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, 2005 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
grokvardecl (tree
, tree
, const cp_decl_specifier_seq
*,
66 static void record_unknown_type (tree
, const char *);
67 static tree
builtin_function_1 (const char *, tree
, tree
,
68 enum built_in_function code
,
69 enum built_in_class cl
, const char *,
71 static tree
build_library_fn_1 (tree
, enum tree_code
, tree
);
72 static int member_function_or_else (tree
, tree
, enum overload_flags
);
73 static void bad_specifiers (tree
, const char *, int, int, int, int,
75 static void check_for_uninitialized_const_var (tree
);
76 static hashval_t
typename_hash (const void *);
77 static int typename_compare (const void *, const void *);
78 static tree
local_variable_p_walkfn (tree
*, int *, void *);
79 static tree
record_builtin_java_type (const char *, int);
80 static const char *tag_name (enum tag_types
);
81 static tree
lookup_and_check_tag (enum tag_types
, tree
, tag_scope
, bool);
82 static int walk_namespaces_r (tree
, walk_namespaces_fn
, void *);
83 static tree
make_label_decl (tree
, int);
84 static void use_label (tree
);
85 static void check_previous_goto_1 (tree
, struct cp_binding_level
*, tree
,
87 static void check_previous_goto (struct named_label_use_list
*);
88 static void check_switch_goto (struct cp_binding_level
*);
89 static void check_previous_gotos (tree
);
90 static void pop_label (tree
, tree
);
91 static void pop_labels (tree
);
92 static void maybe_deduce_size_from_array_init (tree
, tree
);
93 static void layout_var_decl (tree
);
94 static void maybe_commonize_var (tree
);
95 static tree
check_initializer (tree
, tree
, int, tree
*);
96 static void make_rtl_for_nonlocal_decl (tree
, tree
, const char *);
97 static void save_function_data (tree
);
98 static void check_function_type (tree
, tree
);
99 static void finish_constructor_body (void);
100 static void begin_destructor_body (void);
101 static void finish_destructor_body (void);
102 static tree
create_array_type_for_decl (tree
, tree
, tree
);
103 static tree
get_atexit_node (void);
104 static tree
get_dso_handle_node (void);
105 static tree
start_cleanup_fn (void);
106 static void end_cleanup_fn (void);
107 static tree
cp_make_fname_decl (tree
, int);
108 static void initialize_predefined_identifiers (void);
109 static tree check_special_function_return_type
110 (special_function_kind
, tree
, tree
);
111 static tree
push_cp_library_fn (enum tree_code
, tree
);
112 static tree
build_cp_library_fn (tree
, enum tree_code
, tree
);
113 static void store_parm_decls (tree
);
114 static void initialize_local_var (tree
, tree
);
115 static void expand_static_init (tree
, tree
);
116 static tree
next_initializable_field (tree
);
117 static tree
reshape_init (tree
, tree
*);
119 /* Erroneous argument lists can use this *IFF* they do not modify it. */
120 tree error_mark_list
;
122 /* The following symbols are subsumed in the cp_global_trees array, and
123 listed here individually for documentation purposes.
126 tree wchar_decl_node;
128 tree vtable_entry_type;
129 tree delta_type_node;
130 tree __t_desc_type_node;
131 tree ti_desc_type_node;
132 tree bltn_desc_type_node, ptr_desc_type_node;
133 tree ary_desc_type_node, func_desc_type_node, enum_desc_type_node;
134 tree class_desc_type_node, si_class_desc_type_node, vmi_class_desc_type_node;
135 tree ptm_desc_type_node;
136 tree base_desc_type_node;
138 tree class_type_node;
139 tree unknown_type_node;
141 Array type `vtable_entry_type[]'
144 tree vtbl_ptr_type_node;
151 A FUNCTION_DECL which can call `abort'. Not necessarily the
152 one that the user will declare, but sufficient to be called
153 by routines that want to abort the program.
157 The FUNCTION_DECL for the default `::operator delete'.
159 tree global_delete_fndecl;
162 tree type_info_type_node, tinfo_decl_id, tinfo_decl_type;
167 tree cp_global_trees
[CPTI_MAX
];
169 /* Indicates that there is a type value in some namespace, although
170 that is not necessarily in scope at the moment. */
172 tree global_type_node
;
174 /* The node that holds the "name" of the global scope. */
175 tree global_scope_name
;
177 /* Used only for jumps to as-yet undefined labels, since jumps to
178 defined labels can have their validity checked immediately. */
180 struct named_label_use_list
GTY(())
182 struct cp_binding_level
*binding_level
;
185 location_t o_goto_locus
;
186 struct named_label_use_list
*next
;
189 #define named_label_uses cp_function_chain->x_named_label_uses
191 #define local_names cp_function_chain->x_local_names
193 /* A list of objects which have constructors or destructors
194 which reside in the global scope. The decl is stored in
195 the TREE_VALUE slot and the initializer is stored
196 in the TREE_PURPOSE slot. */
197 tree static_aggregates
;
201 /* A node for the integer constants 2, and 3. */
203 tree integer_two_node
, integer_three_node
;
205 /* A list of all LABEL_DECLs in the function that have names. Here so
206 we can clear out their names' definitions at the end of the
207 function, and so we can check the validity of jumps to these labels. */
209 struct named_label_list
GTY(())
211 struct cp_binding_level
*binding_level
;
216 struct named_label_list
*next
;
217 unsigned int in_try_scope
: 1;
218 unsigned int in_catch_scope
: 1;
221 #define named_labels cp_function_chain->x_named_labels
223 /* The number of function bodies which we are currently processing.
224 (Zero if we are at namespace scope, one inside the body of a
225 function, two inside the body of a function in a local class, etc.) */
228 /* States indicating how grokdeclarator() should handle declspecs marked
229 with __attribute__((deprecated)). An object declared as
230 __attribute__((deprecated)) suppresses warnings of uses of other
233 enum deprecated_states
{
238 static enum deprecated_states deprecated_state
= DEPRECATED_NORMAL
;
240 /* True if a declaration with an `extern' linkage specifier is being
242 bool have_extern_spec
;
245 /* A TREE_LIST of VAR_DECLs. The TREE_PURPOSE is a RECORD_TYPE or
246 UNION_TYPE; the TREE_VALUE is a VAR_DECL with that type. At the
247 time the VAR_DECL was declared, the type was incomplete. */
249 static GTY(()) tree incomplete_vars
;
251 /* Returns the kind of template specialization we are currently
252 processing, given that it's declaration contained N_CLASS_SCOPES
253 explicit scope qualifications. */
256 current_tmpl_spec_kind (int n_class_scopes
)
258 int n_template_parm_scopes
= 0;
259 int seen_specialization_p
= 0;
260 int innermost_specialization_p
= 0;
261 struct cp_binding_level
*b
;
263 /* Scan through the template parameter scopes. */
264 for (b
= current_binding_level
;
265 b
->kind
== sk_template_parms
;
268 /* If we see a specialization scope inside a parameter scope,
269 then something is wrong. That corresponds to a declaration
272 template <class T> template <> ...
274 which is always invalid since [temp.expl.spec] forbids the
275 specialization of a class member template if the enclosing
276 class templates are not explicitly specialized as well. */
277 if (b
->explicit_spec_p
)
279 if (n_template_parm_scopes
== 0)
280 innermost_specialization_p
= 1;
282 seen_specialization_p
= 1;
284 else if (seen_specialization_p
== 1)
285 return tsk_invalid_member_spec
;
287 ++n_template_parm_scopes
;
290 /* Handle explicit instantiations. */
291 if (processing_explicit_instantiation
)
293 if (n_template_parm_scopes
!= 0)
294 /* We've seen a template parameter list during an explicit
295 instantiation. For example:
297 template <class T> template void f(int);
299 This is erroneous. */
300 return tsk_invalid_expl_inst
;
302 return tsk_expl_inst
;
305 if (n_template_parm_scopes
< n_class_scopes
)
306 /* We've not seen enough template headers to match all the
307 specialized classes present. For example:
309 template <class T> void R<T>::S<T>::f(int);
311 This is invalid; there needs to be one set of template
312 parameters for each class. */
313 return tsk_insufficient_parms
;
314 else if (n_template_parm_scopes
== n_class_scopes
)
315 /* We're processing a non-template declaration (even though it may
316 be a member of a template class.) For example:
318 template <class T> void S<T>::f(int);
320 The `class T' maches the `S<T>', leaving no template headers
321 corresponding to the `f'. */
323 else if (n_template_parm_scopes
> n_class_scopes
+ 1)
324 /* We've got too many template headers. For example:
326 template <> template <class T> void f (T);
328 There need to be more enclosing classes. */
329 return tsk_excessive_parms
;
331 /* This must be a template. It's of the form:
333 template <class T> template <class U> void S<T>::f(U);
335 This is a specialization if the innermost level was a
336 specialization; otherwise it's just a definition of the
338 return innermost_specialization_p
? tsk_expl_spec
: tsk_template
;
341 /* Exit the current scope. */
349 /* When a label goes out of scope, check to see if that label was used
350 in a valid manner, and issue any appropriate warnings or errors. */
353 pop_label (tree label
, tree old_value
)
355 if (!processing_template_decl
)
357 if (DECL_INITIAL (label
) == NULL_TREE
)
361 cp_error_at ("label %qD used but not defined", label
);
362 #ifdef USE_MAPPED_LOCATION
363 location
= input_location
; /* FIXME want (input_filename, (line)0) */
365 location
.file
= input_filename
;
368 /* Avoid crashing later. */
369 define_label (location
, DECL_NAME (label
));
371 else if (warn_unused_label
&& !TREE_USED (label
))
372 cp_warning_at ("label %qD defined but not used", label
);
375 SET_IDENTIFIER_LABEL_VALUE (DECL_NAME (label
), old_value
);
378 /* At the end of a function, all labels declared within the function
379 go out of scope. BLOCK is the top-level block for the
383 pop_labels (tree block
)
385 struct named_label_list
*link
;
387 /* Clear out the definitions of all label names, since their scopes
389 for (link
= named_labels
; link
; link
= link
->next
)
391 pop_label (link
->label_decl
, link
->old_value
);
392 /* Put the labels into the "variables" of the top-level block,
393 so debugger can see them. */
394 TREE_CHAIN (link
->label_decl
) = BLOCK_VARS (block
);
395 BLOCK_VARS (block
) = link
->label_decl
;
401 /* The following two routines are used to interface to Objective-C++.
402 The binding level is purposely treated as an opaque type. */
405 objc_get_current_scope (void)
407 return current_binding_level
;
410 /* The following routine is used by the NeXT-style SJLJ exceptions;
411 variables get marked 'volatile' so as to not be clobbered by
412 _setjmp()/_longjmp() calls. All variables in the current scope,
413 as well as parent scopes up to (but not including) ENCLOSING_BLK
414 shall be thusly marked. */
417 objc_mark_locals_volatile (void *enclosing_blk
)
419 struct cp_binding_level
*scope
;
421 for (scope
= current_binding_level
;
422 scope
&& scope
!= enclosing_blk
&& scope
->kind
== sk_block
;
423 scope
= scope
->level_chain
)
427 for (decl
= scope
->names
; decl
; decl
= TREE_CHAIN (decl
))
429 if (TREE_CODE (decl
) == VAR_DECL
)
431 DECL_REGISTER (decl
) = 0;
432 TREE_THIS_VOLATILE (decl
) = 1;
438 /* Exit a binding level.
439 Pop the level off, and restore the state of the identifier-decl mappings
440 that were in effect when this level was entered.
442 If KEEP == 1, this level had explicit declarations, so
443 and create a "block" (a BLOCK node) for the level
444 to record its declarations and subblocks for symbol table output.
446 If FUNCTIONBODY is nonzero, this level is the body of a function,
447 so create a block as if KEEP were set and also clear out all
450 If REVERSE is nonzero, reverse the order of decls before putting
451 them into the BLOCK. */
454 poplevel (int keep
, int reverse
, int functionbody
)
457 /* The chain of decls was accumulated in reverse order.
458 Put it into forward order, just for cleanliness. */
460 int tmp
= functionbody
;
461 int real_functionbody
;
465 int leaving_for_scope
;
468 timevar_push (TV_NAME_LOOKUP
);
473 gcc_assert (current_binding_level
->kind
!= sk_class
);
475 real_functionbody
= (current_binding_level
->kind
== sk_cleanup
476 ? ((functionbody
= 0), tmp
) : functionbody
);
477 subblocks
= functionbody
>= 0 ? current_binding_level
->blocks
: 0;
479 gcc_assert (!VEC_length(cp_class_binding
,
480 current_binding_level
->class_shadowed
));
482 /* We used to use KEEP == 2 to indicate that the new block should go
483 at the beginning of the list of blocks at this binding level,
484 rather than the end. This hack is no longer used. */
485 gcc_assert (keep
== 0 || keep
== 1);
487 if (current_binding_level
->keep
)
490 /* Any uses of undefined labels, and any defined labels, now operate
491 under constraints of next binding contour. */
492 if (cfun
&& !functionbody
)
494 struct cp_binding_level
*level_chain
;
495 level_chain
= current_binding_level
->level_chain
;
498 struct named_label_use_list
*uses
;
499 struct named_label_list
*labels
;
500 for (labels
= named_labels
; labels
; labels
= labels
->next
)
501 if (labels
->binding_level
== current_binding_level
)
504 if (current_binding_level
->kind
== sk_try
)
505 labels
->in_try_scope
= 1;
506 if (current_binding_level
->kind
== sk_catch
)
507 labels
->in_catch_scope
= 1;
508 for (decl
= labels
->names_in_scope
; decl
;
509 decl
= TREE_CHAIN (decl
))
510 if (decl_jump_unsafe (decl
))
511 labels
->bad_decls
= tree_cons (NULL_TREE
, decl
,
513 labels
->binding_level
= level_chain
;
514 labels
->names_in_scope
= level_chain
->names
;
517 for (uses
= named_label_uses
; uses
; uses
= uses
->next
)
518 if (uses
->binding_level
== current_binding_level
)
520 uses
->binding_level
= level_chain
;
521 uses
->names_in_scope
= level_chain
->names
;
526 /* Get the decls in the order they were written.
527 Usually current_binding_level->names is in reverse order.
528 But parameter decls were previously put in forward order. */
531 current_binding_level
->names
532 = decls
= nreverse (current_binding_level
->names
);
534 decls
= current_binding_level
->names
;
536 /* If there were any declarations or structure tags in that level,
537 or if this level is a function body,
538 create a BLOCK to record them for the life of this function. */
540 if (keep
== 1 || functionbody
)
541 block
= make_node (BLOCK
);
542 if (block
!= NULL_TREE
)
544 BLOCK_VARS (block
) = decls
;
545 BLOCK_SUBBLOCKS (block
) = subblocks
;
548 /* In each subblock, record that this is its superior. */
550 for (link
= subblocks
; link
; link
= TREE_CHAIN (link
))
551 BLOCK_SUPERCONTEXT (link
) = block
;
553 /* We still support the old for-scope rules, whereby the variables
554 in a for-init statement were in scope after the for-statement
555 ended. We only use the new rules if flag_new_for_scope is
558 = current_binding_level
->kind
== sk_for
&& flag_new_for_scope
== 1;
560 /* Before we remove the declarations first check for unused variables. */
561 if (warn_unused_variable
562 && !processing_template_decl
)
563 for (decl
= getdecls (); decl
; decl
= TREE_CHAIN (decl
))
564 if (TREE_CODE (decl
) == VAR_DECL
565 && ! TREE_USED (decl
)
566 && ! DECL_IN_SYSTEM_HEADER (decl
)
567 && DECL_NAME (decl
) && ! DECL_ARTIFICIAL (decl
))
568 warning ("%Junused variable %qD", decl
, decl
);
570 /* Remove declarations for all the DECLs in this level. */
571 for (link
= decls
; link
; link
= TREE_CHAIN (link
))
573 if (leaving_for_scope
&& TREE_CODE (link
) == VAR_DECL
576 tree name
= DECL_NAME (link
);
580 ob
= outer_binding (name
,
581 IDENTIFIER_BINDING (name
),
584 ns_binding
= IDENTIFIER_NAMESPACE_VALUE (name
);
586 ns_binding
= NULL_TREE
;
588 if (ob
&& ob
->scope
== current_binding_level
->level_chain
)
589 /* We have something like:
594 and we are leaving the `for' scope. There's no reason to
595 keep the binding of the inner `i' in this case. */
596 pop_binding (name
, link
);
597 else if ((ob
&& (TREE_CODE (ob
->value
) == TYPE_DECL
))
598 || (ns_binding
&& TREE_CODE (ns_binding
) == TYPE_DECL
))
599 /* Here, we have something like:
607 We must pop the for-scope binding so we know what's a
608 type and what isn't. */
609 pop_binding (name
, link
);
612 /* Mark this VAR_DECL as dead so that we can tell we left it
613 there only for backward compatibility. */
614 DECL_DEAD_FOR_LOCAL (link
) = 1;
616 /* Keep track of what should have happened when we
617 popped the binding. */
619 DECL_SHADOWED_FOR_VAR (link
) = ob
->value
;
621 /* Add it to the list of dead variables in the next
622 outermost binding to that we can remove these when we
623 leave that binding. */
624 current_binding_level
->level_chain
->dead_vars_from_for
625 = tree_cons (NULL_TREE
, link
,
626 current_binding_level
->level_chain
->
629 /* Although we don't pop the cxx_binding, we do clear
630 its SCOPE since the scope is going away now. */
631 IDENTIFIER_BINDING (name
)->scope
632 = current_binding_level
->level_chain
;
639 /* Remove the binding. */
642 if (TREE_CODE (decl
) == TREE_LIST
)
643 decl
= TREE_VALUE (decl
);
646 if (TREE_CODE (name
) == OVERLOAD
)
647 name
= OVL_FUNCTION (name
);
649 gcc_assert (DECL_P (name
));
650 pop_binding (DECL_NAME (name
), decl
);
654 /* Remove declarations for any `for' variables from inner scopes
655 that we kept around. */
656 for (link
= current_binding_level
->dead_vars_from_for
;
657 link
; link
= TREE_CHAIN (link
))
658 pop_binding (DECL_NAME (TREE_VALUE (link
)), TREE_VALUE (link
));
660 /* Restore the IDENTIFIER_TYPE_VALUEs. */
661 for (link
= current_binding_level
->type_shadowed
;
662 link
; link
= TREE_CHAIN (link
))
663 SET_IDENTIFIER_TYPE_VALUE (TREE_PURPOSE (link
), TREE_VALUE (link
));
665 /* Restore the IDENTIFIER_LABEL_VALUEs for local labels. */
666 for (link
= current_binding_level
->shadowed_labels
;
668 link
= TREE_CHAIN (link
))
669 pop_label (TREE_VALUE (link
), TREE_PURPOSE (link
));
671 /* There may be OVERLOADs (wrapped in TREE_LISTs) on the BLOCK_VARs
672 list if a `using' declaration put them there. The debugging
673 back-ends won't understand OVERLOAD, so we remove them here.
674 Because the BLOCK_VARS are (temporarily) shared with
675 CURRENT_BINDING_LEVEL->NAMES we must do this fixup after we have
676 popped all the bindings. */
681 for (d
= &BLOCK_VARS (block
); *d
; )
683 if (TREE_CODE (*d
) == TREE_LIST
)
684 *d
= TREE_CHAIN (*d
);
686 d
= &TREE_CHAIN (*d
);
690 /* If the level being exited is the top level of a function,
691 check over all the labels. */
694 /* Since this is the top level block of a function, the vars are
695 the function's parameters. Don't leave them in the BLOCK
696 because they are found in the FUNCTION_DECL instead. */
697 BLOCK_VARS (block
) = 0;
701 kind
= current_binding_level
->kind
;
702 if (kind
== sk_cleanup
)
706 /* If this is a temporary binding created for a cleanup, then we'll
707 have pushed a statement list level. Pop that, create a new
708 BIND_EXPR for the block, and insert it into the stream. */
709 stmt
= pop_stmt_list (current_binding_level
->statement_list
);
710 stmt
= c_build_bind_expr (block
, stmt
);
716 DECL_INITIAL (current_function_decl
) = block
;
718 current_binding_level
->blocks
719 = chainon (current_binding_level
->blocks
, block
);
721 /* If we did not make a block for the level just exited,
722 any blocks made for inner levels
723 (since they cannot be recorded as subblocks in that level)
724 must be carried forward so they will later become subblocks
725 of something else. */
727 current_binding_level
->blocks
728 = chainon (current_binding_level
->blocks
, subblocks
);
730 /* Each and every BLOCK node created here in `poplevel' is important
731 (e.g. for proper debugging information) so if we created one
732 earlier, mark it as "used". */
734 TREE_USED (block
) = 1;
736 /* All temporary bindings created for cleanups are popped silently. */
737 if (kind
== sk_cleanup
)
740 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP
, block
);
743 /* Insert BLOCK at the end of the list of subblocks of the
744 current binding level. This is used when a BIND_EXPR is expanded,
745 to handle the BLOCK node inside the BIND_EXPR. */
748 insert_block (tree block
)
750 TREE_USED (block
) = 1;
751 current_binding_level
->blocks
752 = chainon (current_binding_level
->blocks
, block
);
755 /* Walk all the namespaces contained NAMESPACE, including NAMESPACE
756 itself, calling F for each. The DATA is passed to F as well. */
759 walk_namespaces_r (tree
namespace, walk_namespaces_fn f
, void* data
)
762 tree current
= NAMESPACE_LEVEL (namespace)->namespaces
;
764 result
|= (*f
) (namespace, data
);
766 for (; current
; current
= TREE_CHAIN (current
))
767 result
|= walk_namespaces_r (current
, f
, data
);
772 /* Walk all the namespaces, calling F for each. The DATA is passed to
776 walk_namespaces (walk_namespaces_fn f
, void* data
)
778 return walk_namespaces_r (global_namespace
, f
, data
);
781 /* Call wrapup_globals_declarations for the globals in NAMESPACE. If
782 DATA is non-NULL, this is the last time we will call
783 wrapup_global_declarations for this NAMESPACE. */
786 wrapup_globals_for_namespace (tree
namespace, void* data
)
788 struct cp_binding_level
*level
= NAMESPACE_LEVEL (namespace);
789 varray_type statics
= level
->static_decls
;
790 tree
*vec
= &VARRAY_TREE (statics
, 0);
791 int len
= VARRAY_ACTIVE_SIZE (statics
);
792 int last_time
= (data
!= 0);
796 check_global_declarations (vec
, len
);
800 /* Write out any globals that need to be output. */
801 return wrapup_global_declarations (vec
, len
);
805 /* In C++, you don't have to write `struct S' to refer to `S'; you
806 can just use `S'. We accomplish this by creating a TYPE_DECL as
807 if the user had written `typedef struct S S'. Create and return
808 the TYPE_DECL for TYPE. */
811 create_implicit_typedef (tree name
, tree type
)
815 decl
= build_decl (TYPE_DECL
, name
, type
);
816 DECL_ARTIFICIAL (decl
) = 1;
817 /* There are other implicit type declarations, like the one *within*
818 a class that allows you to write `S::S'. We must distinguish
820 SET_DECL_IMPLICIT_TYPEDEF_P (decl
);
821 TYPE_NAME (type
) = decl
;
826 /* Remember a local name for name-mangling purposes. */
829 push_local_name (tree decl
)
834 timevar_push (TV_NAME_LOOKUP
);
836 VARRAY_TREE_INIT (local_names
, 8, "local_names");
838 name
= DECL_NAME (decl
);
840 nelts
= VARRAY_ACTIVE_SIZE (local_names
);
841 for (i
= 0; i
< nelts
; i
++)
843 t
= VARRAY_TREE (local_names
, i
);
844 if (DECL_NAME (t
) == name
)
846 if (!DECL_LANG_SPECIFIC (decl
))
847 retrofit_lang_decl (decl
);
848 DECL_LANG_SPECIFIC (decl
)->decl_flags
.u2sel
= 1;
849 if (DECL_LANG_SPECIFIC (t
))
850 DECL_DISCRIMINATOR (decl
) = DECL_DISCRIMINATOR (t
) + 1;
852 DECL_DISCRIMINATOR (decl
) = 1;
854 VARRAY_TREE (local_names
, i
) = decl
;
855 timevar_pop (TV_NAME_LOOKUP
);
860 VARRAY_PUSH_TREE (local_names
, decl
);
861 timevar_pop (TV_NAME_LOOKUP
);
864 /* Subroutine of duplicate_decls: return truthvalue of whether
865 or not types of these decls match.
867 For C++, we must compare the parameter list so that `int' can match
868 `int&' in a parameter position, but `int&' is not confused with
872 decls_match (tree newdecl
, tree olddecl
)
876 if (newdecl
== olddecl
)
879 if (TREE_CODE (newdecl
) != TREE_CODE (olddecl
))
880 /* If the two DECLs are not even the same kind of thing, we're not
881 interested in their types. */
884 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
886 tree f1
= TREE_TYPE (newdecl
);
887 tree f2
= TREE_TYPE (olddecl
);
888 tree p1
= TYPE_ARG_TYPES (f1
);
889 tree p2
= TYPE_ARG_TYPES (f2
);
891 if (CP_DECL_CONTEXT (newdecl
) != CP_DECL_CONTEXT (olddecl
)
892 && ! (DECL_EXTERN_C_P (newdecl
)
893 && DECL_EXTERN_C_P (olddecl
)))
896 if (TREE_CODE (f1
) != TREE_CODE (f2
))
899 if (same_type_p (TREE_TYPE (f1
), TREE_TYPE (f2
)))
901 if (p2
== NULL_TREE
&& DECL_EXTERN_C_P (olddecl
)
902 && (DECL_BUILT_IN (olddecl
)
903 #ifndef NO_IMPLICIT_EXTERN_C
904 || (DECL_IN_SYSTEM_HEADER (newdecl
) && !DECL_CLASS_SCOPE_P (newdecl
))
905 || (DECL_IN_SYSTEM_HEADER (olddecl
) && !DECL_CLASS_SCOPE_P (olddecl
))
909 types_match
= self_promoting_args_p (p1
);
910 if (p1
== void_list_node
)
911 TREE_TYPE (newdecl
) = TREE_TYPE (olddecl
);
913 #ifndef NO_IMPLICIT_EXTERN_C
914 else if (p1
== NULL_TREE
915 && (DECL_EXTERN_C_P (olddecl
)
916 && DECL_IN_SYSTEM_HEADER (olddecl
)
917 && !DECL_CLASS_SCOPE_P (olddecl
))
918 && (DECL_EXTERN_C_P (newdecl
)
919 && DECL_IN_SYSTEM_HEADER (newdecl
)
920 && !DECL_CLASS_SCOPE_P (newdecl
)))
922 types_match
= self_promoting_args_p (p2
);
923 TREE_TYPE (newdecl
) = TREE_TYPE (olddecl
);
927 types_match
= compparms (p1
, p2
);
932 else if (TREE_CODE (newdecl
) == TEMPLATE_DECL
)
934 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
))
935 != TREE_CODE (DECL_TEMPLATE_RESULT (olddecl
)))
938 if (!comp_template_parms (DECL_TEMPLATE_PARMS (newdecl
),
939 DECL_TEMPLATE_PARMS (olddecl
)))
942 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) == TYPE_DECL
)
943 types_match
= same_type_p (TREE_TYPE (DECL_TEMPLATE_RESULT (olddecl
)),
944 TREE_TYPE (DECL_TEMPLATE_RESULT (newdecl
)));
946 types_match
= decls_match (DECL_TEMPLATE_RESULT (olddecl
),
947 DECL_TEMPLATE_RESULT (newdecl
));
951 if (TREE_TYPE (newdecl
) == error_mark_node
)
952 types_match
= TREE_TYPE (olddecl
) == error_mark_node
;
953 else if (TREE_TYPE (olddecl
) == NULL_TREE
)
954 types_match
= TREE_TYPE (newdecl
) == NULL_TREE
;
955 else if (TREE_TYPE (newdecl
) == NULL_TREE
)
958 types_match
= comptypes (TREE_TYPE (newdecl
),
960 COMPARE_REDECLARATION
);
966 /* If NEWDECL is `static' and an `extern' was seen previously,
967 warn about it. OLDDECL is the previous declaration.
969 Note that this does not apply to the C++ case of declaring
970 a variable `extern const' and then later `const'.
972 Don't complain about built-in functions, since they are beyond
973 the user's control. */
976 warn_extern_redeclared_static (tree newdecl
, tree olddecl
)
980 if (TREE_CODE (newdecl
) == TYPE_DECL
981 || TREE_CODE (newdecl
) == TEMPLATE_DECL
982 || TREE_CODE (newdecl
) == CONST_DECL
983 || TREE_CODE (newdecl
) == NAMESPACE_DECL
)
986 /* Don't get confused by static member functions; that's a different
988 if (TREE_CODE (newdecl
) == FUNCTION_DECL
989 && DECL_STATIC_FUNCTION_P (newdecl
))
992 /* If the old declaration was `static', or the new one isn't, then
993 then everything is OK. */
994 if (DECL_THIS_STATIC (olddecl
) || !DECL_THIS_STATIC (newdecl
))
997 /* It's OK to declare a builtin function as `static'. */
998 if (TREE_CODE (olddecl
) == FUNCTION_DECL
999 && DECL_ARTIFICIAL (olddecl
))
1002 name
= DECL_ASSEMBLER_NAME (newdecl
);
1003 pedwarn ("%qD was declared %<extern%> and later %<static%>", newdecl
);
1004 cp_pedwarn_at ("previous declaration of %qD", olddecl
);
1007 /* If NEWDECL is a redeclaration of OLDDECL, merge the declarations.
1008 If the redeclaration is invalid, a diagnostic is issued, and the
1009 error_mark_node is returned. Otherwise, OLDDECL is returned.
1011 If NEWDECL is not a redeclaration of OLDDECL, NULL_TREE is
1015 duplicate_decls (tree newdecl
, tree olddecl
)
1017 unsigned olddecl_uid
= DECL_UID (olddecl
);
1018 int olddecl_friend
= 0, types_match
= 0;
1019 int new_defines_function
= 0;
1021 if (newdecl
== olddecl
)
1024 types_match
= decls_match (newdecl
, olddecl
);
1026 /* If either the type of the new decl or the type of the old decl is an
1027 error_mark_node, then that implies that we have already issued an
1028 error (earlier) for some bogus type specification, and in that case,
1029 it is rather pointless to harass the user with yet more error message
1030 about the same declaration, so just pretend the types match here. */
1031 if (TREE_TYPE (newdecl
) == error_mark_node
1032 || TREE_TYPE (olddecl
) == error_mark_node
)
1035 if (DECL_P (olddecl
)
1036 && TREE_CODE (newdecl
) == FUNCTION_DECL
1037 && TREE_CODE (olddecl
) == FUNCTION_DECL
1038 && (DECL_UNINLINABLE (newdecl
) || DECL_UNINLINABLE (olddecl
)))
1040 if (DECL_DECLARED_INLINE_P (newdecl
)
1041 && DECL_UNINLINABLE (newdecl
)
1042 && lookup_attribute ("noinline", DECL_ATTRIBUTES (newdecl
)))
1043 /* Already warned elsewhere. */;
1044 else if (DECL_DECLARED_INLINE_P (olddecl
)
1045 && DECL_UNINLINABLE (olddecl
)
1046 && lookup_attribute ("noinline", DECL_ATTRIBUTES (olddecl
)))
1047 /* Already warned. */;
1048 else if (DECL_DECLARED_INLINE_P (newdecl
)
1049 && DECL_UNINLINABLE (olddecl
)
1050 && lookup_attribute ("noinline", DECL_ATTRIBUTES (olddecl
)))
1052 warning ("%Jfunction %qD redeclared as inline", newdecl
, newdecl
);
1053 warning ("%Jprevious declaration of %qD with attribute noinline",
1056 else if (DECL_DECLARED_INLINE_P (olddecl
)
1057 && DECL_UNINLINABLE (newdecl
)
1058 && lookup_attribute ("noinline", DECL_ATTRIBUTES (newdecl
)))
1060 warning ("%Jfunction %qD redeclared with attribute noinline",
1062 warning ("%Jprevious declaration of %qD was inline",
1067 /* Check for redeclaration and other discrepancies. */
1068 if (TREE_CODE (olddecl
) == FUNCTION_DECL
1069 && DECL_ARTIFICIAL (olddecl
))
1071 if (TREE_CODE (newdecl
) != FUNCTION_DECL
)
1073 /* Avoid warnings redeclaring anticipated built-ins. */
1074 if (DECL_ANTICIPATED (olddecl
))
1077 /* If you declare a built-in or predefined function name as static,
1078 the old definition is overridden, but optionally warn this was a
1079 bad choice of name. */
1080 if (! TREE_PUBLIC (newdecl
))
1083 warning ("shadowing %s function %q#D",
1084 DECL_BUILT_IN (olddecl
) ? "built-in" : "library",
1086 /* Discard the old built-in function. */
1089 /* If the built-in is not ansi, then programs can override
1090 it even globally without an error. */
1091 else if (! DECL_BUILT_IN (olddecl
))
1092 warning ("library function %q#D redeclared as non-function %q#D",
1096 error ("declaration of %q#D", newdecl
);
1097 error ("conflicts with built-in declaration %q#D",
1102 else if (!types_match
)
1104 /* Avoid warnings redeclaring anticipated built-ins. */
1105 if (DECL_ANTICIPATED (olddecl
))
1107 /* Deal with fileptr_type_node. FILE type is not known
1108 at the time we create the builtins. */
1111 for (t1
= TYPE_ARG_TYPES (TREE_TYPE (newdecl
)),
1112 t2
= TYPE_ARG_TYPES (TREE_TYPE (olddecl
));
1114 t1
= TREE_CHAIN (t1
), t2
= TREE_CHAIN (t2
))
1117 else if (TREE_VALUE (t2
) == fileptr_type_node
)
1119 tree t
= TREE_VALUE (t1
);
1121 if (TREE_CODE (t
) == POINTER_TYPE
1122 && TYPE_NAME (TREE_TYPE (t
))
1123 && DECL_NAME (TYPE_NAME (TREE_TYPE (t
)))
1124 == get_identifier ("FILE")
1125 && compparms (TREE_CHAIN (t1
), TREE_CHAIN (t2
)))
1127 tree oldargs
= TYPE_ARG_TYPES (TREE_TYPE (olddecl
));
1129 TYPE_ARG_TYPES (TREE_TYPE (olddecl
))
1130 = TYPE_ARG_TYPES (TREE_TYPE (newdecl
));
1131 types_match
= decls_match (newdecl
, olddecl
);
1133 return duplicate_decls (newdecl
, olddecl
);
1134 TYPE_ARG_TYPES (TREE_TYPE (olddecl
)) = oldargs
;
1137 else if (! same_type_p (TREE_VALUE (t1
), TREE_VALUE (t2
)))
1140 else if ((DECL_EXTERN_C_P (newdecl
)
1141 && DECL_EXTERN_C_P (olddecl
))
1142 || compparms (TYPE_ARG_TYPES (TREE_TYPE (newdecl
)),
1143 TYPE_ARG_TYPES (TREE_TYPE (olddecl
))))
1145 /* A near match; override the builtin. */
1147 if (TREE_PUBLIC (newdecl
))
1149 warning ("new declaration %q#D", newdecl
);
1150 warning ("ambiguates built-in declaration %q#D",
1153 else if (warn_shadow
)
1154 warning ("shadowing %s function %q#D",
1155 DECL_BUILT_IN (olddecl
) ? "built-in" : "library",
1159 /* Discard the old built-in function. */
1162 /* Replace the old RTL to avoid problems with inlining. */
1163 COPY_DECL_RTL (newdecl
, olddecl
);
1165 /* Even if the types match, prefer the new declarations type
1166 for anticipated built-ins, for exception lists, etc... */
1167 else if (DECL_ANTICIPATED (olddecl
))
1169 tree type
= TREE_TYPE (newdecl
);
1170 tree attribs
= (*targetm
.merge_type_attributes
)
1171 (TREE_TYPE (olddecl
), type
);
1173 type
= cp_build_type_attribute_variant (type
, attribs
);
1174 TREE_TYPE (newdecl
) = TREE_TYPE (olddecl
) = type
;
1177 /* Whether or not the builtin can throw exceptions has no
1178 bearing on this declarator. */
1179 TREE_NOTHROW (olddecl
) = 0;
1181 if (DECL_THIS_STATIC (newdecl
) && !DECL_THIS_STATIC (olddecl
))
1183 /* If a builtin function is redeclared as `static', merge
1184 the declarations, but make the original one static. */
1185 DECL_THIS_STATIC (olddecl
) = 1;
1186 TREE_PUBLIC (olddecl
) = 0;
1188 /* Make the old declaration consistent with the new one so
1189 that all remnants of the builtin-ness of this function
1190 will be banished. */
1191 SET_DECL_LANGUAGE (olddecl
, DECL_LANGUAGE (newdecl
));
1192 COPY_DECL_RTL (newdecl
, olddecl
);
1195 else if (TREE_CODE (olddecl
) != TREE_CODE (newdecl
))
1197 if ((TREE_CODE (olddecl
) == TYPE_DECL
&& DECL_ARTIFICIAL (olddecl
)
1198 && TREE_CODE (newdecl
) != TYPE_DECL
1199 && ! (TREE_CODE (newdecl
) == TEMPLATE_DECL
1200 && TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) == TYPE_DECL
))
1201 || (TREE_CODE (newdecl
) == TYPE_DECL
&& DECL_ARTIFICIAL (newdecl
)
1202 && TREE_CODE (olddecl
) != TYPE_DECL
1203 && ! (TREE_CODE (olddecl
) == TEMPLATE_DECL
1204 && (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl
))
1207 /* We do nothing special here, because C++ does such nasty
1208 things with TYPE_DECLs. Instead, just let the TYPE_DECL
1209 get shadowed, and know that if we need to find a TYPE_DECL
1210 for a given name, we can look in the IDENTIFIER_TYPE_VALUE
1211 slot of the identifier. */
1215 if ((TREE_CODE (newdecl
) == FUNCTION_DECL
1216 && DECL_FUNCTION_TEMPLATE_P (olddecl
))
1217 || (TREE_CODE (olddecl
) == FUNCTION_DECL
1218 && DECL_FUNCTION_TEMPLATE_P (newdecl
)))
1221 error ("%q#D redeclared as different kind of symbol", newdecl
);
1222 if (TREE_CODE (olddecl
) == TREE_LIST
)
1223 olddecl
= TREE_VALUE (olddecl
);
1224 cp_error_at ("previous declaration of %q#D", olddecl
);
1226 return error_mark_node
;
1228 else if (!types_match
)
1230 if (CP_DECL_CONTEXT (newdecl
) != CP_DECL_CONTEXT (olddecl
))
1231 /* These are certainly not duplicate declarations; they're
1232 from different scopes. */
1235 if (TREE_CODE (newdecl
) == TEMPLATE_DECL
)
1237 /* The name of a class template may not be declared to refer to
1238 any other template, class, function, object, namespace, value,
1239 or type in the same scope. */
1240 if (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl
)) == TYPE_DECL
1241 || TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) == TYPE_DECL
)
1243 error ("declaration of template %q#D", newdecl
);
1244 cp_error_at ("conflicts with previous declaration %q#D",
1247 else if (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl
)) == FUNCTION_DECL
1248 && TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) == FUNCTION_DECL
1249 && compparms (TYPE_ARG_TYPES (TREE_TYPE (DECL_TEMPLATE_RESULT (olddecl
))),
1250 TYPE_ARG_TYPES (TREE_TYPE (DECL_TEMPLATE_RESULT (newdecl
))))
1251 && comp_template_parms (DECL_TEMPLATE_PARMS (newdecl
),
1252 DECL_TEMPLATE_PARMS (olddecl
))
1253 /* Template functions can be disambiguated by
1255 && same_type_p (TREE_TYPE (TREE_TYPE (newdecl
)),
1256 TREE_TYPE (TREE_TYPE (olddecl
))))
1258 error ("new declaration %q#D", newdecl
);
1259 cp_error_at ("ambiguates old declaration %q#D", olddecl
);
1263 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1265 if (DECL_EXTERN_C_P (newdecl
) && DECL_EXTERN_C_P (olddecl
))
1267 error ("declaration of C function %q#D conflicts with",
1269 cp_error_at ("previous declaration %q#D here", olddecl
);
1271 else if (compparms (TYPE_ARG_TYPES (TREE_TYPE (newdecl
)),
1272 TYPE_ARG_TYPES (TREE_TYPE (olddecl
))))
1274 error ("new declaration %q#D", newdecl
);
1275 cp_error_at ("ambiguates old declaration %q#D", olddecl
);
1282 error ("conflicting declaration %q#D", newdecl
);
1283 cp_error_at ("%qD has a previous declaration as %q#D",
1285 return error_mark_node
;
1288 else if (TREE_CODE (newdecl
) == FUNCTION_DECL
1289 && ((DECL_TEMPLATE_SPECIALIZATION (olddecl
)
1290 && (!DECL_TEMPLATE_INFO (newdecl
)
1291 || (DECL_TI_TEMPLATE (newdecl
)
1292 != DECL_TI_TEMPLATE (olddecl
))))
1293 || (DECL_TEMPLATE_SPECIALIZATION (newdecl
)
1294 && (!DECL_TEMPLATE_INFO (olddecl
)
1295 || (DECL_TI_TEMPLATE (olddecl
)
1296 != DECL_TI_TEMPLATE (newdecl
))))))
1297 /* It's OK to have a template specialization and a non-template
1298 with the same type, or to have specializations of two
1299 different templates with the same type. Note that if one is a
1300 specialization, and the other is an instantiation of the same
1301 template, that we do not exit at this point. That situation
1302 can occur if we instantiate a template class, and then
1303 specialize one of its methods. This situation is valid, but
1304 the declarations must be merged in the usual way. */
1306 else if (TREE_CODE (newdecl
) == FUNCTION_DECL
1307 && ((DECL_TEMPLATE_INSTANTIATION (olddecl
)
1308 && !DECL_USE_TEMPLATE (newdecl
))
1309 || (DECL_TEMPLATE_INSTANTIATION (newdecl
)
1310 && !DECL_USE_TEMPLATE (olddecl
))))
1311 /* One of the declarations is a template instantiation, and the
1312 other is not a template at all. That's OK. */
1314 else if (TREE_CODE (newdecl
) == NAMESPACE_DECL
)
1316 /* In [namespace.alias] we have:
1318 In a declarative region, a namespace-alias-definition can be
1319 used to redefine a namespace-alias declared in that declarative
1320 region to refer only to the namespace to which it already
1323 Therefore, if we encounter a second alias directive for the same
1324 alias, we can just ignore the second directive. */
1325 if (DECL_NAMESPACE_ALIAS (newdecl
)
1326 && (DECL_NAMESPACE_ALIAS (newdecl
)
1327 == DECL_NAMESPACE_ALIAS (olddecl
)))
1329 /* [namespace.alias]
1331 A namespace-name or namespace-alias shall not be declared as
1332 the name of any other entity in the same declarative region.
