1 /* Process declarations and variables for C++ compiler.
2 Copyright (C) 1988, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000,
3 2001, 2002, 2003, 2004 Free Software Foundation, Inc.
4 Contributed by Michael Tiemann (tiemann@cygnus.com)
6 This file is part of GCC.
8 GCC is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2, or (at your option)
13 GCC is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with GCC; see the file COPYING. If not, write to
20 the Free Software Foundation, 59 Temple Place - Suite 330,
21 Boston, MA 02111-1307, USA. */
24 /* Process declarations and symbol lookup for C++ front end.
25 Also constructs types; the standard scalar types at initialization,
26 and structure, union, array and enum types when they are declared. */
28 /* ??? not all decl nodes are given the most useful possible
29 line numbers. For example, the CONST_DECLs for enum values. */
33 #include "coretypes.h"
40 #include "tree-inline.h"
50 #include "diagnostic.h"
53 #include "tree-flow.h"
55 static tree
grokparms (cp_parameter_declarator
*, tree
*);
56 static const char *redeclaration_error_message (tree
, tree
);
58 static int decl_jump_unsafe (tree
);
59 static void require_complete_types_for_parms (tree
);
60 static int ambi_op_p (enum tree_code
);
61 static int unary_op_p (enum tree_code
);
62 static void push_local_name (tree
);
63 static tree
grok_reference_init (tree
, tree
, tree
, tree
*);
64 static tree
grokfndecl (tree
, tree
, tree
, tree
, tree
, int,
65 enum overload_flags
, cp_cv_quals
,
66 tree
, int, int, int, int, int, int, tree
,
68 static tree
grokvardecl (tree
, tree
, const cp_decl_specifier_seq
*,
70 static void record_unknown_type (tree
, const char *);
71 static tree
builtin_function_1 (const char *, tree
, tree
,
72 enum built_in_function code
,
73 enum built_in_class cl
, const char *,
75 static tree
build_library_fn_1 (tree
, enum tree_code
, tree
);
76 static int member_function_or_else (tree
, tree
, enum overload_flags
);
77 static void bad_specifiers (tree
, const char *, int, int, int, int,
79 static void check_for_uninitialized_const_var (tree
);
80 static hashval_t
typename_hash (const void *);
81 static int typename_compare (const void *, const void *);
82 static tree
local_variable_p_walkfn (tree
*, int *, void *);
83 static tree
record_builtin_java_type (const char *, int);
84 static const char *tag_name (enum tag_types
);
85 static tree
lookup_and_check_tag (enum tag_types
, tree
, bool globalize
, bool);
86 static int walk_namespaces_r (tree
, walk_namespaces_fn
, void *);
87 static int walk_globals_r (tree
, void*);
88 static int walk_vtables_r (tree
, void*);
89 static tree
make_label_decl (tree
, int);
90 static void use_label (tree
);
91 static void check_previous_goto_1 (tree
, struct cp_binding_level
*, tree
,
93 static void check_previous_goto (struct named_label_use_list
*);
94 static void check_switch_goto (struct cp_binding_level
*);
95 static void check_previous_gotos (tree
);
96 static void pop_label (tree
, tree
);
97 static void pop_labels (tree
);
98 static void maybe_deduce_size_from_array_init (tree
, tree
);
99 static void layout_var_decl (tree
);
100 static void maybe_commonize_var (tree
);
101 static tree
check_initializer (tree
, tree
, int, tree
*);
102 static void make_rtl_for_nonlocal_decl (tree
, tree
, const char *);
103 static void save_function_data (tree
);
104 static void check_function_type (tree
, tree
);
105 static void finish_constructor_body (void);
106 static void begin_destructor_body (void);
107 static void finish_destructor_body (void);
108 static tree
create_array_type_for_decl (tree
, tree
, tree
);
109 static tree
get_atexit_node (void);
110 static tree
get_dso_handle_node (void);
111 static tree
start_cleanup_fn (void);
112 static void end_cleanup_fn (void);
113 static tree
cp_make_fname_decl (tree
, int);
114 static void initialize_predefined_identifiers (void);
115 static tree check_special_function_return_type
116 (special_function_kind
, tree
, tree
);
117 static tree
push_cp_library_fn (enum tree_code
, tree
);
118 static tree
build_cp_library_fn (tree
, enum tree_code
, tree
);
119 static void store_parm_decls (tree
);
120 static void initialize_local_var (tree
, tree
);
121 static void expand_static_init (tree
, tree
);
122 static tree
next_initializable_field (tree
);
123 static tree
reshape_init (tree
, tree
*);
124 static tree
build_typename_type (tree
, tree
, tree
);
126 /* Erroneous argument lists can use this *IFF* they do not modify it. */
127 tree error_mark_list
;
129 /* The following symbols are subsumed in the cp_global_trees array, and
130 listed here individually for documentation purposes.
133 tree wchar_decl_node;
135 tree vtable_entry_type;
136 tree delta_type_node;
137 tree __t_desc_type_node;
138 tree ti_desc_type_node;
139 tree bltn_desc_type_node, ptr_desc_type_node;
140 tree ary_desc_type_node, func_desc_type_node, enum_desc_type_node;
141 tree class_desc_type_node, si_class_desc_type_node, vmi_class_desc_type_node;
142 tree ptm_desc_type_node;
143 tree base_desc_type_node;
145 tree class_type_node;
146 tree unknown_type_node;
148 Array type `vtable_entry_type[]'
151 tree vtbl_ptr_type_node;
158 A FUNCTION_DECL which can call `abort'. Not necessarily the
159 one that the user will declare, but sufficient to be called
160 by routines that want to abort the program.
164 The FUNCTION_DECL for the default `::operator delete'.
166 tree global_delete_fndecl;
169 tree type_info_type_node, tinfo_decl_id, tinfo_decl_type;
174 tree cp_global_trees
[CPTI_MAX
];
176 /* Indicates that there is a type value in some namespace, although
177 that is not necessarily in scope at the moment. */
179 tree global_type_node
;
181 /* The node that holds the "name" of the global scope. */
182 tree global_scope_name
;
184 /* Used only for jumps to as-yet undefined labels, since jumps to
185 defined labels can have their validity checked immediately. */
187 struct named_label_use_list
GTY(())
189 struct cp_binding_level
*binding_level
;
192 location_t o_goto_locus
;
193 struct named_label_use_list
*next
;
196 #define named_label_uses cp_function_chain->x_named_label_uses
198 #define local_names cp_function_chain->x_local_names
200 /* A list of objects which have constructors or destructors
201 which reside in the global scope. The decl is stored in
202 the TREE_VALUE slot and the initializer is stored
203 in the TREE_PURPOSE slot. */
204 tree static_aggregates
;
208 /* A node for the integer constants 2, and 3. */
210 tree integer_two_node
, integer_three_node
;
212 /* A list of all LABEL_DECLs in the function that have names. Here so
213 we can clear out their names' definitions at the end of the
214 function, and so we can check the validity of jumps to these labels. */
216 struct named_label_list
GTY(())
218 struct cp_binding_level
*binding_level
;
223 struct named_label_list
*next
;
224 unsigned int in_try_scope
: 1;
225 unsigned int in_catch_scope
: 1;
228 #define named_labels cp_function_chain->x_named_labels
230 /* The number of function bodies which we are currently processing.
231 (Zero if we are at namespace scope, one inside the body of a
232 function, two inside the body of a function in a local class, etc.) */
235 /* States indicating how grokdeclarator() should handle declspecs marked
236 with __attribute__((deprecated)). An object declared as
237 __attribute__((deprecated)) suppresses warnings of uses of other
240 enum deprecated_states
{
245 static enum deprecated_states deprecated_state
= DEPRECATED_NORMAL
;
247 /* True if a declaration with an `extern' linkage specifier is being
249 bool have_extern_spec
;
252 /* A TREE_LIST of VAR_DECLs. The TREE_PURPOSE is a RECORD_TYPE or
253 UNION_TYPE; the TREE_VALUE is a VAR_DECL with that type. At the
254 time the VAR_DECL was declared, the type was incomplete. */
256 static GTY(()) tree incomplete_vars
;
258 /* Returns the kind of template specialization we are currently
259 processing, given that it's declaration contained N_CLASS_SCOPES
260 explicit scope qualifications. */
263 current_tmpl_spec_kind (int n_class_scopes
)
265 int n_template_parm_scopes
= 0;
266 int seen_specialization_p
= 0;
267 int innermost_specialization_p
= 0;
268 struct cp_binding_level
*b
;
270 /* Scan through the template parameter scopes. */
271 for (b
= current_binding_level
;
272 b
->kind
== sk_template_parms
;
275 /* If we see a specialization scope inside a parameter scope,
276 then something is wrong. That corresponds to a declaration
279 template <class T> template <> ...
281 which is always invalid since [temp.expl.spec] forbids the
282 specialization of a class member template if the enclosing
283 class templates are not explicitly specialized as well. */
284 if (b
->explicit_spec_p
)
286 if (n_template_parm_scopes
== 0)
287 innermost_specialization_p
= 1;
289 seen_specialization_p
= 1;
291 else if (seen_specialization_p
== 1)
292 return tsk_invalid_member_spec
;
294 ++n_template_parm_scopes
;
297 /* Handle explicit instantiations. */
298 if (processing_explicit_instantiation
)
300 if (n_template_parm_scopes
!= 0)
301 /* We've seen a template parameter list during an explicit
302 instantiation. For example:
304 template <class T> template void f(int);
306 This is erroneous. */
307 return tsk_invalid_expl_inst
;
309 return tsk_expl_inst
;
312 if (n_template_parm_scopes
< n_class_scopes
)
313 /* We've not seen enough template headers to match all the
314 specialized classes present. For example:
316 template <class T> void R<T>::S<T>::f(int);
318 This is invalid; there needs to be one set of template
319 parameters for each class. */
320 return tsk_insufficient_parms
;
321 else if (n_template_parm_scopes
== n_class_scopes
)
322 /* We're processing a non-template declaration (even though it may
323 be a member of a template class.) For example:
325 template <class T> void S<T>::f(int);
327 The `class T' maches the `S<T>', leaving no template headers
328 corresponding to the `f'. */
330 else if (n_template_parm_scopes
> n_class_scopes
+ 1)
331 /* We've got too many template headers. For example:
333 template <> template <class T> void f (T);
335 There need to be more enclosing classes. */
336 return tsk_excessive_parms
;
338 /* This must be a template. It's of the form:
340 template <class T> template <class U> void S<T>::f(U);
342 This is a specialization if the innermost level was a
343 specialization; otherwise it's just a definition of the
345 return innermost_specialization_p
? tsk_expl_spec
: tsk_template
;
348 /* Exit the current scope. */
356 /* When a label goes out of scope, check to see if that label was used
357 in a valid manner, and issue any appropriate warnings or errors. */
360 pop_label (tree label
, tree old_value
)
362 if (!processing_template_decl
)
364 if (DECL_INITIAL (label
) == NULL_TREE
)
368 cp_error_at ("label %qD used but not defined", label
);
369 #ifdef USE_MAPPED_LOCATION
370 location
= input_location
; /* FIXME want (input_filename, (line)0) */
372 location
.file
= input_filename
;
375 /* Avoid crashing later. */
376 define_label (location
, DECL_NAME (label
));
378 else if (warn_unused_label
&& !TREE_USED (label
))
379 cp_warning_at ("label %qD defined but not used", label
);
382 SET_IDENTIFIER_LABEL_VALUE (DECL_NAME (label
), old_value
);
385 /* At the end of a function, all labels declared within the function
386 go out of scope. BLOCK is the top-level block for the
390 pop_labels (tree block
)
392 struct named_label_list
*link
;
394 /* Clear out the definitions of all label names, since their scopes
396 for (link
= named_labels
; link
; link
= link
->next
)
398 pop_label (link
->label_decl
, link
->old_value
);
399 /* Put the labels into the "variables" of the top-level block,
400 so debugger can see them. */
401 TREE_CHAIN (link
->label_decl
) = BLOCK_VARS (block
);
402 BLOCK_VARS (block
) = link
->label_decl
;
408 /* The following two routines are used to interface to Objective-C++.
409 The binding level is purposely treated as an opaque type. */
412 objc_get_current_scope (void)
414 return current_binding_level
;
417 /* The following routine is used by the NeXT-style SJLJ exceptions;
418 variables get marked 'volatile' so as to not be clobbered by
419 _setjmp()/_longjmp() calls. All variables in the current scope,
420 as well as parent scopes up to (but not including) ENCLOSING_BLK
421 shall be thusly marked. */
424 objc_mark_locals_volatile (void *enclosing_blk
)
426 struct cp_binding_level
*scope
;
428 for (scope
= current_binding_level
;
429 scope
&& scope
!= enclosing_blk
&& scope
->kind
== sk_block
;
430 scope
= scope
->level_chain
)
434 for (decl
= scope
->names
; decl
; decl
= TREE_CHAIN (decl
))
436 if (TREE_CODE (decl
) == VAR_DECL
)
438 DECL_REGISTER (decl
) = 0;
439 TREE_THIS_VOLATILE (decl
) = 1;
445 /* Exit a binding level.
446 Pop the level off, and restore the state of the identifier-decl mappings
447 that were in effect when this level was entered.
449 If KEEP == 1, this level had explicit declarations, so
450 and create a "block" (a BLOCK node) for the level
451 to record its declarations and subblocks for symbol table output.
453 If FUNCTIONBODY is nonzero, this level is the body of a function,
454 so create a block as if KEEP were set and also clear out all
457 If REVERSE is nonzero, reverse the order of decls before putting
458 them into the BLOCK. */
461 poplevel (int keep
, int reverse
, int functionbody
)
464 /* The chain of decls was accumulated in reverse order.
465 Put it into forward order, just for cleanliness. */
467 int tmp
= functionbody
;
468 int real_functionbody
;
472 int leaving_for_scope
;
475 timevar_push (TV_NAME_LOOKUP
);
480 gcc_assert (current_binding_level
->kind
!= sk_class
);
482 real_functionbody
= (current_binding_level
->kind
== sk_cleanup
483 ? ((functionbody
= 0), tmp
) : functionbody
);
484 subblocks
= functionbody
>= 0 ? current_binding_level
->blocks
: 0;
486 gcc_assert (!VEC_length(cp_class_binding
,
487 current_binding_level
->class_shadowed
));
489 /* We used to use KEEP == 2 to indicate that the new block should go
490 at the beginning of the list of blocks at this binding level,
491 rather than the end. This hack is no longer used. */
492 gcc_assert (keep
== 0 || keep
== 1);
494 if (current_binding_level
->keep
)
497 /* Any uses of undefined labels, and any defined labels, now operate
498 under constraints of next binding contour. */
499 if (cfun
&& !functionbody
)
501 struct cp_binding_level
*level_chain
;
502 level_chain
= current_binding_level
->level_chain
;
505 struct named_label_use_list
*uses
;
506 struct named_label_list
*labels
;
507 for (labels
= named_labels
; labels
; labels
= labels
->next
)
508 if (labels
->binding_level
== current_binding_level
)
511 if (current_binding_level
->kind
== sk_try
)
512 labels
->in_try_scope
= 1;
513 if (current_binding_level
->kind
== sk_catch
)
514 labels
->in_catch_scope
= 1;
515 for (decl
= labels
->names_in_scope
; decl
;
516 decl
= TREE_CHAIN (decl
))
517 if (decl_jump_unsafe (decl
))
518 labels
->bad_decls
= tree_cons (NULL_TREE
, decl
,
520 labels
->binding_level
= level_chain
;
521 labels
->names_in_scope
= level_chain
->names
;
524 for (uses
= named_label_uses
; uses
; uses
= uses
->next
)
525 if (uses
->binding_level
== current_binding_level
)
527 uses
->binding_level
= level_chain
;
528 uses
->names_in_scope
= level_chain
->names
;
533 /* Get the decls in the order they were written.
534 Usually current_binding_level->names is in reverse order.
535 But parameter decls were previously put in forward order. */
538 current_binding_level
->names
539 = decls
= nreverse (current_binding_level
->names
);
541 decls
= current_binding_level
->names
;
543 /* If there were any declarations or structure tags in that level,
544 or if this level is a function body,
545 create a BLOCK to record them for the life of this function. */
547 if (keep
== 1 || functionbody
)
548 block
= make_node (BLOCK
);
549 if (block
!= NULL_TREE
)
551 BLOCK_VARS (block
) = decls
;
552 BLOCK_SUBBLOCKS (block
) = subblocks
;
555 /* In each subblock, record that this is its superior. */
557 for (link
= subblocks
; link
; link
= TREE_CHAIN (link
))
558 BLOCK_SUPERCONTEXT (link
) = block
;
560 /* We still support the old for-scope rules, whereby the variables
561 in a for-init statement were in scope after the for-statement
562 ended. We only use the new rules if flag_new_for_scope is
565 = current_binding_level
->kind
== sk_for
&& flag_new_for_scope
== 1;
567 /* Before we remove the declarations first check for unused variables. */
568 if (warn_unused_variable
569 && !processing_template_decl
)
570 for (decl
= getdecls (); decl
; decl
= TREE_CHAIN (decl
))
571 if (TREE_CODE (decl
) == VAR_DECL
572 && ! TREE_USED (decl
)
573 && ! DECL_IN_SYSTEM_HEADER (decl
)
574 && DECL_NAME (decl
) && ! DECL_ARTIFICIAL (decl
))
575 warning ("%Junused variable %qD", decl
, decl
);
577 /* Remove declarations for all the DECLs in this level. */
578 for (link
= decls
; link
; link
= TREE_CHAIN (link
))
580 if (leaving_for_scope
&& TREE_CODE (link
) == VAR_DECL
583 tree name
= DECL_NAME (link
);
587 ob
= outer_binding (name
,
588 IDENTIFIER_BINDING (name
),
591 ns_binding
= IDENTIFIER_NAMESPACE_VALUE (name
);
593 ns_binding
= NULL_TREE
;
595 if (ob
&& ob
->scope
== current_binding_level
->level_chain
)
596 /* We have something like:
601 and we are leaving the `for' scope. There's no reason to
602 keep the binding of the inner `i' in this case. */
603 pop_binding (name
, link
);
604 else if ((ob
&& (TREE_CODE (ob
->value
) == TYPE_DECL
))
605 || (ns_binding
&& TREE_CODE (ns_binding
) == TYPE_DECL
))
606 /* Here, we have something like:
614 We must pop the for-scope binding so we know what's a
615 type and what isn't. */
616 pop_binding (name
, link
);
619 /* Mark this VAR_DECL as dead so that we can tell we left it
620 there only for backward compatibility. */
621 DECL_DEAD_FOR_LOCAL (link
) = 1;
623 /* Keep track of what should have happened when we
624 popped the binding. */
626 DECL_SHADOWED_FOR_VAR (link
) = ob
->value
;
628 /* Add it to the list of dead variables in the next
629 outermost binding to that we can remove these when we
630 leave that binding. */
631 current_binding_level
->level_chain
->dead_vars_from_for
632 = tree_cons (NULL_TREE
, link
,
633 current_binding_level
->level_chain
->
636 /* Although we don't pop the cxx_binding, we do clear
637 its SCOPE since the scope is going away now. */
638 IDENTIFIER_BINDING (name
)->scope
639 = current_binding_level
->level_chain
;
646 /* Remove the binding. */
649 if (TREE_CODE (decl
) == TREE_LIST
)
650 decl
= TREE_VALUE (decl
);
653 if (TREE_CODE (name
) == OVERLOAD
)
654 name
= OVL_FUNCTION (name
);
656 gcc_assert (DECL_P (name
));
657 pop_binding (DECL_NAME (name
), decl
);
661 /* Remove declarations for any `for' variables from inner scopes
662 that we kept around. */
663 for (link
= current_binding_level
->dead_vars_from_for
;
664 link
; link
= TREE_CHAIN (link
))
665 pop_binding (DECL_NAME (TREE_VALUE (link
)), TREE_VALUE (link
));
667 /* Restore the IDENTIFIER_TYPE_VALUEs. */
668 for (link
= current_binding_level
->type_shadowed
;
669 link
; link
= TREE_CHAIN (link
))
670 SET_IDENTIFIER_TYPE_VALUE (TREE_PURPOSE (link
), TREE_VALUE (link
));
672 /* Restore the IDENTIFIER_LABEL_VALUEs for local labels. */
673 for (link
= current_binding_level
->shadowed_labels
;
675 link
= TREE_CHAIN (link
))
676 pop_label (TREE_VALUE (link
), TREE_PURPOSE (link
));
678 /* There may be OVERLOADs (wrapped in TREE_LISTs) on the BLOCK_VARs
679 list if a `using' declaration put them there. The debugging
680 back-ends won't understand OVERLOAD, so we remove them here.
681 Because the BLOCK_VARS are (temporarily) shared with
682 CURRENT_BINDING_LEVEL->NAMES we must do this fixup after we have
683 popped all the bindings. */
688 for (d
= &BLOCK_VARS (block
); *d
; )
690 if (TREE_CODE (*d
) == TREE_LIST
)
691 *d
= TREE_CHAIN (*d
);
693 d
= &TREE_CHAIN (*d
);
697 /* If the level being exited is the top level of a function,
698 check over all the labels. */
701 /* Since this is the top level block of a function, the vars are
702 the function's parameters. Don't leave them in the BLOCK
703 because they are found in the FUNCTION_DECL instead. */
704 BLOCK_VARS (block
) = 0;
708 kind
= current_binding_level
->kind
;
709 if (kind
== sk_cleanup
)
713 /* If this is a temporary binding created for a cleanup, then we'll
714 have pushed a statement list level. Pop that, create a new
715 BIND_EXPR for the block, and insert it into the stream. */
716 stmt
= pop_stmt_list (current_binding_level
->statement_list
);
717 stmt
= c_build_bind_expr (block
, stmt
);
723 DECL_INITIAL (current_function_decl
) = block
;
725 current_binding_level
->blocks
726 = chainon (current_binding_level
->blocks
, block
);
728 /* If we did not make a block for the level just exited,
729 any blocks made for inner levels
730 (since they cannot be recorded as subblocks in that level)
731 must be carried forward so they will later become subblocks
732 of something else. */
734 current_binding_level
->blocks
735 = chainon (current_binding_level
->blocks
, subblocks
);
737 /* Each and every BLOCK node created here in `poplevel' is important
738 (e.g. for proper debugging information) so if we created one
739 earlier, mark it as "used". */
741 TREE_USED (block
) = 1;
743 /* All temporary bindings created for cleanups are popped silently. */
744 if (kind
== sk_cleanup
)
747 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP
, block
);
750 /* Delete the node BLOCK from the current binding level.
751 This is used for the block inside a stmt expr ({...})
752 so that the block can be reinserted where appropriate. */
755 delete_block (tree block
)
758 if (current_binding_level
->blocks
== block
)
759 current_binding_level
->blocks
= TREE_CHAIN (block
);
760 for (t
= current_binding_level
->blocks
; t
;)
762 if (TREE_CHAIN (t
) == block
)
763 TREE_CHAIN (t
) = TREE_CHAIN (block
);
767 TREE_CHAIN (block
) = NULL_TREE
;
768 /* Clear TREE_USED which is always set by poplevel.
769 The flag is set again if insert_block is called. */
770 TREE_USED (block
) = 0;
773 /* Insert BLOCK at the end of the list of subblocks of the
774 current binding level. This is used when a BIND_EXPR is expanded,
775 to handle the BLOCK node inside the BIND_EXPR. */
778 insert_block (tree block
)
780 TREE_USED (block
) = 1;
781 current_binding_level
->blocks
782 = chainon (current_binding_level
->blocks
, block
);
785 /* Returns nonzero if T is a virtual function table. */
788 vtable_decl_p (tree t
, void* data ATTRIBUTE_UNUSED
)
790 return (TREE_CODE (t
) == VAR_DECL
&& DECL_VIRTUAL_P (t
));
793 /* Returns nonzero if T is a TYPE_DECL for a type with virtual
797 vtype_decl_p (tree t
, void *data ATTRIBUTE_UNUSED
)
799 return (TREE_CODE (t
) == TYPE_DECL
800 && TREE_CODE (TREE_TYPE (t
)) == RECORD_TYPE
801 && TYPE_POLYMORPHIC_P (TREE_TYPE (t
)));
804 struct walk_globals_data
{
810 /* Walk the vtable declarations in NAMESPACE. Whenever one is found
811 for which P returns nonzero, call F with its address. If any call
812 to F returns a nonzero value, return a nonzero value. */
815 walk_vtables_r (tree
namespace, void* data
)
817 struct walk_globals_data
* wgd
= (struct walk_globals_data
*) data
;
818 walk_globals_fn f
= wgd
->f
;
820 tree decl
= NAMESPACE_LEVEL (namespace)->vtables
;
823 for (; decl
; decl
= TREE_CHAIN (decl
))
824 result
|= (*f
) (&decl
, d
);
829 /* Walk the vtable declarations. Whenever one is found for which P
830 returns nonzero, call F with its address. If any call to F
831 returns a nonzero value, return a nonzero value. */
833 walk_vtables (walk_globals_pred p
, walk_globals_fn f
, void *data
)
835 struct walk_globals_data wgd
;
840 return walk_namespaces (walk_vtables_r
, &wgd
);
843 /* Walk all the namespaces contained NAMESPACE, including NAMESPACE
844 itself, calling F for each. The DATA is passed to F as well. */
847 walk_namespaces_r (tree
namespace, walk_namespaces_fn f
, void* data
)
850 tree current
= NAMESPACE_LEVEL (namespace)->namespaces
;
852 result
|= (*f
) (namespace, data
);
854 for (; current
; current
= TREE_CHAIN (current
))
855 result
|= walk_namespaces_r (current
, f
, data
);
860 /* Walk all the namespaces, calling F for each. The DATA is passed to
864 walk_namespaces (walk_namespaces_fn f
, void* data
)
866 return walk_namespaces_r (global_namespace
, f
, data
);
869 /* Walk the global declarations in NAMESPACE. Whenever one is found
870 for which P returns nonzero, call F with its address. If any call
871 to F returns a nonzero value, return a nonzero value. */
874 walk_globals_r (tree
namespace, void* data
)
876 struct walk_globals_data
* wgd
= (struct walk_globals_data
*) data
;
877 walk_globals_pred p
= wgd
->p
;
878 walk_globals_fn f
= wgd
->f
;
883 t
= &NAMESPACE_LEVEL (namespace)->names
;
890 result
|= (*f
) (t
, d
);
892 /* If F changed *T, then *T still points at the next item to
895 t
= &TREE_CHAIN (*t
);
901 /* Walk the global declarations. Whenever one is found for which P
902 returns true, call F with its address. If any call to F
903 returns true, return true. */
906 walk_globals (walk_globals_pred p
, walk_globals_fn f
, void *data
)
908 struct walk_globals_data wgd
;
913 return walk_namespaces (walk_globals_r
, &wgd
);
916 /* Call wrapup_globals_declarations for the globals in NAMESPACE. If
917 DATA is non-NULL, this is the last time we will call
918 wrapup_global_declarations for this NAMESPACE. */
921 wrapup_globals_for_namespace (tree
namespace, void* data
)
923 struct cp_binding_level
*level
= NAMESPACE_LEVEL (namespace);
924 varray_type statics
= level
->static_decls
;
925 tree
*vec
= &VARRAY_TREE (statics
, 0);
926 int len
= VARRAY_ACTIVE_SIZE (statics
);
927 int last_time
= (data
!= 0);
931 check_global_declarations (vec
, len
);
935 /* Write out any globals that need to be output. */
936 return wrapup_global_declarations (vec
, len
);
940 /* In C++, you don't have to write `struct S' to refer to `S'; you
941 can just use `S'. We accomplish this by creating a TYPE_DECL as
942 if the user had written `typedef struct S S'. Create and return
943 the TYPE_DECL for TYPE. */
946 create_implicit_typedef (tree name
, tree type
)
950 decl
= build_decl (TYPE_DECL
, name
, type
);
951 DECL_ARTIFICIAL (decl
) = 1;
952 /* There are other implicit type declarations, like the one *within*
953 a class that allows you to write `S::S'. We must distinguish
955 SET_DECL_IMPLICIT_TYPEDEF_P (decl
);
956 TYPE_NAME (type
) = decl
;
961 /* Remember a local name for name-mangling purposes. */
964 push_local_name (tree decl
)
969 timevar_push (TV_NAME_LOOKUP
);
971 VARRAY_TREE_INIT (local_names
, 8, "local_names");
973 name
= DECL_NAME (decl
);
975 nelts
= VARRAY_ACTIVE_SIZE (local_names
);
976 for (i
= 0; i
< nelts
; i
++)
978 t
= VARRAY_TREE (local_names
, i
);
979 if (DECL_NAME (t
) == name
)
981 if (!DECL_LANG_SPECIFIC (decl
))
982 retrofit_lang_decl (decl
);
983 DECL_LANG_SPECIFIC (decl
)->decl_flags
.u2sel
= 1;
984 if (DECL_LANG_SPECIFIC (t
))
985 DECL_DISCRIMINATOR (decl
) = DECL_DISCRIMINATOR (t
) + 1;
987 DECL_DISCRIMINATOR (decl
) = 1;
989 VARRAY_TREE (local_names
, i
) = decl
;
990 timevar_pop (TV_NAME_LOOKUP
);
995 VARRAY_PUSH_TREE (local_names
, decl
);
996 timevar_pop (TV_NAME_LOOKUP
);
999 /* Subroutine of duplicate_decls: return truthvalue of whether
1000 or not types of these decls match.
1002 For C++, we must compare the parameter list so that `int' can match
1003 `int&' in a parameter position, but `int&' is not confused with
1007 decls_match (tree newdecl
, tree olddecl
)
1011 if (newdecl
== olddecl
)
1014 if (TREE_CODE (newdecl
) != TREE_CODE (olddecl
))
1015 /* If the two DECLs are not even the same kind of thing, we're not
1016 interested in their types. */
1019 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1021 tree f1
= TREE_TYPE (newdecl
);
1022 tree f2
= TREE_TYPE (olddecl
);
1023 tree p1
= TYPE_ARG_TYPES (f1
);
1024 tree p2
= TYPE_ARG_TYPES (f2
);
1026 if (CP_DECL_CONTEXT (newdecl
) != CP_DECL_CONTEXT (olddecl
)
1027 && ! (DECL_EXTERN_C_P (newdecl
)
1028 && DECL_EXTERN_C_P (olddecl
)))
1031 if (TREE_CODE (f1
) != TREE_CODE (f2
))
1034 if (same_type_p (TREE_TYPE (f1
), TREE_TYPE (f2
)))
1036 if (p2
== NULL_TREE
&& DECL_EXTERN_C_P (olddecl
)
1037 && (DECL_BUILT_IN (olddecl
)
1038 #ifndef NO_IMPLICIT_EXTERN_C
1039 || (DECL_IN_SYSTEM_HEADER (newdecl
) && !DECL_CLASS_SCOPE_P (newdecl
))
1040 || (DECL_IN_SYSTEM_HEADER (olddecl
) && !DECL_CLASS_SCOPE_P (olddecl
))
1044 types_match
= self_promoting_args_p (p1
);
1045 if (p1
== void_list_node
)
1046 TREE_TYPE (newdecl
) = TREE_TYPE (olddecl
);
1048 #ifndef NO_IMPLICIT_EXTERN_C
1049 else if (p1
== NULL_TREE
1050 && (DECL_EXTERN_C_P (olddecl
)
1051 && DECL_IN_SYSTEM_HEADER (olddecl
)
1052 && !DECL_CLASS_SCOPE_P (olddecl
))
1053 && (DECL_EXTERN_C_P (newdecl
)
1054 && DECL_IN_SYSTEM_HEADER (newdecl
)
1055 && !DECL_CLASS_SCOPE_P (newdecl
)))
1057 types_match
= self_promoting_args_p (p2
);
1058 TREE_TYPE (newdecl
) = TREE_TYPE (olddecl
);
1062 types_match
= compparms (p1
, p2
);
1067 else if (TREE_CODE (newdecl
) == TEMPLATE_DECL
)
1069 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
))
1070 != TREE_CODE (DECL_TEMPLATE_RESULT (olddecl
)))
1073 if (!comp_template_parms (DECL_TEMPLATE_PARMS (newdecl
),
1074 DECL_TEMPLATE_PARMS (olddecl
)))
1077 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) == TYPE_DECL
)
1078 types_match
= same_type_p (TREE_TYPE (DECL_TEMPLATE_RESULT (olddecl
)),
1079 TREE_TYPE (DECL_TEMPLATE_RESULT (newdecl
)));
1081 types_match
= decls_match (DECL_TEMPLATE_RESULT (olddecl
),
1082 DECL_TEMPLATE_RESULT (newdecl
));
1086 if (TREE_TYPE (newdecl
) == error_mark_node
)
1087 types_match
= TREE_TYPE (olddecl
) == error_mark_node
;
1088 else if (TREE_TYPE (olddecl
) == NULL_TREE
)
1089 types_match
= TREE_TYPE (newdecl
) == NULL_TREE
;
1090 else if (TREE_TYPE (newdecl
) == NULL_TREE
)
1093 types_match
= comptypes (TREE_TYPE (newdecl
),
1094 TREE_TYPE (olddecl
),
1095 COMPARE_REDECLARATION
);
1101 /* If NEWDECL is `static' and an `extern' was seen previously,
1102 warn about it. OLDDECL is the previous declaration.
1104 Note that this does not apply to the C++ case of declaring
1105 a variable `extern const' and then later `const'.
1107 Don't complain about built-in functions, since they are beyond
1108 the user's control. */
1111 warn_extern_redeclared_static (tree newdecl
, tree olddecl
)
1115 if (TREE_CODE (newdecl
) == TYPE_DECL
1116 || TREE_CODE (newdecl
) == TEMPLATE_DECL
1117 || TREE_CODE (newdecl
) == CONST_DECL
1118 || TREE_CODE (newdecl
) == NAMESPACE_DECL
)
1121 /* Don't get confused by static member functions; that's a different
1123 if (TREE_CODE (newdecl
) == FUNCTION_DECL
1124 && DECL_STATIC_FUNCTION_P (newdecl
))
1127 /* If the old declaration was `static', or the new one isn't, then
1128 then everything is OK. */
1129 if (DECL_THIS_STATIC (olddecl
) || !DECL_THIS_STATIC (newdecl
))
1132 /* It's OK to declare a builtin function as `static'. */
1133 if (TREE_CODE (olddecl
) == FUNCTION_DECL
1134 && DECL_ARTIFICIAL (olddecl
))
1137 name
= DECL_ASSEMBLER_NAME (newdecl
);
1138 pedwarn ("%qD was declared %<extern%> and later %<static%>", newdecl
);
1139 cp_pedwarn_at ("previous declaration of %qD", olddecl
);
1142 /* If NEWDECL is a redeclaration of OLDDECL, merge the declarations.
1143 If the redeclaration is invalid, a diagnostic is issued, and the
1144 error_mark_node is returned. Otherwise, OLDDECL is returned.
1146 If NEWDECL is not a redeclaration of OLDDECL, NULL_TREE is
1150 duplicate_decls (tree newdecl
, tree olddecl
)
1152 unsigned olddecl_uid
= DECL_UID (olddecl
);
1153 int olddecl_friend
= 0, types_match
= 0;
1154 int new_defines_function
= 0;
1156 if (newdecl
== olddecl
)
1159 types_match
= decls_match (newdecl
, olddecl
);
1161 /* If either the type of the new decl or the type of the old decl is an
1162 error_mark_node, then that implies that we have already issued an
1163 error (earlier) for some bogus type specification, and in that case,
1164 it is rather pointless to harass the user with yet more error message
1165 about the same declaration, so just pretend the types match here. */
1166 if (TREE_TYPE (newdecl
) == error_mark_node
1167 || TREE_TYPE (olddecl
) == error_mark_node
)
1170 if (DECL_P (olddecl
)
1171 && TREE_CODE (newdecl
) == FUNCTION_DECL
1172 && TREE_CODE (olddecl
) == FUNCTION_DECL
1173 && (DECL_UNINLINABLE (newdecl
) || DECL_UNINLINABLE (olddecl
)))
1175 if (DECL_DECLARED_INLINE_P (newdecl
)
1176 && DECL_UNINLINABLE (newdecl
)
1177 && lookup_attribute ("noinline", DECL_ATTRIBUTES (newdecl
)))
1178 /* Already warned elsewhere. */;
1179 else if (DECL_DECLARED_INLINE_P (olddecl
)
1180 && DECL_UNINLINABLE (olddecl
)
1181 && lookup_attribute ("noinline", DECL_ATTRIBUTES (olddecl
)))
1182 /* Already warned. */;
1183 else if (DECL_DECLARED_INLINE_P (newdecl
)
1184 && DECL_UNINLINABLE (olddecl
)
1185 && lookup_attribute ("noinline", DECL_ATTRIBUTES (olddecl
)))
1187 warning ("%Jfunction %qD redeclared as inline", newdecl
, newdecl
);
1188 warning ("%Jprevious declaration of %qD with attribute noinline",
1191 else if (DECL_DECLARED_INLINE_P (olddecl
)
1192 && DECL_UNINLINABLE (newdecl
)
1193 && lookup_attribute ("noinline", DECL_ATTRIBUTES (newdecl
)))
1195 warning ("%Jfunction %qD redeclared with attribute noinline",
1197 warning ("%Jprevious declaration of %qD was inline",
1202 /* Check for redeclaration and other discrepancies. */
1203 if (TREE_CODE (olddecl
) == FUNCTION_DECL
1204 && DECL_ARTIFICIAL (olddecl
))
1206 if (TREE_CODE (newdecl
) != FUNCTION_DECL
)
1208 /* Avoid warnings redeclaring anticipated built-ins. */
1209 if (DECL_ANTICIPATED (olddecl
))
1212 /* If you declare a built-in or predefined function name as static,
1213 the old definition is overridden, but optionally warn this was a
1214 bad choice of name. */
1215 if (! TREE_PUBLIC (newdecl
))
1218 warning ("shadowing %s function %q#D",
1219 DECL_BUILT_IN (olddecl
) ? "built-in" : "library",
1221 /* Discard the old built-in function. */
1224 /* If the built-in is not ansi, then programs can override
1225 it even globally without an error. */
1226 else if (! DECL_BUILT_IN (olddecl
))
1227 warning ("library function %q#D redeclared as non-function %q#D",
1231 error ("declaration of %q#D", newdecl
);
1232 error ("conflicts with built-in declaration %q#D",
1237 else if (!types_match
)
1239 /* Avoid warnings redeclaring anticipated built-ins. */
1240 if (DECL_ANTICIPATED (olddecl
))
1242 /* Deal with fileptr_type_node. FILE type is not known
1243 at the time we create the builtins. */
1246 for (t1
= TYPE_ARG_TYPES (TREE_TYPE (newdecl
)),
1247 t2
= TYPE_ARG_TYPES (TREE_TYPE (olddecl
));
1249 t1
= TREE_CHAIN (t1
), t2
= TREE_CHAIN (t2
))
1252 else if (TREE_VALUE (t2
) == fileptr_type_node
)
1254 tree t
= TREE_VALUE (t1
);
1256 if (TREE_CODE (t
) == POINTER_TYPE
1257 && TYPE_NAME (TREE_TYPE (t
))
1258 && DECL_NAME (TYPE_NAME (TREE_TYPE (t
)))
1259 == get_identifier ("FILE")
1260 && compparms (TREE_CHAIN (t1
), TREE_CHAIN (t2
)))
1262 tree oldargs
= TYPE_ARG_TYPES (TREE_TYPE (olddecl
));
1264 TYPE_ARG_TYPES (TREE_TYPE (olddecl
))
1265 = TYPE_ARG_TYPES (TREE_TYPE (newdecl
));
1266 types_match
= decls_match (newdecl
, olddecl
);
1268 return duplicate_decls (newdecl
, olddecl
);
1269 TYPE_ARG_TYPES (TREE_TYPE (olddecl
)) = oldargs
;
1272 else if (! same_type_p (TREE_VALUE (t1
), TREE_VALUE (t2
)))
1275 else if ((DECL_EXTERN_C_P (newdecl
)
1276 && DECL_EXTERN_C_P (olddecl
))
1277 || compparms (TYPE_ARG_TYPES (TREE_TYPE (newdecl
)),
1278 TYPE_ARG_TYPES (TREE_TYPE (olddecl
))))
1280 /* A near match; override the builtin. */
1282 if (TREE_PUBLIC (newdecl
))
1284 warning ("new declaration %q#D", newdecl
);
1285 warning ("ambiguates built-in declaration %q#D",
1288 else if (warn_shadow
)
1289 warning ("shadowing %s function %q#D",
1290 DECL_BUILT_IN (olddecl
) ? "built-in" : "library",
1294 /* Discard the old built-in function. */
1297 /* Replace the old RTL to avoid problems with inlining. */
1298 COPY_DECL_RTL (newdecl
, olddecl
);
1300 /* Even if the types match, prefer the new declarations type
1301 for anticipated built-ins, for exception lists, etc... */
1302 else if (DECL_ANTICIPATED (olddecl
))
1304 tree type
= TREE_TYPE (newdecl
);
1305 tree attribs
= (*targetm
.merge_type_attributes
)
1306 (TREE_TYPE (olddecl
), type
);
1308 type
= cp_build_type_attribute_variant (type
, attribs
);
1309 TREE_TYPE (newdecl
) = TREE_TYPE (olddecl
) = type
;
1312 /* Whether or not the builtin can throw exceptions has no
1313 bearing on this declarator. */
1314 TREE_NOTHROW (olddecl
) = 0;
1316 if (DECL_THIS_STATIC (newdecl
) && !DECL_THIS_STATIC (olddecl
))
1318 /* If a builtin function is redeclared as `static', merge
1319 the declarations, but make the original one static. */
1320 DECL_THIS_STATIC (olddecl
) = 1;
1321 TREE_PUBLIC (olddecl
) = 0;
1323 /* Make the old declaration consistent with the new one so
1324 that all remnants of the builtin-ness of this function
1325 will be banished. */
1326 SET_DECL_LANGUAGE (olddecl
, DECL_LANGUAGE (newdecl
));
1327 COPY_DECL_RTL (newdecl
, olddecl
);
1330 else if (TREE_CODE (olddecl
) != TREE_CODE (newdecl
))
1332 if ((TREE_CODE (olddecl
) == TYPE_DECL
&& DECL_ARTIFICIAL (olddecl
)
1333 && TREE_CODE (newdecl
) != TYPE_DECL
1334 && ! (TREE_CODE (newdecl
) == TEMPLATE_DECL
1335 && TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) == TYPE_DECL
))
1336 || (TREE_CODE (newdecl
) == TYPE_DECL
&& DECL_ARTIFICIAL (newdecl
)
1337 && TREE_CODE (olddecl
) != TYPE_DECL
1338 && ! (TREE_CODE (olddecl
) == TEMPLATE_DECL
1339 && (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl
))
1342 /* We do nothing special here, because C++ does such nasty
1343 things with TYPE_DECLs. Instead, just let the TYPE_DECL
1344 get shadowed, and know that if we need to find a TYPE_DECL
1345 for a given name, we can look in the IDENTIFIER_TYPE_VALUE
1346 slot of the identifier. */
1350 if ((TREE_CODE (newdecl
) == FUNCTION_DECL
1351 && DECL_FUNCTION_TEMPLATE_P (olddecl
))
1352 || (TREE_CODE (olddecl
) == FUNCTION_DECL
1353 && DECL_FUNCTION_TEMPLATE_P (newdecl
)))
1356 error ("%q#D redeclared as different kind of symbol", newdecl
);
1357 if (TREE_CODE (olddecl
) == TREE_LIST
)
1358 olddecl
= TREE_VALUE (olddecl
);
1359 cp_error_at ("previous declaration of %q#D", olddecl
);
1361 return error_mark_node
;
1363 else if (!types_match
)
1365 if (CP_DECL_CONTEXT (newdecl
) != CP_DECL_CONTEXT (olddecl
))
1366 /* These are certainly not duplicate declarations; they're
1367 from different scopes. */
1370 if (TREE_CODE (newdecl
) == TEMPLATE_DECL
)
1372 /* The name of a class template may not be declared to refer to
1373 any other template, class, function, object, namespace, value,
1374 or type in the same scope. */
1375 if (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl
)) == TYPE_DECL
1376 || TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) == TYPE_DECL
)
1378 error ("declaration of template %q#D", newdecl
);
1379 cp_error_at ("conflicts with previous declaration %q#D",
1382 else if (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl
)) == FUNCTION_DECL
1383 && TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) == FUNCTION_DECL
1384 && compparms (TYPE_ARG_TYPES (TREE_TYPE (DECL_TEMPLATE_RESULT (olddecl
))),
1385 TYPE_ARG_TYPES (TREE_TYPE (DECL_TEMPLATE_RESULT (newdecl
))))
1386 && comp_template_parms (DECL_TEMPLATE_PARMS (newdecl
),
1387 DECL_TEMPLATE_PARMS (olddecl
))
1388 /* Template functions can be disambiguated by
1390 && same_type_p (TREE_TYPE (TREE_TYPE (newdecl
)),
1391 TREE_TYPE (TREE_TYPE (olddecl
))))
1393 error ("new declaration %q#D", newdecl
);
1394 cp_error_at ("ambiguates old declaration %q#D", olddecl
);
1398 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1400 if (DECL_EXTERN_C_P (newdecl
) && DECL_EXTERN_C_P (olddecl
))
1402 error ("declaration of C function %q#D conflicts with",
1404 cp_error_at ("previous declaration %q#D here", olddecl
);
1406 else if (compparms (TYPE_ARG_TYPES (TREE_TYPE (newdecl
)),
1407 TYPE_ARG_TYPES (TREE_TYPE (olddecl
))))
1409 error ("new declaration %q#D", newdecl
);
1410 cp_error_at ("ambiguates old declaration %q#D", olddecl
);
1417 error ("conflicting declaration %q#D", newdecl
);
1418 cp_error_at ("%qD has a previous declaration as %q#D",
1423 else if (TREE_CODE (newdecl
) == FUNCTION_DECL
1424 && ((DECL_TEMPLATE_SPECIALIZATION (olddecl
)
1425 && (!DECL_TEMPLATE_INFO (newdecl
)
1426 || (DECL_TI_TEMPLATE (newdecl
)
1427 != DECL_TI_TEMPLATE (olddecl
))))
1428 || (DECL_TEMPLATE_SPECIALIZATION (newdecl
)
1429 && (!DECL_TEMPLATE_INFO (olddecl
)
1430 || (DECL_TI_TEMPLATE (olddecl
)
1431 != DECL_TI_TEMPLATE (newdecl
))))))
1432 /* It's OK to have a template specialization and a non-template
1433 with the same type, or to have specializations of two
1434 different templates with the same type. Note that if one is a
1435 specialization, and the other is an instantiation of the same
1436 template, that we do not exit at this point. That situation
1437 can occur if we instantiate a template class, and then
1438 specialize one of its methods. This situation is valid, but
1439 the declarations must be merged in the usual way. */
1441 else if (TREE_CODE (newdecl
) == FUNCTION_DECL
1442 && ((DECL_TEMPLATE_INSTANTIATION (olddecl
)
1443 && !DECL_USE_TEMPLATE (newdecl
))
1444 || (DECL_TEMPLATE_INSTANTIATION (newdecl
)
1445 && !DECL_USE_TEMPLATE (olddecl
))))
1446 /* One of the declarations is a template instantiation, and the
1447 other is not a template at all. That's OK. */
1449 else if (TREE_CODE (newdecl
) == NAMESPACE_DECL
)
1451 /* In [namespace.alias] we have:
1453 In a declarative region, a namespace-alias-definition can be
1454 used to redefine a namespace-alias declared in that declarative
1455 region to refer only to the namespace to which it already
1458 Therefore, if we encounter a second alias directive for the same
1459 alias, we can just ignore the second directive. */
1460 if (DECL_NAMESPACE_ALIAS (newdecl
)
1461 && (DECL_NAMESPACE_ALIAS (newdecl
)
1462 == DECL_NAMESPACE_ALIAS (olddecl
)))
1464 /* [namespace.alias]
1466 A namespace-name or namespace-alias shall not be declared as
1467 the name of any other entity in the same declarative region.
