1 /* Process declarations and variables for C compiler.
2 Copyright (C) 1988, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000
3 Free Software Foundation, Inc.
4 Contributed by Michael Tiemann (tiemann@cygnus.com)
6 This file is part of GNU CC.
8 GNU CC 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 GNU CC 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 GNU CC; 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. */
47 extern int current_class_depth;
49 extern tree global_namespace;
51 extern int (*valid_lang_attribute) PARAMS ((tree, tree, tree, tree));
53 #ifndef BOOL_TYPE_SIZE
54 #ifdef SLOW_BYTE_ACCESS
55 /* In the new ABI, `bool' has size and alignment `1', on all
57 #define BOOL_TYPE_SIZE \
58 ((SLOW_BYTE_ACCESS && !flag_new_abi) ? (POINTER_SIZE) : (CHAR_TYPE_SIZE))
60 #define BOOL_TYPE_SIZE CHAR_TYPE_SIZE
64 /* We let tm.h override the types used here, to handle trivial differences
65 such as the choice of unsigned int or long unsigned int for size_t.
66 When machines start needing nontrivial differences in the size type,
67 it would be best to do something here to figure out automatically
68 from other information what type to use. */
71 #define SIZE_TYPE "long unsigned int"
75 #define PTRDIFF_TYPE "long int"
79 #define WCHAR_TYPE "int"
83 #define WINT_TYPE "unsigned int"
87 #define INTMAX_TYPE ((INT_TYPE_SIZE == LONG_LONG_TYPE_SIZE) \
89 : ((LONG_TYPE_SIZE == LONG_LONG_TYPE_SIZE) \
95 #define UINTMAX_TYPE ((INT_TYPE_SIZE == LONG_LONG_TYPE_SIZE) \
97 : ((LONG_TYPE_SIZE == LONG_LONG_TYPE_SIZE) \
98 ? "long unsigned int" \
99 : "long long unsigned int"))
102 static tree grokparms PARAMS ((tree, int));
103 static const char *redeclaration_error_message PARAMS ((tree, tree));
105 static void push_binding_level PARAMS ((struct binding_level *, int,
107 static void pop_binding_level PARAMS ((void));
108 static void suspend_binding_level PARAMS ((void));
109 static void resume_binding_level PARAMS ((struct binding_level *));
110 static struct binding_level *make_binding_level PARAMS ((void));
111 static void declare_namespace_level PARAMS ((void));
112 static int decl_jump_unsafe PARAMS ((tree));
113 static void storedecls PARAMS ((tree));
114 static void require_complete_types_for_parms PARAMS ((tree));
115 static int ambi_op_p PARAMS ((enum tree_code));
116 static int unary_op_p PARAMS ((enum tree_code));
117 static tree store_bindings PARAMS ((tree, tree));
118 static tree lookup_tag_reverse PARAMS ((tree, tree));
119 static tree obscure_complex_init PARAMS ((tree, tree));
120 static tree lookup_name_real PARAMS ((tree, int, int, int));
121 static void warn_extern_redeclared_static PARAMS ((tree, tree));
122 static void grok_reference_init PARAMS ((tree, tree, tree));
123 static tree grokfndecl PARAMS ((tree, tree, tree, tree, int,
124 enum overload_flags, tree,
125 tree, int, int, int, int, int, int, tree));
126 static tree grokvardecl PARAMS ((tree, tree, RID_BIT_TYPE *, int, int, tree));
127 static tree lookup_tag PARAMS ((enum tree_code, tree,
128 struct binding_level *, int));
129 static void set_identifier_type_value_with_scope
130 PARAMS ((tree, tree, struct binding_level *));
131 static void record_builtin_type PARAMS ((enum rid, const char *, tree));
132 static void record_unknown_type PARAMS ((tree, const char *));
133 static tree build_library_fn_1 PARAMS ((tree, enum tree_code, tree));
134 static int member_function_or_else PARAMS ((tree, tree, enum overload_flags));
135 static void bad_specifiers PARAMS ((tree, const char *, int, int, int, int,
137 static tree maybe_process_template_type_declaration PARAMS ((tree, int, struct binding_level*));
138 static void check_for_uninitialized_const_var PARAMS ((tree));
139 static unsigned long typename_hash PARAMS ((hash_table_key));
140 static boolean typename_compare PARAMS ((hash_table_key, hash_table_key));
141 static void push_binding PARAMS ((tree, tree, struct binding_level*));
142 static int add_binding PARAMS ((tree, tree));
143 static void pop_binding PARAMS ((tree, tree));
144 static tree local_variable_p_walkfn PARAMS ((tree *, int *, void *));
145 static tree find_binding PARAMS ((tree, tree));
146 static tree select_decl PARAMS ((tree, int));
147 static int lookup_flags PARAMS ((int, int));
148 static tree qualify_lookup PARAMS ((tree, int));
149 static tree record_builtin_java_type PARAMS ((const char *, int));
150 static const char *tag_name PARAMS ((enum tag_types code));
151 static void find_class_binding_level PARAMS ((void));
152 static struct binding_level *innermost_nonclass_level PARAMS ((void));
153 static void warn_about_implicit_typename_lookup PARAMS ((tree, tree));
154 static int walk_namespaces_r PARAMS ((tree, walk_namespaces_fn, void *));
155 static int walk_globals_r PARAMS ((tree, void *));
156 static void add_decl_to_level PARAMS ((tree, struct binding_level *));
157 static tree make_label_decl PARAMS ((tree, int));
158 static void use_label PARAMS ((tree));
159 static void check_previous_goto_1 PARAMS ((tree, struct binding_level *, tree,
161 static void check_previous_goto PARAMS ((struct named_label_use_list *));
162 static void check_switch_goto PARAMS ((struct binding_level *));
163 static void check_previous_gotos PARAMS ((tree));
164 static void pop_label PARAMS ((tree, tree));
165 static void pop_labels PARAMS ((tree));
166 static void maybe_deduce_size_from_array_init PARAMS ((tree, tree));
167 static void layout_var_decl PARAMS ((tree));
168 static void maybe_commonize_var PARAMS ((tree));
169 static tree check_initializer PARAMS ((tree, tree));
170 static void make_rtl_for_nonlocal_decl PARAMS ((tree, tree, const char *));
171 static void push_cp_function_context PARAMS ((struct function *));
172 static void pop_cp_function_context PARAMS ((struct function *));
173 static void mark_binding_level PARAMS ((void *));
174 static void mark_named_label_lists PARAMS ((void *, void *));
175 static void mark_cp_function_context PARAMS ((struct function *));
176 static void mark_saved_scope PARAMS ((void *));
177 static void mark_lang_function PARAMS ((struct cp_language_function *));
178 static void save_function_data PARAMS ((tree));
179 static void check_function_type PARAMS ((tree, tree));
180 static void destroy_local_var PARAMS ((tree));
181 static void finish_constructor_body PARAMS ((void));
182 static void finish_destructor_body PARAMS ((void));
183 static tree create_array_type_for_decl PARAMS ((tree, tree, tree));
184 static tree get_atexit_node PARAMS ((void));
185 static tree get_dso_handle_node PARAMS ((void));
186 static tree start_cleanup_fn PARAMS ((void));
187 static void end_cleanup_fn PARAMS ((void));
188 static tree cp_make_fname_decl PARAMS ((tree, const char *, int));
189 static void initialize_predefined_identifiers PARAMS ((void));
190 static tree check_special_function_return_type
191 PARAMS ((special_function_kind, tree, tree, tree));
192 static tree push_cp_library_fn PARAMS ((enum tree_code, tree));
193 static tree build_cp_library_fn PARAMS ((tree, enum tree_code, tree));
194 static void store_parm_decls PARAMS ((tree));
196 #if defined (DEBUG_CP_BINDING_LEVELS)
197 static void indent PARAMS ((void));
200 /* Erroneous argument lists can use this *IFF* they do not modify it. */
201 tree error_mark_list;
203 /* The following symbols are subsumed in the cp_global_trees array, and
204 listed here individually for documentation purposes.
207 tree wchar_decl_node;
209 tree vtable_entry_type;
210 tree delta_type_node;
213 tree __baselist_desc_type_node;
214 tree __i_desc_type_node, __m_desc_type_node;
215 tree __t_desc_array_type, __i_desc_array_type, __m_desc_array_type;
217 tree __t_desc_type_node;
219 tree __tp_desc_type_node;
221 tree ti_desc_type_node;
222 tree bltn_desc_type_node, ptr_desc_type_node;
223 tree ary_desc_type_node, func_desc_type_node, enum_desc_type_node;
224 tree class_desc_type_node, si_class_desc_type_node, vmi_class_desc_type_node;
225 tree ptm_desc_type_node;
226 tree base_desc_type_node;
228 Not needed yet? May be needed one day?
229 tree __bltn_desc_array_type, __user_desc_array_type, __class_desc_array_type;
230 tree __ptr_desc_array_type, __attr_dec_array_type, __func_desc_array_type;
231 tree __ptmf_desc_array_type, __ptmd_desc_array_type;
234 tree class_type_node, record_type_node, union_type_node, enum_type_node;
235 tree unknown_type_node;
237 Array type `vtable_entry_type[]'
240 tree vtbl_ptr_type_node;
247 A FUNCTION_DECL which can call `abort'. Not necessarily the
248 one that the user will declare, but sufficient to be called
249 by routines that want to abort the program.
253 The FUNCTION_DECL for the default `::operator delete'.
255 tree global_delete_fndecl;
258 tree type_info_type_node, tinfo_decl_id, tinfo_decl_type;
263 tree cp_global_trees[CPTI_MAX];
265 /* Indicates that there is a type value in some namespace, although
266 that is not necessarily in scope at the moment. */
268 static tree global_type_node;
270 /* If non-zero, this is the number of times we have entered the `std'
271 namespace when we are treating that namespace as an alias for the
273 static int in_fake_std;
275 /* Expect only namespace names now. */
276 static int only_namespace_names;
278 /* Used only for jumps to as-yet undefined labels, since jumps to
279 defined labels can have their validity checked immediately. */
281 struct named_label_use_list
283 struct binding_level *binding_level;
286 const char *filename_o_goto;
288 struct named_label_use_list *next;
291 #define named_label_uses cp_function_chain->x_named_label_uses
293 /* A list of objects which have constructors or destructors
294 which reside in the global scope. The decl is stored in
295 the TREE_VALUE slot and the initializer is stored
296 in the TREE_PURPOSE slot. */
297 tree static_aggregates;
301 /* A node for the integer constants 2, and 3. */
303 tree integer_two_node, integer_three_node;
305 /* Parsing a function declarator leaves here a chain of structure
306 and enum types declared in the parmlist. */
308 static tree last_function_parm_tags;
310 /* Similar, for last_function_parm_tags. */
311 tree last_function_parms;
312 static tree current_function_parm_tags;
314 /* A list of all LABEL_DECLs in the function that have names. Here so
315 we can clear out their names' definitions at the end of the
316 function, and so we can check the validity of jumps to these labels. */
318 struct named_label_list
320 struct binding_level *binding_level;
326 struct named_label_list *next;
329 #define named_labels cp_function_chain->x_named_labels
331 /* Set to 0 at beginning of a function definition, and whenever
332 a label (case or named) is defined. Set to value of expression
333 returned from function when that value can be transformed into
334 a named return value. */
336 tree current_function_return_value;
338 /* Nonzero means use the ISO C94 dialect of C. */
342 /* Nonzero means use the ISO C99 dialect of C. */
346 /* Nonzero means we are a hosted implementation for code shared with C. */
350 /* Nonzero means add default format_arg attributes for functions not
353 int flag_noniso_default_format_attributes = 1;
355 /* Nonzero means give `double' the same size as `float'. */
357 extern int flag_short_double;
359 /* Nonzero if we want to conserve space in the .o files. We do this
360 by putting uninitialized data and runtime initialized data into
361 .common instead of .data at the expense of not flagging multiple
363 extern int flag_conserve_space;
365 /* C and C++ flags are in decl2.c. */
367 /* Flag used when debugging spew.c */
369 extern int spew_debug;
371 /* A expression of value 0 with the same precision as a sizetype
373 tree signed_size_zero_node;
375 /* The name of the anonymous namespace, throughout this translation
377 tree anonymous_namespace_name;
379 /* The number of function bodies which we are currently processing.
380 (Zero if we are at namespace scope, one inside the body of a
381 function, two inside the body of a function in a local class, etc.) */
384 /* For each binding contour we allocate a binding_level structure
385 which records the names defined in that contour.
388 1) one for each function definition,
389 where internal declarations of the parameters appear.
390 2) one for each compound statement,
391 to record its declarations.
393 The current meaning of a name can be found by searching the levels
394 from the current one out to the global one.
396 Off to the side, may be the class_binding_level. This exists only
397 to catch class-local declarations. It is otherwise nonexistent.
399 Also there may be binding levels that catch cleanups that must be
400 run when exceptions occur. Thus, to see whether a name is bound in
401 the current scope, it is not enough to look in the
402 CURRENT_BINDING_LEVEL. You should use lookup_name_current_level
405 /* Note that the information in the `names' component of the global contour
406 is duplicated in the IDENTIFIER_GLOBAL_VALUEs of all identifiers. */
410 /* A chain of _DECL nodes for all variables, constants, functions,
411 and typedef types. These are in the reverse of the order
412 supplied. There may be OVERLOADs on this list, too, but they
413 are wrapped in TREE_LISTs; the TREE_VALUE is the OVERLOAD. */
416 /* A list of structure, union and enum definitions, for looking up
418 It is a chain of TREE_LIST nodes, each of whose TREE_PURPOSE is a name,
419 or NULL_TREE; and whose TREE_VALUE is a RECORD_TYPE, UNION_TYPE,
420 or ENUMERAL_TYPE node.
422 C++: the TREE_VALUE nodes can be simple types for
423 component_bindings. */
426 /* A list of USING_DECL nodes. */
429 /* A list of used namespaces. PURPOSE is the namespace,
430 VALUE the common ancestor with this binding_level's namespace. */
431 tree using_directives;
433 /* If this binding level is the binding level for a class, then
434 class_shadowed is a TREE_LIST. The TREE_PURPOSE of each node
435 is the name of an entity bound in the class; the TREE_VALUE is
436 the IDENTIFIER_CLASS_VALUE before we entered the class. Thus,
437 when leaving class scope, we can restore the
438 IDENTIFIER_CLASS_VALUE by walking this list. The TREE_TYPE is
439 the DECL bound by this name in the class. */
442 /* Similar to class_shadowed, but for IDENTIFIER_TYPE_VALUE, and
443 is used for all binding levels. */
446 /* A TREE_LIST. Each TREE_VALUE is the LABEL_DECL for a local
447 label in this scope. The TREE_PURPOSE is the previous value of
448 the IDENTIFIER_LABEL VALUE. */
449 tree shadowed_labels;
451 /* For each level (except not the global one),
452 a chain of BLOCK nodes for all the levels
453 that were entered and exited one level down. */
456 /* The _TYPE node for this level, if parm_flag == 2. */
459 /* The binding level which this one is contained in (inherits from). */
460 struct binding_level *level_chain;
462 /* List of decls in `names' that have incomplete
463 structure or union types. */
466 /* List of VAR_DECLS saved from a previous for statement.
467 These would be dead in ISO-conforming code, but might
468 be referenced in ARM-era code. These are stored in a
469 TREE_LIST; the TREE_VALUE is the actual declaration. */
470 tree dead_vars_from_for;
472 /* 1 for the level that holds the parameters of a function.
473 2 for the level that holds a class declaration. */
474 unsigned parm_flag : 2;
476 /* 1 means make a BLOCK for this level regardless of all else.
477 2 for temporary binding contours created by the compiler. */
480 /* Nonzero if this level "doesn't exist" for tags. */
481 unsigned tag_transparent : 1;
483 /* Nonzero if this level can safely have additional
484 cleanup-needing variables added to it. */
485 unsigned more_cleanups_ok : 1;
486 unsigned have_cleanups : 1;
488 /* Nonzero if this scope is for storing the decls for template
489 parameters and generic decls; these decls will be discarded and
490 replaced with a TEMPLATE_DECL. */
491 unsigned template_parms_p : 1;
493 /* Nonzero if this scope corresponds to the `<>' in a
494 `template <>' clause. Whenever this flag is set,
495 TEMPLATE_PARMS_P will be set as well. */
496 unsigned template_spec_p : 1;
498 /* This is set for a namespace binding level. */
499 unsigned namespace_p : 1;
501 /* True if this level is that of a for-statement where we need to
502 worry about ambiguous (ARM or ISO) scope rules. */
503 unsigned is_for_scope : 1;
505 /* True if this level corresponds to an EH region, as for a try block.
506 Currently this information is only available while building the
508 unsigned eh_region : 1;
510 /* Four bits left for this word. */
512 #if defined(DEBUG_CP_BINDING_LEVELS)
513 /* Binding depth at which this level began. */
514 unsigned binding_depth;
515 #endif /* defined(DEBUG_CP_BINDING_LEVELS) */
518 #define NULL_BINDING_LEVEL ((struct binding_level *) NULL)
520 /* The binding level currently in effect. */
522 #define current_binding_level \
524 ? cp_function_chain->bindings \
525 : scope_chain->bindings)
527 /* The binding level of the current class, if any. */
529 #define class_binding_level scope_chain->class_bindings
531 /* A chain of binding_level structures awaiting reuse. */
533 static struct binding_level *free_binding_level;
535 /* The outermost binding level, for names of file scope.
536 This is created when the compiler is started and exists
537 through the entire run. */
539 static struct binding_level *global_binding_level;
541 /* Nonzero means unconditionally make a BLOCK for the next level pushed. */
543 static int keep_next_level_flag;
545 #if defined(DEBUG_CP_BINDING_LEVELS)
546 static int binding_depth = 0;
547 static int is_class_level = 0;
554 for (i = 0; i < binding_depth*2; i++)
557 #endif /* defined(DEBUG_CP_BINDING_LEVELS) */
559 static tree pushdecl_with_scope PARAMS ((tree, struct binding_level *));
562 push_binding_level (newlevel, tag_transparent, keep)
563 struct binding_level *newlevel;
564 int tag_transparent, keep;
566 /* Add this level to the front of the chain (stack) of levels that
568 bzero ((char*) newlevel, sizeof (struct binding_level));
569 newlevel->level_chain = current_binding_level;
570 current_binding_level = newlevel;
571 newlevel->tag_transparent = tag_transparent;
572 newlevel->more_cleanups_ok = 1;
574 newlevel->keep = keep;
575 #if defined(DEBUG_CP_BINDING_LEVELS)
576 newlevel->binding_depth = binding_depth;
578 fprintf (stderr, "push %s level 0x%08x line %d\n",
579 (is_class_level) ? "class" : "block", newlevel, lineno);
582 #endif /* defined(DEBUG_CP_BINDING_LEVELS) */
585 /* Find the innermost enclosing class scope, and reset
586 CLASS_BINDING_LEVEL appropriately. */
589 find_class_binding_level ()
591 struct binding_level *level = current_binding_level;
593 while (level && level->parm_flag != 2)
594 level = level->level_chain;
595 if (level && level->parm_flag == 2)
596 class_binding_level = level;
598 class_binding_level = 0;
604 if (global_binding_level)
606 /* Cannot pop a level, if there are none left to pop. */
607 if (current_binding_level == global_binding_level)
608 my_friendly_abort (123);
610 /* Pop the current level, and free the structure for reuse. */
611 #if defined(DEBUG_CP_BINDING_LEVELS)
614 fprintf (stderr, "pop %s level 0x%08x line %d\n",
615 (is_class_level) ? "class" : "block",
616 current_binding_level, lineno);
617 if (is_class_level != (current_binding_level == class_binding_level))
620 fprintf (stderr, "XXX is_class_level != (current_binding_level == class_binding_level)\n");
623 #endif /* defined(DEBUG_CP_BINDING_LEVELS) */
625 register struct binding_level *level = current_binding_level;
626 current_binding_level = current_binding_level->level_chain;
627 level->level_chain = free_binding_level;
628 #if 0 /* defined(DEBUG_CP_BINDING_LEVELS) */
629 if (level->binding_depth != binding_depth)
631 #endif /* defined(DEBUG_CP_BINDING_LEVELS) */
632 free_binding_level = level;
633 find_class_binding_level ();
638 suspend_binding_level ()
640 if (class_binding_level)
641 current_binding_level = class_binding_level;
643 if (global_binding_level)
645 /* Cannot suspend a level, if there are none left to suspend. */
646 if (current_binding_level == global_binding_level)
647 my_friendly_abort (123);
649 /* Suspend the current level. */
650 #if defined(DEBUG_CP_BINDING_LEVELS)
653 fprintf (stderr, "suspend %s level 0x%08x line %d\n",
654 (is_class_level) ? "class" : "block",
655 current_binding_level, lineno);
656 if (is_class_level != (current_binding_level == class_binding_level))
659 fprintf (stderr, "XXX is_class_level != (current_binding_level == class_binding_level)\n");
662 #endif /* defined(DEBUG_CP_BINDING_LEVELS) */
663 current_binding_level = current_binding_level->level_chain;
664 find_class_binding_level ();
668 resume_binding_level (b)
669 struct binding_level *b;
671 /* Resuming binding levels is meant only for namespaces,
672 and those cannot nest into classes. */
673 my_friendly_assert(!class_binding_level, 386);
674 /* Also, resuming a non-directly nested namespace is a no-no. */
675 my_friendly_assert(b->level_chain == current_binding_level, 386);
676 current_binding_level = b;
677 #if defined(DEBUG_CP_BINDING_LEVELS)
678 b->binding_depth = binding_depth;
680 fprintf (stderr, "resume %s level 0x%08x line %d\n",
681 (is_class_level) ? "class" : "block", b, lineno);
684 #endif /* defined(DEBUG_CP_BINDING_LEVELS) */
687 /* Create a new `struct binding_level'. */
690 struct binding_level *
691 make_binding_level ()
694 return (struct binding_level *) xmalloc (sizeof (struct binding_level));
697 /* Nonzero if we are currently in the global binding level. */
702 return current_binding_level == global_binding_level;
705 /* Return the innermost binding level that is not for a class scope. */
707 static struct binding_level *
708 innermost_nonclass_level ()
710 struct binding_level *b;
712 b = current_binding_level;
713 while (b->parm_flag == 2)
719 /* Nonzero if we are currently in a toplevel binding level. This
720 means either the global binding level or a namespace in a toplevel
721 binding level. Since there are no non-toplevel namespace levels,
722 this really means any namespace or template parameter level. We
723 also include a class whose context is toplevel. */
726 toplevel_bindings_p ()
728 struct binding_level *b = innermost_nonclass_level ();
730 return b->namespace_p || b->template_parms_p;
733 /* Nonzero if this is a namespace scope, or if we are defining a class
734 which is itself at namespace scope, or whose enclosing class is
735 such a class, etc. */
738 namespace_bindings_p ()
740 struct binding_level *b = innermost_nonclass_level ();
742 return b->namespace_p;
745 /* If KEEP is non-zero, make a BLOCK node for the next binding level,
746 unconditionally. Otherwise, use the normal logic to decide whether
747 or not to create a BLOCK. */
750 keep_next_level (keep)
753 keep_next_level_flag = keep;
756 /* Nonzero if the current level needs to have a BLOCK made. */
761 return (current_binding_level->blocks != NULL_TREE
762 || current_binding_level->keep
763 || current_binding_level->names != NULL_TREE
764 || (current_binding_level->tags != NULL_TREE
765 && !current_binding_level->tag_transparent));
769 declare_namespace_level ()
771 current_binding_level->namespace_p = 1;
774 /* Returns non-zero if this scope was created to store template
778 template_parm_scope_p ()
780 return current_binding_level->template_parms_p;
783 /* Returns the kind of template specialization we are currently
784 processing, given that it's declaration contained N_CLASS_SCOPES
785 explicit scope qualifications. */
788 current_tmpl_spec_kind (n_class_scopes)
791 int n_template_parm_scopes = 0;
792 int seen_specialization_p = 0;
793 int innermost_specialization_p = 0;
794 struct binding_level *b;
796 /* Scan through the template parameter scopes. */
797 for (b = current_binding_level; b->template_parms_p; b = b->level_chain)
799 /* If we see a specialization scope inside a parameter scope,
800 then something is wrong. That corresponds to a declaration
803 template <class T> template <> ...
805 which is always illegal since [temp.expl.spec] forbids the
806 specialization of a class member template if the enclosing
807 class templates are not explicitly specialized as well. */
808 if (b->template_spec_p)
810 if (n_template_parm_scopes == 0)
811 innermost_specialization_p = 1;
813 seen_specialization_p = 1;
815 else if (seen_specialization_p == 1)
816 return tsk_invalid_member_spec;
818 ++n_template_parm_scopes;
821 /* Handle explicit instantiations. */
822 if (processing_explicit_instantiation)
824 if (n_template_parm_scopes != 0)
825 /* We've seen a template parameter list during an explicit
826 instantiation. For example:
828 template <class T> template void f(int);
830 This is erroneous. */
831 return tsk_invalid_expl_inst;
833 return tsk_expl_inst;
836 if (n_template_parm_scopes < n_class_scopes)
837 /* We've not seen enough template headers to match all the
838 specialized classes present. For example:
840 template <class T> void R<T>::S<T>::f(int);
842 This is illegal; there needs to be one set of template
843 parameters for each class. */
844 return tsk_insufficient_parms;
845 else if (n_template_parm_scopes == n_class_scopes)
846 /* We're processing a non-template declaration (even though it may
847 be a member of a template class.) For example:
849 template <class T> void S<T>::f(int);
851 The `class T' maches the `S<T>', leaving no template headers
852 corresponding to the `f'. */
854 else if (n_template_parm_scopes > n_class_scopes + 1)
855 /* We've got too many template headers. For example:
857 template <> template <class T> void f (T);
859 There need to be more enclosing classes. */
860 return tsk_excessive_parms;
862 /* This must be a template. It's of the form:
864 template <class T> template <class U> void S<T>::f(U);
866 This is a specialization if the innermost level was a
867 specialization; otherwise it's just a definition of the
869 return innermost_specialization_p ? tsk_expl_spec : tsk_template;
873 set_class_shadows (shadows)
876 class_binding_level->class_shadowed = shadows;
879 /* Enter a new binding level.
880 If TAG_TRANSPARENT is nonzero, do so only for the name space of variables,
881 not for that of tags. */
884 pushlevel (tag_transparent)
887 struct binding_level *newlevel;
889 if (cfun && !doing_semantic_analysis_p ())
892 /* Reuse or create a struct for this binding level. */
893 #if defined(DEBUG_CP_BINDING_LEVELS)
895 #else /* !defined(DEBUG_CP_BINDING_LEVELS) */
896 if (free_binding_level)
897 #endif /* !defined(DEBUG_CP_BINDING_LEVELS) */
899 newlevel = free_binding_level;
900 free_binding_level = free_binding_level->level_chain;
903 newlevel = make_binding_level ();
905 push_binding_level (newlevel, tag_transparent, keep_next_level_flag);
906 GNU_xref_start_scope ((HOST_WIDE_INT) newlevel);
907 keep_next_level_flag = 0;
910 /* Enter a new scope. The KIND indicates what kind of scope is being
921 case sk_template_spec:
922 current_binding_level->template_spec_p = 1;
925 case sk_template_parms:
926 current_binding_level->template_parms_p = 1;
930 my_friendly_abort (20000309);
934 /* Exit the current scope. */
943 note_level_for_for ()
945 current_binding_level->is_for_scope = 1;
948 /* Record that the current binding level represents a try block. */
953 current_binding_level->eh_region = 1;
956 /* For a binding between a name and an entity at a block scope,
957 this is the `struct binding_level' for the block. */
958 #define BINDING_LEVEL(NODE) \
959 (((struct tree_binding*)NODE)->scope.level)
961 /* Make DECL the innermost binding for ID. The LEVEL is the binding
962 level at which this declaration is being bound. */
965 push_binding (id, decl, level)
968 struct binding_level* level;
972 binding = make_node (CPLUS_BINDING);
974 /* Now, fill in the binding information. */
975 BINDING_VALUE (binding) = decl;
976 BINDING_TYPE (binding) = NULL_TREE;
977 BINDING_LEVEL (binding) = level;
978 INHERITED_VALUE_BINDING_P (binding) = 0;
979 LOCAL_BINDING_P (binding) = (level != class_binding_level);
980 BINDING_HAS_LEVEL_P (binding) = 1;
982 /* And put it on the front of the list of bindings for ID. */
983 TREE_CHAIN (binding) = IDENTIFIER_BINDING (id);
984 IDENTIFIER_BINDING (id) = binding;
987 /* ID is already bound in the current scope. But, DECL is an
988 additional binding for ID in the same scope. This is the `struct
989 stat' hack whereby a non-typedef class-name or enum-name can be
990 bound at the same level as some other kind of entity. It's the
991 responsibility of the caller to check that inserting this name is
992 legal here. Returns nonzero if the new binding was successful. */
994 add_binding (id, decl)
998 tree binding = IDENTIFIER_BINDING (id);
1001 if (TREE_CODE (decl) == TYPE_DECL && DECL_ARTIFICIAL (decl))
1002 /* The new name is the type name. */
1003 BINDING_TYPE (binding) = decl;
1004 else if (!BINDING_VALUE (binding))
1005 /* This situation arises when push_class_level_binding moves an
1006 inherited type-binding out of the way to make room for a new
1008 BINDING_VALUE (binding) = decl;
1009 else if (TREE_CODE (BINDING_VALUE (binding)) == TYPE_DECL
1010 && DECL_ARTIFICIAL (BINDING_VALUE (binding)))
1012 /* The old binding was a type name. It was placed in
1013 BINDING_VALUE because it was thought, at the point it was
1014 declared, to be the only entity with such a name. Move the
1015 type name into the type slot; it is now hidden by the new
1017 BINDING_TYPE (binding) = BINDING_VALUE (binding);
1018 BINDING_VALUE (binding) = decl;
1019 INHERITED_VALUE_BINDING_P (binding) = 0;
1021 else if (TREE_CODE (BINDING_VALUE (binding)) == TYPE_DECL
1022 && TREE_CODE (decl) == TYPE_DECL
1023 && DECL_NAME (decl) == DECL_NAME (BINDING_VALUE (binding))
1024 && same_type_p (TREE_TYPE (decl),
1025 TREE_TYPE (BINDING_VALUE (binding))))
1026 /* We have two typedef-names, both naming the same type to have
1027 the same name. This is OK because of:
1031 In a given scope, a typedef specifier can be used to redefine
1032 the name of any type declared in that scope to refer to the
1033 type to which it already refers. */
1035 /* There can be two block-scope declarations of the same variable,
1036 so long as they are `extern' declarations. */
1037 else if (TREE_CODE (decl) == VAR_DECL
1038 && TREE_CODE (BINDING_VALUE (binding)) == VAR_DECL
1039 && DECL_EXTERNAL (decl)
1040 && DECL_EXTERNAL (BINDING_VALUE (binding)))
1042 duplicate_decls (decl, BINDING_VALUE (binding));
1047 cp_error ("declaration of `%#D'", decl);
1048 cp_error_at ("conflicts with previous declaration `%#D'",
1049 BINDING_VALUE (binding));
1056 /* Add DECL to the list of things declared in B. */
1059 add_decl_to_level (decl, b)
1061 struct binding_level *b;
1063 /* We build up the list in reverse order, and reverse it later if
1065 TREE_CHAIN (decl) = b->names;
1069 /* Bind DECL to ID in the current_binding_level, assumed to be a local
1070 binding level. If PUSH_USING is set in FLAGS, we know that DECL
1071 doesn't really belong to this binding level, that it got here
1072 through a using-declaration. */
1075 push_local_binding (id, decl, flags)
1080 struct binding_level *b;
1082 /* Skip over any local classes. This makes sense if we call
1083 push_local_binding with a friend decl of a local class. */
1084 b = current_binding_level;
1085 while (b->parm_flag == 2)
1088 if (lookup_name_current_level (id))
1090 /* Supplement the existing binding. */
1091 if (!add_binding (id, decl))
1092 /* It didn't work. Something else must be bound at this
1093 level. Do not add DECL to the list of things to pop
1098 /* Create a new binding. */
1099 push_binding (id, decl, b);
1101 if (TREE_CODE (decl) == OVERLOAD || (flags & PUSH_USING))
1102 /* We must put the OVERLOAD into a TREE_LIST since the
1103 TREE_CHAIN of an OVERLOAD is already used. Similarly for
1104 decls that got here through a using-declaration. */
1105 decl = build_tree_list (NULL_TREE, decl);
1107 /* And put DECL on the list of things declared by the current
1109 add_decl_to_level (decl, b);
1112 /* Bind DECL to ID in the class_binding_level. Returns nonzero if the
1113 binding was successful. */
1116 push_class_binding (id, decl)
1121 tree binding = IDENTIFIER_BINDING (id);
1124 /* Note that we declared this value so that we can issue an error if
1125 this an illegal redeclaration of a name already used for some
1127 note_name_declared_in_class (id, decl);
1129 if (binding && BINDING_LEVEL (binding) == class_binding_level)
1130 /* Supplement the existing binding. */
1131 result = add_binding (id, decl);
1133 /* Create a new binding. */
1134 push_binding (id, decl, class_binding_level);
1136 /* Update the IDENTIFIER_CLASS_VALUE for this ID to be the
1137 class-level declaration. Note that we do not use DECL here
1138 because of the possibility of the `struct stat' hack; if DECL is
1139 a class-name or enum-name we might prefer a field-name, or some
1141 IDENTIFIER_CLASS_VALUE (id) = BINDING_VALUE (IDENTIFIER_BINDING (id));
1143 /* If this is a binding from a base class, mark it as such. */
1144 binding = IDENTIFIER_BINDING (id);
1145 if (BINDING_VALUE (binding) == decl && TREE_CODE (decl) != TREE_LIST)
1147 /* Any implicit typename must be from a base-class. The
1148 context for an implicit typename declaration is always
1149 the derived class in which the lookup was done, so the checks
1150 based on the context of DECL below will not trigger. */
1151 if (IMPLICIT_TYPENAME_TYPE_DECL_P (decl))
1152 INHERITED_VALUE_BINDING_P (binding) = 1;
1155 if (TREE_CODE (decl) == OVERLOAD)
1156 context = CP_DECL_CONTEXT (OVL_CURRENT (decl));
1159 my_friendly_assert (DECL_P (decl), 0);
1160 context = CP_DECL_CONTEXT (decl);
1163 if (is_properly_derived_from (current_class_type, context))
1164 INHERITED_VALUE_BINDING_P (binding) = 1;
1166 INHERITED_VALUE_BINDING_P (binding) = 0;
1169 else if (BINDING_VALUE (binding) == decl)
1170 /* We only encounter a TREE_LIST when push_class_decls detects an
1171 ambiguity. Such an ambiguity can be overridden by a definition
1173 INHERITED_VALUE_BINDING_P (binding) = 1;
1178 /* Remove the binding for DECL which should be the innermost binding
1182 pop_binding (id, decl)
1188 if (id == NULL_TREE)
1189 /* It's easiest to write the loops that call this function without
1190 checking whether or not the entities involved have names. We
1191 get here for such an entity. */
1194 /* Get the innermost binding for ID. */
1195 binding = IDENTIFIER_BINDING (id);
1197 /* The name should be bound. */
1198 my_friendly_assert (binding != NULL_TREE, 0);
1200 /* The DECL will be either the ordinary binding or the type
1201 binding for this identifier. Remove that binding. */
1202 if (BINDING_VALUE (binding) == decl)
1203 BINDING_VALUE (binding) = NULL_TREE;
1204 else if (BINDING_TYPE (binding) == decl)
1205 BINDING_TYPE (binding) = NULL_TREE;
1207 my_friendly_abort (0);
1209 if (!BINDING_VALUE (binding) && !BINDING_TYPE (binding))
1210 /* We're completely done with the innermost binding for this
1211 identifier. Unhook it from the list of bindings. */
1212 IDENTIFIER_BINDING (id) = TREE_CHAIN (binding);
1215 /* When a label goes out of scope, check to see if that label was used
1216 in a valid manner, and issue any appropriate warnings or errors. */
1219 pop_label (label, old_value)
1223 if (!processing_template_decl && doing_semantic_analysis_p ())
1225 if (DECL_INITIAL (label) == NULL_TREE)
1227 cp_error_at ("label `%D' used but not defined", label);
1228 /* Avoid crashing later. */
1229 define_label (input_filename, 1, DECL_NAME (label));
1231 else if (warn_unused_label && !TREE_USED (label))
1232 cp_warning_at ("label `%D' defined but not used", label);
1235 SET_IDENTIFIER_LABEL_VALUE (DECL_NAME (label), old_value);
1238 /* At the end of a function, all labels declared within the function
1239 go out of scope. BLOCK is the top-level block for the
1246 struct named_label_list *link;
1248 /* Clear out the definitions of all label names, since their scopes
1250 for (link = named_labels; link; link = link->next)
1252 pop_label (link->label_decl, link->old_value);
1253 /* Put the labels into the "variables" of the top-level block,
1254 so debugger can see them. */
1255 TREE_CHAIN (link->label_decl) = BLOCK_VARS (block);
1256 BLOCK_VARS (block) = link->label_decl;
1259 named_labels = NULL;
1262 /* Exit a binding level.
1263 Pop the level off, and restore the state of the identifier-decl mappings
1264 that were in effect when this level was entered.
1266 If KEEP == 1, this level had explicit declarations, so
1267 and create a "block" (a BLOCK node) for the level
1268 to record its declarations and subblocks for symbol table output.
1270 If FUNCTIONBODY is nonzero, this level is the body of a function,
1271 so create a block as if KEEP were set and also clear out all
1274 If REVERSE is nonzero, reverse the order of decls before putting
1275 them into the BLOCK. */
1278 poplevel (keep, reverse, functionbody)
1284 /* The chain of decls was accumulated in reverse order.
1285 Put it into forward order, just for cleanliness. */
1287 int tmp = functionbody;
1288 int real_functionbody;
1291 tree block = NULL_TREE;
1293 int leaving_for_scope;
1295 if (cfun && !doing_semantic_analysis_p ())
1298 my_friendly_assert (current_binding_level->parm_flag != 2,
1301 real_functionbody = (current_binding_level->keep == 2
1302 ? ((functionbody = 0), tmp) : functionbody);
1303 tags = functionbody >= 0 ? current_binding_level->tags : 0;
1304 subblocks = functionbody >= 0 ? current_binding_level->blocks : 0;
1306 my_friendly_assert (!current_binding_level->class_shadowed,
1309 /* We used to use KEEP == 2 to indicate that the new block should go
1310 at the beginning of the list of blocks at this binding level,
1311 rather than the end. This hack is no longer used. */
1312 my_friendly_assert (keep == 0 || keep == 1, 0);
1314 GNU_xref_end_scope ((HOST_WIDE_INT) current_binding_level,
1315 (HOST_WIDE_INT) current_binding_level->level_chain,
1316 current_binding_level->parm_flag,
1317 current_binding_level->keep);
1319 if (current_binding_level->keep == 1)
1322 /* Any uses of undefined labels, and any defined labels, now operate
1323 under constraints of next binding contour. */
1324 if (cfun && !functionbody)
1326 struct binding_level *level_chain;
1327 level_chain = current_binding_level->level_chain;
1330 struct named_label_use_list *uses;
1331 struct named_label_list *labels;
1332 for (labels = named_labels; labels; labels = labels->next)
1333 if (labels->binding_level == current_binding_level)
1336 if (current_binding_level->eh_region)
1337 labels->eh_region = 1;
1338 for (decl = labels->names_in_scope; decl;
1339 decl = TREE_CHAIN (decl))
1340 if (decl_jump_unsafe (decl))
1341 labels->bad_decls = tree_cons (NULL_TREE, decl,
1343 labels->binding_level = level_chain;
1344 labels->names_in_scope = level_chain->names;
1347 for (uses = named_label_uses; uses; uses = uses->next)
1348 if (uses->binding_level == current_binding_level)
1350 uses->binding_level = level_chain;
1351 uses->names_in_scope = level_chain->names;
1356 /* Get the decls in the order they were written.
1357 Usually current_binding_level->names is in reverse order.
1358 But parameter decls were previously put in forward order. */
1361 current_binding_level->names
1362 = decls = nreverse (current_binding_level->names);
1364 decls = current_binding_level->names;
1366 /* Output any nested inline functions within this block
1367 if they weren't already output. */
1368 for (decl = decls; decl; decl = TREE_CHAIN (decl))
1369 if (TREE_CODE (decl) == FUNCTION_DECL
1370 && ! TREE_ASM_WRITTEN (decl)
1371 && DECL_INITIAL (decl) != NULL_TREE
1372 && TREE_ADDRESSABLE (decl)
1373 && decl_function_context (decl) == current_function_decl)
1375 /* If this decl was copied from a file-scope decl
1376 on account of a block-scope extern decl,
1377 propagate TREE_ADDRESSABLE to the file-scope decl. */
1378 if (DECL_ABSTRACT_ORIGIN (decl) != NULL_TREE)
1379 TREE_ADDRESSABLE (DECL_ABSTRACT_ORIGIN (decl)) = 1;
1382 push_function_context ();
1383 output_inline_function (decl);
1384 pop_function_context ();
1388 /* When not in function-at-a-time mode, expand_end_bindings will
1389 warn about unused variables. But, in function-at-a-time mode
1390 expand_end_bindings is not passed the list of variables in the
1391 current scope, and therefore no warning is emitted. So, we
1392 explicitly warn here. */
1393 if (!processing_template_decl)
1394 warn_about_unused_variables (getdecls ());
1396 /* If there were any declarations or structure tags in that level,
1397 or if this level is a function body,
1398 create a BLOCK to record them for the life of this function. */
1400 if (keep == 1 || functionbody)
1401 block = make_node (BLOCK);
1402 if (block != NULL_TREE)
1404 BLOCK_VARS (block) = decls;
1405 BLOCK_SUBBLOCKS (block) = subblocks;
1408 /* In each subblock, record that this is its superior. */
1410 for (link = subblocks; link; link = TREE_CHAIN (link))
1411 BLOCK_SUPERCONTEXT (link) = block;
1413 /* We still support the old for-scope rules, whereby the variables
1414 in a for-init statement were in scope after the for-statement
1415 ended. We only use the new rules in flag_new_for_scope is
1418 = current_binding_level->is_for_scope && flag_new_for_scope == 1;
1420 /* Remove declarations for all the DECLs in this level. */
1421 for (link = decls; link; link = TREE_CHAIN (link))
1423 if (leaving_for_scope && TREE_CODE (link) == VAR_DECL
1424 && DECL_NAME (link))
1427 = TREE_CHAIN (IDENTIFIER_BINDING (DECL_NAME (link)));
1431 ns_binding = IDENTIFIER_NAMESPACE_VALUE (DECL_NAME (link));
1433 ns_binding = NULL_TREE;
1436 && (BINDING_LEVEL (outer_binding)
1437 == current_binding_level->level_chain))
1438 /* We have something like:
1443 and we are leaving the `for' scope. There's no reason to
1444 keep the binding of the inner `i' in this case. */
1445 pop_binding (DECL_NAME (link), link);
1446 else if ((outer_binding
1447 && (TREE_CODE (BINDING_VALUE (outer_binding))
1450 && TREE_CODE (ns_binding) == TYPE_DECL))
1451 /* Here, we have something like:
1459 We must pop the for-scope binding so we know what's a
1460 type and what isn't. */
1461 pop_binding (DECL_NAME (link), link);
1464 /* Mark this VAR_DECL as dead so that we can tell we left it
1465 there only for backward compatibility. */
1466 DECL_DEAD_FOR_LOCAL (link) = 1;
1468 /* Keep track of what should of have happenned when we
1469 popped the binding. */
1470 if (outer_binding && BINDING_VALUE (outer_binding))
1471 DECL_SHADOWED_FOR_VAR (link)
1472 = BINDING_VALUE (outer_binding);
1474 /* Add it to the list of dead variables in the next
1475 outermost binding to that we can remove these when we
1476 leave that binding. */
1477 current_binding_level->level_chain->dead_vars_from_for
1478 = tree_cons (NULL_TREE, link,
1479 current_binding_level->level_chain->
1480 dead_vars_from_for);
1482 /* Although we don't pop the CPLUS_BINDING, we do clear
1483 its BINDING_LEVEL since the level is going away now. */
1484 BINDING_LEVEL (IDENTIFIER_BINDING (DECL_NAME (link)))
1490 /* Remove the binding. */
1492 if (TREE_CODE (decl) == TREE_LIST)
1493 decl = TREE_VALUE (decl);
1495 pop_binding (DECL_NAME (decl), decl);
1496 else if (TREE_CODE (decl) == OVERLOAD)
1497 pop_binding (DECL_NAME (OVL_FUNCTION (decl)), decl);
1499 my_friendly_abort (0);
1503 /* Remove declarations for any `for' variables from inner scopes
1504 that we kept around. */
1505 for (link = current_binding_level->dead_vars_from_for;
1506 link; link = TREE_CHAIN (link))
1507 pop_binding (DECL_NAME (TREE_VALUE (link)), TREE_VALUE (link));
1509 /* Restore the IDENTIFIER_TYPE_VALUEs. */
1510 for (link = current_binding_level->type_shadowed;
1511 link; link = TREE_CHAIN (link))
1512 SET_IDENTIFIER_TYPE_VALUE (TREE_PURPOSE (link), TREE_VALUE (link));
1514 /* Restore the IDENTIFIER_LABEL_VALUEs for local labels. */
1515 for (link = current_binding_level->shadowed_labels;
1517 link = TREE_CHAIN (link))
1518 pop_label (TREE_VALUE (link), TREE_PURPOSE (link));
1520 /* There may be OVERLOADs (wrapped in TREE_LISTs) on the BLOCK_VARs
1521 list if a `using' declaration put them there. The debugging
1522 back-ends won't understand OVERLOAD, so we remove them here.
1523 Because the BLOCK_VARS are (temporarily) shared with
1524 CURRENT_BINDING_LEVEL->NAMES we must do this fixup after we have
1525 popped all the bindings. */
1530 for (d = &BLOCK_VARS (block); *d; )
1532 if (TREE_CODE (*d) == TREE_LIST)
1533 *d = TREE_CHAIN (*d);
1535 d = &TREE_CHAIN (*d);
1539 /* If the level being exited is the top level of a function,
1540 check over all the labels. */
1543 /* Since this is the top level block of a function, the vars are
1544 the function's parameters. Don't leave them in the BLOCK
1545 because they are found in the FUNCTION_DECL instead. */
1546 BLOCK_VARS (block) = 0;
1550 tmp = current_binding_level->keep;
1552 pop_binding_level ();
1554 DECL_INITIAL (current_function_decl) = block;
1556 current_binding_level->blocks
1557 = chainon (current_binding_level->blocks, block);
1559 /* If we did not make a block for the level just exited,
1560 any blocks made for inner levels
1561 (since they cannot be recorded as subblocks in that level)
1562 must be carried forward so they will later become subblocks
1563 of something else. */
1565 current_binding_level->blocks
1566 = chainon (current_binding_level->blocks, subblocks);
1568 /* Each and every BLOCK node created here in `poplevel' is important
1569 (e.g. for proper debugging information) so if we created one
1570 earlier, mark it as "used". */
1572 TREE_USED (block) = 1;
1574 /* Take care of compiler's internal binding structures. */
1580 = add_scope_stmt (/*begin_p=*/0, /*partial_p=*/1);
1583 SCOPE_STMT_BLOCK (TREE_PURPOSE (scope_stmts)) = block;
1584 SCOPE_STMT_BLOCK (TREE_VALUE (scope_stmts)) = block;
1587 block = poplevel (keep, reverse, functionbody);
1593 /* Delete the node BLOCK from the current binding level.
1594 This is used for the block inside a stmt expr ({...})
1595 so that the block can be reinserted where appropriate. */
1598 delete_block (block)
1602 if (current_binding_level->blocks == block)
1603 current_binding_level->blocks = TREE_CHAIN (block);
1604 for (t = current_binding_level->blocks; t;)
1606 if (TREE_CHAIN (t) == block)
1607 TREE_CHAIN (t) = TREE_CHAIN (block);
1611 TREE_CHAIN (block) = NULL_TREE;
1612 /* Clear TREE_USED which is always set by poplevel.
1613 The flag is set again if insert_block is called. */
1614 TREE_USED (block) = 0;
1617 /* Insert BLOCK at the end of the list of subblocks of the
1618 current binding level. This is used when a BIND_EXPR is expanded,
1619 to handle the BLOCK node inside the BIND_EXPR. */
1622 insert_block (block)
1625 TREE_USED (block) = 1;
1626 current_binding_level->blocks
1627 = chainon (current_binding_level->blocks, block);
1630 /* Set the BLOCK node for the innermost scope
1631 (the one we are currently in). */
1635 tree block ATTRIBUTE_UNUSED;
1637 /* The RTL expansion machinery requires us to provide this callback,
1638 but it is not applicable in function-at-a-time mode. */
1639 my_friendly_assert (cfun && !doing_semantic_analysis_p (), 20000911);
1642 /* Do a pushlevel for class declarations. */
1647 register struct binding_level *newlevel;
1649 /* Reuse or create a struct for this binding level. */
1650 #if defined(DEBUG_CP_BINDING_LEVELS)
1652 #else /* !defined(DEBUG_CP_BINDING_LEVELS) */
1653 if (free_binding_level)
1654 #endif /* !defined(DEBUG_CP_BINDING_LEVELS) */
1656 newlevel = free_binding_level;
1657 free_binding_level = free_binding_level->level_chain;
1660 newlevel = make_binding_level ();
1662 #if defined(DEBUG_CP_BINDING_LEVELS)
1664 #endif /* defined(DEBUG_CP_BINDING_LEVELS) */
1666 push_binding_level (newlevel, 0, 0);
1668 class_binding_level = current_binding_level;
1669 class_binding_level->parm_flag = 2;
1670 class_binding_level->this_class = current_class_type;
1673 /* ...and a poplevel for class declarations. */
1678 register struct binding_level *level = class_binding_level;
1681 my_friendly_assert (level != 0, 354);
1683 /* If we're leaving a toplevel class, don't bother to do the setting
1684 of IDENTIFIER_CLASS_VALUE to NULL_TREE, since first of all this slot
1685 shouldn't even be used when current_class_type isn't set, and second,
1686 if we don't touch it here, we're able to use the cache effect if the
1687 next time we're entering a class scope, it is the same class. */
1688 if (current_class_depth != 1)
1690 struct binding_level* b;
1692 /* Clear out our IDENTIFIER_CLASS_VALUEs. */
1693 for (shadowed = level->class_shadowed;
1695 shadowed = TREE_CHAIN (shadowed))
1696 IDENTIFIER_CLASS_VALUE (TREE_PURPOSE (shadowed)) = NULL_TREE;
1698 /* Find the next enclosing class, and recreate
1699 IDENTIFIER_CLASS_VALUEs appropriate for that class. */
1700 b = level->level_chain;
1701 while (b && b->parm_flag != 2)
1705 for (shadowed = b->class_shadowed;
1707 shadowed = TREE_CHAIN (shadowed))
1711 t = IDENTIFIER_BINDING (TREE_PURPOSE (shadowed));
1712 while (t && BINDING_LEVEL (t) != b)
1716 IDENTIFIER_CLASS_VALUE (TREE_PURPOSE (shadowed))
1717 = BINDING_VALUE (t);
1721 /* Remember to save what IDENTIFIER's were bound in this scope so we
1722 can recover from cache misses. */
1724 previous_class_type = current_class_type;
1725 previous_class_values = class_binding_level->class_shadowed;
1727 for (shadowed = level->type_shadowed;
1729 shadowed = TREE_CHAIN (shadowed))
1730 SET_IDENTIFIER_TYPE_VALUE (TREE_PURPOSE (shadowed), TREE_VALUE (shadowed));
1732 /* Remove the bindings for all of the class-level declarations. */
1733 for (shadowed = level->class_shadowed;
1735 shadowed = TREE_CHAIN (shadowed))
1736 pop_binding (TREE_PURPOSE (shadowed), TREE_TYPE (shadowed));
1738 GNU_xref_end_scope ((HOST_WIDE_INT) class_binding_level,
1739 (HOST_WIDE_INT) class_binding_level->level_chain,
1740 class_binding_level->parm_flag,
1741 class_binding_level->keep);
1743 /* Now, pop out of the binding level which we created up in the
1744 `pushlevel_class' routine. */
1745 #if defined(DEBUG_CP_BINDING_LEVELS)
1747 #endif /* defined(DEBUG_CP_BINDING_LEVELS) */
1749 pop_binding_level ();
1752 /* We are entering the scope of a class. Clear IDENTIFIER_CLASS_VALUE
1753 for any names in enclosing classes. */
1756 clear_identifier_class_values ()
1760 if (!class_binding_level)
1763 for (t = class_binding_level->class_shadowed;
1766 IDENTIFIER_CLASS_VALUE (TREE_PURPOSE (t)) = NULL_TREE;
1769 /* Returns non-zero if T is a virtual function table. */
1772 vtable_decl_p (t, data)
1774 void *data ATTRIBUTE_UNUSED;
1776 return (TREE_CODE (t) == VAR_DECL && DECL_VIRTUAL_P (t));
1779 /* Returns non-zero if T is a TYPE_DECL for a type with virtual
1783 vtype_decl_p (t, data)
1785 void *data ATTRIBUTE_UNUSED;
1787 return (TREE_CODE (t) == TYPE_DECL
1788 && TREE_CODE (TREE_TYPE (t)) == RECORD_TYPE
1789 && TYPE_POLYMORPHIC_P (TREE_TYPE (t)));
1792 /* Return the declarations that are members of the namespace NS. */
1795 cp_namespace_decls (ns)
1798 return NAMESPACE_LEVEL (ns)->names;
1801 /* Walk all the namespaces contained NAMESPACE, including NAMESPACE
1802 itself, calling F for each. The DATA is passed to F as well. */
1805 walk_namespaces_r (namespace, f, data)
1807 walk_namespaces_fn f;
1813 result |= (*f) (namespace, data);
1815 for (current = cp_namespace_decls (namespace);
1817 current = TREE_CHAIN (current))
1819 if (TREE_CODE (current) != NAMESPACE_DECL
1820 || DECL_NAMESPACE_ALIAS (current))
1822 if (!DECL_LANG_SPECIFIC (current))
1825 my_friendly_assert (current == fake_std_node, 393);
1829 /* We found a namespace. */
1830 result |= walk_namespaces_r (current, f, data);
1836 /* Walk all the namespaces, calling F for each. The DATA is passed to
1840 walk_namespaces (f, data)
1841 walk_namespaces_fn f;
1844 return walk_namespaces_r (global_namespace, f, data);
1847 struct walk_globals_data {
1848 walk_globals_pred p;
1853 /* Walk the global declarations in NAMESPACE. Whenever one is found
1854 for which P returns non-zero, call F with its address. If any call
1855 to F returns a non-zero value, return a non-zero value. */
1858 walk_globals_r (namespace, data)
1862 struct walk_globals_data* wgd = (struct walk_globals_data *) data;
1863 walk_globals_pred p = wgd->p;
1864 walk_globals_fn f = wgd->f;
1865 void *d = wgd->data;
1869 t = &NAMESPACE_LEVEL (namespace)->names;
1876 result |= (*f) (t, d);
1878 /* If F changed *T, then *T still points at the next item to
1881 t = &TREE_CHAIN (*t);
1887 /* Walk the global declarations. Whenever one is found for which P
1888 returns non-zero, call F with its address. If any call to F
1889 returns a non-zero value, return a non-zero value. */
1892 walk_globals (p, f, data)
1893 walk_globals_pred p;
1897 struct walk_globals_data wgd;
1902 return walk_namespaces (walk_globals_r, &wgd);
1905 /* Call wrapup_globals_declarations for the globals in NAMESPACE. If
1906 DATA is non-NULL, this is the last time we will call
1907 wrapup_global_declarations for this NAMESPACE. */
1910 wrapup_globals_for_namespace (namespace, data)
1914 tree globals = cp_namespace_decls (namespace);
1915 int len = list_length (globals);
1916 tree *vec = (tree *) alloca (sizeof (tree) * len);
1920 int last_time = (data != 0);
1922 if (last_time && namespace == global_namespace)
1923 /* Let compile_file handle the global namespace. */
1926 /* Process the decls in reverse order--earliest first.