1333 A namespace-name defined at global scope shall not be
1334 declared as the name of any other entity in any global scope
1336 error ("declaration of namespace %qD conflicts with", newdecl
);
1337 cp_error_at ("previous declaration of namespace %qD here", olddecl
);
1338 return error_mark_node
;
1342 const char *errmsg
= redeclaration_error_message (newdecl
, olddecl
);
1345 error (errmsg
, newdecl
);
1346 if (DECL_NAME (olddecl
) != NULL_TREE
)
1347 cp_error_at ((DECL_INITIAL (olddecl
)
1348 && namespace_bindings_p ())
1349 ? "%q#D previously defined here"
1350 : "%q#D previously declared here", olddecl
);
1351 return error_mark_node
;
1353 else if (TREE_CODE (olddecl
) == FUNCTION_DECL
1354 && DECL_INITIAL (olddecl
) != NULL_TREE
1355 && TYPE_ARG_TYPES (TREE_TYPE (olddecl
)) == NULL_TREE
1356 && TYPE_ARG_TYPES (TREE_TYPE (newdecl
)) != NULL_TREE
)
1358 /* Prototype decl follows defn w/o prototype. */
1359 cp_warning_at ("prototype for %q#D", newdecl
);
1360 warning ("%Jfollows non-prototype definition here", olddecl
);
1362 else if (TREE_CODE (olddecl
) == FUNCTION_DECL
1363 && DECL_LANGUAGE (newdecl
) != DECL_LANGUAGE (olddecl
))
1365 /* extern "C" int foo ();
1366 int foo () { bar (); }
1368 if (current_lang_depth () == 0)
1369 SET_DECL_LANGUAGE (newdecl
, DECL_LANGUAGE (olddecl
));
1372 cp_error_at ("previous declaration of %q#D with %qL linkage",
1373 olddecl
, DECL_LANGUAGE (olddecl
));
1374 error ("conflicts with new declaration with %qL linkage",
1375 DECL_LANGUAGE (newdecl
));
1379 if (DECL_LANG_SPECIFIC (olddecl
) && DECL_USE_TEMPLATE (olddecl
))
1381 else if (TREE_CODE (olddecl
) == FUNCTION_DECL
)
1383 tree t1
= TYPE_ARG_TYPES (TREE_TYPE (olddecl
));
1384 tree t2
= TYPE_ARG_TYPES (TREE_TYPE (newdecl
));
1387 if (TREE_CODE (TREE_TYPE (newdecl
)) == METHOD_TYPE
)
1388 t1
= TREE_CHAIN (t1
), t2
= TREE_CHAIN (t2
);
1390 for (; t1
&& t1
!= void_list_node
;
1391 t1
= TREE_CHAIN (t1
), t2
= TREE_CHAIN (t2
), i
++)
1392 if (TREE_PURPOSE (t1
) && TREE_PURPOSE (t2
))
1394 if (1 == simple_cst_equal (TREE_PURPOSE (t1
),
1397 pedwarn ("default argument given for parameter %d of %q#D",
1399 cp_pedwarn_at ("after previous specification in %q#D",
1404 error ("default argument given for parameter %d of %q#D",
1406 cp_error_at ("after previous specification in %q#D",
1411 if (DECL_DECLARED_INLINE_P (newdecl
)
1412 && ! DECL_DECLARED_INLINE_P (olddecl
)
1413 && TREE_ADDRESSABLE (olddecl
) && warn_inline
)
1415 warning ("%q#D was used before it was declared inline", newdecl
);
1416 warning ("%Jprevious non-inline declaration here", olddecl
);
1421 /* Do not merge an implicit typedef with an explicit one. In:
1425 typedef class A A __attribute__ ((foo));
1427 the attribute should apply only to the typedef. */
1428 if (TREE_CODE (olddecl
) == TYPE_DECL
1429 && (DECL_IMPLICIT_TYPEDEF_P (olddecl
)
1430 || DECL_IMPLICIT_TYPEDEF_P (newdecl
)))
1433 /* If new decl is `static' and an `extern' was seen previously,
1435 warn_extern_redeclared_static (newdecl
, olddecl
);
1437 /* We have committed to returning 1 at this point. */
1438 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1440 /* Now that functions must hold information normally held
1441 by field decls, there is extra work to do so that
1442 declaration information does not get destroyed during
1444 if (DECL_VINDEX (olddecl
))
1445 DECL_VINDEX (newdecl
) = DECL_VINDEX (olddecl
);
1446 if (DECL_CONTEXT (olddecl
))
1447 DECL_CONTEXT (newdecl
) = DECL_CONTEXT (olddecl
);
1448 DECL_STATIC_CONSTRUCTOR (newdecl
) |= DECL_STATIC_CONSTRUCTOR (olddecl
);
1449 DECL_STATIC_DESTRUCTOR (newdecl
) |= DECL_STATIC_DESTRUCTOR (olddecl
);
1450 DECL_PURE_VIRTUAL_P (newdecl
) |= DECL_PURE_VIRTUAL_P (olddecl
);
1451 DECL_VIRTUAL_P (newdecl
) |= DECL_VIRTUAL_P (olddecl
);
1452 DECL_THIS_STATIC (newdecl
) |= DECL_THIS_STATIC (olddecl
);
1453 if (DECL_OVERLOADED_OPERATOR_P (olddecl
) != ERROR_MARK
)
1454 SET_OVERLOADED_OPERATOR_CODE
1455 (newdecl
, DECL_OVERLOADED_OPERATOR_P (olddecl
));
1456 new_defines_function
= DECL_INITIAL (newdecl
) != NULL_TREE
;
1458 /* Optionally warn about more than one declaration for the same
1459 name, but don't warn about a function declaration followed by a
1461 if (warn_redundant_decls
&& ! DECL_ARTIFICIAL (olddecl
)
1462 && !(new_defines_function
&& DECL_INITIAL (olddecl
) == NULL_TREE
)
1463 /* Don't warn about extern decl followed by definition. */
1464 && !(DECL_EXTERNAL (olddecl
) && ! DECL_EXTERNAL (newdecl
))
1465 /* Don't warn about friends, let add_friend take care of it. */
1466 && ! (DECL_FRIEND_P (newdecl
) || DECL_FRIEND_P (olddecl
)))
1468 warning ("redundant redeclaration of %qD in same scope", newdecl
);
1469 cp_warning_at ("previous declaration of %qD", olddecl
);
1473 /* Deal with C++: must preserve virtual function table size. */
1474 if (TREE_CODE (olddecl
) == TYPE_DECL
)
1476 tree newtype
= TREE_TYPE (newdecl
);
1477 tree oldtype
= TREE_TYPE (olddecl
);
1479 if (newtype
!= error_mark_node
&& oldtype
!= error_mark_node
1480 && TYPE_LANG_SPECIFIC (newtype
) && TYPE_LANG_SPECIFIC (oldtype
))
1481 CLASSTYPE_FRIEND_CLASSES (newtype
)
1482 = CLASSTYPE_FRIEND_CLASSES (oldtype
);
1484 DECL_ORIGINAL_TYPE (newdecl
) = DECL_ORIGINAL_TYPE (olddecl
);
1487 /* Copy all the DECL_... slots specified in the new decl
1488 except for any that we copy here from the old type. */
1489 DECL_ATTRIBUTES (newdecl
)
1490 = (*targetm
.merge_decl_attributes
) (olddecl
, newdecl
);
1492 if (TREE_CODE (newdecl
) == TEMPLATE_DECL
)
1494 TREE_TYPE (olddecl
) = TREE_TYPE (DECL_TEMPLATE_RESULT (olddecl
));
1495 DECL_TEMPLATE_SPECIALIZATIONS (olddecl
)
1496 = chainon (DECL_TEMPLATE_SPECIALIZATIONS (olddecl
),
1497 DECL_TEMPLATE_SPECIALIZATIONS (newdecl
));
1499 /* If the new declaration is a definition, update the file and
1500 line information on the declaration. */
1501 if (DECL_INITIAL (DECL_TEMPLATE_RESULT (olddecl
)) == NULL_TREE
1502 && DECL_INITIAL (DECL_TEMPLATE_RESULT (newdecl
)) != NULL_TREE
)
1504 DECL_SOURCE_LOCATION (olddecl
)
1505 = DECL_SOURCE_LOCATION (DECL_TEMPLATE_RESULT (olddecl
))
1506 = DECL_SOURCE_LOCATION (newdecl
);
1507 if (DECL_FUNCTION_TEMPLATE_P (newdecl
))
1508 DECL_ARGUMENTS (DECL_TEMPLATE_RESULT (olddecl
))
1509 = DECL_ARGUMENTS (DECL_TEMPLATE_RESULT (newdecl
));
1512 if (DECL_FUNCTION_TEMPLATE_P (newdecl
))
1514 DECL_INLINE (DECL_TEMPLATE_RESULT (olddecl
))
1515 |= DECL_INLINE (DECL_TEMPLATE_RESULT (newdecl
));
1516 DECL_DECLARED_INLINE_P (DECL_TEMPLATE_RESULT (olddecl
))
1517 |= DECL_DECLARED_INLINE_P (DECL_TEMPLATE_RESULT (newdecl
));
1525 /* Automatically handles default parameters. */
1526 tree oldtype
= TREE_TYPE (olddecl
);
1529 /* Merge the data types specified in the two decls. */
1530 newtype
= merge_types (TREE_TYPE (newdecl
), TREE_TYPE (olddecl
));
1532 /* If merge_types produces a non-typedef type, just use the old type. */
1533 if (TREE_CODE (newdecl
) == TYPE_DECL
1534 && newtype
== DECL_ORIGINAL_TYPE (newdecl
))
1537 if (TREE_CODE (newdecl
) == VAR_DECL
)
1539 DECL_THIS_EXTERN (newdecl
) |= DECL_THIS_EXTERN (olddecl
);
1540 DECL_INITIALIZED_P (newdecl
) |= DECL_INITIALIZED_P (olddecl
);
1541 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (newdecl
)
1542 |= DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (olddecl
);
1545 /* Do this after calling `merge_types' so that default
1546 parameters don't confuse us. */
1547 else if (TREE_CODE (newdecl
) == FUNCTION_DECL
1548 && (TYPE_RAISES_EXCEPTIONS (TREE_TYPE (newdecl
))
1549 != TYPE_RAISES_EXCEPTIONS (TREE_TYPE (olddecl
))))
1551 TREE_TYPE (newdecl
) = build_exception_variant (newtype
,
1552 TYPE_RAISES_EXCEPTIONS (TREE_TYPE (newdecl
)));
1553 TREE_TYPE (olddecl
) = build_exception_variant (newtype
,
1554 TYPE_RAISES_EXCEPTIONS (oldtype
));
1556 if ((pedantic
|| ! DECL_IN_SYSTEM_HEADER (olddecl
))
1557 && ! DECL_IS_BUILTIN (olddecl
)
1559 && !comp_except_specs (TYPE_RAISES_EXCEPTIONS (TREE_TYPE (newdecl
)),
1560 TYPE_RAISES_EXCEPTIONS (TREE_TYPE (olddecl
)), 1))
1562 error ("declaration of %qF throws different exceptions",
1564 cp_error_at ("than previous declaration %qF", olddecl
);
1567 TREE_TYPE (newdecl
) = TREE_TYPE (olddecl
) = newtype
;
1569 /* Lay the type out, unless already done. */
1570 if (! same_type_p (newtype
, oldtype
)
1571 && TREE_TYPE (newdecl
) != error_mark_node
1572 && !(processing_template_decl
&& uses_template_parms (newdecl
)))
1573 layout_type (TREE_TYPE (newdecl
));
1575 if ((TREE_CODE (newdecl
) == VAR_DECL
1576 || TREE_CODE (newdecl
) == PARM_DECL
1577 || TREE_CODE (newdecl
) == RESULT_DECL
1578 || TREE_CODE (newdecl
) == FIELD_DECL
1579 || TREE_CODE (newdecl
) == TYPE_DECL
)
1580 && !(processing_template_decl
&& uses_template_parms (newdecl
)))
1581 layout_decl (newdecl
, 0);
1583 /* Merge the type qualifiers. */
1584 if (TREE_READONLY (newdecl
))
1585 TREE_READONLY (olddecl
) = 1;
1586 if (TREE_THIS_VOLATILE (newdecl
))
1587 TREE_THIS_VOLATILE (olddecl
) = 1;
1588 if (TREE_NOTHROW (newdecl
))
1589 TREE_NOTHROW (olddecl
) = 1;
1591 /* Merge deprecatedness. */
1592 if (TREE_DEPRECATED (newdecl
))
1593 TREE_DEPRECATED (olddecl
) = 1;
1595 /* Merge the initialization information. */
1596 if (DECL_INITIAL (newdecl
) == NULL_TREE
1597 && DECL_INITIAL (olddecl
) != NULL_TREE
)
1599 DECL_INITIAL (newdecl
) = DECL_INITIAL (olddecl
);
1600 DECL_SOURCE_LOCATION (newdecl
) = DECL_SOURCE_LOCATION (olddecl
);
1601 if (CAN_HAVE_FULL_LANG_DECL_P (newdecl
)
1602 && DECL_LANG_SPECIFIC (newdecl
)
1603 && DECL_LANG_SPECIFIC (olddecl
))
1605 DECL_SAVED_TREE (newdecl
) = DECL_SAVED_TREE (olddecl
);
1606 DECL_STRUCT_FUNCTION (newdecl
) = DECL_STRUCT_FUNCTION (olddecl
);
1610 /* Merge the section attribute.
1611 We want to issue an error if the sections conflict but that must be
1612 done later in decl_attributes since we are called before attributes
1614 if (DECL_SECTION_NAME (newdecl
) == NULL_TREE
)
1615 DECL_SECTION_NAME (newdecl
) = DECL_SECTION_NAME (olddecl
);
1617 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1619 DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (newdecl
)
1620 |= DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (olddecl
);
1621 DECL_NO_LIMIT_STACK (newdecl
) |= DECL_NO_LIMIT_STACK (olddecl
);
1622 TREE_THIS_VOLATILE (newdecl
) |= TREE_THIS_VOLATILE (olddecl
);
1623 TREE_READONLY (newdecl
) |= TREE_READONLY (olddecl
);
1624 TREE_NOTHROW (newdecl
) |= TREE_NOTHROW (olddecl
);
1625 DECL_IS_MALLOC (newdecl
) |= DECL_IS_MALLOC (olddecl
);
1626 DECL_IS_PURE (newdecl
) |= DECL_IS_PURE (olddecl
);
1627 /* Keep the old RTL. */
1628 COPY_DECL_RTL (olddecl
, newdecl
);
1630 else if (TREE_CODE (newdecl
) == VAR_DECL
1631 && (DECL_SIZE (olddecl
) || !DECL_SIZE (newdecl
)))
1633 /* Keep the old RTL. We cannot keep the old RTL if the old
1634 declaration was for an incomplete object and the new
1635 declaration is not since many attributes of the RTL will
1637 COPY_DECL_RTL (olddecl
, newdecl
);
1640 /* If cannot merge, then use the new type and qualifiers,
1641 and don't preserve the old rtl. */
1644 /* Clean out any memory we had of the old declaration. */
1645 tree oldstatic
= value_member (olddecl
, static_aggregates
);
1647 TREE_VALUE (oldstatic
) = error_mark_node
;
1649 TREE_TYPE (olddecl
) = TREE_TYPE (newdecl
);
1650 TREE_READONLY (olddecl
) = TREE_READONLY (newdecl
);
1651 TREE_THIS_VOLATILE (olddecl
) = TREE_THIS_VOLATILE (newdecl
);
1652 TREE_SIDE_EFFECTS (olddecl
) = TREE_SIDE_EFFECTS (newdecl
);
1655 /* Merge the storage class information. */
1656 merge_weak (newdecl
, olddecl
);
1658 DECL_ONE_ONLY (newdecl
) |= DECL_ONE_ONLY (olddecl
);
1659 DECL_DEFER_OUTPUT (newdecl
) |= DECL_DEFER_OUTPUT (olddecl
);
1660 TREE_PUBLIC (newdecl
) = TREE_PUBLIC (olddecl
);
1661 TREE_STATIC (olddecl
) = TREE_STATIC (newdecl
) |= TREE_STATIC (olddecl
);
1662 if (! DECL_EXTERNAL (olddecl
))
1663 DECL_EXTERNAL (newdecl
) = 0;
1665 if (DECL_LANG_SPECIFIC (newdecl
) && DECL_LANG_SPECIFIC (olddecl
))
1667 DECL_INTERFACE_KNOWN (newdecl
) |= DECL_INTERFACE_KNOWN (olddecl
);
1668 DECL_NOT_REALLY_EXTERN (newdecl
) |= DECL_NOT_REALLY_EXTERN (olddecl
);
1669 DECL_COMDAT (newdecl
) |= DECL_COMDAT (olddecl
);
1670 DECL_TEMPLATE_INSTANTIATED (newdecl
)
1671 |= DECL_TEMPLATE_INSTANTIATED (olddecl
);
1672 /* If the OLDDECL is an implicit instantiation, then the NEWDECL
1673 must be too. But, it may not yet be marked as such if the
1674 caller has created NEWDECL, but has not yet figured out that
1675 it is a redeclaration. */
1676 if (DECL_IMPLICIT_INSTANTIATION (olddecl
)
1677 && !DECL_USE_TEMPLATE (newdecl
))
1678 SET_DECL_IMPLICIT_INSTANTIATION (newdecl
);
1679 /* Don't really know how much of the language-specific
1680 values we should copy from old to new. */
1681 DECL_IN_AGGR_P (newdecl
) = DECL_IN_AGGR_P (olddecl
);
1682 DECL_LANG_SPECIFIC (newdecl
)->decl_flags
.u2
=
1683 DECL_LANG_SPECIFIC (olddecl
)->decl_flags
.u2
;
1684 DECL_NONCONVERTING_P (newdecl
) = DECL_NONCONVERTING_P (olddecl
);
1685 DECL_REPO_AVAILABLE_P (newdecl
) = DECL_REPO_AVAILABLE_P (olddecl
);
1686 DECL_TEMPLATE_INFO (newdecl
) = DECL_TEMPLATE_INFO (olddecl
);
1687 DECL_INITIALIZED_IN_CLASS_P (newdecl
)
1688 |= DECL_INITIALIZED_IN_CLASS_P (olddecl
);
1689 olddecl_friend
= DECL_FRIEND_P (olddecl
);
1691 /* Only functions have DECL_BEFRIENDING_CLASSES. */
1692 if (TREE_CODE (newdecl
) == FUNCTION_DECL
1693 || DECL_FUNCTION_TEMPLATE_P (newdecl
))
1695 DECL_BEFRIENDING_CLASSES (newdecl
)
1696 = chainon (DECL_BEFRIENDING_CLASSES (newdecl
),
1697 DECL_BEFRIENDING_CLASSES (olddecl
));
1698 /* DECL_THUNKS is only valid for virtual functions,
1699 otherwise it is a DECL_FRIEND_CONTEXT. */
1700 if (DECL_VIRTUAL_P (newdecl
))
1701 DECL_THUNKS (newdecl
) = DECL_THUNKS (olddecl
);
1705 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1707 if (DECL_TEMPLATE_INSTANTIATION (olddecl
)
1708 && !DECL_TEMPLATE_INSTANTIATION (newdecl
))
1710 /* If newdecl is not a specialization, then it is not a
1711 template-related function at all. And that means that we
1712 should have exited above, returning 0. */
1713 gcc_assert (DECL_TEMPLATE_SPECIALIZATION (newdecl
));
1715 if (TREE_USED (olddecl
))
1716 /* From [temp.expl.spec]:
1718 If a template, a member template or the member of a class
1719 template is explicitly specialized then that
1720 specialization shall be declared before the first use of
1721 that specialization that would cause an implicit
1722 instantiation to take place, in every translation unit in
1723 which such a use occurs. */
1724 error ("explicit specialization of %qD after first use",
1727 SET_DECL_TEMPLATE_SPECIALIZATION (olddecl
);
1729 /* [temp.expl.spec/14] We don't inline explicit specialization
1730 just because the primary template says so. */
1734 if (DECL_PENDING_INLINE_INFO (newdecl
) == 0)
1735 DECL_PENDING_INLINE_INFO (newdecl
) = DECL_PENDING_INLINE_INFO (olddecl
);
1737 DECL_DECLARED_INLINE_P (newdecl
) |= DECL_DECLARED_INLINE_P (olddecl
);
1739 /* If either decl says `inline', this fn is inline, unless
1740 its definition was passed already. */
1741 if (DECL_INLINE (newdecl
) && DECL_INITIAL (olddecl
) == NULL_TREE
)
1742 DECL_INLINE (olddecl
) = 1;
1743 DECL_INLINE (newdecl
) = DECL_INLINE (olddecl
);
1745 DECL_UNINLINABLE (newdecl
) = DECL_UNINLINABLE (olddecl
)
1746 = (DECL_UNINLINABLE (newdecl
) || DECL_UNINLINABLE (olddecl
));
1749 /* Preserve abstractness on cloned [cd]tors. */
1750 DECL_ABSTRACT (newdecl
) = DECL_ABSTRACT (olddecl
);
1754 SET_DECL_LANGUAGE (olddecl
, DECL_LANGUAGE (newdecl
));
1755 COPY_DECL_ASSEMBLER_NAME (newdecl
, olddecl
);
1756 COPY_DECL_RTL (newdecl
, olddecl
);
1758 if (! types_match
|| new_defines_function
)
1760 /* These need to be copied so that the names are available.
1761 Note that if the types do match, we'll preserve inline
1762 info and other bits, but if not, we won't. */
1763 DECL_ARGUMENTS (olddecl
) = DECL_ARGUMENTS (newdecl
);
1764 DECL_RESULT (olddecl
) = DECL_RESULT (newdecl
);
1766 if (new_defines_function
)
1767 /* If defining a function declared with other language
1768 linkage, use the previously declared language linkage. */
1769 SET_DECL_LANGUAGE (newdecl
, DECL_LANGUAGE (olddecl
));
1770 else if (types_match
)
1772 /* If redeclaring a builtin function, and not a definition,
1773 it stays built in. */
1774 if (DECL_BUILT_IN (olddecl
))
1776 DECL_BUILT_IN_CLASS (newdecl
) = DECL_BUILT_IN_CLASS (olddecl
);
1777 DECL_FUNCTION_CODE (newdecl
) = DECL_FUNCTION_CODE (olddecl
);
1778 /* If we're keeping the built-in definition, keep the rtl,
1779 regardless of declaration matches. */
1780 COPY_DECL_RTL (olddecl
, newdecl
);
1783 DECL_RESULT (newdecl
) = DECL_RESULT (olddecl
);
1784 /* Don't clear out the arguments if we're redefining a function. */
1785 if (DECL_ARGUMENTS (olddecl
))
1786 DECL_ARGUMENTS (newdecl
) = DECL_ARGUMENTS (olddecl
);
1789 else if (TREE_CODE (newdecl
) == NAMESPACE_DECL
)
1790 NAMESPACE_LEVEL (newdecl
) = NAMESPACE_LEVEL (olddecl
);
1792 /* Now preserve various other info from the definition. */
1793 TREE_ADDRESSABLE (newdecl
) = TREE_ADDRESSABLE (olddecl
);
1794 TREE_ASM_WRITTEN (newdecl
) = TREE_ASM_WRITTEN (olddecl
);
1795 DECL_COMMON (newdecl
) = DECL_COMMON (olddecl
);
1796 COPY_DECL_ASSEMBLER_NAME (olddecl
, newdecl
);
1798 /* Warn about conflicting visibility specifications. */
1799 if (DECL_VISIBILITY_SPECIFIED (olddecl
)
1800 && DECL_VISIBILITY_SPECIFIED (newdecl
)
1801 && DECL_VISIBILITY (newdecl
) != DECL_VISIBILITY (olddecl
))
1803 warning ("%J%qD: visibility attribute ignored because it",
1805 warning ("%Jconflicts with previous declaration here", olddecl
);
1807 /* Choose the declaration which specified visibility. */
1808 if (DECL_VISIBILITY_SPECIFIED (olddecl
))
1810 DECL_VISIBILITY (newdecl
) = DECL_VISIBILITY (olddecl
);
1811 DECL_VISIBILITY_SPECIFIED (newdecl
) = 1;
1814 /* The DECL_LANG_SPECIFIC information in OLDDECL will be replaced
1815 with that from NEWDECL below. */
1816 if (DECL_LANG_SPECIFIC (olddecl
))
1818 gcc_assert (DECL_LANG_SPECIFIC (olddecl
)
1819 != DECL_LANG_SPECIFIC (newdecl
));
1820 ggc_free (DECL_LANG_SPECIFIC (olddecl
));
1823 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1827 function_size
= sizeof (struct tree_decl
);
1829 memcpy ((char *) olddecl
+ sizeof (struct tree_common
),
1830 (char *) newdecl
+ sizeof (struct tree_common
),
1831 function_size
- sizeof (struct tree_common
));
1833 if (DECL_TEMPLATE_INSTANTIATION (newdecl
))
1834 /* If newdecl is a template instantiation, it is possible that
1835 the following sequence of events has occurred:
1837 o A friend function was declared in a class template. The
1838 class template was instantiated.
1840 o The instantiation of the friend declaration was
1841 recorded on the instantiation list, and is newdecl.
1843 o Later, however, instantiate_class_template called pushdecl
1844 on the newdecl to perform name injection. But, pushdecl in
1845 turn called duplicate_decls when it discovered that another
1846 declaration of a global function with the same name already
1849 o Here, in duplicate_decls, we decided to clobber newdecl.
1851 If we're going to do that, we'd better make sure that
1852 olddecl, and not newdecl, is on the list of
1853 instantiations so that if we try to do the instantiation
1854 again we won't get the clobbered declaration. */
1855 reregister_specialization (newdecl
,
1856 DECL_TI_TEMPLATE (newdecl
),
1861 memcpy ((char *) olddecl
+ sizeof (struct tree_common
),
1862 (char *) newdecl
+ sizeof (struct tree_common
),
1863 sizeof (struct tree_decl
) - sizeof (struct tree_common
)
1864 + TREE_CODE_LENGTH (TREE_CODE (newdecl
)) * sizeof (char *));
1867 DECL_UID (olddecl
) = olddecl_uid
;
1869 DECL_FRIEND_P (olddecl
) = 1;
1871 /* NEWDECL contains the merged attribute lists.
1872 Update OLDDECL to be the same. */
1873 DECL_ATTRIBUTES (olddecl
) = DECL_ATTRIBUTES (newdecl
);
1875 /* If OLDDECL had its DECL_RTL instantiated, re-invoke make_decl_rtl
1876 so that encode_section_info has a chance to look at the new decl
1877 flags and attributes. */
1878 if (DECL_RTL_SET_P (olddecl
)
1879 && (TREE_CODE (olddecl
) == FUNCTION_DECL
1880 || (TREE_CODE (olddecl
) == VAR_DECL
1881 && TREE_STATIC (olddecl
))))
1882 make_decl_rtl (olddecl
);
1884 /* The NEWDECL will no longer be needed. Because every out-of-class
1885 declaration of a member results in a call to duplicate_decls,
1886 freeing these nodes represents in a significant savings. */
1892 /* Return zero if the declaration NEWDECL is valid
1893 when the declaration OLDDECL (assumed to be for the same name)
1894 has already been seen.
1895 Otherwise return an error message format string with a %s
1896 where the identifier should go. */
1899 redeclaration_error_message (tree newdecl
, tree olddecl
)
1901 if (TREE_CODE (newdecl
) == TYPE_DECL
)
1903 /* Because C++ can put things into name space for free,
1904 constructs like "typedef struct foo { ... } foo"
1905 would look like an erroneous redeclaration. */
1906 if (same_type_p (TREE_TYPE (newdecl
), TREE_TYPE (olddecl
)))
1909 return "redefinition of %q#D";
1911 else if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1913 /* If this is a pure function, its olddecl will actually be
1914 the original initialization to `0' (which we force to call
1915 abort()). Don't complain about redefinition in this case. */
1916 if (DECL_LANG_SPECIFIC (olddecl
) && DECL_PURE_VIRTUAL_P (olddecl
)
1917 && DECL_INITIAL (olddecl
) == NULL_TREE
)
1920 /* If both functions come from different namespaces, this is not
1921 a redeclaration - this is a conflict with a used function. */
1922 if (DECL_NAMESPACE_SCOPE_P (olddecl
)
1923 && DECL_CONTEXT (olddecl
) != DECL_CONTEXT (newdecl
))
1924 return "%qD conflicts with used function";
1926 /* We'll complain about linkage mismatches in
1927 warn_extern_redeclared_static. */
1929 /* Defining the same name twice is no good. */
1930 if (DECL_INITIAL (olddecl
) != NULL_TREE
1931 && DECL_INITIAL (newdecl
) != NULL_TREE
)
1933 if (DECL_NAME (olddecl
) == NULL_TREE
)
1934 return "%q#D not declared in class";
1936 return "redefinition of %q#D";
1940 else if (TREE_CODE (newdecl
) == TEMPLATE_DECL
)
1944 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) == TYPE_DECL
)
1946 if (COMPLETE_TYPE_P (TREE_TYPE (newdecl
))
1947 && COMPLETE_TYPE_P (TREE_TYPE (olddecl
)))
1948 return "redefinition of %q#D";
1952 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) != FUNCTION_DECL
1953 || (DECL_TEMPLATE_RESULT (newdecl
)
1954 == DECL_TEMPLATE_RESULT (olddecl
)))
1957 nt
= DECL_TEMPLATE_RESULT (newdecl
);
1958 if (DECL_TEMPLATE_INFO (nt
))
1959 nt
= DECL_TEMPLATE_RESULT (template_for_substitution (nt
));
1960 ot
= DECL_TEMPLATE_RESULT (olddecl
);
1961 if (DECL_TEMPLATE_INFO (ot
))
1962 ot
= DECL_TEMPLATE_RESULT (template_for_substitution (ot
));
1963 if (DECL_INITIAL (nt
) && DECL_INITIAL (ot
))
1964 return "redefinition of %q#D";
1968 else if (toplevel_bindings_p () || DECL_NAMESPACE_SCOPE_P (newdecl
))
1970 /* Objects declared at top level: */
1971 /* If at least one is a reference, it's ok. */
1972 if (DECL_EXTERNAL (newdecl
) || DECL_EXTERNAL (olddecl
))
1974 /* Reject two definitions. */
1975 return "redefinition of %q#D";
1979 /* Objects declared with block scope: */
1980 /* Reject two definitions, and reject a definition
1981 together with an external reference. */
1982 if (!(DECL_EXTERNAL (newdecl
) && DECL_EXTERNAL (olddecl
)))
1983 return "redeclaration of %q#D";
1988 /* Create a new label, named ID. */
1991 make_label_decl (tree id
, int local_p
)
1995 decl
= build_decl (LABEL_DECL
, id
, void_type_node
);
1997 DECL_CONTEXT (decl
) = current_function_decl
;
1998 DECL_MODE (decl
) = VOIDmode
;
1999 C_DECLARED_LABEL_FLAG (decl
) = local_p
;
2001 /* Say where one reference is to the label, for the sake of the
2002 error if it is not defined. */
2003 DECL_SOURCE_LOCATION (decl
) = input_location
;
2005 /* Record the fact that this identifier is bound to this label. */
2006 SET_IDENTIFIER_LABEL_VALUE (id
, decl
);
2011 /* Record this label on the list of used labels so that we can check
2012 at the end of the function to see whether or not the label was
2013 actually defined, and so we can check when the label is defined whether
2014 this use is valid. */
2017 use_label (tree decl
)
2019 if (named_label_uses
== NULL
2020 || named_label_uses
->names_in_scope
!= current_binding_level
->names
2021 || named_label_uses
->label_decl
!= decl
)
2023 struct named_label_use_list
*new_ent
;
2024 new_ent
= GGC_NEW (struct named_label_use_list
);
2025 new_ent
->label_decl
= decl
;
2026 new_ent
->names_in_scope
= current_binding_level
->names
;
2027 new_ent
->binding_level
= current_binding_level
;
2028 new_ent
->o_goto_locus
= input_location
;
2029 new_ent
->next
= named_label_uses
;
2030 named_label_uses
= new_ent
;
2034 /* Look for a label named ID in the current function. If one cannot
2035 be found, create one. (We keep track of used, but undefined,
2036 labels, and complain about them at the end of a function.) */
2039 lookup_label (tree id
)
2042 struct named_label_list
*ent
;
2044 timevar_push (TV_NAME_LOOKUP
);
2045 /* You can't use labels at global scope. */
2046 if (current_function_decl
== NULL_TREE
)
2048 error ("label %qE referenced outside of any function", id
);
2049 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP
, NULL_TREE
);
2052 /* See if we've already got this label. */
2053 decl
= IDENTIFIER_LABEL_VALUE (id
);
2054 if (decl
!= NULL_TREE
&& DECL_CONTEXT (decl
) == current_function_decl
)
2055 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP
, decl
);
2057 /* Record this label on the list of labels used in this function.
2058 We do this before calling make_label_decl so that we get the
2059 IDENTIFIER_LABEL_VALUE before the new label is declared. */
2060 ent
= GGC_CNEW (struct named_label_list
);
2061 ent
->old_value
= IDENTIFIER_LABEL_VALUE (id
);
2062 ent
->next
= named_labels
;
2065 /* We need a new label. */
2066 decl
= make_label_decl (id
, /*local_p=*/0);
2068 /* Now fill in the information we didn't have before. */
2069 ent
->label_decl
= decl
;
2071 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP
, decl
);
2074 /* Declare a local label named ID. */
2077 declare_local_label (tree id
)
2081 /* Add a new entry to the SHADOWED_LABELS list so that when we leave
2082 this scope we can restore the old value of
2083 IDENTIFIER_TYPE_VALUE. */
2084 current_binding_level
->shadowed_labels
2085 = tree_cons (IDENTIFIER_LABEL_VALUE (id
), NULL_TREE
,
2086 current_binding_level
->shadowed_labels
);
2087 /* Look for the label. */
2088 decl
= make_label_decl (id
, /*local_p=*/1);
2089 /* Now fill in the information we didn't have before. */
2090 TREE_VALUE (current_binding_level
->shadowed_labels
) = decl
;
2095 /* Returns nonzero if it is ill-formed to jump past the declaration of
2096 DECL. Returns 2 if it's also a real problem. */
2099 decl_jump_unsafe (tree decl
)
2101 if (TREE_CODE (decl
) != VAR_DECL
|| TREE_STATIC (decl
))
2104 if (DECL_INITIAL (decl
) == NULL_TREE
2105 && pod_type_p (TREE_TYPE (decl
)))
2108 /* This is really only important if we're crossing an initialization.
2109 The POD stuff is just pedantry; why should it matter if the class
2110 contains a field of pointer to member type? */
2111 if (DECL_INITIAL (decl
)
2112 || (TYPE_NEEDS_CONSTRUCTING (TREE_TYPE (decl
))))
2117 /* Check that a single previously seen jump to a newly defined label
2118 is OK. DECL is the LABEL_DECL or 0; LEVEL is the binding_level for
2119 the jump context; NAMES are the names in scope in LEVEL at the jump
2120 context; FILE and LINE are the source position of the jump or 0. */
2123 check_previous_goto_1 (tree decl
,
2124 struct cp_binding_level
* level
,
2125 tree names
, const location_t
*locus
)
2129 struct cp_binding_level
*b
= current_binding_level
;
2130 for (; b
; b
= b
->level_chain
)
2132 tree new_decls
= b
->names
;
2133 tree old_decls
= (b
== level
? names
: NULL_TREE
);
2134 for (; new_decls
!= old_decls
;
2135 new_decls
= TREE_CHAIN (new_decls
))
2137 int problem
= decl_jump_unsafe (new_decls
);
2144 pedwarn ("jump to label %qD", decl
);
2146 pedwarn ("jump to case label");
2149 pedwarn ("%H from here", locus
);
2154 cp_error_at (" crosses initialization of %q#D",
2157 cp_pedwarn_at (" enters scope of non-POD %q#D",
2163 if ((b
->kind
== sk_try
|| b
->kind
== sk_catch
) && ! saw_eh
)
2168 pedwarn ("jump to label %qD", decl
);
2170 pedwarn ("jump to case label");
2173 pedwarn ("%H from here", locus
);
2176 if (b
->kind
== sk_try
)
2177 error (" enters try block");
2179 error (" enters catch block");
2186 check_previous_goto (struct named_label_use_list
* use
)
2188 check_previous_goto_1 (use
->label_decl
, use
->binding_level
,
2189 use
->names_in_scope
, &use
->o_goto_locus
);
2193 check_switch_goto (struct cp_binding_level
* level
)
2195 check_previous_goto_1 (NULL_TREE
, level
, level
->names
, NULL
);
2198 /* Check that any previously seen jumps to a newly defined label DECL
2199 are OK. Called by define_label. */
2202 check_previous_gotos (tree decl
)
2204 struct named_label_use_list
**usep
;
2206 if (! TREE_USED (decl
))
2209 for (usep
= &named_label_uses
; *usep
; )
2211 struct named_label_use_list
*use
= *usep
;
2212 if (use
->label_decl
== decl
)
2214 check_previous_goto (use
);
2218 usep
= &(use
->next
);
2222 /* Check that a new jump to a label DECL is OK. Called by
2223 finish_goto_stmt. */
2226 check_goto (tree decl
)
2230 struct named_label_list
*lab
;
2232 /* We can't know where a computed goto is jumping. So we assume
2234 if (! DECL_P (decl
))
2237 /* If the label hasn't been defined yet, defer checking. */
2238 if (! DECL_INITIAL (decl
))
2244 for (lab
= named_labels
; lab
; lab
= lab
->next
)
2245 if (decl
== lab
->label_decl
)
2248 /* If the label is not on named_labels it's a gcc local label, so
2249 it must be in an outer scope, so jumping to it is always OK. */
2253 if ((lab
->in_try_scope
|| lab
->in_catch_scope
|| lab
->bad_decls
)
2256 cp_pedwarn_at ("jump to label %qD", decl
);
2257 pedwarn (" from here");
2261 for (bad
= lab
->bad_decls
; bad
; bad
= TREE_CHAIN (bad
))
2263 tree b
= TREE_VALUE (bad
);
2264 int u
= decl_jump_unsafe (b
);
2266 if (u
> 1 && DECL_ARTIFICIAL (b
))
2267 /* Can't skip init of __exception_info. */
2268 error ("%J enters catch block", b
);
2270 cp_error_at (" skips initialization of %q#D", b
);
2272 cp_pedwarn_at (" enters scope of non-POD %q#D", b
);
2275 if (lab
->in_try_scope
)
2276 error (" enters try block");
2277 else if (lab
->in_catch_scope
)
2278 error (" enters catch block");
2281 /* Define a label, specifying the location in the source file.
2282 Return the LABEL_DECL node for the label. */
2285 define_label (location_t location
, tree name
)
2287 tree decl
= lookup_label (name
);
2288 struct named_label_list
*ent
;
2289 struct cp_binding_level
*p
;
2291 timevar_push (TV_NAME_LOOKUP
);
2292 for (ent
= named_labels
; ent
; ent
= ent
->next
)
2293 if (ent
->label_decl
== decl
)
2296 /* After labels, make any new cleanups in the function go into their
2297 own new (temporary) binding contour. */
2298 for (p
= current_binding_level
;
2299 p
->kind
!= sk_function_parms
;
2301 p
->more_cleanups_ok
= 0;
2303 if (name
== get_identifier ("wchar_t"))
2304 pedwarn ("label named wchar_t");
2306 if (DECL_INITIAL (decl
) != NULL_TREE
)
2307 error ("duplicate label %qD", decl
);
2310 /* Mark label as having been defined. */
2311 DECL_INITIAL (decl
) = error_mark_node
;
2312 /* Say where in the source. */
2313 DECL_SOURCE_LOCATION (decl
) = location
;
2316 ent
->names_in_scope
= current_binding_level
->names
;
2317 ent
->binding_level
= current_binding_level
;
2319 check_previous_gotos (decl
);
2322 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP
, decl
);
2327 struct cp_binding_level
*level
;
2328 struct cp_switch
*next
;
2329 /* The SWITCH_STMT being built. */
2331 /* A splay-tree mapping the low element of a case range to the high
2332 element, or NULL_TREE if there is no high element. Used to
2333 determine whether or not a new case label duplicates an old case
2334 label. We need a tree, rather than simply a hash table, because
2335 of the GNU case range extension. */
2339 /* A stack of the currently active switch statements. The innermost
2340 switch statement is on the top of the stack. There is no need to
2341 mark the stack for garbage collection because it is only active
2342 during the processing of the body of a function, and we never
2343 collect at that point. */
2345 static struct cp_switch
*switch_stack
;
2347 /* Called right after a switch-statement condition is parsed.
2348 SWITCH_STMT is the switch statement being parsed. */
2351 push_switch (tree switch_stmt
)
2353 struct cp_switch
*p
= xmalloc (sizeof (struct cp_switch
));
2354 p
->level
= current_binding_level
;
2355 p
->next
= switch_stack
;
2356 p
->switch_stmt
= switch_stmt
;
2357 p
->cases
= splay_tree_new (case_compare
, NULL
, NULL
);
2364 struct cp_switch
*cs
= switch_stack
;
2366 /* Emit warnings as needed. */
2367 c_do_switch_warnings (cs
->cases
, cs
->switch_stmt
);
2369 splay_tree_delete (cs
->cases
);
2370 switch_stack
= switch_stack
->next
;
2374 /* Note that we've seen a definition of a case label, and complain if this
2375 is a bad place for one. */
2378 finish_case_label (tree low_value
, tree high_value
)
2381 struct cp_binding_level
*p
;
2383 if (processing_template_decl
)
2387 /* For templates, just add the case label; we'll do semantic
2388 analysis at instantiation-time. */
2389 label
= build_decl (LABEL_DECL
, NULL_TREE
, NULL_TREE
);
2390 return add_stmt (build_case_label (low_value
, high_value
, label
));
2393 /* Find the condition on which this switch statement depends. */
2394 cond
= SWITCH_STMT_COND (switch_stack
->switch_stmt
);
2395 if (cond
&& TREE_CODE (cond
) == TREE_LIST
)
2396 cond
= TREE_VALUE (cond
);
2398 r
= c_add_case_label (switch_stack
->cases
, cond
, TREE_TYPE (cond
),
2399 low_value
, high_value
);
2401 check_switch_goto (switch_stack
->level
);
2403 /* After labels, make any new cleanups in the function go into their
2404 own new (temporary) binding contour. */
2405 for (p
= current_binding_level
;
2406 p
->kind
!= sk_function_parms
;
2408 p
->more_cleanups_ok
= 0;
2413 /* Hash a TYPENAME_TYPE. K is really of type `tree'. */
2416 typename_hash (const void* k
)
2421 hash
= (htab_hash_pointer (TYPE_CONTEXT (t
))
2422 ^ htab_hash_pointer (DECL_NAME (TYPE_NAME (t
))));
2427 typedef struct typename_info
{
2435 /* Compare two TYPENAME_TYPEs. K1 and K2 are really of type `tree'. */
2438 typename_compare (const void * k1
, const void * k2
)
2441 const typename_info
*t2
;
2444 t2
= (const typename_info
*) k2
;
2446 return (DECL_NAME (TYPE_NAME (t1
)) == t2
->name
2447 && TYPE_CONTEXT (t1
) == t2
->scope
2448 && TYPENAME_TYPE_FULLNAME (t1
) == t2
->template_id
2449 && TYPENAME_IS_ENUM_P (t1
) == t2
->enum_p
2450 && TYPENAME_IS_CLASS_P (t1
) == t2
->class_p
);
2453 /* Build a TYPENAME_TYPE. If the type is `typename T::t', CONTEXT is
2454 the type of `T', NAME is the IDENTIFIER_NODE for `t'.
2456 Returns the new TYPENAME_TYPE. */
2458 static GTY ((param_is (union tree_node
))) htab_t typename_htab
;
2461 build_typename_type (tree context
, tree name
, tree fullname
,
2462 enum tag_types tag_type
)
2470 if (typename_htab
== NULL
)
2471 typename_htab
= htab_create_ggc (61, &typename_hash
,
2472 &typename_compare
, NULL
);
2474 ti
.scope
= FROB_CONTEXT (context
);
2476 ti
.template_id
= fullname
;
2477 ti
.enum_p
= tag_type
== enum_type
;
2478 ti
.class_p
= (tag_type
== class_type
2479 || tag_type
== record_type
2480 || tag_type
== union_type
);
2481 hash
= (htab_hash_pointer (ti
.scope
)
2482 ^ htab_hash_pointer (ti
.name
));
2484 /* See if we already have this type. */
2485 e
= htab_find_slot_with_hash (typename_htab
, &ti
, hash
, INSERT
);
2490 /* Build the TYPENAME_TYPE. */
2491 t
= make_aggr_type (TYPENAME_TYPE
);
2492 TYPE_CONTEXT (t
) = ti
.scope
;
2493 TYPENAME_TYPE_FULLNAME (t
) = ti
.template_id
;
2494 TYPENAME_IS_ENUM_P (t
) = ti
.enum_p
;
2495 TYPENAME_IS_CLASS_P (t
) = ti
.class_p
;
2497 /* Build the corresponding TYPE_DECL. */
2498 d
= build_decl (TYPE_DECL
, name
, t
);
2499 TYPE_NAME (TREE_TYPE (d
)) = d
;
2500 TYPE_STUB_DECL (TREE_TYPE (d
)) = d
;
2501 DECL_CONTEXT (d
) = FROB_CONTEXT (context
);
2502 DECL_ARTIFICIAL (d
) = 1;
2504 /* Store it in the hash table. */
2511 /* Resolve `typename CONTEXT::NAME'. TAG_TYPE indicates the tag
2512 provided to name the type. Returns an appropriate type, unless an
2513 error occurs, in which case error_mark_node is returned. If we
2514 locate a non-artificial TYPE_DECL and TF_KEEP_TYPE_DECL is set, we
2515 return that, rather than the _TYPE it corresponds to, in other
2516 cases we look through the type decl. If TF_ERROR is set, complain
2517 about errors, otherwise be quiet. */
2520 make_typename_type (tree context
, tree name
, enum tag_types tag_type
,
2521 tsubst_flags_t complain
)
2525 if (name
== error_mark_node
2526 || context
== NULL_TREE
2527 || context
== error_mark_node
)
2528 return error_mark_node
;
2532 if (!(TYPE_LANG_SPECIFIC (name
)
2533 && (CLASSTYPE_IS_TEMPLATE (name
)
2534 || CLASSTYPE_USE_TEMPLATE (name
))))
2535 name
= TYPE_IDENTIFIER (name
);
2537 /* Create a TEMPLATE_ID_EXPR for the type. */
2538 name
= build_nt (TEMPLATE_ID_EXPR
,
2539 CLASSTYPE_TI_TEMPLATE (name
),
2540 CLASSTYPE_TI_ARGS (name
));
2542 else if (TREE_CODE (name
) == TYPE_DECL
)
2543 name
= DECL_NAME (name
);
2547 if (TREE_CODE (name
) == TEMPLATE_ID_EXPR
)
2549 name
= TREE_OPERAND (name
, 0);
2550 if (TREE_CODE (name
) == TEMPLATE_DECL
)
2551 name
= TREE_OPERAND (fullname
, 0) = DECL_NAME (name
);
2553 if (TREE_CODE (name
) == TEMPLATE_DECL
)
2555 error ("%qD used without template parameters", name
);
2556 return error_mark_node
;
2558 gcc_assert (TREE_CODE (name
) == IDENTIFIER_NODE
);
2559 gcc_assert (TYPE_P (context
));
2561 if (!dependent_type_p (context
)
2562 || currently_open_class (context
))
2564 if (TREE_CODE (fullname
) == TEMPLATE_ID_EXPR
)
2566 tree tmpl
= NULL_TREE
;
2567 if (IS_AGGR_TYPE (context
))
2568 tmpl
= lookup_field (context
, name
, 0, false);
2569 if (!tmpl
|| !DECL_CLASS_TEMPLATE_P (tmpl
))
2571 if (complain
& tf_error
)
2572 error ("no class template named %q#T in %q#T",
2574 return error_mark_node
;
2577 if (complain
& tf_error
)
2578 perform_or_defer_access_check (TYPE_BINFO (context
), tmpl
);
2580 return lookup_template_class (tmpl
,
2581 TREE_OPERAND (fullname
, 1),
2583 /*entering_scope=*/0,
2584 tf_error
| tf_warning
| tf_user
);
2590 if (!IS_AGGR_TYPE (context
))
2592 if (complain
& tf_error
)
2593 error ("no type named %q#T in %q#T", name
, context
);
2594 return error_mark_node
;
2597 t
= lookup_field (context
, name
, 0, true);
2600 if (TREE_CODE (t
) != TYPE_DECL
)
2602 if (complain
& tf_error
)
2603 error ("no type named %q#T in %q#T", name
, context
);
2604 return error_mark_node
;
2607 if (complain
& tf_error
)
2608 perform_or_defer_access_check (TYPE_BINFO (context
), t
);
2610 if (DECL_ARTIFICIAL (t
) || !(complain
& tf_keep_type_decl
))
2618 /* If the CONTEXT is not a template type, then either the field is
2619 there now or its never going to be. */
2620 if (!dependent_type_p (context
))
2622 if (complain
& tf_error
)
2623 error ("no type named %q#T in %q#T", name
, context
);
2624 return error_mark_node
;
2627 return build_typename_type (context
, name
, fullname
, tag_type
);
2630 /* Resolve `CONTEXT::template NAME'. Returns a TEMPLATE_DECL if the name
2631 can be resolved or an UNBOUND_CLASS_TEMPLATE, unless an error occurs,
2632 in which case error_mark_node is returned.
2634 If PARM_LIST is non-NULL, also make sure that the template parameter
2635 list of TEMPLATE_DECL matches.
