1 /* Process declarations and variables for C compiler.
2 Copyright (C) 1988, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000
3 Free Software Foundation, Inc.
4 Contributed by Michael Tiemann (tiemann@cygnus.com)
6 This file is part of GNU CC.
8 GNU CC is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2, or (at your option)
13 GNU CC is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with GNU CC; see the file COPYING. If not, write to
20 the Free Software Foundation, 59 Temple Place - Suite 330,
21 Boston, MA 02111-1307, USA. */
24 /* Process declarations and symbol lookup for C front end.
25 Also constructs types; the standard scalar types at initialization,
26 and structure, union, array and enum types when they are declared. */
28 /* ??? not all decl nodes are given the most useful possible
29 line numbers. For example, the CONST_DECLs for enum values. */
49 #define obstack_chunk_alloc xmalloc
50 #define obstack_chunk_free free
52 extern struct obstack permanent_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) PARAMS ((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 /* In the new ABI, `bool' has size and alignment `1', on all
78 #define BOOL_TYPE_SIZE \
79 ((SLOW_BYTE_ACCESS && !flag_new_abi) ? (POINTER_SIZE) : (CHAR_TYPE_SIZE))
81 #define BOOL_TYPE_SIZE CHAR_TYPE_SIZE
85 /* We let tm.h override the types used here, to handle trivial differences
86 such as the choice of unsigned int or long unsigned int for size_t.
87 When machines start needing nontrivial differences in the size type,
88 it would be best to do something here to figure out automatically
89 from other information what type to use. */
92 #define SIZE_TYPE "long unsigned int"
96 #define PTRDIFF_TYPE "long int"
100 #define WCHAR_TYPE "int"
103 static tree grokparms PARAMS ((tree, int));
104 static const char *redeclaration_error_message PARAMS ((tree, tree));
106 static void push_binding_level PARAMS ((struct binding_level *, int,
108 static void pop_binding_level PARAMS ((void));
109 static void suspend_binding_level PARAMS ((void));
110 static void resume_binding_level PARAMS ((struct binding_level *));
111 static struct binding_level *make_binding_level PARAMS ((void));
112 static void declare_namespace_level PARAMS ((void));
113 static void signal_catch PARAMS ((int)) ATTRIBUTE_NORETURN;
114 static void storedecls PARAMS ((tree));
115 static void require_complete_types_for_parms PARAMS ((tree));
116 static void push_overloaded_decl_1 PARAMS ((tree));
117 static int ambi_op_p PARAMS ((tree));
118 static int unary_op_p PARAMS ((tree));
119 static tree store_bindings PARAMS ((tree, tree));
120 static tree lookup_tag_reverse PARAMS ((tree, tree));
121 static tree obscure_complex_init PARAMS ((tree, tree));
122 static tree maybe_build_cleanup_1 PARAMS ((tree, tree));
123 static tree lookup_name_real PARAMS ((tree, int, int, int));
124 static void warn_extern_redeclared_static PARAMS ((tree, tree));
125 static void grok_reference_init PARAMS ((tree, tree, tree));
126 static tree grokfndecl PARAMS ((tree, tree, tree, tree, int,
127 enum overload_flags, tree,
128 tree, int, int, int, int, int, int, tree));
129 static tree grokvardecl PARAMS ((tree, tree, RID_BIT_TYPE *, int, int, tree));
130 static tree lookup_tag PARAMS ((enum tree_code, tree,
131 struct binding_level *, int));
132 static void set_identifier_type_value_with_scope
133 PARAMS ((tree, tree, struct binding_level *));
134 static void record_builtin_type PARAMS ((enum rid, const char *, tree));
135 static void record_unknown_type PARAMS ((tree, const char *));
136 static int member_function_or_else PARAMS ((tree, tree, enum overload_flags));
137 static void bad_specifiers PARAMS ((tree, const char *, int, int, int, int,
139 static void lang_print_error_function PARAMS ((const char *));
140 static tree maybe_process_template_type_declaration PARAMS ((tree, int, struct binding_level*));
141 static void check_for_uninitialized_const_var PARAMS ((tree));
142 static unsigned long typename_hash PARAMS ((hash_table_key));
143 static boolean typename_compare PARAMS ((hash_table_key, hash_table_key));
144 static void push_binding PARAMS ((tree, tree, struct binding_level*));
145 static int add_binding PARAMS ((tree, tree));
146 static void pop_binding PARAMS ((tree, tree));
147 static tree local_variable_p_walkfn PARAMS ((tree *, int *, void *));
148 static tree find_binding PARAMS ((tree, tree));
149 static tree select_decl PARAMS ((tree, int));
150 static int lookup_flags PARAMS ((int, int));
151 static tree qualify_lookup PARAMS ((tree, int));
152 static tree record_builtin_java_type PARAMS ((const char *, int));
153 static const char *tag_name PARAMS ((enum tag_types code));
154 static void find_class_binding_level PARAMS ((void));
155 static struct binding_level *innermost_nonclass_level PARAMS ((void));
156 static void warn_about_implicit_typename_lookup PARAMS ((tree, tree));
157 static int walk_namespaces_r PARAMS ((tree, walk_namespaces_fn, void *));
158 static int walk_globals_r PARAMS ((tree, void *));
159 static void add_decl_to_level PARAMS ((tree, struct binding_level *));
160 static tree make_label_decl PARAMS ((tree, int));
161 static void pop_label PARAMS ((tree));
162 static void pop_labels PARAMS ((tree));
163 static void maybe_deduce_size_from_array_init PARAMS ((tree, tree));
164 static void layout_var_decl PARAMS ((tree));
165 static void maybe_commonize_var PARAMS ((tree));
166 static tree check_initializer PARAMS ((tree, tree));
167 static void make_rtl_for_nonlocal_decl PARAMS ((tree, tree, const char *));
168 static void push_cp_function_context PARAMS ((struct function *));
169 static void pop_cp_function_context PARAMS ((struct function *));
170 static void mark_binding_level PARAMS ((void *));
171 static void mark_cp_function_context PARAMS ((struct function *));
172 static void mark_saved_scope PARAMS ((void *));
173 static void mark_lang_function PARAMS ((struct language_function *));
174 static void mark_stmt_tree PARAMS ((struct stmt_tree *));
175 static void save_function_data PARAMS ((tree));
176 static void check_function_type PARAMS ((tree));
177 static void destroy_local_var PARAMS ((tree));
178 static void finish_constructor_body PARAMS ((void));
179 static void finish_destructor_body PARAMS ((void));
180 static tree create_array_type_for_decl PARAMS ((tree, tree, tree));
181 static tree get_atexit_node PARAMS ((void));
182 static tree get_dso_handle_node PARAMS ((void));
183 static tree start_cleanup_fn PARAMS ((void));
184 static void end_cleanup_fn PARAMS ((void));
185 static tree cp_make_fname_decl PARAMS ((tree, const char *, int));
187 #if defined (DEBUG_CP_BINDING_LEVELS)
188 static void indent PARAMS ((void));
191 /* Erroneous argument lists can use this *IFF* they do not modify it. */
192 tree error_mark_list;
194 /* The following symbols are subsumed in the cp_global_trees array, and
195 listed here individually for documentation purposes.
198 tree wchar_decl_node;
201 tree vtable_entry_type;
202 tree delta_type_node;
205 tree __baselist_desc_type_node;
206 tree __i_desc_type_node, __m_desc_type_node;
207 tree __t_desc_array_type, __i_desc_array_type, __m_desc_array_type;
209 tree __t_desc_type_node;
211 tree __tp_desc_type_node;
213 tree ti_desc_type_node;
214 tree bltn_desc_type_node, ptr_desc_type_node, ref_desc_type_node;
215 tree ary_desc_type_node, func_desc_type_node, enum_desc_type_node;
216 tree class_desc_type_node, si_class_desc_type_node, vmi_class_desc_type_node;
217 tree ptmd_desc_type_node;
218 tree base_desc_type_node;
220 Not needed yet? May be needed one day?
221 tree __bltn_desc_array_type, __user_desc_array_type, __class_desc_array_type;
222 tree __ptr_desc_array_type, __attr_dec_array_type, __func_desc_array_type;
223 tree __ptmf_desc_array_type, __ptmd_desc_array_type;
226 tree class_type_node, record_type_node, union_type_node, enum_type_node;
227 tree unknown_type_node;
229 Array type `vtable_entry_type[]'
232 tree vtbl_ptr_type_node;
238 A FUNCTION_DECL which can call `abort'. Not necessarily the
239 one that the user will declare, but sufficient to be called
240 by routines that want to abort the program.
244 The FUNCTION_DECL for the default `::operator delete'.
246 tree global_delete_fndecl;
249 tree type_info_type_node, tinfo_decl_id, tinfo_decl_type;
254 tree cp_global_trees[CPTI_MAX];
256 /* Indicates that there is a type value in some namespace, although
257 that is not necessarily in scope at the moment. */
259 static tree global_type_node;
264 /* Expect only namespace names now. */
265 static int only_namespace_names;
267 /* If original DECL_RESULT of current function was a register,
268 but due to being an addressable named return value, would up
269 on the stack, this variable holds the named return value's
270 original location. */
272 #define original_result_rtx cp_function_chain->x_result_rtx
274 struct named_label_list
276 struct binding_level *binding_level;
279 const char *filename_o_goto;
281 struct named_label_list *next;
284 /* Used only for jumps to as-yet undefined labels, since jumps to
285 defined labels can have their validity checked by stmt.c. */
287 #define named_label_uses cp_function_chain->x_named_label_uses
289 /* A list of objects which have constructors or destructors
290 which reside in the global scope. The decl is stored in
291 the TREE_VALUE slot and the initializer is stored
292 in the TREE_PURPOSE slot. */
293 tree static_aggregates;
297 /* A node for the integer constants 2, and 3. */
299 tree integer_two_node, integer_three_node;
301 /* Parsing a function declarator leaves here a chain of structure
302 and enum types declared in the parmlist. */
304 static tree last_function_parm_tags;
306 /* Similar, for last_function_parm_tags. */
307 tree last_function_parms;
308 static tree current_function_parm_tags;
310 /* A list (chain of TREE_LIST nodes) of all LABEL_DECLs in the function
311 that have names. Here so we can clear out their names' definitions
312 at the end of the function. The TREE_VALUE is a LABEL_DECL; the
313 TREE_PURPOSE is the previous binding of the label. */
315 #define named_labels cp_function_chain->x_named_labels
317 /* Set to 0 at beginning of a function definition, and whenever
318 a label (case or named) is defined. Set to value of expression
319 returned from function when that value can be transformed into
320 a named return value. */
322 tree current_function_return_value;
324 /* Nonzero means use the ISO C99 dialect of C. */
328 /* Nonzero means give `double' the same size as `float'. */
330 extern int flag_short_double;
332 /* Nonzero means don't recognize any builtin functions. */
334 extern int flag_no_builtin;
336 /* Nonzero means don't recognize the non-ANSI builtin functions.
339 extern int flag_no_nonansi_builtin;
341 /* Nonzero if we want to support huge (> 2^(sizeof(short)*8-1) bytes)
343 extern int flag_huge_objects;
345 /* Nonzero if we want to conserve space in the .o files. We do this
346 by putting uninitialized data and runtime initialized data into
347 .common instead of .data at the expense of not flagging multiple
349 extern int flag_conserve_space;
351 /* C and C++ flags are in decl2.c. */
353 /* Flag used when debugging spew.c */
355 extern int spew_debug;
357 /* A expression of value 0 with the same precision as a sizetype
359 tree signed_size_zero_node;
361 /* The name of the anonymous namespace, throughout this translation
363 tree anonymous_namespace_name;
366 /* For each binding contour we allocate a binding_level structure
367 which records the names defined in that contour.
370 1) one for each function definition,
371 where internal declarations of the parameters appear.
372 2) one for each compound statement,
373 to record its declarations.
375 The current meaning of a name can be found by searching the levels
376 from the current one out to the global one.
378 Off to the side, may be the class_binding_level. This exists only
379 to catch class-local declarations. It is otherwise nonexistent.
381 Also there may be binding levels that catch cleanups that must be
382 run when exceptions occur. Thus, to see whether a name is bound in
383 the current scope, it is not enough to look in the
384 CURRENT_BINDING_LEVEL. You should use lookup_name_current_level
387 /* Note that the information in the `names' component of the global contour
388 is duplicated in the IDENTIFIER_GLOBAL_VALUEs of all identifiers. */
392 /* A chain of _DECL nodes for all variables, constants, functions,
393 and typedef types. These are in the reverse of the order
394 supplied. There may be OVERLOADs on this list, too, but they
395 are wrapped in TREE_LISTs; the TREE_VALUE is the OVERLOAD. */
398 /* A list of structure, union and enum definitions, for looking up
400 It is a chain of TREE_LIST nodes, each of whose TREE_PURPOSE is a name,
401 or NULL_TREE; and whose TREE_VALUE is a RECORD_TYPE, UNION_TYPE,
402 or ENUMERAL_TYPE node.
404 C++: the TREE_VALUE nodes can be simple types for
405 component_bindings. */
408 /* A list of USING_DECL nodes. */
411 /* A list of used namespaces. PURPOSE is the namespace,
412 VALUE the common ancestor with this binding_level's namespace. */
413 tree using_directives;
415 /* If this binding level is the binding level for a class, then
416 class_shadowed is a TREE_LIST. The TREE_PURPOSE of each node
417 is the name of an entity bound in the class; the TREE_VALUE is
418 the IDENTIFIER_CLASS_VALUE before we entered the class. Thus,
419 when leaving class scope, we can restore the
420 IDENTIFIER_CLASS_VALUE by walking this list. The TREE_TYPE is
421 the DECL bound by this name in the class. */
424 /* Similar to class_shadowed, but for IDENTIFIER_TYPE_VALUE, and
425 is used for all binding levels. */
428 /* A TREE_LIST. Each TREE_VALUE is the LABEL_DECL for a local
429 label in this scope. The TREE_PURPOSE is the previous value of
430 the IDENTIFIER_LABEL VALUE. */
431 tree shadowed_labels;
433 /* For each level (except not the global one),
434 a chain of BLOCK nodes for all the levels
435 that were entered and exited one level down. */
438 /* The BLOCK node for this level, if one has been preallocated.
439 If 0, the BLOCK is allocated (if needed) when the level is popped. */
442 /* The _TYPE node for this level, if parm_flag == 2. */
445 /* The binding level which this one is contained in (inherits from). */
446 struct binding_level *level_chain;
448 /* List of decls in `names' that have incomplete
449 structure or union types. */
452 /* List of VAR_DECLS saved from a previous for statement.
453 These would be dead in ISO-conforming code, but might
454 be referenced in ARM-era code. These are stored in a
455 TREE_LIST; the TREE_VALUE is the actual declaration. */
456 tree dead_vars_from_for;
458 /* 1 for the level that holds the parameters of a function.
459 2 for the level that holds a class declaration.
460 3 for levels that hold parameter declarations. */
461 unsigned parm_flag : 4;
463 /* 1 means make a BLOCK for this level regardless of all else.
464 2 for temporary binding contours created by the compiler. */
467 /* Nonzero if this level "doesn't exist" for tags. */
468 unsigned tag_transparent : 1;
470 /* Nonzero if this level can safely have additional
471 cleanup-needing variables added to it. */
472 unsigned more_cleanups_ok : 1;
473 unsigned have_cleanups : 1;
475 /* Nonzero if this level is for storing the decls for template
476 parameters and generic decls; these decls will be discarded and
477 replaced with a TEMPLATE_DECL. */
478 unsigned pseudo_global : 1;
480 /* This is set for a namespace binding level. */
481 unsigned namespace_p : 1;
483 /* True if this level is that of a for-statement where we need to
484 worry about ambiguous (ARM or ISO) scope rules. */
485 unsigned is_for_scope : 1;
487 /* True if this level corresponds to an EH region, as for a try block. */
488 unsigned eh_region : 1;
490 /* One bit left for this word. */
492 #if defined(DEBUG_CP_BINDING_LEVELS)
493 /* Binding depth at which this level began. */
494 unsigned binding_depth;
495 #endif /* defined(DEBUG_CP_BINDING_LEVELS) */
498 #define NULL_BINDING_LEVEL ((struct binding_level *) NULL)
500 /* The binding level currently in effect. */
502 #define current_binding_level \
504 ? cp_function_chain->bindings \
505 : scope_chain->bindings)
507 /* The binding level of the current class, if any. */
509 #define class_binding_level scope_chain->class_bindings
511 /* A chain of binding_level structures awaiting reuse. */
513 static struct binding_level *free_binding_level;
515 /* The outermost binding level, for names of file scope.
516 This is created when the compiler is started and exists
517 through the entire run. */
519 static struct binding_level *global_binding_level;
521 /* Nonzero means unconditionally make a BLOCK for the next level pushed. */
523 static int keep_next_level_flag;
525 #if defined(DEBUG_CP_BINDING_LEVELS)
526 static int binding_depth = 0;
527 static int is_class_level = 0;
534 for (i = 0; i < binding_depth*2; i++)
537 #endif /* defined(DEBUG_CP_BINDING_LEVELS) */
539 static tree pushdecl_with_scope PARAMS ((tree, struct binding_level *));
542 push_binding_level (newlevel, tag_transparent, keep)
543 struct binding_level *newlevel;
544 int tag_transparent, keep;
546 /* Add this level to the front of the chain (stack) of levels that
548 bzero ((char*) newlevel, sizeof (struct binding_level));
549 newlevel->level_chain = current_binding_level;
550 current_binding_level = newlevel;
551 newlevel->tag_transparent = tag_transparent;
552 newlevel->more_cleanups_ok = 1;
554 /* We are called before expand_start_bindings, but after
555 expand_eh_region_start for a try block; so we check this now,
556 before the EH block is covered up. */
557 newlevel->eh_region = is_eh_region ();
559 newlevel->keep = keep;
560 #if defined(DEBUG_CP_BINDING_LEVELS)
561 newlevel->binding_depth = binding_depth;
563 fprintf (stderr, "push %s level 0x%08x line %d\n",
564 (is_class_level) ? "class" : "block", newlevel, lineno);
567 #endif /* defined(DEBUG_CP_BINDING_LEVELS) */
570 /* Find the innermost enclosing class scope, and reset
571 CLASS_BINDING_LEVEL appropriately. */
574 find_class_binding_level ()
576 struct binding_level *level = current_binding_level;
578 while (level && level->parm_flag != 2)
579 level = level->level_chain;
580 if (level && level->parm_flag == 2)
581 class_binding_level = level;
583 class_binding_level = 0;
589 if (global_binding_level)
591 /* Cannot pop a level, if there are none left to pop. */
592 if (current_binding_level == global_binding_level)
593 my_friendly_abort (123);
595 /* Pop the current level, and free the structure for reuse. */
596 #if defined(DEBUG_CP_BINDING_LEVELS)
599 fprintf (stderr, "pop %s level 0x%08x line %d\n",
600 (is_class_level) ? "class" : "block",
601 current_binding_level, lineno);
602 if (is_class_level != (current_binding_level == class_binding_level))
605 fprintf (stderr, "XXX is_class_level != (current_binding_level == class_binding_level)\n");
608 #endif /* defined(DEBUG_CP_BINDING_LEVELS) */
610 register struct binding_level *level = current_binding_level;
611 current_binding_level = current_binding_level->level_chain;
612 level->level_chain = free_binding_level;
613 #if 0 /* defined(DEBUG_CP_BINDING_LEVELS) */
614 if (level->binding_depth != binding_depth)
616 #endif /* defined(DEBUG_CP_BINDING_LEVELS) */
617 free_binding_level = level;
618 find_class_binding_level ();
623 suspend_binding_level ()
625 if (class_binding_level)
626 current_binding_level = class_binding_level;
628 if (global_binding_level)
630 /* Cannot suspend a level, if there are none left to suspend. */
631 if (current_binding_level == global_binding_level)
632 my_friendly_abort (123);
634 /* Suspend the current level. */
635 #if defined(DEBUG_CP_BINDING_LEVELS)
638 fprintf (stderr, "suspend %s level 0x%08x line %d\n",
639 (is_class_level) ? "class" : "block",
640 current_binding_level, lineno);
641 if (is_class_level != (current_binding_level == class_binding_level))
644 fprintf (stderr, "XXX is_class_level != (current_binding_level == class_binding_level)\n");
647 #endif /* defined(DEBUG_CP_BINDING_LEVELS) */
648 current_binding_level = current_binding_level->level_chain;
649 find_class_binding_level ();
653 resume_binding_level (b)
654 struct binding_level *b;
656 /* Resuming binding levels is meant only for namespaces,
657 and those cannot nest into classes. */
658 my_friendly_assert(!class_binding_level, 386);
659 /* Also, resuming a non-directly nested namespace is a no-no. */
660 my_friendly_assert(b->level_chain == current_binding_level, 386);
661 current_binding_level = b;
662 #if defined(DEBUG_CP_BINDING_LEVELS)
663 b->binding_depth = binding_depth;
665 fprintf (stderr, "resume %s level 0x%08x line %d\n",
666 (is_class_level) ? "class" : "block", b, lineno);
669 #endif /* defined(DEBUG_CP_BINDING_LEVELS) */
672 /* Create a new `struct binding_level'. */
675 struct binding_level *
676 make_binding_level ()
679 return (struct binding_level *) xmalloc (sizeof (struct binding_level));
682 /* Nonzero if we are currently in the global binding level. */
687 return current_binding_level == global_binding_level;
690 /* Return the innermost binding level that is not for a class scope. */
692 static struct binding_level *
693 innermost_nonclass_level ()
695 struct binding_level *b;
697 b = current_binding_level;
698 while (b->parm_flag == 2)
704 /* Nonzero if we are currently in a toplevel binding level. This
705 means either the global binding level or a namespace in a toplevel
706 binding level. Since there are no non-toplevel namespace levels,
707 this really means any namespace or pseudo-global level. We also
708 include a class whose context is toplevel. */
711 toplevel_bindings_p ()
713 struct binding_level *b = innermost_nonclass_level ();
715 return b->namespace_p || b->pseudo_global;
718 /* Nonzero if this is a namespace scope, or if we are defining a class
719 which is itself at namespace scope, or whose enclosing class is
720 such a class, etc. */
723 namespace_bindings_p ()
725 struct binding_level *b = innermost_nonclass_level ();
727 return b->namespace_p;
730 /* If KEEP is non-zero, make a BLOCK node for the next binding level,
731 unconditionally. Otherwise, use the normal logic to decide whether
732 or not to create a BLOCK. */
735 keep_next_level (keep)
738 keep_next_level_flag = keep;
741 /* Nonzero if the current level needs to have a BLOCK made. */
746 return (current_binding_level->blocks != NULL_TREE
747 || current_binding_level->keep
748 || current_binding_level->names != NULL_TREE
749 || (current_binding_level->tags != NULL_TREE
750 && !current_binding_level->tag_transparent));
754 declare_pseudo_global_level ()
756 current_binding_level->pseudo_global = 1;
760 declare_namespace_level ()
762 current_binding_level->namespace_p = 1;
766 pseudo_global_level_p ()
768 return current_binding_level->pseudo_global;
772 set_class_shadows (shadows)
775 class_binding_level->class_shadowed = shadows;
778 /* Enter a new binding level.
779 If TAG_TRANSPARENT is nonzero, do so only for the name space of variables,
780 not for that of tags. */
783 pushlevel (tag_transparent)
786 struct binding_level *newlevel;
788 if (cfun && !doing_semantic_analysis_p ())
791 /* Reuse or create a struct for this binding level. */
792 #if defined(DEBUG_CP_BINDING_LEVELS)
794 #else /* !defined(DEBUG_CP_BINDING_LEVELS) */
795 if (free_binding_level)
796 #endif /* !defined(DEBUG_CP_BINDING_LEVELS) */
798 newlevel = free_binding_level;
799 free_binding_level = free_binding_level->level_chain;
802 newlevel = make_binding_level ();
804 push_binding_level (newlevel, tag_transparent, keep_next_level_flag);
805 GNU_xref_start_scope ((HOST_WIDE_INT) newlevel);
806 keep_next_level_flag = 0;
810 note_level_for_for ()
812 current_binding_level->is_for_scope = 1;
815 /* For a binding between a name and an entity at a block scope,
816 this is the `struct binding_level' for the block. */
817 #define BINDING_LEVEL(NODE) \
818 (((struct tree_binding*)NODE)->scope.level)
820 /* Make DECL the innermost binding for ID. The LEVEL is the binding
821 level at which this declaration is being bound. */
824 push_binding (id, decl, level)
827 struct binding_level* level;
831 binding = make_node (CPLUS_BINDING);
833 /* Now, fill in the binding information. */
834 BINDING_VALUE (binding) = decl;
835 BINDING_TYPE (binding) = NULL_TREE;
836 BINDING_LEVEL (binding) = level;
837 INHERITED_VALUE_BINDING_P (binding) = 0;
838 LOCAL_BINDING_P (binding) = (level != class_binding_level);
839 BINDING_HAS_LEVEL_P (binding) = 1;
841 /* And put it on the front of the list of bindings for ID. */
842 TREE_CHAIN (binding) = IDENTIFIER_BINDING (id);
843 IDENTIFIER_BINDING (id) = binding;
846 /* ID is already bound in the current scope. But, DECL is an
847 additional binding for ID in the same scope. This is the `struct
848 stat' hack whereby a non-typedef class-name or enum-name can be
849 bound at the same level as some other kind of entity. It's the
850 responsibility of the caller to check that inserting this name is
851 legal here. Returns nonzero if the new binding was successful. */
853 add_binding (id, decl)
857 tree binding = IDENTIFIER_BINDING (id);
860 if (TREE_CODE (decl) == TYPE_DECL && DECL_ARTIFICIAL (decl))
861 /* The new name is the type name. */
862 BINDING_TYPE (binding) = decl;
863 else if (!BINDING_VALUE (binding))
864 /* This situation arises when push_class_level_binding moves an
865 inherited type-binding out of the way to make room for a new
867 BINDING_VALUE (binding) = decl;
868 else if (TREE_CODE (BINDING_VALUE (binding)) == TYPE_DECL
869 && DECL_ARTIFICIAL (BINDING_VALUE (binding)))
871 /* The old binding was a type name. It was placed in
872 BINDING_VALUE because it was thought, at the point it was
873 declared, to be the only entity with such a name. Move the
874 type name into the type slot; it is now hidden by the new
876 BINDING_TYPE (binding) = BINDING_VALUE (binding);
877 BINDING_VALUE (binding) = decl;
878 INHERITED_VALUE_BINDING_P (binding) = 0;
880 else if (TREE_CODE (BINDING_VALUE (binding)) == TYPE_DECL
881 && TREE_CODE (decl) == TYPE_DECL
882 && DECL_NAME (decl) == DECL_NAME (BINDING_VALUE (binding))
883 && same_type_p (TREE_TYPE (decl),
884 TREE_TYPE (BINDING_VALUE (binding))))
885 /* We have two typedef-names, both naming the same type to have
886 the same name. This is OK because of:
890 In a given scope, a typedef specifier can be used to redefine
891 the name of any type declared in that scope to refer to the
892 type to which it already refers. */
896 cp_error ("declaration of `%#D'", decl);
897 cp_error_at ("conflicts with previous declaration `%#D'",
898 BINDING_VALUE (binding));
905 /* Add DECL to the list of things declared in B. */
908 add_decl_to_level (decl, b)
910 struct binding_level *b;
912 /* We build up the list in reverse order, and reverse it later if
914 TREE_CHAIN (decl) = b->names;
918 /* Bind DECL to ID in the current_binding_level, assumed to be a local
919 binding level. If PUSH_USING is set in FLAGS, we know that DECL
920 doesn't really belong to this binding level, that it got here
921 through a using-declaration. */
924 push_local_binding (id, decl, flags)
929 struct binding_level *b;
931 /* Skip over any local classes. This makes sense if we call
932 push_local_binding with a friend decl of a local class. */
933 b = current_binding_level;
934 while (b->parm_flag == 2)
937 if (lookup_name_current_level (id))
939 /* Supplement the existing binding. */
940 if (!add_binding (id, decl))
941 /* It didn't work. Something else must be bound at this
942 level. Do not add DECL to the list of things to pop
947 /* Create a new binding. */
948 push_binding (id, decl, b);
950 if (TREE_CODE (decl) == OVERLOAD || (flags & PUSH_USING))
951 /* We must put the OVERLOAD into a TREE_LIST since the
952 TREE_CHAIN of an OVERLOAD is already used. Similarly for
953 decls that got here through a using-declaration. */
954 decl = build_tree_list (NULL_TREE, decl);
956 /* And put DECL on the list of things declared by the current
958 add_decl_to_level (decl, b);
961 /* Bind DECL to ID in the class_binding_level. Returns nonzero if the
962 binding was successful. */
965 push_class_binding (id, decl)
970 tree binding = IDENTIFIER_BINDING (id);
973 /* Note that we declared this value so that we can issue an error if
974 this an illegal redeclaration of a name already used for some
976 note_name_declared_in_class (id, decl);
978 if (binding && BINDING_LEVEL (binding) == class_binding_level)
979 /* Supplement the existing binding. */
980 result = add_binding (id, decl);
982 /* Create a new binding. */
983 push_binding (id, decl, class_binding_level);
985 /* Update the IDENTIFIER_CLASS_VALUE for this ID to be the
986 class-level declaration. Note that we do not use DECL here
987 because of the possibility of the `struct stat' hack; if DECL is
988 a class-name or enum-name we might prefer a field-name, or some
990 IDENTIFIER_CLASS_VALUE (id) = BINDING_VALUE (IDENTIFIER_BINDING (id));
992 /* If this is a binding from a base class, mark it as such. */
993 binding = IDENTIFIER_BINDING (id);
994 if (BINDING_VALUE (binding) == decl && TREE_CODE (decl) != TREE_LIST)
996 /* Any implicit typename must be from a base-class. The
997 context for an implicit typename declaration is always
998 the derived class in which the lookup was done, so the checks
999 based on the context of DECL below will not trigger. */
1000 if (IMPLICIT_TYPENAME_TYPE_DECL_P (decl))
1001 INHERITED_VALUE_BINDING_P (binding) = 1;
1004 if (TREE_CODE (decl) == OVERLOAD)
1005 context = CP_DECL_CONTEXT (OVL_CURRENT (decl));
1008 my_friendly_assert (TREE_CODE_CLASS (TREE_CODE (decl)) == 'd',
1010 context = CP_DECL_CONTEXT (decl);
1013 if (is_properly_derived_from (current_class_type, context))
1014 INHERITED_VALUE_BINDING_P (binding) = 1;
1016 INHERITED_VALUE_BINDING_P (binding) = 0;
1019 else if (BINDING_VALUE (binding) == decl)
1020 /* We only encounter a TREE_LIST when push_class_decls detects an
1021 ambiguity. Such an ambiguity can be overridden by a definition
1023 INHERITED_VALUE_BINDING_P (binding) = 1;
1028 /* Remove the binding for DECL which should be the innermost binding
1032 pop_binding (id, decl)
1038 if (id == NULL_TREE)
1039 /* It's easiest to write the loops that call this function without
1040 checking whether or not the entities involved have names. We
1041 get here for such an entity. */
1044 /* Get the innermost binding for ID. */
1045 binding = IDENTIFIER_BINDING (id);
1047 /* The name should be bound. */
1048 my_friendly_assert (binding != NULL_TREE, 0);
1050 /* The DECL will be either the ordinary binding or the type
1051 binding for this identifier. Remove that binding. */
1052 if (BINDING_VALUE (binding) == decl)
1053 BINDING_VALUE (binding) = NULL_TREE;
1054 else if (BINDING_TYPE (binding) == decl)
1055 BINDING_TYPE (binding) = NULL_TREE;
1057 my_friendly_abort (0);
1059 if (!BINDING_VALUE (binding) && !BINDING_TYPE (binding))
1060 /* We're completely done with the innermost binding for this
1061 identifier. Unhook it from the list of bindings. */
1062 IDENTIFIER_BINDING (id) = TREE_CHAIN (binding);
1065 /* When a label goes out of scope, check to see if that label was used
1066 in a valid manner, and issue any appropriate warnings or errors. */
1072 tree label = TREE_VALUE (link);
1074 if (!processing_template_decl && doing_semantic_analysis_p ())
1076 if (DECL_INITIAL (label) == NULL_TREE)
1078 cp_error_at ("label `%D' used but not defined", label);
1079 /* Avoid crashing later. */
1080 define_label (input_filename, 1, DECL_NAME (label));
1082 else if (warn_unused && !TREE_USED (label))
1083 cp_warning_at ("label `%D' defined but not used", label);
1086 SET_IDENTIFIER_LABEL_VALUE (DECL_NAME (label), TREE_PURPOSE (link));
1089 /* At the end of a function, all labels declared within the fucntion
1090 go out of scope. BLOCK is the top-level block for the
1099 /* Clear out the definitions of all label names, since their scopes
1101 for (link = named_labels; link; link = TREE_CHAIN (link))
1104 /* Put the labels into the "variables" of the top-level block,
1105 so debugger can see them. */
1106 TREE_CHAIN (TREE_VALUE (link)) = BLOCK_VARS (block);
1107 BLOCK_VARS (block) = TREE_VALUE (link);
1110 named_labels = NULL_TREE;
1113 /* Exit a binding level.
1114 Pop the level off, and restore the state of the identifier-decl mappings
1115 that were in effect when this level was entered.
1117 If KEEP == 1, this level had explicit declarations, so
1118 and create a "block" (a BLOCK node) for the level
1119 to record its declarations and subblocks for symbol table output.
1121 If FUNCTIONBODY is nonzero, this level is the body of a function,
1122 so create a block as if KEEP were set and also clear out all
1125 If REVERSE is nonzero, reverse the order of decls before putting
1126 them into the BLOCK. */
1129 poplevel (keep, reverse, functionbody)
1135 /* The chain of decls was accumulated in reverse order.
1136 Put it into forward order, just for cleanliness. */
1138 int tmp = functionbody;
1139 int real_functionbody;
1142 tree block = NULL_TREE;
1144 int block_previously_created;
1145 int leaving_for_scope;
1147 if (cfun && !doing_semantic_analysis_p ())
1150 my_friendly_assert (current_binding_level->parm_flag != 2,
1153 real_functionbody = (current_binding_level->keep == 2
1154 ? ((functionbody = 0), tmp) : functionbody);
1155 tags = functionbody >= 0 ? current_binding_level->tags : 0;
1156 subblocks = functionbody >= 0 ? current_binding_level->blocks : 0;
1158 my_friendly_assert (!current_binding_level->class_shadowed,
1161 /* We used to use KEEP == 2 to indicate that the new block should go
1162 at the beginning of the list of blocks at this binding level,
1163 rather than the end. This hack is no longer used. */
1164 my_friendly_assert (keep == 0 || keep == 1, 0);
1166 GNU_xref_end_scope ((HOST_WIDE_INT) current_binding_level,
1167 (HOST_WIDE_INT) current_binding_level->level_chain,
1168 current_binding_level->parm_flag,
1169 current_binding_level->keep);
1171 if (current_binding_level->keep == 1)
1174 /* Get the decls in the order they were written.
1175 Usually current_binding_level->names is in reverse order.
1176 But parameter decls were previously put in forward order. */
1179 current_binding_level->names
1180 = decls = nreverse (current_binding_level->names);
1182 decls = current_binding_level->names;
1184 /* Output any nested inline functions within this block
1185 if they weren't already output. */
1186 for (decl = decls; decl; decl = TREE_CHAIN (decl))
1187 if (TREE_CODE (decl) == FUNCTION_DECL
1188 && ! TREE_ASM_WRITTEN (decl)
1189 && DECL_INITIAL (decl) != NULL_TREE
1190 && TREE_ADDRESSABLE (decl)
1191 && decl_function_context (decl) == current_function_decl)
1193 /* If this decl was copied from a file-scope decl
1194 on account of a block-scope extern decl,
1195 propagate TREE_ADDRESSABLE to the file-scope decl. */
1196 if (DECL_ABSTRACT_ORIGIN (decl) != NULL_TREE)
1197 TREE_ADDRESSABLE (DECL_ABSTRACT_ORIGIN (decl)) = 1;
1200 push_function_context ();
1201 output_inline_function (decl);
1202 pop_function_context ();
1206 /* When not in function-at-a-time mode, expand_end_bindings will
1207 warn about unused variables. But, in function-at-a-time mode
1208 expand_end_bindings is not passed the list of variables in the
1209 current scope, and therefore no warning is emitted. So, we
1210 explicitly warn here. */
1211 if (!processing_template_decl)
1212 warn_about_unused_variables (getdecls ());
1214 /* If there were any declarations or structure tags in that level,
1215 or if this level is a function body,
1216 create a BLOCK to record them for the life of this function. */
1218 block_previously_created = (current_binding_level->this_block != NULL_TREE);
1219 if (block_previously_created)
1220 block = current_binding_level->this_block;
1221 else if (keep == 1 || functionbody)
1222 block = make_node (BLOCK);
1223 if (block != NULL_TREE)
1225 if (block_previously_created)
1227 if (decls || tags || subblocks)
1229 if (BLOCK_VARS (block))
1230 warning ("internal compiler error: debugging info corrupted");
1232 BLOCK_VARS (block) = decls;
1234 /* We can have previous subblocks and new subblocks when
1235 doing fixup_gotos with complex cleanups. We chain the new
1236 subblocks onto the end of any pre-existing subblocks. */
1237 BLOCK_SUBBLOCKS (block) = chainon (BLOCK_SUBBLOCKS (block),
1243 BLOCK_VARS (block) = decls;
1244 BLOCK_SUBBLOCKS (block) = subblocks;
1248 /* In each subblock, record that this is its superior. */
1250 for (link = subblocks; link; link = TREE_CHAIN (link))
1251 BLOCK_SUPERCONTEXT (link) = block;
1253 /* We still support the old for-scope rules, whereby the variables
1254 in a for-init statement were in scope after the for-statement
1255 ended. We only use the new rules in flag_new_for_scope is
1258 = current_binding_level->is_for_scope && flag_new_for_scope == 1;
1260 /* Remove declarations for all the DECLs in this level. */
1261 for (link = decls; link; link = TREE_CHAIN (link))
1263 if (leaving_for_scope && TREE_CODE (link) == VAR_DECL)
1266 = TREE_CHAIN (IDENTIFIER_BINDING (DECL_NAME (link)));
1270 ns_binding = IDENTIFIER_NAMESPACE_VALUE (DECL_NAME (link));
1272 ns_binding = NULL_TREE;
1275 && (BINDING_LEVEL (outer_binding)
1276 == current_binding_level->level_chain))
1277 /* We have something like:
1282 and we are leaving the `for' scope. There's no reason to
1283 keep the binding of the inner `i' in this case. */
1284 pop_binding (DECL_NAME (link), link);
1285 else if ((outer_binding
1286 && (TREE_CODE (BINDING_VALUE (outer_binding))
1289 && TREE_CODE (ns_binding) == TYPE_DECL))
1290 /* Here, we have something like:
1298 We must pop the for-scope binding so we know what's a
1299 type and what isn't. */
1300 pop_binding (DECL_NAME (link), link);
1303 /* Mark this VAR_DECL as dead so that we can tell we left it
1304 there only for backward compatibility. */
1305 DECL_DEAD_FOR_LOCAL (link) = 1;
1307 /* Keep track of what should of have happenned when we
1308 popped the binding. */
1309 if (outer_binding && BINDING_VALUE (outer_binding))
1310 DECL_SHADOWED_FOR_VAR (link)
1311 = BINDING_VALUE (outer_binding);
1313 /* Add it to the list of dead variables in the next
1314 outermost binding to that we can remove these when we
1315 leave that binding. */
1316 current_binding_level->level_chain->dead_vars_from_for
1317 = tree_cons (NULL_TREE, link,
1318 current_binding_level->level_chain->
1319 dead_vars_from_for);
1321 /* Although we don't pop the CPLUS_BINDING, we do clear
1322 its BINDING_LEVEL since the level is going away now. */
1323 BINDING_LEVEL (IDENTIFIER_BINDING (DECL_NAME (link)))
1329 /* Remove the binding. */
1331 if (TREE_CODE (decl) == TREE_LIST)
1332 decl = TREE_VALUE (decl);
1333 if (TREE_CODE_CLASS (TREE_CODE (decl)) == 'd')
1334 pop_binding (DECL_NAME (decl), decl);
1335 else if (TREE_CODE (decl) == OVERLOAD)
1336 pop_binding (DECL_NAME (OVL_FUNCTION (decl)), decl);
1338 my_friendly_abort (0);
1342 /* Remove declarations for any `for' variables from inner scopes
1343 that we kept around. */
1344 for (link = current_binding_level->dead_vars_from_for;
1345 link; link = TREE_CHAIN (link))
1346 pop_binding (DECL_NAME (TREE_VALUE (link)), TREE_VALUE (link));
1348 /* Restore the IDENTIFIER_TYPE_VALUEs. */
1349 for (link = current_binding_level->type_shadowed;
1350 link; link = TREE_CHAIN (link))
1351 SET_IDENTIFIER_TYPE_VALUE (TREE_PURPOSE (link), TREE_VALUE (link));
1353 /* Restore the IDENTIFIER_LABEL_VALUEs for local labels. */
1354 for (link = current_binding_level->shadowed_labels;
1356 link = TREE_CHAIN (link))
1359 /* There may be OVERLOADs (wrapped in TREE_LISTs) on the BLOCK_VARs
1360 list if a `using' declaration put them there. The debugging
1361 back-ends won't understand OVERLOAD, so we remove them here.
1362 Because the BLOCK_VARS are (temporarily) shared with
1363 CURRENT_BINDING_LEVEL->NAMES we must do this fixup after we have
1364 popped all the bindings. */
1369 for (d = &BLOCK_VARS (block); *d; )
1371 if (TREE_CODE (*d) == TREE_LIST)
1372 *d = TREE_CHAIN (*d);
1374 d = &TREE_CHAIN (*d);
1378 /* If the level being exited is the top level of a function,
1379 check over all the labels. */
1382 /* Since this is the top level block of a function, the vars are
1383 the function's parameters. Don't leave them in the BLOCK
1384 because they are found in the FUNCTION_DECL instead. */
1385 BLOCK_VARS (block) = 0;
1389 /* Any uses of undefined labels now operate under constraints
1390 of next binding contour. */
1393 struct binding_level *level_chain;
1394 level_chain = current_binding_level->level_chain;
1397 struct named_label_list *labels;
1398 for (labels = named_label_uses; labels; labels = labels->next)
1399 if (labels->binding_level == current_binding_level)
1401 labels->binding_level = level_chain;
1402 labels->names_in_scope = level_chain->names;
1407 tmp = current_binding_level->keep;
1409 pop_binding_level ();
1411 DECL_INITIAL (current_function_decl) = block;
1414 if (!block_previously_created)
1415 current_binding_level->blocks
1416 = chainon (current_binding_level->blocks, block);
1418 /* If we did not make a block for the level just exited,
1419 any blocks made for inner levels
1420 (since they cannot be recorded as subblocks in that level)
1421 must be carried forward so they will later become subblocks
1422 of something else. */
1424 current_binding_level->blocks
1425 = chainon (current_binding_level->blocks, subblocks);
1427 /* Each and every BLOCK node created here in `poplevel' is important
1428 (e.g. for proper debugging information) so if we created one
1429 earlier, mark it as "used". */
1431 TREE_USED (block) = 1;
1433 /* Take care of compiler's internal binding structures. */
1439 = add_scope_stmt (/*begin_p=*/0, /*partial_p=*/1);
1442 SCOPE_STMT_BLOCK (TREE_PURPOSE (scope_stmts)) = block;
1443 SCOPE_STMT_BLOCK (TREE_VALUE (scope_stmts)) = block;
1446 block = poplevel (keep, reverse, functionbody);
1452 /* Delete the node BLOCK from the current binding level.
1453 This is used for the block inside a stmt expr ({...})
1454 so that the block can be reinserted where appropriate. */
1457 delete_block (block)
1461 if (current_binding_level->blocks == block)
1462 current_binding_level->blocks = TREE_CHAIN (block);
1463 for (t = current_binding_level->blocks; t;)
1465 if (TREE_CHAIN (t) == block)
1466 TREE_CHAIN (t) = TREE_CHAIN (block);
1470 TREE_CHAIN (block) = NULL_TREE;
1471 /* Clear TREE_USED which is always set by poplevel.
1472 The flag is set again if insert_block is called. */
1473 TREE_USED (block) = 0;
1476 /* Insert BLOCK at the end of the list of subblocks of the
1477 current binding level. This is used when a BIND_EXPR is expanded,
1478 to handle the BLOCK node inside the BIND_EXPR. */
1481 insert_block (block)
1484 TREE_USED (block) = 1;
1485 current_binding_level->blocks
1486 = chainon (current_binding_level->blocks, block);
1489 /* Set the BLOCK node for the innermost scope
1490 (the one we are currently in). */
1494 register tree block;
1496 current_binding_level->this_block = block;
1499 /* Do a pushlevel for class declarations. */
1504 register struct binding_level *newlevel;
1506 /* Reuse or create a struct for this binding level. */
1507 #if defined(DEBUG_CP_BINDING_LEVELS)
1509 #else /* !defined(DEBUG_CP_BINDING_LEVELS) */
1510 if (free_binding_level)
1511 #endif /* !defined(DEBUG_CP_BINDING_LEVELS) */
1513 newlevel = free_binding_level;
1514 free_binding_level = free_binding_level->level_chain;
1517 newlevel = make_binding_level ();
1519 #if defined(DEBUG_CP_BINDING_LEVELS)
1521 #endif /* defined(DEBUG_CP_BINDING_LEVELS) */
1523 push_binding_level (newlevel, 0, 0);
1525 class_binding_level = current_binding_level;
1526 class_binding_level->parm_flag = 2;
1527 class_binding_level->this_class = current_class_type;
1530 /* ...and a poplevel for class declarations. */
1535 register struct binding_level *level = class_binding_level;
1538 my_friendly_assert (level != 0, 354);
1540 /* If we're leaving a toplevel class, don't bother to do the setting
1541 of IDENTIFIER_CLASS_VALUE to NULL_TREE, since first of all this slot
1542 shouldn't even be used when current_class_type isn't set, and second,
1543 if we don't touch it here, we're able to use the cache effect if the
1544 next time we're entering a class scope, it is the same class. */
1545 if (current_class_depth != 1)
1547 struct binding_level* b;
1549 /* Clear out our IDENTIFIER_CLASS_VALUEs. */
1550 for (shadowed = level->class_shadowed;
1552 shadowed = TREE_CHAIN (shadowed))
1553 IDENTIFIER_CLASS_VALUE (TREE_PURPOSE (shadowed)) = NULL_TREE;
1555 /* Find the next enclosing class, and recreate
1556 IDENTIFIER_CLASS_VALUEs appropriate for that class. */
1557 b = level->level_chain;
1558 while (b && b->parm_flag != 2)
1562 for (shadowed = b->class_shadowed;
1564 shadowed = TREE_CHAIN (shadowed))
1568 t = IDENTIFIER_BINDING (TREE_PURPOSE (shadowed));
1569 while (t && BINDING_LEVEL (t) != b)
1573 IDENTIFIER_CLASS_VALUE (TREE_PURPOSE (shadowed))
1574 = BINDING_VALUE (t);
1578 /* Remember to save what IDENTIFIER's were bound in this scope so we
1579 can recover from cache misses. */
1581 previous_class_type = current_class_type;
1582 previous_class_values = class_binding_level->class_shadowed;
1584 for (shadowed = level->type_shadowed;
1586 shadowed = TREE_CHAIN (shadowed))
1587 SET_IDENTIFIER_TYPE_VALUE (TREE_PURPOSE (shadowed), TREE_VALUE (shadowed));
1589 /* Remove the bindings for all of the class-level declarations. */
1590 for (shadowed = level->class_shadowed;
1592 shadowed = TREE_CHAIN (shadowed))
1593 pop_binding (TREE_PURPOSE (shadowed), TREE_TYPE (shadowed));
1595 GNU_xref_end_scope ((HOST_WIDE_INT) class_binding_level,
1596 (HOST_WIDE_INT) class_binding_level->level_chain,
1597 class_binding_level->parm_flag,
1598 class_binding_level->keep);
1600 /* Now, pop out of the binding level which we created up in the
1601 `pushlevel_class' routine. */
1602 #if defined(DEBUG_CP_BINDING_LEVELS)
1604 #endif /* defined(DEBUG_CP_BINDING_LEVELS) */
1606 pop_binding_level ();
1609 /* We are entering the scope of a class. Clear IDENTIFIER_CLASS_VALUE
1610 for any names in enclosing classes. */
1613 clear_identifier_class_values ()
1617 if (!class_binding_level)
1620 for (t = class_binding_level->class_shadowed;
1623 IDENTIFIER_CLASS_VALUE (TREE_PURPOSE (t)) = NULL_TREE;
1626 /* Returns non-zero if T is a virtual function table. */
1629 vtable_decl_p (t, data)
1631 void *data ATTRIBUTE_UNUSED;
1633 return (TREE_CODE (t) == VAR_DECL && DECL_VIRTUAL_P (t));
1636 /* Returns non-zero if T is a TYPE_DECL for a type with virtual
1640 vtype_decl_p (t, data)
1642 void *data ATTRIBUTE_UNUSED;
1644 return (TREE_CODE (t) == TYPE_DECL
1645 && TREE_TYPE (t) != error_mark_node
1646 && TYPE_LANG_SPECIFIC (TREE_TYPE (t))
1647 && CLASSTYPE_VSIZE (TREE_TYPE (t)));
1650 /* Return the declarations that are members of the namespace NS. */
1653 cp_namespace_decls (ns)
1656 return NAMESPACE_LEVEL (ns)->names;
1659 /* Walk all the namespaces contained NAMESPACE, including NAMESPACE
1660 itself, calling F for each. The DATA is passed to F as well. */
1663 walk_namespaces_r (namespace, f, data)
1665 walk_namespaces_fn f;
1671 result |= (*f) (namespace, data);
1673 for (current = cp_namespace_decls (namespace);
1675 current = TREE_CHAIN (current))
1677 if (TREE_CODE (current) != NAMESPACE_DECL
1678 || DECL_NAMESPACE_ALIAS (current))
1680 if (!DECL_LANG_SPECIFIC (current))
1683 my_friendly_assert (current == std_node, 393);
1687 /* We found a namespace. */
1688 result |= walk_namespaces_r (current, f, data);
1694 /* Walk all the namespaces, calling F for each. The DATA is passed to
1698 walk_namespaces (f, data)
1699 walk_namespaces_fn f;
1702 return walk_namespaces_r (global_namespace, f, data);
1705 struct walk_globals_data {
1706 walk_globals_pred p;
1711 /* Walk the global declarations in NAMESPACE. Whenever one is found
1712 for which P returns non-zero, call F with its address. If any call
1713 to F returns a non-zero value, return a non-zero value. */
1716 walk_globals_r (namespace, data)
1720 struct walk_globals_data* wgd = (struct walk_globals_data *) data;
1721 walk_globals_pred p = wgd->p;
1722 walk_globals_fn f = wgd->f;
1723 void *d = wgd->data;
1727 t = &NAMESPACE_LEVEL (namespace)->names;
1734 result |= (*f) (t, d);
1736 /* If F changed *T, then *T still points at the next item to
1739 t = &TREE_CHAIN (*t);
1745 /* Walk the global declarations. Whenever one is found for which P
1746 returns non-zero, call F with its address. If any call to F
1747 returns a non-zero value, return a non-zero value. */
1750 walk_globals (p, f, data)
1751 walk_globals_pred p;
1755 struct walk_globals_data wgd;
1760 return walk_namespaces (walk_globals_r, &wgd);
1763 /* Call wrapup_globals_declarations for the globals in NAMESPACE. If
1764 DATA is non-NULL, this is the last time we will call
1765 wrapup_global_declarations for this NAMESPACE. */
1768 wrapup_globals_for_namespace (namespace, data)
1772 tree globals = cp_namespace_decls (namespace);
1773 int len = list_length (globals);
1774 tree *vec = (tree *) alloca (sizeof (tree) * len);
1778 int last_time = (data != 0);
1780 if (last_time && namespace == global_namespace)
1781 /* Let compile_file handle the global namespace. */
1784 /* Process the decls in reverse order--earliest first.
1785 Put them into VEC from back to front, then take out from front. */
1787 for (i = 0, decl = globals; i < len; i++, decl = TREE_CHAIN (decl))
1789 /* Pretend we've output an unused static variable. This ensures
1790 that the toplevel __FUNCTION__ etc won't be emitted, unless
1792 if (TREE_CODE (decl) == VAR_DECL && TREE_STATIC (decl)
1793 && !TREE_USED (decl))
1794 TREE_ASM_WRITTEN (decl) = 1;
1795 vec[len - i - 1] = decl;
1800 check_global_declarations (vec, len);
1804 /* Temporarily mark vtables as external. That prevents
1805 wrapup_global_declarations from writing them out; we must process
1806 them ourselves in finish_vtable_vardecl. */
1807 for (i = 0; i < len; ++i)
1808 if (vtable_decl_p (vec[i], /*data=*/0) && !DECL_EXTERNAL (vec[i]))
1810 DECL_NOT_REALLY_EXTERN (vec[i]) = 1;
1811 DECL_EXTERNAL (vec[i]) = 1;
1814 /* Write out any globals that need to be output. */
1815 result = wrapup_global_declarations (vec, len);
1817 /* Undo the hack to DECL_EXTERNAL above. */
1818 for (i = 0; i < len; ++i)
1819 if (vtable_decl_p (vec[i], /*data=*/0)
1820 && DECL_NOT_REALLY_EXTERN (vec[i]))
1822 DECL_NOT_REALLY_EXTERN (vec[i]) = 0;
1823 DECL_EXTERNAL (vec[i]) = 0;
1830 /* Mark ARG (which is really a struct binding_level **) for GC. */
1833 mark_binding_level (arg)
1836 struct binding_level *lvl = *(struct binding_level **)arg;
1840 ggc_mark_tree (lvl->names);
1841 ggc_mark_tree (lvl->tags);
1842 ggc_mark_tree (lvl->usings);
1843 ggc_mark_tree (lvl->using_directives);
1844 ggc_mark_tree (lvl->class_shadowed);
1845 ggc_mark_tree (lvl->type_shadowed);
1846 ggc_mark_tree (lvl->shadowed_labels);
1847 ggc_mark_tree (lvl->blocks);
1848 ggc_mark_tree (lvl->this_block);
1849 ggc_mark_tree (lvl->this_class);
1850 ggc_mark_tree (lvl->incomplete);
1851 ggc_mark_tree (lvl->dead_vars_from_for);
1853 lvl = lvl->level_chain;
1857 /* For debugging. */
1858 static int no_print_functions = 0;
1859 static int no_print_builtins = 0;
1862 print_binding_level (lvl)
1863 struct binding_level *lvl;
1867 fprintf (stderr, " blocks=");
1868 fprintf (stderr, HOST_PTR_PRINTF, lvl->blocks);
1869 fprintf (stderr, " n_incomplete=%d parm_flag=%d keep=%d",
1870 list_length (lvl->incomplete), lvl->parm_flag, lvl->keep);
1871 if (lvl->tag_transparent)
1872 fprintf (stderr, " tag-transparent");
1873 if (lvl->more_cleanups_ok)
1874 fprintf (stderr, " more-cleanups-ok");
1875 if (lvl->have_cleanups)
1876 fprintf (stderr, " have-cleanups");
1877 fprintf (stderr, "\n");
1880 fprintf (stderr, " names:\t");
1881 /* We can probably fit 3 names to a line? */
1882 for (t = lvl->names; t; t = TREE_CHAIN (t))
1884 if (no_print_functions && (TREE_CODE (t) == FUNCTION_DECL))
1886 if (no_print_builtins
1887 && (TREE_CODE (t) == TYPE_DECL)
1888 && (!strcmp (DECL_SOURCE_FILE (t),"<built-in>")))
1891 /* Function decls tend to have longer names. */
1892 if (TREE_CODE (t) == FUNCTION_DECL)
1899 fprintf (stderr, "\n\t");
1902 print_node_brief (stderr, "", t, 0);
1903 if (t == error_mark_node)
1907 fprintf (stderr, "\n");
1911 fprintf (stderr, " tags:\t");
1913 for (t = lvl->tags; t; t = TREE_CHAIN (t))
1915 if (TREE_PURPOSE (t) == NULL_TREE)
1917 else if (TREE_PURPOSE (t) == TYPE_IDENTIFIER (TREE_VALUE (t)))
1924 fprintf (stderr, "\n\t");
1927 if (TREE_PURPOSE (t) == NULL_TREE)
1929 print_node_brief (stderr, "<unnamed-typedef", TREE_VALUE (t), 0);
1930 fprintf (stderr, ">");
1932 else if (TREE_PURPOSE (t) == TYPE_IDENTIFIER (TREE_VALUE (t)))
1933 print_node_brief (stderr, "", TREE_VALUE (t), 0);
1936 print_node_brief (stderr, "<typedef", TREE_PURPOSE (t), 0);
1937 print_node_brief (stderr, "", TREE_VALUE (t), 0);
1938 fprintf (stderr, ">");
1942 fprintf (stderr, "\n");
1944 if (lvl->class_shadowed)
1946 fprintf (stderr, " class-shadowed:");
1947 for (t = lvl->class_shadowed; t; t = TREE_CHAIN (t))
1949 fprintf (stderr, " %s ", IDENTIFIER_POINTER (TREE_PURPOSE (t)));
1951 fprintf (stderr, "\n");
1953 if (lvl->type_shadowed)
1955 fprintf (stderr, " type-shadowed:");
1956 for (t = lvl->type_shadowed; t; t = TREE_CHAIN (t))
1958 fprintf (stderr, " %s ", IDENTIFIER_POINTER (TREE_PURPOSE (t)));
1960 fprintf (stderr, "\n");
1965 print_other_binding_stack (stack)
1966 struct binding_level *stack;
1968 struct binding_level *level;
1969 for (level = stack; level != global_binding_level; level = level->level_chain)
1971 fprintf (stderr, "binding level ");
1972 fprintf (stderr, HOST_PTR_PRINTF, level);
1973 fprintf (stderr, "\n");
1974 print_binding_level (level);
1979 print_binding_stack ()
1981 struct binding_level *b;
1982 fprintf (stderr, "current_binding_level=");
1983 fprintf (stderr, HOST_PTR_PRINTF, current_binding_level);
1984 fprintf (stderr, "\nclass_binding_level=");
1985 fprintf (stderr, HOST_PTR_PRINTF, class_binding_level);
1986 fprintf (stderr, "\nglobal_binding_level=");
1987 fprintf (stderr, HOST_PTR_PRINTF, global_binding_level);
1988 fprintf (stderr, "\n");
1989 if (class_binding_level)
1991 for (b = class_binding_level; b; b = b->level_chain)
1992 if (b == current_binding_level)
1995 b = class_binding_level;
1997 b = current_binding_level;
2000 b = current_binding_level;
2001 print_other_binding_stack (b);
2002 fprintf (stderr, "global:\n");
2003 print_binding_level (global_binding_level);
2006 /* Namespace binding access routines: The namespace_bindings field of
2007 the identifier is polymorphic, with three possible values:
2008 NULL_TREE, a list of CPLUS_BINDINGS, or any other tree_node
2009 indicating the BINDING_VALUE of global_namespace. */
2011 /* Check whether the a binding for the name to scope is known.
