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
, tag_scope
, 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
*);
125 /* Erroneous argument lists can use this *IFF* they do not modify it. */
126 tree error_mark_list
;
128 /* The following symbols are subsumed in the cp_global_trees array, and
129 listed here individually for documentation purposes.
132 tree wchar_decl_node;
134 tree vtable_entry_type;
135 tree delta_type_node;
136 tree __t_desc_type_node;
137 tree ti_desc_type_node;
138 tree bltn_desc_type_node, ptr_desc_type_node;
139 tree ary_desc_type_node, func_desc_type_node, enum_desc_type_node;
140 tree class_desc_type_node, si_class_desc_type_node, vmi_class_desc_type_node;
141 tree ptm_desc_type_node;
142 tree base_desc_type_node;
144 tree class_type_node;
145 tree unknown_type_node;
147 Array type `vtable_entry_type[]'
150 tree vtbl_ptr_type_node;
157 A FUNCTION_DECL which can call `abort'. Not necessarily the
158 one that the user will declare, but sufficient to be called
159 by routines that want to abort the program.
163 The FUNCTION_DECL for the default `::operator delete'.
165 tree global_delete_fndecl;
168 tree type_info_type_node, tinfo_decl_id, tinfo_decl_type;
173 tree cp_global_trees
[CPTI_MAX
];
175 /* Indicates that there is a type value in some namespace, although
176 that is not necessarily in scope at the moment. */
178 tree global_type_node
;
180 /* The node that holds the "name" of the global scope. */
181 tree global_scope_name
;
183 /* Used only for jumps to as-yet undefined labels, since jumps to
184 defined labels can have their validity checked immediately. */
186 struct named_label_use_list
GTY(())
188 struct cp_binding_level
*binding_level
;
191 location_t o_goto_locus
;
192 struct named_label_use_list
*next
;
195 #define named_label_uses cp_function_chain->x_named_label_uses
197 #define local_names cp_function_chain->x_local_names
199 /* A list of objects which have constructors or destructors
200 which reside in the global scope. The decl is stored in
201 the TREE_VALUE slot and the initializer is stored
202 in the TREE_PURPOSE slot. */
203 tree static_aggregates
;
207 /* A node for the integer constants 2, and 3. */
209 tree integer_two_node
, integer_three_node
;
211 /* A list of all LABEL_DECLs in the function that have names. Here so
212 we can clear out their names' definitions at the end of the
213 function, and so we can check the validity of jumps to these labels. */
215 struct named_label_list
GTY(())
217 struct cp_binding_level
*binding_level
;
222 struct named_label_list
*next
;
223 unsigned int in_try_scope
: 1;
224 unsigned int in_catch_scope
: 1;
227 #define named_labels cp_function_chain->x_named_labels
229 /* The number of function bodies which we are currently processing.
230 (Zero if we are at namespace scope, one inside the body of a
231 function, two inside the body of a function in a local class, etc.) */
234 /* States indicating how grokdeclarator() should handle declspecs marked
235 with __attribute__((deprecated)). An object declared as
236 __attribute__((deprecated)) suppresses warnings of uses of other
239 enum deprecated_states
{
244 static enum deprecated_states deprecated_state
= DEPRECATED_NORMAL
;
246 /* True if a declaration with an `extern' linkage specifier is being
248 bool have_extern_spec
;
251 /* A TREE_LIST of VAR_DECLs. The TREE_PURPOSE is a RECORD_TYPE or
252 UNION_TYPE; the TREE_VALUE is a VAR_DECL with that type. At the
253 time the VAR_DECL was declared, the type was incomplete. */
255 static GTY(()) tree incomplete_vars
;
257 /* Returns the kind of template specialization we are currently
258 processing, given that it's declaration contained N_CLASS_SCOPES
259 explicit scope qualifications. */
262 current_tmpl_spec_kind (int n_class_scopes
)
264 int n_template_parm_scopes
= 0;
265 int seen_specialization_p
= 0;
266 int innermost_specialization_p
= 0;
267 struct cp_binding_level
*b
;
269 /* Scan through the template parameter scopes. */
270 for (b
= current_binding_level
;
271 b
->kind
== sk_template_parms
;
274 /* If we see a specialization scope inside a parameter scope,
275 then something is wrong. That corresponds to a declaration
278 template <class T> template <> ...
280 which is always invalid since [temp.expl.spec] forbids the
281 specialization of a class member template if the enclosing
282 class templates are not explicitly specialized as well. */
283 if (b
->explicit_spec_p
)
285 if (n_template_parm_scopes
== 0)
286 innermost_specialization_p
= 1;
288 seen_specialization_p
= 1;
290 else if (seen_specialization_p
== 1)
291 return tsk_invalid_member_spec
;
293 ++n_template_parm_scopes
;
296 /* Handle explicit instantiations. */
297 if (processing_explicit_instantiation
)
299 if (n_template_parm_scopes
!= 0)
300 /* We've seen a template parameter list during an explicit
301 instantiation. For example:
303 template <class T> template void f(int);
305 This is erroneous. */
306 return tsk_invalid_expl_inst
;
308 return tsk_expl_inst
;
311 if (n_template_parm_scopes
< n_class_scopes
)
312 /* We've not seen enough template headers to match all the
313 specialized classes present. For example:
315 template <class T> void R<T>::S<T>::f(int);
317 This is invalid; there needs to be one set of template
318 parameters for each class. */
319 return tsk_insufficient_parms
;
320 else if (n_template_parm_scopes
== n_class_scopes
)
321 /* We're processing a non-template declaration (even though it may
322 be a member of a template class.) For example:
324 template <class T> void S<T>::f(int);
326 The `class T' maches the `S<T>', leaving no template headers
327 corresponding to the `f'. */
329 else if (n_template_parm_scopes
> n_class_scopes
+ 1)
330 /* We've got too many template headers. For example:
332 template <> template <class T> void f (T);
334 There need to be more enclosing classes. */
335 return tsk_excessive_parms
;
337 /* This must be a template. It's of the form:
339 template <class T> template <class U> void S<T>::f(U);
341 This is a specialization if the innermost level was a
342 specialization; otherwise it's just a definition of the
344 return innermost_specialization_p
? tsk_expl_spec
: tsk_template
;
347 /* Exit the current scope. */
355 /* When a label goes out of scope, check to see if that label was used
356 in a valid manner, and issue any appropriate warnings or errors. */
359 pop_label (tree label
, tree old_value
)
361 if (!processing_template_decl
)
363 if (DECL_INITIAL (label
) == NULL_TREE
)
367 cp_error_at ("label %qD used but not defined", label
);
368 #ifdef USE_MAPPED_LOCATION
369 location
= input_location
; /* FIXME want (input_filename, (line)0) */
371 location
.file
= input_filename
;
374 /* Avoid crashing later. */
375 define_label (location
, DECL_NAME (label
));
377 else if (warn_unused_label
&& !TREE_USED (label
))
378 cp_warning_at ("label %qD defined but not used", label
);
381 SET_IDENTIFIER_LABEL_VALUE (DECL_NAME (label
), old_value
);
384 /* At the end of a function, all labels declared within the function
385 go out of scope. BLOCK is the top-level block for the
389 pop_labels (tree block
)
391 struct named_label_list
*link
;
393 /* Clear out the definitions of all label names, since their scopes
395 for (link
= named_labels
; link
; link
= link
->next
)
397 pop_label (link
->label_decl
, link
->old_value
);
398 /* Put the labels into the "variables" of the top-level block,
399 so debugger can see them. */
400 TREE_CHAIN (link
->label_decl
) = BLOCK_VARS (block
);
401 BLOCK_VARS (block
) = link
->label_decl
;
407 /* The following two routines are used to interface to Objective-C++.
408 The binding level is purposely treated as an opaque type. */
411 objc_get_current_scope (void)
413 return current_binding_level
;
416 /* The following routine is used by the NeXT-style SJLJ exceptions;
417 variables get marked 'volatile' so as to not be clobbered by
418 _setjmp()/_longjmp() calls. All variables in the current scope,
419 as well as parent scopes up to (but not including) ENCLOSING_BLK
420 shall be thusly marked. */
423 objc_mark_locals_volatile (void *enclosing_blk
)
425 struct cp_binding_level
*scope
;
427 for (scope
= current_binding_level
;
428 scope
&& scope
!= enclosing_blk
&& scope
->kind
== sk_block
;
429 scope
= scope
->level_chain
)
433 for (decl
= scope
->names
; decl
; decl
= TREE_CHAIN (decl
))
435 if (TREE_CODE (decl
) == VAR_DECL
)
437 DECL_REGISTER (decl
) = 0;
438 TREE_THIS_VOLATILE (decl
) = 1;
444 /* Exit a binding level.
445 Pop the level off, and restore the state of the identifier-decl mappings
446 that were in effect when this level was entered.
448 If KEEP == 1, this level had explicit declarations, so
449 and create a "block" (a BLOCK node) for the level
450 to record its declarations and subblocks for symbol table output.
452 If FUNCTIONBODY is nonzero, this level is the body of a function,
453 so create a block as if KEEP were set and also clear out all
456 If REVERSE is nonzero, reverse the order of decls before putting
457 them into the BLOCK. */
460 poplevel (int keep
, int reverse
, int functionbody
)
463 /* The chain of decls was accumulated in reverse order.
464 Put it into forward order, just for cleanliness. */
466 int tmp
= functionbody
;
467 int real_functionbody
;
471 int leaving_for_scope
;
474 timevar_push (TV_NAME_LOOKUP
);
479 gcc_assert (current_binding_level
->kind
!= sk_class
);
481 real_functionbody
= (current_binding_level
->kind
== sk_cleanup
482 ? ((functionbody
= 0), tmp
) : functionbody
);
483 subblocks
= functionbody
>= 0 ? current_binding_level
->blocks
: 0;
485 gcc_assert (!VEC_length(cp_class_binding
,
486 current_binding_level
->class_shadowed
));
488 /* We used to use KEEP == 2 to indicate that the new block should go
489 at the beginning of the list of blocks at this binding level,
490 rather than the end. This hack is no longer used. */
491 gcc_assert (keep
== 0 || keep
== 1);
493 if (current_binding_level
->keep
)
496 /* Any uses of undefined labels, and any defined labels, now operate
497 under constraints of next binding contour. */
498 if (cfun
&& !functionbody
)
500 struct cp_binding_level
*level_chain
;
501 level_chain
= current_binding_level
->level_chain
;
504 struct named_label_use_list
*uses
;
505 struct named_label_list
*labels
;
506 for (labels
= named_labels
; labels
; labels
= labels
->next
)
507 if (labels
->binding_level
== current_binding_level
)
510 if (current_binding_level
->kind
== sk_try
)
511 labels
->in_try_scope
= 1;
512 if (current_binding_level
->kind
== sk_catch
)
513 labels
->in_catch_scope
= 1;
514 for (decl
= labels
->names_in_scope
; decl
;
515 decl
= TREE_CHAIN (decl
))
516 if (decl_jump_unsafe (decl
))
517 labels
->bad_decls
= tree_cons (NULL_TREE
, decl
,
519 labels
->binding_level
= level_chain
;
520 labels
->names_in_scope
= level_chain
->names
;
523 for (uses
= named_label_uses
; uses
; uses
= uses
->next
)
524 if (uses
->binding_level
== current_binding_level
)
526 uses
->binding_level
= level_chain
;
527 uses
->names_in_scope
= level_chain
->names
;
532 /* Get the decls in the order they were written.
533 Usually current_binding_level->names is in reverse order.
534 But parameter decls were previously put in forward order. */
537 current_binding_level
->names
538 = decls
= nreverse (current_binding_level
->names
);
540 decls
= current_binding_level
->names
;
542 /* If there were any declarations or structure tags in that level,
543 or if this level is a function body,
544 create a BLOCK to record them for the life of this function. */
546 if (keep
== 1 || functionbody
)
547 block
= make_node (BLOCK
);
548 if (block
!= NULL_TREE
)
550 BLOCK_VARS (block
) = decls
;
551 BLOCK_SUBBLOCKS (block
) = subblocks
;
554 /* In each subblock, record that this is its superior. */
556 for (link
= subblocks
; link
; link
= TREE_CHAIN (link
))
557 BLOCK_SUPERCONTEXT (link
) = block
;
559 /* We still support the old for-scope rules, whereby the variables
560 in a for-init statement were in scope after the for-statement
561 ended. We only use the new rules if flag_new_for_scope is
564 = current_binding_level
->kind
== sk_for
&& flag_new_for_scope
== 1;
566 /* Before we remove the declarations first check for unused variables. */
567 if (warn_unused_variable
568 && !processing_template_decl
)
569 for (decl
= getdecls (); decl
; decl
= TREE_CHAIN (decl
))
570 if (TREE_CODE (decl
) == VAR_DECL
571 && ! TREE_USED (decl
)
572 && ! DECL_IN_SYSTEM_HEADER (decl
)
573 && DECL_NAME (decl
) && ! DECL_ARTIFICIAL (decl
))
574 warning ("%Junused variable %qD", decl
, decl
);
576 /* Remove declarations for all the DECLs in this level. */
577 for (link
= decls
; link
; link
= TREE_CHAIN (link
))
579 if (leaving_for_scope
&& TREE_CODE (link
) == VAR_DECL
582 tree name
= DECL_NAME (link
);
586 ob
= outer_binding (name
,
587 IDENTIFIER_BINDING (name
),
590 ns_binding
= IDENTIFIER_NAMESPACE_VALUE (name
);
592 ns_binding
= NULL_TREE
;
594 if (ob
&& ob
->scope
== current_binding_level
->level_chain
)
595 /* We have something like:
600 and we are leaving the `for' scope. There's no reason to
601 keep the binding of the inner `i' in this case. */
602 pop_binding (name
, link
);
603 else if ((ob
&& (TREE_CODE (ob
->value
) == TYPE_DECL
))
604 || (ns_binding
&& TREE_CODE (ns_binding
) == TYPE_DECL
))
605 /* Here, we have something like:
613 We must pop the for-scope binding so we know what's a
614 type and what isn't. */
615 pop_binding (name
, link
);
618 /* Mark this VAR_DECL as dead so that we can tell we left it
619 there only for backward compatibility. */
620 DECL_DEAD_FOR_LOCAL (link
) = 1;
622 /* Keep track of what should have happened when we
623 popped the binding. */
625 DECL_SHADOWED_FOR_VAR (link
) = ob
->value
;
627 /* Add it to the list of dead variables in the next
628 outermost binding to that we can remove these when we
629 leave that binding. */
630 current_binding_level
->level_chain
->dead_vars_from_for
631 = tree_cons (NULL_TREE
, link
,
632 current_binding_level
->level_chain
->
635 /* Although we don't pop the cxx_binding, we do clear
636 its SCOPE since the scope is going away now. */
637 IDENTIFIER_BINDING (name
)->scope
638 = current_binding_level
->level_chain
;
645 /* Remove the binding. */
648 if (TREE_CODE (decl
) == TREE_LIST
)
649 decl
= TREE_VALUE (decl
);
652 if (TREE_CODE (name
) == OVERLOAD
)
653 name
= OVL_FUNCTION (name
);
655 gcc_assert (DECL_P (name
));
656 pop_binding (DECL_NAME (name
), decl
);
660 /* Remove declarations for any `for' variables from inner scopes
661 that we kept around. */
662 for (link
= current_binding_level
->dead_vars_from_for
;
663 link
; link
= TREE_CHAIN (link
))
664 pop_binding (DECL_NAME (TREE_VALUE (link
)), TREE_VALUE (link
));
666 /* Restore the IDENTIFIER_TYPE_VALUEs. */
667 for (link
= current_binding_level
->type_shadowed
;
668 link
; link
= TREE_CHAIN (link
))
669 SET_IDENTIFIER_TYPE_VALUE (TREE_PURPOSE (link
), TREE_VALUE (link
));
671 /* Restore the IDENTIFIER_LABEL_VALUEs for local labels. */
672 for (link
= current_binding_level
->shadowed_labels
;
674 link
= TREE_CHAIN (link
))
675 pop_label (TREE_VALUE (link
), TREE_PURPOSE (link
));
677 /* There may be OVERLOADs (wrapped in TREE_LISTs) on the BLOCK_VARs
678 list if a `using' declaration put them there. The debugging
679 back-ends won't understand OVERLOAD, so we remove them here.
680 Because the BLOCK_VARS are (temporarily) shared with
681 CURRENT_BINDING_LEVEL->NAMES we must do this fixup after we have
682 popped all the bindings. */
687 for (d
= &BLOCK_VARS (block
); *d
; )
689 if (TREE_CODE (*d
) == TREE_LIST
)
690 *d
= TREE_CHAIN (*d
);
692 d
= &TREE_CHAIN (*d
);
696 /* If the level being exited is the top level of a function,
697 check over all the labels. */
700 /* Since this is the top level block of a function, the vars are
701 the function's parameters. Don't leave them in the BLOCK
702 because they are found in the FUNCTION_DECL instead. */
703 BLOCK_VARS (block
) = 0;
707 kind
= current_binding_level
->kind
;
708 if (kind
== sk_cleanup
)
712 /* If this is a temporary binding created for a cleanup, then we'll
713 have pushed a statement list level. Pop that, create a new
714 BIND_EXPR for the block, and insert it into the stream. */
715 stmt
= pop_stmt_list (current_binding_level
->statement_list
);
716 stmt
= c_build_bind_expr (block
, stmt
);
722 DECL_INITIAL (current_function_decl
) = block
;
724 current_binding_level
->blocks
725 = chainon (current_binding_level
->blocks
, block
);
727 /* If we did not make a block for the level just exited,
728 any blocks made for inner levels
729 (since they cannot be recorded as subblocks in that level)
730 must be carried forward so they will later become subblocks
731 of something else. */
733 current_binding_level
->blocks
734 = chainon (current_binding_level
->blocks
, subblocks
);
736 /* Each and every BLOCK node created here in `poplevel' is important
737 (e.g. for proper debugging information) so if we created one
738 earlier, mark it as "used". */
740 TREE_USED (block
) = 1;
742 /* All temporary bindings created for cleanups are popped silently. */
743 if (kind
== sk_cleanup
)
746 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP
, block
);
749 /* Delete the node BLOCK from the current binding level.
750 This is used for the block inside a stmt expr ({...})
751 so that the block can be reinserted where appropriate. */
754 delete_block (tree block
)
757 if (current_binding_level
->blocks
== block
)
758 current_binding_level
->blocks
= TREE_CHAIN (block
);
759 for (t
= current_binding_level
->blocks
; t
;)
761 if (TREE_CHAIN (t
) == block
)
762 TREE_CHAIN (t
) = TREE_CHAIN (block
);
766 TREE_CHAIN (block
) = NULL_TREE
;
767 /* Clear TREE_USED which is always set by poplevel.
768 The flag is set again if insert_block is called. */
769 TREE_USED (block
) = 0;
772 /* Insert BLOCK at the end of the list of subblocks of the
773 current binding level. This is used when a BIND_EXPR is expanded,
774 to handle the BLOCK node inside the BIND_EXPR. */
777 insert_block (tree block
)
779 TREE_USED (block
) = 1;
780 current_binding_level
->blocks
781 = chainon (current_binding_level
->blocks
, block
);
784 /* Returns nonzero if T is a virtual function table. */
787 vtable_decl_p (tree t
, void* data ATTRIBUTE_UNUSED
)
789 return (TREE_CODE (t
) == VAR_DECL
&& DECL_VIRTUAL_P (t
));
792 /* Returns nonzero if T is a TYPE_DECL for a type with virtual
796 vtype_decl_p (tree t
, void *data ATTRIBUTE_UNUSED
)
798 return (TREE_CODE (t
) == TYPE_DECL
799 && TREE_CODE (TREE_TYPE (t
)) == RECORD_TYPE
800 && TYPE_POLYMORPHIC_P (TREE_TYPE (t
)));
803 struct walk_globals_data
{
809 /* Walk the vtable declarations in NAMESPACE. Whenever one is found
810 for which P returns nonzero, call F with its address. If any call
811 to F returns a nonzero value, return a nonzero value. */
814 walk_vtables_r (tree
namespace, void* data
)
816 struct walk_globals_data
* wgd
= (struct walk_globals_data
*) data
;
817 walk_globals_fn f
= wgd
->f
;
819 tree decl
= NAMESPACE_LEVEL (namespace)->vtables
;
822 for (; decl
; decl
= TREE_CHAIN (decl
))
823 result
|= (*f
) (&decl
, d
);
828 /* Walk the vtable declarations. Whenever one is found for which P
829 returns nonzero, call F with its address. If any call to F
830 returns a nonzero value, return a nonzero value. */
832 walk_vtables (walk_globals_pred p
, walk_globals_fn f
, void *data
)
834 struct walk_globals_data wgd
;
839 return walk_namespaces (walk_vtables_r
, &wgd
);
842 /* Walk all the namespaces contained NAMESPACE, including NAMESPACE
843 itself, calling F for each. The DATA is passed to F as well. */
846 walk_namespaces_r (tree
namespace, walk_namespaces_fn f
, void* data
)
849 tree current
= NAMESPACE_LEVEL (namespace)->namespaces
;
851 result
|= (*f
) (namespace, data
);
853 for (; current
; current
= TREE_CHAIN (current
))
854 result
|= walk_namespaces_r (current
, f
, data
);
859 /* Walk all the namespaces, calling F for each. The DATA is passed to
863 walk_namespaces (walk_namespaces_fn f
, void* data
)
865 return walk_namespaces_r (global_namespace
, f
, data
);
868 /* Walk the global declarations in NAMESPACE. Whenever one is found
869 for which P returns nonzero, call F with its address. If any call
870 to F returns a nonzero value, return a nonzero value. */
873 walk_globals_r (tree
namespace, void* data
)
875 struct walk_globals_data
* wgd
= (struct walk_globals_data
*) data
;
876 walk_globals_pred p
= wgd
->p
;
877 walk_globals_fn f
= wgd
->f
;
882 t
= &NAMESPACE_LEVEL (namespace)->names
;
889 result
|= (*f
) (t
, d
);
891 /* If F changed *T, then *T still points at the next item to
894 t
= &TREE_CHAIN (*t
);
900 /* Walk the global declarations. Whenever one is found for which P
901 returns true, call F with its address. If any call to F
902 returns true, return true. */
905 walk_globals (walk_globals_pred p
, walk_globals_fn f
, void *data
)
907 struct walk_globals_data wgd
;
912 return walk_namespaces (walk_globals_r
, &wgd
);
915 /* Call wrapup_globals_declarations for the globals in NAMESPACE. If
916 DATA is non-NULL, this is the last time we will call
917 wrapup_global_declarations for this NAMESPACE. */
920 wrapup_globals_for_namespace (tree
namespace, void* data
)
922 struct cp_binding_level
*level
= NAMESPACE_LEVEL (namespace);
923 varray_type statics
= level
->static_decls
;
924 tree
*vec
= &VARRAY_TREE (statics
, 0);
925 int len
= VARRAY_ACTIVE_SIZE (statics
);
926 int last_time
= (data
!= 0);
930 check_global_declarations (vec
, len
);
934 /* Write out any globals that need to be output. */
935 return wrapup_global_declarations (vec
, len
);
939 /* In C++, you don't have to write `struct S' to refer to `S'; you
940 can just use `S'. We accomplish this by creating a TYPE_DECL as
941 if the user had written `typedef struct S S'. Create and return
942 the TYPE_DECL for TYPE. */
945 create_implicit_typedef (tree name
, tree type
)
949 decl
= build_decl (TYPE_DECL
, name
, type
);
950 DECL_ARTIFICIAL (decl
) = 1;
951 /* There are other implicit type declarations, like the one *within*
952 a class that allows you to write `S::S'. We must distinguish
954 SET_DECL_IMPLICIT_TYPEDEF_P (decl
);
955 TYPE_NAME (type
) = decl
;
960 /* Remember a local name for name-mangling purposes. */
963 push_local_name (tree decl
)
968 timevar_push (TV_NAME_LOOKUP
);
970 VARRAY_TREE_INIT (local_names
, 8, "local_names");
972 name
= DECL_NAME (decl
);
974 nelts
= VARRAY_ACTIVE_SIZE (local_names
);
975 for (i
= 0; i
< nelts
; i
++)
977 t
= VARRAY_TREE (local_names
, i
);
978 if (DECL_NAME (t
) == name
)
980 if (!DECL_LANG_SPECIFIC (decl
))
981 retrofit_lang_decl (decl
);
982 DECL_LANG_SPECIFIC (decl
)->decl_flags
.u2sel
= 1;
983 if (DECL_LANG_SPECIFIC (t
))
984 DECL_DISCRIMINATOR (decl
) = DECL_DISCRIMINATOR (t
) + 1;
986 DECL_DISCRIMINATOR (decl
) = 1;
988 VARRAY_TREE (local_names
, i
) = decl
;
989 timevar_pop (TV_NAME_LOOKUP
);
994 VARRAY_PUSH_TREE (local_names
, decl
);
995 timevar_pop (TV_NAME_LOOKUP
);
998 /* Subroutine of duplicate_decls: return truthvalue of whether
999 or not types of these decls match.
1001 For C++, we must compare the parameter list so that `int' can match
1002 `int&' in a parameter position, but `int&' is not confused with
1006 decls_match (tree newdecl
, tree olddecl
)
1010 if (newdecl
== olddecl
)
1013 if (TREE_CODE (newdecl
) != TREE_CODE (olddecl
))
1014 /* If the two DECLs are not even the same kind of thing, we're not
1015 interested in their types. */
1018 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1020 tree f1
= TREE_TYPE (newdecl
);
1021 tree f2
= TREE_TYPE (olddecl
);
1022 tree p1
= TYPE_ARG_TYPES (f1
);
1023 tree p2
= TYPE_ARG_TYPES (f2
);
1025 if (CP_DECL_CONTEXT (newdecl
) != CP_DECL_CONTEXT (olddecl
)
1026 && ! (DECL_EXTERN_C_P (newdecl
)
1027 && DECL_EXTERN_C_P (olddecl
)))
1030 if (TREE_CODE (f1
) != TREE_CODE (f2
))
1033 if (same_type_p (TREE_TYPE (f1
), TREE_TYPE (f2
)))
1035 if (p2
== NULL_TREE
&& DECL_EXTERN_C_P (olddecl
)
1036 && (DECL_BUILT_IN (olddecl
)
1037 #ifndef NO_IMPLICIT_EXTERN_C
1038 || (DECL_IN_SYSTEM_HEADER (newdecl
) && !DECL_CLASS_SCOPE_P (newdecl
))
1039 || (DECL_IN_SYSTEM_HEADER (olddecl
) && !DECL_CLASS_SCOPE_P (olddecl
))
1043 types_match
= self_promoting_args_p (p1
);
1044 if (p1
== void_list_node
)
1045 TREE_TYPE (newdecl
) = TREE_TYPE (olddecl
);
1047 #ifndef NO_IMPLICIT_EXTERN_C
1048 else if (p1
== NULL_TREE
1049 && (DECL_EXTERN_C_P (olddecl
)
1050 && DECL_IN_SYSTEM_HEADER (olddecl
)
1051 && !DECL_CLASS_SCOPE_P (olddecl
))
1052 && (DECL_EXTERN_C_P (newdecl
)
1053 && DECL_IN_SYSTEM_HEADER (newdecl
)
1054 && !DECL_CLASS_SCOPE_P (newdecl
)))
1056 types_match
= self_promoting_args_p (p2
);
1057 TREE_TYPE (newdecl
) = TREE_TYPE (olddecl
);
1061 types_match
= compparms (p1
, p2
);
1066 else if (TREE_CODE (newdecl
) == TEMPLATE_DECL
)
1068 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
))
1069 != TREE_CODE (DECL_TEMPLATE_RESULT (olddecl
)))
1072 if (!comp_template_parms (DECL_TEMPLATE_PARMS (newdecl
),
1073 DECL_TEMPLATE_PARMS (olddecl
)))
1076 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) == TYPE_DECL
)
1077 types_match
= same_type_p (TREE_TYPE (DECL_TEMPLATE_RESULT (olddecl
)),
1078 TREE_TYPE (DECL_TEMPLATE_RESULT (newdecl
)));
1080 types_match
= decls_match (DECL_TEMPLATE_RESULT (olddecl
),
1081 DECL_TEMPLATE_RESULT (newdecl
));
1085 if (TREE_TYPE (newdecl
) == error_mark_node
)
1086 types_match
= TREE_TYPE (olddecl
) == error_mark_node
;
1087 else if (TREE_TYPE (olddecl
) == NULL_TREE
)
1088 types_match
= TREE_TYPE (newdecl
) == NULL_TREE
;
1089 else if (TREE_TYPE (newdecl
) == NULL_TREE
)
1092 types_match
= comptypes (TREE_TYPE (newdecl
),
1093 TREE_TYPE (olddecl
),
1094 COMPARE_REDECLARATION
);
1100 /* If NEWDECL is `static' and an `extern' was seen previously,
1101 warn about it. OLDDECL is the previous declaration.
