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;
52 extern struct obstack* saveable_obstack;
54 extern int current_class_depth;
56 extern tree static_ctors, static_dtors;
58 extern tree global_namespace;
60 extern int (*valid_lang_attribute) PROTO ((tree, tree, tree, tree));
62 /* Use garbage collection. */
66 #ifndef WCHAR_UNSIGNED
67 #define WCHAR_UNSIGNED 0
70 #ifndef CHAR_TYPE_SIZE
71 #define CHAR_TYPE_SIZE BITS_PER_UNIT
74 #ifndef BOOL_TYPE_SIZE
75 #ifdef SLOW_BYTE_ACCESS
76 #define BOOL_TYPE_SIZE ((SLOW_BYTE_ACCESS) ? (POINTER_SIZE) : (CHAR_TYPE_SIZE))
78 #define BOOL_TYPE_SIZE CHAR_TYPE_SIZE
82 /* We let tm.h override the types used here, to handle trivial differences
83 such as the choice of unsigned int or long unsigned int for size_t.
84 When machines start needing nontrivial differences in the size type,
85 it would be best to do something here to figure out automatically
86 from other information what type to use. */
89 #define SIZE_TYPE "long unsigned int"
93 #define PTRDIFF_TYPE "long int"
97 #define WCHAR_TYPE "int"
100 static tree grokparms PROTO((tree, int));
101 static const char *redeclaration_error_message PROTO((tree, tree));
103 static void push_binding_level PROTO((struct binding_level *, int,
105 static void pop_binding_level PROTO((void));
106 static void suspend_binding_level PROTO((void));
107 static void resume_binding_level PROTO((struct binding_level *));
108 static struct binding_level *make_binding_level PROTO((void));
109 static void declare_namespace_level PROTO((void));
110 static void signal_catch PROTO((int)) ATTRIBUTE_NORETURN;
111 static void storedecls PROTO((tree));
112 static void require_complete_types_for_parms PROTO((tree));
113 static void push_overloaded_decl_1 PROTO((tree));
114 static int ambi_op_p PROTO((tree));
115 static int unary_op_p PROTO((tree));
116 static tree store_bindings PROTO((tree, tree));
117 static tree lookup_tag_reverse PROTO((tree, tree));
118 static tree obscure_complex_init PROTO((tree, tree));
119 static tree maybe_build_cleanup_1 PROTO((tree, tree));
120 static tree lookup_name_real PROTO((tree, int, int, int));
121 static void warn_extern_redeclared_static PROTO((tree, tree));
122 static void grok_reference_init PROTO((tree, tree, tree));
123 static tree grokfndecl PROTO((tree, tree, tree, tree, int,
124 enum overload_flags, tree,
125 tree, int, int, int, int, int, int, tree));
126 static tree grokvardecl PROTO((tree, tree, RID_BIT_TYPE *, int, int, tree));
127 static tree lookup_tag PROTO((enum tree_code, tree,
128 struct binding_level *, int));
129 static void set_identifier_type_value_with_scope
130 PROTO((tree, tree, struct binding_level *));
131 static void record_builtin_type PROTO((enum rid, const char *, tree));
132 static void record_unknown_type PROTO((tree, const char *));
133 static int member_function_or_else PROTO((tree, tree, const char *));
134 static void bad_specifiers PROTO((tree, const char *, int, int, int, int,
136 static void lang_print_error_function PROTO((const char *));
137 static tree maybe_process_template_type_declaration PROTO((tree, int, struct binding_level*));
138 static void check_for_uninitialized_const_var PROTO((tree));
139 static unsigned long typename_hash PROTO((hash_table_key));
140 static boolean typename_compare PROTO((hash_table_key, hash_table_key));
141 static void push_binding PROTO((tree, tree, struct binding_level*));
142 static int add_binding PROTO((tree, tree));
143 static void pop_binding PROTO((tree, tree));
144 static tree local_variable_p PROTO((tree *));
145 static tree find_binding PROTO((tree, tree));
146 static tree select_decl PROTO((tree, int));
147 static int lookup_flags PROTO((int, int));
148 static tree qualify_lookup PROTO((tree, int));
149 static tree record_builtin_java_type PROTO((const char *, int));
150 static const char *tag_name PROTO((enum tag_types code));
151 static void find_class_binding_level PROTO((void));
152 static struct binding_level *innermost_nonclass_level PROTO((void));
153 static void warn_about_implicit_typename_lookup PROTO((tree, tree));
154 static int walk_namespaces_r PROTO((tree, walk_namespaces_fn, void *));
155 static int walk_globals_r PROTO((tree, void *));
156 static void add_decl_to_level PROTO((tree, struct binding_level *));
157 static tree make_label_decl PROTO((tree, int));
158 static void pop_label PROTO((tree));
159 static void pop_labels PROTO((tree));
160 static void maybe_deduce_size_from_array_init PROTO((tree, tree));
161 static void layout_var_decl PROTO((tree));
162 static void maybe_commonize_var PROTO((tree));
163 static tree check_initializer PROTO((tree, tree));
164 static void make_rtl_for_nonlocal_decl PROTO((tree, tree, const char *));
165 static void push_cp_function_context PROTO((struct function *));
166 static void pop_cp_function_context PROTO((struct function *));
167 static void mark_binding_level PROTO((void *));
168 static void mark_cp_function_context PROTO((struct function *));
169 static void mark_saved_scope PROTO((void *));
170 static void mark_lang_function PROTO((struct language_function *));
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));
178 #if defined (DEBUG_CP_BINDING_LEVELS)
179 static void indent PROTO((void));
182 /* Erroneous argument lists can use this *IFF* they do not modify it. */
183 tree error_mark_list;
185 /* The following symbols are subsumed in the cp_global_trees array, and
186 listed here individually for documentation purposes.
189 tree wchar_decl_node;
192 tree vtable_entry_type;
193 tree delta_type_node;
196 tree __baselist_desc_type_node;
197 tree __i_desc_type_node, __m_desc_type_node;
198 tree __t_desc_array_type, __i_desc_array_type, __m_desc_array_type;
200 tree __t_desc_type_node;
202 tree __tp_desc_type_node;
204 tree __access_mode_type_node;
205 tree __bltn_desc_type_node, __user_desc_type_node, __class_desc_type_node;
206 tree __ptr_desc_type_node, __attr_desc_type_node, __func_desc_type_node;
207 tree __ptmf_desc_type_node, __ptmd_desc_type_node;
209 Not needed yet? May be needed one day?
210 tree __bltn_desc_array_type, __user_desc_array_type, __class_desc_array_type;
211 tree __ptr_desc_array_type, __attr_dec_array_type, __func_desc_array_type;
212 tree __ptmf_desc_array_type, __ptmd_desc_array_type;
215 tree class_star_type_node;
216 tree class_type_node, record_type_node, union_type_node, enum_type_node;
217 tree unknown_type_node;
219 Array type `vtable_entry_type[]'
222 tree vtbl_ptr_type_node;
228 A FUNCTION_DECL which can call `abort'. Not necessarily the
229 one that the user will declare, but sufficient to be called
230 by routines that want to abort the program.
234 The FUNCTION_DECL for the default `::operator delete'.
236 tree global_delete_fndecl;
239 tree type_info_type_node, tinfo_fn_id, tinfo_fn_type;
243 tree cp_global_trees[CPTI_MAX];
245 /* Indicates that there is a type value in some namespace, although
246 that is not necessarily in scope at the moment. */
248 static tree global_type_node;
253 /* Expect only namespace names now. */
254 static int only_namespace_names;
256 /* In a destructor, the last insn emitted after the start of the
257 function and the parms. */
259 #define last_dtor_insn cp_function_chain->x_last_dtor_insn
261 /* In a constructor, the last insn emitted after the start of the
262 function and the parms, the exception specification and any
263 function-try-block. The constructor initializers are emitted after
266 #define last_parm_cleanup_insn cp_function_chain->x_last_parm_cleanup_insn
268 /* If original DECL_RESULT of current function was a register,
269 but due to being an addressable named return value, would up
270 on the stack, this variable holds the named return value's
271 original location. */
273 #define original_result_rtx cp_function_chain->x_result_rtx
275 struct named_label_list
277 struct binding_level *binding_level;
280 const char *filename_o_goto;
282 struct named_label_list *next;
285 /* Used only for jumps to as-yet undefined labels, since jumps to
286 defined labels can have their validity checked by stmt.c. */
288 #define named_label_uses cp_function_chain->x_named_label_uses
290 /* A list of objects which have constructors or destructors
291 which reside in the global scope. The decl is stored in
292 the TREE_VALUE slot and the initializer is stored
293 in the TREE_PURPOSE slot. */
294 tree static_aggregates;
298 /* A node for the integer constants 2, and 3. */
300 tree integer_two_node, integer_three_node;
302 /* While defining an enum type, this is 1 plus the last enumerator
305 static tree enum_next_value;
307 /* Nonzero means that there was overflow computing enum_next_value. */
309 static int enum_overflow;
311 /* Parsing a function declarator leaves here a chain of structure
312 and enum types declared in the parmlist. */
314 static tree last_function_parm_tags;
316 /* Similar, for last_function_parm_tags. */
317 tree last_function_parms;
318 static tree current_function_parm_tags;
320 /* A list (chain of TREE_LIST nodes) of all LABEL_DECLs in the function
321 that have names. Here so we can clear out their names' definitions
322 at the end of the function. The TREE_VALUE is a LABEL_DECL; the
323 TREE_PURPOSE is the previous binding of the label. */
325 #define named_labels cp_function_chain->x_named_labels
327 /* The FUNCTION_DECL for the function currently being compiled,
328 or 0 if between functions. */
329 tree current_function_decl;
331 /* Set to 0 at beginning of a function definition, and whenever
332 a label (case or named) is defined. Set to value of expression
333 returned from function when that value can be transformed into
334 a named return value. */
336 tree current_function_return_value;
338 /* Nonzero means give `double' the same size as `float'. */
340 extern int flag_short_double;
342 /* Nonzero means don't recognize any builtin functions. */
344 extern int flag_no_builtin;
346 /* Nonzero means don't recognize the non-ANSI builtin functions.
349 extern int flag_no_nonansi_builtin;
351 /* Nonzero means enable obscure ANSI features and disable GNU extensions
352 that might cause ANSI-compliant code to be miscompiled. */
354 extern int flag_ansi;
356 /* Nonzero if we want to support huge (> 2^(sizeof(short)*8-1) bytes)
358 extern int flag_huge_objects;
360 /* Nonzero if we want to conserve space in the .o files. We do this
361 by putting uninitialized data and runtime initialized data into
362 .common instead of .data at the expense of not flagging multiple
364 extern int flag_conserve_space;
366 /* C and C++ flags are in decl2.c. */
368 /* Flag used when debugging spew.c */
370 extern int spew_debug;
372 /* A expression of value 0 with the same precision as a sizetype
374 tree signed_size_zero_node;
376 /* The name of the anonymous namespace, throughout this translation
378 tree anonymous_namespace_name;
381 /* For each binding contour we allocate a binding_level structure
382 which records the names defined in that contour.
385 1) one for each function definition,
386 where internal declarations of the parameters appear.
387 2) one for each compound statement,
388 to record its declarations.
390 The current meaning of a name can be found by searching the levels
391 from the current one out to the global one.
393 Off to the side, may be the class_binding_level. This exists only
394 to catch class-local declarations. It is otherwise nonexistent.
396 Also there may be binding levels that catch cleanups that must be
397 run when exceptions occur. Thus, to see whether a name is bound in
398 the current scope, it is not enough to look in the
399 CURRENT_BINDING_LEVEL. You should use lookup_name_current_level
402 /* Note that the information in the `names' component of the global contour
403 is duplicated in the IDENTIFIER_GLOBAL_VALUEs of all identifiers. */
407 /* A chain of _DECL nodes for all variables, constants, functions,
408 and typedef types. These are in the reverse of the order
409 supplied. There may be OVERLOADs on this list, too, but they
410 are wrapped in TREE_LISTs; the TREE_VALUE is the OVERLOAD. */
413 /* A list of structure, union and enum definitions, for looking up
415 It is a chain of TREE_LIST nodes, each of whose TREE_PURPOSE is a name,
416 or NULL_TREE; and whose TREE_VALUE is a RECORD_TYPE, UNION_TYPE,
417 or ENUMERAL_TYPE node.
419 C++: the TREE_VALUE nodes can be simple types for
420 component_bindings. */
423 /* A list of USING_DECL nodes. */
426 /* A list of used namespaces. PURPOSE is the namespace,
427 VALUE the common ancestor with this binding_level's namespace. */
428 tree using_directives;
430 /* If this binding level is the binding level for a class, then
431 class_shadowed is a TREE_LIST. The TREE_PURPOSE of each node
432 is the name of an entity bound in the class; the TREE_VALUE is
433 the IDENTIFIER_CLASS_VALUE before we entered the class. Thus,
434 when leaving class scope, we can restore the
435 IDENTIFIER_CLASS_VALUE by walking this list. The TREE_TYPE is
436 the DECL bound by this name in the class. */
439 /* Similar to class_shadowed, but for IDENTIFIER_TYPE_VALUE, and
440 is used for all binding levels. */
443 /* A TREE_LIST. Each TREE_VALUE is the LABEL_DECL for a local
444 label in this scope. The TREE_PURPOSE is the previous value of
445 the IDENTIFIER_LABEL VALUE. */
446 tree shadowed_labels;
448 /* For each level (except not the global one),
449 a chain of BLOCK nodes for all the levels
450 that were entered and exited one level down. */
453 /* The BLOCK node for this level, if one has been preallocated.
454 If 0, the BLOCK is allocated (if needed) when the level is popped. */
457 /* The binding level which this one is contained in (inherits from). */
458 struct binding_level *level_chain;
460 /* List of decls in `names' that have incomplete
461 structure or union types. */
464 /* List of VAR_DECLS saved from a previous for statement.
465 These would be dead in ANSI-conforming code, but might
466 be referenced in ARM-era code. These are stored in a
467 TREE_LIST; the TREE_VALUE is the actual declaration. */
468 tree dead_vars_from_for;
470 /* 1 for the level that holds the parameters of a function.
471 2 for the level that holds a class declaration.
472 3 for levels that hold parameter declarations. */
473 unsigned parm_flag : 4;
475 /* 1 means make a BLOCK for this level regardless of all else.
476 2 for temporary binding contours created by the compiler. */
479 /* Nonzero if this level "doesn't exist" for tags. */
480 unsigned tag_transparent : 1;
482 /* Nonzero if this level can safely have additional
483 cleanup-needing variables added to it. */
484 unsigned more_cleanups_ok : 1;
485 unsigned have_cleanups : 1;
487 /* Nonzero if this level is for storing the decls for template
488 parameters and generic decls; these decls will be discarded and
489 replaced with a TEMPLATE_DECL. */
490 unsigned pseudo_global : 1;
492 /* This is set for a namespace binding level. */
493 unsigned namespace_p : 1;
495 /* True if this level is that of a for-statement where we need to
496 worry about ambiguous (ARM or ANSI) scope rules. */
497 unsigned is_for_scope : 1;
499 /* True if this level corresponds to an EH region, as for a try block. */
500 unsigned eh_region : 1;
502 /* One bit left for this word. */
504 #if defined(DEBUG_CP_BINDING_LEVELS)
505 /* Binding depth at which this level began. */
506 unsigned binding_depth;
507 #endif /* defined(DEBUG_CP_BINDING_LEVELS) */
510 #define NULL_BINDING_LEVEL ((struct binding_level *) NULL)
512 /* The binding level currently in effect. */
514 #define current_binding_level \
516 ? cp_function_chain->bindings \
517 : scope_chain->bindings)
519 /* The binding level of the current class, if any. */
521 #define class_binding_level scope_chain->class_bindings
523 /* A chain of binding_level structures awaiting reuse. */
525 static struct binding_level *free_binding_level;
527 /* The outermost binding level, for names of file scope.
528 This is created when the compiler is started and exists
529 through the entire run. */
531 static struct binding_level *global_binding_level;
533 /* Nonzero means unconditionally make a BLOCK for the next level pushed. */
535 static int keep_next_level_flag;
537 #if defined(DEBUG_CP_BINDING_LEVELS)
538 static int binding_depth = 0;
539 static int is_class_level = 0;
546 for (i = 0; i < binding_depth*2; i++)
549 #endif /* defined(DEBUG_CP_BINDING_LEVELS) */
551 static tree pushdecl_with_scope PROTO((tree, struct binding_level *));
554 push_binding_level (newlevel, tag_transparent, keep)
555 struct binding_level *newlevel;
556 int tag_transparent, keep;
558 /* Add this level to the front of the chain (stack) of levels that
560 bzero ((char*) newlevel, sizeof (struct binding_level));
561 newlevel->level_chain = current_binding_level;
562 current_binding_level = newlevel;
563 newlevel->tag_transparent = tag_transparent;
564 newlevel->more_cleanups_ok = 1;
566 /* We are called before expand_start_bindings, but after
567 expand_eh_region_start for a try block; so we check this now,
568 before the EH block is covered up. */
569 newlevel->eh_region = is_eh_region ();
571 newlevel->keep = keep;
572 #if defined(DEBUG_CP_BINDING_LEVELS)
573 newlevel->binding_depth = binding_depth;
575 fprintf (stderr, "push %s level 0x%08x line %d\n",
576 (is_class_level) ? "class" : "block", newlevel, lineno);
579 #endif /* defined(DEBUG_CP_BINDING_LEVELS) */
582 /* Find the innermost enclosing class scope, and reset
583 CLASS_BINDING_LEVEL appropriately. */
586 find_class_binding_level ()
588 struct binding_level *level = current_binding_level;
590 while (level && level->parm_flag != 2)
591 level = level->level_chain;
592 if (level && level->parm_flag == 2)
593 class_binding_level = level;
595 class_binding_level = 0;
601 if (global_binding_level)
603 /* Cannot pop a level, if there are none left to pop. */
604 if (current_binding_level == global_binding_level)
605 my_friendly_abort (123);
607 /* Pop the current level, and free the structure for reuse. */
608 #if defined(DEBUG_CP_BINDING_LEVELS)
611 fprintf (stderr, "pop %s level 0x%08x line %d\n",
612 (is_class_level) ? "class" : "block",
613 current_binding_level, lineno);
614 if (is_class_level != (current_binding_level == class_binding_level))
617 fprintf (stderr, "XXX is_class_level != (current_binding_level == class_binding_level)\n");
620 #endif /* defined(DEBUG_CP_BINDING_LEVELS) */
622 register struct binding_level *level = current_binding_level;
623 current_binding_level = current_binding_level->level_chain;
624 level->level_chain = free_binding_level;
625 #if 0 /* defined(DEBUG_CP_BINDING_LEVELS) */
626 if (level->binding_depth != binding_depth)
628 #endif /* defined(DEBUG_CP_BINDING_LEVELS) */
629 free_binding_level = level;
630 find_class_binding_level ();
635 suspend_binding_level ()
637 if (class_binding_level)
638 current_binding_level = class_binding_level;
640 if (global_binding_level)
642 /* Cannot suspend a level, if there are none left to suspend. */
643 if (current_binding_level == global_binding_level)
644 my_friendly_abort (123);
646 /* Suspend the current level. */
647 #if defined(DEBUG_CP_BINDING_LEVELS)
650 fprintf (stderr, "suspend %s level 0x%08x line %d\n",
651 (is_class_level) ? "class" : "block",
652 current_binding_level, lineno);
653 if (is_class_level != (current_binding_level == class_binding_level))
656 fprintf (stderr, "XXX is_class_level != (current_binding_level == class_binding_level)\n");
659 #endif /* defined(DEBUG_CP_BINDING_LEVELS) */
660 current_binding_level = current_binding_level->level_chain;
661 find_class_binding_level ();
665 resume_binding_level (b)
666 struct binding_level *b;
668 /* Resuming binding levels is meant only for namespaces,
669 and those cannot nest into classes. */
670 my_friendly_assert(!class_binding_level, 386);
671 /* Also, resuming a non-directly nested namespace is a no-no. */
672 my_friendly_assert(b->level_chain == current_binding_level, 386);
673 current_binding_level = b;
674 #if defined(DEBUG_CP_BINDING_LEVELS)
675 b->binding_depth = binding_depth;
677 fprintf (stderr, "resume %s level 0x%08x line %d\n",
678 (is_class_level) ? "class" : "block", b, lineno);
681 #endif /* defined(DEBUG_CP_BINDING_LEVELS) */
684 /* Create a new `struct binding_level'. */
687 struct binding_level *
688 make_binding_level ()
691 return (struct binding_level *) xmalloc (sizeof (struct binding_level));
694 /* Nonzero if we are currently in the global binding level. */
699 return current_binding_level == global_binding_level;
702 /* Return the innermost binding level that is not for a class scope. */
704 static struct binding_level *
705 innermost_nonclass_level ()
707 struct binding_level *b;
709 b = current_binding_level;
710 while (b->parm_flag == 2)
716 /* Nonzero if we are currently in a toplevel binding level. This
717 means either the global binding level or a namespace in a toplevel
718 binding level. Since there are no non-toplevel namespace levels,
719 this really means any namespace or pseudo-global level. We also
720 include a class whose context is toplevel. */
723 toplevel_bindings_p ()
725 struct binding_level *b = innermost_nonclass_level ();
727 return b->namespace_p || b->pseudo_global;
730 /* Nonzero if this is a namespace scope, or if we are defining a class
731 which is itself at namespace scope, or whose enclosing class is
732 such a class, etc. */
735 namespace_bindings_p ()
737 struct binding_level *b = innermost_nonclass_level ();
739 return b->namespace_p;
742 /* If KEEP is non-zero, make a BLOCK node for the next binding level,
743 unconditionally. Otherwise, use the normal logic to decide whether
744 or not to create a BLOCK. */
747 keep_next_level (keep)
750 keep_next_level_flag = keep;
753 /* Nonzero if the current level needs to have a BLOCK made. */
758 return (current_binding_level->blocks != NULL_TREE
759 || current_binding_level->keep
760 || current_binding_level->names != NULL_TREE
761 || (current_binding_level->tags != NULL_TREE
762 && !current_binding_level->tag_transparent));
766 declare_pseudo_global_level ()
768 current_binding_level->pseudo_global = 1;
772 declare_namespace_level ()
774 current_binding_level->namespace_p = 1;
778 pseudo_global_level_p ()
780 return current_binding_level->pseudo_global;
784 set_class_shadows (shadows)
787 class_binding_level->class_shadowed = shadows;
790 /* Enter a new binding level.
791 If TAG_TRANSPARENT is nonzero, do so only for the name space of variables,
792 not for that of tags. */
795 pushlevel (tag_transparent)
798 struct binding_level *newlevel;
800 if (current_function && !doing_semantic_analysis_p ())
803 /* Reuse or create a struct for this binding level. */
804 #if defined(DEBUG_CP_BINDING_LEVELS)
806 #else /* !defined(DEBUG_CP_BINDING_LEVELS) */
807 if (free_binding_level)
808 #endif /* !defined(DEBUG_CP_BINDING_LEVELS) */
810 newlevel = free_binding_level;
811 free_binding_level = free_binding_level->level_chain;
814 newlevel = make_binding_level ();
816 push_binding_level (newlevel, tag_transparent, keep_next_level_flag);
817 GNU_xref_start_scope ((HOST_WIDE_INT) newlevel);
818 keep_next_level_flag = 0;
822 note_level_for_for ()
824 current_binding_level->is_for_scope = 1;
828 pushlevel_temporary (tag_transparent)
831 pushlevel (tag_transparent);
832 current_binding_level->keep = 2;
835 /* Note we don't call push_momentary() here. Otherwise, it would cause
836 cleanups to be allocated on the momentary obstack, and they will be
837 overwritten by the next statement. */
839 expand_start_bindings (0);
842 /* For a binding between a name and an entity at a block scope,
843 this is the `struct binding_level' for the block. */
844 #define BINDING_LEVEL(NODE) \
845 (((struct tree_binding*)NODE)->scope.level)
847 /* Make DECL the innermost binding for ID. The LEVEL is the binding
848 level at which this declaration is being bound. */
851 push_binding (id, decl, level)
854 struct binding_level* level;
858 binding = make_node (CPLUS_BINDING);
860 /* Now, fill in the binding information. */
861 BINDING_VALUE (binding) = decl;
862 BINDING_TYPE (binding) = NULL_TREE;
863 BINDING_LEVEL (binding) = level;
864 INHERITED_VALUE_BINDING_P (binding) = 0;
865 LOCAL_BINDING_P (binding) = (level != class_binding_level);
866 BINDING_HAS_LEVEL_P (binding) = 1;
868 /* And put it on the front of the list of bindings for ID. */
869 TREE_CHAIN (binding) = IDENTIFIER_BINDING (id);
870 IDENTIFIER_BINDING (id) = binding;
873 /* ID is already bound in the current scope. But, DECL is an
874 additional binding for ID in the same scope. This is the `struct
875 stat' hack whereby a non-typedef class-name or enum-name can be
876 bound at the same level as some other kind of entity. It's the
877 responsibility of the caller to check that inserting this name is
878 legal here. Returns nonzero if the new binding was successful. */
880 add_binding (id, decl)
884 tree binding = IDENTIFIER_BINDING (id);
887 if (TREE_CODE (decl) == TYPE_DECL && DECL_ARTIFICIAL (decl))
888 /* The new name is the type name. */
889 BINDING_TYPE (binding) = decl;
890 else if (!BINDING_VALUE (binding))
891 /* This situation arises when push_class_level_binding moves an
892 inherited type-binding out of the way to make room for a new
894 BINDING_VALUE (binding) = decl;
895 else if (TREE_CODE (BINDING_VALUE (binding)) == TYPE_DECL
896 && DECL_ARTIFICIAL (BINDING_VALUE (binding)))
898 /* The old binding was a type name. It was placed in
899 BINDING_VALUE because it was thought, at the point it was
900 declared, to be the only entity with such a name. Move the
901 type name into the type slot; it is now hidden by the new
903 BINDING_TYPE (binding) = BINDING_VALUE (binding);
904 BINDING_VALUE (binding) = decl;
905 INHERITED_VALUE_BINDING_P (binding) = 0;
907 else if (TREE_CODE (BINDING_VALUE (binding)) == TYPE_DECL
908 && TREE_CODE (decl) == TYPE_DECL
909 && DECL_NAME (decl) == DECL_NAME (BINDING_VALUE (binding))
910 && same_type_p (TREE_TYPE (decl),
911 TREE_TYPE (BINDING_VALUE (binding))))
912 /* We have two typedef-names, both naming the same type to have
913 the same name. This is OK because of:
917 In a given scope, a typedef specifier can be used to redefine
918 the name of any type declared in that scope to refer to the
919 type to which it already refers. */
923 cp_error ("declaration of `%#D'", decl);
924 cp_error_at ("conflicts with previous declaration `%#D'",
925 BINDING_VALUE (binding));
932 /* Add DECL to the list of things declared in B. */
935 add_decl_to_level (decl, b)
937 struct binding_level *b;
939 /* We build up the list in reverse order, and reverse it later if
941 TREE_CHAIN (decl) = b->names;
945 /* Bind DECL to ID in the current_binding_level, assumed to be a local
946 binding level. If PUSH_USING is set in FLAGS, we know that DECL
947 doesn't really belong to this binding level, that it got here
948 through a using-declaration. */
951 push_local_binding (id, decl, flags)
956 struct binding_level *b;
958 /* Skip over any local classes. This makes sense if we call
959 push_local_binding with a friend decl of a local class. */
960 b = current_binding_level;
961 while (b->parm_flag == 2)
964 if (lookup_name_current_level (id))
966 /* Supplement the existing binding. */
967 if (!add_binding (id, decl))
968 /* It didn't work. Something else must be bound at this
969 level. Do not add DECL to the list of things to pop
974 /* Create a new binding. */
975 push_binding (id, decl, b);
977 if (TREE_CODE (decl) == OVERLOAD || (flags & PUSH_USING))
978 /* We must put the OVERLOAD into a TREE_LIST since the
979 TREE_CHAIN of an OVERLOAD is already used. Similarly for
980 decls that got here through a using-declaration. */
981 decl = build_tree_list (NULL_TREE, decl);
983 /* And put DECL on the list of things declared by the current
985 add_decl_to_level (decl, b);
988 /* Bind DECL to ID in the class_binding_level. Returns nonzero if the
989 binding was successful. */
992 push_class_binding (id, decl)
997 tree binding = IDENTIFIER_BINDING (id);
1000 /* Note that we declared this value so that we can issue an error if
1001 this an illegal redeclaration of a name already used for some
1003 note_name_declared_in_class (id, decl);
1005 if (binding && BINDING_LEVEL (binding) == class_binding_level)
1006 /* Supplement the existing binding. */
1007 result = add_binding (id, decl);
1009 /* Create a new binding. */
1010 push_binding (id, decl, class_binding_level);
1012 /* Update the IDENTIFIER_CLASS_VALUE for this ID to be the
1013 class-level declaration. Note that we do not use DECL here
1014 because of the possibility of the `struct stat' hack; if DECL is
1015 a class-name or enum-name we might prefer a field-name, or some
1017 IDENTIFIER_CLASS_VALUE (id) = BINDING_VALUE (IDENTIFIER_BINDING (id));
1019 /* If this is a binding from a base class, mark it as such. */
1020 binding = IDENTIFIER_BINDING (id);
1021 if (BINDING_VALUE (binding) == decl && TREE_CODE (decl) != TREE_LIST)
1023 /* Any implicit typename must be from a base-class. The
1024 context for an implicit typename declaration is always
1025 the derived class in which the lookup was done, so the checks
1026 based on the context of DECL below will not trigger. */
1027 if (IMPLICIT_TYPENAME_TYPE_DECL_P (decl))
1028 INHERITED_VALUE_BINDING_P (binding) = 1;
1031 if (TREE_CODE (decl) == OVERLOAD)
1032 context = DECL_REAL_CONTEXT (OVL_CURRENT (decl));
1035 my_friendly_assert (TREE_CODE_CLASS (TREE_CODE (decl)) == 'd',
1037 context = DECL_REAL_CONTEXT (decl);
1040 if (is_properly_derived_from (current_class_type, context))
1041 INHERITED_VALUE_BINDING_P (binding) = 1;
1043 INHERITED_VALUE_BINDING_P (binding) = 0;
1046 else if (BINDING_VALUE (binding) == decl)
1047 /* We only encounter a TREE_LIST when push_class_decls detects an
1048 ambiguity. Such an ambiguity can be overridden by a definition
1050 INHERITED_VALUE_BINDING_P (binding) = 1;
1055 /* Remove the binding for DECL which should be the innermost binding
1059 pop_binding (id, decl)
1065 if (id == NULL_TREE)
1066 /* It's easiest to write the loops that call this function without
1067 checking whether or not the entities involved have names. We
1068 get here for such an entity. */
1071 /* Get the innermost binding for ID. */
1072 binding = IDENTIFIER_BINDING (id);
1074 /* The name should be bound. */
1075 my_friendly_assert (binding != NULL_TREE, 0);
1077 /* The DECL will be either the ordinary binding or the type
1078 binding for this identifier. Remove that binding. */
1079 if (BINDING_VALUE (binding) == decl)
1080 BINDING_VALUE (binding) = NULL_TREE;
1081 else if (BINDING_TYPE (binding) == decl)
1082 BINDING_TYPE (binding) = NULL_TREE;
1084 my_friendly_abort (0);
1086 if (!BINDING_VALUE (binding) && !BINDING_TYPE (binding))
1087 /* We're completely done with the innermost binding for this
1088 identifier. Unhook it from the list of bindings. */
1089 IDENTIFIER_BINDING (id) = TREE_CHAIN (binding);
1092 /* When a label goes out of scope, check to see if that label was used
1093 in a valid manner, and issue any appropriate warnings or errors. */
1099 tree label = TREE_VALUE (link);
1101 if (!processing_template_decl && doing_semantic_analysis_p ())
1103 if (DECL_INITIAL (label) == NULL_TREE)
1105 cp_error_at ("label `%D' used but not defined", label);
1106 /* Avoid crashing later. */
1107 define_label (input_filename, 1, DECL_NAME (label));
1109 else if (warn_unused && !TREE_USED (label))
1110 cp_warning_at ("label `%D' defined but not used", label);
1113 SET_IDENTIFIER_LABEL_VALUE (DECL_NAME (label), TREE_PURPOSE (link));
1116 /* At the end of a function, all labels declared within the fucntion
1117 go out of scope. BLOCK is the top-level block for the
1126 /* Clear out the definitions of all label names, since their scopes
1128 for (link = named_labels; link; link = TREE_CHAIN (link))
1131 /* Put the labels into the "variables" of the top-level block,
1132 so debugger can see them. */
1133 TREE_CHAIN (TREE_VALUE (link)) = BLOCK_VARS (block);
1134 BLOCK_VARS (block) = TREE_VALUE (link);
1137 named_labels = NULL_TREE;
1140 /* Exit a binding level.
1141 Pop the level off, and restore the state of the identifier-decl mappings
1142 that were in effect when this level was entered.
1144 If KEEP == 1, this level had explicit declarations, so
1145 and create a "block" (a BLOCK node) for the level
1146 to record its declarations and subblocks for symbol table output.
1148 If FUNCTIONBODY is nonzero, this level is the body of a function,
1149 so create a block as if KEEP were set and also clear out all
1152 If REVERSE is nonzero, reverse the order of decls before putting
1153 them into the BLOCK. */
1156 poplevel (keep, reverse, functionbody)
1162 /* The chain of decls was accumulated in reverse order.
1163 Put it into forward order, just for cleanliness. */
1165 int tmp = functionbody;
1166 int real_functionbody;
1169 tree block = NULL_TREE;
1171 int block_previously_created;
1172 int leaving_for_scope;
1174 if (current_function && !doing_semantic_analysis_p ())
1177 my_friendly_assert (current_binding_level->parm_flag != 2,
1180 real_functionbody = (current_binding_level->keep == 2
1181 ? ((functionbody = 0), tmp) : functionbody);
1182 tags = functionbody >= 0 ? current_binding_level->tags : 0;
1183 subblocks = functionbody >= 0 ? current_binding_level->blocks : 0;
1185 my_friendly_assert (!current_binding_level->class_shadowed,
1188 /* We used to use KEEP == 2 to indicate that the new block should go
1189 at the beginning of the list of blocks at this binding level,
1190 rather than the end. This hack is no longer used. */
1191 my_friendly_assert (keep == 0 || keep == 1, 0);
1193 GNU_xref_end_scope ((HOST_WIDE_INT) current_binding_level,
1194 (HOST_WIDE_INT) current_binding_level->level_chain,
1195 current_binding_level->parm_flag,
1196 current_binding_level->keep);
1198 if (current_binding_level->keep == 1)
1201 /* Get the decls in the order they were written.
1202 Usually current_binding_level->names is in reverse order.
1203 But parameter decls were previously put in forward order. */
1206 current_binding_level->names
1207 = decls = nreverse (current_binding_level->names);
1209 decls = current_binding_level->names;
1211 /* Output any nested inline functions within this block
1212 if they weren't already output. */
1214 for (decl = decls; decl; decl = TREE_CHAIN (decl))
1215 if (TREE_CODE (decl) == FUNCTION_DECL
1216 && ! TREE_ASM_WRITTEN (decl)
1217 && DECL_INITIAL (decl) != NULL_TREE
1218 && TREE_ADDRESSABLE (decl)
1219 && decl_function_context (decl) == current_function_decl)
1221 /* If this decl was copied from a file-scope decl
1222 on account of a block-scope extern decl,
1223 propagate TREE_ADDRESSABLE to the file-scope decl. */
1224 if (DECL_ABSTRACT_ORIGIN (decl) != NULL_TREE)
1225 TREE_ADDRESSABLE (DECL_ABSTRACT_ORIGIN (decl)) = 1;
1228 push_function_context ();
1229 output_inline_function (decl);
1230 pop_function_context ();
1234 /* If there were any declarations or structure tags in that level,
1235 or if this level is a function body,
1236 create a BLOCK to record them for the life of this function. */
1239 block_previously_created = (current_binding_level->this_block != NULL_TREE);
1240 if (block_previously_created)
1241 block = current_binding_level->this_block;
1242 else if (keep == 1 || functionbody)
1243 block = make_node (BLOCK);
1244 if (block != NULL_TREE)
1246 if (block_previously_created)
1248 if (decls || tags || subblocks)
1250 if (BLOCK_VARS (block) || BLOCK_TYPE_TAGS (block))
1251 warning ("internal compiler error: debugging info corrupted");
1253 BLOCK_VARS (block) = decls;
1254 BLOCK_TYPE_TAGS (block) = tags;
1256 /* We can have previous subblocks and new subblocks when
1257 doing fixup_gotos with complex cleanups. We chain the new
1258 subblocks onto the end of any pre-existing subblocks. */
1259 BLOCK_SUBBLOCKS (block) = chainon (BLOCK_SUBBLOCKS (block),
1262 /* If we created the block earlier on, and we are just
1263 diddling it now, then it already should have a proper
1264 BLOCK_END_NOTE value associated with it. */
1268 BLOCK_VARS (block) = decls;
1269 BLOCK_TYPE_TAGS (block) = tags;
1270 BLOCK_SUBBLOCKS (block) = subblocks;
1271 /* Otherwise, for a new block, install a new BLOCK_END_NOTE
1273 remember_end_note (block);
1277 /* In each subblock, record that this is its superior. */
1280 for (link = subblocks; link; link = TREE_CHAIN (link))
1281 BLOCK_SUPERCONTEXT (link) = block;
1283 /* We still support the old for-scope rules, whereby the variables
1284 in a for-init statement were in scope after the for-statement
1285 ended. We only use the new rules in flag_new_for_scope is
1288 = current_binding_level->is_for_scope && flag_new_for_scope == 1;
1290 /* Remove declarations for all the DECLs in this level. */
1291 for (link = decls; link; link = TREE_CHAIN (link))
1293 if (leaving_for_scope && TREE_CODE (link) == VAR_DECL)
1296 = TREE_CHAIN (IDENTIFIER_BINDING (DECL_NAME (link)));
1300 ns_binding = IDENTIFIER_NAMESPACE_VALUE (DECL_NAME (link));
1302 ns_binding = NULL_TREE;
1305 && (BINDING_LEVEL (outer_binding)
1306 == current_binding_level->level_chain))
1307 /* We have something like:
1312 and we are leaving the `for' scope. There's no reason to
1313 keep the binding of the inner `i' in this case. */
1314 pop_binding (DECL_NAME (link), link);
1315 else if ((outer_binding
1316 && (TREE_CODE (BINDING_VALUE (outer_binding))
1319 && TREE_CODE (ns_binding) == TYPE_DECL))
1320 /* Here, we have something like:
1328 We must pop the for-scope binding so we know what's a
1329 type and what isn't. */
1330 pop_binding (DECL_NAME (link), link);
1333 /* Mark this VAR_DECL as dead so that we can tell we left it
1334 there only for backward compatibility. */
1335 DECL_DEAD_FOR_LOCAL (link) = 1;
1337 /* Keep track of what should of have happenned when we
1338 popped the binding. */
1339 if (outer_binding && BINDING_VALUE (outer_binding))
1340 DECL_SHADOWED_FOR_VAR (link)
1341 = BINDING_VALUE (outer_binding);
1343 /* Add it to the list of dead variables in the next
1344 outermost binding to that we can remove these when we
1345 leave that binding. */
1346 current_binding_level->level_chain->dead_vars_from_for
1347 = tree_cons (NULL_TREE, link,
1348 current_binding_level->level_chain->
1349 dead_vars_from_for);
1351 /* Although we don't pop the CPLUS_BINDING, we do clear
1352 its BINDING_LEVEL since the level is going away now. */
1353 BINDING_LEVEL (IDENTIFIER_BINDING (DECL_NAME (link)))
1359 /* Remove the binding. */
1361 if (TREE_CODE (decl) == TREE_LIST)
1362 decl = TREE_VALUE (decl);
1363 if (TREE_CODE_CLASS (TREE_CODE (decl)) == 'd')
1364 pop_binding (DECL_NAME (decl), decl);
1365 else if (TREE_CODE (decl) == OVERLOAD)
1366 pop_binding (DECL_NAME (OVL_FUNCTION (decl)), decl);
1368 my_friendly_abort (0);
1372 /* Remove declarations for any `for' variables from inner scopes
1373 that we kept around. */
1374 for (link = current_binding_level->dead_vars_from_for;
1375 link; link = TREE_CHAIN (link))
1376 pop_binding (DECL_NAME (TREE_VALUE (link)), TREE_VALUE (link));
1378 /* Restore the IDENTIFIER_TYPE_VALUEs. */
1379 for (link = current_binding_level->type_shadowed;
1380 link; link = TREE_CHAIN (link))
1381 SET_IDENTIFIER_TYPE_VALUE (TREE_PURPOSE (link), TREE_VALUE (link));
1383 /* Restore the IDENTIFIER_LABEL_VALUEs for local labels. */
1384 for (link = current_binding_level->shadowed_labels;
1386 link = TREE_CHAIN (link))
1389 /* There may be OVERLOADs (wrapped in TREE_LISTs) on the BLOCK_VARs
1390 list if a `using' declaration put them there. The debugging
1391 back-ends won't understand OVERLOAD, so we remove them here.
1392 Because the BLOCK_VARS are (temporarily) shared with
1393 CURRENT_BINDING_LEVEL->NAMES we must do this fixup after we have
1394 popped all the bindings. */
1399 for (d = &BLOCK_VARS (block); *d; )
1401 if (TREE_CODE (*d) == TREE_LIST)
1402 *d = TREE_CHAIN (*d);
1404 d = &TREE_CHAIN (*d);
1408 /* If the level being exited is the top level of a function,
1409 check over all the labels. */
1412 /* Since this is the top level block of a function, the vars are
1413 the function's parameters. Don't leave them in the BLOCK
1414 because they are found in the FUNCTION_DECL instead. */
1415 BLOCK_VARS (block) = 0;
1419 /* Any uses of undefined labels now operate under constraints
1420 of next binding contour. */
1421 if (current_function)
1423 struct binding_level *level_chain;
1424 level_chain = current_binding_level->level_chain;
1427 struct named_label_list *labels;
1428 for (labels = named_label_uses; labels; labels = labels->next)
1429 if (labels->binding_level == current_binding_level)
1431 labels->binding_level = level_chain;
1432 labels->names_in_scope = level_chain->names;
1437 tmp = current_binding_level->keep;
1439 pop_binding_level ();
1441 DECL_INITIAL (current_function_decl) = block;
1444 if (!block_previously_created)
1445 current_binding_level->blocks
1446 = chainon (current_binding_level->blocks, block);
1448 /* If we did not make a block for the level just exited,
1449 any blocks made for inner levels
1450 (since they cannot be recorded as subblocks in that level)
1451 must be carried forward so they will later become subblocks
1452 of something else. */
1454 current_binding_level->blocks
1455 = chainon (current_binding_level->blocks, subblocks);
1457 /* Take care of compiler's internal binding structures. */
1460 expand_end_bindings (getdecls (), keep, 1);
1461 /* Each and every BLOCK node created here in `poplevel' is important
1462 (e.g. for proper debugging information) so if we created one
1463 earlier, mark it as "used". */
1465 TREE_USED (block) = 1;
1466 block = poplevel (keep, reverse, real_functionbody);
1469 /* Each and every BLOCK node created here in `poplevel' is important
1470 (e.g. for proper debugging information) so if we created one
1471 earlier, mark it as "used". */
1473 TREE_USED (block) = 1;
1477 /* Delete the node BLOCK from the current binding level.
1478 This is used for the block inside a stmt expr ({...})
1479 so that the block can be reinserted where appropriate. */
1482 delete_block (block)
1486 if (current_binding_level->blocks == block)
1487 current_binding_level->blocks = TREE_CHAIN (block);
1488 for (t = current_binding_level->blocks; t;)
1490 if (TREE_CHAIN (t) == block)
1491 TREE_CHAIN (t) = TREE_CHAIN (block);
1495 TREE_CHAIN (block) = NULL_TREE;
1496 /* Clear TREE_USED which is always set by poplevel.
1497 The flag is set again if insert_block is called. */
1498 TREE_USED (block) = 0;
1501 /* Insert BLOCK at the end of the list of subblocks of the
1502 current binding level. This is used when a BIND_EXPR is expanded,
1503 to handle the BLOCK node inside the BIND_EXPR. */
1506 insert_block (block)
1509 TREE_USED (block) = 1;
1510 current_binding_level->blocks
1511 = chainon (current_binding_level->blocks, block);
1514 /* Set the BLOCK node for the innermost scope
1515 (the one we are currently in). */
1519 register tree block;
1521 current_binding_level->this_block = block;
1524 /* Do a pushlevel for class declarations. */
1529 register struct binding_level *newlevel;
1531 /* Reuse or create a struct for this binding level. */
1532 #if defined(DEBUG_CP_BINDING_LEVELS)
1534 #else /* !defined(DEBUG_CP_BINDING_LEVELS) */
1535 if (free_binding_level)
1536 #endif /* !defined(DEBUG_CP_BINDING_LEVELS) */
1538 newlevel = free_binding_level;
1539 free_binding_level = free_binding_level->level_chain;
1542 newlevel = make_binding_level ();
1544 #if defined(DEBUG_CP_BINDING_LEVELS)
1546 #endif /* defined(DEBUG_CP_BINDING_LEVELS) */
1548 push_binding_level (newlevel, 0, 0);
1550 class_binding_level = current_binding_level;
1551 class_binding_level->parm_flag = 2;
1554 /* ...and a poplevel for class declarations. */
1559 register struct binding_level *level = class_binding_level;
1562 my_friendly_assert (level != 0, 354);
1564 /* If we're leaving a toplevel class, don't bother to do the setting
1565 of IDENTIFIER_CLASS_VALUE to NULL_TREE, since first of all this slot
1566 shouldn't even be used when current_class_type isn't set, and second,
1567 if we don't touch it here, we're able to use the cache effect if the
1568 next time we're entering a class scope, it is the same class. */
1569 if (current_class_depth != 1)
1571 struct binding_level* b;
1573 /* Clear out our IDENTIFIER_CLASS_VALUEs. */
1574 for (shadowed = level->class_shadowed;
1576 shadowed = TREE_CHAIN (shadowed))
1577 IDENTIFIER_CLASS_VALUE (TREE_PURPOSE (shadowed)) = NULL_TREE;
1579 /* Find the next enclosing class, and recreate
1580 IDENTIFIER_CLASS_VALUEs appropriate for that class. */
1581 b = level->level_chain;
1582 while (b && b->parm_flag != 2)
1586 for (shadowed = b->class_shadowed;
1588 shadowed = TREE_CHAIN (shadowed))
1592 t = IDENTIFIER_BINDING (TREE_PURPOSE (shadowed));
1593 while (t && BINDING_LEVEL (t) != b)
1597 IDENTIFIER_CLASS_VALUE (TREE_PURPOSE (shadowed))
1598 = BINDING_VALUE (t);
1602 /* Remember to save what IDENTIFIER's were bound in this scope so we
1603 can recover from cache misses. */
1605 previous_class_type = current_class_type;
1606 previous_class_values = class_binding_level->class_shadowed;
1608 for (shadowed = level->type_shadowed;
1610 shadowed = TREE_CHAIN (shadowed))
1611 SET_IDENTIFIER_TYPE_VALUE (TREE_PURPOSE (shadowed), TREE_VALUE (shadowed));
1613 /* Remove the bindings for all of the class-level declarations. */
1614 for (shadowed = level->class_shadowed;
1616 shadowed = TREE_CHAIN (shadowed))
1617 pop_binding (TREE_PURPOSE (shadowed), TREE_TYPE (shadowed));
1619 GNU_xref_end_scope ((HOST_WIDE_INT) class_binding_level,
1620 (HOST_WIDE_INT) class_binding_level->level_chain,
1621 class_binding_level->parm_flag,
1622 class_binding_level->keep);
1624 /* Now, pop out of the binding level which we created up in the
1625 `pushlevel_class' routine. */
1626 #if defined(DEBUG_CP_BINDING_LEVELS)
1628 #endif /* defined(DEBUG_CP_BINDING_LEVELS) */
1630 pop_binding_level ();
1633 /* We are entering the scope of a class. Clear IDENTIFIER_CLASS_VALUE
1634 for any names in enclosing classes. */
1637 clear_identifier_class_values ()
1641 if (!class_binding_level)
1644 for (t = class_binding_level->class_shadowed;
1647 IDENTIFIER_CLASS_VALUE (TREE_PURPOSE (t)) = NULL_TREE;
1650 /* Returns non-zero if T is a virtual function table. */
1653 vtable_decl_p (t, data)
1655 void *data ATTRIBUTE_UNUSED;
1657 return (TREE_CODE (t) == VAR_DECL && DECL_VIRTUAL_P (t));
1660 /* Returns non-zero if T is a TYPE_DECL for a type with virtual
1664 vtype_decl_p (t, data)
1666 void *data ATTRIBUTE_UNUSED;
1668 return (TREE_CODE (t) == TYPE_DECL
1669 && TREE_TYPE (t) != error_mark_node
1670 && TYPE_LANG_SPECIFIC (TREE_TYPE (t))
1671 && CLASSTYPE_VSIZE (TREE_TYPE (t)));
1674 /* Return the declarations that are members of the namespace NS. */
1677 cp_namespace_decls (ns)
1680 return NAMESPACE_LEVEL (ns)->names;
1683 /* Walk all the namespaces contained NAMESPACE, including NAMESPACE
1684 itself, calling F for each. The DATA is passed to F as well. */
1687 walk_namespaces_r (namespace, f, data)
1689 walk_namespaces_fn f;
1695 result |= (*f) (namespace, data);
1697 for (current = cp_namespace_decls (namespace);
1699 current = TREE_CHAIN (current))
1701 if (TREE_CODE (current) != NAMESPACE_DECL
1702 || DECL_NAMESPACE_ALIAS (current))
1704 if (!DECL_LANG_SPECIFIC (current))
1707 my_friendly_assert (current == std_node, 393);
1711 /* We found a namespace. */
1712 result |= walk_namespaces_r (current, f, data);
1718 /* Walk all the namespaces, calling F for each. The DATA is passed to
1722 walk_namespaces (f, data)
1723 walk_namespaces_fn f;
1726 return walk_namespaces_r (global_namespace, f, data);
1729 struct walk_globals_data {
1730 walk_globals_pred p;
1735 /* Walk the global declarations in NAMESPACE. Whenever one is found
1736 for which P returns non-zero, call F with its address. If any call
1737 to F returns a non-zero value, return a non-zero value. */
1740 walk_globals_r (namespace, data)
1744 struct walk_globals_data* wgd = (struct walk_globals_data *) data;
1745 walk_globals_pred p = wgd->p;
1746 walk_globals_fn f = wgd->f;
1747 void *d = wgd->data;
1751 t = &NAMESPACE_LEVEL (namespace)->names;
1758 result |= (*f) (t, d);
1760 /* If F changed *T, then *T still points at the next item to
1763 t = &TREE_CHAIN (*t);
1769 /* Walk the global declarations. Whenever one is found for which P
1770 returns non-zero, call F with its address. If any call to F
1771 returns a non-zero value, return a non-zero value. */
1774 walk_globals (p, f, data)
1775 walk_globals_pred p;
1779 struct walk_globals_data wgd;
1784 return walk_namespaces (walk_globals_r, &wgd);
1787 /* Call wrapup_globals_declarations for the globals in NAMESPACE. If
1788 DATA is non-NULL, this is the last time we will call
1789 wrapup_global_declarations for this NAMESPACE. */
1792 wrapup_globals_for_namespace (namespace, data)
1796 tree globals = cp_namespace_decls (namespace);
1797 int len = list_length (globals);
1798 tree *vec = (tree *) alloca (sizeof (tree) * len);
1802 int last_time = (data != 0);
1804 if (last_time && namespace == global_namespace)
1805 /* Let compile_file handle the global namespace. */
1808 /* Process the decls in reverse order--earliest first.
1809 Put them into VEC from back to front, then take out from front. */
1811 for (i = 0, decl = globals; i < len; i++, decl = TREE_CHAIN (decl))
1812 vec[len - i - 1] = decl;
1816 check_global_declarations (vec, len);
1820 /* Temporarily mark vtables as external. That prevents
1821 wrapup_global_declarations from writing them out; we must process
1822 them ourselves in finish_vtable_vardecl. */
1823 for (i = 0; i < len; ++i)
1824 if (vtable_decl_p (vec[i], /*data=*/0) && !DECL_EXTERNAL (vec[i]))
1826 DECL_NOT_REALLY_EXTERN (vec[i]) = 1;
1827 DECL_EXTERNAL (vec[i]) = 1;
1830 /* Write out any globals that need to be output. */
1831 result = wrapup_global_declarations (vec, len);
1833 /* Undo the hack to DECL_EXTERNAL above. */
1834 for (i = 0; i < len; ++i)
1835 if (vtable_decl_p (vec[i], /*data=*/0)
1836 && DECL_NOT_REALLY_EXTERN (vec[i]))
1838 DECL_NOT_REALLY_EXTERN (vec[i]) = 0;
1839 DECL_EXTERNAL (vec[i]) = 0;
1846 /* Mark ARG (which is really a struct binding_level **) for GC. */
1849 mark_binding_level (arg)
1852 struct binding_level *lvl = *(struct binding_level **)arg;
1856 ggc_mark_tree (lvl->names);
1857 ggc_mark_tree (lvl->tags);
1858 ggc_mark_tree (lvl->usings);
1859 ggc_mark_tree (lvl->using_directives);
1860 ggc_mark_tree (lvl->class_shadowed);
1861 ggc_mark_tree (lvl->type_shadowed);
1862 ggc_mark_tree (lvl->shadowed_labels);
1863 ggc_mark_tree (lvl->blocks);
1864 ggc_mark_tree (lvl->this_block);
1865 ggc_mark_tree (lvl->incomplete);
1866 ggc_mark_tree (lvl->dead_vars_from_for);
1868 lvl = lvl->level_chain;
1872 /* For debugging. */
1873 static int no_print_functions = 0;
1874 static int no_print_builtins = 0;
1877 print_binding_level (lvl)
1878 struct binding_level *lvl;
1882 fprintf (stderr, " blocks=");
1883 fprintf (stderr, HOST_PTR_PRINTF, lvl->blocks);
1884 fprintf (stderr, " n_incomplete=%d parm_flag=%d keep=%d",
1885 list_length (lvl->incomplete), lvl->parm_flag, lvl->keep);
1886 if (lvl->tag_transparent)
1887 fprintf (stderr, " tag-transparent");
1888 if (lvl->more_cleanups_ok)
1889 fprintf (stderr, " more-cleanups-ok");
1890 if (lvl->have_cleanups)
1891 fprintf (stderr, " have-cleanups");
1892 fprintf (stderr, "\n");
1895 fprintf (stderr, " names:\t");
1896 /* We can probably fit 3 names to a line? */
1897 for (t = lvl->names; t; t = TREE_CHAIN (t))
1899 if (no_print_functions && (TREE_CODE (t) == FUNCTION_DECL))
1901 if (no_print_builtins
1902 && (TREE_CODE (t) == TYPE_DECL)
1903 && (!strcmp (DECL_SOURCE_FILE (t),"<built-in>")))
1906 /* Function decls tend to have longer names. */
1907 if (TREE_CODE (t) == FUNCTION_DECL)
1914 fprintf (stderr, "\n\t");
1917 print_node_brief (stderr, "", t, 0);
1918 if (t == error_mark_node)
1922 fprintf (stderr, "\n");
1926 fprintf (stderr, " tags:\t");
1928 for (t = lvl->tags; t; t = TREE_CHAIN (t))
1930 if (TREE_PURPOSE (t) == NULL_TREE)
1932 else if (TREE_PURPOSE (t) == TYPE_IDENTIFIER (TREE_VALUE (t)))
1939 fprintf (stderr, "\n\t");
1942 if (TREE_PURPOSE (t) == NULL_TREE)
1944 print_node_brief (stderr, "<unnamed-typedef", TREE_VALUE (t), 0);
1945 fprintf (stderr, ">");
1947 else if (TREE_PURPOSE (t) == TYPE_IDENTIFIER (TREE_VALUE (t)))
1948 print_node_brief (stderr, "", TREE_VALUE (t), 0);
1951 print_node_brief (stderr, "<typedef", TREE_PURPOSE (t), 0);
1952 print_node_brief (stderr, "", TREE_VALUE (t), 0);
1953 fprintf (stderr, ">");
1957 fprintf (stderr, "\n");
1959 if (lvl->class_shadowed)
1961 fprintf (stderr, " class-shadowed:");
1962 for (t = lvl->class_shadowed; t; t = TREE_CHAIN (t))
1964 fprintf (stderr, " %s ", IDENTIFIER_POINTER (TREE_PURPOSE (t)));
1966 fprintf (stderr, "\n");
1968 if (lvl->type_shadowed)
1970 fprintf (stderr, " type-shadowed:");
1971 for (t = lvl->type_shadowed; t; t = TREE_CHAIN (t))
1973 fprintf (stderr, " %s ", IDENTIFIER_POINTER (TREE_PURPOSE (t)));
1975 fprintf (stderr, "\n");
1980 print_other_binding_stack (stack)
1981 struct binding_level *stack;
1983 struct binding_level *level;
1984 for (level = stack; level != global_binding_level; level = level->level_chain)
1986 fprintf (stderr, "binding level ");
1987 fprintf (stderr, HOST_PTR_PRINTF, level);
1988 fprintf (stderr, "\n");
1989 print_binding_level (level);
1994 print_binding_stack ()
1996 struct binding_level *b;
1997 fprintf (stderr, "current_binding_level=");
1998 fprintf (stderr, HOST_PTR_PRINTF, current_binding_level);
1999 fprintf (stderr, "\nclass_binding_level=");
2000 fprintf (stderr, HOST_PTR_PRINTF, class_binding_level);
2001 fprintf (stderr, "\nglobal_binding_level=");
2002 fprintf (stderr, HOST_PTR_PRINTF, global_binding_level);
2003 fprintf (stderr, "\n");
2004 if (class_binding_level)
2006 for (b = class_binding_level; b; b = b->level_chain)
2007 if (b == current_binding_level)
2010 b = class_binding_level;
2012 b = current_binding_level;
2015 b = current_binding_level;
2016 print_other_binding_stack (b);
2017 fprintf (stderr, "global:\n");
2018 print_binding_level (global_binding_level);
2021 /* Namespace binding access routines: The namespace_bindings field of
2022 the identifier is polymorphic, with three possible values:
2023 NULL_TREE, a list of CPLUS_BINDINGS, or any other tree_node
2024 indicating the BINDING_VALUE of global_namespace. */
2026 /* Check whether the a binding for the name to scope is known.
