1 /* Process declarations and variables for C compiler.
2 Copyright (C) 1988, 92-98, 1999 Free Software Foundation, Inc.
3 Contributed by Michael Tiemann (tiemann@cygnus.com)
5 This file is part of GNU CC.
7 GNU CC is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2, or (at your option)
12 GNU CC is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with GNU CC; see the file COPYING. If not, write to
19 the Free Software Foundation, 59 Temple Place - Suite 330,
20 Boston, MA 02111-1307, USA. */
23 /* Process declarations and symbol lookup for C front end.
24 Also constructs types; the standard scalar types at initialization,
25 and structure, union, array and enum types when they are declared. */
27 /* ??? not all decl nodes are given the most useful possible
28 line numbers. For example, the CONST_DECLs for enum values. */
48 #define obstack_chunk_alloc xmalloc
49 #define obstack_chunk_free free
51 extern struct obstack permanent_obstack;
53 extern int current_class_depth;
55 extern tree static_ctors, static_dtors;
57 extern tree global_namespace;
59 extern int (*valid_lang_attribute) PROTO ((tree, tree, tree, tree));
61 /* Use garbage collection. */
65 #ifndef WCHAR_UNSIGNED
66 #define WCHAR_UNSIGNED 0
69 #ifndef CHAR_TYPE_SIZE
70 #define CHAR_TYPE_SIZE BITS_PER_UNIT
73 #ifndef BOOL_TYPE_SIZE
74 #ifdef SLOW_BYTE_ACCESS
75 #define BOOL_TYPE_SIZE ((SLOW_BYTE_ACCESS) ? (POINTER_SIZE) : (CHAR_TYPE_SIZE))
77 #define BOOL_TYPE_SIZE CHAR_TYPE_SIZE
81 /* We let tm.h override the types used here, to handle trivial differences
82 such as the choice of unsigned int or long unsigned int for size_t.
83 When machines start needing nontrivial differences in the size type,
84 it would be best to do something here to figure out automatically
85 from other information what type to use. */
88 #define SIZE_TYPE "long unsigned int"
92 #define PTRDIFF_TYPE "long int"
96 #define WCHAR_TYPE "int"
99 static tree grokparms PROTO((tree, int));
100 static const char *redeclaration_error_message PROTO((tree, tree));
102 static void push_binding_level PROTO((struct binding_level *, int,
104 static void pop_binding_level PROTO((void));
105 static void suspend_binding_level PROTO((void));
106 static void resume_binding_level PROTO((struct binding_level *));
107 static struct binding_level *make_binding_level PROTO((void));
108 static void declare_namespace_level PROTO((void));
109 static void signal_catch PROTO((int)) ATTRIBUTE_NORETURN;
110 static void storedecls PROTO((tree));
111 static void require_complete_types_for_parms PROTO((tree));
112 static void push_overloaded_decl_1 PROTO((tree));
113 static int ambi_op_p PROTO((tree));
114 static int unary_op_p PROTO((tree));
115 static tree store_bindings PROTO((tree, tree));
116 static tree lookup_tag_reverse PROTO((tree, tree));
117 static tree obscure_complex_init PROTO((tree, tree));
118 static tree maybe_build_cleanup_1 PROTO((tree, tree));
119 static tree lookup_name_real PROTO((tree, int, int, int));
120 static void warn_extern_redeclared_static PROTO((tree, tree));
121 static void grok_reference_init PROTO((tree, tree, tree));
122 static tree grokfndecl PROTO((tree, tree, tree, tree, int,
123 enum overload_flags, tree,
124 tree, int, int, int, int, int, int, tree));
125 static tree grokvardecl PROTO((tree, tree, RID_BIT_TYPE *, int, int, tree));
126 static tree lookup_tag PROTO((enum tree_code, tree,
127 struct binding_level *, int));
128 static void set_identifier_type_value_with_scope
129 PROTO((tree, tree, struct binding_level *));
130 static void record_builtin_type PROTO((enum rid, const char *, tree));
131 static void record_unknown_type PROTO((tree, const char *));
132 static int member_function_or_else PROTO((tree, tree, const char *));
133 static void bad_specifiers PROTO((tree, const char *, int, int, int, int,
135 static void lang_print_error_function PROTO((const char *));
136 static tree maybe_process_template_type_declaration PROTO((tree, int, struct binding_level*));
137 static void check_for_uninitialized_const_var PROTO((tree));
138 static unsigned long typename_hash PROTO((hash_table_key));
139 static boolean typename_compare PROTO((hash_table_key, hash_table_key));
140 static void push_binding PROTO((tree, tree, struct binding_level*));
141 static int add_binding PROTO((tree, tree));
142 static void pop_binding PROTO((tree, tree));
143 static tree local_variable_p_walkfn PROTO((tree *, int *, void *));
144 static tree find_binding PROTO((tree, tree));
145 static tree select_decl PROTO((tree, int));
146 static int lookup_flags PROTO((int, int));
147 static tree qualify_lookup PROTO((tree, int));
148 static tree record_builtin_java_type PROTO((const char *, int));
149 static const char *tag_name PROTO((enum tag_types code));
150 static void find_class_binding_level PROTO((void));
151 static struct binding_level *innermost_nonclass_level PROTO((void));
152 static void warn_about_implicit_typename_lookup PROTO((tree, tree));
153 static int walk_namespaces_r PROTO((tree, walk_namespaces_fn, void *));
154 static int walk_globals_r PROTO((tree, void *));
155 static void add_decl_to_level PROTO((tree, struct binding_level *));
156 static tree make_label_decl PROTO((tree, int));
157 static void pop_label PROTO((tree));
158 static void pop_labels PROTO((tree));
159 static void maybe_deduce_size_from_array_init PROTO((tree, tree));
160 static void layout_var_decl PROTO((tree));
161 static void maybe_commonize_var PROTO((tree));
162 static tree check_initializer PROTO((tree, tree));
163 static void make_rtl_for_nonlocal_decl PROTO((tree, tree, const char *));
164 static void push_cp_function_context PROTO((struct function *));
165 static void pop_cp_function_context PROTO((struct function *));
166 static void mark_binding_level PROTO((void *));
167 static void mark_cp_function_context PROTO((struct function *));
168 static void mark_saved_scope PROTO((void *));
169 static void mark_lang_function PROTO((struct language_function *));
170 static void mark_stmt_tree PROTO((struct stmt_tree *));
171 static void save_function_data PROTO((tree));
172 static void check_function_type PROTO((tree));
173 static void destroy_local_static PROTO((tree));
174 static void destroy_local_var PROTO((tree));
175 static void finish_constructor_body PROTO((void));
176 static void finish_destructor_body PROTO((void));
177 static tree create_array_type_for_decl PROTO((tree, tree, tree));
179 #if defined (DEBUG_CP_BINDING_LEVELS)
180 static void indent PROTO((void));
183 /* Erroneous argument lists can use this *IFF* they do not modify it. */
184 tree error_mark_list;
186 /* The following symbols are subsumed in the cp_global_trees array, and
187 listed here individually for documentation purposes.
190 tree wchar_decl_node;
193 tree vtable_entry_type;
194 tree delta_type_node;
197 tree __baselist_desc_type_node;
198 tree __i_desc_type_node, __m_desc_type_node;
199 tree __t_desc_array_type, __i_desc_array_type, __m_desc_array_type;
201 tree __t_desc_type_node;
203 tree __tp_desc_type_node;
205 tree __access_mode_type_node;
206 tree __bltn_desc_type_node, __user_desc_type_node, __class_desc_type_node;
207 tree __ptr_desc_type_node, __attr_desc_type_node, __func_desc_type_node;
208 tree __ptmf_desc_type_node, __ptmd_desc_type_node;
210 Not needed yet? May be needed one day?
211 tree __bltn_desc_array_type, __user_desc_array_type, __class_desc_array_type;
212 tree __ptr_desc_array_type, __attr_dec_array_type, __func_desc_array_type;
213 tree __ptmf_desc_array_type, __ptmd_desc_array_type;
216 tree class_star_type_node;
217 tree class_type_node, record_type_node, union_type_node, enum_type_node;
218 tree unknown_type_node;
220 Array type `vtable_entry_type[]'
223 tree vtbl_ptr_type_node;
229 A FUNCTION_DECL which can call `abort'. Not necessarily the
230 one that the user will declare, but sufficient to be called
231 by routines that want to abort the program.
235 The FUNCTION_DECL for the default `::operator delete'.
237 tree global_delete_fndecl;
240 tree type_info_type_node, tinfo_fn_id, tinfo_fn_type;
244 tree cp_global_trees[CPTI_MAX];
246 /* Indicates that there is a type value in some namespace, although
247 that is not necessarily in scope at the moment. */
249 static tree global_type_node;
254 /* Expect only namespace names now. */
255 static int only_namespace_names;
257 /* If original DECL_RESULT of current function was a register,
258 but due to being an addressable named return value, would up
259 on the stack, this variable holds the named return value's
260 original location. */
262 #define original_result_rtx cp_function_chain->x_result_rtx
264 struct named_label_list
266 struct binding_level *binding_level;
269 const char *filename_o_goto;
271 struct named_label_list *next;
274 /* Used only for jumps to as-yet undefined labels, since jumps to
275 defined labels can have their validity checked by stmt.c. */
277 #define named_label_uses cp_function_chain->x_named_label_uses
279 /* A list of objects which have constructors or destructors
280 which reside in the global scope. The decl is stored in
281 the TREE_VALUE slot and the initializer is stored
282 in the TREE_PURPOSE slot. */
283 tree static_aggregates;
287 /* A node for the integer constants 2, and 3. */
289 tree integer_two_node, integer_three_node;
291 /* Parsing a function declarator leaves here a chain of structure
292 and enum types declared in the parmlist. */
294 static tree last_function_parm_tags;
296 /* Similar, for last_function_parm_tags. */
297 tree last_function_parms;
298 static tree current_function_parm_tags;
300 /* A list (chain of TREE_LIST nodes) of all LABEL_DECLs in the function
301 that have names. Here so we can clear out their names' definitions
302 at the end of the function. The TREE_VALUE is a LABEL_DECL; the
303 TREE_PURPOSE is the previous binding of the label. */
305 #define named_labels cp_function_chain->x_named_labels
307 /* The FUNCTION_DECL for the function currently being compiled,
308 or 0 if between functions. */
309 tree current_function_decl;
311 /* Set to 0 at beginning of a function definition, and whenever
312 a label (case or named) is defined. Set to value of expression
313 returned from function when that value can be transformed into
314 a named return value. */
316 tree current_function_return_value;
318 /* Nonzero means give `double' the same size as `float'. */
320 extern int flag_short_double;
322 /* Nonzero means don't recognize any builtin functions. */
324 extern int flag_no_builtin;
326 /* Nonzero means don't recognize the non-ANSI builtin functions.
329 extern int flag_no_nonansi_builtin;
331 /* Nonzero if we want to support huge (> 2^(sizeof(short)*8-1) bytes)
333 extern int flag_huge_objects;
335 /* Nonzero if we want to conserve space in the .o files. We do this
336 by putting uninitialized data and runtime initialized data into
337 .common instead of .data at the expense of not flagging multiple
339 extern int flag_conserve_space;
341 /* C and C++ flags are in decl2.c. */
343 /* Flag used when debugging spew.c */
345 extern int spew_debug;
347 /* A expression of value 0 with the same precision as a sizetype
349 tree signed_size_zero_node;
351 /* The name of the anonymous namespace, throughout this translation
353 tree anonymous_namespace_name;
356 /* For each binding contour we allocate a binding_level structure
357 which records the names defined in that contour.
360 1) one for each function definition,
361 where internal declarations of the parameters appear.
362 2) one for each compound statement,
363 to record its declarations.
365 The current meaning of a name can be found by searching the levels
366 from the current one out to the global one.
368 Off to the side, may be the class_binding_level. This exists only
369 to catch class-local declarations. It is otherwise nonexistent.
371 Also there may be binding levels that catch cleanups that must be
372 run when exceptions occur. Thus, to see whether a name is bound in
373 the current scope, it is not enough to look in the
374 CURRENT_BINDING_LEVEL. You should use lookup_name_current_level
377 /* Note that the information in the `names' component of the global contour
378 is duplicated in the IDENTIFIER_GLOBAL_VALUEs of all identifiers. */
382 /* A chain of _DECL nodes for all variables, constants, functions,
383 and typedef types. These are in the reverse of the order
384 supplied. There may be OVERLOADs on this list, too, but they
385 are wrapped in TREE_LISTs; the TREE_VALUE is the OVERLOAD. */
388 /* A list of structure, union and enum definitions, for looking up
390 It is a chain of TREE_LIST nodes, each of whose TREE_PURPOSE is a name,
391 or NULL_TREE; and whose TREE_VALUE is a RECORD_TYPE, UNION_TYPE,
392 or ENUMERAL_TYPE node.
394 C++: the TREE_VALUE nodes can be simple types for
395 component_bindings. */
398 /* A list of USING_DECL nodes. */
401 /* A list of used namespaces. PURPOSE is the namespace,
402 VALUE the common ancestor with this binding_level's namespace. */
403 tree using_directives;
405 /* If this binding level is the binding level for a class, then
406 class_shadowed is a TREE_LIST. The TREE_PURPOSE of each node
407 is the name of an entity bound in the class; the TREE_VALUE is
408 the IDENTIFIER_CLASS_VALUE before we entered the class. Thus,
409 when leaving class scope, we can restore the
410 IDENTIFIER_CLASS_VALUE by walking this list. The TREE_TYPE is
411 the DECL bound by this name in the class. */
414 /* Similar to class_shadowed, but for IDENTIFIER_TYPE_VALUE, and
415 is used for all binding levels. */
418 /* A TREE_LIST. Each TREE_VALUE is the LABEL_DECL for a local
419 label in this scope. The TREE_PURPOSE is the previous value of
420 the IDENTIFIER_LABEL VALUE. */
421 tree shadowed_labels;
423 /* For each level (except not the global one),
424 a chain of BLOCK nodes for all the levels
425 that were entered and exited one level down. */
428 /* The BLOCK node for this level, if one has been preallocated.
429 If 0, the BLOCK is allocated (if needed) when the level is popped. */
432 /* The binding level which this one is contained in (inherits from). */
433 struct binding_level *level_chain;
435 /* List of decls in `names' that have incomplete
436 structure or union types. */
439 /* List of VAR_DECLS saved from a previous for statement.
440 These would be dead in ANSI-conforming code, but might
441 be referenced in ARM-era code. These are stored in a
442 TREE_LIST; the TREE_VALUE is the actual declaration. */
443 tree dead_vars_from_for;
445 /* 1 for the level that holds the parameters of a function.
446 2 for the level that holds a class declaration.
447 3 for levels that hold parameter declarations. */
448 unsigned parm_flag : 4;
450 /* 1 means make a BLOCK for this level regardless of all else.
451 2 for temporary binding contours created by the compiler. */
454 /* Nonzero if this level "doesn't exist" for tags. */
455 unsigned tag_transparent : 1;
457 /* Nonzero if this level can safely have additional
458 cleanup-needing variables added to it. */
459 unsigned more_cleanups_ok : 1;
460 unsigned have_cleanups : 1;
462 /* Nonzero if this level is for storing the decls for template
463 parameters and generic decls; these decls will be discarded and
464 replaced with a TEMPLATE_DECL. */
465 unsigned pseudo_global : 1;
467 /* This is set for a namespace binding level. */
468 unsigned namespace_p : 1;
470 /* True if this level is that of a for-statement where we need to
471 worry about ambiguous (ARM or ANSI) scope rules. */
472 unsigned is_for_scope : 1;
474 /* True if this level corresponds to an EH region, as for a try block. */
475 unsigned eh_region : 1;
477 /* One bit left for this word. */
479 #if defined(DEBUG_CP_BINDING_LEVELS)
480 /* Binding depth at which this level began. */
481 unsigned binding_depth;
482 #endif /* defined(DEBUG_CP_BINDING_LEVELS) */
485 #define NULL_BINDING_LEVEL ((struct binding_level *) NULL)
487 /* The binding level currently in effect. */
489 #define current_binding_level \
491 ? cp_function_chain->bindings \
492 : scope_chain->bindings)
494 /* The binding level of the current class, if any. */
496 #define class_binding_level scope_chain->class_bindings
498 /* A chain of binding_level structures awaiting reuse. */
500 static struct binding_level *free_binding_level;
502 /* The outermost binding level, for names of file scope.
503 This is created when the compiler is started and exists
504 through the entire run. */
506 static struct binding_level *global_binding_level;
508 /* Nonzero means unconditionally make a BLOCK for the next level pushed. */
510 static int keep_next_level_flag;
512 #if defined(DEBUG_CP_BINDING_LEVELS)
513 static int binding_depth = 0;
514 static int is_class_level = 0;
521 for (i = 0; i < binding_depth*2; i++)
524 #endif /* defined(DEBUG_CP_BINDING_LEVELS) */
526 static tree pushdecl_with_scope PROTO((tree, struct binding_level *));
529 push_binding_level (newlevel, tag_transparent, keep)
530 struct binding_level *newlevel;
531 int tag_transparent, keep;
533 /* Add this level to the front of the chain (stack) of levels that
535 bzero ((char*) newlevel, sizeof (struct binding_level));
536 newlevel->level_chain = current_binding_level;
537 current_binding_level = newlevel;
538 newlevel->tag_transparent = tag_transparent;
539 newlevel->more_cleanups_ok = 1;
541 /* We are called before expand_start_bindings, but after
542 expand_eh_region_start for a try block; so we check this now,
543 before the EH block is covered up. */
544 newlevel->eh_region = is_eh_region ();
546 newlevel->keep = keep;
547 #if defined(DEBUG_CP_BINDING_LEVELS)
548 newlevel->binding_depth = binding_depth;
550 fprintf (stderr, "push %s level 0x%08x line %d\n",
551 (is_class_level) ? "class" : "block", newlevel, lineno);
554 #endif /* defined(DEBUG_CP_BINDING_LEVELS) */
557 /* Find the innermost enclosing class scope, and reset
558 CLASS_BINDING_LEVEL appropriately. */
561 find_class_binding_level ()
563 struct binding_level *level = current_binding_level;
565 while (level && level->parm_flag != 2)
566 level = level->level_chain;
567 if (level && level->parm_flag == 2)
568 class_binding_level = level;
570 class_binding_level = 0;
576 if (global_binding_level)
578 /* Cannot pop a level, if there are none left to pop. */
579 if (current_binding_level == global_binding_level)
580 my_friendly_abort (123);
582 /* Pop the current level, and free the structure for reuse. */
583 #if defined(DEBUG_CP_BINDING_LEVELS)
586 fprintf (stderr, "pop %s level 0x%08x line %d\n",
587 (is_class_level) ? "class" : "block",
588 current_binding_level, lineno);
589 if (is_class_level != (current_binding_level == class_binding_level))
592 fprintf (stderr, "XXX is_class_level != (current_binding_level == class_binding_level)\n");
595 #endif /* defined(DEBUG_CP_BINDING_LEVELS) */
597 register struct binding_level *level = current_binding_level;
598 current_binding_level = current_binding_level->level_chain;
599 level->level_chain = free_binding_level;
600 #if 0 /* defined(DEBUG_CP_BINDING_LEVELS) */
601 if (level->binding_depth != binding_depth)
603 #endif /* defined(DEBUG_CP_BINDING_LEVELS) */
604 free_binding_level = level;
605 find_class_binding_level ();
610 suspend_binding_level ()
612 if (class_binding_level)
613 current_binding_level = class_binding_level;
615 if (global_binding_level)
617 /* Cannot suspend a level, if there are none left to suspend. */
618 if (current_binding_level == global_binding_level)
619 my_friendly_abort (123);
621 /* Suspend the current level. */
622 #if defined(DEBUG_CP_BINDING_LEVELS)
625 fprintf (stderr, "suspend %s level 0x%08x line %d\n",
626 (is_class_level) ? "class" : "block",
627 current_binding_level, lineno);
628 if (is_class_level != (current_binding_level == class_binding_level))
631 fprintf (stderr, "XXX is_class_level != (current_binding_level == class_binding_level)\n");
634 #endif /* defined(DEBUG_CP_BINDING_LEVELS) */
635 current_binding_level = current_binding_level->level_chain;
636 find_class_binding_level ();
640 resume_binding_level (b)
641 struct binding_level *b;
643 /* Resuming binding levels is meant only for namespaces,
644 and those cannot nest into classes. */
645 my_friendly_assert(!class_binding_level, 386);
646 /* Also, resuming a non-directly nested namespace is a no-no. */
647 my_friendly_assert(b->level_chain == current_binding_level, 386);
648 current_binding_level = b;
649 #if defined(DEBUG_CP_BINDING_LEVELS)
650 b->binding_depth = binding_depth;
652 fprintf (stderr, "resume %s level 0x%08x line %d\n",
653 (is_class_level) ? "class" : "block", b, lineno);
656 #endif /* defined(DEBUG_CP_BINDING_LEVELS) */
659 /* Create a new `struct binding_level'. */
662 struct binding_level *
663 make_binding_level ()
666 return (struct binding_level *) xmalloc (sizeof (struct binding_level));
669 /* Nonzero if we are currently in the global binding level. */
674 return current_binding_level == global_binding_level;
677 /* Return the innermost binding level that is not for a class scope. */
679 static struct binding_level *
680 innermost_nonclass_level ()
682 struct binding_level *b;
684 b = current_binding_level;
685 while (b->parm_flag == 2)
691 /* Nonzero if we are currently in a toplevel binding level. This
692 means either the global binding level or a namespace in a toplevel
693 binding level. Since there are no non-toplevel namespace levels,
694 this really means any namespace or pseudo-global level. We also
695 include a class whose context is toplevel. */
698 toplevel_bindings_p ()
700 struct binding_level *b = innermost_nonclass_level ();
702 return b->namespace_p || b->pseudo_global;
705 /* Nonzero if this is a namespace scope, or if we are defining a class
706 which is itself at namespace scope, or whose enclosing class is
707 such a class, etc. */
710 namespace_bindings_p ()
712 struct binding_level *b = innermost_nonclass_level ();
714 return b->namespace_p;
717 /* If KEEP is non-zero, make a BLOCK node for the next binding level,
718 unconditionally. Otherwise, use the normal logic to decide whether
719 or not to create a BLOCK. */
722 keep_next_level (keep)
725 keep_next_level_flag = keep;
728 /* Nonzero if the current level needs to have a BLOCK made. */
733 return (current_binding_level->blocks != NULL_TREE
734 || current_binding_level->keep
735 || current_binding_level->names != NULL_TREE
736 || (current_binding_level->tags != NULL_TREE
737 && !current_binding_level->tag_transparent));
741 declare_pseudo_global_level ()
743 current_binding_level->pseudo_global = 1;
747 declare_namespace_level ()
749 current_binding_level->namespace_p = 1;
753 pseudo_global_level_p ()
755 return current_binding_level->pseudo_global;
759 set_class_shadows (shadows)
762 class_binding_level->class_shadowed = shadows;
765 /* Enter a new binding level.
766 If TAG_TRANSPARENT is nonzero, do so only for the name space of variables,
767 not for that of tags. */
770 pushlevel (tag_transparent)
773 struct binding_level *newlevel;
775 if (current_function && !doing_semantic_analysis_p ())
778 /* Reuse or create a struct for this binding level. */
779 #if defined(DEBUG_CP_BINDING_LEVELS)
781 #else /* !defined(DEBUG_CP_BINDING_LEVELS) */
782 if (free_binding_level)
783 #endif /* !defined(DEBUG_CP_BINDING_LEVELS) */
785 newlevel = free_binding_level;
786 free_binding_level = free_binding_level->level_chain;
789 newlevel = make_binding_level ();
791 push_binding_level (newlevel, tag_transparent, keep_next_level_flag);
792 GNU_xref_start_scope ((HOST_WIDE_INT) newlevel);
793 keep_next_level_flag = 0;
797 note_level_for_for ()
799 current_binding_level->is_for_scope = 1;
802 /* For a binding between a name and an entity at a block scope,
803 this is the `struct binding_level' for the block. */
804 #define BINDING_LEVEL(NODE) \
805 (((struct tree_binding*)NODE)->scope.level)
807 /* Make DECL the innermost binding for ID. The LEVEL is the binding
808 level at which this declaration is being bound. */
811 push_binding (id, decl, level)
814 struct binding_level* level;
818 binding = make_node (CPLUS_BINDING);
820 /* Now, fill in the binding information. */
821 BINDING_VALUE (binding) = decl;
822 BINDING_TYPE (binding) = NULL_TREE;
823 BINDING_LEVEL (binding) = level;
824 INHERITED_VALUE_BINDING_P (binding) = 0;
825 LOCAL_BINDING_P (binding) = (level != class_binding_level);
826 BINDING_HAS_LEVEL_P (binding) = 1;
828 /* And put it on the front of the list of bindings for ID. */
829 TREE_CHAIN (binding) = IDENTIFIER_BINDING (id);
830 IDENTIFIER_BINDING (id) = binding;
833 /* ID is already bound in the current scope. But, DECL is an
834 additional binding for ID in the same scope. This is the `struct
835 stat' hack whereby a non-typedef class-name or enum-name can be
836 bound at the same level as some other kind of entity. It's the
837 responsibility of the caller to check that inserting this name is
838 legal here. Returns nonzero if the new binding was successful. */
840 add_binding (id, decl)
844 tree binding = IDENTIFIER_BINDING (id);
847 if (TREE_CODE (decl) == TYPE_DECL && DECL_ARTIFICIAL (decl))
848 /* The new name is the type name. */
849 BINDING_TYPE (binding) = decl;
850 else if (!BINDING_VALUE (binding))
851 /* This situation arises when push_class_level_binding moves an
852 inherited type-binding out of the way to make room for a new
854 BINDING_VALUE (binding) = decl;
855 else if (TREE_CODE (BINDING_VALUE (binding)) == TYPE_DECL
856 && DECL_ARTIFICIAL (BINDING_VALUE (binding)))
858 /* The old binding was a type name. It was placed in
859 BINDING_VALUE because it was thought, at the point it was
860 declared, to be the only entity with such a name. Move the
861 type name into the type slot; it is now hidden by the new
863 BINDING_TYPE (binding) = BINDING_VALUE (binding);
864 BINDING_VALUE (binding) = decl;
865 INHERITED_VALUE_BINDING_P (binding) = 0;
867 else if (TREE_CODE (BINDING_VALUE (binding)) == TYPE_DECL
868 && TREE_CODE (decl) == TYPE_DECL
869 && DECL_NAME (decl) == DECL_NAME (BINDING_VALUE (binding))
870 && same_type_p (TREE_TYPE (decl),
871 TREE_TYPE (BINDING_VALUE (binding))))
872 /* We have two typedef-names, both naming the same type to have
873 the same name. This is OK because of:
877 In a given scope, a typedef specifier can be used to redefine
878 the name of any type declared in that scope to refer to the
879 type to which it already refers. */
883 cp_error ("declaration of `%#D'", decl);
884 cp_error_at ("conflicts with previous declaration `%#D'",
885 BINDING_VALUE (binding));
892 /* Add DECL to the list of things declared in B. */
895 add_decl_to_level (decl, b)
897 struct binding_level *b;
899 /* We build up the list in reverse order, and reverse it later if
901 TREE_CHAIN (decl) = b->names;
905 /* Bind DECL to ID in the current_binding_level, assumed to be a local
906 binding level. If PUSH_USING is set in FLAGS, we know that DECL
907 doesn't really belong to this binding level, that it got here
908 through a using-declaration. */
911 push_local_binding (id, decl, flags)
916 struct binding_level *b;
918 /* Skip over any local classes. This makes sense if we call
919 push_local_binding with a friend decl of a local class. */
920 b = current_binding_level;
921 while (b->parm_flag == 2)
924 if (lookup_name_current_level (id))
926 /* Supplement the existing binding. */
927 if (!add_binding (id, decl))
928 /* It didn't work. Something else must be bound at this
929 level. Do not add DECL to the list of things to pop
934 /* Create a new binding. */
935 push_binding (id, decl, b);
937 if (TREE_CODE (decl) == OVERLOAD || (flags & PUSH_USING))
938 /* We must put the OVERLOAD into a TREE_LIST since the
939 TREE_CHAIN of an OVERLOAD is already used. Similarly for
940 decls that got here through a using-declaration. */
941 decl = build_tree_list (NULL_TREE, decl);
943 /* And put DECL on the list of things declared by the current
945 add_decl_to_level (decl, b);
948 /* Bind DECL to ID in the class_binding_level. Returns nonzero if the
949 binding was successful. */
952 push_class_binding (id, decl)
957 tree binding = IDENTIFIER_BINDING (id);
960 /* Note that we declared this value so that we can issue an error if
961 this an illegal redeclaration of a name already used for some
963 note_name_declared_in_class (id, decl);
965 if (binding && BINDING_LEVEL (binding) == class_binding_level)
966 /* Supplement the existing binding. */
967 result = add_binding (id, decl);
969 /* Create a new binding. */
970 push_binding (id, decl, class_binding_level);
972 /* Update the IDENTIFIER_CLASS_VALUE for this ID to be the
973 class-level declaration. Note that we do not use DECL here
974 because of the possibility of the `struct stat' hack; if DECL is
975 a class-name or enum-name we might prefer a field-name, or some
977 IDENTIFIER_CLASS_VALUE (id) = BINDING_VALUE (IDENTIFIER_BINDING (id));
979 /* If this is a binding from a base class, mark it as such. */
980 binding = IDENTIFIER_BINDING (id);
981 if (BINDING_VALUE (binding) == decl && TREE_CODE (decl) != TREE_LIST)
983 /* Any implicit typename must be from a base-class. The
984 context for an implicit typename declaration is always
985 the derived class in which the lookup was done, so the checks
986 based on the context of DECL below will not trigger. */
987 if (IMPLICIT_TYPENAME_TYPE_DECL_P (decl))
988 INHERITED_VALUE_BINDING_P (binding) = 1;
991 if (TREE_CODE (decl) == OVERLOAD)
992 context = DECL_REAL_CONTEXT (OVL_CURRENT (decl));
995 my_friendly_assert (TREE_CODE_CLASS (TREE_CODE (decl)) == 'd',
997 context = DECL_REAL_CONTEXT (decl);
1000 if (is_properly_derived_from (current_class_type, context))
1001 INHERITED_VALUE_BINDING_P (binding) = 1;
1003 INHERITED_VALUE_BINDING_P (binding) = 0;
1006 else if (BINDING_VALUE (binding) == decl)
1007 /* We only encounter a TREE_LIST when push_class_decls detects an
1008 ambiguity. Such an ambiguity can be overridden by a definition
1010 INHERITED_VALUE_BINDING_P (binding) = 1;
1015 /* Remove the binding for DECL which should be the innermost binding
1019 pop_binding (id, decl)
1025 if (id == NULL_TREE)
1026 /* It's easiest to write the loops that call this function without
1027 checking whether or not the entities involved have names. We
1028 get here for such an entity. */
1031 /* Get the innermost binding for ID. */
1032 binding = IDENTIFIER_BINDING (id);
1034 /* The name should be bound. */
1035 my_friendly_assert (binding != NULL_TREE, 0);
1037 /* The DECL will be either the ordinary binding or the type
1038 binding for this identifier. Remove that binding. */
1039 if (BINDING_VALUE (binding) == decl)
1040 BINDING_VALUE (binding) = NULL_TREE;
1041 else if (BINDING_TYPE (binding) == decl)
1042 BINDING_TYPE (binding) = NULL_TREE;
1044 my_friendly_abort (0);
1046 if (!BINDING_VALUE (binding) && !BINDING_TYPE (binding))
1047 /* We're completely done with the innermost binding for this
1048 identifier. Unhook it from the list of bindings. */
1049 IDENTIFIER_BINDING (id) = TREE_CHAIN (binding);
1052 /* When a label goes out of scope, check to see if that label was used
1053 in a valid manner, and issue any appropriate warnings or errors. */
1059 tree label = TREE_VALUE (link);
1061 if (!processing_template_decl && doing_semantic_analysis_p ())
1063 if (DECL_INITIAL (label) == NULL_TREE)
1065 cp_error_at ("label `%D' used but not defined", label);
1066 /* Avoid crashing later. */
1067 define_label (input_filename, 1, DECL_NAME (label));
1069 else if (warn_unused && !TREE_USED (label))
1070 cp_warning_at ("label `%D' defined but not used", label);
1073 SET_IDENTIFIER_LABEL_VALUE (DECL_NAME (label), TREE_PURPOSE (link));
1076 /* At the end of a function, all labels declared within the fucntion
1077 go out of scope. BLOCK is the top-level block for the
1086 /* Clear out the definitions of all label names, since their scopes
1088 for (link = named_labels; link; link = TREE_CHAIN (link))
1091 /* Put the labels into the "variables" of the top-level block,
1092 so debugger can see them. */
1093 TREE_CHAIN (TREE_VALUE (link)) = BLOCK_VARS (block);
1094 BLOCK_VARS (block) = TREE_VALUE (link);
1097 named_labels = NULL_TREE;
1100 /* Exit a binding level.
1101 Pop the level off, and restore the state of the identifier-decl mappings
1102 that were in effect when this level was entered.
1104 If KEEP == 1, this level had explicit declarations, so
1105 and create a "block" (a BLOCK node) for the level
1106 to record its declarations and subblocks for symbol table output.
1108 If FUNCTIONBODY is nonzero, this level is the body of a function,
1109 so create a block as if KEEP were set and also clear out all
1112 If REVERSE is nonzero, reverse the order of decls before putting
1113 them into the BLOCK. */
1116 poplevel (keep, reverse, functionbody)
1122 /* The chain of decls was accumulated in reverse order.
1123 Put it into forward order, just for cleanliness. */
1125 int tmp = functionbody;
1126 int real_functionbody;
1129 tree block = NULL_TREE;
1131 int block_previously_created;
1132 int leaving_for_scope;
1134 if (current_function && !doing_semantic_analysis_p ())
1137 my_friendly_assert (current_binding_level->parm_flag != 2,
1140 real_functionbody = (current_binding_level->keep == 2
1141 ? ((functionbody = 0), tmp) : functionbody);
1142 tags = functionbody >= 0 ? current_binding_level->tags : 0;
1143 subblocks = functionbody >= 0 ? current_binding_level->blocks : 0;
1145 my_friendly_assert (!current_binding_level->class_shadowed,
1148 /* We used to use KEEP == 2 to indicate that the new block should go
1149 at the beginning of the list of blocks at this binding level,
1150 rather than the end. This hack is no longer used. */
1151 my_friendly_assert (keep == 0 || keep == 1, 0);
1153 GNU_xref_end_scope ((HOST_WIDE_INT) current_binding_level,
1154 (HOST_WIDE_INT) current_binding_level->level_chain,
1155 current_binding_level->parm_flag,
1156 current_binding_level->keep);
1158 if (current_binding_level->keep == 1)
1161 /* Get the decls in the order they were written.
1162 Usually current_binding_level->names is in reverse order.
1163 But parameter decls were previously put in forward order. */
1166 current_binding_level->names
1167 = decls = nreverse (current_binding_level->names);
1169 decls = current_binding_level->names;
1171 /* Output any nested inline functions within this block
1172 if they weren't already output. */
1173 for (decl = decls; decl; decl = TREE_CHAIN (decl))
1174 if (TREE_CODE (decl) == FUNCTION_DECL
1175 && ! TREE_ASM_WRITTEN (decl)
1176 && DECL_INITIAL (decl) != NULL_TREE
1177 && TREE_ADDRESSABLE (decl)
1178 && decl_function_context (decl) == current_function_decl)
1180 /* If this decl was copied from a file-scope decl
1181 on account of a block-scope extern decl,
1182 propagate TREE_ADDRESSABLE to the file-scope decl. */
1183 if (DECL_ABSTRACT_ORIGIN (decl) != NULL_TREE)
1184 TREE_ADDRESSABLE (DECL_ABSTRACT_ORIGIN (decl)) = 1;
1187 push_function_context ();
1188 output_inline_function (decl);
1189 pop_function_context ();
1193 /* When not in function-at-a-time mode, expand_end_bindings will
1194 warn about unused variables. But, in function-at-a-time mode
1195 expand_end_bindings is not passed the list of variables in the
1196 current scope, and therefore no warning is emitted. So, we
1197 explicitly warn here. */
1198 if (!processing_template_decl)
1199 warn_about_unused_variables (getdecls ());
1201 /* If there were any declarations or structure tags in that level,
1202 or if this level is a function body,
1203 create a BLOCK to record them for the life of this function. */
1205 block_previously_created = (current_binding_level->this_block != NULL_TREE);
1206 if (block_previously_created)
1207 block = current_binding_level->this_block;
1208 else if (keep == 1 || functionbody)
1209 block = make_node (BLOCK);
1210 if (block != NULL_TREE)
1212 if (block_previously_created)
1214 if (decls || tags || subblocks)
1216 if (BLOCK_VARS (block))
1217 warning ("internal compiler error: debugging info corrupted");
1219 BLOCK_VARS (block) = decls;
1221 /* We can have previous subblocks and new subblocks when
1222 doing fixup_gotos with complex cleanups. We chain the new
1223 subblocks onto the end of any pre-existing subblocks. */
1224 BLOCK_SUBBLOCKS (block) = chainon (BLOCK_SUBBLOCKS (block),
1230 BLOCK_VARS (block) = decls;
1231 BLOCK_SUBBLOCKS (block) = subblocks;
1235 /* In each subblock, record that this is its superior. */
1237 for (link = subblocks; link; link = TREE_CHAIN (link))
1238 BLOCK_SUPERCONTEXT (link) = block;
1240 /* We still support the old for-scope rules, whereby the variables
1241 in a for-init statement were in scope after the for-statement
1242 ended. We only use the new rules in flag_new_for_scope is
1245 = current_binding_level->is_for_scope && flag_new_for_scope == 1;
1247 /* Remove declarations for all the DECLs in this level. */
1248 for (link = decls; link; link = TREE_CHAIN (link))
1250 if (leaving_for_scope && TREE_CODE (link) == VAR_DECL)
1253 = TREE_CHAIN (IDENTIFIER_BINDING (DECL_NAME (link)));
1257 ns_binding = IDENTIFIER_NAMESPACE_VALUE (DECL_NAME (link));
1259 ns_binding = NULL_TREE;
1262 && (BINDING_LEVEL (outer_binding)
1263 == current_binding_level->level_chain))
1264 /* We have something like:
1269 and we are leaving the `for' scope. There's no reason to
1270 keep the binding of the inner `i' in this case. */
1271 pop_binding (DECL_NAME (link), link);
1272 else if ((outer_binding
1273 && (TREE_CODE (BINDING_VALUE (outer_binding))
1276 && TREE_CODE (ns_binding) == TYPE_DECL))
1277 /* Here, we have something like:
1285 We must pop the for-scope binding so we know what's a
1286 type and what isn't. */
1287 pop_binding (DECL_NAME (link), link);
1290 /* Mark this VAR_DECL as dead so that we can tell we left it
1291 there only for backward compatibility. */
1292 DECL_DEAD_FOR_LOCAL (link) = 1;
1294 /* Keep track of what should of have happenned when we
1295 popped the binding. */
1296 if (outer_binding && BINDING_VALUE (outer_binding))
1297 DECL_SHADOWED_FOR_VAR (link)
1298 = BINDING_VALUE (outer_binding);
1300 /* Add it to the list of dead variables in the next
1301 outermost binding to that we can remove these when we
1302 leave that binding. */
1303 current_binding_level->level_chain->dead_vars_from_for
1304 = tree_cons (NULL_TREE, link,
1305 current_binding_level->level_chain->
1306 dead_vars_from_for);
1308 /* Although we don't pop the CPLUS_BINDING, we do clear
1309 its BINDING_LEVEL since the level is going away now. */
1310 BINDING_LEVEL (IDENTIFIER_BINDING (DECL_NAME (link)))
1316 /* Remove the binding. */
1318 if (TREE_CODE (decl) == TREE_LIST)
1319 decl = TREE_VALUE (decl);
1320 if (TREE_CODE_CLASS (TREE_CODE (decl)) == 'd')
1321 pop_binding (DECL_NAME (decl), decl);
1322 else if (TREE_CODE (decl) == OVERLOAD)
1323 pop_binding (DECL_NAME (OVL_FUNCTION (decl)), decl);
1325 my_friendly_abort (0);
1329 /* Remove declarations for any `for' variables from inner scopes
1330 that we kept around. */
1331 for (link = current_binding_level->dead_vars_from_for;
1332 link; link = TREE_CHAIN (link))
1333 pop_binding (DECL_NAME (TREE_VALUE (link)), TREE_VALUE (link));
1335 /* Restore the IDENTIFIER_TYPE_VALUEs. */
1336 for (link = current_binding_level->type_shadowed;
1337 link; link = TREE_CHAIN (link))
1338 SET_IDENTIFIER_TYPE_VALUE (TREE_PURPOSE (link), TREE_VALUE (link));
1340 /* Restore the IDENTIFIER_LABEL_VALUEs for local labels. */
1341 for (link = current_binding_level->shadowed_labels;
1343 link = TREE_CHAIN (link))
1346 /* There may be OVERLOADs (wrapped in TREE_LISTs) on the BLOCK_VARs
1347 list if a `using' declaration put them there. The debugging
1348 back-ends won't understand OVERLOAD, so we remove them here.
1349 Because the BLOCK_VARS are (temporarily) shared with
1350 CURRENT_BINDING_LEVEL->NAMES we must do this fixup after we have
1351 popped all the bindings. */
1356 for (d = &BLOCK_VARS (block); *d; )
1358 if (TREE_CODE (*d) == TREE_LIST)
1359 *d = TREE_CHAIN (*d);
1361 d = &TREE_CHAIN (*d);
1365 /* If the level being exited is the top level of a function,
1366 check over all the labels. */
1369 /* Since this is the top level block of a function, the vars are
1370 the function's parameters. Don't leave them in the BLOCK
1371 because they are found in the FUNCTION_DECL instead. */
1372 BLOCK_VARS (block) = 0;
1376 /* Any uses of undefined labels now operate under constraints
1377 of next binding contour. */
1378 if (current_function)
1380 struct binding_level *level_chain;
1381 level_chain = current_binding_level->level_chain;
1384 struct named_label_list *labels;
1385 for (labels = named_label_uses; labels; labels = labels->next)
1386 if (labels->binding_level == current_binding_level)
1388 labels->binding_level = level_chain;
1389 labels->names_in_scope = level_chain->names;
1394 tmp = current_binding_level->keep;
1396 pop_binding_level ();
1398 DECL_INITIAL (current_function_decl) = block;
1401 if (!block_previously_created)
1402 current_binding_level->blocks
1403 = chainon (current_binding_level->blocks, block);
1405 /* If we did not make a block for the level just exited,
1406 any blocks made for inner levels
1407 (since they cannot be recorded as subblocks in that level)
1408 must be carried forward so they will later become subblocks
1409 of something else. */
1411 current_binding_level->blocks
1412 = chainon (current_binding_level->blocks, subblocks);
1414 /* Each and every BLOCK node created here in `poplevel' is important
1415 (e.g. for proper debugging information) so if we created one
1416 earlier, mark it as "used". */
1418 TREE_USED (block) = 1;
1420 /* Take care of compiler's internal binding structures. */
1426 = add_scope_stmt (/*begin_p=*/0, /*partial_p=*/1);
1429 SCOPE_STMT_BLOCK (TREE_PURPOSE (scope_stmts)) = block;
1430 SCOPE_STMT_BLOCK (TREE_VALUE (scope_stmts)) = block;
1433 block = poplevel (keep, reverse, functionbody);
1439 /* Delete the node BLOCK from the current binding level.
1440 This is used for the block inside a stmt expr ({...})
1441 so that the block can be reinserted where appropriate. */
1444 delete_block (block)
1448 if (current_binding_level->blocks == block)
1449 current_binding_level->blocks = TREE_CHAIN (block);
1450 for (t = current_binding_level->blocks; t;)
1452 if (TREE_CHAIN (t) == block)
1453 TREE_CHAIN (t) = TREE_CHAIN (block);
1457 TREE_CHAIN (block) = NULL_TREE;
1458 /* Clear TREE_USED which is always set by poplevel.
1459 The flag is set again if insert_block is called. */
1460 TREE_USED (block) = 0;
1463 /* Insert BLOCK at the end of the list of subblocks of the
1464 current binding level. This is used when a BIND_EXPR is expanded,
1465 to handle the BLOCK node inside the BIND_EXPR. */
1468 insert_block (block)
1471 TREE_USED (block) = 1;
1472 current_binding_level->blocks
1473 = chainon (current_binding_level->blocks, block);
1476 /* Set the BLOCK node for the innermost scope
1477 (the one we are currently in). */
1481 register tree block;
1483 current_binding_level->this_block = block;
1486 /* Do a pushlevel for class declarations. */
1491 register struct binding_level *newlevel;
1493 /* Reuse or create a struct for this binding level. */
1494 #if defined(DEBUG_CP_BINDING_LEVELS)
1496 #else /* !defined(DEBUG_CP_BINDING_LEVELS) */
1497 if (free_binding_level)
1498 #endif /* !defined(DEBUG_CP_BINDING_LEVELS) */
1500 newlevel = free_binding_level;
1501 free_binding_level = free_binding_level->level_chain;
1504 newlevel = make_binding_level ();
1506 #if defined(DEBUG_CP_BINDING_LEVELS)
1508 #endif /* defined(DEBUG_CP_BINDING_LEVELS) */
1510 push_binding_level (newlevel, 0, 0);
1512 class_binding_level = current_binding_level;
1513 class_binding_level->parm_flag = 2;
1516 /* ...and a poplevel for class declarations. */
1521 register struct binding_level *level = class_binding_level;
1524 my_friendly_assert (level != 0, 354);
1526 /* If we're leaving a toplevel class, don't bother to do the setting
1527 of IDENTIFIER_CLASS_VALUE to NULL_TREE, since first of all this slot
1528 shouldn't even be used when current_class_type isn't set, and second,
1529 if we don't touch it here, we're able to use the cache effect if the
1530 next time we're entering a class scope, it is the same class. */
1531 if (current_class_depth != 1)
1533 struct binding_level* b;
1535 /* Clear out our IDENTIFIER_CLASS_VALUEs. */
1536 for (shadowed = level->class_shadowed;
1538 shadowed = TREE_CHAIN (shadowed))
1539 IDENTIFIER_CLASS_VALUE (TREE_PURPOSE (shadowed)) = NULL_TREE;
1541 /* Find the next enclosing class, and recreate
1542 IDENTIFIER_CLASS_VALUEs appropriate for that class. */
1543 b = level->level_chain;
1544 while (b && b->parm_flag != 2)
1548 for (shadowed = b->class_shadowed;
1550 shadowed = TREE_CHAIN (shadowed))
1554 t = IDENTIFIER_BINDING (TREE_PURPOSE (shadowed));
1555 while (t && BINDING_LEVEL (t) != b)
1559 IDENTIFIER_CLASS_VALUE (TREE_PURPOSE (shadowed))
1560 = BINDING_VALUE (t);
1564 /* Remember to save what IDENTIFIER's were bound in this scope so we
1565 can recover from cache misses. */
1567 previous_class_type = current_class_type;
1568 previous_class_values = class_binding_level->class_shadowed;
1570 for (shadowed = level->type_shadowed;
1572 shadowed = TREE_CHAIN (shadowed))
1573 SET_IDENTIFIER_TYPE_VALUE (TREE_PURPOSE (shadowed), TREE_VALUE (shadowed));
1575 /* Remove the bindings for all of the class-level declarations. */
1576 for (shadowed = level->class_shadowed;
1578 shadowed = TREE_CHAIN (shadowed))
1579 pop_binding (TREE_PURPOSE (shadowed), TREE_TYPE (shadowed));
1581 GNU_xref_end_scope ((HOST_WIDE_INT) class_binding_level,
1582 (HOST_WIDE_INT) class_binding_level->level_chain,
1583 class_binding_level->parm_flag,
1584 class_binding_level->keep);
1586 /* Now, pop out of the binding level which we created up in the
1587 `pushlevel_class' routine. */
1588 #if defined(DEBUG_CP_BINDING_LEVELS)
1590 #endif /* defined(DEBUG_CP_BINDING_LEVELS) */
1592 pop_binding_level ();
1595 /* We are entering the scope of a class. Clear IDENTIFIER_CLASS_VALUE
1596 for any names in enclosing classes. */
1599 clear_identifier_class_values ()
1603 if (!class_binding_level)
1606 for (t = class_binding_level->class_shadowed;
1609 IDENTIFIER_CLASS_VALUE (TREE_PURPOSE (t)) = NULL_TREE;
1612 /* Returns non-zero if T is a virtual function table. */
1615 vtable_decl_p (t, data)
1617 void *data ATTRIBUTE_UNUSED;
1619 return (TREE_CODE (t) == VAR_DECL && DECL_VIRTUAL_P (t));
1622 /* Returns non-zero if T is a TYPE_DECL for a type with virtual
1626 vtype_decl_p (t, data)
1628 void *data ATTRIBUTE_UNUSED;
1630 return (TREE_CODE (t) == TYPE_DECL
1631 && TREE_TYPE (t) != error_mark_node
1632 && TYPE_LANG_SPECIFIC (TREE_TYPE (t))
1633 && CLASSTYPE_VSIZE (TREE_TYPE (t)));
1636 /* Return the declarations that are members of the namespace NS. */
1639 cp_namespace_decls (ns)
1642 return NAMESPACE_LEVEL (ns)->names;
1645 /* Walk all the namespaces contained NAMESPACE, including NAMESPACE
1646 itself, calling F for each. The DATA is passed to F as well. */
1649 walk_namespaces_r (namespace, f, data)
1651 walk_namespaces_fn f;
1657 result |= (*f) (namespace, data);
1659 for (current = cp_namespace_decls (namespace);
1661 current = TREE_CHAIN (current))
1663 if (TREE_CODE (current) != NAMESPACE_DECL
1664 || DECL_NAMESPACE_ALIAS (current))
1666 if (!DECL_LANG_SPECIFIC (current))
1669 my_friendly_assert (current == std_node, 393);
1673 /* We found a namespace. */
1674 result |= walk_namespaces_r (current, f, data);
1680 /* Walk all the namespaces, calling F for each. The DATA is passed to
1684 walk_namespaces (f, data)
1685 walk_namespaces_fn f;
1688 return walk_namespaces_r (global_namespace, f, data);
1691 struct walk_globals_data {
1692 walk_globals_pred p;
1697 /* Walk the global declarations in NAMESPACE. Whenever one is found
1698 for which P returns non-zero, call F with its address. If any call
1699 to F returns a non-zero value, return a non-zero value. */
1702 walk_globals_r (namespace, data)
1706 struct walk_globals_data* wgd = (struct walk_globals_data *) data;
1707 walk_globals_pred p = wgd->p;
1708 walk_globals_fn f = wgd->f;
1709 void *d = wgd->data;
1713 t = &NAMESPACE_LEVEL (namespace)->names;
1720 result |= (*f) (t, d);
1722 /* If F changed *T, then *T still points at the next item to
1725 t = &TREE_CHAIN (*t);
1731 /* Walk the global declarations. Whenever one is found for which P
1732 returns non-zero, call F with its address. If any call to F
1733 returns a non-zero value, return a non-zero value. */
1736 walk_globals (p, f, data)
1737 walk_globals_pred p;
1741 struct walk_globals_data wgd;
1746 return walk_namespaces (walk_globals_r, &wgd);
1749 /* Call wrapup_globals_declarations for the globals in NAMESPACE. If
1750 DATA is non-NULL, this is the last time we will call
1751 wrapup_global_declarations for this NAMESPACE. */
1754 wrapup_globals_for_namespace (namespace, data)
1758 tree globals = cp_namespace_decls (namespace);
1759 int len = list_length (globals);
1760 tree *vec = (tree *) alloca (sizeof (tree) * len);
1764 int last_time = (data != 0);
1766 if (last_time && namespace == global_namespace)
1767 /* Let compile_file handle the global namespace. */
1770 /* Process the decls in reverse order--earliest first.
1771 Put them into VEC from back to front, then take out from front. */
1773 for (i = 0, decl = globals; i < len; i++, decl = TREE_CHAIN (decl))
1774 vec[len - i - 1] = decl;
1778 check_global_declarations (vec, len);
1782 /* Temporarily mark vtables as external. That prevents
1783 wrapup_global_declarations from writing them out; we must process
1784 them ourselves in finish_vtable_vardecl. */
1785 for (i = 0; i < len; ++i)
1786 if (vtable_decl_p (vec[i], /*data=*/0) && !DECL_EXTERNAL (vec[i]))
1788 DECL_NOT_REALLY_EXTERN (vec[i]) = 1;
1789 DECL_EXTERNAL (vec[i]) = 1;
1792 /* Write out any globals that need to be output. */
1793 result = wrapup_global_declarations (vec, len);
1795 /* Undo the hack to DECL_EXTERNAL above. */
1796 for (i = 0; i < len; ++i)
1797 if (vtable_decl_p (vec[i], /*data=*/0)
1798 && DECL_NOT_REALLY_EXTERN (vec[i]))
1800 DECL_NOT_REALLY_EXTERN (vec[i]) = 0;
1801 DECL_EXTERNAL (vec[i]) = 0;
1808 /* Mark ARG (which is really a struct binding_level **) for GC. */
1811 mark_binding_level (arg)
1814 struct binding_level *lvl = *(struct binding_level **)arg;
1818 ggc_mark_tree (lvl->names);
1819 ggc_mark_tree (lvl->tags);
1820 ggc_mark_tree (lvl->usings);
1821 ggc_mark_tree (lvl->using_directives);
1822 ggc_mark_tree (lvl->class_shadowed);
1823 ggc_mark_tree (lvl->type_shadowed);
1824 ggc_mark_tree (lvl->shadowed_labels);
1825 ggc_mark_tree (lvl->blocks);
1826 ggc_mark_tree (lvl->this_block);
1827 ggc_mark_tree (lvl->incomplete);
1828 ggc_mark_tree (lvl->dead_vars_from_for);
1830 lvl = lvl->level_chain;
1834 /* For debugging. */
1835 static int no_print_functions = 0;
1836 static int no_print_builtins = 0;
1839 print_binding_level (lvl)
1840 struct binding_level *lvl;
1844 fprintf (stderr, " blocks=");
1845 fprintf (stderr, HOST_PTR_PRINTF, lvl->blocks);
1846 fprintf (stderr, " n_incomplete=%d parm_flag=%d keep=%d",
1847 list_length (lvl->incomplete), lvl->parm_flag, lvl->keep);
1848 if (lvl->tag_transparent)
1849 fprintf (stderr, " tag-transparent");
1850 if (lvl->more_cleanups_ok)
1851 fprintf (stderr, " more-cleanups-ok");
1852 if (lvl->have_cleanups)
1853 fprintf (stderr, " have-cleanups");
1854 fprintf (stderr, "\n");
1857 fprintf (stderr, " names:\t");
1858 /* We can probably fit 3 names to a line? */
1859 for (t = lvl->names; t; t = TREE_CHAIN (t))
1861 if (no_print_functions && (TREE_CODE (t) == FUNCTION_DECL))
1863 if (no_print_builtins
1864 && (TREE_CODE (t) == TYPE_DECL)
1865 && (!strcmp (DECL_SOURCE_FILE (t),"<built-in>")))
1868 /* Function decls tend to have longer names. */
1869 if (TREE_CODE (t) == FUNCTION_DECL)
1876 fprintf (stderr, "\n\t");
1879 print_node_brief (stderr, "", t, 0);
1880 if (t == error_mark_node)
1884 fprintf (stderr, "\n");
1888 fprintf (stderr, " tags:\t");
1890 for (t = lvl->tags; t; t = TREE_CHAIN (t))
1892 if (TREE_PURPOSE (t) == NULL_TREE)
1894 else if (TREE_PURPOSE (t) == TYPE_IDENTIFIER (TREE_VALUE (t)))
1901 fprintf (stderr, "\n\t");
1904 if (TREE_PURPOSE (t) == NULL_TREE)
1906 print_node_brief (stderr, "<unnamed-typedef", TREE_VALUE (t), 0);
1907 fprintf (stderr, ">");
1909 else if (TREE_PURPOSE (t) == TYPE_IDENTIFIER (TREE_VALUE (t)))
1910 print_node_brief (stderr, "", TREE_VALUE (t), 0);
1913 print_node_brief (stderr, "<typedef", TREE_PURPOSE (t), 0);
1914 print_node_brief (stderr, "", TREE_VALUE (t), 0);
1915 fprintf (stderr, ">");
1919 fprintf (stderr, "\n");
1921 if (lvl->class_shadowed)
1923 fprintf (stderr, " class-shadowed:");
1924 for (t = lvl->class_shadowed; t; t = TREE_CHAIN (t))
1926 fprintf (stderr, " %s ", IDENTIFIER_POINTER (TREE_PURPOSE (t)));
1928 fprintf (stderr, "\n");
1930 if (lvl->type_shadowed)
1932 fprintf (stderr, " type-shadowed:");
1933 for (t = lvl->type_shadowed; t; t = TREE_CHAIN (t))
1935 fprintf (stderr, " %s ", IDENTIFIER_POINTER (TREE_PURPOSE (t)));
1937 fprintf (stderr, "\n");
1942 print_other_binding_stack (stack)
1943 struct binding_level *stack;
1945 struct binding_level *level;
1946 for (level = stack; level != global_binding_level; level = level->level_chain)
1948 fprintf (stderr, "binding level ");
1949 fprintf (stderr, HOST_PTR_PRINTF, level);
1950 fprintf (stderr, "\n");
1951 print_binding_level (level);
1956 print_binding_stack ()
1958 struct binding_level *b;
1959 fprintf (stderr, "current_binding_level=");
1960 fprintf (stderr, HOST_PTR_PRINTF, current_binding_level);
1961 fprintf (stderr, "\nclass_binding_level=");
1962 fprintf (stderr, HOST_PTR_PRINTF, class_binding_level);
1963 fprintf (stderr, "\nglobal_binding_level=");
1964 fprintf (stderr, HOST_PTR_PRINTF, global_binding_level);
1965 fprintf (stderr, "\n");
1966 if (class_binding_level)
1968 for (b = class_binding_level; b; b = b->level_chain)
1969 if (b == current_binding_level)
1972 b = class_binding_level;
1974 b = current_binding_level;
1977 b = current_binding_level;
1978 print_other_binding_stack (b);
1979 fprintf (stderr, "global:\n");
1980 print_binding_level (global_binding_level);
1983 /* Namespace binding access routines: The namespace_bindings field of
1984 the identifier is polymorphic, with three possible values:
1985 NULL_TREE, a list of CPLUS_BINDINGS, or any other tree_node
1986 indicating the BINDING_VALUE of global_namespace. */
1988 /* Check whether the a binding for the name to scope is known.
