1 /* Process declarations and variables for C++ compiler.
2 Copyright (C) 1988, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000,
3 2001, 2002, 2003, 2004 Free Software Foundation, Inc.
4 Contributed by Michael Tiemann (tiemann@cygnus.com)
6 This file is part of GCC.
8 GCC is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2, or (at your option)
13 GCC is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with GCC; see the file COPYING. If not, write to
20 the Free Software Foundation, 59 Temple Place - Suite 330,
21 Boston, MA 02111-1307, USA. */
24 /* Process declarations and symbol lookup for C++ front end.
25 Also constructs types; the standard scalar types at initialization,
26 and structure, union, array and enum types when they are declared. */
28 /* ??? not all decl nodes are given the most useful possible
29 line numbers. For example, the CONST_DECLs for enum values. */
33 #include "coretypes.h"
40 #include "tree-inline.h"
50 #include "diagnostic.h"
53 #include "tree-flow.h"
55 static tree
grokparms (cp_parameter_declarator
*, tree
*);
56 static const char *redeclaration_error_message (tree
, tree
);
58 static int decl_jump_unsafe (tree
);
59 static void require_complete_types_for_parms (tree
);
60 static int ambi_op_p (enum tree_code
);
61 static int unary_op_p (enum tree_code
);
62 static void push_local_name (tree
);
63 static tree
grok_reference_init (tree
, tree
, tree
, tree
*);
64 static tree
grokfndecl (tree
, tree
, tree
, tree
, tree
, int,
65 enum overload_flags
, cp_cv_quals
,
66 tree
, int, int, int, int, int, int, tree
,
68 static tree
grokvardecl (tree
, tree
, const cp_decl_specifier_seq
*,
70 static void record_unknown_type (tree
, const char *);
71 static tree
builtin_function_1 (const char *, tree
, tree
,
72 enum built_in_function code
,
73 enum built_in_class cl
, const char *,
75 static tree
build_library_fn_1 (tree
, enum tree_code
, tree
);
76 static int member_function_or_else (tree
, tree
, enum overload_flags
);
77 static void bad_specifiers (tree
, const char *, int, int, int, int,
79 static void check_for_uninitialized_const_var (tree
);
80 static hashval_t
typename_hash (const void *);
81 static int typename_compare (const void *, const void *);
82 static tree
local_variable_p_walkfn (tree
*, int *, void *);
83 static tree
record_builtin_java_type (const char *, int);
84 static const char *tag_name (enum tag_types code
);
85 static int walk_namespaces_r (tree
, walk_namespaces_fn
, void *);
86 static int walk_globals_r (tree
, void*);
87 static int walk_vtables_r (tree
, void*);
88 static tree
make_label_decl (tree
, int);
89 static void use_label (tree
);
90 static void check_previous_goto_1 (tree
, struct cp_binding_level
*, tree
,
92 static void check_previous_goto (struct named_label_use_list
*);
93 static void check_switch_goto (struct cp_binding_level
*);
94 static void check_previous_gotos (tree
);
95 static void pop_label (tree
, tree
);
96 static void pop_labels (tree
);
97 static void maybe_deduce_size_from_array_init (tree
, tree
);
98 static void layout_var_decl (tree
);
99 static void maybe_commonize_var (tree
);
100 static tree
check_initializer (tree
, tree
, int, tree
*);
101 static void make_rtl_for_nonlocal_decl (tree
, tree
, const char *);
102 static void save_function_data (tree
);
103 static void check_function_type (tree
, tree
);
104 static void finish_constructor_body (void);
105 static void begin_destructor_body (void);
106 static void finish_destructor_body (void);
107 static tree
create_array_type_for_decl (tree
, tree
, tree
);
108 static tree
get_atexit_node (void);
109 static tree
get_dso_handle_node (void);
110 static tree
start_cleanup_fn (void);
111 static void end_cleanup_fn (void);
112 static tree
cp_make_fname_decl (tree
, int);
113 static void initialize_predefined_identifiers (void);
114 static tree check_special_function_return_type
115 (special_function_kind
, tree
, tree
);
116 static tree
push_cp_library_fn (enum tree_code
, tree
);
117 static tree
build_cp_library_fn (tree
, enum tree_code
, tree
);
118 static void store_parm_decls (tree
);
119 static void initialize_local_var (tree
, tree
);
120 static void expand_static_init (tree
, tree
);
121 static tree
next_initializable_field (tree
);
122 static tree
reshape_init (tree
, tree
*);
123 static tree
build_typename_type (tree
, tree
, tree
);
125 /* Erroneous argument lists can use this *IFF* they do not modify it. */
126 tree error_mark_list
;
128 /* The following symbols are subsumed in the cp_global_trees array, and
129 listed here individually for documentation purposes.
132 tree wchar_decl_node;
134 tree vtable_entry_type;
135 tree delta_type_node;
136 tree __t_desc_type_node;
137 tree ti_desc_type_node;
138 tree bltn_desc_type_node, ptr_desc_type_node;
139 tree ary_desc_type_node, func_desc_type_node, enum_desc_type_node;
140 tree class_desc_type_node, si_class_desc_type_node, vmi_class_desc_type_node;
141 tree ptm_desc_type_node;
142 tree base_desc_type_node;
144 tree class_type_node;
145 tree unknown_type_node;
147 Array type `vtable_entry_type[]'
150 tree vtbl_ptr_type_node;
157 A FUNCTION_DECL which can call `abort'. Not necessarily the
158 one that the user will declare, but sufficient to be called
159 by routines that want to abort the program.
163 The FUNCTION_DECL for the default `::operator delete'.
165 tree global_delete_fndecl;
168 tree type_info_type_node, tinfo_decl_id, tinfo_decl_type;
173 tree cp_global_trees
[CPTI_MAX
];
175 /* Indicates that there is a type value in some namespace, although
176 that is not necessarily in scope at the moment. */
178 tree global_type_node
;
180 /* The node that holds the "name" of the global scope. */
181 tree global_scope_name
;
183 /* Used only for jumps to as-yet undefined labels, since jumps to
184 defined labels can have their validity checked immediately. */
186 struct named_label_use_list
GTY(())
188 struct cp_binding_level
*binding_level
;
191 location_t o_goto_locus
;
192 struct named_label_use_list
*next
;
195 #define named_label_uses cp_function_chain->x_named_label_uses
197 #define local_names cp_function_chain->x_local_names
199 /* A list of objects which have constructors or destructors
200 which reside in the global scope. The decl is stored in
201 the TREE_VALUE slot and the initializer is stored
202 in the TREE_PURPOSE slot. */
203 tree static_aggregates
;
207 /* A node for the integer constants 2, and 3. */
209 tree integer_two_node
, integer_three_node
;
211 /* A list of all LABEL_DECLs in the function that have names. Here so
212 we can clear out their names' definitions at the end of the
213 function, and so we can check the validity of jumps to these labels. */
215 struct named_label_list
GTY(())
217 struct cp_binding_level
*binding_level
;
222 struct named_label_list
*next
;
223 unsigned int in_try_scope
: 1;
224 unsigned int in_catch_scope
: 1;
227 #define named_labels cp_function_chain->x_named_labels
229 /* The number of function bodies which we are currently processing.
230 (Zero if we are at namespace scope, one inside the body of a
231 function, two inside the body of a function in a local class, etc.) */
234 /* States indicating how grokdeclarator() should handle declspecs marked
235 with __attribute__((deprecated)). An object declared as
236 __attribute__((deprecated)) suppresses warnings of uses of other
239 enum deprecated_states
{
244 static enum deprecated_states deprecated_state
= DEPRECATED_NORMAL
;
246 /* True if a declaration with an `extern' linkage specifier is being
248 bool have_extern_spec
;
251 /* A TREE_LIST of VAR_DECLs. The TREE_PURPOSE is a RECORD_TYPE or
252 UNION_TYPE; the TREE_VALUE is a VAR_DECL with that type. At the
253 time the VAR_DECL was declared, the type was incomplete. */
255 static GTY(()) tree incomplete_vars
;
257 /* Returns the kind of template specialization we are currently
258 processing, given that it's declaration contained N_CLASS_SCOPES
259 explicit scope qualifications. */
262 current_tmpl_spec_kind (int n_class_scopes
)
264 int n_template_parm_scopes
= 0;
265 int seen_specialization_p
= 0;
266 int innermost_specialization_p
= 0;
267 struct cp_binding_level
*b
;
269 /* Scan through the template parameter scopes. */
270 for (b
= current_binding_level
;
271 b
->kind
== sk_template_parms
;
274 /* If we see a specialization scope inside a parameter scope,
275 then something is wrong. That corresponds to a declaration
278 template <class T> template <> ...
280 which is always invalid since [temp.expl.spec] forbids the
281 specialization of a class member template if the enclosing
282 class templates are not explicitly specialized as well. */
283 if (b
->explicit_spec_p
)
285 if (n_template_parm_scopes
== 0)
286 innermost_specialization_p
= 1;
288 seen_specialization_p
= 1;
290 else if (seen_specialization_p
== 1)
291 return tsk_invalid_member_spec
;
293 ++n_template_parm_scopes
;
296 /* Handle explicit instantiations. */
297 if (processing_explicit_instantiation
)
299 if (n_template_parm_scopes
!= 0)
300 /* We've seen a template parameter list during an explicit
301 instantiation. For example:
303 template <class T> template void f(int);
305 This is erroneous. */
306 return tsk_invalid_expl_inst
;
308 return tsk_expl_inst
;
311 if (n_template_parm_scopes
< n_class_scopes
)
312 /* We've not seen enough template headers to match all the
313 specialized classes present. For example:
315 template <class T> void R<T>::S<T>::f(int);
317 This is invalid; there needs to be one set of template
318 parameters for each class. */
319 return tsk_insufficient_parms
;
320 else if (n_template_parm_scopes
== n_class_scopes
)
321 /* We're processing a non-template declaration (even though it may
322 be a member of a template class.) For example:
324 template <class T> void S<T>::f(int);
326 The `class T' maches the `S<T>', leaving no template headers
327 corresponding to the `f'. */
329 else if (n_template_parm_scopes
> n_class_scopes
+ 1)
330 /* We've got too many template headers. For example:
332 template <> template <class T> void f (T);
334 There need to be more enclosing classes. */
335 return tsk_excessive_parms
;
337 /* This must be a template. It's of the form:
339 template <class T> template <class U> void S<T>::f(U);
341 This is a specialization if the innermost level was a
342 specialization; otherwise it's just a definition of the
344 return innermost_specialization_p
? tsk_expl_spec
: tsk_template
;
347 /* Exit the current scope. */
355 /* When a label goes out of scope, check to see if that label was used
356 in a valid manner, and issue any appropriate warnings or errors. */
359 pop_label (tree label
, tree old_value
)
361 if (!processing_template_decl
)
363 if (DECL_INITIAL (label
) == NULL_TREE
)
367 cp_error_at ("label `%D' used but not defined", label
);
368 #ifdef USE_MAPPED_LOCATION
369 location
= input_location
; /* FIXME want (input_filename, (line)0) */
371 location
.file
= input_filename
;
374 /* Avoid crashing later. */
375 define_label (location
, DECL_NAME (label
));
377 else if (warn_unused_label
&& !TREE_USED (label
))
378 cp_warning_at ("label `%D' defined but not used", label
);
381 SET_IDENTIFIER_LABEL_VALUE (DECL_NAME (label
), old_value
);
384 /* At the end of a function, all labels declared within the function
385 go out of scope. BLOCK is the top-level block for the
389 pop_labels (tree block
)
391 struct named_label_list
*link
;
393 /* Clear out the definitions of all label names, since their scopes
395 for (link
= named_labels
; link
; link
= link
->next
)
397 pop_label (link
->label_decl
, link
->old_value
);
398 /* Put the labels into the "variables" of the top-level block,
399 so debugger can see them. */
400 TREE_CHAIN (link
->label_decl
) = BLOCK_VARS (block
);
401 BLOCK_VARS (block
) = link
->label_decl
;
407 /* The following two routines are used to interface to Objective-C++.
408 The binding level is purposely treated as an opaque type. */
411 objc_get_current_scope (void)
413 return current_binding_level
;
416 /* The following routine is used by the NeXT-style SJLJ exceptions;
417 variables get marked 'volatile' so as to not be clobbered by
418 _setjmp()/_longjmp() calls. All variables in the current scope,
419 as well as parent scopes up to (but not including) ENCLOSING_BLK
420 shall be thusly marked. */
423 objc_mark_locals_volatile (void *enclosing_blk
)
425 struct cp_binding_level
*scope
;
427 for (scope
= current_binding_level
;
428 scope
&& scope
!= enclosing_blk
&& scope
->kind
== sk_block
;
429 scope
= scope
->level_chain
)
433 for (decl
= scope
->names
; decl
; decl
= TREE_CHAIN (decl
))
435 if (TREE_CODE (decl
) == VAR_DECL
)
437 DECL_REGISTER (decl
) = 0;
438 TREE_THIS_VOLATILE (decl
) = 1;
444 /* Exit a binding level.
445 Pop the level off, and restore the state of the identifier-decl mappings
446 that were in effect when this level was entered.
448 If KEEP == 1, this level had explicit declarations, so
449 and create a "block" (a BLOCK node) for the level
450 to record its declarations and subblocks for symbol table output.
452 If FUNCTIONBODY is nonzero, this level is the body of a function,
453 so create a block as if KEEP were set and also clear out all
456 If REVERSE is nonzero, reverse the order of decls before putting
457 them into the BLOCK. */
460 poplevel (int keep
, int reverse
, int functionbody
)
463 /* The chain of decls was accumulated in reverse order.
464 Put it into forward order, just for cleanliness. */
466 int tmp
= functionbody
;
467 int real_functionbody
;
471 int leaving_for_scope
;
474 timevar_push (TV_NAME_LOOKUP
);
479 gcc_assert (current_binding_level
->kind
!= sk_class
);
481 real_functionbody
= (current_binding_level
->kind
== sk_cleanup
482 ? ((functionbody
= 0), tmp
) : functionbody
);
483 subblocks
= functionbody
>= 0 ? current_binding_level
->blocks
: 0;
485 gcc_assert (!VEC_length(cp_class_binding
,
486 current_binding_level
->class_shadowed
));
488 /* We used to use KEEP == 2 to indicate that the new block should go
489 at the beginning of the list of blocks at this binding level,
490 rather than the end. This hack is no longer used. */
491 gcc_assert (keep
== 0 || keep
== 1);
493 if (current_binding_level
->keep
)
496 /* Any uses of undefined labels, and any defined labels, now operate
497 under constraints of next binding contour. */
498 if (cfun
&& !functionbody
)
500 struct cp_binding_level
*level_chain
;
501 level_chain
= current_binding_level
->level_chain
;
504 struct named_label_use_list
*uses
;
505 struct named_label_list
*labels
;
506 for (labels
= named_labels
; labels
; labels
= labels
->next
)
507 if (labels
->binding_level
== current_binding_level
)
510 if (current_binding_level
->kind
== sk_try
)
511 labels
->in_try_scope
= 1;
512 if (current_binding_level
->kind
== sk_catch
)
513 labels
->in_catch_scope
= 1;
514 for (decl
= labels
->names_in_scope
; decl
;
515 decl
= TREE_CHAIN (decl
))
516 if (decl_jump_unsafe (decl
))
517 labels
->bad_decls
= tree_cons (NULL_TREE
, decl
,
519 labels
->binding_level
= level_chain
;
520 labels
->names_in_scope
= level_chain
->names
;
523 for (uses
= named_label_uses
; uses
; uses
= uses
->next
)
524 if (uses
->binding_level
== current_binding_level
)
526 uses
->binding_level
= level_chain
;
527 uses
->names_in_scope
= level_chain
->names
;
532 /* Get the decls in the order they were written.
533 Usually current_binding_level->names is in reverse order.
534 But parameter decls were previously put in forward order. */
537 current_binding_level
->names
538 = decls
= nreverse (current_binding_level
->names
);
540 decls
= current_binding_level
->names
;
542 /* If there were any declarations or structure tags in that level,
543 or if this level is a function body,
544 create a BLOCK to record them for the life of this function. */
546 if (keep
== 1 || functionbody
)
547 block
= make_node (BLOCK
);
548 if (block
!= NULL_TREE
)
550 BLOCK_VARS (block
) = decls
;
551 BLOCK_SUBBLOCKS (block
) = subblocks
;
554 /* In each subblock, record that this is its superior. */
556 for (link
= subblocks
; link
; link
= TREE_CHAIN (link
))
557 BLOCK_SUPERCONTEXT (link
) = block
;
559 /* We still support the old for-scope rules, whereby the variables
560 in a for-init statement were in scope after the for-statement
561 ended. We only use the new rules if flag_new_for_scope is
564 = current_binding_level
->kind
== sk_for
&& flag_new_for_scope
== 1;
566 /* Before we remove the declarations first check for unused variables. */
567 if (warn_unused_variable
568 && !processing_template_decl
)
569 for (decl
= getdecls (); decl
; decl
= TREE_CHAIN (decl
))
570 if (TREE_CODE (decl
) == VAR_DECL
571 && ! TREE_USED (decl
)
572 && ! DECL_IN_SYSTEM_HEADER (decl
)
573 && DECL_NAME (decl
) && ! DECL_ARTIFICIAL (decl
))
574 warning ("%Junused variable '%D'", decl
, decl
);
576 /* Remove declarations for all the DECLs in this level. */
577 for (link
= decls
; link
; link
= TREE_CHAIN (link
))
579 if (leaving_for_scope
&& TREE_CODE (link
) == VAR_DECL
582 tree name
= DECL_NAME (link
);
586 ob
= outer_binding (name
,
587 IDENTIFIER_BINDING (name
),
590 ns_binding
= IDENTIFIER_NAMESPACE_VALUE (name
);
592 ns_binding
= NULL_TREE
;
594 if (ob
&& ob
->scope
== current_binding_level
->level_chain
)
595 /* We have something like:
600 and we are leaving the `for' scope. There's no reason to
601 keep the binding of the inner `i' in this case. */
602 pop_binding (name
, link
);
603 else if ((ob
&& (TREE_CODE (ob
->value
) == TYPE_DECL
))
604 || (ns_binding
&& TREE_CODE (ns_binding
) == TYPE_DECL
))
605 /* Here, we have something like:
613 We must pop the for-scope binding so we know what's a
614 type and what isn't. */
615 pop_binding (name
, link
);
618 /* Mark this VAR_DECL as dead so that we can tell we left it
619 there only for backward compatibility. */
620 DECL_DEAD_FOR_LOCAL (link
) = 1;
622 /* Keep track of what should have happened when we
623 popped the binding. */
625 DECL_SHADOWED_FOR_VAR (link
) = ob
->value
;
627 /* Add it to the list of dead variables in the next
628 outermost binding to that we can remove these when we
629 leave that binding. */
630 current_binding_level
->level_chain
->dead_vars_from_for
631 = tree_cons (NULL_TREE
, link
,
632 current_binding_level
->level_chain
->
635 /* Although we don't pop the cxx_binding, we do clear
636 its SCOPE since the scope is going away now. */
637 IDENTIFIER_BINDING (name
)->scope
638 = current_binding_level
->level_chain
;
645 /* Remove the binding. */
648 if (TREE_CODE (decl
) == TREE_LIST
)
649 decl
= TREE_VALUE (decl
);
652 if (TREE_CODE (name
) == OVERLOAD
)
653 name
= OVL_FUNCTION (name
);
655 gcc_assert (DECL_P (name
));
656 pop_binding (DECL_NAME (name
), decl
);
660 /* Remove declarations for any `for' variables from inner scopes
661 that we kept around. */
662 for (link
= current_binding_level
->dead_vars_from_for
;
663 link
; link
= TREE_CHAIN (link
))
664 pop_binding (DECL_NAME (TREE_VALUE (link
)), TREE_VALUE (link
));
666 /* Restore the IDENTIFIER_TYPE_VALUEs. */
667 for (link
= current_binding_level
->type_shadowed
;
668 link
; link
= TREE_CHAIN (link
))
669 SET_IDENTIFIER_TYPE_VALUE (TREE_PURPOSE (link
), TREE_VALUE (link
));
671 /* Restore the IDENTIFIER_LABEL_VALUEs for local labels. */
672 for (link
= current_binding_level
->shadowed_labels
;
674 link
= TREE_CHAIN (link
))
675 pop_label (TREE_VALUE (link
), TREE_PURPOSE (link
));
677 /* There may be OVERLOADs (wrapped in TREE_LISTs) on the BLOCK_VARs
678 list if a `using' declaration put them there. The debugging
679 back-ends won't understand OVERLOAD, so we remove them here.
680 Because the BLOCK_VARS are (temporarily) shared with
681 CURRENT_BINDING_LEVEL->NAMES we must do this fixup after we have
682 popped all the bindings. */
687 for (d
= &BLOCK_VARS (block
); *d
; )
689 if (TREE_CODE (*d
) == TREE_LIST
)
690 *d
= TREE_CHAIN (*d
);
692 d
= &TREE_CHAIN (*d
);
696 /* If the level being exited is the top level of a function,
697 check over all the labels. */
700 /* Since this is the top level block of a function, the vars are
701 the function's parameters. Don't leave them in the BLOCK
702 because they are found in the FUNCTION_DECL instead. */
703 BLOCK_VARS (block
) = 0;
707 kind
= current_binding_level
->kind
;
708 if (kind
== sk_cleanup
)
712 /* If this is a temporary binding created for a cleanup, then we'll
713 have pushed a statement list level. Pop that, create a new
714 BIND_EXPR for the block, and insert it into the stream. */
715 stmt
= pop_stmt_list (current_binding_level
->statement_list
);
716 stmt
= c_build_bind_expr (block
, stmt
);
722 DECL_INITIAL (current_function_decl
) = block
;
724 current_binding_level
->blocks
725 = chainon (current_binding_level
->blocks
, block
);
727 /* If we did not make a block for the level just exited,
728 any blocks made for inner levels
729 (since they cannot be recorded as subblocks in that level)
730 must be carried forward so they will later become subblocks
731 of something else. */
733 current_binding_level
->blocks
734 = chainon (current_binding_level
->blocks
, subblocks
);
736 /* Each and every BLOCK node created here in `poplevel' is important
737 (e.g. for proper debugging information) so if we created one
738 earlier, mark it as "used". */
740 TREE_USED (block
) = 1;
742 /* All temporary bindings created for cleanups are popped silently. */
743 if (kind
== sk_cleanup
)
746 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP
, block
);
749 /* Delete the node BLOCK from the current binding level.
750 This is used for the block inside a stmt expr ({...})
751 so that the block can be reinserted where appropriate. */
754 delete_block (tree block
)
757 if (current_binding_level
->blocks
== block
)
758 current_binding_level
->blocks
= TREE_CHAIN (block
);
759 for (t
= current_binding_level
->blocks
; t
;)
761 if (TREE_CHAIN (t
) == block
)
762 TREE_CHAIN (t
) = TREE_CHAIN (block
);
766 TREE_CHAIN (block
) = NULL_TREE
;
767 /* Clear TREE_USED which is always set by poplevel.
768 The flag is set again if insert_block is called. */
769 TREE_USED (block
) = 0;
772 /* Insert BLOCK at the end of the list of subblocks of the
773 current binding level. This is used when a BIND_EXPR is expanded,
774 to handle the BLOCK node inside the BIND_EXPR. */
777 insert_block (tree block
)
779 TREE_USED (block
) = 1;
780 current_binding_level
->blocks
781 = chainon (current_binding_level
->blocks
, block
);
784 /* Returns nonzero if T is a virtual function table. */
787 vtable_decl_p (tree t
, void* data ATTRIBUTE_UNUSED
)
789 return (TREE_CODE (t
) == VAR_DECL
&& DECL_VIRTUAL_P (t
));
792 /* Returns nonzero if T is a TYPE_DECL for a type with virtual
796 vtype_decl_p (tree t
, void *data ATTRIBUTE_UNUSED
)
798 return (TREE_CODE (t
) == TYPE_DECL
799 && TREE_CODE (TREE_TYPE (t
)) == RECORD_TYPE
800 && TYPE_POLYMORPHIC_P (TREE_TYPE (t
)));
803 struct walk_globals_data
{
809 /* Walk the vtable declarations in NAMESPACE. Whenever one is found
810 for which P returns nonzero, call F with its address. If any call
811 to F returns a nonzero value, return a nonzero value. */
814 walk_vtables_r (tree
namespace, void* data
)
816 struct walk_globals_data
* wgd
= (struct walk_globals_data
*) data
;
817 walk_globals_fn f
= wgd
->f
;
819 tree decl
= NAMESPACE_LEVEL (namespace)->vtables
;
822 for (; decl
; decl
= TREE_CHAIN (decl
))
823 result
|= (*f
) (&decl
, d
);
828 /* Walk the vtable declarations. Whenever one is found for which P
829 returns nonzero, call F with its address. If any call to F
830 returns a nonzero value, return a nonzero value. */
832 walk_vtables (walk_globals_pred p
, walk_globals_fn f
, void *data
)
834 struct walk_globals_data wgd
;
839 return walk_namespaces (walk_vtables_r
, &wgd
);
842 /* Walk all the namespaces contained NAMESPACE, including NAMESPACE
843 itself, calling F for each. The DATA is passed to F as well. */
846 walk_namespaces_r (tree
namespace, walk_namespaces_fn f
, void* data
)
849 tree current
= NAMESPACE_LEVEL (namespace)->namespaces
;
851 result
|= (*f
) (namespace, data
);
853 for (; current
; current
= TREE_CHAIN (current
))
854 result
|= walk_namespaces_r (current
, f
, data
);
859 /* Walk all the namespaces, calling F for each. The DATA is passed to
863 walk_namespaces (walk_namespaces_fn f
, void* data
)
865 return walk_namespaces_r (global_namespace
, f
, data
);
868 /* Walk the global declarations in NAMESPACE. Whenever one is found
869 for which P returns nonzero, call F with its address. If any call
870 to F returns a nonzero value, return a nonzero value. */
873 walk_globals_r (tree
namespace, void* data
)
875 struct walk_globals_data
* wgd
= (struct walk_globals_data
*) data
;
876 walk_globals_pred p
= wgd
->p
;
877 walk_globals_fn f
= wgd
->f
;
882 t
= &NAMESPACE_LEVEL (namespace)->names
;
889 result
|= (*f
) (t
, d
);
891 /* If F changed *T, then *T still points at the next item to
894 t
= &TREE_CHAIN (*t
);
900 /* Walk the global declarations. Whenever one is found for which P
901 returns true, call F with its address. If any call to F
902 returns true, return true. */
905 walk_globals (walk_globals_pred p
, walk_globals_fn f
, void *data
)
907 struct walk_globals_data wgd
;
912 return walk_namespaces (walk_globals_r
, &wgd
);
915 /* Call wrapup_globals_declarations for the globals in NAMESPACE. If
916 DATA is non-NULL, this is the last time we will call
917 wrapup_global_declarations for this NAMESPACE. */
920 wrapup_globals_for_namespace (tree
namespace, void* data
)
922 struct cp_binding_level
*level
= NAMESPACE_LEVEL (namespace);
923 varray_type statics
= level
->static_decls
;
924 tree
*vec
= &VARRAY_TREE (statics
, 0);
925 int len
= VARRAY_ACTIVE_SIZE (statics
);
926 int last_time
= (data
!= 0);
930 check_global_declarations (vec
, len
);
934 /* Write out any globals that need to be output. */
935 return wrapup_global_declarations (vec
, len
);
939 /* In C++, you don't have to write `struct S' to refer to `S'; you
940 can just use `S'. We accomplish this by creating a TYPE_DECL as
941 if the user had written `typedef struct S S'. Create and return
942 the TYPE_DECL for TYPE. */
945 create_implicit_typedef (tree name
, tree type
)
949 decl
= build_decl (TYPE_DECL
, name
, type
);
950 DECL_ARTIFICIAL (decl
) = 1;
951 /* There are other implicit type declarations, like the one *within*
952 a class that allows you to write `S::S'. We must distinguish
954 SET_DECL_IMPLICIT_TYPEDEF_P (decl
);
955 TYPE_NAME (type
) = decl
;
960 /* Remember a local name for name-mangling purposes. */
963 push_local_name (tree decl
)
968 timevar_push (TV_NAME_LOOKUP
);
970 VARRAY_TREE_INIT (local_names
, 8, "local_names");
972 name
= DECL_NAME (decl
);
974 nelts
= VARRAY_ACTIVE_SIZE (local_names
);
975 for (i
= 0; i
< nelts
; i
++)
977 t
= VARRAY_TREE (local_names
, i
);
978 if (DECL_NAME (t
) == name
)
980 if (!DECL_LANG_SPECIFIC (decl
))
981 retrofit_lang_decl (decl
);
982 DECL_LANG_SPECIFIC (decl
)->decl_flags
.u2sel
= 1;
983 if (DECL_LANG_SPECIFIC (t
))
984 DECL_DISCRIMINATOR (decl
) = DECL_DISCRIMINATOR (t
) + 1;
986 DECL_DISCRIMINATOR (decl
) = 1;
988 VARRAY_TREE (local_names
, i
) = decl
;
989 timevar_pop (TV_NAME_LOOKUP
);
994 VARRAY_PUSH_TREE (local_names
, decl
);
995 timevar_pop (TV_NAME_LOOKUP
);
998 /* Subroutine of duplicate_decls: return truthvalue of whether
999 or not types of these decls match.
1001 For C++, we must compare the parameter list so that `int' can match
1002 `int&' in a parameter position, but `int&' is not confused with
1006 decls_match (tree newdecl
, tree olddecl
)
1010 if (newdecl
== olddecl
)
1013 if (TREE_CODE (newdecl
) != TREE_CODE (olddecl
))
1014 /* If the two DECLs are not even the same kind of thing, we're not
1015 interested in their types. */
1018 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1020 tree f1
= TREE_TYPE (newdecl
);
1021 tree f2
= TREE_TYPE (olddecl
);
1022 tree p1
= TYPE_ARG_TYPES (f1
);
1023 tree p2
= TYPE_ARG_TYPES (f2
);
1025 if (CP_DECL_CONTEXT (newdecl
) != CP_DECL_CONTEXT (olddecl
)
1026 && ! (DECL_EXTERN_C_P (newdecl
)
1027 && DECL_EXTERN_C_P (olddecl
)))
1030 if (TREE_CODE (f1
) != TREE_CODE (f2
))
1033 if (same_type_p (TREE_TYPE (f1
), TREE_TYPE (f2
)))
1035 if (p2
== NULL_TREE
&& DECL_EXTERN_C_P (olddecl
)
1036 && (DECL_BUILT_IN (olddecl
)
1037 #ifndef NO_IMPLICIT_EXTERN_C
1038 || (DECL_IN_SYSTEM_HEADER (newdecl
) && !DECL_CLASS_SCOPE_P (newdecl
))
1039 || (DECL_IN_SYSTEM_HEADER (olddecl
) && !DECL_CLASS_SCOPE_P (olddecl
))
1043 types_match
= self_promoting_args_p (p1
);
1044 if (p1
== void_list_node
)
1045 TREE_TYPE (newdecl
) = TREE_TYPE (olddecl
);
1047 #ifndef NO_IMPLICIT_EXTERN_C
1048 else if (p1
== NULL_TREE
1049 && (DECL_EXTERN_C_P (olddecl
)
1050 && DECL_IN_SYSTEM_HEADER (olddecl
)
1051 && !DECL_CLASS_SCOPE_P (olddecl
))
1052 && (DECL_EXTERN_C_P (newdecl
)
1053 && DECL_IN_SYSTEM_HEADER (newdecl
)
1054 && !DECL_CLASS_SCOPE_P (newdecl
)))
1056 types_match
= self_promoting_args_p (p2
);
1057 TREE_TYPE (newdecl
) = TREE_TYPE (olddecl
);
1061 types_match
= compparms (p1
, p2
);
1066 else if (TREE_CODE (newdecl
) == TEMPLATE_DECL
)
1068 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
))
1069 != TREE_CODE (DECL_TEMPLATE_RESULT (olddecl
)))
1072 if (!comp_template_parms (DECL_TEMPLATE_PARMS (newdecl
),
1073 DECL_TEMPLATE_PARMS (olddecl
)))
1076 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) == TYPE_DECL
)
1077 types_match
= same_type_p (TREE_TYPE (DECL_TEMPLATE_RESULT (olddecl
)),
1078 TREE_TYPE (DECL_TEMPLATE_RESULT (newdecl
)));
1080 types_match
= decls_match (DECL_TEMPLATE_RESULT (olddecl
),
1081 DECL_TEMPLATE_RESULT (newdecl
));
1085 if (TREE_TYPE (newdecl
) == error_mark_node
)
1086 types_match
= TREE_TYPE (olddecl
) == error_mark_node
;
1087 else if (TREE_TYPE (olddecl
) == NULL_TREE
)
1088 types_match
= TREE_TYPE (newdecl
) == NULL_TREE
;
1089 else if (TREE_TYPE (newdecl
) == NULL_TREE
)
1092 types_match
= comptypes (TREE_TYPE (newdecl
),
1093 TREE_TYPE (olddecl
),
1094 COMPARE_REDECLARATION
);
1100 /* If NEWDECL is `static' and an `extern' was seen previously,
1101 warn about it. OLDDECL is the previous declaration.
1103 Note that this does not apply to the C++ case of declaring
1104 a variable `extern const' and then later `const'.
1106 Don't complain about built-in functions, since they are beyond
1107 the user's control. */
1110 warn_extern_redeclared_static (tree newdecl
, tree olddecl
)
1114 if (TREE_CODE (newdecl
) == TYPE_DECL
1115 || TREE_CODE (newdecl
) == TEMPLATE_DECL
1116 || TREE_CODE (newdecl
) == CONST_DECL
1117 || TREE_CODE (newdecl
) == NAMESPACE_DECL
)
1120 /* Don't get confused by static member functions; that's a different
1122 if (TREE_CODE (newdecl
) == FUNCTION_DECL
1123 && DECL_STATIC_FUNCTION_P (newdecl
))
1126 /* If the old declaration was `static', or the new one isn't, then
1127 then everything is OK. */
1128 if (DECL_THIS_STATIC (olddecl
) || !DECL_THIS_STATIC (newdecl
))
1131 /* It's OK to declare a builtin function as `static'. */
1132 if (TREE_CODE (olddecl
) == FUNCTION_DECL
1133 && DECL_ARTIFICIAL (olddecl
))
1136 name
= DECL_ASSEMBLER_NAME (newdecl
);
1137 pedwarn ("`%D' was declared `extern' and later `static'", newdecl
);
1138 cp_pedwarn_at ("previous declaration of `%D'", olddecl
);
1141 /* If NEWDECL is a redeclaration of OLDDECL, merge the declarations.
1142 If the redeclaration is invalid, a diagnostic is issued, and the
1143 error_mark_node is returned. Otherwise, OLDDECL is returned.
1145 If NEWDECL is not a redeclaration of OLDDECL, NULL_TREE is
1149 duplicate_decls (tree newdecl
, tree olddecl
)
1151 unsigned olddecl_uid
= DECL_UID (olddecl
);
1152 int olddecl_friend
= 0, types_match
= 0;
1153 int new_defines_function
= 0;
1155 if (newdecl
== olddecl
)
1158 types_match
= decls_match (newdecl
, olddecl
);
1160 /* If either the type of the new decl or the type of the old decl is an
1161 error_mark_node, then that implies that we have already issued an
1162 error (earlier) for some bogus type specification, and in that case,
1163 it is rather pointless to harass the user with yet more error message
1164 about the same declaration, so just pretend the types match here. */
1165 if (TREE_TYPE (newdecl
) == error_mark_node
1166 || TREE_TYPE (olddecl
) == error_mark_node
)
1169 if (DECL_P (olddecl
)
1170 && TREE_CODE (newdecl
) == FUNCTION_DECL
1171 && TREE_CODE (olddecl
) == FUNCTION_DECL
1172 && (DECL_UNINLINABLE (newdecl
) || DECL_UNINLINABLE (olddecl
)))
1174 if (DECL_DECLARED_INLINE_P (newdecl
)
1175 && DECL_UNINLINABLE (newdecl
)
1176 && lookup_attribute ("noinline", DECL_ATTRIBUTES (newdecl
)))
1177 /* Already warned elsewhere. */;
1178 else if (DECL_DECLARED_INLINE_P (olddecl
)
1179 && DECL_UNINLINABLE (olddecl
)
1180 && lookup_attribute ("noinline", DECL_ATTRIBUTES (olddecl
)))
1181 /* Already warned. */;
1182 else if (DECL_DECLARED_INLINE_P (newdecl
)
1183 && DECL_UNINLINABLE (olddecl
)
1184 && lookup_attribute ("noinline", DECL_ATTRIBUTES (olddecl
)))
1186 warning ("%Jfunction '%D' redeclared as inline", newdecl
, newdecl
);
1187 warning ("%Jprevious declaration of '%D' with attribute noinline",
1190 else if (DECL_DECLARED_INLINE_P (olddecl
)
1191 && DECL_UNINLINABLE (newdecl
)
1192 && lookup_attribute ("noinline", DECL_ATTRIBUTES (newdecl
)))
1194 warning ("%Jfunction '%D' redeclared with attribute noinline",
1196 warning ("%Jprevious declaration of '%D' was inline",
1201 /* Check for redeclaration and other discrepancies. */
1202 if (TREE_CODE (olddecl
) == FUNCTION_DECL
1203 && DECL_ARTIFICIAL (olddecl
))
1205 if (TREE_CODE (newdecl
) != FUNCTION_DECL
)
1207 /* Avoid warnings redeclaring anticipated built-ins. */
1208 if (DECL_ANTICIPATED (olddecl
))
1211 /* If you declare a built-in or predefined function name as static,
1212 the old definition is overridden, but optionally warn this was a
1213 bad choice of name. */
1214 if (! TREE_PUBLIC (newdecl
))
1217 warning ("shadowing %s function `%#D'",
1218 DECL_BUILT_IN (olddecl
) ? "built-in" : "library",
1220 /* Discard the old built-in function. */
1223 /* If the built-in is not ansi, then programs can override
1224 it even globally without an error. */
1225 else if (! DECL_BUILT_IN (olddecl
))
1226 warning ("library function `%#D' redeclared as non-function `%#D'",
1230 error ("declaration of `%#D'", newdecl
);
1231 error ("conflicts with built-in declaration `%#D'",
1236 else if (!types_match
)
1238 /* Avoid warnings redeclaring anticipated built-ins. */
1239 if (DECL_ANTICIPATED (olddecl
))
1241 /* Deal with fileptr_type_node. FILE type is not known
1242 at the time we create the builtins. */
1245 for (t1
= TYPE_ARG_TYPES (TREE_TYPE (newdecl
)),
1246 t2
= TYPE_ARG_TYPES (TREE_TYPE (olddecl
));
1248 t1
= TREE_CHAIN (t1
), t2
= TREE_CHAIN (t2
))
1251 else if (TREE_VALUE (t2
) == fileptr_type_node
)
1253 tree t
= TREE_VALUE (t1
);
1255 if (TREE_CODE (t
) == POINTER_TYPE
1256 && TYPE_NAME (TREE_TYPE (t
))
1257 && DECL_NAME (TYPE_NAME (TREE_TYPE (t
)))
1258 == get_identifier ("FILE")
1259 && compparms (TREE_CHAIN (t1
), TREE_CHAIN (t2
)))
1261 tree oldargs
= TYPE_ARG_TYPES (TREE_TYPE (olddecl
));
1263 TYPE_ARG_TYPES (TREE_TYPE (olddecl
))
1264 = TYPE_ARG_TYPES (TREE_TYPE (newdecl
));
1265 types_match
= decls_match (newdecl
, olddecl
);
1267 return duplicate_decls (newdecl
, olddecl
);
1268 TYPE_ARG_TYPES (TREE_TYPE (olddecl
)) = oldargs
;
1271 else if (! same_type_p (TREE_VALUE (t1
), TREE_VALUE (t2
)))
1274 else if ((DECL_EXTERN_C_P (newdecl
)
1275 && DECL_EXTERN_C_P (olddecl
))
1276 || compparms (TYPE_ARG_TYPES (TREE_TYPE (newdecl
)),
1277 TYPE_ARG_TYPES (TREE_TYPE (olddecl
))))
1279 /* A near match; override the builtin. */
1281 if (TREE_PUBLIC (newdecl
))
1283 warning ("new declaration `%#D'", newdecl
);
1284 warning ("ambiguates built-in declaration `%#D'",
1287 else if (warn_shadow
)
1288 warning ("shadowing %s function `%#D'",
1289 DECL_BUILT_IN (olddecl
) ? "built-in" : "library",
1293 /* Discard the old built-in function. */
1296 /* Replace the old RTL to avoid problems with inlining. */
1297 COPY_DECL_RTL (newdecl
, olddecl
);
1299 /* Even if the types match, prefer the new declarations type
1300 for anticipated built-ins, for exception lists, etc... */
1301 else if (DECL_ANTICIPATED (olddecl
))
1303 tree type
= TREE_TYPE (newdecl
);
1304 tree attribs
= (*targetm
.merge_type_attributes
)
1305 (TREE_TYPE (olddecl
), type
);
1307 type
= cp_build_type_attribute_variant (type
, attribs
);
1308 TREE_TYPE (newdecl
) = TREE_TYPE (olddecl
) = type
;
1311 /* Whether or not the builtin can throw exceptions has no
1312 bearing on this declarator. */
1313 TREE_NOTHROW (olddecl
) = 0;
1315 if (DECL_THIS_STATIC (newdecl
) && !DECL_THIS_STATIC (olddecl
))
1317 /* If a builtin function is redeclared as `static', merge
1318 the declarations, but make the original one static. */
1319 DECL_THIS_STATIC (olddecl
) = 1;
1320 TREE_PUBLIC (olddecl
) = 0;
1322 /* Make the old declaration consistent with the new one so
1323 that all remnants of the builtin-ness of this function
1324 will be banished. */
1325 SET_DECL_LANGUAGE (olddecl
, DECL_LANGUAGE (newdecl
));
1326 COPY_DECL_RTL (newdecl
, olddecl
);
1329 else if (TREE_CODE (olddecl
) != TREE_CODE (newdecl
))
1331 if ((TREE_CODE (olddecl
) == TYPE_DECL
&& DECL_ARTIFICIAL (olddecl
)
1332 && TREE_CODE (newdecl
) != TYPE_DECL
1333 && ! (TREE_CODE (newdecl
) == TEMPLATE_DECL
1334 && TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) == TYPE_DECL
))
1335 || (TREE_CODE (newdecl
) == TYPE_DECL
&& DECL_ARTIFICIAL (newdecl
)
1336 && TREE_CODE (olddecl
) != TYPE_DECL
1337 && ! (TREE_CODE (olddecl
) == TEMPLATE_DECL
1338 && (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl
))
1341 /* We do nothing special here, because C++ does such nasty
1342 things with TYPE_DECLs. Instead, just let the TYPE_DECL
1343 get shadowed, and know that if we need to find a TYPE_DECL
1344 for a given name, we can look in the IDENTIFIER_TYPE_VALUE
1345 slot of the identifier. */
1349 if ((TREE_CODE (newdecl
) == FUNCTION_DECL
1350 && DECL_FUNCTION_TEMPLATE_P (olddecl
))
1351 || (TREE_CODE (olddecl
) == FUNCTION_DECL
1352 && DECL_FUNCTION_TEMPLATE_P (newdecl
)))
1355 error ("`%#D' redeclared as different kind of symbol", newdecl
);
1356 if (TREE_CODE (olddecl
) == TREE_LIST
)
1357 olddecl
= TREE_VALUE (olddecl
);
1358 cp_error_at ("previous declaration of `%#D'", olddecl
);
1360 return error_mark_node
;
1362 else if (!types_match
)
1364 if (CP_DECL_CONTEXT (newdecl
) != CP_DECL_CONTEXT (olddecl
))
1365 /* These are certainly not duplicate declarations; they're
1366 from different scopes. */
1369 if (TREE_CODE (newdecl
) == TEMPLATE_DECL
)
1371 /* The name of a class template may not be declared to refer to
1372 any other template, class, function, object, namespace, value,
1373 or type in the same scope. */
1374 if (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl
)) == TYPE_DECL
1375 || TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) == TYPE_DECL
)
1377 error ("declaration of template `%#D'", newdecl
);
1378 cp_error_at ("conflicts with previous declaration `%#D'",
1381 else if (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl
)) == FUNCTION_DECL
1382 && TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) == FUNCTION_DECL
1383 && compparms (TYPE_ARG_TYPES (TREE_TYPE (DECL_TEMPLATE_RESULT (olddecl
))),
1384 TYPE_ARG_TYPES (TREE_TYPE (DECL_TEMPLATE_RESULT (newdecl
))))
1385 && comp_template_parms (DECL_TEMPLATE_PARMS (newdecl
),
1386 DECL_TEMPLATE_PARMS (olddecl
))
1387 /* Template functions can be disambiguated by
1389 && same_type_p (TREE_TYPE (TREE_TYPE (newdecl
)),
1390 TREE_TYPE (TREE_TYPE (olddecl
))))
1392 error ("new declaration `%#D'", newdecl
);
1393 cp_error_at ("ambiguates old declaration `%#D'", olddecl
);
1397 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1399 if (DECL_EXTERN_C_P (newdecl
) && DECL_EXTERN_C_P (olddecl
))
1401 error ("declaration of C function `%#D' conflicts with",
1403 cp_error_at ("previous declaration `%#D' here", olddecl
);
1405 else if (compparms (TYPE_ARG_TYPES (TREE_TYPE (newdecl
)),
1406 TYPE_ARG_TYPES (TREE_TYPE (olddecl
))))
1408 error ("new declaration `%#D'", newdecl
);
1409 cp_error_at ("ambiguates old declaration `%#D'", olddecl
);
1416 error ("conflicting declaration '%#D'", newdecl
);
1417 cp_error_at ("'%D' has a previous declaration as `%#D'",
1422 else if (TREE_CODE (newdecl
) == FUNCTION_DECL
1423 && ((DECL_TEMPLATE_SPECIALIZATION (olddecl
)
1424 && (!DECL_TEMPLATE_INFO (newdecl
)
1425 || (DECL_TI_TEMPLATE (newdecl
)
1426 != DECL_TI_TEMPLATE (olddecl
))))
1427 || (DECL_TEMPLATE_SPECIALIZATION (newdecl
)
1428 && (!DECL_TEMPLATE_INFO (olddecl
)
1429 || (DECL_TI_TEMPLATE (olddecl
)
1430 != DECL_TI_TEMPLATE (newdecl
))))))
1431 /* It's OK to have a template specialization and a non-template
1432 with the same type, or to have specializations of two
1433 different templates with the same type. Note that if one is a
1434 specialization, and the other is an instantiation of the same
1435 template, that we do not exit at this point. That situation
1436 can occur if we instantiate a template class, and then
1437 specialize one of its methods. This situation is valid, but
1438 the declarations must be merged in the usual way. */
1440 else if (TREE_CODE (newdecl
) == FUNCTION_DECL
1441 && ((DECL_TEMPLATE_INSTANTIATION (olddecl
)
1442 && !DECL_USE_TEMPLATE (newdecl
))
1443 || (DECL_TEMPLATE_INSTANTIATION (newdecl
)
1444 && !DECL_USE_TEMPLATE (olddecl
))))
1445 /* One of the declarations is a template instantiation, and the
1446 other is not a template at all. That's OK. */
1448 else if (TREE_CODE (newdecl
) == NAMESPACE_DECL
)
1450 /* In [namespace.alias] we have:
1452 In a declarative region, a namespace-alias-definition can be
1453 used to redefine a namespace-alias declared in that declarative
1454 region to refer only to the namespace to which it already
1457 Therefore, if we encounter a second alias directive for the same
1458 alias, we can just ignore the second directive. */
1459 if (DECL_NAMESPACE_ALIAS (newdecl
)
1460 && (DECL_NAMESPACE_ALIAS (newdecl
)
1461 == DECL_NAMESPACE_ALIAS (olddecl
)))
1463 /* [namespace.alias]
1465 A namespace-name or namespace-alias shall not be declared as
1466 the name of any other entity in the same declarative region.