1468 A namespace-name defined at global scope shall not be
1469 declared as the name of any other entity in any global scope
1471 error ("declaration of namespace %qD conflicts with", newdecl
);
1472 cp_error_at ("previous declaration of namespace %qD here", olddecl
);
1473 return error_mark_node
;
1477 const char *errmsg
= redeclaration_error_message (newdecl
, olddecl
);
1480 error (errmsg
, newdecl
);
1481 if (DECL_NAME (olddecl
) != NULL_TREE
)
1482 cp_error_at ((DECL_INITIAL (olddecl
)
1483 && namespace_bindings_p ())
1484 ? "%q#D previously defined here"
1485 : "%q#D previously declared here", olddecl
);
1486 return error_mark_node
;
1488 else if (TREE_CODE (olddecl
) == FUNCTION_DECL
1489 && DECL_INITIAL (olddecl
) != NULL_TREE
1490 && TYPE_ARG_TYPES (TREE_TYPE (olddecl
)) == NULL_TREE
1491 && TYPE_ARG_TYPES (TREE_TYPE (newdecl
)) != NULL_TREE
)
1493 /* Prototype decl follows defn w/o prototype. */
1494 cp_warning_at ("prototype for %q#D", newdecl
);
1495 warning ("%Jfollows non-prototype definition here", olddecl
);
1497 else if (TREE_CODE (olddecl
) == FUNCTION_DECL
1498 && DECL_LANGUAGE (newdecl
) != DECL_LANGUAGE (olddecl
))
1500 /* extern "C" int foo ();
1501 int foo () { bar (); }
1503 if (current_lang_depth () == 0)
1504 SET_DECL_LANGUAGE (newdecl
, DECL_LANGUAGE (olddecl
));
1507 cp_error_at ("previous declaration of %q#D with %qL linkage",
1508 olddecl
, DECL_LANGUAGE (olddecl
));
1509 error ("conflicts with new declaration with %qL linkage",
1510 DECL_LANGUAGE (newdecl
));
1514 if (DECL_LANG_SPECIFIC (olddecl
) && DECL_USE_TEMPLATE (olddecl
))
1516 else if (TREE_CODE (olddecl
) == FUNCTION_DECL
)
1518 tree t1
= TYPE_ARG_TYPES (TREE_TYPE (olddecl
));
1519 tree t2
= TYPE_ARG_TYPES (TREE_TYPE (newdecl
));
1522 if (TREE_CODE (TREE_TYPE (newdecl
)) == METHOD_TYPE
)
1523 t1
= TREE_CHAIN (t1
), t2
= TREE_CHAIN (t2
);
1525 for (; t1
&& t1
!= void_list_node
;
1526 t1
= TREE_CHAIN (t1
), t2
= TREE_CHAIN (t2
), i
++)
1527 if (TREE_PURPOSE (t1
) && TREE_PURPOSE (t2
))
1529 if (1 == simple_cst_equal (TREE_PURPOSE (t1
),
1532 pedwarn ("default argument given for parameter %d of %q#D",
1534 cp_pedwarn_at ("after previous specification in %q#D",
1539 error ("default argument given for parameter %d of %q#D",
1541 cp_error_at ("after previous specification in %q#D",
1546 if (DECL_DECLARED_INLINE_P (newdecl
)
1547 && ! DECL_DECLARED_INLINE_P (olddecl
)
1548 && TREE_ADDRESSABLE (olddecl
) && warn_inline
)
1550 warning ("%q#D was used before it was declared inline", newdecl
);
1551 warning ("%Jprevious non-inline declaration here", olddecl
);
1556 /* Do not merge an implicit typedef with an explicit one. In:
1560 typedef class A A __attribute__ ((foo));
1562 the attribute should apply only to the typedef. */
1563 if (TREE_CODE (olddecl
) == TYPE_DECL
1564 && (DECL_IMPLICIT_TYPEDEF_P (olddecl
)
1565 || DECL_IMPLICIT_TYPEDEF_P (newdecl
)))
1568 /* If new decl is `static' and an `extern' was seen previously,
1570 warn_extern_redeclared_static (newdecl
, olddecl
);
1572 /* We have committed to returning 1 at this point. */
1573 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1575 /* Now that functions must hold information normally held
1576 by field decls, there is extra work to do so that
1577 declaration information does not get destroyed during
1579 if (DECL_VINDEX (olddecl
))
1580 DECL_VINDEX (newdecl
) = DECL_VINDEX (olddecl
);
1581 if (DECL_CONTEXT (olddecl
))
1582 DECL_CONTEXT (newdecl
) = DECL_CONTEXT (olddecl
);
1583 DECL_STATIC_CONSTRUCTOR (newdecl
) |= DECL_STATIC_CONSTRUCTOR (olddecl
);
1584 DECL_STATIC_DESTRUCTOR (newdecl
) |= DECL_STATIC_DESTRUCTOR (olddecl
);
1585 DECL_PURE_VIRTUAL_P (newdecl
) |= DECL_PURE_VIRTUAL_P (olddecl
);
1586 DECL_VIRTUAL_P (newdecl
) |= DECL_VIRTUAL_P (olddecl
);
1587 DECL_THIS_STATIC (newdecl
) |= DECL_THIS_STATIC (olddecl
);
1588 if (DECL_OVERLOADED_OPERATOR_P (olddecl
) != ERROR_MARK
)
1589 SET_OVERLOADED_OPERATOR_CODE
1590 (newdecl
, DECL_OVERLOADED_OPERATOR_P (olddecl
));
1591 new_defines_function
= DECL_INITIAL (newdecl
) != NULL_TREE
;
1593 /* Optionally warn about more than one declaration for the same
1594 name, but don't warn about a function declaration followed by a
1596 if (warn_redundant_decls
&& ! DECL_ARTIFICIAL (olddecl
)
1597 && !(new_defines_function
&& DECL_INITIAL (olddecl
) == NULL_TREE
)
1598 /* Don't warn about extern decl followed by definition. */
1599 && !(DECL_EXTERNAL (olddecl
) && ! DECL_EXTERNAL (newdecl
))
1600 /* Don't warn about friends, let add_friend take care of it. */
1601 && ! (DECL_FRIEND_P (newdecl
) || DECL_FRIEND_P (olddecl
)))
1603 warning ("redundant redeclaration of %qD in same scope", newdecl
);
1604 cp_warning_at ("previous declaration of %qD", olddecl
);
1608 /* Deal with C++: must preserve virtual function table size. */
1609 if (TREE_CODE (olddecl
) == TYPE_DECL
)
1611 tree newtype
= TREE_TYPE (newdecl
);
1612 tree oldtype
= TREE_TYPE (olddecl
);
1614 if (newtype
!= error_mark_node
&& oldtype
!= error_mark_node
1615 && TYPE_LANG_SPECIFIC (newtype
) && TYPE_LANG_SPECIFIC (oldtype
))
1616 CLASSTYPE_FRIEND_CLASSES (newtype
)
1617 = CLASSTYPE_FRIEND_CLASSES (oldtype
);
1619 DECL_ORIGINAL_TYPE (newdecl
) = DECL_ORIGINAL_TYPE (olddecl
);
1622 /* Copy all the DECL_... slots specified in the new decl
1623 except for any that we copy here from the old type. */
1624 DECL_ATTRIBUTES (newdecl
)
1625 = (*targetm
.merge_decl_attributes
) (olddecl
, newdecl
);
1627 if (TREE_CODE (newdecl
) == TEMPLATE_DECL
)
1629 TREE_TYPE (olddecl
) = TREE_TYPE (DECL_TEMPLATE_RESULT (olddecl
));
1630 DECL_TEMPLATE_SPECIALIZATIONS (olddecl
)
1631 = chainon (DECL_TEMPLATE_SPECIALIZATIONS (olddecl
),
1632 DECL_TEMPLATE_SPECIALIZATIONS (newdecl
));
1634 /* If the new declaration is a definition, update the file and
1635 line information on the declaration. */
1636 if (DECL_INITIAL (DECL_TEMPLATE_RESULT (olddecl
)) == NULL_TREE
1637 && DECL_INITIAL (DECL_TEMPLATE_RESULT (newdecl
)) != NULL_TREE
)
1639 DECL_SOURCE_LOCATION (olddecl
)
1640 = DECL_SOURCE_LOCATION (DECL_TEMPLATE_RESULT (olddecl
))
1641 = DECL_SOURCE_LOCATION (newdecl
);
1642 if (DECL_FUNCTION_TEMPLATE_P (newdecl
))
1643 DECL_ARGUMENTS (DECL_TEMPLATE_RESULT (olddecl
))
1644 = DECL_ARGUMENTS (DECL_TEMPLATE_RESULT (newdecl
));
1647 if (DECL_FUNCTION_TEMPLATE_P (newdecl
))
1649 DECL_INLINE (DECL_TEMPLATE_RESULT (olddecl
))
1650 |= DECL_INLINE (DECL_TEMPLATE_RESULT (newdecl
));
1651 DECL_DECLARED_INLINE_P (DECL_TEMPLATE_RESULT (olddecl
))
1652 |= DECL_DECLARED_INLINE_P (DECL_TEMPLATE_RESULT (newdecl
));
1660 /* Automatically handles default parameters. */
1661 tree oldtype
= TREE_TYPE (olddecl
);
1664 /* Merge the data types specified in the two decls. */
1665 newtype
= merge_types (TREE_TYPE (newdecl
), TREE_TYPE (olddecl
));
1667 /* If merge_types produces a non-typedef type, just use the old type. */
1668 if (TREE_CODE (newdecl
) == TYPE_DECL
1669 && newtype
== DECL_ORIGINAL_TYPE (newdecl
))
1672 if (TREE_CODE (newdecl
) == VAR_DECL
)
1674 DECL_THIS_EXTERN (newdecl
) |= DECL_THIS_EXTERN (olddecl
);
1675 DECL_INITIALIZED_P (newdecl
) |= DECL_INITIALIZED_P (olddecl
);
1676 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (newdecl
)
1677 |= DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (olddecl
);
1680 /* Do this after calling `merge_types' so that default
1681 parameters don't confuse us. */
1682 else if (TREE_CODE (newdecl
) == FUNCTION_DECL
1683 && (TYPE_RAISES_EXCEPTIONS (TREE_TYPE (newdecl
))
1684 != TYPE_RAISES_EXCEPTIONS (TREE_TYPE (olddecl
))))
1686 TREE_TYPE (newdecl
) = build_exception_variant (newtype
,
1687 TYPE_RAISES_EXCEPTIONS (TREE_TYPE (newdecl
)));
1688 TREE_TYPE (olddecl
) = build_exception_variant (newtype
,
1689 TYPE_RAISES_EXCEPTIONS (oldtype
));
1691 if ((pedantic
|| ! DECL_IN_SYSTEM_HEADER (olddecl
))
1692 && ! DECL_IS_BUILTIN (olddecl
)
1694 && !comp_except_specs (TYPE_RAISES_EXCEPTIONS (TREE_TYPE (newdecl
)),
1695 TYPE_RAISES_EXCEPTIONS (TREE_TYPE (olddecl
)), 1))
1697 error ("declaration of %qF throws different exceptions",
1699 cp_error_at ("than previous declaration %qF", olddecl
);
1702 TREE_TYPE (newdecl
) = TREE_TYPE (olddecl
) = newtype
;
1704 /* Lay the type out, unless already done. */
1705 if (! same_type_p (newtype
, oldtype
)
1706 && TREE_TYPE (newdecl
) != error_mark_node
1707 && !(processing_template_decl
&& uses_template_parms (newdecl
)))
1708 layout_type (TREE_TYPE (newdecl
));
1710 if ((TREE_CODE (newdecl
) == VAR_DECL
1711 || TREE_CODE (newdecl
) == PARM_DECL
1712 || TREE_CODE (newdecl
) == RESULT_DECL
1713 || TREE_CODE (newdecl
) == FIELD_DECL
1714 || TREE_CODE (newdecl
) == TYPE_DECL
)
1715 && !(processing_template_decl
&& uses_template_parms (newdecl
)))
1716 layout_decl (newdecl
, 0);
1718 /* Merge the type qualifiers. */
1719 if (TREE_READONLY (newdecl
))
1720 TREE_READONLY (olddecl
) = 1;
1721 if (TREE_THIS_VOLATILE (newdecl
))
1722 TREE_THIS_VOLATILE (olddecl
) = 1;
1723 if (TREE_NOTHROW (newdecl
))
1724 TREE_NOTHROW (olddecl
) = 1;
1726 /* Merge deprecatedness. */
1727 if (TREE_DEPRECATED (newdecl
))
1728 TREE_DEPRECATED (olddecl
) = 1;
1730 /* Merge the initialization information. */
1731 if (DECL_INITIAL (newdecl
) == NULL_TREE
1732 && DECL_INITIAL (olddecl
) != NULL_TREE
)
1734 DECL_INITIAL (newdecl
) = DECL_INITIAL (olddecl
);
1735 DECL_SOURCE_LOCATION (newdecl
) = DECL_SOURCE_LOCATION (olddecl
);
1736 if (CAN_HAVE_FULL_LANG_DECL_P (newdecl
)
1737 && DECL_LANG_SPECIFIC (newdecl
)
1738 && DECL_LANG_SPECIFIC (olddecl
))
1740 DECL_SAVED_TREE (newdecl
) = DECL_SAVED_TREE (olddecl
);
1741 DECL_STRUCT_FUNCTION (newdecl
) = DECL_STRUCT_FUNCTION (olddecl
);
1745 /* Merge the section attribute.
1746 We want to issue an error if the sections conflict but that must be
1747 done later in decl_attributes since we are called before attributes
1749 if (DECL_SECTION_NAME (newdecl
) == NULL_TREE
)
1750 DECL_SECTION_NAME (newdecl
) = DECL_SECTION_NAME (olddecl
);
1752 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1754 DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (newdecl
)
1755 |= DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (olddecl
);
1756 DECL_NO_LIMIT_STACK (newdecl
) |= DECL_NO_LIMIT_STACK (olddecl
);
1757 TREE_THIS_VOLATILE (newdecl
) |= TREE_THIS_VOLATILE (olddecl
);
1758 TREE_READONLY (newdecl
) |= TREE_READONLY (olddecl
);
1759 TREE_NOTHROW (newdecl
) |= TREE_NOTHROW (olddecl
);
1760 DECL_IS_MALLOC (newdecl
) |= DECL_IS_MALLOC (olddecl
);
1761 DECL_IS_PURE (newdecl
) |= DECL_IS_PURE (olddecl
);
1762 /* Keep the old RTL. */
1763 COPY_DECL_RTL (olddecl
, newdecl
);
1765 else if (TREE_CODE (newdecl
) == VAR_DECL
1766 && (DECL_SIZE (olddecl
) || !DECL_SIZE (newdecl
)))
1768 /* Keep the old RTL. We cannot keep the old RTL if the old
1769 declaration was for an incomplete object and the new
1770 declaration is not since many attributes of the RTL will
1772 COPY_DECL_RTL (olddecl
, newdecl
);
1775 /* If cannot merge, then use the new type and qualifiers,
1776 and don't preserve the old rtl. */
1779 /* Clean out any memory we had of the old declaration. */
1780 tree oldstatic
= value_member (olddecl
, static_aggregates
);
1782 TREE_VALUE (oldstatic
) = error_mark_node
;
1784 TREE_TYPE (olddecl
) = TREE_TYPE (newdecl
);
1785 TREE_READONLY (olddecl
) = TREE_READONLY (newdecl
);
1786 TREE_THIS_VOLATILE (olddecl
) = TREE_THIS_VOLATILE (newdecl
);
1787 TREE_SIDE_EFFECTS (olddecl
) = TREE_SIDE_EFFECTS (newdecl
);
1790 /* Merge the storage class information. */
1791 merge_weak (newdecl
, olddecl
);
1793 DECL_ONE_ONLY (newdecl
) |= DECL_ONE_ONLY (olddecl
);
1794 DECL_DEFER_OUTPUT (newdecl
) |= DECL_DEFER_OUTPUT (olddecl
);
1795 TREE_PUBLIC (newdecl
) = TREE_PUBLIC (olddecl
);
1796 TREE_STATIC (olddecl
) = TREE_STATIC (newdecl
) |= TREE_STATIC (olddecl
);
1797 if (! DECL_EXTERNAL (olddecl
))
1798 DECL_EXTERNAL (newdecl
) = 0;
1800 if (DECL_LANG_SPECIFIC (newdecl
) && DECL_LANG_SPECIFIC (olddecl
))
1802 DECL_INTERFACE_KNOWN (newdecl
) |= DECL_INTERFACE_KNOWN (olddecl
);
1803 DECL_NOT_REALLY_EXTERN (newdecl
) |= DECL_NOT_REALLY_EXTERN (olddecl
);
1804 DECL_COMDAT (newdecl
) |= DECL_COMDAT (olddecl
);
1805 DECL_TEMPLATE_INSTANTIATED (newdecl
)
1806 |= DECL_TEMPLATE_INSTANTIATED (olddecl
);
1807 /* Don't really know how much of the language-specific
1808 values we should copy from old to new. */
1809 DECL_IN_AGGR_P (newdecl
) = DECL_IN_AGGR_P (olddecl
);
1810 DECL_LANG_SPECIFIC (newdecl
)->decl_flags
.u2
=
1811 DECL_LANG_SPECIFIC (olddecl
)->decl_flags
.u2
;
1812 DECL_NONCONVERTING_P (newdecl
) = DECL_NONCONVERTING_P (olddecl
);
1813 DECL_REPO_AVAILABLE_P (newdecl
) = DECL_REPO_AVAILABLE_P (olddecl
);
1814 DECL_TEMPLATE_INFO (newdecl
) = DECL_TEMPLATE_INFO (olddecl
);
1815 DECL_INITIALIZED_IN_CLASS_P (newdecl
)
1816 |= DECL_INITIALIZED_IN_CLASS_P (olddecl
);
1817 olddecl_friend
= DECL_FRIEND_P (olddecl
);
1819 /* Only functions have DECL_BEFRIENDING_CLASSES. */
1820 if (TREE_CODE (newdecl
) == FUNCTION_DECL
1821 || DECL_FUNCTION_TEMPLATE_P (newdecl
))
1823 DECL_BEFRIENDING_CLASSES (newdecl
)
1824 = chainon (DECL_BEFRIENDING_CLASSES (newdecl
),
1825 DECL_BEFRIENDING_CLASSES (olddecl
));
1826 /* DECL_THUNKS is only valid for virtual functions,
1827 otherwise it is a DECL_FRIEND_CONTEXT. */
1828 if (DECL_VIRTUAL_P (newdecl
))
1829 DECL_THUNKS (newdecl
) = DECL_THUNKS (olddecl
);
1833 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1835 if (DECL_TEMPLATE_INSTANTIATION (olddecl
)
1836 && !DECL_TEMPLATE_INSTANTIATION (newdecl
))
1838 /* If newdecl is not a specialization, then it is not a
1839 template-related function at all. And that means that we
1840 should have exited above, returning 0. */
1841 gcc_assert (DECL_TEMPLATE_SPECIALIZATION (newdecl
));
1843 if (TREE_USED (olddecl
))
1844 /* From [temp.expl.spec]:
1846 If a template, a member template or the member of a class
1847 template is explicitly specialized then that
1848 specialization shall be declared before the first use of
1849 that specialization that would cause an implicit
1850 instantiation to take place, in every translation unit in
1851 which such a use occurs. */
1852 error ("explicit specialization of %qD after first use",
1855 SET_DECL_TEMPLATE_SPECIALIZATION (olddecl
);
1857 /* [temp.expl.spec/14] We don't inline explicit specialization
1858 just because the primary template says so. */
1862 if (DECL_PENDING_INLINE_INFO (newdecl
) == 0)
1863 DECL_PENDING_INLINE_INFO (newdecl
) = DECL_PENDING_INLINE_INFO (olddecl
);
1865 DECL_DECLARED_INLINE_P (newdecl
) |= DECL_DECLARED_INLINE_P (olddecl
);
1867 /* If either decl says `inline', this fn is inline, unless
1868 its definition was passed already. */
1869 if (DECL_INLINE (newdecl
) && DECL_INITIAL (olddecl
) == NULL_TREE
)
1870 DECL_INLINE (olddecl
) = 1;
1871 DECL_INLINE (newdecl
) = DECL_INLINE (olddecl
);
1873 DECL_UNINLINABLE (newdecl
) = DECL_UNINLINABLE (olddecl
)
1874 = (DECL_UNINLINABLE (newdecl
) || DECL_UNINLINABLE (olddecl
));
1877 /* Preserve abstractness on cloned [cd]tors. */
1878 DECL_ABSTRACT (newdecl
) = DECL_ABSTRACT (olddecl
);
1882 SET_DECL_LANGUAGE (olddecl
, DECL_LANGUAGE (newdecl
));
1883 COPY_DECL_ASSEMBLER_NAME (newdecl
, olddecl
);
1884 COPY_DECL_RTL (newdecl
, olddecl
);
1886 if (! types_match
|| new_defines_function
)
1888 /* These need to be copied so that the names are available.
1889 Note that if the types do match, we'll preserve inline
1890 info and other bits, but if not, we won't. */
1891 DECL_ARGUMENTS (olddecl
) = DECL_ARGUMENTS (newdecl
);
1892 DECL_RESULT (olddecl
) = DECL_RESULT (newdecl
);
1894 if (new_defines_function
)
1895 /* If defining a function declared with other language
1896 linkage, use the previously declared language linkage. */
1897 SET_DECL_LANGUAGE (newdecl
, DECL_LANGUAGE (olddecl
));
1898 else if (types_match
)
1900 /* If redeclaring a builtin function, and not a definition,
1901 it stays built in. */
1902 if (DECL_BUILT_IN (olddecl
))
1904 DECL_BUILT_IN_CLASS (newdecl
) = DECL_BUILT_IN_CLASS (olddecl
);
1905 DECL_FUNCTION_CODE (newdecl
) = DECL_FUNCTION_CODE (olddecl
);
1906 /* If we're keeping the built-in definition, keep the rtl,
1907 regardless of declaration matches. */
1908 COPY_DECL_RTL (olddecl
, newdecl
);
1911 DECL_RESULT (newdecl
) = DECL_RESULT (olddecl
);
1912 /* Don't clear out the arguments if we're redefining a function. */
1913 if (DECL_ARGUMENTS (olddecl
))
1914 DECL_ARGUMENTS (newdecl
) = DECL_ARGUMENTS (olddecl
);
1917 else if (TREE_CODE (newdecl
) == NAMESPACE_DECL
)
1918 NAMESPACE_LEVEL (newdecl
) = NAMESPACE_LEVEL (olddecl
);
1920 /* Now preserve various other info from the definition. */
1921 TREE_ADDRESSABLE (newdecl
) = TREE_ADDRESSABLE (olddecl
);
1922 TREE_ASM_WRITTEN (newdecl
) = TREE_ASM_WRITTEN (olddecl
);
1923 DECL_COMMON (newdecl
) = DECL_COMMON (olddecl
);
1924 COPY_DECL_ASSEMBLER_NAME (olddecl
, newdecl
);
1926 /* Warn about conflicting visibility specifications. */
1927 if (DECL_VISIBILITY_SPECIFIED (olddecl
)
1928 && DECL_VISIBILITY_SPECIFIED (newdecl
)
1929 && DECL_VISIBILITY (newdecl
) != DECL_VISIBILITY (olddecl
))
1931 warning ("%J%qD: visibility attribute ignored because it",
1933 warning ("%Jconflicts with previous declaration here", olddecl
);
1935 /* Choose the declaration which specified visibility. */
1936 if (DECL_VISIBILITY_SPECIFIED (olddecl
))
1938 DECL_VISIBILITY (newdecl
) = DECL_VISIBILITY (olddecl
);
1939 DECL_VISIBILITY_SPECIFIED (newdecl
) = 1;
1942 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1946 function_size
= sizeof (struct tree_decl
);
1948 memcpy ((char *) olddecl
+ sizeof (struct tree_common
),
1949 (char *) newdecl
+ sizeof (struct tree_common
),
1950 function_size
- sizeof (struct tree_common
));
1952 if (DECL_TEMPLATE_INSTANTIATION (newdecl
))
1953 /* If newdecl is a template instantiation, it is possible that
1954 the following sequence of events has occurred:
1956 o A friend function was declared in a class template. The
1957 class template was instantiated.
1959 o The instantiation of the friend declaration was
1960 recorded on the instantiation list, and is newdecl.
1962 o Later, however, instantiate_class_template called pushdecl
1963 on the newdecl to perform name injection. But, pushdecl in
1964 turn called duplicate_decls when it discovered that another
1965 declaration of a global function with the same name already
1968 o Here, in duplicate_decls, we decided to clobber newdecl.
1970 If we're going to do that, we'd better make sure that
1971 olddecl, and not newdecl, is on the list of
1972 instantiations so that if we try to do the instantiation
1973 again we won't get the clobbered declaration. */
1974 reregister_specialization (newdecl
,
1975 DECL_TI_TEMPLATE (newdecl
),
1980 memcpy ((char *) olddecl
+ sizeof (struct tree_common
),
1981 (char *) newdecl
+ sizeof (struct tree_common
),
1982 sizeof (struct tree_decl
) - sizeof (struct tree_common
)
1983 + TREE_CODE_LENGTH (TREE_CODE (newdecl
)) * sizeof (char *));
1986 DECL_UID (olddecl
) = olddecl_uid
;
1988 DECL_FRIEND_P (olddecl
) = 1;
1990 /* NEWDECL contains the merged attribute lists.
1991 Update OLDDECL to be the same. */
1992 DECL_ATTRIBUTES (olddecl
) = DECL_ATTRIBUTES (newdecl
);
1994 /* If OLDDECL had its DECL_RTL instantiated, re-invoke make_decl_rtl
1995 so that encode_section_info has a chance to look at the new decl
1996 flags and attributes. */
1997 if (DECL_RTL_SET_P (olddecl
)
1998 && (TREE_CODE (olddecl
) == FUNCTION_DECL
1999 || (TREE_CODE (olddecl
) == VAR_DECL
2000 && TREE_STATIC (olddecl
))))
2001 make_decl_rtl (olddecl
);
2006 /* Return zero if the declaration NEWDECL is valid
2007 when the declaration OLDDECL (assumed to be for the same name)
2008 has already been seen.
2009 Otherwise return an error message format string with a %s
2010 where the identifier should go. */
2013 redeclaration_error_message (tree newdecl
, tree olddecl
)
2015 if (TREE_CODE (newdecl
) == TYPE_DECL
)
2017 /* Because C++ can put things into name space for free,
2018 constructs like "typedef struct foo { ... } foo"
2019 would look like an erroneous redeclaration. */
2020 if (same_type_p (TREE_TYPE (newdecl
), TREE_TYPE (olddecl
)))
2023 return "redefinition of %q#D";
2025 else if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
2027 /* If this is a pure function, its olddecl will actually be
2028 the original initialization to `0' (which we force to call
2029 abort()). Don't complain about redefinition in this case. */
2030 if (DECL_LANG_SPECIFIC (olddecl
) && DECL_PURE_VIRTUAL_P (olddecl
))
2033 /* If both functions come from different namespaces, this is not
2034 a redeclaration - this is a conflict with a used function. */
2035 if (DECL_NAMESPACE_SCOPE_P (olddecl
)
2036 && DECL_CONTEXT (olddecl
) != DECL_CONTEXT (newdecl
))
2037 return "%qD conflicts with used function";
2039 /* We'll complain about linkage mismatches in
2040 warn_extern_redeclared_static. */
2042 /* Defining the same name twice is no good. */
2043 if (DECL_INITIAL (olddecl
) != NULL_TREE
2044 && DECL_INITIAL (newdecl
) != NULL_TREE
)
2046 if (DECL_NAME (olddecl
) == NULL_TREE
)
2047 return "%q#D not declared in class";
2049 return "redefinition of %q#D";
2053 else if (TREE_CODE (newdecl
) == TEMPLATE_DECL
)
2057 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) == TYPE_DECL
)
2059 if (COMPLETE_TYPE_P (TREE_TYPE (newdecl
))
2060 && COMPLETE_TYPE_P (TREE_TYPE (olddecl
)))
2061 return "redefinition of %q#D";
2065 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) != FUNCTION_DECL
2066 || (DECL_TEMPLATE_RESULT (newdecl
)
2067 == DECL_TEMPLATE_RESULT (olddecl
)))
2070 nt
= DECL_TEMPLATE_RESULT (newdecl
);
2071 if (DECL_TEMPLATE_INFO (nt
))
2072 nt
= DECL_TEMPLATE_RESULT (template_for_substitution (nt
));
2073 ot
= DECL_TEMPLATE_RESULT (olddecl
);
2074 if (DECL_TEMPLATE_INFO (ot
))
2075 ot
= DECL_TEMPLATE_RESULT (template_for_substitution (ot
));
2076 if (DECL_INITIAL (nt
) && DECL_INITIAL (ot
))
2077 return "redefinition of %q#D";
2081 else if (toplevel_bindings_p () || DECL_NAMESPACE_SCOPE_P (newdecl
))
2083 /* Objects declared at top level: */
2084 /* If at least one is a reference, it's ok. */
2085 if (DECL_EXTERNAL (newdecl
) || DECL_EXTERNAL (olddecl
))
2087 /* Reject two definitions. */
2088 return "redefinition of %q#D";
2092 /* Objects declared with block scope: */
2093 /* Reject two definitions, and reject a definition
2094 together with an external reference. */
2095 if (!(DECL_EXTERNAL (newdecl
) && DECL_EXTERNAL (olddecl
)))
2096 return "redeclaration of %q#D";
2101 /* Create a new label, named ID. */
2104 make_label_decl (tree id
, int local_p
)
2108 decl
= build_decl (LABEL_DECL
, id
, void_type_node
);
2110 DECL_CONTEXT (decl
) = current_function_decl
;
2111 DECL_MODE (decl
) = VOIDmode
;
2112 C_DECLARED_LABEL_FLAG (decl
) = local_p
;
2114 /* Say where one reference is to the label, for the sake of the
2115 error if it is not defined. */
2116 DECL_SOURCE_LOCATION (decl
) = input_location
;
2118 /* Record the fact that this identifier is bound to this label. */
2119 SET_IDENTIFIER_LABEL_VALUE (id
, decl
);
2124 /* Record this label on the list of used labels so that we can check
2125 at the end of the function to see whether or not the label was
2126 actually defined, and so we can check when the label is defined whether
2127 this use is valid. */
2130 use_label (tree decl
)
2132 if (named_label_uses
== NULL
2133 || named_label_uses
->names_in_scope
!= current_binding_level
->names
2134 || named_label_uses
->label_decl
!= decl
)
2136 struct named_label_use_list
*new_ent
;
2137 new_ent
= GGC_NEW (struct named_label_use_list
);
2138 new_ent
->label_decl
= decl
;
2139 new_ent
->names_in_scope
= current_binding_level
->names
;
2140 new_ent
->binding_level
= current_binding_level
;
2141 new_ent
->o_goto_locus
= input_location
;
2142 new_ent
->next
= named_label_uses
;
2143 named_label_uses
= new_ent
;
2147 /* Look for a label named ID in the current function. If one cannot
2148 be found, create one. (We keep track of used, but undefined,
2149 labels, and complain about them at the end of a function.) */
2152 lookup_label (tree id
)
2155 struct named_label_list
*ent
;
2157 timevar_push (TV_NAME_LOOKUP
);
2158 /* You can't use labels at global scope. */
2159 if (current_function_decl
== NULL_TREE
)
2161 error ("label %qE referenced outside of any function", id
);
2162 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP
, NULL_TREE
);
2165 /* See if we've already got this label. */
2166 decl
= IDENTIFIER_LABEL_VALUE (id
);
2167 if (decl
!= NULL_TREE
&& DECL_CONTEXT (decl
) == current_function_decl
)
2168 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP
, decl
);
2170 /* Record this label on the list of labels used in this function.
2171 We do this before calling make_label_decl so that we get the
2172 IDENTIFIER_LABEL_VALUE before the new label is declared. */
2173 ent
= GGC_CNEW (struct named_label_list
);
2174 ent
->old_value
= IDENTIFIER_LABEL_VALUE (id
);
2175 ent
->next
= named_labels
;
2178 /* We need a new label. */
2179 decl
= make_label_decl (id
, /*local_p=*/0);
2181 /* Now fill in the information we didn't have before. */
2182 ent
->label_decl
= decl
;
2184 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP
, decl
);
2187 /* Declare a local label named ID. */
2190 declare_local_label (tree id
)
2194 /* Add a new entry to the SHADOWED_LABELS list so that when we leave
2195 this scope we can restore the old value of
2196 IDENTIFIER_TYPE_VALUE. */
2197 current_binding_level
->shadowed_labels
2198 = tree_cons (IDENTIFIER_LABEL_VALUE (id
), NULL_TREE
,
2199 current_binding_level
->shadowed_labels
);
2200 /* Look for the label. */
2201 decl
= make_label_decl (id
, /*local_p=*/1);
2202 /* Now fill in the information we didn't have before. */
2203 TREE_VALUE (current_binding_level
->shadowed_labels
) = decl
;
2208 /* Returns nonzero if it is ill-formed to jump past the declaration of
2209 DECL. Returns 2 if it's also a real problem. */
2212 decl_jump_unsafe (tree decl
)
2214 if (TREE_CODE (decl
) != VAR_DECL
|| TREE_STATIC (decl
))
2217 if (DECL_INITIAL (decl
) == NULL_TREE
2218 && pod_type_p (TREE_TYPE (decl
)))
2221 /* This is really only important if we're crossing an initialization.
2222 The POD stuff is just pedantry; why should it matter if the class
2223 contains a field of pointer to member type? */
2224 if (DECL_INITIAL (decl
)
2225 || (TYPE_NEEDS_CONSTRUCTING (TREE_TYPE (decl
))))
2230 /* Check that a single previously seen jump to a newly defined label
2231 is OK. DECL is the LABEL_DECL or 0; LEVEL is the binding_level for
2232 the jump context; NAMES are the names in scope in LEVEL at the jump
2233 context; FILE and LINE are the source position of the jump or 0. */
2236 check_previous_goto_1 (tree decl
,
2237 struct cp_binding_level
* level
,
2238 tree names
, const location_t
*locus
)
2242 struct cp_binding_level
*b
= current_binding_level
;
2243 for (; b
; b
= b
->level_chain
)
2245 tree new_decls
= b
->names
;
2246 tree old_decls
= (b
== level
? names
: NULL_TREE
);
2247 for (; new_decls
!= old_decls
;
2248 new_decls
= TREE_CHAIN (new_decls
))
2250 int problem
= decl_jump_unsafe (new_decls
);
2257 pedwarn ("jump to label %qD", decl
);
2259 pedwarn ("jump to case label");
2262 pedwarn ("%H from here", locus
);
2267 cp_error_at (" crosses initialization of %q#D",
2270 cp_pedwarn_at (" enters scope of non-POD %q#D",
2276 if ((b
->kind
== sk_try
|| b
->kind
== sk_catch
) && ! saw_eh
)
2281 pedwarn ("jump to label %qD", decl
);
2283 pedwarn ("jump to case label");
2286 pedwarn ("%H from here", locus
);
2289 if (b
->kind
== sk_try
)
2290 error (" enters try block");
2292 error (" enters catch block");
2299 check_previous_goto (struct named_label_use_list
* use
)
2301 check_previous_goto_1 (use
->label_decl
, use
->binding_level
,
2302 use
->names_in_scope
, &use
->o_goto_locus
);
2306 check_switch_goto (struct cp_binding_level
* level
)
2308 check_previous_goto_1 (NULL_TREE
, level
, level
->names
, NULL
);
2311 /* Check that any previously seen jumps to a newly defined label DECL
2312 are OK. Called by define_label. */
2315 check_previous_gotos (tree decl
)
2317 struct named_label_use_list
**usep
;
2319 if (! TREE_USED (decl
))
2322 for (usep
= &named_label_uses
; *usep
; )
2324 struct named_label_use_list
*use
= *usep
;
2325 if (use
->label_decl
== decl
)
2327 check_previous_goto (use
);
2331 usep
= &(use
->next
);
2335 /* Check that a new jump to a label DECL is OK. Called by
2336 finish_goto_stmt. */
2339 check_goto (tree decl
)
2343 struct named_label_list
*lab
;
2345 /* We can't know where a computed goto is jumping. So we assume
2347 if (! DECL_P (decl
))
2350 /* If the label hasn't been defined yet, defer checking. */
2351 if (! DECL_INITIAL (decl
))
2357 for (lab
= named_labels
; lab
; lab
= lab
->next
)
2358 if (decl
== lab
->label_decl
)
2361 /* If the label is not on named_labels it's a gcc local label, so
2362 it must be in an outer scope, so jumping to it is always OK. */
2366 if ((lab
->in_try_scope
|| lab
->in_catch_scope
|| lab
->bad_decls
)
2369 cp_pedwarn_at ("jump to label %qD", decl
);
2370 pedwarn (" from here");
2374 for (bad
= lab
->bad_decls
; bad
; bad
= TREE_CHAIN (bad
))
2376 tree b
= TREE_VALUE (bad
);
2377 int u
= decl_jump_unsafe (b
);
2379 if (u
> 1 && DECL_ARTIFICIAL (b
))
2380 /* Can't skip init of __exception_info. */
2381 error ("%J enters catch block", b
);
2383 cp_error_at (" skips initialization of %q#D", b
);
2385 cp_pedwarn_at (" enters scope of non-POD %q#D", b
);
2388 if (lab
->in_try_scope
)
2389 error (" enters try block");
2390 else if (lab
->in_catch_scope
)
2391 error (" enters catch block");
2394 /* Define a label, specifying the location in the source file.
2395 Return the LABEL_DECL node for the label. */
2398 define_label (location_t location
, tree name
)
2400 tree decl
= lookup_label (name
);
2401 struct named_label_list
*ent
;
2402 struct cp_binding_level
*p
;
2404 timevar_push (TV_NAME_LOOKUP
);
2405 for (ent
= named_labels
; ent
; ent
= ent
->next
)
2406 if (ent
->label_decl
== decl
)
2409 /* After labels, make any new cleanups in the function go into their
2410 own new (temporary) binding contour. */
2411 for (p
= current_binding_level
;
2412 p
->kind
!= sk_function_parms
;
2414 p
->more_cleanups_ok
= 0;
2416 if (name
== get_identifier ("wchar_t"))
2417 pedwarn ("label named wchar_t");
2419 if (DECL_INITIAL (decl
) != NULL_TREE
)
2420 error ("duplicate label %qD", decl
);
2423 /* Mark label as having been defined. */
2424 DECL_INITIAL (decl
) = error_mark_node
;
2425 /* Say where in the source. */
2426 DECL_SOURCE_LOCATION (decl
) = location
;
2429 ent
->names_in_scope
= current_binding_level
->names
;
2430 ent
->binding_level
= current_binding_level
;
2432 check_previous_gotos (decl
);
2435 timevar_pop (TV_NAME_LOOKUP
);
2441 struct cp_binding_level
*level
;
2442 struct cp_switch
*next
;
2443 /* The SWITCH_STMT being built. */
2445 /* A splay-tree mapping the low element of a case range to the high
2446 element, or NULL_TREE if there is no high element. Used to
2447 determine whether or not a new case label duplicates an old case
2448 label. We need a tree, rather than simply a hash table, because
2449 of the GNU case range extension. */
2453 /* A stack of the currently active switch statements. The innermost
2454 switch statement is on the top of the stack. There is no need to
2455 mark the stack for garbage collection because it is only active
2456 during the processing of the body of a function, and we never
2457 collect at that point. */
2459 static struct cp_switch
*switch_stack
;
2461 /* Called right after a switch-statement condition is parsed.
2462 SWITCH_STMT is the switch statement being parsed. */
2465 push_switch (tree switch_stmt
)
2467 struct cp_switch
*p
= xmalloc (sizeof (struct cp_switch
));
2468 p
->level
= current_binding_level
;
2469 p
->next
= switch_stack
;
2470 p
->switch_stmt
= switch_stmt
;
2471 p
->cases
= splay_tree_new (case_compare
, NULL
, NULL
);
2478 struct cp_switch
*cs
= switch_stack
;
2480 /* Emit warnings as needed. */
2481 c_do_switch_warnings (cs
->cases
, cs
->switch_stmt
);
2483 splay_tree_delete (cs
->cases
);
2484 switch_stack
= switch_stack
->next
;
2488 /* Note that we've seen a definition of a case label, and complain if this
2489 is a bad place for one. */
2492 finish_case_label (tree low_value
, tree high_value
)
2495 struct cp_binding_level
*p
;
2497 if (processing_template_decl
)
2501 /* For templates, just add the case label; we'll do semantic
2502 analysis at instantiation-time. */
2503 label
= build_decl (LABEL_DECL
, NULL_TREE
, NULL_TREE
);
2504 return add_stmt (build_case_label (low_value
, high_value
, label
));
2507 /* Find the condition on which this switch statement depends. */
2508 cond
= SWITCH_COND (switch_stack
->switch_stmt
);
2509 if (cond
&& TREE_CODE (cond
) == TREE_LIST
)
2510 cond
= TREE_VALUE (cond
);
2512 r
= c_add_case_label (switch_stack
->cases
, cond
, TREE_TYPE (cond
),
2513 low_value
, high_value
);
2515 check_switch_goto (switch_stack
->level
);
2517 /* After labels, make any new cleanups in the function go into their
2518 own new (temporary) binding contour. */
2519 for (p
= current_binding_level
;
2520 p
->kind
!= sk_function_parms
;
2522 p
->more_cleanups_ok
= 0;
2527 /* Hash a TYPENAME_TYPE. K is really of type `tree'. */
2530 typename_hash (const void* k
)
2535 hash
= (htab_hash_pointer (TYPE_CONTEXT (t
))
2536 ^ htab_hash_pointer (DECL_NAME (TYPE_NAME (t
))));
2541 /* Compare two TYPENAME_TYPEs. K1 and K2 are really of type `tree'. */
2544 typename_compare (const void * k1
, const void * k2
)
2553 d1
= TYPE_NAME (t1
);
2554 d2
= TYPE_NAME (t2
);
2556 return (DECL_NAME (d1
) == DECL_NAME (d2
)
2557 && TYPE_CONTEXT (t1
) == TYPE_CONTEXT (t2
)
2558 && ((TREE_TYPE (t1
) != NULL_TREE
)
2559 == (TREE_TYPE (t2
) != NULL_TREE
))
2560 && same_type_p (TREE_TYPE (t1
), TREE_TYPE (t2
))
2561 && TYPENAME_TYPE_FULLNAME (t1
) == TYPENAME_TYPE_FULLNAME (t2
));
2564 /* Build a TYPENAME_TYPE. If the type is `typename T::t', CONTEXT is
2565 the type of `T', NAME is the IDENTIFIER_NODE for `t'. If BASE_TYPE
2566 is non-NULL, this type is being created by the implicit typename
2567 extension, and BASE_TYPE is a type named `t' in some base class of
2568 `T' which depends on template parameters.
2570 Returns the new TYPENAME_TYPE. */
2572 static GTY ((param_is (union tree_node
))) htab_t typename_htab
;
2575 build_typename_type (tree context
, tree name
, tree fullname
)
2581 if (typename_htab
== NULL
)
2583 typename_htab
= htab_create_ggc (61, &typename_hash
,
2584 &typename_compare
, NULL
);
2587 /* Build the TYPENAME_TYPE. */
2588 t
= make_aggr_type (TYPENAME_TYPE
);
2589 TYPE_CONTEXT (t
) = FROB_CONTEXT (context
);
2590 TYPENAME_TYPE_FULLNAME (t
) = fullname
;
2592 /* Build the corresponding TYPE_DECL. */
2593 d
= build_decl (TYPE_DECL
, name
, t
);
2594 TYPE_NAME (TREE_TYPE (d
)) = d
;
2595 TYPE_STUB_DECL (TREE_TYPE (d
)) = d
;
2596 DECL_CONTEXT (d
) = FROB_CONTEXT (context
);
2597 DECL_ARTIFICIAL (d
) = 1;
2599 /* See if we already have this type. */
2600 e
= htab_find_slot (typename_htab
, t
, INSERT
);
2609 /* Resolve `typename CONTEXT::NAME'. Returns an appropriate type,
2610 unless an error occurs, in which case error_mark_node is returned.