2012 Assumes that the bindings of the name are already a list
2013 of bindings. Returns the binding found, or NULL_TREE. */
2016 find_binding (name, scope)
2020 tree iter, prev = NULL_TREE;
2022 scope = ORIGINAL_NAMESPACE (scope);
2024 for (iter = IDENTIFIER_NAMESPACE_BINDINGS (name); iter;
2025 iter = TREE_CHAIN (iter))
2027 my_friendly_assert (TREE_CODE (iter) == CPLUS_BINDING, 374);
2028 if (BINDING_SCOPE (iter) == scope)
2030 /* Move binding found to the front of the list, so
2031 subsequent lookups will find it faster. */
2034 TREE_CHAIN (prev) = TREE_CHAIN (iter);
2035 TREE_CHAIN (iter) = IDENTIFIER_NAMESPACE_BINDINGS (name);
2036 IDENTIFIER_NAMESPACE_BINDINGS (name) = iter;
2045 /* Always returns a binding for name in scope. If the
2046 namespace_bindings is not a list, convert it to one first.
2047 If no binding is found, make a new one. */
2050 binding_for_name (name, scope)
2054 tree b = IDENTIFIER_NAMESPACE_BINDINGS (name);
2057 scope = ORIGINAL_NAMESPACE (scope);
2059 if (b && TREE_CODE (b) != CPLUS_BINDING)
2061 /* Get rid of optimization for global scope. */
2062 IDENTIFIER_NAMESPACE_BINDINGS (name) = NULL_TREE;
2063 BINDING_VALUE (binding_for_name (name, global_namespace)) = b;
2064 b = IDENTIFIER_NAMESPACE_BINDINGS (name);
2066 if (b && (result = find_binding (name, scope)))
2068 /* Not found, make a new one. */
2069 result = make_node (CPLUS_BINDING);
2070 TREE_CHAIN (result) = b;
2071 IDENTIFIER_NAMESPACE_BINDINGS (name) = result;
2072 BINDING_SCOPE (result) = scope;
2073 BINDING_TYPE (result) = NULL_TREE;
2074 BINDING_VALUE (result) = NULL_TREE;
2078 /* Return the binding value for name in scope, considering that
2079 namespace_binding may or may not be a list of CPLUS_BINDINGS. */
2082 namespace_binding (name, scope)
2086 tree b = IDENTIFIER_NAMESPACE_BINDINGS (name);
2089 if (scope == NULL_TREE)
2090 scope = global_namespace;
2091 if (TREE_CODE (b) != CPLUS_BINDING)
2092 return (scope == global_namespace) ? b : NULL_TREE;
2093 name = find_binding (name,scope);
2094 if (name == NULL_TREE)
2096 return BINDING_VALUE (name);
2099 /* Set the binding value for name in scope. If modifying the binding
2100 of global_namespace is attempted, try to optimize it. */
2103 set_namespace_binding (name, scope, val)
2110 if (scope == NULL_TREE)
2111 scope = global_namespace;
2113 if (scope == global_namespace)
2115 b = IDENTIFIER_NAMESPACE_BINDINGS (name);
2116 if (b == NULL_TREE || TREE_CODE (b) != CPLUS_BINDING)
2118 IDENTIFIER_NAMESPACE_BINDINGS (name) = val;
2122 b = binding_for_name (name, scope);
2123 BINDING_VALUE (b) = val;
2126 /* Push into the scope of the NAME namespace. If NAME is NULL_TREE, then we
2127 select a name that is unique to this compilation unit. */
2130 push_namespace (name)
2135 int implicit_use = 0;
2137 if (!global_namespace)
2139 /* This must be ::. */
2140 my_friendly_assert (name == get_identifier ("::"), 377);
2145 /* The name of anonymous namespace is unique for the translation
2147 if (!anonymous_namespace_name)
2148 anonymous_namespace_name = get_file_function_name ('N');
2149 name = anonymous_namespace_name;
2150 d = IDENTIFIER_NAMESPACE_VALUE (name);
2152 /* Reopening anonymous namespace. */
2156 else if (current_namespace == global_namespace
2157 && name == DECL_NAME (std_node))
2164 /* Check whether this is an extended namespace definition. */
2165 d = IDENTIFIER_NAMESPACE_VALUE (name);
2166 if (d != NULL_TREE && TREE_CODE (d) == NAMESPACE_DECL)
2169 if (DECL_NAMESPACE_ALIAS (d))
2171 cp_error ("namespace alias `%D' not allowed here, assuming `%D'",
2172 d, DECL_NAMESPACE_ALIAS (d));
2173 d = DECL_NAMESPACE_ALIAS (d);
2180 /* Make a new namespace, binding the name to it. */
2181 d = build_lang_decl (NAMESPACE_DECL, name, void_type_node);
2182 /* The global namespace is not pushed, and the global binding
2183 level is set elsewhere. */
2188 declare_namespace_level ();
2189 NAMESPACE_LEVEL (d) = current_binding_level;
2193 resume_binding_level (NAMESPACE_LEVEL (d));
2196 do_using_directive (d);
2197 /* Enter the name space. */
2198 current_namespace = d;
2201 /* Pop from the scope of the current namespace. */
2206 if (current_namespace == global_namespace)
2208 my_friendly_assert (in_std>0, 980421);
2212 current_namespace = CP_DECL_CONTEXT (current_namespace);
2213 /* The binding level is not popped, as it might be re-opened later. */
2214 suspend_binding_level ();
2217 /* Push into the scope of the namespace NS, even if it is deeply
2218 nested within another namespace. */
2221 push_nested_namespace (ns)
2224 if (ns == global_namespace)
2225 push_to_top_level ();
2228 push_nested_namespace (CP_DECL_CONTEXT (ns));
2229 push_namespace (DECL_NAME (ns));
2233 /* Pop back from the scope of the namespace NS, which was previously
2234 entered with push_nested_namespace. */
2237 pop_nested_namespace (ns)
2240 while (ns != global_namespace)
2243 ns = CP_DECL_CONTEXT (ns);
2246 pop_from_top_level ();
2250 /* Subroutines for reverting temporarily to top-level for instantiation
2251 of templates and such. We actually need to clear out the class- and
2252 local-value slots of all identifiers, so that only the global values
2253 are at all visible. Simply setting current_binding_level to the global
2254 scope isn't enough, because more binding levels may be pushed. */
2255 struct saved_scope *scope_chain;
2257 /* Mark ST for GC. */
2261 struct stmt_tree *st;
2263 ggc_mark_tree (st->x_last_stmt);
2264 ggc_mark_tree (st->x_last_expr_type);
2267 /* Mark ARG (which is really a struct saved_scope **) for GC. */
2270 mark_saved_scope (arg)
2273 struct saved_scope *t = *(struct saved_scope **)arg;
2276 mark_binding_level (&t->class_bindings);
2277 ggc_mark_tree (t->old_bindings);
2278 ggc_mark_tree (t->old_namespace);
2279 ggc_mark_tree (t->class_name);
2280 ggc_mark_tree (t->class_type);
2281 ggc_mark_tree (t->access_specifier);
2282 ggc_mark_tree (t->function_decl);
2284 ggc_mark_tree_varray (t->lang_base);
2285 ggc_mark_tree (t->lang_name);
2286 ggc_mark_tree (t->x_function_parms);
2287 ggc_mark_tree (t->template_parms);
2288 ggc_mark_tree (t->x_previous_class_type);
2289 ggc_mark_tree (t->x_previous_class_values);
2290 ggc_mark_tree (t->x_saved_tree);
2291 ggc_mark_tree (t->incomplete);
2292 ggc_mark_tree (t->lookups);
2294 mark_stmt_tree (&t->x_stmt_tree);
2295 mark_binding_level (&t->bindings);
2301 store_bindings (names, old_bindings)
2302 tree names, old_bindings;
2305 for (t = names; t; t = TREE_CHAIN (t))
2307 tree binding, t1, id;
2309 if (TREE_CODE (t) == TREE_LIST)
2310 id = TREE_PURPOSE (t);
2315 /* Note that we may have an IDENTIFIER_CLASS_VALUE even when
2316 we have no IDENTIFIER_BINDING if we have left the class
2317 scope, but cached the class-level declarations. */
2318 || !(IDENTIFIER_BINDING (id) || IDENTIFIER_CLASS_VALUE (id)))
2321 for (t1 = old_bindings; t1; t1 = TREE_CHAIN (t1))
2322 if (TREE_VEC_ELT (t1, 0) == id)
2325 binding = make_tree_vec (4);
2329 my_friendly_assert (TREE_CODE (id) == IDENTIFIER_NODE, 135);
2330 TREE_VEC_ELT (binding, 0) = id;
2331 TREE_VEC_ELT (binding, 1) = REAL_IDENTIFIER_TYPE_VALUE (id);
2332 TREE_VEC_ELT (binding, 2) = IDENTIFIER_BINDING (id);
2333 TREE_VEC_ELT (binding, 3) = IDENTIFIER_CLASS_VALUE (id);
2334 IDENTIFIER_BINDING (id) = NULL_TREE;
2335 IDENTIFIER_CLASS_VALUE (id) = NULL_TREE;
2337 TREE_CHAIN (binding) = old_bindings;
2338 old_bindings = binding;
2342 return old_bindings;
2346 maybe_push_to_top_level (pseudo)
2349 struct saved_scope *s;
2350 struct binding_level *b;
2354 s = (struct saved_scope *) xcalloc (1, sizeof (struct saved_scope));
2356 b = scope_chain ? current_binding_level : 0;
2358 /* If we're in the middle of some function, save our state. */
2362 push_function_context_to (NULL_TREE);
2367 old_bindings = NULL_TREE;
2368 if (scope_chain && previous_class_type)
2369 old_bindings = store_bindings (previous_class_values, old_bindings);
2371 /* Have to include global_binding_level, because class-level decls
2372 aren't listed anywhere useful. */
2373 for (; b; b = b->level_chain)
2377 /* Template IDs are inserted into the global level. If they were
2378 inserted into namespace level, finish_file wouldn't find them
2379 when doing pending instantiations. Therefore, don't stop at
2380 namespace level, but continue until :: . */
2381 if (b == global_binding_level || (pseudo && b->pseudo_global))
2384 old_bindings = store_bindings (b->names, old_bindings);
2385 /* We also need to check class_shadowed to save class-level type
2386 bindings, since pushclass doesn't fill in b->names. */
2387 if (b->parm_flag == 2)
2388 old_bindings = store_bindings (b->class_shadowed, old_bindings);
2390 /* Unwind type-value slots back to top level. */
2391 for (t = b->type_shadowed; t; t = TREE_CHAIN (t))
2392 SET_IDENTIFIER_TYPE_VALUE (TREE_PURPOSE (t), TREE_VALUE (t));
2394 s->prev = scope_chain;
2395 s->old_bindings = old_bindings;
2397 s->need_pop_function_context = need_pop;
2398 s->function_decl = current_function_decl;
2401 current_function_decl = NULL_TREE;
2402 VARRAY_TREE_INIT (current_lang_base, 10, "current_lang_base");
2403 current_lang_stack = &VARRAY_TREE (current_lang_base, 0);
2404 current_lang_name = lang_name_cplusplus;
2405 strict_prototype = strict_prototypes_lang_cplusplus;
2406 current_namespace = global_namespace;
2410 push_to_top_level ()
2412 maybe_push_to_top_level (0);
2416 pop_from_top_level ()
2418 struct saved_scope *s = scope_chain;
2421 /* Clear out class-level bindings cache. */
2422 if (previous_class_type)
2423 invalidate_class_lookup_cache ();
2425 VARRAY_FREE (current_lang_base);
2427 scope_chain = s->prev;
2428 for (t = s->old_bindings; t; t = TREE_CHAIN (t))
2430 tree id = TREE_VEC_ELT (t, 0);
2433 SET_IDENTIFIER_TYPE_VALUE (id, TREE_VEC_ELT (t, 1));
2434 IDENTIFIER_BINDING (id) = TREE_VEC_ELT (t, 2);
2435 IDENTIFIER_CLASS_VALUE (id) = TREE_VEC_ELT (t, 3);
2439 if (current_lang_name == lang_name_cplusplus)
2440 strict_prototype = strict_prototypes_lang_cplusplus;
2441 else if (current_lang_name == lang_name_c)
2442 strict_prototype = strict_prototypes_lang_c;
2444 /* If we were in the middle of compiling a function, restore our
2446 if (s->need_pop_function_context)
2447 pop_function_context_from (NULL_TREE);
2448 current_function_decl = s->function_decl;
2453 /* Push a definition of struct, union or enum tag "name".
2454 into binding_level "b". "type" should be the type node,
2455 We assume that the tag "name" is not already defined.
2457 Note that the definition may really be just a forward reference.
2458 In that case, the TYPE_SIZE will be a NULL_TREE.
2460 C++ gratuitously puts all these tags in the name space. */
2462 /* When setting the IDENTIFIER_TYPE_VALUE field of an identifier ID,
2463 record the shadowed value for this binding contour. TYPE is
2464 the type that ID maps to. */
2467 set_identifier_type_value_with_scope (id, type, b)
2470 struct binding_level *b;
2472 if (!b->namespace_p)
2474 /* Shadow the marker, not the real thing, so that the marker
2475 gets restored later. */
2476 tree old_type_value = REAL_IDENTIFIER_TYPE_VALUE (id);
2478 = tree_cons (id, old_type_value, b->type_shadowed);
2482 tree binding = binding_for_name (id, current_namespace);
2483 BINDING_TYPE (binding) = type;
2484 /* Store marker instead of real type. */
2485 type = global_type_node;
2487 SET_IDENTIFIER_TYPE_VALUE (id, type);
2490 /* As set_identifier_type_value_with_scope, but using current_binding_level. */
2493 set_identifier_type_value (id, type)
2497 set_identifier_type_value_with_scope (id, type, current_binding_level);
2500 /* Return the type associated with id. */
2503 identifier_type_value (id)
2506 /* There is no type with that name, anywhere. */
2507 if (REAL_IDENTIFIER_TYPE_VALUE (id) == NULL_TREE)
2509 /* This is not the type marker, but the real thing. */
2510 if (REAL_IDENTIFIER_TYPE_VALUE (id) != global_type_node)
2511 return REAL_IDENTIFIER_TYPE_VALUE (id);
2512 /* Have to search for it. It must be on the global level, now.
2513 Ask lookup_name not to return non-types. */
2514 id = lookup_name_real (id, 2, 1, 0);
2516 return TREE_TYPE (id);
2520 /* Pop off extraneous binding levels left over due to syntax errors.
2522 We don't pop past namespaces, as they might be valid. */
2527 #ifdef DEBUG_CP_BINDING_LEVELS
2528 fprintf (stderr, "XXX entering pop_everything ()\n");
2530 while (!toplevel_bindings_p ())
2532 if (current_binding_level->parm_flag == 2)
2533 pop_nested_class ();
2537 #ifdef DEBUG_CP_BINDING_LEVELS
2538 fprintf (stderr, "XXX leaving pop_everything ()\n");
2542 /* The type TYPE is being declared. If it is a class template, or a
2543 specialization of a class template, do any processing required and
2544 perform error-checking. If IS_FRIEND is non-zero, this TYPE is
2545 being declared a friend. B is the binding level at which this TYPE
2548 Returns the TYPE_DECL for TYPE, which may have been altered by this
2552 maybe_process_template_type_declaration (type, globalize, b)
2555 struct binding_level* b;
2557 tree decl = TYPE_NAME (type);
2559 if (processing_template_parmlist)
2560 /* You can't declare a new template type in a template parameter
2561 list. But, you can declare a non-template type:
2563 template <class A*> struct S;
2565 is a forward-declaration of `A'. */
2569 maybe_check_template_type (type);
2571 my_friendly_assert (IS_AGGR_TYPE (type)
2572 || TREE_CODE (type) == ENUMERAL_TYPE, 0);
2575 if (processing_template_decl)
2577 /* This may change after the call to
2578 push_template_decl_real, but we want the original value. */
2579 tree name = DECL_NAME (decl);
2581 decl = push_template_decl_real (decl, globalize);
2582 /* If the current binding level is the binding level for the
2583 template parameters (see the comment in
2584 begin_template_parm_list) and the enclosing level is a class
2585 scope, and we're not looking at a friend, push the
2586 declaration of the member class into the class scope. In the
2587 friend case, push_template_decl will already have put the
2588 friend into global scope, if appropriate. */
2589 if (TREE_CODE (type) != ENUMERAL_TYPE
2590 && !globalize && b->pseudo_global
2591 && b->level_chain->parm_flag == 2)
2593 finish_member_declaration (CLASSTYPE_TI_TEMPLATE (type));
2594 /* Put this tag on the list of tags for the class, since
2595 that won't happen below because B is not the class
2596 binding level, but is instead the pseudo-global level. */
2597 b->level_chain->tags =
2598 tree_cons (name, type, b->level_chain->tags);
2599 if (TYPE_SIZE (current_class_type) == NULL_TREE)
2600 CLASSTYPE_TAGS (current_class_type) = b->level_chain->tags;
2608 /* In C++, you don't have to write `struct S' to refer to `S'; you
2609 can just use `S'. We accomplish this by creating a TYPE_DECL as
2610 if the user had written `typedef struct S S'. Create and return
2611 the TYPE_DECL for TYPE. */
2614 create_implicit_typedef (name, type)
2620 decl = build_decl (TYPE_DECL, name, type);
2621 SET_DECL_ARTIFICIAL (decl);
2622 /* There are other implicit type declarations, like the one *within*
2623 a class that allows you to write `S::S'. We must distinguish
2625 SET_DECL_IMPLICIT_TYPEDEF_P (decl);
2626 TYPE_NAME (type) = decl;
2631 /* Push a tag name NAME for struct/class/union/enum type TYPE.
2632 Normally put it into the inner-most non-tag-transparent scope,
2633 but if GLOBALIZE is true, put it in the inner-most non-class scope.
2634 The latter is needed for implicit declarations. */
2637 pushtag (name, type, globalize)
2641 register struct binding_level *b;
2643 b = current_binding_level;
2644 while (b->tag_transparent
2645 || (globalize && b->parm_flag == 2))
2648 b->tags = tree_cons (name, type, b->tags);
2652 /* Do C++ gratuitous typedefing. */
2653 if (IDENTIFIER_TYPE_VALUE (name) != type)
2655 register tree d = NULL_TREE;
2657 tree context = TYPE_CONTEXT (type);
2661 tree cs = current_scope ();
2665 else if (cs != NULL_TREE
2666 && TREE_CODE_CLASS (TREE_CODE (cs)) == 't')
2667 /* When declaring a friend class of a local class, we want
2668 to inject the newly named class into the scope
2669 containing the local class, not the namespace scope. */
2670 context = decl_function_context (get_type_decl (cs));
2673 context = current_namespace;
2675 if ((b->pseudo_global && b->level_chain->parm_flag == 2)
2676 || b->parm_flag == 2)
2679 if (current_lang_name == lang_name_java)
2680 TYPE_FOR_JAVA (type) = 1;
2682 d = create_implicit_typedef (name, type);
2683 DECL_CONTEXT (d) = FROB_CONTEXT (context);
2685 set_identifier_type_value_with_scope (name, type, b);
2687 d = maybe_process_template_type_declaration (type,
2690 if (b->parm_flag == 2)
2692 if (!PROCESSING_REAL_TEMPLATE_DECL_P ())
2693 /* Put this TYPE_DECL on the TYPE_FIELDS list for the
2694 class. But if it's a member template class, we
2695 want the TEMPLATE_DECL, not the TYPE_DECL, so this
2697 finish_member_declaration (d);
2699 pushdecl_class_level (d);
2702 d = pushdecl_with_scope (d, b);
2704 if (ANON_AGGRNAME_P (name))
2705 DECL_IGNORED_P (d) = 1;
2707 TYPE_CONTEXT (type) = DECL_CONTEXT (d);
2708 DECL_ASSEMBLER_NAME (d) = DECL_NAME (d);
2709 if (!uses_template_parms (type))
2710 DECL_ASSEMBLER_NAME (d)
2711 = get_identifier (build_overload_name (type, 1, 1));
2713 if (b->parm_flag == 2)
2715 if (TYPE_SIZE (current_class_type) == NULL_TREE)
2716 CLASSTYPE_TAGS (current_class_type) = b->tags;
2720 if (TREE_CODE (TYPE_NAME (type)) == TYPE_DECL)
2721 /* Use the canonical TYPE_DECL for this node. */
2722 TYPE_STUB_DECL (type) = TYPE_NAME (type);
2725 /* Create a fake NULL-named TYPE_DECL node whose TREE_TYPE
2726 will be the tagged type we just added to the current
2727 binding level. This fake NULL-named TYPE_DECL node helps
2728 dwarfout.c to know when it needs to output a
2729 representation of a tagged type, and it also gives us a
2730 convenient place to record the "scope start" address for
2733 tree d = build_decl (TYPE_DECL, NULL_TREE, type);
2734 TYPE_STUB_DECL (type) = pushdecl_with_scope (d, b);
2738 /* Counter used to create anonymous type names. */
2740 static int anon_cnt = 0;
2742 /* Return an IDENTIFIER which can be used as a name for
2743 anonymous structs and unions. */
2750 sprintf (buf, ANON_AGGRNAME_FORMAT, anon_cnt++);
2751 return get_identifier (buf);
2754 /* Clear the TREE_PURPOSE slot of tags which have anonymous typenames.
2755 This keeps dbxout from getting confused. */
2760 register struct binding_level *b;
2762 static int last_cnt = 0;
2764 /* Fast out if no new anon names were declared. */
2765 if (last_cnt == anon_cnt)
2768 b = current_binding_level;
2769 while (b->tag_transparent)
2774 /* A NULL purpose means we have already processed all tags
2775 from here to the end of the list. */
2776 if (TREE_PURPOSE (tags) == NULL_TREE)
2778 if (ANON_AGGRNAME_P (TREE_PURPOSE (tags)))
2779 TREE_PURPOSE (tags) = NULL_TREE;
2780 tags = TREE_CHAIN (tags);
2782 last_cnt = anon_cnt;
2785 /* Subroutine of duplicate_decls: return truthvalue of whether
2786 or not types of these decls match.
2788 For C++, we must compare the parameter list so that `int' can match
2789 `int&' in a parameter position, but `int&' is not confused with
2793 decls_match (newdecl, olddecl)
2794 tree newdecl, olddecl;
2798 if (newdecl == olddecl)
2801 if (TREE_CODE (newdecl) != TREE_CODE (olddecl))
2802 /* If the two DECLs are not even the same kind of thing, we're not
2803 interested in their types. */
2806 if (TREE_CODE (newdecl) == FUNCTION_DECL)
2808 tree f1 = TREE_TYPE (newdecl);
2809 tree f2 = TREE_TYPE (olddecl);
2810 tree p1 = TYPE_ARG_TYPES (f1);
2811 tree p2 = TYPE_ARG_TYPES (f2);
2813 if (CP_DECL_CONTEXT (newdecl) != CP_DECL_CONTEXT (olddecl)
2814 && ! (DECL_LANGUAGE (newdecl) == lang_c
2815 && DECL_LANGUAGE (olddecl) == lang_c))
2818 if (TREE_CODE (f1) != TREE_CODE (f2))
2821 if (same_type_p (TREE_TYPE (f1), TREE_TYPE (f2)))
2823 if (! strict_prototypes_lang_c && DECL_LANGUAGE (olddecl) == lang_c
2826 types_match = self_promoting_args_p (p1);
2827 if (p1 == void_list_node)
2828 TREE_TYPE (newdecl) = TREE_TYPE (olddecl);
2830 else if (!strict_prototypes_lang_c && DECL_LANGUAGE (olddecl)==lang_c
2831 && DECL_LANGUAGE (newdecl) == lang_c && p1 == NULL_TREE)
2833 types_match = self_promoting_args_p (p2);
2834 TREE_TYPE (newdecl) = TREE_TYPE (olddecl);
2837 types_match = compparms (p1, p2);
2842 else if (TREE_CODE (newdecl) == TEMPLATE_DECL)
2844 if (!comp_template_parms (DECL_TEMPLATE_PARMS (newdecl),
2845 DECL_TEMPLATE_PARMS (olddecl)))
2848 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == TYPE_DECL)
2851 types_match = decls_match (DECL_TEMPLATE_RESULT (olddecl),
2852 DECL_TEMPLATE_RESULT (newdecl));
2856 if (TREE_TYPE (newdecl) == error_mark_node)
2857 types_match = TREE_TYPE (olddecl) == error_mark_node;
2858 else if (TREE_TYPE (olddecl) == NULL_TREE)
2859 types_match = TREE_TYPE (newdecl) == NULL_TREE;
2860 else if (TREE_TYPE (newdecl) == NULL_TREE)
2863 types_match = comptypes (TREE_TYPE (newdecl),
2864 TREE_TYPE (olddecl),
2865 COMPARE_REDECLARATION);
2871 /* If NEWDECL is `static' and an `extern' was seen previously,
2872 warn about it. OLDDECL is the previous declaration.
2874 Note that this does not apply to the C++ case of declaring
2875 a variable `extern const' and then later `const'.
2877 Don't complain about built-in functions, since they are beyond
2878 the user's control. */
2881 warn_extern_redeclared_static (newdecl, olddecl)
2882 tree newdecl, olddecl;
2884 static const char *explicit_extern_static_warning
2885 = "`%D' was declared `extern' and later `static'";
2886 static const char *implicit_extern_static_warning
2887 = "`%D' was declared implicitly `extern' and later `static'";
2891 if (TREE_CODE (newdecl) == TYPE_DECL
2892 || TREE_CODE (newdecl) == TEMPLATE_DECL)
2895 /* Don't get confused by static member functions; that's a different
2897 if (TREE_CODE (newdecl) == FUNCTION_DECL
2898 && DECL_STATIC_FUNCTION_P (newdecl))
2901 /* If the old declaration was `static', or the new one isn't, then
2902 then everything is OK. */
2903 if (DECL_THIS_STATIC (olddecl) || !DECL_THIS_STATIC (newdecl))
2906 /* It's OK to declare a builtin function as `static'. */
2907 if (TREE_CODE (olddecl) == FUNCTION_DECL
2908 && DECL_ARTIFICIAL (olddecl))
2911 name = DECL_ASSEMBLER_NAME (newdecl);
2912 cp_pedwarn (IDENTIFIER_IMPLICIT_DECL (name)
2913 ? implicit_extern_static_warning
2914 : explicit_extern_static_warning, newdecl);
2915 cp_pedwarn_at ("previous declaration of `%D'", olddecl);
2918 /* Handle when a new declaration NEWDECL has the same name as an old
2919 one OLDDECL in the same binding contour. Prints an error message
2922 If safely possible, alter OLDDECL to look like NEWDECL, and return 1.
2923 Otherwise, return 0. */
2926 duplicate_decls (newdecl, olddecl)
2927 tree newdecl, olddecl;
2929 unsigned olddecl_uid = DECL_UID (olddecl);
2930 int olddecl_friend = 0, types_match = 0;
2931 int new_defines_function = 0;
2933 if (newdecl == olddecl)
2936 types_match = decls_match (newdecl, olddecl);
2938 /* If either the type of the new decl or the type of the old decl is an
2939 error_mark_node, then that implies that we have already issued an
2940 error (earlier) for some bogus type specification, and in that case,
2941 it is rather pointless to harass the user with yet more error message
2942 about the same declaration, so just pretend the types match here. */
2943 if (TREE_TYPE (newdecl) == error_mark_node
2944 || TREE_TYPE (olddecl) == error_mark_node)
2947 /* Check for redeclaration and other discrepancies. */
2948 if (TREE_CODE (olddecl) == FUNCTION_DECL
2949 && DECL_ARTIFICIAL (olddecl))
2951 if (TREE_CODE (newdecl) != FUNCTION_DECL)
2953 /* If you declare a built-in or predefined function name as static,
2954 the old definition is overridden, but optionally warn this was a
2955 bad choice of name. */
2956 if (! TREE_PUBLIC (newdecl))
2959 cp_warning ("shadowing %s function `%#D'",
2960 DECL_BUILT_IN (olddecl) ? "built-in" : "library",
2962 /* Discard the old built-in function. */
2965 /* If the built-in is not ansi, then programs can override
2966 it even globally without an error. */
2967 else if (! DECL_BUILT_IN (olddecl))
2968 cp_warning ("library function `%#D' redeclared as non-function `%#D'",
2972 cp_error ("declaration of `%#D'", newdecl);
2973 cp_error ("conflicts with built-in declaration `%#D'",
2978 else if (!types_match)
2980 if ((DECL_LANGUAGE (newdecl) == lang_c
2981 && DECL_LANGUAGE (olddecl) == lang_c)
2982 || compparms (TYPE_ARG_TYPES (TREE_TYPE (newdecl)),
2983 TYPE_ARG_TYPES (TREE_TYPE (olddecl))))
2985 /* A near match; override the builtin. */
2987 if (TREE_PUBLIC (newdecl))
2989 cp_warning ("new declaration `%#D'", newdecl);
2990 cp_warning ("ambiguates built-in declaration `%#D'",
2993 else if (warn_shadow)
2994 cp_warning ("shadowing %s function `%#D'",
2995 DECL_BUILT_IN (olddecl) ? "built-in" : "library",
2999 /* Discard the old built-in function. */
3003 if (DECL_THIS_STATIC (newdecl) && !DECL_THIS_STATIC (olddecl))
3005 /* If a builtin function is redeclared as `static', merge
3006 the declarations, but make the original one static. */
3007 DECL_THIS_STATIC (olddecl) = 1;
3008 TREE_PUBLIC (olddecl) = 0;
3010 /* Make the olddeclaration consistent with the new one so that
3011 all remnants of the builtin-ness of this function will be
3013 DECL_LANGUAGE (olddecl) = DECL_LANGUAGE (newdecl);
3014 DECL_RTL (olddecl) = DECL_RTL (newdecl);
3015 DECL_ASSEMBLER_NAME (olddecl) = DECL_ASSEMBLER_NAME (newdecl);
3016 SET_IDENTIFIER_GLOBAL_VALUE (DECL_ASSEMBLER_NAME (newdecl),
3020 else if (TREE_CODE (olddecl) != TREE_CODE (newdecl))
3022 if ((TREE_CODE (olddecl) == TYPE_DECL && DECL_ARTIFICIAL (olddecl)
3023 && TREE_CODE (newdecl) != TYPE_DECL
3024 && ! (TREE_CODE (newdecl) == TEMPLATE_DECL
3025 && TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == TYPE_DECL))
3026 || (TREE_CODE (newdecl) == TYPE_DECL && DECL_ARTIFICIAL (newdecl)
3027 && TREE_CODE (olddecl) != TYPE_DECL
3028 && ! (TREE_CODE (olddecl) == TEMPLATE_DECL
3029 && (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl))
3032 /* We do nothing special here, because C++ does such nasty
3033 things with TYPE_DECLs. Instead, just let the TYPE_DECL
3034 get shadowed, and know that if we need to find a TYPE_DECL
3035 for a given name, we can look in the IDENTIFIER_TYPE_VALUE
3036 slot of the identifier. */
3040 if ((TREE_CODE (newdecl) == FUNCTION_DECL
3041 && DECL_FUNCTION_TEMPLATE_P (olddecl))
3042 || (TREE_CODE (olddecl) == FUNCTION_DECL
3043 && DECL_FUNCTION_TEMPLATE_P (newdecl)))
3046 cp_error ("`%#D' redeclared as different kind of symbol", newdecl);
3047 if (TREE_CODE (olddecl) == TREE_LIST)
3048 olddecl = TREE_VALUE (olddecl);
3049 cp_error_at ("previous declaration of `%#D'", olddecl);
3051 /* New decl is completely inconsistent with the old one =>
3052 tell caller to replace the old one. */
3056 else if (!types_match)
3058 if (CP_DECL_CONTEXT (newdecl) != CP_DECL_CONTEXT (olddecl))
3059 /* These are certainly not duplicate declarations; they're
3060 from different scopes. */
3063 if (TREE_CODE (newdecl) == TEMPLATE_DECL)
3065 /* The name of a class template may not be declared to refer to
3066 any other template, class, function, object, namespace, value,
3067 or type in the same scope. */
3068 if (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl)) == TYPE_DECL
3069 || TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == TYPE_DECL)
3071 cp_error ("declaration of template `%#D'", newdecl);
3072 cp_error_at ("conflicts with previous declaration `%#D'",
3075 else if (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl)) == FUNCTION_DECL
3076 && TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == FUNCTION_DECL
3077 && compparms (TYPE_ARG_TYPES (TREE_TYPE (DECL_TEMPLATE_RESULT (olddecl))),
3078 TYPE_ARG_TYPES (TREE_TYPE (DECL_TEMPLATE_RESULT (newdecl))))
3079 && comp_template_parms (DECL_TEMPLATE_PARMS (newdecl),
3080 DECL_TEMPLATE_PARMS (olddecl)))
3082 cp_error ("new declaration `%#D'", newdecl);
3083 cp_error_at ("ambiguates old declaration `%#D'", olddecl);
3087 if (TREE_CODE (newdecl) == FUNCTION_DECL)
3089 if (DECL_LANGUAGE (newdecl) == lang_c
3090 && DECL_LANGUAGE (olddecl) == lang_c)
3092 cp_error ("declaration of C function `%#D' conflicts with",
3094 cp_error_at ("previous declaration `%#D' here", olddecl);
3096 else if (compparms (TYPE_ARG_TYPES (TREE_TYPE (newdecl)),
3097 TYPE_ARG_TYPES (TREE_TYPE (olddecl))))
3099 cp_error ("new declaration `%#D'", newdecl);
3100 cp_error_at ("ambiguates old declaration `%#D'", olddecl);
3106 /* Already complained about this, so don't do so again. */
3107 else if (current_class_type == NULL_TREE
3108 || IDENTIFIER_ERROR_LOCUS (DECL_ASSEMBLER_NAME (newdecl)) != current_class_type)
3110 cp_error ("conflicting types for `%#D'", newdecl);
3111 cp_error_at ("previous declaration as `%#D'", olddecl);
3114 else if (TREE_CODE (newdecl) == FUNCTION_DECL
3115 && ((DECL_TEMPLATE_SPECIALIZATION (olddecl)
3116 && (!DECL_TEMPLATE_INFO (newdecl)
3117 || (DECL_TI_TEMPLATE (newdecl)
3118 != DECL_TI_TEMPLATE (olddecl))))
3119 || (DECL_TEMPLATE_SPECIALIZATION (newdecl)
3120 && (!DECL_TEMPLATE_INFO (olddecl)
3121 || (DECL_TI_TEMPLATE (olddecl)
3122 != DECL_TI_TEMPLATE (newdecl))))))
3123 /* It's OK to have a template specialization and a non-template
3124 with the same type, or to have specializations of two
3125 different templates with the same type. Note that if one is a
3126 specialization, and the other is an instantiation of the same
3127 template, that we do not exit at this point. That situation
3128 can occur if we instantiate a template class, and then
3129 specialize one of its methods. This situation is legal, but
3130 the declarations must be merged in the usual way. */
3132 else if (TREE_CODE (newdecl) == FUNCTION_DECL
3133 && ((DECL_TEMPLATE_INSTANTIATION (olddecl)
3134 && !DECL_USE_TEMPLATE (newdecl))
3135 || (DECL_TEMPLATE_INSTANTIATION (newdecl)
3136 && !DECL_USE_TEMPLATE (olddecl))))
3137 /* One of the declarations is a template instantiation, and the
3138 other is not a template at all. That's OK. */
3140 else if (TREE_CODE (newdecl) == NAMESPACE_DECL
3141 && DECL_NAMESPACE_ALIAS (newdecl)
3142 && DECL_NAMESPACE_ALIAS (newdecl) == DECL_NAMESPACE_ALIAS (olddecl))
3143 /* Redeclaration of namespace alias, ignore it. */
3147 const char *errmsg = redeclaration_error_message (newdecl, olddecl);
3150 cp_error (errmsg, newdecl);
3151 if (DECL_NAME (olddecl) != NULL_TREE)
3152 cp_error_at ((DECL_INITIAL (olddecl)
3153 && namespace_bindings_p ())
3154 ? "`%#D' previously defined here"
3155 : "`%#D' previously declared here", olddecl);
3157 else if (TREE_CODE (olddecl) == FUNCTION_DECL
3158 && DECL_INITIAL (olddecl) != NULL_TREE
3159 && TYPE_ARG_TYPES (TREE_TYPE (olddecl)) == NULL_TREE
3160 && TYPE_ARG_TYPES (TREE_TYPE (newdecl)) != NULL_TREE)
3162 /* Prototype decl follows defn w/o prototype. */
3163 cp_warning_at ("prototype for `%#D'", newdecl);
3164 cp_warning_at ("follows non-prototype definition here", olddecl);
3166 else if (TREE_CODE (olddecl) == FUNCTION_DECL
3167 && DECL_LANGUAGE (newdecl) != DECL_LANGUAGE (olddecl))
3169 /* extern "C" int foo ();
3170 int foo () { bar (); }
3172 if (current_lang_stack
3173 == &VARRAY_TREE (current_lang_base, 0))
3174 DECL_LANGUAGE (newdecl) = DECL_LANGUAGE (olddecl);
3177 cp_error_at ("previous declaration of `%#D' with %L linkage",
3178 olddecl, DECL_LANGUAGE (olddecl));
3179 cp_error ("conflicts with new declaration with %L linkage",
3180 DECL_LANGUAGE (newdecl));
3184 if (DECL_LANG_SPECIFIC (olddecl) && DECL_USE_TEMPLATE (olddecl))
3186 else if (TREE_CODE (olddecl) == FUNCTION_DECL)
3188 tree t1 = TYPE_ARG_TYPES (TREE_TYPE (olddecl));
3189 tree t2 = TYPE_ARG_TYPES (TREE_TYPE (newdecl));
3192 if (TREE_CODE (TREE_TYPE (newdecl)) == METHOD_TYPE)
3193 t1 = TREE_CHAIN (t1), t2 = TREE_CHAIN (t2);
3195 for (; t1 && t1 != void_list_node;
3196 t1 = TREE_CHAIN (t1), t2 = TREE_CHAIN (t2), i++)
3197 if (TREE_PURPOSE (t1) && TREE_PURPOSE (t2))
3199 if (1 == simple_cst_equal (TREE_PURPOSE (t1),
3204 cp_pedwarn ("default argument given for parameter %d of `%#D'",
3206 cp_pedwarn_at ("after previous specification in `%#D'",
3212 cp_error ("default argument given for parameter %d of `%#D'",
3214 cp_error_at ("after previous specification in `%#D'",
3219 if (DECL_THIS_INLINE (newdecl) && ! DECL_THIS_INLINE (olddecl)
3220 && TREE_ADDRESSABLE (olddecl) && warn_inline)
3222 cp_warning ("`%#D' was used before it was declared inline",
3224 cp_warning_at ("previous non-inline declaration here",
3230 /* If new decl is `static' and an `extern' was seen previously,
3232 warn_extern_redeclared_static (newdecl, olddecl);
3234 /* We have committed to returning 1 at this point. */
3235 if (TREE_CODE (newdecl) == FUNCTION_DECL)
3237 /* Now that functions must hold information normally held
3238 by field decls, there is extra work to do so that
3239 declaration information does not get destroyed during
3241 if (DECL_VINDEX (olddecl))
3242 DECL_VINDEX (newdecl) = DECL_VINDEX (olddecl);
3243 if (DECL_VIRTUAL_CONTEXT (olddecl))
3244 DECL_VIRTUAL_CONTEXT (newdecl) = DECL_VIRTUAL_CONTEXT (olddecl);
3245 if (DECL_CONTEXT (olddecl))
3246 DECL_CONTEXT (newdecl) = DECL_CONTEXT (olddecl);
3247 if (DECL_PENDING_INLINE_INFO (newdecl) == (struct pending_inline *)0)
3248 DECL_PENDING_INLINE_INFO (newdecl) = DECL_PENDING_INLINE_INFO (olddecl);
3249 DECL_STATIC_CONSTRUCTOR (newdecl) |= DECL_STATIC_CONSTRUCTOR (olddecl);
3250 DECL_STATIC_DESTRUCTOR (newdecl) |= DECL_STATIC_DESTRUCTOR (olddecl);
3251 DECL_PURE_VIRTUAL_P (newdecl) |= DECL_PURE_VIRTUAL_P (olddecl);
3252 DECL_VIRTUAL_P (newdecl) |= DECL_VIRTUAL_P (olddecl);
3253 DECL_NEEDS_FINAL_OVERRIDER_P (newdecl) |= DECL_NEEDS_FINAL_OVERRIDER_P (olddecl);
3254 DECL_THIS_STATIC (newdecl) |= DECL_THIS_STATIC (olddecl);
3255 new_defines_function = DECL_INITIAL (newdecl) != NULL_TREE;
3257 /* Optionally warn about more than one declaration for the same
3258 name, but don't warn about a function declaration followed by a
3260 if (warn_redundant_decls && ! DECL_ARTIFICIAL (olddecl)
3261 && !(new_defines_function && DECL_INITIAL (olddecl) == NULL_TREE)
3262 /* Don't warn about extern decl followed by definition. */
3263 && !(DECL_EXTERNAL (olddecl) && ! DECL_EXTERNAL (newdecl))
3264 /* Don't warn about friends, let add_friend take care of it. */
3265 && ! DECL_FRIEND_P (newdecl))
3267 cp_warning ("redundant redeclaration of `%D' in same scope", newdecl);
3268 cp_warning_at ("previous declaration of `%D'", olddecl);
3272 /* Deal with C++: must preserve virtual function table size. */
3273 if (TREE_CODE (olddecl) == TYPE_DECL)
3275 register tree newtype = TREE_TYPE (newdecl);
3276 register tree oldtype = TREE_TYPE (olddecl);
3278 if (newtype != error_mark_node && oldtype != error_mark_node
3279 && TYPE_LANG_SPECIFIC (newtype) && TYPE_LANG_SPECIFIC (oldtype))
3281 CLASSTYPE_VSIZE (newtype) = CLASSTYPE_VSIZE (oldtype);
3282 CLASSTYPE_FRIEND_CLASSES (newtype)
3283 = CLASSTYPE_FRIEND_CLASSES (oldtype);
3287 /* Copy all the DECL_... slots specified in the new decl
3288 except for any that we copy here from the old type. */
3289 DECL_MACHINE_ATTRIBUTES (newdecl)
3290 = merge_machine_decl_attributes (olddecl, newdecl);
3292 if (TREE_CODE (newdecl) == TEMPLATE_DECL)
3294 if (! duplicate_decls (DECL_TEMPLATE_RESULT (newdecl),
3295 DECL_TEMPLATE_RESULT (olddecl)))
3296 cp_error ("invalid redeclaration of %D", newdecl);
3297 TREE_TYPE (olddecl) = TREE_TYPE (DECL_TEMPLATE_RESULT (olddecl));
3298 DECL_TEMPLATE_SPECIALIZATIONS (olddecl)
3299 = chainon (DECL_TEMPLATE_SPECIALIZATIONS (olddecl),
3300 DECL_TEMPLATE_SPECIALIZATIONS (newdecl));
3307 /* Automatically handles default parameters. */
3308 tree oldtype = TREE_TYPE (olddecl);
3311 /* Merge the data types specified in the two decls. */
3312 newtype = common_type (TREE_TYPE (newdecl), TREE_TYPE (olddecl));
3314 if (TREE_CODE (newdecl) == VAR_DECL)
3315 DECL_THIS_EXTERN (newdecl) |= DECL_THIS_EXTERN (olddecl);
3316 /* Do this after calling `common_type' so that default
3317 parameters don't confuse us. */
3318 else if (TREE_CODE (newdecl) == FUNCTION_DECL
3319 && (TYPE_RAISES_EXCEPTIONS (TREE_TYPE (newdecl))
3320 != TYPE_RAISES_EXCEPTIONS (TREE_TYPE (olddecl))))
3322 TREE_TYPE (newdecl) = build_exception_variant (newtype,
3323 TYPE_RAISES_EXCEPTIONS (TREE_TYPE (newdecl)));
3324 TREE_TYPE (olddecl) = build_exception_variant (newtype,
3325 TYPE_RAISES_EXCEPTIONS (oldtype));
3327 if ((pedantic || ! DECL_IN_SYSTEM_HEADER (olddecl))
3328 && DECL_SOURCE_LINE (olddecl) != 0
3330 && !comp_except_specs (TYPE_RAISES_EXCEPTIONS (TREE_TYPE (newdecl)),
3331 TYPE_RAISES_EXCEPTIONS (TREE_TYPE (olddecl)), 1))
3333 cp_error ("declaration of `%F' throws different exceptions",
3335 cp_error_at ("than previous declaration `%F'", olddecl);
3338 TREE_TYPE (newdecl) = TREE_TYPE (olddecl) = newtype;
3340 /* Lay the type out, unless already done. */
3341 if (! same_type_p (newtype, oldtype)
3342 && TREE_TYPE (newdecl) != error_mark_node
3343 && !(processing_template_decl && uses_template_parms (newdecl)))
3344 layout_type (TREE_TYPE (newdecl));
3346 if ((TREE_CODE (newdecl) == VAR_DECL
3347 || TREE_CODE (newdecl) == PARM_DECL
3348 || TREE_CODE (newdecl) == RESULT_DECL
3349 || TREE_CODE (newdecl) == FIELD_DECL
3350 || TREE_CODE (newdecl) == TYPE_DECL)
3351 && !(processing_template_decl && uses_template_parms (newdecl)))
3352 layout_decl (newdecl, 0);
3354 /* Merge the type qualifiers. */
3355 if (TREE_READONLY (newdecl))
3356 TREE_READONLY (olddecl) = 1;
3357 if (TREE_THIS_VOLATILE (newdecl))
3358 TREE_THIS_VOLATILE (olddecl) = 1;
3360 /* Merge the initialization information. */
3361 if (DECL_INITIAL (newdecl) == NULL_TREE
3362 && DECL_INITIAL (olddecl) != NULL_TREE)
3364 DECL_INITIAL (newdecl) = DECL_INITIAL (olddecl);
3365 DECL_SOURCE_FILE (newdecl) = DECL_SOURCE_FILE (olddecl);
3366 DECL_SOURCE_LINE (newdecl) = DECL_SOURCE_LINE (olddecl);
3367 if (CAN_HAVE_FULL_LANG_DECL_P (newdecl)
3368 && DECL_LANG_SPECIFIC (newdecl)
3369 && DECL_LANG_SPECIFIC (olddecl))
3370 DECL_SAVED_TREE (newdecl) = DECL_SAVED_TREE (olddecl);
3373 /* Merge the section attribute.
3374 We want to issue an error if the sections conflict but that must be
3375 done later in decl_attributes since we are called before attributes
3377 if (DECL_SECTION_NAME (newdecl) == NULL_TREE)
3378 DECL_SECTION_NAME (newdecl) = DECL_SECTION_NAME (olddecl);
3380 /* Keep the old rtl since we can safely use it. */
3381 DECL_RTL (newdecl) = DECL_RTL (olddecl);
3383 if (TREE_CODE (newdecl) == FUNCTION_DECL)
3385 DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (newdecl)
3386 |= DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (olddecl);
3387 DECL_NO_CHECK_MEMORY_USAGE (newdecl)
3388 |= DECL_NO_CHECK_MEMORY_USAGE (olddecl);
3389 DECL_NO_LIMIT_STACK (newdecl)
3390 |= DECL_NO_LIMIT_STACK (olddecl);
3393 /* If cannot merge, then use the new type and qualifiers,
3394 and don't preserve the old rtl. */
3397 /* Clean out any memory we had of the old declaration. */
3398 tree oldstatic = value_member (olddecl, static_aggregates);
3400 TREE_VALUE (oldstatic) = error_mark_node;
3402 TREE_TYPE (olddecl) = TREE_TYPE (newdecl);
3403 TREE_READONLY (olddecl) = TREE_READONLY (newdecl);
3404 TREE_THIS_VOLATILE (olddecl) = TREE_THIS_VOLATILE (newdecl);
3405 TREE_SIDE_EFFECTS (olddecl) = TREE_SIDE_EFFECTS (newdecl);
3408 /* Merge the storage class information. */
3409 DECL_WEAK (newdecl) |= DECL_WEAK (olddecl);
3410 DECL_ONE_ONLY (newdecl) |= DECL_ONE_ONLY (olddecl);
3411 DECL_DEFER_OUTPUT (newdecl) |= DECL_DEFER_OUTPUT (olddecl);
3412 TREE_PUBLIC (newdecl) = TREE_PUBLIC (olddecl);
3413 TREE_STATIC (olddecl) = TREE_STATIC (newdecl) |= TREE_STATIC (olddecl);
3414 if (! DECL_EXTERNAL (olddecl))
3415 DECL_EXTERNAL (newdecl) = 0;
3417 if (DECL_LANG_SPECIFIC (newdecl) && DECL_LANG_SPECIFIC (olddecl))
3419 DECL_INTERFACE_KNOWN (newdecl) |= DECL_INTERFACE_KNOWN (olddecl);
3420 DECL_NOT_REALLY_EXTERN (newdecl) |= DECL_NOT_REALLY_EXTERN (olddecl);
3421 DECL_COMDAT (newdecl) |= DECL_COMDAT (olddecl);
3422 DECL_TEMPLATE_INSTANTIATED (newdecl)
3423 |= DECL_TEMPLATE_INSTANTIATED (olddecl);
3424 /* Don't really know how much of the language-specific
3425 values we should copy from old to new. */
3426 DECL_IN_AGGR_P (newdecl) = DECL_IN_AGGR_P (olddecl);
3427 DECL_ACCESS (newdecl) = DECL_ACCESS (olddecl);
3428 DECL_NONCONVERTING_P (newdecl) = DECL_NONCONVERTING_P (olddecl);
3429 DECL_TEMPLATE_INFO (newdecl) = DECL_TEMPLATE_INFO (olddecl);
3430 olddecl_friend = DECL_FRIEND_P (olddecl);
3432 /* Only functions have DECL_BEFRIENDING_CLASSES. */
3433 if (TREE_CODE (newdecl) == FUNCTION_DECL
3434 || DECL_FUNCTION_TEMPLATE_P (newdecl))
3435 DECL_BEFRIENDING_CLASSES (newdecl)
3436 = chainon (DECL_BEFRIENDING_CLASSES (newdecl),
3437 DECL_BEFRIENDING_CLASSES (olddecl));
3440 if (TREE_CODE (newdecl) == FUNCTION_DECL)
3442 if (DECL_TEMPLATE_INSTANTIATION (olddecl)
3443 && !DECL_TEMPLATE_INSTANTIATION (newdecl))
3445 /* If newdecl is not a specialization, then it is not a
3446 template-related function at all. And that means that we
3447 shoud have exited above, returning 0. */
3448 my_friendly_assert (DECL_TEMPLATE_SPECIALIZATION (newdecl),
3451 if (TREE_USED (olddecl))
3452 /* From [temp.expl.spec]:
3454 If a template, a member template or the member of a class
3455 template is explicitly specialized then that
3456 specialization shall be declared before the first use of
3457 that specialization that would cause an implicit
3458 instantiation to take place, in every translation unit in
3459 which such a use occurs. */
3460 cp_error ("explicit specialization of %D after first use",
3463 SET_DECL_TEMPLATE_SPECIALIZATION (olddecl);
3465 DECL_THIS_INLINE (newdecl) |= DECL_THIS_INLINE (olddecl);
3467 /* If either decl says `inline', this fn is inline, unless its
3468 definition was passed already. */
3469 if (DECL_INLINE (newdecl) && DECL_INITIAL (olddecl) == NULL_TREE)
3470 DECL_INLINE (olddecl) = 1;
3471 DECL_INLINE (newdecl) = DECL_INLINE (olddecl);
3475 DECL_LANGUAGE (olddecl) = DECL_LANGUAGE (newdecl);
3476 DECL_ASSEMBLER_NAME (olddecl) = DECL_ASSEMBLER_NAME (newdecl);
3477 DECL_RTL (olddecl) = DECL_RTL (newdecl);
3479 if (! types_match || new_defines_function)
3481 /* These need to be copied so that the names are available.
3482 Note that if the types do match, we'll preserve inline
3483 info and other bits, but if not, we won't. */
3484 DECL_ARGUMENTS (olddecl) = DECL_ARGUMENTS (newdecl);
3485 DECL_RESULT (olddecl) = DECL_RESULT (newdecl);
3487 if (new_defines_function)
3488 /* If defining a function declared with other language
3489 linkage, use the previously declared language linkage. */
3490 DECL_LANGUAGE (newdecl) = DECL_LANGUAGE (olddecl);
3491 else if (types_match)
3493 /* If redeclaring a builtin function, and not a definition,
3494 it stays built in. */
3495 if (DECL_BUILT_IN (olddecl))
3497 DECL_BUILT_IN_CLASS (newdecl) = DECL_BUILT_IN_CLASS (olddecl);
3498 DECL_FUNCTION_CODE (newdecl) = DECL_FUNCTION_CODE (olddecl);
3499 /* If we're keeping the built-in definition, keep the rtl,
3500 regardless of declaration matches. */
3501 DECL_RTL (newdecl) = DECL_RTL (olddecl);
3504 DECL_FRAME_SIZE (newdecl) = DECL_FRAME_SIZE (olddecl);
3506 DECL_RESULT (newdecl) = DECL_RESULT (olddecl);
3507 if ((DECL_SAVED_INSNS (newdecl) = DECL_SAVED_INSNS (olddecl)))
3508 /* Previously saved insns go together with
3509 the function's previous definition. */
3510 DECL_INITIAL (newdecl) = DECL_INITIAL (olddecl);
3511 /* Don't clear out the arguments if we're redefining a function. */
3512 if (DECL_ARGUMENTS (olddecl))
3513 DECL_ARGUMENTS (newdecl) = DECL_ARGUMENTS (olddecl);
3515 if (DECL_LANG_SPECIFIC (olddecl))
3516 DECL_MAIN_VARIANT (newdecl) = DECL_MAIN_VARIANT (olddecl);
3519 if (TREE_CODE (newdecl) == NAMESPACE_DECL)
3521 NAMESPACE_LEVEL (newdecl) = NAMESPACE_LEVEL (olddecl);
3524 /* Now preserve various other info from the definition. */
3525 TREE_ADDRESSABLE (newdecl) = TREE_ADDRESSABLE (olddecl);
3526 TREE_ASM_WRITTEN (newdecl) = TREE_ASM_WRITTEN (olddecl);
3527 DECL_COMMON (newdecl) = DECL_COMMON (olddecl);
3528 DECL_ASSEMBLER_NAME (newdecl) = DECL_ASSEMBLER_NAME (olddecl);
3530 if (TREE_CODE (newdecl) == FUNCTION_DECL)
3534 function_size = sizeof (struct tree_decl);
3536 bcopy ((char *) newdecl + sizeof (struct tree_common),
3537 (char *) olddecl + sizeof (struct tree_common),
3538 function_size - sizeof (struct tree_common));
3540 if (DECL_TEMPLATE_INSTANTIATION (newdecl))
3542 /* If newdecl is a template instantiation, it is possible that
3543 the following sequence of events has occurred:
3545 o A friend function was declared in a class template. The
3546 class template was instantiated.
3548 o The instantiation of the friend declaration was
3549 recorded on the instantiation list, and is newdecl.
3551 o Later, however, instantiate_class_template called pushdecl
3552 on the newdecl to perform name injection. But, pushdecl in
3553 turn called duplicate_decls when it discovered that another
3554 declaration of a global function with the same name already
3557 o Here, in duplicate_decls, we decided to clobber newdecl.
3559 If we're going to do that, we'd better make sure that
3560 olddecl, and not newdecl, is on the list of
3561 instantiations so that if we try to do the instantiation
3562 again we won't get the clobbered declaration. */
3564 tree tmpl = DECL_TI_TEMPLATE (newdecl);
3565 tree decls = DECL_TEMPLATE_SPECIALIZATIONS (tmpl);
3567 for (; decls; decls = TREE_CHAIN (decls))
3568 if (TREE_VALUE (decls) == newdecl)
3569 TREE_VALUE (decls) = olddecl;
3574 bcopy ((char *) newdecl + sizeof (struct tree_common),
3575 (char *) olddecl + sizeof (struct tree_common),
3576 sizeof (struct tree_decl) - sizeof (struct tree_common)
3577 + tree_code_length [(int)TREE_CODE (newdecl)] * sizeof (char *));
3580 DECL_UID (olddecl) = olddecl_uid;
3582 DECL_FRIEND_P (olddecl) = 1;
3584 /* NEWDECL contains the merged attribute lists.
3585 Update OLDDECL to be the same. */
3586 DECL_MACHINE_ATTRIBUTES (olddecl) = DECL_MACHINE_ATTRIBUTES (newdecl);
3591 /* Record a decl-node X as belonging to the current lexical scope.
3592 Check for errors (such as an incompatible declaration for the same
3593 name already seen in the same scope).