1467 A namespace-name defined at global scope shall not be
1468 declared as the name of any other entity in any global scope
1470 error ("declaration of `namespace %D' conflicts with", newdecl
);
1471 cp_error_at ("previous declaration of `namespace %D' here", olddecl
);
1472 return error_mark_node
;
1476 const char *errmsg
= redeclaration_error_message (newdecl
, olddecl
);
1479 error (errmsg
, newdecl
);
1480 if (DECL_NAME (olddecl
) != NULL_TREE
)
1481 cp_error_at ((DECL_INITIAL (olddecl
)
1482 && namespace_bindings_p ())
1483 ? "`%#D' previously defined here"
1484 : "`%#D' previously declared here", olddecl
);
1485 return error_mark_node
;
1487 else if (TREE_CODE (olddecl
) == FUNCTION_DECL
1488 && DECL_INITIAL (olddecl
) != NULL_TREE
1489 && TYPE_ARG_TYPES (TREE_TYPE (olddecl
)) == NULL_TREE
1490 && TYPE_ARG_TYPES (TREE_TYPE (newdecl
)) != NULL_TREE
)
1492 /* Prototype decl follows defn w/o prototype. */
1493 cp_warning_at ("prototype for `%#D'", newdecl
);
1494 warning ("%Jfollows non-prototype definition here", olddecl
);
1496 else if (TREE_CODE (olddecl
) == FUNCTION_DECL
1497 && DECL_LANGUAGE (newdecl
) != DECL_LANGUAGE (olddecl
))
1499 /* extern "C" int foo ();
1500 int foo () { bar (); }
1502 if (current_lang_depth () == 0)
1503 SET_DECL_LANGUAGE (newdecl
, DECL_LANGUAGE (olddecl
));
1506 cp_error_at ("previous declaration of `%#D' with %L linkage",
1507 olddecl
, DECL_LANGUAGE (olddecl
));
1508 error ("conflicts with new declaration with %L linkage",
1509 DECL_LANGUAGE (newdecl
));
1513 if (DECL_LANG_SPECIFIC (olddecl
) && DECL_USE_TEMPLATE (olddecl
))
1515 else if (TREE_CODE (olddecl
) == FUNCTION_DECL
)
1517 tree t1
= TYPE_ARG_TYPES (TREE_TYPE (olddecl
));
1518 tree t2
= TYPE_ARG_TYPES (TREE_TYPE (newdecl
));
1521 if (TREE_CODE (TREE_TYPE (newdecl
)) == METHOD_TYPE
)
1522 t1
= TREE_CHAIN (t1
), t2
= TREE_CHAIN (t2
);
1524 for (; t1
&& t1
!= void_list_node
;
1525 t1
= TREE_CHAIN (t1
), t2
= TREE_CHAIN (t2
), i
++)
1526 if (TREE_PURPOSE (t1
) && TREE_PURPOSE (t2
))
1528 if (1 == simple_cst_equal (TREE_PURPOSE (t1
),
1531 pedwarn ("default argument given for parameter %d of `%#D'",
1533 cp_pedwarn_at ("after previous specification in `%#D'",
1538 error ("default argument given for parameter %d of `%#D'",
1540 cp_error_at ("after previous specification in `%#D'",
1545 if (DECL_DECLARED_INLINE_P (newdecl
)
1546 && ! DECL_DECLARED_INLINE_P (olddecl
)
1547 && TREE_ADDRESSABLE (olddecl
) && warn_inline
)
1549 warning ("`%#D' was used before it was declared inline", newdecl
);
1550 warning ("%Jprevious non-inline declaration here", olddecl
);
1555 /* Do not merge an implicit typedef with an explicit one. In:
1559 typedef class A A __attribute__ ((foo));
1561 the attribute should apply only to the typedef. */
1562 if (TREE_CODE (olddecl
) == TYPE_DECL
1563 && (DECL_IMPLICIT_TYPEDEF_P (olddecl
)
1564 || DECL_IMPLICIT_TYPEDEF_P (newdecl
)))
1567 /* If new decl is `static' and an `extern' was seen previously,
1569 warn_extern_redeclared_static (newdecl
, olddecl
);
1571 /* We have committed to returning 1 at this point. */
1572 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1574 /* Now that functions must hold information normally held
1575 by field decls, there is extra work to do so that
1576 declaration information does not get destroyed during
1578 if (DECL_VINDEX (olddecl
))
1579 DECL_VINDEX (newdecl
) = DECL_VINDEX (olddecl
);
1580 if (DECL_CONTEXT (olddecl
))
1581 DECL_CONTEXT (newdecl
) = DECL_CONTEXT (olddecl
);
1582 DECL_STATIC_CONSTRUCTOR (newdecl
) |= DECL_STATIC_CONSTRUCTOR (olddecl
);
1583 DECL_STATIC_DESTRUCTOR (newdecl
) |= DECL_STATIC_DESTRUCTOR (olddecl
);
1584 DECL_PURE_VIRTUAL_P (newdecl
) |= DECL_PURE_VIRTUAL_P (olddecl
);
1585 DECL_VIRTUAL_P (newdecl
) |= DECL_VIRTUAL_P (olddecl
);
1586 DECL_THIS_STATIC (newdecl
) |= DECL_THIS_STATIC (olddecl
);
1587 if (DECL_OVERLOADED_OPERATOR_P (olddecl
) != ERROR_MARK
)
1588 SET_OVERLOADED_OPERATOR_CODE
1589 (newdecl
, DECL_OVERLOADED_OPERATOR_P (olddecl
));
1590 new_defines_function
= DECL_INITIAL (newdecl
) != NULL_TREE
;
1592 /* Optionally warn about more than one declaration for the same
1593 name, but don't warn about a function declaration followed by a
1595 if (warn_redundant_decls
&& ! DECL_ARTIFICIAL (olddecl
)
1596 && !(new_defines_function
&& DECL_INITIAL (olddecl
) == NULL_TREE
)
1597 /* Don't warn about extern decl followed by definition. */
1598 && !(DECL_EXTERNAL (olddecl
) && ! DECL_EXTERNAL (newdecl
))
1599 /* Don't warn about friends, let add_friend take care of it. */
1600 && ! (DECL_FRIEND_P (newdecl
) || DECL_FRIEND_P (olddecl
)))
1602 warning ("redundant redeclaration of `%D' in same scope", newdecl
);
1603 cp_warning_at ("previous declaration of `%D'", olddecl
);
1607 /* Deal with C++: must preserve virtual function table size. */
1608 if (TREE_CODE (olddecl
) == TYPE_DECL
)
1610 tree newtype
= TREE_TYPE (newdecl
);
1611 tree oldtype
= TREE_TYPE (olddecl
);
1613 if (newtype
!= error_mark_node
&& oldtype
!= error_mark_node
1614 && TYPE_LANG_SPECIFIC (newtype
) && TYPE_LANG_SPECIFIC (oldtype
))
1615 CLASSTYPE_FRIEND_CLASSES (newtype
)
1616 = CLASSTYPE_FRIEND_CLASSES (oldtype
);
1618 DECL_ORIGINAL_TYPE (newdecl
) = DECL_ORIGINAL_TYPE (olddecl
);
1621 /* Copy all the DECL_... slots specified in the new decl
1622 except for any that we copy here from the old type. */
1623 DECL_ATTRIBUTES (newdecl
)
1624 = (*targetm
.merge_decl_attributes
) (olddecl
, newdecl
);
1626 if (TREE_CODE (newdecl
) == TEMPLATE_DECL
)
1628 TREE_TYPE (olddecl
) = TREE_TYPE (DECL_TEMPLATE_RESULT (olddecl
));
1629 DECL_TEMPLATE_SPECIALIZATIONS (olddecl
)
1630 = chainon (DECL_TEMPLATE_SPECIALIZATIONS (olddecl
),
1631 DECL_TEMPLATE_SPECIALIZATIONS (newdecl
));
1633 /* If the new declaration is a definition, update the file and
1634 line information on the declaration. */
1635 if (DECL_INITIAL (DECL_TEMPLATE_RESULT (olddecl
)) == NULL_TREE
1636 && DECL_INITIAL (DECL_TEMPLATE_RESULT (newdecl
)) != NULL_TREE
)
1638 DECL_SOURCE_LOCATION (olddecl
)
1639 = DECL_SOURCE_LOCATION (DECL_TEMPLATE_RESULT (olddecl
))
1640 = DECL_SOURCE_LOCATION (newdecl
);
1641 if (DECL_FUNCTION_TEMPLATE_P (newdecl
))
1642 DECL_ARGUMENTS (DECL_TEMPLATE_RESULT (olddecl
))
1643 = DECL_ARGUMENTS (DECL_TEMPLATE_RESULT (newdecl
));
1646 if (DECL_FUNCTION_TEMPLATE_P (newdecl
))
1648 DECL_INLINE (DECL_TEMPLATE_RESULT (olddecl
))
1649 |= DECL_INLINE (DECL_TEMPLATE_RESULT (newdecl
));
1650 DECL_DECLARED_INLINE_P (DECL_TEMPLATE_RESULT (olddecl
))
1651 |= DECL_DECLARED_INLINE_P (DECL_TEMPLATE_RESULT (newdecl
));
1659 /* Automatically handles default parameters. */
1660 tree oldtype
= TREE_TYPE (olddecl
);
1663 /* Merge the data types specified in the two decls. */
1664 newtype
= merge_types (TREE_TYPE (newdecl
), TREE_TYPE (olddecl
));
1666 /* If merge_types produces a non-typedef type, just use the old type. */
1667 if (TREE_CODE (newdecl
) == TYPE_DECL
1668 && newtype
== DECL_ORIGINAL_TYPE (newdecl
))
1671 if (TREE_CODE (newdecl
) == VAR_DECL
)
1673 DECL_THIS_EXTERN (newdecl
) |= DECL_THIS_EXTERN (olddecl
);
1674 DECL_INITIALIZED_P (newdecl
) |= DECL_INITIALIZED_P (olddecl
);
1675 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (newdecl
)
1676 |= DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (olddecl
);
1679 /* Do this after calling `merge_types' so that default
1680 parameters don't confuse us. */
1681 else if (TREE_CODE (newdecl
) == FUNCTION_DECL
1682 && (TYPE_RAISES_EXCEPTIONS (TREE_TYPE (newdecl
))
1683 != TYPE_RAISES_EXCEPTIONS (TREE_TYPE (olddecl
))))
1685 TREE_TYPE (newdecl
) = build_exception_variant (newtype
,
1686 TYPE_RAISES_EXCEPTIONS (TREE_TYPE (newdecl
)));
1687 TREE_TYPE (olddecl
) = build_exception_variant (newtype
,
1688 TYPE_RAISES_EXCEPTIONS (oldtype
));
1690 if ((pedantic
|| ! DECL_IN_SYSTEM_HEADER (olddecl
))
1691 && ! DECL_IS_BUILTIN (olddecl
)
1693 && !comp_except_specs (TYPE_RAISES_EXCEPTIONS (TREE_TYPE (newdecl
)),
1694 TYPE_RAISES_EXCEPTIONS (TREE_TYPE (olddecl
)), 1))
1696 error ("declaration of `%F' throws different exceptions",
1698 cp_error_at ("than previous declaration `%F'", olddecl
);
1701 TREE_TYPE (newdecl
) = TREE_TYPE (olddecl
) = newtype
;
1703 /* Lay the type out, unless already done. */
1704 if (! same_type_p (newtype
, oldtype
)
1705 && TREE_TYPE (newdecl
) != error_mark_node
1706 && !(processing_template_decl
&& uses_template_parms (newdecl
)))
1707 layout_type (TREE_TYPE (newdecl
));
1709 if ((TREE_CODE (newdecl
) == VAR_DECL
1710 || TREE_CODE (newdecl
) == PARM_DECL
1711 || TREE_CODE (newdecl
) == RESULT_DECL
1712 || TREE_CODE (newdecl
) == FIELD_DECL
1713 || TREE_CODE (newdecl
) == TYPE_DECL
)
1714 && !(processing_template_decl
&& uses_template_parms (newdecl
)))
1715 layout_decl (newdecl
, 0);
1717 /* Merge the type qualifiers. */
1718 if (TREE_READONLY (newdecl
))
1719 TREE_READONLY (olddecl
) = 1;
1720 if (TREE_THIS_VOLATILE (newdecl
))
1721 TREE_THIS_VOLATILE (olddecl
) = 1;
1722 if (TREE_NOTHROW (newdecl
))
1723 TREE_NOTHROW (olddecl
) = 1;
1725 /* Merge the initialization information. */
1726 if (DECL_INITIAL (newdecl
) == NULL_TREE
1727 && DECL_INITIAL (olddecl
) != NULL_TREE
)
1729 DECL_INITIAL (newdecl
) = DECL_INITIAL (olddecl
);
1730 DECL_SOURCE_LOCATION (newdecl
) = DECL_SOURCE_LOCATION (olddecl
);
1731 if (CAN_HAVE_FULL_LANG_DECL_P (newdecl
)
1732 && DECL_LANG_SPECIFIC (newdecl
)
1733 && DECL_LANG_SPECIFIC (olddecl
))
1735 DECL_SAVED_TREE (newdecl
) = DECL_SAVED_TREE (olddecl
);
1736 DECL_STRUCT_FUNCTION (newdecl
) = DECL_STRUCT_FUNCTION (olddecl
);
1740 /* Merge the section attribute.
1741 We want to issue an error if the sections conflict but that must be
1742 done later in decl_attributes since we are called before attributes
1744 if (DECL_SECTION_NAME (newdecl
) == NULL_TREE
)
1745 DECL_SECTION_NAME (newdecl
) = DECL_SECTION_NAME (olddecl
);
1747 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1749 DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (newdecl
)
1750 |= DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (olddecl
);
1751 DECL_NO_LIMIT_STACK (newdecl
) |= DECL_NO_LIMIT_STACK (olddecl
);
1752 TREE_THIS_VOLATILE (newdecl
) |= TREE_THIS_VOLATILE (olddecl
);
1753 TREE_READONLY (newdecl
) |= TREE_READONLY (olddecl
);
1754 TREE_NOTHROW (newdecl
) |= TREE_NOTHROW (olddecl
);
1755 DECL_IS_MALLOC (newdecl
) |= DECL_IS_MALLOC (olddecl
);
1756 DECL_IS_PURE (newdecl
) |= DECL_IS_PURE (olddecl
);
1757 /* Keep the old RTL. */
1758 COPY_DECL_RTL (olddecl
, newdecl
);
1760 else if (TREE_CODE (newdecl
) == VAR_DECL
1761 && (DECL_SIZE (olddecl
) || !DECL_SIZE (newdecl
)))
1763 /* Keep the old RTL. We cannot keep the old RTL if the old
1764 declaration was for an incomplete object and the new
1765 declaration is not since many attributes of the RTL will
1767 COPY_DECL_RTL (olddecl
, newdecl
);
1770 /* If cannot merge, then use the new type and qualifiers,
1771 and don't preserve the old rtl. */
1774 /* Clean out any memory we had of the old declaration. */
1775 tree oldstatic
= value_member (olddecl
, static_aggregates
);
1777 TREE_VALUE (oldstatic
) = error_mark_node
;
1779 TREE_TYPE (olddecl
) = TREE_TYPE (newdecl
);
1780 TREE_READONLY (olddecl
) = TREE_READONLY (newdecl
);
1781 TREE_THIS_VOLATILE (olddecl
) = TREE_THIS_VOLATILE (newdecl
);
1782 TREE_SIDE_EFFECTS (olddecl
) = TREE_SIDE_EFFECTS (newdecl
);
1785 /* Merge the storage class information. */
1786 merge_weak (newdecl
, olddecl
);
1788 DECL_ONE_ONLY (newdecl
) |= DECL_ONE_ONLY (olddecl
);
1789 DECL_DEFER_OUTPUT (newdecl
) |= DECL_DEFER_OUTPUT (olddecl
);
1790 TREE_PUBLIC (newdecl
) = TREE_PUBLIC (olddecl
);
1791 TREE_STATIC (olddecl
) = TREE_STATIC (newdecl
) |= TREE_STATIC (olddecl
);
1792 if (! DECL_EXTERNAL (olddecl
))
1793 DECL_EXTERNAL (newdecl
) = 0;
1795 if (DECL_LANG_SPECIFIC (newdecl
) && DECL_LANG_SPECIFIC (olddecl
))
1797 DECL_INTERFACE_KNOWN (newdecl
) |= DECL_INTERFACE_KNOWN (olddecl
);
1798 DECL_NOT_REALLY_EXTERN (newdecl
) |= DECL_NOT_REALLY_EXTERN (olddecl
);
1799 DECL_COMDAT (newdecl
) |= DECL_COMDAT (olddecl
);
1800 DECL_TEMPLATE_INSTANTIATED (newdecl
)
1801 |= DECL_TEMPLATE_INSTANTIATED (olddecl
);
1802 /* Don't really know how much of the language-specific
1803 values we should copy from old to new. */
1804 DECL_IN_AGGR_P (newdecl
) = DECL_IN_AGGR_P (olddecl
);
1805 DECL_LANG_SPECIFIC (newdecl
)->decl_flags
.u2
=
1806 DECL_LANG_SPECIFIC (olddecl
)->decl_flags
.u2
;
1807 DECL_NONCONVERTING_P (newdecl
) = DECL_NONCONVERTING_P (olddecl
);
1808 DECL_REPO_AVAILABLE_P (newdecl
) = DECL_REPO_AVAILABLE_P (olddecl
);
1809 DECL_TEMPLATE_INFO (newdecl
) = DECL_TEMPLATE_INFO (olddecl
);
1810 DECL_INITIALIZED_IN_CLASS_P (newdecl
)
1811 |= DECL_INITIALIZED_IN_CLASS_P (olddecl
);
1812 olddecl_friend
= DECL_FRIEND_P (olddecl
);
1814 /* Only functions have DECL_BEFRIENDING_CLASSES. */
1815 if (TREE_CODE (newdecl
) == FUNCTION_DECL
1816 || DECL_FUNCTION_TEMPLATE_P (newdecl
))
1818 DECL_BEFRIENDING_CLASSES (newdecl
)
1819 = chainon (DECL_BEFRIENDING_CLASSES (newdecl
),
1820 DECL_BEFRIENDING_CLASSES (olddecl
));
1821 /* DECL_THUNKS is only valid for virtual functions,
1822 otherwise it is a DECL_FRIEND_CONTEXT. */
1823 if (DECL_VIRTUAL_P (newdecl
))
1824 DECL_THUNKS (newdecl
) = DECL_THUNKS (olddecl
);
1828 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1830 if (DECL_TEMPLATE_INSTANTIATION (olddecl
)
1831 && !DECL_TEMPLATE_INSTANTIATION (newdecl
))
1833 /* If newdecl is not a specialization, then it is not a
1834 template-related function at all. And that means that we
1835 should have exited above, returning 0. */
1836 gcc_assert (DECL_TEMPLATE_SPECIALIZATION (newdecl
));
1838 if (TREE_USED (olddecl
))
1839 /* From [temp.expl.spec]:
1841 If a template, a member template or the member of a class
1842 template is explicitly specialized then that
1843 specialization shall be declared before the first use of
1844 that specialization that would cause an implicit
1845 instantiation to take place, in every translation unit in
1846 which such a use occurs. */
1847 error ("explicit specialization of %D after first use",
1850 SET_DECL_TEMPLATE_SPECIALIZATION (olddecl
);
1852 /* [temp.expl.spec/14] We don't inline explicit specialization
1853 just because the primary template says so. */
1857 if (DECL_PENDING_INLINE_INFO (newdecl
) == 0)
1858 DECL_PENDING_INLINE_INFO (newdecl
) = DECL_PENDING_INLINE_INFO (olddecl
);
1860 DECL_DECLARED_INLINE_P (newdecl
) |= DECL_DECLARED_INLINE_P (olddecl
);
1862 /* If either decl says `inline', this fn is inline, unless
1863 its definition was passed already. */
1864 if (DECL_INLINE (newdecl
) && DECL_INITIAL (olddecl
) == NULL_TREE
)
1865 DECL_INLINE (olddecl
) = 1;
1866 DECL_INLINE (newdecl
) = DECL_INLINE (olddecl
);
1868 DECL_UNINLINABLE (newdecl
) = DECL_UNINLINABLE (olddecl
)
1869 = (DECL_UNINLINABLE (newdecl
) || DECL_UNINLINABLE (olddecl
));
1872 /* Preserve abstractness on cloned [cd]tors. */
1873 DECL_ABSTRACT (newdecl
) = DECL_ABSTRACT (olddecl
);
1877 SET_DECL_LANGUAGE (olddecl
, DECL_LANGUAGE (newdecl
));
1878 COPY_DECL_ASSEMBLER_NAME (newdecl
, olddecl
);
1879 COPY_DECL_RTL (newdecl
, olddecl
);
1881 if (! types_match
|| new_defines_function
)
1883 /* These need to be copied so that the names are available.
1884 Note that if the types do match, we'll preserve inline
1885 info and other bits, but if not, we won't. */
1886 DECL_ARGUMENTS (olddecl
) = DECL_ARGUMENTS (newdecl
);
1887 DECL_RESULT (olddecl
) = DECL_RESULT (newdecl
);
1889 if (new_defines_function
)
1890 /* If defining a function declared with other language
1891 linkage, use the previously declared language linkage. */
1892 SET_DECL_LANGUAGE (newdecl
, DECL_LANGUAGE (olddecl
));
1893 else if (types_match
)
1895 /* If redeclaring a builtin function, and not a definition,
1896 it stays built in. */
1897 if (DECL_BUILT_IN (olddecl
))
1899 DECL_BUILT_IN_CLASS (newdecl
) = DECL_BUILT_IN_CLASS (olddecl
);
1900 DECL_FUNCTION_CODE (newdecl
) = DECL_FUNCTION_CODE (olddecl
);
1901 /* If we're keeping the built-in definition, keep the rtl,
1902 regardless of declaration matches. */
1903 COPY_DECL_RTL (olddecl
, newdecl
);
1906 DECL_RESULT (newdecl
) = DECL_RESULT (olddecl
);
1907 /* Don't clear out the arguments if we're redefining a function. */
1908 if (DECL_ARGUMENTS (olddecl
))
1909 DECL_ARGUMENTS (newdecl
) = DECL_ARGUMENTS (olddecl
);
1912 else if (TREE_CODE (newdecl
) == NAMESPACE_DECL
)
1913 NAMESPACE_LEVEL (newdecl
) = NAMESPACE_LEVEL (olddecl
);
1915 /* Now preserve various other info from the definition. */
1916 TREE_ADDRESSABLE (newdecl
) = TREE_ADDRESSABLE (olddecl
);
1917 TREE_ASM_WRITTEN (newdecl
) = TREE_ASM_WRITTEN (olddecl
);
1918 DECL_COMMON (newdecl
) = DECL_COMMON (olddecl
);
1919 COPY_DECL_ASSEMBLER_NAME (olddecl
, newdecl
);
1921 /* Warn about conflicting visibility specifications. */
1922 if (DECL_VISIBILITY_SPECIFIED (olddecl
)
1923 && DECL_VISIBILITY_SPECIFIED (newdecl
)
1924 && DECL_VISIBILITY (newdecl
) != DECL_VISIBILITY (olddecl
))
1926 warning ("%J'%D': visibility attribute ignored because it",
1928 warning ("%Jconflicts with previous declaration here", olddecl
);
1930 /* Choose the declaration which specified visibility. */
1931 if (DECL_VISIBILITY_SPECIFIED (olddecl
))
1933 DECL_VISIBILITY (newdecl
) = DECL_VISIBILITY (olddecl
);
1934 DECL_VISIBILITY_SPECIFIED (newdecl
) = 1;
1937 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1941 function_size
= sizeof (struct tree_decl
);
1943 memcpy ((char *) olddecl
+ sizeof (struct tree_common
),
1944 (char *) newdecl
+ sizeof (struct tree_common
),
1945 function_size
- sizeof (struct tree_common
));
1947 if (DECL_TEMPLATE_INSTANTIATION (newdecl
))
1948 /* If newdecl is a template instantiation, it is possible that
1949 the following sequence of events has occurred:
1951 o A friend function was declared in a class template. The
1952 class template was instantiated.
1954 o The instantiation of the friend declaration was
1955 recorded on the instantiation list, and is newdecl.
1957 o Later, however, instantiate_class_template called pushdecl
1958 on the newdecl to perform name injection. But, pushdecl in
1959 turn called duplicate_decls when it discovered that another
1960 declaration of a global function with the same name already
1963 o Here, in duplicate_decls, we decided to clobber newdecl.
1965 If we're going to do that, we'd better make sure that
1966 olddecl, and not newdecl, is on the list of
1967 instantiations so that if we try to do the instantiation
1968 again we won't get the clobbered declaration. */
1969 reregister_specialization (newdecl
,
1970 DECL_TI_TEMPLATE (newdecl
),
1975 memcpy ((char *) olddecl
+ sizeof (struct tree_common
),
1976 (char *) newdecl
+ sizeof (struct tree_common
),
1977 sizeof (struct tree_decl
) - sizeof (struct tree_common
)
1978 + TREE_CODE_LENGTH (TREE_CODE (newdecl
)) * sizeof (char *));
1981 DECL_UID (olddecl
) = olddecl_uid
;
1983 DECL_FRIEND_P (olddecl
) = 1;
1985 /* NEWDECL contains the merged attribute lists.
1986 Update OLDDECL to be the same. */
1987 DECL_ATTRIBUTES (olddecl
) = DECL_ATTRIBUTES (newdecl
);
1989 /* If OLDDECL had its DECL_RTL instantiated, re-invoke make_decl_rtl
1990 so that encode_section_info has a chance to look at the new decl
1991 flags and attributes. */
1992 if (DECL_RTL_SET_P (olddecl
)
1993 && (TREE_CODE (olddecl
) == FUNCTION_DECL
1994 || (TREE_CODE (olddecl
) == VAR_DECL
1995 && TREE_STATIC (olddecl
))))
1996 make_decl_rtl (olddecl
);
2001 /* Return zero if the declaration NEWDECL is valid
2002 when the declaration OLDDECL (assumed to be for the same name)
2003 has already been seen.
2004 Otherwise return an error message format string with a %s
2005 where the identifier should go. */
2008 redeclaration_error_message (tree newdecl
, tree olddecl
)
2010 if (TREE_CODE (newdecl
) == TYPE_DECL
)
2012 /* Because C++ can put things into name space for free,
2013 constructs like "typedef struct foo { ... } foo"
2014 would look like an erroneous redeclaration. */
2015 if (same_type_p (TREE_TYPE (newdecl
), TREE_TYPE (olddecl
)))
2018 return "redefinition of `%#D'";
2020 else if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
2022 /* If this is a pure function, its olddecl will actually be
2023 the original initialization to `0' (which we force to call
2024 abort()). Don't complain about redefinition in this case. */
2025 if (DECL_LANG_SPECIFIC (olddecl
) && DECL_PURE_VIRTUAL_P (olddecl
))
2028 /* If both functions come from different namespaces, this is not
2029 a redeclaration - this is a conflict with a used function. */
2030 if (DECL_NAMESPACE_SCOPE_P (olddecl
)
2031 && DECL_CONTEXT (olddecl
) != DECL_CONTEXT (newdecl
))
2032 return "`%D' conflicts with used function";
2034 /* We'll complain about linkage mismatches in
2035 warn_extern_redeclared_static. */
2037 /* Defining the same name twice is no good. */
2038 if (DECL_INITIAL (olddecl
) != NULL_TREE
2039 && DECL_INITIAL (newdecl
) != NULL_TREE
)
2041 if (DECL_NAME (olddecl
) == NULL_TREE
)
2042 return "`%#D' not declared in class";
2044 return "redefinition of `%#D'";
2048 else if (TREE_CODE (newdecl
) == TEMPLATE_DECL
)
2052 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) == TYPE_DECL
)
2054 if (COMPLETE_TYPE_P (TREE_TYPE (newdecl
))
2055 && COMPLETE_TYPE_P (TREE_TYPE (olddecl
)))
2056 return "redefinition of `%#D'";
2060 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) != FUNCTION_DECL
2061 || (DECL_TEMPLATE_RESULT (newdecl
)
2062 == DECL_TEMPLATE_RESULT (olddecl
)))
2065 nt
= DECL_TEMPLATE_RESULT (newdecl
);
2066 if (DECL_TEMPLATE_INFO (nt
))
2067 nt
= DECL_TEMPLATE_RESULT (template_for_substitution (nt
));
2068 ot
= DECL_TEMPLATE_RESULT (olddecl
);
2069 if (DECL_TEMPLATE_INFO (ot
))
2070 ot
= DECL_TEMPLATE_RESULT (template_for_substitution (ot
));
2071 if (DECL_INITIAL (nt
) && DECL_INITIAL (ot
))
2072 return "redefinition of `%#D'";
2076 else if (toplevel_bindings_p () || DECL_NAMESPACE_SCOPE_P (newdecl
))
2078 /* Objects declared at top level: */
2079 /* If at least one is a reference, it's ok. */
2080 if (DECL_EXTERNAL (newdecl
) || DECL_EXTERNAL (olddecl
))
2082 /* Reject two definitions. */
2083 return "redefinition of `%#D'";
2087 /* Objects declared with block scope: */
2088 /* Reject two definitions, and reject a definition
2089 together with an external reference. */
2090 if (!(DECL_EXTERNAL (newdecl
) && DECL_EXTERNAL (olddecl
)))
2091 return "redeclaration of `%#D'";
2096 /* Create a new label, named ID. */
2099 make_label_decl (tree id
, int local_p
)
2103 decl
= build_decl (LABEL_DECL
, id
, void_type_node
);
2105 DECL_CONTEXT (decl
) = current_function_decl
;
2106 DECL_MODE (decl
) = VOIDmode
;
2107 C_DECLARED_LABEL_FLAG (decl
) = local_p
;
2109 /* Say where one reference is to the label, for the sake of the
2110 error if it is not defined. */
2111 DECL_SOURCE_LOCATION (decl
) = input_location
;
2113 /* Record the fact that this identifier is bound to this label. */
2114 SET_IDENTIFIER_LABEL_VALUE (id
, decl
);
2119 /* Record this label on the list of used labels so that we can check
2120 at the end of the function to see whether or not the label was
2121 actually defined, and so we can check when the label is defined whether
2122 this use is valid. */
2125 use_label (tree decl
)
2127 if (named_label_uses
== NULL
2128 || named_label_uses
->names_in_scope
!= current_binding_level
->names
2129 || named_label_uses
->label_decl
!= decl
)
2131 struct named_label_use_list
*new_ent
;
2132 new_ent
= GGC_NEW (struct named_label_use_list
);
2133 new_ent
->label_decl
= decl
;
2134 new_ent
->names_in_scope
= current_binding_level
->names
;
2135 new_ent
->binding_level
= current_binding_level
;
2136 new_ent
->o_goto_locus
= input_location
;
2137 new_ent
->next
= named_label_uses
;
2138 named_label_uses
= new_ent
;
2142 /* Look for a label named ID in the current function. If one cannot
2143 be found, create one. (We keep track of used, but undefined,
2144 labels, and complain about them at the end of a function.) */
2147 lookup_label (tree id
)
2150 struct named_label_list
*ent
;
2152 timevar_push (TV_NAME_LOOKUP
);
2153 /* You can't use labels at global scope. */
2154 if (current_function_decl
== NULL_TREE
)
2156 error ("label `%E' referenced outside of any function", id
);
2157 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP
, NULL_TREE
);
2160 /* See if we've already got this label. */
2161 decl
= IDENTIFIER_LABEL_VALUE (id
);
2162 if (decl
!= NULL_TREE
&& DECL_CONTEXT (decl
) == current_function_decl
)
2163 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP
, decl
);
2165 /* Record this label on the list of labels used in this function.
2166 We do this before calling make_label_decl so that we get the
2167 IDENTIFIER_LABEL_VALUE before the new label is declared. */
2168 ent
= GGC_CNEW (struct named_label_list
);
2169 ent
->old_value
= IDENTIFIER_LABEL_VALUE (id
);
2170 ent
->next
= named_labels
;
2173 /* We need a new label. */
2174 decl
= make_label_decl (id
, /*local_p=*/0);
2176 /* Now fill in the information we didn't have before. */
2177 ent
->label_decl
= decl
;
2179 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP
, decl
);
2182 /* Declare a local label named ID. */
2185 declare_local_label (tree id
)
2189 /* Add a new entry to the SHADOWED_LABELS list so that when we leave
2190 this scope we can restore the old value of
2191 IDENTIFIER_TYPE_VALUE. */
2192 current_binding_level
->shadowed_labels
2193 = tree_cons (IDENTIFIER_LABEL_VALUE (id
), NULL_TREE
,
2194 current_binding_level
->shadowed_labels
);
2195 /* Look for the label. */
2196 decl
= make_label_decl (id
, /*local_p=*/1);
2197 /* Now fill in the information we didn't have before. */
2198 TREE_VALUE (current_binding_level
->shadowed_labels
) = decl
;
2203 /* Returns nonzero if it is ill-formed to jump past the declaration of
2204 DECL. Returns 2 if it's also a real problem. */
2207 decl_jump_unsafe (tree decl
)
2209 if (TREE_CODE (decl
) != VAR_DECL
|| TREE_STATIC (decl
))
2212 if (DECL_INITIAL (decl
) == NULL_TREE
2213 && pod_type_p (TREE_TYPE (decl
)))
2216 /* This is really only important if we're crossing an initialization.
2217 The POD stuff is just pedantry; why should it matter if the class
2218 contains a field of pointer to member type? */
2219 if (DECL_INITIAL (decl
)
2220 || (TYPE_NEEDS_CONSTRUCTING (TREE_TYPE (decl
))))
2225 /* Check that a single previously seen jump to a newly defined label
2226 is OK. DECL is the LABEL_DECL or 0; LEVEL is the binding_level for
2227 the jump context; NAMES are the names in scope in LEVEL at the jump
2228 context; FILE and LINE are the source position of the jump or 0. */
2231 check_previous_goto_1 (tree decl
,
2232 struct cp_binding_level
* level
,
2233 tree names
, const location_t
*locus
)
2237 struct cp_binding_level
*b
= current_binding_level
;
2238 for (; b
; b
= b
->level_chain
)
2240 tree new_decls
= b
->names
;
2241 tree old_decls
= (b
== level
? names
: NULL_TREE
);
2242 for (; new_decls
!= old_decls
;
2243 new_decls
= TREE_CHAIN (new_decls
))
2245 int problem
= decl_jump_unsafe (new_decls
);
2252 pedwarn ("jump to label `%D'", decl
);
2254 pedwarn ("jump to case label");
2257 pedwarn ("%H from here", locus
);
2262 cp_error_at (" crosses initialization of `%#D'",
2265 cp_pedwarn_at (" enters scope of non-POD `%#D'",
2271 if ((b
->kind
== sk_try
|| b
->kind
== sk_catch
) && ! saw_eh
)
2276 pedwarn ("jump to label `%D'", decl
);
2278 pedwarn ("jump to case label");
2281 pedwarn ("%H from here", locus
);
2284 if (b
->kind
== sk_try
)
2285 error (" enters try block");
2287 error (" enters catch block");
2294 check_previous_goto (struct named_label_use_list
* use
)
2296 check_previous_goto_1 (use
->label_decl
, use
->binding_level
,
2297 use
->names_in_scope
, &use
->o_goto_locus
);
2301 check_switch_goto (struct cp_binding_level
* level
)
2303 check_previous_goto_1 (NULL_TREE
, level
, level
->names
, NULL
);
2306 /* Check that any previously seen jumps to a newly defined label DECL
2307 are OK. Called by define_label. */
2310 check_previous_gotos (tree decl
)
2312 struct named_label_use_list
**usep
;
2314 if (! TREE_USED (decl
))
2317 for (usep
= &named_label_uses
; *usep
; )
2319 struct named_label_use_list
*use
= *usep
;
2320 if (use
->label_decl
== decl
)
2322 check_previous_goto (use
);
2326 usep
= &(use
->next
);
2330 /* Check that a new jump to a label DECL is OK. Called by
2331 finish_goto_stmt. */
2334 check_goto (tree decl
)
2338 struct named_label_list
*lab
;
2340 /* We can't know where a computed goto is jumping. So we assume
2342 if (! DECL_P (decl
))
2345 /* If the label hasn't been defined yet, defer checking. */
2346 if (! DECL_INITIAL (decl
))
2352 for (lab
= named_labels
; lab
; lab
= lab
->next
)
2353 if (decl
== lab
->label_decl
)
2356 /* If the label is not on named_labels it's a gcc local label, so
2357 it must be in an outer scope, so jumping to it is always OK. */
2361 if ((lab
->in_try_scope
|| lab
->in_catch_scope
|| lab
->bad_decls
)
2364 cp_pedwarn_at ("jump to label `%D'", decl
);
2365 pedwarn (" from here");
2369 for (bad
= lab
->bad_decls
; bad
; bad
= TREE_CHAIN (bad
))
2371 tree b
= TREE_VALUE (bad
);
2372 int u
= decl_jump_unsafe (b
);
2374 if (u
> 1 && DECL_ARTIFICIAL (b
))
2375 /* Can't skip init of __exception_info. */
2376 error ("%J enters catch block", b
);
2378 cp_error_at (" skips initialization of `%#D'", b
);
2380 cp_pedwarn_at (" enters scope of non-POD `%#D'", b
);
2383 if (lab
->in_try_scope
)
2384 error (" enters try block");
2385 else if (lab
->in_catch_scope
)
2386 error (" enters catch block");
2389 /* Define a label, specifying the location in the source file.
2390 Return the LABEL_DECL node for the label. */
2393 define_label (location_t location
, tree name
)
2395 tree decl
= lookup_label (name
);
2396 struct named_label_list
*ent
;
2397 struct cp_binding_level
*p
;
2399 timevar_push (TV_NAME_LOOKUP
);
2400 for (ent
= named_labels
; ent
; ent
= ent
->next
)
2401 if (ent
->label_decl
== decl
)
2404 /* After labels, make any new cleanups in the function go into their
2405 own new (temporary) binding contour. */
2406 for (p
= current_binding_level
;
2407 p
->kind
!= sk_function_parms
;
2409 p
->more_cleanups_ok
= 0;
2411 if (name
== get_identifier ("wchar_t"))
2412 pedwarn ("label named wchar_t");
2414 if (DECL_INITIAL (decl
) != NULL_TREE
)
2415 error ("duplicate label `%D'", decl
);
2418 /* Mark label as having been defined. */
2419 DECL_INITIAL (decl
) = error_mark_node
;
2420 /* Say where in the source. */
2421 DECL_SOURCE_LOCATION (decl
) = location
;
2424 ent
->names_in_scope
= current_binding_level
->names
;
2425 ent
->binding_level
= current_binding_level
;
2427 check_previous_gotos (decl
);
2430 timevar_pop (TV_NAME_LOOKUP
);
2436 struct cp_binding_level
*level
;
2437 struct cp_switch
*next
;
2438 /* The SWITCH_STMT being built. */
2440 /* A splay-tree mapping the low element of a case range to the high
2441 element, or NULL_TREE if there is no high element. Used to
2442 determine whether or not a new case label duplicates an old case
2443 label. We need a tree, rather than simply a hash table, because
2444 of the GNU case range extension. */
2448 /* A stack of the currently active switch statements. The innermost
2449 switch statement is on the top of the stack. There is no need to
2450 mark the stack for garbage collection because it is only active
2451 during the processing of the body of a function, and we never
2452 collect at that point. */
2454 static struct cp_switch
*switch_stack
;
2456 /* Called right after a switch-statement condition is parsed.
2457 SWITCH_STMT is the switch statement being parsed. */
2460 push_switch (tree switch_stmt
)
2462 struct cp_switch
*p
= xmalloc (sizeof (struct cp_switch
));
2463 p
->level
= current_binding_level
;
2464 p
->next
= switch_stack
;
2465 p
->switch_stmt
= switch_stmt
;
2466 p
->cases
= splay_tree_new (case_compare
, NULL
, NULL
);
2473 struct cp_switch
*cs
= switch_stack
;
2475 /* Emit warnings as needed. */
2476 c_do_switch_warnings (cs
->cases
, cs
->switch_stmt
);
2478 splay_tree_delete (cs
->cases
);
2479 switch_stack
= switch_stack
->next
;
2483 /* Note that we've seen a definition of a case label, and complain if this
2484 is a bad place for one. */
2487 finish_case_label (tree low_value
, tree high_value
)
2490 struct cp_binding_level
*p
;
2492 if (processing_template_decl
)
2496 /* For templates, just add the case label; we'll do semantic
2497 analysis at instantiation-time. */
2498 label
= build_decl (LABEL_DECL
, NULL_TREE
, NULL_TREE
);
2499 return add_stmt (build_case_label (low_value
, high_value
, label
));
2502 /* Find the condition on which this switch statement depends. */
2503 cond
= SWITCH_COND (switch_stack
->switch_stmt
);
2504 if (cond
&& TREE_CODE (cond
) == TREE_LIST
)
2505 cond
= TREE_VALUE (cond
);
2507 r
= c_add_case_label (switch_stack
->cases
, cond
, TREE_TYPE (cond
),
2508 low_value
, high_value
);
2510 check_switch_goto (switch_stack
->level
);
2512 /* After labels, make any new cleanups in the function go into their
2513 own new (temporary) binding contour. */
2514 for (p
= current_binding_level
;
2515 p
->kind
!= sk_function_parms
;
2517 p
->more_cleanups_ok
= 0;
2522 /* Hash a TYPENAME_TYPE. K is really of type `tree'. */
2525 typename_hash (const void* k
)
2530 hash
= (htab_hash_pointer (TYPE_CONTEXT (t
))
2531 ^ htab_hash_pointer (DECL_NAME (TYPE_NAME (t
))));
2536 /* Compare two TYPENAME_TYPEs. K1 and K2 are really of type `tree'. */
2539 typename_compare (const void * k1
, const void * k2
)
2548 d1
= TYPE_NAME (t1
);
2549 d2
= TYPE_NAME (t2
);
2551 return (DECL_NAME (d1
) == DECL_NAME (d2
)
2552 && TYPE_CONTEXT (t1
) == TYPE_CONTEXT (t2
)
2553 && ((TREE_TYPE (t1
) != NULL_TREE
)
2554 == (TREE_TYPE (t2
) != NULL_TREE
))
2555 && same_type_p (TREE_TYPE (t1
), TREE_TYPE (t2
))
2556 && TYPENAME_TYPE_FULLNAME (t1
) == TYPENAME_TYPE_FULLNAME (t2
));
2559 /* Build a TYPENAME_TYPE. If the type is `typename T::t', CONTEXT is
2560 the type of `T', NAME is the IDENTIFIER_NODE for `t'. If BASE_TYPE
2561 is non-NULL, this type is being created by the implicit typename
2562 extension, and BASE_TYPE is a type named `t' in some base class of
2563 `T' which depends on template parameters.
2565 Returns the new TYPENAME_TYPE. */
2567 static GTY ((param_is (union tree_node
))) htab_t typename_htab
;
2570 build_typename_type (tree context
, tree name
, tree fullname
)
2576 if (typename_htab
== NULL
)
2578 typename_htab
= htab_create_ggc (61, &typename_hash
,
2579 &typename_compare
, NULL
);
2582 /* Build the TYPENAME_TYPE. */
2583 t
= make_aggr_type (TYPENAME_TYPE
);
2584 TYPE_CONTEXT (t
) = FROB_CONTEXT (context
);
2585 TYPENAME_TYPE_FULLNAME (t
) = fullname
;
2587 /* Build the corresponding TYPE_DECL. */
2588 d
= build_decl (TYPE_DECL
, name
, t
);
2589 TYPE_NAME (TREE_TYPE (d
)) = d
;
2590 TYPE_STUB_DECL (TREE_TYPE (d
)) = d
;
2591 DECL_CONTEXT (d
) = FROB_CONTEXT (context
);
2592 DECL_ARTIFICIAL (d
) = 1;
2594 /* See if we already have this type. */
2595 e
= htab_find_slot (typename_htab
, t
, INSERT
);
2604 /* Resolve `typename CONTEXT::NAME'. Returns an appropriate type,
2605 unless an error occurs, in which case error_mark_node is returned.
