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 /* Some of these names have a trailing space so that it is
2927 impossible for them to conflict with names written by users. */
2928 { "__ct ", &ctor_identifier
, 1 },
2929 { "__base_ctor ", &base_ctor_identifier
, 1 },
2930 { "__comp_ctor ", &complete_ctor_identifier
, 1 },
2931 { "__dt ", &dtor_identifier
, 1 },
2932 { "__comp_dtor ", &complete_dtor_identifier
, 1 },
2933 { "__base_dtor ", &base_dtor_identifier
, 1 },
2934 { "__deleting_dtor ", &deleting_dtor_identifier
, 1 },
2935 { IN_CHARGE_NAME
, &in_charge_identifier
, 0 },
2936 { "nelts", &nelts_identifier
, 0 },
2937 { THIS_NAME
, &this_identifier
, 0 },
2938 { VTABLE_DELTA_NAME
, &delta_identifier
, 0 },
2939 { VTABLE_PFN_NAME
, &pfn_identifier
, 0 },
2940 { "_vptr", &vptr_identifier
, 0 },
2941 { "__vtt_parm", &vtt_parm_identifier
, 0 },
2942 { "::", &global_scope_name
, 0 },
2943 { "std", &std_identifier
, 0 },
2947 for (pid
= predefined_identifiers
; pid
->name
; ++pid
)
2949 *pid
->node
= get_identifier (pid
->name
);
2950 if (pid
->ctor_or_dtor_p
)
2951 IDENTIFIER_CTOR_OR_DTOR_P (*pid
->node
) = 1;
2955 /* Create the predefined scalar types of C,
2956 and some nodes representing standard constants (0, 1, (void *)0).
2957 Initialize the global binding level.
2958 Make definitions for built-in primitive functions. */
2961 cxx_init_decl_processing (void)
2964 tree void_ftype_ptr
;
2966 build_common_tree_nodes (flag_signed_char
, false);
2968 /* Create all the identifiers we need. */
2969 initialize_predefined_identifiers ();
2971 /* Create the global variables. */
2972 push_to_top_level ();
2974 current_function_decl
= NULL_TREE
;
2975 current_binding_level
= NULL
;
2976 /* Enter the global namespace. */
2977 gcc_assert (global_namespace
== NULL_TREE
);
2978 global_namespace
= build_lang_decl (NAMESPACE_DECL
, global_scope_name
,
2980 begin_scope (sk_namespace
, global_namespace
);
2982 current_lang_name
= NULL_TREE
;
2984 /* Adjust various flags based on command-line settings. */
2985 if (!flag_permissive
)
2986 flag_pedantic_errors
= 1;
2987 if (!flag_no_inline
)
2989 flag_inline_trees
= 1;
2992 if (flag_inline_functions
)
2994 flag_inline_trees
= 2;
2995 flag_inline_functions
= 0;
2998 /* Force minimum function alignment if using the least significant
2999 bit of function pointers to store the virtual bit. */
3000 if (TARGET_PTRMEMFUNC_VBIT_LOCATION
== ptrmemfunc_vbit_in_pfn
3001 && force_align_functions_log
< 1)
3002 force_align_functions_log
= 1;
3005 current_lang_name
= lang_name_c
;
3007 error_mark_list
= build_tree_list (error_mark_node
, error_mark_node
);
3008 TREE_TYPE (error_mark_list
) = error_mark_node
;
3010 /* Create the `std' namespace. */
3011 push_namespace (std_identifier
);
3012 std_node
= current_namespace
;
3015 c_common_nodes_and_builtins ();
3017 java_byte_type_node
= record_builtin_java_type ("__java_byte", 8);
3018 java_short_type_node
= record_builtin_java_type ("__java_short", 16);
3019 java_int_type_node
= record_builtin_java_type ("__java_int", 32);
3020 java_long_type_node
= record_builtin_java_type ("__java_long", 64);
3021 java_float_type_node
= record_builtin_java_type ("__java_float", -32);
3022 java_double_type_node
= record_builtin_java_type ("__java_double", -64);
3023 java_char_type_node
= record_builtin_java_type ("__java_char", -16);
3024 java_boolean_type_node
= record_builtin_java_type ("__java_boolean", -1);
3026 integer_two_node
= build_int_cst (NULL_TREE
, 2);
3027 integer_three_node
= build_int_cst (NULL_TREE
, 3);
3029 record_builtin_type (RID_BOOL
, "bool", boolean_type_node
);
3030 truthvalue_type_node
= boolean_type_node
;
3031 truthvalue_false_node
= boolean_false_node
;
3032 truthvalue_true_node
= boolean_true_node
;
3034 empty_except_spec
= build_tree_list (NULL_TREE
, NULL_TREE
);
3037 record_builtin_type (RID_MAX
, NULL
, string_type_node
);
3040 delta_type_node
= ptrdiff_type_node
;
3041 vtable_index_type
= ptrdiff_type_node
;
3043 vtt_parm_type
= build_pointer_type (const_ptr_type_node
);
3044 void_ftype
= build_function_type (void_type_node
, void_list_node
);
3045 void_ftype_ptr
= build_function_type (void_type_node
,
3046 tree_cons (NULL_TREE
,
3050 = build_exception_variant (void_ftype_ptr
, empty_except_spec
);
3052 /* C++ extensions */
3054 unknown_type_node
= make_node (UNKNOWN_TYPE
);
3055 record_unknown_type (unknown_type_node
, "unknown type");
3057 /* Indirecting an UNKNOWN_TYPE node yields an UNKNOWN_TYPE node. */
3058 TREE_TYPE (unknown_type_node
) = unknown_type_node
;
3060 /* Looking up TYPE_POINTER_TO and TYPE_REFERENCE_TO yield the same
3062 TYPE_POINTER_TO (unknown_type_node
) = unknown_type_node
;
3063 TYPE_REFERENCE_TO (unknown_type_node
) = unknown_type_node
;
3066 /* Make sure we get a unique function type, so we can give
3067 its pointer type a name. (This wins for gdb.) */
3068 tree vfunc_type
= make_node (FUNCTION_TYPE
);
3069 TREE_TYPE (vfunc_type
) = integer_type_node
;
3070 TYPE_ARG_TYPES (vfunc_type
) = NULL_TREE
;
3071 layout_type (vfunc_type
);
3073 vtable_entry_type
= build_pointer_type (vfunc_type
);
3075 record_builtin_type (RID_MAX
, VTBL_PTR_TYPE
, vtable_entry_type
);
3078 = build_cplus_array_type (vtable_entry_type
, NULL_TREE
);
3079 layout_type (vtbl_type_node
);
3080 vtbl_type_node
= build_qualified_type (vtbl_type_node
, TYPE_QUAL_CONST
);
3081 record_builtin_type (RID_MAX
, NULL
, vtbl_type_node
);
3082 vtbl_ptr_type_node
= build_pointer_type (vtable_entry_type
);
3083 layout_type (vtbl_ptr_type_node
);
3084 record_builtin_type (RID_MAX
, NULL
, vtbl_ptr_type_node
);
3086 push_namespace (get_identifier ("__cxxabiv1"));
3087 abi_node
= current_namespace
;
3090 global_type_node
= make_node (LANG_TYPE
);
3091 record_unknown_type (global_type_node
, "global type");
3094 current_lang_name
= lang_name_cplusplus
;
3098 tree bad_alloc_type_node
;
3099 tree bad_alloc_decl
;
3100 tree newtype
, deltype
;
3101 tree ptr_ftype_sizetype
;
3103 push_namespace (std_identifier
);
3104 bad_alloc_id
= get_identifier ("bad_alloc");
3105 bad_alloc_type_node
= make_aggr_type (RECORD_TYPE
);
3106 TYPE_CONTEXT (bad_alloc_type_node
) = current_namespace
;
3108 = create_implicit_typedef (bad_alloc_id
, bad_alloc_type_node
);
3109 DECL_CONTEXT (bad_alloc_decl
) = current_namespace
;
3110 TYPE_STUB_DECL (bad_alloc_type_node
) = bad_alloc_decl
;
3114 = build_function_type (ptr_type_node
,
3115 tree_cons (NULL_TREE
,
3118 newtype
= build_exception_variant
3119 (ptr_ftype_sizetype
, add_exception_specifier
3120 (NULL_TREE
, bad_alloc_type_node
, -1));
3121 deltype
= build_exception_variant (void_ftype_ptr
, empty_except_spec
);
3122 push_cp_library_fn (NEW_EXPR
, newtype
);
3123 push_cp_library_fn (VEC_NEW_EXPR
, newtype
);
3124 global_delete_fndecl
= push_cp_library_fn (DELETE_EXPR
, deltype
);
3125 push_cp_library_fn (VEC_DELETE_EXPR
, deltype
);
3129 = build_library_fn_ptr ("__cxa_pure_virtual", void_ftype
);
3131 /* Perform other language dependent initializations. */
3132 init_class_processing ();
3133 init_rtti_processing ();
3135 if (flag_exceptions
)
3136 init_exception_processing ();
3138 if (! supports_one_only ())
3141 make_fname_decl
= cp_make_fname_decl
;
3142 start_fname_decls ();
3144 /* Show we use EH for cleanups. */
3145 if (flag_exceptions
)
3146 using_eh_for_cleanups ();
3149 /* Generate an initializer for a function naming variable from
3150 NAME. NAME may be NULL, to indicate a dependent name. TYPE_P is
3151 filled in with the type of the init. */
3154 cp_fname_init (const char* name
, tree
*type_p
)
3156 tree domain
= NULL_TREE
;
3158 tree init
= NULL_TREE
;
3163 length
= strlen (name
);
3164 domain
= build_index_type (size_int (length
));
3165 init
= build_string (length
+ 1, name
);
3168 type
= build_qualified_type (char_type_node
, TYPE_QUAL_CONST
);
3169 type
= build_cplus_array_type (type
, domain
);
3174 TREE_TYPE (init
) = type
;
3176 init
= error_mark_node
;
3181 /* Create the VAR_DECL for __FUNCTION__ etc. ID is the name to give the
3182 decl, NAME is the initialization string and TYPE_DEP indicates whether
3183 NAME depended on the type of the function. We make use of that to detect
3184 __PRETTY_FUNCTION__ inside a template fn. This is being done
3185 lazily at the point of first use, so we mustn't push the decl now. */
3188 cp_make_fname_decl (tree id
, int type_dep
)
3190 const char *const name
= (type_dep
&& processing_template_decl
3191 ? NULL
: fname_as_string (type_dep
));
3193 tree init
= cp_fname_init (name
, &type
);
3194 tree decl
= build_decl (VAR_DECL
, id
, type
);
3197 free ((char *) name
);
3199 /* As we're using pushdecl_with_scope, we must set the context. */
3200 DECL_CONTEXT (decl
) = current_function_decl
;
3201 DECL_PRETTY_FUNCTION_P (decl
) = type_dep
;
3203 TREE_STATIC (decl
) = 1;
3204 TREE_READONLY (decl
) = 1;
3205 DECL_ARTIFICIAL (decl
) = 1;
3206 DECL_INITIAL (decl
) = init
;
3208 TREE_USED (decl
) = 1;
3210 if (current_function_decl
)
3212 struct cp_binding_level
*b
= current_binding_level
;
3213 while (b
->level_chain
->kind
!= sk_function_parms
)
3215 pushdecl_with_scope (decl
, b
);
3216 cp_finish_decl (decl
, init
, NULL_TREE
, LOOKUP_ONLYCONVERTING
);
3219 pushdecl_top_level_and_finish (decl
, init
);
3224 /* Make a definition for a builtin function named NAME in the current
3225 namespace, whose data type is TYPE and whose context is CONTEXT.
3226 TYPE should be a function type with argument types.
3228 CLASS and CODE tell later passes how to compile calls to this function.
3229 See tree.h for possible values.
3231 If LIBNAME is nonzero, use that for DECL_ASSEMBLER_NAME,
3232 the name to be called if we can't opencode the function.
3233 If ATTRS is nonzero, use that for the function's attribute
3237 builtin_function_1 (const char* name
,
3240 enum built_in_function code
,
3241 enum built_in_class
class,
3242 const char* libname
,
3245 tree decl
= build_library_fn_1 (get_identifier (name
), ERROR_MARK
, type
);
3246 DECL_BUILT_IN_CLASS (decl
) = class;
3247 DECL_FUNCTION_CODE (decl
) = code
;
3248 DECL_CONTEXT (decl
) = context
;
3252 /* Since `pushdecl' relies on DECL_ASSEMBLER_NAME instead of DECL_NAME,
3253 we cannot change DECL_ASSEMBLER_NAME until we have installed this
3254 function in the namespace. */
3256 SET_DECL_ASSEMBLER_NAME (decl
, get_identifier (libname
));
3258 /* Warn if a function in the namespace for users
3259 is used without an occasion to consider it declared. */
3260 if (name
[0] != '_' || name
[1] != '_')
3261 DECL_ANTICIPATED (decl
) = 1;
3263 /* Possibly apply some default attributes to this built-in function. */
3265 decl_attributes (&decl
, attrs
, ATTR_FLAG_BUILT_IN
);
3267 decl_attributes (&decl
, NULL_TREE
, 0);
3272 /* Entry point for the benefit of c_common_nodes_and_builtins.
3274 Make a definition for a builtin function named NAME and whose data type
3275 is TYPE. TYPE should be a function type with argument types. This
3276 function places the anticipated declaration in the global namespace
3277 and additionally in the std namespace if appropriate.
3279 CLASS and CODE tell later passes how to compile calls to this function.
3280 See tree.h for possible values.
3282 If LIBNAME is nonzero, use that for DECL_ASSEMBLER_NAME,
3283 the name to be called if we can't opencode the function.
3285 If ATTRS is nonzero, use that for the function's attribute
3289 builtin_function (const char* name
,
3292 enum built_in_class cl
,
3293 const char* libname
,
3296 /* All builtins that don't begin with an '_' should additionally
3297 go in the 'std' namespace. */
3300 push_namespace (std_identifier
);
3301 builtin_function_1 (name
, type
, std_node
, code
, cl
, libname
, attrs
);
3305 return builtin_function_1 (name
, type
, NULL_TREE
, code
,
3306 cl
, libname
, attrs
);
3309 /* Generate a FUNCTION_DECL with the typical flags for a runtime library
3310 function. Not called directly. */
3313 build_library_fn_1 (tree name
, enum tree_code operator_code
, tree type
)
3315 tree fn
= build_lang_decl (FUNCTION_DECL
, name
, type
);
3316 DECL_EXTERNAL (fn
) = 1;
3317 TREE_PUBLIC (fn
) = 1;
3318 DECL_ARTIFICIAL (fn
) = 1;
3319 TREE_NOTHROW (fn
) = 1;
3320 SET_OVERLOADED_OPERATOR_CODE (fn
, operator_code
);
3321 SET_DECL_LANGUAGE (fn
, lang_c
);
3322 /* Runtime library routines are, by definition, available in an
3323 external shared object. */
3324 DECL_VISIBILITY (fn
) = VISIBILITY_DEFAULT
;
3325 DECL_VISIBILITY_SPECIFIED (fn
) = 1;
3329 /* Returns the _DECL for a library function with C linkage.
3330 We assume that such functions never throw; if this is incorrect,
3331 callers should unset TREE_NOTHROW. */
3334 build_library_fn (tree name
, tree type
)
3336 return build_library_fn_1 (name
, ERROR_MARK
, type
);
3339 /* Returns the _DECL for a library function with C++ linkage. */
3342 build_cp_library_fn (tree name
, enum tree_code operator_code
, tree type
)
3344 tree fn
= build_library_fn_1 (name
, operator_code
, type
);
3345 TREE_NOTHROW (fn
) = TYPE_NOTHROW_P (type
);
3346 DECL_CONTEXT (fn
) = FROB_CONTEXT (current_namespace
);
3347 SET_DECL_LANGUAGE (fn
, lang_cplusplus
);
3351 /* Like build_library_fn, but takes a C string instead of an
3355 build_library_fn_ptr (const char* name
, tree type
)
3357 return build_library_fn (get_identifier (name
), type
);
3360 /* Like build_cp_library_fn, but takes a C string instead of an
3364 build_cp_library_fn_ptr (const char* name
, tree type
)
3366 return build_cp_library_fn (get_identifier (name
), ERROR_MARK
, type
);
3369 /* Like build_library_fn, but also pushes the function so that we will
3370 be able to find it via IDENTIFIER_GLOBAL_VALUE. */
3373 push_library_fn (tree name
, tree type
)
3375 tree fn
= build_library_fn (name
, type
);
3376 pushdecl_top_level (fn
);
3380 /* Like build_cp_library_fn, but also pushes the function so that it
3381 will be found by normal lookup. */
3384 push_cp_library_fn (enum tree_code operator_code
, tree type
)
3386 tree fn
= build_cp_library_fn (ansi_opname (operator_code
),
3393 /* Like push_library_fn, but takes a TREE_LIST of parm types rather than
3397 push_void_library_fn (tree name
, tree parmtypes
)
3399 tree type
= build_function_type (void_type_node
, parmtypes
);
3400 return push_library_fn (name
, type
);
3403 /* Like push_library_fn, but also note that this function throws
3404 and does not return. Used for __throw_foo and the like. */
3407 push_throw_library_fn (tree name
, tree type
)
3409 tree fn
= push_library_fn (name
, type
);
3410 TREE_THIS_VOLATILE (fn
) = 1;
3411 TREE_NOTHROW (fn
) = 0;
3415 /* When we call finish_struct for an anonymous union, we create
3416 default copy constructors and such. But, an anonymous union
3417 shouldn't have such things; this function undoes the damage to the
3418 anonymous union type T.
3420 (The reason that we create the synthesized methods is that we don't
3421 distinguish `union { int i; }' from `typedef union { int i; } U'.
3422 The first is an anonymous union; the second is just an ordinary
3426 fixup_anonymous_aggr (tree t
)
3430 /* Wipe out memory of synthesized methods. */
3431 TYPE_HAS_CONSTRUCTOR (t
) = 0;
3432 TYPE_HAS_DEFAULT_CONSTRUCTOR (t
) = 0;
3433 TYPE_HAS_INIT_REF (t
) = 0;
3434 TYPE_HAS_CONST_INIT_REF (t
) = 0;
3435 TYPE_HAS_ASSIGN_REF (t
) = 0;
3436 TYPE_HAS_CONST_ASSIGN_REF (t
) = 0;
3438 /* Splice the implicitly generated functions out of the TYPE_METHODS
3440 q
= &TYPE_METHODS (t
);
3443 if (DECL_ARTIFICIAL (*q
))
3444 *q
= TREE_CHAIN (*q
);
3446 q
= &TREE_CHAIN (*q
);
3449 /* ISO C++ 9.5.3. Anonymous unions may not have function members. */
3450 if (TYPE_METHODS (t
))
3451 error ("%Jan anonymous union cannot have function members",
3452 TYPE_MAIN_DECL (t
));
3454 /* Anonymous aggregates cannot have fields with ctors, dtors or complex
3455 assignment operators (because they cannot have these methods themselves).
3456 For anonymous unions this is already checked because they are not allowed
3457 in any union, otherwise we have to check it. */
3458 if (TREE_CODE (t
) != UNION_TYPE
)
3462 for (field
= TYPE_FIELDS (t
); field
; field
= TREE_CHAIN (field
))
3463 if (TREE_CODE (field
) == FIELD_DECL
)
3465 type
= TREE_TYPE (field
);
3466 if (CLASS_TYPE_P (type
))
3468 if (TYPE_NEEDS_CONSTRUCTING (type
))
3469 cp_error_at ("member %q#D with constructor not allowed "
3470 "in anonymous aggregate",
3472 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type
))
3473 cp_error_at ("member %q#D with destructor not allowed "
3474 "in anonymous aggregate",
3476 if (TYPE_HAS_COMPLEX_ASSIGN_REF (type
))
3477 cp_error_at ("member %q#D with copy assignment operator "
3478 "not allowed in anonymous aggregate",
3485 /* Make sure that a declaration with no declarator is well-formed, i.e.
3486 just declares a tagged type or anonymous union.
3488 Returns the type declared; or NULL_TREE if none. */
3491 check_tag_decl (cp_decl_specifier_seq
*declspecs
)
3493 int saw_friend
= declspecs
->specs
[(int)ds_friend
] != 0;
3494 int saw_typedef
= declspecs
->specs
[(int)ds_typedef
] != 0;
3495 /* If a class, struct, or enum type is declared by the DECLSPECS
3496 (i.e, if a class-specifier, enum-specifier, or non-typename
3497 elaborated-type-specifier appears in the DECLSPECS),
3498 DECLARED_TYPE is set to the corresponding type. */
3499 tree declared_type
= NULL_TREE
;
3500 bool error_p
= false;
3502 if (declspecs
->multiple_types_p
)
3503 error ("multiple types in one declaration");
3504 else if (declspecs
->redefined_builtin_type
)
3506 if (!in_system_header
)
3507 pedwarn ("redeclaration of C++ built-in type %qT",
3508 declspecs
->redefined_builtin_type
);
3512 if (TYPE_P (declspecs
->type
)
3513 && ((TREE_CODE (declspecs
->type
) != TYPENAME_TYPE
3514 && IS_AGGR_TYPE (declspecs
->type
))
3515 || TREE_CODE (declspecs
->type
) == ENUMERAL_TYPE
))
3516 declared_type
= declspecs
->type
;
3517 else if (declspecs
->type
== error_mark_node
)
3519 if (declared_type
== NULL_TREE
&& ! saw_friend
&& !error_p
)
3520 pedwarn ("declaration does not declare anything");
3521 /* Check for an anonymous union. */
3522 else if (declared_type
&& IS_AGGR_TYPE_CODE (TREE_CODE (declared_type
))
3523 && TYPE_ANONYMOUS_P (declared_type
))
3525 /* 7/3 In a simple-declaration, the optional init-declarator-list
3526 can be omitted only when declaring a class (clause 9) or
3527 enumeration (7.2), that is, when the decl-specifier-seq contains
3528 either a class-specifier, an elaborated-type-specifier with
3529 a class-key (9.1), or an enum-specifier. In these cases and
3530 whenever a class-specifier or enum-specifier is present in the
3531 decl-specifier-seq, the identifiers in these specifiers are among
3532 the names being declared by the declaration (as class-name,
3533 enum-names, or enumerators, depending on the syntax). In such
3534 cases, and except for the declaration of an unnamed bit-field (9.6),
3535 the decl-specifier-seq shall introduce one or more names into the
3536 program, or shall redeclare a name introduced by a previous
3537 declaration. [Example:
3538 enum { }; // ill-formed
3539 typedef class { }; // ill-formed
3543 error ("missing type-name in typedef-declaration");
3546 /* Anonymous unions are objects, so they can have specifiers. */;
3547 SET_ANON_AGGR_TYPE_P (declared_type
);
3549 if (TREE_CODE (declared_type
) != UNION_TYPE
&& pedantic
3550 && !in_system_header
)
3551 pedwarn ("ISO C++ prohibits anonymous structs");
3556 if (declspecs
->specs
[(int)ds_inline
]
3557 || declspecs
->specs
[(int)ds_virtual
])
3558 error ("%qs can only be specified for functions",
3559 declspecs
->specs
[(int)ds_inline
]
3560 ? "inline" : "virtual");
3562 && (!current_class_type
3563 || current_scope () != current_class_type
))
3564 error ("%<friend%> can only be specified inside a class");
3565 else if (declspecs
->specs
[(int)ds_explicit
])
3566 error ("%<explicit%> can only be specified for constructors");
3567 else if (declspecs
->storage_class
)
3568 error ("a storage class can only be specified for objects "
3570 else if (declspecs
->specs
[(int)ds_const
]
3571 || declspecs
->specs
[(int)ds_volatile
]
3572 || declspecs
->specs
[(int)ds_restrict
]
3573 || declspecs
->specs
[(int)ds_thread
])
3574 error ("qualifiers can only be specified for objects "
3578 return declared_type
;
3581 /* Called when a declaration is seen that contains no names to declare.
3582 If its type is a reference to a structure, union or enum inherited
3583 from a containing scope, shadow that tag name for the current scope
3584 with a forward reference.
3585 If its type defines a new named structure or union
3586 or defines an enum, it is valid but we need not do anything here.
3587 Otherwise, it is an error.
3589 C++: may have to grok the declspecs to learn about static,
3590 complain for anonymous unions.
3592 Returns the TYPE declared -- or NULL_TREE if none. */
3595 shadow_tag (cp_decl_specifier_seq
*declspecs
)
3597 tree t
= check_tag_decl (declspecs
);
3602 if (declspecs
->attributes
)
3604 cp_warning_at ("attribute ignored in declaration of %q#T", t
);
3605 cp_warning_at ("attribute for %q#T must follow the %qs keyword",
3607 class_key_or_enum_as_string (t
));
3611 maybe_process_partial_specialization (t
);
3613 /* This is where the variables in an anonymous union are
3614 declared. An anonymous union declaration looks like:
3616 because there is no declarator after the union, the parser
3617 sends that declaration here. */
3618 if (ANON_AGGR_TYPE_P (t
))
3620 fixup_anonymous_aggr (t
);
3622 if (TYPE_FIELDS (t
))
3624 tree decl
= grokdeclarator (/*declarator=*/NULL
,
3625 declspecs
, NORMAL
, 0, NULL
);
3626 finish_anon_union (decl
);
3633 /* Decode a "typename", such as "int **", returning a ..._TYPE node. */
3636 groktypename (cp_decl_specifier_seq
*type_specifiers
,
3637 const cp_declarator
*declarator
)
3641 attrs
= type_specifiers
->attributes
;
3642 type_specifiers
->attributes
= NULL_TREE
;
3643 type
= grokdeclarator (declarator
, type_specifiers
, TYPENAME
, 0, &attrs
);
3645 cplus_decl_attributes (&type
, attrs
, 0);
3649 /* Decode a declarator in an ordinary declaration or data definition.
3650 This is called as soon as the type information and variable name
3651 have been parsed, before parsing the initializer if any.
3652 Here we create the ..._DECL node, fill in its type,
3653 and put it on the list of decls for the current context.
3654 The ..._DECL node is returned as the value.
3656 Exception: for arrays where the length is not specified,
3657 the type is left null, to be filled in by `cp_finish_decl'.
3659 Function definitions do not come here; they go to start_function
3660 instead. However, external and forward declarations of functions
3661 do go through here. Structure field declarations are done by
3662 grokfield and not through here. */
3665 start_decl (const cp_declarator
*declarator
,
3666 cp_decl_specifier_seq
*declspecs
,
3669 tree prefix_attributes
,
3676 *pop_scope_p
= false;
3678 /* This should only be done once on the top most decl. */
3679 if (have_extern_spec
)
3681 declspecs
->storage_class
= sc_extern
;
3682 have_extern_spec
= false;
3685 /* An object declared as __attribute__((deprecated)) suppresses
3686 warnings of uses of other deprecated items. */
3687 if (lookup_attribute ("deprecated", attributes
))
3688 deprecated_state
= DEPRECATED_SUPPRESS
;
3690 attributes
= chainon (attributes
, prefix_attributes
);
3692 decl
= grokdeclarator (declarator
, declspecs
, NORMAL
, initialized
,
3695 deprecated_state
= DEPRECATED_NORMAL
;
3697 if (decl
== NULL_TREE
|| TREE_CODE (decl
) == VOID_TYPE
)
3698 return error_mark_node
;
3700 type
= TREE_TYPE (decl
);
3702 if (type
== error_mark_node
)
3703 return error_mark_node
;
3705 context
= DECL_CONTEXT (decl
);
3708 *pop_scope_p
= push_scope (context
);
3710 /* We are only interested in class contexts, later. */
3711 if (context
&& TREE_CODE (context
) == NAMESPACE_DECL
)
3712 context
= NULL_TREE
;
3715 /* Is it valid for this decl to have an initializer at all?
3716 If not, set INITIALIZED to zero, which will indirectly
3717 tell `cp_finish_decl' to ignore the initializer once it is parsed. */
3718 switch (TREE_CODE (decl
))
3721 error ("typedef %qD is initialized (use __typeof__ instead)", decl
);
3726 error ("function %q#D is initialized like a variable", decl
);
3736 if (! toplevel_bindings_p ()
3737 && DECL_EXTERNAL (decl
))
3738 warning ("declaration of %q#D has %<extern%> and is initialized",
3740 DECL_EXTERNAL (decl
) = 0;
3741 if (toplevel_bindings_p ())
3742 TREE_STATIC (decl
) = 1;
3744 /* Tell `pushdecl' this is an initialized decl
3745 even though we don't yet have the initializer expression.
3746 Also tell `cp_finish_decl' it may store the real initializer. */
3747 DECL_INITIAL (decl
) = error_mark_node
;
3750 /* Set attributes here so if duplicate decl, will have proper attributes. */
3751 cplus_decl_attributes (&decl
, attributes
, 0);
3753 /* If #pragma weak was used, mark the decl weak now. */
3754 if (global_scope_p (current_binding_level
))
3755 maybe_apply_pragma_weak (decl
);
3757 if (TREE_CODE (decl
) == FUNCTION_DECL
3758 && DECL_DECLARED_INLINE_P (decl
)
3759 && DECL_UNINLINABLE (decl
)
3760 && lookup_attribute ("noinline", DECL_ATTRIBUTES (decl
)))
3761 warning ("%Jinline function %qD given attribute noinline", decl
, decl
);
3763 if (context
&& COMPLETE_TYPE_P (complete_type (context
)))
3765 if (TREE_CODE (decl
) == VAR_DECL
)
3767 tree field
= lookup_field (context
, DECL_NAME (decl
), 0, false);
3768 if (field
== NULL_TREE
|| TREE_CODE (field
) != VAR_DECL
)
3769 error ("%q#D is not a static member of %q#T", decl
, context
);
3772 if (DECL_CONTEXT (field
) != context
)
3774 if (!same_type_p (DECL_CONTEXT (field
), context
))
3775 pedwarn ("ISO C++ does not permit %<%T::%D%> "
3776 "to be defined as %<%T::%D%>",
3777 DECL_CONTEXT (field
), DECL_NAME (decl
),
3778 context
, DECL_NAME (decl
));
3779 DECL_CONTEXT (decl
) = DECL_CONTEXT (field
);
3781 if (processing_specialization
3782 && template_class_depth (context
) == 0
3783 && CLASSTYPE_TEMPLATE_SPECIALIZATION (context
))
3784 error ("template header not allowed in member definition "
3785 "of explicitly specialized class");
3786 /* Static data member are tricky; an in-class initialization
3787 still doesn't provide a definition, so the in-class
3788 declaration will have DECL_EXTERNAL set, but will have an
3789 initialization. Thus, duplicate_decls won't warn
3790 about this situation, and so we check here. */
3791 if (DECL_INITIAL (decl
) && DECL_INITIAL (field
))
3792 error ("duplicate initialization of %qD", decl
);
3793 if (duplicate_decls (decl
, field
))
3799 tree field
= check_classfn (context
, decl
,
3800 (processing_template_decl
3801 > template_class_depth (context
))
3802 ? current_template_parms
3804 if (field
&& duplicate_decls (decl
, field
))
3808 /* cp_finish_decl sets DECL_EXTERNAL if DECL_IN_AGGR_P is set. */
3809 DECL_IN_AGGR_P (decl
) = 0;
3810 if ((DECL_LANG_SPECIFIC (decl
) && DECL_USE_TEMPLATE (decl
))
3811 || CLASSTYPE_TEMPLATE_INSTANTIATION (context
))
3813 SET_DECL_TEMPLATE_SPECIALIZATION (decl
);
3814 /* [temp.expl.spec] An explicit specialization of a static data
3815 member of a template is a definition if the declaration
3816 includes an initializer; otherwise, it is a declaration.
3818 We check for processing_specialization so this only applies
3819 to the new specialization syntax. */
3820 if (DECL_INITIAL (decl
) == NULL_TREE
&& processing_specialization
)
3821 DECL_EXTERNAL (decl
) = 1;
3824 if (DECL_EXTERNAL (decl
) && ! DECL_TEMPLATE_SPECIALIZATION (decl
))
3825 pedwarn ("declaration of %q#D outside of class is not definition",
3829 /* Enter this declaration into the symbol table. */
3830 tem
= maybe_push_decl (decl
);
3832 if (processing_template_decl
)
3833 tem
= push_template_decl (tem
);
3834 if (tem
== error_mark_node
)
3835 return error_mark_node
;
3837 #if ! defined (ASM_OUTPUT_BSS) && ! defined (ASM_OUTPUT_ALIGNED_BSS)
3838 /* Tell the back-end to use or not use .common as appropriate. If we say
3839 -fconserve-space, we want this to save .data space, at the expense of
3840 wrong semantics. If we say -fno-conserve-space, we want this to
3841 produce errors about redefs; to do this we force variables into the
3843 DECL_COMMON (tem
) = ((TREE_CODE (tem
) != VAR_DECL
3844 || !DECL_THREAD_LOCAL (tem
))
3845 && (flag_conserve_space
|| ! TREE_PUBLIC (tem
)));
3848 if (! processing_template_decl
)
3855 start_decl_1 (tree decl
)
3857 tree type
= TREE_TYPE (decl
);
3858 int initialized
= (DECL_INITIAL (decl
) != NULL_TREE
);
3860 if (type
== error_mark_node
)
3864 /* Is it valid for this decl to have an initializer at all?