2637 If COMPLAIN zero, don't complain about any errors that occur. */
2640 make_unbound_class_template (tree context
, tree name
, tree parm_list
,
2641 tsubst_flags_t complain
)
2647 name
= TYPE_IDENTIFIER (name
);
2648 else if (DECL_P (name
))
2649 name
= DECL_NAME (name
);
2650 gcc_assert (TREE_CODE (name
) == IDENTIFIER_NODE
);
2652 if (!dependent_type_p (context
)
2653 || currently_open_class (context
))
2655 tree tmpl
= NULL_TREE
;
2657 if (IS_AGGR_TYPE (context
))
2658 tmpl
= lookup_field (context
, name
, 0, false);
2660 if (!tmpl
|| !DECL_CLASS_TEMPLATE_P (tmpl
))
2662 if (complain
& tf_error
)
2663 error ("no class template named %q#T in %q#T", name
, context
);
2664 return error_mark_node
;
2668 && !comp_template_parms (DECL_TEMPLATE_PARMS (tmpl
), parm_list
))
2670 if (complain
& tf_error
)
2672 error ("template parameters do not match template");
2673 cp_error_at ("%qD declared here", tmpl
);
2675 return error_mark_node
;
2678 if (complain
& tf_error
)
2679 perform_or_defer_access_check (TYPE_BINFO (context
), tmpl
);
2684 /* Build the UNBOUND_CLASS_TEMPLATE. */
2685 t
= make_aggr_type (UNBOUND_CLASS_TEMPLATE
);
2686 TYPE_CONTEXT (t
) = FROB_CONTEXT (context
);
2687 TREE_TYPE (t
) = NULL_TREE
;
2689 /* Build the corresponding TEMPLATE_DECL. */
2690 d
= build_decl (TEMPLATE_DECL
, name
, t
);
2691 TYPE_NAME (TREE_TYPE (d
)) = d
;
2692 TYPE_STUB_DECL (TREE_TYPE (d
)) = d
;
2693 DECL_CONTEXT (d
) = FROB_CONTEXT (context
);
2694 DECL_ARTIFICIAL (d
) = 1;
2695 DECL_TEMPLATE_PARMS (d
) = parm_list
;
2702 /* Push the declarations of builtin types into the namespace.
2703 RID_INDEX is the index of the builtin type in the array
2704 RID_POINTERS. NAME is the name used when looking up the builtin
2705 type. TYPE is the _TYPE node for the builtin type. */
2708 record_builtin_type (enum rid rid_index
,
2712 tree rname
= NULL_TREE
, tname
= NULL_TREE
;
2713 tree tdecl
= NULL_TREE
;
2715 if ((int) rid_index
< (int) RID_MAX
)
2716 rname
= ridpointers
[(int) rid_index
];
2718 tname
= get_identifier (name
);
2720 /* The calls to SET_IDENTIFIER_GLOBAL_VALUE below should be
2721 eliminated. Built-in types should not be looked up name; their
2722 names are keywords that the parser can recognize. However, there
2723 is code in c-common.c that uses identifier_global_value to look
2724 up built-in types by name. */
2727 tdecl
= build_decl (TYPE_DECL
, tname
, type
);
2728 DECL_ARTIFICIAL (tdecl
) = 1;
2729 SET_IDENTIFIER_GLOBAL_VALUE (tname
, tdecl
);
2735 tdecl
= build_decl (TYPE_DECL
, rname
, type
);
2736 DECL_ARTIFICIAL (tdecl
) = 1;
2738 SET_IDENTIFIER_GLOBAL_VALUE (rname
, tdecl
);
2741 if (!TYPE_NAME (type
))
2742 TYPE_NAME (type
) = tdecl
;
2745 debug_hooks
->type_decl (tdecl
, 0);
2748 /* Record one of the standard Java types.
2749 * Declare it as having the given NAME.
2750 * If SIZE > 0, it is the size of one of the integral types;
2751 * otherwise it is the negative of the size of one of the other types. */
2754 record_builtin_java_type (const char* name
, int size
)
2758 type
= make_signed_type (size
);
2759 else if (size
> -32)
2760 { /* "__java_char" or ""__java_boolean". */
2761 type
= make_unsigned_type (-size
);
2762 /*if (size == -1) TREE_SET_CODE (type, BOOLEAN_TYPE);*/
2765 { /* "__java_float" or ""__java_double". */
2766 type
= make_node (REAL_TYPE
);
2767 TYPE_PRECISION (type
) = - size
;
2770 record_builtin_type (RID_MAX
, name
, type
);
2771 decl
= TYPE_NAME (type
);
2773 /* Suppress generate debug symbol entries for these types,
2774 since for normal C++ they are just clutter.
2775 However, push_lang_context undoes this if extern "Java" is seen. */
2776 DECL_IGNORED_P (decl
) = 1;
2778 TYPE_FOR_JAVA (type
) = 1;
2782 /* Push a type into the namespace so that the back-ends ignore it. */
2785 record_unknown_type (tree type
, const char* name
)
2787 tree decl
= pushdecl (build_decl (TYPE_DECL
, get_identifier (name
), type
));
2788 /* Make sure the "unknown type" typedecl gets ignored for debug info. */
2789 DECL_IGNORED_P (decl
) = 1;
2790 TYPE_DECL_SUPPRESS_DEBUG (decl
) = 1;
2791 TYPE_SIZE (type
) = TYPE_SIZE (void_type_node
);
2792 TYPE_ALIGN (type
) = 1;
2793 TYPE_USER_ALIGN (type
) = 0;
2794 TYPE_MODE (type
) = TYPE_MODE (void_type_node
);
2797 /* An string for which we should create an IDENTIFIER_NODE at
2800 typedef struct predefined_identifier
2802 /* The name of the identifier. */
2803 const char *const name
;
2804 /* The place where the IDENTIFIER_NODE should be stored. */
2806 /* Nonzero if this is the name of a constructor or destructor. */
2807 const int ctor_or_dtor_p
;
2808 } predefined_identifier
;
2810 /* Create all the predefined identifiers. */
2813 initialize_predefined_identifiers (void)
2815 const predefined_identifier
*pid
;
2817 /* A table of identifiers to create at startup. */
2818 static const predefined_identifier predefined_identifiers
[] = {
2819 { "C++", &lang_name_cplusplus
, 0 },
2820 { "C", &lang_name_c
, 0 },
2821 { "Java", &lang_name_java
, 0 },
2822 /* Some of these names have a trailing space so that it is
2823 impossible for them to conflict with names written by users. */
2824 { "__ct ", &ctor_identifier
, 1 },
2825 { "__base_ctor ", &base_ctor_identifier
, 1 },
2826 { "__comp_ctor ", &complete_ctor_identifier
, 1 },
2827 { "__dt ", &dtor_identifier
, 1 },
2828 { "__comp_dtor ", &complete_dtor_identifier
, 1 },
2829 { "__base_dtor ", &base_dtor_identifier
, 1 },
2830 { "__deleting_dtor ", &deleting_dtor_identifier
, 1 },
2831 { IN_CHARGE_NAME
, &in_charge_identifier
, 0 },
2832 { "nelts", &nelts_identifier
, 0 },
2833 { THIS_NAME
, &this_identifier
, 0 },
2834 { VTABLE_DELTA_NAME
, &delta_identifier
, 0 },
2835 { VTABLE_PFN_NAME
, &pfn_identifier
, 0 },
2836 { "_vptr", &vptr_identifier
, 0 },
2837 { "__vtt_parm", &vtt_parm_identifier
, 0 },
2838 { "::", &global_scope_name
, 0 },
2839 { "std", &std_identifier
, 0 },
2843 for (pid
= predefined_identifiers
; pid
->name
; ++pid
)
2845 *pid
->node
= get_identifier (pid
->name
);
2846 if (pid
->ctor_or_dtor_p
)
2847 IDENTIFIER_CTOR_OR_DTOR_P (*pid
->node
) = 1;
2851 /* Create the predefined scalar types of C,
2852 and some nodes representing standard constants (0, 1, (void *)0).
2853 Initialize the global binding level.
2854 Make definitions for built-in primitive functions. */
2857 cxx_init_decl_processing (void)
2860 tree void_ftype_ptr
;
2862 build_common_tree_nodes (flag_signed_char
, false);
2864 /* Create all the identifiers we need. */
2865 initialize_predefined_identifiers ();
2867 /* Create the global variables. */
2868 push_to_top_level ();
2870 current_function_decl
= NULL_TREE
;
2871 current_binding_level
= NULL
;
2872 /* Enter the global namespace. */
2873 gcc_assert (global_namespace
== NULL_TREE
);
2874 global_namespace
= build_lang_decl (NAMESPACE_DECL
, global_scope_name
,
2876 begin_scope (sk_namespace
, global_namespace
);
2878 current_lang_name
= NULL_TREE
;
2880 /* Adjust various flags based on command-line settings. */
2881 if (!flag_permissive
)
2882 flag_pedantic_errors
= 1;
2883 if (!flag_no_inline
)
2885 flag_inline_trees
= 1;
2888 if (flag_inline_functions
)
2889 flag_inline_trees
= 2;
2891 /* Force minimum function alignment if using the least significant
2892 bit of function pointers to store the virtual bit. */
2893 if (TARGET_PTRMEMFUNC_VBIT_LOCATION
== ptrmemfunc_vbit_in_pfn
2894 && force_align_functions_log
< 1)
2895 force_align_functions_log
= 1;
2898 current_lang_name
= lang_name_c
;
2900 error_mark_list
= build_tree_list (error_mark_node
, error_mark_node
);
2901 TREE_TYPE (error_mark_list
) = error_mark_node
;
2903 /* Create the `std' namespace. */
2904 push_namespace (std_identifier
);
2905 std_node
= current_namespace
;
2908 c_common_nodes_and_builtins ();
2910 java_byte_type_node
= record_builtin_java_type ("__java_byte", 8);
2911 java_short_type_node
= record_builtin_java_type ("__java_short", 16);
2912 java_int_type_node
= record_builtin_java_type ("__java_int", 32);
2913 java_long_type_node
= record_builtin_java_type ("__java_long", 64);
2914 java_float_type_node
= record_builtin_java_type ("__java_float", -32);
2915 java_double_type_node
= record_builtin_java_type ("__java_double", -64);
2916 java_char_type_node
= record_builtin_java_type ("__java_char", -16);
2917 java_boolean_type_node
= record_builtin_java_type ("__java_boolean", -1);
2919 integer_two_node
= build_int_cst (NULL_TREE
, 2);
2920 integer_three_node
= build_int_cst (NULL_TREE
, 3);
2922 record_builtin_type (RID_BOOL
, "bool", boolean_type_node
);
2923 truthvalue_type_node
= boolean_type_node
;
2924 truthvalue_false_node
= boolean_false_node
;
2925 truthvalue_true_node
= boolean_true_node
;
2927 empty_except_spec
= build_tree_list (NULL_TREE
, NULL_TREE
);
2930 record_builtin_type (RID_MAX
, NULL
, string_type_node
);
2933 delta_type_node
= ptrdiff_type_node
;
2934 vtable_index_type
= ptrdiff_type_node
;
2936 vtt_parm_type
= build_pointer_type (const_ptr_type_node
);
2937 void_ftype
= build_function_type (void_type_node
, void_list_node
);
2938 void_ftype_ptr
= build_function_type (void_type_node
,
2939 tree_cons (NULL_TREE
,
2943 = build_exception_variant (void_ftype_ptr
, empty_except_spec
);
2945 /* C++ extensions */
2947 unknown_type_node
= make_node (UNKNOWN_TYPE
);
2948 record_unknown_type (unknown_type_node
, "unknown type");
2950 /* Indirecting an UNKNOWN_TYPE node yields an UNKNOWN_TYPE node. */
2951 TREE_TYPE (unknown_type_node
) = unknown_type_node
;
2953 /* Looking up TYPE_POINTER_TO and TYPE_REFERENCE_TO yield the same
2955 TYPE_POINTER_TO (unknown_type_node
) = unknown_type_node
;
2956 TYPE_REFERENCE_TO (unknown_type_node
) = unknown_type_node
;
2959 /* Make sure we get a unique function type, so we can give
2960 its pointer type a name. (This wins for gdb.) */
2961 tree vfunc_type
= make_node (FUNCTION_TYPE
);
2962 TREE_TYPE (vfunc_type
) = integer_type_node
;
2963 TYPE_ARG_TYPES (vfunc_type
) = NULL_TREE
;
2964 layout_type (vfunc_type
);
2966 vtable_entry_type
= build_pointer_type (vfunc_type
);
2968 record_builtin_type (RID_MAX
, VTBL_PTR_TYPE
, vtable_entry_type
);
2971 = build_cplus_array_type (vtable_entry_type
, NULL_TREE
);
2972 layout_type (vtbl_type_node
);
2973 vtbl_type_node
= build_qualified_type (vtbl_type_node
, TYPE_QUAL_CONST
);
2974 record_builtin_type (RID_MAX
, NULL
, vtbl_type_node
);
2975 vtbl_ptr_type_node
= build_pointer_type (vtable_entry_type
);
2976 layout_type (vtbl_ptr_type_node
);
2977 record_builtin_type (RID_MAX
, NULL
, vtbl_ptr_type_node
);
2979 push_namespace (get_identifier ("__cxxabiv1"));
2980 abi_node
= current_namespace
;
2983 global_type_node
= make_node (LANG_TYPE
);
2984 record_unknown_type (global_type_node
, "global type");
2987 current_lang_name
= lang_name_cplusplus
;
2991 tree bad_alloc_type_node
;
2992 tree bad_alloc_decl
;
2993 tree newtype
, deltype
;
2994 tree ptr_ftype_sizetype
;
2996 push_namespace (std_identifier
);
2997 bad_alloc_id
= get_identifier ("bad_alloc");
2998 bad_alloc_type_node
= make_aggr_type (RECORD_TYPE
);
2999 TYPE_CONTEXT (bad_alloc_type_node
) = current_namespace
;
3001 = create_implicit_typedef (bad_alloc_id
, bad_alloc_type_node
);
3002 DECL_CONTEXT (bad_alloc_decl
) = current_namespace
;
3003 TYPE_STUB_DECL (bad_alloc_type_node
) = bad_alloc_decl
;
3007 = build_function_type (ptr_type_node
,
3008 tree_cons (NULL_TREE
,
3011 newtype
= build_exception_variant
3012 (ptr_ftype_sizetype
, add_exception_specifier
3013 (NULL_TREE
, bad_alloc_type_node
, -1));
3014 deltype
= build_exception_variant (void_ftype_ptr
, empty_except_spec
);
3015 push_cp_library_fn (NEW_EXPR
, newtype
);
3016 push_cp_library_fn (VEC_NEW_EXPR
, newtype
);
3017 global_delete_fndecl
= push_cp_library_fn (DELETE_EXPR
, deltype
);
3018 push_cp_library_fn (VEC_DELETE_EXPR
, deltype
);
3022 = build_library_fn_ptr ("__cxa_pure_virtual", void_ftype
);
3024 /* Perform other language dependent initializations. */
3025 init_class_processing ();
3026 init_rtti_processing ();
3028 if (flag_exceptions
)
3029 init_exception_processing ();
3031 if (! supports_one_only ())
3034 make_fname_decl
= cp_make_fname_decl
;
3035 start_fname_decls ();
3037 /* Show we use EH for cleanups. */
3038 if (flag_exceptions
)
3039 using_eh_for_cleanups ();
3042 /* Generate an initializer for a function naming variable from
3043 NAME. NAME may be NULL, to indicate a dependent name. TYPE_P is
3044 filled in with the type of the init. */
3047 cp_fname_init (const char* name
, tree
*type_p
)
3049 tree domain
= NULL_TREE
;
3051 tree init
= NULL_TREE
;
3056 length
= strlen (name
);
3057 domain
= build_index_type (size_int (length
));
3058 init
= build_string (length
+ 1, name
);
3061 type
= build_qualified_type (char_type_node
, TYPE_QUAL_CONST
);
3062 type
= build_cplus_array_type (type
, domain
);
3067 TREE_TYPE (init
) = type
;
3069 init
= error_mark_node
;
3074 /* Create the VAR_DECL for __FUNCTION__ etc. ID is the name to give the
3075 decl, NAME is the initialization string and TYPE_DEP indicates whether
3076 NAME depended on the type of the function. We make use of that to detect
3077 __PRETTY_FUNCTION__ inside a template fn. This is being done
3078 lazily at the point of first use, so we mustn't push the decl now. */
3081 cp_make_fname_decl (tree id
, int type_dep
)
3083 const char *const name
= (type_dep
&& processing_template_decl
3084 ? NULL
: fname_as_string (type_dep
));
3086 tree init
= cp_fname_init (name
, &type
);
3087 tree decl
= build_decl (VAR_DECL
, id
, type
);
3090 free ((char *) name
);
3092 /* As we're using pushdecl_with_scope, we must set the context. */
3093 DECL_CONTEXT (decl
) = current_function_decl
;
3094 DECL_PRETTY_FUNCTION_P (decl
) = type_dep
;
3096 TREE_STATIC (decl
) = 1;
3097 TREE_READONLY (decl
) = 1;
3098 DECL_ARTIFICIAL (decl
) = 1;
3099 DECL_INITIAL (decl
) = init
;
3101 TREE_USED (decl
) = 1;
3103 if (current_function_decl
)
3105 struct cp_binding_level
*b
= current_binding_level
;
3106 while (b
->level_chain
->kind
!= sk_function_parms
)
3108 pushdecl_with_scope (decl
, b
);
3109 cp_finish_decl (decl
, init
, NULL_TREE
, LOOKUP_ONLYCONVERTING
);
3112 pushdecl_top_level_and_finish (decl
, init
);
3117 /* Make a definition for a builtin function named NAME in the current
3118 namespace, whose data type is TYPE and whose context is CONTEXT.
3119 TYPE should be a function type with argument types.
3121 CLASS and CODE tell later passes how to compile calls to this function.
3122 See tree.h for possible values.
3124 If LIBNAME is nonzero, use that for DECL_ASSEMBLER_NAME,
3125 the name to be called if we can't opencode the function.
3126 If ATTRS is nonzero, use that for the function's attribute
3130 builtin_function_1 (const char* name
,
3133 enum built_in_function code
,
3134 enum built_in_class
class,
3135 const char* libname
,
3138 tree decl
= build_library_fn_1 (get_identifier (name
), ERROR_MARK
, type
);
3139 DECL_BUILT_IN_CLASS (decl
) = class;
3140 DECL_FUNCTION_CODE (decl
) = code
;
3141 DECL_CONTEXT (decl
) = context
;
3145 /* Since `pushdecl' relies on DECL_ASSEMBLER_NAME instead of DECL_NAME,
3146 we cannot change DECL_ASSEMBLER_NAME until we have installed this
3147 function in the namespace. */
3149 SET_DECL_ASSEMBLER_NAME (decl
, get_identifier (libname
));
3151 /* Warn if a function in the namespace for users
3152 is used without an occasion to consider it declared. */
3153 if (name
[0] != '_' || name
[1] != '_')
3154 DECL_ANTICIPATED (decl
) = 1;
3156 /* Possibly apply some default attributes to this built-in function. */
3158 decl_attributes (&decl
, attrs
, ATTR_FLAG_BUILT_IN
);
3160 decl_attributes (&decl
, NULL_TREE
, 0);
3165 /* Entry point for the benefit of c_common_nodes_and_builtins.
3167 Make a definition for a builtin function named NAME and whose data type
3168 is TYPE. TYPE should be a function type with argument types. This
3169 function places the anticipated declaration in the global namespace
3170 and additionally in the std namespace if appropriate.
3172 CLASS and CODE tell later passes how to compile calls to this function.
3173 See tree.h for possible values.
3175 If LIBNAME is nonzero, use that for DECL_ASSEMBLER_NAME,
3176 the name to be called if we can't opencode the function.
3178 If ATTRS is nonzero, use that for the function's attribute
3182 builtin_function (const char* name
,
3185 enum built_in_class cl
,
3186 const char* libname
,
3189 /* All builtins that don't begin with an '_' should additionally
3190 go in the 'std' namespace. */
3193 push_namespace (std_identifier
);
3194 builtin_function_1 (name
, type
, std_node
, code
, cl
, libname
, attrs
);
3198 return builtin_function_1 (name
, type
, NULL_TREE
, code
,
3199 cl
, libname
, attrs
);
3202 /* Generate a FUNCTION_DECL with the typical flags for a runtime library
3203 function. Not called directly. */
3206 build_library_fn_1 (tree name
, enum tree_code operator_code
, tree type
)
3208 tree fn
= build_lang_decl (FUNCTION_DECL
, name
, type
);
3209 DECL_EXTERNAL (fn
) = 1;
3210 TREE_PUBLIC (fn
) = 1;
3211 DECL_ARTIFICIAL (fn
) = 1;
3212 TREE_NOTHROW (fn
) = 1;
3213 SET_OVERLOADED_OPERATOR_CODE (fn
, operator_code
);
3214 SET_DECL_LANGUAGE (fn
, lang_c
);
3215 /* Runtime library routines are, by definition, available in an
3216 external shared object. */
3217 DECL_VISIBILITY (fn
) = VISIBILITY_DEFAULT
;
3218 DECL_VISIBILITY_SPECIFIED (fn
) = 1;
3222 /* Returns the _DECL for a library function with C linkage.
3223 We assume that such functions never throw; if this is incorrect,
3224 callers should unset TREE_NOTHROW. */
3227 build_library_fn (tree name
, tree type
)
3229 return build_library_fn_1 (name
, ERROR_MARK
, type
);
3232 /* Returns the _DECL for a library function with C++ linkage. */
3235 build_cp_library_fn (tree name
, enum tree_code operator_code
, tree type
)
3237 tree fn
= build_library_fn_1 (name
, operator_code
, type
);
3238 TREE_NOTHROW (fn
) = TYPE_NOTHROW_P (type
);
3239 DECL_CONTEXT (fn
) = FROB_CONTEXT (current_namespace
);
3240 SET_DECL_LANGUAGE (fn
, lang_cplusplus
);
3244 /* Like build_library_fn, but takes a C string instead of an
3248 build_library_fn_ptr (const char* name
, tree type
)
3250 return build_library_fn (get_identifier (name
), type
);
3253 /* Like build_cp_library_fn, but takes a C string instead of an
3257 build_cp_library_fn_ptr (const char* name
, tree type
)
3259 return build_cp_library_fn (get_identifier (name
), ERROR_MARK
, type
);
3262 /* Like build_library_fn, but also pushes the function so that we will
3263 be able to find it via IDENTIFIER_GLOBAL_VALUE. */
3266 push_library_fn (tree name
, tree type
)
3268 tree fn
= build_library_fn (name
, type
);
3269 pushdecl_top_level (fn
);
3273 /* Like build_cp_library_fn, but also pushes the function so that it
3274 will be found by normal lookup. */
3277 push_cp_library_fn (enum tree_code operator_code
, tree type
)
3279 tree fn
= build_cp_library_fn (ansi_opname (operator_code
),
3286 /* Like push_library_fn, but takes a TREE_LIST of parm types rather than
3290 push_void_library_fn (tree name
, tree parmtypes
)
3292 tree type
= build_function_type (void_type_node
, parmtypes
);
3293 return push_library_fn (name
, type
);
3296 /* Like push_library_fn, but also note that this function throws
3297 and does not return. Used for __throw_foo and the like. */
3300 push_throw_library_fn (tree name
, tree type
)
3302 tree fn
= push_library_fn (name
, type
);
3303 TREE_THIS_VOLATILE (fn
) = 1;
3304 TREE_NOTHROW (fn
) = 0;
3308 /* When we call finish_struct for an anonymous union, we create
3309 default copy constructors and such. But, an anonymous union
3310 shouldn't have such things; this function undoes the damage to the
3311 anonymous union type T.
3313 (The reason that we create the synthesized methods is that we don't
3314 distinguish `union { int i; }' from `typedef union { int i; } U'.
3315 The first is an anonymous union; the second is just an ordinary
3319 fixup_anonymous_aggr (tree t
)
3323 /* Wipe out memory of synthesized methods. */
3324 TYPE_HAS_CONSTRUCTOR (t
) = 0;
3325 TYPE_HAS_DEFAULT_CONSTRUCTOR (t
) = 0;
3326 TYPE_HAS_INIT_REF (t
) = 0;
3327 TYPE_HAS_CONST_INIT_REF (t
) = 0;
3328 TYPE_HAS_ASSIGN_REF (t
) = 0;
3329 TYPE_HAS_CONST_ASSIGN_REF (t
) = 0;
3331 /* Splice the implicitly generated functions out of the TYPE_METHODS
3333 q
= &TYPE_METHODS (t
);
3336 if (DECL_ARTIFICIAL (*q
))
3337 *q
= TREE_CHAIN (*q
);
3339 q
= &TREE_CHAIN (*q
);
3342 /* ISO C++ 9.5.3. Anonymous unions may not have function members. */
3343 if (TYPE_METHODS (t
))
3344 error ("%Jan anonymous union cannot have function members",
3345 TYPE_MAIN_DECL (t
));
3347 /* Anonymous aggregates cannot have fields with ctors, dtors or complex
3348 assignment operators (because they cannot have these methods themselves).
3349 For anonymous unions this is already checked because they are not allowed
3350 in any union, otherwise we have to check it. */
3351 if (TREE_CODE (t
) != UNION_TYPE
)
3355 for (field
= TYPE_FIELDS (t
); field
; field
= TREE_CHAIN (field
))
3356 if (TREE_CODE (field
) == FIELD_DECL
)
3358 type
= TREE_TYPE (field
);
3359 if (CLASS_TYPE_P (type
))
3361 if (TYPE_NEEDS_CONSTRUCTING (type
))
3362 cp_error_at ("member %q#D with constructor not allowed "
3363 "in anonymous aggregate",
3365 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type
))
3366 cp_error_at ("member %q#D with destructor not allowed "
3367 "in anonymous aggregate",
3369 if (TYPE_HAS_COMPLEX_ASSIGN_REF (type
))
3370 cp_error_at ("member %q#D with copy assignment operator "
3371 "not allowed in anonymous aggregate",
3378 /* Make sure that a declaration with no declarator is well-formed, i.e.
3379 just declares a tagged type or anonymous union.
3381 Returns the type declared; or NULL_TREE if none. */
3384 check_tag_decl (cp_decl_specifier_seq
*declspecs
)
3386 int saw_friend
= declspecs
->specs
[(int)ds_friend
] != 0;
3387 int saw_typedef
= declspecs
->specs
[(int)ds_typedef
] != 0;
3388 /* If a class, struct, or enum type is declared by the DECLSPECS
3389 (i.e, if a class-specifier, enum-specifier, or non-typename
3390 elaborated-type-specifier appears in the DECLSPECS),
3391 DECLARED_TYPE is set to the corresponding type. */
3392 tree declared_type
= NULL_TREE
;
3393 bool error_p
= false;
3395 if (declspecs
->multiple_types_p
)
3396 error ("multiple types in one declaration");
3397 else if (declspecs
->redefined_builtin_type
)
3399 if (!in_system_header
)
3400 pedwarn ("redeclaration of C++ built-in type %qT",
3401 declspecs
->redefined_builtin_type
);
3406 && TYPE_P (declspecs
->type
)
3407 && ((TREE_CODE (declspecs
->type
) != TYPENAME_TYPE
3408 && IS_AGGR_TYPE (declspecs
->type
))
3409 || TREE_CODE (declspecs
->type
) == ENUMERAL_TYPE
))
3410 declared_type
= declspecs
->type
;
3411 else if (declspecs
->type
== error_mark_node
)
3413 if (declared_type
== NULL_TREE
&& ! saw_friend
&& !error_p
)
3414 pedwarn ("declaration does not declare anything");
3415 /* Check for an anonymous union. */
3416 else if (declared_type
&& IS_AGGR_TYPE_CODE (TREE_CODE (declared_type
))
3417 && TYPE_ANONYMOUS_P (declared_type
))
3419 /* 7/3 In a simple-declaration, the optional init-declarator-list
3420 can be omitted only when declaring a class (clause 9) or
3421 enumeration (7.2), that is, when the decl-specifier-seq contains
3422 either a class-specifier, an elaborated-type-specifier with
3423 a class-key (9.1), or an enum-specifier. In these cases and
3424 whenever a class-specifier or enum-specifier is present in the
3425 decl-specifier-seq, the identifiers in these specifiers are among
3426 the names being declared by the declaration (as class-name,
3427 enum-names, or enumerators, depending on the syntax). In such
3428 cases, and except for the declaration of an unnamed bit-field (9.6),
3429 the decl-specifier-seq shall introduce one or more names into the
3430 program, or shall redeclare a name introduced by a previous
3431 declaration. [Example:
3432 enum { }; // ill-formed
3433 typedef class { }; // ill-formed
3437 error ("missing type-name in typedef-declaration");
3440 /* Anonymous unions are objects, so they can have specifiers. */;
3441 SET_ANON_AGGR_TYPE_P (declared_type
);
3443 if (TREE_CODE (declared_type
) != UNION_TYPE
&& pedantic
3444 && !in_system_header
)
3445 pedwarn ("ISO C++ prohibits anonymous structs");
3450 if (declspecs
->specs
[(int)ds_inline
]
3451 || declspecs
->specs
[(int)ds_virtual
])
3452 error ("%qs can only be specified for functions",
3453 declspecs
->specs
[(int)ds_inline
]
3454 ? "inline" : "virtual");
3456 && (!current_class_type
3457 || current_scope () != current_class_type
))
3458 error ("%<friend%> can only be specified inside a class");
3459 else if (declspecs
->specs
[(int)ds_explicit
])
3460 error ("%<explicit%> can only be specified for constructors");
3461 else if (declspecs
->storage_class
)
3462 error ("a storage class can only be specified for objects "
3464 else if (declspecs
->specs
[(int)ds_const
]
3465 || declspecs
->specs
[(int)ds_volatile
]
3466 || declspecs
->specs
[(int)ds_restrict
]
3467 || declspecs
->specs
[(int)ds_thread
])
3468 error ("qualifiers can only be specified for objects "
3472 return declared_type
;
3475 /* Called when a declaration is seen that contains no names to declare.
3476 If its type is a reference to a structure, union or enum inherited
3477 from a containing scope, shadow that tag name for the current scope
3478 with a forward reference.
3479 If its type defines a new named structure or union
3480 or defines an enum, it is valid but we need not do anything here.
3481 Otherwise, it is an error.
3483 C++: may have to grok the declspecs to learn about static,
3484 complain for anonymous unions.
3486 Returns the TYPE declared -- or NULL_TREE if none. */
3489 shadow_tag (cp_decl_specifier_seq
*declspecs
)
3491 tree t
= check_tag_decl (declspecs
);
3496 if (declspecs
->attributes
)
3498 cp_warning_at ("attribute ignored in declaration of %q#T", t
);
3499 cp_warning_at ("attribute for %q#T must follow the %qs keyword",
3501 class_key_or_enum_as_string (t
));
3505 maybe_process_partial_specialization (t
);
3507 /* This is where the variables in an anonymous union are
3508 declared. An anonymous union declaration looks like:
3510 because there is no declarator after the union, the parser
3511 sends that declaration here. */
3512 if (ANON_AGGR_TYPE_P (t
))
3514 fixup_anonymous_aggr (t
);
3516 if (TYPE_FIELDS (t
))
3518 tree decl
= grokdeclarator (/*declarator=*/NULL
,
3519 declspecs
, NORMAL
, 0, NULL
);
3520 finish_anon_union (decl
);
3527 /* Decode a "typename", such as "int **", returning a ..._TYPE node. */
3530 groktypename (cp_decl_specifier_seq
*type_specifiers
,
3531 const cp_declarator
*declarator
)
3535 attrs
= type_specifiers
->attributes
;
3536 type_specifiers
->attributes
= NULL_TREE
;
3537 type
= grokdeclarator (declarator
, type_specifiers
, TYPENAME
, 0, &attrs
);
3539 cplus_decl_attributes (&type
, attrs
, 0);
3543 /* Decode a declarator in an ordinary declaration or data definition.
3544 This is called as soon as the type information and variable name
3545 have been parsed, before parsing the initializer if any.
3546 Here we create the ..._DECL node, fill in its type,
3547 and put it on the list of decls for the current context.
3548 The ..._DECL node is returned as the value.
3550 Exception: for arrays where the length is not specified,
3551 the type is left null, to be filled in by `cp_finish_decl'.
3553 Function definitions do not come here; they go to start_function
3554 instead. However, external and forward declarations of functions
3555 do go through here. Structure field declarations are done by
3556 grokfield and not through here. */
3559 start_decl (const cp_declarator
*declarator
,
3560 cp_decl_specifier_seq
*declspecs
,
3563 tree prefix_attributes
,
3564 tree
*pushed_scope_p
)
3570 *pushed_scope_p
= NULL_TREE
;
3572 /* This should only be done once on the top most decl. */
3573 if (have_extern_spec
)
3575 declspecs
->storage_class
= sc_extern
;
3576 have_extern_spec
= false;
3579 /* An object declared as __attribute__((deprecated)) suppresses
3580 warnings of uses of other deprecated items. */
3581 if (lookup_attribute ("deprecated", attributes
))
3582 deprecated_state
= DEPRECATED_SUPPRESS
;
3584 attributes
= chainon (attributes
, prefix_attributes
);
3586 decl
= grokdeclarator (declarator
, declspecs
, NORMAL
, initialized
,
3589 deprecated_state
= DEPRECATED_NORMAL
;
3591 if (decl
== NULL_TREE
|| TREE_CODE (decl
) == VOID_TYPE
)
3592 return error_mark_node
;
3594 type
= TREE_TYPE (decl
);
3596 if (type
== error_mark_node
)
3597 return error_mark_node
;
3599 context
= DECL_CONTEXT (decl
);
3603 *pushed_scope_p
= push_scope (context
);
3605 /* We are only interested in class contexts, later. */
3606 if (TREE_CODE (context
) == NAMESPACE_DECL
)
3607 context
= NULL_TREE
;
3611 /* Is it valid for this decl to have an initializer at all?
3612 If not, set INITIALIZED to zero, which will indirectly
3613 tell `cp_finish_decl' to ignore the initializer once it is parsed. */
3614 switch (TREE_CODE (decl
))
3617 error ("typedef %qD is initialized (use __typeof__ instead)", decl
);
3622 error ("function %q#D is initialized like a variable", decl
);
3632 if (! toplevel_bindings_p ()
3633 && DECL_EXTERNAL (decl
))
3634 warning ("declaration of %q#D has %<extern%> and is initialized",
3636 DECL_EXTERNAL (decl
) = 0;
3637 if (toplevel_bindings_p ())
3638 TREE_STATIC (decl
) = 1;
3640 /* Tell `pushdecl' this is an initialized decl
3641 even though we don't yet have the initializer expression.
3642 Also tell `cp_finish_decl' it may store the real initializer. */
3643 DECL_INITIAL (decl
) = error_mark_node
;
3646 /* Set attributes here so if duplicate decl, will have proper attributes. */
3647 cplus_decl_attributes (&decl
, attributes
, 0);
3649 /* If #pragma weak was used, mark the decl weak now. */
3650 if (global_scope_p (current_binding_level
))
3651 maybe_apply_pragma_weak (decl
);
3653 if (TREE_CODE (decl
) == FUNCTION_DECL
3654 && DECL_DECLARED_INLINE_P (decl
)
3655 && DECL_UNINLINABLE (decl
)
3656 && lookup_attribute ("noinline", DECL_ATTRIBUTES (decl
)))
3657 warning ("%Jinline function %qD given attribute noinline", decl
, decl
);
3659 if (context
&& COMPLETE_TYPE_P (complete_type (context
)))
3661 if (TREE_CODE (decl
) == VAR_DECL
)
3663 tree field
= lookup_field (context
, DECL_NAME (decl
), 0, false);
3664 if (field
== NULL_TREE
|| TREE_CODE (field
) != VAR_DECL
)
3665 error ("%q#D is not a static member of %q#T", decl
, context
);
3668 if (DECL_CONTEXT (field
) != context
)
3670 if (!same_type_p (DECL_CONTEXT (field
), context
))
3671 pedwarn ("ISO C++ does not permit %<%T::%D%> "
3672 "to be defined as %<%T::%D%>",
3673 DECL_CONTEXT (field
), DECL_NAME (decl
),
3674 context
, DECL_NAME (decl
));
3675 DECL_CONTEXT (decl
) = DECL_CONTEXT (field
);
3677 if (processing_specialization
3678 && template_class_depth (context
) == 0
3679 && CLASSTYPE_TEMPLATE_SPECIALIZATION (context
))
3680 error ("template header not allowed in member definition "
3681 "of explicitly specialized class");
3682 /* Static data member are tricky; an in-class initialization
3683 still doesn't provide a definition, so the in-class
3684 declaration will have DECL_EXTERNAL set, but will have an
3685 initialization. Thus, duplicate_decls won't warn
3686 about this situation, and so we check here. */
3687 if (DECL_INITIAL (decl
) && DECL_INITIAL (field
))
3688 error ("duplicate initialization of %qD", decl
);
3689 if (duplicate_decls (decl
, field
))
3695 tree field
= check_classfn (context
, decl
,
3696 (processing_template_decl
3697 > template_class_depth (context
))
3698 ? current_template_parms
3700 if (field
&& duplicate_decls (decl
, field
))
3704 /* cp_finish_decl sets DECL_EXTERNAL if DECL_IN_AGGR_P is set. */
3705 DECL_IN_AGGR_P (decl
) = 0;
3706 if ((DECL_LANG_SPECIFIC (decl
) && DECL_USE_TEMPLATE (decl
))
3707 || CLASSTYPE_TEMPLATE_INSTANTIATION (context
))
3709 /* Do not mark DECL as an explicit specialization if it was
3710 not already marked as an instantiation; a declaration
3711 should never be marked as a specialization unless we know
3712 what template is being specialized. */
3713 if (DECL_LANG_SPECIFIC (decl
) && DECL_USE_TEMPLATE (decl
))
3714 SET_DECL_TEMPLATE_SPECIALIZATION (decl
);
3715 /* [temp.expl.spec] An explicit specialization of a static data
3716 member of a template is a definition if the declaration
3717 includes an initializer; otherwise, it is a declaration.
3719 We check for processing_specialization so this only applies
3720 to the new specialization syntax. */
3721 if (DECL_INITIAL (decl
) == NULL_TREE
&& processing_specialization
)
3722 DECL_EXTERNAL (decl
) = 1;
3725 if (DECL_EXTERNAL (decl
) && ! DECL_TEMPLATE_SPECIALIZATION (decl
))
3726 pedwarn ("declaration of %q#D outside of class is not definition",
3730 /* Enter this declaration into the symbol table. */
3731 tem
= maybe_push_decl (decl
);
3733 if (processing_template_decl
)
3734 tem
= push_template_decl (tem
);
3735 if (tem
== error_mark_node
)
3736 return error_mark_node
;
3738 #if ! defined (ASM_OUTPUT_BSS) && ! defined (ASM_OUTPUT_ALIGNED_BSS)
3739 /* Tell the back-end to use or not use .common as appropriate. If we say
3740 -fconserve-space, we want this to save .data space, at the expense of
3741 wrong semantics. If we say -fno-conserve-space, we want this to
3742 produce errors about redefs; to do this we force variables into the
3744 DECL_COMMON (tem
) = ((TREE_CODE (tem
) != VAR_DECL
3745 || !DECL_THREAD_LOCAL (tem
))
3746 && (flag_conserve_space
|| ! TREE_PUBLIC (tem
)));
3749 if (! processing_template_decl
)
3756 start_decl_1 (tree decl
)
3758 tree type
= TREE_TYPE (decl
);
3759 int initialized
= (DECL_INITIAL (decl
) != NULL_TREE
);
3761 if (type
== error_mark_node
)
3765 /* Is it valid for this decl to have an initializer at all?
3766 If not, set INITIALIZED to zero, which will indirectly
3767 tell `cp_finish_decl' to ignore the initializer once it is parsed. */
3769 /* Don't allow initializations for incomplete types except for
3770 arrays which might be completed by the initialization. */
3771 if (COMPLETE_TYPE_P (complete_type (type
)))
3772 ; /* A complete type is ok. */
3773 else if (TREE_CODE (type
) != ARRAY_TYPE
)
3775 error ("variable %q#D has initializer but incomplete type", decl
);
3777 type
= TREE_TYPE (decl
) = error_mark_node
;
3779 else if (!COMPLETE_TYPE_P (complete_type (TREE_TYPE (type
))))
3781 if (DECL_LANG_SPECIFIC (decl
) && DECL_TEMPLATE_INFO (decl
))
3782 error ("elements of array %q#D have incomplete type", decl
);
3783 /* else we already gave an error in start_decl. */
3789 && TREE_CODE (decl
) != TYPE_DECL
3790 && TREE_CODE (decl
) != TEMPLATE_DECL
3791 && type
!= error_mark_node
3792 && IS_AGGR_TYPE (type
)
3793 && ! DECL_EXTERNAL (decl
))
3795 if ((! processing_template_decl
|| ! uses_template_parms (type
))
3796 && !COMPLETE_TYPE_P (complete_type (type
)))
3798 error ("aggregate %q#D has incomplete type and cannot be defined",
3800 /* Change the type so that assemble_variable will give
3801 DECL an rtl we can live with: (mem (const_int 0)). */
3802 type
= TREE_TYPE (decl
) = error_mark_node
;
3806 /* If any base type in the hierarchy of TYPE needs a constructor,
3807 then we set initialized to 1. This way any nodes which are
3808 created for the purposes of initializing this aggregate
3809 will live as long as it does. This is necessary for global
3810 aggregates which do not have their initializers processed until
3811 the end of the file. */
3812 initialized
= TYPE_NEEDS_CONSTRUCTING (type
);
3817 DECL_INITIAL (decl
) = NULL_TREE
;
3819 /* Create a new scope to hold this declaration if necessary.
3820 Whether or not a new scope is necessary cannot be determined
3821 until after the type has been completed; if the type is a
3822 specialization of a class template it is not until after
3823 instantiation has occurred that TYPE_HAS_NONTRIVIAL_DESTRUCTOR
3824 will be set correctly. */
3825 maybe_push_cleanup_level (type
);
3828 /* Handle initialization of references. DECL, TYPE, and INIT have the
3829 same meaning as in cp_finish_decl. *CLEANUP must be NULL on entry,
3830 but will be set to a new CLEANUP_STMT if a temporary is created
3831 that must be destroyed subsequently.
3833 Returns an initializer expression to use to initialize DECL, or
3834 NULL if the initialization can be performed statically.
3836 Quotes on semantics can be found in ARM 8.4.3. */
3839 grok_reference_init (tree decl
, tree type
, tree init
, tree
*cleanup
)
3843 if (init
== NULL_TREE
)
3845 if ((DECL_LANG_SPECIFIC (decl
) == 0
3846 || DECL_IN_AGGR_P (decl
) == 0)
3847 && ! DECL_THIS_EXTERN (decl
))
3848 error ("%qD declared as reference but not initialized", decl
);
3852 if (TREE_CODE (init
) == CONSTRUCTOR
)
3854 error ("ISO C++ forbids use of initializer list to "
3855 "initialize reference %qD", decl
);
3859 if (TREE_CODE (init
) == TREE_LIST
)
3860 init
= build_x_compound_expr_from_list (init
, "initializer");
3862 if (TREE_CODE (TREE_TYPE (type
)) != ARRAY_TYPE
3863 && TREE_CODE (TREE_TYPE (init
)) == ARRAY_TYPE
)
3864 /* Note: default conversion is only called in very special cases. */
3865 init
= decay_conversion (init
);
3867 /* Convert INIT to the reference type TYPE. This may involve the
3868 creation of a temporary, whose lifetime must be the same as that
3869 of the reference. If so, a DECL_EXPR for the temporary will be
3870 added just after the DECL_EXPR for DECL. That's why we don't set
3871 DECL_INITIAL for local references (instead assigning to them
3872 explicitly); we need to allow the temporary to be initialized
3874 tmp
= initialize_reference (type
, init
, decl
, cleanup
);
3876 if (tmp
== error_mark_node
)
3878 else if (tmp
== NULL_TREE
)
3880 error ("cannot initialize %qT from %qT", type
, TREE_TYPE (init
));
3884 if (TREE_STATIC (decl
) && !TREE_CONSTANT (tmp
))
3887 DECL_INITIAL (decl
) = tmp
;
3892 /* When parsing `int a[] = {1, 2};' we don't know the size of the
3893 array until we finish parsing the initializer. If that's the
3894 situation we're in, update DECL accordingly. */
3897 maybe_deduce_size_from_array_init (tree decl
, tree init
)
3899 tree type
= TREE_TYPE (decl
);
3901 if (TREE_CODE (type
) == ARRAY_TYPE
3902 && TYPE_DOMAIN (type
) == NULL_TREE
3903 && TREE_CODE (decl
) != TYPE_DECL
)
3905 /* do_default is really a C-ism to deal with tentative definitions.
3906 But let's leave it here to ease the eventual merge. */
3907 int do_default
= !DECL_EXTERNAL (decl
);
3908 tree initializer
= init
? init
: DECL_INITIAL (decl
);
3909 int failure
= complete_array_type (type
, initializer
, do_default
);
3912 error ("initializer fails to determine size of %qD", decl
);
3917 error ("array size missing in %qD", decl
);
3918 /* If a `static' var's size isn't known, make it extern as
3919 well as static, so it does not get allocated. If it's not
3920 `static', then don't mark it extern; finish_incomplete_decl
3921 will give it a default size and it will get allocated. */
3922 else if (!pedantic
&& TREE_STATIC (decl
) && !TREE_PUBLIC (decl
))
3923 DECL_EXTERNAL (decl
) = 1;
3926 if (pedantic
&& TYPE_DOMAIN (type
) != NULL_TREE
3927 && tree_int_cst_lt (TYPE_MAX_VALUE (TYPE_DOMAIN (type
)),
3929 error ("zero-size array %qD", decl
);
3931 layout_decl (decl
, 0);
3935 /* Set DECL_SIZE, DECL_ALIGN, etc. for DECL (a VAR_DECL), and issue
3936 any appropriate error messages regarding the layout. */
3939 layout_var_decl (tree decl
)
3941 tree type
= TREE_TYPE (decl
);
3943 tree ttype
= target_type (type
);
3946 /* If we haven't already layed out this declaration, do so now.
3947 Note that we must not call complete type for an external object
3948 because it's type might involve templates that we are not
3949 supposed to instantiate yet. (And it's perfectly valid to say
3950 `extern X x' for some incomplete type `X'.) */
3951 if (!DECL_EXTERNAL (decl
))
3952 complete_type (type
);
3953 if (!DECL_SIZE (decl
)
3954 && TREE_TYPE (decl
) != error_mark_node
3955 && (COMPLETE_TYPE_P (type
)
3956 || (TREE_CODE (type
) == ARRAY_TYPE
3957 && !TYPE_DOMAIN (type
)
3958 && COMPLETE_TYPE_P (TREE_TYPE (type
)))))
3959 layout_decl (decl
, 0);
3961 if (!DECL_EXTERNAL (decl
) && DECL_SIZE (decl
) == NULL_TREE
)
3963 /* An automatic variable with an incomplete type: that is an error.