1927 Put them into VEC from back to front, then take out from front. */
1929 for (i = 0, decl = globals; i < len; i++, decl = TREE_CHAIN (decl))
1931 /* Pretend we've output an unused static variable. This ensures
1932 that the toplevel __FUNCTION__ etc won't be emitted, unless
1934 if (TREE_CODE (decl) == VAR_DECL && DECL_ARTIFICIAL (decl)
1935 && !TREE_PUBLIC (decl) && !TREE_USED (decl))
1937 TREE_ASM_WRITTEN (decl) = 1;
1938 DECL_IGNORED_P (decl) = 1;
1940 vec[len - i - 1] = decl;
1945 check_global_declarations (vec, len);
1949 /* Temporarily mark vtables as external. That prevents
1950 wrapup_global_declarations from writing them out; we must process
1951 them ourselves in finish_vtable_vardecl. */
1952 for (i = 0; i < len; ++i)
1953 if (vtable_decl_p (vec[i], /*data=*/0) && !DECL_EXTERNAL (vec[i]))
1955 DECL_NOT_REALLY_EXTERN (vec[i]) = 1;
1956 DECL_EXTERNAL (vec[i]) = 1;
1959 /* Write out any globals that need to be output. */
1960 result = wrapup_global_declarations (vec, len);
1962 /* Undo the hack to DECL_EXTERNAL above. */
1963 for (i = 0; i < len; ++i)
1964 if (vtable_decl_p (vec[i], /*data=*/0)
1965 && DECL_NOT_REALLY_EXTERN (vec[i]))
1967 DECL_NOT_REALLY_EXTERN (vec[i]) = 0;
1968 DECL_EXTERNAL (vec[i]) = 0;
1975 /* Mark ARG (which is really a struct binding_level **) for GC. */
1978 mark_binding_level (arg)
1981 struct binding_level *lvl = *(struct binding_level **)arg;
1983 for (; lvl; lvl = lvl->level_chain)
1985 ggc_mark_tree (lvl->names);
1986 ggc_mark_tree (lvl->tags);
1987 ggc_mark_tree (lvl->usings);
1988 ggc_mark_tree (lvl->using_directives);
1989 ggc_mark_tree (lvl->class_shadowed);
1990 ggc_mark_tree (lvl->type_shadowed);
1991 ggc_mark_tree (lvl->shadowed_labels);
1992 ggc_mark_tree (lvl->blocks);
1993 ggc_mark_tree (lvl->this_class);
1994 ggc_mark_tree (lvl->incomplete);
1995 ggc_mark_tree (lvl->dead_vars_from_for);
2000 mark_named_label_lists (labs, uses)
2004 struct named_label_list *l = *(struct named_label_list **)labs;
2005 struct named_label_use_list *u = *(struct named_label_use_list **)uses;
2007 for (; l; l = l->next)
2010 mark_binding_level (l->binding_level);
2011 ggc_mark_tree (l->old_value);
2012 ggc_mark_tree (l->label_decl);
2013 ggc_mark_tree (l->bad_decls);
2016 for (; u; u = u->next)
2020 /* For debugging. */
2021 static int no_print_functions = 0;
2022 static int no_print_builtins = 0;
2025 print_binding_level (lvl)
2026 struct binding_level *lvl;
2030 fprintf (stderr, " blocks=");
2031 fprintf (stderr, HOST_PTR_PRINTF, lvl->blocks);
2032 fprintf (stderr, " n_incomplete=%d parm_flag=%d keep=%d",
2033 list_length (lvl->incomplete), lvl->parm_flag, lvl->keep);
2034 if (lvl->tag_transparent)
2035 fprintf (stderr, " tag-transparent");
2036 if (lvl->more_cleanups_ok)
2037 fprintf (stderr, " more-cleanups-ok");
2038 if (lvl->have_cleanups)
2039 fprintf (stderr, " have-cleanups");
2040 fprintf (stderr, "\n");
2043 fprintf (stderr, " names:\t");
2044 /* We can probably fit 3 names to a line? */
2045 for (t = lvl->names; t; t = TREE_CHAIN (t))
2047 if (no_print_functions && (TREE_CODE (t) == FUNCTION_DECL))
2049 if (no_print_builtins
2050 && (TREE_CODE (t) == TYPE_DECL)
2051 && (!strcmp (DECL_SOURCE_FILE (t),"<built-in>")))
2054 /* Function decls tend to have longer names. */
2055 if (TREE_CODE (t) == FUNCTION_DECL)
2062 fprintf (stderr, "\n\t");
2065 print_node_brief (stderr, "", t, 0);
2066 if (t == error_mark_node)
2070 fprintf (stderr, "\n");
2074 fprintf (stderr, " tags:\t");
2076 for (t = lvl->tags; t; t = TREE_CHAIN (t))
2078 if (TREE_PURPOSE (t) == NULL_TREE)
2080 else if (TREE_PURPOSE (t) == TYPE_IDENTIFIER (TREE_VALUE (t)))
2087 fprintf (stderr, "\n\t");
2090 if (TREE_PURPOSE (t) == NULL_TREE)
2092 print_node_brief (stderr, "<unnamed-typedef", TREE_VALUE (t), 0);
2093 fprintf (stderr, ">");
2095 else if (TREE_PURPOSE (t) == TYPE_IDENTIFIER (TREE_VALUE (t)))
2096 print_node_brief (stderr, "", TREE_VALUE (t), 0);
2099 print_node_brief (stderr, "<typedef", TREE_PURPOSE (t), 0);
2100 print_node_brief (stderr, "", TREE_VALUE (t), 0);
2101 fprintf (stderr, ">");
2105 fprintf (stderr, "\n");
2107 if (lvl->class_shadowed)
2109 fprintf (stderr, " class-shadowed:");
2110 for (t = lvl->class_shadowed; t; t = TREE_CHAIN (t))
2112 fprintf (stderr, " %s ", IDENTIFIER_POINTER (TREE_PURPOSE (t)));
2114 fprintf (stderr, "\n");
2116 if (lvl->type_shadowed)
2118 fprintf (stderr, " type-shadowed:");
2119 for (t = lvl->type_shadowed; t; t = TREE_CHAIN (t))
2121 fprintf (stderr, " %s ", IDENTIFIER_POINTER (TREE_PURPOSE (t)));
2123 fprintf (stderr, "\n");
2128 print_other_binding_stack (stack)
2129 struct binding_level *stack;
2131 struct binding_level *level;
2132 for (level = stack; level != global_binding_level; level = level->level_chain)
2134 fprintf (stderr, "binding level ");
2135 fprintf (stderr, HOST_PTR_PRINTF, level);
2136 fprintf (stderr, "\n");
2137 print_binding_level (level);
2142 print_binding_stack ()
2144 struct binding_level *b;
2145 fprintf (stderr, "current_binding_level=");
2146 fprintf (stderr, HOST_PTR_PRINTF, current_binding_level);
2147 fprintf (stderr, "\nclass_binding_level=");
2148 fprintf (stderr, HOST_PTR_PRINTF, class_binding_level);
2149 fprintf (stderr, "\nglobal_binding_level=");
2150 fprintf (stderr, HOST_PTR_PRINTF, global_binding_level);
2151 fprintf (stderr, "\n");
2152 if (class_binding_level)
2154 for (b = class_binding_level; b; b = b->level_chain)
2155 if (b == current_binding_level)
2158 b = class_binding_level;
2160 b = current_binding_level;
2163 b = current_binding_level;
2164 print_other_binding_stack (b);
2165 fprintf (stderr, "global:\n");
2166 print_binding_level (global_binding_level);
2169 /* Namespace binding access routines: The namespace_bindings field of
2170 the identifier is polymorphic, with three possible values:
2171 NULL_TREE, a list of CPLUS_BINDINGS, or any other tree_node
2172 indicating the BINDING_VALUE of global_namespace. */
2174 /* Check whether the a binding for the name to scope is known.
2175 Assumes that the bindings of the name are already a list
2176 of bindings. Returns the binding found, or NULL_TREE. */
2179 find_binding (name, scope)
2183 tree iter, prev = NULL_TREE;
2185 scope = ORIGINAL_NAMESPACE (scope);
2187 for (iter = IDENTIFIER_NAMESPACE_BINDINGS (name); iter;
2188 iter = TREE_CHAIN (iter))
2190 my_friendly_assert (TREE_CODE (iter) == CPLUS_BINDING, 374);
2191 if (BINDING_SCOPE (iter) == scope)
2193 /* Move binding found to the front of the list, so
2194 subsequent lookups will find it faster. */
2197 TREE_CHAIN (prev) = TREE_CHAIN (iter);
2198 TREE_CHAIN (iter) = IDENTIFIER_NAMESPACE_BINDINGS (name);
2199 IDENTIFIER_NAMESPACE_BINDINGS (name) = iter;
2208 /* Always returns a binding for name in scope. If the
2209 namespace_bindings is not a list, convert it to one first.
2210 If no binding is found, make a new one. */
2213 binding_for_name (name, scope)
2217 tree b = IDENTIFIER_NAMESPACE_BINDINGS (name);
2220 scope = ORIGINAL_NAMESPACE (scope);
2222 if (b && TREE_CODE (b) != CPLUS_BINDING)
2224 /* Get rid of optimization for global scope. */
2225 IDENTIFIER_NAMESPACE_BINDINGS (name) = NULL_TREE;
2226 BINDING_VALUE (binding_for_name (name, global_namespace)) = b;
2227 b = IDENTIFIER_NAMESPACE_BINDINGS (name);
2229 if (b && (result = find_binding (name, scope)))
2231 /* Not found, make a new one. */
2232 result = make_node (CPLUS_BINDING);
2233 TREE_CHAIN (result) = b;
2234 IDENTIFIER_NAMESPACE_BINDINGS (name) = result;
2235 BINDING_SCOPE (result) = scope;
2236 BINDING_TYPE (result) = NULL_TREE;
2237 BINDING_VALUE (result) = NULL_TREE;
2241 /* Return the binding value for name in scope, considering that
2242 namespace_binding may or may not be a list of CPLUS_BINDINGS. */
2245 namespace_binding (name, scope)
2249 tree b = IDENTIFIER_NAMESPACE_BINDINGS (name);
2252 if (scope == NULL_TREE)
2253 scope = global_namespace;
2254 if (TREE_CODE (b) != CPLUS_BINDING)
2255 return (scope == global_namespace) ? b : NULL_TREE;
2256 name = find_binding (name,scope);
2257 if (name == NULL_TREE)
2259 return BINDING_VALUE (name);
2262 /* Set the binding value for name in scope. If modifying the binding
2263 of global_namespace is attempted, try to optimize it. */
2266 set_namespace_binding (name, scope, val)
2273 if (scope == NULL_TREE)
2274 scope = global_namespace;
2276 if (scope == global_namespace)
2278 b = IDENTIFIER_NAMESPACE_BINDINGS (name);
2279 if (b == NULL_TREE || TREE_CODE (b) != CPLUS_BINDING)
2281 IDENTIFIER_NAMESPACE_BINDINGS (name) = val;
2285 b = binding_for_name (name, scope);
2286 BINDING_VALUE (b) = val;
2289 /* Push into the scope of the NAME namespace. If NAME is NULL_TREE, then we
2290 select a name that is unique to this compilation unit. */
2293 push_namespace (name)
2298 int implicit_use = 0;
2300 if (!global_namespace)
2302 /* This must be ::. */
2303 my_friendly_assert (name == get_identifier ("::"), 377);
2308 /* The name of anonymous namespace is unique for the translation
2310 if (!anonymous_namespace_name)
2311 anonymous_namespace_name = get_file_function_name ('N');
2312 name = anonymous_namespace_name;
2313 d = IDENTIFIER_NAMESPACE_VALUE (name);
2315 /* Reopening anonymous namespace. */
2319 else if (current_namespace == global_namespace
2321 && name == std_identifier)
2328 /* Check whether this is an extended namespace definition. */
2329 d = IDENTIFIER_NAMESPACE_VALUE (name);
2330 if (d != NULL_TREE && TREE_CODE (d) == NAMESPACE_DECL)
2333 if (DECL_NAMESPACE_ALIAS (d))
2335 cp_error ("namespace alias `%D' not allowed here, assuming `%D'",
2336 d, DECL_NAMESPACE_ALIAS (d));
2337 d = DECL_NAMESPACE_ALIAS (d);
2344 /* Make a new namespace, binding the name to it. */
2345 d = build_lang_decl (NAMESPACE_DECL, name, void_type_node);
2346 /* The global namespace is not pushed, and the global binding
2347 level is set elsewhere. */
2350 DECL_CONTEXT (d) = FROB_CONTEXT (current_namespace);
2353 declare_namespace_level ();
2354 NAMESPACE_LEVEL (d) = current_binding_level;
2358 resume_binding_level (NAMESPACE_LEVEL (d));
2361 do_using_directive (d);
2362 /* Enter the name space. */
2363 current_namespace = d;
2366 /* Pop from the scope of the current namespace. */
2371 if (current_namespace == global_namespace)
2373 my_friendly_assert (in_fake_std > 0, 980421);
2377 current_namespace = CP_DECL_CONTEXT (current_namespace);
2378 /* The binding level is not popped, as it might be re-opened later. */
2379 suspend_binding_level ();
2382 /* Push into the scope of the namespace NS, even if it is deeply
2383 nested within another namespace. */
2386 push_nested_namespace (ns)
2389 if (ns == global_namespace)
2390 push_to_top_level ();
2393 push_nested_namespace (CP_DECL_CONTEXT (ns));
2394 push_namespace (DECL_NAME (ns));
2398 /* Pop back from the scope of the namespace NS, which was previously
2399 entered with push_nested_namespace. */
2402 pop_nested_namespace (ns)
2405 while (ns != global_namespace)
2408 ns = CP_DECL_CONTEXT (ns);
2411 pop_from_top_level ();
2415 /* Subroutines for reverting temporarily to top-level for instantiation
2416 of templates and such. We actually need to clear out the class- and
2417 local-value slots of all identifiers, so that only the global values
2418 are at all visible. Simply setting current_binding_level to the global
2419 scope isn't enough, because more binding levels may be pushed. */
2420 struct saved_scope *scope_chain;
2422 /* Mark ARG (which is really a struct saved_scope **) for GC. */
2425 mark_saved_scope (arg)
2428 struct saved_scope *t = *(struct saved_scope **)arg;
2431 mark_binding_level (&t->class_bindings);
2432 ggc_mark_tree (t->old_bindings);
2433 ggc_mark_tree (t->old_namespace);
2434 ggc_mark_tree (t->class_name);
2435 ggc_mark_tree (t->class_type);
2436 ggc_mark_tree (t->access_specifier);
2437 ggc_mark_tree (t->function_decl);
2439 ggc_mark_tree_varray (t->lang_base);
2440 ggc_mark_tree (t->lang_name);
2441 ggc_mark_tree (t->template_parms);
2442 ggc_mark_tree (t->x_previous_class_type);
2443 ggc_mark_tree (t->x_previous_class_values);
2444 ggc_mark_tree (t->x_saved_tree);
2445 ggc_mark_tree (t->incomplete);
2446 ggc_mark_tree (t->lookups);
2448 mark_stmt_tree (&t->x_stmt_tree);
2449 mark_binding_level (&t->bindings);
2455 store_bindings (names, old_bindings)
2456 tree names, old_bindings;
2459 for (t = names; t; t = TREE_CHAIN (t))
2461 tree binding, t1, id;
2463 if (TREE_CODE (t) == TREE_LIST)
2464 id = TREE_PURPOSE (t);
2469 /* Note that we may have an IDENTIFIER_CLASS_VALUE even when
2470 we have no IDENTIFIER_BINDING if we have left the class
2471 scope, but cached the class-level declarations. */
2472 || !(IDENTIFIER_BINDING (id) || IDENTIFIER_CLASS_VALUE (id)))
2475 for (t1 = old_bindings; t1; t1 = TREE_CHAIN (t1))
2476 if (TREE_VEC_ELT (t1, 0) == id)
2479 binding = make_tree_vec (4);
2483 my_friendly_assert (TREE_CODE (id) == IDENTIFIER_NODE, 135);
2484 TREE_VEC_ELT (binding, 0) = id;
2485 TREE_VEC_ELT (binding, 1) = REAL_IDENTIFIER_TYPE_VALUE (id);
2486 TREE_VEC_ELT (binding, 2) = IDENTIFIER_BINDING (id);
2487 TREE_VEC_ELT (binding, 3) = IDENTIFIER_CLASS_VALUE (id);
2488 IDENTIFIER_BINDING (id) = NULL_TREE;
2489 IDENTIFIER_CLASS_VALUE (id) = NULL_TREE;
2491 TREE_CHAIN (binding) = old_bindings;
2492 old_bindings = binding;
2496 return old_bindings;
2500 maybe_push_to_top_level (pseudo)
2503 struct saved_scope *s;
2504 struct binding_level *b;
2508 s = (struct saved_scope *) xcalloc (1, sizeof (struct saved_scope));
2510 b = scope_chain ? current_binding_level : 0;
2512 /* If we're in the middle of some function, save our state. */
2516 push_function_context_to (NULL_TREE);
2521 old_bindings = NULL_TREE;
2522 if (scope_chain && previous_class_type)
2523 old_bindings = store_bindings (previous_class_values, old_bindings);
2525 /* Have to include global_binding_level, because class-level decls
2526 aren't listed anywhere useful. */
2527 for (; b; b = b->level_chain)
2531 /* Template IDs are inserted into the global level. If they were
2532 inserted into namespace level, finish_file wouldn't find them
2533 when doing pending instantiations. Therefore, don't stop at
2534 namespace level, but continue until :: . */
2535 if (b == global_binding_level || (pseudo && b->template_parms_p))
2538 old_bindings = store_bindings (b->names, old_bindings);
2539 /* We also need to check class_shadowed to save class-level type
2540 bindings, since pushclass doesn't fill in b->names. */
2541 if (b->parm_flag == 2)
2542 old_bindings = store_bindings (b->class_shadowed, old_bindings);
2544 /* Unwind type-value slots back to top level. */
2545 for (t = b->type_shadowed; t; t = TREE_CHAIN (t))
2546 SET_IDENTIFIER_TYPE_VALUE (TREE_PURPOSE (t), TREE_VALUE (t));
2548 s->prev = scope_chain;
2549 s->old_bindings = old_bindings;
2551 s->need_pop_function_context = need_pop;
2552 s->function_decl = current_function_decl;
2555 current_function_decl = NULL_TREE;
2556 VARRAY_TREE_INIT (current_lang_base, 10, "current_lang_base");
2557 current_lang_stack = &VARRAY_TREE (current_lang_base, 0);
2558 current_lang_name = lang_name_cplusplus;
2559 current_namespace = global_namespace;
2563 push_to_top_level ()
2565 maybe_push_to_top_level (0);
2569 pop_from_top_level ()
2571 struct saved_scope *s = scope_chain;
2574 /* Clear out class-level bindings cache. */
2575 if (previous_class_type)
2576 invalidate_class_lookup_cache ();
2578 VARRAY_FREE (current_lang_base);
2580 scope_chain = s->prev;
2581 for (t = s->old_bindings; t; t = TREE_CHAIN (t))
2583 tree id = TREE_VEC_ELT (t, 0);
2586 SET_IDENTIFIER_TYPE_VALUE (id, TREE_VEC_ELT (t, 1));
2587 IDENTIFIER_BINDING (id) = TREE_VEC_ELT (t, 2);
2588 IDENTIFIER_CLASS_VALUE (id) = TREE_VEC_ELT (t, 3);
2592 /* If we were in the middle of compiling a function, restore our
2594 if (s->need_pop_function_context)
2595 pop_function_context_from (NULL_TREE);
2596 current_function_decl = s->function_decl;
2601 /* Push a definition of struct, union or enum tag "name".
2602 into binding_level "b". "type" should be the type node,
2603 We assume that the tag "name" is not already defined.
2605 Note that the definition may really be just a forward reference.
2606 In that case, the TYPE_SIZE will be a NULL_TREE.
2608 C++ gratuitously puts all these tags in the name space. */
2610 /* When setting the IDENTIFIER_TYPE_VALUE field of an identifier ID,
2611 record the shadowed value for this binding contour. TYPE is
2612 the type that ID maps to. */
2615 set_identifier_type_value_with_scope (id, type, b)
2618 struct binding_level *b;
2620 if (!b->namespace_p)
2622 /* Shadow the marker, not the real thing, so that the marker
2623 gets restored later. */
2624 tree old_type_value = REAL_IDENTIFIER_TYPE_VALUE (id);
2626 = tree_cons (id, old_type_value, b->type_shadowed);
2630 tree binding = binding_for_name (id, current_namespace);
2631 BINDING_TYPE (binding) = type;
2632 /* Store marker instead of real type. */
2633 type = global_type_node;
2635 SET_IDENTIFIER_TYPE_VALUE (id, type);
2638 /* As set_identifier_type_value_with_scope, but using current_binding_level. */
2641 set_identifier_type_value (id, type)
2645 set_identifier_type_value_with_scope (id, type, current_binding_level);
2648 /* Return the type associated with id. */
2651 identifier_type_value (id)
2654 /* There is no type with that name, anywhere. */
2655 if (REAL_IDENTIFIER_TYPE_VALUE (id) == NULL_TREE)
2657 /* This is not the type marker, but the real thing. */
2658 if (REAL_IDENTIFIER_TYPE_VALUE (id) != global_type_node)
2659 return REAL_IDENTIFIER_TYPE_VALUE (id);
2660 /* Have to search for it. It must be on the global level, now.
2661 Ask lookup_name not to return non-types. */
2662 id = lookup_name_real (id, 2, 1, 0);
2664 return TREE_TYPE (id);
2668 /* Pop off extraneous binding levels left over due to syntax errors.
2670 We don't pop past namespaces, as they might be valid. */
2675 #ifdef DEBUG_CP_BINDING_LEVELS
2676 fprintf (stderr, "XXX entering pop_everything ()\n");
2678 while (!toplevel_bindings_p ())
2680 if (current_binding_level->parm_flag == 2)
2681 pop_nested_class ();
2685 #ifdef DEBUG_CP_BINDING_LEVELS
2686 fprintf (stderr, "XXX leaving pop_everything ()\n");
2690 /* The type TYPE is being declared. If it is a class template, or a
2691 specialization of a class template, do any processing required and
2692 perform error-checking. If IS_FRIEND is non-zero, this TYPE is
2693 being declared a friend. B is the binding level at which this TYPE
2696 Returns the TYPE_DECL for TYPE, which may have been altered by this
2700 maybe_process_template_type_declaration (type, globalize, b)
2703 struct binding_level* b;
2705 tree decl = TYPE_NAME (type);
2707 if (processing_template_parmlist)
2708 /* You can't declare a new template type in a template parameter
2709 list. But, you can declare a non-template type:
2711 template <class A*> struct S;
2713 is a forward-declaration of `A'. */
2717 maybe_check_template_type (type);
2719 my_friendly_assert (IS_AGGR_TYPE (type)
2720 || TREE_CODE (type) == ENUMERAL_TYPE, 0);
2723 if (processing_template_decl)
2725 /* This may change after the call to
2726 push_template_decl_real, but we want the original value. */
2727 tree name = DECL_NAME (decl);
2729 decl = push_template_decl_real (decl, globalize);
2730 /* If the current binding level is the binding level for the
2731 template parameters (see the comment in
2732 begin_template_parm_list) and the enclosing level is a class
2733 scope, and we're not looking at a friend, push the
2734 declaration of the member class into the class scope. In the
2735 friend case, push_template_decl will already have put the
2736 friend into global scope, if appropriate. */
2737 if (TREE_CODE (type) != ENUMERAL_TYPE
2738 && !globalize && b->template_parms_p
2739 && b->level_chain->parm_flag == 2)
2741 finish_member_declaration (CLASSTYPE_TI_TEMPLATE (type));
2742 /* Put this tag on the list of tags for the class, since
2743 that won't happen below because B is not the class
2744 binding level, but is instead the pseudo-global level. */
2745 b->level_chain->tags =
2746 tree_cons (name, type, b->level_chain->tags);
2747 if (!COMPLETE_TYPE_P (current_class_type))
2748 CLASSTYPE_TAGS (current_class_type) = b->level_chain->tags;
2756 /* In C++, you don't have to write `struct S' to refer to `S'; you
2757 can just use `S'. We accomplish this by creating a TYPE_DECL as
2758 if the user had written `typedef struct S S'. Create and return
2759 the TYPE_DECL for TYPE. */
2762 create_implicit_typedef (name, type)
2768 decl = build_decl (TYPE_DECL, name, type);
2769 DECL_ARTIFICIAL (decl) = 1;
2770 /* There are other implicit type declarations, like the one *within*
2771 a class that allows you to write `S::S'. We must distinguish
2773 SET_DECL_IMPLICIT_TYPEDEF_P (decl);
2774 TYPE_NAME (type) = decl;
2779 /* Push a tag name NAME for struct/class/union/enum type TYPE.
2780 Normally put it into the inner-most non-tag-transparent scope,
2781 but if GLOBALIZE is true, put it in the inner-most non-class scope.
2782 The latter is needed for implicit declarations. */
2785 pushtag (name, type, globalize)
2789 register struct binding_level *b;
2791 b = current_binding_level;
2792 while (b->tag_transparent
2793 || (globalize && b->parm_flag == 2))
2796 b->tags = tree_cons (name, type, b->tags);
2800 /* Do C++ gratuitous typedefing. */
2801 if (IDENTIFIER_TYPE_VALUE (name) != type)
2803 register tree d = NULL_TREE;
2805 tree context = TYPE_CONTEXT (type);
2809 tree cs = current_scope ();
2813 else if (cs != NULL_TREE && TYPE_P (cs))
2814 /* When declaring a friend class of a local class, we want
2815 to inject the newly named class into the scope
2816 containing the local class, not the namespace scope. */
2817 context = decl_function_context (get_type_decl (cs));
2820 context = current_namespace;
2822 if ((b->template_parms_p && b->level_chain->parm_flag == 2)
2823 || b->parm_flag == 2)
2826 if (current_lang_name == lang_name_java)
2827 TYPE_FOR_JAVA (type) = 1;
2829 d = create_implicit_typedef (name, type);
2830 DECL_CONTEXT (d) = FROB_CONTEXT (context);
2832 set_identifier_type_value_with_scope (name, type, b);
2834 d = maybe_process_template_type_declaration (type,
2837 if (b->parm_flag == 2)
2839 if (!PROCESSING_REAL_TEMPLATE_DECL_P ())
2840 /* Put this TYPE_DECL on the TYPE_FIELDS list for the
2841 class. But if it's a member template class, we
2842 want the TEMPLATE_DECL, not the TYPE_DECL, so this
2844 finish_member_declaration (d);
2846 pushdecl_class_level (d);
2849 d = pushdecl_with_scope (d, b);
2851 if (ANON_AGGRNAME_P (name))
2852 DECL_IGNORED_P (d) = 1;
2854 TYPE_CONTEXT (type) = DECL_CONTEXT (d);
2855 DECL_ASSEMBLER_NAME (d) = DECL_NAME (d);
2857 /* If this is a local class, keep track of it. We need this
2858 information for name-mangling, and so that it is possible to find
2859 all function definitions in a translation unit in a convenient
2860 way. (It's otherwise tricky to find a member function definition
2861 it's only pointed to from within a local class.) */
2862 if (TYPE_CONTEXT (type)
2863 && TREE_CODE (TYPE_CONTEXT (type)) == FUNCTION_DECL
2864 && !processing_template_decl)
2865 VARRAY_PUSH_TREE (local_classes, type);
2867 if (!uses_template_parms (type))
2870 DECL_ASSEMBLER_NAME (d) = mangle_type (type);
2872 DECL_ASSEMBLER_NAME (d)
2873 = get_identifier (build_overload_name (type, 1, 1));
2876 if (b->parm_flag == 2)
2878 if (!COMPLETE_TYPE_P (current_class_type))
2879 CLASSTYPE_TAGS (current_class_type) = b->tags;
2883 if (TREE_CODE (TYPE_NAME (type)) == TYPE_DECL)
2884 /* Use the canonical TYPE_DECL for this node. */
2885 TYPE_STUB_DECL (type) = TYPE_NAME (type);
2888 /* Create a fake NULL-named TYPE_DECL node whose TREE_TYPE
2889 will be the tagged type we just added to the current
2890 binding level. This fake NULL-named TYPE_DECL node helps
2891 dwarfout.c to know when it needs to output a
2892 representation of a tagged type, and it also gives us a
2893 convenient place to record the "scope start" address for
2896 tree d = build_decl (TYPE_DECL, NULL_TREE, type);
2897 TYPE_STUB_DECL (type) = pushdecl_with_scope (d, b);
2901 /* Counter used to create anonymous type names. */
2903 static int anon_cnt = 0;
2905 /* Return an IDENTIFIER which can be used as a name for
2906 anonymous structs and unions. */
2913 sprintf (buf, ANON_AGGRNAME_FORMAT, anon_cnt++);
2914 return get_identifier (buf);
2917 /* Clear the TREE_PURPOSE slot of tags which have anonymous typenames.
2918 This keeps dbxout from getting confused. */
2923 register struct binding_level *b;
2925 static int last_cnt = 0;
2927 /* Fast out if no new anon names were declared. */
2928 if (last_cnt == anon_cnt)
2931 b = current_binding_level;
2932 while (b->tag_transparent)
2937 /* A NULL purpose means we have already processed all tags
2938 from here to the end of the list. */
2939 if (TREE_PURPOSE (tags) == NULL_TREE)
2941 if (ANON_AGGRNAME_P (TREE_PURPOSE (tags)))
2942 TREE_PURPOSE (tags) = NULL_TREE;
2943 tags = TREE_CHAIN (tags);
2945 last_cnt = anon_cnt;
2948 /* Subroutine of duplicate_decls: return truthvalue of whether
2949 or not types of these decls match.
2951 For C++, we must compare the parameter list so that `int' can match
2952 `int&' in a parameter position, but `int&' is not confused with
2956 decls_match (newdecl, olddecl)
2957 tree newdecl, olddecl;
2961 if (newdecl == olddecl)
2964 if (TREE_CODE (newdecl) != TREE_CODE (olddecl))
2965 /* If the two DECLs are not even the same kind of thing, we're not
2966 interested in their types. */
2969 if (TREE_CODE (newdecl) == FUNCTION_DECL)
2971 tree f1 = TREE_TYPE (newdecl);
2972 tree f2 = TREE_TYPE (olddecl);
2973 tree p1 = TYPE_ARG_TYPES (f1);
2974 tree p2 = TYPE_ARG_TYPES (f2);
2976 if (CP_DECL_CONTEXT (newdecl) != CP_DECL_CONTEXT (olddecl)
2977 && ! (DECL_EXTERN_C_P (newdecl)
2978 && DECL_EXTERN_C_P (olddecl)))
2981 if (TREE_CODE (f1) != TREE_CODE (f2))
2984 if (same_type_p (TREE_TYPE (f1), TREE_TYPE (f2)))
2986 if (p2 == NULL_TREE && DECL_EXTERN_C_P (olddecl)
2987 && (DECL_BUILT_IN (olddecl)
2988 #ifndef NO_IMPLICIT_EXTERN_C
2989 || (DECL_IN_SYSTEM_HEADER (newdecl) && !DECL_CLASS_SCOPE_P (newdecl))
2990 || (DECL_IN_SYSTEM_HEADER (olddecl) && !DECL_CLASS_SCOPE_P (olddecl))
2994 types_match = self_promoting_args_p (p1);
2995 if (p1 == void_list_node)
2996 TREE_TYPE (newdecl) = TREE_TYPE (olddecl);
2998 #ifndef NO_IMPLICIT_EXTERN_C
2999 else if (p1 == NULL_TREE
3000 && (DECL_EXTERN_C_P (olddecl)
3001 && DECL_IN_SYSTEM_HEADER (olddecl)
3002 && !DECL_CLASS_SCOPE_P (olddecl))
3003 && (DECL_EXTERN_C_P (newdecl)
3004 && DECL_IN_SYSTEM_HEADER (newdecl)
3005 && !DECL_CLASS_SCOPE_P (newdecl)))
3007 types_match = self_promoting_args_p (p2);
3008 TREE_TYPE (newdecl) = TREE_TYPE (olddecl);
3012 types_match = compparms (p1, p2);
3017 else if (TREE_CODE (newdecl) == TEMPLATE_DECL)
3019 if (!comp_template_parms (DECL_TEMPLATE_PARMS (newdecl),
3020 DECL_TEMPLATE_PARMS (olddecl)))
3023 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl))
3024 != TREE_CODE (DECL_TEMPLATE_RESULT (olddecl)))
3027 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == TYPE_DECL)
3030 types_match = decls_match (DECL_TEMPLATE_RESULT (olddecl),
3031 DECL_TEMPLATE_RESULT (newdecl));
3035 if (TREE_TYPE (newdecl) == error_mark_node)
3036 types_match = TREE_TYPE (olddecl) == error_mark_node;
3037 else if (TREE_TYPE (olddecl) == NULL_TREE)
3038 types_match = TREE_TYPE (newdecl) == NULL_TREE;
3039 else if (TREE_TYPE (newdecl) == NULL_TREE)
3042 types_match = comptypes (TREE_TYPE (newdecl),
3043 TREE_TYPE (olddecl),
3044 COMPARE_REDECLARATION);
3050 /* If NEWDECL is `static' and an `extern' was seen previously,
3051 warn about it. OLDDECL is the previous declaration.
3053 Note that this does not apply to the C++ case of declaring
3054 a variable `extern const' and then later `const'.
3056 Don't complain about built-in functions, since they are beyond
3057 the user's control. */
3060 warn_extern_redeclared_static (newdecl, olddecl)
3061 tree newdecl, olddecl;
3063 static const char *explicit_extern_static_warning
3064 = "`%D' was declared `extern' and later `static'";
3065 static const char *implicit_extern_static_warning
3066 = "`%D' was declared implicitly `extern' and later `static'";
3070 if (TREE_CODE (newdecl) == TYPE_DECL
3071 || TREE_CODE (newdecl) == TEMPLATE_DECL
3072 || TREE_CODE (newdecl) == CONST_DECL)
3075 /* Don't get confused by static member functions; that's a different
3077 if (TREE_CODE (newdecl) == FUNCTION_DECL
3078 && DECL_STATIC_FUNCTION_P (newdecl))
3081 /* If the old declaration was `static', or the new one isn't, then
3082 then everything is OK. */
3083 if (DECL_THIS_STATIC (olddecl) || !DECL_THIS_STATIC (newdecl))
3086 /* It's OK to declare a builtin function as `static'. */
3087 if (TREE_CODE (olddecl) == FUNCTION_DECL
3088 && DECL_ARTIFICIAL (olddecl))
3091 name = DECL_ASSEMBLER_NAME (newdecl);
3092 cp_pedwarn (IDENTIFIER_IMPLICIT_DECL (name)
3093 ? implicit_extern_static_warning
3094 : explicit_extern_static_warning, newdecl);
3095 cp_pedwarn_at ("previous declaration of `%D'", olddecl);
3098 /* Handle when a new declaration NEWDECL has the same name as an old
3099 one OLDDECL in the same binding contour. Prints an error message
3102 If safely possible, alter OLDDECL to look like NEWDECL, and return 1.
3103 Otherwise, return 0. */
3106 duplicate_decls (newdecl, olddecl)
3107 tree newdecl, olddecl;
3109 unsigned olddecl_uid = DECL_UID (olddecl);
3110 int olddecl_friend = 0, types_match = 0;
3111 int new_defines_function = 0;
3113 if (newdecl == olddecl)
3116 types_match = decls_match (newdecl, olddecl);
3118 /* If either the type of the new decl or the type of the old decl is an
3119 error_mark_node, then that implies that we have already issued an
3120 error (earlier) for some bogus type specification, and in that case,
3121 it is rather pointless to harass the user with yet more error message
3122 about the same declaration, so just pretend the types match here. */
3123 if (TREE_TYPE (newdecl) == error_mark_node
3124 || TREE_TYPE (olddecl) == error_mark_node)
3127 /* Check for redeclaration and other discrepancies. */
3128 if (TREE_CODE (olddecl) == FUNCTION_DECL
3129 && DECL_ARTIFICIAL (olddecl))
3131 if (TREE_CODE (newdecl) != FUNCTION_DECL)
3133 /* If you declare a built-in or predefined function name as static,
3134 the old definition is overridden, but optionally warn this was a
3135 bad choice of name. */
3136 if (! TREE_PUBLIC (newdecl))
3139 cp_warning ("shadowing %s function `%#D'",
3140 DECL_BUILT_IN (olddecl) ? "built-in" : "library",
3142 /* Discard the old built-in function. */
3145 /* If the built-in is not ansi, then programs can override
3146 it even globally without an error. */
3147 else if (! DECL_BUILT_IN (olddecl))
3148 cp_warning ("library function `%#D' redeclared as non-function `%#D'",
3152 cp_error ("declaration of `%#D'", newdecl);
3153 cp_error ("conflicts with built-in declaration `%#D'",
3158 else if (!types_match)
3160 if ((DECL_EXTERN_C_P (newdecl)
3161 && DECL_EXTERN_C_P (olddecl))
3162 || compparms (TYPE_ARG_TYPES (TREE_TYPE (newdecl)),
3163 TYPE_ARG_TYPES (TREE_TYPE (olddecl))))
3165 /* A near match; override the builtin. */
3167 if (TREE_PUBLIC (newdecl))
3169 cp_warning ("new declaration `%#D'", newdecl);
3170 cp_warning ("ambiguates built-in declaration `%#D'",
3173 else if (warn_shadow)
3174 cp_warning ("shadowing %s function `%#D'",
3175 DECL_BUILT_IN (olddecl) ? "built-in" : "library",
3179 /* Discard the old built-in function. */
3183 if (DECL_THIS_STATIC (newdecl) && !DECL_THIS_STATIC (olddecl))
3185 /* If a builtin function is redeclared as `static', merge
3186 the declarations, but make the original one static. */
3187 DECL_THIS_STATIC (olddecl) = 1;
3188 TREE_PUBLIC (olddecl) = 0;
3190 /* Make the old declaration consistent with the new one so
3191 that all remnants of the builtin-ness of this function
3192 will be banished. */
3193 DECL_LANGUAGE (olddecl) = DECL_LANGUAGE (newdecl);
3194 DECL_RTL (olddecl) = DECL_RTL (newdecl);
3195 DECL_ASSEMBLER_NAME (olddecl) = DECL_ASSEMBLER_NAME (newdecl);
3196 SET_IDENTIFIER_GLOBAL_VALUE (DECL_ASSEMBLER_NAME (newdecl),
3200 else if (TREE_CODE (olddecl) != TREE_CODE (newdecl))
3202 if ((TREE_CODE (olddecl) == TYPE_DECL && DECL_ARTIFICIAL (olddecl)
3203 && TREE_CODE (newdecl) != TYPE_DECL
3204 && ! (TREE_CODE (newdecl) == TEMPLATE_DECL
3205 && TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == TYPE_DECL))
3206 || (TREE_CODE (newdecl) == TYPE_DECL && DECL_ARTIFICIAL (newdecl)
3207 && TREE_CODE (olddecl) != TYPE_DECL
3208 && ! (TREE_CODE (olddecl) == TEMPLATE_DECL
3209 && (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl))
3212 /* We do nothing special here, because C++ does such nasty
3213 things with TYPE_DECLs. Instead, just let the TYPE_DECL
3214 get shadowed, and know that if we need to find a TYPE_DECL
3215 for a given name, we can look in the IDENTIFIER_TYPE_VALUE
3216 slot of the identifier. */
3220 if ((TREE_CODE (newdecl) == FUNCTION_DECL
3221 && DECL_FUNCTION_TEMPLATE_P (olddecl))
3222 || (TREE_CODE (olddecl) == FUNCTION_DECL
3223 && DECL_FUNCTION_TEMPLATE_P (newdecl)))
3226 cp_error ("`%#D' redeclared as different kind of symbol", newdecl);
3227 if (TREE_CODE (olddecl) == TREE_LIST)
3228 olddecl = TREE_VALUE (olddecl);
3229 cp_error_at ("previous declaration of `%#D'", olddecl);
3231 /* New decl is completely inconsistent with the old one =>
3232 tell caller to replace the old one. */
3236 else if (!types_match)
3238 if (CP_DECL_CONTEXT (newdecl) != CP_DECL_CONTEXT (olddecl))
3239 /* These are certainly not duplicate declarations; they're
3240 from different scopes. */
3243 if (TREE_CODE (newdecl) == TEMPLATE_DECL)
3245 /* The name of a class template may not be declared to refer to
3246 any other template, class, function, object, namespace, value,
3247 or type in the same scope. */
3248 if (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl)) == TYPE_DECL
3249 || TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == TYPE_DECL)
3251 cp_error ("declaration of template `%#D'", newdecl);
3252 cp_error_at ("conflicts with previous declaration `%#D'",
3255 else if (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl)) == FUNCTION_DECL
3256 && TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == FUNCTION_DECL
3257 && compparms (TYPE_ARG_TYPES (TREE_TYPE (DECL_TEMPLATE_RESULT (olddecl))),
3258 TYPE_ARG_TYPES (TREE_TYPE (DECL_TEMPLATE_RESULT (newdecl))))
3259 && comp_template_parms (DECL_TEMPLATE_PARMS (newdecl),
3260 DECL_TEMPLATE_PARMS (olddecl)))
3262 cp_error ("new declaration `%#D'", newdecl);
3263 cp_error_at ("ambiguates old declaration `%#D'", olddecl);
3267 if (TREE_CODE (newdecl) == FUNCTION_DECL)
3269 if (DECL_EXTERN_C_P (newdecl) && DECL_EXTERN_C_P (olddecl))
3271 cp_error ("declaration of C function `%#D' conflicts with",
3273 cp_error_at ("previous declaration `%#D' here", olddecl);
3275 else if (compparms (TYPE_ARG_TYPES (TREE_TYPE (newdecl)),
3276 TYPE_ARG_TYPES (TREE_TYPE (olddecl))))
3278 cp_error ("new declaration `%#D'", newdecl);
3279 cp_error_at ("ambiguates old declaration `%#D'", olddecl);
3285 /* Already complained about this, so don't do so again. */
3286 else if (current_class_type == NULL_TREE
3287 || IDENTIFIER_ERROR_LOCUS (DECL_ASSEMBLER_NAME (newdecl)) != current_class_type)
3289 cp_error ("conflicting types for `%#D'", newdecl);
3290 cp_error_at ("previous declaration as `%#D'", olddecl);
3293 else if (TREE_CODE (newdecl) == FUNCTION_DECL
3294 && ((DECL_TEMPLATE_SPECIALIZATION (olddecl)
3295 && (!DECL_TEMPLATE_INFO (newdecl)
3296 || (DECL_TI_TEMPLATE (newdecl)
3297 != DECL_TI_TEMPLATE (olddecl))))
3298 || (DECL_TEMPLATE_SPECIALIZATION (newdecl)
3299 && (!DECL_TEMPLATE_INFO (olddecl)
3300 || (DECL_TI_TEMPLATE (olddecl)
3301 != DECL_TI_TEMPLATE (newdecl))))))
3302 /* It's OK to have a template specialization and a non-template
3303 with the same type, or to have specializations of two
3304 different templates with the same type. Note that if one is a
3305 specialization, and the other is an instantiation of the same
3306 template, that we do not exit at this point. That situation
3307 can occur if we instantiate a template class, and then
3308 specialize one of its methods. This situation is legal, but
3309 the declarations must be merged in the usual way. */
3311 else if (TREE_CODE (newdecl) == FUNCTION_DECL
3312 && ((DECL_TEMPLATE_INSTANTIATION (olddecl)
3313 && !DECL_USE_TEMPLATE (newdecl))
3314 || (DECL_TEMPLATE_INSTANTIATION (newdecl)
3315 && !DECL_USE_TEMPLATE (olddecl))))
3316 /* One of the declarations is a template instantiation, and the
3317 other is not a template at all. That's OK. */
3319 else if (TREE_CODE (newdecl) == NAMESPACE_DECL
3320 && DECL_NAMESPACE_ALIAS (newdecl)
3321 && DECL_NAMESPACE_ALIAS (newdecl) == DECL_NAMESPACE_ALIAS (olddecl))
3322 /* Redeclaration of namespace alias, ignore it. */
3326 const char *errmsg = redeclaration_error_message (newdecl, olddecl);
3329 cp_error (errmsg, newdecl);
3330 if (DECL_NAME (olddecl) != NULL_TREE)
3331 cp_error_at ((DECL_INITIAL (olddecl)
3332 && namespace_bindings_p ())
3333 ? "`%#D' previously defined here"
3334 : "`%#D' previously declared here", olddecl);
3336 else if (TREE_CODE (olddecl) == FUNCTION_DECL
3337 && DECL_INITIAL (olddecl) != NULL_TREE
3338 && TYPE_ARG_TYPES (TREE_TYPE (olddecl)) == NULL_TREE
3339 && TYPE_ARG_TYPES (TREE_TYPE (newdecl)) != NULL_TREE)
3341 /* Prototype decl follows defn w/o prototype. */
3342 cp_warning_at ("prototype for `%#D'", newdecl);
3343 cp_warning_at ("follows non-prototype definition here", olddecl);
3345 else if (TREE_CODE (olddecl) == FUNCTION_DECL
3346 && DECL_LANGUAGE (newdecl) != DECL_LANGUAGE (olddecl))
3348 /* extern "C" int foo ();
3349 int foo () { bar (); }
3351 if (current_lang_stack
3352 == &VARRAY_TREE (current_lang_base, 0))
3353 DECL_LANGUAGE (newdecl) = DECL_LANGUAGE (olddecl);
3356 cp_error_at ("previous declaration of `%#D' with %L linkage",
3357 olddecl, DECL_LANGUAGE (olddecl));
3358 cp_error ("conflicts with new declaration with %L linkage",
3359 DECL_LANGUAGE (newdecl));
3363 if (DECL_LANG_SPECIFIC (olddecl) && DECL_USE_TEMPLATE (olddecl))
3365 else if (TREE_CODE (olddecl) == FUNCTION_DECL)
3367 tree t1 = TYPE_ARG_TYPES (TREE_TYPE (olddecl));
3368 tree t2 = TYPE_ARG_TYPES (TREE_TYPE (newdecl));
3371 if (TREE_CODE (TREE_TYPE (newdecl)) == METHOD_TYPE)
3372 t1 = TREE_CHAIN (t1), t2 = TREE_CHAIN (t2);
3374 for (; t1 && t1 != void_list_node;
3375 t1 = TREE_CHAIN (t1), t2 = TREE_CHAIN (t2), i++)
3376 if (TREE_PURPOSE (t1) && TREE_PURPOSE (t2))
3378 if (1 == simple_cst_equal (TREE_PURPOSE (t1),
3383 cp_pedwarn ("default argument given for parameter %d of `%#D'",
3385 cp_pedwarn_at ("after previous specification in `%#D'",
3391 cp_error ("default argument given for parameter %d of `%#D'",
3393 cp_error_at ("after previous specification in `%#D'",
3398 if (DECL_THIS_INLINE (newdecl) && ! DECL_THIS_INLINE (olddecl)
3399 && TREE_ADDRESSABLE (olddecl) && warn_inline)
3401 cp_warning ("`%#D' was used before it was declared inline",
3403 cp_warning_at ("previous non-inline declaration here",
3409 /* If new decl is `static' and an `extern' was seen previously,
3411 warn_extern_redeclared_static (newdecl, olddecl);
3413 /* We have committed to returning 1 at this point. */
3414 if (TREE_CODE (newdecl) == FUNCTION_DECL)
3416 /* Now that functions must hold information normally held
3417 by field decls, there is extra work to do so that
3418 declaration information does not get destroyed during
3420 if (DECL_VINDEX (olddecl))
3421 DECL_VINDEX (newdecl) = DECL_VINDEX (olddecl);
3422 if (DECL_VIRTUAL_CONTEXT (olddecl))
3423 DECL_VIRTUAL_CONTEXT (newdecl) = DECL_VIRTUAL_CONTEXT (olddecl);
3424 if (DECL_CONTEXT (olddecl))
3425 DECL_CONTEXT (newdecl) = DECL_CONTEXT (olddecl);
3426 if (DECL_PENDING_INLINE_INFO (newdecl) == 0)
3427 DECL_PENDING_INLINE_INFO (newdecl) = DECL_PENDING_INLINE_INFO (olddecl);
3428 DECL_STATIC_CONSTRUCTOR (newdecl) |= DECL_STATIC_CONSTRUCTOR (olddecl);
3429 DECL_STATIC_DESTRUCTOR (newdecl) |= DECL_STATIC_DESTRUCTOR (olddecl);
3430 DECL_PURE_VIRTUAL_P (newdecl) |= DECL_PURE_VIRTUAL_P (olddecl);
3431 DECL_VIRTUAL_P (newdecl) |= DECL_VIRTUAL_P (olddecl);
3432 DECL_NEEDS_FINAL_OVERRIDER_P (newdecl) |= DECL_NEEDS_FINAL_OVERRIDER_P (olddecl);
3433 DECL_THIS_STATIC (newdecl) |= DECL_THIS_STATIC (olddecl);
3434 DECL_LANG_SPECIFIC (newdecl)->u2 = DECL_LANG_SPECIFIC (olddecl)->u2;
3435 new_defines_function = DECL_INITIAL (newdecl) != NULL_TREE;
3437 /* Optionally warn about more than one declaration for the same
3438 name, but don't warn about a function declaration followed by a
3440 if (warn_redundant_decls && ! DECL_ARTIFICIAL (olddecl)
3441 && !(new_defines_function && DECL_INITIAL (olddecl) == NULL_TREE)
3442 /* Don't warn about extern decl followed by definition. */
3443 && !(DECL_EXTERNAL (olddecl) && ! DECL_EXTERNAL (newdecl))
3444 /* Don't warn about friends, let add_friend take care of it. */
3445 && ! DECL_FRIEND_P (newdecl))
3447 cp_warning ("redundant redeclaration of `%D' in same scope", newdecl);
3448 cp_warning_at ("previous declaration of `%D'", olddecl);
3452 /* Deal with C++: must preserve virtual function table size. */
3453 if (TREE_CODE (olddecl) == TYPE_DECL)
3455 register tree newtype = TREE_TYPE (newdecl);
3456 register tree oldtype = TREE_TYPE (olddecl);
3458 if (newtype != error_mark_node && oldtype != error_mark_node
3459 && TYPE_LANG_SPECIFIC (newtype) && TYPE_LANG_SPECIFIC (oldtype))
3461 CLASSTYPE_VSIZE (newtype) = CLASSTYPE_VSIZE (oldtype);
3462 CLASSTYPE_FRIEND_CLASSES (newtype)
3463 = CLASSTYPE_FRIEND_CLASSES (oldtype);
3466 DECL_ORIGINAL_TYPE (newdecl) = DECL_ORIGINAL_TYPE (olddecl);
3469 /* Copy all the DECL_... slots specified in the new decl
3470 except for any that we copy here from the old type. */
3471 DECL_MACHINE_ATTRIBUTES (newdecl)
3472 = merge_machine_decl_attributes (olddecl, newdecl);
3474 if (TREE_CODE (newdecl) == TEMPLATE_DECL)
3476 TREE_TYPE (olddecl) = TREE_TYPE (DECL_TEMPLATE_RESULT (olddecl));
3477 DECL_TEMPLATE_SPECIALIZATIONS (olddecl)
3478 = chainon (DECL_TEMPLATE_SPECIALIZATIONS (olddecl),
3479 DECL_TEMPLATE_SPECIALIZATIONS (newdecl));
3486 /* Automatically handles default parameters. */
3487 tree oldtype = TREE_TYPE (olddecl);
3490 /* Merge the data types specified in the two decls. */
3491 newtype = common_type (TREE_TYPE (newdecl), TREE_TYPE (olddecl));
3493 /* If common_type produces a non-typedef type, just use the old type. */
3494 if (TREE_CODE (newdecl) == TYPE_DECL
3495 && newtype == DECL_ORIGINAL_TYPE (newdecl))
3498 if (TREE_CODE (newdecl) == VAR_DECL)
3499 DECL_THIS_EXTERN (newdecl) |= DECL_THIS_EXTERN (olddecl);
3500 /* Do this after calling `common_type' so that default
3501 parameters don't confuse us. */
3502 else if (TREE_CODE (newdecl) == FUNCTION_DECL
3503 && (TYPE_RAISES_EXCEPTIONS (TREE_TYPE (newdecl))
3504 != TYPE_RAISES_EXCEPTIONS (TREE_TYPE (olddecl))))
3506 TREE_TYPE (newdecl) = build_exception_variant (newtype,
3507 TYPE_RAISES_EXCEPTIONS (TREE_TYPE (newdecl)));
3508 TREE_TYPE (olddecl) = build_exception_variant (newtype,
3509 TYPE_RAISES_EXCEPTIONS (oldtype));
3511 if ((pedantic || ! DECL_IN_SYSTEM_HEADER (olddecl))
3512 && DECL_SOURCE_LINE (olddecl) != 0
3514 && !comp_except_specs (TYPE_RAISES_EXCEPTIONS (TREE_TYPE (newdecl)),
3515 TYPE_RAISES_EXCEPTIONS (TREE_TYPE (olddecl)), 1))
3517 cp_error ("declaration of `%F' throws different exceptions",
3519 cp_error_at ("than previous declaration `%F'", olddecl);
3522 TREE_TYPE (newdecl) = TREE_TYPE (olddecl) = newtype;
3524 /* Lay the type out, unless already done. */
3525 if (! same_type_p (newtype, oldtype)
3526 && TREE_TYPE (newdecl) != error_mark_node
3527 && !(processing_template_decl && uses_template_parms (newdecl)))
3528 layout_type (TREE_TYPE (newdecl));
3530 if ((TREE_CODE (newdecl) == VAR_DECL
3531 || TREE_CODE (newdecl) == PARM_DECL
3532 || TREE_CODE (newdecl) == RESULT_DECL
3533 || TREE_CODE (newdecl) == FIELD_DECL
3534 || TREE_CODE (newdecl) == TYPE_DECL)
3535 && !(processing_template_decl && uses_template_parms (newdecl)))
3536 layout_decl (newdecl, 0);
3538 /* Merge the type qualifiers. */
3539 if (TREE_READONLY (newdecl))
3540 TREE_READONLY (olddecl) = 1;
3541 if (TREE_THIS_VOLATILE (newdecl))
3542 TREE_THIS_VOLATILE (olddecl) = 1;
3544 /* Merge the initialization information. */
3545 if (DECL_INITIAL (newdecl) == NULL_TREE
3546 && DECL_INITIAL (olddecl) != NULL_TREE)
3548 DECL_INITIAL (newdecl) = DECL_INITIAL (olddecl);
3549 DECL_SOURCE_FILE (newdecl) = DECL_SOURCE_FILE (olddecl);
3550 DECL_SOURCE_LINE (newdecl) = DECL_SOURCE_LINE (olddecl);
3551 if (CAN_HAVE_FULL_LANG_DECL_P (newdecl)
3552 && DECL_LANG_SPECIFIC (newdecl)
3553 && DECL_LANG_SPECIFIC (olddecl))
3554 DECL_SAVED_TREE (newdecl) = DECL_SAVED_TREE (olddecl);
3557 /* Merge the section attribute.
3558 We want to issue an error if the sections conflict but that must be
3559 done later in decl_attributes since we are called before attributes
3561 if (DECL_SECTION_NAME (newdecl) == NULL_TREE)
3562 DECL_SECTION_NAME (newdecl) = DECL_SECTION_NAME (olddecl);
3564 /* Keep the old rtl since we can safely use it. */
3565 DECL_RTL (newdecl) = DECL_RTL (olddecl);
3567 if (TREE_CODE (newdecl) == FUNCTION_DECL)
3569 DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (newdecl)
3570 |= DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (olddecl);
3571 DECL_NO_CHECK_MEMORY_USAGE (newdecl)
3572 |= DECL_NO_CHECK_MEMORY_USAGE (olddecl);
3573 DECL_NO_LIMIT_STACK (newdecl)
3574 |= DECL_NO_LIMIT_STACK (olddecl);
3577 /* If cannot merge, then use the new type and qualifiers,
3578 and don't preserve the old rtl. */
3581 /* Clean out any memory we had of the old declaration. */
3582 tree oldstatic = value_member (olddecl, static_aggregates);
3584 TREE_VALUE (oldstatic) = error_mark_node;
3586 TREE_TYPE (olddecl) = TREE_TYPE (newdecl);
3587 TREE_READONLY (olddecl) = TREE_READONLY (newdecl);
3588 TREE_THIS_VOLATILE (olddecl) = TREE_THIS_VOLATILE (newdecl);
3589 TREE_SIDE_EFFECTS (olddecl) = TREE_SIDE_EFFECTS (newdecl);
3592 /* Merge the storage class information. */
3593 DECL_WEAK (newdecl) |= DECL_WEAK (olddecl);
3594 DECL_ONE_ONLY (newdecl) |= DECL_ONE_ONLY (olddecl);
3595 DECL_DEFER_OUTPUT (newdecl) |= DECL_DEFER_OUTPUT (olddecl);
3596 TREE_PUBLIC (newdecl) = TREE_PUBLIC (olddecl);
3597 TREE_STATIC (olddecl) = TREE_STATIC (newdecl) |= TREE_STATIC (olddecl);
3598 if (! DECL_EXTERNAL (olddecl))
3599 DECL_EXTERNAL (newdecl) = 0;
3601 if (DECL_LANG_SPECIFIC (newdecl) && DECL_LANG_SPECIFIC (olddecl))
3603 DECL_INTERFACE_KNOWN (newdecl) |= DECL_INTERFACE_KNOWN (olddecl);
3604 DECL_NOT_REALLY_EXTERN (newdecl) |= DECL_NOT_REALLY_EXTERN (olddecl);
3605 DECL_COMDAT (newdecl) |= DECL_COMDAT (olddecl);
3606 DECL_TEMPLATE_INSTANTIATED (newdecl)
3607 |= DECL_TEMPLATE_INSTANTIATED (olddecl);
3608 /* Don't really know how much of the language-specific
3609 values we should copy from old to new. */
3610 DECL_IN_AGGR_P (newdecl) = DECL_IN_AGGR_P (olddecl);
3611 DECL_ACCESS (newdecl) = DECL_ACCESS (olddecl);
3612 DECL_NONCONVERTING_P (newdecl) = DECL_NONCONVERTING_P (olddecl);
3613 DECL_TEMPLATE_INFO (newdecl) = DECL_TEMPLATE_INFO (olddecl);
3614 olddecl_friend = DECL_FRIEND_P (olddecl);
3616 /* Only functions have DECL_BEFRIENDING_CLASSES. */
3617 if (TREE_CODE (newdecl) == FUNCTION_DECL
3618 || DECL_FUNCTION_TEMPLATE_P (newdecl))
3619 DECL_BEFRIENDING_CLASSES (newdecl)
3620 = chainon (DECL_BEFRIENDING_CLASSES (newdecl),
3621 DECL_BEFRIENDING_CLASSES (olddecl));
3624 if (TREE_CODE (newdecl) == FUNCTION_DECL)
3626 if (DECL_TEMPLATE_INSTANTIATION (olddecl)
3627 && !DECL_TEMPLATE_INSTANTIATION (newdecl))
3629 /* If newdecl is not a specialization, then it is not a
3630 template-related function at all. And that means that we
3631 shoud have exited above, returning 0. */
3632 my_friendly_assert (DECL_TEMPLATE_SPECIALIZATION (newdecl),
3635 if (TREE_USED (olddecl))
3636 /* From [temp.expl.spec]:
3638 If a template, a member template or the member of a class
3639 template is explicitly specialized then that
3640 specialization shall be declared before the first use of
3641 that specialization that would cause an implicit
3642 instantiation to take place, in every translation unit in
3643 which such a use occurs. */
3644 cp_error ("explicit specialization of %D after first use",
3647 SET_DECL_TEMPLATE_SPECIALIZATION (olddecl);
3649 DECL_THIS_INLINE (newdecl) |= DECL_THIS_INLINE (olddecl);
3651 /* If either decl says `inline', this fn is inline, unless its
3652 definition was passed already. */
3653 if (DECL_INLINE (newdecl) && DECL_INITIAL (olddecl) == NULL_TREE)
3654 DECL_INLINE (olddecl) = 1;
3655 DECL_INLINE (newdecl) = DECL_INLINE (olddecl);
3659 DECL_LANGUAGE (olddecl) = DECL_LANGUAGE (newdecl);
3660 DECL_ASSEMBLER_NAME (olddecl) = DECL_ASSEMBLER_NAME (newdecl);
3661 DECL_RTL (olddecl) = DECL_RTL (newdecl);
3663 if (! types_match || new_defines_function)
3665 /* These need to be copied so that the names are available.