3865 If not, set INITIALIZED to zero, which will indirectly
3866 tell `cp_finish_decl' to ignore the initializer once it is parsed. */
3868 /* Don't allow initializations for incomplete types except for
3869 arrays which might be completed by the initialization. */
3870 if (COMPLETE_TYPE_P (complete_type (type
)))
3871 ; /* A complete type is ok. */
3872 else if (TREE_CODE (type
) != ARRAY_TYPE
)
3874 error ("variable %q#D has initializer but incomplete type", decl
);
3876 type
= TREE_TYPE (decl
) = error_mark_node
;
3878 else if (!COMPLETE_TYPE_P (complete_type (TREE_TYPE (type
))))
3880 if (DECL_LANG_SPECIFIC (decl
) && DECL_TEMPLATE_INFO (decl
))
3881 error ("elements of array %q#D have incomplete type", decl
);
3882 /* else we already gave an error in start_decl. */
3888 && TREE_CODE (decl
) != TYPE_DECL
3889 && TREE_CODE (decl
) != TEMPLATE_DECL
3890 && type
!= error_mark_node
3891 && IS_AGGR_TYPE (type
)
3892 && ! DECL_EXTERNAL (decl
))
3894 if ((! processing_template_decl
|| ! uses_template_parms (type
))
3895 && !COMPLETE_TYPE_P (complete_type (type
)))
3897 error ("aggregate %q#D has incomplete type and cannot be defined",
3899 /* Change the type so that assemble_variable will give
3900 DECL an rtl we can live with: (mem (const_int 0)). */
3901 type
= TREE_TYPE (decl
) = error_mark_node
;
3905 /* If any base type in the hierarchy of TYPE needs a constructor,
3906 then we set initialized to 1. This way any nodes which are
3907 created for the purposes of initializing this aggregate
3908 will live as long as it does. This is necessary for global
3909 aggregates which do not have their initializers processed until
3910 the end of the file. */
3911 initialized
= TYPE_NEEDS_CONSTRUCTING (type
);
3916 DECL_INITIAL (decl
) = NULL_TREE
;
3918 /* Create a new scope to hold this declaration if necessary.
3919 Whether or not a new scope is necessary cannot be determined
3920 until after the type has been completed; if the type is a
3921 specialization of a class template it is not until after
3922 instantiation has occurred that TYPE_HAS_NONTRIVIAL_DESTRUCTOR
3923 will be set correctly. */
3924 maybe_push_cleanup_level (type
);
3927 /* Handle initialization of references. DECL, TYPE, and INIT have the
3928 same meaning as in cp_finish_decl. *CLEANUP must be NULL on entry,
3929 but will be set to a new CLEANUP_STMT if a temporary is created
3930 that must be destroyed subsequently.
3932 Returns an initializer expression to use to initialize DECL, or
3933 NULL if the initialization can be performed statically.
3935 Quotes on semantics can be found in ARM 8.4.3. */
3938 grok_reference_init (tree decl
, tree type
, tree init
, tree
*cleanup
)
3942 if (init
== NULL_TREE
)
3944 if ((DECL_LANG_SPECIFIC (decl
) == 0
3945 || DECL_IN_AGGR_P (decl
) == 0)
3946 && ! DECL_THIS_EXTERN (decl
))
3947 error ("%qD declared as reference but not initialized", decl
);
3951 if (TREE_CODE (init
) == CONSTRUCTOR
)
3953 error ("ISO C++ forbids use of initializer list to "
3954 "initialize reference %qD", decl
);
3958 if (TREE_CODE (init
) == TREE_LIST
)
3959 init
= build_x_compound_expr_from_list (init
, "initializer");
3961 if (TREE_CODE (TREE_TYPE (init
)) == REFERENCE_TYPE
)
3962 init
= convert_from_reference (init
);
3964 if (TREE_CODE (TREE_TYPE (type
)) != ARRAY_TYPE
3965 && TREE_CODE (TREE_TYPE (init
)) == ARRAY_TYPE
)
3966 /* Note: default conversion is only called in very special cases. */
3967 init
= decay_conversion (init
);
3969 /* Convert INIT to the reference type TYPE. This may involve the
3970 creation of a temporary, whose lifetime must be the same as that
3971 of the reference. If so, a DECL_EXPR for the temporary will be
3972 added just after the DECL_EXPR for DECL. That's why we don't set
3973 DECL_INITIAL for local references (instead assigning to them
3974 explicitly); we need to allow the temporary to be initialized
3976 tmp
= initialize_reference (type
, init
, decl
, cleanup
);
3978 if (tmp
== error_mark_node
)
3980 else if (tmp
== NULL_TREE
)
3982 error ("cannot initialize %qT from %qT", type
, TREE_TYPE (init
));
3986 if (TREE_STATIC (decl
) && !TREE_CONSTANT (tmp
))
3989 DECL_INITIAL (decl
) = tmp
;
3994 /* When parsing `int a[] = {1, 2};' we don't know the size of the
3995 array until we finish parsing the initializer. If that's the
3996 situation we're in, update DECL accordingly. */
3999 maybe_deduce_size_from_array_init (tree decl
, tree init
)
4001 tree type
= TREE_TYPE (decl
);
4003 if (TREE_CODE (type
) == ARRAY_TYPE
4004 && TYPE_DOMAIN (type
) == NULL_TREE
4005 && TREE_CODE (decl
) != TYPE_DECL
)
4007 /* do_default is really a C-ism to deal with tentative definitions.
4008 But let's leave it here to ease the eventual merge. */
4009 int do_default
= !DECL_EXTERNAL (decl
);
4010 tree initializer
= init
? init
: DECL_INITIAL (decl
);
4011 int failure
= complete_array_type (type
, initializer
, do_default
);
4014 error ("initializer fails to determine size of %qD", decl
);
4019 error ("array size missing in %qD", decl
);
4020 /* If a `static' var's size isn't known, make it extern as
4021 well as static, so it does not get allocated. If it's not
4022 `static', then don't mark it extern; finish_incomplete_decl
4023 will give it a default size and it will get allocated. */
4024 else if (!pedantic
&& TREE_STATIC (decl
) && !TREE_PUBLIC (decl
))
4025 DECL_EXTERNAL (decl
) = 1;
4028 if (pedantic
&& TYPE_DOMAIN (type
) != NULL_TREE
4029 && tree_int_cst_lt (TYPE_MAX_VALUE (TYPE_DOMAIN (type
)),
4031 error ("zero-size array %qD", decl
);
4033 layout_decl (decl
, 0);
4037 /* Set DECL_SIZE, DECL_ALIGN, etc. for DECL (a VAR_DECL), and issue
4038 any appropriate error messages regarding the layout. */
4041 layout_var_decl (tree decl
)
4043 tree type
= TREE_TYPE (decl
);
4045 tree ttype
= target_type (type
);
4048 /* If we haven't already layed out this declaration, do so now.
4049 Note that we must not call complete type for an external object
4050 because it's type might involve templates that we are not
4051 supposed to instantiate yet. (And it's perfectly valid to say
4052 `extern X x' for some incomplete type `X'.) */
4053 if (!DECL_EXTERNAL (decl
))
4054 complete_type (type
);
4055 if (!DECL_SIZE (decl
)
4056 && TREE_TYPE (decl
) != error_mark_node
4057 && (COMPLETE_TYPE_P (type
)
4058 || (TREE_CODE (type
) == ARRAY_TYPE
4059 && !TYPE_DOMAIN (type
)
4060 && COMPLETE_TYPE_P (TREE_TYPE (type
)))))
4061 layout_decl (decl
, 0);
4063 if (!DECL_EXTERNAL (decl
) && DECL_SIZE (decl
) == NULL_TREE
)
4065 /* An automatic variable with an incomplete type: that is an error.
4066 Don't talk about array types here, since we took care of that
4067 message in grokdeclarator. */
4068 error ("storage size of %qD isn't known", decl
);
4069 TREE_TYPE (decl
) = error_mark_node
;
4072 /* Keep this code around in case we later want to control debug info
4073 based on whether a type is "used". (jason 1999-11-11) */
4075 else if (!DECL_EXTERNAL (decl
) && IS_AGGR_TYPE (ttype
))
4076 /* Let debugger know it should output info for this type. */
4077 note_debug_info_needed (ttype
);
4079 if (TREE_STATIC (decl
) && DECL_CLASS_SCOPE_P (decl
))
4080 note_debug_info_needed (DECL_CONTEXT (decl
));
4083 if ((DECL_EXTERNAL (decl
) || TREE_STATIC (decl
))
4084 && DECL_SIZE (decl
) != NULL_TREE
4085 && ! TREE_CONSTANT (DECL_SIZE (decl
)))
4087 if (TREE_CODE (DECL_SIZE (decl
)) == INTEGER_CST
)
4088 constant_expression_warning (DECL_SIZE (decl
));
4090 error ("storage size of %qD isn't constant", decl
);
4093 if (TREE_STATIC (decl
)
4094 && !DECL_ARTIFICIAL (decl
)
4095 && current_function_decl
4096 && DECL_CONTEXT (decl
) == current_function_decl
)
4097 push_local_name (decl
);
4100 /* If a local static variable is declared in an inline function, or if
4101 we have a weak definition, we must endeavor to create only one
4102 instance of the variable at link-time. */
4105 maybe_commonize_var (tree decl
)
4107 /* Static data in a function with comdat linkage also has comdat
4109 if (TREE_STATIC (decl
)
4110 /* Don't mess with __FUNCTION__. */
4111 && ! DECL_ARTIFICIAL (decl
)
4112 && DECL_FUNCTION_SCOPE_P (decl
)
4113 /* Unfortunately, import_export_decl has not always been called
4114 before the function is processed, so we cannot simply check
4116 && (DECL_COMDAT (DECL_CONTEXT (decl
))
4117 || ((DECL_DECLARED_INLINE_P (DECL_CONTEXT (decl
))
4118 || DECL_TEMPLATE_INSTANTIATION (DECL_CONTEXT (decl
)))
4119 && TREE_PUBLIC (DECL_CONTEXT (decl
)))))
4123 /* With weak symbols, we simply make the variable COMDAT;
4124 that will cause copies in multiple translations units to
4126 comdat_linkage (decl
);
4130 if (DECL_INITIAL (decl
) == NULL_TREE
4131 || DECL_INITIAL (decl
) == error_mark_node
)
4133 /* Without weak symbols, we can use COMMON to merge
4134 uninitialized variables. */
4135 TREE_PUBLIC (decl
) = 1;
4136 DECL_COMMON (decl
) = 1;
4140 /* While for initialized variables, we must use internal
4141 linkage -- which means that multiple copies will not
4143 TREE_PUBLIC (decl
) = 0;
4144 DECL_COMMON (decl
) = 0;
4145 cp_warning_at ("sorry: semantics of inline function static "
4146 "data %q#D are wrong (you'll wind up "
4147 "with multiple copies)", decl
);
4148 warning ("%J you can work around this by removing "
4154 else if (DECL_LANG_SPECIFIC (decl
) && DECL_COMDAT (decl
))
4155 /* Set it up again; we might have set DECL_INITIAL since the last
4157 comdat_linkage (decl
);
4160 /* Issue an error message if DECL is an uninitialized const variable. */
4163 check_for_uninitialized_const_var (tree decl
)
4165 tree type
= TREE_TYPE (decl
);
4167 /* ``Unless explicitly declared extern, a const object does not have
4168 external linkage and must be initialized. ($8.4; $12.1)'' ARM
4170 if (TREE_CODE (decl
) == VAR_DECL
4171 && TREE_CODE (type
) != REFERENCE_TYPE
4172 && CP_TYPE_CONST_P (type
)
4173 && !TYPE_NEEDS_CONSTRUCTING (type
)
4174 && !DECL_INITIAL (decl
))
4175 error ("uninitialized const %qD", decl
);
4178 /* FIELD is a FIELD_DECL or NULL. In the former case, the value
4179 returned is the next FIELD_DECL (possibly FIELD itself) that can be
4180 initialized. If there are no more such fields, the return value
4184 next_initializable_field (tree field
)
4187 && (TREE_CODE (field
) != FIELD_DECL
4188 || (DECL_C_BIT_FIELD (field
) && !DECL_NAME (field
))
4189 || DECL_ARTIFICIAL (field
)))
4190 field
= TREE_CHAIN (field
);
4195 /* Subroutine of reshape_init. Reshape the constructor for an array. INITP
4196 is the pointer to the old constructor list (to the CONSTRUCTOR_ELTS of
4197 the CONSTRUCTOR we are processing), while NEW_INIT is the CONSTRUCTOR we
4199 ELT_TYPE is the element type of the array. MAX_INDEX is an INTEGER_CST
4200 representing the size of the array minus one (the maximum index), or
4201 NULL_TREE if the array was declared without specifying the size. */
4204 reshape_init_array (tree elt_type
, tree max_index
,
4205 tree
*initp
, tree new_init
)
4207 bool sized_array_p
= (max_index
!= NULL_TREE
);
4208 HOST_WIDE_INT max_index_cst
= 0;
4209 HOST_WIDE_INT index
;
4212 /* HWI is either 32bit or 64bit, so it must be enough to represent the
4214 max_index_cst
= tree_low_cst (max_index
, 1);
4216 /* Loop until there are no more initializers. */
4218 *initp
&& (!sized_array_p
|| index
<= max_index_cst
);
4222 tree designated_index
;
4224 element_init
= reshape_init (elt_type
, initp
);
4225 if (element_init
== error_mark_node
)
4227 TREE_CHAIN (element_init
) = CONSTRUCTOR_ELTS (new_init
);
4228 CONSTRUCTOR_ELTS (new_init
) = element_init
;
4229 designated_index
= TREE_PURPOSE (element_init
);
4230 if (designated_index
)
4232 /* Handle array designated initializers (GNU extension). */
4233 if (TREE_CODE (designated_index
) == IDENTIFIER_NODE
)
4235 error ("name %qD used in a GNU-style designated "
4236 "initializer for an array", designated_index
);
4237 TREE_PURPOSE (element_init
) = NULL_TREE
;
4241 gcc_assert (TREE_CODE (designated_index
) == INTEGER_CST
);
4243 && tree_int_cst_lt (max_index
, designated_index
))
4245 error ("Designated initializer %qE larger than array "
4246 "size", designated_index
);
4247 TREE_PURPOSE (element_init
) = NULL_TREE
;
4250 index
= tree_low_cst (designated_index
, 1);
4258 /* Undo the brace-elision allowed by [dcl.init.aggr] in a
4259 brace-enclosed aggregate initializer.
4261 *INITP is one of a list of initializers describing a brace-enclosed
4262 initializer for an entity of the indicated aggregate TYPE. It may
4263 not presently match the shape of the TYPE; for example:
4265 struct S { int a; int b; };
4266 struct S a[] = { 1, 2, 3, 4 };
4268 Here *INITP will point to TREE_LIST of four elements, rather than a
4269 list of two elements, each itself a list of two elements. This
4270 routine transforms INIT from the former form into the latter. The
4271 revised initializer is returned. */
4274 reshape_init (tree type
, tree
*initp
)
4278 tree old_init_value
;
4280 bool brace_enclosed_p
;
4283 old_init_value
= (TREE_CODE (*initp
) == TREE_LIST
4284 ? TREE_VALUE (*initp
) : old_init
);
4286 gcc_assert (old_init_value
);
4288 /* If the initializer is brace-enclosed, pull initializers from the
4289 enclosed elements. Advance past the brace-enclosed initializer
4291 if (TREE_CODE (old_init_value
) == CONSTRUCTOR
4292 && BRACE_ENCLOSED_INITIALIZER_P (old_init_value
))
4294 *initp
= TREE_CHAIN (old_init
);
4295 TREE_CHAIN (old_init
) = NULL_TREE
;
4296 inits
= CONSTRUCTOR_ELTS (old_init_value
);
4298 brace_enclosed_p
= true;
4303 brace_enclosed_p
= false;
4306 /* A non-aggregate type is always initialized with a single
4308 if (!CP_AGGREGATE_TYPE_P (type
))
4310 *initp
= TREE_CHAIN (old_init
);
4311 TREE_CHAIN (old_init
) = NULL_TREE
;
4312 /* It is invalid to initialize a non-aggregate type with a
4313 brace-enclosed initializer. */
4314 if (brace_enclosed_p
)
4316 error ("brace-enclosed initializer used to initialize %qT",
4318 if (TREE_CODE (old_init
) == TREE_LIST
)
4319 TREE_VALUE (old_init
) = error_mark_node
;
4321 old_init
= error_mark_node
;
4329 All implicit type conversions (clause _conv_) are considered when
4330 initializing the aggregate member with an initializer from an
4331 initializer-list. If the initializer can initialize a member,
4332 the member is initialized. Otherwise, if the member is itself a
4333 non-empty subaggregate, brace elision is assumed and the
4334 initializer is considered for the initialization of the first
4335 member of the subaggregate. */
4336 if (!brace_enclosed_p
4337 && can_convert_arg (type
, TREE_TYPE (old_init_value
), old_init_value
))
4339 *initp
= TREE_CHAIN (old_init
);
4340 TREE_CHAIN (old_init
) = NULL_TREE
;
4344 if (TREE_CODE (old_init_value
) == STRING_CST
4345 && TREE_CODE (type
) == ARRAY_TYPE
4346 && char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (type
))))
4348 /* [dcl.init.string]
4350 A char array (whether plain char, signed char, or unsigned char)
4351 can be initialized by a string-literal (optionally enclosed in
4352 braces); a wchar_t array can be initialized by a wide
4353 string-literal (optionally enclosed in braces). */
4354 new_init
= old_init
;
4355 /* Move past the initializer. */
4356 *initp
= TREE_CHAIN (old_init
);
4357 TREE_CHAIN (old_init
) = NULL_TREE
;
4361 /* Build a CONSTRUCTOR to hold the contents of the aggregate. */
4362 new_init
= build_constructor (NULL_TREE
, NULL_TREE
);
4364 if (CLASS_TYPE_P (type
))
4368 field
= next_initializable_field (TYPE_FIELDS (type
));
4374 An initializer for an aggregate member that is an
4375 empty class shall have the form of an empty
4376 initializer-list {}. */
4377 if (!brace_enclosed_p
)
4379 error ("initializer for %qT must be brace-enclosed", type
);
4380 return error_mark_node
;
4385 /* Loop through the initializable fields, gathering
4391 /* Handle designated initializers, as an extension. */
4392 if (TREE_PURPOSE (*initp
))
4395 pedwarn ("ISO C++ does not allow designated initializers");
4396 field
= lookup_field_1 (type
, TREE_PURPOSE (*initp
),
4397 /*want_type=*/false);
4398 if (!field
|| TREE_CODE (field
) != FIELD_DECL
)
4399 error ("%qT has no non-static data member named %qD",
4400 type
, TREE_PURPOSE (*initp
));
4405 field_init
= reshape_init (TREE_TYPE (field
), initp
);
4406 if (field_init
== error_mark_node
)
4407 return error_mark_node
;
4408 TREE_CHAIN (field_init
) = CONSTRUCTOR_ELTS (new_init
);
4409 CONSTRUCTOR_ELTS (new_init
) = field_init
;
4412 When a union is initialized with a brace-enclosed
4413 initializer, the braces shall only contain an
4414 initializer for the first member of the union. */
4415 if (TREE_CODE (type
) == UNION_TYPE
)
4417 field
= next_initializable_field (TREE_CHAIN (field
));
4421 else if (TREE_CODE (type
) == ARRAY_TYPE
4422 || TREE_CODE (type
) == VECTOR_TYPE
)
4424 /* If the bound of the array is known, take no more initializers
4425 than are allowed. */
4426 tree max_index
= NULL_TREE
;
4427 if (TREE_CODE (type
) == ARRAY_TYPE
)
4429 if (TYPE_DOMAIN (type
))
4430 max_index
= array_type_nelts (type
);
4434 /* For a vector, the representation type is a struct
4435 containing a single member which is an array of the
4436 appropriate size. */
4437 tree rtype
= TYPE_DEBUG_REPRESENTATION_TYPE (type
);
4438 if (rtype
&& TYPE_DOMAIN (TREE_TYPE (TYPE_FIELDS (rtype
))))
4439 max_index
= array_type_nelts (TREE_TYPE (TYPE_FIELDS
4443 if (!reshape_init_array (TREE_TYPE (type
), max_index
,
4445 return error_mark_node
;
4450 /* The initializers were placed in reverse order in the
4452 CONSTRUCTOR_ELTS (new_init
) = nreverse (CONSTRUCTOR_ELTS (new_init
));
4454 if (TREE_CODE (old_init
) == TREE_LIST
)
4455 new_init
= build_tree_list (TREE_PURPOSE (old_init
), new_init
);
4458 /* If this was a brace-enclosed initializer and all of the
4459 initializers were not used up, there is a problem. */
4460 if (brace_enclosed_p
&& *initp
)
4461 error ("too many initializers for %qT", type
);
4466 /* Verify INIT (the initializer for DECL), and record the
4467 initialization in DECL_INITIAL, if appropriate. CLEANUP is as for
4468 grok_reference_init.
4470 If the return value is non-NULL, it is an expression that must be
4471 evaluated dynamically to initialize DECL. */
4474 check_initializer (tree decl
, tree init
, int flags
, tree
*cleanup
)
4476 tree type
= TREE_TYPE (decl
);
4477 tree init_code
= NULL
;
4479 /* If `start_decl' didn't like having an initialization, ignore it now. */
4480 if (init
!= NULL_TREE
&& DECL_INITIAL (decl
) == NULL_TREE
)
4483 /* If an initializer is present, DECL_INITIAL has been
4484 error_mark_node, to indicate that an as-of-yet unevaluated
4485 initialization will occur. From now on, DECL_INITIAL reflects
4486 the static initialization -- if any -- of DECL. */
4487 DECL_INITIAL (decl
) = NULL_TREE
;
4489 /* Things that are going to be initialized need to have complete
4491 TREE_TYPE (decl
) = type
= complete_type (TREE_TYPE (decl
));
4493 if (type
== error_mark_node
)
4494 /* We will have already complained. */
4496 else if (init
&& COMPLETE_TYPE_P (type
)
4497 && !TREE_CONSTANT (TYPE_SIZE (type
)))
4499 error ("variable-sized object %qD may not be initialized", decl
);
4502 else if (TREE_CODE (type
) == ARRAY_TYPE
4503 && !COMPLETE_TYPE_P (complete_type (TREE_TYPE (type
))))
4505 error ("elements of array %q#D have incomplete type", decl
);
4508 else if (TREE_CODE (type
) != ARRAY_TYPE
&& !COMPLETE_TYPE_P (type
))
4510 error ("%qD has incomplete type", decl
);
4511 TREE_TYPE (decl
) = error_mark_node
;
4515 if (TREE_CODE (decl
) == CONST_DECL
)
4517 gcc_assert (TREE_CODE (decl
) != REFERENCE_TYPE
);
4519 DECL_INITIAL (decl
) = init
;
4521 gcc_assert (init
!= NULL_TREE
);
4524 else if (!DECL_EXTERNAL (decl
) && TREE_CODE (type
) == REFERENCE_TYPE
)
4525 init
= grok_reference_init (decl
, type
, init
, cleanup
);
4528 if (TREE_CODE (init
) == CONSTRUCTOR
4529 && BRACE_ENCLOSED_INITIALIZER_P (init
))
4531 /* [dcl.init] paragraph 13,
4532 If T is a scalar type, then a declaration of the form
4537 reshape_init will complain about the extra braces,
4538 and doesn't do anything useful in the case where TYPE is
4539 scalar, so just don't call it. */
4540 if (CP_AGGREGATE_TYPE_P (type
))
4541 init
= reshape_init (type
, &init
);
4543 if ((*targetm
.vector_opaque_p
) (type
))
4545 error ("opaque vector types cannot be initialized");
4546 init
= error_mark_node
;
4550 /* If DECL has an array type without a specific bound, deduce the
4551 array size from the initializer. */
4552 maybe_deduce_size_from_array_init (decl
, init
);
4553 type
= TREE_TYPE (decl
);
4555 if (TYPE_HAS_CONSTRUCTOR (type
) || TYPE_NEEDS_CONSTRUCTING (type
))
4557 if (TREE_CODE (type
) == ARRAY_TYPE
)
4558 goto initialize_aggr
;
4559 else if (TREE_CODE (init
) == CONSTRUCTOR
4560 && BRACE_ENCLOSED_INITIALIZER_P (init
))
4562 if (TYPE_NON_AGGREGATE_CLASS (type
))
4564 error ("%qD must be initialized by constructor, "
4567 init
= error_mark_node
;
4570 goto dont_use_constructor
;
4574 int saved_stmts_are_full_exprs_p
;
4577 saved_stmts_are_full_exprs_p
= 0;
4578 if (building_stmt_tree ())
4580 saved_stmts_are_full_exprs_p
= stmts_are_full_exprs_p ();
4581 current_stmt_tree ()->stmts_are_full_exprs_p
= 1;
4583 init
= build_aggr_init (decl
, init
, flags
);
4584 if (building_stmt_tree ())
4585 current_stmt_tree ()->stmts_are_full_exprs_p
=
4586 saved_stmts_are_full_exprs_p
;
4592 dont_use_constructor
:
4593 if (TREE_CODE (init
) != TREE_VEC
)
4595 init_code
= store_init_value (decl
, init
);
4600 else if (DECL_EXTERNAL (decl
))
4602 else if (TYPE_P (type
) && TYPE_NEEDS_CONSTRUCTING (type
))
4603 goto initialize_aggr
;
4604 else if (IS_AGGR_TYPE (type
))
4606 tree core_type
= strip_array_types (type
);
4608 if (CLASSTYPE_READONLY_FIELDS_NEED_INIT (core_type
))
4609 error ("structure %qD with uninitialized const members", decl
);
4610 if (CLASSTYPE_REF_FIELDS_NEED_INIT (core_type
))
4611 error ("structure %qD with uninitialized reference members", decl
);
4613 check_for_uninitialized_const_var (decl
);
4616 check_for_uninitialized_const_var (decl
);
4618 if (init
&& init
!= error_mark_node
)
4619 init_code
= build2 (INIT_EXPR
, type
, decl
, init
);
4624 /* If DECL is not a local variable, give it RTL. */
4627 make_rtl_for_nonlocal_decl (tree decl
, tree init
, const char* asmspec
)
4629 int toplev
= toplevel_bindings_p ();
4632 /* Set the DECL_ASSEMBLER_NAME for the object. */
4635 /* The `register' keyword, when used together with an
4636 asm-specification, indicates that the variable should be
4637 placed in a particular register. */
4638 if (TREE_CODE (decl
) == VAR_DECL
&& DECL_REGISTER (decl
))
4640 change_decl_assembler_name (decl
, get_identifier (asmspec
));
4641 DECL_HARD_REGISTER (decl
) = 1;
4644 set_user_assembler_name (decl
, asmspec
);
4647 /* Handle non-variables up front. */
4648 if (TREE_CODE (decl
) != VAR_DECL
)
4650 rest_of_decl_compilation (decl
, toplev
, at_eof
);
4654 /* If we see a class member here, it should be a static data
4656 if (DECL_LANG_SPECIFIC (decl
) && DECL_IN_AGGR_P (decl
))
4658 gcc_assert (TREE_STATIC (decl
));
4659 /* An in-class declaration of a static data member should be
4660 external; it is only a declaration, and not a definition. */
4661 if (init
== NULL_TREE
)
4662 gcc_assert (DECL_EXTERNAL (decl
));
4665 /* We don't create any RTL for local variables. */
4666 if (DECL_FUNCTION_SCOPE_P (decl
) && !TREE_STATIC (decl
))
4669 /* We defer emission of local statics until the corresponding
4670 DECL_EXPR is expanded. */
4671 defer_p
= DECL_FUNCTION_SCOPE_P (decl
) || DECL_VIRTUAL_P (decl
);
4673 /* We try to defer namespace-scope static constants so that they are
4674 not emitted into the object file unnecessarily. */
4675 if (!DECL_VIRTUAL_P (decl
)
4676 && TREE_READONLY (decl
)
4677 && DECL_INITIAL (decl
) != NULL_TREE
4678 && DECL_INITIAL (decl
) != error_mark_node
4679 && ! EMPTY_CONSTRUCTOR_P (DECL_INITIAL (decl
))
4681 && !TREE_PUBLIC (decl
))
4683 /* Fool with the linkage of static consts according to #pragma
4685 struct c_fileinfo
*finfo
= get_fileinfo (lbasename (input_filename
));
4686 if (!finfo
->interface_unknown
&& !TREE_PUBLIC (decl
))
4688 TREE_PUBLIC (decl
) = 1;
4689 DECL_EXTERNAL (decl
) = finfo
->interface_only
;
4694 /* Likewise for template instantiations. */
4695 else if (DECL_LANG_SPECIFIC (decl
)
4696 && DECL_IMPLICIT_INSTANTIATION (decl
))
4699 /* If we're not deferring, go ahead and assemble the variable. */
4701 rest_of_decl_compilation (decl
, toplev
, at_eof
);
4704 /* Generate code to initialize DECL (a local variable). */
4707 initialize_local_var (tree decl
, tree init
)
4709 tree type
= TREE_TYPE (decl
);
4712 gcc_assert (TREE_CODE (decl
) == VAR_DECL
4713 || TREE_CODE (decl
) == RESULT_DECL
);
4714 gcc_assert (!TREE_STATIC (decl
));
4716 if (DECL_SIZE (decl
) == NULL_TREE
)
4718 /* If we used it already as memory, it must stay in memory. */
4719 DECL_INITIAL (decl
) = NULL_TREE
;
4720 TREE_ADDRESSABLE (decl
) = TREE_USED (decl
);
4723 if (DECL_SIZE (decl
) && type
!= error_mark_node
)
4727 /* Compute and store the initial value. */
4728 already_used
= TREE_USED (decl
) || TREE_USED (type
);
4730 /* Perform the initialization. */
4733 int saved_stmts_are_full_exprs_p
;
4735 gcc_assert (building_stmt_tree ());
4736 saved_stmts_are_full_exprs_p
= stmts_are_full_exprs_p ();
4737 current_stmt_tree ()->stmts_are_full_exprs_p
= 1;
4738 finish_expr_stmt (init
);
4739 current_stmt_tree ()->stmts_are_full_exprs_p
=
4740 saved_stmts_are_full_exprs_p
;
4743 /* Set this to 0 so we can tell whether an aggregate which was
4744 initialized was ever used. Don't do this if it has a
4745 destructor, so we don't complain about the 'resource
4746 allocation is initialization' idiom. Now set
4747 attribute((unused)) on types so decls of that type will be
4748 marked used. (see TREE_USED, above.) */
4749 if (TYPE_NEEDS_CONSTRUCTING (type
)
4751 && TYPE_HAS_TRIVIAL_DESTRUCTOR (type
)
4752 && DECL_NAME (decl
))
4753 TREE_USED (decl
) = 0;
4754 else if (already_used
)
4755 TREE_USED (decl
) = 1;
4758 /* Generate a cleanup, if necessary. */
4759 cleanup
= cxx_maybe_build_cleanup (decl
);
4760 if (DECL_SIZE (decl
) && cleanup
)
4761 finish_decl_cleanup (decl
, cleanup
);
4764 /* DECL is a VAR_DECL for a compiler-generated variable with static
4765 storage duration (like a virtual table) whose initializer is a
4766 compile-time constant. Initialize the variable and provide it to
4770 initialize_artificial_var (tree decl
, tree init
)
4772 DECL_INITIAL (decl
) = build_constructor (NULL_TREE
, init
);
4773 DECL_INITIALIZED_P (decl
) = 1;
4774 determine_visibility (decl
);
4775 layout_var_decl (decl
);
4776 maybe_commonize_var (decl
);
4777 make_rtl_for_nonlocal_decl (decl
, init
, /*asmspec=*/NULL
);
4780 /* Finish processing of a declaration;
4781 install its line number and initial value.
4782 If the length of an array type is not known before,
4783 it must be determined now, from the initial value, or it is an error.