1989 Assumes that the bindings of the name are already a list
1990 of bindings. Returns the binding found, or NULL_TREE. */
1993 find_binding (name, scope)
1997 tree iter, prev = NULL_TREE;
1999 scope = ORIGINAL_NAMESPACE (scope);
2001 for (iter = IDENTIFIER_NAMESPACE_BINDINGS (name); iter;
2002 iter = TREE_CHAIN (iter))
2004 my_friendly_assert (TREE_CODE (iter) == CPLUS_BINDING, 374);
2005 if (BINDING_SCOPE (iter) == scope)
2007 /* Move binding found to the front of the list, so
2008 subsequent lookups will find it faster. */
2011 TREE_CHAIN (prev) = TREE_CHAIN (iter);
2012 TREE_CHAIN (iter) = IDENTIFIER_NAMESPACE_BINDINGS (name);
2013 IDENTIFIER_NAMESPACE_BINDINGS (name) = iter;
2022 /* Always returns a binding for name in scope. If the
2023 namespace_bindings is not a list, convert it to one first.
2024 If no binding is found, make a new one. */
2027 binding_for_name (name, scope)
2031 tree b = IDENTIFIER_NAMESPACE_BINDINGS (name);
2034 scope = ORIGINAL_NAMESPACE (scope);
2036 if (b && TREE_CODE (b) != CPLUS_BINDING)
2038 /* Get rid of optimization for global scope. */
2039 IDENTIFIER_NAMESPACE_BINDINGS (name) = NULL_TREE;
2040 BINDING_VALUE (binding_for_name (name, global_namespace)) = b;
2041 b = IDENTIFIER_NAMESPACE_BINDINGS (name);
2043 if (b && (result = find_binding (name, scope)))
2045 /* Not found, make a new one. */
2046 result = make_node (CPLUS_BINDING);
2047 TREE_CHAIN (result) = b;
2048 IDENTIFIER_NAMESPACE_BINDINGS (name) = result;
2049 BINDING_SCOPE (result) = scope;
2050 BINDING_TYPE (result) = NULL_TREE;
2051 BINDING_VALUE (result) = NULL_TREE;
2055 /* Return the binding value for name in scope, considering that
2056 namespace_binding may or may not be a list of CPLUS_BINDINGS. */
2059 namespace_binding (name, scope)
2063 tree b = IDENTIFIER_NAMESPACE_BINDINGS (name);
2066 if (scope == NULL_TREE)
2067 scope = global_namespace;
2068 if (TREE_CODE (b) != CPLUS_BINDING)
2069 return (scope == global_namespace) ? b : NULL_TREE;
2070 name = find_binding (name,scope);
2071 if (name == NULL_TREE)
2073 return BINDING_VALUE (name);
2076 /* Set the binding value for name in scope. If modifying the binding
2077 of global_namespace is attempted, try to optimize it. */
2080 set_namespace_binding (name, scope, val)
2087 if (scope == NULL_TREE)
2088 scope = global_namespace;
2090 if (scope == global_namespace)
2092 b = IDENTIFIER_NAMESPACE_BINDINGS (name);
2093 if (b == NULL_TREE || TREE_CODE (b) != CPLUS_BINDING)
2095 IDENTIFIER_NAMESPACE_BINDINGS (name) = val;
2099 b = binding_for_name (name, scope);
2100 BINDING_VALUE (b) = val;
2103 /* Push into the scope of the NAME namespace. If NAME is NULL_TREE, then we
2104 select a name that is unique to this compilation unit. */
2107 push_namespace (name)
2112 int implicit_use = 0;
2114 if (!global_namespace)
2116 /* This must be ::. */
2117 my_friendly_assert (name == get_identifier ("::"), 377);
2122 /* The name of anonymous namespace is unique for the translation
2124 if (!anonymous_namespace_name)
2125 anonymous_namespace_name = get_file_function_name ('N');
2126 name = anonymous_namespace_name;
2127 d = IDENTIFIER_NAMESPACE_VALUE (name);
2129 /* Reopening anonymous namespace. */
2133 else if (current_namespace == global_namespace
2134 && name == DECL_NAME (std_node))
2141 /* Check whether this is an extended namespace definition. */
2142 d = IDENTIFIER_NAMESPACE_VALUE (name);
2143 if (d != NULL_TREE && TREE_CODE (d) == NAMESPACE_DECL)
2146 if (DECL_NAMESPACE_ALIAS (d))
2148 cp_error ("namespace alias `%D' not allowed here, assuming `%D'",
2149 d, DECL_NAMESPACE_ALIAS (d));
2150 d = DECL_NAMESPACE_ALIAS (d);
2157 /* Make a new namespace, binding the name to it. */
2158 d = build_lang_decl (NAMESPACE_DECL, name, void_type_node);
2159 /* The global namespace is not pushed, and the global binding
2160 level is set elsewhere. */
2165 declare_namespace_level ();
2166 NAMESPACE_LEVEL (d) = current_binding_level;
2170 resume_binding_level (NAMESPACE_LEVEL (d));
2173 do_using_directive (d);
2174 /* Enter the name space. */
2175 current_namespace = d;
2178 /* Pop from the scope of the current namespace. */
2183 if (current_namespace == global_namespace)
2185 my_friendly_assert (in_std>0, 980421);
2189 current_namespace = CP_DECL_CONTEXT (current_namespace);
2190 /* The binding level is not popped, as it might be re-opened later. */
2191 suspend_binding_level ();
2194 /* Push into the scope of the namespace NS, even if it is deeply
2195 nested within another namespace. */
2198 push_nested_namespace (ns)
2201 if (ns == global_namespace)
2202 push_to_top_level ();
2205 push_nested_namespace (CP_DECL_CONTEXT (ns));
2206 push_namespace (DECL_NAME (ns));
2210 /* Pop back from the scope of the namespace NS, which was previously
2211 entered with push_nested_namespace. */
2214 pop_nested_namespace (ns)
2217 while (ns != global_namespace)
2220 ns = CP_DECL_CONTEXT (ns);
2223 pop_from_top_level ();
2227 /* Subroutines for reverting temporarily to top-level for instantiation
2228 of templates and such. We actually need to clear out the class- and
2229 local-value slots of all identifiers, so that only the global values
2230 are at all visible. Simply setting current_binding_level to the global
2231 scope isn't enough, because more binding levels may be pushed. */
2232 struct saved_scope *scope_chain;
2234 /* Mark ST for GC. */
2238 struct stmt_tree *st;
2240 ggc_mark_tree (st->x_last_stmt);
2241 ggc_mark_tree (st->x_last_expr_type);
2244 /* Mark ARG (which is really a struct saved_scope **) for GC. */
2247 mark_saved_scope (arg)
2250 struct saved_scope *t = *(struct saved_scope **)arg;
2253 mark_binding_level (&t->class_bindings);
2254 ggc_mark_tree (t->old_bindings);
2255 ggc_mark_tree (t->old_namespace);
2256 ggc_mark_tree (t->class_name);
2257 ggc_mark_tree (t->class_type);
2258 ggc_mark_tree (t->access_specifier);
2259 ggc_mark_tree (t->function_decl);
2261 ggc_mark_tree_varray (t->lang_base);
2262 ggc_mark_tree (t->lang_name);
2263 ggc_mark_tree (t->x_function_parms);
2264 ggc_mark_tree (t->template_parms);
2265 ggc_mark_tree (t->x_previous_class_type);
2266 ggc_mark_tree (t->x_previous_class_values);
2267 ggc_mark_tree (t->x_saved_tree);
2269 mark_stmt_tree (&t->x_stmt_tree);
2270 mark_binding_level (&t->bindings);
2276 store_bindings (names, old_bindings)
2277 tree names, old_bindings;
2280 for (t = names; t; t = TREE_CHAIN (t))
2282 tree binding, t1, id;
2284 if (TREE_CODE (t) == TREE_LIST)
2285 id = TREE_PURPOSE (t);
2290 /* Note that we may have an IDENTIFIER_CLASS_VALUE even when
2291 we have no IDENTIFIER_BINDING if we have left the class
2292 scope, but cached the class-level declarations. */
2293 || !(IDENTIFIER_BINDING (id) || IDENTIFIER_CLASS_VALUE (id)))
2296 for (t1 = old_bindings; t1; t1 = TREE_CHAIN (t1))
2297 if (TREE_VEC_ELT (t1, 0) == id)
2300 binding = make_tree_vec (4);
2304 my_friendly_assert (TREE_CODE (id) == IDENTIFIER_NODE, 135);
2305 TREE_VEC_ELT (binding, 0) = id;
2306 TREE_VEC_ELT (binding, 1) = REAL_IDENTIFIER_TYPE_VALUE (id);
2307 TREE_VEC_ELT (binding, 2) = IDENTIFIER_BINDING (id);
2308 TREE_VEC_ELT (binding, 3) = IDENTIFIER_CLASS_VALUE (id);
2309 IDENTIFIER_BINDING (id) = NULL_TREE;
2310 IDENTIFIER_CLASS_VALUE (id) = NULL_TREE;
2312 TREE_CHAIN (binding) = old_bindings;
2313 old_bindings = binding;
2317 return old_bindings;
2321 maybe_push_to_top_level (pseudo)
2324 struct saved_scope *s;
2325 struct binding_level *b;
2329 s = (struct saved_scope *) xcalloc (1, sizeof (struct saved_scope));
2331 b = scope_chain ? current_binding_level : 0;
2333 /* If we're in the middle of some function, save our state. */
2334 if (current_function)
2337 push_function_context_to (NULL_TREE);
2342 old_bindings = NULL_TREE;
2343 if (scope_chain && previous_class_type)
2344 old_bindings = store_bindings (previous_class_values, old_bindings);
2346 /* Have to include global_binding_level, because class-level decls
2347 aren't listed anywhere useful. */
2348 for (; b; b = b->level_chain)
2352 /* Template IDs are inserted into the global level. If they were
2353 inserted into namespace level, finish_file wouldn't find them
2354 when doing pending instantiations. Therefore, don't stop at
2355 namespace level, but continue until :: . */
2356 if (b == global_binding_level || (pseudo && b->pseudo_global))
2359 old_bindings = store_bindings (b->names, old_bindings);
2360 /* We also need to check class_shadowed to save class-level type
2361 bindings, since pushclass doesn't fill in b->names. */
2362 if (b->parm_flag == 2)
2363 old_bindings = store_bindings (b->class_shadowed, old_bindings);
2365 /* Unwind type-value slots back to top level. */
2366 for (t = b->type_shadowed; t; t = TREE_CHAIN (t))
2367 SET_IDENTIFIER_TYPE_VALUE (TREE_PURPOSE (t), TREE_VALUE (t));
2369 s->prev = scope_chain;
2370 s->old_bindings = old_bindings;
2372 s->need_pop_function_context = need_pop;
2373 s->function_decl = current_function_decl;
2376 current_function_decl = NULL_TREE;
2377 VARRAY_TREE_INIT (current_lang_base, 10, "current_lang_base");
2378 current_lang_stack = &VARRAY_TREE (current_lang_base, 0);
2379 current_lang_name = lang_name_cplusplus;
2380 strict_prototype = strict_prototypes_lang_cplusplus;
2381 current_namespace = global_namespace;
2385 push_to_top_level ()
2387 maybe_push_to_top_level (0);
2391 pop_from_top_level ()
2393 struct saved_scope *s = scope_chain;
2396 /* Clear out class-level bindings cache. */
2397 if (previous_class_type)
2398 invalidate_class_lookup_cache ();
2400 VARRAY_FREE (current_lang_base);
2402 scope_chain = s->prev;
2403 for (t = s->old_bindings; t; t = TREE_CHAIN (t))
2405 tree id = TREE_VEC_ELT (t, 0);
2408 SET_IDENTIFIER_TYPE_VALUE (id, TREE_VEC_ELT (t, 1));
2409 IDENTIFIER_BINDING (id) = TREE_VEC_ELT (t, 2);
2410 IDENTIFIER_CLASS_VALUE (id) = TREE_VEC_ELT (t, 3);
2414 if (current_lang_name == lang_name_cplusplus)
2415 strict_prototype = strict_prototypes_lang_cplusplus;
2416 else if (current_lang_name == lang_name_c)
2417 strict_prototype = strict_prototypes_lang_c;
2419 /* If we were in the middle of compiling a function, restore our
2421 if (s->need_pop_function_context)
2422 pop_function_context_from (NULL_TREE);
2423 current_function_decl = s->function_decl;
2428 /* Push a definition of struct, union or enum tag "name".
2429 into binding_level "b". "type" should be the type node,
2430 We assume that the tag "name" is not already defined.
2432 Note that the definition may really be just a forward reference.
2433 In that case, the TYPE_SIZE will be a NULL_TREE.
2435 C++ gratuitously puts all these tags in the name space. */
2437 /* When setting the IDENTIFIER_TYPE_VALUE field of an identifier ID,
2438 record the shadowed value for this binding contour. TYPE is
2439 the type that ID maps to. */
2442 set_identifier_type_value_with_scope (id, type, b)
2445 struct binding_level *b;
2447 if (!b->namespace_p)
2449 /* Shadow the marker, not the real thing, so that the marker
2450 gets restored later. */
2451 tree old_type_value = REAL_IDENTIFIER_TYPE_VALUE (id);
2453 = tree_cons (id, old_type_value, b->type_shadowed);
2457 tree binding = binding_for_name (id, current_namespace);
2458 BINDING_TYPE (binding) = type;
2459 /* Store marker instead of real type. */
2460 type = global_type_node;
2462 SET_IDENTIFIER_TYPE_VALUE (id, type);
2465 /* As set_identifier_type_value_with_scope, but using current_binding_level. */
2468 set_identifier_type_value (id, type)
2472 set_identifier_type_value_with_scope (id, type, current_binding_level);
2475 /* Return the type associated with id. */
2478 identifier_type_value (id)
2481 /* There is no type with that name, anywhere. */
2482 if (REAL_IDENTIFIER_TYPE_VALUE (id) == NULL_TREE)
2484 /* This is not the type marker, but the real thing. */
2485 if (REAL_IDENTIFIER_TYPE_VALUE (id) != global_type_node)
2486 return REAL_IDENTIFIER_TYPE_VALUE (id);
2487 /* Have to search for it. It must be on the global level, now.
2488 Ask lookup_name not to return non-types. */
2489 id = lookup_name_real (id, 2, 1, 0);
2491 return TREE_TYPE (id);
2495 /* Pop off extraneous binding levels left over due to syntax errors.
2497 We don't pop past namespaces, as they might be valid. */
2502 #ifdef DEBUG_CP_BINDING_LEVELS
2503 fprintf (stderr, "XXX entering pop_everything ()\n");
2505 while (!toplevel_bindings_p ())
2507 if (current_binding_level->parm_flag == 2)
2508 pop_nested_class ();
2512 #ifdef DEBUG_CP_BINDING_LEVELS
2513 fprintf (stderr, "XXX leaving pop_everything ()\n");
2517 /* The type TYPE is being declared. If it is a class template, or a
2518 specialization of a class template, do any processing required and
2519 perform error-checking. If IS_FRIEND is non-zero, this TYPE is
2520 being declared a friend. B is the binding level at which this TYPE
2523 Returns the TYPE_DECL for TYPE, which may have been altered by this
2527 maybe_process_template_type_declaration (type, globalize, b)
2530 struct binding_level* b;
2532 tree decl = TYPE_NAME (type);
2534 if (processing_template_parmlist)
2535 /* You can't declare a new template type in a template parameter
2536 list. But, you can declare a non-template type:
2538 template <class A*> struct S;
2540 is a forward-declaration of `A'. */
2544 maybe_check_template_type (type);
2546 my_friendly_assert (IS_AGGR_TYPE (type)
2547 || TREE_CODE (type) == ENUMERAL_TYPE, 0);
2550 if (processing_template_decl)
2552 /* This may change after the call to
2553 push_template_decl_real, but we want the original value. */
2554 tree name = DECL_NAME (decl);
2556 decl = push_template_decl_real (decl, globalize);
2557 /* If the current binding level is the binding level for the
2558 template parameters (see the comment in
2559 begin_template_parm_list) and the enclosing level is a class
2560 scope, and we're not looking at a friend, push the
2561 declaration of the member class into the class scope. In the
2562 friend case, push_template_decl will already have put the
2563 friend into global scope, if appropriate. */
2564 if (TREE_CODE (type) != ENUMERAL_TYPE
2565 && !globalize && b->pseudo_global
2566 && b->level_chain->parm_flag == 2)
2568 finish_member_declaration (CLASSTYPE_TI_TEMPLATE (type));
2569 /* Put this tag on the list of tags for the class, since
2570 that won't happen below because B is not the class
2571 binding level, but is instead the pseudo-global level. */
2572 b->level_chain->tags =
2573 tree_cons (name, type, b->level_chain->tags);
2574 if (TYPE_SIZE (current_class_type) == NULL_TREE)
2575 CLASSTYPE_TAGS (current_class_type) = b->level_chain->tags;
2583 /* In C++, you don't have to write `struct S' to refer to `S'; you
2584 can just use `S'. We accomplish this by creating a TYPE_DECL as
2585 if the user had written `typedef struct S S'. Create and return
2586 the TYPE_DECL for TYPE. */
2589 create_implicit_typedef (name, type)
2595 decl = build_decl (TYPE_DECL, name, type);
2596 SET_DECL_ARTIFICIAL (decl);
2597 /* There are other implicit type declarations, like the one *within*
2598 a class that allows you to write `S::S'. We must distinguish
2600 SET_DECL_IMPLICIT_TYPEDEF_P (decl);
2601 TYPE_NAME (type) = decl;
2606 /* Push a tag name NAME for struct/class/union/enum type TYPE.
2607 Normally put it into the inner-most non-tag-transparent scope,
2608 but if GLOBALIZE is true, put it in the inner-most non-class scope.
2609 The latter is needed for implicit declarations. */
2612 pushtag (name, type, globalize)
2616 register struct binding_level *b;
2618 b = current_binding_level;
2619 while (b->tag_transparent
2620 || (globalize && b->parm_flag == 2))
2623 b->tags = tree_cons (name, type, b->tags);
2627 /* Do C++ gratuitous typedefing. */
2628 if (IDENTIFIER_TYPE_VALUE (name) != type)
2630 register tree d = NULL_TREE;
2632 tree context = TYPE_CONTEXT (type);
2636 tree cs = current_scope ();
2640 else if (cs != NULL_TREE
2641 && TREE_CODE_CLASS (TREE_CODE (cs)) == 't')
2642 /* When declaring a friend class of a local class, we want
2643 to inject the newly named class into the scope
2644 containing the local class, not the namespace scope. */
2645 context = hack_decl_function_context (get_type_decl (cs));
2648 context = current_namespace;
2650 if ((b->pseudo_global && b->level_chain->parm_flag == 2)
2651 || b->parm_flag == 2)
2654 if (current_lang_name == lang_name_java)
2655 TYPE_FOR_JAVA (type) = 1;
2657 d = create_implicit_typedef (name, type);
2658 DECL_CONTEXT (d) = FROB_CONTEXT (context);
2660 set_identifier_type_value_with_scope (name, type, b);
2662 d = maybe_process_template_type_declaration (type,
2665 if (b->parm_flag == 2)
2667 if (!PROCESSING_REAL_TEMPLATE_DECL_P ())
2668 /* Put this TYPE_DECL on the TYPE_FIELDS list for the
2669 class. But if it's a member template class, we
2670 want the TEMPLATE_DECL, not the TYPE_DECL, so this
2672 finish_member_declaration (d);
2674 pushdecl_class_level (d);
2677 d = pushdecl_with_scope (d, b);
2679 if (ANON_AGGRNAME_P (name))
2680 DECL_IGNORED_P (d) = 1;
2682 TYPE_CONTEXT (type) = DECL_CONTEXT (d);
2683 DECL_ASSEMBLER_NAME (d) = DECL_NAME (d);
2684 if (!uses_template_parms (type))
2685 DECL_ASSEMBLER_NAME (d)
2686 = get_identifier (build_overload_name (type, 1, 1));
2688 if (b->parm_flag == 2)
2690 if (TYPE_SIZE (current_class_type) == NULL_TREE)
2691 CLASSTYPE_TAGS (current_class_type) = b->tags;
2695 if (TREE_CODE (TYPE_NAME (type)) == TYPE_DECL)
2696 /* Use the canonical TYPE_DECL for this node. */
2697 TYPE_STUB_DECL (type) = TYPE_NAME (type);
2700 /* Create a fake NULL-named TYPE_DECL node whose TREE_TYPE
2701 will be the tagged type we just added to the current
2702 binding level. This fake NULL-named TYPE_DECL node helps
2703 dwarfout.c to know when it needs to output a
2704 representation of a tagged type, and it also gives us a
2705 convenient place to record the "scope start" address for
2708 tree d = build_decl (TYPE_DECL, NULL_TREE, type);
2709 TYPE_STUB_DECL (type) = pushdecl_with_scope (d, b);
2713 /* Counter used to create anonymous type names. */
2715 static int anon_cnt = 0;
2717 /* Return an IDENTIFIER which can be used as a name for
2718 anonymous structs and unions. */
2725 sprintf (buf, ANON_AGGRNAME_FORMAT, anon_cnt++);
2726 return get_identifier (buf);
2729 /* Clear the TREE_PURPOSE slot of tags which have anonymous typenames.
2730 This keeps dbxout from getting confused. */
2735 register struct binding_level *b;
2737 static int last_cnt = 0;
2739 /* Fast out if no new anon names were declared. */
2740 if (last_cnt == anon_cnt)
2743 b = current_binding_level;
2744 while (b->tag_transparent)
2749 /* A NULL purpose means we have already processed all tags
2750 from here to the end of the list. */
2751 if (TREE_PURPOSE (tags) == NULL_TREE)
2753 if (ANON_AGGRNAME_P (TREE_PURPOSE (tags)))
2754 TREE_PURPOSE (tags) = NULL_TREE;
2755 tags = TREE_CHAIN (tags);
2757 last_cnt = anon_cnt;
2760 /* Subroutine of duplicate_decls: return truthvalue of whether
2761 or not types of these decls match.
2763 For C++, we must compare the parameter list so that `int' can match
2764 `int&' in a parameter position, but `int&' is not confused with
2768 decls_match (newdecl, olddecl)
2769 tree newdecl, olddecl;
2773 if (newdecl == olddecl)
2776 if (TREE_CODE (newdecl) != TREE_CODE (olddecl))
2777 /* If the two DECLs are not even the same kind of thing, we're not
2778 interested in their types. */
2781 if (TREE_CODE (newdecl) == FUNCTION_DECL)
2783 tree f1 = TREE_TYPE (newdecl);
2784 tree f2 = TREE_TYPE (olddecl);
2785 tree p1 = TYPE_ARG_TYPES (f1);
2786 tree p2 = TYPE_ARG_TYPES (f2);
2788 if (DECL_REAL_CONTEXT (newdecl) != DECL_REAL_CONTEXT (olddecl)
2789 && ! (DECL_LANGUAGE (newdecl) == lang_c
2790 && DECL_LANGUAGE (olddecl) == lang_c))
2793 /* When we parse a static member function definition,
2794 we put together a FUNCTION_DECL which thinks its type
2795 is METHOD_TYPE. Change that to FUNCTION_TYPE, and
2797 if (TREE_CODE (f1) == METHOD_TYPE && DECL_STATIC_FUNCTION_P (olddecl))
2798 revert_static_member_fn (&newdecl, &f1, &p1);
2799 else if (TREE_CODE (f2) == METHOD_TYPE
2800 && DECL_STATIC_FUNCTION_P (newdecl))
2801 revert_static_member_fn (&olddecl, &f2, &p2);
2803 /* Here we must take care of the case where new default
2804 parameters are specified. Also, warn if an old
2805 declaration becomes ambiguous because default
2806 parameters may cause the two to be ambiguous. */
2807 if (TREE_CODE (f1) != TREE_CODE (f2))
2809 if (TREE_CODE (f1) == OFFSET_TYPE)
2810 cp_compiler_error ("`%D' redeclared as member function", newdecl);
2812 cp_compiler_error ("`%D' redeclared as non-member function", newdecl);
2816 if (same_type_p (TREE_TYPE (f1), TREE_TYPE (f2)))
2818 if (! strict_prototypes_lang_c && DECL_LANGUAGE (olddecl) == lang_c
2821 types_match = self_promoting_args_p (p1);
2822 if (p1 == void_list_node)
2823 TREE_TYPE (newdecl) = TREE_TYPE (olddecl);
2825 else if (!strict_prototypes_lang_c && DECL_LANGUAGE (olddecl)==lang_c
2826 && DECL_LANGUAGE (newdecl) == lang_c && p1 == NULL_TREE)
2828 types_match = self_promoting_args_p (p2);
2829 TREE_TYPE (newdecl) = TREE_TYPE (olddecl);
2832 types_match = compparms (p1, p2);
2837 else if (TREE_CODE (newdecl) == TEMPLATE_DECL)
2839 if (!comp_template_parms (DECL_TEMPLATE_PARMS (newdecl),
2840 DECL_TEMPLATE_PARMS (olddecl)))
2843 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == TYPE_DECL)
2846 types_match = decls_match (DECL_TEMPLATE_RESULT (olddecl),
2847 DECL_TEMPLATE_RESULT (newdecl));
2851 if (TREE_TYPE (newdecl) == error_mark_node)
2852 types_match = TREE_TYPE (olddecl) == error_mark_node;
2853 else if (TREE_TYPE (olddecl) == NULL_TREE)
2854 types_match = TREE_TYPE (newdecl) == NULL_TREE;
2855 else if (TREE_TYPE (newdecl) == NULL_TREE)
2858 types_match = comptypes (TREE_TYPE (newdecl),
2859 TREE_TYPE (olddecl),
2860 COMPARE_REDECLARATION);
2866 /* If NEWDECL is `static' and an `extern' was seen previously,
2867 warn about it. OLDDECL is the previous declaration.
2869 Note that this does not apply to the C++ case of declaring
2870 a variable `extern const' and then later `const'.
2872 Don't complain about built-in functions, since they are beyond
2873 the user's control. */
2876 warn_extern_redeclared_static (newdecl, olddecl)
2877 tree newdecl, olddecl;
2879 static const char *explicit_extern_static_warning
2880 = "`%D' was declared `extern' and later `static'";
2881 static const char *implicit_extern_static_warning
2882 = "`%D' was declared implicitly `extern' and later `static'";
2886 if (TREE_CODE (newdecl) == TYPE_DECL
2887 || TREE_CODE (newdecl) == TEMPLATE_DECL)
2890 /* Don't get confused by static member functions; that's a different
2892 if (TREE_CODE (newdecl) == FUNCTION_DECL
2893 && DECL_STATIC_FUNCTION_P (newdecl))
2896 /* If the old declaration was `static', or the new one isn't, then
2897 then everything is OK. */
2898 if (DECL_THIS_STATIC (olddecl) || !DECL_THIS_STATIC (newdecl))
2901 /* It's OK to declare a builtin function as `static'. */
2902 if (TREE_CODE (olddecl) == FUNCTION_DECL
2903 && DECL_ARTIFICIAL (olddecl))
2906 name = DECL_ASSEMBLER_NAME (newdecl);
2907 cp_pedwarn (IDENTIFIER_IMPLICIT_DECL (name)
2908 ? implicit_extern_static_warning
2909 : explicit_extern_static_warning, newdecl);
2910 cp_pedwarn_at ("previous declaration of `%D'", olddecl);
2913 /* Handle when a new declaration NEWDECL has the same name as an old
2914 one OLDDECL in the same binding contour. Prints an error message
2917 If safely possible, alter OLDDECL to look like NEWDECL, and return 1.
2918 Otherwise, return 0. */
2921 duplicate_decls (newdecl, olddecl)
2922 tree newdecl, olddecl;
2924 unsigned olddecl_uid = DECL_UID (olddecl);
2925 int olddecl_friend = 0, types_match = 0;
2926 int new_defines_function = 0;
2928 if (newdecl == olddecl)
2931 types_match = decls_match (newdecl, olddecl);
2933 /* If either the type of the new decl or the type of the old decl is an
2934 error_mark_node, then that implies that we have already issued an
2935 error (earlier) for some bogus type specification, and in that case,
2936 it is rather pointless to harass the user with yet more error message
2937 about the same declaration, so just pretend the types match here. */
2938 if (TREE_TYPE (newdecl) == error_mark_node
2939 || TREE_TYPE (olddecl) == error_mark_node)
2942 /* Check for redeclaration and other discrepancies. */
2943 if (TREE_CODE (olddecl) == FUNCTION_DECL
2944 && DECL_ARTIFICIAL (olddecl))
2946 if (TREE_CODE (newdecl) != FUNCTION_DECL)
2948 /* If you declare a built-in or predefined function name as static,
2949 the old definition is overridden, but optionally warn this was a
2950 bad choice of name. */
2951 if (! TREE_PUBLIC (newdecl))
2954 cp_warning ("shadowing %s function `%#D'",
2955 DECL_BUILT_IN (olddecl) ? "built-in" : "library",
2957 /* Discard the old built-in function. */
2960 /* If the built-in is not ansi, then programs can override
2961 it even globally without an error. */
2962 else if (! DECL_BUILT_IN (olddecl))
2963 cp_warning ("library function `%#D' redeclared as non-function `%#D'",
2967 cp_error ("declaration of `%#D'", newdecl);
2968 cp_error ("conflicts with built-in declaration `%#D'",
2973 else if (!types_match)
2975 if ((DECL_LANGUAGE (newdecl) == lang_c
2976 && DECL_LANGUAGE (olddecl) == lang_c)
2977 || compparms (TYPE_ARG_TYPES (TREE_TYPE (newdecl)),
2978 TYPE_ARG_TYPES (TREE_TYPE (olddecl))))
2980 /* A near match; override the builtin. */
2982 if (TREE_PUBLIC (newdecl))
2984 cp_warning ("new declaration `%#D'", newdecl);
2985 cp_warning ("ambiguates built-in declaration `%#D'",
2988 else if (warn_shadow)
2989 cp_warning ("shadowing %s function `%#D'",
2990 DECL_BUILT_IN (olddecl) ? "built-in" : "library",
2994 /* Discard the old built-in function. */
2998 if (DECL_THIS_STATIC (newdecl) && !DECL_THIS_STATIC (olddecl))
3000 /* If a builtin function is redeclared as `static', merge
3001 the declarations, but make the original one static. */
3002 DECL_THIS_STATIC (olddecl) = 1;
3003 TREE_PUBLIC (olddecl) = 0;
3005 /* Make the olddeclaration consistent with the new one so that
3006 all remnants of the builtin-ness of this function will be
3008 DECL_LANGUAGE (olddecl) = DECL_LANGUAGE (newdecl);
3009 DECL_RTL (olddecl) = DECL_RTL (newdecl);
3010 DECL_ASSEMBLER_NAME (olddecl) = DECL_ASSEMBLER_NAME (newdecl);
3011 SET_IDENTIFIER_GLOBAL_VALUE (DECL_ASSEMBLER_NAME (newdecl),
3015 else if (TREE_CODE (olddecl) != TREE_CODE (newdecl))
3017 if ((TREE_CODE (olddecl) == TYPE_DECL && DECL_ARTIFICIAL (olddecl)
3018 && TREE_CODE (newdecl) != TYPE_DECL
3019 && ! (TREE_CODE (newdecl) == TEMPLATE_DECL
3020 && TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == TYPE_DECL))
3021 || (TREE_CODE (newdecl) == TYPE_DECL && DECL_ARTIFICIAL (newdecl)
3022 && TREE_CODE (olddecl) != TYPE_DECL
3023 && ! (TREE_CODE (olddecl) == TEMPLATE_DECL
3024 && (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl))
3027 /* We do nothing special here, because C++ does such nasty
3028 things with TYPE_DECLs. Instead, just let the TYPE_DECL
3029 get shadowed, and know that if we need to find a TYPE_DECL
3030 for a given name, we can look in the IDENTIFIER_TYPE_VALUE
3031 slot of the identifier. */
3035 if ((TREE_CODE (newdecl) == FUNCTION_DECL
3036 && DECL_FUNCTION_TEMPLATE_P (olddecl))
3037 || (TREE_CODE (olddecl) == FUNCTION_DECL
3038 && DECL_FUNCTION_TEMPLATE_P (newdecl)))
3041 cp_error ("`%#D' redeclared as different kind of symbol", newdecl);
3042 if (TREE_CODE (olddecl) == TREE_LIST)
3043 olddecl = TREE_VALUE (olddecl);
3044 cp_error_at ("previous declaration of `%#D'", olddecl);
3046 /* New decl is completely inconsistent with the old one =>
3047 tell caller to replace the old one. */
3051 else if (!types_match)
3053 if (DECL_REAL_CONTEXT (newdecl) != DECL_REAL_CONTEXT (olddecl))
3054 /* These are certainly not duplicate declarations; they're
3055 from different scopes. */
3058 if (TREE_CODE (newdecl) == TEMPLATE_DECL)
3060 /* The name of a class template may not be declared to refer to
3061 any other template, class, function, object, namespace, value,
3062 or type in the same scope. */
3063 if (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl)) == TYPE_DECL
3064 || TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == TYPE_DECL)
3066 cp_error ("declaration of template `%#D'", newdecl);
3067 cp_error_at ("conflicts with previous declaration `%#D'",
3070 else if (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl)) == FUNCTION_DECL
3071 && TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == FUNCTION_DECL
3072 && compparms (TYPE_ARG_TYPES (TREE_TYPE (DECL_TEMPLATE_RESULT (olddecl))),
3073 TYPE_ARG_TYPES (TREE_TYPE (DECL_TEMPLATE_RESULT (newdecl))))
3074 && comp_template_parms (DECL_TEMPLATE_PARMS (newdecl),
3075 DECL_TEMPLATE_PARMS (olddecl)))
3077 cp_error ("new declaration `%#D'", newdecl);
3078 cp_error_at ("ambiguates old declaration `%#D'", olddecl);
3082 if (TREE_CODE (newdecl) == FUNCTION_DECL)
3084 if (DECL_LANGUAGE (newdecl) == lang_c
3085 && DECL_LANGUAGE (olddecl) == lang_c)
3087 cp_error ("declaration of C function `%#D' conflicts with",
3089 cp_error_at ("previous declaration `%#D' here", olddecl);
3091 else if (compparms (TYPE_ARG_TYPES (TREE_TYPE (newdecl)),
3092 TYPE_ARG_TYPES (TREE_TYPE (olddecl))))
3094 cp_error ("new declaration `%#D'", newdecl);
3095 cp_error_at ("ambiguates old declaration `%#D'", olddecl);
3101 /* Already complained about this, so don't do so again. */
3102 else if (current_class_type == NULL_TREE
3103 || IDENTIFIER_ERROR_LOCUS (DECL_ASSEMBLER_NAME (newdecl)) != current_class_type)
3105 cp_error ("conflicting types for `%#D'", newdecl);
3106 cp_error_at ("previous declaration as `%#D'", olddecl);
3109 else if (TREE_CODE (newdecl) == FUNCTION_DECL
3110 && ((DECL_TEMPLATE_SPECIALIZATION (olddecl)
3111 && (!DECL_TEMPLATE_INFO (newdecl)
3112 || (DECL_TI_TEMPLATE (newdecl)
3113 != DECL_TI_TEMPLATE (olddecl))))
3114 || (DECL_TEMPLATE_SPECIALIZATION (newdecl)
3115 && (!DECL_TEMPLATE_INFO (olddecl)
3116 || (DECL_TI_TEMPLATE (olddecl)
3117 != DECL_TI_TEMPLATE (newdecl))))))
3118 /* It's OK to have a template specialization and a non-template
3119 with the same type, or to have specializations of two
3120 different templates with the same type. Note that if one is a
3121 specialization, and the other is an instantiation of the same
3122 template, that we do not exit at this point. That situation
3123 can occur if we instantiate a template class, and then
3124 specialize one of its methods. This situation is legal, but
3125 the declarations must be merged in the usual way. */
3127 else if (TREE_CODE (newdecl) == FUNCTION_DECL
3128 && ((DECL_TEMPLATE_INSTANTIATION (olddecl)
3129 && !DECL_USE_TEMPLATE (newdecl))
3130 || (DECL_TEMPLATE_INSTANTIATION (newdecl)
3131 && !DECL_USE_TEMPLATE (olddecl))))
3132 /* One of the declarations is a template instantiation, and the
3133 other is not a template at all. That's OK. */
3135 else if (TREE_CODE (newdecl) == NAMESPACE_DECL
3136 && DECL_NAMESPACE_ALIAS (newdecl)
3137 && DECL_NAMESPACE_ALIAS (newdecl) == DECL_NAMESPACE_ALIAS (olddecl))
3138 /* Redeclaration of namespace alias, ignore it. */
3142 const char *errmsg = redeclaration_error_message (newdecl, olddecl);
3145 cp_error (errmsg, newdecl);
3146 if (DECL_NAME (olddecl) != NULL_TREE)
3147 cp_error_at ((DECL_INITIAL (olddecl)
3148 && namespace_bindings_p ())
3149 ? "`%#D' previously defined here"
3150 : "`%#D' previously declared here", olddecl);
3152 else if (TREE_CODE (olddecl) == FUNCTION_DECL
3153 && DECL_INITIAL (olddecl) != NULL_TREE
3154 && TYPE_ARG_TYPES (TREE_TYPE (olddecl)) == NULL_TREE
3155 && TYPE_ARG_TYPES (TREE_TYPE (newdecl)) != NULL_TREE)
3157 /* Prototype decl follows defn w/o prototype. */
3158 cp_warning_at ("prototype for `%#D'", newdecl);
3159 cp_warning_at ("follows non-prototype definition here", olddecl);
3161 else if (TREE_CODE (olddecl) == FUNCTION_DECL
3162 && DECL_LANGUAGE (newdecl) != DECL_LANGUAGE (olddecl))
3164 /* extern "C" int foo ();
3165 int foo () { bar (); }
3167 if (current_lang_stack
3168 == &VARRAY_TREE (current_lang_base, 0))
3169 DECL_LANGUAGE (newdecl) = DECL_LANGUAGE (olddecl);
3172 cp_error_at ("previous declaration of `%#D' with %L linkage",
3173 olddecl, DECL_LANGUAGE (olddecl));
3174 cp_error ("conflicts with new declaration with %L linkage",
3175 DECL_LANGUAGE (newdecl));
3179 if (DECL_LANG_SPECIFIC (olddecl) && DECL_USE_TEMPLATE (olddecl))
3181 else if (TREE_CODE (olddecl) == FUNCTION_DECL)
3183 tree t1 = TYPE_ARG_TYPES (TREE_TYPE (olddecl));
3184 tree t2 = TYPE_ARG_TYPES (TREE_TYPE (newdecl));
3187 if (TREE_CODE (TREE_TYPE (newdecl)) == METHOD_TYPE)
3188 t1 = TREE_CHAIN (t1), t2 = TREE_CHAIN (t2);
3190 for (; t1 && t1 != void_list_node;
3191 t1 = TREE_CHAIN (t1), t2 = TREE_CHAIN (t2), i++)
3192 if (TREE_PURPOSE (t1) && TREE_PURPOSE (t2))
3194 if (1 == simple_cst_equal (TREE_PURPOSE (t1),
3199 cp_pedwarn ("default argument given for parameter %d of `%#D'",
3201 cp_pedwarn_at ("after previous specification in `%#D'",
3207 cp_error ("default argument given for parameter %d of `%#D'",
3209 cp_error_at ("after previous specification in `%#D'",
3214 if (DECL_THIS_INLINE (newdecl) && ! DECL_THIS_INLINE (olddecl)
3215 && TREE_ADDRESSABLE (olddecl) && warn_inline)
3217 cp_warning ("`%#D' was used before it was declared inline",
3219 cp_warning_at ("previous non-inline declaration here",
3225 /* If new decl is `static' and an `extern' was seen previously,
3227 warn_extern_redeclared_static (newdecl, olddecl);
3229 /* We have committed to returning 1 at this point. */
3230 if (TREE_CODE (newdecl) == FUNCTION_DECL)
3232 /* Now that functions must hold information normally held
3233 by field decls, there is extra work to do so that
3234 declaration information does not get destroyed during
3236 if (DECL_VINDEX (olddecl))
3237 DECL_VINDEX (newdecl) = DECL_VINDEX (olddecl);
3238 if (DECL_CONTEXT (olddecl))
3239 DECL_CONTEXT (newdecl) = DECL_CONTEXT (olddecl);
3240 if (DECL_CLASS_CONTEXT (olddecl))
3241 DECL_CLASS_CONTEXT (newdecl) = DECL_CLASS_CONTEXT (olddecl);
3242 if (DECL_PENDING_INLINE_INFO (newdecl) == (struct pending_inline *)0)
3243 DECL_PENDING_INLINE_INFO (newdecl) = DECL_PENDING_INLINE_INFO (olddecl);
3244 DECL_STATIC_CONSTRUCTOR (newdecl) |= DECL_STATIC_CONSTRUCTOR (olddecl);
3245 DECL_STATIC_DESTRUCTOR (newdecl) |= DECL_STATIC_DESTRUCTOR (olddecl);
3246 DECL_ABSTRACT_VIRTUAL_P (newdecl) |= DECL_ABSTRACT_VIRTUAL_P (olddecl);
3247 DECL_VIRTUAL_P (newdecl) |= DECL_VIRTUAL_P (olddecl);
3248 DECL_NEEDS_FINAL_OVERRIDER_P (newdecl) |= DECL_NEEDS_FINAL_OVERRIDER_P (olddecl);
3249 DECL_THIS_STATIC (newdecl) |= DECL_THIS_STATIC (olddecl);
3250 new_defines_function = DECL_INITIAL (newdecl) != NULL_TREE;
3252 /* Optionally warn about more than one declaration for the same
3253 name, but don't warn about a function declaration followed by a
3255 if (warn_redundant_decls && ! DECL_ARTIFICIAL (olddecl)
3256 && !(new_defines_function && DECL_INITIAL (olddecl) == NULL_TREE)
3257 /* Don't warn about extern decl followed by definition. */
3258 && !(DECL_EXTERNAL (olddecl) && ! DECL_EXTERNAL (newdecl))
3259 /* Don't warn about friends, let add_friend take care of it. */
3260 && ! DECL_FRIEND_P (newdecl))
3262 cp_warning ("redundant redeclaration of `%D' in same scope", newdecl);
3263 cp_warning_at ("previous declaration of `%D'", olddecl);
3267 /* Deal with C++: must preserve virtual function table size. */
3268 if (TREE_CODE (olddecl) == TYPE_DECL)
3270 register tree newtype = TREE_TYPE (newdecl);
3271 register tree oldtype = TREE_TYPE (olddecl);
3273 if (newtype != error_mark_node && oldtype != error_mark_node
3274 && TYPE_LANG_SPECIFIC (newtype) && TYPE_LANG_SPECIFIC (oldtype))
3276 CLASSTYPE_VSIZE (newtype) = CLASSTYPE_VSIZE (oldtype);
3277 CLASSTYPE_FRIEND_CLASSES (newtype)
3278 = CLASSTYPE_FRIEND_CLASSES (oldtype);
3282 /* Copy all the DECL_... slots specified in the new decl
3283 except for any that we copy here from the old type. */
3284 DECL_MACHINE_ATTRIBUTES (newdecl)
3285 = merge_machine_decl_attributes (olddecl, newdecl);
3287 if (TREE_CODE (newdecl) == TEMPLATE_DECL)
3289 if (! duplicate_decls (DECL_TEMPLATE_RESULT (newdecl),
3290 DECL_TEMPLATE_RESULT (olddecl)))
3291 cp_error ("invalid redeclaration of %D", newdecl);
3292 TREE_TYPE (olddecl) = TREE_TYPE (DECL_TEMPLATE_RESULT (olddecl));
3293 DECL_TEMPLATE_SPECIALIZATIONS (olddecl)
3294 = chainon (DECL_TEMPLATE_SPECIALIZATIONS (olddecl),
3295 DECL_TEMPLATE_SPECIALIZATIONS (newdecl));
3302 /* Automatically handles default parameters. */
3303 tree oldtype = TREE_TYPE (olddecl);
3306 /* Merge the data types specified in the two decls. */
3307 newtype = common_type (TREE_TYPE (newdecl), TREE_TYPE (olddecl));
3309 if (TREE_CODE (newdecl) == VAR_DECL)
3310 DECL_THIS_EXTERN (newdecl) |= DECL_THIS_EXTERN (olddecl);
3311 /* Do this after calling `common_type' so that default
3312 parameters don't confuse us. */
3313 else if (TREE_CODE (newdecl) == FUNCTION_DECL
3314 && (TYPE_RAISES_EXCEPTIONS (TREE_TYPE (newdecl))
3315 != TYPE_RAISES_EXCEPTIONS (TREE_TYPE (olddecl))))
3317 TREE_TYPE (newdecl) = build_exception_variant (newtype,
3318 TYPE_RAISES_EXCEPTIONS (TREE_TYPE (newdecl)));
3319 TREE_TYPE (olddecl) = build_exception_variant (newtype,
3320 TYPE_RAISES_EXCEPTIONS (oldtype));
3322 if ((pedantic || ! DECL_IN_SYSTEM_HEADER (olddecl))
3323 && DECL_SOURCE_LINE (olddecl) != 0
3325 && !comp_except_specs (TYPE_RAISES_EXCEPTIONS (TREE_TYPE (newdecl)),
3326 TYPE_RAISES_EXCEPTIONS (TREE_TYPE (olddecl)), 1))
3328 cp_error ("declaration of `%F' throws different exceptions",
3330 cp_error_at ("than previous declaration `%F'", olddecl);
3333 TREE_TYPE (newdecl) = TREE_TYPE (olddecl) = newtype;
3335 /* Lay the type out, unless already done. */
3336 if (! same_type_p (newtype, oldtype)
3337 && TREE_TYPE (newdecl) != error_mark_node
3338 && !(processing_template_decl && uses_template_parms (newdecl)))
3339 layout_type (TREE_TYPE (newdecl));
3341 if ((TREE_CODE (newdecl) == VAR_DECL
3342 || TREE_CODE (newdecl) == PARM_DECL
3343 || TREE_CODE (newdecl) == RESULT_DECL
3344 || TREE_CODE (newdecl) == FIELD_DECL
3345 || TREE_CODE (newdecl) == TYPE_DECL)
3346 && !(processing_template_decl && uses_template_parms (newdecl)))
3347 layout_decl (newdecl, 0);
3349 /* Merge the type qualifiers. */
3350 if (TREE_READONLY (newdecl))
3351 TREE_READONLY (olddecl) = 1;
3352 if (TREE_THIS_VOLATILE (newdecl))
3353 TREE_THIS_VOLATILE (olddecl) = 1;
3355 /* Merge the initialization information. */
3356 if (DECL_INITIAL (newdecl) == NULL_TREE
3357 && DECL_INITIAL (olddecl) != NULL_TREE)
3359 DECL_INITIAL (newdecl) = DECL_INITIAL (olddecl);
3360 DECL_SOURCE_FILE (newdecl) = DECL_SOURCE_FILE (olddecl);
3361 DECL_SOURCE_LINE (newdecl) = DECL_SOURCE_LINE (olddecl);
3362 if (CAN_HAVE_FULL_LANG_DECL_P (newdecl)
3363 && DECL_LANG_SPECIFIC (newdecl)
3364 && DECL_LANG_SPECIFIC (olddecl))
3365 DECL_SAVED_TREE (newdecl) = DECL_SAVED_TREE (olddecl);
3368 /* Merge the section attribute.
3369 We want to issue an error if the sections conflict but that must be
3370 done later in decl_attributes since we are called before attributes
3372 if (DECL_SECTION_NAME (newdecl) == NULL_TREE)
3373 DECL_SECTION_NAME (newdecl) = DECL_SECTION_NAME (olddecl);
3375 /* Keep the old rtl since we can safely use it. */
3376 DECL_RTL (newdecl) = DECL_RTL (olddecl);
3378 if (TREE_CODE (newdecl) == FUNCTION_DECL)
3380 DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (newdecl)
3381 |= DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (olddecl);
3382 DECL_NO_CHECK_MEMORY_USAGE (newdecl)
3383 |= DECL_NO_CHECK_MEMORY_USAGE (olddecl);
3384 DECL_NO_LIMIT_STACK (newdecl)
3385 |= DECL_NO_LIMIT_STACK (olddecl);
3388 /* If cannot merge, then use the new type and qualifiers,
3389 and don't preserve the old rtl. */
3392 /* Clean out any memory we had of the old declaration. */
3393 tree oldstatic = value_member (olddecl, static_aggregates);
3395 TREE_VALUE (oldstatic) = error_mark_node;
3397 TREE_TYPE (olddecl) = TREE_TYPE (newdecl);
3398 TREE_READONLY (olddecl) = TREE_READONLY (newdecl);
3399 TREE_THIS_VOLATILE (olddecl) = TREE_THIS_VOLATILE (newdecl);
3400 TREE_SIDE_EFFECTS (olddecl) = TREE_SIDE_EFFECTS (newdecl);
3403 /* Merge the storage class information. */
3404 DECL_WEAK (newdecl) |= DECL_WEAK (olddecl);
3405 DECL_ONE_ONLY (newdecl) |= DECL_ONE_ONLY (olddecl);
3406 DECL_DEFER_OUTPUT (newdecl) |= DECL_DEFER_OUTPUT (olddecl);
3407 TREE_PUBLIC (newdecl) = TREE_PUBLIC (olddecl);
3408 TREE_STATIC (olddecl) = TREE_STATIC (newdecl) |= TREE_STATIC (olddecl);
3409 if (! DECL_EXTERNAL (olddecl))
3410 DECL_EXTERNAL (newdecl) = 0;
3412 if (DECL_LANG_SPECIFIC (newdecl) && DECL_LANG_SPECIFIC (olddecl))
3414 DECL_INTERFACE_KNOWN (newdecl) |= DECL_INTERFACE_KNOWN (olddecl);
3415 DECL_NOT_REALLY_EXTERN (newdecl) |= DECL_NOT_REALLY_EXTERN (olddecl);
3416 DECL_COMDAT (newdecl) |= DECL_COMDAT (olddecl);
3417 DECL_TEMPLATE_INSTANTIATED (newdecl)
3418 |= DECL_TEMPLATE_INSTANTIATED (olddecl);
3419 /* Don't really know how much of the language-specific
3420 values we should copy from old to new. */
3421 DECL_IN_AGGR_P (newdecl) = DECL_IN_AGGR_P (olddecl);
3422 DECL_ACCESS (newdecl) = DECL_ACCESS (olddecl);
3423 DECL_NONCONVERTING_P (newdecl) = DECL_NONCONVERTING_P (olddecl);
3424 DECL_TEMPLATE_INFO (newdecl) = DECL_TEMPLATE_INFO (olddecl);
3425 olddecl_friend = DECL_FRIEND_P (olddecl);
3427 /* Only functions have DECL_BEFRIENDING_CLASSES. */
3428 if (TREE_CODE (newdecl) == FUNCTION_DECL
3429 || DECL_FUNCTION_TEMPLATE_P (newdecl))
3430 DECL_BEFRIENDING_CLASSES (newdecl)
3431 = chainon (DECL_BEFRIENDING_CLASSES (newdecl),
3432 DECL_BEFRIENDING_CLASSES (olddecl));
3435 if (TREE_CODE (newdecl) == FUNCTION_DECL)
3437 if (DECL_TEMPLATE_INSTANTIATION (olddecl)
3438 && !DECL_TEMPLATE_INSTANTIATION (newdecl))
3440 /* If newdecl is not a specialization, then it is not a
3441 template-related function at all. And that means that we
3442 shoud have exited above, returning 0. */
3443 my_friendly_assert (DECL_TEMPLATE_SPECIALIZATION (newdecl),
3446 if (TREE_USED (olddecl))
3447 /* From [temp.expl.spec]:
3449 If a template, a member template or the member of a class
3450 template is explicitly specialized then that
3451 specialization shall be declared before the first use of
3452 that specialization that would cause an implicit
3453 instantiation to take place, in every translation unit in
3454 which such a use occurs. */
3455 cp_error ("explicit specialization of %D after first use",
3458 SET_DECL_TEMPLATE_SPECIALIZATION (olddecl);
3460 DECL_THIS_INLINE (newdecl) |= DECL_THIS_INLINE (olddecl);
3462 /* If either decl says `inline', this fn is inline, unless its
3463 definition was passed already. */
3464 if (DECL_INLINE (newdecl) && DECL_INITIAL (olddecl) == NULL_TREE)
3465 DECL_INLINE (olddecl) = 1;
3466 DECL_INLINE (newdecl) = DECL_INLINE (olddecl);
3470 DECL_LANGUAGE (olddecl) = DECL_LANGUAGE (newdecl);
3471 DECL_ASSEMBLER_NAME (olddecl) = DECL_ASSEMBLER_NAME (newdecl);
3472 DECL_RTL (olddecl) = DECL_RTL (newdecl);
3474 if (! types_match || new_defines_function)
3476 /* These need to be copied so that the names are available.
3477 Note that if the types do match, we'll preserve inline
3478 info and other bits, but if not, we won't. */
3479 DECL_ARGUMENTS (olddecl) = DECL_ARGUMENTS (newdecl);
3480 DECL_RESULT (olddecl) = DECL_RESULT (newdecl);
3482 if (new_defines_function)
3483 /* If defining a function declared with other language
3484 linkage, use the previously declared language linkage. */
3485 DECL_LANGUAGE (newdecl) = DECL_LANGUAGE (olddecl);
3486 else if (types_match)
3488 /* If redeclaring a builtin function, and not a definition,
3489 it stays built in. */
3490 if (DECL_BUILT_IN (olddecl))
3492 DECL_BUILT_IN_CLASS (newdecl) = DECL_BUILT_IN_CLASS (olddecl);
3493 DECL_FUNCTION_CODE (newdecl) = DECL_FUNCTION_CODE (olddecl);
3494 /* If we're keeping the built-in definition, keep the rtl,
3495 regardless of declaration matches. */
3496 DECL_RTL (newdecl) = DECL_RTL (olddecl);
3499 DECL_FRAME_SIZE (newdecl) = DECL_FRAME_SIZE (olddecl);
3501 DECL_RESULT (newdecl) = DECL_RESULT (olddecl);
3502 if ((DECL_SAVED_INSNS (newdecl) = DECL_SAVED_INSNS (olddecl)))
3503 /* Previously saved insns go together with
3504 the function's previous definition. */
3505 DECL_INITIAL (newdecl) = DECL_INITIAL (olddecl);
3506 /* Don't clear out the arguments if we're redefining a function. */
3507 if (DECL_ARGUMENTS (olddecl))
3508 DECL_ARGUMENTS (newdecl) = DECL_ARGUMENTS (olddecl);
3510 if (DECL_LANG_SPECIFIC (olddecl))
3511 DECL_MAIN_VARIANT (newdecl) = DECL_MAIN_VARIANT (olddecl);
3514 if (TREE_CODE (newdecl) == NAMESPACE_DECL)
3516 NAMESPACE_LEVEL (newdecl) = NAMESPACE_LEVEL (olddecl);
3519 /* Now preserve various other info from the definition. */
3520 TREE_ADDRESSABLE (newdecl) = TREE_ADDRESSABLE (olddecl);
3521 TREE_ASM_WRITTEN (newdecl) = TREE_ASM_WRITTEN (olddecl);
3522 DECL_COMMON (newdecl) = DECL_COMMON (olddecl);
3523 DECL_ASSEMBLER_NAME (newdecl) = DECL_ASSEMBLER_NAME (olddecl);
3525 if (TREE_CODE (newdecl) == FUNCTION_DECL)
3529 function_size = sizeof (struct tree_decl);
3531 bcopy ((char *) newdecl + sizeof (struct tree_common),
3532 (char *) olddecl + sizeof (struct tree_common),
3533 function_size - sizeof (struct tree_common));
3535 if (DECL_TEMPLATE_INSTANTIATION (newdecl))
3537 /* If newdecl is a template instantiation, it is possible that
3538 the following sequence of events has occurred:
3540 o A friend function was declared in a class template. The
3541 class template was instantiated.
3543 o The instantiation of the friend declaration was
3544 recorded on the instantiation list, and is newdecl.
3546 o Later, however, instantiate_class_template called pushdecl
3547 on the newdecl to perform name injection. But, pushdecl in
3548 turn called duplicate_decls when it discovered that another
3549 declaration of a global function with the same name already
3552 o Here, in duplicate_decls, we decided to clobber newdecl.
3554 If we're going to do that, we'd better make sure that
3555 olddecl, and not newdecl, is on the list of
3556 instantiations so that if we try to do the instantiation
3557 again we won't get the clobbered declaration. */
3559 tree tmpl = DECL_TI_TEMPLATE (newdecl);
3560 tree decls = DECL_TEMPLATE_SPECIALIZATIONS (tmpl);
3562 for (; decls; decls = TREE_CHAIN (decls))
3563 if (TREE_VALUE (decls) == newdecl)
3564 TREE_VALUE (decls) = olddecl;
3569 bcopy ((char *) newdecl + sizeof (struct tree_common),
3570 (char *) olddecl + sizeof (struct tree_common),
3571 sizeof (struct tree_decl) - sizeof (struct tree_common)
3572 + tree_code_length [(int)TREE_CODE (newdecl)] * sizeof (char *));
3575 DECL_UID (olddecl) = olddecl_uid;
3577 DECL_FRIEND_P (olddecl) = 1;
3579 /* NEWDECL contains the merged attribute lists.