3595 Returns either X or an old decl for the same name.
3596 If an old decl is returned, it may have been smashed
3597 to agree with what X says. */
3605 int need_new_binding;
3607 /* We shouldn't be calling pushdecl when we're generating RTL for a
3608 function that we already did semantic analysis on previously. */
3609 my_friendly_assert (!cfun || doing_semantic_analysis_p (),
3612 name = DECL_ASSEMBLER_NAME (x);
3613 need_new_binding = 1;
3615 if (DECL_TEMPLATE_PARM_P (x))
3616 /* Template parameters have no context; they are not X::T even
3617 when declared within a class or namespace. */
3621 if (current_function_decl && x != current_function_decl
3622 /* A local declaration for a function doesn't constitute
3624 && !(TREE_CODE (x) == FUNCTION_DECL && !DECL_INITIAL (x))
3625 /* A local declaration for an `extern' variable is in the
3626 scoped of the current namespace, not the current
3628 && !(TREE_CODE (x) == VAR_DECL && DECL_EXTERNAL (x))
3629 && !DECL_CONTEXT (x))
3630 DECL_CONTEXT (x) = current_function_decl;
3631 if (!DECL_CONTEXT (x))
3632 DECL_CONTEXT (x) = FROB_CONTEXT (current_namespace);
3634 /* If this is the declaration for a namespace-scope function,
3635 but the declaration itself is in a local scope, mark the
3637 if (TREE_CODE (x) == FUNCTION_DECL
3638 && DECL_NAMESPACE_SCOPE_P (x)
3639 && current_function_decl
3640 && x != current_function_decl)
3641 DECL_LOCAL_FUNCTION_P (x) = 1;
3644 /* Type are looked up using the DECL_NAME, as that is what the rest of the
3645 compiler wants to use. */
3646 if (TREE_CODE (x) == TYPE_DECL || TREE_CODE (x) == VAR_DECL
3647 || TREE_CODE (x) == NAMESPACE_DECL)
3648 name = DECL_NAME (x);
3653 /* Not needed...see below. */
3657 if (TREE_CODE (name) == TEMPLATE_ID_EXPR)
3658 name = TREE_OPERAND (name, 0);
3660 /* Namespace-scoped variables are not found in the current level. */
3661 if (TREE_CODE (x) == VAR_DECL && DECL_NAMESPACE_SCOPE_P (x))
3662 t = namespace_binding (name, DECL_CONTEXT (x));
3664 t = lookup_name_current_level (name);
3665 if (t == error_mark_node)
3667 /* error_mark_node is 0 for a while during initialization! */
3669 cp_error_at ("`%#D' used prior to declaration", x);
3672 else if (t != NULL_TREE)
3675 /* This is turned off until I have time to do it right (bpk). */
3676 /* With the code below that uses it... */
3677 file = DECL_SOURCE_FILE (t);
3678 line = DECL_SOURCE_LINE (t);
3680 if (TREE_CODE (t) == PARM_DECL)
3682 if (DECL_CONTEXT (t) == NULL_TREE)
3683 fatal ("parse errors have confused me too much");
3685 /* Check for duplicate params. */
3686 if (duplicate_decls (x, t))
3689 else if (((TREE_CODE (x) == FUNCTION_DECL && DECL_LANGUAGE (x) == lang_c)
3690 || DECL_FUNCTION_TEMPLATE_P (x))
3691 && is_overloaded_fn (t))
3692 /* Don't do anything just yet. */;
3693 else if (t == wchar_decl_node)
3695 if (pedantic && ! DECL_IN_SYSTEM_HEADER (x))
3696 cp_pedwarn ("redeclaration of wchar_t as `%T'", TREE_TYPE (x));
3698 /* Throw away the redeclaration. */
3701 else if (TREE_CODE (t) != TREE_CODE (x))
3703 if (duplicate_decls (x, t))
3706 else if (duplicate_decls (x, t))
3709 /* This is turned off until I have time to do it right (bpk). */
3711 /* Also warn if they did a prototype with `static' on it, but
3712 then later left the `static' off. */
3713 if (! TREE_PUBLIC (name) && TREE_PUBLIC (x))
3715 if (DECL_LANG_SPECIFIC (t) && DECL_FRIEND_P (t))
3720 cp_warning ("`static' missing from declaration of `%D'",
3722 warning_with_file_and_line (file, line,
3723 "previous declaration of `%s'",
3724 decl_as_string (t, 0));
3727 /* Now fix things so it'll do what they expect. */
3728 if (current_function_decl)
3729 TREE_PUBLIC (current_function_decl) = 0;
3731 /* Due to interference in memory reclamation (X may be
3732 obstack-deallocated at this point), we must guard against
3733 one really special case. [jason: This should be handled
3734 by start_function] */
3735 if (current_function_decl == x)
3736 current_function_decl = t;
3738 if (TREE_CODE (t) == TYPE_DECL)
3739 SET_IDENTIFIER_TYPE_VALUE (name, TREE_TYPE (t));
3740 else if (TREE_CODE (t) == FUNCTION_DECL)
3741 check_default_args (t);
3745 else if (DECL_MAIN_P (x))
3747 /* A redeclaration of main, but not a duplicate of the
3752 This function shall not be overloaded. */
3753 cp_error_at ("invalid redeclaration of `%D'", t);
3754 cp_error ("as `%D'", x);
3755 /* We don't try to push this declaration since that
3761 check_template_shadow (x);
3763 /* If this is a function conjured up by the backend, massage it
3764 so it looks friendly. */
3765 if (TREE_CODE (x) == FUNCTION_DECL
3766 && ! DECL_LANG_SPECIFIC (x))
3768 retrofit_lang_decl (x);
3769 DECL_LANGUAGE (x) = lang_c;
3772 if (TREE_CODE (x) == FUNCTION_DECL && ! DECL_FUNCTION_MEMBER_P (x))
3774 t = push_overloaded_decl (x, PUSH_LOCAL);
3777 if (!namespace_bindings_p ())
3778 /* We do not need to create a binding for this name;
3779 push_overloaded_decl will have already done so if
3781 need_new_binding = 0;
3783 else if (DECL_FUNCTION_TEMPLATE_P (x) && DECL_NAMESPACE_SCOPE_P (x))
3785 t = push_overloaded_decl (x, PUSH_GLOBAL);
3787 add_decl_to_level (x, NAMESPACE_LEVEL (CP_DECL_CONTEXT (t)));
3791 /* If declaring a type as a typedef, copy the type (unless we're
3792 at line 0), and install this TYPE_DECL as the new type's typedef
3793 name. See the extensive comment in ../c-decl.c (pushdecl). */
3794 if (TREE_CODE (x) == TYPE_DECL)
3796 tree type = TREE_TYPE (x);
3797 if (DECL_SOURCE_LINE (x) == 0)
3799 if (TYPE_NAME (type) == 0)
3800 TYPE_NAME (type) = x;
3802 else if (type != error_mark_node && TYPE_NAME (type) != x
3803 /* We don't want to copy the type when all we're
3804 doing is making a TYPE_DECL for the purposes of
3806 && (!TYPE_NAME (type)
3807 || TYPE_NAME (type) != DECL_ABSTRACT_ORIGIN (x)))
3809 DECL_ORIGINAL_TYPE (x) = type;
3810 type = build_type_copy (type);
3811 TYPE_STUB_DECL (type) = TYPE_STUB_DECL (DECL_ORIGINAL_TYPE (x));
3812 TYPE_NAME (type) = x;
3813 TREE_TYPE (x) = type;
3816 if (type != error_mark_node
3818 && TYPE_IDENTIFIER (type))
3819 set_identifier_type_value_with_scope (DECL_NAME (x), type,
3820 current_binding_level);
3824 /* Multiple external decls of the same identifier ought to match.
3826 We get warnings about inline functions where they are defined.
3827 We get warnings about other functions from push_overloaded_decl.
3829 Avoid duplicate warnings where they are used. */
3830 if (TREE_PUBLIC (x) && TREE_CODE (x) != FUNCTION_DECL)
3834 if (IDENTIFIER_NAMESPACE_VALUE (name) != NULL_TREE
3835 && (DECL_EXTERNAL (IDENTIFIER_NAMESPACE_VALUE (name))
3836 || TREE_PUBLIC (IDENTIFIER_NAMESPACE_VALUE (name))))
3837 decl = IDENTIFIER_NAMESPACE_VALUE (name);
3842 /* If different sort of thing, we already gave an error. */
3843 && TREE_CODE (decl) == TREE_CODE (x)
3844 && !same_type_p (TREE_TYPE (x), TREE_TYPE (decl)))
3846 cp_pedwarn ("type mismatch with previous external decl", x);
3847 cp_pedwarn_at ("previous external decl of `%#D'", decl);
3851 /* This name is new in its binding level.
3852 Install the new declaration and return it. */
3853 if (namespace_bindings_p ())
3855 /* Install a global value. */
3857 /* If the first global decl has external linkage,
3858 warn if we later see static one. */
3859 if (IDENTIFIER_GLOBAL_VALUE (name) == NULL_TREE && TREE_PUBLIC (x))
3860 TREE_PUBLIC (name) = 1;
3862 if (!(TREE_CODE (x) == TYPE_DECL && DECL_ARTIFICIAL (x)
3864 /* For an ordinary function, we create a binding from
3865 the mangled name (i.e., NAME) to the DECL. But, for
3866 an `extern "C"' function, the mangled name and the
3867 ordinary name are the same so we need not do this. */
3868 && !(TREE_CODE (x) == FUNCTION_DECL &&
3869 DECL_LANGUAGE (x) == lang_c))
3871 if (TREE_CODE (x) == FUNCTION_DECL)
3873 ((IDENTIFIER_GLOBAL_VALUE (name) == NULL_TREE)
3874 || (IDENTIFIER_GLOBAL_VALUE (name) == x), 378);
3875 SET_IDENTIFIER_NAMESPACE_VALUE (name, x);
3878 /* Don't forget if the function was used via an implicit decl. */
3879 if (IDENTIFIER_IMPLICIT_DECL (name)
3880 && TREE_USED (IDENTIFIER_IMPLICIT_DECL (name)))
3883 /* Don't forget if its address was taken in that way. */
3884 if (IDENTIFIER_IMPLICIT_DECL (name)
3885 && TREE_ADDRESSABLE (IDENTIFIER_IMPLICIT_DECL (name)))
3886 TREE_ADDRESSABLE (x) = 1;
3888 /* Warn about mismatches against previous implicit decl. */
3889 if (IDENTIFIER_IMPLICIT_DECL (name) != NULL_TREE
3890 /* If this real decl matches the implicit, don't complain. */
3891 && ! (TREE_CODE (x) == FUNCTION_DECL
3892 && TREE_TYPE (TREE_TYPE (x)) == integer_type_node))
3894 ("`%D' was previously implicitly declared to return `int'", x);
3896 /* If new decl is `static' and an `extern' was seen previously,
3898 if (x != NULL_TREE && t != NULL_TREE && decls_match (x, t))
3899 warn_extern_redeclared_static (x, t);
3903 /* Here to install a non-global value. */
3904 tree oldlocal = IDENTIFIER_VALUE (name);
3905 tree oldglobal = IDENTIFIER_NAMESPACE_VALUE (name);
3907 if (need_new_binding)
3909 push_local_binding (name, x, 0);
3910 /* Because push_local_binding will hook X on to the
3911 current_binding_level's name list, we don't want to
3912 do that again below. */
3913 need_new_binding = 0;
3916 /* If this is a TYPE_DECL, push it into the type value slot. */
3917 if (TREE_CODE (x) == TYPE_DECL)
3918 set_identifier_type_value_with_scope (name, TREE_TYPE (x),
3919 current_binding_level);
3921 /* Clear out any TYPE_DECL shadowed by a namespace so that
3922 we won't think this is a type. The C struct hack doesn't
3923 go through namespaces. */
3924 if (TREE_CODE (x) == NAMESPACE_DECL)
3925 set_identifier_type_value_with_scope (name, NULL_TREE,
3926 current_binding_level);
3932 && TREE_CODE (oldlocal) == VAR_DECL
3933 && DECL_DEAD_FOR_LOCAL (oldlocal))
3935 oldlocal = DECL_SHADOWED_FOR_VAR (oldlocal);
3937 if (oldlocal == NULL_TREE)
3938 oldlocal = IDENTIFIER_NAMESPACE_VALUE (DECL_NAME (d));
3941 /* If this is an extern function declaration, see if we
3942 have a global definition or declaration for the function. */
3943 if (oldlocal == NULL_TREE
3944 && DECL_EXTERNAL (x)
3945 && oldglobal != NULL_TREE
3946 && TREE_CODE (x) == FUNCTION_DECL
3947 && TREE_CODE (oldglobal) == FUNCTION_DECL)
3949 /* We have one. Their types must agree. */
3950 if (decls_match (x, oldglobal))
3954 cp_warning ("extern declaration of `%#D' doesn't match", x);
3955 cp_warning_at ("global declaration `%#D'", oldglobal);
3958 /* If we have a local external declaration,
3959 and no file-scope declaration has yet been seen,
3960 then if we later have a file-scope decl it must not be static. */
3961 if (oldlocal == NULL_TREE
3962 && oldglobal == NULL_TREE
3963 && DECL_EXTERNAL (x)
3965 TREE_PUBLIC (name) = 1;
3967 /* Warn if shadowing an argument at the top level of the body. */
3968 if (oldlocal != NULL_TREE && !DECL_EXTERNAL (x)
3969 /* Inline decls shadow nothing. */
3970 && !DECL_FROM_INLINE (x)
3971 && TREE_CODE (oldlocal) == PARM_DECL
3972 /* Don't complain if it's from an enclosing function. */
3973 && DECL_CONTEXT (oldlocal) == current_function_decl
3974 && TREE_CODE (x) != PARM_DECL)
3976 /* Go to where the parms should be and see if we
3978 struct binding_level *b = current_binding_level->level_chain;
3984 if (b->parm_flag == 1)
3985 cp_error ("declaration of `%#D' shadows a parameter", name);
3988 /* Maybe warn if shadowing something else. */
3989 if (warn_shadow && !DECL_EXTERNAL (x)
3990 /* Inline decls shadow nothing. */
3991 && !DECL_FROM_INLINE (x)
3992 /* No shadow warnings for internally generated vars. */
3993 && ! DECL_ARTIFICIAL (x)
3994 /* No shadow warnings for vars made for inlining. */
3995 && ! DECL_FROM_INLINE (x))
3997 if (oldlocal != NULL_TREE && TREE_CODE (oldlocal) == PARM_DECL)
3998 warning ("declaration of `%s' shadows a parameter",
3999 IDENTIFIER_POINTER (name));
4000 else if (IDENTIFIER_CLASS_VALUE (name) != NULL_TREE
4001 && current_class_ptr
4002 && !TREE_STATIC (name))
4003 warning ("declaration of `%s' shadows a member of `this'",
4004 IDENTIFIER_POINTER (name));
4005 else if (oldlocal != NULL_TREE)
4006 warning ("declaration of `%s' shadows previous local",
4007 IDENTIFIER_POINTER (name));
4008 else if (oldglobal != NULL_TREE)
4009 /* XXX shadow warnings in outer-more namespaces */
4010 warning ("declaration of `%s' shadows global declaration",
4011 IDENTIFIER_POINTER (name));
4015 if (TREE_CODE (x) == FUNCTION_DECL)
4016 check_default_args (x);
4018 /* Keep count of variables in this level with incomplete type. */
4019 if (TREE_CODE (x) == VAR_DECL
4020 && TREE_TYPE (x) != error_mark_node
4021 && ((TYPE_SIZE (TREE_TYPE (x)) == NULL_TREE
4022 && PROMOTES_TO_AGGR_TYPE (TREE_TYPE (x), ARRAY_TYPE))
4023 /* RTTI TD entries are created while defining the type_info. */
4024 || (TYPE_LANG_SPECIFIC (TREE_TYPE (x))
4025 && TYPE_BEING_DEFINED (TREE_TYPE (x)))))
4027 if (namespace_bindings_p ())
4028 namespace_scope_incomplete
4029 = tree_cons (NULL_TREE, x, namespace_scope_incomplete);
4031 current_binding_level->incomplete
4032 = tree_cons (NULL_TREE, x, current_binding_level->incomplete);
4036 if (need_new_binding)
4037 add_decl_to_level (x,
4038 DECL_NAMESPACE_SCOPE_P (x)
4039 ? NAMESPACE_LEVEL (CP_DECL_CONTEXT (x))
4040 : current_binding_level);
4045 /* Same as pushdecl, but define X in binding-level LEVEL. We rely on the
4046 caller to set DECL_CONTEXT properly. */
4049 pushdecl_with_scope (x, level)
4051 struct binding_level *level;
4053 register struct binding_level *b;
4054 tree function_decl = current_function_decl;
4056 current_function_decl = NULL_TREE;
4057 if (level->parm_flag == 2)
4059 b = class_binding_level;
4060 class_binding_level = level;
4061 pushdecl_class_level (x);
4062 class_binding_level = b;
4066 b = current_binding_level;
4067 current_binding_level = level;
4069 current_binding_level = b;
4071 current_function_decl = function_decl;
4075 /* Like pushdecl, only it places X in the current namespace,
4079 pushdecl_namespace_level (x)
4082 register struct binding_level *b = current_binding_level;
4085 t = pushdecl_with_scope (x, NAMESPACE_LEVEL (current_namespace));
4087 /* Now, the type_shadowed stack may screw us. Munge it so it does
4089 if (TREE_CODE (x) == TYPE_DECL)
4091 tree name = DECL_NAME (x);
4093 tree *ptr = (tree *)0;
4094 for (; b != global_binding_level; b = b->level_chain)
4096 tree shadowed = b->type_shadowed;
4097 for (; shadowed; shadowed = TREE_CHAIN (shadowed))
4098 if (TREE_PURPOSE (shadowed) == name)
4100 ptr = &TREE_VALUE (shadowed);
4101 /* Can't break out of the loop here because sometimes
4102 a binding level will have duplicate bindings for
4103 PT names. It's gross, but I haven't time to fix it. */
4106 newval = TREE_TYPE (x);
4107 if (ptr == (tree *)0)
4109 /* @@ This shouldn't be needed. My test case "zstring.cc" trips
4110 up here if this is changed to an assertion. --KR */
4111 SET_IDENTIFIER_TYPE_VALUE (name, newval);
4121 /* Like pushdecl, only it places X in GLOBAL_BINDING_LEVEL,
4125 pushdecl_top_level (x)
4128 push_to_top_level ();
4129 x = pushdecl_namespace_level (x);
4130 pop_from_top_level ();
4134 /* Make the declaration of X appear in CLASS scope. */
4137 pushdecl_class_level (x)
4140 /* Don't use DECL_ASSEMBLER_NAME here! Everything that looks in class
4141 scope looks for the pre-mangled name. */
4144 if (TREE_CODE (x) == OVERLOAD)
4145 x = OVL_CURRENT (x);
4146 name = DECL_NAME (x);
4150 push_class_level_binding (name, x);
4151 if (TREE_CODE (x) == TYPE_DECL)
4152 set_identifier_type_value (name, TREE_TYPE (x));
4154 else if (ANON_AGGR_TYPE_P (TREE_TYPE (x)))
4158 for (f = TYPE_FIELDS (TREE_TYPE (x));
4161 pushdecl_class_level (f);
4165 /* Enter DECL into the symbol table, if that's appropriate. Returns
4166 DECL, or a modified version thereof. */
4169 maybe_push_decl (decl)
4172 tree type = TREE_TYPE (decl);
4174 /* Add this decl to the current binding level, but not if it comes
4175 from another scope, e.g. a static member variable. TEM may equal
4176 DECL or it may be a previous decl of the same name. */
4177 if (decl == error_mark_node
4178 || (TREE_CODE (decl) != PARM_DECL
4179 && DECL_CONTEXT (decl) != NULL_TREE
4180 /* Definitions of namespace members outside their namespace are
4182 && TREE_CODE (DECL_CONTEXT (decl)) != NAMESPACE_DECL)
4183 || (TREE_CODE (decl) == TEMPLATE_DECL && !namespace_bindings_p ())
4184 || TREE_CODE (type) == UNKNOWN_TYPE
4185 /* The declaration of a template specialization does not affect
4186 the functions available for overload resolution, so we do not
4188 || (TREE_CODE (decl) == FUNCTION_DECL
4189 && DECL_TEMPLATE_SPECIALIZATION (decl)))
4192 return pushdecl (decl);
4196 /* This function is used to push the mangled decls for nested types into
4197 the appropriate scope. Previously pushdecl_top_level was used, but that
4198 is incorrect for members of local classes. */
4201 pushdecl_nonclass_level (x)
4204 struct binding_level *b = current_binding_level;
4206 my_friendly_assert (b->parm_flag != 2, 180);
4209 /* Get out of template binding levels */
4210 while (b->pseudo_global)
4214 pushdecl_with_scope (x, b);
4218 /* Make the declaration(s) of X appear in CLASS scope
4219 under the name NAME. */
4222 push_class_level_binding (name, x)
4227 /* The class_binding_level will be NULL if x is a template
4228 parameter name in a member template. */
4229 if (!class_binding_level)
4232 /* Make sure that this new member does not have the same name
4233 as a template parameter. */
4234 if (TYPE_BEING_DEFINED (current_class_type))
4235 check_template_shadow (x);
4237 /* If this declaration shadows a declaration from an enclosing
4238 class, then we will need to restore IDENTIFIER_CLASS_VALUE when
4239 we leave this class. Record the shadowed declaration here. */
4240 binding = IDENTIFIER_BINDING (name);
4242 && ((TREE_CODE (x) == OVERLOAD
4243 && BINDING_VALUE (binding)
4244 && is_overloaded_fn (BINDING_VALUE (binding)))
4245 || INHERITED_VALUE_BINDING_P (binding)))
4250 /* If the old binding was from a base class, and was for a tag
4251 name, slide it over to make room for the new binding. The
4252 old binding is still visible if explicitly qualified with a
4254 if (INHERITED_VALUE_BINDING_P (binding)
4255 && BINDING_VALUE (binding)
4256 && TREE_CODE (BINDING_VALUE (binding)) == TYPE_DECL
4257 && DECL_ARTIFICIAL (BINDING_VALUE (binding))
4258 && !(TREE_CODE (x) == TYPE_DECL && DECL_ARTIFICIAL (x)))
4260 old_decl = BINDING_TYPE (binding);
4261 BINDING_TYPE (binding) = BINDING_VALUE (binding);
4262 BINDING_VALUE (binding) = NULL_TREE;
4263 INHERITED_VALUE_BINDING_P (binding) = 0;
4266 old_decl = BINDING_VALUE (binding);
4268 /* There was already a binding for X containing fewer
4269 functions than are named in X. Find the previous
4270 declaration of X on the class-shadowed list, and update it. */
4271 for (shadow = class_binding_level->class_shadowed;
4273 shadow = TREE_CHAIN (shadow))
4274 if (TREE_PURPOSE (shadow) == name
4275 && TREE_TYPE (shadow) == old_decl)
4277 BINDING_VALUE (binding) = x;
4278 INHERITED_VALUE_BINDING_P (binding) = 0;
4279 TREE_TYPE (shadow) = x;
4284 /* If we didn't replace an existing binding, put the binding on the
4285 stack of bindings for the identifier, and update
4286 IDENTIFIER_CLASS_VALUE. */
4287 if (push_class_binding (name, x))
4289 class_binding_level->class_shadowed
4290 = tree_cons (name, IDENTIFIER_CLASS_VALUE (name),
4291 class_binding_level->class_shadowed);
4292 /* Record the value we are binding NAME to so that we can know
4293 what to pop later. */
4294 TREE_TYPE (class_binding_level->class_shadowed) = x;
4298 /* Insert another USING_DECL into the current binding level,
4299 returning this declaration. If this is a redeclaration,
4300 do nothing and return NULL_TREE. */
4303 push_using_decl (scope, name)
4309 my_friendly_assert (TREE_CODE (scope) == NAMESPACE_DECL, 383);
4310 my_friendly_assert (TREE_CODE (name) == IDENTIFIER_NODE, 384);
4311 for (decl = current_binding_level->usings; decl; decl = TREE_CHAIN (decl))
4312 if (DECL_INITIAL (decl) == scope && DECL_NAME (decl) == name)
4316 decl = build_lang_decl (USING_DECL, name, void_type_node);
4317 DECL_INITIAL (decl) = scope;
4318 TREE_CHAIN (decl) = current_binding_level->usings;
4319 current_binding_level->usings = decl;
4323 /* Add namespace to using_directives. Return NULL_TREE if nothing was
4324 changed (i.e. there was already a directive), or the fresh
4325 TREE_LIST otherwise. */
4328 push_using_directive (used)
4331 tree ud = current_binding_level->using_directives;
4332 tree iter, ancestor;
4334 /* Check if we already have this. */
4335 if (purpose_member (used, ud) != NULL_TREE)
4338 /* Recursively add all namespaces used. */
4339 for (iter = DECL_NAMESPACE_USING (used); iter; iter = TREE_CHAIN (iter))
4340 push_using_directive (TREE_PURPOSE (iter));
4342 ancestor = namespace_ancestor (current_decl_namespace (), used);
4343 ud = current_binding_level->using_directives;
4344 ud = tree_cons (used, ancestor, ud);
4345 current_binding_level->using_directives = ud;
4349 /* DECL is a FUNCTION_DECL for a non-member function, which may have
4350 other definitions already in place. We get around this by making
4351 the value of the identifier point to a list of all the things that
4352 want to be referenced by that name. It is then up to the users of
4353 that name to decide what to do with that list.
4355 DECL may also be a TEMPLATE_DECL, with a FUNCTION_DECL in its DECL_RESULT
4356 slot. It is dealt with the same way.
4358 FLAGS is a bitwise-or of the following values:
4359 PUSH_LOCAL: Bind DECL in the current scope, rather than at
4361 PUSH_USING: DECL is being pushed as the result of a using
4364 The value returned may be a previous declaration if we guessed wrong
4365 about what language DECL should belong to (C or C++). Otherwise,
4366 it's always DECL (and never something that's not a _DECL). */
4369 push_overloaded_decl (decl, flags)
4373 tree name = DECL_NAME (decl);
4376 int doing_global = (namespace_bindings_p () || !(flags & PUSH_LOCAL));
4379 old = namespace_binding (name, DECL_CONTEXT (decl));
4381 old = lookup_name_current_level (name);
4385 if (TREE_CODE (old) == TYPE_DECL && DECL_ARTIFICIAL (old))
4387 tree t = TREE_TYPE (old);
4388 if (IS_AGGR_TYPE (t) && warn_shadow
4389 && (! DECL_IN_SYSTEM_HEADER (decl)
4390 || ! DECL_IN_SYSTEM_HEADER (old)))
4391 cp_warning ("`%#D' hides constructor for `%#T'", decl, t);
4394 else if (is_overloaded_fn (old))
4398 for (tmp = old; tmp; tmp = OVL_NEXT (tmp))
4400 tree fn = OVL_CURRENT (tmp);
4402 if (TREE_CODE (tmp) == OVERLOAD && OVL_USED (tmp)
4403 && !(flags & PUSH_USING)
4404 && compparms (TYPE_ARG_TYPES (TREE_TYPE (fn)),
4405 TYPE_ARG_TYPES (TREE_TYPE (decl))))
4406 cp_error ("`%#D' conflicts with previous using declaration `%#D'",
4409 if (duplicate_decls (decl, fn))
4415 cp_error_at ("previous non-function declaration `%#D'", old);
4416 cp_error ("conflicts with function declaration `%#D'", decl);
4421 if (old || TREE_CODE (decl) == TEMPLATE_DECL)
4423 if (old && TREE_CODE (old) != OVERLOAD)
4424 new_binding = ovl_cons (decl, ovl_cons (old, NULL_TREE));
4426 new_binding = ovl_cons (decl, old);
4427 if (flags & PUSH_USING)
4428 OVL_USED (new_binding) = 1;
4431 /* NAME is not ambiguous. */
4435 set_namespace_binding (name, current_namespace, new_binding);
4438 /* We only create an OVERLOAD if there was a previous binding at
4439 this level, or if decl is a template. In the former case, we
4440 need to remove the old binding and replace it with the new
4441 binding. We must also run through the NAMES on the binding
4442 level where the name was bound to update the chain. */
4444 if (TREE_CODE (new_binding) == OVERLOAD && old)
4448 for (d = &BINDING_LEVEL (IDENTIFIER_BINDING (name))->names;
4450 d = &TREE_CHAIN (*d))
4452 || (TREE_CODE (*d) == TREE_LIST
4453 && TREE_VALUE (*d) == old))
4455 if (TREE_CODE (*d) == TREE_LIST)
4456 /* Just replace the old binding with the new. */
4457 TREE_VALUE (*d) = new_binding;
4459 /* Build a TREE_LIST to wrap the OVERLOAD. */
4460 *d = tree_cons (NULL_TREE, new_binding,
4463 /* And update the CPLUS_BINDING node. */
4464 BINDING_VALUE (IDENTIFIER_BINDING (name))
4469 /* We should always find a previous binding in this case. */
4470 my_friendly_abort (0);
4473 /* Install the new binding. */
4474 push_local_binding (name, new_binding, flags);
4480 /* Generate an implicit declaration for identifier FUNCTIONID
4481 as a function of type int (). Print a warning if appropriate. */
4484 implicitly_declare (functionid)
4489 /* We used to reuse an old implicit decl here,
4490 but this loses with inline functions because it can clobber
4491 the saved decl chains. */
4492 decl = build_lang_decl (FUNCTION_DECL, functionid, default_function_type);
4494 DECL_EXTERNAL (decl) = 1;
4495 TREE_PUBLIC (decl) = 1;
4497 /* ISO standard says implicit declarations are in the innermost block.
4498 So we record the decl in the standard fashion. */
4500 rest_of_decl_compilation (decl, NULL_PTR, 0, 0);
4503 /* Only one warning per identifier. */
4504 && IDENTIFIER_IMPLICIT_DECL (functionid) == NULL_TREE)
4506 cp_pedwarn ("implicit declaration of function `%#D'", decl);
4509 SET_IDENTIFIER_IMPLICIT_DECL (functionid, decl);
4514 /* Return zero if the declaration NEWDECL is valid
4515 when the declaration OLDDECL (assumed to be for the same name)
4516 has already been seen.
4517 Otherwise return an error message format string with a %s
4518 where the identifier should go. */
4521 redeclaration_error_message (newdecl, olddecl)
4522 tree newdecl, olddecl;
4524 if (TREE_CODE (newdecl) == TYPE_DECL)
4526 /* Because C++ can put things into name space for free,
4527 constructs like "typedef struct foo { ... } foo"
4528 would look like an erroneous redeclaration. */
4529 if (same_type_p (TREE_TYPE (newdecl), TREE_TYPE (olddecl)))
4532 return "redefinition of `%#D'";
4534 else if (TREE_CODE (newdecl) == FUNCTION_DECL)
4536 /* If this is a pure function, its olddecl will actually be
4537 the original initialization to `0' (which we force to call
4538 abort()). Don't complain about redefinition in this case. */
4539 if (DECL_LANG_SPECIFIC (olddecl) && DECL_PURE_VIRTUAL_P (olddecl))
4542 /* If both functions come from different namespaces, this is not
4543 a redeclaration - this is a conflict with a used function. */
4544 if (DECL_NAMESPACE_SCOPE_P (olddecl)
4545 && DECL_CONTEXT (olddecl) != DECL_CONTEXT (newdecl))
4546 return "`%D' conflicts with used function";
4548 /* We'll complain about linkage mismatches in
4549 warn_extern_redeclared_static. */
4551 /* Defining the same name twice is no good. */
4552 if (DECL_INITIAL (olddecl) != NULL_TREE
4553 && DECL_INITIAL (newdecl) != NULL_TREE)
4555 if (DECL_NAME (olddecl) == NULL_TREE)
4556 return "`%#D' not declared in class";
4558 return "redefinition of `%#D'";
4562 else if (TREE_CODE (newdecl) == TEMPLATE_DECL)
4564 if ((TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == FUNCTION_DECL
4565 && DECL_INITIAL (DECL_TEMPLATE_RESULT (newdecl))
4566 && DECL_INITIAL (DECL_TEMPLATE_RESULT (olddecl)))
4567 || (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == TYPE_DECL
4568 && TYPE_SIZE (TREE_TYPE (newdecl))
4569 && TYPE_SIZE (TREE_TYPE (olddecl))))
4570 return "redefinition of `%#D'";
4573 else if (toplevel_bindings_p () || DECL_NAMESPACE_SCOPE_P (newdecl))
4575 /* Objects declared at top level: */
4576 /* If at least one is a reference, it's ok. */
4577 if (DECL_EXTERNAL (newdecl) || DECL_EXTERNAL (olddecl))
4579 /* Reject two definitions. */
4580 return "redefinition of `%#D'";
4584 /* Objects declared with block scope: */
4585 /* Reject two definitions, and reject a definition
4586 together with an external reference. */
4587 if (!(DECL_EXTERNAL (newdecl) && DECL_EXTERNAL (olddecl)))
4588 return "redeclaration of `%#D'";
4593 /* Create a new label, named ID. */
4596 make_label_decl (id, local_p)
4602 decl = build_decl (LABEL_DECL, id, void_type_node);
4604 /* Make sure every label has an rtx. */
4607 DECL_CONTEXT (decl) = current_function_decl;
4608 DECL_MODE (decl) = VOIDmode;
4609 C_DECLARED_LABEL_FLAG (decl) = local_p;
4611 /* Say where one reference is to the label, for the sake of the
4612 error if it is not defined. */
4613 DECL_SOURCE_LINE (decl) = lineno;
4614 DECL_SOURCE_FILE (decl) = input_filename;
4616 /* Record the fact that this identifier is bound to this label. */
4617 SET_IDENTIFIER_LABEL_VALUE (id, decl);
4619 /* Record this label on the list of used labels so that we can check
4620 at the end of the function to see whether or not the label was
4621 actually defined. */
4622 if ((named_label_uses == NULL || named_label_uses->label_decl != decl)
4623 && (named_label_uses == NULL
4624 || named_label_uses->names_in_scope != current_binding_level->names
4625 || named_label_uses->label_decl != decl))
4627 struct named_label_list *new_ent;
4629 = (struct named_label_list*)oballoc (sizeof (struct named_label_list));
4630 new_ent->label_decl = decl;
4631 new_ent->names_in_scope = current_binding_level->names;
4632 new_ent->binding_level = current_binding_level;
4633 new_ent->lineno_o_goto = lineno;
4634 new_ent->filename_o_goto = input_filename;
4635 new_ent->next = named_label_uses;
4636 named_label_uses = new_ent;
4642 /* Look for a label named ID in the current function. If one cannot
4643 be found, create one. (We keep track of used, but undefined,
4644 labels, and complain about them at the end of a function.) */
4652 /* You can't use labels at global scope. */
4653 if (current_function_decl == NULL_TREE)
4655 error ("label `%s' referenced outside of any function",
4656 IDENTIFIER_POINTER (id));
4660 /* See if we've already got this label. */
4661 decl = IDENTIFIER_LABEL_VALUE (id);
4662 if (decl != NULL_TREE && DECL_CONTEXT (decl) == current_function_decl)
4665 /* Record this label on the list of labels used in this function.
4666 We do this before calling make_label_decl so that we get the
4667 IDENTIFIER_LABEL_VALUE before the new label is declared. */
4668 named_labels = tree_cons (IDENTIFIER_LABEL_VALUE (id), NULL_TREE,
4670 /* We need a new label. */
4671 decl = make_label_decl (id, /*local_p=*/0);
4672 /* Now fill in the information we didn't have before. */
4673 TREE_VALUE (named_labels) = decl;
4678 /* Declare a local label named ID. */
4681 declare_local_label (id)
4686 /* Add a new entry to the SHADOWED_LABELS list so that when we leave
4687 this scope we can restore the old value of
4688 IDENTIFIER_TYPE_VALUE. */
4689 current_binding_level->shadowed_labels
4690 = tree_cons (IDENTIFIER_LABEL_VALUE (id), NULL_TREE,
4691 current_binding_level->shadowed_labels);
4692 /* Look for the label. */
4693 decl = make_label_decl (id, /*local_p=*/1);
4694 /* Now fill in the information we didn't have before. */
4695 TREE_VALUE (current_binding_level->shadowed_labels) = decl;
4700 /* Define a label, specifying the location in the source file.
4701 Return the LABEL_DECL node for the label, if the definition is valid.
4702 Otherwise return 0. */
4705 define_label (filename, line, name)
4710 tree decl = lookup_label (name);
4712 /* After labels, make any new cleanups go into their
4713 own new (temporary) binding contour. */
4714 current_binding_level->more_cleanups_ok = 0;
4716 if (name == get_identifier ("wchar_t"))
4717 cp_pedwarn ("label named wchar_t");
4719 if (DECL_INITIAL (decl) != NULL_TREE)
4721 cp_error ("duplicate label `%D'", decl);
4726 struct named_label_list *uses, *prev;
4730 /* Mark label as having been defined. */
4731 DECL_INITIAL (decl) = error_mark_node;
4732 /* Say where in the source. */
4733 DECL_SOURCE_FILE (decl) = filename;
4734 DECL_SOURCE_LINE (decl) = line;
4737 uses = named_label_uses;
4738 while (uses != NULL)
4739 if (uses->label_decl == decl)
4741 struct binding_level *b = current_binding_level;
4744 tree new_decls = b->names;
4745 tree old_decls = (b == uses->binding_level)
4746 ? uses->names_in_scope : NULL_TREE;
4747 while (new_decls != old_decls)
4749 if (TREE_CODE (new_decls) == VAR_DECL
4750 /* Don't complain about crossing initialization
4751 of internal entities. They can't be accessed,
4752 and they should be cleaned up
4753 by the time we get to the label. */
4754 && ! DECL_ARTIFICIAL (new_decls)
4755 && !(DECL_INITIAL (new_decls) == NULL_TREE
4756 && pod_type_p (TREE_TYPE (new_decls))))
4758 /* This is really only important if we're crossing
4759 an initialization. The POD stuff is just
4760 pedantry; why should it matter if the class
4761 contains a field of pointer to member type? */
4762 int problem = (DECL_INITIAL (new_decls)
4763 || (TYPE_NEEDS_CONSTRUCTING
4764 (TREE_TYPE (new_decls))));
4770 cp_error ("jump to label `%D'", decl);
4771 error_with_file_and_line
4772 (uses->filename_o_goto,
4773 uses->lineno_o_goto, " from here");
4777 cp_pedwarn ("jump to label `%D'", decl);
4778 pedwarn_with_file_and_line
4779 (uses->filename_o_goto,
4780 uses->lineno_o_goto, " from here");
4786 cp_error_at (" crosses initialization of `%#D'",
4789 cp_pedwarn_at (" enters scope of non-POD `%#D'",
4792 new_decls = TREE_CHAIN (new_decls);
4794 if (b == uses->binding_level)
4796 if (b->eh_region && ! saw_eh)
4800 cp_error ("jump to label `%D'", decl);
4801 error_with_file_and_line
4802 (uses->filename_o_goto,
4803 uses->lineno_o_goto, " from here");
4806 error (" enters exception handling block");
4813 prev->next = uses->next;
4815 named_label_uses = uses->next;
4824 current_function_return_value = NULL_TREE;
4831 struct binding_level *level;
4832 struct cp_switch *next;
4835 static struct cp_switch *switch_stack;
4841 = (struct cp_switch *) oballoc (sizeof (struct cp_switch));
4842 p->level = current_binding_level;
4843 p->next = switch_stack;
4850 switch_stack = switch_stack->next;
4853 /* Note that we've seen a definition of a case label, and complain if this
4854 is a bad place for one. */
4857 define_case_label ()
4859 tree cleanup = last_cleanup_this_contour ();
4860 struct binding_level *b = current_binding_level;
4864 /* Don't crash; we'll complain in do_case. */
4869 static int explained = 0;
4870 cp_warning_at ("destructor needed for `%#D'", TREE_PURPOSE (cleanup));
4871 warning ("where case label appears here");
4874 warning ("(enclose actions of previous case statements requiring");
4875 warning ("destructors in their own binding contours.)");
4880 for (; b && b != switch_stack->level; b = b->level_chain)
4882 tree new_decls = b->names;
4883 for (; new_decls; new_decls = TREE_CHAIN (new_decls))
4885 if (TREE_CODE (new_decls) == VAR_DECL
4886 /* Don't complain about crossing initialization
4887 of internal entities. They can't be accessed,
4888 and they should be cleaned up
4889 by the time we get to the label. */
4890 && ! DECL_ARTIFICIAL (new_decls)
4891 && ((DECL_INITIAL (new_decls) != NULL_TREE
4892 && DECL_INITIAL (new_decls) != error_mark_node)
4893 || TYPE_NEEDS_CONSTRUCTING (TREE_TYPE (new_decls))))
4896 error ("jump to case label");
4898 cp_error_at (" crosses initialization of `%#D'",
4904 /* After labels, make any new cleanups go into their
4905 own new (temporary) binding contour. */
4907 current_binding_level->more_cleanups_ok = 0;
4908 current_function_return_value = NULL_TREE;
4911 /* Return the list of declarations of the current level.
4912 Note that this list is in reverse order unless/until
4913 you nreverse it; and when you do nreverse it, you must
4914 store the result back using `storedecls' or you will lose. */
4919 return current_binding_level->names;
4922 /* Return the list of type-tags (for structs, etc) of the current level. */
4927 return current_binding_level->tags;
4930 /* Store the list of declarations of the current level.
4931 This is done for the parameter declarations of a function being defined,
4932 after they are modified in the light of any missing parameters. */
4938 current_binding_level->names = decls;
4941 /* Similarly, store the list of tags of the current level. */
4947 current_binding_level->tags = tags;
4950 /* Given NAME, an IDENTIFIER_NODE,
4951 return the structure (or union or enum) definition for that name.
4952 Searches binding levels from BINDING_LEVEL up to the global level.
4953 If THISLEVEL_ONLY is nonzero, searches only the specified context
4954 (but skips any tag-transparent contexts to find one that is
4955 meaningful for tags).
4956 FORM says which kind of type the caller wants;
4957 it is RECORD_TYPE or UNION_TYPE or ENUMERAL_TYPE.
4958 If the wrong kind of type is found, and it's not a template, an error is
4962 lookup_tag (form, name, binding_level, thislevel_only)
4963 enum tree_code form;
4965 struct binding_level *binding_level;
4968 register struct binding_level *level;
4969 /* Non-zero if, we should look past a pseudo-global level, even if
4971 int allow_pseudo_global = 1;
4973 for (level = binding_level; level; level = level->level_chain)
4976 if (ANON_AGGRNAME_P (name))
4977 for (tail = level->tags; tail; tail = TREE_CHAIN (tail))
4979 /* There's no need for error checking here, because
4980 anon names are unique throughout the compilation. */
4981 if (TYPE_IDENTIFIER (TREE_VALUE (tail)) == name)
4982 return TREE_VALUE (tail);
4984 else if (level->namespace_p)
4985 /* Do namespace lookup. */
4986 for (tail = current_namespace; 1; tail = CP_DECL_CONTEXT (tail))
4988 tree old = binding_for_name (name, tail);
4990 /* If we just skipped past a pseudo global level, even
4991 though THISLEVEL_ONLY, and we find a template class
4992 declaration, then we use the _TYPE node for the
4993 template. See the example below. */
4994 if (thislevel_only && !allow_pseudo_global
4995 && old && BINDING_VALUE (old)
4996 && DECL_CLASS_TEMPLATE_P (BINDING_VALUE (old)))
4997 old = TREE_TYPE (BINDING_VALUE (old));
4999 old = BINDING_TYPE (old);
5001 /* If it has an original type, it is a typedef, and we
5002 should not return it. */
5003 if (old && DECL_ORIGINAL_TYPE (TYPE_NAME (old)))
5005 if (old && TREE_CODE (old) != form
5006 && !(form != ENUMERAL_TYPE && TREE_CODE (old) == TEMPLATE_DECL))
5008 cp_error ("`%#D' redeclared as %C", old, form);
5013 if (thislevel_only || tail == global_namespace)
5017 for (tail = level->tags; tail; tail = TREE_CHAIN (tail))
5019 if (TREE_PURPOSE (tail) == name)
5021 enum tree_code code = TREE_CODE (TREE_VALUE (tail));
5022 /* Should tighten this up; it'll probably permit
5023 UNION_TYPE and a struct template, for example. */
5025 && !(form != ENUMERAL_TYPE && code == TEMPLATE_DECL))
5027 /* Definition isn't the kind we were looking for. */
5028 cp_error ("`%#D' redeclared as %C", TREE_VALUE (tail),
5032 return TREE_VALUE (tail);
5035 if (thislevel_only && ! level->tag_transparent)
5037 if (level->pseudo_global && allow_pseudo_global)
5039 /* We must deal with cases like this:
5041 template <class T> struct S;
5042 template <class T> struct S {};
5044 When looking up `S', for the second declaration, we
5045 would like to find the first declaration. But, we
5046 are in the pseudo-global level created for the
5047 template parameters, rather than the (surrounding)
5048 namespace level. Thus, we keep going one more level,
5049 even though THISLEVEL_ONLY is non-zero. */
5050 allow_pseudo_global = 0;
5062 set_current_level_tags_transparency (tags_transparent)
5063 int tags_transparent;
5065 current_binding_level->tag_transparent = tags_transparent;
5069 /* Given a type, find the tag that was defined for it and return the tag name.
5070 Otherwise return 0. However, the value can never be 0
5071 in the cases in which this is used.
5073 C++: If NAME is non-zero, this is the new name to install. This is
5074 done when replacing anonymous tags with real tag names. */
5077 lookup_tag_reverse (type, name)
5081 register struct binding_level *level;
5083 for (level = current_binding_level; level; level = level->level_chain)
5086 for (tail = level->tags; tail; tail = TREE_CHAIN (tail))
5088 if (TREE_VALUE (tail) == type)
5091 TREE_PURPOSE (tail) = name;
5092 return TREE_PURPOSE (tail);
5099 /* Look up NAME in the NAMESPACE. */
5102 lookup_namespace_name (namespace, name)
5103 tree namespace, name;
5106 tree template_id = NULL_TREE;
5108 my_friendly_assert (TREE_CODE (namespace) == NAMESPACE_DECL, 370);
5110 if (TREE_CODE (name) == NAMESPACE_DECL)
5111 /* This happens for A::B<int> when B is a namespace. */
5113 else if (TREE_CODE (name) == TEMPLATE_DECL)
5115 /* This happens for A::B where B is a template, and there are no
5116 template arguments. */
5117 cp_error ("invalid use of `%D'", name);
5118 return error_mark_node;
5121 namespace = ORIGINAL_NAMESPACE (namespace);
5123 if (TREE_CODE (name) == TEMPLATE_ID_EXPR)
5126 name = TREE_OPERAND (name, 0);
5127 if (TREE_CODE (name) == OVERLOAD)
5128 name = DECL_NAME (OVL_CURRENT (name));
5129 else if (TREE_CODE_CLASS (TREE_CODE (name)) == 'd')
5130 name = DECL_NAME (name);
5133 my_friendly_assert (TREE_CODE (name) == IDENTIFIER_NODE, 373);
5135 val = make_node (CPLUS_BINDING);
5136 if (!qualified_lookup_using_namespace (name, namespace, val, 0))
5137 return error_mark_node;
5139 if (BINDING_VALUE (val))
5141 val = BINDING_VALUE (val);
5145 if (DECL_CLASS_TEMPLATE_P (val))
5146 val = lookup_template_class (val,
5147 TREE_OPERAND (template_id, 1),
5148 /*in_decl=*/NULL_TREE,
5149 /*context=*/NULL_TREE,
5150 /*entering_scope=*/0);
5151 else if (DECL_FUNCTION_TEMPLATE_P (val)
5152 || TREE_CODE (val) == OVERLOAD)
5153 val = lookup_template_function (val,
5154 TREE_OPERAND (template_id, 1));
5157 cp_error ("`%D::%D' is not a template",
5159 return error_mark_node;
5163 /* If we have a single function from a using decl, pull it out. */
5164 if (TREE_CODE (val) == OVERLOAD && ! really_overloaded_fn (val))
5165 val = OVL_FUNCTION (val);
5169 cp_error ("`%D' undeclared in namespace `%D'", name, namespace);
5170 return error_mark_node;
5173 /* Hash a TYPENAME_TYPE. K is really of type `tree'. */
5175 static unsigned long
5183 hash = (((unsigned long) TYPE_CONTEXT (t))
5184 ^ ((unsigned long) DECL_NAME (TYPE_NAME (t))));
5189 /* Compare two TYPENAME_TYPEs. K1 and K2 are really of type `tree'. */
5192 typename_compare (k1, k2)
5203 d1 = TYPE_NAME (t1);
5204 d2 = TYPE_NAME (t2);
5206 return (DECL_NAME (d1) == DECL_NAME (d2)
5207 && same_type_p (TYPE_CONTEXT (t1), TYPE_CONTEXT (t2))
5208 && ((TREE_TYPE (t1) != NULL_TREE)
5209 == (TREE_TYPE (t2) != NULL_TREE))
5210 && same_type_p (TREE_TYPE (t1), TREE_TYPE (t2))
5211 && TYPENAME_TYPE_FULLNAME (t1) == TYPENAME_TYPE_FULLNAME (t2));
5214 /* Build a TYPENAME_TYPE. If the type is `typename T::t', CONTEXT is
5215 the type of `T', NAME is the IDENTIFIER_NODE for `t'. If BASE_TYPE
5216 is non-NULL, this type is being created by the implicit typename
5217 extension, and BASE_TYPE is a type named `t' in some base class of
5218 `T' which depends on template parameters.
5220 Returns the new TYPENAME_TYPE. */
5223 build_typename_type (context, name, fullname, base_type)
5231 struct hash_entry* e;
5233 static struct hash_table ht;
5237 static struct hash_table *h = &ht;
5238 if (!hash_table_init (&ht, &hash_newfunc, &typename_hash,
5240 fatal ("virtual memory exhausted");
5241 ggc_add_tree_hash_table_root (&h, 1);
5244 /* Build the TYPENAME_TYPE. */
5245 t = make_aggr_type (TYPENAME_TYPE);
5246 TYPE_CONTEXT (t) = FROB_CONTEXT (context);
5247 TYPENAME_TYPE_FULLNAME (t) = fullname;
5248 TREE_TYPE (t) = base_type;
5250 /* Build the corresponding TYPE_DECL. */
5251 d = build_decl (TYPE_DECL, name, t);
5252 TYPE_NAME (TREE_TYPE (d)) = d;
5253 TYPE_STUB_DECL (TREE_TYPE (d)) = d;
5254 DECL_CONTEXT (d) = FROB_CONTEXT (context);
5255 DECL_ARTIFICIAL (d) = 1;
5257 /* See if we already have this type. */
5258 e = hash_lookup (&ht, t, /*create=*/false, /*copy=*/0);
5262 /* Insert the type into the table. */
5263 hash_lookup (&ht, t, /*create=*/true, /*copy=*/0);
5268 /* Resolve `typename CONTEXT::NAME'. Returns an appropriate type,
5269 unless an error occurs, in which case error_mark_node is returned.
5270 If COMPLAIN zero, don't complain about any errors that occur. */
5273 make_typename_type (context, name, complain)
5279 if (TREE_CODE_CLASS (TREE_CODE (name)) == 't')
5281 if (!(TYPE_LANG_SPECIFIC (name)
5282 && (CLASSTYPE_IS_TEMPLATE (name)
5283 || CLASSTYPE_USE_TEMPLATE (name))))
5284 name = TYPE_IDENTIFIER (name);
5286 /* Create a TEMPLATE_ID_EXPR for the type. */
5287 name = build_nt (TEMPLATE_ID_EXPR,
5288 CLASSTYPE_TI_TEMPLATE (name),
5289 CLASSTYPE_TI_ARGS (name));
5291 else if (TREE_CODE (name) == TYPE_DECL)
5292 name = DECL_NAME (name);
5296 if (TREE_CODE (name) == TEMPLATE_ID_EXPR)
5298 name = TREE_OPERAND (name, 0);
5299 if (TREE_CODE (name) == TEMPLATE_DECL)
5300 name = TREE_OPERAND (fullname, 0) = DECL_NAME (name);
5302 if (TREE_CODE (name) != IDENTIFIER_NODE)
5303 my_friendly_abort (2000);
5305 if (TREE_CODE (context) == NAMESPACE_DECL)
5307 /* We can get here from typename_sub0 in the explicit_template_type
5308 expansion. Just fail. */
5310 cp_error ("no class template named `%#T' in `%#T'",
5312 return error_mark_node;
5315 if (! uses_template_parms (context)
5316 || currently_open_class (context))
5318 if (TREE_CODE (fullname) == TEMPLATE_ID_EXPR)
5320 tree tmpl = NULL_TREE;
5321 if (IS_AGGR_TYPE (context))
5322 tmpl = lookup_field (context, name, 0, 0);
5323 if (!tmpl || !DECL_CLASS_TEMPLATE_P (tmpl))
5326 cp_error ("no class template named `%#T' in `%#T'",
5328 return error_mark_node;
5331 return lookup_template_class (tmpl,
5332 TREE_OPERAND (fullname, 1),
5334 /*entering_scope=*/0);
5340 if (!IS_AGGR_TYPE (context))
5343 cp_error ("no type named `%#T' in `%#T'", name, context);
5344 return error_mark_node;
5347 t = lookup_field (context, name, 0, 1);
5349 return TREE_TYPE (t);
5353 /* If the CONTEXT is not a template type, then either the field is
5354 there now or its never going to be. */
5355 if (!uses_template_parms (context))
5358 cp_error ("no type named `%#T' in `%#T'", name, context);
5359 return error_mark_node;
5363 return build_typename_type (context, name, fullname, NULL_TREE);
5366 /* Select the right _DECL from multiple choices. */
5369 select_decl (binding, flags)
5374 val = BINDING_VALUE (binding);
5375 if (LOOKUP_NAMESPACES_ONLY (flags))
5377 /* We are not interested in types. */
5378 if (val && TREE_CODE (val) == NAMESPACE_DECL)
5383 /* If we could have a type and
5384 we have nothing or we need a type and have none. */
5385 if (BINDING_TYPE (binding)
5386 && (!val || ((flags & LOOKUP_PREFER_TYPES)
5387 && TREE_CODE (val) != TYPE_DECL)))
5388 val = TYPE_STUB_DECL (BINDING_TYPE (binding));
5389 /* Don't return non-types if we really prefer types. */
5390 else if (val && LOOKUP_TYPES_ONLY (flags) && TREE_CODE (val) != TYPE_DECL
5391 && (TREE_CODE (val) != TEMPLATE_DECL
5392 || !DECL_CLASS_TEMPLATE_P (val)))
5398 /* Unscoped lookup of a global: iterate over current namespaces,
5399 considering using-directives. If SPACESP is non-NULL, store a list
5400 of the namespaces we've considered in it. */
5403 unqualified_namespace_lookup (name, flags, spacesp)
5408 tree b = make_node (CPLUS_BINDING);
5409 tree initial = current_decl_namespace();
5410 tree scope = initial;
5412 struct binding_level *level;
5413 tree val = NULL_TREE;
5416 *spacesp = NULL_TREE;
5418 for (; !val; scope = CP_DECL_CONTEXT (scope))
5421 *spacesp = tree_cons (scope, NULL_TREE, *spacesp);
5422 val = binding_for_name (name, scope);
5424 /* Initialize binding for this context. */
5425 BINDING_VALUE (b) = BINDING_VALUE (val);
5426 BINDING_TYPE (b) = BINDING_TYPE (val);
5428 /* Add all _DECLs seen through local using-directives. */
5429 for (level = current_binding_level;
5430 !level->namespace_p;
5431 level = level->level_chain)
5432 if (!lookup_using_namespace (name, b, level->using_directives,
5433 scope, flags, spacesp))
5434 /* Give up because of error. */
5435 return error_mark_node;
5437 /* Add all _DECLs seen through global using-directives. */
5438 /* XXX local and global using lists should work equally. */
5442 if (!lookup_using_namespace (name, b, DECL_NAMESPACE_USING (siter),
5443 scope, flags, spacesp))
5444 /* Give up because of error. */
5445 return error_mark_node;
5446 if (siter == scope) break;
5447 siter = CP_DECL_CONTEXT (siter);
5450 val = select_decl (b, flags);
5451 if (scope == global_namespace)
5457 /* Combine prefer_type and namespaces_only into flags. */
5460 lookup_flags (prefer_type, namespaces_only)
5461 int prefer_type, namespaces_only;
5463 if (namespaces_only)
5464 return LOOKUP_PREFER_NAMESPACES;
5465 if (prefer_type > 1)
5466 return LOOKUP_PREFER_TYPES;
5467 if (prefer_type > 0)
5468 return LOOKUP_PREFER_BOTH;
5472 /* Given a lookup that returned VAL, use FLAGS to decide if we want to
5473 ignore it or not. Subroutine of lookup_name_real. */
5476 qualify_lookup (val, flags)
5480 if (val == NULL_TREE)
5482 if ((flags & LOOKUP_PREFER_NAMESPACES) && TREE_CODE (val) == NAMESPACE_DECL)
5484 if ((flags & LOOKUP_PREFER_TYPES)
5485 && (TREE_CODE (val) == TYPE_DECL
5486 || ((flags & LOOKUP_TEMPLATES_EXPECTED)
5487 && DECL_CLASS_TEMPLATE_P (val))))
5489 if (flags & (LOOKUP_PREFER_NAMESPACES | LOOKUP_PREFER_TYPES))
5494 /* Any other BINDING overrides an implicit TYPENAME. Warn about
5498 warn_about_implicit_typename_lookup (typename, binding)
5502 tree subtype = TREE_TYPE (TREE_TYPE (typename));
5503 tree name = DECL_NAME (typename);
5505 if (! (TREE_CODE (binding) == TEMPLATE_DECL
5506 && CLASSTYPE_TEMPLATE_INFO (subtype)
5507 && CLASSTYPE_TI_TEMPLATE (subtype) == binding)
5508 && ! (TREE_CODE (binding) == TYPE_DECL
5509 && same_type_p (TREE_TYPE (binding), subtype)))
5511 cp_warning ("lookup of `%D' finds `%#D'",
5513 cp_warning (" instead of `%D' from dependent base class",
5515 cp_warning (" (use `typename %T::%D' if that's what you meant)",
5516 constructor_name (current_class_type), name);
5520 /* Look up NAME in the current binding level and its superiors in the
5521 namespace of variables, functions and typedefs. Return a ..._DECL
5522 node of some kind representing its definition if there is only one
5523 such declaration, or return a TREE_LIST with all the overloaded
5524 definitions if there are many, or return 0 if it is undefined.