3666 Note that if the types do match, we'll preserve inline
3667 info and other bits, but if not, we won't. */
3668 DECL_ARGUMENTS (olddecl) = DECL_ARGUMENTS (newdecl);
3669 DECL_RESULT (olddecl) = DECL_RESULT (newdecl);
3671 if (new_defines_function)
3672 /* If defining a function declared with other language
3673 linkage, use the previously declared language linkage. */
3674 DECL_LANGUAGE (newdecl) = DECL_LANGUAGE (olddecl);
3675 else if (types_match)
3677 /* If redeclaring a builtin function, and not a definition,
3678 it stays built in. */
3679 if (DECL_BUILT_IN (olddecl))
3681 DECL_BUILT_IN_CLASS (newdecl) = DECL_BUILT_IN_CLASS (olddecl);
3682 DECL_FUNCTION_CODE (newdecl) = DECL_FUNCTION_CODE (olddecl);
3683 /* If we're keeping the built-in definition, keep the rtl,
3684 regardless of declaration matches. */
3685 DECL_RTL (newdecl) = DECL_RTL (olddecl);
3688 DECL_FRAME_SIZE (newdecl) = DECL_FRAME_SIZE (olddecl);
3690 DECL_RESULT (newdecl) = DECL_RESULT (olddecl);
3691 if ((DECL_SAVED_INSNS (newdecl) = DECL_SAVED_INSNS (olddecl)))
3692 /* Previously saved insns go together with
3693 the function's previous definition. */
3694 DECL_INITIAL (newdecl) = DECL_INITIAL (olddecl);
3695 /* Don't clear out the arguments if we're redefining a function. */
3696 if (DECL_ARGUMENTS (olddecl))
3697 DECL_ARGUMENTS (newdecl) = DECL_ARGUMENTS (olddecl);
3701 if (TREE_CODE (newdecl) == NAMESPACE_DECL)
3703 NAMESPACE_LEVEL (newdecl) = NAMESPACE_LEVEL (olddecl);
3706 /* Now preserve various other info from the definition. */
3707 TREE_ADDRESSABLE (newdecl) = TREE_ADDRESSABLE (olddecl);
3708 TREE_ASM_WRITTEN (newdecl) = TREE_ASM_WRITTEN (olddecl);
3709 DECL_COMMON (newdecl) = DECL_COMMON (olddecl);
3710 DECL_ASSEMBLER_NAME (newdecl) = DECL_ASSEMBLER_NAME (olddecl);
3712 if (TREE_CODE (newdecl) == FUNCTION_DECL)
3716 function_size = sizeof (struct tree_decl);
3718 bcopy ((char *) newdecl + sizeof (struct tree_common),
3719 (char *) olddecl + sizeof (struct tree_common),
3720 function_size - sizeof (struct tree_common));
3722 if (DECL_TEMPLATE_INSTANTIATION (newdecl))
3724 /* If newdecl is a template instantiation, it is possible that
3725 the following sequence of events has occurred:
3727 o A friend function was declared in a class template. The
3728 class template was instantiated.
3730 o The instantiation of the friend declaration was
3731 recorded on the instantiation list, and is newdecl.
3733 o Later, however, instantiate_class_template called pushdecl
3734 on the newdecl to perform name injection. But, pushdecl in
3735 turn called duplicate_decls when it discovered that another
3736 declaration of a global function with the same name already
3739 o Here, in duplicate_decls, we decided to clobber newdecl.
3741 If we're going to do that, we'd better make sure that
3742 olddecl, and not newdecl, is on the list of
3743 instantiations so that if we try to do the instantiation
3744 again we won't get the clobbered declaration. */
3746 tree tmpl = DECL_TI_TEMPLATE (newdecl);
3747 tree decls = DECL_TEMPLATE_SPECIALIZATIONS (tmpl);
3749 for (; decls; decls = TREE_CHAIN (decls))
3750 if (TREE_VALUE (decls) == newdecl)
3751 TREE_VALUE (decls) = olddecl;
3756 bcopy ((char *) newdecl + sizeof (struct tree_common),
3757 (char *) olddecl + sizeof (struct tree_common),
3758 sizeof (struct tree_decl) - sizeof (struct tree_common)
3759 + tree_code_length [(int)TREE_CODE (newdecl)] * sizeof (char *));
3762 DECL_UID (olddecl) = olddecl_uid;
3764 DECL_FRIEND_P (olddecl) = 1;
3766 /* NEWDECL contains the merged attribute lists.
3767 Update OLDDECL to be the same. */
3768 DECL_MACHINE_ATTRIBUTES (olddecl) = DECL_MACHINE_ATTRIBUTES (newdecl);
3773 /* Record a decl-node X as belonging to the current lexical scope.
3774 Check for errors (such as an incompatible declaration for the same
3775 name already seen in the same scope).
3777 Returns either X or an old decl for the same name.
3778 If an old decl is returned, it may have been smashed
3779 to agree with what X says. */
3787 int need_new_binding;
3789 /* We shouldn't be calling pushdecl when we're generating RTL for a
3790 function that we already did semantic analysis on previously. */
3791 my_friendly_assert (!cfun || doing_semantic_analysis_p (),
3794 need_new_binding = 1;
3796 if (DECL_TEMPLATE_PARM_P (x))
3797 /* Template parameters have no context; they are not X::T even
3798 when declared within a class or namespace. */
3802 if (current_function_decl && x != current_function_decl
3803 /* A local declaration for a function doesn't constitute
3805 && !(TREE_CODE (x) == FUNCTION_DECL && !DECL_INITIAL (x))
3806 /* A local declaration for an `extern' variable is in the
3807 scope of the current namespace, not the current
3809 && !(TREE_CODE (x) == VAR_DECL && DECL_EXTERNAL (x))
3810 && !DECL_CONTEXT (x))
3811 DECL_CONTEXT (x) = current_function_decl;
3813 /* If this is the declaration for a namespace-scope function,
3814 but the declaration itself is in a local scope, mark the
3816 if (TREE_CODE (x) == FUNCTION_DECL
3817 && DECL_NAMESPACE_SCOPE_P (x)
3818 && current_function_decl
3819 && x != current_function_decl)
3820 DECL_LOCAL_FUNCTION_P (x) = 1;
3823 name = DECL_NAME (x);
3826 int different_binding_level = 0;
3828 if (TREE_CODE (name) == TEMPLATE_ID_EXPR)
3829 name = TREE_OPERAND (name, 0);
3831 /* In case this decl was explicitly namespace-qualified, look it
3832 up in its namespace context. */
3833 if (TREE_CODE (x) == VAR_DECL && DECL_NAMESPACE_SCOPE_P (x)
3834 && namespace_bindings_p ())
3835 t = namespace_binding (name, DECL_CONTEXT (x));
3837 t = lookup_name_current_level (name);
3839 /* [basic.link] If there is a visible declaration of an entity
3840 with linkage having the same name and type, ignoring entities
3841 declared outside the innermost enclosing namespace scope, the
3842 block scope declaration declares that same entity and
3843 receives the linkage of the previous declaration. */
3844 if (! t && current_function_decl && x != current_function_decl
3845 && (TREE_CODE (x) == FUNCTION_DECL || TREE_CODE (x) == VAR_DECL)
3846 && DECL_EXTERNAL (x))
3848 /* Look in block scope. */
3849 t = IDENTIFIER_VALUE (name);
3850 /* Or in the innermost namespace. */
3852 t = namespace_binding (name, DECL_CONTEXT (x));
3853 /* Does it have linkage? */
3854 if (t && ! (TREE_STATIC (t) || DECL_EXTERNAL (t)))
3857 different_binding_level = 1;
3860 /* If we are declaring a function, and the result of name-lookup
3861 was an OVERLOAD, look for an overloaded instance that is
3862 actually the same as the function we are declaring. (If
3863 there is one, we have to merge our declaration with the
3864 previous declaration.) */
3865 if (t && TREE_CODE (t) == OVERLOAD)
3869 if (TREE_CODE (x) == FUNCTION_DECL)
3870 for (match = t; match; match = OVL_NEXT (match))
3872 if (DECL_ASSEMBLER_NAME (OVL_CURRENT (t))
3873 == DECL_ASSEMBLER_NAME (x))
3877 /* Just choose one. */
3881 t = OVL_CURRENT (match);
3886 if (t == error_mark_node)
3888 /* error_mark_node is 0 for a while during initialization! */
3890 cp_error_at ("`%#D' used prior to declaration", x);
3892 else if (t != NULL_TREE)
3894 if (different_binding_level)
3896 if (decls_match (x, t))
3897 /* The standard only says that the local extern
3898 inherits linkage from the previous decl; in
3899 particular, default args are not shared. It would
3900 be nice to propagate inlining info, though. FIXME. */
3901 TREE_PUBLIC (x) = TREE_PUBLIC (t);
3903 else if (TREE_CODE (t) == PARM_DECL)
3905 if (DECL_CONTEXT (t) == NULL_TREE)
3906 fatal ("parse errors have confused me too much");
3908 /* Check for duplicate params. */
3909 if (duplicate_decls (x, t))
3912 else if ((DECL_EXTERN_C_FUNCTION_P (x)
3913 || DECL_FUNCTION_TEMPLATE_P (x))
3914 && is_overloaded_fn (t))
3915 /* Don't do anything just yet. */;
3916 else if (t == wchar_decl_node)
3918 if (pedantic && ! DECL_IN_SYSTEM_HEADER (x))
3919 cp_pedwarn ("redeclaration of wchar_t as `%T'", TREE_TYPE (x));
3921 /* Throw away the redeclaration. */
3924 else if (TREE_CODE (t) != TREE_CODE (x))
3926 if (duplicate_decls (x, t))
3929 else if (duplicate_decls (x, t))
3931 if (TREE_CODE (t) == TYPE_DECL)
3932 SET_IDENTIFIER_TYPE_VALUE (name, TREE_TYPE (t));
3933 else if (TREE_CODE (t) == FUNCTION_DECL)
3934 check_default_args (t);
3938 else if (DECL_MAIN_P (x))
3940 /* A redeclaration of main, but not a duplicate of the
3945 This function shall not be overloaded. */
3946 cp_error_at ("invalid redeclaration of `%D'", t);
3947 cp_error ("as `%D'", x);
3948 /* We don't try to push this declaration since that
3954 check_template_shadow (x);
3956 /* If this is a function conjured up by the backend, massage it
3957 so it looks friendly. */
3958 if (DECL_NON_THUNK_FUNCTION_P (x) && ! DECL_LANG_SPECIFIC (x))
3960 retrofit_lang_decl (x);
3961 DECL_LANGUAGE (x) = lang_c;
3964 if (DECL_NON_THUNK_FUNCTION_P (x) && ! DECL_FUNCTION_MEMBER_P (x))
3966 t = push_overloaded_decl (x, PUSH_LOCAL);
3969 if (!namespace_bindings_p ())
3970 /* We do not need to create a binding for this name;
3971 push_overloaded_decl will have already done so if
3973 need_new_binding = 0;
3975 else if (DECL_FUNCTION_TEMPLATE_P (x) && DECL_NAMESPACE_SCOPE_P (x))
3977 t = push_overloaded_decl (x, PUSH_GLOBAL);
3979 add_decl_to_level (x, NAMESPACE_LEVEL (CP_DECL_CONTEXT (t)));
3983 /* If declaring a type as a typedef, copy the type (unless we're
3984 at line 0), and install this TYPE_DECL as the new type's typedef
3985 name. See the extensive comment in ../c-decl.c (pushdecl). */
3986 if (TREE_CODE (x) == TYPE_DECL)
3988 tree type = TREE_TYPE (x);
3989 if (DECL_SOURCE_LINE (x) == 0)
3991 if (TYPE_NAME (type) == 0)
3992 TYPE_NAME (type) = x;
3994 else if (type != error_mark_node && TYPE_NAME (type) != x
3995 /* We don't want to copy the type when all we're
3996 doing is making a TYPE_DECL for the purposes of
3998 && (!TYPE_NAME (type)
3999 || TYPE_NAME (type) != DECL_ABSTRACT_ORIGIN (x)))
4001 DECL_ORIGINAL_TYPE (x) = type;
4002 type = build_type_copy (type);
4003 TYPE_STUB_DECL (type) = TYPE_STUB_DECL (DECL_ORIGINAL_TYPE (x));
4004 TYPE_NAME (type) = x;
4005 TREE_TYPE (x) = type;
4008 if (type != error_mark_node
4010 && TYPE_IDENTIFIER (type))
4011 set_identifier_type_value_with_scope (DECL_NAME (x), type,
4012 current_binding_level);
4016 /* Multiple external decls of the same identifier ought to match.
4018 We get warnings about inline functions where they are defined.
4019 We get warnings about other functions from push_overloaded_decl.
4021 Avoid duplicate warnings where they are used. */
4022 if (TREE_PUBLIC (x) && TREE_CODE (x) != FUNCTION_DECL)
4026 decl = IDENTIFIER_NAMESPACE_VALUE (name);
4027 if (decl && TREE_CODE (decl) == OVERLOAD)
4028 decl = OVL_FUNCTION (decl);
4030 if (decl && decl != error_mark_node
4031 && (DECL_EXTERNAL (decl) || TREE_PUBLIC (decl))
4032 /* If different sort of thing, we already gave an error. */
4033 && TREE_CODE (decl) == TREE_CODE (x)
4034 && !same_type_p (TREE_TYPE (x), TREE_TYPE (decl)))
4036 cp_pedwarn ("type mismatch with previous external decl", x);
4037 cp_pedwarn_at ("previous external decl of `%#D'", decl);
4041 /* This name is new in its binding level.
4042 Install the new declaration and return it. */
4043 if (namespace_bindings_p ())
4045 /* Install a global value. */
4047 /* If the first global decl has external linkage,
4048 warn if we later see static one. */
4049 if (IDENTIFIER_GLOBAL_VALUE (name) == NULL_TREE && TREE_PUBLIC (x))
4050 TREE_PUBLIC (name) = 1;
4052 /* Bind the mangled name for the entity. In the future, we
4053 should not need to do this; mangled names are an
4054 implementation detail of which the front-end should not
4055 need to be aware. */
4056 if (!(TREE_CODE (x) == TYPE_DECL && DECL_ARTIFICIAL (x)
4058 /* For an ordinary function, we create a binding from
4059 the mangled name (i.e., NAME) to the DECL. But, for
4060 an `extern "C"' function, the mangled name and the
4061 ordinary name are the same so we need not do this. */
4062 && !DECL_EXTERN_C_FUNCTION_P (x))
4066 if (TREE_CODE (x) == TYPE_DECL || TREE_CODE (x) == VAR_DECL
4067 || TREE_CODE (x) == NAMESPACE_DECL)
4068 mangled_name = name;
4070 mangled_name = DECL_ASSEMBLER_NAME (x);
4072 if (TREE_CODE (x) == FUNCTION_DECL)
4074 ((IDENTIFIER_GLOBAL_VALUE (mangled_name) == NULL_TREE)
4075 || (IDENTIFIER_GLOBAL_VALUE (mangled_name) == x), 378);
4076 SET_IDENTIFIER_NAMESPACE_VALUE (mangled_name, x);
4079 /* Don't forget if the function was used via an implicit decl. */
4080 if (IDENTIFIER_IMPLICIT_DECL (name)
4081 && TREE_USED (IDENTIFIER_IMPLICIT_DECL (name)))
4084 /* Don't forget if its address was taken in that way. */
4085 if (IDENTIFIER_IMPLICIT_DECL (name)
4086 && TREE_ADDRESSABLE (IDENTIFIER_IMPLICIT_DECL (name)))
4087 TREE_ADDRESSABLE (x) = 1;
4089 /* Warn about mismatches against previous implicit decl. */
4090 if (IDENTIFIER_IMPLICIT_DECL (name) != NULL_TREE
4091 /* If this real decl matches the implicit, don't complain. */
4092 && ! (TREE_CODE (x) == FUNCTION_DECL
4093 && TREE_TYPE (TREE_TYPE (x)) == integer_type_node))
4095 ("`%D' was previously implicitly declared to return `int'", x);
4097 /* If new decl is `static' and an `extern' was seen previously,
4099 if (x != NULL_TREE && t != NULL_TREE && decls_match (x, t))
4100 warn_extern_redeclared_static (x, t);
4104 /* Here to install a non-global value. */
4105 tree oldlocal = IDENTIFIER_VALUE (name);
4106 tree oldglobal = IDENTIFIER_NAMESPACE_VALUE (name);
4108 if (need_new_binding)
4110 push_local_binding (name, x, 0);
4111 /* Because push_local_binding will hook X on to the
4112 current_binding_level's name list, we don't want to
4113 do that again below. */
4114 need_new_binding = 0;
4117 /* If this is a TYPE_DECL, push it into the type value slot. */
4118 if (TREE_CODE (x) == TYPE_DECL)
4119 set_identifier_type_value_with_scope (name, TREE_TYPE (x),
4120 current_binding_level);
4122 /* Clear out any TYPE_DECL shadowed by a namespace so that
4123 we won't think this is a type. The C struct hack doesn't
4124 go through namespaces. */
4125 if (TREE_CODE (x) == NAMESPACE_DECL)
4126 set_identifier_type_value_with_scope (name, NULL_TREE,
4127 current_binding_level);
4134 && TREE_CODE (oldlocal) == VAR_DECL
4135 && DECL_DEAD_FOR_LOCAL (oldlocal))
4136 oldlocal = DECL_SHADOWED_FOR_VAR (oldlocal);
4138 if (oldlocal == NULL_TREE)
4139 oldlocal = IDENTIFIER_NAMESPACE_VALUE (DECL_NAME (d));
4142 /* If this is an extern function declaration, see if we
4143 have a global definition or declaration for the function. */
4144 if (oldlocal == NULL_TREE
4145 && DECL_EXTERNAL (x)
4146 && oldglobal != NULL_TREE
4147 && TREE_CODE (x) == FUNCTION_DECL
4148 && TREE_CODE (oldglobal) == FUNCTION_DECL)
4150 /* We have one. Their types must agree. */
4151 if (decls_match (x, oldglobal))
4155 cp_warning ("extern declaration of `%#D' doesn't match", x);
4156 cp_warning_at ("global declaration `%#D'", oldglobal);
4159 /* If we have a local external declaration,
4160 and no file-scope declaration has yet been seen,
4161 then if we later have a file-scope decl it must not be static. */
4162 if (oldlocal == NULL_TREE
4163 && oldglobal == NULL_TREE
4164 && DECL_EXTERNAL (x)
4166 TREE_PUBLIC (name) = 1;
4168 /* Warn if shadowing an argument at the top level of the body. */
4169 if (oldlocal != NULL_TREE && !DECL_EXTERNAL (x)
4170 /* Inline decls shadow nothing. */
4171 && !DECL_FROM_INLINE (x)
4172 && TREE_CODE (oldlocal) == PARM_DECL
4173 /* Don't complain if it's from an enclosing function. */
4174 && DECL_CONTEXT (oldlocal) == current_function_decl
4175 && TREE_CODE (x) != PARM_DECL)
4177 /* Go to where the parms should be and see if we
4179 struct binding_level *b = current_binding_level->level_chain;
4185 if (b->parm_flag == 1)
4186 cp_error ("declaration of `%#D' shadows a parameter", name);
4189 /* Maybe warn if shadowing something else. */
4190 if (warn_shadow && !DECL_EXTERNAL (x)
4191 /* Inline decls shadow nothing. */
4192 && !DECL_FROM_INLINE (x)
4193 /* No shadow warnings for internally generated vars. */
4194 && ! DECL_ARTIFICIAL (x)
4195 /* No shadow warnings for vars made for inlining. */
4196 && ! DECL_FROM_INLINE (x))
4198 if (oldlocal != NULL_TREE && TREE_CODE (oldlocal) == PARM_DECL)
4199 warning ("declaration of `%s' shadows a parameter",
4200 IDENTIFIER_POINTER (name));
4201 else if (IDENTIFIER_CLASS_VALUE (name) != NULL_TREE
4202 && current_class_ptr
4203 && !TREE_STATIC (name))
4204 warning ("declaration of `%s' shadows a member of `this'",
4205 IDENTIFIER_POINTER (name));
4206 else if (oldlocal != NULL_TREE)
4207 warning ("declaration of `%s' shadows previous local",
4208 IDENTIFIER_POINTER (name));
4209 else if (oldglobal != NULL_TREE)
4210 /* XXX shadow warnings in outer-more namespaces */
4211 warning ("declaration of `%s' shadows global declaration",
4212 IDENTIFIER_POINTER (name));
4216 if (TREE_CODE (x) == FUNCTION_DECL)
4217 check_default_args (x);
4219 /* Keep count of variables in this level with incomplete type. */
4220 if (TREE_CODE (x) == VAR_DECL
4221 && TREE_TYPE (x) != error_mark_node
4222 && ((!COMPLETE_TYPE_P (TREE_TYPE (x))
4223 && PROMOTES_TO_AGGR_TYPE (TREE_TYPE (x), ARRAY_TYPE))
4224 /* RTTI TD entries are created while defining the type_info. */
4225 || (TYPE_LANG_SPECIFIC (TREE_TYPE (x))
4226 && TYPE_BEING_DEFINED (TREE_TYPE (x)))))
4228 if (namespace_bindings_p ())
4229 namespace_scope_incomplete
4230 = tree_cons (NULL_TREE, x, namespace_scope_incomplete);
4232 current_binding_level->incomplete
4233 = tree_cons (NULL_TREE, x, current_binding_level->incomplete);
4237 if (need_new_binding)
4238 add_decl_to_level (x,
4239 DECL_NAMESPACE_SCOPE_P (x)
4240 ? NAMESPACE_LEVEL (CP_DECL_CONTEXT (x))
4241 : current_binding_level);
4246 /* Same as pushdecl, but define X in binding-level LEVEL. We rely on the
4247 caller to set DECL_CONTEXT properly. */
4250 pushdecl_with_scope (x, level)
4252 struct binding_level *level;
4254 register struct binding_level *b;
4255 tree function_decl = current_function_decl;
4257 current_function_decl = NULL_TREE;
4258 if (level->parm_flag == 2)
4260 b = class_binding_level;
4261 class_binding_level = level;
4262 pushdecl_class_level (x);
4263 class_binding_level = b;
4267 b = current_binding_level;
4268 current_binding_level = level;
4270 current_binding_level = b;
4272 current_function_decl = function_decl;
4276 /* Like pushdecl, only it places X in the current namespace,
4280 pushdecl_namespace_level (x)
4283 register struct binding_level *b = current_binding_level;
4286 t = pushdecl_with_scope (x, NAMESPACE_LEVEL (current_namespace));
4288 /* Now, the type_shadowed stack may screw us. Munge it so it does
4290 if (TREE_CODE (x) == TYPE_DECL)
4292 tree name = DECL_NAME (x);
4294 tree *ptr = (tree *)0;
4295 for (; b != global_binding_level; b = b->level_chain)
4297 tree shadowed = b->type_shadowed;
4298 for (; shadowed; shadowed = TREE_CHAIN (shadowed))
4299 if (TREE_PURPOSE (shadowed) == name)
4301 ptr = &TREE_VALUE (shadowed);
4302 /* Can't break out of the loop here because sometimes
4303 a binding level will have duplicate bindings for
4304 PT names. It's gross, but I haven't time to fix it. */
4307 newval = TREE_TYPE (x);
4308 if (ptr == (tree *)0)
4310 /* @@ This shouldn't be needed. My test case "zstring.cc" trips
4311 up here if this is changed to an assertion. --KR */
4312 SET_IDENTIFIER_TYPE_VALUE (name, newval);
4322 /* Like pushdecl, only it places X in GLOBAL_BINDING_LEVEL,
4326 pushdecl_top_level (x)
4329 push_to_top_level ();
4330 x = pushdecl_namespace_level (x);
4331 pop_from_top_level ();
4335 /* Make the declaration of X appear in CLASS scope. */
4338 pushdecl_class_level (x)
4341 /* Don't use DECL_ASSEMBLER_NAME here! Everything that looks in class
4342 scope looks for the pre-mangled name. */
4345 if (TREE_CODE (x) == OVERLOAD)
4346 x = OVL_CURRENT (x);
4347 name = DECL_NAME (x);
4351 push_class_level_binding (name, x);
4352 if (TREE_CODE (x) == TYPE_DECL)
4353 set_identifier_type_value (name, TREE_TYPE (x));
4355 else if (ANON_AGGR_TYPE_P (TREE_TYPE (x)))
4359 for (f = TYPE_FIELDS (TREE_TYPE (x));
4362 pushdecl_class_level (f);
4366 /* Enter DECL into the symbol table, if that's appropriate. Returns
4367 DECL, or a modified version thereof. */
4370 maybe_push_decl (decl)
4373 tree type = TREE_TYPE (decl);
4375 /* Add this decl to the current binding level, but not if it comes
4376 from another scope, e.g. a static member variable. TEM may equal
4377 DECL or it may be a previous decl of the same name. */
4378 if (decl == error_mark_node
4379 || (TREE_CODE (decl) != PARM_DECL
4380 && DECL_CONTEXT (decl) != NULL_TREE
4381 /* Definitions of namespace members outside their namespace are
4383 && TREE_CODE (DECL_CONTEXT (decl)) != NAMESPACE_DECL)
4384 || (TREE_CODE (decl) == TEMPLATE_DECL && !namespace_bindings_p ())
4385 || TREE_CODE (type) == UNKNOWN_TYPE
4386 /* The declaration of a template specialization does not affect
4387 the functions available for overload resolution, so we do not
4389 || (TREE_CODE (decl) == FUNCTION_DECL
4390 && DECL_TEMPLATE_SPECIALIZATION (decl)))
4393 return pushdecl (decl);
4396 /* Make the declaration(s) of X appear in CLASS scope
4397 under the name NAME. */
4400 push_class_level_binding (name, x)
4405 /* The class_binding_level will be NULL if x is a template
4406 parameter name in a member template. */
4407 if (!class_binding_level)
4410 /* Make sure that this new member does not have the same name
4411 as a template parameter. */
4412 if (TYPE_BEING_DEFINED (current_class_type))
4413 check_template_shadow (x);
4415 /* If this declaration shadows a declaration from an enclosing
4416 class, then we will need to restore IDENTIFIER_CLASS_VALUE when
4417 we leave this class. Record the shadowed declaration here. */
4418 binding = IDENTIFIER_BINDING (name);
4420 && ((TREE_CODE (x) == OVERLOAD
4421 && BINDING_VALUE (binding)
4422 && is_overloaded_fn (BINDING_VALUE (binding)))
4423 || INHERITED_VALUE_BINDING_P (binding)))
4428 /* If the old binding was from a base class, and was for a tag
4429 name, slide it over to make room for the new binding. The
4430 old binding is still visible if explicitly qualified with a
4432 if (INHERITED_VALUE_BINDING_P (binding)
4433 && BINDING_VALUE (binding)
4434 && TREE_CODE (BINDING_VALUE (binding)) == TYPE_DECL
4435 && DECL_ARTIFICIAL (BINDING_VALUE (binding))
4436 && !(TREE_CODE (x) == TYPE_DECL && DECL_ARTIFICIAL (x)))
4438 old_decl = BINDING_TYPE (binding);
4439 BINDING_TYPE (binding) = BINDING_VALUE (binding);
4440 BINDING_VALUE (binding) = NULL_TREE;
4441 INHERITED_VALUE_BINDING_P (binding) = 0;
4444 old_decl = BINDING_VALUE (binding);
4446 /* There was already a binding for X containing fewer
4447 functions than are named in X. Find the previous
4448 declaration of X on the class-shadowed list, and update it. */
4449 for (shadow = class_binding_level->class_shadowed;
4451 shadow = TREE_CHAIN (shadow))
4452 if (TREE_PURPOSE (shadow) == name
4453 && TREE_TYPE (shadow) == old_decl)
4455 BINDING_VALUE (binding) = x;
4456 INHERITED_VALUE_BINDING_P (binding) = 0;
4457 TREE_TYPE (shadow) = x;
4462 /* If we didn't replace an existing binding, put the binding on the
4463 stack of bindings for the identifier, and update
4464 IDENTIFIER_CLASS_VALUE. */
4465 if (push_class_binding (name, x))
4467 class_binding_level->class_shadowed
4468 = tree_cons (name, IDENTIFIER_CLASS_VALUE (name),
4469 class_binding_level->class_shadowed);
4470 /* Record the value we are binding NAME to so that we can know
4471 what to pop later. */
4472 TREE_TYPE (class_binding_level->class_shadowed) = x;
4476 /* Insert another USING_DECL into the current binding level, returning
4477 this declaration. If this is a redeclaration, do nothing, and
4478 return NULL_TREE if this not in namespace scope (in namespace
4479 scope, a using decl might extend any previous bindings). */
4482 push_using_decl (scope, name)
4488 my_friendly_assert (TREE_CODE (scope) == NAMESPACE_DECL, 383);
4489 my_friendly_assert (TREE_CODE (name) == IDENTIFIER_NODE, 384);
4490 for (decl = current_binding_level->usings; decl; decl = TREE_CHAIN (decl))
4491 if (DECL_INITIAL (decl) == scope && DECL_NAME (decl) == name)
4494 return namespace_bindings_p () ? decl : NULL_TREE;
4495 decl = build_lang_decl (USING_DECL, name, void_type_node);
4496 DECL_INITIAL (decl) = scope;
4497 TREE_CHAIN (decl) = current_binding_level->usings;
4498 current_binding_level->usings = decl;
4502 /* Add namespace to using_directives. Return NULL_TREE if nothing was
4503 changed (i.e. there was already a directive), or the fresh
4504 TREE_LIST otherwise. */
4507 push_using_directive (used)
4510 tree ud = current_binding_level->using_directives;
4511 tree iter, ancestor;
4513 /* Check if we already have this. */
4514 if (purpose_member (used, ud) != NULL_TREE)
4517 /* Recursively add all namespaces used. */
4518 for (iter = DECL_NAMESPACE_USING (used); iter; iter = TREE_CHAIN (iter))
4519 push_using_directive (TREE_PURPOSE (iter));
4521 ancestor = namespace_ancestor (current_decl_namespace (), used);
4522 ud = current_binding_level->using_directives;
4523 ud = tree_cons (used, ancestor, ud);
4524 current_binding_level->using_directives = ud;
4528 /* DECL is a FUNCTION_DECL for a non-member function, which may have
4529 other definitions already in place. We get around this by making
4530 the value of the identifier point to a list of all the things that
4531 want to be referenced by that name. It is then up to the users of
4532 that name to decide what to do with that list.
4534 DECL may also be a TEMPLATE_DECL, with a FUNCTION_DECL in its
4535 DECL_TEMPLATE_RESULT. It is dealt with the same way.
4537 FLAGS is a bitwise-or of the following values:
4538 PUSH_LOCAL: Bind DECL in the current scope, rather than at
4540 PUSH_USING: DECL is being pushed as the result of a using
4543 The value returned may be a previous declaration if we guessed wrong
4544 about what language DECL should belong to (C or C++). Otherwise,
4545 it's always DECL (and never something that's not a _DECL). */
4548 push_overloaded_decl (decl, flags)
4552 tree name = DECL_NAME (decl);
4555 int doing_global = (namespace_bindings_p () || !(flags & PUSH_LOCAL));
4558 old = namespace_binding (name, DECL_CONTEXT (decl));
4560 old = lookup_name_current_level (name);
4564 if (TREE_CODE (old) == TYPE_DECL && DECL_ARTIFICIAL (old))
4566 tree t = TREE_TYPE (old);
4567 if (IS_AGGR_TYPE (t) && warn_shadow
4568 && (! DECL_IN_SYSTEM_HEADER (decl)
4569 || ! DECL_IN_SYSTEM_HEADER (old)))
4570 cp_warning ("`%#D' hides constructor for `%#T'", decl, t);
4573 else if (is_overloaded_fn (old))
4577 for (tmp = old; tmp; tmp = OVL_NEXT (tmp))
4579 tree fn = OVL_CURRENT (tmp);
4581 if (TREE_CODE (tmp) == OVERLOAD && OVL_USED (tmp)
4582 && !(flags & PUSH_USING)
4583 && compparms (TYPE_ARG_TYPES (TREE_TYPE (fn)),
4584 TYPE_ARG_TYPES (TREE_TYPE (decl))))
4585 cp_error ("`%#D' conflicts with previous using declaration `%#D'",
4588 if (duplicate_decls (decl, fn))
4592 else if (old == error_mark_node)
4593 /* Ignore the undefined symbol marker. */
4597 cp_error_at ("previous non-function declaration `%#D'", old);
4598 cp_error ("conflicts with function declaration `%#D'", decl);
4603 if (old || TREE_CODE (decl) == TEMPLATE_DECL)
4605 if (old && TREE_CODE (old) != OVERLOAD)
4606 new_binding = ovl_cons (decl, ovl_cons (old, NULL_TREE));
4608 new_binding = ovl_cons (decl, old);
4609 if (flags & PUSH_USING)
4610 OVL_USED (new_binding) = 1;
4613 /* NAME is not ambiguous. */
4617 set_namespace_binding (name, current_namespace, new_binding);
4620 /* We only create an OVERLOAD if there was a previous binding at
4621 this level, or if decl is a template. In the former case, we
4622 need to remove the old binding and replace it with the new
4623 binding. We must also run through the NAMES on the binding
4624 level where the name was bound to update the chain. */
4626 if (TREE_CODE (new_binding) == OVERLOAD && old)
4630 for (d = &BINDING_LEVEL (IDENTIFIER_BINDING (name))->names;
4632 d = &TREE_CHAIN (*d))
4634 || (TREE_CODE (*d) == TREE_LIST
4635 && TREE_VALUE (*d) == old))
4637 if (TREE_CODE (*d) == TREE_LIST)
4638 /* Just replace the old binding with the new. */
4639 TREE_VALUE (*d) = new_binding;
4641 /* Build a TREE_LIST to wrap the OVERLOAD. */
4642 *d = tree_cons (NULL_TREE, new_binding,
4645 /* And update the CPLUS_BINDING node. */
4646 BINDING_VALUE (IDENTIFIER_BINDING (name))
4651 /* We should always find a previous binding in this case. */
4652 my_friendly_abort (0);
4655 /* Install the new binding. */
4656 push_local_binding (name, new_binding, flags);
4662 /* Generate an implicit declaration for identifier FUNCTIONID
4663 as a function of type int (). Print a warning if appropriate. */
4666 implicitly_declare (functionid)
4671 /* We used to reuse an old implicit decl here,
4672 but this loses with inline functions because it can clobber
4673 the saved decl chains. */
4674 decl = build_lang_decl (FUNCTION_DECL, functionid, default_function_type);
4676 DECL_EXTERNAL (decl) = 1;
4677 TREE_PUBLIC (decl) = 1;
4679 /* ISO standard says implicit declarations are in the innermost block.
4680 So we record the decl in the standard fashion. */
4682 rest_of_decl_compilation (decl, NULL_PTR, 0, 0);
4685 /* Only one warning per identifier. */
4686 && IDENTIFIER_IMPLICIT_DECL (functionid) == NULL_TREE)
4688 cp_pedwarn ("implicit declaration of function `%#D'", decl);
4691 SET_IDENTIFIER_IMPLICIT_DECL (functionid, decl);
4696 /* Return zero if the declaration NEWDECL is valid
4697 when the declaration OLDDECL (assumed to be for the same name)
4698 has already been seen.
4699 Otherwise return an error message format string with a %s
4700 where the identifier should go. */
4703 redeclaration_error_message (newdecl, olddecl)
4704 tree newdecl, olddecl;
4706 if (TREE_CODE (newdecl) == TYPE_DECL)
4708 /* Because C++ can put things into name space for free,
4709 constructs like "typedef struct foo { ... } foo"
4710 would look like an erroneous redeclaration. */
4711 if (same_type_p (TREE_TYPE (newdecl), TREE_TYPE (olddecl)))
4714 return "redefinition of `%#D'";
4716 else if (TREE_CODE (newdecl) == FUNCTION_DECL)
4718 /* If this is a pure function, its olddecl will actually be
4719 the original initialization to `0' (which we force to call
4720 abort()). Don't complain about redefinition in this case. */
4721 if (DECL_LANG_SPECIFIC (olddecl) && DECL_PURE_VIRTUAL_P (olddecl))
4724 /* If both functions come from different namespaces, this is not
4725 a redeclaration - this is a conflict with a used function. */
4726 if (DECL_NAMESPACE_SCOPE_P (olddecl)
4727 && DECL_CONTEXT (olddecl) != DECL_CONTEXT (newdecl))
4728 return "`%D' conflicts with used function";
4730 /* We'll complain about linkage mismatches in
4731 warn_extern_redeclared_static. */
4733 /* Defining the same name twice is no good. */
4734 if (DECL_INITIAL (olddecl) != NULL_TREE
4735 && DECL_INITIAL (newdecl) != NULL_TREE)
4737 if (DECL_NAME (olddecl) == NULL_TREE)
4738 return "`%#D' not declared in class";
4740 return "redefinition of `%#D'";
4744 else if (TREE_CODE (newdecl) == TEMPLATE_DECL)
4746 if ((TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == FUNCTION_DECL
4747 && (DECL_TEMPLATE_RESULT (newdecl)
4748 != DECL_TEMPLATE_RESULT (olddecl))
4749 && DECL_INITIAL (DECL_TEMPLATE_RESULT (newdecl))
4750 && DECL_INITIAL (DECL_TEMPLATE_RESULT (olddecl)))
4751 || (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == TYPE_DECL
4752 && COMPLETE_TYPE_P (TREE_TYPE (newdecl))
4753 && COMPLETE_TYPE_P (TREE_TYPE (olddecl))))
4754 return "redefinition of `%#D'";
4757 else if (toplevel_bindings_p () || DECL_NAMESPACE_SCOPE_P (newdecl))
4759 /* Objects declared at top level: */
4760 /* If at least one is a reference, it's ok. */
4761 if (DECL_EXTERNAL (newdecl) || DECL_EXTERNAL (olddecl))
4763 /* Reject two definitions. */
4764 return "redefinition of `%#D'";
4768 /* Objects declared with block scope: */
4769 /* Reject two definitions, and reject a definition
4770 together with an external reference. */
4771 if (!(DECL_EXTERNAL (newdecl) && DECL_EXTERNAL (olddecl)))
4772 return "redeclaration of `%#D'";
4777 /* Create a new label, named ID. */
4780 make_label_decl (id, local_p)
4786 decl = build_decl (LABEL_DECL, id, void_type_node);
4788 /* Make sure every label has an rtx. */
4791 DECL_CONTEXT (decl) = current_function_decl;
4792 DECL_MODE (decl) = VOIDmode;
4793 C_DECLARED_LABEL_FLAG (decl) = local_p;
4795 /* Say where one reference is to the label, for the sake of the
4796 error if it is not defined. */
4797 DECL_SOURCE_LINE (decl) = lineno;
4798 DECL_SOURCE_FILE (decl) = input_filename;
4800 /* Record the fact that this identifier is bound to this label. */
4801 SET_IDENTIFIER_LABEL_VALUE (id, decl);
4806 /* Record this label on the list of used labels so that we can check
4807 at the end of the function to see whether or not the label was
4808 actually defined, and so we can check when the label is defined whether
4809 this use is valid. */
4815 if (named_label_uses == NULL
4816 || named_label_uses->names_in_scope != current_binding_level->names
4817 || named_label_uses->label_decl != decl)
4819 struct named_label_use_list *new_ent;
4820 new_ent = ((struct named_label_use_list *)
4821 ggc_alloc (sizeof (struct named_label_use_list)));
4822 new_ent->label_decl = decl;
4823 new_ent->names_in_scope = current_binding_level->names;
4824 new_ent->binding_level = current_binding_level;
4825 new_ent->lineno_o_goto = lineno;
4826 new_ent->filename_o_goto = input_filename;
4827 new_ent->next = named_label_uses;
4828 named_label_uses = new_ent;
4832 /* Look for a label named ID in the current function. If one cannot
4833 be found, create one. (We keep track of used, but undefined,
4834 labels, and complain about them at the end of a function.) */
4841 struct named_label_list *ent;
4843 /* You can't use labels at global scope. */
4844 if (current_function_decl == NULL_TREE)
4846 error ("label `%s' referenced outside of any function",
4847 IDENTIFIER_POINTER (id));
4851 /* See if we've already got this label. */
4852 decl = IDENTIFIER_LABEL_VALUE (id);
4853 if (decl != NULL_TREE && DECL_CONTEXT (decl) == current_function_decl)
4856 /* Record this label on the list of labels used in this function.
4857 We do this before calling make_label_decl so that we get the
4858 IDENTIFIER_LABEL_VALUE before the new label is declared. */
4859 ent = ((struct named_label_list *)
4860 ggc_alloc_cleared (sizeof (struct named_label_list)));
4861 ent->old_value = IDENTIFIER_LABEL_VALUE (id);
4862 ent->next = named_labels;
4865 /* We need a new label. */
4866 decl = make_label_decl (id, /*local_p=*/0);
4868 /* Now fill in the information we didn't have before. */
4869 ent->label_decl = decl;
4874 /* Declare a local label named ID. */
4877 declare_local_label (id)
4882 /* Add a new entry to the SHADOWED_LABELS list so that when we leave
4883 this scope we can restore the old value of
4884 IDENTIFIER_TYPE_VALUE. */
4885 current_binding_level->shadowed_labels
4886 = tree_cons (IDENTIFIER_LABEL_VALUE (id), NULL_TREE,
4887 current_binding_level->shadowed_labels);
4888 /* Look for the label. */
4889 decl = make_label_decl (id, /*local_p=*/1);
4890 /* Now fill in the information we didn't have before. */
4891 TREE_VALUE (current_binding_level->shadowed_labels) = decl;
4896 /* Returns nonzero if it is ill-formed to jump past the declaration of
4897 DECL. Returns 2 if it's also a real problem. */
4900 decl_jump_unsafe (decl)
4903 if (TREE_CODE (decl) != VAR_DECL || TREE_STATIC (decl))
4906 if (DECL_INITIAL (decl) == NULL_TREE
4907 && pod_type_p (TREE_TYPE (decl)))
4910 /* This is really only important if we're crossing an initialization.
4911 The POD stuff is just pedantry; why should it matter if the class
4912 contains a field of pointer to member type? */
4913 if (DECL_INITIAL (decl)
4914 || (TYPE_NEEDS_CONSTRUCTING (TREE_TYPE (decl))))
4919 /* Check that a single previously seen jump to a newly defined label
4920 is OK. DECL is the LABEL_DECL or 0; LEVEL is the binding_level for
4921 the jump context; NAMES are the names in scope in LEVEL at the jump
4922 context; FILE and LINE are the source position of the jump or 0. */
4925 check_previous_goto_1 (decl, level, names, file, line)
4927 struct binding_level *level;
4934 struct binding_level *b = current_binding_level;
4935 for (; b; b = b->level_chain)
4937 tree new_decls = b->names;
4938 tree old_decls = (b == level ? names : NULL_TREE);
4939 for (; new_decls != old_decls;
4940 new_decls = TREE_CHAIN (new_decls))
4942 int problem = decl_jump_unsafe (new_decls);
4949 cp_pedwarn ("jump to label `%D'", decl);
4951 pedwarn ("jump to case label");
4954 pedwarn_with_file_and_line (file, line, " from here");
4958 if (problem > 1 && DECL_ARTIFICIAL (new_decls))
4959 /* Can't skip init of __exception_info. */
4960 cp_error_at (" enters catch block", new_decls);
4961 else if (problem > 1)
4962 cp_error_at (" crosses initialization of `%#D'",
4965 cp_pedwarn_at (" enters scope of non-POD `%#D'",
4971 if (b->eh_region && ! saw_eh)
4976 cp_pedwarn ("jump to label `%D'", decl);
4978 pedwarn ("jump to case label");
4981 pedwarn_with_file_and_line (file, line, " from here");
4984 error (" enters try block");
4991 check_previous_goto (use)
4992 struct named_label_use_list *use;
4994 check_previous_goto_1 (use->label_decl, use->binding_level,
4995 use->names_in_scope, use->filename_o_goto,
4996 use->lineno_o_goto);
5000 check_switch_goto (level)
5001 struct binding_level *level;
5003 check_previous_goto_1 (NULL_TREE, level, level->names, NULL, 0);
5006 /* Check that any previously seen jumps to a newly defined label DECL
5007 are OK. Called by define_label. */
5010 check_previous_gotos (decl)
5013 struct named_label_use_list **usep;
5015 if (! TREE_USED (decl))
5018 for (usep = &named_label_uses; *usep; )
5020 struct named_label_use_list *use = *usep;
5021 if (use->label_decl == decl)
5023 check_previous_goto (use);
5027 usep = &(use->next);
5031 /* Check that a new jump to a label DECL is OK. Called by
5032 finish_goto_stmt. */
5040 struct named_label_list *lab;
5042 /* We can't know where a computed goto is jumping. So we assume
5044 if (! DECL_P (decl))
5047 /* If the label hasn't been defined yet, defer checking. */
5048 if (! DECL_INITIAL (decl))
5054 for (lab = named_labels; lab; lab = lab->next)
5055 if (decl == lab->label_decl)
5058 /* If the label is not on named_labels it's a gcc local label, so
5059 it must be in an outer scope, so jumping to it is always OK. */
5063 if ((lab->eh_region || lab->bad_decls) && !identified)
5065 cp_pedwarn_at ("jump to label `%D'", decl);
5066 pedwarn (" from here");
5070 for (bad = lab->bad_decls; bad; bad = TREE_CHAIN (bad))
5072 tree b = TREE_VALUE (bad);
5073 int u = decl_jump_unsafe (b);
5075 if (u > 1 && DECL_ARTIFICIAL (b))
5076 /* Can't skip init of __exception_info. */
5077 cp_error_at (" enters catch block", b);
5079 cp_error_at (" skips initialization of `%#D'", b);
5081 cp_pedwarn_at (" enters scope of non-POD `%#D'", b);
5085 error (" enters try block");
5088 /* Define a label, specifying the location in the source file.
5089 Return the LABEL_DECL node for the label, if the definition is valid.
5090 Otherwise return 0. */
5093 define_label (filename, line, name)
5094 const char *filename;
5098 tree decl = lookup_label (name);
5099 struct named_label_list *ent;
5101 for (ent = named_labels; ent; ent = ent->next)
5102 if (ent->label_decl == decl)
5105 /* After labels, make any new cleanups go into their
5106 own new (temporary) binding contour. */
5107 current_binding_level->more_cleanups_ok = 0;
5109 if (name == get_identifier ("wchar_t"))
5110 cp_pedwarn ("label named wchar_t");
5112 if (DECL_INITIAL (decl) != NULL_TREE)
5114 cp_error ("duplicate label `%D'", decl);
5119 /* Mark label as having been defined. */
5120 DECL_INITIAL (decl) = error_mark_node;
5121 /* Say where in the source. */
5122 DECL_SOURCE_FILE (decl) = filename;
5123 DECL_SOURCE_LINE (decl) = line;
5126 ent->names_in_scope = current_binding_level->names;
5127 ent->binding_level = current_binding_level;
5129 check_previous_gotos (decl);
5130 current_function_return_value = NULL_TREE;
5137 struct binding_level *level;
5138 struct cp_switch *next;
5139 /* The SWITCH_STMT being built. */
5141 /* A splay-tree mapping the low element of a case range to the high
5142 element, or NULL_TREE if there is no high element. Used to
5143 determine whether or not a new case label duplicates an old case
5144 label. We need a tree, rather than simply a hash table, because
5145 of the GNU case range extension. */
5149 /* A stack of the currently active switch statements. The innermost
5150 switch statement is on the top of the stack. There is no need to
5151 mark the stack for garbage collection because it is only active
5152 during the processing of the body of a function, and we never
5153 collect at that point. */
5155 static struct cp_switch *switch_stack;
5157 /* Called right after a switch-statement condition is parsed.
5158 SWITCH_STMT is the switch statement being parsed. */
5161 push_switch (switch_stmt)
5165 = (struct cp_switch *) xmalloc (sizeof (struct cp_switch));
5166 p->level = current_binding_level;
5167 p->next = switch_stack;
5168 p->switch_stmt = switch_stmt;
5169 p->cases = splay_tree_new (case_compare, NULL, NULL);
5176 struct cp_switch *cs;
5179 splay_tree_delete (cs->cases);
5180 switch_stack = switch_stack->next;
5184 /* Note that we've seen a definition of a case label, and complain if this
5185 is a bad place for one. */
5188 finish_case_label (low_value, high_value)
5197 error ("case label not within a switch statement");
5199 cp_error ("case label `%E' not within a switch statement",
5202 error ("`default' label not within a switch statement");
5206 if (processing_template_decl)
5210 /* For templates, just add the case label; we'll do semantic
5211 analysis at instantiation-time. */
5212 label = build_decl (LABEL_DECL, NULL_TREE, NULL_TREE);
5213 add_stmt (build_case_label (low_value, high_value, label));
5217 /* Find the condition on which this switch statement depends. */
5218 cond = SWITCH_COND (switch_stack->switch_stmt);
5219 if (cond && TREE_CODE (cond) == TREE_LIST)
5220 cond = TREE_VALUE (cond);
5222 c_add_case_label (switch_stack->cases, cond, low_value, high_value);
5224 check_switch_goto (switch_stack->level);
5226 /* After labels, make any new cleanups go into their
5227 own new (temporary) binding contour. */
5228 current_binding_level->more_cleanups_ok = 0;
5229 current_function_return_value = NULL_TREE;
5232 /* Return the list of declarations of the current level.
5233 Note that this list is in reverse order unless/until
5234 you nreverse it; and when you do nreverse it, you must
5235 store the result back using `storedecls' or you will lose. */
5240 return current_binding_level->names;
5243 /* Return the list of type-tags (for structs, etc) of the current level. */
5248 return current_binding_level->tags;
5251 /* Store the list of declarations of the current level.
5252 This is done for the parameter declarations of a function being defined,
5253 after they are modified in the light of any missing parameters. */
5259 current_binding_level->names = decls;
5262 /* Similarly, store the list of tags of the current level. */
5268 current_binding_level->tags = tags;
5271 /* Given NAME, an IDENTIFIER_NODE,
5272 return the structure (or union or enum) definition for that name.
5273 Searches binding levels from BINDING_LEVEL up to the global level.
5274 If THISLEVEL_ONLY is nonzero, searches only the specified context
5275 (but skips any tag-transparent contexts to find one that is
5276 meaningful for tags).
5277 FORM says which kind of type the caller wants;
5278 it is RECORD_TYPE or UNION_TYPE or ENUMERAL_TYPE.
5279 If the wrong kind of type is found, and it's not a template, an error is
5283 lookup_tag (form, name, binding_level, thislevel_only)
5284 enum tree_code form;
5286 struct binding_level *binding_level;
5289 register struct binding_level *level;
5290 /* Non-zero if, we should look past a template parameter level, even
5291 if THISLEVEL_ONLY. */
5292 int allow_template_parms_p = 1;
5294 for (level = binding_level; level; level = level->level_chain)
5297 if (ANON_AGGRNAME_P (name))
5298 for (tail = level->tags; tail; tail = TREE_CHAIN (tail))
5300 /* There's no need for error checking here, because
5301 anon names are unique throughout the compilation. */
5302 if (TYPE_IDENTIFIER (TREE_VALUE (tail)) == name)
5303 return TREE_VALUE (tail);
5305 else if (level->namespace_p)
5306 /* Do namespace lookup. */
5307 for (tail = current_namespace; 1; tail = CP_DECL_CONTEXT (tail))
5309 tree old = binding_for_name (name, tail);
5311 /* If we just skipped past a template parameter level,
5312 even though THISLEVEL_ONLY, and we find a template
5313 class declaration, then we use the _TYPE node for the
5314 template. See the example below. */
5315 if (thislevel_only && !allow_template_parms_p
5316 && old && BINDING_VALUE (old)
5317 && DECL_CLASS_TEMPLATE_P (BINDING_VALUE (old)))
5318 old = TREE_TYPE (BINDING_VALUE (old));
5320 old = BINDING_TYPE (old);
5322 /* If it has an original type, it is a typedef, and we
5323 should not return it. */
5324 if (old && DECL_ORIGINAL_TYPE (TYPE_NAME (old)))
5326 if (old && TREE_CODE (old) != form
5327 && !(form != ENUMERAL_TYPE && TREE_CODE (old) == TEMPLATE_DECL))
5329 cp_error ("`%#D' redeclared as %C", old, form);
5334 if (thislevel_only || tail == global_namespace)
5338 for (tail = level->tags; tail; tail = TREE_CHAIN (tail))
5340 if (TREE_PURPOSE (tail) == name)
5342 enum tree_code code = TREE_CODE (TREE_VALUE (tail));
5343 /* Should tighten this up; it'll probably permit
5344 UNION_TYPE and a struct template, for example. */
5346 && !(form != ENUMERAL_TYPE && code == TEMPLATE_DECL))
5348 /* Definition isn't the kind we were looking for. */
5349 cp_error ("`%#D' redeclared as %C", TREE_VALUE (tail),
5353 return TREE_VALUE (tail);
5356 if (thislevel_only && ! level->tag_transparent)
5358 if (level->template_parms_p && allow_template_parms_p)
5360 /* We must deal with cases like this:
5362 template <class T> struct S;
5363 template <class T> struct S {};
5365 When looking up `S', for the second declaration, we
5366 would like to find the first declaration. But, we
5367 are in the pseudo-global level created for the
5368 template parameters, rather than the (surrounding)
5369 namespace level. Thus, we keep going one more level,
5370 even though THISLEVEL_ONLY is non-zero. */
5371 allow_template_parms_p = 0;
5383 set_current_level_tags_transparency (tags_transparent)
5384 int tags_transparent;
5386 current_binding_level->tag_transparent = tags_transparent;
5390 /* Given a type, find the tag that was defined for it and return the tag name.
5391 Otherwise return 0. However, the value can never be 0
5392 in the cases in which this is used.
5394 C++: If NAME is non-zero, this is the new name to install. This is
5395 done when replacing anonymous tags with real tag names. */
5398 lookup_tag_reverse (type, name)
5402 register struct binding_level *level;
5404 for (level = current_binding_level; level; level = level->level_chain)
5407 for (tail = level->tags; tail; tail = TREE_CHAIN (tail))
5409 if (TREE_VALUE (tail) == type)
5412 TREE_PURPOSE (tail) = name;
5413 return TREE_PURPOSE (tail);
5420 /* Look up NAME in the NAMESPACE. */
5423 lookup_namespace_name (namespace, name)
5424 tree namespace, name;
5427 tree template_id = NULL_TREE;
5429 my_friendly_assert (TREE_CODE (namespace) == NAMESPACE_DECL, 370);
5431 if (TREE_CODE (name) == NAMESPACE_DECL)
5432 /* This happens for A::B<int> when B is a namespace. */
5434 else if (TREE_CODE (name) == TEMPLATE_DECL)
5436 /* This happens for A::B where B is a template, and there are no
5437 template arguments. */
5438 cp_error ("invalid use of `%D'", name);
5439 return error_mark_node;
5442 namespace = ORIGINAL_NAMESPACE (namespace);
5444 if (TREE_CODE (name) == TEMPLATE_ID_EXPR)
5447 name = TREE_OPERAND (name, 0);
5448 if (TREE_CODE (name) == OVERLOAD)
5449 name = DECL_NAME (OVL_CURRENT (name));
5450 else if (DECL_P (name))
5451 name = DECL_NAME (name);
5454 my_friendly_assert (TREE_CODE (name) == IDENTIFIER_NODE, 373);
5456 val = make_node (CPLUS_BINDING);
5457 if (!qualified_lookup_using_namespace (name, namespace, val, 0))
5458 return error_mark_node;
5460 if (BINDING_VALUE (val))
5462 val = BINDING_VALUE (val);
5466 if (DECL_CLASS_TEMPLATE_P (val))
5467 val = lookup_template_class (val,
5468 TREE_OPERAND (template_id, 1),
5469 /*in_decl=*/NULL_TREE,
5470 /*context=*/NULL_TREE,
5471 /*entering_scope=*/0);
5472 else if (DECL_FUNCTION_TEMPLATE_P (val)
5473 || TREE_CODE (val) == OVERLOAD)
5474 val = lookup_template_function (val,
5475 TREE_OPERAND (template_id, 1));
5478 cp_error ("`%D::%D' is not a template",
5480 return error_mark_node;
5484 /* If we have a single function from a using decl, pull it out. */
5485 if (TREE_CODE (val) == OVERLOAD && ! really_overloaded_fn (val))
5486 val = OVL_FUNCTION (val);
5490 cp_error ("`%D' undeclared in namespace `%D'", name, namespace);
5491 return error_mark_node;
5494 /* Hash a TYPENAME_TYPE. K is really of type `tree'. */
5496 static unsigned long
5504 hash = (((unsigned long) TYPE_CONTEXT (t))
5505 ^ ((unsigned long) DECL_NAME (TYPE_NAME (t))));
5510 /* Compare two TYPENAME_TYPEs. K1 and K2 are really of type `tree'. */
5513 typename_compare (k1, k2)
5524 d1 = TYPE_NAME (t1);
5525 d2 = TYPE_NAME (t2);
5527 return (DECL_NAME (d1) == DECL_NAME (d2)
5528 && same_type_p (TYPE_CONTEXT (t1), TYPE_CONTEXT (t2))
5529 && ((TREE_TYPE (t1) != NULL_TREE)
5530 == (TREE_TYPE (t2) != NULL_TREE))
5531 && same_type_p (TREE_TYPE (t1), TREE_TYPE (t2))
5532 && TYPENAME_TYPE_FULLNAME (t1) == TYPENAME_TYPE_FULLNAME (t2));
5535 /* Build a TYPENAME_TYPE. If the type is `typename T::t', CONTEXT is
5536 the type of `T', NAME is the IDENTIFIER_NODE for `t'. If BASE_TYPE
5537 is non-NULL, this type is being created by the implicit typename
5538 extension, and BASE_TYPE is a type named `t' in some base class of
5539 `T' which depends on template parameters.
5541 Returns the new TYPENAME_TYPE. */
5544 build_typename_type (context, name, fullname, base_type)
5552 struct hash_entry* e;
5554 static struct hash_table ht;
5558 static struct hash_table *h = &ht;
5559 if (!hash_table_init (&ht, &hash_newfunc, &typename_hash,
5561 fatal ("virtual memory exhausted");
5562 ggc_add_tree_hash_table_root (&h, 1);
5565 /* Build the TYPENAME_TYPE. */
5566 t = make_aggr_type (TYPENAME_TYPE);
5567 TYPE_CONTEXT (t) = FROB_CONTEXT (context);
5568 TYPENAME_TYPE_FULLNAME (t) = fullname;
5569 TREE_TYPE (t) = base_type;
5571 /* Build the corresponding TYPE_DECL. */
5572 d = build_decl (TYPE_DECL, name, t);
5573 TYPE_NAME (TREE_TYPE (d)) = d;
5574 TYPE_STUB_DECL (TREE_TYPE (d)) = d;
5575 DECL_CONTEXT (d) = FROB_CONTEXT (context);
5576 DECL_ARTIFICIAL (d) = 1;
5578 /* See if we already have this type. */
5579 e = hash_lookup (&ht, t, /*create=*/false, /*copy=*/0);
5583 /* Insert the type into the table. */
5584 hash_lookup (&ht, t, /*create=*/true, /*copy=*/0);
5589 /* Resolve `typename CONTEXT::NAME'. Returns an appropriate type,
5590 unless an error occurs, in which case error_mark_node is returned.