2611 If we locate a non-artificial TYPE_DECL and TF_KEEP_TYPE_DECL is
2612 set, we return that, rather than the _TYPE it corresponds to, in
2613 other cases we look through the type decl. If TF_ERROR is set,
2614 complain about errors, otherwise be quiet. */
2617 make_typename_type (tree context
, tree name
, tsubst_flags_t complain
)
2621 if (name
== error_mark_node
2622 || context
== NULL_TREE
2623 || context
== error_mark_node
)
2624 return error_mark_node
;
2628 if (!(TYPE_LANG_SPECIFIC (name
)
2629 && (CLASSTYPE_IS_TEMPLATE (name
)
2630 || CLASSTYPE_USE_TEMPLATE (name
))))
2631 name
= TYPE_IDENTIFIER (name
);
2633 /* Create a TEMPLATE_ID_EXPR for the type. */
2634 name
= build_nt (TEMPLATE_ID_EXPR
,
2635 CLASSTYPE_TI_TEMPLATE (name
),
2636 CLASSTYPE_TI_ARGS (name
));
2638 else if (TREE_CODE (name
) == TYPE_DECL
)
2639 name
= DECL_NAME (name
);
2643 if (TREE_CODE (name
) == TEMPLATE_ID_EXPR
)
2645 name
= TREE_OPERAND (name
, 0);
2646 if (TREE_CODE (name
) == TEMPLATE_DECL
)
2647 name
= TREE_OPERAND (fullname
, 0) = DECL_NAME (name
);
2649 if (TREE_CODE (name
) == TEMPLATE_DECL
)
2651 error ("%qD used without template parameters", name
);
2652 return error_mark_node
;
2654 gcc_assert (TREE_CODE (name
) == IDENTIFIER_NODE
);
2656 if (TREE_CODE (context
) == NAMESPACE_DECL
)
2658 /* We can get here from typename_sub0 in the explicit_template_type
2659 expansion. Just fail. */
2660 if (complain
& tf_error
)
2661 error ("no class template named %q#T in %q#T", name
, context
);
2662 return error_mark_node
;
2665 if (!dependent_type_p (context
)
2666 || currently_open_class (context
))
2668 if (TREE_CODE (fullname
) == TEMPLATE_ID_EXPR
)
2670 tree tmpl
= NULL_TREE
;
2671 if (IS_AGGR_TYPE (context
))
2672 tmpl
= lookup_field (context
, name
, 0, false);
2673 if (!tmpl
|| !DECL_CLASS_TEMPLATE_P (tmpl
))
2675 if (complain
& tf_error
)
2676 error ("no class template named %q#T in %q#T",
2678 return error_mark_node
;
2681 if (complain
& tf_error
)
2682 perform_or_defer_access_check (TYPE_BINFO (context
), tmpl
);
2684 return lookup_template_class (tmpl
,
2685 TREE_OPERAND (fullname
, 1),
2687 /*entering_scope=*/0,
2688 tf_error
| tf_warning
| tf_user
);
2694 if (!IS_AGGR_TYPE (context
))
2696 if (complain
& tf_error
)
2697 error ("no type named %q#T in %q#T", name
, context
);
2698 return error_mark_node
;
2701 t
= lookup_field (context
, name
, 0, true);
2704 if (TREE_CODE (t
) != TYPE_DECL
)
2706 if (complain
& tf_error
)
2707 error ("no type named %q#T in %q#T", name
, context
);
2708 return error_mark_node
;
2711 if (complain
& tf_error
)
2712 perform_or_defer_access_check (TYPE_BINFO (context
), t
);
2714 if (DECL_ARTIFICIAL (t
) || !(complain
& tf_keep_type_decl
))
2722 /* If the CONTEXT is not a template type, then either the field is
2723 there now or its never going to be. */
2724 if (!dependent_type_p (context
))
2726 if (complain
& tf_error
)
2727 error ("no type named %q#T in %q#T", name
, context
);
2728 return error_mark_node
;
2731 return build_typename_type (context
, name
, fullname
);
2734 /* Resolve `CONTEXT::template NAME'. Returns a TEMPLATE_DECL if the name
2735 can be resolved or an UNBOUND_CLASS_TEMPLATE, unless an error occurs,
2736 in which case error_mark_node is returned.
2738 If PARM_LIST is non-NULL, also make sure that the template parameter
2739 list of TEMPLATE_DECL matches.
2741 If COMPLAIN zero, don't complain about any errors that occur. */
2744 make_unbound_class_template (tree context
, tree name
, tree parm_list
,
2745 tsubst_flags_t complain
)
2751 name
= TYPE_IDENTIFIER (name
);
2752 else if (DECL_P (name
))
2753 name
= DECL_NAME (name
);
2754 gcc_assert (TREE_CODE (name
) == IDENTIFIER_NODE
);
2756 if (!dependent_type_p (context
)
2757 || currently_open_class (context
))
2759 tree tmpl
= NULL_TREE
;
2761 if (IS_AGGR_TYPE (context
))
2762 tmpl
= lookup_field (context
, name
, 0, false);
2764 if (!tmpl
|| !DECL_CLASS_TEMPLATE_P (tmpl
))
2766 if (complain
& tf_error
)
2767 error ("no class template named %q#T in %q#T", name
, context
);
2768 return error_mark_node
;
2772 && !comp_template_parms (DECL_TEMPLATE_PARMS (tmpl
), parm_list
))
2774 if (complain
& tf_error
)
2776 error ("template parameters do not match template");
2777 cp_error_at ("%qD declared here", tmpl
);
2779 return error_mark_node
;
2782 if (complain
& tf_error
)
2783 perform_or_defer_access_check (TYPE_BINFO (context
), tmpl
);
2788 /* Build the UNBOUND_CLASS_TEMPLATE. */
2789 t
= make_aggr_type (UNBOUND_CLASS_TEMPLATE
);
2790 TYPE_CONTEXT (t
) = FROB_CONTEXT (context
);
2791 TREE_TYPE (t
) = NULL_TREE
;
2793 /* Build the corresponding TEMPLATE_DECL. */
2794 d
= build_decl (TEMPLATE_DECL
, name
, t
);
2795 TYPE_NAME (TREE_TYPE (d
)) = d
;
2796 TYPE_STUB_DECL (TREE_TYPE (d
)) = d
;
2797 DECL_CONTEXT (d
) = FROB_CONTEXT (context
);
2798 DECL_ARTIFICIAL (d
) = 1;
2799 DECL_TEMPLATE_PARMS (d
) = parm_list
;
2806 /* Push the declarations of builtin types into the namespace.
2807 RID_INDEX is the index of the builtin type in the array
2808 RID_POINTERS. NAME is the name used when looking up the builtin
2809 type. TYPE is the _TYPE node for the builtin type. */
2812 record_builtin_type (enum rid rid_index
,
2816 tree rname
= NULL_TREE
, tname
= NULL_TREE
;
2817 tree tdecl
= NULL_TREE
;
2819 if ((int) rid_index
< (int) RID_MAX
)
2820 rname
= ridpointers
[(int) rid_index
];
2822 tname
= get_identifier (name
);
2824 /* The calls to SET_IDENTIFIER_GLOBAL_VALUE below should be
2825 eliminated. Built-in types should not be looked up name; their
2826 names are keywords that the parser can recognize. However, there
2827 is code in c-common.c that uses identifier_global_value to look
2828 up built-in types by name. */
2831 tdecl
= build_decl (TYPE_DECL
, tname
, type
);
2832 DECL_ARTIFICIAL (tdecl
) = 1;
2833 SET_IDENTIFIER_GLOBAL_VALUE (tname
, tdecl
);
2839 tdecl
= build_decl (TYPE_DECL
, rname
, type
);
2840 DECL_ARTIFICIAL (tdecl
) = 1;
2842 SET_IDENTIFIER_GLOBAL_VALUE (rname
, tdecl
);
2845 if (!TYPE_NAME (type
))
2846 TYPE_NAME (type
) = tdecl
;
2849 debug_hooks
->type_decl (tdecl
, 0);
2852 /* Record one of the standard Java types.
2853 * Declare it as having the given NAME.
2854 * If SIZE > 0, it is the size of one of the integral types;
2855 * otherwise it is the negative of the size of one of the other types. */
2858 record_builtin_java_type (const char* name
, int size
)
2862 type
= make_signed_type (size
);
2863 else if (size
> -32)
2864 { /* "__java_char" or ""__java_boolean". */
2865 type
= make_unsigned_type (-size
);
2866 /*if (size == -1) TREE_SET_CODE (type, BOOLEAN_TYPE);*/
2869 { /* "__java_float" or ""__java_double". */
2870 type
= make_node (REAL_TYPE
);
2871 TYPE_PRECISION (type
) = - size
;
2874 record_builtin_type (RID_MAX
, name
, type
);
2875 decl
= TYPE_NAME (type
);
2877 /* Suppress generate debug symbol entries for these types,
2878 since for normal C++ they are just clutter.
2879 However, push_lang_context undoes this if extern "Java" is seen. */
2880 DECL_IGNORED_P (decl
) = 1;
2882 TYPE_FOR_JAVA (type
) = 1;
2886 /* Push a type into the namespace so that the back-ends ignore it. */
2889 record_unknown_type (tree type
, const char* name
)
2891 tree decl
= pushdecl (build_decl (TYPE_DECL
, get_identifier (name
), type
));
2892 /* Make sure the "unknown type" typedecl gets ignored for debug info. */
2893 DECL_IGNORED_P (decl
) = 1;
2894 TYPE_DECL_SUPPRESS_DEBUG (decl
) = 1;
2895 TYPE_SIZE (type
) = TYPE_SIZE (void_type_node
);
2896 TYPE_ALIGN (type
) = 1;
2897 TYPE_USER_ALIGN (type
) = 0;
2898 TYPE_MODE (type
) = TYPE_MODE (void_type_node
);
2901 /* An string for which we should create an IDENTIFIER_NODE at
2904 typedef struct predefined_identifier
2906 /* The name of the identifier. */
2907 const char *const name
;
2908 /* The place where the IDENTIFIER_NODE should be stored. */
2910 /* Nonzero if this is the name of a constructor or destructor. */
2911 const int ctor_or_dtor_p
;
2912 } predefined_identifier
;
2914 /* Create all the predefined identifiers. */
2917 initialize_predefined_identifiers (void)
2919 const predefined_identifier
*pid
;
2921 /* A table of identifiers to create at startup. */
2922 static const predefined_identifier predefined_identifiers
[] = {
2923 { "C++", &lang_name_cplusplus
, 0 },
2924 { "C", &lang_name_c
, 0 },
2925 { "Java", &lang_name_java
, 0 },
2926 { CTOR_NAME
, &ctor_identifier
, 1 },
2927 { "__base_ctor", &base_ctor_identifier
, 1 },
2928 { "__comp_ctor", &complete_ctor_identifier
, 1 },
2929 { DTOR_NAME
, &dtor_identifier
, 1 },
2930 { "__comp_dtor", &complete_dtor_identifier
, 1 },
2931 { "__base_dtor", &base_dtor_identifier
, 1 },
2932 { "__deleting_dtor", &deleting_dtor_identifier
, 1 },
2933 { IN_CHARGE_NAME
, &in_charge_identifier
, 0 },
2934 { "nelts", &nelts_identifier
, 0 },
2935 { THIS_NAME
, &this_identifier
, 0 },
2936 { VTABLE_DELTA_NAME
, &delta_identifier
, 0 },
2937 { VTABLE_PFN_NAME
, &pfn_identifier
, 0 },
2938 { "_vptr", &vptr_identifier
, 0 },
2939 { "__vtt_parm", &vtt_parm_identifier
, 0 },
2940 { "::", &global_scope_name
, 0 },
2941 { "std", &std_identifier
, 0 },
2945 for (pid
= predefined_identifiers
; pid
->name
; ++pid
)
2947 *pid
->node
= get_identifier (pid
->name
);
2948 if (pid
->ctor_or_dtor_p
)
2949 IDENTIFIER_CTOR_OR_DTOR_P (*pid
->node
) = 1;
2953 /* Create the predefined scalar types of C,
2954 and some nodes representing standard constants (0, 1, (void *)0).
2955 Initialize the global binding level.
2956 Make definitions for built-in primitive functions. */
2959 cxx_init_decl_processing (void)
2962 tree void_ftype_ptr
;
2964 build_common_tree_nodes (flag_signed_char
, false);
2966 /* Create all the identifiers we need. */
2967 initialize_predefined_identifiers ();
2969 /* Create the global variables. */
2970 push_to_top_level ();
2972 current_function_decl
= NULL_TREE
;
2973 current_binding_level
= NULL
;
2974 /* Enter the global namespace. */
2975 gcc_assert (global_namespace
== NULL_TREE
);
2976 global_namespace
= build_lang_decl (NAMESPACE_DECL
, global_scope_name
,
2978 begin_scope (sk_namespace
, global_namespace
);
2980 current_lang_name
= NULL_TREE
;
2982 /* Adjust various flags based on command-line settings. */
2983 if (!flag_permissive
)
2984 flag_pedantic_errors
= 1;
2985 if (!flag_no_inline
)
2987 flag_inline_trees
= 1;
2990 if (flag_inline_functions
)
2992 flag_inline_trees
= 2;
2993 flag_inline_functions
= 0;
2996 /* Force minimum function alignment if using the least significant
2997 bit of function pointers to store the virtual bit. */
2998 if (TARGET_PTRMEMFUNC_VBIT_LOCATION
== ptrmemfunc_vbit_in_pfn
2999 && force_align_functions_log
< 1)
3000 force_align_functions_log
= 1;
3003 current_lang_name
= lang_name_c
;
3005 error_mark_list
= build_tree_list (error_mark_node
, error_mark_node
);
3006 TREE_TYPE (error_mark_list
) = error_mark_node
;
3008 /* Create the `std' namespace. */
3009 push_namespace (std_identifier
);
3010 std_node
= current_namespace
;
3013 c_common_nodes_and_builtins ();
3015 java_byte_type_node
= record_builtin_java_type ("__java_byte", 8);
3016 java_short_type_node
= record_builtin_java_type ("__java_short", 16);
3017 java_int_type_node
= record_builtin_java_type ("__java_int", 32);
3018 java_long_type_node
= record_builtin_java_type ("__java_long", 64);
3019 java_float_type_node
= record_builtin_java_type ("__java_float", -32);
3020 java_double_type_node
= record_builtin_java_type ("__java_double", -64);
3021 java_char_type_node
= record_builtin_java_type ("__java_char", -16);
3022 java_boolean_type_node
= record_builtin_java_type ("__java_boolean", -1);
3024 integer_two_node
= build_int_cst (NULL_TREE
, 2);
3025 integer_three_node
= build_int_cst (NULL_TREE
, 3);
3027 record_builtin_type (RID_BOOL
, "bool", boolean_type_node
);
3028 truthvalue_type_node
= boolean_type_node
;
3029 truthvalue_false_node
= boolean_false_node
;
3030 truthvalue_true_node
= boolean_true_node
;
3032 empty_except_spec
= build_tree_list (NULL_TREE
, NULL_TREE
);
3035 record_builtin_type (RID_MAX
, NULL
, string_type_node
);
3038 delta_type_node
= ptrdiff_type_node
;
3039 vtable_index_type
= ptrdiff_type_node
;
3041 vtt_parm_type
= build_pointer_type (const_ptr_type_node
);
3042 void_ftype
= build_function_type (void_type_node
, void_list_node
);
3043 void_ftype_ptr
= build_function_type (void_type_node
,
3044 tree_cons (NULL_TREE
,
3048 = build_exception_variant (void_ftype_ptr
, empty_except_spec
);
3050 /* C++ extensions */
3052 unknown_type_node
= make_node (UNKNOWN_TYPE
);
3053 record_unknown_type (unknown_type_node
, "unknown type");
3055 /* Indirecting an UNKNOWN_TYPE node yields an UNKNOWN_TYPE node. */
3056 TREE_TYPE (unknown_type_node
) = unknown_type_node
;
3058 /* Looking up TYPE_POINTER_TO and TYPE_REFERENCE_TO yield the same
3060 TYPE_POINTER_TO (unknown_type_node
) = unknown_type_node
;
3061 TYPE_REFERENCE_TO (unknown_type_node
) = unknown_type_node
;
3064 /* Make sure we get a unique function type, so we can give
3065 its pointer type a name. (This wins for gdb.) */
3066 tree vfunc_type
= make_node (FUNCTION_TYPE
);
3067 TREE_TYPE (vfunc_type
) = integer_type_node
;
3068 TYPE_ARG_TYPES (vfunc_type
) = NULL_TREE
;
3069 layout_type (vfunc_type
);
3071 vtable_entry_type
= build_pointer_type (vfunc_type
);
3073 record_builtin_type (RID_MAX
, VTBL_PTR_TYPE
, vtable_entry_type
);
3076 = build_cplus_array_type (vtable_entry_type
, NULL_TREE
);
3077 layout_type (vtbl_type_node
);
3078 vtbl_type_node
= build_qualified_type (vtbl_type_node
, TYPE_QUAL_CONST
);
3079 record_builtin_type (RID_MAX
, NULL
, vtbl_type_node
);
3080 vtbl_ptr_type_node
= build_pointer_type (vtable_entry_type
);
3081 layout_type (vtbl_ptr_type_node
);
3082 record_builtin_type (RID_MAX
, NULL
, vtbl_ptr_type_node
);
3084 push_namespace (get_identifier ("__cxxabiv1"));
3085 abi_node
= current_namespace
;
3088 global_type_node
= make_node (LANG_TYPE
);
3089 record_unknown_type (global_type_node
, "global type");
3092 current_lang_name
= lang_name_cplusplus
;
3096 tree bad_alloc_type_node
;
3097 tree bad_alloc_decl
;
3098 tree newtype
, deltype
;
3099 tree ptr_ftype_sizetype
;
3101 push_namespace (std_identifier
);
3102 bad_alloc_id
= get_identifier ("bad_alloc");
3103 bad_alloc_type_node
= make_aggr_type (RECORD_TYPE
);
3104 TYPE_CONTEXT (bad_alloc_type_node
) = current_namespace
;
3106 = create_implicit_typedef (bad_alloc_id
, bad_alloc_type_node
);
3107 DECL_CONTEXT (bad_alloc_decl
) = current_namespace
;
3108 TYPE_STUB_DECL (bad_alloc_type_node
) = bad_alloc_decl
;
3112 = build_function_type (ptr_type_node
,
3113 tree_cons (NULL_TREE
,
3116 newtype
= build_exception_variant
3117 (ptr_ftype_sizetype
, add_exception_specifier
3118 (NULL_TREE
, bad_alloc_type_node
, -1));
3119 deltype
= build_exception_variant (void_ftype_ptr
, empty_except_spec
);
3120 push_cp_library_fn (NEW_EXPR
, newtype
);
3121 push_cp_library_fn (VEC_NEW_EXPR
, newtype
);
3122 global_delete_fndecl
= push_cp_library_fn (DELETE_EXPR
, deltype
);
3123 push_cp_library_fn (VEC_DELETE_EXPR
, deltype
);
3127 = build_library_fn_ptr ("__cxa_pure_virtual", void_ftype
);
3129 /* Perform other language dependent initializations. */
3130 init_class_processing ();
3131 init_rtti_processing ();
3133 if (flag_exceptions
)
3134 init_exception_processing ();
3136 if (! supports_one_only ())
3139 make_fname_decl
= cp_make_fname_decl
;
3140 start_fname_decls ();
3142 /* Show we use EH for cleanups. */
3143 if (flag_exceptions
)
3144 using_eh_for_cleanups ();
3147 /* Generate an initializer for a function naming variable from
3148 NAME. NAME may be NULL, to indicate a dependent name. TYPE_P is
3149 filled in with the type of the init. */
3152 cp_fname_init (const char* name
, tree
*type_p
)
3154 tree domain
= NULL_TREE
;
3156 tree init
= NULL_TREE
;
3161 length
= strlen (name
);
3162 domain
= build_index_type (size_int (length
));
3163 init
= build_string (length
+ 1, name
);
3166 type
= build_qualified_type (char_type_node
, TYPE_QUAL_CONST
);
3167 type
= build_cplus_array_type (type
, domain
);
3172 TREE_TYPE (init
) = type
;
3174 init
= error_mark_node
;
3179 /* Create the VAR_DECL for __FUNCTION__ etc. ID is the name to give the
3180 decl, NAME is the initialization string and TYPE_DEP indicates whether
3181 NAME depended on the type of the function. We make use of that to detect
3182 __PRETTY_FUNCTION__ inside a template fn. This is being done
3183 lazily at the point of first use, so we mustn't push the decl now. */
3186 cp_make_fname_decl (tree id
, int type_dep
)
3188 const char *const name
= (type_dep
&& processing_template_decl
3189 ? NULL
: fname_as_string (type_dep
));
3191 tree init
= cp_fname_init (name
, &type
);
3192 tree decl
= build_decl (VAR_DECL
, id
, type
);
3195 free ((char *) name
);
3197 /* As we're using pushdecl_with_scope, we must set the context. */
3198 DECL_CONTEXT (decl
) = current_function_decl
;
3199 DECL_PRETTY_FUNCTION_P (decl
) = type_dep
;
3201 TREE_STATIC (decl
) = 1;
3202 TREE_READONLY (decl
) = 1;
3203 DECL_ARTIFICIAL (decl
) = 1;
3204 DECL_INITIAL (decl
) = init
;
3206 TREE_USED (decl
) = 1;
3208 if (current_function_decl
)
3210 struct cp_binding_level
*b
= current_binding_level
;
3211 while (b
->level_chain
->kind
!= sk_function_parms
)
3213 pushdecl_with_scope (decl
, b
);
3214 cp_finish_decl (decl
, init
, NULL_TREE
, LOOKUP_ONLYCONVERTING
);
3217 pushdecl_top_level_and_finish (decl
, init
);
3222 /* Make a definition for a builtin function named NAME in the current
3223 namespace, whose data type is TYPE and whose context is CONTEXT.
3224 TYPE should be a function type with argument types.
3226 CLASS and CODE tell later passes how to compile calls to this function.
3227 See tree.h for possible values.
3229 If LIBNAME is nonzero, use that for DECL_ASSEMBLER_NAME,
3230 the name to be called if we can't opencode the function.
3231 If ATTRS is nonzero, use that for the function's attribute
3235 builtin_function_1 (const char* name
,
3238 enum built_in_function code
,
3239 enum built_in_class
class,
3240 const char* libname
,
3243 tree decl
= build_library_fn_1 (get_identifier (name
), ERROR_MARK
, type
);
3244 DECL_BUILT_IN_CLASS (decl
) = class;
3245 DECL_FUNCTION_CODE (decl
) = code
;
3246 DECL_CONTEXT (decl
) = context
;
3250 /* Since `pushdecl' relies on DECL_ASSEMBLER_NAME instead of DECL_NAME,
3251 we cannot change DECL_ASSEMBLER_NAME until we have installed this
3252 function in the namespace. */
3254 SET_DECL_ASSEMBLER_NAME (decl
, get_identifier (libname
));
3256 /* Warn if a function in the namespace for users
3257 is used without an occasion to consider it declared. */
3258 if (name
[0] != '_' || name
[1] != '_')
3259 DECL_ANTICIPATED (decl
) = 1;
3261 /* Possibly apply some default attributes to this built-in function. */
3263 decl_attributes (&decl
, attrs
, ATTR_FLAG_BUILT_IN
);
3265 decl_attributes (&decl
, NULL_TREE
, 0);
3270 /* Entry point for the benefit of c_common_nodes_and_builtins.
3272 Make a definition for a builtin function named NAME and whose data type
3273 is TYPE. TYPE should be a function type with argument types. This
3274 function places the anticipated declaration in the global namespace
3275 and additionally in the std namespace if appropriate.
3277 CLASS and CODE tell later passes how to compile calls to this function.
3278 See tree.h for possible values.
3280 If LIBNAME is nonzero, use that for DECL_ASSEMBLER_NAME,
3281 the name to be called if we can't opencode the function.
3283 If ATTRS is nonzero, use that for the function's attribute
3287 builtin_function (const char* name
,
3290 enum built_in_class cl
,
3291 const char* libname
,
3294 /* All builtins that don't begin with an '_' should additionally
3295 go in the 'std' namespace. */
3298 push_namespace (std_identifier
);
3299 builtin_function_1 (name
, type
, std_node
, code
, cl
, libname
, attrs
);
3303 return builtin_function_1 (name
, type
, NULL_TREE
, code
,
3304 cl
, libname
, attrs
);
3307 /* Generate a FUNCTION_DECL with the typical flags for a runtime library
3308 function. Not called directly. */
3311 build_library_fn_1 (tree name
, enum tree_code operator_code
, tree type
)
3313 tree fn
= build_lang_decl (FUNCTION_DECL
, name
, type
);
3314 DECL_EXTERNAL (fn
) = 1;
3315 TREE_PUBLIC (fn
) = 1;
3316 DECL_ARTIFICIAL (fn
) = 1;
3317 TREE_NOTHROW (fn
) = 1;
3318 SET_OVERLOADED_OPERATOR_CODE (fn
, operator_code
);
3319 SET_DECL_LANGUAGE (fn
, lang_c
);
3320 /* Runtime library routines are, by definition, available in an
3321 external shared object. */
3322 DECL_VISIBILITY (fn
) = VISIBILITY_DEFAULT
;
3323 DECL_VISIBILITY_SPECIFIED (fn
) = 1;
3327 /* Returns the _DECL for a library function with C linkage.
3328 We assume that such functions never throw; if this is incorrect,
3329 callers should unset TREE_NOTHROW. */
3332 build_library_fn (tree name
, tree type
)
3334 return build_library_fn_1 (name
, ERROR_MARK
, type
);
3337 /* Returns the _DECL for a library function with C++ linkage. */
3340 build_cp_library_fn (tree name
, enum tree_code operator_code
, tree type
)
3342 tree fn
= build_library_fn_1 (name
, operator_code
, type
);
3343 TREE_NOTHROW (fn
) = TYPE_NOTHROW_P (type
);
3344 DECL_CONTEXT (fn
) = FROB_CONTEXT (current_namespace
);
3345 SET_DECL_LANGUAGE (fn
, lang_cplusplus
);
3349 /* Like build_library_fn, but takes a C string instead of an
3353 build_library_fn_ptr (const char* name
, tree type
)
3355 return build_library_fn (get_identifier (name
), type
);
3358 /* Like build_cp_library_fn, but takes a C string instead of an
3362 build_cp_library_fn_ptr (const char* name
, tree type
)
3364 return build_cp_library_fn (get_identifier (name
), ERROR_MARK
, type
);
3367 /* Like build_library_fn, but also pushes the function so that we will
3368 be able to find it via IDENTIFIER_GLOBAL_VALUE. */
3371 push_library_fn (tree name
, tree type
)
3373 tree fn
= build_library_fn (name
, type
);
3374 pushdecl_top_level (fn
);
3378 /* Like build_cp_library_fn, but also pushes the function so that it
3379 will be found by normal lookup. */
3382 push_cp_library_fn (enum tree_code operator_code
, tree type
)
3384 tree fn
= build_cp_library_fn (ansi_opname (operator_code
),
3391 /* Like push_library_fn, but takes a TREE_LIST of parm types rather than
3395 push_void_library_fn (tree name
, tree parmtypes
)
3397 tree type
= build_function_type (void_type_node
, parmtypes
);
3398 return push_library_fn (name
, type
);
3401 /* Like push_library_fn, but also note that this function throws
3402 and does not return. Used for __throw_foo and the like. */
3405 push_throw_library_fn (tree name
, tree type
)
3407 tree fn
= push_library_fn (name
, type
);
3408 TREE_THIS_VOLATILE (fn
) = 1;
3409 TREE_NOTHROW (fn
) = 0;
3413 /* When we call finish_struct for an anonymous union, we create
3414 default copy constructors and such. But, an anonymous union
3415 shouldn't have such things; this function undoes the damage to the
3416 anonymous union type T.
3418 (The reason that we create the synthesized methods is that we don't
3419 distinguish `union { int i; }' from `typedef union { int i; } U'.
3420 The first is an anonymous union; the second is just an ordinary
3424 fixup_anonymous_aggr (tree t
)
3428 /* Wipe out memory of synthesized methods. */
3429 TYPE_HAS_CONSTRUCTOR (t
) = 0;
3430 TYPE_HAS_DEFAULT_CONSTRUCTOR (t
) = 0;
3431 TYPE_HAS_INIT_REF (t
) = 0;
3432 TYPE_HAS_CONST_INIT_REF (t
) = 0;
3433 TYPE_HAS_ASSIGN_REF (t
) = 0;
3434 TYPE_HAS_CONST_ASSIGN_REF (t
) = 0;
3436 /* Splice the implicitly generated functions out of the TYPE_METHODS
3438 q
= &TYPE_METHODS (t
);
3441 if (DECL_ARTIFICIAL (*q
))
3442 *q
= TREE_CHAIN (*q
);
3444 q
= &TREE_CHAIN (*q
);
3447 /* ISO C++ 9.5.3. Anonymous unions may not have function members. */
3448 if (TYPE_METHODS (t
))
3449 error ("%Jan anonymous union cannot have function members",
3450 TYPE_MAIN_DECL (t
));
3452 /* Anonymous aggregates cannot have fields with ctors, dtors or complex
3453 assignment operators (because they cannot have these methods themselves).
3454 For anonymous unions this is already checked because they are not allowed
3455 in any union, otherwise we have to check it. */
3456 if (TREE_CODE (t
) != UNION_TYPE
)
3460 for (field
= TYPE_FIELDS (t
); field
; field
= TREE_CHAIN (field
))
3461 if (TREE_CODE (field
) == FIELD_DECL
)
3463 type
= TREE_TYPE (field
);
3464 if (CLASS_TYPE_P (type
))
3466 if (TYPE_NEEDS_CONSTRUCTING (type
))
3467 cp_error_at ("member %q#D with constructor not allowed "
3468 "in anonymous aggregate",
3470 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type
))
3471 cp_error_at ("member %q#D with destructor not allowed "
3472 "in anonymous aggregate",
3474 if (TYPE_HAS_COMPLEX_ASSIGN_REF (type
))
3475 cp_error_at ("member %q#D with copy assignment operator "
3476 "not allowed in anonymous aggregate",
3483 /* Make sure that a declaration with no declarator is well-formed, i.e.
3484 just declares a tagged type or anonymous union.
3486 Returns the type declared; or NULL_TREE if none. */
3489 check_tag_decl (cp_decl_specifier_seq
*declspecs
)
3491 int saw_friend
= declspecs
->specs
[(int)ds_friend
] != 0;
3492 int saw_typedef
= declspecs
->specs
[(int)ds_typedef
] != 0;
3493 /* If a class, struct, or enum type is declared by the DECLSPECS
3494 (i.e, if a class-specifier, enum-specifier, or non-typename
3495 elaborated-type-specifier appears in the DECLSPECS),
3496 DECLARED_TYPE is set to the corresponding type. */
3497 tree declared_type
= NULL_TREE
;
3498 bool error_p
= false;
3500 if (declspecs
->multiple_types_p
)
3501 error ("multiple types in one declaration");
3502 else if (declspecs
->redefined_builtin_type
)
3504 if (!in_system_header
)
3505 pedwarn ("redeclaration of C++ built-in type %qT",
3506 declspecs
->redefined_builtin_type
);
3510 if (TYPE_P (declspecs
->type
)
3511 && ((TREE_CODE (declspecs
->type
) != TYPENAME_TYPE
3512 && IS_AGGR_TYPE (declspecs
->type
))
3513 || TREE_CODE (declspecs
->type
) == ENUMERAL_TYPE
))
3514 declared_type
= declspecs
->type
;
3515 else if (declspecs
->type
== error_mark_node
)
3517 if (declared_type
== NULL_TREE
&& ! saw_friend
&& !error_p
)
3518 pedwarn ("declaration does not declare anything");
3519 /* Check for an anonymous union. */
3520 else if (declared_type
&& IS_AGGR_TYPE_CODE (TREE_CODE (declared_type
))
3521 && TYPE_ANONYMOUS_P (declared_type
))
3523 /* 7/3 In a simple-declaration, the optional init-declarator-list
3524 can be omitted only when declaring a class (clause 9) or
3525 enumeration (7.2), that is, when the decl-specifier-seq contains
3526 either a class-specifier, an elaborated-type-specifier with
3527 a class-key (9.1), or an enum-specifier. In these cases and
3528 whenever a class-specifier or enum-specifier is present in the
3529 decl-specifier-seq, the identifiers in these specifiers are among
3530 the names being declared by the declaration (as class-name,
3531 enum-names, or enumerators, depending on the syntax). In such
3532 cases, and except for the declaration of an unnamed bit-field (9.6),
3533 the decl-specifier-seq shall introduce one or more names into the
3534 program, or shall redeclare a name introduced by a previous
3535 declaration. [Example:
3536 enum { }; // ill-formed
3537 typedef class { }; // ill-formed
3541 error ("missing type-name in typedef-declaration");
3544 /* Anonymous unions are objects, so they can have specifiers. */;
3545 SET_ANON_AGGR_TYPE_P (declared_type
);
3547 if (TREE_CODE (declared_type
) != UNION_TYPE
&& pedantic
3548 && !in_system_header
)
3549 pedwarn ("ISO C++ prohibits anonymous structs");
3554 if (declspecs
->specs
[(int)ds_inline
]
3555 || declspecs
->specs
[(int)ds_virtual
])
3556 error ("%qs can only be specified for functions",
3557 declspecs
->specs
[(int)ds_inline
]
3558 ? "inline" : "virtual");
3560 && (!current_class_type
3561 || current_scope () != current_class_type
))
3562 error ("%<friend%> can only be specified inside a class");
3563 else if (declspecs
->specs
[(int)ds_explicit
])
3564 error ("%<explicit%> can only be specified for constructors");
3565 else if (declspecs
->storage_class
)
3566 error ("a storage class can only be specified for objects "
3568 else if (declspecs
->specs
[(int)ds_const
]
3569 || declspecs
->specs
[(int)ds_volatile
]
3570 || declspecs
->specs
[(int)ds_restrict
]
3571 || declspecs
->specs
[(int)ds_thread
])
3572 error ("qualifiers can only be specified for objects "
3576 return declared_type
;
3579 /* Called when a declaration is seen that contains no names to declare.
3580 If its type is a reference to a structure, union or enum inherited
3581 from a containing scope, shadow that tag name for the current scope
3582 with a forward reference.
3583 If its type defines a new named structure or union
3584 or defines an enum, it is valid but we need not do anything here.
3585 Otherwise, it is an error.
3587 C++: may have to grok the declspecs to learn about static,
3588 complain for anonymous unions.
3590 Returns the TYPE declared -- or NULL_TREE if none. */
3593 shadow_tag (cp_decl_specifier_seq
*declspecs
)
3595 tree t
= check_tag_decl (declspecs
);
3600 if (declspecs
->attributes
)
3602 cp_warning_at ("attribute ignored in declaration of %q#T", t
);
3603 cp_warning_at ("attribute for %q#T must follow the %qs keyword",
3605 class_key_or_enum_as_string (t
));
3609 maybe_process_partial_specialization (t
);
3611 /* This is where the variables in an anonymous union are
3612 declared. An anonymous union declaration looks like:
3614 because there is no declarator after the union, the parser
3615 sends that declaration here. */
3616 if (ANON_AGGR_TYPE_P (t
))
3618 fixup_anonymous_aggr (t
);
3620 if (TYPE_FIELDS (t
))
3622 tree decl
= grokdeclarator (/*declarator=*/NULL
,
3623 declspecs
, NORMAL
, 0, NULL
);
3624 finish_anon_union (decl
);
3631 /* Decode a "typename", such as "int **", returning a ..._TYPE node. */
3634 groktypename (cp_decl_specifier_seq
*type_specifiers
,
3635 const cp_declarator
*declarator
)
3639 attrs
= type_specifiers
->attributes
;
3640 type_specifiers
->attributes
= NULL_TREE
;
3641 type
= grokdeclarator (declarator
, type_specifiers
, TYPENAME
, 0, &attrs
);
3643 cplus_decl_attributes (&type
, attrs
, 0);
3647 /* Decode a declarator in an ordinary declaration or data definition.
3648 This is called as soon as the type information and variable name
3649 have been parsed, before parsing the initializer if any.
3650 Here we create the ..._DECL node, fill in its type,
3651 and put it on the list of decls for the current context.
3652 The ..._DECL node is returned as the value.
3654 Exception: for arrays where the length is not specified,
3655 the type is left null, to be filled in by `cp_finish_decl'.
3657 Function definitions do not come here; they go to start_function
3658 instead. However, external and forward declarations of functions
3659 do go through here. Structure field declarations are done by
3660 grokfield and not through here. */
3663 start_decl (const cp_declarator
*declarator
,
3664 cp_decl_specifier_seq
*declspecs
,
3667 tree prefix_attributes
,
3674 *pop_scope_p
= false;
3676 /* This should only be done once on the top most decl. */
3677 if (have_extern_spec
)
3679 declspecs
->storage_class
= sc_extern
;
3680 have_extern_spec
= false;
3683 /* An object declared as __attribute__((deprecated)) suppresses
3684 warnings of uses of other deprecated items. */
3685 if (lookup_attribute ("deprecated", attributes
))
3686 deprecated_state
= DEPRECATED_SUPPRESS
;
3688 attributes
= chainon (attributes
, prefix_attributes
);
3690 decl
= grokdeclarator (declarator
, declspecs
, NORMAL
, initialized
,
3693 deprecated_state
= DEPRECATED_NORMAL
;
3695 if (decl
== NULL_TREE
|| TREE_CODE (decl
) == VOID_TYPE
)
3696 return error_mark_node
;
3698 type
= TREE_TYPE (decl
);
3700 if (type
== error_mark_node
)
3701 return error_mark_node
;
3703 context
= DECL_CONTEXT (decl
);
3706 *pop_scope_p
= push_scope (context
);
3708 /* We are only interested in class contexts, later. */
3709 if (context
&& TREE_CODE (context
) == NAMESPACE_DECL
)
3710 context
= NULL_TREE
;
3713 /* Is it valid for this decl to have an initializer at all?
3714 If not, set INITIALIZED to zero, which will indirectly
3715 tell `cp_finish_decl' to ignore the initializer once it is parsed. */
3716 switch (TREE_CODE (decl
))
3719 error ("typedef %qD is initialized (use __typeof__ instead)", decl
);
3724 error ("function %q#D is initialized like a variable", decl
);
3734 if (! toplevel_bindings_p ()
3735 && DECL_EXTERNAL (decl
))
3736 warning ("declaration of %q#D has %<extern%> and is initialized",
3738 DECL_EXTERNAL (decl
) = 0;
3739 if (toplevel_bindings_p ())
3740 TREE_STATIC (decl
) = 1;
3742 /* Tell `pushdecl' this is an initialized decl
3743 even though we don't yet have the initializer expression.
3744 Also tell `cp_finish_decl' it may store the real initializer. */
3745 DECL_INITIAL (decl
) = error_mark_node
;
3748 /* Set attributes here so if duplicate decl, will have proper attributes. */
3749 cplus_decl_attributes (&decl
, attributes
, 0);
3751 /* If #pragma weak was used, mark the decl weak now. */
3752 if (global_scope_p (current_binding_level
))
3753 maybe_apply_pragma_weak (decl
);
3755 if (TREE_CODE (decl
) == FUNCTION_DECL
3756 && DECL_DECLARED_INLINE_P (decl
)
3757 && DECL_UNINLINABLE (decl
)
3758 && lookup_attribute ("noinline", DECL_ATTRIBUTES (decl
)))
3759 warning ("%Jinline function %qD given attribute noinline", decl
, decl
);
3761 if (context
&& COMPLETE_TYPE_P (complete_type (context
)))
3763 if (TREE_CODE (decl
) == VAR_DECL
)
3765 tree field
= lookup_field (context
, DECL_NAME (decl
), 0, false);
3766 if (field
== NULL_TREE
|| TREE_CODE (field
) != VAR_DECL
)
3767 error ("%q#D is not a static member of %q#T", decl
, context
);
3770 if (DECL_CONTEXT (field
) != context
)
3772 if (!same_type_p (DECL_CONTEXT (field
), context
))
3773 pedwarn ("ISO C++ does not permit %<%T::%D%> "
3774 "to be defined as %<%T::%D%>",
3775 DECL_CONTEXT (field
), DECL_NAME (decl
),
3776 context
, DECL_NAME (decl
));
3777 DECL_CONTEXT (decl
) = DECL_CONTEXT (field
);
3779 /* Static data member are tricky; an in-class initialization
3780 still doesn't provide a definition, so the in-class
3781 declaration will have DECL_EXTERNAL set, but will have an
3782 initialization. Thus, duplicate_decls won't warn
3783 about this situation, and so we check here. */
3784 if (DECL_INITIAL (decl
) && DECL_INITIAL (field
))
3785 error ("duplicate initialization of %qD", decl
);
3786 if (duplicate_decls (decl
, field
))
3792 tree field
= check_classfn (context
, decl
,
3793 (processing_template_decl
3794 > template_class_depth (context
))
3795 ? current_template_parms
3797 if (field
&& duplicate_decls (decl
, field
))
3801 /* cp_finish_decl sets DECL_EXTERNAL if DECL_IN_AGGR_P is set. */
3802 DECL_IN_AGGR_P (decl
) = 0;
3803 if ((DECL_LANG_SPECIFIC (decl
) && DECL_USE_TEMPLATE (decl
))
3804 || CLASSTYPE_TEMPLATE_INSTANTIATION (context
))
3806 SET_DECL_TEMPLATE_SPECIALIZATION (decl
);
3807 /* [temp.expl.spec] An explicit specialization of a static data
3808 member of a template is a definition if the declaration
3809 includes an initializer; otherwise, it is a declaration.
3811 We check for processing_specialization so this only applies
3812 to the new specialization syntax. */
3813 if (DECL_INITIAL (decl
) == NULL_TREE
&& processing_specialization
)
3814 DECL_EXTERNAL (decl
) = 1;
3817 if (DECL_EXTERNAL (decl
) && ! DECL_TEMPLATE_SPECIALIZATION (decl
))
3818 pedwarn ("declaration of %q#D outside of class is not definition",
3822 /* Enter this declaration into the symbol table. */
3823 tem
= maybe_push_decl (decl
);
3825 if (processing_template_decl
)
3826 tem
= push_template_decl (tem
);
3827 if (tem
== error_mark_node
)
3828 return error_mark_node
;
3830 #if ! defined (ASM_OUTPUT_BSS) && ! defined (ASM_OUTPUT_ALIGNED_BSS)
3831 /* Tell the back-end to use or not use .common as appropriate. If we say
3832 -fconserve-space, we want this to save .data space, at the expense of
3833 wrong semantics. If we say -fno-conserve-space, we want this to
3834 produce errors about redefs; to do this we force variables into the
3836 DECL_COMMON (tem
) = ((TREE_CODE (tem
) != VAR_DECL
3837 || !DECL_THREAD_LOCAL (tem
))
3838 && (flag_conserve_space
|| ! TREE_PUBLIC (tem
)));
3841 if (! processing_template_decl
)
3848 start_decl_1 (tree decl
)
3850 tree type
= TREE_TYPE (decl
);
3851 int initialized
= (DECL_INITIAL (decl
) != NULL_TREE
);
3853 if (type
== error_mark_node
)
3857 /* Is it valid for this decl to have an initializer at all?
3858 If not, set INITIALIZED to zero, which will indirectly
3859 tell `cp_finish_decl' to ignore the initializer once it is parsed. */
3861 /* Don't allow initializations for incomplete types except for
3862 arrays which might be completed by the initialization. */
3863 if (COMPLETE_TYPE_P (complete_type (type
)))
3864 ; /* A complete type is ok. */
3865 else if (TREE_CODE (type
) != ARRAY_TYPE
)
3867 error ("variable %q#D has initializer but incomplete type", decl
);
3869 type
= TREE_TYPE (decl
) = error_mark_node
;
3871 else if (!COMPLETE_TYPE_P (complete_type (TREE_TYPE (type
))))
3873 if (DECL_LANG_SPECIFIC (decl
) && DECL_TEMPLATE_INFO (decl
))
3874 error ("elements of array %q#D have incomplete type", decl
);
3875 /* else we already gave an error in start_decl. */
3881 && TREE_CODE (decl
) != TYPE_DECL
3882 && TREE_CODE (decl
) != TEMPLATE_DECL
3883 && type
!= error_mark_node
3884 && IS_AGGR_TYPE (type
)
3885 && ! DECL_EXTERNAL (decl
))
3887 if ((! processing_template_decl
|| ! uses_template_parms (type
))
3888 && !COMPLETE_TYPE_P (complete_type (type
)))
3890 error ("aggregate %q#D has incomplete type and cannot be defined",
3892 /* Change the type so that assemble_variable will give
3893 DECL an rtl we can live with: (mem (const_int 0)). */
3894 type
= TREE_TYPE (decl
) = error_mark_node
;
3898 /* If any base type in the hierarchy of TYPE needs a constructor,
3899 then we set initialized to 1. This way any nodes which are
3900 created for the purposes of initializing this aggregate
3901 will live as long as it does. This is necessary for global
3902 aggregates which do not have their initializers processed until
3903 the end of the file. */
3904 initialized
= TYPE_NEEDS_CONSTRUCTING (type
);
3909 DECL_INITIAL (decl
) = NULL_TREE
;
3911 /* Create a new scope to hold this declaration if necessary.
3912 Whether or not a new scope is necessary cannot be determined
3913 until after the type has been completed; if the type is a
3914 specialization of a class template it is not until after
3915 instantiation has occurred that TYPE_HAS_NONTRIVIAL_DESTRUCTOR
3916 will be set correctly. */
3917 maybe_push_cleanup_level (type
);
3920 /* Handle initialization of references. DECL, TYPE, and INIT have the
3921 same meaning as in cp_finish_decl. *CLEANUP must be NULL on entry,
3922 but will be set to a new CLEANUP_STMT if a temporary is created
3923 that must be destroyed subsequently.