2606 If we locate a non-artificial TYPE_DECL and TF_KEEP_TYPE_DECL is
2607 set, we return that, rather than the _TYPE it corresponds to, in
2608 other cases we look through the type decl. If TF_ERROR is set,
2609 complain about errors, otherwise be quiet. */
2612 make_typename_type (tree context
, tree name
, tsubst_flags_t complain
)
2616 if (name
== error_mark_node
2617 || context
== NULL_TREE
2618 || context
== error_mark_node
)
2619 return error_mark_node
;
2623 if (!(TYPE_LANG_SPECIFIC (name
)
2624 && (CLASSTYPE_IS_TEMPLATE (name
)
2625 || CLASSTYPE_USE_TEMPLATE (name
))))
2626 name
= TYPE_IDENTIFIER (name
);
2628 /* Create a TEMPLATE_ID_EXPR for the type. */
2629 name
= build_nt (TEMPLATE_ID_EXPR
,
2630 CLASSTYPE_TI_TEMPLATE (name
),
2631 CLASSTYPE_TI_ARGS (name
));
2633 else if (TREE_CODE (name
) == TYPE_DECL
)
2634 name
= DECL_NAME (name
);
2638 if (TREE_CODE (name
) == TEMPLATE_ID_EXPR
)
2640 name
= TREE_OPERAND (name
, 0);
2641 if (TREE_CODE (name
) == TEMPLATE_DECL
)
2642 name
= TREE_OPERAND (fullname
, 0) = DECL_NAME (name
);
2644 if (TREE_CODE (name
) == TEMPLATE_DECL
)
2646 error ("`%D' used without template parameters", name
);
2647 return error_mark_node
;
2649 gcc_assert (TREE_CODE (name
) == IDENTIFIER_NODE
);
2651 if (TREE_CODE (context
) == NAMESPACE_DECL
)
2653 /* We can get here from typename_sub0 in the explicit_template_type
2654 expansion. Just fail. */
2655 if (complain
& tf_error
)
2656 error ("no class template named `%#T' in `%#T'",
2658 return error_mark_node
;
2661 if (!dependent_type_p (context
)
2662 || currently_open_class (context
))
2664 if (TREE_CODE (fullname
) == TEMPLATE_ID_EXPR
)
2666 tree tmpl
= NULL_TREE
;
2667 if (IS_AGGR_TYPE (context
))
2668 tmpl
= lookup_field (context
, name
, 0, false);
2669 if (!tmpl
|| !DECL_CLASS_TEMPLATE_P (tmpl
))
2671 if (complain
& tf_error
)
2672 error ("no class template named `%#T' in `%#T'",
2674 return error_mark_node
;
2677 if (complain
& tf_error
)
2678 perform_or_defer_access_check (TYPE_BINFO (context
), tmpl
);
2680 return lookup_template_class (tmpl
,
2681 TREE_OPERAND (fullname
, 1),
2683 /*entering_scope=*/0,
2684 tf_error
| tf_warning
| tf_user
);
2690 if (!IS_AGGR_TYPE (context
))
2692 if (complain
& tf_error
)
2693 error ("no type named `%#T' in `%#T'", name
, context
);
2694 return error_mark_node
;
2697 t
= lookup_field (context
, name
, 0, true);
2700 if (TREE_CODE (t
) != TYPE_DECL
)
2702 if (complain
& tf_error
)
2703 error ("no type named `%#T' in `%#T'", name
, context
);
2704 return error_mark_node
;
2707 if (complain
& tf_error
)
2708 perform_or_defer_access_check (TYPE_BINFO (context
), t
);
2710 if (DECL_ARTIFICIAL (t
) || !(complain
& tf_keep_type_decl
))
2718 /* If the CONTEXT is not a template type, then either the field is
2719 there now or its never going to be. */
2720 if (!dependent_type_p (context
))
2722 if (complain
& tf_error
)
2723 error ("no type named `%#T' in `%#T'", name
, context
);
2724 return error_mark_node
;
2727 return build_typename_type (context
, name
, fullname
);
2730 /* Resolve `CONTEXT::template NAME'. Returns an appropriate type,
2731 unless an error occurs, in which case error_mark_node is returned.
2732 If we locate a TYPE_DECL, we return that, rather than the _TYPE it
2733 corresponds to. If COMPLAIN zero, don't complain about any errors
2737 make_unbound_class_template (tree context
, tree name
, tsubst_flags_t complain
)
2743 name
= TYPE_IDENTIFIER (name
);
2744 else if (DECL_P (name
))
2745 name
= DECL_NAME (name
);
2746 gcc_assert (TREE_CODE (name
) == IDENTIFIER_NODE
);
2748 if (!dependent_type_p (context
)
2749 || currently_open_class (context
))
2751 tree tmpl
= NULL_TREE
;
2753 if (IS_AGGR_TYPE (context
))
2754 tmpl
= lookup_field (context
, name
, 0, false);
2756 if (!tmpl
|| !DECL_CLASS_TEMPLATE_P (tmpl
))
2758 if (complain
& tf_error
)
2759 error ("no class template named `%#T' in `%#T'", name
, context
);
2760 return error_mark_node
;
2763 if (complain
& tf_error
)
2764 perform_or_defer_access_check (TYPE_BINFO (context
), tmpl
);
2769 /* Build the UNBOUND_CLASS_TEMPLATE. */
2770 t
= make_aggr_type (UNBOUND_CLASS_TEMPLATE
);
2771 TYPE_CONTEXT (t
) = FROB_CONTEXT (context
);
2772 TREE_TYPE (t
) = NULL_TREE
;
2774 /* Build the corresponding TEMPLATE_DECL. */
2775 d
= build_decl (TEMPLATE_DECL
, name
, t
);
2776 TYPE_NAME (TREE_TYPE (d
)) = d
;
2777 TYPE_STUB_DECL (TREE_TYPE (d
)) = d
;
2778 DECL_CONTEXT (d
) = FROB_CONTEXT (context
);
2779 DECL_ARTIFICIAL (d
) = 1;
2786 /* Push the declarations of builtin types into the namespace.
2787 RID_INDEX is the index of the builtin type in the array
2788 RID_POINTERS. NAME is the name used when looking up the builtin
2789 type. TYPE is the _TYPE node for the builtin type. */
2792 record_builtin_type (enum rid rid_index
,
2796 tree rname
= NULL_TREE
, tname
= NULL_TREE
;
2797 tree tdecl
= NULL_TREE
;
2799 if ((int) rid_index
< (int) RID_MAX
)
2800 rname
= ridpointers
[(int) rid_index
];
2802 tname
= get_identifier (name
);
2804 /* The calls to SET_IDENTIFIER_GLOBAL_VALUE below should be
2805 eliminated. Built-in types should not be looked up name; their
2806 names are keywords that the parser can recognize. However, there
2807 is code in c-common.c that uses identifier_global_value to look
2808 up built-in types by name. */
2811 tdecl
= build_decl (TYPE_DECL
, tname
, type
);
2812 DECL_ARTIFICIAL (tdecl
) = 1;
2813 SET_IDENTIFIER_GLOBAL_VALUE (tname
, tdecl
);
2819 tdecl
= build_decl (TYPE_DECL
, rname
, type
);
2820 DECL_ARTIFICIAL (tdecl
) = 1;
2822 SET_IDENTIFIER_GLOBAL_VALUE (rname
, tdecl
);
2825 if (!TYPE_NAME (type
))
2826 TYPE_NAME (type
) = tdecl
;
2829 debug_hooks
->type_decl (tdecl
, 0);
2832 /* Record one of the standard Java types.
2833 * Declare it as having the given NAME.
2834 * If SIZE > 0, it is the size of one of the integral types;
2835 * otherwise it is the negative of the size of one of the other types. */
2838 record_builtin_java_type (const char* name
, int size
)
2842 type
= make_signed_type (size
);
2843 else if (size
> -32)
2844 { /* "__java_char" or ""__java_boolean". */
2845 type
= make_unsigned_type (-size
);
2846 /*if (size == -1) TREE_SET_CODE (type, BOOLEAN_TYPE);*/
2849 { /* "__java_float" or ""__java_double". */
2850 type
= make_node (REAL_TYPE
);
2851 TYPE_PRECISION (type
) = - size
;
2854 record_builtin_type (RID_MAX
, name
, type
);
2855 decl
= TYPE_NAME (type
);
2857 /* Suppress generate debug symbol entries for these types,
2858 since for normal C++ they are just clutter.
2859 However, push_lang_context undoes this if extern "Java" is seen. */
2860 DECL_IGNORED_P (decl
) = 1;
2862 TYPE_FOR_JAVA (type
) = 1;
2866 /* Push a type into the namespace so that the back-ends ignore it. */
2869 record_unknown_type (tree type
, const char* name
)
2871 tree decl
= pushdecl (build_decl (TYPE_DECL
, get_identifier (name
), type
));
2872 /* Make sure the "unknown type" typedecl gets ignored for debug info. */
2873 DECL_IGNORED_P (decl
) = 1;
2874 TYPE_DECL_SUPPRESS_DEBUG (decl
) = 1;
2875 TYPE_SIZE (type
) = TYPE_SIZE (void_type_node
);
2876 TYPE_ALIGN (type
) = 1;
2877 TYPE_USER_ALIGN (type
) = 0;
2878 TYPE_MODE (type
) = TYPE_MODE (void_type_node
);
2881 /* An string for which we should create an IDENTIFIER_NODE at
2884 typedef struct predefined_identifier
2886 /* The name of the identifier. */
2887 const char *const name
;
2888 /* The place where the IDENTIFIER_NODE should be stored. */
2890 /* Nonzero if this is the name of a constructor or destructor. */
2891 const int ctor_or_dtor_p
;
2892 } predefined_identifier
;
2894 /* Create all the predefined identifiers. */
2897 initialize_predefined_identifiers (void)
2899 const predefined_identifier
*pid
;
2901 /* A table of identifiers to create at startup. */
2902 static const predefined_identifier predefined_identifiers
[] = {
2903 { "C++", &lang_name_cplusplus
, 0 },
2904 { "C", &lang_name_c
, 0 },
2905 { "Java", &lang_name_java
, 0 },
2906 { CTOR_NAME
, &ctor_identifier
, 1 },
2907 { "__base_ctor", &base_ctor_identifier
, 1 },
2908 { "__comp_ctor", &complete_ctor_identifier
, 1 },
2909 { DTOR_NAME
, &dtor_identifier
, 1 },
2910 { "__comp_dtor", &complete_dtor_identifier
, 1 },
2911 { "__base_dtor", &base_dtor_identifier
, 1 },
2912 { "__deleting_dtor", &deleting_dtor_identifier
, 1 },
2913 { IN_CHARGE_NAME
, &in_charge_identifier
, 0 },
2914 { "nelts", &nelts_identifier
, 0 },
2915 { THIS_NAME
, &this_identifier
, 0 },
2916 { VTABLE_DELTA_NAME
, &delta_identifier
, 0 },
2917 { VTABLE_PFN_NAME
, &pfn_identifier
, 0 },
2918 { "_vptr", &vptr_identifier
, 0 },
2919 { "__vtt_parm", &vtt_parm_identifier
, 0 },
2920 { "::", &global_scope_name
, 0 },
2921 { "std", &std_identifier
, 0 },
2925 for (pid
= predefined_identifiers
; pid
->name
; ++pid
)
2927 *pid
->node
= get_identifier (pid
->name
);
2928 if (pid
->ctor_or_dtor_p
)
2929 IDENTIFIER_CTOR_OR_DTOR_P (*pid
->node
) = 1;
2933 /* Create the predefined scalar types of C,
2934 and some nodes representing standard constants (0, 1, (void *)0).
2935 Initialize the global binding level.
2936 Make definitions for built-in primitive functions. */
2939 cxx_init_decl_processing (void)
2942 tree void_ftype_ptr
;
2944 build_common_tree_nodes (flag_signed_char
, false);
2946 /* Create all the identifiers we need. */
2947 initialize_predefined_identifiers ();
2949 /* Create the global variables. */
2950 push_to_top_level ();
2952 current_function_decl
= NULL_TREE
;
2953 current_binding_level
= NULL
;
2954 /* Enter the global namespace. */
2955 gcc_assert (global_namespace
== NULL_TREE
);
2956 global_namespace
= build_lang_decl (NAMESPACE_DECL
, global_scope_name
,
2958 begin_scope (sk_namespace
, global_namespace
);
2960 current_lang_name
= NULL_TREE
;
2962 /* Adjust various flags based on command-line settings. */
2963 if (!flag_permissive
)
2964 flag_pedantic_errors
= 1;
2965 if (!flag_no_inline
)
2967 flag_inline_trees
= 1;
2970 if (flag_inline_functions
)
2972 flag_inline_trees
= 2;
2973 flag_inline_functions
= 0;
2976 /* Force minimum function alignment if using the least significant
2977 bit of function pointers to store the virtual bit. */
2978 if (TARGET_PTRMEMFUNC_VBIT_LOCATION
== ptrmemfunc_vbit_in_pfn
2979 && force_align_functions_log
< 1)
2980 force_align_functions_log
= 1;
2983 current_lang_name
= lang_name_c
;
2985 error_mark_list
= build_tree_list (error_mark_node
, error_mark_node
);
2986 TREE_TYPE (error_mark_list
) = error_mark_node
;
2988 /* Create the `std' namespace. */
2989 push_namespace (std_identifier
);
2990 std_node
= current_namespace
;
2993 c_common_nodes_and_builtins ();
2995 java_byte_type_node
= record_builtin_java_type ("__java_byte", 8);
2996 java_short_type_node
= record_builtin_java_type ("__java_short", 16);
2997 java_int_type_node
= record_builtin_java_type ("__java_int", 32);
2998 java_long_type_node
= record_builtin_java_type ("__java_long", 64);
2999 java_float_type_node
= record_builtin_java_type ("__java_float", -32);
3000 java_double_type_node
= record_builtin_java_type ("__java_double", -64);
3001 java_char_type_node
= record_builtin_java_type ("__java_char", -16);
3002 java_boolean_type_node
= record_builtin_java_type ("__java_boolean", -1);
3004 integer_two_node
= build_int_cst (NULL_TREE
, 2);
3005 integer_three_node
= build_int_cst (NULL_TREE
, 3);
3007 record_builtin_type (RID_BOOL
, "bool", boolean_type_node
);
3008 truthvalue_type_node
= boolean_type_node
;
3009 truthvalue_false_node
= boolean_false_node
;
3010 truthvalue_true_node
= boolean_true_node
;
3012 empty_except_spec
= build_tree_list (NULL_TREE
, NULL_TREE
);
3015 record_builtin_type (RID_MAX
, NULL
, string_type_node
);
3018 delta_type_node
= ptrdiff_type_node
;
3019 vtable_index_type
= ptrdiff_type_node
;
3021 vtt_parm_type
= build_pointer_type (const_ptr_type_node
);
3022 void_ftype
= build_function_type (void_type_node
, void_list_node
);
3023 void_ftype_ptr
= build_function_type (void_type_node
,
3024 tree_cons (NULL_TREE
,
3028 = build_exception_variant (void_ftype_ptr
, empty_except_spec
);
3030 /* C++ extensions */
3032 unknown_type_node
= make_node (UNKNOWN_TYPE
);
3033 record_unknown_type (unknown_type_node
, "unknown type");
3035 /* Indirecting an UNKNOWN_TYPE node yields an UNKNOWN_TYPE node. */
3036 TREE_TYPE (unknown_type_node
) = unknown_type_node
;
3038 /* Looking up TYPE_POINTER_TO and TYPE_REFERENCE_TO yield the same
3040 TYPE_POINTER_TO (unknown_type_node
) = unknown_type_node
;
3041 TYPE_REFERENCE_TO (unknown_type_node
) = unknown_type_node
;
3044 /* Make sure we get a unique function type, so we can give
3045 its pointer type a name. (This wins for gdb.) */
3046 tree vfunc_type
= make_node (FUNCTION_TYPE
);
3047 TREE_TYPE (vfunc_type
) = integer_type_node
;
3048 TYPE_ARG_TYPES (vfunc_type
) = NULL_TREE
;
3049 layout_type (vfunc_type
);
3051 vtable_entry_type
= build_pointer_type (vfunc_type
);
3053 record_builtin_type (RID_MAX
, VTBL_PTR_TYPE
, vtable_entry_type
);
3056 = build_cplus_array_type (vtable_entry_type
, NULL_TREE
);
3057 layout_type (vtbl_type_node
);
3058 vtbl_type_node
= build_qualified_type (vtbl_type_node
, TYPE_QUAL_CONST
);
3059 record_builtin_type (RID_MAX
, NULL
, vtbl_type_node
);
3060 vtbl_ptr_type_node
= build_pointer_type (vtable_entry_type
);
3061 layout_type (vtbl_ptr_type_node
);
3062 record_builtin_type (RID_MAX
, NULL
, vtbl_ptr_type_node
);
3064 push_namespace (get_identifier ("__cxxabiv1"));
3065 abi_node
= current_namespace
;
3068 global_type_node
= make_node (LANG_TYPE
);
3069 record_unknown_type (global_type_node
, "global type");
3072 current_lang_name
= lang_name_cplusplus
;
3076 tree bad_alloc_type_node
;
3077 tree bad_alloc_decl
;
3078 tree newtype
, deltype
;
3079 tree ptr_ftype_sizetype
;
3081 push_namespace (std_identifier
);
3082 bad_alloc_id
= get_identifier ("bad_alloc");
3083 bad_alloc_type_node
= make_aggr_type (RECORD_TYPE
);
3084 TYPE_CONTEXT (bad_alloc_type_node
) = current_namespace
;
3086 = create_implicit_typedef (bad_alloc_id
, bad_alloc_type_node
);
3087 DECL_CONTEXT (bad_alloc_decl
) = current_namespace
;
3088 TYPE_STUB_DECL (bad_alloc_type_node
) = bad_alloc_decl
;
3092 = build_function_type (ptr_type_node
,
3093 tree_cons (NULL_TREE
,
3096 newtype
= build_exception_variant
3097 (ptr_ftype_sizetype
, add_exception_specifier
3098 (NULL_TREE
, bad_alloc_type_node
, -1));
3099 deltype
= build_exception_variant (void_ftype_ptr
, empty_except_spec
);
3100 push_cp_library_fn (NEW_EXPR
, newtype
);
3101 push_cp_library_fn (VEC_NEW_EXPR
, newtype
);
3102 global_delete_fndecl
= push_cp_library_fn (DELETE_EXPR
, deltype
);
3103 push_cp_library_fn (VEC_DELETE_EXPR
, deltype
);
3107 = build_library_fn_ptr ("__cxa_pure_virtual", void_ftype
);
3109 /* Perform other language dependent initializations. */
3110 init_class_processing ();
3111 init_rtti_processing ();
3113 if (flag_exceptions
)
3114 init_exception_processing ();
3116 if (! supports_one_only ())
3119 make_fname_decl
= cp_make_fname_decl
;
3120 start_fname_decls ();
3122 /* Show we use EH for cleanups. */
3123 if (flag_exceptions
)
3124 using_eh_for_cleanups ();
3127 /* Generate an initializer for a function naming variable from
3128 NAME. NAME may be NULL, to indicate a dependent name. TYPE_P is
3129 filled in with the type of the init. */
3132 cp_fname_init (const char* name
, tree
*type_p
)
3134 tree domain
= NULL_TREE
;
3136 tree init
= NULL_TREE
;
3141 length
= strlen (name
);
3142 domain
= build_index_type (size_int (length
));
3143 init
= build_string (length
+ 1, name
);
3146 type
= build_qualified_type (char_type_node
, TYPE_QUAL_CONST
);
3147 type
= build_cplus_array_type (type
, domain
);
3152 TREE_TYPE (init
) = type
;
3154 init
= error_mark_node
;
3159 /* Create the VAR_DECL for __FUNCTION__ etc. ID is the name to give the
3160 decl, NAME is the initialization string and TYPE_DEP indicates whether
3161 NAME depended on the type of the function. We make use of that to detect
3162 __PRETTY_FUNCTION__ inside a template fn. This is being done
3163 lazily at the point of first use, so we mustn't push the decl now. */
3166 cp_make_fname_decl (tree id
, int type_dep
)
3168 const char *const name
= (type_dep
&& processing_template_decl
3169 ? NULL
: fname_as_string (type_dep
));
3171 tree init
= cp_fname_init (name
, &type
);
3172 tree decl
= build_decl (VAR_DECL
, id
, type
);
3175 free ((char *) name
);
3177 /* As we're using pushdecl_with_scope, we must set the context. */
3178 DECL_CONTEXT (decl
) = current_function_decl
;
3179 DECL_PRETTY_FUNCTION_P (decl
) = type_dep
;
3181 TREE_STATIC (decl
) = 1;
3182 TREE_READONLY (decl
) = 1;
3183 DECL_ARTIFICIAL (decl
) = 1;
3184 DECL_INITIAL (decl
) = init
;
3186 TREE_USED (decl
) = 1;
3188 if (current_function_decl
)
3190 struct cp_binding_level
*b
= current_binding_level
;
3191 while (b
->level_chain
->kind
!= sk_function_parms
)
3193 pushdecl_with_scope (decl
, b
);
3194 cp_finish_decl (decl
, init
, NULL_TREE
, LOOKUP_ONLYCONVERTING
);
3197 pushdecl_top_level_and_finish (decl
, init
);
3202 /* Make a definition for a builtin function named NAME in the current
3203 namespace, whose data type is TYPE and whose context is CONTEXT.
3204 TYPE should be a function type with argument types.
3206 CLASS and CODE tell later passes how to compile calls to this function.
3207 See tree.h for possible values.
3209 If LIBNAME is nonzero, use that for DECL_ASSEMBLER_NAME,
3210 the name to be called if we can't opencode the function.
3211 If ATTRS is nonzero, use that for the function's attribute
3215 builtin_function_1 (const char* name
,
3218 enum built_in_function code
,
3219 enum built_in_class
class,
3220 const char* libname
,
3223 tree decl
= build_library_fn_1 (get_identifier (name
), ERROR_MARK
, type
);
3224 DECL_BUILT_IN_CLASS (decl
) = class;
3225 DECL_FUNCTION_CODE (decl
) = code
;
3226 DECL_CONTEXT (decl
) = context
;
3230 /* Since `pushdecl' relies on DECL_ASSEMBLER_NAME instead of DECL_NAME,
3231 we cannot change DECL_ASSEMBLER_NAME until we have installed this
3232 function in the namespace. */
3234 SET_DECL_ASSEMBLER_NAME (decl
, get_identifier (libname
));
3236 /* Warn if a function in the namespace for users
3237 is used without an occasion to consider it declared. */
3238 if (name
[0] != '_' || name
[1] != '_')
3239 DECL_ANTICIPATED (decl
) = 1;
3241 /* Possibly apply some default attributes to this built-in function. */
3243 decl_attributes (&decl
, attrs
, ATTR_FLAG_BUILT_IN
);
3245 decl_attributes (&decl
, NULL_TREE
, 0);
3250 /* Entry point for the benefit of c_common_nodes_and_builtins.
3252 Make a definition for a builtin function named NAME and whose data type
3253 is TYPE. TYPE should be a function type with argument types. This
3254 function places the anticipated declaration in the global namespace
3255 and additionally in the std namespace if appropriate.
3257 CLASS and CODE tell later passes how to compile calls to this function.
3258 See tree.h for possible values.
3260 If LIBNAME is nonzero, use that for DECL_ASSEMBLER_NAME,
3261 the name to be called if we can't opencode the function.
3263 If ATTRS is nonzero, use that for the function's attribute
3267 builtin_function (const char* name
,
3270 enum built_in_class cl
,
3271 const char* libname
,
3274 /* All builtins that don't begin with an '_' should additionally
3275 go in the 'std' namespace. */
3278 push_namespace (std_identifier
);
3279 builtin_function_1 (name
, type
, std_node
, code
, cl
, libname
, attrs
);
3283 return builtin_function_1 (name
, type
, NULL_TREE
, code
,
3284 cl
, libname
, attrs
);
3287 /* Generate a FUNCTION_DECL with the typical flags for a runtime library
3288 function. Not called directly. */
3291 build_library_fn_1 (tree name
, enum tree_code operator_code
, tree type
)
3293 tree fn
= build_lang_decl (FUNCTION_DECL
, name
, type
);
3294 DECL_EXTERNAL (fn
) = 1;
3295 TREE_PUBLIC (fn
) = 1;
3296 DECL_ARTIFICIAL (fn
) = 1;
3297 TREE_NOTHROW (fn
) = 1;
3298 SET_OVERLOADED_OPERATOR_CODE (fn
, operator_code
);
3299 SET_DECL_LANGUAGE (fn
, lang_c
);
3300 /* Runtime library routines are, by definition, available in an
3301 external shared object. */
3302 DECL_VISIBILITY (fn
) = VISIBILITY_DEFAULT
;
3303 DECL_VISIBILITY_SPECIFIED (fn
) = 1;
3307 /* Returns the _DECL for a library function with C linkage.
3308 We assume that such functions never throw; if this is incorrect,
3309 callers should unset TREE_NOTHROW. */
3312 build_library_fn (tree name
, tree type
)
3314 return build_library_fn_1 (name
, ERROR_MARK
, type
);
3317 /* Returns the _DECL for a library function with C++ linkage. */
3320 build_cp_library_fn (tree name
, enum tree_code operator_code
, tree type
)
3322 tree fn
= build_library_fn_1 (name
, operator_code
, type
);
3323 TREE_NOTHROW (fn
) = TYPE_NOTHROW_P (type
);
3324 DECL_CONTEXT (fn
) = FROB_CONTEXT (current_namespace
);
3325 SET_DECL_LANGUAGE (fn
, lang_cplusplus
);
3329 /* Like build_library_fn, but takes a C string instead of an
3333 build_library_fn_ptr (const char* name
, tree type
)
3335 return build_library_fn (get_identifier (name
), type
);
3338 /* Like build_cp_library_fn, but takes a C string instead of an
3342 build_cp_library_fn_ptr (const char* name
, tree type
)
3344 return build_cp_library_fn (get_identifier (name
), ERROR_MARK
, type
);
3347 /* Like build_library_fn, but also pushes the function so that we will
3348 be able to find it via IDENTIFIER_GLOBAL_VALUE. */
3351 push_library_fn (tree name
, tree type
)
3353 tree fn
= build_library_fn (name
, type
);
3354 pushdecl_top_level (fn
);
3358 /* Like build_cp_library_fn, but also pushes the function so that it
3359 will be found by normal lookup. */
3362 push_cp_library_fn (enum tree_code operator_code
, tree type
)
3364 tree fn
= build_cp_library_fn (ansi_opname (operator_code
),
3371 /* Like push_library_fn, but takes a TREE_LIST of parm types rather than
3375 push_void_library_fn (tree name
, tree parmtypes
)
3377 tree type
= build_function_type (void_type_node
, parmtypes
);
3378 return push_library_fn (name
, type
);
3381 /* Like push_library_fn, but also note that this function throws
3382 and does not return. Used for __throw_foo and the like. */
3385 push_throw_library_fn (tree name
, tree type
)
3387 tree fn
= push_library_fn (name
, type
);
3388 TREE_THIS_VOLATILE (fn
) = 1;
3389 TREE_NOTHROW (fn
) = 0;
3393 /* When we call finish_struct for an anonymous union, we create
3394 default copy constructors and such. But, an anonymous union
3395 shouldn't have such things; this function undoes the damage to the
3396 anonymous union type T.
3398 (The reason that we create the synthesized methods is that we don't
3399 distinguish `union { int i; }' from `typedef union { int i; } U'.
3400 The first is an anonymous union; the second is just an ordinary
3404 fixup_anonymous_aggr (tree t
)
3408 /* Wipe out memory of synthesized methods. */
3409 TYPE_HAS_CONSTRUCTOR (t
) = 0;
3410 TYPE_HAS_DEFAULT_CONSTRUCTOR (t
) = 0;
3411 TYPE_HAS_INIT_REF (t
) = 0;
3412 TYPE_HAS_CONST_INIT_REF (t
) = 0;
3413 TYPE_HAS_ASSIGN_REF (t
) = 0;
3414 TYPE_HAS_CONST_ASSIGN_REF (t
) = 0;
3416 /* Splice the implicitly generated functions out of the TYPE_METHODS
3418 q
= &TYPE_METHODS (t
);
3421 if (DECL_ARTIFICIAL (*q
))
3422 *q
= TREE_CHAIN (*q
);
3424 q
= &TREE_CHAIN (*q
);
3427 /* ISO C++ 9.5.3. Anonymous unions may not have function members. */
3428 if (TYPE_METHODS (t
))
3429 error ("%Jan anonymous union cannot have function members",
3430 TYPE_MAIN_DECL (t
));
3432 /* Anonymous aggregates cannot have fields with ctors, dtors or complex
3433 assignment operators (because they cannot have these methods themselves).
3434 For anonymous unions this is already checked because they are not allowed
3435 in any union, otherwise we have to check it. */
3436 if (TREE_CODE (t
) != UNION_TYPE
)
3440 for (field
= TYPE_FIELDS (t
); field
; field
= TREE_CHAIN (field
))
3441 if (TREE_CODE (field
) == FIELD_DECL
)
3443 type
= TREE_TYPE (field
);
3444 if (CLASS_TYPE_P (type
))
3446 if (TYPE_NEEDS_CONSTRUCTING (type
))
3447 cp_error_at ("member %#D' with constructor not allowed in anonymous aggregate",
3449 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type
))
3450 cp_error_at ("member %#D' with destructor not allowed in anonymous aggregate",
3452 if (TYPE_HAS_COMPLEX_ASSIGN_REF (type
))
3453 cp_error_at ("member %#D' with copy assignment operator not allowed in anonymous aggregate",
3460 /* Make sure that a declaration with no declarator is well-formed, i.e.
3461 just declares a tagged type or anonymous union.
3463 Returns the type declared; or NULL_TREE if none. */
3466 check_tag_decl (cp_decl_specifier_seq
*declspecs
)
3468 int saw_friend
= declspecs
->specs
[(int)ds_friend
] != 0;
3469 int saw_typedef
= declspecs
->specs
[(int)ds_typedef
] != 0;
3470 /* If a class, struct, or enum type is declared by the DECLSPECS
3471 (i.e, if a class-specifier, enum-specifier, or non-typename
3472 elaborated-type-specifier appears in the DECLSPECS),
3473 DECLARED_TYPE is set to the corresponding type. */
3474 tree declared_type
= NULL_TREE
;
3475 bool error_p
= false;
3477 if (declspecs
->multiple_types_p
)
3478 error ("multiple types in one declaration");
3479 else if (declspecs
->redefined_builtin_type
)
3481 if (!in_system_header
)
3482 pedwarn ("redeclaration of C++ built-in type %qT",
3483 declspecs
->redefined_builtin_type
);
3487 if (TYPE_P (declspecs
->type
)
3488 && ((TREE_CODE (declspecs
->type
) != TYPENAME_TYPE
3489 && IS_AGGR_TYPE (declspecs
->type
))
3490 || TREE_CODE (declspecs
->type
) == ENUMERAL_TYPE
))
3491 declared_type
= declspecs
->type
;
3492 else if (declspecs
->type
== error_mark_node
)
3494 if (declared_type
== NULL_TREE
&& ! saw_friend
&& !error_p
)
3495 pedwarn ("declaration does not declare anything");
3496 /* Check for an anonymous union. */
3497 else if (declared_type
&& IS_AGGR_TYPE_CODE (TREE_CODE (declared_type
))
3498 && TYPE_ANONYMOUS_P (declared_type
))
3500 /* 7/3 In a simple-declaration, the optional init-declarator-list
3501 can be omitted only when declaring a class (clause 9) or
3502 enumeration (7.2), that is, when the decl-specifier-seq contains
3503 either a class-specifier, an elaborated-type-specifier with
3504 a class-key (9.1), or an enum-specifier. In these cases and
3505 whenever a class-specifier or enum-specifier is present in the
3506 decl-specifier-seq, the identifiers in these specifiers are among
3507 the names being declared by the declaration (as class-name,
3508 enum-names, or enumerators, depending on the syntax). In such
3509 cases, and except for the declaration of an unnamed bit-field (9.6),
3510 the decl-specifier-seq shall introduce one or more names into the
3511 program, or shall redeclare a name introduced by a previous
3512 declaration. [Example:
3513 enum { }; // ill-formed
3514 typedef class { }; // ill-formed
3518 error ("missing type-name in typedef-declaration");
3521 /* Anonymous unions are objects, so they can have specifiers. */;
3522 SET_ANON_AGGR_TYPE_P (declared_type
);
3524 if (TREE_CODE (declared_type
) != UNION_TYPE
&& pedantic
3525 && !in_system_header
)
3526 pedwarn ("ISO C++ prohibits anonymous structs");
3531 if (declspecs
->specs
[(int)ds_inline
]
3532 || declspecs
->specs
[(int)ds_virtual
])
3533 error ("`%s' can only be specified for functions",
3534 declspecs
->specs
[(int)ds_inline
]
3535 ? "inline" : "virtual");
3537 && (!current_class_type
3538 || current_scope () != current_class_type
))
3539 error ("`friend' can only be specified inside a class");
3540 else if (declspecs
->specs
[(int)ds_explicit
])
3541 error ("`explicit' can only be specified for constructors");
3542 else if (declspecs
->storage_class
)
3543 error ("a storage class can only be specified for objects "
3545 else if (declspecs
->specs
[(int)ds_const
]
3546 || declspecs
->specs
[(int)ds_volatile
]
3547 || declspecs
->specs
[(int)ds_restrict
]
3548 || declspecs
->specs
[(int)ds_thread
])
3549 error ("qualifiers can only be specified for objects "
3553 return declared_type
;
3556 /* Called when a declaration is seen that contains no names to declare.
3557 If its type is a reference to a structure, union or enum inherited
3558 from a containing scope, shadow that tag name for the current scope
3559 with a forward reference.
3560 If its type defines a new named structure or union
3561 or defines an enum, it is valid but we need not do anything here.
3562 Otherwise, it is an error.
3564 C++: may have to grok the declspecs to learn about static,
3565 complain for anonymous unions.
3567 Returns the TYPE declared -- or NULL_TREE if none. */
3570 shadow_tag (cp_decl_specifier_seq
*declspecs
)
3572 tree t
= check_tag_decl (declspecs
);
3577 maybe_process_partial_specialization (t
);
3579 /* This is where the variables in an anonymous union are
3580 declared. An anonymous union declaration looks like:
3582 because there is no declarator after the union, the parser
3583 sends that declaration here. */
3584 if (ANON_AGGR_TYPE_P (t
))
3586 fixup_anonymous_aggr (t
);
3588 if (TYPE_FIELDS (t
))
3590 tree decl
= grokdeclarator (/*declarator=*/NULL
,
3591 declspecs
, NORMAL
, 0, NULL
);
3592 finish_anon_union (decl
);
3599 /* Decode a "typename", such as "int **", returning a ..._TYPE node. */
3602 groktypename (cp_decl_specifier_seq
*type_specifiers
,
3603 const cp_declarator
*declarator
)
3607 attrs
= type_specifiers
->attributes
;
3608 type_specifiers
->attributes
= NULL_TREE
;
3609 type
= grokdeclarator (declarator
, type_specifiers
, TYPENAME
, 0, &attrs
);
3611 cplus_decl_attributes (&type
, attrs
, 0);
3615 /* Decode a declarator in an ordinary declaration or data definition.
3616 This is called as soon as the type information and variable name
3617 have been parsed, before parsing the initializer if any.
3618 Here we create the ..._DECL node, fill in its type,
3619 and put it on the list of decls for the current context.
3620 The ..._DECL node is returned as the value.
3622 Exception: for arrays where the length is not specified,
3623 the type is left null, to be filled in by `cp_finish_decl'.
3625 Function definitions do not come here; they go to start_function
3626 instead. However, external and forward declarations of functions
3627 do go through here. Structure field declarations are done by
3628 grokfield and not through here. */
3631 start_decl (const cp_declarator
*declarator
,
3632 cp_decl_specifier_seq
*declspecs
,
3635 tree prefix_attributes
,
3642 /* This should only be done once on the top most decl. */
3643 if (have_extern_spec
)
3645 declspecs
->storage_class
= sc_extern
;
3646 have_extern_spec
= false;
3649 /* An object declared as __attribute__((deprecated)) suppresses
3650 warnings of uses of other deprecated items. */
3651 if (lookup_attribute ("deprecated", attributes
))
3652 deprecated_state
= DEPRECATED_SUPPRESS
;
3654 attributes
= chainon (attributes
, prefix_attributes
);
3656 decl
= grokdeclarator (declarator
, declspecs
, NORMAL
, initialized
,
3659 deprecated_state
= DEPRECATED_NORMAL
;
3661 if (decl
== NULL_TREE
|| TREE_CODE (decl
) == VOID_TYPE
)
3664 type
= TREE_TYPE (decl
);
3666 if (type
== error_mark_node
)
3669 context
= DECL_CONTEXT (decl
);
3672 *pop_scope_p
= push_scope (context
);
3674 *pop_scope_p
= false;
3676 /* We are only interested in class contexts, later. */
3677 if (context
&& TREE_CODE (context
) == NAMESPACE_DECL
)
3678 context
= NULL_TREE
;
3681 /* Is it valid for this decl to have an initializer at all?
3682 If not, set INITIALIZED to zero, which will indirectly
3683 tell `cp_finish_decl' to ignore the initializer once it is parsed. */
3684 switch (TREE_CODE (decl
))
3687 error ("typedef `%D' is initialized (use __typeof__ instead)", decl
);
3692 error ("function `%#D' is initialized like a variable", decl
);
3702 if (! toplevel_bindings_p ()
3703 && DECL_EXTERNAL (decl
))
3704 warning ("declaration of `%#D' has `extern' and is initialized",
3706 DECL_EXTERNAL (decl
) = 0;
3707 if (toplevel_bindings_p ())
3708 TREE_STATIC (decl
) = 1;
3710 /* Tell `pushdecl' this is an initialized decl
3711 even though we don't yet have the initializer expression.
3712 Also tell `cp_finish_decl' it may store the real initializer. */
3713 DECL_INITIAL (decl
) = error_mark_node
;
3716 /* Set attributes here so if duplicate decl, will have proper attributes. */
3717 cplus_decl_attributes (&decl
, attributes
, 0);
3719 /* If #pragma weak was used, mark the decl weak now. */
3720 if (global_scope_p (current_binding_level
))
3721 maybe_apply_pragma_weak (decl
);
3723 if (TREE_CODE (decl
) == FUNCTION_DECL
3724 && DECL_DECLARED_INLINE_P (decl
)
3725 && DECL_UNINLINABLE (decl
)
3726 && lookup_attribute ("noinline", DECL_ATTRIBUTES (decl
)))
3727 warning ("%Jinline function '%D' given attribute noinline", decl
, decl
);
3729 if (context
&& COMPLETE_TYPE_P (complete_type (context
)))
3731 if (TREE_CODE (decl
) == VAR_DECL
)
3733 tree field
= lookup_field (context
, DECL_NAME (decl
), 0, false);
3734 if (field
== NULL_TREE
|| TREE_CODE (field
) != VAR_DECL
)
3735 error ("`%#D' is not a static member of `%#T'", decl
, context
);
3738 if (DECL_CONTEXT (field
) != context
)
3740 if (!same_type_p (DECL_CONTEXT (field
), context
))
3741 pedwarn ("ISO C++ does not permit `%T::%D' to be defined as `%T::%D'",
3742 DECL_CONTEXT (field
), DECL_NAME (decl
),
3743 context
, DECL_NAME (decl
));
3744 DECL_CONTEXT (decl
) = DECL_CONTEXT (field
);
3746 /* Static data member are tricky; an in-class initialization
3747 still doesn't provide a definition, so the in-class
3748 declaration will have DECL_EXTERNAL set, but will have an
3749 initialization. Thus, duplicate_decls won't warn
3750 about this situation, and so we check here. */
3751 if (DECL_INITIAL (decl
) && DECL_INITIAL (field
))
3752 error ("duplicate initialization of %D", decl
);
3753 if (duplicate_decls (decl
, field
))
3759 tree field
= check_classfn (context
, decl
,
3760 (processing_template_decl
3761 > template_class_depth (context
))
3762 ? current_template_parms
3764 if (field
&& duplicate_decls (decl
, field
))
3768 /* cp_finish_decl sets DECL_EXTERNAL if DECL_IN_AGGR_P is set. */
3769 DECL_IN_AGGR_P (decl
) = 0;
3770 if ((DECL_LANG_SPECIFIC (decl
) && DECL_USE_TEMPLATE (decl
))
3771 || CLASSTYPE_TEMPLATE_INSTANTIATION (context
))
3773 SET_DECL_TEMPLATE_SPECIALIZATION (decl
);
3774 /* [temp.expl.spec] An explicit specialization of a static data
3775 member of a template is a definition if the declaration
3776 includes an initializer; otherwise, it is a declaration.
3778 We check for processing_specialization so this only applies
3779 to the new specialization syntax. */
3780 if (DECL_INITIAL (decl
) == NULL_TREE
&& processing_specialization
)
3781 DECL_EXTERNAL (decl
) = 1;
3784 if (DECL_EXTERNAL (decl
) && ! DECL_TEMPLATE_SPECIALIZATION (decl
))
3785 pedwarn ("declaration of `%#D' outside of class is not definition",
3789 /* Enter this declaration into the symbol table. */
3790 tem
= maybe_push_decl (decl
);
3792 if (processing_template_decl
)
3793 tem
= push_template_decl (tem
);
3794 if (tem
== error_mark_node
)
3795 return error_mark_node
;
3797 #if ! defined (ASM_OUTPUT_BSS) && ! defined (ASM_OUTPUT_ALIGNED_BSS)
3798 /* Tell the back-end to use or not use .common as appropriate. If we say
3799 -fconserve-space, we want this to save .data space, at the expense of
3800 wrong semantics. If we say -fno-conserve-space, we want this to
3801 produce errors about redefs; to do this we force variables into the
3803 DECL_COMMON (tem
) = ((TREE_CODE (tem
) != VAR_DECL
3804 || !DECL_THREAD_LOCAL (tem
))
3805 && (flag_conserve_space
|| ! TREE_PUBLIC (tem
)));
3808 if (! processing_template_decl
)
3815 start_decl_1 (tree decl
)
3817 tree type
= TREE_TYPE (decl
);
3818 int initialized
= (DECL_INITIAL (decl
) != NULL_TREE
);
3820 if (type
== error_mark_node
)
3824 /* Is it valid for this decl to have an initializer at all?
3825 If not, set INITIALIZED to zero, which will indirectly
3826 tell `cp_finish_decl' to ignore the initializer once it is parsed. */
3828 /* Don't allow initializations for incomplete types except for
3829 arrays which might be completed by the initialization. */
3830 if (COMPLETE_TYPE_P (complete_type (type
)))
3831 ; /* A complete type is ok. */
3832 else if (TREE_CODE (type
) != ARRAY_TYPE
)
3834 error ("variable `%#D' has initializer but incomplete type",
3837 type
= TREE_TYPE (decl
) = error_mark_node
;
3839 else if (!COMPLETE_TYPE_P (complete_type (TREE_TYPE (type
))))
3841 if (DECL_LANG_SPECIFIC (decl
) && DECL_TEMPLATE_INFO (decl
))
3842 error ("elements of array `%#D' have incomplete type", decl
);
3843 /* else we already gave an error in start_decl. */
3849 && TREE_CODE (decl
) != TYPE_DECL
3850 && TREE_CODE (decl
) != TEMPLATE_DECL
3851 && type
!= error_mark_node
3852 && IS_AGGR_TYPE (type
)
3853 && ! DECL_EXTERNAL (decl
))
3855 if ((! processing_template_decl
|| ! uses_template_parms (type
))
3856 && !COMPLETE_TYPE_P (complete_type (type
)))
3858 error ("aggregate `%#D' has incomplete type and cannot be defined",
3860 /* Change the type so that assemble_variable will give
3861 DECL an rtl we can live with: (mem (const_int 0)). */
3862 type
= TREE_TYPE (decl
) = error_mark_node
;
3866 /* If any base type in the hierarchy of TYPE needs a constructor,
3867 then we set initialized to 1. This way any nodes which are
3868 created for the purposes of initializing this aggregate
3869 will live as long as it does. This is necessary for global
3870 aggregates which do not have their initializers processed until
3871 the end of the file. */
3872 initialized
= TYPE_NEEDS_CONSTRUCTING (type
);
3877 DECL_INITIAL (decl
) = NULL_TREE
;
3879 /* Create a new scope to hold this declaration if necessary.
3880 Whether or not a new scope is necessary cannot be determined
3881 until after the type has been completed; if the type is a
3882 specialization of a class template it is not until after
3883 instantiation has occurred that TYPE_HAS_NONTRIVIAL_DESTRUCTOR
3884 will be set correctly. */
3885 maybe_push_cleanup_level (type
);
3888 /* Handle initialization of references. DECL, TYPE, and INIT have the
3889 same meaning as in cp_finish_decl. *CLEANUP must be NULL on entry,
3890 but will be set to a new CLEANUP_STMT if a temporary is created
3891 that must be destroyed subsequently.