5591 If COMPLAIN zero, don't complain about any errors that occur. */
5594 make_typename_type (context, name, complain)
5602 if (!(TYPE_LANG_SPECIFIC (name)
5603 && (CLASSTYPE_IS_TEMPLATE (name)
5604 || CLASSTYPE_USE_TEMPLATE (name))))
5605 name = TYPE_IDENTIFIER (name);
5607 /* Create a TEMPLATE_ID_EXPR for the type. */
5608 name = build_nt (TEMPLATE_ID_EXPR,
5609 CLASSTYPE_TI_TEMPLATE (name),
5610 CLASSTYPE_TI_ARGS (name));
5612 else if (TREE_CODE (name) == TYPE_DECL)
5613 name = DECL_NAME (name);
5617 if (TREE_CODE (name) == TEMPLATE_ID_EXPR)
5619 name = TREE_OPERAND (name, 0);
5620 if (TREE_CODE (name) == TEMPLATE_DECL)
5621 name = TREE_OPERAND (fullname, 0) = DECL_NAME (name);
5623 if (TREE_CODE (name) != IDENTIFIER_NODE)
5624 my_friendly_abort (2000);
5626 if (TREE_CODE (context) == NAMESPACE_DECL)
5628 /* We can get here from typename_sub0 in the explicit_template_type
5629 expansion. Just fail. */
5631 cp_error ("no class template named `%#T' in `%#T'",
5633 return error_mark_node;
5636 if (! uses_template_parms (context)
5637 || currently_open_class (context))
5639 if (TREE_CODE (fullname) == TEMPLATE_ID_EXPR)
5641 tree tmpl = NULL_TREE;
5642 if (IS_AGGR_TYPE (context))
5643 tmpl = lookup_field (context, name, 0, 0);
5644 if (!tmpl || !DECL_CLASS_TEMPLATE_P (tmpl))
5647 cp_error ("no class template named `%#T' in `%#T'",
5649 return error_mark_node;
5652 return lookup_template_class (tmpl,
5653 TREE_OPERAND (fullname, 1),
5655 /*entering_scope=*/0);
5661 if (!IS_AGGR_TYPE (context))
5664 cp_error ("no type named `%#T' in `%#T'", name, context);
5665 return error_mark_node;
5668 t = lookup_field (context, name, 0, 1);
5670 return TREE_TYPE (t);
5674 /* If the CONTEXT is not a template type, then either the field is
5675 there now or its never going to be. */
5676 if (!uses_template_parms (context))
5679 cp_error ("no type named `%#T' in `%#T'", name, context);
5680 return error_mark_node;
5684 return build_typename_type (context, name, fullname, NULL_TREE);
5687 /* Select the right _DECL from multiple choices. */
5690 select_decl (binding, flags)
5695 val = BINDING_VALUE (binding);
5697 /* When we implicitly declare some builtin entity, we mark it
5698 DECL_ANTICIPATED, so that we know to ignore it until it is
5700 if (val && DECL_P (val)
5701 && DECL_LANG_SPECIFIC (val)
5702 && DECL_ANTICIPATED (val))
5705 if (LOOKUP_NAMESPACES_ONLY (flags))
5707 /* We are not interested in types. */
5708 if (val && TREE_CODE (val) == NAMESPACE_DECL)
5713 /* If we could have a type and
5714 we have nothing or we need a type and have none. */
5715 if (BINDING_TYPE (binding)
5716 && (!val || ((flags & LOOKUP_PREFER_TYPES)
5717 && TREE_CODE (val) != TYPE_DECL)))
5718 val = TYPE_STUB_DECL (BINDING_TYPE (binding));
5719 /* Don't return non-types if we really prefer types. */
5720 else if (val && LOOKUP_TYPES_ONLY (flags) && TREE_CODE (val) != TYPE_DECL
5721 && (TREE_CODE (val) != TEMPLATE_DECL
5722 || !DECL_CLASS_TEMPLATE_P (val)))
5728 /* Unscoped lookup of a global: iterate over current namespaces,
5729 considering using-directives. If SPACESP is non-NULL, store a list
5730 of the namespaces we've considered in it. */
5733 unqualified_namespace_lookup (name, flags, spacesp)
5738 tree b = make_node (CPLUS_BINDING);
5739 tree initial = current_decl_namespace();
5740 tree scope = initial;
5742 struct binding_level *level;
5743 tree val = NULL_TREE;
5746 *spacesp = NULL_TREE;
5748 for (; !val; scope = CP_DECL_CONTEXT (scope))
5751 *spacesp = tree_cons (scope, NULL_TREE, *spacesp);
5752 val = binding_for_name (name, scope);
5754 /* Initialize binding for this context. */
5755 BINDING_VALUE (b) = BINDING_VALUE (val);
5756 BINDING_TYPE (b) = BINDING_TYPE (val);
5758 /* Add all _DECLs seen through local using-directives. */
5759 for (level = current_binding_level;
5760 !level->namespace_p;
5761 level = level->level_chain)
5762 if (!lookup_using_namespace (name, b, level->using_directives,
5763 scope, flags, spacesp))
5764 /* Give up because of error. */
5765 return error_mark_node;
5767 /* Add all _DECLs seen through global using-directives. */
5768 /* XXX local and global using lists should work equally. */
5772 if (!lookup_using_namespace (name, b, DECL_NAMESPACE_USING (siter),
5773 scope, flags, spacesp))
5774 /* Give up because of error. */
5775 return error_mark_node;
5776 if (siter == scope) break;
5777 siter = CP_DECL_CONTEXT (siter);
5780 val = select_decl (b, flags);
5781 if (scope == global_namespace)
5787 /* Combine prefer_type and namespaces_only into flags. */
5790 lookup_flags (prefer_type, namespaces_only)
5791 int prefer_type, namespaces_only;
5793 if (namespaces_only)
5794 return LOOKUP_PREFER_NAMESPACES;
5795 if (prefer_type > 1)
5796 return LOOKUP_PREFER_TYPES;
5797 if (prefer_type > 0)
5798 return LOOKUP_PREFER_BOTH;
5802 /* Given a lookup that returned VAL, use FLAGS to decide if we want to
5803 ignore it or not. Subroutine of lookup_name_real. */
5806 qualify_lookup (val, flags)
5810 if (val == NULL_TREE)
5812 if ((flags & LOOKUP_PREFER_NAMESPACES) && TREE_CODE (val) == NAMESPACE_DECL)
5814 if ((flags & LOOKUP_PREFER_TYPES)
5815 && (TREE_CODE (val) == TYPE_DECL
5816 || ((flags & LOOKUP_TEMPLATES_EXPECTED)
5817 && DECL_CLASS_TEMPLATE_P (val))))
5819 if (flags & (LOOKUP_PREFER_NAMESPACES | LOOKUP_PREFER_TYPES))
5824 /* Any other BINDING overrides an implicit TYPENAME. Warn about
5828 warn_about_implicit_typename_lookup (typename, binding)
5832 tree subtype = TREE_TYPE (TREE_TYPE (typename));
5833 tree name = DECL_NAME (typename);
5835 if (! (TREE_CODE (binding) == TEMPLATE_DECL
5836 && CLASSTYPE_TEMPLATE_INFO (subtype)
5837 && CLASSTYPE_TI_TEMPLATE (subtype) == binding)
5838 && ! (TREE_CODE (binding) == TYPE_DECL
5839 && same_type_p (TREE_TYPE (binding), subtype)))
5841 cp_warning ("lookup of `%D' finds `%#D'",
5843 cp_warning (" instead of `%D' from dependent base class",
5845 cp_warning (" (use `typename %T::%D' if that's what you meant)",
5846 constructor_name (current_class_type), name);
5850 /* Look up NAME in the current binding level and its superiors in the
5851 namespace of variables, functions and typedefs. Return a ..._DECL
5852 node of some kind representing its definition if there is only one
5853 such declaration, or return a TREE_LIST with all the overloaded
5854 definitions if there are many, or return 0 if it is undefined.
5856 If PREFER_TYPE is > 0, we prefer TYPE_DECLs or namespaces.
5857 If PREFER_TYPE is > 1, we reject non-type decls (e.g. namespaces).
5858 If PREFER_TYPE is -2, we're being called from yylex(). (UGLY)
5859 Otherwise we prefer non-TYPE_DECLs.
5861 If NONCLASS is non-zero, we don't look for the NAME in class scope,
5862 using IDENTIFIER_CLASS_VALUE. */
5865 lookup_name_real (name, prefer_type, nonclass, namespaces_only)
5867 int prefer_type, nonclass, namespaces_only;
5870 tree val = NULL_TREE;
5872 tree from_obj = NULL_TREE;
5874 int val_is_implicit_typename = 0;
5876 /* Hack: copy flag set by parser, if set. */
5877 if (only_namespace_names)
5878 namespaces_only = 1;
5880 if (prefer_type == -2)
5882 extern int looking_for_typename;
5883 tree type = NULL_TREE;
5886 prefer_type = looking_for_typename;
5888 flags = lookup_flags (prefer_type, namespaces_only);
5889 /* If the next thing is '<', class templates are types. */
5890 if (looking_for_template)
5891 flags |= LOOKUP_TEMPLATES_EXPECTED;
5893 /* std:: becomes :: for now. */
5894 if (got_scope && got_scope == fake_std_node)
5895 got_scope = void_type_node;
5899 else if (got_object != error_mark_node)
5904 if (type == error_mark_node)
5905 return error_mark_node;
5906 if (TREE_CODE (type) == TYPENAME_TYPE && TREE_TYPE (type))
5907 type = TREE_TYPE (type);
5910 type = complete_type (type);
5912 if (TREE_CODE (type) == VOID_TYPE)
5913 type = global_namespace;
5914 if (TREE_CODE (type) == NAMESPACE_DECL)
5916 val = make_node (CPLUS_BINDING);
5917 flags |= LOOKUP_COMPLAIN;
5918 if (!qualified_lookup_using_namespace (name, type, val, flags))
5920 val = select_decl (val, flags);
5922 else if (! IS_AGGR_TYPE (type)
5923 || TREE_CODE (type) == TEMPLATE_TYPE_PARM
5924 || TREE_CODE (type) == BOUND_TEMPLATE_TEMPLATE_PARM
5925 || TREE_CODE (type) == TYPENAME_TYPE)
5926 /* Someone else will give an error about this if needed. */
5928 else if (type == current_class_type)
5929 val = IDENTIFIER_CLASS_VALUE (name);
5932 val = lookup_member (type, name, 0, prefer_type);
5933 type_access_control (type, val);
5935 /* Restore the containing TYPENAME_TYPE if we looked
5936 through it before. */
5937 if (got_scope && got_scope != type
5938 && val && TREE_CODE (val) == TYPE_DECL
5939 && TREE_CODE (TREE_TYPE (val)) == TYPENAME_TYPE)
5940 TYPE_CONTEXT (TREE_TYPE (val)) = got_scope;
5948 else if (got_object && val)
5956 flags = lookup_flags (prefer_type, namespaces_only);
5957 /* If we're not parsing, we need to complain. */
5958 flags |= LOOKUP_COMPLAIN;
5961 /* First, look in non-namespace scopes. */
5963 if (current_class_type == NULL_TREE)
5966 for (t = IDENTIFIER_BINDING (name); t; t = TREE_CHAIN (t))
5970 if (!LOCAL_BINDING_P (t) && nonclass)
5971 /* We're not looking for class-scoped bindings, so keep going. */
5974 /* If this is the kind of thing we're looking for, we're done. */
5975 if (qualify_lookup (BINDING_VALUE (t), flags))
5976 binding = BINDING_VALUE (t);
5977 else if ((flags & LOOKUP_PREFER_TYPES)
5978 && qualify_lookup (BINDING_TYPE (t), flags))
5979 binding = BINDING_TYPE (t);
5981 binding = NULL_TREE;
5983 /* Handle access control on types from enclosing or base classes. */
5984 if (binding && ! yylex
5985 && BINDING_LEVEL (t) && BINDING_LEVEL (t)->parm_flag == 2)
5986 type_access_control (BINDING_LEVEL (t)->this_class, binding);
5989 && (!val || !IMPLICIT_TYPENAME_TYPE_DECL_P (binding)))
5991 if (val_is_implicit_typename && !yylex)
5992 warn_about_implicit_typename_lookup (val, binding);
5994 val_is_implicit_typename
5995 = IMPLICIT_TYPENAME_TYPE_DECL_P (val);
5996 if (!val_is_implicit_typename)
6001 /* Now lookup in namespace scopes. */
6002 if (!val || val_is_implicit_typename)
6004 t = unqualified_namespace_lookup (name, flags, 0);
6007 if (val_is_implicit_typename && !yylex)
6008 warn_about_implicit_typename_lookup (val, t);
6016 /* This should only warn about types used in qualified-ids. */
6017 if (from_obj && from_obj != val)
6019 if (looking_for_typename && TREE_CODE (from_obj) == TYPE_DECL
6020 && TREE_CODE (val) == TYPE_DECL
6021 && ! same_type_p (TREE_TYPE (from_obj), TREE_TYPE (val)))
6023 lookup of `%D' in the scope of `%#T' (`%#T') \
6024 does not match lookup in the current scope (`%#T')",
6025 name, got_object, TREE_TYPE (from_obj),
6028 /* We don't change val to from_obj if got_object depends on
6029 template parms because that breaks implicit typename for
6030 destructor calls. */
6031 if (! uses_template_parms (got_object))
6035 /* If we have a single function from a using decl, pull it out. */
6036 if (TREE_CODE (val) == OVERLOAD && ! really_overloaded_fn (val))
6037 val = OVL_FUNCTION (val);
6046 lookup_name_nonclass (name)
6049 return lookup_name_real (name, 0, 1, 0);
6053 lookup_function_nonclass (name, args)
6057 return lookup_arg_dependent (name, lookup_name_nonclass (name), args);
6061 lookup_name_namespace_only (name)
6064 /* type-or-namespace, nonclass, namespace_only */
6065 return lookup_name_real (name, 1, 1, 1);
6069 lookup_name (name, prefer_type)
6073 return lookup_name_real (name, prefer_type, 0, 0);
6076 /* Similar to `lookup_name' but look only in the innermost non-class
6080 lookup_name_current_level (name)
6083 struct binding_level *b;
6086 b = current_binding_level;
6087 while (b->parm_flag == 2)
6092 t = IDENTIFIER_NAMESPACE_VALUE (name);
6094 /* extern "C" function() */
6095 if (t != NULL_TREE && TREE_CODE (t) == TREE_LIST)
6098 else if (IDENTIFIER_BINDING (name)
6099 && LOCAL_BINDING_P (IDENTIFIER_BINDING (name)))
6103 if (BINDING_LEVEL (IDENTIFIER_BINDING (name)) == b)
6104 return IDENTIFIER_VALUE (name);
6116 /* Like lookup_name_current_level, but for types. */
6119 lookup_type_current_level (name)
6122 register tree t = NULL_TREE;
6124 my_friendly_assert (! current_binding_level->namespace_p, 980716);
6126 if (REAL_IDENTIFIER_TYPE_VALUE (name) != NULL_TREE
6127 && REAL_IDENTIFIER_TYPE_VALUE (name) != global_type_node)
6129 struct binding_level *b = current_binding_level;
6132 if (purpose_member (name, b->type_shadowed))
6133 return REAL_IDENTIFIER_TYPE_VALUE (name);
6145 begin_only_namespace_names ()
6147 only_namespace_names = 1;
6151 end_only_namespace_names ()
6153 only_namespace_names = 0;
6156 /* Push the declarations of builtin types into the namespace.
6157 RID_INDEX is the index of the builtin type
6158 in the array RID_POINTERS. NAME is the name used when looking
6159 up the builtin type. TYPE is the _TYPE node for the builtin type. */
6162 record_builtin_type (rid_index, name, type)
6167 tree rname = NULL_TREE, tname = NULL_TREE;
6168 tree tdecl = NULL_TREE;
6170 if ((int) rid_index < (int) RID_MAX)
6171 rname = ridpointers[(int) rid_index];
6173 tname = get_identifier (name);
6175 TYPE_BUILT_IN (type) = 1;
6179 tdecl = pushdecl (build_decl (TYPE_DECL, tname, type));
6180 set_identifier_type_value (tname, NULL_TREE);
6181 if ((int) rid_index < (int) RID_MAX)
6182 /* Built-in types live in the global namespace. */
6183 SET_IDENTIFIER_GLOBAL_VALUE (tname, tdecl);
6185 if (rname != NULL_TREE)
6187 if (tname != NULL_TREE)
6189 set_identifier_type_value (rname, NULL_TREE);
6190 SET_IDENTIFIER_GLOBAL_VALUE (rname, tdecl);
6194 tdecl = pushdecl (build_decl (TYPE_DECL, rname, type));
6195 set_identifier_type_value (rname, NULL_TREE);
6200 /* Record one of the standard Java types.
6201 * Declare it as having the given NAME.
6202 * If SIZE > 0, it is the size of one of the integral types;
6203 * otherwise it is the negative of the size of one of the other types. */
6206 record_builtin_java_type (name, size)
6212 type = make_signed_type (size);
6213 else if (size > -32)
6214 { /* "__java_char" or ""__java_boolean". */
6215 type = make_unsigned_type (-size);
6216 /*if (size == -1) TREE_SET_CODE (type, BOOLEAN_TYPE);*/
6219 { /* "__java_float" or ""__java_double". */
6220 type = make_node (REAL_TYPE);
6221 TYPE_PRECISION (type) = - size;
6224 record_builtin_type (RID_MAX, name, type);
6225 decl = TYPE_NAME (type);
6227 /* Suppress generate debug symbol entries for these types,
6228 since for normal C++ they are just clutter.
6229 However, push_lang_context undoes this if extern "Java" is seen. */
6230 DECL_IGNORED_P (decl) = 1;
6232 TYPE_FOR_JAVA (type) = 1;
6236 /* Push a type into the namespace so that the back-ends ignore it. */
6239 record_unknown_type (type, name)
6243 tree decl = pushdecl (build_decl (TYPE_DECL, get_identifier (name), type));
6244 /* Make sure the "unknown type" typedecl gets ignored for debug info. */
6245 DECL_IGNORED_P (decl) = 1;
6246 TYPE_DECL_SUPPRESS_DEBUG (decl) = 1;
6247 TYPE_SIZE (type) = TYPE_SIZE (void_type_node);
6248 TYPE_ALIGN (type) = 1;
6249 TYPE_USER_ALIGN (type) = 0;
6250 TYPE_MODE (type) = TYPE_MODE (void_type_node);
6253 /* An string for which we should create an IDENTIFIER_NODE at
6256 typedef struct predefined_identifier
6258 /* The name of the identifier. */
6260 /* The place where the IDENTIFIER_NODE should be stored. */
6262 /* Non-zero if this is the name of a constructor or destructor. */
6264 } predefined_identifier;
6266 /* Create all the predefined identifiers. */
6269 initialize_predefined_identifiers ()
6271 struct predefined_identifier *pid;
6273 /* A table of identifiers to create at startup. */
6274 static predefined_identifier predefined_identifiers[] = {
6275 { "C++", &lang_name_cplusplus, 0 },
6276 { "C", &lang_name_c, 0 },
6277 { "Java", &lang_name_java, 0 },
6278 { CTOR_NAME, &ctor_identifier, 1 },
6279 { "__base_ctor", &base_ctor_identifier, 1 },
6280 { "__comp_ctor", &complete_ctor_identifier, 1 },
6281 { DTOR_NAME, &dtor_identifier, 1 },
6282 { "__comp_dtor", &complete_dtor_identifier, 1 },
6283 { "__base_dtor", &base_dtor_identifier, 1 },
6284 { "__deleting_dtor", &deleting_dtor_identifier, 1 },
6285 { VTABLE_DELTA2_NAME, &delta2_identifier, 0 },
6286 { VTABLE_DELTA_NAME, &delta_identifier, 0 },
6287 { IN_CHARGE_NAME, &in_charge_identifier, 0 },
6288 { VTABLE_INDEX_NAME, &index_identifier, 0 },
6289 { "nelts", &nelts_identifier, 0 },
6290 { THIS_NAME, &this_identifier, 0 },
6291 { VTABLE_PFN_NAME, &pfn_identifier, 0 },
6292 { "__pfn_or_delta2", &pfn_or_delta2_identifier, 0 },
6293 { "_vptr", &vptr_identifier, 0 },
6294 { "__cp_push_exception", &cp_push_exception_identifier, 0 },
6295 { "__vtt_parm", &vtt_parm_identifier, 0 },
6296 { "std", &std_identifier, 0 },
6300 for (pid = predefined_identifiers; pid->name; ++pid)
6302 *pid->node = get_identifier (pid->name);
6303 if (pid->ctor_or_dtor_p)
6304 IDENTIFIER_CTOR_OR_DTOR_P (*pid->node) = 1;
6308 /* Create the predefined scalar types of C,
6309 and some nodes representing standard constants (0, 1, (void *)0).
6310 Initialize the global binding level.
6311 Make definitions for built-in primitive functions. */
6314 init_decl_processing ()
6317 int wchar_type_size;
6318 tree array_domain_type;
6320 /* Check to see that the user did not specify an invalid combination
6321 of command-line options. */
6322 if (flag_new_abi && !flag_vtable_thunks)
6323 fatal ("the new ABI requires vtable thunks");
6325 /* Create all the identifiers we need. */
6326 initialize_predefined_identifiers ();
6328 /* Fill in back-end hooks. */
6329 init_lang_status = &push_cp_function_context;
6330 free_lang_status = &pop_cp_function_context;
6331 mark_lang_status = &mark_cp_function_context;
6332 lang_safe_from_p = &c_safe_from_p;
6338 /* Create the global variables. */
6339 push_to_top_level ();
6341 /* Enter the global namespace. */
6342 my_friendly_assert (global_namespace == NULL_TREE, 375);
6343 push_namespace (get_identifier ("::"));
6344 global_namespace = current_namespace;
6345 current_lang_name = NULL_TREE;
6347 /* Adjust various flags based on command-line settings. */
6348 if (! flag_permissive && ! pedantic)
6349 flag_pedantic_errors = 1;
6350 if (!flag_no_inline)
6351 flag_inline_trees = 1;
6354 current_lang_name = lang_name_c;
6356 current_function_decl = NULL_TREE;
6357 current_binding_level = NULL_BINDING_LEVEL;
6358 free_binding_level = NULL_BINDING_LEVEL;
6360 build_common_tree_nodes (flag_signed_char);
6362 error_mark_list = build_tree_list (error_mark_node, error_mark_node);
6363 TREE_TYPE (error_mark_list) = error_mark_node;
6365 /* Make the binding_level structure for global names. */
6367 global_binding_level = current_binding_level;
6368 /* The global level is the namespace level of ::. */
6369 NAMESPACE_LEVEL (global_namespace) = global_binding_level;
6370 declare_namespace_level ();
6372 /* Create the `std' namespace. */
6375 push_namespace (std_identifier);
6376 std_node = current_namespace;
6378 fake_std_node = error_mark_node;
6382 fake_std_node = build_decl (NAMESPACE_DECL,
6385 pushdecl (fake_std_node);
6388 /* Define `int' and `char' first so that dbx will output them first. */
6389 record_builtin_type (RID_INT, NULL_PTR, integer_type_node);
6390 record_builtin_type (RID_CHAR, "char", char_type_node);
6392 /* `signed' is the same as `int' */
6393 record_builtin_type (RID_SIGNED, NULL_PTR, integer_type_node);
6394 record_builtin_type (RID_LONG, "long int", long_integer_type_node);
6395 record_builtin_type (RID_UNSIGNED, "unsigned int", unsigned_type_node);
6396 record_builtin_type (RID_MAX, "long unsigned int",
6397 long_unsigned_type_node);
6398 record_builtin_type (RID_MAX, "unsigned long", long_unsigned_type_node);
6399 record_builtin_type (RID_MAX, "long long int",
6400 long_long_integer_type_node);
6401 record_builtin_type (RID_MAX, "long long unsigned int",
6402 long_long_unsigned_type_node);
6403 record_builtin_type (RID_MAX, "long long unsigned",
6404 long_long_unsigned_type_node);
6405 record_builtin_type (RID_SHORT, "short int", short_integer_type_node);
6406 record_builtin_type (RID_MAX, "short unsigned int",
6407 short_unsigned_type_node);
6408 record_builtin_type (RID_MAX, "unsigned short",
6409 short_unsigned_type_node);
6412 = TREE_TYPE (IDENTIFIER_GLOBAL_VALUE (get_identifier (PTRDIFF_TYPE)));
6413 unsigned_ptrdiff_type_node = unsigned_type (ptrdiff_type_node);
6415 /* Define both `signed char' and `unsigned char'. */
6416 record_builtin_type (RID_MAX, "signed char", signed_char_type_node);
6417 record_builtin_type (RID_MAX, "unsigned char", unsigned_char_type_node);
6419 /* `unsigned long' is the standard type for sizeof.
6420 Note that stddef.h uses `unsigned long',
6421 and this must agree, even if long and int are the same size. */
6423 TREE_TYPE (IDENTIFIER_GLOBAL_VALUE (get_identifier (SIZE_TYPE)));
6424 signed_size_type_node = signed_type (c_size_type_node);
6425 set_sizetype (c_size_type_node);
6427 /* Create the widest literal types. */
6428 widest_integer_literal_type_node = make_signed_type (HOST_BITS_PER_WIDE_INT * 2);
6429 pushdecl (build_decl (TYPE_DECL, NULL_TREE,
6430 widest_integer_literal_type_node));
6432 widest_unsigned_literal_type_node = make_unsigned_type (HOST_BITS_PER_WIDE_INT * 2);
6433 pushdecl (build_decl (TYPE_DECL, NULL_TREE,
6434 widest_unsigned_literal_type_node));
6436 /* These are types that type_for_size and type_for_mode use. */
6437 pushdecl (build_decl (TYPE_DECL, NULL_TREE, intQI_type_node));
6438 pushdecl (build_decl (TYPE_DECL, NULL_TREE, intHI_type_node));
6439 pushdecl (build_decl (TYPE_DECL, NULL_TREE, intSI_type_node));
6440 pushdecl (build_decl (TYPE_DECL, NULL_TREE, intDI_type_node));
6441 #if HOST_BITS_PER_WIDE_INT >= 64
6442 pushdecl (build_decl (TYPE_DECL, get_identifier ("__int128_t"), intTI_type_node));
6444 pushdecl (build_decl (TYPE_DECL, NULL_TREE, unsigned_intQI_type_node));
6445 pushdecl (build_decl (TYPE_DECL, NULL_TREE, unsigned_intHI_type_node));
6446 pushdecl (build_decl (TYPE_DECL, NULL_TREE, unsigned_intSI_type_node));
6447 pushdecl (build_decl (TYPE_DECL, NULL_TREE, unsigned_intDI_type_node));
6448 #if HOST_BITS_PER_WIDE_INT >= 64
6449 pushdecl (build_decl (TYPE_DECL, get_identifier ("__uint128_t"), unsigned_intTI_type_node));
6452 build_common_tree_nodes_2 (flag_short_double);
6454 java_byte_type_node = record_builtin_java_type ("__java_byte", 8);
6455 java_short_type_node = record_builtin_java_type ("__java_short", 16);
6456 java_int_type_node = record_builtin_java_type ("__java_int", 32);
6457 java_long_type_node = record_builtin_java_type ("__java_long", 64);
6458 java_float_type_node = record_builtin_java_type ("__java_float", -32);
6459 java_double_type_node = record_builtin_java_type ("__java_double", -64);
6460 java_char_type_node = record_builtin_java_type ("__java_char", -16);
6461 java_boolean_type_node = record_builtin_java_type ("__java_boolean", -1);
6463 integer_two_node = build_int_2 (2, 0);
6464 TREE_TYPE (integer_two_node) = integer_type_node;
6465 integer_three_node = build_int_2 (3, 0);
6466 TREE_TYPE (integer_three_node) = integer_type_node;
6468 boolean_type_node = make_unsigned_type (BOOL_TYPE_SIZE);
6469 TREE_SET_CODE (boolean_type_node, BOOLEAN_TYPE);
6470 TYPE_MAX_VALUE (boolean_type_node) = build_int_2 (1, 0);
6471 TREE_TYPE (TYPE_MAX_VALUE (boolean_type_node)) = boolean_type_node;
6472 TYPE_PRECISION (boolean_type_node) = 1;
6473 record_builtin_type (RID_BOOL, "bool", boolean_type_node);
6474 boolean_false_node = build_int_2 (0, 0);
6475 TREE_TYPE (boolean_false_node) = boolean_type_node;
6476 boolean_true_node = build_int_2 (1, 0);
6477 TREE_TYPE (boolean_true_node) = boolean_type_node;
6479 signed_size_zero_node = build_int_2 (0, 0);
6480 record_builtin_type (RID_FLOAT, NULL_PTR, float_type_node);
6481 record_builtin_type (RID_DOUBLE, NULL_PTR, double_type_node);
6482 record_builtin_type (RID_MAX, "long double", long_double_type_node);
6484 pushdecl (build_decl (TYPE_DECL, get_identifier ("complex int"),
6485 complex_integer_type_node));
6486 pushdecl (build_decl (TYPE_DECL, get_identifier ("complex float"),
6487 complex_float_type_node));
6488 pushdecl (build_decl (TYPE_DECL, get_identifier ("complex double"),
6489 complex_double_type_node));
6490 pushdecl (build_decl (TYPE_DECL, get_identifier ("complex long double"),
6491 complex_long_double_type_node));
6493 TREE_TYPE (signed_size_zero_node) = make_signed_type (TYPE_PRECISION (sizetype));
6495 record_builtin_type (RID_VOID, NULL_PTR, void_type_node);
6496 void_list_node = build_tree_list (NULL_TREE, void_type_node);
6497 TREE_PARMLIST (void_list_node) = 1;
6499 string_type_node = build_pointer_type (char_type_node);
6500 const_string_type_node
6501 = build_pointer_type (build_qualified_type (char_type_node,
6503 empty_except_spec = build_tree_list (NULL_TREE, NULL_TREE);
6505 record_builtin_type (RID_MAX, NULL_PTR, string_type_node);
6508 /* Make a type to be the domain of a few array types
6509 whose domains don't really matter.
6510 200 is small enough that it always fits in size_t. */
6511 array_domain_type = build_index_type (build_int_2 (200, 0));
6513 /* Make a type for arrays of characters.
6514 With luck nothing will ever really depend on the length of this
6516 char_array_type_node
6517 = build_array_type (char_type_node, array_domain_type);
6519 /* Likewise for arrays of ints. */
6521 = build_array_type (integer_type_node, array_domain_type);
6524 delta_type_node = ptrdiff_type_node;
6525 else if (flag_huge_objects)
6526 delta_type_node = long_integer_type_node;
6528 delta_type_node = short_integer_type_node;
6531 vtable_index_type = ptrdiff_type_node;
6533 vtable_index_type = delta_type_node;
6535 default_function_type
6536 = build_function_type (integer_type_node, NULL_TREE);
6538 ptr_type_node = build_pointer_type (void_type_node);
6540 = build_pointer_type (build_qualified_type (void_type_node,
6542 vtt_parm_type = build_pointer_type (const_ptr_type_node);
6543 c_common_nodes_and_builtins ();
6544 lang_type_promotes_to = convert_type_from_ellipsis;
6547 = build_exception_variant (void_ftype_ptr, empty_except_spec);
6549 #ifdef MD_INIT_BUILTINS
6553 /* C++ extensions */
6555 unknown_type_node = make_node (UNKNOWN_TYPE);
6556 record_unknown_type (unknown_type_node, "unknown type");
6558 /* Indirecting an UNKNOWN_TYPE node yields an UNKNOWN_TYPE node. */
6559 TREE_TYPE (unknown_type_node) = unknown_type_node;
6561 TREE_TYPE (null_node) = type_for_size (POINTER_SIZE, 0);
6563 /* Looking up TYPE_POINTER_TO and TYPE_REFERENCE_TO yield the same
6565 TYPE_POINTER_TO (unknown_type_node) = unknown_type_node;
6566 TYPE_REFERENCE_TO (unknown_type_node) = unknown_type_node;
6568 /* This is special for C++ so functions can be overloaded. */
6569 wchar_type_node = get_identifier (flag_short_wchar
6570 ? "short unsigned int"
6572 wchar_type_node = TREE_TYPE (IDENTIFIER_GLOBAL_VALUE (wchar_type_node));
6573 wchar_type_size = TYPE_PRECISION (wchar_type_node);
6574 if (TREE_UNSIGNED (wchar_type_node))
6575 wchar_type_node = make_signed_type (wchar_type_size);
6577 wchar_type_node = make_unsigned_type (wchar_type_size);
6578 record_builtin_type (RID_WCHAR, "__wchar_t", wchar_type_node);
6580 /* Artificial declaration of wchar_t -- can be bashed */
6581 wchar_decl_node = build_decl (TYPE_DECL, get_identifier ("wchar_t"),
6583 pushdecl (wchar_decl_node);
6585 /* This is for wide string constants. */
6586 wchar_array_type_node
6587 = build_array_type (wchar_type_node, array_domain_type);
6590 TREE_TYPE (IDENTIFIER_GLOBAL_VALUE (get_identifier (WINT_TYPE)));
6593 TREE_TYPE (IDENTIFIER_GLOBAL_VALUE (get_identifier (INTMAX_TYPE)));
6595 TREE_TYPE (IDENTIFIER_GLOBAL_VALUE (get_identifier (UINTMAX_TYPE)));
6597 if (flag_vtable_thunks)
6599 /* Make sure we get a unique function type, so we can give
6600 its pointer type a name. (This wins for gdb.) */
6601 tree vfunc_type = make_node (FUNCTION_TYPE);
6602 TREE_TYPE (vfunc_type) = integer_type_node;
6603 TYPE_ARG_TYPES (vfunc_type) = NULL_TREE;
6604 layout_type (vfunc_type);
6606 vtable_entry_type = build_pointer_type (vfunc_type);
6610 vtable_entry_type = make_aggr_type (RECORD_TYPE);
6611 fields[0] = build_decl (FIELD_DECL, delta_identifier,
6613 fields[1] = build_decl (FIELD_DECL, index_identifier,
6615 fields[2] = build_decl (FIELD_DECL, pfn_identifier,
6617 finish_builtin_type (vtable_entry_type, VTBL_PTR_TYPE, fields, 2,
6620 /* Make this part of an invisible union. */
6621 fields[3] = copy_node (fields[2]);
6622 TREE_TYPE (fields[3]) = delta_type_node;
6623 DECL_NAME (fields[3]) = delta2_identifier;
6624 DECL_MODE (fields[3]) = TYPE_MODE (delta_type_node);
6625 DECL_SIZE (fields[3]) = TYPE_SIZE (delta_type_node);
6626 DECL_SIZE_UNIT (fields[3]) = TYPE_SIZE_UNIT (delta_type_node);
6627 TREE_UNSIGNED (fields[3]) = 0;
6628 TREE_CHAIN (fields[2]) = fields[3];
6629 vtable_entry_type = build_qualified_type (vtable_entry_type,
6632 record_builtin_type (RID_MAX, VTBL_PTR_TYPE, vtable_entry_type);
6635 = build_cplus_array_type (vtable_entry_type, NULL_TREE);
6636 layout_type (vtbl_type_node);
6637 vtbl_type_node = build_qualified_type (vtbl_type_node, TYPE_QUAL_CONST);
6638 record_builtin_type (RID_MAX, NULL_PTR, vtbl_type_node);
6639 vtbl_ptr_type_node = build_pointer_type (vtable_entry_type);
6640 layout_type (vtbl_ptr_type_node);
6641 record_builtin_type (RID_MAX, NULL_PTR, vtbl_ptr_type_node);
6645 push_namespace (get_identifier ("__cxxabiv1"));
6646 abi_node = current_namespace;
6650 global_type_node = make_node (LANG_TYPE);
6651 record_unknown_type (global_type_node, "global type");
6654 current_lang_name = lang_name_cplusplus;
6657 tree bad_alloc_type_node, newtype, deltype;
6659 push_namespace (std_identifier);
6660 bad_alloc_type_node = xref_tag
6661 (class_type_node, get_identifier ("bad_alloc"), 1);
6664 newtype = build_exception_variant
6665 (ptr_ftype_sizetype, add_exception_specifier (NULL_TREE, bad_alloc_type_node, -1));
6666 deltype = build_exception_variant (void_ftype_ptr, empty_except_spec);
6667 push_cp_library_fn (NEW_EXPR, newtype);
6668 push_cp_library_fn (VEC_NEW_EXPR, newtype);
6669 global_delete_fndecl = push_cp_library_fn (DELETE_EXPR, deltype);
6670 push_cp_library_fn (VEC_DELETE_EXPR, deltype);
6674 = build_library_fn_ptr ("__pure_virtual", void_ftype);
6676 /* Perform other language dependent initializations. */
6677 init_class_processing ();
6678 init_init_processing ();
6679 init_search_processing ();
6680 init_rtti_processing ();
6682 if (flag_exceptions)
6683 init_exception_processing ();
6686 flag_inline_functions = 0;
6689 if (! supports_one_only ())
6692 /* Create the global bindings for __FUNCTION__ and __PRETTY_FUNCTION__. */
6693 function_id_node = get_identifier ("__FUNCTION__");
6694 pretty_function_id_node = get_identifier ("__PRETTY_FUNCTION__");
6695 func_id_node = get_identifier ("__func__");
6697 make_fname_decl = cp_make_fname_decl;
6698 declare_function_name ();
6700 /* Prepare to check format strings against argument lists. */
6701 init_function_format_info ();
6703 /* Show we use EH for cleanups. */
6704 using_eh_for_cleanups ();
6706 valid_lang_attribute = cp_valid_lang_attribute;
6708 /* Maintain consistency. Perhaps we should just complain if they
6709 say -fwritable-strings? */
6710 if (flag_writable_strings)
6711 flag_const_strings = 0;
6713 /* Add GC roots for all of our global variables. */
6714 ggc_add_tree_root (c_global_trees, sizeof c_global_trees / sizeof(tree));
6715 ggc_add_tree_root (cp_global_trees, sizeof cp_global_trees / sizeof(tree));
6716 ggc_add_tree_root (&integer_three_node, 1);
6717 ggc_add_tree_root (&integer_two_node, 1);
6718 ggc_add_tree_root (&signed_size_zero_node, 1);
6719 ggc_add_tree_root (&size_one_node, 1);
6720 ggc_add_tree_root (&size_zero_node, 1);
6721 ggc_add_root (&global_binding_level, 1, sizeof global_binding_level,
6722 mark_binding_level);
6723 ggc_add_root (&scope_chain, 1, sizeof scope_chain, &mark_saved_scope);
6724 ggc_add_tree_root (&static_ctors, 1);
6725 ggc_add_tree_root (&static_dtors, 1);
6726 ggc_add_tree_root (&lastiddecl, 1);
6728 ggc_add_tree_root (&last_function_parm_tags, 1);
6729 ggc_add_tree_root (¤t_function_return_value, 1);
6730 ggc_add_tree_root (¤t_function_parm_tags, 1);
6731 ggc_add_tree_root (&last_function_parms, 1);
6732 ggc_add_tree_root (&error_mark_list, 1);
6734 ggc_add_tree_root (&global_namespace, 1);
6735 ggc_add_tree_root (&global_type_node, 1);
6736 ggc_add_tree_root (&anonymous_namespace_name, 1);
6738 ggc_add_tree_root (&got_object, 1);
6739 ggc_add_tree_root (&got_scope, 1);
6741 ggc_add_tree_root (¤t_lang_name, 1);
6742 ggc_add_tree_root (&static_aggregates, 1);
6745 /* Create the VAR_DECL for __FUNCTION__ etc. ID is the name to give the
6746 decl, NAME is the initialization string and TYPE_DEP indicates whether
6747 NAME depended on the type of the function. We make use of that to detect
6748 __PRETTY_FUNCTION__ inside a template fn. Because we build a tree for
6749 the function before emitting any of it, we don't need to treat the
6750 VAR_DECL specially. We can decide whether to emit it later, if it was
6754 cp_make_fname_decl (id, name, type_dep)
6759 tree decl, type, init;
6760 size_t length = strlen (name);
6761 tree domain = NULL_TREE;
6763 if (!processing_template_decl)
6766 domain = build_index_type (build_int_2 (length, 0));
6768 type = build_cplus_array_type
6769 (build_qualified_type (char_type_node, TYPE_QUAL_CONST),
6772 decl = build_decl (VAR_DECL, id, type);
6773 TREE_STATIC (decl) = 1;
6774 TREE_READONLY (decl) = 1;
6775 DECL_SOURCE_LINE (decl) = 0;
6776 DECL_ARTIFICIAL (decl) = 1;
6777 DECL_IN_SYSTEM_HEADER (decl) = 1;
6779 if (processing_template_decl)
6780 decl = push_template_decl (decl);
6783 init = build (FUNCTION_NAME, type);
6784 DECL_PRETTY_FUNCTION_P (decl) = 1;
6788 init = build_string (length + 1, name);
6789 TREE_TYPE (init) = type;
6791 DECL_INITIAL (decl) = init;
6792 cp_finish_decl (decl, init, NULL_TREE, LOOKUP_ONLYCONVERTING);
6794 /* We will have to make sure we only emit this, if it is actually used. */
6798 /* Entry point for the benefit of c_common_nodes_and_builtins.
6800 Make a definition for a builtin function named NAME and whose data type
6801 is TYPE. TYPE should be a function type with argument types.
6803 CLASS and CODE tell later passes how to compile calls to this function.
6804 See tree.h for possible values.
6806 If LIBNAME is nonzero, use that for DECL_ASSEMBLER_NAME,
6807 the name to be called if we can't opencode the function. */
6810 builtin_function (name, type, code, class, libname)
6814 enum built_in_class class;
6815 const char *libname;
6817 tree decl = build_library_fn_1 (get_identifier (name), ERROR_MARK, type);
6818 DECL_BUILT_IN_CLASS (decl) = class;
6819 DECL_FUNCTION_CODE (decl) = code;
6821 my_friendly_assert (DECL_CONTEXT (decl) == NULL_TREE, 392);
6823 /* All builtins that don't begin with an `_' should go in the `std'
6825 if (flag_honor_std && name[0] != '_')
6827 push_namespace (std_identifier);
6828 DECL_CONTEXT (decl) = std_node;
6831 if (flag_honor_std && name[0] != '_')
6834 /* Since `pushdecl' relies on DECL_ASSEMBLER_NAME instead of DECL_NAME,
6835 we cannot change DECL_ASSEMBLER_NAME until we have installed this
6836 function in the namespace. */
6838 DECL_ASSEMBLER_NAME (decl) = get_identifier (libname);
6839 make_function_rtl (decl);
6841 /* Warn if a function in the namespace for users
6842 is used without an occasion to consider it declared. */
6843 if (name[0] != '_' || name[1] != '_')
6844 DECL_ANTICIPATED (decl) = 1;
6849 /* Generate a FUNCTION_DECL with the typical flags for a runtime library
6850 function. Not called directly. */
6853 build_library_fn_1 (name, operator_code, type)
6855 enum tree_code operator_code;
6858 tree fn = build_lang_decl (FUNCTION_DECL, name, type);
6859 DECL_EXTERNAL (fn) = 1;
6860 TREE_PUBLIC (fn) = 1;
6861 DECL_ARTIFICIAL (fn) = 1;
6862 TREE_NOTHROW (fn) = 1;
6863 SET_OVERLOADED_OPERATOR_CODE (fn, operator_code);
6867 /* Returns the _DECL for a library function with C linkage.
6868 We assume that such functions never throw; if this is incorrect,
6869 callers should unset TREE_NOTHROW. */
6872 build_library_fn (name, type)
6876 tree fn = build_library_fn_1 (name, ERROR_MARK, type);
6877 make_function_rtl (fn);
6881 /* Returns the _DECL for a library function with C++ linkage. */
6884 build_cp_library_fn (name, operator_code, type)
6886 enum tree_code operator_code;
6889 tree fn = build_library_fn_1 (name, operator_code, type);
6890 TREE_NOTHROW (fn) = TYPE_NOTHROW_P (type);
6891 DECL_CONTEXT (fn) = FROB_CONTEXT (current_namespace);
6892 set_mangled_name_for_decl (fn);
6893 make_function_rtl (fn);
6897 /* Like build_library_fn, but takes a C string instead of an
6901 build_library_fn_ptr (name, type)
6905 return build_library_fn (get_identifier (name), type);
6908 /* Like build_cp_library_fn, but takes a C string instead of an
6912 build_cp_library_fn_ptr (name, type)
6916 return build_cp_library_fn (get_identifier (name), ERROR_MARK, type);
6919 /* Like build_library_fn, but also pushes the function so that we will
6920 be able to find it via IDENTIFIER_GLOBAL_VALUE. */
6923 push_library_fn (name, type)
6926 tree fn = build_library_fn (name, type);
6927 pushdecl_top_level (fn);
6931 /* Like build_cp_library_fn, but also pushes the function so that it
6932 will be found by normal lookup. */
6935 push_cp_library_fn (operator_code, type)
6936 enum tree_code operator_code;
6939 tree fn = build_cp_library_fn (ansi_opname (operator_code),
6946 /* Like push_library_fn, but takes a TREE_LIST of parm types rather than
6950 push_void_library_fn (name, parmtypes)
6951 tree name, parmtypes;
6953 tree type = build_function_type (void_type_node, parmtypes);
6954 return push_library_fn (name, type);
6957 /* Like push_library_fn, but also note that this function throws
6958 and does not return. Used for __throw_foo and the like. */
6961 push_throw_library_fn (name, type)
6964 tree fn = push_library_fn (name, type);
6965 TREE_THIS_VOLATILE (fn) = 1;
6966 TREE_NOTHROW (fn) = 0;
6970 /* When we call finish_struct for an anonymous union, we create
6971 default copy constructors and such. But, an anonymous union
6972 shouldn't have such things; this function undoes the damage to the
6973 anonymous union type T.
6975 (The reason that we create the synthesized methods is that we don't
6976 distinguish `union { int i; }' from `typedef union { int i; } U'.
6977 The first is an anonymous union; the second is just an ordinary
6981 fixup_anonymous_aggr (t)
6986 /* Wipe out memory of synthesized methods */
6987 TYPE_HAS_CONSTRUCTOR (t) = 0;
6988 TYPE_HAS_DEFAULT_CONSTRUCTOR (t) = 0;
6989 TYPE_HAS_INIT_REF (t) = 0;
6990 TYPE_HAS_CONST_INIT_REF (t) = 0;
6991 TYPE_HAS_ASSIGN_REF (t) = 0;
6992 TYPE_HAS_CONST_ASSIGN_REF (t) = 0;
6994 /* Splice the implicitly generated functions out of the TYPE_METHODS
6996 q = &TYPE_METHODS (t);
6999 if (DECL_ARTIFICIAL (*q))
7000 *q = TREE_CHAIN (*q);
7002 q = &TREE_CHAIN (*q);
7005 /* ISO C++ 9.5.3. Anonymous unions may not have function members. */
7006 if (TYPE_METHODS (t))
7007 error ("an anonymous union cannot have function members");
7010 /* Make sure that a declaration with no declarator is well-formed, i.e.
7011 just defines a tagged type or anonymous union.
7013 Returns the type defined, if any. */
7016 check_tag_decl (declspecs)
7021 tree ob_modifier = NULL_TREE;
7023 register tree t = NULL_TREE;
7025 for (link = declspecs; link; link = TREE_CHAIN (link))
7027 register tree value = TREE_VALUE (link);
7030 || (TREE_CODE (value) == IDENTIFIER_NODE
7031 && IDENTIFIER_GLOBAL_VALUE (value)
7032 && TYPE_P (IDENTIFIER_GLOBAL_VALUE (value))))
7036 if ((TREE_CODE (value) != TYPENAME_TYPE && IS_AGGR_TYPE (value))
7037 || TREE_CODE (value) == ENUMERAL_TYPE)
7039 my_friendly_assert (TYPE_MAIN_DECL (value) != NULL_TREE, 261);
7043 else if (value == ridpointers[(int) RID_FRIEND])
7045 if (current_class_type == NULL_TREE
7046 || current_scope () != current_class_type)
7047 ob_modifier = value;
7051 else if (value == ridpointers[(int) RID_STATIC]
7052 || value == ridpointers[(int) RID_EXTERN]
7053 || value == ridpointers[(int) RID_AUTO]
7054 || value == ridpointers[(int) RID_REGISTER]
7055 || value == ridpointers[(int) RID_INLINE]
7056 || value == ridpointers[(int) RID_VIRTUAL]
7057 || value == ridpointers[(int) RID_CONST]
7058 || value == ridpointers[(int) RID_VOLATILE]
7059 || value == ridpointers[(int) RID_EXPLICIT])
7060 ob_modifier = value;
7064 error ("multiple types in one declaration");
7066 if (t == NULL_TREE && ! saw_friend)
7067 pedwarn ("declaration does not declare anything");
7069 /* Check for an anonymous union. We're careful
7070 accessing TYPE_IDENTIFIER because some built-in types, like
7071 pointer-to-member types, do not have TYPE_NAME. */
7072 else if (t && IS_AGGR_TYPE_CODE (TREE_CODE (t))
7074 && ANON_AGGRNAME_P (TYPE_IDENTIFIER (t)))
7076 /* Anonymous unions are objects, so they can have specifiers. */;
7077 SET_ANON_AGGR_TYPE_P (t);
7079 if (TREE_CODE (t) != UNION_TYPE && pedantic && ! in_system_header)
7080 pedwarn ("ISO C++ prohibits anonymous structs");
7083 else if (ob_modifier)
7085 if (ob_modifier == ridpointers[(int) RID_INLINE]
7086 || ob_modifier == ridpointers[(int) RID_VIRTUAL])
7087 cp_error ("`%D' can only be specified for functions", ob_modifier);
7088 else if (ob_modifier == ridpointers[(int) RID_FRIEND])
7089 cp_error ("`%D' can only be specified inside a class", ob_modifier);
7090 else if (ob_modifier == ridpointers[(int) RID_EXPLICIT])
7091 cp_error ("`%D' can only be specified for constructors",
7094 cp_error ("`%D' can only be specified for objects and functions",
7101 /* Called when a declaration is seen that contains no names to declare.
7102 If its type is a reference to a structure, union or enum inherited
7103 from a containing scope, shadow that tag name for the current scope
7104 with a forward reference.
7105 If its type defines a new named structure or union
7106 or defines an enum, it is valid but we need not do anything here.
7107 Otherwise, it is an error.
7109 C++: may have to grok the declspecs to learn about static,
7110 complain for anonymous unions. */
7113 shadow_tag (declspecs)
7116 tree t = check_tag_decl (declspecs);
7119 maybe_process_partial_specialization (t);
7121 /* This is where the variables in an anonymous union are
7122 declared. An anonymous union declaration looks like:
7124 because there is no declarator after the union, the parser
7125 sends that declaration here. */
7126 if (t && ANON_AGGR_TYPE_P (t))
7128 fixup_anonymous_aggr (t);
7130 if (TYPE_FIELDS (t))
7132 tree decl = grokdeclarator (NULL_TREE, declspecs, NORMAL, 0,
7134 finish_anon_union (decl);
7139 /* Decode a "typename", such as "int **", returning a ..._TYPE node. */
7142 groktypename (typename)
7145 if (TREE_CODE (typename) != TREE_LIST)
7147 return grokdeclarator (TREE_VALUE (typename),
7148 TREE_PURPOSE (typename),
7149 TYPENAME, 0, NULL_TREE);
7152 /* Decode a declarator in an ordinary declaration or data definition.
7153 This is called as soon as the type information and variable name
7154 have been parsed, before parsing the initializer if any.
7155 Here we create the ..._DECL node, fill in its type,
7156 and put it on the list of decls for the current context.
7157 The ..._DECL node is returned as the value.
7159 Exception: for arrays where the length is not specified,
7160 the type is left null, to be filled in by `cp_finish_decl'.
7162 Function definitions do not come here; they go to start_function
7163 instead. However, external and forward declarations of functions
7164 do go through here. Structure field declarations are done by
7165 grokfield and not through here. */
7168 start_decl (declarator, declspecs, initialized, attributes, prefix_attributes)
7169 tree declarator, declspecs;
7171 tree attributes, prefix_attributes;
7174 register tree type, tem;
7176 extern int have_extern_spec;
7177 extern int used_extern_spec;
7181 /* See code below that used this. */
7182 int init_written = initialized;
7185 /* This should only be done once on the top most decl. */
7186 if (have_extern_spec && !used_extern_spec)
7188 declspecs = tree_cons (NULL_TREE, get_identifier ("extern"),
7190 used_extern_spec = 1;
7193 if (attributes || prefix_attributes)
7194 attrlist = build_tree_list (attributes, prefix_attributes);
7196 attrlist = NULL_TREE;
7198 decl = grokdeclarator (declarator, declspecs, NORMAL, initialized,
7201 if (decl == NULL_TREE || TREE_CODE (decl) == VOID_TYPE)
7204 type = TREE_TYPE (decl);
7206 if (type == error_mark_node)
7209 context = DECL_CONTEXT (decl);
7211 if (initialized && context && TREE_CODE (context) == NAMESPACE_DECL
7212 && context != current_namespace && TREE_CODE (decl) == VAR_DECL)
7214 /* When parsing the initializer, lookup should use the object's
7216 push_decl_namespace (context);
7219 /* We are only interested in class contexts, later. */
7220 if (context && TREE_CODE (context) == NAMESPACE_DECL)
7221 context = NULL_TREE;
7224 /* Is it valid for this decl to have an initializer at all?
7225 If not, set INITIALIZED to zero, which will indirectly
7226 tell `cp_finish_decl' to ignore the initializer once it is parsed. */
7227 switch (TREE_CODE (decl))
7230 /* typedef foo = bar means give foo the same type as bar.
7231 We haven't parsed bar yet, so `cp_finish_decl' will fix that up.
7232 Any other case of an initialization in a TYPE_DECL is an error. */
7233 if (pedantic || list_length (declspecs) > 1)
7235 cp_error ("typedef `%D' is initialized", decl);
7241 cp_error ("function `%#D' is initialized like a variable", decl);
7251 if (! toplevel_bindings_p ()
7252 && DECL_EXTERNAL (decl))
7253 cp_warning ("declaration of `%#D' has `extern' and is initialized",
7255 DECL_EXTERNAL (decl) = 0;
7256 if (toplevel_bindings_p ())
7257 TREE_STATIC (decl) = 1;
7259 /* Tell `pushdecl' this is an initialized decl
7260 even though we don't yet have the initializer expression.
7261 Also tell `cp_finish_decl' it may store the real initializer. */
7262 DECL_INITIAL (decl) = error_mark_node;
7265 #ifdef SET_DEFAULT_DECL_ATTRIBUTES
7266 SET_DEFAULT_DECL_ATTRIBUTES (decl, attributes);
7269 /* Set attributes here so if duplicate decl, will have proper attributes. */
7270 cplus_decl_attributes (decl, attributes, prefix_attributes);
7272 if (context && COMPLETE_TYPE_P (complete_type (context)))
7274 push_nested_class (context, 2);
7276 if (TREE_CODE (decl) == VAR_DECL)
7278 tree field = lookup_field (context, DECL_NAME (decl), 0, 0);
7279 if (field == NULL_TREE || TREE_CODE (field) != VAR_DECL)
7280 cp_error ("`%#D' is not a static member of `%#T'", decl, context);
7283 if (DECL_CONTEXT (field) != context)
7285 cp_pedwarn ("ISO C++ does not permit `%T::%D' to be defined as `%T::%D'",
7286 DECL_CONTEXT (field), DECL_NAME (decl),
7287 context, DECL_NAME (decl));
7288 DECL_CONTEXT (decl) = DECL_CONTEXT (field);
7290 /* Static data member are tricky; an in-class initialization
7291 still doesn't provide a definition, so the in-class
7292 declaration will have DECL_EXTERNAL set, but will have an
7293 initialization. Thus, duplicate_decls won't warn
7294 about this situation, and so we check here. */
7295 if (DECL_INITIAL (decl) && DECL_INITIAL (field))
7296 cp_error ("duplicate initialization of %D", decl);
7297 if (duplicate_decls (decl, field))
7303 tree field = check_classfn (context, decl);
7304 if (field && duplicate_decls (decl, field))
7308 /* cp_finish_decl sets DECL_EXTERNAL if DECL_IN_AGGR_P is set. */
7309 DECL_IN_AGGR_P (decl) = 0;
7310 if ((DECL_LANG_SPECIFIC (decl) && DECL_USE_TEMPLATE (decl))
7311 || CLASSTYPE_TEMPLATE_INSTANTIATION (context))
7313 SET_DECL_TEMPLATE_SPECIALIZATION (decl);
7314 /* [temp.expl.spec] An explicit specialization of a static data
7315 member of a template is a definition if the declaration
7316 includes an initializer; otherwise, it is a declaration.
7318 We check for processing_specialization so this only applies
7319 to the new specialization syntax. */
7320 if (DECL_INITIAL (decl) == NULL_TREE && processing_specialization)
7321 DECL_EXTERNAL (decl) = 1;
7324 if (DECL_EXTERNAL (decl) && ! DECL_TEMPLATE_SPECIALIZATION (decl))
7325 cp_pedwarn ("declaration of `%#D' outside of class is not definition",
7329 /* Enter this declaration into the symbol table. */
7330 tem = maybe_push_decl (decl);
7332 if (processing_template_decl)
7333 tem = push_template_decl (tem);
7335 #if ! defined (ASM_OUTPUT_BSS) && ! defined (ASM_OUTPUT_ALIGNED_BSS)
7336 /* Tell the back-end to use or not use .common as appropriate. If we say
7337 -fconserve-space, we want this to save .data space, at the expense of
7338 wrong semantics. If we say -fno-conserve-space, we want this to
7339 produce errors about redefs; to do this we force variables into the
7341 DECL_COMMON (tem) = flag_conserve_space || ! TREE_PUBLIC (tem);
7344 if (! processing_template_decl)
7354 tree type = TREE_TYPE (decl);
7355 int initialized = (DECL_INITIAL (decl) != NULL_TREE);
7357 if (type == error_mark_node)
7360 /* If this type of object needs a cleanup, but we're not allowed to
7361 add any more objects with cleanups to the current scope, create a
7362 new binding level. */
7363 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type)
7364 && current_binding_level->more_cleanups_ok == 0)
7366 keep_next_level (2);
7369 add_scope_stmt (/*begin_p=*/1, /*partial_p=*/1);
7373 /* Is it valid for this decl to have an initializer at all?