3580 Update OLDDECL to be the same. */
3581 DECL_MACHINE_ATTRIBUTES (olddecl) = DECL_MACHINE_ATTRIBUTES (newdecl);
3586 /* Record a decl-node X as belonging to the current lexical scope.
3587 Check for errors (such as an incompatible declaration for the same
3588 name already seen in the same scope).
3590 Returns either X or an old decl for the same name.
3591 If an old decl is returned, it may have been smashed
3592 to agree with what X says. */
3600 int need_new_binding;
3602 /* We shouldn't be calling pushdecl when we're generating RTL for a
3603 function that we already did semantic analysis on previously. */
3604 my_friendly_assert (!current_function || doing_semantic_analysis_p (),
3607 name = DECL_ASSEMBLER_NAME (x);
3608 need_new_binding = 1;
3610 if (DECL_TEMPLATE_PARM_P (x))
3611 /* Template parameters have no context; they are not X::T even
3612 when declared within a class or namespace. */
3616 if (current_function_decl && x != current_function_decl
3617 /* A local declaration for a function doesn't constitute
3619 && !(TREE_CODE (x) == FUNCTION_DECL && !DECL_INITIAL (x))
3620 /* A local declaration for an `extern' variable is in the
3621 scoped of the current namespace, not the current
3623 && !(TREE_CODE (x) == VAR_DECL && DECL_EXTERNAL (x))
3624 /* Don't change DECL_CONTEXT of virtual methods. */
3625 && (TREE_CODE (x) != FUNCTION_DECL || !DECL_VIRTUAL_P (x))
3626 && !DECL_CONTEXT (x))
3627 DECL_CONTEXT (x) = current_function_decl;
3628 if (!DECL_CONTEXT (x))
3629 DECL_CONTEXT (x) = FROB_CONTEXT (current_namespace);
3631 /* If this is the declaration for a namespace-scope function,
3632 but the declaration itself is in a local scope, mark the
3634 if (TREE_CODE (x) == FUNCTION_DECL
3635 && DECL_NAMESPACE_SCOPE_P (x)
3636 && current_function_decl
3637 && x != current_function_decl)
3638 DECL_LOCAL_FUNCTION_P (x) = 1;
3641 /* Type are looked up using the DECL_NAME, as that is what the rest of the
3642 compiler wants to use. */
3643 if (TREE_CODE (x) == TYPE_DECL || TREE_CODE (x) == VAR_DECL
3644 || TREE_CODE (x) == NAMESPACE_DECL)
3645 name = DECL_NAME (x);
3650 /* Not needed...see below. */
3654 if (TREE_CODE (name) == TEMPLATE_ID_EXPR)
3655 name = TREE_OPERAND (name, 0);
3657 /* Namespace-scoped variables are not found in the current level. */
3658 if (TREE_CODE (x) == VAR_DECL && DECL_NAMESPACE_SCOPE_P (x))
3659 t = namespace_binding (name, DECL_CONTEXT (x));
3661 t = lookup_name_current_level (name);
3662 if (t == error_mark_node)
3664 /* error_mark_node is 0 for a while during initialization! */
3666 cp_error_at ("`%#D' used prior to declaration", x);
3669 else if (t != NULL_TREE)
3672 /* This is turned off until I have time to do it right (bpk). */
3673 /* With the code below that uses it... */
3674 file = DECL_SOURCE_FILE (t);
3675 line = DECL_SOURCE_LINE (t);
3677 if (TREE_CODE (t) == PARM_DECL)
3679 if (DECL_CONTEXT (t) == NULL_TREE)
3680 fatal ("parse errors have confused me too much");
3682 /* Check for duplicate params. */
3683 if (duplicate_decls (x, t))
3686 else if (((TREE_CODE (x) == FUNCTION_DECL && DECL_LANGUAGE (x) == lang_c)
3687 || DECL_FUNCTION_TEMPLATE_P (x))
3688 && is_overloaded_fn (t))
3689 /* Don't do anything just yet. */;
3690 else if (t == wchar_decl_node)
3692 if (pedantic && ! DECL_IN_SYSTEM_HEADER (x))
3693 cp_pedwarn ("redeclaration of wchar_t as `%T'", TREE_TYPE (x));
3695 /* Throw away the redeclaration. */
3698 else if (TREE_CODE (t) != TREE_CODE (x))
3700 if (duplicate_decls (x, t))
3703 else if (duplicate_decls (x, t))
3706 /* This is turned off until I have time to do it right (bpk). */
3708 /* Also warn if they did a prototype with `static' on it, but
3709 then later left the `static' off. */
3710 if (! TREE_PUBLIC (name) && TREE_PUBLIC (x))
3712 if (DECL_LANG_SPECIFIC (t) && DECL_FRIEND_P (t))
3717 cp_warning ("`static' missing from declaration of `%D'",
3719 warning_with_file_and_line (file, line,
3720 "previous declaration of `%s'",
3721 decl_as_string (t, 0));
3724 /* Now fix things so it'll do what they expect. */
3725 if (current_function_decl)
3726 TREE_PUBLIC (current_function_decl) = 0;
3728 /* Due to interference in memory reclamation (X may be
3729 obstack-deallocated at this point), we must guard against
3730 one really special case. [jason: This should be handled
3731 by start_function] */
3732 if (current_function_decl == x)
3733 current_function_decl = t;
3735 if (TREE_CODE (t) == TYPE_DECL)
3736 SET_IDENTIFIER_TYPE_VALUE (name, TREE_TYPE (t));
3737 else if (TREE_CODE (t) == FUNCTION_DECL)
3738 check_default_args (t);
3742 else if (DECL_MAIN_P (x))
3744 /* A redeclaration of main, but not a duplicate of the
3749 This function shall not be overloaded. */
3750 cp_error_at ("invalid redeclaration of `%D'", t);
3751 cp_error ("as `%D'", x);
3752 /* We don't try to push this declaration since that
3758 check_template_shadow (x);
3760 /* If this is a function conjured up by the backend, massage it
3761 so it looks friendly. */
3762 if (TREE_CODE (x) == FUNCTION_DECL
3763 && ! DECL_LANG_SPECIFIC (x))
3765 retrofit_lang_decl (x);
3766 DECL_LANGUAGE (x) = lang_c;
3769 if (TREE_CODE (x) == FUNCTION_DECL && ! DECL_FUNCTION_MEMBER_P (x))
3771 t = push_overloaded_decl (x, PUSH_LOCAL);
3774 if (!namespace_bindings_p ())
3775 /* We do not need to create a binding for this name;
3776 push_overloaded_decl will have already done so if
3778 need_new_binding = 0;
3780 else if (DECL_FUNCTION_TEMPLATE_P (x) && DECL_NAMESPACE_SCOPE_P (x))
3782 t = push_overloaded_decl (x, PUSH_GLOBAL);
3784 add_decl_to_level (x, NAMESPACE_LEVEL (CP_DECL_CONTEXT (t)));
3788 /* If declaring a type as a typedef, copy the type (unless we're
3789 at line 0), and install this TYPE_DECL as the new type's typedef
3790 name. See the extensive comment in ../c-decl.c (pushdecl). */
3791 if (TREE_CODE (x) == TYPE_DECL)
3793 tree type = TREE_TYPE (x);
3794 if (DECL_SOURCE_LINE (x) == 0)
3796 if (TYPE_NAME (type) == 0)
3797 TYPE_NAME (type) = x;
3799 else if (type != error_mark_node && TYPE_NAME (type) != x
3800 /* We don't want to copy the type when all we're
3801 doing is making a TYPE_DECL for the purposes of
3803 && (!TYPE_NAME (type)
3804 || TYPE_NAME (type) != DECL_ABSTRACT_ORIGIN (x)))
3806 DECL_ORIGINAL_TYPE (x) = type;
3807 type = build_type_copy (type);
3808 TYPE_STUB_DECL (type) = TYPE_STUB_DECL (DECL_ORIGINAL_TYPE (x));
3809 TYPE_NAME (type) = x;
3810 TREE_TYPE (x) = type;
3813 if (type != error_mark_node
3815 && TYPE_IDENTIFIER (type))
3816 set_identifier_type_value_with_scope (DECL_NAME (x), type,
3817 current_binding_level);
3821 /* Multiple external decls of the same identifier ought to match.
3823 We get warnings about inline functions where they are defined.
3824 We get warnings about other functions from push_overloaded_decl.
3826 Avoid duplicate warnings where they are used. */
3827 if (TREE_PUBLIC (x) && TREE_CODE (x) != FUNCTION_DECL)
3831 if (IDENTIFIER_NAMESPACE_VALUE (name) != NULL_TREE
3832 && (DECL_EXTERNAL (IDENTIFIER_NAMESPACE_VALUE (name))
3833 || TREE_PUBLIC (IDENTIFIER_NAMESPACE_VALUE (name))))
3834 decl = IDENTIFIER_NAMESPACE_VALUE (name);
3839 /* If different sort of thing, we already gave an error. */
3840 && TREE_CODE (decl) == TREE_CODE (x)
3841 && !same_type_p (TREE_TYPE (x), TREE_TYPE (decl)))
3843 cp_pedwarn ("type mismatch with previous external decl", x);
3844 cp_pedwarn_at ("previous external decl of `%#D'", decl);
3848 /* This name is new in its binding level.
3849 Install the new declaration and return it. */
3850 if (namespace_bindings_p ())
3852 /* Install a global value. */
3854 /* If the first global decl has external linkage,
3855 warn if we later see static one. */
3856 if (IDENTIFIER_GLOBAL_VALUE (name) == NULL_TREE && TREE_PUBLIC (x))
3857 TREE_PUBLIC (name) = 1;
3859 if (!(TREE_CODE (x) == TYPE_DECL && DECL_ARTIFICIAL (x)
3861 /* For an ordinary function, we create a binding from
3862 the mangled name (i.e., NAME) to the DECL. But, for
3863 an `extern "C"' function, the mangled name and the
3864 ordinary name are the same so we need not do this. */
3865 && !(TREE_CODE (x) == FUNCTION_DECL &&
3866 DECL_LANGUAGE (x) == lang_c))
3868 if (TREE_CODE (x) == FUNCTION_DECL)
3870 ((IDENTIFIER_GLOBAL_VALUE (name) == NULL_TREE)
3871 || (IDENTIFIER_GLOBAL_VALUE (name) == x), 378);
3872 SET_IDENTIFIER_NAMESPACE_VALUE (name, x);
3875 /* Don't forget if the function was used via an implicit decl. */
3876 if (IDENTIFIER_IMPLICIT_DECL (name)
3877 && TREE_USED (IDENTIFIER_IMPLICIT_DECL (name)))
3880 /* Don't forget if its address was taken in that way. */
3881 if (IDENTIFIER_IMPLICIT_DECL (name)
3882 && TREE_ADDRESSABLE (IDENTIFIER_IMPLICIT_DECL (name)))
3883 TREE_ADDRESSABLE (x) = 1;
3885 /* Warn about mismatches against previous implicit decl. */
3886 if (IDENTIFIER_IMPLICIT_DECL (name) != NULL_TREE
3887 /* If this real decl matches the implicit, don't complain. */
3888 && ! (TREE_CODE (x) == FUNCTION_DECL
3889 && TREE_TYPE (TREE_TYPE (x)) == integer_type_node))
3891 ("`%D' was previously implicitly declared to return `int'", x);
3893 /* If new decl is `static' and an `extern' was seen previously,
3895 if (x != NULL_TREE && t != NULL_TREE && decls_match (x, t))
3896 warn_extern_redeclared_static (x, t);
3900 /* Here to install a non-global value. */
3901 tree oldlocal = IDENTIFIER_VALUE (name);
3902 tree oldglobal = IDENTIFIER_NAMESPACE_VALUE (name);
3904 if (need_new_binding)
3906 push_local_binding (name, x, 0);
3907 /* Because push_local_binding will hook X on to the
3908 current_binding_level's name list, we don't want to
3909 do that again below. */
3910 need_new_binding = 0;
3913 /* If this is a TYPE_DECL, push it into the type value slot. */
3914 if (TREE_CODE (x) == TYPE_DECL)
3915 set_identifier_type_value_with_scope (name, TREE_TYPE (x),
3916 current_binding_level);
3918 /* Clear out any TYPE_DECL shadowed by a namespace so that
3919 we won't think this is a type. The C struct hack doesn't
3920 go through namespaces. */
3921 if (TREE_CODE (x) == NAMESPACE_DECL)
3922 set_identifier_type_value_with_scope (name, NULL_TREE,
3923 current_binding_level);
3925 /* If this is an extern function declaration, see if we
3926 have a global definition or declaration for the function. */
3927 if (oldlocal == NULL_TREE
3928 && DECL_EXTERNAL (x)
3929 && oldglobal != NULL_TREE
3930 && TREE_CODE (x) == FUNCTION_DECL
3931 && TREE_CODE (oldglobal) == FUNCTION_DECL)
3933 /* We have one. Their types must agree. */
3934 if (decls_match (x, oldglobal))
3938 cp_warning ("extern declaration of `%#D' doesn't match", x);
3939 cp_warning_at ("global declaration `%#D'", oldglobal);
3942 /* If we have a local external declaration,
3943 and no file-scope declaration has yet been seen,
3944 then if we later have a file-scope decl it must not be static. */
3945 if (oldlocal == NULL_TREE
3946 && oldglobal == NULL_TREE
3947 && DECL_EXTERNAL (x)
3949 TREE_PUBLIC (name) = 1;
3951 if (DECL_FROM_INLINE (x))
3952 /* Inline decls shadow nothing. */;
3954 /* Warn if shadowing an argument at the top level of the body. */
3955 else if (oldlocal != NULL_TREE && !DECL_EXTERNAL (x)
3956 && TREE_CODE (oldlocal) == PARM_DECL
3957 /* Don't complain if it's from an enclosing function. */
3958 && DECL_CONTEXT (oldlocal) == current_function_decl
3959 && TREE_CODE (x) != PARM_DECL)
3961 /* Go to where the parms should be and see if we
3963 struct binding_level *b = current_binding_level->level_chain;
3969 if (b->parm_flag == 1)
3970 cp_error ("declaration of `%#D' shadows a parameter", name);
3972 else if (warn_shadow && oldlocal != NULL_TREE
3973 && current_binding_level->is_for_scope
3974 && !DECL_DEAD_FOR_LOCAL (oldlocal))
3976 warning ("variable `%s' shadows local",
3977 IDENTIFIER_POINTER (name));
3978 cp_warning_at (" this is the shadowed declaration", oldlocal);
3980 /* Maybe warn if shadowing something else. */
3981 else if (warn_shadow && !DECL_EXTERNAL (x)
3982 /* No shadow warnings for internally generated vars. */
3983 && ! DECL_ARTIFICIAL (x)
3984 /* No shadow warnings for vars made for inlining. */
3985 && ! DECL_FROM_INLINE (x))
3987 if (oldlocal != NULL_TREE && TREE_CODE (oldlocal) == PARM_DECL)
3988 warning ("declaration of `%s' shadows a parameter",
3989 IDENTIFIER_POINTER (name));
3990 else if (IDENTIFIER_CLASS_VALUE (name) != NULL_TREE
3991 && current_class_ptr
3992 && !TREE_STATIC (name))
3993 warning ("declaration of `%s' shadows a member of `this'",
3994 IDENTIFIER_POINTER (name));
3995 else if (oldlocal != NULL_TREE)
3996 warning ("declaration of `%s' shadows previous local",
3997 IDENTIFIER_POINTER (name));
3998 else if (oldglobal != NULL_TREE)
3999 /* XXX shadow warnings in outer-more namespaces */
4000 warning ("declaration of `%s' shadows global declaration",
4001 IDENTIFIER_POINTER (name));
4005 if (TREE_CODE (x) == FUNCTION_DECL)
4006 check_default_args (x);
4008 /* Keep count of variables in this level with incomplete type. */
4009 if (TREE_CODE (x) == VAR_DECL
4010 && TREE_TYPE (x) != error_mark_node
4011 && ((TYPE_SIZE (TREE_TYPE (x)) == NULL_TREE
4012 && PROMOTES_TO_AGGR_TYPE (TREE_TYPE (x), ARRAY_TYPE))
4013 /* RTTI TD entries are created while defining the type_info. */
4014 || (TYPE_LANG_SPECIFIC (TREE_TYPE (x))
4015 && TYPE_BEING_DEFINED (TREE_TYPE (x)))))
4016 current_binding_level->incomplete
4017 = tree_cons (NULL_TREE, x, current_binding_level->incomplete);
4020 if (need_new_binding)
4021 add_decl_to_level (x,
4022 DECL_NAMESPACE_SCOPE_P (x)
4023 ? NAMESPACE_LEVEL (CP_DECL_CONTEXT (x))
4024 : current_binding_level);
4029 /* Same as pushdecl, but define X in binding-level LEVEL. We rely on the
4030 caller to set DECL_CONTEXT properly. */
4033 pushdecl_with_scope (x, level)
4035 struct binding_level *level;
4037 register struct binding_level *b;
4038 tree function_decl = current_function_decl;
4040 current_function_decl = NULL_TREE;
4041 if (level->parm_flag == 2)
4043 b = class_binding_level;
4044 class_binding_level = level;
4045 pushdecl_class_level (x);
4046 class_binding_level = b;
4050 b = current_binding_level;
4051 current_binding_level = level;
4053 current_binding_level = b;
4055 current_function_decl = function_decl;
4059 /* Like pushdecl, only it places X in the current namespace,
4063 pushdecl_namespace_level (x)
4066 register struct binding_level *b = current_binding_level;
4069 t = pushdecl_with_scope (x, NAMESPACE_LEVEL (current_namespace));
4071 /* Now, the type_shadowed stack may screw us. Munge it so it does
4073 if (TREE_CODE (x) == TYPE_DECL)
4075 tree name = DECL_NAME (x);
4077 tree *ptr = (tree *)0;
4078 for (; b != global_binding_level; b = b->level_chain)
4080 tree shadowed = b->type_shadowed;
4081 for (; shadowed; shadowed = TREE_CHAIN (shadowed))
4082 if (TREE_PURPOSE (shadowed) == name)
4084 ptr = &TREE_VALUE (shadowed);
4085 /* Can't break out of the loop here because sometimes
4086 a binding level will have duplicate bindings for
4087 PT names. It's gross, but I haven't time to fix it. */
4090 newval = TREE_TYPE (x);
4091 if (ptr == (tree *)0)
4093 /* @@ This shouldn't be needed. My test case "zstring.cc" trips
4094 up here if this is changed to an assertion. --KR */
4095 SET_IDENTIFIER_TYPE_VALUE (name, newval);
4105 /* Like pushdecl, only it places X in GLOBAL_BINDING_LEVEL,
4109 pushdecl_top_level (x)
4112 push_to_top_level ();
4113 x = pushdecl_namespace_level (x);
4114 pop_from_top_level ();
4118 /* Make the declaration of X appear in CLASS scope. */
4121 pushdecl_class_level (x)
4124 /* Don't use DECL_ASSEMBLER_NAME here! Everything that looks in class
4125 scope looks for the pre-mangled name. */
4128 if (TREE_CODE (x) == OVERLOAD)
4129 x = OVL_CURRENT (x);
4130 name = DECL_NAME (x);
4134 push_class_level_binding (name, x);
4135 if (TREE_CODE (x) == TYPE_DECL)
4136 set_identifier_type_value (name, TREE_TYPE (x));
4138 else if (ANON_AGGR_TYPE_P (TREE_TYPE (x)))
4142 for (f = TYPE_FIELDS (TREE_TYPE (x));
4145 pushdecl_class_level (f);
4149 /* Enter DECL into the symbol table, if that's appropriate. Returns
4150 DECL, or a modified version thereof. */
4153 maybe_push_decl (decl)
4156 tree type = TREE_TYPE (decl);
4158 /* Add this decl to the current binding level, but not if it comes
4159 from another scope, e.g. a static member variable. TEM may equal
4160 DECL or it may be a previous decl of the same name. */
4161 if ((TREE_CODE (decl) != PARM_DECL
4162 && DECL_CONTEXT (decl) != NULL_TREE
4163 /* Definitions of namespace members outside their namespace are
4165 && TREE_CODE (DECL_CONTEXT (decl)) != NAMESPACE_DECL)
4166 || (TREE_CODE (decl) == TEMPLATE_DECL && !namespace_bindings_p ())
4167 || TREE_CODE (type) == UNKNOWN_TYPE
4168 /* The declaration of a template specialization does not affect
4169 the functions available for overload resolution, so we do not
4171 || (TREE_CODE (decl) == FUNCTION_DECL
4172 && DECL_TEMPLATE_SPECIALIZATION (decl)))
4175 return pushdecl (decl);
4179 /* This function is used to push the mangled decls for nested types into
4180 the appropriate scope. Previously pushdecl_top_level was used, but that
4181 is incorrect for members of local classes. */
4184 pushdecl_nonclass_level (x)
4187 struct binding_level *b = current_binding_level;
4189 my_friendly_assert (b->parm_flag != 2, 180);
4192 /* Get out of template binding levels */
4193 while (b->pseudo_global)
4197 pushdecl_with_scope (x, b);
4201 /* Make the declaration(s) of X appear in CLASS scope
4202 under the name NAME. */
4205 push_class_level_binding (name, x)
4210 /* The class_binding_level will be NULL if x is a template
4211 parameter name in a member template. */
4212 if (!class_binding_level)
4215 /* Make sure that this new member does not have the same name
4216 as a template parameter. */
4217 if (TYPE_BEING_DEFINED (current_class_type))
4218 check_template_shadow (x);
4220 /* If this declaration shadows a declaration from an enclosing
4221 class, then we will need to restore IDENTIFIER_CLASS_VALUE when
4222 we leave this class. Record the shadowed declaration here. */
4223 binding = IDENTIFIER_BINDING (name);
4225 && ((TREE_CODE (x) == OVERLOAD
4226 && BINDING_VALUE (binding)
4227 && is_overloaded_fn (BINDING_VALUE (binding)))
4228 || INHERITED_VALUE_BINDING_P (binding)))
4233 /* If the old binding was from a base class, and was for a tag
4234 name, slide it over to make room for the new binding. The
4235 old binding is still visible if explicitly qualified with a
4237 if (INHERITED_VALUE_BINDING_P (binding)
4238 && BINDING_VALUE (binding)
4239 && TREE_CODE (BINDING_VALUE (binding)) == TYPE_DECL
4240 && DECL_ARTIFICIAL (BINDING_VALUE (binding))
4241 && !(TREE_CODE (x) == TYPE_DECL && DECL_ARTIFICIAL (x)))
4243 old_decl = BINDING_TYPE (binding);
4244 BINDING_TYPE (binding) = BINDING_VALUE (binding);
4245 BINDING_VALUE (binding) = NULL_TREE;
4246 INHERITED_VALUE_BINDING_P (binding) = 0;
4249 old_decl = BINDING_VALUE (binding);
4251 /* There was already a binding for X containing fewer
4252 functions than are named in X. Find the previous
4253 declaration of X on the class-shadowed list, and update it. */
4254 for (shadow = class_binding_level->class_shadowed;
4256 shadow = TREE_CHAIN (shadow))
4257 if (TREE_PURPOSE (shadow) == name
4258 && TREE_TYPE (shadow) == old_decl)
4260 BINDING_VALUE (binding) = x;
4261 INHERITED_VALUE_BINDING_P (binding) = 0;
4262 TREE_TYPE (shadow) = x;
4267 /* If we didn't replace an existing binding, put the binding on the
4268 stack of bindings for the identifier, and update
4269 IDENTIFIER_CLASS_VALUE. */
4270 if (push_class_binding (name, x))
4272 class_binding_level->class_shadowed
4273 = tree_cons (name, IDENTIFIER_CLASS_VALUE (name),
4274 class_binding_level->class_shadowed);
4275 /* Record the value we are binding NAME to so that we can know
4276 what to pop later. */
4277 TREE_TYPE (class_binding_level->class_shadowed) = x;
4281 /* Insert another USING_DECL into the current binding level,
4282 returning this declaration. If this is a redeclaration,
4283 do nothing and return NULL_TREE. */
4286 push_using_decl (scope, name)
4292 my_friendly_assert (TREE_CODE (scope) == NAMESPACE_DECL, 383);
4293 my_friendly_assert (TREE_CODE (name) == IDENTIFIER_NODE, 384);
4294 for (decl = current_binding_level->usings; decl; decl = TREE_CHAIN (decl))
4295 if (DECL_INITIAL (decl) == scope && DECL_NAME (decl) == name)
4299 decl = build_lang_decl (USING_DECL, name, void_type_node);
4300 DECL_INITIAL (decl) = scope;
4301 TREE_CHAIN (decl) = current_binding_level->usings;
4302 current_binding_level->usings = decl;
4306 /* Add namespace to using_directives. Return NULL_TREE if nothing was
4307 changed (i.e. there was already a directive), or the fresh
4308 TREE_LIST otherwise. */
4311 push_using_directive (used)
4314 tree ud = current_binding_level->using_directives;
4315 tree iter, ancestor;
4317 /* Check if we already have this. */
4318 if (purpose_member (used, ud) != NULL_TREE)
4321 /* Recursively add all namespaces used. */
4322 for (iter = DECL_NAMESPACE_USING (used); iter; iter = TREE_CHAIN (iter))
4323 push_using_directive (TREE_PURPOSE (iter));
4325 ancestor = namespace_ancestor (current_decl_namespace (), used);
4326 ud = current_binding_level->using_directives;
4327 ud = tree_cons (used, ancestor, ud);
4328 current_binding_level->using_directives = ud;
4332 /* DECL is a FUNCTION_DECL for a non-member function, which may have
4333 other definitions already in place. We get around this by making
4334 the value of the identifier point to a list of all the things that
4335 want to be referenced by that name. It is then up to the users of
4336 that name to decide what to do with that list.
4338 DECL may also be a TEMPLATE_DECL, with a FUNCTION_DECL in its DECL_RESULT
4339 slot. It is dealt with the same way.
4341 FLAGS is a bitwise-or of the following values:
4342 PUSH_LOCAL: Bind DECL in the current scope, rather than at
4344 PUSH_USING: DECL is being pushed as the result of a using
4347 The value returned may be a previous declaration if we guessed wrong
4348 about what language DECL should belong to (C or C++). Otherwise,
4349 it's always DECL (and never something that's not a _DECL). */
4352 push_overloaded_decl (decl, flags)
4356 tree name = DECL_NAME (decl);
4359 int doing_global = (namespace_bindings_p () || !(flags & PUSH_LOCAL));
4362 old = namespace_binding (name, DECL_CONTEXT (decl));
4364 old = lookup_name_current_level (name);
4368 if (TREE_CODE (old) == TYPE_DECL && DECL_ARTIFICIAL (old))
4370 tree t = TREE_TYPE (old);
4371 if (IS_AGGR_TYPE (t) && warn_shadow
4372 && (! DECL_IN_SYSTEM_HEADER (decl)
4373 || ! DECL_IN_SYSTEM_HEADER (old)))
4374 cp_warning ("`%#D' hides constructor for `%#T'", decl, t);
4377 else if (is_overloaded_fn (old))
4381 for (tmp = old; tmp; tmp = OVL_NEXT (tmp))
4383 tree fn = OVL_CURRENT (tmp);
4385 if (TREE_CODE (tmp) == OVERLOAD && OVL_USED (tmp)
4386 && !(flags & PUSH_USING)
4387 && compparms (TYPE_ARG_TYPES (TREE_TYPE (fn)),
4388 TYPE_ARG_TYPES (TREE_TYPE (decl))))
4389 cp_error ("`%#D' conflicts with previous using declaration `%#D'",
4392 if (duplicate_decls (decl, fn))
4398 cp_error_at ("previous non-function declaration `%#D'", old);
4399 cp_error ("conflicts with function declaration `%#D'", decl);
4404 if (old || TREE_CODE (decl) == TEMPLATE_DECL)
4406 if (old && TREE_CODE (old) != OVERLOAD)
4407 new_binding = ovl_cons (decl, ovl_cons (old, NULL_TREE));
4409 new_binding = ovl_cons (decl, old);
4410 if (flags & PUSH_USING)
4411 OVL_USED (new_binding) = 1;
4414 /* NAME is not ambiguous. */
4418 set_namespace_binding (name, current_namespace, new_binding);
4421 /* We only create an OVERLOAD if there was a previous binding at
4422 this level, or if decl is a template. In the former case, we
4423 need to remove the old binding and replace it with the new
4424 binding. We must also run through the NAMES on the binding
4425 level where the name was bound to update the chain. */
4427 if (TREE_CODE (new_binding) == OVERLOAD && old)
4431 for (d = &BINDING_LEVEL (IDENTIFIER_BINDING (name))->names;
4433 d = &TREE_CHAIN (*d))
4435 || (TREE_CODE (*d) == TREE_LIST
4436 && TREE_VALUE (*d) == old))
4438 if (TREE_CODE (*d) == TREE_LIST)
4439 /* Just replace the old binding with the new. */
4440 TREE_VALUE (*d) = new_binding;
4442 /* Build a TREE_LIST to wrap the OVERLOAD. */
4443 *d = tree_cons (NULL_TREE, new_binding,
4446 /* And update the CPLUS_BINDING node. */
4447 BINDING_VALUE (IDENTIFIER_BINDING (name))
4452 /* We should always find a previous binding in this case. */
4453 my_friendly_abort (0);
4456 /* Install the new binding. */
4457 push_local_binding (name, new_binding, flags);
4463 /* Generate an implicit declaration for identifier FUNCTIONID
4464 as a function of type int (). Print a warning if appropriate. */
4467 implicitly_declare (functionid)
4472 /* We used to reuse an old implicit decl here,
4473 but this loses with inline functions because it can clobber
4474 the saved decl chains. */
4475 decl = build_lang_decl (FUNCTION_DECL, functionid, default_function_type);
4477 DECL_EXTERNAL (decl) = 1;
4478 TREE_PUBLIC (decl) = 1;
4480 /* ANSI standard says implicit declarations are in the innermost block.
4481 So we record the decl in the standard fashion. */
4483 rest_of_decl_compilation (decl, NULL_PTR, 0, 0);
4486 /* Only one warning per identifier. */
4487 && IDENTIFIER_IMPLICIT_DECL (functionid) == NULL_TREE)
4489 cp_pedwarn ("implicit declaration of function `%#D'", decl);
4492 SET_IDENTIFIER_IMPLICIT_DECL (functionid, decl);
4497 /* Return zero if the declaration NEWDECL is valid
4498 when the declaration OLDDECL (assumed to be for the same name)
4499 has already been seen.
4500 Otherwise return an error message format string with a %s
4501 where the identifier should go. */
4504 redeclaration_error_message (newdecl, olddecl)
4505 tree newdecl, olddecl;
4507 if (TREE_CODE (newdecl) == TYPE_DECL)
4509 /* Because C++ can put things into name space for free,
4510 constructs like "typedef struct foo { ... } foo"
4511 would look like an erroneous redeclaration. */
4512 if (same_type_p (TREE_TYPE (newdecl), TREE_TYPE (olddecl)))
4515 return "redefinition of `%#D'";
4517 else if (TREE_CODE (newdecl) == FUNCTION_DECL)
4519 /* If this is a pure function, its olddecl will actually be
4520 the original initialization to `0' (which we force to call
4521 abort()). Don't complain about redefinition in this case. */
4522 if (DECL_LANG_SPECIFIC (olddecl) && DECL_ABSTRACT_VIRTUAL_P (olddecl))
4525 /* If both functions come from different namespaces, this is not
4526 a redeclaration - this is a conflict with a used function. */
4527 if (DECL_NAMESPACE_SCOPE_P (olddecl)
4528 && DECL_CONTEXT (olddecl) != DECL_CONTEXT (newdecl))
4529 return "`%D' conflicts with used function";
4531 /* We'll complain about linkage mismatches in
4532 warn_extern_redeclared_static. */
4534 /* Defining the same name twice is no good. */
4535 if (DECL_INITIAL (olddecl) != NULL_TREE
4536 && DECL_INITIAL (newdecl) != NULL_TREE)
4538 if (DECL_NAME (olddecl) == NULL_TREE)
4539 return "`%#D' not declared in class";
4541 return "redefinition of `%#D'";
4545 else if (TREE_CODE (newdecl) == TEMPLATE_DECL)
4547 if ((TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == FUNCTION_DECL
4548 && DECL_INITIAL (DECL_TEMPLATE_RESULT (newdecl))
4549 && DECL_INITIAL (DECL_TEMPLATE_RESULT (olddecl)))
4550 || (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == TYPE_DECL
4551 && TYPE_SIZE (TREE_TYPE (newdecl))
4552 && TYPE_SIZE (TREE_TYPE (olddecl))))
4553 return "redefinition of `%#D'";
4556 else if (toplevel_bindings_p ())
4558 /* Objects declared at top level: */
4559 /* If at least one is a reference, it's ok. */
4560 if (DECL_EXTERNAL (newdecl) || DECL_EXTERNAL (olddecl))
4562 /* Reject two definitions. */
4563 return "redefinition of `%#D'";
4567 /* Objects declared with block scope: */
4568 /* Reject two definitions, and reject a definition
4569 together with an external reference. */
4570 if (!(DECL_EXTERNAL (newdecl) && DECL_EXTERNAL (olddecl)))
4571 return "redeclaration of `%#D'";
4576 /* Create a new label, named ID. */
4579 make_label_decl (id, local_p)
4585 decl = build_decl (LABEL_DECL, id, void_type_node);
4587 /* Make sure every label has an rtx. */
4590 DECL_CONTEXT (decl) = current_function_decl;
4591 DECL_MODE (decl) = VOIDmode;
4592 C_DECLARED_LABEL_FLAG (decl) = local_p;
4594 /* Say where one reference is to the label, for the sake of the
4595 error if it is not defined. */
4596 DECL_SOURCE_LINE (decl) = lineno;
4597 DECL_SOURCE_FILE (decl) = input_filename;
4599 /* Record the fact that this identifier is bound to this label. */
4600 SET_IDENTIFIER_LABEL_VALUE (id, decl);
4602 /* Record this label on the list of used labels so that we can check
4603 at the end of the function to see whether or not the label was
4604 actually defined. */
4605 if ((named_label_uses == NULL || named_label_uses->label_decl != decl)
4606 && (named_label_uses == NULL
4607 || named_label_uses->names_in_scope != current_binding_level->names
4608 || named_label_uses->label_decl != decl))
4610 struct named_label_list *new_ent;
4612 = (struct named_label_list*)oballoc (sizeof (struct named_label_list));
4613 new_ent->label_decl = decl;
4614 new_ent->names_in_scope = current_binding_level->names;
4615 new_ent->binding_level = current_binding_level;
4616 new_ent->lineno_o_goto = lineno;
4617 new_ent->filename_o_goto = input_filename;
4618 new_ent->next = named_label_uses;
4619 named_label_uses = new_ent;
4625 /* Look for a label named ID in the current function. If one cannot
4626 be found, create one. (We keep track of used, but undefined,
4627 labels, and complain about them at the end of a function.) */
4635 /* You can't use labels at global scope. */
4636 if (current_function_decl == NULL_TREE)
4638 error ("label `%s' referenced outside of any function",
4639 IDENTIFIER_POINTER (id));
4643 /* See if we've already got this label. */
4644 decl = IDENTIFIER_LABEL_VALUE (id);
4645 if (decl != NULL_TREE && DECL_CONTEXT (decl) == current_function_decl)
4648 /* Record this label on the list of labels used in this function.
4649 We do this before calling make_label_decl so that we get the
4650 IDENTIFIER_LABEL_VALUE before the new label is declared. */
4651 named_labels = tree_cons (IDENTIFIER_LABEL_VALUE (id), NULL_TREE,
4653 /* We need a new label. */
4654 decl = make_label_decl (id, /*local_p=*/0);
4655 /* Now fill in the information we didn't have before. */
4656 TREE_VALUE (named_labels) = decl;
4661 /* Declare a local label named ID. */
4664 declare_local_label (id)
4669 /* Add a new entry to the SHADOWED_LABELS list so that when we leave
4670 this scope we can restore the old value of
4671 IDENTIFIER_TYPE_VALUE. */
4672 current_binding_level->shadowed_labels
4673 = tree_cons (IDENTIFIER_LABEL_VALUE (id), NULL_TREE,
4674 current_binding_level->shadowed_labels);
4675 /* Look for the label. */
4676 decl = make_label_decl (id, /*local_p=*/1);
4677 /* Now fill in the information we didn't have before. */
4678 TREE_VALUE (current_binding_level->shadowed_labels) = decl;
4683 /* Define a label, specifying the location in the source file.
4684 Return the LABEL_DECL node for the label, if the definition is valid.
4685 Otherwise return 0. */
4688 define_label (filename, line, name)
4693 tree decl = lookup_label (name);
4695 /* After labels, make any new cleanups go into their
4696 own new (temporary) binding contour. */
4697 current_binding_level->more_cleanups_ok = 0;
4699 if (name == get_identifier ("wchar_t"))
4700 cp_pedwarn ("label named wchar_t");
4702 if (DECL_INITIAL (decl) != NULL_TREE)
4704 cp_error ("duplicate label `%D'", decl);
4709 struct named_label_list *uses, *prev;
4713 /* Mark label as having been defined. */
4714 DECL_INITIAL (decl) = error_mark_node;
4715 /* Say where in the source. */
4716 DECL_SOURCE_FILE (decl) = filename;
4717 DECL_SOURCE_LINE (decl) = line;
4720 uses = named_label_uses;
4721 while (uses != NULL)
4722 if (uses->label_decl == decl)
4724 struct binding_level *b = current_binding_level;
4727 tree new_decls = b->names;
4728 tree old_decls = (b == uses->binding_level)
4729 ? uses->names_in_scope : NULL_TREE;
4730 while (new_decls != old_decls)
4732 if (TREE_CODE (new_decls) == VAR_DECL
4733 /* Don't complain about crossing initialization
4734 of internal entities. They can't be accessed,
4735 and they should be cleaned up
4736 by the time we get to the label. */
4737 && ! DECL_ARTIFICIAL (new_decls)
4738 && !(DECL_INITIAL (new_decls) == NULL_TREE
4739 && pod_type_p (TREE_TYPE (new_decls))))
4741 /* This is really only important if we're crossing
4742 an initialization. The POD stuff is just
4743 pedantry; why should it matter if the class
4744 contains a field of pointer to member type? */
4745 int problem = (DECL_INITIAL (new_decls)
4746 || (TYPE_NEEDS_CONSTRUCTING
4747 (TREE_TYPE (new_decls))));
4753 cp_error ("jump to label `%D'", decl);
4754 error_with_file_and_line
4755 (uses->filename_o_goto,
4756 uses->lineno_o_goto, " from here");
4760 cp_pedwarn ("jump to label `%D'", decl);
4761 pedwarn_with_file_and_line
4762 (uses->filename_o_goto,
4763 uses->lineno_o_goto, " from here");
4769 cp_error_at (" crosses initialization of `%#D'",
4772 cp_pedwarn_at (" enters scope of non-POD `%#D'",
4775 new_decls = TREE_CHAIN (new_decls);
4777 if (b == uses->binding_level)
4779 if (b->eh_region && ! saw_eh)
4783 cp_error ("jump to label `%D'", decl);
4784 error_with_file_and_line
4785 (uses->filename_o_goto,
4786 uses->lineno_o_goto, " from here");
4789 error (" enters exception handling block");
4796 prev->next = uses->next;
4798 named_label_uses = uses->next;
4807 current_function_return_value = NULL_TREE;
4814 struct binding_level *level;
4815 struct cp_switch *next;
4818 static struct cp_switch *switch_stack;
4824 = (struct cp_switch *) oballoc (sizeof (struct cp_switch));
4825 p->level = current_binding_level;
4826 p->next = switch_stack;
4833 switch_stack = switch_stack->next;
4836 /* Note that we've seen a definition of a case label, and complain if this
4837 is a bad place for one. */
4840 define_case_label ()
4842 tree cleanup = last_cleanup_this_contour ();
4843 struct binding_level *b = current_binding_level;
4847 /* Don't crash; we'll complain in do_case. */
4852 static int explained = 0;
4853 cp_warning_at ("destructor needed for `%#D'", TREE_PURPOSE (cleanup));
4854 warning ("where case label appears here");
4857 warning ("(enclose actions of previous case statements requiring");
4858 warning ("destructors in their own binding contours.)");
4863 for (; b && b != switch_stack->level; b = b->level_chain)
4865 tree new_decls = b->names;
4866 for (; new_decls; new_decls = TREE_CHAIN (new_decls))
4868 if (TREE_CODE (new_decls) == VAR_DECL
4869 /* Don't complain about crossing initialization
4870 of internal entities. They can't be accessed,
4871 and they should be cleaned up
4872 by the time we get to the label. */
4873 && ! DECL_ARTIFICIAL (new_decls)
4874 && ((DECL_INITIAL (new_decls) != NULL_TREE
4875 && DECL_INITIAL (new_decls) != error_mark_node)
4876 || TYPE_NEEDS_CONSTRUCTING (TREE_TYPE (new_decls))))
4879 error ("jump to case label");
4881 cp_error_at (" crosses initialization of `%#D'",
4887 /* After labels, make any new cleanups go into their
4888 own new (temporary) binding contour. */
4890 current_binding_level->more_cleanups_ok = 0;
4891 current_function_return_value = NULL_TREE;
4894 /* Return the list of declarations of the current level.
4895 Note that this list is in reverse order unless/until
4896 you nreverse it; and when you do nreverse it, you must
4897 store the result back using `storedecls' or you will lose. */
4902 return current_binding_level->names;
4905 /* Return the list of type-tags (for structs, etc) of the current level. */
4910 return current_binding_level->tags;
4913 /* Store the list of declarations of the current level.
4914 This is done for the parameter declarations of a function being defined,
4915 after they are modified in the light of any missing parameters. */
4921 current_binding_level->names = decls;
4924 /* Similarly, store the list of tags of the current level. */
4930 current_binding_level->tags = tags;
4933 /* Given NAME, an IDENTIFIER_NODE,
4934 return the structure (or union or enum) definition for that name.
4935 Searches binding levels from BINDING_LEVEL up to the global level.
4936 If THISLEVEL_ONLY is nonzero, searches only the specified context
4937 (but skips any tag-transparent contexts to find one that is
4938 meaningful for tags).
4939 FORM says which kind of type the caller wants;
4940 it is RECORD_TYPE or UNION_TYPE or ENUMERAL_TYPE.
4941 If the wrong kind of type is found, and it's not a template, an error is
4945 lookup_tag (form, name, binding_level, thislevel_only)
4946 enum tree_code form;
4948 struct binding_level *binding_level;
4951 register struct binding_level *level;
4952 /* Non-zero if, we should look past a pseudo-global level, even if
4954 int allow_pseudo_global = 1;
4956 for (level = binding_level; level; level = level->level_chain)
4959 if (ANON_AGGRNAME_P (name))
4960 for (tail = level->tags; tail; tail = TREE_CHAIN (tail))
4962 /* There's no need for error checking here, because
4963 anon names are unique throughout the compilation. */
4964 if (TYPE_IDENTIFIER (TREE_VALUE (tail)) == name)
4965 return TREE_VALUE (tail);
4967 else if (level->namespace_p)
4968 /* Do namespace lookup. */
4969 for (tail = current_namespace; 1; tail = CP_DECL_CONTEXT (tail))
4971 tree old = binding_for_name (name, tail);
4973 /* If we just skipped past a pseudo global level, even
4974 though THISLEVEL_ONLY, and we find a template class
4975 declaration, then we use the _TYPE node for the
4976 template. See the example below. */
4977 if (thislevel_only && !allow_pseudo_global
4978 && old && BINDING_VALUE (old)
4979 && DECL_CLASS_TEMPLATE_P (BINDING_VALUE (old)))
4980 old = TREE_TYPE (BINDING_VALUE (old));
4982 old = BINDING_TYPE (old);
4984 /* If it has an original type, it is a typedef, and we
4985 should not return it. */
4986 if (old && DECL_ORIGINAL_TYPE (TYPE_NAME (old)))
4988 if (old && TREE_CODE (old) != form
4989 && !(form != ENUMERAL_TYPE && TREE_CODE (old) == TEMPLATE_DECL))
4991 cp_error ("`%#D' redeclared as %C", old, form);
4996 if (thislevel_only || tail == global_namespace)
5000 for (tail = level->tags; tail; tail = TREE_CHAIN (tail))
5002 if (TREE_PURPOSE (tail) == name)
5004 enum tree_code code = TREE_CODE (TREE_VALUE (tail));
5005 /* Should tighten this up; it'll probably permit
5006 UNION_TYPE and a struct template, for example. */
5008 && !(form != ENUMERAL_TYPE && code == TEMPLATE_DECL))
5010 /* Definition isn't the kind we were looking for. */
5011 cp_error ("`%#D' redeclared as %C", TREE_VALUE (tail),
5015 return TREE_VALUE (tail);
5018 if (thislevel_only && ! level->tag_transparent)
5020 if (level->pseudo_global && allow_pseudo_global)
5022 /* We must deal with cases like this:
5024 template <class T> struct S;
5025 template <class T> struct S {};
5027 When looking up `S', for the second declaration, we
5028 would like to find the first declaration. But, we
5029 are in the pseudo-global level created for the
5030 template parameters, rather than the (surrounding)
5031 namespace level. Thus, we keep going one more level,
5032 even though THISLEVEL_ONLY is non-zero. */
5033 allow_pseudo_global = 0;
5045 set_current_level_tags_transparency (tags_transparent)
5046 int tags_transparent;
5048 current_binding_level->tag_transparent = tags_transparent;
5052 /* Given a type, find the tag that was defined for it and return the tag name.
5053 Otherwise return 0. However, the value can never be 0
5054 in the cases in which this is used.
5056 C++: If NAME is non-zero, this is the new name to install. This is
5057 done when replacing anonymous tags with real tag names. */
5060 lookup_tag_reverse (type, name)
5064 register struct binding_level *level;
5066 for (level = current_binding_level; level; level = level->level_chain)
5069 for (tail = level->tags; tail; tail = TREE_CHAIN (tail))
5071 if (TREE_VALUE (tail) == type)
5074 TREE_PURPOSE (tail) = name;
5075 return TREE_PURPOSE (tail);
5082 /* Look up NAME in the NAMESPACE. */
5085 lookup_namespace_name (namespace, name)
5086 tree namespace, name;
5089 tree template_id = NULL_TREE;
5091 my_friendly_assert (TREE_CODE (namespace) == NAMESPACE_DECL, 370);
5093 if (TREE_CODE (name) == NAMESPACE_DECL)
5094 /* This happens for A::B<int> when B is a namespace. */
5096 else if (TREE_CODE (name) == TEMPLATE_DECL)
5098 /* This happens for A::B where B is a template, and there are no
5099 template arguments. */
5100 cp_error ("invalid use of `%D'", name);
5101 return error_mark_node;
5104 namespace = ORIGINAL_NAMESPACE (namespace);
5106 if (TREE_CODE (name) == TEMPLATE_ID_EXPR)
5109 name = TREE_OPERAND (name, 0);
5110 if (TREE_CODE (name) == OVERLOAD)
5111 name = DECL_NAME (OVL_CURRENT (name));
5112 else if (TREE_CODE_CLASS (TREE_CODE (name)) == 'd')
5113 name = DECL_NAME (name);
5116 my_friendly_assert (TREE_CODE (name) == IDENTIFIER_NODE, 373);
5118 val = make_node (CPLUS_BINDING);
5119 if (!qualified_lookup_using_namespace (name, namespace, val, 0))
5120 return error_mark_node;
5122 if (BINDING_VALUE (val))
5124 val = BINDING_VALUE (val);
5128 if (DECL_CLASS_TEMPLATE_P (val))
5129 val = lookup_template_class (val,
5130 TREE_OPERAND (template_id, 1),
5131 /*in_decl=*/NULL_TREE,
5132 /*context=*/NULL_TREE,
5133 /*entering_scope=*/0);
5134 else if (DECL_FUNCTION_TEMPLATE_P (val)
5135 || TREE_CODE (val) == OVERLOAD)
5136 val = lookup_template_function (val,
5137 TREE_OPERAND (template_id, 1));
5140 cp_error ("`%D::%D' is not a template",
5142 return error_mark_node;
5146 /* If we have a single function from a using decl, pull it out. */
5147 if (TREE_CODE (val) == OVERLOAD && ! really_overloaded_fn (val))
5148 val = OVL_FUNCTION (val);
5152 cp_error ("`%D' undeclared in namespace `%D'", name, namespace);
5153 return error_mark_node;
5156 /* Hash a TYPENAME_TYPE. K is really of type `tree'. */
5158 static unsigned long
5166 hash = (((unsigned long) TYPE_CONTEXT (t))
5167 ^ ((unsigned long) DECL_NAME (TYPE_NAME (t))));
5172 /* Compare two TYPENAME_TYPEs. K1 and K2 are really of type `tree'. */
5175 typename_compare (k1, k2)
5186 d1 = TYPE_NAME (t1);
5187 d2 = TYPE_NAME (t2);
5189 return (DECL_NAME (d1) == DECL_NAME (d2)
5190 && same_type_p (TYPE_CONTEXT (t1), TYPE_CONTEXT (t2))
5191 && ((TREE_TYPE (t1) != NULL_TREE)
5192 == (TREE_TYPE (t2) != NULL_TREE))
5193 && same_type_p (TREE_TYPE (t1), TREE_TYPE (t2))
5194 && TYPENAME_TYPE_FULLNAME (t1) == TYPENAME_TYPE_FULLNAME (t2));
5197 /* Build a TYPENAME_TYPE. If the type is `typename T::t', CONTEXT is
5198 the type of `T', NAME is the IDENTIFIER_NODE for `t'. If BASE_TYPE
5199 is non-NULL, this type is being created by the implicit typename
5200 extension, and BASE_TYPE is a type named `t' in some base class of
5201 `T' which depends on template parameters.
5203 Returns the new TYPENAME_TYPE. */
5206 build_typename_type (context, name, fullname, base_type)
5214 struct hash_entry* e;
5216 static struct hash_table ht;
5220 static struct hash_table *h = &ht;
5221 if (!hash_table_init (&ht, &hash_newfunc, &typename_hash,
5223 fatal ("virtual memory exhausted");
5224 ggc_add_tree_hash_table_root (&h, 1);
5227 /* Build the TYPENAME_TYPE. */
5228 t = make_aggr_type (TYPENAME_TYPE);
5229 TYPE_CONTEXT (t) = FROB_CONTEXT (context);
5230 TYPENAME_TYPE_FULLNAME (t) = fullname;
5231 TREE_TYPE (t) = base_type;
5233 /* Build the corresponding TYPE_DECL. */
5234 d = build_decl (TYPE_DECL, name, t);
5235 TYPE_NAME (TREE_TYPE (d)) = d;
5236 TYPE_STUB_DECL (TREE_TYPE (d)) = d;
5237 DECL_CONTEXT (d) = FROB_CONTEXT (context);
5238 DECL_ARTIFICIAL (d) = 1;
5240 /* See if we already have this type. */
5241 e = hash_lookup (&ht, t, /*create=*/false, /*copy=*/0);
5245 /* Insert the type into the table. */
5246 hash_lookup (&ht, t, /*create=*/true, /*copy=*/0);
5251 /* Resolve `typename CONTEXT::NAME'. Returns an appropriate type,
5252 unless an error occurs, in which case error_mark_node is returned.
5253 If COMPLAIN zero, don't complain about any errors that occur. */
5256 make_typename_type (context, name, complain)
5262 if (TREE_CODE_CLASS (TREE_CODE (name)) == 't')
5264 if (!(TYPE_LANG_SPECIFIC (name)
5265 && (CLASSTYPE_IS_TEMPLATE (name)
5266 || CLASSTYPE_USE_TEMPLATE (name))))
5267 name = TYPE_IDENTIFIER (name);
5269 /* Create a TEMPLATE_ID_EXPR for the type. */
5270 name = build_nt (TEMPLATE_ID_EXPR,
5271 CLASSTYPE_TI_TEMPLATE (name),
5272 CLASSTYPE_TI_ARGS (name));
5274 else if (TREE_CODE (name) == TYPE_DECL)
5275 name = DECL_NAME (name);
5279 if (TREE_CODE (name) == TEMPLATE_ID_EXPR)
5281 name = TREE_OPERAND (name, 0);
5282 if (TREE_CODE (name) == TEMPLATE_DECL)
5283 name = TREE_OPERAND (fullname, 0) = DECL_NAME (name);
5285 if (TREE_CODE (name) != IDENTIFIER_NODE)
5286 my_friendly_abort (2000);
5288 if (TREE_CODE (context) == NAMESPACE_DECL)
5290 /* We can get here from typename_sub0 in the explicit_template_type
5291 expansion. Just fail. */
5293 cp_error ("no class template named `%#T' in `%#T'",
5295 return error_mark_node;
5298 if (! uses_template_parms (context)
5299 || currently_open_class (context))
5301 if (TREE_CODE (fullname) == TEMPLATE_ID_EXPR)
5303 tree tmpl = NULL_TREE;
5304 if (IS_AGGR_TYPE (context))
5305 tmpl = lookup_field (context, name, 0, 0);
5306 if (!tmpl || !DECL_CLASS_TEMPLATE_P (tmpl))
5309 cp_error ("no class template named `%#T' in `%#T'",
5311 return error_mark_node;
5314 return lookup_template_class (tmpl,
5315 TREE_OPERAND (fullname, 1),
5317 /*entering_scope=*/0);
5323 if (!IS_AGGR_TYPE (context))
5326 cp_error ("no type named `%#T' in `%#T'", name, context);
5327 return error_mark_node;
5330 t = lookup_field (context, name, 0, 1);
5332 return TREE_TYPE (t);
5336 /* If the CONTEXT is not a template type, then either the field is
5337 there now or its never going to be. */
5338 if (!uses_template_parms (context))
5341 cp_error ("no type named `%#T' in `%#T'", name, context);
5342 return error_mark_node;
5346 return build_typename_type (context, name, fullname, NULL_TREE);
5349 /* Select the right _DECL from multiple choices. */
5352 select_decl (binding, flags)
5357 val = BINDING_VALUE (binding);
5358 if (LOOKUP_NAMESPACES_ONLY (flags))
5360 /* We are not interested in types. */
5361 if (val && TREE_CODE (val) == NAMESPACE_DECL)
5366 /* If we could have a type and
5367 we have nothing or we need a type and have none. */
5368 if (BINDING_TYPE (binding)
5369 && (!val || ((flags & LOOKUP_PREFER_TYPES)
5370 && TREE_CODE (val) != TYPE_DECL)))
5371 val = TYPE_STUB_DECL (BINDING_TYPE (binding));
5372 /* Don't return non-types if we really prefer types. */
5373 else if (val && LOOKUP_TYPES_ONLY (flags) && TREE_CODE (val) != TYPE_DECL
5374 && (TREE_CODE (val) != TEMPLATE_DECL
5375 || !DECL_CLASS_TEMPLATE_P (val)))
5381 /* Unscoped lookup of a global: iterate over current namespaces,
5382 considering using-directives. If SPACESP is non-NULL, store a list
5383 of the namespaces we've considered in it. */
5386 unqualified_namespace_lookup (name, flags, spacesp)
5391 tree b = make_node (CPLUS_BINDING);
5392 tree initial = current_decl_namespace();
5393 tree scope = initial;
5395 struct binding_level *level;
5396 tree val = NULL_TREE;
5399 *spacesp = NULL_TREE;
5401 for (; !val; scope = CP_DECL_CONTEXT (scope))
5404 *spacesp = tree_cons (scope, NULL_TREE, *spacesp);
5405 val = binding_for_name (name, scope);
5407 /* Initialize binding for this context. */
5408 BINDING_VALUE (b) = BINDING_VALUE (val);
5409 BINDING_TYPE (b) = BINDING_TYPE (val);
5411 /* Add all _DECLs seen through local using-directives. */
5412 for (level = current_binding_level;
5413 !level->namespace_p;
5414 level = level->level_chain)
5415 if (!lookup_using_namespace (name, b, level->using_directives,
5416 scope, flags, spacesp))
5417 /* Give up because of error. */
5418 return error_mark_node;
5420 /* Add all _DECLs seen through global using-directives. */
5421 /* XXX local and global using lists should work equally. */
5425 if (!lookup_using_namespace (name, b, DECL_NAMESPACE_USING (siter),
5426 scope, flags, spacesp))
5427 /* Give up because of error. */
5428 return error_mark_node;
5429 if (siter == scope) break;
5430 siter = CP_DECL_CONTEXT (siter);
5433 val = select_decl (b, flags);
5434 if (scope == global_namespace)
5440 /* Combine prefer_type and namespaces_only into flags. */
5443 lookup_flags (prefer_type, namespaces_only)
5444 int prefer_type, namespaces_only;
5446 if (namespaces_only)
5447 return LOOKUP_PREFER_NAMESPACES;
5448 if (prefer_type > 1)
5449 return LOOKUP_PREFER_TYPES;
5450 if (prefer_type > 0)
5451 return LOOKUP_PREFER_BOTH;
5455 /* Given a lookup that returned VAL, use FLAGS to decide if we want to
5456 ignore it or not. Subroutine of lookup_name_real. */
5459 qualify_lookup (val, flags)
5463 if (val == NULL_TREE)
5465 if ((flags & LOOKUP_PREFER_NAMESPACES) && TREE_CODE (val) == NAMESPACE_DECL)
5467 if ((flags & LOOKUP_PREFER_TYPES)
5468 && (TREE_CODE (val) == TYPE_DECL
5469 || ((flags & LOOKUP_TEMPLATES_EXPECTED)
5470 && DECL_CLASS_TEMPLATE_P (val))))
5472 if (flags & (LOOKUP_PREFER_NAMESPACES | LOOKUP_PREFER_TYPES))
5477 /* Any other BINDING overrides an implicit TYPENAME. Warn about
5481 warn_about_implicit_typename_lookup (typename, binding)
5485 tree subtype = TREE_TYPE (TREE_TYPE (typename));
5486 tree name = DECL_NAME (typename);
5488 if (! (TREE_CODE (binding) == TEMPLATE_DECL
5489 && CLASSTYPE_TEMPLATE_INFO (subtype)
5490 && CLASSTYPE_TI_TEMPLATE (subtype) == binding)
5491 && ! (TREE_CODE (binding) == TYPE_DECL
5492 && same_type_p (TREE_TYPE (binding), subtype)))
5494 cp_warning ("lookup of `%D' finds `%#D'",
5496 cp_warning (" instead of `%D' from dependent base class",
5498 cp_warning (" (use `typename %T::%D' if that's what you meant)",
5499 constructor_name (current_class_type), name);
5503 /* Look up NAME in the current binding level and its superiors in the
5504 namespace of variables, functions and typedefs. Return a ..._DECL
5505 node of some kind representing its definition if there is only one
5506 such declaration, or return a TREE_LIST with all the overloaded
5507 definitions if there are many, or return 0 if it is undefined.