4785 INIT holds the value of an initializer that should be allowed to escape
4788 FLAGS is LOOKUP_ONLYCONVERTING if the = init syntax was used, else 0
4789 if the (init) syntax was used. */
4792 cp_finish_decl (tree decl
, tree init
, tree asmspec_tree
, int flags
)
4795 tree ttype
= NULL_TREE
;
4797 const char *asmspec
= NULL
;
4798 int was_readonly
= 0;
4799 bool var_definition_p
= false;
4801 if (decl
== error_mark_node
)
4806 error ("assignment (not initialization) in declaration");
4810 gcc_assert (TREE_CODE (decl
) != RESULT_DECL
);
4812 /* Assume no cleanup is required. */
4813 cleanup
= NULL_TREE
;
4815 /* If a name was specified, get the string. */
4816 if (global_scope_p (current_binding_level
))
4817 asmspec_tree
= maybe_apply_renaming_pragma (decl
, asmspec_tree
);
4819 asmspec
= TREE_STRING_POINTER (asmspec_tree
);
4821 if (init
&& TREE_CODE (init
) == NAMESPACE_DECL
)
4823 error ("cannot initialize %qD to namespace %qD", decl
, init
);
4827 if (current_class_type
4828 && CP_DECL_CONTEXT (decl
) == current_class_type
4829 && TYPE_BEING_DEFINED (current_class_type
)
4830 && (DECL_INITIAL (decl
) || init
))
4831 DECL_INITIALIZED_IN_CLASS_P (decl
) = 1;
4833 type
= TREE_TYPE (decl
);
4835 if (type
== error_mark_node
)
4838 if (TYPE_HAS_MUTABLE_P (type
))
4839 TREE_READONLY (decl
) = 0;
4841 if (processing_template_decl
)
4843 /* Add this declaration to the statement-tree. */
4844 if (at_function_scope_p ())
4845 add_decl_expr (decl
);
4847 if (init
&& DECL_INITIAL (decl
))
4848 DECL_INITIAL (decl
) = init
;
4849 if (TREE_CODE (decl
) == VAR_DECL
4850 && !DECL_PRETTY_FUNCTION_P (decl
)
4851 && !dependent_type_p (TREE_TYPE (decl
)))
4852 maybe_deduce_size_from_array_init (decl
, init
);
4856 /* Parameters are handled by store_parm_decls, not cp_finish_decl. */
4857 gcc_assert (TREE_CODE (decl
) != PARM_DECL
);
4859 /* Take care of TYPE_DECLs up front. */
4860 if (TREE_CODE (decl
) == TYPE_DECL
)
4862 if (type
!= error_mark_node
4863 && IS_AGGR_TYPE (type
) && DECL_NAME (decl
))
4865 if (TREE_TYPE (DECL_NAME (decl
)) && TREE_TYPE (decl
) != type
)
4866 warning ("shadowing previous type declaration of %q#D", decl
);
4867 set_identifier_type_value (DECL_NAME (decl
), decl
);
4870 /* If we have installed this as the canonical typedef for this
4871 type, and that type has not been defined yet, delay emitting
4872 the debug information for it, as we will emit it later. */
4873 if (TYPE_MAIN_DECL (TREE_TYPE (decl
)) == decl
4874 && !COMPLETE_TYPE_P (TREE_TYPE (decl
)))
4875 TYPE_DECL_SUPPRESS_DEBUG (decl
) = 1;
4877 rest_of_decl_compilation (decl
, DECL_CONTEXT (decl
) == NULL_TREE
,
4882 if (TREE_CODE (decl
) != FUNCTION_DECL
)
4883 ttype
= target_type (type
);
4886 /* Currently, GNU C++ puts constants in text space, making them
4887 impossible to initialize. In the future, one would hope for
4888 an operating system which understood the difference between
4889 initialization and the running of a program. */
4890 if (! DECL_EXTERNAL (decl
) && TREE_READONLY (decl
))
4893 if (TYPE_NEEDS_CONSTRUCTING (type
)
4894 || TREE_CODE (type
) == REFERENCE_TYPE
)
4895 TREE_READONLY (decl
) = 0;
4898 if (TREE_CODE (decl
) == VAR_DECL
)
4900 /* Only PODs can have thread-local storage. Other types may require
4901 various kinds of non-trivial initialization. */
4902 if (DECL_THREAD_LOCAL (decl
) && !pod_type_p (TREE_TYPE (decl
)))
4903 error ("%qD cannot be thread-local because it has non-POD type %qT",
4904 decl
, TREE_TYPE (decl
));
4905 /* Convert the initializer to the type of DECL, if we have not
4906 already initialized DECL. */
4907 if (!DECL_INITIALIZED_P (decl
)
4908 /* If !DECL_EXTERNAL then DECL is being defined. In the
4909 case of a static data member initialized inside the
4910 class-specifier, there can be an initializer even if DECL
4911 is *not* defined. */
4912 && (!DECL_EXTERNAL (decl
) || init
))
4914 init
= check_initializer (decl
, init
, flags
, &cleanup
);
4915 /* Thread-local storage cannot be dynamically initialized. */
4916 if (DECL_THREAD_LOCAL (decl
) && init
)
4918 error ("%qD is thread-local and so cannot be dynamically "
4919 "initialized", decl
);
4926 The memory occupied by any object of static storage
4927 duration is zero-initialized at program startup before
4928 any other initialization takes place.
4930 We cannot create an appropriate initializer until after
4931 the type of DECL is finalized. If DECL_INITIAL is set,
4932 then the DECL is statically initialized, and any
4933 necessary zero-initialization has already been performed. */
4934 if (TREE_STATIC (decl
) && !DECL_INITIAL (decl
))
4935 DECL_INITIAL (decl
) = build_zero_init (TREE_TYPE (decl
),
4936 /*nelts=*/NULL_TREE
,
4937 /*static_storage_p=*/true);
4938 /* Remember that the initialization for this variable has
4940 DECL_INITIALIZED_P (decl
) = 1;
4941 /* This declaration is the definition of this variable,
4942 unless we are initializing a static data member within
4943 the class specifier. */
4944 if (!DECL_EXTERNAL (decl
))
4945 var_definition_p
= true;
4946 /* The variable is being defined, so determine its
4948 determine_visibility (decl
);
4950 /* If the variable has an array type, lay out the type, even if
4951 there is no initializer. It is valid to index through the
4952 array, and we must get TYPE_ALIGN set correctly on the array
4954 else if (TREE_CODE (type
) == ARRAY_TYPE
)
4958 /* Add this declaration to the statement-tree. This needs to happen
4959 after the call to check_initializer so that the DECL_EXPR for a
4960 reference temp is added before the DECL_EXPR for the reference itself. */
4961 if (at_function_scope_p ())
4962 add_decl_expr (decl
);
4964 if (TREE_CODE (decl
) == VAR_DECL
)
4965 layout_var_decl (decl
);
4967 /* Output the assembler code and/or RTL code for variables and functions,
4968 unless the type is an undefined structure or union.
4969 If not, it will get done when the type is completed. */
4970 if (TREE_CODE (decl
) == VAR_DECL
|| TREE_CODE (decl
) == FUNCTION_DECL
)
4972 if (TREE_CODE (decl
) == VAR_DECL
)
4973 maybe_commonize_var (decl
);
4975 make_rtl_for_nonlocal_decl (decl
, init
, asmspec
);
4977 /* Check for abstractness of the type. Notice that there is no
4978 need to strip array types here since the check for those types
4979 is already done within create_array_type_for_decl. */
4980 if (TREE_CODE (type
) == FUNCTION_TYPE
4981 || TREE_CODE (type
) == METHOD_TYPE
)
4982 abstract_virtuals_error (decl
, TREE_TYPE (type
));
4984 abstract_virtuals_error (decl
, type
);
4986 if (TREE_CODE (decl
) == FUNCTION_DECL
4987 || TREE_TYPE (decl
) == error_mark_node
)
4988 /* No initialization required. */
4990 else if (DECL_EXTERNAL (decl
)
4991 && ! (DECL_LANG_SPECIFIC (decl
)
4992 && DECL_NOT_REALLY_EXTERN (decl
)))
4995 DECL_INITIAL (decl
) = init
;
4999 /* A variable definition. */
5000 if (DECL_FUNCTION_SCOPE_P (decl
))
5002 /* Initialize the local variable. */
5003 if (processing_template_decl
)
5005 if (init
|| DECL_INITIAL (decl
) == error_mark_node
)
5006 DECL_INITIAL (decl
) = init
;
5008 else if (!TREE_STATIC (decl
))
5009 initialize_local_var (decl
, init
);
5012 /* If a variable is defined, and then a subsequent
5013 definition with external linkage is encountered, we will
5014 get here twice for the same variable. We want to avoid
5015 calling expand_static_init more than once. For variables
5016 that are not static data members, we can call
5017 expand_static_init only when we actually process the
5018 initializer. It is not legal to redeclare a static data
5019 member, so this issue does not arise in that case. */
5020 if (var_definition_p
&& TREE_STATIC (decl
))
5021 expand_static_init (decl
, init
);
5025 /* If a CLEANUP_STMT was created to destroy a temporary bound to a
5026 reference, insert it in the statement-tree now. */
5028 push_cleanup (decl
, cleanup
, false);
5033 TREE_READONLY (decl
) = 1;
5035 /* If this was marked 'used', be sure it will be output. */
5036 if (lookup_attribute ("used", DECL_ATTRIBUTES (decl
)))
5037 mark_decl_referenced (decl
);
5040 /* This is here for a midend callback from c-common.c. */
5043 finish_decl (tree decl
, tree init
, tree asmspec_tree
)
5045 cp_finish_decl (decl
, init
, asmspec_tree
, 0);
5048 /* Returns a declaration for a VAR_DECL as if:
5050 extern "C" TYPE NAME;
5052 had been seen. Used to create compiler-generated global
5056 declare_global_var (tree name
, tree type
)
5060 push_to_top_level ();
5061 decl
= build_decl (VAR_DECL
, name
, type
);
5062 TREE_PUBLIC (decl
) = 1;
5063 DECL_EXTERNAL (decl
) = 1;
5064 DECL_ARTIFICIAL (decl
) = 1;
5065 /* If the user has explicitly declared this variable (perhaps
5066 because the code we are compiling is part of a low-level runtime
5067 library), then it is possible that our declaration will be merged
5068 with theirs by pushdecl. */
5069 decl
= pushdecl (decl
);
5070 cp_finish_decl (decl
, NULL_TREE
, NULL_TREE
, 0);
5071 pop_from_top_level ();
5076 /* Returns a pointer to the `atexit' function. Note that if
5077 FLAG_USE_CXA_ATEXIT is nonzero, then this will actually be the new
5078 `__cxa_atexit' function specified in the IA64 C++ ABI. */
5081 get_atexit_node (void)
5092 if (flag_use_cxa_atexit
)
5094 /* The declaration for `__cxa_atexit' is:
5096 int __cxa_atexit (void (*)(void *), void *, void *)
5098 We build up the argument types and then then function type
5101 /* First, build the pointer-to-function type for the first
5103 arg_types
= tree_cons (NULL_TREE
, ptr_type_node
, void_list_node
);
5104 fn_type
= build_function_type (void_type_node
, arg_types
);
5105 fn_ptr_type
= build_pointer_type (fn_type
);
5106 /* Then, build the rest of the argument types. */
5107 arg_types
= tree_cons (NULL_TREE
, ptr_type_node
, void_list_node
);
5108 arg_types
= tree_cons (NULL_TREE
, ptr_type_node
, arg_types
);
5109 arg_types
= tree_cons (NULL_TREE
, fn_ptr_type
, arg_types
);
5110 /* And the final __cxa_atexit type. */
5111 fn_type
= build_function_type (integer_type_node
, arg_types
);
5112 fn_ptr_type
= build_pointer_type (fn_type
);
5113 name
= "__cxa_atexit";
5117 /* The declaration for `atexit' is:
5119 int atexit (void (*)());
5121 We build up the argument types and then then function type
5123 fn_type
= build_function_type (void_type_node
, void_list_node
);
5124 fn_ptr_type
= build_pointer_type (fn_type
);
5125 arg_types
= tree_cons (NULL_TREE
, fn_ptr_type
, void_list_node
);
5126 /* Build the final atexit type. */
5127 fn_type
= build_function_type (integer_type_node
, arg_types
);
5131 /* Now, build the function declaration. */
5132 push_lang_context (lang_name_c
);
5133 atexit_fndecl
= build_library_fn_ptr (name
, fn_type
);
5134 mark_used (atexit_fndecl
);
5135 pop_lang_context ();
5136 atexit_node
= decay_conversion (atexit_fndecl
);
5141 /* Returns the __dso_handle VAR_DECL. */
5144 get_dso_handle_node (void)
5146 if (dso_handle_node
)
5147 return dso_handle_node
;
5149 /* Declare the variable. */
5150 dso_handle_node
= declare_global_var (get_identifier ("__dso_handle"),
5153 return dso_handle_node
;
5156 /* Begin a new function with internal linkage whose job will be simply
5157 to destroy some particular variable. */
5159 static GTY(()) int start_cleanup_cnt
;
5162 start_cleanup_fn (void)
5169 push_to_top_level ();
5171 /* No need to mangle this. */
5172 push_lang_context (lang_name_c
);
5174 /* Build the parameter-types. */
5175 parmtypes
= void_list_node
;
5176 /* Functions passed to __cxa_atexit take an additional parameter.
5177 We'll just ignore it. After we implement the new calling
5178 convention for destructors, we can eliminate the use of
5179 additional cleanup functions entirely in the -fnew-abi case. */
5180 if (flag_use_cxa_atexit
)
5181 parmtypes
= tree_cons (NULL_TREE
, ptr_type_node
, parmtypes
);
5182 /* Build the function type itself. */
5183 fntype
= build_function_type (void_type_node
, parmtypes
);
5184 /* Build the name of the function. */
5185 sprintf (name
, "__tcf_%d", start_cleanup_cnt
++);
5186 /* Build the function declaration. */
5187 fndecl
= build_lang_decl (FUNCTION_DECL
, get_identifier (name
), fntype
);
5188 /* It's a function with internal linkage, generated by the
5190 TREE_PUBLIC (fndecl
) = 0;
5191 DECL_ARTIFICIAL (fndecl
) = 1;
5192 /* Make the function `inline' so that it is only emitted if it is
5193 actually needed. It is unlikely that it will be inlined, since
5194 it is only called via a function pointer, but we avoid unnecessary
5195 emissions this way. */
5196 DECL_INLINE (fndecl
) = 1;
5197 DECL_DECLARED_INLINE_P (fndecl
) = 1;
5198 DECL_INTERFACE_KNOWN (fndecl
) = 1;
5199 /* Build the parameter. */
5200 if (flag_use_cxa_atexit
)
5204 parmdecl
= cp_build_parm_decl (NULL_TREE
, ptr_type_node
);
5205 DECL_CONTEXT (parmdecl
) = fndecl
;
5206 TREE_USED (parmdecl
) = 1;
5207 DECL_ARGUMENTS (fndecl
) = parmdecl
;
5211 start_preparsed_function (fndecl
, NULL_TREE
, SF_PRE_PARSED
);
5213 pop_lang_context ();
5215 return current_function_decl
;
5218 /* Finish the cleanup function begun by start_cleanup_fn. */
5221 end_cleanup_fn (void)
5223 expand_or_defer_fn (finish_function (0));
5225 pop_from_top_level ();
5228 /* Generate code to handle the destruction of DECL, an object with
5229 static storage duration. */
5232 register_dtor_fn (tree decl
)
5239 if (TYPE_HAS_TRIVIAL_DESTRUCTOR (TREE_TYPE (decl
)))
5240 return void_zero_node
;
5242 /* Call build_cleanup before we enter the anonymous function so that
5243 any access checks will be done relative to the current scope,
5244 rather than the scope of the anonymous function. */
5245 build_cleanup (decl
);
5247 /* Now start the function. */
5248 cleanup
= start_cleanup_fn ();
5250 /* Now, recompute the cleanup. It may contain SAVE_EXPRs that refer
5251 to the original function, rather than the anonymous one. That
5252 will make the back-end think that nested functions are in use,
5253 which causes confusion. */
5255 push_deferring_access_checks (dk_no_check
);
5256 fcall
= build_cleanup (decl
);
5257 pop_deferring_access_checks ();
5259 /* Create the body of the anonymous function. */
5260 compound_stmt
= begin_compound_stmt (BCS_FN_BODY
);
5261 finish_expr_stmt (fcall
);
5262 finish_compound_stmt (compound_stmt
);
5265 /* Call atexit with the cleanup function. */
5266 cxx_mark_addressable (cleanup
);
5267 mark_used (cleanup
);
5268 cleanup
= build_unary_op (ADDR_EXPR
, cleanup
, 0);
5269 if (flag_use_cxa_atexit
)
5271 args
= tree_cons (NULL_TREE
,
5272 build_unary_op (ADDR_EXPR
, get_dso_handle_node (), 0),
5274 args
= tree_cons (NULL_TREE
, null_pointer_node
, args
);
5275 args
= tree_cons (NULL_TREE
, cleanup
, args
);
5278 args
= tree_cons (NULL_TREE
, cleanup
, NULL_TREE
);
5279 return build_function_call (get_atexit_node (), args
);
5282 /* DECL is a VAR_DECL with static storage duration. INIT, if present,
5283 is its initializer. Generate code to handle the construction
5284 and destruction of DECL. */
5287 expand_static_init (tree decl
, tree init
)
5289 gcc_assert (TREE_CODE (decl
) == VAR_DECL
);
5290 gcc_assert (TREE_STATIC (decl
));
5292 /* Some variables require no initialization. */
5294 && !TYPE_NEEDS_CONSTRUCTING (TREE_TYPE (decl
))
5295 && TYPE_HAS_TRIVIAL_DESTRUCTOR (TREE_TYPE (decl
)))
5298 if (DECL_FUNCTION_SCOPE_P (decl
))
5300 /* Emit code to perform this initialization but once. */
5301 tree if_stmt
, inner_if_stmt
= NULL_TREE
;
5302 tree then_clause
, inner_then_clause
= NULL_TREE
;
5303 tree guard
, guard_addr
, guard_addr_list
;
5304 tree acquire_fn
, release_fn
, abort_fn
;
5307 /* Emit code to perform this initialization but once. This code
5310 static <type> guard;
5311 if (!guard.first_byte) {
5312 if (__cxa_guard_acquire (&guard)) {
5315 // Do initialization.
5316 flag = true; __cxa_guard_release (&guard);
5317 // Register variable for destruction at end of program.
5319 if (!flag) __cxa_guard_abort (&guard);
5323 Note that the `flag' variable is only set to 1 *after* the
5324 initialization is complete. This ensures that an exception,
5325 thrown during the construction, will cause the variable to
5326 reinitialized when we pass through this code again, as per:
5330 If the initialization exits by throwing an exception, the
5331 initialization is not complete, so it will be tried again
5332 the next time control enters the declaration.
5334 This process should be thread-safe, too; multiple threads
5335 should not be able to initialize the variable more than
5338 /* Create the guard variable. */
5339 guard
= get_guard (decl
);
5341 /* Begin the conditional initialization. */
5342 if_stmt
= begin_if_stmt ();
5343 finish_if_stmt_cond (get_guard_cond (guard
), if_stmt
);
5344 then_clause
= begin_compound_stmt (BCS_NO_SCOPE
);
5346 if (flag_threadsafe_statics
)
5348 guard_addr
= build_address (guard
);
5349 guard_addr_list
= build_tree_list (NULL_TREE
, guard_addr
);
5351 acquire_fn
= get_identifier ("__cxa_guard_acquire");
5352 release_fn
= get_identifier ("__cxa_guard_release");
5353 abort_fn
= get_identifier ("__cxa_guard_abort");
5354 if (!get_global_value_if_present (acquire_fn
, &acquire_fn
))
5356 tree argtypes
= tree_cons (NULL_TREE
, TREE_TYPE (guard_addr
),
5358 tree vfntype
= build_function_type (void_type_node
, argtypes
);
5359 acquire_fn
= push_library_fn
5360 (acquire_fn
, build_function_type (integer_type_node
, argtypes
));
5361 release_fn
= push_library_fn (release_fn
, vfntype
);
5362 abort_fn
= push_library_fn (abort_fn
, vfntype
);
5366 release_fn
= identifier_global_value (release_fn
);
5367 abort_fn
= identifier_global_value (abort_fn
);
5370 inner_if_stmt
= begin_if_stmt ();
5371 finish_if_stmt_cond (build_call (acquire_fn
, guard_addr_list
),
5374 inner_then_clause
= begin_compound_stmt (BCS_NO_SCOPE
);
5375 begin
= get_target_expr (boolean_false_node
);
5376 flag
= TARGET_EXPR_SLOT (begin
);
5378 TARGET_EXPR_CLEANUP (begin
)
5379 = build (COND_EXPR
, void_type_node
, flag
,
5381 build_call (abort_fn
, guard_addr_list
));
5382 CLEANUP_EH_ONLY (begin
) = 1;
5384 /* Do the initialization itself. */
5385 init
= add_stmt_to_compound (begin
, init
);
5386 init
= add_stmt_to_compound
5387 (init
, build (MODIFY_EXPR
, void_type_node
, flag
, boolean_true_node
));
5388 init
= add_stmt_to_compound
5389 (init
, build_call (release_fn
, guard_addr_list
));
5392 init
= add_stmt_to_compound (init
, set_guard (guard
));
5394 /* Use atexit to register a function for destroying this static
5396 init
= add_stmt_to_compound (init
, register_dtor_fn (decl
));
5398 finish_expr_stmt (init
);
5400 if (flag_threadsafe_statics
)
5402 finish_compound_stmt (inner_then_clause
);
5403 finish_then_clause (inner_if_stmt
);
5404 finish_if_stmt (inner_if_stmt
);
5407 finish_compound_stmt (then_clause
);
5408 finish_then_clause (if_stmt
);
5409 finish_if_stmt (if_stmt
);
5412 static_aggregates
= tree_cons (init
, decl
, static_aggregates
);
5416 /* Make TYPE a complete type based on INITIAL_VALUE.
5417 Return 0 if successful, 1 if INITIAL_VALUE can't be deciphered,
5418 2 if there was no information (in which case assume 0 if DO_DEFAULT). */
5421 complete_array_type (tree type
, tree initial_value
, int do_default
)
5423 tree maxindex
= NULL_TREE
;
5428 /* An array of character type can be initialized from a
5429 brace-enclosed string constant. */
5430 if (char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (type
)))
5431 && TREE_CODE (initial_value
) == CONSTRUCTOR
5432 && CONSTRUCTOR_ELTS (initial_value
)
5433 && (TREE_CODE (TREE_VALUE (CONSTRUCTOR_ELTS (initial_value
)))
5435 && TREE_CHAIN (CONSTRUCTOR_ELTS (initial_value
)) == NULL_TREE
)
5436 initial_value
= TREE_VALUE (CONSTRUCTOR_ELTS (initial_value
));
5438 /* Note MAXINDEX is really the maximum index, one less than the
5440 if (TREE_CODE (initial_value
) == STRING_CST
)
5443 = int_size_in_bytes (TREE_TYPE (TREE_TYPE (initial_value
)));
5444 maxindex
= build_int_cst (NULL_TREE
,
5445 (TREE_STRING_LENGTH (initial_value
)
5448 else if (TREE_CODE (initial_value
) == CONSTRUCTOR
)
5450 tree elts
= CONSTRUCTOR_ELTS (initial_value
);
5452 maxindex
= ssize_int (-1);
5453 for (; elts
; elts
= TREE_CHAIN (elts
))
5455 if (TREE_PURPOSE (elts
))
5456 maxindex
= TREE_PURPOSE (elts
);
5458 maxindex
= size_binop (PLUS_EXPR
, maxindex
, ssize_int (1));
5463 /* Make an error message unless that happened already. */
5464 if (initial_value
!= error_mark_node
)
5467 initial_value
= NULL_TREE
;
5469 /* Prevent further error messages. */
5470 maxindex
= build_int_cst (NULL_TREE
, 0);
5477 maxindex
= build_int_cst (NULL_TREE
, 0);
5487 domain
= build_index_type (maxindex
);
5488 TYPE_DOMAIN (type
) = domain
;
5491 itype
= TREE_TYPE (initial_value
);
5494 if (itype
&& !TYPE_DOMAIN (itype
))
5495 TYPE_DOMAIN (itype
) = domain
;
5496 /* The type of the main variant should never be used for arrays
5497 of different sizes. It should only ever be completed with the
5498 size of the array. */
5499 if (! TYPE_DOMAIN (TYPE_MAIN_VARIANT (type
)))
5500 TYPE_DOMAIN (TYPE_MAIN_VARIANT (type
)) = domain
;
5502 elt_type
= TREE_TYPE (type
);
5503 TYPE_NEEDS_CONSTRUCTING (type
)
5504 = TYPE_NEEDS_CONSTRUCTING (TYPE_MAIN_VARIANT (elt_type
));
5505 TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type
)
5506 = TYPE_HAS_NONTRIVIAL_DESTRUCTOR (TYPE_MAIN_VARIANT (elt_type
));
5509 /* Lay out the type now that we can get the real answer. */
5516 /* Return zero if something is declared to be a member of type
5517 CTYPE when in the context of CUR_TYPE. STRING is the error
5518 message to print in that case. Otherwise, quietly return 1. */
5521 member_function_or_else (tree ctype
, tree cur_type
, enum overload_flags flags
)
5523 if (ctype
&& ctype
!= cur_type
)
5525 if (flags
== DTOR_FLAG
)
5526 error ("destructor for alien class %qT cannot be a member", ctype
);
5528 error ("constructor for alien class %qT cannot be a member", ctype
);
5534 /* Subroutine of `grokdeclarator'. */
5536 /* Generate errors possibly applicable for a given set of specifiers.
5537 This is for ARM $7.1.2. */
5540 bad_specifiers (tree object
,
5549 error ("%qD declared as a %<virtual%> %s", object
, type
);
5551 error ("%qD declared as an %<inline%> %s", object
, type
);
5553 error ("%<const%> and %<volatile%> function specifiers on "
5554 "%qD invalid in %s declaration",
5557 cp_error_at ("%qD declared as a friend", object
);
5559 && (TREE_CODE (object
) == TYPE_DECL
5560 || (!TYPE_PTRFN_P (TREE_TYPE (object
))
5561 && !TYPE_REFFN_P (TREE_TYPE (object
))
5562 && !TYPE_PTRMEMFUNC_P (TREE_TYPE (object
)))))
5563 cp_error_at ("%qD declared with an exception specification", object
);
5566 /* CTYPE is class type, or null if non-class.
5567 TYPE is type this FUNCTION_DECL should have, either FUNCTION_TYPE
5569 DECLARATOR is the function's name.
5570 PARMS is a chain of PARM_DECLs for the function.
5571 VIRTUALP is truthvalue of whether the function is virtual or not.
5572 FLAGS are to be passed through to `grokclassfn'.
5573 QUALS are qualifiers indicating whether the function is `const'
5575 RAISES is a list of exceptions that this function can raise.
5576 CHECK is 1 if we must find this method in CTYPE, 0 if we should
5577 not look, and -1 if we should not call `grokclassfn' at all.
5579 Returns `NULL_TREE' if something goes wrong, after issuing
5580 applicable error messages. */
5583 grokfndecl (tree ctype
,
5587 tree orig_declarator
,
5589 enum overload_flags flags
,
5602 int staticp
= ctype
&& TREE_CODE (type
) == FUNCTION_TYPE
;
5603 int has_default_arg
= 0;
5607 type
= build_exception_variant (type
, raises
);
5609 decl
= build_lang_decl (FUNCTION_DECL
, declarator
, type
);
5610 DECL_ARGUMENTS (decl
) = parms
;
5611 /* Propagate volatile out from type to decl. */
5612 if (TYPE_VOLATILE (type
))
5613 TREE_THIS_VOLATILE (decl
) = 1;
5615 /* If this decl has namespace scope, set that up. */
5617 set_decl_namespace (decl
, in_namespace
, friendp
);
5619 DECL_CONTEXT (decl
) = FROB_CONTEXT (current_namespace
);
5621 /* `main' and builtins have implicit 'C' linkage. */
5622 if ((MAIN_NAME_P (declarator
)
5623 || (IDENTIFIER_LENGTH (declarator
) > 10
5624 && IDENTIFIER_POINTER (declarator
)[0] == '_'
5625 && IDENTIFIER_POINTER (declarator
)[1] == '_'
5626 && strncmp (IDENTIFIER_POINTER (declarator
)+2, "builtin_", 8) == 0))
5627 && current_lang_name
== lang_name_cplusplus
5628 && ctype
== NULL_TREE
5629 /* NULL_TREE means global namespace. */
5630 && DECL_CONTEXT (decl
) == NULL_TREE
)
5631 SET_DECL_LANGUAGE (decl
, lang_c
);
5633 /* Should probably propagate const out from type to decl I bet (mrs). */
5636 DECL_STATIC_FUNCTION_P (decl
) = 1;
5637 DECL_CONTEXT (decl
) = ctype
;
5641 DECL_CONTEXT (decl
) = ctype
;
5643 if (ctype
== NULL_TREE
&& DECL_MAIN_P (decl
))
5645 if (processing_template_decl
)
5646 error ("cannot declare %<::main%> to be a template");
5648 error ("cannot declare %<::main%> to be inline");
5650 error ("cannot declare %<::main%> to be static");
5651 if (!same_type_p (TREE_TYPE (TREE_TYPE (decl
)),
5654 error ("%<::main%> must return %<int%>");
5655 TREE_TYPE (TREE_TYPE (decl
)) = integer_type_node
;
5661 /* Members of anonymous types and local classes have no linkage; make
5662 them internal. If a typedef is made later, this will be changed. */
5663 if (ctype
&& (TYPE_ANONYMOUS_P (ctype
)
5664 || decl_function_context (TYPE_MAIN_DECL (ctype
))))
5669 /* [basic.link]: A name with no linkage (notably, the name of a class
5670 or enumeration declared in a local scope) shall not be used to
5671 declare an entity with linkage.
5673 Only check this for public decls for now. See core 319, 389. */
5674 t
= no_linkage_check (TREE_TYPE (decl
),
5675 /*relaxed_p=*/false);
5678 if (TYPE_ANONYMOUS_P (t
))
5680 if (DECL_EXTERN_C_P (decl
))
5681 /* Allow this; it's pretty common in C. */;
5684 pedwarn ("non-local function %q#D uses anonymous type",
5686 if (DECL_ORIGINAL_TYPE (TYPE_NAME (t
)))
5687 cp_pedwarn_at ("%q#D does not refer to the unqualified "
5688 "type, so it is not used for linkage",
5693 pedwarn ("non-local function %q#D uses local type %qT", decl
, t
);
5697 TREE_PUBLIC (decl
) = publicp
;
5700 DECL_INTERFACE_KNOWN (decl
) = 1;
5701 DECL_NOT_REALLY_EXTERN (decl
) = 1;
5704 /* If the declaration was declared inline, mark it as such. */
5706 DECL_DECLARED_INLINE_P (decl
) = 1;
5707 /* We inline functions that are explicitly declared inline, or, when
5708 the user explicitly asks us to, all functions. */
5709 if (DECL_DECLARED_INLINE_P (decl
)
5710 || (flag_inline_trees
== 2 && !DECL_INLINE (decl
) && funcdef_flag
))
5711 DECL_INLINE (decl
) = 1;
5713 DECL_EXTERNAL (decl
) = 1;
5714 if (quals
&& TREE_CODE (type
) == FUNCTION_TYPE
)
5716 error ("%smember function %qD cannot have cv-qualifier",
5717 (ctype
? "static " : "non-"), decl
);
5718 quals
= TYPE_UNQUALIFIED
;
5721 if (IDENTIFIER_OPNAME_P (DECL_NAME (decl
)))
5722 grok_op_properties (decl
, friendp
, /*complain=*/true);
5724 if (ctype
&& decl_function_context (decl
))
5725 DECL_NO_STATIC_CHAIN (decl
) = 1;
5727 for (t
= TYPE_ARG_TYPES (TREE_TYPE (decl
)); t
; t
= TREE_CHAIN (t
))
5728 if (TREE_PURPOSE (t
)
5729 && TREE_CODE (TREE_PURPOSE (t
)) == DEFAULT_ARG
)
5731 has_default_arg
= 1;
5736 && TREE_CODE (orig_declarator
) == TEMPLATE_ID_EXPR
)
5740 ("defining explicit specialization %qD in friend declaration",
5744 tree fns
= TREE_OPERAND (orig_declarator
, 0);
5745 tree args
= TREE_OPERAND (orig_declarator
, 1);
5747 if (PROCESSING_REAL_TEMPLATE_DECL_P ())
5749 /* Something like `template <class T> friend void f<T>()'. */
5750 error ("invalid use of template-id %qD in declaration "
5751 "of primary template",
5757 /* A friend declaration of the form friend void f<>(). Record
5758 the information in the TEMPLATE_ID_EXPR. */
5759 SET_DECL_IMPLICIT_INSTANTIATION (decl
);
5761 if (TREE_CODE (fns
) == COMPONENT_REF
)
5763 /* Due to bison parser ickiness, we will have already looked
5764 up an operator_name or PFUNCNAME within the current class
5765 (see template_id in parse.y). If the current class contains
5766 such a name, we'll get a COMPONENT_REF here. Undo that. */
5768 gcc_assert (TREE_TYPE (TREE_OPERAND (fns
, 0))
5769 == current_class_type
);
5770 fns
= TREE_OPERAND (fns
, 1);
5772 gcc_assert (TREE_CODE (fns
) == IDENTIFIER_NODE
5773 || TREE_CODE (fns
) == OVERLOAD
);
5774 DECL_TEMPLATE_INFO (decl
) = tree_cons (fns
, args
, NULL_TREE
);
5776 if (has_default_arg
)
5778 error ("default arguments are not allowed in declaration "
5779 "of friend template specialization %qD",
5786 error ("%<inline%> is not allowed in declaration of friend "
5787 "template specialization %qD",
5795 /* Make the init_value nonzero so pushdecl knows this is not
5796 tentative. error_mark_node is replaced later with the BLOCK. */
5797 DECL_INITIAL (decl
) = error_mark_node
;
5799 if (TYPE_NOTHROW_P (type
) || nothrow_libfn_p (decl
))
5800 TREE_NOTHROW (decl
) = 1;
5802 /* Caller will do the rest of this. */
5806 if (flags
== NO_SPECIAL
&& ctype
&& constructor_name_p (declarator
, ctype
))
5807 DECL_CONSTRUCTOR_P (decl
) = 1;
5809 /* Function gets the ugly name, field gets the nice one. This call
5810 may change the type of the function (because of default
5812 if (ctype
!= NULL_TREE
)
5813 grokclassfn (ctype
, decl
, flags
, quals
);
5815 decl
= check_explicit_specialization (orig_declarator
, decl
,
5817 2 * (funcdef_flag
!= 0) +
5818 4 * (friendp
!= 0));
5819 if (decl
== error_mark_node
)
5824 cplus_decl_attributes (&decl
, *attrlist
, 0);
5825 *attrlist
= NULL_TREE
;
5828 if (ctype
!= NULL_TREE
5829 && (! TYPE_FOR_JAVA (ctype
) || check_java_method (decl
))
5834 old_decl
= check_classfn (ctype
, decl
,
5835 (processing_template_decl
5836 > template_class_depth (ctype
))
5837 ? current_template_parms
5840 if (old_decl
&& TREE_CODE (old_decl
) == TEMPLATE_DECL
)
5841 /* Because grokfndecl is always supposed to return a
5842 FUNCTION_DECL, we pull out the DECL_TEMPLATE_RESULT
5843 here. We depend on our callers to figure out that its
5844 really a template that's being returned. */
5845 old_decl
= DECL_TEMPLATE_RESULT (old_decl
);
5847 if (old_decl
&& DECL_STATIC_FUNCTION_P (old_decl
)
5848 && TREE_CODE (TREE_TYPE (decl
)) == METHOD_TYPE
)
5849 /* Remove the `this' parm added by grokclassfn.