5526 If PREFER_TYPE is > 0, we prefer TYPE_DECLs or namespaces.
5527 If PREFER_TYPE is > 1, we reject non-type decls (e.g. namespaces).
5528 If PREFER_TYPE is -2, we're being called from yylex(). (UGLY)
5529 Otherwise we prefer non-TYPE_DECLs.
5531 If NONCLASS is non-zero, we don't look for the NAME in class scope,
5532 using IDENTIFIER_CLASS_VALUE. */
5535 lookup_name_real (name, prefer_type, nonclass, namespaces_only)
5537 int prefer_type, nonclass, namespaces_only;
5540 tree val = NULL_TREE;
5542 tree from_obj = NULL_TREE;
5544 int val_is_implicit_typename = 0;
5546 /* Hack: copy flag set by parser, if set. */
5547 if (only_namespace_names)
5548 namespaces_only = 1;
5550 if (prefer_type == -2)
5552 extern int looking_for_typename;
5553 tree type = NULL_TREE;
5556 prefer_type = looking_for_typename;
5558 flags = lookup_flags (prefer_type, namespaces_only);
5559 /* If the next thing is '<', class templates are types. */
5560 if (looking_for_template)
5561 flags |= LOOKUP_TEMPLATES_EXPECTED;
5563 /* std:: becomes :: for now. */
5564 if (got_scope == std_node)
5565 got_scope = void_type_node;
5569 else if (got_object != error_mark_node)
5574 if (type == error_mark_node)
5575 return error_mark_node;
5576 if (TREE_CODE (type) == TYPENAME_TYPE && TREE_TYPE (type))
5577 type = TREE_TYPE (type);
5580 type = complete_type (type);
5582 if (TREE_CODE (type) == VOID_TYPE)
5583 type = global_namespace;
5584 if (TREE_CODE (type) == NAMESPACE_DECL)
5586 val = make_node (CPLUS_BINDING);
5587 flags |= LOOKUP_COMPLAIN;
5588 if (!qualified_lookup_using_namespace (name, type, val, flags))
5590 val = select_decl (val, flags);
5592 else if (! IS_AGGR_TYPE (type)
5593 || TREE_CODE (type) == TEMPLATE_TYPE_PARM
5594 || TREE_CODE (type) == TEMPLATE_TEMPLATE_PARM
5595 || TREE_CODE (type) == TYPENAME_TYPE)
5596 /* Someone else will give an error about this if needed. */
5598 else if (type == current_class_type)
5599 val = IDENTIFIER_CLASS_VALUE (name);
5602 val = lookup_member (type, name, 0, prefer_type);
5603 type_access_control (type, val);
5611 else if (got_object && val)
5616 flags = lookup_flags (prefer_type, namespaces_only);
5617 /* If we're not parsing, we need to complain. */
5618 flags |= LOOKUP_COMPLAIN;
5621 /* First, look in non-namespace scopes. */
5623 if (current_class_type == NULL_TREE)
5626 for (t = IDENTIFIER_BINDING (name); t; t = TREE_CHAIN (t))
5630 if (!LOCAL_BINDING_P (t) && nonclass)
5631 /* We're not looking for class-scoped bindings, so keep going. */
5634 /* If this is the kind of thing we're looking for, we're done. */
5635 if (qualify_lookup (BINDING_VALUE (t), flags))
5636 binding = BINDING_VALUE (t);
5637 else if ((flags & LOOKUP_PREFER_TYPES)
5638 && qualify_lookup (BINDING_TYPE (t), flags))
5639 binding = BINDING_TYPE (t);
5641 binding = NULL_TREE;
5643 /* Handle access control on types from enclosing or base classes. */
5644 if (binding && ! yylex
5645 && BINDING_LEVEL (t) && BINDING_LEVEL (t)->parm_flag == 2)
5646 type_access_control (BINDING_LEVEL (t)->this_class, binding);
5649 && (!val || !IMPLICIT_TYPENAME_TYPE_DECL_P (binding)))
5651 if (val_is_implicit_typename && !yylex)
5652 warn_about_implicit_typename_lookup (val, binding);
5654 val_is_implicit_typename
5655 = IMPLICIT_TYPENAME_TYPE_DECL_P (val);
5656 if (!val_is_implicit_typename)
5661 /* Now lookup in namespace scopes. */
5662 if (!val || val_is_implicit_typename)
5664 t = unqualified_namespace_lookup (name, flags, 0);
5667 if (val_is_implicit_typename && !yylex)
5668 warn_about_implicit_typename_lookup (val, t);
5676 /* This should only warn about types used in qualified-ids. */
5677 if (from_obj && from_obj != val)
5679 if (looking_for_typename && TREE_CODE (from_obj) == TYPE_DECL
5680 && TREE_CODE (val) == TYPE_DECL
5681 && TREE_TYPE (from_obj) != TREE_TYPE (val))
5683 cp_pedwarn ("lookup of `%D' in the scope of `%#T' (`%#T')",
5684 name, got_object, TREE_TYPE (from_obj));
5685 cp_pedwarn (" does not match lookup in the current scope (`%#T')",
5689 /* We don't change val to from_obj if got_object depends on
5690 template parms because that breaks implicit typename for
5691 destructor calls. */
5692 if (! uses_template_parms (got_object))
5696 /* If we have a single function from a using decl, pull it out. */
5697 if (TREE_CODE (val) == OVERLOAD && ! really_overloaded_fn (val))
5698 val = OVL_FUNCTION (val);
5707 lookup_name_nonclass (name)
5710 return lookup_name_real (name, 0, 1, 0);
5714 lookup_function_nonclass (name, args)
5718 return lookup_arg_dependent (name, lookup_name_nonclass (name), args);
5722 lookup_name_namespace_only (name)
5725 /* type-or-namespace, nonclass, namespace_only */
5726 return lookup_name_real (name, 1, 1, 1);
5730 lookup_name (name, prefer_type)
5734 return lookup_name_real (name, prefer_type, 0, 0);
5737 /* Similar to `lookup_name' but look only in the innermost non-class
5741 lookup_name_current_level (name)
5744 struct binding_level *b;
5747 b = current_binding_level;
5748 while (b->parm_flag == 2)
5753 t = IDENTIFIER_NAMESPACE_VALUE (name);
5755 /* extern "C" function() */
5756 if (t != NULL_TREE && TREE_CODE (t) == TREE_LIST)
5759 else if (IDENTIFIER_BINDING (name)
5760 && LOCAL_BINDING_P (IDENTIFIER_BINDING (name)))
5764 if (BINDING_LEVEL (IDENTIFIER_BINDING (name)) == b)
5765 return IDENTIFIER_VALUE (name);
5777 /* Like lookup_name_current_level, but for types. */
5780 lookup_type_current_level (name)
5783 register tree t = NULL_TREE;
5785 my_friendly_assert (! current_binding_level->namespace_p, 980716);
5787 if (REAL_IDENTIFIER_TYPE_VALUE (name) != NULL_TREE
5788 && REAL_IDENTIFIER_TYPE_VALUE (name) != global_type_node)
5790 struct binding_level *b = current_binding_level;
5793 if (purpose_member (name, b->type_shadowed))
5794 return REAL_IDENTIFIER_TYPE_VALUE (name);
5806 begin_only_namespace_names ()
5808 only_namespace_names = 1;
5812 end_only_namespace_names ()
5814 only_namespace_names = 0;
5817 /* Arrange for the user to get a source line number, even when the
5818 compiler is going down in flames, so that she at least has a
5819 chance of working around problems in the compiler. We used to
5820 call error(), but that let the segmentation fault continue
5821 through; now, it's much more passive by asking them to send the
5822 maintainers mail about the problem. */
5826 int sig ATTRIBUTE_UNUSED;
5828 signal (SIGSEGV, SIG_DFL);
5830 signal (SIGIOT, SIG_DFL);
5833 signal (SIGILL, SIG_DFL);
5836 signal (SIGABRT, SIG_DFL);
5839 signal (SIGBUS, SIG_DFL);
5841 my_friendly_abort (0);
5844 /* Push the declarations of builtin types into the namespace.
5845 RID_INDEX, if < RID_MAX is the index of the builtin type
5846 in the array RID_POINTERS. NAME is the name used when looking
5847 up the builtin type. TYPE is the _TYPE node for the builtin type. */
5850 record_builtin_type (rid_index, name, type)
5855 tree rname = NULL_TREE, tname = NULL_TREE;
5856 tree tdecl = NULL_TREE;
5858 if ((int) rid_index < (int) RID_MAX)
5859 rname = ridpointers[(int) rid_index];
5861 tname = get_identifier (name);
5863 TYPE_BUILT_IN (type) = 1;
5867 tdecl = pushdecl (build_decl (TYPE_DECL, tname, type));
5868 set_identifier_type_value (tname, NULL_TREE);
5869 if ((int) rid_index < (int) RID_MAX)
5870 /* Built-in types live in the global namespace. */
5871 SET_IDENTIFIER_GLOBAL_VALUE (tname, tdecl);
5873 if (rname != NULL_TREE)
5875 if (tname != NULL_TREE)
5877 set_identifier_type_value (rname, NULL_TREE);
5878 SET_IDENTIFIER_GLOBAL_VALUE (rname, tdecl);
5882 tdecl = pushdecl (build_decl (TYPE_DECL, rname, type));
5883 set_identifier_type_value (rname, NULL_TREE);
5888 /* Record one of the standard Java types.
5889 * Declare it as having the given NAME.
5890 * If SIZE > 0, it is the size of one of the integral types;
5891 * otherwise it is the negative of the size of one of the other types. */
5894 record_builtin_java_type (name, size)
5900 type = make_signed_type (size);
5901 else if (size > -32)
5902 { /* "__java_char" or ""__java_boolean". */
5903 type = make_unsigned_type (-size);
5904 /*if (size == -1) TREE_SET_CODE (type, BOOLEAN_TYPE);*/
5907 { /* "__java_float" or ""__java_double". */
5908 type = make_node (REAL_TYPE);
5909 TYPE_PRECISION (type) = - size;
5912 record_builtin_type (RID_MAX, name, type);
5913 decl = TYPE_NAME (type);
5915 /* Suppress generate debug symbol entries for these types,
5916 since for normal C++ they are just clutter.
5917 However, push_lang_context undoes this if extern "Java" is seen. */
5918 DECL_IGNORED_P (decl) = 1;
5920 TYPE_FOR_JAVA (type) = 1;
5924 /* Push a type into the namespace so that the back-ends ignore it. */
5927 record_unknown_type (type, name)
5931 tree decl = pushdecl (build_decl (TYPE_DECL, get_identifier (name), type));
5932 /* Make sure the "unknown type" typedecl gets ignored for debug info. */
5933 DECL_IGNORED_P (decl) = 1;
5934 TYPE_DECL_SUPPRESS_DEBUG (decl) = 1;
5935 TYPE_SIZE (type) = TYPE_SIZE (void_type_node);
5936 TYPE_ALIGN (type) = 1;
5937 TYPE_MODE (type) = TYPE_MODE (void_type_node);
5940 /* Push overloaded decl, in global scope, with one argument so it
5941 can be used as a callback from define_function. */
5944 push_overloaded_decl_1 (x)
5951 auto_function (name, type)
5954 return define_function
5955 (IDENTIFIER_POINTER (name), type, push_overloaded_decl_1,
5956 IDENTIFIER_POINTER (build_decl_overload (name, TYPE_ARG_TYPES (type),
5960 /* Create the predefined scalar types of C,
5961 and some nodes representing standard constants (0, 1, (void *)0).
5962 Initialize the global binding level.
5963 Make definitions for built-in primitive functions. */
5966 init_decl_processing ()
5969 int wchar_type_size;
5970 tree array_domain_type;
5972 /* Check to see that the user did not specify an invalid combination
5973 of command-line options. */
5974 if (flag_new_abi && !flag_vtable_thunks)
5975 fatal ("the new ABI requires vtable thunks");
5977 /* Have to make these distinct before we try using them. */
5978 lang_name_cplusplus = get_identifier ("C++");
5979 lang_name_c = get_identifier ("C");
5980 lang_name_java = get_identifier ("Java");
5982 /* Let the back-end now how to save and restore language-specific
5983 per-function globals. */
5984 init_lang_status = &push_cp_function_context;
5985 free_lang_status = &pop_cp_function_context;
5986 mark_lang_status = &mark_cp_function_context;
5992 /* Create the global variables. */
5993 push_to_top_level ();
5995 /* Enter the global namespace. */
5996 my_friendly_assert (global_namespace == NULL_TREE, 375);
5997 push_namespace (get_identifier ("::"));
5998 global_namespace = current_namespace;
5999 current_lang_name = NULL_TREE;
6001 /* Adjust various flags based on command-line settings. */
6002 if (flag_strict_prototype == 2)
6003 flag_strict_prototype = pedantic;
6004 if (! flag_permissive && ! pedantic)
6005 flag_pedantic_errors = 1;
6006 if (!flag_no_inline)
6007 flag_inline_trees = 1;
6009 strict_prototypes_lang_c = flag_strict_prototype;
6012 current_lang_name = lang_name_c;
6014 current_function_decl = NULL_TREE;
6015 current_binding_level = NULL_BINDING_LEVEL;
6016 free_binding_level = NULL_BINDING_LEVEL;
6018 /* Because most segmentation signals can be traced back into user
6019 code, catch them and at least give the user a chance of working
6020 around compiler bugs. */
6021 signal (SIGSEGV, signal_catch);
6023 /* We will also catch aborts in the back-end through signal_catch and
6024 give the user a chance to see where the error might be, and to defeat
6025 aborts in the back-end when there have been errors previously in their
6028 signal (SIGIOT, signal_catch);
6031 signal (SIGILL, signal_catch);
6034 signal (SIGABRT, signal_catch);
6037 signal (SIGBUS, signal_catch);
6040 build_common_tree_nodes (flag_signed_char);
6042 error_mark_list = build_tree_list (error_mark_node, error_mark_node);
6043 TREE_TYPE (error_mark_list) = error_mark_node;
6045 /* Make the binding_level structure for global names. */
6047 global_binding_level = current_binding_level;
6048 /* The global level is the namespace level of ::. */
6049 NAMESPACE_LEVEL (global_namespace) = global_binding_level;
6050 declare_namespace_level ();
6052 this_identifier = get_identifier (THIS_NAME);
6053 in_charge_identifier = get_identifier (IN_CHARGE_NAME);
6054 ctor_identifier = get_identifier (CTOR_NAME);
6055 dtor_identifier = get_identifier (DTOR_NAME);
6056 pfn_identifier = get_identifier (VTABLE_PFN_NAME);
6057 index_identifier = get_identifier (VTABLE_INDEX_NAME);
6058 delta_identifier = get_identifier (VTABLE_DELTA_NAME);
6059 delta2_identifier = get_identifier (VTABLE_DELTA2_NAME);
6060 pfn_or_delta2_identifier = get_identifier ("__pfn_or_delta2");
6062 /* Define `int' and `char' first so that dbx will output them first. */
6063 record_builtin_type (RID_INT, NULL_PTR, integer_type_node);
6064 record_builtin_type (RID_CHAR, "char", char_type_node);
6066 /* `signed' is the same as `int' */
6067 record_builtin_type (RID_SIGNED, NULL_PTR, integer_type_node);
6068 record_builtin_type (RID_LONG, "long int", long_integer_type_node);
6069 record_builtin_type (RID_UNSIGNED, "unsigned int", unsigned_type_node);
6070 record_builtin_type (RID_MAX, "long unsigned int", long_unsigned_type_node);
6071 record_builtin_type (RID_MAX, "unsigned long", long_unsigned_type_node);
6072 record_builtin_type (RID_MAX, "long long int", long_long_integer_type_node);
6073 record_builtin_type (RID_MAX, "long long unsigned int",
6074 long_long_unsigned_type_node);
6075 record_builtin_type (RID_MAX, "long long unsigned",
6076 long_long_unsigned_type_node);
6077 record_builtin_type (RID_SHORT, "short int", short_integer_type_node);
6078 record_builtin_type (RID_MAX, "short unsigned int", short_unsigned_type_node);
6079 record_builtin_type (RID_MAX, "unsigned short", short_unsigned_type_node);
6082 = TREE_TYPE (IDENTIFIER_GLOBAL_VALUE (get_identifier (PTRDIFF_TYPE)));
6084 /* Define both `signed char' and `unsigned char'. */
6085 record_builtin_type (RID_MAX, "signed char", signed_char_type_node);
6086 record_builtin_type (RID_MAX, "unsigned char", unsigned_char_type_node);
6088 /* `unsigned long' is the standard type for sizeof.
6089 Note that stddef.h uses `unsigned long',
6090 and this must agree, even if long and int are the same size. */
6092 (TREE_TYPE (IDENTIFIER_GLOBAL_VALUE (get_identifier (SIZE_TYPE))));
6094 /* Create the widest literal types. */
6095 widest_integer_literal_type_node = make_signed_type (HOST_BITS_PER_WIDE_INT * 2);
6096 pushdecl (build_decl (TYPE_DECL, NULL_TREE,
6097 widest_integer_literal_type_node));
6099 widest_unsigned_literal_type_node = make_unsigned_type (HOST_BITS_PER_WIDE_INT * 2);
6100 pushdecl (build_decl (TYPE_DECL, NULL_TREE,
6101 widest_unsigned_literal_type_node));
6103 /* These are types that type_for_size and type_for_mode use. */
6104 pushdecl (build_decl (TYPE_DECL, NULL_TREE, intQI_type_node));
6105 pushdecl (build_decl (TYPE_DECL, NULL_TREE, intHI_type_node));
6106 pushdecl (build_decl (TYPE_DECL, NULL_TREE, intSI_type_node));
6107 pushdecl (build_decl (TYPE_DECL, NULL_TREE, intDI_type_node));
6108 #if HOST_BITS_PER_WIDE_INT >= 64
6109 pushdecl (build_decl (TYPE_DECL, get_identifier ("__int128_t"), intTI_type_node));
6111 pushdecl (build_decl (TYPE_DECL, NULL_TREE, unsigned_intQI_type_node));
6112 pushdecl (build_decl (TYPE_DECL, NULL_TREE, unsigned_intHI_type_node));
6113 pushdecl (build_decl (TYPE_DECL, NULL_TREE, unsigned_intSI_type_node));
6114 pushdecl (build_decl (TYPE_DECL, NULL_TREE, unsigned_intDI_type_node));
6115 #if HOST_BITS_PER_WIDE_INT >= 64
6116 pushdecl (build_decl (TYPE_DECL, get_identifier ("__uint128_t"), unsigned_intTI_type_node));
6119 build_common_tree_nodes_2 (flag_short_double);
6121 java_byte_type_node = record_builtin_java_type ("__java_byte", 8);
6122 java_short_type_node = record_builtin_java_type ("__java_short", 16);
6123 java_int_type_node = record_builtin_java_type ("__java_int", 32);
6124 java_long_type_node = record_builtin_java_type ("__java_long", 64);
6125 java_float_type_node = record_builtin_java_type ("__java_float", -32);
6126 java_double_type_node = record_builtin_java_type ("__java_double", -64);
6127 java_char_type_node = record_builtin_java_type ("__java_char", -16);
6128 java_boolean_type_node = record_builtin_java_type ("__java_boolean", -1);
6130 integer_two_node = build_int_2 (2, 0);
6131 TREE_TYPE (integer_two_node) = integer_type_node;
6132 integer_three_node = build_int_2 (3, 0);
6133 TREE_TYPE (integer_three_node) = integer_type_node;
6135 boolean_type_node = make_unsigned_type (BOOL_TYPE_SIZE);
6136 TREE_SET_CODE (boolean_type_node, BOOLEAN_TYPE);
6137 TYPE_MAX_VALUE (boolean_type_node) = build_int_2 (1, 0);
6138 TREE_TYPE (TYPE_MAX_VALUE (boolean_type_node)) = boolean_type_node;
6139 TYPE_PRECISION (boolean_type_node) = 1;
6140 record_builtin_type (RID_BOOL, "bool", boolean_type_node);
6141 boolean_false_node = build_int_2 (0, 0);
6142 TREE_TYPE (boolean_false_node) = boolean_type_node;
6143 boolean_true_node = build_int_2 (1, 0);
6144 TREE_TYPE (boolean_true_node) = boolean_type_node;
6146 signed_size_zero_node = build_int_2 (0, 0); record_builtin_type (RID_FLOAT, NULL_PTR, float_type_node);
6147 record_builtin_type (RID_DOUBLE, NULL_PTR, double_type_node);
6148 record_builtin_type (RID_MAX, "long double", long_double_type_node);
6150 pushdecl (build_decl (TYPE_DECL, get_identifier ("complex int"),
6151 complex_integer_type_node));
6152 pushdecl (build_decl (TYPE_DECL, get_identifier ("complex float"),
6153 complex_float_type_node));
6154 pushdecl (build_decl (TYPE_DECL, get_identifier ("complex double"),
6155 complex_double_type_node));
6156 pushdecl (build_decl (TYPE_DECL, get_identifier ("complex long double"),
6157 complex_long_double_type_node));
6159 TREE_TYPE (signed_size_zero_node) = make_signed_type (TYPE_PRECISION (sizetype));
6161 record_builtin_type (RID_VOID, NULL_PTR, void_type_node);
6162 void_list_node = build_tree_list (NULL_TREE, void_type_node);
6163 TREE_PARMLIST (void_list_node) = 1;
6165 /* Used for expressions that do nothing, but are not errors. */
6166 void_zero_node = build_int_2 (0, 0);
6167 TREE_TYPE (void_zero_node) = void_type_node;
6169 string_type_node = build_pointer_type (char_type_node);
6170 const_string_type_node
6171 = build_pointer_type (build_qualified_type (char_type_node,
6173 empty_except_spec = build_tree_list (NULL_TREE, NULL_TREE);
6175 record_builtin_type (RID_MAX, NULL_PTR, string_type_node);
6178 /* Make a type to be the domain of a few array types
6179 whose domains don't really matter.
6180 200 is small enough that it always fits in size_t. */
6181 array_domain_type = build_index_type (build_int_2 (200, 0));
6183 /* Make a type for arrays of characters.
6184 With luck nothing will ever really depend on the length of this
6186 char_array_type_node
6187 = build_array_type (char_type_node, array_domain_type);
6188 /* Likewise for arrays of ints. */
6190 = build_array_type (integer_type_node, array_domain_type);
6193 delta_type_node = ptrdiff_type_node;
6194 else if (flag_huge_objects)
6195 delta_type_node = long_integer_type_node;
6197 delta_type_node = short_integer_type_node;
6200 vtable_index_type = ptrdiff_type_node;
6202 vtable_index_type = delta_type_node;
6204 default_function_type
6205 = build_function_type (integer_type_node, NULL_TREE);
6207 ptr_type_node = build_pointer_type (void_type_node);
6209 = build_pointer_type (build_qualified_type (void_type_node,
6211 c_common_nodes_and_builtins (1, flag_no_builtin, flag_no_nonansi_builtin);
6212 lang_type_promotes_to = convert_type_from_ellipsis;
6215 = build_exception_variant (void_ftype_ptr, empty_except_spec);
6217 /* C++ extensions */
6219 unknown_type_node = make_node (UNKNOWN_TYPE);
6220 record_unknown_type (unknown_type_node, "unknown type");
6222 /* Indirecting an UNKNOWN_TYPE node yields an UNKNOWN_TYPE node. */
6223 TREE_TYPE (unknown_type_node) = unknown_type_node;
6225 TREE_TYPE (null_node) = type_for_size (POINTER_SIZE, 0);
6227 /* Looking up TYPE_POINTER_TO and TYPE_REFERENCE_TO yield the same
6229 TYPE_POINTER_TO (unknown_type_node) = unknown_type_node;
6230 TYPE_REFERENCE_TO (unknown_type_node) = unknown_type_node;
6232 /* This is special for C++ so functions can be overloaded. */
6233 wchar_type_node = get_identifier (flag_short_wchar
6234 ? "short unsigned int"
6236 wchar_type_node = TREE_TYPE (IDENTIFIER_GLOBAL_VALUE (wchar_type_node));
6237 wchar_type_size = TYPE_PRECISION (wchar_type_node);
6238 signed_wchar_type_node = make_signed_type (wchar_type_size);
6239 unsigned_wchar_type_node = make_unsigned_type (wchar_type_size);
6241 = TREE_UNSIGNED (wchar_type_node)
6242 ? unsigned_wchar_type_node
6243 : signed_wchar_type_node;
6244 record_builtin_type (RID_WCHAR, "__wchar_t", wchar_type_node);
6246 /* Artificial declaration of wchar_t -- can be bashed */
6247 wchar_decl_node = build_decl (TYPE_DECL, get_identifier ("wchar_t"),
6249 pushdecl (wchar_decl_node);
6251 /* This is for wide string constants. */
6252 wchar_array_type_node
6253 = build_array_type (wchar_type_node, array_domain_type);
6255 if (flag_vtable_thunks)
6257 /* Make sure we get a unique function type, so we can give
6258 its pointer type a name. (This wins for gdb.) */
6259 tree vfunc_type = make_node (FUNCTION_TYPE);
6260 TREE_TYPE (vfunc_type) = integer_type_node;
6261 TYPE_ARG_TYPES (vfunc_type) = NULL_TREE;
6262 layout_type (vfunc_type);
6264 vtable_entry_type = build_pointer_type (vfunc_type);
6268 vtable_entry_type = make_aggr_type (RECORD_TYPE);
6269 fields[0] = build_lang_decl (FIELD_DECL, delta_identifier,
6271 fields[1] = build_lang_decl (FIELD_DECL, index_identifier,
6273 fields[2] = build_lang_decl (FIELD_DECL, pfn_identifier,
6275 finish_builtin_type (vtable_entry_type, VTBL_PTR_TYPE, fields, 2,
6278 /* Make this part of an invisible union. */
6279 fields[3] = copy_node (fields[2]);
6280 TREE_TYPE (fields[3]) = delta_type_node;
6281 DECL_NAME (fields[3]) = delta2_identifier;
6282 DECL_MODE (fields[3]) = TYPE_MODE (delta_type_node);
6283 DECL_SIZE (fields[3]) = TYPE_SIZE (delta_type_node);
6284 DECL_SIZE_UNIT (fields[3]) = TYPE_SIZE_UNIT (delta_type_node);
6285 TREE_UNSIGNED (fields[3]) = 0;
6286 TREE_CHAIN (fields[2]) = fields[3];
6287 vtable_entry_type = build_qualified_type (vtable_entry_type,
6290 record_builtin_type (RID_MAX, VTBL_PTR_TYPE, vtable_entry_type);
6293 = build_cplus_array_type (vtable_entry_type, NULL_TREE);
6294 layout_type (vtbl_type_node);
6295 vtbl_type_node = build_qualified_type (vtbl_type_node, TYPE_QUAL_CONST);
6296 record_builtin_type (RID_MAX, NULL_PTR, vtbl_type_node);
6297 vtbl_ptr_type_node = build_pointer_type (vtable_entry_type);
6298 layout_type (vtbl_ptr_type_node);
6299 record_builtin_type (RID_MAX, NULL_PTR, vtbl_ptr_type_node);
6301 std_node = build_decl (NAMESPACE_DECL,
6302 get_identifier (flag_honor_std ? "fake std":"std"),
6304 pushdecl (std_node);
6306 global_type_node = make_node (LANG_TYPE);
6307 record_unknown_type (global_type_node, "global type");
6310 current_lang_name = lang_name_cplusplus;
6313 tree bad_alloc_type_node, newtype, deltype;
6315 push_namespace (get_identifier ("std"));
6316 bad_alloc_type_node = xref_tag
6317 (class_type_node, get_identifier ("bad_alloc"), 1);
6320 newtype = build_exception_variant
6321 (ptr_ftype_sizetype, add_exception_specifier (NULL_TREE, bad_alloc_type_node, -1));
6322 deltype = build_exception_variant (void_ftype_ptr, empty_except_spec);
6323 auto_function (ansi_opname[(int) NEW_EXPR], newtype);
6324 auto_function (ansi_opname[(int) VEC_NEW_EXPR], newtype);
6325 global_delete_fndecl = auto_function (ansi_opname[(int) DELETE_EXPR],
6327 auto_function (ansi_opname[(int) VEC_DELETE_EXPR], deltype);
6331 = define_function ("__pure_virtual", void_ftype, 0, 0);
6333 /* Perform other language dependent initializations. */
6334 init_class_processing ();
6335 init_init_processing ();
6336 init_search_processing ();
6337 init_rtti_processing ();
6339 if (flag_exceptions)
6340 init_exception_processing ();
6343 flag_inline_functions = 0;
6346 if (! supports_one_only ())
6349 /* Create the global bindings for __FUNCTION__ and __PRETTY_FUNCTION__. */
6350 make_fname_decl = cp_make_fname_decl;
6351 declare_function_name ();
6353 /* Prepare to check format strings against argument lists. */
6354 init_function_format_info ();
6356 /* Show we use EH for cleanups. */
6357 using_eh_for_cleanups ();
6359 print_error_function = lang_print_error_function;
6360 lang_get_alias_set = &c_get_alias_set;
6361 valid_lang_attribute = cp_valid_lang_attribute;
6363 /* Maintain consistency. Perhaps we should just complain if they
6364 say -fwritable-strings? */
6365 if (flag_writable_strings)
6366 flag_const_strings = 0;
6368 /* Add GC roots for all of our global variables. */
6369 ggc_add_tree_root (c_global_trees, sizeof c_global_trees / sizeof(tree));
6370 ggc_add_tree_root (cp_global_trees, sizeof cp_global_trees / sizeof(tree));
6371 ggc_add_tree_root (&integer_three_node, 1);
6372 ggc_add_tree_root (&integer_two_node, 1);
6373 ggc_add_tree_root (&signed_size_zero_node, 1);
6374 ggc_add_tree_root (&size_one_node, 1);
6375 ggc_add_tree_root (&size_zero_node, 1);
6376 ggc_add_root (&global_binding_level, 1, sizeof global_binding_level,
6377 mark_binding_level);
6378 ggc_add_root (&scope_chain, 1, sizeof scope_chain, &mark_saved_scope);
6379 ggc_add_tree_root (&static_ctors, 1);
6380 ggc_add_tree_root (&static_dtors, 1);
6381 ggc_add_tree_root (&lastiddecl, 1);
6383 ggc_add_tree_root (&last_function_parm_tags, 1);
6384 ggc_add_tree_root (¤t_function_return_value, 1);
6385 ggc_add_tree_root (¤t_function_parms, 1);
6386 ggc_add_tree_root (¤t_function_parm_tags, 1);
6387 ggc_add_tree_root (&last_function_parms, 1);
6388 ggc_add_tree_root (&error_mark_list, 1);
6390 ggc_add_tree_root (&global_namespace, 1);
6391 ggc_add_tree_root (&global_type_node, 1);
6392 ggc_add_tree_root (&anonymous_namespace_name, 1);
6394 ggc_add_tree_root (&got_object, 1);
6395 ggc_add_tree_root (&got_scope, 1);
6397 ggc_add_tree_root (¤t_lang_name, 1);
6398 ggc_add_tree_root (&static_aggregates, 1);
6401 /* Create the VAR_DECL for __FUNCTION__ etc. ID is the name to give the
6402 decl, NAME is the initialization string and TYPE_DEP indicates whether
6403 NAME depended on the type of the function. We make use of that to detect
6404 __PRETTY_FUNCTION__ inside a template fn. Because we build a tree for
6405 the function before emitting any of it, we don't need to treat the
6406 VAR_DECL specially. We can decide whether to emit it later, if it was
6410 cp_make_fname_decl (id, name, type_dep)
6415 tree decl, type, init;
6416 size_t length = strlen (name);
6417 tree domain = NULL_TREE;
6419 if (!processing_template_decl)
6422 domain = build_index_type (build_int_2 (length, 0));
6424 type = build_cplus_array_type
6425 (build_qualified_type (char_type_node, TYPE_QUAL_CONST),
6428 decl = build_lang_decl (VAR_DECL, id, type);
6429 TREE_STATIC (decl) = 1;
6430 TREE_READONLY (decl) = 1;
6431 DECL_SOURCE_LINE (decl) = 0;
6432 DECL_ARTIFICIAL (decl) = 1;
6433 DECL_IN_SYSTEM_HEADER (decl) = 1;
6435 if (processing_template_decl)
6436 decl = push_template_decl (decl);
6439 init = build (FUNCTION_NAME, type);
6440 DECL_PRETTY_FUNCTION_P (decl) = 1;
6444 init = build_string (length + 1, name);
6445 TREE_TYPE (init) = type;
6447 DECL_INITIAL (decl) = init;
6448 cp_finish_decl (decl, init, NULL_TREE, LOOKUP_ONLYCONVERTING);
6450 /* We will have to make sure we only emit this, if it is actually used. */
6454 /* Function to print any language-specific context for an error message. */
6457 lang_print_error_function (file)
6460 default_print_error_function (file);
6461 maybe_print_template_context ();
6464 /* Make a definition for a builtin function named NAME and whose data type
6465 is TYPE. TYPE should be a function type with argument types.
6467 If LIBRARY_NAME is nonzero, use that for DECL_ASSEMBLER_NAME,
6468 the name to be called if we can't opencode the function. */
6471 define_function (name, type, pfn, library_name)
6474 void (*pfn) PARAMS ((tree));
6475 const char *library_name;
6477 tree decl = build_lang_decl (FUNCTION_DECL, get_identifier (name), type);
6478 DECL_EXTERNAL (decl) = 1;
6479 TREE_PUBLIC (decl) = 1;
6480 DECL_ARTIFICIAL (decl) = 1;
6482 my_friendly_assert (DECL_CONTEXT (decl) == NULL_TREE, 392);
6483 DECL_CONTEXT (decl) = FROB_CONTEXT (current_namespace);
6485 /* Since `pushdecl' relies on DECL_ASSEMBLER_NAME instead of DECL_NAME,
6486 we cannot change DECL_ASSEMBLER_NAME until we have installed this
6487 function in the namespace. */
6488 if (pfn) (*pfn) (decl);
6490 DECL_ASSEMBLER_NAME (decl) = get_identifier (library_name);
6491 make_function_rtl (decl);
6496 /* Wrapper around define_function, for the benefit of
6497 c_common_nodes_and_builtins.
6498 FUNCTION_CODE tells later passes how to compile calls to this function.
6499 See tree.h for its possible values. */
6502 builtin_function (name, type, code, class, libname)
6506 enum built_in_class class;
6507 const char *libname;
6509 tree decl = define_function (name, type, (void (*) PARAMS ((tree)))pushdecl,
6511 DECL_BUILT_IN_CLASS (decl) = class;
6512 DECL_FUNCTION_CODE (decl) = code;
6516 /* When we call finish_struct for an anonymous union, we create
6517 default copy constructors and such. But, an anonymous union
6518 shouldn't have such things; this function undoes the damage to the
6519 anonymous union type T.
6521 (The reason that we create the synthesized methods is that we don't
6522 distinguish `union { int i; }' from `typedef union { int i; } U'.
6523 The first is an anonymous union; the second is just an ordinary
6527 fixup_anonymous_aggr (t)
6532 /* Wipe out memory of synthesized methods */
6533 TYPE_HAS_CONSTRUCTOR (t) = 0;
6534 TYPE_HAS_DEFAULT_CONSTRUCTOR (t) = 0;
6535 TYPE_HAS_INIT_REF (t) = 0;
6536 TYPE_HAS_CONST_INIT_REF (t) = 0;
6537 TYPE_HAS_ASSIGN_REF (t) = 0;
6538 TYPE_HAS_CONST_ASSIGN_REF (t) = 0;
6540 /* Splice the implicitly generated functions out of the TYPE_METHODS
6542 q = &TYPE_METHODS (t);
6545 if (DECL_ARTIFICIAL (*q))
6546 *q = TREE_CHAIN (*q);
6548 q = &TREE_CHAIN (*q);
6551 /* ISO C++ 9.5.3. Anonymous unions may not have function members. */
6552 if (TYPE_METHODS (t))
6553 error ("an anonymous union cannot have function members");
6556 /* Make sure that a declaration with no declarator is well-formed, i.e.
6557 just defines a tagged type or anonymous union.
6559 Returns the type defined, if any. */
6562 check_tag_decl (declspecs)
6566 tree ob_modifier = NULL_TREE;
6568 register tree t = NULL_TREE;
6570 for (link = declspecs; link; link = TREE_CHAIN (link))
6572 register tree value = TREE_VALUE (link);
6578 if (IS_AGGR_TYPE (value) || TREE_CODE (value) == ENUMERAL_TYPE)
6580 my_friendly_assert (TYPE_MAIN_DECL (value) != NULL_TREE, 261);
6584 else if (value == ridpointers[(int) RID_FRIEND])
6586 if (current_class_type == NULL_TREE
6587 || current_scope () != current_class_type)
6588 ob_modifier = value;
6590 else if (value == ridpointers[(int) RID_STATIC]
6591 || value == ridpointers[(int) RID_EXTERN]
6592 || value == ridpointers[(int) RID_AUTO]
6593 || value == ridpointers[(int) RID_REGISTER]
6594 || value == ridpointers[(int) RID_INLINE]
6595 || value == ridpointers[(int) RID_VIRTUAL]
6596 || value == ridpointers[(int) RID_CONST]
6597 || value == ridpointers[(int) RID_VOLATILE]
6598 || value == ridpointers[(int) RID_EXPLICIT])
6599 ob_modifier = value;
6603 error ("multiple types in one declaration");
6605 /* Inside a class, we might be in a friend or access declaration.
6606 Until we have a good way of detecting the latter, don't warn. */
6607 if (t == NULL_TREE && ! current_class_type)
6608 pedwarn ("declaration does not declare anything");
6610 /* Check for an anonymous union. We're careful
6611 accessing TYPE_IDENTIFIER because some built-in types, like
6612 pointer-to-member types, do not have TYPE_NAME. */
6613 else if (t && IS_AGGR_TYPE_CODE (TREE_CODE (t))
6615 && ANON_AGGRNAME_P (TYPE_IDENTIFIER (t)))
6617 /* Anonymous unions are objects, so they can have specifiers. */;
6618 SET_ANON_AGGR_TYPE_P (t);
6620 if (TREE_CODE (t) != UNION_TYPE && pedantic && ! in_system_header)
6621 pedwarn ("ISO C++ prohibits anonymous structs");
6624 else if (ob_modifier)
6626 if (ob_modifier == ridpointers[(int) RID_INLINE]
6627 || ob_modifier == ridpointers[(int) RID_VIRTUAL])
6628 cp_error ("`%D' can only be specified for functions", ob_modifier);
6629 else if (ob_modifier == ridpointers[(int) RID_FRIEND])
6630 cp_error ("`%D' can only be specified inside a class", ob_modifier);
6631 else if (ob_modifier == ridpointers[(int) RID_EXPLICIT])
6632 cp_error ("`%D' can only be specified for constructors",
6635 cp_error ("`%D' can only be specified for objects and functions",
6642 /* Called when a declaration is seen that contains no names to declare.
6643 If its type is a reference to a structure, union or enum inherited
6644 from a containing scope, shadow that tag name for the current scope
6645 with a forward reference.
6646 If its type defines a new named structure or union
6647 or defines an enum, it is valid but we need not do anything here.
6648 Otherwise, it is an error.
6650 C++: may have to grok the declspecs to learn about static,
6651 complain for anonymous unions. */
6654 shadow_tag (declspecs)
6657 tree t = check_tag_decl (declspecs);
6660 maybe_process_partial_specialization (t);
6662 /* This is where the variables in an anonymous union are
6663 declared. An anonymous union declaration looks like:
6665 because there is no declarator after the union, the parser
6666 sends that declaration here. */
6667 if (t && ANON_AGGR_TYPE_P (t))
6669 fixup_anonymous_aggr (t);
6671 if (TYPE_FIELDS (t))
6673 tree decl = grokdeclarator (NULL_TREE, declspecs, NORMAL, 0,
6675 finish_anon_union (decl);
6680 /* Decode a "typename", such as "int **", returning a ..._TYPE node. */
6683 groktypename (typename)
6686 if (TREE_CODE (typename) != TREE_LIST)
6688 return grokdeclarator (TREE_VALUE (typename),
6689 TREE_PURPOSE (typename),
6690 TYPENAME, 0, NULL_TREE);
6693 /* Decode a declarator in an ordinary declaration or data definition.
6694 This is called as soon as the type information and variable name
6695 have been parsed, before parsing the initializer if any.
6696 Here we create the ..._DECL node, fill in its type,
6697 and put it on the list of decls for the current context.
6698 The ..._DECL node is returned as the value.
6700 Exception: for arrays where the length is not specified,
6701 the type is left null, to be filled in by `cp_finish_decl'.
6703 Function definitions do not come here; they go to start_function
6704 instead. However, external and forward declarations of functions
6705 do go through here. Structure field declarations are done by
6706 grokfield and not through here. */
6708 /* Set this to zero to debug not using the temporary obstack
6709 to parse initializers. */
6710 int debug_temp_inits = 1;
6713 start_decl (declarator, declspecs, initialized, attributes, prefix_attributes)
6714 tree declarator, declspecs;
6716 tree attributes, prefix_attributes;
6719 register tree type, tem;
6721 extern int have_extern_spec;
6722 extern int used_extern_spec;
6726 /* See code below that used this. */
6727 int init_written = initialized;
6730 /* This should only be done once on the top most decl. */
6731 if (have_extern_spec && !used_extern_spec)
6733 declspecs = decl_tree_cons (NULL_TREE, get_identifier ("extern"),
6735 used_extern_spec = 1;
6738 if (attributes || prefix_attributes)
6739 attrlist = build_tree_list (attributes, prefix_attributes);
6741 attrlist = NULL_TREE;
6743 decl = grokdeclarator (declarator, declspecs, NORMAL, initialized,
6746 if (decl == NULL_TREE || TREE_CODE (decl) == VOID_TYPE)
6749 type = TREE_TYPE (decl);
6751 if (type == error_mark_node)
6754 context = DECL_CONTEXT (decl);
6756 if (initialized && context && TREE_CODE (context) == NAMESPACE_DECL
6757 && context != current_namespace && TREE_CODE (decl) == VAR_DECL)
6759 /* When parsing the initializer, lookup should use the object's
6761 push_decl_namespace (context);
6764 /* We are only interested in class contexts, later. */
6765 if (context && TREE_CODE (context) == NAMESPACE_DECL)
6766 context = NULL_TREE;
6769 /* Is it valid for this decl to have an initializer at all?
6770 If not, set INITIALIZED to zero, which will indirectly
6771 tell `cp_finish_decl' to ignore the initializer once it is parsed. */
6772 switch (TREE_CODE (decl))
6775 /* typedef foo = bar means give foo the same type as bar.
6776 We haven't parsed bar yet, so `cp_finish_decl' will fix that up.
6777 Any other case of an initialization in a TYPE_DECL is an error. */
6778 if (pedantic || list_length (declspecs) > 1)
6780 cp_error ("typedef `%D' is initialized", decl);
6786 cp_error ("function `%#D' is initialized like a variable", decl);
6796 if (! toplevel_bindings_p ()
6797 && DECL_EXTERNAL (decl))
6798 cp_warning ("declaration of `%#D' has `extern' and is initialized",
6800 DECL_EXTERNAL (decl) = 0;
6801 if (toplevel_bindings_p ())
6802 TREE_STATIC (decl) = 1;
6804 /* Tell `pushdecl' this is an initialized decl
6805 even though we don't yet have the initializer expression.
6806 Also tell `cp_finish_decl' it may store the real initializer. */
6807 DECL_INITIAL (decl) = error_mark_node;
6810 #ifdef SET_DEFAULT_DECL_ATTRIBUTES
6811 SET_DEFAULT_DECL_ATTRIBUTES (decl, attributes);
6814 /* Set attributes here so if duplicate decl, will have proper attributes. */
6815 cplus_decl_attributes (decl, attributes, prefix_attributes);
6817 if (context && TYPE_SIZE (complete_type (context)) != NULL_TREE)
6819 push_nested_class (context, 2);
6821 if (TREE_CODE (decl) == VAR_DECL)
6823 tree field = lookup_field (context, DECL_NAME (decl), 0, 0);
6824 if (field == NULL_TREE || TREE_CODE (field) != VAR_DECL)
6825 cp_error ("`%#D' is not a static member of `%#T'", decl, context);
6828 if (DECL_CONTEXT (field) != context)
6830 cp_pedwarn ("ISO C++ does not permit `%T::%D' to be defined as `%T::%D'",
6831 DECL_CONTEXT (field), DECL_NAME (decl),
6832 context, DECL_NAME (decl));
6833 DECL_CONTEXT (decl) = DECL_CONTEXT (field);
6835 /* Static data member are tricky; an in-class initialization
6836 still doesn't provide a definition, so the in-class
6837 declaration will have DECL_EXTERNAL set, but will have an
6838 initialization. Thus, duplicate_decls won't warn
6839 about this situation, and so we check here. */
6840 if (DECL_INITIAL (decl) && DECL_INITIAL (field))
6841 cp_error ("duplicate initialization of %D", decl);
6842 if (duplicate_decls (decl, field))
6848 tree field = check_classfn (context, decl);
6849 if (field && duplicate_decls (decl, field))
6853 /* cp_finish_decl sets DECL_EXTERNAL if DECL_IN_AGGR_P is set. */
6854 DECL_IN_AGGR_P (decl) = 0;
6855 if ((DECL_LANG_SPECIFIC (decl) && DECL_USE_TEMPLATE (decl))
6856 || CLASSTYPE_USE_TEMPLATE (context))
6858 SET_DECL_TEMPLATE_SPECIALIZATION (decl);
6859 /* [temp.expl.spec] An explicit specialization of a static data
6860 member of a template is a definition if the declaration
6861 includes an initializer; otherwise, it is a declaration.
6863 We check for processing_specialization so this only applies
6864 to the new specialization syntax. */
6865 if (DECL_INITIAL (decl) == NULL_TREE && processing_specialization)
6866 DECL_EXTERNAL (decl) = 1;
6869 if (DECL_EXTERNAL (decl) && ! DECL_TEMPLATE_SPECIALIZATION (decl))
6870 cp_pedwarn ("declaration of `%#D' outside of class is not definition",
6874 /* Enter this declaration into the symbol table. */
6875 tem = maybe_push_decl (decl);
6877 if (processing_template_decl)
6878 tem = push_template_decl (tem);
6880 #if ! defined (ASM_OUTPUT_BSS) && ! defined (ASM_OUTPUT_ALIGNED_BSS)
6881 /* Tell the back-end to use or not use .common as appropriate. If we say
6882 -fconserve-space, we want this to save .data space, at the expense of
6883 wrong semantics. If we say -fno-conserve-space, we want this to
6884 produce errors about redefs; to do this we force variables into the
6886 DECL_COMMON (tem) = flag_conserve_space || ! TREE_PUBLIC (tem);
6889 if (! processing_template_decl)
6899 tree type = TREE_TYPE (decl);
6900 int initialized = (DECL_INITIAL (decl) != NULL_TREE);
6902 if (type == error_mark_node)
6905 /* If this type of object needs a cleanup, but we're not allowed to
6906 add any more objects with cleanups to the current scope, create a
6907 new binding level. */
6908 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type)
6909 && current_binding_level->more_cleanups_ok == 0)
6911 keep_next_level (2);
6914 add_scope_stmt (/*begin_p=*/1, /*partial_p=*/1);
6918 /* Is it valid for this decl to have an initializer at all?
6919 If not, set INITIALIZED to zero, which will indirectly
6920 tell `cp_finish_decl' to ignore the initializer once it is parsed. */
6922 /* Don't allow initializations for incomplete types except for
6923 arrays which might be completed by the initialization. */
6924 if (TYPE_SIZE (complete_type (type)) != NULL_TREE)
6925 ; /* A complete type is ok. */
6926 else if (TREE_CODE (type) != ARRAY_TYPE)
6928 cp_error ("variable `%#D' has initializer but incomplete type",
6931 type = TREE_TYPE (decl) = error_mark_node;
6933 else if (TYPE_SIZE (complete_type (TREE_TYPE (type))) == NULL_TREE)
6935 if (DECL_LANG_SPECIFIC (decl) && DECL_TEMPLATE_INFO (decl))
6936 cp_error ("elements of array `%#D' have incomplete type", decl);
6937 /* else we already gave an error in start_decl. */
6943 && TREE_CODE (decl) != TYPE_DECL
6944 && TREE_CODE (decl) != TEMPLATE_DECL
6945 && type != error_mark_node
6946 && IS_AGGR_TYPE (type)
6947 && ! DECL_EXTERNAL (decl))
6949 if ((! processing_template_decl || ! uses_template_parms (type))
6950 && TYPE_SIZE (complete_type (type)) == NULL_TREE)
6952 cp_error ("aggregate `%#D' has incomplete type and cannot be initialized",
6954 /* Change the type so that assemble_variable will give
6955 DECL an rtl we can live with: (mem (const_int 0)). */
6956 type = TREE_TYPE (decl) = error_mark_node;
6960 /* If any base type in the hierarchy of TYPE needs a constructor,
6961 then we set initialized to 1. This way any nodes which are
6962 created for the purposes of initializing this aggregate
6963 will live as long as it does. This is necessary for global
6964 aggregates which do not have their initializers processed until
6965 the end of the file. */
6966 initialized = TYPE_NEEDS_CONSTRUCTING (type);
6971 DECL_INITIAL (decl) = NULL_TREE;
6974 /* Handle initialization of references.
6975 These three arguments are from `cp_finish_decl', and have the
6976 same meaning here that they do there.
6978 Quotes on semantics can be found in ARM 8.4.3. */
6981 grok_reference_init (decl, type, init)
6982 tree decl, type, init;
6986 if (init == NULL_TREE)
6988 if ((DECL_LANG_SPECIFIC (decl) == 0
6989 || DECL_IN_AGGR_P (decl) == 0)
6990 && ! DECL_THIS_EXTERN (decl))
6991 cp_error ("`%D' declared as reference but not initialized", decl);
6995 if (init == error_mark_node)
6998 if (TREE_CODE (init) == CONSTRUCTOR)
7000 cp_error ("ISO C++ forbids use of initializer list to initialize reference `%D'", decl);
7004 if (TREE_CODE (init) == TREE_LIST)
7005 init = build_compound_expr (init);
7007 if (TREE_CODE (TREE_TYPE (init)) == REFERENCE_TYPE)
7008 init = convert_from_reference (init);
7010 if (TREE_CODE (TREE_TYPE (type)) != ARRAY_TYPE
7011 && TREE_CODE (TREE_TYPE (init)) == ARRAY_TYPE)
7013 /* Note: default conversion is only called in very special cases. */
7014 init = default_conversion (init);
7017 /* Convert INIT to the reference type TYPE. This may involve the
7018 creation of a temporary, whose lifetime must be the same as that
7019 of the reference. If so, a DECL_STMT for the temporary will be
7020 added just after the DECL_STMT for DECL. That's why we don't set
7021 DECL_INITIAL for local references (instead assigning to them
7022 explicitly); we need to allow the temporary to be initialized
7024 tmp = convert_to_reference
7025 (type, init, CONV_IMPLICIT,
7026 LOOKUP_SPECULATIVELY|LOOKUP_NORMAL|DIRECT_BIND, decl);
7028 if (tmp == error_mark_node)
7030 else if (tmp != NULL_TREE)
7033 tmp = save_expr (tmp);
7034 if (building_stmt_tree ())
7036 /* Initialize the declaration. */
7037 tmp = build (INIT_EXPR, TREE_TYPE (decl), decl, tmp);
7038 finish_expr_stmt (tmp);
7041 DECL_INITIAL (decl) = tmp;
7045 cp_error ("cannot initialize `%T' from `%T'", type, TREE_TYPE (init));
7049 if (TREE_STATIC (decl) && ! TREE_CONSTANT (DECL_INITIAL (decl)))
7051 expand_static_init (decl, DECL_INITIAL (decl));
7052 DECL_INITIAL (decl) = NULL_TREE;
7057 /* Fill in DECL_INITIAL with some magical value to prevent expand_decl from
7058 mucking with forces it does not comprehend (i.e. initialization with a
7059 constructor). If we are at global scope and won't go into COMMON, fill
7060 it in with a dummy CONSTRUCTOR to force the variable into .data;
7061 otherwise we can use error_mark_node. */
7064 obscure_complex_init (decl, init)
7067 if (! flag_no_inline && TREE_STATIC (decl))
7069 if (extract_init (decl, init))
7073 #if ! defined (ASM_OUTPUT_BSS) && ! defined (ASM_OUTPUT_ALIGNED_BSS)
7074 if (toplevel_bindings_p () && ! DECL_COMMON (decl))
7075 DECL_INITIAL (decl) = build (CONSTRUCTOR, TREE_TYPE (decl), NULL_TREE,
7079 DECL_INITIAL (decl) = error_mark_node;
7084 /* When parsing `int a[] = {1, 2};' we don't know the size of the
7085 array until we finish parsing the initializer. If that's the
7086 situation we're in, update DECL accordingly. */
7089 maybe_deduce_size_from_array_init (decl, init)
7093 tree type = TREE_TYPE (decl);
7095 if (TREE_CODE (type) == ARRAY_TYPE
7096 && TYPE_DOMAIN (type) == NULL_TREE
7097 && TREE_CODE (decl) != TYPE_DECL)
7100 = (TREE_STATIC (decl)
7101 /* Even if pedantic, an external linkage array
7102 may have incomplete type at first. */
7103 ? pedantic && ! DECL_EXTERNAL (decl)
7104 : !DECL_EXTERNAL (decl));
7105 tree initializer = init ? init : DECL_INITIAL (decl);
7106 int failure = complete_array_type (type, initializer, do_default);
7109 cp_error ("initializer fails to determine size of `%D'", decl);
7114 cp_error ("array size missing in `%D'", decl);
7115 /* If a `static' var's size isn't known, make it extern as
7116 well as static, so it does not get allocated. If it's not
7117 `static', then don't mark it extern; finish_incomplete_decl
7118 will give it a default size and it will get allocated. */
7119 else if (!pedantic && TREE_STATIC (decl) && !TREE_PUBLIC (decl))
7120 DECL_EXTERNAL (decl) = 1;
7123 if (pedantic && TYPE_DOMAIN (type) != NULL_TREE
7124 && tree_int_cst_lt (TYPE_MAX_VALUE (TYPE_DOMAIN (type)),
7126 cp_error ("zero-size array `%D'", decl);
7128 layout_decl (decl, 0);
7132 /* Set DECL_SIZE, DECL_ALIGN, etc. for DECL (a VAR_DECL), and issue
7133 any appropriate error messages regarding the layout. */
7136 layout_var_decl (decl)
7139 tree type = TREE_TYPE (decl);
7141 tree ttype = target_type (type);
7144 /* If we haven't already layed out this declaration, do so now.
7145 Note that we must not call complete type for an external object
7146 because it's type might involve templates that we are not
7147 supposed to isntantiate yet. (And it's perfectly legal to say
7148 `extern X x' for some incomplete type `X'.) */
7149 if (!DECL_EXTERNAL (decl))
7150 complete_type (type);
7151 if (!DECL_SIZE (decl) && TYPE_SIZE (type))
7152 layout_decl (decl, 0);
7154 if (!DECL_EXTERNAL (decl) && DECL_SIZE (decl) == NULL_TREE)
7156 /* An automatic variable with an incomplete type: that is an error.