3925 Returns an initializer expression to use to initialize DECL, or
3926 NULL if the initialization can be performed statically.
3928 Quotes on semantics can be found in ARM 8.4.3. */
3931 grok_reference_init (tree decl
, tree type
, tree init
, tree
*cleanup
)
3935 if (init
== NULL_TREE
)
3937 if ((DECL_LANG_SPECIFIC (decl
) == 0
3938 || DECL_IN_AGGR_P (decl
) == 0)
3939 && ! DECL_THIS_EXTERN (decl
))
3940 error ("%qD declared as reference but not initialized", decl
);
3944 if (TREE_CODE (init
) == CONSTRUCTOR
)
3946 error ("ISO C++ forbids use of initializer list to "
3947 "initialize reference %qD", decl
);
3951 if (TREE_CODE (init
) == TREE_LIST
)
3952 init
= build_x_compound_expr_from_list (init
, "initializer");
3954 if (TREE_CODE (TREE_TYPE (init
)) == REFERENCE_TYPE
)
3955 init
= convert_from_reference (init
);
3957 if (TREE_CODE (TREE_TYPE (type
)) != ARRAY_TYPE
3958 && TREE_CODE (TREE_TYPE (init
)) == ARRAY_TYPE
)
3959 /* Note: default conversion is only called in very special cases. */
3960 init
= decay_conversion (init
);
3962 /* Convert INIT to the reference type TYPE. This may involve the
3963 creation of a temporary, whose lifetime must be the same as that
3964 of the reference. If so, a DECL_EXPR for the temporary will be
3965 added just after the DECL_EXPR for DECL. That's why we don't set
3966 DECL_INITIAL for local references (instead assigning to them
3967 explicitly); we need to allow the temporary to be initialized
3969 tmp
= initialize_reference (type
, init
, decl
, cleanup
);
3971 if (tmp
== error_mark_node
)
3973 else if (tmp
== NULL_TREE
)
3975 error ("cannot initialize %qT from %qT", type
, TREE_TYPE (init
));
3979 if (TREE_STATIC (decl
) && !TREE_CONSTANT (tmp
))
3982 DECL_INITIAL (decl
) = tmp
;
3987 /* When parsing `int a[] = {1, 2};' we don't know the size of the
3988 array until we finish parsing the initializer. If that's the
3989 situation we're in, update DECL accordingly. */
3992 maybe_deduce_size_from_array_init (tree decl
, tree init
)
3994 tree type
= TREE_TYPE (decl
);
3996 if (TREE_CODE (type
) == ARRAY_TYPE
3997 && TYPE_DOMAIN (type
) == NULL_TREE
3998 && TREE_CODE (decl
) != TYPE_DECL
)
4000 /* do_default is really a C-ism to deal with tentative definitions.
4001 But let's leave it here to ease the eventual merge. */
4002 int do_default
= !DECL_EXTERNAL (decl
);
4003 tree initializer
= init
? init
: DECL_INITIAL (decl
);
4004 int failure
= complete_array_type (type
, initializer
, do_default
);
4007 error ("initializer fails to determine size of %qD", decl
);
4012 error ("array size missing in %qD", decl
);
4013 /* If a `static' var's size isn't known, make it extern as
4014 well as static, so it does not get allocated. If it's not
4015 `static', then don't mark it extern; finish_incomplete_decl
4016 will give it a default size and it will get allocated. */
4017 else if (!pedantic
&& TREE_STATIC (decl
) && !TREE_PUBLIC (decl
))
4018 DECL_EXTERNAL (decl
) = 1;
4021 if (pedantic
&& TYPE_DOMAIN (type
) != NULL_TREE
4022 && tree_int_cst_lt (TYPE_MAX_VALUE (TYPE_DOMAIN (type
)),
4024 error ("zero-size array %qD", decl
);
4026 layout_decl (decl
, 0);
4030 /* Set DECL_SIZE, DECL_ALIGN, etc. for DECL (a VAR_DECL), and issue
4031 any appropriate error messages regarding the layout. */
4034 layout_var_decl (tree decl
)
4036 tree type
= TREE_TYPE (decl
);
4038 tree ttype
= target_type (type
);
4041 /* If we haven't already layed out this declaration, do so now.
4042 Note that we must not call complete type for an external object
4043 because it's type might involve templates that we are not
4044 supposed to instantiate yet. (And it's perfectly valid to say
4045 `extern X x' for some incomplete type `X'.) */
4046 if (!DECL_EXTERNAL (decl
))
4047 complete_type (type
);
4048 if (!DECL_SIZE (decl
)
4049 && TREE_TYPE (decl
) != error_mark_node
4050 && (COMPLETE_TYPE_P (type
)
4051 || (TREE_CODE (type
) == ARRAY_TYPE
4052 && !TYPE_DOMAIN (type
)
4053 && COMPLETE_TYPE_P (TREE_TYPE (type
)))))
4054 layout_decl (decl
, 0);
4056 if (!DECL_EXTERNAL (decl
) && DECL_SIZE (decl
) == NULL_TREE
)
4058 /* An automatic variable with an incomplete type: that is an error.
4059 Don't talk about array types here, since we took care of that
4060 message in grokdeclarator. */
4061 error ("storage size of %qD isn't known", decl
);
4062 TREE_TYPE (decl
) = error_mark_node
;
4065 /* Keep this code around in case we later want to control debug info
4066 based on whether a type is "used". (jason 1999-11-11) */
4068 else if (!DECL_EXTERNAL (decl
) && IS_AGGR_TYPE (ttype
))
4069 /* Let debugger know it should output info for this type. */
4070 note_debug_info_needed (ttype
);
4072 if (TREE_STATIC (decl
) && DECL_CLASS_SCOPE_P (decl
))
4073 note_debug_info_needed (DECL_CONTEXT (decl
));
4076 if ((DECL_EXTERNAL (decl
) || TREE_STATIC (decl
))
4077 && DECL_SIZE (decl
) != NULL_TREE
4078 && ! TREE_CONSTANT (DECL_SIZE (decl
)))
4080 if (TREE_CODE (DECL_SIZE (decl
)) == INTEGER_CST
)
4081 constant_expression_warning (DECL_SIZE (decl
));
4083 error ("storage size of %qD isn't constant", decl
);
4086 if (TREE_STATIC (decl
)
4087 && !DECL_ARTIFICIAL (decl
)
4088 && current_function_decl
4089 && DECL_CONTEXT (decl
) == current_function_decl
)
4090 push_local_name (decl
);
4093 /* If a local static variable is declared in an inline function, or if
4094 we have a weak definition, we must endeavor to create only one
4095 instance of the variable at link-time. */
4098 maybe_commonize_var (tree decl
)
4100 /* Static data in a function with comdat linkage also has comdat
4102 if (TREE_STATIC (decl
)
4103 /* Don't mess with __FUNCTION__. */
4104 && ! DECL_ARTIFICIAL (decl
)
4105 && DECL_FUNCTION_SCOPE_P (decl
)
4106 /* Unfortunately, import_export_decl has not always been called
4107 before the function is processed, so we cannot simply check
4109 && (DECL_COMDAT (DECL_CONTEXT (decl
))
4110 || ((DECL_DECLARED_INLINE_P (DECL_CONTEXT (decl
))
4111 || DECL_TEMPLATE_INSTANTIATION (DECL_CONTEXT (decl
)))
4112 && TREE_PUBLIC (DECL_CONTEXT (decl
)))))
4116 /* With weak symbols, we simply make the variable COMDAT;
4117 that will cause copies in multiple translations units to
4119 comdat_linkage (decl
);
4123 if (DECL_INITIAL (decl
) == NULL_TREE
4124 || DECL_INITIAL (decl
) == error_mark_node
)
4126 /* Without weak symbols, we can use COMMON to merge
4127 uninitialized variables. */
4128 TREE_PUBLIC (decl
) = 1;
4129 DECL_COMMON (decl
) = 1;
4133 /* While for initialized variables, we must use internal
4134 linkage -- which means that multiple copies will not
4136 TREE_PUBLIC (decl
) = 0;
4137 DECL_COMMON (decl
) = 0;
4138 cp_warning_at ("sorry: semantics of inline function static "
4139 "data %q#D are wrong (you'll wind up "
4140 "with multiple copies)", decl
);
4141 warning ("%J you can work around this by removing "
4147 else if (DECL_LANG_SPECIFIC (decl
) && DECL_COMDAT (decl
))
4148 /* Set it up again; we might have set DECL_INITIAL since the last
4150 comdat_linkage (decl
);
4153 /* Issue an error message if DECL is an uninitialized const variable. */
4156 check_for_uninitialized_const_var (tree decl
)
4158 tree type
= TREE_TYPE (decl
);
4160 /* ``Unless explicitly declared extern, a const object does not have
4161 external linkage and must be initialized. ($8.4; $12.1)'' ARM
4163 if (TREE_CODE (decl
) == VAR_DECL
4164 && TREE_CODE (type
) != REFERENCE_TYPE
4165 && CP_TYPE_CONST_P (type
)
4166 && !TYPE_NEEDS_CONSTRUCTING (type
)
4167 && !DECL_INITIAL (decl
))
4168 error ("uninitialized const %qD", decl
);
4171 /* FIELD is a FIELD_DECL or NULL. In the former case, the value
4172 returned is the next FIELD_DECL (possibly FIELD itself) that can be
4173 initialized. If there are no more such fields, the return value
4177 next_initializable_field (tree field
)
4180 && (TREE_CODE (field
) != FIELD_DECL
4181 || (DECL_C_BIT_FIELD (field
) && !DECL_NAME (field
))
4182 || DECL_ARTIFICIAL (field
)))
4183 field
= TREE_CHAIN (field
);
4188 /* Subroutine of reshape_init. Reshape the constructor for an array. INITP
4189 is the pointer to the old constructor list (to the CONSTRUCTOR_ELTS of
4190 the CONSTRUCTOR we are processing), while NEW_INIT is the CONSTRUCTOR we
4192 ELT_TYPE is the element type of the array. MAX_INDEX is an INTEGER_CST
4193 representing the size of the array minus one (the maximum index), or
4194 NULL_TREE if the array was declared without specifying the size. */
4197 reshape_init_array (tree elt_type
, tree max_index
,
4198 tree
*initp
, tree new_init
)
4200 bool sized_array_p
= (max_index
!= NULL_TREE
);
4201 HOST_WIDE_INT max_index_cst
= 0;
4202 HOST_WIDE_INT index
;
4205 /* HWI is either 32bit or 64bit, so it must be enough to represent the
4207 max_index_cst
= tree_low_cst (max_index
, 1);
4209 /* Loop until there are no more initializers. */
4211 *initp
&& (!sized_array_p
|| index
<= max_index_cst
);
4215 tree designated_index
;
4217 element_init
= reshape_init (elt_type
, initp
);
4218 if (element_init
== error_mark_node
)
4220 TREE_CHAIN (element_init
) = CONSTRUCTOR_ELTS (new_init
);
4221 CONSTRUCTOR_ELTS (new_init
) = element_init
;
4222 designated_index
= TREE_PURPOSE (element_init
);
4223 if (designated_index
)
4225 /* Handle array designated initializers (GNU extension). */
4226 if (TREE_CODE (designated_index
) == IDENTIFIER_NODE
)
4228 error ("name %qD used in a GNU-style designated "
4229 "initializer for an array", designated_index
);
4230 TREE_PURPOSE (element_init
) = NULL_TREE
;
4234 gcc_assert (TREE_CODE (designated_index
) == INTEGER_CST
);
4236 && tree_int_cst_lt (max_index
, designated_index
))
4238 error ("Designated initializer %qE larger than array "
4239 "size", designated_index
);
4240 TREE_PURPOSE (element_init
) = NULL_TREE
;
4243 index
= tree_low_cst (designated_index
, 1);
4251 /* Undo the brace-elision allowed by [dcl.init.aggr] in a
4252 brace-enclosed aggregate initializer.
4254 *INITP is one of a list of initializers describing a brace-enclosed
4255 initializer for an entity of the indicated aggregate TYPE. It may
4256 not presently match the shape of the TYPE; for example:
4258 struct S { int a; int b; };
4259 struct S a[] = { 1, 2, 3, 4 };
4261 Here *INITP will point to TREE_LIST of four elements, rather than a
4262 list of two elements, each itself a list of two elements. This
4263 routine transforms INIT from the former form into the latter. The
4264 revised initializer is returned. */
4267 reshape_init (tree type
, tree
*initp
)
4271 tree old_init_value
;
4273 bool brace_enclosed_p
;
4276 old_init_value
= (TREE_CODE (*initp
) == TREE_LIST
4277 ? TREE_VALUE (*initp
) : old_init
);
4279 gcc_assert (old_init_value
);
4281 /* If the initializer is brace-enclosed, pull initializers from the
4282 enclosed elements. Advance past the brace-enclosed initializer
4284 if (TREE_CODE (old_init_value
) == CONSTRUCTOR
4285 && BRACE_ENCLOSED_INITIALIZER_P (old_init_value
))
4287 *initp
= TREE_CHAIN (old_init
);
4288 TREE_CHAIN (old_init
) = NULL_TREE
;
4289 inits
= CONSTRUCTOR_ELTS (old_init_value
);
4291 brace_enclosed_p
= true;
4296 brace_enclosed_p
= false;
4299 /* A non-aggregate type is always initialized with a single
4301 if (!CP_AGGREGATE_TYPE_P (type
))
4303 *initp
= TREE_CHAIN (old_init
);
4304 TREE_CHAIN (old_init
) = NULL_TREE
;
4305 /* It is invalid to initialize a non-aggregate type with a
4306 brace-enclosed initializer. */
4307 if (brace_enclosed_p
)
4309 error ("brace-enclosed initializer used to initialize %qT",
4311 if (TREE_CODE (old_init
) == TREE_LIST
)
4312 TREE_VALUE (old_init
) = error_mark_node
;
4314 old_init
= error_mark_node
;
4322 All implicit type conversions (clause _conv_) are considered when
4323 initializing the aggregate member with an initializer from an
4324 initializer-list. If the initializer can initialize a member,
4325 the member is initialized. Otherwise, if the member is itself a
4326 non-empty subaggregate, brace elision is assumed and the
4327 initializer is considered for the initialization of the first
4328 member of the subaggregate. */
4329 if (!brace_enclosed_p
4330 && can_convert_arg (type
, TREE_TYPE (old_init_value
), old_init_value
))
4332 *initp
= TREE_CHAIN (old_init
);
4333 TREE_CHAIN (old_init
) = NULL_TREE
;
4337 if (TREE_CODE (old_init_value
) == STRING_CST
4338 && TREE_CODE (type
) == ARRAY_TYPE
4339 && char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (type
))))
4341 /* [dcl.init.string]
4343 A char array (whether plain char, signed char, or unsigned char)
4344 can be initialized by a string-literal (optionally enclosed in
4345 braces); a wchar_t array can be initialized by a wide
4346 string-literal (optionally enclosed in braces). */
4347 new_init
= old_init
;
4348 /* Move past the initializer. */
4349 *initp
= TREE_CHAIN (old_init
);
4350 TREE_CHAIN (old_init
) = NULL_TREE
;
4354 /* Build a CONSTRUCTOR to hold the contents of the aggregate. */
4355 new_init
= build_constructor (NULL_TREE
, NULL_TREE
);
4357 if (CLASS_TYPE_P (type
))
4361 field
= next_initializable_field (TYPE_FIELDS (type
));
4367 An initializer for an aggregate member that is an
4368 empty class shall have the form of an empty
4369 initializer-list {}. */
4370 if (!brace_enclosed_p
)
4372 error ("initializer for %qT must be brace-enclosed", type
);
4373 return error_mark_node
;
4378 /* Loop through the initializable fields, gathering
4384 /* Handle designated initializers, as an extension. */
4385 if (TREE_PURPOSE (*initp
))
4388 pedwarn ("ISO C++ does not allow designated initializers");
4389 field
= lookup_field_1 (type
, TREE_PURPOSE (*initp
),
4390 /*want_type=*/false);
4391 if (!field
|| TREE_CODE (field
) != FIELD_DECL
)
4392 error ("%qT has no non-static data member named %qD",
4393 type
, TREE_PURPOSE (*initp
));
4398 field_init
= reshape_init (TREE_TYPE (field
), initp
);
4399 if (field_init
== error_mark_node
)
4400 return error_mark_node
;
4401 TREE_CHAIN (field_init
) = CONSTRUCTOR_ELTS (new_init
);
4402 CONSTRUCTOR_ELTS (new_init
) = field_init
;
4405 When a union is initialized with a brace-enclosed
4406 initializer, the braces shall only contain an
4407 initializer for the first member of the union. */
4408 if (TREE_CODE (type
) == UNION_TYPE
)
4410 field
= next_initializable_field (TREE_CHAIN (field
));
4414 else if (TREE_CODE (type
) == ARRAY_TYPE
4415 || TREE_CODE (type
) == VECTOR_TYPE
)
4417 /* If the bound of the array is known, take no more initializers
4418 than are allowed. */
4419 tree max_index
= NULL_TREE
;
4420 if (TREE_CODE (type
) == ARRAY_TYPE
)
4422 if (TYPE_DOMAIN (type
))
4423 max_index
= array_type_nelts (type
);
4427 /* For a vector, the representation type is a struct
4428 containing a single member which is an array of the
4429 appropriate size. */
4430 tree rtype
= TYPE_DEBUG_REPRESENTATION_TYPE (type
);
4431 if (rtype
&& TYPE_DOMAIN (TREE_TYPE (TYPE_FIELDS (rtype
))))
4432 max_index
= array_type_nelts (TREE_TYPE (TYPE_FIELDS
4436 if (!reshape_init_array (TREE_TYPE (type
), max_index
,
4438 return error_mark_node
;
4443 /* The initializers were placed in reverse order in the
4445 CONSTRUCTOR_ELTS (new_init
) = nreverse (CONSTRUCTOR_ELTS (new_init
));
4447 if (TREE_CODE (old_init
) == TREE_LIST
)
4448 new_init
= build_tree_list (TREE_PURPOSE (old_init
), new_init
);
4451 /* If this was a brace-enclosed initializer and all of the
4452 initializers were not used up, there is a problem. */
4453 if (brace_enclosed_p
&& *initp
)
4454 error ("too many initializers for %qT", type
);
4459 /* Verify INIT (the initializer for DECL), and record the
4460 initialization in DECL_INITIAL, if appropriate. CLEANUP is as for
4461 grok_reference_init.
4463 If the return value is non-NULL, it is an expression that must be
4464 evaluated dynamically to initialize DECL. */
4467 check_initializer (tree decl
, tree init
, int flags
, tree
*cleanup
)
4469 tree type
= TREE_TYPE (decl
);
4470 tree init_code
= NULL
;
4472 /* If `start_decl' didn't like having an initialization, ignore it now. */
4473 if (init
!= NULL_TREE
&& DECL_INITIAL (decl
) == NULL_TREE
)
4476 /* If an initializer is present, DECL_INITIAL has been
4477 error_mark_node, to indicate that an as-of-yet unevaluated
4478 initialization will occur. From now on, DECL_INITIAL reflects
4479 the static initialization -- if any -- of DECL. */
4480 DECL_INITIAL (decl
) = NULL_TREE
;
4482 /* Things that are going to be initialized need to have complete
4484 TREE_TYPE (decl
) = type
= complete_type (TREE_TYPE (decl
));
4486 if (type
== error_mark_node
)
4487 /* We will have already complained. */
4489 else if (init
&& COMPLETE_TYPE_P (type
)
4490 && !TREE_CONSTANT (TYPE_SIZE (type
)))
4492 error ("variable-sized object %qD may not be initialized", decl
);
4495 else if (TREE_CODE (type
) == ARRAY_TYPE
4496 && !COMPLETE_TYPE_P (complete_type (TREE_TYPE (type
))))
4498 error ("elements of array %q#D have incomplete type", decl
);
4501 else if (TREE_CODE (type
) != ARRAY_TYPE
&& !COMPLETE_TYPE_P (type
))
4503 error ("%qD has incomplete type", decl
);
4504 TREE_TYPE (decl
) = error_mark_node
;
4508 if (TREE_CODE (decl
) == CONST_DECL
)
4510 gcc_assert (TREE_CODE (decl
) != REFERENCE_TYPE
);
4512 DECL_INITIAL (decl
) = init
;
4514 gcc_assert (init
!= NULL_TREE
);
4517 else if (!DECL_EXTERNAL (decl
) && TREE_CODE (type
) == REFERENCE_TYPE
)
4518 init
= grok_reference_init (decl
, type
, init
, cleanup
);
4521 if (TREE_CODE (init
) == CONSTRUCTOR
4522 && BRACE_ENCLOSED_INITIALIZER_P (init
))
4524 /* [dcl.init] paragraph 13,
4525 If T is a scalar type, then a declaration of the form
4530 reshape_init will complain about the extra braces,
4531 and doesn't do anything useful in the case where TYPE is
4532 scalar, so just don't call it. */
4533 if (CP_AGGREGATE_TYPE_P (type
))
4534 init
= reshape_init (type
, &init
);
4536 if ((*targetm
.vector_opaque_p
) (type
))
4538 error ("opaque vector types cannot be initialized");
4539 init
= error_mark_node
;
4543 /* If DECL has an array type without a specific bound, deduce the
4544 array size from the initializer. */
4545 maybe_deduce_size_from_array_init (decl
, init
);
4546 type
= TREE_TYPE (decl
);
4548 if (TYPE_HAS_CONSTRUCTOR (type
) || TYPE_NEEDS_CONSTRUCTING (type
))
4550 if (TREE_CODE (type
) == ARRAY_TYPE
)
4551 goto initialize_aggr
;
4552 else if (TREE_CODE (init
) == CONSTRUCTOR
4553 && BRACE_ENCLOSED_INITIALIZER_P (init
))
4555 if (TYPE_NON_AGGREGATE_CLASS (type
))
4557 error ("%qD must be initialized by constructor, "
4560 init
= error_mark_node
;
4563 goto dont_use_constructor
;
4567 int saved_stmts_are_full_exprs_p
;
4570 saved_stmts_are_full_exprs_p
= 0;
4571 if (building_stmt_tree ())
4573 saved_stmts_are_full_exprs_p
= stmts_are_full_exprs_p ();
4574 current_stmt_tree ()->stmts_are_full_exprs_p
= 1;
4576 init
= build_aggr_init (decl
, init
, flags
);
4577 if (building_stmt_tree ())
4578 current_stmt_tree ()->stmts_are_full_exprs_p
=
4579 saved_stmts_are_full_exprs_p
;
4585 dont_use_constructor
:
4586 if (TREE_CODE (init
) != TREE_VEC
)
4588 init_code
= store_init_value (decl
, init
);
4593 else if (DECL_EXTERNAL (decl
))
4595 else if (TYPE_P (type
) && TYPE_NEEDS_CONSTRUCTING (type
))
4596 goto initialize_aggr
;
4597 else if (IS_AGGR_TYPE (type
))
4599 tree core_type
= strip_array_types (type
);
4601 if (CLASSTYPE_READONLY_FIELDS_NEED_INIT (core_type
))
4602 error ("structure %qD with uninitialized const members", decl
);
4603 if (CLASSTYPE_REF_FIELDS_NEED_INIT (core_type
))
4604 error ("structure %qD with uninitialized reference members", decl
);
4606 check_for_uninitialized_const_var (decl
);
4609 check_for_uninitialized_const_var (decl
);
4611 if (init
&& init
!= error_mark_node
)
4612 init_code
= build2 (INIT_EXPR
, type
, decl
, init
);
4617 /* If DECL is not a local variable, give it RTL. */
4620 make_rtl_for_nonlocal_decl (tree decl
, tree init
, const char* asmspec
)
4622 int toplev
= toplevel_bindings_p ();
4625 /* Set the DECL_ASSEMBLER_NAME for the object. */
4628 /* The `register' keyword, when used together with an
4629 asm-specification, indicates that the variable should be
4630 placed in a particular register. */
4631 if (TREE_CODE (decl
) == VAR_DECL
&& DECL_REGISTER (decl
))
4633 change_decl_assembler_name (decl
, get_identifier (asmspec
));
4634 DECL_HARD_REGISTER (decl
) = 1;
4637 set_user_assembler_name (decl
, asmspec
);
4640 /* Handle non-variables up front. */
4641 if (TREE_CODE (decl
) != VAR_DECL
)
4643 rest_of_decl_compilation (decl
, toplev
, at_eof
);
4647 /* If we see a class member here, it should be a static data
4649 if (DECL_LANG_SPECIFIC (decl
) && DECL_IN_AGGR_P (decl
))
4651 gcc_assert (TREE_STATIC (decl
));
4652 /* An in-class declaration of a static data member should be
4653 external; it is only a declaration, and not a definition. */
4654 if (init
== NULL_TREE
)
4655 gcc_assert (DECL_EXTERNAL (decl
));
4658 /* We don't create any RTL for local variables. */
4659 if (DECL_FUNCTION_SCOPE_P (decl
) && !TREE_STATIC (decl
))
4662 /* We defer emission of local statics until the corresponding
4663 DECL_EXPR is expanded. */
4664 defer_p
= DECL_FUNCTION_SCOPE_P (decl
) || DECL_VIRTUAL_P (decl
);
4666 /* We try to defer namespace-scope static constants so that they are
4667 not emitted into the object file unnecessarily. */
4668 if (!DECL_VIRTUAL_P (decl
)
4669 && TREE_READONLY (decl
)
4670 && DECL_INITIAL (decl
) != NULL_TREE
4671 && DECL_INITIAL (decl
) != error_mark_node
4672 && ! EMPTY_CONSTRUCTOR_P (DECL_INITIAL (decl
))
4674 && !TREE_PUBLIC (decl
))
4676 /* Fool with the linkage of static consts according to #pragma
4678 struct c_fileinfo
*finfo
= get_fileinfo (lbasename (input_filename
));
4679 if (!finfo
->interface_unknown
&& !TREE_PUBLIC (decl
))
4681 TREE_PUBLIC (decl
) = 1;
4682 DECL_EXTERNAL (decl
) = finfo
->interface_only
;
4687 /* Likewise for template instantiations. */
4688 else if (DECL_LANG_SPECIFIC (decl
)
4689 && DECL_IMPLICIT_INSTANTIATION (decl
))
4692 /* If we're not deferring, go ahead and assemble the variable. */
4694 rest_of_decl_compilation (decl
, toplev
, at_eof
);
4697 /* Generate code to initialize DECL (a local variable). */
4700 initialize_local_var (tree decl
, tree init
)
4702 tree type
= TREE_TYPE (decl
);
4705 gcc_assert (TREE_CODE (decl
) == VAR_DECL
4706 || TREE_CODE (decl
) == RESULT_DECL
);
4707 gcc_assert (!TREE_STATIC (decl
));
4709 if (DECL_SIZE (decl
) == NULL_TREE
)
4711 /* If we used it already as memory, it must stay in memory. */
4712 DECL_INITIAL (decl
) = NULL_TREE
;
4713 TREE_ADDRESSABLE (decl
) = TREE_USED (decl
);
4716 if (DECL_SIZE (decl
) && type
!= error_mark_node
)
4720 /* Compute and store the initial value. */
4721 already_used
= TREE_USED (decl
) || TREE_USED (type
);
4723 /* Perform the initialization. */
4726 int saved_stmts_are_full_exprs_p
;
4728 gcc_assert (building_stmt_tree ());
4729 saved_stmts_are_full_exprs_p
= stmts_are_full_exprs_p ();
4730 current_stmt_tree ()->stmts_are_full_exprs_p
= 1;
4731 finish_expr_stmt (init
);
4732 current_stmt_tree ()->stmts_are_full_exprs_p
=
4733 saved_stmts_are_full_exprs_p
;
4736 /* Set this to 0 so we can tell whether an aggregate which was
4737 initialized was ever used. Don't do this if it has a
4738 destructor, so we don't complain about the 'resource
4739 allocation is initialization' idiom. Now set
4740 attribute((unused)) on types so decls of that type will be
4741 marked used. (see TREE_USED, above.) */
4742 if (TYPE_NEEDS_CONSTRUCTING (type
)
4744 && TYPE_HAS_TRIVIAL_DESTRUCTOR (type
)
4745 && DECL_NAME (decl
))
4746 TREE_USED (decl
) = 0;
4747 else if (already_used
)
4748 TREE_USED (decl
) = 1;
4751 /* Generate a cleanup, if necessary. */
4752 cleanup
= cxx_maybe_build_cleanup (decl
);
4753 if (DECL_SIZE (decl
) && cleanup
)
4754 finish_decl_cleanup (decl
, cleanup
);
4757 /* DECL is a VAR_DECL for a compiler-generated variable with static
4758 storage duration (like a virtual table) whose initializer is a
4759 compile-time constant. Initialize the variable and provide it to
4763 initialize_artificial_var (tree decl
, tree init
)
4765 DECL_INITIAL (decl
) = build_constructor (NULL_TREE
, init
);
4766 DECL_INITIALIZED_P (decl
) = 1;
4767 determine_visibility (decl
);
4768 layout_var_decl (decl
);
4769 maybe_commonize_var (decl
);
4770 make_rtl_for_nonlocal_decl (decl
, init
, /*asmspec=*/NULL
);
4773 /* Finish processing of a declaration;
4774 install its line number and initial value.
4775 If the length of an array type is not known before,
4776 it must be determined now, from the initial value, or it is an error.
4778 INIT holds the value of an initializer that should be allowed to escape
4781 FLAGS is LOOKUP_ONLYCONVERTING if the = init syntax was used, else 0
4782 if the (init) syntax was used. */
4785 cp_finish_decl (tree decl
, tree init
, tree asmspec_tree
, int flags
)
4788 tree ttype
= NULL_TREE
;
4790 const char *asmspec
= NULL
;
4791 int was_readonly
= 0;
4792 bool var_definition_p
= false;
4794 if (decl
== error_mark_node
)
4799 error ("assignment (not initialization) in declaration");
4803 gcc_assert (TREE_CODE (decl
) != RESULT_DECL
);
4805 /* Assume no cleanup is required. */
4806 cleanup
= NULL_TREE
;
4808 /* If a name was specified, get the string. */
4809 if (global_scope_p (current_binding_level
))
4810 asmspec_tree
= maybe_apply_renaming_pragma (decl
, asmspec_tree
);
4812 asmspec
= TREE_STRING_POINTER (asmspec_tree
);
4814 if (init
&& TREE_CODE (init
) == NAMESPACE_DECL
)
4816 error ("cannot initialize %qD to namespace %qD", decl
, init
);
4820 if (current_class_type
4821 && CP_DECL_CONTEXT (decl
) == current_class_type
4822 && TYPE_BEING_DEFINED (current_class_type
)
4823 && (DECL_INITIAL (decl
) || init
))
4824 DECL_INITIALIZED_IN_CLASS_P (decl
) = 1;
4826 type
= TREE_TYPE (decl
);
4828 if (type
== error_mark_node
)
4831 if (TYPE_HAS_MUTABLE_P (type
))
4832 TREE_READONLY (decl
) = 0;
4834 if (processing_template_decl
)
4836 /* Add this declaration to the statement-tree. */
4837 if (at_function_scope_p ())
4838 add_decl_expr (decl
);
4840 if (init
&& DECL_INITIAL (decl
))
4841 DECL_INITIAL (decl
) = init
;
4842 if (TREE_CODE (decl
) == VAR_DECL
4843 && !DECL_PRETTY_FUNCTION_P (decl
)
4844 && !dependent_type_p (TREE_TYPE (decl
)))
4845 maybe_deduce_size_from_array_init (decl
, init
);
4849 /* Parameters are handled by store_parm_decls, not cp_finish_decl. */
4850 gcc_assert (TREE_CODE (decl
) != PARM_DECL
);
4852 /* Take care of TYPE_DECLs up front. */
4853 if (TREE_CODE (decl
) == TYPE_DECL
)
4855 if (type
!= error_mark_node
4856 && IS_AGGR_TYPE (type
) && DECL_NAME (decl
))
4858 if (TREE_TYPE (DECL_NAME (decl
)) && TREE_TYPE (decl
) != type
)
4859 warning ("shadowing previous type declaration of %q#D", decl
);
4860 set_identifier_type_value (DECL_NAME (decl
), decl
);
4863 /* If we have installed this as the canonical typedef for this
4864 type, and that type has not been defined yet, delay emitting
4865 the debug information for it, as we will emit it later. */
4866 if (TYPE_MAIN_DECL (TREE_TYPE (decl
)) == decl
4867 && !COMPLETE_TYPE_P (TREE_TYPE (decl
)))
4868 TYPE_DECL_SUPPRESS_DEBUG (decl
) = 1;
4870 rest_of_decl_compilation (decl
, DECL_CONTEXT (decl
) == NULL_TREE
,
4875 if (TREE_CODE (decl
) != FUNCTION_DECL
)
4876 ttype
= target_type (type
);
4879 /* Currently, GNU C++ puts constants in text space, making them
4880 impossible to initialize. In the future, one would hope for
4881 an operating system which understood the difference between
4882 initialization and the running of a program. */
4883 if (! DECL_EXTERNAL (decl
) && TREE_READONLY (decl
))
4886 if (TYPE_NEEDS_CONSTRUCTING (type
)
4887 || TREE_CODE (type
) == REFERENCE_TYPE
)
4888 TREE_READONLY (decl
) = 0;
4891 if (TREE_CODE (decl
) == VAR_DECL
)
4893 /* Only PODs can have thread-local storage. Other types may require
4894 various kinds of non-trivial initialization. */
4895 if (DECL_THREAD_LOCAL (decl
) && !pod_type_p (TREE_TYPE (decl
)))
4896 error ("%qD cannot be thread-local because it has non-POD type %qT",
4897 decl
, TREE_TYPE (decl
));
4898 /* Convert the initializer to the type of DECL, if we have not
4899 already initialized DECL. */
4900 if (!DECL_INITIALIZED_P (decl
)
4901 /* If !DECL_EXTERNAL then DECL is being defined. In the
4902 case of a static data member initialized inside the
4903 class-specifier, there can be an initializer even if DECL
4904 is *not* defined. */
4905 && (!DECL_EXTERNAL (decl
) || init
))
4907 init
= check_initializer (decl
, init
, flags
, &cleanup
);
4908 /* Thread-local storage cannot be dynamically initialized. */
4909 if (DECL_THREAD_LOCAL (decl
) && init
)
4911 error ("%qD is thread-local and so cannot be dynamically "
4912 "initialized", decl
);
4919 The memory occupied by any object of static storage
4920 duration is zero-initialized at program startup before
4921 any other initialization takes place.
4923 We cannot create an appropriate initializer until after
4924 the type of DECL is finalized. If DECL_INITIAL is set,
4925 then the DECL is statically initialized, and any
4926 necessary zero-initialization has already been performed. */
4927 if (TREE_STATIC (decl
) && !DECL_INITIAL (decl
))
4928 DECL_INITIAL (decl
) = build_zero_init (TREE_TYPE (decl
),
4929 /*nelts=*/NULL_TREE
,
4930 /*static_storage_p=*/true);
4931 /* Remember that the initialization for this variable has
4933 DECL_INITIALIZED_P (decl
) = 1;
4934 /* This declaration is the definition of this variable,
4935 unless we are initializing a static data member within
4936 the class specifier. */
4937 if (!DECL_EXTERNAL (decl
))
4938 var_definition_p
= true;
4939 /* The variable is being defined, so determine its
4941 determine_visibility (decl
);
4943 /* If the variable has an array type, lay out the type, even if
4944 there is no initializer. It is valid to index through the
4945 array, and we must get TYPE_ALIGN set correctly on the array
4947 else if (TREE_CODE (type
) == ARRAY_TYPE
)
4951 /* Add this declaration to the statement-tree. This needs to happen
4952 after the call to check_initializer so that the DECL_EXPR for a
4953 reference temp is added before the DECL_EXPR for the reference itself. */
4954 if (at_function_scope_p ())
4955 add_decl_expr (decl
);
4957 if (TREE_CODE (decl
) == VAR_DECL
)
4958 layout_var_decl (decl
);
4960 /* Output the assembler code and/or RTL code for variables and functions,
4961 unless the type is an undefined structure or union.
4962 If not, it will get done when the type is completed. */
4963 if (TREE_CODE (decl
) == VAR_DECL
|| TREE_CODE (decl
) == FUNCTION_DECL
)
4965 if (TREE_CODE (decl
) == VAR_DECL
)
4966 maybe_commonize_var (decl
);
4968 make_rtl_for_nonlocal_decl (decl
, init
, asmspec
);
4970 /* Check for abstractness of the type. Notice that there is no
4971 need to strip array types here since the check for those types
4972 is already done within create_array_type_for_decl. */
4973 if (TREE_CODE (type
) == FUNCTION_TYPE
4974 || TREE_CODE (type
) == METHOD_TYPE
)
4975 abstract_virtuals_error (decl
, TREE_TYPE (type
));
4977 abstract_virtuals_error (decl
, type
);
4979 if (TREE_CODE (decl
) == FUNCTION_DECL
4980 || TREE_TYPE (decl
) == error_mark_node
)
4981 /* No initialization required. */
4983 else if (DECL_EXTERNAL (decl
)
4984 && ! (DECL_LANG_SPECIFIC (decl
)
4985 && DECL_NOT_REALLY_EXTERN (decl
)))
4988 DECL_INITIAL (decl
) = init
;
4992 /* A variable definition. */
4993 if (DECL_FUNCTION_SCOPE_P (decl
))
4995 /* Initialize the local variable. */
4996 if (processing_template_decl
)
4998 if (init
|| DECL_INITIAL (decl
) == error_mark_node
)
4999 DECL_INITIAL (decl
) = init
;
5001 else if (!TREE_STATIC (decl
))
5002 initialize_local_var (decl
, init
);
5005 /* If a variable is defined, and then a subsequent
5006 definition with external linkage is encountered, we will
5007 get here twice for the same variable. We want to avoid
5008 calling expand_static_init more than once. For variables
5009 that are not static data members, we can call
5010 expand_static_init only when we actually process the
5011 initializer. It is not legal to redeclare a static data
5012 member, so this issue does not arise in that case. */
5013 if (var_definition_p
&& TREE_STATIC (decl
))
5014 expand_static_init (decl
, init
);
5018 /* If a CLEANUP_STMT was created to destroy a temporary bound to a
5019 reference, insert it in the statement-tree now. */
5021 push_cleanup (decl
, cleanup
, false);
5026 TREE_READONLY (decl
) = 1;
5028 /* If this was marked 'used', be sure it will be output. */
5029 if (lookup_attribute ("used", DECL_ATTRIBUTES (decl
)))
5030 mark_decl_referenced (decl
);
5033 /* This is here for a midend callback from c-common.c. */
5036 finish_decl (tree decl
, tree init
, tree asmspec_tree
)
5038 cp_finish_decl (decl
, init
, asmspec_tree
, 0);
5041 /* Returns a declaration for a VAR_DECL as if:
5043 extern "C" TYPE NAME;
5045 had been seen. Used to create compiler-generated global
5049 declare_global_var (tree name
, tree type
)
5053 push_to_top_level ();
5054 decl
= build_decl (VAR_DECL
, name
, type
);
5055 TREE_PUBLIC (decl
) = 1;
5056 DECL_EXTERNAL (decl
) = 1;
5057 DECL_ARTIFICIAL (decl
) = 1;
5058 /* If the user has explicitly declared this variable (perhaps
5059 because the code we are compiling is part of a low-level runtime
5060 library), then it is possible that our declaration will be merged
5061 with theirs by pushdecl. */
5062 decl
= pushdecl (decl
);
5063 cp_finish_decl (decl
, NULL_TREE
, NULL_TREE
, 0);
5064 pop_from_top_level ();
5069 /* Returns a pointer to the `atexit' function. Note that if
5070 FLAG_USE_CXA_ATEXIT is nonzero, then this will actually be the new
5071 `__cxa_atexit' function specified in the IA64 C++ ABI. */
5074 get_atexit_node (void)
5085 if (flag_use_cxa_atexit
)
5087 /* The declaration for `__cxa_atexit' is:
5089 int __cxa_atexit (void (*)(void *), void *, void *)
5091 We build up the argument types and then then function type
5094 /* First, build the pointer-to-function type for the first
5096 arg_types
= tree_cons (NULL_TREE
, ptr_type_node
, void_list_node
);
5097 fn_type
= build_function_type (void_type_node
, arg_types
);
5098 fn_ptr_type
= build_pointer_type (fn_type
);
5099 /* Then, build the rest of the argument types. */
5100 arg_types
= tree_cons (NULL_TREE
, ptr_type_node
, void_list_node
);
5101 arg_types
= tree_cons (NULL_TREE
, ptr_type_node
, arg_types
);
5102 arg_types
= tree_cons (NULL_TREE
, fn_ptr_type
, arg_types
);
5103 /* And the final __cxa_atexit type. */
5104 fn_type
= build_function_type (integer_type_node
, arg_types
);
5105 fn_ptr_type
= build_pointer_type (fn_type
);
5106 name
= "__cxa_atexit";
5110 /* The declaration for `atexit' is:
5112 int atexit (void (*)());
5114 We build up the argument types and then then function type
5116 fn_type
= build_function_type (void_type_node
, void_list_node
);
5117 fn_ptr_type
= build_pointer_type (fn_type
);
5118 arg_types
= tree_cons (NULL_TREE
, fn_ptr_type
, void_list_node
);
5119 /* Build the final atexit type. */
5120 fn_type
= build_function_type (integer_type_node
, arg_types
);
5124 /* Now, build the function declaration. */
5125 push_lang_context (lang_name_c
);
5126 atexit_fndecl
= build_library_fn_ptr (name
, fn_type
);
5127 mark_used (atexit_fndecl
);
5128 pop_lang_context ();
5129 atexit_node
= decay_conversion (atexit_fndecl
);
5134 /* Returns the __dso_handle VAR_DECL. */
5137 get_dso_handle_node (void)
5139 if (dso_handle_node
)
5140 return dso_handle_node
;
5142 /* Declare the variable. */
5143 dso_handle_node
= declare_global_var (get_identifier ("__dso_handle"),
5146 return dso_handle_node
;
5149 /* Begin a new function with internal linkage whose job will be simply
5150 to destroy some particular variable. */
5152 static GTY(()) int start_cleanup_cnt
;
5155 start_cleanup_fn (void)
5162 push_to_top_level ();
5164 /* No need to mangle this. */
5165 push_lang_context (lang_name_c
);
5167 /* Build the parameter-types. */
5168 parmtypes
= void_list_node
;
5169 /* Functions passed to __cxa_atexit take an additional parameter.
5170 We'll just ignore it. After we implement the new calling
5171 convention for destructors, we can eliminate the use of
5172 additional cleanup functions entirely in the -fnew-abi case. */
5173 if (flag_use_cxa_atexit
)
5174 parmtypes
= tree_cons (NULL_TREE
, ptr_type_node
, parmtypes
);
5175 /* Build the function type itself. */
5176 fntype
= build_function_type (void_type_node
, parmtypes
);
5177 /* Build the name of the function. */
5178 sprintf (name
, "__tcf_%d", start_cleanup_cnt
++);
5179 /* Build the function declaration. */
5180 fndecl
= build_lang_decl (FUNCTION_DECL
, get_identifier (name
), fntype
);
5181 /* It's a function with internal linkage, generated by the
5183 TREE_PUBLIC (fndecl
) = 0;
5184 DECL_ARTIFICIAL (fndecl
) = 1;
5185 /* Make the function `inline' so that it is only emitted if it is
5186 actually needed. It is unlikely that it will be inlined, since
5187 it is only called via a function pointer, but we avoid unnecessary
5188 emissions this way. */
5189 DECL_INLINE (fndecl
) = 1;
5190 DECL_DECLARED_INLINE_P (fndecl
) = 1;
5191 DECL_INTERFACE_KNOWN (fndecl
) = 1;
5192 /* Build the parameter. */
5193 if (flag_use_cxa_atexit
)
5197 parmdecl
= cp_build_parm_decl (NULL_TREE
, ptr_type_node
);
5198 DECL_CONTEXT (parmdecl
) = fndecl
;
5199 TREE_USED (parmdecl
) = 1;
5200 DECL_ARGUMENTS (fndecl
) = parmdecl
;
5204 start_preparsed_function (fndecl
, NULL_TREE
, SF_PRE_PARSED
);
5206 pop_lang_context ();
5208 return current_function_decl
;
5211 /* Finish the cleanup function begun by start_cleanup_fn. */
5214 end_cleanup_fn (void)
5216 expand_or_defer_fn (finish_function (0));
5218 pop_from_top_level ();
5221 /* Generate code to handle the destruction of DECL, an object with
5222 static storage duration. */
5225 register_dtor_fn (tree decl
)
5232 if (TYPE_HAS_TRIVIAL_DESTRUCTOR (TREE_TYPE (decl
)))
5233 return void_zero_node
;
5235 /* Call build_cleanup before we enter the anonymous function so that
5236 any access checks will be done relative to the current scope,
5237 rather than the scope of the anonymous function. */
5238 build_cleanup (decl
);
5240 /* Now start the function. */
5241 cleanup
= start_cleanup_fn ();
5243 /* Now, recompute the cleanup. It may contain SAVE_EXPRs that refer
5244 to the original function, rather than the anonymous one. That
5245 will make the back-end think that nested functions are in use,
5246 which causes confusion. */
5248 push_deferring_access_checks (dk_no_check
);
5249 fcall
= build_cleanup (decl
);
5250 pop_deferring_access_checks ();
5252 /* Create the body of the anonymous function. */
5253 compound_stmt
= begin_compound_stmt (BCS_FN_BODY
);
5254 finish_expr_stmt (fcall
);
5255 finish_compound_stmt (compound_stmt
);
5258 /* Call atexit with the cleanup function. */
5259 cxx_mark_addressable (cleanup
);
5260 mark_used (cleanup
);
5261 cleanup
= build_unary_op (ADDR_EXPR
, cleanup
, 0);
5262 if (flag_use_cxa_atexit
)
5264 args
= tree_cons (NULL_TREE
,
5265 build_unary_op (ADDR_EXPR
, get_dso_handle_node (), 0),
5267 args
= tree_cons (NULL_TREE
, null_pointer_node
, args
);
5268 args
= tree_cons (NULL_TREE
, cleanup
, args
);
5271 args
= tree_cons (NULL_TREE
, cleanup
, NULL_TREE
);
5272 return build_function_call (get_atexit_node (), args
);
5275 /* DECL is a VAR_DECL with static storage duration. INIT, if present,
5276 is its initializer. Generate code to handle the construction
5277 and destruction of DECL. */
5280 expand_static_init (tree decl
, tree init
)
5282 gcc_assert (TREE_CODE (decl
) == VAR_DECL
);
5283 gcc_assert (TREE_STATIC (decl
));
5285 /* Some variables require no initialization. */
5287 && !TYPE_NEEDS_CONSTRUCTING (TREE_TYPE (decl
))
5288 && TYPE_HAS_TRIVIAL_DESTRUCTOR (TREE_TYPE (decl
)))
5291 if (DECL_FUNCTION_SCOPE_P (decl
))
5293 /* Emit code to perform this initialization but once. */
5294 tree if_stmt
, inner_if_stmt
= NULL_TREE
;
5295 tree then_clause
, inner_then_clause
= NULL_TREE
;
5296 tree guard
, guard_addr
, guard_addr_list
;
5297 tree acquire_fn
, release_fn
, abort_fn
;
5300 /* Emit code to perform this initialization but once. This code
5303 static <type> guard;
5304 if (!guard.first_byte) {
5305 if (__cxa_guard_acquire (&guard)) {
5308 // Do initialization.
