (global_scope_p (current_binding_level))
9936 maybe_apply_pragma_weak (decl1);
9938 if (DECL_MAIN_P (decl1))
9940 /* If this doesn't return integer_type, or a typedef to
9941 integer_type, complain. */
9942 if (!same_type_p (TREE_TYPE (TREE_TYPE (decl1)), integer_type_node))
9944 if (pedantic || warn_return_type)
9945 pedwarn ("return type for `main' changed to `int'");
9946 TREE_TYPE (decl1) = default_function_type;
9950 start_preparsed_function (decl1, attrs, /*flags=*/SF_DEFAULT);
9955 /* Store the parameter declarations into the current function declaration.
9956 This is called after parsing the parameter declarations, before
9957 digesting the body of the function.
9959 Also install to binding contour return value identifier, if any. */
9962 store_parm_decls (tree current_function_parms)
9964 tree fndecl = current_function_decl;
9967 /* This is a chain of any other decls that came in among the parm
9968 declarations. If a parm is declared with enum {foo, bar} x;
9969 then CONST_DECLs for foo and bar are put here. */
9970 tree nonparms = NULL_TREE;
9972 if (current_function_parms)
9974 /* This case is when the function was defined with an ANSI prototype.
9975 The parms already have decls, so we need not do anything here
9976 except record them as in effect
9977 and complain if any redundant old-style parm decls were written. */
9979 tree specparms = current_function_parms;
9982 /* Must clear this because it might contain TYPE_DECLs declared
9984 current_binding_level->names = NULL;
9986 /* If we're doing semantic analysis, then we'll call pushdecl
9987 for each of these. We must do them in reverse order so that
9988 they end in the correct forward order. */
9989 specparms = nreverse (specparms);
9991 for (parm = specparms; parm; parm = next)
9993 next = TREE_CHAIN (parm);
9994 if (TREE_CODE (parm) == PARM_DECL)
9996 if (DECL_NAME (parm) == NULL_TREE
9997 || TREE_CODE (parm) != VOID_TYPE)
10000 error ("parameter `%D' declared void", parm);
10004 /* If we find an enum constant or a type tag,
10005 put it aside for the moment. */
10006 TREE_CHAIN (parm) = NULL_TREE;
10007 nonparms = chainon (nonparms, parm);
10011 /* Get the decls in their original chain order and record in the
10012 function. This is all and only the PARM_DECLs that were
10013 pushed into scope by the loop above. */
10014 DECL_ARGUMENTS (fndecl) = getdecls ();
10017 DECL_ARGUMENTS (fndecl) = NULL_TREE;
10019 /* Now store the final chain of decls for the arguments
10020 as the decl-chain of the current lexical scope.
10021 Put the enumerators in as well, at the front so that
10022 DECL_ARGUMENTS is not modified. */
10023 current_binding_level->names = chainon (nonparms, DECL_ARGUMENTS (fndecl));
10025 /* For a cloned function, we've already got all the code we need;
10026 there's no need to add any extra bits. */
10027 if (!DECL_CLONED_FUNCTION_P (fndecl))
10029 /* Do the starting of the exception specifications, if we have any. */
10030 if (flag_exceptions && !processing_template_decl
10031 && flag_enforce_eh_specs
10032 && TYPE_RAISES_EXCEPTIONS (TREE_TYPE (current_function_decl)))
10033 current_eh_spec_block = begin_eh_spec_block ();
10038 /* We have finished doing semantic analysis on DECL, but have not yet
10039 generated RTL for its body. Save away our current state, so that
10040 when we want to generate RTL later we know what to do. */
10043 save_function_data (tree decl)
10045 struct language_function *f;
10047 /* Save the language-specific per-function data so that we can
10048 get it back when we really expand this function. */
10049 my_friendly_assert (!DECL_PENDING_INLINE_P (decl),
10053 f = GGC_NEW (struct language_function);
10054 memcpy (f, cp_function_chain, sizeof (struct language_function));
10055 DECL_SAVED_FUNCTION_DATA (decl) = f;
10057 /* Clear out the bits we don't need. */
10058 f->base.x_stmt_tree.x_cur_stmt_list = NULL_TREE;
10059 f->x_named_label_uses = NULL;
10060 f->bindings = NULL;
10061 f->x_local_names = NULL;
10065 /* Set the return value of the constructor (if present). */