3964 Don't talk about array types here, since we took care of that
3965 message in grokdeclarator. */
3966 error ("storage size of %qD isn't known", decl
);
3967 TREE_TYPE (decl
) = error_mark_node
;
3970 /* Keep this code around in case we later want to control debug info
3971 based on whether a type is "used". (jason 1999-11-11) */
3973 else if (!DECL_EXTERNAL (decl
) && IS_AGGR_TYPE (ttype
))
3974 /* Let debugger know it should output info for this type. */
3975 note_debug_info_needed (ttype
);
3977 if (TREE_STATIC (decl
) && DECL_CLASS_SCOPE_P (decl
))
3978 note_debug_info_needed (DECL_CONTEXT (decl
));
3981 if ((DECL_EXTERNAL (decl
) || TREE_STATIC (decl
))
3982 && DECL_SIZE (decl
) != NULL_TREE
3983 && ! TREE_CONSTANT (DECL_SIZE (decl
)))
3985 if (TREE_CODE (DECL_SIZE (decl
)) == INTEGER_CST
)
3986 constant_expression_warning (DECL_SIZE (decl
));
3988 error ("storage size of %qD isn't constant", decl
);
3991 if (TREE_STATIC (decl
)
3992 && !DECL_ARTIFICIAL (decl
)
3993 && current_function_decl
3994 && DECL_CONTEXT (decl
) == current_function_decl
)
3995 push_local_name (decl
);
3998 /* If a local static variable is declared in an inline function, or if
3999 we have a weak definition, we must endeavor to create only one
4000 instance of the variable at link-time. */
4003 maybe_commonize_var (tree decl
)
4005 /* Static data in a function with comdat linkage also has comdat
4007 if (TREE_STATIC (decl
)
4008 /* Don't mess with __FUNCTION__. */
4009 && ! DECL_ARTIFICIAL (decl
)
4010 && DECL_FUNCTION_SCOPE_P (decl
)
4011 /* Unfortunately, import_export_decl has not always been called
4012 before the function is processed, so we cannot simply check
4014 && (DECL_COMDAT (DECL_CONTEXT (decl
))
4015 || ((DECL_DECLARED_INLINE_P (DECL_CONTEXT (decl
))
4016 || DECL_TEMPLATE_INSTANTIATION (DECL_CONTEXT (decl
)))
4017 && TREE_PUBLIC (DECL_CONTEXT (decl
)))))
4021 /* With weak symbols, we simply make the variable COMDAT;
4022 that will cause copies in multiple translations units to
4024 comdat_linkage (decl
);
4028 if (DECL_INITIAL (decl
) == NULL_TREE
4029 || DECL_INITIAL (decl
) == error_mark_node
)
4031 /* Without weak symbols, we can use COMMON to merge
4032 uninitialized variables. */
4033 TREE_PUBLIC (decl
) = 1;
4034 DECL_COMMON (decl
) = 1;
4038 /* While for initialized variables, we must use internal
4039 linkage -- which means that multiple copies will not
4041 TREE_PUBLIC (decl
) = 0;
4042 DECL_COMMON (decl
) = 0;
4043 cp_warning_at ("sorry: semantics of inline function static "
4044 "data %q#D are wrong (you'll wind up "
4045 "with multiple copies)", decl
);
4046 warning ("%J you can work around this by removing "
4052 else if (DECL_LANG_SPECIFIC (decl
) && DECL_COMDAT (decl
))
4053 /* Set it up again; we might have set DECL_INITIAL since the last
4055 comdat_linkage (decl
);
4058 /* Issue an error message if DECL is an uninitialized const variable. */
4061 check_for_uninitialized_const_var (tree decl
)
4063 tree type
= TREE_TYPE (decl
);
4065 /* ``Unless explicitly declared extern, a const object does not have
4066 external linkage and must be initialized. ($8.4; $12.1)'' ARM
4068 if (TREE_CODE (decl
) == VAR_DECL
4069 && TREE_CODE (type
) != REFERENCE_TYPE
4070 && CP_TYPE_CONST_P (type
)
4071 && !TYPE_NEEDS_CONSTRUCTING (type
)
4072 && !DECL_INITIAL (decl
))
4073 error ("uninitialized const %qD", decl
);
4076 /* FIELD is a FIELD_DECL or NULL. In the former case, the value
4077 returned is the next FIELD_DECL (possibly FIELD itself) that can be
4078 initialized. If there are no more such fields, the return value
4082 next_initializable_field (tree field
)
4085 && (TREE_CODE (field
) != FIELD_DECL
4086 || (DECL_C_BIT_FIELD (field
) && !DECL_NAME (field
))
4087 || DECL_ARTIFICIAL (field
)))
4088 field
= TREE_CHAIN (field
);
4093 /* Subroutine of reshape_init. Reshape the constructor for an array. INITP
4094 is the pointer to the old constructor list (to the CONSTRUCTOR_ELTS of
4095 the CONSTRUCTOR we are processing), while NEW_INIT is the CONSTRUCTOR we
4097 ELT_TYPE is the element type of the array. MAX_INDEX is an INTEGER_CST
4098 representing the size of the array minus one (the maximum index), or
4099 NULL_TREE if the array was declared without specifying the size. */
4102 reshape_init_array (tree elt_type
, tree max_index
,
4103 tree
*initp
, tree new_init
)
4105 bool sized_array_p
= (max_index
!= NULL_TREE
);
4106 HOST_WIDE_INT max_index_cst
= 0;
4107 HOST_WIDE_INT index
;
4110 /* HWI is either 32bit or 64bit, so it must be enough to represent the
4112 max_index_cst
= tree_low_cst (max_index
, 1);
4114 /* Loop until there are no more initializers. */
4116 *initp
&& (!sized_array_p
|| index
<= max_index_cst
);
4120 tree designated_index
;
4122 element_init
= reshape_init (elt_type
, initp
);
4123 if (element_init
== error_mark_node
)
4125 TREE_CHAIN (element_init
) = CONSTRUCTOR_ELTS (new_init
);
4126 CONSTRUCTOR_ELTS (new_init
) = element_init
;
4127 designated_index
= TREE_PURPOSE (element_init
);
4128 if (designated_index
)
4130 /* Handle array designated initializers (GNU extension). */
4131 if (TREE_CODE (designated_index
) == IDENTIFIER_NODE
)
4133 error ("name %qD used in a GNU-style designated "
4134 "initializer for an array", designated_index
);
4135 TREE_PURPOSE (element_init
) = NULL_TREE
;
4139 gcc_assert (TREE_CODE (designated_index
) == INTEGER_CST
);
4141 && tree_int_cst_lt (max_index
, designated_index
))
4143 error ("Designated initializer %qE larger than array "
4144 "size", designated_index
);
4145 TREE_PURPOSE (element_init
) = NULL_TREE
;
4148 index
= tree_low_cst (designated_index
, 1);
4156 /* Undo the brace-elision allowed by [dcl.init.aggr] in a
4157 brace-enclosed aggregate initializer.
4159 *INITP is one of a list of initializers describing a brace-enclosed
4160 initializer for an entity of the indicated aggregate TYPE. It may
4161 not presently match the shape of the TYPE; for example:
4163 struct S { int a; int b; };
4164 struct S a[] = { 1, 2, 3, 4 };
4166 Here *INITP will point to TREE_LIST of four elements, rather than a
4167 list of two elements, each itself a list of two elements. This
4168 routine transforms INIT from the former form into the latter. The
4169 revised initializer is returned. */
4172 reshape_init (tree type
, tree
*initp
)
4176 tree old_init_value
;
4178 bool brace_enclosed_p
;
4182 old_init_value
= (TREE_CODE (*initp
) == TREE_LIST
4183 ? TREE_VALUE (*initp
) : old_init
);
4185 gcc_assert (old_init_value
);
4187 /* If the initializer is brace-enclosed, pull initializers from the
4188 enclosed elements. Advance past the brace-enclosed initializer
4190 if (TREE_CODE (old_init_value
) == CONSTRUCTOR
4191 && BRACE_ENCLOSED_INITIALIZER_P (old_init_value
))
4193 *initp
= TREE_CHAIN (old_init
);
4194 TREE_CHAIN (old_init
) = NULL_TREE
;
4195 inits
= CONSTRUCTOR_ELTS (old_init_value
);
4197 brace_enclosed_p
= true;
4202 brace_enclosed_p
= false;
4205 /* A non-aggregate type is always initialized with a single
4207 if (!CP_AGGREGATE_TYPE_P (type
))
4209 *initp
= TREE_CHAIN (old_init
);
4210 TREE_CHAIN (old_init
) = NULL_TREE
;
4211 /* It is invalid to initialize a non-aggregate type with a
4212 brace-enclosed initializer. */
4213 if (brace_enclosed_p
)
4215 error ("brace-enclosed initializer used to initialize %qT",
4217 if (TREE_CODE (old_init
) == TREE_LIST
)
4218 TREE_VALUE (old_init
) = error_mark_node
;
4220 old_init
= error_mark_node
;
4228 All implicit type conversions (clause _conv_) are considered when
4229 initializing the aggregate member with an initializer from an
4230 initializer-list. If the initializer can initialize a member,
4231 the member is initialized. Otherwise, if the member is itself a
4232 non-empty subaggregate, brace elision is assumed and the
4233 initializer is considered for the initialization of the first
4234 member of the subaggregate. */
4235 if (!brace_enclosed_p
4236 && can_convert_arg (type
, TREE_TYPE (old_init_value
), old_init_value
))
4238 *initp
= TREE_CHAIN (old_init
);
4239 TREE_CHAIN (old_init
) = NULL_TREE
;
4243 string_init_p
= false;
4244 if (TREE_CODE (old_init_value
) == STRING_CST
4245 && TREE_CODE (type
) == ARRAY_TYPE
4246 && char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (type
))))
4248 /* [dcl.init.string]
4250 A char array (whether plain char, signed char, or unsigned char)
4251 can be initialized by a string-literal (optionally enclosed in
4252 braces); a wchar_t array can be initialized by a wide
4253 string-literal (optionally enclosed in braces). */
4254 new_init
= old_init
;
4255 /* Move past the initializer. */
4256 *initp
= TREE_CHAIN (old_init
);
4257 TREE_CHAIN (old_init
) = NULL_TREE
;
4258 string_init_p
= true;
4262 /* Build a CONSTRUCTOR to hold the contents of the aggregate. */
4263 new_init
= build_constructor (NULL_TREE
, NULL_TREE
);
4265 if (CLASS_TYPE_P (type
))
4269 field
= next_initializable_field (TYPE_FIELDS (type
));
4275 An initializer for an aggregate member that is an
4276 empty class shall have the form of an empty
4277 initializer-list {}. */
4278 if (!brace_enclosed_p
)
4280 error ("initializer for %qT must be brace-enclosed", type
);
4281 return error_mark_node
;
4286 /* Loop through the initializable fields, gathering
4292 /* Handle designated initializers, as an extension. */
4293 if (TREE_PURPOSE (*initp
))
4296 pedwarn ("ISO C++ does not allow designated initializers");
4297 field
= lookup_field_1 (type
, TREE_PURPOSE (*initp
),
4298 /*want_type=*/false);
4299 if (!field
|| TREE_CODE (field
) != FIELD_DECL
)
4300 error ("%qT has no non-static data member named %qD",
4301 type
, TREE_PURPOSE (*initp
));
4306 field_init
= reshape_init (TREE_TYPE (field
), initp
);
4307 if (field_init
== error_mark_node
)
4308 return error_mark_node
;
4309 TREE_CHAIN (field_init
) = CONSTRUCTOR_ELTS (new_init
);
4310 CONSTRUCTOR_ELTS (new_init
) = field_init
;
4313 When a union is initialized with a brace-enclosed
4314 initializer, the braces shall only contain an
4315 initializer for the first member of the union. */
4316 if (TREE_CODE (type
) == UNION_TYPE
)
4318 field
= next_initializable_field (TREE_CHAIN (field
));
4322 else if (TREE_CODE (type
) == ARRAY_TYPE
4323 || TREE_CODE (type
) == VECTOR_TYPE
)
4325 /* If the bound of the array is known, take no more initializers
4326 than are allowed. */
4327 tree max_index
= NULL_TREE
;
4328 if (TREE_CODE (type
) == ARRAY_TYPE
)
4330 if (TYPE_DOMAIN (type
))
4331 max_index
= array_type_nelts (type
);
4335 /* For a vector, the representation type is a struct
4336 containing a single member which is an array of the
4337 appropriate size. */
4338 tree rtype
= TYPE_DEBUG_REPRESENTATION_TYPE (type
);
4339 if (rtype
&& TYPE_DOMAIN (TREE_TYPE (TYPE_FIELDS (rtype
))))
4340 max_index
= array_type_nelts (TREE_TYPE (TYPE_FIELDS
4344 if (!reshape_init_array (TREE_TYPE (type
), max_index
,
4346 return error_mark_node
;
4351 /* The initializers were placed in reverse order in the
4353 CONSTRUCTOR_ELTS (new_init
) = nreverse (CONSTRUCTOR_ELTS (new_init
));
4355 if (TREE_CODE (old_init
) == TREE_LIST
)
4356 new_init
= build_tree_list (TREE_PURPOSE (old_init
), new_init
);
4359 /* If there are more initializers than necessary, issue a
4363 if (brace_enclosed_p
)
4364 error ("too many initializers for %qT", type
);
4365 else if (warn_missing_braces
&& !string_init_p
)
4366 warning ("missing braces around initializer");
4372 /* Verify INIT (the initializer for DECL), and record the
4373 initialization in DECL_INITIAL, if appropriate. CLEANUP is as for
4374 grok_reference_init.
4376 If the return value is non-NULL, it is an expression that must be
4377 evaluated dynamically to initialize DECL. */
4380 check_initializer (tree decl
, tree init
, int flags
, tree
*cleanup
)
4382 tree type
= TREE_TYPE (decl
);
4383 tree init_code
= NULL
;
4385 /* If `start_decl' didn't like having an initialization, ignore it now. */
4386 if (init
!= NULL_TREE
&& DECL_INITIAL (decl
) == NULL_TREE
)
4389 /* If an initializer is present, DECL_INITIAL has been
4390 error_mark_node, to indicate that an as-of-yet unevaluated
4391 initialization will occur. From now on, DECL_INITIAL reflects
4392 the static initialization -- if any -- of DECL. */
4393 DECL_INITIAL (decl
) = NULL_TREE
;
4395 /* Things that are going to be initialized need to have complete
4397 TREE_TYPE (decl
) = type
= complete_type (TREE_TYPE (decl
));
4399 if (type
== error_mark_node
)
4400 /* We will have already complained. */
4402 else if (init
&& COMPLETE_TYPE_P (type
)
4403 && !TREE_CONSTANT (TYPE_SIZE (type
)))
4405 error ("variable-sized object %qD may not be initialized", decl
);
4408 else if (TREE_CODE (type
) == ARRAY_TYPE
4409 && !COMPLETE_TYPE_P (complete_type (TREE_TYPE (type
))))
4411 error ("elements of array %q#D have incomplete type", decl
);
4414 else if (TREE_CODE (type
) != ARRAY_TYPE
&& !COMPLETE_TYPE_P (type
))
4416 error ("%qD has incomplete type", decl
);
4417 TREE_TYPE (decl
) = error_mark_node
;
4421 if (TREE_CODE (decl
) == CONST_DECL
)
4423 gcc_assert (TREE_CODE (decl
) != REFERENCE_TYPE
);
4425 DECL_INITIAL (decl
) = init
;
4427 gcc_assert (init
!= NULL_TREE
);
4430 else if (!DECL_EXTERNAL (decl
) && TREE_CODE (type
) == REFERENCE_TYPE
)
4431 init
= grok_reference_init (decl
, type
, init
, cleanup
);
4434 if (TREE_CODE (init
) == CONSTRUCTOR
4435 && BRACE_ENCLOSED_INITIALIZER_P (init
))
4437 /* [dcl.init] paragraph 13,
4438 If T is a scalar type, then a declaration of the form
4443 reshape_init will complain about the extra braces,
4444 and doesn't do anything useful in the case where TYPE is
4445 scalar, so just don't call it. */
4446 if (CP_AGGREGATE_TYPE_P (type
))
4447 init
= reshape_init (type
, &init
);
4449 if ((*targetm
.vector_opaque_p
) (type
))
4451 error ("opaque vector types cannot be initialized");
4452 init
= error_mark_node
;
4456 /* If DECL has an array type without a specific bound, deduce the
4457 array size from the initializer. */
4458 maybe_deduce_size_from_array_init (decl
, init
);
4459 type
= TREE_TYPE (decl
);
4461 if (TYPE_HAS_CONSTRUCTOR (type
) || TYPE_NEEDS_CONSTRUCTING (type
))
4463 if (TREE_CODE (type
) == ARRAY_TYPE
)
4464 goto initialize_aggr
;
4465 else if (TREE_CODE (init
) == CONSTRUCTOR
4466 && BRACE_ENCLOSED_INITIALIZER_P (init
))
4468 if (TYPE_NON_AGGREGATE_CLASS (type
))
4470 error ("%qD must be initialized by constructor, "
4473 init
= error_mark_node
;
4476 goto dont_use_constructor
;
4480 int saved_stmts_are_full_exprs_p
;
4483 saved_stmts_are_full_exprs_p
= 0;
4484 if (building_stmt_tree ())
4486 saved_stmts_are_full_exprs_p
= stmts_are_full_exprs_p ();
4487 current_stmt_tree ()->stmts_are_full_exprs_p
= 1;
4489 init
= build_aggr_init (decl
, init
, flags
);
4490 if (building_stmt_tree ())
4491 current_stmt_tree ()->stmts_are_full_exprs_p
=
4492 saved_stmts_are_full_exprs_p
;
4498 dont_use_constructor
:
4499 if (TREE_CODE (init
) != TREE_VEC
)
4501 init_code
= store_init_value (decl
, init
);
4502 if (pedantic
&& TREE_CODE (type
) == ARRAY_TYPE
4503 && DECL_INITIAL (decl
)
4504 && TREE_CODE (DECL_INITIAL (decl
)) == STRING_CST
4505 && PAREN_STRING_LITERAL_P (DECL_INITIAL (decl
)))
4506 warning ("array %qD initialized by parenthesized string literal %qE",
4507 decl
, DECL_INITIAL (decl
));
4512 else if (DECL_EXTERNAL (decl
))
4514 else if (TYPE_P (type
) && TYPE_NEEDS_CONSTRUCTING (type
))
4515 goto initialize_aggr
;
4516 else if (IS_AGGR_TYPE (type
))
4518 tree core_type
= strip_array_types (type
);
4520 if (CLASSTYPE_READONLY_FIELDS_NEED_INIT (core_type
))
4521 error ("structure %qD with uninitialized const members", decl
);
4522 if (CLASSTYPE_REF_FIELDS_NEED_INIT (core_type
))
4523 error ("structure %qD with uninitialized reference members", decl
);
4525 check_for_uninitialized_const_var (decl
);
4528 check_for_uninitialized_const_var (decl
);
4530 if (init
&& init
!= error_mark_node
)
4531 init_code
= build2 (INIT_EXPR
, type
, decl
, init
);
4536 /* If DECL is not a local variable, give it RTL. */
4539 make_rtl_for_nonlocal_decl (tree decl
, tree init
, const char* asmspec
)
4541 int toplev
= toplevel_bindings_p ();
4544 /* Set the DECL_ASSEMBLER_NAME for the object. */
4547 /* The `register' keyword, when used together with an
4548 asm-specification, indicates that the variable should be
4549 placed in a particular register. */
4550 if (TREE_CODE (decl
) == VAR_DECL
&& DECL_REGISTER (decl
))
4552 change_decl_assembler_name (decl
, get_identifier (asmspec
));
4553 DECL_HARD_REGISTER (decl
) = 1;
4557 if (TREE_CODE (decl
) == FUNCTION_DECL
4558 && DECL_BUILT_IN_CLASS (decl
) == BUILT_IN_NORMAL
)
4559 set_builtin_user_assembler_name (decl
, asmspec
);
4560 set_user_assembler_name (decl
, asmspec
);
4564 /* Handle non-variables up front. */
4565 if (TREE_CODE (decl
) != VAR_DECL
)
4567 rest_of_decl_compilation (decl
, toplev
, at_eof
);
4571 /* If we see a class member here, it should be a static data
4573 if (DECL_LANG_SPECIFIC (decl
) && DECL_IN_AGGR_P (decl
))
4575 gcc_assert (TREE_STATIC (decl
));
4576 /* An in-class declaration of a static data member should be
4577 external; it is only a declaration, and not a definition. */
4578 if (init
== NULL_TREE
)
4579 gcc_assert (DECL_EXTERNAL (decl
));
4582 /* We don't create any RTL for local variables. */
4583 if (DECL_FUNCTION_SCOPE_P (decl
) && !TREE_STATIC (decl
))
4586 /* We defer emission of local statics until the corresponding
4587 DECL_EXPR is expanded. */
4588 defer_p
= DECL_FUNCTION_SCOPE_P (decl
) || DECL_VIRTUAL_P (decl
);
4590 /* We try to defer namespace-scope static constants so that they are
4591 not emitted into the object file unnecessarily. */
4592 if (!DECL_VIRTUAL_P (decl
)
4593 && TREE_READONLY (decl
)
4594 && DECL_INITIAL (decl
) != NULL_TREE
4595 && DECL_INITIAL (decl
) != error_mark_node
4596 && ! EMPTY_CONSTRUCTOR_P (DECL_INITIAL (decl
))
4598 && !TREE_PUBLIC (decl
))
4600 /* Fool with the linkage of static consts according to #pragma
4602 struct c_fileinfo
*finfo
= get_fileinfo (lbasename (input_filename
));
4603 if (!finfo
->interface_unknown
&& !TREE_PUBLIC (decl
))
4605 TREE_PUBLIC (decl
) = 1;
4606 DECL_EXTERNAL (decl
) = finfo
->interface_only
;
4611 /* Likewise for template instantiations. */
4612 else if (DECL_LANG_SPECIFIC (decl
)
4613 && DECL_IMPLICIT_INSTANTIATION (decl
))
4616 /* If we're not deferring, go ahead and assemble the variable. */
4618 rest_of_decl_compilation (decl
, toplev
, at_eof
);
4621 /* Generate code to initialize DECL (a local variable). */
4624 initialize_local_var (tree decl
, tree init
)
4626 tree type
= TREE_TYPE (decl
);
4629 gcc_assert (TREE_CODE (decl
) == VAR_DECL
4630 || TREE_CODE (decl
) == RESULT_DECL
);
4631 gcc_assert (!TREE_STATIC (decl
));
4633 if (DECL_SIZE (decl
) == NULL_TREE
)
4635 /* If we used it already as memory, it must stay in memory. */
4636 DECL_INITIAL (decl
) = NULL_TREE
;
4637 TREE_ADDRESSABLE (decl
) = TREE_USED (decl
);
4640 if (DECL_SIZE (decl
) && type
!= error_mark_node
)
4644 /* Compute and store the initial value. */
4645 already_used
= TREE_USED (decl
) || TREE_USED (type
);
4647 /* Perform the initialization. */
4650 int saved_stmts_are_full_exprs_p
;
4652 gcc_assert (building_stmt_tree ());
4653 saved_stmts_are_full_exprs_p
= stmts_are_full_exprs_p ();
4654 current_stmt_tree ()->stmts_are_full_exprs_p
= 1;
4655 finish_expr_stmt (init
);
4656 current_stmt_tree ()->stmts_are_full_exprs_p
=
4657 saved_stmts_are_full_exprs_p
;
4660 /* Set this to 0 so we can tell whether an aggregate which was
4661 initialized was ever used. Don't do this if it has a
4662 destructor, so we don't complain about the 'resource
4663 allocation is initialization' idiom. Now set
4664 attribute((unused)) on types so decls of that type will be
4665 marked used. (see TREE_USED, above.) */
4666 if (TYPE_NEEDS_CONSTRUCTING (type
)
4668 && TYPE_HAS_TRIVIAL_DESTRUCTOR (type
)
4669 && DECL_NAME (decl
))
4670 TREE_USED (decl
) = 0;
4671 else if (already_used
)
4672 TREE_USED (decl
) = 1;
4675 /* Generate a cleanup, if necessary. */
4676 cleanup
= cxx_maybe_build_cleanup (decl
);
4677 if (DECL_SIZE (decl
) && cleanup
)
4678 finish_decl_cleanup (decl
, cleanup
);
4681 /* DECL is a VAR_DECL for a compiler-generated variable with static
4682 storage duration (like a virtual table) whose initializer is a
4683 compile-time constant. Initialize the variable and provide it to
4687 initialize_artificial_var (tree decl
, tree init
)
4689 DECL_INITIAL (decl
) = build_constructor (NULL_TREE
, init
);
4690 DECL_INITIALIZED_P (decl
) = 1;
4691 determine_visibility (decl
);
4692 layout_var_decl (decl
);
4693 maybe_commonize_var (decl
);
4694 make_rtl_for_nonlocal_decl (decl
, init
, /*asmspec=*/NULL
);
4697 /* Finish processing of a declaration;
4698 install its line number and initial value.
4699 If the length of an array type is not known before,
4700 it must be determined now, from the initial value, or it is an error.
4702 INIT holds the value of an initializer that should be allowed to escape
4705 FLAGS is LOOKUP_ONLYCONVERTING if the = init syntax was used, else 0
4706 if the (init) syntax was used. */
4709 cp_finish_decl (tree decl
, tree init
, tree asmspec_tree
, int flags
)
4712 tree ttype
= NULL_TREE
;
4714 const char *asmspec
= NULL
;
4715 int was_readonly
= 0;
4716 bool var_definition_p
= false;
4718 if (decl
== error_mark_node
)
4723 error ("assignment (not initialization) in declaration");
4727 gcc_assert (TREE_CODE (decl
) != RESULT_DECL
);
4729 /* Assume no cleanup is required. */
4730 cleanup
= NULL_TREE
;
4732 /* If a name was specified, get the string. */
4733 if (global_scope_p (current_binding_level
))
4734 asmspec_tree
= maybe_apply_renaming_pragma (decl
, asmspec_tree
);
4736 asmspec
= TREE_STRING_POINTER (asmspec_tree
);
4738 if (init
&& TREE_CODE (init
) == NAMESPACE_DECL
)
4740 error ("cannot initialize %qD to namespace %qD", decl
, init
);
4744 if (current_class_type
4745 && CP_DECL_CONTEXT (decl
) == current_class_type
4746 && TYPE_BEING_DEFINED (current_class_type
)
4747 && (DECL_INITIAL (decl
) || init
))
4748 DECL_INITIALIZED_IN_CLASS_P (decl
) = 1;
4750 type
= TREE_TYPE (decl
);
4752 if (type
== error_mark_node
)
4755 if (processing_template_decl
)
4757 /* Add this declaration to the statement-tree. */
4758 if (at_function_scope_p ())
4759 add_decl_expr (decl
);
4761 if (init
&& DECL_INITIAL (decl
))
4762 DECL_INITIAL (decl
) = init
;
4763 if (TREE_CODE (decl
) == VAR_DECL
4764 && !DECL_PRETTY_FUNCTION_P (decl
)
4765 && !dependent_type_p (TREE_TYPE (decl
)))
4766 maybe_deduce_size_from_array_init (decl
, init
);
4771 /* Parameters are handled by store_parm_decls, not cp_finish_decl. */
4772 gcc_assert (TREE_CODE (decl
) != PARM_DECL
);
4774 /* Take care of TYPE_DECLs up front. */
4775 if (TREE_CODE (decl
) == TYPE_DECL
)
4777 if (type
!= error_mark_node
4778 && IS_AGGR_TYPE (type
) && DECL_NAME (decl
))
4780 if (TREE_TYPE (DECL_NAME (decl
)) && TREE_TYPE (decl
) != type
)
4781 warning ("shadowing previous type declaration of %q#D", decl
);
4782 set_identifier_type_value (DECL_NAME (decl
), decl
);
4785 /* If we have installed this as the canonical typedef for this
4786 type, and that type has not been defined yet, delay emitting
4787 the debug information for it, as we will emit it later. */
4788 if (TYPE_MAIN_DECL (TREE_TYPE (decl
)) == decl
4789 && !COMPLETE_TYPE_P (TREE_TYPE (decl
)))
4790 TYPE_DECL_SUPPRESS_DEBUG (decl
) = 1;
4792 rest_of_decl_compilation (decl
, DECL_CONTEXT (decl
) == NULL_TREE
,
4797 if (TREE_CODE (decl
) != FUNCTION_DECL
)
4798 ttype
= target_type (type
);
4801 /* A reference will be modified here, as it is initialized. */
4802 if (! DECL_EXTERNAL (decl
)
4803 && TREE_READONLY (decl
)
4804 && TREE_CODE (type
) == REFERENCE_TYPE
)
4807 TREE_READONLY (decl
) = 0;
4810 if (TREE_CODE (decl
) == VAR_DECL
)
4812 /* Only PODs can have thread-local storage. Other types may require
4813 various kinds of non-trivial initialization. */
4814 if (DECL_THREAD_LOCAL (decl
) && !pod_type_p (TREE_TYPE (decl
)))
4815 error ("%qD cannot be thread-local because it has non-POD type %qT",
4816 decl
, TREE_TYPE (decl
));
4817 /* Convert the initializer to the type of DECL, if we have not
4818 already initialized DECL. */
4819 if (!DECL_INITIALIZED_P (decl
)
4820 /* If !DECL_EXTERNAL then DECL is being defined. In the
4821 case of a static data member initialized inside the
4822 class-specifier, there can be an initializer even if DECL
4823 is *not* defined. */
4824 && (!DECL_EXTERNAL (decl
) || init
))
4826 init
= check_initializer (decl
, init
, flags
, &cleanup
);
4827 /* Thread-local storage cannot be dynamically initialized. */
4828 if (DECL_THREAD_LOCAL (decl
) && init
)
4830 error ("%qD is thread-local and so cannot be dynamically "
4831 "initialized", decl
);
4838 The memory occupied by any object of static storage
4839 duration is zero-initialized at program startup before
4840 any other initialization takes place.
4842 We cannot create an appropriate initializer until after
4843 the type of DECL is finalized. If DECL_INITIAL is set,
4844 then the DECL is statically initialized, and any
4845 necessary zero-initialization has already been performed. */
4846 if (TREE_STATIC (decl
) && !DECL_INITIAL (decl
))
4847 DECL_INITIAL (decl
) = build_zero_init (TREE_TYPE (decl
),
4848 /*nelts=*/NULL_TREE
,
4849 /*static_storage_p=*/true);
4850 /* Remember that the initialization for this variable has
4852 DECL_INITIALIZED_P (decl
) = 1;
4853 /* This declaration is the definition of this variable,
4854 unless we are initializing a static data member within
4855 the class specifier. */
4856 if (!DECL_EXTERNAL (decl
))
4857 var_definition_p
= true;
4858 /* The variable is being defined, so determine its
4860 determine_visibility (decl
);
4862 /* If the variable has an array type, lay out the type, even if
4863 there is no initializer. It is valid to index through the
4864 array, and we must get TYPE_ALIGN set correctly on the array
4866 else if (TREE_CODE (type
) == ARRAY_TYPE
)
4870 /* Add this declaration to the statement-tree. This needs to happen
4871 after the call to check_initializer so that the DECL_EXPR for a
4872 reference temp is added before the DECL_EXPR for the reference itself. */
4873 if (at_function_scope_p ())
4874 add_decl_expr (decl
);
4876 if (TREE_CODE (decl
) == VAR_DECL
)
4877 layout_var_decl (decl
);
4879 /* Output the assembler code and/or RTL code for variables and functions,
4880 unless the type is an undefined structure or union.
4881 If not, it will get done when the type is completed. */
4882 if (TREE_CODE (decl
) == VAR_DECL
|| TREE_CODE (decl
) == FUNCTION_DECL
)
4884 if (TREE_CODE (decl
) == VAR_DECL
)
4885 maybe_commonize_var (decl
);
4887 make_rtl_for_nonlocal_decl (decl
, init
, asmspec
);
4889 /* Check for abstractness of the type. Notice that there is no
4890 need to strip array types here since the check for those types
4891 is already done within create_array_type_for_decl. */
4892 if (TREE_CODE (type
) == FUNCTION_TYPE
4893 || TREE_CODE (type
) == METHOD_TYPE
)
4894 abstract_virtuals_error (decl
, TREE_TYPE (type
));
4896 abstract_virtuals_error (decl
, type
);
4898 if (TREE_CODE (decl
) == FUNCTION_DECL
4899 || TREE_TYPE (decl
) == error_mark_node
)
4900 /* No initialization required. */
4902 else if (DECL_EXTERNAL (decl
)
4903 && ! (DECL_LANG_SPECIFIC (decl
)
4904 && DECL_NOT_REALLY_EXTERN (decl
)))
4907 DECL_INITIAL (decl
) = init
;
4911 /* A variable definition. */
4912 if (DECL_FUNCTION_SCOPE_P (decl
))
4914 /* Initialize the local variable. */
4915 if (processing_template_decl
)
4917 if (init
|| DECL_INITIAL (decl
) == error_mark_node
)
4918 DECL_INITIAL (decl
) = init
;
4920 else if (!TREE_STATIC (decl
))
4921 initialize_local_var (decl
, init
);
4924 /* If a variable is defined, and then a subsequent
4925 definition with external linkage is encountered, we will
4926 get here twice for the same variable. We want to avoid
4927 calling expand_static_init more than once. For variables
4928 that are not static data members, we can call
4929 expand_static_init only when we actually process the
4930 initializer. It is not legal to redeclare a static data
4931 member, so this issue does not arise in that case. */
4932 if (var_definition_p
&& TREE_STATIC (decl
))
4933 expand_static_init (decl
, init
);
4937 /* If a CLEANUP_STMT was created to destroy a temporary bound to a
4938 reference, insert it in the statement-tree now. */
4940 push_cleanup (decl
, cleanup
, false);
4945 TREE_READONLY (decl
) = 1;
4947 /* If this was marked 'used', be sure it will be output. */
4948 if (lookup_attribute ("used", DECL_ATTRIBUTES (decl
)))
4949 mark_decl_referenced (decl
);
4952 /* This is here for a midend callback from c-common.c. */
4955 finish_decl (tree decl
, tree init
, tree asmspec_tree
)
4957 cp_finish_decl (decl
, init
, asmspec_tree
, 0);
4960 /* Returns a declaration for a VAR_DECL as if:
4962 extern "C" TYPE NAME;
4964 had been seen. Used to create compiler-generated global
4968 declare_global_var (tree name
, tree type
)
4972 push_to_top_level ();
4973 decl
= build_decl (VAR_DECL
, name
, type
);
4974 TREE_PUBLIC (decl
) = 1;
4975 DECL_EXTERNAL (decl
) = 1;
4976 DECL_ARTIFICIAL (decl
) = 1;
4977 /* If the user has explicitly declared this variable (perhaps
4978 because the code we are compiling is part of a low-level runtime
4979 library), then it is possible that our declaration will be merged
4980 with theirs by pushdecl. */
4981 decl
= pushdecl (decl
);
4982 cp_finish_decl (decl
, NULL_TREE
, NULL_TREE
, 0);
4983 pop_from_top_level ();
4988 /* Returns a pointer to the `atexit' function. Note that if
4989 FLAG_USE_CXA_ATEXIT is nonzero, then this will actually be the new
4990 `__cxa_atexit' function specified in the IA64 C++ ABI. */
4993 get_atexit_node (void)
5004 if (flag_use_cxa_atexit
)
5006 /* The declaration for `__cxa_atexit' is:
5008 int __cxa_atexit (void (*)(void *), void *, void *)
5010 We build up the argument types and then then function type
5013 /* First, build the pointer-to-function type for the first
5015 arg_types
= tree_cons (NULL_TREE
, ptr_type_node
, void_list_node
);
5016 fn_type
= build_function_type (void_type_node
, arg_types
);
5017 fn_ptr_type
= build_pointer_type (fn_type
);
5018 /* Then, build the rest of the argument types. */
5019 arg_types
= tree_cons (NULL_TREE
, ptr_type_node
, void_list_node
);
5020 arg_types
= tree_cons (NULL_TREE
, ptr_type_node
, arg_types
);
5021 arg_types
= tree_cons (NULL_TREE
, fn_ptr_type
, arg_types
);
5022 /* And the final __cxa_atexit type. */
5023 fn_type
= build_function_type (integer_type_node
, arg_types
);
5024 fn_ptr_type
= build_pointer_type (fn_type
);
5025 name
= "__cxa_atexit";
5029 /* The declaration for `atexit' is:
5031 int atexit (void (*)());
5033 We build up the argument types and then then function type
5035 fn_type
= build_function_type (void_type_node
, void_list_node
);
5036 fn_ptr_type
= build_pointer_type (fn_type
);
5037 arg_types
= tree_cons (NULL_TREE
, fn_ptr_type
, void_list_node
);
5038 /* Build the final atexit type. */
5039 fn_type
= build_function_type (integer_type_node
, arg_types
);
5043 /* Now, build the function declaration. */
5044 push_lang_context (lang_name_c
);
5045 atexit_fndecl
= build_library_fn_ptr (name
, fn_type
);
5046 mark_used (atexit_fndecl
);
5047 pop_lang_context ();
5048 atexit_node
= decay_conversion (atexit_fndecl
);
5053 /* Returns the __dso_handle VAR_DECL. */
5056 get_dso_handle_node (void)
5058 if (dso_handle_node
)
5059 return dso_handle_node
;
5061 /* Declare the variable. */
5062 dso_handle_node
= declare_global_var (get_identifier ("__dso_handle"),
5065 return dso_handle_node
;
5068 /* Begin a new function with internal linkage whose job will be simply
5069 to destroy some particular variable. */
5071 static GTY(()) int start_cleanup_cnt
;
5074 start_cleanup_fn (void)
5081 push_to_top_level ();
5083 /* No need to mangle this. */
5084 push_lang_context (lang_name_c
);
5086 /* Build the parameter-types. */
5087 parmtypes
= void_list_node
;
5088 /* Functions passed to __cxa_atexit take an additional parameter.
5089 We'll just ignore it. After we implement the new calling
5090 convention for destructors, we can eliminate the use of
5091 additional cleanup functions entirely in the -fnew-abi case. */
5092 if (flag_use_cxa_atexit
)
5093 parmtypes
= tree_cons (NULL_TREE
, ptr_type_node
, parmtypes
);
5094 /* Build the function type itself. */
5095 fntype
= build_function_type (void_type_node
, parmtypes
);
5096 /* Build the name of the function. */
5097 sprintf (name
, "__tcf_%d", start_cleanup_cnt
++);
5098 /* Build the function declaration. */
5099 fndecl
= build_lang_decl (FUNCTION_DECL
, get_identifier (name
), fntype
);
5100 /* It's a function with internal linkage, generated by the
5102 TREE_PUBLIC (fndecl
) = 0;
5103 DECL_ARTIFICIAL (fndecl
) = 1;
5104 /* Make the function `inline' so that it is only emitted if it is
5105 actually needed. It is unlikely that it will be inlined, since
5106 it is only called via a function pointer, but we avoid unnecessary
5107 emissions this way. */
5108 DECL_INLINE (fndecl
) = 1;
5109 DECL_DECLARED_INLINE_P (fndecl
) = 1;
5110 DECL_INTERFACE_KNOWN (fndecl
) = 1;
5111 /* Build the parameter. */
5112 if (flag_use_cxa_atexit
)
5116 parmdecl
= cp_build_parm_decl (NULL_TREE
, ptr_type_node
);
5117 DECL_CONTEXT (parmdecl
) = fndecl
;
5118 TREE_USED (parmdecl
) = 1;
5119 DECL_ARGUMENTS (fndecl
) = parmdecl
;
5123 start_preparsed_function (fndecl
, NULL_TREE
, SF_PRE_PARSED
);
5125 pop_lang_context ();
5127 return current_function_decl
;
5130 /* Finish the cleanup function begun by start_cleanup_fn. */
5133 end_cleanup_fn (void)
5135 expand_or_defer_fn (finish_function (0));
5137 pop_from_top_level ();
5140 /* Generate code to handle the destruction of DECL, an object with
5141 static storage duration. */
5144 register_dtor_fn (tree decl
)
5151 if (TYPE_HAS_TRIVIAL_DESTRUCTOR (TREE_TYPE (decl
)))
5152 return void_zero_node
;
5154 /* Call build_cleanup before we enter the anonymous function so that
5155 any access checks will be done relative to the current scope,
5156 rather than the scope of the anonymous function. */
5157 build_cleanup (decl
);
5159 /* Now start the function. */
5160 cleanup
= start_cleanup_fn ();
5162 /* Now, recompute the cleanup. It may contain SAVE_EXPRs that refer
5163 to the original function, rather than the anonymous one. That
5164 will make the back-end think that nested functions are in use,
5165 which causes confusion. */
5167 push_deferring_access_checks (dk_no_check
);
5168 fcall
= build_cleanup (decl
);
5169 pop_deferring_access_checks ();
5171 /* Create the body of the anonymous function. */
5172 compound_stmt
= begin_compound_stmt (BCS_FN_BODY
);
5173 finish_expr_stmt (fcall
);
5174 finish_compound_stmt (compound_stmt
);
5177 /* Call atexit with the cleanup function. */
5178 cxx_mark_addressable (cleanup
);
5179 mark_used (cleanup
);
5180 cleanup
= build_unary_op (ADDR_EXPR
, cleanup
, 0);
5181 if (flag_use_cxa_atexit
)
5183 args
= tree_cons (NULL_TREE
,
5184 build_unary_op (ADDR_EXPR
, get_dso_handle_node (), 0),
5186 args
= tree_cons (NULL_TREE
, null_pointer_node
, args
);
5187 args
= tree_cons (NULL_TREE
, cleanup
, args
);
5190 args
= tree_cons (NULL_TREE
, cleanup
, NULL_TREE
);
5191 return build_function_call (get_atexit_node (), args
);
5194 /* DECL is a VAR_DECL with static storage duration. INIT, if present,
5195 is its initializer. Generate code to handle the construction
5196 and destruction of DECL. */
5199 expand_static_init (tree decl
, tree init
)
5201 gcc_assert (TREE_CODE (decl
) == VAR_DECL
);
5202 gcc_assert (TREE_STATIC (decl
));
5204 /* Some variables require no initialization. */
5206 && !TYPE_NEEDS_CONSTRUCTING (TREE_TYPE (decl
))
5207 && TYPE_HAS_TRIVIAL_DESTRUCTOR (TREE_TYPE (decl
)))
5210 if (DECL_FUNCTION_SCOPE_P (decl
))
5212 /* Emit code to perform this initialization but once. */
5213 tree if_stmt
= NULL_TREE
, inner_if_stmt
= NULL_TREE
;
5214 tree then_clause
= NULL_TREE
, inner_then_clause
= NULL_TREE
;
5215 tree guard
, guard_addr
, guard_addr_list
;
5216 tree acquire_fn
, release_fn
, abort_fn
;
5219 /* Emit code to perform this initialization but once. This code
5222 static <type> guard;
5223 if (!guard.first_byte) {
5224 if (__cxa_guard_acquire (&guard)) {
5227 // Do initialization.
5228 flag = true; __cxa_guard_release (&guard);
5229 // Register variable for destruction at end of program.
5231 if (!flag) __cxa_guard_abort (&guard);
5235 Note that the `flag' variable is only set to 1 *after* the
5236 initialization is complete. This ensures that an exception,
5237 thrown during the construction, will cause the variable to
5238 reinitialized when we pass through this code again, as per:
5242 If the initialization exits by throwing an exception, the
5243 initialization is not complete, so it will be tried again
5244 the next time control enters the declaration.
5246 This process should be thread-safe, too; multiple threads
5247 should not be able to initialize the variable more than
5250 /* Create the guard variable. */
5251 guard
= get_guard (decl
);
5253 /* This optimization isn't safe on targets with relaxed memory
5254 consistency. On such targets we force synchronization in
5255 __cxa_guard_acquire. */
5256 if (!targetm
.relaxed_ordering
|| !flag_threadsafe_statics
)
5258 /* Begin the conditional initialization. */
5259 if_stmt
= begin_if_stmt ();
5260 finish_if_stmt_cond (get_guard_cond (guard
), if_stmt
);
5261 then_clause
= begin_compound_stmt (BCS_NO_SCOPE
);
5264 if (flag_threadsafe_statics
)
5266 guard_addr
= build_address (guard
);
5267 guard_addr_list
= build_tree_list (NULL_TREE
, guard_addr
);
5269 acquire_fn
= get_identifier ("__cxa_guard_acquire");
5270 release_fn
= get_identifier ("__cxa_guard_release");
5271 abort_fn
= get_identifier ("__cxa_guard_abort");
5272 if (!get_global_value_if_present (acquire_fn
, &acquire_fn
))
5274 tree argtypes
= tree_cons (NULL_TREE
, TREE_TYPE (guard_addr
),
5276 tree vfntype
= build_function_type (void_type_node
, argtypes
);
5277 acquire_fn
= push_library_fn
5278 (acquire_fn
, build_function_type (integer_type_node
, argtypes
));
5279 release_fn
= push_library_fn (release_fn
, vfntype
);
5280 abort_fn
= push_library_fn (abort_fn
, vfntype
);
5284 release_fn
= identifier_global_value (release_fn
);
5285 abort_fn
= identifier_global_value (abort_fn
);
5288 inner_if_stmt
= begin_if_stmt ();
5289 finish_if_stmt_cond (build_call (acquire_fn
, guard_addr_list
),
5292 inner_then_clause
= begin_compound_stmt (BCS_NO_SCOPE
);
5293 begin
= get_target_expr (boolean_false_node
);
5294 flag
= TARGET_EXPR_SLOT (begin
);
5296 TARGET_EXPR_CLEANUP (begin
)
5297 = build (COND_EXPR
, void_type_node
, flag
,
5299 build_call (abort_fn
, guard_addr_list
));
5300 CLEANUP_EH_ONLY (begin
) = 1;
5302 /* Do the initialization itself. */
5303 init
= add_stmt_to_compound (begin
, init
);
5304 init
= add_stmt_to_compound
5305 (init
, build (MODIFY_EXPR
, void_type_node
, flag
, boolean_true_node
));
5306 init
= add_stmt_to_compound
5307 (init
, build_call (release_fn
, guard_addr_list
));
5310 init
= add_stmt_to_compound (init
, set_guard (guard
));
5312 /* Use atexit to register a function for destroying this static
5314 init
= add_stmt_to_compound (init
, register_dtor_fn (decl
));
5316 finish_expr_stmt (init
);
5318 if (flag_threadsafe_statics
)
5320 finish_compound_stmt (inner_then_clause
);
5321 finish_then_clause (inner_if_stmt
);
5322 finish_if_stmt (inner_if_stmt
);
5325 if (!targetm
.relaxed_ordering
|| !flag_threadsafe_statics
)
5327 finish_compound_stmt (then_clause
);
5328 finish_then_clause (if_stmt
);
5329 finish_if_stmt (if_stmt
);
5333 static_aggregates
= tree_cons (init
, decl
, static_aggregates
);
5337 /* Make TYPE a complete type based on INITIAL_VALUE.