5309 flag = true; __cxa_guard_release (&guard);
5310 // Register variable for destruction at end of program.
5312 if (!flag) __cxa_guard_abort (&guard);
5316 Note that the `flag' variable is only set to 1 *after* the
5317 initialization is complete. This ensures that an exception,
5318 thrown during the construction, will cause the variable to
5319 reinitialized when we pass through this code again, as per:
5323 If the initialization exits by throwing an exception, the
5324 initialization is not complete, so it will be tried again
5325 the next time control enters the declaration.
5327 This process should be thread-safe, too; multiple threads
5328 should not be able to initialize the variable more than
5331 /* Create the guard variable. */
5332 guard
= get_guard (decl
);
5334 /* Begin the conditional initialization. */
5335 if_stmt
= begin_if_stmt ();
5336 finish_if_stmt_cond (get_guard_cond (guard
), if_stmt
);
5337 then_clause
= begin_compound_stmt (BCS_NO_SCOPE
);
5339 if (flag_threadsafe_statics
)
5341 guard_addr
= build_address (guard
);
5342 guard_addr_list
= build_tree_list (NULL_TREE
, guard_addr
);
5344 acquire_fn
= get_identifier ("__cxa_guard_acquire");
5345 release_fn
= get_identifier ("__cxa_guard_release");
5346 abort_fn
= get_identifier ("__cxa_guard_abort");
5347 if (!get_global_value_if_present (acquire_fn
, &acquire_fn
))
5349 tree argtypes
= tree_cons (NULL_TREE
, TREE_TYPE (guard_addr
),
5351 tree vfntype
= build_function_type (void_type_node
, argtypes
);
5352 acquire_fn
= push_library_fn
5353 (acquire_fn
, build_function_type (integer_type_node
, argtypes
));
5354 release_fn
= push_library_fn (release_fn
, vfntype
);
5355 abort_fn
= push_library_fn (abort_fn
, vfntype
);
5359 release_fn
= identifier_global_value (release_fn
);
5360 abort_fn
= identifier_global_value (abort_fn
);
5363 inner_if_stmt
= begin_if_stmt ();
5364 finish_if_stmt_cond (build_call (acquire_fn
, guard_addr_list
),
5367 inner_then_clause
= begin_compound_stmt (BCS_NO_SCOPE
);
5368 begin
= get_target_expr (boolean_false_node
);
5369 flag
= TARGET_EXPR_SLOT (begin
);
5371 TARGET_EXPR_CLEANUP (begin
)
5372 = build (COND_EXPR
, void_type_node
, flag
,
5374 build_call (abort_fn
, guard_addr_list
));
5375 CLEANUP_EH_ONLY (begin
) = 1;
5377 /* Do the initialization itself. */
5378 init
= add_stmt_to_compound (begin
, init
);
5379 init
= add_stmt_to_compound
5380 (init
, build (MODIFY_EXPR
, void_type_node
, flag
, boolean_true_node
));
5381 init
= add_stmt_to_compound
5382 (init
, build_call (release_fn
, guard_addr_list
));
5385 init
= add_stmt_to_compound (init
, set_guard (guard
));
5387 /* Use atexit to register a function for destroying this static
5389 init
= add_stmt_to_compound (init
, register_dtor_fn (decl
));
5391 finish_expr_stmt (init
);
5393 if (flag_threadsafe_statics
)
5395 finish_compound_stmt (inner_then_clause
);
5396 finish_then_clause (inner_if_stmt
);
5397 finish_if_stmt (inner_if_stmt
);
5400 finish_compound_stmt (then_clause
);
5401 finish_then_clause (if_stmt
);
5402 finish_if_stmt (if_stmt
);
5405 static_aggregates
= tree_cons (init
, decl
, static_aggregates
);
5409 /* Make TYPE a complete type based on INITIAL_VALUE.
5410 Return 0 if successful, 1 if INITIAL_VALUE can't be deciphered,
5411 2 if there was no information (in which case assume 0 if DO_DEFAULT). */
5414 complete_array_type (tree type
, tree initial_value
, int do_default
)
5416 tree maxindex
= NULL_TREE
;
5421 /* An array of character type can be initialized from a
5422 brace-enclosed string constant. */
5423 if (char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (type
)))
5424 && TREE_CODE (initial_value
) == CONSTRUCTOR
5425 && CONSTRUCTOR_ELTS (initial_value
)
5426 && (TREE_CODE (TREE_VALUE (CONSTRUCTOR_ELTS (initial_value
)))
5428 && TREE_CHAIN (CONSTRUCTOR_ELTS (initial_value
)) == NULL_TREE
)
5429 initial_value
= TREE_VALUE (CONSTRUCTOR_ELTS (initial_value
));
5431 /* Note MAXINDEX is really the maximum index, one less than the
5433 if (TREE_CODE (initial_value
) == STRING_CST
)
5436 = int_size_in_bytes (TREE_TYPE (TREE_TYPE (initial_value
)));
5437 maxindex
= build_int_cst (NULL_TREE
,
5438 (TREE_STRING_LENGTH (initial_value
)
5441 else if (TREE_CODE (initial_value
) == CONSTRUCTOR
)
5443 tree elts
= CONSTRUCTOR_ELTS (initial_value
);
5445 maxindex
= ssize_int (-1);
5446 for (; elts
; elts
= TREE_CHAIN (elts
))
5448 if (TREE_PURPOSE (elts
))
5449 maxindex
= TREE_PURPOSE (elts
);
5451 maxindex
= size_binop (PLUS_EXPR
, maxindex
, ssize_int (1));
5456 /* Make an error message unless that happened already. */
5457 if (initial_value
!= error_mark_node
)
5460 initial_value
= NULL_TREE
;
5462 /* Prevent further error messages. */
5463 maxindex
= build_int_cst (NULL_TREE
, 0);
5470 maxindex
= build_int_cst (NULL_TREE
, 0);
5480 domain
= build_index_type (maxindex
);
5481 TYPE_DOMAIN (type
) = domain
;
5484 itype
= TREE_TYPE (initial_value
);
5487 if (itype
&& !TYPE_DOMAIN (itype
))
5488 TYPE_DOMAIN (itype
) = domain
;
5489 /* The type of the main variant should never be used for arrays
5490 of different sizes. It should only ever be completed with the
5491 size of the array. */
5492 if (! TYPE_DOMAIN (TYPE_MAIN_VARIANT (type
)))
5493 TYPE_DOMAIN (TYPE_MAIN_VARIANT (type
)) = domain
;
5495 elt_type
= TREE_TYPE (type
);
5496 TYPE_NEEDS_CONSTRUCTING (type
)
5497 = TYPE_NEEDS_CONSTRUCTING (TYPE_MAIN_VARIANT (elt_type
));
5498 TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type
)
5499 = TYPE_HAS_NONTRIVIAL_DESTRUCTOR (TYPE_MAIN_VARIANT (elt_type
));
5502 /* Lay out the type now that we can get the real answer. */
5509 /* Return zero if something is declared to be a member of type
5510 CTYPE when in the context of CUR_TYPE. STRING is the error
5511 message to print in that case. Otherwise, quietly return 1. */
5514 member_function_or_else (tree ctype
, tree cur_type
, enum overload_flags flags
)
5516 if (ctype
&& ctype
!= cur_type
)
5518 if (flags
== DTOR_FLAG
)
5519 error ("destructor for alien class %qT cannot be a member", ctype
);
5521 error ("constructor for alien class %qT cannot be a member", ctype
);
5527 /* Subroutine of `grokdeclarator'. */
5529 /* Generate errors possibly applicable for a given set of specifiers.
5530 This is for ARM $7.1.2. */
5533 bad_specifiers (tree object
,
5542 error ("%qD declared as a %<virtual%> %s", object
, type
);
5544 error ("%qD declared as an %<inline%> %s", object
, type
);
5546 error ("%<const%> and %<volatile%> function specifiers on "
5547 "%qD invalid in %s declaration",
5550 cp_error_at ("%qD declared as a friend", object
);
5552 && (TREE_CODE (object
) == TYPE_DECL
5553 || (!TYPE_PTRFN_P (TREE_TYPE (object
))
5554 && !TYPE_REFFN_P (TREE_TYPE (object
))
5555 && !TYPE_PTRMEMFUNC_P (TREE_TYPE (object
)))))
5556 cp_error_at ("%qD declared with an exception specification", object
);
5559 /* CTYPE is class type, or null if non-class.
5560 TYPE is type this FUNCTION_DECL should have, either FUNCTION_TYPE
5562 DECLARATOR is the function's name.
5563 PARMS is a chain of PARM_DECLs for the function.
5564 VIRTUALP is truthvalue of whether the function is virtual or not.
5565 FLAGS are to be passed through to `grokclassfn'.
5566 QUALS are qualifiers indicating whether the function is `const'
5568 RAISES is a list of exceptions that this function can raise.
5569 CHECK is 1 if we must find this method in CTYPE, 0 if we should
5570 not look, and -1 if we should not call `grokclassfn' at all.
5572 Returns `NULL_TREE' if something goes wrong, after issuing
5573 applicable error messages. */
5576 grokfndecl (tree ctype
,
5580 tree orig_declarator
,
5582 enum overload_flags flags
,
5595 int staticp
= ctype
&& TREE_CODE (type
) == FUNCTION_TYPE
;
5596 int has_default_arg
= 0;
5600 type
= build_exception_variant (type
, raises
);
5602 decl
= build_lang_decl (FUNCTION_DECL
, declarator
, type
);
5603 DECL_ARGUMENTS (decl
) = parms
;
5604 /* Propagate volatile out from type to decl. */
5605 if (TYPE_VOLATILE (type
))
5606 TREE_THIS_VOLATILE (decl
) = 1;
5608 /* If this decl has namespace scope, set that up. */
5610 set_decl_namespace (decl
, in_namespace
, friendp
);
5612 DECL_CONTEXT (decl
) = FROB_CONTEXT (current_namespace
);
5614 /* `main' and builtins have implicit 'C' linkage. */
5615 if ((MAIN_NAME_P (declarator
)
5616 || (IDENTIFIER_LENGTH (declarator
) > 10
5617 && IDENTIFIER_POINTER (declarator
)[0] == '_'
5618 && IDENTIFIER_POINTER (declarator
)[1] == '_'
5619 && strncmp (IDENTIFIER_POINTER (declarator
)+2, "builtin_", 8) == 0))
5620 && current_lang_name
== lang_name_cplusplus
5621 && ctype
== NULL_TREE
5622 /* NULL_TREE means global namespace. */
5623 && DECL_CONTEXT (decl
) == NULL_TREE
)
5624 SET_DECL_LANGUAGE (decl
, lang_c
);
5626 /* Should probably propagate const out from type to decl I bet (mrs). */
5629 DECL_STATIC_FUNCTION_P (decl
) = 1;
5630 DECL_CONTEXT (decl
) = ctype
;
5634 DECL_CONTEXT (decl
) = ctype
;
5636 if (ctype
== NULL_TREE
&& DECL_MAIN_P (decl
))
5638 if (processing_template_decl
)
5639 error ("cannot declare %<::main%> to be a template");
5641 error ("cannot declare %<::main%> to be inline");
5643 error ("cannot declare %<::main%> to be static");
5644 if (!same_type_p (TREE_TYPE (TREE_TYPE (decl
)),
5647 error ("%<::main%> must return %<int%>");
5648 TREE_TYPE (TREE_TYPE (decl
)) = integer_type_node
;
5654 /* Members of anonymous types and local classes have no linkage; make
5655 them internal. If a typedef is made later, this will be changed. */
5656 if (ctype
&& (TYPE_ANONYMOUS_P (ctype
)
5657 || decl_function_context (TYPE_MAIN_DECL (ctype
))))
5662 /* [basic.link]: A name with no linkage (notably, the name of a class
5663 or enumeration declared in a local scope) shall not be used to
5664 declare an entity with linkage.
5666 Only check this for public decls for now. See core 319, 389. */
5667 t
= no_linkage_check (TREE_TYPE (decl
),
5668 /*relaxed_p=*/false);
5671 if (TYPE_ANONYMOUS_P (t
))
5673 if (DECL_EXTERN_C_P (decl
))
5674 /* Allow this; it's pretty common in C. */;
5677 pedwarn ("non-local function %q#D uses anonymous type",
5679 if (DECL_ORIGINAL_TYPE (TYPE_NAME (t
)))
5680 cp_pedwarn_at ("%q#D does not refer to the unqualified "
5681 "type, so it is not used for linkage",
5686 pedwarn ("non-local function %q#D uses local type %qT", decl
, t
);
5690 TREE_PUBLIC (decl
) = publicp
;
5693 DECL_INTERFACE_KNOWN (decl
) = 1;
5694 DECL_NOT_REALLY_EXTERN (decl
) = 1;
5697 /* If the declaration was declared inline, mark it as such. */
5699 DECL_DECLARED_INLINE_P (decl
) = 1;
5700 /* We inline functions that are explicitly declared inline, or, when
5701 the user explicitly asks us to, all functions. */
5702 if (DECL_DECLARED_INLINE_P (decl
)
5703 || (flag_inline_trees
== 2 && !DECL_INLINE (decl
) && funcdef_flag
))
5704 DECL_INLINE (decl
) = 1;
5706 DECL_EXTERNAL (decl
) = 1;
5707 if (quals
&& TREE_CODE (type
) == FUNCTION_TYPE
)
5709 error ("%smember function %qD cannot have cv-qualifier",
5710 (ctype
? "static " : "non-"), decl
);
5711 quals
= TYPE_UNQUALIFIED
;
5714 if (IDENTIFIER_OPNAME_P (DECL_NAME (decl
)))
5715 grok_op_properties (decl
, friendp
, /*complain=*/true);
5717 if (ctype
&& decl_function_context (decl
))
5718 DECL_NO_STATIC_CHAIN (decl
) = 1;
5720 for (t
= TYPE_ARG_TYPES (TREE_TYPE (decl
)); t
; t
= TREE_CHAIN (t
))
5721 if (TREE_PURPOSE (t
)
5722 && TREE_CODE (TREE_PURPOSE (t
)) == DEFAULT_ARG
)
5724 has_default_arg
= 1;
5729 && TREE_CODE (orig_declarator
) == TEMPLATE_ID_EXPR
)
5733 ("defining explicit specialization %qD in friend declaration",
5737 tree fns
= TREE_OPERAND (orig_declarator
, 0);
5738 tree args
= TREE_OPERAND (orig_declarator
, 1);
5740 if (PROCESSING_REAL_TEMPLATE_DECL_P ())
5742 /* Something like `template <class T> friend void f<T>()'. */
5743 error ("invalid use of template-id %qD in declaration "
5744 "of primary template",
5750 /* A friend declaration of the form friend void f<>(). Record
5751 the information in the TEMPLATE_ID_EXPR. */
5752 SET_DECL_IMPLICIT_INSTANTIATION (decl
);
5754 if (TREE_CODE (fns
) == COMPONENT_REF
)
5756 /* Due to bison parser ickiness, we will have already looked
5757 up an operator_name or PFUNCNAME within the current class
5758 (see template_id in parse.y). If the current class contains
5759 such a name, we'll get a COMPONENT_REF here. Undo that. */
5761 gcc_assert (TREE_TYPE (TREE_OPERAND (fns
, 0))
5762 == current_class_type
);
5763 fns
= TREE_OPERAND (fns
, 1);
5765 gcc_assert (TREE_CODE (fns
) == IDENTIFIER_NODE
5766 || TREE_CODE (fns
) == OVERLOAD
);
5767 DECL_TEMPLATE_INFO (decl
) = tree_cons (fns
, args
, NULL_TREE
);
5769 if (has_default_arg
)
5771 error ("default arguments are not allowed in declaration "
5772 "of friend template specialization %qD",
5779 error ("%<inline%> is not allowed in declaration of friend "
5780 "template specialization %qD",
5788 /* Make the init_value nonzero so pushdecl knows this is not
5789 tentative. error_mark_node is replaced later with the BLOCK. */
5790 DECL_INITIAL (decl
) = error_mark_node
;
5792 if (TYPE_NOTHROW_P (type
) || nothrow_libfn_p (decl
))
5793 TREE_NOTHROW (decl
) = 1;
5795 /* Caller will do the rest of this. */
5799 if (flags
== NO_SPECIAL
&& ctype
&& constructor_name_p (declarator
, ctype
))
5800 DECL_CONSTRUCTOR_P (decl
) = 1;
5802 /* Function gets the ugly name, field gets the nice one. This call
5803 may change the type of the function (because of default
5805 if (ctype
!= NULL_TREE
)
5806 grokclassfn (ctype
, decl
, flags
, quals
);
5808 decl
= check_explicit_specialization (orig_declarator
, decl
,
5810 2 * (funcdef_flag
!= 0) +
5811 4 * (friendp
!= 0));
5812 if (decl
== error_mark_node
)
5817 cplus_decl_attributes (&decl
, *attrlist
, 0);
5818 *attrlist
= NULL_TREE
;
5821 if (ctype
!= NULL_TREE
5822 && (! TYPE_FOR_JAVA (ctype
) || check_java_method (decl
))
5827 old_decl
= check_classfn (ctype
, decl
,
5828 (processing_template_decl
5829 > template_class_depth (ctype
))
5830 ? current_template_parms
5833 if (old_decl
&& TREE_CODE (old_decl
) == TEMPLATE_DECL
)
5834 /* Because grokfndecl is always supposed to return a
5835 FUNCTION_DECL, we pull out the DECL_TEMPLATE_RESULT
5836 here. We depend on our callers to figure out that its
5837 really a template that's being returned. */
5838 old_decl
= DECL_TEMPLATE_RESULT (old_decl
);
5840 if (old_decl
&& DECL_STATIC_FUNCTION_P (old_decl
)
5841 && TREE_CODE (TREE_TYPE (decl
)) == METHOD_TYPE
)
5842 /* Remove the `this' parm added by grokclassfn.
5843 XXX Isn't this done in start_function, too? */
5844 revert_static_member_fn (decl
);
5845 if (old_decl
&& DECL_ARTIFICIAL (old_decl
))
5846 error ("definition of implicitly-declared %qD", old_decl
);
5853 /* Since we've smashed OLD_DECL to its
5854 DECL_TEMPLATE_RESULT, we must do the same to DECL. */
5855 if (TREE_CODE (decl
) == TEMPLATE_DECL
)
5856 decl
= DECL_TEMPLATE_RESULT (decl
);
5858 /* Attempt to merge the declarations. This can fail, in
5859 the case of some invalid specialization declarations. */
5860 pop_p
= push_scope (ctype
);
5861 ok
= duplicate_decls (decl
, old_decl
);
5866 error ("no %q#D member function declared in class %qT",
5874 if (DECL_CONSTRUCTOR_P (decl
) && !grok_ctor_properties (ctype
, decl
))
5877 if (ctype
== NULL_TREE
|| check
)
5881 DECL_VIRTUAL_P (decl
) = 1;
5886 /* DECL is a VAR_DECL for a static data member. Set flags to reflect
5887 the linkage that DECL will receive in the object file. */
5890 set_linkage_for_static_data_member (tree decl
)
5892 /* A static data member always has static storage duration and
5893 external linkage. Note that static data members are forbidden in
5894 local classes -- the only situation in which a class has
5895 non-external linkage. */
5896 TREE_PUBLIC (decl
) = 1;
5897 TREE_STATIC (decl
) = 1;
5898 /* For non-template classes, static data members are always put
5899 out in exactly those files where they are defined, just as
5900 with ordinary namespace-scope variables. */
5901 if (!processing_template_decl
)
5902 DECL_INTERFACE_KNOWN (decl
) = 1;
5905 /* Create a VAR_DECL named NAME with the indicated TYPE.
5907 If SCOPE is non-NULL, it is the class type or namespace containing
5908 the variable. If SCOPE is NULL, the variable should is created in
5909 the innermost enclosings scope. */
5912 grokvardecl (tree type
,
5914 const cp_decl_specifier_seq
*declspecs
,
5921 gcc_assert (!name
|| TREE_CODE (name
) == IDENTIFIER_NODE
);
5923 /* Compute the scope in which to place the variable. */
5926 /* An explicit "extern" specifier indicates a namespace-scope
5928 if (declspecs
->storage_class
== sc_extern
)
5929 scope
= current_namespace
;
5930 else if (!at_function_scope_p ())
5931 scope
= current_scope ();
5935 && (/* If the variable is a namespace-scope variable declared in a
5936 template, we need DECL_LANG_SPECIFIC. */
5937 (TREE_CODE (scope
) == NAMESPACE_DECL
&& processing_template_decl
)
5938 /* Similarly for namespace-scope variables with language linkage
5940 || (TREE_CODE (scope
) == NAMESPACE_DECL
5941 && current_lang_name
!= lang_name_cplusplus
)
5942 /* Similarly for static data members. */
5944 decl
= build_lang_decl (VAR_DECL
, name
, type
);
5946 decl
= build_decl (VAR_DECL
, name
, type
);
5948 if (scope
&& TREE_CODE (scope
) == NAMESPACE_DECL
)
5949 set_decl_namespace (decl
, scope
, 0);
5951 DECL_CONTEXT (decl
) = scope
;
5953 if (declspecs
->storage_class
== sc_extern
)
5955 DECL_THIS_EXTERN (decl
) = 1;
5956 DECL_EXTERNAL (decl
) = !initialized
;
5959 if (DECL_CLASS_SCOPE_P (decl
))
5961 set_linkage_for_static_data_member (decl
);
5962 /* This function is only called with out-of-class definitions. */
5963 DECL_EXTERNAL (decl
) = 0;
5965 /* At top level, either `static' or no s.c. makes a definition
5966 (perhaps tentative), and absence of `static' makes it public. */
5967 else if (toplevel_bindings_p ())
5969 TREE_PUBLIC (decl
) = (declspecs
->storage_class
!= sc_static
5970 && (DECL_THIS_EXTERN (decl
) || ! constp
));
5971 TREE_STATIC (decl
) = ! DECL_EXTERNAL (decl
);
5973 /* Not at top level, only `static' makes a static definition. */
5976 TREE_STATIC (decl
) = declspecs
->storage_class
== sc_static
;
5977 TREE_PUBLIC (decl
) = DECL_EXTERNAL (decl
);
5980 if (declspecs
->specs
[(int)ds_thread
])
5982 if (targetm
.have_tls
)
5983 DECL_THREAD_LOCAL (decl
) = 1;
5985 /* A mere warning is sure to result in improper semantics
5986 at runtime. Don't bother to allow this to compile. */
5987 error ("thread-local storage not supported for this target");
5990 if (TREE_PUBLIC (decl
))
5992 /* [basic.link]: A name with no linkage (notably, the name of a class
5993 or enumeration declared in a local scope) shall not be used to
5994 declare an entity with linkage.
5996 Only check this for public decls for now. */
5997 tree t1
= TREE_TYPE (decl
);
5998 tree t
= no_linkage_check (t1
, /*relaxed_p=*/false);
6001 if (TYPE_ANONYMOUS_P (t
))
6003 if (DECL_EXTERN_C_P (decl
))
6004 /* Allow this; it's pretty common in C. */
6006 else if (same_type_ignoring_top_level_qualifiers_p(t1
, t
))
6007 /* This is something like "enum { a = 3 } x;", which is
6008 well formed. The enum doesn't have "a name with no
6009 linkage", because it has no name. See closed CWG issue
6012 Note that while this construct is well formed in C++03
6013 it is likely to become ill formed in C++0x. See open
6014 CWG issue 389 and related issues. */
6018 /* It's a typedef referring to an anonymous type. */
6019 pedwarn ("non-local variable %q#D uses anonymous type",
6021 if (DECL_ORIGINAL_TYPE (TYPE_NAME (t
)))
6022 cp_pedwarn_at ("%q#D does not refer to the unqualified "
6023 "type, so it is not used for linkage",
6028 pedwarn ("non-local variable %q#D uses local type %qT", decl
, t
);
6035 /* Create and return a canonical pointer to member function type, for
6036 TYPE, which is a POINTER_TYPE to a METHOD_TYPE. */
6039 build_ptrmemfunc_type (tree type
)
6043 tree unqualified_variant
= NULL_TREE
;
6045 if (type
== error_mark_node
)
6048 /* If a canonical type already exists for this type, use it. We use
6049 this method instead of type_hash_canon, because it only does a
6050 simple equality check on the list of field members. */
6052 if ((t
= TYPE_GET_PTRMEMFUNC_TYPE (type
)))
6055 /* Make sure that we always have the unqualified pointer-to-member
6057 if (cp_type_quals (type
) != TYPE_UNQUALIFIED
)
6059 = build_ptrmemfunc_type (TYPE_MAIN_VARIANT (type
));
6061 t
= make_aggr_type (RECORD_TYPE
);
6062 xref_basetypes (t
, NULL_TREE
);
6064 /* Let the front-end know this is a pointer to member function... */
6065 TYPE_PTRMEMFUNC_FLAG (t
) = 1;
6066 /* ... and not really an aggregate. */
6067 SET_IS_AGGR_TYPE (t
, 0);
6069 field
= build_decl (FIELD_DECL
, pfn_identifier
, type
);
6072 field
= build_decl (FIELD_DECL
, delta_identifier
, delta_type_node
);
6073 TREE_CHAIN (field
) = fields
;
6076 finish_builtin_struct (t
, "__ptrmemfunc_type", fields
, ptr_type_node
);
6078 /* Zap out the name so that the back-end will give us the debugging
6079 information for this anonymous RECORD_TYPE. */
6080 TYPE_NAME (t
) = NULL_TREE
;
6082 /* If this is not the unqualified form of this pointer-to-member
6083 type, set the TYPE_MAIN_VARIANT for this type to be the
6084 unqualified type. Since they are actually RECORD_TYPEs that are
6085 not variants of each other, we must do this manually. */
6086 if (cp_type_quals (type
) != TYPE_UNQUALIFIED
)
6088 t
= build_qualified_type (t
, cp_type_quals (type
));
6089 TYPE_MAIN_VARIANT (t
) = unqualified_variant
;
6090 TYPE_NEXT_VARIANT (t
) = TYPE_NEXT_VARIANT (unqualified_variant
);
6091 TYPE_NEXT_VARIANT (unqualified_variant
) = t
;
6094 /* Cache this pointer-to-member type so that we can find it again
6096 TYPE_SET_PTRMEMFUNC_TYPE (type
, t
);
6101 /* Create and return a pointer to data member type. */
6104 build_ptrmem_type (tree class_type
, tree member_type
)
6106 if (TREE_CODE (member_type
) == METHOD_TYPE
)
6110 arg_types
= TYPE_ARG_TYPES (member_type
);
6111 class_type
= (cp_build_qualified_type
6113 cp_type_quals (TREE_TYPE (TREE_VALUE (arg_types
)))));
6115 = build_method_type_directly (class_type
,
6116 TREE_TYPE (member_type
),
6117 TREE_CHAIN (arg_types
));
6118 return build_ptrmemfunc_type (build_pointer_type (member_type
));
6122 gcc_assert (TREE_CODE (member_type
) != FUNCTION_TYPE
);
6123 return build_offset_type (class_type
, member_type
);
6127 /* DECL is a VAR_DECL defined in-class, whose TYPE is also given.
6128 Check to see that the definition is valid. Issue appropriate error
6129 messages. Return 1 if the definition is particularly bad, or 0
6133 check_static_variable_definition (tree decl
, tree type
)
6135 /* Motion 10 at San Diego: If a static const integral data member is
6136 initialized with an integral constant expression, the initializer
6137 may appear either in the declaration (within the class), or in
6138 the definition, but not both. If it appears in the class, the
6139 member is a member constant. The file-scope definition is always
6141 if (!ARITHMETIC_TYPE_P (type
) && TREE_CODE (type
) != ENUMERAL_TYPE
)
6143 error ("invalid in-class initialization of static data member "
6144 "of non-integral type %qT",
6146 /* If we just return the declaration, crashes will sometimes
6147 occur. We therefore return void_type_node, as if this were a
6148 friend declaration, to cause callers to completely ignore
6149 this declaration. */
6152 else if (!CP_TYPE_CONST_P (type
))
6153 error ("ISO C++ forbids in-class initialization of non-const "
6154 "static member %qD",
6156 else if (pedantic
&& !INTEGRAL_TYPE_P (type
))
6157 pedwarn ("ISO C++ forbids initialization of member constant "
6158 "%qD of non-integral type %qT", decl
, type
);
6163 /* Given the SIZE (i.e., number of elements) in an array, compute an
6164 appropriate index type for the array. If non-NULL, NAME is the
6165 name of the thing being declared. */
6168 compute_array_index_type (tree name
, tree size
)
6170 tree type
= TREE_TYPE (size
);
6173 /* The array bound must be an integer type. */
6174 if (!dependent_type_p (type
) && !INTEGRAL_TYPE_P (type
))
6177 error ("size of array %qD has non-integral type %qT", name
, type
);
6179 error ("size of array has non-integral type %qT", type
);
6180 size
= integer_one_node
;
6181 type
= TREE_TYPE (size
);
6184 if (abi_version_at_least (2)
6185 /* We should only handle value dependent expressions specially. */
6186 ? value_dependent_expression_p (size
)
6187 /* But for abi-1, we handled all instances in templates. This
6188 effects the manglings produced. */
6189 : processing_template_decl
)
6190 return build_index_type (build_min (MINUS_EXPR
, sizetype
,
6191 size
, integer_one_node
));
6193 /* The size might be the result of a cast. */
6194 STRIP_TYPE_NOPS (size
);
6196 /* It might be a const variable or enumeration constant. */
6197 size
= decl_constant_value (size
);
6199 /* Normally, the array-bound will be a constant. */
6200 if (TREE_CODE (size
) == INTEGER_CST
)
6202 /* Check to see if the array bound overflowed. Make that an
6203 error, no matter how generous we're being. */
6204 int old_flag_pedantic_errors
= flag_pedantic_errors
;
6205 int old_pedantic
= pedantic
;
6206 pedantic
= flag_pedantic_errors
= 1;
6207 constant_expression_warning (size
);
6208 pedantic
= old_pedantic
;
6209 flag_pedantic_errors
= old_flag_pedantic_errors
;
6211 /* An array must have a positive number of elements. */
6212 if (INT_CST_LT (size
, integer_zero_node
))
6215 error ("size of array %qD is negative", name
);
6217 error ("size of array is negative");
6218 size
= integer_one_node
;
6220 /* As an extension we allow zero-sized arrays. We always allow
6221 them in system headers because glibc uses them. */
6222 else if (integer_zerop (size
) && pedantic
&& !in_system_header
)
6225 pedwarn ("ISO C++ forbids zero-size array %qD", name
);
6227 pedwarn ("ISO C++ forbids zero-size array");
6230 else if (TREE_CONSTANT (size
))
6232 /* `(int) &fn' is not a valid array bound. */
6234 error ("size of array %qD is not an integral constant-expression",
6237 error ("size of array is not an integral constant-expression");
6242 pedwarn ("ISO C++ forbids variable-size array %qD", name
);
6244 pedwarn ("ISO C++ forbids variable-size array");
6247 if (processing_template_decl
&& !TREE_CONSTANT (size
))
6248 /* A variable sized array. */
6249 itype
= build_min (MINUS_EXPR
, sizetype
, size
, integer_one_node
);
6252 HOST_WIDE_INT saved_processing_template_decl
;
6254 /* Compute the index of the largest element in the array. It is
6255 one less than the number of elements in the array. We save
6256 and restore PROCESSING_TEMPLATE_DECL so that computations in
6257 cp_build_binary_op will be appropriately folded. */
6258 saved_processing_template_decl
= processing_template_decl
;
6259 processing_template_decl
= 0;
6260 itype
= cp_build_binary_op (MINUS_EXPR
,
6261 cp_convert (ssizetype
, size
),
6262 cp_convert (ssizetype
, integer_one_node
));
6263 itype
= fold (itype
);
6264 processing_template_decl
= saved_processing_template_decl
;
6266 if (!TREE_CONSTANT (itype
))
6267 /* A variable sized array. */
6268 itype
= variable_size (itype
);
6269 /* Make sure that there was no overflow when creating to a signed
6270 index type. (For example, on a 32-bit machine, an array with
6271 size 2^32 - 1 is too big.) */
6272 else if (TREE_OVERFLOW (itype
))
6274 error ("overflow in array dimension");
6275 TREE_OVERFLOW (itype
) = 0;
6279 /* Create and return the appropriate index type. */
6280 return build_index_type (itype
);
6283 /* Returns the scope (if any) in which the entity declared by
6284 DECLARATOR will be located. If the entity was declared with an
6285 unqualified name, NULL_TREE is returned. */
6288 get_scope_of_declarator (const cp_declarator
*declarator
)
6290 while (declarator
&& declarator
->kind
!= cdk_id
)
6291 declarator
= declarator
->declarator
;
6293 /* If the declarator-id is a SCOPE_REF, the scope in which the
6294 declaration occurs is the first operand. */
6296 && declarator
->u
.id
.name
6297 && TREE_CODE (declarator
->u
.id
.name
) == SCOPE_REF
)
6298 return TREE_OPERAND (declarator
->u
.id
.name
, 0);
6300 /* Otherwise, the declarator is not a qualified name; the entity will
6301 be declared in the current scope. */
6305 /* Returns an ARRAY_TYPE for an array with SIZE elements of the
6306 indicated TYPE. If non-NULL, NAME is the NAME of the declaration
6310 create_array_type_for_decl (tree name
, tree type
, tree size
)
6312 tree itype
= NULL_TREE
;
6313 const char* error_msg
;
6315 /* If things have already gone awry, bail now. */
6316 if (type
== error_mark_node
|| size
== error_mark_node
)
6317 return error_mark_node
;
6319 /* Assume that everything will go OK. */
6322 /* There are some types which cannot be array elements. */
6323 switch (TREE_CODE (type
))
6326 error_msg
= "array of void";
6330 error_msg
= "array of functions";
6333 case REFERENCE_TYPE
:
6334 error_msg
= "array of references";
6338 error_msg
= "array of function members";
6345 /* If something went wrong, issue an error-message and return. */
6349 error ("declaration of %qD as %s", name
, error_msg
);
6351 error ("creating %s", error_msg
);
6353 return error_mark_node
;
6358 The constant expressions that specify the bounds of the arrays
6359 can be omitted only for the first member of the sequence. */
6360 if (TREE_CODE (type
) == ARRAY_TYPE
&& !TYPE_DOMAIN (type
))
6363 error ("declaration of %qD as multidimensional array must "
6364 "have bounds for all dimensions except the first",
6367 error ("multidimensional array must have bounds for all "
6368 "dimensions except the first");
6370 return error_mark_node
;
6373 /* Figure out the index type for the array. */
6375 itype
= compute_array_index_type (name
, size
);
6378 T is called the array element type; this type shall not be [...] an
6379 abstract class type. */
6380 abstract_virtuals_error (name
, type
);
6382 return build_cplus_array_type (type
, itype
);
6385 /* Check that it's OK to declare a function with the indicated TYPE.
6386 SFK indicates the kind of special function (if any) that this
6387 function is. OPTYPE is the type given in a conversion operator
6388 declaration, or the class type for a constructor/destructor.
6389 Returns the actual return type of the function; that
6390 may be different than TYPE if an error occurs, or for certain
6391 special functions. */
6394 check_special_function_return_type (special_function_kind sfk
,
6400 case sfk_constructor
:
6402 error ("return type specification for constructor invalid");
6404 if (targetm
.cxx
.cdtor_returns_this () && !TYPE_FOR_JAVA (optype
))
6405 type
= build_pointer_type (optype
);
6407 type
= void_type_node
;
6410 case sfk_destructor
:
6412 error ("return type specification for destructor invalid");
6413 /* We can't use the proper return type here because we run into
6414 problems with ambiguous bases and covariant returns.
6415 Java classes are left unchanged because (void *) isn't a valid
6416 Java type, and we don't want to change the Java ABI. */
6417 if (targetm
.cxx
.cdtor_returns_this () && !TYPE_FOR_JAVA (optype
))
6418 type
= build_pointer_type (void_type_node
);
6420 type
= void_type_node
;
6423 case sfk_conversion
:
6424 if (type
&& !same_type_p (type
, optype
))
6425 error ("operator %qT declared to return %qT", optype
, type
);
6427 pedwarn ("return type specified for %<operator %T%>", optype
);
6438 /* A variable or data member (whose unqualified name is IDENTIFIER)
6439 has been declared with the indicated TYPE. If the TYPE is not
6440 acceptable, issue an error message and return a type to use for
6441 error-recovery purposes. */
6444 check_var_type (tree identifier
, tree type
)
6446 if (VOID_TYPE_P (type
))
6449 error ("unnamed variable or field declared void");
6450 else if (TREE_CODE (identifier
) == IDENTIFIER_NODE
)
6452 gcc_assert (!IDENTIFIER_OPNAME_P (identifier
));
6453 error ("variable or field %qE declared void", identifier
);
6456 error ("variable or field declared void");
6457 type
= integer_type_node
;
6463 /* Given declspecs and a declarator (abstract or otherwise), determine
6464 the name and type of the object declared and construct a DECL node
6467 DECLSPECS is a chain of tree_list nodes whose value fields
6468 are the storage classes and type specifiers.
6470 DECL_CONTEXT says which syntactic context this declaration is in:
6471 NORMAL for most contexts. Make a VAR_DECL or FUNCTION_DECL or TYPE_DECL.
6472 FUNCDEF for a function definition. Like NORMAL but a few different
6473 error messages in each case. Return value may be zero meaning
6474 this definition is too screwy to try to parse.
6475 MEMFUNCDEF for a function definition. Like FUNCDEF but prepares to
6476 handle member functions (which have FIELD context).
6477 Return value may be zero meaning this definition is too screwy to
6479 PARM for a parameter declaration (either within a function prototype
6480 or before a function body). Make a PARM_DECL, or return void_type_node.
6481 CATCHPARM for a parameter declaration before a catch clause.
6482 TYPENAME if for a typename (in a cast or sizeof).
6483 Don't make a DECL node; just return the ..._TYPE node.
6484 FIELD for a struct or union field; make a FIELD_DECL.
6485 BITFIELD for a field with specified width.
6486 INITIALIZED is 1 if the decl has an initializer.
6488 ATTRLIST is a pointer to the list of attributes, which may be NULL
6489 if there are none; *ATTRLIST may be modified if attributes from inside
6490 the declarator should be applied to the declaration.
6492 When this function is called, scoping variables (such as
6493 CURRENT_CLASS_TYPE) should reflect the scope in which the
6494 declaration occurs, not the scope in which the new declaration will
6495 be placed. For example, on:
6499 when grokdeclarator is called for `S::f', the CURRENT_CLASS_TYPE
6500 should not be `S'. */
6503 grokdeclarator (const cp_declarator
*declarator
,
6504 const cp_decl_specifier_seq
*declspecs
,
6505 enum decl_context decl_context
,
6509 tree type
= NULL_TREE
;
6512 int virtualp
, explicitp
, friendp
, inlinep
, staticp
;
6513 int explicit_int
= 0;
6514 int explicit_char
= 0;
6515 int defaulted_int
= 0;
6516 tree dependant_name
= NULL_TREE
;
6518 tree typedef_decl
= NULL_TREE
;
6519 const char *name
= NULL
;
6520 tree typedef_type
= NULL_TREE
;
6521 int funcdef_flag
= 0;
6522 cp_declarator_kind innermost_code
= cdk_error
;
6525 /* See the code below that used this. */
6526 tree decl_attr
= NULL_TREE
;
6529 /* Keep track of what sort of function is being processed
6530 so that we can warn about default return values, or explicit
6531 return values which do not match prescribed defaults. */
6532 special_function_kind sfk
= sfk_none
;
6534 tree dname
= NULL_TREE
;
6535 tree ctor_return_type
= NULL_TREE
;
6536 enum overload_flags flags
= NO_SPECIAL
;
6537 cp_cv_quals quals
= TYPE_UNQUALIFIED
;
6538 tree raises
= NULL_TREE
;
6539 int template_count
= 0;
6540 tree returned_attrs
= NULL_TREE
;
6541 tree parms
= NULL_TREE
;
6542 const cp_declarator
*id_declarator
;
6543 /* The unqualified name of the declarator; either an
6544 IDENTIFIER_NODE, BIT_NOT_EXPR, or TEMPLATE_ID_EXPR. */
6545 tree unqualified_id
;
6546 /* The class type, if any, in which this entity is located,
6547 or NULL_TREE if none. Note that this value may be different from
6548 the current class type; for example if an attempt is made to declare
6549 "A::f" inside "B", this value will be "A". */
6550 tree ctype
= current_class_type
;
6551 /* The NAMESPACE_DECL for the namespace in which this entity is
6552 located. If an unqualified name is used to declare the entity,
6553 this value will be NULL_TREE, even if the entity is located at
6555 tree in_namespace
= NULL_TREE
;
6557 cp_storage_class storage_class
;
6558 bool unsigned_p
, signed_p
, short_p
, long_p
, thread_p
;
6559 bool type_was_error_mark_node
= false;
6561 signed_p
= declspecs
->specs
[(int)ds_signed
];
6562 unsigned_p
= declspecs
->specs
[(int)ds_unsigned
];
6563 short_p
= declspecs
->specs
[(int)ds_short
];
6564 long_p
= declspecs
->specs
[(int)ds_long
];
6565 thread_p
= declspecs
->specs
[(int)ds_thread
];
6567 if (decl_context
== FUNCDEF
)
6568 funcdef_flag
= 1, decl_context
= NORMAL
;
6569 else if (decl_context
== MEMFUNCDEF
)
6570 funcdef_flag
= -1, decl_context
= FIELD
;
6571 else if (decl_context
== BITFIELD
)
6572 bitfield
= 1, decl_context
= FIELD
;
6574 /* Look inside a declarator for the name being declared
6575 and get it as a string, for an error message. */
6576 for (id_declarator
= declarator
;
6578 id_declarator
= id_declarator
->declarator
)
6580 if (id_declarator
->kind
!= cdk_id
)
6581 innermost_code
= id_declarator
->kind
;
6583 switch (id_declarator
->kind
)
6586 if (id_declarator
->declarator
6587 && id_declarator
->declarator
->kind
== cdk_id
)
6589 sfk
= id_declarator
->declarator
->u
.id
.sfk
;
6590 if (sfk
== sfk_destructor
)
6597 tree decl
= id_declarator
->u
.id
.name
;
6600 if (TREE_CODE (decl
) == SCOPE_REF
)
6602 tree qualifying_scope
= TREE_OPERAND (decl
, 0);
6604 /* It is valid to write:
6606 class C { void f(); };
6610 The standard is not clear about whether `typedef const C D' is
6611 legal; as of 2002-09-15 the committee is considering
6612 that question. EDG 3.0 allows that syntax.
6613 Therefore, we do as well. */
6614 if (qualifying_scope
&& TYPE_P (qualifying_scope
))
6616 ctype
= TYPE_MAIN_VARIANT (qualifying_scope
);
6617 if (innermost_code
!= cdk_function
6618 && current_class_type
6619 && !UNIQUELY_DERIVED_FROM_P (ctype
,
6620 current_class_type
))
6622 error ("type %qT is not derived from type %qT",
6623 ctype
, current_class_type
);
6626 TREE_OPERAND (decl
, 0) = ctype
;
6628 else if (TREE_CODE (qualifying_scope
) == NAMESPACE_DECL
)
6629 in_namespace
= qualifying_scope
;
6630 decl
= TREE_OPERAND (decl
, 1);
6632 if (TREE_CODE (decl
) == BASELINK
)
6633 decl
= BASELINK_FUNCTIONS (decl
);
6634 if (decl
== error_mark_node
)
6635 return error_mark_node
;
6636 switch (TREE_CODE (decl
))
6640 tree type
= TREE_OPERAND (decl
, 0);
6641 type
= constructor_name (type
);
6642 name
= IDENTIFIER_POINTER (type
);
6646 case TEMPLATE_ID_EXPR
:
6648 tree fns
= TREE_OPERAND (decl
, 0);
6651 if (TREE_CODE (dname
) == COMPONENT_REF
)
6652 dname
= TREE_OPERAND (dname
, 1);
6653 if (TREE_CODE (dname
) != IDENTIFIER_NODE
)
6655 gcc_assert (is_overloaded_fn (dname
));
6656 dname
= DECL_NAME (get_first_fn (dname
));
6661 case IDENTIFIER_NODE
:
6662 if (TREE_CODE (decl
) == IDENTIFIER_NODE
)
6665 if (C_IS_RESERVED_WORD (dname
))
6667 error ("declarator-id missing; using reserved word %qD",
6669 name
= IDENTIFIER_POINTER (dname
);
6671 else if (!IDENTIFIER_TYPENAME_P (dname
))
6672 name
= IDENTIFIER_POINTER (dname
);
6675 gcc_assert (flags
== NO_SPECIAL
);
6676 flags
= TYPENAME_FLAG
;
6677 ctor_return_type
= TREE_TYPE (dname
);
6678 sfk
= sfk_conversion
;
6679 if (is_typename_at_global_scope (dname
))
6680 name
= IDENTIFIER_POINTER (dname
);
6682 name
= "<invalid operator>";
6687 dname
= constructor_name (TREE_TYPE (decl
));
6688 name
= IDENTIFIER_POINTER (dname
);
6709 if (id_declarator
->kind
== cdk_id
)
6713 /* A function definition's declarator must have the form of
6714 a function declarator. */
6716 if (funcdef_flag
&& innermost_code
!= cdk_function
)
6719 if (((dname
&& IDENTIFIER_OPNAME_P (dname
)) || flags
== TYPENAME_FLAG
)
6720 && innermost_code
!= cdk_function
6721 && ! (ctype
&& !declspecs
->any_specifiers_p
))
6723 error ("declaration of %qD as non-function", dname
);
6724 return void_type_node
;
6727 /* Anything declared one level down from the top level
6728 must be one of the parameters of a function
6729 (because the body is at least two levels down). */
6731 /* This heuristic cannot be applied to C++ nodes! Fixed, however,
6732 by not allowing C++ class definitions to specify their parameters
6733 with xdecls (must be spec.d in the parmlist).
6735 Since we now wait to push a class scope until we are sure that
6736 we are in a legitimate method context, we must set oldcname
6737 explicitly (since current_class_name is not yet alive).