2027 Assumes that the bindings of the name are already a list
2028 of bindings. Returns the binding found, or NULL_TREE. */
2031 find_binding (name, scope)
2035 tree iter, prev = NULL_TREE;
2037 scope = ORIGINAL_NAMESPACE (scope);
2039 for (iter = IDENTIFIER_NAMESPACE_BINDINGS (name); iter;
2040 iter = TREE_CHAIN (iter))
2042 my_friendly_assert (TREE_CODE (iter) == CPLUS_BINDING, 374);
2043 if (BINDING_SCOPE (iter) == scope)
2045 /* Move binding found to the front of the list, so
2046 subsequent lookups will find it faster. */
2049 TREE_CHAIN (prev) = TREE_CHAIN (iter);
2050 TREE_CHAIN (iter) = IDENTIFIER_NAMESPACE_BINDINGS (name);
2051 IDENTIFIER_NAMESPACE_BINDINGS (name) = iter;
2060 /* Always returns a binding for name in scope. If the
2061 namespace_bindings is not a list, convert it to one first.
2062 If no binding is found, make a new one. */
2065 binding_for_name (name, scope)
2069 tree b = IDENTIFIER_NAMESPACE_BINDINGS (name);
2072 scope = ORIGINAL_NAMESPACE (scope);
2074 if (b && TREE_CODE (b) != CPLUS_BINDING)
2076 /* Get rid of optimization for global scope. */
2077 IDENTIFIER_NAMESPACE_BINDINGS (name) = NULL_TREE;
2078 BINDING_VALUE (binding_for_name (name, global_namespace)) = b;
2079 b = IDENTIFIER_NAMESPACE_BINDINGS (name);
2081 if (b && (result = find_binding (name, scope)))
2083 /* Not found, make a new permanent one. */
2084 push_obstacks (&permanent_obstack, &permanent_obstack);
2085 result = make_node (CPLUS_BINDING);
2086 TREE_CHAIN (result) = b;
2087 IDENTIFIER_NAMESPACE_BINDINGS (name) = result;
2088 BINDING_SCOPE (result) = scope;
2089 BINDING_TYPE (result) = NULL_TREE;
2090 BINDING_VALUE (result) = NULL_TREE;
2095 /* Return the binding value for name in scope, considering that
2096 namespace_binding may or may not be a list of CPLUS_BINDINGS. */
2099 namespace_binding (name, scope)
2103 tree b = IDENTIFIER_NAMESPACE_BINDINGS (name);
2106 if (scope == NULL_TREE)
2107 scope = global_namespace;
2108 if (TREE_CODE (b) != CPLUS_BINDING)
2109 return (scope == global_namespace) ? b : NULL_TREE;
2110 name = find_binding (name,scope);
2111 if (name == NULL_TREE)
2113 return BINDING_VALUE (name);
2116 /* Set the binding value for name in scope. If modifying the binding
2117 of global_namespace is attempted, try to optimize it. */
2120 set_namespace_binding (name, scope, val)
2127 if (scope == NULL_TREE)
2128 scope = global_namespace;
2130 if (scope == global_namespace)
2132 b = IDENTIFIER_NAMESPACE_BINDINGS (name);
2133 if (b == NULL_TREE || TREE_CODE (b) != CPLUS_BINDING)
2135 IDENTIFIER_NAMESPACE_BINDINGS (name) = val;
2139 b = binding_for_name (name, scope);
2140 BINDING_VALUE (b) = val;
2143 /* Push into the scope of the NAME namespace. If NAME is NULL_TREE, then we
2144 select a name that is unique to this compilation unit. */
2147 push_namespace (name)
2152 int implicit_use = 0;
2154 if (!global_namespace)
2156 /* This must be ::. */
2157 my_friendly_assert (name == get_identifier ("::"), 377);
2162 /* The name of anonymous namespace is unique for the translation
2164 if (!anonymous_namespace_name)
2165 anonymous_namespace_name = get_file_function_name ('N');
2166 name = anonymous_namespace_name;
2167 d = IDENTIFIER_NAMESPACE_VALUE (name);
2169 /* Reopening anonymous namespace. */
2173 else if (current_namespace == global_namespace
2174 && name == DECL_NAME (std_node))
2181 /* Check whether this is an extended namespace definition. */
2182 d = IDENTIFIER_NAMESPACE_VALUE (name);
2183 if (d != NULL_TREE && TREE_CODE (d) == NAMESPACE_DECL)
2186 if (DECL_NAMESPACE_ALIAS (d))
2188 cp_error ("namespace alias `%D' not allowed here, assuming `%D'",
2189 d, DECL_NAMESPACE_ALIAS (d));
2190 d = DECL_NAMESPACE_ALIAS (d);
2197 /* Make a new namespace, binding the name to it. */
2198 d = build_lang_decl (NAMESPACE_DECL, name, void_type_node);
2199 /* The global namespace is not pushed, and the global binding
2200 level is set elsewhere. */
2205 declare_namespace_level ();
2206 NAMESPACE_LEVEL (d) = current_binding_level;
2210 resume_binding_level (NAMESPACE_LEVEL (d));
2213 do_using_directive (d);
2214 /* Enter the name space. */
2215 current_namespace = d;
2218 /* Pop from the scope of the current namespace. */
2223 if (current_namespace == global_namespace)
2225 my_friendly_assert (in_std>0, 980421);
2229 current_namespace = CP_DECL_CONTEXT (current_namespace);
2230 /* The binding level is not popped, as it might be re-opened later. */
2231 suspend_binding_level ();
2234 /* Push into the scope of the namespace NS, even if it is deeply
2235 nested within another namespace. */
2238 push_nested_namespace (ns)
2241 if (ns == global_namespace)
2242 push_to_top_level ();
2245 push_nested_namespace (CP_DECL_CONTEXT (ns));
2246 push_namespace (DECL_NAME (ns));
2250 /* Pop back from the scope of the namespace NS, which was previously
2251 entered with push_nested_namespace. */
2254 pop_nested_namespace (ns)
2257 while (ns != global_namespace)
2260 ns = CP_DECL_CONTEXT (ns);
2263 pop_from_top_level ();
2267 /* Subroutines for reverting temporarily to top-level for instantiation
2268 of templates and such. We actually need to clear out the class- and
2269 local-value slots of all identifiers, so that only the global values
2270 are at all visible. Simply setting current_binding_level to the global
2271 scope isn't enough, because more binding levels may be pushed. */
2272 struct saved_scope *scope_chain;
2274 /* Mark ARG (which is really a struct saved_scope **) for GC. */
2277 mark_saved_scope (arg)
2280 struct saved_scope *t = *(struct saved_scope **)arg;
2283 mark_binding_level (&t->class_bindings);
2284 ggc_mark_tree (t->old_bindings);
2285 ggc_mark_tree (t->old_namespace);
2286 ggc_mark_tree (t->class_name);
2287 ggc_mark_tree (t->class_type);
2288 ggc_mark_tree (t->access_specifier);
2289 ggc_mark_tree (t->function_decl);
2291 ggc_mark_tree_varray (t->lang_base);
2292 ggc_mark_tree (t->lang_name);
2293 ggc_mark_tree (t->x_function_parms);
2294 ggc_mark_tree (t->template_parms);
2295 ggc_mark_tree (t->x_previous_class_type);
2296 ggc_mark_tree (t->x_previous_class_values);
2297 mark_binding_level (&t->bindings);
2303 store_bindings (names, old_bindings)
2304 tree names, old_bindings;
2307 for (t = names; t; t = TREE_CHAIN (t))
2309 tree binding, t1, id;
2311 if (TREE_CODE (t) == TREE_LIST)
2312 id = TREE_PURPOSE (t);
2317 /* Note that we may have an IDENTIFIER_CLASS_VALUE even when
2318 we have no IDENTIFIER_BINDING if we have left the class
2319 scope, but cached the class-level declarations. */
2320 || !(IDENTIFIER_BINDING (id) || IDENTIFIER_CLASS_VALUE (id)))
2323 for (t1 = old_bindings; t1; t1 = TREE_CHAIN (t1))
2324 if (TREE_VEC_ELT (t1, 0) == id)
2327 binding = make_tree_vec (4);
2331 my_friendly_assert (TREE_CODE (id) == IDENTIFIER_NODE, 135);
2332 TREE_VEC_ELT (binding, 0) = id;
2333 TREE_VEC_ELT (binding, 1) = REAL_IDENTIFIER_TYPE_VALUE (id);
2334 TREE_VEC_ELT (binding, 2) = IDENTIFIER_BINDING (id);
2335 TREE_VEC_ELT (binding, 3) = IDENTIFIER_CLASS_VALUE (id);
2336 IDENTIFIER_BINDING (id) = NULL_TREE;
2337 IDENTIFIER_CLASS_VALUE (id) = NULL_TREE;
2339 TREE_CHAIN (binding) = old_bindings;
2340 old_bindings = binding;
2344 return old_bindings;
2348 maybe_push_to_top_level (pseudo)
2351 struct saved_scope *s;
2352 struct binding_level *b;
2356 s = (struct saved_scope *) xcalloc (1, sizeof (struct saved_scope));
2358 b = scope_chain ? current_binding_level : 0;
2360 /* If we're in the middle of some function, save our state. */
2361 if (current_function)
2364 push_function_context_to (NULL_TREE);
2369 old_bindings = NULL_TREE;
2370 if (scope_chain && previous_class_type)
2371 old_bindings = store_bindings (previous_class_values, old_bindings);
2373 /* Have to include global_binding_level, because class-level decls
2374 aren't listed anywhere useful. */
2375 for (; b; b = b->level_chain)
2379 /* Template IDs are inserted into the global level. If they were
2380 inserted into namespace level, finish_file wouldn't find them
2381 when doing pending instantiations. Therefore, don't stop at
2382 namespace level, but continue until :: . */
2383 if (b == global_binding_level || (pseudo && b->pseudo_global))
2386 old_bindings = store_bindings (b->names, old_bindings);
2387 /* We also need to check class_shadowed to save class-level type
2388 bindings, since pushclass doesn't fill in b->names. */
2389 if (b->parm_flag == 2)
2390 old_bindings = store_bindings (b->class_shadowed, old_bindings);
2392 /* Unwind type-value slots back to top level. */
2393 for (t = b->type_shadowed; t; t = TREE_CHAIN (t))
2394 SET_IDENTIFIER_TYPE_VALUE (TREE_PURPOSE (t), TREE_VALUE (t));
2396 s->prev = scope_chain;
2397 s->old_bindings = old_bindings;
2399 s->need_pop_function_context = need_pop;
2400 s->function_decl = current_function_decl;
2403 current_function_decl = NULL_TREE;
2404 VARRAY_TREE_INIT (current_lang_base, 10, "current_lang_base");
2405 current_lang_stack = &VARRAY_TREE (current_lang_base, 0);
2406 current_lang_name = lang_name_cplusplus;
2407 strict_prototype = strict_prototypes_lang_cplusplus;
2408 current_namespace = global_namespace;
2410 push_obstacks (&permanent_obstack, &permanent_obstack);
2414 push_to_top_level ()
2416 maybe_push_to_top_level (0);
2420 pop_from_top_level ()
2422 struct saved_scope *s = scope_chain;
2425 /* Clear out class-level bindings cache. */
2426 if (previous_class_type)
2427 invalidate_class_lookup_cache ();
2431 VARRAY_FREE (current_lang_base);
2433 scope_chain = s->prev;
2434 for (t = s->old_bindings; t; t = TREE_CHAIN (t))
2436 tree id = TREE_VEC_ELT (t, 0);
2439 SET_IDENTIFIER_TYPE_VALUE (id, TREE_VEC_ELT (t, 1));
2440 IDENTIFIER_BINDING (id) = TREE_VEC_ELT (t, 2);
2441 IDENTIFIER_CLASS_VALUE (id) = TREE_VEC_ELT (t, 3);
2445 if (current_lang_name == lang_name_cplusplus)
2446 strict_prototype = strict_prototypes_lang_cplusplus;
2447 else if (current_lang_name == lang_name_c)
2448 strict_prototype = strict_prototypes_lang_c;
2450 /* If we were in the middle of compiling a function, restore our
2452 if (s->need_pop_function_context)
2453 pop_function_context_from (NULL_TREE);
2454 current_function_decl = s->function_decl;
2459 /* Push a definition of struct, union or enum tag "name".
2460 into binding_level "b". "type" should be the type node,
2461 We assume that the tag "name" is not already defined.
2463 Note that the definition may really be just a forward reference.
2464 In that case, the TYPE_SIZE will be a NULL_TREE.
2466 C++ gratuitously puts all these tags in the name space. */
2468 /* When setting the IDENTIFIER_TYPE_VALUE field of an identifier ID,
2469 record the shadowed value for this binding contour. TYPE is
2470 the type that ID maps to. */
2473 set_identifier_type_value_with_scope (id, type, b)
2476 struct binding_level *b;
2478 if (!b->namespace_p)
2480 /* Shadow the marker, not the real thing, so that the marker
2481 gets restored later. */
2482 tree old_type_value = REAL_IDENTIFIER_TYPE_VALUE (id);
2484 = tree_cons (id, old_type_value, b->type_shadowed);
2488 tree binding = binding_for_name (id, current_namespace);
2489 BINDING_TYPE (binding) = type;
2490 /* Store marker instead of real type. */
2491 type = global_type_node;
2493 SET_IDENTIFIER_TYPE_VALUE (id, type);
2496 /* As set_identifier_type_value_with_scope, but using current_binding_level. */
2499 set_identifier_type_value (id, type)
2503 set_identifier_type_value_with_scope (id, type, current_binding_level);
2506 /* Return the type associated with id. */
2509 identifier_type_value (id)
2512 /* There is no type with that name, anywhere. */
2513 if (REAL_IDENTIFIER_TYPE_VALUE (id) == NULL_TREE)
2515 /* This is not the type marker, but the real thing. */
2516 if (REAL_IDENTIFIER_TYPE_VALUE (id) != global_type_node)
2517 return REAL_IDENTIFIER_TYPE_VALUE (id);
2518 /* Have to search for it. It must be on the global level, now.
2519 Ask lookup_name not to return non-types. */
2520 id = lookup_name_real (id, 2, 1, 0);
2522 return TREE_TYPE (id);
2526 /* Pop off extraneous binding levels left over due to syntax errors.
2528 We don't pop past namespaces, as they might be valid. */
2533 #ifdef DEBUG_CP_BINDING_LEVELS
2534 fprintf (stderr, "XXX entering pop_everything ()\n");
2536 while (!toplevel_bindings_p ())
2538 if (current_binding_level->parm_flag == 2)
2539 pop_nested_class ();
2543 #ifdef DEBUG_CP_BINDING_LEVELS
2544 fprintf (stderr, "XXX leaving pop_everything ()\n");
2548 /* The type TYPE is being declared. If it is a class template, or a
2549 specialization of a class template, do any processing required and
2550 perform error-checking. If IS_FRIEND is non-zero, this TYPE is
2551 being declared a friend. B is the binding level at which this TYPE
2554 Returns the TYPE_DECL for TYPE, which may have been altered by this
2558 maybe_process_template_type_declaration (type, globalize, b)
2561 struct binding_level* b;
2563 tree decl = TYPE_NAME (type);
2565 if (processing_template_parmlist)
2566 /* You can't declare a new template type in a template parameter
2567 list. But, you can declare a non-template type:
2569 template <class A*> struct S;
2571 is a forward-declaration of `A'. */
2575 maybe_check_template_type (type);
2577 my_friendly_assert (IS_AGGR_TYPE (type)
2578 || TREE_CODE (type) == ENUMERAL_TYPE, 0);
2581 if (processing_template_decl)
2583 /* This may change after the call to
2584 push_template_decl_real, but we want the original value. */
2585 tree name = DECL_NAME (decl);
2587 decl = push_template_decl_real (decl, globalize);
2588 /* If the current binding level is the binding level for the
2589 template parameters (see the comment in
2590 begin_template_parm_list) and the enclosing level is a class
2591 scope, and we're not looking at a friend, push the
2592 declaration of the member class into the class scope. In the
2593 friend case, push_template_decl will already have put the
2594 friend into global scope, if appropriate. */
2595 if (TREE_CODE (type) != ENUMERAL_TYPE
2596 && !globalize && b->pseudo_global
2597 && b->level_chain->parm_flag == 2)
2599 finish_member_declaration (CLASSTYPE_TI_TEMPLATE (type));
2600 /* Put this tag on the list of tags for the class, since
2601 that won't happen below because B is not the class
2602 binding level, but is instead the pseudo-global level. */
2603 b->level_chain->tags =
2604 tree_cons (name, type, b->level_chain->tags);
2605 if (TYPE_SIZE (current_class_type) == NULL_TREE)
2606 CLASSTYPE_TAGS (current_class_type) = b->level_chain->tags;
2614 /* In C++, you don't have to write `struct S' to refer to `S'; you
2615 can just use `S'. We accomplish this by creating a TYPE_DECL as
2616 if the user had written `typedef struct S S'. Create and return
2617 the TYPE_DECL for TYPE. */
2620 create_implicit_typedef (name, type)
2626 decl = build_decl (TYPE_DECL, name, type);
2627 SET_DECL_ARTIFICIAL (decl);
2628 /* There are other implicit type declarations, like the one *within*
2629 a class that allows you to write `S::S'. We must distinguish
2631 SET_DECL_IMPLICIT_TYPEDEF_P (decl);
2632 TYPE_NAME (type) = decl;
2637 /* Push a tag name NAME for struct/class/union/enum type TYPE.
2638 Normally put it into the inner-most non-tag-transparent scope,
2639 but if GLOBALIZE is true, put it in the inner-most non-class scope.
2640 The latter is needed for implicit declarations. */
2643 pushtag (name, type, globalize)
2647 register struct binding_level *b;
2649 b = current_binding_level;
2650 while (b->tag_transparent
2651 || (globalize && b->parm_flag == 2))
2654 b->tags = tree_cons (name, type, b->tags);
2658 /* Do C++ gratuitous typedefing. */
2659 if (IDENTIFIER_TYPE_VALUE (name) != type)
2661 register tree d = NULL_TREE;
2663 tree context = TYPE_CONTEXT (type);
2667 tree cs = current_scope ();
2671 else if (cs != NULL_TREE
2672 && TREE_CODE_CLASS (TREE_CODE (cs)) == 't')
2673 /* When declaring a friend class of a local class, we want
2674 to inject the newly named class into the scope
2675 containing the local class, not the namespace scope. */
2676 context = hack_decl_function_context (get_type_decl (cs));
2679 context = current_namespace;
2681 if ((b->pseudo_global && b->level_chain->parm_flag == 2)
2682 || b->parm_flag == 2)
2685 if (current_lang_name == lang_name_java)
2686 TYPE_FOR_JAVA (type) = 1;
2688 d = create_implicit_typedef (name, type);
2689 DECL_CONTEXT (d) = FROB_CONTEXT (context);
2691 set_identifier_type_value_with_scope (name, type, b);
2693 d = maybe_process_template_type_declaration (type,
2696 if (b->parm_flag == 2)
2698 if (!PROCESSING_REAL_TEMPLATE_DECL_P ())
2699 /* Put this TYPE_DECL on the TYPE_FIELDS list for the
2700 class. But if it's a member template class, we
2701 want the TEMPLATE_DECL, not the TYPE_DECL, so this
2703 finish_member_declaration (d);
2705 pushdecl_class_level (d);
2708 d = pushdecl_with_scope (d, b);
2710 if (ANON_AGGRNAME_P (name))
2711 DECL_IGNORED_P (d) = 1;
2713 TYPE_CONTEXT (type) = DECL_CONTEXT (d);
2714 DECL_ASSEMBLER_NAME (d) = DECL_NAME (d);
2715 if (!uses_template_parms (type))
2716 DECL_ASSEMBLER_NAME (d)
2717 = get_identifier (build_overload_name (type, 1, 1));
2719 if (b->parm_flag == 2)
2721 if (TYPE_SIZE (current_class_type) == NULL_TREE)
2722 CLASSTYPE_TAGS (current_class_type) = b->tags;
2726 if (TREE_CODE (TYPE_NAME (type)) == TYPE_DECL)
2727 /* Use the canonical TYPE_DECL for this node. */
2728 TYPE_STUB_DECL (type) = TYPE_NAME (type);
2731 /* Create a fake NULL-named TYPE_DECL node whose TREE_TYPE
2732 will be the tagged type we just added to the current
2733 binding level. This fake NULL-named TYPE_DECL node helps
2734 dwarfout.c to know when it needs to output a
2735 representation of a tagged type, and it also gives us a
2736 convenient place to record the "scope start" address for
2739 tree d = build_decl (TYPE_DECL, NULL_TREE, type);
2740 TYPE_STUB_DECL (type) = pushdecl_with_scope (d, b);
2744 /* Counter used to create anonymous type names. */
2746 static int anon_cnt = 0;
2748 /* Return an IDENTIFIER which can be used as a name for
2749 anonymous structs and unions. */
2756 sprintf (buf, ANON_AGGRNAME_FORMAT, anon_cnt++);
2757 return get_identifier (buf);
2760 /* Clear the TREE_PURPOSE slot of tags which have anonymous typenames.
2761 This keeps dbxout from getting confused. */
2766 register struct binding_level *b;
2768 static int last_cnt = 0;
2770 /* Fast out if no new anon names were declared. */
2771 if (last_cnt == anon_cnt)
2774 b = current_binding_level;
2775 while (b->tag_transparent)
2780 /* A NULL purpose means we have already processed all tags
2781 from here to the end of the list. */
2782 if (TREE_PURPOSE (tags) == NULL_TREE)
2784 if (ANON_AGGRNAME_P (TREE_PURPOSE (tags)))
2785 TREE_PURPOSE (tags) = NULL_TREE;
2786 tags = TREE_CHAIN (tags);
2788 last_cnt = anon_cnt;
2791 /* Subroutine of duplicate_decls: return truthvalue of whether
2792 or not types of these decls match.
2794 For C++, we must compare the parameter list so that `int' can match
2795 `int&' in a parameter position, but `int&' is not confused with
2799 decls_match (newdecl, olddecl)
2800 tree newdecl, olddecl;
2804 if (newdecl == olddecl)
2807 if (TREE_CODE (newdecl) != TREE_CODE (olddecl))
2808 /* If the two DECLs are not even the same kind of thing, we're not
2809 interested in their types. */
2812 if (TREE_CODE (newdecl) == FUNCTION_DECL)
2814 tree f1 = TREE_TYPE (newdecl);
2815 tree f2 = TREE_TYPE (olddecl);
2816 tree p1 = TYPE_ARG_TYPES (f1);
2817 tree p2 = TYPE_ARG_TYPES (f2);
2819 if (DECL_REAL_CONTEXT (newdecl) != DECL_REAL_CONTEXT (olddecl)
2820 && ! (DECL_LANGUAGE (newdecl) == lang_c
2821 && DECL_LANGUAGE (olddecl) == lang_c))
2824 /* When we parse a static member function definition,
2825 we put together a FUNCTION_DECL which thinks its type
2826 is METHOD_TYPE. Change that to FUNCTION_TYPE, and
2828 if (TREE_CODE (f1) == METHOD_TYPE && DECL_STATIC_FUNCTION_P (olddecl))
2829 revert_static_member_fn (&newdecl, &f1, &p1);
2830 else if (TREE_CODE (f2) == METHOD_TYPE
2831 && DECL_STATIC_FUNCTION_P (newdecl))
2832 revert_static_member_fn (&olddecl, &f2, &p2);
2834 /* Here we must take care of the case where new default
2835 parameters are specified. Also, warn if an old
2836 declaration becomes ambiguous because default
2837 parameters may cause the two to be ambiguous. */
2838 if (TREE_CODE (f1) != TREE_CODE (f2))
2840 if (TREE_CODE (f1) == OFFSET_TYPE)
2841 cp_compiler_error ("`%D' redeclared as member function", newdecl);
2843 cp_compiler_error ("`%D' redeclared as non-member function", newdecl);
2847 if (same_type_p (TREE_TYPE (f1), TREE_TYPE (f2)))
2849 if (! strict_prototypes_lang_c && DECL_LANGUAGE (olddecl) == lang_c
2852 types_match = self_promoting_args_p (p1);
2853 if (p1 == void_list_node)
2854 TREE_TYPE (newdecl) = TREE_TYPE (olddecl);
2856 else if (!strict_prototypes_lang_c && DECL_LANGUAGE (olddecl)==lang_c
2857 && DECL_LANGUAGE (newdecl) == lang_c && p1 == NULL_TREE)
2859 types_match = self_promoting_args_p (p2);
2860 TREE_TYPE (newdecl) = TREE_TYPE (olddecl);
2863 types_match = compparms (p1, p2);
2868 else if (TREE_CODE (newdecl) == TEMPLATE_DECL)
2870 if (!comp_template_parms (DECL_TEMPLATE_PARMS (newdecl),
2871 DECL_TEMPLATE_PARMS (olddecl)))
2874 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == TYPE_DECL)
2877 types_match = decls_match (DECL_TEMPLATE_RESULT (olddecl),
2878 DECL_TEMPLATE_RESULT (newdecl));
2882 if (TREE_TYPE (newdecl) == error_mark_node)
2883 types_match = TREE_TYPE (olddecl) == error_mark_node;
2884 else if (TREE_TYPE (olddecl) == NULL_TREE)
2885 types_match = TREE_TYPE (newdecl) == NULL_TREE;
2886 else if (TREE_TYPE (newdecl) == NULL_TREE)
2889 types_match = comptypes (TREE_TYPE (newdecl),
2890 TREE_TYPE (olddecl),
2891 COMPARE_REDECLARATION);
2897 /* If NEWDECL is `static' and an `extern' was seen previously,
2898 warn about it. OLDDECL is the previous declaration.
2900 Note that this does not apply to the C++ case of declaring
2901 a variable `extern const' and then later `const'.
2903 Don't complain about built-in functions, since they are beyond
2904 the user's control. */
2907 warn_extern_redeclared_static (newdecl, olddecl)
2908 tree newdecl, olddecl;
2910 static const char *explicit_extern_static_warning
2911 = "`%D' was declared `extern' and later `static'";
2912 static const char *implicit_extern_static_warning
2913 = "`%D' was declared implicitly `extern' and later `static'";
2917 if (TREE_CODE (newdecl) == TYPE_DECL)
2920 /* Don't get confused by static member functions; that's a different
2922 if (TREE_CODE (newdecl) == FUNCTION_DECL
2923 && DECL_STATIC_FUNCTION_P (newdecl))
2926 /* If the old declaration was `static', or the new one isn't, then
2927 then everything is OK. */
2928 if (DECL_THIS_STATIC (olddecl) || !DECL_THIS_STATIC (newdecl))
2931 /* It's OK to declare a builtin function as `static'. */
2932 if (TREE_CODE (olddecl) == FUNCTION_DECL
2933 && DECL_ARTIFICIAL (olddecl))
2936 name = DECL_ASSEMBLER_NAME (newdecl);
2937 cp_pedwarn (IDENTIFIER_IMPLICIT_DECL (name)
2938 ? implicit_extern_static_warning
2939 : explicit_extern_static_warning, newdecl);
2940 cp_pedwarn_at ("previous declaration of `%D'", olddecl);
2943 /* Handle when a new declaration NEWDECL has the same name as an old
2944 one OLDDECL in the same binding contour. Prints an error message
2947 If safely possible, alter OLDDECL to look like NEWDECL, and return 1.
2948 Otherwise, return 0. */
2951 duplicate_decls (newdecl, olddecl)
2952 tree newdecl, olddecl;
2954 unsigned olddecl_uid = DECL_UID (olddecl);
2955 int olddecl_friend = 0, types_match = 0;
2956 int new_defines_function = 0;
2958 if (newdecl == olddecl)
2961 types_match = decls_match (newdecl, olddecl);
2963 /* If either the type of the new decl or the type of the old decl is an
2964 error_mark_node, then that implies that we have already issued an
2965 error (earlier) for some bogus type specification, and in that case,
2966 it is rather pointless to harass the user with yet more error message
2967 about the same declaration, so just pretend the types match here. */
2968 if (TREE_TYPE (newdecl) == error_mark_node
2969 || TREE_TYPE (olddecl) == error_mark_node)
2972 /* Check for redeclaration and other discrepancies. */
2973 if (TREE_CODE (olddecl) == FUNCTION_DECL
2974 && DECL_ARTIFICIAL (olddecl))
2976 if (TREE_CODE (newdecl) != FUNCTION_DECL)
2978 /* If you declare a built-in or predefined function name as static,
2979 the old definition is overridden, but optionally warn this was a
2980 bad choice of name. */
2981 if (! TREE_PUBLIC (newdecl))
2984 cp_warning ("shadowing %s function `%#D'",
2985 DECL_BUILT_IN (olddecl) ? "built-in" : "library",
2987 /* Discard the old built-in function. */
2990 /* If the built-in is not ansi, then programs can override
2991 it even globally without an error. */
2992 else if (! DECL_BUILT_IN (olddecl))
2993 cp_warning ("library function `%#D' redeclared as non-function `%#D'",
2997 cp_error ("declaration of `%#D'", newdecl);
2998 cp_error ("conflicts with built-in declaration `%#D'",
3003 else if (!types_match)
3005 if ((DECL_LANGUAGE (newdecl) == lang_c
3006 && DECL_LANGUAGE (olddecl) == lang_c)
3007 || compparms (TYPE_ARG_TYPES (TREE_TYPE (newdecl)),
3008 TYPE_ARG_TYPES (TREE_TYPE (olddecl))))
3010 /* A near match; override the builtin. */
3012 if (TREE_PUBLIC (newdecl))
3014 cp_warning ("new declaration `%#D'", newdecl);
3015 cp_warning ("ambiguates built-in declaration `%#D'",
3018 else if (warn_shadow)
3019 cp_warning ("shadowing %s function `%#D'",
3020 DECL_BUILT_IN (olddecl) ? "built-in" : "library",
3024 /* Discard the old built-in function. */
3028 if (DECL_THIS_STATIC (newdecl) && !DECL_THIS_STATIC (olddecl))
3030 /* If a builtin function is redeclared as `static', merge
3031 the declarations, but make the original one static. */
3032 DECL_THIS_STATIC (olddecl) = 1;
3033 TREE_PUBLIC (olddecl) = 0;
3035 /* Make the olddeclaration consistent with the new one so that
3036 all remnants of the builtin-ness of this function will be
3038 DECL_LANGUAGE (olddecl) = DECL_LANGUAGE (newdecl);
3039 DECL_RTL (olddecl) = DECL_RTL (newdecl);
3040 DECL_ASSEMBLER_NAME (olddecl) = DECL_ASSEMBLER_NAME (newdecl);
3041 SET_IDENTIFIER_GLOBAL_VALUE (DECL_ASSEMBLER_NAME (newdecl),
3045 else if (TREE_CODE (olddecl) != TREE_CODE (newdecl))
3047 if ((TREE_CODE (olddecl) == TYPE_DECL && DECL_ARTIFICIAL (olddecl)
3048 && TREE_CODE (newdecl) != TYPE_DECL
3049 && ! (TREE_CODE (newdecl) == TEMPLATE_DECL
3050 && TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == TYPE_DECL))
3051 || (TREE_CODE (newdecl) == TYPE_DECL && DECL_ARTIFICIAL (newdecl)
3052 && TREE_CODE (olddecl) != TYPE_DECL
3053 && ! (TREE_CODE (olddecl) == TEMPLATE_DECL
3054 && (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl))
3057 /* We do nothing special here, because C++ does such nasty
3058 things with TYPE_DECLs. Instead, just let the TYPE_DECL
3059 get shadowed, and know that if we need to find a TYPE_DECL
3060 for a given name, we can look in the IDENTIFIER_TYPE_VALUE
3061 slot of the identifier. */
3065 if ((TREE_CODE (newdecl) == FUNCTION_DECL
3066 && DECL_FUNCTION_TEMPLATE_P (olddecl))
3067 || (TREE_CODE (olddecl) == FUNCTION_DECL
3068 && DECL_FUNCTION_TEMPLATE_P (newdecl)))
3071 cp_error ("`%#D' redeclared as different kind of symbol", newdecl);
3072 if (TREE_CODE (olddecl) == TREE_LIST)
3073 olddecl = TREE_VALUE (olddecl);
3074 cp_error_at ("previous declaration of `%#D'", olddecl);
3076 /* New decl is completely inconsistent with the old one =>
3077 tell caller to replace the old one. */
3081 else if (!types_match)
3083 if (DECL_REAL_CONTEXT (newdecl) != DECL_REAL_CONTEXT (olddecl))
3084 /* These are certainly not duplicate declarations; they're
3085 from different scopes. */
3088 if (TREE_CODE (newdecl) == TEMPLATE_DECL)
3090 /* The name of a class template may not be declared to refer to
3091 any other template, class, function, object, namespace, value,
3092 or type in the same scope. */
3093 if (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl)) == TYPE_DECL
3094 || TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == TYPE_DECL)
3096 cp_error ("declaration of template `%#D'", newdecl);
3097 cp_error_at ("conflicts with previous declaration `%#D'",
3100 else if (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl)) == FUNCTION_DECL
3101 && TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == FUNCTION_DECL
3102 && compparms (TYPE_ARG_TYPES (TREE_TYPE (DECL_TEMPLATE_RESULT (olddecl))),
3103 TYPE_ARG_TYPES (TREE_TYPE (DECL_TEMPLATE_RESULT (newdecl))))
3104 && comp_template_parms (DECL_TEMPLATE_PARMS (newdecl),
3105 DECL_TEMPLATE_PARMS (olddecl)))
3107 cp_error ("new declaration `%#D'", newdecl);
3108 cp_error_at ("ambiguates old declaration `%#D'", olddecl);
3112 if (TREE_CODE (newdecl) == FUNCTION_DECL)
3114 if (DECL_LANGUAGE (newdecl) == lang_c
3115 && DECL_LANGUAGE (olddecl) == lang_c)
3117 cp_error ("declaration of C function `%#D' conflicts with",
3119 cp_error_at ("previous declaration `%#D' here", olddecl);
3121 else if (compparms (TYPE_ARG_TYPES (TREE_TYPE (newdecl)),
3122 TYPE_ARG_TYPES (TREE_TYPE (olddecl))))
3124 cp_error ("new declaration `%#D'", newdecl);
3125 cp_error_at ("ambiguates old declaration `%#D'", olddecl);
3131 /* Already complained about this, so don't do so again. */
3132 else if (current_class_type == NULL_TREE
3133 || IDENTIFIER_ERROR_LOCUS (DECL_ASSEMBLER_NAME (newdecl)) != current_class_type)
3135 cp_error ("conflicting types for `%#D'", newdecl);
3136 cp_error_at ("previous declaration as `%#D'", olddecl);
3139 else if (TREE_CODE (newdecl) == FUNCTION_DECL
3140 && ((DECL_TEMPLATE_SPECIALIZATION (olddecl)
3141 && (!DECL_TEMPLATE_INFO (newdecl)
3142 || (DECL_TI_TEMPLATE (newdecl)
3143 != DECL_TI_TEMPLATE (olddecl))))
3144 || (DECL_TEMPLATE_SPECIALIZATION (newdecl)
3145 && (!DECL_TEMPLATE_INFO (olddecl)
3146 || (DECL_TI_TEMPLATE (olddecl)
3147 != DECL_TI_TEMPLATE (newdecl))))))
3148 /* It's OK to have a template specialization and a non-template
3149 with the same type, or to have specializations of two
3150 different templates with the same type. Note that if one is a
3151 specialization, and the other is an instantiation of the same
3152 template, that we do not exit at this point. That situation
3153 can occur if we instantiate a template class, and then
3154 specialize one of its methods. This situation is legal, but
3155 the declarations must be merged in the usual way. */
3157 else if (TREE_CODE (newdecl) == FUNCTION_DECL
3158 && ((DECL_TEMPLATE_INSTANTIATION (olddecl)
3159 && !DECL_USE_TEMPLATE (newdecl))
3160 || (DECL_TEMPLATE_INSTANTIATION (newdecl)
3161 && !DECL_USE_TEMPLATE (olddecl))))
3162 /* One of the declarations is a template instantiation, and the
3163 other is not a template at all. That's OK. */
3165 else if (TREE_CODE (newdecl) == NAMESPACE_DECL
3166 && DECL_NAMESPACE_ALIAS (newdecl)
3167 && DECL_NAMESPACE_ALIAS (newdecl) == DECL_NAMESPACE_ALIAS (olddecl))
3168 /* Redeclaration of namespace alias, ignore it. */
3172 const char *errmsg = redeclaration_error_message (newdecl, olddecl);
3175 cp_error (errmsg, newdecl);
3176 if (DECL_NAME (olddecl) != NULL_TREE)
3177 cp_error_at ((DECL_INITIAL (olddecl)
3178 && namespace_bindings_p ())
3179 ? "`%#D' previously defined here"
3180 : "`%#D' previously declared here", olddecl);
3182 else if (TREE_CODE (olddecl) == FUNCTION_DECL
3183 && DECL_INITIAL (olddecl) != NULL_TREE
3184 && TYPE_ARG_TYPES (TREE_TYPE (olddecl)) == NULL_TREE
3185 && TYPE_ARG_TYPES (TREE_TYPE (newdecl)) != NULL_TREE)
3187 /* Prototype decl follows defn w/o prototype. */
3188 cp_warning_at ("prototype for `%#D'", newdecl);
3189 cp_warning_at ("follows non-prototype definition here", olddecl);
3191 else if (TREE_CODE (olddecl) == FUNCTION_DECL
3192 && DECL_LANGUAGE (newdecl) != DECL_LANGUAGE (olddecl))
3194 /* extern "C" int foo ();
3195 int foo () { bar (); }
3197 if (current_lang_stack
3198 == &VARRAY_TREE (current_lang_base, 0))
3199 DECL_LANGUAGE (newdecl) = DECL_LANGUAGE (olddecl);
3202 cp_error_at ("previous declaration of `%#D' with %L linkage",
3203 olddecl, DECL_LANGUAGE (olddecl));
3204 cp_error ("conflicts with new declaration with %L linkage",
3205 DECL_LANGUAGE (newdecl));
3209 if (DECL_LANG_SPECIFIC (olddecl) && DECL_USE_TEMPLATE (olddecl))
3211 else if (TREE_CODE (olddecl) == FUNCTION_DECL)
3213 tree t1 = TYPE_ARG_TYPES (TREE_TYPE (olddecl));
3214 tree t2 = TYPE_ARG_TYPES (TREE_TYPE (newdecl));
3217 if (TREE_CODE (TREE_TYPE (newdecl)) == METHOD_TYPE)
3218 t1 = TREE_CHAIN (t1), t2 = TREE_CHAIN (t2);
3220 for (; t1 && t1 != void_list_node;
3221 t1 = TREE_CHAIN (t1), t2 = TREE_CHAIN (t2), i++)
3222 if (TREE_PURPOSE (t1) && TREE_PURPOSE (t2))
3224 if (1 == simple_cst_equal (TREE_PURPOSE (t1),
3229 cp_pedwarn ("default argument given for parameter %d of `%#D'",
3231 cp_pedwarn_at ("after previous specification in `%#D'",
3237 cp_error ("default argument given for parameter %d of `%#D'",
3239 cp_error_at ("after previous specification in `%#D'",
3244 if (DECL_THIS_INLINE (newdecl) && ! DECL_THIS_INLINE (olddecl)
3245 && TREE_ADDRESSABLE (olddecl) && warn_inline)
3247 cp_warning ("`%#D' was used before it was declared inline",
3249 cp_warning_at ("previous non-inline declaration here",
3255 /* If new decl is `static' and an `extern' was seen previously,
3257 warn_extern_redeclared_static (newdecl, olddecl);
3259 /* We have committed to returning 1 at this point. */
3260 if (TREE_CODE (newdecl) == FUNCTION_DECL)
3262 /* Now that functions must hold information normally held
3263 by field decls, there is extra work to do so that
3264 declaration information does not get destroyed during
3266 if (DECL_VINDEX (olddecl))
3267 DECL_VINDEX (newdecl) = DECL_VINDEX (olddecl);
3268 if (DECL_CONTEXT (olddecl))
3269 DECL_CONTEXT (newdecl) = DECL_CONTEXT (olddecl);
3270 if (DECL_CLASS_CONTEXT (olddecl))
3271 DECL_CLASS_CONTEXT (newdecl) = DECL_CLASS_CONTEXT (olddecl);
3272 if (DECL_PENDING_INLINE_INFO (newdecl) == (struct pending_inline *)0)
3273 DECL_PENDING_INLINE_INFO (newdecl) = DECL_PENDING_INLINE_INFO (olddecl);
3274 DECL_STATIC_CONSTRUCTOR (newdecl) |= DECL_STATIC_CONSTRUCTOR (olddecl);
3275 DECL_STATIC_DESTRUCTOR (newdecl) |= DECL_STATIC_DESTRUCTOR (olddecl);
3276 DECL_ABSTRACT_VIRTUAL_P (newdecl) |= DECL_ABSTRACT_VIRTUAL_P (olddecl);
3277 DECL_VIRTUAL_P (newdecl) |= DECL_VIRTUAL_P (olddecl);
3278 DECL_NEEDS_FINAL_OVERRIDER_P (newdecl) |= DECL_NEEDS_FINAL_OVERRIDER_P (olddecl);
3279 DECL_THIS_STATIC (newdecl) |= DECL_THIS_STATIC (olddecl);
3280 new_defines_function = DECL_INITIAL (newdecl) != NULL_TREE;
3282 /* Optionally warn about more than one declaration for the same
3283 name, but don't warn about a function declaration followed by a
3285 if (warn_redundant_decls && ! DECL_ARTIFICIAL (olddecl)
3286 && !(new_defines_function && DECL_INITIAL (olddecl) == NULL_TREE)
3287 /* Don't warn about extern decl followed by definition. */
3288 && !(DECL_EXTERNAL (olddecl) && ! DECL_EXTERNAL (newdecl))
3289 /* Don't warn about friends, let add_friend take care of it. */
3290 && ! DECL_FRIEND_P (newdecl))
3292 cp_warning ("redundant redeclaration of `%D' in same scope", newdecl);
3293 cp_warning_at ("previous declaration of `%D'", olddecl);
3297 /* Deal with C++: must preserve virtual function table size. */
3298 if (TREE_CODE (olddecl) == TYPE_DECL)
3300 register tree newtype = TREE_TYPE (newdecl);
3301 register tree oldtype = TREE_TYPE (olddecl);
3303 if (newtype != error_mark_node && oldtype != error_mark_node
3304 && TYPE_LANG_SPECIFIC (newtype) && TYPE_LANG_SPECIFIC (oldtype))
3306 CLASSTYPE_VSIZE (newtype) = CLASSTYPE_VSIZE (oldtype);
3307 CLASSTYPE_FRIEND_CLASSES (newtype)
3308 = CLASSTYPE_FRIEND_CLASSES (oldtype);
3312 /* Copy all the DECL_... slots specified in the new decl
3313 except for any that we copy here from the old type. */
3314 DECL_MACHINE_ATTRIBUTES (newdecl)
3315 = merge_machine_decl_attributes (olddecl, newdecl);
3317 if (TREE_CODE (newdecl) == TEMPLATE_DECL)
3319 if (! duplicate_decls (DECL_TEMPLATE_RESULT (newdecl),
3320 DECL_TEMPLATE_RESULT (olddecl)))
3321 cp_error ("invalid redeclaration of %D", newdecl);
3322 TREE_TYPE (olddecl) = TREE_TYPE (DECL_TEMPLATE_RESULT (olddecl));
3323 DECL_TEMPLATE_SPECIALIZATIONS (olddecl)
3324 = chainon (DECL_TEMPLATE_SPECIALIZATIONS (olddecl),
3325 DECL_TEMPLATE_SPECIALIZATIONS (newdecl));
3332 /* Automatically handles default parameters. */
3333 tree oldtype = TREE_TYPE (olddecl);
3336 /* Make sure we put the new type in the same obstack as the old one. */
3338 push_obstacks (TYPE_OBSTACK (oldtype), TYPE_OBSTACK (oldtype));
3340 push_permanent_obstack ();
3342 /* Merge the data types specified in the two decls. */
3343 newtype = common_type (TREE_TYPE (newdecl), TREE_TYPE (olddecl));
3345 if (TREE_CODE (newdecl) == VAR_DECL)
3346 DECL_THIS_EXTERN (newdecl) |= DECL_THIS_EXTERN (olddecl);
3347 /* Do this after calling `common_type' so that default
3348 parameters don't confuse us. */
3349 else if (TREE_CODE (newdecl) == FUNCTION_DECL
3350 && (TYPE_RAISES_EXCEPTIONS (TREE_TYPE (newdecl))
3351 != TYPE_RAISES_EXCEPTIONS (TREE_TYPE (olddecl))))
3353 TREE_TYPE (newdecl) = build_exception_variant (newtype,
3354 TYPE_RAISES_EXCEPTIONS (TREE_TYPE (newdecl)));
3355 TREE_TYPE (olddecl) = build_exception_variant (newtype,
3356 TYPE_RAISES_EXCEPTIONS (oldtype));
3358 if ((pedantic || ! DECL_IN_SYSTEM_HEADER (olddecl))
3359 && DECL_SOURCE_LINE (olddecl) != 0
3361 && !comp_except_specs (TYPE_RAISES_EXCEPTIONS (TREE_TYPE (newdecl)),
3362 TYPE_RAISES_EXCEPTIONS (TREE_TYPE (olddecl)), 1))
3364 cp_error ("declaration of `%F' throws different exceptions",
3366 cp_error_at ("to previous declaration `%F'", olddecl);
3369 TREE_TYPE (newdecl) = TREE_TYPE (olddecl) = newtype;
3371 /* Lay the type out, unless already done. */
3372 if (! same_type_p (newtype, oldtype)
3373 && TREE_TYPE (newdecl) != error_mark_node
3374 && !(processing_template_decl && uses_template_parms (newdecl)))
3375 layout_type (TREE_TYPE (newdecl));
3377 if ((TREE_CODE (newdecl) == VAR_DECL
3378 || TREE_CODE (newdecl) == PARM_DECL
3379 || TREE_CODE (newdecl) == RESULT_DECL
3380 || TREE_CODE (newdecl) == FIELD_DECL
3381 || TREE_CODE (newdecl) == TYPE_DECL)
3382 && !(processing_template_decl && uses_template_parms (newdecl)))
3383 layout_decl (newdecl, 0);
3385 /* Merge the type qualifiers. */
3386 if (TREE_READONLY (newdecl))
3387 TREE_READONLY (olddecl) = 1;
3388 if (TREE_THIS_VOLATILE (newdecl))
3389 TREE_THIS_VOLATILE (olddecl) = 1;
3391 /* Merge the initialization information. */
3392 if (DECL_INITIAL (newdecl) == NULL_TREE
3393 && DECL_INITIAL (olddecl) != NULL_TREE)
3395 DECL_INITIAL (newdecl) = DECL_INITIAL (olddecl);
3396 DECL_SOURCE_FILE (newdecl) = DECL_SOURCE_FILE (olddecl);
3397 DECL_SOURCE_LINE (newdecl) = DECL_SOURCE_LINE (olddecl);
3398 if (CAN_HAVE_FULL_LANG_DECL_P (newdecl)
3399 && DECL_LANG_SPECIFIC (newdecl)
3400 && DECL_LANG_SPECIFIC (olddecl))
3401 DECL_SAVED_TREE (newdecl) = DECL_SAVED_TREE (olddecl);
3404 /* Merge the section attribute.
3405 We want to issue an error if the sections conflict but that must be
3406 done later in decl_attributes since we are called before attributes
3408 if (DECL_SECTION_NAME (newdecl) == NULL_TREE)
3409 DECL_SECTION_NAME (newdecl) = DECL_SECTION_NAME (olddecl);
3411 /* Keep the old rtl since we can safely use it. */
3412 DECL_RTL (newdecl) = DECL_RTL (olddecl);
3416 /* If cannot merge, then use the new type and qualifiers,
3417 and don't preserve the old rtl. */
3420 /* Clean out any memory we had of the old declaration. */
3421 tree oldstatic = value_member (olddecl, static_aggregates);
3423 TREE_VALUE (oldstatic) = error_mark_node;
3425 TREE_TYPE (olddecl) = TREE_TYPE (newdecl);
3426 TREE_READONLY (olddecl) = TREE_READONLY (newdecl);
3427 TREE_THIS_VOLATILE (olddecl) = TREE_THIS_VOLATILE (newdecl);
3428 TREE_SIDE_EFFECTS (olddecl) = TREE_SIDE_EFFECTS (newdecl);
3431 /* Merge the storage class information. */
3432 DECL_WEAK (newdecl) |= DECL_WEAK (olddecl);
3433 DECL_ONE_ONLY (newdecl) |= DECL_ONE_ONLY (olddecl);
3434 TREE_PUBLIC (newdecl) = TREE_PUBLIC (olddecl);
3435 TREE_STATIC (olddecl) = TREE_STATIC (newdecl) |= TREE_STATIC (olddecl);
3436 if (! DECL_EXTERNAL (olddecl))
3437 DECL_EXTERNAL (newdecl) = 0;
3439 if (DECL_LANG_SPECIFIC (newdecl) && DECL_LANG_SPECIFIC (olddecl))
3441 DECL_INTERFACE_KNOWN (newdecl) |= DECL_INTERFACE_KNOWN (olddecl);
3442 DECL_NOT_REALLY_EXTERN (newdecl) |= DECL_NOT_REALLY_EXTERN (olddecl);
3443 DECL_COMDAT (newdecl) |= DECL_COMDAT (olddecl);
3444 DECL_TEMPLATE_INSTANTIATED (newdecl)
3445 |= DECL_TEMPLATE_INSTANTIATED (olddecl);
3446 /* Don't really know how much of the language-specific
3447 values we should copy from old to new. */
3448 DECL_IN_AGGR_P (newdecl) = DECL_IN_AGGR_P (olddecl);
3449 DECL_ACCESS (newdecl) = DECL_ACCESS (olddecl);
3450 DECL_NONCONVERTING_P (newdecl) = DECL_NONCONVERTING_P (olddecl);
3451 DECL_TEMPLATE_INFO (newdecl) = DECL_TEMPLATE_INFO (olddecl);
3452 olddecl_friend = DECL_FRIEND_P (olddecl);
3454 /* Only functions have DECL_BEFRIENDING_CLASSES. */
3455 if (TREE_CODE (newdecl) == FUNCTION_DECL
3456 || DECL_FUNCTION_TEMPLATE_P (newdecl))
3457 DECL_BEFRIENDING_CLASSES (newdecl)
3458 = chainon (DECL_BEFRIENDING_CLASSES (newdecl),
3459 DECL_BEFRIENDING_CLASSES (olddecl));
3462 if (TREE_CODE (newdecl) == FUNCTION_DECL)
3464 if (DECL_TEMPLATE_INSTANTIATION (olddecl)
3465 && !DECL_TEMPLATE_INSTANTIATION (newdecl))
3467 /* If newdecl is not a specialization, then it is not a
3468 template-related function at all. And that means that we
3469 shoud have exited above, returning 0. */
3470 my_friendly_assert (DECL_TEMPLATE_SPECIALIZATION (newdecl),
3473 if (TREE_USED (olddecl))
3474 /* From [temp.expl.spec]:
3476 If a template, a member template or the member of a class
3477 template is explicitly specialized then that
3478 specialization shall be declared before the first use of
3479 that specialization that would cause an implicit
3480 instantiation to take place, in every translation unit in
3481 which such a use occurs. */
3482 cp_error ("explicit specialization of %D after first use",
3485 SET_DECL_TEMPLATE_SPECIALIZATION (olddecl);
3487 DECL_THIS_INLINE (newdecl) |= DECL_THIS_INLINE (olddecl);
3489 /* If either decl says `inline', this fn is inline, unless its
3490 definition was passed already. */
3491 if (DECL_INLINE (newdecl) && DECL_INITIAL (olddecl) == NULL_TREE)
3492 DECL_INLINE (olddecl) = 1;
3493 DECL_INLINE (newdecl) = DECL_INLINE (olddecl);
3497 DECL_LANGUAGE (olddecl) = DECL_LANGUAGE (newdecl);
3498 DECL_ASSEMBLER_NAME (olddecl) = DECL_ASSEMBLER_NAME (newdecl);
3499 DECL_RTL (olddecl) = DECL_RTL (newdecl);
3501 if (! types_match || new_defines_function)
3503 /* These need to be copied so that the names are available.
3504 Note that if the types do match, we'll preserve inline
3505 info and other bits, but if not, we won't. */
3506 DECL_ARGUMENTS (olddecl) = DECL_ARGUMENTS (newdecl);
3507 DECL_RESULT (olddecl) = DECL_RESULT (newdecl);
3509 if (new_defines_function)
3510 /* If defining a function declared with other language
3511 linkage, use the previously declared language linkage. */
3512 DECL_LANGUAGE (newdecl) = DECL_LANGUAGE (olddecl);
3513 else if (types_match)
3515 /* If redeclaring a builtin function, and not a definition,
3516 it stays built in. */
3517 if (DECL_BUILT_IN (olddecl))
3519 DECL_BUILT_IN_CLASS (newdecl) = DECL_BUILT_IN_CLASS (olddecl);
3520 DECL_FUNCTION_CODE (newdecl) = DECL_FUNCTION_CODE (olddecl);
3521 /* If we're keeping the built-in definition, keep the rtl,
3522 regardless of declaration matches. */
3523 DECL_RTL (newdecl) = DECL_RTL (olddecl);
3526 DECL_FRAME_SIZE (newdecl) = DECL_FRAME_SIZE (olddecl);
3528 DECL_RESULT (newdecl) = DECL_RESULT (olddecl);
3529 if ((DECL_SAVED_INSNS (newdecl) = DECL_SAVED_INSNS (olddecl)))
3530 /* Previously saved insns go together with
3531 the function's previous definition. */
3532 DECL_INITIAL (newdecl) = DECL_INITIAL (olddecl);
3533 /* Don't clear out the arguments if we're redefining a function. */
3534 if (DECL_ARGUMENTS (olddecl))
3535 DECL_ARGUMENTS (newdecl) = DECL_ARGUMENTS (olddecl);
3537 if (DECL_LANG_SPECIFIC (olddecl))
3538 DECL_MAIN_VARIANT (newdecl) = DECL_MAIN_VARIANT (olddecl);
3541 if (TREE_CODE (newdecl) == NAMESPACE_DECL)
3543 NAMESPACE_LEVEL (newdecl) = NAMESPACE_LEVEL (olddecl);
3546 /* Now preserve various other info from the definition. */
3547 TREE_ADDRESSABLE (newdecl) = TREE_ADDRESSABLE (olddecl);
3548 TREE_ASM_WRITTEN (newdecl) = TREE_ASM_WRITTEN (olddecl);
3549 DECL_COMMON (newdecl) = DECL_COMMON (olddecl);
3550 DECL_ASSEMBLER_NAME (newdecl) = DECL_ASSEMBLER_NAME (olddecl);
3552 if (TREE_CODE (newdecl) == FUNCTION_DECL)
3556 function_size = sizeof (struct tree_decl);
3558 bcopy ((char *) newdecl + sizeof (struct tree_common),
3559 (char *) olddecl + sizeof (struct tree_common),
3560 function_size - sizeof (struct tree_common));
3562 if (DECL_TEMPLATE_INSTANTIATION (newdecl))
3564 /* If newdecl is a template instantiation, it is possible that
3565 the following sequence of events has occurred:
3567 o A friend function was declared in a class template. The
3568 class template was instantiated.