5850 XXX Isn't this done in start_function, too? */
5851 revert_static_member_fn (decl
);
5852 if (old_decl
&& DECL_ARTIFICIAL (old_decl
))
5853 error ("definition of implicitly-declared %qD", old_decl
);
5860 /* Since we've smashed OLD_DECL to its
5861 DECL_TEMPLATE_RESULT, we must do the same to DECL. */
5862 if (TREE_CODE (decl
) == TEMPLATE_DECL
)
5863 decl
= DECL_TEMPLATE_RESULT (decl
);
5865 /* Attempt to merge the declarations. This can fail, in
5866 the case of some invalid specialization declarations. */
5867 pop_p
= push_scope (ctype
);
5868 ok
= duplicate_decls (decl
, old_decl
);
5873 error ("no %q#D member function declared in class %qT",
5881 if (DECL_CONSTRUCTOR_P (decl
) && !grok_ctor_properties (ctype
, decl
))
5884 if (ctype
== NULL_TREE
|| check
)
5888 DECL_VIRTUAL_P (decl
) = 1;
5893 /* DECL is a VAR_DECL for a static data member. Set flags to reflect
5894 the linkage that DECL will receive in the object file. */
5897 set_linkage_for_static_data_member (tree decl
)
5899 /* A static data member always has static storage duration and
5900 external linkage. Note that static data members are forbidden in
5901 local classes -- the only situation in which a class has
5902 non-external linkage. */
5903 TREE_PUBLIC (decl
) = 1;
5904 TREE_STATIC (decl
) = 1;
5905 /* For non-template classes, static data members are always put
5906 out in exactly those files where they are defined, just as
5907 with ordinary namespace-scope variables. */
5908 if (!processing_template_decl
)
5909 DECL_INTERFACE_KNOWN (decl
) = 1;
5912 /* Create a VAR_DECL named NAME with the indicated TYPE.
5914 If SCOPE is non-NULL, it is the class type or namespace containing
5915 the variable. If SCOPE is NULL, the variable should is created in
5916 the innermost enclosings scope. */
5919 grokvardecl (tree type
,
5921 const cp_decl_specifier_seq
*declspecs
,
5928 gcc_assert (!name
|| TREE_CODE (name
) == IDENTIFIER_NODE
);
5930 /* Compute the scope in which to place the variable. */
5933 /* An explicit "extern" specifier indicates a namespace-scope
5935 if (declspecs
->storage_class
== sc_extern
)
5936 scope
= current_namespace
;
5937 else if (!at_function_scope_p ())
5938 scope
= current_scope ();
5942 && (/* If the variable is a namespace-scope variable declared in a
5943 template, we need DECL_LANG_SPECIFIC. */
5944 (TREE_CODE (scope
) == NAMESPACE_DECL
&& processing_template_decl
)
5945 /* Similarly for namespace-scope variables with language linkage
5947 || (TREE_CODE (scope
) == NAMESPACE_DECL
5948 && current_lang_name
!= lang_name_cplusplus
)
5949 /* Similarly for static data members. */
5951 decl
= build_lang_decl (VAR_DECL
, name
, type
);
5953 decl
= build_decl (VAR_DECL
, name
, type
);
5955 if (scope
&& TREE_CODE (scope
) == NAMESPACE_DECL
)
5956 set_decl_namespace (decl
, scope
, 0);
5958 DECL_CONTEXT (decl
) = scope
;
5960 if (declspecs
->storage_class
== sc_extern
)
5962 DECL_THIS_EXTERN (decl
) = 1;
5963 DECL_EXTERNAL (decl
) = !initialized
;
5966 if (DECL_CLASS_SCOPE_P (decl
))
5968 set_linkage_for_static_data_member (decl
);
5969 /* This function is only called with out-of-class definitions. */
5970 DECL_EXTERNAL (decl
) = 0;
5972 /* At top level, either `static' or no s.c. makes a definition
5973 (perhaps tentative), and absence of `static' makes it public. */
5974 else if (toplevel_bindings_p ())
5976 TREE_PUBLIC (decl
) = (declspecs
->storage_class
!= sc_static
5977 && (DECL_THIS_EXTERN (decl
) || ! constp
));
5978 TREE_STATIC (decl
) = ! DECL_EXTERNAL (decl
);
5980 /* Not at top level, only `static' makes a static definition. */
5983 TREE_STATIC (decl
) = declspecs
->storage_class
== sc_static
;
5984 TREE_PUBLIC (decl
) = DECL_EXTERNAL (decl
);
5987 if (declspecs
->specs
[(int)ds_thread
])
5989 if (targetm
.have_tls
)
5990 DECL_THREAD_LOCAL (decl
) = 1;
5992 /* A mere warning is sure to result in improper semantics
5993 at runtime. Don't bother to allow this to compile. */
5994 error ("thread-local storage not supported for this target");
5997 if (TREE_PUBLIC (decl
))
5999 /* [basic.link]: A name with no linkage (notably, the name of a class
6000 or enumeration declared in a local scope) shall not be used to
6001 declare an entity with linkage.
6003 Only check this for public decls for now. */
6004 tree t1
= TREE_TYPE (decl
);
6005 tree t
= no_linkage_check (t1
, /*relaxed_p=*/false);
6008 if (TYPE_ANONYMOUS_P (t
))
6010 if (DECL_EXTERN_C_P (decl
))
6011 /* Allow this; it's pretty common in C. */
6013 else if (same_type_ignoring_top_level_qualifiers_p(t1
, t
))
6014 /* This is something like "enum { a = 3 } x;", which is
6015 well formed. The enum doesn't have "a name with no
6016 linkage", because it has no name. See closed CWG issue
6019 Note that while this construct is well formed in C++03
6020 it is likely to become ill formed in C++0x. See open
6021 CWG issue 389 and related issues. */
6025 /* It's a typedef referring to an anonymous type. */
6026 pedwarn ("non-local variable %q#D uses anonymous type",
6028 if (DECL_ORIGINAL_TYPE (TYPE_NAME (t
)))
6029 cp_pedwarn_at ("%q#D does not refer to the unqualified "
6030 "type, so it is not used for linkage",
6035 pedwarn ("non-local variable %q#D uses local type %qT", decl
, t
);
6042 /* Create and return a canonical pointer to member function type, for
6043 TYPE, which is a POINTER_TYPE to a METHOD_TYPE. */
6046 build_ptrmemfunc_type (tree type
)
6050 tree unqualified_variant
= NULL_TREE
;
6052 if (type
== error_mark_node
)
6055 /* If a canonical type already exists for this type, use it. We use
6056 this method instead of type_hash_canon, because it only does a
6057 simple equality check on the list of field members. */
6059 if ((t
= TYPE_GET_PTRMEMFUNC_TYPE (type
)))
6062 /* Make sure that we always have the unqualified pointer-to-member
6064 if (cp_type_quals (type
) != TYPE_UNQUALIFIED
)
6066 = build_ptrmemfunc_type (TYPE_MAIN_VARIANT (type
));
6068 t
= make_aggr_type (RECORD_TYPE
);
6069 xref_basetypes (t
, NULL_TREE
);
6071 /* Let the front-end know this is a pointer to member function... */
6072 TYPE_PTRMEMFUNC_FLAG (t
) = 1;
6073 /* ... and not really an aggregate. */
6074 SET_IS_AGGR_TYPE (t
, 0);
6076 field
= build_decl (FIELD_DECL
, pfn_identifier
, type
);
6079 field
= build_decl (FIELD_DECL
, delta_identifier
, delta_type_node
);
6080 TREE_CHAIN (field
) = fields
;
6083 finish_builtin_struct (t
, "__ptrmemfunc_type", fields
, ptr_type_node
);
6085 /* Zap out the name so that the back-end will give us the debugging
6086 information for this anonymous RECORD_TYPE. */
6087 TYPE_NAME (t
) = NULL_TREE
;
6089 /* If this is not the unqualified form of this pointer-to-member
6090 type, set the TYPE_MAIN_VARIANT for this type to be the
6091 unqualified type. Since they are actually RECORD_TYPEs that are
6092 not variants of each other, we must do this manually. */
6093 if (cp_type_quals (type
) != TYPE_UNQUALIFIED
)
6095 t
= build_qualified_type (t
, cp_type_quals (type
));
6096 TYPE_MAIN_VARIANT (t
) = unqualified_variant
;
6097 TYPE_NEXT_VARIANT (t
) = TYPE_NEXT_VARIANT (unqualified_variant
);
6098 TYPE_NEXT_VARIANT (unqualified_variant
) = t
;
6101 /* Cache this pointer-to-member type so that we can find it again
6103 TYPE_SET_PTRMEMFUNC_TYPE (type
, t
);
6108 /* Create and return a pointer to data member type. */
6111 build_ptrmem_type (tree class_type
, tree member_type
)
6113 if (TREE_CODE (member_type
) == METHOD_TYPE
)
6117 arg_types
= TYPE_ARG_TYPES (member_type
);
6118 class_type
= (cp_build_qualified_type
6120 cp_type_quals (TREE_TYPE (TREE_VALUE (arg_types
)))));
6122 = build_method_type_directly (class_type
,
6123 TREE_TYPE (member_type
),
6124 TREE_CHAIN (arg_types
));
6125 return build_ptrmemfunc_type (build_pointer_type (member_type
));
6129 gcc_assert (TREE_CODE (member_type
) != FUNCTION_TYPE
);
6130 return build_offset_type (class_type
, member_type
);
6134 /* DECL is a VAR_DECL defined in-class, whose TYPE is also given.
6135 Check to see that the definition is valid. Issue appropriate error
6136 messages. Return 1 if the definition is particularly bad, or 0
6140 check_static_variable_definition (tree decl
, tree type
)
6142 /* Motion 10 at San Diego: If a static const integral data member is
6143 initialized with an integral constant expression, the initializer
6144 may appear either in the declaration (within the class), or in
6145 the definition, but not both. If it appears in the class, the
6146 member is a member constant. The file-scope definition is always
6148 if (!ARITHMETIC_TYPE_P (type
) && TREE_CODE (type
) != ENUMERAL_TYPE
)
6150 error ("invalid in-class initialization of static data member "
6151 "of non-integral type %qT",
6153 /* If we just return the declaration, crashes will sometimes
6154 occur. We therefore return void_type_node, as if this were a
6155 friend declaration, to cause callers to completely ignore
6156 this declaration. */
6159 else if (!CP_TYPE_CONST_P (type
))
6160 error ("ISO C++ forbids in-class initialization of non-const "
6161 "static member %qD",
6163 else if (pedantic
&& !INTEGRAL_TYPE_P (type
))
6164 pedwarn ("ISO C++ forbids initialization of member constant "
6165 "%qD of non-integral type %qT", decl
, type
);
6170 /* Given the SIZE (i.e., number of elements) in an array, compute an
6171 appropriate index type for the array. If non-NULL, NAME is the
6172 name of the thing being declared. */
6175 compute_array_index_type (tree name
, tree size
)
6177 tree type
= TREE_TYPE (size
);
6180 /* The array bound must be an integer type. */
6181 if (!dependent_type_p (type
) && !INTEGRAL_TYPE_P (type
))
6184 error ("size of array %qD has non-integral type %qT", name
, type
);
6186 error ("size of array has non-integral type %qT", type
);
6187 size
= integer_one_node
;
6188 type
= TREE_TYPE (size
);
6191 if (abi_version_at_least (2)
6192 /* We should only handle value dependent expressions specially. */
6193 ? value_dependent_expression_p (size
)
6194 /* But for abi-1, we handled all instances in templates. This
6195 effects the manglings produced. */
6196 : processing_template_decl
)
6197 return build_index_type (build_min (MINUS_EXPR
, sizetype
,
6198 size
, integer_one_node
));
6200 /* The size might be the result of a cast. */
6201 STRIP_TYPE_NOPS (size
);
6203 /* It might be a const variable or enumeration constant. */
6204 size
= decl_constant_value (size
);
6206 /* Normally, the array-bound will be a constant. */
6207 if (TREE_CODE (size
) == INTEGER_CST
)
6209 /* Check to see if the array bound overflowed. Make that an
6210 error, no matter how generous we're being. */
6211 int old_flag_pedantic_errors
= flag_pedantic_errors
;
6212 int old_pedantic
= pedantic
;
6213 pedantic
= flag_pedantic_errors
= 1;
6214 constant_expression_warning (size
);
6215 pedantic
= old_pedantic
;
6216 flag_pedantic_errors
= old_flag_pedantic_errors
;
6218 /* An array must have a positive number of elements. */
6219 if (INT_CST_LT (size
, integer_zero_node
))
6222 error ("size of array %qD is negative", name
);
6224 error ("size of array is negative");
6225 size
= integer_one_node
;
6227 /* As an extension we allow zero-sized arrays. We always allow
6228 them in system headers because glibc uses them. */
6229 else if (integer_zerop (size
) && pedantic
&& !in_system_header
)
6232 pedwarn ("ISO C++ forbids zero-size array %qD", name
);
6234 pedwarn ("ISO C++ forbids zero-size array");
6237 else if (TREE_CONSTANT (size
))
6239 /* `(int) &fn' is not a valid array bound. */
6241 error ("size of array %qD is not an integral constant-expression",
6244 error ("size of array is not an integral constant-expression");
6249 pedwarn ("ISO C++ forbids variable-size array %qD", name
);
6251 pedwarn ("ISO C++ forbids variable-size array");
6254 if (processing_template_decl
&& !TREE_CONSTANT (size
))
6255 /* A variable sized array. */
6256 itype
= build_min (MINUS_EXPR
, sizetype
, size
, integer_one_node
);
6259 HOST_WIDE_INT saved_processing_template_decl
;
6261 /* Compute the index of the largest element in the array. It is
6262 one less than the number of elements in the array. We save
6263 and restore PROCESSING_TEMPLATE_DECL so that computations in
6264 cp_build_binary_op will be appropriately folded. */
6265 saved_processing_template_decl
= processing_template_decl
;
6266 processing_template_decl
= 0;
6267 itype
= cp_build_binary_op (MINUS_EXPR
,
6268 cp_convert (ssizetype
, size
),
6269 cp_convert (ssizetype
, integer_one_node
));
6270 itype
= fold (itype
);
6271 processing_template_decl
= saved_processing_template_decl
;
6273 if (!TREE_CONSTANT (itype
))
6274 /* A variable sized array. */
6275 itype
= variable_size (itype
);
6276 /* Make sure that there was no overflow when creating to a signed
6277 index type. (For example, on a 32-bit machine, an array with
6278 size 2^32 - 1 is too big.) */
6279 else if (TREE_OVERFLOW (itype
))
6281 error ("overflow in array dimension");
6282 TREE_OVERFLOW (itype
) = 0;
6286 /* Create and return the appropriate index type. */
6287 return build_index_type (itype
);
6290 /* Returns the scope (if any) in which the entity declared by
6291 DECLARATOR will be located. If the entity was declared with an
6292 unqualified name, NULL_TREE is returned. */
6295 get_scope_of_declarator (const cp_declarator
*declarator
)
6297 while (declarator
&& declarator
->kind
!= cdk_id
)
6298 declarator
= declarator
->declarator
;
6300 /* If the declarator-id is a SCOPE_REF, the scope in which the
6301 declaration occurs is the first operand. */
6303 && declarator
->u
.id
.name
6304 && TREE_CODE (declarator
->u
.id
.name
) == SCOPE_REF
)
6305 return TREE_OPERAND (declarator
->u
.id
.name
, 0);
6307 /* Otherwise, the declarator is not a qualified name; the entity will
6308 be declared in the current scope. */
6312 /* Returns an ARRAY_TYPE for an array with SIZE elements of the
6313 indicated TYPE. If non-NULL, NAME is the NAME of the declaration
6317 create_array_type_for_decl (tree name
, tree type
, tree size
)
6319 tree itype
= NULL_TREE
;
6320 const char* error_msg
;
6322 /* If things have already gone awry, bail now. */
6323 if (type
== error_mark_node
|| size
== error_mark_node
)
6324 return error_mark_node
;
6326 /* Assume that everything will go OK. */
6329 /* There are some types which cannot be array elements. */
6330 switch (TREE_CODE (type
))
6333 error_msg
= "array of void";
6337 error_msg
= "array of functions";
6340 case REFERENCE_TYPE
:
6341 error_msg
= "array of references";
6345 error_msg
= "array of function members";
6352 /* If something went wrong, issue an error-message and return. */
6356 error ("declaration of %qD as %s", name
, error_msg
);
6358 error ("creating %s", error_msg
);
6360 return error_mark_node
;
6365 The constant expressions that specify the bounds of the arrays
6366 can be omitted only for the first member of the sequence. */
6367 if (TREE_CODE (type
) == ARRAY_TYPE
&& !TYPE_DOMAIN (type
))
6370 error ("declaration of %qD as multidimensional array must "
6371 "have bounds for all dimensions except the first",
6374 error ("multidimensional array must have bounds for all "
6375 "dimensions except the first");
6377 return error_mark_node
;
6380 /* Figure out the index type for the array. */
6382 itype
= compute_array_index_type (name
, size
);
6385 T is called the array element type; this type shall not be [...] an
6386 abstract class type. */
6387 abstract_virtuals_error (name
, type
);
6389 return build_cplus_array_type (type
, itype
);
6392 /* Check that it's OK to declare a function with the indicated TYPE.
6393 SFK indicates the kind of special function (if any) that this
6394 function is. OPTYPE is the type given in a conversion operator
6395 declaration, or the class type for a constructor/destructor.
6396 Returns the actual return type of the function; that
6397 may be different than TYPE if an error occurs, or for certain
6398 special functions. */
6401 check_special_function_return_type (special_function_kind sfk
,
6407 case sfk_constructor
:
6409 error ("return type specification for constructor invalid");
6411 if (targetm
.cxx
.cdtor_returns_this () && !TYPE_FOR_JAVA (optype
))
6412 type
= build_pointer_type (optype
);
6414 type
= void_type_node
;
6417 case sfk_destructor
:
6419 error ("return type specification for destructor invalid");
6420 /* We can't use the proper return type here because we run into
6421 problems with ambiguous bases and covariant returns.
6422 Java classes are left unchanged because (void *) isn't a valid
6423 Java type, and we don't want to change the Java ABI. */
6424 if (targetm
.cxx
.cdtor_returns_this () && !TYPE_FOR_JAVA (optype
))
6425 type
= build_pointer_type (void_type_node
);
6427 type
= void_type_node
;
6430 case sfk_conversion
:
6431 if (type
&& !same_type_p (type
, optype
))
6432 error ("operator %qT declared to return %qT", optype
, type
);
6434 pedwarn ("return type specified for %<operator %T%>", optype
);
6445 /* A variable or data member (whose unqualified name is IDENTIFIER)
6446 has been declared with the indicated TYPE. If the TYPE is not
6447 acceptable, issue an error message and return a type to use for
6448 error-recovery purposes. */
6451 check_var_type (tree identifier
, tree type
)
6453 if (VOID_TYPE_P (type
))
6456 error ("unnamed variable or field declared void");
6457 else if (TREE_CODE (identifier
) == IDENTIFIER_NODE
)
6459 gcc_assert (!IDENTIFIER_OPNAME_P (identifier
));
6460 error ("variable or field %qE declared void", identifier
);
6463 error ("variable or field declared void");
6464 type
= integer_type_node
;
6470 /* Given declspecs and a declarator (abstract or otherwise), determine
6471 the name and type of the object declared and construct a DECL node
6474 DECLSPECS is a chain of tree_list nodes whose value fields
6475 are the storage classes and type specifiers.
6477 DECL_CONTEXT says which syntactic context this declaration is in:
6478 NORMAL for most contexts. Make a VAR_DECL or FUNCTION_DECL or TYPE_DECL.
6479 FUNCDEF for a function definition. Like NORMAL but a few different
6480 error messages in each case. Return value may be zero meaning
6481 this definition is too screwy to try to parse.
6482 MEMFUNCDEF for a function definition. Like FUNCDEF but prepares to
6483 handle member functions (which have FIELD context).
6484 Return value may be zero meaning this definition is too screwy to
6486 PARM for a parameter declaration (either within a function prototype
6487 or before a function body). Make a PARM_DECL, or return void_type_node.
6488 CATCHPARM for a parameter declaration before a catch clause.
6489 TYPENAME if for a typename (in a cast or sizeof).
6490 Don't make a DECL node; just return the ..._TYPE node.
6491 FIELD for a struct or union field; make a FIELD_DECL.
6492 BITFIELD for a field with specified width.
6493 INITIALIZED is 1 if the decl has an initializer.
6495 ATTRLIST is a pointer to the list of attributes, which may be NULL
6496 if there are none; *ATTRLIST may be modified if attributes from inside
6497 the declarator should be applied to the declaration.
6499 When this function is called, scoping variables (such as
6500 CURRENT_CLASS_TYPE) should reflect the scope in which the
6501 declaration occurs, not the scope in which the new declaration will
6502 be placed. For example, on:
6506 when grokdeclarator is called for `S::f', the CURRENT_CLASS_TYPE
6507 should not be `S'. */
6510 grokdeclarator (const cp_declarator
*declarator
,
6511 const cp_decl_specifier_seq
*declspecs
,
6512 enum decl_context decl_context
,
6516 tree type
= NULL_TREE
;
6519 int virtualp
, explicitp
, friendp
, inlinep
, staticp
;
6520 int explicit_int
= 0;
6521 int explicit_char
= 0;
6522 int defaulted_int
= 0;
6523 tree dependant_name
= NULL_TREE
;
6525 tree typedef_decl
= NULL_TREE
;
6526 const char *name
= NULL
;
6527 tree typedef_type
= NULL_TREE
;
6528 int funcdef_flag
= 0;
6529 cp_declarator_kind innermost_code
= cdk_error
;
6532 /* See the code below that used this. */
6533 tree decl_attr
= NULL_TREE
;
6536 /* Keep track of what sort of function is being processed
6537 so that we can warn about default return values, or explicit
6538 return values which do not match prescribed defaults. */
6539 special_function_kind sfk
= sfk_none
;
6541 tree dname
= NULL_TREE
;
6542 tree ctor_return_type
= NULL_TREE
;
6543 enum overload_flags flags
= NO_SPECIAL
;
6544 cp_cv_quals quals
= TYPE_UNQUALIFIED
;
6545 tree raises
= NULL_TREE
;
6546 int template_count
= 0;
6547 tree returned_attrs
= NULL_TREE
;
6548 tree parms
= NULL_TREE
;
6549 const cp_declarator
*id_declarator
;
6550 /* The unqualified name of the declarator; either an
6551 IDENTIFIER_NODE, BIT_NOT_EXPR, or TEMPLATE_ID_EXPR. */
6552 tree unqualified_id
;
6553 /* The class type, if any, in which this entity is located,
6554 or NULL_TREE if none. Note that this value may be different from
6555 the current class type; for example if an attempt is made to declare
6556 "A::f" inside "B", this value will be "A". */
6557 tree ctype
= current_class_type
;
6558 /* The NAMESPACE_DECL for the namespace in which this entity is
6559 located. If an unqualified name is used to declare the entity,
6560 this value will be NULL_TREE, even if the entity is located at
6562 tree in_namespace
= NULL_TREE
;
6564 cp_storage_class storage_class
;
6565 bool unsigned_p
, signed_p
, short_p
, long_p
, thread_p
;
6566 bool type_was_error_mark_node
= false;
6568 signed_p
= declspecs
->specs
[(int)ds_signed
];
6569 unsigned_p
= declspecs
->specs
[(int)ds_unsigned
];
6570 short_p
= declspecs
->specs
[(int)ds_short
];
6571 long_p
= declspecs
->specs
[(int)ds_long
];
6572 thread_p
= declspecs
->specs
[(int)ds_thread
];
6574 if (decl_context
== FUNCDEF
)
6575 funcdef_flag
= 1, decl_context
= NORMAL
;
6576 else if (decl_context
== MEMFUNCDEF
)
6577 funcdef_flag
= -1, decl_context
= FIELD
;
6578 else if (decl_context
== BITFIELD
)
6579 bitfield
= 1, decl_context
= FIELD
;
6581 /* Look inside a declarator for the name being declared
6582 and get it as a string, for an error message. */
6583 for (id_declarator
= declarator
;
6585 id_declarator
= id_declarator
->declarator
)
6587 if (id_declarator
->kind
!= cdk_id
)
6588 innermost_code
= id_declarator
->kind
;
6590 switch (id_declarator
->kind
)
6593 if (id_declarator
->declarator
6594 && id_declarator
->declarator
->kind
== cdk_id
)
6596 sfk
= id_declarator
->declarator
->u
.id
.sfk
;
6597 if (sfk
== sfk_destructor
)
6604 tree decl
= id_declarator
->u
.id
.name
;
6607 if (TREE_CODE (decl
) == SCOPE_REF
)
6609 tree qualifying_scope
= TREE_OPERAND (decl
, 0);
6611 /* It is valid to write:
6613 class C { void f(); };
6617 The standard is not clear about whether `typedef const C D' is
6618 legal; as of 2002-09-15 the committee is considering
6619 that question. EDG 3.0 allows that syntax.
6620 Therefore, we do as well. */
6621 if (qualifying_scope
&& TYPE_P (qualifying_scope
))
6623 ctype
= TYPE_MAIN_VARIANT (qualifying_scope
);
6624 if (innermost_code
!= cdk_function
6625 && current_class_type
6626 && !UNIQUELY_DERIVED_FROM_P (ctype
,
6627 current_class_type
))
6629 error ("type %qT is not derived from type %qT",
6630 ctype
, current_class_type
);
6633 TREE_OPERAND (decl
, 0) = ctype
;
6635 else if (TREE_CODE (qualifying_scope
) == NAMESPACE_DECL
)
6636 in_namespace
= qualifying_scope
;
6637 decl
= TREE_OPERAND (decl
, 1);
6639 if (TREE_CODE (decl
) == BASELINK
)
6640 decl
= BASELINK_FUNCTIONS (decl
);
6641 if (decl
== error_mark_node
)
6642 return error_mark_node
;
6643 switch (TREE_CODE (decl
))
6647 tree type
= TREE_OPERAND (decl
, 0);
6648 type
= constructor_name (type
);
6649 name
= IDENTIFIER_POINTER (type
);
6653 case TEMPLATE_ID_EXPR
:
6655 tree fns
= TREE_OPERAND (decl
, 0);
6658 if (TREE_CODE (dname
) == COMPONENT_REF
)
6659 dname
= TREE_OPERAND (dname
, 1);
6660 if (TREE_CODE (dname
) != IDENTIFIER_NODE
)
6662 gcc_assert (is_overloaded_fn (dname
));
6663 dname
= DECL_NAME (get_first_fn (dname
));
6668 case IDENTIFIER_NODE
:
6669 if (TREE_CODE (decl
) == IDENTIFIER_NODE
)
6672 if (C_IS_RESERVED_WORD (dname
))
6674 error ("declarator-id missing; using reserved word %qD",
6676 name
= IDENTIFIER_POINTER (dname
);
6678 else if (!IDENTIFIER_TYPENAME_P (dname
))
6679 name
= IDENTIFIER_POINTER (dname
);
6682 gcc_assert (flags
== NO_SPECIAL
);
6683 flags
= TYPENAME_FLAG
;
6684 ctor_return_type
= TREE_TYPE (dname
);
6685 sfk
= sfk_conversion
;
6686 if (is_typename_at_global_scope (dname
))
6687 name
= IDENTIFIER_POINTER (dname
);
6689 name
= "<invalid operator>";
6694 dname
= constructor_name (TREE_TYPE (decl
));
6695 name
= IDENTIFIER_POINTER (dname
);
6716 if (id_declarator
->kind
== cdk_id
)
6720 /* A function definition's declarator must have the form of
6721 a function declarator. */
6723 if (funcdef_flag
&& innermost_code
!= cdk_function
)
6726 if (((dname
&& IDENTIFIER_OPNAME_P (dname
)) || flags
== TYPENAME_FLAG
)
6727 && innermost_code
!= cdk_function
6728 && ! (ctype
&& !declspecs
->any_specifiers_p
))
6730 error ("declaration of %qD as non-function", dname
);
6731 return void_type_node
;
6734 /* Anything declared one level down from the top level
6735 must be one of the parameters of a function
6736 (because the body is at least two levels down). */
6738 /* This heuristic cannot be applied to C++ nodes! Fixed, however,
6739 by not allowing C++ class definitions to specify their parameters
6740 with xdecls (must be spec.d in the parmlist).
6742 Since we now wait to push a class scope until we are sure that
6743 we are in a legitimate method context, we must set oldcname
6744 explicitly (since current_class_name is not yet alive).
6746 We also want to avoid calling this a PARM if it is in a namespace. */
6748 if (decl_context
== NORMAL
&& !toplevel_bindings_p ())
6750 struct cp_binding_level
*b
= current_binding_level
;
6751 current_binding_level
= b
->level_chain
;
6752 if (current_binding_level
!= 0 && toplevel_bindings_p ())
6753 decl_context
= PARM
;
6754 current_binding_level
= b
;
6758 name
= decl_context
== PARM
? "parameter" : "type name";
6760 /* If there were multiple types specified in the decl-specifier-seq,
6761 issue an error message. */
6762 if (declspecs
->multiple_types_p
)
6763 error ("two or more data types in declaration of %qs", name
);
6764 /* Extract the basic type from the decl-specifier-seq. */
6765 type
= declspecs
->type
;
6766 if (type
== error_mark_node
)
6769 type_was_error_mark_node
= true;
6771 /* If the entire declaration is itself tagged as deprecated then
6772 suppress reports of deprecated items. */
6773 if (type
&& TREE_DEPRECATED (type
)
6774 && deprecated_state
!= DEPRECATED_SUPPRESS
)
6775 warn_deprecated_use (type
);
6776 if (type
&& TREE_CODE (type
) == TYPE_DECL
)
6778 typedef_decl
= type
;
6779 type
= TREE_TYPE (typedef_decl
);
6781 /* No type at all: default to `int', and set DEFAULTED_INT
6782 because it was not a user-defined typedef. */
6783 if (type
== NULL_TREE
&& (signed_p
|| unsigned_p
|| long_p
|| short_p
))
6785 /* These imply 'int'. */
6786 type
= integer_type_node
;
6790 explicit_int
= declspecs
->explicit_int_p
;
6791 explicit_char
= declspecs
->explicit_char_p
;
6793 /* Check for repeated decl-specifiers. */
6794 for (ds
= ds_first
; ds
!= ds_last
; ++ds
)
6796 unsigned count
= declspecs
->specs
[(int)ds
];
6799 /* The "long" specifier is a special case because of
6804 error ("%<long long long%> is too long for GCC");
6805 else if (pedantic
&& !in_system_header
&& warn_long_long
)
6806 pedwarn ("ISO C++ does not support %<long long%>");
6810 else if (declspecs
->specs
[(int)ds
] > 1)
6812 static const char *const decl_spec_names
[] = {
6828 error ("duplicate %qs", decl_spec_names
[(int)ds
]);
6833 /* See the code below that used this. */
6835 decl_attr
= DECL_ATTRIBUTES (typedef_decl
);
6837 typedef_type
= type
;
6840 if (sfk
!= sfk_conversion
)
6841 ctor_return_type
= ctype
;
6843 if (sfk
!= sfk_none
)
6844 type
= check_special_function_return_type (sfk
, type
,
6846 else if (type
== NULL_TREE
)
6852 /* We handle `main' specially here, because 'main () { }' is so
6853 common. With no options, it is allowed. With -Wreturn-type,
6854 it is a warning. It is only an error with -pedantic-errors. */
6855 is_main
= (funcdef_flag
6856 && dname
&& MAIN_NAME_P (dname
)
6857 && ctype
== NULL_TREE
6858 && in_namespace
== NULL_TREE
6859 && current_namespace
== global_namespace
);
6861 if (type_was_error_mark_node
)
6862 /* We've already issued an error, don't complain more. */;
6863 else if (in_system_header
|| flag_ms_extensions
)
6864 /* Allow it, sigh. */;
6865 else if (pedantic
|| ! is_main
)
6866 pedwarn ("ISO C++ forbids declaration of %qs with no type", name
);
6867 else if (warn_return_type
)
6868 warning ("ISO C++ forbids declaration of %qs with no type", name
);
6870 type
= integer_type_node
;
6875 /* Now process the modifiers that were specified
6876 and check for invalid combinations. */
6878 /* Long double is a special combination. */
6879 if (long_p
&& TYPE_MAIN_VARIANT (type
) == double_type_node
)
6882 type
= build_qualified_type (long_double_type_node
,
6883 cp_type_quals (type
));
6886 /* Check all other uses of type modifiers. */
6888 if (unsigned_p
|| signed_p
|| long_p
|| short_p
)
6892 if (TREE_CODE (type
) == REAL_TYPE
)
6893 error ("short, signed or unsigned invalid for %qs", name
);
6894 else if (TREE_CODE (type
) != INTEGER_TYPE
)
6895 error ("long, short, signed or unsigned invalid for %qs", name
);
6896 else if (long_p
&& short_p
)
6897 error ("long and short specified together for %qs", name
);
6898 else if ((long_p
|| short_p
) && explicit_char
)
6899 error ("long or short specified with char for %qs", name
);
6900 else if ((long_p
|| short_p
) && TREE_CODE (type
) == REAL_TYPE
)
6901 error ("long or short specified with floating type for %qs", name
);
6902 else if (signed_p
&& unsigned_p
)
6903 error ("signed and unsigned given together for %qs", name
);
6907 if (!explicit_int
&& !defaulted_int
&& !explicit_char
&& pedantic
)
6909 pedwarn ("long, short, signed or unsigned used invalidly for %qs",
6911 if (flag_pedantic_errors
)
6916 /* Discard the type modifiers if they are invalid. */
6927 /* Decide whether an integer type is signed or not.
6928 Optionally treat bitfields as signed by default. */
6932 It is implementation-defined whether a plain (neither
6933 explicitly signed or unsigned) char, short, int, or long
6934 bit-field is signed or unsigned.