10068 finish_constructor_body (void)
10073 if (targetm.cxx.cdtor_returns_this ())
10075 /* Any return from a constructor will end up here. */
10076 add_stmt (build_stmt (LABEL_EXPR, cdtor_label));
10078 val = DECL_ARGUMENTS (current_function_decl);
10079 val = build2 (MODIFY_EXPR, TREE_TYPE (val),
10080 DECL_RESULT (current_function_decl), val);
10081 /* Return the address of the object. */
10082 exprstmt = build_stmt (RETURN_EXPR, val);
10083 add_stmt (exprstmt);
10087 /* Do all the processing for the beginning of a destructor; set up the
10088 vtable pointers and cleanups for bases and members. */
10091 begin_destructor_body (void)
10094 tree compound_stmt;
10096 /* If the dtor is empty, and we know there is not any possible
10097 way we could use any vtable entries, before they are possibly
10098 set by a base class dtor, we don't have to setup the vtables,
10099 as we know that any base class dtor will set up any vtables
10100 it needs. We avoid MI, because one base class dtor can do a
10101 virtual dispatch to an overridden function that would need to
10102 have a non-related vtable set up, we cannot avoid setting up
10103 vtables in that case. We could change this to see if there
10104 is just one vtable.
10106 ??? In the destructor for a class, the vtables are set
10107 appropriately for that class. There will be no non-related
10108 vtables. jason 2001-12-11. */
10109 if_stmt = begin_if_stmt ();
10111 /* If it is not safe to avoid setting up the vtables, then
10112 someone will change the condition to be boolean_true_node.
10113 (Actually, for now, we do not have code to set the condition
10114 appropriately, so we just assume that we always need to
10115 initialize the vtables.) */
10116 finish_if_stmt_cond (boolean_true_node, if_stmt);
10118 compound_stmt = begin_compound_stmt (0);
10120 /* Make all virtual function table pointers in non-virtual base
10121 classes point to CURRENT_CLASS_TYPE's virtual function
10123 initialize_vtbl_ptrs (current_class_ptr);
10125 finish_compound_stmt (compound_stmt);
10126 finish_then_clause (if_stmt);
10127 finish_if_stmt (if_stmt);
10129 /* And insert cleanups for our bases and members so that they
10130 will be properly destroyed if we throw. */
10131 push_base_cleanups ();
10134 /* At the end of every destructor we generate code to delete the object if
10135 necessary. Do that now. */
10138 finish_destructor_body (void)
10142 /* Any return from a destructor will end up here; that way all base
10143 and member cleanups will be run when the function returns. */
10144 add_stmt (build_stmt (LABEL_EXPR, cdtor_label));
10146 /* In a virtual destructor, we must call delete. */
10147 if (DECL_VIRTUAL_P (current_function_decl))
10150 tree virtual_size = cxx_sizeof (current_class_type);
10154 At the point of definition of a virtual destructor (including
10155 an implicit definition), non-placement operator delete shall
10156 be looked up in the scope of the destructor's class and if
10157 found shall be accessible and unambiguous. */
10158 exprstmt = build_op_delete_call
10159 (DELETE_EXPR, current_class_ptr, virtual_size,
10160 /*global_p=*/false, NULL_TREE);
10162 if_stmt = begin_if_stmt ();
10163 finish_if_stmt_cond (build2 (BIT_AND_EXPR, integer_type_node,
10164 current_in_charge_parm,
10167 finish_expr_stmt (exprstmt);
10168 finish_then_clause (if_stmt);
10169 finish_if_stmt (if_stmt);
10172 if (targetm.cxx.cdtor_returns_this ())
10176 val = DECL_ARGUMENTS (current_function_decl);
10177 val = build2 (MODIFY_EXPR, TREE_TYPE (val),
10178 DECL_RESULT (current_function_decl), val);
10179 /* Return the address of the object. */
10180 exprstmt = build_stmt (RETURN_EXPR, val);
10181 add_stmt (exprstmt);
10185 /* Do the necessary processing for the beginning of a function body, which
10186 in this case includes member-initializers, but not the catch clauses of
10187 a function-try-block. Currently, this means opening a binding level
10188 for the member-initializers (in a ctor) and member cleanups (in a dtor).