5509 If PREFER_TYPE is > 0, we prefer TYPE_DECLs or namespaces.
5510 If PREFER_TYPE is > 1, we reject non-type decls (e.g. namespaces).
5511 If PREFER_TYPE is -2, we're being called from yylex(). (UGLY)
5512 Otherwise we prefer non-TYPE_DECLs.
5514 If NONCLASS is non-zero, we don't look for the NAME in class scope,
5515 using IDENTIFIER_CLASS_VALUE. */
5518 lookup_name_real (name, prefer_type, nonclass, namespaces_only)
5520 int prefer_type, nonclass, namespaces_only;
5523 tree val = NULL_TREE;
5525 tree from_obj = NULL_TREE;
5527 int val_is_implicit_typename = 0;
5529 /* Hack: copy flag set by parser, if set. */
5530 if (only_namespace_names)
5531 namespaces_only = 1;
5533 if (prefer_type == -2)
5535 extern int looking_for_typename;
5536 tree type = NULL_TREE;
5539 prefer_type = looking_for_typename;
5541 flags = lookup_flags (prefer_type, namespaces_only);
5542 /* If the next thing is '<', class templates are types. */
5543 if (looking_for_template)
5544 flags |= LOOKUP_TEMPLATES_EXPECTED;
5546 /* std:: becomes :: for now. */
5547 if (got_scope == std_node)
5548 got_scope = void_type_node;
5552 else if (got_object != error_mark_node)
5557 if (type == error_mark_node)
5558 return error_mark_node;
5559 if (TREE_CODE (type) == TYPENAME_TYPE && TREE_TYPE (type))
5560 type = TREE_TYPE (type);
5563 type = complete_type (type);
5565 if (TREE_CODE (type) == VOID_TYPE)
5566 type = global_namespace;
5567 if (TREE_CODE (type) == NAMESPACE_DECL)
5569 val = make_node (CPLUS_BINDING);
5570 flags |= LOOKUP_COMPLAIN;
5571 if (!qualified_lookup_using_namespace (name, type, val, flags))
5573 val = select_decl (val, flags);
5575 else if (! IS_AGGR_TYPE (type)
5576 || TREE_CODE (type) == TEMPLATE_TYPE_PARM
5577 || TREE_CODE (type) == TEMPLATE_TEMPLATE_PARM
5578 || TREE_CODE (type) == TYPENAME_TYPE)
5579 /* Someone else will give an error about this if needed. */
5581 else if (type == current_class_type)
5582 val = IDENTIFIER_CLASS_VALUE (name);
5584 val = lookup_member (type, name, 0, prefer_type);
5591 else if (got_object && val)
5596 flags = lookup_flags (prefer_type, namespaces_only);
5597 /* If we're not parsing, we need to complain. */
5598 flags |= LOOKUP_COMPLAIN;
5601 /* First, look in non-namespace scopes. */
5603 if (current_class_type == NULL_TREE)
5606 for (t = IDENTIFIER_BINDING (name); t; t = TREE_CHAIN (t))
5610 if (!LOCAL_BINDING_P (t) && nonclass)
5611 /* We're not looking for class-scoped bindings, so keep going. */
5614 /* If this is the kind of thing we're looking for, we're done. */
5615 if (qualify_lookup (BINDING_VALUE (t), flags))
5616 binding = BINDING_VALUE (t);
5617 else if ((flags & LOOKUP_PREFER_TYPES)
5618 && qualify_lookup (BINDING_TYPE (t), flags))
5619 binding = BINDING_TYPE (t);
5621 binding = NULL_TREE;
5624 && (!val || !IMPLICIT_TYPENAME_TYPE_DECL_P (binding)))
5626 if (val_is_implicit_typename && !yylex)
5627 warn_about_implicit_typename_lookup (val, binding);
5629 val_is_implicit_typename
5630 = IMPLICIT_TYPENAME_TYPE_DECL_P (val);
5631 if (!val_is_implicit_typename)
5636 /* Now lookup in namespace scopes. */
5637 if (!val || val_is_implicit_typename)
5639 t = unqualified_namespace_lookup (name, flags, 0);
5642 if (val_is_implicit_typename && !yylex)
5643 warn_about_implicit_typename_lookup (val, t);
5651 /* This should only warn about types used in qualified-ids. */
5652 if (from_obj && from_obj != val)
5654 if (looking_for_typename && TREE_CODE (from_obj) == TYPE_DECL
5655 && TREE_CODE (val) == TYPE_DECL
5656 && TREE_TYPE (from_obj) != TREE_TYPE (val))
5658 cp_pedwarn ("lookup of `%D' in the scope of `%#T' (`%#T')",
5659 name, got_object, TREE_TYPE (from_obj));
5660 cp_pedwarn (" does not match lookup in the current scope (`%#T')",
5664 /* We don't change val to from_obj if got_object depends on
5665 template parms because that breaks implicit typename for
5666 destructor calls. */
5667 if (! uses_template_parms (got_object))
5671 /* If we have a single function from a using decl, pull it out. */
5672 if (TREE_CODE (val) == OVERLOAD && ! really_overloaded_fn (val))
5673 val = OVL_FUNCTION (val);
5682 lookup_name_nonclass (name)
5685 return lookup_name_real (name, 0, 1, 0);
5689 lookup_function_nonclass (name, args)
5693 return lookup_arg_dependent (name, lookup_name_nonclass (name), args);
5697 lookup_name_namespace_only (name)
5700 /* type-or-namespace, nonclass, namespace_only */
5701 return lookup_name_real (name, 1, 1, 1);
5705 lookup_name (name, prefer_type)
5709 return lookup_name_real (name, prefer_type, 0, 0);
5712 /* Similar to `lookup_name' but look only in the innermost non-class
5716 lookup_name_current_level (name)
5719 struct binding_level *b;
5722 b = current_binding_level;
5723 while (b->parm_flag == 2)
5728 t = IDENTIFIER_NAMESPACE_VALUE (name);
5730 /* extern "C" function() */
5731 if (t != NULL_TREE && TREE_CODE (t) == TREE_LIST)
5734 else if (IDENTIFIER_BINDING (name)
5735 && LOCAL_BINDING_P (IDENTIFIER_BINDING (name)))
5739 if (BINDING_LEVEL (IDENTIFIER_BINDING (name)) == b)
5740 return IDENTIFIER_VALUE (name);
5752 /* Like lookup_name_current_level, but for types. */
5755 lookup_type_current_level (name)
5758 register tree t = NULL_TREE;
5760 my_friendly_assert (! current_binding_level->namespace_p, 980716);
5762 if (REAL_IDENTIFIER_TYPE_VALUE (name) != NULL_TREE
5763 && REAL_IDENTIFIER_TYPE_VALUE (name) != global_type_node)
5765 struct binding_level *b = current_binding_level;
5768 if (purpose_member (name, b->type_shadowed))
5769 return REAL_IDENTIFIER_TYPE_VALUE (name);
5781 begin_only_namespace_names ()
5783 only_namespace_names = 1;
5787 end_only_namespace_names ()
5789 only_namespace_names = 0;
5792 /* Arrange for the user to get a source line number, even when the
5793 compiler is going down in flames, so that she at least has a
5794 chance of working around problems in the compiler. We used to
5795 call error(), but that let the segmentation fault continue
5796 through; now, it's much more passive by asking them to send the
5797 maintainers mail about the problem. */
5801 int sig ATTRIBUTE_UNUSED;
5803 signal (SIGSEGV, SIG_DFL);
5805 signal (SIGIOT, SIG_DFL);
5808 signal (SIGILL, SIG_DFL);
5811 signal (SIGABRT, SIG_DFL);
5814 signal (SIGBUS, SIG_DFL);
5816 my_friendly_abort (0);
5819 /* Push the declarations of builtin types into the namespace.
5820 RID_INDEX, if < RID_MAX is the index of the builtin type
5821 in the array RID_POINTERS. NAME is the name used when looking
5822 up the builtin type. TYPE is the _TYPE node for the builtin type. */
5825 record_builtin_type (rid_index, name, type)
5830 tree rname = NULL_TREE, tname = NULL_TREE;
5831 tree tdecl = NULL_TREE;
5833 if ((int) rid_index < (int) RID_MAX)
5834 rname = ridpointers[(int) rid_index];
5836 tname = get_identifier (name);
5838 TYPE_BUILT_IN (type) = 1;
5842 tdecl = pushdecl (build_decl (TYPE_DECL, tname, type));
5843 set_identifier_type_value (tname, NULL_TREE);
5844 if ((int) rid_index < (int) RID_MAX)
5845 /* Built-in types live in the global namespace. */
5846 SET_IDENTIFIER_GLOBAL_VALUE (tname, tdecl);
5848 if (rname != NULL_TREE)
5850 if (tname != NULL_TREE)
5852 set_identifier_type_value (rname, NULL_TREE);
5853 SET_IDENTIFIER_GLOBAL_VALUE (rname, tdecl);
5857 tdecl = pushdecl (build_decl (TYPE_DECL, rname, type));
5858 set_identifier_type_value (rname, NULL_TREE);
5863 /* Record one of the standard Java types.
5864 * Declare it as having the given NAME.
5865 * If SIZE > 0, it is the size of one of the integral types;
5866 * otherwise it is the negative of the size of one of the other types. */
5869 record_builtin_java_type (name, size)
5875 type = make_signed_type (size);
5876 else if (size > -32)
5877 { /* "__java_char" or ""__java_boolean". */
5878 type = make_unsigned_type (-size);
5879 /*if (size == -1) TREE_SET_CODE (type, BOOLEAN_TYPE);*/
5882 { /* "__java_float" or ""__java_double". */
5883 type = make_node (REAL_TYPE);
5884 TYPE_PRECISION (type) = - size;
5887 record_builtin_type (RID_MAX, name, type);
5888 decl = TYPE_NAME (type);
5890 /* Suppress generate debug symbol entries for these types,
5891 since for normal C++ they are just clutter.
5892 However, push_lang_context undoes this if extern "Java" is seen. */
5893 DECL_IGNORED_P (decl) = 1;
5895 TYPE_FOR_JAVA (type) = 1;
5899 /* Push a type into the namespace so that the back-ends ignore it. */
5902 record_unknown_type (type, name)
5906 tree decl = pushdecl (build_decl (TYPE_DECL, get_identifier (name), type));
5907 /* Make sure the "unknown type" typedecl gets ignored for debug info. */
5908 DECL_IGNORED_P (decl) = 1;
5909 TYPE_DECL_SUPPRESS_DEBUG (decl) = 1;
5910 TYPE_SIZE (type) = TYPE_SIZE (void_type_node);
5911 TYPE_ALIGN (type) = 1;
5912 TYPE_MODE (type) = TYPE_MODE (void_type_node);
5915 /* Push overloaded decl, in global scope, with one argument so it
5916 can be used as a callback from define_function. */
5919 push_overloaded_decl_1 (x)
5926 auto_function (name, type)
5929 return define_function
5930 (IDENTIFIER_POINTER (name), type, push_overloaded_decl_1,
5931 IDENTIFIER_POINTER (build_decl_overload (name, TYPE_ARG_TYPES (type),
5935 /* Create the predefined scalar types of C,
5936 and some nodes representing standard constants (0, 1, (void *)0).
5937 Initialize the global binding level.
5938 Make definitions for built-in primitive functions. */
5941 init_decl_processing ()
5944 int wchar_type_size;
5945 tree array_domain_type;
5947 /* Have to make these distinct before we try using them. */
5948 lang_name_cplusplus = get_identifier ("C++");
5949 lang_name_c = get_identifier ("C");
5950 lang_name_java = get_identifier ("Java");
5952 /* Let the back-end now how to save and restore language-specific
5953 per-function globals. */
5954 init_lang_status = &push_cp_function_context;
5955 free_lang_status = &pop_cp_function_context;
5956 mark_lang_status = &mark_cp_function_context;
5962 /* Create the global variables. */
5963 push_to_top_level ();
5965 /* Enter the global namespace. */
5966 my_friendly_assert (global_namespace == NULL_TREE, 375);
5967 push_namespace (get_identifier ("::"));
5968 global_namespace = current_namespace;
5969 current_lang_name = NULL_TREE;
5971 /* Adjust various flags based on command-line settings. */
5972 if (flag_strict_prototype == 2)
5973 flag_strict_prototype = pedantic;
5974 if (! flag_permissive && ! pedantic)
5975 flag_pedantic_errors = 1;
5976 if (!flag_no_inline)
5977 flag_inline_trees = 1;
5979 strict_prototypes_lang_c = flag_strict_prototype;
5982 current_lang_name = lang_name_c;
5984 current_function_decl = NULL_TREE;
5985 current_binding_level = NULL_BINDING_LEVEL;
5986 free_binding_level = NULL_BINDING_LEVEL;
5988 /* Because most segmentation signals can be traced back into user
5989 code, catch them and at least give the user a chance of working
5990 around compiler bugs. */
5991 signal (SIGSEGV, signal_catch);
5993 /* We will also catch aborts in the back-end through signal_catch and
5994 give the user a chance to see where the error might be, and to defeat
5995 aborts in the back-end when there have been errors previously in their
5998 signal (SIGIOT, signal_catch);
6001 signal (SIGILL, signal_catch);
6004 signal (SIGABRT, signal_catch);
6007 signal (SIGBUS, signal_catch);
6010 build_common_tree_nodes (flag_signed_char);
6012 error_mark_list = build_tree_list (error_mark_node, error_mark_node);
6013 TREE_TYPE (error_mark_list) = error_mark_node;
6015 /* Make the binding_level structure for global names. */
6017 global_binding_level = current_binding_level;
6018 /* The global level is the namespace level of ::. */
6019 NAMESPACE_LEVEL (global_namespace) = global_binding_level;
6020 declare_namespace_level ();
6022 this_identifier = get_identifier (THIS_NAME);
6023 in_charge_identifier = get_identifier (IN_CHARGE_NAME);
6024 ctor_identifier = get_identifier (CTOR_NAME);
6025 dtor_identifier = get_identifier (DTOR_NAME);
6026 pfn_identifier = get_identifier (VTABLE_PFN_NAME);
6027 index_identifier = get_identifier (VTABLE_INDEX_NAME);
6028 delta_identifier = get_identifier (VTABLE_DELTA_NAME);
6029 delta2_identifier = get_identifier (VTABLE_DELTA2_NAME);
6030 pfn_or_delta2_identifier = get_identifier ("__pfn_or_delta2");
6032 /* Define `int' and `char' first so that dbx will output them first. */
6033 record_builtin_type (RID_INT, NULL_PTR, integer_type_node);
6034 record_builtin_type (RID_CHAR, "char", char_type_node);
6036 /* `signed' is the same as `int' */
6037 record_builtin_type (RID_SIGNED, NULL_PTR, integer_type_node);
6038 record_builtin_type (RID_LONG, "long int", long_integer_type_node);
6039 record_builtin_type (RID_UNSIGNED, "unsigned int", unsigned_type_node);
6040 record_builtin_type (RID_MAX, "long unsigned int", long_unsigned_type_node);
6041 record_builtin_type (RID_MAX, "unsigned long", long_unsigned_type_node);
6042 record_builtin_type (RID_MAX, "long long int", long_long_integer_type_node);
6043 record_builtin_type (RID_MAX, "long long unsigned int",
6044 long_long_unsigned_type_node);
6045 record_builtin_type (RID_MAX, "long long unsigned",
6046 long_long_unsigned_type_node);
6047 record_builtin_type (RID_SHORT, "short int", short_integer_type_node);
6048 record_builtin_type (RID_MAX, "short unsigned int", short_unsigned_type_node);
6049 record_builtin_type (RID_MAX, "unsigned short", short_unsigned_type_node);
6052 = TREE_TYPE (IDENTIFIER_GLOBAL_VALUE (get_identifier (PTRDIFF_TYPE)));
6054 /* Define both `signed char' and `unsigned char'. */
6055 record_builtin_type (RID_MAX, "signed char", signed_char_type_node);
6056 record_builtin_type (RID_MAX, "unsigned char", unsigned_char_type_node);
6058 /* `unsigned long' is the standard type for sizeof.
6059 Note that stddef.h uses `unsigned long',
6060 and this must agree, even if long and int are the same size. */
6062 (TREE_TYPE (IDENTIFIER_GLOBAL_VALUE (get_identifier (SIZE_TYPE))));
6064 /* Create the widest literal types. */
6065 widest_integer_literal_type_node = make_signed_type (HOST_BITS_PER_WIDE_INT * 2);
6066 pushdecl (build_decl (TYPE_DECL, NULL_TREE,
6067 widest_integer_literal_type_node));
6069 widest_unsigned_literal_type_node = make_unsigned_type (HOST_BITS_PER_WIDE_INT * 2);
6070 pushdecl (build_decl (TYPE_DECL, NULL_TREE,
6071 widest_unsigned_literal_type_node));
6073 /* These are types that type_for_size and type_for_mode use. */
6074 pushdecl (build_decl (TYPE_DECL, NULL_TREE, intQI_type_node));
6075 pushdecl (build_decl (TYPE_DECL, NULL_TREE, intHI_type_node));
6076 pushdecl (build_decl (TYPE_DECL, NULL_TREE, intSI_type_node));
6077 pushdecl (build_decl (TYPE_DECL, NULL_TREE, intDI_type_node));
6078 #if HOST_BITS_PER_WIDE_INT >= 64
6079 pushdecl (build_decl (TYPE_DECL, get_identifier ("__int128_t"), intTI_type_node));
6081 pushdecl (build_decl (TYPE_DECL, NULL_TREE, unsigned_intQI_type_node));
6082 pushdecl (build_decl (TYPE_DECL, NULL_TREE, unsigned_intHI_type_node));
6083 pushdecl (build_decl (TYPE_DECL, NULL_TREE, unsigned_intSI_type_node));
6084 pushdecl (build_decl (TYPE_DECL, NULL_TREE, unsigned_intDI_type_node));
6085 #if HOST_BITS_PER_WIDE_INT >= 64
6086 pushdecl (build_decl (TYPE_DECL, get_identifier ("__uint128_t"), unsigned_intTI_type_node));
6089 build_common_tree_nodes_2 (flag_short_double);
6091 java_byte_type_node = record_builtin_java_type ("__java_byte", 8);
6092 java_short_type_node = record_builtin_java_type ("__java_short", 16);
6093 java_int_type_node = record_builtin_java_type ("__java_int", 32);
6094 java_long_type_node = record_builtin_java_type ("__java_long", 64);
6095 java_float_type_node = record_builtin_java_type ("__java_float", -32);
6096 java_double_type_node = record_builtin_java_type ("__java_double", -64);
6097 java_char_type_node = record_builtin_java_type ("__java_char", -16);
6098 java_boolean_type_node = record_builtin_java_type ("__java_boolean", -1);
6100 integer_two_node = build_int_2 (2, 0);
6101 TREE_TYPE (integer_two_node) = integer_type_node;
6102 integer_three_node = build_int_2 (3, 0);
6103 TREE_TYPE (integer_three_node) = integer_type_node;
6105 boolean_type_node = make_unsigned_type (BOOL_TYPE_SIZE);
6106 TREE_SET_CODE (boolean_type_node, BOOLEAN_TYPE);
6107 TYPE_MAX_VALUE (boolean_type_node) = build_int_2 (1, 0);
6108 TREE_TYPE (TYPE_MAX_VALUE (boolean_type_node)) = boolean_type_node;
6109 TYPE_PRECISION (boolean_type_node) = 1;
6110 record_builtin_type (RID_BOOL, "bool", boolean_type_node);
6111 boolean_false_node = build_int_2 (0, 0);
6112 TREE_TYPE (boolean_false_node) = boolean_type_node;
6113 boolean_true_node = build_int_2 (1, 0);
6114 TREE_TYPE (boolean_true_node) = boolean_type_node;
6116 signed_size_zero_node = build_int_2 (0, 0); record_builtin_type (RID_FLOAT, NULL_PTR, float_type_node);
6117 record_builtin_type (RID_DOUBLE, NULL_PTR, double_type_node);
6118 record_builtin_type (RID_MAX, "long double", long_double_type_node);
6120 pushdecl (build_decl (TYPE_DECL, get_identifier ("complex int"),
6121 complex_integer_type_node));
6122 pushdecl (build_decl (TYPE_DECL, get_identifier ("complex float"),
6123 complex_float_type_node));
6124 pushdecl (build_decl (TYPE_DECL, get_identifier ("complex double"),
6125 complex_double_type_node));
6126 pushdecl (build_decl (TYPE_DECL, get_identifier ("complex long double"),
6127 complex_long_double_type_node));
6129 TREE_TYPE (signed_size_zero_node) = make_signed_type (TYPE_PRECISION (sizetype));
6131 record_builtin_type (RID_VOID, NULL_PTR, void_type_node);
6132 void_list_node = build_tree_list (NULL_TREE, void_type_node);
6133 TREE_PARMLIST (void_list_node) = 1;
6135 /* Used for expressions that do nothing, but are not errors. */
6136 void_zero_node = build_int_2 (0, 0);
6137 TREE_TYPE (void_zero_node) = void_type_node;
6139 string_type_node = build_pointer_type (char_type_node);
6140 const_string_type_node
6141 = build_pointer_type (build_qualified_type (char_type_node,
6143 empty_except_spec = build_tree_list (NULL_TREE, NULL_TREE);
6145 record_builtin_type (RID_MAX, NULL_PTR, string_type_node);
6148 /* Make a type to be the domain of a few array types
6149 whose domains don't really matter.
6150 200 is small enough that it always fits in size_t
6151 and large enough that it can hold most function names for the
6152 initializations of __FUNCTION__ and __PRETTY_FUNCTION__. */
6153 array_domain_type = build_index_type (build_int_2 (200, 0));
6155 /* Make a type for arrays of characters.
6156 With luck nothing will ever really depend on the length of this
6158 char_array_type_node
6159 = build_array_type (char_type_node, array_domain_type);
6160 /* Likewise for arrays of ints. */
6162 = build_array_type (integer_type_node, array_domain_type);
6164 /* This is just some anonymous class type. Nobody should ever
6165 need to look inside this envelope. */
6166 class_star_type_node = build_pointer_type (make_aggr_type (RECORD_TYPE));
6168 if (flag_huge_objects)
6169 delta_type_node = long_integer_type_node;
6171 delta_type_node = short_integer_type_node;
6173 default_function_type
6174 = build_function_type (integer_type_node, NULL_TREE);
6176 ptr_type_node = build_pointer_type (void_type_node);
6178 = build_pointer_type (build_qualified_type (void_type_node,
6180 c_common_nodes_and_builtins (1, flag_no_builtin, flag_no_nonansi_builtin);
6181 lang_type_promotes_to = convert_type_from_ellipsis;
6184 = build_exception_variant (void_ftype_ptr, empty_except_spec);
6186 /* C++ extensions */
6188 unknown_type_node = make_node (UNKNOWN_TYPE);
6189 record_unknown_type (unknown_type_node, "unknown type");
6191 /* Indirecting an UNKNOWN_TYPE node yields an UNKNOWN_TYPE node. */
6192 TREE_TYPE (unknown_type_node) = unknown_type_node;
6194 TREE_TYPE (null_node) = type_for_size (POINTER_SIZE, 0);
6196 /* Looking up TYPE_POINTER_TO and TYPE_REFERENCE_TO yield the same
6198 TYPE_POINTER_TO (unknown_type_node) = unknown_type_node;
6199 TYPE_REFERENCE_TO (unknown_type_node) = unknown_type_node;
6201 /* This is special for C++ so functions can be overloaded. */
6202 wchar_type_node = get_identifier (flag_short_wchar
6203 ? "short unsigned int"
6205 wchar_type_node = TREE_TYPE (IDENTIFIER_GLOBAL_VALUE (wchar_type_node));
6206 wchar_type_size = TYPE_PRECISION (wchar_type_node);
6207 signed_wchar_type_node = make_signed_type (wchar_type_size);
6208 unsigned_wchar_type_node = make_unsigned_type (wchar_type_size);
6210 = TREE_UNSIGNED (wchar_type_node)
6211 ? unsigned_wchar_type_node
6212 : signed_wchar_type_node;
6213 record_builtin_type (RID_WCHAR, "__wchar_t", wchar_type_node);
6215 /* Artificial declaration of wchar_t -- can be bashed */
6216 wchar_decl_node = build_decl (TYPE_DECL, get_identifier ("wchar_t"),
6218 pushdecl (wchar_decl_node);
6220 /* This is for wide string constants. */
6221 wchar_array_type_node
6222 = build_array_type (wchar_type_node, array_domain_type);
6224 if (flag_vtable_thunks)
6226 /* Make sure we get a unique function type, so we can give
6227 its pointer type a name. (This wins for gdb.) */
6228 tree vfunc_type = make_node (FUNCTION_TYPE);
6229 TREE_TYPE (vfunc_type) = integer_type_node;
6230 TYPE_ARG_TYPES (vfunc_type) = NULL_TREE;
6231 layout_type (vfunc_type);
6233 vtable_entry_type = build_pointer_type (vfunc_type);
6237 vtable_entry_type = make_aggr_type (RECORD_TYPE);
6238 fields[0] = build_lang_decl (FIELD_DECL, delta_identifier,
6240 fields[1] = build_lang_decl (FIELD_DECL, index_identifier,
6242 fields[2] = build_lang_decl (FIELD_DECL, pfn_identifier,
6244 finish_builtin_type (vtable_entry_type, VTBL_PTR_TYPE, fields, 2,
6247 /* Make this part of an invisible union. */
6248 fields[3] = copy_node (fields[2]);
6249 TREE_TYPE (fields[3]) = delta_type_node;
6250 DECL_NAME (fields[3]) = delta2_identifier;
6251 DECL_MODE (fields[3]) = TYPE_MODE (delta_type_node);
6252 DECL_SIZE (fields[3]) = TYPE_SIZE (delta_type_node);
6253 TREE_UNSIGNED (fields[3]) = 0;
6254 TREE_CHAIN (fields[2]) = fields[3];
6255 vtable_entry_type = build_qualified_type (vtable_entry_type,
6258 record_builtin_type (RID_MAX, VTBL_PTR_TYPE, vtable_entry_type);
6261 = build_cplus_array_type (vtable_entry_type, NULL_TREE);
6262 layout_type (vtbl_type_node);
6263 vtbl_type_node = build_qualified_type (vtbl_type_node, TYPE_QUAL_CONST);
6264 record_builtin_type (RID_MAX, NULL_PTR, vtbl_type_node);
6265 vtbl_ptr_type_node = build_pointer_type (vtable_entry_type);
6266 layout_type (vtbl_ptr_type_node);
6267 record_builtin_type (RID_MAX, NULL_PTR, vtbl_ptr_type_node);
6269 std_node = build_decl (NAMESPACE_DECL,
6270 get_identifier (flag_honor_std ? "fake std":"std"),
6272 pushdecl (std_node);
6274 global_type_node = make_node (LANG_TYPE);
6275 record_unknown_type (global_type_node, "global type");
6278 current_lang_name = lang_name_cplusplus;
6281 tree bad_alloc_type_node, newtype, deltype;
6283 push_namespace (get_identifier ("std"));
6284 bad_alloc_type_node = xref_tag
6285 (class_type_node, get_identifier ("bad_alloc"), 1);
6288 newtype = build_exception_variant
6289 (ptr_ftype_sizetype, add_exception_specifier (NULL_TREE, bad_alloc_type_node, -1));
6290 deltype = build_exception_variant (void_ftype_ptr, empty_except_spec);
6291 auto_function (ansi_opname[(int) NEW_EXPR], newtype);
6292 auto_function (ansi_opname[(int) VEC_NEW_EXPR], newtype);
6293 global_delete_fndecl = auto_function (ansi_opname[(int) DELETE_EXPR],
6295 auto_function (ansi_opname[(int) VEC_DELETE_EXPR], deltype);
6299 = define_function ("__pure_virtual", void_ftype, 0, 0);
6301 /* Perform other language dependent initializations. */
6302 init_class_processing ();
6303 init_init_processing ();
6304 init_search_processing ();
6305 init_rtti_processing ();
6307 if (flag_exceptions)
6308 init_exception_processing ();
6311 flag_inline_functions = 0;
6314 if (! supports_one_only ())
6317 /* Create the global bindings for __FUNCTION__ and __PRETTY_FUNCTION__. */
6318 declare_function_name ();
6320 /* Prepare to check format strings against argument lists. */
6321 init_function_format_info ();
6323 /* Show we use EH for cleanups. */
6324 using_eh_for_cleanups ();
6326 print_error_function = lang_print_error_function;
6327 lang_get_alias_set = &c_get_alias_set;
6328 valid_lang_attribute = cp_valid_lang_attribute;
6330 /* Maintain consistency. Perhaps we should just complain if they
6331 say -fwritable-strings? */
6332 if (flag_writable_strings)
6333 flag_const_strings = 0;
6335 /* Add GC roots for all of our global variables. */
6336 ggc_add_tree_root (c_global_trees, sizeof c_global_trees / sizeof(tree));
6337 ggc_add_tree_root (cp_global_trees, sizeof cp_global_trees / sizeof(tree));
6338 ggc_add_tree_root (&integer_three_node, 1);
6339 ggc_add_tree_root (&integer_two_node, 1);
6340 ggc_add_tree_root (&signed_size_zero_node, 1);
6341 ggc_add_tree_root (&size_one_node, 1);
6342 ggc_add_tree_root (&size_zero_node, 1);
6343 ggc_add_root (&global_binding_level, 1, sizeof global_binding_level,
6344 mark_binding_level);
6345 ggc_add_root (&scope_chain, 1, sizeof scope_chain, &mark_saved_scope);
6346 ggc_add_tree_root (&static_ctors, 1);
6347 ggc_add_tree_root (&static_dtors, 1);
6348 ggc_add_tree_root (&lastiddecl, 1);
6350 ggc_add_tree_root (&last_function_parm_tags, 1);
6351 ggc_add_tree_root (¤t_function_return_value, 1);
6352 ggc_add_tree_root (¤t_function_parms, 1);
6353 ggc_add_tree_root (¤t_function_parm_tags, 1);
6354 ggc_add_tree_root (&last_function_parms, 1);
6355 ggc_add_tree_root (&error_mark_list, 1);
6357 ggc_add_tree_root (&global_namespace, 1);
6358 ggc_add_tree_root (&global_type_node, 1);
6359 ggc_add_tree_root (&anonymous_namespace_name, 1);
6361 ggc_add_tree_root (&got_object, 1);
6362 ggc_add_tree_root (&got_scope, 1);
6364 ggc_add_tree_root (¤t_lang_name, 1);
6365 ggc_add_tree_root (&static_aggregates, 1);
6368 /* Function to print any language-specific context for an error message. */
6371 lang_print_error_function (file)
6374 default_print_error_function (file);
6375 maybe_print_template_context ();
6378 /* Make a definition for a builtin function named NAME and whose data type
6379 is TYPE. TYPE should be a function type with argument types.
6381 If LIBRARY_NAME is nonzero, use that for DECL_ASSEMBLER_NAME,
6382 the name to be called if we can't opencode the function. */
6385 define_function (name, type, pfn, library_name)
6388 void (*pfn) PROTO((tree));
6389 const char *library_name;
6391 tree decl = build_lang_decl (FUNCTION_DECL, get_identifier (name), type);
6392 DECL_EXTERNAL (decl) = 1;
6393 TREE_PUBLIC (decl) = 1;
6394 DECL_ARTIFICIAL (decl) = 1;
6396 my_friendly_assert (DECL_CONTEXT (decl) == NULL_TREE, 392);
6397 DECL_CONTEXT (decl) = FROB_CONTEXT (current_namespace);
6399 /* Since `pushdecl' relies on DECL_ASSEMBLER_NAME instead of DECL_NAME,
6400 we cannot change DECL_ASSEMBLER_NAME until we have installed this
6401 function in the namespace. */
6402 if (pfn) (*pfn) (decl);
6404 DECL_ASSEMBLER_NAME (decl) = get_identifier (library_name);
6405 make_function_rtl (decl);
6410 /* Wrapper around define_function, for the benefit of
6411 c_common_nodes_and_builtins.
6412 FUNCTION_CODE tells later passes how to compile calls to this function.
6413 See tree.h for its possible values. */
6416 builtin_function (name, type, code, class, libname)
6420 enum built_in_class class;
6421 const char *libname;
6423 tree decl = define_function (name, type, (void (*) PROTO((tree)))pushdecl,
6425 DECL_BUILT_IN_CLASS (decl) = class;
6426 DECL_FUNCTION_CODE (decl) = code;
6430 /* When we call finish_struct for an anonymous union, we create
6431 default copy constructors and such. But, an anonymous union
6432 shouldn't have such things; this function undoes the damage to the
6433 anonymous union type T.
6435 (The reason that we create the synthesized methods is that we don't
6436 distinguish `union { int i; }' from `typedef union { int i; } U'.
6437 The first is an anonymous union; the second is just an ordinary
6441 fixup_anonymous_aggr (t)
6446 /* Wipe out memory of synthesized methods */
6447 TYPE_HAS_CONSTRUCTOR (t) = 0;
6448 TYPE_HAS_DEFAULT_CONSTRUCTOR (t) = 0;
6449 TYPE_HAS_INIT_REF (t) = 0;
6450 TYPE_HAS_CONST_INIT_REF (t) = 0;
6451 TYPE_HAS_ASSIGN_REF (t) = 0;
6452 TYPE_HAS_CONST_ASSIGN_REF (t) = 0;
6454 /* Splice the implicitly generated functions out of the TYPE_METHODS
6456 q = &TYPE_METHODS (t);
6459 if (DECL_ARTIFICIAL (*q))
6460 *q = TREE_CHAIN (*q);
6462 q = &TREE_CHAIN (*q);
6465 /* ANSI C++ June 5 1992 WP 9.5.3. Anonymous unions may not have
6466 function members. */
6467 if (TYPE_METHODS (t))
6468 error ("an anonymous union cannot have function members");
6471 /* Make sure that a declaration with no declarator is well-formed, i.e.
6472 just defines a tagged type or anonymous union.
6474 Returns the type defined, if any. */
6477 check_tag_decl (declspecs)
6481 tree ob_modifier = NULL_TREE;
6483 register tree t = NULL_TREE;
6485 for (link = declspecs; link; link = TREE_CHAIN (link))
6487 register tree value = TREE_VALUE (link);
6493 if (IS_AGGR_TYPE (value) || TREE_CODE (value) == ENUMERAL_TYPE)
6495 my_friendly_assert (TYPE_MAIN_DECL (value) != NULL_TREE, 261);
6499 else if (value == ridpointers[(int) RID_FRIEND])
6501 if (current_class_type == NULL_TREE
6502 || current_scope () != current_class_type)
6503 ob_modifier = value;
6505 else if (value == ridpointers[(int) RID_STATIC]
6506 || value == ridpointers[(int) RID_EXTERN]
6507 || value == ridpointers[(int) RID_AUTO]
6508 || value == ridpointers[(int) RID_REGISTER]
6509 || value == ridpointers[(int) RID_INLINE]
6510 || value == ridpointers[(int) RID_VIRTUAL]
6511 || value == ridpointers[(int) RID_CONST]
6512 || value == ridpointers[(int) RID_VOLATILE]
6513 || value == ridpointers[(int) RID_EXPLICIT])
6514 ob_modifier = value;
6518 error ("multiple types in one declaration");
6520 /* Inside a class, we might be in a friend or access declaration.
6521 Until we have a good way of detecting the latter, don't warn. */
6522 if (t == NULL_TREE && ! current_class_type)
6523 pedwarn ("declaration does not declare anything");
6525 /* Check for an anonymous union. We're careful
6526 accessing TYPE_IDENTIFIER because some built-in types, like
6527 pointer-to-member types, do not have TYPE_NAME. */
6528 else if (t && IS_AGGR_TYPE_CODE (TREE_CODE (t))
6530 && ANON_AGGRNAME_P (TYPE_IDENTIFIER (t)))
6532 /* Anonymous unions are objects, so they can have specifiers. */;
6533 SET_ANON_AGGR_TYPE_P (t);
6535 if (TREE_CODE (t) != UNION_TYPE && pedantic && ! in_system_header)
6536 pedwarn ("ISO C++ prohibits anonymous structs");
6539 else if (ob_modifier)
6541 if (ob_modifier == ridpointers[(int) RID_INLINE]
6542 || ob_modifier == ridpointers[(int) RID_VIRTUAL])
6543 cp_error ("`%D' can only be specified for functions", ob_modifier);
6544 else if (ob_modifier == ridpointers[(int) RID_FRIEND])
6545 cp_error ("`%D' can only be specified inside a class", ob_modifier);
6546 else if (ob_modifier == ridpointers[(int) RID_EXPLICIT])
6547 cp_error ("`%D' can only be specified for constructors",
6550 cp_error ("`%D' can only be specified for objects and functions",
6557 /* Called when a declaration is seen that contains no names to declare.
6558 If its type is a reference to a structure, union or enum inherited
6559 from a containing scope, shadow that tag name for the current scope
6560 with a forward reference.
6561 If its type defines a new named structure or union
6562 or defines an enum, it is valid but we need not do anything here.
6563 Otherwise, it is an error.
6565 C++: may have to grok the declspecs to learn about static,
6566 complain for anonymous unions. */
6569 shadow_tag (declspecs)
6572 tree t = check_tag_decl (declspecs);
6575 maybe_process_partial_specialization (t);
6577 /* This is where the variables in an anonymous union are
6578 declared. An anonymous union declaration looks like:
6580 because there is no declarator after the union, the parser
6581 sends that declaration here. */
6582 if (t && ANON_AGGR_TYPE_P (t))
6584 fixup_anonymous_aggr (t);
6586 if (TYPE_FIELDS (t))
6588 tree decl = grokdeclarator (NULL_TREE, declspecs, NORMAL, 0,
6590 finish_anon_union (decl);
6595 /* Decode a "typename", such as "int **", returning a ..._TYPE node. */
6598 groktypename (typename)
6601 if (TREE_CODE (typename) != TREE_LIST)
6603 return grokdeclarator (TREE_VALUE (typename),
6604 TREE_PURPOSE (typename),
6605 TYPENAME, 0, NULL_TREE);
6608 /* Decode a declarator in an ordinary declaration or data definition.
6609 This is called as soon as the type information and variable name
6610 have been parsed, before parsing the initializer if any.
6611 Here we create the ..._DECL node, fill in its type,
6612 and put it on the list of decls for the current context.
6613 The ..._DECL node is returned as the value.
6615 Exception: for arrays where the length is not specified,
6616 the type is left null, to be filled in by `cp_finish_decl'.
6618 Function definitions do not come here; they go to start_function
6619 instead. However, external and forward declarations of functions
6620 do go through here. Structure field declarations are done by
6621 grokfield and not through here. */
6623 /* Set this to zero to debug not using the temporary obstack
6624 to parse initializers. */
6625 int debug_temp_inits = 1;
6628 start_decl (declarator, declspecs, initialized, attributes, prefix_attributes)
6629 tree declarator, declspecs;
6631 tree attributes, prefix_attributes;
6634 register tree type, tem;
6636 extern int have_extern_spec;
6637 extern int used_extern_spec;
6641 /* See code below that used this. */
6642 int init_written = initialized;
6645 /* This should only be done once on the top most decl. */
6646 if (have_extern_spec && !used_extern_spec)
6648 declspecs = decl_tree_cons (NULL_TREE, get_identifier ("extern"),
6650 used_extern_spec = 1;
6653 if (attributes || prefix_attributes)
6654 attrlist = build_scratch_list (attributes, prefix_attributes);
6656 attrlist = NULL_TREE;
6658 decl = grokdeclarator (declarator, declspecs, NORMAL, initialized,
6661 if (decl == NULL_TREE || TREE_CODE (decl) == VOID_TYPE)
6664 type = TREE_TYPE (decl);
6666 if (type == error_mark_node)
6670 = (TREE_CODE (decl) == FUNCTION_DECL && DECL_VIRTUAL_P (decl))
6671 ? DECL_CLASS_CONTEXT (decl)
6672 : DECL_CONTEXT (decl);
6674 if (initialized && context && TREE_CODE (context) == NAMESPACE_DECL
6675 && context != current_namespace && TREE_CODE (decl) == VAR_DECL)
6677 /* When parsing the initializer, lookup should use the object's
6679 push_decl_namespace (context);
6682 /* We are only interested in class contexts, later. */
6683 if (context && TREE_CODE (context) == NAMESPACE_DECL)
6684 context = NULL_TREE;
6687 /* Is it valid for this decl to have an initializer at all?
6688 If not, set INITIALIZED to zero, which will indirectly
6689 tell `cp_finish_decl' to ignore the initializer once it is parsed. */
6690 switch (TREE_CODE (decl))
6693 /* typedef foo = bar means give foo the same type as bar.
6694 We haven't parsed bar yet, so `cp_finish_decl' will fix that up.
6695 Any other case of an initialization in a TYPE_DECL is an error. */
6696 if (pedantic || list_length (declspecs) > 1)
6698 cp_error ("typedef `%D' is initialized", decl);
6704 cp_error ("function `%#D' is initialized like a variable", decl);
6714 if (! toplevel_bindings_p ()
6715 && DECL_EXTERNAL (decl))
6716 cp_warning ("declaration of `%#D' has `extern' and is initialized",
6718 DECL_EXTERNAL (decl) = 0;
6719 if (toplevel_bindings_p ())
6720 TREE_STATIC (decl) = 1;
6722 /* Tell `pushdecl' this is an initialized decl
6723 even though we don't yet have the initializer expression.
6724 Also tell `cp_finish_decl' it may store the real initializer. */
6725 DECL_INITIAL (decl) = error_mark_node;
6728 #ifdef SET_DEFAULT_DECL_ATTRIBUTES
6729 SET_DEFAULT_DECL_ATTRIBUTES (decl, attributes);
6732 /* Set attributes here so if duplicate decl, will have proper attributes. */
6733 cplus_decl_attributes (decl, attributes, prefix_attributes);
6735 if (context && TYPE_SIZE (complete_type (context)) != NULL_TREE)
6737 push_nested_class (context, 2);
6739 if (TREE_CODE (decl) == VAR_DECL)
6741 tree field = lookup_field (context, DECL_NAME (decl), 0, 0);
6742 if (field == NULL_TREE || TREE_CODE (field) != VAR_DECL)
6743 cp_error ("`%#D' is not a static member of `%#T'", decl, context);
6746 if (DECL_CONTEXT (field) != context)
6748 cp_pedwarn ("ANSI C++ does not permit `%T::%D' to be defined as `%T::%D'",
6749 DECL_CONTEXT (field), DECL_NAME (decl),
6750 context, DECL_NAME (decl));
6751 DECL_CONTEXT (decl) = DECL_CONTEXT (field);
6753 /* Static data member are tricky; an in-class initialization
6754 still doesn't provide a definition, so the in-class
6755 declaration will have DECL_EXTERNAL set, but will have an
6756 initialization. Thus, duplicate_decls won't warn
6757 about this situation, and so we check here. */
6758 if (DECL_INITIAL (decl) && DECL_INITIAL (field))
6759 cp_error ("duplicate initialization of %D", decl);
6760 if (duplicate_decls (decl, field))
6766 tree field = check_classfn (context, decl);
6767 if (field && duplicate_decls (decl, field))
6771 /* cp_finish_decl sets DECL_EXTERNAL if DECL_IN_AGGR_P is set. */
6772 DECL_IN_AGGR_P (decl) = 0;
6773 if ((DECL_LANG_SPECIFIC (decl) && DECL_USE_TEMPLATE (decl))
6774 || CLASSTYPE_USE_TEMPLATE (context))
6776 SET_DECL_TEMPLATE_SPECIALIZATION (decl);
6777 /* [temp.expl.spec] An explicit specialization of a static data
6778 member of a template is a definition if the declaration
6779 includes an initializer; otherwise, it is a declaration.
6781 We check for processing_specialization so this only applies
6782 to the new specialization syntax. */
6783 if (DECL_INITIAL (decl) == NULL_TREE && processing_specialization)
6784 DECL_EXTERNAL (decl) = 1;
6787 if (DECL_EXTERNAL (decl) && ! DECL_TEMPLATE_SPECIALIZATION (decl))
6788 cp_pedwarn ("declaration of `%#D' outside of class is not definition",
6792 /* Enter this declaration into the symbol table. */
6793 tem = maybe_push_decl (decl);
6795 if (processing_template_decl)
6796 tem = push_template_decl (tem);
6798 #if ! defined (ASM_OUTPUT_BSS) && ! defined (ASM_OUTPUT_ALIGNED_BSS)
6799 /* Tell the back-end to use or not use .common as appropriate. If we say
6800 -fconserve-space, we want this to save .data space, at the expense of
6801 wrong semantics. If we say -fno-conserve-space, we want this to
6802 produce errors about redefs; to do this we force variables into the
6804 DECL_COMMON (tem) = flag_conserve_space || ! TREE_PUBLIC (tem);
6807 if (! processing_template_decl)
6817 tree type = TREE_TYPE (decl);
6818 int initialized = (DECL_INITIAL (decl) != NULL_TREE);
6820 if (type == error_mark_node)
6823 /* If this type of object needs a cleanup, but we're not allowed to
6824 add any more objects with cleanups to the current scope, create a
6825 new binding level. */
6826 if (TYPE_NEEDS_DESTRUCTOR (type)
6827 && current_binding_level->more_cleanups_ok == 0)
6829 keep_next_level (2);
6832 add_scope_stmt (/*begin_p=*/1, /*partial_p=*/1);
6836 /* Is it valid for this decl to have an initializer at all?
6837 If not, set INITIALIZED to zero, which will indirectly
6838 tell `cp_finish_decl' to ignore the initializer once it is parsed. */
6840 /* Don't allow initializations for incomplete types except for
6841 arrays which might be completed by the initialization. */
6842 if (TYPE_SIZE (complete_type (type)) != NULL_TREE)
6843 ; /* A complete type is ok. */
6844 else if (TREE_CODE (type) != ARRAY_TYPE)
6846 cp_error ("variable `%#D' has initializer but incomplete type",
6849 type = TREE_TYPE (decl) = error_mark_node;
6851 else if (TYPE_SIZE (complete_type (TREE_TYPE (type))) == NULL_TREE)
6853 if (DECL_LANG_SPECIFIC (decl) && DECL_TEMPLATE_INFO (decl))
6854 cp_error ("elements of array `%#D' have incomplete type", decl);
6855 /* else we already gave an error in start_decl. */
6861 && TREE_CODE (decl) != TYPE_DECL
6862 && TREE_CODE (decl) != TEMPLATE_DECL
6863 && IS_AGGR_TYPE (type) && ! DECL_EXTERNAL (decl))
6865 if ((! processing_template_decl || ! uses_template_parms (type))
6866 && TYPE_SIZE (complete_type (type)) == NULL_TREE)
6868 cp_error ("aggregate `%#D' has incomplete type and cannot be initialized",
6870 /* Change the type so that assemble_variable will give
6871 DECL an rtl we can live with: (mem (const_int 0)). */
6872 type = TREE_TYPE (decl) = error_mark_node;
6876 /* If any base type in the hierarchy of TYPE needs a constructor,
6877 then we set initialized to 1. This way any nodes which are
6878 created for the purposes of initializing this aggregate
6879 will live as long as it does. This is necessary for global
6880 aggregates which do not have their initializers processed until
6881 the end of the file. */
6882 initialized = TYPE_NEEDS_CONSTRUCTING (type);
6887 DECL_INITIAL (decl) = NULL_TREE;
6890 /* Handle initialization of references.
6891 These three arguments are from `cp_finish_decl', and have the
6892 same meaning here that they do there.
6894 Quotes on semantics can be found in ARM 8.4.3. */
6897 grok_reference_init (decl, type, init)
6898 tree decl, type, init;
6902 if (init == NULL_TREE)
6904 if ((DECL_LANG_SPECIFIC (decl) == 0
6905 || DECL_IN_AGGR_P (decl) == 0)
6906 && ! DECL_THIS_EXTERN (decl))
6907 cp_error ("`%D' declared as reference but not initialized", decl);
6911 if (init == error_mark_node)
6914 if (TREE_CODE (init) == CONSTRUCTOR)
6916 cp_error ("ANSI C++ forbids use of initializer list to initialize reference `%D'", decl);
6920 if (TREE_CODE (init) == TREE_LIST)
6921 init = build_compound_expr (init);
6923 if (TREE_CODE (TREE_TYPE (init)) == REFERENCE_TYPE)
6924 init = convert_from_reference (init);
6926 if (TREE_CODE (TREE_TYPE (type)) != ARRAY_TYPE
6927 && TREE_CODE (TREE_TYPE (init)) == ARRAY_TYPE)
6929 /* Note: default conversion is only called in very special cases. */
6930 init = default_conversion (init);
6933 /* Convert INIT to the reference type TYPE. This may involve the
6934 creation of a temporary, whose lifetime must be the same as that
6935 of the reference. If so, a DECL_STMT for the temporary will be
6936 added just after the DECL_STMT for DECL. That's why we don't set
6937 DECL_INITIAL for local references (instead assigning to them
6938 explicitly); we need to allow the temporary to be initialized
6940 tmp = convert_to_reference
6941 (type, init, CONV_IMPLICIT,
6942 LOOKUP_SPECULATIVELY|LOOKUP_NORMAL|DIRECT_BIND, decl);
6944 if (tmp == error_mark_node)
6946 else if (tmp != NULL_TREE)
6949 tmp = save_expr (tmp);
6950 if (building_stmt_tree ())
6952 /* Initialize the declaration. */
6953 tmp = build (INIT_EXPR, TREE_TYPE (decl), decl, tmp);
6954 finish_expr_stmt (tmp);
6957 DECL_INITIAL (decl) = tmp;
6961 cp_error ("cannot initialize `%T' from `%T'", type, TREE_TYPE (init));
6965 if (TREE_STATIC (decl) && ! TREE_CONSTANT (DECL_INITIAL (decl)))
6967 expand_static_init (decl, DECL_INITIAL (decl));
6968 DECL_INITIAL (decl) = NULL_TREE;
6973 /* Fill in DECL_INITIAL with some magical value to prevent expand_decl from
6974 mucking with forces it does not comprehend (i.e. initialization with a
6975 constructor). If we are at global scope and won't go into COMMON, fill
6976 it in with a dummy CONSTRUCTOR to force the variable into .data;
6977 otherwise we can use error_mark_node. */
6980 obscure_complex_init (decl, init)
6983 if (! flag_no_inline && TREE_STATIC (decl))
6985 if (extract_init (decl, init))
6989 #if ! defined (ASM_OUTPUT_BSS) && ! defined (ASM_OUTPUT_ALIGNED_BSS)
6990 if (toplevel_bindings_p () && ! DECL_COMMON (decl))
6991 DECL_INITIAL (decl) = build (CONSTRUCTOR, TREE_TYPE (decl), NULL_TREE,
6995 DECL_INITIAL (decl) = error_mark_node;
7000 /* When parsing `int a[] = {1, 2};' we don't know the size of the
7001 array until we finish parsing the initializer. If that's the
7002 situation we're in, update DECL accordingly. */
7005 maybe_deduce_size_from_array_init (decl, init)
7009 tree type = TREE_TYPE (decl);
7011 if (TREE_CODE (type) == ARRAY_TYPE
7012 && TYPE_DOMAIN (type) == NULL_TREE
7013 && TREE_CODE (decl) != TYPE_DECL)
7016 = (TREE_STATIC (decl)
7017 /* Even if pedantic, an external linkage array
7018 may have incomplete type at first. */
7019 ? pedantic && ! DECL_EXTERNAL (decl)
7020 : !DECL_EXTERNAL (decl));
7021 tree initializer = init ? init : DECL_INITIAL (decl);
7022 int failure = complete_array_type (type, initializer, do_default);
7025 cp_error ("initializer fails to determine size of `%D'", decl);
7030 cp_error ("array size missing in `%D'", decl);
7031 /* If a `static' var's size isn't known, make it extern as
7032 well as static, so it does not get allocated. If it's not
7033 `static', then don't mark it extern; finish_incomplete_decl
7034 will give it a default size and it will get allocated. */
7035 else if (!pedantic && TREE_STATIC (decl) && !TREE_PUBLIC (decl))
7036 DECL_EXTERNAL (decl) = 1;
7039 if (pedantic && TYPE_DOMAIN (type) != NULL_TREE
7040 && tree_int_cst_lt (TYPE_MAX_VALUE (TYPE_DOMAIN (type)),
7042 cp_error ("zero-size array `%D'", decl);
7044 layout_decl (decl, 0);
7048 /* Set DECL_SIZE, DECL_ALIGN, etc. for DECL (a VAR_DECL), and issue
7049 any appropriate error messages regarding the layout. */
7052 layout_var_decl (decl)
7055 tree type = TREE_TYPE (decl);
7057 tree ttype = target_type (type);
7060 /* If we haven't already layed out this declaration, do so now.
7061 Note that we must not call complete type for an external object
7062 because it's type might involve templates that we are not
7063 supposed to isntantiate yet. (And it's perfectly legal to say
7064 `extern X x' for some incomplete type `X'.) */
7065 if (!DECL_EXTERNAL (decl))
7066 complete_type (type);
7067 if (!DECL_SIZE (decl)&& TYPE_SIZE (type))
7068 layout_decl (decl, 0);
7070 if (!DECL_EXTERNAL (decl) && DECL_SIZE (decl) == NULL_TREE)
7072 /* An automatic variable with an incomplete type: that is an error.