1103 Note that this does not apply to the C++ case of declaring
1104 a variable `extern const' and then later `const'.
1106 Don't complain about built-in functions, since they are beyond
1107 the user's control. */
1110 warn_extern_redeclared_static (tree newdecl
, tree olddecl
)
1114 if (TREE_CODE (newdecl
) == TYPE_DECL
1115 || TREE_CODE (newdecl
) == TEMPLATE_DECL
1116 || TREE_CODE (newdecl
) == CONST_DECL
1117 || TREE_CODE (newdecl
) == NAMESPACE_DECL
)
1120 /* Don't get confused by static member functions; that's a different
1122 if (TREE_CODE (newdecl
) == FUNCTION_DECL
1123 && DECL_STATIC_FUNCTION_P (newdecl
))
1126 /* If the old declaration was `static', or the new one isn't, then
1127 then everything is OK. */
1128 if (DECL_THIS_STATIC (olddecl
) || !DECL_THIS_STATIC (newdecl
))
1131 /* It's OK to declare a builtin function as `static'. */
1132 if (TREE_CODE (olddecl
) == FUNCTION_DECL
1133 && DECL_ARTIFICIAL (olddecl
))
1136 name
= DECL_ASSEMBLER_NAME (newdecl
);
1137 pedwarn ("%qD was declared %<extern%> and later %<static%>", newdecl
);
1138 cp_pedwarn_at ("previous declaration of %qD", olddecl
);
1141 /* If NEWDECL is a redeclaration of OLDDECL, merge the declarations.
1142 If the redeclaration is invalid, a diagnostic is issued, and the
1143 error_mark_node is returned. Otherwise, OLDDECL is returned.
1145 If NEWDECL is not a redeclaration of OLDDECL, NULL_TREE is
1149 duplicate_decls (tree newdecl
, tree olddecl
)
1151 unsigned olddecl_uid
= DECL_UID (olddecl
);
1152 int olddecl_friend
= 0, types_match
= 0;
1153 int new_defines_function
= 0;
1155 if (newdecl
== olddecl
)
1158 types_match
= decls_match (newdecl
, olddecl
);
1160 /* If either the type of the new decl or the type of the old decl is an
1161 error_mark_node, then that implies that we have already issued an
1162 error (earlier) for some bogus type specification, and in that case,
1163 it is rather pointless to harass the user with yet more error message
1164 about the same declaration, so just pretend the types match here. */
1165 if (TREE_TYPE (newdecl
) == error_mark_node
1166 || TREE_TYPE (olddecl
) == error_mark_node
)
1169 if (DECL_P (olddecl
)
1170 && TREE_CODE (newdecl
) == FUNCTION_DECL
1171 && TREE_CODE (olddecl
) == FUNCTION_DECL
1172 && (DECL_UNINLINABLE (newdecl
) || DECL_UNINLINABLE (olddecl
)))
1174 if (DECL_DECLARED_INLINE_P (newdecl
)
1175 && DECL_UNINLINABLE (newdecl
)
1176 && lookup_attribute ("noinline", DECL_ATTRIBUTES (newdecl
)))
1177 /* Already warned elsewhere. */;
1178 else if (DECL_DECLARED_INLINE_P (olddecl
)
1179 && DECL_UNINLINABLE (olddecl
)
1180 && lookup_attribute ("noinline", DECL_ATTRIBUTES (olddecl
)))
1181 /* Already warned. */;
1182 else if (DECL_DECLARED_INLINE_P (newdecl
)
1183 && DECL_UNINLINABLE (olddecl
)
1184 && lookup_attribute ("noinline", DECL_ATTRIBUTES (olddecl
)))
1186 warning ("%Jfunction %qD redeclared as inline", newdecl
, newdecl
);
1187 warning ("%Jprevious declaration of %qD with attribute noinline",
1190 else if (DECL_DECLARED_INLINE_P (olddecl
)
1191 && DECL_UNINLINABLE (newdecl
)
1192 && lookup_attribute ("noinline", DECL_ATTRIBUTES (newdecl
)))
1194 warning ("%Jfunction %qD redeclared with attribute noinline",
1196 warning ("%Jprevious declaration of %qD was inline",
1201 /* Check for redeclaration and other discrepancies. */
1202 if (TREE_CODE (olddecl
) == FUNCTION_DECL
1203 && DECL_ARTIFICIAL (olddecl
))
1205 if (TREE_CODE (newdecl
) != FUNCTION_DECL
)
1207 /* Avoid warnings redeclaring anticipated built-ins. */
1208 if (DECL_ANTICIPATED (olddecl
))
1211 /* If you declare a built-in or predefined function name as static,
1212 the old definition is overridden, but optionally warn this was a
1213 bad choice of name. */
1214 if (! TREE_PUBLIC (newdecl
))
1217 warning ("shadowing %s function %q#D",
1218 DECL_BUILT_IN (olddecl
) ? "built-in" : "library",
1220 /* Discard the old built-in function. */
1223 /* If the built-in is not ansi, then programs can override
1224 it even globally without an error. */
1225 else if (! DECL_BUILT_IN (olddecl
))
1226 warning ("library function %q#D redeclared as non-function %q#D",
1230 error ("declaration of %q#D", newdecl
);
1231 error ("conflicts with built-in declaration %q#D",
1236 else if (!types_match
)
1238 /* Avoid warnings redeclaring anticipated built-ins. */
1239 if (DECL_ANTICIPATED (olddecl
))
1241 /* Deal with fileptr_type_node. FILE type is not known
1242 at the time we create the builtins. */
1245 for (t1
= TYPE_ARG_TYPES (TREE_TYPE (newdecl
)),
1246 t2
= TYPE_ARG_TYPES (TREE_TYPE (olddecl
));
1248 t1
= TREE_CHAIN (t1
), t2
= TREE_CHAIN (t2
))
1251 else if (TREE_VALUE (t2
) == fileptr_type_node
)
1253 tree t
= TREE_VALUE (t1
);
1255 if (TREE_CODE (t
) == POINTER_TYPE
1256 && TYPE_NAME (TREE_TYPE (t
))
1257 && DECL_NAME (TYPE_NAME (TREE_TYPE (t
)))
1258 == get_identifier ("FILE")
1259 && compparms (TREE_CHAIN (t1
), TREE_CHAIN (t2
)))
1261 tree oldargs
= TYPE_ARG_TYPES (TREE_TYPE (olddecl
));
1263 TYPE_ARG_TYPES (TREE_TYPE (olddecl
))
1264 = TYPE_ARG_TYPES (TREE_TYPE (newdecl
));
1265 types_match
= decls_match (newdecl
, olddecl
);
1267 return duplicate_decls (newdecl
, olddecl
);
1268 TYPE_ARG_TYPES (TREE_TYPE (olddecl
)) = oldargs
;
1271 else if (! same_type_p (TREE_VALUE (t1
), TREE_VALUE (t2
)))
1274 else if ((DECL_EXTERN_C_P (newdecl
)
1275 && DECL_EXTERN_C_P (olddecl
))
1276 || compparms (TYPE_ARG_TYPES (TREE_TYPE (newdecl
)),
1277 TYPE_ARG_TYPES (TREE_TYPE (olddecl
))))
1279 /* A near match; override the builtin. */
1281 if (TREE_PUBLIC (newdecl
))
1283 warning ("new declaration %q#D", newdecl
);
1284 warning ("ambiguates built-in declaration %q#D",
1287 else if (warn_shadow
)
1288 warning ("shadowing %s function %q#D",
1289 DECL_BUILT_IN (olddecl
) ? "built-in" : "library",
1293 /* Discard the old built-in function. */
1296 /* Replace the old RTL to avoid problems with inlining. */
1297 COPY_DECL_RTL (newdecl
, olddecl
);
1299 /* Even if the types match, prefer the new declarations type
1300 for anticipated built-ins, for exception lists, etc... */
1301 else if (DECL_ANTICIPATED (olddecl
))
1303 tree type
= TREE_TYPE (newdecl
);
1304 tree attribs
= (*targetm
.merge_type_attributes
)
1305 (TREE_TYPE (olddecl
), type
);
1307 type
= cp_build_type_attribute_variant (type
, attribs
);
1308 TREE_TYPE (newdecl
) = TREE_TYPE (olddecl
) = type
;
1311 /* Whether or not the builtin can throw exceptions has no
1312 bearing on this declarator. */
1313 TREE_NOTHROW (olddecl
) = 0;
1315 if (DECL_THIS_STATIC (newdecl
) && !DECL_THIS_STATIC (olddecl
))
1317 /* If a builtin function is redeclared as `static', merge
1318 the declarations, but make the original one static. */
1319 DECL_THIS_STATIC (olddecl
) = 1;
1320 TREE_PUBLIC (olddecl
) = 0;
1322 /* Make the old declaration consistent with the new one so
1323 that all remnants of the builtin-ness of this function
1324 will be banished. */
1325 SET_DECL_LANGUAGE (olddecl
, DECL_LANGUAGE (newdecl
));
1326 COPY_DECL_RTL (newdecl
, olddecl
);
1329 else if (TREE_CODE (olddecl
) != TREE_CODE (newdecl
))
1331 if ((TREE_CODE (olddecl
) == TYPE_DECL
&& DECL_ARTIFICIAL (olddecl
)
1332 && TREE_CODE (newdecl
) != TYPE_DECL
1333 && ! (TREE_CODE (newdecl
) == TEMPLATE_DECL
1334 && TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) == TYPE_DECL
))
1335 || (TREE_CODE (newdecl
) == TYPE_DECL
&& DECL_ARTIFICIAL (newdecl
)
1336 && TREE_CODE (olddecl
) != TYPE_DECL
1337 && ! (TREE_CODE (olddecl
) == TEMPLATE_DECL
1338 && (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl
))
1341 /* We do nothing special here, because C++ does such nasty
1342 things with TYPE_DECLs. Instead, just let the TYPE_DECL
1343 get shadowed, and know that if we need to find a TYPE_DECL
1344 for a given name, we can look in the IDENTIFIER_TYPE_VALUE
1345 slot of the identifier. */
1349 if ((TREE_CODE (newdecl
) == FUNCTION_DECL
1350 && DECL_FUNCTION_TEMPLATE_P (olddecl
))
1351 || (TREE_CODE (olddecl
) == FUNCTION_DECL
1352 && DECL_FUNCTION_TEMPLATE_P (newdecl
)))
1355 error ("%q#D redeclared as different kind of symbol", newdecl
);
1356 if (TREE_CODE (olddecl
) == TREE_LIST
)
1357 olddecl
= TREE_VALUE (olddecl
);
1358 cp_error_at ("previous declaration of %q#D", olddecl
);
1360 return error_mark_node
;
1362 else if (!types_match
)
1364 if (CP_DECL_CONTEXT (newdecl
) != CP_DECL_CONTEXT (olddecl
))
1365 /* These are certainly not duplicate declarations; they're
1366 from different scopes. */
1369 if (TREE_CODE (newdecl
) == TEMPLATE_DECL
)
1371 /* The name of a class template may not be declared to refer to
1372 any other template, class, function, object, namespace, value,
1373 or type in the same scope. */
1374 if (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl
)) == TYPE_DECL
1375 || TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) == TYPE_DECL
)
1377 error ("declaration of template %q#D", newdecl
);
1378 cp_error_at ("conflicts with previous declaration %q#D",
1381 else if (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl
)) == FUNCTION_DECL
1382 && TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) == FUNCTION_DECL
1383 && compparms (TYPE_ARG_TYPES (TREE_TYPE (DECL_TEMPLATE_RESULT (olddecl
))),
1384 TYPE_ARG_TYPES (TREE_TYPE (DECL_TEMPLATE_RESULT (newdecl
))))
1385 && comp_template_parms (DECL_TEMPLATE_PARMS (newdecl
),
1386 DECL_TEMPLATE_PARMS (olddecl
))
1387 /* Template functions can be disambiguated by
1389 && same_type_p (TREE_TYPE (TREE_TYPE (newdecl
)),
1390 TREE_TYPE (TREE_TYPE (olddecl
))))
1392 error ("new declaration %q#D", newdecl
);
1393 cp_error_at ("ambiguates old declaration %q#D", olddecl
);
1397 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1399 if (DECL_EXTERN_C_P (newdecl
) && DECL_EXTERN_C_P (olddecl
))
1401 error ("declaration of C function %q#D conflicts with",
1403 cp_error_at ("previous declaration %q#D here", olddecl
);
1405 else if (compparms (TYPE_ARG_TYPES (TREE_TYPE (newdecl
)),
1406 TYPE_ARG_TYPES (TREE_TYPE (olddecl
))))
1408 error ("new declaration %q#D", newdecl
);
1409 cp_error_at ("ambiguates old declaration %q#D", olddecl
);
1416 error ("conflicting declaration %q#D", newdecl
);
1417 cp_error_at ("%qD has a previous declaration as %q#D",
1419 return error_mark_node
;
1422 else if (TREE_CODE (newdecl
) == FUNCTION_DECL
1423 && ((DECL_TEMPLATE_SPECIALIZATION (olddecl
)
1424 && (!DECL_TEMPLATE_INFO (newdecl
)
1425 || (DECL_TI_TEMPLATE (newdecl
)
1426 != DECL_TI_TEMPLATE (olddecl
))))
1427 || (DECL_TEMPLATE_SPECIALIZATION (newdecl
)
1428 && (!DECL_TEMPLATE_INFO (olddecl
)
1429 || (DECL_TI_TEMPLATE (olddecl
)
1430 != DECL_TI_TEMPLATE (newdecl
))))))
1431 /* It's OK to have a template specialization and a non-template
1432 with the same type, or to have specializations of two
1433 different templates with the same type. Note that if one is a
1434 specialization, and the other is an instantiation of the same
1435 template, that we do not exit at this point. That situation
1436 can occur if we instantiate a template class, and then
1437 specialize one of its methods. This situation is valid, but
1438 the declarations must be merged in the usual way. */
1440 else if (TREE_CODE (newdecl
) == FUNCTION_DECL
1441 && ((DECL_TEMPLATE_INSTANTIATION (olddecl
)
1442 && !DECL_USE_TEMPLATE (newdecl
))
1443 || (DECL_TEMPLATE_INSTANTIATION (newdecl
)
1444 && !DECL_USE_TEMPLATE (olddecl
))))
1445 /* One of the declarations is a template instantiation, and the
1446 other is not a template at all. That's OK. */
1448 else if (TREE_CODE (newdecl
) == NAMESPACE_DECL
)
1450 /* In [namespace.alias] we have:
1452 In a declarative region, a namespace-alias-definition can be
1453 used to redefine a namespace-alias declared in that declarative
1454 region to refer only to the namespace to which it already
1457 Therefore, if we encounter a second alias directive for the same
1458 alias, we can just ignore the second directive. */
1459 if (DECL_NAMESPACE_ALIAS (newdecl
)
1460 && (DECL_NAMESPACE_ALIAS (newdecl
)
1461 == DECL_NAMESPACE_ALIAS (olddecl
)))
1463 /* [namespace.alias]
1465 A namespace-name or namespace-alias shall not be declared as
1466 the name of any other entity in the same declarative region.
1467 A namespace-name defined at global scope shall not be
1468 declared as the name of any other entity in any global scope
1470 error ("declaration of namespace %qD conflicts with", newdecl
);
1471 cp_error_at ("previous declaration of namespace %qD here", olddecl
);
1472 return error_mark_node
;
1476 const char *errmsg
= redeclaration_error_message (newdecl
, olddecl
);
1479 error (errmsg
, newdecl
);
1480 if (DECL_NAME (olddecl
) != NULL_TREE
)
1481 cp_error_at ((DECL_INITIAL (olddecl
)
1482 && namespace_bindings_p ())
1483 ? "%q#D previously defined here"
1484 : "%q#D previously declared here", olddecl
);
1485 return error_mark_node
;
1487 else if (TREE_CODE (olddecl
) == FUNCTION_DECL
1488 && DECL_INITIAL (olddecl
) != NULL_TREE
1489 && TYPE_ARG_TYPES (TREE_TYPE (olddecl
)) == NULL_TREE
1490 && TYPE_ARG_TYPES (TREE_TYPE (newdecl
)) != NULL_TREE
)
1492 /* Prototype decl follows defn w/o prototype. */
1493 cp_warning_at ("prototype for %q#D", newdecl
);
1494 warning ("%Jfollows non-prototype definition here", olddecl
);
1496 else if (TREE_CODE (olddecl
) == FUNCTION_DECL
1497 && DECL_LANGUAGE (newdecl
) != DECL_LANGUAGE (olddecl
))
1499 /* extern "C" int foo ();
1500 int foo () { bar (); }
1502 if (current_lang_depth () == 0)
1503 SET_DECL_LANGUAGE (newdecl
, DECL_LANGUAGE (olddecl
));
1506 cp_error_at ("previous declaration of %q#D with %qL linkage",
1507 olddecl
, DECL_LANGUAGE (olddecl
));
1508 error ("conflicts with new declaration with %qL linkage",
1509 DECL_LANGUAGE (newdecl
));
1513 if (DECL_LANG_SPECIFIC (olddecl
) && DECL_USE_TEMPLATE (olddecl
))
1515 else if (TREE_CODE (olddecl
) == FUNCTION_DECL
)
1517 tree t1
= TYPE_ARG_TYPES (TREE_TYPE (olddecl
));
1518 tree t2
= TYPE_ARG_TYPES (TREE_TYPE (newdecl
));
1521 if (TREE_CODE (TREE_TYPE (newdecl
)) == METHOD_TYPE
)
1522 t1
= TREE_CHAIN (t1
), t2
= TREE_CHAIN (t2
);
1524 for (; t1
&& t1
!= void_list_node
;
1525 t1
= TREE_CHAIN (t1
), t2
= TREE_CHAIN (t2
), i
++)
1526 if (TREE_PURPOSE (t1
) && TREE_PURPOSE (t2
))
1528 if (1 == simple_cst_equal (TREE_PURPOSE (t1
),
1531 pedwarn ("default argument given for parameter %d of %q#D",
1533 cp_pedwarn_at ("after previous specification in %q#D",
1538 error ("default argument given for parameter %d of %q#D",
1540 cp_error_at ("after previous specification in %q#D",
1545 if (DECL_DECLARED_INLINE_P (newdecl
)
1546 && ! DECL_DECLARED_INLINE_P (olddecl
)
1547 && TREE_ADDRESSABLE (olddecl
) && warn_inline
)
1549 warning ("%q#D was used before it was declared inline", newdecl
);
1550 warning ("%Jprevious non-inline declaration here", olddecl
);
1555 /* Do not merge an implicit typedef with an explicit one. In:
1559 typedef class A A __attribute__ ((foo));
1561 the attribute should apply only to the typedef. */
1562 if (TREE_CODE (olddecl
) == TYPE_DECL
1563 && (DECL_IMPLICIT_TYPEDEF_P (olddecl
)
1564 || DECL_IMPLICIT_TYPEDEF_P (newdecl
)))
1567 /* If new decl is `static' and an `extern' was seen previously,
1569 warn_extern_redeclared_static (newdecl
, olddecl
);
1571 /* We have committed to returning 1 at this point. */
1572 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1574 /* Now that functions must hold information normally held
1575 by field decls, there is extra work to do so that
1576 declaration information does not get destroyed during
1578 if (DECL_VINDEX (olddecl
))
1579 DECL_VINDEX (newdecl
) = DECL_VINDEX (olddecl
);
1580 if (DECL_CONTEXT (olddecl
))
1581 DECL_CONTEXT (newdecl
) = DECL_CONTEXT (olddecl
);
1582 DECL_STATIC_CONSTRUCTOR (newdecl
) |= DECL_STATIC_CONSTRUCTOR (olddecl
);
1583 DECL_STATIC_DESTRUCTOR (newdecl
) |= DECL_STATIC_DESTRUCTOR (olddecl
);
1584 DECL_PURE_VIRTUAL_P (newdecl
) |= DECL_PURE_VIRTUAL_P (olddecl
);
1585 DECL_VIRTUAL_P (newdecl
) |= DECL_VIRTUAL_P (olddecl
);
1586 DECL_THIS_STATIC (newdecl
) |= DECL_THIS_STATIC (olddecl
);
1587 if (DECL_OVERLOADED_OPERATOR_P (olddecl
) != ERROR_MARK
)
1588 SET_OVERLOADED_OPERATOR_CODE
1589 (newdecl
, DECL_OVERLOADED_OPERATOR_P (olddecl
));
1590 new_defines_function
= DECL_INITIAL (newdecl
) != NULL_TREE
;
1592 /* Optionally warn about more than one declaration for the same
1593 name, but don't warn about a function declaration followed by a
1595 if (warn_redundant_decls
&& ! DECL_ARTIFICIAL (olddecl
)
1596 && !(new_defines_function
&& DECL_INITIAL (olddecl
) == NULL_TREE
)
1597 /* Don't warn about extern decl followed by definition. */
1598 && !(DECL_EXTERNAL (olddecl
) && ! DECL_EXTERNAL (newdecl
))
1599 /* Don't warn about friends, let add_friend take care of it. */
1600 && ! (DECL_FRIEND_P (newdecl
) || DECL_FRIEND_P (olddecl
)))
1602 warning ("redundant redeclaration of %qD in same scope", newdecl
);
1603 cp_warning_at ("previous declaration of %qD", olddecl
);
1607 /* Deal with C++: must preserve virtual function table size. */
1608 if (TREE_CODE (olddecl
) == TYPE_DECL
)
1610 tree newtype
= TREE_TYPE (newdecl
);
1611 tree oldtype
= TREE_TYPE (olddecl
);
1613 if (newtype
!= error_mark_node
&& oldtype
!= error_mark_node
1614 && TYPE_LANG_SPECIFIC (newtype
) && TYPE_LANG_SPECIFIC (oldtype
))
1615 CLASSTYPE_FRIEND_CLASSES (newtype
)
1616 = CLASSTYPE_FRIEND_CLASSES (oldtype
);
1618 DECL_ORIGINAL_TYPE (newdecl
) = DECL_ORIGINAL_TYPE (olddecl
);
1621 /* Copy all the DECL_... slots specified in the new decl
1622 except for any that we copy here from the old type. */
1623 DECL_ATTRIBUTES (newdecl
)
1624 = (*targetm
.merge_decl_attributes
) (olddecl
, newdecl
);
1626 if (TREE_CODE (newdecl
) == TEMPLATE_DECL
)
1628 TREE_TYPE (olddecl
) = TREE_TYPE (DECL_TEMPLATE_RESULT (olddecl
));
1629 DECL_TEMPLATE_SPECIALIZATIONS (olddecl
)
1630 = chainon (DECL_TEMPLATE_SPECIALIZATIONS (olddecl
),
1631 DECL_TEMPLATE_SPECIALIZATIONS (newdecl
));
1633 /* If the new declaration is a definition, update the file and
1634 line information on the declaration. */
1635 if (DECL_INITIAL (DECL_TEMPLATE_RESULT (olddecl
)) == NULL_TREE
1636 && DECL_INITIAL (DECL_TEMPLATE_RESULT (newdecl
)) != NULL_TREE
)
1638 DECL_SOURCE_LOCATION (olddecl
)
1639 = DECL_SOURCE_LOCATION (DECL_TEMPLATE_RESULT (olddecl
))
1640 = DECL_SOURCE_LOCATION (newdecl
);
1641 if (DECL_FUNCTION_TEMPLATE_P (newdecl
))
1642 DECL_ARGUMENTS (DECL_TEMPLATE_RESULT (olddecl
))
1643 = DECL_ARGUMENTS (DECL_TEMPLATE_RESULT (newdecl
));
1646 if (DECL_FUNCTION_TEMPLATE_P (newdecl
))
1648 DECL_INLINE (DECL_TEMPLATE_RESULT (olddecl
))
1649 |= DECL_INLINE (DECL_TEMPLATE_RESULT (newdecl
));
1650 DECL_DECLARED_INLINE_P (DECL_TEMPLATE_RESULT (olddecl
))
1651 |= DECL_DECLARED_INLINE_P (DECL_TEMPLATE_RESULT (newdecl
));
1659 /* Automatically handles default parameters. */
1660 tree oldtype
= TREE_TYPE (olddecl
);
1663 /* Merge the data types specified in the two decls. */
1664 newtype
= merge_types (TREE_TYPE (newdecl
), TREE_TYPE (olddecl
));
1666 /* If merge_types produces a non-typedef type, just use the old type. */
1667 if (TREE_CODE (newdecl
) == TYPE_DECL
1668 && newtype
== DECL_ORIGINAL_TYPE (newdecl
))
1671 if (TREE_CODE (newdecl
) == VAR_DECL
)
1673 DECL_THIS_EXTERN (newdecl
) |= DECL_THIS_EXTERN (olddecl
);
1674 DECL_INITIALIZED_P (newdecl
) |= DECL_INITIALIZED_P (olddecl
);
1675 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (newdecl
)
1676 |= DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (olddecl
);
1679 /* Do this after calling `merge_types' so that default
1680 parameters don't confuse us. */
1681 else if (TREE_CODE (newdecl
) == FUNCTION_DECL
1682 && (TYPE_RAISES_EXCEPTIONS (TREE_TYPE (newdecl
))
1683 != TYPE_RAISES_EXCEPTIONS (TREE_TYPE (olddecl
))))
1685 TREE_TYPE (newdecl
) = build_exception_variant (newtype
,
1686 TYPE_RAISES_EXCEPTIONS (TREE_TYPE (newdecl
)));
1687 TREE_TYPE (olddecl
) = build_exception_variant (newtype
,
1688 TYPE_RAISES_EXCEPTIONS (oldtype
));
1690 if ((pedantic
|| ! DECL_IN_SYSTEM_HEADER (olddecl
))
1691 && ! DECL_IS_BUILTIN (olddecl
)
1693 && !comp_except_specs (TYPE_RAISES_EXCEPTIONS (TREE_TYPE (newdecl
)),
1694 TYPE_RAISES_EXCEPTIONS (TREE_TYPE (olddecl
)), 1))
1696 error ("declaration of %qF throws different exceptions",
1698 cp_error_at ("than previous declaration %qF", olddecl
);
1701 TREE_TYPE (newdecl
) = TREE_TYPE (olddecl
) = newtype
;
1703 /* Lay the type out, unless already done. */
1704 if (! same_type_p (newtype
, oldtype
)
1705 && TREE_TYPE (newdecl
) != error_mark_node
1706 && !(processing_template_decl
&& uses_template_parms (newdecl
)))
1707 layout_type (TREE_TYPE (newdecl
));
1709 if ((TREE_CODE (newdecl
) == VAR_DECL
1710 || TREE_CODE (newdecl
) == PARM_DECL
1711 || TREE_CODE (newdecl
) == RESULT_DECL
1712 || TREE_CODE (newdecl
) == FIELD_DECL
1713 || TREE_CODE (newdecl
) == TYPE_DECL
)
1714 && !(processing_template_decl
&& uses_template_parms (newdecl
)))
1715 layout_decl (newdecl
, 0);
1717 /* Merge the type qualifiers. */
1718 if (TREE_READONLY (newdecl
))
1719 TREE_READONLY (olddecl
) = 1;
1720 if (TREE_THIS_VOLATILE (newdecl
))
1721 TREE_THIS_VOLATILE (olddecl
) = 1;
1722 if (TREE_NOTHROW (newdecl
))
1723 TREE_NOTHROW (olddecl
) = 1;
1725 /* Merge deprecatedness. */
1726 if (TREE_DEPRECATED (newdecl
))
1727 TREE_DEPRECATED (olddecl
) = 1;
1729 /* Merge the initialization information. */
1730 if (DECL_INITIAL (newdecl
) == NULL_TREE
1731 && DECL_INITIAL (olddecl
) != NULL_TREE
)
1733 DECL_INITIAL (newdecl
) = DECL_INITIAL (olddecl
);
1734 DECL_SOURCE_LOCATION (newdecl
) = DECL_SOURCE_LOCATION (olddecl
);
1735 if (CAN_HAVE_FULL_LANG_DECL_P (newdecl
)
1736 && DECL_LANG_SPECIFIC (newdecl
)
1737 && DECL_LANG_SPECIFIC (olddecl
))
1739 DECL_SAVED_TREE (newdecl
) = DECL_SAVED_TREE (olddecl
);
1740 DECL_STRUCT_FUNCTION (newdecl
) = DECL_STRUCT_FUNCTION (olddecl
);
1744 /* Merge the section attribute.