3570 o The instantiation of the friend declaration was
3571 recorded on the instantiation list, and is newdecl.
3573 o Later, however, instantiate_class_template called pushdecl
3574 on the newdecl to perform name injection. But, pushdecl in
3575 turn called duplicate_decls when it discovered that another
3576 declaration of a global function with the same name already
3579 o Here, in duplicate_decls, we decided to clobber newdecl.
3581 If we're going to do that, we'd better make sure that
3582 olddecl, and not newdecl, is on the list of
3583 instantiations so that if we try to do the instantiation
3584 again we won't get the clobbered declaration. */
3586 tree tmpl = DECL_TI_TEMPLATE (newdecl);
3587 tree decls = DECL_TEMPLATE_SPECIALIZATIONS (tmpl);
3589 for (; decls; decls = TREE_CHAIN (decls))
3590 if (TREE_VALUE (decls) == newdecl)
3591 TREE_VALUE (decls) = olddecl;
3596 bcopy ((char *) newdecl + sizeof (struct tree_common),
3597 (char *) olddecl + sizeof (struct tree_common),
3598 sizeof (struct tree_decl) - sizeof (struct tree_common)
3599 + tree_code_length [(int)TREE_CODE (newdecl)] * sizeof (char *));
3602 DECL_UID (olddecl) = olddecl_uid;
3604 DECL_FRIEND_P (olddecl) = 1;
3606 /* NEWDECL contains the merged attribute lists.
3607 Update OLDDECL to be the same. */
3608 DECL_MACHINE_ATTRIBUTES (olddecl) = DECL_MACHINE_ATTRIBUTES (newdecl);
3613 /* Record a decl-node X as belonging to the current lexical scope.
3614 Check for errors (such as an incompatible declaration for the same
3615 name already seen in the same scope).
3617 Returns either X or an old decl for the same name.
3618 If an old decl is returned, it may have been smashed
3619 to agree with what X says. */
3627 int need_new_binding;
3629 /* We shouldn't be calling pushdecl when we're generating RTL for a
3630 function that we already did semantic analysis on previously. */
3631 my_friendly_assert (!current_function || doing_semantic_analysis_p (),
3634 name = DECL_ASSEMBLER_NAME (x);
3635 need_new_binding = 1;
3637 if (DECL_TEMPLATE_PARM_P (x))
3638 /* Template parameters have no context; they are not X::T even
3639 when declared within a class or namespace. */
3643 if (current_function_decl && x != current_function_decl
3644 /* A local declaration for a function doesn't constitute
3646 && !(TREE_CODE (x) == FUNCTION_DECL && !DECL_INITIAL (x))
3647 /* A local declaration for an `extern' variable is in the
3648 scoped of the current namespace, not the current
3650 && !(TREE_CODE (x) == VAR_DECL && DECL_EXTERNAL (x))
3651 /* Don't change DECL_CONTEXT of virtual methods. */
3652 && (TREE_CODE (x) != FUNCTION_DECL || !DECL_VIRTUAL_P (x))
3653 && !DECL_CONTEXT (x))
3654 DECL_CONTEXT (x) = current_function_decl;
3655 if (!DECL_CONTEXT (x))
3656 DECL_CONTEXT (x) = FROB_CONTEXT (current_namespace);
3659 /* Type are looked up using the DECL_NAME, as that is what the rest of the
3660 compiler wants to use. */
3661 if (TREE_CODE (x) == TYPE_DECL || TREE_CODE (x) == VAR_DECL
3662 || TREE_CODE (x) == NAMESPACE_DECL)
3663 name = DECL_NAME (x);
3668 /* Not needed...see below. */
3672 if (TREE_CODE (name) == TEMPLATE_ID_EXPR)
3673 name = TREE_OPERAND (name, 0);
3675 /* Namespace-scoped variables are not found in the current level. */
3676 if (TREE_CODE (x) == VAR_DECL && DECL_NAMESPACE_SCOPE_P (x))
3677 t = namespace_binding (name, DECL_CONTEXT (x));
3679 t = lookup_name_current_level (name);
3680 if (t == error_mark_node)
3682 /* error_mark_node is 0 for a while during initialization! */
3684 cp_error_at ("`%#D' used prior to declaration", x);
3687 else if (t != NULL_TREE)
3690 /* This is turned off until I have time to do it right (bpk). */
3691 /* With the code below that uses it... */
3692 file = DECL_SOURCE_FILE (t);
3693 line = DECL_SOURCE_LINE (t);
3695 if (TREE_CODE (t) == PARM_DECL)
3697 if (DECL_CONTEXT (t) == NULL_TREE)
3698 fatal ("parse errors have confused me too much");
3700 /* Check for duplicate params. */
3701 if (duplicate_decls (x, t))
3704 else if (((TREE_CODE (x) == FUNCTION_DECL && DECL_LANGUAGE (x) == lang_c)
3705 || DECL_FUNCTION_TEMPLATE_P (x))
3706 && is_overloaded_fn (t))
3707 /* Don't do anything just yet. */;
3708 else if (t == wchar_decl_node)
3710 if (pedantic && ! DECL_IN_SYSTEM_HEADER (x))
3711 cp_pedwarn ("redeclaration of wchar_t as `%T'", TREE_TYPE (x));
3713 /* Throw away the redeclaration. */
3716 else if (TREE_CODE (t) != TREE_CODE (x))
3718 if (duplicate_decls (x, t))
3721 else if (duplicate_decls (x, t))
3724 /* This is turned off until I have time to do it right (bpk). */
3726 /* Also warn if they did a prototype with `static' on it, but
3727 then later left the `static' off. */
3728 if (! TREE_PUBLIC (name) && TREE_PUBLIC (x))
3730 if (DECL_LANG_SPECIFIC (t) && DECL_FRIEND_P (t))
3735 cp_warning ("`static' missing from declaration of `%D'",
3737 warning_with_file_and_line (file, line,
3738 "previous declaration of `%s'",
3739 decl_as_string (t, 0));
3742 /* Now fix things so it'll do what they expect. */
3743 if (current_function_decl)
3744 TREE_PUBLIC (current_function_decl) = 0;
3746 /* Due to interference in memory reclamation (X may be
3747 obstack-deallocated at this point), we must guard against
3748 one really special case. [jason: This should be handled
3749 by start_function] */
3750 if (current_function_decl == x)
3751 current_function_decl = t;
3753 if (TREE_CODE (t) == TYPE_DECL)
3754 SET_IDENTIFIER_TYPE_VALUE (name, TREE_TYPE (t));
3755 else if (TREE_CODE (t) == FUNCTION_DECL)
3756 check_default_args (t);
3760 else if (DECL_MAIN_P (x))
3762 /* A redeclaration of main, but not a duplicate of the
3767 This function shall not be overloaded. */
3768 cp_error_at ("invalid redeclaration of `%D'", t);
3769 cp_error ("as `%D'", x);
3770 /* We don't try to push this declaration since that
3776 check_template_shadow (x);
3778 /* If this is a function conjured up by the backend, massage it
3779 so it looks friendly. */
3780 if (TREE_CODE (x) == FUNCTION_DECL
3781 && ! DECL_LANG_SPECIFIC (x))
3783 retrofit_lang_decl (x);
3784 DECL_LANGUAGE (x) = lang_c;
3787 if (TREE_CODE (x) == FUNCTION_DECL && ! DECL_FUNCTION_MEMBER_P (x))
3789 t = push_overloaded_decl (x, PUSH_LOCAL);
3792 if (!namespace_bindings_p ())
3793 /* We do not need to create a binding for this name;
3794 push_overloaded_decl will have already done so if
3796 need_new_binding = 0;
3798 else if (DECL_FUNCTION_TEMPLATE_P (x) && DECL_NAMESPACE_SCOPE_P (x))
3800 t = push_overloaded_decl (x, PUSH_GLOBAL);
3802 add_decl_to_level (x, NAMESPACE_LEVEL (CP_DECL_CONTEXT (t)));
3806 /* If declaring a type as a typedef, copy the type (unless we're
3807 at line 0), and install this TYPE_DECL as the new type's typedef
3808 name. See the extensive comment in ../c-decl.c (pushdecl). */
3809 if (TREE_CODE (x) == TYPE_DECL)
3811 tree type = TREE_TYPE (x);
3812 if (DECL_SOURCE_LINE (x) == 0)
3814 if (TYPE_NAME (type) == 0)
3815 TYPE_NAME (type) = x;
3817 else if (type != error_mark_node && TYPE_NAME (type) != x
3818 /* We don't want to copy the type when all we're
3819 doing is making a TYPE_DECL for the purposes of
3821 && (!TYPE_NAME (type)
3822 || TYPE_NAME (type) != DECL_ABSTRACT_ORIGIN (x)))
3824 push_obstacks (TYPE_OBSTACK (type), TYPE_OBSTACK (type));
3826 DECL_ORIGINAL_TYPE (x) = type;
3827 type = build_type_copy (type);
3828 TYPE_STUB_DECL (type) = TYPE_STUB_DECL (DECL_ORIGINAL_TYPE (x));
3829 TYPE_NAME (type) = x;
3830 TREE_TYPE (x) = type;
3835 if (type != error_mark_node
3837 && TYPE_IDENTIFIER (type))
3838 set_identifier_type_value_with_scope (DECL_NAME (x), type,
3839 current_binding_level);
3843 /* Multiple external decls of the same identifier ought to match.
3845 We get warnings about inline functions where they are defined.
3846 We get warnings about other functions from push_overloaded_decl.
3848 Avoid duplicate warnings where they are used. */
3849 if (TREE_PUBLIC (x) && TREE_CODE (x) != FUNCTION_DECL)
3853 if (IDENTIFIER_NAMESPACE_VALUE (name) != NULL_TREE
3854 && (DECL_EXTERNAL (IDENTIFIER_NAMESPACE_VALUE (name))
3855 || TREE_PUBLIC (IDENTIFIER_NAMESPACE_VALUE (name))))
3856 decl = IDENTIFIER_NAMESPACE_VALUE (name);
3861 /* If different sort of thing, we already gave an error. */
3862 && TREE_CODE (decl) == TREE_CODE (x)
3863 && !same_type_p (TREE_TYPE (x), TREE_TYPE (decl)))
3865 cp_pedwarn ("type mismatch with previous external decl", x);
3866 cp_pedwarn_at ("previous external decl of `%#D'", decl);
3870 /* This name is new in its binding level.
3871 Install the new declaration and return it. */
3872 if (namespace_bindings_p ())
3874 /* Install a global value. */
3876 /* If the first global decl has external linkage,
3877 warn if we later see static one. */
3878 if (IDENTIFIER_GLOBAL_VALUE (name) == NULL_TREE && TREE_PUBLIC (x))
3879 TREE_PUBLIC (name) = 1;
3881 if (!(TREE_CODE (x) == TYPE_DECL && DECL_ARTIFICIAL (x)
3883 /* For an ordinary function, we create a binding from
3884 the mangled name (i.e., NAME) to the DECL. But, for
3885 an `extern "C"' function, the mangled name and the
3886 ordinary name are the same so we need not do this. */
3887 && !(TREE_CODE (x) == FUNCTION_DECL &&
3888 DECL_LANGUAGE (x) == lang_c))
3890 if (TREE_CODE (x) == FUNCTION_DECL)
3892 ((IDENTIFIER_GLOBAL_VALUE (name) == NULL_TREE)
3893 || (IDENTIFIER_GLOBAL_VALUE (name) == x), 378);
3894 SET_IDENTIFIER_NAMESPACE_VALUE (name, x);
3897 /* Don't forget if the function was used via an implicit decl. */
3898 if (IDENTIFIER_IMPLICIT_DECL (name)
3899 && TREE_USED (IDENTIFIER_IMPLICIT_DECL (name)))
3902 /* Don't forget if its address was taken in that way. */
3903 if (IDENTIFIER_IMPLICIT_DECL (name)
3904 && TREE_ADDRESSABLE (IDENTIFIER_IMPLICIT_DECL (name)))
3905 TREE_ADDRESSABLE (x) = 1;
3907 /* Warn about mismatches against previous implicit decl. */
3908 if (IDENTIFIER_IMPLICIT_DECL (name) != NULL_TREE
3909 /* If this real decl matches the implicit, don't complain. */
3910 && ! (TREE_CODE (x) == FUNCTION_DECL
3911 && TREE_TYPE (TREE_TYPE (x)) == integer_type_node))
3913 ("`%D' was previously implicitly declared to return `int'", x);
3915 /* If new decl is `static' and an `extern' was seen previously,
3917 if (x != NULL_TREE && t != NULL_TREE && decls_match (x, t))
3918 warn_extern_redeclared_static (x, t);
3922 /* Here to install a non-global value. */
3923 tree oldlocal = IDENTIFIER_VALUE (name);
3924 tree oldglobal = IDENTIFIER_NAMESPACE_VALUE (name);
3926 if (need_new_binding)
3928 push_local_binding (name, x, 0);
3929 /* Because push_local_binding will hook X on to the
3930 current_binding_level's name list, we don't want to
3931 do that again below. */
3932 need_new_binding = 0;
3935 /* If this is a TYPE_DECL, push it into the type value slot. */
3936 if (TREE_CODE (x) == TYPE_DECL)
3937 set_identifier_type_value_with_scope (name, TREE_TYPE (x),
3938 current_binding_level);
3940 /* Clear out any TYPE_DECL shadowed by a namespace so that
3941 we won't think this is a type. The C struct hack doesn't
3942 go through namespaces. */
3943 if (TREE_CODE (x) == NAMESPACE_DECL)
3944 set_identifier_type_value_with_scope (name, NULL_TREE,
3945 current_binding_level);
3947 /* If this is an extern function declaration, see if we
3948 have a global definition or declaration for the function. */
3949 if (oldlocal == NULL_TREE
3950 && DECL_EXTERNAL (x)
3951 && oldglobal != NULL_TREE
3952 && TREE_CODE (x) == FUNCTION_DECL
3953 && TREE_CODE (oldglobal) == FUNCTION_DECL)
3955 /* We have one. Their types must agree. */
3956 if (decls_match (x, oldglobal))
3960 cp_warning ("extern declaration of `%#D' doesn't match", x);
3961 cp_warning_at ("global declaration `%#D'", oldglobal);
3964 /* If we have a local external declaration,
3965 and no file-scope declaration has yet been seen,
3966 then if we later have a file-scope decl it must not be static. */
3967 if (oldlocal == NULL_TREE
3968 && oldglobal == NULL_TREE
3969 && DECL_EXTERNAL (x)
3971 TREE_PUBLIC (name) = 1;
3973 if (DECL_FROM_INLINE (x))
3974 /* Inline decls shadow nothing. */;
3976 /* Warn if shadowing an argument at the top level of the body. */
3977 else if (oldlocal != NULL_TREE && !DECL_EXTERNAL (x)
3978 && TREE_CODE (oldlocal) == PARM_DECL
3979 /* Don't complain if it's from an enclosing function. */
3980 && DECL_CONTEXT (oldlocal) == current_function_decl
3981 && TREE_CODE (x) != PARM_DECL)
3983 /* Go to where the parms should be and see if we
3985 struct binding_level *b = current_binding_level->level_chain;
3991 if (b->parm_flag == 1)
3992 cp_error ("declaration of `%#D' shadows a parameter", name);
3994 else if (warn_shadow && oldlocal != NULL_TREE
3995 && current_binding_level->is_for_scope
3996 && !DECL_DEAD_FOR_LOCAL (oldlocal))
3998 warning ("variable `%s' shadows local",
3999 IDENTIFIER_POINTER (name));
4000 cp_warning_at (" this is the shadowed declaration", oldlocal);
4002 /* Maybe warn if shadowing something else. */
4003 else if (warn_shadow && !DECL_EXTERNAL (x)
4004 /* No shadow warnings for internally generated vars. */
4005 && ! DECL_ARTIFICIAL (x)
4006 /* No shadow warnings for vars made for inlining. */
4007 && ! DECL_FROM_INLINE (x))
4009 const char *warnstring = NULL;
4011 if (oldlocal != NULL_TREE && TREE_CODE (oldlocal) == PARM_DECL)
4012 warnstring = "declaration of `%s' shadows a parameter";
4013 else if (IDENTIFIER_CLASS_VALUE (name) != NULL_TREE
4014 && current_class_ptr
4015 && !TREE_STATIC (name))
4016 warnstring = "declaration of `%s' shadows a member of `this'";
4017 else if (oldlocal != NULL_TREE)
4018 warnstring = "declaration of `%s' shadows previous local";
4019 else if (oldglobal != NULL_TREE)
4020 /* XXX shadow warnings in outer-more namespaces */
4021 warnstring = "declaration of `%s' shadows global declaration";
4024 warning (warnstring, IDENTIFIER_POINTER (name));
4028 if (TREE_CODE (x) == FUNCTION_DECL)
4029 check_default_args (x);
4031 /* Keep count of variables in this level with incomplete type. */
4032 if (TREE_CODE (x) == VAR_DECL
4033 && TREE_TYPE (x) != error_mark_node
4034 && ((TYPE_SIZE (TREE_TYPE (x)) == NULL_TREE
4035 && PROMOTES_TO_AGGR_TYPE (TREE_TYPE (x), ARRAY_TYPE))
4036 /* RTTI TD entries are created while defining the type_info. */
4037 || (TYPE_LANG_SPECIFIC (TREE_TYPE (x))
4038 && TYPE_BEING_DEFINED (TREE_TYPE (x)))))
4039 current_binding_level->incomplete
4040 = tree_cons (NULL_TREE, x, current_binding_level->incomplete);
4043 if (need_new_binding)
4044 add_decl_to_level (x,
4045 DECL_NAMESPACE_SCOPE_P (x)
4046 ? NAMESPACE_LEVEL (CP_DECL_CONTEXT (x))
4047 : current_binding_level);
4052 /* Same as pushdecl, but define X in binding-level LEVEL. We rely on the
4053 caller to set DECL_CONTEXT properly. */
4056 pushdecl_with_scope (x, level)
4058 struct binding_level *level;
4060 register struct binding_level *b;
4061 tree function_decl = current_function_decl;
4063 current_function_decl = NULL_TREE;
4064 if (level->parm_flag == 2)
4066 b = class_binding_level;
4067 class_binding_level = level;
4068 pushdecl_class_level (x);
4069 class_binding_level = b;
4073 b = current_binding_level;
4074 current_binding_level = level;
4076 current_binding_level = b;
4078 current_function_decl = function_decl;
4082 /* Like pushdecl, only it places X in the current namespace,
4086 pushdecl_namespace_level (x)
4089 register struct binding_level *b = current_binding_level;
4092 t = pushdecl_with_scope (x, NAMESPACE_LEVEL (current_namespace));
4094 /* Now, the type_shadowed stack may screw us. Munge it so it does
4096 if (TREE_CODE (x) == TYPE_DECL)
4098 tree name = DECL_NAME (x);
4100 tree *ptr = (tree *)0;
4101 for (; b != global_binding_level; b = b->level_chain)
4103 tree shadowed = b->type_shadowed;
4104 for (; shadowed; shadowed = TREE_CHAIN (shadowed))
4105 if (TREE_PURPOSE (shadowed) == name)
4107 ptr = &TREE_VALUE (shadowed);
4108 /* Can't break out of the loop here because sometimes
4109 a binding level will have duplicate bindings for
4110 PT names. It's gross, but I haven't time to fix it. */
4113 newval = TREE_TYPE (x);
4114 if (ptr == (tree *)0)
4116 /* @@ This shouldn't be needed. My test case "zstring.cc" trips
4117 up here if this is changed to an assertion. --KR */
4118 SET_IDENTIFIER_TYPE_VALUE (name, newval);
4128 /* Like pushdecl, only it places X in GLOBAL_BINDING_LEVEL,
4132 pushdecl_top_level (x)
4135 push_to_top_level ();
4136 x = pushdecl_namespace_level (x);
4137 pop_from_top_level ();
4141 /* Make the declaration of X appear in CLASS scope. */
4144 pushdecl_class_level (x)
4147 /* Don't use DECL_ASSEMBLER_NAME here! Everything that looks in class
4148 scope looks for the pre-mangled name. */
4151 if (TREE_CODE (x) == OVERLOAD)
4152 x = OVL_CURRENT (x);
4153 name = DECL_NAME (x);
4157 push_class_level_binding (name, x);
4158 if (TREE_CODE (x) == TYPE_DECL)
4159 set_identifier_type_value (name, TREE_TYPE (x));
4161 else if (ANON_AGGR_TYPE_P (TREE_TYPE (x)))
4165 for (f = TYPE_FIELDS (TREE_TYPE (x));
4168 pushdecl_class_level (f);
4172 /* Enter DECL into the symbol table, if that's appropriate. Returns
4173 DECL, or a modified version thereof. */
4176 maybe_push_decl (decl)
4179 tree type = TREE_TYPE (decl);
4181 /* Add this decl to the current binding level, but not if it comes
4182 from another scope, e.g. a static member variable. TEM may equal
4183 DECL or it may be a previous decl of the same name. */
4184 if ((TREE_CODE (decl) != PARM_DECL
4185 && DECL_CONTEXT (decl) != NULL_TREE
4186 /* Definitions of namespace members outside their namespace are
4188 && TREE_CODE (DECL_CONTEXT (decl)) != NAMESPACE_DECL)
4189 || (TREE_CODE (decl) == TEMPLATE_DECL && !namespace_bindings_p ())
4190 || TREE_CODE (type) == UNKNOWN_TYPE
4191 /* The declaration of a template specialization does not affect
4192 the functions available for overload resolution, so we do not
4194 || (TREE_CODE (decl) == FUNCTION_DECL
4195 && DECL_TEMPLATE_SPECIALIZATION (decl)))
4198 return pushdecl (decl);
4202 /* This function is used to push the mangled decls for nested types into
4203 the appropriate scope. Previously pushdecl_top_level was used, but that
4204 is incorrect for members of local classes. */
4207 pushdecl_nonclass_level (x)
4210 struct binding_level *b = current_binding_level;
4212 my_friendly_assert (b->parm_flag != 2, 180);
4215 /* Get out of template binding levels */
4216 while (b->pseudo_global)
4220 pushdecl_with_scope (x, b);
4224 /* Make the declaration(s) of X appear in CLASS scope
4225 under the name NAME. */
4228 push_class_level_binding (name, x)
4233 /* The class_binding_level will be NULL if x is a template
4234 parameter name in a member template. */
4235 if (!class_binding_level)
4238 /* Make sure that this new member does not have the same name
4239 as a template parameter. */
4240 if (TYPE_BEING_DEFINED (current_class_type))
4241 check_template_shadow (x);
4243 /* If this declaration shadows a declaration from an enclosing
4244 class, then we will need to restore IDENTIFIER_CLASS_VALUE when
4245 we leave this class. Record the shadowed declaration here. */
4246 binding = IDENTIFIER_BINDING (name);
4248 && ((TREE_CODE (x) == OVERLOAD
4249 && BINDING_VALUE (binding)
4250 && is_overloaded_fn (BINDING_VALUE (binding)))
4251 || INHERITED_VALUE_BINDING_P (binding)))
4256 /* If the old binding was from a base class, and was for a tag
4257 name, slide it over to make room for the new binding. The
4258 old binding is still visible if explicitly qualified with a
4260 if (INHERITED_VALUE_BINDING_P (binding)
4261 && BINDING_VALUE (binding)
4262 && TREE_CODE (BINDING_VALUE (binding)) == TYPE_DECL
4263 && DECL_ARTIFICIAL (BINDING_VALUE (binding))
4264 && !(TREE_CODE (x) == TYPE_DECL && DECL_ARTIFICIAL (x)))
4266 old_decl = BINDING_TYPE (binding);
4267 BINDING_TYPE (binding) = BINDING_VALUE (binding);
4268 BINDING_VALUE (binding) = NULL_TREE;
4269 INHERITED_VALUE_BINDING_P (binding) = 0;
4272 old_decl = BINDING_VALUE (binding);
4274 /* There was already a binding for X containing fewer
4275 functions than are named in X. Find the previous
4276 declaration of X on the class-shadowed list, and update it. */
4277 for (shadow = class_binding_level->class_shadowed;
4279 shadow = TREE_CHAIN (shadow))
4280 if (TREE_PURPOSE (shadow) == name
4281 && TREE_TYPE (shadow) == old_decl)
4283 BINDING_VALUE (binding) = x;
4284 INHERITED_VALUE_BINDING_P (binding) = 0;
4285 TREE_TYPE (shadow) = x;
4290 /* If we didn't replace an existing binding, put the binding on the
4291 stack of bindings for the identifier, and update
4292 IDENTIFIER_CLASS_VALUE. */
4293 if (push_class_binding (name, x))
4295 class_binding_level->class_shadowed
4296 = tree_cons (name, IDENTIFIER_CLASS_VALUE (name),
4297 class_binding_level->class_shadowed);
4298 /* Record the value we are binding NAME to so that we can know
4299 what to pop later. */
4300 TREE_TYPE (class_binding_level->class_shadowed) = x;
4304 /* Insert another USING_DECL into the current binding level,
4305 returning this declaration. If this is a redeclaration,
4306 do nothing and return NULL_TREE. */
4309 push_using_decl (scope, name)
4315 my_friendly_assert (TREE_CODE (scope) == NAMESPACE_DECL, 383);
4316 my_friendly_assert (TREE_CODE (name) == IDENTIFIER_NODE, 384);
4317 for (decl = current_binding_level->usings; decl; decl = TREE_CHAIN (decl))
4318 if (DECL_INITIAL (decl) == scope && DECL_NAME (decl) == name)
4322 decl = build_lang_decl (USING_DECL, name, void_type_node);
4323 DECL_INITIAL (decl) = scope;
4324 TREE_CHAIN (decl) = current_binding_level->usings;
4325 current_binding_level->usings = decl;
4329 /* Add namespace to using_directives. Return NULL_TREE if nothing was
4330 changed (i.e. there was already a directive), or the fresh
4331 TREE_LIST otherwise. */
4334 push_using_directive (used)
4337 tree ud = current_binding_level->using_directives;
4338 tree iter, ancestor;
4340 /* Check if we already have this. */
4341 if (purpose_member (used, ud) != NULL_TREE)
4344 /* Recursively add all namespaces used. */
4345 for (iter = DECL_NAMESPACE_USING (used); iter; iter = TREE_CHAIN (iter))
4346 push_using_directive (TREE_PURPOSE (iter));
4348 ancestor = namespace_ancestor (current_decl_namespace (), used);
4349 ud = current_binding_level->using_directives;
4350 ud = tree_cons (used, ancestor, ud);
4351 current_binding_level->using_directives = ud;
4355 /* DECL is a FUNCTION_DECL for a non-member function, which may have
4356 other definitions already in place. We get around this by making
4357 the value of the identifier point to a list of all the things that
4358 want to be referenced by that name. It is then up to the users of
4359 that name to decide what to do with that list.
4361 DECL may also be a TEMPLATE_DECL, with a FUNCTION_DECL in its DECL_RESULT
4362 slot. It is dealt with the same way.
4364 FLAGS is a bitwise-or of the following values:
4365 PUSH_LOCAL: Bind DECL in the current scope, rather than at
4367 PUSH_USING: DECL is being pushed as the result of a using
4370 The value returned may be a previous declaration if we guessed wrong
4371 about what language DECL should belong to (C or C++). Otherwise,
4372 it's always DECL (and never something that's not a _DECL). */
4375 push_overloaded_decl (decl, flags)
4379 tree name = DECL_NAME (decl);
4382 int doing_global = (namespace_bindings_p () || !(flags & PUSH_LOCAL));
4385 old = namespace_binding (name, DECL_CONTEXT (decl));
4387 old = lookup_name_current_level (name);
4391 if (TREE_CODE (old) == TYPE_DECL && DECL_ARTIFICIAL (old))
4393 tree t = TREE_TYPE (old);
4394 if (IS_AGGR_TYPE (t) && warn_shadow
4395 && (! DECL_IN_SYSTEM_HEADER (decl)
4396 || ! DECL_IN_SYSTEM_HEADER (old)))
4397 cp_warning ("`%#D' hides constructor for `%#T'", decl, t);
4400 else if (is_overloaded_fn (old))
4404 for (tmp = old; tmp; tmp = OVL_NEXT (tmp))
4406 tree fn = OVL_CURRENT (tmp);
4408 if (TREE_CODE (tmp) == OVERLOAD && OVL_USED (tmp)
4409 && !(flags & PUSH_USING)
4410 && compparms (TYPE_ARG_TYPES (TREE_TYPE (fn)),
4411 TYPE_ARG_TYPES (TREE_TYPE (decl))))
4412 cp_error ("`%#D' conflicts with previous using declaration `%#D'",
4415 if (duplicate_decls (decl, fn))
4421 cp_error_at ("previous non-function declaration `%#D'", old);
4422 cp_error ("conflicts with function declaration `%#D'", decl);
4427 if (old || TREE_CODE (decl) == TEMPLATE_DECL)
4429 if (old && TREE_CODE (old) != OVERLOAD)
4430 new_binding = ovl_cons (decl, ovl_cons (old, NULL_TREE));
4432 new_binding = ovl_cons (decl, old);
4433 if (flags & PUSH_USING)
4434 OVL_USED (new_binding) = 1;
4437 /* NAME is not ambiguous. */
4441 set_namespace_binding (name, current_namespace, new_binding);
4444 /* We only create an OVERLOAD if there was a previous binding at
4445 this level, or if decl is a template. In the former case, we
4446 need to remove the old binding and replace it with the new
4447 binding. We must also run through the NAMES on the binding
4448 level where the name was bound to update the chain. */
4450 if (TREE_CODE (new_binding) == OVERLOAD && old)
4454 for (d = &BINDING_LEVEL (IDENTIFIER_BINDING (name))->names;
4456 d = &TREE_CHAIN (*d))
4458 || (TREE_CODE (*d) == TREE_LIST
4459 && TREE_VALUE (*d) == old))
4461 if (TREE_CODE (*d) == TREE_LIST)
4462 /* Just replace the old binding with the new. */
4463 TREE_VALUE (*d) = new_binding;
4465 /* Build a TREE_LIST to wrap the OVERLOAD. */
4466 *d = tree_cons (NULL_TREE, new_binding,
4469 /* And update the CPLUS_BINDING node. */
4470 BINDING_VALUE (IDENTIFIER_BINDING (name))
4475 /* We should always find a previous binding in this case. */
4476 my_friendly_abort (0);
4479 /* Install the new binding. */
4480 push_local_binding (name, new_binding, flags);
4486 /* Generate an implicit declaration for identifier FUNCTIONID
4487 as a function of type int (). Print a warning if appropriate. */
4490 implicitly_declare (functionid)
4494 int temp = allocation_temporary_p ();
4496 push_obstacks_nochange ();
4498 /* Save the decl permanently so we can warn if definition follows.
4499 In ANSI C, warn_implicit is usually false, so the saves little space.
4500 But in C++, it's usually true, hence the extra code. */
4501 if (temp && (! warn_implicit || toplevel_bindings_p ()))
4502 end_temporary_allocation ();
4504 /* We used to reuse an old implicit decl here,
4505 but this loses with inline functions because it can clobber
4506 the saved decl chains. */
4507 decl = build_lang_decl (FUNCTION_DECL, functionid, default_function_type);
4509 DECL_EXTERNAL (decl) = 1;
4510 TREE_PUBLIC (decl) = 1;
4512 /* ANSI standard says implicit declarations are in the innermost block.
4513 So we record the decl in the standard fashion. */
4515 rest_of_decl_compilation (decl, NULL_PTR, 0, 0);
4518 /* Only one warning per identifier. */
4519 && IDENTIFIER_IMPLICIT_DECL (functionid) == NULL_TREE)
4521 cp_pedwarn ("implicit declaration of function `%#D'", decl);
4524 SET_IDENTIFIER_IMPLICIT_DECL (functionid, decl);
4531 /* Return zero if the declaration NEWDECL is valid
4532 when the declaration OLDDECL (assumed to be for the same name)
4533 has already been seen.
4534 Otherwise return an error message format string with a %s
4535 where the identifier should go. */
4538 redeclaration_error_message (newdecl, olddecl)
4539 tree newdecl, olddecl;
4541 if (TREE_CODE (newdecl) == TYPE_DECL)
4543 /* Because C++ can put things into name space for free,
4544 constructs like "typedef struct foo { ... } foo"
4545 would look like an erroneous redeclaration. */
4546 if (same_type_p (TREE_TYPE (newdecl), TREE_TYPE (olddecl)))
4549 return "redefinition of `%#D'";
4551 else if (TREE_CODE (newdecl) == FUNCTION_DECL)
4553 /* If this is a pure function, its olddecl will actually be
4554 the original initialization to `0' (which we force to call
4555 abort()). Don't complain about redefinition in this case. */
4556 if (DECL_LANG_SPECIFIC (olddecl) && DECL_ABSTRACT_VIRTUAL_P (olddecl))
4559 /* If both functions come from different namespaces, this is not
4560 a redeclaration - this is a conflict with a used function. */
4561 if (DECL_NAMESPACE_SCOPE_P (olddecl)
4562 && DECL_CONTEXT (olddecl) != DECL_CONTEXT (newdecl))
4563 return "`%D' conflicts with used function";
4565 /* We'll complain about linkage mismatches in
4566 warn_extern_redeclared_static. */
4568 /* Defining the same name twice is no good. */
4569 if (DECL_INITIAL (olddecl) != NULL_TREE
4570 && DECL_INITIAL (newdecl) != NULL_TREE)
4572 if (DECL_NAME (olddecl) == NULL_TREE)
4573 return "`%#D' not declared in class";
4575 return "redefinition of `%#D'";
4579 else if (TREE_CODE (newdecl) == TEMPLATE_DECL)
4581 if ((TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == FUNCTION_DECL
4582 && DECL_INITIAL (DECL_TEMPLATE_RESULT (newdecl))
4583 && DECL_INITIAL (DECL_TEMPLATE_RESULT (olddecl)))
4584 || (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == TYPE_DECL
4585 && TYPE_SIZE (TREE_TYPE (newdecl))
4586 && TYPE_SIZE (TREE_TYPE (olddecl))))
4587 return "redefinition of `%#D'";
4590 else if (toplevel_bindings_p ())
4592 /* Objects declared at top level: */
4593 /* If at least one is a reference, it's ok. */
4594 if (DECL_EXTERNAL (newdecl) || DECL_EXTERNAL (olddecl))
4596 /* Reject two definitions. */
4597 return "redefinition of `%#D'";
4601 /* Objects declared with block scope: */
4602 /* Reject two definitions, and reject a definition
4603 together with an external reference. */
4604 if (!(DECL_EXTERNAL (newdecl) && DECL_EXTERNAL (olddecl)))
4605 return "redeclaration of `%#D'";
4610 /* Create a new label, named ID. */
4613 make_label_decl (id, local_p)
4619 decl = build_decl (LABEL_DECL, id, void_type_node);
4621 /* Make sure every label has an rtx. */
4624 DECL_CONTEXT (decl) = current_function_decl;
4625 DECL_MODE (decl) = VOIDmode;
4626 C_DECLARED_LABEL_FLAG (decl) = local_p;
4628 /* Say where one reference is to the label, for the sake of the
4629 error if it is not defined. */
4630 DECL_SOURCE_LINE (decl) = lineno;
4631 DECL_SOURCE_FILE (decl) = input_filename;
4633 /* Record the fact that this identifier is bound to this label. */
4634 SET_IDENTIFIER_LABEL_VALUE (id, decl);
4636 /* Record this label on the list of used labels so that we can check
4637 at the end of the function to see whether or not the label was
4638 actually defined. */
4639 if ((named_label_uses == NULL || named_label_uses->label_decl != decl)
4640 && (named_label_uses == NULL
4641 || named_label_uses->names_in_scope != current_binding_level->names
4642 || named_label_uses->label_decl != decl))
4644 struct named_label_list *new_ent;
4646 = (struct named_label_list*)oballoc (sizeof (struct named_label_list));
4647 new_ent->label_decl = decl;
4648 new_ent->names_in_scope = current_binding_level->names;
4649 new_ent->binding_level = current_binding_level;
4650 new_ent->lineno_o_goto = lineno;
4651 new_ent->filename_o_goto = input_filename;
4652 new_ent->next = named_label_uses;
4653 named_label_uses = new_ent;
4659 /* Look for a label named ID in the current function. If one cannot
4660 be found, create one. (We keep track of used, but undefined,
4661 labels, and complain about them at the end of a function.) */
4669 /* You can't use labels at global scope. */
4670 if (current_function_decl == NULL_TREE)
4672 error ("label `%s' referenced outside of any function",
4673 IDENTIFIER_POINTER (id));
4677 /* See if we've already got this label. */
4678 decl = IDENTIFIER_LABEL_VALUE (id);
4679 if (decl != NULL_TREE && DECL_CONTEXT (decl) == current_function_decl)
4682 /* Record this label on the list of labels used in this function.
4683 We do this before calling make_label_decl so that we get the
4684 IDENTIFIER_LABEL_VALUE before the new label is declared. */
4685 named_labels = tree_cons (IDENTIFIER_LABEL_VALUE (id), NULL_TREE,
4687 /* We need a new label. */
4688 decl = make_label_decl (id, /*local_p=*/0);
4689 /* Now fill in the information we didn't have before. */
4690 TREE_VALUE (named_labels) = decl;
4695 /* Declare a local label named ID. */
4698 declare_local_label (id)
4703 /* Add a new entry to the SHADOWED_LABELS list so that when we leave
4704 this scope we can restore the old value of
4705 IDENTIFIER_TYPE_VALUE. */
4706 current_binding_level->shadowed_labels
4707 = tree_cons (IDENTIFIER_LABEL_VALUE (id), NULL_TREE,
4708 current_binding_level->shadowed_labels);
4709 /* Look for the label. */
4710 decl = make_label_decl (id, /*local_p=*/1);
4711 /* Now fill in the information we didn't have before. */
4712 TREE_VALUE (current_binding_level->shadowed_labels) = decl;
4717 /* Define a label, specifying the location in the source file.
4718 Return the LABEL_DECL node for the label, if the definition is valid.
4719 Otherwise return 0. */
4722 define_label (filename, line, name)
4727 tree decl = lookup_label (name);
4729 /* After labels, make any new cleanups go into their
4730 own new (temporary) binding contour. */
4731 current_binding_level->more_cleanups_ok = 0;
4733 if (name == get_identifier ("wchar_t"))
4734 cp_pedwarn ("label named wchar_t");
4736 if (DECL_INITIAL (decl) != NULL_TREE)
4738 cp_error ("duplicate label `%D'", decl);
4743 struct named_label_list *uses, *prev;
4747 /* Mark label as having been defined. */
4748 DECL_INITIAL (decl) = error_mark_node;
4749 /* Say where in the source. */
4750 DECL_SOURCE_FILE (decl) = filename;
4751 DECL_SOURCE_LINE (decl) = line;
4754 uses = named_label_uses;
4755 while (uses != NULL)
4756 if (uses->label_decl == decl)
4758 struct binding_level *b = current_binding_level;
4761 tree new_decls = b->names;
4762 tree old_decls = (b == uses->binding_level)
4763 ? uses->names_in_scope : NULL_TREE;
4764 while (new_decls != old_decls)
4766 if (TREE_CODE (new_decls) == VAR_DECL
4767 /* Don't complain about crossing initialization
4768 of internal entities. They can't be accessed,
4769 and they should be cleaned up
4770 by the time we get to the label. */
4771 && ! DECL_ARTIFICIAL (new_decls)
4772 && !(DECL_INITIAL (new_decls) == NULL_TREE
4773 && pod_type_p (TREE_TYPE (new_decls))))
4775 /* This is really only important if we're crossing
4776 an initialization. The POD stuff is just
4777 pedantry; why should it matter if the class
4778 contains a field of pointer to member type? */
4779 int problem = (DECL_INITIAL (new_decls)
4780 || (TYPE_NEEDS_CONSTRUCTING
4781 (TREE_TYPE (new_decls))));
4787 cp_error ("jump to label `%D'", decl);
4788 error_with_file_and_line
4789 (uses->filename_o_goto,
4790 uses->lineno_o_goto, " from here");
4794 cp_pedwarn ("jump to label `%D'", decl);
4795 pedwarn_with_file_and_line
4796 (uses->filename_o_goto,
4797 uses->lineno_o_goto, " from here");
4803 cp_error_at (" crosses initialization of `%#D'",
4806 cp_pedwarn_at (" enters scope of non-POD `%#D'",
4809 new_decls = TREE_CHAIN (new_decls);
4811 if (b == uses->binding_level)
4813 if (b->eh_region && ! saw_eh)
4817 cp_error ("jump to label `%D'", decl);
4818 error_with_file_and_line
4819 (uses->filename_o_goto,
4820 uses->lineno_o_goto, " from here");
4823 error (" enters exception handling block");
4830 prev->next = uses->next;
4832 named_label_uses = uses->next;
4841 current_function_return_value = NULL_TREE;
4848 struct binding_level *level;
4849 struct cp_switch *next;
4852 static struct cp_switch *switch_stack;
4858 = (struct cp_switch *) oballoc (sizeof (struct cp_switch));
4859 p->level = current_binding_level;
4860 p->next = switch_stack;
4867 switch_stack = switch_stack->next;
4870 /* Note that we've seen a definition of a case label, and complain if this
4871 is a bad place for one. */
4874 define_case_label ()
4876 tree cleanup = last_cleanup_this_contour ();
4877 struct binding_level *b = current_binding_level;
4881 /* Don't crash; we'll complain in do_case. */
4886 static int explained = 0;
4887 cp_warning_at ("destructor needed for `%#D'", TREE_PURPOSE (cleanup));
4888 warning ("where case label appears here");
4891 warning ("(enclose actions of previous case statements requiring");
4892 warning ("destructors in their own binding contours.)");
4897 for (; b && b != switch_stack->level; b = b->level_chain)
4899 tree new_decls = b->names;
4900 for (; new_decls; new_decls = TREE_CHAIN (new_decls))
4902 if (TREE_CODE (new_decls) == VAR_DECL
4903 /* Don't complain about crossing initialization
4904 of internal entities. They can't be accessed,
4905 and they should be cleaned up
4906 by the time we get to the label. */
4907 && ! DECL_ARTIFICIAL (new_decls)
4908 && ((DECL_INITIAL (new_decls) != NULL_TREE
4909 && DECL_INITIAL (new_decls) != error_mark_node)
4910 || TYPE_NEEDS_CONSTRUCTING (TREE_TYPE (new_decls))))
4913 error ("jump to case label");
4915 cp_error_at (" crosses initialization of `%#D'",
4921 /* After labels, make any new cleanups go into their
4922 own new (temporary) binding contour. */
4924 current_binding_level->more_cleanups_ok = 0;
4925 current_function_return_value = NULL_TREE;
4928 /* Return the list of declarations of the current level.
4929 Note that this list is in reverse order unless/until
4930 you nreverse it; and when you do nreverse it, you must
4931 store the result back using `storedecls' or you will lose. */
4936 return current_binding_level->names;
4939 /* Return the list of type-tags (for structs, etc) of the current level. */
4944 return current_binding_level->tags;
4947 /* Store the list of declarations of the current level.
4948 This is done for the parameter declarations of a function being defined,
4949 after they are modified in the light of any missing parameters. */
4955 current_binding_level->names = decls;
4958 /* Similarly, store the list of tags of the current level. */
4964 current_binding_level->tags = tags;
4967 /* Given NAME, an IDENTIFIER_NODE,
4968 return the structure (or union or enum) definition for that name.
4969 Searches binding levels from BINDING_LEVEL up to the global level.
4970 If THISLEVEL_ONLY is nonzero, searches only the specified context
4971 (but skips any tag-transparent contexts to find one that is
4972 meaningful for tags).
4973 FORM says which kind of type the caller wants;
4974 it is RECORD_TYPE or UNION_TYPE or ENUMERAL_TYPE.
4975 If the wrong kind of type is found, and it's not a template, an error is
4979 lookup_tag (form, name, binding_level, thislevel_only)
4980 enum tree_code form;
4982 struct binding_level *binding_level;
4985 register struct binding_level *level;
4986 /* Non-zero if, we should look past a pseudo-global level, even if
4988 int allow_pseudo_global = 1;
4990 for (level = binding_level; level; level = level->level_chain)
4993 if (ANON_AGGRNAME_P (name))
4994 for (tail = level->tags; tail; tail = TREE_CHAIN (tail))
4996 /* There's no need for error checking here, because
4997 anon names are unique throughout the compilation. */
4998 if (TYPE_IDENTIFIER (TREE_VALUE (tail)) == name)
4999 return TREE_VALUE (tail);
5001 else if (level->namespace_p)
5002 /* Do namespace lookup. */
5003 for (tail = current_namespace; 1; tail = CP_DECL_CONTEXT (tail))
5005 tree old = binding_for_name (name, tail);
5007 /* If we just skipped past a pseudo global level, even
5008 though THISLEVEL_ONLY, and we find a template class
5009 declaration, then we use the _TYPE node for the
5010 template. See the example below. */
5011 if (thislevel_only && !allow_pseudo_global
5012 && old && BINDING_VALUE (old)
5013 && DECL_CLASS_TEMPLATE_P (BINDING_VALUE (old)))
5014 old = TREE_TYPE (BINDING_VALUE (old));
5016 old = BINDING_TYPE (old);
5018 /* If it has an original type, it is a typedef, and we
5019 should not return it. */
5020 if (old && DECL_ORIGINAL_TYPE (TYPE_NAME (old)))
5022 if (old && TREE_CODE (old) != form
5023 && !(form != ENUMERAL_TYPE && TREE_CODE (old) == TEMPLATE_DECL))
5025 cp_error ("`%#D' redeclared as %C", old, form);
5030 if (thislevel_only || tail == global_namespace)
5034 for (tail = level->tags; tail; tail = TREE_CHAIN (tail))
5036 if (TREE_PURPOSE (tail) == name)
5038 enum tree_code code = TREE_CODE (TREE_VALUE (tail));
5039 /* Should tighten this up; it'll probably permit
5040 UNION_TYPE and a struct template, for example. */
5042 && !(form != ENUMERAL_TYPE && code == TEMPLATE_DECL))
5044 /* Definition isn't the kind we were looking for. */
5045 cp_error ("`%#D' redeclared as %C", TREE_VALUE (tail),
5049 return TREE_VALUE (tail);
5052 if (thislevel_only && ! level->tag_transparent)
5054 if (level->pseudo_global && allow_pseudo_global)
5056 /* We must deal with cases like this:
5058 template <class T> struct S;
5059 template <class T> struct S {};
5061 When looking up `S', for the second declaration, we
5062 would like to find the first declaration. But, we
5063 are in the pseudo-global level created for the
5064 template parameters, rather than the (surrounding)
5065 namespace level. Thus, we keep going one more level,
5066 even though THISLEVEL_ONLY is non-zero. */
5067 allow_pseudo_global = 0;
5079 set_current_level_tags_transparency (tags_transparent)
5080 int tags_transparent;
5082 current_binding_level->tag_transparent = tags_transparent;
5086 /* Given a type, find the tag that was defined for it and return the tag name.
5087 Otherwise return 0. However, the value can never be 0
5088 in the cases in which this is used.
5090 C++: If NAME is non-zero, this is the new name to install. This is
5091 done when replacing anonymous tags with real tag names. */
5094 lookup_tag_reverse (type, name)
5098 register struct binding_level *level;
5100 for (level = current_binding_level; level; level = level->level_chain)
5103 for (tail = level->tags; tail; tail = TREE_CHAIN (tail))
5105 if (TREE_VALUE (tail) == type)
5108 TREE_PURPOSE (tail) = name;
5109 return TREE_PURPOSE (tail);
5116 /* Look up NAME in the NAMESPACE. */
5119 lookup_namespace_name (namespace, name)
5120 tree namespace, name;
5123 tree template_id = NULL_TREE;
5125 my_friendly_assert (TREE_CODE (namespace) == NAMESPACE_DECL, 370);
5127 if (TREE_CODE (name) == NAMESPACE_DECL)
5128 /* This happens for A::B<int> when B is a namespace. */
5130 else if (TREE_CODE (name) == TEMPLATE_DECL)
5132 /* This happens for A::B where B is a template, and there are no
5133 template arguments. */
5134 cp_error ("invalid use of `%D'", name);
5135 return error_mark_node;
5138 namespace = ORIGINAL_NAMESPACE (namespace);
5140 if (TREE_CODE (name) == TEMPLATE_ID_EXPR)
5143 name = TREE_OPERAND (name, 0);
5144 if (TREE_CODE (name) == OVERLOAD)
5145 name = DECL_NAME (OVL_CURRENT (name));
5146 else if (TREE_CODE_CLASS (TREE_CODE (name)) == 'd')
5147 name = DECL_NAME (name);
5150 my_friendly_assert (TREE_CODE (name) == IDENTIFIER_NODE, 373);
5152 val = make_node (CPLUS_BINDING);
5153 if (!qualified_lookup_using_namespace (name, namespace, val, 0))
5154 return error_mark_node;
5156 if (BINDING_VALUE (val))
5158 val = BINDING_VALUE (val);
5162 if (DECL_CLASS_TEMPLATE_P (val))
5163 val = lookup_template_class (val,
5164 TREE_OPERAND (template_id, 1),
5165 /*in_decl=*/NULL_TREE,
5166 /*context=*/NULL_TREE,
5167 /*entering_scope=*/0);
5168 else if (DECL_FUNCTION_TEMPLATE_P (val)
5169 || TREE_CODE (val) == OVERLOAD)
5170 val = lookup_template_function (val,
5171 TREE_OPERAND (template_id, 1));
5174 cp_error ("`%D::%D' is not a template",
5176 return error_mark_node;
5180 /* If we have a single function from a using decl, pull it out. */
5181 if (TREE_CODE (val) == OVERLOAD && ! really_overloaded_fn (val))
5182 val = OVL_FUNCTION (val);
5186 cp_error ("`%D' undeclared in namespace `%D'", name, namespace);
5187 return error_mark_node;
5190 /* Hash a TYPENAME_TYPE. K is really of type `tree'. */
5192 static unsigned long
5200 hash = (((unsigned long) TYPE_CONTEXT (t))
5201 ^ ((unsigned long) DECL_NAME (TYPE_NAME (t))));
5206 /* Compare two TYPENAME_TYPEs. K1 and K2 are really of type `tree'. */
5209 typename_compare (k1, k2)
5220 d1 = TYPE_NAME (t1);
5221 d2 = TYPE_NAME (t2);
5223 return (DECL_NAME (d1) == DECL_NAME (d2)
5224 && same_type_p (TYPE_CONTEXT (t1), TYPE_CONTEXT (t2))
5225 && ((TREE_TYPE (t1) != NULL_TREE)
5226 == (TREE_TYPE (t2) != NULL_TREE))
5227 && same_type_p (TREE_TYPE (t1), TREE_TYPE (t2))
5228 && TYPENAME_TYPE_FULLNAME (t1) == TYPENAME_TYPE_FULLNAME (t2));
5231 /* Build a TYPENAME_TYPE. If the type is `typename T::t', CONTEXT is
5232 the type of `T', NAME is the IDENTIFIER_NODE for `t'. If BASE_TYPE
5233 is non-NULL, this type is being created by the implicit typename
5234 extension, and BASE_TYPE is a type named `t' in some base class of
5235 `T' which depends on template parameters.
5237 Returns the new TYPENAME_TYPE. */
5240 build_typename_type (context, name, fullname, base_type)
5248 struct hash_entry* e;
5250 static struct hash_table ht;
5252 push_obstacks (&permanent_obstack, &permanent_obstack);
5256 static struct hash_table *h = &ht;
5257 if (!hash_table_init (&ht, &hash_newfunc, &typename_hash,
5259 fatal ("virtual memory exhausted");
5260 ggc_add_tree_hash_table_root (&h, 1);
5263 /* Build the TYPENAME_TYPE. */
5264 t = make_lang_type (TYPENAME_TYPE);
5265 TYPE_CONTEXT (t) = FROB_CONTEXT (context);
5266 TYPENAME_TYPE_FULLNAME (t) = fullname;
5267 TREE_TYPE (t) = base_type;
5269 /* Build the corresponding TYPE_DECL. */
5270 d = build_decl (TYPE_DECL, name, t);
5271 TYPE_NAME (TREE_TYPE (d)) = d;
5272 TYPE_STUB_DECL (TREE_TYPE (d)) = d;
5273 DECL_CONTEXT (d) = FROB_CONTEXT (context);
5274 DECL_ARTIFICIAL (d) = 1;
5276 /* See if we already have this type. */
5277 e = hash_lookup (&ht, t, /*create=*/false, /*copy=*/0);
5281 /* Insert the type into the table. */
5282 hash_lookup (&ht, t, /*create=*/true, /*copy=*/0);
5290 make_typename_type (context, name)
5295 if (TREE_CODE_CLASS (TREE_CODE (name)) == 't')
5297 if (!(TYPE_LANG_SPECIFIC (name)
5298 && (CLASSTYPE_IS_TEMPLATE (name)
5299 || CLASSTYPE_USE_TEMPLATE (name))))
5300 name = TYPE_IDENTIFIER (name);
5302 /* Create a TEMPLATE_ID_EXPR for the type. */
5303 name = build_nt (TEMPLATE_ID_EXPR,
5304 CLASSTYPE_TI_TEMPLATE (name),
5305 CLASSTYPE_TI_ARGS (name));
5307 else if (TREE_CODE (name) == TYPE_DECL)
5308 name = DECL_NAME (name);
5312 if (TREE_CODE (name) == TEMPLATE_ID_EXPR)
5314 name = TREE_OPERAND (name, 0);
5315 if (TREE_CODE (name) == TEMPLATE_DECL)
5316 name = TREE_OPERAND (fullname, 0) = DECL_NAME (name);
5318 if (TREE_CODE (name) != IDENTIFIER_NODE)
5319 my_friendly_abort (2000);
5321 if (TREE_CODE (context) == NAMESPACE_DECL)
5323 /* We can get here from typename_sub0 in the explicit_template_type
5324 expansion. Just fail. */
5325 cp_error ("no class template named `%#T' in `%#T'",
5327 return error_mark_node;
5330 if (! uses_template_parms (context)
5331 || currently_open_class (context))
5333 if (TREE_CODE (fullname) == TEMPLATE_ID_EXPR)
5335 tree tmpl = NULL_TREE;
5336 if (IS_AGGR_TYPE (context))
5337 tmpl = lookup_field (context, name, 0, 0);
5338 if (!tmpl || !DECL_CLASS_TEMPLATE_P (tmpl))
5340 cp_error ("no class template named `%#T' in `%#T'",
5342 return error_mark_node;
5345 return lookup_template_class (tmpl,
5346 TREE_OPERAND (fullname, 1),
5348 /*entering_scope=*/0);
5354 if (!IS_AGGR_TYPE (context))
5356 cp_error ("no type named `%#T' in `%#T'", name, context);
5357 return error_mark_node;
5360 t = lookup_field (context, name, 0, 1);
5362 return TREE_TYPE (t);
5366 /* If the CONTEXT is not a template type, then either the field is
5367 there now or its never going to be. */
5368 if (!uses_template_parms (context))
5370 cp_error ("no type named `%#T' in `%#T'", name, context);
5371 return error_mark_node;
5375 return build_typename_type (context, name, fullname, NULL_TREE);
5378 /* Select the right _DECL from multiple choices. */
5381 select_decl (binding, flags)
5386 val = BINDING_VALUE (binding);
5387 if (LOOKUP_NAMESPACES_ONLY (flags))
5389 /* We are not interested in types. */
5390 if (val && TREE_CODE (val) == NAMESPACE_DECL)
5395 /* If we could have a type and
5396 we have nothing or we need a type and have none. */
5397 if (BINDING_TYPE (binding)
5398 && (!val || ((flags & LOOKUP_PREFER_TYPES)
5399 && TREE_CODE (val) != TYPE_DECL)))
5400 val = TYPE_STUB_DECL (BINDING_TYPE (binding));
5401 /* Don't return non-types if we really prefer types. */
5402 else if (val && LOOKUP_TYPES_ONLY (flags) && TREE_CODE (val) != TYPE_DECL
5403 && (TREE_CODE (val) != TEMPLATE_DECL
5404 || !DECL_CLASS_TEMPLATE_P (val)))
5410 /* Unscoped lookup of a global: iterate over current namespaces,
5411 considering using-directives. If SPACESP is non-NULL, store a list
5412 of the namespaces we've considered in it. */
5415 unqualified_namespace_lookup (name, flags, spacesp)
5420 tree b = make_node (CPLUS_BINDING);
5421 tree initial = current_decl_namespace();
5422 tree scope = initial;
5424 struct binding_level *level;
5425 tree val = NULL_TREE;
5428 *spacesp = NULL_TREE;
5430 for (; !val; scope = CP_DECL_CONTEXT (scope))
5433 *spacesp = tree_cons (scope, NULL_TREE, *spacesp);
5434 val = binding_for_name (name, scope);
5436 /* Initialize binding for this context. */
5437 BINDING_VALUE (b) = BINDING_VALUE (val);
5438 BINDING_TYPE (b) = BINDING_TYPE (val);
5440 /* Add all _DECLs seen through local using-directives. */
5441 for (level = current_binding_level;
5442 !level->namespace_p;
5443 level = level->level_chain)
5444 if (!lookup_using_namespace (name, b, level->using_directives,
5445 scope, flags, spacesp))
5446 /* Give up because of error. */
5447 return error_mark_node;
5449 /* Add all _DECLs seen through global using-directives. */
5450 /* XXX local and global using lists should work equally. */
5454 if (!lookup_using_namespace (name, b, DECL_NAMESPACE_USING (siter),
5455 scope, flags, spacesp))
5456 /* Give up because of error. */
5457 return error_mark_node;
5458 if (siter == scope) break;
5459 siter = CP_DECL_CONTEXT (siter);
5462 val = select_decl (b, flags);
5463 if (scope == global_namespace)
5469 /* Combine prefer_type and namespaces_only into flags. */
5472 lookup_flags (prefer_type, namespaces_only)
5473 int prefer_type, namespaces_only;
5475 if (namespaces_only)
5476 return LOOKUP_PREFER_NAMESPACES;
5477 if (prefer_type > 1)
5478 return LOOKUP_PREFER_TYPES;
5479 if (prefer_type > 0)
5480 return LOOKUP_PREFER_BOTH;
5484 /* Given a lookup that returned VAL, use FLAGS to decide if we want to
5485 ignore it or not. Subroutine of lookup_name_real. */
5488 qualify_lookup (val, flags)
5492 if (val == NULL_TREE)
5494 if ((flags & LOOKUP_PREFER_NAMESPACES) && TREE_CODE (val) == NAMESPACE_DECL)
5496 if ((flags & LOOKUP_PREFER_TYPES)
5497 && (TREE_CODE (val) == TYPE_DECL
5498 || ((flags & LOOKUP_TEMPLATES_EXPECTED)
5499 && DECL_CLASS_TEMPLATE_P (val))))
5501 if (flags & (LOOKUP_PREFER_NAMESPACES | LOOKUP_PREFER_TYPES))
5506 /* Any other BINDING overrides an implicit TYPENAME. Warn about
5510 warn_about_implicit_typename_lookup (typename, binding)
5514 tree subtype = TREE_TYPE (TREE_TYPE (typename));
5515 tree name = DECL_NAME (typename);
5517 if (! (TREE_CODE (binding) == TEMPLATE_DECL
5518 && CLASSTYPE_TEMPLATE_INFO (subtype)
5519 && CLASSTYPE_TI_TEMPLATE (subtype) == binding)
5520 && ! (TREE_CODE (binding) == TYPE_DECL
5521 && same_type_p (TREE_TYPE (binding), subtype)))
5523 cp_warning ("lookup of `%D' finds `%#D'",
5525 cp_warning (" instead of `%D' from dependent base class",
5527 cp_warning (" (use `typename %T::%D' if that's what you meant)",
5528 constructor_name (current_class_type), name);
5532 /* Look up NAME in the current binding level and its superiors in the
5533 namespace of variables, functions and typedefs. Return a ..._DECL
5534 node of some kind representing its definition if there is only one
5535 such declaration, or return a TREE_LIST with all the overloaded
5536 definitions if there are many, or return 0 if it is undefined.