3893 Returns an initializer expression to use to initialize DECL, or
3894 NULL if the initialization can be performed statically.
3896 Quotes on semantics can be found in ARM 8.4.3. */
3899 grok_reference_init (tree decl
, tree type
, tree init
, tree
*cleanup
)
3903 if (init
== NULL_TREE
)
3905 if ((DECL_LANG_SPECIFIC (decl
) == 0
3906 || DECL_IN_AGGR_P (decl
) == 0)
3907 && ! DECL_THIS_EXTERN (decl
))
3908 error ("`%D' declared as reference but not initialized", decl
);
3912 if (TREE_CODE (init
) == CONSTRUCTOR
)
3914 error ("ISO C++ forbids use of initializer list to initialize reference `%D'", decl
);
3918 if (TREE_CODE (init
) == TREE_LIST
)
3919 init
= build_x_compound_expr_from_list (init
, "initializer");
3921 if (TREE_CODE (TREE_TYPE (init
)) == REFERENCE_TYPE
)
3922 init
= convert_from_reference (init
);
3924 if (TREE_CODE (TREE_TYPE (type
)) != ARRAY_TYPE
3925 && TREE_CODE (TREE_TYPE (init
)) == ARRAY_TYPE
)
3926 /* Note: default conversion is only called in very special cases. */
3927 init
= decay_conversion (init
);
3929 /* Convert INIT to the reference type TYPE. This may involve the
3930 creation of a temporary, whose lifetime must be the same as that
3931 of the reference. If so, a DECL_EXPR for the temporary will be
3932 added just after the DECL_EXPR for DECL. That's why we don't set
3933 DECL_INITIAL for local references (instead assigning to them
3934 explicitly); we need to allow the temporary to be initialized
3936 tmp
= initialize_reference (type
, init
, decl
, cleanup
);
3938 if (tmp
== error_mark_node
)
3940 else if (tmp
== NULL_TREE
)
3942 error ("cannot initialize `%T' from `%T'", type
, TREE_TYPE (init
));
3946 if (TREE_STATIC (decl
) && !TREE_CONSTANT (tmp
))
3949 DECL_INITIAL (decl
) = tmp
;
3954 /* When parsing `int a[] = {1, 2};' we don't know the size of the
3955 array until we finish parsing the initializer. If that's the
3956 situation we're in, update DECL accordingly. */
3959 maybe_deduce_size_from_array_init (tree decl
, tree init
)
3961 tree type
= TREE_TYPE (decl
);
3963 if (TREE_CODE (type
) == ARRAY_TYPE
3964 && TYPE_DOMAIN (type
) == NULL_TREE
3965 && TREE_CODE (decl
) != TYPE_DECL
)
3967 /* do_default is really a C-ism to deal with tentative definitions.
3968 But let's leave it here to ease the eventual merge. */
3969 int do_default
= !DECL_EXTERNAL (decl
);
3970 tree initializer
= init
? init
: DECL_INITIAL (decl
);
3971 int failure
= complete_array_type (type
, initializer
, do_default
);
3974 error ("initializer fails to determine size of `%D'", decl
);
3979 error ("array size missing in `%D'", decl
);
3980 /* If a `static' var's size isn't known, make it extern as
3981 well as static, so it does not get allocated. If it's not
3982 `static', then don't mark it extern; finish_incomplete_decl
3983 will give it a default size and it will get allocated. */
3984 else if (!pedantic
&& TREE_STATIC (decl
) && !TREE_PUBLIC (decl
))
3985 DECL_EXTERNAL (decl
) = 1;
3988 if (pedantic
&& TYPE_DOMAIN (type
) != NULL_TREE
3989 && tree_int_cst_lt (TYPE_MAX_VALUE (TYPE_DOMAIN (type
)),
3991 error ("zero-size array `%D'", decl
);
3993 layout_decl (decl
, 0);
3997 /* Set DECL_SIZE, DECL_ALIGN, etc. for DECL (a VAR_DECL), and issue
3998 any appropriate error messages regarding the layout. */
4001 layout_var_decl (tree decl
)
4003 tree type
= TREE_TYPE (decl
);
4005 tree ttype
= target_type (type
);
4008 /* If we haven't already layed out this declaration, do so now.
4009 Note that we must not call complete type for an external object
4010 because it's type might involve templates that we are not
4011 supposed to instantiate yet. (And it's perfectly valid to say
4012 `extern X x' for some incomplete type `X'.) */
4013 if (!DECL_EXTERNAL (decl
))
4014 complete_type (type
);
4015 if (!DECL_SIZE (decl
)
4016 && TREE_TYPE (decl
) != error_mark_node
4017 && (COMPLETE_TYPE_P (type
)
4018 || (TREE_CODE (type
) == ARRAY_TYPE
4019 && !TYPE_DOMAIN (type
)
4020 && COMPLETE_TYPE_P (TREE_TYPE (type
)))))
4021 layout_decl (decl
, 0);
4023 if (!DECL_EXTERNAL (decl
) && DECL_SIZE (decl
) == NULL_TREE
)
4025 /* An automatic variable with an incomplete type: that is an error.
4026 Don't talk about array types here, since we took care of that
4027 message in grokdeclarator. */
4028 error ("storage size of `%D' isn't known", decl
);
4029 TREE_TYPE (decl
) = error_mark_node
;
4032 /* Keep this code around in case we later want to control debug info
4033 based on whether a type is "used". (jason 1999-11-11) */
4035 else if (!DECL_EXTERNAL (decl
) && IS_AGGR_TYPE (ttype
))
4036 /* Let debugger know it should output info for this type. */
4037 note_debug_info_needed (ttype
);
4039 if (TREE_STATIC (decl
) && DECL_CLASS_SCOPE_P (decl
))
4040 note_debug_info_needed (DECL_CONTEXT (decl
));
4043 if ((DECL_EXTERNAL (decl
) || TREE_STATIC (decl
))
4044 && DECL_SIZE (decl
) != NULL_TREE
4045 && ! TREE_CONSTANT (DECL_SIZE (decl
)))
4047 if (TREE_CODE (DECL_SIZE (decl
)) == INTEGER_CST
)
4048 constant_expression_warning (DECL_SIZE (decl
));
4050 error ("storage size of `%D' isn't constant", decl
);
4053 if (TREE_STATIC (decl
)
4054 && !DECL_ARTIFICIAL (decl
)
4055 && current_function_decl
4056 && DECL_CONTEXT (decl
) == current_function_decl
)
4057 push_local_name (decl
);
4060 /* If a local static variable is declared in an inline function, or if
4061 we have a weak definition, we must endeavor to create only one
4062 instance of the variable at link-time. */
4065 maybe_commonize_var (tree decl
)
4067 /* Static data in a function with comdat linkage also has comdat
4069 if (TREE_STATIC (decl
)
4070 /* Don't mess with __FUNCTION__. */
4071 && ! DECL_ARTIFICIAL (decl
)
4072 && DECL_FUNCTION_SCOPE_P (decl
)
4073 /* Unfortunately, import_export_decl has not always been called
4074 before the function is processed, so we cannot simply check
4076 && (DECL_COMDAT (DECL_CONTEXT (decl
))
4077 || ((DECL_DECLARED_INLINE_P (DECL_CONTEXT (decl
))
4078 || DECL_TEMPLATE_INSTANTIATION (DECL_CONTEXT (decl
)))
4079 && TREE_PUBLIC (DECL_CONTEXT (decl
)))))
4083 /* With weak symbols, we simply make the variable COMDAT;
4084 that will cause copies in multiple translations units to
4086 comdat_linkage (decl
);
4090 if (DECL_INITIAL (decl
) == NULL_TREE
4091 || DECL_INITIAL (decl
) == error_mark_node
)
4093 /* Without weak symbols, we can use COMMON to merge
4094 uninitialized variables. */
4095 TREE_PUBLIC (decl
) = 1;
4096 DECL_COMMON (decl
) = 1;
4100 /* While for initialized variables, we must use internal
4101 linkage -- which means that multiple copies will not
4103 TREE_PUBLIC (decl
) = 0;
4104 DECL_COMMON (decl
) = 0;
4105 cp_warning_at ("sorry: semantics of inline function static data `%#D' are wrong (you'll wind up with multiple copies)", decl
);
4106 warning ("%J you can work around this by removing the initializer",
4111 else if (DECL_LANG_SPECIFIC (decl
) && DECL_COMDAT (decl
))
4112 /* Set it up again; we might have set DECL_INITIAL since the last
4114 comdat_linkage (decl
);
4117 /* Issue an error message if DECL is an uninitialized const variable. */
4120 check_for_uninitialized_const_var (tree decl
)
4122 tree type
= TREE_TYPE (decl
);
4124 /* ``Unless explicitly declared extern, a const object does not have
4125 external linkage and must be initialized. ($8.4; $12.1)'' ARM
4127 if (TREE_CODE (decl
) == VAR_DECL
4128 && TREE_CODE (type
) != REFERENCE_TYPE
4129 && CP_TYPE_CONST_P (type
)
4130 && !TYPE_NEEDS_CONSTRUCTING (type
)
4131 && !DECL_INITIAL (decl
))
4132 error ("uninitialized const `%D'", decl
);
4135 /* FIELD is a FIELD_DECL or NULL. In the former case, the value
4136 returned is the next FIELD_DECL (possibly FIELD itself) that can be
4137 initialized. If there are no more such fields, the return value
4141 next_initializable_field (tree field
)
4144 && (TREE_CODE (field
) != FIELD_DECL
4145 || (DECL_C_BIT_FIELD (field
) && !DECL_NAME (field
))
4146 || DECL_ARTIFICIAL (field
)))
4147 field
= TREE_CHAIN (field
);
4152 /* Subroutine of reshape_init. Reshape the constructor for an array. INITP
4153 is the pointer to the old constructor list (to the CONSTRUCTOR_ELTS of
4154 the CONSTRUCTOR we are processing), while NEW_INIT is the CONSTRUCTOR we
4156 ELT_TYPE is the element type of the array. MAX_INDEX is an INTEGER_CST
4157 representing the size of the array minus one (the maximum index), or
4158 NULL_TREE if the array was declared without specifying the size. */
4161 reshape_init_array (tree elt_type
, tree max_index
,
4162 tree
*initp
, tree new_init
)
4164 bool sized_array_p
= (max_index
!= NULL_TREE
);
4165 HOST_WIDE_INT max_index_cst
= 0;
4166 HOST_WIDE_INT index
;
4169 /* HWI is either 32bit or 64bit, so it must be enough to represent the
4171 max_index_cst
= tree_low_cst (max_index
, 1);
4173 /* Loop until there are no more initializers. */
4175 *initp
&& (!sized_array_p
|| index
<= max_index_cst
);
4179 tree designated_index
;
4181 element_init
= reshape_init (elt_type
, initp
);
4182 if (element_init
== error_mark_node
)
4184 TREE_CHAIN (element_init
) = CONSTRUCTOR_ELTS (new_init
);
4185 CONSTRUCTOR_ELTS (new_init
) = element_init
;
4186 designated_index
= TREE_PURPOSE (element_init
);
4187 if (designated_index
)
4189 /* Handle array designated initializers (GNU extension). */
4190 if (TREE_CODE (designated_index
) == IDENTIFIER_NODE
)
4192 error ("name `%D' used in a GNU-style designated "
4193 "initializer for an array", designated_index
);
4194 TREE_PURPOSE (element_init
) = NULL_TREE
;
4198 gcc_assert (TREE_CODE (designated_index
) == INTEGER_CST
);
4200 && tree_int_cst_lt (max_index
, designated_index
))
4202 error ("Designated initializer `%E' larger than array "
4203 "size", designated_index
);
4204 TREE_PURPOSE (element_init
) = NULL_TREE
;
4207 index
= tree_low_cst (designated_index
, 1);
4215 /* Undo the brace-elision allowed by [dcl.init.aggr] in a
4216 brace-enclosed aggregate initializer.
4218 *INITP is one of a list of initializers describing a brace-enclosed
4219 initializer for an entity of the indicated aggregate TYPE. It may
4220 not presently match the shape of the TYPE; for example:
4222 struct S { int a; int b; };
4223 struct S a[] = { 1, 2, 3, 4 };
4225 Here *INITP will point to TREE_LIST of four elements, rather than a
4226 list of two elements, each itself a list of two elements. This
4227 routine transforms INIT from the former form into the latter. The
4228 revised initializer is returned. */
4231 reshape_init (tree type
, tree
*initp
)
4235 tree old_init_value
;
4237 bool brace_enclosed_p
;
4240 old_init_value
= (TREE_CODE (*initp
) == TREE_LIST
4241 ? TREE_VALUE (*initp
) : old_init
);
4243 gcc_assert (old_init_value
);
4245 /* If the initializer is brace-enclosed, pull initializers from the
4246 enclosed elements. Advance past the brace-enclosed initializer
4248 if (TREE_CODE (old_init_value
) == CONSTRUCTOR
4249 && BRACE_ENCLOSED_INITIALIZER_P (old_init_value
))
4251 *initp
= TREE_CHAIN (old_init
);
4252 TREE_CHAIN (old_init
) = NULL_TREE
;
4253 inits
= CONSTRUCTOR_ELTS (old_init_value
);
4255 brace_enclosed_p
= true;
4260 brace_enclosed_p
= false;
4263 /* A non-aggregate type is always initialized with a single
4265 if (!CP_AGGREGATE_TYPE_P (type
))
4267 *initp
= TREE_CHAIN (old_init
);
4268 TREE_CHAIN (old_init
) = NULL_TREE
;
4269 /* It is invalid to initialize a non-aggregate type with a
4270 brace-enclosed initializer. */
4271 if (brace_enclosed_p
)
4273 error ("brace-enclosed initializer used to initialize `%T'",
4275 if (TREE_CODE (old_init
) == TREE_LIST
)
4276 TREE_VALUE (old_init
) = error_mark_node
;
4278 old_init
= error_mark_node
;
4286 All implicit type conversions (clause _conv_) are considered when
4287 initializing the aggregate member with an initializer from an
4288 initializer-list. If the initializer can initialize a member,
4289 the member is initialized. Otherwise, if the member is itself a
4290 non-empty subaggregate, brace elision is assumed and the
4291 initializer is considered for the initialization of the first
4292 member of the subaggregate. */
4293 if (!brace_enclosed_p
4294 && can_convert_arg (type
, TREE_TYPE (old_init_value
), old_init_value
))
4296 *initp
= TREE_CHAIN (old_init
);
4297 TREE_CHAIN (old_init
) = NULL_TREE
;
4301 if (TREE_CODE (old_init_value
) == STRING_CST
4302 && TREE_CODE (type
) == ARRAY_TYPE
4303 && char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (type
))))
4305 /* [dcl.init.string]
4307 A char array (whether plain char, signed char, or unsigned char)
4308 can be initialized by a string-literal (optionally enclosed in
4309 braces); a wchar_t array can be initialized by a wide
4310 string-literal (optionally enclosed in braces). */
4311 new_init
= old_init
;
4312 /* Move past the initializer. */
4313 *initp
= TREE_CHAIN (old_init
);
4314 TREE_CHAIN (old_init
) = NULL_TREE
;
4318 /* Build a CONSTRUCTOR to hold the contents of the aggregate. */
4319 new_init
= build_constructor (NULL_TREE
, NULL_TREE
);
4321 if (CLASS_TYPE_P (type
))
4325 field
= next_initializable_field (TYPE_FIELDS (type
));
4331 An initializer for an aggregate member that is an
4332 empty class shall have the form of an empty
4333 initializer-list {}. */
4334 if (!brace_enclosed_p
)
4336 error ("initializer for `%T' must be brace-enclosed",
4338 return error_mark_node
;
4343 /* Loop through the initializable fields, gathering
4349 /* Handle designated initializers, as an extension. */
4350 if (TREE_PURPOSE (*initp
))
4353 pedwarn ("ISO C++ does not allow designated initializers");
4354 field
= lookup_field_1 (type
, TREE_PURPOSE (*initp
),
4355 /*want_type=*/false);
4356 if (!field
|| TREE_CODE (field
) != FIELD_DECL
)
4357 error ("`%T' has no non-static data member named `%D'",
4358 type
, TREE_PURPOSE (*initp
));
4363 field_init
= reshape_init (TREE_TYPE (field
), initp
);
4364 if (field_init
== error_mark_node
)
4365 return error_mark_node
;
4366 TREE_CHAIN (field_init
) = CONSTRUCTOR_ELTS (new_init
);
4367 CONSTRUCTOR_ELTS (new_init
) = field_init
;
4370 When a union is initialized with a brace-enclosed
4371 initializer, the braces shall only contain an
4372 initializer for the first member of the union. */
4373 if (TREE_CODE (type
) == UNION_TYPE
)
4375 field
= next_initializable_field (TREE_CHAIN (field
));
4379 else if (TREE_CODE (type
) == ARRAY_TYPE
4380 || TREE_CODE (type
) == VECTOR_TYPE
)
4382 /* If the bound of the array is known, take no more initializers
4383 than are allowed. */
4384 tree max_index
= NULL_TREE
;
4385 if (TREE_CODE (type
) == ARRAY_TYPE
)
4387 if (TYPE_DOMAIN (type
))
4388 max_index
= array_type_nelts (type
);
4392 /* For a vector, the representation type is a struct
4393 containing a single member which is an array of the
4394 appropriate size. */
4395 tree rtype
= TYPE_DEBUG_REPRESENTATION_TYPE (type
);
4396 if (rtype
&& TYPE_DOMAIN (TREE_TYPE (TYPE_FIELDS (rtype
))))
4397 max_index
= array_type_nelts (TREE_TYPE (TYPE_FIELDS
4401 if (!reshape_init_array (TREE_TYPE (type
), max_index
,
4403 return error_mark_node
;
4408 /* The initializers were placed in reverse order in the
4410 CONSTRUCTOR_ELTS (new_init
) = nreverse (CONSTRUCTOR_ELTS (new_init
));
4412 if (TREE_CODE (old_init
) == TREE_LIST
)
4413 new_init
= build_tree_list (TREE_PURPOSE (old_init
), new_init
);
4416 /* If this was a brace-enclosed initializer and all of the
4417 initializers were not used up, there is a problem. */
4418 if (brace_enclosed_p
&& *initp
)
4419 error ("too many initializers for `%T'", type
);
4424 /* Verify INIT (the initializer for DECL), and record the
4425 initialization in DECL_INITIAL, if appropriate. CLEANUP is as for
4426 grok_reference_init.
4428 If the return value is non-NULL, it is an expression that must be
4429 evaluated dynamically to initialize DECL. */
4432 check_initializer (tree decl
, tree init
, int flags
, tree
*cleanup
)
4434 tree type
= TREE_TYPE (decl
);
4435 tree init_code
= NULL
;
4437 /* If `start_decl' didn't like having an initialization, ignore it now. */
4438 if (init
!= NULL_TREE
&& DECL_INITIAL (decl
) == NULL_TREE
)
4441 /* If an initializer is present, DECL_INITIAL has been
4442 error_mark_node, to indicate that an as-of-yet unevaluated
4443 initialization will occur. From now on, DECL_INITIAL reflects
4444 the static initialization -- if any -- of DECL. */
4445 DECL_INITIAL (decl
) = NULL_TREE
;
4447 /* Things that are going to be initialized need to have complete
4449 TREE_TYPE (decl
) = type
= complete_type (TREE_TYPE (decl
));
4451 if (type
== error_mark_node
)
4452 /* We will have already complained. */
4454 else if (init
&& COMPLETE_TYPE_P (type
)
4455 && !TREE_CONSTANT (TYPE_SIZE (type
)))
4457 error ("variable-sized object `%D' may not be initialized", decl
);
4460 else if (TREE_CODE (type
) == ARRAY_TYPE
4461 && !COMPLETE_TYPE_P (complete_type (TREE_TYPE (type
))))
4463 error ("elements of array `%#D' have incomplete type", decl
);
4466 else if (TREE_CODE (type
) != ARRAY_TYPE
&& !COMPLETE_TYPE_P (type
))
4468 error ("`%D' has incomplete type", decl
);
4469 TREE_TYPE (decl
) = error_mark_node
;
4473 if (TREE_CODE (decl
) == CONST_DECL
)
4475 gcc_assert (TREE_CODE (decl
) != REFERENCE_TYPE
);
4477 DECL_INITIAL (decl
) = init
;
4479 gcc_assert (init
!= NULL_TREE
);
4482 else if (!DECL_EXTERNAL (decl
) && TREE_CODE (type
) == REFERENCE_TYPE
)
4483 init
= grok_reference_init (decl
, type
, init
, cleanup
);
4486 if (TREE_CODE (init
) == CONSTRUCTOR
4487 && BRACE_ENCLOSED_INITIALIZER_P (init
))
4489 /* [dcl.init] paragraph 13,
4490 If T is a scalar type, then a declaration of the form
4495 reshape_init will complain about the extra braces,
4496 and doesn't do anything useful in the case where TYPE is
4497 scalar, so just don't call it. */
4498 if (CP_AGGREGATE_TYPE_P (type
))
4499 init
= reshape_init (type
, &init
);
4501 if ((*targetm
.vector_opaque_p
) (type
))
4503 error ("opaque vector types cannot be initialized");
4504 init
= error_mark_node
;
4508 /* If DECL has an array type without a specific bound, deduce the
4509 array size from the initializer. */
4510 maybe_deduce_size_from_array_init (decl
, init
);
4511 type
= TREE_TYPE (decl
);
4513 if (TYPE_HAS_CONSTRUCTOR (type
) || TYPE_NEEDS_CONSTRUCTING (type
))
4515 if (TREE_CODE (type
) == ARRAY_TYPE
)
4516 goto initialize_aggr
;
4517 else if (TREE_CODE (init
) == CONSTRUCTOR
4518 && BRACE_ENCLOSED_INITIALIZER_P (init
))
4520 if (TYPE_NON_AGGREGATE_CLASS (type
))
4522 error ("`%D' must be initialized by constructor, not by `{...}'",
4524 init
= error_mark_node
;
4527 goto dont_use_constructor
;
4531 int saved_stmts_are_full_exprs_p
;
4534 saved_stmts_are_full_exprs_p
= 0;
4535 if (building_stmt_tree ())
4537 saved_stmts_are_full_exprs_p
= stmts_are_full_exprs_p ();
4538 current_stmt_tree ()->stmts_are_full_exprs_p
= 1;
4540 init
= build_aggr_init (decl
, init
, flags
);
4541 if (building_stmt_tree ())
4542 current_stmt_tree ()->stmts_are_full_exprs_p
=
4543 saved_stmts_are_full_exprs_p
;
4549 dont_use_constructor
:
4550 if (TREE_CODE (init
) != TREE_VEC
)
4552 init_code
= store_init_value (decl
, init
);
4557 else if (DECL_EXTERNAL (decl
))
4559 else if (TYPE_P (type
) && TYPE_NEEDS_CONSTRUCTING (type
))
4560 goto initialize_aggr
;
4561 else if (IS_AGGR_TYPE (type
))
4563 tree core_type
= strip_array_types (type
);
4565 if (CLASSTYPE_READONLY_FIELDS_NEED_INIT (core_type
))
4566 error ("structure `%D' with uninitialized const members", decl
);
4567 if (CLASSTYPE_REF_FIELDS_NEED_INIT (core_type
))
4568 error ("structure `%D' with uninitialized reference members",
4571 check_for_uninitialized_const_var (decl
);
4574 check_for_uninitialized_const_var (decl
);
4576 if (init
&& init
!= error_mark_node
)
4577 init_code
= build2 (INIT_EXPR
, type
, decl
, init
);
4582 /* If DECL is not a local variable, give it RTL. */
4585 make_rtl_for_nonlocal_decl (tree decl
, tree init
, const char* asmspec
)
4587 int toplev
= toplevel_bindings_p ();
4590 /* Set the DECL_ASSEMBLER_NAME for the object. */
4593 /* The `register' keyword, when used together with an
4594 asm-specification, indicates that the variable should be
4595 placed in a particular register. */
4596 if (TREE_CODE (decl
) == VAR_DECL
&& DECL_REGISTER (decl
))
4598 change_decl_assembler_name (decl
, get_identifier (asmspec
));
4599 DECL_HARD_REGISTER (decl
) = 1;
4602 set_user_assembler_name (decl
, asmspec
);
4605 /* Handle non-variables up front. */
4606 if (TREE_CODE (decl
) != VAR_DECL
)
4608 rest_of_decl_compilation (decl
, toplev
, at_eof
);
4612 /* If we see a class member here, it should be a static data
4614 if (DECL_LANG_SPECIFIC (decl
) && DECL_IN_AGGR_P (decl
))
4616 gcc_assert (TREE_STATIC (decl
));
4617 /* An in-class declaration of a static data member should be
4618 external; it is only a declaration, and not a definition. */
4619 if (init
== NULL_TREE
)
4620 gcc_assert (DECL_EXTERNAL (decl
));
4623 /* We don't create any RTL for local variables. */
4624 if (DECL_FUNCTION_SCOPE_P (decl
) && !TREE_STATIC (decl
))
4627 /* We defer emission of local statics until the corresponding
4628 DECL_EXPR is expanded. */
4629 defer_p
= DECL_FUNCTION_SCOPE_P (decl
) || DECL_VIRTUAL_P (decl
);
4631 /* We try to defer namespace-scope static constants so that they are
4632 not emitted into the object file unnecessarily. */
4633 if (!DECL_VIRTUAL_P (decl
)
4634 && TREE_READONLY (decl
)
4635 && DECL_INITIAL (decl
) != NULL_TREE
4636 && DECL_INITIAL (decl
) != error_mark_node
4637 && ! EMPTY_CONSTRUCTOR_P (DECL_INITIAL (decl
))
4639 && !TREE_PUBLIC (decl
))
4641 /* Fool with the linkage of static consts according to #pragma
4643 struct c_fileinfo
*finfo
= get_fileinfo (lbasename (input_filename
));
4644 if (!finfo
->interface_unknown
&& !TREE_PUBLIC (decl
))
4646 TREE_PUBLIC (decl
) = 1;
4647 DECL_EXTERNAL (decl
) = finfo
->interface_only
;
4652 /* Likewise for template instantiations. */
4653 else if (DECL_LANG_SPECIFIC (decl
)
4654 && DECL_IMPLICIT_INSTANTIATION (decl
))
4657 /* If we're not deferring, go ahead and assemble the variable. */
4659 rest_of_decl_compilation (decl
, toplev
, at_eof
);
4662 /* Generate code to initialize DECL (a local variable). */
4665 initialize_local_var (tree decl
, tree init
)
4667 tree type
= TREE_TYPE (decl
);
4670 gcc_assert (TREE_CODE (decl
) == VAR_DECL
4671 || TREE_CODE (decl
) == RESULT_DECL
);
4672 gcc_assert (!TREE_STATIC (decl
));
4674 if (DECL_SIZE (decl
) == NULL_TREE
)
4676 /* If we used it already as memory, it must stay in memory. */
4677 DECL_INITIAL (decl
) = NULL_TREE
;
4678 TREE_ADDRESSABLE (decl
) = TREE_USED (decl
);
4681 if (DECL_SIZE (decl
) && type
!= error_mark_node
)
4685 /* Compute and store the initial value. */
4686 already_used
= TREE_USED (decl
) || TREE_USED (type
);
4688 /* Perform the initialization. */
4691 int saved_stmts_are_full_exprs_p
;
4693 gcc_assert (building_stmt_tree ());
4694 saved_stmts_are_full_exprs_p
= stmts_are_full_exprs_p ();
4695 current_stmt_tree ()->stmts_are_full_exprs_p
= 1;
4696 finish_expr_stmt (init
);
4697 current_stmt_tree ()->stmts_are_full_exprs_p
=
4698 saved_stmts_are_full_exprs_p
;
4701 /* Set this to 0 so we can tell whether an aggregate which was
4702 initialized was ever used. Don't do this if it has a
4703 destructor, so we don't complain about the 'resource
4704 allocation is initialization' idiom. Now set
4705 attribute((unused)) on types so decls of that type will be
4706 marked used. (see TREE_USED, above.) */
4707 if (TYPE_NEEDS_CONSTRUCTING (type
)
4709 && TYPE_HAS_TRIVIAL_DESTRUCTOR (type
)
4710 && DECL_NAME (decl
))
4711 TREE_USED (decl
) = 0;
4712 else if (already_used
)
4713 TREE_USED (decl
) = 1;
4716 /* Generate a cleanup, if necessary. */
4717 cleanup
= cxx_maybe_build_cleanup (decl
);
4718 if (DECL_SIZE (decl
) && cleanup
)
4719 finish_decl_cleanup (decl
, cleanup
);
4722 /* DECL is a VAR_DECL for a compiler-generated variable with static
4723 storage duration (like a virtual table) whose initializer is a
4724 compile-time constant. Initialize the variable and provide it to
4728 initialize_artificial_var (tree decl
, tree init
)
4730 DECL_INITIAL (decl
) = build_constructor (NULL_TREE
, init
);
4731 DECL_INITIALIZED_P (decl
) = 1;
4732 determine_visibility (decl
);
4733 layout_var_decl (decl
);
4734 maybe_commonize_var (decl
);
4735 make_rtl_for_nonlocal_decl (decl
, init
, /*asmspec=*/NULL
);
4738 /* Finish processing of a declaration;
4739 install its line number and initial value.
4740 If the length of an array type is not known before,
4741 it must be determined now, from the initial value, or it is an error.
4743 INIT holds the value of an initializer that should be allowed to escape
4746 FLAGS is LOOKUP_ONLYCONVERTING if the = init syntax was used, else 0
4747 if the (init) syntax was used. */
4750 cp_finish_decl (tree decl
, tree init
, tree asmspec_tree
, int flags
)
4753 tree ttype
= NULL_TREE
;
4755 const char *asmspec
= NULL
;
4756 int was_readonly
= 0;
4758 if (decl
== error_mark_node
)
4763 error ("assignment (not initialization) in declaration");
4767 gcc_assert (TREE_CODE (decl
) != RESULT_DECL
);
4769 /* Assume no cleanup is required. */
4770 cleanup
= NULL_TREE
;
4772 /* If a name was specified, get the string. */
4773 if (global_scope_p (current_binding_level
))
4774 asmspec_tree
= maybe_apply_renaming_pragma (decl
, asmspec_tree
);
4776 asmspec
= TREE_STRING_POINTER (asmspec_tree
);
4778 if (init
&& TREE_CODE (init
) == NAMESPACE_DECL
)
4780 error ("cannot initialize `%D' to namespace `%D'",
4785 if (current_class_type
4786 && CP_DECL_CONTEXT (decl
) == current_class_type
4787 && TYPE_BEING_DEFINED (current_class_type
)
4788 && (DECL_INITIAL (decl
) || init
))
4789 DECL_INITIALIZED_IN_CLASS_P (decl
) = 1;
4791 type
= TREE_TYPE (decl
);
4793 if (type
== error_mark_node
)
4796 if (TYPE_HAS_MUTABLE_P (type
))
4797 TREE_READONLY (decl
) = 0;
4799 if (processing_template_decl
)
4801 /* Add this declaration to the statement-tree. */
4802 if (at_function_scope_p ())
4803 add_decl_expr (decl
);
4805 if (init
&& DECL_INITIAL (decl
))
4806 DECL_INITIAL (decl
) = init
;
4807 if (TREE_CODE (decl
) == VAR_DECL
4808 && !DECL_PRETTY_FUNCTION_P (decl
)
4809 && !dependent_type_p (TREE_TYPE (decl
)))
4810 maybe_deduce_size_from_array_init (decl
, init
);
4814 /* Parameters are handled by store_parm_decls, not cp_finish_decl. */
4815 gcc_assert (TREE_CODE (decl
) != PARM_DECL
);
4817 /* Take care of TYPE_DECLs up front. */
4818 if (TREE_CODE (decl
) == TYPE_DECL
)
4820 if (type
!= error_mark_node
4821 && IS_AGGR_TYPE (type
) && DECL_NAME (decl
))
4823 if (TREE_TYPE (DECL_NAME (decl
)) && TREE_TYPE (decl
) != type
)
4824 warning ("shadowing previous type declaration of `%#D'", decl
);
4825 set_identifier_type_value (DECL_NAME (decl
), decl
);
4828 /* If we have installed this as the canonical typedef for this
4829 type, and that type has not been defined yet, delay emitting
4830 the debug information for it, as we will emit it later. */
4831 if (TYPE_MAIN_DECL (TREE_TYPE (decl
)) == decl
4832 && !COMPLETE_TYPE_P (TREE_TYPE (decl
)))
4833 TYPE_DECL_SUPPRESS_DEBUG (decl
) = 1;
4835 rest_of_decl_compilation (decl
, DECL_CONTEXT (decl
) == NULL_TREE
,
4840 if (TREE_CODE (decl
) != FUNCTION_DECL
)
4841 ttype
= target_type (type
);
4844 /* Currently, GNU C++ puts constants in text space, making them
4845 impossible to initialize. In the future, one would hope for
4846 an operating system which understood the difference between
4847 initialization and the running of a program. */
4848 if (! DECL_EXTERNAL (decl
) && TREE_READONLY (decl
))
4851 if (TYPE_NEEDS_CONSTRUCTING (type
)
4852 || TREE_CODE (type
) == REFERENCE_TYPE
)
4853 TREE_READONLY (decl
) = 0;
4856 if (TREE_CODE (decl
) == VAR_DECL
)
4858 /* Only PODs can have thread-local storage. Other types may require
4859 various kinds of non-trivial initialization. */
4860 if (DECL_THREAD_LOCAL (decl
) && !pod_type_p (TREE_TYPE (decl
)))
4861 error ("`%D' cannot be thread-local because it has non-POD type `%T'",
4862 decl
, TREE_TYPE (decl
));
4863 /* Convert the initializer to the type of DECL, if we have not
4864 already initialized DECL. */
4865 if (!DECL_INITIALIZED_P (decl
)
4866 /* If !DECL_EXTERNAL then DECL is being defined. In the
4867 case of a static data member initialized inside the
4868 class-specifier, there can be an initializer even if DECL
4869 is *not* defined. */
4870 && (!DECL_EXTERNAL (decl
) || init
))
4872 init
= check_initializer (decl
, init
, flags
, &cleanup
);
4873 /* Thread-local storage cannot be dynamically initialized. */
4874 if (DECL_THREAD_LOCAL (decl
) && init
)
4876 error ("`%D' is thread-local and so cannot be dynamically "
4877 "initialized", decl
);
4884 The memory occupied by any object of static storage
4885 duration is zero-initialized at program startup before
4886 any other initialization takes place.
4888 We cannot create an appropriate initializer until after
4889 the type of DECL is finalized. If DECL_INITIAL is set,
4890 then the DECL is statically initialized, and any
4891 necessary zero-initialization has already been performed. */
4892 if (TREE_STATIC (decl
) && !DECL_INITIAL (decl
))
4893 DECL_INITIAL (decl
) = build_zero_init (TREE_TYPE (decl
),
4894 /*nelts=*/NULL_TREE
,
4895 /*static_storage_p=*/true);
4896 /* Remember that the initialization for this variable has
4898 DECL_INITIALIZED_P (decl
) = 1;
4899 /* The variable is being defined, so determine its
4901 determine_visibility (decl
);
4903 /* If the variable has an array type, lay out the type, even if
4904 there is no initializer. It is valid to index through the
4905 array, and we must get TYPE_ALIGN set correctly on the array
4907 else if (TREE_CODE (type
) == ARRAY_TYPE
)
4911 /* Add this declaration to the statement-tree. This needs to happen
4912 after the call to check_initializer so that the DECL_EXPR for a
4913 reference temp is added before the DECL_EXPR for the reference itself. */
4914 if (at_function_scope_p ())
4915 add_decl_expr (decl
);
4917 if (TREE_CODE (decl
) == VAR_DECL
)
4918 layout_var_decl (decl
);
4920 /* Output the assembler code and/or RTL code for variables and functions,
4921 unless the type is an undefined structure or union.
4922 If not, it will get done when the type is completed. */
4923 if (TREE_CODE (decl
) == VAR_DECL
|| TREE_CODE (decl
) == FUNCTION_DECL
)
4925 if (TREE_CODE (decl
) == VAR_DECL
)
4926 maybe_commonize_var (decl
);
4928 make_rtl_for_nonlocal_decl (decl
, init
, asmspec
);
4930 /* Check for abstractness of the type. Notice that there is no
4931 need to strip array types here since the check for those types
4932 is already done within create_array_type_for_decl. */
4933 if (TREE_CODE (type
) == FUNCTION_TYPE
4934 || TREE_CODE (type
) == METHOD_TYPE
)
4935 abstract_virtuals_error (decl
, TREE_TYPE (type
));
4937 abstract_virtuals_error (decl
, type
);
4939 if (TREE_CODE (decl
) == FUNCTION_DECL
4940 || TREE_TYPE (decl
) == error_mark_node
)
4941 /* No initialization required. */
4943 else if (DECL_EXTERNAL (decl
)
4944 && ! (DECL_LANG_SPECIFIC (decl
)
4945 && DECL_NOT_REALLY_EXTERN (decl
)))
4948 DECL_INITIAL (decl
) = init
;
4952 /* A variable definition. */
4953 if (DECL_FUNCTION_SCOPE_P (decl
))
4955 /* Initialize the local variable. */
4956 if (processing_template_decl
)
4958 if (init
|| DECL_INITIAL (decl
) == error_mark_node
)
4959 DECL_INITIAL (decl
) = init
;
4961 else if (!TREE_STATIC (decl
))
4962 initialize_local_var (decl
, init
);
4965 if (TREE_STATIC (decl
))
4966 expand_static_init (decl
, init
);
4970 /* If a CLEANUP_STMT was created to destroy a temporary bound to a
4971 reference, insert it in the statement-tree now. */
4973 push_cleanup (decl
, cleanup
, false);
4978 TREE_READONLY (decl
) = 1;
4980 /* If this was marked 'used', be sure it will be output. */
4981 if (lookup_attribute ("used", DECL_ATTRIBUTES (decl
)))
4982 mark_decl_referenced (decl
);
4985 /* This is here for a midend callback from c-common.c. */
4988 finish_decl (tree decl
, tree init
, tree asmspec_tree
)
4990 cp_finish_decl (decl
, init
, asmspec_tree
, 0);
4993 /* Returns a declaration for a VAR_DECL as if:
4995 extern "C" TYPE NAME;
4997 had been seen. Used to create compiler-generated global
5001 declare_global_var (tree name
, tree type
)
5005 push_to_top_level ();
5006 decl
= build_decl (VAR_DECL
, name
, type
);
5007 TREE_PUBLIC (decl
) = 1;
5008 DECL_EXTERNAL (decl
) = 1;
5009 DECL_ARTIFICIAL (decl
) = 1;
5011 cp_finish_decl (decl
, NULL_TREE
, NULL_TREE
, 0);
5012 pop_from_top_level ();
5017 /* Returns a pointer to the `atexit' function. Note that if
5018 FLAG_USE_CXA_ATEXIT is nonzero, then this will actually be the new
5019 `__cxa_atexit' function specified in the IA64 C++ ABI. */
5022 get_atexit_node (void)
5033 if (flag_use_cxa_atexit
)
5035 /* The declaration for `__cxa_atexit' is:
5037 int __cxa_atexit (void (*)(void *), void *, void *)
5039 We build up the argument types and then then function type
5042 /* First, build the pointer-to-function type for the first
5044 arg_types
= tree_cons (NULL_TREE
, ptr_type_node
, void_list_node
);
5045 fn_type
= build_function_type (void_type_node
, arg_types
);
5046 fn_ptr_type
= build_pointer_type (fn_type
);
5047 /* Then, build the rest of the argument types. */
5048 arg_types
= tree_cons (NULL_TREE
, ptr_type_node
, void_list_node
);
5049 arg_types
= tree_cons (NULL_TREE
, ptr_type_node
, arg_types
);
5050 arg_types
= tree_cons (NULL_TREE
, fn_ptr_type
, arg_types
);
5051 /* And the final __cxa_atexit type. */
5052 fn_type
= build_function_type (integer_type_node
, arg_types
);
5053 fn_ptr_type
= build_pointer_type (fn_type
);
5054 name
= "__cxa_atexit";
5058 /* The declaration for `atexit' is:
5060 int atexit (void (*)());
5062 We build up the argument types and then then function type
5064 fn_type
= build_function_type (void_type_node
, void_list_node
);
5065 fn_ptr_type
= build_pointer_type (fn_type
);
5066 arg_types
= tree_cons (NULL_TREE
, fn_ptr_type
, void_list_node
);
5067 /* Build the final atexit type. */
5068 fn_type
= build_function_type (integer_type_node
, arg_types
);
5072 /* Now, build the function declaration. */
5073 push_lang_context (lang_name_c
);
5074 atexit_fndecl
= build_library_fn_ptr (name
, fn_type
);
5075 mark_used (atexit_fndecl
);
5076 pop_lang_context ();
5077 atexit_node
= decay_conversion (atexit_fndecl
);
5082 /* Returns the __dso_handle VAR_DECL. */
5085 get_dso_handle_node (void)
5087 if (dso_handle_node
)
5088 return dso_handle_node
;
5090 /* Declare the variable. */
5091 dso_handle_node
= declare_global_var (get_identifier ("__dso_handle"),
5094 return dso_handle_node
;
5097 /* Begin a new function with internal linkage whose job will be simply
5098 to destroy some particular variable. */
5100 static GTY(()) int start_cleanup_cnt
;
5103 start_cleanup_fn (void)
5110 push_to_top_level ();
5112 /* No need to mangle this. */
5113 push_lang_context (lang_name_c
);
5115 /* Build the parameter-types. */
5116 parmtypes
= void_list_node
;
5117 /* Functions passed to __cxa_atexit take an additional parameter.
5118 We'll just ignore it. After we implement the new calling
5119 convention for destructors, we can eliminate the use of
5120 additional cleanup functions entirely in the -fnew-abi case. */
5121 if (flag_use_cxa_atexit
)
5122 parmtypes
= tree_cons (NULL_TREE
, ptr_type_node
, parmtypes
);
5123 /* Build the function type itself. */
5124 fntype
= build_function_type (void_type_node
, parmtypes
);
5125 /* Build the name of the function. */
5126 sprintf (name
, "__tcf_%d", start_cleanup_cnt
++);
5127 /* Build the function declaration. */
5128 fndecl
= build_lang_decl (FUNCTION_DECL
, get_identifier (name
), fntype
);
5129 /* It's a function with internal linkage, generated by the
5131 TREE_PUBLIC (fndecl
) = 0;
5132 DECL_ARTIFICIAL (fndecl
) = 1;
5133 /* Make the function `inline' so that it is only emitted if it is
5134 actually needed. It is unlikely that it will be inlined, since
5135 it is only called via a function pointer, but we avoid unnecessary
5136 emissions this way. */
5137 DECL_INLINE (fndecl
) = 1;
5138 DECL_DECLARED_INLINE_P (fndecl
) = 1;
5139 DECL_INTERFACE_KNOWN (fndecl
) = 1;
5140 /* Build the parameter. */
5141 if (flag_use_cxa_atexit
)
5145 parmdecl
= cp_build_parm_decl (NULL_TREE
, ptr_type_node
);
5146 DECL_CONTEXT (parmdecl
) = fndecl
;
5147 TREE_USED (parmdecl
) = 1;
5148 DECL_ARGUMENTS (fndecl
) = parmdecl
;
5152 start_preparsed_function (fndecl
, NULL_TREE
, SF_PRE_PARSED
);
5154 pop_lang_context ();
5156 return current_function_decl
;
5159 /* Finish the cleanup function begun by start_cleanup_fn. */
5162 end_cleanup_fn (void)
5164 expand_or_defer_fn (finish_function (0));
5166 pop_from_top_level ();
5169 /* Generate code to handle the destruction of DECL, an object with
5170 static storage duration. */
5173 register_dtor_fn (tree decl
)
5180 if (TYPE_HAS_TRIVIAL_DESTRUCTOR (TREE_TYPE (decl
)))
5181 return void_zero_node
;
5183 /* Call build_cleanup before we enter the anonymous function so that
5184 any access checks will be done relative to the current scope,
5185 rather than the scope of the anonymous function. */
5186 build_cleanup (decl
);
5188 /* Now start the function. */
5189 cleanup
= start_cleanup_fn ();
5191 /* Now, recompute the cleanup. It may contain SAVE_EXPRs that refer
5192 to the original function, rather than the anonymous one. That
5193 will make the back-end think that nested functions are in use,
5194 which causes confusion. */
5196 push_deferring_access_checks (dk_no_check
);
5197 fcall
= build_cleanup (decl
);
5198 pop_deferring_access_checks ();
5200 /* Create the body of the anonymous function. */
5201 compound_stmt
= begin_compound_stmt (BCS_FN_BODY
);
5202 finish_expr_stmt (fcall
);
5203 finish_compound_stmt (compound_stmt
);
5206 /* Call atexit with the cleanup function. */
5207 cxx_mark_addressable (cleanup
);
5208 mark_used (cleanup
);
5209 cleanup
= build_unary_op (ADDR_EXPR
, cleanup
, 0);
5210 if (flag_use_cxa_atexit
)
5212 args
= tree_cons (NULL_TREE
,
5213 build_unary_op (ADDR_EXPR
, get_dso_handle_node (), 0),
5215 args
= tree_cons (NULL_TREE
, null_pointer_node
, args
);
5216 args
= tree_cons (NULL_TREE
, cleanup
, args
);
5219 args
= tree_cons (NULL_TREE
, cleanup
, NULL_TREE
);
5220 return build_function_call (get_atexit_node (), args
);
5223 /* DECL is a VAR_DECL with static storage duration. INIT, if present,
5224 is its initializer. Generate code to handle the construction
5225 and destruction of DECL. */
5228 expand_static_init (tree decl
, tree init
)
5230 gcc_assert (TREE_CODE (decl
) == VAR_DECL
);
5231 gcc_assert (TREE_STATIC (decl
));
5233 /* Some variables require no initialization. */
5235 && !TYPE_NEEDS_CONSTRUCTING (TREE_TYPE (decl
))
5236 && TYPE_HAS_TRIVIAL_DESTRUCTOR (TREE_TYPE (decl
)))
5239 if (DECL_FUNCTION_SCOPE_P (decl
))
5241 /* Emit code to perform this initialization but once. */
5242 tree if_stmt
, inner_if_stmt
= NULL_TREE
;
5243 tree then_clause
, inner_then_clause
= NULL_TREE
;
5244 tree guard
, guard_addr
, guard_addr_list
;
5245 tree acquire_fn
, release_fn
, abort_fn
;
5248 /* Emit code to perform this initialization but once. This code
5251 static <type> guard;
5252 if (!guard.first_byte) {
5253 if (__cxa_guard_acquire (&guard)) {
5256 // Do initialization.
5257 flag = true; __cxa_guard_release (&guard);
5258 // Register variable for destruction at end of program.
5260 if (!flag) __cxa_guard_abort (&guard);
5264 Note that the `flag' variable is only set to 1 *after* the
5265 initialization is complete. This ensures that an exception,
5266 thrown during the construction, will cause the variable to
5267 reinitialized when we pass through this code again, as per:
5271 If the initialization exits by throwing an exception, the
5272 initialization is not complete, so it will be tried again
5273 the next time control enters the declaration.
