1 /* Process declarations and variables for C compiler.
2 Copyright (C) 1988, 92-98, 1999 Free Software Foundation, Inc.
3 Contributed by Michael Tiemann (tiemann@cygnus.com)
5 This file is part of GNU CC.
7 GNU CC is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2, or (at your option)
12 GNU CC is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with GNU CC; see the file COPYING. If not, write to
19 the Free Software Foundation, 59 Temple Place - Suite 330,
20 Boston, MA 02111-1307, USA. */
23 /* Process declarations and symbol lookup for C front end.
24 Also constructs types; the standard scalar types at initialization,
25 and structure, union, array and enum types when they are declared. */
27 /* ??? not all decl nodes are given the most useful possible
28 line numbers. For example, the CONST_DECLs for enum values. */
48 #define obstack_chunk_alloc xmalloc
49 #define obstack_chunk_free free
51 extern struct obstack permanent_obstack
;
52 extern struct obstack
* saveable_obstack
;
54 extern int current_class_depth
;
56 extern tree static_ctors
, static_dtors
;
58 extern tree global_namespace
;
60 extern int (*valid_lang_attribute
) PROTO ((tree
, tree
, tree
, tree
));
62 /* Use garbage collection. */
66 #ifndef WCHAR_UNSIGNED
67 #define WCHAR_UNSIGNED 0
70 #ifndef CHAR_TYPE_SIZE
71 #define CHAR_TYPE_SIZE BITS_PER_UNIT
74 #ifndef BOOL_TYPE_SIZE
75 #ifdef SLOW_BYTE_ACCESS
76 #define BOOL_TYPE_SIZE ((SLOW_BYTE_ACCESS) ? (POINTER_SIZE) : (CHAR_TYPE_SIZE))
78 #define BOOL_TYPE_SIZE CHAR_TYPE_SIZE
82 /* We let tm.h override the types used here, to handle trivial differences
83 such as the choice of unsigned int or long unsigned int for size_t.
84 When machines start needing nontrivial differences in the size type,
85 it would be best to do something here to figure out automatically
86 from other information what type to use. */
89 #define SIZE_TYPE "long unsigned int"
93 #define PTRDIFF_TYPE "long int"
97 #define WCHAR_TYPE "int"
100 static tree grokparms
PROTO((tree
, int));
101 static const char *redeclaration_error_message
PROTO((tree
, tree
));
103 static void push_binding_level
PROTO((struct binding_level
*, int,
105 static void pop_binding_level
PROTO((void));
106 static void suspend_binding_level
PROTO((void));
107 static void resume_binding_level
PROTO((struct binding_level
*));
108 static struct binding_level
*make_binding_level
PROTO((void));
109 static void declare_namespace_level
PROTO((void));
110 static void signal_catch
PROTO((int)) ATTRIBUTE_NORETURN
;
111 static void storedecls
PROTO((tree
));
112 static void require_complete_types_for_parms
PROTO((tree
));
113 static void push_overloaded_decl_1
PROTO((tree
));
114 static int ambi_op_p
PROTO((tree
));
115 static int unary_op_p
PROTO((tree
));
116 static tree store_bindings
PROTO((tree
, tree
));
117 static tree lookup_tag_reverse
PROTO((tree
, tree
));
118 static tree obscure_complex_init
PROTO((tree
, tree
));
119 static tree maybe_build_cleanup_1
PROTO((tree
, tree
));
120 static tree lookup_name_real
PROTO((tree
, int, int, int));
121 static void warn_extern_redeclared_static
PROTO((tree
, tree
));
122 static void grok_reference_init
PROTO((tree
, tree
, tree
));
123 static tree grokfndecl
PROTO((tree
, tree
, tree
, tree
, int,
124 enum overload_flags
, tree
,
125 tree
, int, int, int, int, int, int, tree
));
126 static tree grokvardecl
PROTO((tree
, tree
, RID_BIT_TYPE
*, int, int, tree
));
127 static tree lookup_tag
PROTO((enum tree_code
, tree
,
128 struct binding_level
*, int));
129 static void set_identifier_type_value_with_scope
130 PROTO((tree
, tree
, struct binding_level
*));
131 static void record_builtin_type
PROTO((enum rid
, const char *, tree
));
132 static void record_unknown_type
PROTO((tree
, const char *));
133 static int member_function_or_else
PROTO((tree
, tree
, const char *));
134 static void bad_specifiers
PROTO((tree
, const char *, int, int, int, int,
136 static void lang_print_error_function
PROTO((const char *));
137 static tree maybe_process_template_type_declaration
PROTO((tree
, int, struct binding_level
*));
138 static void check_for_uninitialized_const_var
PROTO((tree
));
139 static unsigned long typename_hash
PROTO((hash_table_key
));
140 static boolean typename_compare
PROTO((hash_table_key
, hash_table_key
));
141 static void push_binding
PROTO((tree
, tree
, struct binding_level
*));
142 static int add_binding
PROTO((tree
, tree
));
143 static void pop_binding
PROTO((tree
, tree
));
144 static tree local_variable_p
PROTO((tree
*));
145 static tree find_binding
PROTO((tree
, tree
));
146 static tree select_decl
PROTO((tree
, int));
147 static int lookup_flags
PROTO((int, int));
148 static tree qualify_lookup
PROTO((tree
, int));
149 static tree record_builtin_java_type
PROTO((const char *, int));
150 static const char *tag_name
PROTO((enum tag_types code
));
151 static void find_class_binding_level
PROTO((void));
152 static struct binding_level
*innermost_nonclass_level
PROTO((void));
153 static void warn_about_implicit_typename_lookup
PROTO((tree
, tree
));
154 static int walk_namespaces_r
PROTO((tree
, walk_namespaces_fn
, void *));
155 static int walk_globals_r
PROTO((tree
, void *));
156 static void add_decl_to_level
PROTO((tree
, struct binding_level
*));
157 static tree make_label_decl
PROTO((tree
, int));
158 static void pop_label
PROTO((tree
));
159 static void pop_labels
PROTO((tree
));
160 static void maybe_deduce_size_from_array_init
PROTO((tree
, tree
));
161 static void layout_var_decl
PROTO((tree
));
162 static void maybe_commonize_var
PROTO((tree
));
163 static tree check_initializer
PROTO((tree
, tree
));
164 static void make_rtl_for_nonlocal_decl
PROTO((tree
, tree
, const char *));
165 static void push_cp_function_context
PROTO((struct function
*));
166 static void pop_cp_function_context
PROTO((struct function
*));
167 static void mark_binding_level
PROTO((void *));
168 static void mark_cp_function_context
PROTO((struct function
*));
169 static void mark_saved_scope
PROTO((void *));
170 static void mark_lang_function
PROTO((struct language_function
*));
171 static void mark_stmt_tree
PROTO((struct stmt_tree
*));
172 static void save_function_data
PROTO((tree
));
173 static void check_function_type
PROTO((tree
));
174 static void destroy_local_static
PROTO((tree
));
175 static void destroy_local_var
PROTO((tree
));
176 static void finish_constructor_body
PROTO((void));
177 static void finish_destructor_body
PROTO((void));
179 #if defined (DEBUG_CP_BINDING_LEVELS)
180 static void indent
PROTO((void));
183 /* Erroneous argument lists can use this *IFF* they do not modify it. */
184 tree error_mark_list
;
186 /* The following symbols are subsumed in the cp_global_trees array, and
187 listed here individually for documentation purposes.
190 tree wchar_decl_node;
193 tree vtable_entry_type;
194 tree delta_type_node;
197 tree __baselist_desc_type_node;
198 tree __i_desc_type_node, __m_desc_type_node;
199 tree __t_desc_array_type, __i_desc_array_type, __m_desc_array_type;
201 tree __t_desc_type_node;
203 tree __tp_desc_type_node;
205 tree __access_mode_type_node;
206 tree __bltn_desc_type_node, __user_desc_type_node, __class_desc_type_node;
207 tree __ptr_desc_type_node, __attr_desc_type_node, __func_desc_type_node;
208 tree __ptmf_desc_type_node, __ptmd_desc_type_node;
210 Not needed yet? May be needed one day?
211 tree __bltn_desc_array_type, __user_desc_array_type, __class_desc_array_type;
212 tree __ptr_desc_array_type, __attr_dec_array_type, __func_desc_array_type;
213 tree __ptmf_desc_array_type, __ptmd_desc_array_type;
216 tree class_star_type_node;
217 tree class_type_node, record_type_node, union_type_node, enum_type_node;
218 tree unknown_type_node;
220 Array type `vtable_entry_type[]'
223 tree vtbl_ptr_type_node;
229 A FUNCTION_DECL which can call `abort'. Not necessarily the
230 one that the user will declare, but sufficient to be called
231 by routines that want to abort the program.
235 The FUNCTION_DECL for the default `::operator delete'.
237 tree global_delete_fndecl;
240 tree type_info_type_node, tinfo_fn_id, tinfo_fn_type;
244 tree cp_global_trees
[CPTI_MAX
];
246 /* Indicates that there is a type value in some namespace, although
247 that is not necessarily in scope at the moment. */
249 static tree global_type_node
;
254 /* Expect only namespace names now. */
255 static int only_namespace_names
;
257 /* In a destructor, the last insn emitted after the start of the
258 function and the parms. */
260 #define last_dtor_insn cp_function_chain->x_last_dtor_insn
262 /* In a constructor, the last insn emitted after the start of the
263 function and the parms, the exception specification and any
264 function-try-block. The constructor initializers are emitted after
267 #define last_parm_cleanup_insn cp_function_chain->x_last_parm_cleanup_insn
269 /* If original DECL_RESULT of current function was a register,
270 but due to being an addressable named return value, would up
271 on the stack, this variable holds the named return value's
272 original location. */
274 #define original_result_rtx cp_function_chain->x_result_rtx
276 struct named_label_list
278 struct binding_level
*binding_level
;
281 const char *filename_o_goto
;
283 struct named_label_list
*next
;
286 /* Used only for jumps to as-yet undefined labels, since jumps to
287 defined labels can have their validity checked by stmt.c. */
289 #define named_label_uses cp_function_chain->x_named_label_uses
291 /* A list of objects which have constructors or destructors
292 which reside in the global scope. The decl is stored in
293 the TREE_VALUE slot and the initializer is stored
294 in the TREE_PURPOSE slot. */
295 tree static_aggregates
;
299 /* A node for the integer constants 2, and 3. */
301 tree integer_two_node
, integer_three_node
;
303 /* While defining an enum type, this is 1 plus the last enumerator
306 static tree enum_next_value
;
308 /* Nonzero means that there was overflow computing enum_next_value. */
310 static int enum_overflow
;
312 /* Parsing a function declarator leaves here a chain of structure
313 and enum types declared in the parmlist. */
315 static tree last_function_parm_tags
;
317 /* Similar, for last_function_parm_tags. */
318 tree last_function_parms
;
319 static tree current_function_parm_tags
;
321 /* A list (chain of TREE_LIST nodes) of all LABEL_DECLs in the function
322 that have names. Here so we can clear out their names' definitions
323 at the end of the function. The TREE_VALUE is a LABEL_DECL; the
324 TREE_PURPOSE is the previous binding of the label. */
326 #define named_labels cp_function_chain->x_named_labels
328 /* The FUNCTION_DECL for the function currently being compiled,
329 or 0 if between functions. */
330 tree current_function_decl
;
332 /* Set to 0 at beginning of a function definition, and whenever
333 a label (case or named) is defined. Set to value of expression
334 returned from function when that value can be transformed into
335 a named return value. */
337 tree current_function_return_value
;
339 /* Nonzero means give `double' the same size as `float'. */
341 extern int flag_short_double
;
343 /* Nonzero means don't recognize any builtin functions. */
345 extern int flag_no_builtin
;
347 /* Nonzero means don't recognize the non-ANSI builtin functions.
350 extern int flag_no_nonansi_builtin
;
352 /* Nonzero means enable obscure ANSI features and disable GNU extensions
353 that might cause ANSI-compliant code to be miscompiled. */
355 extern int flag_ansi
;
357 /* Nonzero if we want to support huge (> 2^(sizeof(short)*8-1) bytes)
359 extern int flag_huge_objects
;
361 /* Nonzero if we want to conserve space in the .o files. We do this
362 by putting uninitialized data and runtime initialized data into
363 .common instead of .data at the expense of not flagging multiple
365 extern int flag_conserve_space
;
367 /* C and C++ flags are in decl2.c. */
369 /* Flag used when debugging spew.c */
371 extern int spew_debug
;
373 /* A expression of value 0 with the same precision as a sizetype
375 tree signed_size_zero_node
;
377 /* The name of the anonymous namespace, throughout this translation
379 tree anonymous_namespace_name
;
382 /* For each binding contour we allocate a binding_level structure
383 which records the names defined in that contour.
386 1) one for each function definition,
387 where internal declarations of the parameters appear.
388 2) one for each compound statement,
389 to record its declarations.
391 The current meaning of a name can be found by searching the levels
392 from the current one out to the global one.
394 Off to the side, may be the class_binding_level. This exists only
395 to catch class-local declarations. It is otherwise nonexistent.
397 Also there may be binding levels that catch cleanups that must be
398 run when exceptions occur. Thus, to see whether a name is bound in
399 the current scope, it is not enough to look in the
400 CURRENT_BINDING_LEVEL. You should use lookup_name_current_level
403 /* Note that the information in the `names' component of the global contour
404 is duplicated in the IDENTIFIER_GLOBAL_VALUEs of all identifiers. */
408 /* A chain of _DECL nodes for all variables, constants, functions,
409 and typedef types. These are in the reverse of the order
410 supplied. There may be OVERLOADs on this list, too, but they
411 are wrapped in TREE_LISTs; the TREE_VALUE is the OVERLOAD. */
414 /* A list of structure, union and enum definitions, for looking up
416 It is a chain of TREE_LIST nodes, each of whose TREE_PURPOSE is a name,
417 or NULL_TREE; and whose TREE_VALUE is a RECORD_TYPE, UNION_TYPE,
418 or ENUMERAL_TYPE node.
420 C++: the TREE_VALUE nodes can be simple types for
421 component_bindings. */
424 /* A list of USING_DECL nodes. */
427 /* A list of used namespaces. PURPOSE is the namespace,
428 VALUE the common ancestor with this binding_level's namespace. */
429 tree using_directives
;
431 /* If this binding level is the binding level for a class, then
432 class_shadowed is a TREE_LIST. The TREE_PURPOSE of each node
433 is the name of an entity bound in the class; the TREE_VALUE is
434 the IDENTIFIER_CLASS_VALUE before we entered the class. Thus,
435 when leaving class scope, we can restore the
436 IDENTIFIER_CLASS_VALUE by walking this list. The TREE_TYPE is
437 the DECL bound by this name in the class. */
440 /* Similar to class_shadowed, but for IDENTIFIER_TYPE_VALUE, and
441 is used for all binding levels. */
444 /* A TREE_LIST. Each TREE_VALUE is the LABEL_DECL for a local
445 label in this scope. The TREE_PURPOSE is the previous value of
446 the IDENTIFIER_LABEL VALUE. */
447 tree shadowed_labels
;
449 /* For each level (except not the global one),
450 a chain of BLOCK nodes for all the levels
451 that were entered and exited one level down. */
454 /* The BLOCK node for this level, if one has been preallocated.
455 If 0, the BLOCK is allocated (if needed) when the level is popped. */
458 /* The binding level which this one is contained in (inherits from). */
459 struct binding_level
*level_chain
;
461 /* List of decls in `names' that have incomplete
462 structure or union types. */
465 /* List of VAR_DECLS saved from a previous for statement.
466 These would be dead in ANSI-conforming code, but might
467 be referenced in ARM-era code. These are stored in a
468 TREE_LIST; the TREE_VALUE is the actual declaration. */
469 tree dead_vars_from_for
;
471 /* 1 for the level that holds the parameters of a function.
472 2 for the level that holds a class declaration.
473 3 for levels that hold parameter declarations. */
474 unsigned parm_flag
: 4;
476 /* 1 means make a BLOCK for this level regardless of all else.
477 2 for temporary binding contours created by the compiler. */
480 /* Nonzero if this level "doesn't exist" for tags. */
481 unsigned tag_transparent
: 1;
483 /* Nonzero if this level can safely have additional
484 cleanup-needing variables added to it. */
485 unsigned more_cleanups_ok
: 1;
486 unsigned have_cleanups
: 1;
488 /* Nonzero if this level is for storing the decls for template
489 parameters and generic decls; these decls will be discarded and
490 replaced with a TEMPLATE_DECL. */
491 unsigned pseudo_global
: 1;
493 /* This is set for a namespace binding level. */
494 unsigned namespace_p
: 1;
496 /* True if this level is that of a for-statement where we need to
497 worry about ambiguous (ARM or ANSI) scope rules. */
498 unsigned is_for_scope
: 1;
500 /* True if this level corresponds to an EH region, as for a try block. */
501 unsigned eh_region
: 1;
503 /* One bit left for this word. */
505 #if defined(DEBUG_CP_BINDING_LEVELS)
506 /* Binding depth at which this level began. */
507 unsigned binding_depth
;
508 #endif /* defined(DEBUG_CP_BINDING_LEVELS) */
511 #define NULL_BINDING_LEVEL ((struct binding_level *) NULL)
513 /* The binding level currently in effect. */
515 #define current_binding_level \
517 ? cp_function_chain->bindings \
518 : scope_chain->bindings)
520 /* The binding level of the current class, if any. */
522 #define class_binding_level scope_chain->class_bindings
524 /* A chain of binding_level structures awaiting reuse. */
526 static struct binding_level
*free_binding_level
;
528 /* The outermost binding level, for names of file scope.
529 This is created when the compiler is started and exists
530 through the entire run. */
532 static struct binding_level
*global_binding_level
;
534 /* Nonzero means unconditionally make a BLOCK for the next level pushed. */
536 static int keep_next_level_flag
;
538 #if defined(DEBUG_CP_BINDING_LEVELS)
539 static int binding_depth
= 0;
540 static int is_class_level
= 0;
547 for (i
= 0; i
< binding_depth
*2; i
++)
550 #endif /* defined(DEBUG_CP_BINDING_LEVELS) */
552 static tree pushdecl_with_scope
PROTO((tree
, struct binding_level
*));
555 push_binding_level (newlevel
, tag_transparent
, keep
)
556 struct binding_level
*newlevel
;
557 int tag_transparent
, keep
;
559 /* Add this level to the front of the chain (stack) of levels that
561 bzero ((char*) newlevel
, sizeof (struct binding_level
));
562 newlevel
->level_chain
= current_binding_level
;
563 current_binding_level
= newlevel
;
564 newlevel
->tag_transparent
= tag_transparent
;
565 newlevel
->more_cleanups_ok
= 1;
567 /* We are called before expand_start_bindings, but after
568 expand_eh_region_start for a try block; so we check this now,
569 before the EH block is covered up. */
570 newlevel
->eh_region
= is_eh_region ();
572 newlevel
->keep
= keep
;
573 #if defined(DEBUG_CP_BINDING_LEVELS)
574 newlevel
->binding_depth
= binding_depth
;
576 fprintf (stderr
, "push %s level 0x%08x line %d\n",
577 (is_class_level
) ? "class" : "block", newlevel
, lineno
);
580 #endif /* defined(DEBUG_CP_BINDING_LEVELS) */
583 /* Find the innermost enclosing class scope, and reset
584 CLASS_BINDING_LEVEL appropriately. */
587 find_class_binding_level ()
589 struct binding_level
*level
= current_binding_level
;
591 while (level
&& level
->parm_flag
!= 2)
592 level
= level
->level_chain
;
593 if (level
&& level
->parm_flag
== 2)
594 class_binding_level
= level
;
596 class_binding_level
= 0;
602 if (global_binding_level
)
604 /* Cannot pop a level, if there are none left to pop. */
605 if (current_binding_level
== global_binding_level
)
606 my_friendly_abort (123);
608 /* Pop the current level, and free the structure for reuse. */
609 #if defined(DEBUG_CP_BINDING_LEVELS)
612 fprintf (stderr
, "pop %s level 0x%08x line %d\n",
613 (is_class_level
) ? "class" : "block",
614 current_binding_level
, lineno
);
615 if (is_class_level
!= (current_binding_level
== class_binding_level
))
618 fprintf (stderr
, "XXX is_class_level != (current_binding_level == class_binding_level)\n");
621 #endif /* defined(DEBUG_CP_BINDING_LEVELS) */
623 register struct binding_level
*level
= current_binding_level
;
624 current_binding_level
= current_binding_level
->level_chain
;
625 level
->level_chain
= free_binding_level
;
626 #if 0 /* defined(DEBUG_CP_BINDING_LEVELS) */
627 if (level
->binding_depth
!= binding_depth
)
629 #endif /* defined(DEBUG_CP_BINDING_LEVELS) */
630 free_binding_level
= level
;
631 find_class_binding_level ();
636 suspend_binding_level ()
638 if (class_binding_level
)
639 current_binding_level
= class_binding_level
;
641 if (global_binding_level
)
643 /* Cannot suspend a level, if there are none left to suspend. */
644 if (current_binding_level
== global_binding_level
)
645 my_friendly_abort (123);
647 /* Suspend the current level. */
648 #if defined(DEBUG_CP_BINDING_LEVELS)
651 fprintf (stderr
, "suspend %s level 0x%08x line %d\n",
652 (is_class_level
) ? "class" : "block",
653 current_binding_level
, lineno
);
654 if (is_class_level
!= (current_binding_level
== class_binding_level
))
657 fprintf (stderr
, "XXX is_class_level != (current_binding_level == class_binding_level)\n");
660 #endif /* defined(DEBUG_CP_BINDING_LEVELS) */
661 current_binding_level
= current_binding_level
->level_chain
;
662 find_class_binding_level ();
666 resume_binding_level (b
)
667 struct binding_level
*b
;
669 /* Resuming binding levels is meant only for namespaces,
670 and those cannot nest into classes. */
671 my_friendly_assert(!class_binding_level
, 386);
672 /* Also, resuming a non-directly nested namespace is a no-no. */
673 my_friendly_assert(b
->level_chain
== current_binding_level
, 386);
674 current_binding_level
= b
;
675 #if defined(DEBUG_CP_BINDING_LEVELS)
676 b
->binding_depth
= binding_depth
;
678 fprintf (stderr
, "resume %s level 0x%08x line %d\n",
679 (is_class_level
) ? "class" : "block", b
, lineno
);
682 #endif /* defined(DEBUG_CP_BINDING_LEVELS) */
685 /* Create a new `struct binding_level'. */
688 struct binding_level
*
689 make_binding_level ()
692 return (struct binding_level
*) xmalloc (sizeof (struct binding_level
));
695 /* Nonzero if we are currently in the global binding level. */
700 return current_binding_level
== global_binding_level
;
703 /* Return the innermost binding level that is not for a class scope. */
705 static struct binding_level
*
706 innermost_nonclass_level ()
708 struct binding_level
*b
;
710 b
= current_binding_level
;
711 while (b
->parm_flag
== 2)
717 /* Nonzero if we are currently in a toplevel binding level. This
718 means either the global binding level or a namespace in a toplevel
719 binding level. Since there are no non-toplevel namespace levels,
720 this really means any namespace or pseudo-global level. We also
721 include a class whose context is toplevel. */
724 toplevel_bindings_p ()
726 struct binding_level
*b
= innermost_nonclass_level ();
728 return b
->namespace_p
|| b
->pseudo_global
;
731 /* Nonzero if this is a namespace scope, or if we are defining a class
732 which is itself at namespace scope, or whose enclosing class is
733 such a class, etc. */
736 namespace_bindings_p ()
738 struct binding_level
*b
= innermost_nonclass_level ();
740 return b
->namespace_p
;
743 /* If KEEP is non-zero, make a BLOCK node for the next binding level,
744 unconditionally. Otherwise, use the normal logic to decide whether
745 or not to create a BLOCK. */
748 keep_next_level (keep
)
751 keep_next_level_flag
= keep
;
754 /* Nonzero if the current level needs to have a BLOCK made. */
759 return (current_binding_level
->blocks
!= NULL_TREE
760 || current_binding_level
->keep
761 || current_binding_level
->names
!= NULL_TREE
762 || (current_binding_level
->tags
!= NULL_TREE
763 && !current_binding_level
->tag_transparent
));
767 declare_pseudo_global_level ()
769 current_binding_level
->pseudo_global
= 1;
773 declare_namespace_level ()
775 current_binding_level
->namespace_p
= 1;
779 pseudo_global_level_p ()
781 return current_binding_level
->pseudo_global
;
785 set_class_shadows (shadows
)
788 class_binding_level
->class_shadowed
= shadows
;
791 /* Enter a new binding level.
792 If TAG_TRANSPARENT is nonzero, do so only for the name space of variables,
793 not for that of tags. */
796 pushlevel (tag_transparent
)
799 struct binding_level
*newlevel
;
801 if (current_function
&& !doing_semantic_analysis_p ())
804 /* Reuse or create a struct for this binding level. */
805 #if defined(DEBUG_CP_BINDING_LEVELS)
807 #else /* !defined(DEBUG_CP_BINDING_LEVELS) */
808 if (free_binding_level
)
809 #endif /* !defined(DEBUG_CP_BINDING_LEVELS) */
811 newlevel
= free_binding_level
;
812 free_binding_level
= free_binding_level
->level_chain
;
815 newlevel
= make_binding_level ();
817 push_binding_level (newlevel
, tag_transparent
, keep_next_level_flag
);
818 GNU_xref_start_scope ((HOST_WIDE_INT
) newlevel
);
819 keep_next_level_flag
= 0;
823 note_level_for_for ()
825 current_binding_level
->is_for_scope
= 1;
829 pushlevel_temporary (tag_transparent
)
832 pushlevel (tag_transparent
);
833 current_binding_level
->keep
= 2;
836 /* Note we don't call push_momentary() here. Otherwise, it would cause
837 cleanups to be allocated on the momentary obstack, and they will be
838 overwritten by the next statement. */
840 expand_start_bindings (0);
843 /* For a binding between a name and an entity at a block scope,
844 this is the `struct binding_level' for the block. */
845 #define BINDING_LEVEL(NODE) \
846 (((struct tree_binding*)NODE)->scope.level)
848 /* Make DECL the innermost binding for ID. The LEVEL is the binding
849 level at which this declaration is being bound. */
852 push_binding (id
, decl
, level
)
855 struct binding_level
* level
;
859 binding
= make_node (CPLUS_BINDING
);
861 /* Now, fill in the binding information. */
862 BINDING_VALUE (binding
) = decl
;
863 BINDING_TYPE (binding
) = NULL_TREE
;
864 BINDING_LEVEL (binding
) = level
;
865 INHERITED_VALUE_BINDING_P (binding
) = 0;
866 LOCAL_BINDING_P (binding
) = (level
!= class_binding_level
);
867 BINDING_HAS_LEVEL_P (binding
) = 1;
869 /* And put it on the front of the list of bindings for ID. */
870 TREE_CHAIN (binding
) = IDENTIFIER_BINDING (id
);
871 IDENTIFIER_BINDING (id
) = binding
;
874 /* ID is already bound in the current scope. But, DECL is an
875 additional binding for ID in the same scope. This is the `struct
876 stat' hack whereby a non-typedef class-name or enum-name can be
877 bound at the same level as some other kind of entity. It's the
878 responsibility of the caller to check that inserting this name is
879 legal here. Returns nonzero if the new binding was successful. */
881 add_binding (id
, decl
)
885 tree binding
= IDENTIFIER_BINDING (id
);
888 if (TREE_CODE (decl
) == TYPE_DECL
&& DECL_ARTIFICIAL (decl
))
889 /* The new name is the type name. */
890 BINDING_TYPE (binding
) = decl
;
891 else if (!BINDING_VALUE (binding
))
892 /* This situation arises when push_class_level_binding moves an
893 inherited type-binding out of the way to make room for a new
895 BINDING_VALUE (binding
) = decl
;
896 else if (TREE_CODE (BINDING_VALUE (binding
)) == TYPE_DECL
897 && DECL_ARTIFICIAL (BINDING_VALUE (binding
)))
899 /* The old binding was a type name. It was placed in
900 BINDING_VALUE because it was thought, at the point it was
901 declared, to be the only entity with such a name. Move the
902 type name into the type slot; it is now hidden by the new
904 BINDING_TYPE (binding
) = BINDING_VALUE (binding
);
905 BINDING_VALUE (binding
) = decl
;
906 INHERITED_VALUE_BINDING_P (binding
) = 0;
908 else if (TREE_CODE (BINDING_VALUE (binding
)) == TYPE_DECL
909 && TREE_CODE (decl
) == TYPE_DECL
910 && DECL_NAME (decl
) == DECL_NAME (BINDING_VALUE (binding
))
911 && same_type_p (TREE_TYPE (decl
),
912 TREE_TYPE (BINDING_VALUE (binding
))))
913 /* We have two typedef-names, both naming the same type to have
914 the same name. This is OK because of:
918 In a given scope, a typedef specifier can be used to redefine
919 the name of any type declared in that scope to refer to the
920 type to which it already refers. */
924 cp_error ("declaration of `%#D'", decl
);
925 cp_error_at ("conflicts with previous declaration `%#D'",
926 BINDING_VALUE (binding
));
933 /* Add DECL to the list of things declared in B. */
936 add_decl_to_level (decl
, b
)
938 struct binding_level
*b
;
940 /* We build up the list in reverse order, and reverse it later if
942 TREE_CHAIN (decl
) = b
->names
;
946 /* Bind DECL to ID in the current_binding_level, assumed to be a local
947 binding level. If PUSH_USING is set in FLAGS, we know that DECL
948 doesn't really belong to this binding level, that it got here
949 through a using-declaration. */
952 push_local_binding (id
, decl
, flags
)
957 struct binding_level
*b
;
959 /* Skip over any local classes. This makes sense if we call
960 push_local_binding with a friend decl of a local class. */
961 b
= current_binding_level
;
962 while (b
->parm_flag
== 2)
965 if (lookup_name_current_level (id
))
967 /* Supplement the existing binding. */
968 if (!add_binding (id
, decl
))
969 /* It didn't work. Something else must be bound at this
970 level. Do not add DECL to the list of things to pop
975 /* Create a new binding. */
976 push_binding (id
, decl
, b
);
978 if (TREE_CODE (decl
) == OVERLOAD
|| (flags
& PUSH_USING
))
979 /* We must put the OVERLOAD into a TREE_LIST since the
980 TREE_CHAIN of an OVERLOAD is already used. Similarly for
981 decls that got here through a using-declaration. */
982 decl
= build_tree_list (NULL_TREE
, decl
);
984 /* And put DECL on the list of things declared by the current
986 add_decl_to_level (decl
, b
);
989 /* Bind DECL to ID in the class_binding_level. Returns nonzero if the
990 binding was successful. */
993 push_class_binding (id
, decl
)
998 tree binding
= IDENTIFIER_BINDING (id
);
1001 /* Note that we declared this value so that we can issue an error if
1002 this an illegal redeclaration of a name already used for some
1004 note_name_declared_in_class (id
, decl
);
1006 if (binding
&& BINDING_LEVEL (binding
) == class_binding_level
)
1007 /* Supplement the existing binding. */
1008 result
= add_binding (id
, decl
);
1010 /* Create a new binding. */
1011 push_binding (id
, decl
, class_binding_level
);
1013 /* Update the IDENTIFIER_CLASS_VALUE for this ID to be the
1014 class-level declaration. Note that we do not use DECL here
1015 because of the possibility of the `struct stat' hack; if DECL is
1016 a class-name or enum-name we might prefer a field-name, or some
1018 IDENTIFIER_CLASS_VALUE (id
) = BINDING_VALUE (IDENTIFIER_BINDING (id
));
1020 /* If this is a binding from a base class, mark it as such. */
1021 binding
= IDENTIFIER_BINDING (id
);
1022 if (BINDING_VALUE (binding
) == decl
&& TREE_CODE (decl
) != TREE_LIST
)
1024 /* Any implicit typename must be from a base-class. The
1025 context for an implicit typename declaration is always
1026 the derived class in which the lookup was done, so the checks
1027 based on the context of DECL below will not trigger. */
1028 if (IMPLICIT_TYPENAME_TYPE_DECL_P (decl
))
1029 INHERITED_VALUE_BINDING_P (binding
) = 1;
1032 if (TREE_CODE (decl
) == OVERLOAD
)
1033 context
= DECL_REAL_CONTEXT (OVL_CURRENT (decl
));
1036 my_friendly_assert (TREE_CODE_CLASS (TREE_CODE (decl
)) == 'd',
1038 context
= DECL_REAL_CONTEXT (decl
);
1041 if (is_properly_derived_from (current_class_type
, context
))
1042 INHERITED_VALUE_BINDING_P (binding
) = 1;
1044 INHERITED_VALUE_BINDING_P (binding
) = 0;
1047 else if (BINDING_VALUE (binding
) == decl
)
1048 /* We only encounter a TREE_LIST when push_class_decls detects an
1049 ambiguity. Such an ambiguity can be overridden by a definition
1051 INHERITED_VALUE_BINDING_P (binding
) = 1;
1056 /* Remove the binding for DECL which should be the innermost binding
1060 pop_binding (id
, decl
)
1066 if (id
== NULL_TREE
)
1067 /* It's easiest to write the loops that call this function without
1068 checking whether or not the entities involved have names. We
1069 get here for such an entity. */
1072 /* Get the innermost binding for ID. */
1073 binding
= IDENTIFIER_BINDING (id
);
1075 /* The name should be bound. */
1076 my_friendly_assert (binding
!= NULL_TREE
, 0);
1078 /* The DECL will be either the ordinary binding or the type
1079 binding for this identifier. Remove that binding. */
1080 if (BINDING_VALUE (binding
) == decl
)
1081 BINDING_VALUE (binding
) = NULL_TREE
;
1082 else if (BINDING_TYPE (binding
) == decl
)
1083 BINDING_TYPE (binding
) = NULL_TREE
;
1085 my_friendly_abort (0);
1087 if (!BINDING_VALUE (binding
) && !BINDING_TYPE (binding
))
1088 /* We're completely done with the innermost binding for this
1089 identifier. Unhook it from the list of bindings. */
1090 IDENTIFIER_BINDING (id
) = TREE_CHAIN (binding
);
1093 /* When a label goes out of scope, check to see if that label was used
1094 in a valid manner, and issue any appropriate warnings or errors. */
1100 tree label
= TREE_VALUE (link
);
1102 if (!processing_template_decl
&& doing_semantic_analysis_p ())
1104 if (DECL_INITIAL (label
) == NULL_TREE
)
1106 cp_error_at ("label `%D' used but not defined", label
);
1107 /* Avoid crashing later. */
1108 define_label (input_filename
, 1, DECL_NAME (label
));
1110 else if (warn_unused
&& !TREE_USED (label
))
1111 cp_warning_at ("label `%D' defined but not used", label
);
1114 SET_IDENTIFIER_LABEL_VALUE (DECL_NAME (label
), TREE_PURPOSE (link
));
1117 /* At the end of a function, all labels declared within the fucntion
1118 go out of scope. BLOCK is the top-level block for the
1127 /* Clear out the definitions of all label names, since their scopes
1129 for (link
= named_labels
; link
; link
= TREE_CHAIN (link
))
1132 /* Put the labels into the "variables" of the top-level block,
1133 so debugger can see them. */
1134 TREE_CHAIN (TREE_VALUE (link
)) = BLOCK_VARS (block
);
1135 BLOCK_VARS (block
) = TREE_VALUE (link
);
1138 named_labels
= NULL_TREE
;
1141 /* Exit a binding level.
1142 Pop the level off, and restore the state of the identifier-decl mappings
1143 that were in effect when this level was entered.
1145 If KEEP == 1, this level had explicit declarations, so
1146 and create a "block" (a BLOCK node) for the level
1147 to record its declarations and subblocks for symbol table output.
1149 If FUNCTIONBODY is nonzero, this level is the body of a function,
1150 so create a block as if KEEP were set and also clear out all
1153 If REVERSE is nonzero, reverse the order of decls before putting
1154 them into the BLOCK. */
1157 poplevel (keep
, reverse
, functionbody
)
1163 /* The chain of decls was accumulated in reverse order.
1164 Put it into forward order, just for cleanliness. */
1166 int tmp
= functionbody
;
1167 int real_functionbody
;
1170 tree block
= NULL_TREE
;
1172 int block_previously_created
;
1173 int leaving_for_scope
;
1175 if (current_function
&& !doing_semantic_analysis_p ())
1178 my_friendly_assert (current_binding_level
->parm_flag
!= 2,
1181 real_functionbody
= (current_binding_level
->keep
== 2
1182 ? ((functionbody
= 0), tmp
) : functionbody
);
1183 tags
= functionbody
>= 0 ? current_binding_level
->tags
: 0;
1184 subblocks
= functionbody
>= 0 ? current_binding_level
->blocks
: 0;
1186 my_friendly_assert (!current_binding_level
->class_shadowed
,
1189 /* We used to use KEEP == 2 to indicate that the new block should go
1190 at the beginning of the list of blocks at this binding level,
1191 rather than the end. This hack is no longer used. */
1192 my_friendly_assert (keep
== 0 || keep
== 1, 0);
1194 GNU_xref_end_scope ((HOST_WIDE_INT
) current_binding_level
,
1195 (HOST_WIDE_INT
) current_binding_level
->level_chain
,
1196 current_binding_level
->parm_flag
,
1197 current_binding_level
->keep
);
1199 if (current_binding_level
->keep
== 1)
1202 /* Get the decls in the order they were written.
1203 Usually current_binding_level->names is in reverse order.
1204 But parameter decls were previously put in forward order. */
1207 current_binding_level
->names
1208 = decls
= nreverse (current_binding_level
->names
);
1210 decls
= current_binding_level
->names
;
1212 /* Output any nested inline functions within this block
1213 if they weren't already output. */
1215 for (decl
= decls
; decl
; decl
= TREE_CHAIN (decl
))
1216 if (TREE_CODE (decl
) == FUNCTION_DECL
1217 && ! TREE_ASM_WRITTEN (decl
)
1218 && DECL_INITIAL (decl
) != NULL_TREE
1219 && TREE_ADDRESSABLE (decl
)
1220 && decl_function_context (decl
) == current_function_decl
)
1222 /* If this decl was copied from a file-scope decl
1223 on account of a block-scope extern decl,
1224 propagate TREE_ADDRESSABLE to the file-scope decl. */
1225 if (DECL_ABSTRACT_ORIGIN (decl
) != NULL_TREE
)
1226 TREE_ADDRESSABLE (DECL_ABSTRACT_ORIGIN (decl
)) = 1;
1229 push_function_context ();
1230 output_inline_function (decl
);
1231 pop_function_context ();
1235 /* If there were any declarations or structure tags in that level,
1236 or if this level is a function body,
1237 create a BLOCK to record them for the life of this function. */
1240 block_previously_created
= (current_binding_level
->this_block
!= NULL_TREE
);
1241 if (block_previously_created
)
1242 block
= current_binding_level
->this_block
;
1243 else if (keep
== 1 || functionbody
)
1244 block
= make_node (BLOCK
);
1245 if (block
!= NULL_TREE
)
1247 if (block_previously_created
)
1249 if (decls
|| tags
|| subblocks
)
1251 if (BLOCK_VARS (block
) || BLOCK_TYPE_TAGS (block
))
1252 warning ("internal compiler error: debugging info corrupted");
1254 BLOCK_VARS (block
) = decls
;
1255 BLOCK_TYPE_TAGS (block
) = tags
;
1257 /* We can have previous subblocks and new subblocks when
1258 doing fixup_gotos with complex cleanups. We chain the new
1259 subblocks onto the end of any pre-existing subblocks. */
1260 BLOCK_SUBBLOCKS (block
) = chainon (BLOCK_SUBBLOCKS (block
),
1263 /* If we created the block earlier on, and we are just
1264 diddling it now, then it already should have a proper
1265 BLOCK_END_NOTE value associated with it. */
1269 BLOCK_VARS (block
) = decls
;
1270 BLOCK_TYPE_TAGS (block
) = tags
;
1271 BLOCK_SUBBLOCKS (block
) = subblocks
;
1272 /* Otherwise, for a new block, install a new BLOCK_END_NOTE
1274 remember_end_note (block
);
1278 /* In each subblock, record that this is its superior. */
1281 for (link
= subblocks
; link
; link
= TREE_CHAIN (link
))
1282 BLOCK_SUPERCONTEXT (link
) = block
;
1284 /* We still support the old for-scope rules, whereby the variables
1285 in a for-init statement were in scope after the for-statement
1286 ended. We only use the new rules in flag_new_for_scope is
1289 = current_binding_level
->is_for_scope
&& flag_new_for_scope
== 1;
1291 /* Remove declarations for all the DECLs in this level. */
1292 for (link
= decls
; link
; link
= TREE_CHAIN (link
))
1294 if (leaving_for_scope
&& TREE_CODE (link
) == VAR_DECL
)
1297 = TREE_CHAIN (IDENTIFIER_BINDING (DECL_NAME (link
)));
1301 ns_binding
= IDENTIFIER_NAMESPACE_VALUE (DECL_NAME (link
));
1303 ns_binding
= NULL_TREE
;
1306 && (BINDING_LEVEL (outer_binding
)
1307 == current_binding_level
->level_chain
))
1308 /* We have something like:
1313 and we are leaving the `for' scope. There's no reason to
1314 keep the binding of the inner `i' in this case. */
1315 pop_binding (DECL_NAME (link
), link
);
1316 else if ((outer_binding
1317 && (TREE_CODE (BINDING_VALUE (outer_binding
))
1320 && TREE_CODE (ns_binding
) == TYPE_DECL
))
1321 /* Here, we have something like:
1329 We must pop the for-scope binding so we know what's a
1330 type and what isn't. */
1331 pop_binding (DECL_NAME (link
), link
);
1334 /* Mark this VAR_DECL as dead so that we can tell we left it
1335 there only for backward compatibility. */
1336 DECL_DEAD_FOR_LOCAL (link
) = 1;
1338 /* Keep track of what should of have happenned when we
1339 popped the binding. */
1340 if (outer_binding
&& BINDING_VALUE (outer_binding
))
1341 DECL_SHADOWED_FOR_VAR (link
)
1342 = BINDING_VALUE (outer_binding
);
1344 /* Add it to the list of dead variables in the next
1345 outermost binding to that we can remove these when we
1346 leave that binding. */
1347 current_binding_level
->level_chain
->dead_vars_from_for
1348 = tree_cons (NULL_TREE
, link
,
1349 current_binding_level
->level_chain
->
1350 dead_vars_from_for
);
1352 /* Although we don't pop the CPLUS_BINDING, we do clear
1353 its BINDING_LEVEL since the level is going away now. */
1354 BINDING_LEVEL (IDENTIFIER_BINDING (DECL_NAME (link
)))
1360 /* Remove the binding. */
1362 if (TREE_CODE (decl
) == TREE_LIST
)
1363 decl
= TREE_VALUE (decl
);
1364 if (TREE_CODE_CLASS (TREE_CODE (decl
)) == 'd')
1365 pop_binding (DECL_NAME (decl
), decl
);
1366 else if (TREE_CODE (decl
) == OVERLOAD
)
1367 pop_binding (DECL_NAME (OVL_FUNCTION (decl
)), decl
);
1369 my_friendly_abort (0);
1373 /* Remove declarations for any `for' variables from inner scopes
1374 that we kept around. */
1375 for (link
= current_binding_level
->dead_vars_from_for
;
1376 link
; link
= TREE_CHAIN (link
))
1377 pop_binding (DECL_NAME (TREE_VALUE (link
)), TREE_VALUE (link
));
1379 /* Restore the IDENTIFIER_TYPE_VALUEs. */
1380 for (link
= current_binding_level
->type_shadowed
;
1381 link
; link
= TREE_CHAIN (link
))
1382 SET_IDENTIFIER_TYPE_VALUE (TREE_PURPOSE (link
), TREE_VALUE (link
));
1384 /* Restore the IDENTIFIER_LABEL_VALUEs for local labels. */
1385 for (link
= current_binding_level
->shadowed_labels
;
1387 link
= TREE_CHAIN (link
))
1390 /* There may be OVERLOADs (wrapped in TREE_LISTs) on the BLOCK_VARs
1391 list if a `using' declaration put them there. The debugging
1392 back-ends won't understand OVERLOAD, so we remove them here.
1393 Because the BLOCK_VARS are (temporarily) shared with
1394 CURRENT_BINDING_LEVEL->NAMES we must do this fixup after we have
1395 popped all the bindings. */
1400 for (d
= &BLOCK_VARS (block
); *d
; )
1402 if (TREE_CODE (*d
) == TREE_LIST
)
1403 *d
= TREE_CHAIN (*d
);
1405 d
= &TREE_CHAIN (*d
);
1409 /* If the level being exited is the top level of a function,
1410 check over all the labels. */
1413 /* Since this is the top level block of a function, the vars are
1414 the function's parameters. Don't leave them in the BLOCK
1415 because they are found in the FUNCTION_DECL instead. */
1416 BLOCK_VARS (block
) = 0;
1420 /* Any uses of undefined labels now operate under constraints
1421 of next binding contour. */
1422 if (current_function
)
1424 struct binding_level
*level_chain
;
1425 level_chain
= current_binding_level
->level_chain
;
1428 struct named_label_list
*labels
;
1429 for (labels
= named_label_uses
; labels
; labels
= labels
->next
)
1430 if (labels
->binding_level
== current_binding_level
)
1432 labels
->binding_level
= level_chain
;
1433 labels
->names_in_scope
= level_chain
->names
;
1438 tmp
= current_binding_level
->keep
;
1440 pop_binding_level ();
1442 DECL_INITIAL (current_function_decl
) = block
;
1445 if (!block_previously_created
)
1446 current_binding_level
->blocks
1447 = chainon (current_binding_level
->blocks
, block
);
1449 /* If we did not make a block for the level just exited,
1450 any blocks made for inner levels
1451 (since they cannot be recorded as subblocks in that level)
1452 must be carried forward so they will later become subblocks
1453 of something else. */
1455 current_binding_level
->blocks
1456 = chainon (current_binding_level
->blocks
, subblocks
);
1458 /* Take care of compiler's internal binding structures. */
1461 expand_end_bindings (getdecls (), keep
, 1);
1462 /* Each and every BLOCK node created here in `poplevel' is important
1463 (e.g. for proper debugging information) so if we created one
1464 earlier, mark it as "used". */
1466 TREE_USED (block
) = 1;
1467 block
= poplevel (keep
, reverse
, real_functionbody
);
1470 /* Each and every BLOCK node created here in `poplevel' is important
1471 (e.g. for proper debugging information) so if we created one
1472 earlier, mark it as "used". */
1474 TREE_USED (block
) = 1;
1478 /* Delete the node BLOCK from the current binding level.
1479 This is used for the block inside a stmt expr ({...})
1480 so that the block can be reinserted where appropriate. */
1483 delete_block (block
)
1487 if (current_binding_level
->blocks
== block
)
1488 current_binding_level
->blocks
= TREE_CHAIN (block
);
1489 for (t
= current_binding_level
->blocks
; t
;)
1491 if (TREE_CHAIN (t
) == block
)
1492 TREE_CHAIN (t
) = TREE_CHAIN (block
);
1496 TREE_CHAIN (block
) = NULL_TREE
;
1497 /* Clear TREE_USED which is always set by poplevel.
1498 The flag is set again if insert_block is called. */
1499 TREE_USED (block
) = 0;
1502 /* Insert BLOCK at the end of the list of subblocks of the
1503 current binding level. This is used when a BIND_EXPR is expanded,
1504 to handle the BLOCK node inside the BIND_EXPR. */
1507 insert_block (block
)
1510 TREE_USED (block
) = 1;
1511 current_binding_level
->blocks
1512 = chainon (current_binding_level
->blocks
, block
);
1515 /* Set the BLOCK node for the innermost scope
1516 (the one we are currently in). */
1520 register tree block
;
1522 current_binding_level
->this_block
= block
;
1525 /* Do a pushlevel for class declarations. */
1530 register struct binding_level
*newlevel
;
1532 /* Reuse or create a struct for this binding level. */
1533 #if defined(DEBUG_CP_BINDING_LEVELS)
1535 #else /* !defined(DEBUG_CP_BINDING_LEVELS) */
1536 if (free_binding_level
)
1537 #endif /* !defined(DEBUG_CP_BINDING_LEVELS) */
1539 newlevel
= free_binding_level
;
1540 free_binding_level
= free_binding_level
->level_chain
;
1543 newlevel
= make_binding_level ();
1545 #if defined(DEBUG_CP_BINDING_LEVELS)
1547 #endif /* defined(DEBUG_CP_BINDING_LEVELS) */
1549 push_binding_level (newlevel
, 0, 0);
1551 class_binding_level
= current_binding_level
;
1552 class_binding_level
->parm_flag
= 2;
1555 /* ...and a poplevel for class declarations. */
1560 register struct binding_level
*level
= class_binding_level
;
1563 my_friendly_assert (level
!= 0, 354);
1565 /* If we're leaving a toplevel class, don't bother to do the setting
1566 of IDENTIFIER_CLASS_VALUE to NULL_TREE, since first of all this slot
1567 shouldn't even be used when current_class_type isn't set, and second,
1568 if we don't touch it here, we're able to use the cache effect if the
1569 next time we're entering a class scope, it is the same class. */
1570 if (current_class_depth
!= 1)
1572 struct binding_level
* b
;
1574 /* Clear out our IDENTIFIER_CLASS_VALUEs. */
1575 for (shadowed
= level
->class_shadowed
;
1577 shadowed
= TREE_CHAIN (shadowed
))
1578 IDENTIFIER_CLASS_VALUE (TREE_PURPOSE (shadowed
)) = NULL_TREE
;
1580 /* Find the next enclosing class, and recreate
1581 IDENTIFIER_CLASS_VALUEs appropriate for that class. */
1582 b
= level
->level_chain
;
1583 while (b
&& b
->parm_flag
!= 2)
1587 for (shadowed
= b
->class_shadowed
;
1589 shadowed
= TREE_CHAIN (shadowed
))
1593 t
= IDENTIFIER_BINDING (TREE_PURPOSE (shadowed
));
1594 while (t
&& BINDING_LEVEL (t
) != b
)
1598 IDENTIFIER_CLASS_VALUE (TREE_PURPOSE (shadowed
))
1599 = BINDING_VALUE (t
);
1603 /* Remember to save what IDENTIFIER's were bound in this scope so we
1604 can recover from cache misses. */
1606 previous_class_type
= current_class_type
;
1607 previous_class_values
= class_binding_level
->class_shadowed
;
1609 for (shadowed
= level
->type_shadowed
;
1611 shadowed
= TREE_CHAIN (shadowed
))
1612 SET_IDENTIFIER_TYPE_VALUE (TREE_PURPOSE (shadowed
), TREE_VALUE (shadowed
));
1614 /* Remove the bindings for all of the class-level declarations. */
1615 for (shadowed
= level
->class_shadowed
;
1617 shadowed
= TREE_CHAIN (shadowed
))
1618 pop_binding (TREE_PURPOSE (shadowed
), TREE_TYPE (shadowed
));
1620 GNU_xref_end_scope ((HOST_WIDE_INT
) class_binding_level
,
1621 (HOST_WIDE_INT
) class_binding_level
->level_chain
,
1622 class_binding_level
->parm_flag
,
1623 class_binding_level
->keep
);
1625 /* Now, pop out of the binding level which we created up in the
1626 `pushlevel_class' routine. */
1627 #if defined(DEBUG_CP_BINDING_LEVELS)
1629 #endif /* defined(DEBUG_CP_BINDING_LEVELS) */
1631 pop_binding_level ();
1634 /* We are entering the scope of a class. Clear IDENTIFIER_CLASS_VALUE
1635 for any names in enclosing classes. */
1638 clear_identifier_class_values ()
1642 if (!class_binding_level
)
1645 for (t
= class_binding_level
->class_shadowed
;
1648 IDENTIFIER_CLASS_VALUE (TREE_PURPOSE (t
)) = NULL_TREE
;
1651 /* Returns non-zero if T is a virtual function table. */
1654 vtable_decl_p (t
, data
)
1656 void *data ATTRIBUTE_UNUSED
;
1658 return (TREE_CODE (t
) == VAR_DECL
&& DECL_VIRTUAL_P (t
));
1661 /* Returns non-zero if T is a TYPE_DECL for a type with virtual
1665 vtype_decl_p (t
, data
)
1667 void *data ATTRIBUTE_UNUSED
;
1669 return (TREE_CODE (t
) == TYPE_DECL
1670 && TREE_TYPE (t
) != error_mark_node
1671 && TYPE_LANG_SPECIFIC (TREE_TYPE (t
))
1672 && CLASSTYPE_VSIZE (TREE_TYPE (t
)));
1675 /* Return the declarations that are members of the namespace NS. */
1678 cp_namespace_decls (ns
)
1681 return NAMESPACE_LEVEL (ns
)->names
;
1684 /* Walk all the namespaces contained NAMESPACE, including NAMESPACE
1685 itself, calling F for each. The DATA is passed to F as well. */
1688 walk_namespaces_r (namespace, f
, data
)
1690 walk_namespaces_fn f
;
1696 result
|= (*f
) (namespace, data
);
1698 for (current
= cp_namespace_decls (namespace);
1700 current
= TREE_CHAIN (current
))
1702 if (TREE_CODE (current
) != NAMESPACE_DECL
1703 || DECL_NAMESPACE_ALIAS (current
))
1705 if (!DECL_LANG_SPECIFIC (current
))
1708 my_friendly_assert (current
== std_node
, 393);
1712 /* We found a namespace. */
1713 result
|= walk_namespaces_r (current
, f
, data
);
1719 /* Walk all the namespaces, calling F for each. The DATA is passed to
1723 walk_namespaces (f
, data
)
1724 walk_namespaces_fn f
;
1727 return walk_namespaces_r (global_namespace
, f
, data
);
1730 struct walk_globals_data
{
1731 walk_globals_pred p
;
1736 /* Walk the global declarations in NAMESPACE. Whenever one is found
1737 for which P returns non-zero, call F with its address. If any call
1738 to F returns a non-zero value, return a non-zero value. */
1741 walk_globals_r (namespace, data
)
1745 struct walk_globals_data
* wgd
= (struct walk_globals_data
*) data
;
1746 walk_globals_pred p
= wgd
->p
;
1747 walk_globals_fn f
= wgd
->f
;
1748 void *d
= wgd
->data
;
1752 t
= &NAMESPACE_LEVEL (namespace)->names
;
1759 result
|= (*f
) (t
, d
);
1761 /* If F changed *T, then *T still points at the next item to
1764 t
= &TREE_CHAIN (*t
);
1770 /* Walk the global declarations. Whenever one is found for which P
1771 returns non-zero, call F with its address. If any call to F
1772 returns a non-zero value, return a non-zero value. */
1775 walk_globals (p
, f
, data
)
1776 walk_globals_pred p
;
1780 struct walk_globals_data wgd
;
1785 return walk_namespaces (walk_globals_r
, &wgd
);
1788 /* Call wrapup_globals_declarations for the globals in NAMESPACE. If
1789 DATA is non-NULL, this is the last time we will call
1790 wrapup_global_declarations for this NAMESPACE. */
1793 wrapup_globals_for_namespace (namespace, data
)
1797 tree globals
= cp_namespace_decls (namespace);
1798 int len
= list_length (globals
);
1799 tree
*vec
= (tree
*) alloca (sizeof (tree
) * len
);
1803 int last_time
= (data
!= 0);
1805 if (last_time
&& namespace == global_namespace
)
1806 /* Let compile_file handle the global namespace. */
1809 /* Process the decls in reverse order--earliest first.
1810 Put them into VEC from back to front, then take out from front. */
1812 for (i
= 0, decl
= globals
; i
< len
; i
++, decl
= TREE_CHAIN (decl
))
1813 vec
[len
- i
- 1] = decl
;
1817 check_global_declarations (vec
, len
);
1821 /* Temporarily mark vtables as external. That prevents
1822 wrapup_global_declarations from writing them out; we must process
1823 them ourselves in finish_vtable_vardecl. */
1824 for (i
= 0; i
< len
; ++i
)
1825 if (vtable_decl_p (vec
[i
], /*data=*/0) && !DECL_EXTERNAL (vec
[i
]))
1827 DECL_NOT_REALLY_EXTERN (vec
[i
]) = 1;
1828 DECL_EXTERNAL (vec
[i
]) = 1;
1831 /* Write out any globals that need to be output. */
1832 result
= wrapup_global_declarations (vec
, len
);
1834 /* Undo the hack to DECL_EXTERNAL above. */
1835 for (i
= 0; i
< len
; ++i
)
1836 if (vtable_decl_p (vec
[i
], /*data=*/0)
1837 && DECL_NOT_REALLY_EXTERN (vec
[i
]))
1839 DECL_NOT_REALLY_EXTERN (vec
[i
]) = 0;
1840 DECL_EXTERNAL (vec
[i
]) = 0;
1847 /* Mark ARG (which is really a struct binding_level **) for GC. */
1850 mark_binding_level (arg
)
1853 struct binding_level
*lvl
= *(struct binding_level
**)arg
;
1857 ggc_mark_tree (lvl
->names
);
1858 ggc_mark_tree (lvl
->tags
);
1859 ggc_mark_tree (lvl
->usings
);
1860 ggc_mark_tree (lvl
->using_directives
);
1861 ggc_mark_tree (lvl
->class_shadowed
);
1862 ggc_mark_tree (lvl
->type_shadowed
);
1863 ggc_mark_tree (lvl
->shadowed_labels
);
1864 ggc_mark_tree (lvl
->blocks
);
1865 ggc_mark_tree (lvl
->this_block
);
1866 ggc_mark_tree (lvl
->incomplete
);
1867 ggc_mark_tree (lvl
->dead_vars_from_for
);
1869 lvl
= lvl
->level_chain
;
1873 /* For debugging. */
1874 static int no_print_functions
= 0;
1875 static int no_print_builtins
= 0;
1878 print_binding_level (lvl
)
1879 struct binding_level
*lvl
;
1883 fprintf (stderr
, " blocks=");
1884 fprintf (stderr
, HOST_PTR_PRINTF
, lvl
->blocks
);
1885 fprintf (stderr
, " n_incomplete=%d parm_flag=%d keep=%d",
1886 list_length (lvl
->incomplete
), lvl
->parm_flag
, lvl
->keep
);
1887 if (lvl
->tag_transparent
)
1888 fprintf (stderr
, " tag-transparent");
1889 if (lvl
->more_cleanups_ok
)
1890 fprintf (stderr
, " more-cleanups-ok");
1891 if (lvl
->have_cleanups
)
1892 fprintf (stderr
, " have-cleanups");
1893 fprintf (stderr
, "\n");
1896 fprintf (stderr
, " names:\t");
1897 /* We can probably fit 3 names to a line? */
1898 for (t
= lvl
->names
; t
; t
= TREE_CHAIN (t
))
1900 if (no_print_functions
&& (TREE_CODE (t
) == FUNCTION_DECL
))
1902 if (no_print_builtins
1903 && (TREE_CODE (t
) == TYPE_DECL
)
1904 && (!strcmp (DECL_SOURCE_FILE (t
),"<built-in>")))
1907 /* Function decls tend to have longer names. */
1908 if (TREE_CODE (t
) == FUNCTION_DECL
)
1915 fprintf (stderr
, "\n\t");
1918 print_node_brief (stderr
, "", t
, 0);
1919 if (t
== error_mark_node
)
1923 fprintf (stderr
, "\n");
1927 fprintf (stderr
, " tags:\t");
1929 for (t
= lvl
->tags
; t
; t
= TREE_CHAIN (t
))
1931 if (TREE_PURPOSE (t
) == NULL_TREE
)
1933 else if (TREE_PURPOSE (t
) == TYPE_IDENTIFIER (TREE_VALUE (t
)))
1940 fprintf (stderr
, "\n\t");
1943 if (TREE_PURPOSE (t
) == NULL_TREE
)
1945 print_node_brief (stderr
, "<unnamed-typedef", TREE_VALUE (t
), 0);
1946 fprintf (stderr
, ">");
1948 else if (TREE_PURPOSE (t
) == TYPE_IDENTIFIER (TREE_VALUE (t
)))
1949 print_node_brief (stderr
, "", TREE_VALUE (t
), 0);
1952 print_node_brief (stderr
, "<typedef", TREE_PURPOSE (t
), 0);
1953 print_node_brief (stderr
, "", TREE_VALUE (t
), 0);
1954 fprintf (stderr
, ">");
1958 fprintf (stderr
, "\n");
1960 if (lvl
->class_shadowed
)
1962 fprintf (stderr
, " class-shadowed:");
1963 for (t
= lvl
->class_shadowed
; t
; t
= TREE_CHAIN (t
))
1965 fprintf (stderr
, " %s ", IDENTIFIER_POINTER (TREE_PURPOSE (t
)));
1967 fprintf (stderr
, "\n");
1969 if (lvl
->type_shadowed
)
1971 fprintf (stderr
, " type-shadowed:");
1972 for (t
= lvl
->type_shadowed
; t
; t
= TREE_CHAIN (t
))
1974 fprintf (stderr
, " %s ", IDENTIFIER_POINTER (TREE_PURPOSE (t
)));
1976 fprintf (stderr
, "\n");
1981 print_other_binding_stack (stack
)
1982 struct binding_level
*stack
;
1984 struct binding_level
*level
;
1985 for (level
= stack
; level
!= global_binding_level
; level
= level
->level_chain
)
1987 fprintf (stderr
, "binding level ");
1988 fprintf (stderr
, HOST_PTR_PRINTF
, level
);
1989 fprintf (stderr
, "\n");
1990 print_binding_level (level
);
1995 print_binding_stack ()
1997 struct binding_level
*b
;
1998 fprintf (stderr
, "current_binding_level=");
1999 fprintf (stderr
, HOST_PTR_PRINTF
, current_binding_level
);
2000 fprintf (stderr
, "\nclass_binding_level=");
2001 fprintf (stderr
, HOST_PTR_PRINTF
, class_binding_level
);
2002 fprintf (stderr
, "\nglobal_binding_level=");
2003 fprintf (stderr
, HOST_PTR_PRINTF
, global_binding_level
);
2004 fprintf (stderr
, "\n");
2005 if (class_binding_level
)
2007 for (b
= class_binding_level
; b
; b
= b
->level_chain
)
2008 if (b
== current_binding_level
)
2011 b
= class_binding_level
;
2013 b
= current_binding_level
;
2016 b
= current_binding_level
;
2017 print_other_binding_stack (b
);
2018 fprintf (stderr
, "global:\n");
2019 print_binding_level (global_binding_level
);
2022 /* Namespace binding access routines: The namespace_bindings field of
2023 the identifier is polymorphic, with three possible values:
2024 NULL_TREE, a list of CPLUS_BINDINGS, or any other tree_node
2025 indicating the BINDING_VALUE of global_namespace. */
2027 /* Check whether the a binding for the name to scope is known.