7157 Don't talk about array types here, since we took care of that
7158 message in grokdeclarator. */
7159 cp_error ("storage size of `%D' isn't known", decl);
7160 TREE_TYPE (decl) = error_mark_node;
7163 /* Keep this code around in case we later want to control debug info
7164 based on whether a type is "used". (jason 1999-11-11) */
7166 else if (!DECL_EXTERNAL (decl) && IS_AGGR_TYPE (ttype))
7167 /* Let debugger know it should output info for this type. */
7168 note_debug_info_needed (ttype);
7170 if (TREE_STATIC (decl) && DECL_CLASS_SCOPE_P (decl))
7171 note_debug_info_needed (DECL_CONTEXT (decl));
7174 if ((DECL_EXTERNAL (decl) || TREE_STATIC (decl))
7175 && DECL_SIZE (decl) != NULL_TREE
7176 && ! TREE_CONSTANT (DECL_SIZE (decl)))
7178 if (TREE_CODE (DECL_SIZE (decl)) == INTEGER_CST)
7179 constant_expression_warning (DECL_SIZE (decl));
7181 cp_error ("storage size of `%D' isn't constant", decl);
7185 /* If a local static variable is declared in an inline function, or if
7186 we have a weak definition, we must endeavor to create only one
7187 instance of the variable at link-time. */
7190 maybe_commonize_var (decl)
7193 /* Static data in a function with comdat linkage also has comdat
7195 if (TREE_STATIC (decl)
7196 /* Don't mess with __FUNCTION__. */
7197 && ! TREE_ASM_WRITTEN (decl)
7198 && current_function_decl
7199 && DECL_CONTEXT (decl) == current_function_decl
7200 && (DECL_THIS_INLINE (current_function_decl)
7201 || DECL_TEMPLATE_INSTANTIATION (current_function_decl))
7202 && TREE_PUBLIC (current_function_decl))
7204 /* Rather than try to get this right with inlining, we suppress
7205 inlining of such functions. */
7206 current_function_cannot_inline
7207 = "function with static variable cannot be inline";
7209 /* If flag_weak, we don't need to mess with this, as we can just
7210 make the function weak, and let it refer to its unique local
7211 copy. This works because we don't allow the function to be
7215 if (DECL_INTERFACE_KNOWN (current_function_decl))
7217 TREE_PUBLIC (decl) = 1;
7218 DECL_EXTERNAL (decl) = DECL_EXTERNAL (current_function_decl);
7220 else if (DECL_INITIAL (decl) == NULL_TREE
7221 || DECL_INITIAL (decl) == error_mark_node)
7223 TREE_PUBLIC (decl) = 1;
7224 DECL_COMMON (decl) = 1;
7226 /* else we lose. We can only do this if we can use common,
7227 which we can't if it has been initialized. */
7229 if (TREE_PUBLIC (decl))
7230 DECL_ASSEMBLER_NAME (decl)
7231 = build_static_name (current_function_decl, DECL_NAME (decl));
7232 else if (! DECL_ARTIFICIAL (decl))
7234 cp_warning_at ("sorry: semantics of inline function static data `%#D' are wrong (you'll wind up with multiple copies)", decl);
7235 cp_warning_at (" you can work around this by removing the initializer", decl);
7239 else if (DECL_LANG_SPECIFIC (decl) && DECL_COMDAT (decl))
7240 /* Set it up again; we might have set DECL_INITIAL since the last
7242 comdat_linkage (decl);
7245 /* Issue an error message if DECL is an uninitialized const variable. */
7248 check_for_uninitialized_const_var (decl)
7251 tree type = TREE_TYPE (decl);
7253 /* ``Unless explicitly declared extern, a const object does not have
7254 external linkage and must be initialized. ($8.4; $12.1)'' ARM
7256 if (TREE_CODE (decl) == VAR_DECL
7257 && TREE_CODE (type) != REFERENCE_TYPE
7258 && CP_TYPE_CONST_P (type)
7259 && !TYPE_NEEDS_CONSTRUCTING (type)
7260 && !DECL_INITIAL (decl))
7261 cp_error ("uninitialized const `%D'", decl);
7264 /* Verify INIT (the initializer for DECL), and record the
7265 initialization in DECL_INITIAL, if appropriate. Returns a new
7269 check_initializer (decl, init)
7275 if (TREE_CODE (decl) == FIELD_DECL)
7278 type = TREE_TYPE (decl);
7280 /* If `start_decl' didn't like having an initialization, ignore it now. */
7281 if (init != NULL_TREE && DECL_INITIAL (decl) == NULL_TREE)
7284 /* Check the initializer. */
7287 /* Things that are going to be initialized need to have complete
7289 TREE_TYPE (decl) = type = complete_type (TREE_TYPE (decl));
7291 if (type == error_mark_node)
7292 /* We will have already complained. */
7294 else if (TYPE_SIZE (type) && !TREE_CONSTANT (TYPE_SIZE (type)))
7296 cp_error ("variable-sized object `%D' may not be initialized", decl);
7299 else if (TREE_CODE (type) == ARRAY_TYPE
7300 && !TYPE_SIZE (TREE_TYPE (type)))
7302 cp_error ("elements of array `%#D' have incomplete type", decl);
7305 else if (!TYPE_SIZE (type))
7307 cp_error ("`%D' has incomplete type", decl);
7308 TREE_TYPE (decl) = error_mark_node;
7313 if (TREE_CODE (decl) == CONST_DECL)
7315 my_friendly_assert (TREE_CODE (decl) != REFERENCE_TYPE, 148);
7317 DECL_INITIAL (decl) = init;
7319 /* This will keep us from needing to worry about our obstacks. */
7320 my_friendly_assert (init != NULL_TREE, 149);
7323 else if (!DECL_EXTERNAL (decl) && TREE_CODE (type) == REFERENCE_TYPE)
7325 if (TREE_STATIC (decl))
7326 make_decl_rtl (decl, NULL_PTR, toplevel_bindings_p ());
7327 grok_reference_init (decl, type, init);
7332 if (TYPE_HAS_CONSTRUCTOR (type) || TYPE_NEEDS_CONSTRUCTING (type))
7334 if (TREE_CODE (type) == ARRAY_TYPE)
7335 init = digest_init (type, init, (tree *) 0);
7336 else if (TREE_CODE (init) == CONSTRUCTOR
7337 && TREE_HAS_CONSTRUCTOR (init))
7339 if (TYPE_NON_AGGREGATE_CLASS (type))
7341 cp_error ("`%D' must be initialized by constructor, not by `{...}'",
7343 init = error_mark_node;
7346 goto dont_use_constructor;
7351 dont_use_constructor:
7352 if (TREE_CODE (init) != TREE_VEC)
7353 init = store_init_value (decl, init);
7357 /* We must hide the initializer so that expand_decl
7358 won't try to do something it does not understand. */
7359 init = obscure_complex_init (decl, init);
7361 else if (DECL_EXTERNAL (decl))
7363 else if (TREE_CODE_CLASS (TREE_CODE (type)) == 't'
7364 && (IS_AGGR_TYPE (type) || TYPE_NEEDS_CONSTRUCTING (type)))
7366 tree core_type = strip_array_types (type);
7368 if (! TYPE_NEEDS_CONSTRUCTING (core_type))
7370 if (CLASSTYPE_READONLY_FIELDS_NEED_INIT (core_type))
7371 cp_error ("structure `%D' with uninitialized const members", decl);
7372 if (CLASSTYPE_REF_FIELDS_NEED_INIT (core_type))
7373 cp_error ("structure `%D' with uninitialized reference members",
7377 check_for_uninitialized_const_var (decl);
7379 if (TYPE_SIZE (type) != NULL_TREE
7380 && TYPE_NEEDS_CONSTRUCTING (type))
7381 init = obscure_complex_init (decl, NULL_TREE);
7385 check_for_uninitialized_const_var (decl);
7390 /* If DECL is not a local variable, give it RTL. */
7393 make_rtl_for_nonlocal_decl (decl, init, asmspec)
7396 const char *asmspec;
7401 type = TREE_TYPE (decl);
7402 toplev = toplevel_bindings_p ();
7404 /* Handle non-variables up front. */
7405 if (TREE_CODE (decl) != VAR_DECL)
7407 rest_of_decl_compilation (decl, asmspec, toplev, at_eof);
7411 /* Set the DECL_ASSEMBLER_NAME for the variable. */
7413 DECL_ASSEMBLER_NAME (decl) = get_identifier (asmspec);
7415 if (DECL_VIRTUAL_P (decl))
7416 make_decl_rtl (decl, NULL_PTR, toplev);
7417 else if (TREE_READONLY (decl)
7418 && DECL_INITIAL (decl) != NULL_TREE
7419 && DECL_INITIAL (decl) != error_mark_node
7420 && ! EMPTY_CONSTRUCTOR_P (DECL_INITIAL (decl)))
7422 DECL_INITIAL (decl) = save_expr (DECL_INITIAL (decl));
7424 if (toplev && ! TREE_PUBLIC (decl))
7426 /* If this is a static const, change its apparent linkage
7427 if it belongs to a #pragma interface. */
7428 if (!interface_unknown)
7430 TREE_PUBLIC (decl) = 1;
7431 DECL_EXTERNAL (decl) = interface_only;
7433 make_decl_rtl (decl, asmspec, toplev);
7436 rest_of_decl_compilation (decl, asmspec, toplev, at_eof);
7438 else if (DECL_LANG_SPECIFIC (decl) && DECL_IN_AGGR_P (decl))
7440 my_friendly_assert (TREE_STATIC (decl), 19990828);
7442 if (init == NULL_TREE
7443 #ifdef DEFAULT_STATIC_DEFS
7444 /* If this code is dead, then users must
7445 explicitly declare static member variables
7446 outside the class def'n as well. */
7447 && TYPE_NEEDS_CONSTRUCTING (type)
7451 DECL_EXTERNAL (decl) = 1;
7452 make_decl_rtl (decl, asmspec, 1);
7455 rest_of_decl_compilation (decl, asmspec, toplev, at_eof);
7457 else if (TREE_CODE (CP_DECL_CONTEXT (decl)) == NAMESPACE_DECL
7458 || (TREE_CODE (decl) == VAR_DECL && TREE_STATIC (decl)))
7459 rest_of_decl_compilation (decl, asmspec, toplev, at_eof);
7462 /* Create RTL for the local static variable DECL. */
7465 make_rtl_for_local_static (decl)
7468 const char *asmspec = NULL;
7470 /* If we inlined this variable, we could see it's declaration
7472 if (DECL_RTL (decl))
7475 if (DECL_ASSEMBLER_NAME (decl) != DECL_NAME (decl))
7477 /* The only way this situaton can occur is if the
7478 user specified a name for this DECL using the
7479 `attribute' syntax. */
7480 asmspec = IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl));
7481 DECL_ASSEMBLER_NAME (decl) = DECL_NAME (decl);
7484 rest_of_decl_compilation (decl, asmspec, /*top_level=*/0, /*at_end=*/0);
7487 /* The old ARM scoping rules injected variables declared in the
7488 initialization statement of a for-statement into the surrounding
7489 scope. We support this usage, in order to be backward-compatible.
7490 DECL is a just-declared VAR_DECL; if necessary inject its
7491 declaration into the surrounding scope. */
7494 maybe_inject_for_scope_var (decl)
7497 if (current_binding_level->is_for_scope)
7499 struct binding_level *outer
7500 = current_binding_level->level_chain;
7502 /* Check to see if the same name is already bound at the outer
7503 level, either because it was directly declared, or because a
7504 dead for-decl got preserved. In either case, the code would
7505 not have been valid under the ARM scope rules, so clear
7506 is_for_scope for the current_binding_level.
7508 Otherwise, we need to preserve the temp slot for decl to last
7509 into the outer binding level. */
7512 = TREE_CHAIN (IDENTIFIER_BINDING (DECL_NAME (decl)));
7514 if (outer_binding && BINDING_LEVEL (outer_binding) == outer
7515 && (TREE_CODE (BINDING_VALUE (outer_binding))
7517 && DECL_DEAD_FOR_LOCAL (BINDING_VALUE (outer_binding)))
7519 BINDING_VALUE (outer_binding)
7520 = DECL_SHADOWED_FOR_VAR (BINDING_VALUE (outer_binding));
7521 current_binding_level->is_for_scope = 0;
7523 else if (DECL_IN_MEMORY_P (decl))
7524 preserve_temp_slots (DECL_RTL (decl));
7528 /* Generate code to initialize DECL (a local variable). */
7531 initialize_local_var (decl, init, flags)
7536 tree type = TREE_TYPE (decl);
7538 /* If the type is bogus, don't bother initializing the variable. */
7539 if (type == error_mark_node)
7542 if (DECL_SIZE (decl) == NULL_TREE && !TREE_STATIC (decl))
7544 /* If we used it already as memory, it must stay in memory. */
7545 DECL_INITIAL (decl) = NULL_TREE;
7546 TREE_ADDRESSABLE (decl) = TREE_USED (decl);
7549 /* Local statics are handled differently from ordinary automatic
7551 if (TREE_STATIC (decl))
7553 if (TYPE_NEEDS_CONSTRUCTING (type) || init != NULL_TREE
7554 || TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type))
7555 expand_static_init (decl, init);
7559 if (DECL_SIZE (decl) && type != error_mark_node)
7563 /* Compute and store the initial value. */
7564 already_used = TREE_USED (decl) || TREE_USED (type);
7566 if (init || TYPE_NEEDS_CONSTRUCTING (type))
7568 int saved_stmts_are_full_exprs_p;
7570 emit_line_note (DECL_SOURCE_FILE (decl),
7571 DECL_SOURCE_LINE (decl));
7572 saved_stmts_are_full_exprs_p = stmts_are_full_exprs_p;
7573 stmts_are_full_exprs_p = 1;
7574 finish_expr_stmt (build_aggr_init (decl, init, flags));
7575 stmts_are_full_exprs_p = saved_stmts_are_full_exprs_p;
7578 /* Set this to 0 so we can tell whether an aggregate which was
7579 initialized was ever used. Don't do this if it has a
7580 destructor, so we don't complain about the 'resource
7581 allocation is initialization' idiom. Now set
7582 attribute((unused)) on types so decls of that type will be
7583 marked used. (see TREE_USED, above.) */
7584 if (TYPE_NEEDS_CONSTRUCTING (type)
7586 && TYPE_HAS_TRIVIAL_DESTRUCTOR (type)
7587 && DECL_NAME (decl))
7588 TREE_USED (decl) = 0;
7589 else if (already_used)
7590 TREE_USED (decl) = 1;
7594 /* Generate code to destroy DECL (a local variable). */
7597 destroy_local_var (decl)
7600 tree type = TREE_TYPE (decl);
7603 /* Only variables get cleaned up. */
7604 if (TREE_CODE (decl) != VAR_DECL)
7607 /* And only things with destructors need cleaning up. */
7608 if (TYPE_HAS_TRIVIAL_DESTRUCTOR (type))
7611 if (TREE_CODE (decl) == VAR_DECL &&
7612 (DECL_EXTERNAL (decl) || TREE_STATIC (decl)))
7613 /* We don't clean up things that aren't defined in this
7614 translation unit, or that need a static cleanup. The latter
7615 are handled by finish_file. */
7618 /* Compute the cleanup. */
7619 cleanup = maybe_build_cleanup (decl);
7621 /* Record the cleanup required for this declaration. */
7622 if (DECL_SIZE (decl) && TREE_TYPE (decl) != error_mark_node
7624 finish_decl_cleanup (decl, cleanup);
7627 /* Let the back-end know about DECL. */
7630 emit_local_var (decl)
7633 /* Create RTL for this variable. */
7634 if (DECL_RTL (decl))
7635 /* Only a RESULT_DECL should have non-NULL RTL when arriving here.
7636 All other local variables are assigned RTL in this function. */
7637 my_friendly_assert (TREE_CODE (decl) == RESULT_DECL,
7641 if (DECL_ASSEMBLER_NAME (decl) != DECL_NAME (decl))
7642 /* The user must have specified an assembler name for this
7643 variable. Set that up now. */
7644 rest_of_decl_compilation
7645 (decl, IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl)),
7646 /*top_level=*/0, /*at_end=*/0);
7651 /* Actually do the initialization. */
7652 expand_start_target_temps ();
7653 expand_decl_init (decl);
7654 expand_end_target_temps ();
7657 /* Finish processing of a declaration;
7658 install its line number and initial value.
7659 If the length of an array type is not known before,
7660 it must be determined now, from the initial value, or it is an error.
7662 INIT0 holds the value of an initializer that should be allowed to escape
7665 FLAGS is LOOKUP_ONLYCONVERTING if the = init syntax was used, else 0
7666 if the (init) syntax was used.
7668 For functions that take default parameters, DECL points to its
7669 "maximal" instantiation. `cp_finish_decl' must then also declared its
7670 subsequently lower and lower forms of instantiation, checking for
7671 ambiguity as it goes. This can be sped up later. */
7674 cp_finish_decl (decl, init, asmspec_tree, flags)
7680 tree ttype = NULL_TREE;
7681 const char *asmspec = NULL;
7682 int was_readonly = 0;
7687 error ("assignment (not initialization) in declaration");
7691 /* If a name was specified, get the string. */
7693 asmspec = TREE_STRING_POINTER (asmspec_tree);
7695 if (init && TREE_CODE (init) == NAMESPACE_DECL)
7697 cp_error ("cannot initialize `%D' to namespace `%D'",
7702 if (current_class_type
7703 && CP_DECL_CONTEXT (decl) == current_class_type
7704 && TYPE_BEING_DEFINED (current_class_type)
7705 && (DECL_INITIAL (decl) || init))
7706 DECL_DEFINED_IN_CLASS_P (decl) = 1;
7708 if (TREE_CODE (decl) == VAR_DECL
7709 && DECL_CONTEXT (decl)
7710 && TREE_CODE (DECL_CONTEXT (decl)) == NAMESPACE_DECL
7711 && DECL_CONTEXT (decl) != current_namespace
7714 /* Leave the namespace of the object. */
7715 pop_decl_namespace ();
7718 type = TREE_TYPE (decl);
7720 if (type == error_mark_node)
7723 /* Add this declaration to the statement-tree. */
7724 if (building_stmt_tree () && at_function_scope_p ())
7725 add_decl_stmt (decl);
7727 if (TYPE_HAS_MUTABLE_P (type))
7728 TREE_READONLY (decl) = 0;
7730 if (processing_template_decl)
7732 if (init && DECL_INITIAL (decl))
7733 DECL_INITIAL (decl) = init;
7737 /* Parameters are handled by store_parm_decls, not cp_finish_decl. */
7738 my_friendly_assert (TREE_CODE (decl) != PARM_DECL, 19990828);
7740 /* Take care of TYPE_DECLs up front. */
7741 if (TREE_CODE (decl) == TYPE_DECL)
7743 if (init && DECL_INITIAL (decl))
7745 /* typedef foo = bar; store the type of bar as the type of foo. */
7746 TREE_TYPE (decl) = type = TREE_TYPE (init);
7747 DECL_INITIAL (decl) = init = NULL_TREE;
7749 if (type != error_mark_node
7750 && IS_AGGR_TYPE (type) && DECL_NAME (decl))
7752 if (TREE_TYPE (DECL_NAME (decl)) && TREE_TYPE (decl) != type)
7753 cp_warning ("shadowing previous type declaration of `%#D'", decl);
7754 set_identifier_type_value (DECL_NAME (decl), type);
7755 CLASSTYPE_GOT_SEMICOLON (type) = 1;
7757 GNU_xref_decl (current_function_decl, decl);
7759 /* If we have installed this as the canonical typedef for this
7760 type, and that type has not been defined yet, delay emitting
7761 the debug information for it, as we will emit it later. */
7762 if (TYPE_MAIN_DECL (TREE_TYPE (decl)) == decl
7763 && TYPE_SIZE (TREE_TYPE (decl)) == NULL_TREE)
7764 TYPE_DECL_SUPPRESS_DEBUG (decl) = 1;
7766 rest_of_decl_compilation (decl, NULL_PTR,
7767 DECL_CONTEXT (decl) == NULL_TREE, at_eof);
7771 if (TREE_CODE (decl) != FUNCTION_DECL)
7772 ttype = target_type (type);
7774 if (! DECL_EXTERNAL (decl) && TREE_READONLY (decl)
7775 && TYPE_NEEDS_CONSTRUCTING (type))
7777 /* Currently, GNU C++ puts constants in text space, making them
7778 impossible to initialize. In the future, one would hope for
7779 an operating system which understood the difference between
7780 initialization and the running of a program. */
7782 TREE_READONLY (decl) = 0;
7785 if (TREE_CODE (decl) == FIELD_DECL && asmspec)
7787 /* This must override the asm specifier which was placed by
7788 grokclassfn. Lay this out fresh. */
7789 DECL_RTL (TREE_TYPE (decl)) = NULL_RTX;
7790 DECL_ASSEMBLER_NAME (decl) = get_identifier (asmspec);
7791 make_decl_rtl (decl, asmspec, 0);
7794 /* Deduce size of array from initialization, if not already known. */
7795 maybe_deduce_size_from_array_init (decl, init);
7796 init = check_initializer (decl, init);
7798 GNU_xref_decl (current_function_decl, decl);
7800 if (TREE_CODE (decl) == VAR_DECL)
7801 layout_var_decl (decl);
7803 /* Output the assembler code and/or RTL code for variables and functions,
7804 unless the type is an undefined structure or union.
7805 If not, it will get done when the type is completed. */
7806 if (TREE_CODE (decl) == VAR_DECL || TREE_CODE (decl) == FUNCTION_DECL
7807 || TREE_CODE (decl) == RESULT_DECL)
7809 if (TREE_CODE (decl) == VAR_DECL)
7810 maybe_commonize_var (decl);
7812 make_rtl_for_nonlocal_decl (decl, init, asmspec);
7814 if (TREE_CODE (type) == FUNCTION_TYPE
7815 || TREE_CODE (type) == METHOD_TYPE)
7816 abstract_virtuals_error (decl,
7817 strip_array_types (TREE_TYPE (type)));
7819 abstract_virtuals_error (decl, strip_array_types (type));
7821 if (TREE_CODE (decl) == FUNCTION_DECL)
7823 else if (DECL_EXTERNAL (decl)
7824 && ! (DECL_LANG_SPECIFIC (decl)
7825 && DECL_NOT_REALLY_EXTERN (decl)))
7828 DECL_INITIAL (decl) = init;
7830 else if (TREE_CODE (CP_DECL_CONTEXT (decl)) == FUNCTION_DECL)
7832 /* This is a local declaration. */
7833 if (doing_semantic_analysis_p ())
7834 maybe_inject_for_scope_var (decl);
7835 /* Initialize the local variable. But, if we're building a
7836 statement-tree, we'll do the initialization when we
7838 if (processing_template_decl)
7840 if (init || DECL_INITIAL (decl) == error_mark_node)
7841 DECL_INITIAL (decl) = init;
7845 /* If we're not building RTL, then we need to do so
7847 if (!building_stmt_tree ())
7848 emit_local_var (decl);
7849 /* Initialize the variable. */
7850 initialize_local_var (decl, init, flags);
7851 /* Clean up the variable. */
7852 destroy_local_var (decl);
7855 else if (TREE_STATIC (decl) && type != error_mark_node)
7857 /* Cleanups for static variables are handled by `finish_file'. */
7858 if (TYPE_NEEDS_CONSTRUCTING (type) || init != NULL_TREE
7859 || TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type))
7860 expand_static_init (decl, init);
7864 /* Undo call to `pushclass' that was done in `start_decl'
7865 due to initialization of qualified member variable.
7866 I.e., Foo::x = 10; */
7868 tree context = CP_DECL_CONTEXT (decl);
7870 && TREE_CODE_CLASS (TREE_CODE (context)) == 't'
7871 && (TREE_CODE (decl) == VAR_DECL
7872 /* We also have a pushclass done that we need to undo here
7873 if we're at top level and declare a method. */
7874 || TREE_CODE (decl) == FUNCTION_DECL)
7875 /* If size hasn't been set, we're still defining it,
7876 and therefore inside the class body; don't pop
7877 the binding level.. */
7878 && TYPE_SIZE (context) != NULL_TREE
7879 && context == current_class_type)
7880 pop_nested_class ();
7887 TREE_READONLY (decl) = 1;
7890 /* This is here for a midend callback from c-common.c */
7893 finish_decl (decl, init, asmspec_tree)
7897 cp_finish_decl (decl, init, asmspec_tree, 0);
7900 /* Returns a declaration for a VAR_DECL as if:
7902 extern "C" TYPE NAME;
7904 had been seen. Used to create compiler-generated global
7908 declare_global_var (name, type)
7914 push_to_top_level ();
7915 decl = build_decl (VAR_DECL, name, type);
7916 TREE_PUBLIC (decl) = 1;
7917 DECL_EXTERNAL (decl) = 1;
7918 DECL_ARTIFICIAL (decl) = 1;
7920 cp_finish_decl (decl, NULL_TREE, NULL_TREE, 0);
7921 pop_from_top_level ();
7926 /* Returns a pointer to the `atexit' function. Note that if
7927 FLAG_USE_CXA_ATEXIT is non-zero, then this will actually be the new
7928 `__cxa_atexit' function specified in the IA64 C++ ABI. */
7942 if (flag_use_cxa_atexit)
7944 /* The declaration for `__cxa_atexit' is:
7946 int __cxa_atexit (void (*)(void *), void *, void *)
7948 We build up the argument types and then then function type
7951 /* First, build the pointer-to-function type for the first
7953 arg_types = tree_cons (NULL_TREE, ptr_type_node, void_list_node);
7954 fn_type = build_function_type (void_type_node, arg_types);
7955 fn_ptr_type = build_pointer_type (fn_type);
7956 /* Then, build the rest of the argument types. */
7957 arg_types = tree_cons (NULL_TREE, ptr_type_node, void_list_node);
7958 arg_types = tree_cons (NULL_TREE, ptr_type_node, arg_types);
7959 arg_types = tree_cons (NULL_TREE, fn_ptr_type, arg_types);
7960 /* And the final __cxa_atexit type. */
7961 fn_type = build_function_type (integer_type_node, arg_types);
7962 fn_ptr_type = build_pointer_type (fn_type);
7963 name = "__cxa_atexit";
7967 /* The declaration for `atexit' is:
7969 int atexit (void (*)());
7971 We build up the argument types and then then function type
7973 fn_type = build_function_type (void_type_node, void_list_node);
7974 fn_ptr_type = build_pointer_type (fn_type);
7975 arg_types = tree_cons (NULL_TREE, fn_ptr_type, void_list_node);
7976 /* Build the final atexit type. */
7977 fn_type = build_function_type (integer_type_node, arg_types);
7981 /* Now, build the function declaration. */
7982 push_lang_context (lang_name_c);
7983 atexit_fndecl = define_function (name, fn_type, /*pfn=*/0, NULL_PTR);
7984 mark_used (atexit_fndecl);
7985 pop_lang_context ();
7986 atexit_node = default_conversion (atexit_fndecl);
7991 /* Returns the __dso_handle VAR_DECL. */
7994 get_dso_handle_node ()
7996 if (dso_handle_node)
7997 return dso_handle_node;
7999 /* Declare the variable. */
8000 dso_handle_node = declare_global_var (get_identifier ("__dso_handle"),
8003 return dso_handle_node;
8006 /* Begin a new function with internal linkage whose job will be simply
8007 to destroy some particular variable. */
8012 static int counter = 0;
8013 int old_interface_unknown = interface_unknown;
8019 push_to_top_level ();
8021 /* No need to mangle this. */
8022 push_lang_context (lang_name_c);
8024 interface_unknown = 1;
8026 /* Build the parameter-types. */
8027 parmtypes = void_list_node;
8028 /* Functions passed to __cxa_atexit take an additional parameter.
8029 We'll just ignore it. After we implement the new calling
8030 convention for destructors, we can eliminate the use of
8031 additional cleanup functions entirely in the -fnew-abi case. */
8032 if (flag_use_cxa_atexit)
8033 parmtypes = tree_cons (NULL_TREE, ptr_type_node, parmtypes);
8034 /* Build the function type itself. */
8035 fntype = build_function_type (void_type_node, parmtypes);
8036 /* Build the name of the function. */
8037 sprintf (name, "__tcf_%d", counter++);
8038 /* Build the function declaration. */
8039 fndecl = build_lang_decl (FUNCTION_DECL, get_identifier (name), fntype);
8040 /* It's a function with internal linkage, generated by the
8042 TREE_PUBLIC (fndecl) = 0;
8043 DECL_ARTIFICIAL (fndecl) = 1;
8044 /* Build the parameter. */
8045 if (flag_use_cxa_atexit)
8049 parmdecl = build_decl (PARM_DECL, NULL_TREE, ptr_type_node);
8050 DECL_CONTEXT (parmdecl) = fndecl;
8051 DECL_ARG_TYPE (parmdecl) = ptr_type_node;
8052 TREE_USED (parmdecl) = 1;
8053 DECL_ARGUMENTS (fndecl) = parmdecl;
8057 start_function (/*specs=*/NULL_TREE, fndecl, NULL_TREE, SF_PRE_PARSED);
8060 interface_unknown = old_interface_unknown;
8062 pop_lang_context ();
8064 return current_function_decl;
8067 /* Finish the cleanup function begun by start_cleanup_fn. */
8074 expand_body (finish_function (lineno, 0));
8076 pop_from_top_level ();
8079 /* Generate code to handle the destruction of DECL, an object with
8080 static storage duration. */
8083 register_dtor_fn (decl)
8091 int saved_flag_access_control;
8093 if (TYPE_HAS_TRIVIAL_DESTRUCTOR (TREE_TYPE (decl)))
8096 /* Call build_cleanup before we enter the anonymous function so that
8097 any access checks will be done relative to the current scope,
8098 rather than the scope of the anonymous function. */
8099 build_cleanup (decl);
8101 /* Now start the function. */
8102 cleanup = start_cleanup_fn ();
8104 /* Now, recompute the cleanup. It may contain SAVE_EXPRs that refer
8105 to the original function, rather than the anonymous one. That
8106 will make the back-end think that nested functions are in use,
8107 which causes confusion. */
8108 saved_flag_access_control = flag_access_control;
8109 flag_access_control = 0;
8110 fcall = build_cleanup (decl);
8111 flag_access_control = saved_flag_access_control;
8113 /* Create the body of the anonymous function. */
8114 compound_stmt = begin_compound_stmt (/*has_no_scope=*/0);
8115 finish_expr_stmt (fcall);
8116 finish_compound_stmt (/*has_no_scope=*/0, compound_stmt);
8119 /* Call atexit with the cleanup function. */
8120 mark_addressable (cleanup);
8121 cleanup = build_unary_op (ADDR_EXPR, cleanup, 0);
8122 if (flag_use_cxa_atexit)
8124 args = tree_cons (NULL_TREE, get_dso_handle_node (), NULL_TREE);
8125 args = tree_cons (NULL_TREE, null_pointer_node, args);
8126 args = tree_cons (NULL_TREE, cleanup, args);
8129 args = tree_cons (NULL_TREE, cleanup, NULL_TREE);
8130 finish_expr_stmt (build_function_call (get_atexit_node (), args));
8134 expand_static_init (decl, init)
8138 tree oldstatic = value_member (decl, static_aggregates);
8142 if (TREE_PURPOSE (oldstatic) && init != NULL_TREE)
8143 cp_error ("multiple initializations given for `%D'", decl);
8145 else if (! toplevel_bindings_p ())
8147 /* Emit code to perform this initialization but once. */
8154 /* Emit code to perform this initialization but once. This code
8157 static int temp = 0;
8159 // Do initialization.
8161 // Register variable for destruction at end of program.
8164 Note that the `temp' variable is only set to 1 *after* the
8165 initialization is complete. This ensures that an exception,
8166 thrown during the construction, will cause the variable to
8167 reinitialized when we pass through this code again, as per:
8171 If the initialization exits by throwing an exception, the
8172 initialization is not complete, so it will be tried again
8173 the next time control enters the declaration.
8175 In theory, this process should be thread-safe, too; multiple
8176 threads should not be able to initialize the variable more
8177 than once. We don't yet attempt to ensure thread-safety. */
8178 temp = get_temp_name (integer_type_node, 1);
8179 rest_of_decl_compilation (temp, NULL_PTR, 0, 0);
8181 /* Begin the conditional initialization. */
8182 if_stmt = begin_if_stmt ();
8183 finish_if_stmt_cond (build_binary_op (EQ_EXPR, temp,
8186 then_clause = begin_compound_stmt (/*has_no_scope=*/0);
8188 /* Do the initialization itself. */
8189 if (TYPE_NEEDS_CONSTRUCTING (TREE_TYPE (decl))
8190 || (init && TREE_CODE (init) == TREE_LIST))
8191 assignment = build_aggr_init (decl, init, 0);
8193 /* The initialization we're doing here is just a bitwise
8195 assignment = build (INIT_EXPR, TREE_TYPE (decl), decl, init);
8197 assignment = NULL_TREE;
8199 /* Once the assignment is complete, set TEMP to 1. Since the
8200 construction of the static object is complete at this point,
8201 we want to make sure TEMP is set to 1 even if a temporary
8202 constructed during the initialization throws an exception
8203 when it is destroyed. So, we combine the initialization and
8204 the assignment to TEMP into a single expression, ensuring
8205 that when we call finish_expr_stmt the cleanups will not be
8206 run until after TEMP is set to 1. */
8207 temp_init = build_modify_expr (temp, NOP_EXPR, integer_one_node);
8210 assignment = tree_cons (NULL_TREE, assignment,
8211 build_tree_list (NULL_TREE,
8213 assignment = build_compound_expr (assignment);
8216 assignment = temp_init;
8217 finish_expr_stmt (assignment);
8219 /* Use atexit to register a function for destroying this static
8221 register_dtor_fn (decl);
8223 finish_compound_stmt (/*has_no_scope=*/0, then_clause);
8224 finish_then_clause (if_stmt);
8228 static_aggregates = tree_cons (init, decl, static_aggregates);
8231 /* Finish the declaration of a catch-parameter. */
8234 start_handler_parms (declspecs, declarator)
8241 decl = grokdeclarator (declarator, declspecs, CATCHPARM,
8243 if (decl == NULL_TREE)
8244 error ("invalid catch parameter");
8253 /* Make TYPE a complete type based on INITIAL_VALUE.
8254 Return 0 if successful, 1 if INITIAL_VALUE can't be deciphered,
8255 2 if there was no information (in which case assume 0 if DO_DEFAULT). */
8258 complete_array_type (type, initial_value, do_default)
8259 tree type, initial_value;
8262 register tree maxindex = NULL_TREE;
8267 /* Note MAXINDEX is really the maximum index,
8268 one less than the size. */
8269 if (TREE_CODE (initial_value) == STRING_CST)
8272 = int_size_in_bytes (TREE_TYPE (TREE_TYPE (initial_value)));
8273 maxindex = build_int_2 ((TREE_STRING_LENGTH (initial_value)
8276 else if (TREE_CODE (initial_value) == CONSTRUCTOR)
8278 tree elts = CONSTRUCTOR_ELTS (initial_value);
8280 maxindex = ssize_int (-1);
8281 for (; elts; elts = TREE_CHAIN (elts))
8283 if (TREE_PURPOSE (elts))
8284 maxindex = TREE_PURPOSE (elts);
8286 maxindex = size_binop (PLUS_EXPR, maxindex, ssize_int (1));
8288 maxindex = copy_node (maxindex);
8292 /* Make an error message unless that happened already. */
8293 if (initial_value != error_mark_node)
8296 initial_value = NULL_TREE;
8298 /* Prevent further error messages. */
8299 maxindex = build_int_2 (0, 0);
8306 maxindex = build_int_2 (0, 0);
8315 domain = build_index_type (maxindex);
8316 TYPE_DOMAIN (type) = domain;
8318 if (! TREE_TYPE (maxindex))
8319 TREE_TYPE (maxindex) = domain;
8321 itype = TREE_TYPE (initial_value);
8324 if (itype && !TYPE_DOMAIN (itype))
8325 TYPE_DOMAIN (itype) = domain;
8326 /* The type of the main variant should never be used for arrays
8327 of different sizes. It should only ever be completed with the
8328 size of the array. */
8329 if (! TYPE_DOMAIN (TYPE_MAIN_VARIANT (type)))
8330 TYPE_DOMAIN (TYPE_MAIN_VARIANT (type)) = domain;
8333 /* Lay out the type now that we can get the real answer. */
8340 /* Return zero if something is declared to be a member of type
8341 CTYPE when in the context of CUR_TYPE. STRING is the error
8342 message to print in that case. Otherwise, quietly return 1. */
8345 member_function_or_else (ctype, cur_type, flags)
8346 tree ctype, cur_type;
8347 enum overload_flags flags;
8349 if (ctype && ctype != cur_type)
8351 if (flags == DTOR_FLAG)
8352 error ("destructor for alien class `%s' cannot be a member",
8353 TYPE_NAME_STRING (ctype));
8355 error ("constructor for alien class `%s' cannot be a member",
8356 TYPE_NAME_STRING (ctype));
8362 /* Subroutine of `grokdeclarator'. */
8364 /* Generate errors possibly applicable for a given set of specifiers.
8365 This is for ARM $7.1.2. */
8368 bad_specifiers (object, type, virtualp, quals, inlinep, friendp, raises)
8371 int virtualp, quals, friendp, raises, inlinep;
8374 cp_error ("`%D' declared as a `virtual' %s", object, type);
8376 cp_error ("`%D' declared as an `inline' %s", object, type);
8378 cp_error ("`const' and `volatile' function specifiers on `%D' invalid in %s declaration",
8381 cp_error_at ("`%D' declared as a friend", object);
8383 cp_error_at ("`%D' declared with an exception specification", object);
8386 /* CTYPE is class type, or null if non-class.
8387 TYPE is type this FUNCTION_DECL should have, either FUNCTION_TYPE
8389 DECLARATOR is the function's name.
8390 VIRTUALP is truthvalue of whether the function is virtual or not.
8391 FLAGS are to be passed through to `grokclassfn'.
8392 QUALS are qualifiers indicating whether the function is `const'
8394 RAISES is a list of exceptions that this function can raise.
8395 CHECK is 1 if we must find this method in CTYPE, 0 if we should
8396 not look, and -1 if we should not call `grokclassfn' at all.
8398 Returns `NULL_TREE' if something goes wrong, after issuing
8399 applicable error messages. */
8402 grokfndecl (ctype, type, declarator, orig_declarator, virtualp, flags, quals,
8403 raises, check, friendp, publicp, inlinep, funcdef_flag,
8404 template_count, in_namespace)
8407 tree orig_declarator;
8409 enum overload_flags flags;
8411 int check, friendp, publicp, inlinep, funcdef_flag, template_count;
8415 int staticp = ctype && TREE_CODE (type) == FUNCTION_TYPE;
8416 int has_default_arg = 0;
8420 cname = TREE_CODE (TYPE_NAME (ctype)) == TYPE_DECL
8421 ? TYPE_IDENTIFIER (ctype) : TYPE_NAME (ctype);
8427 type = build_exception_variant (type, raises);
8430 decl = build_lang_decl (FUNCTION_DECL, declarator, type);
8431 /* Propagate volatile out from type to decl. */
8432 if (TYPE_VOLATILE (type))
8433 TREE_THIS_VOLATILE (decl) = 1;
8435 /* If this decl has namespace scope, set that up. */
8437 set_decl_namespace (decl, in_namespace, friendp);
8438 else if (publicp && ! ctype)
8439 DECL_CONTEXT (decl) = FROB_CONTEXT (current_namespace);
8441 /* `main' and builtins have implicit 'C' linkage. */
8442 if ((MAIN_NAME_P (declarator)
8443 || (IDENTIFIER_LENGTH (declarator) > 10
8444 && IDENTIFIER_POINTER (declarator)[0] == '_'
8445 && IDENTIFIER_POINTER (declarator)[1] == '_'
8446 && strncmp (IDENTIFIER_POINTER (declarator)+2, "builtin_", 8) == 0))
8447 && current_lang_name == lang_name_cplusplus
8448 && ctype == NULL_TREE
8449 /* NULL_TREE means global namespace. */
8450 && DECL_CONTEXT (decl) == NULL_TREE)
8451 DECL_LANGUAGE (decl) = lang_c;
8453 /* Should probably propagate const out from type to decl I bet (mrs). */
8456 DECL_STATIC_FUNCTION_P (decl) = 1;
8457 DECL_CONTEXT (decl) = ctype;
8461 DECL_CONTEXT (decl) = ctype;
8463 if (ctype == NULL_TREE && DECL_MAIN_P (decl))
8465 if (processing_template_decl)
8466 error ("cannot declare `::main' to be a template");
8468 error ("cannot declare `::main' to be inline");
8470 error ("cannot declare `::main' to be static");
8475 /* Members of anonymous types and local classes have no linkage; make
8477 if (ctype && (ANON_AGGRNAME_P (TYPE_IDENTIFIER (ctype))
8478 || decl_function_context (TYPE_MAIN_DECL (ctype))))
8483 /* [basic.link]: A name with no linkage (notably, the name of a class
8484 or enumeration declared in a local scope) shall not be used to
8485 declare an entity with linkage.
8487 Only check this for public decls for now. */
8488 t = no_linkage_check (TREE_TYPE (decl));
8491 if (ANON_AGGRNAME_P (TYPE_IDENTIFIER (t)))
8493 if (DECL_LANGUAGE (decl) == lang_c)
8494 /* Allow this; it's pretty common in C. */;
8496 cp_pedwarn ("non-local function `%#D' uses anonymous type",
8500 cp_pedwarn ("non-local function `%#D' uses local type `%T'",
8505 TREE_PUBLIC (decl) = publicp;
8508 DECL_INTERFACE_KNOWN (decl) = 1;
8509 DECL_NOT_REALLY_EXTERN (decl) = 1;
8513 DECL_THIS_INLINE (decl) = DECL_INLINE (decl) = 1;
8515 DECL_EXTERNAL (decl) = 1;
8516 if (quals != NULL_TREE && TREE_CODE (type) == FUNCTION_TYPE)
8518 cp_error ("%smember function `%D' cannot have `%T' method qualifier",
8519 (ctype ? "static " : "non-"), decl, TREE_VALUE (quals));
8523 if (IDENTIFIER_OPNAME_P (DECL_NAME (decl)))
8524 grok_op_properties (decl, virtualp, check < 0);
8526 if (ctype && decl_function_context (decl))
8527 DECL_NO_STATIC_CHAIN (decl) = 1;
8529 for (t = TYPE_ARG_TYPES (TREE_TYPE (decl)); t; t = TREE_CHAIN (t))
8530 if (TREE_PURPOSE (t)
8531 && TREE_CODE (TREE_PURPOSE (t)) == DEFAULT_ARG)
8533 has_default_arg = 1;
8538 && TREE_CODE (orig_declarator) == TEMPLATE_ID_EXPR)
8542 ("defining explicit specialization `%D' in friend declaration",
8546 if (PROCESSING_REAL_TEMPLATE_DECL_P ())
8548 /* Something like `template <class T> friend void f<T>()'. */
8549 cp_error ("invalid use of template-id `%D' in declaration of primary template",
8555 /* A friend declaration of the form friend void f<>(). Record
8556 the information in the TEMPLATE_ID_EXPR. */
8557 SET_DECL_IMPLICIT_INSTANTIATION (decl);
8558 DECL_TEMPLATE_INFO (decl)
8559 = tree_cons (TREE_OPERAND (orig_declarator, 0),
8560 TREE_OPERAND (orig_declarator, 1),
8563 if (has_default_arg)
8565 cp_error ("default arguments are not allowed in declaration of friend template specialization `%D'",
8572 cp_error ("`inline' is not allowed in declaration of friend template specialization `%D'",
8579 if (has_default_arg)
8580 add_defarg_fn (decl);
8582 /* Plain overloading: will not be grok'd by grokclassfn. */
8583 if (! ctype && ! processing_template_decl
8584 && DECL_LANGUAGE (decl) != lang_c
8585 && (! DECL_USE_TEMPLATE (decl) || name_mangling_version < 1))
8586 set_mangled_name_for_decl (decl);
8589 /* Make the init_value nonzero so pushdecl knows this is not
8590 tentative. error_mark_node is replaced later with the BLOCK. */
8591 DECL_INITIAL (decl) = error_mark_node;
8593 /* Caller will do the rest of this. */
8597 if (flags == NO_SPECIAL && ctype && constructor_name (cname) == declarator)
8600 /* Just handle constructors here. We could do this
8601 inside the following if stmt, but I think
8602 that the code is more legible by breaking this
8603 case out. See comments below for what each of
8604 the following calls is supposed to do. */
8605 DECL_CONSTRUCTOR_P (decl) = 1;
8607 grokclassfn (ctype, decl, flags, quals);
8609 decl = check_explicit_specialization (orig_declarator, decl,
8611 2 * (funcdef_flag != 0) +
8612 4 * (friendp != 0));
8613 if (decl == error_mark_node)
8616 if ((! TYPE_FOR_JAVA (ctype) || check_java_method (decl))
8619 tmp = check_classfn (ctype, decl);
8621 if (tmp && TREE_CODE (tmp) == TEMPLATE_DECL)
8622 tmp = DECL_TEMPLATE_RESULT(tmp);
8624 if (tmp && DECL_ARTIFICIAL (tmp))
8625 cp_error ("definition of implicitly-declared `%D'", tmp);
8626 if (tmp && duplicate_decls (decl, tmp))
8629 if (! grok_ctor_properties (ctype, decl))
8636 /* Function gets the ugly name, field gets the nice one.
8637 This call may change the type of the function (because
8638 of default parameters)! */
8639 if (ctype != NULL_TREE)
8640 grokclassfn (ctype, decl, flags, quals);
8642 decl = check_explicit_specialization (orig_declarator, decl,
8644 2 * (funcdef_flag != 0) +
8645 4 * (friendp != 0));
8646 if (decl == error_mark_node)
8649 if (ctype != NULL_TREE
8650 && (! TYPE_FOR_JAVA (ctype) || check_java_method (decl))
8653 tmp = check_classfn (ctype, decl);
8655 if (tmp && TREE_CODE (tmp) == TEMPLATE_DECL)
8656 tmp = DECL_TEMPLATE_RESULT (tmp);
8658 if (tmp && DECL_STATIC_FUNCTION_P (tmp)
8659 && TREE_CODE (TREE_TYPE (decl)) == METHOD_TYPE)
8661 /* Remove the `this' parm added by grokclassfn.
8662 XXX Isn't this done in start_function, too? */
8663 revert_static_member_fn (&decl, NULL, NULL);
8664 last_function_parms = TREE_CHAIN (last_function_parms);
8666 if (tmp && DECL_ARTIFICIAL (tmp))
8667 cp_error ("definition of implicitly-declared `%D'", tmp);
8670 /* Attempt to merge the declarations. This can fail, in
8671 the case of some illegal specialization declarations. */
8672 if (!duplicate_decls (decl, tmp))
8673 cp_error ("no `%#D' member function declared in class `%T'",
8679 if (ctype == NULL_TREE || check)
8684 DECL_VIRTUAL_P (decl) = 1;
8685 if (DECL_VINDEX (decl) == NULL_TREE)
8686 DECL_VINDEX (decl) = error_mark_node;
8687 IDENTIFIER_VIRTUAL_P (DECL_NAME (decl)) = 1;
8694 grokvardecl (type, declarator, specbits_in, initialized, constp, in_namespace)
8697 RID_BIT_TYPE *specbits_in;
8703 RID_BIT_TYPE specbits;
8705 specbits = *specbits_in;
8707 if (TREE_CODE (type) == OFFSET_TYPE)
8709 /* If you declare a static member so that it
8710 can be initialized, the code will reach here. */
8711 tree basetype = TYPE_OFFSET_BASETYPE (type);
8712 type = TREE_TYPE (type);
8713 decl = build_lang_decl (VAR_DECL, declarator, type);
8714 DECL_CONTEXT (decl) = basetype;
8715 DECL_ASSEMBLER_NAME (decl) = build_static_name (basetype, declarator);
8722 context = in_namespace;
8723 else if (namespace_bindings_p () || RIDBIT_SETP (RID_EXTERN, specbits))
8724 context = current_namespace;
8726 context = NULL_TREE;
8728 if (processing_template_decl)
8729 /* If we're in a template, we need DECL_LANG_SPECIFIC so that
8730 we can call push_template_decl. */
8731 decl = build_lang_decl (VAR_DECL, declarator, type);
8733 decl = build_decl (VAR_DECL, declarator, type);
8736 set_decl_namespace (decl, context, 0);
8738 context = DECL_CONTEXT (decl);
8739 if (declarator && context && current_lang_name != lang_name_c)
8740 DECL_ASSEMBLER_NAME (decl) = build_static_name (context, declarator);
8744 set_decl_namespace (decl, in_namespace, 0);
8746 if (RIDBIT_SETP (RID_EXTERN, specbits))
8748 DECL_THIS_EXTERN (decl) = 1;
8749 DECL_EXTERNAL (decl) = !initialized;
8752 /* In class context, static means one per class,
8753 public access, and static storage. */
8754 if (DECL_CLASS_SCOPE_P (decl))
8756 TREE_PUBLIC (decl) = 1;
8757 TREE_STATIC (decl) = 1;
8758 DECL_EXTERNAL (decl) = 0;
8760 /* At top level, either `static' or no s.c. makes a definition
8761 (perhaps tentative), and absence of `static' makes it public. */
8762 else if (toplevel_bindings_p ())
8764 TREE_PUBLIC (decl) = (RIDBIT_NOTSETP (RID_STATIC, specbits)
8765 && (DECL_THIS_EXTERN (decl) || ! constp));
8766 TREE_STATIC (decl) = ! DECL_EXTERNAL (decl);
8768 /* Not at top level, only `static' makes a static definition. */
8771 TREE_STATIC (decl) = !! RIDBIT_SETP (RID_STATIC, specbits);
8772 TREE_PUBLIC (decl) = DECL_EXTERNAL (decl);
8775 if (TREE_PUBLIC (decl))
8777 /* [basic.link]: A name with no linkage (notably, the name of a class
8778 or enumeration declared in a local scope) shall not be used to
8779 declare an entity with linkage.
8781 Only check this for public decls for now. */
8782 tree t = no_linkage_check (TREE_TYPE (decl));
8785 if (ANON_AGGRNAME_P (TYPE_IDENTIFIER (t)))
8786 /* Ignore for now; `enum { foo } e' is pretty common. */;
8788 cp_pedwarn ("non-local variable `%#D' uses local type `%T'",
8796 /* Create and return a canonical pointer to member function type, for
8797 TYPE, which is a POINTER_TYPE to a METHOD_TYPE. */
8800 build_ptrmemfunc_type (type)
8806 tree unqualified_variant = NULL_TREE;
8808 /* If a canonical type already exists for this type, use it. We use
8809 this method instead of type_hash_canon, because it only does a
8810 simple equality check on the list of field members. */
8812 if ((t = TYPE_GET_PTRMEMFUNC_TYPE (type)))
8815 /* Make sure that we always have the unqualified pointer-to-member
8817 if (CP_TYPE_QUALS (type) != TYPE_UNQUALIFIED)
8819 = build_ptrmemfunc_type (TYPE_MAIN_VARIANT (type));
8821 t = make_aggr_type (RECORD_TYPE);
8822 /* Let the front-end know this is a pointer to member function... */
8823 TYPE_PTRMEMFUNC_FLAG (t) = 1;
8824 /* ... and not really an aggregate. */
8825 SET_IS_AGGR_TYPE (t, 0);
8829 u = make_aggr_type (UNION_TYPE);
8830 SET_IS_AGGR_TYPE (u, 0);
8831 fields[0] = build_lang_decl (FIELD_DECL, pfn_identifier, type);
8832 fields[1] = build_lang_decl (FIELD_DECL, delta2_identifier,
8834 finish_builtin_type (u, "__ptrmemfunc_type", fields, 1, ptr_type_node);
8835 TYPE_NAME (u) = NULL_TREE;
8837 fields[0] = build_lang_decl (FIELD_DECL, delta_identifier,
8839 fields[1] = build_lang_decl (FIELD_DECL, index_identifier,
8841 fields[2] = build_lang_decl (FIELD_DECL, pfn_or_delta2_identifier, u);
8842 finish_builtin_type (t, "__ptrmemfunc_type", fields, 2, ptr_type_node);
8846 fields[0] = build_lang_decl (FIELD_DECL, pfn_identifier, type);
8847 fields[1] = build_lang_decl (FIELD_DECL, delta_identifier,
8849 finish_builtin_type (t, "__ptrmemfunc_type", fields, 1, ptr_type_node);
8852 /* Zap out the name so that the back-end will give us the debugging
8853 information for this anonymous RECORD_TYPE. */
8854 TYPE_NAME (t) = NULL_TREE;
8856 /* If this is not the unqualified form of this pointer-to-member
8857 type, set the TYPE_MAIN_VARIANT for this type to be the
8858 unqualified type. Since they are actually RECORD_TYPEs that are
8859 not variants of each other, we must do this manually. */
8860 if (CP_TYPE_QUALS (type) != TYPE_UNQUALIFIED)
8862 t = build_qualified_type (t, CP_TYPE_QUALS (type));
8863 TYPE_MAIN_VARIANT (t) = unqualified_variant;
8864 TYPE_NEXT_VARIANT (t) = TYPE_NEXT_VARIANT (unqualified_variant);
8865 TYPE_NEXT_VARIANT (unqualified_variant) = t;
8868 /* Cache this pointer-to-member type so that we can find it again
8870 TYPE_SET_PTRMEMFUNC_TYPE (type, t);
8872 /* Seems to be wanted. */
8873 CLASSTYPE_GOT_SEMICOLON (t) = 1;
8878 /* DECL is a VAR_DECL defined in-class, whose TYPE is also given.
8879 Check to see that the definition is valid. Issue appropriate error
8880 messages. Return 1 if the definition is particularly bad, or 0
8884 check_static_variable_definition (decl, type)
8888 /* Motion 10 at San Diego: If a static const integral data member is
8889 initialized with an integral constant expression, the initializer
8890 may appear either in the declaration (within the class), or in
8891 the definition, but not both. If it appears in the class, the
8892 member is a member constant. The file-scope definition is always
8894 if (CLASS_TYPE_P (type) || TREE_CODE (type) == REFERENCE_TYPE)
8896 cp_error ("invalid in-class initialization of static data member of non-integral type `%T'",
8898 /* If we just return the declaration, crashes will sometimes
8899 occur. We therefore return void_type_node, as if this was a
8900 friend declaration, to cause callers to completely ignore
8901 this declaration. */
8904 else if (!CP_TYPE_CONST_P (type))
8905 cp_error ("ISO C++ forbids in-class initialization of non-const static member `%D'",
8907 else if (pedantic && !INTEGRAL_TYPE_P (type))
8908 cp_pedwarn ("ISO C++ forbids initialization of member constant `%D' of non-integral type `%T'", decl, type);
8913 /* Given the SIZE (i.e., number of elements) in an array, compute an
8914 appropriate index type for the array. If non-NULL, NAME is the
8915 name of the thing being declared. */
8918 compute_array_index_type (name, size)
8924 /* The size might be the result of a cast. */
8925 STRIP_TYPE_NOPS (size);
8927 /* It might be a const variable or enumeration constant. */
8928 if (TREE_READONLY_DECL_P (size))
8929 size = decl_constant_value (size);
8931 /* If this involves a template parameter, it will be a constant at
8932 instantiation time, but we don't know what the value is yet.
8933 Even if no template parameters are involved, we may an expression
8934 that is not a constant; we don't even simplify `1 + 2' when
8935 processing a template. */
8936 if (processing_template_decl)
8938 /* Resolve a qualified reference to an enumerator or static
8939 const data member of ours. */
8940 if (TREE_CODE (size) == SCOPE_REF
8941 && TREE_OPERAND (size, 0) == current_class_type)
8943 tree t = lookup_field (current_class_type,
8944 TREE_OPERAND (size, 1), 0, 0);
8949 return build_index_type (build_min (MINUS_EXPR, sizetype,
8950 size, integer_one_node));
8953 /* The array bound must be an integer type. */
8954 if (TREE_CODE (TREE_TYPE (size)) != INTEGER_TYPE
8955 && TREE_CODE (TREE_TYPE (size)) != ENUMERAL_TYPE
8956 && TREE_CODE (TREE_TYPE (size)) != BOOLEAN_TYPE)
8959 cp_error ("size of array `%D' has non-integer type", name);
8961 cp_error ("size of array has non-integer type");
8962 size = integer_one_node;
8965 /* Normally, the array-bound will be a constant. */
8966 if (TREE_CONSTANT (size))
8968 /* Check to see if the array bound overflowed. Make that an
8969 error, no matter how generous we're being. */
8970 int old_flag_pedantic_errors = flag_pedantic_errors;
8971 int old_pedantic = pedantic;
8972 pedantic = flag_pedantic_errors = 1;
8973 constant_expression_warning (size);
8974 pedantic = old_pedantic;
8975 flag_pedantic_errors = old_flag_pedantic_errors;
8977 /* An array must have a positive number of elements. */
8978 if (INT_CST_LT (size, integer_zero_node))
8981 cp_error ("size of array `%D' is negative", name);
8983 cp_error ("size of array is negative");
8984 size = integer_one_node;
8986 /* Except that an extension we allow zero-sized arrays. We
8987 always allow them in system headers because glibc uses
8989 else if (integer_zerop (size) && pedantic && !in_system_header)
8992 cp_pedwarn ("ISO C++ forbids zero-size array `%D'", name);
8994 cp_pedwarn ("ISO C++ forbids zero-size array");
8998 /* Compute the index of the largest element in the array. It is
8999 one less than the number of elements in the array. */
9001 = fold (build_binary_op (MINUS_EXPR,
9002 cp_convert (ssizetype, size),
9003 cp_convert (ssizetype,
9004 integer_one_node)));
9006 /* Check for variable-sized arrays. We allow such things as an
9007 extension, even though they are not allowed in ANSI/ISO C++. */
9008 if (!TREE_CONSTANT (itype))
9013 cp_pedwarn ("ISO C++ forbids variable-size array `%D'",
9016 cp_pedwarn ("ISO C++ forbids variable-size array");
9019 /* Create a variable-sized array index type. */
9020 itype = variable_size (itype);
9022 /* Make sure that there was no overflow when creating to a signed
9023 index type. (For example, on a 32-bit machine, an array with
9024 size 2^32 - 1 is too big.) */
9025 else if (TREE_OVERFLOW (itype))
9027 error ("overflow in array dimension");
9028 TREE_OVERFLOW (itype) = 0;
9031 /* Create and return the appropriate index type. */
9032 return build_index_type (itype);
9035 /* Returns an ARRAY_TYPE for an array with SIZE elements of the
9036 indicated TYPE. If non-NULL, NAME is the NAME of the declaration
9040 create_array_type_for_decl (name, type, size)
9045 tree itype = NULL_TREE;
9046 const char* error_msg;
9048 /* If things have already gone awry, bail now. */
9049 if (type == error_mark_node || size == error_mark_node)
9050 return error_mark_node;
9052 /* Assume that everything will go OK. */
9055 /* There are some types which cannot be array elements. */
9056 switch (TREE_CODE (type))
9059 error_msg = "array of void";
9063 error_msg = "array of functions";
9066 case REFERENCE_TYPE:
9067 error_msg = "array of references";
9071 error_msg = "array of data members";
9075 error_msg = "array of function members";
9082 /* If something went wrong, issue an error-message and return. */
9086 cp_error ("declaration of `%D' as %s", name, error_msg);
9088 cp_error ("creating %s", error_msg);
9090 return error_mark_node;
9095 The constant expressions that specify the bounds of the arrays
9096 can be omitted only for the first member of the sequence. */
9097 if (TREE_CODE (type) == ARRAY_TYPE && !TYPE_DOMAIN (type))
9099 cp_error ("declaration of `%D' as multidimensional array must have bounds for all dimensions except the first",
9102 return error_mark_node;
9105 /* Figure out the index type for the array. */
9107 itype = compute_array_index_type (name, size);
9109 return build_cplus_array_type (type, itype);
9112 /* Given declspecs and a declarator,
9113 determine the name and type of the object declared
9114 and construct a ..._DECL node for it.
9115 (In one case we can return a ..._TYPE node instead.
9116 For invalid input we sometimes return 0.)
9118 DECLSPECS is a chain of tree_list nodes whose value fields
9119 are the storage classes and type specifiers.
9121 DECL_CONTEXT says which syntactic context this declaration is in:
9122 NORMAL for most contexts. Make a VAR_DECL or FUNCTION_DECL or TYPE_DECL.
9123 FUNCDEF for a function definition. Like NORMAL but a few different
9124 error messages in each case. Return value may be zero meaning
9125 this definition is too screwy to try to parse.
9126 MEMFUNCDEF for a function definition. Like FUNCDEF but prepares to
9127 handle member functions (which have FIELD context).
9128 Return value may be zero meaning this definition is too screwy to
9130 PARM for a parameter declaration (either within a function prototype
9131 or before a function body). Make a PARM_DECL, or return void_type_node.
9132 CATCHPARM for a parameter declaration before a catch clause.
9133 TYPENAME if for a typename (in a cast or sizeof).
9134 Don't make a DECL node; just return the ..._TYPE node.
9135 FIELD for a struct or union field; make a FIELD_DECL.
9136 BITFIELD for a field with specified width.
9137 INITIALIZED is 1 if the decl has an initializer.
9139 ATTRLIST is a TREE_LIST node with prefix attributes in TREE_VALUE and
9140 normal attributes in TREE_PURPOSE, or NULL_TREE.
9142 In the TYPENAME case, DECLARATOR is really an abstract declarator.
9143 It may also be so in the PARM case, for a prototype where the
9144 argument type is specified but not the name.
9146 This function is where the complicated C meanings of `static'
9147 and `extern' are interpreted.
9149 For C++, if there is any monkey business to do, the function which
9150 calls this one must do it, i.e., prepending instance variables,
9151 renaming overloaded function names, etc.
9153 Note that for this C++, it is an error to define a method within a class
9154 which does not belong to that class.
9156 Except in the case where SCOPE_REFs are implicitly known (such as
9157 methods within a class being redundantly qualified),
9158 declarations which involve SCOPE_REFs are returned as SCOPE_REFs
9159 (class_name::decl_name). The caller must also deal with this.
9161 If a constructor or destructor is seen, and the context is FIELD,
9162 then the type gains the attribute TREE_HAS_x. If such a declaration
9163 is erroneous, NULL_TREE is returned.
9165 QUALS is used only for FUNCDEF and MEMFUNCDEF cases. For a member
9166 function, these are the qualifiers to give to the `this' pointer. We
9167 apply TYPE_QUAL_RESTRICT to the this ptr, not the object.