1745 We want to issue an error if the sections conflict but that must be
1746 done later in decl_attributes since we are called before attributes
1748 if (DECL_SECTION_NAME (newdecl
) == NULL_TREE
)
1749 DECL_SECTION_NAME (newdecl
) = DECL_SECTION_NAME (olddecl
);
1751 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1753 DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (newdecl
)
1754 |= DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (olddecl
);
1755 DECL_NO_LIMIT_STACK (newdecl
) |= DECL_NO_LIMIT_STACK (olddecl
);
1756 TREE_THIS_VOLATILE (newdecl
) |= TREE_THIS_VOLATILE (olddecl
);
1757 TREE_READONLY (newdecl
) |= TREE_READONLY (olddecl
);
1758 TREE_NOTHROW (newdecl
) |= TREE_NOTHROW (olddecl
);
1759 DECL_IS_MALLOC (newdecl
) |= DECL_IS_MALLOC (olddecl
);
1760 DECL_IS_PURE (newdecl
) |= DECL_IS_PURE (olddecl
);
1761 /* Keep the old RTL. */
1762 COPY_DECL_RTL (olddecl
, newdecl
);
1764 else if (TREE_CODE (newdecl
) == VAR_DECL
1765 && (DECL_SIZE (olddecl
) || !DECL_SIZE (newdecl
)))
1767 /* Keep the old RTL. We cannot keep the old RTL if the old
1768 declaration was for an incomplete object and the new
1769 declaration is not since many attributes of the RTL will
1771 COPY_DECL_RTL (olddecl
, newdecl
);
1774 /* If cannot merge, then use the new type and qualifiers,
1775 and don't preserve the old rtl. */
1778 /* Clean out any memory we had of the old declaration. */
1779 tree oldstatic
= value_member (olddecl
, static_aggregates
);
1781 TREE_VALUE (oldstatic
) = error_mark_node
;
1783 TREE_TYPE (olddecl
) = TREE_TYPE (newdecl
);
1784 TREE_READONLY (olddecl
) = TREE_READONLY (newdecl
);
1785 TREE_THIS_VOLATILE (olddecl
) = TREE_THIS_VOLATILE (newdecl
);
1786 TREE_SIDE_EFFECTS (olddecl
) = TREE_SIDE_EFFECTS (newdecl
);
1789 /* Merge the storage class information. */
1790 merge_weak (newdecl
, olddecl
);
1792 DECL_ONE_ONLY (newdecl
) |= DECL_ONE_ONLY (olddecl
);
1793 DECL_DEFER_OUTPUT (newdecl
) |= DECL_DEFER_OUTPUT (olddecl
);
1794 TREE_PUBLIC (newdecl
) = TREE_PUBLIC (olddecl
);
1795 TREE_STATIC (olddecl
) = TREE_STATIC (newdecl
) |= TREE_STATIC (olddecl
);
1796 if (! DECL_EXTERNAL (olddecl
))
1797 DECL_EXTERNAL (newdecl
) = 0;
1799 if (DECL_LANG_SPECIFIC (newdecl
) && DECL_LANG_SPECIFIC (olddecl
))
1801 DECL_INTERFACE_KNOWN (newdecl
) |= DECL_INTERFACE_KNOWN (olddecl
);
1802 DECL_NOT_REALLY_EXTERN (newdecl
) |= DECL_NOT_REALLY_EXTERN (olddecl
);
1803 DECL_COMDAT (newdecl
) |= DECL_COMDAT (olddecl
);
1804 DECL_TEMPLATE_INSTANTIATED (newdecl
)
1805 |= DECL_TEMPLATE_INSTANTIATED (olddecl
);
1806 /* Don't really know how much of the language-specific
1807 values we should copy from old to new. */
1808 DECL_IN_AGGR_P (newdecl
) = DECL_IN_AGGR_P (olddecl
);
1809 DECL_LANG_SPECIFIC (newdecl
)->decl_flags
.u2
=
1810 DECL_LANG_SPECIFIC (olddecl
)->decl_flags
.u2
;
1811 DECL_NONCONVERTING_P (newdecl
) = DECL_NONCONVERTING_P (olddecl
);
1812 DECL_REPO_AVAILABLE_P (newdecl
) = DECL_REPO_AVAILABLE_P (olddecl
);
1813 DECL_TEMPLATE_INFO (newdecl
) = DECL_TEMPLATE_INFO (olddecl
);
1814 DECL_INITIALIZED_IN_CLASS_P (newdecl
)
1815 |= DECL_INITIALIZED_IN_CLASS_P (olddecl
);
1816 olddecl_friend
= DECL_FRIEND_P (olddecl
);
1818 /* Only functions have DECL_BEFRIENDING_CLASSES. */
1819 if (TREE_CODE (newdecl
) == FUNCTION_DECL
1820 || DECL_FUNCTION_TEMPLATE_P (newdecl
))
1822 DECL_BEFRIENDING_CLASSES (newdecl
)
1823 = chainon (DECL_BEFRIENDING_CLASSES (newdecl
),
1824 DECL_BEFRIENDING_CLASSES (olddecl
));
1825 /* DECL_THUNKS is only valid for virtual functions,
1826 otherwise it is a DECL_FRIEND_CONTEXT. */
1827 if (DECL_VIRTUAL_P (newdecl
))
1828 DECL_THUNKS (newdecl
) = DECL_THUNKS (olddecl
);
1832 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1834 if (DECL_TEMPLATE_INSTANTIATION (olddecl
)
1835 && !DECL_TEMPLATE_INSTANTIATION (newdecl
))
1837 /* If newdecl is not a specialization, then it is not a
1838 template-related function at all. And that means that we
1839 should have exited above, returning 0. */
1840 gcc_assert (DECL_TEMPLATE_SPECIALIZATION (newdecl
));
1842 if (TREE_USED (olddecl
))
1843 /* From [temp.expl.spec]:
1845 If a template, a member template or the member of a class
1846 template is explicitly specialized then that
1847 specialization shall be declared before the first use of
1848 that specialization that would cause an implicit
1849 instantiation to take place, in every translation unit in
1850 which such a use occurs. */
1851 error ("explicit specialization of %qD after first use",
1854 SET_DECL_TEMPLATE_SPECIALIZATION (olddecl
);
1856 /* [temp.expl.spec/14] We don't inline explicit specialization
1857 just because the primary template says so. */
1861 if (DECL_PENDING_INLINE_INFO (newdecl
) == 0)
1862 DECL_PENDING_INLINE_INFO (newdecl
) = DECL_PENDING_INLINE_INFO (olddecl
);
1864 DECL_DECLARED_INLINE_P (newdecl
) |= DECL_DECLARED_INLINE_P (olddecl
);
1866 /* If either decl says `inline', this fn is inline, unless
1867 its definition was passed already. */
1868 if (DECL_INLINE (newdecl
) && DECL_INITIAL (olddecl
) == NULL_TREE
)
1869 DECL_INLINE (olddecl
) = 1;
1870 DECL_INLINE (newdecl
) = DECL_INLINE (olddecl
);
1872 DECL_UNINLINABLE (newdecl
) = DECL_UNINLINABLE (olddecl
)
1873 = (DECL_UNINLINABLE (newdecl
) || DECL_UNINLINABLE (olddecl
));
1876 /* Preserve abstractness on cloned [cd]tors. */
1877 DECL_ABSTRACT (newdecl
) = DECL_ABSTRACT (olddecl
);
1881 SET_DECL_LANGUAGE (olddecl
, DECL_LANGUAGE (newdecl
));
1882 COPY_DECL_ASSEMBLER_NAME (newdecl
, olddecl
);
1883 COPY_DECL_RTL (newdecl
, olddecl
);
1885 if (! types_match
|| new_defines_function
)
1887 /* These need to be copied so that the names are available.
1888 Note that if the types do match, we'll preserve inline
1889 info and other bits, but if not, we won't. */
1890 DECL_ARGUMENTS (olddecl
) = DECL_ARGUMENTS (newdecl
);
1891 DECL_RESULT (olddecl
) = DECL_RESULT (newdecl
);
1893 if (new_defines_function
)
1894 /* If defining a function declared with other language
1895 linkage, use the previously declared language linkage. */
1896 SET_DECL_LANGUAGE (newdecl
, DECL_LANGUAGE (olddecl
));
1897 else if (types_match
)
1899 /* If redeclaring a builtin function, and not a definition,
1900 it stays built in. */
1901 if (DECL_BUILT_IN (olddecl
))
1903 DECL_BUILT_IN_CLASS (newdecl
) = DECL_BUILT_IN_CLASS (olddecl
);
1904 DECL_FUNCTION_CODE (newdecl
) = DECL_FUNCTION_CODE (olddecl
);
1905 /* If we're keeping the built-in definition, keep the rtl,
1906 regardless of declaration matches. */
1907 COPY_DECL_RTL (olddecl
, newdecl
);
1910 DECL_RESULT (newdecl
) = DECL_RESULT (olddecl
);
1911 /* Don't clear out the arguments if we're redefining a function. */
1912 if (DECL_ARGUMENTS (olddecl
))
1913 DECL_ARGUMENTS (newdecl
) = DECL_ARGUMENTS (olddecl
);
1916 else if (TREE_CODE (newdecl
) == NAMESPACE_DECL
)
1917 NAMESPACE_LEVEL (newdecl
) = NAMESPACE_LEVEL (olddecl
);
1919 /* Now preserve various other info from the definition. */
1920 TREE_ADDRESSABLE (newdecl
) = TREE_ADDRESSABLE (olddecl
);
1921 TREE_ASM_WRITTEN (newdecl
) = TREE_ASM_WRITTEN (olddecl
);
1922 DECL_COMMON (newdecl
) = DECL_COMMON (olddecl
);
1923 COPY_DECL_ASSEMBLER_NAME (olddecl
, newdecl
);
1925 /* Warn about conflicting visibility specifications. */
1926 if (DECL_VISIBILITY_SPECIFIED (olddecl
)
1927 && DECL_VISIBILITY_SPECIFIED (newdecl
)
1928 && DECL_VISIBILITY (newdecl
) != DECL_VISIBILITY (olddecl
))
1930 warning ("%J%qD: visibility attribute ignored because it",
1932 warning ("%Jconflicts with previous declaration here", olddecl
);
1934 /* Choose the declaration which specified visibility. */
1935 if (DECL_VISIBILITY_SPECIFIED (olddecl
))
1937 DECL_VISIBILITY (newdecl
) = DECL_VISIBILITY (olddecl
);
1938 DECL_VISIBILITY_SPECIFIED (newdecl
) = 1;
1941 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1945 function_size
= sizeof (struct tree_decl
);
1947 memcpy ((char *) olddecl
+ sizeof (struct tree_common
),
1948 (char *) newdecl
+ sizeof (struct tree_common
),
1949 function_size
- sizeof (struct tree_common
));
1951 if (DECL_TEMPLATE_INSTANTIATION (newdecl
))
1952 /* If newdecl is a template instantiation, it is possible that
1953 the following sequence of events has occurred:
1955 o A friend function was declared in a class template. The
1956 class template was instantiated.
1958 o The instantiation of the friend declaration was
1959 recorded on the instantiation list, and is newdecl.
1961 o Later, however, instantiate_class_template called pushdecl
1962 on the newdecl to perform name injection. But, pushdecl in
1963 turn called duplicate_decls when it discovered that another
1964 declaration of a global function with the same name already
1967 o Here, in duplicate_decls, we decided to clobber newdecl.
1969 If we're going to do that, we'd better make sure that
1970 olddecl, and not newdecl, is on the list of
1971 instantiations so that if we try to do the instantiation
1972 again we won't get the clobbered declaration. */
1973 reregister_specialization (newdecl
,
1974 DECL_TI_TEMPLATE (newdecl
),
1979 memcpy ((char *) olddecl
+ sizeof (struct tree_common
),
1980 (char *) newdecl
+ sizeof (struct tree_common
),
1981 sizeof (struct tree_decl
) - sizeof (struct tree_common
)
1982 + TREE_CODE_LENGTH (TREE_CODE (newdecl
)) * sizeof (char *));
1985 DECL_UID (olddecl
) = olddecl_uid
;
1987 DECL_FRIEND_P (olddecl
) = 1;
1989 /* NEWDECL contains the merged attribute lists.
1990 Update OLDDECL to be the same. */
1991 DECL_ATTRIBUTES (olddecl
) = DECL_ATTRIBUTES (newdecl
);
1993 /* If OLDDECL had its DECL_RTL instantiated, re-invoke make_decl_rtl
1994 so that encode_section_info has a chance to look at the new decl
1995 flags and attributes. */
1996 if (DECL_RTL_SET_P (olddecl
)
1997 && (TREE_CODE (olddecl
) == FUNCTION_DECL
1998 || (TREE_CODE (olddecl
) == VAR_DECL
1999 && TREE_STATIC (olddecl
))))
2000 make_decl_rtl (olddecl
);
2005 /* Return zero if the declaration NEWDECL is valid
2006 when the declaration OLDDECL (assumed to be for the same name)
2007 has already been seen.
2008 Otherwise return an error message format string with a %s
2009 where the identifier should go. */
2012 redeclaration_error_message (tree newdecl
, tree olddecl
)
2014 if (TREE_CODE (newdecl
) == TYPE_DECL
)
2016 /* Because C++ can put things into name space for free,
2017 constructs like "typedef struct foo { ... } foo"
2018 would look like an erroneous redeclaration. */
2019 if (same_type_p (TREE_TYPE (newdecl
), TREE_TYPE (olddecl
)))
2022 return "redefinition of %q#D";
2024 else if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
2026 /* If this is a pure function, its olddecl will actually be
2027 the original initialization to `0' (which we force to call
2028 abort()). Don't complain about redefinition in this case. */
2029 if (DECL_LANG_SPECIFIC (olddecl
) && DECL_PURE_VIRTUAL_P (olddecl
))
2032 /* If both functions come from different namespaces, this is not
2033 a redeclaration - this is a conflict with a used function. */
2034 if (DECL_NAMESPACE_SCOPE_P (olddecl
)
2035 && DECL_CONTEXT (olddecl
) != DECL_CONTEXT (newdecl
))
2036 return "%qD conflicts with used function";
2038 /* We'll complain about linkage mismatches in
2039 warn_extern_redeclared_static. */
2041 /* Defining the same name twice is no good. */
2042 if (DECL_INITIAL (olddecl
) != NULL_TREE
2043 && DECL_INITIAL (newdecl
) != NULL_TREE
)
2045 if (DECL_NAME (olddecl
) == NULL_TREE
)
2046 return "%q#D not declared in class";
2048 return "redefinition of %q#D";
2052 else if (TREE_CODE (newdecl
) == TEMPLATE_DECL
)
2056 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) == TYPE_DECL
)
2058 if (COMPLETE_TYPE_P (TREE_TYPE (newdecl
))
2059 && COMPLETE_TYPE_P (TREE_TYPE (olddecl
)))
2060 return "redefinition of %q#D";
2064 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) != FUNCTION_DECL
2065 || (DECL_TEMPLATE_RESULT (newdecl
)
2066 == DECL_TEMPLATE_RESULT (olddecl
)))
2069 nt
= DECL_TEMPLATE_RESULT (newdecl
);
2070 if (DECL_TEMPLATE_INFO (nt
))
2071 nt
= DECL_TEMPLATE_RESULT (template_for_substitution (nt
));
2072 ot
= DECL_TEMPLATE_RESULT (olddecl
);
2073 if (DECL_TEMPLATE_INFO (ot
))
2074 ot
= DECL_TEMPLATE_RESULT (template_for_substitution (ot
));
2075 if (DECL_INITIAL (nt
) && DECL_INITIAL (ot
))
2076 return "redefinition of %q#D";
2080 else if (toplevel_bindings_p () || DECL_NAMESPACE_SCOPE_P (newdecl
))
2082 /* Objects declared at top level: */
2083 /* If at least one is a reference, it's ok. */
2084 if (DECL_EXTERNAL (newdecl
) || DECL_EXTERNAL (olddecl
))
2086 /* Reject two definitions. */
2087 return "redefinition of %q#D";
2091 /* Objects declared with block scope: */
2092 /* Reject two definitions, and reject a definition
2093 together with an external reference. */
2094 if (!(DECL_EXTERNAL (newdecl
) && DECL_EXTERNAL (olddecl
)))
2095 return "redeclaration of %q#D";
2100 /* Create a new label, named ID. */
2103 make_label_decl (tree id
, int local_p
)
2107 decl
= build_decl (LABEL_DECL
, id
, void_type_node
);
2109 DECL_CONTEXT (decl
) = current_function_decl
;
2110 DECL_MODE (decl
) = VOIDmode
;
2111 C_DECLARED_LABEL_FLAG (decl
) = local_p
;
2113 /* Say where one reference is to the label, for the sake of the
2114 error if it is not defined. */
2115 DECL_SOURCE_LOCATION (decl
) = input_location
;
2117 /* Record the fact that this identifier is bound to this label. */
2118 SET_IDENTIFIER_LABEL_VALUE (id
, decl
);
2123 /* Record this label on the list of used labels so that we can check
2124 at the end of the function to see whether or not the label was
2125 actually defined, and so we can check when the label is defined whether
2126 this use is valid. */
2129 use_label (tree decl
)
2131 if (named_label_uses
== NULL
2132 || named_label_uses
->names_in_scope
!= current_binding_level
->names
2133 || named_label_uses
->label_decl
!= decl
)
2135 struct named_label_use_list
*new_ent
;
2136 new_ent
= GGC_NEW (struct named_label_use_list
);
2137 new_ent
->label_decl
= decl
;
2138 new_ent
->names_in_scope
= current_binding_level
->names
;
2139 new_ent
->binding_level
= current_binding_level
;
2140 new_ent
->o_goto_locus
= input_location
;
2141 new_ent
->next
= named_label_uses
;
2142 named_label_uses
= new_ent
;
2146 /* Look for a label named ID in the current function. If one cannot
2147 be found, create one. (We keep track of used, but undefined,
2148 labels, and complain about them at the end of a function.) */
2151 lookup_label (tree id
)
2154 struct named_label_list
*ent
;
2156 timevar_push (TV_NAME_LOOKUP
);
2157 /* You can't use labels at global scope. */
2158 if (current_function_decl
== NULL_TREE
)
2160 error ("label %qE referenced outside of any function", id
);
2161 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP
, NULL_TREE
);
2164 /* See if we've already got this label. */
2165 decl
= IDENTIFIER_LABEL_VALUE (id
);
2166 if (decl
!= NULL_TREE
&& DECL_CONTEXT (decl
) == current_function_decl
)
2167 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP
, decl
);
2169 /* Record this label on the list of labels used in this function.
2170 We do this before calling make_label_decl so that we get the
2171 IDENTIFIER_LABEL_VALUE before the new label is declared. */
2172 ent
= GGC_CNEW (struct named_label_list
);
2173 ent
->old_value
= IDENTIFIER_LABEL_VALUE (id
);
2174 ent
->next
= named_labels
;
2177 /* We need a new label. */
2178 decl
= make_label_decl (id
, /*local_p=*/0);
2180 /* Now fill in the information we didn't have before. */
2181 ent
->label_decl
= decl
;
2183 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP
, decl
);
2186 /* Declare a local label named ID. */
2189 declare_local_label (tree id
)
2193 /* Add a new entry to the SHADOWED_LABELS list so that when we leave
2194 this scope we can restore the old value of
2195 IDENTIFIER_TYPE_VALUE. */
2196 current_binding_level
->shadowed_labels
2197 = tree_cons (IDENTIFIER_LABEL_VALUE (id
), NULL_TREE
,
2198 current_binding_level
->shadowed_labels
);
2199 /* Look for the label. */
2200 decl
= make_label_decl (id
, /*local_p=*/1);
2201 /* Now fill in the information we didn't have before. */
2202 TREE_VALUE (current_binding_level
->shadowed_labels
) = decl
;
2207 /* Returns nonzero if it is ill-formed to jump past the declaration of
2208 DECL. Returns 2 if it's also a real problem. */
2211 decl_jump_unsafe (tree decl
)
2213 if (TREE_CODE (decl
) != VAR_DECL
|| TREE_STATIC (decl
))
2216 if (DECL_INITIAL (decl
) == NULL_TREE
2217 && pod_type_p (TREE_TYPE (decl
)))
2220 /* This is really only important if we're crossing an initialization.
2221 The POD stuff is just pedantry; why should it matter if the class
2222 contains a field of pointer to member type? */
2223 if (DECL_INITIAL (decl
)
2224 || (TYPE_NEEDS_CONSTRUCTING (TREE_TYPE (decl
))))
2229 /* Check that a single previously seen jump to a newly defined label
2230 is OK. DECL is the LABEL_DECL or 0; LEVEL is the binding_level for
2231 the jump context; NAMES are the names in scope in LEVEL at the jump
2232 context; FILE and LINE are the source position of the jump or 0. */
2235 check_previous_goto_1 (tree decl
,
2236 struct cp_binding_level
* level
,
2237 tree names
, const location_t
*locus
)
2241 struct cp_binding_level
*b
= current_binding_level
;
2242 for (; b
; b
= b
->level_chain
)
2244 tree new_decls
= b
->names
;
2245 tree old_decls
= (b
== level
? names
: NULL_TREE
);
2246 for (; new_decls
!= old_decls
;
2247 new_decls
= TREE_CHAIN (new_decls
))
2249 int problem
= decl_jump_unsafe (new_decls
);
2256 pedwarn ("jump to label %qD", decl
);
2258 pedwarn ("jump to case label");
2261 pedwarn ("%H from here", locus
);
2266 cp_error_at (" crosses initialization of %q#D",
2269 cp_pedwarn_at (" enters scope of non-POD %q#D",
2275 if ((b
->kind
== sk_try
|| b
->kind
== sk_catch
) && ! saw_eh
)
2280 pedwarn ("jump to label %qD", decl
);
2282 pedwarn ("jump to case label");
2285 pedwarn ("%H from here", locus
);
2288 if (b
->kind
== sk_try
)
2289 error (" enters try block");
2291 error (" enters catch block");
2298 check_previous_goto (struct named_label_use_list
* use
)
2300 check_previous_goto_1 (use
->label_decl
, use
->binding_level
,
2301 use
->names_in_scope
, &use
->o_goto_locus
);
2305 check_switch_goto (struct cp_binding_level
* level
)
2307 check_previous_goto_1 (NULL_TREE
, level
, level
->names
, NULL
);
2310 /* Check that any previously seen jumps to a newly defined label DECL
2311 are OK. Called by define_label. */
2314 check_previous_gotos (tree decl
)
2316 struct named_label_use_list
**usep
;
2318 if (! TREE_USED (decl
))
2321 for (usep
= &named_label_uses
; *usep
; )
2323 struct named_label_use_list
*use
= *usep
;
2324 if (use
->label_decl
== decl
)
2326 check_previous_goto (use
);
2330 usep
= &(use
->next
);
2334 /* Check that a new jump to a label DECL is OK. Called by
2335 finish_goto_stmt. */
2338 check_goto (tree decl
)
2342 struct named_label_list
*lab
;
2344 /* We can't know where a computed goto is jumping. So we assume
2346 if (! DECL_P (decl
))
2349 /* If the label hasn't been defined yet, defer checking. */
2350 if (! DECL_INITIAL (decl
))
2356 for (lab
= named_labels
; lab
; lab
= lab
->next
)
2357 if (decl
== lab
->label_decl
)
2360 /* If the label is not on named_labels it's a gcc local label, so
2361 it must be in an outer scope, so jumping to it is always OK. */
2365 if ((lab
->in_try_scope
|| lab
->in_catch_scope
|| lab
->bad_decls
)
2368 cp_pedwarn_at ("jump to label %qD", decl
);
2369 pedwarn (" from here");
2373 for (bad
= lab
->bad_decls
; bad
; bad
= TREE_CHAIN (bad
))
2375 tree b
= TREE_VALUE (bad
);
2376 int u
= decl_jump_unsafe (b
);
2378 if (u
> 1 && DECL_ARTIFICIAL (b
))
2379 /* Can't skip init of __exception_info. */
2380 error ("%J enters catch block", b
);
2382 cp_error_at (" skips initialization of %q#D", b
);
2384 cp_pedwarn_at (" enters scope of non-POD %q#D", b
);
2387 if (lab
->in_try_scope
)
2388 error (" enters try block");
2389 else if (lab
->in_catch_scope
)
2390 error (" enters catch block");
2393 /* Define a label, specifying the location in the source file.
2394 Return the LABEL_DECL node for the label. */
2397 define_label (location_t location
, tree name
)
2399 tree decl
= lookup_label (name
);
2400 struct named_label_list
*ent
;
2401 struct cp_binding_level
*p
;
2403 timevar_push (TV_NAME_LOOKUP
);
2404 for (ent
= named_labels
; ent
; ent
= ent
->next
)
2405 if (ent
->label_decl
== decl
)
2408 /* After labels, make any new cleanups in the function go into their
2409 own new (temporary) binding contour. */
2410 for (p
= current_binding_level
;
2411 p
->kind
!= sk_function_parms
;
2413 p
->more_cleanups_ok
= 0;
2415 if (name
== get_identifier ("wchar_t"))
2416 pedwarn ("label named wchar_t");
2418 if (DECL_INITIAL (decl
) != NULL_TREE
)
2419 error ("duplicate label %qD", decl
);
2422 /* Mark label as having been defined. */
2423 DECL_INITIAL (decl
) = error_mark_node
;
2424 /* Say where in the source. */
2425 DECL_SOURCE_LOCATION (decl
) = location
;
2428 ent
->names_in_scope
= current_binding_level
->names
;
2429 ent
->binding_level
= current_binding_level
;
2431 check_previous_gotos (decl
);
2434 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP
, decl
);
2439 struct cp_binding_level
*level
;
2440 struct cp_switch
*next
;
2441 /* The SWITCH_STMT being built. */
2443 /* A splay-tree mapping the low element of a case range to the high
2444 element, or NULL_TREE if there is no high element. Used to
2445 determine whether or not a new case label duplicates an old case
2446 label. We need a tree, rather than simply a hash table, because
2447 of the GNU case range extension. */
2451 /* A stack of the currently active switch statements. The innermost
2452 switch statement is on the top of the stack. There is no need to
2453 mark the stack for garbage collection because it is only active
2454 during the processing of the body of a function, and we never
2455 collect at that point. */
2457 static struct cp_switch
*switch_stack
;
2459 /* Called right after a switch-statement condition is parsed.