7073 Don't talk about array types here, since we took care of that
7074 message in grokdeclarator. */
7075 cp_error ("storage size of `%D' isn't known", decl);
7076 TREE_TYPE (decl) = error_mark_node;
7079 /* Keep this code around in case we later want to control debug info
7080 based on whether a type is "used". (jason 1999-11-11) */
7082 else if (!DECL_EXTERNAL (decl) && IS_AGGR_TYPE (ttype))
7083 /* Let debugger know it should output info for this type. */
7084 note_debug_info_needed (ttype);
7086 if (TREE_STATIC (decl) && DECL_CLASS_SCOPE_P (decl))
7087 note_debug_info_needed (DECL_CONTEXT (decl));
7090 if ((DECL_EXTERNAL (decl) || TREE_STATIC (decl))
7091 && DECL_SIZE (decl) != NULL_TREE
7092 && ! TREE_CONSTANT (DECL_SIZE (decl)))
7094 if (TREE_CODE (DECL_SIZE (decl)) == INTEGER_CST)
7095 constant_expression_warning (DECL_SIZE (decl));
7097 cp_error ("storage size of `%D' isn't constant", decl);
7101 /* If a local static variable is declared in an inline function, or if
7102 we have a weak definition, we must endeavor to create only one
7103 instance of the variable at link-time. */
7106 maybe_commonize_var (decl)
7109 /* Static data in a function with comdat linkage also has comdat
7111 if (TREE_STATIC (decl)
7112 /* Don't mess with __FUNCTION__. */
7113 && ! TREE_ASM_WRITTEN (decl)
7114 && current_function_decl
7115 && DECL_CONTEXT (decl) == current_function_decl
7116 && (DECL_THIS_INLINE (current_function_decl)
7117 || DECL_TEMPLATE_INSTANTIATION (current_function_decl))
7118 && TREE_PUBLIC (current_function_decl))
7120 /* Rather than try to get this right with inlining, we suppress
7121 inlining of such functions. */
7122 current_function_cannot_inline
7123 = "function with static variable cannot be inline";
7125 /* If flag_weak, we don't need to mess with this, as we can just
7126 make the function weak, and let it refer to its unique local
7127 copy. This works because we don't allow the function to be
7131 if (DECL_INTERFACE_KNOWN (current_function_decl))
7133 TREE_PUBLIC (decl) = 1;
7134 DECL_EXTERNAL (decl) = DECL_EXTERNAL (current_function_decl);
7136 else if (DECL_INITIAL (decl) == NULL_TREE
7137 || DECL_INITIAL (decl) == error_mark_node)
7139 TREE_PUBLIC (decl) = 1;
7140 DECL_COMMON (decl) = 1;
7142 /* else we lose. We can only do this if we can use common,
7143 which we can't if it has been initialized. */
7145 if (TREE_PUBLIC (decl))
7146 DECL_ASSEMBLER_NAME (decl)
7147 = build_static_name (current_function_decl, DECL_NAME (decl));
7148 else if (! DECL_ARTIFICIAL (decl))
7150 cp_warning_at ("sorry: semantics of inline function static data `%#D' are wrong (you'll wind up with multiple copies)", decl);
7151 cp_warning_at (" you can work around this by removing the initializer", decl);
7155 else if (DECL_LANG_SPECIFIC (decl) && DECL_COMDAT (decl))
7156 /* Set it up again; we might have set DECL_INITIAL since the last
7158 comdat_linkage (decl);
7161 /* Issue an error message if DECL is an uninitialized const variable. */
7164 check_for_uninitialized_const_var (decl)
7167 tree type = TREE_TYPE (decl);
7169 /* ``Unless explicitly declared extern, a const object does not have
7170 external linkage and must be initialized. ($8.4; $12.1)'' ARM
7172 if (TREE_CODE (decl) == VAR_DECL
7173 && TREE_CODE (type) != REFERENCE_TYPE
7174 && CP_TYPE_CONST_P (type)
7175 && !TYPE_NEEDS_CONSTRUCTING (type)
7176 && !DECL_INITIAL (decl))
7177 cp_error ("uninitialized const `%D'", decl);
7180 /* Verify INIT (the initializer for DECL), and record the
7181 initialization in DECL_INITIAL, if appropriate. Returns a new
7185 check_initializer (decl, init)
7191 if (TREE_CODE (decl) == FIELD_DECL)
7194 type = TREE_TYPE (decl);
7196 /* If `start_decl' didn't like having an initialization, ignore it now. */
7197 if (init != NULL_TREE && DECL_INITIAL (decl) == NULL_TREE)
7200 /* Check the initializer. */
7203 /* Things that are going to be initialized need to have complete
7205 TREE_TYPE (decl) = type = complete_type (TREE_TYPE (decl));
7207 if (type == error_mark_node)
7208 /* We will have already complained. */
7210 else if (TYPE_SIZE (type) && !TREE_CONSTANT (TYPE_SIZE (type)))
7212 cp_error ("variable-sized object `%D' may not be initialized", decl);
7215 else if (TREE_CODE (type) == ARRAY_TYPE
7216 && !TYPE_SIZE (TREE_TYPE (type)))
7218 cp_error ("elements of array `%#D' have incomplete type", decl);
7221 else if (!TYPE_SIZE (type))
7223 cp_error ("`%D' has incomplete type", decl);
7224 TREE_TYPE (decl) = error_mark_node;
7229 if (TREE_CODE (decl) == CONST_DECL)
7231 my_friendly_assert (TREE_CODE (decl) != REFERENCE_TYPE, 148);
7233 DECL_INITIAL (decl) = init;
7235 /* This will keep us from needing to worry about our obstacks. */
7236 my_friendly_assert (init != NULL_TREE, 149);
7239 else if (!DECL_EXTERNAL (decl) && TREE_CODE (type) == REFERENCE_TYPE)
7241 if (TREE_STATIC (decl))
7242 make_decl_rtl (decl, NULL_PTR, toplevel_bindings_p ());
7243 grok_reference_init (decl, type, init);
7248 if (TYPE_HAS_CONSTRUCTOR (type) || TYPE_NEEDS_CONSTRUCTING (type))
7250 if (TREE_CODE (type) == ARRAY_TYPE)
7251 init = digest_init (type, init, (tree *) 0);
7252 else if (TREE_CODE (init) == CONSTRUCTOR
7253 && TREE_HAS_CONSTRUCTOR (init))
7255 if (TYPE_NON_AGGREGATE_CLASS (type))
7257 cp_error ("`%D' must be initialized by constructor, not by `{...}'",
7259 init = error_mark_node;
7262 goto dont_use_constructor;
7267 dont_use_constructor:
7268 if (TREE_CODE (init) != TREE_VEC)
7269 init = store_init_value (decl, init);
7273 /* We must hide the initializer so that expand_decl
7274 won't try to do something it does not understand. */
7275 init = obscure_complex_init (decl, init);
7277 else if (DECL_EXTERNAL (decl))
7279 else if (TREE_CODE_CLASS (TREE_CODE (type)) == 't'
7280 && (IS_AGGR_TYPE (type) || TYPE_NEEDS_CONSTRUCTING (type)))
7282 tree core_type = strip_array_types (type);
7284 if (! TYPE_NEEDS_CONSTRUCTING (core_type))
7286 if (CLASSTYPE_READONLY_FIELDS_NEED_INIT (core_type))
7287 cp_error ("structure `%D' with uninitialized const members", decl);
7288 if (CLASSTYPE_REF_FIELDS_NEED_INIT (core_type))
7289 cp_error ("structure `%D' with uninitialized reference members",
7293 check_for_uninitialized_const_var (decl);
7295 if (TYPE_SIZE (type) != NULL_TREE
7296 && TYPE_NEEDS_CONSTRUCTING (type))
7297 init = obscure_complex_init (decl, NULL_TREE);
7301 check_for_uninitialized_const_var (decl);
7306 /* If DECL is not a local variable, give it RTL. */
7309 make_rtl_for_nonlocal_decl (decl, init, asmspec)
7312 const char *asmspec;
7317 type = TREE_TYPE (decl);
7318 toplev = toplevel_bindings_p ();
7320 /* Handle non-variables up front. */
7321 if (TREE_CODE (decl) != VAR_DECL)
7323 rest_of_decl_compilation (decl, asmspec, toplev, at_eof);
7327 /* Set the DECL_ASSEMBLER_NAME for the variable. */
7329 DECL_ASSEMBLER_NAME (decl) = get_identifier (asmspec);
7331 if (DECL_VIRTUAL_P (decl))
7332 make_decl_rtl (decl, NULL_PTR, toplev);
7333 else if (TREE_READONLY (decl)
7334 && DECL_INITIAL (decl) != NULL_TREE
7335 && DECL_INITIAL (decl) != error_mark_node
7336 && ! EMPTY_CONSTRUCTOR_P (DECL_INITIAL (decl)))
7338 DECL_INITIAL (decl) = save_expr (DECL_INITIAL (decl));
7340 if (toplev && ! TREE_PUBLIC (decl))
7342 /* If this is a static const, change its apparent linkage
7343 if it belongs to a #pragma interface. */
7344 if (!interface_unknown)
7346 TREE_PUBLIC (decl) = 1;
7347 DECL_EXTERNAL (decl) = interface_only;
7349 make_decl_rtl (decl, asmspec, toplev);
7352 rest_of_decl_compilation (decl, asmspec, toplev, at_eof);
7354 else if (DECL_LANG_SPECIFIC (decl) && DECL_IN_AGGR_P (decl))
7356 my_friendly_assert (TREE_STATIC (decl), 19990828);
7358 if (init == NULL_TREE
7359 #ifdef DEFAULT_STATIC_DEFS
7360 /* If this code is dead, then users must
7361 explicitly declare static member variables
7362 outside the class def'n as well. */
7363 && TYPE_NEEDS_CONSTRUCTING (type)
7367 DECL_EXTERNAL (decl) = 1;
7368 make_decl_rtl (decl, asmspec, 1);
7371 rest_of_decl_compilation (decl, asmspec, toplev, at_eof);
7373 else if (TREE_CODE (CP_DECL_CONTEXT (decl)) == NAMESPACE_DECL
7374 || (TREE_CODE (decl) == VAR_DECL && TREE_STATIC (decl)))
7375 rest_of_decl_compilation (decl, asmspec, toplev, at_eof);
7378 /* Create RTL for the local static variable DECL. */
7381 make_rtl_for_local_static (decl)
7384 const char *asmspec = NULL;
7386 /* If we inlined this variable, we could see it's declaration
7388 if (DECL_RTL (decl))
7391 if (DECL_ASSEMBLER_NAME (decl) != DECL_NAME (decl))
7393 /* The only way this situaton can occur is if the
7394 user specified a name for this DECL using the
7395 `attribute' syntax. */
7396 asmspec = IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl));
7397 DECL_ASSEMBLER_NAME (decl) = DECL_NAME (decl);
7400 rest_of_decl_compilation (decl, asmspec, /*top_level=*/0, /*at_end=*/0);
7403 /* The old ARM scoping rules injected variables declared in the
7404 initialization statement of a for-statement into the surrounding
7405 scope. We support this usage, in order to be backward-compatible.
7406 DECL is a just-declared VAR_DECL; if necessary inject its
7407 declaration into the surrounding scope. */
7410 maybe_inject_for_scope_var (decl)
7413 if (current_binding_level->is_for_scope)
7415 struct binding_level *outer
7416 = current_binding_level->level_chain;
7418 /* Check to see if the same name is already bound at the outer
7419 level, either because it was directly declared, or because a
7420 dead for-decl got preserved. In either case, the code would
7421 not have been valid under the ARM scope rules, so clear
7422 is_for_scope for the current_binding_level.
7424 Otherwise, we need to preserve the temp slot for decl to last
7425 into the outer binding level. */
7428 = TREE_CHAIN (IDENTIFIER_BINDING (DECL_NAME (decl)));
7430 if (outer_binding && BINDING_LEVEL (outer_binding) == outer
7431 && (TREE_CODE (BINDING_VALUE (outer_binding))
7433 && DECL_DEAD_FOR_LOCAL (BINDING_VALUE (outer_binding)))
7435 BINDING_VALUE (outer_binding)
7436 = DECL_SHADOWED_FOR_VAR (BINDING_VALUE (outer_binding));
7437 current_binding_level->is_for_scope = 0;
7439 else if (DECL_IN_MEMORY_P (decl))
7440 preserve_temp_slots (DECL_RTL (decl));
7444 /* Generate code to initialize DECL (a local variable). */
7447 initialize_local_var (decl, init, flags)
7452 tree type = TREE_TYPE (decl);
7454 /* If the type is bogus, don't bother initializing the variable. */
7455 if (type == error_mark_node)
7458 if (DECL_SIZE (decl) == NULL_TREE && !TREE_STATIC (decl))
7460 /* If we used it already as memory, it must stay in memory. */
7461 DECL_INITIAL (decl) = NULL_TREE;
7462 TREE_ADDRESSABLE (decl) = TREE_USED (decl);
7465 /* Local statics are handled differently from ordinary automatic
7467 if (TREE_STATIC (decl))
7469 if (TYPE_NEEDS_CONSTRUCTING (type) || init != NULL_TREE
7470 || TYPE_NEEDS_DESTRUCTOR (type))
7471 expand_static_init (decl, init);
7475 if (DECL_SIZE (decl) && type != error_mark_node)
7479 /* Compute and store the initial value. */
7480 already_used = TREE_USED (decl) || TREE_USED (type);
7482 if (init || TYPE_NEEDS_CONSTRUCTING (type))
7484 int saved_stmts_are_full_exprs_p;
7486 emit_line_note (DECL_SOURCE_FILE (decl),
7487 DECL_SOURCE_LINE (decl));
7488 saved_stmts_are_full_exprs_p = stmts_are_full_exprs_p;
7489 stmts_are_full_exprs_p = 1;
7490 finish_expr_stmt (build_aggr_init (decl, init, flags));
7491 stmts_are_full_exprs_p = saved_stmts_are_full_exprs_p;
7494 /* Set this to 0 so we can tell whether an aggregate which was
7495 initialized was ever used. Don't do this if it has a
7496 destructor, so we don't complain about the 'resource
7497 allocation is initialization' idiom. Now set
7498 attribute((unused)) on types so decls of that type will be
7499 marked used. (see TREE_USED, above.) */
7500 if (TYPE_NEEDS_CONSTRUCTING (type)
7502 && !TYPE_NEEDS_DESTRUCTOR (type)
7503 && DECL_NAME (decl))
7504 TREE_USED (decl) = 0;
7505 else if (already_used)
7506 TREE_USED (decl) = 1;
7510 /* Generate code to destroy DECL (a local variable). */
7513 destroy_local_var (decl)
7516 tree type = TREE_TYPE (decl);
7519 /* Only variables get cleaned up. */
7520 if (TREE_CODE (decl) != VAR_DECL)
7523 /* And only things with destructors need cleaning up. */
7524 if (!TYPE_NEEDS_DESTRUCTOR (type))
7527 if (TREE_CODE (decl) == VAR_DECL &&
7528 (DECL_EXTERNAL (decl) || TREE_STATIC (decl)))
7529 /* We don't clean up things that aren't defined in this
7530 translation unit, or that need a static cleanup. The latter
7531 are handled by finish_file. */
7534 /* Compute the cleanup. */
7535 cleanup = maybe_build_cleanup (decl);
7537 /* Record the cleanup required for this declaration. */
7538 if (DECL_SIZE (decl) && TREE_TYPE (decl) != error_mark_node
7540 finish_decl_cleanup (decl, cleanup);
7543 /* Let the back-end know about DECL. */
7546 emit_local_var (decl)
7549 /* Create RTL for this variable. */
7550 if (DECL_RTL (decl))
7551 /* Only a RESULT_DECL should have non-NULL RTL when arriving here.
7552 All other local variables are assigned RTL in this function. */
7553 my_friendly_assert (TREE_CODE (decl) == RESULT_DECL,
7557 if (DECL_ASSEMBLER_NAME (decl) != DECL_NAME (decl))
7558 /* The user must have specified an assembler name for this
7559 variable. Set that up now. */
7560 rest_of_decl_compilation
7561 (decl, IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl)),
7562 /*top_level=*/0, /*at_end=*/0);
7567 /* Actually do the initialization. */
7568 expand_start_target_temps ();
7569 expand_decl_init (decl);
7570 expand_end_target_temps ();
7573 /* Finish processing of a declaration;
7574 install its line number and initial value.
7575 If the length of an array type is not known before,
7576 it must be determined now, from the initial value, or it is an error.
7578 For C++, `cp_finish_decl' must be fairly evasive: it must keep initializers
7579 for aggregates that have constructors alive on the permanent obstack,
7580 so that the global initializing functions can be written at the end.
7582 INIT0 holds the value of an initializer that should be allowed to escape
7585 FLAGS is LOOKUP_ONLYCONVERTING is the = init syntax was used, else 0
7586 if the (init) syntax was used.
7588 For functions that take default parameters, DECL points to its
7589 "maximal" instantiation. `cp_finish_decl' must then also declared its
7590 subsequently lower and lower forms of instantiation, checking for
7591 ambiguity as it goes. This can be sped up later. */
7594 cp_finish_decl (decl, init, asmspec_tree, flags)
7600 tree ttype = NULL_TREE;
7601 const char *asmspec = NULL;
7602 int was_readonly = 0;
7604 /* If this is 0, then we did not change obstacks. */
7608 error ("assignment (not initialization) in declaration");
7612 /* Handling __FUNCTION__ and its ilk in a template-function requires
7613 some special processing because we are called from
7614 language-independent code. */
7615 if (current_function && processing_template_decl
7616 && current_function_name_declared == 2)
7618 /* Since we're in a template function, we need to
7619 push_template_decl. The language-independent code in
7620 declare_hidden_char_array doesn't know to do this. */
7621 retrofit_lang_decl (decl);
7622 decl = push_template_decl (decl);
7624 if (strcmp (IDENTIFIER_POINTER (DECL_NAME (decl)),
7625 "__PRETTY_FUNCTION__") == 0)
7627 init = build (FUNCTION_NAME, const_string_type_node);
7628 DECL_PRETTY_FUNCTION_P (decl) = 1;
7632 /* If a name was specified, get the string. */
7634 asmspec = TREE_STRING_POINTER (asmspec_tree);
7636 if (init && TREE_CODE (init) == NAMESPACE_DECL)
7638 cp_error ("Cannot initialize `%D' to namespace `%D'",
7643 if (current_class_type
7644 && DECL_REAL_CONTEXT (decl) == current_class_type
7645 && TYPE_BEING_DEFINED (current_class_type)
7646 && (DECL_INITIAL (decl) || init))
7647 DECL_DEFINED_IN_CLASS_P (decl) = 1;
7649 if (TREE_CODE (decl) == VAR_DECL
7650 && DECL_CONTEXT (decl)
7651 && TREE_CODE (DECL_CONTEXT (decl)) == NAMESPACE_DECL
7652 && DECL_CONTEXT (decl) != current_namespace
7655 /* Leave the namespace of the object. */
7656 pop_decl_namespace ();
7659 type = TREE_TYPE (decl);
7661 if (type == error_mark_node)
7664 /* Add this declaration to the statement-tree. */
7665 if (building_stmt_tree () && at_function_scope_p ())
7666 add_decl_stmt (decl);
7668 if (TYPE_HAS_MUTABLE_P (type))
7669 TREE_READONLY (decl) = 0;
7671 if (processing_template_decl)
7673 if (init && DECL_INITIAL (decl))
7674 DECL_INITIAL (decl) = init;
7678 /* Parameters are handled by store_parm_decls, not cp_finish_decl. */
7679 my_friendly_assert (TREE_CODE (decl) != PARM_DECL, 19990828);
7681 /* Take care of TYPE_DECLs up front. */
7682 if (TREE_CODE (decl) == TYPE_DECL)
7684 if (init && DECL_INITIAL (decl))
7686 /* typedef foo = bar; store the type of bar as the type of foo. */
7687 TREE_TYPE (decl) = type = TREE_TYPE (init);
7688 DECL_INITIAL (decl) = init = NULL_TREE;
7690 if (type != error_mark_node
7691 && IS_AGGR_TYPE (type) && DECL_NAME (decl))
7693 if (TREE_TYPE (DECL_NAME (decl)) && TREE_TYPE (decl) != type)
7694 cp_warning ("shadowing previous type declaration of `%#D'", decl);
7695 set_identifier_type_value (DECL_NAME (decl), type);
7696 CLASSTYPE_GOT_SEMICOLON (type) = 1;
7698 GNU_xref_decl (current_function_decl, decl);
7700 /* If we have installed this as the canonical typedef for this
7701 type, and that type has not been defined yet, delay emitting
7702 the debug information for it, as we will emit it later. */
7703 if (TYPE_MAIN_DECL (TREE_TYPE (decl)) == decl
7704 && TYPE_SIZE (TREE_TYPE (decl)) == NULL_TREE)
7705 TYPE_DECL_SUPPRESS_DEBUG (decl) = 1;
7707 rest_of_decl_compilation (decl, NULL_PTR,
7708 DECL_CONTEXT (decl) == NULL_TREE, at_eof);
7712 if (TREE_CODE (decl) != FUNCTION_DECL)
7713 ttype = target_type (type);
7715 if (! DECL_EXTERNAL (decl) && TREE_READONLY (decl)
7716 && TYPE_NEEDS_CONSTRUCTING (type))
7718 /* Currently, GNU C++ puts constants in text space, making them
7719 impossible to initialize. In the future, one would hope for
7720 an operating system which understood the difference between
7721 initialization and the running of a program. */
7723 TREE_READONLY (decl) = 0;
7726 if (TREE_CODE (decl) == FIELD_DECL && asmspec)
7728 /* This must override the asm specifier which was placed by
7729 grokclassfn. Lay this out fresh. */
7730 DECL_RTL (TREE_TYPE (decl)) = NULL_RTX;
7731 DECL_ASSEMBLER_NAME (decl) = get_identifier (asmspec);
7732 make_decl_rtl (decl, asmspec, 0);
7735 /* Deduce size of array from initialization, if not already known. */
7736 maybe_deduce_size_from_array_init (decl, init);
7737 init = check_initializer (decl, init);
7739 GNU_xref_decl (current_function_decl, decl);
7741 if (TREE_CODE (decl) == VAR_DECL)
7742 layout_var_decl (decl);
7744 /* Output the assembler code and/or RTL code for variables and functions,
7745 unless the type is an undefined structure or union.
7746 If not, it will get done when the type is completed. */
7747 if (TREE_CODE (decl) == VAR_DECL || TREE_CODE (decl) == FUNCTION_DECL
7748 || TREE_CODE (decl) == RESULT_DECL)
7750 if (TREE_CODE (decl) == VAR_DECL)
7751 maybe_commonize_var (decl);
7753 make_rtl_for_nonlocal_decl (decl, init, asmspec);
7755 if (TREE_CODE (type) == FUNCTION_TYPE
7756 || TREE_CODE (type) == METHOD_TYPE)
7757 abstract_virtuals_error (decl,
7758 strip_array_types (TREE_TYPE (type)));
7760 abstract_virtuals_error (decl, strip_array_types (type));
7762 if (TREE_CODE (decl) == FUNCTION_DECL)
7764 else if (DECL_EXTERNAL (decl)
7765 && ! (DECL_LANG_SPECIFIC (decl)
7766 && DECL_NOT_REALLY_EXTERN (decl)))
7769 DECL_INITIAL (decl) = init;
7771 else if (TREE_CODE (CP_DECL_CONTEXT (decl)) == FUNCTION_DECL)
7773 /* This is a local declaration. */
7774 if (doing_semantic_analysis_p ())
7775 maybe_inject_for_scope_var (decl);
7776 /* Initialize the local variable. But, if we're building a
7777 statement-tree, we'll do the initialization when we
7779 if (processing_template_decl)
7781 if (init || DECL_INITIAL (decl) == error_mark_node)
7782 DECL_INITIAL (decl) = init;
7786 /* If we're not building RTL, then we need to do so
7788 if (!building_stmt_tree ())
7789 emit_local_var (decl);
7790 /* Initialize the variable. */
7791 initialize_local_var (decl, init, flags);
7792 /* Clean up the variable. */
7793 destroy_local_var (decl);
7796 else if (TREE_STATIC (decl) && type != error_mark_node)
7798 /* Cleanups for static variables are handled by `finish_file'. */
7799 if (TYPE_NEEDS_CONSTRUCTING (type) || init != NULL_TREE
7800 || TYPE_NEEDS_DESTRUCTOR (type))
7801 expand_static_init (decl, init);
7805 /* Undo call to `pushclass' that was done in `start_decl'
7806 due to initialization of qualified member variable.
7807 I.e., Foo::x = 10; */
7809 tree context = DECL_REAL_CONTEXT (decl);
7811 && TREE_CODE_CLASS (TREE_CODE (context)) == 't'
7812 && (TREE_CODE (decl) == VAR_DECL
7813 /* We also have a pushclass done that we need to undo here
7814 if we're at top level and declare a method. */
7815 || TREE_CODE (decl) == FUNCTION_DECL)
7816 /* If size hasn't been set, we're still defining it,
7817 and therefore inside the class body; don't pop
7818 the binding level.. */
7819 && TYPE_SIZE (context) != NULL_TREE
7820 && context == current_class_type)
7821 pop_nested_class ();
7827 /* If requested, warn about definitions of large data objects. */
7829 if (warn_larger_than
7830 && ! processing_template_decl
7831 && (TREE_CODE (decl) == VAR_DECL || TREE_CODE (decl) == PARM_DECL)
7832 && !DECL_EXTERNAL (decl))
7834 register tree decl_size = DECL_SIZE (decl);
7836 if (decl_size && TREE_CODE (decl_size) == INTEGER_CST)
7838 unsigned units = TREE_INT_CST_LOW (decl_size) / BITS_PER_UNIT;
7840 if (units > larger_than_size)
7841 warning_with_decl (decl, "size of `%s' is %u bytes", units);
7846 TREE_READONLY (decl) = 1;
7849 /* This is here for a midend callback from c-common.c */
7852 finish_decl (decl, init, asmspec_tree)
7856 cp_finish_decl (decl, init, asmspec_tree, 0);
7859 /* Generate code to handle the destruction of the function-scoped
7860 static variable DECL. */
7863 destroy_local_static (decl)
7866 tree cleanup, fcall;
7868 int saved_flag_access_control;
7870 if (atexit_node == 0)
7872 tree atexit_fndecl, PFV, pfvlist;
7874 PFV = build_pointer_type (build_function_type
7875 (void_type_node, void_list_node));
7877 pfvlist = tree_cons (NULL_TREE, PFV, void_list_node);
7879 push_lang_context (lang_name_c);
7880 /* Note that we do not call pushdecl for this function;
7881 there's no reason that this declaration should be
7882 accessible to anyone. */
7884 = define_function ("atexit",
7885 build_function_type (void_type_node,
7887 /*pfn=*/0, NULL_PTR);
7888 mark_used (atexit_fndecl);
7889 atexit_node = default_conversion (atexit_fndecl);
7890 pop_lang_context ();
7893 /* Call build_cleanup before we enter the anonymous function so that
7894 any access checks will be done relative to the current scope,
7895 rather than the scope of the anonymous function. */
7896 build_cleanup (decl);
7898 /* Now start the function. */
7899 cleanup = start_anon_func ();
7901 /* Now, recompute the cleanup. It may contain SAVE_EXPRs that refer
7902 to the original function, rather than the anonymous one. That
7903 will make the back-end think that nested functions are in use,
7904 which causes confusion. */
7905 saved_flag_access_control = flag_access_control;
7906 flag_access_control = 0;
7907 fcall = build_cleanup (decl);
7908 flag_access_control = saved_flag_access_control;
7910 /* Create the body of the anonymous function. */
7911 compound_stmt = begin_compound_stmt (/*has_no_scope=*/0);
7912 finish_expr_stmt (fcall);
7913 finish_compound_stmt (/*has_no_scope=*/0, compound_stmt);
7916 /* Call atexit with the cleanup function. */
7917 mark_addressable (cleanup);
7918 cleanup = build_unary_op (ADDR_EXPR, cleanup, 0);
7919 fcall = build_function_call (atexit_node,
7920 tree_cons (NULL_TREE,
7923 finish_expr_stmt (fcall);
7927 expand_static_init (decl, init)
7931 tree oldstatic = value_member (decl, static_aggregates);
7935 if (TREE_PURPOSE (oldstatic) && init != NULL_TREE)
7936 cp_error ("multiple initializations given for `%D'", decl);
7938 else if (! toplevel_bindings_p ())
7940 /* Emit code to perform this initialization but once. */
7947 /* Emit code to perform this initialization but once. This code
7950 static int temp = 0;
7952 // Do initialization.
7954 // Register variable for destruction at end of program.
7957 Note that the `temp' variable is only set to 1 *after* the
7958 initialization is complete. This ensures that an exception,
7959 thrown during the construction, will cause the variable to
7960 reinitialized when we pass through this code again, as per:
7964 If the initialization exits by throwing an exception, the
7965 initialization is not complete, so it will be tried again
7966 the next time control enters the declaration.
7968 In theory, this process should be thread-safe, too; multiple
7969 threads should not be able to initialize the variable more
7970 than once. We don't yet attempt to ensure thread-safety. */
7971 temp = get_temp_name (integer_type_node, 1);
7972 rest_of_decl_compilation (temp, NULL_PTR, 0, 0);
7974 /* Begin the conditional initialization. */
7975 if_stmt = begin_if_stmt ();
7976 finish_if_stmt_cond (build_binary_op (EQ_EXPR, temp,
7979 then_clause = begin_compound_stmt (/*has_no_scope=*/0);
7981 /* Do the initialization itself. */
7982 if (TYPE_NEEDS_CONSTRUCTING (TREE_TYPE (decl))
7983 || (init && TREE_CODE (init) == TREE_LIST))
7984 assignment = build_aggr_init (decl, init, 0);
7986 /* The initialization we're doing here is just a bitwise
7988 assignment = build (INIT_EXPR, TREE_TYPE (decl), decl, init);
7990 assignment = NULL_TREE;
7992 /* Once the assignment is complete, set TEMP to 1. Since the
7993 construction of the static object is complete at this point,
7994 we want to make sure TEMP is set to 1 even if a temporary
7995 constructed during the initialization throws an exception
7996 when it is destroyed. So, we combine the initialization and
7997 the assignment to TEMP into a single expression, ensuring
7998 that when we call finish_expr_stmt the cleanups will not be
7999 run until after TEMP is set to 1. */
8000 temp_init = build_modify_expr (temp, NOP_EXPR, integer_one_node);
8003 assignment = tree_cons (NULL_TREE, assignment,
8004 build_tree_list (NULL_TREE,
8006 assignment = build_compound_expr (assignment);
8009 assignment = temp_init;
8010 finish_expr_stmt (assignment);
8012 /* Use atexit to register a function for destroying this static
8014 if (TYPE_NEEDS_DESTRUCTOR (TREE_TYPE (decl)))
8015 destroy_local_static (decl);
8017 finish_compound_stmt (/*has_no_scope=*/0, then_clause);
8018 finish_then_clause (if_stmt);
8023 /* This code takes into account memory allocation policy of
8024 `start_decl'. Namely, if TYPE_NEEDS_CONSTRUCTING does not
8025 hold for this object, then we must make permanent the storage
8026 currently in the temporary obstack. */
8027 if (!TYPE_NEEDS_CONSTRUCTING (TREE_TYPE (decl)))
8028 preserve_initializer ();
8029 static_aggregates = tree_cons (init, decl, static_aggregates);
8033 /* Finish the declaration of a catch-parameter. */
8036 start_handler_parms (declspecs, declarator)
8043 decl = grokdeclarator (declarator, declspecs, CATCHPARM,
8045 if (decl == NULL_TREE)
8046 error ("invalid catch parameter");
8055 /* Make TYPE a complete type based on INITIAL_VALUE.
8056 Return 0 if successful, 1 if INITIAL_VALUE can't be deciphered,
8057 2 if there was no information (in which case assume 0 if DO_DEFAULT). */
8060 complete_array_type (type, initial_value, do_default)
8061 tree type, initial_value;
8064 register tree maxindex = NULL_TREE;
8069 /* Note MAXINDEX is really the maximum index,
8070 one less than the size. */
8071 if (TREE_CODE (initial_value) == STRING_CST)
8074 = int_size_in_bytes (TREE_TYPE (TREE_TYPE (initial_value)));
8075 maxindex = build_int_2 ((TREE_STRING_LENGTH (initial_value)
8078 else if (TREE_CODE (initial_value) == CONSTRUCTOR)
8080 tree elts = CONSTRUCTOR_ELTS (initial_value);
8081 maxindex = size_binop (MINUS_EXPR, integer_zero_node, size_one_node);
8082 for (; elts; elts = TREE_CHAIN (elts))
8084 if (TREE_PURPOSE (elts))
8085 maxindex = TREE_PURPOSE (elts);
8087 maxindex = size_binop (PLUS_EXPR, maxindex, size_one_node);
8089 maxindex = copy_node (maxindex);
8093 /* Make an error message unless that happened already. */
8094 if (initial_value != error_mark_node)
8097 initial_value = NULL_TREE;
8099 /* Prevent further error messages. */
8100 maxindex = build_int_2 (0, 0);
8107 maxindex = build_int_2 (0, 0);
8116 domain = build_index_type (maxindex);
8117 TYPE_DOMAIN (type) = domain;
8119 if (! TREE_TYPE (maxindex))
8120 TREE_TYPE (maxindex) = domain;
8122 itype = TREE_TYPE (initial_value);
8125 if (itype && !TYPE_DOMAIN (itype))
8126 TYPE_DOMAIN (itype) = domain;
8127 /* The type of the main variant should never be used for arrays
8128 of different sizes. It should only ever be completed with the
8129 size of the array. */
8130 if (! TYPE_DOMAIN (TYPE_MAIN_VARIANT (type)))
8131 TYPE_DOMAIN (TYPE_MAIN_VARIANT (type)) = domain;
8134 /* Lay out the type now that we can get the real answer. */
8141 /* Return zero if something is declared to be a member of type
8142 CTYPE when in the context of CUR_TYPE. STRING is the error
8143 message to print in that case. Otherwise, quietly return 1. */
8146 member_function_or_else (ctype, cur_type, string)
8147 tree ctype, cur_type;
8150 if (ctype && ctype != cur_type)
8152 error (string, TYPE_NAME_STRING (ctype));
8158 /* Subroutine of `grokdeclarator'. */
8160 /* Generate errors possibly applicable for a given set of specifiers.
8161 This is for ARM $7.1.2. */
8164 bad_specifiers (object, type, virtualp, quals, inlinep, friendp, raises)
8167 int virtualp, quals, friendp, raises, inlinep;
8170 cp_error ("`%D' declared as a `virtual' %s", object, type);
8172 cp_error ("`%D' declared as an `inline' %s", object, type);
8174 cp_error ("`const' and `volatile' function specifiers on `%D' invalid in %s declaration",
8177 cp_error_at ("`%D' declared as a friend", object);
8179 cp_error_at ("`%D' declared with an exception specification", object);
8182 /* CTYPE is class type, or null if non-class.
8183 TYPE is type this FUNCTION_DECL should have, either FUNCTION_TYPE
8185 DECLARATOR is the function's name.
8186 VIRTUALP is truthvalue of whether the function is virtual or not.
8187 FLAGS are to be passed through to `grokclassfn'.
8188 QUALS are qualifiers indicating whether the function is `const'
8190 RAISES is a list of exceptions that this function can raise.
8191 CHECK is 1 if we must find this method in CTYPE, 0 if we should
8192 not look, and -1 if we should not call `grokclassfn' at all.
8194 Returns `NULL_TREE' if something goes wrong, after issuing
8195 applicable error messages. */
8198 grokfndecl (ctype, type, declarator, orig_declarator, virtualp, flags, quals,
8199 raises, check, friendp, publicp, inlinep, funcdef_flag,
8200 template_count, in_namespace)
8203 tree orig_declarator;
8205 enum overload_flags flags;
8207 int check, friendp, publicp, inlinep, funcdef_flag, template_count;
8211 int staticp = ctype && TREE_CODE (type) == FUNCTION_TYPE;
8212 int has_default_arg = 0;
8216 cname = TREE_CODE (TYPE_NAME (ctype)) == TYPE_DECL
8217 ? TYPE_IDENTIFIER (ctype) : TYPE_NAME (ctype);
8223 type = build_exception_variant (type, raises);
8226 decl = build_lang_decl (FUNCTION_DECL, declarator, type);
8227 /* Propagate volatile out from type to decl. */
8228 if (TYPE_VOLATILE (type))
8229 TREE_THIS_VOLATILE (decl) = 1;
8231 /* If this decl has namespace scope, set that up. */
8233 set_decl_namespace (decl, in_namespace, friendp);
8234 else if (publicp && ! ctype)
8235 DECL_CONTEXT (decl) = FROB_CONTEXT (current_namespace);
8237 /* `main' and builtins have implicit 'C' linkage. */
8238 if ((MAIN_NAME_P (declarator)
8239 || (IDENTIFIER_LENGTH (declarator) > 10
8240 && IDENTIFIER_POINTER (declarator)[0] == '_'
8241 && IDENTIFIER_POINTER (declarator)[1] == '_'
8242 && strncmp (IDENTIFIER_POINTER (declarator)+2, "builtin_", 8) == 0))
8243 && current_lang_name == lang_name_cplusplus
8244 && ctype == NULL_TREE
8245 /* NULL_TREE means global namespace. */
8246 && DECL_CONTEXT (decl) == NULL_TREE)
8247 DECL_LANGUAGE (decl) = lang_c;
8249 /* Should probably propagate const out from type to decl I bet (mrs). */
8252 DECL_STATIC_FUNCTION_P (decl) = 1;
8253 DECL_CONTEXT (decl) = ctype;
8257 DECL_CLASS_CONTEXT (decl) = ctype;
8259 if (ctype == NULL_TREE && DECL_MAIN_P (decl))
8261 if (processing_template_decl)
8262 error ("cannot declare `main' to be a template");
8264 error ("cannot declare `main' to be inline");
8266 error ("cannot declare `main' to be static");
8271 /* Members of anonymous types and local classes have no linkage; make
8273 if (ctype && (ANON_AGGRNAME_P (TYPE_IDENTIFIER (ctype))
8274 || hack_decl_function_context (TYPE_MAIN_DECL (ctype))))
8279 /* [basic.link]: A name with no linkage (notably, the name of a class
8280 or enumeration declared in a local scope) shall not be used to
8281 declare an entity with linkage.
8283 Only check this for public decls for now. */
8284 t = no_linkage_check (TREE_TYPE (decl));
8287 if (ANON_AGGRNAME_P (TYPE_IDENTIFIER (t)))
8289 if (DECL_LANGUAGE (decl) == lang_c)
8290 /* Allow this; it's pretty common in C. */;
8292 cp_pedwarn ("non-local function `%#D' uses anonymous type",
8296 cp_pedwarn ("non-local function `%#D' uses local type `%T'",
8301 TREE_PUBLIC (decl) = publicp;
8304 DECL_INTERFACE_KNOWN (decl) = 1;
8305 DECL_NOT_REALLY_EXTERN (decl) = 1;
8309 DECL_THIS_INLINE (decl) = DECL_INLINE (decl) = 1;
8311 DECL_EXTERNAL (decl) = 1;
8312 if (quals != NULL_TREE && TREE_CODE (type) == FUNCTION_TYPE)
8314 cp_error ("%smember function `%D' cannot have `%T' method qualifier",
8315 (ctype ? "static " : "non-"), decl, TREE_VALUE (quals));
8319 if (IDENTIFIER_OPNAME_P (DECL_NAME (decl)))
8320 grok_op_properties (decl, virtualp, check < 0);
8322 if (ctype && hack_decl_function_context (decl))
8323 DECL_NO_STATIC_CHAIN (decl) = 1;
8325 for (t = TYPE_ARG_TYPES (TREE_TYPE (decl)); t; t = TREE_CHAIN (t))
8326 if (TREE_PURPOSE (t)
8327 && TREE_CODE (TREE_PURPOSE (t)) == DEFAULT_ARG)
8329 has_default_arg = 1;
8334 && TREE_CODE (orig_declarator) == TEMPLATE_ID_EXPR)
8338 ("defining explicit specialization `%D' in friend declaration",
8342 if (PROCESSING_REAL_TEMPLATE_DECL_P ())
8344 /* Something like `template <class T> friend void f<T>()'. */
8345 cp_error ("template-id `%D' in declaration of primary template",
8351 /* A friend declaration of the form friend void f<>(). Record
8352 the information in the TEMPLATE_ID_EXPR. */
8353 SET_DECL_IMPLICIT_INSTANTIATION (decl);
8354 DECL_TEMPLATE_INFO (decl)
8355 = tree_cons (TREE_OPERAND (orig_declarator, 0),
8356 TREE_OPERAND (orig_declarator, 1),
8359 if (has_default_arg)
8361 cp_error ("default arguments are not allowed in declaration of friend template specialization `%D'",
8368 cp_error ("`inline' is not allowed in declaration of friend template specialization `%D'",
8375 if (has_default_arg)
8376 add_defarg_fn (decl);
8378 /* Plain overloading: will not be grok'd by grokclassfn. */
8379 if (! ctype && ! processing_template_decl
8380 && DECL_LANGUAGE (decl) != lang_c
8381 && (! DECL_USE_TEMPLATE (decl) || name_mangling_version < 1))
8382 set_mangled_name_for_decl (decl);
8385 /* Make the init_value nonzero so pushdecl knows this is not
8386 tentative. error_mark_node is replaced later with the BLOCK. */
8387 DECL_INITIAL (decl) = error_mark_node;
8389 /* Caller will do the rest of this. */
8393 if (flags == NO_SPECIAL && ctype && constructor_name (cname) == declarator)
8396 /* Just handle constructors here. We could do this
8397 inside the following if stmt, but I think
8398 that the code is more legible by breaking this
8399 case out. See comments below for what each of
8400 the following calls is supposed to do. */
8401 DECL_CONSTRUCTOR_P (decl) = 1;
8403 grokclassfn (ctype, decl, flags, quals);
8405 decl = check_explicit_specialization (orig_declarator, decl,
8407 2 * (funcdef_flag != 0) +
8408 4 * (friendp != 0));
8409 if (decl == error_mark_node)
8412 if ((! TYPE_FOR_JAVA (ctype) || check_java_method (decl))
8415 tmp = check_classfn (ctype, decl);
8417 if (tmp && TREE_CODE (tmp) == TEMPLATE_DECL)
8418 tmp = DECL_TEMPLATE_RESULT(tmp);
8420 if (tmp && DECL_ARTIFICIAL (tmp))
8421 cp_error ("definition of implicitly-declared `%D'", tmp);
8422 if (tmp && duplicate_decls (decl, tmp))
8425 if (! grok_ctor_properties (ctype, decl))
8432 /* Function gets the ugly name, field gets the nice one.
8433 This call may change the type of the function (because
8434 of default parameters)! */
8435 if (ctype != NULL_TREE)
8436 grokclassfn (ctype, decl, flags, quals);
8438 decl = check_explicit_specialization (orig_declarator, decl,
8440 2 * (funcdef_flag != 0) +
8441 4 * (friendp != 0));
8442 if (decl == error_mark_node)
8445 if (ctype != NULL_TREE
8446 && (! TYPE_FOR_JAVA (ctype) || check_java_method (decl))
8449 tmp = check_classfn (ctype, decl);
8451 if (tmp && TREE_CODE (tmp) == TEMPLATE_DECL)
8452 tmp = DECL_TEMPLATE_RESULT (tmp);
8454 if (tmp && DECL_STATIC_FUNCTION_P (tmp)
8455 && TREE_CODE (TREE_TYPE (decl)) == METHOD_TYPE)
8457 /* Remove the `this' parm added by grokclassfn.
8458 XXX Isn't this done in start_function, too? */
8459 revert_static_member_fn (&decl, NULL, NULL);
8460 last_function_parms = TREE_CHAIN (last_function_parms);
8462 if (tmp && DECL_ARTIFICIAL (tmp))
8463 cp_error ("definition of implicitly-declared `%D'", tmp);
8466 /* Attempt to merge the declarations. This can fail, in
8467 the case of some illegal specialization declarations. */
8468 if (!duplicate_decls (decl, tmp))
8469 cp_error ("no `%#D' member function declared in class `%T'",
8475 if (ctype == NULL_TREE || check)
8480 DECL_VIRTUAL_P (decl) = 1;
8481 if (DECL_VINDEX (decl) == NULL_TREE)
8482 DECL_VINDEX (decl) = error_mark_node;
8483 IDENTIFIER_VIRTUAL_P (DECL_NAME (decl)) = 1;
8490 grokvardecl (type, declarator, specbits_in, initialized, constp, in_namespace)
8493 RID_BIT_TYPE *specbits_in;
8499 RID_BIT_TYPE specbits;
8501 specbits = *specbits_in;
8503 if (TREE_CODE (type) == OFFSET_TYPE)
8505 /* If you declare a static member so that it
8506 can be initialized, the code will reach here. */
8507 tree basetype = TYPE_OFFSET_BASETYPE (type);
8508 type = TREE_TYPE (type);
8509 decl = build_lang_decl (VAR_DECL, declarator, type);
8510 DECL_CONTEXT (decl) = basetype;
8511 DECL_CLASS_CONTEXT (decl) = basetype;
8512 DECL_ASSEMBLER_NAME (decl) = build_static_name (basetype, declarator);
8519 context = in_namespace;
8520 else if (namespace_bindings_p () || RIDBIT_SETP (RID_EXTERN, specbits))
8521 context = current_namespace;
8523 context = NULL_TREE;
8525 if (processing_template_decl)
8526 /* If we're in a template, we need DECL_LANG_SPECIFIC so that
8527 we can call push_template_decl. */
8528 decl = build_lang_decl (VAR_DECL, declarator, type);
8530 decl = build_decl (VAR_DECL, declarator, type);
8533 set_decl_namespace (decl, context, 0);
8535 context = DECL_CONTEXT (decl);
8536 if (declarator && context && current_lang_name != lang_name_c)
8537 DECL_ASSEMBLER_NAME (decl) = build_static_name (context, declarator);
8541 set_decl_namespace (decl, in_namespace, 0);
8543 if (RIDBIT_SETP (RID_EXTERN, specbits))
8545 DECL_THIS_EXTERN (decl) = 1;
8546 DECL_EXTERNAL (decl) = !initialized;
8549 /* In class context, static means one per class,
8550 public access, and static storage. */
8551 if (DECL_CLASS_SCOPE_P (decl))
8553 TREE_PUBLIC (decl) = 1;
8554 TREE_STATIC (decl) = 1;
8555 DECL_EXTERNAL (decl) = 0;
8557 /* At top level, either `static' or no s.c. makes a definition
8558 (perhaps tentative), and absence of `static' makes it public. */
8559 else if (toplevel_bindings_p ())
8561 TREE_PUBLIC (decl) = (RIDBIT_NOTSETP (RID_STATIC, specbits)
8562 && (DECL_THIS_EXTERN (decl) || ! constp));
8563 TREE_STATIC (decl) = ! DECL_EXTERNAL (decl);
8565 /* Not at top level, only `static' makes a static definition. */
8568 TREE_STATIC (decl) = !! RIDBIT_SETP (RID_STATIC, specbits);
8569 TREE_PUBLIC (decl) = DECL_EXTERNAL (decl);
8572 if (TREE_PUBLIC (decl))
8574 /* [basic.link]: A name with no linkage (notably, the name of a class
8575 or enumeration declared in a local scope) shall not be used to
8576 declare an entity with linkage.
8578 Only check this for public decls for now. */
8579 tree t = no_linkage_check (TREE_TYPE (decl));
8582 if (ANON_AGGRNAME_P (TYPE_IDENTIFIER (t)))
8583 /* Ignore for now; `enum { foo } e' is pretty common. */;
8585 cp_pedwarn ("non-local variable `%#D' uses local type `%T'",
8593 /* Create and return a canonical pointer to member function type, for
8594 TYPE, which is a POINTER_TYPE to a METHOD_TYPE. */
8597 build_ptrmemfunc_type (type)
8603 tree unqualified_variant = NULL_TREE;
8605 /* If a canonical type already exists for this type, use it. We use
8606 this method instead of type_hash_canon, because it only does a
8607 simple equality check on the list of field members. */
8609 if ((t = TYPE_GET_PTRMEMFUNC_TYPE (type)))
8612 /* Make sure that we always have the unqualified pointer-to-member
8614 if (CP_TYPE_QUALS (type) != TYPE_UNQUALIFIED)
8616 = build_ptrmemfunc_type (TYPE_MAIN_VARIANT (type));
8618 u = make_aggr_type (UNION_TYPE);
8619 SET_IS_AGGR_TYPE (u, 0);
8620 fields[0] = build_lang_decl (FIELD_DECL, pfn_identifier, type);
8621 fields[1] = build_lang_decl (FIELD_DECL, delta2_identifier,
8623 finish_builtin_type (u, "__ptrmemfunc_type", fields, 1, ptr_type_node);
8624 TYPE_NAME (u) = NULL_TREE;
8626 t = make_aggr_type (RECORD_TYPE);
8628 /* Let the front-end know this is a pointer to member function... */
8629 TYPE_PTRMEMFUNC_FLAG (t) = 1;
8630 /* ... and not really an aggregate. */
8631 SET_IS_AGGR_TYPE (t, 0);
8633 fields[0] = build_lang_decl (FIELD_DECL, delta_identifier,
8635 fields[1] = build_lang_decl (FIELD_DECL, index_identifier,
8637 fields[2] = build_lang_decl (FIELD_DECL, pfn_or_delta2_identifier, u);
8638 finish_builtin_type (t, "__ptrmemfunc_type", fields, 2, ptr_type_node);
8640 /* Zap out the name so that the back-end will give us the debugging
8641 information for this anonymous RECORD_TYPE. */
8642 TYPE_NAME (t) = NULL_TREE;
8644 /* If this is not the unqualified form of this pointer-to-member
8645 type, set the TYPE_MAIN_VARIANT for this type to be the
8646 unqualified type. Since they are actually RECORD_TYPEs that are
8647 not variants of each other, we must do this manually. */
8648 if (CP_TYPE_QUALS (type) != TYPE_UNQUALIFIED)
8650 t = build_qualified_type (t, CP_TYPE_QUALS (type));
8651 TYPE_MAIN_VARIANT (t) = unqualified_variant;
8652 TYPE_NEXT_VARIANT (t) = TYPE_NEXT_VARIANT (unqualified_variant);
8653 TYPE_NEXT_VARIANT (unqualified_variant) = t;
8656 /* Cache this pointer-to-member type so that we can find it again
8658 TYPE_SET_PTRMEMFUNC_TYPE (type, t);
8660 /* Seems to be wanted. */
8661 CLASSTYPE_GOT_SEMICOLON (t) = 1;
8666 /* DECL is a VAR_DECL defined in-class, whose TYPE is also given.
8667 Check to see that the definition is valid. Issue appropriate error
8668 messages. Return 1 if the definition is particularly bad, or 0
8672 check_static_variable_definition (decl, type)
8676 /* Motion 10 at San Diego: If a static const integral data member is
8677 initialized with an integral constant expression, the initializer
8678 may appear either in the declaration (within the class), or in
8679 the definition, but not both. If it appears in the class, the
8680 member is a member constant. The file-scope definition is always
8682 if (CLASS_TYPE_P (type) || TREE_CODE (type) == REFERENCE_TYPE)
8684 cp_error ("in-class initialization of static data member of non-integral type `%T'",
8686 /* If we just return the declaration, crashes will sometimes
8687 occur. We therefore return void_type_node, as if this was a
8688 friend declaration, to cause callers to completely ignore
8689 this declaration. */
8692 else if (!CP_TYPE_CONST_P (type))
8693 cp_error ("ANSI C++ forbids in-class initialization of non-const static member `%D'",
8695 else if (pedantic && !INTEGRAL_TYPE_P (type))
8696 cp_pedwarn ("ANSI C++ forbids initialization of member constant `%D' of non-integral type `%T'", decl, type);
8701 /* Given the SIZE (i.e., number of elements) in an array, compute an
8702 appropriate index type for the array. If non-NULL, NAME is the
8703 name of the thing being declared. */
8706 compute_array_index_type (name, size)
8712 /* The size might be the result of a cast. */
8713 STRIP_TYPE_NOPS (size);
8715 /* It might be a const variable or enumeration constant. */
8716 if (TREE_READONLY_DECL_P (size))
8717 size = decl_constant_value (size);
8719 /* If this involves a template parameter, it will be a constant at
8720 instantiation time, but we don't know what the value is yet.
8721 Even if no template parameters are involved, we may an expression
8722 that is not a constant; we don't even simplify `1 + 2' when
8723 processing a template. */
8724 if (processing_template_decl)
8726 /* Resolve a qualified reference to an enumerator or static
8727 const data member of ours. */
8728 if (TREE_CODE (size) == SCOPE_REF
8729 && TREE_OPERAND (size, 0) == current_class_type)
8731 tree t = lookup_field (current_class_type,
8732 TREE_OPERAND (size, 1), 0, 0);
8737 return build_index_type (build_min (MINUS_EXPR, sizetype,
8738 size, integer_one_node));
8741 /* The array bound must be an integer type. */
8742 if (TREE_CODE (TREE_TYPE (size)) != INTEGER_TYPE
8743 && TREE_CODE (TREE_TYPE (size)) != ENUMERAL_TYPE
8744 && TREE_CODE (TREE_TYPE (size)) != BOOLEAN_TYPE)
8747 cp_error ("size of array `%D' has non-integer type", name);
8749 cp_error ("size of array has non-integer type");
8750 size = integer_one_node;
8753 /* Normally, the array-bound will be a constant. */
8754 if (TREE_CONSTANT (size))
8756 /* Check to see if the array bound overflowed. Make that an
8757 error, no matter how generous we're being. */
8758 int old_flag_pedantic_errors = flag_pedantic_errors;
8759 int old_pedantic = pedantic;
8760 pedantic = flag_pedantic_errors = 1;
8761 constant_expression_warning (size);
8762 pedantic = old_pedantic;
8763 flag_pedantic_errors = old_flag_pedantic_errors;
8765 /* An array must have a positive number of elements. */
8766 if (INT_CST_LT (size, integer_zero_node))
8769 cp_error ("size of array `%D' is negative", name);
8771 cp_error ("size of array is negative");
8772 size = integer_one_node;
8774 /* Except that an extension we allow zero-sized arrays. We
8775 always allow them in system headers because glibc uses
8777 else if (integer_zerop (size) && pedantic && !in_system_header)
8780 cp_pedwarn ("ANSI C++ forbids zero-size array `%D'", name);
8782 cp_pedwarn ("ANSI C++ forbids zero-size array");
8786 /* Compute the index of the largest element in the array. It is
8787 one less than the number of elements in the array. */
8789 = fold (build_binary_op (MINUS_EXPR,
8790 cp_convert (ssizetype, size),
8791 cp_convert (ssizetype,
8792 integer_one_node)));
8794 /* Check for variable-sized arrays. We allow such things as an
8795 extension, even though they are not allowed in ANSI/ISO C++. */
8796 if (!TREE_CONSTANT (itype))
8801 cp_pedwarn ("ANSI C++ forbids variable-size array `%D'",
8804 cp_pedwarn ("ANSI C++ forbids variable-size array");
8807 /* Create a variable-sized array index type. */
8808 itype = variable_size (itype);
8810 /* Make sure that there was no overflow when creating to a signed
8811 index type. (For example, on a 32-bit machine, an array with
8812 size 2^32 - 1 is too big.) */
8813 else if (TREE_OVERFLOW (itype))
8815 error ("overflow in array dimension");
8816 TREE_OVERFLOW (itype) = 0;
8819 /* Create and return the appropriate index type. */
8820 return build_index_type (itype);
8823 /* Returns an ARRAY_TYPE for an array with SIZE elements of the
8824 indicated TYPE. If non-NULL, NAME is the NAME of the declaration
8828 create_array_type_for_decl (name, type, size)
8833 tree itype = NULL_TREE;
8834 const char* error_msg;
8836 /* If things have already gone awry, bail now. */
8837 if (type == error_mark_node || size == error_mark_node)
8838 return error_mark_node;
8840 /* Assume that everything will go OK. */
8843 /* There are some types which cannot be array elements. */
8844 switch (TREE_CODE (type))
8847 error_msg = "array of void";
8851 error_msg = "array of functions";
8854 case REFERENCE_TYPE:
8855 error_msg = "array of references";
8859 error_msg = "array of data members";
8863 error_msg = "array of function members";
8870 /* If something went wrong, issue an error-message and return. */
8874 cp_error ("declaration of `%D' as %s", name, error_msg);
8876 cp_error ("creating %s", error_msg);
8878 return error_mark_node;
8883 The constant expressions that specify the bounds of the arrays
8884 can be omitted only for the first member of the sequence. */
8885 if (TREE_CODE (type) == ARRAY_TYPE && !TYPE_DOMAIN (type))
8887 cp_error ("declaration of `%D' as multidimensional array",
8889 cp_error ("must have bounds for all dimensions except the first");
8891 return error_mark_node;
8894 /* Figure out the index type for the array. */
8896 itype = compute_array_index_type (name, size);
8898 return build_cplus_array_type (type, itype);
8901 /* Given declspecs and a declarator,
8902 determine the name and type of the object declared
8903 and construct a ..._DECL node for it.
8904 (In one case we can return a ..._TYPE node instead.
8905 For invalid input we sometimes return 0.)
8907 DECLSPECS is a chain of tree_list nodes whose value fields
8908 are the storage classes and type specifiers.
8910 DECL_CONTEXT says which syntactic context this declaration is in:
8911 NORMAL for most contexts. Make a VAR_DECL or FUNCTION_DECL or TYPE_DECL.
8912 FUNCDEF for a function definition. Like NORMAL but a few different
8913 error messages in each case. Return value may be zero meaning
8914 this definition is too screwy to try to parse.
8915 MEMFUNCDEF for a function definition. Like FUNCDEF but prepares to
8916 handle member functions (which have FIELD context).
8917 Return value may be zero meaning this definition is too screwy to
8919 PARM for a parameter declaration (either within a function prototype
8920 or before a function body). Make a PARM_DECL, or return void_type_node.
8921 CATCHPARM for a parameter declaration before a catch clause.
8922 TYPENAME if for a typename (in a cast or sizeof).
8923 Don't make a DECL node; just return the ..._TYPE node.
8924 FIELD for a struct or union field; make a FIELD_DECL.
8925 BITFIELD for a field with specified width.
8926 INITIALIZED is 1 if the decl has an initializer.
8928 ATTRLIST is a TREE_LIST node with prefix attributes in TREE_VALUE and
8929 normal attributes in TREE_PURPOSE, or NULL_TREE.
8931 In the TYPENAME case, DECLARATOR is really an absolute declarator.
8932 It may also be so in the PARM case, for a prototype where the
8933 argument type is specified but not the name.
8935 This function is where the complicated C meanings of `static'
8936 and `extern' are interpreted.
8938 For C++, if there is any monkey business to do, the function which
8939 calls this one must do it, i.e., prepending instance variables,
8940 renaming overloaded function names, etc.
8942 Note that for this C++, it is an error to define a method within a class
8943 which does not belong to that class.
8945 Except in the case where SCOPE_REFs are implicitly known (such as
8946 methods within a class being redundantly qualified),
8947 declarations which involve SCOPE_REFs are returned as SCOPE_REFs
8948 (class_name::decl_name). The caller must also deal with this.
8950 If a constructor or destructor is seen, and the context is FIELD,
8951 then the type gains the attribute TREE_HAS_x. If such a declaration
8952 is erroneous, NULL_TREE is returned.
8954 QUALS is used only for FUNCDEF and MEMFUNCDEF cases. For a member
8955 function, these are the qualifiers to give to the `this' pointer. We
8956 apply TYPE_QUAL_RESTRICT to the this ptr, not the object.
8958 May return void_type_node if the declarator turned out to be a friend.
8959 See grokfield for details. */
8961 enum return_types { return_normal, return_ctor, return_dtor, return_conversion };
8964 grokdeclarator (declarator, declspecs, decl_context, initialized, attrlist)
8967 enum decl_context decl_context;
8971 RID_BIT_TYPE specbits;
8974 tree type = NULL_TREE;
8980 int virtualp, explicitp, friendp, inlinep, staticp;
8981 int explicit_int = 0;
8982 int explicit_char = 0;
8983 int defaulted_int = 0;
8984 tree typedef_decl = NULL_TREE;
8986 tree typedef_type = NULL_TREE;
8987 int funcdef_flag = 0;
8988 enum tree_code innermost_code = ERROR_MARK;
8991 /* See the code below that used this. */
8992 tree decl_machine_attr = NULL_TREE;
8994 /* Set this to error_mark_node for FIELD_DECLs we could not handle properly.