6936 Naturally, we extend this to long long as well. Note that
6937 this does not include wchar_t. */
6938 || (bitfield
&& !flag_signed_bitfields
6940 /* A typedef for plain `int' without `signed' can be
6941 controlled just like plain `int', but a typedef for
6942 `signed int' cannot be so controlled. */
6944 && C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl
))
6945 && (TREE_CODE (type
) == INTEGER_TYPE
6946 || TREE_CODE (type
) == CHAR_TYPE
)
6947 && !same_type_p (TYPE_MAIN_VARIANT (type
), wchar_type_node
)))
6950 type
= long_long_unsigned_type_node
;
6952 type
= long_unsigned_type_node
;
6954 type
= short_unsigned_type_node
;
6955 else if (type
== char_type_node
)
6956 type
= unsigned_char_type_node
;
6957 else if (typedef_decl
)
6958 type
= c_common_unsigned_type (type
);
6960 type
= unsigned_type_node
;
6962 else if (signed_p
&& type
== char_type_node
)
6963 type
= signed_char_type_node
;
6965 type
= long_long_integer_type_node
;
6967 type
= long_integer_type_node
;
6969 type
= short_integer_type_node
;
6971 if (declspecs
->specs
[(int)ds_complex
])
6973 if (TREE_CODE (type
) != INTEGER_TYPE
&& TREE_CODE (type
) != REAL_TYPE
)
6974 error ("complex invalid for %qs", name
);
6975 /* If we just have "complex", it is equivalent to
6976 "complex double", but if any modifiers at all are specified it is
6977 the complex form of TYPE. E.g, "complex short" is
6978 "complex short int". */
6980 else if (defaulted_int
&& ! longlong
6981 && ! (long_p
|| short_p
|| signed_p
|| unsigned_p
))
6982 type
= complex_double_type_node
;
6983 else if (type
== integer_type_node
)
6984 type
= complex_integer_type_node
;
6985 else if (type
== float_type_node
)
6986 type
= complex_float_type_node
;
6987 else if (type
== double_type_node
)
6988 type
= complex_double_type_node
;
6989 else if (type
== long_double_type_node
)
6990 type
= complex_long_double_type_node
;
6992 type
= build_complex_type (type
);
6995 type_quals
= TYPE_UNQUALIFIED
;
6996 if (declspecs
->specs
[(int)ds_const
])
6997 type_quals
|= TYPE_QUAL_CONST
;
6998 if (declspecs
->specs
[(int)ds_volatile
])
6999 type_quals
|= TYPE_QUAL_VOLATILE
;
7000 if (declspecs
->specs
[(int)ds_restrict
])
7001 type_quals
|= TYPE_QUAL_RESTRICT
;
7002 if (sfk
== sfk_conversion
&& type_quals
!= TYPE_UNQUALIFIED
)
7003 error ("qualifiers are not allowed on declaration of %<operator %T%>",
7006 type_quals
|= cp_type_quals (type
);
7007 type
= cp_build_qualified_type_real
7008 (type
, type_quals
, ((typedef_decl
&& !DECL_ARTIFICIAL (typedef_decl
)
7009 ? tf_ignore_bad_quals
: 0) | tf_error
| tf_warning
));
7010 /* We might have ignored or rejected some of the qualifiers. */
7011 type_quals
= cp_type_quals (type
);
7014 inlinep
= !! declspecs
->specs
[(int)ds_inline
];
7015 virtualp
= !! declspecs
->specs
[(int)ds_virtual
];
7016 explicitp
= !! declspecs
->specs
[(int)ds_explicit
];
7018 storage_class
= declspecs
->storage_class
;
7019 if (storage_class
== sc_static
)
7020 staticp
= 1 + (decl_context
== FIELD
);
7022 if (virtualp
&& staticp
== 2)
7024 error ("member %qD cannot be declared both virtual and static", dname
);
7027 friendp
= !! declspecs
->specs
[(int)ds_friend
];
7029 if (dependant_name
&& !friendp
)
7031 error ("%<%T::%D%> is not a valid declarator", ctype
, dependant_name
);
7032 return void_type_node
;
7035 /* Issue errors about use of storage classes for parameters. */
7036 if (decl_context
== PARM
)
7038 if (declspecs
->specs
[(int)ds_typedef
])
7039 error ("typedef declaration invalid in parameter declaration");
7040 else if (storage_class
== sc_static
7041 || storage_class
== sc_extern
7043 error ("storage class specifiers invalid in parameter declarations");
7046 /* Give error if `virtual' is used outside of class declaration. */
7048 && (current_class_name
== NULL_TREE
|| decl_context
!= FIELD
))
7050 error ("virtual outside class declaration");
7054 /* Static anonymous unions are dealt with here. */
7055 if (staticp
&& decl_context
== TYPENAME
7057 && ANON_AGGR_TYPE_P (declspecs
->type
))
7058 decl_context
= FIELD
;
7060 /* Warn about storage classes that are invalid for certain
7061 kinds of declarations (parameters, typenames, etc.). */
7062 if (declspecs
->multiple_storage_classes_p
)
7063 error ("multiple storage classes in declaration of %qs", name
);
7066 && storage_class
!= sc_extern
7067 && storage_class
!= sc_static
)
7068 || declspecs
->specs
[(int)ds_typedef
]))
7070 error ("multiple storage classes in declaration of %qs", name
);
7073 else if (decl_context
!= NORMAL
7074 && ((storage_class
!= sc_none
7075 && storage_class
!= sc_mutable
)
7078 if ((decl_context
== PARM
|| decl_context
== CATCHPARM
)
7079 && (storage_class
== sc_register
7080 || storage_class
== sc_auto
))
7082 else if (declspecs
->specs
[(int)ds_typedef
])
7084 else if (decl_context
== FIELD
7085 /* C++ allows static class elements. */
7086 && storage_class
== sc_static
)
7087 /* C++ also allows inlines and signed and unsigned elements,
7088 but in those cases we don't come in here. */
7092 if (decl_context
== FIELD
)
7094 tree tmp
= NULL_TREE
;
7099 /* Avoid trying to get an operand off an identifier node. */
7100 if (declarator
->kind
!= cdk_id
)
7101 tmp
= declarator
->declarator
->u
.id
.name
;
7103 tmp
= declarator
->u
.id
.name
;
7104 op
= IDENTIFIER_OPNAME_P (tmp
);
7105 if (IDENTIFIER_TYPENAME_P (tmp
))
7107 if (is_typename_at_global_scope (tmp
))
7108 name
= IDENTIFIER_POINTER (tmp
);
7110 name
= "<invalid operator>";
7113 error ("storage class specified for %s %qs",
7114 op
? "member operator" : "field",
7119 if (decl_context
== PARM
|| decl_context
== CATCHPARM
)
7120 error ("storage class specified for parameter %qs", name
);
7122 error ("storage class specified for typename");
7124 if (storage_class
== sc_register
7125 || storage_class
== sc_auto
7126 || storage_class
== sc_extern
7128 storage_class
= sc_none
;
7131 else if (storage_class
== sc_extern
&& initialized
7134 if (toplevel_bindings_p ())
7136 /* It's common practice (and completely valid) to have a const
7137 be initialized and declared extern. */
7138 if (!(type_quals
& TYPE_QUAL_CONST
))
7139 warning ("%qs initialized and declared %<extern%>", name
);
7142 error ("%qs has both %<extern%> and initializer", name
);
7144 else if (storage_class
== sc_extern
&& funcdef_flag
7145 && ! toplevel_bindings_p ())
7146 error ("nested function %qs declared %<extern%>", name
);
7147 else if (toplevel_bindings_p ())
7149 if (storage_class
== sc_auto
)
7150 error ("top-level declaration of %qs specifies %<auto%>", name
);
7153 && storage_class
!= sc_extern
7154 && storage_class
!= sc_static
)
7156 error ("function-scope %qs implicitly auto and declared %<__thread%>",
7161 if (storage_class
&& friendp
)
7162 error ("storage class specifiers invalid in friend function declarations");
7165 unqualified_id
= NULL_TREE
;
7168 unqualified_id
= id_declarator
->u
.id
.name
;
7169 if (TREE_CODE (unqualified_id
) == SCOPE_REF
)
7170 unqualified_id
= TREE_OPERAND (unqualified_id
, 1);
7171 if (TREE_CODE (unqualified_id
) == BASELINK
)
7172 unqualified_id
= BASELINK_FUNCTIONS (unqualified_id
);
7173 switch (TREE_CODE (unqualified_id
))
7177 = constructor_name (TREE_OPERAND (unqualified_id
, 0));
7182 = constructor_name (TREE_TYPE (unqualified_id
));
7185 case IDENTIFIER_NODE
:
7186 case TEMPLATE_ID_EXPR
:
7194 /* Determine the type of the entity declared by recurring on the
7197 declarator
&& declarator
->kind
!= cdk_id
;
7198 declarator
= declarator
->declarator
)
7200 const cp_declarator
*inner_declarator
;
7203 if (type
== error_mark_node
)
7204 return error_mark_node
;
7206 inner_declarator
= declarator
->declarator
;
7208 attrs
= declarator
->attributes
;
7214 if (declarator
== NULL
|| declarator
->kind
== cdk_id
)
7215 attr_flags
|= (int) ATTR_FLAG_DECL_NEXT
;
7216 if (declarator
->kind
== cdk_function
)
7217 attr_flags
|= (int) ATTR_FLAG_FUNCTION_NEXT
;
7218 if (declarator
->kind
== cdk_array
)
7219 attr_flags
|= (int) ATTR_FLAG_ARRAY_NEXT
;
7220 returned_attrs
= decl_attributes (&type
,
7221 chainon (returned_attrs
, attrs
),
7225 switch (declarator
->kind
)
7228 type
= create_array_type_for_decl (dname
, type
,
7229 declarator
->u
.array
.bounds
);
7237 /* Declaring a function type.
7238 Make sure we have a valid type for the function to return. */
7240 /* We now know that the TYPE_QUALS don't apply to the
7241 decl, but to its return type. */
7242 type_quals
= TYPE_UNQUALIFIED
;
7244 /* Warn about some types functions can't return. */
7246 if (TREE_CODE (type
) == FUNCTION_TYPE
)
7248 error ("%qs declared as function returning a function", name
);
7249 type
= integer_type_node
;
7251 if (TREE_CODE (type
) == ARRAY_TYPE
)
7253 error ("%qs declared as function returning an array", name
);
7254 type
= integer_type_node
;
7257 /* Pick up type qualifiers which should be applied to `this'. */
7258 quals
= declarator
->u
.function
.qualifiers
;
7260 /* Pick up the exception specifications. */
7261 raises
= declarator
->u
.function
.exception_specification
;
7263 /* Say it's a definition only for the CALL_EXPR
7264 closest to the identifier. */
7265 funcdecl_p
= inner_declarator
&& inner_declarator
->kind
== cdk_id
;
7267 if (ctype
== NULL_TREE
7268 && decl_context
== FIELD
7270 && (friendp
== 0 || dname
== current_class_name
))
7271 ctype
= current_class_type
;
7273 if (ctype
&& sfk
== sfk_conversion
)
7274 TYPE_HAS_CONVERSION (ctype
) = 1;
7275 if (ctype
&& (sfk
== sfk_constructor
7276 || sfk
== sfk_destructor
))
7278 /* We are within a class's scope. If our declarator name
7279 is the same as the class name, and we are defining
7280 a function, then it is a constructor/destructor, and
7281 therefore returns a void type. */
7283 if (flags
== DTOR_FLAG
)
7285 /* ISO C++ 12.4/2. A destructor may not be
7286 declared const or volatile. A destructor may
7289 error ("destructor cannot be static member function");
7292 error ("destructors may not be cv-qualified");
7293 quals
= TYPE_UNQUALIFIED
;
7295 if (decl_context
== FIELD
)
7297 if (! member_function_or_else (ctype
,
7300 return void_type_node
;
7303 else /* It's a constructor. */
7307 /* ISO C++ 12.1. A constructor may not be
7308 declared const or volatile. A constructor may
7309 not be virtual. A constructor may not be
7312 error ("constructor cannot be static member function");
7315 pedwarn ("constructors cannot be declared virtual");
7320 error ("constructors may not be cv-qualified");
7321 quals
= TYPE_UNQUALIFIED
;
7323 if (decl_context
== FIELD
)
7325 if (! member_function_or_else (ctype
,
7328 return void_type_node
;
7329 TYPE_HAS_CONSTRUCTOR (ctype
) = 1;
7330 if (sfk
!= sfk_constructor
)
7334 if (decl_context
== FIELD
)
7340 error ("can't initialize friend function %qs", name
);
7343 /* Cannot be both friend and virtual. */
7344 error ("virtual functions cannot be friends");
7347 if (decl_context
== NORMAL
)
7348 error ("friend declaration not in class definition");
7349 if (current_function_decl
&& funcdef_flag
)
7350 error ("can't define friend function %qs in a local "
7355 arg_types
= grokparms (declarator
->u
.function
.parameters
,
7358 if (inner_declarator
7359 && inner_declarator
->kind
== cdk_id
7360 && inner_declarator
->u
.id
.sfk
== sfk_destructor
7361 && arg_types
!= void_list_node
)
7363 error ("destructors may not have parameters");
7364 arg_types
= void_list_node
;
7368 type
= build_function_type (type
, arg_types
);
7375 /* Filter out pointers-to-references and references-to-references.
7376 We can get these if a TYPE_DECL is used. */
7378 if (TREE_CODE (type
) == REFERENCE_TYPE
)
7380 error (declarator
->kind
== cdk_reference
7381 ? "cannot declare reference to %q#T"
7382 : "cannot declare pointer to %q#T", type
);
7383 type
= TREE_TYPE (type
);
7385 else if (VOID_TYPE_P (type
))
7387 if (declarator
->kind
== cdk_reference
)
7388 error ("cannot declare reference to %q#T", type
);
7389 else if (declarator
->kind
== cdk_ptrmem
)
7390 error ("cannot declare pointer to %q#T member", type
);
7393 /* We now know that the TYPE_QUALS don't apply to the decl,
7394 but to the target of the pointer. */
7395 type_quals
= TYPE_UNQUALIFIED
;
7397 if (declarator
->kind
== cdk_ptrmem
7398 && (TREE_CODE (type
) == FUNCTION_TYPE
7399 || (quals
&& TREE_CODE (type
) == METHOD_TYPE
)))
7401 tree dummy
= build_decl (TYPE_DECL
, NULL_TREE
, type
);
7402 grok_method_quals (declarator
->u
.pointer
.class_type
,
7404 type
= TREE_TYPE (dummy
);
7405 quals
= TYPE_UNQUALIFIED
;
7408 if (declarator
->kind
== cdk_reference
)
7410 if (!VOID_TYPE_P (type
))
7411 type
= build_reference_type (type
);
7413 else if (TREE_CODE (type
) == METHOD_TYPE
)
7414 type
= build_ptrmemfunc_type (build_pointer_type (type
));
7415 else if (declarator
->kind
== cdk_ptrmem
)
7416 type
= build_ptrmem_type (declarator
->u
.pointer
.class_type
,
7419 type
= build_pointer_type (type
);
7421 /* Process a list of type modifier keywords (such as
7422 const or volatile) that were given inside the `*' or `&'. */
7424 if (declarator
->u
.pointer
.qualifiers
)
7427 = cp_build_qualified_type (type
,
7428 declarator
->u
.pointer
.qualifiers
);
7429 type_quals
= cp_type_quals (type
);
7442 if (unqualified_id
&& TREE_CODE (unqualified_id
) == TEMPLATE_ID_EXPR
7443 && TREE_CODE (type
) != FUNCTION_TYPE
7444 && TREE_CODE (type
) != METHOD_TYPE
)
7446 error ("template-id %qD used as a declarator",
7448 unqualified_id
= dname
;
7451 /* If DECLARATOR is non-NULL, we know it is a cdk_id declarator;
7452 otherwise, we would not have exited the loop above. */
7454 && TREE_CODE (declarator
->u
.id
.name
) == SCOPE_REF
7455 /* If the qualifying scope was invalid, it will have been set to
7457 && TREE_OPERAND (declarator
->u
.id
.name
, 0)
7458 && TYPE_P (TREE_OPERAND (declarator
->u
.id
.name
, 0)))
7462 ctype
= TREE_OPERAND (declarator
->u
.id
.name
, 0);
7464 ctype
= TYPE_MAIN_VARIANT (ctype
);
7466 while (t
!= NULL_TREE
&& CLASS_TYPE_P (t
))
7468 /* You're supposed to have one `template <...>' for every
7469 template class, but you don't need one for a full
7470 specialization. For example:
7472 template <class T> struct S{};
7473 template <> struct S<int> { void f(); };
7474 void S<int>::f () {}
7476 is correct; there shouldn't be a `template <>' for the
7477 definition of `S<int>::f'. */
7478 if (CLASSTYPE_TEMPLATE_INFO (t
)
7479 && (CLASSTYPE_TEMPLATE_INSTANTIATION (t
)
7480 || uses_template_parms (CLASSTYPE_TI_ARGS (t
)))
7481 && PRIMARY_TEMPLATE_P (CLASSTYPE_TI_TEMPLATE (t
)))
7482 template_count
+= 1;
7484 t
= TYPE_MAIN_DECL (t
);
7485 t
= DECL_CONTEXT (t
);
7488 if (ctype
== current_class_type
)
7494 Is this ill-formed? */
7497 pedwarn ("extra qualification %<%T::%> on member %qs ignored",
7500 else if (TREE_CODE (type
) == FUNCTION_TYPE
)
7502 tree sname
= TREE_OPERAND (declarator
->u
.id
.name
, 1);
7504 if (TREE_CODE (sname
) == IDENTIFIER_NODE
7505 && NEW_DELETE_OPNAME_P (sname
))
7506 /* Overloaded operator new and operator delete
7507 are always static functions. */
7509 else if (current_class_type
== NULL_TREE
|| friendp
)
7511 = build_method_type_directly (ctype
,
7513 TYPE_ARG_TYPES (type
));
7516 error ("cannot declare member function %<%T::%s%> within %<%T%>",
7517 ctype
, name
, current_class_type
);
7518 return error_mark_node
;
7521 else if (declspecs
->specs
[(int)ds_typedef
]
7522 || COMPLETE_TYPE_P (complete_type (ctype
)))
7524 /* Have to move this code elsewhere in this function.
7525 this code is used for i.e., typedef int A::M; M *pm;
7527 It is? How? jason 10/2/94 */
7529 if (current_class_type
)
7531 error ("cannot declare member %<%T::%s%> within %qT",
7532 ctype
, name
, current_class_type
);
7533 return void_type_node
;
7538 cxx_incomplete_type_error (NULL_TREE
, ctype
);
7539 return error_mark_node
;
7546 *attrlist
= chainon (returned_attrs
, *attrlist
);
7548 attrlist
= &returned_attrs
;
7551 /* Now TYPE has the actual type. */
7553 /* Did array size calculations overflow? */
7555 if (TREE_CODE (type
) == ARRAY_TYPE
7556 && COMPLETE_TYPE_P (type
)
7557 && TREE_OVERFLOW (TYPE_SIZE (type
)))
7559 error ("size of array %qs is too large", name
);
7560 /* If we proceed with the array type as it is, we'll eventually
7561 crash in tree_low_cst(). */
7562 type
= error_mark_node
;
7565 if ((decl_context
== FIELD
|| decl_context
== PARM
)
7566 && !processing_template_decl
7567 && variably_modified_type_p (type
, NULL_TREE
))
7569 if (decl_context
== FIELD
)
7570 error ("data member may not have variably modified type %qT", type
);
7572 error ("parameter may not have variably modified type %qT", type
);
7573 type
= error_mark_node
;
7576 if (explicitp
== 1 || (explicitp
&& friendp
))
7578 /* [dcl.fct.spec] The explicit specifier shall only be used in
7579 declarations of constructors within a class definition. */
7580 error ("only declarations of constructors can be %<explicit%>");
7584 if (storage_class
== sc_mutable
)
7586 if (decl_context
!= FIELD
|| friendp
)
7588 error ("non-member %qs cannot be declared %<mutable%>", name
);
7589 storage_class
= sc_none
;
7591 else if (decl_context
== TYPENAME
|| declspecs
->specs
[(int)ds_typedef
])
7593 error ("non-object member %qs cannot be declared %<mutable%>", name
);
7594 storage_class
= sc_none
;
7596 else if (TREE_CODE (type
) == FUNCTION_TYPE
7597 || TREE_CODE (type
) == METHOD_TYPE
)
7599 error ("function %qs cannot be declared %<mutable%>", name
);
7600 storage_class
= sc_none
;
7604 error ("static %qs cannot be declared %<mutable%>", name
);
7605 storage_class
= sc_none
;
7607 else if (type_quals
& TYPE_QUAL_CONST
)
7609 error ("const %qs cannot be declared %<mutable%>", name
);
7610 storage_class
= sc_none
;
7614 /* If this is declaring a typedef name, return a TYPE_DECL. */
7615 if (declspecs
->specs
[(int)ds_typedef
] && decl_context
!= TYPENAME
)
7619 /* Note that the grammar rejects storage classes
7620 in typenames, fields or parameters. */
7621 if (current_lang_name
== lang_name_java
)
7622 TYPE_FOR_JAVA (type
) = 1;
7624 if (decl_context
== FIELD
)
7626 if (constructor_name_p (unqualified_id
, current_class_type
))
7627 pedwarn ("ISO C++ forbids nested type %qD with same name "
7628 "as enclosing class",
7630 decl
= build_lang_decl (TYPE_DECL
, unqualified_id
, type
);
7634 decl
= build_decl (TYPE_DECL
, unqualified_id
, type
);
7635 if (in_namespace
|| ctype
)
7636 error ("%Jtypedef name may not be a nested-name-specifier", decl
);
7637 if (!current_function_decl
)
7638 DECL_CONTEXT (decl
) = FROB_CONTEXT (current_namespace
);
7639 else if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (current_function_decl
)
7640 || (DECL_MAYBE_IN_CHARGE_DESTRUCTOR_P
7641 (current_function_decl
)))
7642 /* The TYPE_DECL is "abstract" because there will be
7643 clones of this constructor/destructor, and there will
7644 be copies of this TYPE_DECL generated in those
7646 DECL_ABSTRACT (decl
) = 1;
7649 /* If the user declares "typedef struct {...} foo" then the
7650 struct will have an anonymous name. Fill that name in now.
7651 Nothing can refer to it, so nothing needs know about the name
7653 if (type
!= error_mark_node
7656 && TREE_CODE (TYPE_NAME (type
)) == TYPE_DECL
7657 && TYPE_ANONYMOUS_P (type
)
7658 /* Don't do this if there are attributes. */
7659 && (!attrlist
|| !*attrlist
)
7660 && cp_type_quals (type
) == TYPE_UNQUALIFIED
)
7662 tree oldname
= TYPE_NAME (type
);
7665 /* Replace the anonymous name with the real name everywhere. */
7666 lookup_tag_reverse (type
, unqualified_id
);
7667 for (t
= TYPE_MAIN_VARIANT (type
); t
; t
= TYPE_NEXT_VARIANT (t
))
7668 if (TYPE_NAME (t
) == oldname
)
7669 TYPE_NAME (t
) = decl
;
7671 if (TYPE_LANG_SPECIFIC (type
))
7672 TYPE_WAS_ANONYMOUS (type
) = 1;
7674 /* If this is a typedef within a template class, the nested
7675 type is a (non-primary) template. The name for the
7676 template needs updating as well. */
7677 if (TYPE_LANG_SPECIFIC (type
) && CLASSTYPE_TEMPLATE_INFO (type
))
7678 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type
))
7679 = TYPE_IDENTIFIER (type
);
7681 /* FIXME remangle member functions; member functions of a
7682 type with external linkage have external linkage. */
7687 if (ctype
== NULL_TREE
)
7689 if (TREE_CODE (type
) != METHOD_TYPE
)
7690 error ("%Jinvalid type qualifier for non-member function type",
7693 ctype
= TYPE_METHOD_BASETYPE (type
);
7695 if (ctype
!= NULL_TREE
)
7696 grok_method_quals (ctype
, decl
, quals
);
7700 || (typedef_decl
&& C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl
)))
7701 C_TYPEDEF_EXPLICITLY_SIGNED (decl
) = 1;
7703 bad_specifiers (decl
, "type", virtualp
, quals
!= TYPE_UNQUALIFIED
,
7704 inlinep
, friendp
, raises
!= NULL_TREE
);
7709 /* Detect the case of an array type of unspecified size
7710 which came, as such, direct from a typedef name.
7711 We must copy the type, so that the array's domain can be
7712 individually set by the object's initializer. */
7714 if (type
&& typedef_type
7715 && TREE_CODE (type
) == ARRAY_TYPE
&& !TYPE_DOMAIN (type
)
7716 && TYPE_MAIN_VARIANT (type
) == TYPE_MAIN_VARIANT (typedef_type
))
7717 type
= build_cplus_array_type (TREE_TYPE (type
), NULL_TREE
);
7719 /* Detect where we're using a typedef of function type to declare a
7720 function. PARMS will not be set, so we must create it now. */
7722 if (type
== typedef_type
&& TREE_CODE (type
) == FUNCTION_TYPE
)
7724 tree decls
= NULL_TREE
;
7727 for (args
= TYPE_ARG_TYPES (type
); args
; args
= TREE_CHAIN (args
))
7729 tree decl
= cp_build_parm_decl (NULL_TREE
, TREE_VALUE (args
));
7731 TREE_CHAIN (decl
) = decls
;
7735 parms
= nreverse (decls
);
7738 /* If this is a type name (such as, in a cast or sizeof),
7739 compute the type and return it now. */
7741 if (decl_context
== TYPENAME
)
7743 /* Note that the grammar rejects storage classes
7744 in typenames, fields or parameters. */
7745 if (type_quals
!= TYPE_UNQUALIFIED
)
7746 type_quals
= TYPE_UNQUALIFIED
;
7748 /* Special case: "friend class foo" looks like a TYPENAME context. */
7751 if (type_quals
!= TYPE_UNQUALIFIED
)
7753 error ("type qualifiers specified for friend class declaration");
7754 type_quals
= TYPE_UNQUALIFIED
;
7758 error ("%<inline%> specified for friend class declaration");
7764 /* Don't allow friend declaration without a class-key. */
7765 if (TREE_CODE (type
) == TEMPLATE_TYPE_PARM
)
7766 pedwarn ("template parameters cannot be friends");
7767 else if (TREE_CODE (type
) == TYPENAME_TYPE
)
7768 pedwarn ("friend declaration requires class-key, "
7769 "i.e. %<friend class %T::%D%>",
7770 TYPE_CONTEXT (type
), TYPENAME_TYPE_FULLNAME (type
));
7772 pedwarn ("friend declaration requires class-key, "
7773 "i.e. %<friend %#T%>",
7777 /* Only try to do this stuff if we didn't already give up. */
7778 if (type
!= integer_type_node
)
7780 /* A friendly class? */
7781 if (current_class_type
)
7782 make_friend_class (current_class_type
, TYPE_MAIN_VARIANT (type
),
7785 error ("trying to make class %qT a friend of global scope",
7788 type
= void_type_node
;
7793 if (ctype
== NULL_TREE
)
7795 if (TREE_CODE (type
) != METHOD_TYPE
)
7796 error ("invalid qualifiers on non-member function type");
7798 ctype
= TYPE_METHOD_BASETYPE (type
);
7802 tree dummy
= build_decl (TYPE_DECL
, unqualified_id
, type
);
7803 grok_method_quals (ctype
, dummy
, quals
);
7804 type
= TREE_TYPE (dummy
);
7810 else if (unqualified_id
== NULL_TREE
&& decl_context
!= PARM
7811 && decl_context
!= CATCHPARM
7812 && TREE_CODE (type
) != UNION_TYPE
7815 error ("abstract declarator %qT used as declaration", type
);
7816 return error_mark_node
;
7819 /* Only functions may be declared using an operator-function-id. */
7821 && IDENTIFIER_OPNAME_P (unqualified_id
)
7822 && TREE_CODE (type
) != FUNCTION_TYPE
7823 && TREE_CODE (type
) != METHOD_TYPE
)
7825 error ("declaration of %qD as non-function", unqualified_id
);
7826 return error_mark_node
;
7829 /* We don't check parameter types here because we can emit a better
7830 error message later. */
7831 if (decl_context
!= PARM
)
7832 type
= check_var_type (unqualified_id
, type
);
7834 /* Now create the decl, which may be a VAR_DECL, a PARM_DECL
7835 or a FUNCTION_DECL, depending on DECL_CONTEXT and TYPE. */
7837 if (decl_context
== PARM
|| decl_context
== CATCHPARM
)
7839 if (ctype
|| in_namespace
)
7840 error ("cannot use %<::%> in parameter declaration");
7842 /* A parameter declared as an array of T is really a pointer to T.
7843 One declared as a function is really a pointer to a function.
7844 One declared as a member is really a pointer to member. */
7846 if (TREE_CODE (type
) == ARRAY_TYPE
)
7848 /* Transfer const-ness of array into that of type pointed to. */
7849 type
= build_pointer_type (TREE_TYPE (type
));
7850 type_quals
= TYPE_UNQUALIFIED
;
7852 else if (TREE_CODE (type
) == FUNCTION_TYPE
)
7853 type
= build_pointer_type (type
);
7859 if (decl_context
== PARM
)
7861 decl
= cp_build_parm_decl (unqualified_id
, type
);
7863 bad_specifiers (decl
, "parameter", virtualp
, quals
!= TYPE_UNQUALIFIED
,
7864 inlinep
, friendp
, raises
!= NULL_TREE
);
7866 else if (decl_context
== FIELD
)
7868 /* The C99 flexible array extension. */
7869 if (!staticp
&& TREE_CODE (type
) == ARRAY_TYPE
7870 && TYPE_DOMAIN (type
) == NULL_TREE
)
7872 tree itype
= compute_array_index_type (dname
, integer_zero_node
);
7873 type
= build_cplus_array_type (TREE_TYPE (type
), itype
);
7876 if (type
== error_mark_node
)
7878 /* Happens when declaring arrays of sizes which
7879 are error_mark_node, for example. */
7882 else if (in_namespace
&& !friendp
)
7884 /* Something like struct S { int N::j; }; */
7885 error ("invalid use of %<::%>");
7888 else if (TREE_CODE (type
) == FUNCTION_TYPE
)
7891 tree function_context
;
7893 /* We catch the others as conflicts with the builtin
7895 if (friendp
&& unqualified_id
== ridpointers
[(int) RID_SIGNED
])
7897 error ("function %qD cannot be declared friend",
7904 if (ctype
== NULL_TREE
)
7905 ctype
= current_class_type
;
7907 if (ctype
== NULL_TREE
)
7909 error ("can't make %qD into a method -- not in a class",
7911 return void_type_node
;
7914 /* ``A union may [ ... ] not [ have ] virtual functions.''
7916 if (virtualp
&& TREE_CODE (ctype
) == UNION_TYPE
)
7918 error ("function %qD declared virtual inside a union",
7920 return void_type_node
;
7923 if (NEW_DELETE_OPNAME_P (unqualified_id
))
7927 error ("%qD cannot be declared virtual, since it "
7933 else if (staticp
< 2)
7934 type
= build_method_type_directly (ctype
,
7936 TYPE_ARG_TYPES (type
));
7939 /* Tell grokfndecl if it needs to set TREE_PUBLIC on the node. */
7940 function_context
= (ctype
!= NULL_TREE
) ?
7941 decl_function_context (TYPE_MAIN_DECL (ctype
)) : NULL_TREE
;
7942 publicp
= (! friendp
|| ! staticp
)
7943 && function_context
== NULL_TREE
;
7944 decl
= grokfndecl (ctype
, type
,
7945 TREE_CODE (unqualified_id
) != TEMPLATE_ID_EXPR
7946 ? unqualified_id
: dname
,
7949 virtualp
, flags
, quals
, raises
,
7950 friendp
? -1 : 0, friendp
, publicp
, inlinep
,
7951 funcdef_flag
, template_count
, in_namespace
, attrlist
);
7952 if (decl
== NULL_TREE
)
7955 /* This clobbers the attrs stored in `decl' from `attrlist'. */
7956 /* The decl and setting of decl_attr is also turned off. */
7957 decl
= build_decl_attribute_variant (decl
, decl_attr
);
7960 /* [class.conv.ctor]
7962 A constructor declared without the function-specifier
7963 explicit that can be called with a single parameter
7964 specifies a conversion from the type of its first
7965 parameter to the type of its class. Such a constructor
7966 is called a converting constructor. */
7968 DECL_NONCONVERTING_P (decl
) = 1;
7969 else if (DECL_CONSTRUCTOR_P (decl
))
7971 /* The constructor can be called with exactly one
7972 parameter if there is at least one parameter, and
7973 any subsequent parameters have default arguments.
7974 Ignore any compiler-added parms. */
7975 tree arg_types
= FUNCTION_FIRST_USER_PARMTYPE (decl
);
7977 if (arg_types
== void_list_node
7979 && TREE_CHAIN (arg_types
)
7980 && TREE_CHAIN (arg_types
) != void_list_node
7981 && !TREE_PURPOSE (TREE_CHAIN (arg_types
))))
7982 DECL_NONCONVERTING_P (decl
) = 1;
7985 else if (TREE_CODE (type
) == METHOD_TYPE
)
7987 /* We only get here for friend declarations of
7988 members of other classes. */
7989 /* All method decls are public, so tell grokfndecl to set
7990 TREE_PUBLIC, also. */
7991 decl
= grokfndecl (ctype
, type
,
7992 TREE_CODE (unqualified_id
) != TEMPLATE_ID_EXPR
7993 ? unqualified_id
: dname
,
7996 virtualp
, flags
, quals
, raises
,
7997 friendp
? -1 : 0, friendp
, 1, 0, funcdef_flag
,
7998 template_count
, in_namespace
, attrlist
);
7999 if (decl
== NULL_TREE
)
8002 else if (!staticp
&& !dependent_type_p (type
)
8003 && !COMPLETE_TYPE_P (complete_type (type
))
8004 && (TREE_CODE (type
) != ARRAY_TYPE
|| initialized
== 0))
8007 error ("field %qD has incomplete type", unqualified_id
);
8009 error ("name %qT has incomplete type", type
);
8011 /* If we're instantiating a template, tell them which
8012 instantiation made the field's type be incomplete. */
8013 if (current_class_type
8014 && TYPE_NAME (current_class_type
)
8015 && IDENTIFIER_TEMPLATE (TYPE_IDENTIFIER (current_class_type
))
8017 && declspecs
->type
== type
)
8018 error (" in instantiation of template %qT",
8019 current_class_type
);
8021 type
= error_mark_node
;
8028 error ("%qE is neither function nor member function; "
8029 "cannot be declared friend", unqualified_id
);
8037 /* Friends are treated specially. */
8038 if (ctype
== current_class_type
)
8039 warning ("member functions are implicitly friends of their class");
8040 else if (decl
&& DECL_NAME (decl
))
8042 if (template_class_depth (current_class_type
) == 0)
8044 decl
= check_explicit_specialization
8045 (unqualified_id
, decl
, template_count
,
8046 2 * (funcdef_flag
!= 0) + 4);
8047 if (decl
== error_mark_node
)
8048 return error_mark_node
;
8051 decl
= do_friend (ctype
, unqualified_id
, decl
,
8052 *attrlist
, flags
, quals
, funcdef_flag
);
8056 return void_type_node
;
8059 /* Structure field. It may not be a function, except for C++. */
8061 if (decl
== NULL_TREE
)
8067 /* An attempt is being made to initialize a non-static
8068 member. But, from [class.mem]:
8070 4 A member-declarator can contain a
8071 constant-initializer only if it declares a static
8072 member (_class.static_) of integral or enumeration
8073 type, see _class.static.data_.