7374 If not, set INITIALIZED to zero, which will indirectly
7375 tell `cp_finish_decl' to ignore the initializer once it is parsed. */
7377 /* Don't allow initializations for incomplete types except for
7378 arrays which might be completed by the initialization. */
7379 if (COMPLETE_TYPE_P (complete_type (type)))
7380 ; /* A complete type is ok. */
7381 else if (TREE_CODE (type) != ARRAY_TYPE)
7383 cp_error ("variable `%#D' has initializer but incomplete type",
7386 type = TREE_TYPE (decl) = error_mark_node;
7388 else if (!COMPLETE_TYPE_P (complete_type (TREE_TYPE (type))))
7390 if (DECL_LANG_SPECIFIC (decl) && DECL_TEMPLATE_INFO (decl))
7391 cp_error ("elements of array `%#D' have incomplete type", decl);
7392 /* else we already gave an error in start_decl. */
7398 && TREE_CODE (decl) != TYPE_DECL
7399 && TREE_CODE (decl) != TEMPLATE_DECL
7400 && type != error_mark_node
7401 && IS_AGGR_TYPE (type)
7402 && ! DECL_EXTERNAL (decl))
7404 if ((! processing_template_decl || ! uses_template_parms (type))
7405 && !COMPLETE_TYPE_P (complete_type (type)))
7407 cp_error ("aggregate `%#D' has incomplete type and cannot be initialized",
7409 /* Change the type so that assemble_variable will give
7410 DECL an rtl we can live with: (mem (const_int 0)). */
7411 type = TREE_TYPE (decl) = error_mark_node;
7415 /* If any base type in the hierarchy of TYPE needs a constructor,
7416 then we set initialized to 1. This way any nodes which are
7417 created for the purposes of initializing this aggregate
7418 will live as long as it does. This is necessary for global
7419 aggregates which do not have their initializers processed until
7420 the end of the file. */
7421 initialized = TYPE_NEEDS_CONSTRUCTING (type);
7426 DECL_INITIAL (decl) = NULL_TREE;
7429 /* Handle initialization of references.
7430 These three arguments are from `cp_finish_decl', and have the
7431 same meaning here that they do there.
7433 Quotes on semantics can be found in ARM 8.4.3. */
7436 grok_reference_init (decl, type, init)
7437 tree decl, type, init;
7441 if (init == NULL_TREE)
7443 if ((DECL_LANG_SPECIFIC (decl) == 0
7444 || DECL_IN_AGGR_P (decl) == 0)
7445 && ! DECL_THIS_EXTERN (decl))
7446 cp_error ("`%D' declared as reference but not initialized", decl);
7450 if (init == error_mark_node)
7453 if (TREE_CODE (init) == CONSTRUCTOR)
7455 cp_error ("ISO C++ forbids use of initializer list to initialize reference `%D'", decl);
7459 if (TREE_CODE (init) == TREE_LIST)
7460 init = build_compound_expr (init);
7462 if (TREE_CODE (TREE_TYPE (init)) == REFERENCE_TYPE)
7463 init = convert_from_reference (init);
7465 if (TREE_CODE (TREE_TYPE (type)) != ARRAY_TYPE
7466 && TREE_CODE (TREE_TYPE (init)) == ARRAY_TYPE)
7468 /* Note: default conversion is only called in very special cases. */
7469 init = default_conversion (init);
7472 /* Convert INIT to the reference type TYPE. This may involve the
7473 creation of a temporary, whose lifetime must be the same as that
7474 of the reference. If so, a DECL_STMT for the temporary will be
7475 added just after the DECL_STMT for DECL. That's why we don't set
7476 DECL_INITIAL for local references (instead assigning to them
7477 explicitly); we need to allow the temporary to be initialized
7479 tmp = convert_to_reference
7480 (type, init, CONV_IMPLICIT,
7481 LOOKUP_ONLYCONVERTING|LOOKUP_SPECULATIVELY|LOOKUP_NORMAL|DIRECT_BIND,
7484 if (tmp == error_mark_node)
7486 else if (tmp != NULL_TREE)
7489 tmp = save_expr (tmp);
7490 if (building_stmt_tree ())
7492 /* Initialize the declaration. */
7493 tmp = build (INIT_EXPR, TREE_TYPE (decl), decl, tmp);
7494 finish_expr_stmt (tmp);
7497 DECL_INITIAL (decl) = tmp;
7501 cp_error ("cannot initialize `%T' from `%T'", type, TREE_TYPE (init));
7505 if (TREE_STATIC (decl) && ! TREE_CONSTANT (DECL_INITIAL (decl)))
7507 expand_static_init (decl, DECL_INITIAL (decl));
7508 DECL_INITIAL (decl) = NULL_TREE;
7513 /* Fill in DECL_INITIAL with some magical value to prevent expand_decl from
7514 mucking with forces it does not comprehend (i.e. initialization with a
7515 constructor). If we are at global scope and won't go into COMMON, fill
7516 it in with a dummy CONSTRUCTOR to force the variable into .data;
7517 otherwise we can use error_mark_node. */
7520 obscure_complex_init (decl, init)
7523 if (! flag_no_inline && TREE_STATIC (decl))
7525 if (extract_init (decl, init))
7529 #if ! defined (ASM_OUTPUT_BSS) && ! defined (ASM_OUTPUT_ALIGNED_BSS)
7530 if (toplevel_bindings_p () && ! DECL_COMMON (decl))
7531 DECL_INITIAL (decl) = build (CONSTRUCTOR, TREE_TYPE (decl), NULL_TREE,
7535 DECL_INITIAL (decl) = error_mark_node;
7540 /* When parsing `int a[] = {1, 2};' we don't know the size of the
7541 array until we finish parsing the initializer. If that's the
7542 situation we're in, update DECL accordingly. */
7545 maybe_deduce_size_from_array_init (decl, init)
7549 tree type = TREE_TYPE (decl);
7551 if (TREE_CODE (type) == ARRAY_TYPE
7552 && TYPE_DOMAIN (type) == NULL_TREE
7553 && TREE_CODE (decl) != TYPE_DECL)
7555 /* do_default is really a C-ism to deal with tentative definitions.
7556 But let's leave it here to ease the eventual merge. */
7557 int do_default = !DECL_EXTERNAL (decl);
7558 tree initializer = init ? init : DECL_INITIAL (decl);
7559 int failure = complete_array_type (type, initializer, do_default);
7562 cp_error ("initializer fails to determine size of `%D'", decl);
7567 cp_error ("array size missing in `%D'", decl);
7568 /* If a `static' var's size isn't known, make it extern as
7569 well as static, so it does not get allocated. If it's not
7570 `static', then don't mark it extern; finish_incomplete_decl
7571 will give it a default size and it will get allocated. */
7572 else if (!pedantic && TREE_STATIC (decl) && !TREE_PUBLIC (decl))
7573 DECL_EXTERNAL (decl) = 1;
7576 if (pedantic && TYPE_DOMAIN (type) != NULL_TREE
7577 && tree_int_cst_lt (TYPE_MAX_VALUE (TYPE_DOMAIN (type)),
7579 cp_error ("zero-size array `%D'", decl);
7581 layout_decl (decl, 0);
7585 /* Set DECL_SIZE, DECL_ALIGN, etc. for DECL (a VAR_DECL), and issue
7586 any appropriate error messages regarding the layout. */
7589 layout_var_decl (decl)
7592 tree type = TREE_TYPE (decl);
7594 tree ttype = target_type (type);
7597 /* If we haven't already layed out this declaration, do so now.
7598 Note that we must not call complete type for an external object
7599 because it's type might involve templates that we are not
7600 supposed to isntantiate yet. (And it's perfectly legal to say
7601 `extern X x' for some incomplete type `X'.) */
7602 if (!DECL_EXTERNAL (decl))
7603 complete_type (type);
7604 if (!DECL_SIZE (decl) && COMPLETE_TYPE_P (type))
7605 layout_decl (decl, 0);
7607 if (!DECL_EXTERNAL (decl) && DECL_SIZE (decl) == NULL_TREE)
7609 /* An automatic variable with an incomplete type: that is an error.
7610 Don't talk about array types here, since we took care of that
7611 message in grokdeclarator. */
7612 cp_error ("storage size of `%D' isn't known", decl);
7613 TREE_TYPE (decl) = error_mark_node;
7616 /* Keep this code around in case we later want to control debug info
7617 based on whether a type is "used". (jason 1999-11-11) */
7619 else if (!DECL_EXTERNAL (decl) && IS_AGGR_TYPE (ttype))
7620 /* Let debugger know it should output info for this type. */
7621 note_debug_info_needed (ttype);
7623 if (TREE_STATIC (decl) && DECL_CLASS_SCOPE_P (decl))
7624 note_debug_info_needed (DECL_CONTEXT (decl));
7627 if ((DECL_EXTERNAL (decl) || TREE_STATIC (decl))
7628 && DECL_SIZE (decl) != NULL_TREE
7629 && ! TREE_CONSTANT (DECL_SIZE (decl)))
7631 if (TREE_CODE (DECL_SIZE (decl)) == INTEGER_CST)
7632 constant_expression_warning (DECL_SIZE (decl));
7634 cp_error ("storage size of `%D' isn't constant", decl);
7638 /* If a local static variable is declared in an inline function, or if
7639 we have a weak definition, we must endeavor to create only one
7640 instance of the variable at link-time. */
7643 maybe_commonize_var (decl)
7646 /* Static data in a function with comdat linkage also has comdat
7648 if (TREE_STATIC (decl)
7649 /* Don't mess with __FUNCTION__. */
7650 && ! DECL_ARTIFICIAL (decl)
7651 && current_function_decl
7652 && DECL_CONTEXT (decl) == current_function_decl
7653 && (DECL_THIS_INLINE (current_function_decl)
7654 || DECL_TEMPLATE_INSTANTIATION (current_function_decl))
7655 && TREE_PUBLIC (current_function_decl))
7657 /* Rather than try to get this right with inlining, we suppress
7658 inlining of such functions. */
7659 current_function_cannot_inline
7660 = "function with static variable cannot be inline";
7662 /* If flag_weak, we don't need to mess with this, as we can just
7663 make the function weak, and let it refer to its unique local
7664 copy. This works because we don't allow the function to be
7668 if (DECL_INTERFACE_KNOWN (current_function_decl))
7670 TREE_PUBLIC (decl) = 1;
7671 DECL_EXTERNAL (decl) = DECL_EXTERNAL (current_function_decl);
7673 else if (DECL_INITIAL (decl) == NULL_TREE
7674 || DECL_INITIAL (decl) == error_mark_node)
7676 TREE_PUBLIC (decl) = 1;
7677 DECL_COMMON (decl) = 1;
7679 /* else we lose. We can only do this if we can use common,
7680 which we can't if it has been initialized. */
7682 if (TREE_PUBLIC (decl))
7683 DECL_ASSEMBLER_NAME (decl)
7684 = build_static_name (current_function_decl, DECL_NAME (decl));
7687 cp_warning_at ("sorry: semantics of inline function static data `%#D' are wrong (you'll wind up with multiple copies)", decl);
7688 cp_warning_at (" you can work around this by removing the initializer", decl);
7692 else if (DECL_LANG_SPECIFIC (decl) && DECL_COMDAT (decl))
7693 /* Set it up again; we might have set DECL_INITIAL since the last
7695 comdat_linkage (decl);
7698 /* Issue an error message if DECL is an uninitialized const variable. */
7701 check_for_uninitialized_const_var (decl)
7704 tree type = TREE_TYPE (decl);
7706 /* ``Unless explicitly declared extern, a const object does not have
7707 external linkage and must be initialized. ($8.4; $12.1)'' ARM
7709 if (TREE_CODE (decl) == VAR_DECL
7710 && TREE_CODE (type) != REFERENCE_TYPE
7711 && CP_TYPE_CONST_P (type)
7712 && !TYPE_NEEDS_CONSTRUCTING (type)
7713 && !DECL_INITIAL (decl))
7714 cp_error ("uninitialized const `%D'", decl);
7717 /* Verify INIT (the initializer for DECL), and record the
7718 initialization in DECL_INITIAL, if appropriate. Returns a new
7722 check_initializer (decl, init)
7728 if (TREE_CODE (decl) == FIELD_DECL)
7731 type = TREE_TYPE (decl);
7733 /* If `start_decl' didn't like having an initialization, ignore it now. */
7734 if (init != NULL_TREE && DECL_INITIAL (decl) == NULL_TREE)
7737 /* Check the initializer. */
7740 /* Things that are going to be initialized need to have complete
7742 TREE_TYPE (decl) = type = complete_type (TREE_TYPE (decl));
7744 if (type == error_mark_node)
7745 /* We will have already complained. */
7747 else if (COMPLETE_TYPE_P (type) && !TREE_CONSTANT (TYPE_SIZE (type)))
7749 cp_error ("variable-sized object `%D' may not be initialized", decl);
7752 else if (TREE_CODE (type) == ARRAY_TYPE
7753 && !COMPLETE_TYPE_P (TREE_TYPE (type)))
7755 cp_error ("elements of array `%#D' have incomplete type", decl);
7758 else if (!COMPLETE_TYPE_P (type))
7760 cp_error ("`%D' has incomplete type", decl);
7761 TREE_TYPE (decl) = error_mark_node;
7766 if (TREE_CODE (decl) == CONST_DECL)
7768 my_friendly_assert (TREE_CODE (decl) != REFERENCE_TYPE, 148);
7770 DECL_INITIAL (decl) = init;
7772 /* This will keep us from needing to worry about our obstacks. */
7773 my_friendly_assert (init != NULL_TREE, 149);
7776 else if (!DECL_EXTERNAL (decl) && TREE_CODE (type) == REFERENCE_TYPE)
7778 if (TREE_STATIC (decl))
7779 make_decl_rtl (decl, NULL_PTR, toplevel_bindings_p ());
7780 grok_reference_init (decl, type, init);
7785 if (TYPE_HAS_CONSTRUCTOR (type) || TYPE_NEEDS_CONSTRUCTING (type))
7787 if (TREE_CODE (type) == ARRAY_TYPE)
7788 init = digest_init (type, init, (tree *) 0);
7789 else if (TREE_CODE (init) == CONSTRUCTOR
7790 && TREE_HAS_CONSTRUCTOR (init))
7792 if (TYPE_NON_AGGREGATE_CLASS (type))
7794 cp_error ("`%D' must be initialized by constructor, not by `{...}'",
7796 init = error_mark_node;
7799 goto dont_use_constructor;
7804 dont_use_constructor:
7805 if (TREE_CODE (init) != TREE_VEC)
7806 init = store_init_value (decl, init);
7810 /* We must hide the initializer so that expand_decl
7811 won't try to do something it does not understand. */
7812 init = obscure_complex_init (decl, init);
7814 else if (DECL_EXTERNAL (decl))
7816 else if (TYPE_P (type)
7817 && (IS_AGGR_TYPE (type) || TYPE_NEEDS_CONSTRUCTING (type)))
7819 tree core_type = strip_array_types (type);
7821 if (! TYPE_NEEDS_CONSTRUCTING (core_type))
7823 if (CLASSTYPE_READONLY_FIELDS_NEED_INIT (core_type))
7824 cp_error ("structure `%D' with uninitialized const members", decl);
7825 if (CLASSTYPE_REF_FIELDS_NEED_INIT (core_type))
7826 cp_error ("structure `%D' with uninitialized reference members",
7830 check_for_uninitialized_const_var (decl);
7832 if (COMPLETE_TYPE_P (type) && TYPE_NEEDS_CONSTRUCTING (type))
7833 init = obscure_complex_init (decl, NULL_TREE);
7837 check_for_uninitialized_const_var (decl);
7842 /* If DECL is not a local variable, give it RTL. */
7845 make_rtl_for_nonlocal_decl (decl, init, asmspec)
7848 const char *asmspec;
7850 int toplev = toplevel_bindings_p ();
7853 /* Handle non-variables up front. */
7854 if (TREE_CODE (decl) != VAR_DECL)
7856 rest_of_decl_compilation (decl, asmspec, toplev, at_eof);
7860 /* If we see a class member here, it should be a static data
7862 if (DECL_LANG_SPECIFIC (decl) && DECL_IN_AGGR_P (decl))
7864 my_friendly_assert (TREE_STATIC (decl), 19990828);
7865 /* An in-class declaration of a static data member should be
7866 external; it is only a declaration, and not a definition. */
7867 if (init == NULL_TREE)
7868 my_friendly_assert (DECL_EXTERNAL (decl), 20000723);
7871 /* Set the DECL_ASSEMBLER_NAME for the variable. */
7873 DECL_ASSEMBLER_NAME (decl) = get_identifier (asmspec);
7875 /* We don't create any RTL for local variables. */
7876 if (DECL_FUNCTION_SCOPE_P (decl) && !TREE_STATIC (decl))
7879 /* We defer emission of local statics until the corresponding
7880 DECL_STMT is expanded. */
7881 defer_p = DECL_FUNCTION_SCOPE_P (decl) || DECL_VIRTUAL_P (decl);
7883 /* We try to defer namespace-scope static constants so that they are
7884 not emitted into the object file unncessarily. */
7885 if (!DECL_VIRTUAL_P (decl)
7886 && TREE_READONLY (decl)
7887 && DECL_INITIAL (decl) != NULL_TREE
7888 && DECL_INITIAL (decl) != error_mark_node
7889 && ! EMPTY_CONSTRUCTOR_P (DECL_INITIAL (decl))
7891 && !TREE_PUBLIC (decl))
7893 /* Fool with the linkage according to #pragma interface. */
7894 if (!interface_unknown)
7896 TREE_PUBLIC (decl) = 1;
7897 DECL_EXTERNAL (decl) = interface_only;
7903 /* If we're deferring the variable, just make RTL. Do not actually
7904 emit the variable. */
7906 make_decl_rtl (decl, asmspec, toplev);
7907 /* If we're not deferring, go ahead and assemble the variable. */
7909 rest_of_decl_compilation (decl, asmspec, toplev, at_eof);
7912 /* The old ARM scoping rules injected variables declared in the
7913 initialization statement of a for-statement into the surrounding
7914 scope. We support this usage, in order to be backward-compatible.
7915 DECL is a just-declared VAR_DECL; if necessary inject its
7916 declaration into the surrounding scope. */
7919 maybe_inject_for_scope_var (decl)
7922 if (!DECL_NAME (decl))
7925 if (current_binding_level->is_for_scope)
7927 struct binding_level *outer
7928 = current_binding_level->level_chain;
7930 /* Check to see if the same name is already bound at the outer
7931 level, either because it was directly declared, or because a
7932 dead for-decl got preserved. In either case, the code would
7933 not have been valid under the ARM scope rules, so clear
7934 is_for_scope for the current_binding_level.
7936 Otherwise, we need to preserve the temp slot for decl to last
7937 into the outer binding level. */
7940 = TREE_CHAIN (IDENTIFIER_BINDING (DECL_NAME (decl)));
7942 if (outer_binding && BINDING_LEVEL (outer_binding) == outer
7943 && (TREE_CODE (BINDING_VALUE (outer_binding))
7945 && DECL_DEAD_FOR_LOCAL (BINDING_VALUE (outer_binding)))
7947 BINDING_VALUE (outer_binding)
7948 = DECL_SHADOWED_FOR_VAR (BINDING_VALUE (outer_binding));
7949 current_binding_level->is_for_scope = 0;
7951 else if (DECL_IN_MEMORY_P (decl))
7952 preserve_temp_slots (DECL_RTL (decl));
7956 /* Generate code to initialize DECL (a local variable). */
7959 initialize_local_var (decl, init, flags)
7964 tree type = TREE_TYPE (decl);
7966 /* If the type is bogus, don't bother initializing the variable. */
7967 if (type == error_mark_node)
7970 if (DECL_SIZE (decl) == NULL_TREE && !TREE_STATIC (decl))
7972 /* If we used it already as memory, it must stay in memory. */
7973 DECL_INITIAL (decl) = NULL_TREE;
7974 TREE_ADDRESSABLE (decl) = TREE_USED (decl);
7977 /* Local statics are handled differently from ordinary automatic
7979 if (TREE_STATIC (decl))
7981 if (TYPE_NEEDS_CONSTRUCTING (type) || init != NULL_TREE
7982 || TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type))
7983 expand_static_init (decl, init);
7987 if (DECL_SIZE (decl) && type != error_mark_node)
7991 /* Compute and store the initial value. */
7992 already_used = TREE_USED (decl) || TREE_USED (type);
7994 if (init || TYPE_NEEDS_CONSTRUCTING (type))
7996 int saved_stmts_are_full_exprs_p;
7998 my_friendly_assert (building_stmt_tree (), 20000906);
7999 saved_stmts_are_full_exprs_p = stmts_are_full_exprs_p ();
8000 current_stmt_tree ()->stmts_are_full_exprs_p = 1;
8001 finish_expr_stmt (build_aggr_init (decl, init, flags));
8002 current_stmt_tree ()->stmts_are_full_exprs_p =
8003 saved_stmts_are_full_exprs_p;
8006 /* Set this to 0 so we can tell whether an aggregate which was
8007 initialized was ever used. Don't do this if it has a
8008 destructor, so we don't complain about the 'resource
8009 allocation is initialization' idiom. Now set
8010 attribute((unused)) on types so decls of that type will be
8011 marked used. (see TREE_USED, above.) */
8012 if (TYPE_NEEDS_CONSTRUCTING (type)
8014 && TYPE_HAS_TRIVIAL_DESTRUCTOR (type)
8015 && DECL_NAME (decl))
8016 TREE_USED (decl) = 0;
8017 else if (already_used)
8018 TREE_USED (decl) = 1;
8022 /* Generate code to destroy DECL (a local variable). */
8025 destroy_local_var (decl)
8028 tree type = TREE_TYPE (decl);
8031 /* Only variables get cleaned up. */
8032 if (TREE_CODE (decl) != VAR_DECL)
8035 /* And only things with destructors need cleaning up. */
8036 if (type == error_mark_node
8037 || TYPE_HAS_TRIVIAL_DESTRUCTOR (type))
8040 if (TREE_CODE (decl) == VAR_DECL &&
8041 (DECL_EXTERNAL (decl) || TREE_STATIC (decl)))
8042 /* We don't clean up things that aren't defined in this
8043 translation unit, or that need a static cleanup. The latter
8044 are handled by finish_file. */
8047 /* Compute the cleanup. */
8048 cleanup = maybe_build_cleanup (decl);
8050 /* Record the cleanup required for this declaration. */
8051 if (DECL_SIZE (decl) && TREE_TYPE (decl) != error_mark_node
8053 finish_decl_cleanup (decl, cleanup);
8056 /* Finish processing of a declaration;
8057 install its line number and initial value.
8058 If the length of an array type is not known before,
8059 it must be determined now, from the initial value, or it is an error.
8061 INIT holds the value of an initializer that should be allowed to escape
8064 FLAGS is LOOKUP_ONLYCONVERTING if the = init syntax was used, else 0
8065 if the (init) syntax was used. */
8068 cp_finish_decl (decl, init, asmspec_tree, flags)
8074 tree ttype = NULL_TREE;
8075 const char *asmspec = NULL;
8076 int was_readonly = 0;
8081 error ("assignment (not initialization) in declaration");
8085 /* If a name was specified, get the string. */
8087 asmspec = TREE_STRING_POINTER (asmspec_tree);
8089 if (init && TREE_CODE (init) == NAMESPACE_DECL)
8091 cp_error ("cannot initialize `%D' to namespace `%D'",
8096 if (current_class_type
8097 && CP_DECL_CONTEXT (decl) == current_class_type
8098 && TYPE_BEING_DEFINED (current_class_type)
8099 && (DECL_INITIAL (decl) || init))
8100 DECL_DEFINED_IN_CLASS_P (decl) = 1;
8102 if (TREE_CODE (decl) == VAR_DECL
8103 && DECL_CONTEXT (decl)
8104 && TREE_CODE (DECL_CONTEXT (decl)) == NAMESPACE_DECL
8105 && DECL_CONTEXT (decl) != current_namespace
8108 /* Leave the namespace of the object. */
8109 pop_decl_namespace ();
8112 type = TREE_TYPE (decl);
8114 if (type == error_mark_node)
8117 /* Add this declaration to the statement-tree. */
8118 if (building_stmt_tree ()
8119 && at_function_scope_p ()
8120 && TREE_CODE (decl) != RESULT_DECL)
8121 add_decl_stmt (decl);
8123 if (TYPE_HAS_MUTABLE_P (type))
8124 TREE_READONLY (decl) = 0;
8126 if (processing_template_decl)
8128 if (init && DECL_INITIAL (decl))
8129 DECL_INITIAL (decl) = init;
8133 /* Parameters are handled by store_parm_decls, not cp_finish_decl. */
8134 my_friendly_assert (TREE_CODE (decl) != PARM_DECL, 19990828);
8136 /* Take care of TYPE_DECLs up front. */
8137 if (TREE_CODE (decl) == TYPE_DECL)
8139 if (init && DECL_INITIAL (decl))
8141 /* typedef foo = bar; store the type of bar as the type of foo. */
8142 TREE_TYPE (decl) = type = TREE_TYPE (init);
8143 DECL_INITIAL (decl) = init = NULL_TREE;
8145 if (type != error_mark_node
8146 && IS_AGGR_TYPE (type) && DECL_NAME (decl))
8148 if (TREE_TYPE (DECL_NAME (decl)) && TREE_TYPE (decl) != type)
8149 cp_warning ("shadowing previous type declaration of `%#D'", decl);
8150 set_identifier_type_value (DECL_NAME (decl), type);
8151 CLASSTYPE_GOT_SEMICOLON (type) = 1;
8153 GNU_xref_decl (current_function_decl, decl);
8155 /* If we have installed this as the canonical typedef for this
8156 type, and that type has not been defined yet, delay emitting
8157 the debug information for it, as we will emit it later. */
8158 if (TYPE_MAIN_DECL (TREE_TYPE (decl)) == decl
8159 && !COMPLETE_TYPE_P (TREE_TYPE (decl)))
8160 TYPE_DECL_SUPPRESS_DEBUG (decl) = 1;
8162 rest_of_decl_compilation (decl, NULL_PTR,
8163 DECL_CONTEXT (decl) == NULL_TREE, at_eof);
8167 if (TREE_CODE (decl) != FUNCTION_DECL)
8168 ttype = target_type (type);
8170 if (! DECL_EXTERNAL (decl) && TREE_READONLY (decl)
8171 && TYPE_NEEDS_CONSTRUCTING (type))
8173 /* Currently, GNU C++ puts constants in text space, making them
8174 impossible to initialize. In the future, one would hope for
8175 an operating system which understood the difference between
8176 initialization and the running of a program. */
8178 TREE_READONLY (decl) = 0;
8181 if (TREE_CODE (decl) == FIELD_DECL && asmspec)
8183 /* This must override the asm specifier which was placed by
8184 grokclassfn. Lay this out fresh. */
8185 DECL_RTL (TREE_TYPE (decl)) = NULL_RTX;
8186 DECL_ASSEMBLER_NAME (decl) = get_identifier (asmspec);
8187 make_decl_rtl (decl, asmspec, 0);
8190 /* Deduce size of array from initialization, if not already known. */
8191 maybe_deduce_size_from_array_init (decl, init);
8192 init = check_initializer (decl, init);
8194 GNU_xref_decl (current_function_decl, decl);
8196 if (TREE_CODE (decl) == VAR_DECL)
8197 layout_var_decl (decl);
8199 /* Output the assembler code and/or RTL code for variables and functions,
8200 unless the type is an undefined structure or union.
8201 If not, it will get done when the type is completed. */
8202 if (TREE_CODE (decl) == VAR_DECL || TREE_CODE (decl) == FUNCTION_DECL
8203 || TREE_CODE (decl) == RESULT_DECL)
8205 if (TREE_CODE (decl) == VAR_DECL)
8206 maybe_commonize_var (decl);
8208 make_rtl_for_nonlocal_decl (decl, init, asmspec);
8210 if (TREE_CODE (type) == FUNCTION_TYPE
8211 || TREE_CODE (type) == METHOD_TYPE)
8212 abstract_virtuals_error (decl,
8213 strip_array_types (TREE_TYPE (type)));
8215 abstract_virtuals_error (decl, strip_array_types (type));
8217 if (TREE_CODE (decl) == FUNCTION_DECL)
8219 else if (DECL_EXTERNAL (decl)
8220 && ! (DECL_LANG_SPECIFIC (decl)
8221 && DECL_NOT_REALLY_EXTERN (decl)))
8224 DECL_INITIAL (decl) = init;
8226 else if (TREE_CODE (CP_DECL_CONTEXT (decl)) == FUNCTION_DECL)
8228 /* This is a local declaration. */
8229 if (doing_semantic_analysis_p ())
8230 maybe_inject_for_scope_var (decl);
8231 /* Initialize the local variable. But, if we're building a
8232 statement-tree, we'll do the initialization when we
8234 if (processing_template_decl)
8236 if (init || DECL_INITIAL (decl) == error_mark_node)
8237 DECL_INITIAL (decl) = init;
8241 /* If we're not building RTL, then we need to do so
8243 my_friendly_assert (building_stmt_tree (), 20000906);
8244 /* Initialize the variable. */
8245 initialize_local_var (decl, init, flags);
8246 /* Clean up the variable. */
8247 destroy_local_var (decl);
8250 else if (TREE_STATIC (decl) && type != error_mark_node)
8252 /* Cleanups for static variables are handled by `finish_file'. */
8253 if (TYPE_NEEDS_CONSTRUCTING (type) || init != NULL_TREE
8254 || TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type))
8255 expand_static_init (decl, init);
8259 /* Undo call to `pushclass' that was done in `start_decl'
8260 due to initialization of qualified member variable.
8261 I.e., Foo::x = 10; */
8263 tree context = CP_DECL_CONTEXT (decl);
8266 && (TREE_CODE (decl) == VAR_DECL
8267 /* We also have a pushclass done that we need to undo here
8268 if we're at top level and declare a method. */
8269 || TREE_CODE (decl) == FUNCTION_DECL)
8270 /* If size hasn't been set, we're still defining it,
8271 and therefore inside the class body; don't pop
8272 the binding level.. */
8273 && COMPLETE_TYPE_P (context)
8274 && context == current_class_type)
8275 pop_nested_class ();
8282 TREE_READONLY (decl) = 1;
8285 /* This is here for a midend callback from c-common.c */
8288 finish_decl (decl, init, asmspec_tree)
8292 cp_finish_decl (decl, init, asmspec_tree, 0);
8295 /* Returns a declaration for a VAR_DECL as if:
8297 extern "C" TYPE NAME;
8299 had been seen. Used to create compiler-generated global
8303 declare_global_var (name, type)
8309 push_to_top_level ();
8310 decl = build_decl (VAR_DECL, name, type);
8311 TREE_PUBLIC (decl) = 1;
8312 DECL_EXTERNAL (decl) = 1;
8313 DECL_ARTIFICIAL (decl) = 1;
8315 cp_finish_decl (decl, NULL_TREE, NULL_TREE, 0);
8316 pop_from_top_level ();
8321 /* Returns a pointer to the `atexit' function. Note that if
8322 FLAG_USE_CXA_ATEXIT is non-zero, then this will actually be the new
8323 `__cxa_atexit' function specified in the IA64 C++ ABI. */
8337 if (flag_use_cxa_atexit)
8339 /* The declaration for `__cxa_atexit' is:
8341 int __cxa_atexit (void (*)(void *), void *, void *)
8343 We build up the argument types and then then function type
8346 /* First, build the pointer-to-function type for the first
8348 arg_types = tree_cons (NULL_TREE, ptr_type_node, void_list_node);
8349 fn_type = build_function_type (void_type_node, arg_types);
8350 fn_ptr_type = build_pointer_type (fn_type);
8351 /* Then, build the rest of the argument types. */
8352 arg_types = tree_cons (NULL_TREE, ptr_type_node, void_list_node);
8353 arg_types = tree_cons (NULL_TREE, ptr_type_node, arg_types);
8354 arg_types = tree_cons (NULL_TREE, fn_ptr_type, arg_types);
8355 /* And the final __cxa_atexit type. */
8356 fn_type = build_function_type (integer_type_node, arg_types);
8357 fn_ptr_type = build_pointer_type (fn_type);
8358 name = "__cxa_atexit";
8362 /* The declaration for `atexit' is:
8364 int atexit (void (*)());
8366 We build up the argument types and then then function type
8368 fn_type = build_function_type (void_type_node, void_list_node);
8369 fn_ptr_type = build_pointer_type (fn_type);
8370 arg_types = tree_cons (NULL_TREE, fn_ptr_type, void_list_node);
8371 /* Build the final atexit type. */
8372 fn_type = build_function_type (integer_type_node, arg_types);
8376 /* Now, build the function declaration. */
8377 push_lang_context (lang_name_c);
8378 atexit_fndecl = build_library_fn_ptr (name, fn_type);
8379 mark_used (atexit_fndecl);
8380 pop_lang_context ();
8381 atexit_node = default_conversion (atexit_fndecl);
8386 /* Returns the __dso_handle VAR_DECL. */
8389 get_dso_handle_node ()
8391 if (dso_handle_node)
8392 return dso_handle_node;
8394 /* Declare the variable. */
8395 dso_handle_node = declare_global_var (get_identifier ("__dso_handle"),
8398 return dso_handle_node;
8401 /* Begin a new function with internal linkage whose job will be simply
8402 to destroy some particular variable. */
8407 static int counter = 0;
8408 int old_interface_unknown = interface_unknown;
8414 push_to_top_level ();
8416 /* No need to mangle this. */
8417 push_lang_context (lang_name_c);
8419 interface_unknown = 1;
8421 /* Build the parameter-types. */
8422 parmtypes = void_list_node;
8423 /* Functions passed to __cxa_atexit take an additional parameter.
8424 We'll just ignore it. After we implement the new calling
8425 convention for destructors, we can eliminate the use of
8426 additional cleanup functions entirely in the -fnew-abi case. */
8427 if (flag_use_cxa_atexit)
8428 parmtypes = tree_cons (NULL_TREE, ptr_type_node, parmtypes);
8429 /* Build the function type itself. */
8430 fntype = build_function_type (void_type_node, parmtypes);
8431 /* Build the name of the function. */
8432 sprintf (name, "__tcf_%d", counter++);
8433 /* Build the function declaration. */
8434 fndecl = build_lang_decl (FUNCTION_DECL, get_identifier (name), fntype);
8435 /* It's a function with internal linkage, generated by the
8437 TREE_PUBLIC (fndecl) = 0;
8438 DECL_ARTIFICIAL (fndecl) = 1;
8439 /* Make the function `inline' so that it is only emitted if it is
8440 actually needed. It is unlikely that it will be inlined, since
8441 it is only called via a function pointer, but we avoid unncessary
8442 emissions this way. */
8443 DECL_INLINE (fndecl) = 1;
8444 /* Build the parameter. */
8445 if (flag_use_cxa_atexit)
8449 parmdecl = build_decl (PARM_DECL, NULL_TREE, ptr_type_node);
8450 DECL_CONTEXT (parmdecl) = fndecl;
8451 DECL_ARG_TYPE (parmdecl) = ptr_type_node;
8452 TREE_USED (parmdecl) = 1;
8453 DECL_ARGUMENTS (fndecl) = parmdecl;
8457 start_function (/*specs=*/NULL_TREE, fndecl, NULL_TREE, SF_PRE_PARSED);
8460 interface_unknown = old_interface_unknown;
8462 pop_lang_context ();
8464 return current_function_decl;
8467 /* Finish the cleanup function begun by start_cleanup_fn. */
8474 expand_body (finish_function (0));
8476 pop_from_top_level ();
8479 /* Generate code to handle the destruction of DECL, an object with
8480 static storage duration. */
8483 register_dtor_fn (decl)
8491 int saved_flag_access_control;
8493 if (TYPE_HAS_TRIVIAL_DESTRUCTOR (TREE_TYPE (decl)))
8496 /* Call build_cleanup before we enter the anonymous function so that
8497 any access checks will be done relative to the current scope,
8498 rather than the scope of the anonymous function. */
8499 build_cleanup (decl);
8501 /* Now start the function. */
8502 cleanup = start_cleanup_fn ();
8504 /* Now, recompute the cleanup. It may contain SAVE_EXPRs that refer
8505 to the original function, rather than the anonymous one. That
8506 will make the back-end think that nested functions are in use,
8507 which causes confusion. */
8508 saved_flag_access_control = flag_access_control;
8509 flag_access_control = 0;
8510 fcall = build_cleanup (decl);
8511 flag_access_control = saved_flag_access_control;
8513 /* Create the body of the anonymous function. */
8514 compound_stmt = begin_compound_stmt (/*has_no_scope=*/0);
8515 finish_expr_stmt (fcall);
8516 finish_compound_stmt (/*has_no_scope=*/0, compound_stmt);
8519 /* Call atexit with the cleanup function. */
8520 mark_addressable (cleanup);
8521 cleanup = build_unary_op (ADDR_EXPR, cleanup, 0);
8522 if (flag_use_cxa_atexit)
8524 args = tree_cons (NULL_TREE, get_dso_handle_node (), NULL_TREE);
8525 args = tree_cons (NULL_TREE, null_pointer_node, args);
8526 args = tree_cons (NULL_TREE, cleanup, args);
8529 args = tree_cons (NULL_TREE, cleanup, NULL_TREE);
8530 finish_expr_stmt (build_function_call (get_atexit_node (), args));
8534 expand_static_init (decl, init)
8538 tree oldstatic = value_member (decl, static_aggregates);
8542 if (TREE_PURPOSE (oldstatic) && init != NULL_TREE)
8543 cp_error ("multiple initializations given for `%D'", decl);
8545 else if (! toplevel_bindings_p ())
8547 /* Emit code to perform this initialization but once. */
8554 /* Emit code to perform this initialization but once. This code
8557 static int guard = 0;
8559 // Do initialization.
8561 // Register variable for destruction at end of program.
8564 Note that the `temp' variable is only set to 1 *after* the
8565 initialization is complete. This ensures that an exception,
8566 thrown during the construction, will cause the variable to
8567 reinitialized when we pass through this code again, as per:
8571 If the initialization exits by throwing an exception, the
8572 initialization is not complete, so it will be tried again
8573 the next time control enters the declaration.
8575 In theory, this process should be thread-safe, too; multiple
8576 threads should not be able to initialize the variable more
8577 than once. We don't yet attempt to ensure thread-safety. */
8579 /* Create the guard variable. */
8580 guard = get_guard (decl);
8582 /* Begin the conditional initialization. */
8583 if_stmt = begin_if_stmt ();
8584 finish_if_stmt_cond (get_guard_cond (guard), if_stmt);
8585 then_clause = begin_compound_stmt (/*has_no_scope=*/0);
8587 /* Do the initialization itself. */
8588 if (TYPE_NEEDS_CONSTRUCTING (TREE_TYPE (decl))
8589 || (init && TREE_CODE (init) == TREE_LIST))
8590 assignment = build_aggr_init (decl, init, 0);
8592 /* The initialization we're doing here is just a bitwise
8594 assignment = build (INIT_EXPR, TREE_TYPE (decl), decl, init);
8596 assignment = NULL_TREE;
8598 /* Once the assignment is complete, set TEMP to 1. Since the
8599 construction of the static object is complete at this point,
8600 we want to make sure TEMP is set to 1 even if a temporary
8601 constructed during the initialization throws an exception
8602 when it is destroyed. So, we combine the initialization and
8603 the assignment to TEMP into a single expression, ensuring
8604 that when we call finish_expr_stmt the cleanups will not be
8605 run until after TEMP is set to 1. */
8606 guard_init = set_guard (guard);
8609 assignment = tree_cons (NULL_TREE, assignment,
8610 build_tree_list (NULL_TREE,
8612 assignment = build_compound_expr (assignment);
8615 assignment = guard_init;
8616 finish_expr_stmt (assignment);
8618 /* Use atexit to register a function for destroying this static
8620 register_dtor_fn (decl);
8622 finish_compound_stmt (/*has_no_scope=*/0, then_clause);
8623 finish_then_clause (if_stmt);
8627 static_aggregates = tree_cons (init, decl, static_aggregates);
8630 /* Finish the declaration of a catch-parameter. */
8633 start_handler_parms (declspecs, declarator)
8640 decl = grokdeclarator (declarator, declspecs, CATCHPARM,
8642 if (decl == NULL_TREE)
8643 error ("invalid catch parameter");
8652 /* Make TYPE a complete type based on INITIAL_VALUE.
8653 Return 0 if successful, 1 if INITIAL_VALUE can't be deciphered,
8654 2 if there was no information (in which case assume 0 if DO_DEFAULT). */
8657 complete_array_type (type, initial_value, do_default)
8658 tree type, initial_value;
8661 register tree maxindex = NULL_TREE;
8666 /* An array of character type can be initialized from a
8667 brace-enclosed string constant. */
8668 if (char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (type)))
8669 && TREE_CODE (initial_value) == CONSTRUCTOR
8670 && CONSTRUCTOR_ELTS (initial_value)
8671 && (TREE_CODE (TREE_VALUE (CONSTRUCTOR_ELTS (initial_value)))
8673 && TREE_CHAIN (CONSTRUCTOR_ELTS (initial_value)) == NULL_TREE)
8674 initial_value = TREE_VALUE (CONSTRUCTOR_ELTS (initial_value));
8676 /* Note MAXINDEX is really the maximum index, one less than the
8678 if (TREE_CODE (initial_value) == STRING_CST)
8681 = int_size_in_bytes (TREE_TYPE (TREE_TYPE (initial_value)));
8682 maxindex = build_int_2 ((TREE_STRING_LENGTH (initial_value)
8685 else if (TREE_CODE (initial_value) == CONSTRUCTOR)
8687 tree elts = CONSTRUCTOR_ELTS (initial_value);
8689 maxindex = ssize_int (-1);
8690 for (; elts; elts = TREE_CHAIN (elts))
8692 if (TREE_PURPOSE (elts))
8693 maxindex = TREE_PURPOSE (elts);
8695 maxindex = size_binop (PLUS_EXPR, maxindex, ssize_int (1));
8697 maxindex = copy_node (maxindex);
8701 /* Make an error message unless that happened already. */
8702 if (initial_value != error_mark_node)
8705 initial_value = NULL_TREE;
8707 /* Prevent further error messages. */
8708 maxindex = build_int_2 (0, 0);
8715 maxindex = build_int_2 (0, 0);
8724 domain = build_index_type (maxindex);
8725 TYPE_DOMAIN (type) = domain;
8727 if (! TREE_TYPE (maxindex))
8728 TREE_TYPE (maxindex) = domain;
8730 itype = TREE_TYPE (initial_value);
8733 if (itype && !TYPE_DOMAIN (itype))
8734 TYPE_DOMAIN (itype) = domain;
8735 /* The type of the main variant should never be used for arrays
8736 of different sizes. It should only ever be completed with the
8737 size of the array. */
8738 if (! TYPE_DOMAIN (TYPE_MAIN_VARIANT (type)))
8739 TYPE_DOMAIN (TYPE_MAIN_VARIANT (type)) = domain;
8742 /* Lay out the type now that we can get the real answer. */
8749 /* Return zero if something is declared to be a member of type
8750 CTYPE when in the context of CUR_TYPE. STRING is the error
8751 message to print in that case. Otherwise, quietly return 1. */
8754 member_function_or_else (ctype, cur_type, flags)
8755 tree ctype, cur_type;
8756 enum overload_flags flags;
8758 if (ctype && ctype != cur_type)
8760 if (flags == DTOR_FLAG)
8761 cp_error ("destructor for alien class `%T' cannot be a member",
8764 cp_error ("constructor for alien class `%T' cannot be a member",
8771 /* Subroutine of `grokdeclarator'. */
8773 /* Generate errors possibly applicable for a given set of specifiers.
8774 This is for ARM $7.1.2. */
8777 bad_specifiers (object, type, virtualp, quals, inlinep, friendp, raises)
8780 int virtualp, quals, friendp, raises, inlinep;
8783 cp_error ("`%D' declared as a `virtual' %s", object, type);
8785 cp_error ("`%D' declared as an `inline' %s", object, type);
8787 cp_error ("`const' and `volatile' function specifiers on `%D' invalid in %s declaration",
8790 cp_error_at ("`%D' declared as a friend", object);
8792 cp_error_at ("`%D' declared with an exception specification", object);
8795 /* CTYPE is class type, or null if non-class.
8796 TYPE is type this FUNCTION_DECL should have, either FUNCTION_TYPE
8798 DECLARATOR is the function's name.
8799 VIRTUALP is truthvalue of whether the function is virtual or not.
8800 FLAGS are to be passed through to `grokclassfn'.
8801 QUALS are qualifiers indicating whether the function is `const'
8803 RAISES is a list of exceptions that this function can raise.
8804 CHECK is 1 if we must find this method in CTYPE, 0 if we should
8805 not look, and -1 if we should not call `grokclassfn' at all.
8807 Returns `NULL_TREE' if something goes wrong, after issuing
8808 applicable error messages. */
8811 grokfndecl (ctype, type, declarator, orig_declarator, virtualp, flags, quals,
8812 raises, check, friendp, publicp, inlinep, funcdef_flag,
8813 template_count, in_namespace)
8816 tree orig_declarator;
8818 enum overload_flags flags;
8820 int check, friendp, publicp, inlinep, funcdef_flag, template_count;
8824 int staticp = ctype && TREE_CODE (type) == FUNCTION_TYPE;
8825 int has_default_arg = 0;
8829 cname = TREE_CODE (TYPE_NAME (ctype)) == TYPE_DECL
8830 ? TYPE_IDENTIFIER (ctype) : TYPE_NAME (ctype);
8836 type = build_exception_variant (type, raises);
8839 decl = build_lang_decl (FUNCTION_DECL, declarator, type);
8840 /* Propagate volatile out from type to decl. */
8841 if (TYPE_VOLATILE (type))
8842 TREE_THIS_VOLATILE (decl) = 1;
8844 /* If this decl has namespace scope, set that up. */
8846 set_decl_namespace (decl, in_namespace, friendp);
8848 DECL_CONTEXT (decl) = FROB_CONTEXT (current_namespace);
8850 /* `main' and builtins have implicit 'C' linkage. */
8851 if ((MAIN_NAME_P (declarator)
8852 || (IDENTIFIER_LENGTH (declarator) > 10
8853 && IDENTIFIER_POINTER (declarator)[0] == '_'
8854 && IDENTIFIER_POINTER (declarator)[1] == '_'
8855 && strncmp (IDENTIFIER_POINTER (declarator)+2, "builtin_", 8) == 0))
8856 && current_lang_name == lang_name_cplusplus
8857 && ctype == NULL_TREE
8858 /* NULL_TREE means global namespace. */
8859 && DECL_CONTEXT (decl) == NULL_TREE)
8860 DECL_LANGUAGE (decl) = lang_c;
8862 /* Should probably propagate const out from type to decl I bet (mrs). */
8865 DECL_STATIC_FUNCTION_P (decl) = 1;
8866 DECL_CONTEXT (decl) = ctype;
8870 DECL_CONTEXT (decl) = ctype;
8872 if (ctype == NULL_TREE && DECL_MAIN_P (decl))
8874 if (processing_template_decl)
8875 error ("cannot declare `::main' to be a template");
8877 error ("cannot declare `::main' to be inline");
8879 error ("cannot declare `::main' to be static");
8880 if (!same_type_p (TREE_TYPE (TREE_TYPE (decl)),
8882 error ("`main' must return `int'");
8887 /* Members of anonymous types and local classes have no linkage; make
8889 if (ctype && (ANON_AGGRNAME_P (TYPE_IDENTIFIER (ctype))
8890 || decl_function_context (TYPE_MAIN_DECL (ctype))))
8895 /* [basic.link]: A name with no linkage (notably, the name of a class
8896 or enumeration declared in a local scope) shall not be used to
8897 declare an entity with linkage.
8899 Only check this for public decls for now. */
8900 t = no_linkage_check (TREE_TYPE (decl));
8903 if (ANON_AGGRNAME_P (TYPE_IDENTIFIER (t)))
8905 if (DECL_EXTERN_C_P (decl))
8906 /* Allow this; it's pretty common in C. */;
8908 cp_pedwarn ("non-local function `%#D' uses anonymous type",
8912 cp_pedwarn ("non-local function `%#D' uses local type `%T'",
8917 TREE_PUBLIC (decl) = publicp;
8920 DECL_INTERFACE_KNOWN (decl) = 1;
8921 DECL_NOT_REALLY_EXTERN (decl) = 1;
8925 DECL_THIS_INLINE (decl) = DECL_INLINE (decl) = 1;
8927 DECL_EXTERNAL (decl) = 1;
8928 if (quals != NULL_TREE && TREE_CODE (type) == FUNCTION_TYPE)
8930 cp_error ("%smember function `%D' cannot have `%T' method qualifier",
8931 (ctype ? "static " : "non-"), decl, TREE_VALUE (quals));
8935 if (IDENTIFIER_OPNAME_P (DECL_NAME (decl)))
8936 grok_op_properties (decl, virtualp, check < 0);
8938 if (ctype && decl_function_context (decl))
8939 DECL_NO_STATIC_CHAIN (decl) = 1;
8941 for (t = TYPE_ARG_TYPES (TREE_TYPE (decl)); t; t = TREE_CHAIN (t))
8942 if (TREE_PURPOSE (t)
8943 && TREE_CODE (TREE_PURPOSE (t)) == DEFAULT_ARG)
8945 has_default_arg = 1;
8950 && TREE_CODE (orig_declarator) == TEMPLATE_ID_EXPR)
8954 ("defining explicit specialization `%D' in friend declaration",
8958 if (PROCESSING_REAL_TEMPLATE_DECL_P ())
8960 /* Something like `template <class T> friend void f<T>()'. */
8961 cp_error ("invalid use of template-id `%D' in declaration of primary template",
8967 /* A friend declaration of the form friend void f<>(). Record
8968 the information in the TEMPLATE_ID_EXPR. */
8969 SET_DECL_IMPLICIT_INSTANTIATION (decl);
8970 DECL_TEMPLATE_INFO (decl)
8971 = tree_cons (TREE_OPERAND (orig_declarator, 0),
8972 TREE_OPERAND (orig_declarator, 1),
8975 if (has_default_arg)
8977 cp_error ("default arguments are not allowed in declaration of friend template specialization `%D'",
8984 cp_error ("`inline' is not allowed in declaration of friend template specialization `%D'",
8991 if (has_default_arg)
8992 add_defarg_fn (decl);
8994 /* Plain overloading: will not be grok'd by grokclassfn. */
8995 if (! ctype && ! processing_template_decl
8996 && !DECL_EXTERN_C_P (decl)
8997 && (! DECL_USE_TEMPLATE (decl) || name_mangling_version < 1))
8998 set_mangled_name_for_decl (decl);
9001 /* Make the init_value nonzero so pushdecl knows this is not
9002 tentative. error_mark_node is replaced later with the BLOCK. */
9003 DECL_INITIAL (decl) = error_mark_node;
9005 if (TYPE_NOTHROW_P (type) || nothrow_libfn_p (decl))
9006 TREE_NOTHROW (decl) = 1;
9008 /* Caller will do the rest of this. */
9012 if (flags == NO_SPECIAL && ctype && constructor_name (cname) == declarator)
9013 DECL_CONSTRUCTOR_P (decl) = 1;
9015 /* Function gets the ugly name, field gets the nice one. This call
9016 may change the type of the function (because of default
9018 if (ctype != NULL_TREE)
9019 grokclassfn (ctype, decl, flags, quals);
9021 decl = check_explicit_specialization (orig_declarator, decl,
9023 2 * (funcdef_flag != 0) +
9024 4 * (friendp != 0));
9025 if (decl == error_mark_node)
9028 if (ctype != NULL_TREE
9029 && (! TYPE_FOR_JAVA (ctype) || check_java_method (decl))
9034 old_decl = check_classfn (ctype, decl);
9036 if (old_decl && TREE_CODE (old_decl) == TEMPLATE_DECL)
9037 /* Because grokfndecl is always supposed to return a
9038 FUNCTION_DECL, we pull out the DECL_TEMPLATE_RESULT
9039 here. We depend on our callers to figure out that its
9040 really a template that's being returned. */
9041 old_decl = DECL_TEMPLATE_RESULT (old_decl);
9043 if (old_decl && DECL_STATIC_FUNCTION_P (old_decl)
9044 && TREE_CODE (TREE_TYPE (decl)) == METHOD_TYPE)
9046 /* Remove the `this' parm added by grokclassfn.
9047 XXX Isn't this done in start_function, too? */
9048 revert_static_member_fn (decl);
9049 last_function_parms = TREE_CHAIN (last_function_parms);
9051 if (old_decl && DECL_ARTIFICIAL (old_decl))
9052 cp_error ("definition of implicitly-declared `%D'", old_decl);
9056 /* Since we've smashed OLD_DECL to its
9057 DECL_TEMPLATE_RESULT, we must do the same to DECL. */
9058 if (TREE_CODE (decl) == TEMPLATE_DECL)
9059 decl = DECL_TEMPLATE_RESULT (decl);
9061 /* Attempt to merge the declarations. This can fail, in
9062 the case of some illegal specialization declarations. */
9063 if (!duplicate_decls (decl, old_decl))
9064 cp_error ("no `%#D' member function declared in class `%T'",
9070 if (DECL_CONSTRUCTOR_P (decl) && !grok_ctor_properties (ctype, decl))
9073 if (ctype == NULL_TREE || check)
9078 DECL_VIRTUAL_P (decl) = 1;
9079 if (DECL_VINDEX (decl) == NULL_TREE)
9080 DECL_VINDEX (decl) = error_mark_node;
9081 IDENTIFIER_VIRTUAL_P (DECL_NAME (decl)) = 1;
9088 grokvardecl (type, declarator, specbits_in, initialized, constp, in_namespace)
9091 RID_BIT_TYPE *specbits_in;
9097 RID_BIT_TYPE specbits;
9099 specbits = *specbits_in;
9101 if (TREE_CODE (type) == OFFSET_TYPE)
9103 /* If you declare a static member so that it
9104 can be initialized, the code will reach here. */
9105 tree basetype = TYPE_OFFSET_BASETYPE (type);
9106 type = TREE_TYPE (type);
9107 decl = build_lang_decl (VAR_DECL, declarator, type);
9108 DECL_CONTEXT (decl) = basetype;
9109 /* DECL_ASSEMBLER_NAME is needed only for full-instantiated
9111 if (!uses_template_parms (decl))
9114 DECL_ASSEMBLER_NAME (decl) = mangle_decl (decl);
9116 DECL_ASSEMBLER_NAME (decl) = build_static_name (basetype,
9125 context = in_namespace;
9126 else if (namespace_bindings_p () || RIDBIT_SETP (RID_EXTERN, specbits))
9127 context = current_namespace;
9129 context = NULL_TREE;
9131 if (processing_template_decl && context)
9132 /* For global variables, declared in a template, we need the
9134 decl = build_lang_decl (VAR_DECL, declarator, type);
9136 decl = build_decl (VAR_DECL, declarator, type);
9139 set_decl_namespace (decl, context, 0);
9141 context = DECL_CONTEXT (decl);
9142 if (declarator && context && current_lang_name != lang_name_c)
9145 DECL_ASSEMBLER_NAME (decl) = mangle_decl (decl);
9147 DECL_ASSEMBLER_NAME (decl)
9148 = build_static_name (context, declarator);
9153 set_decl_namespace (decl, in_namespace, 0);
9155 if (RIDBIT_SETP (RID_EXTERN, specbits))
9157 DECL_THIS_EXTERN (decl) = 1;
9158 DECL_EXTERNAL (decl) = !initialized;
9161 /* In class context, static means one per class,
9162 public access, and static storage. */
9163 if (DECL_CLASS_SCOPE_P (decl))
9165 TREE_PUBLIC (decl) = 1;
9166 TREE_STATIC (decl) = 1;
9167 DECL_EXTERNAL (decl) = 0;
9169 /* At top level, either `static' or no s.c. makes a definition
9170 (perhaps tentative), and absence of `static' makes it public. */
9171 else if (toplevel_bindings_p ())
9173 TREE_PUBLIC (decl) = (RIDBIT_NOTSETP (RID_STATIC, specbits)
9174 && (DECL_THIS_EXTERN (decl) || ! constp));
9175 TREE_STATIC (decl) = ! DECL_EXTERNAL (decl);
9177 /* Not at top level, only `static' makes a static definition. */
9180 TREE_STATIC (decl) = !! RIDBIT_SETP (RID_STATIC, specbits);
9181 TREE_PUBLIC (decl) = DECL_EXTERNAL (decl);
9184 if (TREE_PUBLIC (decl))
9186 /* [basic.link]: A name with no linkage (notably, the name of a class
9187 or enumeration declared in a local scope) shall not be used to
9188 declare an entity with linkage.
9190 Only check this for public decls for now. */
9191 tree t = no_linkage_check (TREE_TYPE (decl));
9194 if (ANON_AGGRNAME_P (TYPE_IDENTIFIER (t)))
9195 /* Ignore for now; `enum { foo } e' is pretty common. */;
9197 cp_pedwarn ("non-local variable `%#D' uses local type `%T'",
9205 /* Create and return a canonical pointer to member function type, for
9206 TYPE, which is a POINTER_TYPE to a METHOD_TYPE. */
9209 build_ptrmemfunc_type (type)
9215 tree unqualified_variant = NULL_TREE;
9217 /* If a canonical type already exists for this type, use it. We use
9218 this method instead of type_hash_canon, because it only does a
9219 simple equality check on the list of field members. */
9221 if ((t = TYPE_GET_PTRMEMFUNC_TYPE (type)))
9224 /* Make sure that we always have the unqualified pointer-to-member
9226 if (CP_TYPE_QUALS (type) != TYPE_UNQUALIFIED)
9228 = build_ptrmemfunc_type (TYPE_MAIN_VARIANT (type));
9230 t = make_aggr_type (RECORD_TYPE);
9231 /* Let the front-end know this is a pointer to member function... */
9232 TYPE_PTRMEMFUNC_FLAG (t) = 1;
9233 /* ... and not really an aggregate. */
9234 SET_IS_AGGR_TYPE (t, 0);
9238 u = make_aggr_type (UNION_TYPE);
9239 SET_IS_AGGR_TYPE (u, 0);
9240 fields[0] = build_decl (FIELD_DECL, pfn_identifier, type);
9241 fields[1] = build_decl (FIELD_DECL, delta2_identifier,
9243 finish_builtin_type (u, "__ptrmemfunc_type", fields, 1, ptr_type_node);
9244 TYPE_NAME (u) = NULL_TREE;
9246 fields[0] = build_decl (FIELD_DECL, delta_identifier,
9248 fields[1] = build_decl (FIELD_DECL, index_identifier,
9250 fields[2] = build_decl (FIELD_DECL, pfn_or_delta2_identifier, u);
9251 finish_builtin_type (t, "__ptrmemfunc_type", fields, 2, ptr_type_node);
9255 fields[0] = build_decl (FIELD_DECL, pfn_identifier, type);
9256 fields[1] = build_decl (FIELD_DECL, delta_identifier,
9258 finish_builtin_type (t, "__ptrmemfunc_type", fields, 1, ptr_type_node);
9261 /* Zap out the name so that the back-end will give us the debugging
9262 information for this anonymous RECORD_TYPE. */
9263 TYPE_NAME (t) = NULL_TREE;
9265 /* If this is not the unqualified form of this pointer-to-member
9266 type, set the TYPE_MAIN_VARIANT for this type to be the
9267 unqualified type. Since they are actually RECORD_TYPEs that are
9268 not variants of each other, we must do this manually. */
9269 if (CP_TYPE_QUALS (type) != TYPE_UNQUALIFIED)
9271 t = build_qualified_type (t, CP_TYPE_QUALS (type));
9272 TYPE_MAIN_VARIANT (t) = unqualified_variant;
9273 TYPE_NEXT_VARIANT (t) = TYPE_NEXT_VARIANT (unqualified_variant);
9274 TYPE_NEXT_VARIANT (unqualified_variant) = t;
9277 /* Cache this pointer-to-member type so that we can find it again
9279 TYPE_SET_PTRMEMFUNC_TYPE (type, t);
9281 /* Seems to be wanted. */
9282 CLASSTYPE_GOT_SEMICOLON (t) = 1;
9287 /* DECL is a VAR_DECL defined in-class, whose TYPE is also given.