10189 In other functions, this isn't necessary, but it doesn't hurt. */
10192 begin_function_body (void)
10196 if (processing_template_decl)
10197 /* Do nothing now. */;
10199 /* Always keep the BLOCK node associated with the outermost pair of
10200 curly braces of a function. These are needed for correct
10201 operation of dwarfout.c. */
10202 keep_next_level (true);
10204 stmt = begin_compound_stmt (BCS_FN_BODY);
10206 if (processing_template_decl)
10207 /* Do nothing now. */;
10208 else if (DECL_DESTRUCTOR_P (current_function_decl))
10209 begin_destructor_body ();
10214 /* Do the processing for the end of a function body. Currently, this means
10215 closing out the cleanups for fully-constructed bases and members, and in
10216 the case of the destructor, deleting the object if desired. Again, this
10217 is only meaningful for [cd]tors, since they are the only functions where
10218 there is a significant distinction between the main body and any
10219 function catch clauses. Handling, say, main() return semantics here
10220 would be wrong, as flowing off the end of a function catch clause for
10221 main() would also need to return 0. */
10224 finish_function_body (tree compstmt)
10226 /* Close the block. */
10227 finish_compound_stmt (compstmt);
10229 if (processing_template_decl)
10230 /* Do nothing now. */;
10231 else if (DECL_CONSTRUCTOR_P (current_function_decl))
10232 finish_constructor_body ();
10233 else if (DECL_DESTRUCTOR_P (current_function_decl))
10234 finish_destructor_body ();
10237 /* Finish up a function declaration and compile that function
10238 all the way to assembler language output. The free the storage
10239 for the function definition.
10241 FLAGS is a bitwise or of the following values:
10243 We just finished processing the body of an in-class inline
10244 function definition. (This processing will have taken place
10245 after the class definition is complete.) */
10248 finish_function (int flags)
10250 tree fndecl = current_function_decl;
10251 tree fntype, ctype = NULL_TREE;
10252 int inclass_inline = (flags & 2) != 0;
10255 /* When we get some parse errors, we can end up without a
10256 current_function_decl, so cope. */
10257 if (fndecl == NULL_TREE)
10258 return error_mark_node;
10260 if (DECL_NONSTATIC_MEMBER_FUNCTION_P (fndecl)
10261 && DECL_VIRTUAL_P (fndecl)
10262 && !processing_template_decl)
10264 tree fnclass = DECL_CONTEXT (fndecl);
10265 if (fndecl == CLASSTYPE_KEY_METHOD (fnclass))
10266 keyed_classes = tree_cons (NULL_TREE, fnclass, keyed_classes);
10269 nested = function_depth > 1;
10270 fntype = TREE_TYPE (fndecl);
10272 /* TREE_READONLY (fndecl) = 1;
10273 This caused &foo to be of type ptr-to-const-function
10274 which then got a warning when stored in a ptr-to-function variable. */
10276 my_friendly_assert (building_stmt_tree (), 20000911);
10278 /* For a cloned function, we've already got all the code we need;
10279 there's no need to add any extra bits. */
10280 if (!DECL_CLONED_FUNCTION_P (fndecl))
10282 if (DECL_MAIN_P (current_function_decl))
10284 /* Make it so that `main' always returns 0 by default. */
10286 finish_return_stmt (integer_one_node);
10288 finish_return_stmt (integer_zero_node);
10292 /* Finish dealing with exception specifiers. */
10293 if (flag_exceptions && !processing_template_decl
10294 && flag_enforce_eh_specs
10295 && TYPE_RAISES_EXCEPTIONS (TREE_TYPE (current_function_decl)))
10296 finish_eh_spec_block (TYPE_RAISES_EXCEPTIONS
10297 (TREE_TYPE (current_function_decl)),
10298 current_eh_spec_block);
10301 /* If we're saving up tree structure, tie off the function now. */
10302 DECL_SAVED_TREE (fndecl) = pop_stmt_list (DECL_SAVED_TREE (fndecl));
10304 finish_fname_decls ();
10306 /* If this function can't throw any exceptions, remember that. */
10307 if (!processing_template_decl
10308 && !cp_function_chain->can_throw
10309 && !flag_non_call_exceptions)
10310 TREE_NOTHROW (fndecl) = 1;
10312 /* This must come after expand_function_end because cleanups might
10313 have declarations (from inline functions) that need to go into
10314 this function's blocks. */
10316 /* If the current binding level isn't the outermost binding level
10317 for this function, either there is a bug, or we have experienced
10318 syntax errors and the statement tree is malformed. */