8995 All FIELD_DECLs we build here have `init' put into their DECL_INITIAL. */
8996 tree init = NULL_TREE;
8998 /* Keep track of what sort of function is being processed
8999 so that we can warn about default return values, or explicit
9000 return values which do not match prescribed defaults. */
9001 enum return_types return_type = return_normal;
9003 tree dname = NULL_TREE;
9004 tree ctype = current_class_type;
9005 tree ctor_return_type = NULL_TREE;
9006 enum overload_flags flags = NO_SPECIAL;
9007 tree quals = NULL_TREE;
9008 tree raises = NULL_TREE;
9009 int template_count = 0;
9010 tree in_namespace = NULL_TREE;
9014 RIDBIT_RESET_ALL (specbits);
9015 if (decl_context == FUNCDEF)
9016 funcdef_flag = 1, decl_context = NORMAL;
9017 else if (decl_context == MEMFUNCDEF)
9018 funcdef_flag = -1, decl_context = FIELD;
9019 else if (decl_context == BITFIELD)
9020 bitfield = 1, decl_context = FIELD;
9022 /* Look inside a declarator for the name being declared
9023 and get it as a string, for an error message. */
9025 tree *next = &declarator;
9029 while (next && *next)
9032 switch (TREE_CODE (decl))
9035 /* For attributes. */
9036 next = &TREE_VALUE (decl);
9041 next = &TREE_OPERAND (decl, 0);
9044 case BIT_NOT_EXPR: /* For C++ destructors! */
9046 tree name = TREE_OPERAND (decl, 0);
9047 tree rename = NULL_TREE;
9049 my_friendly_assert (flags == NO_SPECIAL, 152);
9051 return_type = return_dtor;
9052 if (TREE_CODE (name) == TYPE_DECL)
9053 TREE_OPERAND (decl, 0) = name = constructor_name (name);
9054 my_friendly_assert (TREE_CODE (name) == IDENTIFIER_NODE, 153);
9055 if (ctype == NULL_TREE)
9057 if (current_class_type == NULL_TREE)
9059 error ("destructors must be member functions");
9064 tree t = constructor_name (current_class_name);
9071 tree t = constructor_name (ctype);
9078 cp_error ("destructor `%T' must match class name `%T'",
9080 TREE_OPERAND (decl, 0) = rename;
9086 case ADDR_EXPR: /* C++ reference declaration */
9091 innermost_code = TREE_CODE (decl);
9092 next = &TREE_OPERAND (decl, 0);
9096 if (parmlist_is_exprlist (CALL_DECLARATOR_PARMS (decl)))
9098 /* This is actually a variable declaration using
9099 constructor syntax. We need to call start_decl and
9100 cp_finish_decl so we can get the variable
9103 tree attributes, prefix_attributes;
9105 *next = TREE_OPERAND (decl, 0);
9106 init = CALL_DECLARATOR_PARMS (decl);
9110 attributes = TREE_PURPOSE (attrlist);
9111 prefix_attributes = TREE_VALUE (attrlist);
9115 attributes = NULL_TREE;
9116 prefix_attributes = NULL_TREE;
9119 decl = start_decl (declarator, declspecs, 1,
9120 attributes, prefix_attributes);
9123 /* Look for __unused__ attribute */
9124 if (TREE_USED (TREE_TYPE (decl)))
9125 TREE_USED (decl) = 1;
9126 finish_decl (decl, init, NULL_TREE);
9129 cp_error ("invalid declarator");
9132 innermost_code = TREE_CODE (decl);
9133 if (decl_context == FIELD && ctype == NULL_TREE)
9134 ctype = current_class_type;
9136 && TREE_OPERAND (decl, 0)
9137 && (TREE_CODE (TREE_OPERAND (decl, 0)) == TYPE_DECL
9138 && ((DECL_NAME (TREE_OPERAND (decl, 0))
9139 == constructor_name_full (ctype))
9140 || (DECL_NAME (TREE_OPERAND (decl, 0))
9141 == constructor_name (ctype)))))
9142 TREE_OPERAND (decl, 0) = constructor_name (ctype);
9143 next = &TREE_OPERAND (decl, 0);
9145 if (ctype != NULL_TREE
9146 && decl != NULL_TREE && flags != DTOR_FLAG
9147 && decl == constructor_name (ctype))
9149 return_type = return_ctor;
9150 ctor_return_type = ctype;
9155 case TEMPLATE_ID_EXPR:
9157 tree fns = TREE_OPERAND (decl, 0);
9159 if (TREE_CODE (fns) == LOOKUP_EXPR)
9160 fns = TREE_OPERAND (fns, 0);
9163 if (TREE_CODE (dname) == COMPONENT_REF)
9164 dname = TREE_OPERAND (dname, 1);
9165 if (TREE_CODE (dname) != IDENTIFIER_NODE)
9167 my_friendly_assert (is_overloaded_fn (dname),
9169 dname = DECL_NAME (get_first_fn (dname));
9174 case IDENTIFIER_NODE:
9175 if (TREE_CODE (decl) == IDENTIFIER_NODE)
9182 cp_error ("declarator-id missing; using reserved word `%D'",
9184 name = IDENTIFIER_POINTER (dname);
9186 if (! IDENTIFIER_OPNAME_P (dname)
9187 /* GNU/Linux headers use '__op'. Arrgh. */
9188 || (IDENTIFIER_TYPENAME_P (dname) && ! TREE_TYPE (dname)))
9189 name = IDENTIFIER_POINTER (dname);
9192 if (IDENTIFIER_TYPENAME_P (dname))
9194 my_friendly_assert (flags == NO_SPECIAL, 154);
9195 flags = TYPENAME_FLAG;
9196 ctor_return_type = TREE_TYPE (dname);
9197 return_type = return_conversion;
9199 name = operator_name_string (dname);
9206 /* Perform error checking, and decide on a ctype. */
9207 tree cname = TREE_OPERAND (decl, 0);
9208 if (cname == NULL_TREE)
9210 else if (TREE_CODE (cname) == NAMESPACE_DECL)
9213 in_namespace = TREE_OPERAND (decl, 0);
9214 TREE_OPERAND (decl, 0) = NULL_TREE;
9216 else if (! is_aggr_type (cname, 1))
9217 TREE_OPERAND (decl, 0) = NULL_TREE;
9218 /* Must test TREE_OPERAND (decl, 1), in case user gives
9219 us `typedef (class::memfunc)(int); memfunc *memfuncptr;' */
9220 else if (TREE_OPERAND (decl, 1)
9221 && TREE_CODE (TREE_OPERAND (decl, 1)) == INDIRECT_REF)
9223 else if (TREE_CODE (cname) == TEMPLATE_TYPE_PARM
9224 || TREE_CODE (cname) == TEMPLATE_TEMPLATE_PARM)
9226 cp_error ("`%T::%D' is not a valid declarator", cname,
9227 TREE_OPERAND (decl, 1));
9228 cp_error (" perhaps you want `typename %T::%D' to make it a type",
9229 cname, TREE_OPERAND (decl, 1));
9230 return void_type_node;
9232 else if (ctype == NULL_TREE)
9234 else if (TREE_COMPLEXITY (decl) == current_class_depth)
9235 TREE_OPERAND (decl, 0) = ctype;
9238 if (! UNIQUELY_DERIVED_FROM_P (cname, ctype))
9240 cp_error ("type `%T' is not derived from type `%T'",
9242 TREE_OPERAND (decl, 0) = NULL_TREE;
9248 if (ctype && TREE_CODE (TREE_OPERAND (decl, 1)) == TYPE_DECL
9249 && ((DECL_NAME (TREE_OPERAND (decl, 1))
9250 == constructor_name_full (ctype))
9251 || (DECL_NAME (TREE_OPERAND (decl, 1))
9252 == constructor_name (ctype))))
9253 TREE_OPERAND (decl, 1) = constructor_name (ctype);
9254 next = &TREE_OPERAND (decl, 1);
9258 if (TREE_CODE (decl) == IDENTIFIER_NODE
9259 && constructor_name (ctype) == decl)
9261 return_type = return_ctor;
9262 ctor_return_type = ctype;
9264 else if (TREE_CODE (decl) == BIT_NOT_EXPR
9265 && TREE_CODE (TREE_OPERAND (decl, 0)) == IDENTIFIER_NODE
9266 && (constructor_name (ctype) == TREE_OPERAND (decl, 0)
9267 || constructor_name_full (ctype) == TREE_OPERAND (decl, 0)))
9269 return_type = return_dtor;
9270 ctor_return_type = ctype;
9272 TREE_OPERAND (decl, 0) = constructor_name (ctype);
9273 next = &TREE_OPERAND (decl, 0);
9284 /* Parse error puts this typespec where
9285 a declarator should go. */
9286 cp_error ("`%T' specified as declarator-id", DECL_NAME (decl));
9287 if (TREE_TYPE (decl) == current_class_type)
9288 cp_error (" perhaps you want `%T' for a constructor",
9289 current_class_name);
9290 dname = DECL_NAME (decl);
9291 name = IDENTIFIER_POINTER (dname);
9293 /* Avoid giving two errors for this. */
9294 IDENTIFIER_CLASS_VALUE (dname) = NULL_TREE;
9296 declspecs = temp_tree_cons (NULL_TREE, integer_type_node,
9303 cp_compiler_error ("`%D' as declarator", decl);
9304 return 0; /* We used to do a 155 abort here. */
9309 /* A function definition's declarator must have the form of
9310 a function declarator. */
9312 if (funcdef_flag && innermost_code != CALL_EXPR)
9315 if (((dname && IDENTIFIER_OPNAME_P (dname)) || flags == TYPENAME_FLAG)
9316 && innermost_code != CALL_EXPR
9317 && ! (ctype && declspecs == NULL_TREE))
9319 cp_error ("declaration of `%D' as non-function", dname);
9320 return void_type_node;
9323 /* Anything declared one level down from the top level
9324 must be one of the parameters of a function
9325 (because the body is at least two levels down). */
9327 /* This heuristic cannot be applied to C++ nodes! Fixed, however,
9328 by not allowing C++ class definitions to specify their parameters
9329 with xdecls (must be spec.d in the parmlist).
9331 Since we now wait to push a class scope until we are sure that
9332 we are in a legitimate method context, we must set oldcname
9333 explicitly (since current_class_name is not yet alive).
9335 We also want to avoid calling this a PARM if it is in a namespace. */
9337 if (decl_context == NORMAL && !toplevel_bindings_p ())
9339 struct binding_level *b = current_binding_level;
9340 current_binding_level = b->level_chain;
9341 if (current_binding_level != 0 && toplevel_bindings_p ())
9342 decl_context = PARM;
9343 current_binding_level = b;
9347 name = decl_context == PARM ? "parameter" : "type name";
9349 /* Look through the decl specs and record which ones appear.
9350 Some typespecs are defined as built-in typenames.
9351 Others, the ones that are modifiers of other types,
9352 are represented by bits in SPECBITS: set the bits for
9353 the modifiers that appear. Storage class keywords are also in SPECBITS.
9355 If there is a typedef name or a type, store the type in TYPE.
9356 This includes builtin typedefs such as `int'.
9358 Set EXPLICIT_INT if the type is `int' or `char' and did not
9359 come from a user typedef.
9361 Set LONGLONG if `long' is mentioned twice.
9363 For C++, constructors and destructors have their own fast treatment. */
9365 for (spec = declspecs; spec; spec = TREE_CHAIN (spec))
9370 /* Certain parse errors slip through. For example,
9371 `int class;' is not caught by the parser. Try
9372 weakly to recover here. */
9373 if (TREE_CODE (spec) != TREE_LIST)
9376 id = TREE_VALUE (spec);
9378 if (TREE_CODE (id) == IDENTIFIER_NODE)
9380 if (id == ridpointers[(int) RID_INT]
9381 || id == ridpointers[(int) RID_CHAR]
9382 || id == ridpointers[(int) RID_BOOL]
9383 || id == ridpointers[(int) RID_WCHAR])
9387 if (id == ridpointers[(int) RID_BOOL])
9388 error ("`bool' is now a keyword");
9390 cp_error ("extraneous `%T' ignored", id);
9394 if (id == ridpointers[(int) RID_INT])
9396 else if (id == ridpointers[(int) RID_CHAR])
9398 type = TREE_TYPE (IDENTIFIER_GLOBAL_VALUE (id));
9402 /* C++ aggregate types. */
9403 if (IDENTIFIER_HAS_TYPE_VALUE (id))
9406 cp_error ("multiple declarations `%T' and `%T'", type, id);
9408 type = IDENTIFIER_TYPE_VALUE (id);
9412 for (i = (int) RID_FIRST_MODIFIER; i <= (int) RID_LAST_MODIFIER; i++)
9414 if (ridpointers[i] == id)
9416 if (i == (int) RID_LONG && RIDBIT_SETP (i, specbits))
9418 if (pedantic && ! in_system_header && warn_long_long)
9419 pedwarn ("ANSI C++ does not support `long long'");
9421 error ("`long long long' is too long for GCC");
9425 else if (RIDBIT_SETP (i, specbits))
9426 pedwarn ("duplicate `%s'", IDENTIFIER_POINTER (id));
9427 RIDBIT_SET (i, specbits);
9432 /* C++ aggregate types. */
9433 else if (TREE_CODE (id) == TYPE_DECL || TREE_CODE (id) == TEMPLATE_DECL)
9436 cp_error ("multiple declarations `%T' and `%T'", type,
9440 type = TREE_TYPE (id);
9441 TREE_VALUE (spec) = type;
9446 error ("two or more data types in declaration of `%s'", name);
9447 else if (TREE_CODE (id) == IDENTIFIER_NODE)
9449 register tree t = lookup_name (id, 1);
9450 if (!t || TREE_CODE (t) != TYPE_DECL)
9451 error ("`%s' fails to be a typedef or built in type",
9452 IDENTIFIER_POINTER (id));
9455 type = TREE_TYPE (t);
9457 /* See the code below that used this. */
9458 decl_machine_attr = DECL_MACHINE_ATTRIBUTES (id);
9463 else if (id != error_mark_node)
9464 /* Can't change CLASS nodes into RECORD nodes here! */
9470 typedef_type = type;
9472 /* No type at all: default to `int', and set DEFAULTED_INT
9473 because it was not a user-defined typedef. */
9475 if (type == NULL_TREE
9476 && (RIDBIT_SETP (RID_SIGNED, specbits)
9477 || RIDBIT_SETP (RID_UNSIGNED, specbits)
9478 || RIDBIT_SETP (RID_LONG, specbits)
9479 || RIDBIT_SETP (RID_SHORT, specbits)))
9481 /* These imply 'int'. */
9482 type = integer_type_node;
9486 if (type == NULL_TREE)
9489 if (return_type == return_dtor)
9490 type = void_type_node;
9491 else if (return_type == return_ctor)
9492 type = build_pointer_type (ctor_return_type);
9493 else if (return_type == return_conversion)
9494 type = ctor_return_type;
9497 /* We handle `main' specially here, because 'main () { }' is so
9498 common. With no options, it is allowed. With -Wreturn-type,
9499 it is a warning. It is only an error with -pedantic-errors. */
9500 int is_main = (funcdef_flag
9501 && MAIN_NAME_P (dname)
9502 && ctype == NULL_TREE
9503 && in_namespace == NULL_TREE
9504 && current_namespace == global_namespace);
9506 if (in_system_header || flag_ms_extensions)
9507 /* Allow it, sigh. */;
9508 else if (pedantic || ! is_main)
9509 cp_pedwarn ("ANSI C++ forbids declaration of `%s' with no type",
9511 else if (warn_return_type)
9512 cp_warning ("ANSI C++ forbids declaration of `%s' with no type",
9515 type = integer_type_node;
9518 else if (return_type == return_dtor)
9520 error ("return type specification for destructor invalid");
9521 type = void_type_node;
9523 else if (return_type == return_ctor)
9525 error ("return type specification for constructor invalid");
9526 type = build_pointer_type (ctor_return_type);
9528 else if (return_type == return_conversion)
9530 if (!same_type_p (type, ctor_return_type))
9531 cp_error ("operator `%T' declared to return `%T'",
9532 ctor_return_type, type);
9534 cp_pedwarn ("return type specified for `operator %T'",
9537 type = ctor_return_type;
9542 /* Now process the modifiers that were specified
9543 and check for invalid combinations. */
9545 /* Long double is a special combination. */
9547 if (RIDBIT_SETP (RID_LONG, specbits)
9548 && TYPE_MAIN_VARIANT (type) == double_type_node)
9550 RIDBIT_RESET (RID_LONG, specbits);
9551 type = build_qualified_type (long_double_type_node,
9552 CP_TYPE_QUALS (type));
9555 /* Check all other uses of type modifiers. */
9557 if (RIDBIT_SETP (RID_UNSIGNED, specbits)
9558 || RIDBIT_SETP (RID_SIGNED, specbits)
9559 || RIDBIT_SETP (RID_LONG, specbits)
9560 || RIDBIT_SETP (RID_SHORT, specbits))
9564 if (TREE_CODE (type) == REAL_TYPE)
9565 error ("short, signed or unsigned invalid for `%s'", name);
9566 else if (TREE_CODE (type) != INTEGER_TYPE)
9567 error ("long, short, signed or unsigned invalid for `%s'", name);
9568 else if (RIDBIT_SETP (RID_LONG, specbits)
9569 && RIDBIT_SETP (RID_SHORT, specbits))
9570 error ("long and short specified together for `%s'", name);
9571 else if ((RIDBIT_SETP (RID_LONG, specbits)
9572 || RIDBIT_SETP (RID_SHORT, specbits))
9574 error ("long or short specified with char for `%s'", name);
9575 else if ((RIDBIT_SETP (RID_LONG, specbits)
9576 || RIDBIT_SETP (RID_SHORT, specbits))
9577 && TREE_CODE (type) == REAL_TYPE)
9578 error ("long or short specified with floating type for `%s'", name);
9579 else if (RIDBIT_SETP (RID_SIGNED, specbits)
9580 && RIDBIT_SETP (RID_UNSIGNED, specbits))
9581 error ("signed and unsigned given together for `%s'", name);
9585 if (!explicit_int && !defaulted_int && !explicit_char && pedantic)
9587 pedwarn ("long, short, signed or unsigned used invalidly for `%s'",
9589 if (flag_pedantic_errors)
9594 /* Discard the type modifiers if they are invalid. */
9597 RIDBIT_RESET (RID_UNSIGNED, specbits);
9598 RIDBIT_RESET (RID_SIGNED, specbits);
9599 RIDBIT_RESET (RID_LONG, specbits);
9600 RIDBIT_RESET (RID_SHORT, specbits);
9605 if (RIDBIT_SETP (RID_COMPLEX, specbits)
9606 && TREE_CODE (type) != INTEGER_TYPE && TREE_CODE (type) != REAL_TYPE)
9608 error ("complex invalid for `%s'", name);
9609 RIDBIT_RESET (RID_COMPLEX, specbits);
9612 /* Decide whether an integer type is signed or not.
9613 Optionally treat bitfields as signed by default. */
9614 if (RIDBIT_SETP (RID_UNSIGNED, specbits)
9617 It is implementation-defined whether a plain (neither
9618 explicitly signed or unsigned) char, short, int, or long
9619 bit-field is signed or unsigned.
9621 Naturally, we extend this to long long as well. Note that
9622 this does not include wchar_t. */
9623 || (bitfield && !flag_signed_bitfields
9624 && RIDBIT_NOTSETP (RID_SIGNED, specbits)
9625 /* A typedef for plain `int' without `signed' can be
9626 controlled just like plain `int', but a typedef for
9627 `signed int' cannot be so controlled. */
9629 && C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl))
9630 && (TREE_CODE (type) == INTEGER_TYPE
9631 || TREE_CODE (type) == CHAR_TYPE)
9632 && !same_type_p (TYPE_MAIN_VARIANT (type), wchar_type_node)))
9635 type = long_long_unsigned_type_node;
9636 else if (RIDBIT_SETP (RID_LONG, specbits))
9637 type = long_unsigned_type_node;
9638 else if (RIDBIT_SETP (RID_SHORT, specbits))
9639 type = short_unsigned_type_node;
9640 else if (type == char_type_node)
9641 type = unsigned_char_type_node;
9642 else if (typedef_decl)
9643 type = unsigned_type (type);
9645 type = unsigned_type_node;
9647 else if (RIDBIT_SETP (RID_SIGNED, specbits)
9648 && type == char_type_node)
9649 type = signed_char_type_node;
9651 type = long_long_integer_type_node;
9652 else if (RIDBIT_SETP (RID_LONG, specbits))
9653 type = long_integer_type_node;
9654 else if (RIDBIT_SETP (RID_SHORT, specbits))
9655 type = short_integer_type_node;
9657 if (RIDBIT_SETP (RID_COMPLEX, specbits))
9659 /* If we just have "complex", it is equivalent to
9660 "complex double", but if any modifiers at all are specified it is
9661 the complex form of TYPE. E.g, "complex short" is
9662 "complex short int". */
9664 if (defaulted_int && ! longlong
9665 && ! (RIDBIT_SETP (RID_LONG, specbits)
9666 || RIDBIT_SETP (RID_SHORT, specbits)
9667 || RIDBIT_SETP (RID_SIGNED, specbits)
9668 || RIDBIT_SETP (RID_UNSIGNED, specbits)))
9669 type = complex_double_type_node;
9670 else if (type == integer_type_node)
9671 type = complex_integer_type_node;
9672 else if (type == float_type_node)
9673 type = complex_float_type_node;
9674 else if (type == double_type_node)
9675 type = complex_double_type_node;
9676 else if (type == long_double_type_node)
9677 type = complex_long_double_type_node;
9679 type = build_complex_type (type);
9682 if (return_type == return_conversion
9683 && (RIDBIT_SETP (RID_CONST, specbits)
9684 || RIDBIT_SETP (RID_VOLATILE, specbits)
9685 || RIDBIT_SETP (RID_RESTRICT, specbits)))
9686 cp_error ("qualifiers are not allowed on declaration of `operator %T'",
9689 /* Set CONSTP if this declaration is `const', whether by
9690 explicit specification or via a typedef.
9691 Likewise for VOLATILEP. */
9693 constp = !! RIDBIT_SETP (RID_CONST, specbits) + CP_TYPE_CONST_P (type);
9695 !! RIDBIT_SETP (RID_RESTRICT, specbits) + CP_TYPE_RESTRICT_P (type);
9697 !! RIDBIT_SETP (RID_VOLATILE, specbits) + CP_TYPE_VOLATILE_P (type);
9698 type_quals = ((constp ? TYPE_QUAL_CONST : 0)
9699 | (restrictp ? TYPE_QUAL_RESTRICT : 0)
9700 | (volatilep ? TYPE_QUAL_VOLATILE : 0));
9701 type = cp_build_qualified_type (type, type_quals);
9703 inlinep = !! RIDBIT_SETP (RID_INLINE, specbits);
9704 virtualp = RIDBIT_SETP (RID_VIRTUAL, specbits);
9705 RIDBIT_RESET (RID_VIRTUAL, specbits);
9706 explicitp = RIDBIT_SETP (RID_EXPLICIT, specbits) != 0;
9707 RIDBIT_RESET (RID_EXPLICIT, specbits);
9709 if (RIDBIT_SETP (RID_STATIC, specbits))
9710 staticp = 1 + (decl_context == FIELD);
9712 if (virtualp && staticp == 2)
9714 cp_error ("member `%D' cannot be declared both virtual and static",
9718 friendp = RIDBIT_SETP (RID_FRIEND, specbits);
9719 RIDBIT_RESET (RID_FRIEND, specbits);
9721 /* Warn if two storage classes are given. Default to `auto'. */
9723 if (RIDBIT_ANY_SET (specbits))
9725 if (RIDBIT_SETP (RID_STATIC, specbits)) nclasses++;
9726 if (RIDBIT_SETP (RID_EXTERN, specbits)) nclasses++;
9727 if (decl_context == PARM && nclasses > 0)
9728 error ("storage class specifiers invalid in parameter declarations");
9729 if (RIDBIT_SETP (RID_TYPEDEF, specbits))
9731 if (decl_context == PARM)
9732 error ("typedef declaration invalid in parameter declaration");
9735 if (RIDBIT_SETP (RID_AUTO, specbits)) nclasses++;
9736 if (RIDBIT_SETP (RID_REGISTER, specbits)) nclasses++;
9739 /* Give error if `virtual' is used outside of class declaration. */
9741 && (current_class_name == NULL_TREE || decl_context != FIELD))
9743 error ("virtual outside class declaration");
9747 /* Static anonymous unions are dealt with here. */
9748 if (staticp && decl_context == TYPENAME
9749 && TREE_CODE (declspecs) == TREE_LIST
9750 && ANON_AGGR_TYPE_P (TREE_VALUE (declspecs)))
9751 decl_context = FIELD;
9753 /* Warn about storage classes that are invalid for certain
9754 kinds of declarations (parameters, typenames, etc.). */
9757 error ("multiple storage classes in declaration of `%s'", name);
9758 else if (decl_context != NORMAL && nclasses > 0)
9760 if ((decl_context == PARM || decl_context == CATCHPARM)
9761 && (RIDBIT_SETP (RID_REGISTER, specbits)
9762 || RIDBIT_SETP (RID_AUTO, specbits)))
9764 else if (RIDBIT_SETP (RID_TYPEDEF, specbits))
9766 else if (decl_context == FIELD
9767 /* C++ allows static class elements */
9768 && RIDBIT_SETP (RID_STATIC, specbits))
9769 /* C++ also allows inlines and signed and unsigned elements,
9770 but in those cases we don't come in here. */
9774 if (decl_context == FIELD)
9776 tree tmp = NULL_TREE;
9777 register int op = 0;
9781 /* Avoid trying to get an operand off an identifier node. */
9782 if (TREE_CODE (declarator) == IDENTIFIER_NODE)
9785 tmp = TREE_OPERAND (declarator, 0);
9786 op = IDENTIFIER_OPNAME_P (tmp);
9788 error ("storage class specified for %s `%s'",
9789 op ? "member operator" : "field",
9790 op ? operator_name_string (tmp) : name);
9794 if (decl_context == PARM || decl_context == CATCHPARM)
9795 error ("storage class specified for parameter `%s'", name);
9797 error ("storage class specified for typename");
9799 RIDBIT_RESET (RID_REGISTER, specbits);
9800 RIDBIT_RESET (RID_AUTO, specbits);
9801 RIDBIT_RESET (RID_EXTERN, specbits);
9804 else if (RIDBIT_SETP (RID_EXTERN, specbits) && initialized && !funcdef_flag)
9806 if (toplevel_bindings_p ())
9808 /* It's common practice (and completely valid) to have a const
9809 be initialized and declared extern. */
9810 if (!(type_quals & TYPE_QUAL_CONST))
9811 warning ("`%s' initialized and declared `extern'", name);
9814 error ("`%s' has both `extern' and initializer", name);
9816 else if (RIDBIT_SETP (RID_EXTERN, specbits) && funcdef_flag
9817 && ! toplevel_bindings_p ())
9818 error ("nested function `%s' declared `extern'", name);
9819 else if (toplevel_bindings_p ())
9821 if (RIDBIT_SETP (RID_AUTO, specbits))
9822 error ("top-level declaration of `%s' specifies `auto'", name);
9825 if (nclasses > 0 && friendp)
9826 error ("storage class specifiers invalid in friend function declarations");
9828 /* Now figure out the structure of the declarator proper.
9829 Descend through it, creating more complex types, until we reach
9830 the declared identifier (or NULL_TREE, in an absolute declarator). */
9832 inner_attrs = NULL_TREE;
9835 while (declarator && TREE_CODE (declarator) != IDENTIFIER_NODE
9836 && TREE_CODE (declarator) != TEMPLATE_ID_EXPR)
9838 /* Each level of DECLARATOR is either an ARRAY_REF (for ...[..]),
9839 an INDIRECT_REF (for *...),
9840 a CALL_EXPR (for ...(...)),
9841 an identifier (for the name being declared)
9842 or a null pointer (for the place in an absolute declarator
9843 where the name was omitted).
9844 For the last two cases, we have just exited the loop.
9846 For C++ it could also be
9847 a SCOPE_REF (for class :: ...). In this case, we have converted
9848 sensible names to types, and those are the values we use to
9849 qualify the member name.
9850 an ADDR_EXPR (for &...),
9851 a BIT_NOT_EXPR (for destructors)
9853 At this point, TYPE is the type of elements of an array,
9854 or for a function to return, or for a pointer to point to.
9855 After this sequence of ifs, TYPE is the type of the
9856 array or function or pointer, and DECLARATOR has had its
9857 outermost layer removed. */
9859 if (type == error_mark_node)
9861 if (TREE_CODE (declarator) == SCOPE_REF)
9862 declarator = TREE_OPERAND (declarator, 1);
9864 declarator = TREE_OPERAND (declarator, 0);
9867 if (quals != NULL_TREE
9868 && (declarator == NULL_TREE
9869 || TREE_CODE (declarator) != SCOPE_REF))
9871 if (ctype == NULL_TREE && TREE_CODE (type) == METHOD_TYPE)
9872 ctype = TYPE_METHOD_BASETYPE (type);
9873 if (ctype != NULL_TREE)
9875 tree dummy = build_decl (TYPE_DECL, NULL_TREE, type);
9876 grok_method_quals (ctype, dummy, quals);
9877 type = TREE_TYPE (dummy);
9878 ctype = TREE_TYPE (TREE_VALUE (TYPE_ARG_TYPES (type)));
9883 /* See the comment for the TREE_LIST case, below. */
9886 else if (inner_attrs)
9888 decl_attributes (type, inner_attrs, NULL_TREE);
9889 inner_attrs = NULL_TREE;
9892 switch (TREE_CODE (declarator))
9896 /* We encode a declarator with embedded attributes using
9897 a TREE_LIST. The attributes apply to the declarator
9898 directly inside them, so we have to skip an iteration
9899 before applying them to the type. If the declarator just
9900 inside is the declarator-id, we apply the attrs to the
9902 inner_attrs = TREE_PURPOSE (declarator);
9904 declarator = TREE_VALUE (declarator);
9912 size = TREE_OPERAND (declarator, 1);
9914 /* VC++ spells a zero-sized array with []. */
9915 if (size == NULL_TREE && decl_context == FIELD && ! staticp
9916 && ! RIDBIT_SETP (RID_TYPEDEF, specbits))
9917 size = integer_zero_node;
9919 declarator = TREE_OPERAND (declarator, 0);
9921 type = create_array_type_for_decl (dname, type, size);
9930 tree inner_parms = CALL_DECLARATOR_PARMS (declarator);
9931 tree inner_decl = TREE_OPERAND (declarator, 0);
9933 /* Declaring a function type.
9934 Make sure we have a valid type for the function to return. */
9936 /* We now know that the TYPE_QUALS don't apply to the
9937 decl, but to its return type. */
9938 type_quals = TYPE_UNQUALIFIED;
9940 /* Warn about some types functions can't return. */
9942 if (TREE_CODE (type) == FUNCTION_TYPE)
9944 error ("`%s' declared as function returning a function", name);
9945 type = integer_type_node;
9947 if (TREE_CODE (type) == ARRAY_TYPE)
9949 error ("`%s' declared as function returning an array", name);
9950 type = integer_type_node;
9953 if (inner_decl && TREE_CODE (inner_decl) == SCOPE_REF)
9954 inner_decl = TREE_OPERAND (inner_decl, 1);
9956 if (inner_decl && TREE_CODE (inner_decl) == TEMPLATE_ID_EXPR)
9959 /* Pick up type qualifiers which should be applied to `this'. */
9960 quals = CALL_DECLARATOR_QUALS (declarator);
9962 /* Pick up the exception specifications. */
9963 raises = CALL_DECLARATOR_EXCEPTION_SPEC (declarator);
9965 /* Say it's a definition only for the CALL_EXPR
9966 closest to the identifier. */
9969 && (TREE_CODE (inner_decl) == IDENTIFIER_NODE
9970 || TREE_CODE (inner_decl) == TEMPLATE_ID_EXPR
9971 || TREE_CODE (inner_decl) == BIT_NOT_EXPR);
9973 if (ctype == NULL_TREE
9974 && decl_context == FIELD
9976 && (friendp == 0 || dname == current_class_name))
9977 ctype = current_class_type;
9979 if (ctype && return_type == return_conversion)
9980 TYPE_HAS_CONVERSION (ctype) = 1;
9981 if (ctype && constructor_name (ctype) == dname)
9983 /* We are within a class's scope. If our declarator name
9984 is the same as the class name, and we are defining
9985 a function, then it is a constructor/destructor, and
9986 therefore returns a void type. */
9988 if (flags == DTOR_FLAG)
9990 /* ANSI C++ June 5 1992 WP 12.4.1. A destructor may
9991 not be declared const or volatile. A destructor
9992 may not be static. */
9994 error ("destructor cannot be static member function");
9997 cp_error ("destructors may not be `%s'",
9998 IDENTIFIER_POINTER (TREE_VALUE (quals)));
10001 if (decl_context == FIELD)
10003 if (! member_function_or_else (ctype, current_class_type,
10004 "destructor for alien class `%s' cannot be a member"))
10005 return void_type_node;
10008 else /* It's a constructor. */
10010 if (explicitp == 1)
10012 /* ANSI C++ June 5 1992 WP 12.1.2. A constructor may
10013 not be declared const or volatile. A constructor may
10014 not be virtual. A constructor may not be static. */
10016 error ("constructor cannot be static member function");
10019 pedwarn ("constructors cannot be declared virtual");
10024 cp_error ("constructors may not be `%s'",
10025 IDENTIFIER_POINTER (TREE_VALUE (quals)));
10029 RID_BIT_TYPE tmp_bits;
10030 bcopy ((void*)&specbits, (void*)&tmp_bits, sizeof (RID_BIT_TYPE));
10031 RIDBIT_RESET (RID_INLINE, tmp_bits);
10032 RIDBIT_RESET (RID_STATIC, tmp_bits);
10033 if (RIDBIT_ANY_SET (tmp_bits))
10034 error ("return value type specifier for constructor ignored");
10036 type = build_pointer_type (ctype);
10037 if (decl_context == FIELD)
10039 if (! member_function_or_else (ctype, current_class_type,
10040 "constructor for alien class `%s' cannot be member"))
10041 return void_type_node;
10042 TYPE_HAS_CONSTRUCTOR (ctype) = 1;
10043 if (return_type != return_ctor)
10047 if (decl_context == FIELD)
10053 error ("can't initialize friend function `%s'", name);
10056 /* Cannot be both friend and virtual. */
10057 error ("virtual functions cannot be friends");
10058 RIDBIT_RESET (RID_FRIEND, specbits);
10061 if (decl_context == NORMAL)
10062 error ("friend declaration not in class definition");
10063 if (current_function_decl && funcdef_flag)
10064 cp_error ("can't define friend function `%s' in a local class definition",
10068 /* Construct the function type and go to the next
10069 inner layer of declarator. */
10071 declarator = TREE_OPERAND (declarator, 0);
10073 /* FIXME: This is where default args should be fully
10076 arg_types = grokparms (inner_parms, funcdecl_p ? funcdef_flag : 0);
10078 if (declarator && flags == DTOR_FLAG)
10080 /* A destructor declared in the body of a class will
10081 be represented as a BIT_NOT_EXPR. But, we just
10082 want the underlying IDENTIFIER. */
10083 if (TREE_CODE (declarator) == BIT_NOT_EXPR)
10084 declarator = TREE_OPERAND (declarator, 0);
10086 if (strict_prototype == 0 && arg_types == NULL_TREE)
10087 arg_types = void_list_node;
10088 else if (arg_types == NULL_TREE
10089 || arg_types != void_list_node)
10091 cp_error ("destructors may not have parameters");
10092 arg_types = void_list_node;
10093 last_function_parms = NULL_TREE;
10097 /* ANSI says that `const int foo ();'
10098 does not make the function foo const. */
10099 type = build_function_type (type, arg_types);
10103 for (t = arg_types; t; t = TREE_CHAIN (t))
10104 if (TREE_PURPOSE (t)
10105 && TREE_CODE (TREE_PURPOSE (t)) == DEFAULT_ARG)
10107 add_defarg_fn (type);
10116 /* Filter out pointers-to-references and references-to-references.
10117 We can get these if a TYPE_DECL is used. */
10119 if (TREE_CODE (type) == REFERENCE_TYPE)
10121 error ("cannot declare %s to references",
10122 TREE_CODE (declarator) == ADDR_EXPR
10123 ? "references" : "pointers");
10124 declarator = TREE_OPERAND (declarator, 0);
10128 if (TREE_CODE (type) == OFFSET_TYPE
10129 && (TREE_CODE (TREE_TYPE (type)) == VOID_TYPE
10130 || TREE_CODE (TREE_TYPE (type)) == REFERENCE_TYPE))
10132 cp_error ("cannot declare pointer to `%#T' member",
10134 type = TREE_TYPE (type);
10137 /* Merge any constancy or volatility into the target type
10138 for the pointer. */
10140 /* We now know that the TYPE_QUALS don't apply to the decl,
10141 but to the target of the pointer. */
10142 type_quals = TYPE_UNQUALIFIED;
10144 if (TREE_CODE (declarator) == ADDR_EXPR)
10146 if (TREE_CODE (type) == VOID_TYPE)
10147 error ("invalid type: `void &'");
10149 type = build_reference_type (type);
10151 else if (TREE_CODE (type) == METHOD_TYPE)
10152 type = build_ptrmemfunc_type (build_pointer_type (type));
10154 type = build_pointer_type (type);
10156 /* Process a list of type modifier keywords (such as
10157 const or volatile) that were given inside the `*' or `&'. */
10159 if (TREE_TYPE (declarator))
10161 register tree typemodlist;
10167 for (typemodlist = TREE_TYPE (declarator); typemodlist;
10168 typemodlist = TREE_CHAIN (typemodlist))
10170 tree qualifier = TREE_VALUE (typemodlist);
10172 if (qualifier == ridpointers[(int) RID_CONST])
10174 else if (qualifier == ridpointers[(int) RID_VOLATILE])
10176 else if (qualifier == ridpointers[(int) RID_RESTRICT])
10181 error ("invalid type modifier within pointer declarator");
10185 pedwarn ("duplicate `const'");
10187 pedwarn ("duplicate `volatile'");
10189 pedwarn ("duplicate `restrict'");
10191 type_quals = ((constp ? TYPE_QUAL_CONST : 0)
10192 | (restrictp ? TYPE_QUAL_RESTRICT : 0)
10193 | (volatilep ? TYPE_QUAL_VOLATILE : 0));
10194 if (TREE_CODE (declarator) == ADDR_EXPR
10195 && (constp || volatilep))
10198 pedwarn ("discarding `const' applied to a reference");
10200 pedwarn ("discarding `volatile' applied to a reference");
10201 type_quals &= ~(TYPE_QUAL_CONST | TYPE_QUAL_VOLATILE);
10203 type = cp_build_qualified_type (type, type_quals);
10205 declarator = TREE_OPERAND (declarator, 0);
10211 /* We have converted type names to NULL_TREE if the
10212 name was bogus, or to a _TYPE node, if not.
10214 The variable CTYPE holds the type we will ultimately
10215 resolve to. The code here just needs to build
10216 up appropriate member types. */
10217 tree sname = TREE_OPERAND (declarator, 1);
10220 /* Destructors can have their visibilities changed as well. */
10221 if (TREE_CODE (sname) == BIT_NOT_EXPR)
10222 sname = TREE_OPERAND (sname, 0);
10224 if (TREE_COMPLEXITY (declarator) == 0)
10225 /* This needs to be here, in case we are called
10226 multiple times. */ ;
10227 else if (TREE_COMPLEXITY (declarator) == -1)
10228 /* Namespace member. */
10229 pop_decl_namespace ();
10230 else if (friendp && (TREE_COMPLEXITY (declarator) < 2))
10231 /* Don't fall out into global scope. Hides real bug? --eichin */ ;
10232 else if (! IS_AGGR_TYPE_CODE
10233 (TREE_CODE (TREE_OPERAND (declarator, 0))))
10235 else if (TREE_COMPLEXITY (declarator) == current_class_depth)
10237 /* Resolve any TYPENAME_TYPEs from the decl-specifier-seq
10238 that refer to ctype. They couldn't be resolved earlier
10239 because we hadn't pushed into the class yet.
10240 Example: resolve 'B<T>::type' in
10241 'B<typename B<T>::type> B<T>::f () { }'. */
10242 if (current_template_parms
10243 && uses_template_parms (type)
10244 && uses_template_parms (current_class_type))
10246 tree args = current_template_args ();
10247 type = tsubst (type, args, /*complain=*/1, NULL_TREE);
10250 /* This pop_nested_class corresponds to the
10251 push_nested_class used to push into class scope for
10252 parsing the argument list of a function decl, in
10254 pop_nested_class ();
10255 TREE_COMPLEXITY (declarator) = current_class_depth;
10258 my_friendly_abort (16);
10260 if (TREE_OPERAND (declarator, 0) == NULL_TREE)
10262 /* We had a reference to a global decl, or
10263 perhaps we were given a non-aggregate typedef,
10264 in which case we cleared this out, and should just
10265 keep going as though it wasn't there. */
10266 declarator = sname;
10269 ctype = TREE_OPERAND (declarator, 0);
10272 while (t != NULL_TREE && CLASS_TYPE_P (t))
10274 if (CLASSTYPE_TEMPLATE_INFO (t) &&
10275 !CLASSTYPE_TEMPLATE_SPECIALIZATION (t))
10276 template_count += 1;
10277 t = TYPE_MAIN_DECL (t);
10278 if (DECL_LANG_SPECIFIC (t))
10279 t = DECL_CLASS_CONTEXT (t);
10284 if (sname == NULL_TREE)
10287 if (TREE_CODE (sname) == IDENTIFIER_NODE)
10289 /* This is the `standard' use of the scoping operator:
10290 basetype :: member . */
10292 if (ctype == current_class_type)
10298 Is this ill-formed? */
10301 cp_pedwarn ("extra qualification `%T::' on member `%s' ignored",
10304 else if (TREE_CODE (type) == FUNCTION_TYPE)
10306 if (current_class_type == NULL_TREE
10308 type = build_cplus_method_type (ctype, TREE_TYPE (type),
10309 TYPE_ARG_TYPES (type));
10312 cp_error ("cannot declare member function `%T::%s' within `%T'",
10313 ctype, name, current_class_type);
10314 return void_type_node;
10317 else if (RIDBIT_SETP (RID_TYPEDEF, specbits)
10318 || TYPE_SIZE (complete_type (ctype)) != NULL_TREE)
10320 /* Have to move this code elsewhere in this function.
10321 this code is used for i.e., typedef int A::M; M *pm;
10323 It is? How? jason 10/2/94 */
10325 if (current_class_type)
10327 cp_error ("cannot declare member `%T::%s' within `%T'",
10328 ctype, name, current_class_type);
10329 return void_type_node;
10331 type = build_offset_type (ctype, type);
10333 else if (uses_template_parms (ctype))
10335 if (TREE_CODE (type) == FUNCTION_TYPE)
10337 = build_cplus_method_type (ctype, TREE_TYPE (type),
10338 TYPE_ARG_TYPES (type));
10342 cp_error ("structure `%T' not yet defined", ctype);
10343 return error_mark_node;
10346 declarator = sname;
10348 else if (TREE_CODE (sname) == SCOPE_REF)
10349 my_friendly_abort (17);
10353 declarator = TREE_OPERAND (declarator, 1);
10354 if (declarator && TREE_CODE (declarator) == CALL_EXPR)
10355 /* In this case, we will deal with it later. */
10359 if (TREE_CODE (type) == FUNCTION_TYPE)
10360 type = build_cplus_method_type (ctype, TREE_TYPE (type),
10361 TYPE_ARG_TYPES (type));
10363 type = build_offset_type (ctype, type);
10370 declarator = TREE_OPERAND (declarator, 0);
10375 case ENUMERAL_TYPE:
10376 declarator = NULL_TREE;
10380 declarator = NULL_TREE;
10384 my_friendly_abort (158);
10388 /* See the comment for the TREE_LIST case, above. */
10391 if (! ignore_attrs)
10392 decl_attributes (type, inner_attrs, NULL_TREE);
10394 TREE_VALUE (attrlist) = chainon (inner_attrs, TREE_VALUE (attrlist));
10396 attrlist = build_decl_list (NULL_TREE, inner_attrs);
10399 /* Now TYPE has the actual type. */
10401 if (explicitp == 1 || (explicitp && friendp))
10403 /* [dcl.fct.spec] The explicit specifier shall only be used in
10404 declarations of constructors within a class definition. */
10405 error ("only declarations of constructors can be `explicit'");
10409 if (RIDBIT_SETP (RID_MUTABLE, specbits))
10411 if (current_class_name == NULL_TREE || decl_context == PARM || friendp)
10413 error ("non-member `%s' cannot be declared `mutable'", name);
10414 RIDBIT_RESET (RID_MUTABLE, specbits);
10416 else if (decl_context == TYPENAME || RIDBIT_SETP (RID_TYPEDEF, specbits))
10418 error ("non-object member `%s' cannot be declared `mutable'", name);
10419 RIDBIT_RESET (RID_MUTABLE, specbits);
10421 else if (TREE_CODE (type) == FUNCTION_TYPE
10422 || TREE_CODE (type) == METHOD_TYPE)
10424 error ("function `%s' cannot be declared `mutable'", name);
10425 RIDBIT_RESET (RID_MUTABLE, specbits);
10429 error ("static `%s' cannot be declared `mutable'", name);
10430 RIDBIT_RESET (RID_MUTABLE, specbits);
10432 else if (type_quals & TYPE_QUAL_CONST)
10434 error ("const `%s' cannot be declared `mutable'", name);
10435 RIDBIT_RESET (RID_MUTABLE, specbits);
10439 if (declarator == NULL_TREE
10440 || TREE_CODE (declarator) == IDENTIFIER_NODE
10441 || (TREE_CODE (declarator) == TEMPLATE_ID_EXPR
10442 && (TREE_CODE (type) == FUNCTION_TYPE
10443 || TREE_CODE (type) == METHOD_TYPE)))
10445 else if (TREE_CODE (declarator) == TEMPLATE_ID_EXPR)
10447 cp_error ("template-id `%D' used as a declarator", declarator);
10448 declarator = dname;
10451 /* Unexpected declarator format. */
10452 my_friendly_abort (990210);
10454 /* If this is declaring a typedef name, return a TYPE_DECL. */
10456 if (RIDBIT_SETP (RID_TYPEDEF, specbits) && decl_context != TYPENAME)
10460 /* Note that the grammar rejects storage classes
10461 in typenames, fields or parameters. */
10462 if (current_lang_name == lang_name_java)
10463 TYPE_FOR_JAVA (type) = 1;
10465 if (decl_context == FIELD)
10467 if (declarator == constructor_name (current_class_type))
10468 cp_pedwarn ("ANSI C++ forbids nested type `%D' with same name as enclosing class",
10470 decl = build_lang_decl (TYPE_DECL, declarator, type);
10474 /* Make sure this typedef lives as long as its type,
10475 since it might be used as a template parameter. */
10476 if (processing_template_decl)
10477 decl = build_lang_decl (TYPE_DECL, declarator, type);
10479 decl = build_decl (TYPE_DECL, declarator, type);
10482 /* If the user declares "typedef struct {...} foo" then the
10483 struct will have an anonymous name. Fill that name in now.
10484 Nothing can refer to it, so nothing needs know about the name
10486 if (type != error_mark_node
10487 && TYPE_NAME (type)
10488 && TREE_CODE (TYPE_NAME (type)) == TYPE_DECL
10489 && ANON_AGGRNAME_P (TYPE_IDENTIFIER (type))
10490 && CP_TYPE_QUALS (type) == TYPE_UNQUALIFIED)
10492 tree oldname = TYPE_NAME (type);
10495 /* Replace the anonymous name with the real name everywhere. */
10496 lookup_tag_reverse (type, declarator);
10497 for (t = TYPE_MAIN_VARIANT (type); t; t = TYPE_NEXT_VARIANT (t))
10498 if (TYPE_NAME (t) == oldname)
10499 TYPE_NAME (t) = decl;
10501 if (TYPE_LANG_SPECIFIC (type))
10502 TYPE_WAS_ANONYMOUS (type) = 1;
10504 /* If this is a typedef within a template class, the nested
10505 type is a (non-primary) template. The name for the
10506 template needs updating as well. */
10507 if (TYPE_LANG_SPECIFIC (type) && CLASSTYPE_TEMPLATE_INFO (type))
10508 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type))
10509 = TYPE_IDENTIFIER (type);
10511 /* XXX Temporarily set the scope.
10512 When returning, start_decl expects it as NULL_TREE,
10513 and will then then set it using pushdecl. */
10514 my_friendly_assert (DECL_CONTEXT (decl) == NULL_TREE, 980404);
10515 if (current_class_type)
10516 DECL_CONTEXT (decl) = current_class_type;
10518 DECL_CONTEXT (decl) = FROB_CONTEXT (current_namespace);
10520 DECL_ASSEMBLER_NAME (decl) = DECL_NAME (decl);
10521 DECL_ASSEMBLER_NAME (decl)
10522 = get_identifier (build_overload_name (type, 1, 1));
10523 DECL_CONTEXT (decl) = NULL_TREE;
10525 /* FIXME remangle member functions; member functions of a
10526 type with external linkage have external linkage. */
10529 if (TREE_CODE (type) == OFFSET_TYPE || TREE_CODE (type) == METHOD_TYPE)
10531 cp_error_at ("typedef name may not be class-qualified", decl);
10536 if (ctype == NULL_TREE)
10538 if (TREE_CODE (type) != METHOD_TYPE)
10539 cp_error_at ("invalid type qualifier for non-method type", decl);
10541 ctype = TYPE_METHOD_BASETYPE (type);
10543 if (ctype != NULL_TREE)
10544 grok_method_quals (ctype, decl, quals);
10547 if (RIDBIT_SETP (RID_SIGNED, specbits)
10548 || (typedef_decl && C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl)))
10549 C_TYPEDEF_EXPLICITLY_SIGNED (decl) = 1;
10551 bad_specifiers (decl, "type", virtualp, quals != NULL_TREE,
10552 inlinep, friendp, raises != NULL_TREE);
10555 error ("typedef declaration includes an initializer");
10560 /* Detect the case of an array type of unspecified size
10561 which came, as such, direct from a typedef name.
10562 We must copy the type, so that each identifier gets
10563 a distinct type, so that each identifier's size can be
10564 controlled separately by its own initializer. */
10566 if (type == typedef_type && TREE_CODE (type) == ARRAY_TYPE
10567 && TYPE_DOMAIN (type) == NULL_TREE)
10569 type = build_cplus_array_type (TREE_TYPE (type), TYPE_DOMAIN (type));
10572 /* If this is a type name (such as, in a cast or sizeof),
10573 compute the type and return it now. */
10575 if (decl_context == TYPENAME)
10577 /* Note that the grammar rejects storage classes
10578 in typenames, fields or parameters. */
10579 if (type_quals != TYPE_UNQUALIFIED)
10580 type_quals = TYPE_UNQUALIFIED;
10582 /* Special case: "friend class foo" looks like a TYPENAME context. */
10585 if (type_quals != TYPE_UNQUALIFIED)
10587 cp_error ("type qualifiers specified for friend class declaration");
10588 type_quals = TYPE_UNQUALIFIED;
10592 cp_error ("`inline' specified for friend class declaration");
10596 /* Only try to do this stuff if we didn't already give up. */
10597 if (type != integer_type_node)
10599 /* A friendly class? */
10600 if (current_class_type)
10601 make_friend_class (current_class_type, TYPE_MAIN_VARIANT (type));
10603 error ("trying to make class `%s' a friend of global scope",
10604 TYPE_NAME_STRING (type));
10605 type = void_type_node;
10610 tree dummy = build_decl (TYPE_DECL, declarator, type);
10611 if (ctype == NULL_TREE)
10613 my_friendly_assert (TREE_CODE (type) == METHOD_TYPE, 159);
10614 ctype = TYPE_METHOD_BASETYPE (type);
10616 grok_method_quals (ctype, dummy, quals);
10617 type = TREE_TYPE (dummy);
10622 else if (declarator == NULL_TREE && decl_context != PARM
10623 && decl_context != CATCHPARM
10624 && TREE_CODE (type) != UNION_TYPE
10627 cp_error ("abstract declarator `%T' used as declaration", type);
10628 declarator = make_anon_name ();
10631 /* `void' at top level (not within pointer)
10632 is allowed only in typedefs or type names.
10633 We don't complain about parms either, but that is because
10634 a better error message can be made later. */
10636 if (TREE_CODE (type) == VOID_TYPE && decl_context != PARM)
10639 error ("unnamed variable or field declared void");
10640 else if (TREE_CODE (declarator) == IDENTIFIER_NODE)
10642 if (IDENTIFIER_OPNAME_P (declarator))
10643 my_friendly_abort (356);
10645 error ("variable or field `%s' declared void", name);
10648 error ("variable or field declared void");
10649 type = integer_type_node;
10652 /* Now create the decl, which may be a VAR_DECL, a PARM_DECL
10653 or a FUNCTION_DECL, depending on DECL_CONTEXT and TYPE. */
10655 if (decl_context == PARM || decl_context == CATCHPARM)
10657 if (ctype || in_namespace)
10658 error ("cannot use `::' in parameter declaration");
10660 /* A parameter declared as an array of T is really a pointer to T.
10661 One declared as a function is really a pointer to a function.
10662 One declared as a member is really a pointer to member. */
10664 if (TREE_CODE (type) == ARRAY_TYPE)
10666 /* Transfer const-ness of array into that of type pointed to. */
10667 type = build_pointer_type (TREE_TYPE (type));
10668 type_quals = TYPE_UNQUALIFIED;
10670 else if (TREE_CODE (type) == FUNCTION_TYPE)
10671 type = build_pointer_type (type);
10672 else if (TREE_CODE (type) == OFFSET_TYPE)
10673 type = build_pointer_type (type);
10674 else if (TREE_CODE (type) == VOID_TYPE && declarator)
10676 error ("declaration of `%s' as void", name);
10682 register tree decl;
10684 if (decl_context == PARM)
10686 decl = build_decl (PARM_DECL, declarator, type);
10688 bad_specifiers (decl, "parameter", virtualp, quals != NULL_TREE,
10689 inlinep, friendp, raises != NULL_TREE);
10691 /* Compute the type actually passed in the parmlist,
10692 for the case where there is no prototype.
10693 (For example, shorts and chars are passed as ints.)
10694 When there is a prototype, this is overridden later. */
10696 DECL_ARG_TYPE (decl) = type_promotes_to (type);
10698 else if (decl_context == FIELD)
10700 if (type == error_mark_node)
10702 /* Happens when declaring arrays of sizes which
10703 are error_mark_node, for example. */
10706 else if (in_namespace && !friendp)
10708 /* Something like struct S { int N::j; }; */
10709 cp_error ("invalid use of `::'");
10712 else if (TREE_CODE (type) == FUNCTION_TYPE)
10715 tree function_context;
10717 /* We catch the others as conflicts with the builtin
10719 if (friendp && declarator == ridpointers[(int) RID_SIGNED])
10721 cp_error ("function `%D' cannot be declared friend",
10728 if (ctype == NULL_TREE)
10729 ctype = current_class_type;
10731 if (ctype == NULL_TREE)
10733 cp_error ("can't make `%D' into a method -- not in a class",
10735 return void_type_node;
10738 /* ``A union may [ ... ] not [ have ] virtual functions.''
10740 if (virtualp && TREE_CODE (ctype) == UNION_TYPE)
10742 cp_error ("function `%D' declared virtual inside a union",
10744 return void_type_node;
10747 if (declarator == ansi_opname[(int) NEW_EXPR]
10748 || declarator == ansi_opname[(int) VEC_NEW_EXPR]
10749 || declarator == ansi_opname[(int) DELETE_EXPR]
10750 || declarator == ansi_opname[(int) VEC_DELETE_EXPR])
10754 cp_error ("`%D' cannot be declared virtual, since it is always static",
10759 else if (staticp < 2)
10760 type = build_cplus_method_type (ctype, TREE_TYPE (type),
10761 TYPE_ARG_TYPES (type));
10764 /* Tell grokfndecl if it needs to set TREE_PUBLIC on the node. */
10765 function_context = (ctype != NULL_TREE) ?
10766 hack_decl_function_context (TYPE_MAIN_DECL (ctype)) : NULL_TREE;
10767 publicp = (! friendp || ! staticp)
10768 && function_context == NULL_TREE;
10769 decl = grokfndecl (ctype, type,
10770 TREE_CODE (declarator) != TEMPLATE_ID_EXPR
10771 ? declarator : dname,
10773 virtualp, flags, quals, raises,
10774 friendp ? -1 : 0, friendp, publicp, inlinep,
10775 funcdef_flag, template_count, in_namespace);
10776 if (decl == NULL_TREE)
10779 /* This clobbers the attrs stored in `decl' from `attrlist'. */
10780 /* The decl and setting of decl_machine_attr is also turned off. */
10781 decl = build_decl_attribute_variant (decl, decl_machine_attr);
10784 /* [class.conv.ctor]
10786 A constructor declared without the function-specifier
10787 explicit that can be called with a single parameter
10788 specifies a conversion from the type of its first
10789 parameter to the type of its class. Such a constructor
10790 is called a converting constructor. */
10791 if (explicitp == 2)
10792 DECL_NONCONVERTING_P (decl) = 1;
10793 else if (DECL_CONSTRUCTOR_P (decl))
10795 /* The constructor can be called with exactly one
10796 parameter if there is at least one parameter, and
10797 any subsequent parameters have default arguments.
10798 We don't look at the first parameter, which is
10799 really just the `this' parameter for the new
10802 TREE_CHAIN (TYPE_ARG_TYPES (TREE_TYPE (decl)));
10804 /* Skip the `in_chrg' argument too, if present. */
10805 if (TYPE_USES_VIRTUAL_BASECLASSES (DECL_CONTEXT (decl)))
10806 arg_types = TREE_CHAIN (arg_types);
10808 if (arg_types == void_list_node
10810 && TREE_CHAIN (arg_types)
10811 && TREE_CHAIN (arg_types) != void_list_node
10812 && !TREE_PURPOSE (TREE_CHAIN (arg_types))))
10813 DECL_NONCONVERTING_P (decl) = 1;
10816 else if (TREE_CODE (type) == METHOD_TYPE)
10818 /* We only get here for friend declarations of
10819 members of other classes. */
10820 /* All method decls are public, so tell grokfndecl to set
10821 TREE_PUBLIC, also. */
10822 decl = grokfndecl (ctype, type, declarator, declarator,
10823 virtualp, flags, quals, raises,
10824 friendp ? -1 : 0, friendp, 1, 0, funcdef_flag,
10825 template_count, in_namespace);
10826 if (decl == NULL_TREE)
10829 else if (!staticp && ! processing_template_decl
10830 && TYPE_SIZE (complete_type (type)) == NULL_TREE
10831 && (TREE_CODE (type) != ARRAY_TYPE || initialized == 0))
10834 cp_error ("field `%D' has incomplete type", declarator);
10836 cp_error ("name `%T' has incomplete type", type);
10838 /* If we're instantiating a template, tell them which
10839 instantiation made the field's type be incomplete. */
10840 if (current_class_type
10841 && TYPE_NAME (current_class_type)
10842 && IDENTIFIER_TEMPLATE (TYPE_IDENTIFIER (current_class_type))
10843 && declspecs && TREE_VALUE (declspecs)
10844 && TREE_TYPE (TREE_VALUE (declspecs)) == type)
10845 cp_error (" in instantiation of template `%T'",
10846 current_class_type);
10848 type = error_mark_node;
10855 error ("`%s' is neither function nor method; cannot be declared friend",
10856 IDENTIFIER_POINTER (declarator));
10864 /* Friends are treated specially. */
10865 if (ctype == current_class_type)
10866 warning ("member functions are implicitly friends of their class");
10869 tree t = NULL_TREE;
10870 if (decl && DECL_NAME (decl))
10872 if (template_class_depth (current_class_type) == 0)
10875 = check_explicit_specialization
10877 template_count, 2 * (funcdef_flag != 0) + 4);
10878 if (decl == error_mark_node)
10879 return error_mark_node;
10882 t = do_friend (ctype, declarator, decl,
10883 last_function_parms, attrlist, flags, quals,
10886 if (t && funcdef_flag)
10889 return void_type_node;
10893 /* Structure field. It may not be a function, except for C++ */
10895 if (decl == NULL_TREE)
10901 /* An attempt is being made to initialize a non-static
10902 member. But, from [class.mem]:
10904 4 A member-declarator can contain a
10905 constant-initializer only if it declares a static
10906 member (_class.static_) of integral or enumeration
10907 type, see _class.static.data_.