9288 Check to see that the definition is valid. Issue appropriate error
9289 messages. Return 1 if the definition is particularly bad, or 0
9293 check_static_variable_definition (decl, type)
9297 /* Motion 10 at San Diego: If a static const integral data member is
9298 initialized with an integral constant expression, the initializer
9299 may appear either in the declaration (within the class), or in
9300 the definition, but not both. If it appears in the class, the
9301 member is a member constant. The file-scope definition is always
9303 if (CLASS_TYPE_P (type) || TREE_CODE (type) == REFERENCE_TYPE)
9305 cp_error ("invalid in-class initialization of static data member of non-integral type `%T'",
9307 /* If we just return the declaration, crashes will sometimes
9308 occur. We therefore return void_type_node, as if this was a
9309 friend declaration, to cause callers to completely ignore
9310 this declaration. */
9313 else if (!CP_TYPE_CONST_P (type))
9314 cp_error ("ISO C++ forbids in-class initialization of non-const static member `%D'",
9316 else if (pedantic && !INTEGRAL_TYPE_P (type))
9317 cp_pedwarn ("ISO C++ forbids initialization of member constant `%D' of non-integral type `%T'", decl, type);
9322 /* Given the SIZE (i.e., number of elements) in an array, compute an
9323 appropriate index type for the array. If non-NULL, NAME is the
9324 name of the thing being declared. */
9327 compute_array_index_type (name, size)
9333 /* The size might be the result of a cast. */
9334 STRIP_TYPE_NOPS (size);
9336 /* It might be a const variable or enumeration constant. */
9337 size = decl_constant_value (size);
9339 /* If this involves a template parameter, it will be a constant at
9340 instantiation time, but we don't know what the value is yet.
9341 Even if no template parameters are involved, we may an expression
9342 that is not a constant; we don't even simplify `1 + 2' when
9343 processing a template. */
9344 if (processing_template_decl)
9346 /* Resolve a qualified reference to an enumerator or static
9347 const data member of ours. */
9348 if (TREE_CODE (size) == SCOPE_REF
9349 && TREE_OPERAND (size, 0) == current_class_type)
9351 tree t = lookup_field (current_class_type,
9352 TREE_OPERAND (size, 1), 0, 0);
9357 return build_index_type (build_min (MINUS_EXPR, sizetype,
9358 size, integer_one_node));
9361 /* The array bound must be an integer type. */
9362 if (TREE_CODE (TREE_TYPE (size)) != INTEGER_TYPE
9363 && TREE_CODE (TREE_TYPE (size)) != ENUMERAL_TYPE
9364 && TREE_CODE (TREE_TYPE (size)) != BOOLEAN_TYPE)
9367 cp_error ("size of array `%D' has non-integer type", name);
9369 cp_error ("size of array has non-integer type");
9370 size = integer_one_node;
9373 /* Normally, the array-bound will be a constant. */
9374 if (TREE_CODE (size) == INTEGER_CST)
9376 /* Check to see if the array bound overflowed. Make that an
9377 error, no matter how generous we're being. */
9378 int old_flag_pedantic_errors = flag_pedantic_errors;
9379 int old_pedantic = pedantic;
9380 pedantic = flag_pedantic_errors = 1;
9381 constant_expression_warning (size);
9382 pedantic = old_pedantic;
9383 flag_pedantic_errors = old_flag_pedantic_errors;
9385 /* An array must have a positive number of elements. */
9386 if (INT_CST_LT (size, integer_zero_node))
9389 cp_error ("size of array `%D' is negative", name);
9391 cp_error ("size of array is negative");
9392 size = integer_one_node;
9394 /* Except that an extension we allow zero-sized arrays. We
9395 always allow them in system headers because glibc uses
9397 else if (integer_zerop (size) && pedantic && !in_system_header)
9400 cp_pedwarn ("ISO C++ forbids zero-size array `%D'", name);
9402 cp_pedwarn ("ISO C++ forbids zero-size array");
9405 else if (TREE_CONSTANT (size))
9407 /* `(int) &fn' is not a valid array bound. */
9409 cp_error ("size of array `%D' is not an integral constant-expression",
9412 cp_error ("size of array is not an integral constant-expression");
9415 /* Compute the index of the largest element in the array. It is
9416 one less than the number of elements in the array. */
9418 = fold (cp_build_binary_op (MINUS_EXPR,
9419 cp_convert (ssizetype, size),
9420 cp_convert (ssizetype,
9421 integer_one_node)));
9423 /* Check for variable-sized arrays. We allow such things as an
9424 extension, even though they are not allowed in ANSI/ISO C++. */
9425 if (!TREE_CONSTANT (itype))
9430 cp_pedwarn ("ISO C++ forbids variable-size array `%D'",
9433 cp_pedwarn ("ISO C++ forbids variable-size array");
9436 /* Create a variable-sized array index type. */
9437 itype = variable_size (itype);
9439 /* Make sure that there was no overflow when creating to a signed
9440 index type. (For example, on a 32-bit machine, an array with
9441 size 2^32 - 1 is too big.) */
9442 else if (TREE_OVERFLOW (itype))
9444 error ("overflow in array dimension");
9445 TREE_OVERFLOW (itype) = 0;
9448 /* Create and return the appropriate index type. */
9449 return build_index_type (itype);
9452 /* Returns an ARRAY_TYPE for an array with SIZE elements of the
9453 indicated TYPE. If non-NULL, NAME is the NAME of the declaration
9457 create_array_type_for_decl (name, type, size)
9462 tree itype = NULL_TREE;
9463 const char* error_msg;
9465 /* If things have already gone awry, bail now. */
9466 if (type == error_mark_node || size == error_mark_node)
9467 return error_mark_node;
9469 /* Assume that everything will go OK. */
9472 /* There are some types which cannot be array elements. */
9473 switch (TREE_CODE (type))
9476 error_msg = "array of void";
9480 error_msg = "array of functions";
9483 case REFERENCE_TYPE:
9484 error_msg = "array of references";
9488 error_msg = "array of data members";
9492 error_msg = "array of function members";
9499 /* If something went wrong, issue an error-message and return. */
9503 cp_error ("declaration of `%D' as %s", name, error_msg);
9505 cp_error ("creating %s", error_msg);
9507 return error_mark_node;
9512 The constant expressions that specify the bounds of the arrays
9513 can be omitted only for the first member of the sequence. */
9514 if (TREE_CODE (type) == ARRAY_TYPE && !TYPE_DOMAIN (type))
9516 cp_error ("declaration of `%D' as multidimensional array must have bounds for all dimensions except the first",
9519 return error_mark_node;
9522 /* Figure out the index type for the array. */
9524 itype = compute_array_index_type (name, size);
9526 return build_cplus_array_type (type, itype);
9529 /* Check that it's OK to declare a function with the indicated TYPE.
9530 SFK indicates the kind of special function (if any) that this
9531 function is. CTYPE is the class of which this function is a
9532 member. OPTYPE is the type given in a conversion operator
9533 declaration. Returns the actual return type of the function; that
9534 may be different than TYPE if an error occurs, or for certain
9535 special functions. */
9538 check_special_function_return_type (sfk, type, ctype, optype)
9539 special_function_kind sfk;
9546 case sfk_constructor:
9548 cp_error ("return type specification for constructor invalid");
9550 /* In the old ABI, we return `this'; in the new ABI we don't
9552 type = flag_new_abi ? void_type_node : build_pointer_type (ctype);
9555 case sfk_destructor:
9557 cp_error ("return type specification for destructor invalid");
9558 type = void_type_node;
9561 case sfk_conversion:
9562 if (type && !same_type_p (type, optype))
9563 cp_error ("operator `%T' declared to return `%T'", optype, type);
9565 cp_pedwarn ("return type specified for `operator %T'", optype);
9570 my_friendly_abort (20000408);
9577 /* Given declspecs and a declarator,
9578 determine the name and type of the object declared
9579 and construct a ..._DECL node for it.
9580 (In one case we can return a ..._TYPE node instead.
9581 For invalid input we sometimes return 0.)
9583 DECLSPECS is a chain of tree_list nodes whose value fields
9584 are the storage classes and type specifiers.
9586 DECL_CONTEXT says which syntactic context this declaration is in:
9587 NORMAL for most contexts. Make a VAR_DECL or FUNCTION_DECL or TYPE_DECL.
9588 FUNCDEF for a function definition. Like NORMAL but a few different
9589 error messages in each case. Return value may be zero meaning
9590 this definition is too screwy to try to parse.
9591 MEMFUNCDEF for a function definition. Like FUNCDEF but prepares to
9592 handle member functions (which have FIELD context).
9593 Return value may be zero meaning this definition is too screwy to
9595 PARM for a parameter declaration (either within a function prototype
9596 or before a function body). Make a PARM_DECL, or return void_type_node.
9597 CATCHPARM for a parameter declaration before a catch clause.
9598 TYPENAME if for a typename (in a cast or sizeof).
9599 Don't make a DECL node; just return the ..._TYPE node.
9600 FIELD for a struct or union field; make a FIELD_DECL.
9601 BITFIELD for a field with specified width.
9602 INITIALIZED is 1 if the decl has an initializer.
9604 ATTRLIST is a TREE_LIST node with prefix attributes in TREE_VALUE and
9605 normal attributes in TREE_PURPOSE, or NULL_TREE.
9607 In the TYPENAME case, DECLARATOR is really an abstract declarator.
9608 It may also be so in the PARM case, for a prototype where the
9609 argument type is specified but not the name.
9611 This function is where the complicated C meanings of `static'
9612 and `extern' are interpreted.
9614 For C++, if there is any monkey business to do, the function which
9615 calls this one must do it, i.e., prepending instance variables,
9616 renaming overloaded function names, etc.
9618 Note that for this C++, it is an error to define a method within a class
9619 which does not belong to that class.
9621 Except in the case where SCOPE_REFs are implicitly known (such as
9622 methods within a class being redundantly qualified),
9623 declarations which involve SCOPE_REFs are returned as SCOPE_REFs
9624 (class_name::decl_name). The caller must also deal with this.
9626 If a constructor or destructor is seen, and the context is FIELD,
9627 then the type gains the attribute TREE_HAS_x. If such a declaration
9628 is erroneous, NULL_TREE is returned.
9630 QUALS is used only for FUNCDEF and MEMFUNCDEF cases. For a member
9631 function, these are the qualifiers to give to the `this' pointer. We
9632 apply TYPE_QUAL_RESTRICT to the this ptr, not the object.
9634 May return void_type_node if the declarator turned out to be a friend.
9635 See grokfield for details. */
9638 grokdeclarator (declarator, declspecs, decl_context, initialized, attrlist)
9641 enum decl_context decl_context;
9645 RID_BIT_TYPE specbits;
9648 tree type = NULL_TREE;
9654 int virtualp, explicitp, friendp, inlinep, staticp;
9655 int explicit_int = 0;
9656 int explicit_char = 0;
9657 int defaulted_int = 0;
9658 tree typedef_decl = NULL_TREE;
9660 tree typedef_type = NULL_TREE;
9661 int funcdef_flag = 0;
9662 enum tree_code innermost_code = ERROR_MARK;
9665 /* See the code below that used this. */
9666 tree decl_machine_attr = NULL_TREE;
9668 /* Set this to error_mark_node for FIELD_DECLs we could not handle properly.
9669 All FIELD_DECLs we build here have `init' put into their DECL_INITIAL. */
9670 tree init = NULL_TREE;
9672 /* Keep track of what sort of function is being processed
9673 so that we can warn about default return values, or explicit
9674 return values which do not match prescribed defaults. */
9675 special_function_kind sfk = sfk_none;
9677 tree dname = NULL_TREE;
9678 tree ctype = current_class_type;
9679 tree ctor_return_type = NULL_TREE;
9680 enum overload_flags flags = NO_SPECIAL;
9681 tree quals = NULL_TREE;
9682 tree raises = NULL_TREE;
9683 int template_count = 0;
9684 tree in_namespace = NULL_TREE;
9688 RIDBIT_RESET_ALL (specbits);
9689 if (decl_context == FUNCDEF)
9690 funcdef_flag = 1, decl_context = NORMAL;
9691 else if (decl_context == MEMFUNCDEF)
9692 funcdef_flag = -1, decl_context = FIELD;
9693 else if (decl_context == BITFIELD)
9694 bitfield = 1, decl_context = FIELD;
9696 /* Look inside a declarator for the name being declared
9697 and get it as a string, for an error message. */
9699 tree *next = &declarator;
9703 while (next && *next)
9706 switch (TREE_CODE (decl))
9709 /* For attributes. */
9710 next = &TREE_VALUE (decl);
9715 next = &TREE_OPERAND (decl, 0);
9718 case BIT_NOT_EXPR: /* For C++ destructors! */
9720 tree name = TREE_OPERAND (decl, 0);
9721 tree rename = NULL_TREE;
9723 my_friendly_assert (flags == NO_SPECIAL, 152);
9725 sfk = sfk_destructor;
9726 if (TREE_CODE (name) == TYPE_DECL)
9727 TREE_OPERAND (decl, 0) = name = constructor_name (name);
9728 my_friendly_assert (TREE_CODE (name) == IDENTIFIER_NODE, 153);
9729 if (ctype == NULL_TREE)
9731 if (current_class_type == NULL_TREE)
9733 error ("destructors must be member functions");
9738 tree t = constructor_name (current_class_name);
9745 tree t = constructor_name (ctype);
9752 cp_error ("destructor `%T' must match class name `%T'",
9754 TREE_OPERAND (decl, 0) = rename;
9760 case ADDR_EXPR: /* C++ reference declaration */
9765 innermost_code = TREE_CODE (decl);
9766 next = &TREE_OPERAND (decl, 0);
9770 if (parmlist_is_exprlist (CALL_DECLARATOR_PARMS (decl)))
9772 /* This is actually a variable declaration using
9773 constructor syntax. We need to call start_decl and
9774 cp_finish_decl so we can get the variable
9777 tree attributes, prefix_attributes;
9779 *next = TREE_OPERAND (decl, 0);
9780 init = CALL_DECLARATOR_PARMS (decl);
9784 attributes = TREE_PURPOSE (attrlist);
9785 prefix_attributes = TREE_VALUE (attrlist);
9789 attributes = NULL_TREE;
9790 prefix_attributes = NULL_TREE;
9793 decl = start_decl (declarator, declspecs, 1,
9794 attributes, prefix_attributes);
9795 decl_type_access_control (decl);
9798 /* Look for __unused__ attribute */
9799 if (TREE_USED (TREE_TYPE (decl)))
9800 TREE_USED (decl) = 1;
9801 finish_decl (decl, init, NULL_TREE);
9804 cp_error ("invalid declarator");
9807 innermost_code = TREE_CODE (decl);
9808 if (decl_context == FIELD && ctype == NULL_TREE)
9809 ctype = current_class_type;
9811 && TREE_OPERAND (decl, 0)
9812 && (TREE_CODE (TREE_OPERAND (decl, 0)) == TYPE_DECL
9813 && ((DECL_NAME (TREE_OPERAND (decl, 0))
9814 == constructor_name_full (ctype))
9815 || (DECL_NAME (TREE_OPERAND (decl, 0))
9816 == constructor_name (ctype)))))
9817 TREE_OPERAND (decl, 0) = constructor_name (ctype);
9818 next = &TREE_OPERAND (decl, 0);
9820 if (ctype != NULL_TREE
9821 && decl != NULL_TREE && flags != DTOR_FLAG
9822 && decl == constructor_name (ctype))
9824 sfk = sfk_constructor;
9825 ctor_return_type = ctype;
9830 case TEMPLATE_ID_EXPR:
9832 tree fns = TREE_OPERAND (decl, 0);
9834 if (TREE_CODE (fns) == LOOKUP_EXPR)
9835 fns = TREE_OPERAND (fns, 0);
9838 if (TREE_CODE (dname) == COMPONENT_REF)
9839 dname = TREE_OPERAND (dname, 1);
9840 if (TREE_CODE (dname) != IDENTIFIER_NODE)
9842 my_friendly_assert (is_overloaded_fn (dname),
9844 dname = DECL_NAME (get_first_fn (dname));
9849 case IDENTIFIER_NODE:
9850 if (TREE_CODE (decl) == IDENTIFIER_NODE)
9855 if (C_IS_RESERVED_WORD (dname))
9857 cp_error ("declarator-id missing; using reserved word `%D'",
9859 name = IDENTIFIER_POINTER (dname);
9861 else if (!IDENTIFIER_TYPENAME_P (dname))
9862 name = IDENTIFIER_POINTER (dname);
9865 my_friendly_assert (flags == NO_SPECIAL, 154);
9866 flags = TYPENAME_FLAG;
9867 ctor_return_type = TREE_TYPE (dname);
9868 sfk = sfk_conversion;
9869 if (IDENTIFIER_GLOBAL_VALUE (dname)
9870 && (TREE_CODE (IDENTIFIER_GLOBAL_VALUE (dname))
9872 name = IDENTIFIER_POINTER (dname);
9874 name = "<invalid operator>";
9881 /* Perform error checking, and decide on a ctype. */
9882 tree cname = TREE_OPERAND (decl, 0);
9883 if (cname == NULL_TREE)
9885 else if (TREE_CODE (cname) == NAMESPACE_DECL)
9888 in_namespace = TREE_OPERAND (decl, 0);
9889 TREE_OPERAND (decl, 0) = NULL_TREE;
9891 else if (! is_aggr_type (cname, 1))
9892 TREE_OPERAND (decl, 0) = NULL_TREE;
9893 /* Must test TREE_OPERAND (decl, 1), in case user gives
9894 us `typedef (class::memfunc)(int); memfunc *memfuncptr;' */
9895 else if (TREE_OPERAND (decl, 1)
9896 && TREE_CODE (TREE_OPERAND (decl, 1)) == INDIRECT_REF)
9898 else if (TREE_CODE (cname) == TEMPLATE_TYPE_PARM
9899 || TREE_CODE (cname) == BOUND_TEMPLATE_TEMPLATE_PARM)
9901 cp_error ("`%T::%D' is not a valid declarator", cname,
9902 TREE_OPERAND (decl, 1));
9903 cp_error (" perhaps you want `typename %T::%D' to make it a type",
9904 cname, TREE_OPERAND (decl, 1));
9905 return void_type_node;
9907 else if (ctype == NULL_TREE)
9909 else if (TREE_COMPLEXITY (decl) == current_class_depth)
9910 TREE_OPERAND (decl, 0) = ctype;
9913 if (! UNIQUELY_DERIVED_FROM_P (cname, ctype))
9915 cp_error ("type `%T' is not derived from type `%T'",
9917 TREE_OPERAND (decl, 0) = NULL_TREE;
9923 if (ctype && TREE_CODE (TREE_OPERAND (decl, 1)) == TYPE_DECL
9924 && ((DECL_NAME (TREE_OPERAND (decl, 1))
9925 == constructor_name_full (ctype))
9926 || (DECL_NAME (TREE_OPERAND (decl, 1))
9927 == constructor_name (ctype))))
9928 TREE_OPERAND (decl, 1) = constructor_name (ctype);
9929 next = &TREE_OPERAND (decl, 1);
9933 if (TREE_CODE (decl) == IDENTIFIER_NODE
9934 && constructor_name (ctype) == decl)
9936 sfk = sfk_constructor;
9937 ctor_return_type = ctype;
9939 else if (TREE_CODE (decl) == BIT_NOT_EXPR
9940 && TREE_CODE (TREE_OPERAND (decl, 0)) == IDENTIFIER_NODE
9941 && (constructor_name (ctype) == TREE_OPERAND (decl, 0)
9942 || constructor_name_full (ctype) == TREE_OPERAND (decl, 0)))
9944 sfk = sfk_destructor;
9945 ctor_return_type = ctype;
9947 TREE_OPERAND (decl, 0) = constructor_name (ctype);
9948 next = &TREE_OPERAND (decl, 0);
9959 /* Parse error puts this typespec where
9960 a declarator should go. */
9961 cp_error ("`%T' specified as declarator-id", DECL_NAME (decl));
9962 if (TREE_TYPE (decl) == current_class_type)
9963 cp_error (" perhaps you want `%T' for a constructor",
9964 current_class_name);
9965 dname = DECL_NAME (decl);
9966 name = IDENTIFIER_POINTER (dname);
9968 /* Avoid giving two errors for this. */
9969 IDENTIFIER_CLASS_VALUE (dname) = NULL_TREE;
9971 declspecs = tree_cons (NULL_TREE, integer_type_node, declspecs);
9977 cp_compiler_error ("`%D' as declarator", decl);
9978 return 0; /* We used to do a 155 abort here. */
9983 /* A function definition's declarator must have the form of
9984 a function declarator. */
9986 if (funcdef_flag && innermost_code != CALL_EXPR)
9989 if (((dname && IDENTIFIER_OPNAME_P (dname)) || flags == TYPENAME_FLAG)
9990 && innermost_code != CALL_EXPR
9991 && ! (ctype && declspecs == NULL_TREE))
9993 cp_error ("declaration of `%D' as non-function", dname);
9994 return void_type_node;
9997 /* Anything declared one level down from the top level
9998 must be one of the parameters of a function
9999 (because the body is at least two levels down). */
10001 /* This heuristic cannot be applied to C++ nodes! Fixed, however,
10002 by not allowing C++ class definitions to specify their parameters
10003 with xdecls (must be spec.d in the parmlist).
10005 Since we now wait to push a class scope until we are sure that
10006 we are in a legitimate method context, we must set oldcname
10007 explicitly (since current_class_name is not yet alive).
10009 We also want to avoid calling this a PARM if it is in a namespace. */
10011 if (decl_context == NORMAL && !toplevel_bindings_p ())
10013 struct binding_level *b = current_binding_level;
10014 current_binding_level = b->level_chain;
10015 if (current_binding_level != 0 && toplevel_bindings_p ())
10016 decl_context = PARM;
10017 current_binding_level = b;
10021 name = decl_context == PARM ? "parameter" : "type name";
10023 /* Look through the decl specs and record which ones appear.
10024 Some typespecs are defined as built-in typenames.
10025 Others, the ones that are modifiers of other types,
10026 are represented by bits in SPECBITS: set the bits for
10027 the modifiers that appear. Storage class keywords are also in SPECBITS.
10029 If there is a typedef name or a type, store the type in TYPE.
10030 This includes builtin typedefs such as `int'.
10032 Set EXPLICIT_INT if the type is `int' or `char' and did not
10033 come from a user typedef.
10035 Set LONGLONG if `long' is mentioned twice.
10037 For C++, constructors and destructors have their own fast treatment. */
10039 for (spec = declspecs; spec; spec = TREE_CHAIN (spec))
10044 /* Certain parse errors slip through. For example,
10045 `int class;' is not caught by the parser. Try
10046 weakly to recover here. */
10047 if (TREE_CODE (spec) != TREE_LIST)
10050 id = TREE_VALUE (spec);
10052 if (TREE_CODE (id) == IDENTIFIER_NODE)
10054 if (id == ridpointers[(int) RID_INT]
10055 || id == ridpointers[(int) RID_CHAR]
10056 || id == ridpointers[(int) RID_BOOL]
10057 || id == ridpointers[(int) RID_WCHAR])
10061 if (id == ridpointers[(int) RID_BOOL])
10062 error ("`bool' is now a keyword");
10064 cp_error ("extraneous `%T' ignored", id);
10068 if (id == ridpointers[(int) RID_INT])
10070 else if (id == ridpointers[(int) RID_CHAR])
10072 type = TREE_TYPE (IDENTIFIER_GLOBAL_VALUE (id));
10076 /* C++ aggregate types. */
10077 if (IDENTIFIER_HAS_TYPE_VALUE (id))
10080 cp_error ("multiple declarations `%T' and `%T'", type, id);
10082 type = IDENTIFIER_TYPE_VALUE (id);
10086 for (i = (int) RID_FIRST_MODIFIER; i <= (int) RID_LAST_MODIFIER; i++)
10088 if (ridpointers[i] == id)
10090 if (i == (int) RID_LONG && RIDBIT_SETP (i, specbits))
10092 if (pedantic && ! in_system_header && warn_long_long)
10093 pedwarn ("ISO C++ does not support `long long'");
10095 error ("`long long long' is too long for GCC");
10099 else if (RIDBIT_SETP (i, specbits))
10100 pedwarn ("duplicate `%s'", IDENTIFIER_POINTER (id));
10101 RIDBIT_SET (i, specbits);
10106 /* C++ aggregate types. */
10107 else if (TREE_CODE (id) == TYPE_DECL)
10110 cp_error ("multiple declarations `%T' and `%T'", type,
10114 type = TREE_TYPE (id);
10115 TREE_VALUE (spec) = type;
10120 error ("two or more data types in declaration of `%s'", name);
10121 else if (TREE_CODE (id) == IDENTIFIER_NODE)
10123 register tree t = lookup_name (id, 1);
10124 if (!t || TREE_CODE (t) != TYPE_DECL)
10125 error ("`%s' fails to be a typedef or built in type",
10126 IDENTIFIER_POINTER (id));
10129 type = TREE_TYPE (t);
10131 /* See the code below that used this. */
10132 decl_machine_attr = DECL_MACHINE_ATTRIBUTES (id);
10137 else if (id != error_mark_node)
10138 /* Can't change CLASS nodes into RECORD nodes here! */
10144 typedef_type = type;
10146 /* No type at all: default to `int', and set DEFAULTED_INT
10147 because it was not a user-defined typedef. */
10149 if (type == NULL_TREE
10150 && (RIDBIT_SETP (RID_SIGNED, specbits)
10151 || RIDBIT_SETP (RID_UNSIGNED, specbits)
10152 || RIDBIT_SETP (RID_LONG, specbits)
10153 || RIDBIT_SETP (RID_SHORT, specbits)))
10155 /* These imply 'int'. */
10156 type = integer_type_node;
10160 if (sfk != sfk_none)
10161 type = check_special_function_return_type (sfk, type,
10164 else if (type == NULL_TREE)
10170 /* We handle `main' specially here, because 'main () { }' is so
10171 common. With no options, it is allowed. With -Wreturn-type,
10172 it is a warning. It is only an error with -pedantic-errors. */
10173 is_main = (funcdef_flag
10174 && MAIN_NAME_P (dname)
10175 && ctype == NULL_TREE
10176 && in_namespace == NULL_TREE
10177 && current_namespace == global_namespace);
10179 if (in_system_header || flag_ms_extensions)
10180 /* Allow it, sigh. */;
10181 else if (pedantic || ! is_main)
10182 cp_pedwarn ("ISO C++ forbids declaration of `%s' with no type",
10184 else if (warn_return_type)
10185 cp_warning ("ISO C++ forbids declaration of `%s' with no type",
10188 type = integer_type_node;
10193 /* Now process the modifiers that were specified
10194 and check for invalid combinations. */
10196 /* Long double is a special combination. */
10198 if (RIDBIT_SETP (RID_LONG, specbits)
10199 && TYPE_MAIN_VARIANT (type) == double_type_node)
10201 RIDBIT_RESET (RID_LONG, specbits);
10202 type = build_qualified_type (long_double_type_node,
10203 CP_TYPE_QUALS (type));
10206 /* Check all other uses of type modifiers. */
10208 if (RIDBIT_SETP (RID_UNSIGNED, specbits)
10209 || RIDBIT_SETP (RID_SIGNED, specbits)
10210 || RIDBIT_SETP (RID_LONG, specbits)
10211 || RIDBIT_SETP (RID_SHORT, specbits))
10215 if (TREE_CODE (type) == REAL_TYPE)
10216 error ("short, signed or unsigned invalid for `%s'", name);
10217 else if (TREE_CODE (type) != INTEGER_TYPE)
10218 error ("long, short, signed or unsigned invalid for `%s'", name);
10219 else if (RIDBIT_SETP (RID_LONG, specbits)
10220 && RIDBIT_SETP (RID_SHORT, specbits))
10221 error ("long and short specified together for `%s'", name);
10222 else if ((RIDBIT_SETP (RID_LONG, specbits)
10223 || RIDBIT_SETP (RID_SHORT, specbits))
10225 error ("long or short specified with char for `%s'", name);
10226 else if ((RIDBIT_SETP (RID_LONG, specbits)
10227 || RIDBIT_SETP (RID_SHORT, specbits))
10228 && TREE_CODE (type) == REAL_TYPE)
10229 error ("long or short specified with floating type for `%s'", name);
10230 else if (RIDBIT_SETP (RID_SIGNED, specbits)
10231 && RIDBIT_SETP (RID_UNSIGNED, specbits))
10232 error ("signed and unsigned given together for `%s'", name);
10236 if (!explicit_int && !defaulted_int && !explicit_char && pedantic)
10238 pedwarn ("long, short, signed or unsigned used invalidly for `%s'",
10240 if (flag_pedantic_errors)
10245 /* Discard the type modifiers if they are invalid. */
10248 RIDBIT_RESET (RID_UNSIGNED, specbits);
10249 RIDBIT_RESET (RID_SIGNED, specbits);
10250 RIDBIT_RESET (RID_LONG, specbits);
10251 RIDBIT_RESET (RID_SHORT, specbits);
10256 if (RIDBIT_SETP (RID_COMPLEX, specbits)
10257 && TREE_CODE (type) != INTEGER_TYPE && TREE_CODE (type) != REAL_TYPE)
10259 error ("complex invalid for `%s'", name);
10260 RIDBIT_RESET (RID_COMPLEX, specbits);
10263 /* Decide whether an integer type is signed or not.
10264 Optionally treat bitfields as signed by default. */
10265 if (RIDBIT_SETP (RID_UNSIGNED, specbits)
10268 It is implementation-defined whether a plain (neither
10269 explicitly signed or unsigned) char, short, int, or long
10270 bit-field is signed or unsigned.
10272 Naturally, we extend this to long long as well. Note that
10273 this does not include wchar_t. */
10274 || (bitfield && !flag_signed_bitfields
10275 && RIDBIT_NOTSETP (RID_SIGNED, specbits)
10276 /* A typedef for plain `int' without `signed' can be
10277 controlled just like plain `int', but a typedef for
10278 `signed int' cannot be so controlled. */
10280 && C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl))
10281 && (TREE_CODE (type) == INTEGER_TYPE
10282 || TREE_CODE (type) == CHAR_TYPE)
10283 && !same_type_p (TYPE_MAIN_VARIANT (type), wchar_type_node)))
10286 type = long_long_unsigned_type_node;
10287 else if (RIDBIT_SETP (RID_LONG, specbits))
10288 type = long_unsigned_type_node;
10289 else if (RIDBIT_SETP (RID_SHORT, specbits))
10290 type = short_unsigned_type_node;
10291 else if (type == char_type_node)
10292 type = unsigned_char_type_node;
10293 else if (typedef_decl)
10294 type = unsigned_type (type);
10296 type = unsigned_type_node;
10298 else if (RIDBIT_SETP (RID_SIGNED, specbits)
10299 && type == char_type_node)
10300 type = signed_char_type_node;
10302 type = long_long_integer_type_node;
10303 else if (RIDBIT_SETP (RID_LONG, specbits))
10304 type = long_integer_type_node;
10305 else if (RIDBIT_SETP (RID_SHORT, specbits))
10306 type = short_integer_type_node;
10308 if (RIDBIT_SETP (RID_COMPLEX, specbits))
10310 /* If we just have "complex", it is equivalent to
10311 "complex double", but if any modifiers at all are specified it is
10312 the complex form of TYPE. E.g, "complex short" is
10313 "complex short int". */
10315 if (defaulted_int && ! longlong
10316 && ! (RIDBIT_SETP (RID_LONG, specbits)
10317 || RIDBIT_SETP (RID_SHORT, specbits)
10318 || RIDBIT_SETP (RID_SIGNED, specbits)
10319 || RIDBIT_SETP (RID_UNSIGNED, specbits)))
10320 type = complex_double_type_node;
10321 else if (type == integer_type_node)
10322 type = complex_integer_type_node;
10323 else if (type == float_type_node)
10324 type = complex_float_type_node;
10325 else if (type == double_type_node)
10326 type = complex_double_type_node;
10327 else if (type == long_double_type_node)
10328 type = complex_long_double_type_node;
10330 type = build_complex_type (type);
10333 if (sfk == sfk_conversion
10334 && (RIDBIT_SETP (RID_CONST, specbits)
10335 || RIDBIT_SETP (RID_VOLATILE, specbits)
10336 || RIDBIT_SETP (RID_RESTRICT, specbits)))
10337 cp_error ("qualifiers are not allowed on declaration of `operator %T'",
10340 /* Set CONSTP if this declaration is `const', whether by
10341 explicit specification or via a typedef.
10342 Likewise for VOLATILEP. */
10344 constp = !! RIDBIT_SETP (RID_CONST, specbits) + CP_TYPE_CONST_P (type);
10346 !! RIDBIT_SETP (RID_RESTRICT, specbits) + CP_TYPE_RESTRICT_P (type);
10348 !! RIDBIT_SETP (RID_VOLATILE, specbits) + CP_TYPE_VOLATILE_P (type);
10349 type_quals = ((constp ? TYPE_QUAL_CONST : 0)
10350 | (restrictp ? TYPE_QUAL_RESTRICT : 0)
10351 | (volatilep ? TYPE_QUAL_VOLATILE : 0));
10352 type = cp_build_qualified_type (type, type_quals);
10354 inlinep = !! RIDBIT_SETP (RID_INLINE, specbits);
10355 virtualp = RIDBIT_SETP (RID_VIRTUAL, specbits);
10356 RIDBIT_RESET (RID_VIRTUAL, specbits);
10357 explicitp = RIDBIT_SETP (RID_EXPLICIT, specbits) != 0;
10358 RIDBIT_RESET (RID_EXPLICIT, specbits);
10360 if (RIDBIT_SETP (RID_STATIC, specbits))
10361 staticp = 1 + (decl_context == FIELD);
10363 if (virtualp && staticp == 2)
10365 cp_error ("member `%D' cannot be declared both virtual and static",
10369 friendp = RIDBIT_SETP (RID_FRIEND, specbits);
10370 RIDBIT_RESET (RID_FRIEND, specbits);
10372 /* Warn if two storage classes are given. Default to `auto'. */
10374 if (RIDBIT_ANY_SET (specbits))
10376 if (RIDBIT_SETP (RID_STATIC, specbits)) nclasses++;
10377 if (RIDBIT_SETP (RID_EXTERN, specbits)) nclasses++;
10378 if (decl_context == PARM && nclasses > 0)
10379 error ("storage class specifiers invalid in parameter declarations");
10380 if (RIDBIT_SETP (RID_TYPEDEF, specbits))
10382 if (decl_context == PARM)
10383 error ("typedef declaration invalid in parameter declaration");
10386 if (RIDBIT_SETP (RID_AUTO, specbits)) nclasses++;
10387 if (RIDBIT_SETP (RID_REGISTER, specbits)) nclasses++;
10390 /* Give error if `virtual' is used outside of class declaration. */
10392 && (current_class_name == NULL_TREE || decl_context != FIELD))
10394 error ("virtual outside class declaration");
10398 /* Static anonymous unions are dealt with here. */
10399 if (staticp && decl_context == TYPENAME
10400 && TREE_CODE (declspecs) == TREE_LIST
10401 && ANON_AGGR_TYPE_P (TREE_VALUE (declspecs)))
10402 decl_context = FIELD;
10404 /* Warn about storage classes that are invalid for certain
10405 kinds of declarations (parameters, typenames, etc.). */
10408 error ("multiple storage classes in declaration of `%s'", name);
10409 else if (decl_context != NORMAL && nclasses > 0)
10411 if ((decl_context == PARM || decl_context == CATCHPARM)
10412 && (RIDBIT_SETP (RID_REGISTER, specbits)
10413 || RIDBIT_SETP (RID_AUTO, specbits)))
10415 else if (RIDBIT_SETP (RID_TYPEDEF, specbits))
10417 else if (decl_context == FIELD
10418 /* C++ allows static class elements */
10419 && RIDBIT_SETP (RID_STATIC, specbits))
10420 /* C++ also allows inlines and signed and unsigned elements,
10421 but in those cases we don't come in here. */
10425 if (decl_context == FIELD)
10427 tree tmp = NULL_TREE;
10428 register int op = 0;
10432 /* Avoid trying to get an operand off an identifier node. */
10433 if (TREE_CODE (declarator) == IDENTIFIER_NODE)
10436 tmp = TREE_OPERAND (declarator, 0);
10437 op = IDENTIFIER_OPNAME_P (tmp);
10438 if (IDENTIFIER_TYPENAME_P (tmp))
10440 if (IDENTIFIER_GLOBAL_VALUE (tmp)
10441 && (TREE_CODE (IDENTIFIER_GLOBAL_VALUE (tmp))
10443 name = IDENTIFIER_POINTER (tmp);
10445 name = "<invalid operator>";
10448 error ("storage class specified for %s `%s'",
10449 op ? "member operator" : "field",
10454 if (decl_context == PARM || decl_context == CATCHPARM)
10455 error ("storage class specified for parameter `%s'", name);
10457 error ("storage class specified for typename");
10459 RIDBIT_RESET (RID_REGISTER, specbits);
10460 RIDBIT_RESET (RID_AUTO, specbits);
10461 RIDBIT_RESET (RID_EXTERN, specbits);
10464 else if (RIDBIT_SETP (RID_EXTERN, specbits) && initialized && !funcdef_flag)
10466 if (toplevel_bindings_p ())
10468 /* It's common practice (and completely valid) to have a const
10469 be initialized and declared extern. */
10470 if (!(type_quals & TYPE_QUAL_CONST))
10471 warning ("`%s' initialized and declared `extern'", name);
10474 error ("`%s' has both `extern' and initializer", name);
10476 else if (RIDBIT_SETP (RID_EXTERN, specbits) && funcdef_flag
10477 && ! toplevel_bindings_p ())
10478 error ("nested function `%s' declared `extern'", name);
10479 else if (toplevel_bindings_p ())
10481 if (RIDBIT_SETP (RID_AUTO, specbits))
10482 error ("top-level declaration of `%s' specifies `auto'", name);
10485 if (nclasses > 0 && friendp)
10486 error ("storage class specifiers invalid in friend function declarations");
10488 /* Now figure out the structure of the declarator proper.
10489 Descend through it, creating more complex types, until we reach
10490 the declared identifier (or NULL_TREE, in an absolute declarator). */
10492 inner_attrs = NULL_TREE;
10495 while (declarator && TREE_CODE (declarator) != IDENTIFIER_NODE
10496 && TREE_CODE (declarator) != TEMPLATE_ID_EXPR)
10498 /* Each level of DECLARATOR is either an ARRAY_REF (for ...[..]),
10499 an INDIRECT_REF (for *...),
10500 a CALL_EXPR (for ...(...)),
10501 an identifier (for the name being declared)
10502 or a null pointer (for the place in an absolute declarator
10503 where the name was omitted).
10504 For the last two cases, we have just exited the loop.
10506 For C++ it could also be
10507 a SCOPE_REF (for class :: ...). In this case, we have converted
10508 sensible names to types, and those are the values we use to
10509 qualify the member name.
10510 an ADDR_EXPR (for &...),
10511 a BIT_NOT_EXPR (for destructors)
10513 At this point, TYPE is the type of elements of an array,
10514 or for a function to return, or for a pointer to point to.
10515 After this sequence of ifs, TYPE is the type of the
10516 array or function or pointer, and DECLARATOR has had its
10517 outermost layer removed. */
10519 if (type == error_mark_node)
10521 if (TREE_CODE (declarator) == SCOPE_REF)
10522 declarator = TREE_OPERAND (declarator, 1);
10524 declarator = TREE_OPERAND (declarator, 0);
10527 if (quals != NULL_TREE
10528 && (declarator == NULL_TREE
10529 || TREE_CODE (declarator) != SCOPE_REF))
10531 if (ctype == NULL_TREE && TREE_CODE (type) == METHOD_TYPE)
10532 ctype = TYPE_METHOD_BASETYPE (type);
10533 if (ctype != NULL_TREE)
10535 tree dummy = build_decl (TYPE_DECL, NULL_TREE, type);
10536 grok_method_quals (ctype, dummy, quals);
10537 type = TREE_TYPE (dummy);
10538 ctype = TREE_TYPE (TREE_VALUE (TYPE_ARG_TYPES (type)));
10543 /* See the comment for the TREE_LIST case, below. */
10546 else if (inner_attrs)
10548 decl_attributes (type, inner_attrs, NULL_TREE);
10549 inner_attrs = NULL_TREE;
10552 switch (TREE_CODE (declarator))
10556 /* We encode a declarator with embedded attributes using
10557 a TREE_LIST. The attributes apply to the declarator
10558 directly inside them, so we have to skip an iteration
10559 before applying them to the type. If the declarator just
10560 inside is the declarator-id, we apply the attrs to the
10562 inner_attrs = TREE_PURPOSE (declarator);
10564 declarator = TREE_VALUE (declarator);
10570 register tree size;
10572 size = TREE_OPERAND (declarator, 1);
10574 /* VC++ spells a zero-sized array with []. */
10575 if (size == NULL_TREE && decl_context == FIELD && ! staticp
10576 && ! RIDBIT_SETP (RID_TYPEDEF, specbits))
10577 size = integer_zero_node;
10579 declarator = TREE_OPERAND (declarator, 0);
10581 type = create_array_type_for_decl (dname, type, size);
10583 /* VLAs never work as fields. */
10584 if (decl_context == FIELD && !processing_template_decl
10585 && TREE_CODE (type) == ARRAY_TYPE
10586 && TYPE_DOMAIN (type) != NULL_TREE
10587 && !TREE_CONSTANT (TYPE_MAX_VALUE (TYPE_DOMAIN (type))))
10589 cp_error ("size of member `%D' is not constant", dname);
10590 /* Proceed with arbitrary constant size, so that offset
10591 computations don't get confused. */
10592 type = create_array_type_for_decl (dname, TREE_TYPE (type),
10604 tree inner_parms = CALL_DECLARATOR_PARMS (declarator);
10605 tree inner_decl = TREE_OPERAND (declarator, 0);
10607 /* Declaring a function type.
10608 Make sure we have a valid type for the function to return. */
10610 /* We now know that the TYPE_QUALS don't apply to the
10611 decl, but to its return type. */
10612 type_quals = TYPE_UNQUALIFIED;
10614 /* Warn about some types functions can't return. */
10616 if (TREE_CODE (type) == FUNCTION_TYPE)
10618 error ("`%s' declared as function returning a function", name);
10619 type = integer_type_node;
10621 if (TREE_CODE (type) == ARRAY_TYPE)
10623 error ("`%s' declared as function returning an array", name);
10624 type = integer_type_node;
10627 if (inner_decl && TREE_CODE (inner_decl) == SCOPE_REF)
10628 inner_decl = TREE_OPERAND (inner_decl, 1);
10630 if (inner_decl && TREE_CODE (inner_decl) == TEMPLATE_ID_EXPR)
10631 inner_decl = dname;
10633 /* Pick up type qualifiers which should be applied to `this'. */
10634 quals = CALL_DECLARATOR_QUALS (declarator);
10636 /* Pick up the exception specifications. */
10637 raises = CALL_DECLARATOR_EXCEPTION_SPEC (declarator);
10639 /* Say it's a definition only for the CALL_EXPR
10640 closest to the identifier. */
10643 && (TREE_CODE (inner_decl) == IDENTIFIER_NODE
10644 || TREE_CODE (inner_decl) == TEMPLATE_ID_EXPR
10645 || TREE_CODE (inner_decl) == BIT_NOT_EXPR);
10647 if (ctype == NULL_TREE
10648 && decl_context == FIELD
10650 && (friendp == 0 || dname == current_class_name))
10651 ctype = current_class_type;
10653 if (ctype && sfk == sfk_conversion)
10654 TYPE_HAS_CONVERSION (ctype) = 1;
10655 if (ctype && constructor_name (ctype) == dname)
10657 /* We are within a class's scope. If our declarator name
10658 is the same as the class name, and we are defining
10659 a function, then it is a constructor/destructor, and
10660 therefore returns a void type. */
10662 if (flags == DTOR_FLAG)
10664 /* ISO C++ 12.4/2. A destructor may not be
10665 declared const or volatile. A destructor may
10668 error ("destructor cannot be static member function");
10671 cp_error ("destructors may not be `%s'",
10672 IDENTIFIER_POINTER (TREE_VALUE (quals)));
10675 if (decl_context == FIELD)
10677 if (! member_function_or_else (ctype,
10678 current_class_type,
10680 return void_type_node;
10683 else /* It's a constructor. */
10685 if (explicitp == 1)
10687 /* ISO C++ 12.1. A constructor may not be
10688 declared const or volatile. A constructor may
10689 not be virtual. A constructor may not be
10692 error ("constructor cannot be static member function");
10695 pedwarn ("constructors cannot be declared virtual");
10700 cp_error ("constructors may not be `%s'",
10701 IDENTIFIER_POINTER (TREE_VALUE (quals)));
10705 RID_BIT_TYPE tmp_bits;
10706 bcopy ((void*)&specbits, (void*)&tmp_bits, sizeof (RID_BIT_TYPE));
10707 RIDBIT_RESET (RID_INLINE, tmp_bits);
10708 RIDBIT_RESET (RID_STATIC, tmp_bits);
10709 if (RIDBIT_ANY_SET (tmp_bits))
10710 error ("return value type specifier for constructor ignored");
10712 if (decl_context == FIELD)
10714 if (! member_function_or_else (ctype,
10715 current_class_type,
10717 return void_type_node;
10718 TYPE_HAS_CONSTRUCTOR (ctype) = 1;
10719 if (sfk != sfk_constructor)
10723 if (decl_context == FIELD)
10729 error ("can't initialize friend function `%s'", name);
10732 /* Cannot be both friend and virtual. */
10733 error ("virtual functions cannot be friends");
10734 RIDBIT_RESET (RID_FRIEND, specbits);
10737 if (decl_context == NORMAL)
10738 error ("friend declaration not in class definition");
10739 if (current_function_decl && funcdef_flag)
10740 cp_error ("can't define friend function `%s' in a local class definition",
10744 /* Construct the function type and go to the next
10745 inner layer of declarator. */
10747 declarator = TREE_OPERAND (declarator, 0);
10749 /* FIXME: This is where default args should be fully
10752 arg_types = grokparms (inner_parms, funcdecl_p ? funcdef_flag : 0);
10754 if (declarator && flags == DTOR_FLAG)
10756 /* A destructor declared in the body of a class will
10757 be represented as a BIT_NOT_EXPR. But, we just
10758 want the underlying IDENTIFIER. */
10759 if (TREE_CODE (declarator) == BIT_NOT_EXPR)
10760 declarator = TREE_OPERAND (declarator, 0);
10762 if (arg_types != void_list_node)
10764 cp_error ("destructors may not have parameters");
10765 arg_types = void_list_node;
10766 last_function_parms = NULL_TREE;
10770 /* ANSI says that `const int foo ();'
10771 does not make the function foo const. */
10772 type = build_function_type (type, arg_types);
10776 for (t = arg_types; t; t = TREE_CHAIN (t))
10777 if (TREE_PURPOSE (t)
10778 && TREE_CODE (TREE_PURPOSE (t)) == DEFAULT_ARG)
10780 add_defarg_fn (type);
10789 /* Filter out pointers-to-references and references-to-references.
10790 We can get these if a TYPE_DECL is used. */
10792 if (TREE_CODE (type) == REFERENCE_TYPE)
10794 error ("cannot declare %s to references",
10795 TREE_CODE (declarator) == ADDR_EXPR
10796 ? "references" : "pointers");
10797 declarator = TREE_OPERAND (declarator, 0);
10801 if (TREE_CODE (type) == OFFSET_TYPE
10802 && (TREE_CODE (TREE_TYPE (type)) == VOID_TYPE
10803 || TREE_CODE (TREE_TYPE (type)) == REFERENCE_TYPE))
10805 cp_error ("cannot declare pointer to `%#T' member",
10807 type = TREE_TYPE (type);
10810 /* Merge any constancy or volatility into the target type
10811 for the pointer. */
10813 /* We now know that the TYPE_QUALS don't apply to the decl,
10814 but to the target of the pointer. */
10815 type_quals = TYPE_UNQUALIFIED;
10817 if (TREE_CODE (declarator) == ADDR_EXPR)
10819 if (TREE_CODE (type) == VOID_TYPE)
10820 error ("invalid type: `void &'");
10822 type = build_reference_type (type);
10824 else if (TREE_CODE (type) == METHOD_TYPE)
10825 type = build_ptrmemfunc_type (build_pointer_type (type));
10827 type = build_pointer_type (type);
10829 /* Process a list of type modifier keywords (such as
10830 const or volatile) that were given inside the `*' or `&'. */
10832 if (TREE_TYPE (declarator))
10834 register tree typemodlist;
10840 for (typemodlist = TREE_TYPE (declarator); typemodlist;
10841 typemodlist = TREE_CHAIN (typemodlist))
10843 tree qualifier = TREE_VALUE (typemodlist);
10845 if (qualifier == ridpointers[(int) RID_CONST])
10847 else if (qualifier == ridpointers[(int) RID_VOLATILE])
10849 else if (qualifier == ridpointers[(int) RID_RESTRICT])
10854 error ("invalid type modifier within pointer declarator");
10858 pedwarn ("duplicate `const'");
10860 pedwarn ("duplicate `volatile'");
10862 pedwarn ("duplicate `restrict'");
10864 type_quals = ((constp ? TYPE_QUAL_CONST : 0)
10865 | (restrictp ? TYPE_QUAL_RESTRICT : 0)
10866 | (volatilep ? TYPE_QUAL_VOLATILE : 0));
10867 if (TREE_CODE (declarator) == ADDR_EXPR
10868 && (constp || volatilep))
10871 pedwarn ("discarding `const' applied to a reference");
10873 pedwarn ("discarding `volatile' applied to a reference");
10874 type_quals &= ~(TYPE_QUAL_CONST | TYPE_QUAL_VOLATILE);
10876 type = cp_build_qualified_type (type, type_quals);
10878 declarator = TREE_OPERAND (declarator, 0);
10884 /* We have converted type names to NULL_TREE if the
10885 name was bogus, or to a _TYPE node, if not.
10887 The variable CTYPE holds the type we will ultimately
10888 resolve to. The code here just needs to build
10889 up appropriate member types. */
10890 tree sname = TREE_OPERAND (declarator, 1);
10893 /* Destructors can have their visibilities changed as well. */
10894 if (TREE_CODE (sname) == BIT_NOT_EXPR)
10895 sname = TREE_OPERAND (sname, 0);
10897 if (TREE_COMPLEXITY (declarator) == 0)
10898 /* This needs to be here, in case we are called
10899 multiple times. */ ;
10900 else if (TREE_COMPLEXITY (declarator) == -1)
10901 /* Namespace member. */
10902 pop_decl_namespace ();
10903 else if (friendp && (TREE_COMPLEXITY (declarator) < 2))
10904 /* Don't fall out into global scope. Hides real bug? --eichin */ ;
10905 else if (! IS_AGGR_TYPE_CODE
10906 (TREE_CODE (TREE_OPERAND (declarator, 0))))
10908 else if (TREE_COMPLEXITY (declarator) == current_class_depth)
10910 /* Resolve any TYPENAME_TYPEs from the decl-specifier-seq
10911 that refer to ctype. They couldn't be resolved earlier
10912 because we hadn't pushed into the class yet.
10913 Example: resolve 'B<T>::type' in
10914 'B<typename B<T>::type> B<T>::f () { }'. */
10915 if (current_template_parms
10916 && uses_template_parms (type)
10917 && uses_template_parms (current_class_type))
10919 tree args = current_template_args ();
10920 type = tsubst (type, args, /*complain=*/1, NULL_TREE);
10923 /* This pop_nested_class corresponds to the
10924 push_nested_class used to push into class scope for
10925 parsing the argument list of a function decl, in
10927 pop_nested_class ();
10928 TREE_COMPLEXITY (declarator) = current_class_depth;
10931 my_friendly_abort (16);
10933 if (TREE_OPERAND (declarator, 0) == NULL_TREE)
10935 /* We had a reference to a global decl, or
10936 perhaps we were given a non-aggregate typedef,
10937 in which case we cleared this out, and should just
10938 keep going as though it wasn't there. */
10939 declarator = sname;
10942 ctype = TREE_OPERAND (declarator, 0);
10945 while (t != NULL_TREE && CLASS_TYPE_P (t))
10947 /* You're supposed to have one `template <...>'
10948 for every template class, but you don't need one
10949 for a full specialization. For example:
10951 template <class T> struct S{};
10952 template <> struct S<int> { void f(); };
10953 void S<int>::f () {}
10955 is correct; there shouldn't be a `template <>' for
10956 the definition of `S<int>::f'. */
10957 if (CLASSTYPE_TEMPLATE_INFO (t)
10958 && (CLASSTYPE_TEMPLATE_INSTANTIATION (t)
10959 || uses_template_parms (CLASSTYPE_TI_ARGS (t))))
10960 template_count += 1;
10962 t = TYPE_MAIN_DECL (t);
10963 if (DECL_LANG_SPECIFIC (t))
10964 t = DECL_CONTEXT (t);
10969 if (sname == NULL_TREE)
10972 if (TREE_CODE (sname) == IDENTIFIER_NODE)
10974 /* This is the `standard' use of the scoping operator:
10975 basetype :: member . */
10977 if (ctype == current_class_type)
10983 Is this ill-formed? */
10986 cp_pedwarn ("extra qualification `%T::' on member `%s' ignored",
10989 else if (TREE_CODE (type) == FUNCTION_TYPE)
10991 if (current_class_type == NULL_TREE
10993 type = build_cplus_method_type (ctype, TREE_TYPE (type),
10994 TYPE_ARG_TYPES (type));
10997 cp_error ("cannot declare member function `%T::%s' within `%T'",
10998 ctype, name, current_class_type);
10999 return void_type_node;
11002 else if (RIDBIT_SETP (RID_TYPEDEF, specbits)
11003 || COMPLETE_TYPE_P (complete_type (ctype)))
11005 /* Have to move this code elsewhere in this function.
11006 this code is used for i.e., typedef int A::M; M *pm;
11008 It is? How? jason 10/2/94 */
11010 if (current_class_type)
11012 cp_error ("cannot declare member `%T::%s' within `%T'",
11013 ctype, name, current_class_type);
11014 return void_type_node;
11016 type = build_offset_type (ctype, type);
11018 else if (uses_template_parms (ctype))
11020 if (TREE_CODE (type) == FUNCTION_TYPE)
11022 = build_cplus_method_type (ctype, TREE_TYPE (type),
11023 TYPE_ARG_TYPES (type));
11027 cp_error ("structure `%T' not yet defined", ctype);
11028 return error_mark_node;
11031 declarator = sname;
11033 else if (TREE_CODE (sname) == SCOPE_REF)
11034 my_friendly_abort (17);
11038 declarator = TREE_OPERAND (declarator, 1);
11039 if (declarator && TREE_CODE (declarator) == CALL_EXPR)
11040 /* In this case, we will deal with it later. */
11044 if (TREE_CODE (type) == FUNCTION_TYPE)
11045 type = build_cplus_method_type (ctype, TREE_TYPE (type),
11046 TYPE_ARG_TYPES (type));
11048 type = build_offset_type (ctype, type);
11055 declarator = TREE_OPERAND (declarator, 0);
11060 case ENUMERAL_TYPE:
11061 declarator = NULL_TREE;
11065 declarator = NULL_TREE;
11069 my_friendly_abort (158);
11073 /* See the comment for the TREE_LIST case, above. */
11076 if (! ignore_attrs)
11077 decl_attributes (type, inner_attrs, NULL_TREE);
11079 TREE_VALUE (attrlist) = chainon (inner_attrs, TREE_VALUE (attrlist));
11081 attrlist = build_tree_list (NULL_TREE, inner_attrs);
11084 /* Now TYPE has the actual type. */
11086 if (explicitp == 1 || (explicitp && friendp))
11088 /* [dcl.fct.spec] The explicit specifier shall only be used in
11089 declarations of constructors within a class definition. */
11090 error ("only declarations of constructors can be `explicit'");
11094 if (RIDBIT_SETP (RID_MUTABLE, specbits))
11096 if (current_class_name == NULL_TREE || decl_context == PARM || friendp)
11098 error ("non-member `%s' cannot be declared `mutable'", name);
11099 RIDBIT_RESET (RID_MUTABLE, specbits);
11101 else if (decl_context == TYPENAME || RIDBIT_SETP (RID_TYPEDEF, specbits))
11103 error ("non-object member `%s' cannot be declared `mutable'", name);
11104 RIDBIT_RESET (RID_MUTABLE, specbits);
11106 else if (TREE_CODE (type) == FUNCTION_TYPE
11107 || TREE_CODE (type) == METHOD_TYPE)
11109 error ("function `%s' cannot be declared `mutable'", name);
11110 RIDBIT_RESET (RID_MUTABLE, specbits);
11114 error ("static `%s' cannot be declared `mutable'", name);
11115 RIDBIT_RESET (RID_MUTABLE, specbits);
11117 else if (type_quals & TYPE_QUAL_CONST)
11119 error ("const `%s' cannot be declared `mutable'", name);
11120 RIDBIT_RESET (RID_MUTABLE, specbits);
11124 if (declarator == NULL_TREE
11125 || TREE_CODE (declarator) == IDENTIFIER_NODE
11126 || (TREE_CODE (declarator) == TEMPLATE_ID_EXPR
11127 && (TREE_CODE (type) == FUNCTION_TYPE
11128 || TREE_CODE (type) == METHOD_TYPE)))
11130 else if (TREE_CODE (declarator) == TEMPLATE_ID_EXPR)
11132 cp_error ("template-id `%D' used as a declarator", declarator);
11133 declarator = dname;
11136 /* Unexpected declarator format. */
11137 my_friendly_abort (990210);
11139 /* If this is declaring a typedef name, return a TYPE_DECL. */
11141 if (RIDBIT_SETP (RID_TYPEDEF, specbits) && decl_context != TYPENAME)
11145 /* Note that the grammar rejects storage classes
11146 in typenames, fields or parameters. */
11147 if (current_lang_name == lang_name_java)
11148 TYPE_FOR_JAVA (type) = 1;
11150 if (decl_context == FIELD)
11152 if (declarator == constructor_name (current_class_type))
11153 cp_pedwarn ("ISO C++ forbids nested type `%D' with same name as enclosing class",
11155 decl = build_lang_decl (TYPE_DECL, declarator, type);
11158 decl = build_decl (TYPE_DECL, declarator, type);
11160 /* If the user declares "typedef struct {...} foo" then the
11161 struct will have an anonymous name. Fill that name in now.