8075 This used to be relatively common practice, but
8076 the rest of the compiler does not correctly
8077 handle the initialization unless the member is
8078 static so we make it static below. */
8079 pedwarn ("ISO C++ forbids initialization of member %qD",
8081 pedwarn ("making %qD static", unqualified_id
);
8085 if (uses_template_parms (type
))
8086 /* We'll check at instantiation time. */
8088 else if (check_static_variable_definition (unqualified_id
,
8090 /* If we just return the declaration, crashes
8091 will sometimes occur. We therefore return
8092 void_type_node, as if this was a friend
8093 declaration, to cause callers to completely
8094 ignore this declaration. */
8095 return void_type_node
;
8100 /* C++ allows static class members. All other work
8101 for this is done by grokfield. */
8102 decl
= build_lang_decl (VAR_DECL
, unqualified_id
, type
);
8103 set_linkage_for_static_data_member (decl
);
8104 /* Even if there is an in-class initialization, DECL
8105 is considered undefined until an out-of-class
8106 definition is provided. */
8107 DECL_EXTERNAL (decl
) = 1;
8111 decl
= build_decl (FIELD_DECL
, unqualified_id
, type
);
8112 DECL_NONADDRESSABLE_P (decl
) = bitfield
;
8113 if (storage_class
== sc_mutable
)
8115 DECL_MUTABLE_P (decl
) = 1;
8116 storage_class
= sc_none
;
8120 bad_specifiers (decl
, "field", virtualp
, quals
!= TYPE_UNQUALIFIED
,
8121 inlinep
, friendp
, raises
!= NULL_TREE
);
8124 else if (TREE_CODE (type
) == FUNCTION_TYPE
8125 || TREE_CODE (type
) == METHOD_TYPE
)
8130 if (!unqualified_id
)
8133 if (TREE_CODE (unqualified_id
) == TEMPLATE_ID_EXPR
)
8134 original_name
= dname
;
8136 original_name
= unqualified_id
;
8138 if (storage_class
== sc_auto
)
8139 error ("storage class %<auto%> invalid for function %qs", name
);
8140 else if (storage_class
== sc_register
)
8141 error ("storage class %<register%> invalid for function %qs", name
);
8143 error ("storage class %<__thread%> invalid for function %qs", name
);
8145 /* Function declaration not at top level.
8146 Storage classes other than `extern' are not allowed
8147 and `extern' makes no difference. */
8148 if (! toplevel_bindings_p ()
8149 && (storage_class
== sc_static
8150 || declspecs
->specs
[(int)ds_inline
])
8153 if (storage_class
== sc_static
)
8154 pedwarn ("%<static%> specified invalid for function %qs "
8155 "declared out of global scope", name
);
8157 pedwarn ("%<inline%> specifier invalid for function %qs "
8158 "declared out of global scope", name
);
8161 if (ctype
== NULL_TREE
)
8165 error ("virtual non-class function %qs", name
);
8169 else if (TREE_CODE (type
) == FUNCTION_TYPE
&& staticp
< 2
8170 && !NEW_DELETE_OPNAME_P (original_name
))
8171 type
= build_method_type_directly (ctype
,
8173 TYPE_ARG_TYPES (type
));
8175 /* Record presence of `static'. */
8176 publicp
= (ctype
!= NULL_TREE
8177 || storage_class
== sc_extern
8178 || storage_class
!= sc_static
);
8180 decl
= grokfndecl (ctype
, type
, original_name
, parms
, unqualified_id
,
8181 virtualp
, flags
, quals
, raises
,
8183 publicp
, inlinep
, funcdef_flag
,
8184 template_count
, in_namespace
, attrlist
);
8185 if (decl
== NULL_TREE
)
8190 int invalid_static
= 0;
8192 /* Don't allow a static member function in a class, and forbid
8193 declaring main to be static. */
8194 if (TREE_CODE (type
) == METHOD_TYPE
)
8196 pedwarn ("cannot declare member function %qD to have "
8197 "static linkage", decl
);
8200 else if (current_function_decl
)
8202 /* FIXME need arm citation */
8203 error ("cannot declare static function inside another function");
8210 storage_class
= sc_none
;
8216 /* It's a variable. */
8218 /* An uninitialized decl with `extern' is a reference. */
8219 decl
= grokvardecl (type
, unqualified_id
,
8222 (type_quals
& TYPE_QUAL_CONST
) != 0,
8223 ctype
? ctype
: in_namespace
);
8224 bad_specifiers (decl
, "variable", virtualp
, quals
!= TYPE_UNQUALIFIED
,
8225 inlinep
, friendp
, raises
!= NULL_TREE
);
8229 DECL_CONTEXT (decl
) = ctype
;
8232 pedwarn ("%<static%> may not be used when defining "
8233 "(as opposed to declaring) a static data member");
8235 storage_class
= sc_none
;
8237 if (storage_class
== sc_register
&& TREE_STATIC (decl
))
8239 error ("static member %qD declared %<register%>", decl
);
8240 storage_class
= sc_none
;
8242 if (storage_class
== sc_extern
&& pedantic
)
8244 pedwarn ("cannot explicitly declare member %q#D to have "
8247 storage_class
= sc_none
;
8252 /* Record `register' declaration for warnings on &
8253 and in case doing stupid register allocation. */
8255 if (storage_class
== sc_register
)
8256 DECL_REGISTER (decl
) = 1;
8257 else if (storage_class
== sc_extern
)
8258 DECL_THIS_EXTERN (decl
) = 1;
8259 else if (storage_class
== sc_static
)
8260 DECL_THIS_STATIC (decl
) = 1;
8262 /* Record constancy and volatility. There's no need to do this
8263 when processing a template; we'll do this for the instantiated
8264 declaration based on the type of DECL. */
8265 if (!processing_template_decl
)
8266 c_apply_type_quals_to_decl (type_quals
, decl
);
8272 /* Subroutine of start_function. Ensure that each of the parameter
8273 types (as listed in PARMS) is complete, as is required for a
8274 function definition. */
8277 require_complete_types_for_parms (tree parms
)
8279 for (; parms
; parms
= TREE_CHAIN (parms
))
8281 if (dependent_type_p (TREE_TYPE (parms
)))
8283 if (VOID_TYPE_P (TREE_TYPE (parms
)))
8284 /* grokparms will have already issued an error. */
8285 TREE_TYPE (parms
) = error_mark_node
;
8286 else if (complete_type_or_else (TREE_TYPE (parms
), parms
))
8288 layout_decl (parms
, 0);
8289 DECL_ARG_TYPE (parms
) = type_passed_as (TREE_TYPE (parms
));
8294 /* Returns nonzero if T is a local variable. */
8297 local_variable_p (tree t
)
8299 if ((TREE_CODE (t
) == VAR_DECL
8300 /* A VAR_DECL with a context that is a _TYPE is a static data
8302 && !TYPE_P (CP_DECL_CONTEXT (t
))
8303 /* Any other non-local variable must be at namespace scope. */
8304 && !DECL_NAMESPACE_SCOPE_P (t
))
8305 || (TREE_CODE (t
) == PARM_DECL
))
8311 /* Returns nonzero if T is an automatic local variable or a label.
8312 (These are the declarations that need to be remapped when the code
8313 containing them is duplicated.) */
8316 nonstatic_local_decl_p (tree t
)
8318 return ((local_variable_p (t
) && !TREE_STATIC (t
))
8319 || TREE_CODE (t
) == LABEL_DECL
8320 || TREE_CODE (t
) == RESULT_DECL
);
8323 /* Like local_variable_p, but suitable for use as a tree-walking
8327 local_variable_p_walkfn (tree
*tp
, int *walk_subtrees
,
8328 void *data ATTRIBUTE_UNUSED
)
8330 if (local_variable_p (*tp
) && !DECL_ARTIFICIAL (*tp
))
8332 else if (TYPE_P (*tp
))
8339 /* Check that ARG, which is a default-argument expression for a
8340 parameter DECL, is valid. Returns ARG, or ERROR_MARK_NODE, if
8341 something goes wrong. DECL may also be a _TYPE node, rather than a
8342 DECL, if there is no DECL available. */
8345 check_default_argument (tree decl
, tree arg
)
8350 if (TREE_CODE (arg
) == DEFAULT_ARG
)
8351 /* We get a DEFAULT_ARG when looking at an in-class declaration
8352 with a default argument. Ignore the argument for now; we'll
8353 deal with it after the class is complete. */
8356 if (processing_template_decl
|| uses_template_parms (arg
))
8357 /* We don't do anything checking until instantiation-time. Note
8358 that there may be uninstantiated arguments even for an
8359 instantiated function, since default arguments are not
8360 instantiated until they are needed. */
8369 decl_type
= TREE_TYPE (decl
);
8371 if (arg
== error_mark_node
8372 || decl
== error_mark_node
8373 || TREE_TYPE (arg
) == error_mark_node
8374 || decl_type
== error_mark_node
)
8375 /* Something already went wrong. There's no need to check
8377 return error_mark_node
;
8379 /* [dcl.fct.default]
8381 A default argument expression is implicitly converted to the
8383 if (!TREE_TYPE (arg
)
8384 || !can_convert_arg (decl_type
, TREE_TYPE (arg
), arg
))
8387 error ("default argument for %q#D has type %qT",
8388 decl
, TREE_TYPE (arg
));
8390 error ("default argument for parameter of type %qT has type %qT",
8391 decl_type
, TREE_TYPE (arg
));
8393 return error_mark_node
;
8396 /* [dcl.fct.default]
8398 Local variables shall not be used in default argument
8401 The keyword `this' shall not be used in a default argument of a
8403 var
= walk_tree_without_duplicates (&arg
, local_variable_p_walkfn
,
8407 error ("default argument %qE uses local variable %qD", arg
, var
);
8408 return error_mark_node
;
8415 /* Decode the list of parameter types for a function type.
8416 Given the list of things declared inside the parens,
8417 return a list of types.
8419 If this parameter does not end with an ellipsis, we append
8422 *PARMS is set to the chain of PARM_DECLs created. */
8425 grokparms (cp_parameter_declarator
*first_parm
, tree
*parms
)
8427 tree result
= NULL_TREE
;
8428 tree decls
= NULL_TREE
;
8429 int ellipsis
= !first_parm
|| first_parm
->ellipsis_p
;
8430 cp_parameter_declarator
*parm
;
8433 for (parm
= first_parm
; parm
!= NULL
; parm
= parm
->next
)
8435 tree type
= NULL_TREE
;
8436 tree init
= parm
->default_argument
;
8440 if (parm
== no_parameters
)
8443 attrs
= parm
->decl_specifiers
.attributes
;
8444 parm
->decl_specifiers
.attributes
= NULL_TREE
;
8445 decl
= grokdeclarator (parm
->declarator
, &parm
->decl_specifiers
,
8446 PARM
, init
!= NULL_TREE
, &attrs
);
8447 if (! decl
|| TREE_TYPE (decl
) == error_mark_node
)
8451 cplus_decl_attributes (&decl
, attrs
, 0);
8453 type
= TREE_TYPE (decl
);
8454 if (VOID_TYPE_P (type
))
8456 if (same_type_p (type
, void_type_node
)
8457 && !DECL_NAME (decl
) && !result
&& !parm
->next
&& !ellipsis
)
8458 /* this is a parmlist of `(void)', which is ok. */
8460 cxx_incomplete_type_error (decl
, type
);
8461 /* It's not a good idea to actually create parameters of
8462 type `void'; other parts of the compiler assume that a
8463 void type terminates the parameter list. */
8464 type
= error_mark_node
;
8465 TREE_TYPE (decl
) = error_mark_node
;
8468 if (type
!= error_mark_node
)
8470 /* Top-level qualifiers on the parameters are
8471 ignored for function types. */
8472 type
= cp_build_qualified_type (type
, 0);
8473 if (TREE_CODE (type
) == METHOD_TYPE
)
8475 error ("parameter %qD invalidly declared method type", decl
);
8476 type
= build_pointer_type (type
);
8477 TREE_TYPE (decl
) = type
;
8479 else if (abstract_virtuals_error (decl
, type
))
8480 any_error
= 1; /* Seems like a good idea. */
8481 else if (POINTER_TYPE_P (type
))
8483 /* [dcl.fct]/6, parameter types cannot contain pointers
8484 (references) to arrays of unknown bound. */
8485 tree t
= TREE_TYPE (type
);
8486 int ptr
= TYPE_PTR_P (type
);
8492 else if (TREE_CODE (t
) != ARRAY_TYPE
)
8494 else if (!TYPE_DOMAIN (t
))
8498 if (TREE_CODE (t
) == ARRAY_TYPE
)
8499 error ("parameter %qD includes %s to array of unknown "
8501 decl
, ptr
? "pointer" : "reference", t
);
8504 if (!any_error
&& init
)
8505 init
= check_default_argument (decl
, init
);
8510 TREE_CHAIN (decl
) = decls
;
8512 result
= tree_cons (init
, type
, result
);
8514 decls
= nreverse (decls
);
8515 result
= nreverse (result
);
8517 result
= chainon (result
, void_list_node
);
8524 /* D is a constructor or overloaded `operator='.
8526 Let T be the class in which D is declared. Then, this function
8529 -1 if D's is an ill-formed constructor or copy assignment operator
8530 whose first parameter is of type `T'.
8531 0 if D is not a copy constructor or copy assignment
8533 1 if D is a copy constructor or copy assignment operator whose
8534 first parameter is a reference to const qualified T.
8535 2 if D is a copy constructor or copy assignment operator whose
8536 first parameter is a reference to non-const qualified T.
8538 This function can be used as a predicate. Positive values indicate
8539 a copy constructor and nonzero values indicate a copy assignment
8549 gcc_assert (DECL_FUNCTION_MEMBER_P (d
));
8551 if (DECL_TEMPLATE_INFO (d
)
8552 && DECL_MEMBER_TEMPLATE_P (DECL_TI_TEMPLATE (d
)))
8553 /* Instantiations of template member functions are never copy
8554 functions. Note that member functions of templated classes are
8555 represented as template functions internally, and we must
8556 accept those as copy functions. */
8559 args
= FUNCTION_FIRST_USER_PARMTYPE (d
);
8563 arg_type
= TREE_VALUE (args
);
8565 if (TYPE_MAIN_VARIANT (arg_type
) == DECL_CONTEXT (d
))
8567 /* Pass by value copy assignment operator. */
8570 else if (TREE_CODE (arg_type
) == REFERENCE_TYPE
8571 && TYPE_MAIN_VARIANT (TREE_TYPE (arg_type
)) == DECL_CONTEXT (d
))
8573 if (CP_TYPE_CONST_P (TREE_TYPE (arg_type
)))
8579 args
= TREE_CHAIN (args
);
8581 if (args
&& args
!= void_list_node
&& !TREE_PURPOSE (args
))
8582 /* There are more non-optional args. */
8588 /* Remember any special properties of member function DECL. */
8590 void grok_special_member_properties (tree decl
)
8592 if (!DECL_NONSTATIC_MEMBER_FUNCTION_P(decl
))
8593 ; /* Not special. */
8594 else if (DECL_CONSTRUCTOR_P (decl
))
8596 int ctor
= copy_fn_p (decl
);
8602 A non-template constructor for class X is a copy
8603 constructor if its first parameter is of type X&, const
8604 X&, volatile X& or const volatile X&, and either there
8605 are no other parameters or else all other parameters have
8606 default arguments. */
8607 TYPE_HAS_INIT_REF (DECL_CONTEXT (decl
)) = 1;
8609 TYPE_HAS_CONST_INIT_REF (DECL_CONTEXT (decl
)) = 1;
8611 else if (sufficient_parms_p (FUNCTION_FIRST_USER_PARMTYPE (decl
)))
8612 TYPE_HAS_DEFAULT_CONSTRUCTOR (DECL_CONTEXT (decl
)) = 1;
8614 else if (DECL_OVERLOADED_OPERATOR_P (decl
) == NOP_EXPR
)
8618 A non-template assignment operator for class X is a copy
8619 assignment operator if its parameter is of type X, X&, const
8620 X&, volatile X& or const volatile X&. */
8622 int assop
= copy_fn_p (decl
);
8626 TYPE_HAS_ASSIGN_REF (DECL_CONTEXT (decl
)) = 1;
8628 TYPE_HAS_CONST_ASSIGN_REF (DECL_CONTEXT (decl
)) = 1;
8633 /* Check a constructor DECL has the correct form. Complains
8634 if the class has a constructor of the form X(X). */
8637 grok_ctor_properties (tree ctype
, tree decl
)
8639 int ctor_parm
= copy_fn_p (decl
);
8645 A declaration of a constructor for a class X is ill-formed if
8646 its first parameter is of type (optionally cv-qualified) X
8647 and either there are no other parameters or else all other
8648 parameters have default arguments.
8650 We *don't* complain about member template instantiations that
8651 have this form, though; they can occur as we try to decide
8652 what constructor to use during overload resolution. Since
8653 overload resolution will never prefer such a constructor to
8654 the non-template copy constructor (which is either explicitly
8655 or implicitly defined), there's no need to worry about their
8656 existence. Theoretically, they should never even be
8657 instantiated, but that's hard to forestall. */
8658 error ("invalid constructor; you probably meant %<%T (const %T&)%>",
8666 /* An operator with this code is unary, but can also be binary. */
8669 ambi_op_p (enum tree_code code
)
8671 return (code
== INDIRECT_REF
8672 || code
== ADDR_EXPR
8673 || code
== CONVERT_EXPR
8674 || code
== NEGATE_EXPR
8675 || code
== PREINCREMENT_EXPR
8676 || code
== PREDECREMENT_EXPR
);
8679 /* An operator with this name can only be unary. */
8682 unary_op_p (enum tree_code code
)
8684 return (code
== TRUTH_NOT_EXPR
8685 || code
== BIT_NOT_EXPR
8686 || code
== COMPONENT_REF
8687 || code
== TYPE_EXPR
);
8690 /* DECL is a declaration for an overloaded operator. Returns true if
8691 the declaration is valid; false otherwise. If COMPLAIN is true,
8692 errors are issued for invalid declarations. */
8695 grok_op_properties (tree decl
, int friendp
, bool complain
)
8697 tree argtypes
= TYPE_ARG_TYPES (TREE_TYPE (decl
));
8699 int methodp
= (TREE_CODE (TREE_TYPE (decl
)) == METHOD_TYPE
);
8700 tree name
= DECL_NAME (decl
);
8701 enum tree_code operator_code
;
8705 /* Assume that the declaration is valid. */
8708 /* Count the number of arguments. */
8709 for (argtype
= argtypes
, arity
= 0;
8710 argtype
&& argtype
!= void_list_node
;
8711 argtype
= TREE_CHAIN (argtype
))
8714 if (current_class_type
== NULL_TREE
)
8717 if (DECL_CONV_FN_P (decl
))
8718 operator_code
= TYPE_EXPR
;
8722 #define DEF_OPERATOR(NAME, CODE, MANGLING, ARITY, ASSN_P) \
8723 if (ansi_opname (CODE) == name) \
8725 operator_code = (CODE); \
8728 else if (ansi_assopname (CODE) == name) \
8730 operator_code = (CODE); \
8731 DECL_ASSIGNMENT_OPERATOR_P (decl) = 1; \
8735 #include "operators.def"
8741 gcc_assert (operator_code
!= LAST_CPLUS_TREE_CODE
);
8742 SET_OVERLOADED_OPERATOR_CODE (decl
, operator_code
);
8746 switch (operator_code
)
8749 TYPE_HAS_NEW_OPERATOR (current_class_type
) = 1;
8753 TYPE_GETS_DELETE (current_class_type
) |= 1;
8757 TYPE_HAS_ARRAY_NEW_OPERATOR (current_class_type
) = 1;
8760 case VEC_DELETE_EXPR
:
8761 TYPE_GETS_DELETE (current_class_type
) |= 2;
8769 /* [basic.std.dynamic.allocation]/1:
8771 A program is ill-formed if an allocation function is declared
8772 in a namespace scope other than global scope or declared static
8775 The same also holds true for deallocation functions. */
8776 if (operator_code
== NEW_EXPR
|| operator_code
== VEC_NEW_EXPR
8777 || operator_code
== DELETE_EXPR
|| operator_code
== VEC_DELETE_EXPR
)
8779 if (DECL_NAMESPACE_SCOPE_P (decl
))
8781 if (CP_DECL_CONTEXT (decl
) != global_namespace
)
8782 error ("%qD may not be declared within a namespace", decl
);
8783 else if (!TREE_PUBLIC (decl
))
8784 error ("%qD may not be declared as static", decl
);
8788 if (operator_code
== NEW_EXPR
|| operator_code
== VEC_NEW_EXPR
)
8789 TREE_TYPE (decl
) = coerce_new_type (TREE_TYPE (decl
));
8790 else if (operator_code
== DELETE_EXPR
|| operator_code
== VEC_DELETE_EXPR
)
8791 TREE_TYPE (decl
) = coerce_delete_type (TREE_TYPE (decl
));
8794 /* An operator function must either be a non-static member function
8795 or have at least one parameter of a class, a reference to a class,
8796 an enumeration, or a reference to an enumeration. 13.4.0.6 */
8797 if (! methodp
|| DECL_STATIC_FUNCTION_P (decl
))
8799 if (operator_code
== TYPE_EXPR
8800 || operator_code
== CALL_EXPR
8801 || operator_code
== COMPONENT_REF
8802 || operator_code
== ARRAY_REF
8803 || operator_code
== NOP_EXPR
)
8804 error ("%qD must be a nonstatic member function", decl
);
8809 if (DECL_STATIC_FUNCTION_P (decl
))
8810 error ("%qD must be either a non-static member "
8811 "function or a non-member function", decl
);
8813 for (p
= argtypes
; p
&& p
!= void_list_node
; p
= TREE_CHAIN (p
))
8815 tree arg
= non_reference (TREE_VALUE (p
));
8816 /* IS_AGGR_TYPE, rather than CLASS_TYPE_P, is used
8817 because these checks are performed even on
8818 template functions. */
8819 if (IS_AGGR_TYPE (arg
) || TREE_CODE (arg
) == ENUMERAL_TYPE
)
8823 if (!p
|| p
== void_list_node
)
8828 error ("%qD must have an argument of class or "
8836 /* There are no restrictions on the arguments to an overloaded
8838 if (operator_code
== CALL_EXPR
)
8841 if (IDENTIFIER_TYPENAME_P (name
) && ! DECL_TEMPLATE_INFO (decl
))
8843 tree t
= TREE_TYPE (name
);
8846 int ref
= (TREE_CODE (t
) == REFERENCE_TYPE
);
8847 const char *what
= 0;
8850 t
= TYPE_MAIN_VARIANT (TREE_TYPE (t
));
8852 if (TREE_CODE (t
) == VOID_TYPE
)
8854 else if (t
== current_class_type
)
8855 what
= "the same type";
8856 /* Don't force t to be complete here. */
8857 else if (IS_AGGR_TYPE (t
)
8858 && COMPLETE_TYPE_P (t
)
8859 && DERIVED_FROM_P (t
, current_class_type
))
8860 what
= "a base class";
8862 if (what
&& warn_conversion
)
8863 warning ("conversion to %s%s will never use a type "
8864 "conversion operator",
8865 ref
? "a reference to " : "", what
);
8868 if (operator_code
== COND_EXPR
)
8871 error ("ISO C++ prohibits overloading operator ?:");
8873 else if (ambi_op_p (operator_code
))
8876 /* We pick the one-argument operator codes by default, so
8877 we don't have to change anything. */
8879 else if (arity
== 2)
8881 /* If we thought this was a unary operator, we now know
8882 it to be a binary operator. */
8883 switch (operator_code
)
8886 operator_code
= MULT_EXPR
;
8890 operator_code
= BIT_AND_EXPR
;
8894 operator_code
= PLUS_EXPR
;
8898 operator_code
= MINUS_EXPR
;
8901 case PREINCREMENT_EXPR
:
8902 operator_code
= POSTINCREMENT_EXPR
;
8905 case PREDECREMENT_EXPR
:
8906 operator_code
= POSTDECREMENT_EXPR
;
8913 SET_OVERLOADED_OPERATOR_CODE (decl
, operator_code
);
8915 if ((operator_code
== POSTINCREMENT_EXPR
8916 || operator_code
== POSTDECREMENT_EXPR
)
8917 && ! processing_template_decl
8918 && ! same_type_p (TREE_VALUE (TREE_CHAIN (argtypes
)), integer_type_node
))
8921 error ("postfix %qD must take %<int%> as its argument",
8925 ("postfix %qD must take %<int%> as its second argument",
8932 error ("%qD must take either zero or one argument", decl
);
8934 error ("%qD must take either one or two arguments", decl
);
8937 /* More Effective C++ rule 6. */
8939 && (operator_code
== POSTINCREMENT_EXPR
8940 || operator_code
== POSTDECREMENT_EXPR
8941 || operator_code
== PREINCREMENT_EXPR
8942 || operator_code
== PREDECREMENT_EXPR
))
8944 tree arg
= TREE_VALUE (argtypes
);
8945 tree ret
= TREE_TYPE (TREE_TYPE (decl
));
8946 if (methodp
|| TREE_CODE (arg
) == REFERENCE_TYPE
)
8947 arg
= TREE_TYPE (arg
);
8948 arg
= TYPE_MAIN_VARIANT (arg
);
8949 if (operator_code
== PREINCREMENT_EXPR
8950 || operator_code
== PREDECREMENT_EXPR
)
8952 if (TREE_CODE (ret
) != REFERENCE_TYPE
8953 || !same_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (ret
)),
8955 warning ("prefix %qD should return %qT", decl
,
8956 build_reference_type (arg
));
8960 if (!same_type_p (TYPE_MAIN_VARIANT (ret
), arg
))
8961 warning ("postfix %qD should return %qT", decl
, arg
);
8965 else if (unary_op_p (operator_code
))
8970 error ("%qD must take %<void%>", decl
);
8972 error ("%qD must take exactly one argument", decl
);
8975 else /* if (binary_op_p (operator_code)) */
8980 error ("%qD must take exactly one argument", decl
);
8982 error ("%qD must take exactly two arguments", decl
);
8985 /* More Effective C++ rule 7. */
8987 && (operator_code
== TRUTH_ANDIF_EXPR
8988 || operator_code
== TRUTH_ORIF_EXPR
8989 || operator_code
== COMPOUND_EXPR
))
8990 warning ("user-defined %qD always evaluates both arguments",
8994 /* Effective C++ rule 23. */
8997 && !DECL_ASSIGNMENT_OPERATOR_P (decl
)
8998 && (operator_code
== PLUS_EXPR
8999 || operator_code
== MINUS_EXPR
9000 || operator_code
== TRUNC_DIV_EXPR
9001 || operator_code
== MULT_EXPR
9002 || operator_code
== TRUNC_MOD_EXPR
)
9003 && TREE_CODE (TREE_TYPE (TREE_TYPE (decl
))) == REFERENCE_TYPE
)
9004 warning ("%qD should return by value", decl
);
9007 for (; argtypes
&& argtypes
!= void_list_node
;
9008 argtypes
= TREE_CHAIN (argtypes
))
9009 if (TREE_PURPOSE (argtypes
))
9011 TREE_PURPOSE (argtypes
) = NULL_TREE
;
9012 if (operator_code
== POSTINCREMENT_EXPR
9013 || operator_code
== POSTDECREMENT_EXPR
)
9016 pedwarn ("%qD cannot have default arguments", decl
);
9019 error ("%qD cannot have default arguments", decl
);
9028 tag_name (enum tag_types code
)
9045 /* Name lookup in an elaborated-type-specifier (after the keyword
9046 indicated by TAG_CODE) has found the TYPE_DECL DECL. If the
9047 elaborated-type-specifier is invalid, issue a diagnostic and return
9048 error_mark_node; otherwise, return the *_TYPE to which it referred.
9049 If ALLOW_TEMPLATE_P is true, TYPE may be a class template. */
9052 check_elaborated_type_specifier (enum tag_types tag_code
,
9054 bool allow_template_p
)
9060 struct S { struct S *p; };
9062 name lookup will find the TYPE_DECL for the implicit "S::S"
9063 typedef. Adjust for that here. */
9064 if (DECL_SELF_REFERENCE_P (decl
))
9065 decl
= TYPE_NAME (TREE_TYPE (decl
));
9067 type
= TREE_TYPE (decl
);
9069 /* Check TEMPLATE_TYPE_PARM first because DECL_IMPLICIT_TYPEDEF_P
9070 is false for this case as well. */
9071 if (TREE_CODE (type
) == TEMPLATE_TYPE_PARM
)
9073 error ("using template type parameter %qT after %qs",
9074 type
, tag_name (tag_code
));
9075 return error_mark_node
;
9079 If the identifier resolves to a typedef-name or a template
9080 type-parameter, the elaborated-type-specifier is ill-formed.
9082 In other words, the only legitimate declaration to use in the
9083 elaborated type specifier is the implicit typedef created when
9084 the type is declared. */
9085 else if (!DECL_IMPLICIT_TYPEDEF_P (decl
))
9087 error ("using typedef-name %qD after %qs", decl
, tag_name (tag_code
));
9088 cp_error_at ("%qD has a previous declaration here", decl
);
9089 return error_mark_node
;
9091 else if (TREE_CODE (type
) != RECORD_TYPE
9092 && TREE_CODE (type
) != UNION_TYPE
9093 && tag_code
!= enum_type
)
9095 error ("%qT referred to as %qs", type
, tag_name (tag_code
));
9096 cp_error_at ("%qT has a previous declaration here", type
);
9097 return error_mark_node
;
9099 else if (TREE_CODE (type
) != ENUMERAL_TYPE
9100 && tag_code
== enum_type
)
9102 error ("%qT referred to as enum", type
);
9103 cp_error_at ("%qT has a previous declaration here", type
);
9104 return error_mark_node
;
9106 else if (!allow_template_p
9107 && TREE_CODE (type
) == RECORD_TYPE
9108 && CLASSTYPE_IS_TEMPLATE (type
))
9110 /* If a class template appears as elaborated type specifier
9111 without a template header such as:
9113 template <class T> class C {};
9114 void f(class C); // No template header here
9116 then the required template argument is missing. */
9118 error ("template argument required for %<%s %T%>",
9119 tag_name (tag_code
),
9120 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type
)));
9121 return error_mark_node
;
9127 /* Lookup NAME in elaborate type specifier in scope according to
9128 GLOBALIZE and issue diagnostics if necessary.
9129 Return *_TYPE node upon success, NULL_TREE when the NAME is not
9130 found, and ERROR_MARK_NODE for type error. */
9133 lookup_and_check_tag (enum tag_types tag_code
, tree name
,
9134 bool globalize
, bool template_header_p
)
9139 decl
= lookup_name (name
, 2);
9141 decl
= lookup_type_scope (name
);
9143 if (decl
&& DECL_CLASS_TEMPLATE_P (decl
))
9144 decl
= DECL_TEMPLATE_RESULT (decl
);
9146 if (decl
&& TREE_CODE (decl
) == TYPE_DECL
)
9148 /* Two cases we need to consider when deciding if a class
9149 template is allowed as an elaborated type specifier:
9150 1. It is a self reference to its own class.
9151 2. It comes with a template header.
9155 template <class T> class C {
9156 class C *c1; // DECL_SELF_REFERENCE_P is true
9159 template <class U> class C; // template_header_p is true
9160 template <class T> class C<T>::D {
9161 class C *c2; // DECL_SELF_REFERENCE_P is true
9164 t
= check_elaborated_type_specifier (tag_code
,
9167 | DECL_SELF_REFERENCE_P (decl
));
9174 /* Get the struct, enum or union (TAG_CODE says which) with tag NAME.
9175 Define the tag as a forward-reference if it is not defined.
9177 If a declaration is given, process it here, and report an error if
9178 multiple declarations are not identical.