2028 Assumes that the bindings of the name are already a list
2029 of bindings. Returns the binding found, or NULL_TREE. */
2032 find_binding (name
, scope
)
2036 tree iter
, prev
= NULL_TREE
;
2038 scope
= ORIGINAL_NAMESPACE (scope
);
2040 for (iter
= IDENTIFIER_NAMESPACE_BINDINGS (name
); iter
;
2041 iter
= TREE_CHAIN (iter
))
2043 my_friendly_assert (TREE_CODE (iter
) == CPLUS_BINDING
, 374);
2044 if (BINDING_SCOPE (iter
) == scope
)
2046 /* Move binding found to the front of the list, so
2047 subsequent lookups will find it faster. */
2050 TREE_CHAIN (prev
) = TREE_CHAIN (iter
);
2051 TREE_CHAIN (iter
) = IDENTIFIER_NAMESPACE_BINDINGS (name
);
2052 IDENTIFIER_NAMESPACE_BINDINGS (name
) = iter
;
2061 /* Always returns a binding for name in scope. If the
2062 namespace_bindings is not a list, convert it to one first.
2063 If no binding is found, make a new one. */
2066 binding_for_name (name
, scope
)
2070 tree b
= IDENTIFIER_NAMESPACE_BINDINGS (name
);
2073 scope
= ORIGINAL_NAMESPACE (scope
);
2075 if (b
&& TREE_CODE (b
) != CPLUS_BINDING
)
2077 /* Get rid of optimization for global scope. */
2078 IDENTIFIER_NAMESPACE_BINDINGS (name
) = NULL_TREE
;
2079 BINDING_VALUE (binding_for_name (name
, global_namespace
)) = b
;
2080 b
= IDENTIFIER_NAMESPACE_BINDINGS (name
);
2082 if (b
&& (result
= find_binding (name
, scope
)))
2084 /* Not found, make a new permanent one. */
2085 push_obstacks (&permanent_obstack
, &permanent_obstack
);
2086 result
= make_node (CPLUS_BINDING
);
2087 TREE_CHAIN (result
) = b
;
2088 IDENTIFIER_NAMESPACE_BINDINGS (name
) = result
;
2089 BINDING_SCOPE (result
) = scope
;
2090 BINDING_TYPE (result
) = NULL_TREE
;
2091 BINDING_VALUE (result
) = NULL_TREE
;
2096 /* Return the binding value for name in scope, considering that
2097 namespace_binding may or may not be a list of CPLUS_BINDINGS. */
2100 namespace_binding (name
, scope
)
2104 tree b
= IDENTIFIER_NAMESPACE_BINDINGS (name
);
2107 if (scope
== NULL_TREE
)
2108 scope
= global_namespace
;
2109 if (TREE_CODE (b
) != CPLUS_BINDING
)
2110 return (scope
== global_namespace
) ? b
: NULL_TREE
;
2111 name
= find_binding (name
,scope
);
2112 if (name
== NULL_TREE
)
2114 return BINDING_VALUE (name
);
2117 /* Set the binding value for name in scope. If modifying the binding
2118 of global_namespace is attempted, try to optimize it. */
2121 set_namespace_binding (name
, scope
, val
)
2128 if (scope
== NULL_TREE
)
2129 scope
= global_namespace
;
2131 if (scope
== global_namespace
)
2133 b
= IDENTIFIER_NAMESPACE_BINDINGS (name
);
2134 if (b
== NULL_TREE
|| TREE_CODE (b
) != CPLUS_BINDING
)
2136 IDENTIFIER_NAMESPACE_BINDINGS (name
) = val
;
2140 b
= binding_for_name (name
, scope
);
2141 BINDING_VALUE (b
) = val
;
2144 /* Push into the scope of the NAME namespace. If NAME is NULL_TREE, then we
2145 select a name that is unique to this compilation unit. */
2148 push_namespace (name
)
2153 int implicit_use
= 0;
2155 if (!global_namespace
)
2157 /* This must be ::. */
2158 my_friendly_assert (name
== get_identifier ("::"), 377);
2163 /* The name of anonymous namespace is unique for the translation
2165 if (!anonymous_namespace_name
)
2166 anonymous_namespace_name
= get_file_function_name ('N');
2167 name
= anonymous_namespace_name
;
2168 d
= IDENTIFIER_NAMESPACE_VALUE (name
);
2170 /* Reopening anonymous namespace. */
2174 else if (current_namespace
== global_namespace
2175 && name
== DECL_NAME (std_node
))
2182 /* Check whether this is an extended namespace definition. */
2183 d
= IDENTIFIER_NAMESPACE_VALUE (name
);
2184 if (d
!= NULL_TREE
&& TREE_CODE (d
) == NAMESPACE_DECL
)
2187 if (DECL_NAMESPACE_ALIAS (d
))
2189 cp_error ("namespace alias `%D' not allowed here, assuming `%D'",
2190 d
, DECL_NAMESPACE_ALIAS (d
));
2191 d
= DECL_NAMESPACE_ALIAS (d
);
2198 /* Make a new namespace, binding the name to it. */
2199 d
= build_lang_decl (NAMESPACE_DECL
, name
, void_type_node
);
2200 /* The global namespace is not pushed, and the global binding
2201 level is set elsewhere. */
2206 declare_namespace_level ();
2207 NAMESPACE_LEVEL (d
) = current_binding_level
;
2211 resume_binding_level (NAMESPACE_LEVEL (d
));
2214 do_using_directive (d
);
2215 /* Enter the name space. */
2216 current_namespace
= d
;
2219 /* Pop from the scope of the current namespace. */
2224 if (current_namespace
== global_namespace
)
2226 my_friendly_assert (in_std
>0, 980421);
2230 current_namespace
= CP_DECL_CONTEXT (current_namespace
);
2231 /* The binding level is not popped, as it might be re-opened later. */
2232 suspend_binding_level ();
2235 /* Push into the scope of the namespace NS, even if it is deeply
2236 nested within another namespace. */
2239 push_nested_namespace (ns
)
2242 if (ns
== global_namespace
)
2243 push_to_top_level ();
2246 push_nested_namespace (CP_DECL_CONTEXT (ns
));
2247 push_namespace (DECL_NAME (ns
));
2251 /* Pop back from the scope of the namespace NS, which was previously
2252 entered with push_nested_namespace. */
2255 pop_nested_namespace (ns
)
2258 while (ns
!= global_namespace
)
2261 ns
= CP_DECL_CONTEXT (ns
);
2264 pop_from_top_level ();
2268 /* Subroutines for reverting temporarily to top-level for instantiation
2269 of templates and such. We actually need to clear out the class- and
2270 local-value slots of all identifiers, so that only the global values
2271 are at all visible. Simply setting current_binding_level to the global
2272 scope isn't enough, because more binding levels may be pushed. */
2273 struct saved_scope
*scope_chain
;
2275 /* Mark ST for GC. */
2279 struct stmt_tree
*st
;
2281 ggc_mark_tree (st
->x_last_stmt
);
2282 ggc_mark_tree (st
->x_last_expr_type
);
2285 /* Mark ARG (which is really a struct saved_scope **) for GC. */
2288 mark_saved_scope (arg
)
2291 struct saved_scope
*t
= *(struct saved_scope
**)arg
;
2294 mark_binding_level (&t
->class_bindings
);
2295 ggc_mark_tree (t
->old_bindings
);
2296 ggc_mark_tree (t
->old_namespace
);
2297 ggc_mark_tree (t
->class_name
);
2298 ggc_mark_tree (t
->class_type
);
2299 ggc_mark_tree (t
->access_specifier
);
2300 ggc_mark_tree (t
->function_decl
);
2302 ggc_mark_tree_varray (t
->lang_base
);
2303 ggc_mark_tree (t
->lang_name
);
2304 ggc_mark_tree (t
->x_function_parms
);
2305 ggc_mark_tree (t
->template_parms
);
2306 ggc_mark_tree (t
->x_previous_class_type
);
2307 ggc_mark_tree (t
->x_previous_class_values
);
2308 ggc_mark_tree (t
->x_saved_tree
);
2310 mark_stmt_tree (&t
->x_stmt_tree
);
2311 mark_binding_level (&t
->bindings
);
2317 store_bindings (names
, old_bindings
)
2318 tree names
, old_bindings
;
2321 for (t
= names
; t
; t
= TREE_CHAIN (t
))
2323 tree binding
, t1
, id
;
2325 if (TREE_CODE (t
) == TREE_LIST
)
2326 id
= TREE_PURPOSE (t
);
2331 /* Note that we may have an IDENTIFIER_CLASS_VALUE even when
2332 we have no IDENTIFIER_BINDING if we have left the class
2333 scope, but cached the class-level declarations. */
2334 || !(IDENTIFIER_BINDING (id
) || IDENTIFIER_CLASS_VALUE (id
)))
2337 for (t1
= old_bindings
; t1
; t1
= TREE_CHAIN (t1
))
2338 if (TREE_VEC_ELT (t1
, 0) == id
)
2341 binding
= make_tree_vec (4);
2345 my_friendly_assert (TREE_CODE (id
) == IDENTIFIER_NODE
, 135);
2346 TREE_VEC_ELT (binding
, 0) = id
;
2347 TREE_VEC_ELT (binding
, 1) = REAL_IDENTIFIER_TYPE_VALUE (id
);
2348 TREE_VEC_ELT (binding
, 2) = IDENTIFIER_BINDING (id
);
2349 TREE_VEC_ELT (binding
, 3) = IDENTIFIER_CLASS_VALUE (id
);
2350 IDENTIFIER_BINDING (id
) = NULL_TREE
;
2351 IDENTIFIER_CLASS_VALUE (id
) = NULL_TREE
;
2353 TREE_CHAIN (binding
) = old_bindings
;
2354 old_bindings
= binding
;
2358 return old_bindings
;
2362 maybe_push_to_top_level (pseudo
)
2365 struct saved_scope
*s
;
2366 struct binding_level
*b
;
2370 s
= (struct saved_scope
*) xcalloc (1, sizeof (struct saved_scope
));
2372 b
= scope_chain
? current_binding_level
: 0;
2374 /* If we're in the middle of some function, save our state. */
2375 if (current_function
)
2378 push_function_context_to (NULL_TREE
);
2383 old_bindings
= NULL_TREE
;
2384 if (scope_chain
&& previous_class_type
)
2385 old_bindings
= store_bindings (previous_class_values
, old_bindings
);
2387 /* Have to include global_binding_level, because class-level decls
2388 aren't listed anywhere useful. */
2389 for (; b
; b
= b
->level_chain
)
2393 /* Template IDs are inserted into the global level. If they were
2394 inserted into namespace level, finish_file wouldn't find them
2395 when doing pending instantiations. Therefore, don't stop at
2396 namespace level, but continue until :: . */
2397 if (b
== global_binding_level
|| (pseudo
&& b
->pseudo_global
))
2400 old_bindings
= store_bindings (b
->names
, old_bindings
);
2401 /* We also need to check class_shadowed to save class-level type
2402 bindings, since pushclass doesn't fill in b->names. */
2403 if (b
->parm_flag
== 2)
2404 old_bindings
= store_bindings (b
->class_shadowed
, old_bindings
);
2406 /* Unwind type-value slots back to top level. */
2407 for (t
= b
->type_shadowed
; t
; t
= TREE_CHAIN (t
))
2408 SET_IDENTIFIER_TYPE_VALUE (TREE_PURPOSE (t
), TREE_VALUE (t
));
2410 s
->prev
= scope_chain
;
2411 s
->old_bindings
= old_bindings
;
2413 s
->need_pop_function_context
= need_pop
;
2414 s
->function_decl
= current_function_decl
;
2417 current_function_decl
= NULL_TREE
;
2418 VARRAY_TREE_INIT (current_lang_base
, 10, "current_lang_base");
2419 current_lang_stack
= &VARRAY_TREE (current_lang_base
, 0);
2420 current_lang_name
= lang_name_cplusplus
;
2421 strict_prototype
= strict_prototypes_lang_cplusplus
;
2422 current_namespace
= global_namespace
;
2424 push_obstacks (&permanent_obstack
, &permanent_obstack
);
2428 push_to_top_level ()
2430 maybe_push_to_top_level (0);
2434 pop_from_top_level ()
2436 struct saved_scope
*s
= scope_chain
;
2439 /* Clear out class-level bindings cache. */
2440 if (previous_class_type
)
2441 invalidate_class_lookup_cache ();
2445 VARRAY_FREE (current_lang_base
);
2447 scope_chain
= s
->prev
;
2448 for (t
= s
->old_bindings
; t
; t
= TREE_CHAIN (t
))
2450 tree id
= TREE_VEC_ELT (t
, 0);
2453 SET_IDENTIFIER_TYPE_VALUE (id
, TREE_VEC_ELT (t
, 1));
2454 IDENTIFIER_BINDING (id
) = TREE_VEC_ELT (t
, 2);
2455 IDENTIFIER_CLASS_VALUE (id
) = TREE_VEC_ELT (t
, 3);
2459 if (current_lang_name
== lang_name_cplusplus
)
2460 strict_prototype
= strict_prototypes_lang_cplusplus
;
2461 else if (current_lang_name
== lang_name_c
)
2462 strict_prototype
= strict_prototypes_lang_c
;
2464 /* If we were in the middle of compiling a function, restore our
2466 if (s
->need_pop_function_context
)
2467 pop_function_context_from (NULL_TREE
);
2468 current_function_decl
= s
->function_decl
;
2473 /* Push a definition of struct, union or enum tag "name".
2474 into binding_level "b". "type" should be the type node,
2475 We assume that the tag "name" is not already defined.
2477 Note that the definition may really be just a forward reference.
2478 In that case, the TYPE_SIZE will be a NULL_TREE.
2480 C++ gratuitously puts all these tags in the name space. */
2482 /* When setting the IDENTIFIER_TYPE_VALUE field of an identifier ID,
2483 record the shadowed value for this binding contour. TYPE is
2484 the type that ID maps to. */
2487 set_identifier_type_value_with_scope (id
, type
, b
)
2490 struct binding_level
*b
;
2492 if (!b
->namespace_p
)
2494 /* Shadow the marker, not the real thing, so that the marker
2495 gets restored later. */
2496 tree old_type_value
= REAL_IDENTIFIER_TYPE_VALUE (id
);
2498 = tree_cons (id
, old_type_value
, b
->type_shadowed
);
2502 tree binding
= binding_for_name (id
, current_namespace
);
2503 BINDING_TYPE (binding
) = type
;
2504 /* Store marker instead of real type. */
2505 type
= global_type_node
;
2507 SET_IDENTIFIER_TYPE_VALUE (id
, type
);
2510 /* As set_identifier_type_value_with_scope, but using current_binding_level. */
2513 set_identifier_type_value (id
, type
)
2517 set_identifier_type_value_with_scope (id
, type
, current_binding_level
);
2520 /* Return the type associated with id. */
2523 identifier_type_value (id
)
2526 /* There is no type with that name, anywhere. */
2527 if (REAL_IDENTIFIER_TYPE_VALUE (id
) == NULL_TREE
)
2529 /* This is not the type marker, but the real thing. */
2530 if (REAL_IDENTIFIER_TYPE_VALUE (id
) != global_type_node
)
2531 return REAL_IDENTIFIER_TYPE_VALUE (id
);
2532 /* Have to search for it. It must be on the global level, now.
2533 Ask lookup_name not to return non-types. */
2534 id
= lookup_name_real (id
, 2, 1, 0);
2536 return TREE_TYPE (id
);
2540 /* Pop off extraneous binding levels left over due to syntax errors.
2542 We don't pop past namespaces, as they might be valid. */
2547 #ifdef DEBUG_CP_BINDING_LEVELS
2548 fprintf (stderr
, "XXX entering pop_everything ()\n");
2550 while (!toplevel_bindings_p ())
2552 if (current_binding_level
->parm_flag
== 2)
2553 pop_nested_class ();
2557 #ifdef DEBUG_CP_BINDING_LEVELS
2558 fprintf (stderr
, "XXX leaving pop_everything ()\n");
2562 /* The type TYPE is being declared. If it is a class template, or a
2563 specialization of a class template, do any processing required and
2564 perform error-checking. If IS_FRIEND is non-zero, this TYPE is
2565 being declared a friend. B is the binding level at which this TYPE
2568 Returns the TYPE_DECL for TYPE, which may have been altered by this
2572 maybe_process_template_type_declaration (type
, globalize
, b
)
2575 struct binding_level
* b
;
2577 tree decl
= TYPE_NAME (type
);
2579 if (processing_template_parmlist
)
2580 /* You can't declare a new template type in a template parameter
2581 list. But, you can declare a non-template type:
2583 template <class A*> struct S;
2585 is a forward-declaration of `A'. */
2589 maybe_check_template_type (type
);
2591 my_friendly_assert (IS_AGGR_TYPE (type
)
2592 || TREE_CODE (type
) == ENUMERAL_TYPE
, 0);
2595 if (processing_template_decl
)
2597 /* This may change after the call to
2598 push_template_decl_real, but we want the original value. */
2599 tree name
= DECL_NAME (decl
);
2601 decl
= push_template_decl_real (decl
, globalize
);
2602 /* If the current binding level is the binding level for the
2603 template parameters (see the comment in
2604 begin_template_parm_list) and the enclosing level is a class
2605 scope, and we're not looking at a friend, push the
2606 declaration of the member class into the class scope. In the
2607 friend case, push_template_decl will already have put the
2608 friend into global scope, if appropriate. */
2609 if (TREE_CODE (type
) != ENUMERAL_TYPE
2610 && !globalize
&& b
->pseudo_global
2611 && b
->level_chain
->parm_flag
== 2)
2613 finish_member_declaration (CLASSTYPE_TI_TEMPLATE (type
));
2614 /* Put this tag on the list of tags for the class, since
2615 that won't happen below because B is not the class
2616 binding level, but is instead the pseudo-global level. */
2617 b
->level_chain
->tags
=
2618 tree_cons (name
, type
, b
->level_chain
->tags
);
2619 if (TYPE_SIZE (current_class_type
) == NULL_TREE
)
2620 CLASSTYPE_TAGS (current_class_type
) = b
->level_chain
->tags
;
2628 /* In C++, you don't have to write `struct S' to refer to `S'; you
2629 can just use `S'. We accomplish this by creating a TYPE_DECL as
2630 if the user had written `typedef struct S S'. Create and return
2631 the TYPE_DECL for TYPE. */
2634 create_implicit_typedef (name
, type
)
2640 decl
= build_decl (TYPE_DECL
, name
, type
);
2641 SET_DECL_ARTIFICIAL (decl
);
2642 /* There are other implicit type declarations, like the one *within*
2643 a class that allows you to write `S::S'. We must distinguish
2645 SET_DECL_IMPLICIT_TYPEDEF_P (decl
);
2646 TYPE_NAME (type
) = decl
;
2651 /* Push a tag name NAME for struct/class/union/enum type TYPE.
2652 Normally put it into the inner-most non-tag-transparent scope,
2653 but if GLOBALIZE is true, put it in the inner-most non-class scope.
2654 The latter is needed for implicit declarations. */
2657 pushtag (name
, type
, globalize
)
2661 register struct binding_level
*b
;
2663 b
= current_binding_level
;
2664 while (b
->tag_transparent
2665 || (globalize
&& b
->parm_flag
== 2))
2668 b
->tags
= tree_cons (name
, type
, b
->tags
);
2672 /* Do C++ gratuitous typedefing. */
2673 if (IDENTIFIER_TYPE_VALUE (name
) != type
)
2675 register tree d
= NULL_TREE
;
2677 tree context
= TYPE_CONTEXT (type
);
2681 tree cs
= current_scope ();
2685 else if (cs
!= NULL_TREE
2686 && TREE_CODE_CLASS (TREE_CODE (cs
)) == 't')
2687 /* When declaring a friend class of a local class, we want
2688 to inject the newly named class into the scope
2689 containing the local class, not the namespace scope. */
2690 context
= hack_decl_function_context (get_type_decl (cs
));
2693 context
= current_namespace
;
2695 if ((b
->pseudo_global
&& b
->level_chain
->parm_flag
== 2)
2696 || b
->parm_flag
== 2)
2699 if (current_lang_name
== lang_name_java
)
2700 TYPE_FOR_JAVA (type
) = 1;
2702 d
= create_implicit_typedef (name
, type
);
2703 DECL_CONTEXT (d
) = FROB_CONTEXT (context
);
2705 set_identifier_type_value_with_scope (name
, type
, b
);
2707 d
= maybe_process_template_type_declaration (type
,
2710 if (b
->parm_flag
== 2)
2712 if (!PROCESSING_REAL_TEMPLATE_DECL_P ())
2713 /* Put this TYPE_DECL on the TYPE_FIELDS list for the
2714 class. But if it's a member template class, we
2715 want the TEMPLATE_DECL, not the TYPE_DECL, so this
2717 finish_member_declaration (d
);
2719 pushdecl_class_level (d
);
2722 d
= pushdecl_with_scope (d
, b
);
2724 if (ANON_AGGRNAME_P (name
))
2725 DECL_IGNORED_P (d
) = 1;
2727 TYPE_CONTEXT (type
) = DECL_CONTEXT (d
);
2728 DECL_ASSEMBLER_NAME (d
) = DECL_NAME (d
);
2729 if (!uses_template_parms (type
))
2730 DECL_ASSEMBLER_NAME (d
)
2731 = get_identifier (build_overload_name (type
, 1, 1));
2733 if (b
->parm_flag
== 2)
2735 if (TYPE_SIZE (current_class_type
) == NULL_TREE
)
2736 CLASSTYPE_TAGS (current_class_type
) = b
->tags
;
2740 if (TREE_CODE (TYPE_NAME (type
)) == TYPE_DECL
)
2741 /* Use the canonical TYPE_DECL for this node. */
2742 TYPE_STUB_DECL (type
) = TYPE_NAME (type
);
2745 /* Create a fake NULL-named TYPE_DECL node whose TREE_TYPE
2746 will be the tagged type we just added to the current
2747 binding level. This fake NULL-named TYPE_DECL node helps
2748 dwarfout.c to know when it needs to output a
2749 representation of a tagged type, and it also gives us a
2750 convenient place to record the "scope start" address for
2753 tree d
= build_decl (TYPE_DECL
, NULL_TREE
, type
);
2754 TYPE_STUB_DECL (type
) = pushdecl_with_scope (d
, b
);
2758 /* Counter used to create anonymous type names. */
2760 static int anon_cnt
= 0;
2762 /* Return an IDENTIFIER which can be used as a name for
2763 anonymous structs and unions. */
2770 sprintf (buf
, ANON_AGGRNAME_FORMAT
, anon_cnt
++);
2771 return get_identifier (buf
);
2774 /* Clear the TREE_PURPOSE slot of tags which have anonymous typenames.
2775 This keeps dbxout from getting confused. */
2780 register struct binding_level
*b
;
2782 static int last_cnt
= 0;
2784 /* Fast out if no new anon names were declared. */
2785 if (last_cnt
== anon_cnt
)
2788 b
= current_binding_level
;
2789 while (b
->tag_transparent
)
2794 /* A NULL purpose means we have already processed all tags
2795 from here to the end of the list. */
2796 if (TREE_PURPOSE (tags
) == NULL_TREE
)
2798 if (ANON_AGGRNAME_P (TREE_PURPOSE (tags
)))
2799 TREE_PURPOSE (tags
) = NULL_TREE
;
2800 tags
= TREE_CHAIN (tags
);
2802 last_cnt
= anon_cnt
;
2805 /* Subroutine of duplicate_decls: return truthvalue of whether
2806 or not types of these decls match.
2808 For C++, we must compare the parameter list so that `int' can match
2809 `int&' in a parameter position, but `int&' is not confused with
2813 decls_match (newdecl
, olddecl
)
2814 tree newdecl
, olddecl
;
2818 if (newdecl
== olddecl
)
2821 if (TREE_CODE (newdecl
) != TREE_CODE (olddecl
))
2822 /* If the two DECLs are not even the same kind of thing, we're not
2823 interested in their types. */
2826 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
2828 tree f1
= TREE_TYPE (newdecl
);
2829 tree f2
= TREE_TYPE (olddecl
);
2830 tree p1
= TYPE_ARG_TYPES (f1
);
2831 tree p2
= TYPE_ARG_TYPES (f2
);
2833 if (DECL_REAL_CONTEXT (newdecl
) != DECL_REAL_CONTEXT (olddecl
)
2834 && ! (DECL_LANGUAGE (newdecl
) == lang_c
2835 && DECL_LANGUAGE (olddecl
) == lang_c
))
2838 /* When we parse a static member function definition,
2839 we put together a FUNCTION_DECL which thinks its type
2840 is METHOD_TYPE. Change that to FUNCTION_TYPE, and
2842 if (TREE_CODE (f1
) == METHOD_TYPE
&& DECL_STATIC_FUNCTION_P (olddecl
))
2843 revert_static_member_fn (&newdecl
, &f1
, &p1
);
2844 else if (TREE_CODE (f2
) == METHOD_TYPE
2845 && DECL_STATIC_FUNCTION_P (newdecl
))
2846 revert_static_member_fn (&olddecl
, &f2
, &p2
);
2848 /* Here we must take care of the case where new default
2849 parameters are specified. Also, warn if an old
2850 declaration becomes ambiguous because default
2851 parameters may cause the two to be ambiguous. */
2852 if (TREE_CODE (f1
) != TREE_CODE (f2
))
2854 if (TREE_CODE (f1
) == OFFSET_TYPE
)
2855 cp_compiler_error ("`%D' redeclared as member function", newdecl
);
2857 cp_compiler_error ("`%D' redeclared as non-member function", newdecl
);
2861 if (same_type_p (TREE_TYPE (f1
), TREE_TYPE (f2
)))
2863 if (! strict_prototypes_lang_c
&& DECL_LANGUAGE (olddecl
) == lang_c
2866 types_match
= self_promoting_args_p (p1
);
2867 if (p1
== void_list_node
)
2868 TREE_TYPE (newdecl
) = TREE_TYPE (olddecl
);
2870 else if (!strict_prototypes_lang_c
&& DECL_LANGUAGE (olddecl
)==lang_c
2871 && DECL_LANGUAGE (newdecl
) == lang_c
&& p1
== NULL_TREE
)
2873 types_match
= self_promoting_args_p (p2
);
2874 TREE_TYPE (newdecl
) = TREE_TYPE (olddecl
);
2877 types_match
= compparms (p1
, p2
);
2882 else if (TREE_CODE (newdecl
) == TEMPLATE_DECL
)
2884 if (!comp_template_parms (DECL_TEMPLATE_PARMS (newdecl
),
2885 DECL_TEMPLATE_PARMS (olddecl
)))
2888 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) == TYPE_DECL
)
2891 types_match
= decls_match (DECL_TEMPLATE_RESULT (olddecl
),
2892 DECL_TEMPLATE_RESULT (newdecl
));
2896 if (TREE_TYPE (newdecl
) == error_mark_node
)
2897 types_match
= TREE_TYPE (olddecl
) == error_mark_node
;
2898 else if (TREE_TYPE (olddecl
) == NULL_TREE
)
2899 types_match
= TREE_TYPE (newdecl
) == NULL_TREE
;
2900 else if (TREE_TYPE (newdecl
) == NULL_TREE
)
2903 types_match
= comptypes (TREE_TYPE (newdecl
),
2904 TREE_TYPE (olddecl
),
2905 COMPARE_REDECLARATION
);
2911 /* If NEWDECL is `static' and an `extern' was seen previously,
2912 warn about it. OLDDECL is the previous declaration.
2914 Note that this does not apply to the C++ case of declaring
2915 a variable `extern const' and then later `const'.
2917 Don't complain about built-in functions, since they are beyond
2918 the user's control. */
2921 warn_extern_redeclared_static (newdecl
, olddecl
)
2922 tree newdecl
, olddecl
;
2924 static const char *explicit_extern_static_warning
2925 = "`%D' was declared `extern' and later `static'";
2926 static const char *implicit_extern_static_warning
2927 = "`%D' was declared implicitly `extern' and later `static'";
2931 if (TREE_CODE (newdecl
) == TYPE_DECL
)
2934 /* Don't get confused by static member functions; that's a different
2936 if (TREE_CODE (newdecl
) == FUNCTION_DECL
2937 && DECL_STATIC_FUNCTION_P (newdecl
))
2940 /* If the old declaration was `static', or the new one isn't, then
2941 then everything is OK. */
2942 if (DECL_THIS_STATIC (olddecl
) || !DECL_THIS_STATIC (newdecl
))
2945 /* It's OK to declare a builtin function as `static'. */
2946 if (TREE_CODE (olddecl
) == FUNCTION_DECL
2947 && DECL_ARTIFICIAL (olddecl
))
2950 name
= DECL_ASSEMBLER_NAME (newdecl
);
2951 cp_pedwarn (IDENTIFIER_IMPLICIT_DECL (name
)
2952 ? implicit_extern_static_warning
2953 : explicit_extern_static_warning
, newdecl
);
2954 cp_pedwarn_at ("previous declaration of `%D'", olddecl
);
2957 /* Handle when a new declaration NEWDECL has the same name as an old
2958 one OLDDECL in the same binding contour. Prints an error message
2961 If safely possible, alter OLDDECL to look like NEWDECL, and return 1.
2962 Otherwise, return 0. */
2965 duplicate_decls (newdecl
, olddecl
)
2966 tree newdecl
, olddecl
;
2968 unsigned olddecl_uid
= DECL_UID (olddecl
);
2969 int olddecl_friend
= 0, types_match
= 0;
2970 int new_defines_function
= 0;
2972 if (newdecl
== olddecl
)
2975 types_match
= decls_match (newdecl
, olddecl
);
2977 /* If either the type of the new decl or the type of the old decl is an
2978 error_mark_node, then that implies that we have already issued an
2979 error (earlier) for some bogus type specification, and in that case,
2980 it is rather pointless to harass the user with yet more error message
2981 about the same declaration, so just pretend the types match here. */
2982 if (TREE_TYPE (newdecl
) == error_mark_node
2983 || TREE_TYPE (olddecl
) == error_mark_node
)
2986 /* Check for redeclaration and other discrepancies. */
2987 if (TREE_CODE (olddecl
) == FUNCTION_DECL
2988 && DECL_ARTIFICIAL (olddecl
))
2990 if (TREE_CODE (newdecl
) != FUNCTION_DECL
)
2992 /* If you declare a built-in or predefined function name as static,
2993 the old definition is overridden, but optionally warn this was a
2994 bad choice of name. */
2995 if (! TREE_PUBLIC (newdecl
))
2998 cp_warning ("shadowing %s function `%#D'",
2999 DECL_BUILT_IN (olddecl
) ? "built-in" : "library",
3001 /* Discard the old built-in function. */
3004 /* If the built-in is not ansi, then programs can override
3005 it even globally without an error. */
3006 else if (! DECL_BUILT_IN (olddecl
))
3007 cp_warning ("library function `%#D' redeclared as non-function `%#D'",
3011 cp_error ("declaration of `%#D'", newdecl
);
3012 cp_error ("conflicts with built-in declaration `%#D'",
3017 else if (!types_match
)
3019 if ((DECL_LANGUAGE (newdecl
) == lang_c
3020 && DECL_LANGUAGE (olddecl
) == lang_c
)
3021 || compparms (TYPE_ARG_TYPES (TREE_TYPE (newdecl
)),
3022 TYPE_ARG_TYPES (TREE_TYPE (olddecl
))))
3024 /* A near match; override the builtin. */
3026 if (TREE_PUBLIC (newdecl
))
3028 cp_warning ("new declaration `%#D'", newdecl
);
3029 cp_warning ("ambiguates built-in declaration `%#D'",
3032 else if (warn_shadow
)
3033 cp_warning ("shadowing %s function `%#D'",
3034 DECL_BUILT_IN (olddecl
) ? "built-in" : "library",
3038 /* Discard the old built-in function. */
3042 if (DECL_THIS_STATIC (newdecl
) && !DECL_THIS_STATIC (olddecl
))
3044 /* If a builtin function is redeclared as `static', merge
3045 the declarations, but make the original one static. */
3046 DECL_THIS_STATIC (olddecl
) = 1;
3047 TREE_PUBLIC (olddecl
) = 0;
3049 /* Make the olddeclaration consistent with the new one so that
3050 all remnants of the builtin-ness of this function will be
3052 DECL_LANGUAGE (olddecl
) = DECL_LANGUAGE (newdecl
);
3053 DECL_RTL (olddecl
) = DECL_RTL (newdecl
);
3054 DECL_ASSEMBLER_NAME (olddecl
) = DECL_ASSEMBLER_NAME (newdecl
);
3055 SET_IDENTIFIER_GLOBAL_VALUE (DECL_ASSEMBLER_NAME (newdecl
),
3059 else if (TREE_CODE (olddecl
) != TREE_CODE (newdecl
))
3061 if ((TREE_CODE (olddecl
) == TYPE_DECL
&& DECL_ARTIFICIAL (olddecl
)
3062 && TREE_CODE (newdecl
) != TYPE_DECL
3063 && ! (TREE_CODE (newdecl
) == TEMPLATE_DECL
3064 && TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) == TYPE_DECL
))
3065 || (TREE_CODE (newdecl
) == TYPE_DECL
&& DECL_ARTIFICIAL (newdecl
)
3066 && TREE_CODE (olddecl
) != TYPE_DECL
3067 && ! (TREE_CODE (olddecl
) == TEMPLATE_DECL
3068 && (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl
))
3071 /* We do nothing special here, because C++ does such nasty
3072 things with TYPE_DECLs. Instead, just let the TYPE_DECL
3073 get shadowed, and know that if we need to find a TYPE_DECL
3074 for a given name, we can look in the IDENTIFIER_TYPE_VALUE
3075 slot of the identifier. */
3079 if ((TREE_CODE (newdecl
) == FUNCTION_DECL
3080 && DECL_FUNCTION_TEMPLATE_P (olddecl
))
3081 || (TREE_CODE (olddecl
) == FUNCTION_DECL
3082 && DECL_FUNCTION_TEMPLATE_P (newdecl
)))
3085 cp_error ("`%#D' redeclared as different kind of symbol", newdecl
);
3086 if (TREE_CODE (olddecl
) == TREE_LIST
)
3087 olddecl
= TREE_VALUE (olddecl
);
3088 cp_error_at ("previous declaration of `%#D'", olddecl
);
3090 /* New decl is completely inconsistent with the old one =>
3091 tell caller to replace the old one. */
3095 else if (!types_match
)
3097 if (DECL_REAL_CONTEXT (newdecl
) != DECL_REAL_CONTEXT (olddecl
))
3098 /* These are certainly not duplicate declarations; they're
3099 from different scopes. */
3102 if (TREE_CODE (newdecl
) == TEMPLATE_DECL
)
3104 /* The name of a class template may not be declared to refer to
3105 any other template, class, function, object, namespace, value,
3106 or type in the same scope. */
3107 if (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl
)) == TYPE_DECL
3108 || TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) == TYPE_DECL
)
3110 cp_error ("declaration of template `%#D'", newdecl
);
3111 cp_error_at ("conflicts with previous declaration `%#D'",
3114 else if (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl
)) == FUNCTION_DECL
3115 && TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) == FUNCTION_DECL
3116 && compparms (TYPE_ARG_TYPES (TREE_TYPE (DECL_TEMPLATE_RESULT (olddecl
))),
3117 TYPE_ARG_TYPES (TREE_TYPE (DECL_TEMPLATE_RESULT (newdecl
))))
3118 && comp_template_parms (DECL_TEMPLATE_PARMS (newdecl
),
3119 DECL_TEMPLATE_PARMS (olddecl
)))
3121 cp_error ("new declaration `%#D'", newdecl
);
3122 cp_error_at ("ambiguates old declaration `%#D'", olddecl
);
3126 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
3128 if (DECL_LANGUAGE (newdecl
) == lang_c
3129 && DECL_LANGUAGE (olddecl
) == lang_c
)
3131 cp_error ("declaration of C function `%#D' conflicts with",
3133 cp_error_at ("previous declaration `%#D' here", olddecl
);
3135 else if (compparms (TYPE_ARG_TYPES (TREE_TYPE (newdecl
)),
3136 TYPE_ARG_TYPES (TREE_TYPE (olddecl
))))
3138 cp_error ("new declaration `%#D'", newdecl
);
3139 cp_error_at ("ambiguates old declaration `%#D'", olddecl
);
3145 /* Already complained about this, so don't do so again. */
3146 else if (current_class_type
== NULL_TREE
3147 || IDENTIFIER_ERROR_LOCUS (DECL_ASSEMBLER_NAME (newdecl
)) != current_class_type
)
3149 cp_error ("conflicting types for `%#D'", newdecl
);
3150 cp_error_at ("previous declaration as `%#D'", olddecl
);
3153 else if (TREE_CODE (newdecl
) == FUNCTION_DECL
3154 && ((DECL_TEMPLATE_SPECIALIZATION (olddecl
)
3155 && (!DECL_TEMPLATE_INFO (newdecl
)
3156 || (DECL_TI_TEMPLATE (newdecl
)
3157 != DECL_TI_TEMPLATE (olddecl
))))
3158 || (DECL_TEMPLATE_SPECIALIZATION (newdecl
)
3159 && (!DECL_TEMPLATE_INFO (olddecl
)
3160 || (DECL_TI_TEMPLATE (olddecl
)
3161 != DECL_TI_TEMPLATE (newdecl
))))))
3162 /* It's OK to have a template specialization and a non-template
3163 with the same type, or to have specializations of two
3164 different templates with the same type. Note that if one is a
3165 specialization, and the other is an instantiation of the same
3166 template, that we do not exit at this point. That situation
3167 can occur if we instantiate a template class, and then
3168 specialize one of its methods. This situation is legal, but
3169 the declarations must be merged in the usual way. */
3171 else if (TREE_CODE (newdecl
) == FUNCTION_DECL
3172 && ((DECL_TEMPLATE_INSTANTIATION (olddecl
)
3173 && !DECL_USE_TEMPLATE (newdecl
))
3174 || (DECL_TEMPLATE_INSTANTIATION (newdecl
)
3175 && !DECL_USE_TEMPLATE (olddecl
))))
3176 /* One of the declarations is a template instantiation, and the
3177 other is not a template at all. That's OK. */
3179 else if (TREE_CODE (newdecl
) == NAMESPACE_DECL
3180 && DECL_NAMESPACE_ALIAS (newdecl
)
3181 && DECL_NAMESPACE_ALIAS (newdecl
) == DECL_NAMESPACE_ALIAS (olddecl
))
3182 /* Redeclaration of namespace alias, ignore it. */
3186 const char *errmsg
= redeclaration_error_message (newdecl
, olddecl
);
3189 cp_error (errmsg
, newdecl
);
3190 if (DECL_NAME (olddecl
) != NULL_TREE
)
3191 cp_error_at ((DECL_INITIAL (olddecl
)
3192 && namespace_bindings_p ())
3193 ? "`%#D' previously defined here"
3194 : "`%#D' previously declared here", olddecl
);
3196 else if (TREE_CODE (olddecl
) == FUNCTION_DECL
3197 && DECL_INITIAL (olddecl
) != NULL_TREE
3198 && TYPE_ARG_TYPES (TREE_TYPE (olddecl
)) == NULL_TREE
3199 && TYPE_ARG_TYPES (TREE_TYPE (newdecl
)) != NULL_TREE
)
3201 /* Prototype decl follows defn w/o prototype. */
3202 cp_warning_at ("prototype for `%#D'", newdecl
);
3203 cp_warning_at ("follows non-prototype definition here", olddecl
);
3205 else if (TREE_CODE (olddecl
) == FUNCTION_DECL
3206 && DECL_LANGUAGE (newdecl
) != DECL_LANGUAGE (olddecl
))
3208 /* extern "C" int foo ();
3209 int foo () { bar (); }
3211 if (current_lang_stack
3212 == &VARRAY_TREE (current_lang_base
, 0))
3213 DECL_LANGUAGE (newdecl
) = DECL_LANGUAGE (olddecl
);
3216 cp_error_at ("previous declaration of `%#D' with %L linkage",
3217 olddecl
, DECL_LANGUAGE (olddecl
));
3218 cp_error ("conflicts with new declaration with %L linkage",
3219 DECL_LANGUAGE (newdecl
));
3223 if (DECL_LANG_SPECIFIC (olddecl
) && DECL_USE_TEMPLATE (olddecl
))
3225 else if (TREE_CODE (olddecl
) == FUNCTION_DECL
)
3227 tree t1
= TYPE_ARG_TYPES (TREE_TYPE (olddecl
));
3228 tree t2
= TYPE_ARG_TYPES (TREE_TYPE (newdecl
));
3231 if (TREE_CODE (TREE_TYPE (newdecl
)) == METHOD_TYPE
)
3232 t1
= TREE_CHAIN (t1
), t2
= TREE_CHAIN (t2
);
3234 for (; t1
&& t1
!= void_list_node
;
3235 t1
= TREE_CHAIN (t1
), t2
= TREE_CHAIN (t2
), i
++)
3236 if (TREE_PURPOSE (t1
) && TREE_PURPOSE (t2
))
3238 if (1 == simple_cst_equal (TREE_PURPOSE (t1
),
3243 cp_pedwarn ("default argument given for parameter %d of `%#D'",
3245 cp_pedwarn_at ("after previous specification in `%#D'",
3251 cp_error ("default argument given for parameter %d of `%#D'",
3253 cp_error_at ("after previous specification in `%#D'",
3258 if (DECL_THIS_INLINE (newdecl
) && ! DECL_THIS_INLINE (olddecl
)
3259 && TREE_ADDRESSABLE (olddecl
) && warn_inline
)
3261 cp_warning ("`%#D' was used before it was declared inline",
3263 cp_warning_at ("previous non-inline declaration here",
3269 /* If new decl is `static' and an `extern' was seen previously,
3271 warn_extern_redeclared_static (newdecl
, olddecl
);
3273 /* We have committed to returning 1 at this point. */
3274 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
3276 /* Now that functions must hold information normally held
3277 by field decls, there is extra work to do so that
3278 declaration information does not get destroyed during
3280 if (DECL_VINDEX (olddecl
))
3281 DECL_VINDEX (newdecl
) = DECL_VINDEX (olddecl
);
3282 if (DECL_CONTEXT (olddecl
))
3283 DECL_CONTEXT (newdecl
) = DECL_CONTEXT (olddecl
);
3284 if (DECL_CLASS_CONTEXT (olddecl
))
3285 DECL_CLASS_CONTEXT (newdecl
) = DECL_CLASS_CONTEXT (olddecl
);
3286 if (DECL_PENDING_INLINE_INFO (newdecl
) == (struct pending_inline
*)0)
3287 DECL_PENDING_INLINE_INFO (newdecl
) = DECL_PENDING_INLINE_INFO (olddecl
);
3288 DECL_STATIC_CONSTRUCTOR (newdecl
) |= DECL_STATIC_CONSTRUCTOR (olddecl
);
3289 DECL_STATIC_DESTRUCTOR (newdecl
) |= DECL_STATIC_DESTRUCTOR (olddecl
);
3290 DECL_ABSTRACT_VIRTUAL_P (newdecl
) |= DECL_ABSTRACT_VIRTUAL_P (olddecl
);
3291 DECL_VIRTUAL_P (newdecl
) |= DECL_VIRTUAL_P (olddecl
);
3292 DECL_NEEDS_FINAL_OVERRIDER_P (newdecl
) |= DECL_NEEDS_FINAL_OVERRIDER_P (olddecl
);
3293 DECL_THIS_STATIC (newdecl
) |= DECL_THIS_STATIC (olddecl
);
3294 new_defines_function
= DECL_INITIAL (newdecl
) != NULL_TREE
;
3296 /* Optionally warn about more than one declaration for the same
3297 name, but don't warn about a function declaration followed by a
3299 if (warn_redundant_decls
&& ! DECL_ARTIFICIAL (olddecl
)
3300 && !(new_defines_function
&& DECL_INITIAL (olddecl
) == NULL_TREE
)
3301 /* Don't warn about extern decl followed by definition. */
3302 && !(DECL_EXTERNAL (olddecl
) && ! DECL_EXTERNAL (newdecl
))
3303 /* Don't warn about friends, let add_friend take care of it. */
3304 && ! DECL_FRIEND_P (newdecl
))
3306 cp_warning ("redundant redeclaration of `%D' in same scope", newdecl
);
3307 cp_warning_at ("previous declaration of `%D'", olddecl
);
3311 /* Deal with C++: must preserve virtual function table size. */
3312 if (TREE_CODE (olddecl
) == TYPE_DECL
)
3314 register tree newtype
= TREE_TYPE (newdecl
);
3315 register tree oldtype
= TREE_TYPE (olddecl
);
3317 if (newtype
!= error_mark_node
&& oldtype
!= error_mark_node
3318 && TYPE_LANG_SPECIFIC (newtype
) && TYPE_LANG_SPECIFIC (oldtype
))
3320 CLASSTYPE_VSIZE (newtype
) = CLASSTYPE_VSIZE (oldtype
);
3321 CLASSTYPE_FRIEND_CLASSES (newtype
)
3322 = CLASSTYPE_FRIEND_CLASSES (oldtype
);
3326 /* Copy all the DECL_... slots specified in the new decl
3327 except for any that we copy here from the old type. */
3328 DECL_MACHINE_ATTRIBUTES (newdecl
)
3329 = merge_machine_decl_attributes (olddecl
, newdecl
);
3331 if (TREE_CODE (newdecl
) == TEMPLATE_DECL
)
3333 if (! duplicate_decls (DECL_TEMPLATE_RESULT (newdecl
),
3334 DECL_TEMPLATE_RESULT (olddecl
)))
3335 cp_error ("invalid redeclaration of %D", newdecl
);
3336 TREE_TYPE (olddecl
) = TREE_TYPE (DECL_TEMPLATE_RESULT (olddecl
));
3337 DECL_TEMPLATE_SPECIALIZATIONS (olddecl
)
3338 = chainon (DECL_TEMPLATE_SPECIALIZATIONS (olddecl
),
3339 DECL_TEMPLATE_SPECIALIZATIONS (newdecl
));
3346 /* Automatically handles default parameters. */
3347 tree oldtype
= TREE_TYPE (olddecl
);
3350 /* Make sure we put the new type in the same obstack as the old one. */
3352 push_obstacks (TYPE_OBSTACK (oldtype
), TYPE_OBSTACK (oldtype
));
3354 push_permanent_obstack ();
3356 /* Merge the data types specified in the two decls. */
3357 newtype
= common_type (TREE_TYPE (newdecl
), TREE_TYPE (olddecl
));
3359 if (TREE_CODE (newdecl
) == VAR_DECL
)
3360 DECL_THIS_EXTERN (newdecl
) |= DECL_THIS_EXTERN (olddecl
);
3361 /* Do this after calling `common_type' so that default
3362 parameters don't confuse us. */
3363 else if (TREE_CODE (newdecl
) == FUNCTION_DECL
3364 && (TYPE_RAISES_EXCEPTIONS (TREE_TYPE (newdecl
))
3365 != TYPE_RAISES_EXCEPTIONS (TREE_TYPE (olddecl
))))
3367 TREE_TYPE (newdecl
) = build_exception_variant (newtype
,
3368 TYPE_RAISES_EXCEPTIONS (TREE_TYPE (newdecl
)));
3369 TREE_TYPE (olddecl
) = build_exception_variant (newtype
,
3370 TYPE_RAISES_EXCEPTIONS (oldtype
));
3372 if ((pedantic
|| ! DECL_IN_SYSTEM_HEADER (olddecl
))
3373 && DECL_SOURCE_LINE (olddecl
) != 0
3375 && !comp_except_specs (TYPE_RAISES_EXCEPTIONS (TREE_TYPE (newdecl
)),
3376 TYPE_RAISES_EXCEPTIONS (TREE_TYPE (olddecl
)), 1))
3378 cp_error ("declaration of `%F' throws different exceptions",
3380 cp_error_at ("to previous declaration `%F'", olddecl
);
3383 TREE_TYPE (newdecl
) = TREE_TYPE (olddecl
) = newtype
;
3385 /* Lay the type out, unless already done. */
3386 if (! same_type_p (newtype
, oldtype
)
3387 && TREE_TYPE (newdecl
) != error_mark_node
3388 && !(processing_template_decl
&& uses_template_parms (newdecl
)))
3389 layout_type (TREE_TYPE (newdecl
));
3391 if ((TREE_CODE (newdecl
) == VAR_DECL
3392 || TREE_CODE (newdecl
) == PARM_DECL
3393 || TREE_CODE (newdecl
) == RESULT_DECL
3394 || TREE_CODE (newdecl
) == FIELD_DECL
3395 || TREE_CODE (newdecl
) == TYPE_DECL
)
3396 && !(processing_template_decl
&& uses_template_parms (newdecl
)))
3397 layout_decl (newdecl
, 0);
3399 /* Merge the type qualifiers. */
3400 if (TREE_READONLY (newdecl
))
3401 TREE_READONLY (olddecl
) = 1;
3402 if (TREE_THIS_VOLATILE (newdecl
))
3403 TREE_THIS_VOLATILE (olddecl
) = 1;
3405 /* Merge the initialization information. */
3406 if (DECL_INITIAL (newdecl
) == NULL_TREE
3407 && DECL_INITIAL (olddecl
) != NULL_TREE
)
3409 DECL_INITIAL (newdecl
) = DECL_INITIAL (olddecl
);
3410 DECL_SOURCE_FILE (newdecl
) = DECL_SOURCE_FILE (olddecl
);
3411 DECL_SOURCE_LINE (newdecl
) = DECL_SOURCE_LINE (olddecl
);
3412 if (CAN_HAVE_FULL_LANG_DECL_P (newdecl
)
3413 && DECL_LANG_SPECIFIC (newdecl
)
3414 && DECL_LANG_SPECIFIC (olddecl
))
3415 DECL_SAVED_TREE (newdecl
) = DECL_SAVED_TREE (olddecl
);
3418 /* Merge the section attribute.
3419 We want to issue an error if the sections conflict but that must be
3420 done later in decl_attributes since we are called before attributes
3422 if (DECL_SECTION_NAME (newdecl
) == NULL_TREE
)
3423 DECL_SECTION_NAME (newdecl
) = DECL_SECTION_NAME (olddecl
);
3425 /* Keep the old rtl since we can safely use it. */
3426 DECL_RTL (newdecl
) = DECL_RTL (olddecl
);
3430 /* If cannot merge, then use the new type and qualifiers,
3431 and don't preserve the old rtl. */
3434 /* Clean out any memory we had of the old declaration. */
3435 tree oldstatic
= value_member (olddecl
, static_aggregates
);
3437 TREE_VALUE (oldstatic
) = error_mark_node
;
3439 TREE_TYPE (olddecl
) = TREE_TYPE (newdecl
);
3440 TREE_READONLY (olddecl
) = TREE_READONLY (newdecl
);
3441 TREE_THIS_VOLATILE (olddecl
) = TREE_THIS_VOLATILE (newdecl
);
3442 TREE_SIDE_EFFECTS (olddecl
) = TREE_SIDE_EFFECTS (newdecl
);
3445 /* Merge the storage class information. */
3446 DECL_WEAK (newdecl
) |= DECL_WEAK (olddecl
);
3447 DECL_ONE_ONLY (newdecl
) |= DECL_ONE_ONLY (olddecl
);
3448 TREE_PUBLIC (newdecl
) = TREE_PUBLIC (olddecl
);
3449 TREE_STATIC (olddecl
) = TREE_STATIC (newdecl
) |= TREE_STATIC (olddecl
);
3450 if (! DECL_EXTERNAL (olddecl
))
3451 DECL_EXTERNAL (newdecl
) = 0;
3453 if (DECL_LANG_SPECIFIC (newdecl
) && DECL_LANG_SPECIFIC (olddecl
))
3455 DECL_INTERFACE_KNOWN (newdecl
) |= DECL_INTERFACE_KNOWN (olddecl
);
3456 DECL_NOT_REALLY_EXTERN (newdecl
) |= DECL_NOT_REALLY_EXTERN (olddecl
);
3457 DECL_COMDAT (newdecl
) |= DECL_COMDAT (olddecl
);
3458 DECL_TEMPLATE_INSTANTIATED (newdecl
)
3459 |= DECL_TEMPLATE_INSTANTIATED (olddecl
);
3460 /* Don't really know how much of the language-specific
3461 values we should copy from old to new. */
3462 DECL_IN_AGGR_P (newdecl
) = DECL_IN_AGGR_P (olddecl
);
3463 DECL_ACCESS (newdecl
) = DECL_ACCESS (olddecl
);
3464 DECL_NONCONVERTING_P (newdecl
) = DECL_NONCONVERTING_P (olddecl
);
3465 DECL_TEMPLATE_INFO (newdecl
) = DECL_TEMPLATE_INFO (olddecl
);
3466 olddecl_friend
= DECL_FRIEND_P (olddecl
);
3468 /* Only functions have DECL_BEFRIENDING_CLASSES. */
3469 if (TREE_CODE (newdecl
) == FUNCTION_DECL
3470 || DECL_FUNCTION_TEMPLATE_P (newdecl
))
3471 DECL_BEFRIENDING_CLASSES (newdecl
)
3472 = chainon (DECL_BEFRIENDING_CLASSES (newdecl
),
3473 DECL_BEFRIENDING_CLASSES (olddecl
));
3476 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
3478 if (DECL_TEMPLATE_INSTANTIATION (olddecl
)
3479 && !DECL_TEMPLATE_INSTANTIATION (newdecl
))
3481 /* If newdecl is not a specialization, then it is not a
3482 template-related function at all. And that means that we
3483 shoud have exited above, returning 0. */
3484 my_friendly_assert (DECL_TEMPLATE_SPECIALIZATION (newdecl
),
3487 if (TREE_USED (olddecl
))
3488 /* From [temp.expl.spec]:
3490 If a template, a member template or the member of a class
3491 template is explicitly specialized then that
3492 specialization shall be declared before the first use of
3493 that specialization that would cause an implicit
3494 instantiation to take place, in every translation unit in
3495 which such a use occurs. */
3496 cp_error ("explicit specialization of %D after first use",
3499 SET_DECL_TEMPLATE_SPECIALIZATION (olddecl
);
3501 DECL_THIS_INLINE (newdecl
) |= DECL_THIS_INLINE (olddecl
);
3503 /* If either decl says `inline', this fn is inline, unless its
3504 definition was passed already. */
3505 if (DECL_INLINE (newdecl
) && DECL_INITIAL (olddecl
) == NULL_TREE
)
3506 DECL_INLINE (olddecl
) = 1;
3507 DECL_INLINE (newdecl
) = DECL_INLINE (olddecl
);
3511 DECL_LANGUAGE (olddecl
) = DECL_LANGUAGE (newdecl
);
3512 DECL_ASSEMBLER_NAME (olddecl
) = DECL_ASSEMBLER_NAME (newdecl
);
3513 DECL_RTL (olddecl
) = DECL_RTL (newdecl
);
3515 if (! types_match
|| new_defines_function
)
3517 /* These need to be copied so that the names are available.
3518 Note that if the types do match, we'll preserve inline
3519 info and other bits, but if not, we won't. */
3520 DECL_ARGUMENTS (olddecl
) = DECL_ARGUMENTS (newdecl
);
3521 DECL_RESULT (olddecl
) = DECL_RESULT (newdecl
);
3523 if (new_defines_function
)
3524 /* If defining a function declared with other language
3525 linkage, use the previously declared language linkage. */
3526 DECL_LANGUAGE (newdecl
) = DECL_LANGUAGE (olddecl
);
3527 else if (types_match
)
3529 /* If redeclaring a builtin function, and not a definition,
3530 it stays built in. */
3531 if (DECL_BUILT_IN (olddecl
))
3533 DECL_BUILT_IN_CLASS (newdecl
) = DECL_BUILT_IN_CLASS (olddecl
);
3534 DECL_FUNCTION_CODE (newdecl
) = DECL_FUNCTION_CODE (olddecl
);
3535 /* If we're keeping the built-in definition, keep the rtl,
3536 regardless of declaration matches. */
3537 DECL_RTL (newdecl
) = DECL_RTL (olddecl
);
3540 DECL_FRAME_SIZE (newdecl
) = DECL_FRAME_SIZE (olddecl
);
3542 DECL_RESULT (newdecl
) = DECL_RESULT (olddecl
);
3543 if ((DECL_SAVED_INSNS (newdecl
) = DECL_SAVED_INSNS (olddecl
)))
3544 /* Previously saved insns go together with
3545 the function's previous definition. */
3546 DECL_INITIAL (newdecl
) = DECL_INITIAL (olddecl
);
3547 /* Don't clear out the arguments if we're redefining a function. */
3548 if (DECL_ARGUMENTS (olddecl
))
3549 DECL_ARGUMENTS (newdecl
) = DECL_ARGUMENTS (olddecl
);
3551 if (DECL_LANG_SPECIFIC (olddecl
))
3552 DECL_MAIN_VARIANT (newdecl
) = DECL_MAIN_VARIANT (olddecl
);
3555 if (TREE_CODE (newdecl
) == NAMESPACE_DECL
)
3557 NAMESPACE_LEVEL (newdecl
) = NAMESPACE_LEVEL (olddecl
);
3560 /* Now preserve various other info from the definition. */
3561 TREE_ADDRESSABLE (newdecl
) = TREE_ADDRESSABLE (olddecl
);
3562 TREE_ASM_WRITTEN (newdecl
) = TREE_ASM_WRITTEN (olddecl
);
3563 DECL_COMMON (newdecl
) = DECL_COMMON (olddecl
);
3564 DECL_ASSEMBLER_NAME (newdecl
) = DECL_ASSEMBLER_NAME (olddecl
);
3566 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
3570 function_size
= sizeof (struct tree_decl
);
3572 bcopy ((char *) newdecl
+ sizeof (struct tree_common
),
3573 (char *) olddecl
+ sizeof (struct tree_common
),
3574 function_size
- sizeof (struct tree_common
));
3576 if (DECL_TEMPLATE_INSTANTIATION (newdecl
))
3578 /* If newdecl is a template instantiation, it is possible that
3579 the following sequence of events has occurred:
3581 o A friend function was declared in a class template. The
3582 class template was instantiated.
3584 o The instantiation of the friend declaration was
3585 recorded on the instantiation list, and is newdecl.
3587 o Later, however, instantiate_class_template called pushdecl
3588 on the newdecl to perform name injection. But, pushdecl in
3589 turn called duplicate_decls when it discovered that another
3590 declaration of a global function with the same name already
3593 o Here, in duplicate_decls, we decided to clobber newdecl.
3595 If we're going to do that, we'd better make sure that
3596 olddecl, and not newdecl, is on the list of
3597 instantiations so that if we try to do the instantiation
3598 again we won't get the clobbered declaration. */
3600 tree tmpl
= DECL_TI_TEMPLATE (newdecl
);
3601 tree decls
= DECL_TEMPLATE_SPECIALIZATIONS (tmpl
);
3603 for (; decls
; decls
= TREE_CHAIN (decls
))
3604 if (TREE_VALUE (decls
) == newdecl
)
3605 TREE_VALUE (decls
) = olddecl
;
3610 bcopy ((char *) newdecl
+ sizeof (struct tree_common
),
3611 (char *) olddecl
+ sizeof (struct tree_common
),
3612 sizeof (struct tree_decl
) - sizeof (struct tree_common
)
3613 + tree_code_length
[(int)TREE_CODE (newdecl
)] * sizeof (char *));
3616 DECL_UID (olddecl
) = olddecl_uid
;
3618 DECL_FRIEND_P (olddecl
) = 1;
3620 /* NEWDECL contains the merged attribute lists.