11162 Nothing can refer to it, so nothing needs know about the name
11164 if (type != error_mark_node
11166 && TYPE_NAME (type)
11167 && TREE_CODE (TYPE_NAME (type)) == TYPE_DECL
11168 && ANON_AGGRNAME_P (TYPE_IDENTIFIER (type))
11169 && CP_TYPE_QUALS (type) == TYPE_UNQUALIFIED)
11171 tree oldname = TYPE_NAME (type);
11174 /* Replace the anonymous name with the real name everywhere. */
11175 lookup_tag_reverse (type, declarator);
11176 for (t = TYPE_MAIN_VARIANT (type); t; t = TYPE_NEXT_VARIANT (t))
11177 if (TYPE_NAME (t) == oldname)
11178 TYPE_NAME (t) = decl;
11180 if (TYPE_LANG_SPECIFIC (type))
11181 TYPE_WAS_ANONYMOUS (type) = 1;
11183 /* If this is a typedef within a template class, the nested
11184 type is a (non-primary) template. The name for the
11185 template needs updating as well. */
11186 if (TYPE_LANG_SPECIFIC (type) && CLASSTYPE_TEMPLATE_INFO (type))
11187 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type))
11188 = TYPE_IDENTIFIER (type);
11191 DECL_ASSEMBLER_NAME (decl) = mangle_type (type);
11194 /* XXX Temporarily set the scope.
11195 When returning, start_decl expects it as NULL_TREE,
11196 and will then then set it using pushdecl. */
11197 my_friendly_assert (DECL_CONTEXT (decl) == NULL_TREE, 980404);
11198 if (current_class_type)
11199 DECL_CONTEXT (decl) = current_class_type;
11201 DECL_CONTEXT (decl) = FROB_CONTEXT (current_namespace);
11203 DECL_ASSEMBLER_NAME (decl) = DECL_NAME (decl);
11204 DECL_ASSEMBLER_NAME (decl)
11205 = get_identifier (build_overload_name (type, 1, 1));
11206 DECL_CONTEXT (decl) = NULL_TREE;
11209 /* FIXME remangle member functions; member functions of a
11210 type with external linkage have external linkage. */
11213 if (TREE_CODE (type) == OFFSET_TYPE || TREE_CODE (type) == METHOD_TYPE)
11215 cp_error_at ("typedef name may not be class-qualified", decl);
11220 if (ctype == NULL_TREE)
11222 if (TREE_CODE (type) != METHOD_TYPE)
11223 cp_error_at ("invalid type qualifier for non-member function type", decl);
11225 ctype = TYPE_METHOD_BASETYPE (type);
11227 if (ctype != NULL_TREE)
11228 grok_method_quals (ctype, decl, quals);
11231 if (RIDBIT_SETP (RID_SIGNED, specbits)
11232 || (typedef_decl && C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl)))
11233 C_TYPEDEF_EXPLICITLY_SIGNED (decl) = 1;
11235 bad_specifiers (decl, "type", virtualp, quals != NULL_TREE,
11236 inlinep, friendp, raises != NULL_TREE);
11239 error ("typedef declaration includes an initializer");
11244 /* Detect the case of an array type of unspecified size
11245 which came, as such, direct from a typedef name.
11246 We must copy the type, so that each identifier gets
11247 a distinct type, so that each identifier's size can be
11248 controlled separately by its own initializer. */
11250 if (type == typedef_type && TREE_CODE (type) == ARRAY_TYPE
11251 && TYPE_DOMAIN (type) == NULL_TREE)
11253 type = build_cplus_array_type (TREE_TYPE (type), TYPE_DOMAIN (type));
11256 /* If this is a type name (such as, in a cast or sizeof),
11257 compute the type and return it now. */
11259 if (decl_context == TYPENAME)
11261 /* Note that the grammar rejects storage classes
11262 in typenames, fields or parameters. */
11263 if (type_quals != TYPE_UNQUALIFIED)
11264 type_quals = TYPE_UNQUALIFIED;
11266 /* Special case: "friend class foo" looks like a TYPENAME context. */
11269 if (type_quals != TYPE_UNQUALIFIED)
11271 cp_error ("type qualifiers specified for friend class declaration");
11272 type_quals = TYPE_UNQUALIFIED;
11276 cp_error ("`inline' specified for friend class declaration");
11280 /* Until core issue 180 is resolved, allow 'friend typename A::B'.
11281 But don't allow implicit typenames. */
11282 if (!current_aggr && (TREE_CODE (type) != TYPENAME_TYPE
11283 || IMPLICIT_TYPENAME_P (type)))
11285 if (TREE_CODE (type) == TEMPLATE_TYPE_PARM)
11286 cp_pedwarn ("template parameters cannot be friends");
11287 else if (TREE_CODE (type) == TYPENAME_TYPE)
11289 friend declaration requires class-key, i.e. `friend class %T::%T'",
11290 constructor_name (current_class_type),
11291 TYPE_IDENTIFIER (type));
11294 friend declaration requires class-key, i.e. `friend %#T'",
11298 /* Only try to do this stuff if we didn't already give up. */
11299 if (type != integer_type_node)
11301 /* A friendly class? */
11302 if (current_class_type)
11303 make_friend_class (current_class_type, TYPE_MAIN_VARIANT (type));
11305 cp_error ("trying to make class `%T' a friend of global scope",
11307 type = void_type_node;
11312 if (ctype == NULL_TREE)
11314 if (TREE_CODE (type) != METHOD_TYPE)
11315 cp_error ("invalid qualifiers on non-member function type");
11317 ctype = TYPE_METHOD_BASETYPE (type);
11321 tree dummy = build_decl (TYPE_DECL, declarator, type);
11322 grok_method_quals (ctype, dummy, quals);
11323 type = TREE_TYPE (dummy);
11329 else if (declarator == NULL_TREE && decl_context != PARM
11330 && decl_context != CATCHPARM
11331 && TREE_CODE (type) != UNION_TYPE
11334 cp_error ("abstract declarator `%T' used as declaration", type);
11335 declarator = make_anon_name ();
11338 /* `void' at top level (not within pointer)
11339 is allowed only in typedefs or type names.
11340 We don't complain about parms either, but that is because
11341 a better error message can be made later. */
11343 if (TREE_CODE (type) == VOID_TYPE && decl_context != PARM)
11346 error ("unnamed variable or field declared void");
11347 else if (TREE_CODE (declarator) == IDENTIFIER_NODE)
11349 if (IDENTIFIER_OPNAME_P (declarator))
11350 my_friendly_abort (356);
11352 error ("variable or field `%s' declared void", name);
11355 error ("variable or field declared void");
11356 type = integer_type_node;
11359 /* Now create the decl, which may be a VAR_DECL, a PARM_DECL
11360 or a FUNCTION_DECL, depending on DECL_CONTEXT and TYPE. */
11362 if (decl_context == PARM || decl_context == CATCHPARM)
11364 if (ctype || in_namespace)
11365 error ("cannot use `::' in parameter declaration");
11367 /* A parameter declared as an array of T is really a pointer to T.
11368 One declared as a function is really a pointer to a function.
11369 One declared as a member is really a pointer to member. */
11371 if (TREE_CODE (type) == ARRAY_TYPE)
11373 /* Transfer const-ness of array into that of type pointed to. */
11374 type = build_pointer_type (TREE_TYPE (type));
11375 type_quals = TYPE_UNQUALIFIED;
11377 else if (TREE_CODE (type) == FUNCTION_TYPE)
11378 type = build_pointer_type (type);
11379 else if (TREE_CODE (type) == OFFSET_TYPE)
11380 type = build_pointer_type (type);
11381 else if (TREE_CODE (type) == VOID_TYPE && declarator)
11383 error ("declaration of `%s' as void", name);
11389 register tree decl;
11391 if (decl_context == PARM)
11393 decl = build_decl (PARM_DECL, declarator, type);
11395 bad_specifiers (decl, "parameter", virtualp, quals != NULL_TREE,
11396 inlinep, friendp, raises != NULL_TREE);
11398 /* Compute the type actually passed in the parmlist,
11399 for the case where there is no prototype.
11400 (For example, shorts and chars are passed as ints.)
11401 When there is a prototype, this is overridden later. */
11403 DECL_ARG_TYPE (decl) = type_promotes_to (type);
11405 else if (decl_context == FIELD)
11407 if (type == error_mark_node)
11409 /* Happens when declaring arrays of sizes which
11410 are error_mark_node, for example. */
11413 else if (in_namespace && !friendp)
11415 /* Something like struct S { int N::j; }; */
11416 cp_error ("invalid use of `::'");
11419 else if (TREE_CODE (type) == FUNCTION_TYPE)
11422 tree function_context;
11424 /* We catch the others as conflicts with the builtin
11426 if (friendp && declarator == ridpointers[(int) RID_SIGNED])
11428 cp_error ("function `%D' cannot be declared friend",
11435 if (ctype == NULL_TREE)
11436 ctype = current_class_type;
11438 if (ctype == NULL_TREE)
11440 cp_error ("can't make `%D' into a method -- not in a class",
11442 return void_type_node;
11445 /* ``A union may [ ... ] not [ have ] virtual functions.''
11447 if (virtualp && TREE_CODE (ctype) == UNION_TYPE)
11449 cp_error ("function `%D' declared virtual inside a union",
11451 return void_type_node;
11454 if (declarator == ansi_opname (NEW_EXPR)
11455 || declarator == ansi_opname (VEC_NEW_EXPR)
11456 || declarator == ansi_opname (DELETE_EXPR)
11457 || declarator == ansi_opname (VEC_DELETE_EXPR))
11461 cp_error ("`%D' cannot be declared virtual, since it is always static",
11466 else if (staticp < 2)
11467 type = build_cplus_method_type (ctype, TREE_TYPE (type),
11468 TYPE_ARG_TYPES (type));
11471 /* Tell grokfndecl if it needs to set TREE_PUBLIC on the node. */
11472 function_context = (ctype != NULL_TREE) ?
11473 decl_function_context (TYPE_MAIN_DECL (ctype)) : NULL_TREE;
11474 publicp = (! friendp || ! staticp)
11475 && function_context == NULL_TREE;
11476 decl = grokfndecl (ctype, type,
11477 TREE_CODE (declarator) != TEMPLATE_ID_EXPR
11478 ? declarator : dname,
11480 virtualp, flags, quals, raises,
11481 friendp ? -1 : 0, friendp, publicp, inlinep,
11482 funcdef_flag, template_count, in_namespace);
11483 if (decl == NULL_TREE)
11486 /* This clobbers the attrs stored in `decl' from `attrlist'. */
11487 /* The decl and setting of decl_machine_attr is also turned off. */
11488 decl = build_decl_attribute_variant (decl, decl_machine_attr);
11491 /* [class.conv.ctor]
11493 A constructor declared without the function-specifier
11494 explicit that can be called with a single parameter
11495 specifies a conversion from the type of its first
11496 parameter to the type of its class. Such a constructor
11497 is called a converting constructor. */
11498 if (explicitp == 2)
11499 DECL_NONCONVERTING_P (decl) = 1;
11500 else if (DECL_CONSTRUCTOR_P (decl))
11502 /* The constructor can be called with exactly one
11503 parameter if there is at least one parameter, and
11504 any subsequent parameters have default arguments.
11505 We don't look at the first parameter, which is
11506 really just the `this' parameter for the new
11509 TREE_CHAIN (TYPE_ARG_TYPES (TREE_TYPE (decl)));
11511 /* Skip the `in_chrg' argument too, if present. */
11512 if (DECL_HAS_IN_CHARGE_PARM_P (decl))
11513 arg_types = TREE_CHAIN (arg_types);
11515 if (arg_types == void_list_node
11517 && TREE_CHAIN (arg_types)
11518 && TREE_CHAIN (arg_types) != void_list_node
11519 && !TREE_PURPOSE (TREE_CHAIN (arg_types))))
11520 DECL_NONCONVERTING_P (decl) = 1;
11523 else if (TREE_CODE (type) == METHOD_TYPE)
11525 /* We only get here for friend declarations of
11526 members of other classes. */
11527 /* All method decls are public, so tell grokfndecl to set
11528 TREE_PUBLIC, also. */
11529 decl = grokfndecl (ctype, type, declarator, declarator,
11530 virtualp, flags, quals, raises,
11531 friendp ? -1 : 0, friendp, 1, 0, funcdef_flag,
11532 template_count, in_namespace);
11533 if (decl == NULL_TREE)
11536 else if (!staticp && ! processing_template_decl
11537 && !COMPLETE_TYPE_P (complete_type (type))
11538 && (TREE_CODE (type) != ARRAY_TYPE || initialized == 0))
11541 cp_error ("field `%D' has incomplete type", declarator);
11543 cp_error ("name `%T' has incomplete type", type);
11545 /* If we're instantiating a template, tell them which
11546 instantiation made the field's type be incomplete. */
11547 if (current_class_type
11548 && TYPE_NAME (current_class_type)
11549 && IDENTIFIER_TEMPLATE (TYPE_IDENTIFIER (current_class_type))
11550 && declspecs && TREE_VALUE (declspecs)
11551 && TREE_TYPE (TREE_VALUE (declspecs)) == type)
11552 cp_error (" in instantiation of template `%T'",
11553 current_class_type);
11555 type = error_mark_node;
11562 error ("`%s' is neither function nor member function; cannot be declared friend",
11563 IDENTIFIER_POINTER (declarator));
11571 /* Friends are treated specially. */
11572 if (ctype == current_class_type)
11573 warning ("member functions are implicitly friends of their class");
11576 tree t = NULL_TREE;
11577 if (decl && DECL_NAME (decl))
11579 if (template_class_depth (current_class_type) == 0)
11582 = check_explicit_specialization
11584 template_count, 2 * (funcdef_flag != 0) + 4);
11585 if (decl == error_mark_node)
11586 return error_mark_node;
11589 t = do_friend (ctype, declarator, decl,
11590 last_function_parms, attrlist, flags, quals,
11593 if (t && funcdef_flag)
11596 return void_type_node;
11600 /* Structure field. It may not be a function, except for C++ */
11602 if (decl == NULL_TREE)
11608 /* An attempt is being made to initialize a non-static
11609 member. But, from [class.mem]:
11611 4 A member-declarator can contain a
11612 constant-initializer only if it declares a static
11613 member (_class.static_) of integral or enumeration
11614 type, see _class.static.data_.
11616 This used to be relatively common practice, but
11617 the rest of the compiler does not correctly
11618 handle the initialization unless the member is
11619 static so we make it static below. */
11620 cp_pedwarn ("ISO C++ forbids initialization of member `%D'",
11622 cp_pedwarn ("making `%D' static", declarator);
11626 if (uses_template_parms (type))
11627 /* We'll check at instantiation time. */
11629 else if (check_static_variable_definition (declarator,
11631 /* If we just return the declaration, crashes
11632 will sometimes occur. We therefore return
11633 void_type_node, as if this was a friend
11634 declaration, to cause callers to completely
11635 ignore this declaration. */
11636 return void_type_node;
11639 /* 9.2p13 [class.mem] */
11640 if (declarator == constructor_name (current_class_type)
11641 /* The standard does not allow non-static data members
11642 here either, but we agreed at the 10/99 meeting
11643 to change that in TC 1 so that they are allowed in
11644 classes with no user-defined constructors. */
11646 cp_pedwarn ("ISO C++ forbids static data member `%D' with same name as enclosing class",
11651 /* C++ allows static class members. All other work
11652 for this is done by grokfield. */
11653 decl = build_lang_decl (VAR_DECL, declarator, type);
11654 TREE_STATIC (decl) = 1;
11655 /* In class context, 'static' means public access. */
11656 TREE_PUBLIC (decl) = DECL_EXTERNAL (decl) = 1;
11660 decl = build_decl (FIELD_DECL, declarator, type);
11661 DECL_NONADDRESSABLE_P (decl) = bitfield;
11662 if (RIDBIT_SETP (RID_MUTABLE, specbits))
11664 DECL_MUTABLE_P (decl) = 1;
11665 RIDBIT_RESET (RID_MUTABLE, specbits);
11669 bad_specifiers (decl, "field", virtualp, quals != NULL_TREE,
11670 inlinep, friendp, raises != NULL_TREE);
11673 else if (TREE_CODE (type) == FUNCTION_TYPE || TREE_CODE (type) == METHOD_TYPE)
11675 tree original_name;
11681 if (TREE_CODE (declarator) == TEMPLATE_ID_EXPR)
11682 original_name = dname;
11684 original_name = declarator;
11686 if (RIDBIT_SETP (RID_AUTO, specbits))
11687 error ("storage class `auto' invalid for function `%s'", name);
11688 else if (RIDBIT_SETP (RID_REGISTER, specbits))
11689 error ("storage class `register' invalid for function `%s'", name);
11691 /* Function declaration not at top level.
11692 Storage classes other than `extern' are not allowed
11693 and `extern' makes no difference. */
11694 if (! toplevel_bindings_p ()
11695 && (RIDBIT_SETP (RID_STATIC, specbits)
11696 || RIDBIT_SETP (RID_INLINE, specbits))
11699 if (RIDBIT_SETP (RID_STATIC, specbits))
11700 pedwarn ("storage class `static' invalid for function `%s' declared out of global scope", name);
11702 pedwarn ("storage class `inline' invalid for function `%s' declared out of global scope", name);
11705 if (ctype == NULL_TREE)
11709 error ("virtual non-class function `%s'", name);
11713 else if (TREE_CODE (type) == FUNCTION_TYPE && staticp < 2)
11714 type = build_cplus_method_type (ctype, TREE_TYPE (type),
11715 TYPE_ARG_TYPES (type));
11717 /* Record presence of `static'. */
11718 publicp = (ctype != NULL_TREE
11719 || RIDBIT_SETP (RID_EXTERN, specbits)
11720 || !RIDBIT_SETP (RID_STATIC, specbits));
11722 decl = grokfndecl (ctype, type, original_name, declarator,
11723 virtualp, flags, quals, raises,
11725 publicp, inlinep, funcdef_flag,
11726 template_count, in_namespace);
11727 if (decl == NULL_TREE)
11732 int illegal_static = 0;
11734 /* Don't allow a static member function in a class, and forbid
11735 declaring main to be static. */
11736 if (TREE_CODE (type) == METHOD_TYPE)
11738 cp_pedwarn ("cannot declare member function `%D' to have static linkage", decl);
11739 illegal_static = 1;
11741 else if (current_function_decl)
11743 /* FIXME need arm citation */
11744 error ("cannot declare static function inside another function");
11745 illegal_static = 1;
11748 if (illegal_static)
11751 RIDBIT_RESET (RID_STATIC, specbits);
11757 /* It's a variable. */
11759 /* An uninitialized decl with `extern' is a reference. */
11760 decl = grokvardecl (type, declarator, &specbits,
11762 (type_quals & TYPE_QUAL_CONST) != 0,
11764 bad_specifiers (decl, "variable", virtualp, quals != NULL_TREE,
11765 inlinep, friendp, raises != NULL_TREE);
11769 DECL_CONTEXT (decl) = ctype;
11772 cp_pedwarn ("static member `%D' re-declared as static", decl);
11774 RIDBIT_RESET (RID_STATIC, specbits);
11776 if (RIDBIT_SETP (RID_REGISTER, specbits) && TREE_STATIC (decl))
11778 cp_error ("static member `%D' declared `register'", decl);
11779 RIDBIT_RESET (RID_REGISTER, specbits);
11781 if (RIDBIT_SETP (RID_EXTERN, specbits) && pedantic)
11783 cp_pedwarn ("cannot explicitly declare member `%#D' to have extern linkage",
11785 RIDBIT_RESET (RID_EXTERN, specbits);
11790 my_friendly_assert (!RIDBIT_SETP (RID_MUTABLE, specbits), 19990927);
11792 /* Record `register' declaration for warnings on &
11793 and in case doing stupid register allocation. */
11795 if (RIDBIT_SETP (RID_REGISTER, specbits))
11796 DECL_REGISTER (decl) = 1;
11798 if (RIDBIT_SETP (RID_EXTERN, specbits))
11799 DECL_THIS_EXTERN (decl) = 1;
11801 if (RIDBIT_SETP (RID_STATIC, specbits))
11802 DECL_THIS_STATIC (decl) = 1;
11804 /* Record constancy and volatility. There's no need to do this
11805 when processing a template; we'll do this for the instantiated
11806 declaration based on the type of DECL. */
11807 if (!processing_template_decl)
11808 c_apply_type_quals_to_decl (type_quals, decl);
11814 /* Tell if a parmlist/exprlist looks like an exprlist or a parmlist.
11815 An empty exprlist is a parmlist. An exprlist which
11816 contains only identifiers at the global level
11817 is a parmlist. Otherwise, it is an exprlist. */
11820 parmlist_is_exprlist (exprs)
11823 if (exprs == NULL_TREE || TREE_PARMLIST (exprs))
11826 if (toplevel_bindings_p ())
11828 /* At the global level, if these are all identifiers,
11829 then it is a parmlist. */
11832 if (TREE_CODE (TREE_VALUE (exprs)) != IDENTIFIER_NODE)
11834 exprs = TREE_CHAIN (exprs);
11841 /* Subroutine of start_function. Ensure that each of the parameter
11842 types (as listed in PARMS) is complete, as is required for a
11843 function definition. */
11846 require_complete_types_for_parms (parms)
11849 for (; parms; parms = TREE_CHAIN (parms))
11851 tree type = TREE_TYPE (parms);
11853 /* Try to complete the TYPE. */
11854 type = complete_type (type);
11856 if (type == error_mark_node)
11859 if (!COMPLETE_TYPE_P (type))
11861 if (DECL_NAME (parms))
11862 error ("parameter `%s' has incomplete type",
11863 IDENTIFIER_POINTER (DECL_NAME (parms)));
11865 error ("parameter has incomplete type");
11866 TREE_TYPE (parms) = error_mark_node;
11869 layout_decl (parms, 0);
11873 /* Returns non-zero if T is a local variable. */
11876 local_variable_p (t)
11879 if ((TREE_CODE (t) == VAR_DECL
11880 /* A VAR_DECL with a context that is a _TYPE is a static data
11882 && !TYPE_P (CP_DECL_CONTEXT (t))
11883 /* Any other non-local variable must be at namespace scope. */
11884 && !DECL_NAMESPACE_SCOPE_P (t))
11885 || (TREE_CODE (t) == PARM_DECL))
11891 /* Returns non-zero if T is an automatic local variable or a label.
11892 (These are the declarations that need to be remapped when the code
11893 containing them is duplicated.) */
11896 nonstatic_local_decl_p (t)
11899 return ((local_variable_p (t) && !TREE_STATIC (t))
11900 || TREE_CODE (t) == LABEL_DECL
11901 || TREE_CODE (t) == RESULT_DECL);
11904 /* Like local_variable_p, but suitable for use as a tree-walking
11908 local_variable_p_walkfn (tp, walk_subtrees, data)
11910 int *walk_subtrees ATTRIBUTE_UNUSED;
11911 void *data ATTRIBUTE_UNUSED;
11913 return ((local_variable_p (*tp) && !DECL_ARTIFICIAL (*tp))
11914 ? *tp : NULL_TREE);
11917 /* Check that ARG, which is a default-argument expression for a
11918 parameter DECL, is legal. Returns ARG, or ERROR_MARK_NODE, if
11919 something goes wrong. DECL may also be a _TYPE node, rather than a
11920 DECL, if there is no DECL available. */
11923 check_default_argument (decl, arg)
11930 if (TREE_CODE (arg) == DEFAULT_ARG)
11931 /* We get a DEFAULT_ARG when looking at an in-class declaration
11932 with a default argument. Ignore the argument for now; we'll
11933 deal with it after the class is complete. */
11936 if (processing_template_decl || uses_template_parms (arg))
11937 /* We don't do anything checking until instantiation-time. Note
11938 that there may be uninstantiated arguments even for an
11939 instantiated function, since default arguments are not
11940 instantiated until they are needed. */
11949 decl_type = TREE_TYPE (decl);
11951 if (arg == error_mark_node
11952 || decl == error_mark_node
11953 || TREE_TYPE (arg) == error_mark_node
11954 || decl_type == error_mark_node)
11955 /* Something already went wrong. There's no need to check
11957 return error_mark_node;
11959 /* [dcl.fct.default]
11961 A default argument expression is implicitly converted to the
11963 if (!TREE_TYPE (arg)
11964 || !can_convert_arg (decl_type, TREE_TYPE (arg), arg))
11967 cp_error ("default argument for `%#D' has type `%T'",
11968 decl, TREE_TYPE (arg));
11970 cp_error ("default argument for parameter of type `%T' has type `%T'",
11971 decl_type, TREE_TYPE (arg));
11973 return error_mark_node;
11976 /* [dcl.fct.default]
11978 Local variables shall not be used in default argument
11981 The keyword `this' shall not be used in a default argument of a
11982 member function. */
11983 var = walk_tree_without_duplicates (&arg, local_variable_p_walkfn,
11987 cp_error ("default argument `%E' uses local variable `%D'",
11989 return error_mark_node;
11996 /* Decode the list of parameter types for a function type.
11997 Given the list of things declared inside the parens,
11998 return a list of types.
12000 The list we receive can have three kinds of elements:
12001 an IDENTIFIER_NODE for names given without types,
12002 a TREE_LIST node for arguments given as typespecs or names with typespecs,
12003 or void_type_node, to mark the end of an argument list
12004 when additional arguments are not permitted (... was not used).
12006 FUNCDEF_FLAG is nonzero for a function definition, 0 for
12007 a mere declaration. A nonempty identifier-list gets an error message
12008 when FUNCDEF_FLAG is zero.
12009 If FUNCDEF_FLAG is 1, then parameter types must be complete.
12010 If FUNCDEF_FLAG is -1, then parameter types may be incomplete.
12012 If all elements of the input list contain types,
12013 we return a list of the types.
12014 If all elements contain no type (except perhaps a void_type_node
12015 at the end), we return a null list.
12016 If some have types and some do not, it is an error, and we
12017 return a null list.
12019 Also set last_function_parms to either
12020 a list of names (IDENTIFIER_NODEs) or a chain of PARM_DECLs.
12021 A list of names is converted to a chain of PARM_DECLs
12022 by store_parm_decls so that ultimately it is always a chain of decls.
12024 Note that in C++, parameters can take default values. These default
12025 values are in the TREE_PURPOSE field of the TREE_LIST. It is
12026 an error to specify default values which are followed by parameters
12027 that have no default values, or an ELLIPSES. For simplicities sake,
12028 only parameters which are specified with their types can take on
12032 grokparms (first_parm, funcdef_flag)
12036 tree result = NULL_TREE;
12037 tree decls = NULL_TREE;
12039 if (first_parm != NULL_TREE
12040 && TREE_CODE (TREE_VALUE (first_parm)) == IDENTIFIER_NODE)
12042 if (! funcdef_flag)
12043 pedwarn ("parameter names (without types) in function declaration");
12044 last_function_parms = first_parm;
12047 else if (first_parm != NULL_TREE
12048 && TREE_CODE (TREE_VALUE (first_parm)) != TREE_LIST
12049 && TREE_CODE (TREE_VALUE (first_parm)) != VOID_TYPE)
12050 my_friendly_abort (145);
12053 /* Types were specified. This is a list of declarators
12054 each represented as a TREE_LIST node. */
12055 register tree parm, chain;
12056 int any_init = 0, any_error = 0;
12058 if (first_parm != NULL_TREE)
12060 tree last_result = NULL_TREE;
12061 tree last_decl = NULL_TREE;
12063 for (parm = first_parm; parm != NULL_TREE; parm = chain)
12065 tree type = NULL_TREE, list_node = parm;
12066 register tree decl = TREE_VALUE (parm);
12067 tree init = TREE_PURPOSE (parm);
12069 chain = TREE_CHAIN (parm);
12070 /* @@ weak defense against parse errors. */
12071 if (TREE_CODE (decl) != VOID_TYPE
12072 && TREE_CODE (decl) != TREE_LIST)
12074 /* Give various messages as the need arises. */
12075 if (TREE_CODE (decl) == STRING_CST)
12076 cp_error ("invalid string constant `%E'", decl);
12077 else if (TREE_CODE (decl) == INTEGER_CST)
12078 error ("invalid integer constant in parameter list, did you forget to give parameter name?");
12082 if (TREE_CODE (decl) != VOID_TYPE)
12084 decl = grokdeclarator (TREE_VALUE (decl),
12085 TREE_PURPOSE (decl),
12086 PARM, init != NULL_TREE,
12088 if (! decl || TREE_TYPE (decl) == error_mark_node)
12091 /* Top-level qualifiers on the parameters are
12092 ignored for function types. */
12093 type = TYPE_MAIN_VARIANT (TREE_TYPE (decl));
12095 if (TREE_CODE (type) == VOID_TYPE)
12096 decl = void_type_node;
12097 else if (TREE_CODE (type) == METHOD_TYPE)
12099 if (DECL_NAME (decl))
12100 /* Cannot use the decl here because
12101 we don't have DECL_CONTEXT set up yet. */
12102 cp_error ("parameter `%D' invalidly declared method type",
12105 error ("parameter invalidly declared method type");
12106 type = build_pointer_type (type);
12107 TREE_TYPE (decl) = type;
12109 else if (TREE_CODE (type) == OFFSET_TYPE)
12111 if (DECL_NAME (decl))
12112 cp_error ("parameter `%D' invalidly declared offset type",
12115 error ("parameter invalidly declared offset type");
12116 type = build_pointer_type (type);
12117 TREE_TYPE (decl) = type;
12119 else if (abstract_virtuals_error (decl, type))
12120 any_error = 1; /* Seems like a good idea. */
12121 else if (POINTER_TYPE_P (type))
12124 while (POINTER_TYPE_P (t)
12125 || (TREE_CODE (t) == ARRAY_TYPE
12126 && TYPE_DOMAIN (t) != NULL_TREE))
12128 if (TREE_CODE (t) == ARRAY_TYPE)
12129 cp_error ("parameter type `%T' includes %s to array of unknown bound",
12131 TYPE_PTR_P (type) ? "pointer" : "reference");
12135 if (TREE_CODE (decl) == VOID_TYPE)
12137 if (result == NULL_TREE)
12139 result = void_list_node;
12140 last_result = result;
12144 TREE_CHAIN (last_result) = void_list_node;
12145 last_result = void_list_node;
12148 && (chain != void_list_node || TREE_CHAIN (chain)))
12149 error ("`void' in parameter list must be entire list");
12153 /* Since there is a prototype, args are passed in their own types. */
12154 DECL_ARG_TYPE (decl) = TREE_TYPE (decl);
12155 if (PROMOTE_PROTOTYPES
12156 && (TREE_CODE (type) == INTEGER_TYPE
12157 || TREE_CODE (type) == ENUMERAL_TYPE)
12158 && TYPE_PRECISION (type) < TYPE_PRECISION (integer_type_node))
12159 DECL_ARG_TYPE (decl) = integer_type_node;
12160 if (!any_error && init)
12163 init = check_default_argument (decl, init);
12168 if (decls == NULL_TREE)
12175 TREE_CHAIN (last_decl) = decl;
12178 list_node = tree_cons (init, type, NULL_TREE);
12179 if (result == NULL_TREE)
12181 result = list_node;
12182 last_result = result;
12186 TREE_CHAIN (last_result) = list_node;
12187 last_result = list_node;
12191 TREE_CHAIN (last_result) = NULL_TREE;
12192 /* If there are no parameters, and the function does not end
12193 with `...', then last_decl will be NULL_TREE. */
12194 if (last_decl != NULL_TREE)
12195 TREE_CHAIN (last_decl) = NULL_TREE;
12199 last_function_parms = decls;
12204 /* Called from the parser to update an element of TYPE_ARG_TYPES for some
12205 FUNCTION_TYPE with the newly parsed version of its default argument, which
12206 was previously digested as text. See snarf_defarg et al in lex.c. */
12209 replace_defarg (arg, init)
12212 if (! processing_template_decl
12213 && ! can_convert_arg (TREE_VALUE (arg), TREE_TYPE (init), init))
12214 cp_pedwarn ("invalid type `%T' for default argument to `%T'",
12215 TREE_TYPE (init), TREE_VALUE (arg));
12216 TREE_PURPOSE (arg) = init;
12219 /* D is a constructor or overloaded `operator='. Returns non-zero if
12220 D's arguments allow it to be a copy constructor, or copy assignment
12229 if (!DECL_FUNCTION_MEMBER_P (d))
12232 t = FUNCTION_ARG_CHAIN (d);
12233 if (DECL_CONSTRUCTOR_P (d) && DECL_HAS_IN_CHARGE_PARM_P (d))
12234 t = TREE_CHAIN (t);
12235 if (t && TREE_CODE (TREE_VALUE (t)) == REFERENCE_TYPE
12236 && (TYPE_MAIN_VARIANT (TREE_TYPE (TREE_VALUE (t)))
12237 == DECL_CONTEXT (d))
12238 && (TREE_CHAIN (t) == NULL_TREE
12239 || TREE_CHAIN (t) == void_list_node
12240 || TREE_PURPOSE (TREE_CHAIN (t))))
12245 /* These memoizing functions keep track of special properties which
12246 a class may have. `grok_ctor_properties' notices whether a class
12247 has a constructor of the form X(X&), and also complains
12248 if the class has a constructor of the form X(X).
12249 `grok_op_properties' takes notice of the various forms of
12250 operator= which are defined, as well as what sorts of type conversion
12251 may apply. Both functions take a FUNCTION_DECL as an argument. */
12254 grok_ctor_properties (ctype, decl)
12257 tree parmtypes = FUNCTION_ARG_CHAIN (decl);
12258 tree parmtype = parmtypes ? TREE_VALUE (parmtypes) : void_type_node;
12260 /* When a type has virtual baseclasses, a magical first int argument is
12261 added to any ctor so we can tell if the class has been initialized
12262 yet. This could screw things up in this function, so we deliberately
12263 ignore the leading int if we're in that situation. */
12264 if (DECL_HAS_IN_CHARGE_PARM_P (decl))
12266 my_friendly_assert (parmtypes
12267 && TREE_VALUE (parmtypes) == integer_type_node,
12269 parmtypes = TREE_CHAIN (parmtypes);
12270 parmtype = TREE_VALUE (parmtypes);
12275 A non-template constructor for class X is a copy constructor if
12276 its first parameter is of type X&, const X&, volatile X& or const
12277 volatile X&, and either there are no other parameters or else all
12278 other parameters have default arguments. */
12279 if (TREE_CODE (parmtype) == REFERENCE_TYPE
12280 && TYPE_MAIN_VARIANT (TREE_TYPE (parmtype)) == ctype
12281 && (TREE_CHAIN (parmtypes) == NULL_TREE
12282 || TREE_CHAIN (parmtypes) == void_list_node
12283 || TREE_PURPOSE (TREE_CHAIN (parmtypes)))
12284 && !(DECL_TEMPLATE_INSTANTIATION (decl)
12285 && is_member_template (DECL_TI_TEMPLATE (decl))))
12287 TYPE_HAS_INIT_REF (ctype) = 1;
12288 if (CP_TYPE_CONST_P (TREE_TYPE (parmtype)))
12289 TYPE_HAS_CONST_INIT_REF (ctype) = 1;
12293 A declaration of a constructor for a class X is ill-formed if its
12294 first parameter is of type (optionally cv-qualified) X and either
12295 there are no other parameters or else all other parameters have
12298 We *don't* complain about member template instantiations that
12299 have this form, though; they can occur as we try to decide what
12300 constructor to use during overload resolution. Since overload
12301 resolution will never prefer such a constructor to the
12302 non-template copy constructor (which is either explicitly or
12303 implicitly defined), there's no need to worry about their
12304 existence. Theoretically, they should never even be
12305 instantiated, but that's hard to forestall. */
12306 else if (TYPE_MAIN_VARIANT (parmtype) == ctype
12307 && (TREE_CHAIN (parmtypes) == NULL_TREE
12308 || TREE_CHAIN (parmtypes) == void_list_node
12309 || TREE_PURPOSE (TREE_CHAIN (parmtypes)))
12310 && !(DECL_TEMPLATE_INSTANTIATION (decl)
12311 && is_member_template (DECL_TI_TEMPLATE (decl))))
12313 cp_error ("invalid constructor; you probably meant `%T (const %T&)'",
12315 SET_IDENTIFIER_ERROR_LOCUS (DECL_NAME (decl), ctype);
12318 else if (TREE_CODE (parmtype) == VOID_TYPE
12319 || TREE_PURPOSE (parmtypes) != NULL_TREE)
12320 TYPE_HAS_DEFAULT_CONSTRUCTOR (ctype) = 1;
12325 /* An operator with this code is unary, but can also be binary. */
12329 enum tree_code code;
12331 return (code == INDIRECT_REF
12332 || code == ADDR_EXPR
12333 || code == CONVERT_EXPR
12334 || code == NEGATE_EXPR
12335 || code == PREINCREMENT_EXPR
12336 || code == PREDECREMENT_EXPR);
12339 /* An operator with this name can only be unary. */
12343 enum tree_code code;
12345 return (code == TRUTH_NOT_EXPR
12346 || code == BIT_NOT_EXPR
12347 || code == COMPONENT_REF
12348 || code == TYPE_EXPR);
12351 /* Do a little sanity-checking on how they declared their operator. */
12354 grok_op_properties (decl, virtualp, friendp)
12356 int virtualp, friendp;
12358 tree argtypes = TYPE_ARG_TYPES (TREE_TYPE (decl));
12360 int methodp = (TREE_CODE (TREE_TYPE (decl)) == METHOD_TYPE);
12361 tree name = DECL_NAME (decl);
12362 enum tree_code operator_code;
12365 /* Count the number of arguments. */
12366 for (argtype = argtypes, arity = 0;
12367 argtype && argtype != void_list_node;
12368 argtype = TREE_CHAIN (argtype))
12371 if (current_class_type == NULL_TREE)
12374 if (DECL_CONV_FN_P (decl))
12375 operator_code = TYPE_EXPR;
12379 #define DEF_OPERATOR(NAME, CODE, NEW_MANGLING, OLD_MANGING, ARITY, ASSN_P) \
12380 if (ansi_opname (CODE) == name) \
12382 operator_code = CODE; \
12385 else if (ansi_assopname (CODE) == name) \
12387 operator_code = CODE; \
12388 DECL_ASSIGNMENT_OPERATOR_P (decl) = 1; \
12392 #include "operators.def"
12393 #undef DEF_OPERATOR
12395 my_friendly_abort (20000527);
12398 my_friendly_assert (operator_code != LAST_CPLUS_TREE_CODE, 20000526);
12399 SET_OVERLOADED_OPERATOR_CODE (decl, operator_code);
12403 switch (operator_code)
12406 TYPE_OVERLOADS_CALL_EXPR (current_class_type) = 1;
12410 TYPE_OVERLOADS_ARRAY_REF (current_class_type) = 1;
12413 case COMPONENT_REF:
12415 TYPE_OVERLOADS_ARROW (current_class_type) = 1;
12419 TYPE_HAS_NEW_OPERATOR (current_class_type) = 1;
12423 TYPE_GETS_DELETE (current_class_type) |= 1;
12427 TYPE_HAS_ARRAY_NEW_OPERATOR (current_class_type) = 1;
12430 case VEC_DELETE_EXPR:
12431 TYPE_GETS_DELETE (current_class_type) |= 2;
12439 if (operator_code == NEW_EXPR || operator_code == VEC_NEW_EXPR)
12441 /* When the compiler encounters the definition of A::operator new, it
12442 doesn't look at the class declaration to find out if it's static. */
12444 revert_static_member_fn (decl);
12446 /* Take care of function decl if we had syntax errors. */
12447 if (argtypes == NULL_TREE)
12449 = build_function_type (ptr_type_node,
12450 hash_tree_chain (integer_type_node,
12453 TREE_TYPE (decl) = coerce_new_type (TREE_TYPE (decl));
12455 else if (operator_code == DELETE_EXPR || operator_code == VEC_DELETE_EXPR)
12458 revert_static_member_fn (decl);
12460 if (argtypes == NULL_TREE)
12462 = build_function_type (void_type_node,
12463 hash_tree_chain (ptr_type_node,
12466 TREE_TYPE (decl) = coerce_delete_type (TREE_TYPE (decl));
12470 /* An operator function must either be a non-static member function
12471 or have at least one parameter of a class, a reference to a class,
12472 an enumeration, or a reference to an enumeration. 13.4.0.6 */
12473 if (! methodp || DECL_STATIC_FUNCTION_P (decl))
12475 if (operator_code == TYPE_EXPR
12476 || operator_code == CALL_EXPR
12477 || operator_code == COMPONENT_REF
12478 || operator_code == ARRAY_REF
12479 || operator_code == NOP_EXPR)
12480 cp_error ("`%D' must be a nonstatic member function", decl);
12485 if (DECL_STATIC_FUNCTION_P (decl))
12486 cp_error ("`%D' must be either a non-static member function or a non-member function", decl);
12489 for (; TREE_CODE (TREE_VALUE (p)) != VOID_TYPE ; p = TREE_CHAIN (p))
12491 tree arg = TREE_VALUE (p);
12492 if (TREE_CODE (arg) == REFERENCE_TYPE)
12493 arg = TREE_TYPE (arg);
12495 /* This lets bad template code slip through. */
12496 if (IS_AGGR_TYPE (arg)
12497 || TREE_CODE (arg) == ENUMERAL_TYPE
12498 || TREE_CODE (arg) == TEMPLATE_TYPE_PARM
12499 || TREE_CODE (arg) == BOUND_TEMPLATE_TEMPLATE_PARM)
12503 ("`%D' must have an argument of class or enumerated type",
12510 if (operator_code == CALL_EXPR)
12511 return; /* No restrictions on args. */
12513 if (IDENTIFIER_TYPENAME_P (name) && ! DECL_TEMPLATE_INFO (decl))
12515 tree t = TREE_TYPE (name);
12518 int ref = (TREE_CODE (t) == REFERENCE_TYPE);
12519 const char *what = 0;
12522 t = TYPE_MAIN_VARIANT (TREE_TYPE (t));
12524 if (TREE_CODE (t) == VOID_TYPE)
12526 else if (t == current_class_type)
12527 what = "the same type";
12528 /* Don't force t to be complete here. */
12529 else if (IS_AGGR_TYPE (t)
12530 && COMPLETE_TYPE_P (t)
12531 && DERIVED_FROM_P (t, current_class_type))
12532 what = "a base class";
12535 warning ("conversion to %s%s will never use a type conversion operator",
12536 ref ? "a reference to " : "", what);
12540 if (DECL_ASSIGNMENT_OPERATOR_P (decl)
12541 && operator_code == NOP_EXPR)
12545 if (arity != 2 && methodp)
12547 cp_error ("`%D' must take exactly one argument", decl);
12550 parmtype = TREE_VALUE (TREE_CHAIN (argtypes));
12554 A user-declared copy assignment operator X::operator= is
12555 a non-static non-template member function of class X with
12556 exactly one parameter of type X, X&, const X&, volatile
12557 X& or const volatile X&. */
12558 if (copy_assignment_arg_p (parmtype, virtualp)
12559 && !(DECL_TEMPLATE_INSTANTIATION (decl)
12560 && is_member_template (DECL_TI_TEMPLATE (decl)))
12563 TYPE_HAS_ASSIGN_REF (current_class_type) = 1;
12564 if (TREE_CODE (parmtype) != REFERENCE_TYPE
12565 || CP_TYPE_CONST_P (TREE_TYPE (parmtype)))
12566 TYPE_HAS_CONST_ASSIGN_REF (current_class_type) = 1;
12569 else if (operator_code == COND_EXPR)
12572 cp_error ("ISO C++ prohibits overloading operator ?:");
12574 else if (ambi_op_p (operator_code))
12577 /* We pick the one-argument operator codes by default, so
12578 we don't have to change anything. */
12580 else if (arity == 2)
12582 /* If we thought this was a unary operator, we now know
12583 it to be a binary operator. */
12584 switch (operator_code)
12587 operator_code = MULT_EXPR;
12591 operator_code = BIT_AND_EXPR;
12595 operator_code = PLUS_EXPR;
12599 operator_code = MINUS_EXPR;
12602 case PREINCREMENT_EXPR:
12603 operator_code = POSTINCREMENT_EXPR;
12606 case PREDECREMENT_EXPR:
12607 operator_code = POSTDECREMENT_EXPR;
12611 my_friendly_abort (20000527);
12614 SET_OVERLOADED_OPERATOR_CODE (decl, operator_code);
12616 if ((operator_code == POSTINCREMENT_EXPR
12617 || operator_code == POSTDECREMENT_EXPR)
12618 && ! processing_template_decl
12619 && ! same_type_p (TREE_VALUE (TREE_CHAIN (argtypes)), integer_type_node))
12622 cp_error ("postfix `%D' must take `int' as its argument",
12626 ("postfix `%D' must take `int' as its second argument",
12633 cp_error ("`%D' must take either zero or one argument", decl);
12635 cp_error ("`%D' must take either one or two arguments", decl);
12638 /* More Effective C++ rule 6. */
12640 && (operator_code == POSTINCREMENT_EXPR
12641 || operator_code == POSTDECREMENT_EXPR
12642 || operator_code == PREINCREMENT_EXPR
12643 || operator_code == PREDECREMENT_EXPR))
12645 tree arg = TREE_VALUE (argtypes);
12646 tree ret = TREE_TYPE (TREE_TYPE (decl));
12647 if (methodp || TREE_CODE (arg) == REFERENCE_TYPE)
12648 arg = TREE_TYPE (arg);
12649 arg = TYPE_MAIN_VARIANT (arg);
12650 if (operator_code == PREINCREMENT_EXPR
12651 || operator_code == PREDECREMENT_EXPR)
12653 if (TREE_CODE (ret) != REFERENCE_TYPE
12654 || !same_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (ret)),
12656 cp_warning ("prefix `%D' should return `%T'", decl,
12657 build_reference_type (arg));
12661 if (!same_type_p (TYPE_MAIN_VARIANT (ret), arg))
12662 cp_warning ("postfix `%D' should return `%T'", decl, arg);
12666 else if (unary_op_p (operator_code))
12671 cp_error ("`%D' must take `void'", decl);
12673 cp_error ("`%D' must take exactly one argument", decl);
12676 else /* if (binary_op_p (operator_code)) */
12681 cp_error ("`%D' must take exactly one argument", decl);
12683 cp_error ("`%D' must take exactly two arguments", decl);
12686 /* More Effective C++ rule 7. */
12688 && (operator_code == TRUTH_ANDIF_EXPR
12689 || operator_code == TRUTH_ORIF_EXPR
12690 || operator_code == COMPOUND_EXPR))
12691 cp_warning ("user-defined `%D' always evaluates both arguments",
12695 /* Effective C++ rule 23. */
12698 && (operator_code == PLUS_EXPR
12699 || operator_code == MINUS_EXPR
12700 || operator_code == TRUNC_DIV_EXPR
12701 || operator_code == MULT_EXPR)
12702 && TREE_CODE (TREE_TYPE (TREE_TYPE (decl))) == REFERENCE_TYPE)
12703 cp_warning ("`%D' should return by value", decl);
12706 for (; argtypes && argtypes != void_list_node;
12707 argtypes = TREE_CHAIN (argtypes))
12708 if (TREE_PURPOSE (argtypes))
12710 TREE_PURPOSE (argtypes) = NULL_TREE;
12711 if (operator_code == POSTINCREMENT_EXPR
12712 || operator_code == POSTDECREMENT_EXPR)
12715 cp_pedwarn ("`%D' cannot have default arguments", decl);
12718 cp_error ("`%D' cannot have default arguments", decl);
12724 static const char *
12726 enum tag_types code;
12739 my_friendly_abort (981122);
12743 /* Get the struct, enum or union (CODE says which) with tag NAME.
12744 Define the tag as a forward-reference if it is not defined.
12746 C++: If a class derivation is given, process it here, and report
12747 an error if multiple derivation declarations are not identical.
12749 If this is a definition, come in through xref_tag and only look in
12750 the current frame for the name (since C++ allows new names in any
12754 xref_tag (code_type_node, name, globalize)
12755 tree code_type_node;
12759 enum tag_types tag_code;
12760 enum tree_code code;
12761 register tree ref, t;
12762 struct binding_level *b = current_binding_level;
12764 tree attributes = NULL_TREE;
12765 tree context = NULL_TREE;
12767 /* If we are called from the parser, code_type_node will sometimes be a
12768 TREE_LIST. This indicates that the user wrote
12769 "class __attribute__ ((foo)) bar". Extract the attributes so we can
12771 if (TREE_CODE (code_type_node) == TREE_LIST)
12773 attributes = TREE_PURPOSE (code_type_node);
12774 code_type_node = TREE_VALUE (code_type_node);
12777 tag_code = (enum tag_types) tree_low_cst (code_type_node, 1);
12782 code = RECORD_TYPE;
12788 code = ENUMERAL_TYPE;
12791 my_friendly_abort (18);
12794 /* If a cross reference is requested, look up the type
12795 already defined for this tag and return it. */
12799 name = TYPE_IDENTIFIER (t);
12803 t = IDENTIFIER_TYPE_VALUE (name);
12805 /* Warn about 'friend struct Inherited;' doing the wrong thing. */
12806 if (t && globalize && TREE_CODE (t) == TYPENAME_TYPE)
12808 static int explained;
12810 cp_warning ("`%s %T' declares a new type at namespace scope;\n\
12811 to refer to the inherited type, say `%s %T::%T'%s",
12812 tag_name (tag_code), name, tag_name (tag_code),
12813 constructor_name (current_class_type), TYPE_IDENTIFIER (t),
12815 (names from dependent base classes are not visible to unqualified name lookup)"
12821 if (t && TREE_CODE (t) != code && TREE_CODE (t) != TEMPLATE_TYPE_PARM
12822 && TREE_CODE (t) != BOUND_TEMPLATE_TEMPLATE_PARM)
12827 /* If we know we are defining this tag, only look it up in
12828 this scope and don't try to find it as a type. */
12829 ref = lookup_tag (code, name, b, 1);
12835 /* [dcl.type.elab] If the identifier resolves to a
12836 typedef-name or a template type-parameter, the
12837 elaborated-type-specifier is ill-formed. */
12838 if (t != TYPE_MAIN_VARIANT (t)
12839 || (CLASS_TYPE_P (t) && TYPE_WAS_ANONYMOUS (t)))
12840 cp_pedwarn ("using typedef-name `%D' after `%s'",
12841 TYPE_NAME (t), tag_name (tag_code));
12842 else if (TREE_CODE (t) == TEMPLATE_TYPE_PARM)
12843 cp_error ("using template type parameter `%T' after `%s'",
12844 t, tag_name (tag_code));
12849 ref = lookup_tag (code, name, b, 0);
12853 /* Try finding it as a type declaration. If that wins,
12855 ref = lookup_name (name, 1);
12857 if (ref != NULL_TREE
12858 && processing_template_decl
12859 && DECL_CLASS_TEMPLATE_P (ref)
12860 && template_class_depth (current_class_type) == 0)
12861 /* Since GLOBALIZE is true, we're declaring a global
12862 template, so we want this type. */
12863 ref = DECL_TEMPLATE_RESULT (ref);
12865 if (ref && TREE_CODE (ref) == TYPE_DECL
12866 && TREE_CODE (TREE_TYPE (ref)) == code)
12867 ref = TREE_TYPE (ref);
12872 if (ref && current_class_type
12873 && template_class_depth (current_class_type)
12874 && PROCESSING_REAL_TEMPLATE_DECL_P ())
12876 /* Since GLOBALIZE is non-zero, we are not looking at a
12877 definition of this tag. Since, in addition, we are currently
12878 processing a (member) template declaration of a template
12879 class, we must be very careful; consider:
12886 { template <class V>
12887 friend struct S1; };
12889 Here, the S2::S1 declaration should not be confused with the
12890 outer declaration. In particular, the inner version should
12891 have a template parameter of level 2, not level 1. This
12892 would be particularly important if the member declaration
12895 template <class V = U> friend struct S1;
12897 say, when we should tsubst into `U' when instantiating
12898 S2. On the other hand, when presented with:
12908 we must find the inner binding eventually. We
12909 accomplish this by making sure that the new type we
12910 create to represent this declaration has the right
12912 context = TYPE_CONTEXT (ref);
12919 /* If no such tag is yet defined, create a forward-reference node
12920 and record it as the "definition".
12921 When a real declaration of this type is found,
12922 the forward-reference will be altered into a real type. */
12923 if (code == ENUMERAL_TYPE)
12925 cp_error ("use of enum `%#D' without previous declaration", name);
12927 ref = make_node (ENUMERAL_TYPE);
12929 /* Give the type a default layout like unsigned int
12930 to avoid crashing if it does not get defined. */
12931 TYPE_MODE (ref) = TYPE_MODE (unsigned_type_node);
12932 TYPE_ALIGN (ref) = TYPE_ALIGN (unsigned_type_node);
12933 TYPE_USER_ALIGN (ref) = 0;
12934 TREE_UNSIGNED (ref) = 1;
12935 TYPE_PRECISION (ref) = TYPE_PRECISION (unsigned_type_node);
12936 TYPE_MIN_VALUE (ref) = TYPE_MIN_VALUE (unsigned_type_node);
12937 TYPE_MAX_VALUE (ref) = TYPE_MAX_VALUE (unsigned_type_node);
12939 /* Enable us to recognize when a type is created in class context.
12940 To do nested classes correctly, this should probably be cleared
12941 out when we leave this classes scope. Currently this in only
12942 done in `start_enum'. */
12944 pushtag (name, ref, globalize);
12948 struct binding_level *old_b = class_binding_level;
12950 ref = make_aggr_type (code);
12951 TYPE_CONTEXT (ref) = context;
12953 #ifdef NONNESTED_CLASSES
12954 /* Class types don't nest the way enums do. */
12955 class_binding_level = (struct binding_level *)0;
12957 pushtag (name, ref, globalize);
12958 class_binding_level = old_b;
12963 if (!globalize && processing_template_decl && IS_AGGR_TYPE (ref))
12964 redeclare_class_template (ref, current_template_parms);
12967 /* Until the type is defined, tentatively accept whatever
12968 structure tag the user hands us. */
12969 if (!COMPLETE_TYPE_P (ref)
12970 && ref != current_class_type
12971 /* Have to check this, in case we have contradictory tag info. */
12972 && IS_AGGR_TYPE_CODE (TREE_CODE (ref)))
12974 if (tag_code == class_type)
12975 CLASSTYPE_DECLARED_CLASS (ref) = 1;
12976 else if (tag_code == record_type)
12977 CLASSTYPE_DECLARED_CLASS (ref) = 0;
12980 TREE_TYPE (ref) = attributes;
12986 xref_tag_from_type (old, id, globalize)
12990 tree code_type_node;
12992 if (TREE_CODE (old) == RECORD_TYPE)
12993 code_type_node = (CLASSTYPE_DECLARED_CLASS (old)
12994 ? class_type_node : record_type_node);
12996 code_type_node = union_type_node;
12998 if (id == NULL_TREE)
12999 id = TYPE_IDENTIFIER (old);
13001 return xref_tag (code_type_node, id, globalize);
13004 /* REF is a type (named NAME), for which we have just seen some
13005 baseclasses. BINFO is a list of those baseclasses; the
13006 TREE_PURPOSE is an access_* node, and the TREE_VALUE is the type of
13007 the base-class. CODE_TYPE_NODE indicates whether REF is a class,
13008 struct, or union. */
13011 xref_basetypes (code_type_node, name, ref, binfo)
13012 tree code_type_node;
13016 /* In the declaration `A : X, Y, ... Z' we mark all the types
13017 (A, X, Y, ..., Z) so we can check for duplicates. */
13022 enum tag_types tag_code = (enum tag_types) tree_low_cst (code_type_node, 1);
13024 if (tag_code == union_type)
13026 cp_error ("derived union `%T' invalid", ref);
13030 len = list_length (binfo);
13032 /* First, make sure that any templates in base-classes are
13033 instantiated. This ensures that if we call ourselves recursively
13034 we do not get confused about which classes are marked and which
13036 for (base = binfo; base; base = TREE_CHAIN (base))
13037 complete_type (TREE_VALUE (base));
13039 SET_CLASSTYPE_MARKED (ref);
13040 BINFO_BASETYPES (TYPE_BINFO (ref)) = binfos = make_tree_vec (len);
13042 for (i = 0; binfo; binfo = TREE_CHAIN (binfo))
13044 /* The base of a derived struct is public by default. */
13046 = (TREE_PURPOSE (binfo) == access_public_node
13047 || TREE_PURPOSE (binfo) == access_public_virtual_node
13048 || (tag_code != class_type
13049 && (TREE_PURPOSE (binfo) == access_default_node
13050 || TREE_PURPOSE (binfo) == access_default_virtual_node)));
13052 = (TREE_PURPOSE (binfo) == access_protected_node
13053 || TREE_PURPOSE (binfo) == access_protected_virtual_node);
13055 = (TREE_PURPOSE (binfo) == access_private_virtual_node
13056 || TREE_PURPOSE (binfo) == access_protected_virtual_node
13057 || TREE_PURPOSE (binfo) == access_public_virtual_node
13058 || TREE_PURPOSE (binfo) == access_default_virtual_node);
13059 tree basetype = TREE_VALUE (binfo);
13062 if (basetype && TREE_CODE (basetype) == TYPE_DECL)
13063 basetype = TREE_TYPE (basetype);
13065 || (TREE_CODE (basetype) != RECORD_TYPE
13066 && TREE_CODE (basetype) != TYPENAME_TYPE
13067 && TREE_CODE (basetype) != TEMPLATE_TYPE_PARM
13068 && TREE_CODE (basetype) != BOUND_TEMPLATE_TEMPLATE_PARM))
13070 cp_error ("base type `%T' fails to be a struct or class type",
13071 TREE_VALUE (binfo));
13075 GNU_xref_hier (name, basetype, via_public, via_virtual, 0);
13077 /* This code replaces similar code in layout_basetypes.