10319 if (current_binding_level->kind != sk_function_parms)
10321 /* Make sure we have already experienced errors. */
10322 if (errorcount == 0)
10325 /* Throw away the broken statement tree and extra binding
10327 DECL_SAVED_TREE (fndecl) = alloc_stmt_list ();
10329 while (current_binding_level->kind != sk_function_parms)
10331 if (current_binding_level->kind == sk_class)
10332 pop_nested_class ();
10334 poplevel (0, 0, 0);
10337 poplevel (1, 0, 1);
10339 /* Statements should always be full-expressions at the outermost set
10340 of curly braces for a function. */
10341 my_friendly_assert (stmts_are_full_exprs_p (), 19990831);
10343 /* Set up the named return value optimization, if we can. Candidate
10344 variables are selected in check_return_value. */
10345 if (current_function_return_value)
10347 tree r = current_function_return_value;
10350 if (r != error_mark_node
10351 /* This is only worth doing for fns that return in memory--and
10352 simpler, since we don't have to worry about promoted modes. */
10353 && aggregate_value_p (TREE_TYPE (TREE_TYPE (fndecl)), fndecl)
10354 /* Only allow this for variables declared in the outer scope of
10355 the function so we know that their lifetime always ends with a
10356 return; see g++.dg/opt/nrv6.C. We could be more flexible if
10357 we were to do this optimization in tree-ssa. */
10358 && (outer = BLOCK_SUBBLOCKS (DECL_INITIAL (fndecl)))
10359 /* Skip the artificial function body block. */
10360 && (outer = BLOCK_SUBBLOCKS (outer))
10361 && chain_member (r, BLOCK_VARS (outer)))
10362 finalize_nrv (&DECL_SAVED_TREE (fndecl), r, DECL_RESULT (fndecl));
10364 current_function_return_value = NULL_TREE;
10367 /* Remember that we were in class scope. */
10368 if (current_class_name)
10369 ctype = current_class_type;
10371 /* Must mark the RESULT_DECL as being in this function. */
10372 DECL_CONTEXT (DECL_RESULT (fndecl)) = fndecl;
10374 /* Set the BLOCK_SUPERCONTEXT of the outermost function scope to point
10375 to the FUNCTION_DECL node itself. */
10376 BLOCK_SUPERCONTEXT (DECL_INITIAL (fndecl)) = fndecl;
10378 /* Save away current state, if appropriate. */
10379 if (!processing_template_decl)
10380 save_function_data (fndecl);
10382 /* Complain if there's just no return statement. */
10383 if (warn_return_type
10384 && TREE_CODE (TREE_TYPE (fntype)) != VOID_TYPE
10385 && !dependent_type_p (TREE_TYPE (fntype))
10386 && !current_function_returns_value && !current_function_returns_null
10387 /* Don't complain if we abort or throw. */
10388 && !current_function_returns_abnormally
10389 && !DECL_NAME (DECL_RESULT (fndecl))
10390 /* Normally, with -Wreturn-type, flow will complain. Unless we're an
10391 inline function, as we might never be compiled separately. */
10392 && (DECL_INLINE (fndecl) || processing_template_decl)
10393 /* Structor return values (if any) are set by the compiler. */
10394 && !DECL_CONSTRUCTOR_P (fndecl)
10395 && !DECL_DESTRUCTOR_P (fndecl))
10396 warning ("no return statement in function returning non-void");
10398 /* Store the end of the function, so that we get good line number
10399 info for the epilogue. */
10400 cfun->function_end_locus = input_location;
10402 /* Genericize before inlining. */
10403 if (!processing_template_decl)
10405 cp_genericize (fndecl);
10407 /* Handle attribute((warn_unused_result)). Relies on gimple input. */
10408 c_warn_unused_result (&DECL_SAVED_TREE (fndecl));
10411 /* We're leaving the context of this function, so zap cfun. It's still in
10412 DECL_STRUCT_FUNCTION, and we'll restore it in tree_rest_of_compilation. */
10414 current_function_decl = NULL;
10416 /* If this is an in-class inline definition, we may have to pop the
10417 bindings for the template parameters that we added in
10418 maybe_begin_member_template_processing when start_function was
10420 if (inclass_inline)
10421 maybe_end_member_template_processing ();
10423 /* Leave the scope of the class. */
10425 pop_nested_class ();
10431 /* Let the error reporting routines know that we're outside a
10432 function. For a nested function, this value is used in
10433 cxx_pop_function_context and then reset via pop_function_context. */
10434 current_function_decl = NULL_TREE;
10439 /* Create the FUNCTION_DECL for a function definition.