2460 SWITCH_STMT is the switch statement being parsed. */
2463 push_switch (tree switch_stmt
)
2465 struct cp_switch
*p
= xmalloc (sizeof (struct cp_switch
));
2466 p
->level
= current_binding_level
;
2467 p
->next
= switch_stack
;
2468 p
->switch_stmt
= switch_stmt
;
2469 p
->cases
= splay_tree_new (case_compare
, NULL
, NULL
);
2476 struct cp_switch
*cs
= switch_stack
;
2478 /* Emit warnings as needed. */
2479 c_do_switch_warnings (cs
->cases
, cs
->switch_stmt
);
2481 splay_tree_delete (cs
->cases
);
2482 switch_stack
= switch_stack
->next
;
2486 /* Note that we've seen a definition of a case label, and complain if this
2487 is a bad place for one. */
2490 finish_case_label (tree low_value
, tree high_value
)
2493 struct cp_binding_level
*p
;
2495 if (processing_template_decl
)
2499 /* For templates, just add the case label; we'll do semantic
2500 analysis at instantiation-time. */
2501 label
= build_decl (LABEL_DECL
, NULL_TREE
, NULL_TREE
);
2502 return add_stmt (build_case_label (low_value
, high_value
, label
));
2505 /* Find the condition on which this switch statement depends. */
2506 cond
= SWITCH_COND (switch_stack
->switch_stmt
);
2507 if (cond
&& TREE_CODE (cond
) == TREE_LIST
)
2508 cond
= TREE_VALUE (cond
);
2510 r
= c_add_case_label (switch_stack
->cases
, cond
, TREE_TYPE (cond
),
2511 low_value
, high_value
);
2513 check_switch_goto (switch_stack
->level
);
2515 /* After labels, make any new cleanups in the function go into their
2516 own new (temporary) binding contour. */
2517 for (p
= current_binding_level
;
2518 p
->kind
!= sk_function_parms
;
2520 p
->more_cleanups_ok
= 0;
2525 /* Hash a TYPENAME_TYPE. K is really of type `tree'. */
2528 typename_hash (const void* k
)
2533 hash
= (htab_hash_pointer (TYPE_CONTEXT (t
))
2534 ^ htab_hash_pointer (DECL_NAME (TYPE_NAME (t
))));
2539 typedef struct typename_info
{
2547 /* Compare two TYPENAME_TYPEs. K1 and K2 are really of type `tree'. */
2550 typename_compare (const void * k1
, const void * k2
)
2553 const typename_info
*t2
;
2556 t2
= (const typename_info
*) k2
;
2558 return (DECL_NAME (TYPE_NAME (t1
)) == t2
->name
2559 && TYPE_CONTEXT (t1
) == t2
->scope
2560 && TYPENAME_TYPE_FULLNAME (t1
) == t2
->template_id
2561 && TYPENAME_IS_ENUM_P (t1
) == t2
->enum_p
2562 && TYPENAME_IS_CLASS_P (t1
) == t2
->class_p
);
2565 /* Build a TYPENAME_TYPE. If the type is `typename T::t', CONTEXT is
2566 the type of `T', NAME is the IDENTIFIER_NODE for `t'.
2568 Returns the new TYPENAME_TYPE. */
2570 static GTY ((param_is (union tree_node
))) htab_t typename_htab
;
2573 build_typename_type (tree context
, tree name
, tree fullname
,
2574 enum tag_types tag_type
)
2582 if (typename_htab
== NULL
)
2583 typename_htab
= htab_create_ggc (61, &typename_hash
,
2584 &typename_compare
, NULL
);
2586 ti
.scope
= FROB_CONTEXT (context
);
2588 ti
.template_id
= fullname
;
2589 ti
.enum_p
= tag_type
== enum_type
;
2590 ti
.class_p
= (tag_type
== class_type
2591 || tag_type
== record_type
2592 || tag_type
== union_type
);
2593 hash
= (htab_hash_pointer (ti
.scope
)
2594 ^ htab_hash_pointer (ti
.name
));
2596 /* See if we already have this type. */
2597 e
= htab_find_slot_with_hash (typename_htab
, &ti
, hash
, INSERT
);
2602 /* Build the TYPENAME_TYPE. */
2603 t
= make_aggr_type (TYPENAME_TYPE
);
2604 TYPE_CONTEXT (t
) = ti
.scope
;
2605 TYPENAME_TYPE_FULLNAME (t
) = ti
.template_id
;
2606 TYPENAME_IS_ENUM_P (t
) = ti
.enum_p
;
2607 TYPENAME_IS_CLASS_P (t
) = ti
.class_p
;
2609 /* Build the corresponding TYPE_DECL. */
2610 d
= build_decl (TYPE_DECL
, name
, t
);
2611 TYPE_NAME (TREE_TYPE (d
)) = d
;
2612 TYPE_STUB_DECL (TREE_TYPE (d
)) = d
;
2613 DECL_CONTEXT (d
) = FROB_CONTEXT (context
);
2614 DECL_ARTIFICIAL (d
) = 1;
2616 /* Store it in the hash table. */
2623 /* Resolve `typename CONTEXT::NAME'. TAG_TYPE indicates the tag
2624 provided to name the type. Returns an appropriate type, unless an
2625 error occurs, in which case error_mark_node is returned. If we
2626 locate a non-artificial TYPE_DECL and TF_KEEP_TYPE_DECL is set, we
2627 return that, rather than the _TYPE it corresponds to, in other
2628 cases we look through the type decl. If TF_ERROR is set, complain
2629 about errors, otherwise be quiet. */
2632 make_typename_type (tree context
, tree name
, enum tag_types tag_type
,
2633 tsubst_flags_t complain
)
2637 if (name
== error_mark_node
2638 || context
== NULL_TREE
2639 || context
== error_mark_node
)
2640 return error_mark_node
;
2644 if (!(TYPE_LANG_SPECIFIC (name
)
2645 && (CLASSTYPE_IS_TEMPLATE (name
)
2646 || CLASSTYPE_USE_TEMPLATE (name
))))
2647 name
= TYPE_IDENTIFIER (name
);
2649 /* Create a TEMPLATE_ID_EXPR for the type. */
2650 name
= build_nt (TEMPLATE_ID_EXPR
,
2651 CLASSTYPE_TI_TEMPLATE (name
),
2652 CLASSTYPE_TI_ARGS (name
));
2654 else if (TREE_CODE (name
) == TYPE_DECL
)
2655 name
= DECL_NAME (name
);
2659 if (TREE_CODE (name
) == TEMPLATE_ID_EXPR
)
2661 name
= TREE_OPERAND (name
, 0);
2662 if (TREE_CODE (name
) == TEMPLATE_DECL
)
2663 name
= TREE_OPERAND (fullname
, 0) = DECL_NAME (name
);
2665 if (TREE_CODE (name
) == TEMPLATE_DECL
)
2667 error ("%qD used without template parameters", name
);
2668 return error_mark_node
;
2670 gcc_assert (TREE_CODE (name
) == IDENTIFIER_NODE
);
2671 gcc_assert (TYPE_P (context
));
2673 if (!dependent_type_p (context
)
2674 || currently_open_class (context
))
2676 if (TREE_CODE (fullname
) == TEMPLATE_ID_EXPR
)
2678 tree tmpl
= NULL_TREE
;
2679 if (IS_AGGR_TYPE (context
))
2680 tmpl
= lookup_field (context
, name
, 0, false);
2681 if (!tmpl
|| !DECL_CLASS_TEMPLATE_P (tmpl
))
2683 if (complain
& tf_error
)
2684 error ("no class template named %q#T in %q#T",
2686 return error_mark_node
;
2689 if (complain
& tf_error
)
2690 perform_or_defer_access_check (TYPE_BINFO (context
), tmpl
);
2692 return lookup_template_class (tmpl
,
2693 TREE_OPERAND (fullname
, 1),
2695 /*entering_scope=*/0,
2696 tf_error
| tf_warning
| tf_user
);
2702 if (!IS_AGGR_TYPE (context
))
2704 if (complain
& tf_error
)
2705 error ("no type named %q#T in %q#T", name
, context
);
2706 return error_mark_node
;
2709 t
= lookup_field (context
, name
, 0, true);
2712 if (TREE_CODE (t
) != TYPE_DECL
)
2714 if (complain
& tf_error
)
2715 error ("no type named %q#T in %q#T", name
, context
);
2716 return error_mark_node
;
2719 if (complain
& tf_error
)
2720 perform_or_defer_access_check (TYPE_BINFO (context
), t
);
2722 if (DECL_ARTIFICIAL (t
) || !(complain
& tf_keep_type_decl
))
2730 /* If the CONTEXT is not a template type, then either the field is
2731 there now or its never going to be. */
2732 if (!dependent_type_p (context
))
2734 if (complain
& tf_error
)
2735 error ("no type named %q#T in %q#T", name
, context
);
2736 return error_mark_node
;
2739 return build_typename_type (context
, name
, fullname
, tag_type
);
2742 /* Resolve `CONTEXT::template NAME'. Returns a TEMPLATE_DECL if the name
2743 can be resolved or an UNBOUND_CLASS_TEMPLATE, unless an error occurs,
2744 in which case error_mark_node is returned.
2746 If PARM_LIST is non-NULL, also make sure that the template parameter
2747 list of TEMPLATE_DECL matches.
2749 If COMPLAIN zero, don't complain about any errors that occur. */
2752 make_unbound_class_template (tree context
, tree name
, tree parm_list
,
2753 tsubst_flags_t complain
)
2759 name
= TYPE_IDENTIFIER (name
);
2760 else if (DECL_P (name
))
2761 name
= DECL_NAME (name
);
2762 gcc_assert (TREE_CODE (name
) == IDENTIFIER_NODE
);
2764 if (!dependent_type_p (context
)
2765 || currently_open_class (context
))
2767 tree tmpl
= NULL_TREE
;
2769 if (IS_AGGR_TYPE (context
))
2770 tmpl
= lookup_field (context
, name
, 0, false);
2772 if (!tmpl
|| !DECL_CLASS_TEMPLATE_P (tmpl
))
2774 if (complain
& tf_error
)
2775 error ("no class template named %q#T in %q#T", name
, context
);
2776 return error_mark_node
;
2780 && !comp_template_parms (DECL_TEMPLATE_PARMS (tmpl
), parm_list
))
2782 if (complain
& tf_error
)
2784 error ("template parameters do not match template");
2785 cp_error_at ("%qD declared here", tmpl
);
2787 return error_mark_node
;
2790 if (complain
& tf_error
)
2791 perform_or_defer_access_check (TYPE_BINFO (context
), tmpl
);
2796 /* Build the UNBOUND_CLASS_TEMPLATE. */
2797 t
= make_aggr_type (UNBOUND_CLASS_TEMPLATE
);
2798 TYPE_CONTEXT (t
) = FROB_CONTEXT (context
);
2799 TREE_TYPE (t
) = NULL_TREE
;
2801 /* Build the corresponding TEMPLATE_DECL. */
2802 d
= build_decl (TEMPLATE_DECL
, name
, t
);
2803 TYPE_NAME (TREE_TYPE (d
)) = d
;
2804 TYPE_STUB_DECL (TREE_TYPE (d
)) = d
;
2805 DECL_CONTEXT (d
) = FROB_CONTEXT (context
);
2806 DECL_ARTIFICIAL (d
) = 1;
2807 DECL_TEMPLATE_PARMS (d
) = parm_list
;
2814 /* Push the declarations of builtin types into the namespace.
2815 RID_INDEX is the index of the builtin type in the array
2816 RID_POINTERS. NAME is the name used when looking up the builtin
2817 type. TYPE is the _TYPE node for the builtin type. */
2820 record_builtin_type (enum rid rid_index
,
2824 tree rname
= NULL_TREE
, tname
= NULL_TREE
;
2825 tree tdecl
= NULL_TREE
;
2827 if ((int) rid_index
< (int) RID_MAX
)
2828 rname
= ridpointers
[(int) rid_index
];
2830 tname
= get_identifier (name
);
2832 /* The calls to SET_IDENTIFIER_GLOBAL_VALUE below should be
2833 eliminated. Built-in types should not be looked up name; their
2834 names are keywords that the parser can recognize. However, there
2835 is code in c-common.c that uses identifier_global_value to look
2836 up built-in types by name. */
2839 tdecl
= build_decl (TYPE_DECL
, tname
, type
);
2840 DECL_ARTIFICIAL (tdecl
) = 1;
2841 SET_IDENTIFIER_GLOBAL_VALUE (tname
, tdecl
);
2847 tdecl
= build_decl (TYPE_DECL
, rname
, type
);
2848 DECL_ARTIFICIAL (tdecl
) = 1;
2850 SET_IDENTIFIER_GLOBAL_VALUE (rname
, tdecl
);
2853 if (!TYPE_NAME (type
))
2854 TYPE_NAME (type
) = tdecl
;
2857 debug_hooks
->type_decl (tdecl
, 0);
2860 /* Record one of the standard Java types.
2861 * Declare it as having the given NAME.
2862 * If SIZE > 0, it is the size of one of the integral types;
2863 * otherwise it is the negative of the size of one of the other types. */
2866 record_builtin_java_type (const char* name
, int size
)
2870 type
= make_signed_type (size
);
2871 else if (size
> -32)
2872 { /* "__java_char" or ""__java_boolean". */
2873 type
= make_unsigned_type (-size
);
2874 /*if (size == -1) TREE_SET_CODE (type, BOOLEAN_TYPE);*/
2877 { /* "__java_float" or ""__java_double". */
2878 type
= make_node (REAL_TYPE
);
2879 TYPE_PRECISION (type
) = - size
;
2882 record_builtin_type (RID_MAX
, name
, type
);
2883 decl
= TYPE_NAME (type
);
2885 /* Suppress generate debug symbol entries for these types,
2886 since for normal C++ they are just clutter.
2887 However, push_lang_context undoes this if extern "Java" is seen. */
2888 DECL_IGNORED_P (decl
) = 1;
2890 TYPE_FOR_JAVA (type
) = 1;
2894 /* Push a type into the namespace so that the back-ends ignore it. */
2897 record_unknown_type (tree type
, const char* name
)
2899 tree decl
= pushdecl (build_decl (TYPE_DECL
, get_identifier (name
), type
));
2900 /* Make sure the "unknown type" typedecl gets ignored for debug info. */
2901 DECL_IGNORED_P (decl
) = 1;
2902 TYPE_DECL_SUPPRESS_DEBUG (decl
) = 1;
2903 TYPE_SIZE (type
) = TYPE_SIZE (void_type_node
);
2904 TYPE_ALIGN (type
) = 1;
2905 TYPE_USER_ALIGN (type
) = 0;
2906 TYPE_MODE (type
) = TYPE_MODE (void_type_node
);
2909 /* An string for which we should create an IDENTIFIER_NODE at
2912 typedef struct predefined_identifier
2914 /* The name of the identifier. */
2915 const char *const name
;
2916 /* The place where the IDENTIFIER_NODE should be stored. */
2918 /* Nonzero if this is the name of a constructor or destructor. */
2919 const int ctor_or_dtor_p
;
2920 } predefined_identifier
;
2922 /* Create all the predefined identifiers. */
2925 initialize_predefined_identifiers (void)
2927 const predefined_identifier
*pid
;
2929 /* A table of identifiers to create at startup. */
2930 static const predefined_identifier predefined_identifiers
[] = {
2931 { "C++", &lang_name_cplusplus
, 0 },
2932 { "C", &lang_name_c
, 0 },
2933 { "Java", &lang_name_java
, 0 },
2934 /* Some of these names have a trailing space so that it is
2935 impossible for them to conflict with names written by users. */
2936 { "__ct ", &ctor_identifier
, 1 },
2937 { "__base_ctor ", &base_ctor_identifier
, 1 },
2938 { "__comp_ctor ", &complete_ctor_identifier
, 1 },
2939 { "__dt ", &dtor_identifier
, 1 },
2940 { "__comp_dtor ", &complete_dtor_identifier
, 1 },
2941 { "__base_dtor ", &base_dtor_identifier
, 1 },
2942 { "__deleting_dtor ", &deleting_dtor_identifier
, 1 },
2943 { IN_CHARGE_NAME
, &in_charge_identifier
, 0 },
2944 { "nelts", &nelts_identifier
, 0 },
2945 { THIS_NAME
, &this_identifier
, 0 },
2946 { VTABLE_DELTA_NAME
, &delta_identifier
, 0 },
2947 { VTABLE_PFN_NAME
, &pfn_identifier
, 0 },
2948 { "_vptr", &vptr_identifier
, 0 },
2949 { "__vtt_parm", &vtt_parm_identifier
, 0 },
2950 { "::", &global_scope_name
, 0 },
2951 { "std", &std_identifier
, 0 },
2955 for (pid
= predefined_identifiers
; pid
->name
; ++pid
)
2957 *pid
->node
= get_identifier (pid
->name
);
2958 if (pid
->ctor_or_dtor_p
)
2959 IDENTIFIER_CTOR_OR_DTOR_P (*pid
->node
) = 1;
2963 /* Create the predefined scalar types of C,
2964 and some nodes representing standard constants (0, 1, (void *)0).
2965 Initialize the global binding level.
2966 Make definitions for built-in primitive functions. */
2969 cxx_init_decl_processing (void)
2972 tree void_ftype_ptr
;
2974 build_common_tree_nodes (flag_signed_char
, false);
2976 /* Create all the identifiers we need. */
2977 initialize_predefined_identifiers ();
2979 /* Create the global variables. */
2980 push_to_top_level ();
2982 current_function_decl
= NULL_TREE
;
2983 current_binding_level
= NULL
;
2984 /* Enter the global namespace. */
2985 gcc_assert (global_namespace
== NULL_TREE
);
2986 global_namespace
= build_lang_decl (NAMESPACE_DECL
, global_scope_name
,
2988 begin_scope (sk_namespace
, global_namespace
);
2990 current_lang_name
= NULL_TREE
;
2992 /* Adjust various flags based on command-line settings. */
2993 if (!flag_permissive
)
2994 flag_pedantic_errors
= 1;
2995 if (!flag_no_inline
)
2997 flag_inline_trees
= 1;
3000 if (flag_inline_functions
)
3001 flag_inline_trees
= 2;
3003 /* Force minimum function alignment if using the least significant
3004 bit of function pointers to store the virtual bit. */
3005 if (TARGET_PTRMEMFUNC_VBIT_LOCATION
== ptrmemfunc_vbit_in_pfn
3006 && force_align_functions_log
< 1)
3007 force_align_functions_log
= 1;
3010 current_lang_name
= lang_name_c
;
3012 error_mark_list
= build_tree_list (error_mark_node
, error_mark_node
);
3013 TREE_TYPE (error_mark_list
) = error_mark_node
;
3015 /* Create the `std' namespace. */
3016 push_namespace (std_identifier
);
3017 std_node
= current_namespace
;
3020 c_common_nodes_and_builtins ();
3022 java_byte_type_node
= record_builtin_java_type ("__java_byte", 8);
3023 java_short_type_node
= record_builtin_java_type ("__java_short", 16);
3024 java_int_type_node
= record_builtin_java_type ("__java_int", 32);
3025 java_long_type_node
= record_builtin_java_type ("__java_long", 64);
3026 java_float_type_node
= record_builtin_java_type ("__java_float", -32);
3027 java_double_type_node
= record_builtin_java_type ("__java_double", -64);
3028 java_char_type_node
= record_builtin_java_type ("__java_char", -16);
3029 java_boolean_type_node
= record_builtin_java_type ("__java_boolean", -1);
3031 integer_two_node
= build_int_cst (NULL_TREE
, 2);
3032 integer_three_node
= build_int_cst (NULL_TREE
, 3);
3034 record_builtin_type (RID_BOOL
, "bool", boolean_type_node
);
3035 truthvalue_type_node
= boolean_type_node
;
3036 truthvalue_false_node
= boolean_false_node
;
3037 truthvalue_true_node
= boolean_true_node
;
3039 empty_except_spec
= build_tree_list (NULL_TREE
, NULL_TREE
);
3042 record_builtin_type (RID_MAX
, NULL
, string_type_node
);
3045 delta_type_node
= ptrdiff_type_node
;
3046 vtable_index_type
= ptrdiff_type_node
;
3048 vtt_parm_type
= build_pointer_type (const_ptr_type_node
);
3049 void_ftype
= build_function_type (void_type_node
, void_list_node
);
3050 void_ftype_ptr
= build_function_type (void_type_node
,
3051 tree_cons (NULL_TREE
,
3055 = build_exception_variant (void_ftype_ptr
, empty_except_spec
);
3057 /* C++ extensions */
3059 unknown_type_node
= make_node (UNKNOWN_TYPE
);
3060 record_unknown_type (unknown_type_node
, "unknown type");
3062 /* Indirecting an UNKNOWN_TYPE node yields an UNKNOWN_TYPE node. */
3063 TREE_TYPE (unknown_type_node
) = unknown_type_node
;
3065 /* Looking up TYPE_POINTER_TO and TYPE_REFERENCE_TO yield the same
3067 TYPE_POINTER_TO (unknown_type_node
) = unknown_type_node
;
3068 TYPE_REFERENCE_TO (unknown_type_node
) = unknown_type_node
;
3071 /* Make sure we get a unique function type, so we can give
3072 its pointer type a name. (This wins for gdb.) */
3073 tree vfunc_type
= make_node (FUNCTION_TYPE
);
3074 TREE_TYPE (vfunc_type
) = integer_type_node
;
3075 TYPE_ARG_TYPES (vfunc_type
) = NULL_TREE
;
3076 layout_type (vfunc_type
);
3078 vtable_entry_type
= build_pointer_type (vfunc_type
);
3080 record_builtin_type (RID_MAX
, VTBL_PTR_TYPE
, vtable_entry_type
);
3083 = build_cplus_array_type (vtable_entry_type
, NULL_TREE
);
3084 layout_type (vtbl_type_node
);
3085 vtbl_type_node
= build_qualified_type (vtbl_type_node
, TYPE_QUAL_CONST
);
3086 record_builtin_type (RID_MAX
, NULL
, vtbl_type_node
);
3087 vtbl_ptr_type_node
= build_pointer_type (vtable_entry_type
);
3088 layout_type (vtbl_ptr_type_node
);
3089 record_builtin_type (RID_MAX
, NULL
, vtbl_ptr_type_node
);
3091 push_namespace (get_identifier ("__cxxabiv1"));
3092 abi_node
= current_namespace
;
3095 global_type_node
= make_node (LANG_TYPE
);
3096 record_unknown_type (global_type_node
, "global type");
3099 current_lang_name
= lang_name_cplusplus
;
3103 tree bad_alloc_type_node
;
3104 tree bad_alloc_decl
;
3105 tree newtype
, deltype
;
3106 tree ptr_ftype_sizetype
;
3108 push_namespace (std_identifier
);
3109 bad_alloc_id
= get_identifier ("bad_alloc");
3110 bad_alloc_type_node
= make_aggr_type (RECORD_TYPE
);
3111 TYPE_CONTEXT (bad_alloc_type_node
) = current_namespace
;
3113 = create_implicit_typedef (bad_alloc_id
, bad_alloc_type_node
);
3114 DECL_CONTEXT (bad_alloc_decl
) = current_namespace
;
3115 TYPE_STUB_DECL (bad_alloc_type_node
) = bad_alloc_decl
;
3119 = build_function_type (ptr_type_node
,
3120 tree_cons (NULL_TREE
,
3123 newtype
= build_exception_variant
3124 (ptr_ftype_sizetype
, add_exception_specifier
3125 (NULL_TREE
, bad_alloc_type_node
, -1));
3126 deltype
= build_exception_variant (void_ftype_ptr
, empty_except_spec
);
3127 push_cp_library_fn (NEW_EXPR
, newtype
);
3128 push_cp_library_fn (VEC_NEW_EXPR
, newtype
);
3129 global_delete_fndecl
= push_cp_library_fn (DELETE_EXPR
, deltype
);
3130 push_cp_library_fn (VEC_DELETE_EXPR
, deltype
);
3134 = build_library_fn_ptr ("__cxa_pure_virtual", void_ftype
);
3136 /* Perform other language dependent initializations. */
3137 init_class_processing ();
3138 init_rtti_processing ();
3140 if (flag_exceptions
)
3141 init_exception_processing ();
3143 if (! supports_one_only ())
3146 make_fname_decl
= cp_make_fname_decl
;
3147 start_fname_decls ();
3149 /* Show we use EH for cleanups. */
3150 if (flag_exceptions
)
3151 using_eh_for_cleanups ();
3154 /* Generate an initializer for a function naming variable from
3155 NAME. NAME may be NULL, to indicate a dependent name. TYPE_P is
3156 filled in with the type of the init. */
3159 cp_fname_init (const char* name
, tree
*type_p
)
3161 tree domain
= NULL_TREE
;
3163 tree init
= NULL_TREE
;
3168 length
= strlen (name
);
3169 domain
= build_index_type (size_int (length
));
3170 init
= build_string (length
+ 1, name
);
3173 type
= build_qualified_type (char_type_node
, TYPE_QUAL_CONST
);
3174 type
= build_cplus_array_type (type
, domain
);
3179 TREE_TYPE (init
) = type
;
3181 init
= error_mark_node
;
3186 /* Create the VAR_DECL for __FUNCTION__ etc. ID is the name to give the
3187 decl, NAME is the initialization string and TYPE_DEP indicates whether
3188 NAME depended on the type of the function. We make use of that to detect
3189 __PRETTY_FUNCTION__ inside a template fn. This is being done
3190 lazily at the point of first use, so we mustn't push the decl now. */
3193 cp_make_fname_decl (tree id
, int type_dep
)
3195 const char *const name
= (type_dep
&& processing_template_decl
3196 ? NULL
: fname_as_string (type_dep
));
3198 tree init
= cp_fname_init (name
, &type
);
3199 tree decl
= build_decl (VAR_DECL
, id
, type
);
3202 free ((char *) name
);
3204 /* As we're using pushdecl_with_scope, we must set the context. */
3205 DECL_CONTEXT (decl
) = current_function_decl
;
3206 DECL_PRETTY_FUNCTION_P (decl
) = type_dep
;
3208 TREE_STATIC (decl
) = 1;
3209 TREE_READONLY (decl
) = 1;
3210 DECL_ARTIFICIAL (decl
) = 1;
3211 DECL_INITIAL (decl
) = init
;
3213 TREE_USED (decl
) = 1;
3215 if (current_function_decl
)
3217 struct cp_binding_level
*b
= current_binding_level
;
3218 while (b
->level_chain
->kind
!= sk_function_parms
)
3220 pushdecl_with_scope (decl
, b
);
3221 cp_finish_decl (decl
, init
, NULL_TREE
, LOOKUP_ONLYCONVERTING
);
3224 pushdecl_top_level_and_finish (decl
, init
);
3229 /* Make a definition for a builtin function named NAME in the current
3230 namespace, whose data type is TYPE and whose context is CONTEXT.
3231 TYPE should be a function type with argument types.
3233 CLASS and CODE tell later passes how to compile calls to this function.
3234 See tree.h for possible values.
3236 If LIBNAME is nonzero, use that for DECL_ASSEMBLER_NAME,
3237 the name to be called if we can't opencode the function.
3238 If ATTRS is nonzero, use that for the function's attribute
3242 builtin_function_1 (const char* name
,
3245 enum built_in_function code
,
3246 enum built_in_class
class,
3247 const char* libname
,
3250 tree decl
= build_library_fn_1 (get_identifier (name
), ERROR_MARK
, type
);
3251 DECL_BUILT_IN_CLASS (decl
) = class;
3252 DECL_FUNCTION_CODE (decl
) = code
;
3253 DECL_CONTEXT (decl
) = context
;
3257 /* Since `pushdecl' relies on DECL_ASSEMBLER_NAME instead of DECL_NAME,
3258 we cannot change DECL_ASSEMBLER_NAME until we have installed this
3259 function in the namespace. */
3261 SET_DECL_ASSEMBLER_NAME (decl
, get_identifier (libname
));
3263 /* Warn if a function in the namespace for users
3264 is used without an occasion to consider it declared. */
3265 if (name
[0] != '_' || name
[1] != '_')
3266 DECL_ANTICIPATED (decl
) = 1;
3268 /* Possibly apply some default attributes to this built-in function. */
3270 decl_attributes (&decl
, attrs
, ATTR_FLAG_BUILT_IN
);
3272 decl_attributes (&decl
, NULL_TREE
, 0);
3277 /* Entry point for the benefit of c_common_nodes_and_builtins.
3279 Make a definition for a builtin function named NAME and whose data type
3280 is TYPE. TYPE should be a function type with argument types. This
3281 function places the anticipated declaration in the global namespace
3282 and additionally in the std namespace if appropriate.
3284 CLASS and CODE tell later passes how to compile calls to this function.
3285 See tree.h for possible values.
3287 If LIBNAME is nonzero, use that for DECL_ASSEMBLER_NAME,
3288 the name to be called if we can't opencode the function.