5338 Return 0 if successful, 1 if INITIAL_VALUE can't be deciphered,
5339 2 if there was no information (in which case assume 0 if DO_DEFAULT). */
5342 complete_array_type (tree type
, tree initial_value
, int do_default
)
5344 tree maxindex
= NULL_TREE
;
5349 /* An array of character type can be initialized from a
5350 brace-enclosed string constant. */
5351 if (char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (type
)))
5352 && TREE_CODE (initial_value
) == CONSTRUCTOR
5353 && CONSTRUCTOR_ELTS (initial_value
)
5354 && (TREE_CODE (TREE_VALUE (CONSTRUCTOR_ELTS (initial_value
)))
5356 && TREE_CHAIN (CONSTRUCTOR_ELTS (initial_value
)) == NULL_TREE
)
5357 initial_value
= TREE_VALUE (CONSTRUCTOR_ELTS (initial_value
));
5359 /* Note MAXINDEX is really the maximum index, one less than the
5361 if (TREE_CODE (initial_value
) == STRING_CST
)
5364 = int_size_in_bytes (TREE_TYPE (TREE_TYPE (initial_value
)));
5365 maxindex
= build_int_cst (NULL_TREE
,
5366 (TREE_STRING_LENGTH (initial_value
)
5369 else if (TREE_CODE (initial_value
) == CONSTRUCTOR
)
5371 tree elts
= CONSTRUCTOR_ELTS (initial_value
);
5373 maxindex
= ssize_int (-1);
5374 for (; elts
; elts
= TREE_CHAIN (elts
))
5376 if (TREE_PURPOSE (elts
))
5377 maxindex
= TREE_PURPOSE (elts
);
5379 maxindex
= size_binop (PLUS_EXPR
, maxindex
, ssize_int (1));
5384 /* Make an error message unless that happened already. */
5385 if (initial_value
!= error_mark_node
)
5388 initial_value
= NULL_TREE
;
5390 /* Prevent further error messages. */
5391 maxindex
= build_int_cst (NULL_TREE
, 0);
5398 maxindex
= build_int_cst (NULL_TREE
, 0);
5408 domain
= build_index_type (maxindex
);
5409 TYPE_DOMAIN (type
) = domain
;
5412 itype
= TREE_TYPE (initial_value
);
5415 if (itype
&& !TYPE_DOMAIN (itype
))
5416 TYPE_DOMAIN (itype
) = domain
;
5417 /* The type of the main variant should never be used for arrays
5418 of different sizes. It should only ever be completed with the
5419 size of the array. */
5420 if (! TYPE_DOMAIN (TYPE_MAIN_VARIANT (type
)))
5421 TYPE_DOMAIN (TYPE_MAIN_VARIANT (type
)) = domain
;
5423 elt_type
= TREE_TYPE (type
);
5424 TYPE_NEEDS_CONSTRUCTING (type
)
5425 = TYPE_NEEDS_CONSTRUCTING (TYPE_MAIN_VARIANT (elt_type
));
5426 TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type
)
5427 = TYPE_HAS_NONTRIVIAL_DESTRUCTOR (TYPE_MAIN_VARIANT (elt_type
));
5430 /* Lay out the type now that we can get the real answer. */
5437 /* Return zero if something is declared to be a member of type
5438 CTYPE when in the context of CUR_TYPE. STRING is the error
5439 message to print in that case. Otherwise, quietly return 1. */
5442 member_function_or_else (tree ctype
, tree cur_type
, enum overload_flags flags
)
5444 if (ctype
&& ctype
!= cur_type
)
5446 if (flags
== DTOR_FLAG
)
5447 error ("destructor for alien class %qT cannot be a member", ctype
);
5449 error ("constructor for alien class %qT cannot be a member", ctype
);
5455 /* Subroutine of `grokdeclarator'. */
5457 /* Generate errors possibly applicable for a given set of specifiers.
5458 This is for ARM $7.1.2. */
5461 bad_specifiers (tree object
,
5470 error ("%qD declared as a %<virtual%> %s", object
, type
);
5472 error ("%qD declared as an %<inline%> %s", object
, type
);
5474 error ("%<const%> and %<volatile%> function specifiers on "
5475 "%qD invalid in %s declaration",
5478 cp_error_at ("%qD declared as a friend", object
);
5480 && (TREE_CODE (object
) == TYPE_DECL
5481 || (!TYPE_PTRFN_P (TREE_TYPE (object
))
5482 && !TYPE_REFFN_P (TREE_TYPE (object
))
5483 && !TYPE_PTRMEMFUNC_P (TREE_TYPE (object
)))))
5484 cp_error_at ("%qD declared with an exception specification", object
);
5487 /* CTYPE is class type, or null if non-class.
5488 TYPE is type this FUNCTION_DECL should have, either FUNCTION_TYPE
5490 DECLARATOR is the function's name.
5491 PARMS is a chain of PARM_DECLs for the function.
5492 VIRTUALP is truthvalue of whether the function is virtual or not.
5493 FLAGS are to be passed through to `grokclassfn'.
5494 QUALS are qualifiers indicating whether the function is `const'
5496 RAISES is a list of exceptions that this function can raise.
5497 CHECK is 1 if we must find this method in CTYPE, 0 if we should
5498 not look, and -1 if we should not call `grokclassfn' at all.
5500 SFK is the kind of special function (if any) for the new function.
5502 Returns `NULL_TREE' if something goes wrong, after issuing
5503 applicable error messages. */
5506 grokfndecl (tree ctype
,
5510 tree orig_declarator
,
5512 enum overload_flags flags
,
5519 special_function_kind sfk
,
5526 int staticp
= ctype
&& TREE_CODE (type
) == FUNCTION_TYPE
;
5527 int has_default_arg
= 0;
5531 type
= build_exception_variant (type
, raises
);
5533 decl
= build_lang_decl (FUNCTION_DECL
, declarator
, type
);
5534 DECL_ARGUMENTS (decl
) = parms
;
5535 /* Propagate volatile out from type to decl. */
5536 if (TYPE_VOLATILE (type
))
5537 TREE_THIS_VOLATILE (decl
) = 1;
5539 /* If this decl has namespace scope, set that up. */
5541 set_decl_namespace (decl
, in_namespace
, friendp
);
5543 DECL_CONTEXT (decl
) = FROB_CONTEXT (current_namespace
);
5545 /* `main' and builtins have implicit 'C' linkage. */
5546 if ((MAIN_NAME_P (declarator
)
5547 || (IDENTIFIER_LENGTH (declarator
) > 10
5548 && IDENTIFIER_POINTER (declarator
)[0] == '_'
5549 && IDENTIFIER_POINTER (declarator
)[1] == '_'
5550 && strncmp (IDENTIFIER_POINTER (declarator
)+2, "builtin_", 8) == 0))
5551 && current_lang_name
== lang_name_cplusplus
5552 && ctype
== NULL_TREE
5553 /* NULL_TREE means global namespace. */
5554 && DECL_CONTEXT (decl
) == NULL_TREE
)
5555 SET_DECL_LANGUAGE (decl
, lang_c
);
5557 /* Should probably propagate const out from type to decl I bet (mrs). */
5560 DECL_STATIC_FUNCTION_P (decl
) = 1;
5561 DECL_CONTEXT (decl
) = ctype
;
5565 DECL_CONTEXT (decl
) = ctype
;
5567 if (ctype
== NULL_TREE
&& DECL_MAIN_P (decl
))
5569 if (processing_template_decl
)
5570 error ("cannot declare %<::main%> to be a template");
5572 error ("cannot declare %<::main%> to be inline");
5574 error ("cannot declare %<::main%> to be static");
5575 if (!same_type_p (TREE_TYPE (TREE_TYPE (decl
)),
5578 error ("%<::main%> must return %<int%>");
5579 TREE_TYPE (TREE_TYPE (decl
)) = integer_type_node
;
5585 /* Members of anonymous types and local classes have no linkage; make
5586 them internal. If a typedef is made later, this will be changed. */
5587 if (ctype
&& (TYPE_ANONYMOUS_P (ctype
)
5588 || decl_function_context (TYPE_MAIN_DECL (ctype
))))
5593 /* [basic.link]: A name with no linkage (notably, the name of a class
5594 or enumeration declared in a local scope) shall not be used to
5595 declare an entity with linkage.
5597 Only check this for public decls for now. See core 319, 389. */
5598 t
= no_linkage_check (TREE_TYPE (decl
),
5599 /*relaxed_p=*/false);
5602 if (TYPE_ANONYMOUS_P (t
))
5604 if (DECL_EXTERN_C_P (decl
))
5605 /* Allow this; it's pretty common in C. */;
5608 pedwarn ("non-local function %q#D uses anonymous type",
5610 if (DECL_ORIGINAL_TYPE (TYPE_NAME (t
)))
5611 cp_pedwarn_at ("%q#D does not refer to the unqualified "
5612 "type, so it is not used for linkage",
5617 pedwarn ("non-local function %q#D uses local type %qT", decl
, t
);
5621 TREE_PUBLIC (decl
) = publicp
;
5624 DECL_INTERFACE_KNOWN (decl
) = 1;
5625 DECL_NOT_REALLY_EXTERN (decl
) = 1;
5628 /* If the declaration was declared inline, mark it as such. */
5630 DECL_DECLARED_INLINE_P (decl
) = 1;
5631 /* We inline functions that are explicitly declared inline, or, when
5632 the user explicitly asks us to, all functions. */
5633 if (DECL_DECLARED_INLINE_P (decl
)
5634 || (flag_inline_trees
== 2 && !DECL_INLINE (decl
) && funcdef_flag
))
5635 DECL_INLINE (decl
) = 1;
5637 DECL_EXTERNAL (decl
) = 1;
5638 if (quals
&& TREE_CODE (type
) == FUNCTION_TYPE
)
5640 error ("%smember function %qD cannot have cv-qualifier",
5641 (ctype
? "static " : "non-"), decl
);
5642 quals
= TYPE_UNQUALIFIED
;
5645 if (IDENTIFIER_OPNAME_P (DECL_NAME (decl
)))
5646 grok_op_properties (decl
, friendp
, /*complain=*/true);
5648 if (ctype
&& decl_function_context (decl
))
5649 DECL_NO_STATIC_CHAIN (decl
) = 1;
5651 for (t
= TYPE_ARG_TYPES (TREE_TYPE (decl
)); t
; t
= TREE_CHAIN (t
))
5652 if (TREE_PURPOSE (t
)
5653 && TREE_CODE (TREE_PURPOSE (t
)) == DEFAULT_ARG
)
5655 has_default_arg
= 1;
5660 && TREE_CODE (orig_declarator
) == TEMPLATE_ID_EXPR
)
5664 ("defining explicit specialization %qD in friend declaration",
5668 tree fns
= TREE_OPERAND (orig_declarator
, 0);
5669 tree args
= TREE_OPERAND (orig_declarator
, 1);
5671 if (PROCESSING_REAL_TEMPLATE_DECL_P ())
5673 /* Something like `template <class T> friend void f<T>()'. */
5674 error ("invalid use of template-id %qD in declaration "
5675 "of primary template",
5681 /* A friend declaration of the form friend void f<>(). Record
5682 the information in the TEMPLATE_ID_EXPR. */
5683 SET_DECL_IMPLICIT_INSTANTIATION (decl
);
5685 if (TREE_CODE (fns
) == COMPONENT_REF
)
5687 /* Due to bison parser ickiness, we will have already looked
5688 up an operator_name or PFUNCNAME within the current class
5689 (see template_id in parse.y). If the current class contains
5690 such a name, we'll get a COMPONENT_REF here. Undo that. */
5692 gcc_assert (TREE_TYPE (TREE_OPERAND (fns
, 0))
5693 == current_class_type
);
5694 fns
= TREE_OPERAND (fns
, 1);
5696 gcc_assert (TREE_CODE (fns
) == IDENTIFIER_NODE
5697 || TREE_CODE (fns
) == OVERLOAD
);
5698 DECL_TEMPLATE_INFO (decl
) = tree_cons (fns
, args
, NULL_TREE
);
5700 if (has_default_arg
)
5702 error ("default arguments are not allowed in declaration "
5703 "of friend template specialization %qD",
5710 error ("%<inline%> is not allowed in declaration of friend "
5711 "template specialization %qD",
5719 /* Make the init_value nonzero so pushdecl knows this is not
5720 tentative. error_mark_node is replaced later with the BLOCK. */
5721 DECL_INITIAL (decl
) = error_mark_node
;
5723 if (TYPE_NOTHROW_P (type
) || nothrow_libfn_p (decl
))
5724 TREE_NOTHROW (decl
) = 1;
5726 /* Caller will do the rest of this. */
5730 if (ctype
!= NULL_TREE
)
5732 if (sfk
== sfk_constructor
)
5733 DECL_CONSTRUCTOR_P (decl
) = 1;
5735 grokclassfn (ctype
, decl
, flags
, quals
);
5738 decl
= check_explicit_specialization (orig_declarator
, decl
,
5740 2 * (funcdef_flag
!= 0) +
5741 4 * (friendp
!= 0));
5742 if (decl
== error_mark_node
)
5747 cplus_decl_attributes (&decl
, *attrlist
, 0);
5748 *attrlist
= NULL_TREE
;
5751 if (ctype
!= NULL_TREE
5752 && (! TYPE_FOR_JAVA (ctype
) || check_java_method (decl
))
5757 old_decl
= check_classfn (ctype
, decl
,
5758 (processing_template_decl
5759 > template_class_depth (ctype
))
5760 ? current_template_parms
5763 if (old_decl
&& TREE_CODE (old_decl
) == TEMPLATE_DECL
)
5764 /* Because grokfndecl is always supposed to return a
5765 FUNCTION_DECL, we pull out the DECL_TEMPLATE_RESULT
5766 here. We depend on our callers to figure out that its
5767 really a template that's being returned. */
5768 old_decl
= DECL_TEMPLATE_RESULT (old_decl
);
5770 if (old_decl
&& DECL_STATIC_FUNCTION_P (old_decl
)
5771 && TREE_CODE (TREE_TYPE (decl
)) == METHOD_TYPE
)
5772 /* Remove the `this' parm added by grokclassfn.
5773 XXX Isn't this done in start_function, too? */
5774 revert_static_member_fn (decl
);
5775 if (old_decl
&& DECL_ARTIFICIAL (old_decl
))
5776 error ("definition of implicitly-declared %qD", old_decl
);
5783 /* Since we've smashed OLD_DECL to its
5784 DECL_TEMPLATE_RESULT, we must do the same to DECL. */
5785 if (TREE_CODE (decl
) == TEMPLATE_DECL
)
5786 decl
= DECL_TEMPLATE_RESULT (decl
);
5788 /* Attempt to merge the declarations. This can fail, in
5789 the case of some invalid specialization declarations. */
5790 pushed_scope
= push_scope (ctype
);
5791 ok
= duplicate_decls (decl
, old_decl
);
5793 pop_scope (pushed_scope
);
5796 error ("no %q#D member function declared in class %qT",
5804 if (DECL_CONSTRUCTOR_P (decl
) && !grok_ctor_properties (ctype
, decl
))
5807 if (ctype
== NULL_TREE
|| check
)
5811 DECL_VIRTUAL_P (decl
) = 1;
5816 /* DECL is a VAR_DECL for a static data member. Set flags to reflect
5817 the linkage that DECL will receive in the object file. */
5820 set_linkage_for_static_data_member (tree decl
)
5822 /* A static data member always has static storage duration and
5823 external linkage. Note that static data members are forbidden in
5824 local classes -- the only situation in which a class has
5825 non-external linkage. */
5826 TREE_PUBLIC (decl
) = 1;
5827 TREE_STATIC (decl
) = 1;
5828 /* For non-template classes, static data members are always put
5829 out in exactly those files where they are defined, just as
5830 with ordinary namespace-scope variables. */
5831 if (!processing_template_decl
)
5832 DECL_INTERFACE_KNOWN (decl
) = 1;
5835 /* Create a VAR_DECL named NAME with the indicated TYPE.
5837 If SCOPE is non-NULL, it is the class type or namespace containing
5838 the variable. If SCOPE is NULL, the variable should is created in
5839 the innermost enclosings scope. */
5842 grokvardecl (tree type
,
5844 const cp_decl_specifier_seq
*declspecs
,
5850 tree explicit_scope
;
5852 gcc_assert (!name
|| TREE_CODE (name
) == IDENTIFIER_NODE
);
5854 /* Compute the scope in which to place the variable, but remember
5855 whether or not that scope was explicitly specified by the user. */
5856 explicit_scope
= scope
;
5859 /* An explicit "extern" specifier indicates a namespace-scope
5861 if (declspecs
->storage_class
== sc_extern
)
5862 scope
= current_namespace
;
5863 else if (!at_function_scope_p ())
5864 scope
= current_scope ();
5868 && (/* If the variable is a namespace-scope variable declared in a
5869 template, we need DECL_LANG_SPECIFIC. */
5870 (TREE_CODE (scope
) == NAMESPACE_DECL
&& processing_template_decl
)
5871 /* Similarly for namespace-scope variables with language linkage
5873 || (TREE_CODE (scope
) == NAMESPACE_DECL
5874 && current_lang_name
!= lang_name_cplusplus
)
5875 /* Similarly for static data members. */
5877 decl
= build_lang_decl (VAR_DECL
, name
, type
);
5879 decl
= build_decl (VAR_DECL
, name
, type
);
5881 if (explicit_scope
&& TREE_CODE (explicit_scope
) == NAMESPACE_DECL
)
5882 set_decl_namespace (decl
, explicit_scope
, 0);
5884 DECL_CONTEXT (decl
) = scope
;
5886 if (declspecs
->storage_class
== sc_extern
)
5888 DECL_THIS_EXTERN (decl
) = 1;
5889 DECL_EXTERNAL (decl
) = !initialized
;
5892 if (DECL_CLASS_SCOPE_P (decl
))
5894 set_linkage_for_static_data_member (decl
);
5895 /* This function is only called with out-of-class definitions. */
5896 DECL_EXTERNAL (decl
) = 0;
5898 /* At top level, either `static' or no s.c. makes a definition
5899 (perhaps tentative), and absence of `static' makes it public. */
5900 else if (toplevel_bindings_p ())
5902 TREE_PUBLIC (decl
) = (declspecs
->storage_class
!= sc_static
5903 && (DECL_THIS_EXTERN (decl
) || ! constp
));
5904 TREE_STATIC (decl
) = ! DECL_EXTERNAL (decl
);
5906 /* Not at top level, only `static' makes a static definition. */
5909 TREE_STATIC (decl
) = declspecs
->storage_class
== sc_static
;
5910 TREE_PUBLIC (decl
) = DECL_EXTERNAL (decl
);
5913 if (declspecs
->specs
[(int)ds_thread
])
5915 if (targetm
.have_tls
)
5916 DECL_THREAD_LOCAL (decl
) = 1;
5918 /* A mere warning is sure to result in improper semantics
5919 at runtime. Don't bother to allow this to compile. */
5920 error ("thread-local storage not supported for this target");
5923 if (TREE_PUBLIC (decl
))
5925 /* [basic.link]: A name with no linkage (notably, the name of a class
5926 or enumeration declared in a local scope) shall not be used to
5927 declare an entity with linkage.
5929 Only check this for public decls for now. */
5930 tree t
= no_linkage_check (TREE_TYPE (decl
), /*relaxed_p=*/false);
5933 if (TYPE_ANONYMOUS_P (t
))
5935 if (DECL_EXTERN_C_P (decl
))
5936 /* Allow this; it's pretty common in C. */
5940 /* DRs 132, 319 and 389 seem to indicate types with
5941 no linkage can only be used to declare extern "C"
5942 entities. Since it's not always an error in the
5943 ISO C++ 90 Standard, we only issue a warning. */
5944 warning ("non-local variable %q#D uses anonymous type",
5946 if (DECL_ORIGINAL_TYPE (TYPE_NAME (t
)))
5947 cp_warning_at ("%q#D does not refer to the unqualified "
5948 "type, so it is not used for linkage",
5953 warning ("non-local variable %q#D uses local type %qT", decl
, t
);
5957 DECL_INTERFACE_KNOWN (decl
) = 1;
5962 /* Create and return a canonical pointer to member function type, for
5963 TYPE, which is a POINTER_TYPE to a METHOD_TYPE. */
5966 build_ptrmemfunc_type (tree type
)
5970 tree unqualified_variant
= NULL_TREE
;
5972 if (type
== error_mark_node
)
5975 /* If a canonical type already exists for this type, use it. We use
5976 this method instead of type_hash_canon, because it only does a
5977 simple equality check on the list of field members. */
5979 if ((t
= TYPE_GET_PTRMEMFUNC_TYPE (type
)))
5982 /* Make sure that we always have the unqualified pointer-to-member
5984 if (cp_type_quals (type
) != TYPE_UNQUALIFIED
)
5986 = build_ptrmemfunc_type (TYPE_MAIN_VARIANT (type
));
5988 t
= make_aggr_type (RECORD_TYPE
);
5989 xref_basetypes (t
, NULL_TREE
);
5991 /* Let the front-end know this is a pointer to member function... */
5992 TYPE_PTRMEMFUNC_FLAG (t
) = 1;
5993 /* ... and not really an aggregate. */
5994 SET_IS_AGGR_TYPE (t
, 0);
5996 field
= build_decl (FIELD_DECL
, pfn_identifier
, type
);
5999 field
= build_decl (FIELD_DECL
, delta_identifier
, delta_type_node
);
6000 TREE_CHAIN (field
) = fields
;
6003 finish_builtin_struct (t
, "__ptrmemfunc_type", fields
, ptr_type_node
);
6005 /* Zap out the name so that the back-end will give us the debugging
6006 information for this anonymous RECORD_TYPE. */
6007 TYPE_NAME (t
) = NULL_TREE
;
6009 /* If this is not the unqualified form of this pointer-to-member
6010 type, set the TYPE_MAIN_VARIANT for this type to be the
6011 unqualified type. Since they are actually RECORD_TYPEs that are
6012 not variants of each other, we must do this manually. */
6013 if (cp_type_quals (type
) != TYPE_UNQUALIFIED
)
6015 t
= build_qualified_type (t
, cp_type_quals (type
));
6016 TYPE_MAIN_VARIANT (t
) = unqualified_variant
;
6017 TYPE_NEXT_VARIANT (t
) = TYPE_NEXT_VARIANT (unqualified_variant
);
6018 TYPE_NEXT_VARIANT (unqualified_variant
) = t
;
6021 /* Cache this pointer-to-member type so that we can find it again
6023 TYPE_SET_PTRMEMFUNC_TYPE (type
, t
);
6028 /* Create and return a pointer to data member type. */
6031 build_ptrmem_type (tree class_type
, tree member_type
)
6033 if (TREE_CODE (member_type
) == METHOD_TYPE
)
6037 arg_types
= TYPE_ARG_TYPES (member_type
);
6038 class_type
= (cp_build_qualified_type
6040 cp_type_quals (TREE_TYPE (TREE_VALUE (arg_types
)))));
6042 = build_method_type_directly (class_type
,
6043 TREE_TYPE (member_type
),
6044 TREE_CHAIN (arg_types
));
6045 return build_ptrmemfunc_type (build_pointer_type (member_type
));
6049 gcc_assert (TREE_CODE (member_type
) != FUNCTION_TYPE
);
6050 return build_offset_type (class_type
, member_type
);
6054 /* DECL is a VAR_DECL defined in-class, whose TYPE is also given.
6055 Check to see that the definition is valid. Issue appropriate error
6056 messages. Return 1 if the definition is particularly bad, or 0
6060 check_static_variable_definition (tree decl
, tree type
)
6062 /* Motion 10 at San Diego: If a static const integral data member is
6063 initialized with an integral constant expression, the initializer
6064 may appear either in the declaration (within the class), or in
6065 the definition, but not both. If it appears in the class, the
6066 member is a member constant. The file-scope definition is always
6068 if (!ARITHMETIC_TYPE_P (type
) && TREE_CODE (type
) != ENUMERAL_TYPE
)
6070 error ("invalid in-class initialization of static data member "
6071 "of non-integral type %qT",
6073 /* If we just return the declaration, crashes will sometimes
6074 occur. We therefore return void_type_node, as if this were a
6075 friend declaration, to cause callers to completely ignore
6076 this declaration. */
6079 else if (!CP_TYPE_CONST_P (type
))
6080 error ("ISO C++ forbids in-class initialization of non-const "
6081 "static member %qD",
6083 else if (pedantic
&& !INTEGRAL_TYPE_P (type
))
6084 pedwarn ("ISO C++ forbids initialization of member constant "
6085 "%qD of non-integral type %qT", decl
, type
);
6090 /* Given the SIZE (i.e., number of elements) in an array, compute an
6091 appropriate index type for the array. If non-NULL, NAME is the
6092 name of the thing being declared. */
6095 compute_array_index_type (tree name
, tree size
)
6097 tree type
= TREE_TYPE (size
);
6100 /* The array bound must be an integer type. */
6101 if (!dependent_type_p (type
) && !INTEGRAL_TYPE_P (type
))
6104 error ("size of array %qD has non-integral type %qT", name
, type
);
6106 error ("size of array has non-integral type %qT", type
);
6107 size
= integer_one_node
;
6108 type
= TREE_TYPE (size
);
6111 if (abi_version_at_least (2)
6112 /* We should only handle value dependent expressions specially. */
6113 ? value_dependent_expression_p (size
)
6114 /* But for abi-1, we handled all instances in templates. This
6115 effects the manglings produced. */
6116 : processing_template_decl
)
6117 return build_index_type (build_min (MINUS_EXPR
, sizetype
,
6118 size
, integer_one_node
));
6120 /* The size might be the result of a cast. */
6121 STRIP_TYPE_NOPS (size
);
6123 /* It might be a const variable or enumeration constant. */
6124 size
= integral_constant_value (size
);
6126 /* Normally, the array-bound will be a constant. */
6127 if (TREE_CODE (size
) == INTEGER_CST
)
6129 /* Check to see if the array bound overflowed. Make that an
6130 error, no matter how generous we're being. */
6131 int old_flag_pedantic_errors
= flag_pedantic_errors
;
6132 int old_pedantic
= pedantic
;
6133 pedantic
= flag_pedantic_errors
= 1;
6134 constant_expression_warning (size
);
6135 pedantic
= old_pedantic
;
6136 flag_pedantic_errors
= old_flag_pedantic_errors
;
6138 /* An array must have a positive number of elements. */
6139 if (INT_CST_LT (size
, integer_zero_node
))
6142 error ("size of array %qD is negative", name
);
6144 error ("size of array is negative");
6145 size
= integer_one_node
;
6147 /* As an extension we allow zero-sized arrays. We always allow
6148 them in system headers because glibc uses them. */
6149 else if (integer_zerop (size
) && pedantic
&& !in_system_header
)
6152 pedwarn ("ISO C++ forbids zero-size array %qD", name
);
6154 pedwarn ("ISO C++ forbids zero-size array");
6157 else if (TREE_CONSTANT (size
))
6159 /* `(int) &fn' is not a valid array bound. */
6161 error ("size of array %qD is not an integral constant-expression",
6164 error ("size of array is not an integral constant-expression");
6169 pedwarn ("ISO C++ forbids variable-size array %qD", name
);
6171 pedwarn ("ISO C++ forbids variable-size array");
6174 if (processing_template_decl
&& !TREE_CONSTANT (size
))
6175 /* A variable sized array. */
6176 itype
= build_min (MINUS_EXPR
, sizetype
, size
, integer_one_node
);
6179 HOST_WIDE_INT saved_processing_template_decl
;
6181 /* Compute the index of the largest element in the array. It is
6182 one less than the number of elements in the array. We save
6183 and restore PROCESSING_TEMPLATE_DECL so that computations in
6184 cp_build_binary_op will be appropriately folded. */
6185 saved_processing_template_decl
= processing_template_decl
;
6186 processing_template_decl
= 0;
6187 itype
= cp_build_binary_op (MINUS_EXPR
,
6188 cp_convert (ssizetype
, size
),
6189 cp_convert (ssizetype
, integer_one_node
));
6190 itype
= fold (itype
);
6191 processing_template_decl
= saved_processing_template_decl
;
6193 if (!TREE_CONSTANT (itype
))
6194 /* A variable sized array. */
6195 itype
= variable_size (itype
);
6196 /* Make sure that there was no overflow when creating to a signed
6197 index type. (For example, on a 32-bit machine, an array with
6198 size 2^32 - 1 is too big.) */
6199 else if (TREE_OVERFLOW (itype
))
6201 error ("overflow in array dimension");
6202 TREE_OVERFLOW (itype
) = 0;
6206 /* Create and return the appropriate index type. */
6207 return build_index_type (itype
);
6210 /* Returns the scope (if any) in which the entity declared by
6211 DECLARATOR will be located. If the entity was declared with an
6212 unqualified name, NULL_TREE is returned. */
6215 get_scope_of_declarator (const cp_declarator
*declarator
)
6217 while (declarator
&& declarator
->kind
!= cdk_id
)
6218 declarator
= declarator
->declarator
;
6220 /* If the declarator-id is a SCOPE_REF, the scope in which the
6221 declaration occurs is the first operand. */
6223 && declarator
->u
.id
.qualifying_scope
)
6224 return declarator
->u
.id
.qualifying_scope
;
6226 /* Otherwise, the declarator is not a qualified name; the entity will
6227 be declared in the current scope. */
6231 /* Returns an ARRAY_TYPE for an array with SIZE elements of the
6232 indicated TYPE. If non-NULL, NAME is the NAME of the declaration
6236 create_array_type_for_decl (tree name
, tree type
, tree size
)
6238 tree itype
= NULL_TREE
;
6239 const char* error_msg
;
6241 /* If things have already gone awry, bail now. */
6242 if (type
== error_mark_node
|| size
== error_mark_node
)
6243 return error_mark_node
;
6245 /* Assume that everything will go OK. */
6248 /* There are some types which cannot be array elements. */
6249 switch (TREE_CODE (type
))
6252 error_msg
= "array of void";
6256 error_msg
= "array of functions";
6259 case REFERENCE_TYPE
:
6260 error_msg
= "array of references";
6264 error_msg
= "array of function members";
6271 /* If something went wrong, issue an error-message and return. */
6275 error ("declaration of %qD as %s", name
, error_msg
);
6277 error ("creating %s", error_msg
);
6279 return error_mark_node
;
6284 The constant expressions that specify the bounds of the arrays
6285 can be omitted only for the first member of the sequence. */
6286 if (TREE_CODE (type
) == ARRAY_TYPE
&& !TYPE_DOMAIN (type
))
6289 error ("declaration of %qD as multidimensional array must "
6290 "have bounds for all dimensions except the first",
6293 error ("multidimensional array must have bounds for all "
6294 "dimensions except the first");
6296 return error_mark_node
;
6299 /* Figure out the index type for the array. */
6301 itype
= compute_array_index_type (name
, size
);
6304 T is called the array element type; this type shall not be [...] an
6305 abstract class type. */
6306 abstract_virtuals_error (name
, type
);
6308 return build_cplus_array_type (type
, itype
);
6311 /* Check that it's OK to declare a function with the indicated TYPE.
6312 SFK indicates the kind of special function (if any) that this
6313 function is. OPTYPE is the type given in a conversion operator
6314 declaration, or the class type for a constructor/destructor.
6315 Returns the actual return type of the function; that
6316 may be different than TYPE if an error occurs, or for certain
6317 special functions. */
6320 check_special_function_return_type (special_function_kind sfk
,
6326 case sfk_constructor
:
6328 error ("return type specification for constructor invalid");
6330 if (targetm
.cxx
.cdtor_returns_this () && !TYPE_FOR_JAVA (optype
))
6331 type
= build_pointer_type (optype
);
6333 type
= void_type_node
;
6336 case sfk_destructor
:
6338 error ("return type specification for destructor invalid");
6339 /* We can't use the proper return type here because we run into
6340 problems with ambiguous bases and covariant returns.
6341 Java classes are left unchanged because (void *) isn't a valid
6342 Java type, and we don't want to change the Java ABI. */
6343 if (targetm
.cxx
.cdtor_returns_this () && !TYPE_FOR_JAVA (optype
))
6344 type
= build_pointer_type (void_type_node
);
6346 type
= void_type_node
;
6349 case sfk_conversion
:
6350 if (type
&& !same_type_p (type
, optype
))
6351 error ("operator %qT declared to return %qT", optype
, type
);
6353 pedwarn ("return type specified for %<operator %T%>", optype
);
6364 /* A variable or data member (whose unqualified name is IDENTIFIER)
6365 has been declared with the indicated TYPE. If the TYPE is not
6366 acceptable, issue an error message and return a type to use for
6367 error-recovery purposes. */
6370 check_var_type (tree identifier
, tree type
)
6372 if (VOID_TYPE_P (type
))
6375 error ("unnamed variable or field declared void");
6376 else if (TREE_CODE (identifier
) == IDENTIFIER_NODE
)
6378 gcc_assert (!IDENTIFIER_OPNAME_P (identifier
));
6379 error ("variable or field %qE declared void", identifier
);
6382 error ("variable or field declared void");
6383 type
= integer_type_node
;
6389 /* Given declspecs and a declarator (abstract or otherwise), determine
6390 the name and type of the object declared and construct a DECL node
6393 DECLSPECS is a chain of tree_list nodes whose value fields
6394 are the storage classes and type specifiers.
6396 DECL_CONTEXT says which syntactic context this declaration is in:
6397 NORMAL for most contexts. Make a VAR_DECL or FUNCTION_DECL or TYPE_DECL.
6398 FUNCDEF for a function definition. Like NORMAL but a few different
6399 error messages in each case. Return value may be zero meaning
6400 this definition is too screwy to try to parse.
6401 MEMFUNCDEF for a function definition. Like FUNCDEF but prepares to
6402 handle member functions (which have FIELD context).
6403 Return value may be zero meaning this definition is too screwy to
6405 PARM for a parameter declaration (either within a function prototype
6406 or before a function body). Make a PARM_DECL, or return void_type_node.
6407 CATCHPARM for a parameter declaration before a catch clause.
6408 TYPENAME if for a typename (in a cast or sizeof).
6409 Don't make a DECL node; just return the ..._TYPE node.
6410 FIELD for a struct or union field; make a FIELD_DECL.
6411 BITFIELD for a field with specified width.
6412 INITIALIZED is 1 if the decl has an initializer.
6414 ATTRLIST is a pointer to the list of attributes, which may be NULL
6415 if there are none; *ATTRLIST may be modified if attributes from inside
6416 the declarator should be applied to the declaration.
6418 When this function is called, scoping variables (such as
6419 CURRENT_CLASS_TYPE) should reflect the scope in which the
6420 declaration occurs, not the scope in which the new declaration will
6421 be placed. For example, on:
6425 when grokdeclarator is called for `S::f', the CURRENT_CLASS_TYPE
6426 should not be `S'. */
6429 grokdeclarator (const cp_declarator
*declarator
,
6430 const cp_decl_specifier_seq
*declspecs
,
6431 enum decl_context decl_context
,
6435 tree type
= NULL_TREE
;
6438 int virtualp
, explicitp
, friendp
, inlinep
, staticp
;
6439 int explicit_int
= 0;
6440 int explicit_char
= 0;
6441 int defaulted_int
= 0;
6442 tree dependant_name
= NULL_TREE
;
6444 tree typedef_decl
= NULL_TREE
;
6445 const char *name
= NULL
;
6446 tree typedef_type
= NULL_TREE
;
6447 int funcdef_flag
= 0;
6448 cp_declarator_kind innermost_code
= cdk_error
;
6451 /* See the code below that used this. */
6452 tree decl_attr
= NULL_TREE
;
6455 /* Keep track of what sort of function is being processed
6456 so that we can warn about default return values, or explicit
6457 return values which do not match prescribed defaults. */
6458 special_function_kind sfk
= sfk_none
;
6460 tree dname
= NULL_TREE
;
6461 tree ctor_return_type
= NULL_TREE
;
6462 enum overload_flags flags
= NO_SPECIAL
;
6463 cp_cv_quals quals
= TYPE_UNQUALIFIED
;
6464 tree raises
= NULL_TREE
;
6465 int template_count
= 0;
6466 tree returned_attrs
= NULL_TREE
;
6467 tree parms
= NULL_TREE
;
6468 const cp_declarator
*id_declarator
;
6469 /* The unqualified name of the declarator; either an
6470 IDENTIFIER_NODE, BIT_NOT_EXPR, or TEMPLATE_ID_EXPR. */
6471 tree unqualified_id
;
6472 /* The class type, if any, in which this entity is located,
6473 or NULL_TREE if none. Note that this value may be different from
6474 the current class type; for example if an attempt is made to declare
6475 "A::f" inside "B", this value will be "A". */
6476 tree ctype
= current_class_type
;
6477 /* The NAMESPACE_DECL for the namespace in which this entity is
6478 located. If an unqualified name is used to declare the entity,
6479 this value will be NULL_TREE, even if the entity is located at
6481 tree in_namespace
= NULL_TREE
;
6483 cp_storage_class storage_class
;
6484 bool unsigned_p
, signed_p
, short_p
, long_p
, thread_p
;
6485 bool type_was_error_mark_node
= false;
6487 signed_p
= declspecs
->specs
[(int)ds_signed
];
6488 unsigned_p
= declspecs
->specs
[(int)ds_unsigned
];
6489 short_p
= declspecs
->specs
[(int)ds_short
];
6490 long_p
= declspecs
->specs
[(int)ds_long
];
6491 thread_p
= declspecs
->specs
[(int)ds_thread
];
6493 if (decl_context
== FUNCDEF
)
6494 funcdef_flag
= 1, decl_context
= NORMAL
;
6495 else if (decl_context
== MEMFUNCDEF
)
6496 funcdef_flag
= -1, decl_context
= FIELD
;
6497 else if (decl_context
== BITFIELD
)
6498 bitfield
= 1, decl_context
= FIELD
;
6500 /* Look inside a declarator for the name being declared
6501 and get it as a string, for an error message. */
6502 for (id_declarator
= declarator
;
6504 id_declarator
= id_declarator
->declarator
)
6506 if (id_declarator
->kind
!= cdk_id
)
6507 innermost_code
= id_declarator
->kind
;
6509 switch (id_declarator
->kind
)
6512 if (id_declarator
->declarator
6513 && id_declarator
->declarator
->kind
== cdk_id
)
6515 sfk
= id_declarator
->declarator
->u
.id
.sfk
;
6516 if (sfk
== sfk_destructor
)
6523 tree qualifying_scope
= id_declarator
->u
.id
.qualifying_scope
;
6524 tree decl
= id_declarator
->u
.id
.unqualified_name
;
6527 if (qualifying_scope
)
6529 if (TYPE_P (qualifying_scope
))
6531 ctype
= qualifying_scope
;
6532 if (innermost_code
!= cdk_function
6533 && current_class_type
6534 && !UNIQUELY_DERIVED_FROM_P (ctype
,
6535 current_class_type
))
6537 error ("type %qT is not derived from type %qT",
6538 ctype
, current_class_type
);
6539 return error_mark_node
;
6542 else if (TREE_CODE (qualifying_scope
) == NAMESPACE_DECL
)
6543 in_namespace
= qualifying_scope
;
6545 if (TREE_CODE (decl
) == BASELINK
)
6546 decl
= BASELINK_FUNCTIONS (decl
);
6547 if (decl
== error_mark_node
)
6548 return error_mark_node
;
6549 switch (TREE_CODE (decl
))
6555 if (innermost_code
!= cdk_function
)
6557 error ("declaration of %qD as non-function", decl
);
6558 return error_mark_node
;
6560 else if (!qualifying_scope
6561 && !(current_class_type
&& at_class_scope_p ()))
6563 error ("declaration of %qD as non-member", decl
);
6564 return error_mark_node
;
6567 type
= TREE_OPERAND (decl
, 0);
6568 name
= IDENTIFIER_POINTER (constructor_name (type
));
6572 case TEMPLATE_ID_EXPR
:
6574 tree fns
= TREE_OPERAND (decl
, 0);
6577 if (TREE_CODE (dname
) == COMPONENT_REF
)
6578 dname
= TREE_OPERAND (dname
, 1);
6579 if (TREE_CODE (dname
) != IDENTIFIER_NODE
)
6581 gcc_assert (is_overloaded_fn (dname
));
6582 dname
= DECL_NAME (get_first_fn (dname
));
6587 case IDENTIFIER_NODE
:
6588 if (TREE_CODE (decl
) == IDENTIFIER_NODE
)
6591 if (C_IS_RESERVED_WORD (dname
))
6593 error ("declarator-id missing; using reserved word %qD",
6595 name
= IDENTIFIER_POINTER (dname
);
6597 else if (!IDENTIFIER_TYPENAME_P (dname
))
6598 name
= IDENTIFIER_POINTER (dname
);
6601 gcc_assert (flags
== NO_SPECIAL
);
6602 flags
= TYPENAME_FLAG
;
6603 ctor_return_type
= TREE_TYPE (dname
);
6604 sfk
= sfk_conversion
;
6605 if (is_typename_at_global_scope (dname
))
6606 name
= IDENTIFIER_POINTER (dname
);
6608 name
= "<invalid operator>";
6613 dname
= constructor_name (TREE_TYPE (decl
));
6614 name
= IDENTIFIER_POINTER (dname
);
6635 if (id_declarator
->kind
== cdk_id
)
6639 /* A function definition's declarator must have the form of
6640 a function declarator. */
6642 if (funcdef_flag
&& innermost_code
!= cdk_function
)
6645 if (((dname
&& IDENTIFIER_OPNAME_P (dname
)) || flags
== TYPENAME_FLAG
)
6646 && innermost_code
!= cdk_function
6647 && ! (ctype
&& !declspecs
->any_specifiers_p
))
6649 error ("declaration of %qD as non-function", dname
);
6650 return error_mark_node
;
6653 /* Anything declared one level down from the top level
6654 must be one of the parameters of a function
6655 (because the body is at least two levels down). */
6657 /* This heuristic cannot be applied to C++ nodes! Fixed, however,
6658 by not allowing C++ class definitions to specify their parameters
6659 with xdecls (must be spec.d in the parmlist).
6661 Since we now wait to push a class scope until we are sure that
6662 we are in a legitimate method context, we must set oldcname
6663 explicitly (since current_class_name is not yet alive).
6665 We also want to avoid calling this a PARM if it is in a namespace. */
6667 if (decl_context
== NORMAL
&& !toplevel_bindings_p ())
6669 struct cp_binding_level
*b
= current_binding_level
;
6670 current_binding_level
= b
->level_chain
;
6671 if (current_binding_level
!= 0 && toplevel_bindings_p ())
6672 decl_context
= PARM
;
6673 current_binding_level
= b
;
6677 name
= decl_context
== PARM
? "parameter" : "type name";
6679 /* If there were multiple types specified in the decl-specifier-seq,
6680 issue an error message. */
6681 if (declspecs
->multiple_types_p
)
6682 error ("two or more data types in declaration of %qs", name
);
6683 /* Extract the basic type from the decl-specifier-seq. */
6684 type
= declspecs
->type
;
6685 if (type
== error_mark_node
)
6688 type_was_error_mark_node
= true;
6690 /* If the entire declaration is itself tagged as deprecated then
6691 suppress reports of deprecated items. */
6692 if (type
&& TREE_DEPRECATED (type
)
6693 && deprecated_state
!= DEPRECATED_SUPPRESS
)
6694 warn_deprecated_use (type
);
6695 if (type
&& TREE_CODE (type
) == TYPE_DECL
)
6697 typedef_decl
= type
;
6698 type
= TREE_TYPE (typedef_decl
);
6700 /* No type at all: default to `int', and set DEFAULTED_INT
6701 because it was not a user-defined typedef. */
6702 if (type
== NULL_TREE
&& (signed_p
|| unsigned_p
|| long_p
|| short_p
))
6704 /* These imply 'int'. */
6705 type
= integer_type_node
;
6709 explicit_int
= declspecs
->explicit_int_p
;
6710 explicit_char
= declspecs
->explicit_char_p
;
6712 /* Check for repeated decl-specifiers. */
6713 for (ds
= ds_first
; ds
!= ds_last
; ++ds
)
6715 unsigned count
= declspecs
->specs
[(int)ds
];
6718 /* The "long" specifier is a special case because of
6723 error ("%<long long long%> is too long for GCC");
6724 else if (pedantic
&& !in_system_header
&& warn_long_long
)
6725 pedwarn ("ISO C++ does not support %<long long%>");
6729 else if (declspecs
->specs
[(int)ds
] > 1)
6731 static const char *const decl_spec_names
[] = {
6747 error ("duplicate %qs", decl_spec_names
[(int)ds
]);
6752 /* See the code below that used this. */
6754 decl_attr
= DECL_ATTRIBUTES (typedef_decl
);
6756 typedef_type
= type
;
6759 if (sfk
!= sfk_conversion
)
6760 ctor_return_type
= ctype
;
6762 if (sfk
!= sfk_none
)
6763 type
= check_special_function_return_type (sfk
, type
,
6765 else if (type
== NULL_TREE
)
6771 /* We handle `main' specially here, because 'main () { }' is so
6772 common. With no options, it is allowed. With -Wreturn-type,
6773 it is a warning. It is only an error with -pedantic-errors. */
6774 is_main
= (funcdef_flag
6775 && dname
&& MAIN_NAME_P (dname
)
6776 && ctype
== NULL_TREE
6777 && in_namespace
== NULL_TREE
6778 && current_namespace
== global_namespace
);
6780 if (type_was_error_mark_node
)
6781 /* We've already issued an error, don't complain more. */;
6782 else if (in_system_header
|| flag_ms_extensions
)
6783 /* Allow it, sigh. */;
6784 else if (pedantic
|| ! is_main
)
6785 pedwarn ("ISO C++ forbids declaration of %qs with no type", name
);
6786 else if (warn_return_type
)
6787 warning ("ISO C++ forbids declaration of %qs with no type", name
);
6789 type
= integer_type_node
;
6794 /* Now process the modifiers that were specified
6795 and check for invalid combinations. */
6797 /* Long double is a special combination. */
6798 if (long_p
&& TYPE_MAIN_VARIANT (type
) == double_type_node
)
6801 type
= build_qualified_type (long_double_type_node
,
6802 cp_type_quals (type
));
6805 /* Check all other uses of type modifiers. */
6807 if (unsigned_p
|| signed_p
|| long_p
|| short_p
)
6811 if (TREE_CODE (type
) == REAL_TYPE
)
6812 error ("short, signed or unsigned invalid for %qs", name
);
6813 else if (TREE_CODE (type
) != INTEGER_TYPE
)
6814 error ("long, short, signed or unsigned invalid for %qs", name
);
6815 else if (long_p
&& short_p
)
6816 error ("long and short specified together for %qs", name
);
6817 else if ((long_p
|| short_p
) && explicit_char
)
6818 error ("long or short specified with char for %qs", name
);
6819 else if ((long_p
|| short_p
) && TREE_CODE (type
) == REAL_TYPE
)
6820 error ("long or short specified with floating type for %qs", name
);
6821 else if (signed_p
&& unsigned_p
)
6822 error ("signed and unsigned given together for %qs", name
);
6826 if (!explicit_int
&& !defaulted_int
&& !explicit_char
&& pedantic
)
6828 pedwarn ("long, short, signed or unsigned used invalidly for %qs",
6830 if (flag_pedantic_errors
)
6835 /* Discard the type modifiers if they are invalid. */
6846 /* Decide whether an integer type is signed or not.