5275 This process should be thread-safe, too; multiple threads
5276 should not be able to initialize the variable more than
5279 /* Create the guard variable. */
5280 guard
= get_guard (decl
);
5282 /* Begin the conditional initialization. */
5283 if_stmt
= begin_if_stmt ();
5284 finish_if_stmt_cond (get_guard_cond (guard
), if_stmt
);
5285 then_clause
= begin_compound_stmt (BCS_NO_SCOPE
);
5287 if (flag_threadsafe_statics
)
5289 guard_addr
= build_address (guard
);
5290 guard_addr_list
= build_tree_list (NULL_TREE
, guard_addr
);
5292 acquire_fn
= get_identifier ("__cxa_guard_acquire");
5293 release_fn
= get_identifier ("__cxa_guard_release");
5294 abort_fn
= get_identifier ("__cxa_guard_abort");
5295 if (!get_global_value_if_present (acquire_fn
, &acquire_fn
))
5297 tree argtypes
= tree_cons (NULL_TREE
, TREE_TYPE (guard_addr
),
5299 tree vfntype
= build_function_type (void_type_node
, argtypes
);
5300 acquire_fn
= push_library_fn
5301 (acquire_fn
, build_function_type (integer_type_node
, argtypes
));
5302 release_fn
= push_library_fn (release_fn
, vfntype
);
5303 abort_fn
= push_library_fn (abort_fn
, vfntype
);
5307 release_fn
= identifier_global_value (release_fn
);
5308 abort_fn
= identifier_global_value (abort_fn
);
5311 inner_if_stmt
= begin_if_stmt ();
5312 finish_if_stmt_cond (build_call (acquire_fn
, guard_addr_list
),
5315 inner_then_clause
= begin_compound_stmt (BCS_NO_SCOPE
);
5316 begin
= get_target_expr (boolean_false_node
);
5317 flag
= TARGET_EXPR_SLOT (begin
);
5319 TARGET_EXPR_CLEANUP (begin
)
5320 = build (COND_EXPR
, void_type_node
, flag
,
5322 build_call (abort_fn
, guard_addr_list
));
5323 CLEANUP_EH_ONLY (begin
) = 1;
5325 /* Do the initialization itself. */
5326 init
= add_stmt_to_compound (begin
, init
);
5327 init
= add_stmt_to_compound
5328 (init
, build (MODIFY_EXPR
, void_type_node
, flag
, boolean_true_node
));
5329 init
= add_stmt_to_compound
5330 (init
, build_call (release_fn
, guard_addr_list
));
5333 init
= add_stmt_to_compound (init
, set_guard (guard
));
5335 /* Use atexit to register a function for destroying this static
5337 init
= add_stmt_to_compound (init
, register_dtor_fn (decl
));
5339 finish_expr_stmt (init
);
5341 if (flag_threadsafe_statics
)
5343 finish_compound_stmt (inner_then_clause
);
5344 finish_then_clause (inner_if_stmt
);
5345 finish_if_stmt (inner_if_stmt
);
5348 finish_compound_stmt (then_clause
);
5349 finish_then_clause (if_stmt
);
5350 finish_if_stmt (if_stmt
);
5353 static_aggregates
= tree_cons (init
, decl
, static_aggregates
);
5357 /* Make TYPE a complete type based on INITIAL_VALUE.
5358 Return 0 if successful, 1 if INITIAL_VALUE can't be deciphered,
5359 2 if there was no information (in which case assume 0 if DO_DEFAULT). */
5362 complete_array_type (tree type
, tree initial_value
, int do_default
)
5364 tree maxindex
= NULL_TREE
;
5369 /* An array of character type can be initialized from a
5370 brace-enclosed string constant. */
5371 if (char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (type
)))
5372 && TREE_CODE (initial_value
) == CONSTRUCTOR
5373 && CONSTRUCTOR_ELTS (initial_value
)
5374 && (TREE_CODE (TREE_VALUE (CONSTRUCTOR_ELTS (initial_value
)))
5376 && TREE_CHAIN (CONSTRUCTOR_ELTS (initial_value
)) == NULL_TREE
)
5377 initial_value
= TREE_VALUE (CONSTRUCTOR_ELTS (initial_value
));
5379 /* Note MAXINDEX is really the maximum index, one less than the
5381 if (TREE_CODE (initial_value
) == STRING_CST
)
5384 = int_size_in_bytes (TREE_TYPE (TREE_TYPE (initial_value
)));
5385 maxindex
= build_int_cst (NULL_TREE
,
5386 (TREE_STRING_LENGTH (initial_value
)
5389 else if (TREE_CODE (initial_value
) == CONSTRUCTOR
)
5391 tree elts
= CONSTRUCTOR_ELTS (initial_value
);
5393 maxindex
= ssize_int (-1);
5394 for (; elts
; elts
= TREE_CHAIN (elts
))
5396 if (TREE_PURPOSE (elts
))
5397 maxindex
= TREE_PURPOSE (elts
);
5399 maxindex
= size_binop (PLUS_EXPR
, maxindex
, ssize_int (1));
5404 /* Make an error message unless that happened already. */
5405 if (initial_value
!= error_mark_node
)
5408 initial_value
= NULL_TREE
;
5410 /* Prevent further error messages. */
5411 maxindex
= build_int_cst (NULL_TREE
, 0);
5418 maxindex
= build_int_cst (NULL_TREE
, 0);
5428 domain
= build_index_type (maxindex
);
5429 TYPE_DOMAIN (type
) = domain
;
5432 itype
= TREE_TYPE (initial_value
);
5435 if (itype
&& !TYPE_DOMAIN (itype
))
5436 TYPE_DOMAIN (itype
) = domain
;
5437 /* The type of the main variant should never be used for arrays
5438 of different sizes. It should only ever be completed with the
5439 size of the array. */
5440 if (! TYPE_DOMAIN (TYPE_MAIN_VARIANT (type
)))
5441 TYPE_DOMAIN (TYPE_MAIN_VARIANT (type
)) = domain
;
5443 elt_type
= TREE_TYPE (type
);
5444 TYPE_NEEDS_CONSTRUCTING (type
)
5445 = TYPE_NEEDS_CONSTRUCTING (TYPE_MAIN_VARIANT (elt_type
));
5446 TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type
)
5447 = TYPE_HAS_NONTRIVIAL_DESTRUCTOR (TYPE_MAIN_VARIANT (elt_type
));
5450 /* Lay out the type now that we can get the real answer. */
5457 /* Return zero if something is declared to be a member of type
5458 CTYPE when in the context of CUR_TYPE. STRING is the error
5459 message to print in that case. Otherwise, quietly return 1. */
5462 member_function_or_else (tree ctype
, tree cur_type
, enum overload_flags flags
)
5464 if (ctype
&& ctype
!= cur_type
)
5466 if (flags
== DTOR_FLAG
)
5467 error ("destructor for alien class `%T' cannot be a member",
5470 error ("constructor for alien class `%T' cannot be a member",
5477 /* Subroutine of `grokdeclarator'. */
5479 /* Generate errors possibly applicable for a given set of specifiers.
5480 This is for ARM $7.1.2. */
5483 bad_specifiers (tree object
,
5492 error ("`%D' declared as a `virtual' %s", object
, type
);
5494 error ("`%D' declared as an `inline' %s", object
, type
);
5496 error ("`const' and `volatile' function specifiers on `%D' invalid in %s declaration",
5499 cp_error_at ("`%D' declared as a friend", object
);
5501 && (TREE_CODE (object
) == TYPE_DECL
5502 || (!TYPE_PTRFN_P (TREE_TYPE (object
))
5503 && !TYPE_REFFN_P (TREE_TYPE (object
))
5504 && !TYPE_PTRMEMFUNC_P (TREE_TYPE (object
)))))
5505 cp_error_at ("`%D' declared with an exception specification", object
);
5508 /* CTYPE is class type, or null if non-class.
5509 TYPE is type this FUNCTION_DECL should have, either FUNCTION_TYPE
5511 DECLARATOR is the function's name.
5512 PARMS is a chain of PARM_DECLs for the function.
5513 VIRTUALP is truthvalue of whether the function is virtual or not.
5514 FLAGS are to be passed through to `grokclassfn'.
5515 QUALS are qualifiers indicating whether the function is `const'
5517 RAISES is a list of exceptions that this function can raise.
5518 CHECK is 1 if we must find this method in CTYPE, 0 if we should
5519 not look, and -1 if we should not call `grokclassfn' at all.
5521 Returns `NULL_TREE' if something goes wrong, after issuing
5522 applicable error messages. */
5525 grokfndecl (tree ctype
,
5529 tree orig_declarator
,
5531 enum overload_flags flags
,
5544 int staticp
= ctype
&& TREE_CODE (type
) == FUNCTION_TYPE
;
5545 int has_default_arg
= 0;
5549 type
= build_exception_variant (type
, raises
);
5551 decl
= build_lang_decl (FUNCTION_DECL
, declarator
, type
);
5552 DECL_ARGUMENTS (decl
) = parms
;
5553 /* Propagate volatile out from type to decl. */
5554 if (TYPE_VOLATILE (type
))
5555 TREE_THIS_VOLATILE (decl
) = 1;
5557 /* If this decl has namespace scope, set that up. */
5559 set_decl_namespace (decl
, in_namespace
, friendp
);
5561 DECL_CONTEXT (decl
) = FROB_CONTEXT (current_namespace
);
5563 /* `main' and builtins have implicit 'C' linkage. */
5564 if ((MAIN_NAME_P (declarator
)
5565 || (IDENTIFIER_LENGTH (declarator
) > 10
5566 && IDENTIFIER_POINTER (declarator
)[0] == '_'
5567 && IDENTIFIER_POINTER (declarator
)[1] == '_'
5568 && strncmp (IDENTIFIER_POINTER (declarator
)+2, "builtin_", 8) == 0))
5569 && current_lang_name
== lang_name_cplusplus
5570 && ctype
== NULL_TREE
5571 /* NULL_TREE means global namespace. */
5572 && DECL_CONTEXT (decl
) == NULL_TREE
)
5573 SET_DECL_LANGUAGE (decl
, lang_c
);
5575 /* Should probably propagate const out from type to decl I bet (mrs). */
5578 DECL_STATIC_FUNCTION_P (decl
) = 1;
5579 DECL_CONTEXT (decl
) = ctype
;
5583 DECL_CONTEXT (decl
) = ctype
;
5585 if (ctype
== NULL_TREE
&& DECL_MAIN_P (decl
))
5587 if (processing_template_decl
)
5588 error ("cannot declare `::main' to be a template");
5590 error ("cannot declare `::main' to be inline");
5592 error ("cannot declare `::main' to be static");
5593 if (!same_type_p (TREE_TYPE (TREE_TYPE (decl
)),
5596 error ("`::main' must return `int'");
5597 TREE_TYPE (TREE_TYPE (decl
)) = integer_type_node
;
5603 /* Members of anonymous types and local classes have no linkage; make
5604 them internal. If a typedef is made later, this will be changed. */
5605 if (ctype
&& (TYPE_ANONYMOUS_P (ctype
)
5606 || decl_function_context (TYPE_MAIN_DECL (ctype
))))
5611 /* [basic.link]: A name with no linkage (notably, the name of a class
5612 or enumeration declared in a local scope) shall not be used to
5613 declare an entity with linkage.
5615 Only check this for public decls for now. See core 319, 389. */
5616 t
= no_linkage_check (TREE_TYPE (decl
),
5617 /*relaxed_p=*/false);
5620 if (TYPE_ANONYMOUS_P (t
))
5622 if (DECL_EXTERN_C_P (decl
))
5623 /* Allow this; it's pretty common in C. */;
5626 pedwarn ("non-local function `%#D' uses anonymous type",
5628 if (DECL_ORIGINAL_TYPE (TYPE_NAME (t
)))
5630 `%#D' does not refer to the unqualified type, so it is not used for linkage",
5635 pedwarn ("non-local function `%#D' uses local type `%T'",
5640 TREE_PUBLIC (decl
) = publicp
;
5643 DECL_INTERFACE_KNOWN (decl
) = 1;
5644 DECL_NOT_REALLY_EXTERN (decl
) = 1;
5647 /* If the declaration was declared inline, mark it as such. */
5649 DECL_DECLARED_INLINE_P (decl
) = 1;
5650 /* We inline functions that are explicitly declared inline, or, when
5651 the user explicitly asks us to, all functions. */
5652 if (DECL_DECLARED_INLINE_P (decl
)
5653 || (flag_inline_trees
== 2 && !DECL_INLINE (decl
) && funcdef_flag
))
5654 DECL_INLINE (decl
) = 1;
5656 DECL_EXTERNAL (decl
) = 1;
5657 if (quals
&& TREE_CODE (type
) == FUNCTION_TYPE
)
5659 error ("%smember function `%D' cannot have cv-qualifier",
5660 (ctype
? "static " : "non-"), decl
);
5661 quals
= TYPE_UNQUALIFIED
;
5664 if (IDENTIFIER_OPNAME_P (DECL_NAME (decl
)))
5665 grok_op_properties (decl
, friendp
, /*complain=*/true);
5667 if (ctype
&& decl_function_context (decl
))
5668 DECL_NO_STATIC_CHAIN (decl
) = 1;
5670 for (t
= TYPE_ARG_TYPES (TREE_TYPE (decl
)); t
; t
= TREE_CHAIN (t
))
5671 if (TREE_PURPOSE (t
)
5672 && TREE_CODE (TREE_PURPOSE (t
)) == DEFAULT_ARG
)
5674 has_default_arg
= 1;
5679 && TREE_CODE (orig_declarator
) == TEMPLATE_ID_EXPR
)
5683 ("defining explicit specialization `%D' in friend declaration",
5687 tree fns
= TREE_OPERAND (orig_declarator
, 0);
5688 tree args
= TREE_OPERAND (orig_declarator
, 1);
5690 if (PROCESSING_REAL_TEMPLATE_DECL_P ())
5692 /* Something like `template <class T> friend void f<T>()'. */
5693 error ("invalid use of template-id `%D' in declaration of primary template",
5699 /* A friend declaration of the form friend void f<>(). Record
5700 the information in the TEMPLATE_ID_EXPR. */
5701 SET_DECL_IMPLICIT_INSTANTIATION (decl
);
5703 if (TREE_CODE (fns
) == COMPONENT_REF
)
5705 /* Due to bison parser ickiness, we will have already looked
5706 up an operator_name or PFUNCNAME within the current class
5707 (see template_id in parse.y). If the current class contains
5708 such a name, we'll get a COMPONENT_REF here. Undo that. */
5710 gcc_assert (TREE_TYPE (TREE_OPERAND (fns
, 0))
5711 == current_class_type
);
5712 fns
= TREE_OPERAND (fns
, 1);
5714 gcc_assert (TREE_CODE (fns
) == IDENTIFIER_NODE
5715 || TREE_CODE (fns
) == OVERLOAD
);
5716 DECL_TEMPLATE_INFO (decl
) = tree_cons (fns
, args
, NULL_TREE
);
5718 if (has_default_arg
)
5720 error ("default arguments are not allowed in declaration of friend template specialization `%D'",
5727 error ("`inline' is not allowed in declaration of friend template specialization `%D'",
5735 /* Make the init_value nonzero so pushdecl knows this is not
5736 tentative. error_mark_node is replaced later with the BLOCK. */
5737 DECL_INITIAL (decl
) = error_mark_node
;
5739 if (TYPE_NOTHROW_P (type
) || nothrow_libfn_p (decl
))
5740 TREE_NOTHROW (decl
) = 1;
5742 /* Caller will do the rest of this. */
5746 if (flags
== NO_SPECIAL
&& ctype
&& constructor_name_p (declarator
, ctype
))
5747 DECL_CONSTRUCTOR_P (decl
) = 1;
5749 /* Function gets the ugly name, field gets the nice one. This call
5750 may change the type of the function (because of default
5752 if (ctype
!= NULL_TREE
)
5753 grokclassfn (ctype
, decl
, flags
, quals
);
5755 decl
= check_explicit_specialization (orig_declarator
, decl
,
5757 2 * (funcdef_flag
!= 0) +
5758 4 * (friendp
!= 0));
5759 if (decl
== error_mark_node
)
5764 cplus_decl_attributes (&decl
, *attrlist
, 0);
5765 *attrlist
= NULL_TREE
;
5768 if (ctype
!= NULL_TREE
5769 && (! TYPE_FOR_JAVA (ctype
) || check_java_method (decl
))
5774 old_decl
= check_classfn (ctype
, decl
,
5775 (processing_template_decl
5776 > template_class_depth (ctype
))
5777 ? current_template_parms
5780 if (old_decl
&& TREE_CODE (old_decl
) == TEMPLATE_DECL
)
5781 /* Because grokfndecl is always supposed to return a
5782 FUNCTION_DECL, we pull out the DECL_TEMPLATE_RESULT
5783 here. We depend on our callers to figure out that its
5784 really a template that's being returned. */
5785 old_decl
= DECL_TEMPLATE_RESULT (old_decl
);
5787 if (old_decl
&& DECL_STATIC_FUNCTION_P (old_decl
)
5788 && TREE_CODE (TREE_TYPE (decl
)) == METHOD_TYPE
)
5789 /* Remove the `this' parm added by grokclassfn.
5790 XXX Isn't this done in start_function, too? */
5791 revert_static_member_fn (decl
);
5792 if (old_decl
&& DECL_ARTIFICIAL (old_decl
))
5793 error ("definition of implicitly-declared `%D'", old_decl
);
5800 /* Since we've smashed OLD_DECL to its
5801 DECL_TEMPLATE_RESULT, we must do the same to DECL. */
5802 if (TREE_CODE (decl
) == TEMPLATE_DECL
)
5803 decl
= DECL_TEMPLATE_RESULT (decl
);
5805 /* Attempt to merge the declarations. This can fail, in
5806 the case of some invalid specialization declarations. */
5807 pop_p
= push_scope (ctype
);
5808 ok
= duplicate_decls (decl
, old_decl
);
5813 error ("no `%#D' member function declared in class `%T'",
5821 if (DECL_CONSTRUCTOR_P (decl
) && !grok_ctor_properties (ctype
, decl
))
5824 if (ctype
== NULL_TREE
|| check
)
5828 DECL_VIRTUAL_P (decl
) = 1;
5833 /* DECL is a VAR_DECL for a static data member. Set flags to reflect
5834 the linkage that DECL will receive in the object file. */
5837 set_linkage_for_static_data_member (tree decl
)
5839 /* A static data member always has static storage duration and
5840 external linkage. Note that static data members are forbidden in
5841 local classes -- the only situation in which a class has
5842 non-external linkage. */
5843 TREE_PUBLIC (decl
) = 1;
5844 TREE_STATIC (decl
) = 1;
5845 /* For non-template classes, static data members are always put
5846 out in exactly those files where they are defined, just as
5847 with ordinary namespace-scope variables. */
5848 if (!processing_template_decl
)
5849 DECL_INTERFACE_KNOWN (decl
) = 1;
5852 /* Create a VAR_DECL named NAME with the indicated TYPE.
5854 If SCOPE is non-NULL, it is the class type or namespace containing
5855 the variable. If SCOPE is NULL, the variable should is created in
5856 the innermost enclosings scope. */
5859 grokvardecl (tree type
,
5861 const cp_decl_specifier_seq
*declspecs
,
5868 gcc_assert (!name
|| TREE_CODE (name
) == IDENTIFIER_NODE
);
5870 /* Compute the scope in which to place the variable. */
5873 /* An explicit "extern" specifier indicates a namespace-scope
5875 if (declspecs
->storage_class
== sc_extern
)
5876 scope
= current_namespace
;
5877 else if (!at_function_scope_p ())
5879 scope
= current_scope ();
5881 scope
= current_namespace
;
5886 && (/* If the variable is a namespace-scope variable declared in a
5887 template, we need DECL_LANG_SPECIFIC. */
5888 (TREE_CODE (scope
) == NAMESPACE_DECL
&& processing_template_decl
)
5889 /* Similarly for namespace-scope variables with language linkage
5891 || (TREE_CODE (scope
) == NAMESPACE_DECL
5892 && current_lang_name
!= lang_name_cplusplus
)
5893 /* Similarly for static data members. */
5895 decl
= build_lang_decl (VAR_DECL
, name
, type
);
5897 decl
= build_decl (VAR_DECL
, name
, type
);
5899 if (scope
&& TREE_CODE (scope
) == NAMESPACE_DECL
)
5900 set_decl_namespace (decl
, scope
, 0);
5902 DECL_CONTEXT (decl
) = scope
;
5904 if (declspecs
->storage_class
== sc_extern
)
5906 DECL_THIS_EXTERN (decl
) = 1;
5907 DECL_EXTERNAL (decl
) = !initialized
;
5910 if (DECL_CLASS_SCOPE_P (decl
))
5912 set_linkage_for_static_data_member (decl
);
5913 /* This function is only called with out-of-class definitions. */
5914 DECL_EXTERNAL (decl
) = 0;
5916 /* At top level, either `static' or no s.c. makes a definition
5917 (perhaps tentative), and absence of `static' makes it public. */
5918 else if (toplevel_bindings_p ())
5920 TREE_PUBLIC (decl
) = (declspecs
->storage_class
!= sc_static
5921 && (DECL_THIS_EXTERN (decl
) || ! constp
));
5922 TREE_STATIC (decl
) = ! DECL_EXTERNAL (decl
);
5924 /* Not at top level, only `static' makes a static definition. */
5927 TREE_STATIC (decl
) = declspecs
->storage_class
== sc_static
;
5928 TREE_PUBLIC (decl
) = DECL_EXTERNAL (decl
);
5931 if (declspecs
->specs
[(int)ds_thread
])
5933 if (targetm
.have_tls
)
5934 DECL_THREAD_LOCAL (decl
) = 1;
5936 /* A mere warning is sure to result in improper semantics
5937 at runtime. Don't bother to allow this to compile. */
5938 error ("thread-local storage not supported for this target");
5941 if (TREE_PUBLIC (decl
))
5943 /* [basic.link]: A name with no linkage (notably, the name of a class
5944 or enumeration declared in a local scope) shall not be used to
5945 declare an entity with linkage.
5947 Only check this for public decls for now. */
5948 tree t1
= TREE_TYPE (decl
);
5949 tree t
= no_linkage_check (t1
, /*relaxed_p=*/false);
5952 if (TYPE_ANONYMOUS_P (t
))
5954 if (DECL_EXTERN_C_P (decl
))
5955 /* Allow this; it's pretty common in C. */
5957 else if (same_type_ignoring_top_level_qualifiers_p(t1
, t
))
5958 /* This is something like "enum { a = 3 } x;", which is
5959 well formed. The enum doesn't have "a name with no
5960 linkage", because it has no name. See closed CWG issue
5963 Note that while this construct is well formed in C++03
5964 it is likely to become ill formed in C++0x. See open
5965 CWG issue 389 and related issues. */
5969 /* It's a typedef referring to an anonymous type. */
5970 pedwarn ("non-local variable `%#D' uses anonymous type",
5972 if (DECL_ORIGINAL_TYPE (TYPE_NAME (t
)))
5974 `%#D' does not refer to the unqualified type, so it is not used for linkage",
5979 pedwarn ("non-local variable `%#D' uses local type `%T'",
5987 /* Create and return a canonical pointer to member function type, for
5988 TYPE, which is a POINTER_TYPE to a METHOD_TYPE. */
5991 build_ptrmemfunc_type (tree type
)
5995 tree unqualified_variant
= NULL_TREE
;
5997 if (type
== error_mark_node
)
6000 /* If a canonical type already exists for this type, use it. We use
6001 this method instead of type_hash_canon, because it only does a
6002 simple equality check on the list of field members. */
6004 if ((t
= TYPE_GET_PTRMEMFUNC_TYPE (type
)))
6007 /* Make sure that we always have the unqualified pointer-to-member
6009 if (cp_type_quals (type
) != TYPE_UNQUALIFIED
)
6011 = build_ptrmemfunc_type (TYPE_MAIN_VARIANT (type
));
6013 t
= make_aggr_type (RECORD_TYPE
);
6014 xref_basetypes (t
, NULL_TREE
);
6016 /* Let the front-end know this is a pointer to member function... */
6017 TYPE_PTRMEMFUNC_FLAG (t
) = 1;
6018 /* ... and not really an aggregate. */
6019 SET_IS_AGGR_TYPE (t
, 0);
6021 field
= build_decl (FIELD_DECL
, pfn_identifier
, type
);
6024 field
= build_decl (FIELD_DECL
, delta_identifier
, delta_type_node
);
6025 TREE_CHAIN (field
) = fields
;
6028 finish_builtin_struct (t
, "__ptrmemfunc_type", fields
, ptr_type_node
);
6030 /* Zap out the name so that the back-end will give us the debugging
6031 information for this anonymous RECORD_TYPE. */
6032 TYPE_NAME (t
) = NULL_TREE
;
6034 /* If this is not the unqualified form of this pointer-to-member
6035 type, set the TYPE_MAIN_VARIANT for this type to be the
6036 unqualified type. Since they are actually RECORD_TYPEs that are
6037 not variants of each other, we must do this manually. */
6038 if (cp_type_quals (type
) != TYPE_UNQUALIFIED
)
6040 t
= build_qualified_type (t
, cp_type_quals (type
));
6041 TYPE_MAIN_VARIANT (t
) = unqualified_variant
;
6042 TYPE_NEXT_VARIANT (t
) = TYPE_NEXT_VARIANT (unqualified_variant
);
6043 TYPE_NEXT_VARIANT (unqualified_variant
) = t
;
6046 /* Cache this pointer-to-member type so that we can find it again
6048 TYPE_SET_PTRMEMFUNC_TYPE (type
, t
);
6053 /* Create and return a pointer to data member type. */
6056 build_ptrmem_type (tree class_type
, tree member_type
)
6058 if (TREE_CODE (member_type
) == METHOD_TYPE
)
6062 arg_types
= TYPE_ARG_TYPES (member_type
);
6063 class_type
= (cp_build_qualified_type
6065 cp_type_quals (TREE_TYPE (TREE_VALUE (arg_types
)))));
6067 = build_method_type_directly (class_type
,
6068 TREE_TYPE (member_type
),
6069 TREE_CHAIN (arg_types
));
6070 return build_ptrmemfunc_type (build_pointer_type (member_type
));
6074 gcc_assert (TREE_CODE (member_type
) != FUNCTION_TYPE
);
6075 return build_offset_type (class_type
, member_type
);
6079 /* DECL is a VAR_DECL defined in-class, whose TYPE is also given.
6080 Check to see that the definition is valid. Issue appropriate error
6081 messages. Return 1 if the definition is particularly bad, or 0
6085 check_static_variable_definition (tree decl
, tree type
)
6087 /* Motion 10 at San Diego: If a static const integral data member is
6088 initialized with an integral constant expression, the initializer
6089 may appear either in the declaration (within the class), or in
6090 the definition, but not both. If it appears in the class, the
6091 member is a member constant. The file-scope definition is always
6093 if (!ARITHMETIC_TYPE_P (type
) && TREE_CODE (type
) != ENUMERAL_TYPE
)
6095 error ("invalid in-class initialization of static data member of non-integral type `%T'",
6097 /* If we just return the declaration, crashes will sometimes
6098 occur. We therefore return void_type_node, as if this were a
6099 friend declaration, to cause callers to completely ignore
6100 this declaration. */
6103 else if (!CP_TYPE_CONST_P (type
))
6104 error ("ISO C++ forbids in-class initialization of non-const static member `%D'",
6106 else if (pedantic
&& !INTEGRAL_TYPE_P (type
))
6107 pedwarn ("ISO C++ forbids initialization of member constant `%D' of non-integral type `%T'", decl
, type
);
6112 /* Given the SIZE (i.e., number of elements) in an array, compute an
6113 appropriate index type for the array. If non-NULL, NAME is the
6114 name of the thing being declared. */
6117 compute_array_index_type (tree name
, tree size
)
6119 tree type
= TREE_TYPE (size
);
6122 /* The array bound must be an integer type. */
6123 if (!dependent_type_p (type
) && !INTEGRAL_TYPE_P (type
))
6126 error ("size of array `%D' has non-integral type `%T'", name
, type
);
6128 error ("size of array has non-integral type `%T'", type
);
6129 size
= integer_one_node
;
6130 type
= TREE_TYPE (size
);
6133 if (abi_version_at_least (2)
6134 /* We should only handle value dependent expressions specially. */
6135 ? value_dependent_expression_p (size
)
6136 /* But for abi-1, we handled all instances in templates. This
6137 effects the manglings produced. */
6138 : processing_template_decl
)
6139 return build_index_type (build_min (MINUS_EXPR
, sizetype
,
6140 size
, integer_one_node
));
6142 /* The size might be the result of a cast. */
6143 STRIP_TYPE_NOPS (size
);
6145 /* It might be a const variable or enumeration constant. */
6146 size
= decl_constant_value (size
);
6148 /* Normally, the array-bound will be a constant. */
6149 if (TREE_CODE (size
) == INTEGER_CST
)
6151 /* Check to see if the array bound overflowed. Make that an
6152 error, no matter how generous we're being. */
6153 int old_flag_pedantic_errors
= flag_pedantic_errors
;
6154 int old_pedantic
= pedantic
;
6155 pedantic
= flag_pedantic_errors
= 1;
6156 constant_expression_warning (size
);
6157 pedantic
= old_pedantic
;
6158 flag_pedantic_errors
= old_flag_pedantic_errors
;
6160 /* An array must have a positive number of elements. */
6161 if (INT_CST_LT (size
, integer_zero_node
))
6164 error ("size of array `%D' is negative", name
);
6166 error ("size of array is negative");
6167 size
= integer_one_node
;
6169 /* As an extension we allow zero-sized arrays. We always allow
6170 them in system headers because glibc uses them. */
6171 else if (integer_zerop (size
) && pedantic
&& !in_system_header
)
6174 pedwarn ("ISO C++ forbids zero-size array `%D'", name
);
6176 pedwarn ("ISO C++ forbids zero-size array");
6179 else if (TREE_CONSTANT (size
))
6181 /* `(int) &fn' is not a valid array bound. */
6183 error ("size of array `%D' is not an integral constant-expression",
6186 error ("size of array is not an integral constant-expression");
6191 pedwarn ("ISO C++ forbids variable-size array `%D'", name
);
6193 pedwarn ("ISO C++ forbids variable-size array");
6196 if (processing_template_decl
&& !TREE_CONSTANT (size
))
6197 /* A variable sized array. */
6198 itype
= build_min (MINUS_EXPR
, sizetype
, size
, integer_one_node
);
6201 HOST_WIDE_INT saved_processing_template_decl
;
6203 /* Compute the index of the largest element in the array. It is
6204 one less than the number of elements in the array. We save
6205 and restore PROCESSING_TEMPLATE_DECL so that computations in
6206 cp_build_binary_op will be appropriately folded. */
6207 saved_processing_template_decl
= processing_template_decl
;
6208 processing_template_decl
= 0;
6209 itype
= cp_build_binary_op (MINUS_EXPR
,
6210 cp_convert (ssizetype
, size
),
6211 cp_convert (ssizetype
, integer_one_node
));
6212 itype
= fold (itype
);
6213 processing_template_decl
= saved_processing_template_decl
;
6215 if (!TREE_CONSTANT (itype
))
6216 /* A variable sized array. */
6217 itype
= variable_size (itype
);
6218 /* Make sure that there was no overflow when creating to a signed
6219 index type. (For example, on a 32-bit machine, an array with
6220 size 2^32 - 1 is too big.) */
6221 else if (TREE_OVERFLOW (itype
))
6223 error ("overflow in array dimension");
6224 TREE_OVERFLOW (itype
) = 0;
6228 /* Create and return the appropriate index type. */
6229 return build_index_type (itype
);
6232 /* Returns the scope (if any) in which the entity declared by
6233 DECLARATOR will be located. If the entity was declared with an
6234 unqualified name, NULL_TREE is returned. */
6237 get_scope_of_declarator (const cp_declarator
*declarator
)
6239 while (declarator
&& declarator
->kind
!= cdk_id
)
6240 declarator
= declarator
->declarator
;
6242 /* If the declarator-id is a SCOPE_REF, the scope in which the
6243 declaration occurs is the first operand. */
6245 && declarator
->u
.id
.name
6246 && TREE_CODE (declarator
->u
.id
.name
) == SCOPE_REF
)
6247 return TREE_OPERAND (declarator
->u
.id
.name
, 0);
6249 /* Otherwise, the declarator is not a qualified name; the entity will
6250 be declared in the current scope. */
6254 /* Returns an ARRAY_TYPE for an array with SIZE elements of the
6255 indicated TYPE. If non-NULL, NAME is the NAME of the declaration
6259 create_array_type_for_decl (tree name
, tree type
, tree size
)
6261 tree itype
= NULL_TREE
;
6262 const char* error_msg
;
6264 /* If things have already gone awry, bail now. */
6265 if (type
== error_mark_node
|| size
== error_mark_node
)
6266 return error_mark_node
;
6268 /* Assume that everything will go OK. */
6271 /* There are some types which cannot be array elements. */
6272 switch (TREE_CODE (type
))
6275 error_msg
= "array of void";
6279 error_msg
= "array of functions";
6282 case REFERENCE_TYPE
:
6283 error_msg
= "array of references";
6287 error_msg
= "array of function members";
6294 /* If something went wrong, issue an error-message and return. */
6298 error ("declaration of `%D' as %s", name
, error_msg
);
6300 error ("creating %s", error_msg
);
6302 return error_mark_node
;
6307 The constant expressions that specify the bounds of the arrays
6308 can be omitted only for the first member of the sequence. */
6309 if (TREE_CODE (type
) == ARRAY_TYPE
&& !TYPE_DOMAIN (type
))
6312 error ("declaration of `%D' as multidimensional array must have bounds for all dimensions except the first",
6315 error ("multidimensional array must have bounds for all dimensions except the first");
6317 return error_mark_node
;
6320 /* Figure out the index type for the array. */
6322 itype
= compute_array_index_type (name
, size
);
6325 T is called the array element type; this type shall not be [...] an
6326 abstract class type. */
6327 abstract_virtuals_error (name
, type
);
6329 return build_cplus_array_type (type
, itype
);
6332 /* Check that it's OK to declare a function with the indicated TYPE.
6333 SFK indicates the kind of special function (if any) that this
6334 function is. OPTYPE is the type given in a conversion operator
6335 declaration, or the class type for a constructor/destructor.
6336 Returns the actual return type of the function; that
6337 may be different than TYPE if an error occurs, or for certain
6338 special functions. */
6341 check_special_function_return_type (special_function_kind sfk
,
6347 case sfk_constructor
:
6349 error ("return type specification for constructor invalid");
6351 if (targetm
.cxx
.cdtor_returns_this () && !TYPE_FOR_JAVA (optype
))
6352 type
= build_pointer_type (optype
);
6354 type
= void_type_node
;
6357 case sfk_destructor
:
6359 error ("return type specification for destructor invalid");
6360 /* We can't use the proper return type here because we run into
6361 problems with ambiguous bases and covariant returns.
6362 Java classes are left unchanged because (void *) isn't a valid
6363 Java type, and we don't want to change the Java ABI. */
6364 if (targetm
.cxx
.cdtor_returns_this () && !TYPE_FOR_JAVA (optype
))
6365 type
= build_pointer_type (void_type_node
);
6367 type
= void_type_node
;
6370 case sfk_conversion
:
6371 if (type
&& !same_type_p (type
, optype
))
6372 error ("operator `%T' declared to return `%T'", optype
, type
);
6374 pedwarn ("return type specified for `operator %T'", optype
);
6385 /* Given declspecs and a declarator (abstract or otherwise), determine
6386 the name and type of the object declared and construct a DECL node
6389 DECLSPECS is a chain of tree_list nodes whose value fields
6390 are the storage classes and type specifiers.
6392 DECL_CONTEXT says which syntactic context this declaration is in:
6393 NORMAL for most contexts. Make a VAR_DECL or FUNCTION_DECL or TYPE_DECL.
6394 FUNCDEF for a function definition. Like NORMAL but a few different
6395 error messages in each case. Return value may be zero meaning
6396 this definition is too screwy to try to parse.
6397 MEMFUNCDEF for a function definition. Like FUNCDEF but prepares to
6398 handle member functions (which have FIELD context).
6399 Return value may be zero meaning this definition is too screwy to
6401 PARM for a parameter declaration (either within a function prototype
6402 or before a function body). Make a PARM_DECL, or return void_type_node.
6403 CATCHPARM for a parameter declaration before a catch clause.
6404 TYPENAME if for a typename (in a cast or sizeof).
6405 Don't make a DECL node; just return the ..._TYPE node.
6406 FIELD for a struct or union field; make a FIELD_DECL.
6407 BITFIELD for a field with specified width.
6408 INITIALIZED is 1 if the decl has an initializer.
6410 ATTRLIST is a pointer to the list of attributes, which may be NULL
6411 if there are none; *ATTRLIST may be modified if attributes from inside
6412 the declarator should be applied to the declaration.
6414 When this function is called, scoping variables (such as
6415 CURRENT_CLASS_TYPE) should reflect the scope in which the
6416 declaration occurs, not the scope in which the new declaration will
6417 be placed. For example, on:
6421 when grokdeclarator is called for `S::f', the CURRENT_CLASS_TYPE
6422 should not be `S'. */
6425 grokdeclarator (const cp_declarator
*declarator
,
6426 const cp_decl_specifier_seq
*declspecs
,
6427 enum decl_context decl_context
,
6431 tree type
= NULL_TREE
;
6434 int virtualp
, explicitp
, friendp
, inlinep
, staticp
;
6435 int explicit_int
= 0;
6436 int explicit_char
= 0;
6437 int defaulted_int
= 0;
6438 tree dependant_name
= NULL_TREE
;
6440 tree typedef_decl
= NULL_TREE
;
6441 const char *name
= NULL
;
6442 tree typedef_type
= NULL_TREE
;
6443 int funcdef_flag
= 0;
6444 cp_declarator_kind innermost_code
= cdk_error
;
6447 /* See the code below that used this. */
6448 tree decl_attr
= NULL_TREE
;
6451 /* Keep track of what sort of function is being processed
6452 so that we can warn about default return values, or explicit
6453 return values which do not match prescribed defaults. */
6454 special_function_kind sfk
= sfk_none
;
6456 tree dname
= NULL_TREE
;
6457 tree ctor_return_type
= NULL_TREE
;
6458 enum overload_flags flags
= NO_SPECIAL
;
6459 cp_cv_quals quals
= TYPE_UNQUALIFIED
;
6460 tree raises
= NULL_TREE
;
6461 int template_count
= 0;
6462 tree returned_attrs
= NULL_TREE
;
6463 tree parms
= NULL_TREE
;
6464 const cp_declarator
*id_declarator
;
6465 /* The unqualified name of the declarator; either an
6466 IDENTIFIER_NODE, BIT_NOT_EXPR, or TEMPLATE_ID_EXPR. */
6467 tree unqualified_id
;
6468 /* The class type, if any, in which this entity is located,
6469 or NULL_TREE if none. Note that this value may be different from
6470 the current class type; for example if an attempt is made to declare
6471 "A::f" inside "B", this value will be "A". */
6472 tree ctype
= current_class_type
;
6473 /* The NAMESPACE_DECL for the namespace in which this entity is
6474 located. If an unqualified name is used to declare the entity,
6475 this value will be NULL_TREE, even if the entity is located at
6477 tree in_namespace
= NULL_TREE
;
6479 cp_storage_class storage_class
;
6480 bool unsigned_p
, signed_p
, short_p
, long_p
, thread_p
;
6481 bool type_was_error_mark_node
= false;
6483 signed_p
= declspecs
->specs
[(int)ds_signed
];
6484 unsigned_p
= declspecs
->specs
[(int)ds_unsigned
];
6485 short_p
= declspecs
->specs
[(int)ds_short
];
6486 long_p
= declspecs
->specs
[(int)ds_long
];
6487 thread_p
= declspecs
->specs
[(int)ds_thread
];
6489 if (decl_context
== FUNCDEF
)
6490 funcdef_flag
= 1, decl_context
= NORMAL
;
6491 else if (decl_context
== MEMFUNCDEF
)
6492 funcdef_flag
= -1, decl_context
= FIELD
;
6493 else if (decl_context
== BITFIELD
)
6494 bitfield
= 1, decl_context
= FIELD
;
6496 /* Look inside a declarator for the name being declared
6497 and get it as a string, for an error message. */
6498 for (id_declarator
= declarator
;
6500 id_declarator
= id_declarator
->declarator
)
6502 if (id_declarator
->kind
!= cdk_id
)
6503 innermost_code
= id_declarator
->kind
;
6505 switch (id_declarator
->kind
)
6508 if (id_declarator
->declarator
6509 && id_declarator
->declarator
->kind
== cdk_id
)
6511 sfk
= id_declarator
->declarator
->u
.id
.sfk
;
6512 if (sfk
== sfk_destructor
)
6519 tree decl
= id_declarator
->u
.id
.name
;
6522 if (TREE_CODE (decl
) == SCOPE_REF
)
6524 tree qualifying_scope
= TREE_OPERAND (decl
, 0);
6526 /* It is valid to write:
6528 class C { void f(); };
6532 The standard is not clear about whether `typedef const C D' is
6533 legal; as of 2002-09-15 the committee is considering
6534 that question. EDG 3.0 allows that syntax.
6535 Therefore, we do as well. */
6536 if (qualifying_scope
&& TYPE_P (qualifying_scope
))
6538 ctype
= TYPE_MAIN_VARIANT (qualifying_scope
);
6539 if (innermost_code
!= cdk_function
6540 && current_class_type
6541 && !UNIQUELY_DERIVED_FROM_P (ctype
,
6542 current_class_type
))
6544 error ("type `%T' is not derived from type `%T'",
6545 ctype
, current_class_type
);
6548 TREE_OPERAND (decl
, 0) = ctype
;
6550 else if (TREE_CODE (qualifying_scope
) == NAMESPACE_DECL
)
6551 in_namespace
= qualifying_scope
;
6552 decl
= TREE_OPERAND (decl
, 1);
6554 if (TREE_CODE (decl
) == BASELINK
)
6555 decl
= BASELINK_FUNCTIONS (decl
);
6556 if (decl
== error_mark_node
)
6557 return error_mark_node
;
6558 switch (TREE_CODE (decl
))
6562 tree type
= TREE_OPERAND (decl
, 0);
6563 type
= constructor_name (type
);
6564 name
= IDENTIFIER_POINTER (type
);
6568 case TEMPLATE_ID_EXPR
:
6570 tree fns
= TREE_OPERAND (decl
, 0);
6573 if (TREE_CODE (dname
) == COMPONENT_REF
)
6574 dname
= TREE_OPERAND (dname
, 1);
6575 if (TREE_CODE (dname
) != IDENTIFIER_NODE
)
6577 gcc_assert (is_overloaded_fn (dname
));
6578 dname
= DECL_NAME (get_first_fn (dname
));
6583 case IDENTIFIER_NODE
:
6584 if (TREE_CODE (decl
) == IDENTIFIER_NODE
)
6587 if (C_IS_RESERVED_WORD (dname
))
6589 error ("declarator-id missing; using reserved word `%D'",
6591 name
= IDENTIFIER_POINTER (dname
);
6593 else if (!IDENTIFIER_TYPENAME_P (dname
))
6594 name
= IDENTIFIER_POINTER (dname
);
6597 gcc_assert (flags
== NO_SPECIAL
);
6598 flags
= TYPENAME_FLAG
;
6599 ctor_return_type
= TREE_TYPE (dname
);
6600 sfk
= sfk_conversion
;
6601 if (is_typename_at_global_scope (dname
))
6602 name
= IDENTIFIER_POINTER (dname
);
6604 name
= "<invalid operator>";
6609 dname
= constructor_name (TREE_TYPE (decl
));
6610 name
= IDENTIFIER_POINTER (dname
);
6631 if (id_declarator
->kind
== cdk_id
)
6635 /* A function definition's declarator must have the form of
6636 a function declarator. */
6638 if (funcdef_flag
&& innermost_code
!= cdk_function
)
6641 if (((dname
&& IDENTIFIER_OPNAME_P (dname
)) || flags
== TYPENAME_FLAG
)
6642 && innermost_code
!= cdk_function
6643 && ! (ctype
&& !declspecs
->any_specifiers_p
))
6645 error ("declaration of `%D' as non-function", dname
);
6646 return void_type_node
;
6649 /* Anything declared one level down from the top level
6650 must be one of the parameters of a function
6651 (because the body is at least two levels down). */
6653 /* This heuristic cannot be applied to C++ nodes! Fixed, however,
6654 by not allowing C++ class definitions to specify their parameters
6655 with xdecls (must be spec.d in the parmlist).
6657 Since we now wait to push a class scope until we are sure that
6658 we are in a legitimate method context, we must set oldcname
6659 explicitly (since current_class_name is not yet alive).