3621 Update OLDDECL to be the same. */
3622 DECL_MACHINE_ATTRIBUTES (olddecl
) = DECL_MACHINE_ATTRIBUTES (newdecl
);
3627 /* Record a decl-node X as belonging to the current lexical scope.
3628 Check for errors (such as an incompatible declaration for the same
3629 name already seen in the same scope).
3631 Returns either X or an old decl for the same name.
3632 If an old decl is returned, it may have been smashed
3633 to agree with what X says. */
3641 int need_new_binding
;
3643 /* We shouldn't be calling pushdecl when we're generating RTL for a
3644 function that we already did semantic analysis on previously. */
3645 my_friendly_assert (!current_function
|| doing_semantic_analysis_p (),
3648 name
= DECL_ASSEMBLER_NAME (x
);
3649 need_new_binding
= 1;
3651 if (DECL_TEMPLATE_PARM_P (x
))
3652 /* Template parameters have no context; they are not X::T even
3653 when declared within a class or namespace. */
3657 if (current_function_decl
&& x
!= current_function_decl
3658 /* A local declaration for a function doesn't constitute
3660 && !(TREE_CODE (x
) == FUNCTION_DECL
&& !DECL_INITIAL (x
))
3661 /* A local declaration for an `extern' variable is in the
3662 scoped of the current namespace, not the current
3664 && !(TREE_CODE (x
) == VAR_DECL
&& DECL_EXTERNAL (x
))
3665 /* Don't change DECL_CONTEXT of virtual methods. */
3666 && (TREE_CODE (x
) != FUNCTION_DECL
|| !DECL_VIRTUAL_P (x
))
3667 && !DECL_CONTEXT (x
))
3668 DECL_CONTEXT (x
) = current_function_decl
;
3669 if (!DECL_CONTEXT (x
))
3670 DECL_CONTEXT (x
) = FROB_CONTEXT (current_namespace
);
3673 /* Type are looked up using the DECL_NAME, as that is what the rest of the
3674 compiler wants to use. */
3675 if (TREE_CODE (x
) == TYPE_DECL
|| TREE_CODE (x
) == VAR_DECL
3676 || TREE_CODE (x
) == NAMESPACE_DECL
)
3677 name
= DECL_NAME (x
);
3682 /* Not needed...see below. */
3686 if (TREE_CODE (name
) == TEMPLATE_ID_EXPR
)
3687 name
= TREE_OPERAND (name
, 0);
3689 /* Namespace-scoped variables are not found in the current level. */
3690 if (TREE_CODE (x
) == VAR_DECL
&& DECL_NAMESPACE_SCOPE_P (x
))
3691 t
= namespace_binding (name
, DECL_CONTEXT (x
));
3693 t
= lookup_name_current_level (name
);
3694 if (t
== error_mark_node
)
3696 /* error_mark_node is 0 for a while during initialization! */
3698 cp_error_at ("`%#D' used prior to declaration", x
);
3701 else if (t
!= NULL_TREE
)
3704 /* This is turned off until I have time to do it right (bpk). */
3705 /* With the code below that uses it... */
3706 file
= DECL_SOURCE_FILE (t
);
3707 line
= DECL_SOURCE_LINE (t
);
3709 if (TREE_CODE (t
) == PARM_DECL
)
3711 if (DECL_CONTEXT (t
) == NULL_TREE
)
3712 fatal ("parse errors have confused me too much");
3714 /* Check for duplicate params. */
3715 if (duplicate_decls (x
, t
))
3718 else if (((TREE_CODE (x
) == FUNCTION_DECL
&& DECL_LANGUAGE (x
) == lang_c
)
3719 || DECL_FUNCTION_TEMPLATE_P (x
))
3720 && is_overloaded_fn (t
))
3721 /* Don't do anything just yet. */;
3722 else if (t
== wchar_decl_node
)
3724 if (pedantic
&& ! DECL_IN_SYSTEM_HEADER (x
))
3725 cp_pedwarn ("redeclaration of wchar_t as `%T'", TREE_TYPE (x
));
3727 /* Throw away the redeclaration. */
3730 else if (TREE_CODE (t
) != TREE_CODE (x
))
3732 if (duplicate_decls (x
, t
))
3735 else if (duplicate_decls (x
, t
))
3738 /* This is turned off until I have time to do it right (bpk). */
3740 /* Also warn if they did a prototype with `static' on it, but
3741 then later left the `static' off. */
3742 if (! TREE_PUBLIC (name
) && TREE_PUBLIC (x
))
3744 if (DECL_LANG_SPECIFIC (t
) && DECL_FRIEND_P (t
))
3749 cp_warning ("`static' missing from declaration of `%D'",
3751 warning_with_file_and_line (file
, line
,
3752 "previous declaration of `%s'",
3753 decl_as_string (t
, 0));
3756 /* Now fix things so it'll do what they expect. */
3757 if (current_function_decl
)
3758 TREE_PUBLIC (current_function_decl
) = 0;
3760 /* Due to interference in memory reclamation (X may be
3761 obstack-deallocated at this point), we must guard against
3762 one really special case. [jason: This should be handled
3763 by start_function] */
3764 if (current_function_decl
== x
)
3765 current_function_decl
= t
;
3767 if (TREE_CODE (t
) == TYPE_DECL
)
3768 SET_IDENTIFIER_TYPE_VALUE (name
, TREE_TYPE (t
));
3769 else if (TREE_CODE (t
) == FUNCTION_DECL
)
3770 check_default_args (t
);
3774 else if (DECL_MAIN_P (x
))
3776 /* A redeclaration of main, but not a duplicate of the
3781 This function shall not be overloaded. */
3782 cp_error_at ("invalid redeclaration of `%D'", t
);
3783 cp_error ("as `%D'", x
);
3784 /* We don't try to push this declaration since that
3790 check_template_shadow (x
);
3792 /* If this is a function conjured up by the backend, massage it
3793 so it looks friendly. */
3794 if (TREE_CODE (x
) == FUNCTION_DECL
3795 && ! DECL_LANG_SPECIFIC (x
))
3797 retrofit_lang_decl (x
);
3798 DECL_LANGUAGE (x
) = lang_c
;
3801 if (TREE_CODE (x
) == FUNCTION_DECL
&& ! DECL_FUNCTION_MEMBER_P (x
))
3803 t
= push_overloaded_decl (x
, PUSH_LOCAL
);
3806 if (!namespace_bindings_p ())
3807 /* We do not need to create a binding for this name;
3808 push_overloaded_decl will have already done so if
3810 need_new_binding
= 0;
3812 else if (DECL_FUNCTION_TEMPLATE_P (x
) && DECL_NAMESPACE_SCOPE_P (x
))
3814 t
= push_overloaded_decl (x
, PUSH_GLOBAL
);
3816 add_decl_to_level (x
, NAMESPACE_LEVEL (CP_DECL_CONTEXT (t
)));
3820 /* If declaring a type as a typedef, copy the type (unless we're
3821 at line 0), and install this TYPE_DECL as the new type's typedef
3822 name. See the extensive comment in ../c-decl.c (pushdecl). */
3823 if (TREE_CODE (x
) == TYPE_DECL
)
3825 tree type
= TREE_TYPE (x
);
3826 if (DECL_SOURCE_LINE (x
) == 0)
3828 if (TYPE_NAME (type
) == 0)
3829 TYPE_NAME (type
) = x
;
3831 else if (type
!= error_mark_node
&& TYPE_NAME (type
) != x
3832 /* We don't want to copy the type when all we're
3833 doing is making a TYPE_DECL for the purposes of
3835 && (!TYPE_NAME (type
)
3836 || TYPE_NAME (type
) != DECL_ABSTRACT_ORIGIN (x
)))
3838 push_obstacks (TYPE_OBSTACK (type
), TYPE_OBSTACK (type
));
3840 DECL_ORIGINAL_TYPE (x
) = type
;
3841 type
= build_type_copy (type
);
3842 TYPE_STUB_DECL (type
) = TYPE_STUB_DECL (DECL_ORIGINAL_TYPE (x
));
3843 TYPE_NAME (type
) = x
;
3844 TREE_TYPE (x
) = type
;
3849 if (type
!= error_mark_node
3851 && TYPE_IDENTIFIER (type
))
3852 set_identifier_type_value_with_scope (DECL_NAME (x
), type
,
3853 current_binding_level
);
3857 /* Multiple external decls of the same identifier ought to match.
3859 We get warnings about inline functions where they are defined.
3860 We get warnings about other functions from push_overloaded_decl.
3862 Avoid duplicate warnings where they are used. */
3863 if (TREE_PUBLIC (x
) && TREE_CODE (x
) != FUNCTION_DECL
)
3867 if (IDENTIFIER_NAMESPACE_VALUE (name
) != NULL_TREE
3868 && (DECL_EXTERNAL (IDENTIFIER_NAMESPACE_VALUE (name
))
3869 || TREE_PUBLIC (IDENTIFIER_NAMESPACE_VALUE (name
))))
3870 decl
= IDENTIFIER_NAMESPACE_VALUE (name
);
3875 /* If different sort of thing, we already gave an error. */
3876 && TREE_CODE (decl
) == TREE_CODE (x
)
3877 && !same_type_p (TREE_TYPE (x
), TREE_TYPE (decl
)))
3879 cp_pedwarn ("type mismatch with previous external decl", x
);
3880 cp_pedwarn_at ("previous external decl of `%#D'", decl
);
3884 /* This name is new in its binding level.
3885 Install the new declaration and return it. */
3886 if (namespace_bindings_p ())
3888 /* Install a global value. */
3890 /* If the first global decl has external linkage,
3891 warn if we later see static one. */
3892 if (IDENTIFIER_GLOBAL_VALUE (name
) == NULL_TREE
&& TREE_PUBLIC (x
))
3893 TREE_PUBLIC (name
) = 1;
3895 if (!(TREE_CODE (x
) == TYPE_DECL
&& DECL_ARTIFICIAL (x
)
3897 /* For an ordinary function, we create a binding from
3898 the mangled name (i.e., NAME) to the DECL. But, for
3899 an `extern "C"' function, the mangled name and the
3900 ordinary name are the same so we need not do this. */
3901 && !(TREE_CODE (x
) == FUNCTION_DECL
&&
3902 DECL_LANGUAGE (x
) == lang_c
))
3904 if (TREE_CODE (x
) == FUNCTION_DECL
)
3906 ((IDENTIFIER_GLOBAL_VALUE (name
) == NULL_TREE
)
3907 || (IDENTIFIER_GLOBAL_VALUE (name
) == x
), 378);
3908 SET_IDENTIFIER_NAMESPACE_VALUE (name
, x
);
3911 /* Don't forget if the function was used via an implicit decl. */
3912 if (IDENTIFIER_IMPLICIT_DECL (name
)
3913 && TREE_USED (IDENTIFIER_IMPLICIT_DECL (name
)))
3916 /* Don't forget if its address was taken in that way. */
3917 if (IDENTIFIER_IMPLICIT_DECL (name
)
3918 && TREE_ADDRESSABLE (IDENTIFIER_IMPLICIT_DECL (name
)))
3919 TREE_ADDRESSABLE (x
) = 1;
3921 /* Warn about mismatches against previous implicit decl. */
3922 if (IDENTIFIER_IMPLICIT_DECL (name
) != NULL_TREE
3923 /* If this real decl matches the implicit, don't complain. */
3924 && ! (TREE_CODE (x
) == FUNCTION_DECL
3925 && TREE_TYPE (TREE_TYPE (x
)) == integer_type_node
))
3927 ("`%D' was previously implicitly declared to return `int'", x
);
3929 /* If new decl is `static' and an `extern' was seen previously,
3931 if (x
!= NULL_TREE
&& t
!= NULL_TREE
&& decls_match (x
, t
))
3932 warn_extern_redeclared_static (x
, t
);
3936 /* Here to install a non-global value. */
3937 tree oldlocal
= IDENTIFIER_VALUE (name
);
3938 tree oldglobal
= IDENTIFIER_NAMESPACE_VALUE (name
);
3940 if (need_new_binding
)
3942 push_local_binding (name
, x
, 0);
3943 /* Because push_local_binding will hook X on to the
3944 current_binding_level's name list, we don't want to
3945 do that again below. */
3946 need_new_binding
= 0;
3949 /* If this is a TYPE_DECL, push it into the type value slot. */
3950 if (TREE_CODE (x
) == TYPE_DECL
)
3951 set_identifier_type_value_with_scope (name
, TREE_TYPE (x
),
3952 current_binding_level
);
3954 /* Clear out any TYPE_DECL shadowed by a namespace so that
3955 we won't think this is a type. The C struct hack doesn't
3956 go through namespaces. */
3957 if (TREE_CODE (x
) == NAMESPACE_DECL
)
3958 set_identifier_type_value_with_scope (name
, NULL_TREE
,
3959 current_binding_level
);
3961 /* If this is an extern function declaration, see if we
3962 have a global definition or declaration for the function. */
3963 if (oldlocal
== NULL_TREE
3964 && DECL_EXTERNAL (x
)
3965 && oldglobal
!= NULL_TREE
3966 && TREE_CODE (x
) == FUNCTION_DECL
3967 && TREE_CODE (oldglobal
) == FUNCTION_DECL
)
3969 /* We have one. Their types must agree. */
3970 if (decls_match (x
, oldglobal
))
3974 cp_warning ("extern declaration of `%#D' doesn't match", x
);
3975 cp_warning_at ("global declaration `%#D'", oldglobal
);
3978 /* If we have a local external declaration,
3979 and no file-scope declaration has yet been seen,
3980 then if we later have a file-scope decl it must not be static. */
3981 if (oldlocal
== NULL_TREE
3982 && oldglobal
== NULL_TREE
3983 && DECL_EXTERNAL (x
)
3985 TREE_PUBLIC (name
) = 1;
3987 if (DECL_FROM_INLINE (x
))
3988 /* Inline decls shadow nothing. */;
3990 /* Warn if shadowing an argument at the top level of the body. */
3991 else if (oldlocal
!= NULL_TREE
&& !DECL_EXTERNAL (x
)
3992 && TREE_CODE (oldlocal
) == PARM_DECL
3993 /* Don't complain if it's from an enclosing function. */
3994 && DECL_CONTEXT (oldlocal
) == current_function_decl
3995 && TREE_CODE (x
) != PARM_DECL
)
3997 /* Go to where the parms should be and see if we
3999 struct binding_level
*b
= current_binding_level
->level_chain
;
4005 if (b
->parm_flag
== 1)
4006 cp_error ("declaration of `%#D' shadows a parameter", name
);
4008 else if (warn_shadow
&& oldlocal
!= NULL_TREE
4009 && current_binding_level
->is_for_scope
4010 && !DECL_DEAD_FOR_LOCAL (oldlocal
))
4012 warning ("variable `%s' shadows local",
4013 IDENTIFIER_POINTER (name
));
4014 cp_warning_at (" this is the shadowed declaration", oldlocal
);
4016 /* Maybe warn if shadowing something else. */
4017 else if (warn_shadow
&& !DECL_EXTERNAL (x
)
4018 /* No shadow warnings for internally generated vars. */
4019 && ! DECL_ARTIFICIAL (x
)
4020 /* No shadow warnings for vars made for inlining. */
4021 && ! DECL_FROM_INLINE (x
))
4023 const char *warnstring
= NULL
;
4025 if (oldlocal
!= NULL_TREE
&& TREE_CODE (oldlocal
) == PARM_DECL
)
4026 warnstring
= "declaration of `%s' shadows a parameter";
4027 else if (IDENTIFIER_CLASS_VALUE (name
) != NULL_TREE
4028 && current_class_ptr
4029 && !TREE_STATIC (name
))
4030 warnstring
= "declaration of `%s' shadows a member of `this'";
4031 else if (oldlocal
!= NULL_TREE
)
4032 warnstring
= "declaration of `%s' shadows previous local";
4033 else if (oldglobal
!= NULL_TREE
)
4034 /* XXX shadow warnings in outer-more namespaces */
4035 warnstring
= "declaration of `%s' shadows global declaration";
4038 warning (warnstring
, IDENTIFIER_POINTER (name
));
4042 if (TREE_CODE (x
) == FUNCTION_DECL
)
4043 check_default_args (x
);
4045 /* Keep count of variables in this level with incomplete type. */
4046 if (TREE_CODE (x
) == VAR_DECL
4047 && TREE_TYPE (x
) != error_mark_node
4048 && ((TYPE_SIZE (TREE_TYPE (x
)) == NULL_TREE
4049 && PROMOTES_TO_AGGR_TYPE (TREE_TYPE (x
), ARRAY_TYPE
))
4050 /* RTTI TD entries are created while defining the type_info. */
4051 || (TYPE_LANG_SPECIFIC (TREE_TYPE (x
))
4052 && TYPE_BEING_DEFINED (TREE_TYPE (x
)))))
4053 current_binding_level
->incomplete
4054 = tree_cons (NULL_TREE
, x
, current_binding_level
->incomplete
);
4057 if (need_new_binding
)
4058 add_decl_to_level (x
,
4059 DECL_NAMESPACE_SCOPE_P (x
)
4060 ? NAMESPACE_LEVEL (CP_DECL_CONTEXT (x
))
4061 : current_binding_level
);
4066 /* Same as pushdecl, but define X in binding-level LEVEL. We rely on the
4067 caller to set DECL_CONTEXT properly. */
4070 pushdecl_with_scope (x
, level
)
4072 struct binding_level
*level
;
4074 register struct binding_level
*b
;
4075 tree function_decl
= current_function_decl
;
4077 current_function_decl
= NULL_TREE
;
4078 if (level
->parm_flag
== 2)
4080 b
= class_binding_level
;
4081 class_binding_level
= level
;
4082 pushdecl_class_level (x
);
4083 class_binding_level
= b
;
4087 b
= current_binding_level
;
4088 current_binding_level
= level
;
4090 current_binding_level
= b
;
4092 current_function_decl
= function_decl
;
4096 /* Like pushdecl, only it places X in the current namespace,
4100 pushdecl_namespace_level (x
)
4103 register struct binding_level
*b
= current_binding_level
;
4106 t
= pushdecl_with_scope (x
, NAMESPACE_LEVEL (current_namespace
));
4108 /* Now, the type_shadowed stack may screw us. Munge it so it does
4110 if (TREE_CODE (x
) == TYPE_DECL
)
4112 tree name
= DECL_NAME (x
);
4114 tree
*ptr
= (tree
*)0;
4115 for (; b
!= global_binding_level
; b
= b
->level_chain
)
4117 tree shadowed
= b
->type_shadowed
;
4118 for (; shadowed
; shadowed
= TREE_CHAIN (shadowed
))
4119 if (TREE_PURPOSE (shadowed
) == name
)
4121 ptr
= &TREE_VALUE (shadowed
);
4122 /* Can't break out of the loop here because sometimes
4123 a binding level will have duplicate bindings for
4124 PT names. It's gross, but I haven't time to fix it. */
4127 newval
= TREE_TYPE (x
);
4128 if (ptr
== (tree
*)0)
4130 /* @@ This shouldn't be needed. My test case "zstring.cc" trips
4131 up here if this is changed to an assertion. --KR */
4132 SET_IDENTIFIER_TYPE_VALUE (name
, newval
);
4142 /* Like pushdecl, only it places X in GLOBAL_BINDING_LEVEL,
4146 pushdecl_top_level (x
)
4149 push_to_top_level ();
4150 x
= pushdecl_namespace_level (x
);
4151 pop_from_top_level ();
4155 /* Make the declaration of X appear in CLASS scope. */
4158 pushdecl_class_level (x
)
4161 /* Don't use DECL_ASSEMBLER_NAME here! Everything that looks in class
4162 scope looks for the pre-mangled name. */
4165 if (TREE_CODE (x
) == OVERLOAD
)
4166 x
= OVL_CURRENT (x
);
4167 name
= DECL_NAME (x
);
4171 push_class_level_binding (name
, x
);
4172 if (TREE_CODE (x
) == TYPE_DECL
)
4173 set_identifier_type_value (name
, TREE_TYPE (x
));
4175 else if (ANON_AGGR_TYPE_P (TREE_TYPE (x
)))
4179 for (f
= TYPE_FIELDS (TREE_TYPE (x
));
4182 pushdecl_class_level (f
);
4186 /* Enter DECL into the symbol table, if that's appropriate. Returns
4187 DECL, or a modified version thereof. */
4190 maybe_push_decl (decl
)
4193 tree type
= TREE_TYPE (decl
);
4195 /* Add this decl to the current binding level, but not if it comes
4196 from another scope, e.g. a static member variable. TEM may equal
4197 DECL or it may be a previous decl of the same name. */
4198 if ((TREE_CODE (decl
) != PARM_DECL
4199 && DECL_CONTEXT (decl
) != NULL_TREE
4200 /* Definitions of namespace members outside their namespace are
4202 && TREE_CODE (DECL_CONTEXT (decl
)) != NAMESPACE_DECL
)
4203 || (TREE_CODE (decl
) == TEMPLATE_DECL
&& !namespace_bindings_p ())
4204 || TREE_CODE (type
) == UNKNOWN_TYPE
4205 /* The declaration of a template specialization does not affect
4206 the functions available for overload resolution, so we do not
4208 || (TREE_CODE (decl
) == FUNCTION_DECL
4209 && DECL_TEMPLATE_SPECIALIZATION (decl
)))
4212 return pushdecl (decl
);
4216 /* This function is used to push the mangled decls for nested types into
4217 the appropriate scope. Previously pushdecl_top_level was used, but that
4218 is incorrect for members of local classes. */
4221 pushdecl_nonclass_level (x
)
4224 struct binding_level
*b
= current_binding_level
;
4226 my_friendly_assert (b
->parm_flag
!= 2, 180);
4229 /* Get out of template binding levels */
4230 while (b
->pseudo_global
)
4234 pushdecl_with_scope (x
, b
);
4238 /* Make the declaration(s) of X appear in CLASS scope
4239 under the name NAME. */
4242 push_class_level_binding (name
, x
)
4247 /* The class_binding_level will be NULL if x is a template
4248 parameter name in a member template. */
4249 if (!class_binding_level
)
4252 /* Make sure that this new member does not have the same name
4253 as a template parameter. */
4254 if (TYPE_BEING_DEFINED (current_class_type
))
4255 check_template_shadow (x
);
4257 /* If this declaration shadows a declaration from an enclosing
4258 class, then we will need to restore IDENTIFIER_CLASS_VALUE when
4259 we leave this class. Record the shadowed declaration here. */
4260 binding
= IDENTIFIER_BINDING (name
);
4262 && ((TREE_CODE (x
) == OVERLOAD
4263 && BINDING_VALUE (binding
)
4264 && is_overloaded_fn (BINDING_VALUE (binding
)))
4265 || INHERITED_VALUE_BINDING_P (binding
)))
4270 /* If the old binding was from a base class, and was for a tag
4271 name, slide it over to make room for the new binding. The
4272 old binding is still visible if explicitly qualified with a
4274 if (INHERITED_VALUE_BINDING_P (binding
)
4275 && BINDING_VALUE (binding
)
4276 && TREE_CODE (BINDING_VALUE (binding
)) == TYPE_DECL
4277 && DECL_ARTIFICIAL (BINDING_VALUE (binding
))
4278 && !(TREE_CODE (x
) == TYPE_DECL
&& DECL_ARTIFICIAL (x
)))
4280 old_decl
= BINDING_TYPE (binding
);
4281 BINDING_TYPE (binding
) = BINDING_VALUE (binding
);
4282 BINDING_VALUE (binding
) = NULL_TREE
;
4283 INHERITED_VALUE_BINDING_P (binding
) = 0;
4286 old_decl
= BINDING_VALUE (binding
);
4288 /* There was already a binding for X containing fewer
4289 functions than are named in X. Find the previous
4290 declaration of X on the class-shadowed list, and update it. */
4291 for (shadow
= class_binding_level
->class_shadowed
;
4293 shadow
= TREE_CHAIN (shadow
))
4294 if (TREE_PURPOSE (shadow
) == name
4295 && TREE_TYPE (shadow
) == old_decl
)
4297 BINDING_VALUE (binding
) = x
;
4298 INHERITED_VALUE_BINDING_P (binding
) = 0;
4299 TREE_TYPE (shadow
) = x
;
4304 /* If we didn't replace an existing binding, put the binding on the
4305 stack of bindings for the identifier, and update
4306 IDENTIFIER_CLASS_VALUE. */
4307 if (push_class_binding (name
, x
))
4309 class_binding_level
->class_shadowed
4310 = tree_cons (name
, IDENTIFIER_CLASS_VALUE (name
),
4311 class_binding_level
->class_shadowed
);
4312 /* Record the value we are binding NAME to so that we can know
4313 what to pop later. */
4314 TREE_TYPE (class_binding_level
->class_shadowed
) = x
;
4318 /* Insert another USING_DECL into the current binding level,
4319 returning this declaration. If this is a redeclaration,
4320 do nothing and return NULL_TREE. */
4323 push_using_decl (scope
, name
)
4329 my_friendly_assert (TREE_CODE (scope
) == NAMESPACE_DECL
, 383);
4330 my_friendly_assert (TREE_CODE (name
) == IDENTIFIER_NODE
, 384);
4331 for (decl
= current_binding_level
->usings
; decl
; decl
= TREE_CHAIN (decl
))
4332 if (DECL_INITIAL (decl
) == scope
&& DECL_NAME (decl
) == name
)
4336 decl
= build_lang_decl (USING_DECL
, name
, void_type_node
);
4337 DECL_INITIAL (decl
) = scope
;
4338 TREE_CHAIN (decl
) = current_binding_level
->usings
;
4339 current_binding_level
->usings
= decl
;
4343 /* Add namespace to using_directives. Return NULL_TREE if nothing was
4344 changed (i.e. there was already a directive), or the fresh
4345 TREE_LIST otherwise. */
4348 push_using_directive (used
)
4351 tree ud
= current_binding_level
->using_directives
;
4352 tree iter
, ancestor
;
4354 /* Check if we already have this. */
4355 if (purpose_member (used
, ud
) != NULL_TREE
)
4358 /* Recursively add all namespaces used. */
4359 for (iter
= DECL_NAMESPACE_USING (used
); iter
; iter
= TREE_CHAIN (iter
))
4360 push_using_directive (TREE_PURPOSE (iter
));
4362 ancestor
= namespace_ancestor (current_decl_namespace (), used
);
4363 ud
= current_binding_level
->using_directives
;
4364 ud
= tree_cons (used
, ancestor
, ud
);
4365 current_binding_level
->using_directives
= ud
;
4369 /* DECL is a FUNCTION_DECL for a non-member function, which may have
4370 other definitions already in place. We get around this by making
4371 the value of the identifier point to a list of all the things that
4372 want to be referenced by that name. It is then up to the users of
4373 that name to decide what to do with that list.
4375 DECL may also be a TEMPLATE_DECL, with a FUNCTION_DECL in its DECL_RESULT
4376 slot. It is dealt with the same way.
4378 FLAGS is a bitwise-or of the following values:
4379 PUSH_LOCAL: Bind DECL in the current scope, rather than at
4381 PUSH_USING: DECL is being pushed as the result of a using
4384 The value returned may be a previous declaration if we guessed wrong
4385 about what language DECL should belong to (C or C++). Otherwise,
4386 it's always DECL (and never something that's not a _DECL). */
4389 push_overloaded_decl (decl
, flags
)
4393 tree name
= DECL_NAME (decl
);
4396 int doing_global
= (namespace_bindings_p () || !(flags
& PUSH_LOCAL
));
4399 old
= namespace_binding (name
, DECL_CONTEXT (decl
));
4401 old
= lookup_name_current_level (name
);
4405 if (TREE_CODE (old
) == TYPE_DECL
&& DECL_ARTIFICIAL (old
))
4407 tree t
= TREE_TYPE (old
);
4408 if (IS_AGGR_TYPE (t
) && warn_shadow
4409 && (! DECL_IN_SYSTEM_HEADER (decl
)
4410 || ! DECL_IN_SYSTEM_HEADER (old
)))
4411 cp_warning ("`%#D' hides constructor for `%#T'", decl
, t
);
4414 else if (is_overloaded_fn (old
))
4418 for (tmp
= old
; tmp
; tmp
= OVL_NEXT (tmp
))
4420 tree fn
= OVL_CURRENT (tmp
);
4422 if (TREE_CODE (tmp
) == OVERLOAD
&& OVL_USED (tmp
)
4423 && !(flags
& PUSH_USING
)
4424 && compparms (TYPE_ARG_TYPES (TREE_TYPE (fn
)),
4425 TYPE_ARG_TYPES (TREE_TYPE (decl
))))
4426 cp_error ("`%#D' conflicts with previous using declaration `%#D'",
4429 if (duplicate_decls (decl
, fn
))
4435 cp_error_at ("previous non-function declaration `%#D'", old
);
4436 cp_error ("conflicts with function declaration `%#D'", decl
);
4441 if (old
|| TREE_CODE (decl
) == TEMPLATE_DECL
)
4443 if (old
&& TREE_CODE (old
) != OVERLOAD
)
4444 new_binding
= ovl_cons (decl
, ovl_cons (old
, NULL_TREE
));
4446 new_binding
= ovl_cons (decl
, old
);
4447 if (flags
& PUSH_USING
)
4448 OVL_USED (new_binding
) = 1;
4451 /* NAME is not ambiguous. */
4455 set_namespace_binding (name
, current_namespace
, new_binding
);
4458 /* We only create an OVERLOAD if there was a previous binding at
4459 this level, or if decl is a template. In the former case, we
4460 need to remove the old binding and replace it with the new
4461 binding. We must also run through the NAMES on the binding
4462 level where the name was bound to update the chain. */
4464 if (TREE_CODE (new_binding
) == OVERLOAD
&& old
)
4468 for (d
= &BINDING_LEVEL (IDENTIFIER_BINDING (name
))->names
;
4470 d
= &TREE_CHAIN (*d
))
4472 || (TREE_CODE (*d
) == TREE_LIST
4473 && TREE_VALUE (*d
) == old
))
4475 if (TREE_CODE (*d
) == TREE_LIST
)
4476 /* Just replace the old binding with the new. */
4477 TREE_VALUE (*d
) = new_binding
;
4479 /* Build a TREE_LIST to wrap the OVERLOAD. */
4480 *d
= tree_cons (NULL_TREE
, new_binding
,
4483 /* And update the CPLUS_BINDING node. */
4484 BINDING_VALUE (IDENTIFIER_BINDING (name
))
4489 /* We should always find a previous binding in this case. */
4490 my_friendly_abort (0);
4493 /* Install the new binding. */
4494 push_local_binding (name
, new_binding
, flags
);
4500 /* Generate an implicit declaration for identifier FUNCTIONID
4501 as a function of type int (). Print a warning if appropriate. */
4504 implicitly_declare (functionid
)
4508 int temp
= allocation_temporary_p ();
4510 push_obstacks_nochange ();
4512 /* Save the decl permanently so we can warn if definition follows.
4513 In ANSI C, warn_implicit is usually false, so the saves little space.
4514 But in C++, it's usually true, hence the extra code. */
4515 if (temp
&& (! warn_implicit
|| toplevel_bindings_p ()))
4516 end_temporary_allocation ();
4518 /* We used to reuse an old implicit decl here,
4519 but this loses with inline functions because it can clobber
4520 the saved decl chains. */
4521 decl
= build_lang_decl (FUNCTION_DECL
, functionid
, default_function_type
);
4523 DECL_EXTERNAL (decl
) = 1;
4524 TREE_PUBLIC (decl
) = 1;
4526 /* ANSI standard says implicit declarations are in the innermost block.
4527 So we record the decl in the standard fashion. */
4529 rest_of_decl_compilation (decl
, NULL_PTR
, 0, 0);
4532 /* Only one warning per identifier. */
4533 && IDENTIFIER_IMPLICIT_DECL (functionid
) == NULL_TREE
)
4535 cp_pedwarn ("implicit declaration of function `%#D'", decl
);
4538 SET_IDENTIFIER_IMPLICIT_DECL (functionid
, decl
);
4545 /* Return zero if the declaration NEWDECL is valid
4546 when the declaration OLDDECL (assumed to be for the same name)
4547 has already been seen.
4548 Otherwise return an error message format string with a %s
4549 where the identifier should go. */
4552 redeclaration_error_message (newdecl
, olddecl
)
4553 tree newdecl
, olddecl
;
4555 if (TREE_CODE (newdecl
) == TYPE_DECL
)
4557 /* Because C++ can put things into name space for free,
4558 constructs like "typedef struct foo { ... } foo"
4559 would look like an erroneous redeclaration. */
4560 if (same_type_p (TREE_TYPE (newdecl
), TREE_TYPE (olddecl
)))
4563 return "redefinition of `%#D'";
4565 else if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
4567 /* If this is a pure function, its olddecl will actually be
4568 the original initialization to `0' (which we force to call
4569 abort()). Don't complain about redefinition in this case. */
4570 if (DECL_LANG_SPECIFIC (olddecl
) && DECL_ABSTRACT_VIRTUAL_P (olddecl
))
4573 /* If both functions come from different namespaces, this is not
4574 a redeclaration - this is a conflict with a used function. */
4575 if (DECL_NAMESPACE_SCOPE_P (olddecl
)
4576 && DECL_CONTEXT (olddecl
) != DECL_CONTEXT (newdecl
))
4577 return "`%D' conflicts with used function";
4579 /* We'll complain about linkage mismatches in
4580 warn_extern_redeclared_static. */
4582 /* Defining the same name twice is no good. */
4583 if (DECL_INITIAL (olddecl
) != NULL_TREE
4584 && DECL_INITIAL (newdecl
) != NULL_TREE
)
4586 if (DECL_NAME (olddecl
) == NULL_TREE
)
4587 return "`%#D' not declared in class";
4589 return "redefinition of `%#D'";
4593 else if (TREE_CODE (newdecl
) == TEMPLATE_DECL
)
4595 if ((TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) == FUNCTION_DECL
4596 && DECL_INITIAL (DECL_TEMPLATE_RESULT (newdecl
))
4597 && DECL_INITIAL (DECL_TEMPLATE_RESULT (olddecl
)))
4598 || (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) == TYPE_DECL
4599 && TYPE_SIZE (TREE_TYPE (newdecl
))
4600 && TYPE_SIZE (TREE_TYPE (olddecl
))))
4601 return "redefinition of `%#D'";
4604 else if (toplevel_bindings_p ())
4606 /* Objects declared at top level: */
4607 /* If at least one is a reference, it's ok. */
4608 if (DECL_EXTERNAL (newdecl
) || DECL_EXTERNAL (olddecl
))
4610 /* Reject two definitions. */
4611 return "redefinition of `%#D'";
4615 /* Objects declared with block scope: */
4616 /* Reject two definitions, and reject a definition
4617 together with an external reference. */
4618 if (!(DECL_EXTERNAL (newdecl
) && DECL_EXTERNAL (olddecl
)))
4619 return "redeclaration of `%#D'";
4624 /* Create a new label, named ID. */
4627 make_label_decl (id
, local_p
)
4633 decl
= build_decl (LABEL_DECL
, id
, void_type_node
);
4635 /* Make sure every label has an rtx. */
4638 DECL_CONTEXT (decl
) = current_function_decl
;
4639 DECL_MODE (decl
) = VOIDmode
;
4640 C_DECLARED_LABEL_FLAG (decl
) = local_p
;
4642 /* Say where one reference is to the label, for the sake of the
4643 error if it is not defined. */
4644 DECL_SOURCE_LINE (decl
) = lineno
;
4645 DECL_SOURCE_FILE (decl
) = input_filename
;
4647 /* Record the fact that this identifier is bound to this label. */
4648 SET_IDENTIFIER_LABEL_VALUE (id
, decl
);
4650 /* Record this label on the list of used labels so that we can check
4651 at the end of the function to see whether or not the label was
4652 actually defined. */
4653 if ((named_label_uses
== NULL
|| named_label_uses
->label_decl
!= decl
)
4654 && (named_label_uses
== NULL
4655 || named_label_uses
->names_in_scope
!= current_binding_level
->names
4656 || named_label_uses
->label_decl
!= decl
))
4658 struct named_label_list
*new_ent
;
4660 = (struct named_label_list
*)oballoc (sizeof (struct named_label_list
));
4661 new_ent
->label_decl
= decl
;
4662 new_ent
->names_in_scope
= current_binding_level
->names
;
4663 new_ent
->binding_level
= current_binding_level
;
4664 new_ent
->lineno_o_goto
= lineno
;
4665 new_ent
->filename_o_goto
= input_filename
;
4666 new_ent
->next
= named_label_uses
;
4667 named_label_uses
= new_ent
;
4673 /* Look for a label named ID in the current function. If one cannot
4674 be found, create one. (We keep track of used, but undefined,
4675 labels, and complain about them at the end of a function.) */
4683 /* You can't use labels at global scope. */
4684 if (current_function_decl
== NULL_TREE
)
4686 error ("label `%s' referenced outside of any function",
4687 IDENTIFIER_POINTER (id
));
4691 /* See if we've already got this label. */
4692 decl
= IDENTIFIER_LABEL_VALUE (id
);
4693 if (decl
!= NULL_TREE
&& DECL_CONTEXT (decl
) == current_function_decl
)
4696 /* Record this label on the list of labels used in this function.
4697 We do this before calling make_label_decl so that we get the
4698 IDENTIFIER_LABEL_VALUE before the new label is declared. */
4699 named_labels
= tree_cons (IDENTIFIER_LABEL_VALUE (id
), NULL_TREE
,
4701 /* We need a new label. */
4702 decl
= make_label_decl (id
, /*local_p=*/0);
4703 /* Now fill in the information we didn't have before. */
4704 TREE_VALUE (named_labels
) = decl
;
4709 /* Declare a local label named ID. */
4712 declare_local_label (id
)
4717 /* Add a new entry to the SHADOWED_LABELS list so that when we leave
4718 this scope we can restore the old value of
4719 IDENTIFIER_TYPE_VALUE. */
4720 current_binding_level
->shadowed_labels
4721 = tree_cons (IDENTIFIER_LABEL_VALUE (id
), NULL_TREE
,
4722 current_binding_level
->shadowed_labels
);
4723 /* Look for the label. */
4724 decl
= make_label_decl (id
, /*local_p=*/1);
4725 /* Now fill in the information we didn't have before. */
4726 TREE_VALUE (current_binding_level
->shadowed_labels
) = decl
;
4731 /* Define a label, specifying the location in the source file.
4732 Return the LABEL_DECL node for the label, if the definition is valid.
4733 Otherwise return 0. */
4736 define_label (filename
, line
, name
)
4741 tree decl
= lookup_label (name
);
4743 /* After labels, make any new cleanups go into their
4744 own new (temporary) binding contour. */
4745 current_binding_level
->more_cleanups_ok
= 0;
4747 if (name
== get_identifier ("wchar_t"))
4748 cp_pedwarn ("label named wchar_t");
4750 if (DECL_INITIAL (decl
) != NULL_TREE
)
4752 cp_error ("duplicate label `%D'", decl
);
4757 struct named_label_list
*uses
, *prev
;
4761 /* Mark label as having been defined. */
4762 DECL_INITIAL (decl
) = error_mark_node
;
4763 /* Say where in the source. */
4764 DECL_SOURCE_FILE (decl
) = filename
;
4765 DECL_SOURCE_LINE (decl
) = line
;
4768 uses
= named_label_uses
;
4769 while (uses
!= NULL
)
4770 if (uses
->label_decl
== decl
)
4772 struct binding_level
*b
= current_binding_level
;
4775 tree new_decls
= b
->names
;
4776 tree old_decls
= (b
== uses
->binding_level
)
4777 ? uses
->names_in_scope
: NULL_TREE
;
4778 while (new_decls
!= old_decls
)
4780 if (TREE_CODE (new_decls
) == VAR_DECL
4781 /* Don't complain about crossing initialization
4782 of internal entities. They can't be accessed,
4783 and they should be cleaned up
4784 by the time we get to the label. */
4785 && ! DECL_ARTIFICIAL (new_decls
)
4786 && !(DECL_INITIAL (new_decls
) == NULL_TREE
4787 && pod_type_p (TREE_TYPE (new_decls
))))
4789 /* This is really only important if we're crossing
4790 an initialization. The POD stuff is just
4791 pedantry; why should it matter if the class
4792 contains a field of pointer to member type? */
4793 int problem
= (DECL_INITIAL (new_decls
)
4794 || (TYPE_NEEDS_CONSTRUCTING
4795 (TREE_TYPE (new_decls
))));
4801 cp_error ("jump to label `%D'", decl
);
4802 error_with_file_and_line
4803 (uses
->filename_o_goto
,
4804 uses
->lineno_o_goto
, " from here");
4808 cp_pedwarn ("jump to label `%D'", decl
);
4809 pedwarn_with_file_and_line
4810 (uses
->filename_o_goto
,
4811 uses
->lineno_o_goto
, " from here");
4817 cp_error_at (" crosses initialization of `%#D'",
4820 cp_pedwarn_at (" enters scope of non-POD `%#D'",
4823 new_decls
= TREE_CHAIN (new_decls
);
4825 if (b
== uses
->binding_level
)
4827 if (b
->eh_region
&& ! saw_eh
)
4831 cp_error ("jump to label `%D'", decl
);
4832 error_with_file_and_line
4833 (uses
->filename_o_goto
,
4834 uses
->lineno_o_goto
, " from here");
4837 error (" enters exception handling block");
4844 prev
->next
= uses
->next
;
4846 named_label_uses
= uses
->next
;
4855 current_function_return_value
= NULL_TREE
;
4862 struct binding_level
*level
;
4863 struct cp_switch
*next
;
4866 static struct cp_switch
*switch_stack
;
4872 = (struct cp_switch
*) oballoc (sizeof (struct cp_switch
));
4873 p
->level
= current_binding_level
;
4874 p
->next
= switch_stack
;
4881 switch_stack
= switch_stack
->next
;
4884 /* Note that we've seen a definition of a case label, and complain if this
4885 is a bad place for one. */
4888 define_case_label ()
4890 tree cleanup
= last_cleanup_this_contour ();
4891 struct binding_level
*b
= current_binding_level
;
4895 /* Don't crash; we'll complain in do_case. */
4900 static int explained
= 0;
4901 cp_warning_at ("destructor needed for `%#D'", TREE_PURPOSE (cleanup
));
4902 warning ("where case label appears here");
4905 warning ("(enclose actions of previous case statements requiring");
4906 warning ("destructors in their own binding contours.)");
4911 for (; b
&& b
!= switch_stack
->level
; b
= b
->level_chain
)
4913 tree new_decls
= b
->names
;
4914 for (; new_decls
; new_decls
= TREE_CHAIN (new_decls
))
4916 if (TREE_CODE (new_decls
) == VAR_DECL
4917 /* Don't complain about crossing initialization
4918 of internal entities. They can't be accessed,
4919 and they should be cleaned up
4920 by the time we get to the label. */
4921 && ! DECL_ARTIFICIAL (new_decls
)
4922 && ((DECL_INITIAL (new_decls
) != NULL_TREE
4923 && DECL_INITIAL (new_decls
) != error_mark_node
)
4924 || TYPE_NEEDS_CONSTRUCTING (TREE_TYPE (new_decls
))))
4927 error ("jump to case label");
4929 cp_error_at (" crosses initialization of `%#D'",
4935 /* After labels, make any new cleanups go into their
4936 own new (temporary) binding contour. */
4938 current_binding_level
->more_cleanups_ok
= 0;
4939 current_function_return_value
= NULL_TREE
;
4942 /* Return the list of declarations of the current level.
4943 Note that this list is in reverse order unless/until
4944 you nreverse it; and when you do nreverse it, you must
4945 store the result back using `storedecls' or you will lose. */
4950 return current_binding_level
->names
;
4953 /* Return the list of type-tags (for structs, etc) of the current level. */
4958 return current_binding_level
->tags
;
4961 /* Store the list of declarations of the current level.
4962 This is done for the parameter declarations of a function being defined,
4963 after they are modified in the light of any missing parameters. */
4969 current_binding_level
->names
= decls
;
4972 /* Similarly, store the list of tags of the current level. */
4978 current_binding_level
->tags
= tags
;
4981 /* Given NAME, an IDENTIFIER_NODE,
4982 return the structure (or union or enum) definition for that name.
4983 Searches binding levels from BINDING_LEVEL up to the global level.
4984 If THISLEVEL_ONLY is nonzero, searches only the specified context
4985 (but skips any tag-transparent contexts to find one that is
4986 meaningful for tags).
4987 FORM says which kind of type the caller wants;
4988 it is RECORD_TYPE or UNION_TYPE or ENUMERAL_TYPE.
4989 If the wrong kind of type is found, and it's not a template, an error is
4993 lookup_tag (form
, name
, binding_level
, thislevel_only
)
4994 enum tree_code form
;
4996 struct binding_level
*binding_level
;
4999 register struct binding_level
*level
;
5000 /* Non-zero if, we should look past a pseudo-global level, even if
5002 int allow_pseudo_global
= 1;
5004 for (level
= binding_level
; level
; level
= level
->level_chain
)
5007 if (ANON_AGGRNAME_P (name
))
5008 for (tail
= level
->tags
; tail
; tail
= TREE_CHAIN (tail
))
5010 /* There's no need for error checking here, because
5011 anon names are unique throughout the compilation. */
5012 if (TYPE_IDENTIFIER (TREE_VALUE (tail
)) == name
)
5013 return TREE_VALUE (tail
);
5015 else if (level
->namespace_p
)
5016 /* Do namespace lookup. */
5017 for (tail
= current_namespace
; 1; tail
= CP_DECL_CONTEXT (tail
))
5019 tree old
= binding_for_name (name
, tail
);
5021 /* If we just skipped past a pseudo global level, even
5022 though THISLEVEL_ONLY, and we find a template class
5023 declaration, then we use the _TYPE node for the
5024 template. See the example below. */
5025 if (thislevel_only
&& !allow_pseudo_global
5026 && old
&& BINDING_VALUE (old
)
5027 && DECL_CLASS_TEMPLATE_P (BINDING_VALUE (old
)))
5028 old
= TREE_TYPE (BINDING_VALUE (old
));
5030 old
= BINDING_TYPE (old
);
5032 /* If it has an original type, it is a typedef, and we
5033 should not return it. */
5034 if (old
&& DECL_ORIGINAL_TYPE (TYPE_NAME (old
)))
5036 if (old
&& TREE_CODE (old
) != form
5037 && !(form
!= ENUMERAL_TYPE
&& TREE_CODE (old
) == TEMPLATE_DECL
))
5039 cp_error ("`%#D' redeclared as %C", old
, form
);
5044 if (thislevel_only
|| tail
== global_namespace
)
5048 for (tail
= level
->tags
; tail
; tail
= TREE_CHAIN (tail
))
5050 if (TREE_PURPOSE (tail
) == name
)
5052 enum tree_code code
= TREE_CODE (TREE_VALUE (tail
));
5053 /* Should tighten this up; it'll probably permit
5054 UNION_TYPE and a struct template, for example. */
5056 && !(form
!= ENUMERAL_TYPE
&& code
== TEMPLATE_DECL
))
5058 /* Definition isn't the kind we were looking for. */
5059 cp_error ("`%#D' redeclared as %C", TREE_VALUE (tail
),
5063 return TREE_VALUE (tail
);
5066 if (thislevel_only
&& ! level
->tag_transparent
)
5068 if (level
->pseudo_global
&& allow_pseudo_global
)
5070 /* We must deal with cases like this:
5072 template <class T> struct S;
5073 template <class T> struct S {};
5075 When looking up `S', for the second declaration, we
5076 would like to find the first declaration. But, we
5077 are in the pseudo-global level created for the
5078 template parameters, rather than the (surrounding)
5079 namespace level. Thus, we keep going one more level,
5080 even though THISLEVEL_ONLY is non-zero. */
5081 allow_pseudo_global
= 0;
5093 set_current_level_tags_transparency (tags_transparent
)
5094 int tags_transparent
;
5096 current_binding_level
->tag_transparent
= tags_transparent
;
5100 /* Given a type, find the tag that was defined for it and return the tag name.
5101 Otherwise return 0. However, the value can never be 0
5102 in the cases in which this is used.
5104 C++: If NAME is non-zero, this is the new name to install. This is
5105 done when replacing anonymous tags with real tag names. */
5108 lookup_tag_reverse (type
, name
)
5112 register struct binding_level
*level
;
5114 for (level
= current_binding_level
; level
; level
= level
->level_chain
)
5117 for (tail
= level
->tags
; tail
; tail
= TREE_CHAIN (tail
))
5119 if (TREE_VALUE (tail
) == type
)
5122 TREE_PURPOSE (tail
) = name
;
5123 return TREE_PURPOSE (tail
);
5130 /* Look up NAME in the NAMESPACE. */
5133 lookup_namespace_name (namespace, name
)
5134 tree
namespace, name
;
5137 tree template_id
= NULL_TREE
;
5139 my_friendly_assert (TREE_CODE (namespace) == NAMESPACE_DECL
, 370);
5141 if (TREE_CODE (name
) == NAMESPACE_DECL
)
5142 /* This happens for A::B<int> when B is a namespace. */
5144 else if (TREE_CODE (name
) == TEMPLATE_DECL
)
5146 /* This happens for A::B where B is a template, and there are no
5147 template arguments. */
5148 cp_error ("invalid use of `%D'", name
);
5149 return error_mark_node
;
5152 namespace = ORIGINAL_NAMESPACE (namespace);
5154 if (TREE_CODE (name
) == TEMPLATE_ID_EXPR
)
5157 name
= TREE_OPERAND (name
, 0);
5158 if (TREE_CODE (name
) == OVERLOAD
)
5159 name
= DECL_NAME (OVL_CURRENT (name
));
5160 else if (TREE_CODE_CLASS (TREE_CODE (name
)) == 'd')
5161 name
= DECL_NAME (name
);
5164 my_friendly_assert (TREE_CODE (name
) == IDENTIFIER_NODE
, 373);
5166 val
= make_node (CPLUS_BINDING
);
5167 if (!qualified_lookup_using_namespace (name
, namespace, val
, 0))
5168 return error_mark_node
;
5170 if (BINDING_VALUE (val
))
5172 val
= BINDING_VALUE (val
);
5176 if (DECL_CLASS_TEMPLATE_P (val
))
5177 val
= lookup_template_class (val
,
5178 TREE_OPERAND (template_id
, 1),
5179 /*in_decl=*/NULL_TREE
,
5180 /*context=*/NULL_TREE
,
5181 /*entering_scope=*/0);
5182 else if (DECL_FUNCTION_TEMPLATE_P (val
)
5183 || TREE_CODE (val
) == OVERLOAD
)
5184 val
= lookup_template_function (val
,
5185 TREE_OPERAND (template_id
, 1));
5188 cp_error ("`%D::%D' is not a template",
5190 return error_mark_node
;
5194 /* If we have a single function from a using decl, pull it out. */
5195 if (TREE_CODE (val
) == OVERLOAD
&& ! really_overloaded_fn (val
))
5196 val
= OVL_FUNCTION (val
);
5200 cp_error ("`%D' undeclared in namespace `%D'", name
, namespace);
5201 return error_mark_node
;
5204 /* Hash a TYPENAME_TYPE. K is really of type `tree'. */
5206 static unsigned long
5214 hash
= (((unsigned long) TYPE_CONTEXT (t
))
5215 ^ ((unsigned long) DECL_NAME (TYPE_NAME (t
))));
5220 /* Compare two TYPENAME_TYPEs. K1 and K2 are really of type `tree'. */
5223 typename_compare (k1
, k2
)
5234 d1
= TYPE_NAME (t1
);
5235 d2
= TYPE_NAME (t2
);
5237 return (DECL_NAME (d1
) == DECL_NAME (d2
)
5238 && same_type_p (TYPE_CONTEXT (t1
), TYPE_CONTEXT (t2
))
5239 && ((TREE_TYPE (t1
) != NULL_TREE
)
5240 == (TREE_TYPE (t2
) != NULL_TREE
))
5241 && same_type_p (TREE_TYPE (t1
), TREE_TYPE (t2
))
5242 && TYPENAME_TYPE_FULLNAME (t1
) == TYPENAME_TYPE_FULLNAME (t2
));
5245 /* Build a TYPENAME_TYPE. If the type is `typename T::t', CONTEXT is
5246 the type of `T', NAME is the IDENTIFIER_NODE for `t'. If BASE_TYPE
5247 is non-NULL, this type is being created by the implicit typename
5248 extension, and BASE_TYPE is a type named `t' in some base class of
5249 `T' which depends on template parameters.
5251 Returns the new TYPENAME_TYPE. */
5254 build_typename_type (context
, name
, fullname
, base_type
)
5262 struct hash_entry
* e
;
5264 static struct hash_table ht
;
5266 push_obstacks (&permanent_obstack
, &permanent_obstack
);
5270 static struct hash_table
*h
= &ht
;
5271 if (!hash_table_init (&ht
, &hash_newfunc
, &typename_hash
,
5273 fatal ("virtual memory exhausted");
5274 ggc_add_tree_hash_table_root (&h
, 1);
5277 /* Build the TYPENAME_TYPE. */
5278 t
= make_lang_type (TYPENAME_TYPE
);
5279 TYPE_CONTEXT (t
) = FROB_CONTEXT (context
);
5280 TYPENAME_TYPE_FULLNAME (t
) = fullname
;
5281 TREE_TYPE (t
) = base_type
;
5283 /* Build the corresponding TYPE_DECL. */
5284 d
= build_decl (TYPE_DECL
, name
, t
);
5285 TYPE_NAME (TREE_TYPE (d
)) = d
;
5286 TYPE_STUB_DECL (TREE_TYPE (d
)) = d
;
5287 DECL_CONTEXT (d
) = FROB_CONTEXT (context
);
5288 DECL_ARTIFICIAL (d
) = 1;
5290 /* See if we already have this type. */
5291 e
= hash_lookup (&ht
, t
, /*create=*/false, /*copy=*/0);
5295 /* Insert the type into the table. */
5296 hash_lookup (&ht
, t
, /*create=*/true, /*copy=*/0);
5304 make_typename_type (context
, name
)
5309 if (TREE_CODE_CLASS (TREE_CODE (name
)) == 't')
5311 if (!(TYPE_LANG_SPECIFIC (name
)
5312 && (CLASSTYPE_IS_TEMPLATE (name
)
5313 || CLASSTYPE_USE_TEMPLATE (name
))))
5314 name
= TYPE_IDENTIFIER (name
);
5316 /* Create a TEMPLATE_ID_EXPR for the type. */
5317 name
= build_nt (TEMPLATE_ID_EXPR
,
5318 CLASSTYPE_TI_TEMPLATE (name
),
5319 CLASSTYPE_TI_ARGS (name
));
5321 else if (TREE_CODE (name
) == TYPE_DECL
)
5322 name
= DECL_NAME (name
);
5326 if (TREE_CODE (name
) == TEMPLATE_ID_EXPR
)
5328 name
= TREE_OPERAND (name
, 0);
5329 if (TREE_CODE (name
) == TEMPLATE_DECL
)
5330 name
= TREE_OPERAND (fullname
, 0) = DECL_NAME (name
);
5332 if (TREE_CODE (name
) != IDENTIFIER_NODE
)
5333 my_friendly_abort (2000);
5335 if (TREE_CODE (context
) == NAMESPACE_DECL
)
5337 /* We can get here from typename_sub0 in the explicit_template_type
5338 expansion. Just fail. */
5339 cp_error ("no class template named `%#T' in `%#T'",
5341 return error_mark_node
;
5344 if (! uses_template_parms (context
)
5345 || currently_open_class (context
))
5347 if (TREE_CODE (fullname
) == TEMPLATE_ID_EXPR
)
5349 tree tmpl
= NULL_TREE
;
5350 if (IS_AGGR_TYPE (context
))
5351 tmpl
= lookup_field (context
, name
, 0, 0);
5352 if (!tmpl
|| !DECL_CLASS_TEMPLATE_P (tmpl
))
5354 cp_error ("no class template named `%#T' in `%#T'",
5356 return error_mark_node
;
5359 return lookup_template_class (tmpl
,
5360 TREE_OPERAND (fullname
, 1),
5362 /*entering_scope=*/0);
5368 if (!IS_AGGR_TYPE (context
))
5370 cp_error ("no type named `%#T' in `%#T'", name
, context
);
5371 return error_mark_node
;
5374 t
= lookup_field (context
, name
, 0, 1);
5376 return TREE_TYPE (t
);
5380 /* If the CONTEXT is not a template type, then either the field is
5381 there now or its never going to be. */
5382 if (!uses_template_parms (context
))
5384 cp_error ("no type named `%#T' in `%#T'", name
, context
);
5385 return error_mark_node
;
5389 return build_typename_type (context
, name
, fullname
, NULL_TREE
);
5392 /* Select the right _DECL from multiple choices. */
5395 select_decl (binding
, flags
)
5400 val
= BINDING_VALUE (binding
);
5401 if (LOOKUP_NAMESPACES_ONLY (flags
))
5403 /* We are not interested in types. */
5404 if (val
&& TREE_CODE (val
) == NAMESPACE_DECL
)
5409 /* If we could have a type and
5410 we have nothing or we need a type and have none. */
5411 if (BINDING_TYPE (binding
)
5412 && (!val
|| ((flags
& LOOKUP_PREFER_TYPES
)
5413 && TREE_CODE (val
) != TYPE_DECL
)))
5414 val
= TYPE_STUB_DECL (BINDING_TYPE (binding
));
5415 /* Don't return non-types if we really prefer types. */
5416 else if (val
&& LOOKUP_TYPES_ONLY (flags
) && TREE_CODE (val
) != TYPE_DECL
5417 && (TREE_CODE (val
) != TEMPLATE_DECL
5418 || !DECL_CLASS_TEMPLATE_P (val
)))
5424 /* Unscoped lookup of a global: iterate over current namespaces,
5425 considering using-directives. If SPACESP is non-NULL, store a list
5426 of the namespaces we've considered in it. */
5429 unqualified_namespace_lookup (name
, flags
, spacesp
)
5434 tree b
= make_node (CPLUS_BINDING
);
5435 tree initial
= current_decl_namespace();
5436 tree scope
= initial
;
5438 struct binding_level
*level
;
5439 tree val
= NULL_TREE
;
5442 *spacesp
= NULL_TREE
;
5444 for (; !val
; scope
= CP_DECL_CONTEXT (scope
))
5447 *spacesp
= tree_cons (scope
, NULL_TREE
, *spacesp
);
5448 val
= binding_for_name (name
, scope
);
5450 /* Initialize binding for this context. */
5451 BINDING_VALUE (b
) = BINDING_VALUE (val
);
5452 BINDING_TYPE (b
) = BINDING_TYPE (val
);
5454 /* Add all _DECLs seen through local using-directives. */
5455 for (level
= current_binding_level
;
5456 !level
->namespace_p
;
5457 level
= level
->level_chain
)
5458 if (!lookup_using_namespace (name
, b
, level
->using_directives
,
5459 scope
, flags
, spacesp
))
5460 /* Give up because of error. */
5461 return error_mark_node
;
5463 /* Add all _DECLs seen through global using-directives. */
5464 /* XXX local and global using lists should work equally. */
5468 if (!lookup_using_namespace (name
, b
, DECL_NAMESPACE_USING (siter
),
5469 scope
, flags
, spacesp
))
5470 /* Give up because of error. */
5471 return error_mark_node
;
5472 if (siter
== scope
) break;
5473 siter
= CP_DECL_CONTEXT (siter
);
5476 val
= select_decl (b
, flags
);
5477 if (scope
== global_namespace
)
5483 /* Combine prefer_type and namespaces_only into flags. */
5486 lookup_flags (prefer_type
, namespaces_only
)
5487 int prefer_type
, namespaces_only
;
5489 if (namespaces_only
)
5490 return LOOKUP_PREFER_NAMESPACES
;
5491 if (prefer_type
> 1)
5492 return LOOKUP_PREFER_TYPES
;
5493 if (prefer_type
> 0)
5494 return LOOKUP_PREFER_BOTH
;
5498 /* Given a lookup that returned VAL, use FLAGS to decide if we want to
5499 ignore it or not. Subroutine of lookup_name_real. */
5502 qualify_lookup (val
, flags
)
5506 if (val
== NULL_TREE
)
5508 if ((flags
& LOOKUP_PREFER_NAMESPACES
) && TREE_CODE (val
) == NAMESPACE_DECL
)
5510 if ((flags
& LOOKUP_PREFER_TYPES
)
5511 && (TREE_CODE (val
) == TYPE_DECL
5512 || ((flags
& LOOKUP_TEMPLATES_EXPECTED
)
5513 && DECL_CLASS_TEMPLATE_P (val
))))
5515 if (flags
& (LOOKUP_PREFER_NAMESPACES
| LOOKUP_PREFER_TYPES
))
5520 /* Any other BINDING overrides an implicit TYPENAME. Warn about
5524 warn_about_implicit_typename_lookup (typename
, binding
)
5528 tree subtype
= TREE_TYPE (TREE_TYPE (typename
));
5529 tree name
= DECL_NAME (typename
);
5531 if (! (TREE_CODE (binding
) == TEMPLATE_DECL
5532 && CLASSTYPE_TEMPLATE_INFO (subtype
)
5533 && CLASSTYPE_TI_TEMPLATE (subtype
) == binding
)
5534 && ! (TREE_CODE (binding
) == TYPE_DECL
5535 && same_type_p (TREE_TYPE (binding
), subtype
)))
5537 cp_warning ("lookup of `%D' finds `%#D'",
5539 cp_warning (" instead of `%D' from dependent base class",
5541 cp_warning (" (use `typename %T::%D' if that's what you meant)",
5542 constructor_name (current_class_type
), name
);
5546 /* Look up NAME in the current binding level and its superiors in the
5547 namespace of variables, functions and typedefs. Return a ..._DECL
5548 node of some kind representing its definition if there is only one
5549 such declaration, or return a TREE_LIST with all the overloaded
5550 definitions if there are many, or return 0 if it is undefined.