10909 This used to be relatively common practice, but
10910 the rest of the compiler does not correctly
10911 handle the initialization unless the member is
10912 static so we make it static below. */
10913 cp_pedwarn ("ANSI C++ forbids initialization of member `%D'",
10915 cp_pedwarn ("making `%D' static", declarator);
10919 if (uses_template_parms (type))
10920 /* We'll check at instantiation time. */
10922 else if (check_static_variable_definition (declarator,
10924 /* If we just return the declaration, crashes
10925 will sometimes occur. We therefore return
10926 void_type_node, as if this was a friend
10927 declaration, to cause callers to completely
10928 ignore this declaration. */
10929 return void_type_node;
10932 /* 9.2p13 [class.mem] */
10933 if (declarator == constructor_name (current_class_type)
10934 /* Divergence from the standard: In extern "C", we
10935 allow non-static data members here, because C does
10936 and /usr/include/netinet/in.h uses that. */
10937 && (staticp || ! in_system_header))
10938 cp_pedwarn ("ANSI C++ forbids data member `%D' with same name as enclosing class",
10943 /* C++ allows static class members. All other work
10944 for this is done by grokfield. */
10945 decl = build_lang_decl (VAR_DECL, declarator, type);
10946 TREE_STATIC (decl) = 1;
10947 /* In class context, 'static' means public access. */
10948 TREE_PUBLIC (decl) = DECL_EXTERNAL (decl) = 1;
10952 decl = build_lang_decl (FIELD_DECL, declarator, type);
10953 if (RIDBIT_SETP (RID_MUTABLE, specbits))
10955 DECL_MUTABLE_P (decl) = 1;
10956 RIDBIT_RESET (RID_MUTABLE, specbits);
10960 bad_specifiers (decl, "field", virtualp, quals != NULL_TREE,
10961 inlinep, friendp, raises != NULL_TREE);
10964 else if (TREE_CODE (type) == FUNCTION_TYPE || TREE_CODE (type) == METHOD_TYPE)
10966 tree original_name;
10972 if (TREE_CODE (declarator) == TEMPLATE_ID_EXPR)
10973 original_name = dname;
10975 original_name = declarator;
10977 if (RIDBIT_SETP (RID_AUTO, specbits))
10978 error ("storage class `auto' invalid for function `%s'", name);
10979 else if (RIDBIT_SETP (RID_REGISTER, specbits))
10980 error ("storage class `register' invalid for function `%s'", name);
10982 /* Function declaration not at top level.
10983 Storage classes other than `extern' are not allowed
10984 and `extern' makes no difference. */
10985 if (! toplevel_bindings_p ()
10986 && (RIDBIT_SETP (RID_STATIC, specbits)
10987 || RIDBIT_SETP (RID_INLINE, specbits))
10990 if (RIDBIT_SETP (RID_STATIC, specbits))
10991 pedwarn ("storage class `static' invalid for function `%s' declared out of global scope", name);
10993 pedwarn ("storage class `inline' invalid for function `%s' declared out of global scope", name);
10996 if (ctype == NULL_TREE)
11000 error ("virtual non-class function `%s'", name);
11004 else if (TREE_CODE (type) == FUNCTION_TYPE && staticp < 2)
11005 type = build_cplus_method_type (ctype, TREE_TYPE (type),
11006 TYPE_ARG_TYPES (type));
11008 /* Record presence of `static'. */
11009 publicp = (ctype != NULL_TREE
11010 || RIDBIT_SETP (RID_EXTERN, specbits)
11011 || !RIDBIT_SETP (RID_STATIC, specbits));
11013 decl = grokfndecl (ctype, type, original_name, declarator,
11014 virtualp, flags, quals, raises,
11016 publicp, inlinep, funcdef_flag,
11017 template_count, in_namespace);
11018 if (decl == NULL_TREE)
11023 int illegal_static = 0;
11025 /* Don't allow a static member function in a class, and forbid
11026 declaring main to be static. */
11027 if (TREE_CODE (type) == METHOD_TYPE)
11029 cp_pedwarn ("cannot declare member function `%D' to have static linkage", decl);
11030 illegal_static = 1;
11032 else if (current_function_decl)
11034 /* FIXME need arm citation */
11035 error ("cannot declare static function inside another function");
11036 illegal_static = 1;
11039 if (illegal_static)
11042 RIDBIT_RESET (RID_STATIC, specbits);
11048 /* It's a variable. */
11050 /* An uninitialized decl with `extern' is a reference. */
11051 decl = grokvardecl (type, declarator, &specbits,
11053 (type_quals & TYPE_QUAL_CONST) != 0,
11055 bad_specifiers (decl, "variable", virtualp, quals != NULL_TREE,
11056 inlinep, friendp, raises != NULL_TREE);
11060 DECL_CONTEXT (decl) = ctype;
11063 cp_pedwarn ("static member `%D' re-declared as static", decl);
11065 RIDBIT_RESET (RID_STATIC, specbits);
11067 if (RIDBIT_SETP (RID_REGISTER, specbits) && TREE_STATIC (decl))
11069 cp_error ("static member `%D' declared `register'", decl);
11070 RIDBIT_RESET (RID_REGISTER, specbits);
11072 if (RIDBIT_SETP (RID_EXTERN, specbits) && pedantic)
11074 cp_pedwarn ("cannot explicitly declare member `%#D' to have extern linkage",
11076 RIDBIT_RESET (RID_EXTERN, specbits);
11081 my_friendly_assert (!RIDBIT_SETP (RID_MUTABLE, specbits), 19990927);
11083 /* Record `register' declaration for warnings on &
11084 and in case doing stupid register allocation. */
11086 if (RIDBIT_SETP (RID_REGISTER, specbits))
11087 DECL_REGISTER (decl) = 1;
11089 if (RIDBIT_SETP (RID_EXTERN, specbits))
11090 DECL_THIS_EXTERN (decl) = 1;
11092 if (RIDBIT_SETP (RID_STATIC, specbits))
11093 DECL_THIS_STATIC (decl) = 1;
11095 /* Record constancy and volatility. There's no need to do this
11096 when processing a template; we'll do this for the instantiated
11097 declaration based on the type of DECL. */
11098 if (!processing_template_decl)
11099 c_apply_type_quals_to_decl (type_quals, decl);
11105 /* Tell if a parmlist/exprlist looks like an exprlist or a parmlist.
11106 An empty exprlist is a parmlist. An exprlist which
11107 contains only identifiers at the global level
11108 is a parmlist. Otherwise, it is an exprlist. */
11111 parmlist_is_exprlist (exprs)
11114 if (exprs == NULL_TREE || TREE_PARMLIST (exprs))
11117 if (toplevel_bindings_p ())
11119 /* At the global level, if these are all identifiers,
11120 then it is a parmlist. */
11123 if (TREE_CODE (TREE_VALUE (exprs)) != IDENTIFIER_NODE)
11125 exprs = TREE_CHAIN (exprs);
11132 /* Subroutine of start_function. Ensure that each of the parameter
11133 types (as listed in PARMS) is complete, as is required for a
11134 function definition. */
11137 require_complete_types_for_parms (parms)
11142 tree type = TREE_TYPE (parms);
11143 if (TYPE_SIZE (complete_type (type)) == NULL_TREE)
11145 if (DECL_NAME (parms))
11146 error ("parameter `%s' has incomplete type",
11147 IDENTIFIER_POINTER (DECL_NAME (parms)));
11149 error ("parameter has incomplete type");
11150 TREE_TYPE (parms) = error_mark_node;
11153 layout_decl (parms, 0);
11155 parms = TREE_CHAIN (parms);
11159 /* Returns non-zero if T is a local variable. */
11162 local_variable_p (t)
11165 if ((TREE_CODE (t) == VAR_DECL
11166 /* A VAR_DECL with a context that is a _TYPE is a static data
11168 && !TYPE_P (CP_DECL_CONTEXT (t))
11169 /* Any other non-local variable must be at namespace scope. */
11170 && !DECL_NAMESPACE_SCOPE_P (t))
11171 || (TREE_CODE (t) == PARM_DECL))
11177 /* Returns non-zero if T is an automatic local variable or a label.
11178 (These are the declarations that need to be remapped when the code
11179 containing them is duplicated.) */
11182 nonstatic_local_decl_p (t)
11185 return ((local_variable_p (t) && !TREE_STATIC (t))
11186 || TREE_CODE (t) == LABEL_DECL
11187 || TREE_CODE (t) == RESULT_DECL);
11190 /* Like local_variable_p, but suitable for use as a tree-walking
11194 local_variable_p_walkfn (tp, walk_subtrees, data)
11196 int *walk_subtrees ATTRIBUTE_UNUSED;
11197 void *data ATTRIBUTE_UNUSED;
11199 return ((local_variable_p (*tp) && !DECL_ARTIFICIAL (*tp))
11200 ? *tp : NULL_TREE);
11203 /* Check that ARG, which is a default-argument expression for a
11204 parameter DECL, is legal. Returns ARG, or ERROR_MARK_NODE, if
11205 something goes wrong. DECL may also be a _TYPE node, rather than a
11206 DECL, if there is no DECL available. */
11209 check_default_argument (decl, arg)
11216 if (TREE_CODE (arg) == DEFAULT_ARG)
11217 /* We get a DEFAULT_ARG when looking at an in-class declaration
11218 with a default argument. Ignore the argument for now; we'll
11219 deal with it after the class is complete. */
11222 if (processing_template_decl || uses_template_parms (arg))
11223 /* We don't do anything checking until instantiation-time. Note
11224 that there may be uninstantiated arguments even for an
11225 instantiated function, since default arguments are not
11226 instantiated until they are needed. */
11235 decl_type = TREE_TYPE (decl);
11237 if (arg == error_mark_node
11238 || decl == error_mark_node
11239 || TREE_TYPE (arg) == error_mark_node
11240 || decl_type == error_mark_node)
11241 /* Something already went wrong. There's no need to check
11243 return error_mark_node;
11245 /* [dcl.fct.default]
11247 A default argument expression is implicitly converted to the
11249 if (!TREE_TYPE (arg)
11250 || !can_convert_arg (decl_type, TREE_TYPE (arg), arg))
11253 cp_error ("default argument for `%#D' has type `%T'",
11254 decl, TREE_TYPE (arg));
11256 cp_error ("default argument for parameter of type `%T' has type `%T'",
11257 decl_type, TREE_TYPE (arg));
11259 return error_mark_node;
11262 /* [dcl.fct.default]
11264 Local variables shall not be used in default argument
11267 The keyword `this' shall not be used in a default argument of a
11268 member function. */
11269 var = walk_tree (&arg, local_variable_p_walkfn, NULL);
11272 cp_error ("default argument `%E' uses local variable `%D'",
11274 return error_mark_node;
11281 /* Decode the list of parameter types for a function type.
11282 Given the list of things declared inside the parens,
11283 return a list of types.
11285 The list we receive can have three kinds of elements:
11286 an IDENTIFIER_NODE for names given without types,
11287 a TREE_LIST node for arguments given as typespecs or names with typespecs,
11288 or void_type_node, to mark the end of an argument list
11289 when additional arguments are not permitted (... was not used).
11291 FUNCDEF_FLAG is nonzero for a function definition, 0 for
11292 a mere declaration. A nonempty identifier-list gets an error message
11293 when FUNCDEF_FLAG is zero.
11294 If FUNCDEF_FLAG is 1, then parameter types must be complete.
11295 If FUNCDEF_FLAG is -1, then parameter types may be incomplete.
11297 If all elements of the input list contain types,
11298 we return a list of the types.
11299 If all elements contain no type (except perhaps a void_type_node
11300 at the end), we return a null list.
11301 If some have types and some do not, it is an error, and we
11302 return a null list.
11304 Also set last_function_parms to either
11305 a list of names (IDENTIFIER_NODEs) or a chain of PARM_DECLs.
11306 A list of names is converted to a chain of PARM_DECLs
11307 by store_parm_decls so that ultimately it is always a chain of decls.
11309 Note that in C++, parameters can take default values. These default
11310 values are in the TREE_PURPOSE field of the TREE_LIST. It is
11311 an error to specify default values which are followed by parameters
11312 that have no default values, or an ELLIPSES. For simplicities sake,
11313 only parameters which are specified with their types can take on
11317 grokparms (first_parm, funcdef_flag)
11321 tree result = NULL_TREE;
11322 tree decls = NULL_TREE;
11324 if (first_parm != NULL_TREE
11325 && TREE_CODE (TREE_VALUE (first_parm)) == IDENTIFIER_NODE)
11327 if (! funcdef_flag)
11328 pedwarn ("parameter names (without types) in function declaration");
11329 last_function_parms = first_parm;
11332 else if (first_parm != NULL_TREE
11333 && TREE_CODE (TREE_VALUE (first_parm)) != TREE_LIST
11334 && TREE_CODE (TREE_VALUE (first_parm)) != VOID_TYPE)
11335 my_friendly_abort (145);
11338 /* Types were specified. This is a list of declarators
11339 each represented as a TREE_LIST node. */
11340 register tree parm, chain;
11341 int any_init = 0, any_error = 0;
11343 if (first_parm != NULL_TREE)
11345 tree last_result = NULL_TREE;
11346 tree last_decl = NULL_TREE;
11348 for (parm = first_parm; parm != NULL_TREE; parm = chain)
11350 tree type = NULL_TREE, list_node = parm;
11351 register tree decl = TREE_VALUE (parm);
11352 tree init = TREE_PURPOSE (parm);
11354 chain = TREE_CHAIN (parm);
11355 /* @@ weak defense against parse errors. */
11356 if (TREE_CODE (decl) != VOID_TYPE
11357 && TREE_CODE (decl) != TREE_LIST)
11359 /* Give various messages as the need arises. */
11360 if (TREE_CODE (decl) == STRING_CST)
11361 cp_error ("invalid string constant `%E'", decl);
11362 else if (TREE_CODE (decl) == INTEGER_CST)
11363 error ("invalid integer constant in parameter list, did you forget to give parameter name?");
11367 if (TREE_CODE (decl) != VOID_TYPE)
11369 decl = grokdeclarator (TREE_VALUE (decl),
11370 TREE_PURPOSE (decl),
11371 PARM, init != NULL_TREE,
11373 if (! decl || TREE_TYPE (decl) == error_mark_node)
11376 /* Top-level qualifiers on the parameters are
11377 ignored for function types. */
11378 type = TYPE_MAIN_VARIANT (TREE_TYPE (decl));
11380 if (TREE_CODE (type) == VOID_TYPE)
11381 decl = void_type_node;
11382 else if (TREE_CODE (type) == METHOD_TYPE)
11384 if (DECL_NAME (decl))
11385 /* Cannot use the decl here because
11386 we don't have DECL_CONTEXT set up yet. */
11387 cp_error ("parameter `%D' invalidly declared method type",
11390 error ("parameter invalidly declared method type");
11391 type = build_pointer_type (type);
11392 TREE_TYPE (decl) = type;
11394 else if (TREE_CODE (type) == OFFSET_TYPE)
11396 if (DECL_NAME (decl))
11397 cp_error ("parameter `%D' invalidly declared offset type",
11400 error ("parameter invalidly declared offset type");
11401 type = build_pointer_type (type);
11402 TREE_TYPE (decl) = type;
11404 else if (abstract_virtuals_error (decl, type))
11405 any_error = 1; /* Seems like a good idea. */
11406 else if (POINTER_TYPE_P (type))
11409 while (POINTER_TYPE_P (t)
11410 || (TREE_CODE (t) == ARRAY_TYPE
11411 && TYPE_DOMAIN (t) != NULL_TREE))
11413 if (TREE_CODE (t) == ARRAY_TYPE)
11414 cp_error ("parameter type `%T' includes %s to array of unknown bound",
11416 TYPE_PTR_P (type) ? "pointer" : "reference");
11420 if (TREE_CODE (decl) == VOID_TYPE)
11422 if (result == NULL_TREE)
11424 result = void_list_node;
11425 last_result = result;
11429 TREE_CHAIN (last_result) = void_list_node;
11430 last_result = void_list_node;
11433 && (chain != void_list_node || TREE_CHAIN (chain)))
11434 error ("`void' in parameter list must be entire list");
11438 /* Since there is a prototype, args are passed in their own types. */
11439 DECL_ARG_TYPE (decl) = TREE_TYPE (decl);
11440 if (PROMOTE_PROTOTYPES
11441 && (TREE_CODE (type) == INTEGER_TYPE
11442 || TREE_CODE (type) == ENUMERAL_TYPE)
11443 && TYPE_PRECISION (type) < TYPE_PRECISION (integer_type_node))
11444 DECL_ARG_TYPE (decl) = integer_type_node;
11445 if (!any_error && init)
11448 init = check_default_argument (decl, init);
11453 if (decls == NULL_TREE)
11460 TREE_CHAIN (last_decl) = decl;
11463 list_node = tree_cons (init, type, NULL_TREE);
11464 if (result == NULL_TREE)
11466 result = list_node;
11467 last_result = result;
11471 TREE_CHAIN (last_result) = list_node;
11472 last_result = list_node;
11476 TREE_CHAIN (last_result) = NULL_TREE;
11477 /* If there are no parameters, and the function does not end
11478 with `...', then last_decl will be NULL_TREE. */
11479 if (last_decl != NULL_TREE)
11480 TREE_CHAIN (last_decl) = NULL_TREE;
11484 last_function_parms = decls;
11489 /* Called from the parser to update an element of TYPE_ARG_TYPES for some
11490 FUNCTION_TYPE with the newly parsed version of its default argument, which
11491 was previously digested as text. See snarf_defarg et al in lex.c. */
11494 replace_defarg (arg, init)
11497 if (! processing_template_decl
11498 && ! can_convert_arg (TREE_VALUE (arg), TREE_TYPE (init), init))
11499 cp_pedwarn ("invalid type `%T' for default argument to `%T'",
11500 TREE_TYPE (init), TREE_VALUE (arg));
11501 TREE_PURPOSE (arg) = init;
11508 tree t = FUNCTION_ARG_CHAIN (d);
11509 if (DECL_CONSTRUCTOR_P (d)
11510 && TYPE_USES_VIRTUAL_BASECLASSES (DECL_CONTEXT (d)))
11511 t = TREE_CHAIN (t);
11512 if (t && TREE_CODE (TREE_VALUE (t)) == REFERENCE_TYPE
11513 && (TYPE_MAIN_VARIANT (TREE_TYPE (TREE_VALUE (t)))
11514 == DECL_CLASS_CONTEXT (d))
11515 && (TREE_CHAIN (t) == NULL_TREE
11516 || TREE_CHAIN (t) == void_list_node
11517 || TREE_PURPOSE (TREE_CHAIN (t))))
11522 /* These memoizing functions keep track of special properties which
11523 a class may have. `grok_ctor_properties' notices whether a class
11524 has a constructor of the form X(X&), and also complains
11525 if the class has a constructor of the form X(X).
11526 `grok_op_properties' takes notice of the various forms of
11527 operator= which are defined, as well as what sorts of type conversion
11528 may apply. Both functions take a FUNCTION_DECL as an argument. */
11531 grok_ctor_properties (ctype, decl)
11534 tree parmtypes = FUNCTION_ARG_CHAIN (decl);
11535 tree parmtype = parmtypes ? TREE_VALUE (parmtypes) : void_type_node;
11537 /* When a type has virtual baseclasses, a magical first int argument is
11538 added to any ctor so we can tell if the class has been initialized
11539 yet. This could screw things up in this function, so we deliberately
11540 ignore the leading int if we're in that situation. */
11541 if (TYPE_USES_VIRTUAL_BASECLASSES (ctype))
11543 my_friendly_assert (parmtypes
11544 && TREE_VALUE (parmtypes) == integer_type_node,
11546 parmtypes = TREE_CHAIN (parmtypes);
11547 parmtype = TREE_VALUE (parmtypes);
11552 A non-template constructor for class X is a copy constructor if
11553 its first parameter is of type X&, const X&, volatile X& or const
11554 volatile X&, and either there are no other parameters or else all
11555 other parameters have default arguments. */
11556 if (TREE_CODE (parmtype) == REFERENCE_TYPE
11557 && TYPE_MAIN_VARIANT (TREE_TYPE (parmtype)) == ctype
11558 && (TREE_CHAIN (parmtypes) == NULL_TREE
11559 || TREE_CHAIN (parmtypes) == void_list_node
11560 || TREE_PURPOSE (TREE_CHAIN (parmtypes)))
11561 && !(DECL_TEMPLATE_INSTANTIATION (decl)
11562 && is_member_template (DECL_TI_TEMPLATE (decl))))
11564 TYPE_HAS_INIT_REF (ctype) = 1;
11565 if (CP_TYPE_CONST_P (TREE_TYPE (parmtype)))
11566 TYPE_HAS_CONST_INIT_REF (ctype) = 1;
11570 A declaration of a constructor for a class X is ill-formed if its
11571 first parameter is of type (optionally cv-qualified) X and either
11572 there are no other parameters or else all other parameters have
11575 We *don't* complain about member template instantiations that
11576 have this form, though; they can occur as we try to decide what
11577 constructor to use during overload resolution. Since overload
11578 resolution will never prefer such a constructor to the
11579 non-template copy constructor (which is either explicitly or
11580 implicitly defined), there's no need to worry about their
11581 existence. Theoretically, they should never even be
11582 instantiated, but that's hard to forestall. */
11583 else if (TYPE_MAIN_VARIANT (parmtype) == ctype
11584 && (TREE_CHAIN (parmtypes) == NULL_TREE
11585 || TREE_CHAIN (parmtypes) == void_list_node
11586 || TREE_PURPOSE (TREE_CHAIN (parmtypes)))
11587 && !(DECL_TEMPLATE_INSTANTIATION (decl)
11588 && is_member_template (DECL_TI_TEMPLATE (decl))))
11590 cp_error ("invalid constructor; you probably meant `%T (const %T&)'",
11592 SET_IDENTIFIER_ERROR_LOCUS (DECL_NAME (decl), ctype);
11595 else if (TREE_CODE (parmtype) == VOID_TYPE
11596 || TREE_PURPOSE (parmtypes) != NULL_TREE)
11597 TYPE_HAS_DEFAULT_CONSTRUCTOR (ctype) = 1;
11602 /* An operator with this name can be either unary or binary. */
11608 return (name == ansi_opname [(int) INDIRECT_REF]
11609 || name == ansi_opname [(int) ADDR_EXPR]
11610 || name == ansi_opname [(int) NEGATE_EXPR]
11611 || name == ansi_opname[(int) POSTINCREMENT_EXPR]
11612 || name == ansi_opname[(int) POSTDECREMENT_EXPR]
11613 || name == ansi_opname [(int) CONVERT_EXPR]);
11616 /* An operator with this name can only be unary. */
11622 return (name == ansi_opname [(int) TRUTH_NOT_EXPR]
11623 || name == ansi_opname [(int) BIT_NOT_EXPR]
11624 || name == ansi_opname [(int) COMPONENT_REF]
11625 || IDENTIFIER_TYPENAME_P (name));
11628 /* Do a little sanity-checking on how they declared their operator. */
11631 grok_op_properties (decl, virtualp, friendp)
11633 int virtualp, friendp;
11635 tree argtypes = TYPE_ARG_TYPES (TREE_TYPE (decl));
11636 int methodp = (TREE_CODE (TREE_TYPE (decl)) == METHOD_TYPE);
11637 tree name = DECL_NAME (decl);
11639 if (current_class_type == NULL_TREE)
11646 A user-declared copy assignment operator X::operator= is a
11647 non-static non-template member function of class X with
11648 exactly one parameter of type X, X&, const X&, volatile X& or
11649 const volatile X&. */
11650 if (name == ansi_opname[(int) MODIFY_EXPR]
11651 && !(DECL_TEMPLATE_INSTANTIATION (decl)
11652 && is_member_template (DECL_TI_TEMPLATE (decl))))
11654 else if (name == ansi_opname[(int) CALL_EXPR])
11655 TYPE_OVERLOADS_CALL_EXPR (current_class_type) = 1;
11656 else if (name == ansi_opname[(int) ARRAY_REF])
11657 TYPE_OVERLOADS_ARRAY_REF (current_class_type) = 1;
11658 else if (name == ansi_opname[(int) COMPONENT_REF]
11659 || name == ansi_opname[(int) MEMBER_REF])
11660 TYPE_OVERLOADS_ARROW (current_class_type) = 1;
11661 else if (name == ansi_opname[(int) NEW_EXPR])
11662 TYPE_GETS_NEW (current_class_type) |= 1;
11663 else if (name == ansi_opname[(int) DELETE_EXPR])
11664 TYPE_GETS_DELETE (current_class_type) |= 1;
11665 else if (name == ansi_opname[(int) VEC_NEW_EXPR])
11666 TYPE_GETS_NEW (current_class_type) |= 2;
11667 else if (name == ansi_opname[(int) VEC_DELETE_EXPR])
11668 TYPE_GETS_DELETE (current_class_type) |= 2;
11671 if (name == ansi_opname[(int) NEW_EXPR]
11672 || name == ansi_opname[(int) VEC_NEW_EXPR])
11674 /* When the compiler encounters the definition of A::operator new, it
11675 doesn't look at the class declaration to find out if it's static. */
11677 revert_static_member_fn (&decl, NULL, NULL);
11679 /* Take care of function decl if we had syntax errors. */
11680 if (argtypes == NULL_TREE)
11682 = build_function_type (ptr_type_node,
11683 hash_tree_chain (integer_type_node,
11686 TREE_TYPE (decl) = coerce_new_type (TREE_TYPE (decl));
11688 else if (name == ansi_opname[(int) DELETE_EXPR]
11689 || name == ansi_opname[(int) VEC_DELETE_EXPR])
11692 revert_static_member_fn (&decl, NULL, NULL);
11694 if (argtypes == NULL_TREE)
11696 = build_function_type (void_type_node,
11697 hash_tree_chain (ptr_type_node,
11701 TREE_TYPE (decl) = coerce_delete_type (TREE_TYPE (decl));
11703 if (! friendp && name == ansi_opname[(int) VEC_DELETE_EXPR]
11704 && (TREE_CHAIN (TYPE_ARG_TYPES (TREE_TYPE (decl)))
11705 != void_list_node))
11706 TYPE_VEC_DELETE_TAKES_SIZE (current_class_type) = 1;
11711 /* An operator function must either be a non-static member function
11712 or have at least one parameter of a class, a reference to a class,
11713 an enumeration, or a reference to an enumeration. 13.4.0.6 */
11714 if (! methodp || DECL_STATIC_FUNCTION_P (decl))
11716 if (IDENTIFIER_TYPENAME_P (name)
11717 || name == ansi_opname[(int) CALL_EXPR]
11718 || name == ansi_opname[(int) MODIFY_EXPR]
11719 || name == ansi_opname[(int) COMPONENT_REF]
11720 || name == ansi_opname[(int) ARRAY_REF])
11721 cp_error ("`%D' must be a nonstatic member function", decl);
11726 if (DECL_STATIC_FUNCTION_P (decl))
11727 cp_error ("`%D' must be either a non-static member function or a non-member function", decl);
11730 for (; TREE_CODE (TREE_VALUE (p)) != VOID_TYPE ; p = TREE_CHAIN (p))
11732 tree arg = TREE_VALUE (p);
11733 if (TREE_CODE (arg) == REFERENCE_TYPE)
11734 arg = TREE_TYPE (arg);
11736 /* This lets bad template code slip through. */
11737 if (IS_AGGR_TYPE (arg)
11738 || TREE_CODE (arg) == ENUMERAL_TYPE
11739 || TREE_CODE (arg) == TEMPLATE_TYPE_PARM
11740 || TREE_CODE (arg) == TEMPLATE_TEMPLATE_PARM)
11744 ("`%D' must have an argument of class or enumerated type",
11751 if (name == ansi_opname[(int) CALL_EXPR])
11752 return; /* No restrictions on args. */
11754 if (IDENTIFIER_TYPENAME_P (name) && ! DECL_TEMPLATE_INFO (decl))
11756 tree t = TREE_TYPE (name);
11757 if (TREE_CODE (t) == VOID_TYPE)
11758 pedwarn ("void is not a valid type conversion operator");
11759 else if (! friendp)
11761 int ref = (TREE_CODE (t) == REFERENCE_TYPE);
11762 const char *what = 0;
11764 t = TYPE_MAIN_VARIANT (TREE_TYPE (t));
11766 if (t == current_class_type)
11767 what = "the same type";
11768 /* Don't force t to be complete here. */
11769 else if (IS_AGGR_TYPE (t)
11771 && DERIVED_FROM_P (t, current_class_type))
11772 what = "a base class";
11775 warning ("conversion to %s%s will never use a type conversion operator",
11776 ref ? "a reference to " : "", what);
11780 if (name == ansi_opname[(int) MODIFY_EXPR])
11784 if (list_length (argtypes) != 3 && methodp)
11786 cp_error ("`%D' must take exactly one argument", decl);
11789 parmtype = TREE_VALUE (TREE_CHAIN (argtypes));
11791 if (copy_assignment_arg_p (parmtype, virtualp)
11794 TYPE_HAS_ASSIGN_REF (current_class_type) = 1;
11795 if (TREE_CODE (parmtype) != REFERENCE_TYPE
11796 || CP_TYPE_CONST_P (TREE_TYPE (parmtype)))
11797 TYPE_HAS_CONST_ASSIGN_REF (current_class_type) = 1;
11800 else if (name == ansi_opname[(int) COND_EXPR])
11803 cp_error ("ANSI C++ prohibits overloading operator ?:");
11805 else if (ambi_op_p (name))
11807 if (list_length (argtypes) == 2)
11809 else if (list_length (argtypes) == 3)
11811 if ((name == ansi_opname[(int) POSTINCREMENT_EXPR]
11812 || name == ansi_opname[(int) POSTDECREMENT_EXPR])
11813 && ! processing_template_decl
11814 && ! same_type_p (TREE_VALUE (TREE_CHAIN (argtypes)), integer_type_node))
11817 cp_error ("postfix `%D' must take `int' as its argument",
11821 ("postfix `%D' must take `int' as its second argument",
11828 cp_error ("`%D' must take either zero or one argument", decl);
11830 cp_error ("`%D' must take either one or two arguments", decl);
11833 /* More Effective C++ rule 6. */
11835 && (name == ansi_opname[(int) POSTINCREMENT_EXPR]
11836 || name == ansi_opname[(int) POSTDECREMENT_EXPR]))
11838 tree arg = TREE_VALUE (argtypes);
11839 tree ret = TREE_TYPE (TREE_TYPE (decl));
11840 if (methodp || TREE_CODE (arg) == REFERENCE_TYPE)
11841 arg = TREE_TYPE (arg);
11842 arg = TYPE_MAIN_VARIANT (arg);
11843 if (list_length (argtypes) == 2)
11845 if (TREE_CODE (ret) != REFERENCE_TYPE
11846 || !same_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (ret)),
11848 cp_warning ("prefix `%D' should return `%T'", decl,
11849 build_reference_type (arg));
11853 if (!same_type_p (TYPE_MAIN_VARIANT (ret), arg))
11854 cp_warning ("postfix `%D' should return `%T'", decl, arg);
11858 else if (unary_op_p (name))
11860 if (list_length (argtypes) != 2)
11863 cp_error ("`%D' must take `void'", decl);
11865 cp_error ("`%D' must take exactly one argument", decl);
11868 else /* if (binary_op_p (name)) */
11870 if (list_length (argtypes) != 3)
11873 cp_error ("`%D' must take exactly one argument", decl);
11875 cp_error ("`%D' must take exactly two arguments", decl);
11878 /* More Effective C++ rule 7. */
11880 && (name == ansi_opname [TRUTH_ANDIF_EXPR]
11881 || name == ansi_opname [TRUTH_ORIF_EXPR]
11882 || name == ansi_opname [COMPOUND_EXPR]))
11883 cp_warning ("user-defined `%D' always evaluates both arguments",
11887 /* Effective C++ rule 23. */
11889 && list_length (argtypes) == 3
11890 && (name == ansi_opname [PLUS_EXPR]
11891 || name == ansi_opname [MINUS_EXPR]
11892 || name == ansi_opname [TRUNC_DIV_EXPR]
11893 || name == ansi_opname [MULT_EXPR])
11894 && TREE_CODE (TREE_TYPE (TREE_TYPE (decl))) == REFERENCE_TYPE)
11895 cp_warning ("`%D' should return by value", decl);
11899 for (; argtypes != void_list_node ; argtypes = TREE_CHAIN (argtypes))
11900 if (TREE_PURPOSE (argtypes))
11902 TREE_PURPOSE (argtypes) = NULL_TREE;
11903 if (name == ansi_opname[(int) POSTINCREMENT_EXPR]
11904 || name == ansi_opname[(int) POSTDECREMENT_EXPR])
11907 cp_pedwarn ("`%D' cannot have default arguments", decl);
11910 cp_error ("`%D' cannot have default arguments", decl);
11915 static const char *
11917 enum tag_types code;
11930 my_friendly_abort (981122);
11934 /* Get the struct, enum or union (CODE says which) with tag NAME.
11935 Define the tag as a forward-reference if it is not defined.
11937 C++: If a class derivation is given, process it here, and report
11938 an error if multiple derivation declarations are not identical.
11940 If this is a definition, come in through xref_tag and only look in
11941 the current frame for the name (since C++ allows new names in any
11945 xref_tag (code_type_node, name, globalize)
11946 tree code_type_node;
11950 enum tag_types tag_code;
11951 enum tree_code code;
11952 register tree ref, t;
11953 struct binding_level *b = current_binding_level;
11955 tree attributes = NULL_TREE;
11956 tree context = NULL_TREE;
11958 /* If we are called from the parser, code_type_node will sometimes be a
11959 TREE_LIST. This indicates that the user wrote
11960 "class __attribute__ ((foo)) bar". Extract the attributes so we can
11962 if (TREE_CODE (code_type_node) == TREE_LIST)
11964 attributes = TREE_PURPOSE (code_type_node);
11965 code_type_node = TREE_VALUE (code_type_node);
11968 tag_code = (enum tag_types) TREE_INT_CST_LOW (code_type_node);
11973 code = RECORD_TYPE;
11979 code = ENUMERAL_TYPE;
11982 my_friendly_abort (18);
11985 /* If a cross reference is requested, look up the type
11986 already defined for this tag and return it. */
11987 if (TREE_CODE_CLASS (TREE_CODE (name)) == 't')
11990 name = TYPE_IDENTIFIER (t);
11994 t = IDENTIFIER_TYPE_VALUE (name);
11996 if (t && TREE_CODE (t) != code && TREE_CODE (t) != TEMPLATE_TYPE_PARM
11997 && TREE_CODE (t) != TEMPLATE_TEMPLATE_PARM)
12002 /* If we know we are defining this tag, only look it up in
12003 this scope and don't try to find it as a type. */
12004 ref = lookup_tag (code, name, b, 1);
12010 /* [dcl.type.elab] If the identifier resolves to a
12011 typedef-name or a template type-parameter, the
12012 elaborated-type-specifier is ill-formed. */
12013 if (t != TYPE_MAIN_VARIANT (t)
12014 || (CLASS_TYPE_P (t) && TYPE_WAS_ANONYMOUS (t)))
12015 cp_pedwarn ("using typedef-name `%D' after `%s'",
12016 TYPE_NAME (t), tag_name (tag_code));
12017 else if (TREE_CODE (t) == TEMPLATE_TYPE_PARM)
12018 cp_error ("using template type parameter `%T' after `%s'",
12019 t, tag_name (tag_code));
12024 ref = lookup_tag (code, name, b, 0);
12028 /* Try finding it as a type declaration. If that wins,
12030 ref = lookup_name (name, 1);
12032 if (ref != NULL_TREE
12033 && processing_template_decl
12034 && DECL_CLASS_TEMPLATE_P (ref)
12035 && template_class_depth (current_class_type) == 0)
12036 /* Since GLOBALIZE is true, we're declaring a global
12037 template, so we want this type. */
12038 ref = DECL_RESULT (ref);
12040 if (ref && TREE_CODE (ref) == TYPE_DECL
12041 && TREE_CODE (TREE_TYPE (ref)) == code)
12042 ref = TREE_TYPE (ref);
12047 if (ref && current_class_type
12048 && template_class_depth (current_class_type)
12049 && PROCESSING_REAL_TEMPLATE_DECL_P ())
12051 /* Since GLOBALIZE is non-zero, we are not looking at a
12052 definition of this tag. Since, in addition, we are currently
12053 processing a (member) template declaration of a template
12054 class, we must be very careful; consider:
12061 { template <class V>
12062 friend struct S1; };
12064 Here, the S2::S1 declaration should not be confused with the
12065 outer declaration. In particular, the inner version should
12066 have a template parameter of level 2, not level 1. This
12067 would be particularly important if the member declaration
12070 template <class V = U> friend struct S1;
12072 say, when we should tsubst into `U' when instantiating
12073 S2. On the other hand, when presented with:
12083 we must find the inner binding eventually. We
12084 accomplish this by making sure that the new type we
12085 create to represent this declaration has the right
12087 context = TYPE_CONTEXT (ref);
12094 /* If no such tag is yet defined, create a forward-reference node
12095 and record it as the "definition".
12096 When a real declaration of this type is found,
12097 the forward-reference will be altered into a real type. */
12098 if (code == ENUMERAL_TYPE)
12100 cp_error ("use of enum `%#D' without previous declaration", name);
12102 ref = make_node (ENUMERAL_TYPE);
12104 /* Give the type a default layout like unsigned int
12105 to avoid crashing if it does not get defined. */
12106 TYPE_MODE (ref) = TYPE_MODE (unsigned_type_node);
12107 TYPE_ALIGN (ref) = TYPE_ALIGN (unsigned_type_node);
12108 TREE_UNSIGNED (ref) = 1;
12109 TYPE_PRECISION (ref) = TYPE_PRECISION (unsigned_type_node);
12110 TYPE_MIN_VALUE (ref) = TYPE_MIN_VALUE (unsigned_type_node);
12111 TYPE_MAX_VALUE (ref) = TYPE_MAX_VALUE (unsigned_type_node);
12113 /* Enable us to recognize when a type is created in class context.
12114 To do nested classes correctly, this should probably be cleared
12115 out when we leave this classes scope. Currently this in only
12116 done in `start_enum'. */
12118 pushtag (name, ref, globalize);
12122 struct binding_level *old_b = class_binding_level;
12124 ref = make_aggr_type (code);
12125 TYPE_CONTEXT (ref) = context;
12127 #ifdef NONNESTED_CLASSES
12128 /* Class types don't nest the way enums do. */
12129 class_binding_level = (struct binding_level *)0;
12131 pushtag (name, ref, globalize);
12132 class_binding_level = old_b;
12137 /* If it no longer looks like a nested type, make sure it's
12139 If it is not an IDENTIFIER, this is not a declaration */
12140 if (b->namespace_p && !class_binding_level
12141 && TREE_CODE (name) == IDENTIFIER_NODE
12142 && IDENTIFIER_NAMESPACE_VALUE (name) == NULL_TREE)
12143 SET_IDENTIFIER_NAMESPACE_VALUE (name, TYPE_NAME (ref));
12145 if (!globalize && processing_template_decl && IS_AGGR_TYPE (ref))
12146 redeclare_class_template (ref, current_template_parms);
12149 /* Until the type is defined, tentatively accept whatever
12150 structure tag the user hands us. */
12151 if (TYPE_SIZE (ref) == NULL_TREE
12152 && ref != current_class_type
12153 /* Have to check this, in case we have contradictory tag info. */
12154 && IS_AGGR_TYPE_CODE (TREE_CODE (ref)))
12156 if (tag_code == class_type)
12157 CLASSTYPE_DECLARED_CLASS (ref) = 1;
12158 else if (tag_code == record_type)
12159 CLASSTYPE_DECLARED_CLASS (ref) = 0;
12162 TREE_TYPE (ref) = attributes;
12168 xref_tag_from_type (old, id, globalize)
12172 tree code_type_node;
12174 if (TREE_CODE (old) == RECORD_TYPE)
12175 code_type_node = (CLASSTYPE_DECLARED_CLASS (old)
12176 ? class_type_node : record_type_node);
12178 code_type_node = union_type_node;
12180 if (id == NULL_TREE)
12181 id = TYPE_IDENTIFIER (old);
12183 return xref_tag (code_type_node, id, globalize);
12186 /* REF is a type (named NAME), for which we have just seen some
12187 baseclasses. BINFO is a list of those baseclasses; the
12188 TREE_PURPOSE is an access_* node, and the TREE_VALUE is the type of
12189 the base-class. CODE_TYPE_NODE indicates whether REF is a class,
12190 struct, or union. */
12193 xref_basetypes (code_type_node, name, ref, binfo)
12194 tree code_type_node;
12198 /* In the declaration `A : X, Y, ... Z' we mark all the types
12199 (A, X, Y, ..., Z) so we can check for duplicates. */
12204 enum tag_types tag_code = (enum tag_types) TREE_INT_CST_LOW (code_type_node);
12206 if (tag_code == union_type)
12208 cp_error ("derived union `%T' invalid", ref);
12212 len = list_length (binfo);
12214 /* First, make sure that any templates in base-classes are
12215 instantiated. This ensures that if we call ourselves recursively
12216 we do not get confused about which classes are marked and which
12218 for (base = binfo; base; base = TREE_CHAIN (base))
12219 complete_type (TREE_VALUE (base));
12221 SET_CLASSTYPE_MARKED (ref);
12222 BINFO_BASETYPES (TYPE_BINFO (ref)) = binfos = make_tree_vec (len);
12224 for (i = 0; binfo; binfo = TREE_CHAIN (binfo))
12226 /* The base of a derived struct is public by default. */
12228 = (TREE_PURPOSE (binfo) == access_public_node
12229 || TREE_PURPOSE (binfo) == access_public_virtual_node
12230 || (tag_code != class_type
12231 && (TREE_PURPOSE (binfo) == access_default_node
12232 || TREE_PURPOSE (binfo) == access_default_virtual_node)));
12234 = (TREE_PURPOSE (binfo) == access_protected_node
12235 || TREE_PURPOSE (binfo) == access_protected_virtual_node);
12237 = (TREE_PURPOSE (binfo) == access_private_virtual_node
12238 || TREE_PURPOSE (binfo) == access_protected_virtual_node
12239 || TREE_PURPOSE (binfo) == access_public_virtual_node
12240 || TREE_PURPOSE (binfo) == access_default_virtual_node);
12241 tree basetype = TREE_VALUE (binfo);
12244 if (basetype && TREE_CODE (basetype) == TYPE_DECL)
12245 basetype = TREE_TYPE (basetype);
12247 || (TREE_CODE (basetype) != RECORD_TYPE
12248 && TREE_CODE (basetype) != TYPENAME_TYPE
12249 && TREE_CODE (basetype) != TEMPLATE_TYPE_PARM
12250 && TREE_CODE (basetype) != TEMPLATE_TEMPLATE_PARM))
12252 cp_error ("base type `%T' fails to be a struct or class type",
12253 TREE_VALUE (binfo));
12257 GNU_xref_hier (name, basetype, via_public, via_virtual, 0);
12259 /* This code replaces similar code in layout_basetypes.
12260 We put the complete_type first for implicit `typename'. */
12261 if (TYPE_SIZE (basetype) == NULL_TREE
12262 && ! (current_template_parms && uses_template_parms (basetype)))
12264 cp_error ("base class `%T' has incomplete type", basetype);
12269 if (CLASSTYPE_MARKED (basetype))
12271 if (basetype == ref)
12272 cp_error ("recursive type `%T' undefined", basetype);
12274 cp_error ("duplicate base type `%T' invalid", basetype);
12278 if (TYPE_FOR_JAVA (basetype)
12279 && (current_lang_stack
12280 == &VARRAY_TREE (current_lang_base, 0)))
12281 TYPE_FOR_JAVA (ref) = 1;
12283 /* Note that the BINFO records which describe individual
12284 inheritances are *not* shared in the lattice! They
12285 cannot be shared because a given baseclass may be
12286 inherited with different `accessibility' by different
12287 derived classes. (Each BINFO record describing an
12288 individual inheritance contains flags which say what
12289 the `accessibility' of that particular inheritance is.) */
12292 = make_binfo (integer_zero_node, basetype,
12293 CLASS_TYPE_P (basetype)
12294 ? TYPE_BINFO_VTABLE (basetype) : NULL_TREE,
12295 CLASS_TYPE_P (basetype)
12296 ? TYPE_BINFO_VIRTUALS (basetype) : NULL_TREE);
12298 TREE_VEC_ELT (binfos, i) = base_binfo;
12299 TREE_VIA_PUBLIC (base_binfo) = via_public;
12300 TREE_VIA_PROTECTED (base_binfo) = via_protected;
12301 TREE_VIA_VIRTUAL (base_binfo) = via_virtual;
12302 BINFO_INHERITANCE_CHAIN (base_binfo) = TYPE_BINFO (ref);
12304 /* We need to unshare the binfos now so that lookups during class
12305 definition work. */
12306 unshare_base_binfos (base_binfo);
12308 SET_CLASSTYPE_MARKED (basetype);
12310 /* We are free to modify these bits because they are meaningless
12311 at top level, and BASETYPE is a top-level type. */
12312 if (via_virtual || TYPE_USES_VIRTUAL_BASECLASSES (basetype))
12314 TYPE_USES_VIRTUAL_BASECLASSES (ref) = 1;
12315 TYPE_USES_COMPLEX_INHERITANCE (ref) = 1;
12318 if (CLASS_TYPE_P (basetype))
12320 TYPE_GETS_NEW (ref) |= TYPE_GETS_NEW (basetype);
12321 TYPE_GETS_DELETE (ref) |= TYPE_GETS_DELETE (basetype);
12328 TREE_VEC_LENGTH (binfos) = i;
12330 BINFO_BASETYPES (TYPE_BINFO (ref)) = NULL_TREE;
12333 TYPE_USES_MULTIPLE_INHERITANCE (ref) = 1;
12336 tree basetype = BINFO_TYPE (TREE_VEC_ELT (binfos, 0));
12338 if (CLASS_TYPE_P (basetype))
12339 TYPE_USES_MULTIPLE_INHERITANCE (ref)
12340 = TYPE_USES_MULTIPLE_INHERITANCE (basetype);
12343 if (TYPE_USES_MULTIPLE_INHERITANCE (ref))
12344 TYPE_USES_COMPLEX_INHERITANCE (ref) = 1;
12346 /* Unmark all the types. */
12348 CLEAR_CLASSTYPE_MARKED (BINFO_TYPE (TREE_VEC_ELT (binfos, i)));
12349 CLEAR_CLASSTYPE_MARKED (ref);
12351 /* Now that we know all the base-classes, set up the list of virtual
12353 CLASSTYPE_VBASECLASSES (ref) = get_vbase_types (ref);
12357 /* Begin compiling the definition of an enumeration type.
12358 NAME is its name (or null if anonymous).
12359 Returns the type object, as yet incomplete.
12360 Also records info about it so that build_enumerator
12361 may be used to declare the individual values as they are read. */
12367 register tree enumtype = NULL_TREE;
12368 struct binding_level *b = current_binding_level;
12370 /* If this is the real definition for a previous forward reference,
12371 fill in the contents in the same object that used to be the
12372 forward reference. */
12374 if (name != NULL_TREE)
12375 enumtype = lookup_tag (ENUMERAL_TYPE, name, b, 1);
12377 if (enumtype != NULL_TREE && TREE_CODE (enumtype) == ENUMERAL_TYPE)
12379 cp_error ("multiple definition of `%#T'", enumtype);
12380 cp_error_at ("previous definition here", enumtype);
12381 /* Clear out TYPE_VALUES, and start again. */
12382 TYPE_VALUES (enumtype) = NULL_TREE;
12386 enumtype = make_node (ENUMERAL_TYPE);
12387 pushtag (name, enumtype, 0);
12390 if (current_class_type)
12391 TREE_ADDRESSABLE (b->tags) = 1;
12393 GNU_xref_decl (current_function_decl, enumtype);
12397 /* After processing and defining all the values of an enumeration type,
12398 install their decls in the enumeration type and finish it off.
12399 ENUMTYPE is the type object and VALUES a list of name-value pairs.
12400 Returns ENUMTYPE. */
12403 finish_enum (enumtype)
12406 register tree minnode = NULL_TREE, maxnode = NULL_TREE;
12407 /* Calculate the maximum value of any enumerator in this type. */
12409 tree values = TYPE_VALUES (enumtype);
12414 for (pair = values; pair; pair = TREE_CHAIN (pair))
12419 /* The TREE_VALUE is a CONST_DECL for this enumeration
12421 decl = TREE_VALUE (pair);
12425 Following the closing brace of an enum-specifier, each
12426 enumerator has the type of its enumeration. Prior to the
12427 closing brace, the type of each enumerator is the type of
12428 its initializing value. */
12429 TREE_TYPE (decl) = enumtype;
12431 /* The DECL_INITIAL will be NULL if we are processing a
12432 template declaration and this enumeration constant had no
12433 explicit initializer. */
12434 value = DECL_INITIAL (decl);
12435 if (value && !processing_template_decl)
12437 /* Set the TREE_TYPE for the VALUE as well. That's so
12438 that when we call decl_constant_value we get an
12439 entity of the right type (but with the constant
12440 value). Since we shouldn't ever call
12441 decl_constant_value on a template type, there's no
12442 reason to do that when processing_template_decl.
12443 And, if the expression is something like a
12444 TEMPLATE_PARM_INDEX or a CAST_EXPR doing so will
12445 wreak havoc on the intended type of the expression.
12447 Of course, there's also no point in trying to compute
12448 minimum or maximum values if we're in a template. */
12449 TREE_TYPE (value) = enumtype;
12452 minnode = maxnode = value;
12453 else if (tree_int_cst_lt (maxnode, value))
12455 else if (tree_int_cst_lt (value, minnode))
12459 if (processing_template_decl)
12460 /* If this is just a template, leave the CONST_DECL
12461 alone. That way tsubst_copy will find CONST_DECLs for
12462 CONST_DECLs, and not INTEGER_CSTs. */
12465 /* In the list we're building up, we want the enumeration
12466 values, not the CONST_DECLs. */
12467 TREE_VALUE (pair) = value;
12471 maxnode = minnode = integer_zero_node;
12473 TYPE_VALUES (enumtype) = nreverse (values);
12475 if (processing_template_decl)
12477 tree scope = current_scope ();
12478 if (scope && TREE_CODE (scope) == FUNCTION_DECL)
12479 add_tree (build_min (TAG_DEFN, enumtype));
12483 int unsignedp = tree_int_cst_sgn (minnode) >= 0;
12484 int lowprec = min_precision (minnode, unsignedp);
12485 int highprec = min_precision (maxnode, unsignedp);
12486 int precision = MAX (lowprec, highprec);
12489 TYPE_SIZE (enumtype) = NULL_TREE;
12491 /* Set TYPE_MIN_VALUE and TYPE_MAX_VALUE according to `precision'. */
12493 TYPE_PRECISION (enumtype) = precision;
12495 fixup_unsigned_type (enumtype);
12497 fixup_signed_type (enumtype);
12499 if (flag_short_enums || (precision > TYPE_PRECISION (integer_type_node)))
12500 /* Use the width of the narrowest normal C type which is wide
12502 TYPE_PRECISION (enumtype) = TYPE_PRECISION (type_for_size
12505 TYPE_PRECISION (enumtype) = TYPE_PRECISION (integer_type_node);
12507 TYPE_SIZE (enumtype) = 0;
12508 layout_type (enumtype);
12510 /* Fix up all variant types of this enum type. */
12511 for (tem = TYPE_MAIN_VARIANT (enumtype); tem;
12512 tem = TYPE_NEXT_VARIANT (tem))
12514 TYPE_VALUES (tem) = TYPE_VALUES (enumtype);
12515 TYPE_MIN_VALUE (tem) = TYPE_MIN_VALUE (enumtype);
12516 TYPE_MAX_VALUE (tem) = TYPE_MAX_VALUE (enumtype);
12517 TYPE_SIZE (tem) = TYPE_SIZE (enumtype);
12518 TYPE_SIZE_UNIT (tem) = TYPE_SIZE_UNIT (enumtype);
12519 TYPE_MODE (tem) = TYPE_MODE (enumtype);
12520 TYPE_PRECISION (tem) = TYPE_PRECISION (enumtype);
12521 TYPE_ALIGN (tem) = TYPE_ALIGN (enumtype);
12522 TREE_UNSIGNED (tem) = TREE_UNSIGNED (enumtype);
12525 /* Finish debugging output for this type. */
12526 rest_of_type_compilation (enumtype, namespace_bindings_p ());
12532 /* Build and install a CONST_DECL for an enumeration constant of the
12533 enumeration type ENUMTYPE whose NAME and VALUE (if any) are provided.
12534 Assignment of sequential values by default is handled here. */
12537 build_enumerator (name, value, enumtype)
12547 /* Remove no-op casts from the value. */
12549 STRIP_TYPE_NOPS (value);
12551 if (! processing_template_decl)
12553 /* Validate and default VALUE. */
12554 if (value != NULL_TREE)
12556 if (TREE_READONLY_DECL_P (value))
12557 value = decl_constant_value (value);
12559 if (TREE_CODE (value) == INTEGER_CST)
12561 value = default_conversion (value);
12562 constant_expression_warning (value);
12566 cp_error ("enumerator value for `%D' not integer constant", name);
12571 /* Default based on previous value. */
12572 if (value == NULL_TREE && ! processing_template_decl)
12576 if (TYPE_VALUES (enumtype))
12578 /* The next value is the previous value ... */
12579 prev_value = DECL_INITIAL (TREE_VALUE (TYPE_VALUES (enumtype)));
12580 /* ... plus one. */
12581 value = build_binary_op_nodefault (PLUS_EXPR,
12586 if (tree_int_cst_lt (value, prev_value))
12587 cp_error ("overflow in enumeration values at `%D'", name);
12590 value = integer_zero_node;
12593 /* Remove no-op casts from the value. */
12595 STRIP_TYPE_NOPS (value);
12597 /* To fix MAX_VAL enum consts. (bkoz) */
12598 TREE_TYPE (value) = integer_type_node;
12602 /* We always have to copy here; not all INTEGER_CSTs are unshared.
12603 Even in other cases, we will later (in finish_enum) be setting
12604 the type of VALUE. But, we don't need to make a copy if this
12605 VALUE is one of the enumeration constants for this same
12606 enumeration type. */
12607 for (values = TYPE_VALUES (enumtype); values; values = TREE_CHAIN (values))
12608 if (TREE_VALUE (values) == value)
12610 /* If we didn't break out of the loop, then we do need a copy. */
12611 if (!values && value)
12612 value = copy_node (value);
12614 /* C++ associates enums with global, function, or class declarations. */
12615 context = current_scope ();
12617 /* Build the actual enumeration constant. Note that the enumeration
12618 constants have the type of their initializers until the
12619 enumeration is complete:
12623 Following the closing brace of an enum-specifier, each enumer-
12624 ator has the type of its enumeration. Prior to the closing
12625 brace, the type of each enumerator is the type of its
12626 initializing value.
12628 In finish_enum we will reset the type. Of course, if we're
12629 processing a template, there may be no value. */
12630 type = value ? TREE_TYPE (value) : NULL_TREE;
12632 if (context && context == current_class_type)
12633 /* This enum declaration is local to the class. We need the full
12634 lang_decl so that we can record DECL_CLASS_CONTEXT, for example. */
12635 decl = build_lang_decl (CONST_DECL, name, type);
12637 /* It's a global enum, or it's local to a function. (Note local to
12638 a function could mean local to a class method. */
12639 decl = build_decl (CONST_DECL, name, type);
12641 DECL_CONTEXT (decl) = FROB_CONTEXT (context);
12642 DECL_INITIAL (decl) = value;
12643 TREE_READONLY (decl) = 1;
12645 if (context && context == current_class_type)
12646 /* In something like `struct S { enum E { i = 7 }; };' we put `i'
12647 on the TYPE_FIELDS list for `S'. (That's so that you can say
12648 things like `S::i' later.) */
12649 finish_member_declaration (decl);
12653 GNU_xref_decl (current_function_decl, decl);
12656 /* Add this enumeration constant to the list for this type. */
12657 TYPE_VALUES (enumtype) = tree_cons (name, decl, TYPE_VALUES (enumtype));
12661 static int function_depth;
12663 /* We're defining DECL. Make sure that it's type is OK. */
12666 check_function_type (decl)
12669 tree fntype = TREE_TYPE (decl);
12671 /* In a function definition, arg types must be complete. */
12672 require_complete_types_for_parms (current_function_parms);
12674 if (TYPE_SIZE (complete_type (TREE_TYPE (fntype))) == NULL_TREE)
12676 cp_error ("return type `%#T' is incomplete", TREE_TYPE (fntype));
12678 /* Make it return void instead, but don't change the
12679 type of the DECL_RESULT, in case we have a named return value. */
12680 if (TREE_CODE (fntype) == METHOD_TYPE)
12682 tree ctype = TREE_TYPE (TREE_VALUE (TYPE_ARG_TYPES (fntype)));
12684 = build_cplus_method_type (ctype,
12686 FUNCTION_ARG_CHAIN (decl));
12690 = build_function_type (void_type_node,
12691 TYPE_ARG_TYPES (TREE_TYPE (decl)));
12693 = build_exception_variant (fntype,
12694 TYPE_RAISES_EXCEPTIONS (fntype));
12697 abstract_virtuals_error (decl, TREE_TYPE (fntype));
12700 /* Create the FUNCTION_DECL for a function definition.