5538 If PREFER_TYPE is > 0, we prefer TYPE_DECLs or namespaces.
5539 If PREFER_TYPE is > 1, we reject non-type decls (e.g. namespaces).
5540 If PREFER_TYPE is -2, we're being called from yylex(). (UGLY)
5541 Otherwise we prefer non-TYPE_DECLs.
5543 If NONCLASS is non-zero, we don't look for the NAME in class scope,
5544 using IDENTIFIER_CLASS_VALUE. */
5547 lookup_name_real (name, prefer_type, nonclass, namespaces_only)
5549 int prefer_type, nonclass, namespaces_only;
5552 tree val = NULL_TREE;
5554 tree from_obj = NULL_TREE;
5556 int val_is_implicit_typename = 0;
5558 /* Hack: copy flag set by parser, if set. */
5559 if (only_namespace_names)
5560 namespaces_only = 1;
5562 if (prefer_type == -2)
5564 extern int looking_for_typename;
5565 tree type = NULL_TREE;
5568 prefer_type = looking_for_typename;
5570 flags = lookup_flags (prefer_type, namespaces_only);
5571 /* If the next thing is '<', class templates are types. */
5572 if (looking_for_template)
5573 flags |= LOOKUP_TEMPLATES_EXPECTED;
5575 /* std:: becomes :: for now. */
5576 if (got_scope == std_node)
5577 got_scope = void_type_node;
5581 else if (got_object != error_mark_node)
5586 if (type == error_mark_node)
5587 return error_mark_node;
5588 if (TREE_CODE (type) == TYPENAME_TYPE && TREE_TYPE (type))
5589 type = TREE_TYPE (type);
5592 type = complete_type (type);
5594 if (TREE_CODE (type) == VOID_TYPE)
5595 type = global_namespace;
5596 if (TREE_CODE (type) == NAMESPACE_DECL)
5598 val = make_node (CPLUS_BINDING);
5599 flags |= LOOKUP_COMPLAIN;
5600 if (!qualified_lookup_using_namespace (name, type, val, flags))
5602 val = select_decl (val, flags);
5604 else if (! IS_AGGR_TYPE (type)
5605 || TREE_CODE (type) == TEMPLATE_TYPE_PARM
5606 || TREE_CODE (type) == TEMPLATE_TEMPLATE_PARM
5607 || TREE_CODE (type) == TYPENAME_TYPE)
5608 /* Someone else will give an error about this if needed. */
5610 else if (type == current_class_type)
5611 val = IDENTIFIER_CLASS_VALUE (name);
5613 val = lookup_member (type, name, 0, prefer_type);
5620 else if (got_object && val)
5625 flags = lookup_flags (prefer_type, namespaces_only);
5626 /* If we're not parsing, we need to complain. */
5627 flags |= LOOKUP_COMPLAIN;
5630 /* First, look in non-namespace scopes. */
5632 if (current_class_type == NULL_TREE)
5635 for (t = IDENTIFIER_BINDING (name); t; t = TREE_CHAIN (t))
5639 if (!LOCAL_BINDING_P (t) && nonclass)
5640 /* We're not looking for class-scoped bindings, so keep going. */
5643 /* If this is the kind of thing we're looking for, we're done. */
5644 if (qualify_lookup (BINDING_VALUE (t), flags))
5645 binding = BINDING_VALUE (t);
5646 else if ((flags & LOOKUP_PREFER_TYPES)
5647 && qualify_lookup (BINDING_TYPE (t), flags))
5648 binding = BINDING_TYPE (t);
5650 binding = NULL_TREE;
5653 && (!val || !IMPLICIT_TYPENAME_TYPE_DECL_P (binding)))
5655 if (val_is_implicit_typename && !yylex)
5656 warn_about_implicit_typename_lookup (val, binding);
5658 val_is_implicit_typename
5659 = IMPLICIT_TYPENAME_TYPE_DECL_P (val);
5660 if (!val_is_implicit_typename)
5665 /* Now lookup in namespace scopes. */
5666 if (!val || val_is_implicit_typename)
5668 t = unqualified_namespace_lookup (name, flags, 0);
5671 if (val_is_implicit_typename && !yylex)
5672 warn_about_implicit_typename_lookup (val, t);
5680 /* This should only warn about types used in qualified-ids. */
5681 if (from_obj && from_obj != val)
5683 if (looking_for_typename && TREE_CODE (from_obj) == TYPE_DECL
5684 && TREE_CODE (val) == TYPE_DECL
5685 && TREE_TYPE (from_obj) != TREE_TYPE (val))
5687 cp_pedwarn ("lookup of `%D' in the scope of `%#T' (`%#T')",
5688 name, got_object, TREE_TYPE (from_obj));
5689 cp_pedwarn (" does not match lookup in the current scope (`%#T')",
5693 /* We don't change val to from_obj if got_object depends on
5694 template parms because that breaks implicit typename for
5695 destructor calls. */
5696 if (! uses_template_parms (got_object))
5700 /* If we have a single function from a using decl, pull it out. */
5701 if (TREE_CODE (val) == OVERLOAD && ! really_overloaded_fn (val))
5702 val = OVL_FUNCTION (val);
5711 lookup_name_nonclass (name)
5714 return lookup_name_real (name, 0, 1, 0);
5718 lookup_function_nonclass (name, args)
5722 return lookup_arg_dependent (name, lookup_name_nonclass (name), args);
5726 lookup_name_namespace_only (name)
5729 /* type-or-namespace, nonclass, namespace_only */
5730 return lookup_name_real (name, 1, 1, 1);
5734 lookup_name (name, prefer_type)
5738 return lookup_name_real (name, prefer_type, 0, 0);
5741 /* Similar to `lookup_name' but look only in the innermost non-class
5745 lookup_name_current_level (name)
5748 struct binding_level *b;
5751 b = current_binding_level;
5752 while (b->parm_flag == 2)
5757 t = IDENTIFIER_NAMESPACE_VALUE (name);
5759 /* extern "C" function() */
5760 if (t != NULL_TREE && TREE_CODE (t) == TREE_LIST)
5763 else if (IDENTIFIER_BINDING (name)
5764 && LOCAL_BINDING_P (IDENTIFIER_BINDING (name)))
5768 if (BINDING_LEVEL (IDENTIFIER_BINDING (name)) == b)
5769 return IDENTIFIER_VALUE (name);
5781 /* Like lookup_name_current_level, but for types. */
5784 lookup_type_current_level (name)
5787 register tree t = NULL_TREE;
5789 my_friendly_assert (! current_binding_level->namespace_p, 980716);
5791 if (REAL_IDENTIFIER_TYPE_VALUE (name) != NULL_TREE
5792 && REAL_IDENTIFIER_TYPE_VALUE (name) != global_type_node)
5794 struct binding_level *b = current_binding_level;
5797 if (purpose_member (name, b->type_shadowed))
5798 return REAL_IDENTIFIER_TYPE_VALUE (name);
5810 begin_only_namespace_names ()
5812 only_namespace_names = 1;
5816 end_only_namespace_names ()
5818 only_namespace_names = 0;
5821 /* Arrange for the user to get a source line number, even when the
5822 compiler is going down in flames, so that she at least has a
5823 chance of working around problems in the compiler. We used to
5824 call error(), but that let the segmentation fault continue
5825 through; now, it's much more passive by asking them to send the
5826 maintainers mail about the problem. */
5830 int sig ATTRIBUTE_UNUSED;
5832 signal (SIGSEGV, SIG_DFL);
5834 signal (SIGIOT, SIG_DFL);
5837 signal (SIGILL, SIG_DFL);
5840 signal (SIGABRT, SIG_DFL);
5843 signal (SIGBUS, SIG_DFL);
5845 my_friendly_abort (0);
5848 /* Push the declarations of builtin types into the namespace.
5849 RID_INDEX, if < RID_MAX is the index of the builtin type
5850 in the array RID_POINTERS. NAME is the name used when looking
5851 up the builtin type. TYPE is the _TYPE node for the builtin type. */
5854 record_builtin_type (rid_index, name, type)
5859 tree rname = NULL_TREE, tname = NULL_TREE;
5860 tree tdecl = NULL_TREE;
5862 if ((int) rid_index < (int) RID_MAX)
5863 rname = ridpointers[(int) rid_index];
5865 tname = get_identifier (name);
5867 TYPE_BUILT_IN (type) = 1;
5871 tdecl = pushdecl (build_decl (TYPE_DECL, tname, type));
5872 set_identifier_type_value (tname, NULL_TREE);
5873 if ((int) rid_index < (int) RID_MAX)
5874 /* Built-in types live in the global namespace. */
5875 SET_IDENTIFIER_GLOBAL_VALUE (tname, tdecl);
5877 if (rname != NULL_TREE)
5879 if (tname != NULL_TREE)
5881 set_identifier_type_value (rname, NULL_TREE);
5882 SET_IDENTIFIER_GLOBAL_VALUE (rname, tdecl);
5886 tdecl = pushdecl (build_decl (TYPE_DECL, rname, type));
5887 set_identifier_type_value (rname, NULL_TREE);
5892 /* Record one of the standard Java types.
5893 * Declare it as having the given NAME.
5894 * If SIZE > 0, it is the size of one of the integral types;
5895 * otherwise it is the negative of the size of one of the other types. */
5898 record_builtin_java_type (name, size)
5904 type = make_signed_type (size);
5905 else if (size > -32)
5906 { /* "__java_char" or ""__java_boolean". */
5907 type = make_unsigned_type (-size);
5908 /*if (size == -1) TREE_SET_CODE (type, BOOLEAN_TYPE);*/
5911 { /* "__java_float" or ""__java_double". */
5912 type = make_node (REAL_TYPE);
5913 TYPE_PRECISION (type) = - size;
5916 record_builtin_type (RID_MAX, name, type);
5917 decl = TYPE_NAME (type);
5919 /* Suppress generate debug symbol entries for these types,
5920 since for normal C++ they are just clutter.
5921 However, push_lang_context undoes this if extern "Java" is seen. */
5922 DECL_IGNORED_P (decl) = 1;
5924 TYPE_FOR_JAVA (type) = 1;
5928 /* Push a type into the namespace so that the back-ends ignore it. */
5931 record_unknown_type (type, name)
5935 tree decl = pushdecl (build_decl (TYPE_DECL, get_identifier (name), type));
5936 /* Make sure the "unknown type" typedecl gets ignored for debug info. */
5937 DECL_IGNORED_P (decl) = 1;
5938 TYPE_DECL_SUPPRESS_DEBUG (decl) = 1;
5939 TYPE_SIZE (type) = TYPE_SIZE (void_type_node);
5940 TYPE_ALIGN (type) = 1;
5941 TYPE_MODE (type) = TYPE_MODE (void_type_node);
5944 /* Push overloaded decl, in global scope, with one argument so it
5945 can be used as a callback from define_function. */
5948 push_overloaded_decl_1 (x)
5951 push_overloaded_decl (x, PUSH_GLOBAL);
5958 auto_function (name, type)
5961 return define_function
5962 (IDENTIFIER_POINTER (name), type, push_overloaded_decl_1,
5963 IDENTIFIER_POINTER (build_decl_overload (name, TYPE_ARG_TYPES (type),
5967 /* Create the predefined scalar types of C,
5968 and some nodes representing standard constants (0, 1, (void *)0).
5969 Initialize the global binding level.
5970 Make definitions for built-in primitive functions. */
5973 init_decl_processing ()
5976 int wchar_type_size;
5977 tree array_domain_type;
5979 /* Have to make these distinct before we try using them. */
5980 lang_name_cplusplus = get_identifier ("C++");
5981 lang_name_c = get_identifier ("C");
5982 lang_name_java = get_identifier ("Java");
5984 /* Let the back-end now how to save and restore language-specific
5985 per-function globals. */
5986 init_lang_status = &push_cp_function_context;
5987 free_lang_status = &pop_cp_function_context;
5988 mark_lang_status = &mark_cp_function_context;
5994 /* Create the global variables. */
5995 push_to_top_level ();
5997 /* Enter the global namespace. */
5998 my_friendly_assert (global_namespace == NULL_TREE, 375);
5999 push_namespace (get_identifier ("::"));
6000 global_namespace = current_namespace;
6001 current_lang_name = NULL_TREE;
6003 if (flag_strict_prototype == 2)
6004 flag_strict_prototype = pedantic;
6005 if (! flag_permissive && ! pedantic)
6006 flag_pedantic_errors = 1;
6008 strict_prototypes_lang_c = flag_strict_prototype;
6011 current_lang_name = lang_name_c;
6013 current_function_decl = NULL_TREE;
6014 current_binding_level = NULL_BINDING_LEVEL;
6015 free_binding_level = NULL_BINDING_LEVEL;
6017 /* Because most segmentation signals can be traced back into user
6018 code, catch them and at least give the user a chance of working
6019 around compiler bugs. */
6020 signal (SIGSEGV, signal_catch);
6022 /* We will also catch aborts in the back-end through signal_catch and
6023 give the user a chance to see where the error might be, and to defeat
6024 aborts in the back-end when there have been errors previously in their
6027 signal (SIGIOT, signal_catch);
6030 signal (SIGILL, signal_catch);
6033 signal (SIGABRT, signal_catch);
6036 signal (SIGBUS, signal_catch);
6039 build_common_tree_nodes (flag_signed_char);
6041 error_mark_list = build_tree_list (error_mark_node, error_mark_node);
6042 TREE_TYPE (error_mark_list) = error_mark_node;
6044 /* Make the binding_level structure for global names. */
6046 global_binding_level = current_binding_level;
6047 /* The global level is the namespace level of ::. */
6048 NAMESPACE_LEVEL (global_namespace) = global_binding_level;
6049 declare_namespace_level ();
6051 this_identifier = get_identifier (THIS_NAME);
6052 in_charge_identifier = get_identifier (IN_CHARGE_NAME);
6053 ctor_identifier = get_identifier (CTOR_NAME);
6054 dtor_identifier = get_identifier (DTOR_NAME);
6055 pfn_identifier = get_identifier (VTABLE_PFN_NAME);
6056 index_identifier = get_identifier (VTABLE_INDEX_NAME);
6057 delta_identifier = get_identifier (VTABLE_DELTA_NAME);
6058 delta2_identifier = get_identifier (VTABLE_DELTA2_NAME);
6059 pfn_or_delta2_identifier = get_identifier ("__pfn_or_delta2");
6061 /* Define `int' and `char' first so that dbx will output them first. */
6062 record_builtin_type (RID_INT, NULL_PTR, integer_type_node);
6063 record_builtin_type (RID_CHAR, "char", char_type_node);
6065 /* `signed' is the same as `int' */
6066 record_builtin_type (RID_SIGNED, NULL_PTR, integer_type_node);
6067 record_builtin_type (RID_LONG, "long int", long_integer_type_node);
6068 record_builtin_type (RID_UNSIGNED, "unsigned int", unsigned_type_node);
6069 record_builtin_type (RID_MAX, "long unsigned int", long_unsigned_type_node);
6070 record_builtin_type (RID_MAX, "unsigned long", long_unsigned_type_node);
6071 record_builtin_type (RID_MAX, "long long int", long_long_integer_type_node);
6072 record_builtin_type (RID_MAX, "long long unsigned int",
6073 long_long_unsigned_type_node);
6074 record_builtin_type (RID_MAX, "long long unsigned",
6075 long_long_unsigned_type_node);
6076 record_builtin_type (RID_SHORT, "short int", short_integer_type_node);
6077 record_builtin_type (RID_MAX, "short unsigned int", short_unsigned_type_node);
6078 record_builtin_type (RID_MAX, "unsigned short", short_unsigned_type_node);
6081 = TREE_TYPE (IDENTIFIER_GLOBAL_VALUE (get_identifier (PTRDIFF_TYPE)));
6083 /* Define both `signed char' and `unsigned char'. */
6084 record_builtin_type (RID_MAX, "signed char", signed_char_type_node);
6085 record_builtin_type (RID_MAX, "unsigned char", unsigned_char_type_node);
6087 /* `unsigned long' is the standard type for sizeof.
6088 Note that stddef.h uses `unsigned long',
6089 and this must agree, even if long and int are the same size. */
6091 (TREE_TYPE (IDENTIFIER_GLOBAL_VALUE (get_identifier (SIZE_TYPE))));
6093 /* Create the widest literal types. */
6094 widest_integer_literal_type_node = make_signed_type (HOST_BITS_PER_WIDE_INT * 2);
6095 pushdecl (build_decl (TYPE_DECL, NULL_TREE,
6096 widest_integer_literal_type_node));
6098 widest_unsigned_literal_type_node = make_unsigned_type (HOST_BITS_PER_WIDE_INT * 2);
6099 pushdecl (build_decl (TYPE_DECL, NULL_TREE,
6100 widest_unsigned_literal_type_node));
6102 /* These are types that type_for_size and type_for_mode use. */
6103 pushdecl (build_decl (TYPE_DECL, NULL_TREE, intQI_type_node));
6104 pushdecl (build_decl (TYPE_DECL, NULL_TREE, intHI_type_node));
6105 pushdecl (build_decl (TYPE_DECL, NULL_TREE, intSI_type_node));
6106 pushdecl (build_decl (TYPE_DECL, NULL_TREE, intDI_type_node));
6107 #if HOST_BITS_PER_WIDE_INT >= 64
6108 pushdecl (build_decl (TYPE_DECL, get_identifier ("__int128_t"), intTI_type_node));
6110 pushdecl (build_decl (TYPE_DECL, NULL_TREE, unsigned_intQI_type_node));
6111 pushdecl (build_decl (TYPE_DECL, NULL_TREE, unsigned_intHI_type_node));
6112 pushdecl (build_decl (TYPE_DECL, NULL_TREE, unsigned_intSI_type_node));
6113 pushdecl (build_decl (TYPE_DECL, NULL_TREE, unsigned_intDI_type_node));
6114 #if HOST_BITS_PER_WIDE_INT >= 64
6115 pushdecl (build_decl (TYPE_DECL, get_identifier ("__uint128_t"), unsigned_intTI_type_node));
6118 build_common_tree_nodes_2 (flag_short_double);
6120 java_byte_type_node = record_builtin_java_type ("__java_byte", 8);
6121 java_short_type_node = record_builtin_java_type ("__java_short", 16);
6122 java_int_type_node = record_builtin_java_type ("__java_int", 32);
6123 java_long_type_node = record_builtin_java_type ("__java_long", 64);
6124 java_float_type_node = record_builtin_java_type ("__java_float", -32);
6125 java_double_type_node = record_builtin_java_type ("__java_double", -64);
6126 java_char_type_node = record_builtin_java_type ("__java_char", -16);
6127 java_boolean_type_node = record_builtin_java_type ("__java_boolean", -1);
6129 integer_two_node = build_int_2 (2, 0);
6130 TREE_TYPE (integer_two_node) = integer_type_node;
6131 integer_three_node = build_int_2 (3, 0);
6132 TREE_TYPE (integer_three_node) = integer_type_node;
6134 boolean_type_node = make_unsigned_type (BOOL_TYPE_SIZE);
6135 TREE_SET_CODE (boolean_type_node, BOOLEAN_TYPE);
6136 TYPE_MAX_VALUE (boolean_type_node) = build_int_2 (1, 0);
6137 TREE_TYPE (TYPE_MAX_VALUE (boolean_type_node)) = boolean_type_node;
6138 TYPE_PRECISION (boolean_type_node) = 1;
6139 record_builtin_type (RID_BOOL, "bool", boolean_type_node);
6140 boolean_false_node = build_int_2 (0, 0);
6141 TREE_TYPE (boolean_false_node) = boolean_type_node;
6142 boolean_true_node = build_int_2 (1, 0);
6143 TREE_TYPE (boolean_true_node) = boolean_type_node;
6145 signed_size_zero_node = build_int_2 (0, 0); record_builtin_type (RID_FLOAT, NULL_PTR, float_type_node);
6146 record_builtin_type (RID_DOUBLE, NULL_PTR, double_type_node);
6147 record_builtin_type (RID_MAX, "long double", long_double_type_node);
6149 pushdecl (build_decl (TYPE_DECL, get_identifier ("complex int"),
6150 complex_integer_type_node));
6151 pushdecl (build_decl (TYPE_DECL, get_identifier ("complex float"),
6152 complex_float_type_node));
6153 pushdecl (build_decl (TYPE_DECL, get_identifier ("complex double"),
6154 complex_double_type_node));
6155 pushdecl (build_decl (TYPE_DECL, get_identifier ("complex long double"),
6156 complex_long_double_type_node));
6158 TREE_TYPE (signed_size_zero_node) = make_signed_type (TYPE_PRECISION (sizetype));
6160 record_builtin_type (RID_VOID, NULL_PTR, void_type_node);
6161 void_list_node = build_tree_list (NULL_TREE, void_type_node);
6162 TREE_PARMLIST (void_list_node) = 1;
6164 /* Used for expressions that do nothing, but are not errors. */
6165 void_zero_node = build_int_2 (0, 0);
6166 TREE_TYPE (void_zero_node) = void_type_node;
6168 string_type_node = build_pointer_type (char_type_node);
6169 const_string_type_node
6170 = build_pointer_type (build_qualified_type (char_type_node,
6172 empty_except_spec = build_tree_list (NULL_TREE, NULL_TREE);
6174 record_builtin_type (RID_MAX, NULL_PTR, string_type_node);
6177 /* Make a type to be the domain of a few array types
6178 whose domains don't really matter.
6179 200 is small enough that it always fits in size_t
6180 and large enough that it can hold most function names for the
6181 initializations of __FUNCTION__ and __PRETTY_FUNCTION__. */
6182 array_domain_type = build_index_type (build_int_2 (200, 0));
6184 /* Make a type for arrays of characters.
6185 With luck nothing will ever really depend on the length of this
6187 char_array_type_node
6188 = build_array_type (char_type_node, array_domain_type);
6189 /* Likewise for arrays of ints. */
6191 = build_array_type (integer_type_node, array_domain_type);
6193 /* This is just some anonymous class type. Nobody should ever
6194 need to look inside this envelope. */
6195 class_star_type_node = build_pointer_type (make_lang_type (RECORD_TYPE));
6197 if (flag_huge_objects)
6198 delta_type_node = long_integer_type_node;
6200 delta_type_node = short_integer_type_node;
6202 default_function_type
6203 = build_function_type (integer_type_node, NULL_TREE);
6205 ptr_type_node = build_pointer_type (void_type_node);
6207 = build_pointer_type (build_qualified_type (void_type_node,
6209 c_common_nodes_and_builtins (1, flag_no_builtin, flag_no_nonansi_builtin);
6212 = build_exception_variant (void_ftype_ptr, empty_except_spec);
6214 /* C++ extensions */
6216 unknown_type_node = make_node (UNKNOWN_TYPE);
6217 record_unknown_type (unknown_type_node, "unknown type");
6219 /* Indirecting an UNKNOWN_TYPE node yields an UNKNOWN_TYPE node. */
6220 TREE_TYPE (unknown_type_node) = unknown_type_node;
6222 TREE_TYPE (null_node) = type_for_size (POINTER_SIZE, 0);
6224 /* Looking up TYPE_POINTER_TO and TYPE_REFERENCE_TO yield the same
6226 TYPE_POINTER_TO (unknown_type_node) = unknown_type_node;
6227 TYPE_REFERENCE_TO (unknown_type_node) = unknown_type_node;
6229 /* This is special for C++ so functions can be overloaded. */
6230 wchar_type_node = get_identifier (flag_short_wchar
6231 ? "short unsigned int"
6233 wchar_type_node = TREE_TYPE (IDENTIFIER_GLOBAL_VALUE (wchar_type_node));
6234 wchar_type_size = TYPE_PRECISION (wchar_type_node);
6235 signed_wchar_type_node = make_signed_type (wchar_type_size);
6236 unsigned_wchar_type_node = make_unsigned_type (wchar_type_size);
6238 = TREE_UNSIGNED (wchar_type_node)
6239 ? unsigned_wchar_type_node
6240 : signed_wchar_type_node;
6241 record_builtin_type (RID_WCHAR, "__wchar_t", wchar_type_node);
6243 /* Artificial declaration of wchar_t -- can be bashed */
6244 wchar_decl_node = build_decl (TYPE_DECL, get_identifier ("wchar_t"),
6246 pushdecl (wchar_decl_node);
6248 /* This is for wide string constants. */
6249 wchar_array_type_node
6250 = build_array_type (wchar_type_node, array_domain_type);
6252 if (flag_vtable_thunks)
6254 /* Make sure we get a unique function type, so we can give
6255 its pointer type a name. (This wins for gdb.) */
6256 tree vfunc_type = make_node (FUNCTION_TYPE);
6257 TREE_TYPE (vfunc_type) = integer_type_node;
6258 TYPE_ARG_TYPES (vfunc_type) = NULL_TREE;
6259 layout_type (vfunc_type);
6261 vtable_entry_type = build_pointer_type (vfunc_type);
6265 vtable_entry_type = make_lang_type (RECORD_TYPE);
6266 fields[0] = build_lang_decl (FIELD_DECL, delta_identifier,
6268 fields[1] = build_lang_decl (FIELD_DECL, index_identifier,
6270 fields[2] = build_lang_decl (FIELD_DECL, pfn_identifier,
6272 finish_builtin_type (vtable_entry_type, VTBL_PTR_TYPE, fields, 2,
6275 /* Make this part of an invisible union. */
6276 fields[3] = copy_node (fields[2]);
6277 TREE_TYPE (fields[3]) = delta_type_node;
6278 DECL_NAME (fields[3]) = delta2_identifier;
6279 DECL_MODE (fields[3]) = TYPE_MODE (delta_type_node);
6280 DECL_SIZE (fields[3]) = TYPE_SIZE (delta_type_node);
6281 TREE_UNSIGNED (fields[3]) = 0;
6282 TREE_CHAIN (fields[2]) = fields[3];
6283 vtable_entry_type = build_qualified_type (vtable_entry_type,
6286 record_builtin_type (RID_MAX, VTBL_PTR_TYPE, vtable_entry_type);
6289 = build_cplus_array_type (vtable_entry_type, NULL_TREE);
6290 layout_type (vtbl_type_node);
6291 vtbl_type_node = build_qualified_type (vtbl_type_node, TYPE_QUAL_CONST);
6292 record_builtin_type (RID_MAX, NULL_PTR, vtbl_type_node);
6293 vtbl_ptr_type_node = build_pointer_type (vtable_entry_type);
6294 layout_type (vtbl_ptr_type_node);
6295 record_builtin_type (RID_MAX, NULL_PTR, vtbl_ptr_type_node);
6297 std_node = build_decl (NAMESPACE_DECL,
6298 get_identifier (flag_honor_std ? "fake std":"std"),
6300 pushdecl (std_node);
6302 global_type_node = make_node (LANG_TYPE);
6303 record_unknown_type (global_type_node, "global type");
6306 current_lang_name = lang_name_cplusplus;
6309 tree bad_alloc_type_node, newtype, deltype;
6311 push_namespace (get_identifier ("std"));
6312 bad_alloc_type_node = xref_tag
6313 (class_type_node, get_identifier ("bad_alloc"), 1);
6316 newtype = build_exception_variant
6317 (ptr_ftype_sizetype, add_exception_specifier (NULL_TREE, bad_alloc_type_node, -1));
6318 deltype = build_exception_variant (void_ftype_ptr, empty_except_spec);
6319 auto_function (ansi_opname[(int) NEW_EXPR], newtype);
6320 auto_function (ansi_opname[(int) VEC_NEW_EXPR], newtype);
6321 global_delete_fndecl = auto_function (ansi_opname[(int) DELETE_EXPR],
6323 auto_function (ansi_opname[(int) VEC_DELETE_EXPR], deltype);
6327 = define_function ("__pure_virtual", void_ftype, 0, 0);
6329 /* Perform other language dependent initializations. */
6330 init_class_processing ();
6331 init_init_processing ();
6332 init_search_processing ();
6333 init_rtti_processing ();
6335 if (flag_exceptions)
6336 init_exception_processing ();
6339 flag_inline_functions = 0;
6342 if (! supports_one_only ())
6345 /* Create the global bindings for __FUNCTION__ and __PRETTY_FUNCTION__. */
6346 declare_function_name ();
6348 /* Prepare to check format strings against argument lists. */
6349 init_function_format_info ();
6351 /* Show we use EH for cleanups. */
6352 using_eh_for_cleanups ();
6354 print_error_function = lang_print_error_function;
6355 lang_get_alias_set = &c_get_alias_set;
6356 valid_lang_attribute = cp_valid_lang_attribute;
6358 /* Maintain consistency. Perhaps we should just complain if they
6359 say -fwritable-strings? */
6360 if (flag_writable_strings)
6361 flag_const_strings = 0;
6363 /* Add GC roots for all of our global variables. */
6364 ggc_add_tree_root (c_global_trees, sizeof c_global_trees / sizeof(tree));
6365 ggc_add_tree_root (cp_global_trees, sizeof cp_global_trees / sizeof(tree));
6366 ggc_add_tree_root (&integer_three_node, 1);
6367 ggc_add_tree_root (&integer_two_node, 1);
6368 ggc_add_tree_root (&signed_size_zero_node, 1);
6369 ggc_add_tree_root (&size_one_node, 1);
6370 ggc_add_tree_root (&size_zero_node, 1);
6371 ggc_add_root (&global_binding_level, 1, sizeof global_binding_level,
6372 mark_binding_level);
6373 ggc_add_root (&scope_chain, 1, sizeof scope_chain, &mark_saved_scope);
6374 ggc_add_tree_root (&static_ctors, 1);
6375 ggc_add_tree_root (&static_dtors, 1);
6376 ggc_add_tree_root (&lastiddecl, 1);
6378 ggc_add_tree_root (&enum_next_value, 1);
6379 ggc_add_tree_root (&last_function_parm_tags, 1);
6380 ggc_add_tree_root (¤t_function_return_value, 1);
6381 ggc_add_tree_root (¤t_function_parms, 1);
6382 ggc_add_tree_root (¤t_function_parm_tags, 1);
6383 ggc_add_tree_root (&last_function_parms, 1);
6384 ggc_add_tree_root (&error_mark_list, 1);
6386 ggc_add_tree_root (&global_namespace, 1);
6387 ggc_add_tree_root (&global_type_node, 1);
6388 ggc_add_tree_root (&anonymous_namespace_name, 1);
6390 ggc_add_tree_root (&got_object, 1);
6391 ggc_add_tree_root (&got_scope, 1);
6393 ggc_add_tree_root (¤t_lang_name, 1);
6394 ggc_add_tree_root (&static_aggregates, 1);
6397 /* Function to print any language-specific context for an error message. */
6400 lang_print_error_function (file)
6403 default_print_error_function (file);
6404 maybe_print_template_context ();
6407 /* Make a definition for a builtin function named NAME and whose data type
6408 is TYPE. TYPE should be a function type with argument types.
6410 If LIBRARY_NAME is nonzero, use that for DECL_ASSEMBLER_NAME,
6411 the name to be called if we can't opencode the function. */
6414 define_function (name, type, pfn, library_name)
6417 void (*pfn) PROTO((tree));
6418 const char *library_name;
6420 tree decl = build_lang_decl (FUNCTION_DECL, get_identifier (name), type);
6421 DECL_EXTERNAL (decl) = 1;
6422 TREE_PUBLIC (decl) = 1;
6423 DECL_ARTIFICIAL (decl) = 1;
6425 my_friendly_assert (DECL_CONTEXT (decl) == NULL_TREE, 392);
6426 DECL_CONTEXT (decl) = FROB_CONTEXT (current_namespace);
6428 /* Since `pushdecl' relies on DECL_ASSEMBLER_NAME instead of DECL_NAME,
6429 we cannot change DECL_ASSEMBLER_NAME until we have installed this
6430 function in the namespace. */
6431 if (pfn) (*pfn) (decl);
6433 DECL_ASSEMBLER_NAME (decl) = get_identifier (library_name);
6434 make_function_rtl (decl);
6439 /* Wrapper around define_function, for the benefit of
6440 c_common_nodes_and_builtins.
6441 FUNCTION_CODE tells later passes how to compile calls to this function.
6442 See tree.h for its possible values. */
6445 builtin_function (name, type, code, class, libname)
6449 enum built_in_class class;
6450 const char *libname;
6452 tree decl = define_function (name, type, (void (*) PROTO((tree)))pushdecl,
6454 DECL_BUILT_IN_CLASS (decl) = class;
6455 DECL_FUNCTION_CODE (decl) = code;
6459 /* When we call finish_struct for an anonymous union, we create
6460 default copy constructors and such. But, an anonymous union
6461 shouldn't have such things; this function undoes the damage to the
6462 anonymous union type T.
6464 (The reason that we create the synthesized methods is that we don't
6465 distinguish `union { int i; }' from `typedef union { int i; } U'.
6466 The first is an anonymous union; the second is just an ordinary
6470 fixup_anonymous_aggr (t)
6475 /* Wipe out memory of synthesized methods */
6476 TYPE_HAS_CONSTRUCTOR (t) = 0;
6477 TYPE_HAS_DEFAULT_CONSTRUCTOR (t) = 0;
6478 TYPE_HAS_INIT_REF (t) = 0;
6479 TYPE_HAS_CONST_INIT_REF (t) = 0;
6480 TYPE_HAS_ASSIGN_REF (t) = 0;
6481 TYPE_HAS_CONST_ASSIGN_REF (t) = 0;
6483 /* Splice the implicitly generated functions out of the TYPE_METHODS
6485 q = &TYPE_METHODS (t);
6488 if (DECL_ARTIFICIAL (*q))
6489 *q = TREE_CHAIN (*q);
6491 q = &TREE_CHAIN (*q);
6494 /* ANSI C++ June 5 1992 WP 9.5.3. Anonymous unions may not have
6495 function members. */
6496 if (TYPE_METHODS (t))
6497 error ("an anonymous union cannot have function members");
6500 /* Make sure that a declaration with no declarator is well-formed, i.e.
6501 just defines a tagged type or anonymous union.
6503 Returns the type defined, if any. */
6506 check_tag_decl (declspecs)
6510 tree ob_modifier = NULL_TREE;
6512 register tree t = NULL_TREE;
6514 for (link = declspecs; link; link = TREE_CHAIN (link))
6516 register tree value = TREE_VALUE (link);
6522 if (IS_AGGR_TYPE (value) || TREE_CODE (value) == ENUMERAL_TYPE)
6524 my_friendly_assert (TYPE_MAIN_DECL (value) != NULL_TREE, 261);
6528 else if (value == ridpointers[(int) RID_FRIEND])
6530 if (current_class_type == NULL_TREE
6531 || current_scope () != current_class_type)
6532 ob_modifier = value;
6534 else if (value == ridpointers[(int) RID_STATIC]
6535 || value == ridpointers[(int) RID_EXTERN]
6536 || value == ridpointers[(int) RID_AUTO]
6537 || value == ridpointers[(int) RID_REGISTER]
6538 || value == ridpointers[(int) RID_INLINE]
6539 || value == ridpointers[(int) RID_VIRTUAL]
6540 || value == ridpointers[(int) RID_CONST]
6541 || value == ridpointers[(int) RID_VOLATILE]
6542 || value == ridpointers[(int) RID_EXPLICIT])
6543 ob_modifier = value;
6547 error ("multiple types in one declaration");
6549 /* Inside a class, we might be in a friend or access declaration.
6550 Until we have a good way of detecting the latter, don't warn. */
6551 if (t == NULL_TREE && ! current_class_type)
6552 pedwarn ("declaration does not declare anything");
6554 /* Check for an anonymous union. We're careful
6555 accessing TYPE_IDENTIFIER because some built-in types, like
6556 pointer-to-member types, do not have TYPE_NAME. */
6557 else if (t && IS_AGGR_TYPE_CODE (TREE_CODE (t))
6559 && ANON_AGGRNAME_P (TYPE_IDENTIFIER (t)))
6561 /* Anonymous unions are objects, so they can have specifiers. */;
6562 SET_ANON_AGGR_TYPE_P (t);
6564 if (TREE_CODE (t) != UNION_TYPE && pedantic && ! in_system_header)
6565 pedwarn ("ISO C++ prohibits anonymous structs");
6568 else if (ob_modifier)
6570 if (ob_modifier == ridpointers[(int) RID_INLINE]
6571 || ob_modifier == ridpointers[(int) RID_VIRTUAL])
6572 cp_error ("`%D' can only be specified for functions", ob_modifier);
6573 else if (ob_modifier == ridpointers[(int) RID_FRIEND])
6574 cp_error ("`%D' can only be specified inside a class", ob_modifier);
6575 else if (ob_modifier == ridpointers[(int) RID_EXPLICIT])
6576 cp_error ("`%D' can only be specified for constructors",
6579 cp_error ("`%D' can only be specified for objects and functions",
6586 /* Called when a declaration is seen that contains no names to declare.
6587 If its type is a reference to a structure, union or enum inherited
6588 from a containing scope, shadow that tag name for the current scope
6589 with a forward reference.
6590 If its type defines a new named structure or union
6591 or defines an enum, it is valid but we need not do anything here.
6592 Otherwise, it is an error.
6594 C++: may have to grok the declspecs to learn about static,
6595 complain for anonymous unions. */
6598 shadow_tag (declspecs)
6601 tree t = check_tag_decl (declspecs);
6604 maybe_process_partial_specialization (t);
6606 /* This is where the variables in an anonymous union are
6607 declared. An anonymous union declaration looks like:
6609 because there is no declarator after the union, the parser
6610 sends that declaration here. */
6611 if (t && ANON_AGGR_TYPE_P (t))
6613 fixup_anonymous_aggr (t);
6615 if (TYPE_FIELDS (t))
6617 tree decl = grokdeclarator (NULL_TREE, declspecs, NORMAL, 0,
6619 finish_anon_union (decl);
6624 /* Decode a "typename", such as "int **", returning a ..._TYPE node. */
6627 groktypename (typename)
6630 if (TREE_CODE (typename) != TREE_LIST)
6632 return grokdeclarator (TREE_VALUE (typename),
6633 TREE_PURPOSE (typename),
6634 TYPENAME, 0, NULL_TREE);
6637 /* Decode a declarator in an ordinary declaration or data definition.
6638 This is called as soon as the type information and variable name
6639 have been parsed, before parsing the initializer if any.
6640 Here we create the ..._DECL node, fill in its type,
6641 and put it on the list of decls for the current context.
6642 The ..._DECL node is returned as the value.
6644 Exception: for arrays where the length is not specified,
6645 the type is left null, to be filled in by `cp_finish_decl'.
6647 Function definitions do not come here; they go to start_function
6648 instead. However, external and forward declarations of functions
6649 do go through here. Structure field declarations are done by
6650 grokfield and not through here. */
6652 /* Set this to zero to debug not using the temporary obstack
6653 to parse initializers. */
6654 int debug_temp_inits = 1;
6657 start_decl (declarator, declspecs, initialized, attributes, prefix_attributes)
6658 tree declarator, declspecs;
6660 tree attributes, prefix_attributes;
6663 register tree type, tem;
6665 extern int have_extern_spec;
6666 extern int used_extern_spec;
6670 /* See code below that used this. */
6671 int init_written = initialized;
6674 /* This should only be done once on the top most decl. */
6675 if (have_extern_spec && !used_extern_spec)
6677 declspecs = decl_tree_cons (NULL_TREE, get_identifier ("extern"),
6679 used_extern_spec = 1;
6682 if (attributes || prefix_attributes)
6683 attrlist = build_scratch_list (attributes, prefix_attributes);
6685 attrlist = NULL_TREE;
6687 decl = grokdeclarator (declarator, declspecs, NORMAL, initialized,
6690 if (decl == NULL_TREE || TREE_CODE (decl) == VOID_TYPE)
6693 type = TREE_TYPE (decl);
6695 if (type == error_mark_node)
6699 = (TREE_CODE (decl) == FUNCTION_DECL && DECL_VIRTUAL_P (decl))
6700 ? DECL_CLASS_CONTEXT (decl)
6701 : DECL_CONTEXT (decl);
6703 if (initialized && context && TREE_CODE (context) == NAMESPACE_DECL
6704 && context != current_namespace && TREE_CODE (decl) == VAR_DECL)
6706 /* When parsing the initializer, lookup should use the object's
6708 push_decl_namespace (context);
6711 /* We are only interested in class contexts, later. */
6712 if (context && TREE_CODE (context) == NAMESPACE_DECL)
6713 context = NULL_TREE;
6716 /* Is it valid for this decl to have an initializer at all?
6717 If not, set INITIALIZED to zero, which will indirectly
6718 tell `cp_finish_decl' to ignore the initializer once it is parsed. */
6719 switch (TREE_CODE (decl))
6722 /* typedef foo = bar means give foo the same type as bar.
6723 We haven't parsed bar yet, so `cp_finish_decl' will fix that up.
6724 Any other case of an initialization in a TYPE_DECL is an error. */
6725 if (pedantic || list_length (declspecs) > 1)
6727 cp_error ("typedef `%D' is initialized", decl);
6733 cp_error ("function `%#D' is initialized like a variable", decl);
6743 if (! toplevel_bindings_p ()
6744 && DECL_EXTERNAL (decl))
6745 cp_warning ("declaration of `%#D' has `extern' and is initialized",
6747 DECL_EXTERNAL (decl) = 0;
6748 if (toplevel_bindings_p ())
6749 TREE_STATIC (decl) = 1;
6751 /* Tell `pushdecl' this is an initialized decl
6752 even though we don't yet have the initializer expression.
6753 Also tell `cp_finish_decl' it may store the real initializer. */
6754 DECL_INITIAL (decl) = error_mark_node;
6757 #ifdef SET_DEFAULT_DECL_ATTRIBUTES
6758 SET_DEFAULT_DECL_ATTRIBUTES (decl, attributes);
6761 /* Set attributes here so if duplicate decl, will have proper attributes. */
6762 cplus_decl_attributes (decl, attributes, prefix_attributes);
6764 if (context && TYPE_SIZE (complete_type (context)) != NULL_TREE)
6766 push_nested_class (context, 2);
6768 if (TREE_CODE (decl) == VAR_DECL)
6770 tree field = lookup_field (context, DECL_NAME (decl), 0, 0);
6771 if (field == NULL_TREE || TREE_CODE (field) != VAR_DECL)
6772 cp_error ("`%#D' is not a static member of `%#T'", decl, context);
6775 if (DECL_CONTEXT (field) != context)
6777 cp_pedwarn ("ANSI C++ does not permit `%T::%D' to be defined as `%T::%D'",
6778 DECL_CONTEXT (field), DECL_NAME (decl),
6779 context, DECL_NAME (decl));
6780 DECL_CONTEXT (decl) = DECL_CONTEXT (field);
6782 /* Static data member are tricky; an in-class initialization
6783 still doesn't provide a definition, so the in-class
6784 declaration will have DECL_EXTERNAL set, but will have an
6785 initialization. Thus, duplicate_decls won't warn
6786 about this situation, and so we check here. */
6787 if (DECL_INITIAL (decl) && DECL_INITIAL (field))
6788 cp_error ("duplicate initialization of %D", decl);
6789 if (duplicate_decls (decl, field))
6795 tree field = check_classfn (context, decl);
6796 if (field && duplicate_decls (decl, field))
6800 /* cp_finish_decl sets DECL_EXTERNAL if DECL_IN_AGGR_P is set. */
6801 DECL_IN_AGGR_P (decl) = 0;
6802 if ((DECL_LANG_SPECIFIC (decl) && DECL_USE_TEMPLATE (decl))
6803 || CLASSTYPE_USE_TEMPLATE (context))
6805 SET_DECL_TEMPLATE_SPECIALIZATION (decl);
6806 /* [temp.expl.spec] An explicit specialization of a static data
6807 member of a template is a definition if the declaration
6808 includes an initializer; otherwise, it is a declaration.
6810 We check for processing_specialization so this only applies
6811 to the new specialization syntax. */
6812 if (DECL_INITIAL (decl) == NULL_TREE && processing_specialization)
6813 DECL_EXTERNAL (decl) = 1;
6816 if (DECL_EXTERNAL (decl) && ! DECL_TEMPLATE_SPECIALIZATION (decl))
6817 cp_pedwarn ("declaration of `%#D' outside of class is not definition",
6821 /* Enter this declaration into the symbol table. */
6822 tem = maybe_push_decl (decl);
6824 if (processing_template_decl)
6826 if (at_function_scope_p ())
6827 push_permanent_obstack ();
6828 tem = push_template_decl (tem);
6829 if (at_function_scope_p ())
6834 #if ! defined (ASM_OUTPUT_BSS) && ! defined (ASM_OUTPUT_ALIGNED_BSS)
6835 /* Tell the back-end to use or not use .common as appropriate. If we say
6836 -fconserve-space, we want this to save .data space, at the expense of
6837 wrong semantics. If we say -fno-conserve-space, we want this to
6838 produce errors about redefs; to do this we force variables into the
6840 DECL_COMMON (tem) = flag_conserve_space || ! TREE_PUBLIC (tem);
6843 if (! processing_template_decl)
6846 /* Corresponding pop_obstacks is done in `cp_finish_decl'. */
6847 push_obstacks_nochange ();
6856 tree type = TREE_TYPE (decl);
6857 int initialized = (DECL_INITIAL (decl) != NULL_TREE);
6859 if (type == error_mark_node)
6862 /* If this type of object needs a cleanup, and control may
6863 jump past it, make a new binding level so that it is cleaned
6864 up only when it is initialized first. */
6865 if (TYPE_NEEDS_DESTRUCTOR (type)
6866 && current_binding_level->more_cleanups_ok == 0)
6867 pushlevel_temporary (1);
6870 /* Is it valid for this decl to have an initializer at all?
6871 If not, set INITIALIZED to zero, which will indirectly
6872 tell `cp_finish_decl' to ignore the initializer once it is parsed. */
6874 /* Don't allow initializations for incomplete types except for
6875 arrays which might be completed by the initialization. */
6876 if (TYPE_SIZE (complete_type (type)) != NULL_TREE)
6877 ; /* A complete type is ok. */
6878 else if (TREE_CODE (type) != ARRAY_TYPE)
6880 cp_error ("variable `%#D' has initializer but incomplete type",
6883 type = TREE_TYPE (decl) = error_mark_node;
6885 else if (TYPE_SIZE (complete_type (TREE_TYPE (type))) == NULL_TREE)
6887 if (DECL_LANG_SPECIFIC (decl) && DECL_TEMPLATE_INFO (decl))
6888 cp_error ("elements of array `%#D' have incomplete type", decl);
6889 /* else we already gave an error in start_decl. */
6895 && TREE_CODE (decl) != TYPE_DECL
6896 && TREE_CODE (decl) != TEMPLATE_DECL
6897 && IS_AGGR_TYPE (type) && ! DECL_EXTERNAL (decl))
6899 if ((! processing_template_decl || ! uses_template_parms (type))
6900 && TYPE_SIZE (complete_type (type)) == NULL_TREE)
6902 cp_error ("aggregate `%#D' has incomplete type and cannot be initialized",
6904 /* Change the type so that assemble_variable will give
6905 DECL an rtl we can live with: (mem (const_int 0)). */
6906 type = TREE_TYPE (decl) = error_mark_node;
6910 /* If any base type in the hierarchy of TYPE needs a constructor,
6911 then we set initialized to 1. This way any nodes which are
6912 created for the purposes of initializing this aggregate
6913 will live as long as it does. This is necessary for global
6914 aggregates which do not have their initializers processed until
6915 the end of the file. */
6916 initialized = TYPE_NEEDS_CONSTRUCTING (type);
6921 DECL_INITIAL (decl) = NULL_TREE;
6924 /* Handle initialization of references.
6925 These three arguments are from `cp_finish_decl', and have the
6926 same meaning here that they do there.
6928 Quotes on semantics can be found in ARM 8.4.3. */
6931 grok_reference_init (decl, type, init)
6932 tree decl, type, init;
6936 if (init == NULL_TREE)
6938 if ((DECL_LANG_SPECIFIC (decl) == 0
6939 || DECL_IN_AGGR_P (decl) == 0)
6940 && ! DECL_THIS_EXTERN (decl))
6941 cp_error ("`%D' declared as reference but not initialized", decl);
6945 if (init == error_mark_node)
6948 if (TREE_CODE (init) == CONSTRUCTOR)
6950 cp_error ("ANSI C++ forbids use of initializer list to initialize reference `%D'", decl);
6954 if (TREE_CODE (init) == TREE_LIST)
6955 init = build_compound_expr (init);
6957 if (TREE_CODE (TREE_TYPE (init)) == REFERENCE_TYPE)
6958 init = convert_from_reference (init);
6960 if (TREE_CODE (TREE_TYPE (type)) != ARRAY_TYPE
6961 && TREE_CODE (TREE_TYPE (init)) == ARRAY_TYPE)
6963 /* Note: default conversion is only called in very special cases. */
6964 init = default_conversion (init);
6967 /* Convert INIT to the reference type TYPE. This may involve the
6968 creation of a temporary, whose lifetime must be the same as that
6969 of the reference. If so, a DECL_STMT for the temporary will be
6970 added just after the DECL_STMT for DECL. That's why we don't set
6971 DECL_INITIAL for local references (instead assigning to them
6972 explicitly); we need to allow the temporary to be initialized
6974 tmp = convert_to_reference
6975 (type, init, CONV_IMPLICIT,
6976 LOOKUP_SPECULATIVELY|LOOKUP_NORMAL|DIRECT_BIND, decl);
6978 if (tmp == error_mark_node)
6980 else if (tmp != NULL_TREE)
6983 tmp = save_expr (tmp);
6984 if (building_stmt_tree ())
6986 /* Initialize the declaration. */
6987 tmp = build (INIT_EXPR, TREE_TYPE (decl), decl, tmp);
6988 /* Setting TREE_SIDE_EFFECTS prevents expand_expr from
6989 omitting this expression entirely. */
6990 TREE_SIDE_EFFECTS (tmp) = 1;
6991 finish_expr_stmt (tmp);
6994 DECL_INITIAL (decl) = tmp;
6998 cp_error ("cannot initialize `%T' from `%T'", type, TREE_TYPE (init));
7002 if (TREE_STATIC (decl) && ! TREE_CONSTANT (DECL_INITIAL (decl)))
7004 expand_static_init (decl, DECL_INITIAL (decl));
7005 DECL_INITIAL (decl) = NULL_TREE;
7010 /* Fill in DECL_INITIAL with some magical value to prevent expand_decl from
7011 mucking with forces it does not comprehend (i.e. initialization with a
7012 constructor). If we are at global scope and won't go into COMMON, fill
7013 it in with a dummy CONSTRUCTOR to force the variable into .data;
7014 otherwise we can use error_mark_node. */
7017 obscure_complex_init (decl, init)
7020 if (! flag_no_inline && TREE_STATIC (decl))
7022 if (extract_init (decl, init))
7026 #if ! defined (ASM_OUTPUT_BSS) && ! defined (ASM_OUTPUT_ALIGNED_BSS)
7027 if (toplevel_bindings_p () && ! DECL_COMMON (decl))
7028 DECL_INITIAL (decl) = build (CONSTRUCTOR, TREE_TYPE (decl), NULL_TREE,
7032 DECL_INITIAL (decl) = error_mark_node;
7037 /* When parsing `int a[] = {1, 2};' we don't know the size of the
7038 array until we finish parsing the initializer. If that's the
7039 situation we're in, update DECL accordingly. */
7042 maybe_deduce_size_from_array_init (decl, init)
7046 tree type = TREE_TYPE (decl);
7048 if (TREE_CODE (type) == ARRAY_TYPE
7049 && TYPE_DOMAIN (type) == NULL_TREE
7050 && TREE_CODE (decl) != TYPE_DECL)
7053 = (TREE_STATIC (decl)
7054 /* Even if pedantic, an external linkage array
7055 may have incomplete type at first. */
7056 ? pedantic && ! DECL_EXTERNAL (decl)
7057 : !DECL_EXTERNAL (decl));
7058 tree initializer = init ? init : DECL_INITIAL (decl);
7059 int failure = complete_array_type (type, initializer, do_default);
7062 cp_error ("initializer fails to determine size of `%D'", decl);
7067 cp_error ("array size missing in `%D'", decl);
7068 /* If a `static' var's size isn't known, make it extern as
7069 well as static, so it does not get allocated. If it's not
7070 `static', then don't mark it extern; finish_incomplete_decl
7071 will give it a default size and it will get allocated. */
7072 else if (!pedantic && TREE_STATIC (decl) && !TREE_PUBLIC (decl))
7073 DECL_EXTERNAL (decl) = 1;
7076 if (pedantic && TYPE_DOMAIN (type) != NULL_TREE
7077 && tree_int_cst_lt (TYPE_MAX_VALUE (TYPE_DOMAIN (type)),
7079 cp_error ("zero-size array `%D'", decl);
7081 layout_decl (decl, 0);
7085 /* Set DECL_SIZE, DECL_ALIGN, etc. for DECL (a VAR_DECL), and issue
7086 any appropriate error messages regarding the layout. */
7089 layout_var_decl (decl)
7092 tree type = TREE_TYPE (decl);
7093 tree ttype = target_type (type);
7095 /* If we haven't already layed out this declaration, do so now.