6739 We also want to avoid calling this a PARM if it is in a namespace. */
6741 if (decl_context
== NORMAL
&& !toplevel_bindings_p ())
6743 struct cp_binding_level
*b
= current_binding_level
;
6744 current_binding_level
= b
->level_chain
;
6745 if (current_binding_level
!= 0 && toplevel_bindings_p ())
6746 decl_context
= PARM
;
6747 current_binding_level
= b
;
6751 name
= decl_context
== PARM
? "parameter" : "type name";
6753 /* If there were multiple types specified in the decl-specifier-seq,
6754 issue an error message. */
6755 if (declspecs
->multiple_types_p
)
6756 error ("two or more data types in declaration of %qs", name
);
6757 /* Extract the basic type from the decl-specifier-seq. */
6758 type
= declspecs
->type
;
6759 if (type
== error_mark_node
)
6762 type_was_error_mark_node
= true;
6764 /* If the entire declaration is itself tagged as deprecated then
6765 suppress reports of deprecated items. */
6766 if (type
&& TREE_DEPRECATED (type
)
6767 && deprecated_state
!= DEPRECATED_SUPPRESS
)
6768 warn_deprecated_use (type
);
6769 if (type
&& TREE_CODE (type
) == TYPE_DECL
)
6771 typedef_decl
= type
;
6772 type
= TREE_TYPE (typedef_decl
);
6774 /* No type at all: default to `int', and set DEFAULTED_INT
6775 because it was not a user-defined typedef. */
6776 if (type
== NULL_TREE
&& (signed_p
|| unsigned_p
|| long_p
|| short_p
))
6778 /* These imply 'int'. */
6779 type
= integer_type_node
;
6783 explicit_int
= declspecs
->explicit_int_p
;
6784 explicit_char
= declspecs
->explicit_char_p
;
6786 /* Check for repeated decl-specifiers. */
6787 for (ds
= ds_first
; ds
!= ds_last
; ++ds
)
6789 unsigned count
= declspecs
->specs
[(int)ds
];
6792 /* The "long" specifier is a special case because of
6797 error ("%<long long long%> is too long for GCC");
6798 else if (pedantic
&& !in_system_header
&& warn_long_long
)
6799 pedwarn ("ISO C++ does not support %<long long%>");
6803 else if (declspecs
->specs
[(int)ds
] > 1)
6805 static const char *const decl_spec_names
[] = {
6821 error ("duplicate %qs", decl_spec_names
[(int)ds
]);
6826 /* See the code below that used this. */
6828 decl_attr
= DECL_ATTRIBUTES (typedef_decl
);
6830 typedef_type
= type
;
6833 if (sfk
!= sfk_conversion
)
6834 ctor_return_type
= ctype
;
6836 if (sfk
!= sfk_none
)
6837 type
= check_special_function_return_type (sfk
, type
,
6839 else if (type
== NULL_TREE
)
6845 /* We handle `main' specially here, because 'main () { }' is so
6846 common. With no options, it is allowed. With -Wreturn-type,
6847 it is a warning. It is only an error with -pedantic-errors. */
6848 is_main
= (funcdef_flag
6849 && dname
&& MAIN_NAME_P (dname
)
6850 && ctype
== NULL_TREE
6851 && in_namespace
== NULL_TREE
6852 && current_namespace
== global_namespace
);
6854 if (type_was_error_mark_node
)
6855 /* We've already issued an error, don't complain more. */;
6856 else if (in_system_header
|| flag_ms_extensions
)
6857 /* Allow it, sigh. */;
6858 else if (pedantic
|| ! is_main
)
6859 pedwarn ("ISO C++ forbids declaration of %qs with no type", name
);
6860 else if (warn_return_type
)
6861 warning ("ISO C++ forbids declaration of %qs with no type", name
);
6863 type
= integer_type_node
;
6868 /* Now process the modifiers that were specified
6869 and check for invalid combinations. */
6871 /* Long double is a special combination. */
6872 if (long_p
&& TYPE_MAIN_VARIANT (type
) == double_type_node
)
6875 type
= build_qualified_type (long_double_type_node
,
6876 cp_type_quals (type
));
6879 /* Check all other uses of type modifiers. */
6881 if (unsigned_p
|| signed_p
|| long_p
|| short_p
)
6885 if (TREE_CODE (type
) == REAL_TYPE
)
6886 error ("short, signed or unsigned invalid for %qs", name
);
6887 else if (TREE_CODE (type
) != INTEGER_TYPE
)
6888 error ("long, short, signed or unsigned invalid for %qs", name
);
6889 else if (long_p
&& short_p
)
6890 error ("long and short specified together for %qs", name
);
6891 else if ((long_p
|| short_p
) && explicit_char
)
6892 error ("long or short specified with char for %qs", name
);
6893 else if ((long_p
|| short_p
) && TREE_CODE (type
) == REAL_TYPE
)
6894 error ("long or short specified with floating type for %qs", name
);
6895 else if (signed_p
&& unsigned_p
)
6896 error ("signed and unsigned given together for %qs", name
);
6900 if (!explicit_int
&& !defaulted_int
&& !explicit_char
&& pedantic
)
6902 pedwarn ("long, short, signed or unsigned used invalidly for %qs",
6904 if (flag_pedantic_errors
)
6909 /* Discard the type modifiers if they are invalid. */
6920 /* Decide whether an integer type is signed or not.
6921 Optionally treat bitfields as signed by default. */
6925 It is implementation-defined whether a plain (neither
6926 explicitly signed or unsigned) char, short, int, or long
6927 bit-field is signed or unsigned.
6929 Naturally, we extend this to long long as well. Note that
6930 this does not include wchar_t. */
6931 || (bitfield
&& !flag_signed_bitfields
6933 /* A typedef for plain `int' without `signed' can be
6934 controlled just like plain `int', but a typedef for
6935 `signed int' cannot be so controlled. */
6937 && C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl
))
6938 && (TREE_CODE (type
) == INTEGER_TYPE
6939 || TREE_CODE (type
) == CHAR_TYPE
)
6940 && !same_type_p (TYPE_MAIN_VARIANT (type
), wchar_type_node
)))
6943 type
= long_long_unsigned_type_node
;
6945 type
= long_unsigned_type_node
;
6947 type
= short_unsigned_type_node
;
6948 else if (type
== char_type_node
)
6949 type
= unsigned_char_type_node
;
6950 else if (typedef_decl
)
6951 type
= c_common_unsigned_type (type
);
6953 type
= unsigned_type_node
;
6955 else if (signed_p
&& type
== char_type_node
)
6956 type
= signed_char_type_node
;
6958 type
= long_long_integer_type_node
;
6960 type
= long_integer_type_node
;
6962 type
= short_integer_type_node
;
6964 if (declspecs
->specs
[(int)ds_complex
])
6966 if (TREE_CODE (type
) != INTEGER_TYPE
&& TREE_CODE (type
) != REAL_TYPE
)
6967 error ("complex invalid for %qs", name
);
6968 /* If we just have "complex", it is equivalent to
6969 "complex double", but if any modifiers at all are specified it is
6970 the complex form of TYPE. E.g, "complex short" is
6971 "complex short int". */
6973 else if (defaulted_int
&& ! longlong
6974 && ! (long_p
|| short_p
|| signed_p
|| unsigned_p
))
6975 type
= complex_double_type_node
;
6976 else if (type
== integer_type_node
)
6977 type
= complex_integer_type_node
;
6978 else if (type
== float_type_node
)
6979 type
= complex_float_type_node
;
6980 else if (type
== double_type_node
)
6981 type
= complex_double_type_node
;
6982 else if (type
== long_double_type_node
)
6983 type
= complex_long_double_type_node
;
6985 type
= build_complex_type (type
);
6988 type_quals
= TYPE_UNQUALIFIED
;
6989 if (declspecs
->specs
[(int)ds_const
])
6990 type_quals
|= TYPE_QUAL_CONST
;
6991 if (declspecs
->specs
[(int)ds_volatile
])
6992 type_quals
|= TYPE_QUAL_VOLATILE
;
6993 if (declspecs
->specs
[(int)ds_restrict
])
6994 type_quals
|= TYPE_QUAL_RESTRICT
;
6995 if (sfk
== sfk_conversion
&& type_quals
!= TYPE_UNQUALIFIED
)
6996 error ("qualifiers are not allowed on declaration of %<operator %T%>",
6999 type_quals
|= cp_type_quals (type
);
7000 type
= cp_build_qualified_type_real
7001 (type
, type_quals
, ((typedef_decl
&& !DECL_ARTIFICIAL (typedef_decl
)
7002 ? tf_ignore_bad_quals
: 0) | tf_error
| tf_warning
));
7003 /* We might have ignored or rejected some of the qualifiers. */
7004 type_quals
= cp_type_quals (type
);
7007 inlinep
= !! declspecs
->specs
[(int)ds_inline
];
7008 virtualp
= !! declspecs
->specs
[(int)ds_virtual
];
7009 explicitp
= !! declspecs
->specs
[(int)ds_explicit
];
7011 storage_class
= declspecs
->storage_class
;
7012 if (storage_class
== sc_static
)
7013 staticp
= 1 + (decl_context
== FIELD
);
7015 if (virtualp
&& staticp
== 2)
7017 error ("member %qD cannot be declared both virtual and static", dname
);
7020 friendp
= !! declspecs
->specs
[(int)ds_friend
];
7022 if (dependant_name
&& !friendp
)
7024 error ("%<%T::%D%> is not a valid declarator", ctype
, dependant_name
);
7025 return void_type_node
;
7028 /* Issue errors about use of storage classes for parameters. */
7029 if (decl_context
== PARM
)
7031 if (declspecs
->specs
[(int)ds_typedef
])
7032 error ("typedef declaration invalid in parameter declaration");
7033 else if (storage_class
== sc_static
7034 || storage_class
== sc_extern
7036 error ("storage class specifiers invalid in parameter declarations");
7039 /* Give error if `virtual' is used outside of class declaration. */
7041 && (current_class_name
== NULL_TREE
|| decl_context
!= FIELD
))
7043 error ("virtual outside class declaration");
7047 /* Static anonymous unions are dealt with here. */
7048 if (staticp
&& decl_context
== TYPENAME
7050 && ANON_AGGR_TYPE_P (declspecs
->type
))
7051 decl_context
= FIELD
;
7053 /* Warn about storage classes that are invalid for certain
7054 kinds of declarations (parameters, typenames, etc.). */
7055 if (declspecs
->multiple_storage_classes_p
)
7056 error ("multiple storage classes in declaration of %qs", name
);
7059 && storage_class
!= sc_extern
7060 && storage_class
!= sc_static
)
7061 || declspecs
->specs
[(int)ds_typedef
]))
7063 error ("multiple storage classes in declaration of %qs", name
);
7066 else if (decl_context
!= NORMAL
7067 && ((storage_class
!= sc_none
7068 && storage_class
!= sc_mutable
)
7071 if ((decl_context
== PARM
|| decl_context
== CATCHPARM
)
7072 && (storage_class
== sc_register
7073 || storage_class
== sc_auto
))
7075 else if (declspecs
->specs
[(int)ds_typedef
])
7077 else if (decl_context
== FIELD
7078 /* C++ allows static class elements. */
7079 && storage_class
== sc_static
)
7080 /* C++ also allows inlines and signed and unsigned elements,
7081 but in those cases we don't come in here. */
7085 if (decl_context
== FIELD
)
7087 tree tmp
= NULL_TREE
;
7092 /* Avoid trying to get an operand off an identifier node. */
7093 if (declarator
->kind
!= cdk_id
)
7094 tmp
= declarator
->declarator
->u
.id
.name
;
7096 tmp
= declarator
->u
.id
.name
;
7097 op
= IDENTIFIER_OPNAME_P (tmp
);
7098 if (IDENTIFIER_TYPENAME_P (tmp
))
7100 if (is_typename_at_global_scope (tmp
))
7101 name
= IDENTIFIER_POINTER (tmp
);
7103 name
= "<invalid operator>";
7106 error ("storage class specified for %s %qs",
7107 op
? "member operator" : "field",
7112 if (decl_context
== PARM
|| decl_context
== CATCHPARM
)
7113 error ("storage class specified for parameter %qs", name
);
7115 error ("storage class specified for typename");
7117 if (storage_class
== sc_register
7118 || storage_class
== sc_auto
7119 || storage_class
== sc_extern
7121 storage_class
= sc_none
;
7124 else if (storage_class
== sc_extern
&& initialized
7127 if (toplevel_bindings_p ())
7129 /* It's common practice (and completely valid) to have a const
7130 be initialized and declared extern. */
7131 if (!(type_quals
& TYPE_QUAL_CONST
))
7132 warning ("%qs initialized and declared %<extern%>", name
);
7135 error ("%qs has both %<extern%> and initializer", name
);
7137 else if (storage_class
== sc_extern
&& funcdef_flag
7138 && ! toplevel_bindings_p ())
7139 error ("nested function %qs declared %<extern%>", name
);
7140 else if (toplevel_bindings_p ())
7142 if (storage_class
== sc_auto
)
7143 error ("top-level declaration of %qs specifies %<auto%>", name
);
7146 && storage_class
!= sc_extern
7147 && storage_class
!= sc_static
)
7149 error ("function-scope %qs implicitly auto and declared %<__thread%>",
7154 if (storage_class
&& friendp
)
7155 error ("storage class specifiers invalid in friend function declarations");
7158 unqualified_id
= NULL_TREE
;
7161 unqualified_id
= id_declarator
->u
.id
.name
;
7162 if (TREE_CODE (unqualified_id
) == SCOPE_REF
)
7163 unqualified_id
= TREE_OPERAND (unqualified_id
, 1);
7164 if (TREE_CODE (unqualified_id
) == BASELINK
)
7165 unqualified_id
= BASELINK_FUNCTIONS (unqualified_id
);
7166 switch (TREE_CODE (unqualified_id
))
7170 = constructor_name (TREE_OPERAND (unqualified_id
, 0));
7175 = constructor_name (TREE_TYPE (unqualified_id
));
7178 case IDENTIFIER_NODE
:
7179 case TEMPLATE_ID_EXPR
:
7187 /* Determine the type of the entity declared by recurring on the
7190 declarator
&& declarator
->kind
!= cdk_id
;
7191 declarator
= declarator
->declarator
)
7193 const cp_declarator
*inner_declarator
;
7196 if (type
== error_mark_node
)
7197 return error_mark_node
;
7199 inner_declarator
= declarator
->declarator
;
7201 attrs
= declarator
->attributes
;
7207 if (declarator
== NULL
|| declarator
->kind
== cdk_id
)
7208 attr_flags
|= (int) ATTR_FLAG_DECL_NEXT
;
7209 if (declarator
->kind
== cdk_function
)
7210 attr_flags
|= (int) ATTR_FLAG_FUNCTION_NEXT
;
7211 if (declarator
->kind
== cdk_array
)
7212 attr_flags
|= (int) ATTR_FLAG_ARRAY_NEXT
;
7213 returned_attrs
= decl_attributes (&type
,
7214 chainon (returned_attrs
, attrs
),
7218 switch (declarator
->kind
)
7221 type
= create_array_type_for_decl (dname
, type
,
7222 declarator
->u
.array
.bounds
);
7230 /* Declaring a function type.
7231 Make sure we have a valid type for the function to return. */
7233 /* We now know that the TYPE_QUALS don't apply to the
7234 decl, but to its return type. */
7235 type_quals
= TYPE_UNQUALIFIED
;
7237 /* Warn about some types functions can't return. */
7239 if (TREE_CODE (type
) == FUNCTION_TYPE
)
7241 error ("%qs declared as function returning a function", name
);
7242 type
= integer_type_node
;
7244 if (TREE_CODE (type
) == ARRAY_TYPE
)
7246 error ("%qs declared as function returning an array", name
);
7247 type
= integer_type_node
;
7250 /* Pick up type qualifiers which should be applied to `this'. */
7251 quals
= declarator
->u
.function
.qualifiers
;
7253 /* Pick up the exception specifications. */
7254 raises
= declarator
->u
.function
.exception_specification
;
7256 /* Say it's a definition only for the CALL_EXPR
7257 closest to the identifier. */
7258 funcdecl_p
= inner_declarator
&& inner_declarator
->kind
== cdk_id
;
7260 if (ctype
== NULL_TREE
7261 && decl_context
== FIELD
7263 && (friendp
== 0 || dname
== current_class_name
))
7264 ctype
= current_class_type
;
7266 if (ctype
&& sfk
== sfk_conversion
)
7267 TYPE_HAS_CONVERSION (ctype
) = 1;
7268 if (ctype
&& (sfk
== sfk_constructor
7269 || sfk
== sfk_destructor
))
7271 /* We are within a class's scope. If our declarator name
7272 is the same as the class name, and we are defining
7273 a function, then it is a constructor/destructor, and
7274 therefore returns a void type. */
7276 if (flags
== DTOR_FLAG
)
7278 /* ISO C++ 12.4/2. A destructor may not be
7279 declared const or volatile. A destructor may
7282 error ("destructor cannot be static member function");
7285 error ("destructors may not be cv-qualified");
7286 quals
= TYPE_UNQUALIFIED
;
7288 if (decl_context
== FIELD
)
7290 if (! member_function_or_else (ctype
,
7293 return void_type_node
;
7296 else /* It's a constructor. */
7300 /* ISO C++ 12.1. A constructor may not be
7301 declared const or volatile. A constructor may
7302 not be virtual. A constructor may not be
7305 error ("constructor cannot be static member function");
7308 pedwarn ("constructors cannot be declared virtual");
7313 error ("constructors may not be cv-qualified");
7314 quals
= TYPE_UNQUALIFIED
;
7316 if (decl_context
== FIELD
)
7318 if (! member_function_or_else (ctype
,
7321 return void_type_node
;
7322 TYPE_HAS_CONSTRUCTOR (ctype
) = 1;
7323 if (sfk
!= sfk_constructor
)
7327 if (decl_context
== FIELD
)
7333 error ("can't initialize friend function %qs", name
);
7336 /* Cannot be both friend and virtual. */
7337 error ("virtual functions cannot be friends");
7340 if (decl_context
== NORMAL
)
7341 error ("friend declaration not in class definition");
7342 if (current_function_decl
&& funcdef_flag
)
7343 error ("can't define friend function %qs in a local "
7348 arg_types
= grokparms (declarator
->u
.function
.parameters
,
7351 if (inner_declarator
7352 && inner_declarator
->kind
== cdk_id
7353 && inner_declarator
->u
.id
.sfk
== sfk_destructor
7354 && arg_types
!= void_list_node
)
7356 error ("destructors may not have parameters");
7357 arg_types
= void_list_node
;
7361 type
= build_function_type (type
, arg_types
);
7368 /* Filter out pointers-to-references and references-to-references.
7369 We can get these if a TYPE_DECL is used. */
7371 if (TREE_CODE (type
) == REFERENCE_TYPE
)
7373 error (declarator
->kind
== cdk_reference
7374 ? "cannot declare reference to %q#T"
7375 : "cannot declare pointer to %q#T", type
);
7376 type
= TREE_TYPE (type
);
7378 else if (VOID_TYPE_P (type
))
7380 if (declarator
->kind
== cdk_reference
)
7381 error ("cannot declare reference to %q#T", type
);
7382 else if (declarator
->kind
== cdk_ptrmem
)
7383 error ("cannot declare pointer to %q#T member", type
);
7386 /* We now know that the TYPE_QUALS don't apply to the decl,
7387 but to the target of the pointer. */
7388 type_quals
= TYPE_UNQUALIFIED
;
7390 if (declarator
->kind
== cdk_ptrmem
7391 && (TREE_CODE (type
) == FUNCTION_TYPE
7392 || (quals
&& TREE_CODE (type
) == METHOD_TYPE
)))
7394 tree dummy
= build_decl (TYPE_DECL
, NULL_TREE
, type
);
7395 grok_method_quals (declarator
->u
.pointer
.class_type
,
7397 type
= TREE_TYPE (dummy
);
7398 quals
= TYPE_UNQUALIFIED
;
7401 if (declarator
->kind
== cdk_reference
)
7403 if (!VOID_TYPE_P (type
))
7404 type
= build_reference_type (type
);
7406 else if (TREE_CODE (type
) == METHOD_TYPE
)
7407 type
= build_ptrmemfunc_type (build_pointer_type (type
));
7408 else if (declarator
->kind
== cdk_ptrmem
)
7409 type
= build_ptrmem_type (declarator
->u
.pointer
.class_type
,
7412 type
= build_pointer_type (type
);
7414 /* Process a list of type modifier keywords (such as
7415 const or volatile) that were given inside the `*' or `&'. */
7417 if (declarator
->u
.pointer
.qualifiers
)
7420 = cp_build_qualified_type (type
,
7421 declarator
->u
.pointer
.qualifiers
);
7422 type_quals
= cp_type_quals (type
);
7435 if (unqualified_id
&& TREE_CODE (unqualified_id
) == TEMPLATE_ID_EXPR
7436 && TREE_CODE (type
) != FUNCTION_TYPE
7437 && TREE_CODE (type
) != METHOD_TYPE
)
7439 error ("template-id %qD used as a declarator",
7441 unqualified_id
= dname
;
7444 /* If DECLARATOR is non-NULL, we know it is a cdk_id declarator;
7445 otherwise, we would not have exited the loop above. */
7447 && TREE_CODE (declarator
->u
.id
.name
) == SCOPE_REF
7448 /* If the qualifying scope was invalid, it will have been set to
7450 && TREE_OPERAND (declarator
->u
.id
.name
, 0)
7451 && TYPE_P (TREE_OPERAND (declarator
->u
.id
.name
, 0)))
7455 ctype
= TREE_OPERAND (declarator
->u
.id
.name
, 0);
7457 ctype
= TYPE_MAIN_VARIANT (ctype
);
7459 while (t
!= NULL_TREE
&& CLASS_TYPE_P (t
))
7461 /* You're supposed to have one `template <...>' for every
7462 template class, but you don't need one for a full
7463 specialization. For example:
7465 template <class T> struct S{};
7466 template <> struct S<int> { void f(); };
7467 void S<int>::f () {}
7469 is correct; there shouldn't be a `template <>' for the
7470 definition of `S<int>::f'. */
7471 if (CLASSTYPE_TEMPLATE_INFO (t
)
7472 && (CLASSTYPE_TEMPLATE_INSTANTIATION (t
)
7473 || uses_template_parms (CLASSTYPE_TI_ARGS (t
)))
7474 && PRIMARY_TEMPLATE_P (CLASSTYPE_TI_TEMPLATE (t
)))
7475 template_count
+= 1;
7477 t
= TYPE_MAIN_DECL (t
);
7478 t
= DECL_CONTEXT (t
);
7481 if (ctype
== current_class_type
)
7487 Is this ill-formed? */
7490 pedwarn ("extra qualification %<%T::%> on member %qs ignored",
7493 else if (TREE_CODE (type
) == FUNCTION_TYPE
)
7495 tree sname
= TREE_OPERAND (declarator
->u
.id
.name
, 1);
7497 if (TREE_CODE (sname
) == IDENTIFIER_NODE
7498 && NEW_DELETE_OPNAME_P (sname
))
7499 /* Overloaded operator new and operator delete
7500 are always static functions. */
7502 else if (current_class_type
== NULL_TREE
|| friendp
)
7504 = build_method_type_directly (ctype
,
7506 TYPE_ARG_TYPES (type
));
7509 error ("cannot declare member function %<%T::%s%> within %<%T%>",
7510 ctype
, name
, current_class_type
);
7511 return error_mark_node
;
7514 else if (declspecs
->specs
[(int)ds_typedef
]
7515 || COMPLETE_TYPE_P (complete_type (ctype
)))
7517 /* Have to move this code elsewhere in this function.
7518 this code is used for i.e., typedef int A::M; M *pm;
7520 It is? How? jason 10/2/94 */
7522 if (current_class_type
)
7524 error ("cannot declare member %<%T::%s%> within %qT",
7525 ctype
, name
, current_class_type
);
7526 return void_type_node
;
7531 cxx_incomplete_type_error (NULL_TREE
, ctype
);
7532 return error_mark_node
;
7539 *attrlist
= chainon (returned_attrs
, *attrlist
);
7541 attrlist
= &returned_attrs
;
7544 /* Now TYPE has the actual type. */
7546 /* Did array size calculations overflow? */
7548 if (TREE_CODE (type
) == ARRAY_TYPE
7549 && COMPLETE_TYPE_P (type
)
7550 && TREE_OVERFLOW (TYPE_SIZE (type
)))
7552 error ("size of array %qs is too large", name
);
7553 /* If we proceed with the array type as it is, we'll eventually
7554 crash in tree_low_cst(). */
7555 type
= error_mark_node
;
7558 if ((decl_context
== FIELD
|| decl_context
== PARM
)
7559 && !processing_template_decl
7560 && variably_modified_type_p (type
, NULL_TREE
))
7562 if (decl_context
== FIELD
)
7563 error ("data member may not have variably modified type %qT", type
);
7565 error ("parameter may not have variably modified type %qT", type
);
7566 type
= error_mark_node
;
7569 if (explicitp
== 1 || (explicitp
&& friendp
))
7571 /* [dcl.fct.spec] The explicit specifier shall only be used in
7572 declarations of constructors within a class definition. */
7573 error ("only declarations of constructors can be %<explicit%>");
7577 if (storage_class
== sc_mutable
)
7579 if (decl_context
!= FIELD
|| friendp
)
7581 error ("non-member %qs cannot be declared %<mutable%>", name
);
7582 storage_class
= sc_none
;
7584 else if (decl_context
== TYPENAME
|| declspecs
->specs
[(int)ds_typedef
])
7586 error ("non-object member %qs cannot be declared %<mutable%>", name
);
7587 storage_class
= sc_none
;
7589 else if (TREE_CODE (type
) == FUNCTION_TYPE
7590 || TREE_CODE (type
) == METHOD_TYPE
)
7592 error ("function %qs cannot be declared %<mutable%>", name
);
7593 storage_class
= sc_none
;
7597 error ("static %qs cannot be declared %<mutable%>", name
);
7598 storage_class
= sc_none
;
7600 else if (type_quals
& TYPE_QUAL_CONST
)
7602 error ("const %qs cannot be declared %<mutable%>", name
);
7603 storage_class
= sc_none
;
7607 /* If this is declaring a typedef name, return a TYPE_DECL. */
7608 if (declspecs
->specs
[(int)ds_typedef
] && decl_context
!= TYPENAME
)
7612 /* Note that the grammar rejects storage classes
7613 in typenames, fields or parameters. */
7614 if (current_lang_name
== lang_name_java
)
7615 TYPE_FOR_JAVA (type
) = 1;
7617 if (decl_context
== FIELD
)
7619 if (constructor_name_p (unqualified_id
, current_class_type
))
7620 pedwarn ("ISO C++ forbids nested type %qD with same name "
7621 "as enclosing class",
7623 decl
= build_lang_decl (TYPE_DECL
, unqualified_id
, type
);
7627 decl
= build_decl (TYPE_DECL
, unqualified_id
, type
);
7628 if (in_namespace
|| ctype
)
7629 error ("%Jtypedef name may not be a nested-name-specifier", decl
);
7630 if (!current_function_decl
)
7631 DECL_CONTEXT (decl
) = FROB_CONTEXT (current_namespace
);
7632 else if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (current_function_decl
)
7633 || (DECL_MAYBE_IN_CHARGE_DESTRUCTOR_P
7634 (current_function_decl
)))
7635 /* The TYPE_DECL is "abstract" because there will be
7636 clones of this constructor/destructor, and there will
7637 be copies of this TYPE_DECL generated in those
7639 DECL_ABSTRACT (decl
) = 1;
7642 /* If the user declares "typedef struct {...} foo" then the
7643 struct will have an anonymous name. Fill that name in now.
7644 Nothing can refer to it, so nothing needs know about the name
7646 if (type
!= error_mark_node
7649 && TREE_CODE (TYPE_NAME (type
)) == TYPE_DECL
7650 && TYPE_ANONYMOUS_P (type
)
7651 /* Don't do this if there are attributes. */
7652 && (!attrlist
|| !*attrlist
)
7653 && cp_type_quals (type
) == TYPE_UNQUALIFIED
)
7655 tree oldname
= TYPE_NAME (type
);
7658 /* Replace the anonymous name with the real name everywhere. */
7659 lookup_tag_reverse (type
, unqualified_id
);
7660 for (t
= TYPE_MAIN_VARIANT (type
); t
; t
= TYPE_NEXT_VARIANT (t
))
7661 if (TYPE_NAME (t
) == oldname
)
7662 TYPE_NAME (t
) = decl
;
7664 if (TYPE_LANG_SPECIFIC (type
))
7665 TYPE_WAS_ANONYMOUS (type
) = 1;
7667 /* If this is a typedef within a template class, the nested
7668 type is a (non-primary) template. The name for the
7669 template needs updating as well. */
7670 if (TYPE_LANG_SPECIFIC (type
) && CLASSTYPE_TEMPLATE_INFO (type
))
7671 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type
))
7672 = TYPE_IDENTIFIER (type
);
7674 /* FIXME remangle member functions; member functions of a
7675 type with external linkage have external linkage. */
7680 if (ctype
== NULL_TREE
)
7682 if (TREE_CODE (type
) != METHOD_TYPE
)
7683 error ("%Jinvalid type qualifier for non-member function type",
7686 ctype
= TYPE_METHOD_BASETYPE (type
);
7688 if (ctype
!= NULL_TREE
)
7689 grok_method_quals (ctype
, decl
, quals
);
7693 || (typedef_decl
&& C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl
)))
7694 C_TYPEDEF_EXPLICITLY_SIGNED (decl
) = 1;
7696 bad_specifiers (decl
, "type", virtualp
, quals
!= TYPE_UNQUALIFIED
,
7697 inlinep
, friendp
, raises
!= NULL_TREE
);
7702 /* Detect the case of an array type of unspecified size
7703 which came, as such, direct from a typedef name.
7704 We must copy the type, so that the array's domain can be
7705 individually set by the object's initializer. */
7707 if (type
&& typedef_type
7708 && TREE_CODE (type
) == ARRAY_TYPE
&& !TYPE_DOMAIN (type
)
7709 && TYPE_MAIN_VARIANT (type
) == TYPE_MAIN_VARIANT (typedef_type
))
7710 type
= build_cplus_array_type (TREE_TYPE (type
), NULL_TREE
);
7712 /* Detect where we're using a typedef of function type to declare a
7713 function. PARMS will not be set, so we must create it now. */
7715 if (type
== typedef_type
&& TREE_CODE (type
) == FUNCTION_TYPE
)
7717 tree decls
= NULL_TREE
;
7720 for (args
= TYPE_ARG_TYPES (type
); args
; args
= TREE_CHAIN (args
))
7722 tree decl
= cp_build_parm_decl (NULL_TREE
, TREE_VALUE (args
));
7724 TREE_CHAIN (decl
) = decls
;
7728 parms
= nreverse (decls
);
7731 /* If this is a type name (such as, in a cast or sizeof),
7732 compute the type and return it now. */
7734 if (decl_context
== TYPENAME
)
7736 /* Note that the grammar rejects storage classes
7737 in typenames, fields or parameters. */
7738 if (type_quals
!= TYPE_UNQUALIFIED
)
7739 type_quals
= TYPE_UNQUALIFIED
;
7741 /* Special case: "friend class foo" looks like a TYPENAME context. */
7744 if (type_quals
!= TYPE_UNQUALIFIED
)
7746 error ("type qualifiers specified for friend class declaration");
7747 type_quals
= TYPE_UNQUALIFIED
;
7751 error ("%<inline%> specified for friend class declaration");
7757 /* Don't allow friend declaration without a class-key. */
7758 if (TREE_CODE (type
) == TEMPLATE_TYPE_PARM
)
7759 pedwarn ("template parameters cannot be friends");
7760 else if (TREE_CODE (type
) == TYPENAME_TYPE
)
7761 pedwarn ("friend declaration requires class-key, "
7762 "i.e. %<friend class %T::%D%>",
7763 TYPE_CONTEXT (type
), TYPENAME_TYPE_FULLNAME (type
));
7765 pedwarn ("friend declaration requires class-key, "
7766 "i.e. %<friend %#T%>",
7770 /* Only try to do this stuff if we didn't already give up. */
7771 if (type
!= integer_type_node
)
7773 /* A friendly class? */
7774 if (current_class_type
)
7775 make_friend_class (current_class_type
, TYPE_MAIN_VARIANT (type
),
7778 error ("trying to make class %qT a friend of global scope",
7781 type
= void_type_node
;
7786 if (ctype
== NULL_TREE
)
7788 if (TREE_CODE (type
) != METHOD_TYPE
)
7789 error ("invalid qualifiers on non-member function type");
7791 ctype
= TYPE_METHOD_BASETYPE (type
);
7795 tree dummy
= build_decl (TYPE_DECL
, unqualified_id
, type
);
7796 grok_method_quals (ctype
, dummy
, quals
);
7797 type
= TREE_TYPE (dummy
);
7803 else if (unqualified_id
== NULL_TREE
&& decl_context
!= PARM
7804 && decl_context
!= CATCHPARM
7805 && TREE_CODE (type
) != UNION_TYPE
7808 error ("abstract declarator %qT used as declaration", type
);
7809 return error_mark_node
;
7812 /* Only functions may be declared using an operator-function-id. */
7814 && IDENTIFIER_OPNAME_P (unqualified_id
)
7815 && TREE_CODE (type
) != FUNCTION_TYPE
7816 && TREE_CODE (type
) != METHOD_TYPE
)
7818 error ("declaration of %qD as non-function", unqualified_id
);
7819 return error_mark_node
;
7822 /* We don't check parameter types here because we can emit a better
7823 error message later. */
7824 if (decl_context
!= PARM
)
7825 type
= check_var_type (unqualified_id
, type
);
7827 /* Now create the decl, which may be a VAR_DECL, a PARM_DECL
7828 or a FUNCTION_DECL, depending on DECL_CONTEXT and TYPE. */
7830 if (decl_context
== PARM
|| decl_context
== CATCHPARM
)
7832 if (ctype
|| in_namespace
)
7833 error ("cannot use %<::%> in parameter declaration");
7835 /* A parameter declared as an array of T is really a pointer to T.
7836 One declared as a function is really a pointer to a function.
7837 One declared as a member is really a pointer to member. */
7839 if (TREE_CODE (type
) == ARRAY_TYPE
)
7841 /* Transfer const-ness of array into that of type pointed to. */
7842 type
= build_pointer_type (TREE_TYPE (type
));
7843 type_quals
= TYPE_UNQUALIFIED
;
7845 else if (TREE_CODE (type
) == FUNCTION_TYPE
)
7846 type
= build_pointer_type (type
);
7852 if (decl_context
== PARM
)
7854 decl
= cp_build_parm_decl (unqualified_id
, type
);
7856 bad_specifiers (decl
, "parameter", virtualp
, quals
!= TYPE_UNQUALIFIED
,
7857 inlinep
, friendp
, raises
!= NULL_TREE
);
7859 else if (decl_context
== FIELD
)
7861 /* The C99 flexible array extension. */
7862 if (!staticp
&& TREE_CODE (type
) == ARRAY_TYPE
7863 && TYPE_DOMAIN (type
) == NULL_TREE
)
7865 tree itype
= compute_array_index_type (dname
, integer_zero_node
);
7866 type
= build_cplus_array_type (TREE_TYPE (type
), itype
);
7869 if (type
== error_mark_node
)
7871 /* Happens when declaring arrays of sizes which
7872 are error_mark_node, for example. */
7875 else if (in_namespace
&& !friendp
)
7877 /* Something like struct S { int N::j; }; */
7878 error ("invalid use of %<::%>");
7881 else if (TREE_CODE (type
) == FUNCTION_TYPE
)
7884 tree function_context
;
7886 /* We catch the others as conflicts with the builtin
7888 if (friendp
&& unqualified_id
== ridpointers
[(int) RID_SIGNED
])
7890 error ("function %qD cannot be declared friend",
7897 if (ctype
== NULL_TREE
)
7898 ctype
= current_class_type
;
7900 if (ctype
== NULL_TREE
)
7902 error ("can't make %qD into a method -- not in a class",
7904 return void_type_node
;
7907 /* ``A union may [ ... ] not [ have ] virtual functions.''
7909 if (virtualp
&& TREE_CODE (ctype
) == UNION_TYPE
)
7911 error ("function %qD declared virtual inside a union",
7913 return void_type_node
;
7916 if (NEW_DELETE_OPNAME_P (unqualified_id
))
7920 error ("%qD cannot be declared virtual, since it "
7926 else if (staticp
< 2)
7927 type
= build_method_type_directly (ctype
,
7929 TYPE_ARG_TYPES (type
));
7932 /* Tell grokfndecl if it needs to set TREE_PUBLIC on the node. */
7933 function_context
= (ctype
!= NULL_TREE
) ?
7934 decl_function_context (TYPE_MAIN_DECL (ctype
)) : NULL_TREE
;
7935 publicp
= (! friendp
|| ! staticp
)
7936 && function_context
== NULL_TREE
;
7937 decl
= grokfndecl (ctype
, type
,
7938 TREE_CODE (unqualified_id
) != TEMPLATE_ID_EXPR
7939 ? unqualified_id
: dname
,
7942 virtualp
, flags
, quals
, raises
,
7943 friendp
? -1 : 0, friendp
, publicp
, inlinep
,
7944 funcdef_flag
, template_count
, in_namespace
, attrlist
);
7945 if (decl
== NULL_TREE
)
7948 /* This clobbers the attrs stored in `decl' from `attrlist'. */
7949 /* The decl and setting of decl_attr is also turned off. */
7950 decl
= build_decl_attribute_variant (decl
, decl_attr
);
7953 /* [class.conv.ctor]
7955 A constructor declared without the function-specifier
7956 explicit that can be called with a single parameter
7957 specifies a conversion from the type of its first
7958 parameter to the type of its class. Such a constructor
7959 is called a converting constructor. */
7961 DECL_NONCONVERTING_P (decl
) = 1;
7962 else if (DECL_CONSTRUCTOR_P (decl
))
7964 /* The constructor can be called with exactly one
7965 parameter if there is at least one parameter, and
7966 any subsequent parameters have default arguments.
7967 Ignore any compiler-added parms. */
7968 tree arg_types
= FUNCTION_FIRST_USER_PARMTYPE (decl
);
7970 if (arg_types
== void_list_node
7972 && TREE_CHAIN (arg_types
)
7973 && TREE_CHAIN (arg_types
) != void_list_node
7974 && !TREE_PURPOSE (TREE_CHAIN (arg_types
))))
7975 DECL_NONCONVERTING_P (decl
) = 1;
7978 else if (TREE_CODE (type
) == METHOD_TYPE
)
7980 /* We only get here for friend declarations of
7981 members of other classes. */
7982 /* All method decls are public, so tell grokfndecl to set
7983 TREE_PUBLIC, also. */
7984 decl
= grokfndecl (ctype
, type
,
7985 TREE_CODE (unqualified_id
) != TEMPLATE_ID_EXPR
7986 ? unqualified_id
: dname
,
7989 virtualp
, flags
, quals
, raises
,
7990 friendp
? -1 : 0, friendp
, 1, 0, funcdef_flag
,
7991 template_count
, in_namespace
, attrlist
);
7992 if (decl
== NULL_TREE
)
7995 else if (!staticp
&& !dependent_type_p (type
)
7996 && !COMPLETE_TYPE_P (complete_type (type
))
7997 && (TREE_CODE (type
) != ARRAY_TYPE
|| initialized
== 0))
8000 error ("field %qD has incomplete type", unqualified_id
);
8002 error ("name %qT has incomplete type", type
);
8004 /* If we're instantiating a template, tell them which
8005 instantiation made the field's type be incomplete. */
8006 if (current_class_type
8007 && TYPE_NAME (current_class_type
)
8008 && IDENTIFIER_TEMPLATE (TYPE_IDENTIFIER (current_class_type
))
8010 && declspecs
->type
== type
)
8011 error (" in instantiation of template %qT",
8012 current_class_type
);
8014 type
= error_mark_node
;
8021 error ("%qE is neither function nor member function; "
8022 "cannot be declared friend", unqualified_id
);
8030 /* Friends are treated specially. */
8031 if (ctype
== current_class_type
)
8032 warning ("member functions are implicitly friends of their class");
8033 else if (decl
&& DECL_NAME (decl
))
8035 if (template_class_depth (current_class_type
) == 0)
8037 decl
= check_explicit_specialization
8038 (unqualified_id
, decl
, template_count
,
8039 2 * (funcdef_flag
!= 0) + 4);
8040 if (decl
== error_mark_node
)
8041 return error_mark_node
;
8044 decl
= do_friend (ctype
, unqualified_id
, decl
,
8045 *attrlist
, flags
, quals
, funcdef_flag
);
8049 return void_type_node
;
8052 /* Structure field. It may not be a function, except for C++. */
8054 if (decl
== NULL_TREE
)
8060 /* An attempt is being made to initialize a non-static
8061 member. But, from [class.mem]:
8063 4 A member-declarator can contain a
8064 constant-initializer only if it declares a static
8065 member (_class.static_) of integral or enumeration
8066 type, see _class.static.data_.
8068 This used to be relatively common practice, but
8069 the rest of the compiler does not correctly
8070 handle the initialization unless the member is
8071 static so we make it static below. */
8072 pedwarn ("ISO C++ forbids initialization of member %qD",
8074 pedwarn ("making %qD static", unqualified_id
);
8078 if (uses_template_parms (type
))
8079 /* We'll check at instantiation time. */
8081 else if (check_static_variable_definition (unqualified_id
,
8083 /* If we just return the declaration, crashes
8084 will sometimes occur. We therefore return
8085 void_type_node, as if this was a friend
8086 declaration, to cause callers to completely
8087 ignore this declaration. */
8088 return void_type_node
;
8093 /* C++ allows static class members. All other work
8094 for this is done by grokfield. */
8095 decl
= build_lang_decl (VAR_DECL
, unqualified_id
, type
);
8096 set_linkage_for_static_data_member (decl
);
8097 /* Even if there is an in-class initialization, DECL
8098 is considered undefined until an out-of-class
8099 definition is provided. */
8100 DECL_EXTERNAL (decl
) = 1;
8104 decl
= build_decl (FIELD_DECL
, unqualified_id
, type
);
8105 DECL_NONADDRESSABLE_P (decl
) = bitfield
;
8106 if (storage_class
== sc_mutable
)
8108 DECL_MUTABLE_P (decl
) = 1;
8109 storage_class
= sc_none
;
8113 bad_specifiers (decl
, "field", virtualp
, quals
!= TYPE_UNQUALIFIED
,
8114 inlinep
, friendp
, raises
!= NULL_TREE
);
8117 else if (TREE_CODE (type
) == FUNCTION_TYPE
8118 || TREE_CODE (type
) == METHOD_TYPE
)
8123 if (!unqualified_id
)
8126 if (TREE_CODE (unqualified_id
) == TEMPLATE_ID_EXPR
)
8127 original_name
= dname
;
8129 original_name
= unqualified_id
;
8131 if (storage_class
== sc_auto
)
8132 error ("storage class %<auto%> invalid for function %qs", name
);
8133 else if (storage_class
== sc_register
)
8134 error ("storage class %<register%> invalid for function %qs", name
);
8136 error ("storage class %<__thread%> invalid for function %qs", name
);
8138 /* Function declaration not at top level.
8139 Storage classes other than `extern' are not allowed
8140 and `extern' makes no difference. */
8141 if (! toplevel_bindings_p ()
8142 && (storage_class
== sc_static
8143 || declspecs
->specs
[(int)ds_inline
])
8146 if (storage_class
== sc_static
)
8147 pedwarn ("%<static%> specified invalid for function %qs "
8148 "declared out of global scope", name
);
8150 pedwarn ("%<inline%> specifier invalid for function %qs "
8151 "declared out of global scope", name
);
8154 if (ctype
== NULL_TREE
)
8158 error ("virtual non-class function %qs", name
);
8162 else if (TREE_CODE (type
) == FUNCTION_TYPE
&& staticp
< 2
8163 && !NEW_DELETE_OPNAME_P (original_name
))
8164 type
= build_method_type_directly (ctype
,
8166 TYPE_ARG_TYPES (type
));
8168 /* Record presence of `static'. */
8169 publicp
= (ctype
!= NULL_TREE
8170 || storage_class
== sc_extern
8171 || storage_class
!= sc_static
);
8173 decl
= grokfndecl (ctype
, type
, original_name
, parms
, unqualified_id
,
8174 virtualp
, flags
, quals
, raises
,
8176 publicp
, inlinep
, funcdef_flag
,
8177 template_count
, in_namespace
, attrlist
);
8178 if (decl
== NULL_TREE
)
8183 int invalid_static
= 0;
8185 /* Don't allow a static member function in a class, and forbid
8186 declaring main to be static. */
8187 if (TREE_CODE (type
) == METHOD_TYPE
)
8189 pedwarn ("cannot declare member function %qD to have "
8190 "static linkage", decl
);
8193 else if (current_function_decl
)
8195 /* FIXME need arm citation */
8196 error ("cannot declare static function inside another function");
8203 storage_class
= sc_none
;
8209 /* It's a variable. */
8211 /* An uninitialized decl with `extern' is a reference. */
8212 decl
= grokvardecl (type
, unqualified_id
,
8215 (type_quals
& TYPE_QUAL_CONST
) != 0,
8216 ctype
? ctype
: in_namespace
);
8217 bad_specifiers (decl
, "variable", virtualp
, quals
!= TYPE_UNQUALIFIED
,
8218 inlinep
, friendp
, raises
!= NULL_TREE
);
8222 DECL_CONTEXT (decl
) = ctype
;
8225 pedwarn ("%<static%> may not be used when defining "
8226 "(as opposed to declaring) a static data member");
8228 storage_class
= sc_none
;
8230 if (storage_class
== sc_register
&& TREE_STATIC (decl
))
8232 error ("static member %qD declared %<register%>", decl
);
8233 storage_class
= sc_none
;
8235 if (storage_class
== sc_extern
&& pedantic
)
8237 pedwarn ("cannot explicitly declare member %q#D to have "
8240 storage_class
= sc_none
;
8245 /* Record `register' declaration for warnings on &
8246 and in case doing stupid register allocation. */
8248 if (storage_class
== sc_register
)
8249 DECL_REGISTER (decl
) = 1;
8250 else if (storage_class
== sc_extern
)
8251 DECL_THIS_EXTERN (decl
) = 1;
8252 else if (storage_class
== sc_static
)
8253 DECL_THIS_STATIC (decl
) = 1;
8255 /* Record constancy and volatility. There's no need to do this
8256 when processing a template; we'll do this for the instantiated
8257 declaration based on the type of DECL. */
8258 if (!processing_template_decl
)
8259 c_apply_type_quals_to_decl (type_quals
, decl
);
8265 /* Subroutine of start_function. Ensure that each of the parameter
8266 types (as listed in PARMS) is complete, as is required for a
8267 function definition. */
8270 require_complete_types_for_parms (tree parms
)
8272 for (; parms
; parms
= TREE_CHAIN (parms
))
8274 if (dependent_type_p (TREE_TYPE (parms
)))
8276 if (VOID_TYPE_P (TREE_TYPE (parms
)))
8277 /* grokparms will have already issued an error. */
8278 TREE_TYPE (parms
) = error_mark_node
;
8279 else if (complete_type_or_else (TREE_TYPE (parms
), parms
))
8281 layout_decl (parms
, 0);
8282 DECL_ARG_TYPE (parms
) = type_passed_as (TREE_TYPE (parms
));
8287 /* Returns nonzero if T is a local variable. */
8290 local_variable_p (tree t
)
8292 if ((TREE_CODE (t
) == VAR_DECL
8293 /* A VAR_DECL with a context that is a _TYPE is a static data
8295 && !TYPE_P (CP_DECL_CONTEXT (t
))
8296 /* Any other non-local variable must be at namespace scope. */
8297 && !DECL_NAMESPACE_SCOPE_P (t
))
8298 || (TREE_CODE (t
) == PARM_DECL
))
8304 /* Returns nonzero if T is an automatic local variable or a label.