6661 We also want to avoid calling this a PARM if it is in a namespace. */
6663 if (decl_context
== NORMAL
&& !toplevel_bindings_p ())
6665 struct cp_binding_level
*b
= current_binding_level
;
6666 current_binding_level
= b
->level_chain
;
6667 if (current_binding_level
!= 0 && toplevel_bindings_p ())
6668 decl_context
= PARM
;
6669 current_binding_level
= b
;
6673 name
= decl_context
== PARM
? "parameter" : "type name";
6675 /* If there were multiple types specified in the decl-specifier-seq,
6676 issue an error message. */
6677 if (declspecs
->multiple_types_p
)
6678 error ("two or more data types in declaration of `%s'", name
);
6679 /* Extract the basic type from the decl-specifier-seq. */
6680 type
= declspecs
->type
;
6681 if (type
== error_mark_node
)
6684 type_was_error_mark_node
= true;
6686 /* If the entire declaration is itself tagged as deprecated then
6687 suppress reports of deprecated items. */
6688 if (type
&& TREE_DEPRECATED (type
)
6689 && deprecated_state
!= DEPRECATED_SUPPRESS
)
6690 warn_deprecated_use (type
);
6691 if (type
&& TREE_CODE (type
) == TYPE_DECL
)
6693 typedef_decl
= type
;
6694 type
= TREE_TYPE (typedef_decl
);
6696 /* No type at all: default to `int', and set DEFAULTED_INT
6697 because it was not a user-defined typedef. */
6698 if (type
== NULL_TREE
&& (signed_p
|| unsigned_p
|| long_p
|| short_p
))
6700 /* These imply 'int'. */
6701 type
= integer_type_node
;
6705 explicit_int
= declspecs
->explicit_int_p
;
6706 explicit_char
= declspecs
->explicit_char_p
;
6708 /* Check for repeated decl-specifiers. */
6709 for (ds
= ds_first
; ds
!= ds_last
; ++ds
)
6711 unsigned count
= declspecs
->specs
[(int)ds
];
6714 /* The "long" specifier is a special case because of
6719 error ("`long long long' is too long for GCC");
6720 else if (pedantic
&& !in_system_header
&& warn_long_long
)
6721 pedwarn ("ISO C++ does not support `long long'");
6725 else if (declspecs
->specs
[(int)ds
] > 1)
6727 static const char *const decl_spec_names
[] = {
6743 error ("duplicate `%s'", decl_spec_names
[(int)ds
]);
6748 /* See the code below that used this. */
6750 decl_attr
= DECL_ATTRIBUTES (typedef_decl
);
6752 typedef_type
= type
;
6755 if (sfk
!= sfk_conversion
)
6756 ctor_return_type
= ctype
;
6758 if (sfk
!= sfk_none
)
6759 type
= check_special_function_return_type (sfk
, type
,
6761 else if (type
== NULL_TREE
)
6767 /* We handle `main' specially here, because 'main () { }' is so
6768 common. With no options, it is allowed. With -Wreturn-type,
6769 it is a warning. It is only an error with -pedantic-errors. */
6770 is_main
= (funcdef_flag
6771 && dname
&& MAIN_NAME_P (dname
)
6772 && ctype
== NULL_TREE
6773 && in_namespace
== NULL_TREE
6774 && current_namespace
== global_namespace
);
6776 if (type_was_error_mark_node
)
6777 /* We've already issued an error, don't complain more. */;
6778 else if (in_system_header
|| flag_ms_extensions
)
6779 /* Allow it, sigh. */;
6780 else if (pedantic
|| ! is_main
)
6781 pedwarn ("ISO C++ forbids declaration of `%s' with no type",
6783 else if (warn_return_type
)
6784 warning ("ISO C++ forbids declaration of `%s' with no type",
6787 type
= integer_type_node
;
6792 /* Now process the modifiers that were specified
6793 and check for invalid combinations. */
6795 /* Long double is a special combination. */
6796 if (long_p
&& TYPE_MAIN_VARIANT (type
) == double_type_node
)
6799 type
= build_qualified_type (long_double_type_node
,
6800 cp_type_quals (type
));
6803 /* Check all other uses of type modifiers. */
6805 if (unsigned_p
|| signed_p
|| long_p
|| short_p
)
6809 if (TREE_CODE (type
) == REAL_TYPE
)
6810 error ("short, signed or unsigned invalid for `%s'", name
);
6811 else if (TREE_CODE (type
) != INTEGER_TYPE
)
6812 error ("long, short, signed or unsigned invalid for `%s'", name
);
6813 else if (long_p
&& short_p
)
6814 error ("long and short specified together for `%s'", name
);
6815 else if ((long_p
|| short_p
) && explicit_char
)
6816 error ("long or short specified with char for `%s'", name
);
6817 else if ((long_p
|| short_p
) && TREE_CODE (type
) == REAL_TYPE
)
6818 error ("long or short specified with floating type for `%s'", name
);
6819 else if (signed_p
&& unsigned_p
)
6820 error ("signed and unsigned given together for `%s'", name
);
6824 if (!explicit_int
&& !defaulted_int
&& !explicit_char
&& pedantic
)
6826 pedwarn ("long, short, signed or unsigned used invalidly for `%s'",
6828 if (flag_pedantic_errors
)
6833 /* Discard the type modifiers if they are invalid. */
6844 /* Decide whether an integer type is signed or not.
6845 Optionally treat bitfields as signed by default. */
6849 It is implementation-defined whether a plain (neither
6850 explicitly signed or unsigned) char, short, int, or long
6851 bit-field is signed or unsigned.
6853 Naturally, we extend this to long long as well. Note that
6854 this does not include wchar_t. */
6855 || (bitfield
&& !flag_signed_bitfields
6857 /* A typedef for plain `int' without `signed' can be
6858 controlled just like plain `int', but a typedef for
6859 `signed int' cannot be so controlled. */
6861 && C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl
))
6862 && (TREE_CODE (type
) == INTEGER_TYPE
6863 || TREE_CODE (type
) == CHAR_TYPE
)
6864 && !same_type_p (TYPE_MAIN_VARIANT (type
), wchar_type_node
)))
6867 type
= long_long_unsigned_type_node
;
6869 type
= long_unsigned_type_node
;
6871 type
= short_unsigned_type_node
;
6872 else if (type
== char_type_node
)
6873 type
= unsigned_char_type_node
;
6874 else if (typedef_decl
)
6875 type
= c_common_unsigned_type (type
);
6877 type
= unsigned_type_node
;
6879 else if (signed_p
&& type
== char_type_node
)
6880 type
= signed_char_type_node
;
6882 type
= long_long_integer_type_node
;
6884 type
= long_integer_type_node
;
6886 type
= short_integer_type_node
;
6888 if (declspecs
->specs
[(int)ds_complex
])
6890 if (TREE_CODE (type
) != INTEGER_TYPE
&& TREE_CODE (type
) != REAL_TYPE
)
6891 error ("complex invalid for `%s'", name
);
6892 /* If we just have "complex", it is equivalent to
6893 "complex double", but if any modifiers at all are specified it is
6894 the complex form of TYPE. E.g, "complex short" is
6895 "complex short int". */
6897 else if (defaulted_int
&& ! longlong
6898 && ! (long_p
|| short_p
|| signed_p
|| unsigned_p
))
6899 type
= complex_double_type_node
;
6900 else if (type
== integer_type_node
)
6901 type
= complex_integer_type_node
;
6902 else if (type
== float_type_node
)
6903 type
= complex_float_type_node
;
6904 else if (type
== double_type_node
)
6905 type
= complex_double_type_node
;
6906 else if (type
== long_double_type_node
)
6907 type
= complex_long_double_type_node
;
6909 type
= build_complex_type (type
);
6912 type_quals
= TYPE_UNQUALIFIED
;
6913 if (declspecs
->specs
[(int)ds_const
])
6914 type_quals
|= TYPE_QUAL_CONST
;
6915 if (declspecs
->specs
[(int)ds_volatile
])
6916 type_quals
|= TYPE_QUAL_VOLATILE
;
6917 if (declspecs
->specs
[(int)ds_restrict
])
6918 type_quals
|= TYPE_QUAL_RESTRICT
;
6919 if (sfk
== sfk_conversion
&& type_quals
!= TYPE_UNQUALIFIED
)
6920 error ("qualifiers are not allowed on declaration of `operator %T'",
6923 type_quals
|= cp_type_quals (type
);
6924 type
= cp_build_qualified_type_real
6925 (type
, type_quals
, ((typedef_decl
&& !DECL_ARTIFICIAL (typedef_decl
)
6926 ? tf_ignore_bad_quals
: 0) | tf_error
| tf_warning
));
6927 /* We might have ignored or rejected some of the qualifiers. */
6928 type_quals
= cp_type_quals (type
);
6931 inlinep
= !! declspecs
->specs
[(int)ds_inline
];
6932 virtualp
= !! declspecs
->specs
[(int)ds_virtual
];
6933 explicitp
= !! declspecs
->specs
[(int)ds_explicit
];
6935 storage_class
= declspecs
->storage_class
;
6936 if (storage_class
== sc_static
)
6937 staticp
= 1 + (decl_context
== FIELD
);
6939 if (virtualp
&& staticp
== 2)
6941 error ("member `%D' cannot be declared both virtual and static",
6945 friendp
= !! declspecs
->specs
[(int)ds_friend
];
6947 if (dependant_name
&& !friendp
)
6949 error ("`%T::%D' is not a valid declarator", ctype
, dependant_name
);
6950 return void_type_node
;
6953 /* Issue errors about use of storage classes for parameters. */
6954 if (decl_context
== PARM
)
6956 if (declspecs
->specs
[(int)ds_typedef
])
6957 error ("typedef declaration invalid in parameter declaration");
6958 else if (storage_class
== sc_static
6959 || storage_class
== sc_extern
6961 error ("storage class specifiers invalid in parameter declarations");
6964 /* Give error if `virtual' is used outside of class declaration. */
6966 && (current_class_name
== NULL_TREE
|| decl_context
!= FIELD
))
6968 error ("virtual outside class declaration");
6972 /* Static anonymous unions are dealt with here. */
6973 if (staticp
&& decl_context
== TYPENAME
6975 && ANON_AGGR_TYPE_P (declspecs
->type
))
6976 decl_context
= FIELD
;
6978 /* Warn about storage classes that are invalid for certain
6979 kinds of declarations (parameters, typenames, etc.). */
6980 if (declspecs
->multiple_storage_classes_p
)
6981 error ("multiple storage classes in declaration of `%s'", name
);
6984 && storage_class
!= sc_extern
6985 && storage_class
!= sc_static
)
6986 || declspecs
->specs
[(int)ds_typedef
]))
6988 error ("multiple storage classes in declaration of `%s'", name
);
6991 else if (decl_context
!= NORMAL
6992 && ((storage_class
!= sc_none
6993 && storage_class
!= sc_mutable
)
6996 if ((decl_context
== PARM
|| decl_context
== CATCHPARM
)
6997 && (storage_class
== sc_register
6998 || storage_class
== sc_auto
))
7000 else if (declspecs
->specs
[(int)ds_typedef
])
7002 else if (decl_context
== FIELD
7003 /* C++ allows static class elements. */
7004 && storage_class
== sc_static
)
7005 /* C++ also allows inlines and signed and unsigned elements,
7006 but in those cases we don't come in here. */
7010 if (decl_context
== FIELD
)
7012 tree tmp
= NULL_TREE
;
7017 /* Avoid trying to get an operand off an identifier node. */
7018 if (declarator
->kind
!= cdk_id
)
7019 tmp
= declarator
->declarator
->u
.id
.name
;
7021 tmp
= declarator
->u
.id
.name
;
7022 op
= IDENTIFIER_OPNAME_P (tmp
);
7023 if (IDENTIFIER_TYPENAME_P (tmp
))
7025 if (is_typename_at_global_scope (tmp
))
7026 name
= IDENTIFIER_POINTER (tmp
);
7028 name
= "<invalid operator>";
7031 error ("storage class specified for %s `%s'",
7032 op
? "member operator" : "field",
7037 if (decl_context
== PARM
|| decl_context
== CATCHPARM
)
7038 error ("storage class specified for parameter `%s'", name
);
7040 error ("storage class specified for typename");
7042 if (storage_class
== sc_register
7043 || storage_class
== sc_auto
7044 || storage_class
== sc_extern
7046 storage_class
= sc_none
;
7049 else if (storage_class
== sc_extern
&& initialized
7052 if (toplevel_bindings_p ())
7054 /* It's common practice (and completely valid) to have a const
7055 be initialized and declared extern. */
7056 if (!(type_quals
& TYPE_QUAL_CONST
))
7057 warning ("`%s' initialized and declared `extern'", name
);
7060 error ("`%s' has both `extern' and initializer", name
);
7062 else if (storage_class
== sc_extern
&& funcdef_flag
7063 && ! toplevel_bindings_p ())
7064 error ("nested function `%s' declared `extern'", name
);
7065 else if (toplevel_bindings_p ())
7067 if (storage_class
== sc_auto
)
7068 error ("top-level declaration of `%s' specifies `auto'", name
);
7071 && storage_class
!= sc_extern
7072 && storage_class
!= sc_static
)
7074 error ("function-scope `%s' implicitly auto and declared `__thread'",
7079 if (storage_class
&& friendp
)
7080 error ("storage class specifiers invalid in friend function declarations");
7083 unqualified_id
= NULL_TREE
;
7086 unqualified_id
= id_declarator
->u
.id
.name
;
7087 if (TREE_CODE (unqualified_id
) == SCOPE_REF
)
7088 unqualified_id
= TREE_OPERAND (unqualified_id
, 1);
7089 if (TREE_CODE (unqualified_id
) == BASELINK
)
7090 unqualified_id
= BASELINK_FUNCTIONS (unqualified_id
);
7091 switch (TREE_CODE (unqualified_id
))
7095 = constructor_name (TREE_OPERAND (unqualified_id
, 0));
7100 = constructor_name (TREE_TYPE (unqualified_id
));
7103 case IDENTIFIER_NODE
:
7104 case TEMPLATE_ID_EXPR
:
7112 /* Determine the type of the entity declared by recurring on the
7115 declarator
&& declarator
->kind
!= cdk_id
;
7116 declarator
= declarator
->declarator
)
7118 const cp_declarator
*inner_declarator
;
7121 if (type
== error_mark_node
)
7122 return error_mark_node
;
7124 inner_declarator
= declarator
->declarator
;
7126 attrs
= declarator
->attributes
;
7132 if (declarator
== NULL
|| declarator
->kind
== cdk_id
)
7133 attr_flags
|= (int) ATTR_FLAG_DECL_NEXT
;
7134 if (declarator
->kind
== cdk_function
)
7135 attr_flags
|= (int) ATTR_FLAG_FUNCTION_NEXT
;
7136 if (declarator
->kind
== cdk_array
)
7137 attr_flags
|= (int) ATTR_FLAG_ARRAY_NEXT
;
7138 returned_attrs
= decl_attributes (&type
,
7139 chainon (returned_attrs
, attrs
),
7143 switch (declarator
->kind
)
7146 type
= create_array_type_for_decl (dname
, type
,
7147 declarator
->u
.array
.bounds
);
7148 if (inner_declarator
7149 && (inner_declarator
->kind
== cdk_pointer
7150 || inner_declarator
->kind
== cdk_reference
7151 || inner_declarator
->kind
== cdk_ptrmem
))
7152 /* We can never complete an array type which is the
7153 target of a pointer, so go ahead and lay it out. */
7162 /* Declaring a function type.
7163 Make sure we have a valid type for the function to return. */
7165 /* We now know that the TYPE_QUALS don't apply to the
7166 decl, but to its return type. */
7167 type_quals
= TYPE_UNQUALIFIED
;
7169 /* Warn about some types functions can't return. */
7171 if (TREE_CODE (type
) == FUNCTION_TYPE
)
7173 error ("`%s' declared as function returning a function", name
);
7174 type
= integer_type_node
;
7176 if (TREE_CODE (type
) == ARRAY_TYPE
)
7178 error ("`%s' declared as function returning an array", name
);
7179 type
= integer_type_node
;
7182 /* Pick up type qualifiers which should be applied to `this'. */
7183 quals
= declarator
->u
.function
.qualifiers
;
7185 /* Pick up the exception specifications. */
7186 raises
= declarator
->u
.function
.exception_specification
;
7188 /* Say it's a definition only for the CALL_EXPR
7189 closest to the identifier. */
7190 funcdecl_p
= inner_declarator
&& inner_declarator
->kind
== cdk_id
;
7192 if (ctype
== NULL_TREE
7193 && decl_context
== FIELD
7195 && (friendp
== 0 || dname
== current_class_name
))
7196 ctype
= current_class_type
;
7198 if (ctype
&& sfk
== sfk_conversion
)
7199 TYPE_HAS_CONVERSION (ctype
) = 1;
7200 if (ctype
&& (sfk
== sfk_constructor
7201 || sfk
== sfk_destructor
))
7203 /* We are within a class's scope. If our declarator name
7204 is the same as the class name, and we are defining
7205 a function, then it is a constructor/destructor, and
7206 therefore returns a void type. */
7208 if (flags
== DTOR_FLAG
)
7210 /* ISO C++ 12.4/2. A destructor may not be
7211 declared const or volatile. A destructor may
7214 error ("destructor cannot be static member function");
7217 error ("destructors may not be cv-qualified");
7218 quals
= TYPE_UNQUALIFIED
;
7220 if (decl_context
== FIELD
)
7222 if (! member_function_or_else (ctype
,
7225 return void_type_node
;
7228 else /* It's a constructor. */
7232 /* ISO C++ 12.1. A constructor may not be
7233 declared const or volatile. A constructor may
7234 not be virtual. A constructor may not be
7237 error ("constructor cannot be static member function");
7240 pedwarn ("constructors cannot be declared virtual");
7245 error ("constructors may not be cv-qualified");
7246 quals
= TYPE_UNQUALIFIED
;
7248 if (decl_context
== FIELD
)
7250 if (! member_function_or_else (ctype
,
7253 return void_type_node
;
7254 TYPE_HAS_CONSTRUCTOR (ctype
) = 1;
7255 if (sfk
!= sfk_constructor
)
7259 if (decl_context
== FIELD
)
7265 error ("can't initialize friend function `%s'", name
);
7268 /* Cannot be both friend and virtual. */
7269 error ("virtual functions cannot be friends");
7272 if (decl_context
== NORMAL
)
7273 error ("friend declaration not in class definition");
7274 if (current_function_decl
&& funcdef_flag
)
7275 error ("can't define friend function `%s' in a local class definition",
7279 arg_types
= grokparms (declarator
->u
.function
.parameters
,
7282 if (inner_declarator
7283 && inner_declarator
->kind
== cdk_id
7284 && inner_declarator
->u
.id
.sfk
== sfk_destructor
7285 && arg_types
!= void_list_node
)
7287 error ("destructors may not have parameters");
7288 arg_types
= void_list_node
;
7292 type
= build_function_type (type
, arg_types
);
7299 /* Filter out pointers-to-references and references-to-references.
7300 We can get these if a TYPE_DECL is used. */
7302 if (TREE_CODE (type
) == REFERENCE_TYPE
)
7304 error (declarator
->kind
== cdk_reference
7305 ? "cannot declare reference to `%#T'"
7306 : "cannot declare pointer to `%#T'", type
);
7307 type
= TREE_TYPE (type
);
7309 else if (VOID_TYPE_P (type
))
7311 if (declarator
->kind
== cdk_reference
)
7312 error ("cannot declare reference to `%#T'", type
);
7313 else if (declarator
->kind
== cdk_ptrmem
)
7314 error ("cannot declare pointer to `%#T' member", type
);
7317 /* We now know that the TYPE_QUALS don't apply to the decl,
7318 but to the target of the pointer. */
7319 type_quals
= TYPE_UNQUALIFIED
;
7321 if (declarator
->kind
== cdk_ptrmem
7322 && (TREE_CODE (type
) == FUNCTION_TYPE
7323 || (quals
&& TREE_CODE (type
) == METHOD_TYPE
)))
7325 tree dummy
= build_decl (TYPE_DECL
, NULL_TREE
, type
);
7326 grok_method_quals (declarator
->u
.pointer
.class_type
,
7328 type
= TREE_TYPE (dummy
);
7329 quals
= TYPE_UNQUALIFIED
;
7332 if (declarator
->kind
== cdk_reference
)
7334 if (!VOID_TYPE_P (type
))
7335 type
= build_reference_type (type
);
7337 else if (TREE_CODE (type
) == METHOD_TYPE
)
7338 type
= build_ptrmemfunc_type (build_pointer_type (type
));
7339 else if (declarator
->kind
== cdk_ptrmem
)
7340 type
= build_ptrmem_type (declarator
->u
.pointer
.class_type
,
7343 type
= build_pointer_type (type
);
7345 /* Process a list of type modifier keywords (such as
7346 const or volatile) that were given inside the `*' or `&'. */
7348 if (declarator
->u
.pointer
.qualifiers
)
7351 = cp_build_qualified_type (type
,
7352 declarator
->u
.pointer
.qualifiers
);
7353 type_quals
= cp_type_quals (type
);
7366 if (unqualified_id
&& TREE_CODE (unqualified_id
) == TEMPLATE_ID_EXPR
7367 && TREE_CODE (type
) != FUNCTION_TYPE
7368 && TREE_CODE (type
) != METHOD_TYPE
)
7370 error ("template-id `%D' used as a declarator",
7372 unqualified_id
= dname
;
7375 /* If DECLARATOR is non-NULL, we know it is a cdk_id declarator;
7376 otherwise, we would not have exited the loop above. */
7378 && TREE_CODE (declarator
->u
.id
.name
) == SCOPE_REF
7379 /* If the qualifying scope was invalid, it will have been set to
7381 && TREE_OPERAND (declarator
->u
.id
.name
, 0)
7382 && TYPE_P (TREE_OPERAND (declarator
->u
.id
.name
, 0)))
7386 ctype
= TREE_OPERAND (declarator
->u
.id
.name
, 0);
7388 ctype
= TYPE_MAIN_VARIANT (ctype
);
7390 while (t
!= NULL_TREE
&& CLASS_TYPE_P (t
))
7392 /* You're supposed to have one `template <...>' for every
7393 template class, but you don't need one for a full
7394 specialization. For example:
7396 template <class T> struct S{};
7397 template <> struct S<int> { void f(); };
7398 void S<int>::f () {}
7400 is correct; there shouldn't be a `template <>' for the
7401 definition of `S<int>::f'. */
7402 if (CLASSTYPE_TEMPLATE_INFO (t
)
7403 && (CLASSTYPE_TEMPLATE_INSTANTIATION (t
)
7404 || uses_template_parms (CLASSTYPE_TI_ARGS (t
)))
7405 && PRIMARY_TEMPLATE_P (CLASSTYPE_TI_TEMPLATE (t
)))
7406 template_count
+= 1;
7408 t
= TYPE_MAIN_DECL (t
);
7409 t
= DECL_CONTEXT (t
);
7412 if (ctype
== current_class_type
)
7418 Is this ill-formed? */
7421 pedwarn ("extra qualification `%T::' on member `%s' ignored",
7424 else if (TREE_CODE (type
) == FUNCTION_TYPE
)
7426 tree sname
= TREE_OPERAND (declarator
->u
.id
.name
, 1);
7428 if (TREE_CODE (sname
) == IDENTIFIER_NODE
7429 && NEW_DELETE_OPNAME_P (sname
))
7430 /* Overloaded operator new and operator delete
7431 are always static functions. */
7433 else if (current_class_type
== NULL_TREE
|| friendp
)
7435 = build_method_type_directly (ctype
,
7437 TYPE_ARG_TYPES (type
));
7440 error ("cannot declare member function `%T::%s' within `%T'",
7441 ctype
, name
, current_class_type
);
7442 return error_mark_node
;
7445 else if (declspecs
->specs
[(int)ds_typedef
]
7446 || COMPLETE_TYPE_P (complete_type (ctype
)))
7448 /* Have to move this code elsewhere in this function.
7449 this code is used for i.e., typedef int A::M; M *pm;
7451 It is? How? jason 10/2/94 */
7453 if (current_class_type
)
7455 error ("cannot declare member `%T::%s' within `%T'",
7456 ctype
, name
, current_class_type
);
7457 return void_type_node
;
7462 cxx_incomplete_type_error (NULL_TREE
, ctype
);
7463 return error_mark_node
;
7470 *attrlist
= chainon (returned_attrs
, *attrlist
);
7472 attrlist
= &returned_attrs
;
7475 /* Now TYPE has the actual type. */
7477 /* Did array size calculations overflow? */
7479 if (TREE_CODE (type
) == ARRAY_TYPE
7480 && COMPLETE_TYPE_P (type
)
7481 && TREE_OVERFLOW (TYPE_SIZE (type
)))
7483 error ("size of array `%s' is too large", name
);
7484 /* If we proceed with the array type as it is, we'll eventually
7485 crash in tree_low_cst(). */
7486 type
= error_mark_node
;
7489 if ((decl_context
== FIELD
|| decl_context
== PARM
)
7490 && !processing_template_decl
7491 && variably_modified_type_p (type
, NULL_TREE
))
7493 if (decl_context
== FIELD
)
7494 error ("data member may not have variably modified type `%T'", type
);
7496 error ("parameter may not have variably modified type `%T'", type
);
7497 type
= error_mark_node
;
7500 if (explicitp
== 1 || (explicitp
&& friendp
))
7502 /* [dcl.fct.spec] The explicit specifier shall only be used in
7503 declarations of constructors within a class definition. */
7504 error ("only declarations of constructors can be `explicit'");
7508 if (storage_class
== sc_mutable
)
7510 if (decl_context
!= FIELD
|| friendp
)
7512 error ("non-member `%s' cannot be declared `mutable'", name
);
7513 storage_class
= sc_none
;
7515 else if (decl_context
== TYPENAME
|| declspecs
->specs
[(int)ds_typedef
])
7517 error ("non-object member `%s' cannot be declared `mutable'", name
);
7518 storage_class
= sc_none
;
7520 else if (TREE_CODE (type
) == FUNCTION_TYPE
7521 || TREE_CODE (type
) == METHOD_TYPE
)
7523 error ("function `%s' cannot be declared `mutable'", name
);
7524 storage_class
= sc_none
;
7528 error ("static `%s' cannot be declared `mutable'", name
);
7529 storage_class
= sc_none
;
7531 else if (type_quals
& TYPE_QUAL_CONST
)
7533 error ("const `%s' cannot be declared `mutable'", name
);
7534 storage_class
= sc_none
;
7538 /* If this is declaring a typedef name, return a TYPE_DECL. */
7539 if (declspecs
->specs
[(int)ds_typedef
] && decl_context
!= TYPENAME
)
7543 /* Note that the grammar rejects storage classes
7544 in typenames, fields or parameters. */
7545 if (current_lang_name
== lang_name_java
)
7546 TYPE_FOR_JAVA (type
) = 1;
7548 if (decl_context
== FIELD
)
7550 if (constructor_name_p (unqualified_id
, current_class_type
))
7551 pedwarn ("ISO C++ forbids nested type `%D' with same name as enclosing class",
7553 decl
= build_lang_decl (TYPE_DECL
, unqualified_id
, type
);
7557 decl
= build_decl (TYPE_DECL
, unqualified_id
, type
);
7558 if (in_namespace
|| ctype
)
7559 error ("%Jtypedef name may not be a nested-name-specifier", decl
);
7560 if (!current_function_decl
)
7561 DECL_CONTEXT (decl
) = FROB_CONTEXT (current_namespace
);
7564 /* If the user declares "typedef struct {...} foo" then the
7565 struct will have an anonymous name. Fill that name in now.
7566 Nothing can refer to it, so nothing needs know about the name
7568 if (type
!= error_mark_node
7571 && TREE_CODE (TYPE_NAME (type
)) == TYPE_DECL
7572 && TYPE_ANONYMOUS_P (type
)
7573 /* Don't do this if there are attributes. */
7574 && (!attrlist
|| !*attrlist
)
7575 && cp_type_quals (type
) == TYPE_UNQUALIFIED
)
7577 tree oldname
= TYPE_NAME (type
);
7580 /* Replace the anonymous name with the real name everywhere. */
7581 lookup_tag_reverse (type
, unqualified_id
);
7582 for (t
= TYPE_MAIN_VARIANT (type
); t
; t
= TYPE_NEXT_VARIANT (t
))
7583 if (TYPE_NAME (t
) == oldname
)
7584 TYPE_NAME (t
) = decl
;
7586 if (TYPE_LANG_SPECIFIC (type
))
7587 TYPE_WAS_ANONYMOUS (type
) = 1;
7589 /* If this is a typedef within a template class, the nested
7590 type is a (non-primary) template. The name for the
7591 template needs updating as well. */
7592 if (TYPE_LANG_SPECIFIC (type
) && CLASSTYPE_TEMPLATE_INFO (type
))
7593 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type
))
7594 = TYPE_IDENTIFIER (type
);
7596 /* FIXME remangle member functions; member functions of a
7597 type with external linkage have external linkage. */
7602 if (ctype
== NULL_TREE
)
7604 if (TREE_CODE (type
) != METHOD_TYPE
)
7605 error ("%Jinvalid type qualifier for non-member function type",
7608 ctype
= TYPE_METHOD_BASETYPE (type
);
7610 if (ctype
!= NULL_TREE
)
7611 grok_method_quals (ctype
, decl
, quals
);
7615 || (typedef_decl
&& C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl
)))
7616 C_TYPEDEF_EXPLICITLY_SIGNED (decl
) = 1;
7618 bad_specifiers (decl
, "type", virtualp
, quals
!= TYPE_UNQUALIFIED
,
7619 inlinep
, friendp
, raises
!= NULL_TREE
);
7624 /* Detect the case of an array type of unspecified size
7625 which came, as such, direct from a typedef name.
7626 We must copy the type, so that the array's domain can be
7627 individually set by the object's initializer. */
7629 if (type
&& typedef_type
7630 && TREE_CODE (type
) == ARRAY_TYPE
&& !TYPE_DOMAIN (type
)
7631 && TYPE_MAIN_VARIANT (type
) == TYPE_MAIN_VARIANT (typedef_type
))
7632 type
= build_cplus_array_type (TREE_TYPE (type
), NULL_TREE
);
7634 /* Detect where we're using a typedef of function type to declare a
7635 function. PARMS will not be set, so we must create it now. */
7637 if (type
== typedef_type
&& TREE_CODE (type
) == FUNCTION_TYPE
)
7639 tree decls
= NULL_TREE
;
7642 for (args
= TYPE_ARG_TYPES (type
); args
; args
= TREE_CHAIN (args
))
7644 tree decl
= cp_build_parm_decl (NULL_TREE
, TREE_VALUE (args
));
7646 TREE_CHAIN (decl
) = decls
;
7650 parms
= nreverse (decls
);
7653 /* If this is a type name (such as, in a cast or sizeof),
7654 compute the type and return it now. */
7656 if (decl_context
== TYPENAME
)
7658 /* Note that the grammar rejects storage classes
7659 in typenames, fields or parameters. */
7660 if (type_quals
!= TYPE_UNQUALIFIED
)
7661 type_quals
= TYPE_UNQUALIFIED
;
7663 /* Special case: "friend class foo" looks like a TYPENAME context. */
7666 if (type_quals
!= TYPE_UNQUALIFIED
)
7668 error ("type qualifiers specified for friend class declaration");
7669 type_quals
= TYPE_UNQUALIFIED
;
7673 error ("`inline' specified for friend class declaration");
7679 /* Don't allow friend declaration without a class-key. */
7680 if (TREE_CODE (type
) == TEMPLATE_TYPE_PARM
)
7681 pedwarn ("template parameters cannot be friends");
7682 else if (TREE_CODE (type
) == TYPENAME_TYPE
)
7683 pedwarn ("friend declaration requires class-key, "
7684 "i.e. `friend class %T::%D'",
7685 TYPE_CONTEXT (type
), TYPENAME_TYPE_FULLNAME (type
));
7687 pedwarn ("friend declaration requires class-key, "
7688 "i.e. `friend %#T'",
7692 /* Only try to do this stuff if we didn't already give up. */
7693 if (type
!= integer_type_node
)
7695 /* A friendly class? */
7696 if (current_class_type
)
7697 make_friend_class (current_class_type
, TYPE_MAIN_VARIANT (type
),
7700 error ("trying to make class `%T' a friend of global scope",
7703 type
= void_type_node
;
7708 if (ctype
== NULL_TREE
)
7710 if (TREE_CODE (type
) != METHOD_TYPE
)
7711 error ("invalid qualifiers on non-member function type");
7713 ctype
= TYPE_METHOD_BASETYPE (type
);
7717 tree dummy
= build_decl (TYPE_DECL
, unqualified_id
, type
);
7718 grok_method_quals (ctype
, dummy
, quals
);
7719 type
= TREE_TYPE (dummy
);
7725 else if (unqualified_id
== NULL_TREE
&& decl_context
!= PARM
7726 && decl_context
!= CATCHPARM
7727 && TREE_CODE (type
) != UNION_TYPE
7730 error ("abstract declarator `%T' used as declaration", type
);
7731 unqualified_id
= make_anon_name ();
7734 /* `void' at top level (not within pointer)
7735 is allowed only in typedefs or type names.
7736 We don't complain about parms either, but that is because
7737 a better error message can be made later. */
7739 if (TREE_CODE (type
) == VOID_TYPE
&& decl_context
!= PARM
)
7741 if (! unqualified_id
)
7742 error ("unnamed variable or field declared void");
7743 else if (TREE_CODE (unqualified_id
) == IDENTIFIER_NODE
)
7745 gcc_assert (!IDENTIFIER_OPNAME_P (unqualified_id
));
7746 error ("variable or field `%s' declared void", name
);
7749 error ("variable or field declared void");
7750 type
= integer_type_node
;
7753 /* Now create the decl, which may be a VAR_DECL, a PARM_DECL
7754 or a FUNCTION_DECL, depending on DECL_CONTEXT and TYPE. */
7756 if (decl_context
== PARM
|| decl_context
== CATCHPARM
)
7758 if (ctype
|| in_namespace
)
7759 error ("cannot use `::' in parameter declaration");
7761 /* A parameter declared as an array of T is really a pointer to T.
7762 One declared as a function is really a pointer to a function.
7763 One declared as a member is really a pointer to member. */
7765 if (TREE_CODE (type
) == ARRAY_TYPE
)
7767 /* Transfer const-ness of array into that of type pointed to. */
7768 type
= build_pointer_type (TREE_TYPE (type
));
7769 type_quals
= TYPE_UNQUALIFIED
;
7771 else if (TREE_CODE (type
) == FUNCTION_TYPE
)
7772 type
= build_pointer_type (type
);
7778 if (decl_context
== PARM
)
7780 decl
= cp_build_parm_decl (unqualified_id
, type
);
7782 bad_specifiers (decl
, "parameter", virtualp
, quals
!= TYPE_UNQUALIFIED
,
7783 inlinep
, friendp
, raises
!= NULL_TREE
);
7785 else if (decl_context
== FIELD
)
7787 /* The C99 flexible array extension. */
7788 if (!staticp
&& TREE_CODE (type
) == ARRAY_TYPE
7789 && TYPE_DOMAIN (type
) == NULL_TREE
)
7791 tree itype
= compute_array_index_type (dname
, integer_zero_node
);
7792 type
= build_cplus_array_type (TREE_TYPE (type
), itype
);
7795 if (type
== error_mark_node
)
7797 /* Happens when declaring arrays of sizes which
7798 are error_mark_node, for example. */
7801 else if (in_namespace
&& !friendp
)
7803 /* Something like struct S { int N::j; }; */
7804 error ("invalid use of `::'");
7807 else if (TREE_CODE (type
) == FUNCTION_TYPE
)
7810 tree function_context
;
7812 /* We catch the others as conflicts with the builtin
7814 if (friendp
&& unqualified_id
== ridpointers
[(int) RID_SIGNED
])
7816 error ("function `%D' cannot be declared friend",
7823 if (ctype
== NULL_TREE
)
7824 ctype
= current_class_type
;
7826 if (ctype
== NULL_TREE
)
7828 error ("can't make `%D' into a method -- not in a class",
7830 return void_type_node
;
7833 /* ``A union may [ ... ] not [ have ] virtual functions.''
7835 if (virtualp
&& TREE_CODE (ctype
) == UNION_TYPE
)
7837 error ("function `%D' declared virtual inside a union",
7839 return void_type_node
;
7842 if (NEW_DELETE_OPNAME_P (unqualified_id
))
7846 error ("`%D' cannot be declared virtual, since it is always static",
7851 else if (staticp
< 2)
7852 type
= build_method_type_directly (ctype
,
7854 TYPE_ARG_TYPES (type
));
7857 /* Tell grokfndecl if it needs to set TREE_PUBLIC on the node. */
7858 function_context
= (ctype
!= NULL_TREE
) ?
7859 decl_function_context (TYPE_MAIN_DECL (ctype
)) : NULL_TREE
;
7860 publicp
= (! friendp
|| ! staticp
)
7861 && function_context
== NULL_TREE
;
7862 decl
= grokfndecl (ctype
, type
,
7863 TREE_CODE (unqualified_id
) != TEMPLATE_ID_EXPR
7864 ? unqualified_id
: dname
,
7867 virtualp
, flags
, quals
, raises
,
7868 friendp
? -1 : 0, friendp
, publicp
, inlinep
,
7869 funcdef_flag
, template_count
, in_namespace
, attrlist
);
7870 if (decl
== NULL_TREE
)
7873 /* This clobbers the attrs stored in `decl' from `attrlist'. */
7874 /* The decl and setting of decl_attr is also turned off. */
7875 decl
= build_decl_attribute_variant (decl
, decl_attr
);
7878 /* [class.conv.ctor]
7880 A constructor declared without the function-specifier
7881 explicit that can be called with a single parameter
7882 specifies a conversion from the type of its first
7883 parameter to the type of its class. Such a constructor
7884 is called a converting constructor. */
7886 DECL_NONCONVERTING_P (decl
) = 1;
7887 else if (DECL_CONSTRUCTOR_P (decl
))
7889 /* The constructor can be called with exactly one
7890 parameter if there is at least one parameter, and
7891 any subsequent parameters have default arguments.
7892 Ignore any compiler-added parms. */
7893 tree arg_types
= FUNCTION_FIRST_USER_PARMTYPE (decl
);
7895 if (arg_types
== void_list_node
7897 && TREE_CHAIN (arg_types
)
7898 && TREE_CHAIN (arg_types
) != void_list_node
7899 && !TREE_PURPOSE (TREE_CHAIN (arg_types
))))
7900 DECL_NONCONVERTING_P (decl
) = 1;
7903 else if (TREE_CODE (type
) == METHOD_TYPE
)
7905 /* We only get here for friend declarations of
7906 members of other classes. */
7907 /* All method decls are public, so tell grokfndecl to set
7908 TREE_PUBLIC, also. */
7909 decl
= grokfndecl (ctype
, type
,
7910 TREE_CODE (unqualified_id
) != TEMPLATE_ID_EXPR
7911 ? unqualified_id
: dname
,
7914 virtualp
, flags
, quals
, raises
,
7915 friendp
? -1 : 0, friendp
, 1, 0, funcdef_flag
,
7916 template_count
, in_namespace
, attrlist
);
7917 if (decl
== NULL_TREE
)
7920 else if (!staticp
&& !dependent_type_p (type
)
7921 && !COMPLETE_TYPE_P (complete_type (type
))
7922 && (TREE_CODE (type
) != ARRAY_TYPE
|| initialized
== 0))
7925 error ("field `%D' has incomplete type", unqualified_id
);
7927 error ("name `%T' has incomplete type", type
);
7929 /* If we're instantiating a template, tell them which
7930 instantiation made the field's type be incomplete. */
7931 if (current_class_type
7932 && TYPE_NAME (current_class_type
)
7933 && IDENTIFIER_TEMPLATE (TYPE_IDENTIFIER (current_class_type
))
7935 && declspecs
->type
== type
)
7936 error (" in instantiation of template `%T'",
7937 current_class_type
);
7939 type
= error_mark_node
;
7946 error ("`%E' is neither function nor member function; "
7947 "cannot be declared friend", unqualified_id
);
7955 /* Friends are treated specially. */
7956 if (ctype
== current_class_type
)
7957 warning ("member functions are implicitly friends of their class");
7958 else if (decl
&& DECL_NAME (decl
))
7960 if (template_class_depth (current_class_type
) == 0)
7962 decl
= check_explicit_specialization
7963 (unqualified_id
, decl
, template_count
,
7964 2 * (funcdef_flag
!= 0) + 4);
7965 if (decl
== error_mark_node
)
7966 return error_mark_node
;
7969 decl
= do_friend (ctype
, unqualified_id
, decl
,
7970 *attrlist
, flags
, quals
, funcdef_flag
);
7974 return void_type_node
;
7977 /* Structure field. It may not be a function, except for C++. */
7979 if (decl
== NULL_TREE
)
7985 /* An attempt is being made to initialize a non-static
7986 member. But, from [class.mem]:
7988 4 A member-declarator can contain a
7989 constant-initializer only if it declares a static
7990 member (_class.static_) of integral or enumeration
7991 type, see _class.static.data_.
7993 This used to be relatively common practice, but
7994 the rest of the compiler does not correctly
7995 handle the initialization unless the member is
7996 static so we make it static below. */
7997 pedwarn ("ISO C++ forbids initialization of member `%D'",
7999 pedwarn ("making `%D' static", unqualified_id
);
8003 if (uses_template_parms (type
))
8004 /* We'll check at instantiation time. */
8006 else if (check_static_variable_definition (unqualified_id
,
8008 /* If we just return the declaration, crashes
8009 will sometimes occur. We therefore return
8010 void_type_node, as if this was a friend
8011 declaration, to cause callers to completely
8012 ignore this declaration. */
8013 return void_type_node
;
8018 /* C++ allows static class members. All other work
8019 for this is done by grokfield. */
8020 decl
= build_lang_decl (VAR_DECL
, unqualified_id
, type
);
8021 set_linkage_for_static_data_member (decl
);
8022 /* Even if there is an in-class initialization, DECL
8023 is considered undefined until an out-of-class
8024 definition is provided. */
8025 DECL_EXTERNAL (decl
) = 1;
8029 decl
= build_decl (FIELD_DECL
, unqualified_id
, type
);
8030 DECL_NONADDRESSABLE_P (decl
) = bitfield
;
8031 if (storage_class
== sc_mutable
)
8033 DECL_MUTABLE_P (decl
) = 1;
8034 storage_class
= sc_none
;
8038 bad_specifiers (decl
, "field", virtualp
, quals
!= TYPE_UNQUALIFIED
,
8039 inlinep
, friendp
, raises
!= NULL_TREE
);
8042 else if (TREE_CODE (type
) == FUNCTION_TYPE
8043 || TREE_CODE (type
) == METHOD_TYPE
)
8048 if (!unqualified_id
)
8051 if (TREE_CODE (unqualified_id
) == TEMPLATE_ID_EXPR
)
8052 original_name
= dname
;
8054 original_name
= unqualified_id
;
8056 if (storage_class
== sc_auto
)
8057 error ("storage class `auto' invalid for function `%s'", name
);
8058 else if (storage_class
== sc_register
)
8059 error ("storage class `register' invalid for function `%s'", name
);
8061 error ("storage class `__thread' invalid for function `%s'", name
);
8063 /* Function declaration not at top level.
8064 Storage classes other than `extern' are not allowed
8065 and `extern' makes no difference. */
8066 if (! toplevel_bindings_p ()
8067 && (storage_class
== sc_static
8068 || declspecs
->specs
[(int)ds_inline
])
8071 if (storage_class
== sc_static
)
8072 pedwarn ("`static' specified invalid for function `%s' declared out of global scope", name
);
8074 pedwarn ("`inline' specifier invalid for function `%s' declared out of global scope", name
);
8077 if (ctype
== NULL_TREE
)
8081 error ("virtual non-class function `%s'", name
);
8085 else if (TREE_CODE (type
) == FUNCTION_TYPE
&& staticp
< 2
8086 && !NEW_DELETE_OPNAME_P (original_name
))
8087 type
= build_method_type_directly (ctype
,
8089 TYPE_ARG_TYPES (type
));
8091 /* Record presence of `static'. */
8092 publicp
= (ctype
!= NULL_TREE
8093 || storage_class
== sc_extern
8094 || storage_class
!= sc_static
);
8096 decl
= grokfndecl (ctype
, type
, original_name
, parms
, unqualified_id
,
8097 virtualp
, flags
, quals
, raises
,
8099 publicp
, inlinep
, funcdef_flag
,
8100 template_count
, in_namespace
, attrlist
);
8101 if (decl
== NULL_TREE
)
8106 int invalid_static
= 0;
8108 /* Don't allow a static member function in a class, and forbid
8109 declaring main to be static. */
8110 if (TREE_CODE (type
) == METHOD_TYPE
)
8112 pedwarn ("cannot declare member function `%D' to have static linkage", decl
);
8115 else if (current_function_decl
)
8117 /* FIXME need arm citation */
8118 error ("cannot declare static function inside another function");
8125 storage_class
= sc_none
;
8131 /* It's a variable. */
8133 /* An uninitialized decl with `extern' is a reference. */
8134 decl
= grokvardecl (type
, unqualified_id
,
8137 (type_quals
& TYPE_QUAL_CONST
) != 0,
8138 ctype
? ctype
: in_namespace
);
8139 bad_specifiers (decl
, "variable", virtualp
, quals
!= TYPE_UNQUALIFIED
,
8140 inlinep
, friendp
, raises
!= NULL_TREE
);
8144 DECL_CONTEXT (decl
) = ctype
;
8147 pedwarn ("`static' may not be used when defining (as opposed to declaring) a static data member");
8149 storage_class
= sc_none
;
8151 if (storage_class
== sc_register
&& TREE_STATIC (decl
))
8153 error ("static member `%D' declared `register'", decl
);
8154 storage_class
= sc_none
;
8156 if (storage_class
== sc_extern
&& pedantic
)
8158 pedwarn ("cannot explicitly declare member `%#D' to have extern linkage",
8160 storage_class
= sc_none
;
8165 /* Record `register' declaration for warnings on &
8166 and in case doing stupid register allocation. */
8168 if (storage_class
== sc_register
)
8169 DECL_REGISTER (decl
) = 1;
8170 else if (storage_class
== sc_extern
)
8171 DECL_THIS_EXTERN (decl
) = 1;
8172 else if (storage_class
== sc_static
)
8173 DECL_THIS_STATIC (decl
) = 1;
8175 /* Record constancy and volatility. There's no need to do this
8176 when processing a template; we'll do this for the instantiated
8177 declaration based on the type of DECL. */
8178 if (!processing_template_decl
)
8179 c_apply_type_quals_to_decl (type_quals
, decl
);
8185 /* Subroutine of start_function. Ensure that each of the parameter
8186 types (as listed in PARMS) is complete, as is required for a
8187 function definition. */
8190 require_complete_types_for_parms (tree parms
)
8192 for (; parms
; parms
= TREE_CHAIN (parms
))
8194 if (VOID_TYPE_P (TREE_TYPE (parms
)))
8195 /* grokparms will have already issued an error. */
8196 TREE_TYPE (parms
) = error_mark_node
;
8197 else if (complete_type_or_else (TREE_TYPE (parms
), parms
))
8199 layout_decl (parms
, 0);
8200 DECL_ARG_TYPE (parms
) = type_passed_as (TREE_TYPE (parms
));
8205 /* Returns nonzero if T is a local variable. */
8208 local_variable_p (tree t
)
8210 if ((TREE_CODE (t
) == VAR_DECL
8211 /* A VAR_DECL with a context that is a _TYPE is a static data
8213 && !TYPE_P (CP_DECL_CONTEXT (t
))
8214 /* Any other non-local variable must be at namespace scope. */
8215 && !DECL_NAMESPACE_SCOPE_P (t
))
8216 || (TREE_CODE (t
) == PARM_DECL
))
8222 /* Returns nonzero if T is an automatic local variable or a label.