5552 If PREFER_TYPE is > 0, we prefer TYPE_DECLs or namespaces.
5553 If PREFER_TYPE is > 1, we reject non-type decls (e.g. namespaces).
5554 If PREFER_TYPE is -2, we're being called from yylex(). (UGLY)
5555 Otherwise we prefer non-TYPE_DECLs.
5557 If NONCLASS is non-zero, we don't look for the NAME in class scope,
5558 using IDENTIFIER_CLASS_VALUE. */
5561 lookup_name_real (name
, prefer_type
, nonclass
, namespaces_only
)
5563 int prefer_type
, nonclass
, namespaces_only
;
5566 tree val
= NULL_TREE
;
5568 tree from_obj
= NULL_TREE
;
5570 int val_is_implicit_typename
= 0;
5572 /* Hack: copy flag set by parser, if set. */
5573 if (only_namespace_names
)
5574 namespaces_only
= 1;
5576 if (prefer_type
== -2)
5578 extern int looking_for_typename
;
5579 tree type
= NULL_TREE
;
5582 prefer_type
= looking_for_typename
;
5584 flags
= lookup_flags (prefer_type
, namespaces_only
);
5585 /* If the next thing is '<', class templates are types. */
5586 if (looking_for_template
)
5587 flags
|= LOOKUP_TEMPLATES_EXPECTED
;
5589 /* std:: becomes :: for now. */
5590 if (got_scope
== std_node
)
5591 got_scope
= void_type_node
;
5595 else if (got_object
!= error_mark_node
)
5600 if (type
== error_mark_node
)
5601 return error_mark_node
;
5602 if (TREE_CODE (type
) == TYPENAME_TYPE
&& TREE_TYPE (type
))
5603 type
= TREE_TYPE (type
);
5606 type
= complete_type (type
);
5608 if (TREE_CODE (type
) == VOID_TYPE
)
5609 type
= global_namespace
;
5610 if (TREE_CODE (type
) == NAMESPACE_DECL
)
5612 val
= make_node (CPLUS_BINDING
);
5613 flags
|= LOOKUP_COMPLAIN
;
5614 if (!qualified_lookup_using_namespace (name
, type
, val
, flags
))
5616 val
= select_decl (val
, flags
);
5618 else if (! IS_AGGR_TYPE (type
)
5619 || TREE_CODE (type
) == TEMPLATE_TYPE_PARM
5620 || TREE_CODE (type
) == TEMPLATE_TEMPLATE_PARM
5621 || TREE_CODE (type
) == TYPENAME_TYPE
)
5622 /* Someone else will give an error about this if needed. */
5624 else if (type
== current_class_type
)
5625 val
= IDENTIFIER_CLASS_VALUE (name
);
5627 val
= lookup_member (type
, name
, 0, prefer_type
);
5634 else if (got_object
&& val
)
5639 flags
= lookup_flags (prefer_type
, namespaces_only
);
5640 /* If we're not parsing, we need to complain. */
5641 flags
|= LOOKUP_COMPLAIN
;
5644 /* First, look in non-namespace scopes. */
5646 if (current_class_type
== NULL_TREE
)
5649 for (t
= IDENTIFIER_BINDING (name
); t
; t
= TREE_CHAIN (t
))
5653 if (!LOCAL_BINDING_P (t
) && nonclass
)
5654 /* We're not looking for class-scoped bindings, so keep going. */
5657 /* If this is the kind of thing we're looking for, we're done. */
5658 if (qualify_lookup (BINDING_VALUE (t
), flags
))
5659 binding
= BINDING_VALUE (t
);
5660 else if ((flags
& LOOKUP_PREFER_TYPES
)
5661 && qualify_lookup (BINDING_TYPE (t
), flags
))
5662 binding
= BINDING_TYPE (t
);
5664 binding
= NULL_TREE
;
5667 && (!val
|| !IMPLICIT_TYPENAME_TYPE_DECL_P (binding
)))
5669 if (val_is_implicit_typename
&& !yylex
)
5670 warn_about_implicit_typename_lookup (val
, binding
);
5672 val_is_implicit_typename
5673 = IMPLICIT_TYPENAME_TYPE_DECL_P (val
);
5674 if (!val_is_implicit_typename
)
5679 /* Now lookup in namespace scopes. */
5680 if (!val
|| val_is_implicit_typename
)
5682 t
= unqualified_namespace_lookup (name
, flags
, 0);
5685 if (val_is_implicit_typename
&& !yylex
)
5686 warn_about_implicit_typename_lookup (val
, t
);
5694 /* This should only warn about types used in qualified-ids. */
5695 if (from_obj
&& from_obj
!= val
)
5697 if (looking_for_typename
&& TREE_CODE (from_obj
) == TYPE_DECL
5698 && TREE_CODE (val
) == TYPE_DECL
5699 && TREE_TYPE (from_obj
) != TREE_TYPE (val
))
5701 cp_pedwarn ("lookup of `%D' in the scope of `%#T' (`%#T')",
5702 name
, got_object
, TREE_TYPE (from_obj
));
5703 cp_pedwarn (" does not match lookup in the current scope (`%#T')",
5707 /* We don't change val to from_obj if got_object depends on
5708 template parms because that breaks implicit typename for
5709 destructor calls. */
5710 if (! uses_template_parms (got_object
))
5714 /* If we have a single function from a using decl, pull it out. */
5715 if (TREE_CODE (val
) == OVERLOAD
&& ! really_overloaded_fn (val
))
5716 val
= OVL_FUNCTION (val
);
5725 lookup_name_nonclass (name
)
5728 return lookup_name_real (name
, 0, 1, 0);
5732 lookup_function_nonclass (name
, args
)
5736 return lookup_arg_dependent (name
, lookup_name_nonclass (name
), args
);
5740 lookup_name_namespace_only (name
)
5743 /* type-or-namespace, nonclass, namespace_only */
5744 return lookup_name_real (name
, 1, 1, 1);
5748 lookup_name (name
, prefer_type
)
5752 return lookup_name_real (name
, prefer_type
, 0, 0);
5755 /* Similar to `lookup_name' but look only in the innermost non-class
5759 lookup_name_current_level (name
)
5762 struct binding_level
*b
;
5765 b
= current_binding_level
;
5766 while (b
->parm_flag
== 2)
5771 t
= IDENTIFIER_NAMESPACE_VALUE (name
);
5773 /* extern "C" function() */
5774 if (t
!= NULL_TREE
&& TREE_CODE (t
) == TREE_LIST
)
5777 else if (IDENTIFIER_BINDING (name
)
5778 && LOCAL_BINDING_P (IDENTIFIER_BINDING (name
)))
5782 if (BINDING_LEVEL (IDENTIFIER_BINDING (name
)) == b
)
5783 return IDENTIFIER_VALUE (name
);
5795 /* Like lookup_name_current_level, but for types. */
5798 lookup_type_current_level (name
)
5801 register tree t
= NULL_TREE
;
5803 my_friendly_assert (! current_binding_level
->namespace_p
, 980716);
5805 if (REAL_IDENTIFIER_TYPE_VALUE (name
) != NULL_TREE
5806 && REAL_IDENTIFIER_TYPE_VALUE (name
) != global_type_node
)
5808 struct binding_level
*b
= current_binding_level
;
5811 if (purpose_member (name
, b
->type_shadowed
))
5812 return REAL_IDENTIFIER_TYPE_VALUE (name
);
5824 begin_only_namespace_names ()
5826 only_namespace_names
= 1;
5830 end_only_namespace_names ()
5832 only_namespace_names
= 0;
5835 /* Arrange for the user to get a source line number, even when the
5836 compiler is going down in flames, so that she at least has a
5837 chance of working around problems in the compiler. We used to
5838 call error(), but that let the segmentation fault continue
5839 through; now, it's much more passive by asking them to send the
5840 maintainers mail about the problem. */
5844 int sig ATTRIBUTE_UNUSED
;
5846 signal (SIGSEGV
, SIG_DFL
);
5848 signal (SIGIOT
, SIG_DFL
);
5851 signal (SIGILL
, SIG_DFL
);
5854 signal (SIGABRT
, SIG_DFL
);
5857 signal (SIGBUS
, SIG_DFL
);
5859 my_friendly_abort (0);
5862 /* Push the declarations of builtin types into the namespace.
5863 RID_INDEX, if < RID_MAX is the index of the builtin type
5864 in the array RID_POINTERS. NAME is the name used when looking
5865 up the builtin type. TYPE is the _TYPE node for the builtin type. */
5868 record_builtin_type (rid_index
, name
, type
)
5873 tree rname
= NULL_TREE
, tname
= NULL_TREE
;
5874 tree tdecl
= NULL_TREE
;
5876 if ((int) rid_index
< (int) RID_MAX
)
5877 rname
= ridpointers
[(int) rid_index
];
5879 tname
= get_identifier (name
);
5881 TYPE_BUILT_IN (type
) = 1;
5885 tdecl
= pushdecl (build_decl (TYPE_DECL
, tname
, type
));
5886 set_identifier_type_value (tname
, NULL_TREE
);
5887 if ((int) rid_index
< (int) RID_MAX
)
5888 /* Built-in types live in the global namespace. */
5889 SET_IDENTIFIER_GLOBAL_VALUE (tname
, tdecl
);
5891 if (rname
!= NULL_TREE
)
5893 if (tname
!= NULL_TREE
)
5895 set_identifier_type_value (rname
, NULL_TREE
);
5896 SET_IDENTIFIER_GLOBAL_VALUE (rname
, tdecl
);
5900 tdecl
= pushdecl (build_decl (TYPE_DECL
, rname
, type
));
5901 set_identifier_type_value (rname
, NULL_TREE
);
5906 /* Record one of the standard Java types.
5907 * Declare it as having the given NAME.
5908 * If SIZE > 0, it is the size of one of the integral types;
5909 * otherwise it is the negative of the size of one of the other types. */
5912 record_builtin_java_type (name
, size
)
5918 type
= make_signed_type (size
);
5919 else if (size
> -32)
5920 { /* "__java_char" or ""__java_boolean". */
5921 type
= make_unsigned_type (-size
);
5922 /*if (size == -1) TREE_SET_CODE (type, BOOLEAN_TYPE);*/
5925 { /* "__java_float" or ""__java_double". */
5926 type
= make_node (REAL_TYPE
);
5927 TYPE_PRECISION (type
) = - size
;
5930 record_builtin_type (RID_MAX
, name
, type
);
5931 decl
= TYPE_NAME (type
);
5933 /* Suppress generate debug symbol entries for these types,
5934 since for normal C++ they are just clutter.
5935 However, push_lang_context undoes this if extern "Java" is seen. */
5936 DECL_IGNORED_P (decl
) = 1;
5938 TYPE_FOR_JAVA (type
) = 1;
5942 /* Push a type into the namespace so that the back-ends ignore it. */
5945 record_unknown_type (type
, name
)
5949 tree decl
= pushdecl (build_decl (TYPE_DECL
, get_identifier (name
), type
));
5950 /* Make sure the "unknown type" typedecl gets ignored for debug info. */
5951 DECL_IGNORED_P (decl
) = 1;
5952 TYPE_DECL_SUPPRESS_DEBUG (decl
) = 1;
5953 TYPE_SIZE (type
) = TYPE_SIZE (void_type_node
);
5954 TYPE_ALIGN (type
) = 1;
5955 TYPE_MODE (type
) = TYPE_MODE (void_type_node
);
5958 /* Push overloaded decl, in global scope, with one argument so it
5959 can be used as a callback from define_function. */
5962 push_overloaded_decl_1 (x
)
5965 push_overloaded_decl (x
, PUSH_GLOBAL
);
5972 auto_function (name
, type
)
5975 return define_function
5976 (IDENTIFIER_POINTER (name
), type
, push_overloaded_decl_1
,
5977 IDENTIFIER_POINTER (build_decl_overload (name
, TYPE_ARG_TYPES (type
),
5981 /* Create the predefined scalar types of C,
5982 and some nodes representing standard constants (0, 1, (void *)0).
5983 Initialize the global binding level.
5984 Make definitions for built-in primitive functions. */
5987 init_decl_processing ()
5990 int wchar_type_size
;
5991 tree array_domain_type
;
5993 /* Have to make these distinct before we try using them. */
5994 lang_name_cplusplus
= get_identifier ("C++");
5995 lang_name_c
= get_identifier ("C");
5996 lang_name_java
= get_identifier ("Java");
5998 /* Let the back-end now how to save and restore language-specific
5999 per-function globals. */
6000 init_lang_status
= &push_cp_function_context
;
6001 free_lang_status
= &pop_cp_function_context
;
6002 mark_lang_status
= &mark_cp_function_context
;
6008 /* Create the global variables. */
6009 push_to_top_level ();
6011 /* Enter the global namespace. */
6012 my_friendly_assert (global_namespace
== NULL_TREE
, 375);
6013 push_namespace (get_identifier ("::"));
6014 global_namespace
= current_namespace
;
6015 current_lang_name
= NULL_TREE
;
6017 if (flag_strict_prototype
== 2)
6018 flag_strict_prototype
= pedantic
;
6019 if (! flag_permissive
&& ! pedantic
)
6020 flag_pedantic_errors
= 1;
6022 strict_prototypes_lang_c
= flag_strict_prototype
;
6025 current_lang_name
= lang_name_c
;
6027 current_function_decl
= NULL_TREE
;
6028 current_binding_level
= NULL_BINDING_LEVEL
;
6029 free_binding_level
= NULL_BINDING_LEVEL
;
6031 /* Because most segmentation signals can be traced back into user
6032 code, catch them and at least give the user a chance of working
6033 around compiler bugs. */
6034 signal (SIGSEGV
, signal_catch
);
6036 /* We will also catch aborts in the back-end through signal_catch and
6037 give the user a chance to see where the error might be, and to defeat
6038 aborts in the back-end when there have been errors previously in their
6041 signal (SIGIOT
, signal_catch
);
6044 signal (SIGILL
, signal_catch
);
6047 signal (SIGABRT
, signal_catch
);
6050 signal (SIGBUS
, signal_catch
);
6053 build_common_tree_nodes (flag_signed_char
);
6055 error_mark_list
= build_tree_list (error_mark_node
, error_mark_node
);
6056 TREE_TYPE (error_mark_list
) = error_mark_node
;
6058 /* Make the binding_level structure for global names. */
6060 global_binding_level
= current_binding_level
;
6061 /* The global level is the namespace level of ::. */
6062 NAMESPACE_LEVEL (global_namespace
) = global_binding_level
;
6063 declare_namespace_level ();
6065 this_identifier
= get_identifier (THIS_NAME
);
6066 in_charge_identifier
= get_identifier (IN_CHARGE_NAME
);
6067 ctor_identifier
= get_identifier (CTOR_NAME
);
6068 dtor_identifier
= get_identifier (DTOR_NAME
);
6069 pfn_identifier
= get_identifier (VTABLE_PFN_NAME
);
6070 index_identifier
= get_identifier (VTABLE_INDEX_NAME
);
6071 delta_identifier
= get_identifier (VTABLE_DELTA_NAME
);
6072 delta2_identifier
= get_identifier (VTABLE_DELTA2_NAME
);
6073 pfn_or_delta2_identifier
= get_identifier ("__pfn_or_delta2");
6075 /* Define `int' and `char' first so that dbx will output them first. */
6076 record_builtin_type (RID_INT
, NULL_PTR
, integer_type_node
);
6077 record_builtin_type (RID_CHAR
, "char", char_type_node
);
6079 /* `signed' is the same as `int' */
6080 record_builtin_type (RID_SIGNED
, NULL_PTR
, integer_type_node
);
6081 record_builtin_type (RID_LONG
, "long int", long_integer_type_node
);
6082 record_builtin_type (RID_UNSIGNED
, "unsigned int", unsigned_type_node
);
6083 record_builtin_type (RID_MAX
, "long unsigned int", long_unsigned_type_node
);
6084 record_builtin_type (RID_MAX
, "unsigned long", long_unsigned_type_node
);
6085 record_builtin_type (RID_MAX
, "long long int", long_long_integer_type_node
);
6086 record_builtin_type (RID_MAX
, "long long unsigned int",
6087 long_long_unsigned_type_node
);
6088 record_builtin_type (RID_MAX
, "long long unsigned",
6089 long_long_unsigned_type_node
);
6090 record_builtin_type (RID_SHORT
, "short int", short_integer_type_node
);
6091 record_builtin_type (RID_MAX
, "short unsigned int", short_unsigned_type_node
);
6092 record_builtin_type (RID_MAX
, "unsigned short", short_unsigned_type_node
);
6095 = TREE_TYPE (IDENTIFIER_GLOBAL_VALUE (get_identifier (PTRDIFF_TYPE
)));
6097 /* Define both `signed char' and `unsigned char'. */
6098 record_builtin_type (RID_MAX
, "signed char", signed_char_type_node
);
6099 record_builtin_type (RID_MAX
, "unsigned char", unsigned_char_type_node
);
6101 /* `unsigned long' is the standard type for sizeof.
6102 Note that stddef.h uses `unsigned long',
6103 and this must agree, even if long and int are the same size. */
6105 (TREE_TYPE (IDENTIFIER_GLOBAL_VALUE (get_identifier (SIZE_TYPE
))));
6107 /* Create the widest literal types. */
6108 widest_integer_literal_type_node
= make_signed_type (HOST_BITS_PER_WIDE_INT
* 2);
6109 pushdecl (build_decl (TYPE_DECL
, NULL_TREE
,
6110 widest_integer_literal_type_node
));
6112 widest_unsigned_literal_type_node
= make_unsigned_type (HOST_BITS_PER_WIDE_INT
* 2);
6113 pushdecl (build_decl (TYPE_DECL
, NULL_TREE
,
6114 widest_unsigned_literal_type_node
));
6116 /* These are types that type_for_size and type_for_mode use. */
6117 pushdecl (build_decl (TYPE_DECL
, NULL_TREE
, intQI_type_node
));
6118 pushdecl (build_decl (TYPE_DECL
, NULL_TREE
, intHI_type_node
));
6119 pushdecl (build_decl (TYPE_DECL
, NULL_TREE
, intSI_type_node
));
6120 pushdecl (build_decl (TYPE_DECL
, NULL_TREE
, intDI_type_node
));
6121 #if HOST_BITS_PER_WIDE_INT >= 64
6122 pushdecl (build_decl (TYPE_DECL
, get_identifier ("__int128_t"), intTI_type_node
));
6124 pushdecl (build_decl (TYPE_DECL
, NULL_TREE
, unsigned_intQI_type_node
));
6125 pushdecl (build_decl (TYPE_DECL
, NULL_TREE
, unsigned_intHI_type_node
));
6126 pushdecl (build_decl (TYPE_DECL
, NULL_TREE
, unsigned_intSI_type_node
));
6127 pushdecl (build_decl (TYPE_DECL
, NULL_TREE
, unsigned_intDI_type_node
));
6128 #if HOST_BITS_PER_WIDE_INT >= 64
6129 pushdecl (build_decl (TYPE_DECL
, get_identifier ("__uint128_t"), unsigned_intTI_type_node
));
6132 build_common_tree_nodes_2 (flag_short_double
);
6134 java_byte_type_node
= record_builtin_java_type ("__java_byte", 8);
6135 java_short_type_node
= record_builtin_java_type ("__java_short", 16);
6136 java_int_type_node
= record_builtin_java_type ("__java_int", 32);
6137 java_long_type_node
= record_builtin_java_type ("__java_long", 64);
6138 java_float_type_node
= record_builtin_java_type ("__java_float", -32);
6139 java_double_type_node
= record_builtin_java_type ("__java_double", -64);
6140 java_char_type_node
= record_builtin_java_type ("__java_char", -16);
6141 java_boolean_type_node
= record_builtin_java_type ("__java_boolean", -1);
6143 integer_two_node
= build_int_2 (2, 0);
6144 TREE_TYPE (integer_two_node
) = integer_type_node
;
6145 integer_three_node
= build_int_2 (3, 0);
6146 TREE_TYPE (integer_three_node
) = integer_type_node
;
6148 boolean_type_node
= make_unsigned_type (BOOL_TYPE_SIZE
);
6149 TREE_SET_CODE (boolean_type_node
, BOOLEAN_TYPE
);
6150 TYPE_MAX_VALUE (boolean_type_node
) = build_int_2 (1, 0);
6151 TREE_TYPE (TYPE_MAX_VALUE (boolean_type_node
)) = boolean_type_node
;
6152 TYPE_PRECISION (boolean_type_node
) = 1;
6153 record_builtin_type (RID_BOOL
, "bool", boolean_type_node
);
6154 boolean_false_node
= build_int_2 (0, 0);
6155 TREE_TYPE (boolean_false_node
) = boolean_type_node
;
6156 boolean_true_node
= build_int_2 (1, 0);
6157 TREE_TYPE (boolean_true_node
) = boolean_type_node
;
6159 signed_size_zero_node
= build_int_2 (0, 0); record_builtin_type (RID_FLOAT
, NULL_PTR
, float_type_node
);
6160 record_builtin_type (RID_DOUBLE
, NULL_PTR
, double_type_node
);
6161 record_builtin_type (RID_MAX
, "long double", long_double_type_node
);
6163 pushdecl (build_decl (TYPE_DECL
, get_identifier ("complex int"),
6164 complex_integer_type_node
));
6165 pushdecl (build_decl (TYPE_DECL
, get_identifier ("complex float"),
6166 complex_float_type_node
));
6167 pushdecl (build_decl (TYPE_DECL
, get_identifier ("complex double"),
6168 complex_double_type_node
));
6169 pushdecl (build_decl (TYPE_DECL
, get_identifier ("complex long double"),
6170 complex_long_double_type_node
));
6172 TREE_TYPE (signed_size_zero_node
) = make_signed_type (TYPE_PRECISION (sizetype
));
6174 record_builtin_type (RID_VOID
, NULL_PTR
, void_type_node
);
6175 void_list_node
= build_tree_list (NULL_TREE
, void_type_node
);
6176 TREE_PARMLIST (void_list_node
) = 1;
6178 /* Used for expressions that do nothing, but are not errors. */
6179 void_zero_node
= build_int_2 (0, 0);
6180 TREE_TYPE (void_zero_node
) = void_type_node
;
6182 string_type_node
= build_pointer_type (char_type_node
);
6183 const_string_type_node
6184 = build_pointer_type (build_qualified_type (char_type_node
,
6186 empty_except_spec
= build_tree_list (NULL_TREE
, NULL_TREE
);
6188 record_builtin_type (RID_MAX
, NULL_PTR
, string_type_node
);
6191 /* Make a type to be the domain of a few array types
6192 whose domains don't really matter.
6193 200 is small enough that it always fits in size_t
6194 and large enough that it can hold most function names for the
6195 initializations of __FUNCTION__ and __PRETTY_FUNCTION__. */
6196 array_domain_type
= build_index_type (build_int_2 (200, 0));
6198 /* Make a type for arrays of characters.
6199 With luck nothing will ever really depend on the length of this
6201 char_array_type_node
6202 = build_array_type (char_type_node
, array_domain_type
);
6203 /* Likewise for arrays of ints. */
6205 = build_array_type (integer_type_node
, array_domain_type
);
6207 /* This is just some anonymous class type. Nobody should ever
6208 need to look inside this envelope. */
6209 class_star_type_node
= build_pointer_type (make_lang_type (RECORD_TYPE
));
6211 if (flag_huge_objects
)
6212 delta_type_node
= long_integer_type_node
;
6214 delta_type_node
= short_integer_type_node
;
6216 default_function_type
6217 = build_function_type (integer_type_node
, NULL_TREE
);
6219 ptr_type_node
= build_pointer_type (void_type_node
);
6221 = build_pointer_type (build_qualified_type (void_type_node
,
6223 c_common_nodes_and_builtins (1, flag_no_builtin
, flag_no_nonansi_builtin
);
6224 lang_type_promotes_to
= convert_type_from_ellipsis
;
6227 = build_exception_variant (void_ftype_ptr
, empty_except_spec
);
6229 /* C++ extensions */
6231 unknown_type_node
= make_node (UNKNOWN_TYPE
);
6232 record_unknown_type (unknown_type_node
, "unknown type");
6234 /* Indirecting an UNKNOWN_TYPE node yields an UNKNOWN_TYPE node. */
6235 TREE_TYPE (unknown_type_node
) = unknown_type_node
;
6237 TREE_TYPE (null_node
) = type_for_size (POINTER_SIZE
, 0);
6239 /* Looking up TYPE_POINTER_TO and TYPE_REFERENCE_TO yield the same
6241 TYPE_POINTER_TO (unknown_type_node
) = unknown_type_node
;
6242 TYPE_REFERENCE_TO (unknown_type_node
) = unknown_type_node
;
6244 /* This is special for C++ so functions can be overloaded. */
6245 wchar_type_node
= get_identifier (flag_short_wchar
6246 ? "short unsigned int"
6248 wchar_type_node
= TREE_TYPE (IDENTIFIER_GLOBAL_VALUE (wchar_type_node
));
6249 wchar_type_size
= TYPE_PRECISION (wchar_type_node
);
6250 signed_wchar_type_node
= make_signed_type (wchar_type_size
);
6251 unsigned_wchar_type_node
= make_unsigned_type (wchar_type_size
);
6253 = TREE_UNSIGNED (wchar_type_node
)
6254 ? unsigned_wchar_type_node
6255 : signed_wchar_type_node
;
6256 record_builtin_type (RID_WCHAR
, "__wchar_t", wchar_type_node
);
6258 /* Artificial declaration of wchar_t -- can be bashed */
6259 wchar_decl_node
= build_decl (TYPE_DECL
, get_identifier ("wchar_t"),
6261 pushdecl (wchar_decl_node
);
6263 /* This is for wide string constants. */
6264 wchar_array_type_node
6265 = build_array_type (wchar_type_node
, array_domain_type
);
6267 if (flag_vtable_thunks
)
6269 /* Make sure we get a unique function type, so we can give
6270 its pointer type a name. (This wins for gdb.) */
6271 tree vfunc_type
= make_node (FUNCTION_TYPE
);
6272 TREE_TYPE (vfunc_type
) = integer_type_node
;
6273 TYPE_ARG_TYPES (vfunc_type
) = NULL_TREE
;
6274 layout_type (vfunc_type
);
6276 vtable_entry_type
= build_pointer_type (vfunc_type
);
6280 vtable_entry_type
= make_lang_type (RECORD_TYPE
);
6281 fields
[0] = build_lang_decl (FIELD_DECL
, delta_identifier
,
6283 fields
[1] = build_lang_decl (FIELD_DECL
, index_identifier
,
6285 fields
[2] = build_lang_decl (FIELD_DECL
, pfn_identifier
,
6287 finish_builtin_type (vtable_entry_type
, VTBL_PTR_TYPE
, fields
, 2,
6290 /* Make this part of an invisible union. */
6291 fields
[3] = copy_node (fields
[2]);
6292 TREE_TYPE (fields
[3]) = delta_type_node
;
6293 DECL_NAME (fields
[3]) = delta2_identifier
;
6294 DECL_MODE (fields
[3]) = TYPE_MODE (delta_type_node
);
6295 DECL_SIZE (fields
[3]) = TYPE_SIZE (delta_type_node
);
6296 TREE_UNSIGNED (fields
[3]) = 0;
6297 TREE_CHAIN (fields
[2]) = fields
[3];
6298 vtable_entry_type
= build_qualified_type (vtable_entry_type
,
6301 record_builtin_type (RID_MAX
, VTBL_PTR_TYPE
, vtable_entry_type
);
6304 = build_cplus_array_type (vtable_entry_type
, NULL_TREE
);
6305 layout_type (vtbl_type_node
);
6306 vtbl_type_node
= build_qualified_type (vtbl_type_node
, TYPE_QUAL_CONST
);
6307 record_builtin_type (RID_MAX
, NULL_PTR
, vtbl_type_node
);
6308 vtbl_ptr_type_node
= build_pointer_type (vtable_entry_type
);
6309 layout_type (vtbl_ptr_type_node
);
6310 record_builtin_type (RID_MAX
, NULL_PTR
, vtbl_ptr_type_node
);
6312 std_node
= build_decl (NAMESPACE_DECL
,
6313 get_identifier (flag_honor_std
? "fake std":"std"),
6315 pushdecl (std_node
);
6317 global_type_node
= make_node (LANG_TYPE
);
6318 record_unknown_type (global_type_node
, "global type");
6321 current_lang_name
= lang_name_cplusplus
;
6324 tree bad_alloc_type_node
, newtype
, deltype
;
6326 push_namespace (get_identifier ("std"));
6327 bad_alloc_type_node
= xref_tag
6328 (class_type_node
, get_identifier ("bad_alloc"), 1);
6331 newtype
= build_exception_variant
6332 (ptr_ftype_sizetype
, add_exception_specifier (NULL_TREE
, bad_alloc_type_node
, -1));
6333 deltype
= build_exception_variant (void_ftype_ptr
, empty_except_spec
);
6334 auto_function (ansi_opname
[(int) NEW_EXPR
], newtype
);
6335 auto_function (ansi_opname
[(int) VEC_NEW_EXPR
], newtype
);
6336 global_delete_fndecl
= auto_function (ansi_opname
[(int) DELETE_EXPR
],
6338 auto_function (ansi_opname
[(int) VEC_DELETE_EXPR
], deltype
);
6342 = define_function ("__pure_virtual", void_ftype
, 0, 0);
6344 /* Perform other language dependent initializations. */
6345 init_class_processing ();
6346 init_init_processing ();
6347 init_search_processing ();
6348 init_rtti_processing ();
6350 if (flag_exceptions
)
6351 init_exception_processing ();
6354 flag_inline_functions
= 0;
6357 if (! supports_one_only ())
6360 /* Create the global bindings for __FUNCTION__ and __PRETTY_FUNCTION__. */
6361 declare_function_name ();
6363 /* Prepare to check format strings against argument lists. */
6364 init_function_format_info ();
6366 /* Show we use EH for cleanups. */
6367 using_eh_for_cleanups ();
6369 print_error_function
= lang_print_error_function
;
6370 lang_get_alias_set
= &c_get_alias_set
;
6371 valid_lang_attribute
= cp_valid_lang_attribute
;
6373 /* Maintain consistency. Perhaps we should just complain if they
6374 say -fwritable-strings? */
6375 if (flag_writable_strings
)
6376 flag_const_strings
= 0;
6378 /* Add GC roots for all of our global variables. */
6379 ggc_add_tree_root (c_global_trees
, sizeof c_global_trees
/ sizeof(tree
));
6380 ggc_add_tree_root (cp_global_trees
, sizeof cp_global_trees
/ sizeof(tree
));
6381 ggc_add_tree_root (&integer_three_node
, 1);
6382 ggc_add_tree_root (&integer_two_node
, 1);
6383 ggc_add_tree_root (&signed_size_zero_node
, 1);
6384 ggc_add_tree_root (&size_one_node
, 1);
6385 ggc_add_tree_root (&size_zero_node
, 1);
6386 ggc_add_root (&global_binding_level
, 1, sizeof global_binding_level
,
6387 mark_binding_level
);
6388 ggc_add_root (&scope_chain
, 1, sizeof scope_chain
, &mark_saved_scope
);
6389 ggc_add_tree_root (&static_ctors
, 1);
6390 ggc_add_tree_root (&static_dtors
, 1);
6391 ggc_add_tree_root (&lastiddecl
, 1);
6393 ggc_add_tree_root (&enum_next_value
, 1);
6394 ggc_add_tree_root (&last_function_parm_tags
, 1);
6395 ggc_add_tree_root (¤t_function_return_value
, 1);
6396 ggc_add_tree_root (¤t_function_parms
, 1);
6397 ggc_add_tree_root (¤t_function_parm_tags
, 1);
6398 ggc_add_tree_root (&last_function_parms
, 1);
6399 ggc_add_tree_root (&error_mark_list
, 1);
6401 ggc_add_tree_root (&global_namespace
, 1);
6402 ggc_add_tree_root (&global_type_node
, 1);
6403 ggc_add_tree_root (&anonymous_namespace_name
, 1);
6405 ggc_add_tree_root (&got_object
, 1);
6406 ggc_add_tree_root (&got_scope
, 1);
6408 ggc_add_tree_root (¤t_lang_name
, 1);
6409 ggc_add_tree_root (&static_aggregates
, 1);
6412 /* Function to print any language-specific context for an error message. */
6415 lang_print_error_function (file
)
6418 default_print_error_function (file
);
6419 maybe_print_template_context ();
6422 /* Make a definition for a builtin function named NAME and whose data type
6423 is TYPE. TYPE should be a function type with argument types.
6425 If LIBRARY_NAME is nonzero, use that for DECL_ASSEMBLER_NAME,
6426 the name to be called if we can't opencode the function. */
6429 define_function (name
, type
, pfn
, library_name
)
6432 void (*pfn
) PROTO((tree
));
6433 const char *library_name
;
6435 tree decl
= build_lang_decl (FUNCTION_DECL
, get_identifier (name
), type
);
6436 DECL_EXTERNAL (decl
) = 1;
6437 TREE_PUBLIC (decl
) = 1;
6438 DECL_ARTIFICIAL (decl
) = 1;
6440 my_friendly_assert (DECL_CONTEXT (decl
) == NULL_TREE
, 392);
6441 DECL_CONTEXT (decl
) = FROB_CONTEXT (current_namespace
);
6443 /* Since `pushdecl' relies on DECL_ASSEMBLER_NAME instead of DECL_NAME,
6444 we cannot change DECL_ASSEMBLER_NAME until we have installed this
6445 function in the namespace. */
6446 if (pfn
) (*pfn
) (decl
);
6448 DECL_ASSEMBLER_NAME (decl
) = get_identifier (library_name
);
6449 make_function_rtl (decl
);
6454 /* Wrapper around define_function, for the benefit of
6455 c_common_nodes_and_builtins.
6456 FUNCTION_CODE tells later passes how to compile calls to this function.
6457 See tree.h for its possible values. */
6460 builtin_function (name
, type
, code
, class, libname
)
6464 enum built_in_class
class;
6465 const char *libname
;
6467 tree decl
= define_function (name
, type
, (void (*) PROTO((tree
)))pushdecl
,
6469 DECL_BUILT_IN_CLASS (decl
) = class;
6470 DECL_FUNCTION_CODE (decl
) = code
;
6474 /* When we call finish_struct for an anonymous union, we create
6475 default copy constructors and such. But, an anonymous union
6476 shouldn't have such things; this function undoes the damage to the
6477 anonymous union type T.
6479 (The reason that we create the synthesized methods is that we don't
6480 distinguish `union { int i; }' from `typedef union { int i; } U'.
6481 The first is an anonymous union; the second is just an ordinary
6485 fixup_anonymous_aggr (t
)
6490 /* Wipe out memory of synthesized methods */
6491 TYPE_HAS_CONSTRUCTOR (t
) = 0;
6492 TYPE_HAS_DEFAULT_CONSTRUCTOR (t
) = 0;
6493 TYPE_HAS_INIT_REF (t
) = 0;
6494 TYPE_HAS_CONST_INIT_REF (t
) = 0;
6495 TYPE_HAS_ASSIGN_REF (t
) = 0;
6496 TYPE_HAS_CONST_ASSIGN_REF (t
) = 0;
6498 /* Splice the implicitly generated functions out of the TYPE_METHODS
6500 q
= &TYPE_METHODS (t
);
6503 if (DECL_ARTIFICIAL (*q
))
6504 *q
= TREE_CHAIN (*q
);
6506 q
= &TREE_CHAIN (*q
);
6509 /* ANSI C++ June 5 1992 WP 9.5.3. Anonymous unions may not have
6510 function members. */
6511 if (TYPE_METHODS (t
))
6512 error ("an anonymous union cannot have function members");
6515 /* Make sure that a declaration with no declarator is well-formed, i.e.
6516 just defines a tagged type or anonymous union.
6518 Returns the type defined, if any. */
6521 check_tag_decl (declspecs
)
6525 tree ob_modifier
= NULL_TREE
;
6527 register tree t
= NULL_TREE
;
6529 for (link
= declspecs
; link
; link
= TREE_CHAIN (link
))
6531 register tree value
= TREE_VALUE (link
);
6537 if (IS_AGGR_TYPE (value
) || TREE_CODE (value
) == ENUMERAL_TYPE
)
6539 my_friendly_assert (TYPE_MAIN_DECL (value
) != NULL_TREE
, 261);
6543 else if (value
== ridpointers
[(int) RID_FRIEND
])
6545 if (current_class_type
== NULL_TREE
6546 || current_scope () != current_class_type
)
6547 ob_modifier
= value
;
6549 else if (value
== ridpointers
[(int) RID_STATIC
]
6550 || value
== ridpointers
[(int) RID_EXTERN
]
6551 || value
== ridpointers
[(int) RID_AUTO
]
6552 || value
== ridpointers
[(int) RID_REGISTER
]
6553 || value
== ridpointers
[(int) RID_INLINE
]
6554 || value
== ridpointers
[(int) RID_VIRTUAL
]
6555 || value
== ridpointers
[(int) RID_CONST
]
6556 || value
== ridpointers
[(int) RID_VOLATILE
]
6557 || value
== ridpointers
[(int) RID_EXPLICIT
])
6558 ob_modifier
= value
;
6562 error ("multiple types in one declaration");
6564 /* Inside a class, we might be in a friend or access declaration.
6565 Until we have a good way of detecting the latter, don't warn. */
6566 if (t
== NULL_TREE
&& ! current_class_type
)
6567 pedwarn ("declaration does not declare anything");
6569 /* Check for an anonymous union. We're careful
6570 accessing TYPE_IDENTIFIER because some built-in types, like
6571 pointer-to-member types, do not have TYPE_NAME. */
6572 else if (t
&& IS_AGGR_TYPE_CODE (TREE_CODE (t
))
6574 && ANON_AGGRNAME_P (TYPE_IDENTIFIER (t
)))
6576 /* Anonymous unions are objects, so they can have specifiers. */;
6577 SET_ANON_AGGR_TYPE_P (t
);
6579 if (TREE_CODE (t
) != UNION_TYPE
&& pedantic
&& ! in_system_header
)
6580 pedwarn ("ISO C++ prohibits anonymous structs");
6583 else if (ob_modifier
)
6585 if (ob_modifier
== ridpointers
[(int) RID_INLINE
]
6586 || ob_modifier
== ridpointers
[(int) RID_VIRTUAL
])
6587 cp_error ("`%D' can only be specified for functions", ob_modifier
);
6588 else if (ob_modifier
== ridpointers
[(int) RID_FRIEND
])
6589 cp_error ("`%D' can only be specified inside a class", ob_modifier
);
6590 else if (ob_modifier
== ridpointers
[(int) RID_EXPLICIT
])
6591 cp_error ("`%D' can only be specified for constructors",
6594 cp_error ("`%D' can only be specified for objects and functions",
6601 /* Called when a declaration is seen that contains no names to declare.
6602 If its type is a reference to a structure, union or enum inherited
6603 from a containing scope, shadow that tag name for the current scope
6604 with a forward reference.
6605 If its type defines a new named structure or union
6606 or defines an enum, it is valid but we need not do anything here.
6607 Otherwise, it is an error.
6609 C++: may have to grok the declspecs to learn about static,
6610 complain for anonymous unions. */
6613 shadow_tag (declspecs
)
6616 tree t
= check_tag_decl (declspecs
);
6619 maybe_process_partial_specialization (t
);
6621 /* This is where the variables in an anonymous union are
6622 declared. An anonymous union declaration looks like:
6624 because there is no declarator after the union, the parser
6625 sends that declaration here. */
6626 if (t
&& ANON_AGGR_TYPE_P (t
))
6628 fixup_anonymous_aggr (t
);
6630 if (TYPE_FIELDS (t
))
6632 tree decl
= grokdeclarator (NULL_TREE
, declspecs
, NORMAL
, 0,
6634 finish_anon_union (decl
);
6639 /* Decode a "typename", such as "int **", returning a ..._TYPE node. */
6642 groktypename (typename
)
6645 if (TREE_CODE (typename
) != TREE_LIST
)
6647 return grokdeclarator (TREE_VALUE (typename
),
6648 TREE_PURPOSE (typename
),
6649 TYPENAME
, 0, NULL_TREE
);
6652 /* Decode a declarator in an ordinary declaration or data definition.
6653 This is called as soon as the type information and variable name
6654 have been parsed, before parsing the initializer if any.
6655 Here we create the ..._DECL node, fill in its type,
6656 and put it on the list of decls for the current context.
6657 The ..._DECL node is returned as the value.
6659 Exception: for arrays where the length is not specified,
6660 the type is left null, to be filled in by `cp_finish_decl'.
6662 Function definitions do not come here; they go to start_function
6663 instead. However, external and forward declarations of functions
6664 do go through here. Structure field declarations are done by
6665 grokfield and not through here. */
6667 /* Set this to zero to debug not using the temporary obstack
6668 to parse initializers. */
6669 int debug_temp_inits
= 1;
6672 start_decl (declarator
, declspecs
, initialized
, attributes
, prefix_attributes
)
6673 tree declarator
, declspecs
;
6675 tree attributes
, prefix_attributes
;
6678 register tree type
, tem
;
6680 extern int have_extern_spec
;
6681 extern int used_extern_spec
;
6685 /* See code below that used this. */
6686 int init_written
= initialized
;
6689 /* This should only be done once on the top most decl. */
6690 if (have_extern_spec
&& !used_extern_spec
)
6692 declspecs
= decl_tree_cons (NULL_TREE
, get_identifier ("extern"),
6694 used_extern_spec
= 1;
6697 if (attributes
|| prefix_attributes
)
6698 attrlist
= build_scratch_list (attributes
, prefix_attributes
);
6700 attrlist
= NULL_TREE
;
6702 decl
= grokdeclarator (declarator
, declspecs
, NORMAL
, initialized
,
6705 if (decl
== NULL_TREE
|| TREE_CODE (decl
) == VOID_TYPE
)
6708 type
= TREE_TYPE (decl
);
6710 if (type
== error_mark_node
)
6714 = (TREE_CODE (decl
) == FUNCTION_DECL
&& DECL_VIRTUAL_P (decl
))
6715 ? DECL_CLASS_CONTEXT (decl
)
6716 : DECL_CONTEXT (decl
);
6718 if (initialized
&& context
&& TREE_CODE (context
) == NAMESPACE_DECL
6719 && context
!= current_namespace
&& TREE_CODE (decl
) == VAR_DECL
)
6721 /* When parsing the initializer, lookup should use the object's
6723 push_decl_namespace (context
);
6726 /* We are only interested in class contexts, later. */
6727 if (context
&& TREE_CODE (context
) == NAMESPACE_DECL
)
6728 context
= NULL_TREE
;
6731 /* Is it valid for this decl to have an initializer at all?
6732 If not, set INITIALIZED to zero, which will indirectly
6733 tell `cp_finish_decl' to ignore the initializer once it is parsed. */
6734 switch (TREE_CODE (decl
))
6737 /* typedef foo = bar means give foo the same type as bar.
6738 We haven't parsed bar yet, so `cp_finish_decl' will fix that up.
6739 Any other case of an initialization in a TYPE_DECL is an error. */
6740 if (pedantic
|| list_length (declspecs
) > 1)
6742 cp_error ("typedef `%D' is initialized", decl
);
6748 cp_error ("function `%#D' is initialized like a variable", decl
);
6758 if (! toplevel_bindings_p ()
6759 && DECL_EXTERNAL (decl
))
6760 cp_warning ("declaration of `%#D' has `extern' and is initialized",
6762 DECL_EXTERNAL (decl
) = 0;
6763 if (toplevel_bindings_p ())
6764 TREE_STATIC (decl
) = 1;
6766 /* Tell `pushdecl' this is an initialized decl
6767 even though we don't yet have the initializer expression.
6768 Also tell `cp_finish_decl' it may store the real initializer. */
6769 DECL_INITIAL (decl
) = error_mark_node
;
6772 #ifdef SET_DEFAULT_DECL_ATTRIBUTES
6773 SET_DEFAULT_DECL_ATTRIBUTES (decl
, attributes
);
6776 /* Set attributes here so if duplicate decl, will have proper attributes. */
6777 cplus_decl_attributes (decl
, attributes
, prefix_attributes
);
6779 if (context
&& TYPE_SIZE (complete_type (context
)) != NULL_TREE
)
6781 push_nested_class (context
, 2);
6783 if (TREE_CODE (decl
) == VAR_DECL
)
6785 tree field
= lookup_field (context
, DECL_NAME (decl
), 0, 0);
6786 if (field
== NULL_TREE
|| TREE_CODE (field
) != VAR_DECL
)
6787 cp_error ("`%#D' is not a static member of `%#T'", decl
, context
);
6790 if (DECL_CONTEXT (field
) != context
)
6792 cp_pedwarn ("ANSI C++ does not permit `%T::%D' to be defined as `%T::%D'",
6793 DECL_CONTEXT (field
), DECL_NAME (decl
),
6794 context
, DECL_NAME (decl
));
6795 DECL_CONTEXT (decl
) = DECL_CONTEXT (field
);
6797 /* Static data member are tricky; an in-class initialization
6798 still doesn't provide a definition, so the in-class
6799 declaration will have DECL_EXTERNAL set, but will have an
6800 initialization. Thus, duplicate_decls won't warn
6801 about this situation, and so we check here. */
6802 if (DECL_INITIAL (decl
) && DECL_INITIAL (field
))
6803 cp_error ("duplicate initialization of %D", decl
);
6804 if (duplicate_decls (decl
, field
))
6810 tree field
= check_classfn (context
, decl
);
6811 if (field
&& duplicate_decls (decl
, field
))
6815 /* cp_finish_decl sets DECL_EXTERNAL if DECL_IN_AGGR_P is set. */
6816 DECL_IN_AGGR_P (decl
) = 0;
6817 if ((DECL_LANG_SPECIFIC (decl
) && DECL_USE_TEMPLATE (decl
))
6818 || CLASSTYPE_USE_TEMPLATE (context
))
6820 SET_DECL_TEMPLATE_SPECIALIZATION (decl
);
6821 /* [temp.expl.spec] An explicit specialization of a static data
6822 member of a template is a definition if the declaration
6823 includes an initializer; otherwise, it is a declaration.
6825 We check for processing_specialization so this only applies
6826 to the new specialization syntax. */
6827 if (DECL_INITIAL (decl
) == NULL_TREE
&& processing_specialization
)
6828 DECL_EXTERNAL (decl
) = 1;
6831 if (DECL_EXTERNAL (decl
) && ! DECL_TEMPLATE_SPECIALIZATION (decl
))
6832 cp_pedwarn ("declaration of `%#D' outside of class is not definition",
6836 /* Enter this declaration into the symbol table. */
6837 tem
= maybe_push_decl (decl
);
6839 if (processing_template_decl
)
6841 if (at_function_scope_p ())
6842 push_permanent_obstack ();
6843 tem
= push_template_decl (tem
);
6844 if (at_function_scope_p ())
6849 #if ! defined (ASM_OUTPUT_BSS) && ! defined (ASM_OUTPUT_ALIGNED_BSS)
6850 /* Tell the back-end to use or not use .common as appropriate. If we say
6851 -fconserve-space, we want this to save .data space, at the expense of
6852 wrong semantics. If we say -fno-conserve-space, we want this to
6853 produce errors about redefs; to do this we force variables into the
6855 DECL_COMMON (tem
) = flag_conserve_space
|| ! TREE_PUBLIC (tem
);
6858 if (! processing_template_decl
)
6861 /* Corresponding pop_obstacks is done in `cp_finish_decl'. */
6862 push_obstacks_nochange ();
6871 tree type
= TREE_TYPE (decl
);
6872 int initialized
= (DECL_INITIAL (decl
) != NULL_TREE
);
6874 if (type
== error_mark_node
)
6877 /* If this type of object needs a cleanup, and control may
6878 jump past it, make a new binding level so that it is cleaned
6879 up only when it is initialized first. */
6880 if (TYPE_NEEDS_DESTRUCTOR (type
)
6881 && current_binding_level
->more_cleanups_ok
== 0)
6882 pushlevel_temporary (1);
6885 /* Is it valid for this decl to have an initializer at all?
6886 If not, set INITIALIZED to zero, which will indirectly
6887 tell `cp_finish_decl' to ignore the initializer once it is parsed. */
6889 /* Don't allow initializations for incomplete types except for
6890 arrays which might be completed by the initialization. */
6891 if (TYPE_SIZE (complete_type (type
)) != NULL_TREE
)
6892 ; /* A complete type is ok. */
6893 else if (TREE_CODE (type
) != ARRAY_TYPE
)
6895 cp_error ("variable `%#D' has initializer but incomplete type",
6898 type
= TREE_TYPE (decl
) = error_mark_node
;
6900 else if (TYPE_SIZE (complete_type (TREE_TYPE (type
))) == NULL_TREE
)
6902 if (DECL_LANG_SPECIFIC (decl
) && DECL_TEMPLATE_INFO (decl
))
6903 cp_error ("elements of array `%#D' have incomplete type", decl
);
6904 /* else we already gave an error in start_decl. */
6910 && TREE_CODE (decl
) != TYPE_DECL
6911 && TREE_CODE (decl
) != TEMPLATE_DECL
6912 && IS_AGGR_TYPE (type
) && ! DECL_EXTERNAL (decl
))
6914 if ((! processing_template_decl
|| ! uses_template_parms (type
))
6915 && TYPE_SIZE (complete_type (type
)) == NULL_TREE
)
6917 cp_error ("aggregate `%#D' has incomplete type and cannot be initialized",
6919 /* Change the type so that assemble_variable will give
6920 DECL an rtl we can live with: (mem (const_int 0)). */
6921 type
= TREE_TYPE (decl
) = error_mark_node
;
6925 /* If any base type in the hierarchy of TYPE needs a constructor,
6926 then we set initialized to 1. This way any nodes which are
6927 created for the purposes of initializing this aggregate
6928 will live as long as it does. This is necessary for global
6929 aggregates which do not have their initializers processed until
6930 the end of the file. */
6931 initialized
= TYPE_NEEDS_CONSTRUCTING (type
);
6936 DECL_INITIAL (decl
) = NULL_TREE
;
6939 /* Handle initialization of references.
6940 These three arguments are from `cp_finish_decl', and have the
6941 same meaning here that they do there.
6943 Quotes on semantics can be found in ARM 8.4.3. */
6946 grok_reference_init (decl
, type
, init
)
6947 tree decl
, type
, init
;
6951 if (init
== NULL_TREE
)
6953 if ((DECL_LANG_SPECIFIC (decl
) == 0
6954 || DECL_IN_AGGR_P (decl
) == 0)
6955 && ! DECL_THIS_EXTERN (decl
))
6956 cp_error ("`%D' declared as reference but not initialized", decl
);
6960 if (init
== error_mark_node
)
6963 if (TREE_CODE (init
) == CONSTRUCTOR
)
6965 cp_error ("ANSI C++ forbids use of initializer list to initialize reference `%D'", decl
);
6969 if (TREE_CODE (init
) == TREE_LIST
)
6970 init
= build_compound_expr (init
);
6972 if (TREE_CODE (TREE_TYPE (init
)) == REFERENCE_TYPE
)
6973 init
= convert_from_reference (init
);
6975 if (TREE_CODE (TREE_TYPE (type
)) != ARRAY_TYPE
6976 && TREE_CODE (TREE_TYPE (init
)) == ARRAY_TYPE
)
6978 /* Note: default conversion is only called in very special cases. */
6979 init
= default_conversion (init
);
6982 /* Convert INIT to the reference type TYPE. This may involve the
6983 creation of a temporary, whose lifetime must be the same as that
6984 of the reference. If so, a DECL_STMT for the temporary will be
6985 added just after the DECL_STMT for DECL. That's why we don't set
6986 DECL_INITIAL for local references (instead assigning to them
6987 explicitly); we need to allow the temporary to be initialized
6989 tmp
= convert_to_reference
6990 (type
, init
, CONV_IMPLICIT
,
6991 LOOKUP_SPECULATIVELY
|LOOKUP_NORMAL
|DIRECT_BIND
, decl
);
6993 if (tmp
== error_mark_node
)
6995 else if (tmp
!= NULL_TREE
)
6998 tmp
= save_expr (tmp
);
6999 if (building_stmt_tree ())
7001 /* Initialize the declaration. */
7002 tmp
= build (INIT_EXPR
, TREE_TYPE (decl
), decl
, tmp
);
7003 finish_expr_stmt (tmp
);
7006 DECL_INITIAL (decl
) = tmp
;
7010 cp_error ("cannot initialize `%T' from `%T'", type
, TREE_TYPE (init
));
7014 if (TREE_STATIC (decl
) && ! TREE_CONSTANT (DECL_INITIAL (decl
)))
7016 expand_static_init (decl
, DECL_INITIAL (decl
));
7017 DECL_INITIAL (decl
) = NULL_TREE
;
7022 /* Fill in DECL_INITIAL with some magical value to prevent expand_decl from
7023 mucking with forces it does not comprehend (i.e. initialization with a
7024 constructor). If we are at global scope and won't go into COMMON, fill
7025 it in with a dummy CONSTRUCTOR to force the variable into .data;
7026 otherwise we can use error_mark_node. */
7029 obscure_complex_init (decl
, init
)
7032 if (! flag_no_inline
&& TREE_STATIC (decl
))
7034 if (extract_init (decl
, init
))
7038 #if ! defined (ASM_OUTPUT_BSS) && ! defined (ASM_OUTPUT_ALIGNED_BSS)
7039 if (toplevel_bindings_p () && ! DECL_COMMON (decl
))
7040 DECL_INITIAL (decl
) = build (CONSTRUCTOR
, TREE_TYPE (decl
), NULL_TREE
,
7044 DECL_INITIAL (decl
) = error_mark_node
;
7049 /* When parsing `int a[] = {1, 2};' we don't know the size of the
7050 array until we finish parsing the initializer. If that's the
7051 situation we're in, update DECL accordingly. */
7054 maybe_deduce_size_from_array_init (decl
, init
)
7058 tree type
= TREE_TYPE (decl
);
7060 if (TREE_CODE (type
) == ARRAY_TYPE
7061 && TYPE_DOMAIN (type
) == NULL_TREE
7062 && TREE_CODE (decl
) != TYPE_DECL
)
7065 = (TREE_STATIC (decl
)
7066 /* Even if pedantic, an external linkage array
7067 may have incomplete type at first. */
7068 ? pedantic
&& ! DECL_EXTERNAL (decl
)
7069 : !DECL_EXTERNAL (decl
));
7070 tree initializer
= init
? init
: DECL_INITIAL (decl
);
7071 int failure
= complete_array_type (type
, initializer
, do_default
);
7074 cp_error ("initializer fails to determine size of `%D'", decl
);
7079 cp_error ("array size missing in `%D'", decl
);
7080 /* If a `static' var's size isn't known, make it extern as
7081 well as static, so it does not get allocated. If it's not
7082 `static', then don't mark it extern; finish_incomplete_decl
7083 will give it a default size and it will get allocated. */
7084 else if (!pedantic
&& TREE_STATIC (decl
) && !TREE_PUBLIC (decl
))
7085 DECL_EXTERNAL (decl
) = 1;
7088 if (pedantic
&& TYPE_DOMAIN (type
) != NULL_TREE
7089 && tree_int_cst_lt (TYPE_MAX_VALUE (TYPE_DOMAIN (type
)),
7091 cp_error ("zero-size array `%D'", decl
);
7093 layout_decl (decl
, 0);
7097 /* Set DECL_SIZE, DECL_ALIGN, etc. for DECL (a VAR_DECL), and issue
7098 any appropriate error messages regarding the layout. */
7101 layout_var_decl (decl
)
7104 tree type
= TREE_TYPE (decl
);
7105 tree ttype
= target_type (type
);
7107 /* If we haven't already layed out this declaration, do so now.
7108 Note that we must not call complete type for an external object
7109 because it's type might involve templates that we are not
7110 supposed to isntantiate yet. (And it's perfectly legal to say
7111 `extern X x' for some incomplete type `X'.) */
7112 if (!DECL_EXTERNAL (decl
))
7113 complete_type (type
);
7114 if (!DECL_SIZE (decl
)&& TYPE_SIZE (type
))
7115 layout_decl (decl
, 0);
7117 if (!DECL_EXTERNAL (decl
) && DECL_SIZE (decl
) == NULL_TREE
)
7119 /* An automatic variable with an incomplete type: that is an error.