8305 (These are the declarations that need to be remapped when the code
8306 containing them is duplicated.) */
8309 nonstatic_local_decl_p (tree t
)
8311 return ((local_variable_p (t
) && !TREE_STATIC (t
))
8312 || TREE_CODE (t
) == LABEL_DECL
8313 || TREE_CODE (t
) == RESULT_DECL
);
8316 /* Like local_variable_p, but suitable for use as a tree-walking
8320 local_variable_p_walkfn (tree
*tp
, int *walk_subtrees
,
8321 void *data ATTRIBUTE_UNUSED
)
8323 if (local_variable_p (*tp
) && !DECL_ARTIFICIAL (*tp
))
8325 else if (TYPE_P (*tp
))
8332 /* Check that ARG, which is a default-argument expression for a
8333 parameter DECL, is valid. Returns ARG, or ERROR_MARK_NODE, if
8334 something goes wrong. DECL may also be a _TYPE node, rather than a
8335 DECL, if there is no DECL available. */
8338 check_default_argument (tree decl
, tree arg
)
8343 if (TREE_CODE (arg
) == DEFAULT_ARG
)
8344 /* We get a DEFAULT_ARG when looking at an in-class declaration
8345 with a default argument. Ignore the argument for now; we'll
8346 deal with it after the class is complete. */
8349 if (processing_template_decl
|| uses_template_parms (arg
))
8350 /* We don't do anything checking until instantiation-time. Note
8351 that there may be uninstantiated arguments even for an
8352 instantiated function, since default arguments are not
8353 instantiated until they are needed. */
8362 decl_type
= TREE_TYPE (decl
);
8364 if (arg
== error_mark_node
8365 || decl
== error_mark_node
8366 || TREE_TYPE (arg
) == error_mark_node
8367 || decl_type
== error_mark_node
)
8368 /* Something already went wrong. There's no need to check
8370 return error_mark_node
;
8372 /* [dcl.fct.default]
8374 A default argument expression is implicitly converted to the
8376 if (!TREE_TYPE (arg
)
8377 || !can_convert_arg (decl_type
, TREE_TYPE (arg
), arg
))
8380 error ("default argument for %q#D has type %qT",
8381 decl
, TREE_TYPE (arg
));
8383 error ("default argument for parameter of type %qT has type %qT",
8384 decl_type
, TREE_TYPE (arg
));
8386 return error_mark_node
;
8389 /* [dcl.fct.default]
8391 Local variables shall not be used in default argument
8394 The keyword `this' shall not be used in a default argument of a
8396 var
= walk_tree_without_duplicates (&arg
, local_variable_p_walkfn
,
8400 error ("default argument %qE uses local variable %qD", arg
, var
);
8401 return error_mark_node
;
8408 /* Decode the list of parameter types for a function type.
8409 Given the list of things declared inside the parens,
8410 return a list of types.
8412 If this parameter does not end with an ellipsis, we append
8415 *PARMS is set to the chain of PARM_DECLs created. */
8418 grokparms (cp_parameter_declarator
*first_parm
, tree
*parms
)
8420 tree result
= NULL_TREE
;
8421 tree decls
= NULL_TREE
;
8422 int ellipsis
= !first_parm
|| first_parm
->ellipsis_p
;
8423 cp_parameter_declarator
*parm
;
8426 for (parm
= first_parm
; parm
!= NULL
; parm
= parm
->next
)
8428 tree type
= NULL_TREE
;
8429 tree init
= parm
->default_argument
;
8433 if (parm
== no_parameters
)
8436 attrs
= parm
->decl_specifiers
.attributes
;
8437 parm
->decl_specifiers
.attributes
= NULL_TREE
;
8438 decl
= grokdeclarator (parm
->declarator
, &parm
->decl_specifiers
,
8439 PARM
, init
!= NULL_TREE
, &attrs
);
8440 if (! decl
|| TREE_TYPE (decl
) == error_mark_node
)
8444 cplus_decl_attributes (&decl
, attrs
, 0);
8446 type
= TREE_TYPE (decl
);
8447 if (VOID_TYPE_P (type
))
8449 if (same_type_p (type
, void_type_node
)
8450 && !DECL_NAME (decl
) && !result
&& !parm
->next
&& !ellipsis
)
8451 /* this is a parmlist of `(void)', which is ok. */
8453 cxx_incomplete_type_error (decl
, type
);
8454 /* It's not a good idea to actually create parameters of
8455 type `void'; other parts of the compiler assume that a
8456 void type terminates the parameter list. */
8457 type
= error_mark_node
;
8458 TREE_TYPE (decl
) = error_mark_node
;
8461 if (type
!= error_mark_node
)
8463 /* Top-level qualifiers on the parameters are
8464 ignored for function types. */
8465 type
= cp_build_qualified_type (type
, 0);
8466 if (TREE_CODE (type
) == METHOD_TYPE
)
8468 error ("parameter %qD invalidly declared method type", decl
);
8469 type
= build_pointer_type (type
);
8470 TREE_TYPE (decl
) = type
;
8472 else if (abstract_virtuals_error (decl
, type
))
8473 any_error
= 1; /* Seems like a good idea. */
8474 else if (POINTER_TYPE_P (type
))
8476 /* [dcl.fct]/6, parameter types cannot contain pointers
8477 (references) to arrays of unknown bound. */
8478 tree t
= TREE_TYPE (type
);
8479 int ptr
= TYPE_PTR_P (type
);
8485 else if (TREE_CODE (t
) != ARRAY_TYPE
)
8487 else if (!TYPE_DOMAIN (t
))
8491 if (TREE_CODE (t
) == ARRAY_TYPE
)
8492 error ("parameter %qD includes %s to array of unknown "
8494 decl
, ptr
? "pointer" : "reference", t
);
8497 if (!any_error
&& init
)
8498 init
= check_default_argument (decl
, init
);
8503 TREE_CHAIN (decl
) = decls
;
8505 result
= tree_cons (init
, type
, result
);
8507 decls
= nreverse (decls
);
8508 result
= nreverse (result
);
8510 result
= chainon (result
, void_list_node
);
8517 /* D is a constructor or overloaded `operator='.
8519 Let T be the class in which D is declared. Then, this function
8522 -1 if D's is an ill-formed constructor or copy assignment operator
8523 whose first parameter is of type `T'.
8524 0 if D is not a copy constructor or copy assignment
8526 1 if D is a copy constructor or copy assignment operator whose
8527 first parameter is a reference to const qualified T.
8528 2 if D is a copy constructor or copy assignment operator whose
8529 first parameter is a reference to non-const qualified T.
8531 This function can be used as a predicate. Positive values indicate
8532 a copy constructor and nonzero values indicate a copy assignment
8542 gcc_assert (DECL_FUNCTION_MEMBER_P (d
));
8544 if (DECL_TEMPLATE_INFO (d
)
8545 && DECL_MEMBER_TEMPLATE_P (DECL_TI_TEMPLATE (d
)))
8546 /* Instantiations of template member functions are never copy
8547 functions. Note that member functions of templated classes are
8548 represented as template functions internally, and we must
8549 accept those as copy functions. */
8552 args
= FUNCTION_FIRST_USER_PARMTYPE (d
);
8556 arg_type
= TREE_VALUE (args
);
8558 if (TYPE_MAIN_VARIANT (arg_type
) == DECL_CONTEXT (d
))
8560 /* Pass by value copy assignment operator. */
8563 else if (TREE_CODE (arg_type
) == REFERENCE_TYPE
8564 && TYPE_MAIN_VARIANT (TREE_TYPE (arg_type
)) == DECL_CONTEXT (d
))
8566 if (CP_TYPE_CONST_P (TREE_TYPE (arg_type
)))
8572 args
= TREE_CHAIN (args
);
8574 if (args
&& args
!= void_list_node
&& !TREE_PURPOSE (args
))
8575 /* There are more non-optional args. */
8581 /* Remember any special properties of member function DECL. */
8583 void grok_special_member_properties (tree decl
)
8585 if (!DECL_NONSTATIC_MEMBER_FUNCTION_P(decl
))
8586 ; /* Not special. */
8587 else if (DECL_CONSTRUCTOR_P (decl
))
8589 int ctor
= copy_fn_p (decl
);
8595 A non-template constructor for class X is a copy
8596 constructor if its first parameter is of type X&, const
8597 X&, volatile X& or const volatile X&, and either there
8598 are no other parameters or else all other parameters have
8599 default arguments. */
8600 TYPE_HAS_INIT_REF (DECL_CONTEXT (decl
)) = 1;
8602 TYPE_HAS_CONST_INIT_REF (DECL_CONTEXT (decl
)) = 1;
8604 else if (sufficient_parms_p (FUNCTION_FIRST_USER_PARMTYPE (decl
)))
8605 TYPE_HAS_DEFAULT_CONSTRUCTOR (DECL_CONTEXT (decl
)) = 1;
8607 else if (DECL_OVERLOADED_OPERATOR_P (decl
) == NOP_EXPR
)
8611 A non-template assignment operator for class X is a copy
8612 assignment operator if its parameter is of type X, X&, const
8613 X&, volatile X& or const volatile X&. */
8615 int assop
= copy_fn_p (decl
);
8619 TYPE_HAS_ASSIGN_REF (DECL_CONTEXT (decl
)) = 1;
8621 TYPE_HAS_CONST_ASSIGN_REF (DECL_CONTEXT (decl
)) = 1;
8626 /* Check a constructor DECL has the correct form. Complains
8627 if the class has a constructor of the form X(X). */
8630 grok_ctor_properties (tree ctype
, tree decl
)
8632 int ctor_parm
= copy_fn_p (decl
);
8638 A declaration of a constructor for a class X is ill-formed if
8639 its first parameter is of type (optionally cv-qualified) X
8640 and either there are no other parameters or else all other
8641 parameters have default arguments.
8643 We *don't* complain about member template instantiations that
8644 have this form, though; they can occur as we try to decide
8645 what constructor to use during overload resolution. Since
8646 overload resolution will never prefer such a constructor to
8647 the non-template copy constructor (which is either explicitly
8648 or implicitly defined), there's no need to worry about their
8649 existence. Theoretically, they should never even be
8650 instantiated, but that's hard to forestall. */
8651 error ("invalid constructor; you probably meant %<%T (const %T&)%>",
8659 /* An operator with this code is unary, but can also be binary. */
8662 ambi_op_p (enum tree_code code
)
8664 return (code
== INDIRECT_REF
8665 || code
== ADDR_EXPR
8666 || code
== CONVERT_EXPR
8667 || code
== NEGATE_EXPR
8668 || code
== PREINCREMENT_EXPR
8669 || code
== PREDECREMENT_EXPR
);
8672 /* An operator with this name can only be unary. */
8675 unary_op_p (enum tree_code code
)
8677 return (code
== TRUTH_NOT_EXPR
8678 || code
== BIT_NOT_EXPR
8679 || code
== COMPONENT_REF
8680 || code
== TYPE_EXPR
);
8683 /* DECL is a declaration for an overloaded operator. Returns true if
8684 the declaration is valid; false otherwise. If COMPLAIN is true,
8685 errors are issued for invalid declarations. */
8688 grok_op_properties (tree decl
, int friendp
, bool complain
)
8690 tree argtypes
= TYPE_ARG_TYPES (TREE_TYPE (decl
));
8692 int methodp
= (TREE_CODE (TREE_TYPE (decl
)) == METHOD_TYPE
);
8693 tree name
= DECL_NAME (decl
);
8694 enum tree_code operator_code
;
8698 /* Assume that the declaration is valid. */
8701 /* Count the number of arguments. */
8702 for (argtype
= argtypes
, arity
= 0;
8703 argtype
&& argtype
!= void_list_node
;
8704 argtype
= TREE_CHAIN (argtype
))
8707 if (current_class_type
== NULL_TREE
)
8710 if (DECL_CONV_FN_P (decl
))
8711 operator_code
= TYPE_EXPR
;
8715 #define DEF_OPERATOR(NAME, CODE, MANGLING, ARITY, ASSN_P) \
8716 if (ansi_opname (CODE) == name) \
8718 operator_code = (CODE); \
8721 else if (ansi_assopname (CODE) == name) \
8723 operator_code = (CODE); \
8724 DECL_ASSIGNMENT_OPERATOR_P (decl) = 1; \
8728 #include "operators.def"
8734 gcc_assert (operator_code
!= LAST_CPLUS_TREE_CODE
);
8735 SET_OVERLOADED_OPERATOR_CODE (decl
, operator_code
);
8739 switch (operator_code
)
8742 TYPE_HAS_NEW_OPERATOR (current_class_type
) = 1;
8746 TYPE_GETS_DELETE (current_class_type
) |= 1;
8750 TYPE_HAS_ARRAY_NEW_OPERATOR (current_class_type
) = 1;
8753 case VEC_DELETE_EXPR
:
8754 TYPE_GETS_DELETE (current_class_type
) |= 2;
8762 /* [basic.std.dynamic.allocation]/1:
8764 A program is ill-formed if an allocation function is declared
8765 in a namespace scope other than global scope or declared static
8768 The same also holds true for deallocation functions. */
8769 if (operator_code
== NEW_EXPR
|| operator_code
== VEC_NEW_EXPR
8770 || operator_code
== DELETE_EXPR
|| operator_code
== VEC_DELETE_EXPR
)
8772 if (DECL_NAMESPACE_SCOPE_P (decl
))
8774 if (CP_DECL_CONTEXT (decl
) != global_namespace
)
8775 error ("%qD may not be declared within a namespace", decl
);
8776 else if (!TREE_PUBLIC (decl
))
8777 error ("%qD may not be declared as static", decl
);
8781 if (operator_code
== NEW_EXPR
|| operator_code
== VEC_NEW_EXPR
)
8782 TREE_TYPE (decl
) = coerce_new_type (TREE_TYPE (decl
));
8783 else if (operator_code
== DELETE_EXPR
|| operator_code
== VEC_DELETE_EXPR
)
8784 TREE_TYPE (decl
) = coerce_delete_type (TREE_TYPE (decl
));
8787 /* An operator function must either be a non-static member function
8788 or have at least one parameter of a class, a reference to a class,
8789 an enumeration, or a reference to an enumeration. 13.4.0.6 */
8790 if (! methodp
|| DECL_STATIC_FUNCTION_P (decl
))
8792 if (operator_code
== TYPE_EXPR
8793 || operator_code
== CALL_EXPR
8794 || operator_code
== COMPONENT_REF
8795 || operator_code
== ARRAY_REF
8796 || operator_code
== NOP_EXPR
)
8797 error ("%qD must be a nonstatic member function", decl
);
8802 if (DECL_STATIC_FUNCTION_P (decl
))
8803 error ("%qD must be either a non-static member "
8804 "function or a non-member function", decl
);
8806 for (p
= argtypes
; p
&& p
!= void_list_node
; p
= TREE_CHAIN (p
))
8808 tree arg
= non_reference (TREE_VALUE (p
));
8809 /* IS_AGGR_TYPE, rather than CLASS_TYPE_P, is used
8810 because these checks are performed even on
8811 template functions. */
8812 if (IS_AGGR_TYPE (arg
) || TREE_CODE (arg
) == ENUMERAL_TYPE
)
8816 if (!p
|| p
== void_list_node
)
8821 error ("%qD must have an argument of class or "
8829 /* There are no restrictions on the arguments to an overloaded
8831 if (operator_code
== CALL_EXPR
)
8834 if (IDENTIFIER_TYPENAME_P (name
) && ! DECL_TEMPLATE_INFO (decl
))
8836 tree t
= TREE_TYPE (name
);
8839 int ref
= (TREE_CODE (t
) == REFERENCE_TYPE
);
8840 const char *what
= 0;
8843 t
= TYPE_MAIN_VARIANT (TREE_TYPE (t
));
8845 if (TREE_CODE (t
) == VOID_TYPE
)
8847 else if (t
== current_class_type
)
8848 what
= "the same type";
8849 /* Don't force t to be complete here. */
8850 else if (IS_AGGR_TYPE (t
)
8851 && COMPLETE_TYPE_P (t
)
8852 && DERIVED_FROM_P (t
, current_class_type
))
8853 what
= "a base class";
8855 if (what
&& warn_conversion
)
8856 warning ("conversion to %s%s will never use a type "
8857 "conversion operator",
8858 ref
? "a reference to " : "", what
);
8861 if (operator_code
== COND_EXPR
)
8864 error ("ISO C++ prohibits overloading operator ?:");
8866 else if (ambi_op_p (operator_code
))
8869 /* We pick the one-argument operator codes by default, so
8870 we don't have to change anything. */
8872 else if (arity
== 2)
8874 /* If we thought this was a unary operator, we now know
8875 it to be a binary operator. */
8876 switch (operator_code
)
8879 operator_code
= MULT_EXPR
;
8883 operator_code
= BIT_AND_EXPR
;
8887 operator_code
= PLUS_EXPR
;
8891 operator_code
= MINUS_EXPR
;
8894 case PREINCREMENT_EXPR
:
8895 operator_code
= POSTINCREMENT_EXPR
;
8898 case PREDECREMENT_EXPR
:
8899 operator_code
= POSTDECREMENT_EXPR
;
8906 SET_OVERLOADED_OPERATOR_CODE (decl
, operator_code
);
8908 if ((operator_code
== POSTINCREMENT_EXPR
8909 || operator_code
== POSTDECREMENT_EXPR
)
8910 && ! processing_template_decl
8911 && ! same_type_p (TREE_VALUE (TREE_CHAIN (argtypes
)), integer_type_node
))
8914 error ("postfix %qD must take %<int%> as its argument",
8918 ("postfix %qD must take %<int%> as its second argument",
8925 error ("%qD must take either zero or one argument", decl
);
8927 error ("%qD must take either one or two arguments", decl
);
8930 /* More Effective C++ rule 6. */
8932 && (operator_code
== POSTINCREMENT_EXPR
8933 || operator_code
== POSTDECREMENT_EXPR
8934 || operator_code
== PREINCREMENT_EXPR
8935 || operator_code
== PREDECREMENT_EXPR
))
8937 tree arg
= TREE_VALUE (argtypes
);
8938 tree ret
= TREE_TYPE (TREE_TYPE (decl
));
8939 if (methodp
|| TREE_CODE (arg
) == REFERENCE_TYPE
)
8940 arg
= TREE_TYPE (arg
);
8941 arg
= TYPE_MAIN_VARIANT (arg
);
8942 if (operator_code
== PREINCREMENT_EXPR
8943 || operator_code
== PREDECREMENT_EXPR
)
8945 if (TREE_CODE (ret
) != REFERENCE_TYPE
8946 || !same_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (ret
)),
8948 warning ("prefix %qD should return %qT", decl
,
8949 build_reference_type (arg
));
8953 if (!same_type_p (TYPE_MAIN_VARIANT (ret
), arg
))
8954 warning ("postfix %qD should return %qT", decl
, arg
);
8958 else if (unary_op_p (operator_code
))
8963 error ("%qD must take %<void%>", decl
);
8965 error ("%qD must take exactly one argument", decl
);
8968 else /* if (binary_op_p (operator_code)) */
8973 error ("%qD must take exactly one argument", decl
);
8975 error ("%qD must take exactly two arguments", decl
);
8978 /* More Effective C++ rule 7. */
8980 && (operator_code
== TRUTH_ANDIF_EXPR
8981 || operator_code
== TRUTH_ORIF_EXPR
8982 || operator_code
== COMPOUND_EXPR
))
8983 warning ("user-defined %qD always evaluates both arguments",
8987 /* Effective C++ rule 23. */
8990 && !DECL_ASSIGNMENT_OPERATOR_P (decl
)
8991 && (operator_code
== PLUS_EXPR
8992 || operator_code
== MINUS_EXPR
8993 || operator_code
== TRUNC_DIV_EXPR
8994 || operator_code
== MULT_EXPR
8995 || operator_code
== TRUNC_MOD_EXPR
)
8996 && TREE_CODE (TREE_TYPE (TREE_TYPE (decl
))) == REFERENCE_TYPE
)
8997 warning ("%qD should return by value", decl
);
9000 for (; argtypes
&& argtypes
!= void_list_node
;
9001 argtypes
= TREE_CHAIN (argtypes
))
9002 if (TREE_PURPOSE (argtypes
))
9004 TREE_PURPOSE (argtypes
) = NULL_TREE
;
9005 if (operator_code
== POSTINCREMENT_EXPR
9006 || operator_code
== POSTDECREMENT_EXPR
)
9009 pedwarn ("%qD cannot have default arguments", decl
);
9012 error ("%qD cannot have default arguments", decl
);
9021 tag_name (enum tag_types code
)
9038 /* Name lookup in an elaborated-type-specifier (after the keyword
9039 indicated by TAG_CODE) has found the TYPE_DECL DECL. If the
9040 elaborated-type-specifier is invalid, issue a diagnostic and return
9041 error_mark_node; otherwise, return the *_TYPE to which it referred.
9042 If ALLOW_TEMPLATE_P is true, TYPE may be a class template. */
9045 check_elaborated_type_specifier (enum tag_types tag_code
,
9047 bool allow_template_p
)
9053 struct S { struct S *p; };
9055 name lookup will find the TYPE_DECL for the implicit "S::S"
9056 typedef. Adjust for that here. */
9057 if (DECL_SELF_REFERENCE_P (decl
))
9058 decl
= TYPE_NAME (TREE_TYPE (decl
));
9060 type
= TREE_TYPE (decl
);
9062 /* Check TEMPLATE_TYPE_PARM first because DECL_IMPLICIT_TYPEDEF_P
9063 is false for this case as well. */
9064 if (TREE_CODE (type
) == TEMPLATE_TYPE_PARM
)
9066 error ("using template type parameter %qT after %qs",
9067 type
, tag_name (tag_code
));
9068 return error_mark_node
;
9072 If the identifier resolves to a typedef-name or a template
9073 type-parameter, the elaborated-type-specifier is ill-formed.
9075 In other words, the only legitimate declaration to use in the
9076 elaborated type specifier is the implicit typedef created when
9077 the type is declared. */
9078 else if (!DECL_IMPLICIT_TYPEDEF_P (decl
))
9080 error ("using typedef-name %qD after %qs", decl
, tag_name (tag_code
));
9081 cp_error_at ("%qD has a previous declaration here", decl
);
9082 return error_mark_node
;
9084 else if (TREE_CODE (type
) != RECORD_TYPE
9085 && TREE_CODE (type
) != UNION_TYPE
9086 && tag_code
!= enum_type
)
9088 error ("%qT referred to as %qs", type
, tag_name (tag_code
));
9089 cp_error_at ("%qT has a previous declaration here", type
);
9090 return error_mark_node
;
9092 else if (TREE_CODE (type
) != ENUMERAL_TYPE
9093 && tag_code
== enum_type
)
9095 error ("%qT referred to as enum", type
);
9096 cp_error_at ("%qT has a previous declaration here", type
);
9097 return error_mark_node
;
9099 else if (!allow_template_p
9100 && TREE_CODE (type
) == RECORD_TYPE
9101 && CLASSTYPE_IS_TEMPLATE (type
))
9103 /* If a class template appears as elaborated type specifier
9104 without a template header such as:
9106 template <class T> class C {};
9107 void f(class C); // No template header here
9109 then the required template argument is missing. */
9111 error ("template argument required for %<%s %T%>",
9112 tag_name (tag_code
),
9113 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type
)));
9114 return error_mark_node
;
9120 /* Lookup NAME in elaborate type specifier in scope according to
9121 GLOBALIZE and issue diagnostics if necessary.
9122 Return *_TYPE node upon success, NULL_TREE when the NAME is not
9123 found, and ERROR_MARK_NODE for type error. */
9126 lookup_and_check_tag (enum tag_types tag_code
, tree name
,
9127 bool globalize
, bool template_header_p
)
9132 decl
= lookup_name (name
, 2);
9134 decl
= lookup_type_scope (name
);
9136 if (decl
&& DECL_CLASS_TEMPLATE_P (decl
))
9137 decl
= DECL_TEMPLATE_RESULT (decl
);
9139 if (decl
&& TREE_CODE (decl
) == TYPE_DECL
)
9141 /* Two cases we need to consider when deciding if a class
9142 template is allowed as an elaborated type specifier:
9143 1. It is a self reference to its own class.
9144 2. It comes with a template header.
9148 template <class T> class C {
9149 class C *c1; // DECL_SELF_REFERENCE_P is true
9152 template <class U> class C; // template_header_p is true
9153 template <class T> class C<T>::D {
9154 class C *c2; // DECL_SELF_REFERENCE_P is true
9157 t
= check_elaborated_type_specifier (tag_code
,
9160 | DECL_SELF_REFERENCE_P (decl
));
9167 /* Get the struct, enum or union (TAG_CODE says which) with tag NAME.
9168 Define the tag as a forward-reference if it is not defined.
9170 If a declaration is given, process it here, and report an error if
9171 multiple declarations are not identical.
9173 GLOBALIZE is false when this is also a definition. Only look in
9174 the current frame for the name (since C++ allows new names in any
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 bool globalize
, 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 globalize
, template_header_p
);
9216 if (t
== error_mark_node
)
9217 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP
, error_mark_node
);
9219 if (globalize
&& t
&& current_class_type
9220 && template_class_depth (current_class_type
)
9221 && template_header_p
)
9223 /* Since GLOBALIZE is nonzero, 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 (name
, t
, globalize
);
9283 if (!globalize
&& processing_template_decl
&& IS_AGGR_TYPE (t
))
9284 redeclare_class_template (t
, current_template_parms
);
9285 else if (!processing_template_decl
9287 && CLASSTYPE_IS_TEMPLATE (t
))
9289 error ("redeclaration of %qT as a non-template", t
);
9290 t
= error_mark_node
;
9294 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP
, t
);
9298 xref_tag_from_type (tree old
, tree id
, int globalize
)
9300 enum tag_types tag_kind
;
9302 if (TREE_CODE (old
) == RECORD_TYPE
)
9303 tag_kind
= (CLASSTYPE_DECLARED_CLASS (old
) ? class_type
: record_type
);
9305 tag_kind
= union_type
;
9307 if (id
== NULL_TREE
)
9308 id
= TYPE_IDENTIFIER (old
);
9310 return xref_tag (tag_kind
, id
, globalize
, false);
9313 /* Create the binfo hierarchy for REF with (possibly NULL) base list
9314 BASE_LIST. For each element on BASE_LIST the TREE_PURPOSE is an
9315 access_* node, and the TREE_VALUE is the type of the base-class.
9316 Non-NULL TREE_TYPE indicates virtual inheritance. */
9319 xref_basetypes (tree ref
, tree base_list
)
9322 tree binfo
, base_binfo
;
9323 unsigned max_vbases
= 0; /* Maximum direct & indirect virtual bases. */
9324 unsigned max_bases
= 0; /* Maximum direct bases. */
9326 tree default_access
;
9327 tree igo_prev
; /* Track Inheritance Graph Order. */
9329 if (ref
== error_mark_node
)
9332 /* The base of a derived class is private by default, all others are
9334 default_access
= (TREE_CODE (ref
) == RECORD_TYPE
9335 && CLASSTYPE_DECLARED_CLASS (ref
)
9336 ? access_private_node
: access_public_node
);
9338 /* First, make sure that any templates in base-classes are
9339 instantiated. This ensures that if we call ourselves recursively
9340 we do not get confused about which classes are marked and which
9345 tree basetype
= TREE_VALUE (*basep
);
9347 if (!(processing_template_decl
&& uses_template_parms (basetype
))
9348 && !complete_type_or_else (basetype
, NULL
))
9349 /* An incomplete type. Remove it from the list. */
9350 *basep
= TREE_CHAIN (*basep
);
9354 if (TREE_TYPE (*basep
))
9356 if (CLASS_TYPE_P (basetype
))
9357 max_vbases
+= VEC_length (tree
, CLASSTYPE_VBASECLASSES (basetype
));
9358 basep
= &TREE_CHAIN (*basep
);
9362 TYPE_MARKED_P (ref
) = 1;
9364 /* The binfo slot should be empty, unless this is an (ill-formed)
9366 gcc_assert (!TYPE_BINFO (ref
) || TYPE_SIZE (ref
));
9367 gcc_assert (TYPE_MAIN_VARIANT (ref
) == ref
);
9369 binfo
= make_tree_binfo (max_bases
);
9371 TYPE_BINFO (ref
) = binfo
;
9372 BINFO_OFFSET (binfo
) = size_zero_node
;
9373 BINFO_TYPE (binfo
) = ref
;
9377 BINFO_BASE_ACCESSES (binfo
) = VEC_alloc (tree
, max_bases
);
9378 /* An aggregate cannot have baseclasses. */
9379 CLASSTYPE_NON_AGGREGATE (ref
) = 1;
9381 if (TREE_CODE (ref
) == UNION_TYPE
)
9382 error ("derived union %qT invalid", ref
);
9387 if (TYPE_FOR_JAVA (ref
))
9388 error ("Java class %qT cannot have multiple bases", ref
);
9393 CLASSTYPE_VBASECLASSES (ref
) = VEC_alloc (tree
, max_vbases
);
9395 if (TYPE_FOR_JAVA (ref
))
9396 error ("Java class %qT cannot have virtual bases", ref
);
9399 for (igo_prev
= binfo
; base_list
; base_list
= TREE_CHAIN (base_list
))
9401 tree access
= TREE_PURPOSE (base_list
);
9402 int via_virtual
= TREE_TYPE (base_list
) != NULL_TREE
;
9403 tree basetype
= TREE_VALUE (base_list
);
9405 if (access
== access_default_node
)
9406 access
= default_access
;
9408 if (TREE_CODE (basetype
) == TYPE_DECL
)
9409 basetype
= TREE_TYPE (basetype
);
9410 if (TREE_CODE (basetype
) != RECORD_TYPE
9411 && TREE_CODE (basetype
) != TYPENAME_TYPE
9412 && TREE_CODE (basetype
) != TEMPLATE_TYPE_PARM
9413 && TREE_CODE (basetype
) != BOUND_TEMPLATE_TEMPLATE_PARM
)
9415 error ("base type %qT fails to be a struct or class type",
9420 if (TYPE_FOR_JAVA (basetype
) && (current_lang_depth () == 0))
9421 TYPE_FOR_JAVA (ref
) = 1;
9423 base_binfo
= NULL_TREE
;
9424 if (CLASS_TYPE_P (basetype
) && !dependent_type_p (basetype
))
9426 base_binfo
= TYPE_BINFO (basetype
);
9427 /* The original basetype could have been a typedef'd type. */
9428 basetype
= BINFO_TYPE (base_binfo
);
9430 /* Inherit flags from the base. */
9431 TYPE_HAS_NEW_OPERATOR (ref
)
9432 |= TYPE_HAS_NEW_OPERATOR (basetype
);
9433 TYPE_HAS_ARRAY_NEW_OPERATOR (ref
)
9434 |= TYPE_HAS_ARRAY_NEW_OPERATOR (basetype
);
9435 TYPE_GETS_DELETE (ref
) |= TYPE_GETS_DELETE (basetype
);
9436 TYPE_HAS_CONVERSION (ref
) |= TYPE_HAS_CONVERSION (basetype
);
9437 CLASSTYPE_DIAMOND_SHAPED_P (ref
)
9438 |= CLASSTYPE_DIAMOND_SHAPED_P (basetype
);
9439 CLASSTYPE_REPEATED_BASE_P (ref
)
9440 |= CLASSTYPE_REPEATED_BASE_P (basetype
);
9443 /* We must do this test after we've seen through a typedef
9445 if (TYPE_MARKED_P (basetype
))
9447 if (basetype
== ref
)
9448 error ("recursive type %qT undefined", basetype
);
9450 error ("duplicate base type %qT invalid", basetype
);
9453 TYPE_MARKED_P (basetype
) = 1;
9455 base_binfo
= copy_binfo (base_binfo
, basetype
, ref
,
9456 &igo_prev
, via_virtual
);
9457 if (!BINFO_INHERITANCE_CHAIN (base_binfo
))
9458 BINFO_INHERITANCE_CHAIN (base_binfo
) = binfo
;
9460 BINFO_BASE_APPEND (binfo
, base_binfo
);
9461 BINFO_BASE_ACCESS_APPEND (binfo
, access
);
9464 if (VEC_space (tree
, CLASSTYPE_VBASECLASSES (ref
), 1))
9465 /* If we have space in the vbase vector, we must have shared at
9466 least one of them, and are therefore diamond shaped. */
9467 CLASSTYPE_DIAMOND_SHAPED_P (ref
) = 1;
9469 /* Unmark all the types. */
9470 for (i
= 0; BINFO_BASE_ITERATE (binfo
, i
, base_binfo
); i
++)
9471 TYPE_MARKED_P (BINFO_TYPE (base_binfo
)) = 0;
9472 TYPE_MARKED_P (ref
) = 0;
9474 /* Now see if we have a repeated base type. */
9475 if (!CLASSTYPE_REPEATED_BASE_P (ref
))
9477 for (base_binfo
= binfo
; base_binfo
;
9478 base_binfo
= TREE_CHAIN (base_binfo
))
9480 if (TYPE_MARKED_P (BINFO_TYPE (base_binfo
)))
9482 CLASSTYPE_REPEATED_BASE_P (ref
) = 1;
9485 TYPE_MARKED_P (BINFO_TYPE (base_binfo
)) = 1;
9487 for (base_binfo
= binfo
; base_binfo
;
9488 base_binfo
= TREE_CHAIN (base_binfo
))
9489 if (TYPE_MARKED_P (BINFO_TYPE (base_binfo
)))
9490 TYPE_MARKED_P (BINFO_TYPE (base_binfo
)) = 0;
9497 /* Begin compiling the definition of an enumeration type.
9498 NAME is its name (or null if anonymous).
9499 Returns the type object, as yet incomplete.
9500 Also records info about it so that build_enumerator
9501 may be used to declare the individual values as they are read. */
9504 start_enum (tree name
)
9506 tree enumtype
= NULL_TREE
;
9508 /* If this is the real definition for a previous forward reference,
9509 fill in the contents in the same object that used to be the
9510 forward reference. */
9512 if (name
!= NULL_TREE
)
9513 enumtype
= lookup_and_check_tag (enum_type
, name
, 0, 0);
9515 if (enumtype
!= NULL_TREE
&& TREE_CODE (enumtype
) == ENUMERAL_TYPE
)
9517 error ("multiple definition of %q#T", enumtype
);
9518 error ("%Jprevious definition here", TYPE_MAIN_DECL (enumtype
));
9519 /* Clear out TYPE_VALUES, and start again. */
9520 TYPE_VALUES (enumtype
) = NULL_TREE
;
9524 enumtype
= make_node (ENUMERAL_TYPE
);
9525 pushtag (name
, enumtype
, 0);
9531 /* After processing and defining all the values of an enumeration type,
9532 install their decls in the enumeration type and finish it off.
9533 ENUMTYPE is the type object and VALUES a list of name-value pairs. */
9536 finish_enum (tree enumtype
)
9545 bool use_short_enum
;
9549 integer_type_kind itk
;
9550 tree underlying_type
= NULL_TREE
;
9552 /* We built up the VALUES in reverse order. */
9553 TYPE_VALUES (enumtype
) = nreverse (TYPE_VALUES (enumtype
));
9555 /* For an enum defined in a template, just set the type of the values;
9556 all further processing is postponed until the template is
9557 instantiated. We need to set the type so that tsubst of a CONST_DECL
9559 if (processing_template_decl
)
9561 for (values
= TYPE_VALUES (enumtype
);
9563 values
= TREE_CHAIN (values
))
9564 TREE_TYPE (TREE_VALUE (values
)) = enumtype
;
9565 if (at_function_scope_p ())
9566 add_stmt (build_min (TAG_DEFN
, enumtype
));
9570 /* Determine the minimum and maximum values of the enumerators. */
9571 if (TYPE_VALUES (enumtype
))
9573 minnode
= maxnode
= NULL_TREE
;
9575 for (values
= TYPE_VALUES (enumtype
);
9577 values
= TREE_CHAIN (values
))
9579 decl
= TREE_VALUE (values
);
9581 /* [dcl.enum]: Following the closing brace of an enum-specifier,
9582 each enumerator has the type of its enumeration. Prior to the
9583 closing brace, the type of each enumerator is the type of its
9584 initializing value. */
9585 TREE_TYPE (decl
) = enumtype
;
9587 /* Update the minimum and maximum values, if appropriate. */
9588 value
= DECL_INITIAL (decl
);
9589 /* Figure out what the minimum and maximum values of the
9592 minnode
= maxnode
= value
;
9593 else if (tree_int_cst_lt (maxnode
, value
))
9595 else if (tree_int_cst_lt (value
, minnode
))
9602 If the enumerator-list is empty, the underlying type is as if
9603 the enumeration had a single enumerator with value 0. */
9604 minnode
= maxnode
= integer_zero_node
;
9606 /* Compute the number of bits require to represent all values of the
9607 enumeration. We must do this before the type of MINNODE and
9608 MAXNODE are transformed, since min_precision relies on the
9609 TREE_TYPE of the value it is passed. */
9610 unsignedp
= tree_int_cst_sgn (minnode
) >= 0;
9611 lowprec
= min_precision (minnode
, unsignedp
);
9612 highprec
= min_precision (maxnode
, unsignedp
);
9613 precision
= MAX (lowprec
, highprec
);
9615 /* Determine the underlying type of the enumeration.
9619 The underlying type of an enumeration is an integral type that
9620 can represent all the enumerator values defined in the
9621 enumeration. It is implementation-defined which integral type is
9622 used as the underlying type for an enumeration except that the
9623 underlying type shall not be larger than int unless the value of
9624 an enumerator cannot fit in an int or unsigned int.
9626 We use "int" or an "unsigned int" as the underlying type, even if
9627 a smaller integral type would work, unless the user has
9628 explicitly requested that we use the smallest possible type. The
9629 user can request that for all enumerations with a command line
9630 flag, or for just one enumeration with an attribute. */
9632 use_short_enum
= flag_short_enums
9633 || lookup_attribute ("packed", TYPE_ATTRIBUTES (enumtype
));
9635 for (itk
= (use_short_enum
? itk_char
: itk_int
);
9639 underlying_type
= integer_types
[itk
];
9640 if (TYPE_PRECISION (underlying_type
) >= precision
9641 && TYPE_UNSIGNED (underlying_type
) == unsignedp
)
9644 if (itk
== itk_none
)
9648 IF no integral type can represent all the enumerator values, the
9649 enumeration is ill-formed. */
9650 error ("no integral type can represent all of the enumerator values "
9651 "for %qT", enumtype
);
9652 precision
= TYPE_PRECISION (long_long_integer_type_node
);
9653 underlying_type
= integer_types
[itk_unsigned_long_long
];
9656 /* Compute the minium and maximum values for the type.
9660 For an enumeration where emin is the smallest enumerator and emax
9661 is the largest, the values of the enumeration are the values of the
9662 underlying type in the range bmin to bmax, where bmin and bmax are,
9663 respectively, the smallest and largest values of the smallest bit-
9664 field that can store emin and emax. */
9666 /* The middle-end currently assumes that types with TYPE_PRECISION
9667 narrower than their underlying type are suitably zero or sign
9668 extended to fill their mode. g++ doesn't make these guarantees.
9669 Until the middle-end can represent such paradoxical types, we
9670 set the TYPE_PRECISION to the width of the underlying type. */
9671 TYPE_PRECISION (enumtype
) = TYPE_PRECISION (underlying_type
);
9673 set_min_and_max_values_for_integral_type (enumtype
, precision
, unsignedp
);
9677 The value of sizeof() applied to an enumeration type, an object
9678 of an enumeration type, or an enumerator, is the value of sizeof()
9679 applied to the underlying type. */
9680 TYPE_SIZE (enumtype
) = TYPE_SIZE (underlying_type
);
9681 TYPE_SIZE_UNIT (enumtype
) = TYPE_SIZE_UNIT (underlying_type
);
9682 TYPE_MODE (enumtype
) = TYPE_MODE (underlying_type
);
9683 TYPE_ALIGN (enumtype
) = TYPE_ALIGN (underlying_type
);
9684 TYPE_USER_ALIGN (enumtype
) = TYPE_USER_ALIGN (underlying_type
);
9685 TYPE_UNSIGNED (enumtype
) = TYPE_UNSIGNED (underlying_type
);
9687 /* Convert each of the enumerators to the type of the underlying
9688 type of the enumeration. */
9689 for (values
= TYPE_VALUES (enumtype
); values
; values
= TREE_CHAIN (values
))
9691 decl
= TREE_VALUE (values
);
9692 value
= perform_implicit_conversion (underlying_type
,
9693 DECL_INITIAL (decl
));
9695 /* Do not clobber shared ints. */
9696 value
= copy_node (value
);
9698 TREE_TYPE (value
) = enumtype
;
9699 DECL_INITIAL (decl
) = value
;
9700 TREE_VALUE (values
) = value
;
9703 /* Fix up all variant types of this enum type. */
9704 for (t
= TYPE_MAIN_VARIANT (enumtype
); t
; t
= TYPE_NEXT_VARIANT (t
))
9706 TYPE_VALUES (t
) = TYPE_VALUES (enumtype
);
9707 TYPE_MIN_VALUE (t
) = TYPE_MIN_VALUE (enumtype
);
9708 TYPE_MAX_VALUE (t
) = TYPE_MAX_VALUE (enumtype
);
9709 TYPE_SIZE (t
) = TYPE_SIZE (enumtype
);
9710 TYPE_SIZE_UNIT (t
) = TYPE_SIZE_UNIT (enumtype
);
9711 TYPE_MODE (t
) = TYPE_MODE (enumtype
);
9712 TYPE_PRECISION (t
) = TYPE_PRECISION (enumtype
);
9713 TYPE_ALIGN (t
) = TYPE_ALIGN (enumtype
);
9714 TYPE_USER_ALIGN (t
) = TYPE_USER_ALIGN (enumtype
);
9715 TYPE_UNSIGNED (t
) = TYPE_UNSIGNED (enumtype
);
9718 /* Finish debugging output for this type. */
9719 rest_of_type_compilation (enumtype
, namespace_bindings_p ());
9722 /* Build and install a CONST_DECL for an enumeration constant of the
9723 enumeration type ENUMTYPE whose NAME and VALUE (if any) are provided.
9724 Assignment of sequential values by default is handled here. */
9727 build_enumerator (tree name
, tree value
, tree enumtype
)
9733 /* Remove no-op casts from the value. */
9735 STRIP_TYPE_NOPS (value
);
9737 if (! processing_template_decl
)
9739 /* Validate and default VALUE. */
9740 if (value
!= NULL_TREE
)
9742 value
= decl_constant_value (value
);
9744 if (TREE_CODE (value
) == INTEGER_CST
)
9746 value
= perform_integral_promotions (value
);
9747 constant_expression_warning (value
);
9751 error ("enumerator value for %qD not integer constant", name
);
9756 /* Default based on previous value. */
9757 if (value
== NULL_TREE
)
9759 if (TYPE_VALUES (enumtype
))
9762 unsigned HOST_WIDE_INT lo
;
9766 /* The next value is the previous value plus one. We can
9767 safely assume that the previous value is an INTEGER_CST.