10440 DECLSPECS and DECLARATOR are the parts of the declaration;
10441 they describe the return type and the name of the function,
10442 but twisted together in a fashion that parallels the syntax of C.
10444 This function creates a binding context for the function body
10445 as well as setting up the FUNCTION_DECL in current_function_decl.
10447 Returns a FUNCTION_DECL on success.
10449 If the DECLARATOR is not suitable for a function (it defines a datum
10450 instead), we return 0, which tells yyparse to report a parse error.
10452 May return void_type_node indicating that this method is actually
10453 a friend. See grokfield for more details.
10455 Came here with a `.pushlevel' .
10457 DO NOT MAKE ANY CHANGES TO THIS CODE WITHOUT MAKING CORRESPONDING
10458 CHANGES TO CODE IN `grokfield'. */
10461 start_method (cp_decl_specifier_seq *declspecs,
10462 const cp_declarator *declarator, tree attrlist)
10464 tree fndecl = grokdeclarator (declarator, declspecs, MEMFUNCDEF, 0,
10467 if (fndecl == error_mark_node)
10468 return error_mark_node;
10470 if (fndecl == NULL || TREE_CODE (fndecl) != FUNCTION_DECL)
10472 error ("invalid member function declaration");
10473 return error_mark_node;
10477 cplus_decl_attributes (&fndecl, attrlist, 0);
10479 /* Pass friends other than inline friend functions back. */
10480 if (fndecl == void_type_node)
10483 if (DECL_IN_AGGR_P (fndecl))
10485 if (DECL_CONTEXT (fndecl)
10486 && TREE_CODE( DECL_CONTEXT (fndecl)) != NAMESPACE_DECL)
10487 error ("`%D' is already defined in class `%T'", fndecl,
10488 DECL_CONTEXT (fndecl));
10489 return void_type_node;
10492 check_template_shadow (fndecl);
10494 DECL_DECLARED_INLINE_P (fndecl) = 1;
10495 if (flag_default_inline)
10496 DECL_INLINE (fndecl) = 1;
10498 /* We process method specializations in finish_struct_1. */
10499 if (processing_template_decl && !DECL_TEMPLATE_SPECIALIZATION (fndecl))
10501 fndecl = push_template_decl (fndecl);
10502 if (fndecl == error_mark_node)
10506 if (! DECL_FRIEND_P (fndecl))
10508 if (TREE_CHAIN (fndecl))
10510 fndecl = copy_node (fndecl);
10511 TREE_CHAIN (fndecl) = NULL_TREE;
10513 grok_special_member_properties (fndecl);
10516 cp_finish_decl (fndecl, NULL_TREE, NULL_TREE, 0);
10518 /* Make a place for the parms. */
10519 begin_scope (sk_function_parms, fndecl);
10521 DECL_IN_AGGR_P (fndecl) = 1;
10525 /* Go through the motions of finishing a function definition.