3290 If ATTRS is nonzero, use that for the function's attribute
3294 builtin_function (const char* name
,
3297 enum built_in_class cl
,
3298 const char* libname
,
3301 /* All builtins that don't begin with an '_' should additionally
3302 go in the 'std' namespace. */
3305 push_namespace (std_identifier
);
3306 builtin_function_1 (name
, type
, std_node
, code
, cl
, libname
, attrs
);
3310 return builtin_function_1 (name
, type
, NULL_TREE
, code
,
3311 cl
, libname
, attrs
);
3314 /* Generate a FUNCTION_DECL with the typical flags for a runtime library
3315 function. Not called directly. */
3318 build_library_fn_1 (tree name
, enum tree_code operator_code
, tree type
)
3320 tree fn
= build_lang_decl (FUNCTION_DECL
, name
, type
);
3321 DECL_EXTERNAL (fn
) = 1;
3322 TREE_PUBLIC (fn
) = 1;
3323 DECL_ARTIFICIAL (fn
) = 1;
3324 TREE_NOTHROW (fn
) = 1;
3325 SET_OVERLOADED_OPERATOR_CODE (fn
, operator_code
);
3326 SET_DECL_LANGUAGE (fn
, lang_c
);
3327 /* Runtime library routines are, by definition, available in an
3328 external shared object. */
3329 DECL_VISIBILITY (fn
) = VISIBILITY_DEFAULT
;
3330 DECL_VISIBILITY_SPECIFIED (fn
) = 1;
3334 /* Returns the _DECL for a library function with C linkage.
3335 We assume that such functions never throw; if this is incorrect,
3336 callers should unset TREE_NOTHROW. */
3339 build_library_fn (tree name
, tree type
)
3341 return build_library_fn_1 (name
, ERROR_MARK
, type
);
3344 /* Returns the _DECL for a library function with C++ linkage. */
3347 build_cp_library_fn (tree name
, enum tree_code operator_code
, tree type
)
3349 tree fn
= build_library_fn_1 (name
, operator_code
, type
);
3350 TREE_NOTHROW (fn
) = TYPE_NOTHROW_P (type
);
3351 DECL_CONTEXT (fn
) = FROB_CONTEXT (current_namespace
);
3352 SET_DECL_LANGUAGE (fn
, lang_cplusplus
);
3356 /* Like build_library_fn, but takes a C string instead of an
3360 build_library_fn_ptr (const char* name
, tree type
)
3362 return build_library_fn (get_identifier (name
), type
);
3365 /* Like build_cp_library_fn, but takes a C string instead of an
3369 build_cp_library_fn_ptr (const char* name
, tree type
)
3371 return build_cp_library_fn (get_identifier (name
), ERROR_MARK
, type
);
3374 /* Like build_library_fn, but also pushes the function so that we will
3375 be able to find it via IDENTIFIER_GLOBAL_VALUE. */
3378 push_library_fn (tree name
, tree type
)
3380 tree fn
= build_library_fn (name
, type
);
3381 pushdecl_top_level (fn
);
3385 /* Like build_cp_library_fn, but also pushes the function so that it
3386 will be found by normal lookup. */
3389 push_cp_library_fn (enum tree_code operator_code
, tree type
)
3391 tree fn
= build_cp_library_fn (ansi_opname (operator_code
),
3398 /* Like push_library_fn, but takes a TREE_LIST of parm types rather than
3402 push_void_library_fn (tree name
, tree parmtypes
)
3404 tree type
= build_function_type (void_type_node
, parmtypes
);
3405 return push_library_fn (name
, type
);
3408 /* Like push_library_fn, but also note that this function throws
3409 and does not return. Used for __throw_foo and the like. */
3412 push_throw_library_fn (tree name
, tree type
)
3414 tree fn
= push_library_fn (name
, type
);
3415 TREE_THIS_VOLATILE (fn
) = 1;
3416 TREE_NOTHROW (fn
) = 0;
3420 /* When we call finish_struct for an anonymous union, we create
3421 default copy constructors and such. But, an anonymous union
3422 shouldn't have such things; this function undoes the damage to the
3423 anonymous union type T.
3425 (The reason that we create the synthesized methods is that we don't
3426 distinguish `union { int i; }' from `typedef union { int i; } U'.
3427 The first is an anonymous union; the second is just an ordinary
3431 fixup_anonymous_aggr (tree t
)
3435 /* Wipe out memory of synthesized methods. */
3436 TYPE_HAS_CONSTRUCTOR (t
) = 0;
3437 TYPE_HAS_DEFAULT_CONSTRUCTOR (t
) = 0;
3438 TYPE_HAS_INIT_REF (t
) = 0;
3439 TYPE_HAS_CONST_INIT_REF (t
) = 0;
3440 TYPE_HAS_ASSIGN_REF (t
) = 0;
3441 TYPE_HAS_CONST_ASSIGN_REF (t
) = 0;
3443 /* Splice the implicitly generated functions out of the TYPE_METHODS
3445 q
= &TYPE_METHODS (t
);
3448 if (DECL_ARTIFICIAL (*q
))
3449 *q
= TREE_CHAIN (*q
);
3451 q
= &TREE_CHAIN (*q
);
3454 /* ISO C++ 9.5.3. Anonymous unions may not have function members. */
3455 if (TYPE_METHODS (t
))
3456 error ("%Jan anonymous union cannot have function members",
3457 TYPE_MAIN_DECL (t
));
3459 /* Anonymous aggregates cannot have fields with ctors, dtors or complex
3460 assignment operators (because they cannot have these methods themselves).
3461 For anonymous unions this is already checked because they are not allowed
3462 in any union, otherwise we have to check it. */
3463 if (TREE_CODE (t
) != UNION_TYPE
)
3467 for (field
= TYPE_FIELDS (t
); field
; field
= TREE_CHAIN (field
))
3468 if (TREE_CODE (field
) == FIELD_DECL
)
3470 type
= TREE_TYPE (field
);
3471 if (CLASS_TYPE_P (type
))
3473 if (TYPE_NEEDS_CONSTRUCTING (type
))
3474 cp_error_at ("member %q#D with constructor not allowed "
3475 "in anonymous aggregate",
3477 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type
))
3478 cp_error_at ("member %q#D with destructor not allowed "
3479 "in anonymous aggregate",
3481 if (TYPE_HAS_COMPLEX_ASSIGN_REF (type
))
3482 cp_error_at ("member %q#D with copy assignment operator "
3483 "not allowed in anonymous aggregate",
3490 /* Make sure that a declaration with no declarator is well-formed, i.e.
3491 just declares a tagged type or anonymous union.
3493 Returns the type declared; or NULL_TREE if none. */
3496 check_tag_decl (cp_decl_specifier_seq
*declspecs
)
3498 int saw_friend
= declspecs
->specs
[(int)ds_friend
] != 0;
3499 int saw_typedef
= declspecs
->specs
[(int)ds_typedef
] != 0;
3500 /* If a class, struct, or enum type is declared by the DECLSPECS
3501 (i.e, if a class-specifier, enum-specifier, or non-typename
3502 elaborated-type-specifier appears in the DECLSPECS),
3503 DECLARED_TYPE is set to the corresponding type. */
3504 tree declared_type
= NULL_TREE
;
3505 bool error_p
= false;
3507 if (declspecs
->multiple_types_p
)
3508 error ("multiple types in one declaration");
3509 else if (declspecs
->redefined_builtin_type
)
3511 if (!in_system_header
)
3512 pedwarn ("redeclaration of C++ built-in type %qT",
3513 declspecs
->redefined_builtin_type
);
3517 if (TYPE_P (declspecs
->type
)
3518 && ((TREE_CODE (declspecs
->type
) != TYPENAME_TYPE
3519 && IS_AGGR_TYPE (declspecs
->type
))
3520 || TREE_CODE (declspecs
->type
) == ENUMERAL_TYPE
))
3521 declared_type
= declspecs
->type
;
3522 else if (declspecs
->type
== error_mark_node
)
3524 if (declared_type
== NULL_TREE
&& ! saw_friend
&& !error_p
)
3525 pedwarn ("declaration does not declare anything");
3526 /* Check for an anonymous union. */
3527 else if (declared_type
&& IS_AGGR_TYPE_CODE (TREE_CODE (declared_type
))
3528 && TYPE_ANONYMOUS_P (declared_type
))
3530 /* 7/3 In a simple-declaration, the optional init-declarator-list
3531 can be omitted only when declaring a class (clause 9) or
3532 enumeration (7.2), that is, when the decl-specifier-seq contains
3533 either a class-specifier, an elaborated-type-specifier with
3534 a class-key (9.1), or an enum-specifier. In these cases and
3535 whenever a class-specifier or enum-specifier is present in the
3536 decl-specifier-seq, the identifiers in these specifiers are among
3537 the names being declared by the declaration (as class-name,
3538 enum-names, or enumerators, depending on the syntax). In such
3539 cases, and except for the declaration of an unnamed bit-field (9.6),
3540 the decl-specifier-seq shall introduce one or more names into the
3541 program, or shall redeclare a name introduced by a previous
3542 declaration. [Example:
3543 enum { }; // ill-formed
3544 typedef class { }; // ill-formed
3548 error ("missing type-name in typedef-declaration");
3551 /* Anonymous unions are objects, so they can have specifiers. */;
3552 SET_ANON_AGGR_TYPE_P (declared_type
);
3554 if (TREE_CODE (declared_type
) != UNION_TYPE
&& pedantic
3555 && !in_system_header
)
3556 pedwarn ("ISO C++ prohibits anonymous structs");
3561 if (declspecs
->specs
[(int)ds_inline
]
3562 || declspecs
->specs
[(int)ds_virtual
])
3563 error ("%qs can only be specified for functions",
3564 declspecs
->specs
[(int)ds_inline
]
3565 ? "inline" : "virtual");
3567 && (!current_class_type
3568 || current_scope () != current_class_type
))
3569 error ("%<friend%> can only be specified inside a class");
3570 else if (declspecs
->specs
[(int)ds_explicit
])
3571 error ("%<explicit%> can only be specified for constructors");
3572 else if (declspecs
->storage_class
)
3573 error ("a storage class can only be specified for objects "
3575 else if (declspecs
->specs
[(int)ds_const
]
3576 || declspecs
->specs
[(int)ds_volatile
]
3577 || declspecs
->specs
[(int)ds_restrict
]
3578 || declspecs
->specs
[(int)ds_thread
])
3579 error ("qualifiers can only be specified for objects "
3583 return declared_type
;
3586 /* Called when a declaration is seen that contains no names to declare.
3587 If its type is a reference to a structure, union or enum inherited
3588 from a containing scope, shadow that tag name for the current scope
3589 with a forward reference.
3590 If its type defines a new named structure or union
3591 or defines an enum, it is valid but we need not do anything here.
3592 Otherwise, it is an error.
3594 C++: may have to grok the declspecs to learn about static,
3595 complain for anonymous unions.
3597 Returns the TYPE declared -- or NULL_TREE if none. */
3600 shadow_tag (cp_decl_specifier_seq
*declspecs
)
3602 tree t
= check_tag_decl (declspecs
);
3607 if (declspecs
->attributes
)
3609 cp_warning_at ("attribute ignored in declaration of %q#T", t
);
3610 cp_warning_at ("attribute for %q#T must follow the %qs keyword",
3612 class_key_or_enum_as_string (t
));
3616 maybe_process_partial_specialization (t
);
3618 /* This is where the variables in an anonymous union are
3619 declared. An anonymous union declaration looks like:
3621 because there is no declarator after the union, the parser
3622 sends that declaration here. */
3623 if (ANON_AGGR_TYPE_P (t
))
3625 fixup_anonymous_aggr (t
);
3627 if (TYPE_FIELDS (t
))
3629 tree decl
= grokdeclarator (/*declarator=*/NULL
,
3630 declspecs
, NORMAL
, 0, NULL
);
3631 finish_anon_union (decl
);
3638 /* Decode a "typename", such as "int **", returning a ..._TYPE node. */
3641 groktypename (cp_decl_specifier_seq
*type_specifiers
,
3642 const cp_declarator
*declarator
)
3646 attrs
= type_specifiers
->attributes
;
3647 type_specifiers
->attributes
= NULL_TREE
;
3648 type
= grokdeclarator (declarator
, type_specifiers
, TYPENAME
, 0, &attrs
);
3650 cplus_decl_attributes (&type
, attrs
, 0);
3654 /* Decode a declarator in an ordinary declaration or data definition.
3655 This is called as soon as the type information and variable name
3656 have been parsed, before parsing the initializer if any.
3657 Here we create the ..._DECL node, fill in its type,
3658 and put it on the list of decls for the current context.
3659 The ..._DECL node is returned as the value.
3661 Exception: for arrays where the length is not specified,
3662 the type is left null, to be filled in by `cp_finish_decl'.
3664 Function definitions do not come here; they go to start_function
3665 instead. However, external and forward declarations of functions
3666 do go through here. Structure field declarations are done by
3667 grokfield and not through here. */
3670 start_decl (const cp_declarator
*declarator
,
3671 cp_decl_specifier_seq
*declspecs
,
3674 tree prefix_attributes
,
3681 *pop_scope_p
= false;
3683 /* This should only be done once on the top most decl. */
3684 if (have_extern_spec
)
3686 declspecs
->storage_class
= sc_extern
;
3687 have_extern_spec
= false;
3690 /* An object declared as __attribute__((deprecated)) suppresses
3691 warnings of uses of other deprecated items. */
3692 if (lookup_attribute ("deprecated", attributes
))
3693 deprecated_state
= DEPRECATED_SUPPRESS
;
3695 attributes
= chainon (attributes
, prefix_attributes
);
3697 decl
= grokdeclarator (declarator
, declspecs
, NORMAL
, initialized
,
3700 deprecated_state
= DEPRECATED_NORMAL
;
3702 if (decl
== NULL_TREE
|| TREE_CODE (decl
) == VOID_TYPE
)
3703 return error_mark_node
;
3705 type
= TREE_TYPE (decl
);
3707 if (type
== error_mark_node
)
3708 return error_mark_node
;
3710 context
= DECL_CONTEXT (decl
);
3713 *pop_scope_p
= push_scope (context
);
3715 /* We are only interested in class contexts, later. */
3716 if (context
&& TREE_CODE (context
) == NAMESPACE_DECL
)
3717 context
= NULL_TREE
;
3720 /* Is it valid for this decl to have an initializer at all?
3721 If not, set INITIALIZED to zero, which will indirectly
3722 tell `cp_finish_decl' to ignore the initializer once it is parsed. */
3723 switch (TREE_CODE (decl
))
3726 error ("typedef %qD is initialized (use __typeof__ instead)", decl
);
3731 error ("function %q#D is initialized like a variable", decl
);
3741 if (! toplevel_bindings_p ()
3742 && DECL_EXTERNAL (decl
))
3743 warning ("declaration of %q#D has %<extern%> and is initialized",
3745 DECL_EXTERNAL (decl
) = 0;
3746 if (toplevel_bindings_p ())
3747 TREE_STATIC (decl
) = 1;
3749 /* Tell `pushdecl' this is an initialized decl
3750 even though we don't yet have the initializer expression.
3751 Also tell `cp_finish_decl' it may store the real initializer. */
3752 DECL_INITIAL (decl
) = error_mark_node
;
3755 /* Set attributes here so if duplicate decl, will have proper attributes. */
3756 cplus_decl_attributes (&decl
, attributes
, 0);
3758 /* If #pragma weak was used, mark the decl weak now. */
3759 if (global_scope_p (current_binding_level
))
3760 maybe_apply_pragma_weak (decl
);
3762 if (TREE_CODE (decl
) == FUNCTION_DECL
3763 && DECL_DECLARED_INLINE_P (decl
)
3764 && DECL_UNINLINABLE (decl
)
3765 && lookup_attribute ("noinline", DECL_ATTRIBUTES (decl
)))
3766 warning ("%Jinline function %qD given attribute noinline", decl
, decl
);
3768 if (context
&& COMPLETE_TYPE_P (complete_type (context
)))
3770 if (TREE_CODE (decl
) == VAR_DECL
)
3772 tree field
= lookup_field (context
, DECL_NAME (decl
), 0, false);
3773 if (field
== NULL_TREE
|| TREE_CODE (field
) != VAR_DECL
)
3774 error ("%q#D is not a static member of %q#T", decl
, context
);
3777 if (DECL_CONTEXT (field
) != context
)
3779 if (!same_type_p (DECL_CONTEXT (field
), context
))
3780 pedwarn ("ISO C++ does not permit %<%T::%D%> "
3781 "to be defined as %<%T::%D%>",
3782 DECL_CONTEXT (field
), DECL_NAME (decl
),
3783 context
, DECL_NAME (decl
));
3784 DECL_CONTEXT (decl
) = DECL_CONTEXT (field
);
3786 if (processing_specialization
3787 && template_class_depth (context
) == 0
3788 && CLASSTYPE_TEMPLATE_SPECIALIZATION (context
))
3789 error ("template header not allowed in member definition "
3790 "of explicitly specialized class");
3791 /* Static data member are tricky; an in-class initialization
3792 still doesn't provide a definition, so the in-class
3793 declaration will have DECL_EXTERNAL set, but will have an
3794 initialization. Thus, duplicate_decls won't warn
3795 about this situation, and so we check here. */
3796 if (DECL_INITIAL (decl
) && DECL_INITIAL (field
))
3797 error ("duplicate initialization of %qD", decl
);
3798 if (duplicate_decls (decl
, field
))
3804 tree field
= check_classfn (context
, decl
,
3805 (processing_template_decl
3806 > template_class_depth (context
))
3807 ? current_template_parms
3809 if (field
&& duplicate_decls (decl
, field
))
3813 /* cp_finish_decl sets DECL_EXTERNAL if DECL_IN_AGGR_P is set. */
3814 DECL_IN_AGGR_P (decl
) = 0;
3815 if ((DECL_LANG_SPECIFIC (decl
) && DECL_USE_TEMPLATE (decl
))
3816 || CLASSTYPE_TEMPLATE_INSTANTIATION (context
))
3818 SET_DECL_TEMPLATE_SPECIALIZATION (decl
);
3819 /* [temp.expl.spec] An explicit specialization of a static data
3820 member of a template is a definition if the declaration
3821 includes an initializer; otherwise, it is a declaration.
3823 We check for processing_specialization so this only applies
3824 to the new specialization syntax. */
3825 if (DECL_INITIAL (decl
) == NULL_TREE
&& processing_specialization
)
3826 DECL_EXTERNAL (decl
) = 1;
3829 if (DECL_EXTERNAL (decl
) && ! DECL_TEMPLATE_SPECIALIZATION (decl
))
3830 pedwarn ("declaration of %q#D outside of class is not definition",
3834 /* Enter this declaration into the symbol table. */
3835 tem
= maybe_push_decl (decl
);
3837 if (processing_template_decl
)
3838 tem
= push_template_decl (tem
);
3839 if (tem
== error_mark_node
)
3840 return error_mark_node
;
3842 #if ! defined (ASM_OUTPUT_BSS) && ! defined (ASM_OUTPUT_ALIGNED_BSS)
3843 /* Tell the back-end to use or not use .common as appropriate. If we say
3844 -fconserve-space, we want this to save .data space, at the expense of
3845 wrong semantics. If we say -fno-conserve-space, we want this to
3846 produce errors about redefs; to do this we force variables into the
3848 DECL_COMMON (tem
) = ((TREE_CODE (tem
) != VAR_DECL
3849 || !DECL_THREAD_LOCAL (tem
))
3850 && (flag_conserve_space
|| ! TREE_PUBLIC (tem
)));
3853 if (! processing_template_decl
)
3860 start_decl_1 (tree decl
)
3862 tree type
= TREE_TYPE (decl
);
3863 int initialized
= (DECL_INITIAL (decl
) != NULL_TREE
);
3865 if (type
== error_mark_node
)
3869 /* Is it valid for this decl to have an initializer at all?
3870 If not, set INITIALIZED to zero, which will indirectly
3871 tell `cp_finish_decl' to ignore the initializer once it is parsed. */
3873 /* Don't allow initializations for incomplete types except for
3874 arrays which might be completed by the initialization. */
3875 if (COMPLETE_TYPE_P (complete_type (type
)))
3876 ; /* A complete type is ok. */
3877 else if (TREE_CODE (type
) != ARRAY_TYPE
)
3879 error ("variable %q#D has initializer but incomplete type", decl
);
3881 type
= TREE_TYPE (decl
) = error_mark_node
;
3883 else if (!COMPLETE_TYPE_P (complete_type (TREE_TYPE (type
))))
3885 if (DECL_LANG_SPECIFIC (decl
) && DECL_TEMPLATE_INFO (decl
))
3886 error ("elements of array %q#D have incomplete type", decl
);
3887 /* else we already gave an error in start_decl. */
3893 && TREE_CODE (decl
) != TYPE_DECL
3894 && TREE_CODE (decl
) != TEMPLATE_DECL
3895 && type
!= error_mark_node
3896 && IS_AGGR_TYPE (type
)
3897 && ! DECL_EXTERNAL (decl
))
3899 if ((! processing_template_decl
|| ! uses_template_parms (type
))
3900 && !COMPLETE_TYPE_P (complete_type (type
)))
3902 error ("aggregate %q#D has incomplete type and cannot be defined",
3904 /* Change the type so that assemble_variable will give
3905 DECL an rtl we can live with: (mem (const_int 0)). */
3906 type
= TREE_TYPE (decl
) = error_mark_node
;
3910 /* If any base type in the hierarchy of TYPE needs a constructor,
3911 then we set initialized to 1. This way any nodes which are
3912 created for the purposes of initializing this aggregate
3913 will live as long as it does. This is necessary for global
3914 aggregates which do not have their initializers processed until
3915 the end of the file. */
3916 initialized
= TYPE_NEEDS_CONSTRUCTING (type
);
3921 DECL_INITIAL (decl
) = NULL_TREE
;
3923 /* Create a new scope to hold this declaration if necessary.
3924 Whether or not a new scope is necessary cannot be determined
3925 until after the type has been completed; if the type is a
3926 specialization of a class template it is not until after
3927 instantiation has occurred that TYPE_HAS_NONTRIVIAL_DESTRUCTOR
3928 will be set correctly. */
3929 maybe_push_cleanup_level (type
);
3932 /* Handle initialization of references. DECL, TYPE, and INIT have the
3933 same meaning as in cp_finish_decl. *CLEANUP must be NULL on entry,
3934 but will be set to a new CLEANUP_STMT if a temporary is created
3935 that must be destroyed subsequently.
3937 Returns an initializer expression to use to initialize DECL, or
3938 NULL if the initialization can be performed statically.
3940 Quotes on semantics can be found in ARM 8.4.3. */
3943 grok_reference_init (tree decl
, tree type
, tree init
, tree
*cleanup
)
3947 if (init
== NULL_TREE
)
3949 if ((DECL_LANG_SPECIFIC (decl
) == 0
3950 || DECL_IN_AGGR_P (decl
) == 0)
3951 && ! DECL_THIS_EXTERN (decl
))
3952 error ("%qD declared as reference but not initialized", decl
);
3956 if (TREE_CODE (init
) == CONSTRUCTOR
)
3958 error ("ISO C++ forbids use of initializer list to "
3959 "initialize reference %qD", decl
);
3963 if (TREE_CODE (init
) == TREE_LIST
)
3964 init
= build_x_compound_expr_from_list (init
, "initializer");
3966 if (TREE_CODE (TREE_TYPE (type
)) != ARRAY_TYPE
3967 && TREE_CODE (TREE_TYPE (init
)) == ARRAY_TYPE
)
3968 /* Note: default conversion is only called in very special cases. */
3969 init
= decay_conversion (init
);
3971 /* Convert INIT to the reference type TYPE. This may involve the
3972 creation of a temporary, whose lifetime must be the same as that
3973 of the reference. If so, a DECL_EXPR for the temporary will be
3974 added just after the DECL_EXPR for DECL. That's why we don't set
3975 DECL_INITIAL for local references (instead assigning to them
3976 explicitly); we need to allow the temporary to be initialized
3978 tmp
= initialize_reference (type
, init
, decl
, cleanup
);
3980 if (tmp
== error_mark_node
)
3982 else if (tmp
== NULL_TREE
)
3984 error ("cannot initialize %qT from %qT", type
, TREE_TYPE (init
));
3988 if (TREE_STATIC (decl
) && !TREE_CONSTANT (tmp
))
3991 DECL_INITIAL (decl
) = tmp
;
3996 /* When parsing `int a[] = {1, 2};' we don't know the size of the
3997 array until we finish parsing the initializer. If that's the
3998 situation we're in, update DECL accordingly. */
4001 maybe_deduce_size_from_array_init (tree decl
, tree init
)
4003 tree type
= TREE_TYPE (decl
);
4005 if (TREE_CODE (type
) == ARRAY_TYPE
4006 && TYPE_DOMAIN (type
) == NULL_TREE
4007 && TREE_CODE (decl
) != TYPE_DECL
)
4009 /* do_default is really a C-ism to deal with tentative definitions.
4010 But let's leave it here to ease the eventual merge. */
4011 int do_default
= !DECL_EXTERNAL (decl
);
4012 tree initializer
= init
? init
: DECL_INITIAL (decl
);
4013 int failure
= complete_array_type (type
, initializer
, do_default
);
4016 error ("initializer fails to determine size of %qD", decl
);
4021 error ("array size missing in %qD", decl
);
4022 /* If a `static' var's size isn't known, make it extern as
4023 well as static, so it does not get allocated. If it's not
4024 `static', then don't mark it extern; finish_incomplete_decl
4025 will give it a default size and it will get allocated. */
4026 else if (!pedantic
&& TREE_STATIC (decl
) && !TREE_PUBLIC (decl
))
4027 DECL_EXTERNAL (decl
) = 1;
4030 if (pedantic
&& TYPE_DOMAIN (type
) != NULL_TREE
4031 && tree_int_cst_lt (TYPE_MAX_VALUE (TYPE_DOMAIN (type
)),
4033 error ("zero-size array %qD", decl
);
4035 layout_decl (decl
, 0);
4039 /* Set DECL_SIZE, DECL_ALIGN, etc. for DECL (a VAR_DECL), and issue
4040 any appropriate error messages regarding the layout. */
4043 layout_var_decl (tree decl
)
4045 tree type
= TREE_TYPE (decl
);
4047 tree ttype
= target_type (type
);
4050 /* If we haven't already layed out this declaration, do so now.
4051 Note that we must not call complete type for an external object
4052 because it's type might involve templates that we are not
4053 supposed to instantiate yet. (And it's perfectly valid to say
4054 `extern X x' for some incomplete type `X'.) */
4055 if (!DECL_EXTERNAL (decl
))
4056 complete_type (type
);
4057 if (!DECL_SIZE (decl
)
4058 && TREE_TYPE (decl
) != error_mark_node
4059 && (COMPLETE_TYPE_P (type
)
4060 || (TREE_CODE (type
) == ARRAY_TYPE
4061 && !TYPE_DOMAIN (type
)
4062 && COMPLETE_TYPE_P (TREE_TYPE (type
)))))
4063 layout_decl (decl
, 0);
4065 if (!DECL_EXTERNAL (decl
) && DECL_SIZE (decl
) == NULL_TREE
)
4067 /* An automatic variable with an incomplete type: that is an error.