8223 (These are the declarations that need to be remapped when the code
8224 containing them is duplicated.) */
8227 nonstatic_local_decl_p (tree t
)
8229 return ((local_variable_p (t
) && !TREE_STATIC (t
))
8230 || TREE_CODE (t
) == LABEL_DECL
8231 || TREE_CODE (t
) == RESULT_DECL
);
8234 /* Like local_variable_p, but suitable for use as a tree-walking
8238 local_variable_p_walkfn (tree
*tp
, int *walk_subtrees
,
8239 void *data ATTRIBUTE_UNUSED
)
8241 if (local_variable_p (*tp
) && !DECL_ARTIFICIAL (*tp
))
8243 else if (TYPE_P (*tp
))
8250 /* Check that ARG, which is a default-argument expression for a
8251 parameter DECL, is valid. Returns ARG, or ERROR_MARK_NODE, if
8252 something goes wrong. DECL may also be a _TYPE node, rather than a
8253 DECL, if there is no DECL available. */
8256 check_default_argument (tree decl
, tree arg
)
8261 if (TREE_CODE (arg
) == DEFAULT_ARG
)
8262 /* We get a DEFAULT_ARG when looking at an in-class declaration
8263 with a default argument. Ignore the argument for now; we'll
8264 deal with it after the class is complete. */
8267 if (processing_template_decl
|| uses_template_parms (arg
))
8268 /* We don't do anything checking until instantiation-time. Note
8269 that there may be uninstantiated arguments even for an
8270 instantiated function, since default arguments are not
8271 instantiated until they are needed. */
8280 decl_type
= TREE_TYPE (decl
);
8282 if (arg
== error_mark_node
8283 || decl
== error_mark_node
8284 || TREE_TYPE (arg
) == error_mark_node
8285 || decl_type
== error_mark_node
)
8286 /* Something already went wrong. There's no need to check
8288 return error_mark_node
;
8290 /* [dcl.fct.default]
8292 A default argument expression is implicitly converted to the
8294 if (!TREE_TYPE (arg
)
8295 || !can_convert_arg (decl_type
, TREE_TYPE (arg
), arg
))
8298 error ("default argument for `%#D' has type `%T'",
8299 decl
, TREE_TYPE (arg
));
8301 error ("default argument for parameter of type `%T' has type `%T'",
8302 decl_type
, TREE_TYPE (arg
));
8304 return error_mark_node
;
8307 /* [dcl.fct.default]
8309 Local variables shall not be used in default argument
8312 The keyword `this' shall not be used in a default argument of a
8314 var
= walk_tree_without_duplicates (&arg
, local_variable_p_walkfn
,
8318 error ("default argument `%E' uses local variable `%D'",
8320 return error_mark_node
;
8327 /* Decode the list of parameter types for a function type.
8328 Given the list of things declared inside the parens,
8329 return a list of types.
8331 If this parameter does not end with an ellipsis, we append
8334 *PARMS is set to the chain of PARM_DECLs created. */
8337 grokparms (cp_parameter_declarator
*first_parm
, tree
*parms
)
8339 tree result
= NULL_TREE
;
8340 tree decls
= NULL_TREE
;
8341 int ellipsis
= !first_parm
|| first_parm
->ellipsis_p
;
8342 cp_parameter_declarator
*parm
;
8345 for (parm
= first_parm
; parm
!= NULL
; parm
= parm
->next
)
8347 tree type
= NULL_TREE
;
8348 tree init
= parm
->default_argument
;
8352 if (parm
== no_parameters
)
8355 attrs
= parm
->decl_specifiers
.attributes
;
8356 parm
->decl_specifiers
.attributes
= NULL_TREE
;
8357 decl
= grokdeclarator (parm
->declarator
, &parm
->decl_specifiers
,
8358 PARM
, init
!= NULL_TREE
, &attrs
);
8359 if (! decl
|| TREE_TYPE (decl
) == error_mark_node
)
8363 cplus_decl_attributes (&decl
, attrs
, 0);
8365 type
= TREE_TYPE (decl
);
8366 if (VOID_TYPE_P (type
))
8368 if (same_type_p (type
, void_type_node
)
8369 && !DECL_NAME (decl
) && !result
&& !parm
->next
&& !ellipsis
)
8370 /* this is a parmlist of `(void)', which is ok. */
8372 cxx_incomplete_type_error (decl
, type
);
8373 /* It's not a good idea to actually create parameters of
8374 type `void'; other parts of the compiler assume that a
8375 void type terminates the parameter list. */
8376 type
= error_mark_node
;
8377 TREE_TYPE (decl
) = error_mark_node
;
8380 if (type
!= error_mark_node
)
8382 /* Top-level qualifiers on the parameters are
8383 ignored for function types. */
8384 type
= cp_build_qualified_type (type
, 0);
8385 if (TREE_CODE (type
) == METHOD_TYPE
)
8387 error ("parameter `%D' invalidly declared method type", decl
);
8388 type
= build_pointer_type (type
);
8389 TREE_TYPE (decl
) = type
;
8391 else if (abstract_virtuals_error (decl
, type
))
8392 any_error
= 1; /* Seems like a good idea. */
8393 else if (POINTER_TYPE_P (type
))
8395 /* [dcl.fct]/6, parameter types cannot contain pointers
8396 (references) to arrays of unknown bound. */
8397 tree t
= TREE_TYPE (type
);
8398 int ptr
= TYPE_PTR_P (type
);
8404 else if (TREE_CODE (t
) != ARRAY_TYPE
)
8406 else if (!TYPE_DOMAIN (t
))
8410 if (TREE_CODE (t
) == ARRAY_TYPE
)
8411 error ("parameter `%D' includes %s to array of unknown bound `%T'",
8412 decl
, ptr
? "pointer" : "reference", t
);
8415 if (!any_error
&& init
)
8416 init
= check_default_argument (decl
, init
);
8421 TREE_CHAIN (decl
) = decls
;
8423 result
= tree_cons (init
, type
, result
);
8425 decls
= nreverse (decls
);
8426 result
= nreverse (result
);
8428 result
= chainon (result
, void_list_node
);
8435 /* D is a constructor or overloaded `operator='.
8437 Let T be the class in which D is declared. Then, this function
8440 -1 if D's is an ill-formed constructor or copy assignment operator
8441 whose first parameter is of type `T'.
8442 0 if D is not a copy constructor or copy assignment
8444 1 if D is a copy constructor or copy assignment operator whose
8445 first parameter is a reference to const qualified T.
8446 2 if D is a copy constructor or copy assignment operator whose
8447 first parameter is a reference to non-const qualified T.
8449 This function can be used as a predicate. Positive values indicate
8450 a copy constructor and nonzero values indicate a copy assignment
8460 gcc_assert (DECL_FUNCTION_MEMBER_P (d
));
8462 if (DECL_TEMPLATE_INFO (d
) && is_member_template (DECL_TI_TEMPLATE (d
)))
8463 /* Instantiations of template member functions are never copy
8464 functions. Note that member functions of templated classes are
8465 represented as template functions internally, and we must
8466 accept those as copy functions. */
8469 args
= FUNCTION_FIRST_USER_PARMTYPE (d
);
8473 arg_type
= TREE_VALUE (args
);
8475 if (TYPE_MAIN_VARIANT (arg_type
) == DECL_CONTEXT (d
))
8477 /* Pass by value copy assignment operator. */
8480 else if (TREE_CODE (arg_type
) == REFERENCE_TYPE
8481 && TYPE_MAIN_VARIANT (TREE_TYPE (arg_type
)) == DECL_CONTEXT (d
))
8483 if (CP_TYPE_CONST_P (TREE_TYPE (arg_type
)))
8489 args
= TREE_CHAIN (args
);
8491 if (args
&& args
!= void_list_node
&& !TREE_PURPOSE (args
))
8492 /* There are more non-optional args. */
8498 /* Remember any special properties of member function DECL. */
8500 void grok_special_member_properties (tree decl
)
8502 if (!DECL_NONSTATIC_MEMBER_FUNCTION_P(decl
))
8503 ; /* Not special. */
8504 else if (DECL_CONSTRUCTOR_P (decl
))
8506 int ctor
= copy_fn_p (decl
);
8512 A non-template constructor for class X is a copy
8513 constructor if its first parameter is of type X&, const
8514 X&, volatile X& or const volatile X&, and either there
8515 are no other parameters or else all other parameters have
8516 default arguments. */
8517 TYPE_HAS_INIT_REF (DECL_CONTEXT (decl
)) = 1;
8519 TYPE_HAS_CONST_INIT_REF (DECL_CONTEXT (decl
)) = 1;
8521 else if (sufficient_parms_p (FUNCTION_FIRST_USER_PARMTYPE (decl
)))
8522 TYPE_HAS_DEFAULT_CONSTRUCTOR (DECL_CONTEXT (decl
)) = 1;
8524 else if (DECL_OVERLOADED_OPERATOR_P (decl
) == NOP_EXPR
)
8528 A non-template assignment operator for class X is a copy
8529 assignment operator if its parameter is of type X, X&, const
8530 X&, volatile X& or const volatile X&. */
8532 int assop
= copy_fn_p (decl
);
8536 TYPE_HAS_ASSIGN_REF (DECL_CONTEXT (decl
)) = 1;
8538 TYPE_HAS_CONST_ASSIGN_REF (DECL_CONTEXT (decl
)) = 1;
8543 /* Check a constructor DECL has the correct form. Complains
8544 if the class has a constructor of the form X(X). */
8547 grok_ctor_properties (tree ctype
, tree decl
)
8549 int ctor_parm
= copy_fn_p (decl
);
8555 A declaration of a constructor for a class X is ill-formed if
8556 its first parameter is of type (optionally cv-qualified) X
8557 and either there are no other parameters or else all other
8558 parameters have default arguments.
8560 We *don't* complain about member template instantiations that
8561 have this form, though; they can occur as we try to decide
8562 what constructor to use during overload resolution. Since
8563 overload resolution will never prefer such a constructor to
8564 the non-template copy constructor (which is either explicitly
8565 or implicitly defined), there's no need to worry about their
8566 existence. Theoretically, they should never even be
8567 instantiated, but that's hard to forestall. */
8568 error ("invalid constructor; you probably meant `%T (const %T&)'",
8576 /* An operator with this code is unary, but can also be binary. */
8579 ambi_op_p (enum tree_code code
)
8581 return (code
== INDIRECT_REF
8582 || code
== ADDR_EXPR
8583 || code
== CONVERT_EXPR
8584 || code
== NEGATE_EXPR
8585 || code
== PREINCREMENT_EXPR
8586 || code
== PREDECREMENT_EXPR
);
8589 /* An operator with this name can only be unary. */
8592 unary_op_p (enum tree_code code
)
8594 return (code
== TRUTH_NOT_EXPR
8595 || code
== BIT_NOT_EXPR
8596 || code
== COMPONENT_REF
8597 || code
== TYPE_EXPR
);
8600 /* DECL is a declaration for an overloaded operator. Returns true if
8601 the declaration is valid; false otherwise. If COMPLAIN is true,
8602 errors are issued for invalid declarations. */
8605 grok_op_properties (tree decl
, int friendp
, bool complain
)
8607 tree argtypes
= TYPE_ARG_TYPES (TREE_TYPE (decl
));
8609 int methodp
= (TREE_CODE (TREE_TYPE (decl
)) == METHOD_TYPE
);
8610 tree name
= DECL_NAME (decl
);
8611 enum tree_code operator_code
;
8615 /* Assume that the declaration is valid. */
8618 /* Count the number of arguments. */
8619 for (argtype
= argtypes
, arity
= 0;
8620 argtype
&& argtype
!= void_list_node
;
8621 argtype
= TREE_CHAIN (argtype
))
8624 if (current_class_type
== NULL_TREE
)
8627 if (DECL_CONV_FN_P (decl
))
8628 operator_code
= TYPE_EXPR
;
8632 #define DEF_OPERATOR(NAME, CODE, MANGLING, ARITY, ASSN_P) \
8633 if (ansi_opname (CODE) == name) \
8635 operator_code = (CODE); \
8638 else if (ansi_assopname (CODE) == name) \
8640 operator_code = (CODE); \
8641 DECL_ASSIGNMENT_OPERATOR_P (decl) = 1; \
8645 #include "operators.def"
8651 gcc_assert (operator_code
!= LAST_CPLUS_TREE_CODE
);
8652 SET_OVERLOADED_OPERATOR_CODE (decl
, operator_code
);
8656 switch (operator_code
)
8659 TYPE_HAS_NEW_OPERATOR (current_class_type
) = 1;
8663 TYPE_GETS_DELETE (current_class_type
) |= 1;
8667 TYPE_HAS_ARRAY_NEW_OPERATOR (current_class_type
) = 1;
8670 case VEC_DELETE_EXPR
:
8671 TYPE_GETS_DELETE (current_class_type
) |= 2;
8679 /* [basic.std.dynamic.allocation]/1:
8681 A program is ill-formed if an allocation function is declared
8682 in a namespace scope other than global scope or declared static
8685 The same also holds true for deallocation functions. */
8686 if (operator_code
== NEW_EXPR
|| operator_code
== VEC_NEW_EXPR
8687 || operator_code
== DELETE_EXPR
|| operator_code
== VEC_DELETE_EXPR
)
8689 if (DECL_NAMESPACE_SCOPE_P (decl
))
8691 if (CP_DECL_CONTEXT (decl
) != global_namespace
)
8692 error ("`%D' may not be declared within a namespace", decl
);
8693 else if (!TREE_PUBLIC (decl
))
8694 error ("`%D' may not be declared as static", decl
);
8698 if (operator_code
== NEW_EXPR
|| operator_code
== VEC_NEW_EXPR
)
8699 TREE_TYPE (decl
) = coerce_new_type (TREE_TYPE (decl
));
8700 else if (operator_code
== DELETE_EXPR
|| operator_code
== VEC_DELETE_EXPR
)
8701 TREE_TYPE (decl
) = coerce_delete_type (TREE_TYPE (decl
));
8704 /* An operator function must either be a non-static member function
8705 or have at least one parameter of a class, a reference to a class,
8706 an enumeration, or a reference to an enumeration. 13.4.0.6 */
8707 if (! methodp
|| DECL_STATIC_FUNCTION_P (decl
))
8709 if (operator_code
== TYPE_EXPR
8710 || operator_code
== CALL_EXPR
8711 || operator_code
== COMPONENT_REF
8712 || operator_code
== ARRAY_REF
8713 || operator_code
== NOP_EXPR
)
8714 error ("`%D' must be a nonstatic member function", decl
);
8719 if (DECL_STATIC_FUNCTION_P (decl
))
8720 error ("`%D' must be either a non-static member function or a non-member function", decl
);
8722 for (p
= argtypes
; p
&& p
!= void_list_node
; p
= TREE_CHAIN (p
))
8724 tree arg
= non_reference (TREE_VALUE (p
));
8725 /* IS_AGGR_TYPE, rather than CLASS_TYPE_P, is used
8726 because these checks are performed even on
8727 template functions. */
8728 if (IS_AGGR_TYPE (arg
) || TREE_CODE (arg
) == ENUMERAL_TYPE
)
8732 if (!p
|| p
== void_list_node
)
8737 error ("`%D' must have an argument of class or "
8745 /* There are no restrictions on the arguments to an overloaded
8747 if (operator_code
== CALL_EXPR
)
8750 if (IDENTIFIER_TYPENAME_P (name
) && ! DECL_TEMPLATE_INFO (decl
))
8752 tree t
= TREE_TYPE (name
);
8755 int ref
= (TREE_CODE (t
) == REFERENCE_TYPE
);
8756 const char *what
= 0;
8759 t
= TYPE_MAIN_VARIANT (TREE_TYPE (t
));
8761 if (TREE_CODE (t
) == VOID_TYPE
)
8763 else if (t
== current_class_type
)
8764 what
= "the same type";
8765 /* Don't force t to be complete here. */
8766 else if (IS_AGGR_TYPE (t
)
8767 && COMPLETE_TYPE_P (t
)
8768 && DERIVED_FROM_P (t
, current_class_type
))
8769 what
= "a base class";
8771 if (what
&& warn_conversion
)
8772 warning ("conversion to %s%s will never use a type conversion operator",
8773 ref
? "a reference to " : "", what
);
8776 if (operator_code
== COND_EXPR
)
8779 error ("ISO C++ prohibits overloading operator ?:");
8781 else if (ambi_op_p (operator_code
))
8784 /* We pick the one-argument operator codes by default, so
8785 we don't have to change anything. */
8787 else if (arity
== 2)
8789 /* If we thought this was a unary operator, we now know
8790 it to be a binary operator. */
8791 switch (operator_code
)
8794 operator_code
= MULT_EXPR
;
8798 operator_code
= BIT_AND_EXPR
;
8802 operator_code
= PLUS_EXPR
;
8806 operator_code
= MINUS_EXPR
;
8809 case PREINCREMENT_EXPR
:
8810 operator_code
= POSTINCREMENT_EXPR
;
8813 case PREDECREMENT_EXPR
:
8814 operator_code
= POSTDECREMENT_EXPR
;
8821 SET_OVERLOADED_OPERATOR_CODE (decl
, operator_code
);
8823 if ((operator_code
== POSTINCREMENT_EXPR
8824 || operator_code
== POSTDECREMENT_EXPR
)
8825 && ! processing_template_decl
8826 && ! same_type_p (TREE_VALUE (TREE_CHAIN (argtypes
)), integer_type_node
))
8829 error ("postfix `%D' must take `int' as its argument",
8833 ("postfix `%D' must take `int' as its second argument",
8840 error ("`%D' must take either zero or one argument", decl
);
8842 error ("`%D' must take either one or two arguments", decl
);
8845 /* More Effective C++ rule 6. */
8847 && (operator_code
== POSTINCREMENT_EXPR
8848 || operator_code
== POSTDECREMENT_EXPR
8849 || operator_code
== PREINCREMENT_EXPR
8850 || operator_code
== PREDECREMENT_EXPR
))
8852 tree arg
= TREE_VALUE (argtypes
);
8853 tree ret
= TREE_TYPE (TREE_TYPE (decl
));
8854 if (methodp
|| TREE_CODE (arg
) == REFERENCE_TYPE
)
8855 arg
= TREE_TYPE (arg
);
8856 arg
= TYPE_MAIN_VARIANT (arg
);
8857 if (operator_code
== PREINCREMENT_EXPR
8858 || operator_code
== PREDECREMENT_EXPR
)
8860 if (TREE_CODE (ret
) != REFERENCE_TYPE
8861 || !same_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (ret
)),
8863 warning ("prefix `%D' should return `%T'", decl
,
8864 build_reference_type (arg
));
8868 if (!same_type_p (TYPE_MAIN_VARIANT (ret
), arg
))
8869 warning ("postfix `%D' should return `%T'", decl
, arg
);
8873 else if (unary_op_p (operator_code
))
8878 error ("`%D' must take `void'", decl
);
8880 error ("`%D' must take exactly one argument", decl
);
8883 else /* if (binary_op_p (operator_code)) */
8888 error ("`%D' must take exactly one argument", decl
);
8890 error ("`%D' must take exactly two arguments", decl
);
8893 /* More Effective C++ rule 7. */
8895 && (operator_code
== TRUTH_ANDIF_EXPR
8896 || operator_code
== TRUTH_ORIF_EXPR
8897 || operator_code
== COMPOUND_EXPR
))
8898 warning ("user-defined `%D' always evaluates both arguments",
8902 /* Effective C++ rule 23. */
8905 && !DECL_ASSIGNMENT_OPERATOR_P (decl
)
8906 && (operator_code
== PLUS_EXPR
8907 || operator_code
== MINUS_EXPR
8908 || operator_code
== TRUNC_DIV_EXPR
8909 || operator_code
== MULT_EXPR
8910 || operator_code
== TRUNC_MOD_EXPR
)
8911 && TREE_CODE (TREE_TYPE (TREE_TYPE (decl
))) == REFERENCE_TYPE
)
8912 warning ("`%D' should return by value", decl
);
8915 for (; argtypes
&& argtypes
!= void_list_node
;
8916 argtypes
= TREE_CHAIN (argtypes
))
8917 if (TREE_PURPOSE (argtypes
))
8919 TREE_PURPOSE (argtypes
) = NULL_TREE
;
8920 if (operator_code
== POSTINCREMENT_EXPR
8921 || operator_code
== POSTDECREMENT_EXPR
)
8924 pedwarn ("`%D' cannot have default arguments", decl
);
8927 error ("`%D' cannot have default arguments", decl
);
8936 tag_name (enum tag_types code
)
8953 /* Name lookup in an elaborated-type-specifier (after the keyword
8954 indicated by TAG_CODE) has found the TYPE_DECL DECL. If the
8955 elaborated-type-specifier is invalid, issue a diagnostic and return
8956 error_mark_node; otherwise, return the *_TYPE to which it referred.
8957 If ALLOW_TEMPLATE_P is true, TYPE may be a class template. */
8960 check_elaborated_type_specifier (enum tag_types tag_code
,
8962 bool allow_template_p
)
8968 struct S { struct S *p; };
8970 name lookup will find the TYPE_DECL for the implicit "S::S"
8971 typedef. Adjust for that here. */
8972 if (DECL_SELF_REFERENCE_P (decl
))
8973 decl
= TYPE_NAME (TREE_TYPE (decl
));
8975 type
= TREE_TYPE (decl
);
8979 If the identifier resolves to a typedef-name or a template
8980 type-parameter, the elaborated-type-specifier is ill-formed.
8982 In other words, the only legitimate declaration to use in the
8983 elaborated type specifier is the implicit typedef created when
8984 the type is declared. */
8985 if (!DECL_IMPLICIT_TYPEDEF_P (decl
))
8987 error ("using typedef-name `%D' after `%s'", decl
, tag_name (tag_code
));
8988 return IS_AGGR_TYPE (type
) ? type
: error_mark_node
;
8991 if (TREE_CODE (type
) == TEMPLATE_TYPE_PARM
)
8993 error ("using template type parameter `%T' after `%s'",
8994 type
, tag_name (tag_code
));
8995 return error_mark_node
;
8997 else if (TREE_CODE (type
) != RECORD_TYPE
8998 && TREE_CODE (type
) != UNION_TYPE
8999 && tag_code
!= enum_type
)
9001 error ("`%T' referred to as `%s'", type
, tag_name (tag_code
));
9002 return error_mark_node
;
9004 else if (TREE_CODE (type
) != ENUMERAL_TYPE
9005 && tag_code
== enum_type
)
9007 error ("`%T' referred to as enum", type
);
9008 return error_mark_node
;
9010 else if (!allow_template_p
9011 && TREE_CODE (type
) == RECORD_TYPE
9012 && CLASSTYPE_IS_TEMPLATE (type
))
9014 /* If a class template appears as elaborated type specifier
9015 without a template header such as:
9017 template <class T> class C {};
9018 void f(class C); // No template header here
9020 then the required template argument is missing. */
9022 error ("template argument required for `%s %T'",
9023 tag_name (tag_code
),
9024 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type
)));
9025 return error_mark_node
;
9031 /* Get the struct, enum or union (TAG_CODE says which) with tag NAME.
9032 Define the tag as a forward-reference if it is not defined.
9034 If a declaration is given, process it here, and report an error if
9035 multiple declarations are not identical.
9037 GLOBALIZE is false when this is also a definition. Only look in
9038 the current frame for the name (since C++ allows new names in any
9041 TEMPLATE_HEADER_P is true when this declaration is preceded by
9042 a set of template parameters. */
9045 xref_tag (enum tag_types tag_code
, tree name
,
9046 bool globalize
, bool template_header_p
)
9048 enum tree_code code
;
9050 struct cp_binding_level
*b
= current_binding_level
;
9051 tree context
= NULL_TREE
;
9053 timevar_push (TV_NAME_LOOKUP
);
9055 gcc_assert (TREE_CODE (name
) == IDENTIFIER_NODE
);
9067 code
= ENUMERAL_TYPE
;
9075 /* If we know we are defining this tag, only look it up in
9076 this scope and don't try to find it as a type. */
9077 t
= lookup_tag (code
, name
, b
, 1);
9081 tree decl
= lookup_name (name
, 2);
9083 if (decl
&& DECL_CLASS_TEMPLATE_P (decl
))
9084 decl
= DECL_TEMPLATE_RESULT (decl
);
9086 if (decl
&& TREE_CODE (decl
) == TYPE_DECL
)
9088 /* Two cases we need to consider when deciding if a class
9089 template is allowed as an elaborated type specifier:
9090 1. It is a self reference to its own class.
9091 2. It comes with a template header.
9095 template <class T> class C {
9096 class C *c1; // DECL_SELF_REFERENCE_P is true
9099 template <class U> class C; // template_header_p is true
9100 template <class T> class C<T>::D {
9101 class C *c2; // DECL_SELF_REFERENCE_P is true
9104 t
= check_elaborated_type_specifier (tag_code
,
9107 | DECL_SELF_REFERENCE_P (decl
));
9108 if (t
== error_mark_node
)
9109 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP
, error_mark_node
);
9114 if (t
&& current_class_type
9115 && template_class_depth (current_class_type
)
9116 && template_header_p
)
9118 /* Since GLOBALIZE is nonzero, we are not looking at a
9119 definition of this tag. Since, in addition, we are currently
9120 processing a (member) template declaration of a template
9121 class, we must be very careful; consider:
9128 { template <class V>
9129 friend struct S1; };
9131 Here, the S2::S1 declaration should not be confused with the
9132 outer declaration. In particular, the inner version should
9133 have a template parameter of level 2, not level 1. This
9134 would be particularly important if the member declaration
9137 template <class V = U> friend struct S1;
9139 say, when we should tsubst into `U' when instantiating
9140 S2. On the other hand, when presented with:
9150 we must find the inner binding eventually. We
9151 accomplish this by making sure that the new type we
9152 create to represent this declaration has the right
9154 context
= TYPE_CONTEXT (t
);
9161 /* If no such tag is yet defined, create a forward-reference node
9162 and record it as the "definition".
9163 When a real declaration of this type is found,
9164 the forward-reference will be altered into a real type. */
9165 if (code
== ENUMERAL_TYPE
)
9167 error ("use of enum `%#D' without previous declaration", name
);
9168 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP
, error_mark_node
);
9172 t
= make_aggr_type (code
);
9173 TYPE_CONTEXT (t
) = context
;
9174 pushtag (name
, t
, globalize
);
9179 if (!globalize
&& processing_template_decl
&& IS_AGGR_TYPE (t
))
9180 redeclare_class_template (t
, current_template_parms
);
9181 else if (!processing_template_decl
9183 && CLASSTYPE_IS_TEMPLATE (t
))
9185 error ("redeclaration of `%T' as a non-template", t
);
9186 t
= error_mark_node
;
9190 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP
, t
);
9194 xref_tag_from_type (tree old
, tree id
, int globalize
)
9196 enum tag_types tag_kind
;
9198 if (TREE_CODE (old
) == RECORD_TYPE
)
9199 tag_kind
= (CLASSTYPE_DECLARED_CLASS (old
) ? class_type
: record_type
);
9201 tag_kind
= union_type
;
9203 if (id
== NULL_TREE
)
9204 id
= TYPE_IDENTIFIER (old
);
9206 return xref_tag (tag_kind
, id
, globalize
, false);
9209 /* Create the binfo hierarchy for REF with (possibly NULL) base list
9210 BASE_LIST. For each element on BASE_LIST the TREE_PURPOSE is an
9211 access_* node, and the TREE_VALUE is the type of the base-class.
9212 Non-NULL TREE_TYPE indicates virtual inheritance. */
9215 xref_basetypes (tree ref
, tree base_list
)
9218 tree binfo
, base_binfo
;
9219 unsigned max_vbases
= 0; /* Maximum direct & indirect virtual bases. */
9220 unsigned max_bases
= 0; /* Maximum direct bases. */
9222 tree default_access
;
9223 tree igo_prev
; /* Track Inheritance Graph Order. */
9225 if (ref
== error_mark_node
)
9228 /* The base of a derived class is private by default, all others are
9230 default_access
= (TREE_CODE (ref
) == RECORD_TYPE
9231 && CLASSTYPE_DECLARED_CLASS (ref
)
9232 ? access_private_node
: access_public_node
);
9234 /* First, make sure that any templates in base-classes are
9235 instantiated. This ensures that if we call ourselves recursively
9236 we do not get confused about which classes are marked and which
9241 tree basetype
= TREE_VALUE (*basep
);
9243 if (!(processing_template_decl
&& uses_template_parms (basetype
))
9244 && !complete_type_or_else (basetype
, NULL
))
9245 /* An incomplete type. Remove it from the list. */
9246 *basep
= TREE_CHAIN (*basep
);
9250 if (TREE_TYPE (*basep
))
9252 if (CLASS_TYPE_P (basetype
))
9253 max_vbases
+= VEC_length (tree
, CLASSTYPE_VBASECLASSES (basetype
));
9254 basep
= &TREE_CHAIN (*basep
);
9258 TYPE_MARKED_P (ref
) = 1;
9260 /* The binfo slot should be empty, unless this is an (ill-formed)
9262 gcc_assert (!TYPE_BINFO (ref
) || TYPE_SIZE (ref
));
9263 gcc_assert (TYPE_MAIN_VARIANT (ref
) == ref
);
9265 binfo
= make_tree_binfo (max_bases
);
9267 TYPE_BINFO (ref
) = binfo
;
9268 BINFO_OFFSET (binfo
) = size_zero_node
;
9269 BINFO_TYPE (binfo
) = ref
;
9273 BINFO_BASE_ACCESSES (binfo
) = VEC_alloc (tree
, max_bases
);
9274 /* An aggregate cannot have baseclasses. */
9275 CLASSTYPE_NON_AGGREGATE (ref
) = 1;
9277 if (TREE_CODE (ref
) == UNION_TYPE
)
9278 error ("derived union `%T' invalid", ref
);
9283 if (TYPE_FOR_JAVA (ref
))
9284 error ("Java class '%T' cannot have multiple bases", ref
);
9289 CLASSTYPE_VBASECLASSES (ref
) = VEC_alloc (tree
, max_vbases
);
9291 if (TYPE_FOR_JAVA (ref
))
9292 error ("Java class '%T' cannot have virtual bases", ref
);
9295 for (igo_prev
= binfo
; base_list
; base_list
= TREE_CHAIN (base_list
))
9297 tree access
= TREE_PURPOSE (base_list
);
9298 int via_virtual
= TREE_TYPE (base_list
) != NULL_TREE
;
9299 tree basetype
= TREE_VALUE (base_list
);
9301 if (access
== access_default_node
)
9302 access
= default_access
;
9304 if (TREE_CODE (basetype
) == TYPE_DECL
)
9305 basetype
= TREE_TYPE (basetype
);
9306 if (TREE_CODE (basetype
) != RECORD_TYPE
9307 && TREE_CODE (basetype
) != TYPENAME_TYPE
9308 && TREE_CODE (basetype
) != TEMPLATE_TYPE_PARM
9309 && TREE_CODE (basetype
) != BOUND_TEMPLATE_TEMPLATE_PARM
)
9311 error ("base type `%T' fails to be a struct or class type",
9316 if (TYPE_FOR_JAVA (basetype
) && (current_lang_depth () == 0))
9317 TYPE_FOR_JAVA (ref
) = 1;
9319 base_binfo
= NULL_TREE
;
9320 if (CLASS_TYPE_P (basetype
) && !dependent_type_p (basetype
))
9322 base_binfo
= TYPE_BINFO (basetype
);
9323 /* The original basetype could have been a typedef'd type. */
9324 basetype
= BINFO_TYPE (base_binfo
);
9326 /* Inherit flags from the base. */
9327 TYPE_HAS_NEW_OPERATOR (ref
)
9328 |= TYPE_HAS_NEW_OPERATOR (basetype
);
9329 TYPE_HAS_ARRAY_NEW_OPERATOR (ref
)
9330 |= TYPE_HAS_ARRAY_NEW_OPERATOR (basetype
);
9331 TYPE_GETS_DELETE (ref
) |= TYPE_GETS_DELETE (basetype
);
9332 TYPE_HAS_CONVERSION (ref
) |= TYPE_HAS_CONVERSION (basetype
);
9333 CLASSTYPE_DIAMOND_SHAPED_P (ref
)
9334 |= CLASSTYPE_DIAMOND_SHAPED_P (basetype
);
9335 CLASSTYPE_REPEATED_BASE_P (ref
)
9336 |= CLASSTYPE_REPEATED_BASE_P (basetype
);
9339 /* We must do this test after we've seen through a typedef
9341 if (TYPE_MARKED_P (basetype
))
9343 if (basetype
== ref
)
9344 error ("recursive type `%T' undefined", basetype
);
9346 error ("duplicate base type `%T' invalid", basetype
);
9349 TYPE_MARKED_P (basetype
) = 1;
9351 base_binfo
= copy_binfo (base_binfo
, basetype
, ref
,
9352 &igo_prev
, via_virtual
);
9353 if (!BINFO_INHERITANCE_CHAIN (base_binfo
))
9354 BINFO_INHERITANCE_CHAIN (base_binfo
) = binfo
;
9356 BINFO_BASE_APPEND (binfo
, base_binfo
);
9357 BINFO_BASE_ACCESS_APPEND (binfo
, access
);
9360 if (VEC_space (tree
, CLASSTYPE_VBASECLASSES (ref
), 1))
9361 /* If we have space in the vbase vector, we must have shared at
9362 least one of them, and are therefore diamond shaped. */
9363 CLASSTYPE_DIAMOND_SHAPED_P (ref
) = 1;
9365 /* Unmark all the types. */
9366 for (i
= 0; BINFO_BASE_ITERATE (binfo
, i
, base_binfo
); i
++)
9367 TYPE_MARKED_P (BINFO_TYPE (base_binfo
)) = 0;
9368 TYPE_MARKED_P (ref
) = 0;
9370 /* Now see if we have a repeated base type. */
9371 if (!CLASSTYPE_REPEATED_BASE_P (ref
))
9373 for (base_binfo
= binfo
; base_binfo
;
9374 base_binfo
= TREE_CHAIN (base_binfo
))
9376 if (TYPE_MARKED_P (BINFO_TYPE (base_binfo
)))
9378 CLASSTYPE_REPEATED_BASE_P (ref
) = 1;
9381 TYPE_MARKED_P (BINFO_TYPE (base_binfo
)) = 1;
9383 for (base_binfo
= binfo
; base_binfo
;
9384 base_binfo
= TREE_CHAIN (base_binfo
))
9385 if (TYPE_MARKED_P (BINFO_TYPE (base_binfo
)))
9386 TYPE_MARKED_P (BINFO_TYPE (base_binfo
)) = 0;
9393 /* Begin compiling the definition of an enumeration type.
9394 NAME is its name (or null if anonymous).
9395 Returns the type object, as yet incomplete.
9396 Also records info about it so that build_enumerator
9397 may be used to declare the individual values as they are read. */
9400 start_enum (tree name
)
9402 tree enumtype
= NULL_TREE
;
9403 struct cp_binding_level
*b
= current_binding_level
;
9405 /* If this is the real definition for a previous forward reference,
9406 fill in the contents in the same object that used to be the
9407 forward reference. */
9409 if (name
!= NULL_TREE
)
9410 enumtype
= lookup_tag (ENUMERAL_TYPE
, name
, b
, 1);
9412 if (enumtype
!= NULL_TREE
&& TREE_CODE (enumtype
) == ENUMERAL_TYPE
)
9414 error ("multiple definition of `%#T'", enumtype
);
9415 error ("%Jprevious definition here", TYPE_MAIN_DECL (enumtype
));
9416 /* Clear out TYPE_VALUES, and start again. */
9417 TYPE_VALUES (enumtype
) = NULL_TREE
;
9421 enumtype
= make_node (ENUMERAL_TYPE
);
9422 pushtag (name
, enumtype
, 0);
9428 /* After processing and defining all the values of an enumeration type,
9429 install their decls in the enumeration type and finish it off.
9430 ENUMTYPE is the type object and VALUES a list of name-value pairs. */
9433 finish_enum (tree enumtype
)
9445 integer_type_kind itk
;
9446 tree underlying_type
= NULL_TREE
;
9448 /* We built up the VALUES in reverse order. */
9449 TYPE_VALUES (enumtype
) = nreverse (TYPE_VALUES (enumtype
));
9451 /* For an enum defined in a template, just set the type of the values;
9452 all further processing is postponed until the template is
9453 instantiated. We need to set the type so that tsubst of a CONST_DECL
9455 if (processing_template_decl
)
9457 for (values
= TYPE_VALUES (enumtype
);
9459 values
= TREE_CHAIN (values
))
9460 TREE_TYPE (TREE_VALUE (values
)) = enumtype
;
9461 if (at_function_scope_p ())
9462 add_stmt (build_min (TAG_DEFN
, enumtype
));
9466 /* Determine the minimum and maximum values of the enumerators. */
9467 if (TYPE_VALUES (enumtype
))
9469 minnode
= maxnode
= NULL_TREE
;
9471 for (values
= TYPE_VALUES (enumtype
);
9473 values
= TREE_CHAIN (values
))
9475 decl
= TREE_VALUE (values
);
9477 /* [dcl.enum]: Following the closing brace of an enum-specifier,
9478 each enumerator has the type of its enumeration. Prior to the
9479 closing brace, the type of each enumerator is the type of its
9480 initializing value. */
9481 TREE_TYPE (decl
) = enumtype
;
9483 /* Update the minimum and maximum values, if appropriate. */
9484 value
= DECL_INITIAL (decl
);
9485 /* Figure out what the minimum and maximum values of the
9488 minnode
= maxnode
= value
;
9489 else if (tree_int_cst_lt (maxnode
, value
))
9491 else if (tree_int_cst_lt (value
, minnode
))
9498 If the enumerator-list is empty, the underlying type is as if
9499 the enumeration had a single enumerator with value 0. */
9500 minnode
= maxnode
= integer_zero_node
;
9502 /* Compute the number of bits require to represent all values of the
9503 enumeration. We must do this before the type of MINNODE and
9504 MAXNODE are transformed, since min_precision relies on the
9505 TREE_TYPE of the value it is passed. */
9506 unsignedp
= tree_int_cst_sgn (minnode
) >= 0;
9507 lowprec
= min_precision (minnode
, unsignedp
);
9508 highprec
= min_precision (maxnode
, unsignedp
);
9509 precision
= MAX (lowprec
, highprec
);
9511 /* Determine the underlying type of the enumeration.
9515 The underlying type of an enumeration is an integral type that
9516 can represent all the enumerator values defined in the
9517 enumeration. It is implementation-defined which integral type is
9518 used as the underlying type for an enumeration except that the
9519 underlying type shall not be larger than int unless the value of
9520 an enumerator cannot fit in an int or unsigned int.
9522 We use "int" or an "unsigned int" as the underlying type, even if
9523 a smaller integral type would work, unless the user has
9524 explicitly requested that we use the smallest possible type. */
9525 for (itk
= (flag_short_enums
? itk_char
: itk_int
);
9529 underlying_type
= integer_types
[itk
];
9530 if (TYPE_PRECISION (underlying_type
) >= precision
9531 && TYPE_UNSIGNED (underlying_type
) == unsignedp
)
9534 if (itk
== itk_none
)
9538 IF no integral type can represent all the enumerator values, the
9539 enumeration is ill-formed. */
9540 error ("no integral type can represent all of the enumerator values "
9541 "for `%T'", enumtype
);
9542 precision
= TYPE_PRECISION (long_long_integer_type_node
);
9543 underlying_type
= integer_types
[itk_unsigned_long_long
];
9546 /* Compute the minium and maximum values for the type.
9550 For an enumeration where emin is the smallest enumerator and emax
9551 is the largest, the values of the enumeration are the values of the
9552 underlying type in the range bmin to bmax, where bmin and bmax are,
9553 respectively, the smallest and largest values of the smallest bit-
9554 field that can store emin and emax. */
9556 /* The middle-end currently assumes that types with TYPE_PRECISION
9557 narrower than their underlying type are suitably zero or sign
9558 extended to fill their mode. g++ doesn't make these guarantees.
9559 Until the middle-end can represent such paradoxical types, we
9560 set the TYPE_PRECISION to the width of the underlying type. */
9561 TYPE_PRECISION (enumtype
) = TYPE_PRECISION (underlying_type
);
9563 set_min_and_max_values_for_integral_type (enumtype
, precision
, unsignedp
);
9567 The value of sizeof() applied to an enumeration type, an object
9568 of an enumeration type, or an enumerator, is the value of sizeof()
9569 applied to the underlying type. */
9570 TYPE_SIZE (enumtype
) = TYPE_SIZE (underlying_type
);
9571 TYPE_SIZE_UNIT (enumtype
) = TYPE_SIZE_UNIT (underlying_type
);
9572 TYPE_MODE (enumtype
) = TYPE_MODE (underlying_type
);
9573 TYPE_ALIGN (enumtype
) = TYPE_ALIGN (underlying_type
);
9574 TYPE_USER_ALIGN (enumtype
) = TYPE_USER_ALIGN (underlying_type
);
9575 TYPE_UNSIGNED (enumtype
) = TYPE_UNSIGNED (underlying_type
);
9577 /* Convert each of the enumerators to the type of the underlying
9578 type of the enumeration. */
9579 for (values
= TYPE_VALUES (enumtype
); values
; values
= TREE_CHAIN (values
))
9581 decl
= TREE_VALUE (values
);
9582 value
= perform_implicit_conversion (underlying_type
,
9583 DECL_INITIAL (decl
));
9585 /* Do not clobber shared ints. */
9586 value
= copy_node (value
);
9588 TREE_TYPE (value
) = enumtype
;
9589 DECL_INITIAL (decl
) = value
;
9590 TREE_VALUE (values
) = value
;
9593 /* Fix up all variant types of this enum type. */
9594 for (t
= TYPE_MAIN_VARIANT (enumtype
); t
; t
= TYPE_NEXT_VARIANT (t
))
9596 TYPE_VALUES (t
) = TYPE_VALUES (enumtype
);
9597 TYPE_MIN_VALUE (t
) = TYPE_MIN_VALUE (enumtype
);
9598 TYPE_MAX_VALUE (t
) = TYPE_MAX_VALUE (enumtype
);
9599 TYPE_SIZE (t
) = TYPE_SIZE (enumtype
);
9600 TYPE_SIZE_UNIT (t
) = TYPE_SIZE_UNIT (enumtype
);
9601 TYPE_MODE (t
) = TYPE_MODE (enumtype
);
9602 TYPE_PRECISION (t
) = TYPE_PRECISION (enumtype
);
9603 TYPE_ALIGN (t
) = TYPE_ALIGN (enumtype
);
9604 TYPE_USER_ALIGN (t
) = TYPE_USER_ALIGN (enumtype
);
9605 TYPE_UNSIGNED (t
) = TYPE_UNSIGNED (enumtype
);
9608 /* Finish debugging output for this type. */
9609 rest_of_type_compilation (enumtype
, namespace_bindings_p ());
9612 /* Build and install a CONST_DECL for an enumeration constant of the
9613 enumeration type ENUMTYPE whose NAME and VALUE (if any) are provided.
9614 Assignment of sequential values by default is handled here. */
9617 build_enumerator (tree name
, tree value
, tree enumtype
)
9623 /* Remove no-op casts from the value. */
9625 STRIP_TYPE_NOPS (value
);
9627 if (! processing_template_decl
)
9629 /* Validate and default VALUE. */
9630 if (value
!= NULL_TREE
)
9632 value
= decl_constant_value (value
);
9634 if (TREE_CODE (value
) == INTEGER_CST
)
9636 value
= perform_integral_promotions (value
);
9637 constant_expression_warning (value
);
9641 error ("enumerator value for `%D' not integer constant", name
);
9646 /* Default based on previous value. */
9647 if (value
== NULL_TREE
)
9649 if (TYPE_VALUES (enumtype
))
9652 unsigned HOST_WIDE_INT lo
;
9656 /* The next value is the previous value plus one. We can
9657 safely assume that the previous value is an INTEGER_CST.