9169 May return void_type_node if the declarator turned out to be a friend.
9170 See grokfield for details. */
9172 enum return_types { return_normal, return_ctor, return_dtor, return_conversion };
9175 grokdeclarator (declarator, declspecs, decl_context, initialized, attrlist)
9178 enum decl_context decl_context;
9182 RID_BIT_TYPE specbits;
9185 tree type = NULL_TREE;
9191 int virtualp, explicitp, friendp, inlinep, staticp;
9192 int explicit_int = 0;
9193 int explicit_char = 0;
9194 int defaulted_int = 0;
9195 tree typedef_decl = NULL_TREE;
9197 tree typedef_type = NULL_TREE;
9198 int funcdef_flag = 0;
9199 enum tree_code innermost_code = ERROR_MARK;
9202 /* See the code below that used this. */
9203 tree decl_machine_attr = NULL_TREE;
9205 /* Set this to error_mark_node for FIELD_DECLs we could not handle properly.
9206 All FIELD_DECLs we build here have `init' put into their DECL_INITIAL. */
9207 tree init = NULL_TREE;
9209 /* Keep track of what sort of function is being processed
9210 so that we can warn about default return values, or explicit
9211 return values which do not match prescribed defaults. */
9212 enum return_types return_type = return_normal;
9214 tree dname = NULL_TREE;
9215 tree ctype = current_class_type;
9216 tree ctor_return_type = NULL_TREE;
9217 enum overload_flags flags = NO_SPECIAL;
9218 tree quals = NULL_TREE;
9219 tree raises = NULL_TREE;
9220 int template_count = 0;
9221 tree in_namespace = NULL_TREE;
9225 RIDBIT_RESET_ALL (specbits);
9226 if (decl_context == FUNCDEF)
9227 funcdef_flag = 1, decl_context = NORMAL;
9228 else if (decl_context == MEMFUNCDEF)
9229 funcdef_flag = -1, decl_context = FIELD;
9230 else if (decl_context == BITFIELD)
9231 bitfield = 1, decl_context = FIELD;
9233 /* Look inside a declarator for the name being declared
9234 and get it as a string, for an error message. */
9236 tree *next = &declarator;
9240 while (next && *next)
9243 switch (TREE_CODE (decl))
9246 /* For attributes. */
9247 next = &TREE_VALUE (decl);
9252 next = &TREE_OPERAND (decl, 0);
9255 case BIT_NOT_EXPR: /* For C++ destructors! */
9257 tree name = TREE_OPERAND (decl, 0);
9258 tree rename = NULL_TREE;
9260 my_friendly_assert (flags == NO_SPECIAL, 152);
9262 return_type = return_dtor;
9263 if (TREE_CODE (name) == TYPE_DECL)
9264 TREE_OPERAND (decl, 0) = name = constructor_name (name);
9265 my_friendly_assert (TREE_CODE (name) == IDENTIFIER_NODE, 153);
9266 if (ctype == NULL_TREE)
9268 if (current_class_type == NULL_TREE)
9270 error ("destructors must be member functions");
9275 tree t = constructor_name (current_class_name);
9282 tree t = constructor_name (ctype);
9289 cp_error ("destructor `%T' must match class name `%T'",
9291 TREE_OPERAND (decl, 0) = rename;
9297 case ADDR_EXPR: /* C++ reference declaration */
9302 innermost_code = TREE_CODE (decl);
9303 next = &TREE_OPERAND (decl, 0);
9307 if (parmlist_is_exprlist (CALL_DECLARATOR_PARMS (decl)))
9309 /* This is actually a variable declaration using
9310 constructor syntax. We need to call start_decl and
9311 cp_finish_decl so we can get the variable
9314 tree attributes, prefix_attributes;
9316 *next = TREE_OPERAND (decl, 0);
9317 init = CALL_DECLARATOR_PARMS (decl);
9321 attributes = TREE_PURPOSE (attrlist);
9322 prefix_attributes = TREE_VALUE (attrlist);
9326 attributes = NULL_TREE;
9327 prefix_attributes = NULL_TREE;
9330 decl = start_decl (declarator, declspecs, 1,
9331 attributes, prefix_attributes);
9332 decl_type_access_control (decl);
9335 /* Look for __unused__ attribute */
9336 if (TREE_USED (TREE_TYPE (decl)))
9337 TREE_USED (decl) = 1;
9338 finish_decl (decl, init, NULL_TREE);
9341 cp_error ("invalid declarator");
9344 innermost_code = TREE_CODE (decl);
9345 if (decl_context == FIELD && ctype == NULL_TREE)
9346 ctype = current_class_type;
9348 && TREE_OPERAND (decl, 0)
9349 && (TREE_CODE (TREE_OPERAND (decl, 0)) == TYPE_DECL
9350 && ((DECL_NAME (TREE_OPERAND (decl, 0))
9351 == constructor_name_full (ctype))
9352 || (DECL_NAME (TREE_OPERAND (decl, 0))
9353 == constructor_name (ctype)))))
9354 TREE_OPERAND (decl, 0) = constructor_name (ctype);
9355 next = &TREE_OPERAND (decl, 0);
9357 if (ctype != NULL_TREE
9358 && decl != NULL_TREE && flags != DTOR_FLAG
9359 && decl == constructor_name (ctype))
9361 return_type = return_ctor;
9362 ctor_return_type = ctype;
9367 case TEMPLATE_ID_EXPR:
9369 tree fns = TREE_OPERAND (decl, 0);
9371 if (TREE_CODE (fns) == LOOKUP_EXPR)
9372 fns = TREE_OPERAND (fns, 0);
9375 if (TREE_CODE (dname) == COMPONENT_REF)
9376 dname = TREE_OPERAND (dname, 1);
9377 if (TREE_CODE (dname) != IDENTIFIER_NODE)
9379 my_friendly_assert (is_overloaded_fn (dname),
9381 dname = DECL_NAME (get_first_fn (dname));
9386 case IDENTIFIER_NODE:
9387 if (TREE_CODE (decl) == IDENTIFIER_NODE)
9394 cp_error ("declarator-id missing; using reserved word `%D'",
9396 name = IDENTIFIER_POINTER (dname);
9398 if (! IDENTIFIER_OPNAME_P (dname)
9399 /* GNU/Linux headers use '__op'. Arrgh. */
9400 || (IDENTIFIER_TYPENAME_P (dname) && ! TREE_TYPE (dname)))
9401 name = IDENTIFIER_POINTER (dname);
9404 if (IDENTIFIER_TYPENAME_P (dname))
9406 my_friendly_assert (flags == NO_SPECIAL, 154);
9407 flags = TYPENAME_FLAG;
9408 ctor_return_type = TREE_TYPE (dname);
9409 return_type = return_conversion;
9411 name = operator_name_string (dname);
9418 /* Perform error checking, and decide on a ctype. */
9419 tree cname = TREE_OPERAND (decl, 0);
9420 if (cname == NULL_TREE)
9422 else if (TREE_CODE (cname) == NAMESPACE_DECL)
9425 in_namespace = TREE_OPERAND (decl, 0);
9426 TREE_OPERAND (decl, 0) = NULL_TREE;
9428 else if (! is_aggr_type (cname, 1))
9429 TREE_OPERAND (decl, 0) = NULL_TREE;
9430 /* Must test TREE_OPERAND (decl, 1), in case user gives
9431 us `typedef (class::memfunc)(int); memfunc *memfuncptr;' */
9432 else if (TREE_OPERAND (decl, 1)
9433 && TREE_CODE (TREE_OPERAND (decl, 1)) == INDIRECT_REF)
9435 else if (TREE_CODE (cname) == TEMPLATE_TYPE_PARM
9436 || TREE_CODE (cname) == TEMPLATE_TEMPLATE_PARM)
9438 cp_error ("`%T::%D' is not a valid declarator", cname,
9439 TREE_OPERAND (decl, 1));
9440 cp_error (" perhaps you want `typename %T::%D' to make it a type",
9441 cname, TREE_OPERAND (decl, 1));
9442 return void_type_node;
9444 else if (ctype == NULL_TREE)
9446 else if (TREE_COMPLEXITY (decl) == current_class_depth)
9447 TREE_OPERAND (decl, 0) = ctype;
9450 if (! UNIQUELY_DERIVED_FROM_P (cname, ctype))
9452 cp_error ("type `%T' is not derived from type `%T'",
9454 TREE_OPERAND (decl, 0) = NULL_TREE;
9460 if (ctype && TREE_CODE (TREE_OPERAND (decl, 1)) == TYPE_DECL
9461 && ((DECL_NAME (TREE_OPERAND (decl, 1))
9462 == constructor_name_full (ctype))
9463 || (DECL_NAME (TREE_OPERAND (decl, 1))
9464 == constructor_name (ctype))))
9465 TREE_OPERAND (decl, 1) = constructor_name (ctype);
9466 next = &TREE_OPERAND (decl, 1);
9470 if (TREE_CODE (decl) == IDENTIFIER_NODE
9471 && constructor_name (ctype) == decl)
9473 return_type = return_ctor;
9474 ctor_return_type = ctype;
9476 else if (TREE_CODE (decl) == BIT_NOT_EXPR
9477 && TREE_CODE (TREE_OPERAND (decl, 0)) == IDENTIFIER_NODE
9478 && (constructor_name (ctype) == TREE_OPERAND (decl, 0)
9479 || constructor_name_full (ctype) == TREE_OPERAND (decl, 0)))
9481 return_type = return_dtor;
9482 ctor_return_type = ctype;
9484 TREE_OPERAND (decl, 0) = constructor_name (ctype);
9485 next = &TREE_OPERAND (decl, 0);
9496 /* Parse error puts this typespec where
9497 a declarator should go. */
9498 cp_error ("`%T' specified as declarator-id", DECL_NAME (decl));
9499 if (TREE_TYPE (decl) == current_class_type)
9500 cp_error (" perhaps you want `%T' for a constructor",
9501 current_class_name);
9502 dname = DECL_NAME (decl);
9503 name = IDENTIFIER_POINTER (dname);
9505 /* Avoid giving two errors for this. */
9506 IDENTIFIER_CLASS_VALUE (dname) = NULL_TREE;
9508 declspecs = tree_cons (NULL_TREE, integer_type_node, declspecs);
9514 cp_compiler_error ("`%D' as declarator", decl);
9515 return 0; /* We used to do a 155 abort here. */
9520 /* A function definition's declarator must have the form of
9521 a function declarator. */
9523 if (funcdef_flag && innermost_code != CALL_EXPR)
9526 if (((dname && IDENTIFIER_OPNAME_P (dname)) || flags == TYPENAME_FLAG)
9527 && innermost_code != CALL_EXPR
9528 && ! (ctype && declspecs == NULL_TREE))
9530 cp_error ("declaration of `%D' as non-function", dname);
9531 return void_type_node;
9534 /* Anything declared one level down from the top level
9535 must be one of the parameters of a function
9536 (because the body is at least two levels down). */
9538 /* This heuristic cannot be applied to C++ nodes! Fixed, however,
9539 by not allowing C++ class definitions to specify their parameters
9540 with xdecls (must be spec.d in the parmlist).
9542 Since we now wait to push a class scope until we are sure that
9543 we are in a legitimate method context, we must set oldcname
9544 explicitly (since current_class_name is not yet alive).
9546 We also want to avoid calling this a PARM if it is in a namespace. */
9548 if (decl_context == NORMAL && !toplevel_bindings_p ())
9550 struct binding_level *b = current_binding_level;
9551 current_binding_level = b->level_chain;
9552 if (current_binding_level != 0 && toplevel_bindings_p ())
9553 decl_context = PARM;
9554 current_binding_level = b;
9558 name = decl_context == PARM ? "parameter" : "type name";
9560 /* Look through the decl specs and record which ones appear.
9561 Some typespecs are defined as built-in typenames.
9562 Others, the ones that are modifiers of other types,
9563 are represented by bits in SPECBITS: set the bits for
9564 the modifiers that appear. Storage class keywords are also in SPECBITS.
9566 If there is a typedef name or a type, store the type in TYPE.
9567 This includes builtin typedefs such as `int'.
9569 Set EXPLICIT_INT if the type is `int' or `char' and did not
9570 come from a user typedef.
9572 Set LONGLONG if `long' is mentioned twice.
9574 For C++, constructors and destructors have their own fast treatment. */
9576 for (spec = declspecs; spec; spec = TREE_CHAIN (spec))
9581 /* Certain parse errors slip through. For example,
9582 `int class;' is not caught by the parser. Try
9583 weakly to recover here. */
9584 if (TREE_CODE (spec) != TREE_LIST)
9587 id = TREE_VALUE (spec);
9589 if (TREE_CODE (id) == IDENTIFIER_NODE)
9591 if (id == ridpointers[(int) RID_INT]
9592 || id == ridpointers[(int) RID_CHAR]
9593 || id == ridpointers[(int) RID_BOOL]
9594 || id == ridpointers[(int) RID_WCHAR])
9598 if (id == ridpointers[(int) RID_BOOL])
9599 error ("`bool' is now a keyword");
9601 cp_error ("extraneous `%T' ignored", id);
9605 if (id == ridpointers[(int) RID_INT])
9607 else if (id == ridpointers[(int) RID_CHAR])
9609 type = TREE_TYPE (IDENTIFIER_GLOBAL_VALUE (id));
9613 /* C++ aggregate types. */
9614 if (IDENTIFIER_HAS_TYPE_VALUE (id))
9617 cp_error ("multiple declarations `%T' and `%T'", type, id);
9619 type = IDENTIFIER_TYPE_VALUE (id);
9623 for (i = (int) RID_FIRST_MODIFIER; i <= (int) RID_LAST_MODIFIER; i++)
9625 if (ridpointers[i] == id)
9627 if (i == (int) RID_LONG && RIDBIT_SETP (i, specbits))
9629 if (pedantic && ! in_system_header && warn_long_long)
9630 pedwarn ("ISO C++ does not support `long long'");
9632 error ("`long long long' is too long for GCC");
9636 else if (RIDBIT_SETP (i, specbits))
9637 pedwarn ("duplicate `%s'", IDENTIFIER_POINTER (id));
9638 RIDBIT_SET (i, specbits);
9643 /* C++ aggregate types. */
9644 else if (TREE_CODE (id) == TYPE_DECL || TREE_CODE (id) == TEMPLATE_DECL)
9647 cp_error ("multiple declarations `%T' and `%T'", type,
9651 type = TREE_TYPE (id);
9652 TREE_VALUE (spec) = type;
9657 error ("two or more data types in declaration of `%s'", name);
9658 else if (TREE_CODE (id) == IDENTIFIER_NODE)
9660 register tree t = lookup_name (id, 1);
9661 if (!t || TREE_CODE (t) != TYPE_DECL)
9662 error ("`%s' fails to be a typedef or built in type",
9663 IDENTIFIER_POINTER (id));
9666 type = TREE_TYPE (t);
9668 /* See the code below that used this. */
9669 decl_machine_attr = DECL_MACHINE_ATTRIBUTES (id);
9674 else if (id != error_mark_node)
9675 /* Can't change CLASS nodes into RECORD nodes here! */
9681 typedef_type = type;
9683 /* No type at all: default to `int', and set DEFAULTED_INT
9684 because it was not a user-defined typedef. */
9686 if (type == NULL_TREE
9687 && (RIDBIT_SETP (RID_SIGNED, specbits)
9688 || RIDBIT_SETP (RID_UNSIGNED, specbits)
9689 || RIDBIT_SETP (RID_LONG, specbits)
9690 || RIDBIT_SETP (RID_SHORT, specbits)))
9692 /* These imply 'int'. */
9693 type = integer_type_node;
9697 if (type == NULL_TREE)
9700 if (return_type == return_dtor)
9701 type = void_type_node;
9702 else if (return_type == return_ctor)
9703 type = build_pointer_type (ctor_return_type);
9704 else if (return_type == return_conversion)
9705 type = ctor_return_type;
9708 /* We handle `main' specially here, because 'main () { }' is so
9709 common. With no options, it is allowed. With -Wreturn-type,
9710 it is a warning. It is only an error with -pedantic-errors. */
9711 int is_main = (funcdef_flag
9712 && MAIN_NAME_P (dname)
9713 && ctype == NULL_TREE
9714 && in_namespace == NULL_TREE
9715 && current_namespace == global_namespace);
9717 if (in_system_header || flag_ms_extensions)
9718 /* Allow it, sigh. */;
9719 else if (pedantic || ! is_main)
9720 cp_pedwarn ("ISO C++ forbids declaration of `%s' with no type",
9722 else if (warn_return_type)
9723 cp_warning ("ISO C++ forbids declaration of `%s' with no type",
9726 type = integer_type_node;
9729 else if (return_type == return_dtor)
9731 error ("return type specification for destructor invalid");
9732 type = void_type_node;
9734 else if (return_type == return_ctor)
9736 error ("return type specification for constructor invalid");
9737 type = build_pointer_type (ctor_return_type);
9739 else if (return_type == return_conversion)
9741 if (!same_type_p (type, ctor_return_type))
9742 cp_error ("operator `%T' declared to return `%T'",
9743 ctor_return_type, type);
9745 cp_pedwarn ("return type specified for `operator %T'",
9748 type = ctor_return_type;
9753 /* Now process the modifiers that were specified
9754 and check for invalid combinations. */
9756 /* Long double is a special combination. */
9758 if (RIDBIT_SETP (RID_LONG, specbits)
9759 && TYPE_MAIN_VARIANT (type) == double_type_node)
9761 RIDBIT_RESET (RID_LONG, specbits);
9762 type = build_qualified_type (long_double_type_node,
9763 CP_TYPE_QUALS (type));
9766 /* Check all other uses of type modifiers. */
9768 if (RIDBIT_SETP (RID_UNSIGNED, specbits)
9769 || RIDBIT_SETP (RID_SIGNED, specbits)
9770 || RIDBIT_SETP (RID_LONG, specbits)
9771 || RIDBIT_SETP (RID_SHORT, specbits))
9775 if (TREE_CODE (type) == REAL_TYPE)
9776 error ("short, signed or unsigned invalid for `%s'", name);
9777 else if (TREE_CODE (type) != INTEGER_TYPE)
9778 error ("long, short, signed or unsigned invalid for `%s'", name);
9779 else if (RIDBIT_SETP (RID_LONG, specbits)
9780 && RIDBIT_SETP (RID_SHORT, specbits))
9781 error ("long and short specified together for `%s'", name);
9782 else if ((RIDBIT_SETP (RID_LONG, specbits)
9783 || RIDBIT_SETP (RID_SHORT, specbits))
9785 error ("long or short specified with char for `%s'", name);
9786 else if ((RIDBIT_SETP (RID_LONG, specbits)
9787 || RIDBIT_SETP (RID_SHORT, specbits))
9788 && TREE_CODE (type) == REAL_TYPE)
9789 error ("long or short specified with floating type for `%s'", name);
9790 else if (RIDBIT_SETP (RID_SIGNED, specbits)
9791 && RIDBIT_SETP (RID_UNSIGNED, specbits))
9792 error ("signed and unsigned given together for `%s'", name);
9796 if (!explicit_int && !defaulted_int && !explicit_char && pedantic)
9798 pedwarn ("long, short, signed or unsigned used invalidly for `%s'",
9800 if (flag_pedantic_errors)
9805 /* Discard the type modifiers if they are invalid. */
9808 RIDBIT_RESET (RID_UNSIGNED, specbits);
9809 RIDBIT_RESET (RID_SIGNED, specbits);
9810 RIDBIT_RESET (RID_LONG, specbits);
9811 RIDBIT_RESET (RID_SHORT, specbits);
9816 if (RIDBIT_SETP (RID_COMPLEX, specbits)
9817 && TREE_CODE (type) != INTEGER_TYPE && TREE_CODE (type) != REAL_TYPE)
9819 error ("complex invalid for `%s'", name);
9820 RIDBIT_RESET (RID_COMPLEX, specbits);
9823 /* Decide whether an integer type is signed or not.
9824 Optionally treat bitfields as signed by default. */
9825 if (RIDBIT_SETP (RID_UNSIGNED, specbits)
9828 It is implementation-defined whether a plain (neither
9829 explicitly signed or unsigned) char, short, int, or long
9830 bit-field is signed or unsigned.
9832 Naturally, we extend this to long long as well. Note that
9833 this does not include wchar_t. */
9834 || (bitfield && !flag_signed_bitfields
9835 && RIDBIT_NOTSETP (RID_SIGNED, specbits)
9836 /* A typedef for plain `int' without `signed' can be
9837 controlled just like plain `int', but a typedef for
9838 `signed int' cannot be so controlled. */
9840 && C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl))
9841 && (TREE_CODE (type) == INTEGER_TYPE
9842 || TREE_CODE (type) == CHAR_TYPE)
9843 && !same_type_p (TYPE_MAIN_VARIANT (type), wchar_type_node)))
9846 type = long_long_unsigned_type_node;
9847 else if (RIDBIT_SETP (RID_LONG, specbits))
9848 type = long_unsigned_type_node;
9849 else if (RIDBIT_SETP (RID_SHORT, specbits))
9850 type = short_unsigned_type_node;
9851 else if (type == char_type_node)
9852 type = unsigned_char_type_node;
9853 else if (typedef_decl)
9854 type = unsigned_type (type);
9856 type = unsigned_type_node;
9858 else if (RIDBIT_SETP (RID_SIGNED, specbits)
9859 && type == char_type_node)
9860 type = signed_char_type_node;
9862 type = long_long_integer_type_node;
9863 else if (RIDBIT_SETP (RID_LONG, specbits))
9864 type = long_integer_type_node;
9865 else if (RIDBIT_SETP (RID_SHORT, specbits))
9866 type = short_integer_type_node;
9868 if (RIDBIT_SETP (RID_COMPLEX, specbits))
9870 /* If we just have "complex", it is equivalent to
9871 "complex double", but if any modifiers at all are specified it is
9872 the complex form of TYPE. E.g, "complex short" is
9873 "complex short int". */
9875 if (defaulted_int && ! longlong
9876 && ! (RIDBIT_SETP (RID_LONG, specbits)
9877 || RIDBIT_SETP (RID_SHORT, specbits)
9878 || RIDBIT_SETP (RID_SIGNED, specbits)
9879 || RIDBIT_SETP (RID_UNSIGNED, specbits)))
9880 type = complex_double_type_node;
9881 else if (type == integer_type_node)
9882 type = complex_integer_type_node;
9883 else if (type == float_type_node)
9884 type = complex_float_type_node;
9885 else if (type == double_type_node)
9886 type = complex_double_type_node;
9887 else if (type == long_double_type_node)
9888 type = complex_long_double_type_node;
9890 type = build_complex_type (type);
9893 if (return_type == return_conversion
9894 && (RIDBIT_SETP (RID_CONST, specbits)
9895 || RIDBIT_SETP (RID_VOLATILE, specbits)
9896 || RIDBIT_SETP (RID_RESTRICT, specbits)))
9897 cp_error ("qualifiers are not allowed on declaration of `operator %T'",
9900 /* Set CONSTP if this declaration is `const', whether by
9901 explicit specification or via a typedef.
9902 Likewise for VOLATILEP. */
9904 constp = !! RIDBIT_SETP (RID_CONST, specbits) + CP_TYPE_CONST_P (type);
9906 !! RIDBIT_SETP (RID_RESTRICT, specbits) + CP_TYPE_RESTRICT_P (type);
9908 !! RIDBIT_SETP (RID_VOLATILE, specbits) + CP_TYPE_VOLATILE_P (type);
9909 type_quals = ((constp ? TYPE_QUAL_CONST : 0)
9910 | (restrictp ? TYPE_QUAL_RESTRICT : 0)
9911 | (volatilep ? TYPE_QUAL_VOLATILE : 0));
9912 type = cp_build_qualified_type (type, type_quals);
9914 inlinep = !! RIDBIT_SETP (RID_INLINE, specbits);
9915 virtualp = RIDBIT_SETP (RID_VIRTUAL, specbits);
9916 RIDBIT_RESET (RID_VIRTUAL, specbits);
9917 explicitp = RIDBIT_SETP (RID_EXPLICIT, specbits) != 0;
9918 RIDBIT_RESET (RID_EXPLICIT, specbits);
9920 if (RIDBIT_SETP (RID_STATIC, specbits))
9921 staticp = 1 + (decl_context == FIELD);
9923 if (virtualp && staticp == 2)
9925 cp_error ("member `%D' cannot be declared both virtual and static",
9929 friendp = RIDBIT_SETP (RID_FRIEND, specbits);
9930 RIDBIT_RESET (RID_FRIEND, specbits);
9932 /* Warn if two storage classes are given. Default to `auto'. */
9934 if (RIDBIT_ANY_SET (specbits))
9936 if (RIDBIT_SETP (RID_STATIC, specbits)) nclasses++;
9937 if (RIDBIT_SETP (RID_EXTERN, specbits)) nclasses++;
9938 if (decl_context == PARM && nclasses > 0)
9939 error ("storage class specifiers invalid in parameter declarations");
9940 if (RIDBIT_SETP (RID_TYPEDEF, specbits))
9942 if (decl_context == PARM)
9943 error ("typedef declaration invalid in parameter declaration");
9946 if (RIDBIT_SETP (RID_AUTO, specbits)) nclasses++;
9947 if (RIDBIT_SETP (RID_REGISTER, specbits)) nclasses++;
9950 /* Give error if `virtual' is used outside of class declaration. */
9952 && (current_class_name == NULL_TREE || decl_context != FIELD))
9954 error ("virtual outside class declaration");
9958 /* Static anonymous unions are dealt with here. */
9959 if (staticp && decl_context == TYPENAME
9960 && TREE_CODE (declspecs) == TREE_LIST
9961 && ANON_AGGR_TYPE_P (TREE_VALUE (declspecs)))
9962 decl_context = FIELD;
9964 /* Warn about storage classes that are invalid for certain
9965 kinds of declarations (parameters, typenames, etc.). */
9968 error ("multiple storage classes in declaration of `%s'", name);
9969 else if (decl_context != NORMAL && nclasses > 0)
9971 if ((decl_context == PARM || decl_context == CATCHPARM)
9972 && (RIDBIT_SETP (RID_REGISTER, specbits)
9973 || RIDBIT_SETP (RID_AUTO, specbits)))
9975 else if (RIDBIT_SETP (RID_TYPEDEF, specbits))
9977 else if (decl_context == FIELD
9978 /* C++ allows static class elements */
9979 && RIDBIT_SETP (RID_STATIC, specbits))
9980 /* C++ also allows inlines and signed and unsigned elements,
9981 but in those cases we don't come in here. */
9985 if (decl_context == FIELD)
9987 tree tmp = NULL_TREE;
9988 register int op = 0;
9992 /* Avoid trying to get an operand off an identifier node. */
9993 if (TREE_CODE (declarator) == IDENTIFIER_NODE)
9996 tmp = TREE_OPERAND (declarator, 0);
9997 op = IDENTIFIER_OPNAME_P (tmp);
9999 error ("storage class specified for %s `%s'",
10000 op ? "member operator" : "field",
10001 op ? operator_name_string (tmp) : name);
10005 if (decl_context == PARM || decl_context == CATCHPARM)
10006 error ("storage class specified for parameter `%s'", name);
10008 error ("storage class specified for typename");
10010 RIDBIT_RESET (RID_REGISTER, specbits);
10011 RIDBIT_RESET (RID_AUTO, specbits);
10012 RIDBIT_RESET (RID_EXTERN, specbits);
10015 else if (RIDBIT_SETP (RID_EXTERN, specbits) && initialized && !funcdef_flag)
10017 if (toplevel_bindings_p ())
10019 /* It's common practice (and completely valid) to have a const
10020 be initialized and declared extern. */
10021 if (!(type_quals & TYPE_QUAL_CONST))
10022 warning ("`%s' initialized and declared `extern'", name);
10025 error ("`%s' has both `extern' and initializer", name);
10027 else if (RIDBIT_SETP (RID_EXTERN, specbits) && funcdef_flag
10028 && ! toplevel_bindings_p ())
10029 error ("nested function `%s' declared `extern'", name);
10030 else if (toplevel_bindings_p ())
10032 if (RIDBIT_SETP (RID_AUTO, specbits))
10033 error ("top-level declaration of `%s' specifies `auto'", name);
10036 if (nclasses > 0 && friendp)
10037 error ("storage class specifiers invalid in friend function declarations");
10039 /* Now figure out the structure of the declarator proper.
10040 Descend through it, creating more complex types, until we reach
10041 the declared identifier (or NULL_TREE, in an absolute declarator). */
10043 inner_attrs = NULL_TREE;
10046 while (declarator && TREE_CODE (declarator) != IDENTIFIER_NODE
10047 && TREE_CODE (declarator) != TEMPLATE_ID_EXPR)
10049 /* Each level of DECLARATOR is either an ARRAY_REF (for ...[..]),
10050 an INDIRECT_REF (for *...),
10051 a CALL_EXPR (for ...(...)),
10052 an identifier (for the name being declared)
10053 or a null pointer (for the place in an absolute declarator
10054 where the name was omitted).
10055 For the last two cases, we have just exited the loop.
10057 For C++ it could also be
10058 a SCOPE_REF (for class :: ...). In this case, we have converted
10059 sensible names to types, and those are the values we use to
10060 qualify the member name.
10061 an ADDR_EXPR (for &...),
10062 a BIT_NOT_EXPR (for destructors)
10064 At this point, TYPE is the type of elements of an array,
10065 or for a function to return, or for a pointer to point to.
10066 After this sequence of ifs, TYPE is the type of the
10067 array or function or pointer, and DECLARATOR has had its
10068 outermost layer removed. */
10070 if (type == error_mark_node)
10072 if (TREE_CODE (declarator) == SCOPE_REF)
10073 declarator = TREE_OPERAND (declarator, 1);
10075 declarator = TREE_OPERAND (declarator, 0);
10078 if (quals != NULL_TREE
10079 && (declarator == NULL_TREE
10080 || TREE_CODE (declarator) != SCOPE_REF))
10082 if (ctype == NULL_TREE && TREE_CODE (type) == METHOD_TYPE)
10083 ctype = TYPE_METHOD_BASETYPE (type);
10084 if (ctype != NULL_TREE)
10086 tree dummy = build_decl (TYPE_DECL, NULL_TREE, type);
10087 grok_method_quals (ctype, dummy, quals);
10088 type = TREE_TYPE (dummy);
10089 ctype = TREE_TYPE (TREE_VALUE (TYPE_ARG_TYPES (type)));
10094 /* See the comment for the TREE_LIST case, below. */
10097 else if (inner_attrs)
10099 decl_attributes (type, inner_attrs, NULL_TREE);
10100 inner_attrs = NULL_TREE;
10103 switch (TREE_CODE (declarator))
10107 /* We encode a declarator with embedded attributes using
10108 a TREE_LIST. The attributes apply to the declarator
10109 directly inside them, so we have to skip an iteration
10110 before applying them to the type. If the declarator just
10111 inside is the declarator-id, we apply the attrs to the
10113 inner_attrs = TREE_PURPOSE (declarator);
10115 declarator = TREE_VALUE (declarator);
10121 register tree size;
10123 size = TREE_OPERAND (declarator, 1);
10125 /* VC++ spells a zero-sized array with []. */
10126 if (size == NULL_TREE && decl_context == FIELD && ! staticp
10127 && ! RIDBIT_SETP (RID_TYPEDEF, specbits))
10128 size = integer_zero_node;
10130 declarator = TREE_OPERAND (declarator, 0);
10132 type = create_array_type_for_decl (dname, type, size);
10141 tree inner_parms = CALL_DECLARATOR_PARMS (declarator);
10142 tree inner_decl = TREE_OPERAND (declarator, 0);
10144 /* Declaring a function type.
10145 Make sure we have a valid type for the function to return. */
10147 /* We now know that the TYPE_QUALS don't apply to the
10148 decl, but to its return type. */
10149 type_quals = TYPE_UNQUALIFIED;
10151 /* Warn about some types functions can't return. */
10153 if (TREE_CODE (type) == FUNCTION_TYPE)
10155 error ("`%s' declared as function returning a function", name);
10156 type = integer_type_node;
10158 if (TREE_CODE (type) == ARRAY_TYPE)
10160 error ("`%s' declared as function returning an array", name);
10161 type = integer_type_node;
10164 if (inner_decl && TREE_CODE (inner_decl) == SCOPE_REF)
10165 inner_decl = TREE_OPERAND (inner_decl, 1);
10167 if (inner_decl && TREE_CODE (inner_decl) == TEMPLATE_ID_EXPR)
10168 inner_decl = dname;
10170 /* Pick up type qualifiers which should be applied to `this'. */
10171 quals = CALL_DECLARATOR_QUALS (declarator);
10173 /* Pick up the exception specifications. */
10174 raises = CALL_DECLARATOR_EXCEPTION_SPEC (declarator);
10176 /* Say it's a definition only for the CALL_EXPR
10177 closest to the identifier. */
10180 && (TREE_CODE (inner_decl) == IDENTIFIER_NODE
10181 || TREE_CODE (inner_decl) == TEMPLATE_ID_EXPR
10182 || TREE_CODE (inner_decl) == BIT_NOT_EXPR);
10184 if (ctype == NULL_TREE
10185 && decl_context == FIELD
10187 && (friendp == 0 || dname == current_class_name))
10188 ctype = current_class_type;
10190 if (ctype && return_type == return_conversion)
10191 TYPE_HAS_CONVERSION (ctype) = 1;
10192 if (ctype && constructor_name (ctype) == dname)
10194 /* We are within a class's scope. If our declarator name
10195 is the same as the class name, and we are defining
10196 a function, then it is a constructor/destructor, and
10197 therefore returns a void type. */
10199 if (flags == DTOR_FLAG)
10201 /* ISO C++ 12.4/2. A destructor may not be
10202 declared const or volatile. A destructor may
10205 error ("destructor cannot be static member function");
10208 cp_error ("destructors may not be `%s'",
10209 IDENTIFIER_POINTER (TREE_VALUE (quals)));
10212 if (decl_context == FIELD)
10214 if (! member_function_or_else (ctype,
10215 current_class_type,
10217 return void_type_node;
10220 else /* It's a constructor. */
10222 if (explicitp == 1)
10224 /* ISO C++ 12.1. A constructor may not be
10225 declared const or volatile. A constructor may
10226 not be virtual. A constructor may not be
10229 error ("constructor cannot be static member function");
10232 pedwarn ("constructors cannot be declared virtual");
10237 cp_error ("constructors may not be `%s'",
10238 IDENTIFIER_POINTER (TREE_VALUE (quals)));
10242 RID_BIT_TYPE tmp_bits;
10243 bcopy ((void*)&specbits, (void*)&tmp_bits, sizeof (RID_BIT_TYPE));
10244 RIDBIT_RESET (RID_INLINE, tmp_bits);
10245 RIDBIT_RESET (RID_STATIC, tmp_bits);
10246 if (RIDBIT_ANY_SET (tmp_bits))
10247 error ("return value type specifier for constructor ignored");
10249 type = build_pointer_type (ctype);
10250 if (decl_context == FIELD)
10252 if (! member_function_or_else (ctype,
10253 current_class_type,
10255 return void_type_node;
10256 TYPE_HAS_CONSTRUCTOR (ctype) = 1;
10257 if (return_type != return_ctor)
10261 if (decl_context == FIELD)
10267 error ("can't initialize friend function `%s'", name);
10270 /* Cannot be both friend and virtual. */
10271 error ("virtual functions cannot be friends");
10272 RIDBIT_RESET (RID_FRIEND, specbits);
10275 if (decl_context == NORMAL)
10276 error ("friend declaration not in class definition");
10277 if (current_function_decl && funcdef_flag)
10278 cp_error ("can't define friend function `%s' in a local class definition",
10282 /* Construct the function type and go to the next
10283 inner layer of declarator. */
10285 declarator = TREE_OPERAND (declarator, 0);
10287 /* FIXME: This is where default args should be fully
10290 arg_types = grokparms (inner_parms, funcdecl_p ? funcdef_flag : 0);
10292 if (declarator && flags == DTOR_FLAG)
10294 /* A destructor declared in the body of a class will
10295 be represented as a BIT_NOT_EXPR. But, we just
10296 want the underlying IDENTIFIER. */
10297 if (TREE_CODE (declarator) == BIT_NOT_EXPR)
10298 declarator = TREE_OPERAND (declarator, 0);
10300 if (strict_prototype == 0 && arg_types == NULL_TREE)
10301 arg_types = void_list_node;
10302 else if (arg_types == NULL_TREE
10303 || arg_types != void_list_node)
10305 cp_error ("destructors may not have parameters");
10306 arg_types = void_list_node;
10307 last_function_parms = NULL_TREE;
10311 /* ANSI says that `const int foo ();'
10312 does not make the function foo const. */
10313 type = build_function_type (type, arg_types);
10317 for (t = arg_types; t; t = TREE_CHAIN (t))
10318 if (TREE_PURPOSE (t)
10319 && TREE_CODE (TREE_PURPOSE (t)) == DEFAULT_ARG)
10321 add_defarg_fn (type);
10330 /* Filter out pointers-to-references and references-to-references.
10331 We can get these if a TYPE_DECL is used. */
10333 if (TREE_CODE (type) == REFERENCE_TYPE)
10335 error ("cannot declare %s to references",
10336 TREE_CODE (declarator) == ADDR_EXPR
10337 ? "references" : "pointers");
10338 declarator = TREE_OPERAND (declarator, 0);
10342 if (TREE_CODE (type) == OFFSET_TYPE
10343 && (TREE_CODE (TREE_TYPE (type)) == VOID_TYPE
10344 || TREE_CODE (TREE_TYPE (type)) == REFERENCE_TYPE))
10346 cp_error ("cannot declare pointer to `%#T' member",
10348 type = TREE_TYPE (type);
10351 /* Merge any constancy or volatility into the target type
10352 for the pointer. */
10354 /* We now know that the TYPE_QUALS don't apply to the decl,
10355 but to the target of the pointer. */
10356 type_quals = TYPE_UNQUALIFIED;
10358 if (TREE_CODE (declarator) == ADDR_EXPR)
10360 if (TREE_CODE (type) == VOID_TYPE)
10361 error ("invalid type: `void &'");
10363 type = build_reference_type (type);
10365 else if (TREE_CODE (type) == METHOD_TYPE)
10366 type = build_ptrmemfunc_type (build_pointer_type (type));
10368 type = build_pointer_type (type);
10370 /* Process a list of type modifier keywords (such as
10371 const or volatile) that were given inside the `*' or `&'. */
10373 if (TREE_TYPE (declarator))
10375 register tree typemodlist;
10381 for (typemodlist = TREE_TYPE (declarator); typemodlist;
10382 typemodlist = TREE_CHAIN (typemodlist))
10384 tree qualifier = TREE_VALUE (typemodlist);
10386 if (qualifier == ridpointers[(int) RID_CONST])
10388 else if (qualifier == ridpointers[(int) RID_VOLATILE])
10390 else if (qualifier == ridpointers[(int) RID_RESTRICT])
10395 error ("invalid type modifier within pointer declarator");
10399 pedwarn ("duplicate `const'");
10401 pedwarn ("duplicate `volatile'");
10403 pedwarn ("duplicate `restrict'");
10405 type_quals = ((constp ? TYPE_QUAL_CONST : 0)
10406 | (restrictp ? TYPE_QUAL_RESTRICT : 0)
10407 | (volatilep ? TYPE_QUAL_VOLATILE : 0));
10408 if (TREE_CODE (declarator) == ADDR_EXPR
10409 && (constp || volatilep))
10412 pedwarn ("discarding `const' applied to a reference");
10414 pedwarn ("discarding `volatile' applied to a reference");
10415 type_quals &= ~(TYPE_QUAL_CONST | TYPE_QUAL_VOLATILE);
10417 type = cp_build_qualified_type (type, type_quals);
10419 declarator = TREE_OPERAND (declarator, 0);
10425 /* We have converted type names to NULL_TREE if the
10426 name was bogus, or to a _TYPE node, if not.
10428 The variable CTYPE holds the type we will ultimately
10429 resolve to. The code here just needs to build
10430 up appropriate member types. */
10431 tree sname = TREE_OPERAND (declarator, 1);
10434 /* Destructors can have their visibilities changed as well. */
10435 if (TREE_CODE (sname) == BIT_NOT_EXPR)
10436 sname = TREE_OPERAND (sname, 0);
10438 if (TREE_COMPLEXITY (declarator) == 0)
10439 /* This needs to be here, in case we are called
10440 multiple times. */ ;
10441 else if (TREE_COMPLEXITY (declarator) == -1)
10442 /* Namespace member. */
10443 pop_decl_namespace ();
10444 else if (friendp && (TREE_COMPLEXITY (declarator) < 2))
10445 /* Don't fall out into global scope. Hides real bug? --eichin */ ;
10446 else if (! IS_AGGR_TYPE_CODE
10447 (TREE_CODE (TREE_OPERAND (declarator, 0))))
10449 else if (TREE_COMPLEXITY (declarator) == current_class_depth)
10451 /* Resolve any TYPENAME_TYPEs from the decl-specifier-seq
10452 that refer to ctype. They couldn't be resolved earlier
10453 because we hadn't pushed into the class yet.
10454 Example: resolve 'B<T>::type' in
10455 'B<typename B<T>::type> B<T>::f () { }'. */
10456 if (current_template_parms
10457 && uses_template_parms (type)
10458 && uses_template_parms (current_class_type))
10460 tree args = current_template_args ();
10461 type = tsubst (type, args, /*complain=*/1, NULL_TREE);
10464 /* This pop_nested_class corresponds to the
10465 push_nested_class used to push into class scope for
10466 parsing the argument list of a function decl, in
10468 pop_nested_class ();
10469 TREE_COMPLEXITY (declarator) = current_class_depth;
10472 my_friendly_abort (16);
10474 if (TREE_OPERAND (declarator, 0) == NULL_TREE)
10476 /* We had a reference to a global decl, or
10477 perhaps we were given a non-aggregate typedef,
10478 in which case we cleared this out, and should just
10479 keep going as though it wasn't there. */
10480 declarator = sname;
10483 ctype = TREE_OPERAND (declarator, 0);
10486 while (t != NULL_TREE && CLASS_TYPE_P (t))
10488 if (CLASSTYPE_TEMPLATE_INFO (t) &&
10489 !CLASSTYPE_TEMPLATE_SPECIALIZATION (t))
10490 template_count += 1;
10491 t = TYPE_MAIN_DECL (t);
10492 if (DECL_LANG_SPECIFIC (t))
10493 t = DECL_CONTEXT (t);
10498 if (sname == NULL_TREE)
10501 if (TREE_CODE (sname) == IDENTIFIER_NODE)
10503 /* This is the `standard' use of the scoping operator:
10504 basetype :: member . */
10506 if (ctype == current_class_type)
10512 Is this ill-formed? */
10515 cp_pedwarn ("extra qualification `%T::' on member `%s' ignored",
10518 else if (TREE_CODE (type) == FUNCTION_TYPE)
10520 if (current_class_type == NULL_TREE
10522 type = build_cplus_method_type (ctype, TREE_TYPE (type),
10523 TYPE_ARG_TYPES (type));
10526 cp_error ("cannot declare member function `%T::%s' within `%T'",
10527 ctype, name, current_class_type);
10528 return void_type_node;
10531 else if (RIDBIT_SETP (RID_TYPEDEF, specbits)
10532 || TYPE_SIZE (complete_type (ctype)) != NULL_TREE)
10534 /* Have to move this code elsewhere in this function.
10535 this code is used for i.e., typedef int A::M; M *pm;
10537 It is? How? jason 10/2/94 */
10539 if (current_class_type)
10541 cp_error ("cannot declare member `%T::%s' within `%T'",
10542 ctype, name, current_class_type);
10543 return void_type_node;
10545 type = build_offset_type (ctype, type);
10547 else if (uses_template_parms (ctype))
10549 if (TREE_CODE (type) == FUNCTION_TYPE)
10551 = build_cplus_method_type (ctype, TREE_TYPE (type),
10552 TYPE_ARG_TYPES (type));
10556 cp_error ("structure `%T' not yet defined", ctype);
10557 return error_mark_node;
10560 declarator = sname;
10562 else if (TREE_CODE (sname) == SCOPE_REF)
10563 my_friendly_abort (17);
10567 declarator = TREE_OPERAND (declarator, 1);
10568 if (declarator && TREE_CODE (declarator) == CALL_EXPR)
10569 /* In this case, we will deal with it later. */
10573 if (TREE_CODE (type) == FUNCTION_TYPE)
10574 type = build_cplus_method_type (ctype, TREE_TYPE (type),
10575 TYPE_ARG_TYPES (type));
10577 type = build_offset_type (ctype, type);
10584 declarator = TREE_OPERAND (declarator, 0);
10589 case ENUMERAL_TYPE:
10590 declarator = NULL_TREE;
10594 declarator = NULL_TREE;
10598 my_friendly_abort (158);
10602 /* See the comment for the TREE_LIST case, above. */
10605 if (! ignore_attrs)
10606 decl_attributes (type, inner_attrs, NULL_TREE);
10608 TREE_VALUE (attrlist) = chainon (inner_attrs, TREE_VALUE (attrlist));
10610 attrlist = build_decl_list (NULL_TREE, inner_attrs);
10613 /* Now TYPE has the actual type. */
10615 if (explicitp == 1 || (explicitp && friendp))
10617 /* [dcl.fct.spec] The explicit specifier shall only be used in
10618 declarations of constructors within a class definition. */
10619 error ("only declarations of constructors can be `explicit'");
10623 if (RIDBIT_SETP (RID_MUTABLE, specbits))
10625 if (current_class_name == NULL_TREE || decl_context == PARM || friendp)
10627 error ("non-member `%s' cannot be declared `mutable'", name);
10628 RIDBIT_RESET (RID_MUTABLE, specbits);
10630 else if (decl_context == TYPENAME || RIDBIT_SETP (RID_TYPEDEF, specbits))
10632 error ("non-object member `%s' cannot be declared `mutable'", name);
10633 RIDBIT_RESET (RID_MUTABLE, specbits);
10635 else if (TREE_CODE (type) == FUNCTION_TYPE
10636 || TREE_CODE (type) == METHOD_TYPE)
10638 error ("function `%s' cannot be declared `mutable'", name);
10639 RIDBIT_RESET (RID_MUTABLE, specbits);
10643 error ("static `%s' cannot be declared `mutable'", name);
10644 RIDBIT_RESET (RID_MUTABLE, specbits);
10646 else if (type_quals & TYPE_QUAL_CONST)
10648 error ("const `%s' cannot be declared `mutable'", name);
10649 RIDBIT_RESET (RID_MUTABLE, specbits);
10653 if (declarator == NULL_TREE
10654 || TREE_CODE (declarator) == IDENTIFIER_NODE
10655 || (TREE_CODE (declarator) == TEMPLATE_ID_EXPR
10656 && (TREE_CODE (type) == FUNCTION_TYPE
10657 || TREE_CODE (type) == METHOD_TYPE)))
10659 else if (TREE_CODE (declarator) == TEMPLATE_ID_EXPR)
10661 cp_error ("template-id `%D' used as a declarator", declarator);
10662 declarator = dname;
10665 /* Unexpected declarator format. */
10666 my_friendly_abort (990210);
10668 /* If this is declaring a typedef name, return a TYPE_DECL. */
10670 if (RIDBIT_SETP (RID_TYPEDEF, specbits) && decl_context != TYPENAME)
10674 /* Note that the grammar rejects storage classes
10675 in typenames, fields or parameters. */
10676 if (current_lang_name == lang_name_java)
10677 TYPE_FOR_JAVA (type) = 1;
10679 if (decl_context == FIELD)
10681 if (declarator == constructor_name (current_class_type))
10682 cp_pedwarn ("ISO C++ forbids nested type `%D' with same name as enclosing class",
10684 decl = build_lang_decl (TYPE_DECL, declarator, type);
10688 /* Make sure this typedef lives as long as its type,
10689 since it might be used as a template parameter. */
10690 if (processing_template_decl)
10691 decl = build_lang_decl (TYPE_DECL, declarator, type);
10693 decl = build_decl (TYPE_DECL, declarator, type);
10696 /* If the user declares "typedef struct {...} foo" then the
10697 struct will have an anonymous name. Fill that name in now.
10698 Nothing can refer to it, so nothing needs know about the name
10700 if (type != error_mark_node
10701 && TYPE_NAME (type)
10702 && TREE_CODE (TYPE_NAME (type)) == TYPE_DECL
10703 && ANON_AGGRNAME_P (TYPE_IDENTIFIER (type))
10704 && CP_TYPE_QUALS (type) == TYPE_UNQUALIFIED)
10706 tree oldname = TYPE_NAME (type);
10709 /* Replace the anonymous name with the real name everywhere. */
10710 lookup_tag_reverse (type, declarator);
10711 for (t = TYPE_MAIN_VARIANT (type); t; t = TYPE_NEXT_VARIANT (t))
10712 if (TYPE_NAME (t) == oldname)
10713 TYPE_NAME (t) = decl;
10715 if (TYPE_LANG_SPECIFIC (type))
10716 TYPE_WAS_ANONYMOUS (type) = 1;
10718 /* If this is a typedef within a template class, the nested
10719 type is a (non-primary) template. The name for the
10720 template needs updating as well. */
10721 if (TYPE_LANG_SPECIFIC (type) && CLASSTYPE_TEMPLATE_INFO (type))
10722 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type))
10723 = TYPE_IDENTIFIER (type);
10725 /* XXX Temporarily set the scope.
10726 When returning, start_decl expects it as NULL_TREE,
10727 and will then then set it using pushdecl. */
10728 my_friendly_assert (DECL_CONTEXT (decl) == NULL_TREE, 980404);
10729 if (current_class_type)
10730 DECL_CONTEXT (decl) = current_class_type;
10732 DECL_CONTEXT (decl) = FROB_CONTEXT (current_namespace);
10734 DECL_ASSEMBLER_NAME (decl) = DECL_NAME (decl);
10735 DECL_ASSEMBLER_NAME (decl)
10736 = get_identifier (build_overload_name (type, 1, 1));
10737 DECL_CONTEXT (decl) = NULL_TREE;
10739 /* FIXME remangle member functions; member functions of a
10740 type with external linkage have external linkage. */
10743 if (TREE_CODE (type) == OFFSET_TYPE || TREE_CODE (type) == METHOD_TYPE)
10745 cp_error_at ("typedef name may not be class-qualified", decl);
10750 if (ctype == NULL_TREE)
10752 if (TREE_CODE (type) != METHOD_TYPE)
10753 cp_error_at ("invalid type qualifier for non-member function type", decl);
10755 ctype = TYPE_METHOD_BASETYPE (type);
10757 if (ctype != NULL_TREE)
10758 grok_method_quals (ctype, decl, quals);
10761 if (RIDBIT_SETP (RID_SIGNED, specbits)
10762 || (typedef_decl && C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl)))
10763 C_TYPEDEF_EXPLICITLY_SIGNED (decl) = 1;
10765 bad_specifiers (decl, "type", virtualp, quals != NULL_TREE,
10766 inlinep, friendp, raises != NULL_TREE);
10769 error ("typedef declaration includes an initializer");
10774 /* Detect the case of an array type of unspecified size
10775 which came, as such, direct from a typedef name.
10776 We must copy the type, so that each identifier gets
10777 a distinct type, so that each identifier's size can be
10778 controlled separately by its own initializer. */
10780 if (type == typedef_type && TREE_CODE (type) == ARRAY_TYPE
10781 && TYPE_DOMAIN (type) == NULL_TREE)
10783 type = build_cplus_array_type (TREE_TYPE (type), TYPE_DOMAIN (type));
10786 /* If this is a type name (such as, in a cast or sizeof),
10787 compute the type and return it now. */
10789 if (decl_context == TYPENAME)
10791 /* Note that the grammar rejects storage classes
10792 in typenames, fields or parameters. */
10793 if (type_quals != TYPE_UNQUALIFIED)
10794 type_quals = TYPE_UNQUALIFIED;
10796 /* Special case: "friend class foo" looks like a TYPENAME context. */
10799 if (type_quals != TYPE_UNQUALIFIED)
10801 cp_error ("type qualifiers specified for friend class declaration");
10802 type_quals = TYPE_UNQUALIFIED;
10806 cp_error ("`inline' specified for friend class declaration");
10810 /* Only try to do this stuff if we didn't already give up. */
10811 if (type != integer_type_node)
10813 /* A friendly class? */
10814 if (current_class_type)
10815 make_friend_class (current_class_type, TYPE_MAIN_VARIANT (type));
10817 error ("trying to make class `%s' a friend of global scope",
10818 TYPE_NAME_STRING (type));
10819 type = void_type_node;
10824 if (ctype == NULL_TREE)
10826 if (TREE_CODE (type) != METHOD_TYPE)
10827 cp_error ("invalid qualifiers on non-member function type");
10829 ctype = TYPE_METHOD_BASETYPE (type);
10833 tree dummy = build_decl (TYPE_DECL, declarator, type);
10834 grok_method_quals (ctype, dummy, quals);
10835 type = TREE_TYPE (dummy);
10841 else if (declarator == NULL_TREE && decl_context != PARM
10842 && decl_context != CATCHPARM
10843 && TREE_CODE (type) != UNION_TYPE
10846 cp_error ("abstract declarator `%T' used as declaration", type);
10847 declarator = make_anon_name ();
10850 /* `void' at top level (not within pointer)
10851 is allowed only in typedefs or type names.
10852 We don't complain about parms either, but that is because
10853 a better error message can be made later. */
10855 if (TREE_CODE (type) == VOID_TYPE && decl_context != PARM)
10858 error ("unnamed variable or field declared void");
10859 else if (TREE_CODE (declarator) == IDENTIFIER_NODE)
10861 if (IDENTIFIER_OPNAME_P (declarator))
10862 my_friendly_abort (356);
10864 error ("variable or field `%s' declared void", name);
10867 error ("variable or field declared void");
10868 type = integer_type_node;
10871 /* Now create the decl, which may be a VAR_DECL, a PARM_DECL
10872 or a FUNCTION_DECL, depending on DECL_CONTEXT and TYPE. */
10874 if (decl_context == PARM || decl_context == CATCHPARM)
10876 if (ctype || in_namespace)
10877 error ("cannot use `::' in parameter declaration");
10879 /* A parameter declared as an array of T is really a pointer to T.
10880 One declared as a function is really a pointer to a function.
10881 One declared as a member is really a pointer to member. */
10883 if (TREE_CODE (type) == ARRAY_TYPE)
10885 /* Transfer const-ness of array into that of type pointed to. */
10886 type = build_pointer_type (TREE_TYPE (type));
10887 type_quals = TYPE_UNQUALIFIED;
10889 else if (TREE_CODE (type) == FUNCTION_TYPE)
10890 type = build_pointer_type (type);
10891 else if (TREE_CODE (type) == OFFSET_TYPE)
10892 type = build_pointer_type (type);
10893 else if (TREE_CODE (type) == VOID_TYPE && declarator)
10895 error ("declaration of `%s' as void", name);
10901 register tree decl;
10903 if (decl_context == PARM)
10905 decl = build_decl (PARM_DECL, declarator, type);
10907 bad_specifiers (decl, "parameter", virtualp, quals != NULL_TREE,
10908 inlinep, friendp, raises != NULL_TREE);
10910 /* Compute the type actually passed in the parmlist,
10911 for the case where there is no prototype.
10912 (For example, shorts and chars are passed as ints.)
10913 When there is a prototype, this is overridden later. */
10915 DECL_ARG_TYPE (decl) = type_promotes_to (type);
10917 else if (decl_context == FIELD)
10919 if (type == error_mark_node)
10921 /* Happens when declaring arrays of sizes which
10922 are error_mark_node, for example. */
10925 else if (in_namespace && !friendp)
10927 /* Something like struct S { int N::j; }; */
10928 cp_error ("invalid use of `::'");
10931 else if (TREE_CODE (type) == FUNCTION_TYPE)
10934 tree function_context;
10936 /* We catch the others as conflicts with the builtin
10938 if (friendp && declarator == ridpointers[(int) RID_SIGNED])
10940 cp_error ("function `%D' cannot be declared friend",
10947 if (ctype == NULL_TREE)
10948 ctype = current_class_type;
10950 if (ctype == NULL_TREE)
10952 cp_error ("can't make `%D' into a method -- not in a class",
10954 return void_type_node;
10957 /* ``A union may [ ... ] not [ have ] virtual functions.''
10959 if (virtualp && TREE_CODE (ctype) == UNION_TYPE)
10961 cp_error ("function `%D' declared virtual inside a union",
10963 return void_type_node;
10966 if (declarator == ansi_opname[(int) NEW_EXPR]
10967 || declarator == ansi_opname[(int) VEC_NEW_EXPR]
10968 || declarator == ansi_opname[(int) DELETE_EXPR]
10969 || declarator == ansi_opname[(int) VEC_DELETE_EXPR])
10973 cp_error ("`%D' cannot be declared virtual, since it is always static",
10978 else if (staticp < 2)
10979 type = build_cplus_method_type (ctype, TREE_TYPE (type),
10980 TYPE_ARG_TYPES (type));
10983 /* Tell grokfndecl if it needs to set TREE_PUBLIC on the node. */
10984 function_context = (ctype != NULL_TREE) ?
10985 decl_function_context (TYPE_MAIN_DECL (ctype)) : NULL_TREE;
10986 publicp = (! friendp || ! staticp)
10987 && function_context == NULL_TREE;
10988 decl = grokfndecl (ctype, type,
10989 TREE_CODE (declarator) != TEMPLATE_ID_EXPR
10990 ? declarator : dname,
10992 virtualp, flags, quals, raises,
10993 friendp ? -1 : 0, friendp, publicp, inlinep,
10994 funcdef_flag, template_count, in_namespace);
10995 if (decl == NULL_TREE)
10998 /* This clobbers the attrs stored in `decl' from `attrlist'. */
10999 /* The decl and setting of decl_machine_attr is also turned off. */
11000 decl = build_decl_attribute_variant (decl, decl_machine_attr);
11003 /* [class.conv.ctor]
11005 A constructor declared without the function-specifier
11006 explicit that can be called with a single parameter
11007 specifies a conversion from the type of its first
11008 parameter to the type of its class. Such a constructor
11009 is called a converting constructor. */
11010 if (explicitp == 2)
11011 DECL_NONCONVERTING_P (decl) = 1;
11012 else if (DECL_CONSTRUCTOR_P (decl))
11014 /* The constructor can be called with exactly one
11015 parameter if there is at least one parameter, and
11016 any subsequent parameters have default arguments.