4068 Don't talk about array types here, since we took care of that
4069 message in grokdeclarator. */
4070 error ("storage size of %qD isn't known", decl
);
4071 TREE_TYPE (decl
) = error_mark_node
;
4074 /* Keep this code around in case we later want to control debug info
4075 based on whether a type is "used". (jason 1999-11-11) */
4077 else if (!DECL_EXTERNAL (decl
) && IS_AGGR_TYPE (ttype
))
4078 /* Let debugger know it should output info for this type. */
4079 note_debug_info_needed (ttype
);
4081 if (TREE_STATIC (decl
) && DECL_CLASS_SCOPE_P (decl
))
4082 note_debug_info_needed (DECL_CONTEXT (decl
));
4085 if ((DECL_EXTERNAL (decl
) || TREE_STATIC (decl
))
4086 && DECL_SIZE (decl
) != NULL_TREE
4087 && ! TREE_CONSTANT (DECL_SIZE (decl
)))
4089 if (TREE_CODE (DECL_SIZE (decl
)) == INTEGER_CST
)
4090 constant_expression_warning (DECL_SIZE (decl
));
4092 error ("storage size of %qD isn't constant", decl
);
4095 if (TREE_STATIC (decl
)
4096 && !DECL_ARTIFICIAL (decl
)
4097 && current_function_decl
4098 && DECL_CONTEXT (decl
) == current_function_decl
)
4099 push_local_name (decl
);
4102 /* If a local static variable is declared in an inline function, or if
4103 we have a weak definition, we must endeavor to create only one
4104 instance of the variable at link-time. */
4107 maybe_commonize_var (tree decl
)
4109 /* Static data in a function with comdat linkage also has comdat
4111 if (TREE_STATIC (decl
)
4112 /* Don't mess with __FUNCTION__. */
4113 && ! DECL_ARTIFICIAL (decl
)
4114 && DECL_FUNCTION_SCOPE_P (decl
)
4115 /* Unfortunately, import_export_decl has not always been called
4116 before the function is processed, so we cannot simply check
4118 && (DECL_COMDAT (DECL_CONTEXT (decl
))
4119 || ((DECL_DECLARED_INLINE_P (DECL_CONTEXT (decl
))
4120 || DECL_TEMPLATE_INSTANTIATION (DECL_CONTEXT (decl
)))
4121 && TREE_PUBLIC (DECL_CONTEXT (decl
)))))
4125 /* With weak symbols, we simply make the variable COMDAT;
4126 that will cause copies in multiple translations units to
4128 comdat_linkage (decl
);
4132 if (DECL_INITIAL (decl
) == NULL_TREE
4133 || DECL_INITIAL (decl
) == error_mark_node
)
4135 /* Without weak symbols, we can use COMMON to merge
4136 uninitialized variables. */
4137 TREE_PUBLIC (decl
) = 1;
4138 DECL_COMMON (decl
) = 1;
4142 /* While for initialized variables, we must use internal
4143 linkage -- which means that multiple copies will not
4145 TREE_PUBLIC (decl
) = 0;
4146 DECL_COMMON (decl
) = 0;
4147 cp_warning_at ("sorry: semantics of inline function static "
4148 "data %q#D are wrong (you'll wind up "
4149 "with multiple copies)", decl
);
4150 warning ("%J you can work around this by removing "
4156 else if (DECL_LANG_SPECIFIC (decl
) && DECL_COMDAT (decl
))
4157 /* Set it up again; we might have set DECL_INITIAL since the last
4159 comdat_linkage (decl
);
4162 /* Issue an error message if DECL is an uninitialized const variable. */
4165 check_for_uninitialized_const_var (tree decl
)
4167 tree type
= TREE_TYPE (decl
);
4169 /* ``Unless explicitly declared extern, a const object does not have
4170 external linkage and must be initialized. ($8.4; $12.1)'' ARM
4172 if (TREE_CODE (decl
) == VAR_DECL
4173 && TREE_CODE (type
) != REFERENCE_TYPE
4174 && CP_TYPE_CONST_P (type
)
4175 && !TYPE_NEEDS_CONSTRUCTING (type
)
4176 && !DECL_INITIAL (decl
))
4177 error ("uninitialized const %qD", decl
);
4180 /* FIELD is a FIELD_DECL or NULL. In the former case, the value
4181 returned is the next FIELD_DECL (possibly FIELD itself) that can be
4182 initialized. If there are no more such fields, the return value
4186 next_initializable_field (tree field
)
4189 && (TREE_CODE (field
) != FIELD_DECL
4190 || (DECL_C_BIT_FIELD (field
) && !DECL_NAME (field
))
4191 || DECL_ARTIFICIAL (field
)))
4192 field
= TREE_CHAIN (field
);
4197 /* Subroutine of reshape_init. Reshape the constructor for an array. INITP
4198 is the pointer to the old constructor list (to the CONSTRUCTOR_ELTS of
4199 the CONSTRUCTOR we are processing), while NEW_INIT is the CONSTRUCTOR we
4201 ELT_TYPE is the element type of the array. MAX_INDEX is an INTEGER_CST
4202 representing the size of the array minus one (the maximum index), or
4203 NULL_TREE if the array was declared without specifying the size. */
4206 reshape_init_array (tree elt_type
, tree max_index
,
4207 tree
*initp
, tree new_init
)
4209 bool sized_array_p
= (max_index
!= NULL_TREE
);
4210 HOST_WIDE_INT max_index_cst
= 0;
4211 HOST_WIDE_INT index
;
4214 /* HWI is either 32bit or 64bit, so it must be enough to represent the
4216 max_index_cst
= tree_low_cst (max_index
, 1);
4218 /* Loop until there are no more initializers. */
4220 *initp
&& (!sized_array_p
|| index
<= max_index_cst
);
4224 tree designated_index
;
4226 element_init
= reshape_init (elt_type
, initp
);
4227 if (element_init
== error_mark_node
)
4229 TREE_CHAIN (element_init
) = CONSTRUCTOR_ELTS (new_init
);
4230 CONSTRUCTOR_ELTS (new_init
) = element_init
;
4231 designated_index
= TREE_PURPOSE (element_init
);
4232 if (designated_index
)
4234 /* Handle array designated initializers (GNU extension). */
4235 if (TREE_CODE (designated_index
) == IDENTIFIER_NODE
)
4237 error ("name %qD used in a GNU-style designated "
4238 "initializer for an array", designated_index
);
4239 TREE_PURPOSE (element_init
) = NULL_TREE
;
4243 gcc_assert (TREE_CODE (designated_index
) == INTEGER_CST
);
4245 && tree_int_cst_lt (max_index
, designated_index
))
4247 error ("Designated initializer %qE larger than array "
4248 "size", designated_index
);
4249 TREE_PURPOSE (element_init
) = NULL_TREE
;
4252 index
= tree_low_cst (designated_index
, 1);
4260 /* Undo the brace-elision allowed by [dcl.init.aggr] in a
4261 brace-enclosed aggregate initializer.
4263 *INITP is one of a list of initializers describing a brace-enclosed
4264 initializer for an entity of the indicated aggregate TYPE. It may
4265 not presently match the shape of the TYPE; for example:
4267 struct S { int a; int b; };
4268 struct S a[] = { 1, 2, 3, 4 };
4270 Here *INITP will point to TREE_LIST of four elements, rather than a
4271 list of two elements, each itself a list of two elements. This
4272 routine transforms INIT from the former form into the latter. The
4273 revised initializer is returned. */
4276 reshape_init (tree type
, tree
*initp
)
4280 tree old_init_value
;
4282 bool brace_enclosed_p
;
4285 old_init_value
= (TREE_CODE (*initp
) == TREE_LIST
4286 ? TREE_VALUE (*initp
) : old_init
);
4288 gcc_assert (old_init_value
);
4290 /* If the initializer is brace-enclosed, pull initializers from the
4291 enclosed elements. Advance past the brace-enclosed initializer
4293 if (TREE_CODE (old_init_value
) == CONSTRUCTOR
4294 && BRACE_ENCLOSED_INITIALIZER_P (old_init_value
))
4296 *initp
= TREE_CHAIN (old_init
);
4297 TREE_CHAIN (old_init
) = NULL_TREE
;
4298 inits
= CONSTRUCTOR_ELTS (old_init_value
);
4300 brace_enclosed_p
= true;
4305 brace_enclosed_p
= false;
4308 /* A non-aggregate type is always initialized with a single
4310 if (!CP_AGGREGATE_TYPE_P (type
))
4312 *initp
= TREE_CHAIN (old_init
);
4313 TREE_CHAIN (old_init
) = NULL_TREE
;
4314 /* It is invalid to initialize a non-aggregate type with a
4315 brace-enclosed initializer. */
4316 if (brace_enclosed_p
)
4318 error ("brace-enclosed initializer used to initialize %qT",
4320 if (TREE_CODE (old_init
) == TREE_LIST
)
4321 TREE_VALUE (old_init
) = error_mark_node
;
4323 old_init
= error_mark_node
;
4331 All implicit type conversions (clause _conv_) are considered when
4332 initializing the aggregate member with an initializer from an
4333 initializer-list. If the initializer can initialize a member,
4334 the member is initialized. Otherwise, if the member is itself a
4335 non-empty subaggregate, brace elision is assumed and the
4336 initializer is considered for the initialization of the first
4337 member of the subaggregate. */
4338 if (!brace_enclosed_p
4339 && can_convert_arg (type
, TREE_TYPE (old_init_value
), old_init_value
))
4341 *initp
= TREE_CHAIN (old_init
);
4342 TREE_CHAIN (old_init
) = NULL_TREE
;
4346 if (TREE_CODE (old_init_value
) == STRING_CST
4347 && TREE_CODE (type
) == ARRAY_TYPE
4348 && char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (type
))))
4350 /* [dcl.init.string]
4352 A char array (whether plain char, signed char, or unsigned char)
4353 can be initialized by a string-literal (optionally enclosed in
4354 braces); a wchar_t array can be initialized by a wide
4355 string-literal (optionally enclosed in braces). */
4356 new_init
= old_init
;
4357 /* Move past the initializer. */
4358 *initp
= TREE_CHAIN (old_init
);
4359 TREE_CHAIN (old_init
) = NULL_TREE
;
4363 /* Build a CONSTRUCTOR to hold the contents of the aggregate. */
4364 new_init
= build_constructor (NULL_TREE
, NULL_TREE
);
4366 if (CLASS_TYPE_P (type
))
4370 field
= next_initializable_field (TYPE_FIELDS (type
));
4376 An initializer for an aggregate member that is an
4377 empty class shall have the form of an empty
4378 initializer-list {}. */
4379 if (!brace_enclosed_p
)
4381 error ("initializer for %qT must be brace-enclosed", type
);
4382 return error_mark_node
;
4387 /* Loop through the initializable fields, gathering
4393 /* Handle designated initializers, as an extension. */
4394 if (TREE_PURPOSE (*initp
))
4397 pedwarn ("ISO C++ does not allow designated initializers");
4398 field
= lookup_field_1 (type
, TREE_PURPOSE (*initp
),
4399 /*want_type=*/false);
4400 if (!field
|| TREE_CODE (field
) != FIELD_DECL
)
4401 error ("%qT has no non-static data member named %qD",
4402 type
, TREE_PURPOSE (*initp
));
4407 field_init
= reshape_init (TREE_TYPE (field
), initp
);
4408 if (field_init
== error_mark_node
)
4409 return error_mark_node
;
4410 TREE_CHAIN (field_init
) = CONSTRUCTOR_ELTS (new_init
);
4411 CONSTRUCTOR_ELTS (new_init
) = field_init
;
4414 When a union is initialized with a brace-enclosed
4415 initializer, the braces shall only contain an
4416 initializer for the first member of the union. */
4417 if (TREE_CODE (type
) == UNION_TYPE
)
4419 field
= next_initializable_field (TREE_CHAIN (field
));
4423 else if (TREE_CODE (type
) == ARRAY_TYPE
4424 || TREE_CODE (type
) == VECTOR_TYPE
)
4426 /* If the bound of the array is known, take no more initializers
4427 than are allowed. */
4428 tree max_index
= NULL_TREE
;
4429 if (TREE_CODE (type
) == ARRAY_TYPE
)
4431 if (TYPE_DOMAIN (type
))
4432 max_index
= array_type_nelts (type
);
4436 /* For a vector, the representation type is a struct
4437 containing a single member which is an array of the
4438 appropriate size. */
4439 tree rtype
= TYPE_DEBUG_REPRESENTATION_TYPE (type
);
4440 if (rtype
&& TYPE_DOMAIN (TREE_TYPE (TYPE_FIELDS (rtype
))))
4441 max_index
= array_type_nelts (TREE_TYPE (TYPE_FIELDS
4445 if (!reshape_init_array (TREE_TYPE (type
), max_index
,
4447 return error_mark_node
;
4452 /* The initializers were placed in reverse order in the
4454 CONSTRUCTOR_ELTS (new_init
) = nreverse (CONSTRUCTOR_ELTS (new_init
));
4456 if (TREE_CODE (old_init
) == TREE_LIST
)
4457 new_init
= build_tree_list (TREE_PURPOSE (old_init
), new_init
);
4460 /* If this was a brace-enclosed initializer and all of the
4461 initializers were not used up, there is a problem. */
4462 if (brace_enclosed_p
&& *initp
)
4463 error ("too many initializers for %qT", type
);
4468 /* Verify INIT (the initializer for DECL), and record the
4469 initialization in DECL_INITIAL, if appropriate. CLEANUP is as for
4470 grok_reference_init.
4472 If the return value is non-NULL, it is an expression that must be
4473 evaluated dynamically to initialize DECL. */
4476 check_initializer (tree decl
, tree init
, int flags
, tree
*cleanup
)
4478 tree type
= TREE_TYPE (decl
);
4479 tree init_code
= NULL
;
4481 /* If `start_decl' didn't like having an initialization, ignore it now. */
4482 if (init
!= NULL_TREE
&& DECL_INITIAL (decl
) == NULL_TREE
)
4485 /* If an initializer is present, DECL_INITIAL has been
4486 error_mark_node, to indicate that an as-of-yet unevaluated
4487 initialization will occur. From now on, DECL_INITIAL reflects
4488 the static initialization -- if any -- of DECL. */
4489 DECL_INITIAL (decl
) = NULL_TREE
;
4491 /* Things that are going to be initialized need to have complete
4493 TREE_TYPE (decl
) = type
= complete_type (TREE_TYPE (decl
));
4495 if (type
== error_mark_node
)
4496 /* We will have already complained. */
4498 else if (init
&& COMPLETE_TYPE_P (type
)
4499 && !TREE_CONSTANT (TYPE_SIZE (type
)))
4501 error ("variable-sized object %qD may not be initialized", decl
);
4504 else if (TREE_CODE (type
) == ARRAY_TYPE
4505 && !COMPLETE_TYPE_P (complete_type (TREE_TYPE (type
))))
4507 error ("elements of array %q#D have incomplete type", decl
);
4510 else if (TREE_CODE (type
) != ARRAY_TYPE
&& !COMPLETE_TYPE_P (type
))
4512 error ("%qD has incomplete type", decl
);
4513 TREE_TYPE (decl
) = error_mark_node
;
4517 if (TREE_CODE (decl
) == CONST_DECL
)
4519 gcc_assert (TREE_CODE (decl
) != REFERENCE_TYPE
);
4521 DECL_INITIAL (decl
) = init
;
4523 gcc_assert (init
!= NULL_TREE
);
4526 else if (!DECL_EXTERNAL (decl
) && TREE_CODE (type
) == REFERENCE_TYPE
)
4527 init
= grok_reference_init (decl
, type
, init
, cleanup
);
4530 if (TREE_CODE (init
) == CONSTRUCTOR
4531 && BRACE_ENCLOSED_INITIALIZER_P (init
))
4533 /* [dcl.init] paragraph 13,
4534 If T is a scalar type, then a declaration of the form
4539 reshape_init will complain about the extra braces,
4540 and doesn't do anything useful in the case where TYPE is
4541 scalar, so just don't call it. */
4542 if (CP_AGGREGATE_TYPE_P (type
))
4543 init
= reshape_init (type
, &init
);
4545 if ((*targetm
.vector_opaque_p
) (type
))
4547 error ("opaque vector types cannot be initialized");
4548 init
= error_mark_node
;
4552 /* If DECL has an array type without a specific bound, deduce the
4553 array size from the initializer. */
4554 maybe_deduce_size_from_array_init (decl
, init
);
4555 type
= TREE_TYPE (decl
);
4557 if (TYPE_HAS_CONSTRUCTOR (type
) || TYPE_NEEDS_CONSTRUCTING (type
))
4559 if (TREE_CODE (type
) == ARRAY_TYPE
)
4560 goto initialize_aggr
;
4561 else if (TREE_CODE (init
) == CONSTRUCTOR
4562 && BRACE_ENCLOSED_INITIALIZER_P (init
))
4564 if (TYPE_NON_AGGREGATE_CLASS (type
))
4566 error ("%qD must be initialized by constructor, "
4569 init
= error_mark_node
;
4572 goto dont_use_constructor
;
4576 int saved_stmts_are_full_exprs_p
;
4579 saved_stmts_are_full_exprs_p
= 0;
4580 if (building_stmt_tree ())
4582 saved_stmts_are_full_exprs_p
= stmts_are_full_exprs_p ();
4583 current_stmt_tree ()->stmts_are_full_exprs_p
= 1;
4585 init
= build_aggr_init (decl
, init
, flags
);
4586 if (building_stmt_tree ())
4587 current_stmt_tree ()->stmts_are_full_exprs_p
=
4588 saved_stmts_are_full_exprs_p
;
4594 dont_use_constructor
:
4595 if (TREE_CODE (init
) != TREE_VEC
)
4597 init_code
= store_init_value (decl
, init
);
4598 if (pedantic
&& TREE_CODE (type
) == ARRAY_TYPE
4599 && DECL_INITIAL (decl
)
4600 && TREE_CODE (DECL_INITIAL (decl
)) == STRING_CST
4601 && PAREN_STRING_LITERAL_P (DECL_INITIAL (decl
)))
4602 warning ("array %qD initialized by parenthesized string literal %qE",
4603 decl
, DECL_INITIAL (decl
));
4608 else if (DECL_EXTERNAL (decl
))
4610 else if (TYPE_P (type
) && TYPE_NEEDS_CONSTRUCTING (type
))
4611 goto initialize_aggr
;
4612 else if (IS_AGGR_TYPE (type
))
4614 tree core_type
= strip_array_types (type
);
4616 if (CLASSTYPE_READONLY_FIELDS_NEED_INIT (core_type
))
4617 error ("structure %qD with uninitialized const members", decl
);
4618 if (CLASSTYPE_REF_FIELDS_NEED_INIT (core_type
))
4619 error ("structure %qD with uninitialized reference members", decl
);
4621 check_for_uninitialized_const_var (decl
);
4624 check_for_uninitialized_const_var (decl
);
4626 if (init
&& init
!= error_mark_node
)
4627 init_code
= build2 (INIT_EXPR
, type
, decl
, init
);
4632 /* If DECL is not a local variable, give it RTL. */
4635 make_rtl_for_nonlocal_decl (tree decl
, tree init
, const char* asmspec
)
4637 int toplev
= toplevel_bindings_p ();
4640 /* Set the DECL_ASSEMBLER_NAME for the object. */
4643 /* The `register' keyword, when used together with an
4644 asm-specification, indicates that the variable should be
4645 placed in a particular register. */
4646 if (TREE_CODE (decl
) == VAR_DECL
&& DECL_REGISTER (decl
))
4648 change_decl_assembler_name (decl
, get_identifier (asmspec
));
4649 DECL_HARD_REGISTER (decl
) = 1;
4653 if (TREE_CODE (decl
) == FUNCTION_DECL
4654 && DECL_BUILT_IN_CLASS (decl
) == BUILT_IN_NORMAL
)
4655 set_builtin_user_assembler_name (decl
, asmspec
);
4656 set_user_assembler_name (decl
, asmspec
);
4660 /* Handle non-variables up front. */
4661 if (TREE_CODE (decl
) != VAR_DECL
)
4663 rest_of_decl_compilation (decl
, toplev
, at_eof
);
4667 /* If we see a class member here, it should be a static data
4669 if (DECL_LANG_SPECIFIC (decl
) && DECL_IN_AGGR_P (decl
))
4671 gcc_assert (TREE_STATIC (decl
));
4672 /* An in-class declaration of a static data member should be
4673 external; it is only a declaration, and not a definition. */
4674 if (init
== NULL_TREE
)
4675 gcc_assert (DECL_EXTERNAL (decl
));
4678 /* We don't create any RTL for local variables. */
4679 if (DECL_FUNCTION_SCOPE_P (decl
) && !TREE_STATIC (decl
))
4682 /* We defer emission of local statics until the corresponding
4683 DECL_EXPR is expanded. */
4684 defer_p
= DECL_FUNCTION_SCOPE_P (decl
) || DECL_VIRTUAL_P (decl
);
4686 /* We try to defer namespace-scope static constants so that they are
4687 not emitted into the object file unnecessarily. */
4688 if (!DECL_VIRTUAL_P (decl
)
4689 && TREE_READONLY (decl
)
4690 && DECL_INITIAL (decl
) != NULL_TREE
4691 && DECL_INITIAL (decl
) != error_mark_node
4692 && ! EMPTY_CONSTRUCTOR_P (DECL_INITIAL (decl
))
4694 && !TREE_PUBLIC (decl
))
4696 /* Fool with the linkage of static consts according to #pragma
4698 struct c_fileinfo
*finfo
= get_fileinfo (lbasename (input_filename
));
4699 if (!finfo
->interface_unknown
&& !TREE_PUBLIC (decl
))
4701 TREE_PUBLIC (decl
) = 1;
4702 DECL_EXTERNAL (decl
) = finfo
->interface_only
;
4707 /* Likewise for template instantiations. */
4708 else if (DECL_LANG_SPECIFIC (decl
)
4709 && DECL_IMPLICIT_INSTANTIATION (decl
))
4712 /* If we're not deferring, go ahead and assemble the variable. */
4714 rest_of_decl_compilation (decl
, toplev
, at_eof
);
4717 /* Generate code to initialize DECL (a local variable). */
4720 initialize_local_var (tree decl
, tree init
)
4722 tree type
= TREE_TYPE (decl
);
4725 gcc_assert (TREE_CODE (decl
) == VAR_DECL
4726 || TREE_CODE (decl
) == RESULT_DECL
);
4727 gcc_assert (!TREE_STATIC (decl
));
4729 if (DECL_SIZE (decl
) == NULL_TREE
)
4731 /* If we used it already as memory, it must stay in memory. */
4732 DECL_INITIAL (decl
) = NULL_TREE
;
4733 TREE_ADDRESSABLE (decl
) = TREE_USED (decl
);
4736 if (DECL_SIZE (decl
) && type
!= error_mark_node
)
4740 /* Compute and store the initial value. */
4741 already_used
= TREE_USED (decl
) || TREE_USED (type
);
4743 /* Perform the initialization. */
4746 int saved_stmts_are_full_exprs_p
;
4748 gcc_assert (building_stmt_tree ());
4749 saved_stmts_are_full_exprs_p
= stmts_are_full_exprs_p ();
4750 current_stmt_tree ()->stmts_are_full_exprs_p
= 1;
4751 finish_expr_stmt (init
);
4752 current_stmt_tree ()->stmts_are_full_exprs_p
=
4753 saved_stmts_are_full_exprs_p
;
4756 /* Set this to 0 so we can tell whether an aggregate which was
4757 initialized was ever used. Don't do this if it has a
4758 destructor, so we don't complain about the 'resource
4759 allocation is initialization' idiom. Now set
4760 attribute((unused)) on types so decls of that type will be
4761 marked used. (see TREE_USED, above.) */
4762 if (TYPE_NEEDS_CONSTRUCTING (type
)
4764 && TYPE_HAS_TRIVIAL_DESTRUCTOR (type
)
4765 && DECL_NAME (decl
))
4766 TREE_USED (decl
) = 0;
4767 else if (already_used
)
4768 TREE_USED (decl
) = 1;
4771 /* Generate a cleanup, if necessary. */
4772 cleanup
= cxx_maybe_build_cleanup (decl
);
4773 if (DECL_SIZE (decl
) && cleanup
)
4774 finish_decl_cleanup (decl
, cleanup
);
4777 /* DECL is a VAR_DECL for a compiler-generated variable with static
4778 storage duration (like a virtual table) whose initializer is a
4779 compile-time constant. Initialize the variable and provide it to
4783 initialize_artificial_var (tree decl
, tree init
)
4785 DECL_INITIAL (decl
) = build_constructor (NULL_TREE
, init
);
4786 DECL_INITIALIZED_P (decl
) = 1;
4787 determine_visibility (decl
);
4788 layout_var_decl (decl
);
4789 maybe_commonize_var (decl
);
4790 make_rtl_for_nonlocal_decl (decl
, init
, /*asmspec=*/NULL
);
4793 /* Finish processing of a declaration;
4794 install its line number and initial value.
4795 If the length of an array type is not known before,
4796 it must be determined now, from the initial value, or it is an error.
4798 INIT holds the value of an initializer that should be allowed to escape
4801 FLAGS is LOOKUP_ONLYCONVERTING if the = init syntax was used, else 0
4802 if the (init) syntax was used. */
4805 cp_finish_decl (tree decl
, tree init
, tree asmspec_tree
, int flags
)
4808 tree ttype
= NULL_TREE
;
4810 const char *asmspec
= NULL
;
4811 int was_readonly
= 0;
4812 bool var_definition_p
= false;
4814 if (decl
== error_mark_node
)
4819 error ("assignment (not initialization) in declaration");
4823 gcc_assert (TREE_CODE (decl
) != RESULT_DECL
);
4825 /* Assume no cleanup is required. */
4826 cleanup
= NULL_TREE
;
4828 /* If a name was specified, get the string. */
4829 if (global_scope_p (current_binding_level
))
4830 asmspec_tree
= maybe_apply_renaming_pragma (decl
, asmspec_tree
);
4832 asmspec
= TREE_STRING_POINTER (asmspec_tree
);
4834 if (init
&& TREE_CODE (init
) == NAMESPACE_DECL
)
4836 error ("cannot initialize %qD to namespace %qD", decl
, init
);
4840 if (current_class_type
4841 && CP_DECL_CONTEXT (decl
) == current_class_type
4842 && TYPE_BEING_DEFINED (current_class_type
)
4843 && (DECL_INITIAL (decl
) || init
))
4844 DECL_INITIALIZED_IN_CLASS_P (decl
) = 1;
4846 type
= TREE_TYPE (decl
);
4848 if (type
== error_mark_node
)
4851 if (TYPE_HAS_MUTABLE_P (type
))
4852 TREE_READONLY (decl
) = 0;
4854 if (processing_template_decl
)
4856 /* Add this declaration to the statement-tree. */
4857 if (at_function_scope_p ())
4858 add_decl_expr (decl
);
4860 if (init
&& DECL_INITIAL (decl
))
4861 DECL_INITIAL (decl
) = init
;
4862 if (TREE_CODE (decl
) == VAR_DECL
4863 && !DECL_PRETTY_FUNCTION_P (decl
)
4864 && !dependent_type_p (TREE_TYPE (decl
)))
4865 maybe_deduce_size_from_array_init (decl
, init
);
4870 /* Parameters are handled by store_parm_decls, not cp_finish_decl. */
4871 gcc_assert (TREE_CODE (decl
) != PARM_DECL
);
4873 /* Take care of TYPE_DECLs up front. */
4874 if (TREE_CODE (decl
) == TYPE_DECL
)
4876 if (type
!= error_mark_node
4877 && IS_AGGR_TYPE (type
) && DECL_NAME (decl
))
4879 if (TREE_TYPE (DECL_NAME (decl
)) && TREE_TYPE (decl
) != type
)
4880 warning ("shadowing previous type declaration of %q#D", decl
);
4881 set_identifier_type_value (DECL_NAME (decl
), decl
);
4884 /* If we have installed this as the canonical typedef for this
4885 type, and that type has not been defined yet, delay emitting
4886 the debug information for it, as we will emit it later. */
4887 if (TYPE_MAIN_DECL (TREE_TYPE (decl
)) == decl
4888 && !COMPLETE_TYPE_P (TREE_TYPE (decl
)))
4889 TYPE_DECL_SUPPRESS_DEBUG (decl
) = 1;
4891 rest_of_decl_compilation (decl
, DECL_CONTEXT (decl
) == NULL_TREE
,
4896 if (TREE_CODE (decl
) != FUNCTION_DECL
)
4897 ttype
= target_type (type
);
4900 /* Currently, GNU C++ puts constants in text space, making them
4901 impossible to initialize. In the future, one would hope for
4902 an operating system which understood the difference between
4903 initialization and the running of a program. */
4904 if (! DECL_EXTERNAL (decl
) && TREE_READONLY (decl
))
4907 if (TYPE_NEEDS_CONSTRUCTING (type
)
4908 || TREE_CODE (type
) == REFERENCE_TYPE
)
4909 TREE_READONLY (decl
) = 0;
4912 if (TREE_CODE (decl
) == VAR_DECL
)
4914 /* Only PODs can have thread-local storage. Other types may require
4915 various kinds of non-trivial initialization. */
4916 if (DECL_THREAD_LOCAL (decl
) && !pod_type_p (TREE_TYPE (decl
)))
4917 error ("%qD cannot be thread-local because it has non-POD type %qT",
4918 decl
, TREE_TYPE (decl
));
4919 /* Convert the initializer to the type of DECL, if we have not
4920 already initialized DECL. */
4921 if (!DECL_INITIALIZED_P (decl
)
4922 /* If !DECL_EXTERNAL then DECL is being defined. In the
4923 case of a static data member initialized inside the
4924 class-specifier, there can be an initializer even if DECL
4925 is *not* defined. */
4926 && (!DECL_EXTERNAL (decl
) || init
))
4928 init
= check_initializer (decl
, init
, flags
, &cleanup
);
4929 /* Thread-local storage cannot be dynamically initialized. */
4930 if (DECL_THREAD_LOCAL (decl
) && init
)
4932 error ("%qD is thread-local and so cannot be dynamically "
4933 "initialized", decl
);
4940 The memory occupied by any object of static storage
4941 duration is zero-initialized at program startup before
4942 any other initialization takes place.