9658 add_double doesn't know the type of the target expression,
9659 so we must check with int_fits_type_p as well. */
9660 prev_value
= DECL_INITIAL (TREE_VALUE (TYPE_VALUES (enumtype
)));
9661 overflowed
= add_double (TREE_INT_CST_LOW (prev_value
),
9662 TREE_INT_CST_HIGH (prev_value
),
9664 value
= build_int_cst_wide (TREE_TYPE (prev_value
), lo
, hi
);
9665 overflowed
|= !int_fits_type_p (value
, TREE_TYPE (prev_value
));
9668 error ("overflow in enumeration values at `%D'", name
);
9671 value
= integer_zero_node
;
9674 /* Remove no-op casts from the value. */
9675 STRIP_TYPE_NOPS (value
);
9678 /* C++ associates enums with global, function, or class declarations. */
9679 context
= current_scope ();
9681 context
= current_namespace
;
9683 /* Build the actual enumeration constant. Note that the enumeration
9684 constants have the type of their initializers until the
9685 enumeration is complete:
9689 Following the closing brace of an enum-specifier, each enumer-
9690 ator has the type of its enumeration. Prior to the closing
9691 brace, the type of each enumerator is the type of its
9694 In finish_enum we will reset the type. Of course, if we're
9695 processing a template, there may be no value. */
9696 type
= value
? TREE_TYPE (value
) : NULL_TREE
;
9698 if (context
&& context
== current_class_type
)
9699 /* This enum declaration is local to the class. We need the full
9700 lang_decl so that we can record DECL_CLASS_CONTEXT, for example. */
9701 decl
= build_lang_decl (CONST_DECL
, name
, type
);
9703 /* It's a global enum, or it's local to a function. (Note local to
9704 a function could mean local to a class method. */
9705 decl
= build_decl (CONST_DECL
, name
, type
);
9707 DECL_CONTEXT (decl
) = FROB_CONTEXT (context
);
9708 TREE_CONSTANT (decl
) = 1;
9709 TREE_INVARIANT (decl
) = 1;
9710 TREE_READONLY (decl
) = 1;
9711 DECL_INITIAL (decl
) = value
;
9713 if (context
&& context
== current_class_type
)
9714 /* In something like `struct S { enum E { i = 7 }; };' we put `i'
9715 on the TYPE_FIELDS list for `S'. (That's so that you can say
9716 things like `S::i' later.) */
9717 finish_member_declaration (decl
);
9721 /* Add this enumeration constant to the list for this type. */
9722 TYPE_VALUES (enumtype
) = tree_cons (name
, decl
, TYPE_VALUES (enumtype
));
9726 /* We're defining DECL. Make sure that it's type is OK. */
9729 check_function_type (tree decl
, tree current_function_parms
)
9731 tree fntype
= TREE_TYPE (decl
);
9732 tree return_type
= complete_type (TREE_TYPE (fntype
));
9734 /* In a function definition, arg types must be complete. */
9735 require_complete_types_for_parms (current_function_parms
);
9737 if (!COMPLETE_OR_VOID_TYPE_P (return_type
))
9739 error ("return type `%#T' is incomplete", TREE_TYPE (fntype
));
9741 /* Make it return void instead, but don't change the
9742 type of the DECL_RESULT, in case we have a named return value. */
9743 if (TREE_CODE (fntype
) == METHOD_TYPE
)
9745 tree ctype
= TREE_TYPE (TREE_VALUE (TYPE_ARG_TYPES (fntype
)));
9747 = build_method_type_directly (ctype
,
9749 FUNCTION_ARG_CHAIN (decl
));
9753 = build_function_type (void_type_node
,
9754 TYPE_ARG_TYPES (TREE_TYPE (decl
)));
9756 = build_exception_variant (fntype
,
9757 TYPE_RAISES_EXCEPTIONS (fntype
));
9760 abstract_virtuals_error (decl
, TREE_TYPE (fntype
));
9763 /* Create the FUNCTION_DECL for a function definition.
9764 DECLSPECS and DECLARATOR are the parts of the declaration;
9765 they describe the function's name and the type it returns,
9766 but twisted together in a fashion that parallels the syntax of C.
9768 FLAGS is a bitwise or of SF_PRE_PARSED (indicating that the
9769 DECLARATOR is really the DECL for the function we are about to
9770 process and that DECLSPECS should be ignored), SF_INCLASS_INLINE
9771 indicating that the function is an inline defined in-class.
9773 This function creates a binding context for the function body
9774 as well as setting up the FUNCTION_DECL in current_function_decl.
9776 For C++, we must first check whether that datum makes any sense.
9777 For example, "class A local_a(1,2);" means that variable local_a
9778 is an aggregate of type A, which should have a constructor
9779 applied to it with the argument list [1, 2]. */
9782 start_preparsed_function (tree decl1
, tree attrs
, int flags
)
9784 tree ctype
= NULL_TREE
;
9787 int doing_friend
= 0;
9788 struct cp_binding_level
*bl
;
9789 tree current_function_parms
;
9790 struct c_fileinfo
*finfo
= get_fileinfo (lbasename (input_filename
));
9793 gcc_assert (TREE_CODE (TREE_VALUE (void_list_node
)) == VOID_TYPE
);
9794 gcc_assert (TREE_CHAIN (void_list_node
) == NULL_TREE
);
9796 fntype
= TREE_TYPE (decl1
);
9797 if (TREE_CODE (fntype
) == METHOD_TYPE
)
9798 ctype
= TYPE_METHOD_BASETYPE (fntype
);
9800 /* ISO C++ 11.4/5. A friend function defined in a class is in
9801 the (lexical) scope of the class in which it is defined. */
9802 if (!ctype
&& DECL_FRIEND_P (decl1
))
9804 ctype
= DECL_FRIEND_CONTEXT (decl1
);
9806 /* CTYPE could be null here if we're dealing with a template;
9807 for example, `inline friend float foo()' inside a template
9808 will have no CTYPE set. */
9809 if (ctype
&& TREE_CODE (ctype
) != RECORD_TYPE
)
9815 if (DECL_DECLARED_INLINE_P (decl1
)
9816 && lookup_attribute ("noinline", attrs
))
9817 warning ("%Jinline function '%D' given attribute noinline", decl1
, decl1
);
9819 if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (decl1
))
9820 /* This is a constructor, we must ensure that any default args
9821 introduced by this definition are propagated to the clones
9822 now. The clones are used directly in overload resolution. */
9823 adjust_clone_args (decl1
);
9825 /* Sometimes we don't notice that a function is a static member, and
9826 build a METHOD_TYPE for it. Fix that up now. */
9827 if (ctype
!= NULL_TREE
&& DECL_STATIC_FUNCTION_P (decl1
)
9828 && TREE_CODE (TREE_TYPE (decl1
)) == METHOD_TYPE
)
9830 revert_static_member_fn (decl1
);
9834 /* Set up current_class_type, and enter the scope of the class, if
9837 push_nested_class (ctype
);
9838 else if (DECL_STATIC_FUNCTION_P (decl1
))
9839 push_nested_class (DECL_CONTEXT (decl1
));
9841 /* Now that we have entered the scope of the class, we must restore
9842 the bindings for any template parameters surrounding DECL1, if it
9843 is an inline member template. (Order is important; consider the
9844 case where a template parameter has the same name as a field of
9845 the class.) It is not until after this point that
9846 PROCESSING_TEMPLATE_DECL is guaranteed to be set up correctly. */
9847 if (flags
& SF_INCLASS_INLINE
)
9848 maybe_begin_member_template_processing (decl1
);
9850 /* Effective C++ rule 15. */
9852 && DECL_OVERLOADED_OPERATOR_P (decl1
) == NOP_EXPR
9853 && TREE_CODE (TREE_TYPE (fntype
)) == VOID_TYPE
)
9854 warning ("`operator=' should return a reference to `*this'");
9856 /* Make the init_value nonzero so pushdecl knows this is not tentative.
9857 error_mark_node is replaced below (in poplevel) with the BLOCK. */
9858 if (!DECL_INITIAL (decl1
))
9859 DECL_INITIAL (decl1
) = error_mark_node
;
9861 /* This function exists in static storage.
9862 (This does not mean `static' in the C sense!) */
9863 TREE_STATIC (decl1
) = 1;
9865 /* We must call push_template_decl after current_class_type is set
9866 up. (If we are processing inline definitions after exiting a
9867 class scope, current_class_type will be NULL_TREE until set above
9868 by push_nested_class.) */
9869 if (processing_template_decl
)
9870 decl1
= push_template_decl (decl1
);
9872 /* We are now in the scope of the function being defined. */
9873 current_function_decl
= decl1
;
9875 /* Save the parm names or decls from this function's declarator
9876 where store_parm_decls will find them. */
9877 current_function_parms
= DECL_ARGUMENTS (decl1
);
9879 /* Make sure the parameter and return types are reasonable. When
9880 you declare a function, these types can be incomplete, but they
9881 must be complete when you define the function. */
9882 if (! processing_template_decl
)
9883 check_function_type (decl1
, current_function_parms
);
9885 /* Build the return declaration for the function. */
9886 restype
= TREE_TYPE (fntype
);
9887 /* Promote the value to int before returning it. */
9888 if (c_promoting_integer_type_p (restype
))
9889 restype
= type_promotes_to (restype
);
9890 if (DECL_RESULT (decl1
) == NULL_TREE
)
9894 resdecl
= build_decl (RESULT_DECL
, 0, TYPE_MAIN_VARIANT (restype
));
9895 DECL_ARTIFICIAL (resdecl
) = 1;
9896 DECL_IGNORED_P (resdecl
) = 1;
9897 DECL_RESULT (decl1
) = resdecl
;
9899 c_apply_type_quals_to_decl (cp_type_quals (restype
), resdecl
);
9902 /* Initialize RTL machinery. We cannot do this until
9903 CURRENT_FUNCTION_DECL and DECL_RESULT are set up. We do this
9904 even when processing a template; this is how we get
9905 CFUN set up, and our per-function variables initialized.
9906 FIXME factor out the non-RTL stuff. */
9907 bl
= current_binding_level
;
9908 allocate_struct_function (decl1
);
9909 current_binding_level
= bl
;
9911 /* Even though we're inside a function body, we still don't want to
9912 call expand_expr to calculate the size of a variable-sized array.
9913 We haven't necessarily assigned RTL to all variables yet, so it's
9914 not safe to try to expand expressions involving them. */
9915 cfun
->x_dont_save_pending_sizes_p
= 1;
9917 /* Start the statement-tree, start the tree now. */
9918 DECL_SAVED_TREE (decl1
) = push_stmt_list ();
9920 /* Let the user know we're compiling this function. */
9921 announce_function (decl1
);
9923 /* Record the decl so that the function name is defined.
9924 If we already have a decl for this name, and it is a FUNCTION_DECL,
9925 use the old decl. */
9926 if (!processing_template_decl
&& !(flags
& SF_PRE_PARSED
))
9928 /* A specialization is not used to guide overload resolution. */
9929 if (!DECL_FUNCTION_MEMBER_P (decl1
)
9930 && !(DECL_USE_TEMPLATE (decl1
) &&
9931 PRIMARY_TEMPLATE_P (DECL_TI_TEMPLATE (decl1
))))
9933 tree olddecl
= pushdecl (decl1
);
9935 if (olddecl
== error_mark_node
)
9936 /* If something went wrong when registering the declaration,
9937 use DECL1; we have to have a FUNCTION_DECL to use when
9938 parsing the body of the function. */
9941 /* Otherwise, OLDDECL is either a previous declaration of
9942 the same function or DECL1 itself. */
9947 /* We need to set the DECL_CONTEXT. */
9948 if (!DECL_CONTEXT (decl1
) && DECL_TEMPLATE_INFO (decl1
))
9949 DECL_CONTEXT (decl1
) = DECL_CONTEXT (DECL_TI_TEMPLATE (decl1
));
9950 /* And make sure we have enough default args. */
9951 check_default_args (decl1
);
9953 fntype
= TREE_TYPE (decl1
);
9956 /* Determine the ELF visibility attribute for the function. We must
9957 not do this before calling "pushdecl", as we must allow
9958 "duplicate_decls" to merge any attributes appropriately. */
9959 if (!DECL_CLONED_FUNCTION_P (decl1
))
9960 determine_visibility (decl1
);
9962 /* Reset these in case the call to pushdecl changed them. */
9963 current_function_decl
= decl1
;
9966 /* If we are (erroneously) defining a function that we have already
9967 defined before, wipe out what we knew before. */
9968 if (!DECL_PENDING_INLINE_P (decl1
))
9969 DECL_SAVED_FUNCTION_DATA (decl1
) = NULL
;
9971 if (ctype
&& !doing_friend
&& !DECL_STATIC_FUNCTION_P (decl1
))
9973 /* We know that this was set up by `grokclassfn'. We do not
9974 wait until `store_parm_decls', since evil parse errors may
9975 never get us to that point. Here we keep the consistency
9976 between `current_class_type' and `current_class_ptr'. */
9977 tree t
= DECL_ARGUMENTS (decl1
);
9979 gcc_assert (t
!= NULL_TREE
&& TREE_CODE (t
) == PARM_DECL
);
9980 gcc_assert (TREE_CODE (TREE_TYPE (t
)) == POINTER_TYPE
);
9982 cp_function_chain
->x_current_class_ref
9983 = build_indirect_ref (t
, NULL
);
9984 cp_function_chain
->x_current_class_ptr
= t
;
9986 /* Constructors and destructors need to know whether they're "in
9987 charge" of initializing virtual base classes. */
9989 if (DECL_HAS_IN_CHARGE_PARM_P (decl1
))
9991 current_in_charge_parm
= t
;
9994 if (DECL_HAS_VTT_PARM_P (decl1
))
9996 gcc_assert (DECL_NAME (t
) == vtt_parm_identifier
);
9997 current_vtt_parm
= t
;
10001 if (DECL_INTERFACE_KNOWN (decl1
))
10003 tree ctx
= decl_function_context (decl1
);
10005 if (DECL_NOT_REALLY_EXTERN (decl1
))
10006 DECL_EXTERNAL (decl1
) = 0;
10008 if (ctx
!= NULL_TREE
&& DECL_DECLARED_INLINE_P (ctx
)
10009 && TREE_PUBLIC (ctx
))
10010 /* This is a function in a local class in an extern inline
10012 comdat_linkage (decl1
);
10014 /* If this function belongs to an interface, it is public.
10015 If it belongs to someone else's interface, it is also external.
10016 This only affects inlines and template instantiations. */
10017 else if (finfo
->interface_unknown
== 0
10018 && ! DECL_TEMPLATE_INSTANTIATION (decl1
))
10020 if (DECL_DECLARED_INLINE_P (decl1
)
10021 || DECL_TEMPLATE_INSTANTIATION (decl1
)
10022 || processing_template_decl
)
10024 DECL_EXTERNAL (decl1
)
10025 = (finfo
->interface_only
10026 || (DECL_DECLARED_INLINE_P (decl1
)
10027 && ! flag_implement_inlines
10028 && !DECL_VINDEX (decl1
)));
10030 /* For WIN32 we also want to put these in linkonce sections. */
10031 maybe_make_one_only (decl1
);
10034 DECL_EXTERNAL (decl1
) = 0;
10035 DECL_NOT_REALLY_EXTERN (decl1
) = 0;
10036 DECL_INTERFACE_KNOWN (decl1
) = 1;
10037 /* If this function is in an interface implemented in this file,
10038 make sure that the backend knows to emit this function
10040 if (!DECL_EXTERNAL (decl1
))
10041 mark_needed (decl1
);
10043 else if (finfo
->interface_unknown
&& finfo
->interface_only
10044 && ! DECL_TEMPLATE_INSTANTIATION (decl1
))
10046 /* If MULTIPLE_SYMBOL_SPACES is defined and we saw a #pragma
10047 interface, we will have both finfo->interface_unknown and
10048 finfo->interface_only set. In that case, we don't want to
10049 use the normal heuristics because someone will supply a
10050 #pragma implementation elsewhere, and deducing it here would
10051 produce a conflict. */
10052 comdat_linkage (decl1
);
10053 DECL_EXTERNAL (decl1
) = 0;
10054 DECL_INTERFACE_KNOWN (decl1
) = 1;
10055 DECL_DEFER_OUTPUT (decl1
) = 1;
10059 /* This is a definition, not a reference.
10060 So clear DECL_EXTERNAL. */
10061 DECL_EXTERNAL (decl1
) = 0;
10063 if ((DECL_DECLARED_INLINE_P (decl1
)
10064 || DECL_TEMPLATE_INSTANTIATION (decl1
))
10065 && ! DECL_INTERFACE_KNOWN (decl1
)
10066 /* Don't try to defer nested functions for now. */
10067 && ! decl_function_context (decl1
))
10068 DECL_DEFER_OUTPUT (decl1
) = 1;
10070 DECL_INTERFACE_KNOWN (decl1
) = 1;
10073 begin_scope (sk_function_parms
, decl1
);
10077 if (DECL_DESTRUCTOR_P (decl1
)
10078 || (DECL_CONSTRUCTOR_P (decl1
)
10079 && targetm
.cxx
.cdtor_returns_this ()))
10081 cdtor_label
= build_decl (LABEL_DECL
, NULL_TREE
, NULL_TREE
);
10082 DECL_CONTEXT (cdtor_label
) = current_function_decl
;
10085 start_fname_decls ();
10087 store_parm_decls (current_function_parms
);
10091 /* Like start_preparsed_function, except that instead of a
10092 FUNCTION_DECL, this function takes DECLSPECS and DECLARATOR.
10094 Returns 1 on success. If the DECLARATOR is not suitable for a function
10095 (it defines a datum instead), we return 0, which tells
10096 yyparse to report a parse error. */
10099 start_function (cp_decl_specifier_seq
*declspecs
,
10100 const cp_declarator
*declarator
,
10105 if (have_extern_spec
)
10107 declspecs
->storage_class
= sc_extern
;
10108 /* This should only be done once on the outermost decl. */
10109 have_extern_spec
= false;
10112 decl1
= grokdeclarator (declarator
, declspecs
, FUNCDEF
, 1, &attrs
);
10113 /* If the declarator is not suitable for a function definition,
10114 cause a syntax error. */
10115 if (decl1
== NULL_TREE
|| TREE_CODE (decl1
) != FUNCTION_DECL
)
10118 /* If #pragma weak was used, mark the decl weak now. */
10119 if (global_scope_p (current_binding_level
))
10120 maybe_apply_pragma_weak (decl1
);
10122 if (DECL_MAIN_P (decl1
))
10123 /* main must return int. grokfndecl should have corrected it
10124 (and issued a diagnostic) if the user got it wrong. */
10125 gcc_assert (same_type_p (TREE_TYPE (TREE_TYPE (decl1
)),
10126 integer_type_node
));
10128 start_preparsed_function (decl1
, attrs
, /*flags=*/SF_DEFAULT
);
10133 /* Store the parameter declarations into the current function declaration.
10134 This is called after parsing the parameter declarations, before
10135 digesting the body of the function.
10137 Also install to binding contour return value identifier, if any. */
10140 store_parm_decls (tree current_function_parms
)
10142 tree fndecl
= current_function_decl
;
10145 /* This is a chain of any other decls that came in among the parm
10146 declarations. If a parm is declared with enum {foo, bar} x;
10147 then CONST_DECLs for foo and bar are put here. */
10148 tree nonparms
= NULL_TREE
;
10150 if (current_function_parms
)
10152 /* This case is when the function was defined with an ANSI prototype.
10153 The parms already have decls, so we need not do anything here
10154 except record them as in effect
10155 and complain if any redundant old-style parm decls were written. */
10157 tree specparms
= current_function_parms
;
10160 /* Must clear this because it might contain TYPE_DECLs declared
10162 current_binding_level
->names
= NULL
;
10164 /* If we're doing semantic analysis, then we'll call pushdecl
10165 for each of these. We must do them in reverse order so that
10166 they end in the correct forward order. */
10167 specparms
= nreverse (specparms
);
10169 for (parm
= specparms
; parm
; parm
= next
)
10171 next
= TREE_CHAIN (parm
);
10172 if (TREE_CODE (parm
) == PARM_DECL
)
10174 if (DECL_NAME (parm
) == NULL_TREE
10175 || TREE_CODE (parm
) != VOID_TYPE
)
10178 error ("parameter `%D' declared void", parm
);
10182 /* If we find an enum constant or a type tag,
10183 put it aside for the moment. */
10184 TREE_CHAIN (parm
) = NULL_TREE
;
10185 nonparms
= chainon (nonparms
, parm
);
10189 /* Get the decls in their original chain order and record in the
10190 function. This is all and only the PARM_DECLs that were
10191 pushed into scope by the loop above. */
10192 DECL_ARGUMENTS (fndecl
) = getdecls ();
10195 DECL_ARGUMENTS (fndecl
) = NULL_TREE
;
10197 /* Now store the final chain of decls for the arguments
10198 as the decl-chain of the current lexical scope.
10199 Put the enumerators in as well, at the front so that
10200 DECL_ARGUMENTS is not modified. */
10201 current_binding_level
->names
= chainon (nonparms
, DECL_ARGUMENTS (fndecl
));
10203 /* For a cloned function, we've already got all the code we need;
10204 there's no need to add any extra bits. */
10205 if (!DECL_CLONED_FUNCTION_P (fndecl
))
10207 /* Do the starting of the exception specifications, if we have any. */
10208 if (flag_exceptions
&& !processing_template_decl
10209 && flag_enforce_eh_specs
10210 && TYPE_RAISES_EXCEPTIONS (TREE_TYPE (current_function_decl
)))
10211 current_eh_spec_block
= begin_eh_spec_block ();
10216 /* We have finished doing semantic analysis on DECL, but have not yet
10217 generated RTL for its body. Save away our current state, so that
10218 when we want to generate RTL later we know what to do. */
10221 save_function_data (tree decl
)
10223 struct language_function
*f
;
10225 /* Save the language-specific per-function data so that we can
10226 get it back when we really expand this function. */
10227 gcc_assert (!DECL_PENDING_INLINE_P (decl
));
10230 f
= GGC_NEW (struct language_function
);
10231 memcpy (f
, cp_function_chain
, sizeof (struct language_function
));
10232 DECL_SAVED_FUNCTION_DATA (decl
) = f
;
10234 /* Clear out the bits we don't need. */
10235 f
->base
.x_stmt_tree
.x_cur_stmt_list
= NULL_TREE
;
10236 f
->x_named_label_uses
= NULL
;
10237 f
->bindings
= NULL
;
10238 f
->x_local_names
= NULL
;
10242 /* Set the return value of the constructor (if present). */
10245 finish_constructor_body (void)
10250 if (targetm
.cxx
.cdtor_returns_this ())
10252 /* Any return from a constructor will end up here. */
10253 add_stmt (build_stmt (LABEL_EXPR
, cdtor_label
));
10255 val
= DECL_ARGUMENTS (current_function_decl
);
10256 val
= build2 (MODIFY_EXPR
, TREE_TYPE (val
),
10257 DECL_RESULT (current_function_decl
), val
);
10258 /* Return the address of the object. */
10259 exprstmt
= build_stmt (RETURN_EXPR
, val
);
10260 add_stmt (exprstmt
);
10264 /* Do all the processing for the beginning of a destructor; set up the
10265 vtable pointers and cleanups for bases and members. */
10268 begin_destructor_body (void)
10271 tree compound_stmt
;
10273 /* If the dtor is empty, and we know there is not any possible
10274 way we could use any vtable entries, before they are possibly
10275 set by a base class dtor, we don't have to setup the vtables,
10276 as we know that any base class dtor will set up any vtables
10277 it needs. We avoid MI, because one base class dtor can do a
10278 virtual dispatch to an overridden function that would need to
10279 have a non-related vtable set up, we cannot avoid setting up
10280 vtables in that case. We could change this to see if there
10281 is just one vtable.
10283 ??? In the destructor for a class, the vtables are set
10284 appropriately for that class. There will be no non-related
10285 vtables. jason 2001-12-11. */
10286 if_stmt
= begin_if_stmt ();
10288 /* If it is not safe to avoid setting up the vtables, then
10289 someone will change the condition to be boolean_true_node.
10290 (Actually, for now, we do not have code to set the condition
10291 appropriately, so we just assume that we always need to
10292 initialize the vtables.) */
10293 finish_if_stmt_cond (boolean_true_node
, if_stmt
);
10295 compound_stmt
= begin_compound_stmt (0);
10297 /* Make all virtual function table pointers in non-virtual base
10298 classes point to CURRENT_CLASS_TYPE's virtual function
10300 initialize_vtbl_ptrs (current_class_ptr
);
10302 finish_compound_stmt (compound_stmt
);
10303 finish_then_clause (if_stmt
);
10304 finish_if_stmt (if_stmt
);
10306 /* And insert cleanups for our bases and members so that they
10307 will be properly destroyed if we throw. */
10308 push_base_cleanups ();
10311 /* At the end of every destructor we generate code to delete the object if
10312 necessary. Do that now. */
10315 finish_destructor_body (void)
10319 /* Any return from a destructor will end up here; that way all base
10320 and member cleanups will be run when the function returns. */
10321 add_stmt (build_stmt (LABEL_EXPR
, cdtor_label
));
10323 /* In a virtual destructor, we must call delete. */
10324 if (DECL_VIRTUAL_P (current_function_decl
))
10327 tree virtual_size
= cxx_sizeof (current_class_type
);
10331 At the point of definition of a virtual destructor (including
10332 an implicit definition), non-placement operator delete shall
10333 be looked up in the scope of the destructor's class and if
10334 found shall be accessible and unambiguous. */
10335 exprstmt
= build_op_delete_call
10336 (DELETE_EXPR
, current_class_ptr
, virtual_size
,
10337 /*global_p=*/false, NULL_TREE
);
10339 if_stmt
= begin_if_stmt ();
10340 finish_if_stmt_cond (build2 (BIT_AND_EXPR
, integer_type_node
,
10341 current_in_charge_parm
,
10344 finish_expr_stmt (exprstmt
);
10345 finish_then_clause (if_stmt
);
10346 finish_if_stmt (if_stmt
);
10349 if (targetm
.cxx
.cdtor_returns_this ())
10353 val
= DECL_ARGUMENTS (current_function_decl
);
10354 val
= build2 (MODIFY_EXPR
, TREE_TYPE (val
),
10355 DECL_RESULT (current_function_decl
), val
);
10356 /* Return the address of the object. */
10357 exprstmt
= build_stmt (RETURN_EXPR
, val
);
10358 add_stmt (exprstmt
);
10362 /* Do the necessary processing for the beginning of a function body, which
10363 in this case includes member-initializers, but not the catch clauses of
10364 a function-try-block. Currently, this means opening a binding level
10365 for the member-initializers (in a ctor) and member cleanups (in a dtor).
10366 In other functions, this isn't necessary, but it doesn't hurt. */
10369 begin_function_body (void)
10373 if (processing_template_decl
)
10374 /* Do nothing now. */;
10376 /* Always keep the BLOCK node associated with the outermost pair of
10377 curly braces of a function. These are needed for correct
10378 operation of dwarfout.c. */
10379 keep_next_level (true);
10381 stmt
= begin_compound_stmt (BCS_FN_BODY
);
10383 if (processing_template_decl
)
10384 /* Do nothing now. */;
10385 else if (DECL_DESTRUCTOR_P (current_function_decl
))
10386 begin_destructor_body ();
10391 /* Do the processing for the end of a function body. Currently, this means
10392 closing out the cleanups for fully-constructed bases and members, and in
10393 the case of the destructor, deleting the object if desired. Again, this
10394 is only meaningful for [cd]tors, since they are the only functions where
10395 there is a significant distinction between the main body and any
10396 function catch clauses. Handling, say, main() return semantics here
10397 would be wrong, as flowing off the end of a function catch clause for
10398 main() would also need to return 0. */
10401 finish_function_body (tree compstmt
)
10403 /* Close the block. */
10404 finish_compound_stmt (compstmt
);
10406 if (processing_template_decl
)
10407 /* Do nothing now. */;
10408 else if (DECL_CONSTRUCTOR_P (current_function_decl
))
10409 finish_constructor_body ();
10410 else if (DECL_DESTRUCTOR_P (current_function_decl
))
10411 finish_destructor_body ();
10414 /* Finish up a function declaration and compile that function
10415 all the way to assembler language output. The free the storage
10416 for the function definition.
10418 FLAGS is a bitwise or of the following values:
10420 We just finished processing the body of an in-class inline
10421 function definition. (This processing will have taken place
10422 after the class definition is complete.) */
10425 finish_function (int flags
)
10427 tree fndecl
= current_function_decl
;
10428 tree fntype
, ctype
= NULL_TREE
;
10429 int inclass_inline
= (flags
& 2) != 0;
10432 /* When we get some parse errors, we can end up without a
10433 current_function_decl, so cope. */
10434 if (fndecl
== NULL_TREE
)
10435 return error_mark_node
;
10437 if (DECL_NONSTATIC_MEMBER_FUNCTION_P (fndecl
)
10438 && DECL_VIRTUAL_P (fndecl
)
10439 && !processing_template_decl
)
10441 tree fnclass
= DECL_CONTEXT (fndecl
);
10442 if (fndecl
== CLASSTYPE_KEY_METHOD (fnclass
))
10443 keyed_classes
= tree_cons (NULL_TREE
, fnclass
, keyed_classes
);
10446 nested
= function_depth
> 1;
10447 fntype
= TREE_TYPE (fndecl
);
10449 /* TREE_READONLY (fndecl) = 1;
10450 This caused &foo to be of type ptr-to-const-function
10451 which then got a warning when stored in a ptr-to-function variable. */
10453 gcc_assert (building_stmt_tree ());
10455 /* For a cloned function, we've already got all the code we need;
10456 there's no need to add any extra bits. */
10457 if (!DECL_CLONED_FUNCTION_P (fndecl
))
10459 if (DECL_MAIN_P (current_function_decl
))
10461 /* Make it so that `main' always returns 0 by default. */
10463 finish_return_stmt (integer_one_node
);
10465 finish_return_stmt (integer_zero_node
);
10469 /* Finish dealing with exception specifiers. */
10470 if (flag_exceptions
&& !processing_template_decl
10471 && flag_enforce_eh_specs
10472 && TYPE_RAISES_EXCEPTIONS (TREE_TYPE (current_function_decl
)))
10473 finish_eh_spec_block (TYPE_RAISES_EXCEPTIONS
10474 (TREE_TYPE (current_function_decl
)),
10475 current_eh_spec_block
);
10478 /* If we're saving up tree structure, tie off the function now. */
10479 DECL_SAVED_TREE (fndecl
) = pop_stmt_list (DECL_SAVED_TREE (fndecl
));
10481 finish_fname_decls ();
10483 /* If this function can't throw any exceptions, remember that. */
10484 if (!processing_template_decl
10485 && !cp_function_chain
->can_throw
10486 && !flag_non_call_exceptions
)
10487 TREE_NOTHROW (fndecl
) = 1;
10489 /* This must come after expand_function_end because cleanups might
10490 have declarations (from inline functions) that need to go into
10491 this function's blocks. */
10493 /* If the current binding level isn't the outermost binding level
10494 for this function, either there is a bug, or we have experienced
10495 syntax errors and the statement tree is malformed. */
10496 if (current_binding_level
->kind
!= sk_function_parms
)
10498 /* Make sure we have already experienced errors. */
10499 gcc_assert (errorcount
);
10501 /* Throw away the broken statement tree and extra binding
10503 DECL_SAVED_TREE (fndecl
) = alloc_stmt_list ();
10505 while (current_binding_level
->kind
!= sk_function_parms
)
10507 if (current_binding_level
->kind
== sk_class
)
10508 pop_nested_class ();
10510 poplevel (0, 0, 0);
10513 poplevel (1, 0, 1);
10515 /* Statements should always be full-expressions at the outermost set
10516 of curly braces for a function. */
10517 gcc_assert (stmts_are_full_exprs_p ());
10519 /* Set up the named return value optimization, if we can. Candidate
10520 variables are selected in check_return_value. */
10521 if (current_function_return_value
)
10523 tree r
= current_function_return_value
;
10526 if (r
!= error_mark_node
10527 /* This is only worth doing for fns that return in memory--and
10528 simpler, since we don't have to worry about promoted modes. */
10529 && aggregate_value_p (TREE_TYPE (TREE_TYPE (fndecl
)), fndecl
)
10530 /* Only allow this for variables declared in the outer scope of
10531 the function so we know that their lifetime always ends with a
10532 return; see g++.dg/opt/nrv6.C. We could be more flexible if
10533 we were to do this optimization in tree-ssa. */
10534 && (outer
= BLOCK_SUBBLOCKS (DECL_INITIAL (fndecl
)))
10535 /* Skip the artificial function body block. */
10536 && (outer
= BLOCK_SUBBLOCKS (outer
))
10537 && chain_member (r
, BLOCK_VARS (outer
)))
10538 finalize_nrv (&DECL_SAVED_TREE (fndecl
), r
, DECL_RESULT (fndecl
));
10540 current_function_return_value
= NULL_TREE
;
10543 /* Remember that we were in class scope. */
10544 if (current_class_name
)
10545 ctype
= current_class_type
;
10547 /* Must mark the RESULT_DECL as being in this function. */
10548 DECL_CONTEXT (DECL_RESULT (fndecl
)) = fndecl
;
10550 /* Set the BLOCK_SUPERCONTEXT of the outermost function scope to point
10551 to the FUNCTION_DECL node itself. */
10552 BLOCK_SUPERCONTEXT (DECL_INITIAL (fndecl
)) = fndecl
;
10554 /* Save away current state, if appropriate. */
10555 if (!processing_template_decl
)
10556 save_function_data (fndecl
);
10558 /* Complain if there's just no return statement. */
10559 if (warn_return_type
10560 && TREE_CODE (TREE_TYPE (fntype
)) != VOID_TYPE
10561 && !dependent_type_p (TREE_TYPE (fntype
))
10562 && !current_function_returns_value
&& !current_function_returns_null
10563 /* Don't complain if we abort or throw. */
10564 && !current_function_returns_abnormally
10565 && !DECL_NAME (DECL_RESULT (fndecl
))
10566 /* Normally, with -Wreturn-type, flow will complain. Unless we're an
10567 inline function, as we might never be compiled separately. */
10568 && (DECL_INLINE (fndecl
) || processing_template_decl
)
10569 /* Structor return values (if any) are set by the compiler. */
10570 && !DECL_CONSTRUCTOR_P (fndecl
)
10571 && !DECL_DESTRUCTOR_P (fndecl
))
10572 warning ("no return statement in function returning non-void");
10574 /* Store the end of the function, so that we get good line number
10575 info for the epilogue. */
10576 cfun
->function_end_locus
= input_location
;
10578 /* Genericize before inlining. */
10579 if (!processing_template_decl
)
10581 struct language_function
*f
= DECL_SAVED_FUNCTION_DATA (fndecl
);
10582 cp_genericize (fndecl
);
10583 /* Clear out the bits we don't need. */
10584 f
->x_current_class_ptr
= NULL
;
10585 f
->x_current_class_ref
= NULL
;
10586 f
->x_eh_spec_block
= NULL
;
10587 f
->x_in_charge_parm
= NULL
;
10588 f
->x_vtt_parm
= NULL
;
10589 f
->x_return_value
= NULL
;
10590 f
->bindings
= NULL
;
10592 /* Handle attribute((warn_unused_result)). Relies on gimple input. */
10593 c_warn_unused_result (&DECL_SAVED_TREE (fndecl
));
10595 /* Clear out the bits we don't need. */
10596 local_names
= NULL
;
10597 named_label_uses
= NULL
;
10599 /* We're leaving the context of this function, so zap cfun. It's still in
10600 DECL_STRUCT_FUNCTION, and we'll restore it in tree_rest_of_compilation. */
10602 current_function_decl
= NULL
;
10604 /* If this is an in-class inline definition, we may have to pop the
10605 bindings for the template parameters that we added in
10606 maybe_begin_member_template_processing when start_function was
10608 if (inclass_inline
)
10609 maybe_end_member_template_processing ();
10611 /* Leave the scope of the class. */
10613 pop_nested_class ();
10619 /* Let the error reporting routines know that we're outside a
10620 function. For a nested function, this value is used in
10621 cxx_pop_function_context and then reset via pop_function_context. */
10622 current_function_decl
= NULL_TREE
;
10627 /* Create the FUNCTION_DECL for a function definition.
10628 DECLSPECS and DECLARATOR are the parts of the declaration;
10629 they describe the return type and the name of the function,
10630 but twisted together in a fashion that parallels the syntax of C.
10632 This function creates a binding context for the function body
10633 as well as setting up the FUNCTION_DECL in current_function_decl.
10635 Returns a FUNCTION_DECL on success.
10637 If the DECLARATOR is not suitable for a function (it defines a datum
10638 instead), we return 0, which tells yyparse to report a parse error.
10640 May return void_type_node indicating that this method is actually
10641 a friend. See grokfield for more details.
10643 Came here with a `.pushlevel' .
10645 DO NOT MAKE ANY CHANGES TO THIS CODE WITHOUT MAKING CORRESPONDING
10646 CHANGES TO CODE IN `grokfield'. */
10649 start_method (cp_decl_specifier_seq
*declspecs
,
10650 const cp_declarator
*declarator
, tree attrlist
)
10652 tree fndecl
= grokdeclarator (declarator
, declspecs
, MEMFUNCDEF
, 0,
10655 if (fndecl
== error_mark_node
)
10656 return error_mark_node
;
10658 if (fndecl
== NULL
|| TREE_CODE (fndecl
) != FUNCTION_DECL
)
10660 error ("invalid member function declaration");
10661 return error_mark_node
;
10665 cplus_decl_attributes (&fndecl
, attrlist
, 0);
10667 /* Pass friends other than inline friend functions back. */
10668 if (fndecl
== void_type_node
)
10671 if (DECL_IN_AGGR_P (fndecl
))
10673 if (DECL_CONTEXT (fndecl
)
10674 && TREE_CODE( DECL_CONTEXT (fndecl
)) != NAMESPACE_DECL
)
10675 error ("`%D' is already defined in class `%T'", fndecl
,
10676 DECL_CONTEXT (fndecl
));
10677 return void_type_node
;
10680 check_template_shadow (fndecl
);
10682 DECL_DECLARED_INLINE_P (fndecl
) = 1;
10683 if (flag_default_inline
)
10684 DECL_INLINE (fndecl
) = 1;
10686 /* We process method specializations in finish_struct_1. */
10687 if (processing_template_decl
&& !DECL_TEMPLATE_SPECIALIZATION (fndecl
))
10689 fndecl
= push_template_decl (fndecl
);
10690 if (fndecl
== error_mark_node
)
10694 if (! DECL_FRIEND_P (fndecl
))
10696 if (TREE_CHAIN (fndecl
))
10698 fndecl
= copy_node (fndecl
);
10699 TREE_CHAIN (fndecl
) = NULL_TREE
;
10701 grok_special_member_properties (fndecl
);
10704 cp_finish_decl (fndecl
, NULL_TREE
, NULL_TREE
, 0);
10706 /* Make a place for the parms. */
10707 begin_scope (sk_function_parms
, fndecl
);
10709 DECL_IN_AGGR_P (fndecl
) = 1;
10713 /* Go through the motions of finishing a function definition.
10714 We don't compile this method until after the whole class has
10717 FINISH_METHOD must return something that looks as though it
10718 came from GROKFIELD (since we are defining a method, after all).
10720 This is called after parsing the body of the function definition.
10721 STMTS is the chain of statements that makes up the function body.
10723 DECL is the ..._DECL that `start_method' provided. */
10726 finish_method (tree decl
)
10728 tree fndecl
= decl
;
10733 if (decl
== void_type_node
)
10736 old_initial
= DECL_INITIAL (fndecl
);
10738 /* Undo the level for the parms (from start_method).
10739 This is like poplevel, but it causes nothing to be
10740 saved. Saving information here confuses symbol-table
10741 output routines. Besides, this information will
10742 be correctly output when this method is actually
10745 /* Clear out the meanings of the local variables of this level;
10746 also record in each decl which block it belongs to. */
10748 for (link
= current_binding_level
->names
; link
; link
= TREE_CHAIN (link
))
10750 if (DECL_NAME (link
) != NULL_TREE
)
10751 pop_binding (DECL_NAME (link
), link
);
10752 gcc_assert (TREE_CODE (link
) != FUNCTION_DECL
);
10753 DECL_CONTEXT (link
) = NULL_TREE
;
10756 poplevel (0, 0, 0);
10758 DECL_INITIAL (fndecl
) = old_initial
;
10760 /* We used to check if the context of FNDECL was different from
10761 current_class_type as another way to get inside here. This didn't work
10762 for String.cc in libg++. */
10763 if (DECL_FRIEND_P (fndecl
))
10765 VEC_safe_push (tree
, CLASSTYPE_INLINE_FRIENDS (current_class_type
),
10767 decl
= void_type_node
;
10774 /* VAR is a VAR_DECL. If its type is incomplete, remember VAR so that
10775 we can lay it out later, when and if its type becomes complete. */
10778 maybe_register_incomplete_var (tree var
)
10780 gcc_assert (TREE_CODE (var
) == VAR_DECL
);
10782 /* Keep track of variables with incomplete types. */
10783 if (!processing_template_decl
&& TREE_TYPE (var
) != error_mark_node
10784 && DECL_EXTERNAL (var
))
10786 tree inner_type
= TREE_TYPE (var
);
10788 while (TREE_CODE (inner_type
) == ARRAY_TYPE
)
10789 inner_type
= TREE_TYPE (inner_type
);
10790 inner_type
= TYPE_MAIN_VARIANT (inner_type
);
10792 if ((!COMPLETE_TYPE_P (inner_type
) && CLASS_TYPE_P (inner_type
))
10793 /* RTTI TD entries are created while defining the type_info. */
10794 || (TYPE_LANG_SPECIFIC (inner_type
)
10795 && TYPE_BEING_DEFINED (inner_type
)))
10796 incomplete_vars
= tree_cons (inner_type
, var
, incomplete_vars
);
10800 /* Called when a class type (given by TYPE) is defined. If there are
10801 any existing VAR_DECLs whose type hsa been completed by this
10802 declaration, update them now. */
10805 complete_vars (tree type
)
10807 tree
*list
= &incomplete_vars
;
10809 gcc_assert (CLASS_TYPE_P (type
));
10812 if (same_type_p (type
, TREE_PURPOSE (*list
)))
10814 tree var
= TREE_VALUE (*list
);
10815 /* Complete the type of the variable. The VAR_DECL itself
10816 will be laid out in expand_expr. */
10817 complete_type (TREE_TYPE (var
));
10818 /* Remove this entry from the list. */
10819 *list
= TREE_CHAIN (*list
);
10822 list
= &TREE_CHAIN (*list
);
10825 /* Check for pending declarations which may have abstract type. */
10826 complete_type_check_abstract (type
);
10829 /* If DECL is of a type which needs a cleanup, build that cleanup
10833 cxx_maybe_build_cleanup (tree decl
)
10835 tree type
= TREE_TYPE (decl
);
10837 if (type
!= error_mark_node
&& TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type
))
10839 int flags
= LOOKUP_NORMAL
|LOOKUP_DESTRUCTOR
;
10841 bool has_vbases
= (TREE_CODE (type
) == RECORD_TYPE
10842 && CLASSTYPE_VBASECLASSES (type
));
10844 if (TREE_CODE (type
) == ARRAY_TYPE
)
10848 cxx_mark_addressable (decl
);
10849 rval
= build_unary_op (ADDR_EXPR
, decl
, 0);
10852 /* Optimize for space over speed here. */
10853 if (!has_vbases
|| flag_expensive_optimizations
)
10854 flags
|= LOOKUP_NONVIRTUAL
;
10856 rval
= build_delete (TREE_TYPE (rval
), rval
,
10857 sfk_complete_destructor
, flags
, 0);
10859 if (has_vbases
&& !TYPE_HAS_DESTRUCTOR (type
))
10860 rval
= build_compound_expr (rval
, build_vbase_delete (type
, decl
));
10867 /* When a stmt has been parsed, this function is called. */
10874 /* DECL was originally constructed as a non-static member function,
10875 but turned out to be static. Update it accordingly. */
10878 revert_static_member_fn (tree decl
)
10881 tree function
= TREE_TYPE (decl
);
10882 tree args
= TYPE_ARG_TYPES (function
);
10884 if (cp_type_quals (TREE_TYPE (TREE_VALUE (args
)))
10885 != TYPE_UNQUALIFIED
)
10886 error ("static member function `%#D' declared with type qualifiers",
10889 args
= TREE_CHAIN (args
);
10890 tmp
= build_function_type (TREE_TYPE (function
), args
);
10891 tmp
= build_qualified_type (tmp
, cp_type_quals (function
));
10892 tmp
= build_exception_variant (tmp
,
10893 TYPE_RAISES_EXCEPTIONS (function
));
10894 TREE_TYPE (decl
) = tmp
;
10895 if (DECL_ARGUMENTS (decl
))
10896 DECL_ARGUMENTS (decl
) = TREE_CHAIN (DECL_ARGUMENTS (decl
));
10897 DECL_STATIC_FUNCTION_P (decl
) = 1;
10900 /* Initialize the variables used during compilation of a C++
10904 cxx_push_function_context (struct function
* f
)
10906 struct language_function
*p
= GGC_CNEW (struct language_function
);
10909 /* Whenever we start a new function, we destroy temporaries in the
10911 current_stmt_tree ()->stmts_are_full_exprs_p
= 1;
10917 if (DECL_SAVED_FUNCTION_DATA (fn
))
10919 /* If we already parsed this function, and we're just expanding it
10920 now, restore saved state. */
10921 *cp_function_chain
= *DECL_SAVED_FUNCTION_DATA (fn
);
10923 /* We don't need the saved data anymore. Unless this is an inline
10924 function; we need the named return value info for
10925 declare_return_variable. */
10926 if (! DECL_INLINE (fn
))
10927 DECL_SAVED_FUNCTION_DATA (fn
) = NULL
;
10932 /* Free the language-specific parts of F, now that we've finished
10933 compiling the function. */
10936 cxx_pop_function_context (struct function
* f
)
10941 /* Return which tree structure is used by T, or TS_CP_GENERIC if T is
10942 one of the language-independent trees. */
10944 enum cp_tree_node_structure_enum
10945 cp_tree_node_structure (union lang_tree_node
* t
)
10947 switch (TREE_CODE (&t
->generic
))
10949 case DEFAULT_ARG
: return TS_CP_DEFAULT_ARG
;
10950 case IDENTIFIER_NODE
: return TS_CP_IDENTIFIER
;
10951 case OVERLOAD
: return TS_CP_OVERLOAD
;
10952 case TEMPLATE_PARM_INDEX
: return TS_CP_TPI
;
10953 case TINST_LEVEL
: return TS_CP_TINST_LEVEL
;
10954 case PTRMEM_CST
: return TS_CP_PTRMEM
;
10955 case BASELINK
: return TS_CP_BASELINK
;
10956 default: return TS_CP_GENERIC
;
10960 /* Build the void_list_node (void_type_node having been created). */
10962 build_void_list_node (void)
10964 tree t
= build_tree_list (NULL_TREE
, void_type_node
);
10969 cp_missing_noreturn_ok_p (tree decl
)
10971 /* A missing noreturn is ok for the `main' function. */
10972 return DECL_MAIN_P (decl
);
10975 /* Return the COMDAT group into which DECL should be placed. */
10978 cxx_comdat_group (tree decl
)
10982 /* Virtual tables, construction virtual tables, and virtual table
10983 tables all go in a single COMDAT group, named after the primary
10985 if (TREE_CODE (decl
) == VAR_DECL
&& DECL_VTABLE_OR_VTT_P (decl
))
10986 name
= DECL_ASSEMBLER_NAME (CLASSTYPE_VTABLES (DECL_CONTEXT (decl
)));
10987 /* For all other DECLs, the COMDAT group is the mangled name of the
10988 declaration itself. */
10990 name
= DECL_ASSEMBLER_NAME (decl
);
10992 return IDENTIFIER_POINTER (name
);
10995 #include "gt-cp-decl.h"