6847 Optionally treat bitfields as signed by default. */
6851 It is implementation-defined whether a plain (neither
6852 explicitly signed or unsigned) char, short, int, or long
6853 bit-field is signed or unsigned.
6855 Naturally, we extend this to long long as well. Note that
6856 this does not include wchar_t. */
6857 || (bitfield
&& !flag_signed_bitfields
6859 /* A typedef for plain `int' without `signed' can be
6860 controlled just like plain `int', but a typedef for
6861 `signed int' cannot be so controlled. */
6863 && C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl
))
6864 && (TREE_CODE (type
) == INTEGER_TYPE
6865 || TREE_CODE (type
) == CHAR_TYPE
)
6866 && !same_type_p (TYPE_MAIN_VARIANT (type
), wchar_type_node
)))
6869 type
= long_long_unsigned_type_node
;
6871 type
= long_unsigned_type_node
;
6873 type
= short_unsigned_type_node
;
6874 else if (type
== char_type_node
)
6875 type
= unsigned_char_type_node
;
6876 else if (typedef_decl
)
6877 type
= c_common_unsigned_type (type
);
6879 type
= unsigned_type_node
;
6881 else if (signed_p
&& type
== char_type_node
)
6882 type
= signed_char_type_node
;
6884 type
= long_long_integer_type_node
;
6886 type
= long_integer_type_node
;
6888 type
= short_integer_type_node
;
6890 if (declspecs
->specs
[(int)ds_complex
])
6892 if (TREE_CODE (type
) != INTEGER_TYPE
&& TREE_CODE (type
) != REAL_TYPE
)
6893 error ("complex invalid for %qs", name
);
6894 /* If we just have "complex", it is equivalent to
6895 "complex double", but if any modifiers at all are specified it is
6896 the complex form of TYPE. E.g, "complex short" is
6897 "complex short int". */
6899 else if (defaulted_int
&& ! longlong
6900 && ! (long_p
|| short_p
|| signed_p
|| unsigned_p
))
6901 type
= complex_double_type_node
;
6902 else if (type
== integer_type_node
)
6903 type
= complex_integer_type_node
;
6904 else if (type
== float_type_node
)
6905 type
= complex_float_type_node
;
6906 else if (type
== double_type_node
)
6907 type
= complex_double_type_node
;
6908 else if (type
== long_double_type_node
)
6909 type
= complex_long_double_type_node
;
6911 type
= build_complex_type (type
);
6914 type_quals
= TYPE_UNQUALIFIED
;
6915 if (declspecs
->specs
[(int)ds_const
])
6916 type_quals
|= TYPE_QUAL_CONST
;
6917 if (declspecs
->specs
[(int)ds_volatile
])
6918 type_quals
|= TYPE_QUAL_VOLATILE
;
6919 if (declspecs
->specs
[(int)ds_restrict
])
6920 type_quals
|= TYPE_QUAL_RESTRICT
;
6921 if (sfk
== sfk_conversion
&& type_quals
!= TYPE_UNQUALIFIED
)
6922 error ("qualifiers are not allowed on declaration of %<operator %T%>",
6925 if (TREE_CODE (type
) == FUNCTION_TYPE
6926 && type_quals
!= TYPE_UNQUALIFIED
)
6928 /* This was an error in C++98 (cv-qualifiers cannot be added to
6929 a function type), but DR 295 makes the code well-formed by
6930 dropping the extra qualifiers. */
6933 tree bad_type
= build_qualified_type (type
, type_quals
);
6934 pedwarn ("ignoring %qV qualifiers added to function type %qT",
6937 type_quals
= TYPE_UNQUALIFIED
;
6939 type_quals
|= cp_type_quals (type
);
6940 type
= cp_build_qualified_type_real
6941 (type
, type_quals
, ((typedef_decl
&& !DECL_ARTIFICIAL (typedef_decl
)
6942 ? tf_ignore_bad_quals
: 0) | tf_error
| tf_warning
));
6943 /* We might have ignored or rejected some of the qualifiers. */
6944 type_quals
= cp_type_quals (type
);
6947 inlinep
= !! declspecs
->specs
[(int)ds_inline
];
6948 virtualp
= !! declspecs
->specs
[(int)ds_virtual
];
6949 explicitp
= !! declspecs
->specs
[(int)ds_explicit
];
6951 storage_class
= declspecs
->storage_class
;
6952 if (storage_class
== sc_static
)
6953 staticp
= 1 + (decl_context
== FIELD
);
6955 if (virtualp
&& staticp
== 2)
6957 error ("member %qD cannot be declared both virtual and static", dname
);
6960 friendp
= !! declspecs
->specs
[(int)ds_friend
];
6962 if (dependant_name
&& !friendp
)
6964 error ("%<%T::%D%> is not a valid declarator", ctype
, dependant_name
);
6965 return void_type_node
;
6968 /* Issue errors about use of storage classes for parameters. */
6969 if (decl_context
== PARM
)
6971 if (declspecs
->specs
[(int)ds_typedef
])
6972 error ("typedef declaration invalid in parameter declaration");
6973 else if (storage_class
== sc_static
6974 || storage_class
== sc_extern
6976 error ("storage class specifiers invalid in parameter declarations");
6979 /* Give error if `virtual' is used outside of class declaration. */
6981 && (current_class_name
== NULL_TREE
|| decl_context
!= FIELD
))
6983 error ("virtual outside class declaration");
6987 /* Static anonymous unions are dealt with here. */
6988 if (staticp
&& decl_context
== TYPENAME
6990 && ANON_AGGR_TYPE_P (declspecs
->type
))
6991 decl_context
= FIELD
;
6993 /* Warn about storage classes that are invalid for certain
6994 kinds of declarations (parameters, typenames, etc.). */
6995 if (declspecs
->multiple_storage_classes_p
)
6996 error ("multiple storage classes in declaration of %qs", name
);
6999 && storage_class
!= sc_extern
7000 && storage_class
!= sc_static
)
7001 || declspecs
->specs
[(int)ds_typedef
]))
7003 error ("multiple storage classes in declaration of %qs", name
);
7006 else if (decl_context
!= NORMAL
7007 && ((storage_class
!= sc_none
7008 && storage_class
!= sc_mutable
)
7011 if ((decl_context
== PARM
|| decl_context
== CATCHPARM
)
7012 && (storage_class
== sc_register
7013 || storage_class
== sc_auto
))
7015 else if (declspecs
->specs
[(int)ds_typedef
])
7017 else if (decl_context
== FIELD
7018 /* C++ allows static class elements. */
7019 && storage_class
== sc_static
)
7020 /* C++ also allows inlines and signed and unsigned elements,
7021 but in those cases we don't come in here. */
7025 if (decl_context
== FIELD
)
7027 tree tmp
= NULL_TREE
;
7032 /* Avoid trying to get an operand off an identifier node. */
7033 if (declarator
->kind
!= cdk_id
)
7034 tmp
= declarator
->declarator
->u
.id
.unqualified_name
;
7036 tmp
= declarator
->u
.id
.unqualified_name
;
7037 op
= IDENTIFIER_OPNAME_P (tmp
);
7038 if (IDENTIFIER_TYPENAME_P (tmp
))
7040 if (is_typename_at_global_scope (tmp
))
7041 name
= IDENTIFIER_POINTER (tmp
);
7043 name
= "<invalid operator>";
7046 error ("storage class specified for %s %qs",
7047 op
? "member operator" : "field",
7052 if (decl_context
== PARM
|| decl_context
== CATCHPARM
)
7053 error ("storage class specified for parameter %qs", name
);
7055 error ("storage class specified for typename");
7057 if (storage_class
== sc_register
7058 || storage_class
== sc_auto
7059 || storage_class
== sc_extern
7061 storage_class
= sc_none
;
7064 else if (storage_class
== sc_extern
&& initialized
7067 if (toplevel_bindings_p ())
7069 /* It's common practice (and completely valid) to have a const
7070 be initialized and declared extern. */
7071 if (!(type_quals
& TYPE_QUAL_CONST
))
7072 warning ("%qs initialized and declared %<extern%>", name
);
7075 error ("%qs has both %<extern%> and initializer", name
);
7077 else if (storage_class
== sc_extern
&& funcdef_flag
7078 && ! toplevel_bindings_p ())
7079 error ("nested function %qs declared %<extern%>", name
);
7080 else if (toplevel_bindings_p ())
7082 if (storage_class
== sc_auto
)
7083 error ("top-level declaration of %qs specifies %<auto%>", name
);
7086 && storage_class
!= sc_extern
7087 && storage_class
!= sc_static
)
7089 error ("function-scope %qs implicitly auto and declared %<__thread%>",
7094 if (storage_class
&& friendp
)
7095 error ("storage class specifiers invalid in friend function declarations");
7098 unqualified_id
= NULL_TREE
;
7101 unqualified_id
= id_declarator
->u
.id
.unqualified_name
;
7102 if (TREE_CODE (unqualified_id
) == BASELINK
)
7103 unqualified_id
= BASELINK_FUNCTIONS (unqualified_id
);
7104 switch (TREE_CODE (unqualified_id
))
7108 = constructor_name (TREE_OPERAND (unqualified_id
, 0));
7113 = constructor_name (TREE_TYPE (unqualified_id
));
7116 case IDENTIFIER_NODE
:
7117 case TEMPLATE_ID_EXPR
:
7125 /* Determine the type of the entity declared by recurring on the
7128 declarator
&& declarator
->kind
!= cdk_id
;
7129 declarator
= declarator
->declarator
)
7131 const cp_declarator
*inner_declarator
;
7134 if (type
== error_mark_node
)
7135 return error_mark_node
;
7137 inner_declarator
= declarator
->declarator
;
7139 attrs
= declarator
->attributes
;
7145 if (declarator
== NULL
|| declarator
->kind
== cdk_id
)
7146 attr_flags
|= (int) ATTR_FLAG_DECL_NEXT
;
7147 if (declarator
->kind
== cdk_function
)
7148 attr_flags
|= (int) ATTR_FLAG_FUNCTION_NEXT
;
7149 if (declarator
->kind
== cdk_array
)
7150 attr_flags
|= (int) ATTR_FLAG_ARRAY_NEXT
;
7151 returned_attrs
= decl_attributes (&type
,
7152 chainon (returned_attrs
, attrs
),
7156 switch (declarator
->kind
)
7159 type
= create_array_type_for_decl (dname
, type
,
7160 declarator
->u
.array
.bounds
);
7168 /* Declaring a function type.
7169 Make sure we have a valid type for the function to return. */
7171 /* We now know that the TYPE_QUALS don't apply to the
7172 decl, but to its return type. */
7173 type_quals
= TYPE_UNQUALIFIED
;
7175 /* Warn about some types functions can't return. */
7177 if (TREE_CODE (type
) == FUNCTION_TYPE
)
7179 error ("%qs declared as function returning a function", name
);
7180 type
= integer_type_node
;
7182 if (TREE_CODE (type
) == ARRAY_TYPE
)
7184 error ("%qs declared as function returning an array", name
);
7185 type
= integer_type_node
;
7188 /* Pick up type qualifiers which should be applied to `this'. */
7189 quals
= declarator
->u
.function
.qualifiers
;
7191 /* Pick up the exception specifications. */
7192 raises
= declarator
->u
.function
.exception_specification
;
7194 /* Say it's a definition only for the CALL_EXPR
7195 closest to the identifier. */
7196 funcdecl_p
= inner_declarator
&& inner_declarator
->kind
== cdk_id
;
7198 if (ctype
== NULL_TREE
7199 && decl_context
== FIELD
7201 && (friendp
== 0 || dname
== current_class_name
))
7202 ctype
= current_class_type
;
7204 if (ctype
&& sfk
== sfk_conversion
)
7205 TYPE_HAS_CONVERSION (ctype
) = 1;
7206 if (ctype
&& (sfk
== sfk_constructor
7207 || sfk
== sfk_destructor
))
7209 /* We are within a class's scope. If our declarator name
7210 is the same as the class name, and we are defining
7211 a function, then it is a constructor/destructor, and
7212 therefore returns a void type. */
7214 if (flags
== DTOR_FLAG
)
7216 /* ISO C++ 12.4/2. A destructor may not be
7217 declared const or volatile. A destructor may
7220 error ("destructor cannot be static member function");
7223 error ("destructors may not be cv-qualified");
7224 quals
= TYPE_UNQUALIFIED
;
7226 if (decl_context
== FIELD
)
7228 if (! member_function_or_else (ctype
,
7231 return void_type_node
;
7234 else /* It's a constructor. */
7238 /* ISO C++ 12.1. A constructor may not be
7239 declared const or volatile. A constructor may
7240 not be virtual. A constructor may not be
7243 error ("constructor cannot be static member function");
7246 pedwarn ("constructors cannot be declared virtual");
7251 error ("constructors may not be cv-qualified");
7252 quals
= TYPE_UNQUALIFIED
;
7254 if (decl_context
== FIELD
)
7256 if (! member_function_or_else (ctype
,
7259 return void_type_node
;
7260 TYPE_HAS_CONSTRUCTOR (ctype
) = 1;
7261 if (sfk
!= sfk_constructor
)
7265 if (decl_context
== FIELD
)
7271 error ("can't initialize friend function %qs", name
);
7274 /* Cannot be both friend and virtual. */
7275 error ("virtual functions cannot be friends");
7278 if (decl_context
== NORMAL
)
7279 error ("friend declaration not in class definition");
7280 if (current_function_decl
&& funcdef_flag
)
7281 error ("can't define friend function %qs in a local "
7286 arg_types
= grokparms (declarator
->u
.function
.parameters
,
7289 if (inner_declarator
7290 && inner_declarator
->kind
== cdk_id
7291 && inner_declarator
->u
.id
.sfk
== sfk_destructor
7292 && arg_types
!= void_list_node
)
7294 error ("destructors may not have parameters");
7295 arg_types
= void_list_node
;
7299 type
= build_function_type (type
, arg_types
);
7300 type
= cp_build_qualified_type (type
, quals
);
7307 /* Filter out pointers-to-references and references-to-references.
7308 We can get these if a TYPE_DECL is used. */
7310 if (TREE_CODE (type
) == REFERENCE_TYPE
)
7312 error (declarator
->kind
== cdk_reference
7313 ? "cannot declare reference to %q#T"
7314 : "cannot declare pointer to %q#T", type
);
7315 type
= TREE_TYPE (type
);
7317 else if (VOID_TYPE_P (type
))
7319 if (declarator
->kind
== cdk_reference
)
7320 error ("cannot declare reference to %q#T", type
);
7321 else if (declarator
->kind
== cdk_ptrmem
)
7322 error ("cannot declare pointer to %q#T member", type
);
7325 /* We now know that the TYPE_QUALS don't apply to the decl,
7326 but to the target of the pointer. */
7327 type_quals
= TYPE_UNQUALIFIED
;
7329 if (declarator
->kind
== cdk_ptrmem
7330 && (TREE_CODE (type
) == FUNCTION_TYPE
7331 || (quals
&& TREE_CODE (type
) == METHOD_TYPE
)))
7335 /* If the type is a FUNCTION_TYPE, pick up the
7336 qualifiers from that function type. No other
7337 qualifiers may be supplied. */
7338 if (TREE_CODE (type
) == FUNCTION_TYPE
)
7339 quals
= cp_type_quals (type
);
7341 dummy
= build_decl (TYPE_DECL
, NULL_TREE
, type
);
7342 grok_method_quals (declarator
->u
.pointer
.class_type
,
7344 type
= TREE_TYPE (dummy
);
7345 quals
= TYPE_UNQUALIFIED
;
7348 if (declarator
->kind
== cdk_reference
)
7350 if (!VOID_TYPE_P (type
))
7351 type
= build_reference_type (type
);
7353 else if (TREE_CODE (type
) == METHOD_TYPE
)
7354 type
= build_ptrmemfunc_type (build_pointer_type (type
));
7355 else if (declarator
->kind
== cdk_ptrmem
)
7357 /* We might have parsed a namespace as the class type. */
7358 if (TREE_CODE (declarator
->u
.pointer
.class_type
)
7361 error ("%qD is a namespace",
7362 declarator
->u
.pointer
.class_type
);
7363 type
= build_pointer_type (type
);
7365 else if (declarator
->u
.pointer
.class_type
== error_mark_node
)
7366 /* We will already have complained. */
7367 type
= error_mark_node
;
7369 type
= build_ptrmem_type (declarator
->u
.pointer
.class_type
,
7373 type
= build_pointer_type (type
);
7375 /* Process a list of type modifier keywords (such as
7376 const or volatile) that were given inside the `*' or `&'. */
7378 if (declarator
->u
.pointer
.qualifiers
)
7381 = cp_build_qualified_type (type
,
7382 declarator
->u
.pointer
.qualifiers
);
7383 type_quals
= cp_type_quals (type
);
7396 if (unqualified_id
&& TREE_CODE (unqualified_id
) == TEMPLATE_ID_EXPR
7397 && TREE_CODE (type
) != FUNCTION_TYPE
7398 && TREE_CODE (type
) != METHOD_TYPE
)
7400 error ("template-id %qD used as a declarator",
7402 unqualified_id
= dname
;
7405 /* If DECLARATOR is non-NULL, we know it is a cdk_id declarator;
7406 otherwise, we would not have exited the loop above. */
7408 && declarator
->u
.id
.qualifying_scope
7409 && TYPE_P (declarator
->u
.id
.qualifying_scope
))
7413 ctype
= declarator
->u
.id
.qualifying_scope
;
7414 ctype
= TYPE_MAIN_VARIANT (ctype
);
7416 while (t
!= NULL_TREE
&& CLASS_TYPE_P (t
))
7418 /* You're supposed to have one `template <...>' for every
7419 template class, but you don't need one for a full
7420 specialization. For example:
7422 template <class T> struct S{};
7423 template <> struct S<int> { void f(); };
7424 void S<int>::f () {}
7426 is correct; there shouldn't be a `template <>' for the
7427 definition of `S<int>::f'. */
7428 if (CLASSTYPE_TEMPLATE_INFO (t
)
7429 && (CLASSTYPE_TEMPLATE_INSTANTIATION (t
)
7430 || uses_template_parms (CLASSTYPE_TI_ARGS (t
)))
7431 && PRIMARY_TEMPLATE_P (CLASSTYPE_TI_TEMPLATE (t
)))
7432 template_count
+= 1;
7434 t
= TYPE_MAIN_DECL (t
);
7435 t
= DECL_CONTEXT (t
);
7438 if (ctype
== current_class_type
)
7444 Is this ill-formed? */
7447 pedwarn ("extra qualification %<%T::%> on member %qs ignored",
7450 else if (TREE_CODE (type
) == FUNCTION_TYPE
)
7452 tree sname
= declarator
->u
.id
.unqualified_name
;
7454 if (TREE_CODE (sname
) == IDENTIFIER_NODE
7455 && NEW_DELETE_OPNAME_P (sname
))
7456 /* Overloaded operator new and operator delete
7457 are always static functions. */
7459 else if (current_class_type
== NULL_TREE
|| friendp
)
7461 = build_method_type_directly (ctype
,
7463 TYPE_ARG_TYPES (type
));
7466 error ("cannot declare member function %<%T::%s%> within %<%T%>",
7467 ctype
, name
, current_class_type
);
7468 return error_mark_node
;
7471 else if (declspecs
->specs
[(int)ds_typedef
]
7472 || COMPLETE_TYPE_P (complete_type (ctype
)))
7474 /* Have to move this code elsewhere in this function.
7475 this code is used for i.e., typedef int A::M; M *pm;
7477 It is? How? jason 10/2/94 */
7479 if (current_class_type
)
7481 error ("cannot declare member %<%T::%s%> within %qT",
7482 ctype
, name
, current_class_type
);
7483 return void_type_node
;
7488 cxx_incomplete_type_error (NULL_TREE
, ctype
);
7489 return error_mark_node
;
7496 *attrlist
= chainon (returned_attrs
, *attrlist
);
7498 attrlist
= &returned_attrs
;
7501 /* Now TYPE has the actual type. */
7503 /* Did array size calculations overflow? */
7505 if (TREE_CODE (type
) == ARRAY_TYPE
7506 && COMPLETE_TYPE_P (type
)
7507 && TREE_OVERFLOW (TYPE_SIZE (type
)))
7509 error ("size of array %qs is too large", name
);
7510 /* If we proceed with the array type as it is, we'll eventually
7511 crash in tree_low_cst(). */
7512 type
= error_mark_node
;
7515 if ((decl_context
== FIELD
|| decl_context
== PARM
)
7516 && !processing_template_decl
7517 && variably_modified_type_p (type
, NULL_TREE
))
7519 if (decl_context
== FIELD
)
7520 error ("data member may not have variably modified type %qT", type
);
7522 error ("parameter may not have variably modified type %qT", type
);
7523 type
= error_mark_node
;
7526 if (explicitp
== 1 || (explicitp
&& friendp
))
7528 /* [dcl.fct.spec] The explicit specifier shall only be used in
7529 declarations of constructors within a class definition. */
7530 error ("only declarations of constructors can be %<explicit%>");
7534 if (storage_class
== sc_mutable
)
7536 if (decl_context
!= FIELD
|| friendp
)
7538 error ("non-member %qs cannot be declared %<mutable%>", name
);
7539 storage_class
= sc_none
;
7541 else if (decl_context
== TYPENAME
|| declspecs
->specs
[(int)ds_typedef
])
7543 error ("non-object member %qs cannot be declared %<mutable%>", name
);
7544 storage_class
= sc_none
;
7546 else if (TREE_CODE (type
) == FUNCTION_TYPE
7547 || TREE_CODE (type
) == METHOD_TYPE
)
7549 error ("function %qs cannot be declared %<mutable%>", name
);
7550 storage_class
= sc_none
;
7554 error ("static %qs cannot be declared %<mutable%>", name
);
7555 storage_class
= sc_none
;
7557 else if (type_quals
& TYPE_QUAL_CONST
)
7559 error ("const %qs cannot be declared %<mutable%>", name
);
7560 storage_class
= sc_none
;
7564 /* If this is declaring a typedef name, return a TYPE_DECL. */
7565 if (declspecs
->specs
[(int)ds_typedef
] && decl_context
!= TYPENAME
)
7569 /* Note that the grammar rejects storage classes
7570 in typenames, fields or parameters. */
7571 if (current_lang_name
== lang_name_java
)
7572 TYPE_FOR_JAVA (type
) = 1;
7574 if (decl_context
== FIELD
)
7575 decl
= build_lang_decl (TYPE_DECL
, unqualified_id
, type
);
7577 decl
= build_decl (TYPE_DECL
, unqualified_id
, type
);
7578 if (id_declarator
&& declarator
->u
.id
.qualifying_scope
)
7579 error ("%Jtypedef name may not be a nested-name-specifier", decl
);
7581 if (decl_context
!= FIELD
)
7583 if (!current_function_decl
)
7584 DECL_CONTEXT (decl
) = FROB_CONTEXT (current_namespace
);
7585 else if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (current_function_decl
)
7586 || (DECL_MAYBE_IN_CHARGE_DESTRUCTOR_P
7587 (current_function_decl
)))
7588 /* The TYPE_DECL is "abstract" because there will be
7589 clones of this constructor/destructor, and there will
7590 be copies of this TYPE_DECL generated in those
7592 DECL_ABSTRACT (decl
) = 1;
7594 else if (constructor_name_p (unqualified_id
, current_class_type
))
7595 pedwarn ("ISO C++ forbids nested type %qD with same name "
7596 "as enclosing class",
7599 /* If the user declares "typedef struct {...} foo" then the
7600 struct will have an anonymous name. Fill that name in now.
7601 Nothing can refer to it, so nothing needs know about the name
7603 if (type
!= error_mark_node
7606 && TREE_CODE (TYPE_NAME (type
)) == TYPE_DECL
7607 && TYPE_ANONYMOUS_P (type
)
7608 /* Don't do this if there are attributes. */
7609 && (!attrlist
|| !*attrlist
)
7610 && cp_type_quals (type
) == TYPE_UNQUALIFIED
)
7612 tree oldname
= TYPE_NAME (type
);
7615 /* Replace the anonymous name with the real name everywhere. */
7616 for (t
= TYPE_MAIN_VARIANT (type
); t
; t
= TYPE_NEXT_VARIANT (t
))
7617 if (TYPE_NAME (t
) == oldname
)
7618 TYPE_NAME (t
) = decl
;
7620 if (TYPE_LANG_SPECIFIC (type
))
7621 TYPE_WAS_ANONYMOUS (type
) = 1;
7623 /* If this is a typedef within a template class, the nested
7624 type is a (non-primary) template. The name for the
7625 template needs updating as well. */
7626 if (TYPE_LANG_SPECIFIC (type
) && CLASSTYPE_TEMPLATE_INFO (type
))
7627 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type
))
7628 = TYPE_IDENTIFIER (type
);
7630 /* FIXME remangle member functions; member functions of a
7631 type with external linkage have external linkage. */
7636 if (ctype
== NULL_TREE
)
7638 if (TREE_CODE (type
) == METHOD_TYPE
)
7639 ctype
= TYPE_METHOD_BASETYPE (type
);
7640 /* Any qualifiers on a function type typedef have
7641 already been dealt with. */
7642 else if (TREE_CODE (type
) == FUNCTION_TYPE
)
7643 quals
= TYPE_UNQUALIFIED
;
7645 if (ctype
!= NULL_TREE
)
7646 grok_method_quals (ctype
, decl
, quals
);
7650 || (typedef_decl
&& C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl
)))
7651 C_TYPEDEF_EXPLICITLY_SIGNED (decl
) = 1;
7653 bad_specifiers (decl
, "type", virtualp
, quals
!= TYPE_UNQUALIFIED
,
7654 inlinep
, friendp
, raises
!= NULL_TREE
);
7659 /* Detect the case of an array type of unspecified size
7660 which came, as such, direct from a typedef name.
7661 We must copy the type, so that the array's domain can be
7662 individually set by the object's initializer. */
7664 if (type
&& typedef_type
7665 && TREE_CODE (type
) == ARRAY_TYPE
&& !TYPE_DOMAIN (type
)
7666 && TYPE_MAIN_VARIANT (type
) == TYPE_MAIN_VARIANT (typedef_type
))
7667 type
= build_cplus_array_type (TREE_TYPE (type
), NULL_TREE
);
7669 /* Detect where we're using a typedef of function type to declare a
7670 function. PARMS will not be set, so we must create it now. */
7672 if (type
== typedef_type
&& TREE_CODE (type
) == FUNCTION_TYPE
)
7674 tree decls
= NULL_TREE
;
7677 for (args
= TYPE_ARG_TYPES (type
); args
; args
= TREE_CHAIN (args
))
7679 tree decl
= cp_build_parm_decl (NULL_TREE
, TREE_VALUE (args
));
7681 TREE_CHAIN (decl
) = decls
;
7685 parms
= nreverse (decls
);
7687 if (decl_context
!= TYPENAME
)
7689 /* A cv-qualifier-seq shall only be part of the function type
7690 for a non-static member function. [8.3.5/4 dcl.fct] */
7691 if (cp_type_quals (type
) != TYPE_UNQUALIFIED
7692 && (current_class_type
== NULL_TREE
|| staticp
) )
7694 error ("qualified function types cannot be used to declare %s functions",
7695 (staticp
? "static member" : "free"));
7696 type
= TYPE_MAIN_VARIANT (type
);
7699 /* The qualifiers on the function type become the qualifiers on
7700 the non-static member function. */
7701 quals
|= cp_type_quals (type
);
7705 /* If this is a type name (such as, in a cast or sizeof),
7706 compute the type and return it now. */
7708 if (decl_context
== TYPENAME
)
7710 /* Note that the grammar rejects storage classes
7711 in typenames, fields or parameters. */
7712 if (type_quals
!= TYPE_UNQUALIFIED
)
7713 type_quals
= TYPE_UNQUALIFIED
;
7715 /* Special case: "friend class foo" looks like a TYPENAME context. */
7718 if (type_quals
!= TYPE_UNQUALIFIED
)
7720 error ("type qualifiers specified for friend class declaration");
7721 type_quals
= TYPE_UNQUALIFIED
;
7725 error ("%<inline%> specified for friend class declaration");
7731 /* Don't allow friend declaration without a class-key. */
7732 if (TREE_CODE (type
) == TEMPLATE_TYPE_PARM
)
7733 pedwarn ("template parameters cannot be friends");
7734 else if (TREE_CODE (type
) == TYPENAME_TYPE
)
7735 pedwarn ("friend declaration requires class-key, "
7736 "i.e. %<friend class %T::%D%>",
7737 TYPE_CONTEXT (type
), TYPENAME_TYPE_FULLNAME (type
));
7739 pedwarn ("friend declaration requires class-key, "
7740 "i.e. %<friend %#T%>",
7744 /* Only try to do this stuff if we didn't already give up. */
7745 if (type
!= integer_type_node
)
7747 /* A friendly class? */
7748 if (current_class_type
)
7749 make_friend_class (current_class_type
, TYPE_MAIN_VARIANT (type
),
7752 error ("trying to make class %qT a friend of global scope",
7755 type
= void_type_node
;
7760 if (ctype
== NULL_TREE
)
7762 if (TREE_CODE (type
) != METHOD_TYPE
)
7763 error ("invalid qualifiers on non-member function type");
7765 ctype
= TYPE_METHOD_BASETYPE (type
);
7769 tree dummy
= build_decl (TYPE_DECL
, unqualified_id
, type
);
7770 grok_method_quals (ctype
, dummy
, quals
);
7771 type
= TREE_TYPE (dummy
);
7777 else if (unqualified_id
== NULL_TREE
&& decl_context
!= PARM
7778 && decl_context
!= CATCHPARM
7779 && TREE_CODE (type
) != UNION_TYPE
7782 error ("abstract declarator %qT used as declaration", type
);
7783 return error_mark_node
;
7786 /* Only functions may be declared using an operator-function-id. */
7788 && IDENTIFIER_OPNAME_P (unqualified_id
)
7789 && TREE_CODE (type
) != FUNCTION_TYPE
7790 && TREE_CODE (type
) != METHOD_TYPE
)
7792 error ("declaration of %qD as non-function", unqualified_id
);
7793 return error_mark_node
;
7796 /* We don't check parameter types here because we can emit a better
7797 error message later. */
7798 if (decl_context
!= PARM
)
7799 type
= check_var_type (unqualified_id
, type
);
7801 /* Now create the decl, which may be a VAR_DECL, a PARM_DECL
7802 or a FUNCTION_DECL, depending on DECL_CONTEXT and TYPE. */
7804 if (decl_context
== PARM
|| decl_context
== CATCHPARM
)
7806 if (ctype
|| in_namespace
)
7807 error ("cannot use %<::%> in parameter declaration");
7809 /* A parameter declared as an array of T is really a pointer to T.
7810 One declared as a function is really a pointer to a function.
7811 One declared as a member is really a pointer to member. */
7813 if (TREE_CODE (type
) == ARRAY_TYPE
)
7815 /* Transfer const-ness of array into that of type pointed to. */
7816 type
= build_pointer_type (TREE_TYPE (type
));
7817 type_quals
= TYPE_UNQUALIFIED
;
7819 else if (TREE_CODE (type
) == FUNCTION_TYPE
)
7820 type
= build_pointer_type (type
);
7826 if (decl_context
== PARM
)
7828 decl
= cp_build_parm_decl (unqualified_id
, type
);
7830 bad_specifiers (decl
, "parameter", virtualp
, quals
!= TYPE_UNQUALIFIED
,
7831 inlinep
, friendp
, raises
!= NULL_TREE
);
7833 else if (decl_context
== FIELD
)
7835 /* The C99 flexible array extension. */
7836 if (!staticp
&& TREE_CODE (type
) == ARRAY_TYPE
7837 && TYPE_DOMAIN (type
) == NULL_TREE
)
7839 tree itype
= compute_array_index_type (dname
, integer_zero_node
);
7840 type
= build_cplus_array_type (TREE_TYPE (type
), itype
);
7843 if (type
== error_mark_node
)
7845 /* Happens when declaring arrays of sizes which
7846 are error_mark_node, for example. */
7849 else if (in_namespace
&& !friendp
)
7851 /* Something like struct S { int N::j; }; */
7852 error ("invalid use of %<::%>");
7855 else if (TREE_CODE (type
) == FUNCTION_TYPE
)
7858 tree function_context
;
7862 if (ctype
== NULL_TREE
)
7863 ctype
= current_class_type
;
7865 if (ctype
== NULL_TREE
)
7867 error ("can't make %qD into a method -- not in a class",
7869 return void_type_node
;
7872 /* ``A union may [ ... ] not [ have ] virtual functions.''
7874 if (virtualp
&& TREE_CODE (ctype
) == UNION_TYPE
)
7876 error ("function %qD declared virtual inside a union",
7878 return void_type_node
;
7881 if (NEW_DELETE_OPNAME_P (unqualified_id
))
7885 error ("%qD cannot be declared virtual, since it "
7891 else if (staticp
< 2)
7892 type
= build_method_type_directly (ctype
,
7894 TYPE_ARG_TYPES (type
));
7897 /* Check that the name used for a destructor makes sense. */
7898 if (sfk
== sfk_destructor
7899 && !same_type_p (TREE_OPERAND
7900 (id_declarator
->u
.id
.unqualified_name
, 0),
7903 error ("declaration of %qD as member of %qT",
7904 id_declarator
->u
.id
.unqualified_name
,
7906 return error_mark_node
;
7909 /* Tell grokfndecl if it needs to set TREE_PUBLIC on the node. */
7910 function_context
= (ctype
!= NULL_TREE
) ?
7911 decl_function_context (TYPE_MAIN_DECL (ctype
)) : NULL_TREE
;
7912 publicp
= (! friendp
|| ! staticp
)
7913 && function_context
== NULL_TREE
;
7914 decl
= grokfndecl (ctype
, type
,
7915 TREE_CODE (unqualified_id
) != TEMPLATE_ID_EXPR
7916 ? unqualified_id
: dname
,
7919 virtualp
, flags
, quals
, raises
,
7920 friendp
? -1 : 0, friendp
, publicp
, inlinep
,
7922 funcdef_flag
, template_count
, in_namespace
, attrlist
);
7923 if (decl
== NULL_TREE
)
7926 /* This clobbers the attrs stored in `decl' from `attrlist'. */
7927 /* The decl and setting of decl_attr is also turned off. */
7928 decl
= build_decl_attribute_variant (decl
, decl_attr
);
7931 /* [class.conv.ctor]
7933 A constructor declared without the function-specifier
7934 explicit that can be called with a single parameter
7935 specifies a conversion from the type of its first
7936 parameter to the type of its class. Such a constructor
7937 is called a converting constructor. */
7939 DECL_NONCONVERTING_P (decl
) = 1;
7940 else if (DECL_CONSTRUCTOR_P (decl
))
7942 /* The constructor can be called with exactly one
7943 parameter if there is at least one parameter, and
7944 any subsequent parameters have default arguments.
7945 Ignore any compiler-added parms. */
7946 tree arg_types
= FUNCTION_FIRST_USER_PARMTYPE (decl
);
7948 if (arg_types
== void_list_node
7950 && TREE_CHAIN (arg_types
)
7951 && TREE_CHAIN (arg_types
) != void_list_node
7952 && !TREE_PURPOSE (TREE_CHAIN (arg_types
))))
7953 DECL_NONCONVERTING_P (decl
) = 1;
7956 else if (TREE_CODE (type
) == METHOD_TYPE
)
7958 /* We only get here for friend declarations of
7959 members of other classes. */
7960 /* All method decls are public, so tell grokfndecl to set
7961 TREE_PUBLIC, also. */
7962 decl
= grokfndecl (ctype
, type
,
7963 TREE_CODE (unqualified_id
) != TEMPLATE_ID_EXPR
7964 ? unqualified_id
: dname
,
7967 virtualp
, flags
, quals
, raises
,
7968 friendp
? -1 : 0, friendp
, 1, 0, sfk
,
7969 funcdef_flag
, template_count
, in_namespace
,
7971 if (decl
== NULL_TREE
)
7974 else if (!staticp
&& !dependent_type_p (type
)
7975 && !COMPLETE_TYPE_P (complete_type (type
))
7976 && (TREE_CODE (type
) != ARRAY_TYPE
|| initialized
== 0))
7979 error ("field %qD has incomplete type", unqualified_id
);
7981 error ("name %qT has incomplete type", type
);
7983 /* If we're instantiating a template, tell them which
7984 instantiation made the field's type be incomplete. */
7985 if (current_class_type
7986 && TYPE_NAME (current_class_type
)
7987 && IDENTIFIER_TEMPLATE (TYPE_IDENTIFIER (current_class_type
))
7989 && declspecs
->type
== type
)
7990 error (" in instantiation of template %qT",
7991 current_class_type
);
7993 type
= error_mark_node
;
8000 error ("%qE is neither function nor member function; "
8001 "cannot be declared friend", unqualified_id
);
8009 /* Friends are treated specially. */
8010 if (ctype
== current_class_type
)
8011 warning ("member functions are implicitly friends of their class");
8012 else if (decl
&& DECL_NAME (decl
))
8014 if (template_class_depth (current_class_type
) == 0)
8016 decl
= check_explicit_specialization
8017 (unqualified_id
, decl
, template_count
,
8018 2 * (funcdef_flag
!= 0) + 4);
8019 if (decl
== error_mark_node
)
8020 return error_mark_node
;
8023 decl
= do_friend (ctype
, unqualified_id
, decl
,
8024 *attrlist
, flags
, quals
, funcdef_flag
);
8028 return void_type_node
;
8031 /* Structure field. It may not be a function, except for C++. */
8033 if (decl
== NULL_TREE
)
8039 /* An attempt is being made to initialize a non-static
8040 member. But, from [class.mem]:
8042 4 A member-declarator can contain a
8043 constant-initializer only if it declares a static
8044 member (_class.static_) of integral or enumeration
8045 type, see _class.static.data_.
8047 This used to be relatively common practice, but
8048 the rest of the compiler does not correctly
8049 handle the initialization unless the member is
8050 static so we make it static below. */
8051 pedwarn ("ISO C++ forbids initialization of member %qD",
8053 pedwarn ("making %qD static", unqualified_id
);
8057 if (uses_template_parms (type
))
8058 /* We'll check at instantiation time. */
8060 else if (check_static_variable_definition (unqualified_id
,
8062 /* If we just return the declaration, crashes
8063 will sometimes occur. We therefore return
8064 void_type_node, as if this was a friend
8065 declaration, to cause callers to completely
8066 ignore this declaration. */
8067 return void_type_node
;
8072 /* C++ allows static class members. All other work
8073 for this is done by grokfield. */
8074 decl
= build_lang_decl (VAR_DECL
, unqualified_id
, type
);
8075 set_linkage_for_static_data_member (decl
);
8076 /* Even if there is an in-class initialization, DECL
8077 is considered undefined until an out-of-class
8078 definition is provided. */
8079 DECL_EXTERNAL (decl
) = 1;
8083 decl
= build_decl (FIELD_DECL
, unqualified_id
, type
);
8084 DECL_NONADDRESSABLE_P (decl
) = bitfield
;
8085 if (storage_class
== sc_mutable
)
8087 DECL_MUTABLE_P (decl
) = 1;
8088 storage_class
= sc_none
;
8092 bad_specifiers (decl
, "field", virtualp
, quals
!= TYPE_UNQUALIFIED
,
8093 inlinep
, friendp
, raises
!= NULL_TREE
);
8096 else if (TREE_CODE (type
) == FUNCTION_TYPE
8097 || TREE_CODE (type
) == METHOD_TYPE
)
8102 if (!unqualified_id
)
8105 if (TREE_CODE (unqualified_id
) == TEMPLATE_ID_EXPR
)
8106 original_name
= dname
;
8108 original_name
= unqualified_id
;
8110 if (storage_class
== sc_auto
)
8111 error ("storage class %<auto%> invalid for function %qs", name
);
8112 else if (storage_class
== sc_register
)
8113 error ("storage class %<register%> invalid for function %qs", name
);
8115 error ("storage class %<__thread%> invalid for function %qs", name
);
8117 /* Function declaration not at top level.
8118 Storage classes other than `extern' are not allowed
8119 and `extern' makes no difference. */
8120 if (! toplevel_bindings_p ()
8121 && (storage_class
== sc_static
8122 || declspecs
->specs
[(int)ds_inline
])
8125 if (storage_class
== sc_static
)
8126 pedwarn ("%<static%> specified invalid for function %qs "
8127 "declared out of global scope", name
);
8129 pedwarn ("%<inline%> specifier invalid for function %qs "
8130 "declared out of global scope", name
);
8133 if (ctype
== NULL_TREE
)
8137 error ("virtual non-class function %qs", name
);
8141 else if (TREE_CODE (type
) == FUNCTION_TYPE
&& staticp
< 2
8142 && !NEW_DELETE_OPNAME_P (original_name
))
8143 type
= build_method_type_directly (ctype
,
8145 TYPE_ARG_TYPES (type
));
8147 /* Record presence of `static'. */
8148 publicp
= (ctype
!= NULL_TREE
8149 || storage_class
== sc_extern
8150 || storage_class
!= sc_static
);
8152 decl
= grokfndecl (ctype
, type
, original_name
, parms
, unqualified_id
,
8153 virtualp
, flags
, quals
, raises
,
8155 publicp
, inlinep
, sfk
, funcdef_flag
,
8156 template_count
, in_namespace
, attrlist
);
8157 if (decl
== NULL_TREE
)
8162 int invalid_static
= 0;
8164 /* Don't allow a static member function in a class, and forbid
8165 declaring main to be static. */
8166 if (TREE_CODE (type
) == METHOD_TYPE
)
8168 pedwarn ("cannot declare member function %qD to have "
8169 "static linkage", decl
);
8172 else if (current_function_decl
)
8174 /* FIXME need arm citation */
8175 error ("cannot declare static function inside another function");
8182 storage_class
= sc_none
;
8188 /* It's a variable. */
8190 /* An uninitialized decl with `extern' is a reference. */
8191 decl
= grokvardecl (type
, unqualified_id
,
8194 (type_quals
& TYPE_QUAL_CONST
) != 0,
8195 ctype
? ctype
: in_namespace
);
8196 bad_specifiers (decl
, "variable", virtualp
, quals
!= TYPE_UNQUALIFIED
,
8197 inlinep
, friendp
, raises
!= NULL_TREE
);
8201 DECL_CONTEXT (decl
) = ctype
;
8204 pedwarn ("%<static%> may not be used when defining "
8205 "(as opposed to declaring) a static data member");
8207 storage_class
= sc_none
;
8209 if (storage_class
== sc_register
&& TREE_STATIC (decl
))
8211 error ("static member %qD declared %<register%>", decl
);
8212 storage_class
= sc_none
;
8214 if (storage_class
== sc_extern
&& pedantic
)
8216 pedwarn ("cannot explicitly declare member %q#D to have "
8219 storage_class
= sc_none
;
8224 /* Record `register' declaration for warnings on &
8225 and in case doing stupid register allocation. */
8227 if (storage_class
== sc_register
)
8228 DECL_REGISTER (decl
) = 1;
8229 else if (storage_class
== sc_extern
)
8230 DECL_THIS_EXTERN (decl
) = 1;
8231 else if (storage_class
== sc_static
)
8232 DECL_THIS_STATIC (decl
) = 1;
8234 /* Record constancy and volatility. There's no need to do this
8235 when processing a template; we'll do this for the instantiated
8236 declaration based on the type of DECL. */
8237 if (!processing_template_decl
)
8238 cp_apply_type_quals_to_decl (type_quals
, decl
);
8244 /* Subroutine of start_function. Ensure that each of the parameter
8245 types (as listed in PARMS) is complete, as is required for a
8246 function definition. */
8249 require_complete_types_for_parms (tree parms
)
8251 for (; parms
; parms
= TREE_CHAIN (parms
))
8253 if (dependent_type_p (TREE_TYPE (parms
)))
8255 if (VOID_TYPE_P (TREE_TYPE (parms
)))
8256 /* grokparms will have already issued an error. */
8257 TREE_TYPE (parms
) = error_mark_node
;
8258 else if (complete_type_or_else (TREE_TYPE (parms
), parms
))
8260 layout_decl (parms
, 0);
8261 DECL_ARG_TYPE (parms
) = type_passed_as (TREE_TYPE (parms
));
8266 /* Returns nonzero if T is a local variable. */
8269 local_variable_p (tree t
)
8271 if ((TREE_CODE (t
) == VAR_DECL
8272 /* A VAR_DECL with a context that is a _TYPE is a static data
8274 && !TYPE_P (CP_DECL_CONTEXT (t
))
8275 /* Any other non-local variable must be at namespace scope. */
8276 && !DECL_NAMESPACE_SCOPE_P (t
))
8277 || (TREE_CODE (t
) == PARM_DECL
))
8283 /* Returns nonzero if T is an automatic local variable or a label.