7096 Note that we must not call complete type for an external object
7097 because it's type might involve templates that we are not
7098 supposed to isntantiate yet. (And it's perfectly legal to say
7099 `extern X x' for some incomplete type `X'.) */
7100 if (!DECL_EXTERNAL (decl))
7101 complete_type (type);
7102 if (!DECL_SIZE (decl)&& TYPE_SIZE (type))
7103 layout_decl (decl, 0);
7105 if (!DECL_EXTERNAL (decl) && DECL_SIZE (decl) == NULL_TREE)
7107 /* An automatic variable with an incomplete type: that is an error.
7108 Don't talk about array types here, since we took care of that
7109 message in grokdeclarator. */
7110 cp_error ("storage size of `%D' isn't known", decl);
7111 TREE_TYPE (decl) = error_mark_node;
7113 else if (!DECL_EXTERNAL (decl) && IS_AGGR_TYPE (ttype))
7114 /* Let debugger know it should output info for this type. */
7115 note_debug_info_needed (ttype);
7117 if (TREE_STATIC (decl) && DECL_CLASS_SCOPE_P (decl))
7118 note_debug_info_needed (DECL_CONTEXT (decl));
7120 if ((DECL_EXTERNAL (decl) || TREE_STATIC (decl))
7121 && DECL_SIZE (decl) != NULL_TREE
7122 && ! TREE_CONSTANT (DECL_SIZE (decl)))
7124 if (TREE_CODE (DECL_SIZE (decl)) == INTEGER_CST)
7125 constant_expression_warning (DECL_SIZE (decl));
7127 cp_error ("storage size of `%D' isn't constant", decl);
7131 /* If a local static variable is declared in an inline function, or if
7132 we have a weak definition, we must endeavor to create only one
7133 instance of the variable at link-time. */
7136 maybe_commonize_var (decl)
7139 /* Static data in a function with comdat linkage also has comdat
7141 if (TREE_STATIC (decl)
7142 /* Don't mess with __FUNCTION__. */
7143 && ! TREE_ASM_WRITTEN (decl)
7144 && current_function_decl
7145 && DECL_CONTEXT (decl) == current_function_decl
7146 && (DECL_THIS_INLINE (current_function_decl)
7147 || DECL_TEMPLATE_INSTANTIATION (current_function_decl))
7148 && TREE_PUBLIC (current_function_decl))
7150 /* Rather than try to get this right with inlining, we suppress
7151 inlining of such functions. */
7152 current_function_cannot_inline
7153 = "function with static variable cannot be inline";
7155 /* If flag_weak, we don't need to mess with this, as we can just
7156 make the function weak, and let it refer to its unique local
7157 copy. This works because we don't allow the function to be
7161 if (DECL_INTERFACE_KNOWN (current_function_decl))
7163 TREE_PUBLIC (decl) = 1;
7164 DECL_EXTERNAL (decl) = DECL_EXTERNAL (current_function_decl);
7166 else if (DECL_INITIAL (decl) == NULL_TREE
7167 || DECL_INITIAL (decl) == error_mark_node)
7169 TREE_PUBLIC (decl) = 1;
7170 DECL_COMMON (decl) = 1;
7172 /* else we lose. We can only do this if we can use common,
7173 which we can't if it has been initialized. */
7175 if (TREE_PUBLIC (decl))
7176 DECL_ASSEMBLER_NAME (decl)
7177 = build_static_name (current_function_decl, DECL_NAME (decl));
7178 else if (! DECL_ARTIFICIAL (decl))
7180 cp_warning_at ("sorry: semantics of inline function static data `%#D' are wrong (you'll wind up with multiple copies)", decl);
7181 cp_warning_at (" you can work around this by removing the initializer", decl);
7185 else if (DECL_LANG_SPECIFIC (decl) && DECL_COMDAT (decl))
7186 /* Set it up again; we might have set DECL_INITIAL since the last
7188 comdat_linkage (decl);
7191 /* Issue an error message if DECL is an uninitialized const variable. */
7194 check_for_uninitialized_const_var (decl)
7197 tree type = TREE_TYPE (decl);
7199 /* ``Unless explicitly declared extern, a const object does not have
7200 external linkage and must be initialized. ($8.4; $12.1)'' ARM
7202 if (TREE_CODE (decl) == VAR_DECL
7203 && TREE_CODE (type) != REFERENCE_TYPE
7204 && CP_TYPE_CONST_P (type)
7205 && !TYPE_NEEDS_CONSTRUCTING (type)
7206 && !DECL_INITIAL (decl))
7207 cp_error ("uninitialized const `%D'", decl);
7210 /* Verify INIT (the initializer for DECL), and record the
7211 initialization in DECL_INITIAL, if appropriate. Returns a new
7215 check_initializer (decl, init)
7221 if (TREE_CODE (decl) == FIELD_DECL)
7224 type = TREE_TYPE (decl);
7226 /* If `start_decl' didn't like having an initialization, ignore it now. */
7227 if (init != NULL_TREE && DECL_INITIAL (decl) == NULL_TREE)
7230 /* Check the initializer. */
7233 /* Things that are going to be initialized need to have complete
7235 TREE_TYPE (decl) = type = complete_type (TREE_TYPE (decl));
7237 if (type == error_mark_node)
7238 /* We will have already complained. */
7240 else if (TYPE_SIZE (type) && !TREE_CONSTANT (TYPE_SIZE (type)))
7242 cp_error ("variable-sized object `%D' may not be initialized", decl);
7245 else if (TREE_CODE (type) == ARRAY_TYPE
7246 && !TYPE_SIZE (TREE_TYPE (type)))
7248 cp_error ("elements of array `%#D' have incomplete type", decl);
7251 else if (!TYPE_SIZE (type))
7253 cp_error ("`%D' has incomplete type", decl);
7254 TREE_TYPE (decl) = error_mark_node;
7259 if (TREE_CODE (decl) == CONST_DECL)
7261 my_friendly_assert (TREE_CODE (decl) != REFERENCE_TYPE, 148);
7263 DECL_INITIAL (decl) = init;
7265 /* This will keep us from needing to worry about our obstacks. */
7266 my_friendly_assert (init != NULL_TREE, 149);
7269 else if (!DECL_EXTERNAL (decl) && TREE_CODE (type) == REFERENCE_TYPE)
7271 if (TREE_STATIC (decl))
7272 make_decl_rtl (decl, NULL_PTR, toplevel_bindings_p ());
7273 grok_reference_init (decl, type, init);
7278 if (TYPE_HAS_CONSTRUCTOR (type) || TYPE_NEEDS_CONSTRUCTING (type))
7280 if (TREE_CODE (type) == ARRAY_TYPE)
7281 init = digest_init (type, init, (tree *) 0);
7282 else if (TREE_CODE (init) == CONSTRUCTOR
7283 && TREE_HAS_CONSTRUCTOR (init))
7285 if (TYPE_NON_AGGREGATE_CLASS (type))
7287 cp_error ("`%D' must be initialized by constructor, not by `{...}'",
7289 init = error_mark_node;
7292 goto dont_use_constructor;
7297 dont_use_constructor:
7298 if (TREE_CODE (init) != TREE_VEC)
7299 init = store_init_value (decl, init);
7303 /* We must hide the initializer so that expand_decl
7304 won't try to do something it does not understand. */
7305 init = obscure_complex_init (decl, init);
7307 else if (DECL_EXTERNAL (decl))
7309 else if (TREE_CODE_CLASS (TREE_CODE (type)) == 't'
7310 && (IS_AGGR_TYPE (type) || TYPE_NEEDS_CONSTRUCTING (type)))
7312 tree core_type = strip_array_types (type);
7314 if (! TYPE_NEEDS_CONSTRUCTING (core_type))
7316 if (CLASSTYPE_READONLY_FIELDS_NEED_INIT (core_type))
7317 cp_error ("structure `%D' with uninitialized const members", decl);
7318 if (CLASSTYPE_REF_FIELDS_NEED_INIT (core_type))
7319 cp_error ("structure `%D' with uninitialized reference members",
7323 check_for_uninitialized_const_var (decl);
7325 if (TYPE_SIZE (type) != NULL_TREE
7326 && TYPE_NEEDS_CONSTRUCTING (type))
7327 init = obscure_complex_init (decl, NULL_TREE);
7331 check_for_uninitialized_const_var (decl);
7336 /* If DECL is not a local variable, give it RTL. */
7339 make_rtl_for_nonlocal_decl (decl, init, asmspec)
7342 const char *asmspec;
7347 type = TREE_TYPE (decl);
7348 toplev = toplevel_bindings_p ();
7350 /* Handle non-variables up front. */
7351 if (TREE_CODE (decl) != VAR_DECL)
7353 rest_of_decl_compilation (decl, asmspec, toplev, at_eof);
7357 /* Set the DECL_ASSEMBLER_NAME for the variable. */
7359 DECL_ASSEMBLER_NAME (decl) = get_identifier (asmspec);
7361 if (DECL_VIRTUAL_P (decl))
7362 make_decl_rtl (decl, NULL_PTR, toplev);
7363 else if (TREE_READONLY (decl)
7364 && DECL_INITIAL (decl) != NULL_TREE
7365 && DECL_INITIAL (decl) != error_mark_node
7366 && ! EMPTY_CONSTRUCTOR_P (DECL_INITIAL (decl)))
7368 DECL_INITIAL (decl) = save_expr (DECL_INITIAL (decl));
7371 && TREE_STATIC (decl)
7372 && ! TREE_SIDE_EFFECTS (decl)
7373 && ! TREE_PUBLIC (decl)
7374 && ! DECL_EXTERNAL (decl)
7375 && ! TYPE_NEEDS_DESTRUCTOR (type)
7376 && DECL_MODE (decl) != BLKmode)
7378 /* If this variable is really a constant, then fill its DECL_RTL
7379 slot with something which won't take up storage.
7380 If something later should take its address, we can always give
7381 it legitimate RTL at that time. */
7382 DECL_RTL (decl) = gen_reg_rtx (DECL_MODE (decl));
7383 store_expr (DECL_INITIAL (decl), DECL_RTL (decl), 0);
7384 TREE_ASM_WRITTEN (decl) = 1;
7386 else if (toplev && ! TREE_PUBLIC (decl))
7388 /* If this is a static const, change its apparent linkage
7389 if it belongs to a #pragma interface. */
7390 if (!interface_unknown)
7392 TREE_PUBLIC (decl) = 1;
7393 DECL_EXTERNAL (decl) = interface_only;
7395 make_decl_rtl (decl, asmspec, toplev);
7398 rest_of_decl_compilation (decl, asmspec, toplev, at_eof);
7400 else if (DECL_LANG_SPECIFIC (decl) && DECL_IN_AGGR_P (decl))
7402 my_friendly_assert (TREE_STATIC (decl), 19990828);
7404 if (init == NULL_TREE
7405 #ifdef DEFAULT_STATIC_DEFS
7406 /* If this code is dead, then users must
7407 explicitly declare static member variables
7408 outside the class def'n as well. */
7409 && TYPE_NEEDS_CONSTRUCTING (type)
7413 DECL_EXTERNAL (decl) = 1;
7414 make_decl_rtl (decl, asmspec, 1);
7417 rest_of_decl_compilation (decl, asmspec, toplev, at_eof);
7419 else if (TREE_CODE (CP_DECL_CONTEXT (decl)) == NAMESPACE_DECL
7420 || (TREE_CODE (decl) == VAR_DECL && TREE_STATIC (decl)))
7421 rest_of_decl_compilation (decl, asmspec, toplev, at_eof);
7424 /* The old ARM scoping rules injected variables declared in the
7425 initialization statement of a for-statement into the surrounding
7426 scope. We support this usage, in order to be backward-compatible.
7427 DECL is a just-declared VAR_DECL; if necessary inject its
7428 declaration into the surrounding scope. */
7431 maybe_inject_for_scope_var (decl)
7434 if (current_binding_level->is_for_scope)
7436 struct binding_level *outer
7437 = current_binding_level->level_chain;
7439 /* Check to see if the same name is already bound at the outer
7440 level, either because it was directly declared, or because a
7441 dead for-decl got preserved. In either case, the code would
7442 not have been valid under the ARM scope rules, so clear
7443 is_for_scope for the current_binding_level.
7445 Otherwise, we need to preserve the temp slot for decl to last
7446 into the outer binding level. */
7449 = TREE_CHAIN (IDENTIFIER_BINDING (DECL_NAME (decl)));
7451 if (outer_binding && BINDING_LEVEL (outer_binding) == outer
7452 && (TREE_CODE (BINDING_VALUE (outer_binding))
7454 && DECL_DEAD_FOR_LOCAL (BINDING_VALUE (outer_binding)))
7456 BINDING_VALUE (outer_binding)
7457 = DECL_SHADOWED_FOR_VAR (BINDING_VALUE (outer_binding));
7458 current_binding_level->is_for_scope = 0;
7460 else if (DECL_IN_MEMORY_P (decl))
7461 preserve_temp_slots (DECL_RTL (decl));
7465 /* Generate code to initialize DECL (a local variable). */
7468 initialize_local_var (decl, init, flags)
7473 tree type = TREE_TYPE (decl);
7475 /* If the type is bogus, don't bother initializing the variable. */
7476 if (type == error_mark_node)
7479 if (DECL_SIZE (decl) == NULL_TREE && !TREE_STATIC (decl))
7481 /* If we used it already as memory, it must stay in memory. */
7482 DECL_INITIAL (decl) = NULL_TREE;
7483 TREE_ADDRESSABLE (decl) = TREE_USED (decl);
7486 /* Local statics are handled differently from ordinary automatic
7488 if (TREE_STATIC (decl))
7490 if (TYPE_NEEDS_CONSTRUCTING (type) || init != NULL_TREE
7491 || TYPE_NEEDS_DESTRUCTOR (type))
7492 expand_static_init (decl, init);
7496 if (DECL_SIZE (decl) && type != error_mark_node)
7500 /* Compute and store the initial value. */
7501 already_used = TREE_USED (decl) || TREE_USED (type);
7503 if (init || TYPE_NEEDS_CONSTRUCTING (type))
7505 int saved_stmts_are_full_exprs_p;
7507 emit_line_note (DECL_SOURCE_FILE (decl),
7508 DECL_SOURCE_LINE (decl));
7509 saved_stmts_are_full_exprs_p = stmts_are_full_exprs_p;
7510 stmts_are_full_exprs_p = 1;
7511 finish_expr_stmt (build_aggr_init (decl, init, flags));
7512 stmts_are_full_exprs_p = saved_stmts_are_full_exprs_p;
7515 /* Set this to 0 so we can tell whether an aggregate which was
7516 initialized was ever used. Don't do this if it has a
7517 destructor, so we don't complain about the 'resource
7518 allocation is initialization' idiom. Now set
7519 attribute((unused)) on types so decls of that type will be
7520 marked used. (see TREE_USED, above.) */
7521 if (TYPE_NEEDS_CONSTRUCTING (type)
7523 && !TYPE_NEEDS_DESTRUCTOR (type)
7524 && DECL_NAME (decl))
7525 TREE_USED (decl) = 0;
7526 else if (already_used)
7527 TREE_USED (decl) = 1;
7531 /* Generate code to destroy DECL (a local variable). */
7534 destroy_local_var (decl)
7537 tree type = TREE_TYPE (decl);
7540 /* Only variables get cleaned up. */
7541 if (TREE_CODE (decl) != VAR_DECL)
7544 /* And only things with destructors need cleaning up. */
7545 if (!TYPE_NEEDS_DESTRUCTOR (type))
7548 if (TREE_CODE (decl) == VAR_DECL &&
7549 (DECL_EXTERNAL (decl) || TREE_STATIC (decl)))
7550 /* We don't clean up things that aren't defined in this
7551 translation unit, or that need a static cleanup. The latter
7552 are handled by finish_file. */
7555 /* Compute the cleanup. */
7556 cleanup = maybe_build_cleanup (decl);
7558 /* Record the cleanup required for this declaration. */
7559 if (DECL_SIZE (decl) && TREE_TYPE (decl) != error_mark_node
7561 finish_decl_cleanup (decl, cleanup);
7564 /* Let the back-end know about DECL. */
7567 emit_local_var (decl)
7570 /* Create RTL for this variable. */
7571 if (DECL_RTL (decl))
7572 /* Only a RESULT_DECL should have non-NULL RTL when
7573 arriving here. All other local variables are
7574 assigned RTL in this function. */
7575 my_friendly_assert (TREE_CODE (decl) == RESULT_DECL,
7579 if (DECL_ASSEMBLER_NAME (decl) != DECL_NAME (decl))
7580 /* The user must have specified an assembler name for this
7581 variable. Set that up now. */
7582 rest_of_decl_compilation
7583 (decl, IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl)),
7584 /*top_level=*/0, /*at_end=*/0);
7589 /* Actually do the initialization. */
7590 expand_start_target_temps ();
7591 expand_decl_init (decl);
7592 expand_end_target_temps ();
7595 /* Finish processing of a declaration;
7596 install its line number and initial value.
7597 If the length of an array type is not known before,
7598 it must be determined now, from the initial value, or it is an error.
7600 Call `pop_obstacks' iff NEED_POP is nonzero.
7602 For C++, `cp_finish_decl' must be fairly evasive: it must keep initializers
7603 for aggregates that have constructors alive on the permanent obstack,
7604 so that the global initializing functions can be written at the end.
7606 INIT0 holds the value of an initializer that should be allowed to escape
7609 FLAGS is LOOKUP_ONLYCONVERTING is the = init syntax was used, else 0
7610 if the (init) syntax was used.
7612 For functions that take default parameters, DECL points to its
7613 "maximal" instantiation. `cp_finish_decl' must then also declared its
7614 subsequently lower and lower forms of instantiation, checking for
7615 ambiguity as it goes. This can be sped up later. */
7618 cp_finish_decl (decl, init, asmspec_tree, need_pop, flags)
7625 tree ttype = NULL_TREE;
7626 int temporary = allocation_temporary_p ();
7627 const char *asmspec = NULL;
7628 int was_readonly = 0;
7630 /* If this is 0, then we did not change obstacks. */
7634 error ("assignment (not initialization) in declaration");
7638 /* If a name was specified, get the string. */
7640 asmspec = TREE_STRING_POINTER (asmspec_tree);
7642 if (init && TREE_CODE (init) == NAMESPACE_DECL)
7644 cp_error ("Cannot initialize `%D' to namespace `%D'",
7649 if (current_class_type
7650 && DECL_REAL_CONTEXT (decl) == current_class_type
7651 && TYPE_BEING_DEFINED (current_class_type)
7652 && (DECL_INITIAL (decl) || init))
7653 DECL_DEFINED_IN_CLASS_P (decl) = 1;
7655 if (TREE_CODE (decl) == VAR_DECL
7656 && DECL_CONTEXT (decl)
7657 && TREE_CODE (DECL_CONTEXT (decl)) == NAMESPACE_DECL
7658 && DECL_CONTEXT (decl) != current_namespace
7661 /* Leave the namespace of the object. */
7662 pop_decl_namespace ();
7665 type = TREE_TYPE (decl);
7667 if (type == error_mark_node)
7669 if (toplevel_bindings_p () && temporary)
7670 end_temporary_allocation ();
7675 /* Add this declaration to the statement-tree. */
7676 if (building_stmt_tree ()
7677 && TREE_CODE (current_scope ()) == FUNCTION_DECL)
7678 add_decl_stmt (decl);
7680 if (TYPE_HAS_MUTABLE_P (type))
7681 TREE_READONLY (decl) = 0;
7683 if (processing_template_decl)
7685 if (init && DECL_INITIAL (decl))
7686 DECL_INITIAL (decl) = init;
7690 /* Parameters are handled by store_parm_decls, not cp_finish_decl. */
7691 my_friendly_assert (TREE_CODE (decl) != PARM_DECL, 19990828);
7693 /* Take care of TYPE_DECLs up front. */
7694 if (TREE_CODE (decl) == TYPE_DECL)
7696 if (init && DECL_INITIAL (decl))
7698 /* typedef foo = bar; store the type of bar as the type of foo. */
7699 TREE_TYPE (decl) = type = TREE_TYPE (init);
7700 DECL_INITIAL (decl) = init = NULL_TREE;
7702 if (type != error_mark_node
7703 && IS_AGGR_TYPE (type) && DECL_NAME (decl))
7705 if (TREE_TYPE (DECL_NAME (decl)) && TREE_TYPE (decl) != type)
7706 cp_warning ("shadowing previous type declaration of `%#D'", decl);
7707 set_identifier_type_value (DECL_NAME (decl), type);
7708 CLASSTYPE_GOT_SEMICOLON (type) = 1;
7710 GNU_xref_decl (current_function_decl, decl);
7712 /* If we have installed this as the canonical typedef for this
7713 type, and that type has not been defined yet, delay emitting
7714 the debug information for it, as we will emit it later. */
7715 if (TYPE_MAIN_DECL (TREE_TYPE (decl)) == decl
7716 && TYPE_SIZE (TREE_TYPE (decl)) == NULL_TREE)
7717 TYPE_DECL_SUPPRESS_DEBUG (decl) = 1;
7719 rest_of_decl_compilation (decl, NULL_PTR,
7720 DECL_CONTEXT (decl) == NULL_TREE, at_eof);
7724 if (TREE_CODE (decl) != FUNCTION_DECL)
7725 ttype = target_type (type);
7727 if (! DECL_EXTERNAL (decl) && TREE_READONLY (decl)
7728 && TYPE_NEEDS_CONSTRUCTING (type))
7730 /* Currently, GNU C++ puts constants in text space, making them
7731 impossible to initialize. In the future, one would hope for
7732 an operating system which understood the difference between
7733 initialization and the running of a program. */
7735 TREE_READONLY (decl) = 0;
7738 if (TREE_CODE (decl) == FIELD_DECL && asmspec)
7740 /* This must override the asm specifier which was placed by
7741 grokclassfn. Lay this out fresh. */
7742 DECL_RTL (TREE_TYPE (decl)) = NULL_RTX;
7743 DECL_ASSEMBLER_NAME (decl) = get_identifier (asmspec);
7744 make_decl_rtl (decl, asmspec, 0);
7747 /* Deduce size of array from initialization, if not already known. */
7748 maybe_deduce_size_from_array_init (decl, init);
7749 init = check_initializer (decl, init);
7751 GNU_xref_decl (current_function_decl, decl);
7753 /* For top-level declaration, the initial value was read in
7754 the temporary obstack. MAXINDEX, rtl, etc. to be made below
7755 must go in the permanent obstack; but don't discard the
7756 temporary data yet. */
7758 if (toplevel_bindings_p () && temporary)
7759 end_temporary_allocation ();
7761 if (TREE_CODE (decl) == VAR_DECL)
7762 layout_var_decl (decl);
7764 /* Output the assembler code and/or RTL code for variables and functions,
7765 unless the type is an undefined structure or union.
7766 If not, it will get done when the type is completed. */
7767 if (TREE_CODE (decl) == VAR_DECL || TREE_CODE (decl) == FUNCTION_DECL
7768 || TREE_CODE (decl) == RESULT_DECL)
7770 if (TREE_CODE (decl) == VAR_DECL)
7771 maybe_commonize_var (decl);
7773 make_rtl_for_nonlocal_decl (decl, init, asmspec);
7775 if (TREE_CODE (type) == FUNCTION_TYPE
7776 || TREE_CODE (type) == METHOD_TYPE)
7777 abstract_virtuals_error (decl,
7778 strip_array_types (TREE_TYPE (type)));
7780 abstract_virtuals_error (decl, strip_array_types (type));
7782 if (TREE_CODE (decl) == FUNCTION_DECL)
7784 else if (DECL_EXTERNAL (decl)
7785 && ! (DECL_LANG_SPECIFIC (decl)
7786 && DECL_NOT_REALLY_EXTERN (decl)))
7789 DECL_INITIAL (decl) = init;
7791 else if (TREE_CODE (CP_DECL_CONTEXT (decl)) == FUNCTION_DECL)
7793 /* This is a local declaration. */
7794 if (doing_semantic_analysis_p ())
7795 maybe_inject_for_scope_var (decl);
7796 /* Initialize the local variable. But, if we're building a
7797 statement-tree, we'll do the initialization when we
7799 if (processing_template_decl)
7801 if (init || DECL_INITIAL (decl) == error_mark_node)
7802 DECL_INITIAL (decl) = init;
7806 /* If we're not building RTL, then we need to do so
7808 if (!building_stmt_tree ())
7809 emit_local_var (decl);
7810 /* Initialize the variable. */
7811 initialize_local_var (decl, init, flags);
7812 /* Clean up the variable. */
7813 destroy_local_var (decl);
7816 else if (TREE_STATIC (decl) && type != error_mark_node)
7818 /* Cleanups for static variables are handled by `finish_file'. */
7819 if (TYPE_NEEDS_CONSTRUCTING (type) || init != NULL_TREE
7820 || TYPE_NEEDS_DESTRUCTOR (type))
7821 expand_static_init (decl, init);
7825 /* Undo call to `pushclass' that was done in `start_decl'
7826 due to initialization of qualified member variable.
7827 I.e., Foo::x = 10; */
7829 tree context = DECL_REAL_CONTEXT (decl);
7831 && TREE_CODE_CLASS (TREE_CODE (context)) == 't'
7832 && (TREE_CODE (decl) == VAR_DECL
7833 /* We also have a pushclass done that we need to undo here
7834 if we're at top level and declare a method. */
7835 || TREE_CODE (decl) == FUNCTION_DECL)
7836 /* If size hasn't been set, we're still defining it,
7837 and therefore inside the class body; don't pop
7838 the binding level.. */
7839 && TYPE_SIZE (context) != NULL_TREE
7840 && context == current_class_type)
7841 pop_nested_class ();
7847 /* If requested, warn about definitions of large data objects. */
7849 if (warn_larger_than
7850 && ! processing_template_decl
7851 && (TREE_CODE (decl) == VAR_DECL || TREE_CODE (decl) == PARM_DECL)
7852 && !DECL_EXTERNAL (decl))
7854 register tree decl_size = DECL_SIZE (decl);
7856 if (decl_size && TREE_CODE (decl_size) == INTEGER_CST)
7858 unsigned units = TREE_INT_CST_LOW (decl_size) / BITS_PER_UNIT;
7860 if (units > larger_than_size)
7861 warning_with_decl (decl, "size of `%s' is %u bytes", units);
7866 /* Resume permanent allocation, if not within a function. The
7867 corresponding push_obstacks_nochange is in start_decl,
7868 start_method, groktypename, and in grokfield. */
7872 TREE_READONLY (decl) = 1;
7875 /* This is here for a midend callback from c-common.c */
7878 finish_decl (decl, init, asmspec_tree)
7882 cp_finish_decl (decl, init, asmspec_tree, 1, 0);
7885 /* Generate code to handle the destruction of the function-scoped
7886 static variable DECL. */
7889 destroy_local_static (decl)
7892 tree cleanup, fcall;
7894 int saved_flag_access_control;
7896 if (atexit_node == 0)
7898 tree atexit_fndecl, PFV, pfvlist;
7899 /* Remember this information until end of file. */
7900 push_obstacks (&permanent_obstack, &permanent_obstack);
7901 PFV = build_pointer_type (build_function_type
7902 (void_type_node, void_list_node));
7904 pfvlist = tree_cons (NULL_TREE, PFV, void_list_node);
7906 push_lang_context (lang_name_c);
7907 /* Note that we do not call pushdecl for this function;
7908 there's no reason that this declaration should be
7909 accessible to anyone. */
7911 = define_function ("atexit",
7912 build_function_type (void_type_node,
7914 /*pfn=*/0, NULL_PTR);
7915 mark_used (atexit_fndecl);
7916 atexit_node = default_conversion (atexit_fndecl);
7917 pop_lang_context ();
7921 /* Call build_cleanup before we enter the anonymous function so that
7922 any access checks will be done relative to the current scope,
7923 rather than the scope of the anonymous function. */
7924 build_cleanup (decl);
7926 /* Now start the function. */
7927 cleanup = start_anon_func ();
7929 /* Now, recompute the cleanup. It may contain SAVE_EXPRs that refer
7930 to the original function, rather than the anonymous one. That
7931 will make the back-end think that nested functions are in use,
7932 which causes confusion. */
7933 saved_flag_access_control = flag_access_control;
7934 flag_access_control = 0;
7935 fcall = build_cleanup (decl);
7936 flag_access_control = saved_flag_access_control;
7938 /* Create the body of the anonymous function. */
7939 compound_stmt = begin_compound_stmt (/*has_no_scope=*/0);
7940 finish_expr_stmt (fcall);
7941 finish_compound_stmt (/*has_no_scope=*/0, compound_stmt);
7944 /* Call atexit with the cleanup function. */
7945 mark_addressable (cleanup);
7946 cleanup = build_unary_op (ADDR_EXPR, cleanup, 0);
7947 fcall = build_function_call (atexit_node,
7948 tree_cons (NULL_TREE,
7951 finish_expr_stmt (fcall);
7955 expand_static_init (decl, init)
7959 tree oldstatic = value_member (decl, static_aggregates);
7963 if (TREE_PURPOSE (oldstatic) && init != NULL_TREE)
7964 cp_error ("multiple initializations given for `%D'", decl);
7966 else if (! toplevel_bindings_p ())
7968 /* Emit code to perform this initialization but once. */
7975 /* Remember this information until end of file. */
7976 push_obstacks (&permanent_obstack, &permanent_obstack);
7978 /* Emit code to perform this initialization but once. This code
7981 static int temp = 0;
7983 // Do initialization.
7985 // Register variable for destruction at end of program.
7988 Note that the `temp' variable is only set to 1 *after* the
7989 initialization is complete. This ensures that an exception,
7990 thrown during the construction, will cause the variable to
7991 reinitialized when we pass through this code again, as per:
7995 If the initialization exits by throwing an exception, the
7996 initialization is not complete, so it will be tried again
7997 the next time control enters the declaration.
7999 In theory, this process should be thread-safe, too; multiple
8000 threads should not be able to initialize the variable more
8001 than once. We don't yet attempt to ensure thread-safety. */
8002 temp = get_temp_name (integer_type_node, 1);
8003 rest_of_decl_compilation (temp, NULL_PTR, 0, 0);
8005 /* Begin the conditional initialization. */
8006 if_stmt = begin_if_stmt ();
8007 finish_if_stmt_cond (build_binary_op (EQ_EXPR, temp,
8010 then_clause = begin_compound_stmt (/*has_no_scope=*/0);
8012 /* Do the initialization itself. */
8013 if (TYPE_NEEDS_CONSTRUCTING (TREE_TYPE (decl))
8014 || (init && TREE_CODE (init) == TREE_LIST))
8015 assignment = build_aggr_init (decl, init, 0);
8018 /* The initialization we're doing here is just a bitwise
8020 assignment = build (INIT_EXPR, TREE_TYPE (decl), decl, init);
8021 TREE_SIDE_EFFECTS (assignment) = 1;
8024 assignment = NULL_TREE;
8026 /* Once the assignment is complete, set TEMP to 1. Since the
8027 construction of the static object is complete at this point,
8028 we want to make sure TEMP is set to 1 even if a temporary
8029 constructed during the initialization throws an exception
8030 when it is destroyed. So, we combine the initialization and
8031 the assignment to TEMP into a single expression, ensuring
8032 that when we call finish_expr_stmt the cleanups will not be
8033 run until after TEMP is set to 1. */
8034 temp_init = build_modify_expr (temp, NOP_EXPR, integer_one_node);
8037 assignment = tree_cons (NULL_TREE, assignment,
8038 build_tree_list (NULL_TREE,
8040 assignment = build_compound_expr (assignment);
8043 assignment = temp_init;
8044 finish_expr_stmt (assignment);
8046 /* Use atexit to register a function for destroying this static
8048 if (TYPE_NEEDS_DESTRUCTOR (TREE_TYPE (decl)))
8049 destroy_local_static (decl);
8051 finish_compound_stmt (/*has_no_scope=*/0, then_clause);
8052 finish_then_clause (if_stmt);
8055 /* Resume old (possibly temporary) allocation. */
8060 /* This code takes into account memory allocation policy of
8061 `start_decl'. Namely, if TYPE_NEEDS_CONSTRUCTING does not
8062 hold for this object, then we must make permanent the storage
8063 currently in the temporary obstack. */
8064 if (!TYPE_NEEDS_CONSTRUCTING (TREE_TYPE (decl)))
8065 preserve_initializer ();
8066 static_aggregates = tree_cons (init, decl, static_aggregates);
8070 /* Finish the declaration of a catch-parameter. */
8073 start_handler_parms (declspecs, declarator)
8080 decl = grokdeclarator (declarator, declspecs, CATCHPARM,
8082 if (decl == NULL_TREE)
8083 error ("invalid catch parameter");
8092 /* Make TYPE a complete type based on INITIAL_VALUE.
8093 Return 0 if successful, 1 if INITIAL_VALUE can't be deciphered,
8094 2 if there was no information (in which case assume 0 if DO_DEFAULT). */
8097 complete_array_type (type, initial_value, do_default)
8098 tree type, initial_value;
8101 register tree maxindex = NULL_TREE;
8104 /* Allocate on the same obstack as TYPE. */
8105 push_obstacks (TYPE_OBSTACK (type), TYPE_OBSTACK (type));
8109 /* Note MAXINDEX is really the maximum index,
8110 one less than the size. */
8111 if (TREE_CODE (initial_value) == STRING_CST)
8114 = int_size_in_bytes (TREE_TYPE (TREE_TYPE (initial_value)));
8115 maxindex = build_int_2 ((TREE_STRING_LENGTH (initial_value)
8118 else if (TREE_CODE (initial_value) == CONSTRUCTOR)
8120 tree elts = CONSTRUCTOR_ELTS (initial_value);
8121 maxindex = size_binop (MINUS_EXPR, integer_zero_node, size_one_node);
8122 for (; elts; elts = TREE_CHAIN (elts))
8124 if (TREE_PURPOSE (elts))
8125 maxindex = TREE_PURPOSE (elts);
8127 maxindex = size_binop (PLUS_EXPR, maxindex, size_one_node);
8129 maxindex = copy_node (maxindex);
8133 /* Make an error message unless that happened already. */
8134 if (initial_value != error_mark_node)
8137 initial_value = NULL_TREE;
8139 /* Prevent further error messages. */
8140 maxindex = build_int_2 (0, 0);
8147 maxindex = build_int_2 (0, 0);
8156 domain = build_index_type (maxindex);
8157 TYPE_DOMAIN (type) = domain;
8159 if (! TREE_TYPE (maxindex))
8160 TREE_TYPE (maxindex) = domain;
8162 itype = TREE_TYPE (initial_value);
8165 if (itype && !TYPE_DOMAIN (itype))
8166 TYPE_DOMAIN (itype) = domain;
8167 /* The type of the main variant should never be used for arrays
8168 of different sizes. It should only ever be completed with the
8169 size of the array. */
8170 if (! TYPE_DOMAIN (TYPE_MAIN_VARIANT (type)))
8171 TYPE_DOMAIN (TYPE_MAIN_VARIANT (type)) = domain;
8176 /* Lay out the type now that we can get the real answer. */
8183 /* Return zero if something is declared to be a member of type
8184 CTYPE when in the context of CUR_TYPE. STRING is the error
8185 message to print in that case. Otherwise, quietly return 1. */
8188 member_function_or_else (ctype, cur_type, string)
8189 tree ctype, cur_type;
8192 if (ctype && ctype != cur_type)
8194 error (string, TYPE_NAME_STRING (ctype));
8200 /* Subroutine of `grokdeclarator'. */
8202 /* Generate errors possibly applicable for a given set of specifiers.
8203 This is for ARM $7.1.2. */
8206 bad_specifiers (object, type, virtualp, quals, inlinep, friendp, raises)
8209 int virtualp, quals, friendp, raises, inlinep;
8212 cp_error ("`%D' declared as a `virtual' %s", object, type);
8214 cp_error ("`%D' declared as an `inline' %s", object, type);
8216 cp_error ("`const' and `volatile' function specifiers on `%D' invalid in %s declaration",
8219 cp_error_at ("`%D' declared as a friend", object);
8221 cp_error_at ("`%D' declared with an exception specification", object);
8224 /* CTYPE is class type, or null if non-class.
8225 TYPE is type this FUNCTION_DECL should have, either FUNCTION_TYPE
8227 DECLARATOR is the function's name.
8228 VIRTUALP is truthvalue of whether the function is virtual or not.
8229 FLAGS are to be passed through to `grokclassfn'.
8230 QUALS are qualifiers indicating whether the function is `const'
8232 RAISES is a list of exceptions that this function can raise.
8233 CHECK is 1 if we must find this method in CTYPE, 0 if we should
8234 not look, and -1 if we should not call `grokclassfn' at all.
8236 Returns `NULL_TREE' if something goes wrong, after issuing
8237 applicable error messages. */
8240 grokfndecl (ctype, type, declarator, orig_declarator, virtualp, flags, quals,
8241 raises, check, friendp, publicp, inlinep, funcdef_flag,
8242 template_count, in_namespace)
8245 tree orig_declarator;
8247 enum overload_flags flags;
8249 int check, friendp, publicp, inlinep, funcdef_flag, template_count;
8253 int staticp = ctype && TREE_CODE (type) == FUNCTION_TYPE;
8254 int has_default_arg = 0;
8258 cname = TREE_CODE (TYPE_NAME (ctype)) == TYPE_DECL
8259 ? TYPE_IDENTIFIER (ctype) : TYPE_NAME (ctype);
8265 type = build_exception_variant (type, raises);
8268 decl = build_lang_decl (FUNCTION_DECL, declarator, type);
8269 /* Propagate volatile out from type to decl. */
8270 if (TYPE_VOLATILE (type))
8271 TREE_THIS_VOLATILE (decl) = 1;
8273 /* If this decl has namespace scope, set that up. */
8275 set_decl_namespace (decl, in_namespace, friendp);
8276 else if (publicp && ! ctype)
8277 DECL_CONTEXT (decl) = FROB_CONTEXT (current_namespace);
8279 /* `main' and builtins have implicit 'C' linkage. */
8280 if ((MAIN_NAME_P (declarator)
8281 || (IDENTIFIER_LENGTH (declarator) > 10
8282 && IDENTIFIER_POINTER (declarator)[0] == '_'
8283 && IDENTIFIER_POINTER (declarator)[1] == '_'
8284 && strncmp (IDENTIFIER_POINTER (declarator)+2, "builtin_", 8) == 0))
8285 && current_lang_name == lang_name_cplusplus
8286 && ctype == NULL_TREE
8287 /* NULL_TREE means global namespace. */
8288 && DECL_CONTEXT (decl) == NULL_TREE)
8289 DECL_LANGUAGE (decl) = lang_c;
8291 /* Should probably propagate const out from type to decl I bet (mrs). */
8294 DECL_STATIC_FUNCTION_P (decl) = 1;
8295 DECL_CONTEXT (decl) = ctype;
8299 DECL_CLASS_CONTEXT (decl) = ctype;
8301 if (ctype == NULL_TREE && DECL_MAIN_P (decl))
8303 if (processing_template_decl)
8304 error ("cannot declare `main' to be a template");
8306 error ("cannot declare `main' to be inline");
8308 error ("cannot declare `main' to be static");
8313 /* Members of anonymous types and local classes have no linkage; make
8315 if (ctype && (ANON_AGGRNAME_P (TYPE_IDENTIFIER (ctype))
8316 || hack_decl_function_context (TYPE_MAIN_DECL (ctype))))
8321 /* [basic.link]: A name with no linkage (notably, the name of a class
8322 or enumeration declared in a local scope) shall not be used to
8323 declare an entity with linkage.
8325 Only check this for public decls for now. */
8326 t = no_linkage_check (TREE_TYPE (decl));
8329 if (ANON_AGGRNAME_P (TYPE_IDENTIFIER (t)))
8331 if (DECL_LANGUAGE (decl) == lang_c)
8332 /* Allow this; it's pretty common in C. */;
8334 cp_pedwarn ("non-local function `%#D' uses anonymous type",
8338 cp_pedwarn ("non-local function `%#D' uses local type `%T'",
8343 TREE_PUBLIC (decl) = publicp;
8346 DECL_INTERFACE_KNOWN (decl) = 1;
8347 DECL_NOT_REALLY_EXTERN (decl) = 1;
8351 DECL_THIS_INLINE (decl) = DECL_INLINE (decl) = 1;
8353 DECL_EXTERNAL (decl) = 1;
8354 if (quals != NULL_TREE && TREE_CODE (type) == FUNCTION_TYPE)
8356 cp_error ("%smember function `%D' cannot have `%T' method qualifier",
8357 (ctype ? "static " : "non-"), decl, TREE_VALUE (quals));
8361 if (IDENTIFIER_OPNAME_P (DECL_NAME (decl)))
8362 grok_op_properties (decl, virtualp, check < 0);
8364 if (ctype && hack_decl_function_context (decl))
8365 DECL_NO_STATIC_CHAIN (decl) = 1;
8367 for (t = TYPE_ARG_TYPES (TREE_TYPE (decl)); t; t = TREE_CHAIN (t))
8368 if (TREE_PURPOSE (t)
8369 && TREE_CODE (TREE_PURPOSE (t)) == DEFAULT_ARG)
8371 has_default_arg = 1;
8376 && TREE_CODE (orig_declarator) == TEMPLATE_ID_EXPR)
8380 ("defining explicit specialization `%D' in friend declaration",
8384 if (PROCESSING_REAL_TEMPLATE_DECL_P ())
8386 /* Something like `template <class T> friend void f<T>()'. */
8387 cp_error ("template-id `%D' in declaration of primary template",
8393 /* A friend declaration of the form friend void f<>(). Record
8394 the information in the TEMPLATE_ID_EXPR. */
8395 SET_DECL_IMPLICIT_INSTANTIATION (decl);
8396 DECL_TEMPLATE_INFO (decl)
8397 = tree_cons (TREE_OPERAND (orig_declarator, 0),
8398 TREE_OPERAND (orig_declarator, 1),
8401 if (has_default_arg)
8403 cp_error ("default arguments are not allowed in declaration of friend template specialization `%D'",
8410 cp_error ("`inline' is not allowed in declaration of friend template specialization `%D'",
8417 if (has_default_arg)
8418 add_defarg_fn (decl);
8420 /* Plain overloading: will not be grok'd by grokclassfn. */
8421 if (! ctype && ! processing_template_decl
8422 && DECL_LANGUAGE (decl) != lang_c
8423 && (! DECL_USE_TEMPLATE (decl) || name_mangling_version < 1))
8424 set_mangled_name_for_decl (decl);
8427 /* Make the init_value nonzero so pushdecl knows this is not
8428 tentative. error_mark_node is replaced later with the BLOCK. */
8429 DECL_INITIAL (decl) = error_mark_node;
8431 /* Caller will do the rest of this. */
8435 if (check && funcdef_flag)
8436 DECL_INITIAL (decl) = error_mark_node;
8438 if (flags == NO_SPECIAL && ctype && constructor_name (cname) == declarator)
8441 /* Just handle constructors here. We could do this
8442 inside the following if stmt, but I think
8443 that the code is more legible by breaking this
8444 case out. See comments below for what each of
8445 the following calls is supposed to do. */
8446 DECL_CONSTRUCTOR_P (decl) = 1;
8448 grokclassfn (ctype, decl, flags, quals);
8450 decl = check_explicit_specialization (orig_declarator, decl,
8452 2 * (funcdef_flag != 0) +
8453 4 * (friendp != 0));
8454 if (decl == error_mark_node)
8457 if ((! TYPE_FOR_JAVA (ctype) || check_java_method (decl))
8460 tmp = check_classfn (ctype, decl);
8462 if (tmp && TREE_CODE (tmp) == TEMPLATE_DECL)
8463 tmp = DECL_TEMPLATE_RESULT(tmp);
8465 if (tmp && DECL_ARTIFICIAL (tmp))
8466 cp_error ("definition of implicitly-declared `%D'", tmp);
8467 if (tmp && duplicate_decls (decl, tmp))
8470 if (! grok_ctor_properties (ctype, decl))
8477 /* Function gets the ugly name, field gets the nice one.
8478 This call may change the type of the function (because
8479 of default parameters)! */
8480 if (ctype != NULL_TREE)
8481 grokclassfn (ctype, decl, flags, quals);
8483 decl = check_explicit_specialization (orig_declarator, decl,
8485 2 * (funcdef_flag != 0) +
8486 4 * (friendp != 0));
8487 if (decl == error_mark_node)
8490 if (ctype != NULL_TREE
8491 && (! TYPE_FOR_JAVA (ctype) || check_java_method (decl))
8494 tmp = check_classfn (ctype, decl);
8496 if (tmp && TREE_CODE (tmp) == TEMPLATE_DECL)
8497 tmp = DECL_TEMPLATE_RESULT (tmp);
8499 if (tmp && DECL_STATIC_FUNCTION_P (tmp)
8500 && TREE_CODE (TREE_TYPE (decl)) == METHOD_TYPE)
8502 /* Remove the `this' parm added by grokclassfn.
8503 XXX Isn't this done in start_function, too? */
8504 revert_static_member_fn (&decl, NULL, NULL);
8505 last_function_parms = TREE_CHAIN (last_function_parms);
8507 if (tmp && DECL_ARTIFICIAL (tmp))
8508 cp_error ("definition of implicitly-declared `%D'", tmp);
8511 /* Attempt to merge the declarations. This can fail, in
8512 the case of some illegal specialization declarations. */
8513 if (!duplicate_decls (decl, tmp))
8514 cp_error ("no `%#D' member function declared in class `%T'",
8520 if (ctype == NULL_TREE || check)
8525 DECL_VIRTUAL_P (decl) = 1;
8526 if (DECL_VINDEX (decl) == NULL_TREE)
8527 DECL_VINDEX (decl) = error_mark_node;
8528 IDENTIFIER_VIRTUAL_P (DECL_NAME (decl)) = 1;
8535 grokvardecl (type, declarator, specbits_in, initialized, constp, in_namespace)
8538 RID_BIT_TYPE *specbits_in;
8544 RID_BIT_TYPE specbits;
8546 specbits = *specbits_in;
8548 if (TREE_CODE (type) == OFFSET_TYPE)
8550 /* If you declare a static member so that it
8551 can be initialized, the code will reach here. */
8552 tree basetype = TYPE_OFFSET_BASETYPE (type);
8553 type = TREE_TYPE (type);
8554 decl = build_lang_decl (VAR_DECL, declarator, type);
8555 DECL_CONTEXT (decl) = basetype;
8556 DECL_CLASS_CONTEXT (decl) = basetype;
8557 DECL_ASSEMBLER_NAME (decl) = build_static_name (basetype, declarator);
8564 context = in_namespace;
8565 else if (namespace_bindings_p () || RIDBIT_SETP (RID_EXTERN, specbits))
8566 context = current_namespace;
8568 context = NULL_TREE;
8570 if (processing_template_decl)
8572 /* If we're in a template, we need DECL_LANG_SPECIFIC so that
8573 we can call push_template_decl. */
8574 push_permanent_obstack ();
8575 decl = build_lang_decl (VAR_DECL, declarator, type);
8579 decl = build_decl (VAR_DECL, declarator, type);
8582 set_decl_namespace (decl, context, 0);
8584 context = DECL_CONTEXT (decl);
8585 if (declarator && context && current_lang_name != lang_name_c)
8586 DECL_ASSEMBLER_NAME (decl) = build_static_name (context, declarator);
8590 set_decl_namespace (decl, in_namespace, 0);
8592 if (RIDBIT_SETP (RID_EXTERN, specbits))
8594 DECL_THIS_EXTERN (decl) = 1;
8595 DECL_EXTERNAL (decl) = !initialized;
8598 /* In class context, static means one per class,
8599 public access, and static storage. */
8600 if (DECL_CLASS_SCOPE_P (decl))
8602 TREE_PUBLIC (decl) = 1;
8603 TREE_STATIC (decl) = 1;
8604 DECL_EXTERNAL (decl) = 0;
8606 /* At top level, either `static' or no s.c. makes a definition
8607 (perhaps tentative), and absence of `static' makes it public. */
8608 else if (toplevel_bindings_p ())
8610 TREE_PUBLIC (decl) = (RIDBIT_NOTSETP (RID_STATIC, specbits)
8611 && (DECL_THIS_EXTERN (decl) || ! constp));
8612 TREE_STATIC (decl) = ! DECL_EXTERNAL (decl);
8614 /* Not at top level, only `static' makes a static definition. */
8617 TREE_STATIC (decl) = !! RIDBIT_SETP (RID_STATIC, specbits);
8618 TREE_PUBLIC (decl) = DECL_EXTERNAL (decl);
8621 if (TREE_PUBLIC (decl))
8623 /* [basic.link]: A name with no linkage (notably, the name of a class
8624 or enumeration declared in a local scope) shall not be used to
8625 declare an entity with linkage.
8627 Only check this for public decls for now. */
8628 tree t = no_linkage_check (TREE_TYPE (decl));
8631 if (ANON_AGGRNAME_P (TYPE_IDENTIFIER (t)))
8632 /* Ignore for now; `enum { foo } e' is pretty common. */;
8634 cp_pedwarn ("non-local variable `%#D' uses local type `%T'",
8642 /* Create and return a canonical pointer to member function type, for
8643 TYPE, which is a POINTER_TYPE to a METHOD_TYPE. */
8646 build_ptrmemfunc_type (type)
8652 tree unqualified_variant = NULL_TREE;
8654 /* If a canonical type already exists for this type, use it. We use
8655 this method instead of type_hash_canon, because it only does a
8656 simple equality check on the list of field members. */
8658 if ((t = TYPE_GET_PTRMEMFUNC_TYPE (type)))
8661 /* Make sure that we always have the unqualified pointer-to-member
8663 if (CP_TYPE_QUALS (type) != TYPE_UNQUALIFIED)
8665 = build_ptrmemfunc_type (TYPE_MAIN_VARIANT (type));
8667 push_obstacks (TYPE_OBSTACK (type), TYPE_OBSTACK (type));
8669 u = make_lang_type (UNION_TYPE);
8670 SET_IS_AGGR_TYPE (u, 0);
8671 fields[0] = build_lang_decl (FIELD_DECL, pfn_identifier, type);
8672 fields[1] = build_lang_decl (FIELD_DECL, delta2_identifier,
8674 finish_builtin_type (u, "__ptrmemfunc_type", fields, 1, ptr_type_node);
8675 TYPE_NAME (u) = NULL_TREE;
8677 t = make_lang_type (RECORD_TYPE);
8679 /* Let the front-end know this is a pointer to member function... */
8680 TYPE_PTRMEMFUNC_FLAG (t) = 1;
8681 /* ... and not really an aggregate. */
8682 SET_IS_AGGR_TYPE (t, 0);
8684 fields[0] = build_lang_decl (FIELD_DECL, delta_identifier,
8686 fields[1] = build_lang_decl (FIELD_DECL, index_identifier,
8688 fields[2] = build_lang_decl (FIELD_DECL, pfn_or_delta2_identifier, u);
8689 finish_builtin_type (t, "__ptrmemfunc_type", fields, 2, ptr_type_node);
8693 /* Zap out the name so that the back-end will give us the debugging
8694 information for this anonymous RECORD_TYPE. */
8695 TYPE_NAME (t) = NULL_TREE;
8697 /* If this is not the unqualified form of this pointer-to-member
8698 type, set the TYPE_MAIN_VARIANT for this type to be the
8699 unqualified type. Since they are actually RECORD_TYPEs that are
8700 not variants of each other, we must do this manually. */
8701 if (CP_TYPE_QUALS (type) != TYPE_UNQUALIFIED)
8703 t = build_qualified_type (t, CP_TYPE_QUALS (type));
8704 TYPE_MAIN_VARIANT (t) = unqualified_variant;
8705 TYPE_NEXT_VARIANT (t) = TYPE_NEXT_VARIANT (unqualified_variant);
8706 TYPE_NEXT_VARIANT (unqualified_variant) = t;
8709 /* Cache this pointer-to-member type so that we can find it again
8711 TYPE_SET_PTRMEMFUNC_TYPE (type, t);
8713 /* Seems to be wanted. */
8714 CLASSTYPE_GOT_SEMICOLON (t) = 1;
8719 /* DECL is a VAR_DECL defined in-class, whose TYPE is also given.
8720 Check to see that the definition is valid. Issue appropriate error
8721 messages. Return 1 if the definition is particularly bad, or 0
8725 check_static_variable_definition (decl, type)
8729 /* Motion 10 at San Diego: If a static const integral data member is
8730 initialized with an integral constant expression, the initializer
8731 may appear either in the declaration (within the class), or in
8732 the definition, but not both. If it appears in the class, the
8733 member is a member constant. The file-scope definition is always
8735 if (CLASS_TYPE_P (type) || TREE_CODE (type) == REFERENCE_TYPE)
8737 cp_error ("in-class initialization of static data member of non-integral type `%T'",
8739 /* If we just return the declaration, crashes will sometimes
8740 occur. We therefore return void_type_node, as if this was a
8741 friend declaration, to cause callers to completely ignore
8742 this declaration. */
8745 else if (!CP_TYPE_CONST_P (type))
8746 cp_error ("ANSI C++ forbids in-class initialization of non-const static member `%D'",
8748 else if (pedantic && !INTEGRAL_TYPE_P (type))
8749 cp_pedwarn ("ANSI C++ forbids initialization of member constant `%D' of non-integral type `%T'", decl, type);
8754 /* Given declspecs and a declarator,
8755 determine the name and type of the object declared
8756 and construct a ..._DECL node for it.
8757 (In one case we can return a ..._TYPE node instead.
8758 For invalid input we sometimes return 0.)
8760 DECLSPECS is a chain of tree_list nodes whose value fields
8761 are the storage classes and type specifiers.
8763 DECL_CONTEXT says which syntactic context this declaration is in:
8764 NORMAL for most contexts. Make a VAR_DECL or FUNCTION_DECL or TYPE_DECL.
8765 FUNCDEF for a function definition. Like NORMAL but a few different
8766 error messages in each case. Return value may be zero meaning
8767 this definition is too screwy to try to parse.
8768 MEMFUNCDEF for a function definition. Like FUNCDEF but prepares to
8769 handle member functions (which have FIELD context).
8770 Return value may be zero meaning this definition is too screwy to
8772 PARM for a parameter declaration (either within a function prototype
8773 or before a function body). Make a PARM_DECL, or return void_type_node.
8774 CATCHPARM for a parameter declaration before a catch clause.
8775 TYPENAME if for a typename (in a cast or sizeof).
8776 Don't make a DECL node; just return the ..._TYPE node.
8777 FIELD for a struct or union field; make a FIELD_DECL.
8778 BITFIELD for a field with specified width.
8779 INITIALIZED is 1 if the decl has an initializer.
8781 ATTRLIST is a TREE_LIST node with prefix attributes in TREE_VALUE and
8782 normal attributes in TREE_PURPOSE, or NULL_TREE.
8784 In the TYPENAME case, DECLARATOR is really an absolute declarator.
8785 It may also be so in the PARM case, for a prototype where the
8786 argument type is specified but not the name.
8788 This function is where the complicated C meanings of `static'
8789 and `extern' are interpreted.
8791 For C++, if there is any monkey business to do, the function which
8792 calls this one must do it, i.e., prepending instance variables,
8793 renaming overloaded function names, etc.
8795 Note that for this C++, it is an error to define a method within a class
8796 which does not belong to that class.
8798 Except in the case where SCOPE_REFs are implicitly known (such as
8799 methods within a class being redundantly qualified),
8800 declarations which involve SCOPE_REFs are returned as SCOPE_REFs
8801 (class_name::decl_name). The caller must also deal with this.
8803 If a constructor or destructor is seen, and the context is FIELD,
8804 then the type gains the attribute TREE_HAS_x. If such a declaration
8805 is erroneous, NULL_TREE is returned.
8807 QUALS is used only for FUNCDEF and MEMFUNCDEF cases. For a member
8808 function, these are the qualifiers to give to the `this' pointer.
8810 May return void_type_node if the declarator turned out to be a friend.
8811 See grokfield for details. */
8813 enum return_types { return_normal, return_ctor, return_dtor, return_conversion };
8816 grokdeclarator (declarator, declspecs, decl_context, initialized, attrlist)
8819 enum decl_context decl_context;
8823 RID_BIT_TYPE specbits;
8826 tree type = NULL_TREE;
8832 int virtualp, explicitp, friendp, inlinep, staticp;
8833 int explicit_int = 0;
8834 int explicit_char = 0;
8835 int defaulted_int = 0;
8836 tree typedef_decl = NULL_TREE;
8838 tree typedef_type = NULL_TREE;
8839 int funcdef_flag = 0;
8840 enum tree_code innermost_code = ERROR_MARK;
8843 /* See the code below that used this. */
8844 tree decl_machine_attr = NULL_TREE;
8846 /* Set this to error_mark_node for FIELD_DECLs we could not handle properly.