7120 Don't talk about array types here, since we took care of that
7121 message in grokdeclarator. */
7122 cp_error ("storage size of `%D' isn't known", decl
);
7123 TREE_TYPE (decl
) = error_mark_node
;
7125 else if (!DECL_EXTERNAL (decl
) && IS_AGGR_TYPE (ttype
))
7126 /* Let debugger know it should output info for this type. */
7127 note_debug_info_needed (ttype
);
7129 if (TREE_STATIC (decl
) && DECL_CLASS_SCOPE_P (decl
))
7130 note_debug_info_needed (DECL_CONTEXT (decl
));
7132 if ((DECL_EXTERNAL (decl
) || TREE_STATIC (decl
))
7133 && DECL_SIZE (decl
) != NULL_TREE
7134 && ! TREE_CONSTANT (DECL_SIZE (decl
)))
7136 if (TREE_CODE (DECL_SIZE (decl
)) == INTEGER_CST
)
7137 constant_expression_warning (DECL_SIZE (decl
));
7139 cp_error ("storage size of `%D' isn't constant", decl
);
7143 /* If a local static variable is declared in an inline function, or if
7144 we have a weak definition, we must endeavor to create only one
7145 instance of the variable at link-time. */
7148 maybe_commonize_var (decl
)
7151 /* Static data in a function with comdat linkage also has comdat
7153 if (TREE_STATIC (decl
)
7154 /* Don't mess with __FUNCTION__. */
7155 && ! TREE_ASM_WRITTEN (decl
)
7156 && current_function_decl
7157 && DECL_CONTEXT (decl
) == current_function_decl
7158 && (DECL_THIS_INLINE (current_function_decl
)
7159 || DECL_TEMPLATE_INSTANTIATION (current_function_decl
))
7160 && TREE_PUBLIC (current_function_decl
))
7162 /* Rather than try to get this right with inlining, we suppress
7163 inlining of such functions. */
7164 current_function_cannot_inline
7165 = "function with static variable cannot be inline";
7167 /* If flag_weak, we don't need to mess with this, as we can just
7168 make the function weak, and let it refer to its unique local
7169 copy. This works because we don't allow the function to be
7173 if (DECL_INTERFACE_KNOWN (current_function_decl
))
7175 TREE_PUBLIC (decl
) = 1;
7176 DECL_EXTERNAL (decl
) = DECL_EXTERNAL (current_function_decl
);
7178 else if (DECL_INITIAL (decl
) == NULL_TREE
7179 || DECL_INITIAL (decl
) == error_mark_node
)
7181 TREE_PUBLIC (decl
) = 1;
7182 DECL_COMMON (decl
) = 1;
7184 /* else we lose. We can only do this if we can use common,
7185 which we can't if it has been initialized. */
7187 if (TREE_PUBLIC (decl
))
7188 DECL_ASSEMBLER_NAME (decl
)
7189 = build_static_name (current_function_decl
, DECL_NAME (decl
));
7190 else if (! DECL_ARTIFICIAL (decl
))
7192 cp_warning_at ("sorry: semantics of inline function static data `%#D' are wrong (you'll wind up with multiple copies)", decl
);
7193 cp_warning_at (" you can work around this by removing the initializer", decl
);
7197 else if (DECL_LANG_SPECIFIC (decl
) && DECL_COMDAT (decl
))
7198 /* Set it up again; we might have set DECL_INITIAL since the last
7200 comdat_linkage (decl
);
7203 /* Issue an error message if DECL is an uninitialized const variable. */
7206 check_for_uninitialized_const_var (decl
)
7209 tree type
= TREE_TYPE (decl
);
7211 /* ``Unless explicitly declared extern, a const object does not have
7212 external linkage and must be initialized. ($8.4; $12.1)'' ARM
7214 if (TREE_CODE (decl
) == VAR_DECL
7215 && TREE_CODE (type
) != REFERENCE_TYPE
7216 && CP_TYPE_CONST_P (type
)
7217 && !TYPE_NEEDS_CONSTRUCTING (type
)
7218 && !DECL_INITIAL (decl
))
7219 cp_error ("uninitialized const `%D'", decl
);
7222 /* Verify INIT (the initializer for DECL), and record the
7223 initialization in DECL_INITIAL, if appropriate. Returns a new
7227 check_initializer (decl
, init
)
7233 if (TREE_CODE (decl
) == FIELD_DECL
)
7236 type
= TREE_TYPE (decl
);
7238 /* If `start_decl' didn't like having an initialization, ignore it now. */
7239 if (init
!= NULL_TREE
&& DECL_INITIAL (decl
) == NULL_TREE
)
7242 /* Check the initializer. */
7245 /* Things that are going to be initialized need to have complete
7247 TREE_TYPE (decl
) = type
= complete_type (TREE_TYPE (decl
));
7249 if (type
== error_mark_node
)
7250 /* We will have already complained. */
7252 else if (TYPE_SIZE (type
) && !TREE_CONSTANT (TYPE_SIZE (type
)))
7254 cp_error ("variable-sized object `%D' may not be initialized", decl
);
7257 else if (TREE_CODE (type
) == ARRAY_TYPE
7258 && !TYPE_SIZE (TREE_TYPE (type
)))
7260 cp_error ("elements of array `%#D' have incomplete type", decl
);
7263 else if (!TYPE_SIZE (type
))
7265 cp_error ("`%D' has incomplete type", decl
);
7266 TREE_TYPE (decl
) = error_mark_node
;
7271 if (TREE_CODE (decl
) == CONST_DECL
)
7273 my_friendly_assert (TREE_CODE (decl
) != REFERENCE_TYPE
, 148);
7275 DECL_INITIAL (decl
) = init
;
7277 /* This will keep us from needing to worry about our obstacks. */
7278 my_friendly_assert (init
!= NULL_TREE
, 149);
7281 else if (!DECL_EXTERNAL (decl
) && TREE_CODE (type
) == REFERENCE_TYPE
)
7283 if (TREE_STATIC (decl
))
7284 make_decl_rtl (decl
, NULL_PTR
, toplevel_bindings_p ());
7285 grok_reference_init (decl
, type
, init
);
7290 if (TYPE_HAS_CONSTRUCTOR (type
) || TYPE_NEEDS_CONSTRUCTING (type
))
7292 if (TREE_CODE (type
) == ARRAY_TYPE
)
7293 init
= digest_init (type
, init
, (tree
*) 0);
7294 else if (TREE_CODE (init
) == CONSTRUCTOR
7295 && TREE_HAS_CONSTRUCTOR (init
))
7297 if (TYPE_NON_AGGREGATE_CLASS (type
))
7299 cp_error ("`%D' must be initialized by constructor, not by `{...}'",
7301 init
= error_mark_node
;
7304 goto dont_use_constructor
;
7309 dont_use_constructor
:
7310 if (TREE_CODE (init
) != TREE_VEC
)
7311 init
= store_init_value (decl
, init
);
7315 /* We must hide the initializer so that expand_decl
7316 won't try to do something it does not understand. */
7317 init
= obscure_complex_init (decl
, init
);
7319 else if (DECL_EXTERNAL (decl
))
7321 else if (TREE_CODE_CLASS (TREE_CODE (type
)) == 't'
7322 && (IS_AGGR_TYPE (type
) || TYPE_NEEDS_CONSTRUCTING (type
)))
7324 tree core_type
= strip_array_types (type
);
7326 if (! TYPE_NEEDS_CONSTRUCTING (core_type
))
7328 if (CLASSTYPE_READONLY_FIELDS_NEED_INIT (core_type
))
7329 cp_error ("structure `%D' with uninitialized const members", decl
);
7330 if (CLASSTYPE_REF_FIELDS_NEED_INIT (core_type
))
7331 cp_error ("structure `%D' with uninitialized reference members",
7335 check_for_uninitialized_const_var (decl
);
7337 if (TYPE_SIZE (type
) != NULL_TREE
7338 && TYPE_NEEDS_CONSTRUCTING (type
))
7339 init
= obscure_complex_init (decl
, NULL_TREE
);
7343 check_for_uninitialized_const_var (decl
);
7348 /* If DECL is not a local variable, give it RTL. */
7351 make_rtl_for_nonlocal_decl (decl
, init
, asmspec
)
7354 const char *asmspec
;
7359 type
= TREE_TYPE (decl
);
7360 toplev
= toplevel_bindings_p ();
7362 /* Handle non-variables up front. */
7363 if (TREE_CODE (decl
) != VAR_DECL
)
7365 rest_of_decl_compilation (decl
, asmspec
, toplev
, at_eof
);
7369 /* Set the DECL_ASSEMBLER_NAME for the variable. */
7371 DECL_ASSEMBLER_NAME (decl
) = get_identifier (asmspec
);
7373 if (DECL_VIRTUAL_P (decl
))
7374 make_decl_rtl (decl
, NULL_PTR
, toplev
);
7375 else if (TREE_READONLY (decl
)
7376 && DECL_INITIAL (decl
) != NULL_TREE
7377 && DECL_INITIAL (decl
) != error_mark_node
7378 && ! EMPTY_CONSTRUCTOR_P (DECL_INITIAL (decl
)))
7380 DECL_INITIAL (decl
) = save_expr (DECL_INITIAL (decl
));
7382 if (toplev
&& ! TREE_PUBLIC (decl
))
7384 /* If this is a static const, change its apparent linkage
7385 if it belongs to a #pragma interface. */
7386 if (!interface_unknown
)
7388 TREE_PUBLIC (decl
) = 1;
7389 DECL_EXTERNAL (decl
) = interface_only
;
7391 make_decl_rtl (decl
, asmspec
, toplev
);
7394 rest_of_decl_compilation (decl
, asmspec
, toplev
, at_eof
);
7396 else if (DECL_LANG_SPECIFIC (decl
) && DECL_IN_AGGR_P (decl
))
7398 my_friendly_assert (TREE_STATIC (decl
), 19990828);
7400 if (init
== NULL_TREE
7401 #ifdef DEFAULT_STATIC_DEFS
7402 /* If this code is dead, then users must
7403 explicitly declare static member variables
7404 outside the class def'n as well. */
7405 && TYPE_NEEDS_CONSTRUCTING (type
)
7409 DECL_EXTERNAL (decl
) = 1;
7410 make_decl_rtl (decl
, asmspec
, 1);
7413 rest_of_decl_compilation (decl
, asmspec
, toplev
, at_eof
);
7415 else if (TREE_CODE (CP_DECL_CONTEXT (decl
)) == NAMESPACE_DECL
7416 || (TREE_CODE (decl
) == VAR_DECL
&& TREE_STATIC (decl
)))
7417 rest_of_decl_compilation (decl
, asmspec
, toplev
, at_eof
);
7420 /* Create RTL for the local static variable DECL. */
7423 make_rtl_for_local_static (decl
)
7426 tree type
= TREE_TYPE (decl
);
7427 const char *asmspec
= NULL
;
7429 if (TREE_READONLY (decl
)
7430 && DECL_INITIAL (decl
) != NULL_TREE
7431 && DECL_INITIAL (decl
) != error_mark_node
7432 && ! EMPTY_CONSTRUCTOR_P (DECL_INITIAL (decl
))
7433 && ! TREE_SIDE_EFFECTS (decl
)
7434 && ! TREE_PUBLIC (decl
)
7435 && ! DECL_EXTERNAL (decl
)
7436 && ! TYPE_NEEDS_DESTRUCTOR (type
)
7437 && ! TREE_ADDRESSABLE (decl
)
7438 && DECL_MODE (decl
) != BLKmode
)
7440 /* As an optimization, we try to put register-sized static
7441 constants in a register, rather than writing them out. If we
7442 take the address of the constant later, we'll make RTL for it
7444 DECL_RTL (decl
) = gen_reg_rtx (DECL_MODE (decl
));
7445 store_expr (DECL_INITIAL (decl
), DECL_RTL (decl
), 0);
7446 TREE_ASM_WRITTEN (decl
) = 1;
7450 if (DECL_ASSEMBLER_NAME (decl
) != DECL_NAME (decl
))
7452 /* The only way this situaton can occur is if the
7453 user specified a name for this DECL using the
7454 `attribute' syntax. */
7455 asmspec
= IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl
));
7456 DECL_ASSEMBLER_NAME (decl
) = DECL_NAME (decl
);
7459 rest_of_decl_compilation (decl
, asmspec
, /*top_level=*/0, /*at_end=*/0);
7462 /* The old ARM scoping rules injected variables declared in the
7463 initialization statement of a for-statement into the surrounding
7464 scope. We support this usage, in order to be backward-compatible.
7465 DECL is a just-declared VAR_DECL; if necessary inject its
7466 declaration into the surrounding scope. */
7469 maybe_inject_for_scope_var (decl
)
7472 if (current_binding_level
->is_for_scope
)
7474 struct binding_level
*outer
7475 = current_binding_level
->level_chain
;
7477 /* Check to see if the same name is already bound at the outer
7478 level, either because it was directly declared, or because a
7479 dead for-decl got preserved. In either case, the code would
7480 not have been valid under the ARM scope rules, so clear
7481 is_for_scope for the current_binding_level.
7483 Otherwise, we need to preserve the temp slot for decl to last
7484 into the outer binding level. */
7487 = TREE_CHAIN (IDENTIFIER_BINDING (DECL_NAME (decl
)));
7489 if (outer_binding
&& BINDING_LEVEL (outer_binding
) == outer
7490 && (TREE_CODE (BINDING_VALUE (outer_binding
))
7492 && DECL_DEAD_FOR_LOCAL (BINDING_VALUE (outer_binding
)))
7494 BINDING_VALUE (outer_binding
)
7495 = DECL_SHADOWED_FOR_VAR (BINDING_VALUE (outer_binding
));
7496 current_binding_level
->is_for_scope
= 0;
7498 else if (DECL_IN_MEMORY_P (decl
))
7499 preserve_temp_slots (DECL_RTL (decl
));
7503 /* Generate code to initialize DECL (a local variable). */
7506 initialize_local_var (decl
, init
, flags
)
7511 tree type
= TREE_TYPE (decl
);
7513 /* If the type is bogus, don't bother initializing the variable. */
7514 if (type
== error_mark_node
)
7517 if (DECL_SIZE (decl
) == NULL_TREE
&& !TREE_STATIC (decl
))
7519 /* If we used it already as memory, it must stay in memory. */
7520 DECL_INITIAL (decl
) = NULL_TREE
;
7521 TREE_ADDRESSABLE (decl
) = TREE_USED (decl
);
7524 /* Local statics are handled differently from ordinary automatic
7526 if (TREE_STATIC (decl
))
7528 if (TYPE_NEEDS_CONSTRUCTING (type
) || init
!= NULL_TREE
7529 || TYPE_NEEDS_DESTRUCTOR (type
))
7530 expand_static_init (decl
, init
);
7534 if (DECL_SIZE (decl
) && type
!= error_mark_node
)
7538 /* Compute and store the initial value. */
7539 already_used
= TREE_USED (decl
) || TREE_USED (type
);
7541 if (init
|| TYPE_NEEDS_CONSTRUCTING (type
))
7543 int saved_stmts_are_full_exprs_p
;
7545 emit_line_note (DECL_SOURCE_FILE (decl
),
7546 DECL_SOURCE_LINE (decl
));
7547 saved_stmts_are_full_exprs_p
= stmts_are_full_exprs_p
;
7548 stmts_are_full_exprs_p
= 1;
7549 finish_expr_stmt (build_aggr_init (decl
, init
, flags
));
7550 stmts_are_full_exprs_p
= saved_stmts_are_full_exprs_p
;
7553 /* Set this to 0 so we can tell whether an aggregate which was
7554 initialized was ever used. Don't do this if it has a
7555 destructor, so we don't complain about the 'resource
7556 allocation is initialization' idiom. Now set
7557 attribute((unused)) on types so decls of that type will be
7558 marked used. (see TREE_USED, above.) */
7559 if (TYPE_NEEDS_CONSTRUCTING (type
)
7561 && !TYPE_NEEDS_DESTRUCTOR (type
)
7562 && DECL_NAME (decl
))
7563 TREE_USED (decl
) = 0;
7564 else if (already_used
)
7565 TREE_USED (decl
) = 1;
7569 /* Generate code to destroy DECL (a local variable). */
7572 destroy_local_var (decl
)
7575 tree type
= TREE_TYPE (decl
);
7578 /* Only variables get cleaned up. */
7579 if (TREE_CODE (decl
) != VAR_DECL
)
7582 /* And only things with destructors need cleaning up. */
7583 if (!TYPE_NEEDS_DESTRUCTOR (type
))
7586 if (TREE_CODE (decl
) == VAR_DECL
&&
7587 (DECL_EXTERNAL (decl
) || TREE_STATIC (decl
)))
7588 /* We don't clean up things that aren't defined in this
7589 translation unit, or that need a static cleanup. The latter
7590 are handled by finish_file. */
7593 /* Compute the cleanup. */
7594 cleanup
= maybe_build_cleanup (decl
);
7596 /* Record the cleanup required for this declaration. */
7597 if (DECL_SIZE (decl
) && TREE_TYPE (decl
) != error_mark_node
7599 finish_decl_cleanup (decl
, cleanup
);
7602 /* Let the back-end know about DECL. */
7605 emit_local_var (decl
)
7608 /* Create RTL for this variable. */
7609 if (DECL_RTL (decl
))
7610 /* Only a RESULT_DECL should have non-NULL RTL when
7611 arriving here. All other local variables are
7612 assigned RTL in this function. */
7613 my_friendly_assert (TREE_CODE (decl
) == RESULT_DECL
,
7617 if (DECL_ASSEMBLER_NAME (decl
) != DECL_NAME (decl
))
7618 /* The user must have specified an assembler name for this
7619 variable. Set that up now. */
7620 rest_of_decl_compilation
7621 (decl
, IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl
)),
7622 /*top_level=*/0, /*at_end=*/0);
7627 /* Actually do the initialization. */
7628 expand_start_target_temps ();
7629 expand_decl_init (decl
);
7630 expand_end_target_temps ();
7633 /* Finish processing of a declaration;
7634 install its line number and initial value.
7635 If the length of an array type is not known before,
7636 it must be determined now, from the initial value, or it is an error.
7638 Call `pop_obstacks' iff NEED_POP is nonzero.
7640 For C++, `cp_finish_decl' must be fairly evasive: it must keep initializers
7641 for aggregates that have constructors alive on the permanent obstack,
7642 so that the global initializing functions can be written at the end.
7644 INIT0 holds the value of an initializer that should be allowed to escape
7647 FLAGS is LOOKUP_ONLYCONVERTING is the = init syntax was used, else 0
7648 if the (init) syntax was used.
7650 For functions that take default parameters, DECL points to its
7651 "maximal" instantiation. `cp_finish_decl' must then also declared its
7652 subsequently lower and lower forms of instantiation, checking for
7653 ambiguity as it goes. This can be sped up later. */
7656 cp_finish_decl (decl
, init
, asmspec_tree
, need_pop
, flags
)
7663 tree ttype
= NULL_TREE
;
7664 int temporary
= allocation_temporary_p ();
7665 const char *asmspec
= NULL
;
7666 int was_readonly
= 0;
7668 /* If this is 0, then we did not change obstacks. */
7672 error ("assignment (not initialization) in declaration");
7676 /* If a name was specified, get the string. */
7678 asmspec
= TREE_STRING_POINTER (asmspec_tree
);
7680 if (init
&& TREE_CODE (init
) == NAMESPACE_DECL
)
7682 cp_error ("Cannot initialize `%D' to namespace `%D'",
7687 if (current_class_type
7688 && DECL_REAL_CONTEXT (decl
) == current_class_type
7689 && TYPE_BEING_DEFINED (current_class_type
)
7690 && (DECL_INITIAL (decl
) || init
))
7691 DECL_DEFINED_IN_CLASS_P (decl
) = 1;
7693 if (TREE_CODE (decl
) == VAR_DECL
7694 && DECL_CONTEXT (decl
)
7695 && TREE_CODE (DECL_CONTEXT (decl
)) == NAMESPACE_DECL
7696 && DECL_CONTEXT (decl
) != current_namespace
7699 /* Leave the namespace of the object. */
7700 pop_decl_namespace ();
7703 type
= TREE_TYPE (decl
);
7705 if (type
== error_mark_node
)
7707 if (toplevel_bindings_p () && temporary
)
7708 end_temporary_allocation ();
7713 /* Add this declaration to the statement-tree. */
7714 if (building_stmt_tree ()
7715 && TREE_CODE (current_scope ()) == FUNCTION_DECL
)
7716 add_decl_stmt (decl
);
7718 if (TYPE_HAS_MUTABLE_P (type
))
7719 TREE_READONLY (decl
) = 0;
7721 if (processing_template_decl
)
7723 if (init
&& DECL_INITIAL (decl
))
7724 DECL_INITIAL (decl
) = init
;
7728 /* Parameters are handled by store_parm_decls, not cp_finish_decl. */
7729 my_friendly_assert (TREE_CODE (decl
) != PARM_DECL
, 19990828);
7731 /* Take care of TYPE_DECLs up front. */
7732 if (TREE_CODE (decl
) == TYPE_DECL
)
7734 if (init
&& DECL_INITIAL (decl
))
7736 /* typedef foo = bar; store the type of bar as the type of foo. */
7737 TREE_TYPE (decl
) = type
= TREE_TYPE (init
);
7738 DECL_INITIAL (decl
) = init
= NULL_TREE
;
7740 if (type
!= error_mark_node
7741 && IS_AGGR_TYPE (type
) && DECL_NAME (decl
))
7743 if (TREE_TYPE (DECL_NAME (decl
)) && TREE_TYPE (decl
) != type
)
7744 cp_warning ("shadowing previous type declaration of `%#D'", decl
);
7745 set_identifier_type_value (DECL_NAME (decl
), type
);
7746 CLASSTYPE_GOT_SEMICOLON (type
) = 1;
7748 GNU_xref_decl (current_function_decl
, decl
);
7750 /* If we have installed this as the canonical typedef for this
7751 type, and that type has not been defined yet, delay emitting
7752 the debug information for it, as we will emit it later. */
7753 if (TYPE_MAIN_DECL (TREE_TYPE (decl
)) == decl
7754 && TYPE_SIZE (TREE_TYPE (decl
)) == NULL_TREE
)
7755 TYPE_DECL_SUPPRESS_DEBUG (decl
) = 1;
7757 rest_of_decl_compilation (decl
, NULL_PTR
,
7758 DECL_CONTEXT (decl
) == NULL_TREE
, at_eof
);
7762 if (TREE_CODE (decl
) != FUNCTION_DECL
)
7763 ttype
= target_type (type
);
7765 if (! DECL_EXTERNAL (decl
) && TREE_READONLY (decl
)
7766 && TYPE_NEEDS_CONSTRUCTING (type
))
7768 /* Currently, GNU C++ puts constants in text space, making them
7769 impossible to initialize. In the future, one would hope for
7770 an operating system which understood the difference between
7771 initialization and the running of a program. */
7773 TREE_READONLY (decl
) = 0;
7776 if (TREE_CODE (decl
) == FIELD_DECL
&& asmspec
)
7778 /* This must override the asm specifier which was placed by
7779 grokclassfn. Lay this out fresh. */
7780 DECL_RTL (TREE_TYPE (decl
)) = NULL_RTX
;
7781 DECL_ASSEMBLER_NAME (decl
) = get_identifier (asmspec
);
7782 make_decl_rtl (decl
, asmspec
, 0);
7785 /* Deduce size of array from initialization, if not already known. */
7786 maybe_deduce_size_from_array_init (decl
, init
);
7787 init
= check_initializer (decl
, init
);
7789 GNU_xref_decl (current_function_decl
, decl
);
7791 /* For top-level declaration, the initial value was read in
7792 the temporary obstack. MAXINDEX, rtl, etc. to be made below
7793 must go in the permanent obstack; but don't discard the
7794 temporary data yet. */
7796 if (toplevel_bindings_p () && temporary
)
7797 end_temporary_allocation ();
7799 if (TREE_CODE (decl
) == VAR_DECL
)
7800 layout_var_decl (decl
);
7802 /* Output the assembler code and/or RTL code for variables and functions,
7803 unless the type is an undefined structure or union.
7804 If not, it will get done when the type is completed. */
7805 if (TREE_CODE (decl
) == VAR_DECL
|| TREE_CODE (decl
) == FUNCTION_DECL
7806 || TREE_CODE (decl
) == RESULT_DECL
)
7808 if (TREE_CODE (decl
) == VAR_DECL
)
7809 maybe_commonize_var (decl
);
7811 make_rtl_for_nonlocal_decl (decl
, init
, asmspec
);
7813 if (TREE_CODE (type
) == FUNCTION_TYPE
7814 || TREE_CODE (type
) == METHOD_TYPE
)
7815 abstract_virtuals_error (decl
,
7816 strip_array_types (TREE_TYPE (type
)));
7818 abstract_virtuals_error (decl
, strip_array_types (type
));
7820 if (TREE_CODE (decl
) == FUNCTION_DECL
)
7822 else if (DECL_EXTERNAL (decl
)
7823 && ! (DECL_LANG_SPECIFIC (decl
)
7824 && DECL_NOT_REALLY_EXTERN (decl
)))
7827 DECL_INITIAL (decl
) = init
;
7829 else if (TREE_CODE (CP_DECL_CONTEXT (decl
)) == FUNCTION_DECL
)
7831 /* This is a local declaration. */
7832 if (doing_semantic_analysis_p ())
7833 maybe_inject_for_scope_var (decl
);
7834 /* Initialize the local variable. But, if we're building a
7835 statement-tree, we'll do the initialization when we
7837 if (processing_template_decl
)
7839 if (init
|| DECL_INITIAL (decl
) == error_mark_node
)
7840 DECL_INITIAL (decl
) = init
;
7844 /* If we're not building RTL, then we need to do so
7846 if (!building_stmt_tree ())
7847 emit_local_var (decl
);
7848 /* Initialize the variable. */
7849 initialize_local_var (decl
, init
, flags
);
7850 /* Clean up the variable. */
7851 destroy_local_var (decl
);
7854 else if (TREE_STATIC (decl
) && type
!= error_mark_node
)
7856 /* Cleanups for static variables are handled by `finish_file'. */
7857 if (TYPE_NEEDS_CONSTRUCTING (type
) || init
!= NULL_TREE
7858 || TYPE_NEEDS_DESTRUCTOR (type
))
7859 expand_static_init (decl
, init
);
7863 /* Undo call to `pushclass' that was done in `start_decl'
7864 due to initialization of qualified member variable.
7865 I.e., Foo::x = 10; */
7867 tree context
= DECL_REAL_CONTEXT (decl
);
7869 && TREE_CODE_CLASS (TREE_CODE (context
)) == 't'
7870 && (TREE_CODE (decl
) == VAR_DECL
7871 /* We also have a pushclass done that we need to undo here
7872 if we're at top level and declare a method. */
7873 || TREE_CODE (decl
) == FUNCTION_DECL
)
7874 /* If size hasn't been set, we're still defining it,
7875 and therefore inside the class body; don't pop
7876 the binding level.. */
7877 && TYPE_SIZE (context
) != NULL_TREE
7878 && context
== current_class_type
)
7879 pop_nested_class ();
7885 /* If requested, warn about definitions of large data objects. */
7887 if (warn_larger_than
7888 && ! processing_template_decl
7889 && (TREE_CODE (decl
) == VAR_DECL
|| TREE_CODE (decl
) == PARM_DECL
)
7890 && !DECL_EXTERNAL (decl
))
7892 register tree decl_size
= DECL_SIZE (decl
);
7894 if (decl_size
&& TREE_CODE (decl_size
) == INTEGER_CST
)
7896 unsigned units
= TREE_INT_CST_LOW (decl_size
) / BITS_PER_UNIT
;
7898 if (units
> larger_than_size
)
7899 warning_with_decl (decl
, "size of `%s' is %u bytes", units
);
7904 /* Resume permanent allocation, if not within a function. The
7905 corresponding push_obstacks_nochange is in start_decl,
7906 start_method, groktypename, and in grokfield. */
7910 TREE_READONLY (decl
) = 1;
7913 /* This is here for a midend callback from c-common.c */
7916 finish_decl (decl
, init
, asmspec_tree
)
7920 cp_finish_decl (decl
, init
, asmspec_tree
, 1, 0);
7923 /* Generate code to handle the destruction of the function-scoped
7924 static variable DECL. */
7927 destroy_local_static (decl
)
7930 tree cleanup
, fcall
;
7932 int saved_flag_access_control
;
7934 if (atexit_node
== 0)
7936 tree atexit_fndecl
, PFV
, pfvlist
;
7937 /* Remember this information until end of file. */
7938 push_obstacks (&permanent_obstack
, &permanent_obstack
);
7939 PFV
= build_pointer_type (build_function_type
7940 (void_type_node
, void_list_node
));
7942 pfvlist
= tree_cons (NULL_TREE
, PFV
, void_list_node
);
7944 push_lang_context (lang_name_c
);
7945 /* Note that we do not call pushdecl for this function;
7946 there's no reason that this declaration should be
7947 accessible to anyone. */
7949 = define_function ("atexit",
7950 build_function_type (void_type_node
,
7952 /*pfn=*/0, NULL_PTR
);
7953 mark_used (atexit_fndecl
);
7954 atexit_node
= default_conversion (atexit_fndecl
);
7955 pop_lang_context ();
7959 /* Call build_cleanup before we enter the anonymous function so that
7960 any access checks will be done relative to the current scope,
7961 rather than the scope of the anonymous function. */
7962 build_cleanup (decl
);
7964 /* Now start the function. */
7965 cleanup
= start_anon_func ();
7967 /* Now, recompute the cleanup. It may contain SAVE_EXPRs that refer
7968 to the original function, rather than the anonymous one. That
7969 will make the back-end think that nested functions are in use,
7970 which causes confusion. */
7971 saved_flag_access_control
= flag_access_control
;
7972 flag_access_control
= 0;
7973 fcall
= build_cleanup (decl
);
7974 flag_access_control
= saved_flag_access_control
;
7976 /* Create the body of the anonymous function. */
7977 compound_stmt
= begin_compound_stmt (/*has_no_scope=*/0);
7978 finish_expr_stmt (fcall
);
7979 finish_compound_stmt (/*has_no_scope=*/0, compound_stmt
);
7982 /* Call atexit with the cleanup function. */
7983 mark_addressable (cleanup
);
7984 cleanup
= build_unary_op (ADDR_EXPR
, cleanup
, 0);
7985 fcall
= build_function_call (atexit_node
,
7986 tree_cons (NULL_TREE
,
7989 finish_expr_stmt (fcall
);
7993 expand_static_init (decl
, init
)
7997 tree oldstatic
= value_member (decl
, static_aggregates
);
8001 if (TREE_PURPOSE (oldstatic
) && init
!= NULL_TREE
)
8002 cp_error ("multiple initializations given for `%D'", decl
);
8004 else if (! toplevel_bindings_p ())
8006 /* Emit code to perform this initialization but once. */
8013 /* Remember this information until end of file. */
8014 push_obstacks (&permanent_obstack
, &permanent_obstack
);
8016 /* Emit code to perform this initialization but once. This code
8019 static int temp = 0;
8021 // Do initialization.
8023 // Register variable for destruction at end of program.
8026 Note that the `temp' variable is only set to 1 *after* the
8027 initialization is complete. This ensures that an exception,
8028 thrown during the construction, will cause the variable to
8029 reinitialized when we pass through this code again, as per:
8033 If the initialization exits by throwing an exception, the
8034 initialization is not complete, so it will be tried again
8035 the next time control enters the declaration.
8037 In theory, this process should be thread-safe, too; multiple
8038 threads should not be able to initialize the variable more
8039 than once. We don't yet attempt to ensure thread-safety. */
8040 temp
= get_temp_name (integer_type_node
, 1);
8041 rest_of_decl_compilation (temp
, NULL_PTR
, 0, 0);
8043 /* Begin the conditional initialization. */
8044 if_stmt
= begin_if_stmt ();
8045 finish_if_stmt_cond (build_binary_op (EQ_EXPR
, temp
,
8048 then_clause
= begin_compound_stmt (/*has_no_scope=*/0);
8050 /* Do the initialization itself. */
8051 if (TYPE_NEEDS_CONSTRUCTING (TREE_TYPE (decl
))
8052 || (init
&& TREE_CODE (init
) == TREE_LIST
))
8053 assignment
= build_aggr_init (decl
, init
, 0);
8055 /* The initialization we're doing here is just a bitwise
8057 assignment
= build (INIT_EXPR
, TREE_TYPE (decl
), decl
, init
);
8059 assignment
= NULL_TREE
;
8061 /* Once the assignment is complete, set TEMP to 1. Since the
8062 construction of the static object is complete at this point,
8063 we want to make sure TEMP is set to 1 even if a temporary
8064 constructed during the initialization throws an exception
8065 when it is destroyed. So, we combine the initialization and
8066 the assignment to TEMP into a single expression, ensuring
8067 that when we call finish_expr_stmt the cleanups will not be
8068 run until after TEMP is set to 1. */
8069 temp_init
= build_modify_expr (temp
, NOP_EXPR
, integer_one_node
);
8072 assignment
= tree_cons (NULL_TREE
, assignment
,
8073 build_tree_list (NULL_TREE
,
8075 assignment
= build_compound_expr (assignment
);
8078 assignment
= temp_init
;
8079 finish_expr_stmt (assignment
);
8081 /* Use atexit to register a function for destroying this static
8083 if (TYPE_NEEDS_DESTRUCTOR (TREE_TYPE (decl
)))
8084 destroy_local_static (decl
);
8086 finish_compound_stmt (/*has_no_scope=*/0, then_clause
);
8087 finish_then_clause (if_stmt
);
8090 /* Resume old (possibly temporary) allocation. */
8095 /* This code takes into account memory allocation policy of
8096 `start_decl'. Namely, if TYPE_NEEDS_CONSTRUCTING does not
8097 hold for this object, then we must make permanent the storage
8098 currently in the temporary obstack. */
8099 if (!TYPE_NEEDS_CONSTRUCTING (TREE_TYPE (decl
)))
8100 preserve_initializer ();
8101 static_aggregates
= tree_cons (init
, decl
, static_aggregates
);
8105 /* Finish the declaration of a catch-parameter. */
8108 start_handler_parms (declspecs
, declarator
)
8115 decl
= grokdeclarator (declarator
, declspecs
, CATCHPARM
,
8117 if (decl
== NULL_TREE
)
8118 error ("invalid catch parameter");
8127 /* Make TYPE a complete type based on INITIAL_VALUE.
8128 Return 0 if successful, 1 if INITIAL_VALUE can't be deciphered,
8129 2 if there was no information (in which case assume 0 if DO_DEFAULT). */
8132 complete_array_type (type
, initial_value
, do_default
)
8133 tree type
, initial_value
;
8136 register tree maxindex
= NULL_TREE
;
8139 /* Allocate on the same obstack as TYPE. */
8140 push_obstacks (TYPE_OBSTACK (type
), TYPE_OBSTACK (type
));
8144 /* Note MAXINDEX is really the maximum index,
8145 one less than the size. */
8146 if (TREE_CODE (initial_value
) == STRING_CST
)
8149 = int_size_in_bytes (TREE_TYPE (TREE_TYPE (initial_value
)));
8150 maxindex
= build_int_2 ((TREE_STRING_LENGTH (initial_value
)
8153 else if (TREE_CODE (initial_value
) == CONSTRUCTOR
)
8155 tree elts
= CONSTRUCTOR_ELTS (initial_value
);
8156 maxindex
= size_binop (MINUS_EXPR
, integer_zero_node
, size_one_node
);
8157 for (; elts
; elts
= TREE_CHAIN (elts
))
8159 if (TREE_PURPOSE (elts
))
8160 maxindex
= TREE_PURPOSE (elts
);
8162 maxindex
= size_binop (PLUS_EXPR
, maxindex
, size_one_node
);
8164 maxindex
= copy_node (maxindex
);
8168 /* Make an error message unless that happened already. */
8169 if (initial_value
!= error_mark_node
)
8172 initial_value
= NULL_TREE
;
8174 /* Prevent further error messages. */
8175 maxindex
= build_int_2 (0, 0);
8182 maxindex
= build_int_2 (0, 0);
8191 domain
= build_index_type (maxindex
);
8192 TYPE_DOMAIN (type
) = domain
;
8194 if (! TREE_TYPE (maxindex
))
8195 TREE_TYPE (maxindex
) = domain
;
8197 itype
= TREE_TYPE (initial_value
);
8200 if (itype
&& !TYPE_DOMAIN (itype
))
8201 TYPE_DOMAIN (itype
) = domain
;
8202 /* The type of the main variant should never be used for arrays
8203 of different sizes. It should only ever be completed with the
8204 size of the array. */
8205 if (! TYPE_DOMAIN (TYPE_MAIN_VARIANT (type
)))
8206 TYPE_DOMAIN (TYPE_MAIN_VARIANT (type
)) = domain
;
8211 /* Lay out the type now that we can get the real answer. */
8218 /* Return zero if something is declared to be a member of type
8219 CTYPE when in the context of CUR_TYPE. STRING is the error
8220 message to print in that case. Otherwise, quietly return 1. */
8223 member_function_or_else (ctype
, cur_type
, string
)
8224 tree ctype
, cur_type
;
8227 if (ctype
&& ctype
!= cur_type
)
8229 error (string
, TYPE_NAME_STRING (ctype
));
8235 /* Subroutine of `grokdeclarator'. */
8237 /* Generate errors possibly applicable for a given set of specifiers.
8238 This is for ARM $7.1.2. */
8241 bad_specifiers (object
, type
, virtualp
, quals
, inlinep
, friendp
, raises
)
8244 int virtualp
, quals
, friendp
, raises
, inlinep
;
8247 cp_error ("`%D' declared as a `virtual' %s", object
, type
);
8249 cp_error ("`%D' declared as an `inline' %s", object
, type
);
8251 cp_error ("`const' and `volatile' function specifiers on `%D' invalid in %s declaration",
8254 cp_error_at ("`%D' declared as a friend", object
);
8256 cp_error_at ("`%D' declared with an exception specification", object
);
8259 /* CTYPE is class type, or null if non-class.
8260 TYPE is type this FUNCTION_DECL should have, either FUNCTION_TYPE
8262 DECLARATOR is the function's name.
8263 VIRTUALP is truthvalue of whether the function is virtual or not.
8264 FLAGS are to be passed through to `grokclassfn'.
8265 QUALS are qualifiers indicating whether the function is `const'
8267 RAISES is a list of exceptions that this function can raise.
8268 CHECK is 1 if we must find this method in CTYPE, 0 if we should
8269 not look, and -1 if we should not call `grokclassfn' at all.
8271 Returns `NULL_TREE' if something goes wrong, after issuing
8272 applicable error messages. */
8275 grokfndecl (ctype
, type
, declarator
, orig_declarator
, virtualp
, flags
, quals
,
8276 raises
, check
, friendp
, publicp
, inlinep
, funcdef_flag
,
8277 template_count
, in_namespace
)
8280 tree orig_declarator
;
8282 enum overload_flags flags
;
8284 int check
, friendp
, publicp
, inlinep
, funcdef_flag
, template_count
;
8288 int staticp
= ctype
&& TREE_CODE (type
) == FUNCTION_TYPE
;
8289 int has_default_arg
= 0;
8293 cname
= TREE_CODE (TYPE_NAME (ctype
)) == TYPE_DECL
8294 ? TYPE_IDENTIFIER (ctype
) : TYPE_NAME (ctype
);
8300 type
= build_exception_variant (type
, raises
);
8303 decl
= build_lang_decl (FUNCTION_DECL
, declarator
, type
);
8304 /* Propagate volatile out from type to decl. */
8305 if (TYPE_VOLATILE (type
))
8306 TREE_THIS_VOLATILE (decl
) = 1;
8308 /* If this decl has namespace scope, set that up. */
8310 set_decl_namespace (decl
, in_namespace
, friendp
);
8311 else if (publicp
&& ! ctype
)
8312 DECL_CONTEXT (decl
) = FROB_CONTEXT (current_namespace
);
8314 /* `main' and builtins have implicit 'C' linkage. */
8315 if ((MAIN_NAME_P (declarator
)
8316 || (IDENTIFIER_LENGTH (declarator
) > 10
8317 && IDENTIFIER_POINTER (declarator
)[0] == '_'
8318 && IDENTIFIER_POINTER (declarator
)[1] == '_'
8319 && strncmp (IDENTIFIER_POINTER (declarator
)+2, "builtin_", 8) == 0))
8320 && current_lang_name
== lang_name_cplusplus
8321 && ctype
== NULL_TREE
8322 /* NULL_TREE means global namespace. */
8323 && DECL_CONTEXT (decl
) == NULL_TREE
)
8324 DECL_LANGUAGE (decl
) = lang_c
;
8326 /* Should probably propagate const out from type to decl I bet (mrs). */
8329 DECL_STATIC_FUNCTION_P (decl
) = 1;
8330 DECL_CONTEXT (decl
) = ctype
;
8334 DECL_CLASS_CONTEXT (decl
) = ctype
;
8336 if (ctype
== NULL_TREE
&& DECL_MAIN_P (decl
))
8338 if (processing_template_decl
)
8339 error ("cannot declare `main' to be a template");
8341 error ("cannot declare `main' to be inline");
8343 error ("cannot declare `main' to be static");
8348 /* Members of anonymous types and local classes have no linkage; make
8350 if (ctype
&& (ANON_AGGRNAME_P (TYPE_IDENTIFIER (ctype
))
8351 || hack_decl_function_context (TYPE_MAIN_DECL (ctype
))))
8356 /* [basic.link]: A name with no linkage (notably, the name of a class
8357 or enumeration declared in a local scope) shall not be used to
8358 declare an entity with linkage.
8360 Only check this for public decls for now. */
8361 t
= no_linkage_check (TREE_TYPE (decl
));
8364 if (ANON_AGGRNAME_P (TYPE_IDENTIFIER (t
)))
8366 if (DECL_LANGUAGE (decl
) == lang_c
)
8367 /* Allow this; it's pretty common in C. */;
8369 cp_pedwarn ("non-local function `%#D' uses anonymous type",
8373 cp_pedwarn ("non-local function `%#D' uses local type `%T'",
8378 TREE_PUBLIC (decl
) = publicp
;
8381 DECL_INTERFACE_KNOWN (decl
) = 1;
8382 DECL_NOT_REALLY_EXTERN (decl
) = 1;
8386 DECL_THIS_INLINE (decl
) = DECL_INLINE (decl
) = 1;
8388 DECL_EXTERNAL (decl
) = 1;
8389 if (quals
!= NULL_TREE
&& TREE_CODE (type
) == FUNCTION_TYPE
)
8391 cp_error ("%smember function `%D' cannot have `%T' method qualifier",
8392 (ctype
? "static " : "non-"), decl
, TREE_VALUE (quals
));
8396 if (IDENTIFIER_OPNAME_P (DECL_NAME (decl
)))
8397 grok_op_properties (decl
, virtualp
, check
< 0);
8399 if (ctype
&& hack_decl_function_context (decl
))
8400 DECL_NO_STATIC_CHAIN (decl
) = 1;
8402 for (t
= TYPE_ARG_TYPES (TREE_TYPE (decl
)); t
; t
= TREE_CHAIN (t
))
8403 if (TREE_PURPOSE (t
)
8404 && TREE_CODE (TREE_PURPOSE (t
)) == DEFAULT_ARG
)
8406 has_default_arg
= 1;
8411 && TREE_CODE (orig_declarator
) == TEMPLATE_ID_EXPR
)
8415 ("defining explicit specialization `%D' in friend declaration",
8419 if (PROCESSING_REAL_TEMPLATE_DECL_P ())
8421 /* Something like `template <class T> friend void f<T>()'. */
8422 cp_error ("template-id `%D' in declaration of primary template",
8428 /* A friend declaration of the form friend void f<>(). Record
8429 the information in the TEMPLATE_ID_EXPR. */
8430 SET_DECL_IMPLICIT_INSTANTIATION (decl
);
8431 DECL_TEMPLATE_INFO (decl
)
8432 = tree_cons (TREE_OPERAND (orig_declarator
, 0),
8433 TREE_OPERAND (orig_declarator
, 1),
8436 if (has_default_arg
)
8438 cp_error ("default arguments are not allowed in declaration of friend template specialization `%D'",
8445 cp_error ("`inline' is not allowed in declaration of friend template specialization `%D'",
8452 if (has_default_arg
)
8453 add_defarg_fn (decl
);
8455 /* Plain overloading: will not be grok'd by grokclassfn. */
8456 if (! ctype
&& ! processing_template_decl
8457 && DECL_LANGUAGE (decl
) != lang_c
8458 && (! DECL_USE_TEMPLATE (decl
) || name_mangling_version
< 1))
8459 set_mangled_name_for_decl (decl
);
8462 /* Make the init_value nonzero so pushdecl knows this is not
8463 tentative. error_mark_node is replaced later with the BLOCK. */
8464 DECL_INITIAL (decl
) = error_mark_node
;
8466 /* Caller will do the rest of this. */
8470 if (check
&& funcdef_flag
)
8471 DECL_INITIAL (decl
) = error_mark_node
;
8473 if (flags
== NO_SPECIAL
&& ctype
&& constructor_name (cname
) == declarator
)
8476 /* Just handle constructors here. We could do this
8477 inside the following if stmt, but I think
8478 that the code is more legible by breaking this
8479 case out. See comments below for what each of
8480 the following calls is supposed to do. */
8481 DECL_CONSTRUCTOR_P (decl
) = 1;
8483 grokclassfn (ctype
, decl
, flags
, quals
);
8485 decl
= check_explicit_specialization (orig_declarator
, decl
,
8487 2 * (funcdef_flag
!= 0) +
8488 4 * (friendp
!= 0));
8489 if (decl
== error_mark_node
)
8492 if ((! TYPE_FOR_JAVA (ctype
) || check_java_method (decl
))
8495 tmp
= check_classfn (ctype
, decl
);
8497 if (tmp
&& TREE_CODE (tmp
) == TEMPLATE_DECL
)
8498 tmp
= DECL_TEMPLATE_RESULT(tmp
);
8500 if (tmp
&& DECL_ARTIFICIAL (tmp
))
8501 cp_error ("definition of implicitly-declared `%D'", tmp
);
8502 if (tmp
&& duplicate_decls (decl
, tmp
))
8505 if (! grok_ctor_properties (ctype
, decl
))
8512 /* Function gets the ugly name, field gets the nice one.
8513 This call may change the type of the function (because
8514 of default parameters)! */
8515 if (ctype
!= NULL_TREE
)
8516 grokclassfn (ctype
, decl
, flags
, quals
);
8518 decl
= check_explicit_specialization (orig_declarator
, decl
,
8520 2 * (funcdef_flag
!= 0) +
8521 4 * (friendp
!= 0));
8522 if (decl
== error_mark_node
)
8525 if (ctype
!= NULL_TREE
8526 && (! TYPE_FOR_JAVA (ctype
) || check_java_method (decl
))
8529 tmp
= check_classfn (ctype
, decl
);
8531 if (tmp
&& TREE_CODE (tmp
) == TEMPLATE_DECL
)
8532 tmp
= DECL_TEMPLATE_RESULT (tmp
);
8534 if (tmp
&& DECL_STATIC_FUNCTION_P (tmp
)
8535 && TREE_CODE (TREE_TYPE (decl
)) == METHOD_TYPE
)
8537 /* Remove the `this' parm added by grokclassfn.
8538 XXX Isn't this done in start_function, too? */
8539 revert_static_member_fn (&decl
, NULL
, NULL
);
8540 last_function_parms
= TREE_CHAIN (last_function_parms
);
8542 if (tmp
&& DECL_ARTIFICIAL (tmp
))
8543 cp_error ("definition of implicitly-declared `%D'", tmp
);
8546 /* Attempt to merge the declarations. This can fail, in
8547 the case of some illegal specialization declarations. */
8548 if (!duplicate_decls (decl
, tmp
))
8549 cp_error ("no `%#D' member function declared in class `%T'",
8555 if (ctype
== NULL_TREE
|| check
)
8560 DECL_VIRTUAL_P (decl
) = 1;
8561 if (DECL_VINDEX (decl
) == NULL_TREE
)
8562 DECL_VINDEX (decl
) = error_mark_node
;
8563 IDENTIFIER_VIRTUAL_P (DECL_NAME (decl
)) = 1;
8570 grokvardecl (type
, declarator
, specbits_in
, initialized
, constp
, in_namespace
)
8573 RID_BIT_TYPE
*specbits_in
;
8579 RID_BIT_TYPE specbits
;
8581 specbits
= *specbits_in
;
8583 if (TREE_CODE (type
) == OFFSET_TYPE
)
8585 /* If you declare a static member so that it
8586 can be initialized, the code will reach here. */
8587 tree basetype
= TYPE_OFFSET_BASETYPE (type
);
8588 type
= TREE_TYPE (type
);
8589 decl
= build_lang_decl (VAR_DECL
, declarator
, type
);
8590 DECL_CONTEXT (decl
) = basetype
;
8591 DECL_CLASS_CONTEXT (decl
) = basetype
;
8592 DECL_ASSEMBLER_NAME (decl
) = build_static_name (basetype
, declarator
);
8599 context
= in_namespace
;
8600 else if (namespace_bindings_p () || RIDBIT_SETP (RID_EXTERN
, specbits
))
8601 context
= current_namespace
;
8603 context
= NULL_TREE
;
8605 if (processing_template_decl
)
8607 /* If we're in a template, we need DECL_LANG_SPECIFIC so that
8608 we can call push_template_decl. */
8609 push_permanent_obstack ();
8610 decl
= build_lang_decl (VAR_DECL
, declarator
, type
);
8614 decl
= build_decl (VAR_DECL
, declarator
, type
);
8617 set_decl_namespace (decl
, context
, 0);
8619 context
= DECL_CONTEXT (decl
);
8620 if (declarator
&& context
&& current_lang_name
!= lang_name_c
)
8621 DECL_ASSEMBLER_NAME (decl
) = build_static_name (context
, declarator
);
8625 set_decl_namespace (decl
, in_namespace
, 0);
8627 if (RIDBIT_SETP (RID_EXTERN
, specbits
))
8629 DECL_THIS_EXTERN (decl
) = 1;
8630 DECL_EXTERNAL (decl
) = !initialized
;
8633 /* In class context, static means one per class,
8634 public access, and static storage. */
8635 if (DECL_CLASS_SCOPE_P (decl
))
8637 TREE_PUBLIC (decl
) = 1;
8638 TREE_STATIC (decl
) = 1;
8639 DECL_EXTERNAL (decl
) = 0;
8641 /* At top level, either `static' or no s.c. makes a definition
8642 (perhaps tentative), and absence of `static' makes it public. */
8643 else if (toplevel_bindings_p ())
8645 TREE_PUBLIC (decl
) = (RIDBIT_NOTSETP (RID_STATIC
, specbits
)
8646 && (DECL_THIS_EXTERN (decl
) || ! constp
));
8647 TREE_STATIC (decl
) = ! DECL_EXTERNAL (decl
);
8649 /* Not at top level, only `static' makes a static definition. */
8652 TREE_STATIC (decl
) = !! RIDBIT_SETP (RID_STATIC
, specbits
);
8653 TREE_PUBLIC (decl
) = DECL_EXTERNAL (decl
);
8656 if (TREE_PUBLIC (decl
))
8658 /* [basic.link]: A name with no linkage (notably, the name of a class
8659 or enumeration declared in a local scope) shall not be used to
8660 declare an entity with linkage.
8662 Only check this for public decls for now. */
8663 tree t
= no_linkage_check (TREE_TYPE (decl
));
8666 if (ANON_AGGRNAME_P (TYPE_IDENTIFIER (t
)))
8667 /* Ignore for now; `enum { foo } e' is pretty common. */;
8669 cp_pedwarn ("non-local variable `%#D' uses local type `%T'",
8677 /* Create and return a canonical pointer to member function type, for
8678 TYPE, which is a POINTER_TYPE to a METHOD_TYPE. */
8681 build_ptrmemfunc_type (type
)
8687 tree unqualified_variant
= NULL_TREE
;
8689 /* If a canonical type already exists for this type, use it. We use
8690 this method instead of type_hash_canon, because it only does a
8691 simple equality check on the list of field members. */
8693 if ((t
= TYPE_GET_PTRMEMFUNC_TYPE (type
)))
8696 /* Make sure that we always have the unqualified pointer-to-member
8698 if (CP_TYPE_QUALS (type
) != TYPE_UNQUALIFIED
)
8700 = build_ptrmemfunc_type (TYPE_MAIN_VARIANT (type
));
8702 push_obstacks (TYPE_OBSTACK (type
), TYPE_OBSTACK (type
));
8704 u
= make_lang_type (UNION_TYPE
);
8705 SET_IS_AGGR_TYPE (u
, 0);
8706 fields
[0] = build_lang_decl (FIELD_DECL
, pfn_identifier
, type
);
8707 fields
[1] = build_lang_decl (FIELD_DECL
, delta2_identifier
,
8709 finish_builtin_type (u
, "__ptrmemfunc_type", fields
, 1, ptr_type_node
);
8710 TYPE_NAME (u
) = NULL_TREE
;
8712 t
= make_lang_type (RECORD_TYPE
);
8714 /* Let the front-end know this is a pointer to member function... */
8715 TYPE_PTRMEMFUNC_FLAG (t
) = 1;
8716 /* ... and not really an aggregate. */
8717 SET_IS_AGGR_TYPE (t
, 0);
8719 fields
[0] = build_lang_decl (FIELD_DECL
, delta_identifier
,
8721 fields
[1] = build_lang_decl (FIELD_DECL
, index_identifier
,
8723 fields
[2] = build_lang_decl (FIELD_DECL
, pfn_or_delta2_identifier
, u
);
8724 finish_builtin_type (t
, "__ptrmemfunc_type", fields
, 2, ptr_type_node
);
8728 /* Zap out the name so that the back-end will give us the debugging
8729 information for this anonymous RECORD_TYPE. */
8730 TYPE_NAME (t
) = NULL_TREE
;
8732 /* If this is not the unqualified form of this pointer-to-member
8733 type, set the TYPE_MAIN_VARIANT for this type to be the
8734 unqualified type. Since they are actually RECORD_TYPEs that are
8735 not variants of each other, we must do this manually. */
8736 if (CP_TYPE_QUALS (type
) != TYPE_UNQUALIFIED
)
8738 t
= build_qualified_type (t
, CP_TYPE_QUALS (type
));
8739 TYPE_MAIN_VARIANT (t
) = unqualified_variant
;
8740 TYPE_NEXT_VARIANT (t
) = TYPE_NEXT_VARIANT (unqualified_variant
);
8741 TYPE_NEXT_VARIANT (unqualified_variant
) = t
;
8744 /* Cache this pointer-to-member type so that we can find it again
8746 TYPE_SET_PTRMEMFUNC_TYPE (type
, t
);
8748 /* Seems to be wanted. */
8749 CLASSTYPE_GOT_SEMICOLON (t
) = 1;
8754 /* DECL is a VAR_DECL defined in-class, whose TYPE is also given.
8755 Check to see that the definition is valid. Issue appropriate error
8756 messages. Return 1 if the definition is particularly bad, or 0
8760 check_static_variable_definition (decl
, type
)
8764 /* Motion 10 at San Diego: If a static const integral data member is
8765 initialized with an integral constant expression, the initializer
8766 may appear either in the declaration (within the class), or in
8767 the definition, but not both. If it appears in the class, the
8768 member is a member constant. The file-scope definition is always
8770 if (CLASS_TYPE_P (type
) || TREE_CODE (type
) == REFERENCE_TYPE
)
8772 cp_error ("in-class initialization of static data member of non-integral type `%T'",
8774 /* If we just return the declaration, crashes will sometimes
8775 occur. We therefore return void_type_node, as if this was a
8776 friend declaration, to cause callers to completely ignore
8777 this declaration. */
8780 else if (!CP_TYPE_CONST_P (type
))
8781 cp_error ("ANSI C++ forbids in-class initialization of non-const static member `%D'",
8783 else if (pedantic
&& !INTEGRAL_TYPE_P (type
))
8784 cp_pedwarn ("ANSI C++ forbids initialization of member constant `%D' of non-integral type `%T'", decl
, type
);
8789 /* Given declspecs and a declarator,
8790 determine the name and type of the object declared
8791 and construct a ..._DECL node for it.
8792 (In one case we can return a ..._TYPE node instead.
8793 For invalid input we sometimes return 0.)
8795 DECLSPECS is a chain of tree_list nodes whose value fields
8796 are the storage classes and type specifiers.
8798 DECL_CONTEXT says which syntactic context this declaration is in:
8799 NORMAL for most contexts. Make a VAR_DECL or FUNCTION_DECL or TYPE_DECL.
8800 FUNCDEF for a function definition. Like NORMAL but a few different
8801 error messages in each case. Return value may be zero meaning
8802 this definition is too screwy to try to parse.
8803 MEMFUNCDEF for a function definition. Like FUNCDEF but prepares to
8804 handle member functions (which have FIELD context).
8805 Return value may be zero meaning this definition is too screwy to
8807 PARM for a parameter declaration (either within a function prototype
8808 or before a function body). Make a PARM_DECL, or return void_type_node.
8809 CATCHPARM for a parameter declaration before a catch clause.
8810 TYPENAME if for a typename (in a cast or sizeof).
8811 Don't make a DECL node; just return the ..._TYPE node.
8812 FIELD for a struct or union field; make a FIELD_DECL.
8813 BITFIELD for a field with specified width.
8814 INITIALIZED is 1 if the decl has an initializer.
8816 ATTRLIST is a TREE_LIST node with prefix attributes in TREE_VALUE and
8817 normal attributes in TREE_PURPOSE, or NULL_TREE.
8819 In the TYPENAME case, DECLARATOR is really an absolute declarator.
8820 It may also be so in the PARM case, for a prototype where the
8821 argument type is specified but not the name.
8823 This function is where the complicated C meanings of `static'
8824 and `extern' are interpreted.
8826 For C++, if there is any monkey business to do, the function which
8827 calls this one must do it, i.e., prepending instance variables,
8828 renaming overloaded function names, etc.
8830 Note that for this C++, it is an error to define a method within a class
8831 which does not belong to that class.
8833 Except in the case where SCOPE_REFs are implicitly known (such as
8834 methods within a class being redundantly qualified),
8835 declarations which involve SCOPE_REFs are returned as SCOPE_REFs
8836 (class_name::decl_name). The caller must also deal with this.
8838 If a constructor or destructor is seen, and the context is FIELD,
8839 then the type gains the attribute TREE_HAS_x. If such a declaration
8840 is erroneous, NULL_TREE is returned.
8842 QUALS is used only for FUNCDEF and MEMFUNCDEF cases. For a member
8843 function, these are the qualifiers to give to the `this' pointer.
8845 May return void_type_node if the declarator turned out to be a friend.
8846 See grokfield for details. */
8848 enum return_types
{ return_normal
, return_ctor
, return_dtor
, return_conversion
};
8851 grokdeclarator (declarator
, declspecs
, decl_context
, initialized
, attrlist
)
8854 enum decl_context decl_context
;
8858 RID_BIT_TYPE specbits
;
8861 tree type
= NULL_TREE
;
8867 int virtualp
, explicitp
, friendp
, inlinep
, staticp
;
8868 int explicit_int
= 0;
8869 int explicit_char
= 0;
8870 int defaulted_int
= 0;
8871 tree typedef_decl
= NULL_TREE
;
8873 tree typedef_type
= NULL_TREE
;
8874 int funcdef_flag
= 0;
8875 enum tree_code innermost_code
= ERROR_MARK
;
8878 /* See the code below that used this. */
8879 tree decl_machine_attr
= NULL_TREE
;
8881 /* Set this to error_mark_node for FIELD_DECLs we could not handle properly.
8882 All FIELD_DECLs we build here have `init' put into their DECL_INITIAL. */
8883 tree init
= NULL_TREE
;
8885 /* Keep track of what sort of function is being processed
8886 so that we can warn about default return values, or explicit
8887 return values which do not match prescribed defaults. */
8888 enum return_types return_type
= return_normal
;
8890 tree dname
= NULL_TREE
;
8891 tree ctype
= current_class_type
;
8892 tree ctor_return_type
= NULL_TREE
;
8893 enum overload_flags flags
= NO_SPECIAL
;
8894 tree quals
= NULL_TREE
;
8895 tree raises
= NULL_TREE
;
8896 int template_count
= 0;
8897 tree in_namespace
= NULL_TREE
;
8901 RIDBIT_RESET_ALL (specbits
);
8902 if (decl_context
== FUNCDEF
)
8903 funcdef_flag
= 1, decl_context
= NORMAL
;
8904 else if (decl_context
== MEMFUNCDEF
)
8905 funcdef_flag
= -1, decl_context
= FIELD
;
8906 else if (decl_context
== BITFIELD
)
8907 bitfield
= 1, decl_context
= FIELD
;
8909 /* Look inside a declarator for the name being declared
8910 and get it as a string, for an error message. */
8912 tree
*next
= &declarator
;
8916 while (next
&& *next
)
8919 switch (TREE_CODE (decl
))
8922 /* For attributes. */
8923 next
= &TREE_VALUE (decl
);
8928 next
= &TREE_OPERAND (decl
, 0);
8931 case BIT_NOT_EXPR
: /* For C++ destructors! */
8933 tree name
= TREE_OPERAND (decl
, 0);
8934 tree rename
= NULL_TREE
;
8936 my_friendly_assert (flags
== NO_SPECIAL
, 152);
8938 return_type
= return_dtor
;
8939 if (TREE_CODE (name
) == TYPE_DECL
)
8940 TREE_OPERAND (decl
, 0) = name
= constructor_name (name
);
8941 my_friendly_assert (TREE_CODE (name
) == IDENTIFIER_NODE
, 153);
8942 if (ctype
== NULL_TREE
)
8944 if (current_class_type
== NULL_TREE
)
8946 error ("destructors must be member functions");
8951 tree t
= constructor_name (current_class_name
);
8958 tree t
= constructor_name (ctype
);
8965 cp_error ("destructor `%T' must match class name `%T'",
8967 TREE_OPERAND (decl
, 0) = rename
;
8973 case ADDR_EXPR
: /* C++ reference declaration */
8978 innermost_code
= TREE_CODE (decl
);
8979 next
= &TREE_OPERAND (decl
, 0);
8983 if (parmlist_is_exprlist (CALL_DECLARATOR_PARMS (decl
)))
8985 /* This is actually a variable declaration using
8986 constructor syntax. We need to call start_decl and
8987 cp_finish_decl so we can get the variable
8990 tree attributes
, prefix_attributes
;
8992 *next
= TREE_OPERAND (decl
, 0);
8993 init
= CALL_DECLARATOR_PARMS (decl
);
8997 attributes
= TREE_PURPOSE (attrlist
);
8998 prefix_attributes
= TREE_VALUE (attrlist
);
9002 attributes
= NULL_TREE
;
9003 prefix_attributes
= NULL_TREE
;
9006 decl
= start_decl (declarator
, declspecs
, 1,
9007 attributes
, prefix_attributes
);
9010 /* Look for __unused__ attribute */
9011 if (TREE_USED (TREE_TYPE (decl
)))
9012 TREE_USED (decl
) = 1;
9013 finish_decl (decl
, init
, NULL_TREE
);
9016 cp_error ("invalid declarator");
9019 innermost_code
= TREE_CODE (decl
);
9020 if (decl_context
== FIELD
&& ctype
== NULL_TREE
)
9021 ctype
= current_class_type
;
9023 && TREE_OPERAND (decl
, 0)
9024 && (TREE_CODE (TREE_OPERAND (decl
, 0)) == TYPE_DECL
9025 && ((DECL_NAME (TREE_OPERAND (decl
, 0))
9026 == constructor_name_full (ctype
))
9027 || (DECL_NAME (TREE_OPERAND (decl
, 0))
9028 == constructor_name (ctype
)))))
9029 TREE_OPERAND (decl
, 0) = constructor_name (ctype
);
9030 next
= &TREE_OPERAND (decl
, 0);
9032 if (ctype
!= NULL_TREE
9033 && decl
!= NULL_TREE
&& flags
!= DTOR_FLAG
9034 && decl
== constructor_name (ctype
))
9036 return_type
= return_ctor
;
9037 ctor_return_type
= ctype
;
9042 case TEMPLATE_ID_EXPR
:
9044 tree fns
= TREE_OPERAND (decl
, 0);
9046 if (TREE_CODE (fns
) == LOOKUP_EXPR
)
9047 fns
= TREE_OPERAND (fns
, 0);
9050 if (TREE_CODE (dname
) == COMPONENT_REF
)
9051 dname
= TREE_OPERAND (dname
, 1);
9052 if (TREE_CODE (dname
) != IDENTIFIER_NODE
)
9054 my_friendly_assert (is_overloaded_fn (dname
),
9056 dname
= DECL_NAME (get_first_fn (dname
));
9061 case IDENTIFIER_NODE
:
9062 if (TREE_CODE (decl
) == IDENTIFIER_NODE
)
9069 cp_error ("declarator-id missing; using reserved word `%D'",
9071 name
= IDENTIFIER_POINTER (dname
);
9073 if (! IDENTIFIER_OPNAME_P (dname
)
9074 /* GNU/Linux headers use '__op'. Arrgh. */
9075 || (IDENTIFIER_TYPENAME_P (dname
) && ! TREE_TYPE (dname
)))
9076 name
= IDENTIFIER_POINTER (dname
);
9079 if (IDENTIFIER_TYPENAME_P (dname
))
9081 my_friendly_assert (flags
== NO_SPECIAL
, 154);
9082 flags
= TYPENAME_FLAG
;
9083 ctor_return_type
= TREE_TYPE (dname
);
9084 return_type
= return_conversion
;
9086 name
= operator_name_string (dname
);
9093 /* Perform error checking, and decide on a ctype. */
9094 tree cname
= TREE_OPERAND (decl
, 0);
9095 if (cname
== NULL_TREE
)
9097 else if (TREE_CODE (cname
) == NAMESPACE_DECL
)
9100 in_namespace
= TREE_OPERAND (decl
, 0);
9101 TREE_OPERAND (decl
, 0) = NULL_TREE
;
9103 else if (! is_aggr_type (cname
, 1))
9104 TREE_OPERAND (decl
, 0) = NULL_TREE
;
9105 /* Must test TREE_OPERAND (decl, 1), in case user gives
9106 us `typedef (class::memfunc)(int); memfunc *memfuncptr;' */
9107 else if (TREE_OPERAND (decl
, 1)
9108 && TREE_CODE (TREE_OPERAND (decl
, 1)) == INDIRECT_REF
)
9110 else if (TREE_CODE (cname
) == TEMPLATE_TYPE_PARM
9111 || TREE_CODE (cname
) == TEMPLATE_TEMPLATE_PARM
)
9113 cp_error ("`%T::%D' is not a valid declarator", cname
,
9114 TREE_OPERAND (decl
, 1));
9115 cp_error (" perhaps you want `typename %T::%D' to make it a type",
9116 cname
, TREE_OPERAND (decl
, 1));
9117 return void_type_node
;
9119 else if (ctype
== NULL_TREE
)
9121 else if (TREE_COMPLEXITY (decl
) == current_class_depth
)
9122 TREE_OPERAND (decl
, 0) = ctype
;
9125 if (! UNIQUELY_DERIVED_FROM_P (cname
, ctype
))
9127 cp_error ("type `%T' is not derived from type `%T'",
9129 TREE_OPERAND (decl
, 0) = NULL_TREE
;
9135 if (ctype
&& TREE_CODE (TREE_OPERAND (decl
, 1)) == TYPE_DECL
9136 && ((DECL_NAME (TREE_OPERAND (decl
, 1))
9137 == constructor_name_full (ctype
))
9138 || (DECL_NAME (TREE_OPERAND (decl
, 1))
9139 == constructor_name (ctype
))))
9140 TREE_OPERAND (decl
, 1) = constructor_name (ctype
);
9141 next
= &TREE_OPERAND (decl
, 1);
9145 if (TREE_CODE (decl
) == IDENTIFIER_NODE
9146 && constructor_name (ctype
) == decl
)
9148 return_type
= return_ctor
;
9149 ctor_return_type
= ctype
;
9151 else if (TREE_CODE (decl
) == BIT_NOT_EXPR
9152 && TREE_CODE (TREE_OPERAND (decl
, 0)) == IDENTIFIER_NODE
9153 && (constructor_name (ctype
) == TREE_OPERAND (decl
, 0)
9154 || constructor_name_full (ctype
) == TREE_OPERAND (decl
, 0)))
9156 return_type
= return_dtor
;
9157 ctor_return_type
= ctype
;
9159 TREE_OPERAND (decl
, 0) = constructor_name (ctype
);
9160 next
= &TREE_OPERAND (decl
, 0);
9171 /* Parse error puts this typespec where
9172 a declarator should go. */
9173 cp_error ("`%T' specified as declarator-id", DECL_NAME (decl
));
9174 if (TREE_TYPE (decl
) == current_class_type
)
9175 cp_error (" perhaps you want `%T' for a constructor",
9176 current_class_name
);
9177 dname
= DECL_NAME (decl
);
9178 name
= IDENTIFIER_POINTER (dname
);
9180 /* Avoid giving two errors for this. */
9181 IDENTIFIER_CLASS_VALUE (dname
) = NULL_TREE
;
9183 declspecs
= temp_tree_cons (NULL_TREE
, integer_type_node
,
9190 cp_compiler_error ("`%D' as declarator", decl
);
9191 return 0; /* We used to do a 155 abort here. */
9196 /* A function definition's declarator must have the form of
9197 a function declarator. */
9199 if (funcdef_flag
&& innermost_code
!= CALL_EXPR
)
9202 if (((dname
&& IDENTIFIER_OPNAME_P (dname
)) || flags
== TYPENAME_FLAG
)
9203 && innermost_code
!= CALL_EXPR
9204 && ! (ctype
&& declspecs
== NULL_TREE
))
9206 cp_error ("declaration of `%D' as non-function", dname
);
9207 return void_type_node
;
9210 /* Anything declared one level down from the top level
9211 must be one of the parameters of a function
9212 (because the body is at least two levels down). */
9214 /* This heuristic cannot be applied to C++ nodes! Fixed, however,
9215 by not allowing C++ class definitions to specify their parameters
9216 with xdecls (must be spec.d in the parmlist).