11017 We don't look at the first parameter, which is
11018 really just the `this' parameter for the new
11021 TREE_CHAIN (TYPE_ARG_TYPES (TREE_TYPE (decl)));
11023 /* Skip the `in_chrg' argument too, if present. */
11024 if (TYPE_USES_VIRTUAL_BASECLASSES (DECL_CONTEXT (decl)))
11025 arg_types = TREE_CHAIN (arg_types);
11027 if (arg_types == void_list_node
11029 && TREE_CHAIN (arg_types)
11030 && TREE_CHAIN (arg_types) != void_list_node
11031 && !TREE_PURPOSE (TREE_CHAIN (arg_types))))
11032 DECL_NONCONVERTING_P (decl) = 1;
11035 else if (TREE_CODE (type) == METHOD_TYPE)
11037 /* We only get here for friend declarations of
11038 members of other classes. */
11039 /* All method decls are public, so tell grokfndecl to set
11040 TREE_PUBLIC, also. */
11041 decl = grokfndecl (ctype, type, declarator, declarator,
11042 virtualp, flags, quals, raises,
11043 friendp ? -1 : 0, friendp, 1, 0, funcdef_flag,
11044 template_count, in_namespace);
11045 if (decl == NULL_TREE)
11048 else if (!staticp && ! processing_template_decl
11049 && TYPE_SIZE (complete_type (type)) == NULL_TREE
11050 && (TREE_CODE (type) != ARRAY_TYPE || initialized == 0))
11053 cp_error ("field `%D' has incomplete type", declarator);
11055 cp_error ("name `%T' has incomplete type", type);
11057 /* If we're instantiating a template, tell them which
11058 instantiation made the field's type be incomplete. */
11059 if (current_class_type
11060 && TYPE_NAME (current_class_type)
11061 && IDENTIFIER_TEMPLATE (TYPE_IDENTIFIER (current_class_type))
11062 && declspecs && TREE_VALUE (declspecs)
11063 && TREE_TYPE (TREE_VALUE (declspecs)) == type)
11064 cp_error (" in instantiation of template `%T'",
11065 current_class_type);
11067 type = error_mark_node;
11074 error ("`%s' is neither function nor member function; cannot be declared friend",
11075 IDENTIFIER_POINTER (declarator));
11083 /* Friends are treated specially. */
11084 if (ctype == current_class_type)
11085 warning ("member functions are implicitly friends of their class");
11088 tree t = NULL_TREE;
11089 if (decl && DECL_NAME (decl))
11091 if (template_class_depth (current_class_type) == 0)
11094 = check_explicit_specialization
11096 template_count, 2 * (funcdef_flag != 0) + 4);
11097 if (decl == error_mark_node)
11098 return error_mark_node;
11101 t = do_friend (ctype, declarator, decl,
11102 last_function_parms, attrlist, flags, quals,
11105 if (t && funcdef_flag)
11108 return void_type_node;
11112 /* Structure field. It may not be a function, except for C++ */
11114 if (decl == NULL_TREE)
11120 /* An attempt is being made to initialize a non-static
11121 member. But, from [class.mem]:
11123 4 A member-declarator can contain a
11124 constant-initializer only if it declares a static
11125 member (_class.static_) of integral or enumeration
11126 type, see _class.static.data_.
11128 This used to be relatively common practice, but
11129 the rest of the compiler does not correctly
11130 handle the initialization unless the member is
11131 static so we make it static below. */
11132 cp_pedwarn ("ISO C++ forbids initialization of member `%D'",
11134 cp_pedwarn ("making `%D' static", declarator);
11138 if (uses_template_parms (type))
11139 /* We'll check at instantiation time. */
11141 else if (check_static_variable_definition (declarator,
11143 /* If we just return the declaration, crashes
11144 will sometimes occur. We therefore return
11145 void_type_node, as if this was a friend
11146 declaration, to cause callers to completely
11147 ignore this declaration. */
11148 return void_type_node;
11151 /* 9.2p13 [class.mem] */
11152 if (declarator == constructor_name (current_class_type)
11153 /* Divergence from the standard: In extern "C", we
11154 allow non-static data members here, because C does
11155 and /usr/include/netinet/in.h uses that. */
11156 && (staticp || ! in_system_header))
11157 cp_pedwarn ("ISO C++ forbids data member `%D' with same name as enclosing class",
11162 /* C++ allows static class members. All other work
11163 for this is done by grokfield. */
11164 decl = build_lang_decl (VAR_DECL, declarator, type);
11165 TREE_STATIC (decl) = 1;
11166 /* In class context, 'static' means public access. */
11167 TREE_PUBLIC (decl) = DECL_EXTERNAL (decl) = 1;
11171 decl = build_lang_decl (FIELD_DECL, declarator, type);
11172 if (RIDBIT_SETP (RID_MUTABLE, specbits))
11174 DECL_MUTABLE_P (decl) = 1;
11175 RIDBIT_RESET (RID_MUTABLE, specbits);
11179 bad_specifiers (decl, "field", virtualp, quals != NULL_TREE,
11180 inlinep, friendp, raises != NULL_TREE);
11183 else if (TREE_CODE (type) == FUNCTION_TYPE || TREE_CODE (type) == METHOD_TYPE)
11185 tree original_name;
11191 if (TREE_CODE (declarator) == TEMPLATE_ID_EXPR)
11192 original_name = dname;
11194 original_name = declarator;
11196 if (RIDBIT_SETP (RID_AUTO, specbits))
11197 error ("storage class `auto' invalid for function `%s'", name);
11198 else if (RIDBIT_SETP (RID_REGISTER, specbits))
11199 error ("storage class `register' invalid for function `%s'", name);
11201 /* Function declaration not at top level.
11202 Storage classes other than `extern' are not allowed
11203 and `extern' makes no difference. */
11204 if (! toplevel_bindings_p ()
11205 && (RIDBIT_SETP (RID_STATIC, specbits)
11206 || RIDBIT_SETP (RID_INLINE, specbits))
11209 if (RIDBIT_SETP (RID_STATIC, specbits))
11210 pedwarn ("storage class `static' invalid for function `%s' declared out of global scope", name);
11212 pedwarn ("storage class `inline' invalid for function `%s' declared out of global scope", name);
11215 if (ctype == NULL_TREE)
11219 error ("virtual non-class function `%s'", name);
11223 else if (TREE_CODE (type) == FUNCTION_TYPE && staticp < 2)
11224 type = build_cplus_method_type (ctype, TREE_TYPE (type),
11225 TYPE_ARG_TYPES (type));
11227 /* Record presence of `static'. */
11228 publicp = (ctype != NULL_TREE
11229 || RIDBIT_SETP (RID_EXTERN, specbits)
11230 || !RIDBIT_SETP (RID_STATIC, specbits));
11232 decl = grokfndecl (ctype, type, original_name, declarator,
11233 virtualp, flags, quals, raises,
11235 publicp, inlinep, funcdef_flag,
11236 template_count, in_namespace);
11237 if (decl == NULL_TREE)
11242 int illegal_static = 0;
11244 /* Don't allow a static member function in a class, and forbid
11245 declaring main to be static. */
11246 if (TREE_CODE (type) == METHOD_TYPE)
11248 cp_pedwarn ("cannot declare member function `%D' to have static linkage", decl);
11249 illegal_static = 1;
11251 else if (current_function_decl)
11253 /* FIXME need arm citation */
11254 error ("cannot declare static function inside another function");
11255 illegal_static = 1;
11258 if (illegal_static)
11261 RIDBIT_RESET (RID_STATIC, specbits);
11267 /* It's a variable. */
11269 /* An uninitialized decl with `extern' is a reference. */
11270 decl = grokvardecl (type, declarator, &specbits,
11272 (type_quals & TYPE_QUAL_CONST) != 0,
11274 bad_specifiers (decl, "variable", virtualp, quals != NULL_TREE,
11275 inlinep, friendp, raises != NULL_TREE);
11279 DECL_CONTEXT (decl) = ctype;
11282 cp_pedwarn ("static member `%D' re-declared as static", decl);
11284 RIDBIT_RESET (RID_STATIC, specbits);
11286 if (RIDBIT_SETP (RID_REGISTER, specbits) && TREE_STATIC (decl))
11288 cp_error ("static member `%D' declared `register'", decl);
11289 RIDBIT_RESET (RID_REGISTER, specbits);
11291 if (RIDBIT_SETP (RID_EXTERN, specbits) && pedantic)
11293 cp_pedwarn ("cannot explicitly declare member `%#D' to have extern linkage",
11295 RIDBIT_RESET (RID_EXTERN, specbits);
11300 my_friendly_assert (!RIDBIT_SETP (RID_MUTABLE, specbits), 19990927);
11302 /* Record `register' declaration for warnings on &
11303 and in case doing stupid register allocation. */
11305 if (RIDBIT_SETP (RID_REGISTER, specbits))
11306 DECL_REGISTER (decl) = 1;
11308 if (RIDBIT_SETP (RID_EXTERN, specbits))
11309 DECL_THIS_EXTERN (decl) = 1;
11311 if (RIDBIT_SETP (RID_STATIC, specbits))
11312 DECL_THIS_STATIC (decl) = 1;
11314 /* Record constancy and volatility. There's no need to do this
11315 when processing a template; we'll do this for the instantiated
11316 declaration based on the type of DECL. */
11317 if (!processing_template_decl)
11318 c_apply_type_quals_to_decl (type_quals, decl);
11324 /* Tell if a parmlist/exprlist looks like an exprlist or a parmlist.
11325 An empty exprlist is a parmlist. An exprlist which
11326 contains only identifiers at the global level
11327 is a parmlist. Otherwise, it is an exprlist. */
11330 parmlist_is_exprlist (exprs)
11333 if (exprs == NULL_TREE || TREE_PARMLIST (exprs))
11336 if (toplevel_bindings_p ())
11338 /* At the global level, if these are all identifiers,
11339 then it is a parmlist. */
11342 if (TREE_CODE (TREE_VALUE (exprs)) != IDENTIFIER_NODE)
11344 exprs = TREE_CHAIN (exprs);
11351 /* Subroutine of start_function. Ensure that each of the parameter
11352 types (as listed in PARMS) is complete, as is required for a
11353 function definition. */
11356 require_complete_types_for_parms (parms)
11359 for (; parms; parms = TREE_CHAIN (parms))
11361 tree type = TREE_TYPE (parms);
11363 /* Try to complete the TYPE. */
11364 type = complete_type (type);
11366 if (type == error_mark_node)
11369 if (TYPE_SIZE (type) == NULL_TREE)
11371 if (DECL_NAME (parms))
11372 error ("parameter `%s' has incomplete type",
11373 IDENTIFIER_POINTER (DECL_NAME (parms)));
11375 error ("parameter has incomplete type");
11376 TREE_TYPE (parms) = error_mark_node;
11379 layout_decl (parms, 0);
11383 /* Returns non-zero if T is a local variable. */
11386 local_variable_p (t)
11389 if ((TREE_CODE (t) == VAR_DECL
11390 /* A VAR_DECL with a context that is a _TYPE is a static data
11392 && !TYPE_P (CP_DECL_CONTEXT (t))
11393 /* Any other non-local variable must be at namespace scope. */
11394 && !DECL_NAMESPACE_SCOPE_P (t))
11395 || (TREE_CODE (t) == PARM_DECL))
11401 /* Returns non-zero if T is an automatic local variable or a label.
11402 (These are the declarations that need to be remapped when the code
11403 containing them is duplicated.) */
11406 nonstatic_local_decl_p (t)
11409 return ((local_variable_p (t) && !TREE_STATIC (t))
11410 || TREE_CODE (t) == LABEL_DECL
11411 || TREE_CODE (t) == RESULT_DECL);
11414 /* Like local_variable_p, but suitable for use as a tree-walking
11418 local_variable_p_walkfn (tp, walk_subtrees, data)
11420 int *walk_subtrees ATTRIBUTE_UNUSED;
11421 void *data ATTRIBUTE_UNUSED;
11423 return ((local_variable_p (*tp) && !DECL_ARTIFICIAL (*tp))
11424 ? *tp : NULL_TREE);
11427 /* Check that ARG, which is a default-argument expression for a
11428 parameter DECL, is legal. Returns ARG, or ERROR_MARK_NODE, if
11429 something goes wrong. DECL may also be a _TYPE node, rather than a
11430 DECL, if there is no DECL available. */
11433 check_default_argument (decl, arg)
11440 if (TREE_CODE (arg) == DEFAULT_ARG)
11441 /* We get a DEFAULT_ARG when looking at an in-class declaration
11442 with a default argument. Ignore the argument for now; we'll
11443 deal with it after the class is complete. */
11446 if (processing_template_decl || uses_template_parms (arg))
11447 /* We don't do anything checking until instantiation-time. Note
11448 that there may be uninstantiated arguments even for an
11449 instantiated function, since default arguments are not
11450 instantiated until they are needed. */
11459 decl_type = TREE_TYPE (decl);
11461 if (arg == error_mark_node
11462 || decl == error_mark_node
11463 || TREE_TYPE (arg) == error_mark_node
11464 || decl_type == error_mark_node)
11465 /* Something already went wrong. There's no need to check
11467 return error_mark_node;
11469 /* [dcl.fct.default]
11471 A default argument expression is implicitly converted to the
11473 if (!TREE_TYPE (arg)
11474 || !can_convert_arg (decl_type, TREE_TYPE (arg), arg))
11477 cp_error ("default argument for `%#D' has type `%T'",
11478 decl, TREE_TYPE (arg));
11480 cp_error ("default argument for parameter of type `%T' has type `%T'",
11481 decl_type, TREE_TYPE (arg));
11483 return error_mark_node;
11486 /* [dcl.fct.default]
11488 Local variables shall not be used in default argument
11491 The keyword `this' shall not be used in a default argument of a
11492 member function. */
11493 var = walk_tree (&arg, local_variable_p_walkfn, NULL);
11496 cp_error ("default argument `%E' uses local variable `%D'",
11498 return error_mark_node;
11505 /* Decode the list of parameter types for a function type.
11506 Given the list of things declared inside the parens,
11507 return a list of types.
11509 The list we receive can have three kinds of elements:
11510 an IDENTIFIER_NODE for names given without types,
11511 a TREE_LIST node for arguments given as typespecs or names with typespecs,
11512 or void_type_node, to mark the end of an argument list
11513 when additional arguments are not permitted (... was not used).
11515 FUNCDEF_FLAG is nonzero for a function definition, 0 for
11516 a mere declaration. A nonempty identifier-list gets an error message
11517 when FUNCDEF_FLAG is zero.
11518 If FUNCDEF_FLAG is 1, then parameter types must be complete.
11519 If FUNCDEF_FLAG is -1, then parameter types may be incomplete.
11521 If all elements of the input list contain types,
11522 we return a list of the types.
11523 If all elements contain no type (except perhaps a void_type_node
11524 at the end), we return a null list.
11525 If some have types and some do not, it is an error, and we
11526 return a null list.
11528 Also set last_function_parms to either
11529 a list of names (IDENTIFIER_NODEs) or a chain of PARM_DECLs.
11530 A list of names is converted to a chain of PARM_DECLs
11531 by store_parm_decls so that ultimately it is always a chain of decls.
11533 Note that in C++, parameters can take default values. These default
11534 values are in the TREE_PURPOSE field of the TREE_LIST. It is
11535 an error to specify default values which are followed by parameters
11536 that have no default values, or an ELLIPSES. For simplicities sake,
11537 only parameters which are specified with their types can take on
11541 grokparms (first_parm, funcdef_flag)
11545 tree result = NULL_TREE;
11546 tree decls = NULL_TREE;
11548 if (first_parm != NULL_TREE
11549 && TREE_CODE (TREE_VALUE (first_parm)) == IDENTIFIER_NODE)
11551 if (! funcdef_flag)
11552 pedwarn ("parameter names (without types) in function declaration");
11553 last_function_parms = first_parm;
11556 else if (first_parm != NULL_TREE
11557 && TREE_CODE (TREE_VALUE (first_parm)) != TREE_LIST
11558 && TREE_CODE (TREE_VALUE (first_parm)) != VOID_TYPE)
11559 my_friendly_abort (145);
11562 /* Types were specified. This is a list of declarators
11563 each represented as a TREE_LIST node. */
11564 register tree parm, chain;
11565 int any_init = 0, any_error = 0;
11567 if (first_parm != NULL_TREE)
11569 tree last_result = NULL_TREE;
11570 tree last_decl = NULL_TREE;
11572 for (parm = first_parm; parm != NULL_TREE; parm = chain)
11574 tree type = NULL_TREE, list_node = parm;
11575 register tree decl = TREE_VALUE (parm);
11576 tree init = TREE_PURPOSE (parm);
11578 chain = TREE_CHAIN (parm);
11579 /* @@ weak defense against parse errors. */
11580 if (TREE_CODE (decl) != VOID_TYPE
11581 && TREE_CODE (decl) != TREE_LIST)
11583 /* Give various messages as the need arises. */
11584 if (TREE_CODE (decl) == STRING_CST)
11585 cp_error ("invalid string constant `%E'", decl);
11586 else if (TREE_CODE (decl) == INTEGER_CST)
11587 error ("invalid integer constant in parameter list, did you forget to give parameter name?");
11591 if (TREE_CODE (decl) != VOID_TYPE)
11593 decl = grokdeclarator (TREE_VALUE (decl),
11594 TREE_PURPOSE (decl),
11595 PARM, init != NULL_TREE,
11597 if (! decl || TREE_TYPE (decl) == error_mark_node)
11600 /* Top-level qualifiers on the parameters are
11601 ignored for function types. */
11602 type = TYPE_MAIN_VARIANT (TREE_TYPE (decl));
11604 if (TREE_CODE (type) == VOID_TYPE)
11605 decl = void_type_node;
11606 else if (TREE_CODE (type) == METHOD_TYPE)
11608 if (DECL_NAME (decl))
11609 /* Cannot use the decl here because
11610 we don't have DECL_CONTEXT set up yet. */
11611 cp_error ("parameter `%D' invalidly declared method type",
11614 error ("parameter invalidly declared method type");
11615 type = build_pointer_type (type);
11616 TREE_TYPE (decl) = type;
11618 else if (TREE_CODE (type) == OFFSET_TYPE)
11620 if (DECL_NAME (decl))
11621 cp_error ("parameter `%D' invalidly declared offset type",
11624 error ("parameter invalidly declared offset type");
11625 type = build_pointer_type (type);
11626 TREE_TYPE (decl) = type;
11628 else if (abstract_virtuals_error (decl, type))
11629 any_error = 1; /* Seems like a good idea. */
11630 else if (POINTER_TYPE_P (type))
11633 while (POINTER_TYPE_P (t)
11634 || (TREE_CODE (t) == ARRAY_TYPE
11635 && TYPE_DOMAIN (t) != NULL_TREE))
11637 if (TREE_CODE (t) == ARRAY_TYPE)
11638 cp_error ("parameter type `%T' includes %s to array of unknown bound",
11640 TYPE_PTR_P (type) ? "pointer" : "reference");
11644 if (TREE_CODE (decl) == VOID_TYPE)
11646 if (result == NULL_TREE)
11648 result = void_list_node;
11649 last_result = result;
11653 TREE_CHAIN (last_result) = void_list_node;
11654 last_result = void_list_node;
11657 && (chain != void_list_node || TREE_CHAIN (chain)))
11658 error ("`void' in parameter list must be entire list");
11662 /* Since there is a prototype, args are passed in their own types. */
11663 DECL_ARG_TYPE (decl) = TREE_TYPE (decl);
11664 if (PROMOTE_PROTOTYPES
11665 && (TREE_CODE (type) == INTEGER_TYPE
11666 || TREE_CODE (type) == ENUMERAL_TYPE)
11667 && TYPE_PRECISION (type) < TYPE_PRECISION (integer_type_node))
11668 DECL_ARG_TYPE (decl) = integer_type_node;
11669 if (!any_error && init)
11672 init = check_default_argument (decl, init);
11677 if (decls == NULL_TREE)
11684 TREE_CHAIN (last_decl) = decl;
11687 list_node = tree_cons (init, type, NULL_TREE);
11688 if (result == NULL_TREE)
11690 result = list_node;
11691 last_result = result;
11695 TREE_CHAIN (last_result) = list_node;
11696 last_result = list_node;
11700 TREE_CHAIN (last_result) = NULL_TREE;
11701 /* If there are no parameters, and the function does not end
11702 with `...', then last_decl will be NULL_TREE. */
11703 if (last_decl != NULL_TREE)
11704 TREE_CHAIN (last_decl) = NULL_TREE;
11708 last_function_parms = decls;
11713 /* Called from the parser to update an element of TYPE_ARG_TYPES for some
11714 FUNCTION_TYPE with the newly parsed version of its default argument, which
11715 was previously digested as text. See snarf_defarg et al in lex.c. */
11718 replace_defarg (arg, init)
11721 if (! processing_template_decl
11722 && ! can_convert_arg (TREE_VALUE (arg), TREE_TYPE (init), init))
11723 cp_pedwarn ("invalid type `%T' for default argument to `%T'",
11724 TREE_TYPE (init), TREE_VALUE (arg));
11725 TREE_PURPOSE (arg) = init;
11728 /* D is a constructor or overloaded `operator='. Returns non-zero if
11729 D's arguments allow it to be a copy constructor, or copy assignment
11738 if (!DECL_FUNCTION_MEMBER_P (d))
11741 t = FUNCTION_ARG_CHAIN (d);
11742 if (DECL_CONSTRUCTOR_P (d)
11743 && TYPE_USES_VIRTUAL_BASECLASSES (DECL_CONTEXT (d)))
11744 t = TREE_CHAIN (t);
11745 if (t && TREE_CODE (TREE_VALUE (t)) == REFERENCE_TYPE
11746 && (TYPE_MAIN_VARIANT (TREE_TYPE (TREE_VALUE (t)))
11747 == DECL_CONTEXT (d))
11748 && (TREE_CHAIN (t) == NULL_TREE
11749 || TREE_CHAIN (t) == void_list_node
11750 || TREE_PURPOSE (TREE_CHAIN (t))))
11755 /* These memoizing functions keep track of special properties which
11756 a class may have. `grok_ctor_properties' notices whether a class
11757 has a constructor of the form X(X&), and also complains
11758 if the class has a constructor of the form X(X).
11759 `grok_op_properties' takes notice of the various forms of
11760 operator= which are defined, as well as what sorts of type conversion
11761 may apply. Both functions take a FUNCTION_DECL as an argument. */
11764 grok_ctor_properties (ctype, decl)
11767 tree parmtypes = FUNCTION_ARG_CHAIN (decl);
11768 tree parmtype = parmtypes ? TREE_VALUE (parmtypes) : void_type_node;
11770 /* When a type has virtual baseclasses, a magical first int argument is
11771 added to any ctor so we can tell if the class has been initialized
11772 yet. This could screw things up in this function, so we deliberately
11773 ignore the leading int if we're in that situation. */
11774 if (TYPE_USES_VIRTUAL_BASECLASSES (ctype))
11776 my_friendly_assert (parmtypes
11777 && TREE_VALUE (parmtypes) == integer_type_node,
11779 parmtypes = TREE_CHAIN (parmtypes);
11780 parmtype = TREE_VALUE (parmtypes);
11785 A non-template constructor for class X is a copy constructor if
11786 its first parameter is of type X&, const X&, volatile X& or const
11787 volatile X&, and either there are no other parameters or else all
11788 other parameters have default arguments. */
11789 if (TREE_CODE (parmtype) == REFERENCE_TYPE
11790 && TYPE_MAIN_VARIANT (TREE_TYPE (parmtype)) == ctype
11791 && (TREE_CHAIN (parmtypes) == NULL_TREE
11792 || TREE_CHAIN (parmtypes) == void_list_node
11793 || TREE_PURPOSE (TREE_CHAIN (parmtypes)))
11794 && !(DECL_TEMPLATE_INSTANTIATION (decl)
11795 && is_member_template (DECL_TI_TEMPLATE (decl))))
11797 TYPE_HAS_INIT_REF (ctype) = 1;
11798 if (CP_TYPE_CONST_P (TREE_TYPE (parmtype)))
11799 TYPE_HAS_CONST_INIT_REF (ctype) = 1;
11803 A declaration of a constructor for a class X is ill-formed if its
11804 first parameter is of type (optionally cv-qualified) X and either
11805 there are no other parameters or else all other parameters have
11808 We *don't* complain about member template instantiations that
11809 have this form, though; they can occur as we try to decide what
11810 constructor to use during overload resolution. Since overload
11811 resolution will never prefer such a constructor to the
11812 non-template copy constructor (which is either explicitly or
11813 implicitly defined), there's no need to worry about their
11814 existence. Theoretically, they should never even be
11815 instantiated, but that's hard to forestall. */
11816 else if (TYPE_MAIN_VARIANT (parmtype) == ctype
11817 && (TREE_CHAIN (parmtypes) == NULL_TREE
11818 || TREE_CHAIN (parmtypes) == void_list_node
11819 || TREE_PURPOSE (TREE_CHAIN (parmtypes)))
11820 && !(DECL_TEMPLATE_INSTANTIATION (decl)
11821 && is_member_template (DECL_TI_TEMPLATE (decl))))
11823 cp_error ("invalid constructor; you probably meant `%T (const %T&)'",
11825 SET_IDENTIFIER_ERROR_LOCUS (DECL_NAME (decl), ctype);
11828 else if (TREE_CODE (parmtype) == VOID_TYPE
11829 || TREE_PURPOSE (parmtypes) != NULL_TREE)
11830 TYPE_HAS_DEFAULT_CONSTRUCTOR (ctype) = 1;
11835 /* An operator with this name can be either unary or binary. */
11841 return (name == ansi_opname [(int) INDIRECT_REF]
11842 || name == ansi_opname [(int) ADDR_EXPR]
11843 || name == ansi_opname [(int) NEGATE_EXPR]
11844 || name == ansi_opname[(int) POSTINCREMENT_EXPR]
11845 || name == ansi_opname[(int) POSTDECREMENT_EXPR]
11846 || name == ansi_opname [(int) CONVERT_EXPR]);
11849 /* An operator with this name can only be unary. */
11855 return (name == ansi_opname [(int) TRUTH_NOT_EXPR]
11856 || name == ansi_opname [(int) BIT_NOT_EXPR]
11857 || name == ansi_opname [(int) COMPONENT_REF]
11858 || IDENTIFIER_TYPENAME_P (name));
11861 /* Do a little sanity-checking on how they declared their operator. */
11864 grok_op_properties (decl, virtualp, friendp)
11866 int virtualp, friendp;
11868 tree argtypes = TYPE_ARG_TYPES (TREE_TYPE (decl));
11869 int methodp = (TREE_CODE (TREE_TYPE (decl)) == METHOD_TYPE);
11870 tree name = DECL_NAME (decl);
11872 if (current_class_type == NULL_TREE)
11879 A user-declared copy assignment operator X::operator= is a
11880 non-static non-template member function of class X with
11881 exactly one parameter of type X, X&, const X&, volatile X& or
11882 const volatile X&. */
11883 if (name == ansi_opname[(int) MODIFY_EXPR]
11884 && !(DECL_TEMPLATE_INSTANTIATION (decl)
11885 && is_member_template (DECL_TI_TEMPLATE (decl))))
11887 else if (name == ansi_opname[(int) CALL_EXPR])
11888 TYPE_OVERLOADS_CALL_EXPR (current_class_type) = 1;
11889 else if (name == ansi_opname[(int) ARRAY_REF])
11890 TYPE_OVERLOADS_ARRAY_REF (current_class_type) = 1;
11891 else if (name == ansi_opname[(int) COMPONENT_REF]
11892 || name == ansi_opname[(int) MEMBER_REF])
11893 TYPE_OVERLOADS_ARROW (current_class_type) = 1;
11894 else if (name == ansi_opname[(int) NEW_EXPR])
11895 TYPE_HAS_NEW_OPERATOR (current_class_type) = 1;
11896 else if (name == ansi_opname[(int) DELETE_EXPR])
11897 TYPE_GETS_DELETE (current_class_type) |= 1;
11898 else if (name == ansi_opname[(int) VEC_NEW_EXPR])
11899 TYPE_HAS_ARRAY_NEW_OPERATOR (current_class_type) = 1;
11900 else if (name == ansi_opname[(int) VEC_DELETE_EXPR])
11901 TYPE_GETS_DELETE (current_class_type) |= 2;
11904 if (name == ansi_opname[(int) NEW_EXPR]
11905 || name == ansi_opname[(int) VEC_NEW_EXPR])
11907 /* When the compiler encounters the definition of A::operator new, it
11908 doesn't look at the class declaration to find out if it's static. */
11910 revert_static_member_fn (&decl, NULL, NULL);
11912 /* Take care of function decl if we had syntax errors. */
11913 if (argtypes == NULL_TREE)
11915 = build_function_type (ptr_type_node,
11916 hash_tree_chain (integer_type_node,
11919 TREE_TYPE (decl) = coerce_new_type (TREE_TYPE (decl));
11921 else if (name == ansi_opname[(int) DELETE_EXPR]
11922 || name == ansi_opname[(int) VEC_DELETE_EXPR])
11925 revert_static_member_fn (&decl, NULL, NULL);
11927 if (argtypes == NULL_TREE)
11929 = build_function_type (void_type_node,
11930 hash_tree_chain (ptr_type_node,
11933 TREE_TYPE (decl) = coerce_delete_type (TREE_TYPE (decl));
11937 /* An operator function must either be a non-static member function
11938 or have at least one parameter of a class, a reference to a class,
11939 an enumeration, or a reference to an enumeration. 13.4.0.6 */
11940 if (! methodp || DECL_STATIC_FUNCTION_P (decl))
11942 if (IDENTIFIER_TYPENAME_P (name)
11943 || name == ansi_opname[(int) CALL_EXPR]
11944 || name == ansi_opname[(int) MODIFY_EXPR]
11945 || name == ansi_opname[(int) COMPONENT_REF]
11946 || name == ansi_opname[(int) ARRAY_REF])
11947 cp_error ("`%D' must be a nonstatic member function", decl);
11952 if (DECL_STATIC_FUNCTION_P (decl))
11953 cp_error ("`%D' must be either a non-static member function or a non-member function", decl);
11956 for (; TREE_CODE (TREE_VALUE (p)) != VOID_TYPE ; p = TREE_CHAIN (p))
11958 tree arg = TREE_VALUE (p);
11959 if (TREE_CODE (arg) == REFERENCE_TYPE)
11960 arg = TREE_TYPE (arg);
11962 /* This lets bad template code slip through. */
11963 if (IS_AGGR_TYPE (arg)
11964 || TREE_CODE (arg) == ENUMERAL_TYPE
11965 || TREE_CODE (arg) == TEMPLATE_TYPE_PARM
11966 || TREE_CODE (arg) == TEMPLATE_TEMPLATE_PARM)
11970 ("`%D' must have an argument of class or enumerated type",
11977 if (name == ansi_opname[(int) CALL_EXPR])
11978 return; /* No restrictions on args. */
11980 if (IDENTIFIER_TYPENAME_P (name) && ! DECL_TEMPLATE_INFO (decl))
11982 tree t = TREE_TYPE (name);
11983 if (TREE_CODE (t) == VOID_TYPE)
11984 pedwarn ("void is not a valid type conversion operator");
11985 else if (! friendp)
11987 int ref = (TREE_CODE (t) == REFERENCE_TYPE);
11988 const char *what = 0;
11990 t = TYPE_MAIN_VARIANT (TREE_TYPE (t));
11992 if (t == current_class_type)
11993 what = "the same type";
11994 /* Don't force t to be complete here. */
11995 else if (IS_AGGR_TYPE (t)
11997 && DERIVED_FROM_P (t, current_class_type))
11998 what = "a base class";
12001 warning ("conversion to %s%s will never use a type conversion operator",
12002 ref ? "a reference to " : "", what);
12006 if (name == ansi_opname[(int) MODIFY_EXPR])
12010 if (list_length (argtypes) != 3 && methodp)
12012 cp_error ("`%D' must take exactly one argument", decl);
12015 parmtype = TREE_VALUE (TREE_CHAIN (argtypes));
12017 if (copy_assignment_arg_p (parmtype, virtualp)
12020 TYPE_HAS_ASSIGN_REF (current_class_type) = 1;
12021 if (TREE_CODE (parmtype) != REFERENCE_TYPE
12022 || CP_TYPE_CONST_P (TREE_TYPE (parmtype)))
12023 TYPE_HAS_CONST_ASSIGN_REF (current_class_type) = 1;
12026 else if (name == ansi_opname[(int) COND_EXPR])
12029 cp_error ("ISO C++ prohibits overloading operator ?:");
12031 else if (ambi_op_p (name))
12033 if (list_length (argtypes) == 2)
12035 else if (list_length (argtypes) == 3)
12037 if ((name == ansi_opname[(int) POSTINCREMENT_EXPR]
12038 || name == ansi_opname[(int) POSTDECREMENT_EXPR])
12039 && ! processing_template_decl
12040 && ! same_type_p (TREE_VALUE (TREE_CHAIN (argtypes)), integer_type_node))
12043 cp_error ("postfix `%D' must take `int' as its argument",
12047 ("postfix `%D' must take `int' as its second argument",
12054 cp_error ("`%D' must take either zero or one argument", decl);
12056 cp_error ("`%D' must take either one or two arguments", decl);
12059 /* More Effective C++ rule 6. */
12061 && (name == ansi_opname[(int) POSTINCREMENT_EXPR]
12062 || name == ansi_opname[(int) POSTDECREMENT_EXPR]))
12064 tree arg = TREE_VALUE (argtypes);
12065 tree ret = TREE_TYPE (TREE_TYPE (decl));
12066 if (methodp || TREE_CODE (arg) == REFERENCE_TYPE)
12067 arg = TREE_TYPE (arg);
12068 arg = TYPE_MAIN_VARIANT (arg);
12069 if (list_length (argtypes) == 2)
12071 if (TREE_CODE (ret) != REFERENCE_TYPE
12072 || !same_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (ret)),
12074 cp_warning ("prefix `%D' should return `%T'", decl,
12075 build_reference_type (arg));
12079 if (!same_type_p (TYPE_MAIN_VARIANT (ret), arg))
12080 cp_warning ("postfix `%D' should return `%T'", decl, arg);
12084 else if (unary_op_p (name))
12086 if (list_length (argtypes) != 2)
12089 cp_error ("`%D' must take `void'", decl);
12091 cp_error ("`%D' must take exactly one argument", decl);
12094 else /* if (binary_op_p (name)) */
12096 if (list_length (argtypes) != 3)
12099 cp_error ("`%D' must take exactly one argument", decl);
12101 cp_error ("`%D' must take exactly two arguments", decl);
12104 /* More Effective C++ rule 7. */
12106 && (name == ansi_opname [TRUTH_ANDIF_EXPR]
12107 || name == ansi_opname [TRUTH_ORIF_EXPR]
12108 || name == ansi_opname [COMPOUND_EXPR]))
12109 cp_warning ("user-defined `%D' always evaluates both arguments",
12113 /* Effective C++ rule 23. */
12115 && list_length (argtypes) == 3
12116 && (name == ansi_opname [PLUS_EXPR]
12117 || name == ansi_opname [MINUS_EXPR]
12118 || name == ansi_opname [TRUNC_DIV_EXPR]
12119 || name == ansi_opname [MULT_EXPR])
12120 && TREE_CODE (TREE_TYPE (TREE_TYPE (decl))) == REFERENCE_TYPE)
12121 cp_warning ("`%D' should return by value", decl);
12125 for (; argtypes != void_list_node ; argtypes = TREE_CHAIN (argtypes))
12126 if (TREE_PURPOSE (argtypes))
12128 TREE_PURPOSE (argtypes) = NULL_TREE;
12129 if (name == ansi_opname[(int) POSTINCREMENT_EXPR]
12130 || name == ansi_opname[(int) POSTDECREMENT_EXPR])
12133 cp_pedwarn ("`%D' cannot have default arguments", decl);
12136 cp_error ("`%D' cannot have default arguments", decl);
12141 static const char *
12143 enum tag_types code;
12156 my_friendly_abort (981122);
12160 /* Get the struct, enum or union (CODE says which) with tag NAME.
12161 Define the tag as a forward-reference if it is not defined.
12163 C++: If a class derivation is given, process it here, and report
12164 an error if multiple derivation declarations are not identical.
12166 If this is a definition, come in through xref_tag and only look in
12167 the current frame for the name (since C++ allows new names in any
12171 xref_tag (code_type_node, name, globalize)
12172 tree code_type_node;
12176 enum tag_types tag_code;
12177 enum tree_code code;
12178 register tree ref, t;
12179 struct binding_level *b = current_binding_level;
12181 tree attributes = NULL_TREE;
12182 tree context = NULL_TREE;
12184 /* If we are called from the parser, code_type_node will sometimes be a
12185 TREE_LIST. This indicates that the user wrote
12186 "class __attribute__ ((foo)) bar". Extract the attributes so we can
12188 if (TREE_CODE (code_type_node) == TREE_LIST)
12190 attributes = TREE_PURPOSE (code_type_node);
12191 code_type_node = TREE_VALUE (code_type_node);
12194 tag_code = (enum tag_types) TREE_INT_CST_LOW (code_type_node);
12199 code = RECORD_TYPE;
12205 code = ENUMERAL_TYPE;
12208 my_friendly_abort (18);
12211 /* If a cross reference is requested, look up the type
12212 already defined for this tag and return it. */
12213 if (TREE_CODE_CLASS (TREE_CODE (name)) == 't')
12216 name = TYPE_IDENTIFIER (t);
12220 t = IDENTIFIER_TYPE_VALUE (name);
12222 if (t && TREE_CODE (t) != code && TREE_CODE (t) != TEMPLATE_TYPE_PARM
12223 && TREE_CODE (t) != TEMPLATE_TEMPLATE_PARM)
12228 /* If we know we are defining this tag, only look it up in
12229 this scope and don't try to find it as a type. */
12230 ref = lookup_tag (code, name, b, 1);
12236 /* [dcl.type.elab] If the identifier resolves to a
12237 typedef-name or a template type-parameter, the
12238 elaborated-type-specifier is ill-formed. */
12239 if (t != TYPE_MAIN_VARIANT (t)
12240 || (CLASS_TYPE_P (t) && TYPE_WAS_ANONYMOUS (t)))
12241 cp_pedwarn ("using typedef-name `%D' after `%s'",
12242 TYPE_NAME (t), tag_name (tag_code));
12243 else if (TREE_CODE (t) == TEMPLATE_TYPE_PARM)
12244 cp_error ("using template type parameter `%T' after `%s'",
12245 t, tag_name (tag_code));
12250 ref = lookup_tag (code, name, b, 0);
12254 /* Try finding it as a type declaration. If that wins,
12256 ref = lookup_name (name, 1);
12258 if (ref != NULL_TREE
12259 && processing_template_decl
12260 && DECL_CLASS_TEMPLATE_P (ref)
12261 && template_class_depth (current_class_type) == 0)
12262 /* Since GLOBALIZE is true, we're declaring a global
12263 template, so we want this type. */
12264 ref = DECL_RESULT (ref);
12266 if (ref && TREE_CODE (ref) == TYPE_DECL
12267 && TREE_CODE (TREE_TYPE (ref)) == code)
12268 ref = TREE_TYPE (ref);
12273 if (ref && current_class_type
12274 && template_class_depth (current_class_type)
12275 && PROCESSING_REAL_TEMPLATE_DECL_P ())
12277 /* Since GLOBALIZE is non-zero, we are not looking at a
12278 definition of this tag. Since, in addition, we are currently
12279 processing a (member) template declaration of a template
12280 class, we must be very careful; consider:
12287 { template <class V>
12288 friend struct S1; };
12290 Here, the S2::S1 declaration should not be confused with the
12291 outer declaration. In particular, the inner version should
12292 have a template parameter of level 2, not level 1. This
12293 would be particularly important if the member declaration
12296 template <class V = U> friend struct S1;
12298 say, when we should tsubst into `U' when instantiating
12299 S2. On the other hand, when presented with:
12309 we must find the inner binding eventually. We
12310 accomplish this by making sure that the new type we
12311 create to represent this declaration has the right
12313 context = TYPE_CONTEXT (ref);
12320 /* If no such tag is yet defined, create a forward-reference node
12321 and record it as the "definition".
12322 When a real declaration of this type is found,
12323 the forward-reference will be altered into a real type. */
12324 if (code == ENUMERAL_TYPE)
12326 cp_error ("use of enum `%#D' without previous declaration", name);
12328 ref = make_node (ENUMERAL_TYPE);
12330 /* Give the type a default layout like unsigned int
12331 to avoid crashing if it does not get defined. */
12332 TYPE_MODE (ref) = TYPE_MODE (unsigned_type_node);
12333 TYPE_ALIGN (ref) = TYPE_ALIGN (unsigned_type_node);
12334 TREE_UNSIGNED (ref) = 1;
12335 TYPE_PRECISION (ref) = TYPE_PRECISION (unsigned_type_node);
12336 TYPE_MIN_VALUE (ref) = TYPE_MIN_VALUE (unsigned_type_node);
12337 TYPE_MAX_VALUE (ref) = TYPE_MAX_VALUE (unsigned_type_node);
12339 /* Enable us to recognize when a type is created in class context.
12340 To do nested classes correctly, this should probably be cleared
12341 out when we leave this classes scope. Currently this in only
12342 done in `start_enum'. */
12344 pushtag (name, ref, globalize);
12348 struct binding_level *old_b = class_binding_level;
12350 ref = make_aggr_type (code);
12351 TYPE_CONTEXT (ref) = context;
12353 #ifdef NONNESTED_CLASSES
12354 /* Class types don't nest the way enums do. */
12355 class_binding_level = (struct binding_level *)0;
12357 pushtag (name, ref, globalize);
12358 class_binding_level = old_b;
12363 if (!globalize && processing_template_decl && IS_AGGR_TYPE (ref))
12364 redeclare_class_template (ref, current_template_parms);
12367 /* Until the type is defined, tentatively accept whatever
12368 structure tag the user hands us. */
12369 if (TYPE_SIZE (ref) == NULL_TREE
12370 && ref != current_class_type
12371 /* Have to check this, in case we have contradictory tag info. */
12372 && IS_AGGR_TYPE_CODE (TREE_CODE (ref)))
12374 if (tag_code == class_type)
12375 CLASSTYPE_DECLARED_CLASS (ref) = 1;
12376 else if (tag_code == record_type)
12377 CLASSTYPE_DECLARED_CLASS (ref) = 0;
12380 TREE_TYPE (ref) = attributes;
12386 xref_tag_from_type (old, id, globalize)
12390 tree code_type_node;
12392 if (TREE_CODE (old) == RECORD_TYPE)
12393 code_type_node = (CLASSTYPE_DECLARED_CLASS (old)
12394 ? class_type_node : record_type_node);
12396 code_type_node = union_type_node;
12398 if (id == NULL_TREE)
12399 id = TYPE_IDENTIFIER (old);
12401 return xref_tag (code_type_node, id, globalize);
12404 /* REF is a type (named NAME), for which we have just seen some
12405 baseclasses. BINFO is a list of those baseclasses; the
12406 TREE_PURPOSE is an access_* node, and the TREE_VALUE is the type of
12407 the base-class. CODE_TYPE_NODE indicates whether REF is a class,
12408 struct, or union. */
12411 xref_basetypes (code_type_node, name, ref, binfo)
12412 tree code_type_node;
12416 /* In the declaration `A : X, Y, ... Z' we mark all the types
12417 (A, X, Y, ..., Z) so we can check for duplicates. */
12422 enum tag_types tag_code = (enum tag_types) TREE_INT_CST_LOW (code_type_node);
12424 if (tag_code == union_type)
12426 cp_error ("derived union `%T' invalid", ref);
12430 len = list_length (binfo);
12432 /* First, make sure that any templates in base-classes are
12433 instantiated. This ensures that if we call ourselves recursively
12434 we do not get confused about which classes are marked and which
12436 for (base = binfo; base; base = TREE_CHAIN (base))
12437 complete_type (TREE_VALUE (base));
12439 SET_CLASSTYPE_MARKED (ref);
12440 BINFO_BASETYPES (TYPE_BINFO (ref)) = binfos = make_tree_vec (len);
12442 for (i = 0; binfo; binfo = TREE_CHAIN (binfo))
12444 /* The base of a derived struct is public by default. */
12446 = (TREE_PURPOSE (binfo) == access_public_node
12447 || TREE_PURPOSE (binfo) == access_public_virtual_node
12448 || (tag_code != class_type
12449 && (TREE_PURPOSE (binfo) == access_default_node
12450 || TREE_PURPOSE (binfo) == access_default_virtual_node)));
12452 = (TREE_PURPOSE (binfo) == access_protected_node
12453 || TREE_PURPOSE (binfo) == access_protected_virtual_node);
12455 = (TREE_PURPOSE (binfo) == access_private_virtual_node
12456 || TREE_PURPOSE (binfo) == access_protected_virtual_node
12457 || TREE_PURPOSE (binfo) == access_public_virtual_node
12458 || TREE_PURPOSE (binfo) == access_default_virtual_node);
12459 tree basetype = TREE_VALUE (binfo);
12462 if (basetype && TREE_CODE (basetype) == TYPE_DECL)
12463 basetype = TREE_TYPE (basetype);
12465 || (TREE_CODE (basetype) != RECORD_TYPE
12466 && TREE_CODE (basetype) != TYPENAME_TYPE
12467 && TREE_CODE (basetype) != TEMPLATE_TYPE_PARM
12468 && TREE_CODE (basetype) != TEMPLATE_TEMPLATE_PARM))
12470 cp_error ("base type `%T' fails to be a struct or class type",
12471 TREE_VALUE (binfo));
12475 GNU_xref_hier (name, basetype, via_public, via_virtual, 0);
12477 /* This code replaces similar code in layout_basetypes.
12478 We put the complete_type first for implicit `typename'. */
12479 if (TYPE_SIZE (basetype) == NULL_TREE
12480 && ! (current_template_parms && uses_template_parms (basetype)))
12482 cp_error ("base class `%T' has incomplete type", basetype);
12487 if (CLASSTYPE_MARKED (basetype))
12489 if (basetype == ref)
12490 cp_error ("recursive type `%T' undefined", basetype);
12492 cp_error ("duplicate base type `%T' invalid", basetype);
12496 if (TYPE_FOR_JAVA (basetype)
12497 && (current_lang_stack
12498 == &VARRAY_TREE (current_lang_base, 0)))
12499 TYPE_FOR_JAVA (ref) = 1;
12501 /* Note that the BINFO records which describe individual
12502 inheritances are *not* shared in the lattice! They
12503 cannot be shared because a given baseclass may be
12504 inherited with different `accessibility' by different
12505 derived classes. (Each BINFO record describing an
12506 individual inheritance contains flags which say what
12507 the `accessibility' of that particular inheritance is.) */
12510 = make_binfo (size_zero_node, basetype,
12511 CLASS_TYPE_P (basetype)
12512 ? TYPE_BINFO_VTABLE (basetype) : NULL_TREE,
12513 CLASS_TYPE_P (basetype)
12514 ? TYPE_BINFO_VIRTUALS (basetype) : NULL_TREE);
12516 TREE_VEC_ELT (binfos, i) = base_binfo;
12517 TREE_VIA_PUBLIC (base_binfo) = via_public;
12518 TREE_VIA_PROTECTED (base_binfo) = via_protected;
12519 TREE_VIA_VIRTUAL (base_binfo) = via_virtual;
12520 BINFO_INHERITANCE_CHAIN (base_binfo) = TYPE_BINFO (ref);
12522 /* We need to unshare the binfos now so that lookups during class
12523 definition work. */
12524 unshare_base_binfos (base_binfo);
12526 SET_CLASSTYPE_MARKED (basetype);
12528 /* We are free to modify these bits because they are meaningless
12529 at top level, and BASETYPE is a top-level type. */
12530 if (via_virtual || TYPE_USES_VIRTUAL_BASECLASSES (basetype))
12532 TYPE_USES_VIRTUAL_BASECLASSES (ref) = 1;
12533 /* Converting to a virtual base class requires looking
12534 up the offset of the virtual base. */
12535 TYPE_BASE_CONVS_MAY_REQUIRE_CODE_P (ref) = 1;
12538 if (CLASS_TYPE_P (basetype))
12540 TYPE_HAS_NEW_OPERATOR (ref)
12541 |= TYPE_HAS_NEW_OPERATOR (basetype);
12542 TYPE_HAS_ARRAY_NEW_OPERATOR (ref)
12543 |= TYPE_HAS_ARRAY_NEW_OPERATOR (basetype);
12544 TYPE_GETS_DELETE (ref) |= TYPE_GETS_DELETE (basetype);
12545 /* If the base-class uses multiple inheritance, so do we. */
12546 TYPE_USES_MULTIPLE_INHERITANCE (ref)
12547 |= TYPE_USES_MULTIPLE_INHERITANCE (basetype);
12548 /* Likewise, if converting to a base of the base may require
12549 code, then we may need to generate code to convert to a
12551 TYPE_BASE_CONVS_MAY_REQUIRE_CODE_P (ref)
12552 |= TYPE_BASE_CONVS_MAY_REQUIRE_CODE_P (basetype);
12559 TREE_VEC_LENGTH (binfos) = i;
12561 BINFO_BASETYPES (TYPE_BINFO (ref)) = NULL_TREE;
12565 TYPE_USES_MULTIPLE_INHERITANCE (ref) = 1;
12566 /* If there is more than one non-empty they cannot be at the same
12568 TYPE_BASE_CONVS_MAY_REQUIRE_CODE_P (ref) = 1;
12571 /* Unmark all the types. */
12573 CLEAR_CLASSTYPE_MARKED (BINFO_TYPE (TREE_VEC_ELT (binfos, i)));
12574 CLEAR_CLASSTYPE_MARKED (ref);
12576 /* Now that we know all the base-classes, set up the list of virtual
12578 get_vbase_types (ref);
12582 /* Begin compiling the definition of an enumeration type.
12583 NAME is its name (or null if anonymous).
12584 Returns the type object, as yet incomplete.
12585 Also records info about it so that build_enumerator
12586 may be used to declare the individual values as they are read. */
12592 register tree enumtype = NULL_TREE;
12593 struct binding_level *b = current_binding_level;
12595 /* If this is the real definition for a previous forward reference,
12596 fill in the contents in the same object that used to be the
12597 forward reference. */
12599 if (name != NULL_TREE)
12600 enumtype = lookup_tag (ENUMERAL_TYPE, name, b, 1);
12602 if (enumtype != NULL_TREE && TREE_CODE (enumtype) == ENUMERAL_TYPE)
12604 cp_error ("multiple definition of `%#T'", enumtype);
12605 cp_error_at ("previous definition here", enumtype);
12606 /* Clear out TYPE_VALUES, and start again. */
12607 TYPE_VALUES (enumtype) = NULL_TREE;
12611 enumtype = make_node (ENUMERAL_TYPE);
12612 pushtag (name, enumtype, 0);
12615 if (current_class_type)
12616 TREE_ADDRESSABLE (b->tags) = 1;
12618 GNU_xref_decl (current_function_decl, enumtype);
12622 /* After processing and defining all the values of an enumeration type,
12623 install their decls in the enumeration type and finish it off.
12624 ENUMTYPE is the type object and VALUES a list of name-value pairs.
12625 Returns ENUMTYPE. */
12628 finish_enum (enumtype)
12631 register tree minnode = NULL_TREE, maxnode = NULL_TREE;
12632 /* Calculate the maximum value of any enumerator in this type. */
12634 tree values = TYPE_VALUES (enumtype);
12639 for (pair = values; pair; pair = TREE_CHAIN (pair))
12644 /* The TREE_VALUE is a CONST_DECL for this enumeration
12646 decl = TREE_VALUE (pair);
12650 Following the closing brace of an enum-specifier, each
12651 enumerator has the type of its enumeration. Prior to the
12652 closing brace, the type of each enumerator is the type of
12653 its initializing value. */
12654 TREE_TYPE (decl) = enumtype;
12656 /* The DECL_INITIAL will be NULL if we are processing a
12657 template declaration and this enumeration constant had no
12658 explicit initializer. */
12659 value = DECL_INITIAL (decl);
12660 if (value && !processing_template_decl)
12662 /* Set the TREE_TYPE for the VALUE as well. That's so
12663 that when we call decl_constant_value we get an
12664 entity of the right type (but with the constant
12665 value). Since we shouldn't ever call
12666 decl_constant_value on a template type, there's no
12667 reason to do that when processing_template_decl.
12668 And, if the expression is something like a
12669 TEMPLATE_PARM_INDEX or a CAST_EXPR doing so will
12670 wreak havoc on the intended type of the expression.
12672 Of course, there's also no point in trying to compute
12673 minimum or maximum values if we're in a template. */
12674 TREE_TYPE (value) = enumtype;
12677 minnode = maxnode = value;
12678 else if (tree_int_cst_lt (maxnode, value))
12680 else if (tree_int_cst_lt (value, minnode))
12684 if (processing_template_decl)
12685 /* If this is just a template, leave the CONST_DECL
12686 alone. That way tsubst_copy will find CONST_DECLs for
12687 CONST_DECLs, and not INTEGER_CSTs. */
12690 /* In the list we're building up, we want the enumeration
12691 values, not the CONST_DECLs. */
12692 TREE_VALUE (pair) = value;
12696 maxnode = minnode = integer_zero_node;
12698 TYPE_VALUES (enumtype) = nreverse (values);
12700 if (processing_template_decl)
12702 tree scope = current_scope ();
12703 if (scope && TREE_CODE (scope) == FUNCTION_DECL)
12704 add_tree (build_min (TAG_DEFN, enumtype));
12708 int unsignedp = tree_int_cst_sgn (minnode) >= 0;
12709 int lowprec = min_precision (minnode, unsignedp);
12710 int highprec = min_precision (maxnode, unsignedp);
12711 int precision = MAX (lowprec, highprec);
12714 TYPE_SIZE (enumtype) = NULL_TREE;
12716 /* Set TYPE_MIN_VALUE and TYPE_MAX_VALUE according to `precision'. */
12718 TYPE_PRECISION (enumtype) = precision;
12720 fixup_unsigned_type (enumtype);
12722 fixup_signed_type (enumtype);
12724 if (flag_short_enums || (precision > TYPE_PRECISION (integer_type_node)))
12725 /* Use the width of the narrowest normal C type which is wide
12727 TYPE_PRECISION (enumtype) = TYPE_PRECISION (type_for_size
12730 TYPE_PRECISION (enumtype) = TYPE_PRECISION (integer_type_node);
12732 TYPE_SIZE (enumtype) = 0;
12733 layout_type (enumtype);
12735 /* Fix up all variant types of this enum type. */
12736 for (tem = TYPE_MAIN_VARIANT (enumtype); tem;
12737 tem = TYPE_NEXT_VARIANT (tem))
12739 TYPE_VALUES (tem) = TYPE_VALUES (enumtype);
12740 TYPE_MIN_VALUE (tem) = TYPE_MIN_VALUE (enumtype);
12741 TYPE_MAX_VALUE (tem) = TYPE_MAX_VALUE (enumtype);
12742 TYPE_SIZE (tem) = TYPE_SIZE (enumtype);
12743 TYPE_SIZE_UNIT (tem) = TYPE_SIZE_UNIT (enumtype);
12744 TYPE_MODE (tem) = TYPE_MODE (enumtype);
12745 TYPE_PRECISION (tem) = TYPE_PRECISION (enumtype);
12746 TYPE_ALIGN (tem) = TYPE_ALIGN (enumtype);
12747 TREE_UNSIGNED (tem) = TREE_UNSIGNED (enumtype);
12750 /* Finish debugging output for this type. */
12751 rest_of_type_compilation (enumtype, namespace_bindings_p ());
12757 /* Build and install a CONST_DECL for an enumeration constant of the
12758 enumeration type ENUMTYPE whose NAME and VALUE (if any) are provided.
12759 Assignment of sequential values by default is handled here. */
12762 build_enumerator (name, value, enumtype)
12772 /* Remove no-op casts from the value. */
12774 STRIP_TYPE_NOPS (value);
12776 if (! processing_template_decl)
12778 /* Validate and default VALUE. */
12779 if (value != NULL_TREE)
12781 if (TREE_READONLY_DECL_P (value))
12782 value = decl_constant_value (value);
12784 if (TREE_CODE (value) == INTEGER_CST)
12786 value = default_conversion (value);
12787 constant_expression_warning (value);
12791 cp_error ("enumerator value for `%D' not integer constant", name);
12796 /* Default based on previous value. */
12797 if (value == NULL_TREE && ! processing_template_decl)
12801 if (TYPE_VALUES (enumtype))
12803 /* The next value is the previous value ... */
12804 prev_value = DECL_INITIAL (TREE_VALUE (TYPE_VALUES (enumtype)));
12805 /* ... plus one. */
12806 value = build_binary_op (PLUS_EXPR,
12810 if (tree_int_cst_lt (value, prev_value))
12811 cp_error ("overflow in enumeration values at `%D'", name);
12814 value = integer_zero_node;
12817 /* Remove no-op casts from the value. */
12819 STRIP_TYPE_NOPS (value);
12821 /* To fix MAX_VAL enum consts. (bkoz) */
12822 TREE_TYPE (value) = integer_type_node;
12826 /* We always have to copy here; not all INTEGER_CSTs are unshared.
12827 Even in other cases, we will later (in finish_enum) be setting
12828 the type of VALUE. But, we don't need to make a copy if this
12829 VALUE is one of the enumeration constants for this same
12830 enumeration type. */
12831 for (values = TYPE_VALUES (enumtype); values; values = TREE_CHAIN (values))
12832 if (TREE_VALUE (values) == value)
12834 /* If we didn't break out of the loop, then we do need a copy. */
12835 if (!values && value)
12836 value = copy_node (value);
12838 /* C++ associates enums with global, function, or class declarations. */
12839 context = current_scope ();
12841 /* Build the actual enumeration constant. Note that the enumeration
12842 constants have the type of their initializers until the
12843 enumeration is complete:
12847 Following the closing brace of an enum-specifier, each enumer-
12848 ator has the type of its enumeration. Prior to the closing
12849 brace, the type of each enumerator is the type of its
12850 initializing value.