8847 All FIELD_DECLs we build here have `init' put into their DECL_INITIAL. */
8848 tree init = NULL_TREE;
8850 /* Keep track of what sort of function is being processed
8851 so that we can warn about default return values, or explicit
8852 return values which do not match prescribed defaults. */
8853 enum return_types return_type = return_normal;
8855 tree dname = NULL_TREE;
8856 tree ctype = current_class_type;
8857 tree ctor_return_type = NULL_TREE;
8858 enum overload_flags flags = NO_SPECIAL;
8859 tree quals = NULL_TREE;
8860 tree raises = NULL_TREE;
8861 int template_count = 0;
8862 tree in_namespace = NULL_TREE;
8866 RIDBIT_RESET_ALL (specbits);
8867 if (decl_context == FUNCDEF)
8868 funcdef_flag = 1, decl_context = NORMAL;
8869 else if (decl_context == MEMFUNCDEF)
8870 funcdef_flag = -1, decl_context = FIELD;
8871 else if (decl_context == BITFIELD)
8872 bitfield = 1, decl_context = FIELD;
8874 /* Look inside a declarator for the name being declared
8875 and get it as a string, for an error message. */
8877 tree *next = &declarator;
8881 while (next && *next)
8884 switch (TREE_CODE (decl))
8887 /* For attributes. */
8888 next = &TREE_VALUE (decl);
8893 next = &TREE_OPERAND (decl, 0);
8896 case BIT_NOT_EXPR: /* For C++ destructors! */
8898 tree name = TREE_OPERAND (decl, 0);
8899 tree rename = NULL_TREE;
8901 my_friendly_assert (flags == NO_SPECIAL, 152);
8903 return_type = return_dtor;
8904 if (TREE_CODE (name) == TYPE_DECL)
8905 TREE_OPERAND (decl, 0) = name = constructor_name (name);
8906 my_friendly_assert (TREE_CODE (name) == IDENTIFIER_NODE, 153);
8907 if (ctype == NULL_TREE)
8909 if (current_class_type == NULL_TREE)
8911 error ("destructors must be member functions");
8916 tree t = constructor_name (current_class_name);
8923 tree t = constructor_name (ctype);
8930 cp_error ("destructor `%T' must match class name `%T'",
8932 TREE_OPERAND (decl, 0) = rename;
8938 case ADDR_EXPR: /* C++ reference declaration */
8943 innermost_code = TREE_CODE (decl);
8944 next = &TREE_OPERAND (decl, 0);
8948 if (parmlist_is_exprlist (CALL_DECLARATOR_PARMS (decl)))
8950 /* This is actually a variable declaration using
8951 constructor syntax. We need to call start_decl and
8952 cp_finish_decl so we can get the variable
8955 tree attributes, prefix_attributes;
8957 *next = TREE_OPERAND (decl, 0);
8958 init = CALL_DECLARATOR_PARMS (decl);
8962 attributes = TREE_PURPOSE (attrlist);
8963 prefix_attributes = TREE_VALUE (attrlist);
8967 attributes = NULL_TREE;
8968 prefix_attributes = NULL_TREE;
8971 decl = start_decl (declarator, declspecs, 1,
8972 attributes, prefix_attributes);
8975 /* Look for __unused__ attribute */
8976 if (TREE_USED (TREE_TYPE (decl)))
8977 TREE_USED (decl) = 1;
8978 finish_decl (decl, init, NULL_TREE);
8981 cp_error ("invalid declarator");
8984 innermost_code = TREE_CODE (decl);
8985 if (decl_context == FIELD && ctype == NULL_TREE)
8986 ctype = current_class_type;
8988 && TREE_OPERAND (decl, 0)
8989 && (TREE_CODE (TREE_OPERAND (decl, 0)) == TYPE_DECL
8990 && ((DECL_NAME (TREE_OPERAND (decl, 0))
8991 == constructor_name_full (ctype))
8992 || (DECL_NAME (TREE_OPERAND (decl, 0))
8993 == constructor_name (ctype)))))
8994 TREE_OPERAND (decl, 0) = constructor_name (ctype);
8995 next = &TREE_OPERAND (decl, 0);
8997 if (ctype != NULL_TREE
8998 && decl != NULL_TREE && flags != DTOR_FLAG
8999 && decl == constructor_name (ctype))
9001 return_type = return_ctor;
9002 ctor_return_type = ctype;
9007 case TEMPLATE_ID_EXPR:
9009 tree fns = TREE_OPERAND (decl, 0);
9011 if (TREE_CODE (fns) == LOOKUP_EXPR)
9012 fns = TREE_OPERAND (fns, 0);
9015 if (TREE_CODE (dname) == COMPONENT_REF)
9016 dname = TREE_OPERAND (dname, 1);
9017 if (TREE_CODE (dname) != IDENTIFIER_NODE)
9019 my_friendly_assert (is_overloaded_fn (dname),
9021 dname = DECL_NAME (get_first_fn (dname));
9026 case IDENTIFIER_NODE:
9027 if (TREE_CODE (decl) == IDENTIFIER_NODE)
9034 cp_error ("declarator-id missing; using reserved word `%D'",
9036 name = IDENTIFIER_POINTER (dname);
9038 if (! IDENTIFIER_OPNAME_P (dname)
9039 /* GNU/Linux headers use '__op'. Arrgh. */
9040 || (IDENTIFIER_TYPENAME_P (dname) && ! TREE_TYPE (dname)))
9041 name = IDENTIFIER_POINTER (dname);
9044 if (IDENTIFIER_TYPENAME_P (dname))
9046 my_friendly_assert (flags == NO_SPECIAL, 154);
9047 flags = TYPENAME_FLAG;
9048 ctor_return_type = TREE_TYPE (dname);
9049 return_type = return_conversion;
9051 name = operator_name_string (dname);
9058 /* Perform error checking, and decide on a ctype. */
9059 tree cname = TREE_OPERAND (decl, 0);
9060 if (cname == NULL_TREE)
9062 else if (TREE_CODE (cname) == NAMESPACE_DECL)
9065 in_namespace = TREE_OPERAND (decl, 0);
9066 TREE_OPERAND (decl, 0) = NULL_TREE;
9068 else if (! is_aggr_type (cname, 1))
9069 TREE_OPERAND (decl, 0) = NULL_TREE;
9070 /* Must test TREE_OPERAND (decl, 1), in case user gives
9071 us `typedef (class::memfunc)(int); memfunc *memfuncptr;' */
9072 else if (TREE_OPERAND (decl, 1)
9073 && TREE_CODE (TREE_OPERAND (decl, 1)) == INDIRECT_REF)
9075 else if (TREE_CODE (cname) == TEMPLATE_TYPE_PARM
9076 || TREE_CODE (cname) == TEMPLATE_TEMPLATE_PARM)
9078 cp_error ("`%T::%D' is not a valid declarator", cname,
9079 TREE_OPERAND (decl, 1));
9080 cp_error (" perhaps you want `typename %T::%D' to make it a type",
9081 cname, TREE_OPERAND (decl, 1));
9082 return void_type_node;
9084 else if (ctype == NULL_TREE)
9086 else if (TREE_COMPLEXITY (decl) == current_class_depth)
9087 TREE_OPERAND (decl, 0) = ctype;
9090 if (! UNIQUELY_DERIVED_FROM_P (cname, ctype))
9092 cp_error ("type `%T' is not derived from type `%T'",
9094 TREE_OPERAND (decl, 0) = NULL_TREE;
9100 if (ctype && TREE_CODE (TREE_OPERAND (decl, 1)) == TYPE_DECL
9101 && ((DECL_NAME (TREE_OPERAND (decl, 1))
9102 == constructor_name_full (ctype))
9103 || (DECL_NAME (TREE_OPERAND (decl, 1))
9104 == constructor_name (ctype))))
9105 TREE_OPERAND (decl, 1) = constructor_name (ctype);
9106 next = &TREE_OPERAND (decl, 1);
9110 if (TREE_CODE (decl) == IDENTIFIER_NODE
9111 && constructor_name (ctype) == decl)
9113 return_type = return_ctor;
9114 ctor_return_type = ctype;
9116 else if (TREE_CODE (decl) == BIT_NOT_EXPR
9117 && TREE_CODE (TREE_OPERAND (decl, 0)) == IDENTIFIER_NODE
9118 && (constructor_name (ctype) == TREE_OPERAND (decl, 0)
9119 || constructor_name_full (ctype) == TREE_OPERAND (decl, 0)))
9121 return_type = return_dtor;
9122 ctor_return_type = ctype;
9124 TREE_OPERAND (decl, 0) = constructor_name (ctype);
9125 next = &TREE_OPERAND (decl, 0);
9136 /* Parse error puts this typespec where
9137 a declarator should go. */
9138 cp_error ("`%T' specified as declarator-id", DECL_NAME (decl));
9139 if (TREE_TYPE (decl) == current_class_type)
9140 cp_error (" perhaps you want `%T' for a constructor",
9141 current_class_name);
9142 dname = DECL_NAME (decl);
9143 name = IDENTIFIER_POINTER (dname);
9145 /* Avoid giving two errors for this. */
9146 IDENTIFIER_CLASS_VALUE (dname) = NULL_TREE;
9148 declspecs = temp_tree_cons (NULL_TREE, integer_type_node,
9155 cp_compiler_error ("`%D' as declarator", decl);
9156 return 0; /* We used to do a 155 abort here. */
9161 /* A function definition's declarator must have the form of
9162 a function declarator. */
9164 if (funcdef_flag && innermost_code != CALL_EXPR)
9167 if (((dname && IDENTIFIER_OPNAME_P (dname)) || flags == TYPENAME_FLAG)
9168 && innermost_code != CALL_EXPR
9169 && ! (ctype && declspecs == NULL_TREE))
9171 cp_error ("declaration of `%D' as non-function", dname);
9172 return void_type_node;
9175 /* Anything declared one level down from the top level
9176 must be one of the parameters of a function
9177 (because the body is at least two levels down). */
9179 /* This heuristic cannot be applied to C++ nodes! Fixed, however,
9180 by not allowing C++ class definitions to specify their parameters
9181 with xdecls (must be spec.d in the parmlist).
9183 Since we now wait to push a class scope until we are sure that
9184 we are in a legitimate method context, we must set oldcname
9185 explicitly (since current_class_name is not yet alive).
9187 We also want to avoid calling this a PARM if it is in a namespace. */
9189 if (decl_context == NORMAL && !toplevel_bindings_p ())
9191 struct binding_level *b = current_binding_level;
9192 current_binding_level = b->level_chain;
9193 if (current_binding_level != 0 && toplevel_bindings_p ())
9194 decl_context = PARM;
9195 current_binding_level = b;
9199 name = decl_context == PARM ? "parameter" : "type name";
9201 /* Look through the decl specs and record which ones appear.
9202 Some typespecs are defined as built-in typenames.
9203 Others, the ones that are modifiers of other types,
9204 are represented by bits in SPECBITS: set the bits for
9205 the modifiers that appear. Storage class keywords are also in SPECBITS.
9207 If there is a typedef name or a type, store the type in TYPE.
9208 This includes builtin typedefs such as `int'.
9210 Set EXPLICIT_INT if the type is `int' or `char' and did not
9211 come from a user typedef.
9213 Set LONGLONG if `long' is mentioned twice.
9215 For C++, constructors and destructors have their own fast treatment. */
9217 for (spec = declspecs; spec; spec = TREE_CHAIN (spec))
9222 /* Certain parse errors slip through. For example,
9223 `int class;' is not caught by the parser. Try
9224 weakly to recover here. */
9225 if (TREE_CODE (spec) != TREE_LIST)
9228 id = TREE_VALUE (spec);
9230 if (TREE_CODE (id) == IDENTIFIER_NODE)
9232 if (id == ridpointers[(int) RID_INT]
9233 || id == ridpointers[(int) RID_CHAR]
9234 || id == ridpointers[(int) RID_BOOL]
9235 || id == ridpointers[(int) RID_WCHAR])
9239 if (id == ridpointers[(int) RID_BOOL])
9240 error ("`bool' is now a keyword");
9242 cp_error ("extraneous `%T' ignored", id);
9246 if (id == ridpointers[(int) RID_INT])
9248 else if (id == ridpointers[(int) RID_CHAR])
9250 type = TREE_TYPE (IDENTIFIER_GLOBAL_VALUE (id));
9254 /* C++ aggregate types. */
9255 if (IDENTIFIER_HAS_TYPE_VALUE (id))
9258 cp_error ("multiple declarations `%T' and `%T'", type, id);
9260 type = IDENTIFIER_TYPE_VALUE (id);
9264 for (i = (int) RID_FIRST_MODIFIER; i <= (int) RID_LAST_MODIFIER; i++)
9266 if (ridpointers[i] == id)
9268 if (i == (int) RID_LONG && RIDBIT_SETP (i, specbits))
9270 if (pedantic && ! in_system_header && warn_long_long)
9271 pedwarn ("ANSI C++ does not support `long long'");
9273 error ("`long long long' is too long for GCC");
9277 else if (RIDBIT_SETP (i, specbits))
9278 pedwarn ("duplicate `%s'", IDENTIFIER_POINTER (id));
9279 RIDBIT_SET (i, specbits);
9284 /* C++ aggregate types. */
9285 else if (TREE_CODE (id) == TYPE_DECL || TREE_CODE (id) == TEMPLATE_DECL)
9288 cp_error ("multiple declarations `%T' and `%T'", type,
9292 type = TREE_TYPE (id);
9293 TREE_VALUE (spec) = type;
9298 error ("two or more data types in declaration of `%s'", name);
9299 else if (TREE_CODE (id) == IDENTIFIER_NODE)
9301 register tree t = lookup_name (id, 1);
9302 if (!t || TREE_CODE (t) != TYPE_DECL)
9303 error ("`%s' fails to be a typedef or built in type",
9304 IDENTIFIER_POINTER (id));
9307 type = TREE_TYPE (t);
9309 /* See the code below that used this. */
9310 decl_machine_attr = DECL_MACHINE_ATTRIBUTES (id);
9315 else if (id != error_mark_node)
9316 /* Can't change CLASS nodes into RECORD nodes here! */
9322 typedef_type = type;
9324 /* No type at all: default to `int', and set DEFAULTED_INT
9325 because it was not a user-defined typedef. */
9327 if (type == NULL_TREE
9328 && (RIDBIT_SETP (RID_SIGNED, specbits)
9329 || RIDBIT_SETP (RID_UNSIGNED, specbits)
9330 || RIDBIT_SETP (RID_LONG, specbits)
9331 || RIDBIT_SETP (RID_SHORT, specbits)))
9333 /* These imply 'int'. */
9334 type = integer_type_node;
9338 if (type == NULL_TREE)
9341 if (return_type == return_dtor)
9342 type = void_type_node;
9343 else if (return_type == return_ctor)
9344 type = build_pointer_type (ctor_return_type);
9345 else if (return_type == return_conversion)
9346 type = ctor_return_type;
9349 /* We handle `main' specially here, because 'main () { }' is so
9350 common. With no options, it is allowed. With -Wreturn-type,
9351 it is a warning. It is only an error with -pedantic-errors. */
9352 int is_main = (funcdef_flag
9353 && MAIN_NAME_P (dname)
9354 && ctype == NULL_TREE
9355 && in_namespace == NULL_TREE
9356 && current_namespace == global_namespace);
9358 if (in_system_header || flag_ms_extensions)
9359 /* Allow it, sigh. */;
9360 else if (pedantic || ! is_main)
9361 cp_pedwarn ("ANSI C++ forbids declaration of `%s' with no type",
9363 else if (warn_return_type)
9364 cp_warning ("ANSI C++ forbids declaration of `%s' with no type",
9367 type = integer_type_node;
9370 else if (return_type == return_dtor)
9372 error ("return type specification for destructor invalid");
9373 type = void_type_node;
9375 else if (return_type == return_ctor)
9377 error ("return type specification for constructor invalid");
9378 type = build_pointer_type (ctor_return_type);
9380 else if (return_type == return_conversion)
9382 if (!same_type_p (type, ctor_return_type))
9383 cp_error ("operator `%T' declared to return `%T'",
9384 ctor_return_type, type);
9386 cp_pedwarn ("return type specified for `operator %T'",
9389 type = ctor_return_type;
9394 /* Now process the modifiers that were specified
9395 and check for invalid combinations. */
9397 /* Long double is a special combination. */
9399 if (RIDBIT_SETP (RID_LONG, specbits)
9400 && TYPE_MAIN_VARIANT (type) == double_type_node)
9402 RIDBIT_RESET (RID_LONG, specbits);
9403 type = build_qualified_type (long_double_type_node,
9404 CP_TYPE_QUALS (type));
9407 /* Check all other uses of type modifiers. */
9409 if (RIDBIT_SETP (RID_UNSIGNED, specbits)
9410 || RIDBIT_SETP (RID_SIGNED, specbits)
9411 || RIDBIT_SETP (RID_LONG, specbits)
9412 || RIDBIT_SETP (RID_SHORT, specbits))
9416 if (TREE_CODE (type) == REAL_TYPE)
9417 error ("short, signed or unsigned invalid for `%s'", name);
9418 else if (TREE_CODE (type) != INTEGER_TYPE)
9419 error ("long, short, signed or unsigned invalid for `%s'", name);
9420 else if (RIDBIT_SETP (RID_LONG, specbits)
9421 && RIDBIT_SETP (RID_SHORT, specbits))
9422 error ("long and short specified together for `%s'", name);
9423 else if ((RIDBIT_SETP (RID_LONG, specbits)
9424 || RIDBIT_SETP (RID_SHORT, specbits))
9426 error ("long or short specified with char for `%s'", name);
9427 else if ((RIDBIT_SETP (RID_LONG, specbits)
9428 || RIDBIT_SETP (RID_SHORT, specbits))
9429 && TREE_CODE (type) == REAL_TYPE)
9430 error ("long or short specified with floating type for `%s'", name);
9431 else if (RIDBIT_SETP (RID_SIGNED, specbits)
9432 && RIDBIT_SETP (RID_UNSIGNED, specbits))
9433 error ("signed and unsigned given together for `%s'", name);
9437 if (!explicit_int && !defaulted_int && !explicit_char && pedantic)
9439 pedwarn ("long, short, signed or unsigned used invalidly for `%s'",
9441 if (flag_pedantic_errors)
9446 /* Discard the type modifiers if they are invalid. */
9449 RIDBIT_RESET (RID_UNSIGNED, specbits);
9450 RIDBIT_RESET (RID_SIGNED, specbits);
9451 RIDBIT_RESET (RID_LONG, specbits);
9452 RIDBIT_RESET (RID_SHORT, specbits);
9457 if (RIDBIT_SETP (RID_COMPLEX, specbits)
9458 && TREE_CODE (type) != INTEGER_TYPE && TREE_CODE (type) != REAL_TYPE)
9460 error ("complex invalid for `%s'", name);
9461 RIDBIT_RESET (RID_COMPLEX, specbits);
9464 /* Decide whether an integer type is signed or not.
9465 Optionally treat bitfields as signed by default. */
9466 if (RIDBIT_SETP (RID_UNSIGNED, specbits)
9469 It is implementation-defined whether a plain (neither
9470 explicitly signed or unsigned) char, short, int, or long
9471 bit-field is signed or unsigned.
9473 Naturally, we extend this to long long as well. Note that
9474 this does not include wchar_t. */
9475 || (bitfield && !flag_signed_bitfields
9476 && RIDBIT_NOTSETP (RID_SIGNED, specbits)
9477 /* A typedef for plain `int' without `signed' can be
9478 controlled just like plain `int', but a typedef for
9479 `signed int' cannot be so controlled. */
9481 && C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl))
9482 && (TREE_CODE (type) == INTEGER_TYPE
9483 || TREE_CODE (type) == CHAR_TYPE)
9484 && !same_type_p (TYPE_MAIN_VARIANT (type), wchar_type_node)))
9487 type = long_long_unsigned_type_node;
9488 else if (RIDBIT_SETP (RID_LONG, specbits))
9489 type = long_unsigned_type_node;
9490 else if (RIDBIT_SETP (RID_SHORT, specbits))
9491 type = short_unsigned_type_node;
9492 else if (type == char_type_node)
9493 type = unsigned_char_type_node;
9494 else if (typedef_decl)
9495 type = unsigned_type (type);
9497 type = unsigned_type_node;
9499 else if (RIDBIT_SETP (RID_SIGNED, specbits)
9500 && type == char_type_node)
9501 type = signed_char_type_node;
9503 type = long_long_integer_type_node;
9504 else if (RIDBIT_SETP (RID_LONG, specbits))
9505 type = long_integer_type_node;
9506 else if (RIDBIT_SETP (RID_SHORT, specbits))
9507 type = short_integer_type_node;
9509 if (RIDBIT_SETP (RID_COMPLEX, specbits))
9511 /* If we just have "complex", it is equivalent to
9512 "complex double", but if any modifiers at all are specified it is
9513 the complex form of TYPE. E.g, "complex short" is
9514 "complex short int". */
9516 if (defaulted_int && ! longlong
9517 && ! (RIDBIT_SETP (RID_LONG, specbits)
9518 || RIDBIT_SETP (RID_SHORT, specbits)
9519 || RIDBIT_SETP (RID_SIGNED, specbits)
9520 || RIDBIT_SETP (RID_UNSIGNED, specbits)))
9521 type = complex_double_type_node;
9522 else if (type == integer_type_node)
9523 type = complex_integer_type_node;
9524 else if (type == float_type_node)
9525 type = complex_float_type_node;
9526 else if (type == double_type_node)
9527 type = complex_double_type_node;
9528 else if (type == long_double_type_node)
9529 type = complex_long_double_type_node;
9531 type = build_complex_type (type);
9534 if (return_type == return_conversion
9535 && (RIDBIT_SETP (RID_CONST, specbits)
9536 || RIDBIT_SETP (RID_VOLATILE, specbits)
9537 || RIDBIT_SETP (RID_RESTRICT, specbits)))
9538 cp_error ("qualifiers are not allowed on declaration of `operator %T'",
9541 /* Set CONSTP if this declaration is `const', whether by
9542 explicit specification or via a typedef.
9543 Likewise for VOLATILEP. */
9545 constp = !! RIDBIT_SETP (RID_CONST, specbits) + CP_TYPE_CONST_P (type);
9547 !! RIDBIT_SETP (RID_RESTRICT, specbits) + CP_TYPE_RESTRICT_P (type);
9549 !! RIDBIT_SETP (RID_VOLATILE, specbits) + CP_TYPE_VOLATILE_P (type);
9550 type_quals = ((constp ? TYPE_QUAL_CONST : 0)
9551 | (restrictp ? TYPE_QUAL_RESTRICT : 0)
9552 | (volatilep ? TYPE_QUAL_VOLATILE : 0));
9553 type = cp_build_qualified_type (type, type_quals);
9555 inlinep = !! RIDBIT_SETP (RID_INLINE, specbits);
9556 virtualp = RIDBIT_SETP (RID_VIRTUAL, specbits);
9557 RIDBIT_RESET (RID_VIRTUAL, specbits);
9558 explicitp = RIDBIT_SETP (RID_EXPLICIT, specbits) != 0;
9559 RIDBIT_RESET (RID_EXPLICIT, specbits);
9561 if (RIDBIT_SETP (RID_STATIC, specbits))
9562 staticp = 1 + (decl_context == FIELD);
9564 if (virtualp && staticp == 2)
9566 cp_error ("member `%D' cannot be declared both virtual and static",
9570 friendp = RIDBIT_SETP (RID_FRIEND, specbits);
9571 RIDBIT_RESET (RID_FRIEND, specbits);
9573 /* Warn if two storage classes are given. Default to `auto'. */
9575 if (RIDBIT_ANY_SET (specbits))
9577 if (RIDBIT_SETP (RID_STATIC, specbits)) nclasses++;
9578 if (RIDBIT_SETP (RID_EXTERN, specbits)) nclasses++;
9579 if (decl_context == PARM && nclasses > 0)
9580 error ("storage class specifiers invalid in parameter declarations");
9581 if (RIDBIT_SETP (RID_TYPEDEF, specbits))
9583 if (decl_context == PARM)
9584 error ("typedef declaration invalid in parameter declaration");
9587 if (RIDBIT_SETP (RID_AUTO, specbits)) nclasses++;
9588 if (RIDBIT_SETP (RID_REGISTER, specbits)) nclasses++;
9591 /* Give error if `virtual' is used outside of class declaration. */
9593 && (current_class_name == NULL_TREE || decl_context != FIELD))
9595 error ("virtual outside class declaration");
9599 /* Static anonymous unions are dealt with here. */
9600 if (staticp && decl_context == TYPENAME
9601 && TREE_CODE (declspecs) == TREE_LIST
9602 && ANON_AGGR_TYPE_P (TREE_VALUE (declspecs)))
9603 decl_context = FIELD;
9605 /* Warn about storage classes that are invalid for certain
9606 kinds of declarations (parameters, typenames, etc.). */
9609 error ("multiple storage classes in declaration of `%s'", name);
9610 else if (decl_context != NORMAL && nclasses > 0)
9612 if ((decl_context == PARM || decl_context == CATCHPARM)
9613 && (RIDBIT_SETP (RID_REGISTER, specbits)
9614 || RIDBIT_SETP (RID_AUTO, specbits)))
9616 else if (RIDBIT_SETP (RID_TYPEDEF, specbits))
9618 else if (decl_context == FIELD
9619 /* C++ allows static class elements */
9620 && RIDBIT_SETP (RID_STATIC, specbits))
9621 /* C++ also allows inlines and signed and unsigned elements,
9622 but in those cases we don't come in here. */
9626 if (decl_context == FIELD)
9628 tree tmp = NULL_TREE;
9629 register int op = 0;
9633 /* Avoid trying to get an operand off an identifier node. */
9634 if (TREE_CODE (declarator) == IDENTIFIER_NODE)
9637 tmp = TREE_OPERAND (declarator, 0);
9638 op = IDENTIFIER_OPNAME_P (tmp);
9640 error ("storage class specified for %s `%s'",
9641 op ? "member operator" : "field",
9642 op ? operator_name_string (tmp) : name);
9645 error (((decl_context == PARM || decl_context == CATCHPARM)
9646 ? "storage class specified for parameter `%s'"
9647 : "storage class specified for typename"), name);
9648 RIDBIT_RESET (RID_REGISTER, specbits);
9649 RIDBIT_RESET (RID_AUTO, specbits);
9650 RIDBIT_RESET (RID_EXTERN, specbits);
9653 else if (RIDBIT_SETP (RID_EXTERN, specbits) && initialized && !funcdef_flag)
9655 if (toplevel_bindings_p ())
9657 /* It's common practice (and completely valid) to have a const
9658 be initialized and declared extern. */
9659 if (!(type_quals & TYPE_QUAL_CONST))
9660 warning ("`%s' initialized and declared `extern'", name);
9663 error ("`%s' has both `extern' and initializer", name);
9665 else if (RIDBIT_SETP (RID_EXTERN, specbits) && funcdef_flag
9666 && ! toplevel_bindings_p ())
9667 error ("nested function `%s' declared `extern'", name);
9668 else if (toplevel_bindings_p ())
9670 if (RIDBIT_SETP (RID_AUTO, specbits))
9671 error ("top-level declaration of `%s' specifies `auto'", name);
9674 if (nclasses > 0 && friendp)
9675 error ("storage class specifiers invalid in friend function declarations");
9677 /* Now figure out the structure of the declarator proper.
9678 Descend through it, creating more complex types, until we reach
9679 the declared identifier (or NULL_TREE, in an absolute declarator). */
9681 inner_attrs = NULL_TREE;
9684 while (declarator && TREE_CODE (declarator) != IDENTIFIER_NODE
9685 && TREE_CODE (declarator) != TEMPLATE_ID_EXPR)
9687 /* Each level of DECLARATOR is either an ARRAY_REF (for ...[..]),
9688 an INDIRECT_REF (for *...),
9689 a CALL_EXPR (for ...(...)),
9690 an identifier (for the name being declared)
9691 or a null pointer (for the place in an absolute declarator
9692 where the name was omitted).
9693 For the last two cases, we have just exited the loop.
9695 For C++ it could also be
9696 a SCOPE_REF (for class :: ...). In this case, we have converted
9697 sensible names to types, and those are the values we use to
9698 qualify the member name.
9699 an ADDR_EXPR (for &...),
9700 a BIT_NOT_EXPR (for destructors)
9702 At this point, TYPE is the type of elements of an array,
9703 or for a function to return, or for a pointer to point to.
9704 After this sequence of ifs, TYPE is the type of the
9705 array or function or pointer, and DECLARATOR has had its
9706 outermost layer removed. */
9708 if (type == error_mark_node)
9710 if (TREE_CODE (declarator) == SCOPE_REF)
9711 declarator = TREE_OPERAND (declarator, 1);
9713 declarator = TREE_OPERAND (declarator, 0);
9716 if (quals != NULL_TREE
9717 && (declarator == NULL_TREE
9718 || TREE_CODE (declarator) != SCOPE_REF))
9720 if (ctype == NULL_TREE && TREE_CODE (type) == METHOD_TYPE)
9721 ctype = TYPE_METHOD_BASETYPE (type);
9722 if (ctype != NULL_TREE)
9724 tree dummy = build_decl (TYPE_DECL, NULL_TREE, type);
9725 ctype = grok_method_quals (ctype, dummy, quals);
9726 type = TREE_TYPE (dummy);
9731 /* See the comment for the TREE_LIST case, below. */
9734 else if (inner_attrs)
9736 decl_attributes (type, inner_attrs, NULL_TREE);
9737 inner_attrs = NULL_TREE;
9740 switch (TREE_CODE (declarator))
9744 /* We encode a declarator with embedded attributes using
9745 a TREE_LIST. The attributes apply to the declarator
9746 directly inside them, so we have to skip an iteration
9747 before applying them to the type. If the declarator just
9748 inside is the declarator-id, we apply the attrs to the
9750 inner_attrs = TREE_PURPOSE (declarator);
9752 declarator = TREE_VALUE (declarator);
9758 register tree itype = NULL_TREE;
9759 register tree size = TREE_OPERAND (declarator, 1);
9760 /* The index is a signed object `sizetype' bits wide. */
9761 tree index_type = signed_type (sizetype);
9763 declarator = TREE_OPERAND (declarator, 0);
9765 /* Check for some types that there cannot be arrays of. */
9767 if (TREE_CODE (type) == VOID_TYPE)
9769 cp_error ("declaration of `%D' as array of voids", dname);
9770 type = error_mark_node;
9773 if (TREE_CODE (type) == FUNCTION_TYPE)
9775 cp_error ("declaration of `%D' as array of functions", dname);
9776 type = error_mark_node;
9779 /* ARM $8.4.3: Since you can't have a pointer to a reference,
9780 you can't have arrays of references. If we allowed them,
9781 then we'd be saying x[i] is valid for an array x, but
9782 then you'd have to ask: what does `*(x + i)' mean? */
9783 if (TREE_CODE (type) == REFERENCE_TYPE)
9785 if (decl_context == TYPENAME)
9786 cp_error ("cannot make arrays of references");
9788 cp_error ("declaration of `%D' as array of references",
9790 type = error_mark_node;
9793 if (TREE_CODE (type) == OFFSET_TYPE)
9795 cp_error ("declaration of `%D' as array of data members",
9797 type = error_mark_node;
9800 if (TREE_CODE (type) == METHOD_TYPE)
9802 cp_error ("declaration of `%D' as array of function members",
9804 type = error_mark_node;
9807 if (size == error_mark_node)
9808 type = error_mark_node;
9809 else if (TREE_CODE (type) == ARRAY_TYPE && !TYPE_DOMAIN (type))
9813 the constant expressions that specify the bounds of
9814 the arrays can be omitted only for the first member
9816 cp_error ("declaration of `%D' as multidimensional array",
9818 cp_error ("must have bounds for all dimensions except the first");
9819 type = error_mark_node;
9822 if (type == error_mark_node)
9825 /* VC++ spells a zero-sized array with []. */
9826 if (size == NULL_TREE && decl_context == FIELD && ! staticp
9827 && ! RIDBIT_SETP (RID_TYPEDEF, specbits))
9828 size = integer_zero_node;
9832 /* Must suspend_momentary here because the index
9833 type may need to live until the end of the function.
9834 For example, it is used in the declaration of a
9835 variable which requires destructing at the end of
9836 the function; then build_vec_delete will need this
9838 int yes = suspend_momentary ();
9839 /* Might be a cast. */
9840 if (TREE_CODE (size) == NOP_EXPR
9841 && TREE_TYPE (size) == TREE_TYPE (TREE_OPERAND (size, 0)))
9842 size = TREE_OPERAND (size, 0);
9843 if (TREE_READONLY_DECL_P (size))
9844 size = decl_constant_value (size);
9846 /* If this involves a template parameter, it will be a
9847 constant at instantiation time, but we don't know
9848 what the value is yet. Even if no template
9849 parameters are involved, we may an expression that
9850 is not a constant; we don't even simplify `1 + 2'
9851 when processing a template. */
9852 if (processing_template_decl)
9854 /* Resolve a qualified reference to an enumerator or
9855 static const data member of ours. */
9856 if (TREE_CODE (size) == SCOPE_REF
9857 && TREE_OPERAND (size, 0) == current_class_type)
9859 tree t = lookup_field (current_class_type,
9860 TREE_OPERAND (size, 1), 0, 0);
9865 itype = build_index_type (build_min
9866 (MINUS_EXPR, sizetype, size, integer_one_node));
9867 goto dont_grok_size;
9870 if (TREE_CODE (TREE_TYPE (size)) != INTEGER_TYPE
9871 && TREE_CODE (TREE_TYPE (size)) != ENUMERAL_TYPE
9872 && TREE_CODE (TREE_TYPE (size)) != BOOLEAN_TYPE)
9874 cp_error ("size of array `%D' has non-integer type",
9876 size = integer_one_node;
9878 if (pedantic && integer_zerop (size))
9879 cp_pedwarn ("ANSI C++ forbids zero-size array `%D'", dname);
9880 if (TREE_CONSTANT (size))
9882 int old_flag_pedantic_errors = flag_pedantic_errors;
9883 int old_pedantic = pedantic;
9884 pedantic = flag_pedantic_errors = 1;
9885 /* Always give overflow errors on array subscripts. */
9886 constant_expression_warning (size);
9887 pedantic = old_pedantic;
9888 flag_pedantic_errors = old_flag_pedantic_errors;
9889 if (INT_CST_LT (size, integer_zero_node))
9891 cp_error ("size of array `%D' is negative", dname);
9892 size = integer_one_node;
9900 cp_pedwarn ("ANSI C++ forbids variable-size array `%D'",
9903 cp_pedwarn ("ANSI C++ forbids variable-size array");
9908 = fold (build_binary_op (MINUS_EXPR,
9909 cp_convert (index_type, size),
9910 cp_convert (index_type,
9911 integer_one_node)));
9912 if (! TREE_CONSTANT (itype))
9913 itype = variable_size (itype);
9914 else if (TREE_OVERFLOW (itype))
9916 error ("overflow in array dimension");
9917 TREE_OVERFLOW (itype) = 0;
9920 itype = build_index_type (itype);
9923 resume_momentary (yes);
9926 type = build_cplus_array_type (type, itype);
9935 tree inner_parms = CALL_DECLARATOR_PARMS (declarator);
9936 tree inner_decl = TREE_OPERAND (declarator, 0);
9938 /* Declaring a function type.
9939 Make sure we have a valid type for the function to return. */
9941 /* We now know that the TYPE_QUALS don't apply to the
9942 decl, but to its return type. */
9943 type_quals = TYPE_UNQUALIFIED;
9945 /* Warn about some types functions can't return. */
9947 if (TREE_CODE (type) == FUNCTION_TYPE)
9949 error ("`%s' declared as function returning a function", name);
9950 type = integer_type_node;
9952 if (TREE_CODE (type) == ARRAY_TYPE)
9954 error ("`%s' declared as function returning an array", name);
9955 type = integer_type_node;
9958 if (inner_decl && TREE_CODE (inner_decl) == SCOPE_REF)
9959 inner_decl = TREE_OPERAND (inner_decl, 1);
9961 if (inner_decl && TREE_CODE (inner_decl) == TEMPLATE_ID_EXPR)
9964 /* Pick up type qualifiers which should be applied to `this'. */
9965 quals = CALL_DECLARATOR_QUALS (declarator);
9967 /* Pick up the exception specifications. */
9968 raises = CALL_DECLARATOR_EXCEPTION_SPEC (declarator);
9970 /* Say it's a definition only for the CALL_EXPR
9971 closest to the identifier. */
9974 && (TREE_CODE (inner_decl) == IDENTIFIER_NODE
9975 || TREE_CODE (inner_decl) == TEMPLATE_ID_EXPR
9976 || TREE_CODE (inner_decl) == BIT_NOT_EXPR);
9978 if (ctype == NULL_TREE
9979 && decl_context == FIELD
9981 && (friendp == 0 || dname == current_class_name))
9982 ctype = current_class_type;
9984 if (ctype && return_type == return_conversion)
9985 TYPE_HAS_CONVERSION (ctype) = 1;
9986 if (ctype && constructor_name (ctype) == dname)
9988 /* We are within a class's scope. If our declarator name
9989 is the same as the class name, and we are defining
9990 a function, then it is a constructor/destructor, and
9991 therefore returns a void type. */
9993 if (flags == DTOR_FLAG)
9995 /* ANSI C++ June 5 1992 WP 12.4.1. A destructor may
9996 not be declared const or volatile. A destructor
9997 may not be static. */
9999 error ("destructor cannot be static member function");
10002 cp_error ("destructors may not be `%s'",
10003 IDENTIFIER_POINTER (TREE_VALUE (quals)));
10006 if (decl_context == FIELD)
10008 if (! member_function_or_else (ctype, current_class_type,
10009 "destructor for alien class `%s' cannot be a member"))
10010 return void_type_node;
10013 else /* It's a constructor. */
10015 if (explicitp == 1)
10017 /* ANSI C++ June 5 1992 WP 12.1.2. A constructor may
10018 not be declared const or volatile. A constructor may
10019 not be virtual. A constructor may not be static. */
10021 error ("constructor cannot be static member function");
10024 pedwarn ("constructors cannot be declared virtual");
10029 cp_error ("constructors may not be `%s'",
10030 IDENTIFIER_POINTER (TREE_VALUE (quals)));
10034 RID_BIT_TYPE tmp_bits;
10035 bcopy ((void*)&specbits, (void*)&tmp_bits, sizeof (RID_BIT_TYPE));
10036 RIDBIT_RESET (RID_INLINE, tmp_bits);
10037 RIDBIT_RESET (RID_STATIC, tmp_bits);
10038 if (RIDBIT_ANY_SET (tmp_bits))
10039 error ("return value type specifier for constructor ignored");
10041 type = build_pointer_type (ctype);
10042 if (decl_context == FIELD)
10044 if (! member_function_or_else (ctype, current_class_type,
10045 "constructor for alien class `%s' cannot be member"))
10046 return void_type_node;
10047 TYPE_HAS_CONSTRUCTOR (ctype) = 1;
10048 if (return_type != return_ctor)
10052 if (decl_context == FIELD)
10058 error ("can't initialize friend function `%s'", name);
10061 /* Cannot be both friend and virtual. */
10062 error ("virtual functions cannot be friends");
10063 RIDBIT_RESET (RID_FRIEND, specbits);
10066 if (decl_context == NORMAL)
10067 error ("friend declaration not in class definition");
10068 if (current_function_decl && funcdef_flag)
10069 cp_error ("can't define friend function `%s' in a local class definition",
10073 /* Construct the function type and go to the next
10074 inner layer of declarator. */
10076 declarator = TREE_OPERAND (declarator, 0);
10078 /* FIXME: This is where default args should be fully
10081 arg_types = grokparms (inner_parms, funcdecl_p ? funcdef_flag : 0);
10083 if (declarator && flags == DTOR_FLAG)
10085 /* A destructor declared in the body of a class will
10086 be represented as a BIT_NOT_EXPR. But, we just
10087 want the underlying IDENTIFIER. */
10088 if (TREE_CODE (declarator) == BIT_NOT_EXPR)
10089 declarator = TREE_OPERAND (declarator, 0);
10091 if (strict_prototype == 0 && arg_types == NULL_TREE)
10092 arg_types = void_list_node;
10093 else if (arg_types == NULL_TREE
10094 || arg_types != void_list_node)
10096 cp_error ("destructors may not have parameters");
10097 arg_types = void_list_node;
10098 last_function_parms = NULL_TREE;
10102 /* ANSI says that `const int foo ();'
10103 does not make the function foo const. */
10104 type = build_function_type (type, arg_types);
10108 for (t = arg_types; t; t = TREE_CHAIN (t))
10109 if (TREE_PURPOSE (t)
10110 && TREE_CODE (TREE_PURPOSE (t)) == DEFAULT_ARG)
10112 add_defarg_fn (type);
10121 /* Filter out pointers-to-references and references-to-references.
10122 We can get these if a TYPE_DECL is used. */
10124 if (TREE_CODE (type) == REFERENCE_TYPE)
10126 error ("cannot declare %s to references",
10127 TREE_CODE (declarator) == ADDR_EXPR
10128 ? "references" : "pointers");
10129 declarator = TREE_OPERAND (declarator, 0);
10133 if (TREE_CODE (type) == OFFSET_TYPE
10134 && (TREE_CODE (TREE_TYPE (type)) == VOID_TYPE
10135 || TREE_CODE (TREE_TYPE (type)) == REFERENCE_TYPE))
10137 cp_error ("cannot declare pointer to `%#T' member",
10139 type = TREE_TYPE (type);
10142 /* Merge any constancy or volatility into the target type
10143 for the pointer. */
10145 /* We now know that the TYPE_QUALS don't apply to the decl,
10146 but to the target of the pointer. */
10147 type_quals = TYPE_UNQUALIFIED;
10149 if (TREE_CODE (declarator) == ADDR_EXPR)
10151 if (TREE_CODE (type) == VOID_TYPE)
10152 error ("invalid type: `void &'");
10154 type = build_reference_type (type);
10156 else if (TREE_CODE (type) == METHOD_TYPE)
10157 type = build_ptrmemfunc_type (build_pointer_type (type));
10159 type = build_pointer_type (type);
10161 /* Process a list of type modifier keywords (such as
10162 const or volatile) that were given inside the `*' or `&'. */
10164 if (TREE_TYPE (declarator))
10166 register tree typemodlist;
10172 for (typemodlist = TREE_TYPE (declarator); typemodlist;
10173 typemodlist = TREE_CHAIN (typemodlist))
10175 tree qualifier = TREE_VALUE (typemodlist);
10177 if (qualifier == ridpointers[(int) RID_CONST])
10179 else if (qualifier == ridpointers[(int) RID_VOLATILE])
10181 else if (qualifier == ridpointers[(int) RID_RESTRICT])
10186 error ("invalid type modifier within pointer declarator");
10190 pedwarn ("duplicate `const'");
10192 pedwarn ("duplicate `volatile'");
10194 pedwarn ("duplicate `restrict'");
10196 type_quals = ((constp ? TYPE_QUAL_CONST : 0)
10197 | (restrictp ? TYPE_QUAL_RESTRICT : 0)
10198 | (volatilep ? TYPE_QUAL_VOLATILE : 0));
10199 if (TREE_CODE (declarator) == ADDR_EXPR
10200 && (constp || volatilep))
10203 pedwarn ("discarding `const' applied to a reference");
10205 pedwarn ("discarding `volatile' applied to a reference");
10206 type_quals &= ~(TYPE_QUAL_CONST | TYPE_QUAL_VOLATILE);
10208 type = cp_build_qualified_type (type, type_quals);
10210 declarator = TREE_OPERAND (declarator, 0);
10216 /* We have converted type names to NULL_TREE if the
10217 name was bogus, or to a _TYPE node, if not.
10219 The variable CTYPE holds the type we will ultimately
10220 resolve to. The code here just needs to build
10221 up appropriate member types. */
10222 tree sname = TREE_OPERAND (declarator, 1);
10225 /* Destructors can have their visibilities changed as well. */
10226 if (TREE_CODE (sname) == BIT_NOT_EXPR)
10227 sname = TREE_OPERAND (sname, 0);
10229 if (TREE_COMPLEXITY (declarator) == 0)
10230 /* This needs to be here, in case we are called
10231 multiple times. */ ;
10232 else if (TREE_COMPLEXITY (declarator) == -1)
10233 /* Namespace member. */
10234 pop_decl_namespace ();
10235 else if (friendp && (TREE_COMPLEXITY (declarator) < 2))
10236 /* Don't fall out into global scope. Hides real bug? --eichin */ ;
10237 else if (! IS_AGGR_TYPE_CODE
10238 (TREE_CODE (TREE_OPERAND (declarator, 0))))
10240 else if (TREE_COMPLEXITY (declarator) == current_class_depth)
10242 /* Resolve any TYPENAME_TYPEs from the decl-specifier-seq
10243 that refer to ctype. They couldn't be resolved earlier
10244 because we hadn't pushed into the class yet.
10245 Example: resolve 'B<T>::type' in
10246 'B<typename B<T>::type> B<T>::f () { }'. */
10247 if (current_template_parms
10248 && uses_template_parms (type)
10249 && uses_template_parms (current_class_type))
10251 tree args = current_template_args ();
10252 type = tsubst (type, args, /*complain=*/1, NULL_TREE);
10255 /* This pop_nested_class corresponds to the
10256 push_nested_class used to push into class scope for
10257 parsing the argument list of a function decl, in
10259 pop_nested_class ();
10260 TREE_COMPLEXITY (declarator) = current_class_depth;
10263 my_friendly_abort (16);
10265 if (TREE_OPERAND (declarator, 0) == NULL_TREE)
10267 /* We had a reference to a global decl, or
10268 perhaps we were given a non-aggregate typedef,
10269 in which case we cleared this out, and should just
10270 keep going as though it wasn't there. */
10271 declarator = sname;
10274 ctype = TREE_OPERAND (declarator, 0);
10277 while (t != NULL_TREE && CLASS_TYPE_P (t))
10279 if (CLASSTYPE_TEMPLATE_INFO (t) &&
10280 !CLASSTYPE_TEMPLATE_SPECIALIZATION (t))
10281 template_count += 1;
10282 t = TYPE_MAIN_DECL (t);
10283 if (DECL_LANG_SPECIFIC (t))
10284 t = DECL_CLASS_CONTEXT (t);
10289 if (sname == NULL_TREE)
10292 if (TREE_CODE (sname) == IDENTIFIER_NODE)
10294 /* This is the `standard' use of the scoping operator:
10295 basetype :: member . */
10297 if (ctype == current_class_type)
10303 Is this ill-formed? */
10306 cp_pedwarn ("extra qualification `%T::' on member `%s' ignored",
10309 else if (TREE_CODE (type) == FUNCTION_TYPE)
10311 if (current_class_type == NULL_TREE
10313 type = build_cplus_method_type (ctype, TREE_TYPE (type),
10314 TYPE_ARG_TYPES (type));
10317 cp_error ("cannot declare member function `%T::%s' within `%T'",
10318 ctype, name, current_class_type);
10319 return void_type_node;
10322 else if (RIDBIT_SETP (RID_TYPEDEF, specbits)
10323 || TYPE_SIZE (complete_type (ctype)) != NULL_TREE)
10325 /* Have to move this code elsewhere in this function.
10326 this code is used for i.e., typedef int A::M; M *pm;
10328 It is? How? jason 10/2/94 */
10330 if (current_class_type)
10332 cp_error ("cannot declare member `%T::%s' within `%T'",
10333 ctype, name, current_class_type);
10334 return void_type_node;
10336 type = build_offset_type (ctype, type);
10338 else if (uses_template_parms (ctype))
10340 if (TREE_CODE (type) == FUNCTION_TYPE)
10342 = build_cplus_method_type (ctype, TREE_TYPE (type),
10343 TYPE_ARG_TYPES (type));
10347 cp_error ("structure `%T' not yet defined", ctype);
10348 return error_mark_node;
10351 declarator = sname;
10353 else if (TREE_CODE (sname) == SCOPE_REF)
10354 my_friendly_abort (17);
10358 declarator = TREE_OPERAND (declarator, 1);
10359 if (declarator && TREE_CODE (declarator) == CALL_EXPR)
10360 /* In this case, we will deal with it later. */
10364 if (TREE_CODE (type) == FUNCTION_TYPE)
10365 type = build_cplus_method_type (ctype, TREE_TYPE (type),
10366 TYPE_ARG_TYPES (type));
10368 type = build_offset_type (ctype, type);
10375 declarator = TREE_OPERAND (declarator, 0);
10380 case ENUMERAL_TYPE:
10381 declarator = NULL_TREE;
10385 declarator = NULL_TREE;
10389 my_friendly_abort (158);
10393 /* See the comment for the TREE_LIST case, above. */
10396 if (! ignore_attrs)
10397 decl_attributes (type, inner_attrs, NULL_TREE);
10399 TREE_VALUE (attrlist) = chainon (inner_attrs, TREE_VALUE (attrlist));
10401 attrlist = build_decl_list (NULL_TREE, inner_attrs);
10404 /* Now TYPE has the actual type. */
10406 if (explicitp == 1 || (explicitp && friendp))
10408 /* [dcl.fct.spec] The explicit specifier shall only be used in
10409 declarations of constructors within a class definition. */
10410 error ("only declarations of constructors can be `explicit'");
10414 if (RIDBIT_SETP (RID_MUTABLE, specbits))
10416 if (current_class_name == NULL_TREE || decl_context == PARM || friendp)
10418 error ("non-member `%s' cannot be declared `mutable'", name);
10419 RIDBIT_RESET (RID_MUTABLE, specbits);
10421 else if (decl_context == TYPENAME || RIDBIT_SETP (RID_TYPEDEF, specbits))
10423 error ("non-object member `%s' cannot be declared `mutable'", name);
10424 RIDBIT_RESET (RID_MUTABLE, specbits);
10426 else if (TREE_CODE (type) == FUNCTION_TYPE
10427 || TREE_CODE (type) == METHOD_TYPE)
10429 error ("function `%s' cannot be declared `mutable'", name);
10430 RIDBIT_RESET (RID_MUTABLE, specbits);
10434 error ("static `%s' cannot be declared `mutable'", name);
10435 RIDBIT_RESET (RID_MUTABLE, specbits);
10437 else if (type_quals & TYPE_QUAL_CONST)
10439 error ("const `%s' cannot be declared `mutable'", name);
10440 RIDBIT_RESET (RID_MUTABLE, specbits);
10444 if (declarator == NULL_TREE
10445 || TREE_CODE (declarator) == IDENTIFIER_NODE
10446 || (TREE_CODE (declarator) == TEMPLATE_ID_EXPR
10447 && (TREE_CODE (type) == FUNCTION_TYPE
10448 || TREE_CODE (type) == METHOD_TYPE)))
10450 else if (TREE_CODE (declarator) == TEMPLATE_ID_EXPR)
10452 cp_error ("template-id `%D' used as a declarator", declarator);
10453 declarator = dname;
10456 /* Unexpected declarator format. */
10457 my_friendly_abort (990210);
10459 /* If this is declaring a typedef name, return a TYPE_DECL. */
10461 if (RIDBIT_SETP (RID_TYPEDEF, specbits) && decl_context != TYPENAME)
10465 /* Note that the grammar rejects storage classes
10466 in typenames, fields or parameters. */
10467 if (current_lang_name == lang_name_java)
10468 TYPE_FOR_JAVA (type) = 1;
10470 if (decl_context == FIELD)
10472 if (declarator == constructor_name (current_class_type))
10473 cp_pedwarn ("ANSI C++ forbids nested type `%D' with same name as enclosing class",
10475 decl = build_lang_decl (TYPE_DECL, declarator, type);
10479 /* Make sure this typedef lives as long as its type,
10480 since it might be used as a template parameter. */
10481 if (type != error_mark_node)
10482 push_obstacks (TYPE_OBSTACK (type), TYPE_OBSTACK (type));
10483 if (processing_template_decl)
10484 decl = build_lang_decl (TYPE_DECL, declarator, type);
10486 decl = build_decl (TYPE_DECL, declarator, type);
10487 if (type != error_mark_node)
10491 /* If the user declares "typedef struct {...} foo" then the
10492 struct will have an anonymous name. Fill that name in now.
10493 Nothing can refer to it, so nothing needs know about the name
10495 if (type != error_mark_node
10496 && TYPE_NAME (type)
10497 && TREE_CODE (TYPE_NAME (type)) == TYPE_DECL
10498 && ANON_AGGRNAME_P (TYPE_IDENTIFIER (type))
10499 && CP_TYPE_QUALS (type) == TYPE_UNQUALIFIED)
10501 tree oldname = TYPE_NAME (type);
10504 /* Replace the anonymous name with the real name everywhere. */
10505 lookup_tag_reverse (type, declarator);
10506 for (t = TYPE_MAIN_VARIANT (type); t; t = TYPE_NEXT_VARIANT (t))
10507 if (TYPE_NAME (t) == oldname)
10508 TYPE_NAME (t) = decl;
10510 if (TYPE_LANG_SPECIFIC (type))
10511 TYPE_WAS_ANONYMOUS (type) = 1;
10513 /* If this is a typedef within a template class, the nested
10514 type is a (non-primary) template. The name for the
10515 template needs updating as well. */
10516 if (TYPE_LANG_SPECIFIC (type) && CLASSTYPE_TEMPLATE_INFO (type))
10517 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type))
10518 = TYPE_IDENTIFIER (type);
10520 /* XXX Temporarily set the scope.
10521 When returning, start_decl expects it as NULL_TREE,
10522 and will then then set it using pushdecl. */
10523 my_friendly_assert (DECL_CONTEXT (decl) == NULL_TREE, 980404);
10524 if (current_class_type)
10525 DECL_CONTEXT (decl) = current_class_type;
10527 DECL_CONTEXT (decl) = FROB_CONTEXT (current_namespace);
10529 DECL_ASSEMBLER_NAME (decl) = DECL_NAME (decl);
10530 DECL_ASSEMBLER_NAME (decl)
10531 = get_identifier (build_overload_name (type, 1, 1));
10532 DECL_CONTEXT (decl) = NULL_TREE;
10534 /* FIXME remangle member functions; member functions of a
10535 type with external linkage have external linkage. */
10538 if (TREE_CODE (type) == OFFSET_TYPE || TREE_CODE (type) == METHOD_TYPE)
10540 cp_error_at ("typedef name may not be class-qualified", decl);
10545 if (ctype == NULL_TREE)
10547 if (TREE_CODE (type) != METHOD_TYPE)
10548 cp_error_at ("invalid type qualifier for non-method type", decl);
10550 ctype = TYPE_METHOD_BASETYPE (type);
10552 if (ctype != NULL_TREE)
10553 grok_method_quals (ctype, decl, quals);
10556 if (RIDBIT_SETP (RID_SIGNED, specbits)
10557 || (typedef_decl && C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl)))
10558 C_TYPEDEF_EXPLICITLY_SIGNED (decl) = 1;
10560 bad_specifiers (decl, "type", virtualp, quals != NULL_TREE,
10561 inlinep, friendp, raises != NULL_TREE);
10564 error ("typedef declaration includes an initializer");
10569 /* Detect the case of an array type of unspecified size
10570 which came, as such, direct from a typedef name.