13078 We put the complete_type first for implicit `typename'. */
13079 if (!COMPLETE_TYPE_P (basetype)
13080 && ! (current_template_parms && uses_template_parms (basetype)))
13082 cp_error ("base class `%T' has incomplete type", basetype);
13087 if (CLASSTYPE_MARKED (basetype))
13089 if (basetype == ref)
13090 cp_error ("recursive type `%T' undefined", basetype);
13092 cp_error ("duplicate base type `%T' invalid", basetype);
13096 if (TYPE_FOR_JAVA (basetype)
13097 && (current_lang_stack
13098 == &VARRAY_TREE (current_lang_base, 0)))
13099 TYPE_FOR_JAVA (ref) = 1;
13101 /* Note that the BINFO records which describe individual
13102 inheritances are *not* shared in the lattice! They
13103 cannot be shared because a given baseclass may be
13104 inherited with different `accessibility' by different
13105 derived classes. (Each BINFO record describing an
13106 individual inheritance contains flags which say what
13107 the `accessibility' of that particular inheritance is.) */
13110 = make_binfo (size_zero_node, basetype,
13111 CLASS_TYPE_P (basetype)
13112 ? TYPE_BINFO_VTABLE (basetype) : NULL_TREE,
13113 CLASS_TYPE_P (basetype)
13114 ? TYPE_BINFO_VIRTUALS (basetype) : NULL_TREE);
13116 TREE_VEC_ELT (binfos, i) = base_binfo;
13117 TREE_VIA_PUBLIC (base_binfo) = via_public;
13118 TREE_VIA_PROTECTED (base_binfo) = via_protected;
13119 TREE_VIA_VIRTUAL (base_binfo) = via_virtual;
13120 BINFO_INHERITANCE_CHAIN (base_binfo) = TYPE_BINFO (ref);
13122 /* We need to unshare the binfos now so that lookups during class
13123 definition work. */
13124 unshare_base_binfos (base_binfo);
13126 SET_CLASSTYPE_MARKED (basetype);
13128 /* We are free to modify these bits because they are meaningless
13129 at top level, and BASETYPE is a top-level type. */
13130 if (via_virtual || TYPE_USES_VIRTUAL_BASECLASSES (basetype))
13132 TYPE_USES_VIRTUAL_BASECLASSES (ref) = 1;
13133 /* Converting to a virtual base class requires looking
13134 up the offset of the virtual base. */
13135 TYPE_BASE_CONVS_MAY_REQUIRE_CODE_P (ref) = 1;
13138 if (CLASS_TYPE_P (basetype))
13140 TYPE_HAS_NEW_OPERATOR (ref)
13141 |= TYPE_HAS_NEW_OPERATOR (basetype);
13142 TYPE_HAS_ARRAY_NEW_OPERATOR (ref)
13143 |= TYPE_HAS_ARRAY_NEW_OPERATOR (basetype);
13144 TYPE_GETS_DELETE (ref) |= TYPE_GETS_DELETE (basetype);
13145 /* If the base-class uses multiple inheritance, so do we. */
13146 TYPE_USES_MULTIPLE_INHERITANCE (ref)
13147 |= TYPE_USES_MULTIPLE_INHERITANCE (basetype);
13148 /* Likewise, if converting to a base of the base may require
13149 code, then we may need to generate code to convert to a
13151 TYPE_BASE_CONVS_MAY_REQUIRE_CODE_P (ref)
13152 |= TYPE_BASE_CONVS_MAY_REQUIRE_CODE_P (basetype);
13159 TREE_VEC_LENGTH (binfos) = i;
13161 BINFO_BASETYPES (TYPE_BINFO (ref)) = NULL_TREE;
13165 TYPE_USES_MULTIPLE_INHERITANCE (ref) = 1;
13166 /* If there is more than one non-empty they cannot be at the same
13168 TYPE_BASE_CONVS_MAY_REQUIRE_CODE_P (ref) = 1;
13171 /* Unmark all the types. */
13173 CLEAR_CLASSTYPE_MARKED (BINFO_TYPE (TREE_VEC_ELT (binfos, i)));
13174 CLEAR_CLASSTYPE_MARKED (ref);
13176 /* Now that we know all the base-classes, set up the list of virtual
13178 get_vbase_types (ref);
13182 /* Begin compiling the definition of an enumeration type.
13183 NAME is its name (or null if anonymous).
13184 Returns the type object, as yet incomplete.
13185 Also records info about it so that build_enumerator
13186 may be used to declare the individual values as they are read. */
13192 register tree enumtype = NULL_TREE;
13193 struct binding_level *b = current_binding_level;
13195 /* If this is the real definition for a previous forward reference,
13196 fill in the contents in the same object that used to be the
13197 forward reference. */
13199 if (name != NULL_TREE)
13200 enumtype = lookup_tag (ENUMERAL_TYPE, name, b, 1);
13202 if (enumtype != NULL_TREE && TREE_CODE (enumtype) == ENUMERAL_TYPE)
13204 cp_error ("multiple definition of `%#T'", enumtype);
13205 cp_error_at ("previous definition here", enumtype);
13206 /* Clear out TYPE_VALUES, and start again. */
13207 TYPE_VALUES (enumtype) = NULL_TREE;
13211 enumtype = make_node (ENUMERAL_TYPE);
13212 pushtag (name, enumtype, 0);
13215 if (current_class_type)
13216 TREE_ADDRESSABLE (b->tags) = 1;
13218 GNU_xref_decl (current_function_decl, enumtype);
13222 /* After processing and defining all the values of an enumeration type,
13223 install their decls in the enumeration type and finish it off.
13224 ENUMTYPE is the type object and VALUES a list of name-value pairs.
13225 Returns ENUMTYPE. */
13228 finish_enum (enumtype)
13231 register tree minnode = NULL_TREE, maxnode = NULL_TREE;
13232 /* Calculate the maximum value of any enumerator in this type. */
13234 tree values = TYPE_VALUES (enumtype);
13239 for (pair = values; pair; pair = TREE_CHAIN (pair))
13244 /* The TREE_VALUE is a CONST_DECL for this enumeration
13246 decl = TREE_VALUE (pair);
13250 Following the closing brace of an enum-specifier, each
13251 enumerator has the type of its enumeration. Prior to the
13252 closing brace, the type of each enumerator is the type of
13253 its initializing value. */
13254 TREE_TYPE (decl) = enumtype;
13256 /* The DECL_INITIAL will be NULL if we are processing a
13257 template declaration and this enumeration constant had no
13258 explicit initializer. */
13259 value = DECL_INITIAL (decl);
13260 if (value && !processing_template_decl)
13262 /* Set the TREE_TYPE for the VALUE as well. That's so
13263 that when we call decl_constant_value we get an
13264 entity of the right type (but with the constant
13265 value). Since we shouldn't ever call
13266 decl_constant_value on a template type, there's no
13267 reason to do that when processing_template_decl.
13268 And, if the expression is something like a
13269 TEMPLATE_PARM_INDEX or a CAST_EXPR doing so will
13270 wreak havoc on the intended type of the expression.
13272 Of course, there's also no point in trying to compute
13273 minimum or maximum values if we're in a template. */
13274 TREE_TYPE (value) = enumtype;
13277 minnode = maxnode = value;
13278 else if (tree_int_cst_lt (maxnode, value))
13280 else if (tree_int_cst_lt (value, minnode))
13284 if (processing_template_decl)
13285 /* If this is just a template, leave the CONST_DECL
13286 alone. That way tsubst_copy will find CONST_DECLs for
13287 CONST_DECLs, and not INTEGER_CSTs. */
13290 /* In the list we're building up, we want the enumeration
13291 values, not the CONST_DECLs. */
13292 TREE_VALUE (pair) = value;
13296 maxnode = minnode = integer_zero_node;
13298 TYPE_VALUES (enumtype) = nreverse (values);
13300 if (processing_template_decl)
13302 tree scope = current_scope ();
13303 if (scope && TREE_CODE (scope) == FUNCTION_DECL)
13304 add_stmt (build_min (TAG_DEFN, enumtype));
13308 int unsignedp = tree_int_cst_sgn (minnode) >= 0;
13309 int lowprec = min_precision (minnode, unsignedp);
13310 int highprec = min_precision (maxnode, unsignedp);
13311 int precision = MAX (lowprec, highprec);
13314 TYPE_SIZE (enumtype) = NULL_TREE;
13316 /* Set TYPE_MIN_VALUE and TYPE_MAX_VALUE according to `precision'. */
13318 TYPE_PRECISION (enumtype) = precision;
13320 fixup_unsigned_type (enumtype);
13322 fixup_signed_type (enumtype);
13324 if (flag_short_enums || (precision > TYPE_PRECISION (integer_type_node)))
13325 /* Use the width of the narrowest normal C type which is wide
13327 TYPE_PRECISION (enumtype) = TYPE_PRECISION (type_for_size
13330 TYPE_PRECISION (enumtype) = TYPE_PRECISION (integer_type_node);
13332 TYPE_SIZE (enumtype) = 0;
13333 layout_type (enumtype);
13335 /* Fix up all variant types of this enum type. */
13336 for (tem = TYPE_MAIN_VARIANT (enumtype); tem;
13337 tem = TYPE_NEXT_VARIANT (tem))
13339 TYPE_VALUES (tem) = TYPE_VALUES (enumtype);
13340 TYPE_MIN_VALUE (tem) = TYPE_MIN_VALUE (enumtype);
13341 TYPE_MAX_VALUE (tem) = TYPE_MAX_VALUE (enumtype);
13342 TYPE_SIZE (tem) = TYPE_SIZE (enumtype);
13343 TYPE_SIZE_UNIT (tem) = TYPE_SIZE_UNIT (enumtype);
13344 TYPE_MODE (tem) = TYPE_MODE (enumtype);
13345 TYPE_PRECISION (tem) = TYPE_PRECISION (enumtype);
13346 TYPE_ALIGN (tem) = TYPE_ALIGN (enumtype);
13347 TYPE_USER_ALIGN (tem) = TYPE_USER_ALIGN (enumtype);
13348 TREE_UNSIGNED (tem) = TREE_UNSIGNED (enumtype);
13351 /* Finish debugging output for this type. */
13352 rest_of_type_compilation (enumtype, namespace_bindings_p ());
13358 /* Build and install a CONST_DECL for an enumeration constant of the
13359 enumeration type ENUMTYPE whose NAME and VALUE (if any) are provided.
13360 Assignment of sequential values by default is handled here. */
13363 build_enumerator (name, value, enumtype)
13373 /* Remove no-op casts from the value. */
13375 STRIP_TYPE_NOPS (value);
13377 if (! processing_template_decl)
13379 /* Validate and default VALUE. */
13380 if (value != NULL_TREE)
13382 value = decl_constant_value (value);
13384 if (TREE_CODE (value) == INTEGER_CST)
13386 value = default_conversion (value);
13387 constant_expression_warning (value);
13391 cp_error ("enumerator value for `%D' not integer constant", name);
13396 /* Default based on previous value. */
13397 if (value == NULL_TREE && ! processing_template_decl)
13401 if (TYPE_VALUES (enumtype))
13403 /* The next value is the previous value ... */
13404 prev_value = DECL_INITIAL (TREE_VALUE (TYPE_VALUES (enumtype)));
13405 /* ... plus one. */
13406 value = cp_build_binary_op (PLUS_EXPR,
13410 if (tree_int_cst_lt (value, prev_value))
13411 cp_error ("overflow in enumeration values at `%D'", name);
13414 value = integer_zero_node;
13417 /* Remove no-op casts from the value. */
13419 STRIP_TYPE_NOPS (value);
13421 /* To fix MAX_VAL enum consts. (bkoz) */
13422 TREE_TYPE (value) = integer_type_node;
13426 /* We always have to copy here; not all INTEGER_CSTs are unshared.
13427 Even in other cases, we will later (in finish_enum) be setting
13428 the type of VALUE. But, we don't need to make a copy if this
13429 VALUE is one of the enumeration constants for this same
13430 enumeration type. */
13431 for (values = TYPE_VALUES (enumtype); values; values = TREE_CHAIN (values))
13432 if (TREE_VALUE (values) == value)
13434 /* If we didn't break out of the loop, then we do need a copy. */
13435 if (!values && value)
13436 value = copy_node (value);
13438 /* C++ associates enums with global, function, or class declarations. */
13439 context = current_scope ();
13441 /* Build the actual enumeration constant. Note that the enumeration
13442 constants have the type of their initializers until the
13443 enumeration is complete:
13447 Following the closing brace of an enum-specifier, each enumer-
13448 ator has the type of its enumeration. Prior to the closing
13449 brace, the type of each enumerator is the type of its
13450 initializing value.
13452 In finish_enum we will reset the type. Of course, if we're
13453 processing a template, there may be no value. */
13454 type = value ? TREE_TYPE (value) : NULL_TREE;
13456 if (context && context == current_class_type)
13457 /* This enum declaration is local to the class. We need the full
13458 lang_decl so that we can record DECL_CLASS_CONTEXT, for example. */
13459 decl = build_lang_decl (CONST_DECL, name, type);
13461 /* It's a global enum, or it's local to a function. (Note local to
13462 a function could mean local to a class method. */
13463 decl = build_decl (CONST_DECL, name, type);
13465 DECL_CONTEXT (decl) = FROB_CONTEXT (context);
13466 DECL_INITIAL (decl) = value;
13467 TREE_READONLY (decl) = 1;
13469 if (context && context == current_class_type)
13470 /* In something like `struct S { enum E { i = 7 }; };' we put `i'
13471 on the TYPE_FIELDS list for `S'. (That's so that you can say
13472 things like `S::i' later.) */
13473 finish_member_declaration (decl);
13477 GNU_xref_decl (current_function_decl, decl);
13480 /* Add this enumeration constant to the list for this type. */
13481 TYPE_VALUES (enumtype) = tree_cons (name, decl, TYPE_VALUES (enumtype));
13485 /* We're defining DECL. Make sure that it's type is OK. */
13488 check_function_type (decl, current_function_parms)
13490 tree current_function_parms;
13492 tree fntype = TREE_TYPE (decl);
13493 tree return_type = complete_type (TREE_TYPE (fntype));
13495 /* In a function definition, arg types must be complete. */
13496 require_complete_types_for_parms (current_function_parms);
13498 if (!COMPLETE_OR_VOID_TYPE_P (return_type))
13500 cp_error ("return type `%#T' is incomplete", TREE_TYPE (fntype));
13502 /* Make it return void instead, but don't change the
13503 type of the DECL_RESULT, in case we have a named return value. */
13504 if (TREE_CODE (fntype) == METHOD_TYPE)
13506 tree ctype = TREE_TYPE (TREE_VALUE (TYPE_ARG_TYPES (fntype)));
13508 = build_cplus_method_type (ctype,
13510 FUNCTION_ARG_CHAIN (decl));
13514 = build_function_type (void_type_node,
13515 TYPE_ARG_TYPES (TREE_TYPE (decl)));
13517 = build_exception_variant (fntype,
13518 TYPE_RAISES_EXCEPTIONS (fntype));
13521 abstract_virtuals_error (decl, TREE_TYPE (fntype));
13524 /* Create the FUNCTION_DECL for a function definition.
13525 DECLSPECS and DECLARATOR are the parts of the declaration;
13526 they describe the function's name and the type it returns,
13527 but twisted together in a fashion that parallels the syntax of C.
13529 FLAGS is a bitwise or of SF_PRE_PARSED (indicating that the
13530 DECLARATOR is really the DECL for the function we are about to
13531 process and that DECLSPECS should be ignored), SF_INCLASS_INLINE
13532 indicating that the function is an inline defined in-class.
13534 This function creates a binding context for the function body
13535 as well as setting up the FUNCTION_DECL in current_function_decl.
13537 Returns 1 on success. If the DECLARATOR is not suitable for a function
13538 (it defines a datum instead), we return 0, which tells
13539 yyparse to report a parse error.
13541 For C++, we must first check whether that datum makes any sense.
13542 For example, "class A local_a(1,2);" means that variable local_a
13543 is an aggregate of type A, which should have a constructor
13544 applied to it with the argument list [1, 2]. */
13547 start_function (declspecs, declarator, attrs, flags)
13548 tree declspecs, declarator, attrs;
13552 tree ctype = NULL_TREE;
13555 extern int have_extern_spec;
13556 extern int used_extern_spec;
13557 int doing_friend = 0;
13558 struct binding_level *bl;
13559 tree current_function_parms;
13561 /* Sanity check. */
13562 my_friendly_assert (TREE_CODE (TREE_VALUE (void_list_node)) == VOID_TYPE, 160);
13563 my_friendly_assert (TREE_CHAIN (void_list_node) == NULL_TREE, 161);
13565 /* This should only be done once on the top most decl. */
13566 if (have_extern_spec && !used_extern_spec)
13568 declspecs = tree_cons (NULL_TREE, get_identifier ("extern"), declspecs);
13569 used_extern_spec = 1;
13572 if (flags & SF_PRE_PARSED)
13574 decl1 = declarator;
13576 fntype = TREE_TYPE (decl1);
13577 if (TREE_CODE (fntype) == METHOD_TYPE)
13578 ctype = TYPE_METHOD_BASETYPE (fntype);
13580 /* ISO C++ 11.4/5. A friend function defined in a class is in
13581 the (lexical) scope of the class in which it is defined. */
13582 if (!ctype && DECL_FRIEND_P (decl1))
13584 ctype = DECL_FRIEND_CONTEXT (decl1);
13586 /* CTYPE could be null here if we're dealing with a template;
13587 for example, `inline friend float foo()' inside a template
13588 will have no CTYPE set. */
13589 if (ctype && TREE_CODE (ctype) != RECORD_TYPE)
13595 last_function_parms = DECL_ARGUMENTS (decl1);
13596 last_function_parm_tags = NULL_TREE;
13600 decl1 = grokdeclarator (declarator, declspecs, FUNCDEF, 1, NULL_TREE);
13601 /* If the declarator is not suitable for a function definition,
13602 cause a syntax error. */
13603 if (decl1 == NULL_TREE || TREE_CODE (decl1) != FUNCTION_DECL) return 0;
13605 fntype = TREE_TYPE (decl1);
13607 restype = TREE_TYPE (fntype);
13608 if (CLASS_TYPE_P (restype) && !CLASSTYPE_GOT_SEMICOLON (restype))
13610 cp_error ("semicolon missing after declaration of `%#T'", restype);
13611 shadow_tag (build_tree_list (NULL_TREE, restype));
13612 CLASSTYPE_GOT_SEMICOLON (restype) = 1;
13613 if (TREE_CODE (fntype) == FUNCTION_TYPE)
13614 fntype = build_function_type (integer_type_node,
13615 TYPE_ARG_TYPES (fntype));
13617 fntype = build_cplus_method_type (build_type_variant (TYPE_METHOD_BASETYPE (fntype), TREE_READONLY (decl1), TREE_SIDE_EFFECTS (decl1)),
13619 TYPE_ARG_TYPES (fntype));
13620 TREE_TYPE (decl1) = fntype;
13623 if (TREE_CODE (fntype) == METHOD_TYPE)
13624 ctype = TYPE_METHOD_BASETYPE (fntype);
13625 else if (DECL_MAIN_P (decl1))
13627 /* If this doesn't return integer_type, complain. */
13628 if (TREE_TYPE (TREE_TYPE (decl1)) != integer_type_node)
13630 if (pedantic || warn_return_type)
13631 pedwarn ("return type for `main' changed to `int'");
13632 TREE_TYPE (decl1) = fntype = default_function_type;
13637 /* Sometimes we don't notice that a function is a static member, and
13638 build a METHOD_TYPE for it. Fix that up now. */
13639 if (ctype != NULL_TREE && DECL_STATIC_FUNCTION_P (decl1)
13640 && TREE_CODE (TREE_TYPE (decl1)) == METHOD_TYPE)
13642 revert_static_member_fn (decl1);
13643 last_function_parms = TREE_CHAIN (last_function_parms);
13647 /* Warn if function was previously implicitly declared
13648 (but not if we warned then). */
13649 if (! warn_implicit
13650 && IDENTIFIER_IMPLICIT_DECL (DECL_NAME (decl1)) != NULL_TREE)
13651 cp_warning_at ("`%D' implicitly declared before its definition", IDENTIFIER_IMPLICIT_DECL (DECL_NAME (decl1)));
13653 /* Set up current_class_type, and enter the scope of the class, if
13656 push_nested_class (ctype, 1);
13657 else if (DECL_STATIC_FUNCTION_P (decl1))
13658 push_nested_class (DECL_CONTEXT (decl1), 2);
13660 /* Now that we have entered the scope of the class, we must restore
13661 the bindings for any template parameters surrounding DECL1, if it
13662 is an inline member template. (Order is important; consider the
13663 case where a template parameter has the same name as a field of
13664 the class.) It is not until after this point that
13665 PROCESSING_TEMPLATE_DECL is guaranteed to be set up correctly. */
13666 if (flags & SF_INCLASS_INLINE)
13667 maybe_begin_member_template_processing (decl1);
13669 /* Effective C++ rule 15. */
13671 && DECL_OVERLOADED_OPERATOR_P (decl1) == NOP_EXPR
13672 && TREE_CODE (TREE_TYPE (fntype)) == VOID_TYPE)
13673 cp_warning ("`operator=' should return a reference to `*this'");
13675 /* Make the init_value nonzero so pushdecl knows this is not tentative.
13676 error_mark_node is replaced below (in poplevel) with the BLOCK. */
13677 if (!DECL_INITIAL (decl1))
13678 DECL_INITIAL (decl1) = error_mark_node;
13680 #ifdef SET_DEFAULT_DECL_ATTRIBUTES
13681 SET_DEFAULT_DECL_ATTRIBUTES (decl1, attrs);
13684 /* This function exists in static storage.
13685 (This does not mean `static' in the C sense!) */
13686 TREE_STATIC (decl1) = 1;
13688 /* We must call push_template_decl after current_class_type is set
13689 up. (If we are processing inline definitions after exiting a
13690 class scope, current_class_type will be NULL_TREE until set above
13691 by push_nested_class.) */
13692 if (processing_template_decl)
13693 decl1 = push_template_decl (decl1);
13695 /* We are now in the scope of the function being defined. */
13696 current_function_decl = decl1;
13698 /* Save the parm names or decls from this function's declarator
13699 where store_parm_decls will find them. */
13700 current_function_parms = last_function_parms;
13701 current_function_parm_tags = last_function_parm_tags;
13703 /* Make sure the parameter and return types are reasonable. When
13704 you declare a function, these types can be incomplete, but they
13705 must be complete when you define the function. */
13706 if (! processing_template_decl)
13707 check_function_type (decl1, current_function_parms);
13709 /* Build the return declaration for the function. */
13710 restype = TREE_TYPE (fntype);
13711 if (!processing_template_decl)
13713 if (!DECL_RESULT (decl1))
13715 DECL_RESULT (decl1)
13716 = build_decl (RESULT_DECL, 0, TYPE_MAIN_VARIANT (restype));
13717 c_apply_type_quals_to_decl (CP_TYPE_QUALS (restype),
13718 DECL_RESULT (decl1));
13722 /* Just use `void'. Nobody will ever look at this anyhow. */
13723 DECL_RESULT (decl1) = build_decl (RESULT_DECL, 0, void_type_node);
13725 /* Initialize RTL machinery. We cannot do this until
13726 CURRENT_FUNCTION_DECL and DECL_RESULT are set up. We do this
13727 even when processing a template; this is how we get
13728 CFUN set up, and our per-function variables initialized. */
13729 bl = current_binding_level;
13730 init_function_start (decl1, input_filename, lineno);
13731 current_binding_level = bl;
13733 /* Even though we're inside a function body, we still don't want to
13734 call expand_expr to calculate the size of a variable-sized array.
13735 We haven't necessarily assigned RTL to all variables yet, so it's
13736 not safe to try to expand expressions involving them. */
13737 immediate_size_expand = 0;
13738 cfun->x_dont_save_pending_sizes_p = 1;
13740 /* Start the statement-tree, start the tree now. */
13741 begin_stmt_tree (&DECL_SAVED_TREE (decl1));
13743 /* Let the user know we're compiling this function. */
13744 announce_function (decl1);
13746 /* Record the decl so that the function name is defined.
13747 If we already have a decl for this name, and it is a FUNCTION_DECL,
13748 use the old decl. */
13749 if (!processing_template_decl && !(flags & SF_PRE_PARSED))
13751 /* A specialization is not used to guide overload resolution. */
13752 if (!DECL_TEMPLATE_SPECIALIZATION (decl1)
13753 && ! DECL_FUNCTION_MEMBER_P (decl1))
13754 decl1 = pushdecl (decl1);
13757 /* We need to set the DECL_CONTEXT. */
13758 if (!DECL_CONTEXT (decl1) && DECL_TEMPLATE_INFO (decl1))
13759 DECL_CONTEXT (decl1) = DECL_CONTEXT (DECL_TI_TEMPLATE (decl1));
13760 /* And make sure we have enough default args. */
13761 check_default_args (decl1);
13763 fntype = TREE_TYPE (decl1);
13766 /* Reset these in case the call to pushdecl changed them. */
13767 current_function_decl = decl1;
13768 cfun->decl = decl1;
13770 /* If we are (erroneously) defining a function that we have already
13771 defined before, wipe out what we knew before. */
13772 if (!DECL_PENDING_INLINE_P (decl1)
13773 && DECL_SAVED_FUNCTION_DATA (decl1))
13775 free (DECL_SAVED_FUNCTION_DATA (decl1));
13776 DECL_SAVED_FUNCTION_DATA (decl1) = NULL;
13779 if (ctype && !doing_friend && !DECL_STATIC_FUNCTION_P (decl1))
13781 /* We know that this was set up by `grokclassfn'. We do not
13782 wait until `store_parm_decls', since evil parse errors may
13783 never get us to that point. Here we keep the consistency
13784 between `current_class_type' and `current_class_ptr'. */
13785 tree t = DECL_ARGUMENTS (decl1);
13787 my_friendly_assert (t != NULL_TREE && TREE_CODE (t) == PARM_DECL,
13789 my_friendly_assert (TREE_CODE (TREE_TYPE (t)) == POINTER_TYPE,
13792 cp_function_chain->x_current_class_ref
13793 = build_indirect_ref (t, NULL_PTR);
13794 cp_function_chain->x_current_class_ptr = t;
13796 /* Constructors and destructors need to know whether they're "in
13797 charge" of initializing virtual base classes. */
13798 if (DECL_HAS_IN_CHARGE_PARM_P (decl1))
13799 current_in_charge_parm = TREE_CHAIN (t);
13802 if (DECL_INTERFACE_KNOWN (decl1))
13804 tree ctx = decl_function_context (decl1);
13806 if (DECL_NOT_REALLY_EXTERN (decl1))
13807 DECL_EXTERNAL (decl1) = 0;
13809 if (ctx != NULL_TREE && DECL_THIS_INLINE (ctx)
13810 && TREE_PUBLIC (ctx))
13811 /* This is a function in a local class in an extern inline
13813 comdat_linkage (decl1);
13815 /* If this function belongs to an interface, it is public.
13816 If it belongs to someone else's interface, it is also external.
13817 This only affects inlines and template instantiations. */
13818 else if (interface_unknown == 0
13819 && (! DECL_TEMPLATE_INSTANTIATION (decl1)
13820 || flag_alt_external_templates))
13822 if (DECL_THIS_INLINE (decl1) || DECL_TEMPLATE_INSTANTIATION (decl1)
13823 || processing_template_decl)
13825 DECL_EXTERNAL (decl1)
13827 || (DECL_THIS_INLINE (decl1) && ! flag_implement_inlines
13828 && !DECL_VINDEX (decl1)));
13830 /* For WIN32 we also want to put these in linkonce sections. */
13831 maybe_make_one_only (decl1);
13834 DECL_EXTERNAL (decl1) = 0;
13835 DECL_NOT_REALLY_EXTERN (decl1) = 0;
13836 DECL_INTERFACE_KNOWN (decl1) = 1;
13838 else if (interface_unknown && interface_only
13839 && (! DECL_TEMPLATE_INSTANTIATION (decl1)
13840 || flag_alt_external_templates))
13842 /* If MULTIPLE_SYMBOL_SPACES is defined and we saw a #pragma
13843 interface, we will have interface_only set but not
13844 interface_known. In that case, we don't want to use the normal
13845 heuristics because someone will supply a #pragma implementation
13846 elsewhere, and deducing it here would produce a conflict. */
13847 comdat_linkage (decl1);
13848 DECL_EXTERNAL (decl1) = 0;
13849 DECL_INTERFACE_KNOWN (decl1) = 1;
13850 DECL_DEFER_OUTPUT (decl1) = 1;
13854 /* This is a definition, not a reference.
13855 So clear DECL_EXTERNAL. */
13856 DECL_EXTERNAL (decl1) = 0;
13858 if ((DECL_THIS_INLINE (decl1) || DECL_TEMPLATE_INSTANTIATION (decl1))
13859 && ! DECL_INTERFACE_KNOWN (decl1)
13860 /* Don't try to defer nested functions for now. */
13861 && ! decl_function_context (decl1))
13862 DECL_DEFER_OUTPUT (decl1) = 1;
13864 DECL_INTERFACE_KNOWN (decl1) = 1;
13868 current_binding_level->parm_flag = 1;
13871 cplus_decl_attributes (decl1, NULL_TREE, attrs);
13873 /* We need to do this even if we aren't expanding yet so that
13874 assemble_external works. */
13875 make_function_rtl (decl1);
13877 /* Promote the value to int before returning it. */
13878 if (C_PROMOTING_INTEGER_TYPE_P (restype))
13879 restype = type_promotes_to (restype);
13881 /* If this fcn was already referenced via a block-scope `extern' decl
13882 (or an implicit decl), propagate certain information about the usage. */
13883 if (TREE_ADDRESSABLE (DECL_ASSEMBLER_NAME (decl1)))
13884 TREE_ADDRESSABLE (decl1) = 1;
13886 if (DECL_RESULT (decl1) == NULL_TREE)
13888 DECL_RESULT (decl1)
13889 = build_decl (RESULT_DECL, 0, TYPE_MAIN_VARIANT (restype));
13890 TREE_READONLY (DECL_RESULT (decl1)) = CP_TYPE_CONST_P (restype);
13891 TREE_THIS_VOLATILE (DECL_RESULT (decl1)) = CP_TYPE_VOLATILE_P (restype);
13896 if (DECL_DESTRUCTOR_P (decl1))
13898 dtor_label = build_decl (LABEL_DECL, NULL_TREE, NULL_TREE);
13899 DECL_CONTEXT (dtor_label) = current_function_decl;
13901 /* Under the old ABI we return `this' from constructors, so we make
13902 ordinary `return' statements in constructors jump to CTOR_LABEL;
13903 from there we return `this'. Under the new ABI, we don't bother
13904 with any of this. By not setting CTOR_LABEL the remainder of the
13905 machinery is automatically disabled. */
13906 else if (!flag_new_abi && DECL_CONSTRUCTOR_P (decl1))
13908 ctor_label = build_decl (LABEL_DECL, NULL_TREE, NULL_TREE);
13909 DECL_CONTEXT (ctor_label) = current_function_decl;
13912 store_parm_decls (current_function_parms);
13917 /* Store the parameter declarations into the current function declaration.
13918 This is called after parsing the parameter declarations, before
13919 digesting the body of the function.
13921 Also install to binding contour return value identifier, if any. */
13924 store_parm_decls (current_function_parms)
13925 tree current_function_parms;
13927 register tree fndecl = current_function_decl;
13928 register tree parm;
13929 int parms_have_cleanups = 0;
13930 tree cleanups = NULL_TREE;
13932 /* This is a list of types declared among parms in a prototype. */
13933 tree parmtags = current_function_parm_tags;
13935 /* This is a chain of any other decls that came in among the parm
13936 declarations. If a parm is declared with enum {foo, bar} x;
13937 then CONST_DECLs for foo and bar are put here. */
13938 tree nonparms = NULL_TREE;
13940 if (current_function_parms)
13942 /* This case is when the function was defined with an ANSI prototype.
13943 The parms already have decls, so we need not do anything here
13944 except record them as in effect
13945 and complain if any redundant old-style parm decls were written. */
13947 tree specparms = current_function_parms;
13950 /* Must clear this because it might contain TYPE_DECLs declared
13952 storedecls (NULL_TREE);
13954 /* If we're doing semantic analysis, then we'll call pushdecl
13955 for each of these. We must do them in reverse order so that
13956 they end in the correct forward order. */
13957 specparms = nreverse (specparms);
13959 for (parm = specparms; parm; parm = next)
13961 next = TREE_CHAIN (parm);
13962 if (TREE_CODE (parm) == PARM_DECL)
13966 if (DECL_NAME (parm) == NULL_TREE
13967 || TREE_CODE (parm) != VOID_TYPE)
13970 cp_error ("parameter `%D' declared void", parm);
13972 cleanup = (processing_template_decl
13974 : maybe_build_cleanup (parm));
13977 cleanups = tree_cons (parm, cleanup, cleanups);
13981 /* If we find an enum constant or a type tag,
13982 put it aside for the moment. */
13983 TREE_CHAIN (parm) = NULL_TREE;
13984 nonparms = chainon (nonparms, parm);
13988 /* Get the decls in their original chain order and record in the
13989 function. This is all and only the PARM_DECLs that were
13990 pushed into scope by the loop above. */
13991 DECL_ARGUMENTS (fndecl) = getdecls ();
13992 storetags (chainon (parmtags, gettags ()));
13995 DECL_ARGUMENTS (fndecl) = NULL_TREE;
13997 /* Now store the final chain of decls for the arguments
13998 as the decl-chain of the current lexical scope.
13999 Put the enumerators in as well, at the front so that
14000 DECL_ARGUMENTS is not modified. */
14001 storedecls (chainon (nonparms, DECL_ARGUMENTS (fndecl)));
14003 /* Now that we have initialized the parms, we can start their
14004 cleanups. We cannot do this before, since expand_decl_cleanup
14005 should not be called before the parm can be used. */
14008 finish_decl_cleanup (TREE_PURPOSE (cleanups),
14009 TREE_VALUE (cleanups));
14010 cleanups = TREE_CHAIN (cleanups);
14013 /* Create a binding contour which can be used to catch
14014 cleanup-generated temporaries. */
14015 if (parms_have_cleanups)
14018 /* Do the starting of the exception specifications, if we have any. */
14019 if (flag_exceptions && !processing_template_decl
14020 && flag_enforce_eh_specs
14021 && TYPE_RAISES_EXCEPTIONS (TREE_TYPE (current_function_decl)))
14022 current_eh_spec_try_block = expand_start_eh_spec ();
14026 /* We have finished doing semantic analysis on DECL, but have not yet
14027 generated RTL for its body. Save away our current state, so that
14028 when we want to generate RTL later we know what to do. */
14031 save_function_data (decl)
14034 struct cp_language_function *f;
14036 /* Save the language-specific per-function data so that we can
14037 get it back when we really expand this function. */
14038 my_friendly_assert (!DECL_PENDING_INLINE_P (decl),
14042 f = ((struct cp_language_function *)
14043 xmalloc (sizeof (struct cp_language_function)));
14044 bcopy ((char *) cp_function_chain, (char *) f,
14045 sizeof (struct cp_language_function));
14046 DECL_SAVED_FUNCTION_DATA (decl) = f;
14048 /* Clear out the bits we don't need. */
14049 f->base.x_stmt_tree.x_last_stmt = NULL_TREE;
14050 f->base.x_stmt_tree.x_last_expr_type = NULL_TREE;
14051 f->x_named_label_uses = NULL;
14052 f->bindings = NULL;
14054 /* When we get back here again, we will be expanding. */
14055 f->x_expanding_p = 1;
14057 /* If we've already decided that we cannot inline this function, we
14058 must remember that fact when we actually go to expand the
14060 f->cannot_inline = current_function_cannot_inline;
14063 /* At the end of every constructor we generate to code to return
14064 `this'. Do that now. */
14067 finish_constructor_body ()
14069 /* Any return from a constructor will end up here. */
14071 add_stmt (build_stmt (LABEL_STMT, ctor_label));
14073 /* Clear CTOR_LABEL so that finish_return_stmt knows to really
14074 generate the return, rather than a goto to CTOR_LABEL. */
14075 ctor_label = NULL_TREE;
14076 /* In check_return_expr we translate an empty return from a
14077 constructor to a return of `this'. */
14078 finish_return_stmt (NULL_TREE);
14079 /* Mark the end of the constructor. */
14080 add_stmt (build_stmt (CTOR_STMT));
14083 /* At the end of every destructor we generate code to restore virtual
14084 function tables to the values desired by base classes and to call
14085 to base class destructors. Do that now. */
14088 finish_destructor_body ()
14090 tree compound_stmt;
14095 /* Create a block to contain all the extra code. */
14096 compound_stmt = begin_compound_stmt (/*has_no_scope=*/0);
14098 /* Any return from a destructor will end up here. */
14099 add_stmt (build_stmt (LABEL_STMT, dtor_label));
14101 /* Generate the code to call destructor on base class. If this
14102 destructor belongs to a class with virtual functions, then set
14103 the virtual function table pointer to represent the type of our
14106 /* This side-effect makes call to `build_delete' generate the code
14107 we have to have at the end of this destructor. `build_delete'
14108 will set the flag again. */
14109 TYPE_HAS_DESTRUCTOR (current_class_type) = 0;
14111 exprstmt = build_delete (current_class_type,
14113 sfk_base_destructor,
14114 LOOKUP_NONVIRTUAL|LOOKUP_DESTRUCTOR|LOOKUP_NORMAL,
14117 if (exprstmt != error_mark_node
14118 && (TREE_CODE (exprstmt) != NOP_EXPR
14119 || TREE_OPERAND (exprstmt, 0) != integer_zero_node
14120 || TYPE_USES_VIRTUAL_BASECLASSES (current_class_type)))
14122 if (exprstmt != void_zero_node)
14123 /* Don't call `expand_expr_stmt' if we're not going to do
14124 anything, since -Wall will give a diagnostic. */
14125 finish_expr_stmt (exprstmt);
14127 /* Run destructors for all virtual baseclasses. */
14128 if (TYPE_USES_VIRTUAL_BASECLASSES (current_class_type))
14133 if_stmt = begin_if_stmt ();
14134 finish_if_stmt_cond (build (BIT_AND_EXPR, integer_type_node,
14135 current_in_charge_parm,
14139 vbases = CLASSTYPE_VBASECLASSES (current_class_type);
14140 /* The CLASSTYPE_VBASECLASSES list is in initialization
14141 order, so we have to march through it in reverse order. */
14142 for (vbases = nreverse (copy_list (vbases));
14144 vbases = TREE_CHAIN (vbases))
14146 tree vbase = TREE_VALUE (vbases);
14148 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (BINFO_TYPE (vbase)))
14150 tree vb = get_vbase
14151 (BINFO_TYPE (vbase),
14152 TYPE_BINFO (current_class_type));
14154 (build_scoped_method_call
14155 (current_class_ref, vb, base_dtor_identifier,
14160 finish_then_clause (if_stmt);
14165 virtual_size = c_sizeof (current_class_type);
14167 /* At the end, call delete if that's what's requested. */
14169 /* FDIS sez: At the point of definition of a virtual destructor
14170 (including an implicit definition), non-placement operator delete
14171 shall be looked up in the scope of the destructor's class and if
14172 found shall be accessible and unambiguous.
14174 This is somewhat unclear, but I take it to mean that if the class
14175 only defines placement deletes we don't do anything here. So we
14176 pass LOOKUP_SPECULATIVELY; delete_sanity will complain for us if
14177 they ever try to delete one of these. */
14178 exprstmt = build_op_delete_call
14179 (DELETE_EXPR, current_class_ptr, virtual_size,
14180 LOOKUP_NORMAL | LOOKUP_SPECULATIVELY, NULL_TREE);
14182 if_stmt = begin_if_stmt ();
14183 finish_if_stmt_cond (build (BIT_AND_EXPR, integer_type_node,
14184 current_in_charge_parm,
14187 finish_expr_stmt (exprstmt);
14188 finish_then_clause (if_stmt);
14191 /* Close the block we started above. */
14192 finish_compound_stmt (/*has_no_scope=*/0, compound_stmt);
14195 /* Finish up a function declaration and compile that function
14196 all the way to assembler language output. The free the storage
14197 for the function definition.
14199 FLAGS is a bitwise or of the following values:
14201 An extra call to poplevel (and expand_end_bindings) must be
14202 made to take care of the binding contour for the base
14203 initializers. This is only relevant for constructors.
14205 We just finished processing the body of an in-class inline
14206 function definition. (This processing will have taken place
14207 after the class definition is complete.) */
14210 finish_function (flags)
14213 register tree fndecl = current_function_decl;
14214 tree fntype, ctype = NULL_TREE;
14215 int call_poplevel = (flags & 1) != 0;
14216 int inclass_inline = (flags & 2) != 0;
14219 /* When we get some parse errors, we can end up without a
14220 current_function_decl, so cope. */
14221 if (fndecl == NULL_TREE)
14222 return error_mark_node;
14224 nested = function_depth > 1;
14225 fntype = TREE_TYPE (fndecl);
14227 /* TREE_READONLY (fndecl) = 1;
14228 This caused &foo to be of type ptr-to-const-function
14229 which then got a warning when stored in a ptr-to-function variable. */
14231 my_friendly_assert (building_stmt_tree (), 20000911);
14233 /* For a cloned function, we've already got all the code we need;
14234 there's no need to add any extra bits. */
14235 if (!DECL_CLONED_FUNCTION_P (fndecl))
14237 if (DECL_CONSTRUCTOR_P (fndecl))
14239 finish_constructor_body ();
14243 else if (DECL_DESTRUCTOR_P (fndecl) && !processing_template_decl)
14244 finish_destructor_body ();
14245 else if (DECL_MAIN_P (fndecl))
14247 /* Make it so that `main' always returns 0 by default. */
14249 finish_return_stmt (integer_one_node);
14251 finish_return_stmt (integer_zero_node);
14255 /* Finish dealing with exception specifiers. */
14256 if (flag_exceptions && !processing_template_decl
14257 && flag_enforce_eh_specs
14258 && TYPE_RAISES_EXCEPTIONS (TREE_TYPE (current_function_decl)))
14259 expand_end_eh_spec (TYPE_RAISES_EXCEPTIONS
14260 (TREE_TYPE (current_function_decl)),
14261 current_eh_spec_try_block);
14264 /* If we're saving up tree structure, tie off the function now. */
14265 finish_stmt_tree (&DECL_SAVED_TREE (fndecl));
14267 /* This must come after expand_function_end because cleanups might
14268 have declarations (from inline functions) that need to go into
14269 this function's blocks. */
14270 if (current_binding_level->parm_flag != 1)
14271 my_friendly_abort (122);
14272 poplevel (1, 0, 1);
14274 /* Remember that we were in class scope. */
14275 if (current_class_name)
14276 ctype = current_class_type;
14278 /* Must mark the RESULT_DECL as being in this function. */
14279 DECL_CONTEXT (DECL_RESULT (fndecl)) = fndecl;
14281 /* Set the BLOCK_SUPERCONTEXT of the outermost function scope to point
14282 to the FUNCTION_DECL node itself. */
14283 BLOCK_SUPERCONTEXT (DECL_INITIAL (fndecl)) = fndecl;
14285 /* Save away current state, if appropriate. */
14286 if (!processing_template_decl)
14287 save_function_data (fndecl);
14289 /* If this function calls `setjmp' it cannot be inlined. When
14290 `longjmp' is called it is not guaranteed to restore the value of
14291 local variables that have been modified since the call to
14292 `setjmp'. So, if were to inline this function into some caller
14293 `c', then when we `longjmp', we might not restore all variables
14294 in `c'. (It might seem, at first blush, that there's no way for
14295 this function to modify local variables in `c', but their
14296 addresses may have been stored somewhere accessible to this
14298 if (!processing_template_decl && calls_setjmp_p (fndecl))
14299 DECL_UNINLINABLE (fndecl) = 1;
14301 /* Clear out memory we no longer need. */
14302 free_after_parsing (cfun);
14303 /* Since we never call rest_of_compilation, we never clear
14304 CFUN. Do so explicitly. */
14305 free_after_compilation (cfun);
14308 /* If this is a in-class inline definition, we may have to pop the
14309 bindings for the template parameters that we added in
14310 maybe_begin_member_template_processing when start_function was
14312 if (inclass_inline)
14313 maybe_end_member_template_processing ();
14315 /* Leave the scope of the class. */
14317 pop_nested_class ();
14323 /* Let the error reporting routines know that we're outside a
14324 function. For a nested function, this value is used in
14325 pop_cp_function_context and then reset via pop_function_context. */
14326 current_function_decl = NULL_TREE;
14331 /* Create the FUNCTION_DECL for a function definition.
14332 DECLSPECS and DECLARATOR are the parts of the declaration;
14333 they describe the return type and the name of the function,
14334 but twisted together in a fashion that parallels the syntax of C.
14336 This function creates a binding context for the function body
14337 as well as setting up the FUNCTION_DECL in current_function_decl.
14339 Returns a FUNCTION_DECL on success.
14341 If the DECLARATOR is not suitable for a function (it defines a datum
14342 instead), we return 0, which tells yyparse to report a parse error.
14344 May return void_type_node indicating that this method is actually
14345 a friend. See grokfield for more details.
14347 Came here with a `.pushlevel' .
14349 DO NOT MAKE ANY CHANGES TO THIS CODE WITHOUT MAKING CORRESPONDING
14350 CHANGES TO CODE IN `grokfield'. */
14353 start_method (declspecs, declarator, attrlist)
14354 tree declarator, declspecs, attrlist;
14356 tree fndecl = grokdeclarator (declarator, declspecs, MEMFUNCDEF, 0,
14359 /* Something too ugly to handle. */
14360 if (fndecl == NULL_TREE)
14363 /* Pass friends other than inline friend functions back. */
14364 if (fndecl == void_type_node)
14367 if (TREE_CODE (fndecl) != FUNCTION_DECL)
14368 /* Not a function, tell parser to report parse error. */
14371 if (DECL_IN_AGGR_P (fndecl))
14373 if (IDENTIFIER_ERROR_LOCUS (DECL_ASSEMBLER_NAME (fndecl)) != current_class_type)
14375 if (DECL_CONTEXT (fndecl)
14376 && TREE_CODE( DECL_CONTEXT (fndecl)) != NAMESPACE_DECL)
14377 cp_error ("`%D' is already defined in class `%T'", fndecl,
14378 DECL_CONTEXT (fndecl));
14380 return void_type_node;
14383 check_template_shadow (fndecl);
14385 DECL_THIS_INLINE (fndecl) = 1;
14387 if (flag_default_inline)
14388 DECL_INLINE (fndecl) = 1;
14390 /* We process method specializations in finish_struct_1. */
14391 if (processing_template_decl && !DECL_TEMPLATE_SPECIALIZATION (fndecl))
14392 fndecl = push_template_decl (fndecl);
14394 if (! DECL_FRIEND_P (fndecl))
14396 if (TREE_CHAIN (fndecl))
14398 fndecl = copy_node (fndecl);
14399 TREE_CHAIN (fndecl) = NULL_TREE;
14402 if (DECL_CONSTRUCTOR_P (fndecl))
14404 if (! grok_ctor_properties (current_class_type, fndecl))
14405 return void_type_node;
14407 else if (IDENTIFIER_OPNAME_P (DECL_NAME (fndecl)))
14408 grok_op_properties (fndecl, DECL_VIRTUAL_P (fndecl), 0);
14411 cp_finish_decl (fndecl, NULL_TREE, NULL_TREE, 0);
14413 /* Make a place for the parms */
14415 current_binding_level->parm_flag = 1;
14417 DECL_IN_AGGR_P (fndecl) = 1;
14421 /* Go through the motions of finishing a function definition.
14422 We don't compile this method until after the whole class has
14425 FINISH_METHOD must return something that looks as though it
14426 came from GROKFIELD (since we are defining a method, after all).
14428 This is called after parsing the body of the function definition.
14429 STMTS is the chain of statements that makes up the function body.
14431 DECL is the ..._DECL that `start_method' provided. */
14434 finish_method (decl)
14437 register tree fndecl = decl;
14440 register tree link;
14442 if (decl == void_type_node)
14445 old_initial = DECL_INITIAL (fndecl);
14447 /* Undo the level for the parms (from start_method).
14448 This is like poplevel, but it causes nothing to be
14449 saved. Saving information here confuses symbol-table
14450 output routines. Besides, this information will
14451 be correctly output when this method is actually
14454 /* Clear out the meanings of the local variables of this level;
14455 also record in each decl which block it belongs to. */
14457 for (link = current_binding_level->names; link; link = TREE_CHAIN (link))
14459 if (DECL_NAME (link) != NULL_TREE)
14460 pop_binding (DECL_NAME (link), link);
14461 my_friendly_assert (TREE_CODE (link) != FUNCTION_DECL, 163);
14462 DECL_CONTEXT (link) = NULL_TREE;
14465 GNU_xref_end_scope ((HOST_WIDE_INT) current_binding_level,
14466 (HOST_WIDE_INT) current_binding_level->level_chain,
14467 current_binding_level->parm_flag,
14468 current_binding_level->keep);
14470 poplevel (0, 0, 0);
14472 DECL_INITIAL (fndecl) = old_initial;
14474 /* We used to check if the context of FNDECL was different from
14475 current_class_type as another way to get inside here. This didn't work
14476 for String.cc in libg++. */
14477 if (DECL_FRIEND_P (fndecl))
14479 CLASSTYPE_INLINE_FRIENDS (current_class_type)
14480 = tree_cons (NULL_TREE, fndecl, CLASSTYPE_INLINE_FRIENDS (current_class_type));
14481 decl = void_type_node;
14487 /* Called when a new struct TYPE is defined.
14488 If this structure or union completes the type of any previous
14489 variable declaration, lay it out and output its rtl. */
14492 hack_incomplete_structures (type)
14496 struct binding_level *level;
14498 if (!type) /* Don't do this for class templates. */
14501 if (namespace_bindings_p ())
14504 list = &namespace_scope_incomplete;
14508 level = innermost_nonclass_level ();
14509 list = &level->incomplete;
14516 tree decl = TREE_VALUE (*list);
14517 if ((decl && TREE_TYPE (decl) == type)
14518 || (TREE_TYPE (decl)
14519 && TREE_CODE (TREE_TYPE (decl)) == ARRAY_TYPE
14520 && TREE_TYPE (TREE_TYPE (decl)) == type))
14522 int toplevel = toplevel_bindings_p ();
14523 if (TREE_CODE (TREE_TYPE (decl)) == ARRAY_TYPE
14524 && TREE_TYPE (TREE_TYPE (decl)) == type)
14525 layout_type (TREE_TYPE (decl));
14526 layout_decl (decl, 0);
14527 rest_of_decl_compilation (decl, NULL_PTR, toplevel, 0);
14531 expand_decl (decl);
14532 cleanup = maybe_build_cleanup (decl);
14533 expand_decl_init (decl);
14534 if (! expand_decl_cleanup (decl, cleanup))
14535 cp_error ("parser lost in parsing declaration of `%D'",
14538 *list = TREE_CHAIN (*list);
14541 list = &TREE_CHAIN (*list);
14544 /* Keep looking through artificial binding levels generated
14545 for local variables. */
14546 if (level && level->keep == 2)
14548 level = level->level_chain;
14549 list = &level->incomplete;
14556 /* If DECL is of a type which needs a cleanup, build that cleanup
14560 maybe_build_cleanup (decl)
14563 tree type = TREE_TYPE (decl);
14565 if (type != error_mark_node && TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type))
14567 int flags = LOOKUP_NORMAL|LOOKUP_DESTRUCTOR;
14570 if (TREE_CODE (type) == ARRAY_TYPE)
14574 mark_addressable (decl);
14575 rval = build_unary_op (ADDR_EXPR, decl, 0);
14578 /* Optimize for space over speed here. */
14579 if (! TYPE_USES_VIRTUAL_BASECLASSES (type)
14580 || flag_expensive_optimizations)
14581 flags |= LOOKUP_NONVIRTUAL;
14583 rval = build_delete (TREE_TYPE (rval), rval,
14584 sfk_complete_destructor, flags, 0);
14586 if (TYPE_USES_VIRTUAL_BASECLASSES (type)
14587 && ! TYPE_HAS_DESTRUCTOR (type))
14588 rval = build_compound_expr (tree_cons (NULL_TREE, rval,
14589 build_tree_list (NULL_TREE, build_vbase_delete (type, decl))));
14596 /* When a stmt has been parsed, this function is called. */
14601 /* Always assume this statement was not an expression statement. If
14602 it actually was an expression statement, its our callers
14603 responsibility to fix this up. */
14604 last_expr_type = NULL_TREE;
14607 /* DECL was originally constructed as a non-static member function,
14608 but turned out to be static. Update it accordingly. */
14611 revert_static_member_fn (decl)
14615 tree function = TREE_TYPE (decl);
14616 tree args = TYPE_ARG_TYPES (function);
14618 if (CP_TYPE_QUALS (TREE_TYPE (TREE_VALUE (args)))
14619 != TYPE_UNQUALIFIED)
14620 cp_error ("static member function `%#D' declared with type qualifiers",
14623 args = TREE_CHAIN (args);
14624 tmp = build_function_type (TREE_TYPE (function), args);
14625 tmp = build_qualified_type (tmp, CP_TYPE_QUALS (function));
14626 tmp = build_exception_variant (tmp,
14627 TYPE_RAISES_EXCEPTIONS (function));
14628 TREE_TYPE (decl) = tmp;
14629 if (DECL_ARGUMENTS (decl))
14630 DECL_ARGUMENTS (decl) = TREE_CHAIN (DECL_ARGUMENTS (decl));
14631 DECL_STATIC_FUNCTION_P (decl) = 1;
14634 /* Initialize the variables used during compilation of a C++
14638 push_cp_function_context (f)
14639 struct function *f;
14641 struct cp_language_function *p
14642 = ((struct cp_language_function *)
14643 xcalloc (1, sizeof (struct cp_language_function)));
14644 f->language = (struct language_function *) p;
14646 /* It takes an explicit call to expand_body to generate RTL for a
14650 /* Whenever we start a new function, we destroy temporaries in the
14652 current_stmt_tree ()->stmts_are_full_exprs_p = 1;
14655 /* Free the language-specific parts of F, now that we've finished
14656 compiling the function. */
14659 pop_cp_function_context (f)
14660 struct function *f;
14663 free (f->language);
14667 /* Mark P for GC. */
14670 mark_lang_function (p)
14671 struct cp_language_function *p;
14676 mark_c_language_function (&p->base);
14678 ggc_mark_tree (p->x_ctor_label);
14679 ggc_mark_tree (p->x_dtor_label);
14680 ggc_mark_tree (p->x_current_class_ptr);
14681 ggc_mark_tree (p->x_current_class_ref);
14682 ggc_mark_tree (p->x_eh_spec_try_block);
14684 mark_named_label_lists (&p->x_named_labels, &p->x_named_label_uses);
14685 mark_binding_level (&p->bindings);
14688 /* Mark the language-specific data in F for GC. */
14691 mark_cp_function_context (f)
14692 struct function *f;
14694 mark_lang_function ((struct cp_language_function *) f->language);
14701 enum tree_code code = TREE_CODE (t);
14702 if (code == IDENTIFIER_NODE)
14704 struct lang_identifier *li = (struct lang_identifier *) t;
14705 struct lang_id2 *li2 = li->x;
14706 ggc_mark_tree (li->namespace_bindings);
14707 ggc_mark_tree (li->bindings);
14708 ggc_mark_tree (li->class_value);
14709 ggc_mark_tree (li->class_template_info);
14713 ggc_mark_tree (li2->label_value);
14714 ggc_mark_tree (li2->implicit_decl);
14715 ggc_mark_tree (li2->error_locus);
14718 else if (code == CPLUS_BINDING)
14720 if (BINDING_HAS_LEVEL_P (t))
14721 mark_binding_level (&BINDING_LEVEL (t));
14723 ggc_mark_tree (BINDING_SCOPE (t));
14724 ggc_mark_tree (BINDING_VALUE (t));
14726 else if (code == OVERLOAD)
14727 ggc_mark_tree (OVL_FUNCTION (t));
14728 else if (code == TEMPLATE_PARM_INDEX)
14729 ggc_mark_tree (TEMPLATE_PARM_DECL (t));
14730 else if (TREE_CODE_CLASS (code) == 'd')
14732 struct lang_decl *ld = DECL_LANG_SPECIFIC (t);
14737 c_mark_lang_decl (&ld->decl_flags.base);
14738 if (!DECL_GLOBAL_CTOR_P (t)
14739 && !DECL_GLOBAL_DTOR_P (t)
14740 && !DECL_THUNK_P (t))
14741 ggc_mark_tree (ld->decl_flags.u2.access);
14742 else if (DECL_THUNK_P (t))
14743 ggc_mark_tree (ld->decl_flags.u2.vcall_offset);
14744 if (TREE_CODE (t) != NAMESPACE_DECL)
14745 ggc_mark_tree (ld->decl_flags.u.template_info);
14747 mark_binding_level (&NAMESPACE_LEVEL (t));
14748 if (CAN_HAVE_FULL_LANG_DECL_P (t))
14750 ggc_mark_tree (ld->befriending_classes);
14751 ggc_mark_tree (ld->context);
14752 ggc_mark_tree (ld->cloned_function);
14753 if (!DECL_OVERLOADED_OPERATOR_P (t))
14754 ggc_mark_tree (ld->u2.vtt_parm);
14755 if (TREE_CODE (t) == TYPE_DECL)
14756 ggc_mark_tree (ld->u.sorted_fields);
14757 else if (TREE_CODE (t) == FUNCTION_DECL
14758 && !DECL_PENDING_INLINE_P (t))
14759 mark_lang_function (DECL_SAVED_FUNCTION_DATA (t));
14763 else if (TREE_CODE_CLASS (code) == 't')
14765 struct lang_type *lt = TYPE_LANG_SPECIFIC (t);
14767 if (lt && !(TREE_CODE (t) == POINTER_TYPE
14768 && TREE_CODE (TREE_TYPE (t)) == METHOD_TYPE))
14771 ggc_mark_tree (lt->primary_base);
14772 ggc_mark_tree (lt->vfields);
14773 ggc_mark_tree (lt->vbases);
14774 ggc_mark_tree (lt->tags);
14775 ggc_mark_tree (lt->size);
14776 ggc_mark_tree (lt->pure_virtuals);
14777 ggc_mark_tree (lt->friend_classes);
14778 ggc_mark_tree (lt->rtti);
14779 ggc_mark_tree (lt->methods);
14780 ggc_mark_tree (lt->template_info);
14781 ggc_mark_tree (lt->befriending_classes);
14784 /* In the case of pointer-to-member function types, the
14785 TYPE_LANG_SPECIFIC is really just a tree. */
14786 ggc_mark_tree ((tree) lt);