9180 GLOBALIZE is false when this is also a definition. Only look in
9181 the current frame for the name (since C++ allows new names in any
9184 TEMPLATE_HEADER_P is true when this declaration is preceded by
9185 a set of template parameters. */
9188 xref_tag (enum tag_types tag_code
, tree name
,
9189 bool globalize
, bool template_header_p
)
9191 enum tree_code code
;
9193 tree context
= NULL_TREE
;
9195 timevar_push (TV_NAME_LOOKUP
);
9197 gcc_assert (TREE_CODE (name
) == IDENTIFIER_NODE
);
9209 code
= ENUMERAL_TYPE
;
9215 /* In case of anonymous name, xref_tag is only called to
9216 make type node and push name. Name lookup is not required. */
9217 if (ANON_AGGRNAME_P (name
))
9220 t
= lookup_and_check_tag (tag_code
, name
,
9221 globalize
, template_header_p
);
9223 if (t
== error_mark_node
)
9224 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP
, error_mark_node
);
9226 if (globalize
&& t
&& current_class_type
9227 && template_class_depth (current_class_type
)
9228 && template_header_p
)
9230 /* Since GLOBALIZE is nonzero, we are not looking at a
9231 definition of this tag. Since, in addition, we are currently
9232 processing a (member) template declaration of a template
9233 class, we must be very careful; consider:
9240 { template <class V>
9241 friend struct S1; };
9243 Here, the S2::S1 declaration should not be confused with the
9244 outer declaration. In particular, the inner version should
9245 have a template parameter of level 2, not level 1. This
9246 would be particularly important if the member declaration
9249 template <class V = U> friend struct S1;
9251 say, when we should tsubst into `U' when instantiating
9252 S2. On the other hand, when presented with:
9262 we must find the inner binding eventually. We
9263 accomplish this by making sure that the new type we
9264 create to represent this declaration has the right
9266 context
= TYPE_CONTEXT (t
);
9272 /* If no such tag is yet defined, create a forward-reference node
9273 and record it as the "definition".
9274 When a real declaration of this type is found,
9275 the forward-reference will be altered into a real type. */
9276 if (code
== ENUMERAL_TYPE
)
9278 error ("use of enum %q#D without previous declaration", name
);
9279 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP
, error_mark_node
);
9283 t
= make_aggr_type (code
);
9284 TYPE_CONTEXT (t
) = context
;
9285 pushtag (name
, t
, globalize
);
9290 if (!globalize
&& processing_template_decl
&& IS_AGGR_TYPE (t
))
9291 redeclare_class_template (t
, current_template_parms
);
9292 else if (!processing_template_decl
9294 && CLASSTYPE_IS_TEMPLATE (t
))
9296 error ("redeclaration of %qT as a non-template", t
);
9297 t
= error_mark_node
;
9301 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP
, t
);
9305 xref_tag_from_type (tree old
, tree id
, int globalize
)
9307 enum tag_types tag_kind
;
9309 if (TREE_CODE (old
) == RECORD_TYPE
)
9310 tag_kind
= (CLASSTYPE_DECLARED_CLASS (old
) ? class_type
: record_type
);
9312 tag_kind
= union_type
;
9314 if (id
== NULL_TREE
)
9315 id
= TYPE_IDENTIFIER (old
);
9317 return xref_tag (tag_kind
, id
, globalize
, false);
9320 /* Create the binfo hierarchy for REF with (possibly NULL) base list
9321 BASE_LIST. For each element on BASE_LIST the TREE_PURPOSE is an
9322 access_* node, and the TREE_VALUE is the type of the base-class.
9323 Non-NULL TREE_TYPE indicates virtual inheritance. */
9326 xref_basetypes (tree ref
, tree base_list
)
9329 tree binfo
, base_binfo
;
9330 unsigned max_vbases
= 0; /* Maximum direct & indirect virtual bases. */
9331 unsigned max_bases
= 0; /* Maximum direct bases. */
9333 tree default_access
;
9334 tree igo_prev
; /* Track Inheritance Graph Order. */
9336 if (ref
== error_mark_node
)
9339 /* The base of a derived class is private by default, all others are
9341 default_access
= (TREE_CODE (ref
) == RECORD_TYPE
9342 && CLASSTYPE_DECLARED_CLASS (ref
)
9343 ? access_private_node
: access_public_node
);
9345 /* First, make sure that any templates in base-classes are
9346 instantiated. This ensures that if we call ourselves recursively
9347 we do not get confused about which classes are marked and which
9352 tree basetype
= TREE_VALUE (*basep
);
9354 if (!(processing_template_decl
&& uses_template_parms (basetype
))
9355 && !complete_type_or_else (basetype
, NULL
))
9356 /* An incomplete type. Remove it from the list. */
9357 *basep
= TREE_CHAIN (*basep
);
9361 if (TREE_TYPE (*basep
))
9363 if (CLASS_TYPE_P (basetype
))
9364 max_vbases
+= VEC_length (tree
, CLASSTYPE_VBASECLASSES (basetype
));
9365 basep
= &TREE_CHAIN (*basep
);
9369 TYPE_MARKED_P (ref
) = 1;
9371 /* The binfo slot should be empty, unless this is an (ill-formed)
9373 gcc_assert (!TYPE_BINFO (ref
) || TYPE_SIZE (ref
));
9374 gcc_assert (TYPE_MAIN_VARIANT (ref
) == ref
);
9376 binfo
= make_tree_binfo (max_bases
);
9378 TYPE_BINFO (ref
) = binfo
;
9379 BINFO_OFFSET (binfo
) = size_zero_node
;
9380 BINFO_TYPE (binfo
) = ref
;
9384 BINFO_BASE_ACCESSES (binfo
) = VEC_alloc (tree
, max_bases
);
9385 /* An aggregate cannot have baseclasses. */
9386 CLASSTYPE_NON_AGGREGATE (ref
) = 1;
9388 if (TREE_CODE (ref
) == UNION_TYPE
)
9389 error ("derived union %qT invalid", ref
);
9394 if (TYPE_FOR_JAVA (ref
))
9395 error ("Java class %qT cannot have multiple bases", ref
);
9400 CLASSTYPE_VBASECLASSES (ref
) = VEC_alloc (tree
, max_vbases
);
9402 if (TYPE_FOR_JAVA (ref
))
9403 error ("Java class %qT cannot have virtual bases", ref
);
9406 for (igo_prev
= binfo
; base_list
; base_list
= TREE_CHAIN (base_list
))
9408 tree access
= TREE_PURPOSE (base_list
);
9409 int via_virtual
= TREE_TYPE (base_list
) != NULL_TREE
;
9410 tree basetype
= TREE_VALUE (base_list
);
9412 if (access
== access_default_node
)
9413 access
= default_access
;
9415 if (TREE_CODE (basetype
) == TYPE_DECL
)
9416 basetype
= TREE_TYPE (basetype
);
9417 if (TREE_CODE (basetype
) != RECORD_TYPE
9418 && TREE_CODE (basetype
) != TYPENAME_TYPE
9419 && TREE_CODE (basetype
) != TEMPLATE_TYPE_PARM
9420 && TREE_CODE (basetype
) != BOUND_TEMPLATE_TEMPLATE_PARM
)
9422 error ("base type %qT fails to be a struct or class type",
9427 if (TYPE_FOR_JAVA (basetype
) && (current_lang_depth () == 0))
9428 TYPE_FOR_JAVA (ref
) = 1;
9430 base_binfo
= NULL_TREE
;
9431 if (CLASS_TYPE_P (basetype
) && !dependent_type_p (basetype
))
9433 base_binfo
= TYPE_BINFO (basetype
);
9434 /* The original basetype could have been a typedef'd type. */
9435 basetype
= BINFO_TYPE (base_binfo
);
9437 /* Inherit flags from the base. */
9438 TYPE_HAS_NEW_OPERATOR (ref
)
9439 |= TYPE_HAS_NEW_OPERATOR (basetype
);
9440 TYPE_HAS_ARRAY_NEW_OPERATOR (ref
)
9441 |= TYPE_HAS_ARRAY_NEW_OPERATOR (basetype
);
9442 TYPE_GETS_DELETE (ref
) |= TYPE_GETS_DELETE (basetype
);
9443 TYPE_HAS_CONVERSION (ref
) |= TYPE_HAS_CONVERSION (basetype
);
9444 CLASSTYPE_DIAMOND_SHAPED_P (ref
)
9445 |= CLASSTYPE_DIAMOND_SHAPED_P (basetype
);
9446 CLASSTYPE_REPEATED_BASE_P (ref
)
9447 |= CLASSTYPE_REPEATED_BASE_P (basetype
);
9450 /* We must do this test after we've seen through a typedef
9452 if (TYPE_MARKED_P (basetype
))
9454 if (basetype
== ref
)
9455 error ("recursive type %qT undefined", basetype
);
9457 error ("duplicate base type %qT invalid", basetype
);
9460 TYPE_MARKED_P (basetype
) = 1;
9462 base_binfo
= copy_binfo (base_binfo
, basetype
, ref
,
9463 &igo_prev
, via_virtual
);
9464 if (!BINFO_INHERITANCE_CHAIN (base_binfo
))
9465 BINFO_INHERITANCE_CHAIN (base_binfo
) = binfo
;
9467 BINFO_BASE_APPEND (binfo
, base_binfo
);
9468 BINFO_BASE_ACCESS_APPEND (binfo
, access
);
9471 if (VEC_space (tree
, CLASSTYPE_VBASECLASSES (ref
), 1))
9472 /* If we have space in the vbase vector, we must have shared at
9473 least one of them, and are therefore diamond shaped. */
9474 CLASSTYPE_DIAMOND_SHAPED_P (ref
) = 1;
9476 /* Unmark all the types. */
9477 for (i
= 0; BINFO_BASE_ITERATE (binfo
, i
, base_binfo
); i
++)
9478 TYPE_MARKED_P (BINFO_TYPE (base_binfo
)) = 0;
9479 TYPE_MARKED_P (ref
) = 0;
9481 /* Now see if we have a repeated base type. */
9482 if (!CLASSTYPE_REPEATED_BASE_P (ref
))
9484 for (base_binfo
= binfo
; base_binfo
;
9485 base_binfo
= TREE_CHAIN (base_binfo
))
9487 if (TYPE_MARKED_P (BINFO_TYPE (base_binfo
)))
9489 CLASSTYPE_REPEATED_BASE_P (ref
) = 1;
9492 TYPE_MARKED_P (BINFO_TYPE (base_binfo
)) = 1;
9494 for (base_binfo
= binfo
; base_binfo
;
9495 base_binfo
= TREE_CHAIN (base_binfo
))
9496 if (TYPE_MARKED_P (BINFO_TYPE (base_binfo
)))
9497 TYPE_MARKED_P (BINFO_TYPE (base_binfo
)) = 0;
9504 /* Begin compiling the definition of an enumeration type.
9505 NAME is its name (or null if anonymous).
9506 Returns the type object, as yet incomplete.
9507 Also records info about it so that build_enumerator
9508 may be used to declare the individual values as they are read. */
9511 start_enum (tree name
)
9513 tree enumtype
= NULL_TREE
;
9515 /* If this is the real definition for a previous forward reference,
9516 fill in the contents in the same object that used to be the
9517 forward reference. */
9519 if (name
!= NULL_TREE
)
9520 enumtype
= lookup_and_check_tag (enum_type
, name
, 0, 0);
9522 if (enumtype
!= NULL_TREE
&& TREE_CODE (enumtype
) == ENUMERAL_TYPE
)
9524 error ("multiple definition of %q#T", enumtype
);
9525 error ("%Jprevious definition here", TYPE_MAIN_DECL (enumtype
));
9526 /* Clear out TYPE_VALUES, and start again. */
9527 TYPE_VALUES (enumtype
) = NULL_TREE
;
9531 enumtype
= make_node (ENUMERAL_TYPE
);
9532 pushtag (name
, enumtype
, 0);
9538 /* After processing and defining all the values of an enumeration type,
9539 install their decls in the enumeration type and finish it off.
9540 ENUMTYPE is the type object and VALUES a list of name-value pairs. */
9543 finish_enum (tree enumtype
)
9552 bool use_short_enum
;
9556 integer_type_kind itk
;
9557 tree underlying_type
= NULL_TREE
;
9559 /* We built up the VALUES in reverse order. */
9560 TYPE_VALUES (enumtype
) = nreverse (TYPE_VALUES (enumtype
));
9562 /* For an enum defined in a template, just set the type of the values;
9563 all further processing is postponed until the template is
9564 instantiated. We need to set the type so that tsubst of a CONST_DECL
9566 if (processing_template_decl
)
9568 for (values
= TYPE_VALUES (enumtype
);
9570 values
= TREE_CHAIN (values
))
9571 TREE_TYPE (TREE_VALUE (values
)) = enumtype
;
9572 if (at_function_scope_p ())
9573 add_stmt (build_min (TAG_DEFN
, enumtype
));
9577 /* Determine the minimum and maximum values of the enumerators. */
9578 if (TYPE_VALUES (enumtype
))
9580 minnode
= maxnode
= NULL_TREE
;
9582 for (values
= TYPE_VALUES (enumtype
);
9584 values
= TREE_CHAIN (values
))
9586 decl
= TREE_VALUE (values
);
9588 /* [dcl.enum]: Following the closing brace of an enum-specifier,
9589 each enumerator has the type of its enumeration. Prior to the
9590 closing brace, the type of each enumerator is the type of its
9591 initializing value. */
9592 TREE_TYPE (decl
) = enumtype
;
9594 /* Update the minimum and maximum values, if appropriate. */
9595 value
= DECL_INITIAL (decl
);
9596 /* Figure out what the minimum and maximum values of the
9599 minnode
= maxnode
= value
;
9600 else if (tree_int_cst_lt (maxnode
, value
))
9602 else if (tree_int_cst_lt (value
, minnode
))
9609 If the enumerator-list is empty, the underlying type is as if
9610 the enumeration had a single enumerator with value 0. */
9611 minnode
= maxnode
= integer_zero_node
;
9613 /* Compute the number of bits require to represent all values of the
9614 enumeration. We must do this before the type of MINNODE and
9615 MAXNODE are transformed, since min_precision relies on the
9616 TREE_TYPE of the value it is passed. */
9617 unsignedp
= tree_int_cst_sgn (minnode
) >= 0;
9618 lowprec
= min_precision (minnode
, unsignedp
);
9619 highprec
= min_precision (maxnode
, unsignedp
);
9620 precision
= MAX (lowprec
, highprec
);
9622 /* Determine the underlying type of the enumeration.
9626 The underlying type of an enumeration is an integral type that
9627 can represent all the enumerator values defined in the
9628 enumeration. It is implementation-defined which integral type is
9629 used as the underlying type for an enumeration except that the
9630 underlying type shall not be larger than int unless the value of
9631 an enumerator cannot fit in an int or unsigned int.
9633 We use "int" or an "unsigned int" as the underlying type, even if
9634 a smaller integral type would work, unless the user has
9635 explicitly requested that we use the smallest possible type. The
9636 user can request that for all enumerations with a command line
9637 flag, or for just one enumeration with an attribute. */
9639 use_short_enum
= flag_short_enums
9640 || lookup_attribute ("packed", TYPE_ATTRIBUTES (enumtype
));
9642 for (itk
= (use_short_enum
? itk_char
: itk_int
);
9646 underlying_type
= integer_types
[itk
];
9647 if (TYPE_PRECISION (underlying_type
) >= precision
9648 && TYPE_UNSIGNED (underlying_type
) == unsignedp
)
9651 if (itk
== itk_none
)
9655 IF no integral type can represent all the enumerator values, the
9656 enumeration is ill-formed. */
9657 error ("no integral type can represent all of the enumerator values "
9658 "for %qT", enumtype
);
9659 precision
= TYPE_PRECISION (long_long_integer_type_node
);
9660 underlying_type
= integer_types
[itk_unsigned_long_long
];
9663 /* Compute the minium and maximum values for the type.
9667 For an enumeration where emin is the smallest enumerator and emax
9668 is the largest, the values of the enumeration are the values of the
9669 underlying type in the range bmin to bmax, where bmin and bmax are,
9670 respectively, the smallest and largest values of the smallest bit-
9671 field that can store emin and emax. */
9673 /* The middle-end currently assumes that types with TYPE_PRECISION
9674 narrower than their underlying type are suitably zero or sign
9675 extended to fill their mode. g++ doesn't make these guarantees.
9676 Until the middle-end can represent such paradoxical types, we
9677 set the TYPE_PRECISION to the width of the underlying type. */
9678 TYPE_PRECISION (enumtype
) = TYPE_PRECISION (underlying_type
);
9680 set_min_and_max_values_for_integral_type (enumtype
, precision
, unsignedp
);
9684 The value of sizeof() applied to an enumeration type, an object
9685 of an enumeration type, or an enumerator, is the value of sizeof()
9686 applied to the underlying type. */
9687 TYPE_SIZE (enumtype
) = TYPE_SIZE (underlying_type
);
9688 TYPE_SIZE_UNIT (enumtype
) = TYPE_SIZE_UNIT (underlying_type
);
9689 TYPE_MODE (enumtype
) = TYPE_MODE (underlying_type
);
9690 TYPE_ALIGN (enumtype
) = TYPE_ALIGN (underlying_type
);
9691 TYPE_USER_ALIGN (enumtype
) = TYPE_USER_ALIGN (underlying_type
);
9692 TYPE_UNSIGNED (enumtype
) = TYPE_UNSIGNED (underlying_type
);
9694 /* Convert each of the enumerators to the type of the underlying
9695 type of the enumeration. */
9696 for (values
= TYPE_VALUES (enumtype
); values
; values
= TREE_CHAIN (values
))
9698 decl
= TREE_VALUE (values
);
9699 value
= perform_implicit_conversion (underlying_type
,
9700 DECL_INITIAL (decl
));
9702 /* Do not clobber shared ints. */
9703 value
= copy_node (value
);
9705 TREE_TYPE (value
) = enumtype
;
9706 DECL_INITIAL (decl
) = value
;
9707 TREE_VALUE (values
) = value
;
9710 /* Fix up all variant types of this enum type. */
9711 for (t
= TYPE_MAIN_VARIANT (enumtype
); t
; t
= TYPE_NEXT_VARIANT (t
))
9713 TYPE_VALUES (t
) = TYPE_VALUES (enumtype
);
9714 TYPE_MIN_VALUE (t
) = TYPE_MIN_VALUE (enumtype
);
9715 TYPE_MAX_VALUE (t
) = TYPE_MAX_VALUE (enumtype
);
9716 TYPE_SIZE (t
) = TYPE_SIZE (enumtype
);
9717 TYPE_SIZE_UNIT (t
) = TYPE_SIZE_UNIT (enumtype
);
9718 TYPE_MODE (t
) = TYPE_MODE (enumtype
);
9719 TYPE_PRECISION (t
) = TYPE_PRECISION (enumtype
);
9720 TYPE_ALIGN (t
) = TYPE_ALIGN (enumtype
);
9721 TYPE_USER_ALIGN (t
) = TYPE_USER_ALIGN (enumtype
);
9722 TYPE_UNSIGNED (t
) = TYPE_UNSIGNED (enumtype
);
9725 /* Finish debugging output for this type. */
9726 rest_of_type_compilation (enumtype
, namespace_bindings_p ());
9729 /* Build and install a CONST_DECL for an enumeration constant of the
9730 enumeration type ENUMTYPE whose NAME and VALUE (if any) are provided.
9731 Assignment of sequential values by default is handled here. */
9734 build_enumerator (tree name
, tree value
, tree enumtype
)
9740 /* Remove no-op casts from the value. */
9742 STRIP_TYPE_NOPS (value
);
9744 if (! processing_template_decl
)
9746 /* Validate and default VALUE. */
9747 if (value
!= NULL_TREE
)
9749 value
= decl_constant_value (value
);
9751 if (TREE_CODE (value
) == INTEGER_CST
)
9753 value
= perform_integral_promotions (value
);
9754 constant_expression_warning (value
);
9758 error ("enumerator value for %qD not integer constant", name
);
9763 /* Default based on previous value. */
9764 if (value
== NULL_TREE
)
9766 if (TYPE_VALUES (enumtype
))
9769 unsigned HOST_WIDE_INT lo
;
9773 /* The next value is the previous value plus one. We can
9774 safely assume that the previous value is an INTEGER_CST.
9775 add_double doesn't know the type of the target expression,
9776 so we must check with int_fits_type_p as well. */
9777 prev_value
= DECL_INITIAL (TREE_VALUE (TYPE_VALUES (enumtype
)));
9778 overflowed
= add_double (TREE_INT_CST_LOW (prev_value
),
9779 TREE_INT_CST_HIGH (prev_value
),
9781 value
= build_int_cst_wide (TREE_TYPE (prev_value
), lo
, hi
);
9782 overflowed
|= !int_fits_type_p (value
, TREE_TYPE (prev_value
));
9785 error ("overflow in enumeration values at %qD", name
);
9788 value
= integer_zero_node
;
9791 /* Remove no-op casts from the value. */
9792 STRIP_TYPE_NOPS (value
);
9795 /* C++ associates enums with global, function, or class declarations. */
9796 context
= current_scope ();
9798 /* Build the actual enumeration constant. Note that the enumeration
9799 constants have the type of their initializers until the
9800 enumeration is complete:
9804 Following the closing brace of an enum-specifier, each enumer-
9805 ator has the type of its enumeration. Prior to the closing
9806 brace, the type of each enumerator is the type of its
9809 In finish_enum we will reset the type. Of course, if we're
9810 processing a template, there may be no value. */
9811 type
= value
? TREE_TYPE (value
) : NULL_TREE
;
9813 if (context
&& context
== current_class_type
)
9814 /* This enum declaration is local to the class. We need the full
9815 lang_decl so that we can record DECL_CLASS_CONTEXT, for example. */
9816 decl
= build_lang_decl (CONST_DECL
, name
, type
);
9818 /* It's a global enum, or it's local to a function. (Note local to
9819 a function could mean local to a class method. */
9820 decl
= build_decl (CONST_DECL
, name
, type
);
9822 DECL_CONTEXT (decl
) = FROB_CONTEXT (context
);
9823 TREE_CONSTANT (decl
) = 1;
9824 TREE_INVARIANT (decl
) = 1;
9825 TREE_READONLY (decl
) = 1;
9826 DECL_INITIAL (decl
) = value
;
9828 if (context
&& context
== current_class_type
)
9829 /* In something like `struct S { enum E { i = 7 }; };' we put `i'
9830 on the TYPE_FIELDS list for `S'. (That's so that you can say
9831 things like `S::i' later.) */
9832 finish_member_declaration (decl
);
9836 /* Add this enumeration constant to the list for this type. */
9837 TYPE_VALUES (enumtype
) = tree_cons (name
, decl
, TYPE_VALUES (enumtype
));
9841 /* We're defining DECL. Make sure that it's type is OK. */
9844 check_function_type (tree decl
, tree current_function_parms
)
9846 tree fntype
= TREE_TYPE (decl
);
9847 tree return_type
= complete_type (TREE_TYPE (fntype
));
9849 /* In a function definition, arg types must be complete. */
9850 require_complete_types_for_parms (current_function_parms
);
9852 if (dependent_type_p (return_type
))
9854 if (!COMPLETE_OR_VOID_TYPE_P (return_type
))
9856 error ("return type %q#T is incomplete", TREE_TYPE (fntype
));
9858 /* Make it return void instead, but don't change the
9859 type of the DECL_RESULT, in case we have a named return value. */
9860 if (TREE_CODE (fntype
) == METHOD_TYPE
)
9862 tree ctype
= TREE_TYPE (TREE_VALUE (TYPE_ARG_TYPES (fntype
)));
9864 = build_method_type_directly (ctype
,
9866 FUNCTION_ARG_CHAIN (decl
));
9870 = build_function_type (void_type_node
,
9871 TYPE_ARG_TYPES (TREE_TYPE (decl
)));
9873 = build_exception_variant (fntype
,
9874 TYPE_RAISES_EXCEPTIONS (fntype
));
9877 abstract_virtuals_error (decl
, TREE_TYPE (fntype
));
9880 /* Create the FUNCTION_DECL for a function definition.
9881 DECLSPECS and DECLARATOR are the parts of the declaration;
9882 they describe the function's name and the type it returns,
9883 but twisted together in a fashion that parallels the syntax of C.
9885 FLAGS is a bitwise or of SF_PRE_PARSED (indicating that the
9886 DECLARATOR is really the DECL for the function we are about to
9887 process and that DECLSPECS should be ignored), SF_INCLASS_INLINE
9888 indicating that the function is an inline defined in-class.
9890 This function creates a binding context for the function body
9891 as well as setting up the FUNCTION_DECL in current_function_decl.
9893 For C++, we must first check whether that datum makes any sense.
9894 For example, "class A local_a(1,2);" means that variable local_a
9895 is an aggregate of type A, which should have a constructor
9896 applied to it with the argument list [1, 2]. */
9899 start_preparsed_function (tree decl1
, tree attrs
, int flags
)
9901 tree ctype
= NULL_TREE
;
9904 int doing_friend
= 0;
9905 struct cp_binding_level
*bl
;
9906 tree current_function_parms
;
9907 struct c_fileinfo
*finfo
= get_fileinfo (lbasename (input_filename
));
9910 gcc_assert (TREE_CODE (TREE_VALUE (void_list_node
)) == VOID_TYPE
);
9911 gcc_assert (TREE_CHAIN (void_list_node
) == NULL_TREE
);
9913 fntype
= TREE_TYPE (decl1
);
9914 if (TREE_CODE (fntype
) == METHOD_TYPE
)
9915 ctype
= TYPE_METHOD_BASETYPE (fntype
);
9917 /* ISO C++ 11.4/5. A friend function defined in a class is in
9918 the (lexical) scope of the class in which it is defined. */
9919 if (!ctype
&& DECL_FRIEND_P (decl1
))
9921 ctype
= DECL_FRIEND_CONTEXT (decl1
);
9923 /* CTYPE could be null here if we're dealing with a template;
9924 for example, `inline friend float foo()' inside a template
9925 will have no CTYPE set. */
9926 if (ctype
&& TREE_CODE (ctype
) != RECORD_TYPE
)
9932 if (DECL_DECLARED_INLINE_P (decl1
)
9933 && lookup_attribute ("noinline", attrs
))
9934 warning ("%Jinline function %qD given attribute noinline", decl1
, decl1
);
9936 if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (decl1
))
9937 /* This is a constructor, we must ensure that any default args
9938 introduced by this definition are propagated to the clones
9939 now. The clones are used directly in overload resolution. */
9940 adjust_clone_args (decl1
);
9942 /* Sometimes we don't notice that a function is a static member, and
9943 build a METHOD_TYPE for it. Fix that up now. */
9944 if (ctype
!= NULL_TREE
&& DECL_STATIC_FUNCTION_P (decl1
)
9945 && TREE_CODE (TREE_TYPE (decl1
)) == METHOD_TYPE
)
9947 revert_static_member_fn (decl1
);
9951 /* Set up current_class_type, and enter the scope of the class, if
9954 push_nested_class (ctype
);
9955 else if (DECL_STATIC_FUNCTION_P (decl1
))
9956 push_nested_class (DECL_CONTEXT (decl1
));
9958 /* Now that we have entered the scope of the class, we must restore
9959 the bindings for any template parameters surrounding DECL1, if it
9960 is an inline member template. (Order is important; consider the
9961 case where a template parameter has the same name as a field of
9962 the class.) It is not until after this point that
9963 PROCESSING_TEMPLATE_DECL is guaranteed to be set up correctly. */
9964 if (flags
& SF_INCLASS_INLINE
)
9965 maybe_begin_member_template_processing (decl1
);
9967 /* Effective C++ rule 15. */
9969 && DECL_OVERLOADED_OPERATOR_P (decl1
) == NOP_EXPR
9970 && TREE_CODE (TREE_TYPE (fntype
)) == VOID_TYPE
)
9971 warning ("%<operator=%> should return a reference to %<*this%>");
9973 /* Make the init_value nonzero so pushdecl knows this is not tentative.
9974 error_mark_node is replaced below (in poplevel) with the BLOCK. */
9975 if (!DECL_INITIAL (decl1
))
9976 DECL_INITIAL (decl1
) = error_mark_node
;
9978 /* This function exists in static storage.
9979 (This does not mean `static' in the C sense!) */
9980 TREE_STATIC (decl1
) = 1;
9982 /* We must call push_template_decl after current_class_type is set
9983 up. (If we are processing inline definitions after exiting a
9984 class scope, current_class_type will be NULL_TREE until set above
9985 by push_nested_class.) */
9986 if (processing_template_decl
)
9987 decl1
= push_template_decl (decl1
);
9989 /* We are now in the scope of the function being defined. */
9990 current_function_decl
= decl1
;
9992 /* Save the parm names or decls from this function's declarator
9993 where store_parm_decls will find them. */
9994 current_function_parms
= DECL_ARGUMENTS (decl1
);
9996 /* Make sure the parameter and return types are reasonable. When
9997 you declare a function, these types can be incomplete, but they
9998 must be complete when you define the function. */
9999 check_function_type (decl1
, current_function_parms
);
10001 /* Build the return declaration for the function. */
10002 restype
= TREE_TYPE (fntype
);
10003 /* Promote the value to int before returning it. */
10004 if (c_promoting_integer_type_p (restype
))
10005 restype
= type_promotes_to (restype
);
10006 if (DECL_RESULT (decl1
) == NULL_TREE
)
10010 resdecl
= build_decl (RESULT_DECL
, 0, TYPE_MAIN_VARIANT (restype
));
10011 DECL_ARTIFICIAL (resdecl
) = 1;
10012 DECL_IGNORED_P (resdecl
) = 1;
10013 DECL_RESULT (decl1
) = resdecl
;
10015 c_apply_type_quals_to_decl (cp_type_quals (restype
), resdecl
);
10018 /* Initialize RTL machinery. We cannot do this until
10019 CURRENT_FUNCTION_DECL and DECL_RESULT are set up. We do this
10020 even when processing a template; this is how we get
10021 CFUN set up, and our per-function variables initialized.
10022 FIXME factor out the non-RTL stuff. */
10023 bl
= current_binding_level
;
10024 allocate_struct_function (decl1
);
10025 current_binding_level
= bl
;
10027 /* Even though we're inside a function body, we still don't want to
10028 call expand_expr to calculate the size of a variable-sized array.
10029 We haven't necessarily assigned RTL to all variables yet, so it's
10030 not safe to try to expand expressions involving them. */
10031 cfun
->x_dont_save_pending_sizes_p
= 1;
10033 /* Start the statement-tree, start the tree now. */
10034 DECL_SAVED_TREE (decl1
) = push_stmt_list ();
10036 /* Let the user know we're compiling this function. */
10037 announce_function (decl1
);
10039 /* Record the decl so that the function name is defined.
10040 If we already have a decl for this name, and it is a FUNCTION_DECL,
10041 use the old decl. */
10042 if (!processing_template_decl
&& !(flags
& SF_PRE_PARSED
))
10044 /* A specialization is not used to guide overload resolution. */
10045 if (!DECL_FUNCTION_MEMBER_P (decl1
)
10046 && !(DECL_USE_TEMPLATE (decl1
) &&
10047 PRIMARY_TEMPLATE_P (DECL_TI_TEMPLATE (decl1
))))
10049 tree olddecl
= pushdecl (decl1
);
10051 if (olddecl
== error_mark_node
)
10052 /* If something went wrong when registering the declaration,
10053 use DECL1; we have to have a FUNCTION_DECL to use when
10054 parsing the body of the function. */
10057 /* Otherwise, OLDDECL is either a previous declaration of
10058 the same function or DECL1 itself. */
10063 /* We need to set the DECL_CONTEXT. */
10064 if (!DECL_CONTEXT (decl1
) && DECL_TEMPLATE_INFO (decl1
))
10065 DECL_CONTEXT (decl1
) = DECL_CONTEXT (DECL_TI_TEMPLATE (decl1
));
10066 /* And make sure we have enough default args. */
10067 check_default_args (decl1
);
10069 fntype
= TREE_TYPE (decl1
);
10072 /* Determine the ELF visibility attribute for the function. We must
10073 not do this before calling "pushdecl", as we must allow
10074 "duplicate_decls" to merge any attributes appropriately. */
10075 if (!DECL_CLONED_FUNCTION_P (decl1
))
10076 determine_visibility (decl1
);
10078 /* Reset these in case the call to pushdecl changed them. */
10079 current_function_decl
= decl1
;
10080 cfun
->decl
= decl1
;
10082 /* If we are (erroneously) defining a function that we have already
10083 defined before, wipe out what we knew before. */
10084 if (!DECL_PENDING_INLINE_P (decl1
))
10085 DECL_SAVED_FUNCTION_DATA (decl1
) = NULL
;
10087 if (ctype
&& !doing_friend
&& !DECL_STATIC_FUNCTION_P (decl1
))
10089 /* We know that this was set up by `grokclassfn'. We do not
10090 wait until `store_parm_decls', since evil parse errors may
10091 never get us to that point. Here we keep the consistency
10092 between `current_class_type' and `current_class_ptr'. */
10093 tree t
= DECL_ARGUMENTS (decl1
);
10095 gcc_assert (t
!= NULL_TREE
&& TREE_CODE (t
) == PARM_DECL
);
10096 gcc_assert (TREE_CODE (TREE_TYPE (t
)) == POINTER_TYPE
);
10098 cp_function_chain
->x_current_class_ref
10099 = build_indirect_ref (t
, NULL
);
10100 cp_function_chain
->x_current_class_ptr
= t
;
10102 /* Constructors and destructors need to know whether they're "in
10103 charge" of initializing virtual base classes. */
10104 t
= TREE_CHAIN (t
);
10105 if (DECL_HAS_IN_CHARGE_PARM_P (decl1
))
10107 current_in_charge_parm
= t
;
10108 t
= TREE_CHAIN (t
);
10110 if (DECL_HAS_VTT_PARM_P (decl1
))
10112 gcc_assert (DECL_NAME (t
) == vtt_parm_identifier
);
10113 current_vtt_parm
= t
;
10117 if (DECL_INTERFACE_KNOWN (decl1
))
10119 tree ctx
= decl_function_context (decl1
);
10121 if (DECL_NOT_REALLY_EXTERN (decl1
))
10122 DECL_EXTERNAL (decl1
) = 0;
10124 if (ctx
!= NULL_TREE
&& DECL_DECLARED_INLINE_P (ctx
)
10125 && TREE_PUBLIC (ctx
))
10126 /* This is a function in a local class in an extern inline
10128 comdat_linkage (decl1
);
10130 /* If this function belongs to an interface, it is public.