12701 DECLSPECS and DECLARATOR are the parts of the declaration;
12702 they describe the function's name and the type it returns,
12703 but twisted together in a fashion that parallels the syntax of C.
12705 FLAGS is a bitwise or of SF_PRE_PARSED (indicating that the
12706 DECLARATOR is really the DECL for the function we are about to
12707 process and that DECLSPECS should be ignored), SF_INCLASS_INLINE
12708 indicating that the function is an inline defined in-class, and
12709 SF_EXPAND indicating that we should generate RTL for this
12712 This function creates a binding context for the function body
12713 as well as setting up the FUNCTION_DECL in current_function_decl.
12715 Returns 1 on success. If the DECLARATOR is not suitable for a function
12716 (it defines a datum instead), we return 0, which tells
12717 yyparse to report a parse error.
12719 For C++, we must first check whether that datum makes any sense.
12720 For example, "class A local_a(1,2);" means that variable local_a
12721 is an aggregate of type A, which should have a constructor
12722 applied to it with the argument list [1, 2]. */
12725 start_function (declspecs, declarator, attrs, flags)
12726 tree declspecs, declarator, attrs;
12730 tree ctype = NULL_TREE;
12733 extern int have_extern_spec;
12734 extern int used_extern_spec;
12735 int doing_friend = 0;
12736 struct binding_level *bl;
12738 /* Sanity check. */
12739 my_friendly_assert (TREE_CODE (TREE_VALUE (void_list_node)) == VOID_TYPE, 160);
12740 my_friendly_assert (TREE_CHAIN (void_list_node) == NULL_TREE, 161);
12742 /* This should only be done once on the top most decl. */
12743 if (have_extern_spec && !used_extern_spec)
12745 declspecs = decl_tree_cons (NULL_TREE, get_identifier ("extern"), declspecs);
12746 used_extern_spec = 1;
12749 if (flags & SF_PRE_PARSED)
12751 decl1 = declarator;
12753 fntype = TREE_TYPE (decl1);
12754 if (TREE_CODE (fntype) == METHOD_TYPE)
12755 ctype = TYPE_METHOD_BASETYPE (fntype);
12757 /* ANSI C++ June 5 1992 WP 11.4.5. A friend function defined in a
12758 class is in the (lexical) scope of the class in which it is
12760 if (!ctype && DECL_FRIEND_P (decl1))
12762 ctype = DECL_CLASS_CONTEXT (decl1);
12764 /* CTYPE could be null here if we're dealing with a template;
12765 for example, `inline friend float foo()' inside a template
12766 will have no CTYPE set. */
12767 if (ctype && TREE_CODE (ctype) != RECORD_TYPE)
12773 last_function_parms = DECL_ARGUMENTS (decl1);
12774 last_function_parm_tags = NULL_TREE;
12778 decl1 = grokdeclarator (declarator, declspecs, FUNCDEF, 1, NULL_TREE);
12779 /* If the declarator is not suitable for a function definition,
12780 cause a syntax error. */
12781 if (decl1 == NULL_TREE || TREE_CODE (decl1) != FUNCTION_DECL) return 0;
12783 fntype = TREE_TYPE (decl1);
12785 restype = TREE_TYPE (fntype);
12786 if (CLASS_TYPE_P (restype) && !CLASSTYPE_GOT_SEMICOLON (restype))
12788 cp_error ("semicolon missing after declaration of `%#T'", restype);
12789 shadow_tag (build_expr_list (NULL_TREE, restype));
12790 CLASSTYPE_GOT_SEMICOLON (restype) = 1;
12791 if (TREE_CODE (fntype) == FUNCTION_TYPE)
12792 fntype = build_function_type (integer_type_node,
12793 TYPE_ARG_TYPES (fntype));
12795 fntype = build_cplus_method_type (build_type_variant (TYPE_METHOD_BASETYPE (fntype), TREE_READONLY (decl1), TREE_SIDE_EFFECTS (decl1)),
12797 TYPE_ARG_TYPES (fntype));
12798 TREE_TYPE (decl1) = fntype;
12801 if (TREE_CODE (fntype) == METHOD_TYPE)
12802 ctype = TYPE_METHOD_BASETYPE (fntype);
12803 else if (DECL_MAIN_P (decl1))
12805 /* If this doesn't return integer_type, complain. */
12806 if (TREE_TYPE (TREE_TYPE (decl1)) != integer_type_node)
12808 if (pedantic || warn_return_type)
12809 pedwarn ("return type for `main' changed to `int'");
12810 TREE_TYPE (decl1) = fntype = default_function_type;
12815 /* Sometimes we don't notice that a function is a static member, and
12816 build a METHOD_TYPE for it. Fix that up now. */
12817 if (ctype != NULL_TREE && DECL_STATIC_FUNCTION_P (decl1)
12818 && TREE_CODE (TREE_TYPE (decl1)) == METHOD_TYPE)
12820 revert_static_member_fn (&decl1, NULL, NULL);
12821 last_function_parms = TREE_CHAIN (last_function_parms);
12825 /* Warn if function was previously implicitly declared
12826 (but not if we warned then). */
12827 if (! warn_implicit
12828 && IDENTIFIER_IMPLICIT_DECL (DECL_NAME (decl1)) != NULL_TREE)
12829 cp_warning_at ("`%D' implicitly declared before its definition", IDENTIFIER_IMPLICIT_DECL (DECL_NAME (decl1)));
12831 /* Set up current_class_type, and enter the scope of the class, if
12834 push_nested_class (ctype, 1);
12835 else if (DECL_STATIC_FUNCTION_P (decl1))
12836 push_nested_class (DECL_CONTEXT (decl1), 2);
12838 /* Now that we have entered the scope of the class, we must restore
12839 the bindings for any template parameters surrounding DECL1, if it
12840 is an inline member template. (Order is important; consider the
12841 case where a template parameter has the same name as a field of
12842 the class.) It is not until after this point that
12843 PROCESSING_TEMPLATE_DECL is guaranteed to be set up correctly. */
12844 if (flags & SF_INCLASS_INLINE)
12845 maybe_begin_member_template_processing (decl1);
12847 /* Effective C++ rule 15. See also c_expand_return. */
12849 && DECL_NAME (decl1) == ansi_opname[(int) MODIFY_EXPR]
12850 && TREE_CODE (TREE_TYPE (fntype)) == VOID_TYPE)
12851 cp_warning ("`operator=' should return a reference to `*this'");
12853 /* Make the init_value nonzero so pushdecl knows this is not tentative.
12854 error_mark_node is replaced below (in poplevel) with the BLOCK. */
12855 if (!DECL_INITIAL (decl1))
12856 DECL_INITIAL (decl1) = error_mark_node;
12858 #ifdef SET_DEFAULT_DECL_ATTRIBUTES
12859 SET_DEFAULT_DECL_ATTRIBUTES (decl1, attrs);
12862 /* This function exists in static storage.
12863 (This does not mean `static' in the C sense!) */
12864 TREE_STATIC (decl1) = 1;
12866 /* We must call push_template_decl after current_class_type is set
12867 up. (If we are processing inline definitions after exiting a
12868 class scope, current_class_type will be NULL_TREE until set above
12869 by push_nested_class.) */
12870 if (processing_template_decl)
12871 decl1 = push_template_decl (decl1);
12873 /* We are now in the scope of the function being defined. */
12874 current_function_decl = decl1;
12876 /* Save the parm names or decls from this function's declarator
12877 where store_parm_decls will find them. */
12878 current_function_parms = last_function_parms;
12879 current_function_parm_tags = last_function_parm_tags;
12881 /* Make sure the parameter and return types are reasonable. When
12882 you declare a function, these types can be incomplete, but they
12883 must be complete when you define the function. */
12884 if (! processing_template_decl)
12885 check_function_type (decl1);
12887 /* Build the return declaration for the function. */
12888 restype = TREE_TYPE (fntype);
12889 if (!processing_template_decl)
12891 if (!DECL_RESULT (decl1))
12893 DECL_RESULT (decl1)
12894 = build_decl (RESULT_DECL, 0, TYPE_MAIN_VARIANT (restype));
12895 c_apply_type_quals_to_decl (CP_TYPE_QUALS (restype),
12896 DECL_RESULT (decl1));
12900 /* Just use `void'. Nobody will ever look at this anyhow. */
12901 DECL_RESULT (decl1) = build_decl (RESULT_DECL, 0, void_type_node);
12903 /* Initialize RTL machinery. We cannot do this until
12904 CURRENT_FUNCTION_DECL and DECL_RESULT are set up. We do this
12905 even when processing a template; this is how we get
12906 CURRENT_FUNCTION set up, and our per-function variables
12908 bl = current_binding_level;
12909 init_function_start (decl1, input_filename, lineno);
12910 current_binding_level = bl;
12911 expanding_p = (flags & SF_EXPAND) != 0;
12913 /* Even though we're inside a function body, we still don't want to
12914 call expand_expr to calculate the size of a variable-sized array.
12915 We haven't necessarily assigned RTL to all variables yet, so it's
12916 not safe to try to expand expressions involving them. */
12917 immediate_size_expand = 0;
12918 current_function->x_dont_save_pending_sizes_p = 1;
12920 /* If we're building a statement-tree, start the tree now. */
12921 if (processing_template_decl || !expanding_p)
12922 begin_stmt_tree (&DECL_SAVED_TREE (decl1));
12924 /* Let the user know we're compiling this function. */
12925 if (processing_template_decl || !building_stmt_tree ())
12926 announce_function (decl1);
12928 /* Record the decl so that the function name is defined.
12929 If we already have a decl for this name, and it is a FUNCTION_DECL,
12930 use the old decl. */
12931 if (!processing_template_decl && !(flags & SF_PRE_PARSED))
12933 /* A specialization is not used to guide overload resolution. */
12934 if ((flag_guiding_decls
12935 || !DECL_TEMPLATE_SPECIALIZATION (decl1))
12936 && ! DECL_FUNCTION_MEMBER_P (decl1))
12937 decl1 = pushdecl (decl1);
12940 /* We need to set the DECL_CONTEXT. */
12941 if (!DECL_CONTEXT (decl1) && DECL_TEMPLATE_INFO (decl1))
12942 DECL_CONTEXT (decl1) = DECL_CONTEXT (DECL_TI_TEMPLATE (decl1));
12943 /* And make sure we have enough default args. */
12944 check_default_args (decl1);
12946 DECL_MAIN_VARIANT (decl1) = decl1;
12947 fntype = TREE_TYPE (decl1);
12950 /* Reset these in case the call to pushdecl changed them. */
12951 current_function_decl = decl1;
12952 current_function->decl = decl1;
12954 /* Initialize the per-function data. */
12955 if (!DECL_PENDING_INLINE_P (decl1) && DECL_SAVED_FUNCTION_DATA (decl1))
12957 /* If we already parsed this function, and we're just expanding it
12958 now, restore saved state. */
12959 struct binding_level *bl = current_binding_level;
12960 *cp_function_chain = *DECL_SAVED_FUNCTION_DATA (decl1);
12961 current_binding_level = bl;
12963 /* This function is being processed in whole-function mode; we
12964 already did semantic analysis. */
12965 current_function->x_whole_function_mode_p = 1;
12967 /* If we decided that we didn't want to inline this function,
12968 make sure the back-end knows that. */
12969 if (!current_function_cannot_inline)
12970 current_function_cannot_inline = cp_function_chain->cannot_inline;
12972 /* We don't need the saved data anymore. */
12973 free (DECL_SAVED_FUNCTION_DATA (decl1));
12974 DECL_SAVED_FUNCTION_DATA (decl1) = NULL;
12976 else if (ctype && !doing_friend && !DECL_STATIC_FUNCTION_P (decl1))
12978 /* We know that this was set up by `grokclassfn'. We do not
12979 wait until `store_parm_decls', since evil parse errors may
12980 never get us to that point. Here we keep the consistency
12981 between `current_class_type' and `current_class_ptr'. */
12982 tree t = DECL_ARGUMENTS (decl1);
12984 my_friendly_assert (t != NULL_TREE && TREE_CODE (t) == PARM_DECL,
12986 my_friendly_assert (TREE_CODE (TREE_TYPE (t)) == POINTER_TYPE,
12989 cp_function_chain->x_current_class_ref
12990 = build_indirect_ref (t, NULL_PTR);
12991 cp_function_chain->x_current_class_ptr = t;
12993 /* Constructors and destructors need to know whether they're "in
12994 charge" of initializing virtual base classes. */
12995 if (DECL_DESTRUCTOR_P (decl1))
12996 current_in_charge_parm = TREE_CHAIN (t);
12997 else if (DECL_CONSTRUCTOR_P (decl1)
12999 && DECL_ARTIFICIAL (TREE_CHAIN (t))
13000 && (DECL_NAME (TREE_CHAIN (t))
13001 == in_charge_identifier))
13002 current_in_charge_parm = TREE_CHAIN (t);
13005 if (DECL_INTERFACE_KNOWN (decl1))
13007 tree ctx = hack_decl_function_context (decl1);
13009 if (DECL_NOT_REALLY_EXTERN (decl1))
13010 DECL_EXTERNAL (decl1) = 0;
13012 if (ctx != NULL_TREE && DECL_THIS_INLINE (ctx)
13013 && TREE_PUBLIC (ctx))
13014 /* This is a function in a local class in an extern inline
13016 comdat_linkage (decl1);
13018 /* If this function belongs to an interface, it is public.
13019 If it belongs to someone else's interface, it is also external.
13020 This only affects inlines and template instantiations. */
13021 else if (interface_unknown == 0
13022 && (! DECL_TEMPLATE_INSTANTIATION (decl1)
13023 || flag_alt_external_templates))
13025 if (DECL_THIS_INLINE (decl1) || DECL_TEMPLATE_INSTANTIATION (decl1)
13026 || processing_template_decl)
13028 DECL_EXTERNAL (decl1)
13030 || (DECL_THIS_INLINE (decl1) && ! flag_implement_inlines
13031 && !DECL_VINDEX (decl1)));
13033 /* For WIN32 we also want to put these in linkonce sections. */
13034 maybe_make_one_only (decl1);
13037 DECL_EXTERNAL (decl1) = 0;
13038 DECL_NOT_REALLY_EXTERN (decl1) = 0;
13039 DECL_INTERFACE_KNOWN (decl1) = 1;
13041 else if (interface_unknown && interface_only
13042 && (! DECL_TEMPLATE_INSTANTIATION (decl1)
13043 || flag_alt_external_templates))
13045 /* If MULTIPLE_SYMBOL_SPACES is defined and we saw a #pragma
13046 interface, we will have interface_only set but not
13047 interface_known. In that case, we don't want to use the normal
13048 heuristics because someone will supply a #pragma implementation
13049 elsewhere, and deducing it here would produce a conflict. */
13050 comdat_linkage (decl1);
13051 DECL_EXTERNAL (decl1) = 0;
13052 DECL_INTERFACE_KNOWN (decl1) = 1;
13053 DECL_DEFER_OUTPUT (decl1) = 1;
13057 /* This is a definition, not a reference.
13058 So clear DECL_EXTERNAL. */
13059 DECL_EXTERNAL (decl1) = 0;
13061 if ((DECL_THIS_INLINE (decl1) || DECL_TEMPLATE_INSTANTIATION (decl1))
13062 && ! DECL_INTERFACE_KNOWN (decl1)
13063 /* Don't try to defer nested functions for now. */
13064 && ! hack_decl_function_context (decl1))
13065 DECL_DEFER_OUTPUT (decl1) = 1;
13067 DECL_INTERFACE_KNOWN (decl1) = 1;
13070 if (doing_semantic_analysis_p ())
13073 current_binding_level->parm_flag = 1;
13077 cplus_decl_attributes (decl1, NULL_TREE, attrs);
13079 if (!building_stmt_tree ())
13081 GNU_xref_function (decl1, current_function_parms);
13082 make_function_rtl (decl1);
13085 /* Promote the value to int before returning it. */
13086 if (C_PROMOTING_INTEGER_TYPE_P (restype))
13087 restype = type_promotes_to (restype);
13089 /* If this fcn was already referenced via a block-scope `extern' decl
13090 (or an implicit decl), propagate certain information about the usage. */
13091 if (TREE_ADDRESSABLE (DECL_ASSEMBLER_NAME (decl1)))
13092 TREE_ADDRESSABLE (decl1) = 1;
13094 if (DECL_RESULT (decl1) == NULL_TREE)
13096 DECL_RESULT (decl1)
13097 = build_decl (RESULT_DECL, 0, TYPE_MAIN_VARIANT (restype));
13098 TREE_READONLY (DECL_RESULT (decl1)) = CP_TYPE_CONST_P (restype);
13099 TREE_THIS_VOLATILE (DECL_RESULT (decl1)) = CP_TYPE_VOLATILE_P (restype);
13104 if (DESTRUCTOR_NAME_P (DECL_ASSEMBLER_NAME (decl1))
13105 && DECL_LANGUAGE (decl1) == lang_cplusplus)
13107 dtor_label = build_decl (LABEL_DECL, NULL_TREE, NULL_TREE);
13108 DECL_CONTEXT (dtor_label) = current_function_decl;
13110 else if (DECL_CONSTRUCTOR_P (decl1))
13112 ctor_label = build_decl (LABEL_DECL, NULL_TREE, NULL_TREE);
13113 DECL_CONTEXT (ctor_label) = current_function_decl;
13119 /* Called after store_parm_decls for a function-try-block. */
13122 expand_start_early_try_stmts ()
13124 expand_start_try_stmts ();
13127 /* Store the parameter declarations into the current function declaration.
13128 This is called after parsing the parameter declarations, before
13129 digesting the body of the function.
13131 Also install to binding contour return value identifier, if any. */
13134 store_parm_decls ()
13136 register tree fndecl = current_function_decl;
13137 register tree parm;
13138 int parms_have_cleanups = 0;
13139 tree cleanups = NULL_TREE;
13141 /* This is a list of types declared among parms in a prototype. */
13142 tree parmtags = current_function_parm_tags;
13144 /* This is a chain of any other decls that came in among the parm
13145 declarations. If a parm is declared with enum {foo, bar} x;
13146 then CONST_DECLs for foo and bar are put here. */
13147 tree nonparms = NULL_TREE;
13149 /* Create a binding level for the parms. */
13150 if (!building_stmt_tree ())
13151 expand_start_bindings (2);
13153 if (current_function_parms)
13155 /* This case is when the function was defined with an ANSI prototype.
13156 The parms already have decls, so we need not do anything here
13157 except record them as in effect
13158 and complain if any redundant old-style parm decls were written. */
13160 tree specparms = current_function_parms;
13163 if (doing_semantic_analysis_p ())
13165 /* Must clear this because it might contain TYPE_DECLs declared
13167 storedecls (NULL_TREE);
13169 /* If we're doing semantic analysis, then we'll call pushdecl
13170 for each of these. We must do them in reverse order so that
13171 they end in the correct forward order. */
13172 specparms = nreverse (specparms);
13175 for (parm = specparms; parm; parm = next)
13177 next = TREE_CHAIN (parm);
13178 if (TREE_CODE (parm) == PARM_DECL)
13180 tree type = TREE_TYPE (parm);
13182 if (doing_semantic_analysis_p ())
13186 if (DECL_NAME (parm) == NULL_TREE
13187 || TREE_CODE (parm) != VOID_TYPE)
13190 cp_error ("parameter `%D' declared void", parm);
13192 cleanup = maybe_build_cleanup (parm);
13195 cleanups = tree_cons (parm, cleanup, cleanups);
13197 else if (type != error_mark_node
13198 && TYPE_NEEDS_DESTRUCTOR (type))
13199 parms_have_cleanups = 1;
13203 /* If we find an enum constant or a type tag,
13204 put it aside for the moment. */
13205 TREE_CHAIN (parm) = NULL_TREE;
13206 nonparms = chainon (nonparms, parm);
13210 if (doing_semantic_analysis_p ())
13212 /* Get the decls in their original chain order
13213 and record in the function. This is all and only the
13214 PARM_DECLs that were pushed into scope by the loop above. */
13215 DECL_ARGUMENTS (fndecl) = getdecls ();
13216 storetags (chainon (parmtags, gettags ()));
13220 DECL_ARGUMENTS (fndecl) = NULL_TREE;
13222 /* Now store the final chain of decls for the arguments
13223 as the decl-chain of the current lexical scope.
13224 Put the enumerators in as well, at the front so that
13225 DECL_ARGUMENTS is not modified. */
13226 if (doing_semantic_analysis_p ())
13227 storedecls (chainon (nonparms, DECL_ARGUMENTS (fndecl)));
13229 /* Initialize the RTL code for the function. */
13230 DECL_SAVED_INSNS (fndecl) = 0;
13231 if (! building_stmt_tree ())
13232 expand_function_start (fndecl, parms_have_cleanups);
13234 current_function_parms_stored = 1;
13236 /* If this function is `main', emit a call to `__main'
13237 to run global initializers, etc. */
13238 if (DECL_MAIN_P (fndecl) && !building_stmt_tree ())
13239 expand_main_function ();
13241 /* Now that we have initialized the parms, we can start their
13242 cleanups. We cannot do this before, since expand_decl_cleanup
13243 should not be called before the parm can be used. */
13246 finish_decl_cleanup (TREE_PURPOSE (cleanups),
13247 TREE_VALUE (cleanups));
13248 cleanups = TREE_CHAIN (cleanups);
13251 /* Create a binding contour which can be used to catch
13252 cleanup-generated temporaries. Also, if the return value needs or
13253 has initialization, deal with that now. */
13254 if (parms_have_cleanups)
13257 if (!building_stmt_tree ())
13258 expand_start_bindings (2);
13261 /* Do the starting of the exception specifications, if we have any. */
13262 if (flag_exceptions && !processing_template_decl
13263 && building_stmt_tree ()
13264 && TYPE_RAISES_EXCEPTIONS (TREE_TYPE (current_function_decl)))
13265 current_eh_spec_try_block = expand_start_eh_spec ();
13268 /* Bind a name and initialization to the return value of
13269 the current function. */
13272 store_return_init (decl)
13275 /* If this named return value comes in a register, put it in a
13276 pseudo-register. */
13277 if (DECL_REGISTER (decl))
13279 original_result_rtx = DECL_RTL (decl);
13280 DECL_RTL (decl) = gen_reg_rtx (DECL_MODE (decl));
13285 /* We have finished doing semantic analysis on DECL, but have not yet
13286 generated RTL for its body. Save away our current state, so that
13287 when we want to generate RTL later we know what to do. */
13290 save_function_data (decl)
13293 struct language_function *f;
13295 /* Save the language-specific per-function data so that we can
13296 get it back when we really expand this function. */
13297 my_friendly_assert (!DECL_PENDING_INLINE_P (decl),
13301 f = ((struct language_function *)
13302 xmalloc (sizeof (struct language_function)));
13303 bcopy ((char *) cp_function_chain, (char *) f,
13304 sizeof (struct language_function));
13305 DECL_SAVED_FUNCTION_DATA (decl) = f;
13307 /* Clear out the bits we don't need. */
13308 f->x_base_init_list = NULL_TREE;
13309 f->x_member_init_list = NULL_TREE;
13310 f->x_stmt_tree.x_last_stmt = NULL_TREE;
13311 f->x_stmt_tree.x_last_expr_type = NULL_TREE;
13312 f->x_result_rtx = NULL_RTX;
13313 f->x_named_label_uses = NULL;
13314 f->bindings = NULL;
13316 /* When we get back here again, we will be expanding. */
13317 f->x_expanding_p = 1;
13319 /* If we've already decided that we cannot inline this function, we
13320 must remember that fact when we actually go to expand the
13322 f->cannot_inline = current_function_cannot_inline;
13325 /* At the end of every constructor we generate to code to return
13326 `this'. Do that now. */
13329 finish_constructor_body ()
13331 /* Any return from a constructor will end up here. */
13332 add_tree (build_min_nt (LABEL_STMT, ctor_label));
13334 /* Clear CTOR_LABEL so that finish_return_stmt knows to really
13335 generate the return, rather than a goto to CTOR_LABEL. */
13336 ctor_label = NULL_TREE;
13337 /* In check_return_expr we translate an empty return from a
13338 constructor to a return of `this'. */
13339 finish_return_stmt (NULL_TREE);
13340 /* Mark the end of the constructor. */
13341 add_tree (build_min_nt (CTOR_STMT));
13344 /* At the end of every destructor we generate code to restore virtual
13345 function tables to the values desired by base classes and to call
13346 to base class destructors. Do that now. */
13349 finish_destructor_body ()
13351 tree compound_stmt;
13356 /* Create a block to contain all the extra code. */
13357 compound_stmt = begin_compound_stmt (/*has_no_scope=*/0);
13359 /* Any return from a destructor will end up here. */
13360 add_tree (build_min_nt (LABEL_STMT, dtor_label));
13362 /* Generate the code to call destructor on base class. If this
13363 destructor belongs to a class with virtual functions, then set
13364 the virtual function table pointer to represent the type of our
13367 /* This side-effect makes call to `build_delete' generate the code
13368 we have to have at the end of this destructor. `build_delete'
13369 will set the flag again. */
13370 TYPE_HAS_DESTRUCTOR (current_class_type) = 0;
13372 /* These are two cases where we cannot delegate deletion. */
13373 if (TYPE_USES_VIRTUAL_BASECLASSES (current_class_type)
13374 || TYPE_GETS_REG_DELETE (current_class_type))
13375 in_charge = integer_zero_node;
13377 in_charge = current_in_charge_parm;
13379 exprstmt = build_delete (current_class_type,
13382 LOOKUP_NONVIRTUAL|LOOKUP_DESTRUCTOR|LOOKUP_NORMAL,
13385 if (exprstmt != error_mark_node
13386 && (TREE_CODE (exprstmt) != NOP_EXPR
13387 || TREE_OPERAND (exprstmt, 0) != integer_zero_node
13388 || TYPE_USES_VIRTUAL_BASECLASSES (current_class_type)))
13390 if (exprstmt != void_zero_node)
13391 /* Don't call `expand_expr_stmt' if we're not going to do
13392 anything, since -Wall will give a diagnostic. */
13393 finish_expr_stmt (exprstmt);
13395 /* Run destructors for all virtual baseclasses. */
13396 if (TYPE_USES_VIRTUAL_BASECLASSES (current_class_type))
13398 tree vbases = nreverse (copy_list (CLASSTYPE_VBASECLASSES (current_class_type)));
13399 tree if_stmt = begin_if_stmt ();
13400 finish_if_stmt_cond (build (BIT_AND_EXPR, integer_type_node,
13401 current_in_charge_parm,
13407 if (TYPE_NEEDS_DESTRUCTOR (BINFO_TYPE (vbases)))
13409 tree vb = get_vbase
13410 (BINFO_TYPE (vbases),
13411 TYPE_BINFO (current_class_type));
13413 (build_scoped_method_call
13414 (current_class_ref, vb, dtor_identifier,
13415 build_expr_list (NULL_TREE, integer_zero_node)));
13417 vbases = TREE_CHAIN (vbases);
13420 finish_then_clause (if_stmt);
13425 virtual_size = c_sizeof (current_class_type);
13427 /* At the end, call delete if that's what's requested. */
13429 /* FDIS sez: At the point of definition of a virtual destructor
13430 (including an implicit definition), non-placement operator delete
13431 shall be looked up in the scope of the destructor's class and if
13432 found shall be accessible and unambiguous.
13434 This is somewhat unclear, but I take it to mean that if the class
13435 only defines placement deletes we don't do anything here. So we
13436 pass LOOKUP_SPECULATIVELY; delete_sanity will complain for us if
13437 they ever try to delete one of these. */
13438 if (TYPE_GETS_REG_DELETE (current_class_type)
13439 || TYPE_USES_VIRTUAL_BASECLASSES (current_class_type))
13443 exprstmt = build_op_delete_call
13444 (DELETE_EXPR, current_class_ptr, virtual_size,
13445 LOOKUP_NORMAL | LOOKUP_SPECULATIVELY, NULL_TREE);
13447 if_stmt = begin_if_stmt ();
13448 finish_if_stmt_cond (build (BIT_AND_EXPR, integer_type_node,
13449 current_in_charge_parm,
13452 finish_expr_stmt (exprstmt);
13453 finish_then_clause (if_stmt);
13457 /* Close the block we started above. */
13458 finish_compound_stmt (/*has_no_scope=*/0, compound_stmt);
13461 /* Finish up a function declaration and compile that function
13462 all the way to assembler language output. The free the storage
13463 for the function definition.
13465 This is called after parsing the body of the function definition.
13466 LINENO is the current line number.
13468 FLAGS is a bitwise or of the following values:
13470 An extra call to poplevel (and expand_end_bindings) must be
13471 made to take care of the binding contour for the base
13472 initializers. This is only relevant for constructors.
13474 We just finished processing the body of an in-class inline
13475 function definition. (This processing will have taken place
13476 after the class definition is complete.) */
13479 finish_function (lineno, flags)
13483 register tree fndecl = current_function_decl;
13484 tree fntype, ctype = NULL_TREE;
13485 /* Label to use if this function is supposed to return a value. */
13486 tree no_return_label = NULL_TREE;
13487 int call_poplevel = (flags & 1) != 0;
13488 int inclass_inline = (flags & 2) != 0;
13492 /* When we get some parse errors, we can end up without a
13493 current_function_decl, so cope. */
13494 if (fndecl == NULL_TREE)
13495 return error_mark_node;
13497 nested = function_depth > 1;
13498 fntype = TREE_TYPE (fndecl);
13500 /* TREE_READONLY (fndecl) = 1;
13501 This caused &foo to be of type ptr-to-const-function
13502 which then got a warning when stored in a ptr-to-function variable. */
13504 /* This happens on strange parse errors. */
13505 if (! current_function_parms_stored)
13508 store_parm_decls ();
13511 if (building_stmt_tree ())
13513 if (DECL_CONSTRUCTOR_P (fndecl))
13515 finish_constructor_body ();
13519 else if (DECL_DESTRUCTOR_P (fndecl) && !processing_template_decl)
13520 finish_destructor_body ();
13521 else if (DECL_MAIN_P (fndecl))
13523 /* Make it so that `main' always returns 0 by default. */
13525 finish_return_stmt (integer_one_node);
13527 finish_return_stmt (integer_zero_node);
13531 /* Finish dealing with exception specifiers. */
13532 if (flag_exceptions && !processing_template_decl
13533 && TYPE_RAISES_EXCEPTIONS (TREE_TYPE (current_function_decl)))
13534 expand_end_eh_spec (TYPE_RAISES_EXCEPTIONS
13535 (TREE_TYPE (current_function_decl)),
13536 current_eh_spec_try_block);
13541 if (write_symbols != NO_DEBUG /*&& TREE_CODE (fntype) != METHOD_TYPE*/)
13543 /* Keep this code around in case we later want to control debug info
13544 based on whether a type is "used". (jason 1999-11-11) */
13546 tree ttype = target_type (fntype);
13549 if (IS_AGGR_TYPE (ttype))
13550 /* Let debugger know it should output info for this type. */
13551 note_debug_info_needed (ttype);
13553 for (parmdecl = DECL_ARGUMENTS (fndecl); parmdecl; parmdecl = TREE_CHAIN (parmdecl))
13555 ttype = target_type (TREE_TYPE (parmdecl));
13556 if (IS_AGGR_TYPE (ttype))
13557 /* Let debugger know it should output info for this type. */
13558 note_debug_info_needed (ttype);
13563 /* Clean house because we will need to reorder insns here. */
13564 do_pending_stack_adjust ();
13568 else if (DECL_CONSTRUCTOR_P (fndecl))
13573 else if (return_label != NULL_RTX
13574 && flag_this_is_variable <= 0
13575 && current_function_return_value == NULL_TREE
13576 && ! DECL_NAME (DECL_RESULT (current_function_decl)))
13577 no_return_label = build_decl (LABEL_DECL, NULL_TREE, NULL_TREE);
13579 if (flag_exceptions)
13580 expand_exception_blocks ();
13582 /* If this function is supposed to return a value, ensure that
13583 we do not fall into the cleanups by mistake. The end of our
13584 function will look like this:
13586 user code (may have return stmt somewhere)
13587 goto no_return_label
13592 NOTE_INSN_FUNCTION_END
13596 If the user omits a return stmt in the USER CODE section, we
13597 will have a control path which reaches NOTE_INSN_FUNCTION_END.
13598 Otherwise, we won't. */
13599 if (no_return_label)
13601 DECL_CONTEXT (no_return_label) = fndecl;
13602 DECL_INITIAL (no_return_label) = error_mark_node;
13603 DECL_SOURCE_FILE (no_return_label) = input_filename;
13604 DECL_SOURCE_LINE (no_return_label) = lineno;
13605 expand_goto (no_return_label);
13610 /* Remove the binding contour which is used
13611 to catch cleanup-generated temporaries. */
13612 expand_end_bindings (0, 0, 0);
13613 poplevel (0, 0, 0);
13615 /* Emit label at beginning of cleanup code for parameters. */
13616 emit_label (cleanup_label);
13619 /* Get return value into register if that's where it's supposed
13621 if (original_result_rtx)
13622 fixup_result_decl (DECL_RESULT (fndecl), original_result_rtx);
13624 /* Finish building code that will trigger warnings if users forget
13625 to make their functions return values. */
13626 if (no_return_label || cleanup_label)
13627 emit_jump (return_label);
13628 if (no_return_label)
13630 /* We don't need to call `expand_*_return' here because we
13631 don't need any cleanups here--this path of code is only
13632 for error checking purposes. */
13633 expand_label (no_return_label);
13636 /* We hard-wired immediate_size_expand to zero in
13637 start_function. Expand_function_end will decrement this
13638 variable. So, we set the variable to one here, so that after
13639 the decrement it will remain zero. */
13640 immediate_size_expand = 1;
13642 /* Generate rtl for function exit. */
13643 expand_function_end (input_filename, lineno, 1);
13646 /* We have to save this value here in case
13647 maybe_end_member_template_processing decides to pop all the
13648 template parameters. */
13649 expand_p = !building_stmt_tree ();
13651 /* If we're saving up tree structure, tie off the function now. */
13653 finish_stmt_tree (&DECL_SAVED_TREE (fndecl));
13655 /* This must come after expand_function_end because cleanups might
13656 have declarations (from inline functions) that need to go into
13657 this function's blocks. */
13658 if (doing_semantic_analysis_p ())
13660 if (current_binding_level->parm_flag != 1)
13661 my_friendly_abort (122);
13662 poplevel (1, 0, 1);
13665 /* Remember that we were in class scope. */
13666 if (current_class_name)
13667 ctype = current_class_type;
13669 /* Must mark the RESULT_DECL as being in this function. */
13670 DECL_CONTEXT (DECL_RESULT (fndecl)) = fndecl;
13672 /* Set the BLOCK_SUPERCONTEXT of the outermost function scope to point
13673 to the FUNCTION_DECL node itself. */
13674 BLOCK_SUPERCONTEXT (DECL_INITIAL (fndecl)) = fndecl;
13676 /* Save away current state, if appropriate. */
13677 if (!expanding_p && !processing_template_decl)
13678 save_function_data (fndecl);
13680 /* If this function calls `setjmp' it cannot be inlined. When
13681 `longjmp' is called it is not guaranteed to restore the value of
13682 local variables that have been modified since the call to
13683 `setjmp'. So, if were to inline this function into some caller
13684 `c', then when we `longjmp', we might not restore all variables
13685 in `c'. (It might seem, at first blush, that there's no way for
13686 this function to modify local variables in `c', but their
13687 addresses may have been stored somewhere accessible to this
13689 if (!expanding_p && !processing_template_decl && calls_setjmp_p (fndecl))
13690 DECL_UNINLINABLE (fndecl) = 1;
13696 int saved_flag_keep_inline_functions =
13697 flag_keep_inline_functions;
13699 /* So we can tell if jump_optimize sets it to 1. */
13702 if (DECL_CONTEXT (fndecl) != NULL_TREE
13703 && hack_decl_function_context (fndecl))
13704 /* Trick rest_of_compilation into not deferring output of this
13705 function, even if it is inline, since the rtl_obstack for
13706 this function is the function_obstack of the enclosing
13707 function and will be deallocated when the enclosing
13708 function is gone. See save_tree_status. */
13709 flag_keep_inline_functions = 1;
13711 /* Before we call rest_of_compilation (which will pop the
13712 CURRENT_FUNCTION), we must save these values. */
13713 returns_null = current_function_returns_null;
13714 returns_value = current_function_returns_value;
13716 /* If this is a nested function (like a template instantiation
13717 that we're compiling in the midst of compiling something
13718 else), push a new GC context. That will keep local variables
13719 on the stack from being collected while we're doing the
13720 compilation of this function. */
13721 if (function_depth > 1)
13722 ggc_push_context ();
13724 /* Run the optimizers and output the assembler code for this
13726 if (DECL_ARTIFICIAL (fndecl))
13728 /* Do we really *want* to inline this synthesized method? */
13730 int save_fif = flag_inline_functions;
13731 flag_inline_functions = 1;
13733 /* Turn off DECL_INLINE for the moment so function_cannot_inline_p
13734 will check our size. */
13735 DECL_INLINE (fndecl) = 0;
13737 rest_of_compilation (fndecl);
13738 flag_inline_functions = save_fif;
13741 rest_of_compilation (fndecl);
13743 /* Undo the call to ggc_push_context above. */
13744 if (function_depth > 1)
13745 ggc_pop_context ();
13747 flag_keep_inline_functions = saved_flag_keep_inline_functions;
13749 if (DECL_SAVED_INSNS (fndecl) && ! TREE_ASM_WRITTEN (fndecl))
13751 /* Set DECL_EXTERNAL so that assemble_external will be called as
13752 necessary. We'll clear it again in finish_file. */
13753 if (! DECL_EXTERNAL (fndecl))
13754 DECL_NOT_REALLY_EXTERN (fndecl) = 1;
13755 DECL_EXTERNAL (fndecl) = 1;
13756 mark_inline_for_output (fndecl);
13760 /* Keep this code around in case we later want to control debug info
13761 based on whether a type is "used". (jason 1999-11-11) */
13763 if (ctype && TREE_ASM_WRITTEN (fndecl))
13764 note_debug_info_needed (ctype);
13767 returns_null |= can_reach_end;
13769 /* Since we don't normally go through c_expand_return for constructors,
13770 this normally gets the wrong value.
13771 Also, named return values have their return codes emitted after
13772 NOTE_INSN_FUNCTION_END, confusing jump.c. */
13773 if (DECL_CONSTRUCTOR_P (fndecl)
13774 || DECL_NAME (DECL_RESULT (fndecl)) != NULL_TREE)
13777 if (TREE_THIS_VOLATILE (fndecl) && returns_null)
13778 cp_warning ("`noreturn' function `%D' does return", fndecl);
13779 else if ((warn_return_type || pedantic)
13781 && TREE_CODE (TREE_TYPE (fntype)) != VOID_TYPE)
13783 /* If this function returns non-void and control can drop through,
13785 cp_warning ("control reaches end of non-void function `%D'", fndecl);
13787 /* With just -W, complain only if function returns both with
13788 and without a value. */
13789 else if (extra_warnings && returns_value && returns_null)
13790 warning ("this function may return with or without a value");
13794 /* Clear out memory we no longer need. */
13795 free_after_parsing (current_function);
13796 /* Since we never call rest_of_compilation, we never clear
13797 CURRENT_FUNCTION. Do so explicitly. */
13798 free_after_compilation (current_function);
13799 current_function = NULL;
13802 /* If this is a in-class inline definition, we may have to pop the
13803 bindings for the template parameters that we added in
13804 maybe_begin_member_template_processing when start_function was
13806 if (inclass_inline)
13807 maybe_end_member_template_processing ();
13809 /* Leave the scope of the class. */
13811 pop_nested_class ();
13815 if (!DECL_SAVED_INSNS (fndecl) && !DECL_SAVED_FUNCTION_DATA (fndecl)
13816 && !(flag_inline_trees && DECL_INLINE (fndecl)))
13820 /* Stop pointing to the local nodes about to be freed. */
13821 /* But DECL_INITIAL must remain nonzero so we know this
13822 was an actual function definition. */
13823 DECL_INITIAL (fndecl) = error_mark_node;
13824 for (t = DECL_ARGUMENTS (fndecl); t; t = TREE_CHAIN (t))
13825 DECL_RTL (t) = DECL_INCOMING_RTL (t) = NULL_RTX;
13828 if (DECL_STATIC_CONSTRUCTOR (fndecl))
13829 static_ctors = tree_cons (NULL_TREE, fndecl, static_ctors);
13830 if (DECL_STATIC_DESTRUCTOR (fndecl))
13831 static_dtors = tree_cons (NULL_TREE, fndecl, static_dtors);
13836 /* Let the error reporting routines know that we're outside a
13837 function. For a nested function, this value is used in
13838 pop_cp_function_context and then reset via pop_function_context. */
13839 current_function_decl = NULL_TREE;
13840 /* We don't really care about obstacks, but the middle-end
13841 sometimes cares on what obstck things are located. */
13842 permanent_allocation (1);
13848 /* Create the FUNCTION_DECL for a function definition.
13849 DECLSPECS and DECLARATOR are the parts of the declaration;
13850 they describe the return type and the name of the function,
13851 but twisted together in a fashion that parallels the syntax of C.
13853 This function creates a binding context for the function body
13854 as well as setting up the FUNCTION_DECL in current_function_decl.
13856 Returns a FUNCTION_DECL on success.
13858 If the DECLARATOR is not suitable for a function (it defines a datum
13859 instead), we return 0, which tells yyparse to report a parse error.
13861 May return void_type_node indicating that this method is actually
13862 a friend. See grokfield for more details.
13864 Came here with a `.pushlevel' .
13866 DO NOT MAKE ANY CHANGES TO THIS CODE WITHOUT MAKING CORRESPONDING
13867 CHANGES TO CODE IN `grokfield'. */
13870 start_method (declspecs, declarator, attrlist)
13871 tree declarator, declspecs, attrlist;
13873 tree fndecl = grokdeclarator (declarator, declspecs, MEMFUNCDEF, 0,
13876 /* Something too ugly to handle. */
13877 if (fndecl == NULL_TREE)
13880 /* Pass friends other than inline friend functions back. */
13881 if (fndecl == void_type_node)
13884 if (TREE_CODE (fndecl) != FUNCTION_DECL)
13885 /* Not a function, tell parser to report parse error. */
13888 if (DECL_IN_AGGR_P (fndecl))
13890 if (IDENTIFIER_ERROR_LOCUS (DECL_ASSEMBLER_NAME (fndecl)) != current_class_type)
13892 if (DECL_CONTEXT (fndecl)
13893 && TREE_CODE( DECL_CONTEXT (fndecl)) != NAMESPACE_DECL)
13894 cp_error ("`%D' is already defined in class %s", fndecl,
13895 TYPE_NAME_STRING (DECL_CONTEXT (fndecl)));
13897 return void_type_node;
13900 check_template_shadow (fndecl);
13902 DECL_THIS_INLINE (fndecl) = 1;
13904 if (flag_default_inline)
13905 DECL_INLINE (fndecl) = 1;
13907 /* We process method specializations in finish_struct_1. */
13908 if (processing_template_decl && !DECL_TEMPLATE_SPECIALIZATION (fndecl))
13909 fndecl = push_template_decl (fndecl);
13911 /* We read in the parameters on the maybepermanent_obstack,
13912 but we won't be getting back to them until after we
13913 may have clobbered them. So the call to preserve_data
13914 will keep them safe. */
13917 if (! DECL_FRIEND_P (fndecl))
13919 if (TREE_CHAIN (fndecl))
13921 fndecl = copy_node (fndecl);
13922 TREE_CHAIN (fndecl) = NULL_TREE;
13925 if (DECL_CONSTRUCTOR_P (fndecl))
13927 if (! grok_ctor_properties (current_class_type, fndecl))
13928 return void_type_node;
13930 else if (IDENTIFIER_OPNAME_P (DECL_NAME (fndecl)))
13931 grok_op_properties (fndecl, DECL_VIRTUAL_P (fndecl), 0);
13934 cp_finish_decl (fndecl, NULL_TREE, NULL_TREE, 0);
13936 /* Make a place for the parms */
13938 current_binding_level->parm_flag = 1;
13940 DECL_IN_AGGR_P (fndecl) = 1;
13944 /* Go through the motions of finishing a function definition.
13945 We don't compile this method until after the whole class has
13948 FINISH_METHOD must return something that looks as though it
13949 came from GROKFIELD (since we are defining a method, after all).
13951 This is called after parsing the body of the function definition.
13952 STMTS is the chain of statements that makes up the function body.
13954 DECL is the ..._DECL that `start_method' provided. */
13957 finish_method (decl)
13960 register tree fndecl = decl;
13963 register tree link;
13965 if (decl == void_type_node)
13968 old_initial = DECL_INITIAL (fndecl);
13970 /* Undo the level for the parms (from start_method).
13971 This is like poplevel, but it causes nothing to be
13972 saved. Saving information here confuses symbol-table
13973 output routines. Besides, this information will
13974 be correctly output when this method is actually
13977 /* Clear out the meanings of the local variables of this level;
13978 also record in each decl which block it belongs to. */
13980 for (link = current_binding_level->names; link; link = TREE_CHAIN (link))
13982 if (DECL_NAME (link) != NULL_TREE)
13983 pop_binding (DECL_NAME (link), link);
13984 my_friendly_assert (TREE_CODE (link) != FUNCTION_DECL, 163);
13985 DECL_CONTEXT (link) = NULL_TREE;
13988 GNU_xref_end_scope ((HOST_WIDE_INT) current_binding_level,
13989 (HOST_WIDE_INT) current_binding_level->level_chain,
13990 current_binding_level->parm_flag,
13991 current_binding_level->keep);
13993 poplevel (0, 0, 0);
13995 DECL_INITIAL (fndecl) = old_initial;
13997 /* We used to check if the context of FNDECL was different from
13998 current_class_type as another way to get inside here. This didn't work
13999 for String.cc in libg++. */
14000 if (DECL_FRIEND_P (fndecl))
14002 CLASSTYPE_INLINE_FRIENDS (current_class_type)
14003 = tree_cons (NULL_TREE, fndecl, CLASSTYPE_INLINE_FRIENDS (current_class_type));
14004 decl = void_type_node;
14010 /* Called when a new struct TYPE is defined.
14011 If this structure or union completes the type of any previous
14012 variable declaration, lay it out and output its rtl. */
14015 hack_incomplete_structures (type)
14020 if (current_binding_level->incomplete == NULL_TREE)
14023 if (!type) /* Don't do this for class templates. */
14026 for (list = ¤t_binding_level->incomplete; *list; )
14028 tree decl = TREE_VALUE (*list);
14029 if ((decl && TREE_TYPE (decl) == type)
14030 || (TREE_TYPE (decl)
14031 && TREE_CODE (TREE_TYPE (decl)) == ARRAY_TYPE
14032 && TREE_TYPE (TREE_TYPE (decl)) == type))
14034 int toplevel = toplevel_bindings_p ();
14035 if (TREE_CODE (TREE_TYPE (decl)) == ARRAY_TYPE
14036 && TREE_TYPE (TREE_TYPE (decl)) == type)
14037 layout_type (TREE_TYPE (decl));
14038 layout_decl (decl, 0);
14039 rest_of_decl_compilation (decl, NULL_PTR, toplevel, 0);
14043 expand_decl (decl);
14044 cleanup = maybe_build_cleanup (decl);
14045 expand_decl_init (decl);
14046 if (! expand_decl_cleanup (decl, cleanup))
14047 cp_error ("parser lost in parsing declaration of `%D'",
14050 *list = TREE_CHAIN (*list);
14053 list = &TREE_CHAIN (*list);
14057 /* If DECL is of a type which needs a cleanup, build that cleanup here.
14058 See build_delete for information about AUTO_DELETE.
14060 Don't build these on the momentary obstack; they must live
14061 the life of the binding contour. */
14064 maybe_build_cleanup_1 (decl, auto_delete)
14065 tree decl, auto_delete;
14067 tree type = TREE_TYPE (decl);
14068 if (type != error_mark_node && TYPE_NEEDS_DESTRUCTOR (type))
14070 int flags = LOOKUP_NORMAL|LOOKUP_DESTRUCTOR;
14073 if (TREE_CODE (type) == ARRAY_TYPE)
14077 mark_addressable (decl);
14078 rval = build_unary_op (ADDR_EXPR, decl, 0);
14081 /* Optimize for space over speed here. */
14082 if (! TYPE_USES_VIRTUAL_BASECLASSES (type)
14083 || flag_expensive_optimizations)
14084 flags |= LOOKUP_NONVIRTUAL;
14086 rval = build_delete (TREE_TYPE (rval), rval, auto_delete, flags, 0);
14088 if (TYPE_USES_VIRTUAL_BASECLASSES (type)
14089 && ! TYPE_HAS_DESTRUCTOR (type))
14090 rval = build_compound_expr (tree_cons (NULL_TREE, rval,
14091 build_expr_list (NULL_TREE, build_vbase_delete (type, decl))));
14098 /* If DECL is of a type which needs a cleanup, build that cleanup
14099 here. The cleanup does free the storage with a call to delete. */
14102 maybe_build_cleanup_and_delete (decl)
14105 return maybe_build_cleanup_1 (decl, integer_three_node);
14108 /* If DECL is of a type which needs a cleanup, build that cleanup
14109 here. The cleanup does not free the storage with a call a delete. */
14112 maybe_build_cleanup (decl)
14115 return maybe_build_cleanup_1 (decl, integer_two_node);
14118 /* Expand a C++ expression at the statement level.
14119 This is needed to ferret out nodes which have UNKNOWN_TYPE.
14120 The C++ type checker should get all of these out when
14121 expressions are combined with other, type-providing, expressions,
14122 leaving only orphan expressions, such as:
14124 &class::bar; / / takes its address, but does nothing with it. */
14127 cplus_expand_expr_stmt (exp)
14130 if (stmts_are_full_exprs_p)
14131 exp = convert_to_void (exp, "statement");
14134 /* We should do this eventually, but right now this causes regex.o from
14135 libg++ to miscompile, and tString to core dump. */
14136 exp = build1 (CLEANUP_POINT_EXPR, TREE_TYPE (exp), exp);
14139 /* If we don't do this, we end up down inside expand_expr
14140 trying to do TYPE_MODE on the ERROR_MARK, and really
14141 go outside the bounds of the type. */
14142 if (exp != error_mark_node)
14143 expand_expr_stmt (exp);
14146 /* When a stmt has been parsed, this function is called. */
14151 /* Always assume this statement was not an expression statement. If
14152 it actually was an expression statement, its our callers
14153 responsibility to fix this up. */
14154 last_expr_type = NULL_TREE;
14157 /* Change a static member function definition into a FUNCTION_TYPE, instead
14158 of the METHOD_TYPE that we create when it's originally parsed.
14160 WARNING: DO NOT pass &TREE_TYPE (decl) to FN or &TYPE_ARG_TYPES
14161 (TREE_TYPE (decl)) to ARGTYPES, as doing so will corrupt the types of
14162 other decls. Either pass the addresses of local variables or NULL. */
14165 revert_static_member_fn (decl, fn, argtypes)
14166 tree *decl, *fn, *argtypes;
14169 tree function = fn ? *fn : TREE_TYPE (*decl);
14170 tree args = argtypes ? *argtypes : TYPE_ARG_TYPES (function);
14172 if (CP_TYPE_QUALS (TREE_TYPE (TREE_VALUE (args)))
14173 != TYPE_UNQUALIFIED)
14174 cp_error ("static member function `%#D' declared with type qualifiers",
14177 args = TREE_CHAIN (args);
14178 tmp = build_function_type (TREE_TYPE (function), args);
14179 tmp = build_qualified_type (tmp, CP_TYPE_QUALS (function));
14180 tmp = build_exception_variant (tmp,
14181 TYPE_RAISES_EXCEPTIONS (function));
14182 TREE_TYPE (*decl) = tmp;
14183 if (DECL_ARGUMENTS (*decl))
14184 DECL_ARGUMENTS (*decl) = TREE_CHAIN (DECL_ARGUMENTS (*decl));
14185 DECL_STATIC_FUNCTION_P (*decl) = 1;
14192 /* Initialize the variables used during compilation of a C++
14196 push_cp_function_context (f)
14197 struct function *f;
14199 struct language_function *p
14200 = ((struct language_function *)
14201 xcalloc (1, sizeof (struct language_function)));
14204 /* It takes an explicit call to expand_body to generate RTL for a
14208 /* Whenever we start a new function, we destroy temporaries in the
14210 stmts_are_full_exprs_p = 1;
14213 /* Free the language-specific parts of F, now that we've finished
14214 compiling the function. */
14217 pop_cp_function_context (f)
14218 struct function *f;
14221 free (f->language);
14225 /* Mark P for GC. */
14228 mark_lang_function (p)
14229 struct language_function *p;
14234 ggc_mark_tree (p->x_named_labels);
14235 ggc_mark_tree (p->x_ctor_label);
14236 ggc_mark_tree (p->x_dtor_label);
14237 ggc_mark_tree (p->x_base_init_list);
14238 ggc_mark_tree (p->x_member_init_list);
14239 ggc_mark_tree (p->x_current_class_ptr);
14240 ggc_mark_tree (p->x_current_class_ref);
14241 ggc_mark_tree (p->x_eh_spec_try_block);
14242 ggc_mark_tree (p->x_scope_stmt_stack);
14244 ggc_mark_rtx (p->x_result_rtx);
14246 mark_stmt_tree (&p->x_stmt_tree);
14247 mark_binding_level (&p->bindings);
14250 /* Mark the language-specific data in F for GC. */
14253 mark_cp_function_context (f)
14254 struct function *f;
14256 mark_lang_function (f->language);
14262 return function_depth != 0;
14267 lang_mark_false_label_stack (l)
14268 struct label_node *l;
14270 /* C++ doesn't use false_label_stack. It better be NULL. */
14271 my_friendly_assert (l == NULL, 19990904);
14278 enum tree_code code = TREE_CODE (t);
14279 if (code == IDENTIFIER_NODE)
14281 struct lang_identifier *li = (struct lang_identifier *) t;
14282 struct lang_id2 *li2 = li->x;
14283 ggc_mark_tree (li->namespace_bindings);
14284 ggc_mark_tree (li->bindings);
14285 ggc_mark_tree (li->class_value);
14286 ggc_mark_tree (li->class_template_info);
14290 ggc_mark_tree (li2->label_value);
14291 ggc_mark_tree (li2->implicit_decl);
14292 ggc_mark_tree (li2->error_locus);
14295 else if (code == CPLUS_BINDING)
14297 if (BINDING_HAS_LEVEL_P (t))
14298 mark_binding_level (&BINDING_LEVEL (t));
14300 ggc_mark_tree (BINDING_SCOPE (t));
14301 ggc_mark_tree (BINDING_VALUE (t));
14303 else if (code == OVERLOAD)
14304 ggc_mark_tree (OVL_FUNCTION (t));
14305 else if (code == TEMPLATE_PARM_INDEX)
14306 ggc_mark_tree (TEMPLATE_PARM_DECL (t));
14307 else if (TREE_CODE_CLASS (code) == 'd')
14309 struct lang_decl *ld = DECL_LANG_SPECIFIC (t);
14314 if (!DECL_GLOBAL_CTOR_P (t) && !DECL_GLOBAL_DTOR_P (t))
14315 ggc_mark_tree (ld->decl_flags.u2.access);
14316 ggc_mark_tree (ld->decl_flags.context);
14317 if (TREE_CODE (t) != NAMESPACE_DECL)
14318 ggc_mark_tree (ld->decl_flags.u.template_info);
14320 mark_binding_level (&NAMESPACE_LEVEL (t));
14321 if (CAN_HAVE_FULL_LANG_DECL_P (t))
14323 ggc_mark_tree (ld->main_decl_variant);
14324 ggc_mark_tree (ld->befriending_classes);
14325 ggc_mark_tree (ld->saved_tree);
14326 if (TREE_CODE (t) == TYPE_DECL)
14327 ggc_mark_tree (ld->u.sorted_fields);
14328 else if (TREE_CODE (t) == FUNCTION_DECL
14329 && !DECL_PENDING_INLINE_P (t))
14330 mark_lang_function (DECL_SAVED_FUNCTION_DATA (t));
14334 else if (TREE_CODE_CLASS (code) == 't')
14336 struct lang_type *lt = TYPE_LANG_SPECIFIC (t);
14338 if (lt && !(TREE_CODE (t) == POINTER_TYPE
14339 && TREE_CODE (TREE_TYPE (t)) == METHOD_TYPE))
14342 ggc_mark_tree (lt->vfields);
14343 ggc_mark_tree (lt->vbases);
14344 ggc_mark_tree (lt->tags);
14345 ggc_mark_tree (lt->search_slot);
14346 ggc_mark_tree (lt->size);
14347 ggc_mark_tree (lt->abstract_virtuals);
14348 ggc_mark_tree (lt->friend_classes);
14349 ggc_mark_tree (lt->rtti);
14350 ggc_mark_tree (lt->methods);
14351 ggc_mark_tree (lt->template_info);
14352 ggc_mark_tree (lt->befriending_classes);
14355 /* In the case of pointer-to-member function types, the
14356 TYPE_LANG_SPECIFIC is really just a tree. */
14357 ggc_mark_tree ((tree) lt);