9768 add_double doesn't know the type of the target expression,
9769 so we must check with int_fits_type_p as well. */
9770 prev_value
= DECL_INITIAL (TREE_VALUE (TYPE_VALUES (enumtype
)));
9771 overflowed
= add_double (TREE_INT_CST_LOW (prev_value
),
9772 TREE_INT_CST_HIGH (prev_value
),
9774 value
= build_int_cst_wide (TREE_TYPE (prev_value
), lo
, hi
);
9775 overflowed
|= !int_fits_type_p (value
, TREE_TYPE (prev_value
));
9778 error ("overflow in enumeration values at %qD", name
);
9781 value
= integer_zero_node
;
9784 /* Remove no-op casts from the value. */
9785 STRIP_TYPE_NOPS (value
);
9788 /* C++ associates enums with global, function, or class declarations. */
9789 context
= current_scope ();
9791 /* Build the actual enumeration constant. Note that the enumeration
9792 constants have the type of their initializers until the
9793 enumeration is complete:
9797 Following the closing brace of an enum-specifier, each enumer-
9798 ator has the type of its enumeration. Prior to the closing
9799 brace, the type of each enumerator is the type of its
9802 In finish_enum we will reset the type. Of course, if we're
9803 processing a template, there may be no value. */
9804 type
= value
? TREE_TYPE (value
) : NULL_TREE
;
9806 if (context
&& context
== current_class_type
)
9807 /* This enum declaration is local to the class. We need the full
9808 lang_decl so that we can record DECL_CLASS_CONTEXT, for example. */
9809 decl
= build_lang_decl (CONST_DECL
, name
, type
);
9811 /* It's a global enum, or it's local to a function. (Note local to
9812 a function could mean local to a class method. */
9813 decl
= build_decl (CONST_DECL
, name
, type
);
9815 DECL_CONTEXT (decl
) = FROB_CONTEXT (context
);
9816 TREE_CONSTANT (decl
) = 1;
9817 TREE_INVARIANT (decl
) = 1;
9818 TREE_READONLY (decl
) = 1;
9819 DECL_INITIAL (decl
) = value
;
9821 if (context
&& context
== current_class_type
)
9822 /* In something like `struct S { enum E { i = 7 }; };' we put `i'
9823 on the TYPE_FIELDS list for `S'. (That's so that you can say
9824 things like `S::i' later.) */
9825 finish_member_declaration (decl
);
9829 /* Add this enumeration constant to the list for this type. */
9830 TYPE_VALUES (enumtype
) = tree_cons (name
, decl
, TYPE_VALUES (enumtype
));
9834 /* We're defining DECL. Make sure that it's type is OK. */
9837 check_function_type (tree decl
, tree current_function_parms
)
9839 tree fntype
= TREE_TYPE (decl
);
9840 tree return_type
= complete_type (TREE_TYPE (fntype
));
9842 /* In a function definition, arg types must be complete. */
9843 require_complete_types_for_parms (current_function_parms
);
9845 if (dependent_type_p (return_type
))
9847 if (!COMPLETE_OR_VOID_TYPE_P (return_type
))
9849 error ("return type %q#T is incomplete", TREE_TYPE (fntype
));
9851 /* Make it return void instead, but don't change the
9852 type of the DECL_RESULT, in case we have a named return value. */
9853 if (TREE_CODE (fntype
) == METHOD_TYPE
)
9855 tree ctype
= TREE_TYPE (TREE_VALUE (TYPE_ARG_TYPES (fntype
)));
9857 = build_method_type_directly (ctype
,
9859 FUNCTION_ARG_CHAIN (decl
));
9863 = build_function_type (void_type_node
,
9864 TYPE_ARG_TYPES (TREE_TYPE (decl
)));
9866 = build_exception_variant (fntype
,
9867 TYPE_RAISES_EXCEPTIONS (fntype
));
9870 abstract_virtuals_error (decl
, TREE_TYPE (fntype
));
9873 /* Create the FUNCTION_DECL for a function definition.
9874 DECLSPECS and DECLARATOR are the parts of the declaration;
9875 they describe the function's name and the type it returns,
9876 but twisted together in a fashion that parallels the syntax of C.
9878 FLAGS is a bitwise or of SF_PRE_PARSED (indicating that the
9879 DECLARATOR is really the DECL for the function we are about to
9880 process and that DECLSPECS should be ignored), SF_INCLASS_INLINE
9881 indicating that the function is an inline defined in-class.
9883 This function creates a binding context for the function body
9884 as well as setting up the FUNCTION_DECL in current_function_decl.
9886 For C++, we must first check whether that datum makes any sense.
9887 For example, "class A local_a(1,2);" means that variable local_a
9888 is an aggregate of type A, which should have a constructor
9889 applied to it with the argument list [1, 2]. */
9892 start_preparsed_function (tree decl1
, tree attrs
, int flags
)
9894 tree ctype
= NULL_TREE
;
9897 int doing_friend
= 0;
9898 struct cp_binding_level
*bl
;
9899 tree current_function_parms
;
9900 struct c_fileinfo
*finfo
= get_fileinfo (lbasename (input_filename
));
9903 gcc_assert (TREE_CODE (TREE_VALUE (void_list_node
)) == VOID_TYPE
);
9904 gcc_assert (TREE_CHAIN (void_list_node
) == NULL_TREE
);
9906 fntype
= TREE_TYPE (decl1
);
9907 if (TREE_CODE (fntype
) == METHOD_TYPE
)
9908 ctype
= TYPE_METHOD_BASETYPE (fntype
);
9910 /* ISO C++ 11.4/5. A friend function defined in a class is in
9911 the (lexical) scope of the class in which it is defined. */
9912 if (!ctype
&& DECL_FRIEND_P (decl1
))
9914 ctype
= DECL_FRIEND_CONTEXT (decl1
);
9916 /* CTYPE could be null here if we're dealing with a template;
9917 for example, `inline friend float foo()' inside a template
9918 will have no CTYPE set. */
9919 if (ctype
&& TREE_CODE (ctype
) != RECORD_TYPE
)
9925 if (DECL_DECLARED_INLINE_P (decl1
)
9926 && lookup_attribute ("noinline", attrs
))
9927 warning ("%Jinline function %qD given attribute noinline", decl1
, decl1
);
9929 if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (decl1
))
9930 /* This is a constructor, we must ensure that any default args
9931 introduced by this definition are propagated to the clones
9932 now. The clones are used directly in overload resolution. */
9933 adjust_clone_args (decl1
);
9935 /* Sometimes we don't notice that a function is a static member, and
9936 build a METHOD_TYPE for it. Fix that up now. */
9937 if (ctype
!= NULL_TREE
&& DECL_STATIC_FUNCTION_P (decl1
)
9938 && TREE_CODE (TREE_TYPE (decl1
)) == METHOD_TYPE
)
9940 revert_static_member_fn (decl1
);
9944 /* Set up current_class_type, and enter the scope of the class, if
9947 push_nested_class (ctype
);
9948 else if (DECL_STATIC_FUNCTION_P (decl1
))
9949 push_nested_class (DECL_CONTEXT (decl1
));
9951 /* Now that we have entered the scope of the class, we must restore
9952 the bindings for any template parameters surrounding DECL1, if it
9953 is an inline member template. (Order is important; consider the
9954 case where a template parameter has the same name as a field of
9955 the class.) It is not until after this point that
9956 PROCESSING_TEMPLATE_DECL is guaranteed to be set up correctly. */
9957 if (flags
& SF_INCLASS_INLINE
)
9958 maybe_begin_member_template_processing (decl1
);
9960 /* Effective C++ rule 15. */
9962 && DECL_OVERLOADED_OPERATOR_P (decl1
) == NOP_EXPR
9963 && TREE_CODE (TREE_TYPE (fntype
)) == VOID_TYPE
)
9964 warning ("%<operator=%> should return a reference to %<*this%>");
9966 /* Make the init_value nonzero so pushdecl knows this is not tentative.
9967 error_mark_node is replaced below (in poplevel) with the BLOCK. */
9968 if (!DECL_INITIAL (decl1
))
9969 DECL_INITIAL (decl1
) = error_mark_node
;
9971 /* This function exists in static storage.
9972 (This does not mean `static' in the C sense!) */
9973 TREE_STATIC (decl1
) = 1;
9975 /* We must call push_template_decl after current_class_type is set
9976 up. (If we are processing inline definitions after exiting a
9977 class scope, current_class_type will be NULL_TREE until set above
9978 by push_nested_class.) */
9979 if (processing_template_decl
)
9980 decl1
= push_template_decl (decl1
);
9982 /* We are now in the scope of the function being defined. */
9983 current_function_decl
= decl1
;
9985 /* Save the parm names or decls from this function's declarator
9986 where store_parm_decls will find them. */
9987 current_function_parms
= DECL_ARGUMENTS (decl1
);
9989 /* Make sure the parameter and return types are reasonable. When
9990 you declare a function, these types can be incomplete, but they
9991 must be complete when you define the function. */
9992 check_function_type (decl1
, current_function_parms
);
9994 /* Build the return declaration for the function. */
9995 restype
= TREE_TYPE (fntype
);
9996 /* Promote the value to int before returning it. */
9997 if (c_promoting_integer_type_p (restype
))
9998 restype
= type_promotes_to (restype
);
9999 if (DECL_RESULT (decl1
) == NULL_TREE
)
10003 resdecl
= build_decl (RESULT_DECL
, 0, TYPE_MAIN_VARIANT (restype
));
10004 DECL_ARTIFICIAL (resdecl
) = 1;
10005 DECL_IGNORED_P (resdecl
) = 1;
10006 DECL_RESULT (decl1
) = resdecl
;
10008 c_apply_type_quals_to_decl (cp_type_quals (restype
), resdecl
);
10011 /* Initialize RTL machinery. We cannot do this until
10012 CURRENT_FUNCTION_DECL and DECL_RESULT are set up. We do this
10013 even when processing a template; this is how we get
10014 CFUN set up, and our per-function variables initialized.
10015 FIXME factor out the non-RTL stuff. */
10016 bl
= current_binding_level
;
10017 allocate_struct_function (decl1
);
10018 current_binding_level
= bl
;
10020 /* Even though we're inside a function body, we still don't want to
10021 call expand_expr to calculate the size of a variable-sized array.
10022 We haven't necessarily assigned RTL to all variables yet, so it's
10023 not safe to try to expand expressions involving them. */
10024 cfun
->x_dont_save_pending_sizes_p
= 1;
10026 /* Start the statement-tree, start the tree now. */
10027 DECL_SAVED_TREE (decl1
) = push_stmt_list ();
10029 /* Let the user know we're compiling this function. */
10030 announce_function (decl1
);
10032 /* Record the decl so that the function name is defined.
10033 If we already have a decl for this name, and it is a FUNCTION_DECL,
10034 use the old decl. */
10035 if (!processing_template_decl
&& !(flags
& SF_PRE_PARSED
))
10037 /* A specialization is not used to guide overload resolution. */
10038 if (!DECL_FUNCTION_MEMBER_P (decl1
)
10039 && !(DECL_USE_TEMPLATE (decl1
) &&
10040 PRIMARY_TEMPLATE_P (DECL_TI_TEMPLATE (decl1
))))
10042 tree olddecl
= pushdecl (decl1
);
10044 if (olddecl
== error_mark_node
)
10045 /* If something went wrong when registering the declaration,
10046 use DECL1; we have to have a FUNCTION_DECL to use when
10047 parsing the body of the function. */
10050 /* Otherwise, OLDDECL is either a previous declaration of
10051 the same function or DECL1 itself. */
10056 /* We need to set the DECL_CONTEXT. */
10057 if (!DECL_CONTEXT (decl1
) && DECL_TEMPLATE_INFO (decl1
))
10058 DECL_CONTEXT (decl1
) = DECL_CONTEXT (DECL_TI_TEMPLATE (decl1
));
10059 /* And make sure we have enough default args. */
10060 check_default_args (decl1
);
10062 fntype
= TREE_TYPE (decl1
);
10065 /* Determine the ELF visibility attribute for the function. We must
10066 not do this before calling "pushdecl", as we must allow
10067 "duplicate_decls" to merge any attributes appropriately. */
10068 if (!DECL_CLONED_FUNCTION_P (decl1
))
10069 determine_visibility (decl1
);
10071 /* Reset these in case the call to pushdecl changed them. */
10072 current_function_decl
= decl1
;
10073 cfun
->decl
= decl1
;
10075 /* If we are (erroneously) defining a function that we have already
10076 defined before, wipe out what we knew before. */
10077 if (!DECL_PENDING_INLINE_P (decl1
))
10078 DECL_SAVED_FUNCTION_DATA (decl1
) = NULL
;
10080 if (ctype
&& !doing_friend
&& !DECL_STATIC_FUNCTION_P (decl1
))
10082 /* We know that this was set up by `grokclassfn'. We do not
10083 wait until `store_parm_decls', since evil parse errors may
10084 never get us to that point. Here we keep the consistency
10085 between `current_class_type' and `current_class_ptr'. */
10086 tree t
= DECL_ARGUMENTS (decl1
);
10088 gcc_assert (t
!= NULL_TREE
&& TREE_CODE (t
) == PARM_DECL
);
10089 gcc_assert (TREE_CODE (TREE_TYPE (t
)) == POINTER_TYPE
);
10091 cp_function_chain
->x_current_class_ref
10092 = build_indirect_ref (t
, NULL
);
10093 cp_function_chain
->x_current_class_ptr
= t
;
10095 /* Constructors and destructors need to know whether they're "in
10096 charge" of initializing virtual base classes. */
10097 t
= TREE_CHAIN (t
);
10098 if (DECL_HAS_IN_CHARGE_PARM_P (decl1
))
10100 current_in_charge_parm
= t
;
10101 t
= TREE_CHAIN (t
);
10103 if (DECL_HAS_VTT_PARM_P (decl1
))
10105 gcc_assert (DECL_NAME (t
) == vtt_parm_identifier
);
10106 current_vtt_parm
= t
;
10110 if (DECL_INTERFACE_KNOWN (decl1
))
10112 tree ctx
= decl_function_context (decl1
);
10114 if (DECL_NOT_REALLY_EXTERN (decl1
))
10115 DECL_EXTERNAL (decl1
) = 0;
10117 if (ctx
!= NULL_TREE
&& DECL_DECLARED_INLINE_P (ctx
)
10118 && TREE_PUBLIC (ctx
))
10119 /* This is a function in a local class in an extern inline
10121 comdat_linkage (decl1
);
10123 /* If this function belongs to an interface, it is public.
10124 If it belongs to someone else's interface, it is also external.
10125 This only affects inlines and template instantiations. */
10126 else if (finfo
->interface_unknown
== 0
10127 && ! DECL_TEMPLATE_INSTANTIATION (decl1
))
10129 if (DECL_DECLARED_INLINE_P (decl1
)
10130 || DECL_TEMPLATE_INSTANTIATION (decl1
)
10131 || processing_template_decl
)
10133 DECL_EXTERNAL (decl1
)
10134 = (finfo
->interface_only
10135 || (DECL_DECLARED_INLINE_P (decl1
)
10136 && ! flag_implement_inlines
10137 && !DECL_VINDEX (decl1
)));
10139 /* For WIN32 we also want to put these in linkonce sections. */
10140 maybe_make_one_only (decl1
);
10143 DECL_EXTERNAL (decl1
) = 0;
10144 DECL_NOT_REALLY_EXTERN (decl1
) = 0;
10145 DECL_INTERFACE_KNOWN (decl1
) = 1;
10146 /* If this function is in an interface implemented in this file,
10147 make sure that the backend knows to emit this function
10149 if (!DECL_EXTERNAL (decl1
))
10150 mark_needed (decl1
);
10152 else if (finfo
->interface_unknown
&& finfo
->interface_only
10153 && ! DECL_TEMPLATE_INSTANTIATION (decl1
))
10155 /* If MULTIPLE_SYMBOL_SPACES is defined and we saw a #pragma
10156 interface, we will have both finfo->interface_unknown and
10157 finfo->interface_only set. In that case, we don't want to
10158 use the normal heuristics because someone will supply a
10159 #pragma implementation elsewhere, and deducing it here would
10160 produce a conflict. */
10161 comdat_linkage (decl1
);
10162 DECL_EXTERNAL (decl1
) = 0;
10163 DECL_INTERFACE_KNOWN (decl1
) = 1;
10164 DECL_DEFER_OUTPUT (decl1
) = 1;
10168 /* This is a definition, not a reference.
10169 So clear DECL_EXTERNAL. */
10170 DECL_EXTERNAL (decl1
) = 0;
10172 if ((DECL_DECLARED_INLINE_P (decl1
)
10173 || DECL_TEMPLATE_INSTANTIATION (decl1
))
10174 && ! DECL_INTERFACE_KNOWN (decl1
)
10175 /* Don't try to defer nested functions for now. */
10176 && ! decl_function_context (decl1
))
10177 DECL_DEFER_OUTPUT (decl1
) = 1;
10179 DECL_INTERFACE_KNOWN (decl1
) = 1;
10182 begin_scope (sk_function_parms
, decl1
);
10186 if (DECL_DESTRUCTOR_P (decl1
)
10187 || (DECL_CONSTRUCTOR_P (decl1
)
10188 && targetm
.cxx
.cdtor_returns_this ()))
10190 cdtor_label
= build_decl (LABEL_DECL
, NULL_TREE
, NULL_TREE
);
10191 DECL_CONTEXT (cdtor_label
) = current_function_decl
;
10194 start_fname_decls ();
10196 store_parm_decls (current_function_parms
);
10200 /* Like start_preparsed_function, except that instead of a
10201 FUNCTION_DECL, this function takes DECLSPECS and DECLARATOR.
10203 Returns 1 on success. If the DECLARATOR is not suitable for a function
10204 (it defines a datum instead), we return 0, which tells
10205 yyparse to report a parse error. */
10208 start_function (cp_decl_specifier_seq
*declspecs
,
10209 const cp_declarator
*declarator
,
10214 if (have_extern_spec
)
10216 declspecs
->storage_class
= sc_extern
;
10217 /* This should only be done once on the outermost decl. */
10218 have_extern_spec
= false;
10221 decl1
= grokdeclarator (declarator
, declspecs
, FUNCDEF
, 1, &attrs
);
10222 /* If the declarator is not suitable for a function definition,
10223 cause a syntax error. */
10224 if (decl1
== NULL_TREE
|| TREE_CODE (decl1
) != FUNCTION_DECL
)
10227 /* If #pragma weak was used, mark the decl weak now. */
10228 if (global_scope_p (current_binding_level
))
10229 maybe_apply_pragma_weak (decl1
);
10231 if (DECL_MAIN_P (decl1
))
10232 /* main must return int. grokfndecl should have corrected it
10233 (and issued a diagnostic) if the user got it wrong. */
10234 gcc_assert (same_type_p (TREE_TYPE (TREE_TYPE (decl1
)),
10235 integer_type_node
));
10237 start_preparsed_function (decl1
, attrs
, /*flags=*/SF_DEFAULT
);
10242 /* Store the parameter declarations into the current function declaration.
10243 This is called after parsing the parameter declarations, before
10244 digesting the body of the function.
10246 Also install to binding contour return value identifier, if any. */
10249 store_parm_decls (tree current_function_parms
)
10251 tree fndecl
= current_function_decl
;
10254 /* This is a chain of any other decls that came in among the parm
10255 declarations. If a parm is declared with enum {foo, bar} x;
10256 then CONST_DECLs for foo and bar are put here. */
10257 tree nonparms
= NULL_TREE
;
10259 if (current_function_parms
)
10261 /* This case is when the function was defined with an ANSI prototype.
10262 The parms already have decls, so we need not do anything here
10263 except record them as in effect
10264 and complain if any redundant old-style parm decls were written. */
10266 tree specparms
= current_function_parms
;
10269 /* Must clear this because it might contain TYPE_DECLs declared
10271 current_binding_level
->names
= NULL
;
10273 /* If we're doing semantic analysis, then we'll call pushdecl
10274 for each of these. We must do them in reverse order so that
10275 they end in the correct forward order. */
10276 specparms
= nreverse (specparms
);
10278 for (parm
= specparms
; parm
; parm
= next
)
10280 next
= TREE_CHAIN (parm
);
10281 if (TREE_CODE (parm
) == PARM_DECL
)
10283 if (DECL_NAME (parm
) == NULL_TREE
10284 || TREE_CODE (parm
) != VOID_TYPE
)
10287 error ("parameter %qD declared void", parm
);
10291 /* If we find an enum constant or a type tag,
10292 put it aside for the moment. */
10293 TREE_CHAIN (parm
) = NULL_TREE
;
10294 nonparms
= chainon (nonparms
, parm
);
10298 /* Get the decls in their original chain order and record in the
10299 function. This is all and only the PARM_DECLs that were
10300 pushed into scope by the loop above. */
10301 DECL_ARGUMENTS (fndecl
) = getdecls ();
10304 DECL_ARGUMENTS (fndecl
) = NULL_TREE
;
10306 /* Now store the final chain of decls for the arguments
10307 as the decl-chain of the current lexical scope.
10308 Put the enumerators in as well, at the front so that
10309 DECL_ARGUMENTS is not modified. */
10310 current_binding_level
->names
= chainon (nonparms
, DECL_ARGUMENTS (fndecl
));
10312 /* For a cloned function, we've already got all the code we need;
10313 there's no need to add any extra bits. */
10314 if (!DECL_CLONED_FUNCTION_P (fndecl
))
10316 /* Do the starting of the exception specifications, if we have any. */
10317 if (flag_exceptions
&& !processing_template_decl
10318 && flag_enforce_eh_specs
10319 && TYPE_RAISES_EXCEPTIONS (TREE_TYPE (current_function_decl
)))
10320 current_eh_spec_block
= begin_eh_spec_block ();
10325 /* We have finished doing semantic analysis on DECL, but have not yet
10326 generated RTL for its body. Save away our current state, so that
10327 when we want to generate RTL later we know what to do. */
10330 save_function_data (tree decl
)
10332 struct language_function
*f
;
10334 /* Save the language-specific per-function data so that we can
10335 get it back when we really expand this function. */
10336 gcc_assert (!DECL_PENDING_INLINE_P (decl
));
10339 f
= GGC_NEW (struct language_function
);
10340 memcpy (f
, cp_function_chain
, sizeof (struct language_function
));
10341 DECL_SAVED_FUNCTION_DATA (decl
) = f
;
10343 /* Clear out the bits we don't need. */
10344 f
->base
.x_stmt_tree
.x_cur_stmt_list
= NULL_TREE
;
10345 f
->x_named_label_uses
= NULL
;
10346 f
->bindings
= NULL
;
10347 f
->x_local_names
= NULL
;
10351 /* Set the return value of the constructor (if present). */
10354 finish_constructor_body (void)
10359 if (targetm
.cxx
.cdtor_returns_this ())
10361 /* Any return from a constructor will end up here. */
10362 add_stmt (build_stmt (LABEL_EXPR
, cdtor_label
));
10364 val
= DECL_ARGUMENTS (current_function_decl
);
10365 val
= build2 (MODIFY_EXPR
, TREE_TYPE (val
),
10366 DECL_RESULT (current_function_decl
), val
);
10367 /* Return the address of the object. */
10368 exprstmt
= build_stmt (RETURN_EXPR
, val
);
10369 add_stmt (exprstmt
);
10373 /* Do all the processing for the beginning of a destructor; set up the
10374 vtable pointers and cleanups for bases and members. */
10377 begin_destructor_body (void)
10380 tree compound_stmt
;
10382 /* If the dtor is empty, and we know there is not any possible
10383 way we could use any vtable entries, before they are possibly
10384 set by a base class dtor, we don't have to setup the vtables,
10385 as we know that any base class dtor will set up any vtables
10386 it needs. We avoid MI, because one base class dtor can do a
10387 virtual dispatch to an overridden function that would need to
10388 have a non-related vtable set up, we cannot avoid setting up
10389 vtables in that case. We could change this to see if there
10390 is just one vtable.
10392 ??? In the destructor for a class, the vtables are set
10393 appropriately for that class. There will be no non-related
10394 vtables. jason 2001-12-11. */
10395 if_stmt
= begin_if_stmt ();
10397 /* If it is not safe to avoid setting up the vtables, then
10398 someone will change the condition to be boolean_true_node.
10399 (Actually, for now, we do not have code to set the condition
10400 appropriately, so we just assume that we always need to
10401 initialize the vtables.) */
10402 finish_if_stmt_cond (boolean_true_node
, if_stmt
);
10404 compound_stmt
= begin_compound_stmt (0);
10406 /* Make all virtual function table pointers in non-virtual base
10407 classes point to CURRENT_CLASS_TYPE's virtual function
10409 initialize_vtbl_ptrs (current_class_ptr
);
10411 finish_compound_stmt (compound_stmt
);
10412 finish_then_clause (if_stmt
);
10413 finish_if_stmt (if_stmt
);
10415 /* And insert cleanups for our bases and members so that they
10416 will be properly destroyed if we throw. */
10417 push_base_cleanups ();
10420 /* At the end of every destructor we generate code to delete the object if
10421 necessary. Do that now. */
10424 finish_destructor_body (void)
10428 /* Any return from a destructor will end up here; that way all base
10429 and member cleanups will be run when the function returns. */
10430 add_stmt (build_stmt (LABEL_EXPR
, cdtor_label
));
10432 /* In a virtual destructor, we must call delete. */
10433 if (DECL_VIRTUAL_P (current_function_decl
))
10436 tree virtual_size
= cxx_sizeof (current_class_type
);
10440 At the point of definition of a virtual destructor (including
10441 an implicit definition), non-placement operator delete shall
10442 be looked up in the scope of the destructor's class and if
10443 found shall be accessible and unambiguous. */
10444 exprstmt
= build_op_delete_call
10445 (DELETE_EXPR
, current_class_ptr
, virtual_size
,
10446 /*global_p=*/false, NULL_TREE
);
10448 if_stmt
= begin_if_stmt ();
10449 finish_if_stmt_cond (build2 (BIT_AND_EXPR
, integer_type_node
,
10450 current_in_charge_parm
,
10453 finish_expr_stmt (exprstmt
);
10454 finish_then_clause (if_stmt
);
10455 finish_if_stmt (if_stmt
);
10458 if (targetm
.cxx
.cdtor_returns_this ())
10462 val
= DECL_ARGUMENTS (current_function_decl
);
10463 val
= build2 (MODIFY_EXPR
, TREE_TYPE (val
),
10464 DECL_RESULT (current_function_decl
), val
);
10465 /* Return the address of the object. */
10466 exprstmt
= build_stmt (RETURN_EXPR
, val
);
10467 add_stmt (exprstmt
);
10471 /* Do the necessary processing for the beginning of a function body, which
10472 in this case includes member-initializers, but not the catch clauses of
10473 a function-try-block. Currently, this means opening a binding level
10474 for the member-initializers (in a ctor) and member cleanups (in a dtor).
10475 In other functions, this isn't necessary, but it doesn't hurt. */
10478 begin_function_body (void)
10482 if (processing_template_decl
)
10483 /* Do nothing now. */;
10485 /* Always keep the BLOCK node associated with the outermost pair of
10486 curly braces of a function. These are needed for correct
10487 operation of dwarfout.c. */
10488 keep_next_level (true);
10490 stmt
= begin_compound_stmt (BCS_FN_BODY
);
10492 if (processing_template_decl
)
10493 /* Do nothing now. */;
10494 else if (DECL_DESTRUCTOR_P (current_function_decl
))
10495 begin_destructor_body ();
10500 /* Do the processing for the end of a function body. Currently, this means
10501 closing out the cleanups for fully-constructed bases and members, and in
10502 the case of the destructor, deleting the object if desired. Again, this
10503 is only meaningful for [cd]tors, since they are the only functions where
10504 there is a significant distinction between the main body and any
10505 function catch clauses. Handling, say, main() return semantics here
10506 would be wrong, as flowing off the end of a function catch clause for
10507 main() would also need to return 0. */
10510 finish_function_body (tree compstmt
)
10512 /* Close the block. */
10513 finish_compound_stmt (compstmt
);
10515 if (processing_template_decl
)
10516 /* Do nothing now. */;
10517 else if (DECL_CONSTRUCTOR_P (current_function_decl
))
10518 finish_constructor_body ();
10519 else if (DECL_DESTRUCTOR_P (current_function_decl
))
10520 finish_destructor_body ();
10523 /* Finish up a function declaration and compile that function
10524 all the way to assembler language output. The free the storage
10525 for the function definition.
10527 FLAGS is a bitwise or of the following values:
10529 We just finished processing the body of an in-class inline
10530 function definition. (This processing will have taken place
10531 after the class definition is complete.) */
10534 finish_function (int flags
)
10536 tree fndecl
= current_function_decl
;
10537 tree fntype
, ctype
= NULL_TREE
;
10538 int inclass_inline
= (flags
& 2) != 0;
10541 /* When we get some parse errors, we can end up without a
10542 current_function_decl, so cope. */
10543 if (fndecl
== NULL_TREE
)
10544 return error_mark_node
;
10546 if (DECL_NONSTATIC_MEMBER_FUNCTION_P (fndecl
)
10547 && DECL_VIRTUAL_P (fndecl
)
10548 && !processing_template_decl
)
10550 tree fnclass
= DECL_CONTEXT (fndecl
);
10551 if (fndecl
== CLASSTYPE_KEY_METHOD (fnclass
))
10552 keyed_classes
= tree_cons (NULL_TREE
, fnclass
, keyed_classes
);
10555 nested
= function_depth
> 1;
10556 fntype
= TREE_TYPE (fndecl
);
10558 /* TREE_READONLY (fndecl) = 1;
10559 This caused &foo to be of type ptr-to-const-function
10560 which then got a warning when stored in a ptr-to-function variable. */
10562 gcc_assert (building_stmt_tree ());
10564 /* For a cloned function, we've already got all the code we need;
10565 there's no need to add any extra bits. */
10566 if (!DECL_CLONED_FUNCTION_P (fndecl
))
10568 if (DECL_MAIN_P (current_function_decl
))
10570 /* Make it so that `main' always returns 0 by default. */
10572 finish_return_stmt (integer_one_node
);
10574 finish_return_stmt (integer_zero_node
);
10578 /* Finish dealing with exception specifiers. */
10579 if (flag_exceptions
&& !processing_template_decl
10580 && flag_enforce_eh_specs
10581 && TYPE_RAISES_EXCEPTIONS (TREE_TYPE (current_function_decl
)))
10582 finish_eh_spec_block (TYPE_RAISES_EXCEPTIONS
10583 (TREE_TYPE (current_function_decl
)),
10584 current_eh_spec_block
);
10587 /* If we're saving up tree structure, tie off the function now. */
10588 DECL_SAVED_TREE (fndecl
) = pop_stmt_list (DECL_SAVED_TREE (fndecl
));
10590 finish_fname_decls ();
10592 /* If this function can't throw any exceptions, remember that. */
10593 if (!processing_template_decl
10594 && !cp_function_chain
->can_throw
10595 && !flag_non_call_exceptions
)
10596 TREE_NOTHROW (fndecl
) = 1;
10598 /* This must come after expand_function_end because cleanups might
10599 have declarations (from inline functions) that need to go into
10600 this function's blocks. */
10602 /* If the current binding level isn't the outermost binding level
10603 for this function, either there is a bug, or we have experienced
10604 syntax errors and the statement tree is malformed. */
10605 if (current_binding_level
->kind
!= sk_function_parms
)
10607 /* Make sure we have already experienced errors. */
10608 gcc_assert (errorcount
);
10610 /* Throw away the broken statement tree and extra binding
10612 DECL_SAVED_TREE (fndecl
) = alloc_stmt_list ();
10614 while (current_binding_level
->kind
!= sk_function_parms
)
10616 if (current_binding_level
->kind
== sk_class
)
10617 pop_nested_class ();
10619 poplevel (0, 0, 0);
10622 poplevel (1, 0, 1);
10624 /* Statements should always be full-expressions at the outermost set
10625 of curly braces for a function. */
10626 gcc_assert (stmts_are_full_exprs_p ());
10628 /* Set up the named return value optimization, if we can. Candidate
10629 variables are selected in check_return_value. */
10630 if (current_function_return_value
)
10632 tree r
= current_function_return_value
;
10635 if (r
!= error_mark_node
10636 /* This is only worth doing for fns that return in memory--and
10637 simpler, since we don't have to worry about promoted modes. */
10638 && aggregate_value_p (TREE_TYPE (TREE_TYPE (fndecl
)), fndecl
)
10639 /* Only allow this for variables declared in the outer scope of
10640 the function so we know that their lifetime always ends with a
10641 return; see g++.dg/opt/nrv6.C. We could be more flexible if
10642 we were to do this optimization in tree-ssa. */
10643 && (outer
= BLOCK_SUBBLOCKS (DECL_INITIAL (fndecl
)))
10644 /* Skip the artificial function body block. */
10645 && (outer
= BLOCK_SUBBLOCKS (outer
))
10646 && chain_member (r
, BLOCK_VARS (outer
)))
10647 finalize_nrv (&DECL_SAVED_TREE (fndecl
), r
, DECL_RESULT (fndecl
));
10649 current_function_return_value
= NULL_TREE
;
10652 /* Remember that we were in class scope. */
10653 if (current_class_name
)
10654 ctype
= current_class_type
;
10656 /* Must mark the RESULT_DECL as being in this function. */
10657 DECL_CONTEXT (DECL_RESULT (fndecl
)) = fndecl
;
10659 /* Set the BLOCK_SUPERCONTEXT of the outermost function scope to point
10660 to the FUNCTION_DECL node itself. */
10661 BLOCK_SUPERCONTEXT (DECL_INITIAL (fndecl
)) = fndecl
;
10663 /* Save away current state, if appropriate. */
10664 if (!processing_template_decl
)
10665 save_function_data (fndecl
);
10667 /* Complain if there's just no return statement. */
10668 if (warn_return_type
10669 && TREE_CODE (TREE_TYPE (fntype
)) != VOID_TYPE
10670 && !dependent_type_p (TREE_TYPE (fntype
))
10671 && !current_function_returns_value
&& !current_function_returns_null
10672 /* Don't complain if we abort or throw. */
10673 && !current_function_returns_abnormally
10674 && !DECL_NAME (DECL_RESULT (fndecl
))
10675 /* Normally, with -Wreturn-type, flow will complain. Unless we're an
10676 inline function, as we might never be compiled separately. */
10677 && (DECL_INLINE (fndecl
) || processing_template_decl
)
10678 /* Structor return values (if any) are set by the compiler. */
10679 && !DECL_CONSTRUCTOR_P (fndecl
)
10680 && !DECL_DESTRUCTOR_P (fndecl
))
10681 warning ("no return statement in function returning non-void");
10683 /* Store the end of the function, so that we get good line number
10684 info for the epilogue. */
10685 cfun
->function_end_locus
= input_location
;
10687 /* Genericize before inlining. */
10688 if (!processing_template_decl
)
10690 struct language_function
*f
= DECL_SAVED_FUNCTION_DATA (fndecl
);
10691 cp_genericize (fndecl
);
10692 /* Clear out the bits we don't need. */
10693 f
->x_current_class_ptr
= NULL
;
10694 f
->x_current_class_ref
= NULL
;
10695 f
->x_eh_spec_block
= NULL
;
10696 f
->x_in_charge_parm
= NULL
;
10697 f
->x_vtt_parm
= NULL
;
10698 f
->x_return_value
= NULL
;
10699 f
->bindings
= NULL
;
10701 /* Handle attribute((warn_unused_result)). Relies on gimple input. */
10702 c_warn_unused_result (&DECL_SAVED_TREE (fndecl
));
10704 /* Clear out the bits we don't need. */
10705 local_names
= NULL
;
10706 named_label_uses
= NULL
;
10708 /* We're leaving the context of this function, so zap cfun. It's still in
10709 DECL_STRUCT_FUNCTION, and we'll restore it in tree_rest_of_compilation. */
10711 current_function_decl
= NULL
;
10713 /* If this is an in-class inline definition, we may have to pop the
10714 bindings for the template parameters that we added in
10715 maybe_begin_member_template_processing when start_function was
10717 if (inclass_inline
)
10718 maybe_end_member_template_processing ();
10720 /* Leave the scope of the class. */
10722 pop_nested_class ();
10728 /* Let the error reporting routines know that we're outside a
10729 function. For a nested function, this value is used in
10730 cxx_pop_function_context and then reset via pop_function_context. */
10731 current_function_decl
= NULL_TREE
;
10736 /* Create the FUNCTION_DECL for a function definition.
10737 DECLSPECS and DECLARATOR are the parts of the declaration;
10738 they describe the return type and the name of the function,
10739 but twisted together in a fashion that parallels the syntax of C.
10741 This function creates a binding context for the function body
10742 as well as setting up the FUNCTION_DECL in current_function_decl.
10744 Returns a FUNCTION_DECL on success.
10746 If the DECLARATOR is not suitable for a function (it defines a datum
10747 instead), we return 0, which tells yyparse to report a parse error.
10749 May return void_type_node indicating that this method is actually
10750 a friend. See grokfield for more details.
10752 Came here with a `.pushlevel' .
10754 DO NOT MAKE ANY CHANGES TO THIS CODE WITHOUT MAKING CORRESPONDING
10755 CHANGES TO CODE IN `grokfield'. */
10758 start_method (cp_decl_specifier_seq
*declspecs
,
10759 const cp_declarator
*declarator
, tree attrlist
)
10761 tree fndecl
= grokdeclarator (declarator
, declspecs
, MEMFUNCDEF
, 0,
10764 if (fndecl
== error_mark_node
)
10765 return error_mark_node
;
10767 if (fndecl
== NULL
|| TREE_CODE (fndecl
) != FUNCTION_DECL
)
10769 error ("invalid member function declaration");
10770 return error_mark_node
;
10774 cplus_decl_attributes (&fndecl
, attrlist
, 0);
10776 /* Pass friends other than inline friend functions back. */
10777 if (fndecl
== void_type_node
)
10780 if (DECL_IN_AGGR_P (fndecl
))
10782 if (DECL_CONTEXT (fndecl
)
10783 && TREE_CODE( DECL_CONTEXT (fndecl
)) != NAMESPACE_DECL
)
10784 error ("%qD is already defined in class %qT", fndecl
,
10785 DECL_CONTEXT (fndecl
));
10786 return void_type_node
;
10789 check_template_shadow (fndecl
);
10791 DECL_DECLARED_INLINE_P (fndecl
) = 1;
10792 if (flag_default_inline
)
10793 DECL_INLINE (fndecl
) = 1;
10795 /* We process method specializations in finish_struct_1. */
10796 if (processing_template_decl
&& !DECL_TEMPLATE_SPECIALIZATION (fndecl
))
10798 fndecl
= push_template_decl (fndecl
);
10799 if (fndecl
== error_mark_node
)
10803 if (! DECL_FRIEND_P (fndecl
))
10805 if (TREE_CHAIN (fndecl
))
10807 fndecl
= copy_node (fndecl
);
10808 TREE_CHAIN (fndecl
) = NULL_TREE
;
10810 grok_special_member_properties (fndecl
);
10813 cp_finish_decl (fndecl
, NULL_TREE
, NULL_TREE
, 0);
10815 /* Make a place for the parms. */
10816 begin_scope (sk_function_parms
, fndecl
);
10818 DECL_IN_AGGR_P (fndecl
) = 1;
10822 /* Go through the motions of finishing a function definition.
10823 We don't compile this method until after the whole class has
10826 FINISH_METHOD must return something that looks as though it
10827 came from GROKFIELD (since we are defining a method, after all).
10829 This is called after parsing the body of the function definition.
10830 STMTS is the chain of statements that makes up the function body.
10832 DECL is the ..._DECL that `start_method' provided. */
10835 finish_method (tree decl
)
10837 tree fndecl
= decl
;
10842 if (decl
== void_type_node
)
10845 old_initial
= DECL_INITIAL (fndecl
);
10847 /* Undo the level for the parms (from start_method).
10848 This is like poplevel, but it causes nothing to be
10849 saved. Saving information here confuses symbol-table
10850 output routines. Besides, this information will
10851 be correctly output when this method is actually
10854 /* Clear out the meanings of the local variables of this level;
10855 also record in each decl which block it belongs to. */
10857 for (link
= current_binding_level
->names
; link
; link
= TREE_CHAIN (link
))
10859 if (DECL_NAME (link
) != NULL_TREE
)
10860 pop_binding (DECL_NAME (link
), link
);
10861 gcc_assert (TREE_CODE (link
) != FUNCTION_DECL
);
10862 DECL_CONTEXT (link
) = NULL_TREE
;
10865 poplevel (0, 0, 0);
10867 DECL_INITIAL (fndecl
) = old_initial
;
10869 /* We used to check if the context of FNDECL was different from
10870 current_class_type as another way to get inside here. This didn't work
10871 for String.cc in libg++. */
10872 if (DECL_FRIEND_P (fndecl
))
10874 VEC_safe_push (tree
, CLASSTYPE_INLINE_FRIENDS (current_class_type
),
10876 decl
= void_type_node
;
10883 /* VAR is a VAR_DECL. If its type is incomplete, remember VAR so that
10884 we can lay it out later, when and if its type becomes complete. */
10887 maybe_register_incomplete_var (tree var
)
10889 gcc_assert (TREE_CODE (var
) == VAR_DECL
);
10891 /* Keep track of variables with incomplete types. */
10892 if (!processing_template_decl
&& TREE_TYPE (var
) != error_mark_node
10893 && DECL_EXTERNAL (var
))
10895 tree inner_type
= TREE_TYPE (var
);
10897 while (TREE_CODE (inner_type
) == ARRAY_TYPE
)
10898 inner_type
= TREE_TYPE (inner_type
);
10899 inner_type
= TYPE_MAIN_VARIANT (inner_type
);
10901 if ((!COMPLETE_TYPE_P (inner_type
) && CLASS_TYPE_P (inner_type
))
10902 /* RTTI TD entries are created while defining the type_info. */
10903 || (TYPE_LANG_SPECIFIC (inner_type
)
10904 && TYPE_BEING_DEFINED (inner_type
)))
10905 incomplete_vars
= tree_cons (inner_type
, var
, incomplete_vars
);
10909 /* Called when a class type (given by TYPE) is defined. If there are
10910 any existing VAR_DECLs whose type hsa been completed by this
10911 declaration, update them now. */
10914 complete_vars (tree type
)
10916 tree
*list
= &incomplete_vars
;
10918 gcc_assert (CLASS_TYPE_P (type
));
10921 if (same_type_p (type
, TREE_PURPOSE (*list
)))
10923 tree var
= TREE_VALUE (*list
);
10924 /* Complete the type of the variable. The VAR_DECL itself
10925 will be laid out in expand_expr. */
10926 complete_type (TREE_TYPE (var
));
10927 /* Remove this entry from the list. */
10928 *list
= TREE_CHAIN (*list
);
10931 list
= &TREE_CHAIN (*list
);
10934 /* Check for pending declarations which may have abstract type. */
10935 complete_type_check_abstract (type
);
10938 /* If DECL is of a type which needs a cleanup, build that cleanup
10942 cxx_maybe_build_cleanup (tree decl
)
10944 tree type
= TREE_TYPE (decl
);
10946 if (type
!= error_mark_node
&& TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type
))
10948 int flags
= LOOKUP_NORMAL
|LOOKUP_DESTRUCTOR
;
10950 bool has_vbases
= (TREE_CODE (type
) == RECORD_TYPE
10951 && CLASSTYPE_VBASECLASSES (type
));
10953 if (TREE_CODE (type
) == ARRAY_TYPE
)
10957 cxx_mark_addressable (decl
);
10958 rval
= build_unary_op (ADDR_EXPR
, decl
, 0);
10961 /* Optimize for space over speed here. */
10962 if (!has_vbases
|| flag_expensive_optimizations
)
10963 flags
|= LOOKUP_NONVIRTUAL
;
10965 rval
= build_delete (TREE_TYPE (rval
), rval
,
10966 sfk_complete_destructor
, flags
, 0);
10968 if (has_vbases
&& !TYPE_HAS_DESTRUCTOR (type
))
10969 rval
= build_compound_expr (rval
, build_vbase_delete (type
, decl
));
10976 /* When a stmt has been parsed, this function is called. */
10983 /* DECL was originally constructed as a non-static member function,
10984 but turned out to be static. Update it accordingly. */
10987 revert_static_member_fn (tree decl
)
10990 tree function
= TREE_TYPE (decl
);
10991 tree args
= TYPE_ARG_TYPES (function
);
10993 if (cp_type_quals (TREE_TYPE (TREE_VALUE (args
)))
10994 != TYPE_UNQUALIFIED
)
10995 error ("static member function %q#D declared with type qualifiers", decl
);
10997 args
= TREE_CHAIN (args
);
10998 tmp
= build_function_type (TREE_TYPE (function
), args
);
10999 tmp
= build_qualified_type (tmp
, cp_type_quals (function
));
11000 tmp
= build_exception_variant (tmp
,
11001 TYPE_RAISES_EXCEPTIONS (function
));
11002 TREE_TYPE (decl
) = tmp
;
11003 if (DECL_ARGUMENTS (decl
))
11004 DECL_ARGUMENTS (decl
) = TREE_CHAIN (DECL_ARGUMENTS (decl
));
11005 DECL_STATIC_FUNCTION_P (decl
) = 1;
11008 /* Initialize the variables used during compilation of a C++
11012 cxx_push_function_context (struct function
* f
)
11014 struct language_function
*p
= GGC_CNEW (struct language_function
);
11017 /* Whenever we start a new function, we destroy temporaries in the
11019 current_stmt_tree ()->stmts_are_full_exprs_p
= 1;
11025 if (DECL_SAVED_FUNCTION_DATA (fn
))
11027 /* If we already parsed this function, and we're just expanding it
11028 now, restore saved state. */
11029 *cp_function_chain
= *DECL_SAVED_FUNCTION_DATA (fn
);
11031 /* We don't need the saved data anymore. Unless this is an inline
11032 function; we need the named return value info for
11033 declare_return_variable. */
11034 if (! DECL_INLINE (fn
))
11035 DECL_SAVED_FUNCTION_DATA (fn
) = NULL
;
11040 /* Free the language-specific parts of F, now that we've finished
11041 compiling the function. */
11044 cxx_pop_function_context (struct function
* f
)
11049 /* Return which tree structure is used by T, or TS_CP_GENERIC if T is
11050 one of the language-independent trees. */
11052 enum cp_tree_node_structure_enum
11053 cp_tree_node_structure (union lang_tree_node
* t
)
11055 switch (TREE_CODE (&t
->generic
))
11057 case DEFAULT_ARG
: return TS_CP_DEFAULT_ARG
;
11058 case IDENTIFIER_NODE
: return TS_CP_IDENTIFIER
;
11059 case OVERLOAD
: return TS_CP_OVERLOAD
;
11060 case TEMPLATE_PARM_INDEX
: return TS_CP_TPI
;
11061 case TINST_LEVEL
: return TS_CP_TINST_LEVEL
;
11062 case PTRMEM_CST
: return TS_CP_PTRMEM
;
11063 case BASELINK
: return TS_CP_BASELINK
;
11064 default: return TS_CP_GENERIC
;
11068 /* Build the void_list_node (void_type_node having been created). */
11070 build_void_list_node (void)
11072 tree t
= build_tree_list (NULL_TREE
, void_type_node
);
11077 cp_missing_noreturn_ok_p (tree decl
)
11079 /* A missing noreturn is ok for the `main' function. */
11080 return DECL_MAIN_P (decl
);
11083 /* Return the COMDAT group into which DECL should be placed. */
11086 cxx_comdat_group (tree decl
)
11090 /* Virtual tables, construction virtual tables, and virtual table
11091 tables all go in a single COMDAT group, named after the primary
11093 if (TREE_CODE (decl
) == VAR_DECL
&& DECL_VTABLE_OR_VTT_P (decl
))
11094 name
= DECL_ASSEMBLER_NAME (CLASSTYPE_VTABLES (DECL_CONTEXT (decl
)));
11095 /* For all other DECLs, the COMDAT group is the mangled name of the
11096 declaration itself. */
11098 name
= DECL_ASSEMBLER_NAME (decl
);
11100 return IDENTIFIER_POINTER (name
);
11103 #include "gt-cp-decl.h"