10131 If it belongs to someone else's interface, it is also external.
10132 This only affects inlines and template instantiations. */
10133 else if (finfo
->interface_unknown
== 0
10134 && ! DECL_TEMPLATE_INSTANTIATION (decl1
))
10136 if (DECL_DECLARED_INLINE_P (decl1
)
10137 || DECL_TEMPLATE_INSTANTIATION (decl1
)
10138 || processing_template_decl
)
10140 DECL_EXTERNAL (decl1
)
10141 = (finfo
->interface_only
10142 || (DECL_DECLARED_INLINE_P (decl1
)
10143 && ! flag_implement_inlines
10144 && !DECL_VINDEX (decl1
)));
10146 /* For WIN32 we also want to put these in linkonce sections. */
10147 maybe_make_one_only (decl1
);
10150 DECL_EXTERNAL (decl1
) = 0;
10151 DECL_NOT_REALLY_EXTERN (decl1
) = 0;
10152 DECL_INTERFACE_KNOWN (decl1
) = 1;
10153 /* If this function is in an interface implemented in this file,
10154 make sure that the backend knows to emit this function
10156 if (!DECL_EXTERNAL (decl1
))
10157 mark_needed (decl1
);
10159 else if (finfo
->interface_unknown
&& finfo
->interface_only
10160 && ! DECL_TEMPLATE_INSTANTIATION (decl1
))
10162 /* If MULTIPLE_SYMBOL_SPACES is defined and we saw a #pragma
10163 interface, we will have both finfo->interface_unknown and
10164 finfo->interface_only set. In that case, we don't want to
10165 use the normal heuristics because someone will supply a
10166 #pragma implementation elsewhere, and deducing it here would
10167 produce a conflict. */
10168 comdat_linkage (decl1
);
10169 DECL_EXTERNAL (decl1
) = 0;
10170 DECL_INTERFACE_KNOWN (decl1
) = 1;
10171 DECL_DEFER_OUTPUT (decl1
) = 1;
10175 /* This is a definition, not a reference.
10176 So clear DECL_EXTERNAL. */
10177 DECL_EXTERNAL (decl1
) = 0;
10179 if ((DECL_DECLARED_INLINE_P (decl1
)
10180 || DECL_TEMPLATE_INSTANTIATION (decl1
))
10181 && ! DECL_INTERFACE_KNOWN (decl1
)
10182 /* Don't try to defer nested functions for now. */
10183 && ! decl_function_context (decl1
))
10184 DECL_DEFER_OUTPUT (decl1
) = 1;
10186 DECL_INTERFACE_KNOWN (decl1
) = 1;
10189 begin_scope (sk_function_parms
, decl1
);
10193 if (DECL_DESTRUCTOR_P (decl1
)
10194 || (DECL_CONSTRUCTOR_P (decl1
)
10195 && targetm
.cxx
.cdtor_returns_this ()))
10197 cdtor_label
= build_decl (LABEL_DECL
, NULL_TREE
, NULL_TREE
);
10198 DECL_CONTEXT (cdtor_label
) = current_function_decl
;
10201 start_fname_decls ();
10203 store_parm_decls (current_function_parms
);
10207 /* Like start_preparsed_function, except that instead of a
10208 FUNCTION_DECL, this function takes DECLSPECS and DECLARATOR.
10210 Returns 1 on success. If the DECLARATOR is not suitable for a function
10211 (it defines a datum instead), we return 0, which tells
10212 yyparse to report a parse error. */
10215 start_function (cp_decl_specifier_seq
*declspecs
,
10216 const cp_declarator
*declarator
,
10221 if (have_extern_spec
)
10223 declspecs
->storage_class
= sc_extern
;
10224 /* This should only be done once on the outermost decl. */
10225 have_extern_spec
= false;
10228 decl1
= grokdeclarator (declarator
, declspecs
, FUNCDEF
, 1, &attrs
);
10229 /* If the declarator is not suitable for a function definition,
10230 cause a syntax error. */
10231 if (decl1
== NULL_TREE
|| TREE_CODE (decl1
) != FUNCTION_DECL
)
10234 /* If #pragma weak was used, mark the decl weak now. */
10235 if (global_scope_p (current_binding_level
))
10236 maybe_apply_pragma_weak (decl1
);
10238 if (DECL_MAIN_P (decl1
))
10239 /* main must return int. grokfndecl should have corrected it
10240 (and issued a diagnostic) if the user got it wrong. */
10241 gcc_assert (same_type_p (TREE_TYPE (TREE_TYPE (decl1
)),
10242 integer_type_node
));
10244 start_preparsed_function (decl1
, attrs
, /*flags=*/SF_DEFAULT
);
10249 /* Store the parameter declarations into the current function declaration.
10250 This is called after parsing the parameter declarations, before
10251 digesting the body of the function.
10253 Also install to binding contour return value identifier, if any. */
10256 store_parm_decls (tree current_function_parms
)
10258 tree fndecl
= current_function_decl
;
10261 /* This is a chain of any other decls that came in among the parm
10262 declarations. If a parm is declared with enum {foo, bar} x;
10263 then CONST_DECLs for foo and bar are put here. */
10264 tree nonparms
= NULL_TREE
;
10266 if (current_function_parms
)
10268 /* This case is when the function was defined with an ANSI prototype.
10269 The parms already have decls, so we need not do anything here
10270 except record them as in effect
10271 and complain if any redundant old-style parm decls were written. */
10273 tree specparms
= current_function_parms
;
10276 /* Must clear this because it might contain TYPE_DECLs declared
10278 current_binding_level
->names
= NULL
;
10280 /* If we're doing semantic analysis, then we'll call pushdecl
10281 for each of these. We must do them in reverse order so that
10282 they end in the correct forward order. */
10283 specparms
= nreverse (specparms
);
10285 for (parm
= specparms
; parm
; parm
= next
)
10287 next
= TREE_CHAIN (parm
);
10288 if (TREE_CODE (parm
) == PARM_DECL
)
10290 if (DECL_NAME (parm
) == NULL_TREE
10291 || TREE_CODE (parm
) != VOID_TYPE
)
10294 error ("parameter %qD declared void", parm
);
10298 /* If we find an enum constant or a type tag,
10299 put it aside for the moment. */
10300 TREE_CHAIN (parm
) = NULL_TREE
;
10301 nonparms
= chainon (nonparms
, parm
);
10305 /* Get the decls in their original chain order and record in the
10306 function. This is all and only the PARM_DECLs that were
10307 pushed into scope by the loop above. */
10308 DECL_ARGUMENTS (fndecl
) = getdecls ();
10311 DECL_ARGUMENTS (fndecl
) = NULL_TREE
;
10313 /* Now store the final chain of decls for the arguments
10314 as the decl-chain of the current lexical scope.
10315 Put the enumerators in as well, at the front so that
10316 DECL_ARGUMENTS is not modified. */
10317 current_binding_level
->names
= chainon (nonparms
, DECL_ARGUMENTS (fndecl
));
10319 /* For a cloned function, we've already got all the code we need;
10320 there's no need to add any extra bits. */
10321 if (!DECL_CLONED_FUNCTION_P (fndecl
))
10323 /* Do the starting of the exception specifications, if we have any. */
10324 if (flag_exceptions
&& !processing_template_decl
10325 && flag_enforce_eh_specs
10326 && TYPE_RAISES_EXCEPTIONS (TREE_TYPE (current_function_decl
)))
10327 current_eh_spec_block
= begin_eh_spec_block ();
10332 /* We have finished doing semantic analysis on DECL, but have not yet
10333 generated RTL for its body. Save away our current state, so that
10334 when we want to generate RTL later we know what to do. */
10337 save_function_data (tree decl
)
10339 struct language_function
*f
;
10341 /* Save the language-specific per-function data so that we can
10342 get it back when we really expand this function. */
10343 gcc_assert (!DECL_PENDING_INLINE_P (decl
));
10346 f
= GGC_NEW (struct language_function
);
10347 memcpy (f
, cp_function_chain
, sizeof (struct language_function
));
10348 DECL_SAVED_FUNCTION_DATA (decl
) = f
;
10350 /* Clear out the bits we don't need. */
10351 f
->base
.x_stmt_tree
.x_cur_stmt_list
= NULL_TREE
;
10352 f
->x_named_label_uses
= NULL
;
10353 f
->bindings
= NULL
;
10354 f
->x_local_names
= NULL
;
10358 /* Set the return value of the constructor (if present). */
10361 finish_constructor_body (void)
10366 if (targetm
.cxx
.cdtor_returns_this ())
10368 /* Any return from a constructor will end up here. */
10369 add_stmt (build_stmt (LABEL_EXPR
, cdtor_label
));
10371 val
= DECL_ARGUMENTS (current_function_decl
);
10372 val
= build2 (MODIFY_EXPR
, TREE_TYPE (val
),
10373 DECL_RESULT (current_function_decl
), val
);
10374 /* Return the address of the object. */
10375 exprstmt
= build_stmt (RETURN_EXPR
, val
);
10376 add_stmt (exprstmt
);
10380 /* Do all the processing for the beginning of a destructor; set up the
10381 vtable pointers and cleanups for bases and members. */
10384 begin_destructor_body (void)
10387 tree compound_stmt
;
10389 /* If the dtor is empty, and we know there is not any possible
10390 way we could use any vtable entries, before they are possibly
10391 set by a base class dtor, we don't have to setup the vtables,
10392 as we know that any base class dtor will set up any vtables
10393 it needs. We avoid MI, because one base class dtor can do a
10394 virtual dispatch to an overridden function that would need to
10395 have a non-related vtable set up, we cannot avoid setting up
10396 vtables in that case. We could change this to see if there
10397 is just one vtable.
10399 ??? In the destructor for a class, the vtables are set
10400 appropriately for that class. There will be no non-related
10401 vtables. jason 2001-12-11. */
10402 if_stmt
= begin_if_stmt ();
10404 /* If it is not safe to avoid setting up the vtables, then
10405 someone will change the condition to be boolean_true_node.
10406 (Actually, for now, we do not have code to set the condition
10407 appropriately, so we just assume that we always need to
10408 initialize the vtables.) */
10409 finish_if_stmt_cond (boolean_true_node
, if_stmt
);
10411 compound_stmt
= begin_compound_stmt (0);
10413 /* Make all virtual function table pointers in non-virtual base
10414 classes point to CURRENT_CLASS_TYPE's virtual function
10416 initialize_vtbl_ptrs (current_class_ptr
);
10418 finish_compound_stmt (compound_stmt
);
10419 finish_then_clause (if_stmt
);
10420 finish_if_stmt (if_stmt
);
10422 /* And insert cleanups for our bases and members so that they
10423 will be properly destroyed if we throw. */
10424 push_base_cleanups ();
10427 /* At the end of every destructor we generate code to delete the object if
10428 necessary. Do that now. */
10431 finish_destructor_body (void)
10435 /* Any return from a destructor will end up here; that way all base
10436 and member cleanups will be run when the function returns. */
10437 add_stmt (build_stmt (LABEL_EXPR
, cdtor_label
));
10439 /* In a virtual destructor, we must call delete. */
10440 if (DECL_VIRTUAL_P (current_function_decl
))
10443 tree virtual_size
= cxx_sizeof (current_class_type
);
10447 At the point of definition of a virtual destructor (including
10448 an implicit definition), non-placement operator delete shall
10449 be looked up in the scope of the destructor's class and if
10450 found shall be accessible and unambiguous. */
10451 exprstmt
= build_op_delete_call
10452 (DELETE_EXPR
, current_class_ptr
, virtual_size
,
10453 /*global_p=*/false, NULL_TREE
);
10455 if_stmt
= begin_if_stmt ();
10456 finish_if_stmt_cond (build2 (BIT_AND_EXPR
, integer_type_node
,
10457 current_in_charge_parm
,
10460 finish_expr_stmt (exprstmt
);
10461 finish_then_clause (if_stmt
);
10462 finish_if_stmt (if_stmt
);
10465 if (targetm
.cxx
.cdtor_returns_this ())
10469 val
= DECL_ARGUMENTS (current_function_decl
);
10470 val
= build2 (MODIFY_EXPR
, TREE_TYPE (val
),
10471 DECL_RESULT (current_function_decl
), val
);
10472 /* Return the address of the object. */
10473 exprstmt
= build_stmt (RETURN_EXPR
, val
);
10474 add_stmt (exprstmt
);
10478 /* Do the necessary processing for the beginning of a function body, which
10479 in this case includes member-initializers, but not the catch clauses of
10480 a function-try-block. Currently, this means opening a binding level
10481 for the member-initializers (in a ctor) and member cleanups (in a dtor).
10482 In other functions, this isn't necessary, but it doesn't hurt. */
10485 begin_function_body (void)
10489 if (processing_template_decl
)
10490 /* Do nothing now. */;
10492 /* Always keep the BLOCK node associated with the outermost pair of
10493 curly braces of a function. These are needed for correct
10494 operation of dwarfout.c. */
10495 keep_next_level (true);
10497 stmt
= begin_compound_stmt (BCS_FN_BODY
);
10499 if (processing_template_decl
)
10500 /* Do nothing now. */;
10501 else if (DECL_DESTRUCTOR_P (current_function_decl
))
10502 begin_destructor_body ();
10507 /* Do the processing for the end of a function body. Currently, this means
10508 closing out the cleanups for fully-constructed bases and members, and in
10509 the case of the destructor, deleting the object if desired. Again, this
10510 is only meaningful for [cd]tors, since they are the only functions where
10511 there is a significant distinction between the main body and any
10512 function catch clauses. Handling, say, main() return semantics here
10513 would be wrong, as flowing off the end of a function catch clause for
10514 main() would also need to return 0. */
10517 finish_function_body (tree compstmt
)
10519 /* Close the block. */
10520 finish_compound_stmt (compstmt
);
10522 if (processing_template_decl
)
10523 /* Do nothing now. */;
10524 else if (DECL_CONSTRUCTOR_P (current_function_decl
))
10525 finish_constructor_body ();
10526 else if (DECL_DESTRUCTOR_P (current_function_decl
))
10527 finish_destructor_body ();
10530 /* Finish up a function declaration and compile that function
10531 all the way to assembler language output. The free the storage
10532 for the function definition.
10534 FLAGS is a bitwise or of the following values:
10536 We just finished processing the body of an in-class inline
10537 function definition. (This processing will have taken place
10538 after the class definition is complete.) */
10541 finish_function (int flags
)
10543 tree fndecl
= current_function_decl
;
10544 tree fntype
, ctype
= NULL_TREE
;
10545 int inclass_inline
= (flags
& 2) != 0;
10548 /* When we get some parse errors, we can end up without a
10549 current_function_decl, so cope. */
10550 if (fndecl
== NULL_TREE
)
10551 return error_mark_node
;
10553 if (DECL_NONSTATIC_MEMBER_FUNCTION_P (fndecl
)
10554 && DECL_VIRTUAL_P (fndecl
)
10555 && !processing_template_decl
)
10557 tree fnclass
= DECL_CONTEXT (fndecl
);
10558 if (fndecl
== CLASSTYPE_KEY_METHOD (fnclass
))
10559 keyed_classes
= tree_cons (NULL_TREE
, fnclass
, keyed_classes
);
10562 nested
= function_depth
> 1;
10563 fntype
= TREE_TYPE (fndecl
);
10565 /* TREE_READONLY (fndecl) = 1;
10566 This caused &foo to be of type ptr-to-const-function
10567 which then got a warning when stored in a ptr-to-function variable. */
10569 gcc_assert (building_stmt_tree ());
10571 /* For a cloned function, we've already got all the code we need;
10572 there's no need to add any extra bits. */
10573 if (!DECL_CLONED_FUNCTION_P (fndecl
))
10575 if (DECL_MAIN_P (current_function_decl
))
10577 /* Make it so that `main' always returns 0 by default. */
10579 finish_return_stmt (integer_one_node
);
10581 finish_return_stmt (integer_zero_node
);
10585 /* Finish dealing with exception specifiers. */
10586 if (flag_exceptions
&& !processing_template_decl
10587 && flag_enforce_eh_specs
10588 && TYPE_RAISES_EXCEPTIONS (TREE_TYPE (current_function_decl
)))
10589 finish_eh_spec_block (TYPE_RAISES_EXCEPTIONS
10590 (TREE_TYPE (current_function_decl
)),
10591 current_eh_spec_block
);
10594 /* If we're saving up tree structure, tie off the function now. */
10595 DECL_SAVED_TREE (fndecl
) = pop_stmt_list (DECL_SAVED_TREE (fndecl
));
10597 finish_fname_decls ();
10599 /* If this function can't throw any exceptions, remember that. */
10600 if (!processing_template_decl
10601 && !cp_function_chain
->can_throw
10602 && !flag_non_call_exceptions
)
10603 TREE_NOTHROW (fndecl
) = 1;
10605 /* This must come after expand_function_end because cleanups might
10606 have declarations (from inline functions) that need to go into
10607 this function's blocks. */
10609 /* If the current binding level isn't the outermost binding level
10610 for this function, either there is a bug, or we have experienced
10611 syntax errors and the statement tree is malformed. */
10612 if (current_binding_level
->kind
!= sk_function_parms
)
10614 /* Make sure we have already experienced errors. */
10615 gcc_assert (errorcount
);
10617 /* Throw away the broken statement tree and extra binding
10619 DECL_SAVED_TREE (fndecl
) = alloc_stmt_list ();
10621 while (current_binding_level
->kind
!= sk_function_parms
)
10623 if (current_binding_level
->kind
== sk_class
)
10624 pop_nested_class ();
10626 poplevel (0, 0, 0);
10629 poplevel (1, 0, 1);
10631 /* Statements should always be full-expressions at the outermost set
10632 of curly braces for a function. */
10633 gcc_assert (stmts_are_full_exprs_p ());
10635 /* Set up the named return value optimization, if we can. Candidate
10636 variables are selected in check_return_value. */
10637 if (current_function_return_value
)
10639 tree r
= current_function_return_value
;
10642 if (r
!= error_mark_node
10643 /* This is only worth doing for fns that return in memory--and
10644 simpler, since we don't have to worry about promoted modes. */
10645 && aggregate_value_p (TREE_TYPE (TREE_TYPE (fndecl
)), fndecl
)
10646 /* Only allow this for variables declared in the outer scope of
10647 the function so we know that their lifetime always ends with a
10648 return; see g++.dg/opt/nrv6.C. We could be more flexible if
10649 we were to do this optimization in tree-ssa. */
10650 && (outer
= BLOCK_SUBBLOCKS (DECL_INITIAL (fndecl
)))
10651 /* Skip the artificial function body block. */
10652 && (outer
= BLOCK_SUBBLOCKS (outer
))
10653 && chain_member (r
, BLOCK_VARS (outer
)))
10654 finalize_nrv (&DECL_SAVED_TREE (fndecl
), r
, DECL_RESULT (fndecl
));
10656 current_function_return_value
= NULL_TREE
;
10659 /* Remember that we were in class scope. */
10660 if (current_class_name
)
10661 ctype
= current_class_type
;
10663 /* Must mark the RESULT_DECL as being in this function. */
10664 DECL_CONTEXT (DECL_RESULT (fndecl
)) = fndecl
;
10666 /* Set the BLOCK_SUPERCONTEXT of the outermost function scope to point
10667 to the FUNCTION_DECL node itself. */
10668 BLOCK_SUPERCONTEXT (DECL_INITIAL (fndecl
)) = fndecl
;
10670 /* Save away current state, if appropriate. */
10671 if (!processing_template_decl
)
10672 save_function_data (fndecl
);
10674 /* Complain if there's just no return statement. */
10675 if (warn_return_type
10676 && TREE_CODE (TREE_TYPE (fntype
)) != VOID_TYPE
10677 && !dependent_type_p (TREE_TYPE (fntype
))
10678 && !current_function_returns_value
&& !current_function_returns_null
10679 /* Don't complain if we abort or throw. */
10680 && !current_function_returns_abnormally
10681 && !DECL_NAME (DECL_RESULT (fndecl
))
10682 /* Normally, with -Wreturn-type, flow will complain. Unless we're an
10683 inline function, as we might never be compiled separately. */
10684 && (DECL_INLINE (fndecl
) || processing_template_decl
)
10685 /* Structor return values (if any) are set by the compiler. */
10686 && !DECL_CONSTRUCTOR_P (fndecl
)
10687 && !DECL_DESTRUCTOR_P (fndecl
))
10688 warning ("no return statement in function returning non-void");
10690 /* Store the end of the function, so that we get good line number
10691 info for the epilogue. */
10692 cfun
->function_end_locus
= input_location
;
10694 /* Genericize before inlining. */
10695 if (!processing_template_decl
)
10697 struct language_function
*f
= DECL_SAVED_FUNCTION_DATA (fndecl
);
10698 cp_genericize (fndecl
);
10699 /* Clear out the bits we don't need. */
10700 f
->x_current_class_ptr
= NULL
;
10701 f
->x_current_class_ref
= NULL
;
10702 f
->x_eh_spec_block
= NULL
;
10703 f
->x_in_charge_parm
= NULL
;
10704 f
->x_vtt_parm
= NULL
;
10705 f
->x_return_value
= NULL
;
10706 f
->bindings
= NULL
;
10708 /* Handle attribute((warn_unused_result)). Relies on gimple input. */
10709 c_warn_unused_result (&DECL_SAVED_TREE (fndecl
));
10711 /* Clear out the bits we don't need. */
10712 local_names
= NULL
;
10713 named_label_uses
= NULL
;
10715 /* We're leaving the context of this function, so zap cfun. It's still in
10716 DECL_STRUCT_FUNCTION, and we'll restore it in tree_rest_of_compilation. */
10718 current_function_decl
= NULL
;
10720 /* If this is an in-class inline definition, we may have to pop the
10721 bindings for the template parameters that we added in
10722 maybe_begin_member_template_processing when start_function was
10724 if (inclass_inline
)
10725 maybe_end_member_template_processing ();
10727 /* Leave the scope of the class. */
10729 pop_nested_class ();
10735 /* Let the error reporting routines know that we're outside a
10736 function. For a nested function, this value is used in
10737 cxx_pop_function_context and then reset via pop_function_context. */
10738 current_function_decl
= NULL_TREE
;
10743 /* Create the FUNCTION_DECL for a function definition.
10744 DECLSPECS and DECLARATOR are the parts of the declaration;
10745 they describe the return type and the name of the function,
10746 but twisted together in a fashion that parallels the syntax of C.
10748 This function creates a binding context for the function body
10749 as well as setting up the FUNCTION_DECL in current_function_decl.
10751 Returns a FUNCTION_DECL on success.
10753 If the DECLARATOR is not suitable for a function (it defines a datum
10754 instead), we return 0, which tells yyparse to report a parse error.
10756 May return void_type_node indicating that this method is actually
10757 a friend. See grokfield for more details.
10759 Came here with a `.pushlevel' .
10761 DO NOT MAKE ANY CHANGES TO THIS CODE WITHOUT MAKING CORRESPONDING
10762 CHANGES TO CODE IN `grokfield'. */
10765 start_method (cp_decl_specifier_seq
*declspecs
,
10766 const cp_declarator
*declarator
, tree attrlist
)
10768 tree fndecl
= grokdeclarator (declarator
, declspecs
, MEMFUNCDEF
, 0,
10771 if (fndecl
== error_mark_node
)
10772 return error_mark_node
;
10774 if (fndecl
== NULL
|| TREE_CODE (fndecl
) != FUNCTION_DECL
)
10776 error ("invalid member function declaration");
10777 return error_mark_node
;
10781 cplus_decl_attributes (&fndecl
, attrlist
, 0);
10783 /* Pass friends other than inline friend functions back. */
10784 if (fndecl
== void_type_node
)
10787 if (DECL_IN_AGGR_P (fndecl
))
10789 if (DECL_CONTEXT (fndecl
)
10790 && TREE_CODE( DECL_CONTEXT (fndecl
)) != NAMESPACE_DECL
)
10791 error ("%qD is already defined in class %qT", fndecl
,
10792 DECL_CONTEXT (fndecl
));
10793 return void_type_node
;
10796 check_template_shadow (fndecl
);
10798 DECL_DECLARED_INLINE_P (fndecl
) = 1;
10799 if (flag_default_inline
)
10800 DECL_INLINE (fndecl
) = 1;
10802 /* We process method specializations in finish_struct_1. */
10803 if (processing_template_decl
&& !DECL_TEMPLATE_SPECIALIZATION (fndecl
))
10805 fndecl
= push_template_decl (fndecl
);
10806 if (fndecl
== error_mark_node
)
10810 if (! DECL_FRIEND_P (fndecl
))
10812 if (TREE_CHAIN (fndecl
))
10814 fndecl
= copy_node (fndecl
);
10815 TREE_CHAIN (fndecl
) = NULL_TREE
;
10817 grok_special_member_properties (fndecl
);
10820 cp_finish_decl (fndecl
, NULL_TREE
, NULL_TREE
, 0);
10822 /* Make a place for the parms. */
10823 begin_scope (sk_function_parms
, fndecl
);
10825 DECL_IN_AGGR_P (fndecl
) = 1;
10829 /* Go through the motions of finishing a function definition.
10830 We don't compile this method until after the whole class has
10833 FINISH_METHOD must return something that looks as though it
10834 came from GROKFIELD (since we are defining a method, after all).
10836 This is called after parsing the body of the function definition.
10837 STMTS is the chain of statements that makes up the function body.
10839 DECL is the ..._DECL that `start_method' provided. */
10842 finish_method (tree decl
)
10844 tree fndecl
= decl
;
10849 if (decl
== void_type_node
)
10852 old_initial
= DECL_INITIAL (fndecl
);
10854 /* Undo the level for the parms (from start_method).
10855 This is like poplevel, but it causes nothing to be
10856 saved. Saving information here confuses symbol-table
10857 output routines. Besides, this information will
10858 be correctly output when this method is actually
10861 /* Clear out the meanings of the local variables of this level;
10862 also record in each decl which block it belongs to. */
10864 for (link
= current_binding_level
->names
; link
; link
= TREE_CHAIN (link
))
10866 if (DECL_NAME (link
) != NULL_TREE
)
10867 pop_binding (DECL_NAME (link
), link
);
10868 gcc_assert (TREE_CODE (link
) != FUNCTION_DECL
);
10869 DECL_CONTEXT (link
) = NULL_TREE
;
10872 poplevel (0, 0, 0);
10874 DECL_INITIAL (fndecl
) = old_initial
;
10876 /* We used to check if the context of FNDECL was different from
10877 current_class_type as another way to get inside here. This didn't work
10878 for String.cc in libg++. */
10879 if (DECL_FRIEND_P (fndecl
))
10881 VEC_safe_push (tree
, CLASSTYPE_INLINE_FRIENDS (current_class_type
),
10883 decl
= void_type_node
;
10890 /* VAR is a VAR_DECL. If its type is incomplete, remember VAR so that
10891 we can lay it out later, when and if its type becomes complete. */
10894 maybe_register_incomplete_var (tree var
)
10896 gcc_assert (TREE_CODE (var
) == VAR_DECL
);
10898 /* Keep track of variables with incomplete types. */
10899 if (!processing_template_decl
&& TREE_TYPE (var
) != error_mark_node
10900 && DECL_EXTERNAL (var
))
10902 tree inner_type
= TREE_TYPE (var
);
10904 while (TREE_CODE (inner_type
) == ARRAY_TYPE
)
10905 inner_type
= TREE_TYPE (inner_type
);
10906 inner_type
= TYPE_MAIN_VARIANT (inner_type
);
10908 if ((!COMPLETE_TYPE_P (inner_type
) && CLASS_TYPE_P (inner_type
))
10909 /* RTTI TD entries are created while defining the type_info. */
10910 || (TYPE_LANG_SPECIFIC (inner_type
)
10911 && TYPE_BEING_DEFINED (inner_type
)))
10912 incomplete_vars
= tree_cons (inner_type
, var
, incomplete_vars
);
10916 /* Called when a class type (given by TYPE) is defined. If there are
10917 any existing VAR_DECLs whose type hsa been completed by this
10918 declaration, update them now. */
10921 complete_vars (tree type
)
10923 tree
*list
= &incomplete_vars
;
10925 gcc_assert (CLASS_TYPE_P (type
));
10928 if (same_type_p (type
, TREE_PURPOSE (*list
)))
10930 tree var
= TREE_VALUE (*list
);
10931 /* Complete the type of the variable. The VAR_DECL itself
10932 will be laid out in expand_expr. */
10933 complete_type (TREE_TYPE (var
));
10934 /* Remove this entry from the list. */
10935 *list
= TREE_CHAIN (*list
);
10938 list
= &TREE_CHAIN (*list
);
10941 /* Check for pending declarations which may have abstract type. */
10942 complete_type_check_abstract (type
);
10945 /* If DECL is of a type which needs a cleanup, build that cleanup
10949 cxx_maybe_build_cleanup (tree decl
)
10951 tree type
= TREE_TYPE (decl
);
10953 if (type
!= error_mark_node
&& TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type
))
10955 int flags
= LOOKUP_NORMAL
|LOOKUP_DESTRUCTOR
;
10957 bool has_vbases
= (TREE_CODE (type
) == RECORD_TYPE
10958 && CLASSTYPE_VBASECLASSES (type
));
10960 if (TREE_CODE (type
) == ARRAY_TYPE
)
10964 cxx_mark_addressable (decl
);
10965 rval
= build_unary_op (ADDR_EXPR
, decl
, 0);
10968 /* Optimize for space over speed here. */
10969 if (!has_vbases
|| flag_expensive_optimizations
)
10970 flags
|= LOOKUP_NONVIRTUAL
;
10972 rval
= build_delete (TREE_TYPE (rval
), rval
,
10973 sfk_complete_destructor
, flags
, 0);
10975 if (has_vbases
&& !TYPE_HAS_DESTRUCTOR (type
))
10976 rval
= build_compound_expr (rval
, build_vbase_delete (type
, decl
));
10983 /* When a stmt has been parsed, this function is called. */
10990 /* DECL was originally constructed as a non-static member function,
10991 but turned out to be static. Update it accordingly. */
10994 revert_static_member_fn (tree decl
)
10997 tree function
= TREE_TYPE (decl
);
10998 tree args
= TYPE_ARG_TYPES (function
);
11000 if (cp_type_quals (TREE_TYPE (TREE_VALUE (args
)))
11001 != TYPE_UNQUALIFIED
)
11002 error ("static member function %q#D declared with type qualifiers", decl
);
11004 args
= TREE_CHAIN (args
);
11005 tmp
= build_function_type (TREE_TYPE (function
), args
);
11006 tmp
= build_qualified_type (tmp
, cp_type_quals (function
));
11007 tmp
= build_exception_variant (tmp
,
11008 TYPE_RAISES_EXCEPTIONS (function
));
11009 TREE_TYPE (decl
) = tmp
;
11010 if (DECL_ARGUMENTS (decl
))
11011 DECL_ARGUMENTS (decl
) = TREE_CHAIN (DECL_ARGUMENTS (decl
));
11012 DECL_STATIC_FUNCTION_P (decl
) = 1;
11015 /* Initialize the variables used during compilation of a C++
11019 cxx_push_function_context (struct function
* f
)
11021 struct language_function
*p
= GGC_CNEW (struct language_function
);
11024 /* Whenever we start a new function, we destroy temporaries in the
11026 current_stmt_tree ()->stmts_are_full_exprs_p
= 1;
11032 if (DECL_SAVED_FUNCTION_DATA (fn
))
11034 /* If we already parsed this function, and we're just expanding it
11035 now, restore saved state. */
11036 *cp_function_chain
= *DECL_SAVED_FUNCTION_DATA (fn
);
11038 /* We don't need the saved data anymore. Unless this is an inline
11039 function; we need the named return value info for
11040 declare_return_variable. */
11041 if (! DECL_INLINE (fn
))
11042 DECL_SAVED_FUNCTION_DATA (fn
) = NULL
;
11047 /* Free the language-specific parts of F, now that we've finished
11048 compiling the function. */
11051 cxx_pop_function_context (struct function
* f
)
11056 /* Return which tree structure is used by T, or TS_CP_GENERIC if T is
11057 one of the language-independent trees. */
11059 enum cp_tree_node_structure_enum
11060 cp_tree_node_structure (union lang_tree_node
* t
)
11062 switch (TREE_CODE (&t
->generic
))
11064 case DEFAULT_ARG
: return TS_CP_DEFAULT_ARG
;
11065 case IDENTIFIER_NODE
: return TS_CP_IDENTIFIER
;
11066 case OVERLOAD
: return TS_CP_OVERLOAD
;
11067 case TEMPLATE_PARM_INDEX
: return TS_CP_TPI
;
11068 case TINST_LEVEL
: return TS_CP_TINST_LEVEL
;
11069 case PTRMEM_CST
: return TS_CP_PTRMEM
;
11070 case BASELINK
: return TS_CP_BASELINK
;
11071 default: return TS_CP_GENERIC
;
11075 /* Build the void_list_node (void_type_node having been created). */
11077 build_void_list_node (void)
11079 tree t
= build_tree_list (NULL_TREE
, void_type_node
);
11084 cp_missing_noreturn_ok_p (tree decl
)
11086 /* A missing noreturn is ok for the `main' function. */
11087 return DECL_MAIN_P (decl
);
11090 /* Return the COMDAT group into which DECL should be placed. */
11093 cxx_comdat_group (tree decl
)
11097 /* Virtual tables, construction virtual tables, and virtual table
11098 tables all go in a single COMDAT group, named after the primary
11100 if (TREE_CODE (decl
) == VAR_DECL
&& DECL_VTABLE_OR_VTT_P (decl
))
11101 name
= DECL_ASSEMBLER_NAME (CLASSTYPE_VTABLES (DECL_CONTEXT (decl
)));
11102 /* For all other DECLs, the COMDAT group is the mangled name of the
11103 declaration itself. */
11105 name
= DECL_ASSEMBLER_NAME (decl
);
11107 return IDENTIFIER_POINTER (name
);
11110 #include "gt-cp-decl.h"