8284 (These are the declarations that need to be remapped when the code
8285 containing them is duplicated.) */
8288 nonstatic_local_decl_p (tree t
)
8290 return ((local_variable_p (t
) && !TREE_STATIC (t
))
8291 || TREE_CODE (t
) == LABEL_DECL
8292 || TREE_CODE (t
) == RESULT_DECL
);
8295 /* Like local_variable_p, but suitable for use as a tree-walking
8299 local_variable_p_walkfn (tree
*tp
, int *walk_subtrees
,
8300 void *data ATTRIBUTE_UNUSED
)
8302 if (local_variable_p (*tp
) && !DECL_ARTIFICIAL (*tp
))
8304 else if (TYPE_P (*tp
))
8311 /* Check that ARG, which is a default-argument expression for a
8312 parameter DECL, is valid. Returns ARG, or ERROR_MARK_NODE, if
8313 something goes wrong. DECL may also be a _TYPE node, rather than a
8314 DECL, if there is no DECL available. */
8317 check_default_argument (tree decl
, tree arg
)
8322 if (TREE_CODE (arg
) == DEFAULT_ARG
)
8323 /* We get a DEFAULT_ARG when looking at an in-class declaration
8324 with a default argument. Ignore the argument for now; we'll
8325 deal with it after the class is complete. */
8328 if (processing_template_decl
|| uses_template_parms (arg
))
8329 /* We don't do anything checking until instantiation-time. Note
8330 that there may be uninstantiated arguments even for an
8331 instantiated function, since default arguments are not
8332 instantiated until they are needed. */
8341 decl_type
= TREE_TYPE (decl
);
8343 if (arg
== error_mark_node
8344 || decl
== error_mark_node
8345 || TREE_TYPE (arg
) == error_mark_node
8346 || decl_type
== error_mark_node
)
8347 /* Something already went wrong. There's no need to check
8349 return error_mark_node
;
8351 /* [dcl.fct.default]
8353 A default argument expression is implicitly converted to the
8355 if (!TREE_TYPE (arg
)
8356 || !can_convert_arg (decl_type
, TREE_TYPE (arg
), arg
))
8359 error ("default argument for %q#D has type %qT",
8360 decl
, TREE_TYPE (arg
));
8362 error ("default argument for parameter of type %qT has type %qT",
8363 decl_type
, TREE_TYPE (arg
));
8365 return error_mark_node
;
8368 /* [dcl.fct.default]
8370 Local variables shall not be used in default argument
8373 The keyword `this' shall not be used in a default argument of a
8375 var
= walk_tree_without_duplicates (&arg
, local_variable_p_walkfn
,
8379 error ("default argument %qE uses local variable %qD", arg
, var
);
8380 return error_mark_node
;
8387 /* Decode the list of parameter types for a function type.
8388 Given the list of things declared inside the parens,
8389 return a list of types.
8391 If this parameter does not end with an ellipsis, we append
8394 *PARMS is set to the chain of PARM_DECLs created. */
8397 grokparms (cp_parameter_declarator
*first_parm
, tree
*parms
)
8399 tree result
= NULL_TREE
;
8400 tree decls
= NULL_TREE
;
8401 int ellipsis
= !first_parm
|| first_parm
->ellipsis_p
;
8402 cp_parameter_declarator
*parm
;
8405 for (parm
= first_parm
; parm
!= NULL
; parm
= parm
->next
)
8407 tree type
= NULL_TREE
;
8408 tree init
= parm
->default_argument
;
8412 if (parm
== no_parameters
)
8415 attrs
= parm
->decl_specifiers
.attributes
;
8416 parm
->decl_specifiers
.attributes
= NULL_TREE
;
8417 decl
= grokdeclarator (parm
->declarator
, &parm
->decl_specifiers
,
8418 PARM
, init
!= NULL_TREE
, &attrs
);
8419 if (! decl
|| TREE_TYPE (decl
) == error_mark_node
)
8423 cplus_decl_attributes (&decl
, attrs
, 0);
8425 type
= TREE_TYPE (decl
);
8426 if (VOID_TYPE_P (type
))
8428 if (same_type_p (type
, void_type_node
)
8429 && !DECL_NAME (decl
) && !result
&& !parm
->next
&& !ellipsis
)
8430 /* this is a parmlist of `(void)', which is ok. */
8432 cxx_incomplete_type_error (decl
, type
);
8433 /* It's not a good idea to actually create parameters of
8434 type `void'; other parts of the compiler assume that a
8435 void type terminates the parameter list. */
8436 type
= error_mark_node
;
8437 TREE_TYPE (decl
) = error_mark_node
;
8440 if (type
!= error_mark_node
)
8442 /* Top-level qualifiers on the parameters are
8443 ignored for function types. */
8444 type
= cp_build_qualified_type (type
, 0);
8445 if (TREE_CODE (type
) == METHOD_TYPE
)
8447 error ("parameter %qD invalidly declared method type", decl
);
8448 type
= build_pointer_type (type
);
8449 TREE_TYPE (decl
) = type
;
8451 else if (abstract_virtuals_error (decl
, type
))
8452 any_error
= 1; /* Seems like a good idea. */
8453 else if (POINTER_TYPE_P (type
))
8455 /* [dcl.fct]/6, parameter types cannot contain pointers
8456 (references) to arrays of unknown bound. */
8457 tree t
= TREE_TYPE (type
);
8458 int ptr
= TYPE_PTR_P (type
);
8464 else if (TREE_CODE (t
) != ARRAY_TYPE
)
8466 else if (!TYPE_DOMAIN (t
))
8470 if (TREE_CODE (t
) == ARRAY_TYPE
)
8471 error ("parameter %qD includes %s to array of unknown "
8473 decl
, ptr
? "pointer" : "reference", t
);
8476 if (!any_error
&& init
)
8477 init
= check_default_argument (decl
, init
);
8482 TREE_CHAIN (decl
) = decls
;
8484 result
= tree_cons (init
, type
, result
);
8486 decls
= nreverse (decls
);
8487 result
= nreverse (result
);
8489 result
= chainon (result
, void_list_node
);
8496 /* D is a constructor or overloaded `operator='.
8498 Let T be the class in which D is declared. Then, this function
8501 -1 if D's is an ill-formed constructor or copy assignment operator
8502 whose first parameter is of type `T'.
8503 0 if D is not a copy constructor or copy assignment
8505 1 if D is a copy constructor or copy assignment operator whose
8506 first parameter is a reference to const qualified T.
8507 2 if D is a copy constructor or copy assignment operator whose
8508 first parameter is a reference to non-const qualified T.
8510 This function can be used as a predicate. Positive values indicate
8511 a copy constructor and nonzero values indicate a copy assignment
8521 gcc_assert (DECL_FUNCTION_MEMBER_P (d
));
8523 if (DECL_TEMPLATE_INFO (d
)
8524 && DECL_MEMBER_TEMPLATE_P (DECL_TI_TEMPLATE (d
)))
8525 /* Instantiations of template member functions are never copy
8526 functions. Note that member functions of templated classes are
8527 represented as template functions internally, and we must
8528 accept those as copy functions. */
8531 args
= FUNCTION_FIRST_USER_PARMTYPE (d
);
8535 arg_type
= TREE_VALUE (args
);
8537 if (TYPE_MAIN_VARIANT (arg_type
) == DECL_CONTEXT (d
))
8539 /* Pass by value copy assignment operator. */
8542 else if (TREE_CODE (arg_type
) == REFERENCE_TYPE
8543 && TYPE_MAIN_VARIANT (TREE_TYPE (arg_type
)) == DECL_CONTEXT (d
))
8545 if (CP_TYPE_CONST_P (TREE_TYPE (arg_type
)))
8551 args
= TREE_CHAIN (args
);
8553 if (args
&& args
!= void_list_node
&& !TREE_PURPOSE (args
))
8554 /* There are more non-optional args. */
8560 /* Remember any special properties of member function DECL. */
8562 void grok_special_member_properties (tree decl
)
8564 if (!DECL_NONSTATIC_MEMBER_FUNCTION_P(decl
))
8565 ; /* Not special. */
8566 else if (DECL_CONSTRUCTOR_P (decl
))
8568 int ctor
= copy_fn_p (decl
);
8574 A non-template constructor for class X is a copy
8575 constructor if its first parameter is of type X&, const
8576 X&, volatile X& or const volatile X&, and either there
8577 are no other parameters or else all other parameters have
8578 default arguments. */
8579 TYPE_HAS_INIT_REF (DECL_CONTEXT (decl
)) = 1;
8581 TYPE_HAS_CONST_INIT_REF (DECL_CONTEXT (decl
)) = 1;
8583 else if (sufficient_parms_p (FUNCTION_FIRST_USER_PARMTYPE (decl
)))
8584 TYPE_HAS_DEFAULT_CONSTRUCTOR (DECL_CONTEXT (decl
)) = 1;
8586 else if (DECL_OVERLOADED_OPERATOR_P (decl
) == NOP_EXPR
)
8590 A non-template assignment operator for class X is a copy
8591 assignment operator if its parameter is of type X, X&, const
8592 X&, volatile X& or const volatile X&. */
8594 int assop
= copy_fn_p (decl
);
8598 TYPE_HAS_ASSIGN_REF (DECL_CONTEXT (decl
)) = 1;
8600 TYPE_HAS_CONST_ASSIGN_REF (DECL_CONTEXT (decl
)) = 1;
8605 /* Check a constructor DECL has the correct form. Complains
8606 if the class has a constructor of the form X(X). */
8609 grok_ctor_properties (tree ctype
, tree decl
)
8611 int ctor_parm
= copy_fn_p (decl
);
8617 A declaration of a constructor for a class X is ill-formed if
8618 its first parameter is of type (optionally cv-qualified) X
8619 and either there are no other parameters or else all other
8620 parameters have default arguments.
8622 We *don't* complain about member template instantiations that
8623 have this form, though; they can occur as we try to decide
8624 what constructor to use during overload resolution. Since
8625 overload resolution will never prefer such a constructor to
8626 the non-template copy constructor (which is either explicitly
8627 or implicitly defined), there's no need to worry about their
8628 existence. Theoretically, they should never even be
8629 instantiated, but that's hard to forestall. */
8630 error ("invalid constructor; you probably meant %<%T (const %T&)%>",
8638 /* An operator with this code is unary, but can also be binary. */
8641 ambi_op_p (enum tree_code code
)
8643 return (code
== INDIRECT_REF
8644 || code
== ADDR_EXPR
8645 || code
== CONVERT_EXPR
8646 || code
== NEGATE_EXPR
8647 || code
== PREINCREMENT_EXPR
8648 || code
== PREDECREMENT_EXPR
);
8651 /* An operator with this name can only be unary. */
8654 unary_op_p (enum tree_code code
)
8656 return (code
== TRUTH_NOT_EXPR
8657 || code
== BIT_NOT_EXPR
8658 || code
== COMPONENT_REF
8659 || code
== TYPE_EXPR
);
8662 /* DECL is a declaration for an overloaded operator. Returns true if
8663 the declaration is valid; false otherwise. If COMPLAIN is true,
8664 errors are issued for invalid declarations. */
8667 grok_op_properties (tree decl
, int friendp
, bool complain
)
8669 tree argtypes
= TYPE_ARG_TYPES (TREE_TYPE (decl
));
8671 int methodp
= (TREE_CODE (TREE_TYPE (decl
)) == METHOD_TYPE
);
8672 tree name
= DECL_NAME (decl
);
8673 enum tree_code operator_code
;
8677 /* Assume that the declaration is valid. */
8680 /* Count the number of arguments. */
8681 for (argtype
= argtypes
, arity
= 0;
8682 argtype
&& argtype
!= void_list_node
;
8683 argtype
= TREE_CHAIN (argtype
))
8686 if (current_class_type
== NULL_TREE
)
8689 if (DECL_CONV_FN_P (decl
))
8690 operator_code
= TYPE_EXPR
;
8694 #define DEF_OPERATOR(NAME, CODE, MANGLING, ARITY, ASSN_P) \
8695 if (ansi_opname (CODE) == name) \
8697 operator_code = (CODE); \
8700 else if (ansi_assopname (CODE) == name) \
8702 operator_code = (CODE); \
8703 DECL_ASSIGNMENT_OPERATOR_P (decl) = 1; \
8707 #include "operators.def"
8713 gcc_assert (operator_code
!= LAST_CPLUS_TREE_CODE
);
8714 SET_OVERLOADED_OPERATOR_CODE (decl
, operator_code
);
8718 switch (operator_code
)
8721 TYPE_HAS_NEW_OPERATOR (current_class_type
) = 1;
8725 TYPE_GETS_DELETE (current_class_type
) |= 1;
8729 TYPE_HAS_ARRAY_NEW_OPERATOR (current_class_type
) = 1;
8732 case VEC_DELETE_EXPR
:
8733 TYPE_GETS_DELETE (current_class_type
) |= 2;
8741 /* [basic.std.dynamic.allocation]/1:
8743 A program is ill-formed if an allocation function is declared
8744 in a namespace scope other than global scope or declared static
8747 The same also holds true for deallocation functions. */
8748 if (operator_code
== NEW_EXPR
|| operator_code
== VEC_NEW_EXPR
8749 || operator_code
== DELETE_EXPR
|| operator_code
== VEC_DELETE_EXPR
)
8751 if (DECL_NAMESPACE_SCOPE_P (decl
))
8753 if (CP_DECL_CONTEXT (decl
) != global_namespace
)
8754 error ("%qD may not be declared within a namespace", decl
);
8755 else if (!TREE_PUBLIC (decl
))
8756 error ("%qD may not be declared as static", decl
);
8760 if (operator_code
== NEW_EXPR
|| operator_code
== VEC_NEW_EXPR
)
8761 TREE_TYPE (decl
) = coerce_new_type (TREE_TYPE (decl
));
8762 else if (operator_code
== DELETE_EXPR
|| operator_code
== VEC_DELETE_EXPR
)
8763 TREE_TYPE (decl
) = coerce_delete_type (TREE_TYPE (decl
));
8766 /* An operator function must either be a non-static member function
8767 or have at least one parameter of a class, a reference to a class,
8768 an enumeration, or a reference to an enumeration. 13.4.0.6 */
8769 if (! methodp
|| DECL_STATIC_FUNCTION_P (decl
))
8771 if (operator_code
== TYPE_EXPR
8772 || operator_code
== CALL_EXPR
8773 || operator_code
== COMPONENT_REF
8774 || operator_code
== ARRAY_REF
8775 || operator_code
== NOP_EXPR
)
8776 error ("%qD must be a nonstatic member function", decl
);
8781 if (DECL_STATIC_FUNCTION_P (decl
))
8782 error ("%qD must be either a non-static member "
8783 "function or a non-member function", decl
);
8785 for (p
= argtypes
; p
&& p
!= void_list_node
; p
= TREE_CHAIN (p
))
8787 tree arg
= non_reference (TREE_VALUE (p
));
8788 /* IS_AGGR_TYPE, rather than CLASS_TYPE_P, is used
8789 because these checks are performed even on
8790 template functions. */
8791 if (IS_AGGR_TYPE (arg
) || TREE_CODE (arg
) == ENUMERAL_TYPE
)
8795 if (!p
|| p
== void_list_node
)
8800 error ("%qD must have an argument of class or "
8808 /* There are no restrictions on the arguments to an overloaded
8810 if (operator_code
== CALL_EXPR
)
8813 if (IDENTIFIER_TYPENAME_P (name
) && ! DECL_TEMPLATE_INFO (decl
))
8815 tree t
= TREE_TYPE (name
);
8818 int ref
= (TREE_CODE (t
) == REFERENCE_TYPE
);
8819 const char *what
= 0;
8822 t
= TYPE_MAIN_VARIANT (TREE_TYPE (t
));
8824 if (TREE_CODE (t
) == VOID_TYPE
)
8826 else if (t
== current_class_type
)
8827 what
= "the same type";
8828 /* Don't force t to be complete here. */
8829 else if (IS_AGGR_TYPE (t
)
8830 && COMPLETE_TYPE_P (t
)
8831 && DERIVED_FROM_P (t
, current_class_type
))
8832 what
= "a base class";
8834 if (what
&& warn_conversion
)
8835 warning ("conversion to %s%s will never use a type "
8836 "conversion operator",
8837 ref
? "a reference to " : "", what
);
8840 if (operator_code
== COND_EXPR
)
8843 error ("ISO C++ prohibits overloading operator ?:");
8845 else if (ambi_op_p (operator_code
))
8848 /* We pick the one-argument operator codes by default, so
8849 we don't have to change anything. */
8851 else if (arity
== 2)
8853 /* If we thought this was a unary operator, we now know
8854 it to be a binary operator. */
8855 switch (operator_code
)
8858 operator_code
= MULT_EXPR
;
8862 operator_code
= BIT_AND_EXPR
;
8866 operator_code
= PLUS_EXPR
;
8870 operator_code
= MINUS_EXPR
;
8873 case PREINCREMENT_EXPR
:
8874 operator_code
= POSTINCREMENT_EXPR
;
8877 case PREDECREMENT_EXPR
:
8878 operator_code
= POSTDECREMENT_EXPR
;
8885 SET_OVERLOADED_OPERATOR_CODE (decl
, operator_code
);
8887 if ((operator_code
== POSTINCREMENT_EXPR
8888 || operator_code
== POSTDECREMENT_EXPR
)
8889 && ! processing_template_decl
8890 && ! same_type_p (TREE_VALUE (TREE_CHAIN (argtypes
)), integer_type_node
))
8893 error ("postfix %qD must take %<int%> as its argument",
8897 ("postfix %qD must take %<int%> as its second argument",
8904 error ("%qD must take either zero or one argument", decl
);
8906 error ("%qD must take either one or two arguments", decl
);
8909 /* More Effective C++ rule 6. */
8911 && (operator_code
== POSTINCREMENT_EXPR
8912 || operator_code
== POSTDECREMENT_EXPR
8913 || operator_code
== PREINCREMENT_EXPR
8914 || operator_code
== PREDECREMENT_EXPR
))
8916 tree arg
= TREE_VALUE (argtypes
);
8917 tree ret
= TREE_TYPE (TREE_TYPE (decl
));
8918 if (methodp
|| TREE_CODE (arg
) == REFERENCE_TYPE
)
8919 arg
= TREE_TYPE (arg
);
8920 arg
= TYPE_MAIN_VARIANT (arg
);
8921 if (operator_code
== PREINCREMENT_EXPR
8922 || operator_code
== PREDECREMENT_EXPR
)
8924 if (TREE_CODE (ret
) != REFERENCE_TYPE
8925 || !same_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (ret
)),
8927 warning ("prefix %qD should return %qT", decl
,
8928 build_reference_type (arg
));
8932 if (!same_type_p (TYPE_MAIN_VARIANT (ret
), arg
))
8933 warning ("postfix %qD should return %qT", decl
, arg
);
8937 else if (unary_op_p (operator_code
))
8942 error ("%qD must take %<void%>", decl
);
8944 error ("%qD must take exactly one argument", decl
);
8947 else /* if (binary_op_p (operator_code)) */
8952 error ("%qD must take exactly one argument", decl
);
8954 error ("%qD must take exactly two arguments", decl
);
8957 /* More Effective C++ rule 7. */
8959 && (operator_code
== TRUTH_ANDIF_EXPR
8960 || operator_code
== TRUTH_ORIF_EXPR
8961 || operator_code
== COMPOUND_EXPR
))
8962 warning ("user-defined %qD always evaluates both arguments",
8966 /* Effective C++ rule 23. */
8969 && !DECL_ASSIGNMENT_OPERATOR_P (decl
)
8970 && (operator_code
== PLUS_EXPR
8971 || operator_code
== MINUS_EXPR
8972 || operator_code
== TRUNC_DIV_EXPR
8973 || operator_code
== MULT_EXPR
8974 || operator_code
== TRUNC_MOD_EXPR
)
8975 && TREE_CODE (TREE_TYPE (TREE_TYPE (decl
))) == REFERENCE_TYPE
)
8976 warning ("%qD should return by value", decl
);
8979 for (; argtypes
&& argtypes
!= void_list_node
;
8980 argtypes
= TREE_CHAIN (argtypes
))
8981 if (TREE_PURPOSE (argtypes
))
8983 TREE_PURPOSE (argtypes
) = NULL_TREE
;
8984 if (operator_code
== POSTINCREMENT_EXPR
8985 || operator_code
== POSTDECREMENT_EXPR
)
8988 pedwarn ("%qD cannot have default arguments", decl
);
8991 error ("%qD cannot have default arguments", decl
);
8999 /* Return a string giving the keyword associate with CODE. */
9002 tag_name (enum tag_types code
)
9021 /* Name lookup in an elaborated-type-specifier (after the keyword
9022 indicated by TAG_CODE) has found the TYPE_DECL DECL. If the
9023 elaborated-type-specifier is invalid, issue a diagnostic and return
9024 error_mark_node; otherwise, return the *_TYPE to which it referred.
9025 If ALLOW_TEMPLATE_P is true, TYPE may be a class template. */
9028 check_elaborated_type_specifier (enum tag_types tag_code
,
9030 bool allow_template_p
)
9036 struct S { struct S *p; };
9038 name lookup will find the TYPE_DECL for the implicit "S::S"
9039 typedef. Adjust for that here. */
9040 if (DECL_SELF_REFERENCE_P (decl
))
9041 decl
= TYPE_NAME (TREE_TYPE (decl
));
9043 type
= TREE_TYPE (decl
);
9045 /* Check TEMPLATE_TYPE_PARM first because DECL_IMPLICIT_TYPEDEF_P
9046 is false for this case as well. */
9047 if (TREE_CODE (type
) == TEMPLATE_TYPE_PARM
)
9049 error ("using template type parameter %qT after %qs",
9050 type
, tag_name (tag_code
));
9051 return error_mark_node
;
9055 If the identifier resolves to a typedef-name or a template
9056 type-parameter, the elaborated-type-specifier is ill-formed.
9058 In other words, the only legitimate declaration to use in the
9059 elaborated type specifier is the implicit typedef created when
9060 the type is declared. */
9061 else if (!DECL_IMPLICIT_TYPEDEF_P (decl
)
9062 && tag_code
!= typename_type
)
9064 error ("using typedef-name %qD after %qs", decl
, tag_name (tag_code
));
9065 cp_error_at ("%qD has a previous declaration here", decl
);
9066 return error_mark_node
;
9068 else if (TREE_CODE (type
) != RECORD_TYPE
9069 && TREE_CODE (type
) != UNION_TYPE
9070 && tag_code
!= enum_type
9071 && tag_code
!= typename_type
)
9073 error ("%qT referred to as %qs", type
, tag_name (tag_code
));
9074 cp_error_at ("%qT has a previous declaration here", type
);
9075 return error_mark_node
;
9077 else if (TREE_CODE (type
) != ENUMERAL_TYPE
9078 && tag_code
== enum_type
9079 && tag_code
!= typename_type
)
9081 error ("%qT referred to as enum", type
);
9082 cp_error_at ("%qT has a previous declaration here", type
);
9083 return error_mark_node
;
9085 else if (!allow_template_p
9086 && TREE_CODE (type
) == RECORD_TYPE
9087 && CLASSTYPE_IS_TEMPLATE (type
))
9089 /* If a class template appears as elaborated type specifier
9090 without a template header such as:
9092 template <class T> class C {};
9093 void f(class C); // No template header here
9095 then the required template argument is missing. */
9097 error ("template argument required for %<%s %T%>",
9098 tag_name (tag_code
),
9099 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type
)));
9100 return error_mark_node
;
9106 /* Lookup NAME in elaborate type specifier in scope according to
9107 SCOPE and issue diagnostics if necessary.
9108 Return *_TYPE node upon success, NULL_TREE when the NAME is not
9109 found, and ERROR_MARK_NODE for type error. */
9112 lookup_and_check_tag (enum tag_types tag_code
, tree name
,
9113 tag_scope scope
, bool template_header_p
)
9117 if (scope
== ts_global
)
9118 decl
= lookup_name (name
, 2);
9120 decl
= lookup_type_scope (name
, scope
);
9122 if (decl
&& DECL_CLASS_TEMPLATE_P (decl
))
9123 decl
= DECL_TEMPLATE_RESULT (decl
);
9125 if (decl
&& TREE_CODE (decl
) == TYPE_DECL
)
9127 /* Look for invalid nested type:
9131 if (scope
== ts_current
&& DECL_SELF_REFERENCE_P (decl
))
9133 error ("%qD has the same name as the class in which it is "
9136 return error_mark_node
;
9139 /* Two cases we need to consider when deciding if a class
9140 template is allowed as an elaborated type specifier:
9141 1. It is a self reference to its own class.
9142 2. It comes with a template header.
9146 template <class T> class C {
9147 class C *c1; // DECL_SELF_REFERENCE_P is true
9150 template <class U> class C; // template_header_p is true
9151 template <class T> class C<T>::D {
9152 class C *c2; // DECL_SELF_REFERENCE_P is true
9155 t
= check_elaborated_type_specifier (tag_code
,
9158 | DECL_SELF_REFERENCE_P (decl
));
9165 /* Get the struct, enum or union (TAG_CODE says which) with tag NAME.
9166 Define the tag as a forward-reference if it is not defined.
9168 If a declaration is given, process it here, and report an error if
9169 multiple declarations are not identical.
9171 SCOPE is TS_CURRENT when this is also a definition. Only look in
9172 the current frame for the name (since C++ allows new names in any
9173 scope.) It is TS_WITHIN_ENCLOSING_NON_CLASS if this is a friend
9174 declaration. Only look beginning from the current scope outward up
9175 till the nearest non-class scope. Otherwise it is TS_GLOBAL.
9177 TEMPLATE_HEADER_P is true when this declaration is preceded by
9178 a set of template parameters. */
9181 xref_tag (enum tag_types tag_code
, tree name
,
9182 tag_scope scope
, bool template_header_p
)
9184 enum tree_code code
;
9186 tree context
= NULL_TREE
;
9188 timevar_push (TV_NAME_LOOKUP
);
9190 gcc_assert (TREE_CODE (name
) == IDENTIFIER_NODE
);
9202 code
= ENUMERAL_TYPE
;
9208 /* In case of anonymous name, xref_tag is only called to
9209 make type node and push name. Name lookup is not required. */
9210 if (ANON_AGGRNAME_P (name
))
9213 t
= lookup_and_check_tag (tag_code
, name
,
9214 scope
, template_header_p
);
9216 if (t
== error_mark_node
)
9217 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP
, error_mark_node
);
9219 if (scope
!= ts_current
&& t
&& current_class_type
9220 && template_class_depth (current_class_type
)
9221 && template_header_p
)
9223 /* Since SCOPE is not TS_CURRENT, we are not looking at a
9224 definition of this tag. Since, in addition, we are currently
9225 processing a (member) template declaration of a template
9226 class, we must be very careful; consider:
9233 { template <class V>
9234 friend struct S1; };
9236 Here, the S2::S1 declaration should not be confused with the
9237 outer declaration. In particular, the inner version should
9238 have a template parameter of level 2, not level 1. This
9239 would be particularly important if the member declaration
9242 template <class V = U> friend struct S1;
9244 say, when we should tsubst into `U' when instantiating
9245 S2. On the other hand, when presented with:
9255 we must find the inner binding eventually. We
9256 accomplish this by making sure that the new type we
9257 create to represent this declaration has the right
9259 context
= TYPE_CONTEXT (t
);
9265 /* If no such tag is yet defined, create a forward-reference node
9266 and record it as the "definition".
9267 When a real declaration of this type is found,
9268 the forward-reference will be altered into a real type. */
9269 if (code
== ENUMERAL_TYPE
)
9271 error ("use of enum %q#D without previous declaration", name
);
9272 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP
, error_mark_node
);
9276 t
= make_aggr_type (code
);
9277 TYPE_CONTEXT (t
) = context
;
9278 /* pushtag only cares whether SCOPE is zero or not. */
9279 t
= pushtag (name
, t
, scope
!= ts_current
);
9284 if (template_header_p
&& IS_AGGR_TYPE (t
))
9285 redeclare_class_template (t
, current_template_parms
);
9286 else if (!processing_template_decl
9288 && CLASSTYPE_IS_TEMPLATE (t
))
9290 error ("redeclaration of %qT as a non-template", t
);
9291 t
= error_mark_node
;
9295 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP
, t
);
9299 xref_tag_from_type (tree old
, tree id
, tag_scope scope
)
9301 enum tag_types tag_kind
;
9303 if (TREE_CODE (old
) == RECORD_TYPE
)
9304 tag_kind
= (CLASSTYPE_DECLARED_CLASS (old
) ? class_type
: record_type
);
9306 tag_kind
= union_type
;
9308 if (id
== NULL_TREE
)
9309 id
= TYPE_IDENTIFIER (old
);
9311 return xref_tag (tag_kind
, id
, scope
, false);
9314 /* Create the binfo hierarchy for REF with (possibly NULL) base list
9315 BASE_LIST. For each element on BASE_LIST the TREE_PURPOSE is an
9316 access_* node, and the TREE_VALUE is the type of the base-class.
9317 Non-NULL TREE_TYPE indicates virtual inheritance. */
9320 xref_basetypes (tree ref
, tree base_list
)
9323 tree binfo
, base_binfo
;
9324 unsigned max_vbases
= 0; /* Maximum direct & indirect virtual bases. */
9325 unsigned max_bases
= 0; /* Maximum direct bases. */
9327 tree default_access
;
9328 tree igo_prev
; /* Track Inheritance Graph Order. */
9330 if (ref
== error_mark_node
)
9333 /* The base of a derived class is private by default, all others are
9335 default_access
= (TREE_CODE (ref
) == RECORD_TYPE
9336 && CLASSTYPE_DECLARED_CLASS (ref
)
9337 ? access_private_node
: access_public_node
);
9339 /* First, make sure that any templates in base-classes are
9340 instantiated. This ensures that if we call ourselves recursively
9341 we do not get confused about which classes are marked and which
9346 tree basetype
= TREE_VALUE (*basep
);
9348 if (!(processing_template_decl
&& uses_template_parms (basetype
))
9349 && !complete_type_or_else (basetype
, NULL
))
9350 /* An incomplete type. Remove it from the list. */
9351 *basep
= TREE_CHAIN (*basep
);
9355 if (TREE_TYPE (*basep
))
9357 if (CLASS_TYPE_P (basetype
))
9358 max_vbases
+= VEC_length (tree
, CLASSTYPE_VBASECLASSES (basetype
));
9359 basep
= &TREE_CHAIN (*basep
);
9363 TYPE_MARKED_P (ref
) = 1;
9365 /* The binfo slot should be empty, unless this is an (ill-formed)
9367 gcc_assert (!TYPE_BINFO (ref
) || TYPE_SIZE (ref
));
9368 gcc_assert (TYPE_MAIN_VARIANT (ref
) == ref
);
9370 binfo
= make_tree_binfo (max_bases
);
9372 TYPE_BINFO (ref
) = binfo
;
9373 BINFO_OFFSET (binfo
) = size_zero_node
;
9374 BINFO_TYPE (binfo
) = ref
;
9378 BINFO_BASE_ACCESSES (binfo
) = VEC_alloc (tree
, max_bases
);
9379 /* An aggregate cannot have baseclasses. */
9380 CLASSTYPE_NON_AGGREGATE (ref
) = 1;
9382 if (TREE_CODE (ref
) == UNION_TYPE
)
9383 error ("derived union %qT invalid", ref
);
9388 if (TYPE_FOR_JAVA (ref
))
9389 error ("Java class %qT cannot have multiple bases", ref
);
9394 CLASSTYPE_VBASECLASSES (ref
) = VEC_alloc (tree
, max_vbases
);
9396 if (TYPE_FOR_JAVA (ref
))
9397 error ("Java class %qT cannot have virtual bases", ref
);
9400 for (igo_prev
= binfo
; base_list
; base_list
= TREE_CHAIN (base_list
))
9402 tree access
= TREE_PURPOSE (base_list
);
9403 int via_virtual
= TREE_TYPE (base_list
) != NULL_TREE
;
9404 tree basetype
= TREE_VALUE (base_list
);
9406 if (access
== access_default_node
)
9407 access
= default_access
;
9409 if (TREE_CODE (basetype
) == TYPE_DECL
)
9410 basetype
= TREE_TYPE (basetype
);
9411 if (TREE_CODE (basetype
) != RECORD_TYPE
9412 && TREE_CODE (basetype
) != TYPENAME_TYPE
9413 && TREE_CODE (basetype
) != TEMPLATE_TYPE_PARM
9414 && TREE_CODE (basetype
) != BOUND_TEMPLATE_TEMPLATE_PARM
)
9416 error ("base type %qT fails to be a struct or class type",
9421 if (TYPE_FOR_JAVA (basetype
) && (current_lang_depth () == 0))
9422 TYPE_FOR_JAVA (ref
) = 1;
9424 base_binfo
= NULL_TREE
;
9425 if (CLASS_TYPE_P (basetype
) && !dependent_type_p (basetype
))
9427 base_binfo
= TYPE_BINFO (basetype
);
9428 /* The original basetype could have been a typedef'd type. */
9429 basetype
= BINFO_TYPE (base_binfo
);
9431 /* Inherit flags from the base. */
9432 TYPE_HAS_NEW_OPERATOR (ref
)
9433 |= TYPE_HAS_NEW_OPERATOR (basetype
);
9434 TYPE_HAS_ARRAY_NEW_OPERATOR (ref
)
9435 |= TYPE_HAS_ARRAY_NEW_OPERATOR (basetype
);
9436 TYPE_GETS_DELETE (ref
) |= TYPE_GETS_DELETE (basetype
);
9437 TYPE_HAS_CONVERSION (ref
) |= TYPE_HAS_CONVERSION (basetype
);
9438 CLASSTYPE_DIAMOND_SHAPED_P (ref
)
9439 |= CLASSTYPE_DIAMOND_SHAPED_P (basetype
);
9440 CLASSTYPE_REPEATED_BASE_P (ref
)
9441 |= CLASSTYPE_REPEATED_BASE_P (basetype
);
9444 /* We must do this test after we've seen through a typedef
9446 if (TYPE_MARKED_P (basetype
))
9448 if (basetype
== ref
)
9449 error ("recursive type %qT undefined", basetype
);
9451 error ("duplicate base type %qT invalid", basetype
);
9454 TYPE_MARKED_P (basetype
) = 1;
9456 base_binfo
= copy_binfo (base_binfo
, basetype
, ref
,
9457 &igo_prev
, via_virtual
);
9458 if (!BINFO_INHERITANCE_CHAIN (base_binfo
))
9459 BINFO_INHERITANCE_CHAIN (base_binfo
) = binfo
;
9461 BINFO_BASE_APPEND (binfo
, base_binfo
);
9462 BINFO_BASE_ACCESS_APPEND (binfo
, access
);
9465 if (VEC_space (tree
, CLASSTYPE_VBASECLASSES (ref
), 1))
9466 /* If we have space in the vbase vector, we must have shared at
9467 least one of them, and are therefore diamond shaped. */
9468 CLASSTYPE_DIAMOND_SHAPED_P (ref
) = 1;
9470 /* Unmark all the types. */
9471 for (i
= 0; BINFO_BASE_ITERATE (binfo
, i
, base_binfo
); i
++)
9472 TYPE_MARKED_P (BINFO_TYPE (base_binfo
)) = 0;
9473 TYPE_MARKED_P (ref
) = 0;
9475 /* Now see if we have a repeated base type. */
9476 if (!CLASSTYPE_REPEATED_BASE_P (ref
))
9478 for (base_binfo
= binfo
; base_binfo
;
9479 base_binfo
= TREE_CHAIN (base_binfo
))
9481 if (TYPE_MARKED_P (BINFO_TYPE (base_binfo
)))
9483 CLASSTYPE_REPEATED_BASE_P (ref
) = 1;
9486 TYPE_MARKED_P (BINFO_TYPE (base_binfo
)) = 1;
9488 for (base_binfo
= binfo
; base_binfo
;
9489 base_binfo
= TREE_CHAIN (base_binfo
))
9490 if (TYPE_MARKED_P (BINFO_TYPE (base_binfo
)))
9491 TYPE_MARKED_P (BINFO_TYPE (base_binfo
)) = 0;
9498 /* Begin compiling the definition of an enumeration type.
9500 Returns the type object, as yet incomplete.
9501 Also records info about it so that build_enumerator
9502 may be used to declare the individual values as they are read. */
9505 start_enum (tree name
)
9509 gcc_assert (TREE_CODE (name
) == IDENTIFIER_NODE
);
9511 /* If this is the real definition for a previous forward reference,
9512 fill in the contents in the same object that used to be the
9513 forward reference. */
9515 enumtype
= lookup_and_check_tag (enum_type
, name
,
9516 /*tag_scope=*/ts_current
,
9517 /*template_header_p=*/false);
9519 if (enumtype
!= NULL_TREE
&& TREE_CODE (enumtype
) == ENUMERAL_TYPE
)
9521 error ("multiple definition of %q#T", enumtype
);
9522 error ("%Jprevious definition here", TYPE_MAIN_DECL (enumtype
));
9523 /* Clear out TYPE_VALUES, and start again. */
9524 TYPE_VALUES (enumtype
) = NULL_TREE
;
9528 /* In case of error, make a dummy enum to allow parsing to
9530 if (enumtype
== error_mark_node
)
9531 name
= make_anon_name ();
9533 enumtype
= make_node (ENUMERAL_TYPE
);
9534 enumtype
= pushtag (name
, enumtype
, 0);
9540 /* After processing and defining all the values of an enumeration type,
9541 install their decls in the enumeration type and finish it off.
9542 ENUMTYPE is the type object and VALUES a list of name-value pairs. */
9545 finish_enum (tree enumtype
)
9554 bool use_short_enum
;
9558 integer_type_kind itk
;
9559 tree underlying_type
= NULL_TREE
;
9561 /* We built up the VALUES in reverse order. */
9562 TYPE_VALUES (enumtype
) = nreverse (TYPE_VALUES (enumtype
));
9564 /* For an enum defined in a template, just set the type of the values;
9565 all further processing is postponed until the template is
9566 instantiated. We need to set the type so that tsubst of a CONST_DECL
9568 if (processing_template_decl
)
9570 for (values
= TYPE_VALUES (enumtype
);
9572 values
= TREE_CHAIN (values
))
9573 TREE_TYPE (TREE_VALUE (values
)) = enumtype
;
9574 if (at_function_scope_p ())
9575 add_stmt (build_min (TAG_DEFN
, enumtype
));
9579 /* Determine the minimum and maximum values of the enumerators. */
9580 if (TYPE_VALUES (enumtype
))
9582 minnode
= maxnode
= NULL_TREE
;
9584 for (values
= TYPE_VALUES (enumtype
);
9586 values
= TREE_CHAIN (values
))
9588 decl
= TREE_VALUE (values
);
9590 /* [dcl.enum]: Following the closing brace of an enum-specifier,
9591 each enumerator has the type of its enumeration. Prior to the
9592 closing brace, the type of each enumerator is the type of its
9593 initializing value. */
9594 TREE_TYPE (decl
) = enumtype
;
9596 /* Update the minimum and maximum values, if appropriate. */
9597 value
= DECL_INITIAL (decl
);
9598 /* Figure out what the minimum and maximum values of the
9601 minnode
= maxnode
= value
;
9602 else if (tree_int_cst_lt (maxnode
, value
))
9604 else if (tree_int_cst_lt (value
, minnode
))
9611 If the enumerator-list is empty, the underlying type is as if
9612 the enumeration had a single enumerator with value 0. */
9613 minnode
= maxnode
= integer_zero_node
;
9615 /* Compute the number of bits require to represent all values of the
9616 enumeration. We must do this before the type of MINNODE and
9617 MAXNODE are transformed, since min_precision relies on the
9618 TREE_TYPE of the value it is passed. */
9619 unsignedp
= tree_int_cst_sgn (minnode
) >= 0;
9620 lowprec
= min_precision (minnode
, unsignedp
);
9621 highprec
= min_precision (maxnode
, unsignedp
);
9622 precision
= MAX (lowprec
, highprec
);
9624 /* Determine the underlying type of the enumeration.
9628 The underlying type of an enumeration is an integral type that
9629 can represent all the enumerator values defined in the
9630 enumeration. It is implementation-defined which integral type is
9631 used as the underlying type for an enumeration except that the
9632 underlying type shall not be larger than int unless the value of
9633 an enumerator cannot fit in an int or unsigned int.
9635 We use "int" or an "unsigned int" as the underlying type, even if
9636 a smaller integral type would work, unless the user has
9637 explicitly requested that we use the smallest possible type. The
9638 user can request that for all enumerations with a command line
9639 flag, or for just one enumeration with an attribute. */
9641 use_short_enum
= flag_short_enums
9642 || lookup_attribute ("packed", TYPE_ATTRIBUTES (enumtype
));
9644 for (itk
= (use_short_enum
? itk_char
: itk_int
);
9648 underlying_type
= integer_types
[itk
];
9649 if (TYPE_PRECISION (underlying_type
) >= precision
9650 && TYPE_UNSIGNED (underlying_type
) == unsignedp
)
9653 if (itk
== itk_none
)
9657 IF no integral type can represent all the enumerator values, the
9658 enumeration is ill-formed. */
9659 error ("no integral type can represent all of the enumerator values "
9660 "for %qT", enumtype
);
9661 precision
= TYPE_PRECISION (long_long_integer_type_node
);
9662 underlying_type
= integer_types
[itk_unsigned_long_long
];
9665 /* Compute the minium and maximum values for the type.
9669 For an enumeration where emin is the smallest enumerator and emax
9670 is the largest, the values of the enumeration are the values of the
9671 underlying type in the range bmin to bmax, where bmin and bmax are,
9672 respectively, the smallest and largest values of the smallest bit-
9673 field that can store emin and emax. */
9675 /* The middle-end currently assumes that types with TYPE_PRECISION
9676 narrower than their underlying type are suitably zero or sign
9677 extended to fill their mode. g++ doesn't make these guarantees.
9678 Until the middle-end can represent such paradoxical types, we
9679 set the TYPE_PRECISION to the width of the underlying type. */
9680 TYPE_PRECISION (enumtype
) = TYPE_PRECISION (underlying_type
);
9682 set_min_and_max_values_for_integral_type (enumtype
, precision
, unsignedp
);
9686 The value of sizeof() applied to an enumeration type, an object
9687 of an enumeration type, or an enumerator, is the value of sizeof()
9688 applied to the underlying type. */
9689 TYPE_SIZE (enumtype
) = TYPE_SIZE (underlying_type
);
9690 TYPE_SIZE_UNIT (enumtype
) = TYPE_SIZE_UNIT (underlying_type
);
9691 TYPE_MODE (enumtype
) = TYPE_MODE (underlying_type
);
9692 TYPE_ALIGN (enumtype
) = TYPE_ALIGN (underlying_type
);
9693 TYPE_USER_ALIGN (enumtype
) = TYPE_USER_ALIGN (underlying_type
);
9694 TYPE_UNSIGNED (enumtype
) = TYPE_UNSIGNED (underlying_type
);
9696 /* Convert each of the enumerators to the type of the underlying
9697 type of the enumeration. */
9698 for (values
= TYPE_VALUES (enumtype
); values
; values
= TREE_CHAIN (values
))
9700 decl
= TREE_VALUE (values
);
9701 value
= perform_implicit_conversion (underlying_type
,
9702 DECL_INITIAL (decl
));
9704 /* Do not clobber shared ints. */
9705 value
= copy_node (value
);
9707 TREE_TYPE (value
) = enumtype
;
9708 DECL_INITIAL (decl
) = value
;
9709 TREE_VALUE (values
) = value
;
9712 /* Fix up all variant types of this enum type. */
9713 for (t
= TYPE_MAIN_VARIANT (enumtype
); t
; t
= TYPE_NEXT_VARIANT (t
))
9715 TYPE_VALUES (t
) = TYPE_VALUES (enumtype
);
9716 TYPE_MIN_VALUE (t
) = TYPE_MIN_VALUE (enumtype
);
9717 TYPE_MAX_VALUE (t
) = TYPE_MAX_VALUE (enumtype
);
9718 TYPE_SIZE (t
) = TYPE_SIZE (enumtype
);
9719 TYPE_SIZE_UNIT (t
) = TYPE_SIZE_UNIT (enumtype
);
9720 TYPE_MODE (t
) = TYPE_MODE (enumtype
);
9721 TYPE_PRECISION (t
) = TYPE_PRECISION (enumtype
);
9722 TYPE_ALIGN (t
) = TYPE_ALIGN (enumtype
);
9723 TYPE_USER_ALIGN (t
) = TYPE_USER_ALIGN (enumtype
);
9724 TYPE_UNSIGNED (t
) = TYPE_UNSIGNED (enumtype
);
9727 /* Finish debugging output for this type. */
9728 rest_of_type_compilation (enumtype
, namespace_bindings_p ());
9731 /* Build and install a CONST_DECL for an enumeration constant of the
9732 enumeration type ENUMTYPE whose NAME and VALUE (if any) are provided.
9733 Assignment of sequential values by default is handled here. */
9736 build_enumerator (tree name
, tree value
, tree enumtype
)
9742 /* If the VALUE was erroneous, pretend it wasn't there; that will
9743 result in the enum being assigned the next value in sequence. */
9744 if (value
== error_mark_node
)
9747 /* Remove no-op casts from the value. */
9749 STRIP_TYPE_NOPS (value
);
9751 if (! processing_template_decl
)
9753 /* Validate and default VALUE. */
9754 if (value
!= NULL_TREE
)
9756 value
= integral_constant_value (value
);
9758 if (TREE_CODE (value
) == INTEGER_CST
)
9760 value
= perform_integral_promotions (value
);
9761 constant_expression_warning (value
);
9765 error ("enumerator value for %qD not integer constant", name
);
9770 /* Default based on previous value. */
9771 if (value
== NULL_TREE
)
9773 if (TYPE_VALUES (enumtype
))
9776 unsigned HOST_WIDE_INT lo
;
9780 /* The next value is the previous value plus one. We can
9781 safely assume that the previous value is an INTEGER_CST.