10526 We don't compile this method until after the whole class has
10529 FINISH_METHOD must return something that looks as though it
10530 came from GROKFIELD (since we are defining a method, after all).
10532 This is called after parsing the body of the function definition.
10533 STMTS is the chain of statements that makes up the function body.
10535 DECL is the ..._DECL that `start_method' provided. */
10538 finish_method (tree decl)
10540 tree fndecl = decl;
10545 if (decl == void_type_node)
10548 old_initial = DECL_INITIAL (fndecl);
10550 /* Undo the level for the parms (from start_method).
10551 This is like poplevel, but it causes nothing to be
10552 saved. Saving information here confuses symbol-table
10553 output routines. Besides, this information will
10554 be correctly output when this method is actually
10557 /* Clear out the meanings of the local variables of this level;
10558 also record in each decl which block it belongs to. */
10560 for (link = current_binding_level->names; link; link = TREE_CHAIN (link))
10562 if (DECL_NAME (link) != NULL_TREE)
10563 pop_binding (DECL_NAME (link), link);
10564 my_friendly_assert (TREE_CODE (link) != FUNCTION_DECL, 163);
10565 DECL_CONTEXT (link) = NULL_TREE;
10568 poplevel (0, 0, 0);
10570 DECL_INITIAL (fndecl) = old_initial;
10572 /* We used to check if the context of FNDECL was different from
10573 current_class_type as another way to get inside here. This didn't work
10574 for String.cc in libg++. */
10575 if (DECL_FRIEND_P (fndecl))
10577 CLASSTYPE_INLINE_FRIENDS (current_class_type)
10578 = tree_cons (NULL_TREE, fndecl, CLASSTYPE_INLINE_FRIENDS (current_class_type));
10579 decl = void_type_node;
10586 /* VAR is a VAR_DECL. If its type is incomplete, remember VAR so that
10587 we can lay it out later, when and if its type becomes complete. */
10590 maybe_register_incomplete_var (tree var)
10592 my_friendly_assert (TREE_CODE (var) == VAR_DECL, 20020406);
10594 /* Keep track of variables with incomplete types. */
10595 if (!processing_template_decl && TREE_TYPE (var) != error_mark_node
10596 && DECL_EXTERNAL (var))
10598 tree inner_type = TREE_TYPE (var);
10600 while (TREE_CODE (inner_type) == ARRAY_TYPE)
10601 inner_type = TREE_TYPE (inner_type);
10602 inner_type = TYPE_MAIN_VARIANT (inner_type);
10604 if ((!COMPLETE_TYPE_P (inner_type) && CLASS_TYPE_P (inner_type))
10605 /* RTTI TD entries are created while defining the type_info. */
10606 || (TYPE_LANG_SPECIFIC (inner_type)
10607 && TYPE_BEING_DEFINED (inner_type)))
10608 incomplete_vars = tree_cons (inner_type, var, incomplete_vars);
10612 /* Called when a class type (given by TYPE) is defined. If there are
10613 any existing VAR_DECLs whose type hsa been completed by this
10614 declaration, update them now. */
10617 complete_vars (tree type)
10619 tree *list = &incomplete_vars;
10621 my_friendly_assert (CLASS_TYPE_P (type), 20020406);
10624 if (same_type_p (type, TREE_PURPOSE (*list)))
10626 tree var = TREE_VALUE (*list);
10627 /* Complete the type of the variable. The VAR_DECL itself
10628 will be laid out in expand_expr. */
10629 complete_type (TREE_TYPE (var));
10630 /* Remove this entry from the list. */
10631 *list = TREE_CHAIN (*list);
10634 list = &TREE_CHAIN (*list);
10637 /* Check for pending declarations which may have abstract type. */
10638 complete_type_check_abstract (type);
10641 /* If DECL is of a type which needs a cleanup, build that cleanup
10645 cxx_maybe_build_cleanup (tree decl)
10647 tree type = TREE_TYPE (decl);