4944 We cannot create an appropriate initializer until after
4945 the type of DECL is finalized. If DECL_INITIAL is set,
4946 then the DECL is statically initialized, and any
4947 necessary zero-initialization has already been performed. */
4948 if (TREE_STATIC (decl
) && !DECL_INITIAL (decl
))
4949 DECL_INITIAL (decl
) = build_zero_init (TREE_TYPE (decl
),
4950 /*nelts=*/NULL_TREE
,
4951 /*static_storage_p=*/true);
4952 /* Remember that the initialization for this variable has
4954 DECL_INITIALIZED_P (decl
) = 1;
4955 /* This declaration is the definition of this variable,
4956 unless we are initializing a static data member within
4957 the class specifier. */
4958 if (!DECL_EXTERNAL (decl
))
4959 var_definition_p
= true;
4960 /* The variable is being defined, so determine its
4962 determine_visibility (decl
);
4964 /* If the variable has an array type, lay out the type, even if
4965 there is no initializer. It is valid to index through the
4966 array, and we must get TYPE_ALIGN set correctly on the array
4968 else if (TREE_CODE (type
) == ARRAY_TYPE
)
4972 /* Add this declaration to the statement-tree. This needs to happen
4973 after the call to check_initializer so that the DECL_EXPR for a
4974 reference temp is added before the DECL_EXPR for the reference itself. */
4975 if (at_function_scope_p ())
4976 add_decl_expr (decl
);
4978 if (TREE_CODE (decl
) == VAR_DECL
)
4979 layout_var_decl (decl
);
4981 /* Output the assembler code and/or RTL code for variables and functions,
4982 unless the type is an undefined structure or union.
4983 If not, it will get done when the type is completed. */
4984 if (TREE_CODE (decl
) == VAR_DECL
|| TREE_CODE (decl
) == FUNCTION_DECL
)
4986 if (TREE_CODE (decl
) == VAR_DECL
)
4987 maybe_commonize_var (decl
);
4989 make_rtl_for_nonlocal_decl (decl
, init
, asmspec
);
4991 /* Check for abstractness of the type. Notice that there is no
4992 need to strip array types here since the check for those types
4993 is already done within create_array_type_for_decl. */
4994 if (TREE_CODE (type
) == FUNCTION_TYPE
4995 || TREE_CODE (type
) == METHOD_TYPE
)
4996 abstract_virtuals_error (decl
, TREE_TYPE (type
));
4998 abstract_virtuals_error (decl
, type
);
5000 if (TREE_CODE (decl
) == FUNCTION_DECL
5001 || TREE_TYPE (decl
) == error_mark_node
)
5002 /* No initialization required. */
5004 else if (DECL_EXTERNAL (decl
)
5005 && ! (DECL_LANG_SPECIFIC (decl
)
5006 && DECL_NOT_REALLY_EXTERN (decl
)))
5009 DECL_INITIAL (decl
) = init
;
5013 /* A variable definition. */
5014 if (DECL_FUNCTION_SCOPE_P (decl
))
5016 /* Initialize the local variable. */
5017 if (processing_template_decl
)
5019 if (init
|| DECL_INITIAL (decl
) == error_mark_node
)
5020 DECL_INITIAL (decl
) = init
;
5022 else if (!TREE_STATIC (decl
))
5023 initialize_local_var (decl
, init
);
5026 /* If a variable is defined, and then a subsequent
5027 definition with external linkage is encountered, we will
5028 get here twice for the same variable. We want to avoid
5029 calling expand_static_init more than once. For variables
5030 that are not static data members, we can call
5031 expand_static_init only when we actually process the
5032 initializer. It is not legal to redeclare a static data
5033 member, so this issue does not arise in that case. */
5034 if (var_definition_p
&& TREE_STATIC (decl
))
5035 expand_static_init (decl
, init
);
5039 /* If a CLEANUP_STMT was created to destroy a temporary bound to a
5040 reference, insert it in the statement-tree now. */
5042 push_cleanup (decl
, cleanup
, false);
5047 TREE_READONLY (decl
) = 1;
5049 /* If this was marked 'used', be sure it will be output. */
5050 if (lookup_attribute ("used", DECL_ATTRIBUTES (decl
)))
5051 mark_decl_referenced (decl
);
5054 /* This is here for a midend callback from c-common.c. */
5057 finish_decl (tree decl
, tree init
, tree asmspec_tree
)
5059 cp_finish_decl (decl
, init
, asmspec_tree
, 0);
5062 /* Returns a declaration for a VAR_DECL as if:
5064 extern "C" TYPE NAME;
5066 had been seen. Used to create compiler-generated global
5070 declare_global_var (tree name
, tree type
)
5074 push_to_top_level ();
5075 decl
= build_decl (VAR_DECL
, name
, type
);
5076 TREE_PUBLIC (decl
) = 1;
5077 DECL_EXTERNAL (decl
) = 1;
5078 DECL_ARTIFICIAL (decl
) = 1;
5079 /* If the user has explicitly declared this variable (perhaps
5080 because the code we are compiling is part of a low-level runtime
5081 library), then it is possible that our declaration will be merged
5082 with theirs by pushdecl. */
5083 decl
= pushdecl (decl
);
5084 cp_finish_decl (decl
, NULL_TREE
, NULL_TREE
, 0);
5085 pop_from_top_level ();
5090 /* Returns a pointer to the `atexit' function. Note that if
5091 FLAG_USE_CXA_ATEXIT is nonzero, then this will actually be the new
5092 `__cxa_atexit' function specified in the IA64 C++ ABI. */
5095 get_atexit_node (void)
5106 if (flag_use_cxa_atexit
)
5108 /* The declaration for `__cxa_atexit' is:
5110 int __cxa_atexit (void (*)(void *), void *, void *)
5112 We build up the argument types and then then function type
5115 /* First, build the pointer-to-function type for the first
5117 arg_types
= tree_cons (NULL_TREE
, ptr_type_node
, void_list_node
);
5118 fn_type
= build_function_type (void_type_node
, arg_types
);
5119 fn_ptr_type
= build_pointer_type (fn_type
);
5120 /* Then, build the rest of the argument types. */
5121 arg_types
= tree_cons (NULL_TREE
, ptr_type_node
, void_list_node
);
5122 arg_types
= tree_cons (NULL_TREE
, ptr_type_node
, arg_types
);
5123 arg_types
= tree_cons (NULL_TREE
, fn_ptr_type
, arg_types
);
5124 /* And the final __cxa_atexit type. */
5125 fn_type
= build_function_type (integer_type_node
, arg_types
);
5126 fn_ptr_type
= build_pointer_type (fn_type
);
5127 name
= "__cxa_atexit";
5131 /* The declaration for `atexit' is:
5133 int atexit (void (*)());
5135 We build up the argument types and then then function type
5137 fn_type
= build_function_type (void_type_node
, void_list_node
);
5138 fn_ptr_type
= build_pointer_type (fn_type
);
5139 arg_types
= tree_cons (NULL_TREE
, fn_ptr_type
, void_list_node
);
5140 /* Build the final atexit type. */
5141 fn_type
= build_function_type (integer_type_node
, arg_types
);
5145 /* Now, build the function declaration. */
5146 push_lang_context (lang_name_c
);
5147 atexit_fndecl
= build_library_fn_ptr (name
, fn_type
);
5148 mark_used (atexit_fndecl
);
5149 pop_lang_context ();
5150 atexit_node
= decay_conversion (atexit_fndecl
);
5155 /* Returns the __dso_handle VAR_DECL. */
5158 get_dso_handle_node (void)
5160 if (dso_handle_node
)
5161 return dso_handle_node
;
5163 /* Declare the variable. */
5164 dso_handle_node
= declare_global_var (get_identifier ("__dso_handle"),
5167 return dso_handle_node
;
5170 /* Begin a new function with internal linkage whose job will be simply
5171 to destroy some particular variable. */
5173 static GTY(()) int start_cleanup_cnt
;
5176 start_cleanup_fn (void)
5183 push_to_top_level ();
5185 /* No need to mangle this. */
5186 push_lang_context (lang_name_c
);
5188 /* Build the parameter-types. */
5189 parmtypes
= void_list_node
;
5190 /* Functions passed to __cxa_atexit take an additional parameter.
5191 We'll just ignore it. After we implement the new calling
5192 convention for destructors, we can eliminate the use of
5193 additional cleanup functions entirely in the -fnew-abi case. */
5194 if (flag_use_cxa_atexit
)
5195 parmtypes
= tree_cons (NULL_TREE
, ptr_type_node
, parmtypes
);
5196 /* Build the function type itself. */
5197 fntype
= build_function_type (void_type_node
, parmtypes
);
5198 /* Build the name of the function. */
5199 sprintf (name
, "__tcf_%d", start_cleanup_cnt
++);
5200 /* Build the function declaration. */
5201 fndecl
= build_lang_decl (FUNCTION_DECL
, get_identifier (name
), fntype
);
5202 /* It's a function with internal linkage, generated by the
5204 TREE_PUBLIC (fndecl
) = 0;
5205 DECL_ARTIFICIAL (fndecl
) = 1;
5206 /* Make the function `inline' so that it is only emitted if it is
5207 actually needed. It is unlikely that it will be inlined, since
5208 it is only called via a function pointer, but we avoid unnecessary
5209 emissions this way. */
5210 DECL_INLINE (fndecl
) = 1;
5211 DECL_DECLARED_INLINE_P (fndecl
) = 1;
5212 DECL_INTERFACE_KNOWN (fndecl
) = 1;
5213 /* Build the parameter. */
5214 if (flag_use_cxa_atexit
)
5218 parmdecl
= cp_build_parm_decl (NULL_TREE
, ptr_type_node
);
5219 DECL_CONTEXT (parmdecl
) = fndecl
;
5220 TREE_USED (parmdecl
) = 1;
5221 DECL_ARGUMENTS (fndecl
) = parmdecl
;
5225 start_preparsed_function (fndecl
, NULL_TREE
, SF_PRE_PARSED
);
5227 pop_lang_context ();
5229 return current_function_decl
;
5232 /* Finish the cleanup function begun by start_cleanup_fn. */
5235 end_cleanup_fn (void)
5237 expand_or_defer_fn (finish_function (0));
5239 pop_from_top_level ();
5242 /* Generate code to handle the destruction of DECL, an object with
5243 static storage duration. */
5246 register_dtor_fn (tree decl
)
5253 if (TYPE_HAS_TRIVIAL_DESTRUCTOR (TREE_TYPE (decl
)))
5254 return void_zero_node
;
5256 /* Call build_cleanup before we enter the anonymous function so that
5257 any access checks will be done relative to the current scope,
5258 rather than the scope of the anonymous function. */
5259 build_cleanup (decl
);
5261 /* Now start the function. */
5262 cleanup
= start_cleanup_fn ();
5264 /* Now, recompute the cleanup. It may contain SAVE_EXPRs that refer
5265 to the original function, rather than the anonymous one. That
5266 will make the back-end think that nested functions are in use,
5267 which causes confusion. */
5269 push_deferring_access_checks (dk_no_check
);
5270 fcall
= build_cleanup (decl
);
5271 pop_deferring_access_checks ();
5273 /* Create the body of the anonymous function. */
5274 compound_stmt
= begin_compound_stmt (BCS_FN_BODY
);
5275 finish_expr_stmt (fcall
);
5276 finish_compound_stmt (compound_stmt
);
5279 /* Call atexit with the cleanup function. */
5280 cxx_mark_addressable (cleanup
);
5281 mark_used (cleanup
);
5282 cleanup
= build_unary_op (ADDR_EXPR
, cleanup
, 0);
5283 if (flag_use_cxa_atexit
)
5285 args
= tree_cons (NULL_TREE
,
5286 build_unary_op (ADDR_EXPR
, get_dso_handle_node (), 0),
5288 args
= tree_cons (NULL_TREE
, null_pointer_node
, args
);
5289 args
= tree_cons (NULL_TREE
, cleanup
, args
);
5292 args
= tree_cons (NULL_TREE
, cleanup
, NULL_TREE
);
5293 return build_function_call (get_atexit_node (), args
);
5296 /* DECL is a VAR_DECL with static storage duration. INIT, if present,
5297 is its initializer. Generate code to handle the construction
5298 and destruction of DECL. */
5301 expand_static_init (tree decl
, tree init
)
5303 gcc_assert (TREE_CODE (decl
) == VAR_DECL
);
5304 gcc_assert (TREE_STATIC (decl
));
5306 /* Some variables require no initialization. */
5308 && !TYPE_NEEDS_CONSTRUCTING (TREE_TYPE (decl
))
5309 && TYPE_HAS_TRIVIAL_DESTRUCTOR (TREE_TYPE (decl
)))
5312 if (DECL_FUNCTION_SCOPE_P (decl
))
5314 /* Emit code to perform this initialization but once. */
5315 tree if_stmt
, inner_if_stmt
= NULL_TREE
;
5316 tree then_clause
, inner_then_clause
= NULL_TREE
;
5317 tree guard
, guard_addr
, guard_addr_list
;
5318 tree acquire_fn
, release_fn
, abort_fn
;
5321 /* Emit code to perform this initialization but once. This code
5324 static <type> guard;
5325 if (!guard.first_byte) {
5326 if (__cxa_guard_acquire (&guard)) {
5329 // Do initialization.
5330 flag = true; __cxa_guard_release (&guard);
5331 // Register variable for destruction at end of program.
5333 if (!flag) __cxa_guard_abort (&guard);
5337 Note that the `flag' variable is only set to 1 *after* the
5338 initialization is complete. This ensures that an exception,
5339 thrown during the construction, will cause the variable to
5340 reinitialized when we pass through this code again, as per:
5344 If the initialization exits by throwing an exception, the
5345 initialization is not complete, so it will be tried again
5346 the next time control enters the declaration.
5348 This process should be thread-safe, too; multiple threads
5349 should not be able to initialize the variable more than
5352 /* Create the guard variable. */
5353 guard
= get_guard (decl
);
5355 /* Begin the conditional initialization. */
5356 if_stmt
= begin_if_stmt ();
5357 finish_if_stmt_cond (get_guard_cond (guard
), if_stmt
);
5358 then_clause
= begin_compound_stmt (BCS_NO_SCOPE
);
5360 if (flag_threadsafe_statics
)
5362 guard_addr
= build_address (guard
);
5363 guard_addr_list
= build_tree_list (NULL_TREE
, guard_addr
);
5365 acquire_fn
= get_identifier ("__cxa_guard_acquire");
5366 release_fn
= get_identifier ("__cxa_guard_release");
5367 abort_fn
= get_identifier ("__cxa_guard_abort");
5368 if (!get_global_value_if_present (acquire_fn
, &acquire_fn
))
5370 tree argtypes
= tree_cons (NULL_TREE
, TREE_TYPE (guard_addr
),
5372 tree vfntype
= build_function_type (void_type_node
, argtypes
);
5373 acquire_fn
= push_library_fn
5374 (acquire_fn
, build_function_type (integer_type_node
, argtypes
));
5375 release_fn
= push_library_fn (release_fn
, vfntype
);
5376 abort_fn
= push_library_fn (abort_fn
, vfntype
);
5380 release_fn
= identifier_global_value (release_fn
);
5381 abort_fn
= identifier_global_value (abort_fn
);
5384 inner_if_stmt
= begin_if_stmt ();
5385 finish_if_stmt_cond (build_call (acquire_fn
, guard_addr_list
),
5388 inner_then_clause
= begin_compound_stmt (BCS_NO_SCOPE
);
5389 begin
= get_target_expr (boolean_false_node
);
5390 flag
= TARGET_EXPR_SLOT (begin
);
5392 TARGET_EXPR_CLEANUP (begin
)
5393 = build (COND_EXPR
, void_type_node
, flag
,
5395 build_call (abort_fn
, guard_addr_list
));
5396 CLEANUP_EH_ONLY (begin
) = 1;
5398 /* Do the initialization itself. */
5399 init
= add_stmt_to_compound (begin
, init
);
5400 init
= add_stmt_to_compound
5401 (init
, build (MODIFY_EXPR
, void_type_node
, flag
, boolean_true_node
));
5402 init
= add_stmt_to_compound
5403 (init
, build_call (release_fn
, guard_addr_list
));
5406 init
= add_stmt_to_compound (init
, set_guard (guard
));
5408 /* Use atexit to register a function for destroying this static
5410 init
= add_stmt_to_compound (init
, register_dtor_fn (decl
));
5412 finish_expr_stmt (init
);
5414 if (flag_threadsafe_statics
)
5416 finish_compound_stmt (inner_then_clause
);
5417 finish_then_clause (inner_if_stmt
);
5418 finish_if_stmt (inner_if_stmt
);
5421 finish_compound_stmt (then_clause
);
5422 finish_then_clause (if_stmt
);
5423 finish_if_stmt (if_stmt
);
5426 static_aggregates
= tree_cons (init
, decl
, static_aggregates
);
5430 /* Make TYPE a complete type based on INITIAL_VALUE.
5431 Return 0 if successful, 1 if INITIAL_VALUE can't be deciphered,
5432 2 if there was no information (in which case assume 0 if DO_DEFAULT). */
5435 complete_array_type (tree type
, tree initial_value
, int do_default
)
5437 tree maxindex
= NULL_TREE
;
5442 /* An array of character type can be initialized from a
5443 brace-enclosed string constant. */
5444 if (char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (type
)))
5445 && TREE_CODE (initial_value
) == CONSTRUCTOR
5446 && CONSTRUCTOR_ELTS (initial_value
)
5447 && (TREE_CODE (TREE_VALUE (CONSTRUCTOR_ELTS (initial_value
)))
5449 && TREE_CHAIN (CONSTRUCTOR_ELTS (initial_value
)) == NULL_TREE
)
5450 initial_value
= TREE_VALUE (CONSTRUCTOR_ELTS (initial_value
));
5452 /* Note MAXINDEX is really the maximum index, one less than the
5454 if (TREE_CODE (initial_value
) == STRING_CST
)
5457 = int_size_in_bytes (TREE_TYPE (TREE_TYPE (initial_value
)));
5458 maxindex
= build_int_cst (NULL_TREE
,
5459 (TREE_STRING_LENGTH (initial_value
)
5462 else if (TREE_CODE (initial_value
) == CONSTRUCTOR
)
5464 tree elts
= CONSTRUCTOR_ELTS (initial_value
);
5466 maxindex
= ssize_int (-1);
5467 for (; elts
; elts
= TREE_CHAIN (elts
))
5469 if (TREE_PURPOSE (elts
))
5470 maxindex
= TREE_PURPOSE (elts
);
5472 maxindex
= size_binop (PLUS_EXPR
, maxindex
, ssize_int (1));
5477 /* Make an error message unless that happened already. */
5478 if (initial_value
!= error_mark_node
)
5481 initial_value
= NULL_TREE
;
5483 /* Prevent further error messages. */
5484 maxindex
= build_int_cst (NULL_TREE
, 0);
5491 maxindex
= build_int_cst (NULL_TREE
, 0);
5501 domain
= build_index_type (maxindex
);
5502 TYPE_DOMAIN (type
) = domain
;
5505 itype
= TREE_TYPE (initial_value
);
5508 if (itype
&& !TYPE_DOMAIN (itype
))
5509 TYPE_DOMAIN (itype
) = domain
;
5510 /* The type of the main variant should never be used for arrays
5511 of different sizes. It should only ever be completed with the
5512 size of the array. */
5513 if (! TYPE_DOMAIN (TYPE_MAIN_VARIANT (type
)))
5514 TYPE_DOMAIN (TYPE_MAIN_VARIANT (type
)) = domain
;
5516 elt_type
= TREE_TYPE (type
);
5517 TYPE_NEEDS_CONSTRUCTING (type
)
5518 = TYPE_NEEDS_CONSTRUCTING (TYPE_MAIN_VARIANT (elt_type
));
5519 TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type
)
5520 = TYPE_HAS_NONTRIVIAL_DESTRUCTOR (TYPE_MAIN_VARIANT (elt_type
));
5523 /* Lay out the type now that we can get the real answer. */
5530 /* Return zero if something is declared to be a member of type
5531 CTYPE when in the context of CUR_TYPE. STRING is the error
5532 message to print in that case. Otherwise, quietly return 1. */
5535 member_function_or_else (tree ctype
, tree cur_type
, enum overload_flags flags
)
5537 if (ctype
&& ctype
!= cur_type
)
5539 if (flags
== DTOR_FLAG
)
5540 error ("destructor for alien class %qT cannot be a member", ctype
);
5542 error ("constructor for alien class %qT cannot be a member", ctype
);
5548 /* Subroutine of `grokdeclarator'. */
5550 /* Generate errors possibly applicable for a given set of specifiers.
5551 This is for ARM $7.1.2. */
5554 bad_specifiers (tree object
,
5563 error ("%qD declared as a %<virtual%> %s", object
, type
);
5565 error ("%qD declared as an %<inline%> %s", object
, type
);
5567 error ("%<const%> and %<volatile%> function specifiers on "
5568 "%qD invalid in %s declaration",
5571 cp_error_at ("%qD declared as a friend", object
);
5573 && (TREE_CODE (object
) == TYPE_DECL
5574 || (!TYPE_PTRFN_P (TREE_TYPE (object
))
5575 && !TYPE_REFFN_P (TREE_TYPE (object
))
5576 && !TYPE_PTRMEMFUNC_P (TREE_TYPE (object
)))))
5577 cp_error_at ("%qD declared with an exception specification", object
);
5580 /* CTYPE is class type, or null if non-class.
5581 TYPE is type this FUNCTION_DECL should have, either FUNCTION_TYPE
5583 DECLARATOR is the function's name.
5584 PARMS is a chain of PARM_DECLs for the function.
5585 VIRTUALP is truthvalue of whether the function is virtual or not.
5586 FLAGS are to be passed through to `grokclassfn'.
5587 QUALS are qualifiers indicating whether the function is `const'
5589 RAISES is a list of exceptions that this function can raise.
5590 CHECK is 1 if we must find this method in CTYPE, 0 if we should
5591 not look, and -1 if we should not call `grokclassfn' at all.
5593 Returns `NULL_TREE' if something goes wrong, after issuing
5594 applicable error messages. */
5597 grokfndecl (tree ctype
,
5601 tree orig_declarator
,
5603 enum overload_flags flags
,
5616 int staticp
= ctype
&& TREE_CODE (type
) == FUNCTION_TYPE
;
5617 int has_default_arg
= 0;
5621 type
= build_exception_variant (type
, raises
);
5623 decl
= build_lang_decl (FUNCTION_DECL
, declarator
, type
);
5624 DECL_ARGUMENTS (decl
) = parms
;
5625 /* Propagate volatile out from type to decl. */
5626 if (TYPE_VOLATILE (type
))
5627 TREE_THIS_VOLATILE (decl
) = 1;
5629 /* If this decl has namespace scope, set that up. */
5631 set_decl_namespace (decl
, in_namespace
, friendp
);
5633 DECL_CONTEXT (decl
) = FROB_CONTEXT (current_namespace
);
5635 /* `main' and builtins have implicit 'C' linkage. */
5636 if ((MAIN_NAME_P (declarator
)
5637 || (IDENTIFIER_LENGTH (declarator
) > 10
5638 && IDENTIFIER_POINTER (declarator
)[0] == '_'
5639 && IDENTIFIER_POINTER (declarator
)[1] == '_'
5640 && strncmp (IDENTIFIER_POINTER (declarator
)+2, "builtin_", 8) == 0))
5641 && current_lang_name
== lang_name_cplusplus
5642 && ctype
== NULL_TREE
5643 /* NULL_TREE means global namespace. */
5644 && DECL_CONTEXT (decl
) == NULL_TREE
)
5645 SET_DECL_LANGUAGE (decl
, lang_c
);
5647 /* Should probably propagate const out from type to decl I bet (mrs). */
5650 DECL_STATIC_FUNCTION_P (decl
) = 1;
5651 DECL_CONTEXT (decl
) = ctype
;
5655 DECL_CONTEXT (decl
) = ctype
;
5657 if (ctype
== NULL_TREE
&& DECL_MAIN_P (decl
))
5659 if (processing_template_decl
)
5660 error ("cannot declare %<::main%> to be a template");
5662 error ("cannot declare %<::main%> to be inline");
5664 error ("cannot declare %<::main%> to be static");
5665 if (!same_type_p (TREE_TYPE (TREE_TYPE (decl
)),
5668 error ("%<::main%> must return %<int%>");
5669 TREE_TYPE (TREE_TYPE (decl
)) = integer_type_node
;
5675 /* Members of anonymous types and local classes have no linkage; make
5676 them internal. If a typedef is made later, this will be changed. */
5677 if (ctype
&& (TYPE_ANONYMOUS_P (ctype
)
5678 || decl_function_context (TYPE_MAIN_DECL (ctype
))))
5683 /* [basic.link]: A name with no linkage (notably, the name of a class
5684 or enumeration declared in a local scope) shall not be used to
5685 declare an entity with linkage.