9782 add_double doesn't know the type of the target expression,
9783 so we must check with int_fits_type_p as well. */
9784 prev_value
= DECL_INITIAL (TREE_VALUE (TYPE_VALUES (enumtype
)));
9785 overflowed
= add_double (TREE_INT_CST_LOW (prev_value
),
9786 TREE_INT_CST_HIGH (prev_value
),
9788 value
= build_int_cst_wide (TREE_TYPE (prev_value
), lo
, hi
);
9789 overflowed
|= !int_fits_type_p (value
, TREE_TYPE (prev_value
));
9792 error ("overflow in enumeration values at %qD", name
);
9795 value
= integer_zero_node
;
9798 /* Remove no-op casts from the value. */
9799 STRIP_TYPE_NOPS (value
);
9802 /* C++ associates enums with global, function, or class declarations. */
9803 context
= current_scope ();
9805 /* Build the actual enumeration constant. Note that the enumeration
9806 constants have the type of their initializers until the
9807 enumeration is complete:
9811 Following the closing brace of an enum-specifier, each enumer-
9812 ator has the type of its enumeration. Prior to the closing
9813 brace, the type of each enumerator is the type of its
9816 In finish_enum we will reset the type. Of course, if we're
9817 processing a template, there may be no value. */
9818 type
= value
? TREE_TYPE (value
) : NULL_TREE
;
9820 if (context
&& context
== current_class_type
)
9821 /* This enum declaration is local to the class. We need the full
9822 lang_decl so that we can record DECL_CLASS_CONTEXT, for example. */
9823 decl
= build_lang_decl (CONST_DECL
, name
, type
);
9825 /* It's a global enum, or it's local to a function. (Note local to
9826 a function could mean local to a class method. */
9827 decl
= build_decl (CONST_DECL
, name
, type
);
9829 DECL_CONTEXT (decl
) = FROB_CONTEXT (context
);
9830 TREE_CONSTANT (decl
) = 1;
9831 TREE_INVARIANT (decl
) = 1;
9832 TREE_READONLY (decl
) = 1;
9833 DECL_INITIAL (decl
) = value
;
9835 if (context
&& context
== current_class_type
)
9836 /* In something like `struct S { enum E { i = 7 }; };' we put `i'
9837 on the TYPE_FIELDS list for `S'. (That's so that you can say
9838 things like `S::i' later.) */
9839 finish_member_declaration (decl
);
9843 /* Add this enumeration constant to the list for this type. */
9844 TYPE_VALUES (enumtype
) = tree_cons (name
, decl
, TYPE_VALUES (enumtype
));
9848 /* We're defining DECL. Make sure that it's type is OK. */
9851 check_function_type (tree decl
, tree current_function_parms
)
9853 tree fntype
= TREE_TYPE (decl
);
9854 tree return_type
= complete_type (TREE_TYPE (fntype
));
9856 /* In a function definition, arg types must be complete. */
9857 require_complete_types_for_parms (current_function_parms
);
9859 if (dependent_type_p (return_type
))
9861 if (!COMPLETE_OR_VOID_TYPE_P (return_type
))
9863 error ("return type %q#T is incomplete", TREE_TYPE (fntype
));
9865 /* Make it return void instead, but don't change the
9866 type of the DECL_RESULT, in case we have a named return value. */
9867 if (TREE_CODE (fntype
) == METHOD_TYPE
)
9869 tree ctype
= TREE_TYPE (TREE_VALUE (TYPE_ARG_TYPES (fntype
)));
9871 = build_method_type_directly (ctype
,
9873 FUNCTION_ARG_CHAIN (decl
));
9877 = build_function_type (void_type_node
,
9878 TYPE_ARG_TYPES (TREE_TYPE (decl
)));
9880 = build_exception_variant (fntype
,
9881 TYPE_RAISES_EXCEPTIONS (fntype
));
9884 abstract_virtuals_error (decl
, TREE_TYPE (fntype
));
9887 /* Create the FUNCTION_DECL for a function definition.
9888 DECLSPECS and DECLARATOR are the parts of the declaration;
9889 they describe the function's name and the type it returns,
9890 but twisted together in a fashion that parallels the syntax of C.
9892 FLAGS is a bitwise or of SF_PRE_PARSED (indicating that the
9893 DECLARATOR is really the DECL for the function we are about to
9894 process and that DECLSPECS should be ignored), SF_INCLASS_INLINE
9895 indicating that the function is an inline defined in-class.
9897 This function creates a binding context for the function body
9898 as well as setting up the FUNCTION_DECL in current_function_decl.
9900 For C++, we must first check whether that datum makes any sense.
9901 For example, "class A local_a(1,2);" means that variable local_a
9902 is an aggregate of type A, which should have a constructor
9903 applied to it with the argument list [1, 2]. */
9906 start_preparsed_function (tree decl1
, tree attrs
, int flags
)
9908 tree ctype
= NULL_TREE
;
9911 int doing_friend
= 0;
9912 struct cp_binding_level
*bl
;
9913 tree current_function_parms
;
9914 struct c_fileinfo
*finfo
= get_fileinfo (lbasename (input_filename
));
9917 gcc_assert (TREE_CODE (TREE_VALUE (void_list_node
)) == VOID_TYPE
);
9918 gcc_assert (TREE_CHAIN (void_list_node
) == NULL_TREE
);
9920 fntype
= TREE_TYPE (decl1
);
9921 if (TREE_CODE (fntype
) == METHOD_TYPE
)
9922 ctype
= TYPE_METHOD_BASETYPE (fntype
);
9924 /* ISO C++ 11.4/5. A friend function defined in a class is in
9925 the (lexical) scope of the class in which it is defined. */
9926 if (!ctype
&& DECL_FRIEND_P (decl1
))
9928 ctype
= DECL_FRIEND_CONTEXT (decl1
);
9930 /* CTYPE could be null here if we're dealing with a template;
9931 for example, `inline friend float foo()' inside a template
9932 will have no CTYPE set. */
9933 if (ctype
&& TREE_CODE (ctype
) != RECORD_TYPE
)
9939 if (DECL_DECLARED_INLINE_P (decl1
)
9940 && lookup_attribute ("noinline", attrs
))
9941 warning ("%Jinline function %qD given attribute noinline", decl1
, decl1
);
9943 if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (decl1
))
9944 /* This is a constructor, we must ensure that any default args
9945 introduced by this definition are propagated to the clones
9946 now. The clones are used directly in overload resolution. */
9947 adjust_clone_args (decl1
);
9949 /* Sometimes we don't notice that a function is a static member, and
9950 build a METHOD_TYPE for it. Fix that up now. */
9951 if (ctype
!= NULL_TREE
&& DECL_STATIC_FUNCTION_P (decl1
)
9952 && TREE_CODE (TREE_TYPE (decl1
)) == METHOD_TYPE
)
9954 revert_static_member_fn (decl1
);
9958 /* Set up current_class_type, and enter the scope of the class, if
9961 push_nested_class (ctype
);
9962 else if (DECL_STATIC_FUNCTION_P (decl1
))
9963 push_nested_class (DECL_CONTEXT (decl1
));
9965 /* Now that we have entered the scope of the class, we must restore
9966 the bindings for any template parameters surrounding DECL1, if it
9967 is an inline member template. (Order is important; consider the
9968 case where a template parameter has the same name as a field of
9969 the class.) It is not until after this point that
9970 PROCESSING_TEMPLATE_DECL is guaranteed to be set up correctly. */
9971 if (flags
& SF_INCLASS_INLINE
)
9972 maybe_begin_member_template_processing (decl1
);
9974 /* Effective C++ rule 15. */
9976 && DECL_OVERLOADED_OPERATOR_P (decl1
) == NOP_EXPR
9977 && TREE_CODE (TREE_TYPE (fntype
)) == VOID_TYPE
)
9978 warning ("%<operator=%> should return a reference to %<*this%>");
9980 /* Make the init_value nonzero so pushdecl knows this is not tentative.
9981 error_mark_node is replaced below (in poplevel) with the BLOCK. */
9982 if (!DECL_INITIAL (decl1
))
9983 DECL_INITIAL (decl1
) = error_mark_node
;
9985 /* This function exists in static storage.
9986 (This does not mean `static' in the C sense!) */
9987 TREE_STATIC (decl1
) = 1;
9989 /* We must call push_template_decl after current_class_type is set
9990 up. (If we are processing inline definitions after exiting a
9991 class scope, current_class_type will be NULL_TREE until set above
9992 by push_nested_class.) */
9993 if (processing_template_decl
)
9994 decl1
= push_template_decl (decl1
);
9996 /* We are now in the scope of the function being defined. */
9997 current_function_decl
= decl1
;
9999 /* Save the parm names or decls from this function's declarator
10000 where store_parm_decls will find them. */
10001 current_function_parms
= DECL_ARGUMENTS (decl1
);
10003 /* Make sure the parameter and return types are reasonable. When
10004 you declare a function, these types can be incomplete, but they
10005 must be complete when you define the function. */
10006 check_function_type (decl1
, current_function_parms
);
10008 /* Build the return declaration for the function. */
10009 restype
= TREE_TYPE (fntype
);
10010 /* Promote the value to int before returning it. */
10011 if (c_promoting_integer_type_p (restype
))
10012 restype
= type_promotes_to (restype
);
10013 if (DECL_RESULT (decl1
) == NULL_TREE
)
10017 resdecl
= build_decl (RESULT_DECL
, 0, TYPE_MAIN_VARIANT (restype
));
10018 DECL_ARTIFICIAL (resdecl
) = 1;
10019 DECL_IGNORED_P (resdecl
) = 1;
10020 DECL_RESULT (decl1
) = resdecl
;
10022 cp_apply_type_quals_to_decl (cp_type_quals (restype
), resdecl
);
10025 /* Initialize RTL machinery. We cannot do this until
10026 CURRENT_FUNCTION_DECL and DECL_RESULT are set up. We do this
10027 even when processing a template; this is how we get
10028 CFUN set up, and our per-function variables initialized.
10029 FIXME factor out the non-RTL stuff. */
10030 bl
= current_binding_level
;
10031 allocate_struct_function (decl1
);
10032 current_binding_level
= bl
;
10034 /* Even though we're inside a function body, we still don't want to
10035 call expand_expr to calculate the size of a variable-sized array.
10036 We haven't necessarily assigned RTL to all variables yet, so it's
10037 not safe to try to expand expressions involving them. */
10038 cfun
->x_dont_save_pending_sizes_p
= 1;
10040 /* Start the statement-tree, start the tree now. */
10041 DECL_SAVED_TREE (decl1
) = push_stmt_list ();
10043 /* Let the user know we're compiling this function. */
10044 announce_function (decl1
);
10046 /* Record the decl so that the function name is defined.
10047 If we already have a decl for this name, and it is a FUNCTION_DECL,
10048 use the old decl. */
10049 if (!processing_template_decl
&& !(flags
& SF_PRE_PARSED
))
10051 /* A specialization is not used to guide overload resolution. */
10052 if (!DECL_FUNCTION_MEMBER_P (decl1
)
10053 && !(DECL_USE_TEMPLATE (decl1
) &&
10054 PRIMARY_TEMPLATE_P (DECL_TI_TEMPLATE (decl1
))))
10056 tree olddecl
= pushdecl (decl1
);
10058 if (olddecl
== error_mark_node
)
10059 /* If something went wrong when registering the declaration,
10060 use DECL1; we have to have a FUNCTION_DECL to use when
10061 parsing the body of the function. */
10064 /* Otherwise, OLDDECL is either a previous declaration of
10065 the same function or DECL1 itself. */
10070 /* We need to set the DECL_CONTEXT. */
10071 if (!DECL_CONTEXT (decl1
) && DECL_TEMPLATE_INFO (decl1
))
10072 DECL_CONTEXT (decl1
) = DECL_CONTEXT (DECL_TI_TEMPLATE (decl1
));
10073 /* And make sure we have enough default args. */
10074 check_default_args (decl1
);
10076 fntype
= TREE_TYPE (decl1
);
10079 /* Determine the ELF visibility attribute for the function. We must
10080 not do this before calling "pushdecl", as we must allow
10081 "duplicate_decls" to merge any attributes appropriately. */
10082 if (!DECL_CLONED_FUNCTION_P (decl1
))
10083 determine_visibility (decl1
);
10085 /* Reset these in case the call to pushdecl changed them. */
10086 current_function_decl
= decl1
;
10087 cfun
->decl
= decl1
;
10089 /* If we are (erroneously) defining a function that we have already
10090 defined before, wipe out what we knew before. */
10091 if (!DECL_PENDING_INLINE_P (decl1
))
10092 DECL_SAVED_FUNCTION_DATA (decl1
) = NULL
;
10094 if (ctype
&& !doing_friend
&& !DECL_STATIC_FUNCTION_P (decl1
))
10096 /* We know that this was set up by `grokclassfn'. We do not
10097 wait until `store_parm_decls', since evil parse errors may
10098 never get us to that point. Here we keep the consistency
10099 between `current_class_type' and `current_class_ptr'. */
10100 tree t
= DECL_ARGUMENTS (decl1
);
10102 gcc_assert (t
!= NULL_TREE
&& TREE_CODE (t
) == PARM_DECL
);
10103 gcc_assert (TREE_CODE (TREE_TYPE (t
)) == POINTER_TYPE
);
10105 cp_function_chain
->x_current_class_ref
10106 = build_indirect_ref (t
, NULL
);
10107 cp_function_chain
->x_current_class_ptr
= t
;
10109 /* Constructors and destructors need to know whether they're "in
10110 charge" of initializing virtual base classes. */
10111 t
= TREE_CHAIN (t
);
10112 if (DECL_HAS_IN_CHARGE_PARM_P (decl1
))
10114 current_in_charge_parm
= t
;
10115 t
= TREE_CHAIN (t
);
10117 if (DECL_HAS_VTT_PARM_P (decl1
))
10119 gcc_assert (DECL_NAME (t
) == vtt_parm_identifier
);
10120 current_vtt_parm
= t
;
10124 if (DECL_INTERFACE_KNOWN (decl1
))
10126 tree ctx
= decl_function_context (decl1
);
10128 if (DECL_NOT_REALLY_EXTERN (decl1
))
10129 DECL_EXTERNAL (decl1
) = 0;
10131 if (ctx
!= NULL_TREE
&& DECL_DECLARED_INLINE_P (ctx
)
10132 && TREE_PUBLIC (ctx
))
10133 /* This is a function in a local class in an extern inline
10135 comdat_linkage (decl1
);
10137 /* If this function belongs to an interface, it is public.
10138 If it belongs to someone else's interface, it is also external.
10139 This only affects inlines and template instantiations. */
10140 else if (finfo
->interface_unknown
== 0
10141 && ! DECL_TEMPLATE_INSTANTIATION (decl1
))
10143 if (DECL_DECLARED_INLINE_P (decl1
)
10144 || DECL_TEMPLATE_INSTANTIATION (decl1
)
10145 || processing_template_decl
)
10147 DECL_EXTERNAL (decl1
)
10148 = (finfo
->interface_only
10149 || (DECL_DECLARED_INLINE_P (decl1
)
10150 && ! flag_implement_inlines
10151 && !DECL_VINDEX (decl1
)));
10153 /* For WIN32 we also want to put these in linkonce sections. */
10154 maybe_make_one_only (decl1
);
10157 DECL_EXTERNAL (decl1
) = 0;
10158 DECL_NOT_REALLY_EXTERN (decl1
) = 0;
10159 DECL_INTERFACE_KNOWN (decl1
) = 1;
10160 /* If this function is in an interface implemented in this file,
10161 make sure that the backend knows to emit this function
10163 if (!DECL_EXTERNAL (decl1
))
10164 mark_needed (decl1
);
10166 else if (finfo
->interface_unknown
&& finfo
->interface_only
10167 && ! DECL_TEMPLATE_INSTANTIATION (decl1
))
10169 /* If MULTIPLE_SYMBOL_SPACES is defined and we saw a #pragma
10170 interface, we will have both finfo->interface_unknown and
10171 finfo->interface_only set. In that case, we don't want to
10172 use the normal heuristics because someone will supply a
10173 #pragma implementation elsewhere, and deducing it here would
10174 produce a conflict. */
10175 comdat_linkage (decl1
);
10176 DECL_EXTERNAL (decl1
) = 0;
10177 DECL_INTERFACE_KNOWN (decl1
) = 1;
10178 DECL_DEFER_OUTPUT (decl1
) = 1;
10182 /* This is a definition, not a reference.
10183 So clear DECL_EXTERNAL. */
10184 DECL_EXTERNAL (decl1
) = 0;
10186 if ((DECL_DECLARED_INLINE_P (decl1
)
10187 || DECL_TEMPLATE_INSTANTIATION (decl1
))
10188 && ! DECL_INTERFACE_KNOWN (decl1
)
10189 /* Don't try to defer nested functions for now. */
10190 && ! decl_function_context (decl1
))
10191 DECL_DEFER_OUTPUT (decl1
) = 1;
10193 DECL_INTERFACE_KNOWN (decl1
) = 1;
10196 begin_scope (sk_function_parms
, decl1
);
10200 if (DECL_DESTRUCTOR_P (decl1
)
10201 || (DECL_CONSTRUCTOR_P (decl1
)
10202 && targetm
.cxx
.cdtor_returns_this ()))
10204 cdtor_label
= build_decl (LABEL_DECL
, NULL_TREE
, NULL_TREE
);
10205 DECL_CONTEXT (cdtor_label
) = current_function_decl
;
10208 start_fname_decls ();
10210 store_parm_decls (current_function_parms
);
10214 /* Like start_preparsed_function, except that instead of a
10215 FUNCTION_DECL, this function takes DECLSPECS and DECLARATOR.
10217 Returns 1 on success. If the DECLARATOR is not suitable for a function
10218 (it defines a datum instead), we return 0, which tells
10219 yyparse to report a parse error. */
10222 start_function (cp_decl_specifier_seq
*declspecs
,
10223 const cp_declarator
*declarator
,
10228 if (have_extern_spec
)
10230 declspecs
->storage_class
= sc_extern
;
10231 /* This should only be done once on the outermost decl. */
10232 have_extern_spec
= false;
10235 decl1
= grokdeclarator (declarator
, declspecs
, FUNCDEF
, 1, &attrs
);
10236 /* If the declarator is not suitable for a function definition,
10237 cause a syntax error. */
10238 if (decl1
== NULL_TREE
|| TREE_CODE (decl1
) != FUNCTION_DECL
)
10241 /* If #pragma weak was used, mark the decl weak now. */
10242 if (global_scope_p (current_binding_level
))
10243 maybe_apply_pragma_weak (decl1
);
10245 if (DECL_MAIN_P (decl1
))
10246 /* main must return int. grokfndecl should have corrected it
10247 (and issued a diagnostic) if the user got it wrong. */
10248 gcc_assert (same_type_p (TREE_TYPE (TREE_TYPE (decl1
)),
10249 integer_type_node
));
10251 start_preparsed_function (decl1
, attrs
, /*flags=*/SF_DEFAULT
);
10256 /* Store the parameter declarations into the current function declaration.
10257 This is called after parsing the parameter declarations, before
10258 digesting the body of the function.
10260 Also install to binding contour return value identifier, if any. */
10263 store_parm_decls (tree current_function_parms
)
10265 tree fndecl
= current_function_decl
;
10268 /* This is a chain of any other decls that came in among the parm
10269 declarations. If a parm is declared with enum {foo, bar} x;
10270 then CONST_DECLs for foo and bar are put here. */
10271 tree nonparms
= NULL_TREE
;
10273 if (current_function_parms
)
10275 /* This case is when the function was defined with an ANSI prototype.
10276 The parms already have decls, so we need not do anything here
10277 except record them as in effect
10278 and complain if any redundant old-style parm decls were written. */
10280 tree specparms
= current_function_parms
;
10283 /* Must clear this because it might contain TYPE_DECLs declared
10285 current_binding_level
->names
= NULL
;
10287 /* If we're doing semantic analysis, then we'll call pushdecl
10288 for each of these. We must do them in reverse order so that
10289 they end in the correct forward order. */
10290 specparms
= nreverse (specparms
);
10292 for (parm
= specparms
; parm
; parm
= next
)
10294 next
= TREE_CHAIN (parm
);
10295 if (TREE_CODE (parm
) == PARM_DECL
)
10297 if (DECL_NAME (parm
) == NULL_TREE
10298 || TREE_CODE (parm
) != VOID_TYPE
)
10301 error ("parameter %qD declared void", parm
);
10305 /* If we find an enum constant or a type tag,
10306 put it aside for the moment. */
10307 TREE_CHAIN (parm
) = NULL_TREE
;
10308 nonparms
= chainon (nonparms
, parm
);
10312 /* Get the decls in their original chain order and record in the
10313 function. This is all and only the PARM_DECLs that were
10314 pushed into scope by the loop above. */
10315 DECL_ARGUMENTS (fndecl
) = getdecls ();
10318 DECL_ARGUMENTS (fndecl
) = NULL_TREE
;
10320 /* Now store the final chain of decls for the arguments
10321 as the decl-chain of the current lexical scope.
10322 Put the enumerators in as well, at the front so that
10323 DECL_ARGUMENTS is not modified. */
10324 current_binding_level
->names
= chainon (nonparms
, DECL_ARGUMENTS (fndecl
));
10326 /* For a cloned function, we've already got all the code we need;
10327 there's no need to add any extra bits. */
10328 if (!DECL_CLONED_FUNCTION_P (fndecl
))
10330 /* Do the starting of the exception specifications, if we have any. */
10331 if (flag_exceptions
&& !processing_template_decl
10332 && flag_enforce_eh_specs
10333 && TYPE_RAISES_EXCEPTIONS (TREE_TYPE (current_function_decl
)))
10334 current_eh_spec_block
= begin_eh_spec_block ();
10339 /* We have finished doing semantic analysis on DECL, but have not yet
10340 generated RTL for its body. Save away our current state, so that
10341 when we want to generate RTL later we know what to do. */
10344 save_function_data (tree decl
)
10346 struct language_function
*f
;
10348 /* Save the language-specific per-function data so that we can
10349 get it back when we really expand this function. */
10350 gcc_assert (!DECL_PENDING_INLINE_P (decl
));
10353 f
= GGC_NEW (struct language_function
);
10354 memcpy (f
, cp_function_chain
, sizeof (struct language_function
));
10355 DECL_SAVED_FUNCTION_DATA (decl
) = f
;
10357 /* Clear out the bits we don't need. */
10358 f
->base
.x_stmt_tree
.x_cur_stmt_list
= NULL_TREE
;
10359 f
->x_named_label_uses
= NULL
;
10360 f
->bindings
= NULL
;
10361 f
->x_local_names
= NULL
;
10365 /* Set the return value of the constructor (if present). */
10368 finish_constructor_body (void)
10373 if (targetm
.cxx
.cdtor_returns_this ())
10375 /* Any return from a constructor will end up here. */
10376 add_stmt (build_stmt (LABEL_EXPR
, cdtor_label
));
10378 val
= DECL_ARGUMENTS (current_function_decl
);
10379 val
= build2 (MODIFY_EXPR
, TREE_TYPE (val
),
10380 DECL_RESULT (current_function_decl
), val
);
10381 /* Return the address of the object. */
10382 exprstmt
= build_stmt (RETURN_EXPR
, val
);
10383 add_stmt (exprstmt
);
10387 /* Do all the processing for the beginning of a destructor; set up the
10388 vtable pointers and cleanups for bases and members. */
10391 begin_destructor_body (void)
10394 tree compound_stmt
;
10396 /* If the dtor is empty, and we know there is not any possible
10397 way we could use any vtable entries, before they are possibly
10398 set by a base class dtor, we don't have to setup the vtables,
10399 as we know that any base class dtor will set up any vtables
10400 it needs. We avoid MI, because one base class dtor can do a
10401 virtual dispatch to an overridden function that would need to
10402 have a non-related vtable set up, we cannot avoid setting up
10403 vtables in that case. We could change this to see if there
10404 is just one vtable.
10406 ??? In the destructor for a class, the vtables are set
10407 appropriately for that class. There will be no non-related
10408 vtables. jason 2001-12-11. */
10409 if_stmt
= begin_if_stmt ();
10411 /* If it is not safe to avoid setting up the vtables, then
10412 someone will change the condition to be boolean_true_node.
10413 (Actually, for now, we do not have code to set the condition
10414 appropriately, so we just assume that we always need to
10415 initialize the vtables.) */
10416 finish_if_stmt_cond (boolean_true_node
, if_stmt
);
10418 compound_stmt
= begin_compound_stmt (0);
10420 /* Make all virtual function table pointers in non-virtual base
10421 classes point to CURRENT_CLASS_TYPE's virtual function
10423 initialize_vtbl_ptrs (current_class_ptr
);
10425 finish_compound_stmt (compound_stmt
);
10426 finish_then_clause (if_stmt
);
10427 finish_if_stmt (if_stmt
);
10429 /* And insert cleanups for our bases and members so that they
10430 will be properly destroyed if we throw. */
10431 push_base_cleanups ();
10434 /* At the end of every destructor we generate code to delete the object if
10435 necessary. Do that now. */
10438 finish_destructor_body (void)
10442 /* Any return from a destructor will end up here; that way all base
10443 and member cleanups will be run when the function returns. */
10444 add_stmt (build_stmt (LABEL_EXPR
, cdtor_label
));
10446 /* In a virtual destructor, we must call delete. */
10447 if (DECL_VIRTUAL_P (current_function_decl
))
10450 tree virtual_size
= cxx_sizeof (current_class_type
);
10454 At the point of definition of a virtual destructor (including
10455 an implicit definition), non-placement operator delete shall
10456 be looked up in the scope of the destructor's class and if
10457 found shall be accessible and unambiguous. */
10458 exprstmt
= build_op_delete_call
10459 (DELETE_EXPR
, current_class_ptr
, virtual_size
,
10460 /*global_p=*/false, NULL_TREE
);
10462 if_stmt
= begin_if_stmt ();
10463 finish_if_stmt_cond (build2 (BIT_AND_EXPR
, integer_type_node
,
10464 current_in_charge_parm
,
10467 finish_expr_stmt (exprstmt
);
10468 finish_then_clause (if_stmt
);
10469 finish_if_stmt (if_stmt
);
10472 if (targetm
.cxx
.cdtor_returns_this ())
10476 val
= DECL_ARGUMENTS (current_function_decl
);
10477 val
= build2 (MODIFY_EXPR
, TREE_TYPE (val
),
10478 DECL_RESULT (current_function_decl
), val
);
10479 /* Return the address of the object. */
10480 exprstmt
= build_stmt (RETURN_EXPR
, val
);
10481 add_stmt (exprstmt
);
10485 /* Do the necessary processing for the beginning of a function body, which
10486 in this case includes member-initializers, but not the catch clauses of
10487 a function-try-block. Currently, this means opening a binding level
10488 for the member-initializers (in a ctor) and member cleanups (in a dtor).
10489 In other functions, this isn't necessary, but it doesn't hurt. */
10492 begin_function_body (void)
10496 if (processing_template_decl
)
10497 /* Do nothing now. */;
10499 /* Always keep the BLOCK node associated with the outermost pair of
10500 curly braces of a function. These are needed for correct
10501 operation of dwarfout.c. */
10502 keep_next_level (true);
10504 stmt
= begin_compound_stmt (BCS_FN_BODY
);
10506 if (processing_template_decl
)
10507 /* Do nothing now. */;
10508 else if (DECL_DESTRUCTOR_P (current_function_decl
))
10509 begin_destructor_body ();
10514 /* Do the processing for the end of a function body. Currently, this means
10515 closing out the cleanups for fully-constructed bases and members, and in
10516 the case of the destructor, deleting the object if desired. Again, this
10517 is only meaningful for [cd]tors, since they are the only functions where
10518 there is a significant distinction between the main body and any
10519 function catch clauses. Handling, say, main() return semantics here
10520 would be wrong, as flowing off the end of a function catch clause for
10521 main() would also need to return 0. */
10524 finish_function_body (tree compstmt
)
10526 /* Close the block. */
10527 finish_compound_stmt (compstmt
);
10529 if (processing_template_decl
)
10530 /* Do nothing now. */;
10531 else if (DECL_CONSTRUCTOR_P (current_function_decl
))
10532 finish_constructor_body ();
10533 else if (DECL_DESTRUCTOR_P (current_function_decl
))
10534 finish_destructor_body ();
10537 /* Finish up a function declaration and compile that function
10538 all the way to assembler language output. The free the storage
10539 for the function definition.
10541 FLAGS is a bitwise or of the following values:
10543 We just finished processing the body of an in-class inline
10544 function definition. (This processing will have taken place
10545 after the class definition is complete.) */
10548 finish_function (int flags
)
10550 tree fndecl
= current_function_decl
;
10551 tree fntype
, ctype
= NULL_TREE
;
10552 int inclass_inline
= (flags
& 2) != 0;
10555 /* When we get some parse errors, we can end up without a
10556 current_function_decl, so cope. */
10557 if (fndecl
== NULL_TREE
)
10558 return error_mark_node
;
10560 if (DECL_NONSTATIC_MEMBER_FUNCTION_P (fndecl
)
10561 && DECL_VIRTUAL_P (fndecl
)
10562 && !processing_template_decl
)
10564 tree fnclass
= DECL_CONTEXT (fndecl
);
10565 if (fndecl
== CLASSTYPE_KEY_METHOD (fnclass
))
10566 keyed_classes
= tree_cons (NULL_TREE
, fnclass
, keyed_classes
);
10569 nested
= function_depth
> 1;
10570 fntype
= TREE_TYPE (fndecl
);
10572 /* TREE_READONLY (fndecl) = 1;
10573 This caused &foo to be of type ptr-to-const-function
10574 which then got a warning when stored in a ptr-to-function variable. */
10576 gcc_assert (building_stmt_tree ());
10578 /* For a cloned function, we've already got all the code we need;
10579 there's no need to add any extra bits. */
10580 if (!DECL_CLONED_FUNCTION_P (fndecl
))
10582 if (DECL_MAIN_P (current_function_decl
))
10586 /* Make it so that `main' always returns 0 by default (or
10589 stmt
= finish_return_stmt (integer_one_node
);
10591 stmt
= finish_return_stmt (integer_zero_node
);
10593 /* Hack. We don't want the middle-end to warn that this
10594 return is unreachable, so put the statement on the
10596 annotate_with_file_line (stmt
, input_filename
, 0);
10599 /* Finish dealing with exception specifiers. */
10600 if (flag_exceptions
&& !processing_template_decl
10601 && flag_enforce_eh_specs
10602 && TYPE_RAISES_EXCEPTIONS (TREE_TYPE (current_function_decl
)))
10603 finish_eh_spec_block (TYPE_RAISES_EXCEPTIONS
10604 (TREE_TYPE (current_function_decl
)),
10605 current_eh_spec_block
);
10608 /* If we're saving up tree structure, tie off the function now. */
10609 DECL_SAVED_TREE (fndecl
) = pop_stmt_list (DECL_SAVED_TREE (fndecl
));
10611 finish_fname_decls ();
10613 /* If this function can't throw any exceptions, remember that. */
10614 if (!processing_template_decl
10615 && !cp_function_chain
->can_throw
10616 && !flag_non_call_exceptions
)
10617 TREE_NOTHROW (fndecl
) = 1;
10619 /* This must come after expand_function_end because cleanups might
10620 have declarations (from inline functions) that need to go into
10621 this function's blocks. */
10623 /* If the current binding level isn't the outermost binding level
10624 for this function, either there is a bug, or we have experienced
10625 syntax errors and the statement tree is malformed. */
10626 if (current_binding_level
->kind
!= sk_function_parms
)
10628 /* Make sure we have already experienced errors. */
10629 gcc_assert (errorcount
);
10631 /* Throw away the broken statement tree and extra binding
10633 DECL_SAVED_TREE (fndecl
) = alloc_stmt_list ();
10635 while (current_binding_level
->kind
!= sk_function_parms
)
10637 if (current_binding_level
->kind
== sk_class
)
10638 pop_nested_class ();
10640 poplevel (0, 0, 0);
10643 poplevel (1, 0, 1);
10645 /* Statements should always be full-expressions at the outermost set
10646 of curly braces for a function. */
10647 gcc_assert (stmts_are_full_exprs_p ());
10649 /* Set up the named return value optimization, if we can. Candidate
10650 variables are selected in check_return_value. */
10651 if (current_function_return_value
)
10653 tree r
= current_function_return_value
;
10656 if (r
!= error_mark_node
10657 /* This is only worth doing for fns that return in memory--and
10658 simpler, since we don't have to worry about promoted modes. */
10659 && aggregate_value_p (TREE_TYPE (TREE_TYPE (fndecl
)), fndecl
)
10660 /* Only allow this for variables declared in the outer scope of
10661 the function so we know that their lifetime always ends with a
10662 return; see g++.dg/opt/nrv6.C. We could be more flexible if
10663 we were to do this optimization in tree-ssa. */
10664 && (outer
= BLOCK_SUBBLOCKS (DECL_INITIAL (fndecl
)))
10665 /* Skip the artificial function body block. */
10666 && (outer
= BLOCK_SUBBLOCKS (outer
))
10667 && chain_member (r
, BLOCK_VARS (outer
)))
10668 finalize_nrv (&DECL_SAVED_TREE (fndecl
), r
, DECL_RESULT (fndecl
));
10670 current_function_return_value
= NULL_TREE
;
10673 /* Remember that we were in class scope. */
10674 if (current_class_name
)
10675 ctype
= current_class_type
;
10677 /* Must mark the RESULT_DECL as being in this function. */
10678 DECL_CONTEXT (DECL_RESULT (fndecl
)) = fndecl
;
10680 /* Set the BLOCK_SUPERCONTEXT of the outermost function scope to point
10681 to the FUNCTION_DECL node itself. */
10682 BLOCK_SUPERCONTEXT (DECL_INITIAL (fndecl
)) = fndecl
;
10684 /* Save away current state, if appropriate. */
10685 if (!processing_template_decl
)
10686 save_function_data (fndecl
);
10688 /* Complain if there's just no return statement. */
10689 if (warn_return_type
10690 && TREE_CODE (TREE_TYPE (fntype
)) != VOID_TYPE
10691 && !dependent_type_p (TREE_TYPE (fntype
))
10692 && !current_function_returns_value
&& !current_function_returns_null
10693 /* Don't complain if we abort or throw. */
10694 && !current_function_returns_abnormally
10695 && !DECL_NAME (DECL_RESULT (fndecl
))
10696 /* Normally, with -Wreturn-type, flow will complain. Unless we're an
10697 inline function, as we might never be compiled separately. */
10698 && (DECL_INLINE (fndecl
) || processing_template_decl
)
10699 /* Structor return values (if any) are set by the compiler. */
10700 && !DECL_CONSTRUCTOR_P (fndecl
)
10701 && !DECL_DESTRUCTOR_P (fndecl
))
10702 warning ("no return statement in function returning non-void");
10704 /* Store the end of the function, so that we get good line number
10705 info for the epilogue. */
10706 cfun
->function_end_locus
= input_location
;
10708 /* Genericize before inlining. */
10709 if (!processing_template_decl
)
10711 struct language_function
*f
= DECL_SAVED_FUNCTION_DATA (fndecl
);
10712 cp_genericize (fndecl
);
10713 /* Clear out the bits we don't need. */
10714 f
->x_current_class_ptr
= NULL
;
10715 f
->x_current_class_ref
= NULL
;
10716 f
->x_eh_spec_block
= NULL
;
10717 f
->x_in_charge_parm
= NULL
;
10718 f
->x_vtt_parm
= NULL
;
10719 f
->x_return_value
= NULL
;
10720 f
->bindings
= NULL
;
10722 /* Handle attribute((warn_unused_result)). Relies on gimple input. */
10723 c_warn_unused_result (&DECL_SAVED_TREE (fndecl
));
10725 /* Clear out the bits we don't need. */
10726 local_names
= NULL
;
10727 named_label_uses
= NULL
;
10729 /* We're leaving the context of this function, so zap cfun. It's still in
10730 DECL_STRUCT_FUNCTION, and we'll restore it in tree_rest_of_compilation. */
10732 current_function_decl
= NULL
;
10734 /* If this is an in-class inline definition, we may have to pop the
10735 bindings for the template parameters that we added in
10736 maybe_begin_member_template_processing when start_function was
10738 if (inclass_inline
)
10739 maybe_end_member_template_processing ();
10741 /* Leave the scope of the class. */
10743 pop_nested_class ();
10749 /* Let the error reporting routines know that we're outside a
10750 function. For a nested function, this value is used in
10751 cxx_pop_function_context and then reset via pop_function_context. */
10752 current_function_decl
= NULL_TREE
;
10757 /* Create the FUNCTION_DECL for a function definition.
10758 DECLSPECS and DECLARATOR are the parts of the declaration;
10759 they describe the return type and the name of the function,
10760 but twisted together in a fashion that parallels the syntax of C.
10762 This function creates a binding context for the function body
10763 as well as setting up the FUNCTION_DECL in current_function_decl.
10765 Returns a FUNCTION_DECL on success.
10767 If the DECLARATOR is not suitable for a function (it defines a datum
10768 instead), we return 0, which tells yyparse to report a parse error.
10770 May return void_type_node indicating that this method is actually
10771 a friend. See grokfield for more details.
10773 Came here with a `.pushlevel' .
10775 DO NOT MAKE ANY CHANGES TO THIS CODE WITHOUT MAKING CORRESPONDING
10776 CHANGES TO CODE IN `grokfield'. */
10779 start_method (cp_decl_specifier_seq
*declspecs
,
10780 const cp_declarator
*declarator
, tree attrlist
)
10782 tree fndecl
= grokdeclarator (declarator
, declspecs
, MEMFUNCDEF
, 0,
10785 if (fndecl
== error_mark_node
)
10786 return error_mark_node
;
10788 if (fndecl
== NULL
|| TREE_CODE (fndecl
) != FUNCTION_DECL
)
10790 error ("invalid member function declaration");
10791 return error_mark_node
;
10795 cplus_decl_attributes (&fndecl
, attrlist
, 0);
10797 /* Pass friends other than inline friend functions back. */
10798 if (fndecl
== void_type_node
)
10801 if (DECL_IN_AGGR_P (fndecl
))
10803 if (DECL_CONTEXT (fndecl
)
10804 && TREE_CODE( DECL_CONTEXT (fndecl
)) != NAMESPACE_DECL
)
10805 error ("%qD is already defined in class %qT", fndecl
,
10806 DECL_CONTEXT (fndecl
));
10807 return void_type_node
;
10810 check_template_shadow (fndecl
);
10812 DECL_DECLARED_INLINE_P (fndecl
) = 1;
10813 if (flag_default_inline
)
10814 DECL_INLINE (fndecl
) = 1;
10816 /* We process method specializations in finish_struct_1. */
10817 if (processing_template_decl
&& !DECL_TEMPLATE_SPECIALIZATION (fndecl
))
10819 fndecl
= push_template_decl (fndecl
);
10820 if (fndecl
== error_mark_node
)
10824 if (! DECL_FRIEND_P (fndecl
))
10826 if (TREE_CHAIN (fndecl
))
10828 fndecl
= copy_node (fndecl
);
10829 TREE_CHAIN (fndecl
) = NULL_TREE
;
10831 grok_special_member_properties (fndecl
);
10834 cp_finish_decl (fndecl
, NULL_TREE
, NULL_TREE
, 0);
10836 /* Make a place for the parms. */
10837 begin_scope (sk_function_parms
, fndecl
);
10839 DECL_IN_AGGR_P (fndecl
) = 1;
10843 /* Go through the motions of finishing a function definition.
10844 We don't compile this method until after the whole class has
10847 FINISH_METHOD must return something that looks as though it
10848 came from GROKFIELD (since we are defining a method, after all).
10850 This is called after parsing the body of the function definition.
10851 STMTS is the chain of statements that makes up the function body.
10853 DECL is the ..._DECL that `start_method' provided. */
10856 finish_method (tree decl
)
10858 tree fndecl
= decl
;
10863 if (decl
== void_type_node
)
10866 old_initial
= DECL_INITIAL (fndecl
);
10868 /* Undo the level for the parms (from start_method).
10869 This is like poplevel, but it causes nothing to be
10870 saved. Saving information here confuses symbol-table
10871 output routines. Besides, this information will
10872 be correctly output when this method is actually
10875 /* Clear out the meanings of the local variables of this level;
10876 also record in each decl which block it belongs to. */
10878 for (link
= current_binding_level
->names
; link
; link
= TREE_CHAIN (link
))
10880 if (DECL_NAME (link
) != NULL_TREE
)
10881 pop_binding (DECL_NAME (link
), link
);
10882 gcc_assert (TREE_CODE (link
) != FUNCTION_DECL
);
10883 DECL_CONTEXT (link
) = NULL_TREE
;
10886 poplevel (0, 0, 0);
10888 DECL_INITIAL (fndecl
) = old_initial
;
10890 /* We used to check if the context of FNDECL was different from
10891 current_class_type as another way to get inside here. This didn't work
10892 for String.cc in libg++. */
10893 if (DECL_FRIEND_P (fndecl
))
10895 VEC_safe_push (tree
, CLASSTYPE_INLINE_FRIENDS (current_class_type
),
10897 decl
= void_type_node
;
10904 /* VAR is a VAR_DECL. If its type is incomplete, remember VAR so that
10905 we can lay it out later, when and if its type becomes complete. */
10908 maybe_register_incomplete_var (tree var
)
10910 gcc_assert (TREE_CODE (var
) == VAR_DECL
);
10912 /* Keep track of variables with incomplete types. */
10913 if (!processing_template_decl
&& TREE_TYPE (var
) != error_mark_node
10914 && DECL_EXTERNAL (var
))
10916 tree inner_type
= TREE_TYPE (var
);
10918 while (TREE_CODE (inner_type
) == ARRAY_TYPE
)
10919 inner_type
= TREE_TYPE (inner_type
);
10920 inner_type
= TYPE_MAIN_VARIANT (inner_type
);
10922 if ((!COMPLETE_TYPE_P (inner_type
) && CLASS_TYPE_P (inner_type
))
10923 /* RTTI TD entries are created while defining the type_info. */
10924 || (TYPE_LANG_SPECIFIC (inner_type
)
10925 && TYPE_BEING_DEFINED (inner_type
)))
10926 incomplete_vars
= tree_cons (inner_type
, var
, incomplete_vars
);
10930 /* Called when a class type (given by TYPE) is defined. If there are
10931 any existing VAR_DECLs whose type hsa been completed by this
10932 declaration, update them now. */
10935 complete_vars (tree type
)
10937 tree
*list
= &incomplete_vars
;
10939 gcc_assert (CLASS_TYPE_P (type
));
10942 if (same_type_p (type
, TREE_PURPOSE (*list
)))
10944 tree var
= TREE_VALUE (*list
);
10945 tree type
= TREE_TYPE (var
);
10946 /* Complete the type of the variable. The VAR_DECL itself
10947 will be laid out in expand_expr. */
10948 complete_type (type
);
10949 cp_apply_type_quals_to_decl (cp_type_quals (type
), var
);
10950 /* Remove this entry from the list. */
10951 *list
= TREE_CHAIN (*list
);
10954 list
= &TREE_CHAIN (*list
);
10957 /* Check for pending declarations which may have abstract type. */
10958 complete_type_check_abstract (type
);
10961 /* If DECL is of a type which needs a cleanup, build that cleanup
10965 cxx_maybe_build_cleanup (tree decl
)
10967 tree type
= TREE_TYPE (decl
);
10969 if (type
!= error_mark_node
&& TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type
))
10971 int flags
= LOOKUP_NORMAL
|LOOKUP_DESTRUCTOR
;
10973 bool has_vbases
= (TREE_CODE (type
) == RECORD_TYPE
10974 && CLASSTYPE_VBASECLASSES (type
));
10976 if (TREE_CODE (type
) == ARRAY_TYPE
)
10980 cxx_mark_addressable (decl
);
10981 rval
= build_unary_op (ADDR_EXPR
, decl
, 0);
10984 /* Optimize for space over speed here. */
10985 if (!has_vbases
|| flag_expensive_optimizations
)
10986 flags
|= LOOKUP_NONVIRTUAL
;
10988 rval
= build_delete (TREE_TYPE (rval
), rval
,
10989 sfk_complete_destructor
, flags
, 0);
10996 /* When a stmt has been parsed, this function is called. */
11003 /* DECL was originally constructed as a non-static member function,
11004 but turned out to be static. Update it accordingly. */
11007 revert_static_member_fn (tree decl
)
11010 tree function
= TREE_TYPE (decl
);
11011 tree args
= TYPE_ARG_TYPES (function
);
11013 if (cp_type_quals (TREE_TYPE (TREE_VALUE (args
)))
11014 != TYPE_UNQUALIFIED
)
11015 error ("static member function %q#D declared with type qualifiers", decl
);
11017 args
= TREE_CHAIN (args
);
11018 tmp
= build_function_type (TREE_TYPE (function
), args
);
11019 tmp
= build_qualified_type (tmp
, cp_type_quals (function
));
11020 tmp
= build_exception_variant (tmp
,
11021 TYPE_RAISES_EXCEPTIONS (function
));
11022 TREE_TYPE (decl
) = tmp
;
11023 if (DECL_ARGUMENTS (decl
))
11024 DECL_ARGUMENTS (decl
) = TREE_CHAIN (DECL_ARGUMENTS (decl
));
11025 DECL_STATIC_FUNCTION_P (decl
) = 1;
11028 /* Initialize the variables used during compilation of a C++
11032 cxx_push_function_context (struct function
* f
)
11034 struct language_function
*p
= GGC_CNEW (struct language_function
);
11037 /* Whenever we start a new function, we destroy temporaries in the
11039 current_stmt_tree ()->stmts_are_full_exprs_p
= 1;
11045 if (DECL_SAVED_FUNCTION_DATA (fn
))
11047 /* If we already parsed this function, and we're just expanding it
11048 now, restore saved state. */
11049 *cp_function_chain
= *DECL_SAVED_FUNCTION_DATA (fn
);
11051 /* We don't need the saved data anymore. Unless this is an inline
11052 function; we need the named return value info for
11053 declare_return_variable. */
11054 if (! DECL_INLINE (fn
))
11055 DECL_SAVED_FUNCTION_DATA (fn
) = NULL
;
11060 /* Free the language-specific parts of F, now that we've finished
11061 compiling the function. */
11064 cxx_pop_function_context (struct function
* f
)
11069 /* Return which tree structure is used by T, or TS_CP_GENERIC if T is
11070 one of the language-independent trees. */
11072 enum cp_tree_node_structure_enum
11073 cp_tree_node_structure (union lang_tree_node
* t
)
11075 switch (TREE_CODE (&t
->generic
))
11077 case DEFAULT_ARG
: return TS_CP_DEFAULT_ARG
;
11078 case IDENTIFIER_NODE
: return TS_CP_IDENTIFIER
;
11079 case OVERLOAD
: return TS_CP_OVERLOAD
;
11080 case TEMPLATE_PARM_INDEX
: return TS_CP_TPI
;
11081 case TINST_LEVEL
: return TS_CP_TINST_LEVEL
;
11082 case PTRMEM_CST
: return TS_CP_PTRMEM
;
11083 case BASELINK
: return TS_CP_BASELINK
;
11084 default: return TS_CP_GENERIC
;
11088 /* Build the void_list_node (void_type_node having been created). */
11090 build_void_list_node (void)
11092 tree t
= build_tree_list (NULL_TREE
, void_type_node
);
11097 cp_missing_noreturn_ok_p (tree decl
)
11099 /* A missing noreturn is ok for the `main' function. */
11100 return DECL_MAIN_P (decl
);
11103 /* Return the COMDAT group into which DECL should be placed. */
11106 cxx_comdat_group (tree decl
)
11110 /* Virtual tables, construction virtual tables, and virtual table
11111 tables all go in a single COMDAT group, named after the primary
11113 if (TREE_CODE (decl
) == VAR_DECL
&& DECL_VTABLE_OR_VTT_P (decl
))
11114 name
= DECL_ASSEMBLER_NAME (CLASSTYPE_VTABLES (DECL_CONTEXT (decl
)));
11115 /* For all other DECLs, the COMDAT group is the mangled name of the
11116 declaration itself. */
11118 name
= DECL_ASSEMBLER_NAME (decl
);
11120 return IDENTIFIER_POINTER (name
);
11123 #include "gt-cp-decl.h"