9218 Since we now wait to push a class scope until we are sure that
9219 we are in a legitimate method context, we must set oldcname
9220 explicitly (since current_class_name is not yet alive).
9222 We also want to avoid calling this a PARM if it is in a namespace. */
9224 if (decl_context
== NORMAL
&& !toplevel_bindings_p ())
9226 struct binding_level
*b
= current_binding_level
;
9227 current_binding_level
= b
->level_chain
;
9228 if (current_binding_level
!= 0 && toplevel_bindings_p ())
9229 decl_context
= PARM
;
9230 current_binding_level
= b
;
9234 name
= decl_context
== PARM
? "parameter" : "type name";
9236 /* Look through the decl specs and record which ones appear.
9237 Some typespecs are defined as built-in typenames.
9238 Others, the ones that are modifiers of other types,
9239 are represented by bits in SPECBITS: set the bits for
9240 the modifiers that appear. Storage class keywords are also in SPECBITS.
9242 If there is a typedef name or a type, store the type in TYPE.
9243 This includes builtin typedefs such as `int'.
9245 Set EXPLICIT_INT if the type is `int' or `char' and did not
9246 come from a user typedef.
9248 Set LONGLONG if `long' is mentioned twice.
9250 For C++, constructors and destructors have their own fast treatment. */
9252 for (spec
= declspecs
; spec
; spec
= TREE_CHAIN (spec
))
9257 /* Certain parse errors slip through. For example,
9258 `int class;' is not caught by the parser. Try
9259 weakly to recover here. */
9260 if (TREE_CODE (spec
) != TREE_LIST
)
9263 id
= TREE_VALUE (spec
);
9265 if (TREE_CODE (id
) == IDENTIFIER_NODE
)
9267 if (id
== ridpointers
[(int) RID_INT
]
9268 || id
== ridpointers
[(int) RID_CHAR
]
9269 || id
== ridpointers
[(int) RID_BOOL
]
9270 || id
== ridpointers
[(int) RID_WCHAR
])
9274 if (id
== ridpointers
[(int) RID_BOOL
])
9275 error ("`bool' is now a keyword");
9277 cp_error ("extraneous `%T' ignored", id
);
9281 if (id
== ridpointers
[(int) RID_INT
])
9283 else if (id
== ridpointers
[(int) RID_CHAR
])
9285 type
= TREE_TYPE (IDENTIFIER_GLOBAL_VALUE (id
));
9289 /* C++ aggregate types. */
9290 if (IDENTIFIER_HAS_TYPE_VALUE (id
))
9293 cp_error ("multiple declarations `%T' and `%T'", type
, id
);
9295 type
= IDENTIFIER_TYPE_VALUE (id
);
9299 for (i
= (int) RID_FIRST_MODIFIER
; i
<= (int) RID_LAST_MODIFIER
; i
++)
9301 if (ridpointers
[i
] == id
)
9303 if (i
== (int) RID_LONG
&& RIDBIT_SETP (i
, specbits
))
9305 if (pedantic
&& ! in_system_header
&& warn_long_long
)
9306 pedwarn ("ANSI C++ does not support `long long'");
9308 error ("`long long long' is too long for GCC");
9312 else if (RIDBIT_SETP (i
, specbits
))
9313 pedwarn ("duplicate `%s'", IDENTIFIER_POINTER (id
));
9314 RIDBIT_SET (i
, specbits
);
9319 /* C++ aggregate types. */
9320 else if (TREE_CODE (id
) == TYPE_DECL
|| TREE_CODE (id
) == TEMPLATE_DECL
)
9323 cp_error ("multiple declarations `%T' and `%T'", type
,
9327 type
= TREE_TYPE (id
);
9328 TREE_VALUE (spec
) = type
;
9333 error ("two or more data types in declaration of `%s'", name
);
9334 else if (TREE_CODE (id
) == IDENTIFIER_NODE
)
9336 register tree t
= lookup_name (id
, 1);
9337 if (!t
|| TREE_CODE (t
) != TYPE_DECL
)
9338 error ("`%s' fails to be a typedef or built in type",
9339 IDENTIFIER_POINTER (id
));
9342 type
= TREE_TYPE (t
);
9344 /* See the code below that used this. */
9345 decl_machine_attr
= DECL_MACHINE_ATTRIBUTES (id
);
9350 else if (id
!= error_mark_node
)
9351 /* Can't change CLASS nodes into RECORD nodes here! */
9357 typedef_type
= type
;
9359 /* No type at all: default to `int', and set DEFAULTED_INT
9360 because it was not a user-defined typedef. */
9362 if (type
== NULL_TREE
9363 && (RIDBIT_SETP (RID_SIGNED
, specbits
)
9364 || RIDBIT_SETP (RID_UNSIGNED
, specbits
)
9365 || RIDBIT_SETP (RID_LONG
, specbits
)
9366 || RIDBIT_SETP (RID_SHORT
, specbits
)))
9368 /* These imply 'int'. */
9369 type
= integer_type_node
;
9373 if (type
== NULL_TREE
)
9376 if (return_type
== return_dtor
)
9377 type
= void_type_node
;
9378 else if (return_type
== return_ctor
)
9379 type
= build_pointer_type (ctor_return_type
);
9380 else if (return_type
== return_conversion
)
9381 type
= ctor_return_type
;
9384 /* We handle `main' specially here, because 'main () { }' is so
9385 common. With no options, it is allowed. With -Wreturn-type,
9386 it is a warning. It is only an error with -pedantic-errors. */
9387 int is_main
= (funcdef_flag
9388 && MAIN_NAME_P (dname
)
9389 && ctype
== NULL_TREE
9390 && in_namespace
== NULL_TREE
9391 && current_namespace
== global_namespace
);
9393 if (in_system_header
|| flag_ms_extensions
)
9394 /* Allow it, sigh. */;
9395 else if (pedantic
|| ! is_main
)
9396 cp_pedwarn ("ANSI C++ forbids declaration of `%s' with no type",
9398 else if (warn_return_type
)
9399 cp_warning ("ANSI C++ forbids declaration of `%s' with no type",
9402 type
= integer_type_node
;
9405 else if (return_type
== return_dtor
)
9407 error ("return type specification for destructor invalid");
9408 type
= void_type_node
;
9410 else if (return_type
== return_ctor
)
9412 error ("return type specification for constructor invalid");
9413 type
= build_pointer_type (ctor_return_type
);
9415 else if (return_type
== return_conversion
)
9417 if (!same_type_p (type
, ctor_return_type
))
9418 cp_error ("operator `%T' declared to return `%T'",
9419 ctor_return_type
, type
);
9421 cp_pedwarn ("return type specified for `operator %T'",
9424 type
= ctor_return_type
;
9429 /* Now process the modifiers that were specified
9430 and check for invalid combinations. */
9432 /* Long double is a special combination. */
9434 if (RIDBIT_SETP (RID_LONG
, specbits
)
9435 && TYPE_MAIN_VARIANT (type
) == double_type_node
)
9437 RIDBIT_RESET (RID_LONG
, specbits
);
9438 type
= build_qualified_type (long_double_type_node
,
9439 CP_TYPE_QUALS (type
));
9442 /* Check all other uses of type modifiers. */
9444 if (RIDBIT_SETP (RID_UNSIGNED
, specbits
)
9445 || RIDBIT_SETP (RID_SIGNED
, specbits
)
9446 || RIDBIT_SETP (RID_LONG
, specbits
)
9447 || RIDBIT_SETP (RID_SHORT
, specbits
))
9451 if (TREE_CODE (type
) == REAL_TYPE
)
9452 error ("short, signed or unsigned invalid for `%s'", name
);
9453 else if (TREE_CODE (type
) != INTEGER_TYPE
)
9454 error ("long, short, signed or unsigned invalid for `%s'", name
);
9455 else if (RIDBIT_SETP (RID_LONG
, specbits
)
9456 && RIDBIT_SETP (RID_SHORT
, specbits
))
9457 error ("long and short specified together for `%s'", name
);
9458 else if ((RIDBIT_SETP (RID_LONG
, specbits
)
9459 || RIDBIT_SETP (RID_SHORT
, specbits
))
9461 error ("long or short specified with char for `%s'", name
);
9462 else if ((RIDBIT_SETP (RID_LONG
, specbits
)
9463 || RIDBIT_SETP (RID_SHORT
, specbits
))
9464 && TREE_CODE (type
) == REAL_TYPE
)
9465 error ("long or short specified with floating type for `%s'", name
);
9466 else if (RIDBIT_SETP (RID_SIGNED
, specbits
)
9467 && RIDBIT_SETP (RID_UNSIGNED
, specbits
))
9468 error ("signed and unsigned given together for `%s'", name
);
9472 if (!explicit_int
&& !defaulted_int
&& !explicit_char
&& pedantic
)
9474 pedwarn ("long, short, signed or unsigned used invalidly for `%s'",
9476 if (flag_pedantic_errors
)
9481 /* Discard the type modifiers if they are invalid. */
9484 RIDBIT_RESET (RID_UNSIGNED
, specbits
);
9485 RIDBIT_RESET (RID_SIGNED
, specbits
);
9486 RIDBIT_RESET (RID_LONG
, specbits
);
9487 RIDBIT_RESET (RID_SHORT
, specbits
);
9492 if (RIDBIT_SETP (RID_COMPLEX
, specbits
)
9493 && TREE_CODE (type
) != INTEGER_TYPE
&& TREE_CODE (type
) != REAL_TYPE
)
9495 error ("complex invalid for `%s'", name
);
9496 RIDBIT_RESET (RID_COMPLEX
, specbits
);
9499 /* Decide whether an integer type is signed or not.
9500 Optionally treat bitfields as signed by default. */
9501 if (RIDBIT_SETP (RID_UNSIGNED
, specbits
)
9504 It is implementation-defined whether a plain (neither
9505 explicitly signed or unsigned) char, short, int, or long
9506 bit-field is signed or unsigned.
9508 Naturally, we extend this to long long as well. Note that
9509 this does not include wchar_t. */
9510 || (bitfield
&& !flag_signed_bitfields
9511 && RIDBIT_NOTSETP (RID_SIGNED
, specbits
)
9512 /* A typedef for plain `int' without `signed' can be
9513 controlled just like plain `int', but a typedef for
9514 `signed int' cannot be so controlled. */
9516 && C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl
))
9517 && (TREE_CODE (type
) == INTEGER_TYPE
9518 || TREE_CODE (type
) == CHAR_TYPE
)
9519 && !same_type_p (TYPE_MAIN_VARIANT (type
), wchar_type_node
)))
9522 type
= long_long_unsigned_type_node
;
9523 else if (RIDBIT_SETP (RID_LONG
, specbits
))
9524 type
= long_unsigned_type_node
;
9525 else if (RIDBIT_SETP (RID_SHORT
, specbits
))
9526 type
= short_unsigned_type_node
;
9527 else if (type
== char_type_node
)
9528 type
= unsigned_char_type_node
;
9529 else if (typedef_decl
)
9530 type
= unsigned_type (type
);
9532 type
= unsigned_type_node
;
9534 else if (RIDBIT_SETP (RID_SIGNED
, specbits
)
9535 && type
== char_type_node
)
9536 type
= signed_char_type_node
;
9538 type
= long_long_integer_type_node
;
9539 else if (RIDBIT_SETP (RID_LONG
, specbits
))
9540 type
= long_integer_type_node
;
9541 else if (RIDBIT_SETP (RID_SHORT
, specbits
))
9542 type
= short_integer_type_node
;
9544 if (RIDBIT_SETP (RID_COMPLEX
, specbits
))
9546 /* If we just have "complex", it is equivalent to
9547 "complex double", but if any modifiers at all are specified it is
9548 the complex form of TYPE. E.g, "complex short" is
9549 "complex short int". */
9551 if (defaulted_int
&& ! longlong
9552 && ! (RIDBIT_SETP (RID_LONG
, specbits
)
9553 || RIDBIT_SETP (RID_SHORT
, specbits
)
9554 || RIDBIT_SETP (RID_SIGNED
, specbits
)
9555 || RIDBIT_SETP (RID_UNSIGNED
, specbits
)))
9556 type
= complex_double_type_node
;
9557 else if (type
== integer_type_node
)
9558 type
= complex_integer_type_node
;
9559 else if (type
== float_type_node
)
9560 type
= complex_float_type_node
;
9561 else if (type
== double_type_node
)
9562 type
= complex_double_type_node
;
9563 else if (type
== long_double_type_node
)
9564 type
= complex_long_double_type_node
;
9566 type
= build_complex_type (type
);
9569 if (return_type
== return_conversion
9570 && (RIDBIT_SETP (RID_CONST
, specbits
)
9571 || RIDBIT_SETP (RID_VOLATILE
, specbits
)
9572 || RIDBIT_SETP (RID_RESTRICT
, specbits
)))
9573 cp_error ("qualifiers are not allowed on declaration of `operator %T'",
9576 /* Set CONSTP if this declaration is `const', whether by
9577 explicit specification or via a typedef.
9578 Likewise for VOLATILEP. */
9580 constp
= !! RIDBIT_SETP (RID_CONST
, specbits
) + CP_TYPE_CONST_P (type
);
9582 !! RIDBIT_SETP (RID_RESTRICT
, specbits
) + CP_TYPE_RESTRICT_P (type
);
9584 !! RIDBIT_SETP (RID_VOLATILE
, specbits
) + CP_TYPE_VOLATILE_P (type
);
9585 type_quals
= ((constp
? TYPE_QUAL_CONST
: 0)
9586 | (restrictp
? TYPE_QUAL_RESTRICT
: 0)
9587 | (volatilep
? TYPE_QUAL_VOLATILE
: 0));
9588 type
= cp_build_qualified_type (type
, type_quals
);
9590 inlinep
= !! RIDBIT_SETP (RID_INLINE
, specbits
);
9591 virtualp
= RIDBIT_SETP (RID_VIRTUAL
, specbits
);
9592 RIDBIT_RESET (RID_VIRTUAL
, specbits
);
9593 explicitp
= RIDBIT_SETP (RID_EXPLICIT
, specbits
) != 0;
9594 RIDBIT_RESET (RID_EXPLICIT
, specbits
);
9596 if (RIDBIT_SETP (RID_STATIC
, specbits
))
9597 staticp
= 1 + (decl_context
== FIELD
);
9599 if (virtualp
&& staticp
== 2)
9601 cp_error ("member `%D' cannot be declared both virtual and static",
9605 friendp
= RIDBIT_SETP (RID_FRIEND
, specbits
);
9606 RIDBIT_RESET (RID_FRIEND
, specbits
);
9608 /* Warn if two storage classes are given. Default to `auto'. */
9610 if (RIDBIT_ANY_SET (specbits
))
9612 if (RIDBIT_SETP (RID_STATIC
, specbits
)) nclasses
++;
9613 if (RIDBIT_SETP (RID_EXTERN
, specbits
)) nclasses
++;
9614 if (decl_context
== PARM
&& nclasses
> 0)
9615 error ("storage class specifiers invalid in parameter declarations");
9616 if (RIDBIT_SETP (RID_TYPEDEF
, specbits
))
9618 if (decl_context
== PARM
)
9619 error ("typedef declaration invalid in parameter declaration");
9622 if (RIDBIT_SETP (RID_AUTO
, specbits
)) nclasses
++;
9623 if (RIDBIT_SETP (RID_REGISTER
, specbits
)) nclasses
++;
9626 /* Give error if `virtual' is used outside of class declaration. */
9628 && (current_class_name
== NULL_TREE
|| decl_context
!= FIELD
))
9630 error ("virtual outside class declaration");
9634 /* Static anonymous unions are dealt with here. */
9635 if (staticp
&& decl_context
== TYPENAME
9636 && TREE_CODE (declspecs
) == TREE_LIST
9637 && ANON_AGGR_TYPE_P (TREE_VALUE (declspecs
)))
9638 decl_context
= FIELD
;
9640 /* Warn about storage classes that are invalid for certain
9641 kinds of declarations (parameters, typenames, etc.). */
9644 error ("multiple storage classes in declaration of `%s'", name
);
9645 else if (decl_context
!= NORMAL
&& nclasses
> 0)
9647 if ((decl_context
== PARM
|| decl_context
== CATCHPARM
)
9648 && (RIDBIT_SETP (RID_REGISTER
, specbits
)
9649 || RIDBIT_SETP (RID_AUTO
, specbits
)))
9651 else if (RIDBIT_SETP (RID_TYPEDEF
, specbits
))
9653 else if (decl_context
== FIELD
9654 /* C++ allows static class elements */
9655 && RIDBIT_SETP (RID_STATIC
, specbits
))
9656 /* C++ also allows inlines and signed and unsigned elements,
9657 but in those cases we don't come in here. */
9661 if (decl_context
== FIELD
)
9663 tree tmp
= NULL_TREE
;
9664 register int op
= 0;
9668 /* Avoid trying to get an operand off an identifier node. */
9669 if (TREE_CODE (declarator
) == IDENTIFIER_NODE
)
9672 tmp
= TREE_OPERAND (declarator
, 0);
9673 op
= IDENTIFIER_OPNAME_P (tmp
);
9675 error ("storage class specified for %s `%s'",
9676 op
? "member operator" : "field",
9677 op
? operator_name_string (tmp
) : name
);
9680 error (((decl_context
== PARM
|| decl_context
== CATCHPARM
)
9681 ? "storage class specified for parameter `%s'"
9682 : "storage class specified for typename"), name
);
9683 RIDBIT_RESET (RID_REGISTER
, specbits
);
9684 RIDBIT_RESET (RID_AUTO
, specbits
);
9685 RIDBIT_RESET (RID_EXTERN
, specbits
);
9688 else if (RIDBIT_SETP (RID_EXTERN
, specbits
) && initialized
&& !funcdef_flag
)
9690 if (toplevel_bindings_p ())
9692 /* It's common practice (and completely valid) to have a const
9693 be initialized and declared extern. */
9694 if (!(type_quals
& TYPE_QUAL_CONST
))
9695 warning ("`%s' initialized and declared `extern'", name
);
9698 error ("`%s' has both `extern' and initializer", name
);
9700 else if (RIDBIT_SETP (RID_EXTERN
, specbits
) && funcdef_flag
9701 && ! toplevel_bindings_p ())
9702 error ("nested function `%s' declared `extern'", name
);
9703 else if (toplevel_bindings_p ())
9705 if (RIDBIT_SETP (RID_AUTO
, specbits
))
9706 error ("top-level declaration of `%s' specifies `auto'", name
);
9709 if (nclasses
> 0 && friendp
)
9710 error ("storage class specifiers invalid in friend function declarations");
9712 /* Now figure out the structure of the declarator proper.
9713 Descend through it, creating more complex types, until we reach
9714 the declared identifier (or NULL_TREE, in an absolute declarator). */
9716 inner_attrs
= NULL_TREE
;
9719 while (declarator
&& TREE_CODE (declarator
) != IDENTIFIER_NODE
9720 && TREE_CODE (declarator
) != TEMPLATE_ID_EXPR
)
9722 /* Each level of DECLARATOR is either an ARRAY_REF (for ...[..]),
9723 an INDIRECT_REF (for *...),
9724 a CALL_EXPR (for ...(...)),
9725 an identifier (for the name being declared)
9726 or a null pointer (for the place in an absolute declarator
9727 where the name was omitted).
9728 For the last two cases, we have just exited the loop.
9730 For C++ it could also be
9731 a SCOPE_REF (for class :: ...). In this case, we have converted
9732 sensible names to types, and those are the values we use to
9733 qualify the member name.
9734 an ADDR_EXPR (for &...),
9735 a BIT_NOT_EXPR (for destructors)
9737 At this point, TYPE is the type of elements of an array,
9738 or for a function to return, or for a pointer to point to.
9739 After this sequence of ifs, TYPE is the type of the
9740 array or function or pointer, and DECLARATOR has had its
9741 outermost layer removed. */
9743 if (type
== error_mark_node
)
9745 if (TREE_CODE (declarator
) == SCOPE_REF
)
9746 declarator
= TREE_OPERAND (declarator
, 1);
9748 declarator
= TREE_OPERAND (declarator
, 0);
9751 if (quals
!= NULL_TREE
9752 && (declarator
== NULL_TREE
9753 || TREE_CODE (declarator
) != SCOPE_REF
))
9755 if (ctype
== NULL_TREE
&& TREE_CODE (type
) == METHOD_TYPE
)
9756 ctype
= TYPE_METHOD_BASETYPE (type
);
9757 if (ctype
!= NULL_TREE
)
9759 tree dummy
= build_decl (TYPE_DECL
, NULL_TREE
, type
);
9760 ctype
= grok_method_quals (ctype
, dummy
, quals
);
9761 type
= TREE_TYPE (dummy
);
9766 /* See the comment for the TREE_LIST case, below. */
9769 else if (inner_attrs
)
9771 decl_attributes (type
, inner_attrs
, NULL_TREE
);
9772 inner_attrs
= NULL_TREE
;
9775 switch (TREE_CODE (declarator
))
9779 /* We encode a declarator with embedded attributes using
9780 a TREE_LIST. The attributes apply to the declarator
9781 directly inside them, so we have to skip an iteration
9782 before applying them to the type. If the declarator just
9783 inside is the declarator-id, we apply the attrs to the
9785 inner_attrs
= TREE_PURPOSE (declarator
);
9787 declarator
= TREE_VALUE (declarator
);
9793 register tree itype
= NULL_TREE
;
9794 register tree size
= TREE_OPERAND (declarator
, 1);
9795 /* The index is a signed object `sizetype' bits wide. */
9796 tree index_type
= signed_type (sizetype
);
9798 declarator
= TREE_OPERAND (declarator
, 0);
9800 /* Check for some types that there cannot be arrays of. */
9802 if (TREE_CODE (type
) == VOID_TYPE
)
9804 cp_error ("declaration of `%D' as array of voids", dname
);
9805 type
= error_mark_node
;
9808 if (TREE_CODE (type
) == FUNCTION_TYPE
)
9810 cp_error ("declaration of `%D' as array of functions", dname
);
9811 type
= error_mark_node
;
9814 /* ARM $8.4.3: Since you can't have a pointer to a reference,
9815 you can't have arrays of references. If we allowed them,
9816 then we'd be saying x[i] is valid for an array x, but
9817 then you'd have to ask: what does `*(x + i)' mean? */
9818 if (TREE_CODE (type
) == REFERENCE_TYPE
)
9820 if (decl_context
== TYPENAME
)
9821 cp_error ("cannot make arrays of references");
9823 cp_error ("declaration of `%D' as array of references",
9825 type
= error_mark_node
;
9828 if (TREE_CODE (type
) == OFFSET_TYPE
)
9830 cp_error ("declaration of `%D' as array of data members",
9832 type
= error_mark_node
;
9835 if (TREE_CODE (type
) == METHOD_TYPE
)
9837 cp_error ("declaration of `%D' as array of function members",
9839 type
= error_mark_node
;
9842 if (size
== error_mark_node
)
9843 type
= error_mark_node
;
9844 else if (TREE_CODE (type
) == ARRAY_TYPE
&& !TYPE_DOMAIN (type
))
9848 the constant expressions that specify the bounds of
9849 the arrays can be omitted only for the first member
9851 cp_error ("declaration of `%D' as multidimensional array",
9853 cp_error ("must have bounds for all dimensions except the first");
9854 type
= error_mark_node
;
9857 if (type
== error_mark_node
)
9860 /* VC++ spells a zero-sized array with []. */
9861 if (size
== NULL_TREE
&& decl_context
== FIELD
&& ! staticp
9862 && ! RIDBIT_SETP (RID_TYPEDEF
, specbits
))
9863 size
= integer_zero_node
;
9867 /* Must suspend_momentary here because the index
9868 type may need to live until the end of the function.
9869 For example, it is used in the declaration of a
9870 variable which requires destructing at the end of
9871 the function; then build_vec_delete will need this
9873 int yes
= suspend_momentary ();
9874 /* Might be a cast. */
9875 if (TREE_CODE (size
) == NOP_EXPR
9876 && TREE_TYPE (size
) == TREE_TYPE (TREE_OPERAND (size
, 0)))
9877 size
= TREE_OPERAND (size
, 0);
9878 if (TREE_READONLY_DECL_P (size
))
9879 size
= decl_constant_value (size
);
9881 /* If this involves a template parameter, it will be a
9882 constant at instantiation time, but we don't know
9883 what the value is yet. Even if no template
9884 parameters are involved, we may an expression that
9885 is not a constant; we don't even simplify `1 + 2'
9886 when processing a template. */
9887 if (processing_template_decl
)
9889 /* Resolve a qualified reference to an enumerator or
9890 static const data member of ours. */
9891 if (TREE_CODE (size
) == SCOPE_REF
9892 && TREE_OPERAND (size
, 0) == current_class_type
)
9894 tree t
= lookup_field (current_class_type
,
9895 TREE_OPERAND (size
, 1), 0, 0);
9900 itype
= build_index_type (build_min
9901 (MINUS_EXPR
, sizetype
, size
, integer_one_node
));
9902 goto dont_grok_size
;
9905 if (TREE_CODE (TREE_TYPE (size
)) != INTEGER_TYPE
9906 && TREE_CODE (TREE_TYPE (size
)) != ENUMERAL_TYPE
9907 && TREE_CODE (TREE_TYPE (size
)) != BOOLEAN_TYPE
)
9909 cp_error ("size of array `%D' has non-integer type",
9911 size
= integer_one_node
;
9913 if (pedantic
&& !in_system_header
&& integer_zerop (size
))
9914 cp_pedwarn ("ANSI C++ forbids zero-size array `%D'", dname
);
9915 if (TREE_CONSTANT (size
))
9917 int old_flag_pedantic_errors
= flag_pedantic_errors
;
9918 int old_pedantic
= pedantic
;
9919 pedantic
= flag_pedantic_errors
= 1;
9920 /* Always give overflow errors on array subscripts. */
9921 constant_expression_warning (size
);
9922 pedantic
= old_pedantic
;
9923 flag_pedantic_errors
= old_flag_pedantic_errors
;
9924 if (INT_CST_LT (size
, integer_zero_node
))
9926 cp_error ("size of array `%D' is negative", dname
);
9927 size
= integer_one_node
;
9935 cp_pedwarn ("ANSI C++ forbids variable-size array `%D'",
9938 cp_pedwarn ("ANSI C++ forbids variable-size array");
9943 = fold (build_binary_op (MINUS_EXPR
,
9944 cp_convert (index_type
, size
),
9945 cp_convert (index_type
,
9946 integer_one_node
)));
9947 if (! TREE_CONSTANT (itype
))
9948 itype
= variable_size (itype
);
9949 else if (TREE_OVERFLOW (itype
))
9951 error ("overflow in array dimension");
9952 TREE_OVERFLOW (itype
) = 0;
9955 itype
= build_index_type (itype
);
9958 resume_momentary (yes
);
9961 type
= build_cplus_array_type (type
, itype
);
9970 tree inner_parms
= CALL_DECLARATOR_PARMS (declarator
);
9971 tree inner_decl
= TREE_OPERAND (declarator
, 0);
9973 /* Declaring a function type.
9974 Make sure we have a valid type for the function to return. */
9976 /* We now know that the TYPE_QUALS don't apply to the
9977 decl, but to its return type. */
9978 type_quals
= TYPE_UNQUALIFIED
;
9980 /* Warn about some types functions can't return. */
9982 if (TREE_CODE (type
) == FUNCTION_TYPE
)
9984 error ("`%s' declared as function returning a function", name
);
9985 type
= integer_type_node
;
9987 if (TREE_CODE (type
) == ARRAY_TYPE
)
9989 error ("`%s' declared as function returning an array", name
);
9990 type
= integer_type_node
;
9993 if (inner_decl
&& TREE_CODE (inner_decl
) == SCOPE_REF
)
9994 inner_decl
= TREE_OPERAND (inner_decl
, 1);
9996 if (inner_decl
&& TREE_CODE (inner_decl
) == TEMPLATE_ID_EXPR
)
9999 /* Pick up type qualifiers which should be applied to `this'. */
10000 quals
= CALL_DECLARATOR_QUALS (declarator
);
10002 /* Pick up the exception specifications. */
10003 raises
= CALL_DECLARATOR_EXCEPTION_SPEC (declarator
);
10005 /* Say it's a definition only for the CALL_EXPR
10006 closest to the identifier. */
10009 && (TREE_CODE (inner_decl
) == IDENTIFIER_NODE
10010 || TREE_CODE (inner_decl
) == TEMPLATE_ID_EXPR
10011 || TREE_CODE (inner_decl
) == BIT_NOT_EXPR
);
10013 if (ctype
== NULL_TREE
10014 && decl_context
== FIELD
10016 && (friendp
== 0 || dname
== current_class_name
))
10017 ctype
= current_class_type
;
10019 if (ctype
&& return_type
== return_conversion
)
10020 TYPE_HAS_CONVERSION (ctype
) = 1;
10021 if (ctype
&& constructor_name (ctype
) == dname
)
10023 /* We are within a class's scope. If our declarator name
10024 is the same as the class name, and we are defining
10025 a function, then it is a constructor/destructor, and
10026 therefore returns a void type. */
10028 if (flags
== DTOR_FLAG
)
10030 /* ANSI C++ June 5 1992 WP 12.4.1. A destructor may
10031 not be declared const or volatile. A destructor
10032 may not be static. */
10034 error ("destructor cannot be static member function");
10037 cp_error ("destructors may not be `%s'",
10038 IDENTIFIER_POINTER (TREE_VALUE (quals
)));
10041 if (decl_context
== FIELD
)
10043 if (! member_function_or_else (ctype
, current_class_type
,
10044 "destructor for alien class `%s' cannot be a member"))
10045 return void_type_node
;
10048 else /* It's a constructor. */
10050 if (explicitp
== 1)
10052 /* ANSI C++ June 5 1992 WP 12.1.2. A constructor may
10053 not be declared const or volatile. A constructor may
10054 not be virtual. A constructor may not be static. */
10056 error ("constructor cannot be static member function");
10059 pedwarn ("constructors cannot be declared virtual");
10064 cp_error ("constructors may not be `%s'",
10065 IDENTIFIER_POINTER (TREE_VALUE (quals
)));
10069 RID_BIT_TYPE tmp_bits
;
10070 bcopy ((void*)&specbits
, (void*)&tmp_bits
, sizeof (RID_BIT_TYPE
));
10071 RIDBIT_RESET (RID_INLINE
, tmp_bits
);
10072 RIDBIT_RESET (RID_STATIC
, tmp_bits
);
10073 if (RIDBIT_ANY_SET (tmp_bits
))
10074 error ("return value type specifier for constructor ignored");
10076 type
= build_pointer_type (ctype
);
10077 if (decl_context
== FIELD
)
10079 if (! member_function_or_else (ctype
, current_class_type
,
10080 "constructor for alien class `%s' cannot be member"))
10081 return void_type_node
;
10082 TYPE_HAS_CONSTRUCTOR (ctype
) = 1;
10083 if (return_type
!= return_ctor
)
10087 if (decl_context
== FIELD
)
10093 error ("can't initialize friend function `%s'", name
);
10096 /* Cannot be both friend and virtual. */
10097 error ("virtual functions cannot be friends");
10098 RIDBIT_RESET (RID_FRIEND
, specbits
);
10101 if (decl_context
== NORMAL
)
10102 error ("friend declaration not in class definition");
10103 if (current_function_decl
&& funcdef_flag
)
10104 cp_error ("can't define friend function `%s' in a local class definition",
10108 /* Construct the function type and go to the next
10109 inner layer of declarator. */
10111 declarator
= TREE_OPERAND (declarator
, 0);
10113 /* FIXME: This is where default args should be fully
10116 arg_types
= grokparms (inner_parms
, funcdecl_p
? funcdef_flag
: 0);
10118 if (declarator
&& flags
== DTOR_FLAG
)
10120 /* A destructor declared in the body of a class will
10121 be represented as a BIT_NOT_EXPR. But, we just
10122 want the underlying IDENTIFIER. */
10123 if (TREE_CODE (declarator
) == BIT_NOT_EXPR
)
10124 declarator
= TREE_OPERAND (declarator
, 0);
10126 if (strict_prototype
== 0 && arg_types
== NULL_TREE
)
10127 arg_types
= void_list_node
;
10128 else if (arg_types
== NULL_TREE
10129 || arg_types
!= void_list_node
)
10131 cp_error ("destructors may not have parameters");
10132 arg_types
= void_list_node
;
10133 last_function_parms
= NULL_TREE
;
10137 /* ANSI says that `const int foo ();'
10138 does not make the function foo const. */
10139 type
= build_function_type (type
, arg_types
);
10143 for (t
= arg_types
; t
; t
= TREE_CHAIN (t
))
10144 if (TREE_PURPOSE (t
)
10145 && TREE_CODE (TREE_PURPOSE (t
)) == DEFAULT_ARG
)
10147 add_defarg_fn (type
);
10156 /* Filter out pointers-to-references and references-to-references.
10157 We can get these if a TYPE_DECL is used. */
10159 if (TREE_CODE (type
) == REFERENCE_TYPE
)
10161 error ("cannot declare %s to references",
10162 TREE_CODE (declarator
) == ADDR_EXPR
10163 ? "references" : "pointers");
10164 declarator
= TREE_OPERAND (declarator
, 0);
10168 if (TREE_CODE (type
) == OFFSET_TYPE
10169 && (TREE_CODE (TREE_TYPE (type
)) == VOID_TYPE
10170 || TREE_CODE (TREE_TYPE (type
)) == REFERENCE_TYPE
))
10172 cp_error ("cannot declare pointer to `%#T' member",
10174 type
= TREE_TYPE (type
);
10177 /* Merge any constancy or volatility into the target type
10178 for the pointer. */
10180 /* We now know that the TYPE_QUALS don't apply to the decl,
10181 but to the target of the pointer. */
10182 type_quals
= TYPE_UNQUALIFIED
;
10184 if (TREE_CODE (declarator
) == ADDR_EXPR
)
10186 if (TREE_CODE (type
) == VOID_TYPE
)
10187 error ("invalid type: `void &'");
10189 type
= build_reference_type (type
);
10191 else if (TREE_CODE (type
) == METHOD_TYPE
)
10192 type
= build_ptrmemfunc_type (build_pointer_type (type
));
10194 type
= build_pointer_type (type
);
10196 /* Process a list of type modifier keywords (such as
10197 const or volatile) that were given inside the `*' or `&'. */
10199 if (TREE_TYPE (declarator
))
10201 register tree typemodlist
;
10207 for (typemodlist
= TREE_TYPE (declarator
); typemodlist
;
10208 typemodlist
= TREE_CHAIN (typemodlist
))
10210 tree qualifier
= TREE_VALUE (typemodlist
);
10212 if (qualifier
== ridpointers
[(int) RID_CONST
])
10214 else if (qualifier
== ridpointers
[(int) RID_VOLATILE
])
10216 else if (qualifier
== ridpointers
[(int) RID_RESTRICT
])
10221 error ("invalid type modifier within pointer declarator");
10225 pedwarn ("duplicate `const'");
10227 pedwarn ("duplicate `volatile'");
10229 pedwarn ("duplicate `restrict'");
10231 type_quals
= ((constp
? TYPE_QUAL_CONST
: 0)
10232 | (restrictp
? TYPE_QUAL_RESTRICT
: 0)
10233 | (volatilep
? TYPE_QUAL_VOLATILE
: 0));
10234 if (TREE_CODE (declarator
) == ADDR_EXPR
10235 && (constp
|| volatilep
))
10238 pedwarn ("discarding `const' applied to a reference");
10240 pedwarn ("discarding `volatile' applied to a reference");
10241 type_quals
&= ~(TYPE_QUAL_CONST
| TYPE_QUAL_VOLATILE
);
10243 type
= cp_build_qualified_type (type
, type_quals
);
10245 declarator
= TREE_OPERAND (declarator
, 0);
10251 /* We have converted type names to NULL_TREE if the
10252 name was bogus, or to a _TYPE node, if not.
10254 The variable CTYPE holds the type we will ultimately
10255 resolve to. The code here just needs to build
10256 up appropriate member types. */
10257 tree sname
= TREE_OPERAND (declarator
, 1);
10260 /* Destructors can have their visibilities changed as well. */
10261 if (TREE_CODE (sname
) == BIT_NOT_EXPR
)
10262 sname
= TREE_OPERAND (sname
, 0);
10264 if (TREE_COMPLEXITY (declarator
) == 0)
10265 /* This needs to be here, in case we are called
10266 multiple times. */ ;
10267 else if (TREE_COMPLEXITY (declarator
) == -1)
10268 /* Namespace member. */
10269 pop_decl_namespace ();
10270 else if (friendp
&& (TREE_COMPLEXITY (declarator
) < 2))
10271 /* Don't fall out into global scope. Hides real bug? --eichin */ ;
10272 else if (! IS_AGGR_TYPE_CODE
10273 (TREE_CODE (TREE_OPERAND (declarator
, 0))))
10275 else if (TREE_COMPLEXITY (declarator
) == current_class_depth
)
10277 /* Resolve any TYPENAME_TYPEs from the decl-specifier-seq
10278 that refer to ctype. They couldn't be resolved earlier
10279 because we hadn't pushed into the class yet.
10280 Example: resolve 'B<T>::type' in
10281 'B<typename B<T>::type> B<T>::f () { }'. */
10282 if (current_template_parms
10283 && uses_template_parms (type
)
10284 && uses_template_parms (current_class_type
))
10286 tree args
= current_template_args ();
10287 type
= tsubst (type
, args
, /*complain=*/1, NULL_TREE
);
10290 /* This pop_nested_class corresponds to the
10291 push_nested_class used to push into class scope for
10292 parsing the argument list of a function decl, in
10294 pop_nested_class ();
10295 TREE_COMPLEXITY (declarator
) = current_class_depth
;
10298 my_friendly_abort (16);
10300 if (TREE_OPERAND (declarator
, 0) == NULL_TREE
)
10302 /* We had a reference to a global decl, or
10303 perhaps we were given a non-aggregate typedef,
10304 in which case we cleared this out, and should just
10305 keep going as though it wasn't there. */
10306 declarator
= sname
;
10309 ctype
= TREE_OPERAND (declarator
, 0);
10312 while (t
!= NULL_TREE
&& CLASS_TYPE_P (t
))
10314 if (CLASSTYPE_TEMPLATE_INFO (t
) &&
10315 !CLASSTYPE_TEMPLATE_SPECIALIZATION (t
))
10316 template_count
+= 1;
10317 t
= TYPE_MAIN_DECL (t
);
10318 if (DECL_LANG_SPECIFIC (t
))
10319 t
= DECL_CLASS_CONTEXT (t
);
10324 if (sname
== NULL_TREE
)
10327 if (TREE_CODE (sname
) == IDENTIFIER_NODE
)
10329 /* This is the `standard' use of the scoping operator:
10330 basetype :: member . */
10332 if (ctype
== current_class_type
)
10338 Is this ill-formed? */
10341 cp_pedwarn ("extra qualification `%T::' on member `%s' ignored",
10344 else if (TREE_CODE (type
) == FUNCTION_TYPE
)
10346 if (current_class_type
== NULL_TREE
10348 type
= build_cplus_method_type (ctype
, TREE_TYPE (type
),
10349 TYPE_ARG_TYPES (type
));
10352 cp_error ("cannot declare member function `%T::%s' within `%T'",
10353 ctype
, name
, current_class_type
);
10354 return void_type_node
;
10357 else if (RIDBIT_SETP (RID_TYPEDEF
, specbits
)
10358 || TYPE_SIZE (complete_type (ctype
)) != NULL_TREE
)
10360 /* Have to move this code elsewhere in this function.
10361 this code is used for i.e., typedef int A::M; M *pm;
10363 It is? How? jason 10/2/94 */
10365 if (current_class_type
)
10367 cp_error ("cannot declare member `%T::%s' within `%T'",
10368 ctype
, name
, current_class_type
);
10369 return void_type_node
;
10371 type
= build_offset_type (ctype
, type
);
10373 else if (uses_template_parms (ctype
))
10375 if (TREE_CODE (type
) == FUNCTION_TYPE
)
10377 = build_cplus_method_type (ctype
, TREE_TYPE (type
),
10378 TYPE_ARG_TYPES (type
));
10382 cp_error ("structure `%T' not yet defined", ctype
);
10383 return error_mark_node
;
10386 declarator
= sname
;
10388 else if (TREE_CODE (sname
) == SCOPE_REF
)
10389 my_friendly_abort (17);
10393 declarator
= TREE_OPERAND (declarator
, 1);
10394 if (declarator
&& TREE_CODE (declarator
) == CALL_EXPR
)
10395 /* In this case, we will deal with it later. */
10399 if (TREE_CODE (type
) == FUNCTION_TYPE
)
10400 type
= build_cplus_method_type (ctype
, TREE_TYPE (type
),
10401 TYPE_ARG_TYPES (type
));
10403 type
= build_offset_type (ctype
, type
);
10410 declarator
= TREE_OPERAND (declarator
, 0);
10415 case ENUMERAL_TYPE
:
10416 declarator
= NULL_TREE
;
10420 declarator
= NULL_TREE
;
10424 my_friendly_abort (158);
10428 /* See the comment for the TREE_LIST case, above. */
10431 if (! ignore_attrs
)
10432 decl_attributes (type
, inner_attrs
, NULL_TREE
);
10434 TREE_VALUE (attrlist
) = chainon (inner_attrs
, TREE_VALUE (attrlist
));
10436 attrlist
= build_decl_list (NULL_TREE
, inner_attrs
);
10439 /* Now TYPE has the actual type. */
10441 if (explicitp
== 1 || (explicitp
&& friendp
))
10443 /* [dcl.fct.spec] The explicit specifier shall only be used in
10444 declarations of constructors within a class definition. */
10445 error ("only declarations of constructors can be `explicit'");
10449 if (RIDBIT_SETP (RID_MUTABLE
, specbits
))
10451 if (current_class_name
== NULL_TREE
|| decl_context
== PARM
|| friendp
)
10453 error ("non-member `%s' cannot be declared `mutable'", name
);
10454 RIDBIT_RESET (RID_MUTABLE
, specbits
);
10456 else if (decl_context
== TYPENAME
|| RIDBIT_SETP (RID_TYPEDEF
, specbits
))
10458 error ("non-object member `%s' cannot be declared `mutable'", name
);
10459 RIDBIT_RESET (RID_MUTABLE
, specbits
);
10461 else if (TREE_CODE (type
) == FUNCTION_TYPE
10462 || TREE_CODE (type
) == METHOD_TYPE
)
10464 error ("function `%s' cannot be declared `mutable'", name
);
10465 RIDBIT_RESET (RID_MUTABLE
, specbits
);
10469 error ("static `%s' cannot be declared `mutable'", name
);
10470 RIDBIT_RESET (RID_MUTABLE
, specbits
);
10472 else if (type_quals
& TYPE_QUAL_CONST
)
10474 error ("const `%s' cannot be declared `mutable'", name
);
10475 RIDBIT_RESET (RID_MUTABLE
, specbits
);
10479 if (declarator
== NULL_TREE
10480 || TREE_CODE (declarator
) == IDENTIFIER_NODE
10481 || (TREE_CODE (declarator
) == TEMPLATE_ID_EXPR
10482 && (TREE_CODE (type
) == FUNCTION_TYPE
10483 || TREE_CODE (type
) == METHOD_TYPE
)))
10485 else if (TREE_CODE (declarator
) == TEMPLATE_ID_EXPR
)
10487 cp_error ("template-id `%D' used as a declarator", declarator
);
10488 declarator
= dname
;
10491 /* Unexpected declarator format. */
10492 my_friendly_abort (990210);
10494 /* If this is declaring a typedef name, return a TYPE_DECL. */
10496 if (RIDBIT_SETP (RID_TYPEDEF
, specbits
) && decl_context
!= TYPENAME
)
10500 /* Note that the grammar rejects storage classes
10501 in typenames, fields or parameters. */
10502 if (current_lang_name
== lang_name_java
)
10503 TYPE_FOR_JAVA (type
) = 1;
10505 if (decl_context
== FIELD
)
10507 if (declarator
== constructor_name (current_class_type
))
10508 cp_pedwarn ("ANSI C++ forbids nested type `%D' with same name as enclosing class",
10510 decl
= build_lang_decl (TYPE_DECL
, declarator
, type
);
10514 /* Make sure this typedef lives as long as its type,
10515 since it might be used as a template parameter. */
10516 if (type
!= error_mark_node
)
10517 push_obstacks (TYPE_OBSTACK (type
), TYPE_OBSTACK (type
));
10518 if (processing_template_decl
)
10519 decl
= build_lang_decl (TYPE_DECL
, declarator
, type
);
10521 decl
= build_decl (TYPE_DECL
, declarator
, type
);
10522 if (type
!= error_mark_node
)
10526 /* If the user declares "typedef struct {...} foo" then the
10527 struct will have an anonymous name. Fill that name in now.
10528 Nothing can refer to it, so nothing needs know about the name
10530 if (type
!= error_mark_node
10531 && TYPE_NAME (type
)
10532 && TREE_CODE (TYPE_NAME (type
)) == TYPE_DECL
10533 && ANON_AGGRNAME_P (TYPE_IDENTIFIER (type
))
10534 && CP_TYPE_QUALS (type
) == TYPE_UNQUALIFIED
)
10536 tree oldname
= TYPE_NAME (type
);
10539 /* Replace the anonymous name with the real name everywhere. */
10540 lookup_tag_reverse (type
, declarator
);
10541 for (t
= TYPE_MAIN_VARIANT (type
); t
; t
= TYPE_NEXT_VARIANT (t
))
10542 if (TYPE_NAME (t
) == oldname
)
10543 TYPE_NAME (t
) = decl
;
10545 if (TYPE_LANG_SPECIFIC (type
))
10546 TYPE_WAS_ANONYMOUS (type
) = 1;
10548 /* If this is a typedef within a template class, the nested
10549 type is a (non-primary) template. The name for the
10550 template needs updating as well. */
10551 if (TYPE_LANG_SPECIFIC (type
) && CLASSTYPE_TEMPLATE_INFO (type
))
10552 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type
))
10553 = TYPE_IDENTIFIER (type
);
10555 /* XXX Temporarily set the scope.
10556 When returning, start_decl expects it as NULL_TREE,
10557 and will then then set it using pushdecl. */
10558 my_friendly_assert (DECL_CONTEXT (decl
) == NULL_TREE
, 980404);
10559 if (current_class_type
)
10560 DECL_CONTEXT (decl
) = current_class_type
;
10562 DECL_CONTEXT (decl
) = FROB_CONTEXT (current_namespace
);
10564 DECL_ASSEMBLER_NAME (decl
) = DECL_NAME (decl
);
10565 DECL_ASSEMBLER_NAME (decl
)
10566 = get_identifier (build_overload_name (type
, 1, 1));
10567 DECL_CONTEXT (decl
) = NULL_TREE
;
10569 /* FIXME remangle member functions; member functions of a
10570 type with external linkage have external linkage. */
10573 if (TREE_CODE (type
) == OFFSET_TYPE
|| TREE_CODE (type
) == METHOD_TYPE
)
10575 cp_error_at ("typedef name may not be class-qualified", decl
);
10580 if (ctype
== NULL_TREE
)
10582 if (TREE_CODE (type
) != METHOD_TYPE
)
10583 cp_error_at ("invalid type qualifier for non-method type", decl
);
10585 ctype
= TYPE_METHOD_BASETYPE (type
);
10587 if (ctype
!= NULL_TREE
)
10588 grok_method_quals (ctype
, decl
, quals
);
10591 if (RIDBIT_SETP (RID_SIGNED
, specbits
)
10592 || (typedef_decl
&& C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl
)))
10593 C_TYPEDEF_EXPLICITLY_SIGNED (decl
) = 1;
10595 bad_specifiers (decl
, "type", virtualp
, quals
!= NULL_TREE
,
10596 inlinep
, friendp
, raises
!= NULL_TREE
);
10599 error ("typedef declaration includes an initializer");
10604 /* Detect the case of an array type of unspecified size
10605 which came, as such, direct from a typedef name.
10606 We must copy the type, so that each identifier gets
10607 a distinct type, so that each identifier's size can be
10608 controlled separately by its own initializer. */
10610 if (type
== typedef_type
&& TREE_CODE (type
) == ARRAY_TYPE
10611 && TYPE_DOMAIN (type
) == NULL_TREE
)
10613 type
= build_cplus_array_type (TREE_TYPE (type
), TYPE_DOMAIN (type
));
10616 /* If this is a type name (such as, in a cast or sizeof),
10617 compute the type and return it now. */
10619 if (decl_context
== TYPENAME
)
10621 /* Note that the grammar rejects storage classes
10622 in typenames, fields or parameters. */
10623 if (type_quals
!= TYPE_UNQUALIFIED
)
10624 type_quals
= TYPE_UNQUALIFIED
;
10626 /* Special case: "friend class foo" looks like a TYPENAME context. */
10629 if (type_quals
!= TYPE_UNQUALIFIED
)
10631 cp_error ("type qualifiers specified for friend class declaration");
10632 type_quals
= TYPE_UNQUALIFIED
;
10636 cp_error ("`inline' specified for friend class declaration");
10640 /* Only try to do this stuff if we didn't already give up. */
10641 if (type
!= integer_type_node
)
10643 /* A friendly class? */
10644 if (current_class_type
)
10645 make_friend_class (current_class_type
, TYPE_MAIN_VARIANT (type
));
10647 error ("trying to make class `%s' a friend of global scope",
10648 TYPE_NAME_STRING (type
));
10649 type
= void_type_node
;
10654 tree dummy
= build_decl (TYPE_DECL
, declarator
, type
);
10655 if (ctype
== NULL_TREE
)
10657 my_friendly_assert (TREE_CODE (type
) == METHOD_TYPE
, 159);
10658 ctype
= TYPE_METHOD_BASETYPE (type
);
10660 grok_method_quals (ctype
, dummy
, quals
);
10661 type
= TREE_TYPE (dummy
);
10666 else if (declarator
== NULL_TREE
&& decl_context
!= PARM
10667 && decl_context
!= CATCHPARM
10668 && TREE_CODE (type
) != UNION_TYPE
10671 cp_error ("abstract declarator `%T' used as declaration", type
);
10672 declarator
= make_anon_name ();
10675 /* `void' at top level (not within pointer)
10676 is allowed only in typedefs or type names.
10677 We don't complain about parms either, but that is because
10678 a better error message can be made later. */
10680 if (TREE_CODE (type
) == VOID_TYPE
&& decl_context
!= PARM
)
10683 error ("unnamed variable or field declared void");
10684 else if (TREE_CODE (declarator
) == IDENTIFIER_NODE
)
10686 if (IDENTIFIER_OPNAME_P (declarator
))
10687 my_friendly_abort (356);
10689 error ("variable or field `%s' declared void", name
);
10692 error ("variable or field declared void");
10693 type
= integer_type_node
;
10696 /* Now create the decl, which may be a VAR_DECL, a PARM_DECL
10697 or a FUNCTION_DECL, depending on DECL_CONTEXT and TYPE. */
10699 if (decl_context
== PARM
|| decl_context
== CATCHPARM
)
10701 if (ctype
|| in_namespace
)
10702 error ("cannot use `::' in parameter declaration");
10704 /* A parameter declared as an array of T is really a pointer to T.
10705 One declared as a function is really a pointer to a function.
10706 One declared as a member is really a pointer to member. */
10708 if (TREE_CODE (type
) == ARRAY_TYPE
)
10710 /* Transfer const-ness of array into that of type pointed to. */
10711 type
= build_pointer_type (TREE_TYPE (type
));
10712 type_quals
= TYPE_UNQUALIFIED
;
10714 else if (TREE_CODE (type
) == FUNCTION_TYPE
)
10715 type
= build_pointer_type (type
);
10716 else if (TREE_CODE (type
) == OFFSET_TYPE
)
10717 type
= build_pointer_type (type
);
10718 else if (TREE_CODE (type
) == VOID_TYPE
&& declarator
)
10720 error ("declaration of `%s' as void", name
);
10726 register tree decl
;
10728 if (decl_context
== PARM
)
10730 decl
= build_decl (PARM_DECL
, declarator
, type
);
10732 bad_specifiers (decl
, "parameter", virtualp
, quals
!= NULL_TREE
,
10733 inlinep
, friendp
, raises
!= NULL_TREE
);
10735 /* Compute the type actually passed in the parmlist,
10736 for the case where there is no prototype.
10737 (For example, shorts and chars are passed as ints.)
10738 When there is a prototype, this is overridden later. */
10740 DECL_ARG_TYPE (decl
) = type_promotes_to (type
);
10742 else if (decl_context
== FIELD
)
10744 if (type
== error_mark_node
)
10746 /* Happens when declaring arrays of sizes which
10747 are error_mark_node, for example. */
10750 else if (in_namespace
&& !friendp
)
10752 /* Something like struct S { int N::j; }; */
10753 cp_error ("invalid use of `::'");
10756 else if (TREE_CODE (type
) == FUNCTION_TYPE
)
10759 tree function_context
;
10761 /* We catch the others as conflicts with the builtin
10763 if (friendp
&& declarator
== ridpointers
[(int) RID_SIGNED
])
10765 cp_error ("function `%D' cannot be declared friend",
10772 if (ctype
== NULL_TREE
)
10773 ctype
= current_class_type
;
10775 if (ctype
== NULL_TREE
)
10777 cp_error ("can't make `%D' into a method -- not in a class",
10779 return void_type_node
;
10782 /* ``A union may [ ... ] not [ have ] virtual functions.''
10784 if (virtualp
&& TREE_CODE (ctype
) == UNION_TYPE
)
10786 cp_error ("function `%D' declared virtual inside a union",
10788 return void_type_node
;
10791 if (declarator
== ansi_opname
[(int) NEW_EXPR
]
10792 || declarator
== ansi_opname
[(int) VEC_NEW_EXPR
]
10793 || declarator
== ansi_opname
[(int) DELETE_EXPR
]
10794 || declarator
== ansi_opname
[(int) VEC_DELETE_EXPR
])
10798 cp_error ("`%D' cannot be declared virtual, since it is always static",
10803 else if (staticp
< 2)
10804 type
= build_cplus_method_type (ctype
, TREE_TYPE (type
),
10805 TYPE_ARG_TYPES (type
));
10808 /* Tell grokfndecl if it needs to set TREE_PUBLIC on the node. */
10809 function_context
= (ctype
!= NULL_TREE
) ?
10810 hack_decl_function_context (TYPE_MAIN_DECL (ctype
)) : NULL_TREE
;
10811 publicp
= (! friendp
|| ! staticp
)
10812 && function_context
== NULL_TREE
;
10813 decl
= grokfndecl (ctype
, type
,
10814 TREE_CODE (declarator
) != TEMPLATE_ID_EXPR
10815 ? declarator
: dname
,
10817 virtualp
, flags
, quals
, raises
,
10818 friendp
? -1 : 0, friendp
, publicp
, inlinep
,
10819 funcdef_flag
, template_count
, in_namespace
);
10820 if (decl
== NULL_TREE
)
10823 /* This clobbers the attrs stored in `decl' from `attrlist'. */
10824 /* The decl and setting of decl_machine_attr is also turned off. */
10825 decl
= build_decl_attribute_variant (decl
, decl_machine_attr
);
10828 /* [class.conv.ctor]
10830 A constructor declared without the function-specifier
10831 explicit that can be called with a single parameter
10832 specifies a conversion from the type of its first
10833 parameter to the type of its class. Such a constructor
10834 is called a converting constructor. */
10835 if (explicitp
== 2)
10836 DECL_NONCONVERTING_P (decl
) = 1;
10837 else if (DECL_CONSTRUCTOR_P (decl
))
10839 /* The constructor can be called with exactly one
10840 parameter if there is at least one parameter, and
10841 any subsequent parameters have default arguments.