10571 We must copy the type, so that each identifier gets
10572 a distinct type, so that each identifier's size can be
10573 controlled separately by its own initializer. */
10575 if (type == typedef_type && TREE_CODE (type) == ARRAY_TYPE
10576 && TYPE_DOMAIN (type) == NULL_TREE)
10578 type = build_cplus_array_type (TREE_TYPE (type), TYPE_DOMAIN (type));
10581 /* If this is a type name (such as, in a cast or sizeof),
10582 compute the type and return it now. */
10584 if (decl_context == TYPENAME)
10586 /* Note that the grammar rejects storage classes
10587 in typenames, fields or parameters. */
10588 if (type_quals != TYPE_UNQUALIFIED)
10589 type_quals = TYPE_UNQUALIFIED;
10591 /* Special case: "friend class foo" looks like a TYPENAME context. */
10594 if (type_quals != TYPE_UNQUALIFIED)
10596 cp_error ("type qualifiers specified for friend class declaration");
10597 type_quals = TYPE_UNQUALIFIED;
10601 cp_error ("`inline' specified for friend class declaration");
10605 /* Only try to do this stuff if we didn't already give up. */
10606 if (type != integer_type_node)
10608 /* A friendly class? */
10609 if (current_class_type)
10610 make_friend_class (current_class_type, TYPE_MAIN_VARIANT (type));
10612 error ("trying to make class `%s' a friend of global scope",
10613 TYPE_NAME_STRING (type));
10614 type = void_type_node;
10619 tree dummy = build_decl (TYPE_DECL, declarator, type);
10620 if (ctype == NULL_TREE)
10622 my_friendly_assert (TREE_CODE (type) == METHOD_TYPE, 159);
10623 ctype = TYPE_METHOD_BASETYPE (type);
10625 grok_method_quals (ctype, dummy, quals);
10626 type = TREE_TYPE (dummy);
10631 else if (declarator == NULL_TREE && decl_context != PARM
10632 && decl_context != CATCHPARM
10633 && TREE_CODE (type) != UNION_TYPE
10636 cp_error ("abstract declarator `%T' used as declaration", type);
10637 declarator = make_anon_name ();
10640 /* `void' at top level (not within pointer)
10641 is allowed only in typedefs or type names.
10642 We don't complain about parms either, but that is because
10643 a better error message can be made later. */
10645 if (TREE_CODE (type) == VOID_TYPE && decl_context != PARM)
10648 error ("unnamed variable or field declared void");
10649 else if (TREE_CODE (declarator) == IDENTIFIER_NODE)
10651 if (IDENTIFIER_OPNAME_P (declarator))
10652 my_friendly_abort (356);
10654 error ("variable or field `%s' declared void", name);
10657 error ("variable or field declared void");
10658 type = integer_type_node;
10661 /* Now create the decl, which may be a VAR_DECL, a PARM_DECL
10662 or a FUNCTION_DECL, depending on DECL_CONTEXT and TYPE. */
10664 if (decl_context == PARM || decl_context == CATCHPARM)
10666 if (ctype || in_namespace)
10667 error ("cannot use `::' in parameter declaration");
10669 /* A parameter declared as an array of T is really a pointer to T.
10670 One declared as a function is really a pointer to a function.
10671 One declared as a member is really a pointer to member. */
10673 if (TREE_CODE (type) == ARRAY_TYPE)
10675 /* Transfer const-ness of array into that of type pointed to. */
10676 type = build_pointer_type (TREE_TYPE (type));
10677 type_quals = TYPE_UNQUALIFIED;
10679 else if (TREE_CODE (type) == FUNCTION_TYPE)
10680 type = build_pointer_type (type);
10681 else if (TREE_CODE (type) == OFFSET_TYPE)
10682 type = build_pointer_type (type);
10683 else if (TREE_CODE (type) == VOID_TYPE && declarator)
10685 error ("declaration of `%s' as void", name);
10691 register tree decl;
10693 if (decl_context == PARM)
10695 decl = build_decl (PARM_DECL, declarator, type);
10697 bad_specifiers (decl, "parameter", virtualp, quals != NULL_TREE,
10698 inlinep, friendp, raises != NULL_TREE);
10700 /* Compute the type actually passed in the parmlist,
10701 for the case where there is no prototype.
10702 (For example, shorts and chars are passed as ints.)
10703 When there is a prototype, this is overridden later. */
10705 DECL_ARG_TYPE (decl) = type_promotes_to (type);
10707 else if (decl_context == FIELD)
10709 if (type == error_mark_node)
10711 /* Happens when declaring arrays of sizes which
10712 are error_mark_node, for example. */
10715 else if (in_namespace && !friendp)
10717 /* Something like struct S { int N::j; }; */
10718 cp_error ("invalid use of `::'");
10721 else if (TREE_CODE (type) == FUNCTION_TYPE)
10724 tree function_context;
10726 /* We catch the others as conflicts with the builtin
10728 if (friendp && declarator == ridpointers[(int) RID_SIGNED])
10730 cp_error ("function `%D' cannot be declared friend",
10737 if (ctype == NULL_TREE)
10738 ctype = current_class_type;
10740 if (ctype == NULL_TREE)
10742 cp_error ("can't make `%D' into a method -- not in a class",
10744 return void_type_node;
10747 /* ``A union may [ ... ] not [ have ] virtual functions.''
10749 if (virtualp && TREE_CODE (ctype) == UNION_TYPE)
10751 cp_error ("function `%D' declared virtual inside a union",
10753 return void_type_node;
10756 if (declarator == ansi_opname[(int) NEW_EXPR]
10757 || declarator == ansi_opname[(int) VEC_NEW_EXPR]
10758 || declarator == ansi_opname[(int) DELETE_EXPR]
10759 || declarator == ansi_opname[(int) VEC_DELETE_EXPR])
10763 cp_error ("`%D' cannot be declared virtual, since it is always static",
10768 else if (staticp < 2)
10769 type = build_cplus_method_type (ctype, TREE_TYPE (type),
10770 TYPE_ARG_TYPES (type));
10773 /* Tell grokfndecl if it needs to set TREE_PUBLIC on the node. */
10774 function_context = (ctype != NULL_TREE) ?
10775 hack_decl_function_context (TYPE_MAIN_DECL (ctype)) : NULL_TREE;
10776 publicp = (! friendp || ! staticp)
10777 && function_context == NULL_TREE;
10778 decl = grokfndecl (ctype, type,
10779 TREE_CODE (declarator) != TEMPLATE_ID_EXPR
10780 ? declarator : dname,
10782 virtualp, flags, quals, raises,
10783 friendp ? -1 : 0, friendp, publicp, inlinep,
10784 funcdef_flag, template_count, in_namespace);
10785 if (decl == NULL_TREE)
10788 /* This clobbers the attrs stored in `decl' from `attrlist'. */
10789 /* The decl and setting of decl_machine_attr is also turned off. */
10790 decl = build_decl_attribute_variant (decl, decl_machine_attr);
10793 /* [class.conv.ctor]
10795 A constructor declared without the function-specifier
10796 explicit that can be called with a single parameter
10797 specifies a conversion from the type of its first
10798 parameter to the type of its class. Such a constructor
10799 is called a converting constructor. */
10800 if (explicitp == 2)
10801 DECL_NONCONVERTING_P (decl) = 1;
10802 else if (DECL_CONSTRUCTOR_P (decl))
10804 /* The constructor can be called with exactly one
10805 parameter if there is at least one parameter, and
10806 any subsequent parameters have default arguments.
10807 We don't look at the first parameter, which is
10808 really just the `this' parameter for the new
10811 TREE_CHAIN (TYPE_ARG_TYPES (TREE_TYPE (decl)));
10813 /* Skip the `in_chrg' argument too, if present. */
10814 if (TYPE_USES_VIRTUAL_BASECLASSES (DECL_CONTEXT (decl)))
10815 arg_types = TREE_CHAIN (arg_types);
10817 if (arg_types == void_list_node
10819 && TREE_CHAIN (arg_types)
10820 && TREE_CHAIN (arg_types) != void_list_node
10821 && !TREE_PURPOSE (TREE_CHAIN (arg_types))))
10822 DECL_NONCONVERTING_P (decl) = 1;
10825 else if (TREE_CODE (type) == METHOD_TYPE)
10827 /* We only get here for friend declarations of
10828 members of other classes. */
10829 /* All method decls are public, so tell grokfndecl to set
10830 TREE_PUBLIC, also. */
10831 decl = grokfndecl (ctype, type, declarator, declarator,
10832 virtualp, flags, quals, raises,
10833 friendp ? -1 : 0, friendp, 1, 0, funcdef_flag,
10834 template_count, in_namespace);
10835 if (decl == NULL_TREE)
10838 else if (!staticp && ! processing_template_decl
10839 && TYPE_SIZE (complete_type (type)) == NULL_TREE
10840 && (TREE_CODE (type) != ARRAY_TYPE || initialized == 0))
10843 cp_error ("field `%D' has incomplete type", declarator);
10845 cp_error ("name `%T' has incomplete type", type);
10847 /* If we're instantiating a template, tell them which
10848 instantiation made the field's type be incomplete. */
10849 if (current_class_type
10850 && TYPE_NAME (current_class_type)
10851 && IDENTIFIER_TEMPLATE (TYPE_IDENTIFIER (current_class_type))
10852 && declspecs && TREE_VALUE (declspecs)
10853 && TREE_TYPE (TREE_VALUE (declspecs)) == type)
10854 cp_error (" in instantiation of template `%T'",
10855 current_class_type);
10857 type = error_mark_node;
10864 error ("`%s' is neither function nor method; cannot be declared friend",
10865 IDENTIFIER_POINTER (declarator));
10873 /* Friends are treated specially. */
10874 if (ctype == current_class_type)
10875 warning ("member functions are implicitly friends of their class");
10878 tree t = NULL_TREE;
10879 if (decl && DECL_NAME (decl))
10881 if (template_class_depth (current_class_type) == 0)
10884 = check_explicit_specialization
10886 template_count, 2 * (funcdef_flag != 0) + 4);
10887 if (decl == error_mark_node)
10888 return error_mark_node;
10891 t = do_friend (ctype, declarator, decl,
10892 last_function_parms, attrlist, flags, quals,
10895 if (t && funcdef_flag)
10898 return void_type_node;
10902 /* Structure field. It may not be a function, except for C++ */
10904 if (decl == NULL_TREE)
10910 /* An attempt is being made to initialize a non-static
10911 member. But, from [class.mem]:
10913 4 A member-declarator can contain a
10914 constant-initializer only if it declares a static
10915 member (_class.static_) of integral or enumeration
10916 type, see _class.static.data_.
10918 This used to be relatively common practice, but
10919 the rest of the compiler does not correctly
10920 handle the initialization unless the member is
10921 static so we make it static below. */
10922 cp_pedwarn ("ANSI C++ forbids initialization of member `%D'",
10924 cp_pedwarn ("making `%D' static", declarator);
10928 if (uses_template_parms (type))
10929 /* We'll check at instantiation time. */
10931 else if (check_static_variable_definition (declarator,
10933 /* If we just return the declaration, crashes
10934 will sometimes occur. We therefore return
10935 void_type_node, as if this was a friend
10936 declaration, to cause callers to completely
10937 ignore this declaration. */
10938 return void_type_node;
10941 /* 9.2p13 [class.mem] */
10942 if (declarator == constructor_name (current_class_type)
10943 /* Divergence from the standard: In extern "C", we
10944 allow non-static data members here, because C does
10945 and /usr/include/netinet/in.h uses that. */
10946 && (staticp || ! in_system_header))
10947 cp_pedwarn ("ANSI C++ forbids data member `%D' with same name as enclosing class",
10952 /* C++ allows static class members. All other work
10953 for this is done by grokfield. */
10954 decl = build_lang_decl (VAR_DECL, declarator, type);
10955 TREE_STATIC (decl) = 1;
10956 /* In class context, 'static' means public access. */
10957 TREE_PUBLIC (decl) = DECL_EXTERNAL (decl) = 1;
10961 decl = build_lang_decl (FIELD_DECL, declarator, type);
10962 if (RIDBIT_SETP (RID_MUTABLE, specbits))
10964 DECL_MUTABLE_P (decl) = 1;
10965 RIDBIT_RESET (RID_MUTABLE, specbits);
10969 bad_specifiers (decl, "field", virtualp, quals != NULL_TREE,
10970 inlinep, friendp, raises != NULL_TREE);
10973 else if (TREE_CODE (type) == FUNCTION_TYPE || TREE_CODE (type) == METHOD_TYPE)
10975 tree original_name;
10981 if (TREE_CODE (declarator) == TEMPLATE_ID_EXPR)
10982 original_name = dname;
10984 original_name = declarator;
10986 if (RIDBIT_SETP (RID_AUTO, specbits))
10987 error ("storage class `auto' invalid for function `%s'", name);
10988 else if (RIDBIT_SETP (RID_REGISTER, specbits))
10989 error ("storage class `register' invalid for function `%s'", name);
10991 /* Function declaration not at top level.
10992 Storage classes other than `extern' are not allowed
10993 and `extern' makes no difference. */
10994 if (! toplevel_bindings_p ()
10995 && (RIDBIT_SETP (RID_STATIC, specbits)
10996 || RIDBIT_SETP (RID_INLINE, specbits))
10999 if (RIDBIT_SETP (RID_STATIC, specbits))
11000 pedwarn ("storage class `static' invalid for function `%s' declared out of global scope", name);
11002 pedwarn ("storage class `inline' invalid for function `%s' declared out of global scope", name);
11005 if (ctype == NULL_TREE)
11009 error ("virtual non-class function `%s'", name);
11013 else if (TREE_CODE (type) == FUNCTION_TYPE && staticp < 2)
11014 type = build_cplus_method_type (ctype, TREE_TYPE (type),
11015 TYPE_ARG_TYPES (type));
11017 /* Record presence of `static'. */
11018 publicp = (ctype != NULL_TREE
11019 || RIDBIT_SETP (RID_EXTERN, specbits)
11020 || !RIDBIT_SETP (RID_STATIC, specbits));
11022 decl = grokfndecl (ctype, type, original_name, declarator,
11023 virtualp, flags, quals, raises,
11025 publicp, inlinep, funcdef_flag,
11026 template_count, in_namespace);
11027 if (decl == NULL_TREE)
11032 int illegal_static = 0;
11034 /* Don't allow a static member function in a class, and forbid
11035 declaring main to be static. */
11036 if (TREE_CODE (type) == METHOD_TYPE)
11038 cp_pedwarn ("cannot declare member function `%D' to have static linkage", decl);
11039 illegal_static = 1;
11041 else if (current_function_decl)
11043 /* FIXME need arm citation */
11044 error ("cannot declare static function inside another function");
11045 illegal_static = 1;
11048 if (illegal_static)
11051 RIDBIT_RESET (RID_STATIC, specbits);
11057 /* It's a variable. */
11059 /* An uninitialized decl with `extern' is a reference. */
11060 decl = grokvardecl (type, declarator, &specbits,
11062 (type_quals & TYPE_QUAL_CONST) != 0,
11064 bad_specifiers (decl, "variable", virtualp, quals != NULL_TREE,
11065 inlinep, friendp, raises != NULL_TREE);
11069 DECL_CONTEXT (decl) = ctype;
11072 cp_pedwarn ("static member `%D' re-declared as static", decl);
11074 RIDBIT_RESET (RID_STATIC, specbits);
11076 if (RIDBIT_SETP (RID_REGISTER, specbits) && TREE_STATIC (decl))
11078 cp_error ("static member `%D' declared `register'", decl);
11079 RIDBIT_RESET (RID_REGISTER, specbits);
11081 if (RIDBIT_SETP (RID_EXTERN, specbits) && pedantic)
11083 cp_pedwarn ("cannot explicitly declare member `%#D' to have extern linkage",
11085 RIDBIT_RESET (RID_EXTERN, specbits);
11090 my_friendly_assert (!RIDBIT_SETP (RID_MUTABLE, specbits), 19990927);
11092 /* Record `register' declaration for warnings on &
11093 and in case doing stupid register allocation. */
11095 if (RIDBIT_SETP (RID_REGISTER, specbits))
11096 DECL_REGISTER (decl) = 1;
11098 if (RIDBIT_SETP (RID_EXTERN, specbits))
11099 DECL_THIS_EXTERN (decl) = 1;
11101 if (RIDBIT_SETP (RID_STATIC, specbits))
11102 DECL_THIS_STATIC (decl) = 1;
11104 /* Record constancy and volatility. There's no need to do this
11105 when processing a template; we'll do this for the instantiated
11106 declaration based on the type of DECL. */
11107 if (!processing_template_decl)
11108 c_apply_type_quals_to_decl (type_quals, decl);
11114 /* Tell if a parmlist/exprlist looks like an exprlist or a parmlist.
11115 An empty exprlist is a parmlist. An exprlist which
11116 contains only identifiers at the global level
11117 is a parmlist. Otherwise, it is an exprlist. */
11120 parmlist_is_exprlist (exprs)
11123 if (exprs == NULL_TREE || TREE_PARMLIST (exprs))
11126 if (toplevel_bindings_p ())
11128 /* At the global level, if these are all identifiers,
11129 then it is a parmlist. */
11132 if (TREE_CODE (TREE_VALUE (exprs)) != IDENTIFIER_NODE)
11134 exprs = TREE_CHAIN (exprs);
11141 /* Subroutine of start_function. Ensure that each of the parameter
11142 types (as listed in PARMS) is complete, as is required for a
11143 function definition. */
11146 require_complete_types_for_parms (parms)
11151 tree type = TREE_TYPE (parms);
11152 if (TYPE_SIZE (complete_type (type)) == NULL_TREE)
11154 if (DECL_NAME (parms))
11155 error ("parameter `%s' has incomplete type",
11156 IDENTIFIER_POINTER (DECL_NAME (parms)));
11158 error ("parameter has incomplete type");
11159 TREE_TYPE (parms) = error_mark_node;
11162 layout_decl (parms, 0);
11164 parms = TREE_CHAIN (parms);
11168 /* Returns *TP if *TP is a local variable (or parameter). Returns
11169 NULL_TREE otherwise. */
11172 local_variable_p (tp)
11177 if ((TREE_CODE (t) == VAR_DECL
11178 /* A VAR_DECL with a context that is a _TYPE is a static data
11180 && !TYPE_P (CP_DECL_CONTEXT (t))
11181 /* Any other non-local variable must be at namespace scope. */
11182 && TREE_CODE (CP_DECL_CONTEXT (t)) != NAMESPACE_DECL)
11183 || (TREE_CODE (t) == PARM_DECL))
11189 /* Check that ARG, which is a default-argument expression for a
11190 parameter DECL, is legal. Returns ARG, or ERROR_MARK_NODE, if
11191 something goes wrong. DECL may also be a _TYPE node, rather than a
11192 DECL, if there is no DECL available. */
11195 check_default_argument (decl, arg)
11202 if (TREE_CODE (arg) == DEFAULT_ARG)
11203 /* We get a DEFAULT_ARG when looking at an in-class declaration
11204 with a default argument. Ignore the argument for now; we'll
11205 deal with it after the class is complete. */
11208 if (processing_template_decl || uses_template_parms (arg))
11209 /* We don't do anything checking until instantiation-time. Note
11210 that there may be uninstantiated arguments even for an
11211 instantiated function, since default arguments are not
11212 instantiated until they are needed. */
11221 decl_type = TREE_TYPE (decl);
11223 if (arg == error_mark_node
11224 || decl == error_mark_node
11225 || TREE_TYPE (arg) == error_mark_node
11226 || decl_type == error_mark_node)
11227 /* Something already went wrong. There's no need to check
11229 return error_mark_node;
11231 /* [dcl.fct.default]
11233 A default argument expression is implicitly converted to the
11235 if (!TREE_TYPE (arg)
11236 || !can_convert_arg (decl_type, TREE_TYPE (arg), arg))
11239 cp_error ("default argument for `%#D' has type `%T'",
11240 decl, TREE_TYPE (arg));
11242 cp_error ("default argument for parameter of type `%T' has type `%T'",
11243 decl_type, TREE_TYPE (arg));
11245 return error_mark_node;
11248 /* [dcl.fct.default]
11250 Local variables shall not be used in default argument
11253 The keyword `this' shall not be used in a default argument of a
11254 member function. */
11255 var = search_tree (&arg, local_variable_p);
11258 cp_error ("default argument `%E' uses local variable `%D'",
11260 return error_mark_node;
11267 /* Decode the list of parameter types for a function type.
11268 Given the list of things declared inside the parens,
11269 return a list of types.
11271 The list we receive can have three kinds of elements:
11272 an IDENTIFIER_NODE for names given without types,
11273 a TREE_LIST node for arguments given as typespecs or names with typespecs,
11274 or void_type_node, to mark the end of an argument list
11275 when additional arguments are not permitted (... was not used).
11277 FUNCDEF_FLAG is nonzero for a function definition, 0 for
11278 a mere declaration. A nonempty identifier-list gets an error message
11279 when FUNCDEF_FLAG is zero.
11280 If FUNCDEF_FLAG is 1, then parameter types must be complete.
11281 If FUNCDEF_FLAG is -1, then parameter types may be incomplete.
11283 If all elements of the input list contain types,
11284 we return a list of the types.
11285 If all elements contain no type (except perhaps a void_type_node
11286 at the end), we return a null list.
11287 If some have types and some do not, it is an error, and we
11288 return a null list.
11290 Also set last_function_parms to either
11291 a list of names (IDENTIFIER_NODEs) or a chain of PARM_DECLs.
11292 A list of names is converted to a chain of PARM_DECLs
11293 by store_parm_decls so that ultimately it is always a chain of decls.
11295 Note that in C++, parameters can take default values. These default
11296 values are in the TREE_PURPOSE field of the TREE_LIST. It is
11297 an error to specify default values which are followed by parameters
11298 that have no default values, or an ELLIPSES. For simplicities sake,
11299 only parameters which are specified with their types can take on
11303 grokparms (first_parm, funcdef_flag)
11307 tree result = NULL_TREE;
11308 tree decls = NULL_TREE;
11310 if (first_parm != NULL_TREE
11311 && TREE_CODE (TREE_VALUE (first_parm)) == IDENTIFIER_NODE)
11313 if (! funcdef_flag)
11314 pedwarn ("parameter names (without types) in function declaration");
11315 last_function_parms = first_parm;
11318 else if (first_parm != NULL_TREE
11319 && TREE_CODE (TREE_VALUE (first_parm)) != TREE_LIST
11320 && TREE_CODE (TREE_VALUE (first_parm)) != VOID_TYPE)
11321 my_friendly_abort (145);
11324 /* Types were specified. This is a list of declarators
11325 each represented as a TREE_LIST node. */
11326 register tree parm, chain;
11327 int any_init = 0, any_error = 0;
11329 if (first_parm != NULL_TREE)
11331 tree last_result = NULL_TREE;
11332 tree last_decl = NULL_TREE;
11334 for (parm = first_parm; parm != NULL_TREE; parm = chain)
11336 tree type = NULL_TREE, list_node = parm;
11337 register tree decl = TREE_VALUE (parm);
11338 tree init = TREE_PURPOSE (parm);
11340 chain = TREE_CHAIN (parm);
11341 /* @@ weak defense against parse errors. */
11342 if (TREE_CODE (decl) != VOID_TYPE
11343 && TREE_CODE (decl) != TREE_LIST)
11345 /* Give various messages as the need arises. */
11346 if (TREE_CODE (decl) == STRING_CST)
11347 cp_error ("invalid string constant `%E'", decl);
11348 else if (TREE_CODE (decl) == INTEGER_CST)
11349 error ("invalid integer constant in parameter list, did you forget to give parameter name?");
11353 if (TREE_CODE (decl) != VOID_TYPE)
11355 decl = grokdeclarator (TREE_VALUE (decl),
11356 TREE_PURPOSE (decl),
11357 PARM, init != NULL_TREE,
11359 if (! decl || TREE_TYPE (decl) == error_mark_node)
11362 /* Top-level qualifiers on the parameters are
11363 ignored for function types. */
11364 type = TYPE_MAIN_VARIANT (TREE_TYPE (decl));
11366 if (TREE_CODE (type) == VOID_TYPE)
11367 decl = void_type_node;
11368 else if (TREE_CODE (type) == METHOD_TYPE)
11370 if (DECL_NAME (decl))
11371 /* Cannot use the decl here because
11372 we don't have DECL_CONTEXT set up yet. */
11373 cp_error ("parameter `%D' invalidly declared method type",
11376 error ("parameter invalidly declared method type");
11377 type = build_pointer_type (type);
11378 TREE_TYPE (decl) = type;
11380 else if (TREE_CODE (type) == OFFSET_TYPE)
11382 if (DECL_NAME (decl))
11383 cp_error ("parameter `%D' invalidly declared offset type",
11386 error ("parameter invalidly declared offset type");
11387 type = build_pointer_type (type);
11388 TREE_TYPE (decl) = type;
11390 else if (abstract_virtuals_error (decl, type))
11391 any_error = 1; /* Seems like a good idea. */
11392 else if (POINTER_TYPE_P (type))
11395 while (POINTER_TYPE_P (t)
11396 || (TREE_CODE (t) == ARRAY_TYPE
11397 && TYPE_DOMAIN (t) != NULL_TREE))
11399 if (TREE_CODE (t) == ARRAY_TYPE)
11400 cp_error ("parameter type `%T' includes %s to array of unknown bound",
11402 TYPE_PTR_P (type) ? "pointer" : "reference");
11406 if (TREE_CODE (decl) == VOID_TYPE)
11408 if (result == NULL_TREE)
11410 result = void_list_node;
11411 last_result = result;
11415 TREE_CHAIN (last_result) = void_list_node;
11416 last_result = void_list_node;
11419 && (chain != void_list_node || TREE_CHAIN (chain)))
11420 error ("`void' in parameter list must be entire list");
11424 /* Since there is a prototype, args are passed in their own types. */
11425 DECL_ARG_TYPE (decl) = TREE_TYPE (decl);
11426 if (PROMOTE_PROTOTYPES
11427 && (TREE_CODE (type) == INTEGER_TYPE
11428 || TREE_CODE (type) == ENUMERAL_TYPE)
11429 && TYPE_PRECISION (type) < TYPE_PRECISION (integer_type_node))
11430 DECL_ARG_TYPE (decl) = integer_type_node;
11431 if (!any_error && init)
11434 init = check_default_argument (decl, init);
11439 if (decls == NULL_TREE)
11446 TREE_CHAIN (last_decl) = decl;
11449 list_node = tree_cons (init, type, NULL_TREE);
11450 if (result == NULL_TREE)
11452 result = list_node;
11453 last_result = result;
11457 TREE_CHAIN (last_result) = list_node;
11458 last_result = list_node;
11462 TREE_CHAIN (last_result) = NULL_TREE;
11463 /* If there are no parameters, and the function does not end
11464 with `...', then last_decl will be NULL_TREE. */
11465 if (last_decl != NULL_TREE)
11466 TREE_CHAIN (last_decl) = NULL_TREE;
11470 last_function_parms = decls;
11475 /* Called from the parser to update an element of TYPE_ARG_TYPES for some
11476 FUNCTION_TYPE with the newly parsed version of its default argument, which
11477 was previously digested as text. See snarf_defarg et al in lex.c. */
11480 replace_defarg (arg, init)
11483 if (! processing_template_decl
11484 && ! can_convert_arg (TREE_VALUE (arg), TREE_TYPE (init), init))
11485 cp_pedwarn ("invalid type `%T' for default argument to `%T'",
11486 TREE_TYPE (init), TREE_VALUE (arg));
11487 TREE_PURPOSE (arg) = init;
11494 tree t = FUNCTION_ARG_CHAIN (d);
11495 if (DECL_CONSTRUCTOR_P (d)
11496 && TYPE_USES_VIRTUAL_BASECLASSES (DECL_CONTEXT (d)))
11497 t = TREE_CHAIN (t);
11498 if (t && TREE_CODE (TREE_VALUE (t)) == REFERENCE_TYPE
11499 && (TYPE_MAIN_VARIANT (TREE_TYPE (TREE_VALUE (t)))
11500 == DECL_CLASS_CONTEXT (d))
11501 && (TREE_CHAIN (t) == NULL_TREE
11502 || TREE_CHAIN (t) == void_list_node
11503 || TREE_PURPOSE (TREE_CHAIN (t))))
11508 /* These memoizing functions keep track of special properties which
11509 a class may have. `grok_ctor_properties' notices whether a class
11510 has a constructor of the form X(X&), and also complains
11511 if the class has a constructor of the form X(X).
11512 `grok_op_properties' takes notice of the various forms of
11513 operator= which are defined, as well as what sorts of type conversion
11514 may apply. Both functions take a FUNCTION_DECL as an argument. */
11517 grok_ctor_properties (ctype, decl)
11520 tree parmtypes = FUNCTION_ARG_CHAIN (decl);
11521 tree parmtype = parmtypes ? TREE_VALUE (parmtypes) : void_type_node;
11523 /* When a type has virtual baseclasses, a magical first int argument is
11524 added to any ctor so we can tell if the class has been initialized
11525 yet. This could screw things up in this function, so we deliberately
11526 ignore the leading int if we're in that situation. */
11527 if (TYPE_USES_VIRTUAL_BASECLASSES (ctype))
11529 my_friendly_assert (parmtypes
11530 && TREE_VALUE (parmtypes) == integer_type_node,
11532 parmtypes = TREE_CHAIN (parmtypes);
11533 parmtype = TREE_VALUE (parmtypes);
11538 A non-template constructor for class X is a copy constructor if
11539 its first parameter is of type X&, const X&, volatile X& or const
11540 volatile X&, and either there are no other parameters or else all
11541 other parameters have default arguments. */
11542 if (TREE_CODE (parmtype) == REFERENCE_TYPE
11543 && TYPE_MAIN_VARIANT (TREE_TYPE (parmtype)) == ctype
11544 && (TREE_CHAIN (parmtypes) == NULL_TREE
11545 || TREE_CHAIN (parmtypes) == void_list_node
11546 || TREE_PURPOSE (TREE_CHAIN (parmtypes)))
11547 && !(DECL_TEMPLATE_INSTANTIATION (decl)
11548 && is_member_template (DECL_TI_TEMPLATE (decl))))
11550 TYPE_HAS_INIT_REF (ctype) = 1;
11551 if (CP_TYPE_CONST_P (TREE_TYPE (parmtype)))
11552 TYPE_HAS_CONST_INIT_REF (ctype) = 1;
11556 A declaration of a constructor for a class X is ill-formed if its
11557 first parameter is of type (optionally cv-qualified) X and either
11558 there are no other parameters or else all other parameters have
11561 We *don't* complain about member template instantiations that
11562 have this form, though; they can occur as we try to decide what
11563 constructor to use during overload resolution. Since overload
11564 resolution will never prefer such a constructor to the
11565 non-template copy constructor (which is either explicitly or
11566 implicitly defined), there's no need to worry about their
11567 existence. Theoretically, they should never even be
11568 instantiated, but that's hard to forestall. */
11569 else if (TYPE_MAIN_VARIANT (parmtype) == ctype
11570 && (TREE_CHAIN (parmtypes) == NULL_TREE
11571 || TREE_CHAIN (parmtypes) == void_list_node
11572 || TREE_PURPOSE (TREE_CHAIN (parmtypes)))
11573 && !(DECL_TEMPLATE_INSTANTIATION (decl)
11574 && is_member_template (DECL_TI_TEMPLATE (decl))))
11576 cp_error ("invalid constructor; you probably meant `%T (const %T&)'",
11578 SET_IDENTIFIER_ERROR_LOCUS (DECL_NAME (decl), ctype);
11581 else if (TREE_CODE (parmtype) == VOID_TYPE
11582 || TREE_PURPOSE (parmtypes) != NULL_TREE)
11583 TYPE_HAS_DEFAULT_CONSTRUCTOR (ctype) = 1;
11588 /* An operator with this name can be either unary or binary. */
11594 return (name == ansi_opname [(int) INDIRECT_REF]
11595 || name == ansi_opname [(int) ADDR_EXPR]
11596 || name == ansi_opname [(int) NEGATE_EXPR]
11597 || name == ansi_opname[(int) POSTINCREMENT_EXPR]
11598 || name == ansi_opname[(int) POSTDECREMENT_EXPR]
11599 || name == ansi_opname [(int) CONVERT_EXPR]);
11602 /* An operator with this name can only be unary. */
11608 return (name == ansi_opname [(int) TRUTH_NOT_EXPR]
11609 || name == ansi_opname [(int) BIT_NOT_EXPR]
11610 || name == ansi_opname [(int) COMPONENT_REF]
11611 || IDENTIFIER_TYPENAME_P (name));
11614 /* Do a little sanity-checking on how they declared their operator. */
11617 grok_op_properties (decl, virtualp, friendp)
11619 int virtualp, friendp;
11621 tree argtypes = TYPE_ARG_TYPES (TREE_TYPE (decl));
11622 int methodp = (TREE_CODE (TREE_TYPE (decl)) == METHOD_TYPE);
11623 tree name = DECL_NAME (decl);
11625 if (current_class_type == NULL_TREE)
11632 A user-declared copy assignment operator X::operator= is a
11633 non-static non-template member function of class X with
11634 exactly one parameter of type X, X&, const X&, volatile X& or
11635 const volatile X&. */
11636 if (name == ansi_opname[(int) MODIFY_EXPR]
11637 && !(DECL_TEMPLATE_INSTANTIATION (decl)
11638 && is_member_template (DECL_TI_TEMPLATE (decl))))
11640 else if (name == ansi_opname[(int) CALL_EXPR])
11641 TYPE_OVERLOADS_CALL_EXPR (current_class_type) = 1;
11642 else if (name == ansi_opname[(int) ARRAY_REF])
11643 TYPE_OVERLOADS_ARRAY_REF (current_class_type) = 1;
11644 else if (name == ansi_opname[(int) COMPONENT_REF]
11645 || name == ansi_opname[(int) MEMBER_REF])
11646 TYPE_OVERLOADS_ARROW (current_class_type) = 1;
11647 else if (name == ansi_opname[(int) NEW_EXPR])
11648 TYPE_GETS_NEW (current_class_type) |= 1;
11649 else if (name == ansi_opname[(int) DELETE_EXPR])
11650 TYPE_GETS_DELETE (current_class_type) |= 1;
11651 else if (name == ansi_opname[(int) VEC_NEW_EXPR])
11652 TYPE_GETS_NEW (current_class_type) |= 2;
11653 else if (name == ansi_opname[(int) VEC_DELETE_EXPR])
11654 TYPE_GETS_DELETE (current_class_type) |= 2;
11657 if (name == ansi_opname[(int) NEW_EXPR]
11658 || name == ansi_opname[(int) VEC_NEW_EXPR])
11660 /* When the compiler encounters the definition of A::operator new, it
11661 doesn't look at the class declaration to find out if it's static. */
11663 revert_static_member_fn (&decl, NULL, NULL);
11665 /* Take care of function decl if we had syntax errors. */
11666 if (argtypes == NULL_TREE)
11668 = build_function_type (ptr_type_node,
11669 hash_tree_chain (integer_type_node,
11672 TREE_TYPE (decl) = coerce_new_type (TREE_TYPE (decl));
11674 else if (name == ansi_opname[(int) DELETE_EXPR]
11675 || name == ansi_opname[(int) VEC_DELETE_EXPR])
11678 revert_static_member_fn (&decl, NULL, NULL);
11680 if (argtypes == NULL_TREE)
11682 = build_function_type (void_type_node,
11683 hash_tree_chain (ptr_type_node,
11687 TREE_TYPE (decl) = coerce_delete_type (TREE_TYPE (decl));
11689 if (! friendp && name == ansi_opname[(int) VEC_DELETE_EXPR]
11690 && (TREE_CHAIN (TYPE_ARG_TYPES (TREE_TYPE (decl)))
11691 != void_list_node))
11692 TYPE_VEC_DELETE_TAKES_SIZE (current_class_type) = 1;
11697 /* An operator function must either be a non-static member function
11698 or have at least one parameter of a class, a reference to a class,
11699 an enumeration, or a reference to an enumeration. 13.4.0.6 */
11700 if (! methodp || DECL_STATIC_FUNCTION_P (decl))
11702 if (IDENTIFIER_TYPENAME_P (name)
11703 || name == ansi_opname[(int) CALL_EXPR]
11704 || name == ansi_opname[(int) MODIFY_EXPR]
11705 || name == ansi_opname[(int) COMPONENT_REF]
11706 || name == ansi_opname[(int) ARRAY_REF])
11707 cp_error ("`%D' must be a nonstatic member function", decl);
11712 if (DECL_STATIC_FUNCTION_P (decl))
11713 cp_error ("`%D' must be either a non-static member function or a non-member function", decl);
11716 for (; TREE_CODE (TREE_VALUE (p)) != VOID_TYPE ; p = TREE_CHAIN (p))
11718 tree arg = TREE_VALUE (p);
11719 if (TREE_CODE (arg) == REFERENCE_TYPE)
11720 arg = TREE_TYPE (arg);
11722 /* This lets bad template code slip through. */
11723 if (IS_AGGR_TYPE (arg)
11724 || TREE_CODE (arg) == ENUMERAL_TYPE
11725 || TREE_CODE (arg) == TEMPLATE_TYPE_PARM
11726 || TREE_CODE (arg) == TEMPLATE_TEMPLATE_PARM)
11730 ("`%D' must have an argument of class or enumerated type",
11737 if (name == ansi_opname[(int) CALL_EXPR])
11738 return; /* No restrictions on args. */
11740 if (IDENTIFIER_TYPENAME_P (name) && ! DECL_TEMPLATE_INFO (decl))
11742 tree t = TREE_TYPE (name);
11743 if (TREE_CODE (t) == VOID_TYPE)
11744 pedwarn ("void is not a valid type conversion operator");
11745 else if (! friendp)
11747 int ref = (TREE_CODE (t) == REFERENCE_TYPE);
11748 const char *what = 0;
11750 t = TYPE_MAIN_VARIANT (TREE_TYPE (t));
11752 if (t == current_class_type)
11753 what = "the same type";
11754 /* Don't force t to be complete here. */
11755 else if (IS_AGGR_TYPE (t)
11757 && DERIVED_FROM_P (t, current_class_type))
11758 what = "a base class";
11761 warning ("conversion to %s%s will never use a type conversion operator",
11762 ref ? "a reference to " : "", what);
11766 if (name == ansi_opname[(int) MODIFY_EXPR])
11770 if (list_length (argtypes) != 3 && methodp)
11772 cp_error ("`%D' must take exactly one argument", decl);
11775 parmtype = TREE_VALUE (TREE_CHAIN (argtypes));
11777 if (copy_assignment_arg_p (parmtype, virtualp)
11780 TYPE_HAS_ASSIGN_REF (current_class_type) = 1;
11781 if (TREE_CODE (parmtype) != REFERENCE_TYPE
11782 || CP_TYPE_CONST_P (TREE_TYPE (parmtype)))
11783 TYPE_HAS_CONST_ASSIGN_REF (current_class_type) = 1;
11786 else if (name == ansi_opname[(int) COND_EXPR])
11789 cp_error ("ANSI C++ prohibits overloading operator ?:");
11791 else if (ambi_op_p (name))
11793 if (list_length (argtypes) == 2)
11795 else if (list_length (argtypes) == 3)
11797 if ((name == ansi_opname[(int) POSTINCREMENT_EXPR]
11798 || name == ansi_opname[(int) POSTDECREMENT_EXPR])
11799 && ! processing_template_decl
11800 && ! same_type_p (TREE_VALUE (TREE_CHAIN (argtypes)), integer_type_node))
11803 cp_error ("postfix `%D' must take `int' as its argument",
11807 ("postfix `%D' must take `int' as its second argument",
11814 cp_error ("`%D' must take either zero or one argument", decl);
11816 cp_error ("`%D' must take either one or two arguments", decl);
11819 /* More Effective C++ rule 6. */
11821 && (name == ansi_opname[(int) POSTINCREMENT_EXPR]
11822 || name == ansi_opname[(int) POSTDECREMENT_EXPR]))
11824 tree arg = TREE_VALUE (argtypes);
11825 tree ret = TREE_TYPE (TREE_TYPE (decl));
11826 if (methodp || TREE_CODE (arg) == REFERENCE_TYPE)
11827 arg = TREE_TYPE (arg);
11828 arg = TYPE_MAIN_VARIANT (arg);
11829 if (list_length (argtypes) == 2)
11831 if (TREE_CODE (ret) != REFERENCE_TYPE
11832 || !same_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (ret)),
11834 cp_warning ("prefix `%D' should return `%T'", decl,
11835 build_reference_type (arg));
11839 if (!same_type_p (TYPE_MAIN_VARIANT (ret), arg))
11840 cp_warning ("postfix `%D' should return `%T'", decl, arg);
11844 else if (unary_op_p (name))
11846 if (list_length (argtypes) != 2)
11849 cp_error ("`%D' must take `void'", decl);
11851 cp_error ("`%D' must take exactly one argument", decl);
11854 else /* if (binary_op_p (name)) */
11856 if (list_length (argtypes) != 3)
11859 cp_error ("`%D' must take exactly one argument", decl);
11861 cp_error ("`%D' must take exactly two arguments", decl);
11864 /* More Effective C++ rule 7. */
11866 && (name == ansi_opname [TRUTH_ANDIF_EXPR]
11867 || name == ansi_opname [TRUTH_ORIF_EXPR]
11868 || name == ansi_opname [COMPOUND_EXPR]))
11869 cp_warning ("user-defined `%D' always evaluates both arguments",
11873 /* Effective C++ rule 23. */
11875 && list_length (argtypes) == 3
11876 && (name == ansi_opname [PLUS_EXPR]
11877 || name == ansi_opname [MINUS_EXPR]
11878 || name == ansi_opname [TRUNC_DIV_EXPR]
11879 || name == ansi_opname [MULT_EXPR])
11880 && TREE_CODE (TREE_TYPE (TREE_TYPE (decl))) == REFERENCE_TYPE)
11881 cp_warning ("`%D' should return by value", decl);
11885 for (; argtypes != void_list_node ; argtypes = TREE_CHAIN (argtypes))
11886 if (TREE_PURPOSE (argtypes))
11888 TREE_PURPOSE (argtypes) = NULL_TREE;
11889 if (name == ansi_opname[(int) POSTINCREMENT_EXPR]
11890 || name == ansi_opname[(int) POSTDECREMENT_EXPR])
11893 cp_pedwarn ("`%D' cannot have default arguments", decl);
11896 cp_error ("`%D' cannot have default arguments", decl);
11901 static const char *
11903 enum tag_types code;
11916 my_friendly_abort (981122);
11920 /* Get the struct, enum or union (CODE says which) with tag NAME.
11921 Define the tag as a forward-reference if it is not defined.
11923 C++: If a class derivation is given, process it here, and report
11924 an error if multiple derivation declarations are not identical.
11926 If this is a definition, come in through xref_tag and only look in
11927 the current frame for the name (since C++ allows new names in any
11931 xref_tag (code_type_node, name, globalize)
11932 tree code_type_node;
11936 enum tag_types tag_code;
11937 enum tree_code code;
11939 register tree ref, t;
11940 struct binding_level *b = current_binding_level;
11942 tree attributes = NULL_TREE;
11943 tree context = NULL_TREE;
11945 /* If we are called from the parser, code_type_node will sometimes be a
11946 TREE_LIST. This indicates that the user wrote
11947 "class __attribute__ ((foo)) bar". Extract the attributes so we can
11949 if (TREE_CODE (code_type_node) == TREE_LIST)
11951 attributes = TREE_PURPOSE (code_type_node);
11952 code_type_node = TREE_VALUE (code_type_node);
11955 tag_code = (enum tag_types) TREE_INT_CST_LOW (code_type_node);
11960 code = RECORD_TYPE;
11966 code = ENUMERAL_TYPE;
11969 my_friendly_abort (18);
11972 /* If a cross reference is requested, look up the type
11973 already defined for this tag and return it. */
11974 if (TREE_CODE_CLASS (TREE_CODE (name)) == 't')
11977 name = TYPE_IDENTIFIER (t);
11981 t = IDENTIFIER_TYPE_VALUE (name);
11983 if (t && TREE_CODE (t) != code && TREE_CODE (t) != TEMPLATE_TYPE_PARM
11984 && TREE_CODE (t) != TEMPLATE_TEMPLATE_PARM)
11989 /* If we know we are defining this tag, only look it up in
11990 this scope and don't try to find it as a type. */
11991 ref = lookup_tag (code, name, b, 1);
11997 /* [dcl.type.elab] If the identifier resolves to a
11998 typedef-name or a template type-parameter, the
11999 elaborated-type-specifier is ill-formed. */
12000 if (t != TYPE_MAIN_VARIANT (t)
12001 || (CLASS_TYPE_P (t) && TYPE_WAS_ANONYMOUS (t)))
12002 cp_pedwarn ("using typedef-name `%D' after `%s'",
12003 TYPE_NAME (t), tag_name (tag_code));
12004 else if (TREE_CODE (t) == TEMPLATE_TYPE_PARM)
12005 cp_error ("using template type parameter `%T' after `%s'",
12006 t, tag_name (tag_code));
12011 ref = lookup_tag (code, name, b, 0);
12015 /* Try finding it as a type declaration. If that wins,
12017 ref = lookup_name (name, 1);
12019 if (ref != NULL_TREE
12020 && processing_template_decl
12021 && DECL_CLASS_TEMPLATE_P (ref)
12022 && template_class_depth (current_class_type) == 0)
12023 /* Since GLOBALIZE is true, we're declaring a global
12024 template, so we want this type. */
12025 ref = DECL_RESULT (ref);
12027 if (ref && TREE_CODE (ref) == TYPE_DECL
12028 && TREE_CODE (TREE_TYPE (ref)) == code)
12029 ref = TREE_TYPE (ref);
12034 if (ref && current_class_type
12035 && template_class_depth (current_class_type)
12036 && PROCESSING_REAL_TEMPLATE_DECL_P ())
12038 /* Since GLOBALIZE is non-zero, we are not looking at a
12039 definition of this tag. Since, in addition, we are currently
12040 processing a (member) template declaration of a template
12041 class, we must be very careful; consider:
12048 { template <class V>
12049 friend struct S1; };
12051 Here, the S2::S1 declaration should not be confused with the
12052 outer declaration. In particular, the inner version should
12053 have a template parameter of level 2, not level 1. This
12054 would be particularly important if the member declaration
12057 template <class V = U> friend struct S1;
12059 say, when we should tsubst into `U' when instantiating
12060 S2. On the other hand, when presented with:
12070 we must find the inner binding eventually. We
12071 accomplish this by making sure that the new type we
12072 create to represent this declaration has the right
12074 context = TYPE_CONTEXT (ref);
12079 push_obstacks_nochange ();
12083 /* If no such tag is yet defined, create a forward-reference node
12084 and record it as the "definition".
12085 When a real declaration of this type is found,
12086 the forward-reference will be altered into a real type. */
12088 /* In C++, since these migrate into the global scope, we must
12089 build them on the permanent obstack. */
12091 temp = allocation_temporary_p ();
12093 end_temporary_allocation ();
12095 if (code == ENUMERAL_TYPE)
12097 cp_error ("use of enum `%#D' without previous declaration", name);
12099 ref = make_node (ENUMERAL_TYPE);
12101 /* Give the type a default layout like unsigned int
12102 to avoid crashing if it does not get defined. */
12103 TYPE_MODE (ref) = TYPE_MODE (unsigned_type_node);
12104 TYPE_ALIGN (ref) = TYPE_ALIGN (unsigned_type_node);
12105 TREE_UNSIGNED (ref) = 1;
12106 TYPE_PRECISION (ref) = TYPE_PRECISION (unsigned_type_node);
12107 TYPE_MIN_VALUE (ref) = TYPE_MIN_VALUE (unsigned_type_node);
12108 TYPE_MAX_VALUE (ref) = TYPE_MAX_VALUE (unsigned_type_node);
12110 /* Enable us to recognize when a type is created in class context.
12111 To do nested classes correctly, this should probably be cleared
12112 out when we leave this classes scope. Currently this in only
12113 done in `start_enum'. */
12115 pushtag (name, ref, globalize);
12119 struct binding_level *old_b = class_binding_level;
12121 ref = make_lang_type (code);
12122 TYPE_CONTEXT (ref) = context;
12124 #ifdef NONNESTED_CLASSES
12125 /* Class types don't nest the way enums do. */
12126 class_binding_level = (struct binding_level *)0;
12128 pushtag (name, ref, globalize);
12129 class_binding_level = old_b;
12134 /* If it no longer looks like a nested type, make sure it's
12136 If it is not an IDENTIFIER, this is not a declaration */
12137 if (b->namespace_p && !class_binding_level
12138 && TREE_CODE (name) == IDENTIFIER_NODE
12139 && IDENTIFIER_NAMESPACE_VALUE (name) == NULL_TREE)
12140 SET_IDENTIFIER_NAMESPACE_VALUE (name, TYPE_NAME (ref));
12142 if (!globalize && processing_template_decl && IS_AGGR_TYPE (ref))
12143 redeclare_class_template (ref, current_template_parms);
12146 /* Until the type is defined, tentatively accept whatever
12147 structure tag the user hands us. */
12148 if (TYPE_SIZE (ref) == NULL_TREE
12149 && ref != current_class_type
12150 /* Have to check this, in case we have contradictory tag info. */
12151 && IS_AGGR_TYPE_CODE (TREE_CODE (ref)))
12153 if (tag_code == class_type)
12154 CLASSTYPE_DECLARED_CLASS (ref) = 1;
12155 else if (tag_code == record_type)
12156 CLASSTYPE_DECLARED_CLASS (ref) = 0;
12161 TREE_TYPE (ref) = attributes;
12167 xref_tag_from_type (old, id, globalize)
12171 tree code_type_node;
12173 if (TREE_CODE (old) == RECORD_TYPE)
12174 code_type_node = (CLASSTYPE_DECLARED_CLASS (old)
12175 ? class_type_node : record_type_node);
12177 code_type_node = union_type_node;
12179 if (id == NULL_TREE)
12180 id = TYPE_IDENTIFIER (old);
12182 return xref_tag (code_type_node, id, globalize);
12185 /* REF is a type (named NAME), for which we have just seen some
12186 baseclasses. BINFO is a list of those baseclasses; the
12187 TREE_PURPOSE is an access_* node, and the TREE_VALUE is the type of
12188 the base-class. CODE_TYPE_NODE indicates whether REF is a class,
12189 struct, or union. */
12192 xref_basetypes (code_type_node, name, ref, binfo)
12193 tree code_type_node;
12197 /* In the declaration `A : X, Y, ... Z' we mark all the types
12198 (A, X, Y, ..., Z) so we can check for duplicates. */
12203 enum tag_types tag_code = (enum tag_types) TREE_INT_CST_LOW (code_type_node);
12205 if (tag_code == union_type)
12207 cp_error ("derived union `%T' invalid", ref);
12211 len = list_length (binfo);
12212 push_obstacks (TYPE_OBSTACK (ref), TYPE_OBSTACK (ref));
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);
12359 /* Begin compiling the definition of an enumeration type.
12360 NAME is its name (or null if anonymous).
12361 Returns the type object, as yet incomplete.
12362 Also records info about it so that build_enumerator
12363 may be used to declare the individual values as they are read. */
12369 register tree enumtype = NULL_TREE;
12370 struct binding_level *b = current_binding_level;
12372 /* We are wasting space here and putting these on the permanent_obstack so
12373 that typeid(local enum) will work correctly. */
12374 push_obstacks (&permanent_obstack, &permanent_obstack);
12376 /* If this is the real definition for a previous forward reference,
12377 fill in the contents in the same object that used to be the
12378 forward reference. */
12380 if (name != NULL_TREE)
12381 enumtype = lookup_tag (ENUMERAL_TYPE, name, b, 1);
12383 if (enumtype != NULL_TREE && TREE_CODE (enumtype) == ENUMERAL_TYPE)
12385 cp_error ("multiple definition of `%#T'", enumtype);
12386 cp_error_at ("previous definition here", enumtype);
12390 enumtype = make_node (ENUMERAL_TYPE);
12391 pushtag (name, enumtype, 0);
12394 if (current_class_type)
12395 TREE_ADDRESSABLE (b->tags) = 1;
12397 /* We don't copy this value because build_enumerator needs to do it. */
12398 enum_next_value = integer_zero_node;
12401 GNU_xref_decl (current_function_decl, enumtype);
12405 /* After processing and defining all the values of an enumeration type,
12406 install their decls in the enumeration type and finish it off.
12407 ENUMTYPE is the type object and VALUES a list of name-value pairs.
12408 Returns ENUMTYPE. */
12411 finish_enum (enumtype)
12414 register tree minnode = NULL_TREE, maxnode = NULL_TREE;
12415 /* Calculate the maximum value of any enumerator in this type. */
12417 tree values = TYPE_VALUES (enumtype);
12422 for (pair = values; pair; pair = TREE_CHAIN (pair))
12427 /* The TREE_VALUE is a CONST_DECL for this enumeration
12429 decl = TREE_VALUE (pair);
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 ());
12529 /* In start_enum we pushed obstacks. Here, we must pop them. */
12535 /* Build and install a CONST_DECL for an enumeration constant of the
12536 enumeration type TYPE whose NAME and VALUE (if any) are provided.
12537 Assignment of sequential values by default is handled here. */
12540 build_enumerator (name, value, type)
12548 /* Remove no-op casts from the value. */
12550 STRIP_TYPE_NOPS (value);
12552 if (! processing_template_decl)
12554 /* Validate and default VALUE. */
12555 if (value != NULL_TREE)
12557 if (TREE_READONLY_DECL_P (value))
12558 value = decl_constant_value (value);
12560 if (TREE_CODE (value) == INTEGER_CST)
12562 value = default_conversion (value);
12563 constant_expression_warning (value);
12567 cp_error ("enumerator value for `%D' not integer constant", name);
12572 /* Default based on previous value. */
12573 if (value == NULL_TREE && ! processing_template_decl)
12575 value = enum_next_value;
12577 cp_error ("overflow in enumeration values at `%D'", name);
12580 /* Remove no-op casts from the value. */
12582 STRIP_TYPE_NOPS (value);
12584 /* To fix MAX_VAL enum consts. (bkoz) */
12585 TREE_TYPE (value) = integer_type_node;
12589 /* We always have to copy here; not all INTEGER_CSTs are unshared.
12590 Even in other cases, we will later (in finish_enum) be setting the
12592 if (value != NULL_TREE)
12593 value = copy_node (value);
12595 /* C++ associates enums with global, function, or class declarations. */
12597 context = current_scope ();
12598 if (context && context == current_class_type)
12599 /* This enum declaration is local to the class. */
12600 decl = build_lang_decl (CONST_DECL, name, type);
12602 /* It's a global enum, or it's local to a function. (Note local to
12603 a function could mean local to a class method. */
12604 decl = build_decl (CONST_DECL, name, type);
12606 DECL_CONTEXT (decl) = FROB_CONTEXT (context);
12607 DECL_INITIAL (decl) = value;
12608 TREE_READONLY (decl) = 1;
12610 if (context && context == current_class_type)
12611 /* In something like `struct S { enum E { i = 7 }; };' we put `i'
12612 on the TYPE_FIELDS list for `S'. (That's so that you can say
12613 things like `S::i' later.) */
12614 finish_member_declaration (decl);
12618 GNU_xref_decl (current_function_decl, decl);
12621 if (! processing_template_decl)
12623 /* Set basis for default for next value. */
12624 enum_next_value = build_binary_op_nodefault (PLUS_EXPR, value,
12625 integer_one_node, PLUS_EXPR);
12626 enum_overflow = tree_int_cst_lt (enum_next_value, value);
12629 result = tree_cons (name, decl, NULL_TREE);
12634 static int function_depth;
12636 /* We're defining DECL. Make sure that it's type is OK. */
12639 check_function_type (decl)
12642 tree fntype = TREE_TYPE (decl);
12644 /* In a function definition, arg types must be complete. */
12645 require_complete_types_for_parms (current_function_parms);
12647 if (TYPE_SIZE (complete_type (TREE_TYPE (fntype))) == NULL_TREE)
12649 cp_error ("return type `%#T' is incomplete", TREE_TYPE (fntype));
12651 /* Make it return void instead, but don't change the
12652 type of the DECL_RESULT, in case we have a named return value. */
12653 if (TREE_CODE (fntype) == METHOD_TYPE)
12655 tree ctype = TREE_TYPE (TREE_VALUE (TYPE_ARG_TYPES (fntype)));
12657 = build_cplus_method_type (ctype,
12659 FUNCTION_ARG_CHAIN (decl));
12663 = build_function_type (void_type_node,
12664 TYPE_ARG_TYPES (TREE_TYPE (decl)));
12666 = build_exception_variant (fntype,
12667 TYPE_RAISES_EXCEPTIONS (fntype));
12670 abstract_virtuals_error (decl, TREE_TYPE (fntype));
12673 /* Create the FUNCTION_DECL for a function definition.
12674 DECLSPECS and DECLARATOR are the parts of the declaration;
12675 they describe the function's name and the type it returns,
12676 but twisted together in a fashion that parallels the syntax of C.
12678 FLAGS is a bitwise or of SF_PRE_PARSED (indicating that the
12679 DECLARATOR is really the DECL for the function we are about to
12680 process and that DECLSPECS should be ignored), SF_INCLASS_INLINE
12681 indicating that the function is an inline defined in-class, and
12682 SF_EXPAND indicating that we should generate RTL for this
12685 This function creates a binding context for the function body
12686 as well as setting up the FUNCTION_DECL in current_function_decl.
12688 Returns 1 on success. If the DECLARATOR is not suitable for a function
12689 (it defines a datum instead), we return 0, which tells
12690 yyparse to report a parse error.