12852 In finish_enum we will reset the type. Of course, if we're
12853 processing a template, there may be no value. */
12854 type = value ? TREE_TYPE (value) : NULL_TREE;
12856 if (context && context == current_class_type)
12857 /* This enum declaration is local to the class. We need the full
12858 lang_decl so that we can record DECL_CLASS_CONTEXT, for example. */
12859 decl = build_lang_decl (CONST_DECL, name, type);
12861 /* It's a global enum, or it's local to a function. (Note local to
12862 a function could mean local to a class method. */
12863 decl = build_decl (CONST_DECL, name, type);
12865 DECL_CONTEXT (decl) = FROB_CONTEXT (context);
12866 DECL_INITIAL (decl) = value;
12867 TREE_READONLY (decl) = 1;
12869 if (context && context == current_class_type)
12870 /* In something like `struct S { enum E { i = 7 }; };' we put `i'
12871 on the TYPE_FIELDS list for `S'. (That's so that you can say
12872 things like `S::i' later.) */
12873 finish_member_declaration (decl);
12877 GNU_xref_decl (current_function_decl, decl);
12880 /* Add this enumeration constant to the list for this type. */
12881 TYPE_VALUES (enumtype) = tree_cons (name, decl, TYPE_VALUES (enumtype));
12885 static int function_depth;
12887 /* We're defining DECL. Make sure that it's type is OK. */
12890 check_function_type (decl)
12893 tree fntype = TREE_TYPE (decl);
12895 /* In a function definition, arg types must be complete. */
12896 require_complete_types_for_parms (current_function_parms);
12898 if (TYPE_SIZE (complete_type (TREE_TYPE (fntype))) == NULL_TREE)
12900 cp_error ("return type `%#T' is incomplete", TREE_TYPE (fntype));
12902 /* Make it return void instead, but don't change the
12903 type of the DECL_RESULT, in case we have a named return value. */
12904 if (TREE_CODE (fntype) == METHOD_TYPE)
12906 tree ctype = TREE_TYPE (TREE_VALUE (TYPE_ARG_TYPES (fntype)));
12908 = build_cplus_method_type (ctype,
12910 FUNCTION_ARG_CHAIN (decl));
12914 = build_function_type (void_type_node,
12915 TYPE_ARG_TYPES (TREE_TYPE (decl)));
12917 = build_exception_variant (fntype,
12918 TYPE_RAISES_EXCEPTIONS (fntype));
12921 abstract_virtuals_error (decl, TREE_TYPE (fntype));
12924 /* Create the FUNCTION_DECL for a function definition.
12925 DECLSPECS and DECLARATOR are the parts of the declaration;
12926 they describe the function's name and the type it returns,
12927 but twisted together in a fashion that parallels the syntax of C.
12929 FLAGS is a bitwise or of SF_PRE_PARSED (indicating that the
12930 DECLARATOR is really the DECL for the function we are about to
12931 process and that DECLSPECS should be ignored), SF_INCLASS_INLINE
12932 indicating that the function is an inline defined in-class, and
12933 SF_EXPAND indicating that we should generate RTL for this
12936 This function creates a binding context for the function body
12937 as well as setting up the FUNCTION_DECL in current_function_decl.
12939 Returns 1 on success. If the DECLARATOR is not suitable for a function
12940 (it defines a datum instead), we return 0, which tells
12941 yyparse to report a parse error.
12943 For C++, we must first check whether that datum makes any sense.
12944 For example, "class A local_a(1,2);" means that variable local_a
12945 is an aggregate of type A, which should have a constructor
12946 applied to it with the argument list [1, 2]. */
12949 start_function (declspecs, declarator, attrs, flags)
12950 tree declspecs, declarator, attrs;
12954 tree ctype = NULL_TREE;
12957 extern int have_extern_spec;
12958 extern int used_extern_spec;
12959 int doing_friend = 0;
12960 struct binding_level *bl;
12962 /* Sanity check. */
12963 my_friendly_assert (TREE_CODE (TREE_VALUE (void_list_node)) == VOID_TYPE, 160);
12964 my_friendly_assert (TREE_CHAIN (void_list_node) == NULL_TREE, 161);
12966 /* This should only be done once on the top most decl. */
12967 if (have_extern_spec && !used_extern_spec)
12969 declspecs = decl_tree_cons (NULL_TREE, get_identifier ("extern"), declspecs);
12970 used_extern_spec = 1;
12973 if (flags & SF_PRE_PARSED)
12975 decl1 = declarator;
12977 fntype = TREE_TYPE (decl1);
12978 if (TREE_CODE (fntype) == METHOD_TYPE)
12979 ctype = TYPE_METHOD_BASETYPE (fntype);
12981 /* ISO C++ 11.4/5. A friend function defined in a class is in
12982 the (lexical) scope of the class in which it is defined. */
12983 if (!ctype && DECL_FRIEND_P (decl1))
12985 ctype = DECL_FRIEND_CONTEXT (decl1);
12987 /* CTYPE could be null here if we're dealing with a template;
12988 for example, `inline friend float foo()' inside a template
12989 will have no CTYPE set. */
12990 if (ctype && TREE_CODE (ctype) != RECORD_TYPE)
12996 last_function_parms = DECL_ARGUMENTS (decl1);
12997 last_function_parm_tags = NULL_TREE;
13001 decl1 = grokdeclarator (declarator, declspecs, FUNCDEF, 1, NULL_TREE);
13002 /* If the declarator is not suitable for a function definition,
13003 cause a syntax error. */
13004 if (decl1 == NULL_TREE || TREE_CODE (decl1) != FUNCTION_DECL) return 0;
13006 fntype = TREE_TYPE (decl1);
13008 restype = TREE_TYPE (fntype);
13009 if (CLASS_TYPE_P (restype) && !CLASSTYPE_GOT_SEMICOLON (restype))
13011 cp_error ("semicolon missing after declaration of `%#T'", restype);
13012 shadow_tag (build_tree_list (NULL_TREE, restype));
13013 CLASSTYPE_GOT_SEMICOLON (restype) = 1;
13014 if (TREE_CODE (fntype) == FUNCTION_TYPE)
13015 fntype = build_function_type (integer_type_node,
13016 TYPE_ARG_TYPES (fntype));
13018 fntype = build_cplus_method_type (build_type_variant (TYPE_METHOD_BASETYPE (fntype), TREE_READONLY (decl1), TREE_SIDE_EFFECTS (decl1)),
13020 TYPE_ARG_TYPES (fntype));
13021 TREE_TYPE (decl1) = fntype;
13024 if (TREE_CODE (fntype) == METHOD_TYPE)
13025 ctype = TYPE_METHOD_BASETYPE (fntype);
13026 else if (DECL_MAIN_P (decl1))
13028 /* If this doesn't return integer_type, complain. */
13029 if (TREE_TYPE (TREE_TYPE (decl1)) != integer_type_node)
13031 if (pedantic || warn_return_type)
13032 pedwarn ("return type for `main' changed to `int'");
13033 TREE_TYPE (decl1) = fntype = default_function_type;
13038 /* Sometimes we don't notice that a function is a static member, and
13039 build a METHOD_TYPE for it. Fix that up now. */
13040 if (ctype != NULL_TREE && DECL_STATIC_FUNCTION_P (decl1)
13041 && TREE_CODE (TREE_TYPE (decl1)) == METHOD_TYPE)
13043 revert_static_member_fn (&decl1, NULL, NULL);
13044 last_function_parms = TREE_CHAIN (last_function_parms);
13048 /* Warn if function was previously implicitly declared
13049 (but not if we warned then). */
13050 if (! warn_implicit
13051 && IDENTIFIER_IMPLICIT_DECL (DECL_NAME (decl1)) != NULL_TREE)
13052 cp_warning_at ("`%D' implicitly declared before its definition", IDENTIFIER_IMPLICIT_DECL (DECL_NAME (decl1)));
13054 /* Set up current_class_type, and enter the scope of the class, if
13057 push_nested_class (ctype, 1);
13058 else if (DECL_STATIC_FUNCTION_P (decl1))
13059 push_nested_class (DECL_CONTEXT (decl1), 2);
13061 /* Now that we have entered the scope of the class, we must restore
13062 the bindings for any template parameters surrounding DECL1, if it
13063 is an inline member template. (Order is important; consider the
13064 case where a template parameter has the same name as a field of
13065 the class.) It is not until after this point that
13066 PROCESSING_TEMPLATE_DECL is guaranteed to be set up correctly. */
13067 if (flags & SF_INCLASS_INLINE)
13068 maybe_begin_member_template_processing (decl1);
13070 /* Effective C++ rule 15. See also c_expand_return. */
13072 && DECL_NAME (decl1) == ansi_opname[(int) MODIFY_EXPR]
13073 && TREE_CODE (TREE_TYPE (fntype)) == VOID_TYPE)
13074 cp_warning ("`operator=' should return a reference to `*this'");
13076 /* Make the init_value nonzero so pushdecl knows this is not tentative.
13077 error_mark_node is replaced below (in poplevel) with the BLOCK. */
13078 if (!DECL_INITIAL (decl1))
13079 DECL_INITIAL (decl1) = error_mark_node;
13081 #ifdef SET_DEFAULT_DECL_ATTRIBUTES
13082 SET_DEFAULT_DECL_ATTRIBUTES (decl1, attrs);
13085 /* This function exists in static storage.
13086 (This does not mean `static' in the C sense!) */
13087 TREE_STATIC (decl1) = 1;
13089 /* We must call push_template_decl after current_class_type is set
13090 up. (If we are processing inline definitions after exiting a
13091 class scope, current_class_type will be NULL_TREE until set above
13092 by push_nested_class.) */
13093 if (processing_template_decl)
13094 decl1 = push_template_decl (decl1);
13096 /* We are now in the scope of the function being defined. */
13097 current_function_decl = decl1;
13099 /* Save the parm names or decls from this function's declarator
13100 where store_parm_decls will find them. */
13101 current_function_parms = last_function_parms;
13102 current_function_parm_tags = last_function_parm_tags;
13104 /* Make sure the parameter and return types are reasonable. When
13105 you declare a function, these types can be incomplete, but they
13106 must be complete when you define the function. */
13107 if (! processing_template_decl)
13108 check_function_type (decl1);
13110 /* Build the return declaration for the function. */
13111 restype = TREE_TYPE (fntype);
13112 if (!processing_template_decl)
13114 if (!DECL_RESULT (decl1))
13116 DECL_RESULT (decl1)
13117 = build_decl (RESULT_DECL, 0, TYPE_MAIN_VARIANT (restype));
13118 c_apply_type_quals_to_decl (CP_TYPE_QUALS (restype),
13119 DECL_RESULT (decl1));
13123 /* Just use `void'. Nobody will ever look at this anyhow. */
13124 DECL_RESULT (decl1) = build_decl (RESULT_DECL, 0, void_type_node);
13126 /* Initialize RTL machinery. We cannot do this until
13127 CURRENT_FUNCTION_DECL and DECL_RESULT are set up. We do this
13128 even when processing a template; this is how we get
13129 CFUN set up, and our per-function variables initialized. */
13130 bl = current_binding_level;
13131 init_function_start (decl1, input_filename, lineno);
13132 current_binding_level = bl;
13133 expanding_p = (flags & SF_EXPAND) != 0;
13135 /* Even though we're inside a function body, we still don't want to
13136 call expand_expr to calculate the size of a variable-sized array.
13137 We haven't necessarily assigned RTL to all variables yet, so it's
13138 not safe to try to expand expressions involving them. */
13139 immediate_size_expand = 0;
13140 cfun->x_dont_save_pending_sizes_p = 1;
13142 /* If we're building a statement-tree, start the tree now. */
13143 if (processing_template_decl || !expanding_p)
13144 begin_stmt_tree (&DECL_SAVED_TREE (decl1));
13146 /* Let the user know we're compiling this function. */
13147 if (processing_template_decl || !building_stmt_tree ())
13148 announce_function (decl1);
13150 /* Record the decl so that the function name is defined.
13151 If we already have a decl for this name, and it is a FUNCTION_DECL,
13152 use the old decl. */
13153 if (!processing_template_decl && !(flags & SF_PRE_PARSED))
13155 /* A specialization is not used to guide overload resolution. */
13156 if ((flag_guiding_decls
13157 || !DECL_TEMPLATE_SPECIALIZATION (decl1))
13158 && ! DECL_FUNCTION_MEMBER_P (decl1))
13159 decl1 = pushdecl (decl1);
13162 /* We need to set the DECL_CONTEXT. */
13163 if (!DECL_CONTEXT (decl1) && DECL_TEMPLATE_INFO (decl1))
13164 DECL_CONTEXT (decl1) = DECL_CONTEXT (DECL_TI_TEMPLATE (decl1));
13165 /* And make sure we have enough default args. */
13166 check_default_args (decl1);
13168 DECL_MAIN_VARIANT (decl1) = decl1;
13169 fntype = TREE_TYPE (decl1);
13172 /* Reset these in case the call to pushdecl changed them. */
13173 current_function_decl = decl1;
13174 cfun->decl = decl1;
13176 /* Initialize the per-function data. */
13177 if (!DECL_PENDING_INLINE_P (decl1) && DECL_SAVED_FUNCTION_DATA (decl1))
13179 /* If we already parsed this function, and we're just expanding it
13180 now, restore saved state. */
13181 struct binding_level *bl = current_binding_level;
13182 *cp_function_chain = *DECL_SAVED_FUNCTION_DATA (decl1);
13183 current_binding_level = bl;
13185 /* This function is being processed in whole-function mode; we
13186 already did semantic analysis. */
13187 cfun->x_whole_function_mode_p = 1;
13189 /* If we decided that we didn't want to inline this function,
13190 make sure the back-end knows that. */
13191 if (!current_function_cannot_inline)
13192 current_function_cannot_inline = cp_function_chain->cannot_inline;
13194 /* We don't need the saved data anymore. */
13195 free (DECL_SAVED_FUNCTION_DATA (decl1));
13196 DECL_SAVED_FUNCTION_DATA (decl1) = NULL;
13198 else if (ctype && !doing_friend && !DECL_STATIC_FUNCTION_P (decl1))
13200 /* We know that this was set up by `grokclassfn'. We do not
13201 wait until `store_parm_decls', since evil parse errors may
13202 never get us to that point. Here we keep the consistency
13203 between `current_class_type' and `current_class_ptr'. */
13204 tree t = DECL_ARGUMENTS (decl1);
13206 my_friendly_assert (t != NULL_TREE && TREE_CODE (t) == PARM_DECL,
13208 my_friendly_assert (TREE_CODE (TREE_TYPE (t)) == POINTER_TYPE,
13211 cp_function_chain->x_current_class_ref
13212 = build_indirect_ref (t, NULL_PTR);
13213 cp_function_chain->x_current_class_ptr = t;
13215 /* Constructors and destructors need to know whether they're "in
13216 charge" of initializing virtual base classes. */
13217 if (DECL_DESTRUCTOR_P (decl1))
13218 current_in_charge_parm = TREE_CHAIN (t);
13219 else if (DECL_CONSTRUCTOR_P (decl1)
13221 && DECL_ARTIFICIAL (TREE_CHAIN (t))
13222 && (DECL_NAME (TREE_CHAIN (t))
13223 == in_charge_identifier))
13224 current_in_charge_parm = TREE_CHAIN (t);
13227 if (DECL_INTERFACE_KNOWN (decl1))
13229 tree ctx = decl_function_context (decl1);
13231 if (DECL_NOT_REALLY_EXTERN (decl1))
13232 DECL_EXTERNAL (decl1) = 0;
13234 if (ctx != NULL_TREE && DECL_THIS_INLINE (ctx)
13235 && TREE_PUBLIC (ctx))
13236 /* This is a function in a local class in an extern inline
13238 comdat_linkage (decl1);
13240 /* If this function belongs to an interface, it is public.
13241 If it belongs to someone else's interface, it is also external.
13242 This only affects inlines and template instantiations. */
13243 else if (interface_unknown == 0
13244 && (! DECL_TEMPLATE_INSTANTIATION (decl1)
13245 || flag_alt_external_templates))
13247 if (DECL_THIS_INLINE (decl1) || DECL_TEMPLATE_INSTANTIATION (decl1)
13248 || processing_template_decl)
13250 DECL_EXTERNAL (decl1)
13252 || (DECL_THIS_INLINE (decl1) && ! flag_implement_inlines
13253 && !DECL_VINDEX (decl1)));
13255 /* For WIN32 we also want to put these in linkonce sections. */
13256 maybe_make_one_only (decl1);
13259 DECL_EXTERNAL (decl1) = 0;
13260 DECL_NOT_REALLY_EXTERN (decl1) = 0;
13261 DECL_INTERFACE_KNOWN (decl1) = 1;
13263 else if (interface_unknown && interface_only
13264 && (! DECL_TEMPLATE_INSTANTIATION (decl1)
13265 || flag_alt_external_templates))
13267 /* If MULTIPLE_SYMBOL_SPACES is defined and we saw a #pragma
13268 interface, we will have interface_only set but not
13269 interface_known. In that case, we don't want to use the normal
13270 heuristics because someone will supply a #pragma implementation
13271 elsewhere, and deducing it here would produce a conflict. */
13272 comdat_linkage (decl1);
13273 DECL_EXTERNAL (decl1) = 0;
13274 DECL_INTERFACE_KNOWN (decl1) = 1;
13275 DECL_DEFER_OUTPUT (decl1) = 1;
13279 /* This is a definition, not a reference.
13280 So clear DECL_EXTERNAL. */
13281 DECL_EXTERNAL (decl1) = 0;
13283 if ((DECL_THIS_INLINE (decl1) || DECL_TEMPLATE_INSTANTIATION (decl1))
13284 && ! DECL_INTERFACE_KNOWN (decl1)
13285 /* Don't try to defer nested functions for now. */
13286 && ! decl_function_context (decl1))
13287 DECL_DEFER_OUTPUT (decl1) = 1;
13289 DECL_INTERFACE_KNOWN (decl1) = 1;
13292 if (doing_semantic_analysis_p ())
13295 current_binding_level->parm_flag = 1;
13299 cplus_decl_attributes (decl1, NULL_TREE, attrs);
13301 if (!building_stmt_tree ())
13303 GNU_xref_function (decl1, current_function_parms);
13304 make_function_rtl (decl1);
13307 /* Promote the value to int before returning it. */
13308 if (C_PROMOTING_INTEGER_TYPE_P (restype))
13309 restype = type_promotes_to (restype);
13311 /* If this fcn was already referenced via a block-scope `extern' decl
13312 (or an implicit decl), propagate certain information about the usage. */
13313 if (TREE_ADDRESSABLE (DECL_ASSEMBLER_NAME (decl1)))
13314 TREE_ADDRESSABLE (decl1) = 1;
13316 if (DECL_RESULT (decl1) == NULL_TREE)
13318 DECL_RESULT (decl1)
13319 = build_decl (RESULT_DECL, 0, TYPE_MAIN_VARIANT (restype));
13320 TREE_READONLY (DECL_RESULT (decl1)) = CP_TYPE_CONST_P (restype);
13321 TREE_THIS_VOLATILE (DECL_RESULT (decl1)) = CP_TYPE_VOLATILE_P (restype);
13326 if (DESTRUCTOR_NAME_P (DECL_ASSEMBLER_NAME (decl1))
13327 && DECL_LANGUAGE (decl1) == lang_cplusplus)
13329 dtor_label = build_decl (LABEL_DECL, NULL_TREE, NULL_TREE);
13330 DECL_CONTEXT (dtor_label) = current_function_decl;
13332 else if (DECL_CONSTRUCTOR_P (decl1))
13334 ctor_label = build_decl (LABEL_DECL, NULL_TREE, NULL_TREE);
13335 DECL_CONTEXT (ctor_label) = current_function_decl;
13341 /* Called after store_parm_decls for a function-try-block. */
13344 expand_start_early_try_stmts ()
13346 expand_start_try_stmts ();
13349 /* Store the parameter declarations into the current function declaration.
13350 This is called after parsing the parameter declarations, before
13351 digesting the body of the function.
13353 Also install to binding contour return value identifier, if any. */
13356 store_parm_decls ()
13358 register tree fndecl = current_function_decl;
13359 register tree parm;
13360 int parms_have_cleanups = 0;
13361 tree cleanups = NULL_TREE;
13363 /* This is a list of types declared among parms in a prototype. */
13364 tree parmtags = current_function_parm_tags;
13366 /* This is a chain of any other decls that came in among the parm
13367 declarations. If a parm is declared with enum {foo, bar} x;
13368 then CONST_DECLs for foo and bar are put here. */
13369 tree nonparms = NULL_TREE;
13371 /* Create a binding level for the parms. */
13372 if (!building_stmt_tree ())
13373 expand_start_bindings (2);
13375 if (current_function_parms)
13377 /* This case is when the function was defined with an ANSI prototype.
13378 The parms already have decls, so we need not do anything here
13379 except record them as in effect
13380 and complain if any redundant old-style parm decls were written. */
13382 tree specparms = current_function_parms;
13385 if (doing_semantic_analysis_p ())
13387 /* Must clear this because it might contain TYPE_DECLs declared
13389 storedecls (NULL_TREE);
13391 /* If we're doing semantic analysis, then we'll call pushdecl
13392 for each of these. We must do them in reverse order so that
13393 they end in the correct forward order. */
13394 specparms = nreverse (specparms);
13397 for (parm = specparms; parm; parm = next)
13399 next = TREE_CHAIN (parm);
13400 if (TREE_CODE (parm) == PARM_DECL)
13402 tree type = TREE_TYPE (parm);
13404 if (doing_semantic_analysis_p ())
13408 if (DECL_NAME (parm) == NULL_TREE
13409 || TREE_CODE (parm) != VOID_TYPE)
13412 cp_error ("parameter `%D' declared void", parm);
13414 cleanup = (processing_template_decl
13416 : maybe_build_cleanup (parm));
13419 cleanups = tree_cons (parm, cleanup, cleanups);
13421 else if (type != error_mark_node
13422 && TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type))
13423 parms_have_cleanups = 1;
13427 /* If we find an enum constant or a type tag,
13428 put it aside for the moment. */
13429 TREE_CHAIN (parm) = NULL_TREE;
13430 nonparms = chainon (nonparms, parm);
13434 if (doing_semantic_analysis_p ())
13436 /* Get the decls in their original chain order
13437 and record in the function. This is all and only the
13438 PARM_DECLs that were pushed into scope by the loop above. */
13439 DECL_ARGUMENTS (fndecl) = getdecls ();
13440 storetags (chainon (parmtags, gettags ()));
13444 DECL_ARGUMENTS (fndecl) = NULL_TREE;
13446 /* Now store the final chain of decls for the arguments
13447 as the decl-chain of the current lexical scope.
13448 Put the enumerators in as well, at the front so that
13449 DECL_ARGUMENTS is not modified. */
13450 if (doing_semantic_analysis_p ())
13451 storedecls (chainon (nonparms, DECL_ARGUMENTS (fndecl)));
13453 /* Initialize the RTL code for the function. */
13454 DECL_SAVED_INSNS (fndecl) = 0;
13455 if (! building_stmt_tree ())
13456 expand_function_start (fndecl, parms_have_cleanups);
13458 current_function_parms_stored = 1;
13460 /* If this function is `main', emit a call to `__main'
13461 to run global initializers, etc. */
13462 if (DECL_MAIN_P (fndecl) && !building_stmt_tree ())
13463 expand_main_function ();
13465 /* Now that we have initialized the parms, we can start their
13466 cleanups. We cannot do this before, since expand_decl_cleanup
13467 should not be called before the parm can be used. */
13470 finish_decl_cleanup (TREE_PURPOSE (cleanups),
13471 TREE_VALUE (cleanups));
13472 cleanups = TREE_CHAIN (cleanups);
13475 /* Create a binding contour which can be used to catch
13476 cleanup-generated temporaries. Also, if the return value needs or
13477 has initialization, deal with that now. */
13478 if (parms_have_cleanups)
13481 if (!building_stmt_tree ())
13482 expand_start_bindings (2);
13485 /* Do the starting of the exception specifications, if we have any. */
13486 if (flag_exceptions && !processing_template_decl
13487 && building_stmt_tree ()
13488 && TYPE_RAISES_EXCEPTIONS (TREE_TYPE (current_function_decl)))
13489 current_eh_spec_try_block = expand_start_eh_spec ();
13492 /* Bind a name and initialization to the return value of
13493 the current function. */
13496 store_return_init (decl)
13499 /* If this named return value comes in a register, put it in a
13500 pseudo-register. */
13501 if (DECL_REGISTER (decl))
13503 original_result_rtx = DECL_RTL (decl);
13504 /* Note that the mode of the old DECL_RTL may be wider than the
13505 mode of DECL_RESULT, depending on the calling conventions for
13506 the processor. For example, on the Alpha, a 32-bit integer
13507 is returned in a DImode register -- the DECL_RESULT has
13508 SImode but the DECL_RTL for the DECL_RESULT has DImode. So,
13509 here, we use the mode the back-end has already assigned for
13510 the return value. */
13511 DECL_RTL (decl) = gen_reg_rtx (GET_MODE (original_result_rtx));
13516 /* We have finished doing semantic analysis on DECL, but have not yet
13517 generated RTL for its body. Save away our current state, so that
13518 when we want to generate RTL later we know what to do. */
13521 save_function_data (decl)
13524 struct language_function *f;
13526 /* Save the language-specific per-function data so that we can
13527 get it back when we really expand this function. */
13528 my_friendly_assert (!DECL_PENDING_INLINE_P (decl),
13532 f = ((struct language_function *)
13533 xmalloc (sizeof (struct language_function)));
13534 bcopy ((char *) cp_function_chain, (char *) f,
13535 sizeof (struct language_function));
13536 DECL_SAVED_FUNCTION_DATA (decl) = f;
13538 /* Clear out the bits we don't need. */
13539 f->x_base_init_list = NULL_TREE;
13540 f->x_member_init_list = NULL_TREE;
13541 f->x_stmt_tree.x_last_stmt = NULL_TREE;
13542 f->x_stmt_tree.x_last_expr_type = NULL_TREE;
13543 f->x_result_rtx = NULL_RTX;
13544 f->x_named_label_uses = NULL;
13545 f->bindings = NULL;
13547 /* When we get back here again, we will be expanding. */
13548 f->x_expanding_p = 1;
13550 /* If we've already decided that we cannot inline this function, we
13551 must remember that fact when we actually go to expand the
13553 f->cannot_inline = current_function_cannot_inline;
13556 /* At the end of every constructor we generate to code to return
13557 `this'. Do that now. */
13560 finish_constructor_body ()
13562 /* Any return from a constructor will end up here. */
13563 add_tree (build_min_nt (LABEL_STMT, ctor_label));
13565 /* Clear CTOR_LABEL so that finish_return_stmt knows to really
13566 generate the return, rather than a goto to CTOR_LABEL. */
13567 ctor_label = NULL_TREE;
13568 /* In check_return_expr we translate an empty return from a
13569 constructor to a return of `this'. */
13570 finish_return_stmt (NULL_TREE);
13571 /* Mark the end of the constructor. */
13572 add_tree (build_min_nt (CTOR_STMT));
13575 /* At the end of every destructor we generate code to restore virtual
13576 function tables to the values desired by base classes and to call
13577 to base class destructors. Do that now. */
13580 finish_destructor_body ()
13582 tree compound_stmt;
13587 /* Create a block to contain all the extra code. */
13588 compound_stmt = begin_compound_stmt (/*has_no_scope=*/0);
13590 /* Any return from a destructor will end up here. */
13591 add_tree (build_min_nt (LABEL_STMT, dtor_label));
13593 /* Generate the code to call destructor on base class. If this
13594 destructor belongs to a class with virtual functions, then set
13595 the virtual function table pointer to represent the type of our
13598 /* This side-effect makes call to `build_delete' generate the code
13599 we have to have at the end of this destructor. `build_delete'
13600 will set the flag again. */
13601 TYPE_HAS_DESTRUCTOR (current_class_type) = 0;
13603 /* These are two cases where we cannot delegate deletion. */
13604 if (TYPE_USES_VIRTUAL_BASECLASSES (current_class_type)
13605 || TYPE_GETS_REG_DELETE (current_class_type))
13606 in_charge = integer_zero_node;
13608 in_charge = current_in_charge_parm;
13610 exprstmt = build_delete (current_class_type,
13613 LOOKUP_NONVIRTUAL|LOOKUP_DESTRUCTOR|LOOKUP_NORMAL,
13616 if (exprstmt != error_mark_node
13617 && (TREE_CODE (exprstmt) != NOP_EXPR
13618 || TREE_OPERAND (exprstmt, 0) != integer_zero_node
13619 || TYPE_USES_VIRTUAL_BASECLASSES (current_class_type)))
13621 if (exprstmt != void_zero_node)
13622 /* Don't call `expand_expr_stmt' if we're not going to do
13623 anything, since -Wall will give a diagnostic. */
13624 finish_expr_stmt (exprstmt);
13626 /* Run destructors for all virtual baseclasses. */
13627 if (TYPE_USES_VIRTUAL_BASECLASSES (current_class_type))
13629 tree vbases = nreverse (copy_list (CLASSTYPE_VBASECLASSES (current_class_type)));
13630 tree if_stmt = begin_if_stmt ();
13631 finish_if_stmt_cond (build (BIT_AND_EXPR, integer_type_node,
13632 current_in_charge_parm,
13638 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (BINFO_TYPE (vbases)))
13640 tree vb = get_vbase
13641 (BINFO_TYPE (vbases),
13642 TYPE_BINFO (current_class_type));
13644 (build_scoped_method_call
13645 (current_class_ref, vb, dtor_identifier,
13646 build_tree_list (NULL_TREE, integer_zero_node)));
13648 vbases = TREE_CHAIN (vbases);
13651 finish_then_clause (if_stmt);
13656 virtual_size = c_sizeof (current_class_type);
13658 /* At the end, call delete if that's what's requested. */
13660 /* FDIS sez: At the point of definition of a virtual destructor
13661 (including an implicit definition), non-placement operator delete
13662 shall be looked up in the scope of the destructor's class and if
13663 found shall be accessible and unambiguous.
13665 This is somewhat unclear, but I take it to mean that if the class
13666 only defines placement deletes we don't do anything here. So we
13667 pass LOOKUP_SPECULATIVELY; delete_sanity will complain for us if
13668 they ever try to delete one of these. */
13669 if (TYPE_GETS_REG_DELETE (current_class_type)
13670 || TYPE_USES_VIRTUAL_BASECLASSES (current_class_type))
13674 exprstmt = build_op_delete_call
13675 (DELETE_EXPR, current_class_ptr, virtual_size,
13676 LOOKUP_NORMAL | LOOKUP_SPECULATIVELY, NULL_TREE);
13678 if_stmt = begin_if_stmt ();
13679 finish_if_stmt_cond (build (BIT_AND_EXPR, integer_type_node,
13680 current_in_charge_parm,
13683 finish_expr_stmt (exprstmt);
13684 finish_then_clause (if_stmt);
13688 /* Close the block we started above. */
13689 finish_compound_stmt (/*has_no_scope=*/0, compound_stmt);
13692 /* Finish up a function declaration and compile that function
13693 all the way to assembler language output. The free the storage
13694 for the function definition.
13696 This is called after parsing the body of the function definition.
13697 LINENO is the current line number.
13699 FLAGS is a bitwise or of the following values:
13701 An extra call to poplevel (and expand_end_bindings) must be
13702 made to take care of the binding contour for the base
13703 initializers. This is only relevant for constructors.
13705 We just finished processing the body of an in-class inline
13706 function definition. (This processing will have taken place
13707 after the class definition is complete.) */
13710 finish_function (lineno, flags)
13714 register tree fndecl = current_function_decl;
13715 tree fntype, ctype = NULL_TREE;
13716 /* Label to use if this function is supposed to return a value. */
13717 tree no_return_label = NULL_TREE;
13718 int call_poplevel = (flags & 1) != 0;
13719 int inclass_inline = (flags & 2) != 0;
13723 /* When we get some parse errors, we can end up without a
13724 current_function_decl, so cope. */
13725 if (fndecl == NULL_TREE)
13726 return error_mark_node;
13728 nested = function_depth > 1;
13729 fntype = TREE_TYPE (fndecl);
13731 /* TREE_READONLY (fndecl) = 1;
13732 This caused &foo to be of type ptr-to-const-function
13733 which then got a warning when stored in a ptr-to-function variable. */
13735 /* This happens on strange parse errors. */
13736 if (! current_function_parms_stored)
13739 store_parm_decls ();
13742 if (building_stmt_tree ())
13744 if (DECL_CONSTRUCTOR_P (fndecl))
13746 finish_constructor_body ();
13750 else if (DECL_DESTRUCTOR_P (fndecl) && !processing_template_decl)
13751 finish_destructor_body ();
13752 else if (DECL_MAIN_P (fndecl))
13754 /* Make it so that `main' always returns 0 by default. */
13756 finish_return_stmt (integer_one_node);
13758 finish_return_stmt (integer_zero_node);
13762 /* Finish dealing with exception specifiers. */
13763 if (flag_exceptions && !processing_template_decl
13764 && TYPE_RAISES_EXCEPTIONS (TREE_TYPE (current_function_decl)))
13765 expand_end_eh_spec (TYPE_RAISES_EXCEPTIONS
13766 (TREE_TYPE (current_function_decl)),
13767 current_eh_spec_try_block);
13772 if (write_symbols != NO_DEBUG /*&& TREE_CODE (fntype) != METHOD_TYPE*/)
13774 /* Keep this code around in case we later want to control debug info
13775 based on whether a type is "used". (jason 1999-11-11) */
13777 tree ttype = target_type (fntype);
13780 if (IS_AGGR_TYPE (ttype))
13781 /* Let debugger know it should output info for this type. */
13782 note_debug_info_needed (ttype);
13784 for (parmdecl = DECL_ARGUMENTS (fndecl); parmdecl; parmdecl = TREE_CHAIN (parmdecl))
13786 ttype = target_type (TREE_TYPE (parmdecl));
13787 if (IS_AGGR_TYPE (ttype))
13788 /* Let debugger know it should output info for this type. */
13789 note_debug_info_needed (ttype);
13794 /* Clean house because we will need to reorder insns here. */
13795 do_pending_stack_adjust ();
13799 else if (DECL_CONSTRUCTOR_P (fndecl))
13804 else if (return_label != NULL_RTX
13805 && flag_this_is_variable <= 0
13806 && current_function_return_value == NULL_TREE
13807 && ! DECL_NAME (DECL_RESULT (current_function_decl)))
13808 no_return_label = build_decl (LABEL_DECL, NULL_TREE, NULL_TREE);
13810 if (flag_exceptions)
13811 expand_exception_blocks ();
13813 /* If this function is supposed to return a value, ensure that
13814 we do not fall into the cleanups by mistake. The end of our
13815 function will look like this:
13817 user code (may have return stmt somewhere)
13818 goto no_return_label
13823 NOTE_INSN_FUNCTION_END
13827 If the user omits a return stmt in the USER CODE section, we
13828 will have a control path which reaches NOTE_INSN_FUNCTION_END.
13829 Otherwise, we won't. */
13830 if (no_return_label)
13832 DECL_CONTEXT (no_return_label) = fndecl;
13833 DECL_INITIAL (no_return_label) = error_mark_node;
13834 DECL_SOURCE_FILE (no_return_label) = input_filename;
13835 DECL_SOURCE_LINE (no_return_label) = lineno;
13836 expand_goto (no_return_label);
13841 /* Remove the binding contour which is used
13842 to catch cleanup-generated temporaries. */
13843 expand_end_bindings (0, 0, 0);
13844 poplevel (0, 0, 0);
13846 /* Emit label at beginning of cleanup code for parameters. */
13847 emit_label (cleanup_label);
13850 /* Get return value into register if that's where it's supposed
13852 if (original_result_rtx)
13853 fixup_result_decl (DECL_RESULT (fndecl), original_result_rtx);
13855 /* Finish building code that will trigger warnings if users forget
13856 to make their functions return values. */
13857 if (no_return_label || cleanup_label)
13858 emit_jump (return_label);
13859 if (no_return_label)
13861 /* We don't need to call `expand_*_return' here because we
13862 don't need any cleanups here--this path of code is only
13863 for error checking purposes. */
13864 expand_label (no_return_label);
13867 /* We hard-wired immediate_size_expand to zero in
13868 start_function. Expand_function_end will decrement this
13869 variable. So, we set the variable to one here, so that after
13870 the decrement it will remain zero. */
13871 immediate_size_expand = 1;
13873 /* Generate rtl for function exit. */
13874 expand_function_end (input_filename, lineno, 1);
13877 /* We have to save this value here in case
13878 maybe_end_member_template_processing decides to pop all the
13879 template parameters. */
13880 expand_p = !building_stmt_tree ();
13882 /* If we're saving up tree structure, tie off the function now. */
13884 finish_stmt_tree (&DECL_SAVED_TREE (fndecl));
13886 /* This must come after expand_function_end because cleanups might
13887 have declarations (from inline functions) that need to go into
13888 this function's blocks. */
13889 if (doing_semantic_analysis_p ())
13891 if (current_binding_level->parm_flag != 1)
13892 my_friendly_abort (122);
13893 poplevel (1, 0, 1);
13896 /* Remember that we were in class scope. */
13897 if (current_class_name)
13898 ctype = current_class_type;
13900 /* Must mark the RESULT_DECL as being in this function. */
13901 DECL_CONTEXT (DECL_RESULT (fndecl)) = fndecl;
13903 /* Set the BLOCK_SUPERCONTEXT of the outermost function scope to point
13904 to the FUNCTION_DECL node itself. */
13905 BLOCK_SUPERCONTEXT (DECL_INITIAL (fndecl)) = fndecl;
13907 /* Save away current state, if appropriate. */
13908 if (!expanding_p && !processing_template_decl)
13909 save_function_data (fndecl);
13911 /* If this function calls `setjmp' it cannot be inlined. When
13912 `longjmp' is called it is not guaranteed to restore the value of
13913 local variables that have been modified since the call to
13914 `setjmp'. So, if were to inline this function into some caller
13915 `c', then when we `longjmp', we might not restore all variables
13916 in `c'. (It might seem, at first blush, that there's no way for
13917 this function to modify local variables in `c', but their
13918 addresses may have been stored somewhere accessible to this
13920 if (!expanding_p && !processing_template_decl && calls_setjmp_p (fndecl))
13921 DECL_UNINLINABLE (fndecl) = 1;
13928 /* So we can tell if jump_optimize sets it to 1. */
13931 /* Before we call rest_of_compilation (which will pop the
13932 CURRENT_FUNCTION), we must save these values. */
13933 returns_null = current_function_returns_null;
13934 returns_value = current_function_returns_value;
13936 /* If this is a nested function (like a template instantiation
13937 that we're compiling in the midst of compiling something
13938 else), push a new GC context. That will keep local variables
13939 on the stack from being collected while we're doing the
13940 compilation of this function. */
13941 if (function_depth > 1)
13942 ggc_push_context ();
13944 /* Run the optimizers and output the assembler code for this
13946 if (DECL_ARTIFICIAL (fndecl))
13948 /* Do we really *want* to inline this synthesized method? */
13950 int save_fif = flag_inline_functions;
13951 flag_inline_functions = 1;
13953 /* Turn off DECL_INLINE for the moment so function_cannot_inline_p
13954 will check our size. */
13955 DECL_INLINE (fndecl) = 0;
13957 rest_of_compilation (fndecl);
13958 flag_inline_functions = save_fif;
13961 rest_of_compilation (fndecl);
13963 /* Undo the call to ggc_push_context above. */
13964 if (function_depth > 1)
13965 ggc_pop_context ();
13967 if (DECL_SAVED_INSNS (fndecl) && ! TREE_ASM_WRITTEN (fndecl))
13969 /* Set DECL_EXTERNAL so that assemble_external will be called as
13970 necessary. We'll clear it again in finish_file. */
13971 if (! DECL_EXTERNAL (fndecl))
13972 DECL_NOT_REALLY_EXTERN (fndecl) = 1;
13973 DECL_EXTERNAL (fndecl) = 1;
13974 mark_inline_for_output (fndecl);
13978 /* Keep this code around in case we later want to control debug info
13979 based on whether a type is "used". (jason 1999-11-11) */
13981 if (ctype && TREE_ASM_WRITTEN (fndecl))
13982 note_debug_info_needed (ctype);
13985 returns_null |= can_reach_end;
13987 /* Since we don't normally go through c_expand_return for constructors,
13988 this normally gets the wrong value.
13989 Also, named return values have their return codes emitted after
13990 NOTE_INSN_FUNCTION_END, confusing jump.c. */
13991 if (DECL_CONSTRUCTOR_P (fndecl)
13992 || DECL_NAME (DECL_RESULT (fndecl)) != NULL_TREE)
13995 if (TREE_THIS_VOLATILE (fndecl) && returns_null)
13996 cp_warning ("`noreturn' function `%D' does return", fndecl);
13997 else if ((warn_return_type || pedantic)
13999 && TREE_CODE (TREE_TYPE (fntype)) != VOID_TYPE)
14001 /* If this function returns non-void and control can drop through,
14003 cp_warning ("control reaches end of non-void function `%D'", fndecl);
14005 /* With just -W, complain only if function returns both with
14006 and without a value. */
14007 else if (extra_warnings && returns_value && returns_null)
14008 warning ("this function may return with or without a value");
14012 /* Clear out memory we no longer need. */
14013 free_after_parsing (cfun);
14014 /* Since we never call rest_of_compilation, we never clear
14015 CFUN. Do so explicitly. */
14016 free_after_compilation (cfun);
14020 /* If this is a in-class inline definition, we may have to pop the
14021 bindings for the template parameters that we added in
14022 maybe_begin_member_template_processing when start_function was
14024 if (inclass_inline)
14025 maybe_end_member_template_processing ();
14027 /* Leave the scope of the class. */
14029 pop_nested_class ();
14033 if (!DECL_SAVED_INSNS (fndecl) && !DECL_SAVED_FUNCTION_DATA (fndecl)
14034 && !(flag_inline_trees && DECL_INLINE (fndecl)))
14038 /* Stop pointing to the local nodes about to be freed. */
14039 /* But DECL_INITIAL must remain nonzero so we know this
14040 was an actual function definition. */
14041 DECL_INITIAL (fndecl) = error_mark_node;
14042 for (t = DECL_ARGUMENTS (fndecl); t; t = TREE_CHAIN (t))
14043 DECL_RTL (t) = DECL_INCOMING_RTL (t) = NULL_RTX;
14046 if (DECL_STATIC_CONSTRUCTOR (fndecl))
14047 static_ctors = tree_cons (NULL_TREE, fndecl, static_ctors);
14048 if (DECL_STATIC_DESTRUCTOR (fndecl))
14049 static_dtors = tree_cons (NULL_TREE, fndecl, static_dtors);
14054 /* Let the error reporting routines know that we're outside a
14055 function. For a nested function, this value is used in
14056 pop_cp_function_context and then reset via pop_function_context. */
14057 current_function_decl = NULL_TREE;
14058 /* We don't really care about obstacks, but the middle-end
14059 sometimes cares on what obstck things are located. */
14060 permanent_allocation (1);
14066 /* Create the FUNCTION_DECL for a function definition.
14067 DECLSPECS and DECLARATOR are the parts of the declaration;
14068 they describe the return type and the name of the function,
14069 but twisted together in a fashion that parallels the syntax of C.
14071 This function creates a binding context for the function body
14072 as well as setting up the FUNCTION_DECL in current_function_decl.
14074 Returns a FUNCTION_DECL on success.
14076 If the DECLARATOR is not suitable for a function (it defines a datum
14077 instead), we return 0, which tells yyparse to report a parse error.
14079 May return void_type_node indicating that this method is actually
14080 a friend. See grokfield for more details.
14082 Came here with a `.pushlevel' .
14084 DO NOT MAKE ANY CHANGES TO THIS CODE WITHOUT MAKING CORRESPONDING
14085 CHANGES TO CODE IN `grokfield'. */
14088 start_method (declspecs, declarator, attrlist)
14089 tree declarator, declspecs, attrlist;
14091 tree fndecl = grokdeclarator (declarator, declspecs, MEMFUNCDEF, 0,
14094 /* Something too ugly to handle. */
14095 if (fndecl == NULL_TREE)
14098 /* Pass friends other than inline friend functions back. */
14099 if (fndecl == void_type_node)
14102 if (TREE_CODE (fndecl) != FUNCTION_DECL)
14103 /* Not a function, tell parser to report parse error. */
14106 if (DECL_IN_AGGR_P (fndecl))
14108 if (IDENTIFIER_ERROR_LOCUS (DECL_ASSEMBLER_NAME (fndecl)) != current_class_type)
14110 if (DECL_CONTEXT (fndecl)
14111 && TREE_CODE( DECL_CONTEXT (fndecl)) != NAMESPACE_DECL)
14112 cp_error ("`%D' is already defined in class %s", fndecl,
14113 TYPE_NAME_STRING (DECL_CONTEXT (fndecl)));
14115 return void_type_node;
14118 check_template_shadow (fndecl);
14120 DECL_THIS_INLINE (fndecl) = 1;
14122 if (flag_default_inline)
14123 DECL_INLINE (fndecl) = 1;
14125 /* We process method specializations in finish_struct_1. */
14126 if (processing_template_decl && !DECL_TEMPLATE_SPECIALIZATION (fndecl))
14127 fndecl = push_template_decl (fndecl);
14129 /* We read in the parameters on the maybepermanent_obstack,
14130 but we won't be getting back to them until after we
14131 may have clobbered them. So the call to preserve_data
14132 will keep them safe. */
14135 if (! DECL_FRIEND_P (fndecl))
14137 if (TREE_CHAIN (fndecl))
14139 fndecl = copy_node (fndecl);
14140 TREE_CHAIN (fndecl) = NULL_TREE;
14143 if (DECL_CONSTRUCTOR_P (fndecl))
14145 if (! grok_ctor_properties (current_class_type, fndecl))
14146 return void_type_node;
14148 else if (IDENTIFIER_OPNAME_P (DECL_NAME (fndecl)))
14149 grok_op_properties (fndecl, DECL_VIRTUAL_P (fndecl), 0);
14152 cp_finish_decl (fndecl, NULL_TREE, NULL_TREE, 0);
14154 /* Make a place for the parms */
14156 current_binding_level->parm_flag = 1;
14158 DECL_IN_AGGR_P (fndecl) = 1;
14162 /* Go through the motions of finishing a function definition.
14163 We don't compile this method until after the whole class has
14166 FINISH_METHOD must return something that looks as though it
14167 came from GROKFIELD (since we are defining a method, after all).
14169 This is called after parsing the body of the function definition.
14170 STMTS is the chain of statements that makes up the function body.
14172 DECL is the ..._DECL that `start_method' provided. */
14175 finish_method (decl)
14178 register tree fndecl = decl;
14181 register tree link;
14183 if (decl == void_type_node)
14186 old_initial = DECL_INITIAL (fndecl);
14188 /* Undo the level for the parms (from start_method).
14189 This is like poplevel, but it causes nothing to be
14190 saved. Saving information here confuses symbol-table
14191 output routines. Besides, this information will
14192 be correctly output when this method is actually
14195 /* Clear out the meanings of the local variables of this level;
14196 also record in each decl which block it belongs to. */
14198 for (link = current_binding_level->names; link; link = TREE_CHAIN (link))
14200 if (DECL_NAME (link) != NULL_TREE)
14201 pop_binding (DECL_NAME (link), link);
14202 my_friendly_assert (TREE_CODE (link) != FUNCTION_DECL, 163);
14203 DECL_CONTEXT (link) = NULL_TREE;
14206 GNU_xref_end_scope ((HOST_WIDE_INT) current_binding_level,
14207 (HOST_WIDE_INT) current_binding_level->level_chain,
14208 current_binding_level->parm_flag,
14209 current_binding_level->keep);
14211 poplevel (0, 0, 0);
14213 DECL_INITIAL (fndecl) = old_initial;
14215 /* We used to check if the context of FNDECL was different from
14216 current_class_type as another way to get inside here. This didn't work
14217 for String.cc in libg++. */
14218 if (DECL_FRIEND_P (fndecl))
14220 CLASSTYPE_INLINE_FRIENDS (current_class_type)
14221 = tree_cons (NULL_TREE, fndecl, CLASSTYPE_INLINE_FRIENDS (current_class_type));
14222 decl = void_type_node;
14228 /* Called when a new struct TYPE is defined.
14229 If this structure or union completes the type of any previous
14230 variable declaration, lay it out and output its rtl. */
14233 hack_incomplete_structures (type)
14237 struct binding_level *level;
14239 if (!type) /* Don't do this for class templates. */
14242 if (namespace_bindings_p ())
14245 list = &namespace_scope_incomplete;
14249 level = innermost_nonclass_level ();
14250 list = &level->incomplete;
14257 tree decl = TREE_VALUE (*list);
14258 if ((decl && TREE_TYPE (decl) == type)
14259 || (TREE_TYPE (decl)
14260 && TREE_CODE (TREE_TYPE (decl)) == ARRAY_TYPE
14261 && TREE_TYPE (TREE_TYPE (decl)) == type))
14263 int toplevel = toplevel_bindings_p ();
14264 if (TREE_CODE (TREE_TYPE (decl)) == ARRAY_TYPE
14265 && TREE_TYPE (TREE_TYPE (decl)) == type)
14266 layout_type (TREE_TYPE (decl));
14267 layout_decl (decl, 0);
14268 rest_of_decl_compilation (decl, NULL_PTR, toplevel, 0);
14272 expand_decl (decl);
14273 cleanup = maybe_build_cleanup (decl);
14274 expand_decl_init (decl);
14275 if (! expand_decl_cleanup (decl, cleanup))
14276 cp_error ("parser lost in parsing declaration of `%D'",
14279 *list = TREE_CHAIN (*list);
14282 list = &TREE_CHAIN (*list);
14285 /* Keep looking through artificial binding levels generated
14286 for local variables. */
14287 if (level && level->keep == 2)
14289 level = level->level_chain;
14290 list = &level->incomplete;
14297 /* If DECL is of a type which needs a cleanup, build that cleanup here.
14298 See build_delete for information about AUTO_DELETE.
14300 Don't build these on the momentary obstack; they must live
14301 the life of the binding contour. */
14304 maybe_build_cleanup_1 (decl, auto_delete)
14305 tree decl, auto_delete;
14307 tree type = TREE_TYPE (decl);
14308 if (type != error_mark_node && TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type))
14310 int flags = LOOKUP_NORMAL|LOOKUP_DESTRUCTOR;
14313 if (TREE_CODE (type) == ARRAY_TYPE)
14317 mark_addressable (decl);
14318 rval = build_unary_op (ADDR_EXPR, decl, 0);
14321 /* Optimize for space over speed here. */
14322 if (! TYPE_USES_VIRTUAL_BASECLASSES (type)
14323 || flag_expensive_optimizations)
14324 flags |= LOOKUP_NONVIRTUAL;
14326 rval = build_delete (TREE_TYPE (rval), rval, auto_delete, flags, 0);
14328 if (TYPE_USES_VIRTUAL_BASECLASSES (type)
14329 && ! TYPE_HAS_DESTRUCTOR (type))
14330 rval = build_compound_expr (tree_cons (NULL_TREE, rval,
14331 build_tree_list (NULL_TREE, build_vbase_delete (type, decl))));
14338 /* If DECL is of a type which needs a cleanup, build that cleanup
14339 here. The cleanup does free the storage with a call to delete. */
14342 maybe_build_cleanup_and_delete (decl)
14345 return maybe_build_cleanup_1 (decl, integer_three_node);
14348 /* If DECL is of a type which needs a cleanup, build that cleanup
14349 here. The cleanup does not free the storage with a call a delete. */
14352 maybe_build_cleanup (decl)
14355 return maybe_build_cleanup_1 (decl, integer_two_node);
14358 /* Expand a C++ expression at the statement level.
14359 This is needed to ferret out nodes which have UNKNOWN_TYPE.
14360 The C++ type checker should get all of these out when
14361 expressions are combined with other, type-providing, expressions,
14362 leaving only orphan expressions, such as:
14364 &class::bar; / / takes its address, but does nothing with it. */
14367 cplus_expand_expr_stmt (exp)
14370 if (stmts_are_full_exprs_p)
14371 exp = convert_to_void (exp, "statement");
14374 /* We should do this eventually, but right now this causes regex.o from
14375 libg++ to miscompile, and tString to core dump. */
14376 exp = build1 (CLEANUP_POINT_EXPR, TREE_TYPE (exp), exp);
14379 /* If we don't do this, we end up down inside expand_expr
14380 trying to do TYPE_MODE on the ERROR_MARK, and really
14381 go outside the bounds of the type. */
14382 if (exp != error_mark_node)
14383 expand_expr_stmt (exp);
14386 /* When a stmt has been parsed, this function is called. */
14391 /* Always assume this statement was not an expression statement. If
14392 it actually was an expression statement, its our callers
14393 responsibility to fix this up. */
14394 last_expr_type = NULL_TREE;
14397 /* Change a static member function definition into a FUNCTION_TYPE, instead
14398 of the METHOD_TYPE that we create when it's originally parsed.
14400 WARNING: DO NOT pass &TREE_TYPE (decl) to FN or &TYPE_ARG_TYPES
14401 (TREE_TYPE (decl)) to ARGTYPES, as doing so will corrupt the types of
14402 other decls. Either pass the addresses of local variables or NULL. */
14405 revert_static_member_fn (decl, fn, argtypes)
14406 tree *decl, *fn, *argtypes;
14409 tree function = fn ? *fn : TREE_TYPE (*decl);
14410 tree args = argtypes ? *argtypes : TYPE_ARG_TYPES (function);
14412 if (CP_TYPE_QUALS (TREE_TYPE (TREE_VALUE (args)))
14413 != TYPE_UNQUALIFIED)
14414 cp_error ("static member function `%#D' declared with type qualifiers",
14417 args = TREE_CHAIN (args);
14418 tmp = build_function_type (TREE_TYPE (function), args);
14419 tmp = build_qualified_type (tmp, CP_TYPE_QUALS (function));
14420 tmp = build_exception_variant (tmp,
14421 TYPE_RAISES_EXCEPTIONS (function));
14422 TREE_TYPE (*decl) = tmp;
14423 if (DECL_ARGUMENTS (*decl))
14424 DECL_ARGUMENTS (*decl) = TREE_CHAIN (DECL_ARGUMENTS (*decl));
14425 DECL_STATIC_FUNCTION_P (*decl) = 1;
14432 /* Initialize the variables used during compilation of a C++
14436 push_cp_function_context (f)
14437 struct function *f;
14439 struct language_function *p
14440 = ((struct language_function *)
14441 xcalloc (1, sizeof (struct language_function)));
14444 /* It takes an explicit call to expand_body to generate RTL for a
14448 /* Whenever we start a new function, we destroy temporaries in the
14450 stmts_are_full_exprs_p = 1;
14453 /* Free the language-specific parts of F, now that we've finished
14454 compiling the function. */
14457 pop_cp_function_context (f)
14458 struct function *f;
14461 free (f->language);
14465 /* Mark P for GC. */
14468 mark_lang_function (p)
14469 struct language_function *p;
14474 ggc_mark_tree (p->x_named_labels);
14475 ggc_mark_tree (p->x_ctor_label);
14476 ggc_mark_tree (p->x_dtor_label);
14477 ggc_mark_tree (p->x_base_init_list);
14478 ggc_mark_tree (p->x_member_init_list);
14479 ggc_mark_tree (p->x_current_class_ptr);
14480 ggc_mark_tree (p->x_current_class_ref);
14481 ggc_mark_tree (p->x_eh_spec_try_block);
14482 ggc_mark_tree (p->x_scope_stmt_stack);
14484 ggc_mark_rtx (p->x_result_rtx);
14486 mark_stmt_tree (&p->x_stmt_tree);
14487 mark_binding_level (&p->bindings);
14490 /* Mark the language-specific data in F for GC. */
14493 mark_cp_function_context (f)
14494 struct function *f;
14496 mark_lang_function (f->language);
14502 return function_depth != 0;
14507 lang_mark_false_label_stack (l)
14508 struct label_node *l;
14510 /* C++ doesn't use false_label_stack. It better be NULL. */
14511 my_friendly_assert (l == NULL, 19990904);
14518 enum tree_code code = TREE_CODE (t);
14519 if (code == IDENTIFIER_NODE)
14521 struct lang_identifier *li = (struct lang_identifier *) t;
14522 struct lang_id2 *li2 = li->x;
14523 ggc_mark_tree (li->namespace_bindings);
14524 ggc_mark_tree (li->bindings);
14525 ggc_mark_tree (li->class_value);
14526 ggc_mark_tree (li->class_template_info);
14530 ggc_mark_tree (li2->label_value);
14531 ggc_mark_tree (li2->implicit_decl);
14532 ggc_mark_tree (li2->error_locus);
14535 else if (code == CPLUS_BINDING)
14537 if (BINDING_HAS_LEVEL_P (t))
14538 mark_binding_level (&BINDING_LEVEL (t));
14540 ggc_mark_tree (BINDING_SCOPE (t));
14541 ggc_mark_tree (BINDING_VALUE (t));
14543 else if (code == OVERLOAD)
14544 ggc_mark_tree (OVL_FUNCTION (t));
14545 else if (code == TEMPLATE_PARM_INDEX)
14546 ggc_mark_tree (TEMPLATE_PARM_DECL (t));
14547 else if (TREE_CODE_CLASS (code) == 'd')
14549 struct lang_decl *ld = DECL_LANG_SPECIFIC (t);
14554 if (!DECL_GLOBAL_CTOR_P (t) && !DECL_GLOBAL_DTOR_P (t))
14555 ggc_mark_tree (ld->decl_flags.u2.access);
14556 ggc_mark_tree (ld->decl_flags.context);
14557 if (TREE_CODE (t) != NAMESPACE_DECL)
14558 ggc_mark_tree (ld->decl_flags.u.template_info);
14560 mark_binding_level (&NAMESPACE_LEVEL (t));
14561 if (CAN_HAVE_FULL_LANG_DECL_P (t))
14563 ggc_mark_tree (ld->main_decl_variant);
14564 ggc_mark_tree (ld->befriending_classes);
14565 ggc_mark_tree (ld->saved_tree);
14566 if (TREE_CODE (t) == TYPE_DECL)
14567 ggc_mark_tree (ld->u.sorted_fields);
14568 else if (TREE_CODE (t) == FUNCTION_DECL
14569 && !DECL_PENDING_INLINE_P (t))
14570 mark_lang_function (DECL_SAVED_FUNCTION_DATA (t));
14574 else if (TREE_CODE_CLASS (code) == 't')
14576 struct lang_type *lt = TYPE_LANG_SPECIFIC (t);
14578 if (lt && !(TREE_CODE (t) == POINTER_TYPE
14579 && TREE_CODE (TREE_TYPE (t)) == METHOD_TYPE))
14582 ggc_mark_tree (lt->vfields);
14583 ggc_mark_tree (lt->vbases);
14584 ggc_mark_tree (lt->tags);
14585 ggc_mark_tree (lt->search_slot);
14586 ggc_mark_tree (lt->size);
14587 ggc_mark_tree (lt->pure_virtuals);
14588 ggc_mark_tree (lt->friend_classes);
14589 ggc_mark_tree (lt->rtti);
14590 ggc_mark_tree (lt->methods);
14591 ggc_mark_tree (lt->template_info);
14592 ggc_mark_tree (lt->befriending_classes);
14595 /* In the case of pointer-to-member function types, the
14596 TYPE_LANG_SPECIFIC is really just a tree. */
14597 ggc_mark_tree ((tree) lt);