10842 We don't look at the first parameter, which is
10843 really just the `this' parameter for the new
10846 TREE_CHAIN (TYPE_ARG_TYPES (TREE_TYPE (decl
)));
10848 /* Skip the `in_chrg' argument too, if present. */
10849 if (TYPE_USES_VIRTUAL_BASECLASSES (DECL_CONTEXT (decl
)))
10850 arg_types
= TREE_CHAIN (arg_types
);
10852 if (arg_types
== void_list_node
10854 && TREE_CHAIN (arg_types
)
10855 && TREE_CHAIN (arg_types
) != void_list_node
10856 && !TREE_PURPOSE (TREE_CHAIN (arg_types
))))
10857 DECL_NONCONVERTING_P (decl
) = 1;
10860 else if (TREE_CODE (type
) == METHOD_TYPE
)
10862 /* We only get here for friend declarations of
10863 members of other classes. */
10864 /* All method decls are public, so tell grokfndecl to set
10865 TREE_PUBLIC, also. */
10866 decl
= grokfndecl (ctype
, type
, declarator
, declarator
,
10867 virtualp
, flags
, quals
, raises
,
10868 friendp
? -1 : 0, friendp
, 1, 0, funcdef_flag
,
10869 template_count
, in_namespace
);
10870 if (decl
== NULL_TREE
)
10873 else if (!staticp
&& ! processing_template_decl
10874 && TYPE_SIZE (complete_type (type
)) == NULL_TREE
10875 && (TREE_CODE (type
) != ARRAY_TYPE
|| initialized
== 0))
10878 cp_error ("field `%D' has incomplete type", declarator
);
10880 cp_error ("name `%T' has incomplete type", type
);
10882 /* If we're instantiating a template, tell them which
10883 instantiation made the field's type be incomplete. */
10884 if (current_class_type
10885 && TYPE_NAME (current_class_type
)
10886 && IDENTIFIER_TEMPLATE (TYPE_IDENTIFIER (current_class_type
))
10887 && declspecs
&& TREE_VALUE (declspecs
)
10888 && TREE_TYPE (TREE_VALUE (declspecs
)) == type
)
10889 cp_error (" in instantiation of template `%T'",
10890 current_class_type
);
10892 type
= error_mark_node
;
10899 error ("`%s' is neither function nor method; cannot be declared friend",
10900 IDENTIFIER_POINTER (declarator
));
10908 /* Friends are treated specially. */
10909 if (ctype
== current_class_type
)
10910 warning ("member functions are implicitly friends of their class");
10913 tree t
= NULL_TREE
;
10914 if (decl
&& DECL_NAME (decl
))
10916 if (template_class_depth (current_class_type
) == 0)
10919 = check_explicit_specialization
10921 template_count
, 2 * (funcdef_flag
!= 0) + 4);
10922 if (decl
== error_mark_node
)
10923 return error_mark_node
;
10926 t
= do_friend (ctype
, declarator
, decl
,
10927 last_function_parms
, attrlist
, flags
, quals
,
10930 if (t
&& funcdef_flag
)
10933 return void_type_node
;
10937 /* Structure field. It may not be a function, except for C++ */
10939 if (decl
== NULL_TREE
)
10945 /* An attempt is being made to initialize a non-static
10946 member. But, from [class.mem]:
10948 4 A member-declarator can contain a
10949 constant-initializer only if it declares a static
10950 member (_class.static_) of integral or enumeration
10951 type, see _class.static.data_.
10953 This used to be relatively common practice, but
10954 the rest of the compiler does not correctly
10955 handle the initialization unless the member is
10956 static so we make it static below. */
10957 cp_pedwarn ("ANSI C++ forbids initialization of member `%D'",
10959 cp_pedwarn ("making `%D' static", declarator
);
10963 if (uses_template_parms (type
))
10964 /* We'll check at instantiation time. */
10966 else if (check_static_variable_definition (declarator
,
10968 /* If we just return the declaration, crashes
10969 will sometimes occur. We therefore return
10970 void_type_node, as if this was a friend
10971 declaration, to cause callers to completely
10972 ignore this declaration. */
10973 return void_type_node
;
10976 /* 9.2p13 [class.mem] */
10977 if (declarator
== constructor_name (current_class_type
)
10978 /* Divergence from the standard: In extern "C", we
10979 allow non-static data members here, because C does
10980 and /usr/include/netinet/in.h uses that. */
10981 && (staticp
|| ! in_system_header
))
10982 cp_pedwarn ("ANSI C++ forbids data member `%D' with same name as enclosing class",
10987 /* C++ allows static class members. All other work
10988 for this is done by grokfield. */
10989 decl
= build_lang_decl (VAR_DECL
, declarator
, type
);
10990 TREE_STATIC (decl
) = 1;
10991 /* In class context, 'static' means public access. */
10992 TREE_PUBLIC (decl
) = DECL_EXTERNAL (decl
) = 1;
10996 decl
= build_lang_decl (FIELD_DECL
, declarator
, type
);
10997 if (RIDBIT_SETP (RID_MUTABLE
, specbits
))
10999 DECL_MUTABLE_P (decl
) = 1;
11000 RIDBIT_RESET (RID_MUTABLE
, specbits
);
11004 bad_specifiers (decl
, "field", virtualp
, quals
!= NULL_TREE
,
11005 inlinep
, friendp
, raises
!= NULL_TREE
);
11008 else if (TREE_CODE (type
) == FUNCTION_TYPE
|| TREE_CODE (type
) == METHOD_TYPE
)
11010 tree original_name
;
11016 if (TREE_CODE (declarator
) == TEMPLATE_ID_EXPR
)
11017 original_name
= dname
;
11019 original_name
= declarator
;
11021 if (RIDBIT_SETP (RID_AUTO
, specbits
))
11022 error ("storage class `auto' invalid for function `%s'", name
);
11023 else if (RIDBIT_SETP (RID_REGISTER
, specbits
))
11024 error ("storage class `register' invalid for function `%s'", name
);
11026 /* Function declaration not at top level.
11027 Storage classes other than `extern' are not allowed
11028 and `extern' makes no difference. */
11029 if (! toplevel_bindings_p ()
11030 && (RIDBIT_SETP (RID_STATIC
, specbits
)
11031 || RIDBIT_SETP (RID_INLINE
, specbits
))
11034 if (RIDBIT_SETP (RID_STATIC
, specbits
))
11035 pedwarn ("storage class `static' invalid for function `%s' declared out of global scope", name
);
11037 pedwarn ("storage class `inline' invalid for function `%s' declared out of global scope", name
);
11040 if (ctype
== NULL_TREE
)
11044 error ("virtual non-class function `%s'", name
);
11048 else if (TREE_CODE (type
) == FUNCTION_TYPE
&& staticp
< 2)
11049 type
= build_cplus_method_type (ctype
, TREE_TYPE (type
),
11050 TYPE_ARG_TYPES (type
));
11052 /* Record presence of `static'. */
11053 publicp
= (ctype
!= NULL_TREE
11054 || RIDBIT_SETP (RID_EXTERN
, specbits
)
11055 || !RIDBIT_SETP (RID_STATIC
, specbits
));
11057 decl
= grokfndecl (ctype
, type
, original_name
, declarator
,
11058 virtualp
, flags
, quals
, raises
,
11060 publicp
, inlinep
, funcdef_flag
,
11061 template_count
, in_namespace
);
11062 if (decl
== NULL_TREE
)
11067 int illegal_static
= 0;
11069 /* Don't allow a static member function in a class, and forbid
11070 declaring main to be static. */
11071 if (TREE_CODE (type
) == METHOD_TYPE
)
11073 cp_pedwarn ("cannot declare member function `%D' to have static linkage", decl
);
11074 illegal_static
= 1;
11076 else if (current_function_decl
)
11078 /* FIXME need arm citation */
11079 error ("cannot declare static function inside another function");
11080 illegal_static
= 1;
11083 if (illegal_static
)
11086 RIDBIT_RESET (RID_STATIC
, specbits
);
11092 /* It's a variable. */
11094 /* An uninitialized decl with `extern' is a reference. */
11095 decl
= grokvardecl (type
, declarator
, &specbits
,
11097 (type_quals
& TYPE_QUAL_CONST
) != 0,
11099 bad_specifiers (decl
, "variable", virtualp
, quals
!= NULL_TREE
,
11100 inlinep
, friendp
, raises
!= NULL_TREE
);
11104 DECL_CONTEXT (decl
) = ctype
;
11107 cp_pedwarn ("static member `%D' re-declared as static", decl
);
11109 RIDBIT_RESET (RID_STATIC
, specbits
);
11111 if (RIDBIT_SETP (RID_REGISTER
, specbits
) && TREE_STATIC (decl
))
11113 cp_error ("static member `%D' declared `register'", decl
);
11114 RIDBIT_RESET (RID_REGISTER
, specbits
);
11116 if (RIDBIT_SETP (RID_EXTERN
, specbits
) && pedantic
)
11118 cp_pedwarn ("cannot explicitly declare member `%#D' to have extern linkage",
11120 RIDBIT_RESET (RID_EXTERN
, specbits
);
11125 my_friendly_assert (!RIDBIT_SETP (RID_MUTABLE
, specbits
), 19990927);
11127 /* Record `register' declaration for warnings on &
11128 and in case doing stupid register allocation. */
11130 if (RIDBIT_SETP (RID_REGISTER
, specbits
))
11131 DECL_REGISTER (decl
) = 1;
11133 if (RIDBIT_SETP (RID_EXTERN
, specbits
))
11134 DECL_THIS_EXTERN (decl
) = 1;
11136 if (RIDBIT_SETP (RID_STATIC
, specbits
))
11137 DECL_THIS_STATIC (decl
) = 1;
11139 /* Record constancy and volatility. There's no need to do this
11140 when processing a template; we'll do this for the instantiated
11141 declaration based on the type of DECL. */
11142 if (!processing_template_decl
)
11143 c_apply_type_quals_to_decl (type_quals
, decl
);
11149 /* Tell if a parmlist/exprlist looks like an exprlist or a parmlist.
11150 An empty exprlist is a parmlist. An exprlist which
11151 contains only identifiers at the global level
11152 is a parmlist. Otherwise, it is an exprlist. */
11155 parmlist_is_exprlist (exprs
)
11158 if (exprs
== NULL_TREE
|| TREE_PARMLIST (exprs
))
11161 if (toplevel_bindings_p ())
11163 /* At the global level, if these are all identifiers,
11164 then it is a parmlist. */
11167 if (TREE_CODE (TREE_VALUE (exprs
)) != IDENTIFIER_NODE
)
11169 exprs
= TREE_CHAIN (exprs
);
11176 /* Subroutine of start_function. Ensure that each of the parameter
11177 types (as listed in PARMS) is complete, as is required for a
11178 function definition. */
11181 require_complete_types_for_parms (parms
)
11186 tree type
= TREE_TYPE (parms
);
11187 if (TYPE_SIZE (complete_type (type
)) == NULL_TREE
)
11189 if (DECL_NAME (parms
))
11190 error ("parameter `%s' has incomplete type",
11191 IDENTIFIER_POINTER (DECL_NAME (parms
)));
11193 error ("parameter has incomplete type");
11194 TREE_TYPE (parms
) = error_mark_node
;
11197 layout_decl (parms
, 0);
11199 parms
= TREE_CHAIN (parms
);
11203 /* Returns *TP if *TP is a local variable (or parameter). Returns
11204 NULL_TREE otherwise. */
11207 local_variable_p (tp
)
11212 if ((TREE_CODE (t
) == VAR_DECL
11213 /* A VAR_DECL with a context that is a _TYPE is a static data
11215 && !TYPE_P (CP_DECL_CONTEXT (t
))
11216 /* Any other non-local variable must be at namespace scope. */
11217 && TREE_CODE (CP_DECL_CONTEXT (t
)) != NAMESPACE_DECL
)
11218 || (TREE_CODE (t
) == PARM_DECL
))
11224 /* Check that ARG, which is a default-argument expression for a
11225 parameter DECL, is legal. Returns ARG, or ERROR_MARK_NODE, if
11226 something goes wrong. DECL may also be a _TYPE node, rather than a
11227 DECL, if there is no DECL available. */
11230 check_default_argument (decl
, arg
)
11237 if (TREE_CODE (arg
) == DEFAULT_ARG
)
11238 /* We get a DEFAULT_ARG when looking at an in-class declaration
11239 with a default argument. Ignore the argument for now; we'll
11240 deal with it after the class is complete. */
11243 if (processing_template_decl
|| uses_template_parms (arg
))
11244 /* We don't do anything checking until instantiation-time. Note
11245 that there may be uninstantiated arguments even for an
11246 instantiated function, since default arguments are not
11247 instantiated until they are needed. */
11256 decl_type
= TREE_TYPE (decl
);
11258 if (arg
== error_mark_node
11259 || decl
== error_mark_node
11260 || TREE_TYPE (arg
) == error_mark_node
11261 || decl_type
== error_mark_node
)
11262 /* Something already went wrong. There's no need to check
11264 return error_mark_node
;
11266 /* [dcl.fct.default]
11268 A default argument expression is implicitly converted to the
11270 if (!TREE_TYPE (arg
)
11271 || !can_convert_arg (decl_type
, TREE_TYPE (arg
), arg
))
11274 cp_error ("default argument for `%#D' has type `%T'",
11275 decl
, TREE_TYPE (arg
));
11277 cp_error ("default argument for parameter of type `%T' has type `%T'",
11278 decl_type
, TREE_TYPE (arg
));
11280 return error_mark_node
;
11283 /* [dcl.fct.default]
11285 Local variables shall not be used in default argument
11288 The keyword `this' shall not be used in a default argument of a
11289 member function. */
11290 var
= search_tree (&arg
, local_variable_p
);
11293 cp_error ("default argument `%E' uses local variable `%D'",
11295 return error_mark_node
;
11302 /* Decode the list of parameter types for a function type.
11303 Given the list of things declared inside the parens,
11304 return a list of types.
11306 The list we receive can have three kinds of elements:
11307 an IDENTIFIER_NODE for names given without types,
11308 a TREE_LIST node for arguments given as typespecs or names with typespecs,
11309 or void_type_node, to mark the end of an argument list
11310 when additional arguments are not permitted (... was not used).
11312 FUNCDEF_FLAG is nonzero for a function definition, 0 for
11313 a mere declaration. A nonempty identifier-list gets an error message
11314 when FUNCDEF_FLAG is zero.
11315 If FUNCDEF_FLAG is 1, then parameter types must be complete.
11316 If FUNCDEF_FLAG is -1, then parameter types may be incomplete.
11318 If all elements of the input list contain types,
11319 we return a list of the types.
11320 If all elements contain no type (except perhaps a void_type_node
11321 at the end), we return a null list.
11322 If some have types and some do not, it is an error, and we
11323 return a null list.
11325 Also set last_function_parms to either
11326 a list of names (IDENTIFIER_NODEs) or a chain of PARM_DECLs.
11327 A list of names is converted to a chain of PARM_DECLs
11328 by store_parm_decls so that ultimately it is always a chain of decls.
11330 Note that in C++, parameters can take default values. These default
11331 values are in the TREE_PURPOSE field of the TREE_LIST. It is
11332 an error to specify default values which are followed by parameters
11333 that have no default values, or an ELLIPSES. For simplicities sake,
11334 only parameters which are specified with their types can take on
11338 grokparms (first_parm
, funcdef_flag
)
11342 tree result
= NULL_TREE
;
11343 tree decls
= NULL_TREE
;
11345 if (first_parm
!= NULL_TREE
11346 && TREE_CODE (TREE_VALUE (first_parm
)) == IDENTIFIER_NODE
)
11348 if (! funcdef_flag
)
11349 pedwarn ("parameter names (without types) in function declaration");
11350 last_function_parms
= first_parm
;
11353 else if (first_parm
!= NULL_TREE
11354 && TREE_CODE (TREE_VALUE (first_parm
)) != TREE_LIST
11355 && TREE_CODE (TREE_VALUE (first_parm
)) != VOID_TYPE
)
11356 my_friendly_abort (145);
11359 /* Types were specified. This is a list of declarators
11360 each represented as a TREE_LIST node. */
11361 register tree parm
, chain
;
11362 int any_init
= 0, any_error
= 0;
11364 if (first_parm
!= NULL_TREE
)
11366 tree last_result
= NULL_TREE
;
11367 tree last_decl
= NULL_TREE
;
11369 for (parm
= first_parm
; parm
!= NULL_TREE
; parm
= chain
)
11371 tree type
= NULL_TREE
, list_node
= parm
;
11372 register tree decl
= TREE_VALUE (parm
);
11373 tree init
= TREE_PURPOSE (parm
);
11375 chain
= TREE_CHAIN (parm
);
11376 /* @@ weak defense against parse errors. */
11377 if (TREE_CODE (decl
) != VOID_TYPE
11378 && TREE_CODE (decl
) != TREE_LIST
)
11380 /* Give various messages as the need arises. */
11381 if (TREE_CODE (decl
) == STRING_CST
)
11382 cp_error ("invalid string constant `%E'", decl
);
11383 else if (TREE_CODE (decl
) == INTEGER_CST
)
11384 error ("invalid integer constant in parameter list, did you forget to give parameter name?");
11388 if (TREE_CODE (decl
) != VOID_TYPE
)
11390 decl
= grokdeclarator (TREE_VALUE (decl
),
11391 TREE_PURPOSE (decl
),
11392 PARM
, init
!= NULL_TREE
,
11394 if (! decl
|| TREE_TYPE (decl
) == error_mark_node
)
11397 /* Top-level qualifiers on the parameters are
11398 ignored for function types. */
11399 type
= TYPE_MAIN_VARIANT (TREE_TYPE (decl
));
11401 if (TREE_CODE (type
) == VOID_TYPE
)
11402 decl
= void_type_node
;
11403 else if (TREE_CODE (type
) == METHOD_TYPE
)
11405 if (DECL_NAME (decl
))
11406 /* Cannot use the decl here because
11407 we don't have DECL_CONTEXT set up yet. */
11408 cp_error ("parameter `%D' invalidly declared method type",
11411 error ("parameter invalidly declared method type");
11412 type
= build_pointer_type (type
);
11413 TREE_TYPE (decl
) = type
;
11415 else if (TREE_CODE (type
) == OFFSET_TYPE
)
11417 if (DECL_NAME (decl
))
11418 cp_error ("parameter `%D' invalidly declared offset type",
11421 error ("parameter invalidly declared offset type");
11422 type
= build_pointer_type (type
);
11423 TREE_TYPE (decl
) = type
;
11425 else if (abstract_virtuals_error (decl
, type
))
11426 any_error
= 1; /* Seems like a good idea. */
11427 else if (POINTER_TYPE_P (type
))
11430 while (POINTER_TYPE_P (t
)
11431 || (TREE_CODE (t
) == ARRAY_TYPE
11432 && TYPE_DOMAIN (t
) != NULL_TREE
))
11434 if (TREE_CODE (t
) == ARRAY_TYPE
)
11435 cp_error ("parameter type `%T' includes %s to array of unknown bound",
11437 TYPE_PTR_P (type
) ? "pointer" : "reference");
11441 if (TREE_CODE (decl
) == VOID_TYPE
)
11443 if (result
== NULL_TREE
)
11445 result
= void_list_node
;
11446 last_result
= result
;
11450 TREE_CHAIN (last_result
) = void_list_node
;
11451 last_result
= void_list_node
;
11454 && (chain
!= void_list_node
|| TREE_CHAIN (chain
)))
11455 error ("`void' in parameter list must be entire list");
11459 /* Since there is a prototype, args are passed in their own types. */
11460 DECL_ARG_TYPE (decl
) = TREE_TYPE (decl
);
11461 if (PROMOTE_PROTOTYPES
11462 && (TREE_CODE (type
) == INTEGER_TYPE
11463 || TREE_CODE (type
) == ENUMERAL_TYPE
)
11464 && TYPE_PRECISION (type
) < TYPE_PRECISION (integer_type_node
))
11465 DECL_ARG_TYPE (decl
) = integer_type_node
;
11466 if (!any_error
&& init
)
11469 init
= check_default_argument (decl
, init
);
11474 if (decls
== NULL_TREE
)
11481 TREE_CHAIN (last_decl
) = decl
;
11484 list_node
= tree_cons (init
, type
, NULL_TREE
);
11485 if (result
== NULL_TREE
)
11487 result
= list_node
;
11488 last_result
= result
;
11492 TREE_CHAIN (last_result
) = list_node
;
11493 last_result
= list_node
;
11497 TREE_CHAIN (last_result
) = NULL_TREE
;
11498 /* If there are no parameters, and the function does not end
11499 with `...', then last_decl will be NULL_TREE. */
11500 if (last_decl
!= NULL_TREE
)
11501 TREE_CHAIN (last_decl
) = NULL_TREE
;
11505 last_function_parms
= decls
;
11510 /* Called from the parser to update an element of TYPE_ARG_TYPES for some
11511 FUNCTION_TYPE with the newly parsed version of its default argument, which
11512 was previously digested as text. See snarf_defarg et al in lex.c. */
11515 replace_defarg (arg
, init
)
11518 if (! processing_template_decl
11519 && ! can_convert_arg (TREE_VALUE (arg
), TREE_TYPE (init
), init
))
11520 cp_pedwarn ("invalid type `%T' for default argument to `%T'",
11521 TREE_TYPE (init
), TREE_VALUE (arg
));
11522 TREE_PURPOSE (arg
) = init
;
11529 tree t
= FUNCTION_ARG_CHAIN (d
);
11530 if (DECL_CONSTRUCTOR_P (d
)
11531 && TYPE_USES_VIRTUAL_BASECLASSES (DECL_CONTEXT (d
)))
11532 t
= TREE_CHAIN (t
);
11533 if (t
&& TREE_CODE (TREE_VALUE (t
)) == REFERENCE_TYPE
11534 && (TYPE_MAIN_VARIANT (TREE_TYPE (TREE_VALUE (t
)))
11535 == DECL_CLASS_CONTEXT (d
))
11536 && (TREE_CHAIN (t
) == NULL_TREE
11537 || TREE_CHAIN (t
) == void_list_node
11538 || TREE_PURPOSE (TREE_CHAIN (t
))))
11543 /* These memoizing functions keep track of special properties which
11544 a class may have. `grok_ctor_properties' notices whether a class
11545 has a constructor of the form X(X&), and also complains
11546 if the class has a constructor of the form X(X).
11547 `grok_op_properties' takes notice of the various forms of
11548 operator= which are defined, as well as what sorts of type conversion
11549 may apply. Both functions take a FUNCTION_DECL as an argument. */
11552 grok_ctor_properties (ctype
, decl
)
11555 tree parmtypes
= FUNCTION_ARG_CHAIN (decl
);
11556 tree parmtype
= parmtypes
? TREE_VALUE (parmtypes
) : void_type_node
;
11558 /* When a type has virtual baseclasses, a magical first int argument is
11559 added to any ctor so we can tell if the class has been initialized
11560 yet. This could screw things up in this function, so we deliberately
11561 ignore the leading int if we're in that situation. */
11562 if (TYPE_USES_VIRTUAL_BASECLASSES (ctype
))
11564 my_friendly_assert (parmtypes
11565 && TREE_VALUE (parmtypes
) == integer_type_node
,
11567 parmtypes
= TREE_CHAIN (parmtypes
);
11568 parmtype
= TREE_VALUE (parmtypes
);
11573 A non-template constructor for class X is a copy constructor if
11574 its first parameter is of type X&, const X&, volatile X& or const
11575 volatile X&, and either there are no other parameters or else all
11576 other parameters have default arguments. */
11577 if (TREE_CODE (parmtype
) == REFERENCE_TYPE
11578 && TYPE_MAIN_VARIANT (TREE_TYPE (parmtype
)) == ctype
11579 && (TREE_CHAIN (parmtypes
) == NULL_TREE
11580 || TREE_CHAIN (parmtypes
) == void_list_node
11581 || TREE_PURPOSE (TREE_CHAIN (parmtypes
)))
11582 && !(DECL_TEMPLATE_INSTANTIATION (decl
)
11583 && is_member_template (DECL_TI_TEMPLATE (decl
))))
11585 TYPE_HAS_INIT_REF (ctype
) = 1;
11586 if (CP_TYPE_CONST_P (TREE_TYPE (parmtype
)))
11587 TYPE_HAS_CONST_INIT_REF (ctype
) = 1;
11591 A declaration of a constructor for a class X is ill-formed if its
11592 first parameter is of type (optionally cv-qualified) X and either
11593 there are no other parameters or else all other parameters have
11596 We *don't* complain about member template instantiations that
11597 have this form, though; they can occur as we try to decide what
11598 constructor to use during overload resolution. Since overload
11599 resolution will never prefer such a constructor to the
11600 non-template copy constructor (which is either explicitly or
11601 implicitly defined), there's no need to worry about their
11602 existence. Theoretically, they should never even be
11603 instantiated, but that's hard to forestall. */
11604 else if (TYPE_MAIN_VARIANT (parmtype
) == ctype
11605 && (TREE_CHAIN (parmtypes
) == NULL_TREE
11606 || TREE_CHAIN (parmtypes
) == void_list_node
11607 || TREE_PURPOSE (TREE_CHAIN (parmtypes
)))
11608 && !(DECL_TEMPLATE_INSTANTIATION (decl
)
11609 && is_member_template (DECL_TI_TEMPLATE (decl
))))
11611 cp_error ("invalid constructor; you probably meant `%T (const %T&)'",
11613 SET_IDENTIFIER_ERROR_LOCUS (DECL_NAME (decl
), ctype
);
11616 else if (TREE_CODE (parmtype
) == VOID_TYPE
11617 || TREE_PURPOSE (parmtypes
) != NULL_TREE
)
11618 TYPE_HAS_DEFAULT_CONSTRUCTOR (ctype
) = 1;
11623 /* An operator with this name can be either unary or binary. */
11629 return (name
== ansi_opname
[(int) INDIRECT_REF
]
11630 || name
== ansi_opname
[(int) ADDR_EXPR
]
11631 || name
== ansi_opname
[(int) NEGATE_EXPR
]
11632 || name
== ansi_opname
[(int) POSTINCREMENT_EXPR
]
11633 || name
== ansi_opname
[(int) POSTDECREMENT_EXPR
]
11634 || name
== ansi_opname
[(int) CONVERT_EXPR
]);
11637 /* An operator with this name can only be unary. */
11643 return (name
== ansi_opname
[(int) TRUTH_NOT_EXPR
]
11644 || name
== ansi_opname
[(int) BIT_NOT_EXPR
]
11645 || name
== ansi_opname
[(int) COMPONENT_REF
]
11646 || IDENTIFIER_TYPENAME_P (name
));
11649 /* Do a little sanity-checking on how they declared their operator. */
11652 grok_op_properties (decl
, virtualp
, friendp
)
11654 int virtualp
, friendp
;
11656 tree argtypes
= TYPE_ARG_TYPES (TREE_TYPE (decl
));
11657 int methodp
= (TREE_CODE (TREE_TYPE (decl
)) == METHOD_TYPE
);
11658 tree name
= DECL_NAME (decl
);
11660 if (current_class_type
== NULL_TREE
)
11667 A user-declared copy assignment operator X::operator= is a
11668 non-static non-template member function of class X with
11669 exactly one parameter of type X, X&, const X&, volatile X& or
11670 const volatile X&. */
11671 if (name
== ansi_opname
[(int) MODIFY_EXPR
]
11672 && !(DECL_TEMPLATE_INSTANTIATION (decl
)
11673 && is_member_template (DECL_TI_TEMPLATE (decl
))))
11675 else if (name
== ansi_opname
[(int) CALL_EXPR
])
11676 TYPE_OVERLOADS_CALL_EXPR (current_class_type
) = 1;
11677 else if (name
== ansi_opname
[(int) ARRAY_REF
])
11678 TYPE_OVERLOADS_ARRAY_REF (current_class_type
) = 1;
11679 else if (name
== ansi_opname
[(int) COMPONENT_REF
]
11680 || name
== ansi_opname
[(int) MEMBER_REF
])
11681 TYPE_OVERLOADS_ARROW (current_class_type
) = 1;
11682 else if (name
== ansi_opname
[(int) NEW_EXPR
])
11683 TYPE_GETS_NEW (current_class_type
) |= 1;
11684 else if (name
== ansi_opname
[(int) DELETE_EXPR
])
11685 TYPE_GETS_DELETE (current_class_type
) |= 1;
11686 else if (name
== ansi_opname
[(int) VEC_NEW_EXPR
])
11687 TYPE_GETS_NEW (current_class_type
) |= 2;
11688 else if (name
== ansi_opname
[(int) VEC_DELETE_EXPR
])
11689 TYPE_GETS_DELETE (current_class_type
) |= 2;
11692 if (name
== ansi_opname
[(int) NEW_EXPR
]
11693 || name
== ansi_opname
[(int) VEC_NEW_EXPR
])
11695 /* When the compiler encounters the definition of A::operator new, it
11696 doesn't look at the class declaration to find out if it's static. */
11698 revert_static_member_fn (&decl
, NULL
, NULL
);
11700 /* Take care of function decl if we had syntax errors. */
11701 if (argtypes
== NULL_TREE
)
11703 = build_function_type (ptr_type_node
,
11704 hash_tree_chain (integer_type_node
,
11707 TREE_TYPE (decl
) = coerce_new_type (TREE_TYPE (decl
));
11709 else if (name
== ansi_opname
[(int) DELETE_EXPR
]
11710 || name
== ansi_opname
[(int) VEC_DELETE_EXPR
])
11713 revert_static_member_fn (&decl
, NULL
, NULL
);
11715 if (argtypes
== NULL_TREE
)
11717 = build_function_type (void_type_node
,
11718 hash_tree_chain (ptr_type_node
,
11722 TREE_TYPE (decl
) = coerce_delete_type (TREE_TYPE (decl
));
11724 if (! friendp
&& name
== ansi_opname
[(int) VEC_DELETE_EXPR
]
11725 && (TREE_CHAIN (TYPE_ARG_TYPES (TREE_TYPE (decl
)))
11726 != void_list_node
))
11727 TYPE_VEC_DELETE_TAKES_SIZE (current_class_type
) = 1;
11732 /* An operator function must either be a non-static member function
11733 or have at least one parameter of a class, a reference to a class,
11734 an enumeration, or a reference to an enumeration. 13.4.0.6 */
11735 if (! methodp
|| DECL_STATIC_FUNCTION_P (decl
))
11737 if (IDENTIFIER_TYPENAME_P (name
)
11738 || name
== ansi_opname
[(int) CALL_EXPR
]
11739 || name
== ansi_opname
[(int) MODIFY_EXPR
]
11740 || name
== ansi_opname
[(int) COMPONENT_REF
]
11741 || name
== ansi_opname
[(int) ARRAY_REF
])
11742 cp_error ("`%D' must be a nonstatic member function", decl
);
11747 if (DECL_STATIC_FUNCTION_P (decl
))
11748 cp_error ("`%D' must be either a non-static member function or a non-member function", decl
);
11751 for (; TREE_CODE (TREE_VALUE (p
)) != VOID_TYPE
; p
= TREE_CHAIN (p
))
11753 tree arg
= TREE_VALUE (p
);
11754 if (TREE_CODE (arg
) == REFERENCE_TYPE
)
11755 arg
= TREE_TYPE (arg
);
11757 /* This lets bad template code slip through. */
11758 if (IS_AGGR_TYPE (arg
)
11759 || TREE_CODE (arg
) == ENUMERAL_TYPE
11760 || TREE_CODE (arg
) == TEMPLATE_TYPE_PARM
11761 || TREE_CODE (arg
) == TEMPLATE_TEMPLATE_PARM
)
11765 ("`%D' must have an argument of class or enumerated type",
11772 if (name
== ansi_opname
[(int) CALL_EXPR
])
11773 return; /* No restrictions on args. */
11775 if (IDENTIFIER_TYPENAME_P (name
) && ! DECL_TEMPLATE_INFO (decl
))
11777 tree t
= TREE_TYPE (name
);
11778 if (TREE_CODE (t
) == VOID_TYPE
)
11779 pedwarn ("void is not a valid type conversion operator");
11780 else if (! friendp
)
11782 int ref
= (TREE_CODE (t
) == REFERENCE_TYPE
);
11783 const char *what
= 0;
11785 t
= TYPE_MAIN_VARIANT (TREE_TYPE (t
));
11787 if (t
== current_class_type
)
11788 what
= "the same type";
11789 /* Don't force t to be complete here. */
11790 else if (IS_AGGR_TYPE (t
)
11792 && DERIVED_FROM_P (t
, current_class_type
))
11793 what
= "a base class";
11796 warning ("conversion to %s%s will never use a type conversion operator",
11797 ref
? "a reference to " : "", what
);
11801 if (name
== ansi_opname
[(int) MODIFY_EXPR
])
11805 if (list_length (argtypes
) != 3 && methodp
)
11807 cp_error ("`%D' must take exactly one argument", decl
);
11810 parmtype
= TREE_VALUE (TREE_CHAIN (argtypes
));
11812 if (copy_assignment_arg_p (parmtype
, virtualp
)
11815 TYPE_HAS_ASSIGN_REF (current_class_type
) = 1;
11816 if (TREE_CODE (parmtype
) != REFERENCE_TYPE
11817 || CP_TYPE_CONST_P (TREE_TYPE (parmtype
)))
11818 TYPE_HAS_CONST_ASSIGN_REF (current_class_type
) = 1;
11821 else if (name
== ansi_opname
[(int) COND_EXPR
])
11824 cp_error ("ANSI C++ prohibits overloading operator ?:");
11826 else if (ambi_op_p (name
))
11828 if (list_length (argtypes
) == 2)
11830 else if (list_length (argtypes
) == 3)
11832 if ((name
== ansi_opname
[(int) POSTINCREMENT_EXPR
]
11833 || name
== ansi_opname
[(int) POSTDECREMENT_EXPR
])
11834 && ! processing_template_decl
11835 && ! same_type_p (TREE_VALUE (TREE_CHAIN (argtypes
)), integer_type_node
))
11838 cp_error ("postfix `%D' must take `int' as its argument",
11842 ("postfix `%D' must take `int' as its second argument",
11849 cp_error ("`%D' must take either zero or one argument", decl
);
11851 cp_error ("`%D' must take either one or two arguments", decl
);
11854 /* More Effective C++ rule 6. */
11856 && (name
== ansi_opname
[(int) POSTINCREMENT_EXPR
]
11857 || name
== ansi_opname
[(int) POSTDECREMENT_EXPR
]))
11859 tree arg
= TREE_VALUE (argtypes
);
11860 tree ret
= TREE_TYPE (TREE_TYPE (decl
));
11861 if (methodp
|| TREE_CODE (arg
) == REFERENCE_TYPE
)
11862 arg
= TREE_TYPE (arg
);
11863 arg
= TYPE_MAIN_VARIANT (arg
);
11864 if (list_length (argtypes
) == 2)
11866 if (TREE_CODE (ret
) != REFERENCE_TYPE
11867 || !same_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (ret
)),
11869 cp_warning ("prefix `%D' should return `%T'", decl
,
11870 build_reference_type (arg
));
11874 if (!same_type_p (TYPE_MAIN_VARIANT (ret
), arg
))
11875 cp_warning ("postfix `%D' should return `%T'", decl
, arg
);
11879 else if (unary_op_p (name
))
11881 if (list_length (argtypes
) != 2)
11884 cp_error ("`%D' must take `void'", decl
);
11886 cp_error ("`%D' must take exactly one argument", decl
);
11889 else /* if (binary_op_p (name)) */
11891 if (list_length (argtypes
) != 3)
11894 cp_error ("`%D' must take exactly one argument", decl
);
11896 cp_error ("`%D' must take exactly two arguments", decl
);
11899 /* More Effective C++ rule 7. */
11901 && (name
== ansi_opname
[TRUTH_ANDIF_EXPR
]
11902 || name
== ansi_opname
[TRUTH_ORIF_EXPR
]
11903 || name
== ansi_opname
[COMPOUND_EXPR
]))
11904 cp_warning ("user-defined `%D' always evaluates both arguments",
11908 /* Effective C++ rule 23. */
11910 && list_length (argtypes
) == 3
11911 && (name
== ansi_opname
[PLUS_EXPR
]
11912 || name
== ansi_opname
[MINUS_EXPR
]
11913 || name
== ansi_opname
[TRUNC_DIV_EXPR
]
11914 || name
== ansi_opname
[MULT_EXPR
])
11915 && TREE_CODE (TREE_TYPE (TREE_TYPE (decl
))) == REFERENCE_TYPE
)
11916 cp_warning ("`%D' should return by value", decl
);
11920 for (; argtypes
!= void_list_node
; argtypes
= TREE_CHAIN (argtypes
))
11921 if (TREE_PURPOSE (argtypes
))
11923 TREE_PURPOSE (argtypes
) = NULL_TREE
;
11924 if (name
== ansi_opname
[(int) POSTINCREMENT_EXPR
]
11925 || name
== ansi_opname
[(int) POSTDECREMENT_EXPR
])
11928 cp_pedwarn ("`%D' cannot have default arguments", decl
);
11931 cp_error ("`%D' cannot have default arguments", decl
);
11936 static const char *
11938 enum tag_types code
;
11951 my_friendly_abort (981122);
11955 /* Get the struct, enum or union (CODE says which) with tag NAME.
11956 Define the tag as a forward-reference if it is not defined.
11958 C++: If a class derivation is given, process it here, and report
11959 an error if multiple derivation declarations are not identical.
11961 If this is a definition, come in through xref_tag and only look in
11962 the current frame for the name (since C++ allows new names in any
11966 xref_tag (code_type_node
, name
, globalize
)
11967 tree code_type_node
;
11971 enum tag_types tag_code
;
11972 enum tree_code code
;
11974 register tree ref
, t
;
11975 struct binding_level
*b
= current_binding_level
;
11977 tree attributes
= NULL_TREE
;
11978 tree context
= NULL_TREE
;
11980 /* If we are called from the parser, code_type_node will sometimes be a
11981 TREE_LIST. This indicates that the user wrote
11982 "class __attribute__ ((foo)) bar". Extract the attributes so we can
11984 if (TREE_CODE (code_type_node
) == TREE_LIST
)
11986 attributes
= TREE_PURPOSE (code_type_node
);
11987 code_type_node
= TREE_VALUE (code_type_node
);
11990 tag_code
= (enum tag_types
) TREE_INT_CST_LOW (code_type_node
);
11995 code
= RECORD_TYPE
;
12001 code
= ENUMERAL_TYPE
;
12004 my_friendly_abort (18);
12007 /* If a cross reference is requested, look up the type
12008 already defined for this tag and return it. */
12009 if (TREE_CODE_CLASS (TREE_CODE (name
)) == 't')
12012 name
= TYPE_IDENTIFIER (t
);
12016 t
= IDENTIFIER_TYPE_VALUE (name
);
12018 if (t
&& TREE_CODE (t
) != code
&& TREE_CODE (t
) != TEMPLATE_TYPE_PARM
12019 && TREE_CODE (t
) != TEMPLATE_TEMPLATE_PARM
)
12024 /* If we know we are defining this tag, only look it up in
12025 this scope and don't try to find it as a type. */
12026 ref
= lookup_tag (code
, name
, b
, 1);
12032 /* [dcl.type.elab] If the identifier resolves to a
12033 typedef-name or a template type-parameter, the
12034 elaborated-type-specifier is ill-formed. */
12035 if (t
!= TYPE_MAIN_VARIANT (t
)
12036 || (CLASS_TYPE_P (t
) && TYPE_WAS_ANONYMOUS (t
)))
12037 cp_pedwarn ("using typedef-name `%D' after `%s'",
12038 TYPE_NAME (t
), tag_name (tag_code
));
12039 else if (TREE_CODE (t
) == TEMPLATE_TYPE_PARM
)
12040 cp_error ("using template type parameter `%T' after `%s'",
12041 t
, tag_name (tag_code
));
12046 ref
= lookup_tag (code
, name
, b
, 0);
12050 /* Try finding it as a type declaration. If that wins,
12052 ref
= lookup_name (name
, 1);
12054 if (ref
!= NULL_TREE
12055 && processing_template_decl
12056 && DECL_CLASS_TEMPLATE_P (ref
)
12057 && template_class_depth (current_class_type
) == 0)
12058 /* Since GLOBALIZE is true, we're declaring a global
12059 template, so we want this type. */
12060 ref
= DECL_RESULT (ref
);
12062 if (ref
&& TREE_CODE (ref
) == TYPE_DECL
12063 && TREE_CODE (TREE_TYPE (ref
)) == code
)
12064 ref
= TREE_TYPE (ref
);
12069 if (ref
&& current_class_type
12070 && template_class_depth (current_class_type
)
12071 && PROCESSING_REAL_TEMPLATE_DECL_P ())
12073 /* Since GLOBALIZE is non-zero, we are not looking at a
12074 definition of this tag. Since, in addition, we are currently
12075 processing a (member) template declaration of a template
12076 class, we must be very careful; consider:
12083 { template <class V>
12084 friend struct S1; };
12086 Here, the S2::S1 declaration should not be confused with the
12087 outer declaration. In particular, the inner version should
12088 have a template parameter of level 2, not level 1. This
12089 would be particularly important if the member declaration
12092 template <class V = U> friend struct S1;
12094 say, when we should tsubst into `U' when instantiating
12095 S2. On the other hand, when presented with:
12105 we must find the inner binding eventually. We
12106 accomplish this by making sure that the new type we
12107 create to represent this declaration has the right
12109 context
= TYPE_CONTEXT (ref
);
12114 push_obstacks_nochange ();
12118 /* If no such tag is yet defined, create a forward-reference node
12119 and record it as the "definition".
12120 When a real declaration of this type is found,
12121 the forward-reference will be altered into a real type. */
12123 /* In C++, since these migrate into the global scope, we must
12124 build them on the permanent obstack. */
12126 temp
= allocation_temporary_p ();
12128 end_temporary_allocation ();
12130 if (code
== ENUMERAL_TYPE
)
12132 cp_error ("use of enum `%#D' without previous declaration", name
);
12134 ref
= make_node (ENUMERAL_TYPE
);
12136 /* Give the type a default layout like unsigned int
12137 to avoid crashing if it does not get defined. */
12138 TYPE_MODE (ref
) = TYPE_MODE (unsigned_type_node
);
12139 TYPE_ALIGN (ref
) = TYPE_ALIGN (unsigned_type_node
);
12140 TREE_UNSIGNED (ref
) = 1;
12141 TYPE_PRECISION (ref
) = TYPE_PRECISION (unsigned_type_node
);
12142 TYPE_MIN_VALUE (ref
) = TYPE_MIN_VALUE (unsigned_type_node
);
12143 TYPE_MAX_VALUE (ref
) = TYPE_MAX_VALUE (unsigned_type_node
);
12145 /* Enable us to recognize when a type is created in class context.
12146 To do nested classes correctly, this should probably be cleared
12147 out when we leave this classes scope. Currently this in only
12148 done in `start_enum'. */
12150 pushtag (name
, ref
, globalize
);
12154 struct binding_level
*old_b
= class_binding_level
;
12156 ref
= make_lang_type (code
);
12157 TYPE_CONTEXT (ref
) = context
;
12159 #ifdef NONNESTED_CLASSES
12160 /* Class types don't nest the way enums do. */
12161 class_binding_level
= (struct binding_level
*)0;
12163 pushtag (name
, ref
, globalize
);
12164 class_binding_level
= old_b
;
12169 /* If it no longer looks like a nested type, make sure it's
12171 If it is not an IDENTIFIER, this is not a declaration */
12172 if (b
->namespace_p
&& !class_binding_level
12173 && TREE_CODE (name
) == IDENTIFIER_NODE
12174 && IDENTIFIER_NAMESPACE_VALUE (name
) == NULL_TREE
)
12175 SET_IDENTIFIER_NAMESPACE_VALUE (name
, TYPE_NAME (ref
));
12177 if (!globalize
&& processing_template_decl
&& IS_AGGR_TYPE (ref
))
12178 redeclare_class_template (ref
, current_template_parms
);
12181 /* Until the type is defined, tentatively accept whatever
12182 structure tag the user hands us. */
12183 if (TYPE_SIZE (ref
) == NULL_TREE
12184 && ref
!= current_class_type
12185 /* Have to check this, in case we have contradictory tag info. */
12186 && IS_AGGR_TYPE_CODE (TREE_CODE (ref
)))
12188 if (tag_code
== class_type
)
12189 CLASSTYPE_DECLARED_CLASS (ref
) = 1;
12190 else if (tag_code
== record_type
)
12191 CLASSTYPE_DECLARED_CLASS (ref
) = 0;
12196 TREE_TYPE (ref
) = attributes
;
12202 xref_tag_from_type (old
, id
, globalize
)
12206 tree code_type_node
;
12208 if (TREE_CODE (old
) == RECORD_TYPE
)
12209 code_type_node
= (CLASSTYPE_DECLARED_CLASS (old
)
12210 ? class_type_node
: record_type_node
);
12212 code_type_node
= union_type_node
;
12214 if (id
== NULL_TREE
)
12215 id
= TYPE_IDENTIFIER (old
);
12217 return xref_tag (code_type_node
, id
, globalize
);
12220 /* REF is a type (named NAME), for which we have just seen some
12221 baseclasses. BINFO is a list of those baseclasses; the
12222 TREE_PURPOSE is an access_* node, and the TREE_VALUE is the type of
12223 the base-class. CODE_TYPE_NODE indicates whether REF is a class,
12224 struct, or union. */
12227 xref_basetypes (code_type_node
, name
, ref
, binfo
)
12228 tree code_type_node
;
12232 /* In the declaration `A : X, Y, ... Z' we mark all the types
12233 (A, X, Y, ..., Z) so we can check for duplicates. */
12238 enum tag_types tag_code
= (enum tag_types
) TREE_INT_CST_LOW (code_type_node
);
12240 if (tag_code
== union_type
)
12242 cp_error ("derived union `%T' invalid", ref
);
12246 len
= list_length (binfo
);
12247 push_obstacks (TYPE_OBSTACK (ref
), TYPE_OBSTACK (ref
));
12249 /* First, make sure that any templates in base-classes are
12250 instantiated. This ensures that if we call ourselves recursively
12251 we do not get confused about which classes are marked and which
12253 for (base
= binfo
; base
; base
= TREE_CHAIN (base
))
12254 complete_type (TREE_VALUE (base
));
12256 SET_CLASSTYPE_MARKED (ref
);
12257 BINFO_BASETYPES (TYPE_BINFO (ref
)) = binfos
= make_tree_vec (len
);
12259 for (i
= 0; binfo
; binfo
= TREE_CHAIN (binfo
))
12261 /* The base of a derived struct is public by default. */
12263 = (TREE_PURPOSE (binfo
) == access_public_node
12264 || TREE_PURPOSE (binfo
) == access_public_virtual_node
12265 || (tag_code
!= class_type
12266 && (TREE_PURPOSE (binfo
) == access_default_node
12267 || TREE_PURPOSE (binfo
) == access_default_virtual_node
)));
12269 = (TREE_PURPOSE (binfo
) == access_protected_node
12270 || TREE_PURPOSE (binfo
) == access_protected_virtual_node
);
12272 = (TREE_PURPOSE (binfo
) == access_private_virtual_node
12273 || TREE_PURPOSE (binfo
) == access_protected_virtual_node
12274 || TREE_PURPOSE (binfo
) == access_public_virtual_node
12275 || TREE_PURPOSE (binfo
) == access_default_virtual_node
);
12276 tree basetype
= TREE_VALUE (binfo
);
12279 if (basetype
&& TREE_CODE (basetype
) == TYPE_DECL
)
12280 basetype
= TREE_TYPE (basetype
);
12282 || (TREE_CODE (basetype
) != RECORD_TYPE
12283 && TREE_CODE (basetype
) != TYPENAME_TYPE
12284 && TREE_CODE (basetype
) != TEMPLATE_TYPE_PARM
12285 && TREE_CODE (basetype
) != TEMPLATE_TEMPLATE_PARM
))
12287 cp_error ("base type `%T' fails to be a struct or class type",
12288 TREE_VALUE (binfo
));
12292 GNU_xref_hier (name
, basetype
, via_public
, via_virtual
, 0);
12294 /* This code replaces similar code in layout_basetypes.
12295 We put the complete_type first for implicit `typename'. */
12296 if (TYPE_SIZE (basetype
) == NULL_TREE
12297 && ! (current_template_parms
&& uses_template_parms (basetype
)))
12299 cp_error ("base class `%T' has incomplete type", basetype
);
12304 if (CLASSTYPE_MARKED (basetype
))
12306 if (basetype
== ref
)
12307 cp_error ("recursive type `%T' undefined", basetype
);
12309 cp_error ("duplicate base type `%T' invalid", basetype
);
12313 if (TYPE_FOR_JAVA (basetype
)
12314 && (current_lang_stack
12315 == &VARRAY_TREE (current_lang_base
, 0)))
12316 TYPE_FOR_JAVA (ref
) = 1;
12318 /* Note that the BINFO records which describe individual
12319 inheritances are *not* shared in the lattice! They
12320 cannot be shared because a given baseclass may be
12321 inherited with different `accessibility' by different
12322 derived classes. (Each BINFO record describing an
12323 individual inheritance contains flags which say what
12324 the `accessibility' of that particular inheritance is.) */
12327 = make_binfo (integer_zero_node
, basetype
,
12328 CLASS_TYPE_P (basetype
)
12329 ? TYPE_BINFO_VTABLE (basetype
) : NULL_TREE
,
12330 CLASS_TYPE_P (basetype
)
12331 ? TYPE_BINFO_VIRTUALS (basetype
) : NULL_TREE
);
12333 TREE_VEC_ELT (binfos
, i
) = base_binfo
;
12334 TREE_VIA_PUBLIC (base_binfo
) = via_public
;
12335 TREE_VIA_PROTECTED (base_binfo
) = via_protected
;
12336 TREE_VIA_VIRTUAL (base_binfo
) = via_virtual
;
12337 BINFO_INHERITANCE_CHAIN (base_binfo
) = TYPE_BINFO (ref
);
12339 /* We need to unshare the binfos now so that lookups during class
12340 definition work. */
12341 unshare_base_binfos (base_binfo
);
12343 SET_CLASSTYPE_MARKED (basetype
);
12345 /* We are free to modify these bits because they are meaningless
12346 at top level, and BASETYPE is a top-level type. */
12347 if (via_virtual
|| TYPE_USES_VIRTUAL_BASECLASSES (basetype
))
12349 TYPE_USES_VIRTUAL_BASECLASSES (ref
) = 1;
12350 TYPE_USES_COMPLEX_INHERITANCE (ref
) = 1;
12353 if (CLASS_TYPE_P (basetype
))
12355 TYPE_GETS_NEW (ref
) |= TYPE_GETS_NEW (basetype
);
12356 TYPE_GETS_DELETE (ref
) |= TYPE_GETS_DELETE (basetype
);
12363 TREE_VEC_LENGTH (binfos
) = i
;
12365 BINFO_BASETYPES (TYPE_BINFO (ref
)) = NULL_TREE
;
12368 TYPE_USES_MULTIPLE_INHERITANCE (ref
) = 1;
12371 tree basetype
= BINFO_TYPE (TREE_VEC_ELT (binfos
, 0));
12373 if (CLASS_TYPE_P (basetype
))
12374 TYPE_USES_MULTIPLE_INHERITANCE (ref
)
12375 = TYPE_USES_MULTIPLE_INHERITANCE (basetype
);
12378 if (TYPE_USES_MULTIPLE_INHERITANCE (ref
))
12379 TYPE_USES_COMPLEX_INHERITANCE (ref
) = 1;
12381 /* Unmark all the types. */
12383 CLEAR_CLASSTYPE_MARKED (BINFO_TYPE (TREE_VEC_ELT (binfos
, i
)));
12384 CLEAR_CLASSTYPE_MARKED (ref
);
12386 /* Now that we know all the base-classes, set up the list of virtual
12388 CLASSTYPE_VBASECLASSES (ref
) = get_vbase_types (ref
);
12394 /* Begin compiling the definition of an enumeration type.
12395 NAME is its name (or null if anonymous).
12396 Returns the type object, as yet incomplete.
12397 Also records info about it so that build_enumerator
12398 may be used to declare the individual values as they are read. */
12404 register tree enumtype
= NULL_TREE
;
12405 struct binding_level
*b
= current_binding_level
;
12407 /* We are wasting space here and putting these on the permanent_obstack so
12408 that typeid(local enum) will work correctly. */
12409 push_obstacks (&permanent_obstack
, &permanent_obstack
);
12411 /* If this is the real definition for a previous forward reference,
12412 fill in the contents in the same object that used to be the
12413 forward reference. */
12415 if (name
!= NULL_TREE
)
12416 enumtype
= lookup_tag (ENUMERAL_TYPE
, name
, b
, 1);
12418 if (enumtype
!= NULL_TREE
&& TREE_CODE (enumtype
) == ENUMERAL_TYPE
)
12420 cp_error ("multiple definition of `%#T'", enumtype
);
12421 cp_error_at ("previous definition here", enumtype
);
12425 enumtype
= make_node (ENUMERAL_TYPE
);
12426 pushtag (name
, enumtype
, 0);
12429 if (current_class_type
)
12430 TREE_ADDRESSABLE (b
->tags
) = 1;
12432 /* We don't copy this value because build_enumerator needs to do it. */
12433 enum_next_value
= integer_zero_node
;
12436 GNU_xref_decl (current_function_decl
, enumtype
);
12440 /* After processing and defining all the values of an enumeration type,
12441 install their decls in the enumeration type and finish it off.
12442 ENUMTYPE is the type object and VALUES a list of name-value pairs.
12443 Returns ENUMTYPE. */
12446 finish_enum (enumtype
)
12449 register tree minnode
= NULL_TREE
, maxnode
= NULL_TREE
;
12450 /* Calculate the maximum value of any enumerator in this type. */
12452 tree values
= TYPE_VALUES (enumtype
);
12457 for (pair
= values
; pair
; pair
= TREE_CHAIN (pair
))
12462 /* The TREE_VALUE is a CONST_DECL for this enumeration
12464 decl
= TREE_VALUE (pair
);
12466 /* The DECL_INITIAL will be NULL if we are processing a
12467 template declaration and this enumeration constant had no
12468 explicit initializer. */
12469 value
= DECL_INITIAL (decl
);
12470 if (value
&& !processing_template_decl
)
12472 /* Set the TREE_TYPE for the VALUE as well. That's so
12473 that when we call decl_constant_value we get an
12474 entity of the right type (but with the constant
12475 value). Since we shouldn't ever call
12476 decl_constant_value on a template type, there's no
12477 reason to do that when processing_template_decl.
12478 And, if the expression is something like a
12479 TEMPLATE_PARM_INDEX or a CAST_EXPR doing so will
12480 wreak havoc on the intended type of the expression.
12482 Of course, there's also no point in trying to compute
12483 minimum or maximum values if we're in a template. */
12484 TREE_TYPE (value
) = enumtype
;
12487 minnode
= maxnode
= value
;
12488 else if (tree_int_cst_lt (maxnode
, value
))
12490 else if (tree_int_cst_lt (value
, minnode
))
12494 if (processing_template_decl
)
12495 /* If this is just a template, leave the CONST_DECL
12496 alone. That way tsubst_copy will find CONST_DECLs for
12497 CONST_DECLs, and not INTEGER_CSTs. */
12500 /* In the list we're building up, we want the enumeration
12501 values, not the CONST_DECLs. */
12502 TREE_VALUE (pair
) = value
;
12506 maxnode
= minnode
= integer_zero_node
;
12508 TYPE_VALUES (enumtype
) = nreverse (values
);
12510 if (processing_template_decl
)
12512 tree scope
= current_scope ();
12513 if (scope
&& TREE_CODE (scope
) == FUNCTION_DECL
)
12514 add_tree (build_min (TAG_DEFN
, enumtype
));
12518 int unsignedp
= tree_int_cst_sgn (minnode
) >= 0;
12519 int lowprec
= min_precision (minnode
, unsignedp
);
12520 int highprec
= min_precision (maxnode
, unsignedp
);
12521 int precision
= MAX (lowprec
, highprec
);
12524 TYPE_SIZE (enumtype
) = NULL_TREE
;
12526 /* Set TYPE_MIN_VALUE and TYPE_MAX_VALUE according to `precision'. */
12528 TYPE_PRECISION (enumtype
) = precision
;
12530 fixup_unsigned_type (enumtype
);
12532 fixup_signed_type (enumtype
);
12534 if (flag_short_enums
|| (precision
> TYPE_PRECISION (integer_type_node
)))
12535 /* Use the width of the narrowest normal C type which is wide
12537 TYPE_PRECISION (enumtype
) = TYPE_PRECISION (type_for_size
12540 TYPE_PRECISION (enumtype
) = TYPE_PRECISION (integer_type_node
);
12542 TYPE_SIZE (enumtype
) = 0;
12543 layout_type (enumtype
);
12545 /* Fix up all variant types of this enum type. */
12546 for (tem
= TYPE_MAIN_VARIANT (enumtype
); tem
;
12547 tem
= TYPE_NEXT_VARIANT (tem
))
12549 TYPE_VALUES (tem
) = TYPE_VALUES (enumtype
);
12550 TYPE_MIN_VALUE (tem
) = TYPE_MIN_VALUE (enumtype
);
12551 TYPE_MAX_VALUE (tem
) = TYPE_MAX_VALUE (enumtype
);
12552 TYPE_SIZE (tem
) = TYPE_SIZE (enumtype
);
12553 TYPE_SIZE_UNIT (tem
) = TYPE_SIZE_UNIT (enumtype
);
12554 TYPE_MODE (tem
) = TYPE_MODE (enumtype
);
12555 TYPE_PRECISION (tem
) = TYPE_PRECISION (enumtype
);
12556 TYPE_ALIGN (tem
) = TYPE_ALIGN (enumtype
);
12557 TREE_UNSIGNED (tem
) = TREE_UNSIGNED (enumtype
);
12560 /* Finish debugging output for this type. */
12561 rest_of_type_compilation (enumtype
, namespace_bindings_p ());
12564 /* In start_enum we pushed obstacks. Here, we must pop them. */
12570 /* Build and install a CONST_DECL for an enumeration constant of the
12571 enumeration type TYPE whose NAME and VALUE (if any) are provided.
12572 Assignment of sequential values by default is handled here. */
12575 build_enumerator (name
, value
, type
)
12583 /* Remove no-op casts from the value. */
12585 STRIP_TYPE_NOPS (value
);
12587 if (! processing_template_decl
)
12589 /* Validate and default VALUE. */
12590 if (value
!= NULL_TREE
)
12592 if (TREE_READONLY_DECL_P (value
))
12593 value
= decl_constant_value (value
);
12595 if (TREE_CODE (value
) == INTEGER_CST
)
12597 value
= default_conversion (value
);
12598 constant_expression_warning (value
);
12602 cp_error ("enumerator value for `%D' not integer constant", name
);
12607 /* Default based on previous value. */
12608 if (value
== NULL_TREE
&& ! processing_template_decl
)
12610 value
= enum_next_value
;
12612 cp_error ("overflow in enumeration values at `%D'", name
);
12615 /* Remove no-op casts from the value. */
12617 STRIP_TYPE_NOPS (value
);
12619 /* To fix MAX_VAL enum consts. (bkoz) */
12620 TREE_TYPE (value
) = integer_type_node
;
12624 /* We always have to copy here; not all INTEGER_CSTs are unshared.
12625 Even in other cases, we will later (in finish_enum) be setting the
12627 if (value
!= NULL_TREE
)
12628 value
= copy_node (value
);
12630 /* C++ associates enums with global, function, or class declarations. */
12632 context
= current_scope ();
12633 if (context
&& context
== current_class_type
)
12634 /* This enum declaration is local to the class. */
12635 decl
= build_lang_decl (CONST_DECL
, name
, type
);
12637 /* It's a global enum, or it's local to a function. (Note local to
12638 a function could mean local to a class method. */
12639 decl
= build_decl (CONST_DECL
, name
, type
);
12641 DECL_CONTEXT (decl
) = FROB_CONTEXT (context
);
12642 DECL_INITIAL (decl
) = value
;
12643 TREE_READONLY (decl
) = 1;
12645 if (context
&& context
== current_class_type
)
12646 /* In something like `struct S { enum E { i = 7 }; };' we put `i'
12647 on the TYPE_FIELDS list for `S'. (That's so that you can say
12648 things like `S::i' later.) */
12649 finish_member_declaration (decl
);
12653 GNU_xref_decl (current_function_decl
, decl
);
12656 if (! processing_template_decl
)
12658 /* Set basis for default for next value. */
12659 enum_next_value
= build_binary_op_nodefault (PLUS_EXPR
, value
,
12660 integer_one_node
, PLUS_EXPR
);
12661 enum_overflow
= tree_int_cst_lt (enum_next_value
, value
);
12664 result
= tree_cons (name
, decl
, NULL_TREE
);
12669 static int function_depth
;
12671 /* We're defining DECL. Make sure that it's type is OK. */
12674 check_function_type (decl
)
12677 tree fntype
= TREE_TYPE (decl
);
12679 /* In a function definition, arg types must be complete. */
12680 require_complete_types_for_parms (current_function_parms
);
12682 if (TYPE_SIZE (complete_type (TREE_TYPE (fntype
))) == NULL_TREE
)
12684 cp_error ("return type `%#T' is incomplete", TREE_TYPE (fntype
));
12686 /* Make it return void instead, but don't change the
12687 type of the DECL_RESULT, in case we have a named return value. */
12688 if (TREE_CODE (fntype
) == METHOD_TYPE
)
12690 tree ctype
= TREE_TYPE (TREE_VALUE (TYPE_ARG_TYPES (fntype
)));
12692 = build_cplus_method_type (ctype
,
12694 FUNCTION_ARG_CHAIN (decl
));
12698 = build_function_type (void_type_node
,
12699 TYPE_ARG_TYPES (TREE_TYPE (decl
)));
12701 = build_exception_variant (fntype
,
12702 TYPE_RAISES_EXCEPTIONS (fntype
));
12705 abstract_virtuals_error (decl
, TREE_TYPE (fntype
));
12708 /* Create the FUNCTION_DECL for a function definition.