12692 For C++, we must first check whether that datum makes any sense.
12693 For example, "class A local_a(1,2);" means that variable local_a
12694 is an aggregate of type A, which should have a constructor
12695 applied to it with the argument list [1, 2]. */
12698 start_function (declspecs, declarator, attrs, flags)
12699 tree declspecs, declarator, attrs;
12703 tree ctype = NULL_TREE;
12706 extern int have_extern_spec;
12707 extern int used_extern_spec;
12708 int doing_friend = 0;
12709 struct binding_level *bl;
12711 /* Sanity check. */
12712 my_friendly_assert (TREE_CODE (TREE_VALUE (void_list_node)) == VOID_TYPE, 160);
12713 my_friendly_assert (TREE_CHAIN (void_list_node) == NULL_TREE, 161);
12715 /* This should only be done once on the top most decl. */
12716 if (have_extern_spec && !used_extern_spec)
12718 declspecs = decl_tree_cons (NULL_TREE, get_identifier ("extern"), declspecs);
12719 used_extern_spec = 1;
12722 if (flags & SF_PRE_PARSED)
12724 decl1 = declarator;
12726 fntype = TREE_TYPE (decl1);
12727 if (TREE_CODE (fntype) == METHOD_TYPE)
12728 ctype = TYPE_METHOD_BASETYPE (fntype);
12730 /* ANSI C++ June 5 1992 WP 11.4.5. A friend function defined in a
12731 class is in the (lexical) scope of the class in which it is
12733 if (!ctype && DECL_FRIEND_P (decl1))
12735 ctype = DECL_CLASS_CONTEXT (decl1);
12737 /* CTYPE could be null here if we're dealing with a template;
12738 for example, `inline friend float foo()' inside a template
12739 will have no CTYPE set. */
12740 if (ctype && TREE_CODE (ctype) != RECORD_TYPE)
12746 last_function_parms = DECL_ARGUMENTS (decl1);
12747 last_function_parm_tags = NULL_TREE;
12751 decl1 = grokdeclarator (declarator, declspecs, FUNCDEF, 1, NULL_TREE);
12752 /* If the declarator is not suitable for a function definition,
12753 cause a syntax error. */
12754 if (decl1 == NULL_TREE || TREE_CODE (decl1) != FUNCTION_DECL) return 0;
12756 fntype = TREE_TYPE (decl1);
12758 restype = TREE_TYPE (fntype);
12759 if (CLASS_TYPE_P (restype) && !CLASSTYPE_GOT_SEMICOLON (restype))
12761 cp_error ("semicolon missing after declaration of `%#T'", restype);
12762 shadow_tag (build_expr_list (NULL_TREE, restype));
12763 CLASSTYPE_GOT_SEMICOLON (restype) = 1;
12764 if (TREE_CODE (fntype) == FUNCTION_TYPE)
12765 fntype = build_function_type (integer_type_node,
12766 TYPE_ARG_TYPES (fntype));
12768 fntype = build_cplus_method_type (build_type_variant (TYPE_METHOD_BASETYPE (fntype), TREE_READONLY (decl1), TREE_SIDE_EFFECTS (decl1)),
12770 TYPE_ARG_TYPES (fntype));
12771 TREE_TYPE (decl1) = fntype;
12774 if (TREE_CODE (fntype) == METHOD_TYPE)
12775 ctype = TYPE_METHOD_BASETYPE (fntype);
12776 else if (DECL_MAIN_P (decl1))
12778 /* If this doesn't return integer_type, complain. */
12779 if (TREE_TYPE (TREE_TYPE (decl1)) != integer_type_node)
12781 if (pedantic || warn_return_type)
12782 pedwarn ("return type for `main' changed to `int'");
12783 TREE_TYPE (decl1) = fntype = default_function_type;
12788 /* Sometimes we don't notice that a function is a static member, and
12789 build a METHOD_TYPE for it. Fix that up now. */
12790 if (ctype != NULL_TREE && DECL_STATIC_FUNCTION_P (decl1)
12791 && TREE_CODE (TREE_TYPE (decl1)) == METHOD_TYPE)
12793 revert_static_member_fn (&decl1, NULL, NULL);
12794 last_function_parms = TREE_CHAIN (last_function_parms);
12798 /* Warn if function was previously implicitly declared
12799 (but not if we warned then). */
12800 if (! warn_implicit
12801 && IDENTIFIER_IMPLICIT_DECL (DECL_NAME (decl1)) != NULL_TREE)
12802 cp_warning_at ("`%D' implicitly declared before its definition", IDENTIFIER_IMPLICIT_DECL (DECL_NAME (decl1)));
12804 /* Set up current_class_type, and enter the scope of the class, if
12807 push_nested_class (ctype, 1);
12808 else if (DECL_STATIC_FUNCTION_P (decl1))
12809 push_nested_class (DECL_CONTEXT (decl1), 2);
12811 /* Now that we have entered the scope of the class, we must restore
12812 the bindings for any template parameters surrounding DECL1, if it
12813 is an inline member template. (Order is important; consider the
12814 case where a template parameter has the same name as a field of
12815 the class.) It is not until after this point that
12816 PROCESSING_TEMPLATE_DECL is guaranteed to be set up correctly. */
12817 if (flags & SF_INCLASS_INLINE)
12818 maybe_begin_member_template_processing (decl1);
12820 /* Effective C++ rule 15. See also c_expand_return. */
12822 && DECL_NAME (decl1) == ansi_opname[(int) MODIFY_EXPR]
12823 && TREE_CODE (TREE_TYPE (fntype)) == VOID_TYPE)
12824 cp_warning ("`operator=' should return a reference to `*this'");
12826 /* Make the init_value nonzero so pushdecl knows this is not tentative.
12827 error_mark_node is replaced below (in poplevel) with the BLOCK. */
12828 if (!DECL_INITIAL (decl1))
12829 DECL_INITIAL (decl1) = error_mark_node;
12831 #ifdef SET_DEFAULT_DECL_ATTRIBUTES
12832 SET_DEFAULT_DECL_ATTRIBUTES (decl1, attrs);
12835 /* This function exists in static storage.
12836 (This does not mean `static' in the C sense!) */
12837 TREE_STATIC (decl1) = 1;
12839 /* We must call push_template_decl after current_class_type is set
12840 up. (If we are processing inline definitions after exiting a
12841 class scope, current_class_type will be NULL_TREE until set above
12842 by push_nested_class.) */
12843 if (processing_template_decl)
12844 decl1 = push_template_decl (decl1);
12846 /* We are now in the scope of the function being defined. */
12847 current_function_decl = decl1;
12849 /* Save the parm names or decls from this function's declarator
12850 where store_parm_decls will find them. */
12851 current_function_parms = last_function_parms;
12852 current_function_parm_tags = last_function_parm_tags;
12854 /* Make sure the parameter and return types are reasonable. When
12855 you declare a function, these types can be incomplete, but they
12856 must be complete when you define the function. */
12857 if (! processing_template_decl)
12858 check_function_type (decl1);
12860 /* Build the return declaration for the function. */
12861 restype = TREE_TYPE (fntype);
12862 if (!processing_template_decl)
12864 if (!DECL_RESULT (decl1))
12866 DECL_RESULT (decl1)
12867 = build_decl (RESULT_DECL, 0, TYPE_MAIN_VARIANT (restype));
12868 c_apply_type_quals_to_decl (CP_TYPE_QUALS (restype),
12869 DECL_RESULT (decl1));
12873 /* Just use `void'. Nobody will ever look at this anyhow. */
12874 DECL_RESULT (decl1) = build_decl (RESULT_DECL, 0, void_type_node);
12876 /* Initialize RTL machinery. We cannot do this until
12877 CURRENT_FUNCTION_DECL and DECL_RESULT are set up. We do this
12878 even when processing a template; this is how we get
12879 CURRENT_FUNCTION set up, and our per-function variables
12881 bl = current_binding_level;
12882 init_function_start (decl1, input_filename, lineno);
12883 current_binding_level = bl;
12884 expanding_p = (flags & SF_EXPAND) != 0;
12886 /* Even though we're inside a function body, we still don't want to
12887 call expand_expr to calculate the size of a variable-sized array.
12888 We haven't necessarily assigned RTL to all variables yet, so it's
12889 not safe to try to expand expressions involving them. */
12890 immediate_size_expand = 0;
12891 current_function->x_dont_save_pending_sizes_p = 1;
12893 /* Let the user know we're compiling this function. */
12894 if (processing_template_decl || !building_stmt_tree ())
12895 announce_function (decl1);
12897 /* Record the decl so that the function name is defined.
12898 If we already have a decl for this name, and it is a FUNCTION_DECL,
12899 use the old decl. */
12900 if (!processing_template_decl && !(flags & SF_PRE_PARSED))
12902 /* A specialization is not used to guide overload resolution. */
12903 if ((flag_guiding_decls
12904 || !DECL_TEMPLATE_SPECIALIZATION (decl1))
12905 && ! DECL_FUNCTION_MEMBER_P (decl1))
12906 decl1 = pushdecl (decl1);
12909 /* We need to set the DECL_CONTEXT. */
12910 if (!DECL_CONTEXT (decl1) && DECL_TEMPLATE_INFO (decl1))
12911 DECL_CONTEXT (decl1) = DECL_CONTEXT (DECL_TI_TEMPLATE (decl1));
12912 /* And make sure we have enough default args. */
12913 check_default_args (decl1);
12915 DECL_MAIN_VARIANT (decl1) = decl1;
12916 fntype = TREE_TYPE (decl1);
12919 /* Reset these in case the call to pushdecl changed them. */
12920 current_function_decl = decl1;
12921 current_function->decl = decl1;
12923 /* Initialize the per-function data. */
12924 if (!DECL_PENDING_INLINE_P (decl1) && DECL_SAVED_FUNCTION_DATA (decl1))
12926 /* If we already parsed this function, and we're just expanding it
12927 now, restore saved state. */
12928 struct binding_level *bl = current_binding_level;
12929 *cp_function_chain = *DECL_SAVED_FUNCTION_DATA (decl1);
12930 current_binding_level = bl;
12932 /* This function is being processed in whole-function mode; we
12933 already did semantic analysis. */
12934 current_function->x_whole_function_mode_p = 1;
12936 /* If we decided that we didn't want to inline this function,
12937 make sure the back-end knows that. */
12938 if (!current_function_cannot_inline)
12939 current_function_cannot_inline = cp_function_chain->cannot_inline;
12941 /* We don't need the saved data anymore. */
12942 free (DECL_SAVED_FUNCTION_DATA (decl1));
12943 DECL_SAVED_FUNCTION_DATA (decl1) = NULL;
12945 else if (ctype && !doing_friend && !DECL_STATIC_FUNCTION_P (decl1))
12947 /* We know that this was set up by `grokclassfn'. We do not
12948 wait until `store_parm_decls', since evil parse errors may
12949 never get us to that point. Here we keep the consistency
12950 between `current_class_type' and `current_class_ptr'. */
12951 tree t = DECL_ARGUMENTS (decl1);
12953 my_friendly_assert (t != NULL_TREE && TREE_CODE (t) == PARM_DECL,
12955 my_friendly_assert (TREE_CODE (TREE_TYPE (t)) == POINTER_TYPE,
12958 cp_function_chain->x_current_class_ref
12959 = build_indirect_ref (t, NULL_PTR);
12960 cp_function_chain->x_current_class_ptr = t;
12962 if (DECL_DESTRUCTOR_P (decl1))
12963 current_in_charge_parm = TREE_CHAIN (t);
12966 if (DECL_INTERFACE_KNOWN (decl1))
12968 tree ctx = hack_decl_function_context (decl1);
12970 if (DECL_NOT_REALLY_EXTERN (decl1))
12971 DECL_EXTERNAL (decl1) = 0;
12973 if (ctx != NULL_TREE && DECL_THIS_INLINE (ctx)
12974 && TREE_PUBLIC (ctx))
12975 /* This is a function in a local class in an extern inline
12977 comdat_linkage (decl1);
12979 /* If this function belongs to an interface, it is public.
12980 If it belongs to someone else's interface, it is also external.
12981 This only affects inlines and template instantiations. */
12982 else if (interface_unknown == 0
12983 && (! DECL_TEMPLATE_INSTANTIATION (decl1)
12984 || flag_alt_external_templates))
12986 if (DECL_THIS_INLINE (decl1) || DECL_TEMPLATE_INSTANTIATION (decl1)
12987 || processing_template_decl)
12989 DECL_EXTERNAL (decl1)
12991 || (DECL_THIS_INLINE (decl1) && ! flag_implement_inlines
12992 && !DECL_VINDEX (decl1)));
12994 /* For WIN32 we also want to put these in linkonce sections. */
12995 maybe_make_one_only (decl1);
12998 DECL_EXTERNAL (decl1) = 0;
12999 DECL_NOT_REALLY_EXTERN (decl1) = 0;
13000 DECL_INTERFACE_KNOWN (decl1) = 1;
13002 else if (interface_unknown && interface_only
13003 && (! DECL_TEMPLATE_INSTANTIATION (decl1)
13004 || flag_alt_external_templates))
13006 /* If MULTIPLE_SYMBOL_SPACES is defined and we saw a #pragma
13007 interface, we will have interface_only set but not
13008 interface_known. In that case, we don't want to use the normal
13009 heuristics because someone will supply a #pragma implementation
13010 elsewhere, and deducing it here would produce a conflict. */
13011 comdat_linkage (decl1);
13012 DECL_EXTERNAL (decl1) = 0;
13013 DECL_INTERFACE_KNOWN (decl1) = 1;
13014 DECL_DEFER_OUTPUT (decl1) = 1;
13018 /* This is a definition, not a reference.
13019 So clear DECL_EXTERNAL. */
13020 DECL_EXTERNAL (decl1) = 0;
13022 if ((DECL_THIS_INLINE (decl1) || DECL_TEMPLATE_INSTANTIATION (decl1))
13023 && ! DECL_INTERFACE_KNOWN (decl1)
13024 /* Don't try to defer nested functions for now. */
13025 && ! hack_decl_function_context (decl1))
13026 DECL_DEFER_OUTPUT (decl1) = 1;
13028 DECL_INTERFACE_KNOWN (decl1) = 1;
13031 if (doing_semantic_analysis_p ())
13034 current_binding_level->parm_flag = 1;
13038 cplus_decl_attributes (decl1, NULL_TREE, attrs);
13040 if (!building_stmt_tree ())
13042 GNU_xref_function (decl1, current_function_parms);
13043 make_function_rtl (decl1);
13046 /* Promote the value to int before returning it. */
13047 if (C_PROMOTING_INTEGER_TYPE_P (restype))
13048 restype = type_promotes_to (restype);
13050 /* If this fcn was already referenced via a block-scope `extern' decl
13051 (or an implicit decl), propagate certain information about the usage. */
13052 if (TREE_ADDRESSABLE (DECL_ASSEMBLER_NAME (decl1)))
13053 TREE_ADDRESSABLE (decl1) = 1;
13055 if (DECL_RESULT (decl1) == NULL_TREE)
13057 DECL_RESULT (decl1)
13058 = build_decl (RESULT_DECL, 0, TYPE_MAIN_VARIANT (restype));
13059 TREE_READONLY (DECL_RESULT (decl1)) = CP_TYPE_CONST_P (restype);
13060 TREE_THIS_VOLATILE (DECL_RESULT (decl1)) = CP_TYPE_VOLATILE_P (restype);
13063 /* Allocate further tree nodes temporarily during compilation
13064 of this function only. Tiemann moved up here from bottom of fn. */
13065 /* If this is a nested function, then we must continue to allocate RTL
13066 on the permanent obstack in case we need to inline it later. */
13067 if (! hack_decl_function_context (decl1))
13068 temporary_allocation ();
13070 /* Make sure that we always have a momntary obstack while we're in a
13074 if (building_stmt_tree ())
13075 begin_stmt_tree (decl1);
13079 if (DESTRUCTOR_NAME_P (DECL_ASSEMBLER_NAME (decl1))
13080 && DECL_LANGUAGE (decl1) == lang_cplusplus)
13081 dtor_label = build_decl (LABEL_DECL, NULL_TREE, NULL_TREE);
13082 else if (DECL_CONSTRUCTOR_P (decl1))
13083 ctor_label = build_decl (LABEL_DECL, NULL_TREE, NULL_TREE);
13088 /* Called after store_parm_decls for a function-try-block. We need to update
13089 last_parm_cleanup_insn so that the base initializers for a constructor
13090 are run within this block, not before it. */
13093 expand_start_early_try_stmts ()
13095 expand_start_try_stmts ();
13096 last_parm_cleanup_insn = get_last_insn ();
13099 /* Store the parameter declarations into the current function declaration.
13100 This is called after parsing the parameter declarations, before
13101 digesting the body of the function.
13103 Also install to binding contour return value identifier, if any. */
13106 store_parm_decls ()
13108 register tree fndecl = current_function_decl;
13109 register tree parm;
13110 int parms_have_cleanups = 0;
13111 tree cleanups = NULL_TREE;
13113 /* This is a list of types declared among parms in a prototype. */
13114 tree parmtags = current_function_parm_tags;
13116 /* This is a chain of any other decls that came in among the parm
13117 declarations. If a parm is declared with enum {foo, bar} x;
13118 then CONST_DECLs for foo and bar are put here. */
13119 tree nonparms = NULL_TREE;
13121 /* Create a binding level for the parms. */
13122 if (!building_stmt_tree ())
13123 expand_start_bindings (2);
13125 if (current_function_parms)
13127 /* This case is when the function was defined with an ANSI prototype.
13128 The parms already have decls, so we need not do anything here
13129 except record them as in effect
13130 and complain if any redundant old-style parm decls were written. */
13132 tree specparms = current_function_parms;
13135 if (doing_semantic_analysis_p ())
13137 /* Must clear this because it might contain TYPE_DECLs declared
13139 storedecls (NULL_TREE);
13141 /* If we're doing semantic analysis, then we'll call pushdecl
13142 for each of these. We must do them in reverse order so that
13143 they end in the correct forward order. */
13144 specparms = nreverse (specparms);
13147 for (parm = specparms; parm; parm = next)
13149 next = TREE_CHAIN (parm);
13150 if (TREE_CODE (parm) == PARM_DECL)
13154 if (doing_semantic_analysis_p ())
13156 if (DECL_NAME (parm) == NULL_TREE
13157 || TREE_CODE (TREE_TYPE (parm)) != VOID_TYPE)
13160 cp_error ("parameter `%D' declared void", parm);
13163 if (! building_stmt_tree ()
13164 && (cleanup = maybe_build_cleanup (parm), cleanup))
13166 expand_decl (parm);
13167 parms_have_cleanups = 1;
13169 /* Keep track of the cleanups. */
13170 cleanups = tree_cons (parm, cleanup, cleanups);
13175 /* If we find an enum constant or a type tag,
13176 put it aside for the moment. */
13177 TREE_CHAIN (parm) = NULL_TREE;
13178 nonparms = chainon (nonparms, parm);
13182 if (doing_semantic_analysis_p ())
13184 /* Get the decls in their original chain order
13185 and record in the function. This is all and only the
13186 PARM_DECLs that were pushed into scope by the loop above. */
13187 DECL_ARGUMENTS (fndecl) = getdecls ();
13188 storetags (chainon (parmtags, gettags ()));
13190 /* We built up the cleanups in reversed order. */
13191 cleanups = nreverse (cleanups);
13195 DECL_ARGUMENTS (fndecl) = NULL_TREE;
13197 /* Now store the final chain of decls for the arguments
13198 as the decl-chain of the current lexical scope.
13199 Put the enumerators in as well, at the front so that
13200 DECL_ARGUMENTS is not modified. */
13201 if (doing_semantic_analysis_p ())
13202 storedecls (chainon (nonparms, DECL_ARGUMENTS (fndecl)));
13204 /* Initialize the RTL code for the function. */
13205 DECL_SAVED_INSNS (fndecl) = 0;
13206 if (! building_stmt_tree ())
13207 expand_function_start (fndecl, parms_have_cleanups);
13209 current_function_parms_stored = 1;
13211 /* If this function is `main', emit a call to `__main'
13212 to run global initializers, etc. */
13213 if (DECL_MAIN_P (fndecl) && !building_stmt_tree ())
13214 expand_main_function ();
13216 /* Now that we have initialized the parms, we can start their
13217 cleanups. We cannot do this before, since expand_decl_cleanup
13218 should not be called before the parm can be used. */
13219 if (cleanups && !building_stmt_tree ())
13222 if (! expand_decl_cleanup (TREE_PURPOSE (cleanups),
13223 TREE_VALUE (cleanups)))
13224 cp_error ("parser lost in parsing declaration of `%D'",
13225 TREE_PURPOSE (cleanups));
13227 cleanups = TREE_CHAIN (cleanups);
13230 /* Create a binding contour which can be used to catch
13231 cleanup-generated temporaries. Also, if the return value needs or
13232 has initialization, deal with that now. */
13233 if (parms_have_cleanups)
13236 if (!building_stmt_tree ())
13237 expand_start_bindings (2);
13240 /* Do the starting of the exception specifications, if we have any. */
13241 if (flag_exceptions && !processing_template_decl
13242 && building_stmt_tree ()
13243 && TYPE_RAISES_EXCEPTIONS (TREE_TYPE (current_function_decl)))
13244 current_eh_spec_try_block = expand_start_eh_spec ();
13246 last_parm_cleanup_insn = get_last_insn ();
13247 last_dtor_insn = get_last_insn ();
13250 /* Bind a name and initialization to the return value of
13251 the current function. */
13254 store_return_init (decl)
13257 /* If this named return value comes in a register, put it in a
13258 pseudo-register. */
13259 if (DECL_REGISTER (decl))
13261 original_result_rtx = DECL_RTL (decl);
13262 DECL_RTL (decl) = gen_reg_rtx (DECL_MODE (decl));
13267 /* We have finished doing semantic analysis on DECL, but have not yet
13268 generated RTL for its body. Save away our current state, so that
13269 when we want to generate RTL later we know what to do. */
13272 save_function_data (decl)
13275 struct language_function *f;
13277 /* Save the language-specific per-function data so that we can
13278 get it back when we really expand this function. */
13279 my_friendly_assert (!DECL_PENDING_INLINE_P (decl),
13283 f = ((struct language_function *)
13284 xmalloc (sizeof (struct language_function)));
13285 bcopy ((char *) cp_function_chain, (char *) f,
13286 sizeof (struct language_function));
13287 DECL_SAVED_FUNCTION_DATA (decl) = f;
13289 /* Clear out the bits we don't need. */
13290 f->x_base_init_list = NULL_TREE;
13291 f->x_member_init_list = NULL_TREE;
13292 f->x_last_tree = NULL_TREE;
13293 f->x_last_expr_type = NULL_TREE;
13294 f->x_last_dtor_insn = NULL_RTX;
13295 f->x_last_parm_cleanup_insn = NULL_RTX;
13296 f->x_result_rtx = NULL_RTX;
13297 f->x_named_label_uses = NULL;
13298 f->bindings = NULL;
13300 /* When we get back here again, we will be expanding. */
13301 f->x_expanding_p = 1;
13303 /* If we've already decided that we cannot inline this function, we
13304 must remember that fact when we actually go to expand the
13306 f->cannot_inline = current_function_cannot_inline;
13309 /* At the end of every constructor we generate to code to return
13310 `this'. Do that now. */
13313 finish_constructor_body ()
13315 /* Any return from a constructor will end up here. */
13316 add_tree (build_min_nt (LABEL_STMT, ctor_label));
13318 /* Clear CTOR_LABEL so that finish_return_stmt knows to really
13319 generate the return, rather than a goto to CTOR_LABEL. */
13320 ctor_label = NULL_TREE;
13321 /* In check_return_expr we translate an empty return from a
13322 constructor to a return of `this'. */
13323 finish_return_stmt (NULL_TREE);
13326 /* At the end of every destructor we generate code to restore virtual
13327 function tables to the values desired by base classes and to call
13328 to base class destructors. Do that now. */
13331 finish_destructor_body ()
13333 tree compound_stmt;
13338 /* Create a block to contain all the extra code. */
13339 compound_stmt = begin_compound_stmt (/*has_no_scope=*/0);
13341 /* Any return from a destructor will end up here. */
13342 add_tree (build_min_nt (LABEL_STMT, dtor_label));
13344 /* Generate the code to call destructor on base class. If this
13345 destructor belongs to a class with virtual functions, then set
13346 the virtual function table pointer to represent the type of our
13349 /* This side-effect makes call to `build_delete' generate the code
13350 we have to have at the end of this destructor. `build_delete'
13351 will set the flag again. */
13352 TYPE_HAS_DESTRUCTOR (current_class_type) = 0;
13354 /* These are two cases where we cannot delegate deletion. */
13355 if (TYPE_USES_VIRTUAL_BASECLASSES (current_class_type)
13356 || TYPE_GETS_REG_DELETE (current_class_type))
13357 in_charge = integer_zero_node;
13359 in_charge = current_in_charge_parm;
13361 exprstmt = build_delete (current_class_type,
13364 LOOKUP_NONVIRTUAL|LOOKUP_DESTRUCTOR|LOOKUP_NORMAL,
13367 if (exprstmt != error_mark_node
13368 && (TREE_CODE (exprstmt) != NOP_EXPR
13369 || TREE_OPERAND (exprstmt, 0) != integer_zero_node
13370 || TYPE_USES_VIRTUAL_BASECLASSES (current_class_type)))
13372 if (exprstmt != void_zero_node)
13373 /* Don't call `expand_expr_stmt' if we're not going to do
13374 anything, since -Wall will give a diagnostic. */
13375 finish_expr_stmt (exprstmt);
13377 /* Run destructors for all virtual baseclasses. */
13378 if (TYPE_USES_VIRTUAL_BASECLASSES (current_class_type))
13380 tree vbases = nreverse (copy_list (CLASSTYPE_VBASECLASSES (current_class_type)));
13381 tree if_stmt = begin_if_stmt ();
13382 finish_if_stmt_cond (build (BIT_AND_EXPR, integer_type_node,
13383 current_in_charge_parm,
13389 if (TYPE_NEEDS_DESTRUCTOR (BINFO_TYPE (vbases)))
13391 tree vb = get_vbase
13392 (BINFO_TYPE (vbases),
13393 TYPE_BINFO (current_class_type));
13395 (build_scoped_method_call
13396 (current_class_ref, vb, dtor_identifier,
13397 build_expr_list (NULL_TREE, integer_zero_node)));
13399 vbases = TREE_CHAIN (vbases);
13402 finish_then_clause (if_stmt);
13407 virtual_size = c_sizeof (current_class_type);
13409 /* At the end, call delete if that's what's requested. */
13411 /* FDIS sez: At the point of definition of a virtual destructor
13412 (including an implicit definition), non-placement operator delete
13413 shall be looked up in the scope of the destructor's class and if
13414 found shall be accessible and unambiguous.
13416 This is somewhat unclear, but I take it to mean that if the class
13417 only defines placement deletes we don't do anything here. So we
13418 pass LOOKUP_SPECULATIVELY; delete_sanity will complain for us if
13419 they ever try to delete one of these. */
13420 if (TYPE_GETS_REG_DELETE (current_class_type)
13421 || TYPE_USES_VIRTUAL_BASECLASSES (current_class_type))
13425 exprstmt = build_op_delete_call
13426 (DELETE_EXPR, current_class_ptr, virtual_size,
13427 LOOKUP_NORMAL | LOOKUP_SPECULATIVELY, NULL_TREE);
13429 if_stmt = begin_if_stmt ();
13430 finish_if_stmt_cond (build (BIT_AND_EXPR, integer_type_node,
13431 current_in_charge_parm,
13434 finish_expr_stmt (exprstmt);
13435 finish_then_clause (if_stmt);
13439 /* Close the block we started above. */
13440 finish_compound_stmt (/*has_no_scope=*/0, compound_stmt);
13443 /* Finish up a function declaration and compile that function
13444 all the way to assembler language output. The free the storage
13445 for the function definition.
13447 This is called after parsing the body of the function definition.
13448 LINENO is the current line number.
13450 FLAGS is a bitwise or of the following values:
13452 An extra call to poplevel (and expand_end_bindings) must be
13453 made to take care of the binding contour for the base
13454 initializers. This is only relevant for constructors.
13456 We just finished processing the body of an in-class inline
13457 function definition. (This processing will have taken place
13458 after the class definition is complete.) */
13461 finish_function (lineno, flags)
13465 register tree fndecl = current_function_decl;
13466 tree fntype, ctype = NULL_TREE;
13467 /* Label to use if this function is supposed to return a value. */
13468 tree no_return_label = NULL_TREE;
13469 int call_poplevel = (flags & 1) != 0;
13470 int inclass_inline = (flags & 2) != 0;
13474 /* When we get some parse errors, we can end up without a
13475 current_function_decl, so cope. */
13476 if (fndecl == NULL_TREE)
13477 return error_mark_node;
13479 nested = function_depth > 1;
13480 fntype = TREE_TYPE (fndecl);
13482 /* TREE_READONLY (fndecl) = 1;
13483 This caused &foo to be of type ptr-to-const-function
13484 which then got a warning when stored in a ptr-to-function variable. */
13486 /* This happens on strange parse errors. */
13487 if (! current_function_parms_stored)
13490 store_parm_decls ();
13493 if (building_stmt_tree ())
13495 if (DECL_CONSTRUCTOR_P (fndecl))
13497 finish_constructor_body ();
13501 else if (DECL_DESTRUCTOR_P (fndecl) && !processing_template_decl)
13502 finish_destructor_body ();
13503 else if (DECL_MAIN_P (fndecl))
13505 /* Make it so that `main' always returns 0 by default. */
13507 finish_return_stmt (integer_one_node);
13509 finish_return_stmt (integer_zero_node);
13513 /* Finish dealing with exception specifiers. */
13514 if (flag_exceptions && !processing_template_decl
13515 && TYPE_RAISES_EXCEPTIONS (TREE_TYPE (current_function_decl)))
13516 expand_end_eh_spec (TYPE_RAISES_EXCEPTIONS
13517 (TREE_TYPE (current_function_decl)),
13518 current_eh_spec_try_block);
13522 if (write_symbols != NO_DEBUG /*&& TREE_CODE (fntype) != METHOD_TYPE*/)
13524 tree ttype = target_type (fntype);
13527 if (IS_AGGR_TYPE (ttype))
13528 /* Let debugger know it should output info for this type. */
13529 note_debug_info_needed (ttype);
13531 for (parmdecl = DECL_ARGUMENTS (fndecl); parmdecl; parmdecl = TREE_CHAIN (parmdecl))
13533 ttype = target_type (TREE_TYPE (parmdecl));
13534 if (IS_AGGR_TYPE (ttype))
13535 /* Let debugger know it should output info for this type. */
13536 note_debug_info_needed (ttype);
13540 /* Clean house because we will need to reorder insns here. */
13541 do_pending_stack_adjust ();
13545 else if (DECL_CONSTRUCTOR_P (fndecl))
13547 /* All subobjects have been fully constructed at this point. */
13548 end_protect_partials ();
13553 else if (return_label != NULL_RTX
13554 && flag_this_is_variable <= 0
13555 && current_function_return_value == NULL_TREE
13556 && ! DECL_NAME (DECL_RESULT (current_function_decl)))
13557 no_return_label = build_decl (LABEL_DECL, NULL_TREE, NULL_TREE);
13559 if (flag_exceptions)
13560 expand_exception_blocks ();
13562 /* If this function is supposed to return a value, ensure that
13563 we do not fall into the cleanups by mistake. The end of our
13564 function will look like this:
13566 user code (may have return stmt somewhere)
13567 goto no_return_label
13572 NOTE_INSN_FUNCTION_END
13576 If the user omits a return stmt in the USER CODE section, we
13577 will have a control path which reaches NOTE_INSN_FUNCTION_END.
13578 Otherwise, we won't. */
13579 if (no_return_label)
13581 DECL_CONTEXT (no_return_label) = fndecl;
13582 DECL_INITIAL (no_return_label) = error_mark_node;
13583 DECL_SOURCE_FILE (no_return_label) = input_filename;
13584 DECL_SOURCE_LINE (no_return_label) = lineno;
13585 expand_goto (no_return_label);
13590 /* Remove the binding contour which is used
13591 to catch cleanup-generated temporaries. */
13592 expand_end_bindings (0, 0, 0);
13593 poplevel (0, 0, 0);
13595 /* Emit label at beginning of cleanup code for parameters. */
13596 emit_label (cleanup_label);
13599 /* Get return value into register if that's where it's supposed
13601 if (original_result_rtx)
13602 fixup_result_decl (DECL_RESULT (fndecl), original_result_rtx);
13604 /* Finish building code that will trigger warnings if users forget
13605 to make their functions return values. */
13606 if (no_return_label || cleanup_label)
13607 emit_jump (return_label);
13608 if (no_return_label)
13610 /* We don't need to call `expand_*_return' here because we
13611 don't need any cleanups here--this path of code is only
13612 for error checking purposes. */
13613 expand_label (no_return_label);
13616 /* We hard-wired immediate_size_expand to zero in
13617 start_function. Expand_function_end will decrement this
13618 variable. So, we set the variable to one here, so that after
13619 the decrement it will remain zero. */
13620 immediate_size_expand = 1;
13622 /* Generate rtl for function exit. */
13623 expand_function_end (input_filename, lineno, 1);
13626 /* We have to save this value here in case
13627 maybe_end_member_template_processing decides to pop all the
13628 template parameters. */
13629 expand_p = !building_stmt_tree ();
13631 /* If we're saving up tree structure, tie off the function now. */
13633 finish_stmt_tree (fndecl);
13635 /* This must come after expand_function_end because cleanups might
13636 have declarations (from inline functions) that need to go into
13637 this function's blocks. */
13638 if (doing_semantic_analysis_p ())
13640 if (current_binding_level->parm_flag != 1)
13641 my_friendly_abort (122);
13642 poplevel (1, 0, 1);
13645 /* Remember that we were in class scope. */
13646 if (current_class_name)
13647 ctype = current_class_type;
13649 /* Must mark the RESULT_DECL as being in this function. */
13650 DECL_CONTEXT (DECL_RESULT (fndecl)) = fndecl;
13652 /* Set the BLOCK_SUPERCONTEXT of the outermost function scope to point
13653 to the FUNCTION_DECL node itself. */
13654 BLOCK_SUPERCONTEXT (DECL_INITIAL (fndecl)) = fndecl;
13656 /* Undo the call to push_momentary in start_function. */
13659 /* Save away current state, if appropriate. */
13660 if (!expanding_p && !processing_template_decl)
13661 save_function_data (fndecl);
13667 int saved_flag_keep_inline_functions =
13668 flag_keep_inline_functions;
13670 /* So we can tell if jump_optimize sets it to 1. */
13673 if (DECL_CONTEXT (fndecl) != NULL_TREE
13674 && hack_decl_function_context (fndecl))
13675 /* Trick rest_of_compilation into not deferring output of this
13676 function, even if it is inline, since the rtl_obstack for
13677 this function is the function_obstack of the enclosing
13678 function and will be deallocated when the enclosing
13679 function is gone. See save_tree_status. */
13680 flag_keep_inline_functions = 1;
13682 /* Before we call rest_of_compilation (which will pop the
13683 CURRENT_FUNCTION), we must save these values. */
13684 returns_null = current_function_returns_null;
13685 returns_value = current_function_returns_value;
13687 /* If this is a nested function (like a template instantiation
13688 that we're compiling in the midst of compiling something
13689 else), push a new GC context. That will keep local variables
13690 on the stack from being collected while we're doing the
13691 compilation of this function. */
13692 if (function_depth > 1)
13693 ggc_push_context ();
13695 /* Run the optimizers and output the assembler code for this
13697 if (DECL_ARTIFICIAL (fndecl))
13699 /* Do we really *want* to inline this synthesized method? */
13701 int save_fif = flag_inline_functions;
13702 flag_inline_functions = 1;
13704 /* Turn off DECL_INLINE for the moment so function_cannot_inline_p
13705 will check our size. */
13706 DECL_INLINE (fndecl) = 0;
13708 rest_of_compilation (fndecl);
13709 flag_inline_functions = save_fif;
13712 rest_of_compilation (fndecl);
13714 /* Undo the call to ggc_push_context above. */
13715 if (function_depth > 1)
13716 ggc_pop_context ();
13718 flag_keep_inline_functions = saved_flag_keep_inline_functions;
13720 if (DECL_SAVED_INSNS (fndecl) && ! TREE_ASM_WRITTEN (fndecl))
13722 /* Set DECL_EXTERNAL so that assemble_external will be called as
13723 necessary. We'll clear it again in finish_file. */
13724 if (! DECL_EXTERNAL (fndecl))
13725 DECL_NOT_REALLY_EXTERN (fndecl) = 1;
13726 DECL_EXTERNAL (fndecl) = 1;
13727 mark_inline_for_output (fndecl);
13730 if (ctype && TREE_ASM_WRITTEN (fndecl))
13731 note_debug_info_needed (ctype);
13733 returns_null |= can_reach_end;
13735 /* Since we don't normally go through c_expand_return for constructors,
13736 this normally gets the wrong value.
13737 Also, named return values have their return codes emitted after
13738 NOTE_INSN_FUNCTION_END, confusing jump.c. */
13739 if (DECL_CONSTRUCTOR_P (fndecl)
13740 || DECL_NAME (DECL_RESULT (fndecl)) != NULL_TREE)
13743 if (TREE_THIS_VOLATILE (fndecl) && returns_null)
13744 cp_warning ("`noreturn' function `%D' does return", fndecl);
13745 else if ((warn_return_type || pedantic)
13747 && TREE_CODE (TREE_TYPE (fntype)) != VOID_TYPE)
13749 /* If this function returns non-void and control can drop through,
13751 cp_warning ("control reaches end of non-void function `%D'", fndecl);
13753 /* With just -W, complain only if function returns both with
13754 and without a value. */
13755 else if (extra_warnings && returns_value && returns_null)
13756 warning ("this function may return with or without a value");
13760 /* Since we never call rest_of_compilation, we never clear
13761 CURRENT_FUNCTION. Do so explicitly. */
13762 free_after_compilation (current_function);
13763 current_function = NULL;
13766 /* If this is a in-class inline definition, we may have to pop the
13767 bindings for the template parameters that we added in
13768 maybe_begin_member_template_processing when start_function was
13770 if (inclass_inline)
13771 maybe_end_member_template_processing ();
13773 /* Leave the scope of the class. */
13775 pop_nested_class ();
13779 /* Free all the tree nodes making up this function. */
13780 /* Switch back to allocating nodes permanently
13781 until we start another function. */
13783 permanent_allocation (1);
13785 if (!DECL_SAVED_INSNS (fndecl) && !DECL_SAVED_FUNCTION_DATA (fndecl))
13789 /* Stop pointing to the local nodes about to be freed. */
13790 /* But DECL_INITIAL must remain nonzero so we know this
13791 was an actual function definition. */
13792 DECL_INITIAL (fndecl) = error_mark_node;
13793 for (t = DECL_ARGUMENTS (fndecl); t; t = TREE_CHAIN (t))
13794 DECL_RTL (t) = DECL_INCOMING_RTL (t) = NULL_RTX;
13797 if (DECL_STATIC_CONSTRUCTOR (fndecl))
13798 static_ctors = tree_cons (NULL_TREE, fndecl, static_ctors);
13799 if (DECL_STATIC_DESTRUCTOR (fndecl))
13800 static_dtors = tree_cons (NULL_TREE, fndecl, static_dtors);
13805 /* Let the error reporting routines know that we're outside a
13806 function. For a nested function, this value is used in
13807 pop_cp_function_context and then reset via pop_function_context. */
13808 current_function_decl = NULL_TREE;
13814 /* Create the FUNCTION_DECL for a function definition.
13815 DECLSPECS and DECLARATOR are the parts of the declaration;
13816 they describe the return type and the name of the function,
13817 but twisted together in a fashion that parallels the syntax of C.
13819 This function creates a binding context for the function body
13820 as well as setting up the FUNCTION_DECL in current_function_decl.
13822 Returns a FUNCTION_DECL on success.
13824 If the DECLARATOR is not suitable for a function (it defines a datum
13825 instead), we return 0, which tells yyparse to report a parse error.
13827 May return void_type_node indicating that this method is actually
13828 a friend. See grokfield for more details.
13830 Came here with a `.pushlevel' .
13832 DO NOT MAKE ANY CHANGES TO THIS CODE WITHOUT MAKING CORRESPONDING
13833 CHANGES TO CODE IN `grokfield'. */
13836 start_method (declspecs, declarator, attrlist)
13837 tree declarator, declspecs, attrlist;
13839 tree fndecl = grokdeclarator (declarator, declspecs, MEMFUNCDEF, 0,
13842 /* Something too ugly to handle. */
13843 if (fndecl == NULL_TREE)
13846 /* Pass friends other than inline friend functions back. */
13847 if (fndecl == void_type_node)
13850 if (TREE_CODE (fndecl) != FUNCTION_DECL)
13851 /* Not a function, tell parser to report parse error. */
13854 if (DECL_IN_AGGR_P (fndecl))
13856 if (IDENTIFIER_ERROR_LOCUS (DECL_ASSEMBLER_NAME (fndecl)) != current_class_type)
13858 if (DECL_CONTEXT (fndecl)
13859 && TREE_CODE( DECL_CONTEXT (fndecl)) != NAMESPACE_DECL)
13860 cp_error ("`%D' is already defined in class %s", fndecl,
13861 TYPE_NAME_STRING (DECL_CONTEXT (fndecl)));
13863 return void_type_node;
13866 check_template_shadow (fndecl);
13868 DECL_THIS_INLINE (fndecl) = 1;
13870 if (flag_default_inline)
13871 DECL_INLINE (fndecl) = 1;
13873 /* We process method specializations in finish_struct_1. */
13874 if (processing_template_decl && !DECL_TEMPLATE_SPECIALIZATION (fndecl))
13875 fndecl = push_template_decl (fndecl);
13877 /* We read in the parameters on the maybepermanent_obstack,
13878 but we won't be getting back to them until after we
13879 may have clobbered them. So the call to preserve_data
13880 will keep them safe. */
13883 if (! DECL_FRIEND_P (fndecl))
13885 if (TREE_CHAIN (fndecl))
13887 fndecl = copy_node (fndecl);
13888 TREE_CHAIN (fndecl) = NULL_TREE;
13891 if (DECL_CONSTRUCTOR_P (fndecl))
13893 if (! grok_ctor_properties (current_class_type, fndecl))
13894 return void_type_node;
13896 else if (IDENTIFIER_OPNAME_P (DECL_NAME (fndecl)))
13897 grok_op_properties (fndecl, DECL_VIRTUAL_P (fndecl), 0);
13900 cp_finish_decl (fndecl, NULL_TREE, NULL_TREE, 0, 0);
13902 /* Make a place for the parms */
13904 current_binding_level->parm_flag = 1;
13906 DECL_IN_AGGR_P (fndecl) = 1;
13910 /* Go through the motions of finishing a function definition.
13911 We don't compile this method until after the whole class has
13914 FINISH_METHOD must return something that looks as though it
13915 came from GROKFIELD (since we are defining a method, after all).
13917 This is called after parsing the body of the function definition.
13918 STMTS is the chain of statements that makes up the function body.
13920 DECL is the ..._DECL that `start_method' provided. */
13923 finish_method (decl)
13926 register tree fndecl = decl;
13929 register tree link;
13931 if (decl == void_type_node)
13934 old_initial = DECL_INITIAL (fndecl);
13936 /* Undo the level for the parms (from start_method).
13937 This is like poplevel, but it causes nothing to be
13938 saved. Saving information here confuses symbol-table
13939 output routines. Besides, this information will
13940 be correctly output when this method is actually
13943 /* Clear out the meanings of the local variables of this level;
13944 also record in each decl which block it belongs to. */
13946 for (link = current_binding_level->names; link; link = TREE_CHAIN (link))
13948 if (DECL_NAME (link) != NULL_TREE)
13949 pop_binding (DECL_NAME (link), link);
13950 my_friendly_assert (TREE_CODE (link) != FUNCTION_DECL, 163);
13951 DECL_CONTEXT (link) = NULL_TREE;
13954 GNU_xref_end_scope ((HOST_WIDE_INT) current_binding_level,
13955 (HOST_WIDE_INT) current_binding_level->level_chain,
13956 current_binding_level->parm_flag,
13957 current_binding_level->keep);
13959 poplevel (0, 0, 0);
13961 DECL_INITIAL (fndecl) = old_initial;
13963 /* We used to check if the context of FNDECL was different from
13964 current_class_type as another way to get inside here. This didn't work
13965 for String.cc in libg++. */
13966 if (DECL_FRIEND_P (fndecl))
13968 CLASSTYPE_INLINE_FRIENDS (current_class_type)
13969 = tree_cons (NULL_TREE, fndecl, CLASSTYPE_INLINE_FRIENDS (current_class_type));
13970 decl = void_type_node;
13976 /* Called when a new struct TYPE is defined.
13977 If this structure or union completes the type of any previous
13978 variable declaration, lay it out and output its rtl. */
13981 hack_incomplete_structures (type)
13986 if (current_binding_level->incomplete == NULL_TREE)
13989 if (!type) /* Don't do this for class templates. */
13992 for (list = ¤t_binding_level->incomplete; *list; )
13994 tree decl = TREE_VALUE (*list);
13995 if ((decl && TREE_TYPE (decl) == type)
13996 || (TREE_TYPE (decl)
13997 && TREE_CODE (TREE_TYPE (decl)) == ARRAY_TYPE
13998 && TREE_TYPE (TREE_TYPE (decl)) == type))
14000 int toplevel = toplevel_bindings_p ();
14001 if (TREE_CODE (TREE_TYPE (decl)) == ARRAY_TYPE
14002 && TREE_TYPE (TREE_TYPE (decl)) == type)
14003 layout_type (TREE_TYPE (decl));
14004 layout_decl (decl, 0);
14005 rest_of_decl_compilation (decl, NULL_PTR, toplevel, 0);
14009 expand_decl (decl);
14010 cleanup = maybe_build_cleanup (decl);
14011 expand_decl_init (decl);
14012 if (! expand_decl_cleanup (decl, cleanup))
14013 cp_error ("parser lost in parsing declaration of `%D'",
14016 *list = TREE_CHAIN (*list);
14019 list = &TREE_CHAIN (*list);
14023 /* If DECL is of a type which needs a cleanup, build that cleanup here.
14024 See build_delete for information about AUTO_DELETE.
14026 Don't build these on the momentary obstack; they must live
14027 the life of the binding contour. */
14030 maybe_build_cleanup_1 (decl, auto_delete)
14031 tree decl, auto_delete;
14033 tree type = TREE_TYPE (decl);
14034 if (type != error_mark_node && TYPE_NEEDS_DESTRUCTOR (type))
14036 int temp = 0, flags = LOOKUP_NORMAL|LOOKUP_DESTRUCTOR;
14039 if (TREE_CODE (decl) != PARM_DECL)
14040 temp = suspend_momentary ();
14042 if (TREE_CODE (type) == ARRAY_TYPE)
14046 mark_addressable (decl);
14047 rval = build_unary_op (ADDR_EXPR, decl, 0);
14050 /* Optimize for space over speed here. */
14051 if (! TYPE_USES_VIRTUAL_BASECLASSES (type)
14052 || flag_expensive_optimizations)
14053 flags |= LOOKUP_NONVIRTUAL;
14055 rval = build_delete (TREE_TYPE (rval), rval, auto_delete, flags, 0);
14057 if (TYPE_USES_VIRTUAL_BASECLASSES (type)
14058 && ! TYPE_HAS_DESTRUCTOR (type))
14059 rval = build_compound_expr (tree_cons (NULL_TREE, rval,
14060 build_expr_list (NULL_TREE, build_vbase_delete (type, decl))));
14062 if (TREE_CODE (decl) != PARM_DECL)
14063 resume_momentary (temp);
14070 /* Build a TARGET_EXPR, initializing the DECL with the VALUE. */
14073 build_target_expr (decl, value)
14079 t = build (TARGET_EXPR, TREE_TYPE (decl), decl, value,
14080 maybe_build_cleanup (decl), NULL_TREE);
14081 /* We always set TREE_SIDE_EFFECTS so that expand_expr does not
14082 ignore the TARGET_EXPR. If there really turn out to be no
14083 side-effects, then the optimizer should be able to get rid of
14084 whatever code is generated anyhow. */
14085 TREE_SIDE_EFFECTS (t) = 1;
14090 /* If DECL is of a type which needs a cleanup, build that cleanup
14091 here. The cleanup does free the storage with a call to delete. */
14094 maybe_build_cleanup_and_delete (decl)
14097 return maybe_build_cleanup_1 (decl, integer_three_node);
14100 /* If DECL is of a type which needs a cleanup, build that cleanup
14101 here. The cleanup does not free the storage with a call a delete. */
14104 maybe_build_cleanup (decl)
14107 return maybe_build_cleanup_1 (decl, integer_two_node);
14110 /* Expand a C++ expression at the statement level.
14111 This is needed to ferret out nodes which have UNKNOWN_TYPE.
14112 The C++ type checker should get all of these out when
14113 expressions are combined with other, type-providing, expressions,
14114 leaving only orphan expressions, such as:
14116 &class::bar; / / takes its address, but does nothing with it. */
14119 cplus_expand_expr_stmt (exp)
14122 if (stmts_are_full_exprs_p)
14123 exp = convert_to_void (exp, "statement");
14126 /* We should do this eventually, but right now this causes regex.o from
14127 libg++ to miscompile, and tString to core dump. */
14128 exp = build1 (CLEANUP_POINT_EXPR, TREE_TYPE (exp), exp);
14131 /* If we don't do this, we end up down inside expand_expr
14132 trying to do TYPE_MODE on the ERROR_MARK, and really
14133 go outside the bounds of the type. */
14134 if (exp != error_mark_node)
14135 expand_expr_stmt (break_out_cleanups (exp));
14138 /* When a stmt has been parsed, this function is called. */
14143 /* Always assume this statement was not an expression statement. If
14144 it actually was an expression statement, its our callers
14145 responsibility to fix this up. */
14146 last_expr_type = NULL_TREE;
14149 /* Change a static member function definition into a FUNCTION_TYPE, instead
14150 of the METHOD_TYPE that we create when it's originally parsed.
14152 WARNING: DO NOT pass &TREE_TYPE (decl) to FN or &TYPE_ARG_TYPES
14153 (TREE_TYPE (decl)) to ARGTYPES, as doing so will corrupt the types of
14154 other decls. Either pass the addresses of local variables or NULL. */
14157 revert_static_member_fn (decl, fn, argtypes)
14158 tree *decl, *fn, *argtypes;
14161 tree function = fn ? *fn : TREE_TYPE (*decl);
14162 tree args = argtypes ? *argtypes : TYPE_ARG_TYPES (function);
14164 if (CP_TYPE_QUALS (TREE_TYPE (TREE_VALUE (args)))
14165 != TYPE_UNQUALIFIED)
14166 cp_error ("static member function `%#D' declared with type qualifiers",
14169 args = TREE_CHAIN (args);
14170 tmp = build_function_type (TREE_TYPE (function), args);
14171 tmp = build_qualified_type (tmp, CP_TYPE_QUALS (function));
14172 tmp = build_exception_variant (tmp,
14173 TYPE_RAISES_EXCEPTIONS (function));
14174 TREE_TYPE (*decl) = tmp;
14175 if (DECL_ARGUMENTS (*decl))
14176 DECL_ARGUMENTS (*decl) = TREE_CHAIN (DECL_ARGUMENTS (*decl));
14177 DECL_STATIC_FUNCTION_P (*decl) = 1;
14184 /* Initialize the variables used during compilation of a C++
14188 push_cp_function_context (f)
14189 struct function *f;
14191 struct language_function *p
14192 = ((struct language_function *)
14193 xcalloc (1, sizeof (struct language_function)));
14196 /* It takes an explicit call to expand_body to generate RTL for a
14200 /* Whenever we start a new function, we destroy temporaries in the
14202 stmts_are_full_exprs_p = 1;
14205 /* Free the language-specific parts of F, now that we've finished
14206 compiling the function. */
14209 pop_cp_function_context (f)
14210 struct function *f;
14212 free (f->language);
14216 /* Mark P for GC. */
14219 mark_lang_function (p)
14220 struct language_function *p;
14225 ggc_mark_tree (p->x_named_labels);
14226 ggc_mark_tree (p->x_ctor_label);
14227 ggc_mark_tree (p->x_dtor_label);
14228 ggc_mark_tree (p->x_base_init_list);
14229 ggc_mark_tree (p->x_member_init_list);
14230 ggc_mark_tree (p->x_current_class_ptr);
14231 ggc_mark_tree (p->x_current_class_ref);
14232 ggc_mark_tree (p->x_last_tree);
14233 ggc_mark_tree (p->x_last_expr_type);
14234 ggc_mark_tree (p->x_eh_spec_try_block);
14235 ggc_mark_tree (p->x_scope_stmt_stack);
14237 ggc_mark_rtx (p->x_last_dtor_insn);
14238 ggc_mark_rtx (p->x_last_parm_cleanup_insn);
14239 ggc_mark_rtx (p->x_result_rtx);
14241 mark_binding_level (&p->bindings);
14244 /* Mark the language-specific data in F for GC. */
14247 mark_cp_function_context (f)
14248 struct function *f;
14250 mark_lang_function (f->language);
14256 return function_depth != 0;
14261 lang_mark_false_label_stack (l)
14262 struct label_node *l;
14264 /* C++ doesn't use false_label_stack. It better be NULL. */
14265 my_friendly_assert (l == NULL, 19990904);
14272 enum tree_code code = TREE_CODE (t);
14273 if (code == IDENTIFIER_NODE)
14275 struct lang_identifier *li = (struct lang_identifier *) t;
14276 struct lang_id2 *li2 = li->x;
14277 ggc_mark_tree (li->namespace_bindings);
14278 ggc_mark_tree (li->bindings);
14279 ggc_mark_tree (li->class_value);
14280 ggc_mark_tree (li->class_template_info);
14284 ggc_mark_tree (li2->label_value);
14285 ggc_mark_tree (li2->implicit_decl);
14286 ggc_mark_tree (li2->error_locus);
14289 else if (code == CPLUS_BINDING)
14291 if (BINDING_HAS_LEVEL_P (t))
14292 mark_binding_level (&BINDING_LEVEL (t));
14294 ggc_mark_tree (BINDING_SCOPE (t));
14295 ggc_mark_tree (BINDING_VALUE (t));
14297 else if (code == OVERLOAD)
14298 ggc_mark_tree (OVL_FUNCTION (t));
14299 else if (code == TEMPLATE_PARM_INDEX)
14300 ggc_mark_tree (TEMPLATE_PARM_DECL (t));
14301 else if (TREE_CODE_CLASS (code) == 'd')
14303 struct lang_decl *ld = DECL_LANG_SPECIFIC (t);
14308 if (!DECL_GLOBAL_CTOR_P (t) && !DECL_GLOBAL_DTOR_P (t))
14309 ggc_mark_tree (ld->decl_flags.u2.access);
14310 ggc_mark_tree (ld->decl_flags.context);
14311 if (TREE_CODE (t) != NAMESPACE_DECL)
14312 ggc_mark_tree (ld->decl_flags.u.template_info);
14313 if (CAN_HAVE_FULL_LANG_DECL_P (t))
14315 ggc_mark_tree (ld->main_decl_variant);
14316 ggc_mark_tree (ld->befriending_classes);
14317 ggc_mark_tree (ld->saved_tree);
14318 if (TREE_CODE (t) == TYPE_DECL)
14319 ggc_mark_tree (ld->u.sorted_fields);
14320 else if (TREE_CODE (t) == FUNCTION_DECL
14321 && !DECL_PENDING_INLINE_P (t))
14322 mark_lang_function (DECL_SAVED_FUNCTION_DATA (t));
14326 else if (TREE_CODE_CLASS (code) == 't')
14328 struct lang_type *lt = TYPE_LANG_SPECIFIC (t);
14330 if (lt && !(TREE_CODE (t) == POINTER_TYPE
14331 && TREE_CODE (TREE_TYPE (t)) == METHOD_TYPE))
14334 ggc_mark_tree (lt->vfields);
14335 ggc_mark_tree (lt->vbases);
14336 ggc_mark_tree (lt->tags);
14337 ggc_mark_tree (lt->search_slot);
14338 ggc_mark_tree (lt->size);
14339 ggc_mark_tree (lt->abstract_virtuals);
14340 ggc_mark_tree (lt->friend_classes);
14341 ggc_mark_tree (lt->rtti);
14342 ggc_mark_tree (lt->methods);
14343 ggc_mark_tree (lt->template_info);
14344 ggc_mark_tree (lt->befriending_classes);
14347 /* In the case of pointer-to-member function types, the
14348 TYPE_LANG_SPECIFIC is really just a tree. */
14349 ggc_mark_tree ((tree) lt);