10649 if (type != error_mark_node && TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type))
10651 int flags = LOOKUP_NORMAL|LOOKUP_DESTRUCTOR;
10654 if (TREE_CODE (type) == ARRAY_TYPE)
10658 cxx_mark_addressable (decl);
10659 rval = build_unary_op (ADDR_EXPR, decl, 0);
10662 /* Optimize for space over speed here. */
10663 if (! TYPE_USES_VIRTUAL_BASECLASSES (type)
10664 || flag_expensive_optimizations)
10665 flags |= LOOKUP_NONVIRTUAL;
10667 rval = build_delete (TREE_TYPE (rval), rval,
10668 sfk_complete_destructor, flags, 0);
10670 if (TYPE_USES_VIRTUAL_BASECLASSES (type)
10671 && ! TYPE_HAS_DESTRUCTOR (type))
10672 rval = build_compound_expr (rval, build_vbase_delete (type, decl));
10679 /* When a stmt has been parsed, this function is called. */
10686 /* DECL was originally constructed as a non-static member function,
10687 but turned out to be static. Update it accordingly. */
10690 revert_static_member_fn (tree decl)
10693 tree function = TREE_TYPE (decl);
10694 tree args = TYPE_ARG_TYPES (function);
10696 if (cp_type_quals (TREE_TYPE (TREE_VALUE (args)))
10697 != TYPE_UNQUALIFIED)
10698 error ("static member function `%#D' declared with type qualifiers",
10701 args = TREE_CHAIN (args);
10702 tmp = build_function_type (TREE_TYPE (function), args);
10703 tmp = build_qualified_type (tmp, cp_type_quals (function));
10704 tmp = build_exception_variant (tmp,
10705 TYPE_RAISES_EXCEPTIONS (function));
10706 TREE_TYPE (decl) = tmp;
10707 if (DECL_ARGUMENTS (decl))
10708 DECL_ARGUMENTS (decl) = TREE_CHAIN (DECL_ARGUMENTS (decl));
10709 DECL_STATIC_FUNCTION_P (decl) = 1;
10712 /* Initialize the variables used during compilation of a C++
10716 cxx_push_function_context (struct function * f)
10718 struct language_function *p = GGC_CNEW (struct language_function);
10721 /* Whenever we start a new function, we destroy temporaries in the
10723 current_stmt_tree ()->stmts_are_full_exprs_p = 1;
10729 if (DECL_SAVED_FUNCTION_DATA (fn))
10731 /* If we already parsed this function, and we're just expanding it
10732 now, restore saved state. */
10733 *cp_function_chain = *DECL_SAVED_FUNCTION_DATA (fn);
10735 /* We don't need the saved data anymore. Unless this is an inline
10736 function; we need the named return value info for
10737 declare_return_variable. */
10738 if (! DECL_INLINE (fn))
10739 DECL_SAVED_FUNCTION_DATA (fn) = NULL;
10744 /* Free the language-specific parts of F, now that we've finished
10745 compiling the function. */
10748 cxx_pop_function_context (struct function * f)
10753 /* Return which tree structure is used by T, or TS_CP_GENERIC if T is
10754 one of the language-independent trees. */
10756 enum cp_tree_node_structure_enum
10757 cp_tree_node_structure (union lang_tree_node * t)
10759 switch (TREE_CODE (&t->generic))
10761 case DEFAULT_ARG: return TS_CP_DEFAULT_ARG;
10762 case IDENTIFIER_NODE: return TS_CP_IDENTIFIER;
10763 case OVERLOAD: return TS_CP_OVERLOAD;
10764 case TEMPLATE_PARM_INDEX: return TS_CP_TPI;
10765 case TINST_LEVEL: return TS_CP_TINST_LEVEL;
10766 case PTRMEM_CST: return TS_CP_PTRMEM;
10767 case BASELINK: return TS_CP_BASELINK;
10768 default: return TS_CP_GENERIC;
10772 /* Build the void_list_node (void_type_node having been created). */
10774 build_void_list_node (void)
10776 tree t = build_tree_list (NULL_TREE, void_type_node);
10781 cp_missing_noreturn_ok_p (tree decl)
10783 /* A missing noreturn is ok for the `main' function. */
10784 return DECL_MAIN_P (decl);
10787 #include "gt-cp-decl.h"
10788 #include "gtype-cp.h"