12709 DECLSPECS and DECLARATOR are the parts of the declaration;
12710 they describe the function's name and the type it returns,
12711 but twisted together in a fashion that parallels the syntax of C.
12713 FLAGS is a bitwise or of SF_PRE_PARSED (indicating that the
12714 DECLARATOR is really the DECL for the function we are about to
12715 process and that DECLSPECS should be ignored), SF_INCLASS_INLINE
12716 indicating that the function is an inline defined in-class, and
12717 SF_EXPAND indicating that we should generate RTL for this
12720 This function creates a binding context for the function body
12721 as well as setting up the FUNCTION_DECL in current_function_decl.
12723 Returns 1 on success. If the DECLARATOR is not suitable for a function
12724 (it defines a datum instead), we return 0, which tells
12725 yyparse to report a parse error.
12727 For C++, we must first check whether that datum makes any sense.
12728 For example, "class A local_a(1,2);" means that variable local_a
12729 is an aggregate of type A, which should have a constructor
12730 applied to it with the argument list [1, 2]. */
12733 start_function (declspecs
, declarator
, attrs
, flags
)
12734 tree declspecs
, declarator
, attrs
;
12738 tree ctype
= NULL_TREE
;
12741 extern int have_extern_spec
;
12742 extern int used_extern_spec
;
12743 int doing_friend
= 0;
12744 struct binding_level
*bl
;
12746 /* Sanity check. */
12747 my_friendly_assert (TREE_CODE (TREE_VALUE (void_list_node
)) == VOID_TYPE
, 160);
12748 my_friendly_assert (TREE_CHAIN (void_list_node
) == NULL_TREE
, 161);
12750 /* This should only be done once on the top most decl. */
12751 if (have_extern_spec
&& !used_extern_spec
)
12753 declspecs
= decl_tree_cons (NULL_TREE
, get_identifier ("extern"), declspecs
);
12754 used_extern_spec
= 1;
12757 if (flags
& SF_PRE_PARSED
)
12759 decl1
= declarator
;
12761 fntype
= TREE_TYPE (decl1
);
12762 if (TREE_CODE (fntype
) == METHOD_TYPE
)
12763 ctype
= TYPE_METHOD_BASETYPE (fntype
);
12765 /* ANSI C++ June 5 1992 WP 11.4.5. A friend function defined in a
12766 class is in the (lexical) scope of the class in which it is
12768 if (!ctype
&& DECL_FRIEND_P (decl1
))
12770 ctype
= DECL_CLASS_CONTEXT (decl1
);
12772 /* CTYPE could be null here if we're dealing with a template;
12773 for example, `inline friend float foo()' inside a template
12774 will have no CTYPE set. */
12775 if (ctype
&& TREE_CODE (ctype
) != RECORD_TYPE
)
12781 last_function_parms
= DECL_ARGUMENTS (decl1
);
12782 last_function_parm_tags
= NULL_TREE
;
12786 decl1
= grokdeclarator (declarator
, declspecs
, FUNCDEF
, 1, NULL_TREE
);
12787 /* If the declarator is not suitable for a function definition,
12788 cause a syntax error. */
12789 if (decl1
== NULL_TREE
|| TREE_CODE (decl1
) != FUNCTION_DECL
) return 0;
12791 fntype
= TREE_TYPE (decl1
);
12793 restype
= TREE_TYPE (fntype
);
12794 if (CLASS_TYPE_P (restype
) && !CLASSTYPE_GOT_SEMICOLON (restype
))
12796 cp_error ("semicolon missing after declaration of `%#T'", restype
);
12797 shadow_tag (build_expr_list (NULL_TREE
, restype
));
12798 CLASSTYPE_GOT_SEMICOLON (restype
) = 1;
12799 if (TREE_CODE (fntype
) == FUNCTION_TYPE
)
12800 fntype
= build_function_type (integer_type_node
,
12801 TYPE_ARG_TYPES (fntype
));
12803 fntype
= build_cplus_method_type (build_type_variant (TYPE_METHOD_BASETYPE (fntype
), TREE_READONLY (decl1
), TREE_SIDE_EFFECTS (decl1
)),
12805 TYPE_ARG_TYPES (fntype
));
12806 TREE_TYPE (decl1
) = fntype
;
12809 if (TREE_CODE (fntype
) == METHOD_TYPE
)
12810 ctype
= TYPE_METHOD_BASETYPE (fntype
);
12811 else if (DECL_MAIN_P (decl1
))
12813 /* If this doesn't return integer_type, complain. */
12814 if (TREE_TYPE (TREE_TYPE (decl1
)) != integer_type_node
)
12816 if (pedantic
|| warn_return_type
)
12817 pedwarn ("return type for `main' changed to `int'");
12818 TREE_TYPE (decl1
) = fntype
= default_function_type
;
12823 /* Sometimes we don't notice that a function is a static member, and
12824 build a METHOD_TYPE for it. Fix that up now. */
12825 if (ctype
!= NULL_TREE
&& DECL_STATIC_FUNCTION_P (decl1
)
12826 && TREE_CODE (TREE_TYPE (decl1
)) == METHOD_TYPE
)
12828 revert_static_member_fn (&decl1
, NULL
, NULL
);
12829 last_function_parms
= TREE_CHAIN (last_function_parms
);
12833 /* Warn if function was previously implicitly declared
12834 (but not if we warned then). */
12835 if (! warn_implicit
12836 && IDENTIFIER_IMPLICIT_DECL (DECL_NAME (decl1
)) != NULL_TREE
)
12837 cp_warning_at ("`%D' implicitly declared before its definition", IDENTIFIER_IMPLICIT_DECL (DECL_NAME (decl1
)));
12839 /* Set up current_class_type, and enter the scope of the class, if
12842 push_nested_class (ctype
, 1);
12843 else if (DECL_STATIC_FUNCTION_P (decl1
))
12844 push_nested_class (DECL_CONTEXT (decl1
), 2);
12846 /* Now that we have entered the scope of the class, we must restore
12847 the bindings for any template parameters surrounding DECL1, if it
12848 is an inline member template. (Order is important; consider the
12849 case where a template parameter has the same name as a field of
12850 the class.) It is not until after this point that
12851 PROCESSING_TEMPLATE_DECL is guaranteed to be set up correctly. */
12852 if (flags
& SF_INCLASS_INLINE
)
12853 maybe_begin_member_template_processing (decl1
);
12855 /* Effective C++ rule 15. See also c_expand_return. */
12857 && DECL_NAME (decl1
) == ansi_opname
[(int) MODIFY_EXPR
]
12858 && TREE_CODE (TREE_TYPE (fntype
)) == VOID_TYPE
)
12859 cp_warning ("`operator=' should return a reference to `*this'");
12861 /* Make the init_value nonzero so pushdecl knows this is not tentative.
12862 error_mark_node is replaced below (in poplevel) with the BLOCK. */
12863 if (!DECL_INITIAL (decl1
))
12864 DECL_INITIAL (decl1
) = error_mark_node
;
12866 #ifdef SET_DEFAULT_DECL_ATTRIBUTES
12867 SET_DEFAULT_DECL_ATTRIBUTES (decl1
, attrs
);
12870 /* This function exists in static storage.
12871 (This does not mean `static' in the C sense!) */
12872 TREE_STATIC (decl1
) = 1;
12874 /* We must call push_template_decl after current_class_type is set
12875 up. (If we are processing inline definitions after exiting a
12876 class scope, current_class_type will be NULL_TREE until set above
12877 by push_nested_class.) */
12878 if (processing_template_decl
)
12879 decl1
= push_template_decl (decl1
);
12881 /* We are now in the scope of the function being defined. */
12882 current_function_decl
= decl1
;
12884 /* Save the parm names or decls from this function's declarator
12885 where store_parm_decls will find them. */
12886 current_function_parms
= last_function_parms
;
12887 current_function_parm_tags
= last_function_parm_tags
;
12889 /* Make sure the parameter and return types are reasonable. When
12890 you declare a function, these types can be incomplete, but they
12891 must be complete when you define the function. */
12892 if (! processing_template_decl
)
12893 check_function_type (decl1
);
12895 /* Build the return declaration for the function. */
12896 restype
= TREE_TYPE (fntype
);
12897 if (!processing_template_decl
)
12899 if (!DECL_RESULT (decl1
))
12901 DECL_RESULT (decl1
)
12902 = build_decl (RESULT_DECL
, 0, TYPE_MAIN_VARIANT (restype
));
12903 c_apply_type_quals_to_decl (CP_TYPE_QUALS (restype
),
12904 DECL_RESULT (decl1
));
12908 /* Just use `void'. Nobody will ever look at this anyhow. */
12909 DECL_RESULT (decl1
) = build_decl (RESULT_DECL
, 0, void_type_node
);
12911 /* Initialize RTL machinery. We cannot do this until
12912 CURRENT_FUNCTION_DECL and DECL_RESULT are set up. We do this
12913 even when processing a template; this is how we get
12914 CURRENT_FUNCTION set up, and our per-function variables
12916 bl
= current_binding_level
;
12917 init_function_start (decl1
, input_filename
, lineno
);
12918 current_binding_level
= bl
;
12919 expanding_p
= (flags
& SF_EXPAND
) != 0;
12921 /* Even though we're inside a function body, we still don't want to
12922 call expand_expr to calculate the size of a variable-sized array.
12923 We haven't necessarily assigned RTL to all variables yet, so it's
12924 not safe to try to expand expressions involving them. */
12925 immediate_size_expand
= 0;
12926 current_function
->x_dont_save_pending_sizes_p
= 1;
12928 /* If we're building a statement-tree, start the tree now. */
12929 if (processing_template_decl
|| !expanding_p
)
12930 begin_stmt_tree (&DECL_SAVED_TREE (decl1
));
12932 /* Let the user know we're compiling this function. */
12933 if (processing_template_decl
|| !building_stmt_tree ())
12934 announce_function (decl1
);
12936 /* Record the decl so that the function name is defined.
12937 If we already have a decl for this name, and it is a FUNCTION_DECL,
12938 use the old decl. */
12939 if (!processing_template_decl
&& !(flags
& SF_PRE_PARSED
))
12941 /* A specialization is not used to guide overload resolution. */
12942 if ((flag_guiding_decls
12943 || !DECL_TEMPLATE_SPECIALIZATION (decl1
))
12944 && ! DECL_FUNCTION_MEMBER_P (decl1
))
12945 decl1
= pushdecl (decl1
);
12948 /* We need to set the DECL_CONTEXT. */
12949 if (!DECL_CONTEXT (decl1
) && DECL_TEMPLATE_INFO (decl1
))
12950 DECL_CONTEXT (decl1
) = DECL_CONTEXT (DECL_TI_TEMPLATE (decl1
));
12951 /* And make sure we have enough default args. */
12952 check_default_args (decl1
);
12954 DECL_MAIN_VARIANT (decl1
) = decl1
;
12955 fntype
= TREE_TYPE (decl1
);
12958 /* Reset these in case the call to pushdecl changed them. */
12959 current_function_decl
= decl1
;
12960 current_function
->decl
= decl1
;
12962 /* Initialize the per-function data. */
12963 if (!DECL_PENDING_INLINE_P (decl1
) && DECL_SAVED_FUNCTION_DATA (decl1
))
12965 /* If we already parsed this function, and we're just expanding it
12966 now, restore saved state. */
12967 struct binding_level
*bl
= current_binding_level
;
12968 *cp_function_chain
= *DECL_SAVED_FUNCTION_DATA (decl1
);
12969 current_binding_level
= bl
;
12971 /* This function is being processed in whole-function mode; we
12972 already did semantic analysis. */
12973 current_function
->x_whole_function_mode_p
= 1;
12975 /* If we decided that we didn't want to inline this function,
12976 make sure the back-end knows that. */
12977 if (!current_function_cannot_inline
)
12978 current_function_cannot_inline
= cp_function_chain
->cannot_inline
;
12980 /* We don't need the saved data anymore. */
12981 free (DECL_SAVED_FUNCTION_DATA (decl1
));
12982 DECL_SAVED_FUNCTION_DATA (decl1
) = NULL
;
12984 else if (ctype
&& !doing_friend
&& !DECL_STATIC_FUNCTION_P (decl1
))
12986 /* We know that this was set up by `grokclassfn'. We do not
12987 wait until `store_parm_decls', since evil parse errors may
12988 never get us to that point. Here we keep the consistency
12989 between `current_class_type' and `current_class_ptr'. */
12990 tree t
= DECL_ARGUMENTS (decl1
);
12992 my_friendly_assert (t
!= NULL_TREE
&& TREE_CODE (t
) == PARM_DECL
,
12994 my_friendly_assert (TREE_CODE (TREE_TYPE (t
)) == POINTER_TYPE
,
12997 cp_function_chain
->x_current_class_ref
12998 = build_indirect_ref (t
, NULL_PTR
);
12999 cp_function_chain
->x_current_class_ptr
= t
;
13001 /* Constructors and destructors need to know whether they're "in
13002 charge" of initializing virtual base classes. */
13003 if (DECL_DESTRUCTOR_P (decl1
))
13004 current_in_charge_parm
= TREE_CHAIN (t
);
13005 else if (DECL_CONSTRUCTOR_P (decl1
)
13007 && DECL_ARTIFICIAL (TREE_CHAIN (t
))
13008 && (DECL_NAME (TREE_CHAIN (t
))
13009 == in_charge_identifier
))
13010 current_in_charge_parm
= TREE_CHAIN (t
);
13013 if (DECL_INTERFACE_KNOWN (decl1
))
13015 tree ctx
= hack_decl_function_context (decl1
);
13017 if (DECL_NOT_REALLY_EXTERN (decl1
))
13018 DECL_EXTERNAL (decl1
) = 0;
13020 if (ctx
!= NULL_TREE
&& DECL_THIS_INLINE (ctx
)
13021 && TREE_PUBLIC (ctx
))
13022 /* This is a function in a local class in an extern inline
13024 comdat_linkage (decl1
);
13026 /* If this function belongs to an interface, it is public.
13027 If it belongs to someone else's interface, it is also external.
13028 This only affects inlines and template instantiations. */
13029 else if (interface_unknown
== 0
13030 && (! DECL_TEMPLATE_INSTANTIATION (decl1
)
13031 || flag_alt_external_templates
))
13033 if (DECL_THIS_INLINE (decl1
) || DECL_TEMPLATE_INSTANTIATION (decl1
)
13034 || processing_template_decl
)
13036 DECL_EXTERNAL (decl1
)
13038 || (DECL_THIS_INLINE (decl1
) && ! flag_implement_inlines
13039 && !DECL_VINDEX (decl1
)));
13041 /* For WIN32 we also want to put these in linkonce sections. */
13042 maybe_make_one_only (decl1
);
13045 DECL_EXTERNAL (decl1
) = 0;
13046 DECL_NOT_REALLY_EXTERN (decl1
) = 0;
13047 DECL_INTERFACE_KNOWN (decl1
) = 1;
13049 else if (interface_unknown
&& interface_only
13050 && (! DECL_TEMPLATE_INSTANTIATION (decl1
)
13051 || flag_alt_external_templates
))
13053 /* If MULTIPLE_SYMBOL_SPACES is defined and we saw a #pragma
13054 interface, we will have interface_only set but not
13055 interface_known. In that case, we don't want to use the normal
13056 heuristics because someone will supply a #pragma implementation
13057 elsewhere, and deducing it here would produce a conflict. */
13058 comdat_linkage (decl1
);
13059 DECL_EXTERNAL (decl1
) = 0;
13060 DECL_INTERFACE_KNOWN (decl1
) = 1;
13061 DECL_DEFER_OUTPUT (decl1
) = 1;
13065 /* This is a definition, not a reference.
13066 So clear DECL_EXTERNAL. */
13067 DECL_EXTERNAL (decl1
) = 0;
13069 if ((DECL_THIS_INLINE (decl1
) || DECL_TEMPLATE_INSTANTIATION (decl1
))
13070 && ! DECL_INTERFACE_KNOWN (decl1
)
13071 /* Don't try to defer nested functions for now. */
13072 && ! hack_decl_function_context (decl1
))
13073 DECL_DEFER_OUTPUT (decl1
) = 1;
13075 DECL_INTERFACE_KNOWN (decl1
) = 1;
13078 if (doing_semantic_analysis_p ())
13081 current_binding_level
->parm_flag
= 1;
13085 cplus_decl_attributes (decl1
, NULL_TREE
, attrs
);
13087 if (!building_stmt_tree ())
13089 GNU_xref_function (decl1
, current_function_parms
);
13090 make_function_rtl (decl1
);
13093 /* Promote the value to int before returning it. */
13094 if (C_PROMOTING_INTEGER_TYPE_P (restype
))
13095 restype
= type_promotes_to (restype
);
13097 /* If this fcn was already referenced via a block-scope `extern' decl
13098 (or an implicit decl), propagate certain information about the usage. */
13099 if (TREE_ADDRESSABLE (DECL_ASSEMBLER_NAME (decl1
)))
13100 TREE_ADDRESSABLE (decl1
) = 1;
13102 if (DECL_RESULT (decl1
) == NULL_TREE
)
13104 DECL_RESULT (decl1
)
13105 = build_decl (RESULT_DECL
, 0, TYPE_MAIN_VARIANT (restype
));
13106 TREE_READONLY (DECL_RESULT (decl1
)) = CP_TYPE_CONST_P (restype
);
13107 TREE_THIS_VOLATILE (DECL_RESULT (decl1
)) = CP_TYPE_VOLATILE_P (restype
);
13110 /* Allocate further tree nodes temporarily during compilation
13111 of this function only. Tiemann moved up here from bottom of fn. */
13112 /* If this is a nested function, then we must continue to allocate RTL
13113 on the permanent obstack in case we need to inline it later. */
13114 if (! hack_decl_function_context (decl1
))
13115 temporary_allocation ();
13117 /* Make sure that we always have a momntary obstack while we're in a
13123 if (DESTRUCTOR_NAME_P (DECL_ASSEMBLER_NAME (decl1
))
13124 && DECL_LANGUAGE (decl1
) == lang_cplusplus
)
13125 dtor_label
= build_decl (LABEL_DECL
, NULL_TREE
, NULL_TREE
);
13126 else if (DECL_CONSTRUCTOR_P (decl1
))
13127 ctor_label
= build_decl (LABEL_DECL
, NULL_TREE
, NULL_TREE
);
13132 /* Called after store_parm_decls for a function-try-block. We need to update
13133 last_parm_cleanup_insn so that the base initializers for a constructor
13134 are run within this block, not before it. */
13137 expand_start_early_try_stmts ()
13139 expand_start_try_stmts ();
13140 last_parm_cleanup_insn
= get_last_insn ();
13143 /* Store the parameter declarations into the current function declaration.
13144 This is called after parsing the parameter declarations, before
13145 digesting the body of the function.
13147 Also install to binding contour return value identifier, if any. */
13150 store_parm_decls ()
13152 register tree fndecl
= current_function_decl
;
13153 register tree parm
;
13154 int parms_have_cleanups
= 0;
13155 tree cleanups
= NULL_TREE
;
13157 /* This is a list of types declared among parms in a prototype. */
13158 tree parmtags
= current_function_parm_tags
;
13160 /* This is a chain of any other decls that came in among the parm
13161 declarations. If a parm is declared with enum {foo, bar} x;
13162 then CONST_DECLs for foo and bar are put here. */
13163 tree nonparms
= NULL_TREE
;
13165 /* Create a binding level for the parms. */
13166 if (!building_stmt_tree ())
13167 expand_start_bindings (2);
13169 if (current_function_parms
)
13171 /* This case is when the function was defined with an ANSI prototype.
13172 The parms already have decls, so we need not do anything here
13173 except record them as in effect
13174 and complain if any redundant old-style parm decls were written. */
13176 tree specparms
= current_function_parms
;
13179 if (doing_semantic_analysis_p ())
13181 /* Must clear this because it might contain TYPE_DECLs declared
13183 storedecls (NULL_TREE
);
13185 /* If we're doing semantic analysis, then we'll call pushdecl
13186 for each of these. We must do them in reverse order so that
13187 they end in the correct forward order. */
13188 specparms
= nreverse (specparms
);
13191 for (parm
= specparms
; parm
; parm
= next
)
13193 next
= TREE_CHAIN (parm
);
13194 if (TREE_CODE (parm
) == PARM_DECL
)
13198 if (doing_semantic_analysis_p ())
13200 if (DECL_NAME (parm
) == NULL_TREE
13201 || TREE_CODE (TREE_TYPE (parm
)) != VOID_TYPE
)
13204 cp_error ("parameter `%D' declared void", parm
);
13207 if (! building_stmt_tree ()
13208 && (cleanup
= maybe_build_cleanup (parm
), cleanup
))
13210 expand_decl (parm
);
13211 parms_have_cleanups
= 1;
13213 /* Keep track of the cleanups. */
13214 cleanups
= tree_cons (parm
, cleanup
, cleanups
);
13219 /* If we find an enum constant or a type tag,
13220 put it aside for the moment. */
13221 TREE_CHAIN (parm
) = NULL_TREE
;
13222 nonparms
= chainon (nonparms
, parm
);
13226 if (doing_semantic_analysis_p ())
13228 /* Get the decls in their original chain order
13229 and record in the function. This is all and only the
13230 PARM_DECLs that were pushed into scope by the loop above. */
13231 DECL_ARGUMENTS (fndecl
) = getdecls ();
13232 storetags (chainon (parmtags
, gettags ()));
13234 /* We built up the cleanups in reversed order. */
13235 cleanups
= nreverse (cleanups
);
13239 DECL_ARGUMENTS (fndecl
) = NULL_TREE
;
13241 /* Now store the final chain of decls for the arguments
13242 as the decl-chain of the current lexical scope.
13243 Put the enumerators in as well, at the front so that
13244 DECL_ARGUMENTS is not modified. */
13245 if (doing_semantic_analysis_p ())
13246 storedecls (chainon (nonparms
, DECL_ARGUMENTS (fndecl
)));
13248 /* Initialize the RTL code for the function. */
13249 DECL_SAVED_INSNS (fndecl
) = 0;
13250 if (! building_stmt_tree ())
13251 expand_function_start (fndecl
, parms_have_cleanups
);
13253 current_function_parms_stored
= 1;
13255 /* If this function is `main', emit a call to `__main'
13256 to run global initializers, etc. */
13257 if (DECL_MAIN_P (fndecl
) && !building_stmt_tree ())
13258 expand_main_function ();
13260 /* Now that we have initialized the parms, we can start their
13261 cleanups. We cannot do this before, since expand_decl_cleanup
13262 should not be called before the parm can be used. */
13263 if (cleanups
&& !building_stmt_tree ())
13266 if (! expand_decl_cleanup (TREE_PURPOSE (cleanups
),
13267 TREE_VALUE (cleanups
)))
13268 cp_error ("parser lost in parsing declaration of `%D'",
13269 TREE_PURPOSE (cleanups
));
13271 cleanups
= TREE_CHAIN (cleanups
);
13274 /* Create a binding contour which can be used to catch
13275 cleanup-generated temporaries. Also, if the return value needs or
13276 has initialization, deal with that now. */
13277 if (parms_have_cleanups
)
13280 if (!building_stmt_tree ())
13281 expand_start_bindings (2);
13284 /* Do the starting of the exception specifications, if we have any. */
13285 if (flag_exceptions
&& !processing_template_decl
13286 && building_stmt_tree ()
13287 && TYPE_RAISES_EXCEPTIONS (TREE_TYPE (current_function_decl
)))
13288 current_eh_spec_try_block
= expand_start_eh_spec ();
13290 last_parm_cleanup_insn
= get_last_insn ();
13291 last_dtor_insn
= get_last_insn ();
13294 /* Bind a name and initialization to the return value of
13295 the current function. */
13298 store_return_init (decl
)
13301 /* If this named return value comes in a register, put it in a
13302 pseudo-register. */
13303 if (DECL_REGISTER (decl
))
13305 original_result_rtx
= DECL_RTL (decl
);
13306 DECL_RTL (decl
) = gen_reg_rtx (DECL_MODE (decl
));
13311 /* We have finished doing semantic analysis on DECL, but have not yet
13312 generated RTL for its body. Save away our current state, so that
13313 when we want to generate RTL later we know what to do. */
13316 save_function_data (decl
)
13319 struct language_function
*f
;
13321 /* Save the language-specific per-function data so that we can
13322 get it back when we really expand this function. */
13323 my_friendly_assert (!DECL_PENDING_INLINE_P (decl
),
13327 f
= ((struct language_function
*)
13328 xmalloc (sizeof (struct language_function
)));
13329 bcopy ((char *) cp_function_chain
, (char *) f
,
13330 sizeof (struct language_function
));
13331 DECL_SAVED_FUNCTION_DATA (decl
) = f
;
13333 /* Clear out the bits we don't need. */
13334 f
->x_base_init_list
= NULL_TREE
;
13335 f
->x_member_init_list
= NULL_TREE
;
13336 f
->x_stmt_tree
.x_last_stmt
= NULL_TREE
;
13337 f
->x_stmt_tree
.x_last_expr_type
= NULL_TREE
;
13338 f
->x_last_dtor_insn
= NULL_RTX
;
13339 f
->x_last_parm_cleanup_insn
= NULL_RTX
;
13340 f
->x_result_rtx
= NULL_RTX
;
13341 f
->x_named_label_uses
= NULL
;
13342 f
->bindings
= NULL
;
13344 /* When we get back here again, we will be expanding. */
13345 f
->x_expanding_p
= 1;
13347 /* If we've already decided that we cannot inline this function, we
13348 must remember that fact when we actually go to expand the
13350 f
->cannot_inline
= current_function_cannot_inline
;
13353 /* At the end of every constructor we generate to code to return
13354 `this'. Do that now. */
13357 finish_constructor_body ()
13359 /* Any return from a constructor will end up here. */
13360 add_tree (build_min_nt (LABEL_STMT
, ctor_label
));
13362 /* Clear CTOR_LABEL so that finish_return_stmt knows to really
13363 generate the return, rather than a goto to CTOR_LABEL. */
13364 ctor_label
= NULL_TREE
;
13365 /* In check_return_expr we translate an empty return from a
13366 constructor to a return of `this'. */
13367 finish_return_stmt (NULL_TREE
);
13370 /* At the end of every destructor we generate code to restore virtual
13371 function tables to the values desired by base classes and to call
13372 to base class destructors. Do that now. */
13375 finish_destructor_body ()
13377 tree compound_stmt
;
13382 /* Create a block to contain all the extra code. */
13383 compound_stmt
= begin_compound_stmt (/*has_no_scope=*/0);
13385 /* Any return from a destructor will end up here. */
13386 add_tree (build_min_nt (LABEL_STMT
, dtor_label
));
13388 /* Generate the code to call destructor on base class. If this
13389 destructor belongs to a class with virtual functions, then set
13390 the virtual function table pointer to represent the type of our
13393 /* This side-effect makes call to `build_delete' generate the code
13394 we have to have at the end of this destructor. `build_delete'
13395 will set the flag again. */
13396 TYPE_HAS_DESTRUCTOR (current_class_type
) = 0;
13398 /* These are two cases where we cannot delegate deletion. */
13399 if (TYPE_USES_VIRTUAL_BASECLASSES (current_class_type
)
13400 || TYPE_GETS_REG_DELETE (current_class_type
))
13401 in_charge
= integer_zero_node
;
13403 in_charge
= current_in_charge_parm
;
13405 exprstmt
= build_delete (current_class_type
,
13408 LOOKUP_NONVIRTUAL
|LOOKUP_DESTRUCTOR
|LOOKUP_NORMAL
,
13411 if (exprstmt
!= error_mark_node
13412 && (TREE_CODE (exprstmt
) != NOP_EXPR
13413 || TREE_OPERAND (exprstmt
, 0) != integer_zero_node
13414 || TYPE_USES_VIRTUAL_BASECLASSES (current_class_type
)))
13416 if (exprstmt
!= void_zero_node
)
13417 /* Don't call `expand_expr_stmt' if we're not going to do
13418 anything, since -Wall will give a diagnostic. */
13419 finish_expr_stmt (exprstmt
);
13421 /* Run destructors for all virtual baseclasses. */
13422 if (TYPE_USES_VIRTUAL_BASECLASSES (current_class_type
))
13424 tree vbases
= nreverse (copy_list (CLASSTYPE_VBASECLASSES (current_class_type
)));
13425 tree if_stmt
= begin_if_stmt ();
13426 finish_if_stmt_cond (build (BIT_AND_EXPR
, integer_type_node
,
13427 current_in_charge_parm
,
13433 if (TYPE_NEEDS_DESTRUCTOR (BINFO_TYPE (vbases
)))
13435 tree vb
= get_vbase
13436 (BINFO_TYPE (vbases
),
13437 TYPE_BINFO (current_class_type
));
13439 (build_scoped_method_call
13440 (current_class_ref
, vb
, dtor_identifier
,
13441 build_expr_list (NULL_TREE
, integer_zero_node
)));
13443 vbases
= TREE_CHAIN (vbases
);
13446 finish_then_clause (if_stmt
);
13451 virtual_size
= c_sizeof (current_class_type
);
13453 /* At the end, call delete if that's what's requested. */
13455 /* FDIS sez: At the point of definition of a virtual destructor
13456 (including an implicit definition), non-placement operator delete
13457 shall be looked up in the scope of the destructor's class and if
13458 found shall be accessible and unambiguous.
13460 This is somewhat unclear, but I take it to mean that if the class
13461 only defines placement deletes we don't do anything here. So we
13462 pass LOOKUP_SPECULATIVELY; delete_sanity will complain for us if
13463 they ever try to delete one of these. */
13464 if (TYPE_GETS_REG_DELETE (current_class_type
)
13465 || TYPE_USES_VIRTUAL_BASECLASSES (current_class_type
))
13469 exprstmt
= build_op_delete_call
13470 (DELETE_EXPR
, current_class_ptr
, virtual_size
,
13471 LOOKUP_NORMAL
| LOOKUP_SPECULATIVELY
, NULL_TREE
);
13473 if_stmt
= begin_if_stmt ();
13474 finish_if_stmt_cond (build (BIT_AND_EXPR
, integer_type_node
,
13475 current_in_charge_parm
,
13478 finish_expr_stmt (exprstmt
);
13479 finish_then_clause (if_stmt
);
13483 /* Close the block we started above. */
13484 finish_compound_stmt (/*has_no_scope=*/0, compound_stmt
);
13487 /* Finish up a function declaration and compile that function
13488 all the way to assembler language output. The free the storage
13489 for the function definition.
13491 This is called after parsing the body of the function definition.
13492 LINENO is the current line number.
13494 FLAGS is a bitwise or of the following values:
13496 An extra call to poplevel (and expand_end_bindings) must be
13497 made to take care of the binding contour for the base
13498 initializers. This is only relevant for constructors.
13500 We just finished processing the body of an in-class inline
13501 function definition. (This processing will have taken place
13502 after the class definition is complete.) */
13505 finish_function (lineno
, flags
)
13509 register tree fndecl
= current_function_decl
;
13510 tree fntype
, ctype
= NULL_TREE
;
13511 /* Label to use if this function is supposed to return a value. */
13512 tree no_return_label
= NULL_TREE
;
13513 int call_poplevel
= (flags
& 1) != 0;
13514 int inclass_inline
= (flags
& 2) != 0;
13518 /* When we get some parse errors, we can end up without a
13519 current_function_decl, so cope. */
13520 if (fndecl
== NULL_TREE
)
13521 return error_mark_node
;
13523 nested
= function_depth
> 1;
13524 fntype
= TREE_TYPE (fndecl
);
13526 /* TREE_READONLY (fndecl) = 1;
13527 This caused &foo to be of type ptr-to-const-function
13528 which then got a warning when stored in a ptr-to-function variable. */
13530 /* This happens on strange parse errors. */
13531 if (! current_function_parms_stored
)
13534 store_parm_decls ();
13537 if (building_stmt_tree ())
13539 if (DECL_CONSTRUCTOR_P (fndecl
))
13541 finish_constructor_body ();
13545 else if (DECL_DESTRUCTOR_P (fndecl
) && !processing_template_decl
)
13546 finish_destructor_body ();
13547 else if (DECL_MAIN_P (fndecl
))
13549 /* Make it so that `main' always returns 0 by default. */
13551 finish_return_stmt (integer_one_node
);
13553 finish_return_stmt (integer_zero_node
);
13557 /* Finish dealing with exception specifiers. */
13558 if (flag_exceptions
&& !processing_template_decl
13559 && TYPE_RAISES_EXCEPTIONS (TREE_TYPE (current_function_decl
)))
13560 expand_end_eh_spec (TYPE_RAISES_EXCEPTIONS
13561 (TREE_TYPE (current_function_decl
)),
13562 current_eh_spec_try_block
);
13566 if (write_symbols
!= NO_DEBUG
/*&& TREE_CODE (fntype) != METHOD_TYPE*/)
13568 tree ttype
= target_type (fntype
);
13571 if (IS_AGGR_TYPE (ttype
))
13572 /* Let debugger know it should output info for this type. */
13573 note_debug_info_needed (ttype
);
13575 for (parmdecl
= DECL_ARGUMENTS (fndecl
); parmdecl
; parmdecl
= TREE_CHAIN (parmdecl
))
13577 ttype
= target_type (TREE_TYPE (parmdecl
));
13578 if (IS_AGGR_TYPE (ttype
))
13579 /* Let debugger know it should output info for this type. */
13580 note_debug_info_needed (ttype
);
13584 /* Clean house because we will need to reorder insns here. */
13585 do_pending_stack_adjust ();
13589 else if (DECL_CONSTRUCTOR_P (fndecl
))
13591 /* All subobjects have been fully constructed at this point. */
13592 end_protect_partials ();
13597 else if (return_label
!= NULL_RTX
13598 && flag_this_is_variable
<= 0
13599 && current_function_return_value
== NULL_TREE
13600 && ! DECL_NAME (DECL_RESULT (current_function_decl
)))
13601 no_return_label
= build_decl (LABEL_DECL
, NULL_TREE
, NULL_TREE
);
13603 if (flag_exceptions
)
13604 expand_exception_blocks ();
13606 /* If this function is supposed to return a value, ensure that
13607 we do not fall into the cleanups by mistake. The end of our
13608 function will look like this:
13610 user code (may have return stmt somewhere)
13611 goto no_return_label
13616 NOTE_INSN_FUNCTION_END
13620 If the user omits a return stmt in the USER CODE section, we
13621 will have a control path which reaches NOTE_INSN_FUNCTION_END.
13622 Otherwise, we won't. */
13623 if (no_return_label
)
13625 DECL_CONTEXT (no_return_label
) = fndecl
;
13626 DECL_INITIAL (no_return_label
) = error_mark_node
;
13627 DECL_SOURCE_FILE (no_return_label
) = input_filename
;
13628 DECL_SOURCE_LINE (no_return_label
) = lineno
;
13629 expand_goto (no_return_label
);
13634 /* Remove the binding contour which is used
13635 to catch cleanup-generated temporaries. */
13636 expand_end_bindings (0, 0, 0);
13637 poplevel (0, 0, 0);
13639 /* Emit label at beginning of cleanup code for parameters. */
13640 emit_label (cleanup_label
);
13643 /* Get return value into register if that's where it's supposed
13645 if (original_result_rtx
)
13646 fixup_result_decl (DECL_RESULT (fndecl
), original_result_rtx
);
13648 /* Finish building code that will trigger warnings if users forget
13649 to make their functions return values. */
13650 if (no_return_label
|| cleanup_label
)
13651 emit_jump (return_label
);
13652 if (no_return_label
)
13654 /* We don't need to call `expand_*_return' here because we
13655 don't need any cleanups here--this path of code is only
13656 for error checking purposes. */
13657 expand_label (no_return_label
);
13660 /* We hard-wired immediate_size_expand to zero in
13661 start_function. Expand_function_end will decrement this
13662 variable. So, we set the variable to one here, so that after
13663 the decrement it will remain zero. */
13664 immediate_size_expand
= 1;
13666 /* Generate rtl for function exit. */
13667 expand_function_end (input_filename
, lineno
, 1);
13670 /* We have to save this value here in case
13671 maybe_end_member_template_processing decides to pop all the
13672 template parameters. */
13673 expand_p
= !building_stmt_tree ();
13675 /* If we're saving up tree structure, tie off the function now. */
13677 finish_stmt_tree (&DECL_SAVED_TREE (fndecl
));
13679 /* This must come after expand_function_end because cleanups might
13680 have declarations (from inline functions) that need to go into
13681 this function's blocks. */
13682 if (doing_semantic_analysis_p ())
13684 if (current_binding_level
->parm_flag
!= 1)
13685 my_friendly_abort (122);
13686 poplevel (1, 0, 1);
13689 /* Remember that we were in class scope. */
13690 if (current_class_name
)
13691 ctype
= current_class_type
;
13693 /* Must mark the RESULT_DECL as being in this function. */
13694 DECL_CONTEXT (DECL_RESULT (fndecl
)) = fndecl
;
13696 /* Set the BLOCK_SUPERCONTEXT of the outermost function scope to point
13697 to the FUNCTION_DECL node itself. */
13698 BLOCK_SUPERCONTEXT (DECL_INITIAL (fndecl
)) = fndecl
;
13700 /* Undo the call to push_momentary in start_function. */
13703 /* Save away current state, if appropriate. */
13704 if (!expanding_p
&& !processing_template_decl
)
13705 save_function_data (fndecl
);
13711 int saved_flag_keep_inline_functions
=
13712 flag_keep_inline_functions
;
13714 /* So we can tell if jump_optimize sets it to 1. */
13717 if (DECL_CONTEXT (fndecl
) != NULL_TREE
13718 && hack_decl_function_context (fndecl
))
13719 /* Trick rest_of_compilation into not deferring output of this
13720 function, even if it is inline, since the rtl_obstack for
13721 this function is the function_obstack of the enclosing
13722 function and will be deallocated when the enclosing
13723 function is gone. See save_tree_status. */
13724 flag_keep_inline_functions
= 1;
13726 /* Before we call rest_of_compilation (which will pop the
13727 CURRENT_FUNCTION), we must save these values. */
13728 returns_null
= current_function_returns_null
;
13729 returns_value
= current_function_returns_value
;
13731 /* If this is a nested function (like a template instantiation
13732 that we're compiling in the midst of compiling something
13733 else), push a new GC context. That will keep local variables
13734 on the stack from being collected while we're doing the
13735 compilation of this function. */
13736 if (function_depth
> 1)
13737 ggc_push_context ();
13739 /* Run the optimizers and output the assembler code for this
13741 if (DECL_ARTIFICIAL (fndecl
))
13743 /* Do we really *want* to inline this synthesized method? */
13745 int save_fif
= flag_inline_functions
;
13746 flag_inline_functions
= 1;
13748 /* Turn off DECL_INLINE for the moment so function_cannot_inline_p
13749 will check our size. */
13750 DECL_INLINE (fndecl
) = 0;
13752 rest_of_compilation (fndecl
);
13753 flag_inline_functions
= save_fif
;
13756 rest_of_compilation (fndecl
);
13758 /* Undo the call to ggc_push_context above. */
13759 if (function_depth
> 1)
13760 ggc_pop_context ();
13762 flag_keep_inline_functions
= saved_flag_keep_inline_functions
;
13764 if (DECL_SAVED_INSNS (fndecl
) && ! TREE_ASM_WRITTEN (fndecl
))
13766 /* Set DECL_EXTERNAL so that assemble_external will be called as
13767 necessary. We'll clear it again in finish_file. */
13768 if (! DECL_EXTERNAL (fndecl
))
13769 DECL_NOT_REALLY_EXTERN (fndecl
) = 1;
13770 DECL_EXTERNAL (fndecl
) = 1;
13771 mark_inline_for_output (fndecl
);
13774 if (ctype
&& TREE_ASM_WRITTEN (fndecl
))
13775 note_debug_info_needed (ctype
);
13777 returns_null
|= can_reach_end
;
13779 /* Since we don't normally go through c_expand_return for constructors,
13780 this normally gets the wrong value.
13781 Also, named return values have their return codes emitted after
13782 NOTE_INSN_FUNCTION_END, confusing jump.c. */
13783 if (DECL_CONSTRUCTOR_P (fndecl
)
13784 || DECL_NAME (DECL_RESULT (fndecl
)) != NULL_TREE
)
13787 if (TREE_THIS_VOLATILE (fndecl
) && returns_null
)
13788 cp_warning ("`noreturn' function `%D' does return", fndecl
);
13789 else if ((warn_return_type
|| pedantic
)
13791 && TREE_CODE (TREE_TYPE (fntype
)) != VOID_TYPE
)
13793 /* If this function returns non-void and control can drop through,
13795 cp_warning ("control reaches end of non-void function `%D'", fndecl
);
13797 /* With just -W, complain only if function returns both with
13798 and without a value. */
13799 else if (extra_warnings
&& returns_value
&& returns_null
)
13800 warning ("this function may return with or without a value");
13804 /* Since we never call rest_of_compilation, we never clear
13805 CURRENT_FUNCTION. Do so explicitly. */
13806 free_after_compilation (current_function
);
13807 current_function
= NULL
;
13810 /* If this is a in-class inline definition, we may have to pop the
13811 bindings for the template parameters that we added in
13812 maybe_begin_member_template_processing when start_function was
13814 if (inclass_inline
)
13815 maybe_end_member_template_processing ();
13817 /* Leave the scope of the class. */
13819 pop_nested_class ();
13823 /* Free all the tree nodes making up this function. */
13824 /* Switch back to allocating nodes permanently
13825 until we start another function. */
13827 permanent_allocation (1);
13829 if (!DECL_SAVED_INSNS (fndecl
) && !DECL_SAVED_FUNCTION_DATA (fndecl
))
13833 /* Stop pointing to the local nodes about to be freed. */
13834 /* But DECL_INITIAL must remain nonzero so we know this
13835 was an actual function definition. */
13836 DECL_INITIAL (fndecl
) = error_mark_node
;
13837 for (t
= DECL_ARGUMENTS (fndecl
); t
; t
= TREE_CHAIN (t
))
13838 DECL_RTL (t
) = DECL_INCOMING_RTL (t
) = NULL_RTX
;
13841 if (DECL_STATIC_CONSTRUCTOR (fndecl
))
13842 static_ctors
= tree_cons (NULL_TREE
, fndecl
, static_ctors
);
13843 if (DECL_STATIC_DESTRUCTOR (fndecl
))
13844 static_dtors
= tree_cons (NULL_TREE
, fndecl
, static_dtors
);
13849 /* Let the error reporting routines know that we're outside a
13850 function. For a nested function, this value is used in
13851 pop_cp_function_context and then reset via pop_function_context. */
13852 current_function_decl
= NULL_TREE
;
13858 /* Create the FUNCTION_DECL for a function definition.
13859 DECLSPECS and DECLARATOR are the parts of the declaration;
13860 they describe the return type and the name of the function,
13861 but twisted together in a fashion that parallels the syntax of C.
13863 This function creates a binding context for the function body
13864 as well as setting up the FUNCTION_DECL in current_function_decl.
13866 Returns a FUNCTION_DECL on success.
13868 If the DECLARATOR is not suitable for a function (it defines a datum
13869 instead), we return 0, which tells yyparse to report a parse error.
13871 May return void_type_node indicating that this method is actually
13872 a friend. See grokfield for more details.
13874 Came here with a `.pushlevel' .
13876 DO NOT MAKE ANY CHANGES TO THIS CODE WITHOUT MAKING CORRESPONDING
13877 CHANGES TO CODE IN `grokfield'. */
13880 start_method (declspecs
, declarator
, attrlist
)
13881 tree declarator
, declspecs
, attrlist
;
13883 tree fndecl
= grokdeclarator (declarator
, declspecs
, MEMFUNCDEF
, 0,
13886 /* Something too ugly to handle. */
13887 if (fndecl
== NULL_TREE
)
13890 /* Pass friends other than inline friend functions back. */
13891 if (fndecl
== void_type_node
)
13894 if (TREE_CODE (fndecl
) != FUNCTION_DECL
)
13895 /* Not a function, tell parser to report parse error. */
13898 if (DECL_IN_AGGR_P (fndecl
))
13900 if (IDENTIFIER_ERROR_LOCUS (DECL_ASSEMBLER_NAME (fndecl
)) != current_class_type
)
13902 if (DECL_CONTEXT (fndecl
)
13903 && TREE_CODE( DECL_CONTEXT (fndecl
)) != NAMESPACE_DECL
)
13904 cp_error ("`%D' is already defined in class %s", fndecl
,
13905 TYPE_NAME_STRING (DECL_CONTEXT (fndecl
)));
13907 return void_type_node
;
13910 check_template_shadow (fndecl
);
13912 DECL_THIS_INLINE (fndecl
) = 1;
13914 if (flag_default_inline
)
13915 DECL_INLINE (fndecl
) = 1;
13917 /* We process method specializations in finish_struct_1. */
13918 if (processing_template_decl
&& !DECL_TEMPLATE_SPECIALIZATION (fndecl
))
13919 fndecl
= push_template_decl (fndecl
);
13921 /* We read in the parameters on the maybepermanent_obstack,
13922 but we won't be getting back to them until after we
13923 may have clobbered them. So the call to preserve_data
13924 will keep them safe. */
13927 if (! DECL_FRIEND_P (fndecl
))
13929 if (TREE_CHAIN (fndecl
))
13931 fndecl
= copy_node (fndecl
);
13932 TREE_CHAIN (fndecl
) = NULL_TREE
;
13935 if (DECL_CONSTRUCTOR_P (fndecl
))
13937 if (! grok_ctor_properties (current_class_type
, fndecl
))
13938 return void_type_node
;
13940 else if (IDENTIFIER_OPNAME_P (DECL_NAME (fndecl
)))
13941 grok_op_properties (fndecl
, DECL_VIRTUAL_P (fndecl
), 0);
13944 cp_finish_decl (fndecl
, NULL_TREE
, NULL_TREE
, 0, 0);
13946 /* Make a place for the parms */
13948 current_binding_level
->parm_flag
= 1;
13950 DECL_IN_AGGR_P (fndecl
) = 1;
13954 /* Go through the motions of finishing a function definition.
13955 We don't compile this method until after the whole class has
13958 FINISH_METHOD must return something that looks as though it
13959 came from GROKFIELD (since we are defining a method, after all).
13961 This is called after parsing the body of the function definition.
13962 STMTS is the chain of statements that makes up the function body.
13964 DECL is the ..._DECL that `start_method' provided. */
13967 finish_method (decl
)
13970 register tree fndecl
= decl
;
13973 register tree link
;
13975 if (decl
== void_type_node
)
13978 old_initial
= DECL_INITIAL (fndecl
);
13980 /* Undo the level for the parms (from start_method).
13981 This is like poplevel, but it causes nothing to be
13982 saved. Saving information here confuses symbol-table
13983 output routines. Besides, this information will
13984 be correctly output when this method is actually
13987 /* Clear out the meanings of the local variables of this level;
13988 also record in each decl which block it belongs to. */
13990 for (link
= current_binding_level
->names
; link
; link
= TREE_CHAIN (link
))
13992 if (DECL_NAME (link
) != NULL_TREE
)
13993 pop_binding (DECL_NAME (link
), link
);
13994 my_friendly_assert (TREE_CODE (link
) != FUNCTION_DECL
, 163);
13995 DECL_CONTEXT (link
) = NULL_TREE
;
13998 GNU_xref_end_scope ((HOST_WIDE_INT
) current_binding_level
,
13999 (HOST_WIDE_INT
) current_binding_level
->level_chain
,
14000 current_binding_level
->parm_flag
,
14001 current_binding_level
->keep
);
14003 poplevel (0, 0, 0);
14005 DECL_INITIAL (fndecl
) = old_initial
;
14007 /* We used to check if the context of FNDECL was different from
14008 current_class_type as another way to get inside here. This didn't work
14009 for String.cc in libg++. */
14010 if (DECL_FRIEND_P (fndecl
))
14012 CLASSTYPE_INLINE_FRIENDS (current_class_type
)
14013 = tree_cons (NULL_TREE
, fndecl
, CLASSTYPE_INLINE_FRIENDS (current_class_type
));
14014 decl
= void_type_node
;
14020 /* Called when a new struct TYPE is defined.
14021 If this structure or union completes the type of any previous
14022 variable declaration, lay it out and output its rtl. */
14025 hack_incomplete_structures (type
)
14030 if (current_binding_level
->incomplete
== NULL_TREE
)
14033 if (!type
) /* Don't do this for class templates. */
14036 for (list
= ¤t_binding_level
->incomplete
; *list
; )
14038 tree decl
= TREE_VALUE (*list
);
14039 if ((decl
&& TREE_TYPE (decl
) == type
)
14040 || (TREE_TYPE (decl
)
14041 && TREE_CODE (TREE_TYPE (decl
)) == ARRAY_TYPE
14042 && TREE_TYPE (TREE_TYPE (decl
)) == type
))
14044 int toplevel
= toplevel_bindings_p ();
14045 if (TREE_CODE (TREE_TYPE (decl
)) == ARRAY_TYPE
14046 && TREE_TYPE (TREE_TYPE (decl
)) == type
)
14047 layout_type (TREE_TYPE (decl
));
14048 layout_decl (decl
, 0);
14049 rest_of_decl_compilation (decl
, NULL_PTR
, toplevel
, 0);
14053 expand_decl (decl
);
14054 cleanup
= maybe_build_cleanup (decl
);
14055 expand_decl_init (decl
);
14056 if (! expand_decl_cleanup (decl
, cleanup
))
14057 cp_error ("parser lost in parsing declaration of `%D'",
14060 *list
= TREE_CHAIN (*list
);
14063 list
= &TREE_CHAIN (*list
);
14067 /* If DECL is of a type which needs a cleanup, build that cleanup here.
14068 See build_delete for information about AUTO_DELETE.
14070 Don't build these on the momentary obstack; they must live
14071 the life of the binding contour. */
14074 maybe_build_cleanup_1 (decl
, auto_delete
)
14075 tree decl
, auto_delete
;
14077 tree type
= TREE_TYPE (decl
);
14078 if (type
!= error_mark_node
&& TYPE_NEEDS_DESTRUCTOR (type
))
14080 int temp
= 0, flags
= LOOKUP_NORMAL
|LOOKUP_DESTRUCTOR
;
14083 if (TREE_CODE (decl
) != PARM_DECL
)
14084 temp
= suspend_momentary ();
14086 if (TREE_CODE (type
) == ARRAY_TYPE
)
14090 mark_addressable (decl
);
14091 rval
= build_unary_op (ADDR_EXPR
, decl
, 0);
14094 /* Optimize for space over speed here. */
14095 if (! TYPE_USES_VIRTUAL_BASECLASSES (type
)
14096 || flag_expensive_optimizations
)
14097 flags
|= LOOKUP_NONVIRTUAL
;
14099 rval
= build_delete (TREE_TYPE (rval
), rval
, auto_delete
, flags
, 0);
14101 if (TYPE_USES_VIRTUAL_BASECLASSES (type
)
14102 && ! TYPE_HAS_DESTRUCTOR (type
))
14103 rval
= build_compound_expr (tree_cons (NULL_TREE
, rval
,
14104 build_expr_list (NULL_TREE
, build_vbase_delete (type
, decl
))));
14106 if (TREE_CODE (decl
) != PARM_DECL
)
14107 resume_momentary (temp
);
14114 /* Build a TARGET_EXPR, initializing the DECL with the VALUE. */
14117 build_target_expr (decl
, value
)
14123 t
= build (TARGET_EXPR
, TREE_TYPE (decl
), decl
, value
,
14124 maybe_build_cleanup (decl
), NULL_TREE
);
14125 /* We always set TREE_SIDE_EFFECTS so that expand_expr does not
14126 ignore the TARGET_EXPR. If there really turn out to be no
14127 side-effects, then the optimizer should be able to get rid of
14128 whatever code is generated anyhow. */
14129 TREE_SIDE_EFFECTS (t
) = 1;
14134 /* If DECL is of a type which needs a cleanup, build that cleanup
14135 here. The cleanup does free the storage with a call to delete. */
14138 maybe_build_cleanup_and_delete (decl
)
14141 return maybe_build_cleanup_1 (decl
, integer_three_node
);
14144 /* If DECL is of a type which needs a cleanup, build that cleanup
14145 here. The cleanup does not free the storage with a call a delete. */
14148 maybe_build_cleanup (decl
)
14151 return maybe_build_cleanup_1 (decl
, integer_two_node
);
14154 /* Expand a C++ expression at the statement level.
14155 This is needed to ferret out nodes which have UNKNOWN_TYPE.
14156 The C++ type checker should get all of these out when
14157 expressions are combined with other, type-providing, expressions,
14158 leaving only orphan expressions, such as:
14160 &class::bar; / / takes its address, but does nothing with it. */
14163 cplus_expand_expr_stmt (exp
)
14166 if (stmts_are_full_exprs_p
)
14167 exp
= convert_to_void (exp
, "statement");
14170 /* We should do this eventually, but right now this causes regex.o from
14171 libg++ to miscompile, and tString to core dump. */
14172 exp
= build1 (CLEANUP_POINT_EXPR
, TREE_TYPE (exp
), exp
);
14175 /* If we don't do this, we end up down inside expand_expr
14176 trying to do TYPE_MODE on the ERROR_MARK, and really
14177 go outside the bounds of the type. */
14178 if (exp
!= error_mark_node
)
14179 expand_expr_stmt (break_out_cleanups (exp
));
14182 /* When a stmt has been parsed, this function is called. */
14187 /* Always assume this statement was not an expression statement. If
14188 it actually was an expression statement, its our callers
14189 responsibility to fix this up. */
14190 last_expr_type
= NULL_TREE
;
14193 /* Change a static member function definition into a FUNCTION_TYPE, instead
14194 of the METHOD_TYPE that we create when it's originally parsed.
14196 WARNING: DO NOT pass &TREE_TYPE (decl) to FN or &TYPE_ARG_TYPES
14197 (TREE_TYPE (decl)) to ARGTYPES, as doing so will corrupt the types of
14198 other decls. Either pass the addresses of local variables or NULL. */
14201 revert_static_member_fn (decl
, fn
, argtypes
)
14202 tree
*decl
, *fn
, *argtypes
;
14205 tree function
= fn
? *fn
: TREE_TYPE (*decl
);
14206 tree args
= argtypes
? *argtypes
: TYPE_ARG_TYPES (function
);
14208 if (CP_TYPE_QUALS (TREE_TYPE (TREE_VALUE (args
)))
14209 != TYPE_UNQUALIFIED
)
14210 cp_error ("static member function `%#D' declared with type qualifiers",
14213 args
= TREE_CHAIN (args
);
14214 tmp
= build_function_type (TREE_TYPE (function
), args
);
14215 tmp
= build_qualified_type (tmp
, CP_TYPE_QUALS (function
));
14216 tmp
= build_exception_variant (tmp
,
14217 TYPE_RAISES_EXCEPTIONS (function
));
14218 TREE_TYPE (*decl
) = tmp
;
14219 if (DECL_ARGUMENTS (*decl
))
14220 DECL_ARGUMENTS (*decl
) = TREE_CHAIN (DECL_ARGUMENTS (*decl
));
14221 DECL_STATIC_FUNCTION_P (*decl
) = 1;
14228 /* Initialize the variables used during compilation of a C++
14232 push_cp_function_context (f
)
14233 struct function
*f
;
14235 struct language_function
*p
14236 = ((struct language_function
*)
14237 xcalloc (1, sizeof (struct language_function
)));
14240 /* It takes an explicit call to expand_body to generate RTL for a
14244 /* Whenever we start a new function, we destroy temporaries in the
14246 stmts_are_full_exprs_p
= 1;
14249 /* Free the language-specific parts of F, now that we've finished
14250 compiling the function. */
14253 pop_cp_function_context (f
)
14254 struct function
*f
;
14256 free (f
->language
);
14260 /* Mark P for GC. */
14263 mark_lang_function (p
)
14264 struct language_function
*p
;
14269 ggc_mark_tree (p
->x_named_labels
);
14270 ggc_mark_tree (p
->x_ctor_label
);
14271 ggc_mark_tree (p
->x_dtor_label
);
14272 ggc_mark_tree (p
->x_base_init_list
);
14273 ggc_mark_tree (p
->x_member_init_list
);
14274 ggc_mark_tree (p
->x_current_class_ptr
);
14275 ggc_mark_tree (p
->x_current_class_ref
);
14276 ggc_mark_tree (p
->x_eh_spec_try_block
);
14277 ggc_mark_tree (p
->x_scope_stmt_stack
);
14279 ggc_mark_rtx (p
->x_last_dtor_insn
);
14280 ggc_mark_rtx (p
->x_last_parm_cleanup_insn
);
14281 ggc_mark_rtx (p
->x_result_rtx
);
14283 mark_stmt_tree (&p
->x_stmt_tree
);
14284 mark_binding_level (&p
->bindings
);
14287 /* Mark the language-specific data in F for GC. */
14290 mark_cp_function_context (f
)
14291 struct function
*f
;
14293 mark_lang_function (f
->language
);
14299 return function_depth
!= 0;
14304 lang_mark_false_label_stack (l
)
14305 struct label_node
*l
;
14307 /* C++ doesn't use false_label_stack. It better be NULL. */
14308 my_friendly_assert (l
== NULL
, 19990904);
14315 enum tree_code code
= TREE_CODE (t
);
14316 if (code
== IDENTIFIER_NODE
)
14318 struct lang_identifier
*li
= (struct lang_identifier
*) t
;
14319 struct lang_id2
*li2
= li
->x
;
14320 ggc_mark_tree (li
->namespace_bindings
);
14321 ggc_mark_tree (li
->bindings
);
14322 ggc_mark_tree (li
->class_value
);
14323 ggc_mark_tree (li
->class_template_info
);
14327 ggc_mark_tree (li2
->label_value
);
14328 ggc_mark_tree (li2
->implicit_decl
);
14329 ggc_mark_tree (li2
->error_locus
);
14332 else if (code
== CPLUS_BINDING
)
14334 if (BINDING_HAS_LEVEL_P (t
))
14335 mark_binding_level (&BINDING_LEVEL (t
));
14337 ggc_mark_tree (BINDING_SCOPE (t
));
14338 ggc_mark_tree (BINDING_VALUE (t
));
14340 else if (code
== OVERLOAD
)
14341 ggc_mark_tree (OVL_FUNCTION (t
));
14342 else if (code
== TEMPLATE_PARM_INDEX
)
14343 ggc_mark_tree (TEMPLATE_PARM_DECL (t
));
14344 else if (TREE_CODE_CLASS (code
) == 'd')
14346 struct lang_decl
*ld
= DECL_LANG_SPECIFIC (t
);
14351 if (!DECL_GLOBAL_CTOR_P (t
) && !DECL_GLOBAL_DTOR_P (t
))
14352 ggc_mark_tree (ld
->decl_flags
.u2
.access
);
14353 ggc_mark_tree (ld
->decl_flags
.context
);
14354 if (TREE_CODE (t
) != NAMESPACE_DECL
)
14355 ggc_mark_tree (ld
->decl_flags
.u
.template_info
);
14357 mark_binding_level (&NAMESPACE_LEVEL (t
));
14358 if (CAN_HAVE_FULL_LANG_DECL_P (t
))
14360 ggc_mark_tree (ld
->main_decl_variant
);
14361 ggc_mark_tree (ld
->befriending_classes
);
14362 ggc_mark_tree (ld
->saved_tree
);
14363 if (TREE_CODE (t
) == TYPE_DECL
)
14364 ggc_mark_tree (ld
->u
.sorted_fields
);
14365 else if (TREE_CODE (t
) == FUNCTION_DECL
14366 && !DECL_PENDING_INLINE_P (t
))
14367 mark_lang_function (DECL_SAVED_FUNCTION_DATA (t
));
14371 else if (TREE_CODE_CLASS (code
) == 't')
14373 struct lang_type
*lt
= TYPE_LANG_SPECIFIC (t
);
14375 if (lt
&& !(TREE_CODE (t
) == POINTER_TYPE
14376 && TREE_CODE (TREE_TYPE (t
)) == METHOD_TYPE
))
14379 ggc_mark_tree (lt
->vfields
);
14380 ggc_mark_tree (lt
->vbases
);
14381 ggc_mark_tree (lt
->tags
);
14382 ggc_mark_tree (lt
->search_slot
);
14383 ggc_mark_tree (lt
->size
);
14384 ggc_mark_tree (lt
->abstract_virtuals
);
14385 ggc_mark_tree (lt
->friend_classes
);
14386 ggc_mark_tree (lt
->rtti
);
14387 ggc_mark_tree (lt
->methods
);
14388 ggc_mark_tree (lt
->template_info
);
14389 ggc_mark_tree (lt
->befriending_classes
);
14392 /* In the case of pointer-to-member function types, the
14393 TYPE_LANG_SPECIFIC is really just a tree. */
14394 ggc_mark_tree ((tree
) lt
);