5687 Only check this for public decls for now. See core 319, 389. */
5688 t
= no_linkage_check (TREE_TYPE (decl
),
5689 /*relaxed_p=*/false);
5692 if (TYPE_ANONYMOUS_P (t
))
5694 if (DECL_EXTERN_C_P (decl
))
5695 /* Allow this; it's pretty common in C. */;
5698 pedwarn ("non-local function %q#D uses anonymous type",
5700 if (DECL_ORIGINAL_TYPE (TYPE_NAME (t
)))
5701 cp_pedwarn_at ("%q#D does not refer to the unqualified "
5702 "type, so it is not used for linkage",
5707 pedwarn ("non-local function %q#D uses local type %qT", decl
, t
);
5711 TREE_PUBLIC (decl
) = publicp
;
5714 DECL_INTERFACE_KNOWN (decl
) = 1;
5715 DECL_NOT_REALLY_EXTERN (decl
) = 1;
5718 /* If the declaration was declared inline, mark it as such. */
5720 DECL_DECLARED_INLINE_P (decl
) = 1;
5721 /* We inline functions that are explicitly declared inline, or, when
5722 the user explicitly asks us to, all functions. */
5723 if (DECL_DECLARED_INLINE_P (decl
)
5724 || (flag_inline_trees
== 2 && !DECL_INLINE (decl
) && funcdef_flag
))
5725 DECL_INLINE (decl
) = 1;
5727 DECL_EXTERNAL (decl
) = 1;
5728 if (quals
&& TREE_CODE (type
) == FUNCTION_TYPE
)
5730 error ("%smember function %qD cannot have cv-qualifier",
5731 (ctype
? "static " : "non-"), decl
);
5732 quals
= TYPE_UNQUALIFIED
;
5735 if (IDENTIFIER_OPNAME_P (DECL_NAME (decl
)))
5736 grok_op_properties (decl
, friendp
, /*complain=*/true);
5738 if (ctype
&& decl_function_context (decl
))
5739 DECL_NO_STATIC_CHAIN (decl
) = 1;
5741 for (t
= TYPE_ARG_TYPES (TREE_TYPE (decl
)); t
; t
= TREE_CHAIN (t
))
5742 if (TREE_PURPOSE (t
)
5743 && TREE_CODE (TREE_PURPOSE (t
)) == DEFAULT_ARG
)
5745 has_default_arg
= 1;
5750 && TREE_CODE (orig_declarator
) == TEMPLATE_ID_EXPR
)
5754 ("defining explicit specialization %qD in friend declaration",
5758 tree fns
= TREE_OPERAND (orig_declarator
, 0);
5759 tree args
= TREE_OPERAND (orig_declarator
, 1);
5761 if (PROCESSING_REAL_TEMPLATE_DECL_P ())
5763 /* Something like `template <class T> friend void f<T>()'. */
5764 error ("invalid use of template-id %qD in declaration "
5765 "of primary template",
5771 /* A friend declaration of the form friend void f<>(). Record
5772 the information in the TEMPLATE_ID_EXPR. */
5773 SET_DECL_IMPLICIT_INSTANTIATION (decl
);
5775 if (TREE_CODE (fns
) == COMPONENT_REF
)
5777 /* Due to bison parser ickiness, we will have already looked
5778 up an operator_name or PFUNCNAME within the current class
5779 (see template_id in parse.y). If the current class contains
5780 such a name, we'll get a COMPONENT_REF here. Undo that. */
5782 gcc_assert (TREE_TYPE (TREE_OPERAND (fns
, 0))
5783 == current_class_type
);
5784 fns
= TREE_OPERAND (fns
, 1);
5786 gcc_assert (TREE_CODE (fns
) == IDENTIFIER_NODE
5787 || TREE_CODE (fns
) == OVERLOAD
);
5788 DECL_TEMPLATE_INFO (decl
) = tree_cons (fns
, args
, NULL_TREE
);
5790 if (has_default_arg
)
5792 error ("default arguments are not allowed in declaration "
5793 "of friend template specialization %qD",
5800 error ("%<inline%> is not allowed in declaration of friend "
5801 "template specialization %qD",
5809 /* Make the init_value nonzero so pushdecl knows this is not
5810 tentative. error_mark_node is replaced later with the BLOCK. */
5811 DECL_INITIAL (decl
) = error_mark_node
;
5813 if (TYPE_NOTHROW_P (type
) || nothrow_libfn_p (decl
))
5814 TREE_NOTHROW (decl
) = 1;
5816 /* Caller will do the rest of this. */
5820 if (flags
== NO_SPECIAL
&& ctype
&& constructor_name_p (declarator
, ctype
))
5821 DECL_CONSTRUCTOR_P (decl
) = 1;
5823 /* Function gets the ugly name, field gets the nice one. This call
5824 may change the type of the function (because of default
5826 if (ctype
!= NULL_TREE
)
5827 grokclassfn (ctype
, decl
, flags
, quals
);
5829 decl
= check_explicit_specialization (orig_declarator
, decl
,
5831 2 * (funcdef_flag
!= 0) +
5832 4 * (friendp
!= 0));
5833 if (decl
== error_mark_node
)
5838 cplus_decl_attributes (&decl
, *attrlist
, 0);
5839 *attrlist
= NULL_TREE
;
5842 if (ctype
!= NULL_TREE
5843 && (! TYPE_FOR_JAVA (ctype
) || check_java_method (decl
))
5848 old_decl
= check_classfn (ctype
, decl
,
5849 (processing_template_decl
5850 > template_class_depth (ctype
))
5851 ? current_template_parms
5854 if (old_decl
&& TREE_CODE (old_decl
) == TEMPLATE_DECL
)
5855 /* Because grokfndecl is always supposed to return a
5856 FUNCTION_DECL, we pull out the DECL_TEMPLATE_RESULT
5857 here. We depend on our callers to figure out that its
5858 really a template that's being returned. */
5859 old_decl
= DECL_TEMPLATE_RESULT (old_decl
);
5861 if (old_decl
&& DECL_STATIC_FUNCTION_P (old_decl
)
5862 && TREE_CODE (TREE_TYPE (decl
)) == METHOD_TYPE
)
5863 /* Remove the `this' parm added by grokclassfn.
5864 XXX Isn't this done in start_function, too? */
5865 revert_static_member_fn (decl
);
5866 if (old_decl
&& DECL_ARTIFICIAL (old_decl
))
5867 error ("definition of implicitly-declared %qD", old_decl
);
5874 /* Since we've smashed OLD_DECL to its
5875 DECL_TEMPLATE_RESULT, we must do the same to DECL. */
5876 if (TREE_CODE (decl
) == TEMPLATE_DECL
)
5877 decl
= DECL_TEMPLATE_RESULT (decl
);
5879 /* Attempt to merge the declarations. This can fail, in
5880 the case of some invalid specialization declarations. */
5881 pop_p
= push_scope (ctype
);
5882 ok
= duplicate_decls (decl
, old_decl
);
5887 error ("no %q#D member function declared in class %qT",
5895 if (DECL_CONSTRUCTOR_P (decl
) && !grok_ctor_properties (ctype
, decl
))
5898 if (ctype
== NULL_TREE
|| check
)
5902 DECL_VIRTUAL_P (decl
) = 1;
5907 /* DECL is a VAR_DECL for a static data member. Set flags to reflect
5908 the linkage that DECL will receive in the object file. */
5911 set_linkage_for_static_data_member (tree decl
)
5913 /* A static data member always has static storage duration and
5914 external linkage. Note that static data members are forbidden in
5915 local classes -- the only situation in which a class has
5916 non-external linkage. */
5917 TREE_PUBLIC (decl
) = 1;
5918 TREE_STATIC (decl
) = 1;
5919 /* For non-template classes, static data members are always put
5920 out in exactly those files where they are defined, just as
5921 with ordinary namespace-scope variables. */
5922 if (!processing_template_decl
)
5923 DECL_INTERFACE_KNOWN (decl
) = 1;
5926 /* Create a VAR_DECL named NAME with the indicated TYPE.
5928 If SCOPE is non-NULL, it is the class type or namespace containing
5929 the variable. If SCOPE is NULL, the variable should is created in
5930 the innermost enclosings scope. */
5933 grokvardecl (tree type
,
5935 const cp_decl_specifier_seq
*declspecs
,
5941 tree explicit_scope
;
5943 gcc_assert (!name
|| TREE_CODE (name
) == IDENTIFIER_NODE
);
5945 /* Compute the scope in which to place the variable, but remember
5946 whether or not that scope was explicitly specified by the user. */
5947 explicit_scope
= scope
;
5950 /* An explicit "extern" specifier indicates a namespace-scope
5952 if (declspecs
->storage_class
== sc_extern
)
5953 scope
= current_namespace
;
5954 else if (!at_function_scope_p ())
5955 scope
= current_scope ();
5959 && (/* If the variable is a namespace-scope variable declared in a
5960 template, we need DECL_LANG_SPECIFIC. */
5961 (TREE_CODE (scope
) == NAMESPACE_DECL
&& processing_template_decl
)
5962 /* Similarly for namespace-scope variables with language linkage
5964 || (TREE_CODE (scope
) == NAMESPACE_DECL
5965 && current_lang_name
!= lang_name_cplusplus
)
5966 /* Similarly for static data members. */
5968 decl
= build_lang_decl (VAR_DECL
, name
, type
);
5970 decl
= build_decl (VAR_DECL
, name
, type
);
5972 if (explicit_scope
&& TREE_CODE (explicit_scope
) == NAMESPACE_DECL
)
5973 set_decl_namespace (decl
, explicit_scope
, 0);
5975 DECL_CONTEXT (decl
) = scope
;
5977 if (declspecs
->storage_class
== sc_extern
)
5979 DECL_THIS_EXTERN (decl
) = 1;
5980 DECL_EXTERNAL (decl
) = !initialized
;
5983 if (DECL_CLASS_SCOPE_P (decl
))
5985 set_linkage_for_static_data_member (decl
);
5986 /* This function is only called with out-of-class definitions. */
5987 DECL_EXTERNAL (decl
) = 0;
5989 /* At top level, either `static' or no s.c. makes a definition
5990 (perhaps tentative), and absence of `static' makes it public. */
5991 else if (toplevel_bindings_p ())
5993 TREE_PUBLIC (decl
) = (declspecs
->storage_class
!= sc_static
5994 && (DECL_THIS_EXTERN (decl
) || ! constp
));
5995 TREE_STATIC (decl
) = ! DECL_EXTERNAL (decl
);
5997 /* Not at top level, only `static' makes a static definition. */
6000 TREE_STATIC (decl
) = declspecs
->storage_class
== sc_static
;
6001 TREE_PUBLIC (decl
) = DECL_EXTERNAL (decl
);
6004 if (declspecs
->specs
[(int)ds_thread
])
6006 if (targetm
.have_tls
)
6007 DECL_THREAD_LOCAL (decl
) = 1;
6009 /* A mere warning is sure to result in improper semantics
6010 at runtime. Don't bother to allow this to compile. */
6011 error ("thread-local storage not supported for this target");
6014 if (TREE_PUBLIC (decl
))
6016 /* [basic.link]: A name with no linkage (notably, the name of a class
6017 or enumeration declared in a local scope) shall not be used to
6018 declare an entity with linkage.
6020 Only check this for public decls for now. */
6021 tree t1
= TREE_TYPE (decl
);
6022 tree t
= no_linkage_check (t1
, /*relaxed_p=*/false);
6025 if (TYPE_ANONYMOUS_P (t
))
6027 if (DECL_EXTERN_C_P (decl
))
6028 /* Allow this; it's pretty common in C. */
6030 else if (same_type_ignoring_top_level_qualifiers_p(t1
, t
))
6031 /* This is something like "enum { a = 3 } x;", which is
6032 well formed. The enum doesn't have "a name with no
6033 linkage", because it has no name. See closed CWG issue
6036 Note that while this construct is well formed in C++03
6037 it is likely to become ill formed in C++0x. See open
6038 CWG issue 389 and related issues. */
6042 /* It's a typedef referring to an anonymous type. */
6043 pedwarn ("non-local variable %q#D uses anonymous type",
6045 if (DECL_ORIGINAL_TYPE (TYPE_NAME (t
)))
6046 cp_pedwarn_at ("%q#D does not refer to the unqualified "
6047 "type, so it is not used for linkage",
6052 pedwarn ("non-local variable %q#D uses local type %qT", decl
, t
);
6059 /* Create and return a canonical pointer to member function type, for
6060 TYPE, which is a POINTER_TYPE to a METHOD_TYPE. */
6063 build_ptrmemfunc_type (tree type
)
6067 tree unqualified_variant
= NULL_TREE
;
6069 if (type
== error_mark_node
)
6072 /* If a canonical type already exists for this type, use it. We use
6073 this method instead of type_hash_canon, because it only does a
6074 simple equality check on the list of field members. */
6076 if ((t
= TYPE_GET_PTRMEMFUNC_TYPE (type
)))
6079 /* Make sure that we always have the unqualified pointer-to-member
6081 if (cp_type_quals (type
) != TYPE_UNQUALIFIED
)
6083 = build_ptrmemfunc_type (TYPE_MAIN_VARIANT (type
));
6085 t
= make_aggr_type (RECORD_TYPE
);
6086 xref_basetypes (t
, NULL_TREE
);
6088 /* Let the front-end know this is a pointer to member function... */
6089 TYPE_PTRMEMFUNC_FLAG (t
) = 1;
6090 /* ... and not really an aggregate. */
6091 SET_IS_AGGR_TYPE (t
, 0);
6093 field
= build_decl (FIELD_DECL
, pfn_identifier
, type
);
6096 field
= build_decl (FIELD_DECL
, delta_identifier
, delta_type_node
);
6097 TREE_CHAIN (field
) = fields
;
6100 finish_builtin_struct (t
, "__ptrmemfunc_type", fields
, ptr_type_node
);
6102 /* Zap out the name so that the back-end will give us the debugging
6103 information for this anonymous RECORD_TYPE. */
6104 TYPE_NAME (t
) = NULL_TREE
;
6106 /* If this is not the unqualified form of this pointer-to-member
6107 type, set the TYPE_MAIN_VARIANT for this type to be the
6108 unqualified type. Since they are actually RECORD_TYPEs that are
6109 not variants of each other, we must do this manually. */
6110 if (cp_type_quals (type
) != TYPE_UNQUALIFIED
)
6112 t
= build_qualified_type (t
, cp_type_quals (type
));
6113 TYPE_MAIN_VARIANT (t
) = unqualified_variant
;
6114 TYPE_NEXT_VARIANT (t
) = TYPE_NEXT_VARIANT (unqualified_variant
);
6115 TYPE_NEXT_VARIANT (unqualified_variant
) = t
;
6118 /* Cache this pointer-to-member type so that we can find it again
6120 TYPE_SET_PTRMEMFUNC_TYPE (type
, t
);
6125 /* Create and return a pointer to data member type. */
6128 build_ptrmem_type (tree class_type
, tree member_type
)
6130 if (TREE_CODE (member_type
) == METHOD_TYPE
)
6134 arg_types
= TYPE_ARG_TYPES (member_type
);
6135 class_type
= (cp_build_qualified_type
6137 cp_type_quals (TREE_TYPE (TREE_VALUE (arg_types
)))));
6139 = build_method_type_directly (class_type
,
6140 TREE_TYPE (member_type
),
6141 TREE_CHAIN (arg_types
));
6142 return build_ptrmemfunc_type (build_pointer_type (member_type
));
6146 gcc_assert (TREE_CODE (member_type
) != FUNCTION_TYPE
);
6147 return build_offset_type (class_type
, member_type
);
6151 /* DECL is a VAR_DECL defined in-class, whose TYPE is also given.
6152 Check to see that the definition is valid. Issue appropriate error
6153 messages. Return 1 if the definition is particularly bad, or 0
6157 check_static_variable_definition (tree decl
, tree type
)
6159 /* Motion 10 at San Diego: If a static const integral data member is
6160 initialized with an integral constant expression, the initializer
6161 may appear either in the declaration (within the class), or in
6162 the definition, but not both. If it appears in the class, the
6163 member is a member constant. The file-scope definition is always
6165 if (!ARITHMETIC_TYPE_P (type
) && TREE_CODE (type
) != ENUMERAL_TYPE
)
6167 error ("invalid in-class initialization of static data member "
6168 "of non-integral type %qT",
6170 /* If we just return the declaration, crashes will sometimes
6171 occur. We therefore return void_type_node, as if this were a
6172 friend declaration, to cause callers to completely ignore
6173 this declaration. */
6176 else if (!CP_TYPE_CONST_P (type
))
6177 error ("ISO C++ forbids in-class initialization of non-const "
6178 "static member %qD",
6180 else if (pedantic
&& !INTEGRAL_TYPE_P (type
))
6181 pedwarn ("ISO C++ forbids initialization of member constant "
6182 "%qD of non-integral type %qT", decl
, type
);
6187 /* Given the SIZE (i.e., number of elements) in an array, compute an
6188 appropriate index type for the array. If non-NULL, NAME is the
6189 name of the thing being declared. */
6192 compute_array_index_type (tree name
, tree size
)
6194 tree type
= TREE_TYPE (size
);
6197 /* The array bound must be an integer type. */
6198 if (!dependent_type_p (type
) && !INTEGRAL_TYPE_P (type
))
6201 error ("size of array %qD has non-integral type %qT", name
, type
);
6203 error ("size of array has non-integral type %qT", type
);
6204 size
= integer_one_node
;
6205 type
= TREE_TYPE (size
);
6208 if (abi_version_at_least (2)
6209 /* We should only handle value dependent expressions specially. */
6210 ? value_dependent_expression_p (size
)
6211 /* But for abi-1, we handled all instances in templates. This
6212 effects the manglings produced. */
6213 : processing_template_decl
)
6214 return build_index_type (build_min (MINUS_EXPR
, sizetype
,
6215 size
, integer_one_node
));
6217 /* The size might be the result of a cast. */
6218 STRIP_TYPE_NOPS (size
);
6220 /* It might be a const variable or enumeration constant. */
6221 size
= integral_constant_value (size
);
6223 /* Normally, the array-bound will be a constant. */
6224 if (TREE_CODE (size
) == INTEGER_CST
)
6226 /* Check to see if the array bound overflowed. Make that an
6227 error, no matter how generous we're being. */
6228 int old_flag_pedantic_errors
= flag_pedantic_errors
;
6229 int old_pedantic
= pedantic
;
6230 pedantic
= flag_pedantic_errors
= 1;
6231 constant_expression_warning (size
);
6232 pedantic
= old_pedantic
;
6233 flag_pedantic_errors
= old_flag_pedantic_errors
;
6235 /* An array must have a positive number of elements. */
6236 if (INT_CST_LT (size
, integer_zero_node
))
6239 error ("size of array %qD is negative", name
);
6241 error ("size of array is negative");
6242 size
= integer_one_node
;
6244 /* As an extension we allow zero-sized arrays. We always allow
6245 them in system headers because glibc uses them. */
6246 else if (integer_zerop (size
) && pedantic
&& !in_system_header
)
6249 pedwarn ("ISO C++ forbids zero-size array %qD", name
);
6251 pedwarn ("ISO C++ forbids zero-size array");
6254 else if (TREE_CONSTANT (size
))
6256 /* `(int) &fn' is not a valid array bound. */
6258 error ("size of array %qD is not an integral constant-expression",
6261 error ("size of array is not an integral constant-expression");
6266 pedwarn ("ISO C++ forbids variable-size array %qD", name
);
6268 pedwarn ("ISO C++ forbids variable-size array");
6271 if (processing_template_decl
&& !TREE_CONSTANT (size
))
6272 /* A variable sized array. */
6273 itype
= build_min (MINUS_EXPR
, sizetype
, size
, integer_one_node
);
6276 HOST_WIDE_INT saved_processing_template_decl
;
6278 /* Compute the index of the largest element in the array. It is
6279 one less than the number of elements in the array. We save
6280 and restore PROCESSING_TEMPLATE_DECL so that computations in
6281 cp_build_binary_op will be appropriately folded. */
6282 saved_processing_template_decl
= processing_template_decl
;
6283 processing_template_decl
= 0;
6284 itype
= cp_build_binary_op (MINUS_EXPR
,
6285 cp_convert (ssizetype
, size
),
6286 cp_convert (ssizetype
, integer_one_node
));
6287 itype
= fold (itype
);
6288 processing_template_decl
= saved_processing_template_decl
;
6290 if (!TREE_CONSTANT (itype
))
6291 /* A variable sized array. */
6292 itype
= variable_size (itype
);
6293 /* Make sure that there was no overflow when creating to a signed
6294 index type. (For example, on a 32-bit machine, an array with
6295 size 2^32 - 1 is too big.) */
6296 else if (TREE_OVERFLOW (itype
))
6298 error ("overflow in array dimension");
6299 TREE_OVERFLOW (itype
) = 0;
6303 /* Create and return the appropriate index type. */
6304 return build_index_type (itype
);
6307 /* Returns the scope (if any) in which the entity declared by
6308 DECLARATOR will be located. If the entity was declared with an
6309 unqualified name, NULL_TREE is returned. */
6312 get_scope_of_declarator (const cp_declarator
*declarator
)
6314 while (declarator
&& declarator
->kind
!= cdk_id
)
6315 declarator
= declarator
->declarator
;
6317 /* If the declarator-id is a SCOPE_REF, the scope in which the
6318 declaration occurs is the first operand. */
6320 && declarator
->u
.id
.name
6321 && TREE_CODE (declarator
->u
.id
.name
) == SCOPE_REF
)
6322 return TREE_OPERAND (declarator
->u
.id
.name
, 0);
6324 /* Otherwise, the declarator is not a qualified name; the entity will
6325 be declared in the current scope. */
6329 /* Returns an ARRAY_TYPE for an array with SIZE elements of the
6330 indicated TYPE. If non-NULL, NAME is the NAME of the declaration
6334 create_array_type_for_decl (tree name
, tree type
, tree size
)
6336 tree itype
= NULL_TREE
;
6337 const char* error_msg
;
6339 /* If things have already gone awry, bail now. */
6340 if (type
== error_mark_node
|| size
== error_mark_node
)
6341 return error_mark_node
;
6343 /* Assume that everything will go OK. */
6346 /* There are some types which cannot be array elements. */
6347 switch (TREE_CODE (type
))
6350 error_msg
= "array of void";
6354 error_msg
= "array of functions";
6357 case REFERENCE_TYPE
:
6358 error_msg
= "array of references";
6362 error_msg
= "array of function members";
6369 /* If something went wrong, issue an error-message and return. */
6373 error ("declaration of %qD as %s", name
, error_msg
);
6375 error ("creating %s", error_msg
);
6377 return error_mark_node
;
6382 The constant expressions that specify the bounds of the arrays
6383 can be omitted only for the first member of the sequence. */
6384 if (TREE_CODE (type
) == ARRAY_TYPE
&& !TYPE_DOMAIN (type
))
6387 error ("declaration of %qD as multidimensional array must "
6388 "have bounds for all dimensions except the first",
6391 error ("multidimensional array must have bounds for all "
6392 "dimensions except the first");
6394 return error_mark_node
;
6397 /* Figure out the index type for the array. */
6399 itype
= compute_array_index_type (name
, size
);
6402 T is called the array element type; this type shall not be [...] an
6403 abstract class type. */
6404 abstract_virtuals_error (name
, type
);
6406 return build_cplus_array_type (type
, itype
);
6409 /* Check that it's OK to declare a function with the indicated TYPE.
6410 SFK indicates the kind of special function (if any) that this
6411 function is. OPTYPE is the type given in a conversion operator
6412 declaration, or the class type for a constructor/destructor.
6413 Returns the actual return type of the function; that
6414 may be different than TYPE if an error occurs, or for certain
6415 special functions. */
6418 check_special_function_return_type (special_function_kind sfk
,
6424 case sfk_constructor
:
6426 error ("return type specification for constructor invalid");
6428 if (targetm
.cxx
.cdtor_returns_this () && !TYPE_FOR_JAVA (optype
))
6429 type
= build_pointer_type (optype
);
6431 type
= void_type_node
;
6434 case sfk_destructor
:
6436 error ("return type specification for destructor invalid");
6437 /* We can't use the proper return type here because we run into
6438 problems with ambiguous bases and covariant returns.
6439 Java classes are left unchanged because (void *) isn't a valid
6440 Java type, and we don't want to change the Java ABI. */
6441 if (targetm
.cxx
.cdtor_returns_this () && !TYPE_FOR_JAVA (optype
))
6442 type
= build_pointer_type (void_type_node
);
6444 type
= void_type_node
;
6447 case sfk_conversion
:
6448 if (type
&& !same_type_p (type
, optype
))
6449 error ("operator %qT declared to return %qT", optype
, type
);
6451 pedwarn ("return type specified for %<operator %T%>", optype
);
6462 /* A variable or data member (whose unqualified name is IDENTIFIER)
6463 has been declared with the indicated TYPE. If the TYPE is not
6464 acceptable, issue an error message and return a type to use for
6465 error-recovery purposes. */
6468 check_var_type (tree identifier
, tree type
)
6470 if (VOID_TYPE_P (type
))
6473 error ("unnamed variable or field declared void");
6474 else if (TREE_CODE (identifier
) == IDENTIFIER_NODE
)
6476 gcc_assert (!IDENTIFIER_OPNAME_P (identifier
));
6477 error ("variable or field %qE declared void", identifier
);
6480 error ("variable or field declared void");
6481 type
= integer_type_node
;
6487 /* Given declspecs and a declarator (abstract or otherwise), determine
6488 the name and type of the object declared and construct a DECL node
6491 DECLSPECS is a chain of tree_list nodes whose value fields
6492 are the storage classes and type specifiers.
6494 DECL_CONTEXT says which syntactic context this declaration is in:
6495 NORMAL for most contexts. Make a VAR_DECL or FUNCTION_DECL or TYPE_DECL.
6496 FUNCDEF for a function definition. Like NORMAL but a few different
6497 error messages in each case. Return value may be zero meaning
6498 this definition is too screwy to try to parse.
6499 MEMFUNCDEF for a function definition. Like FUNCDEF but prepares to
6500 handle member functions (which have FIELD context).
6501 Return value may be zero meaning this definition is too screwy to
6503 PARM for a parameter declaration (either within a function prototype
6504 or before a function body). Make a PARM_DECL, or return void_type_node.
6505 CATCHPARM for a parameter declaration before a catch clause.
6506 TYPENAME if for a typename (in a cast or sizeof).
6507 Don't make a DECL node; just return the ..._TYPE node.
6508 FIELD for a struct or union field; make a FIELD_DECL.
6509 BITFIELD for a field with specified width.
6510 INITIALIZED is 1 if the decl has an initializer.
6512 ATTRLIST is a pointer to the list of attributes, which may be NULL
6513 if there are none; *ATTRLIST may be modified if attributes from inside
6514 the declarator should be applied to the declaration.
6516 When this function is called, scoping variables (such as
6517 CURRENT_CLASS_TYPE) should reflect the scope in which the
6518 declaration occurs, not the scope in which the new declaration will
6519 be placed. For example, on:
6523 when grokdeclarator is called for `S::f', the CURRENT_CLASS_TYPE
6524 should not be `S'. */
6527 grokdeclarator (const cp_declarator
*declarator
,
6528 const cp_decl_specifier_seq
*declspecs
,
6529 enum decl_context decl_context
,
6533 tree type
= NULL_TREE
;
6536 int virtualp
, explicitp
, friendp
, inlinep
, staticp
;
6537 int explicit_int
= 0;
6538 int explicit_char
= 0;
6539 int defaulted_int
= 0;
6540 tree dependant_name
= NULL_TREE
;
6542 tree typedef_decl
= NULL_TREE
;
6543 const char *name
= NULL
;
6544 tree typedef_type
= NULL_TREE
;
6545 int funcdef_flag
= 0;
6546 cp_declarator_kind innermost_code
= cdk_error
;
6549 /* See the code below that used this. */
6550 tree decl_attr
= NULL_TREE
;
6553 /* Keep track of what sort of function is being processed
6554 so that we can warn about default return values, or explicit
6555 return values which do not match prescribed defaults. */
6556 special_function_kind sfk
= sfk_none
;
6558 tree dname
= NULL_TREE
;
6559 tree ctor_return_type
= NULL_TREE
;
6560 enum overload_flags flags
= NO_SPECIAL
;
6561 cp_cv_quals quals
= TYPE_UNQUALIFIED
;
6562 tree raises
= NULL_TREE
;
6563 int template_count
= 0;
6564 tree returned_attrs
= NULL_TREE
;
6565 tree parms
= NULL_TREE
;
6566 const cp_declarator
*id_declarator
;
6567 /* The unqualified name of the declarator; either an
6568 IDENTIFIER_NODE, BIT_NOT_EXPR, or TEMPLATE_ID_EXPR. */
6569 tree unqualified_id
;
6570 /* The class type, if any, in which this entity is located,
6571 or NULL_TREE if none. Note that this value may be different from
6572 the current class type; for example if an attempt is made to declare
6573 "A::f" inside "B", this value will be "A". */
6574 tree ctype
= current_class_type
;
6575 /* The NAMESPACE_DECL for the namespace in which this entity is
6576 located. If an unqualified name is used to declare the entity,
6577 this value will be NULL_TREE, even if the entity is located at
6579 tree in_namespace
= NULL_TREE
;
6581 cp_storage_class storage_class
;
6582 bool unsigned_p
, signed_p
, short_p
, long_p
, thread_p
;
6583 bool type_was_error_mark_node
= false;
6585 signed_p
= declspecs
->specs
[(int)ds_signed
];
6586 unsigned_p
= declspecs
->specs
[(int)ds_unsigned
];
6587 short_p
= declspecs
->specs
[(int)ds_short
];
6588 long_p
= declspecs
->specs
[(int)ds_long
];
6589 thread_p
= declspecs
->specs
[(int)ds_thread
];
6591 if (decl_context
== FUNCDEF
)
6592 funcdef_flag
= 1, decl_context
= NORMAL
;
6593 else if (decl_context
== MEMFUNCDEF
)
6594 funcdef_flag
= -1, decl_context
= FIELD
;
6595 else if (decl_context
== BITFIELD
)
6596 bitfield
= 1, decl_context
= FIELD
;
6598 /* Look inside a declarator for the name being declared
6599 and get it as a string, for an error message. */
6600 for (id_declarator
= declarator
;
6602 id_declarator
= id_declarator
->declarator
)
6604 if (id_declarator
->kind
!= cdk_id
)
6605 innermost_code
= id_declarator
->kind
;
6607 switch (id_declarator
->kind
)
6610 if (id_declarator
->declarator
6611 && id_declarator
->declarator
->kind
== cdk_id
)
6613 sfk
= id_declarator
->declarator
->u
.id
.sfk
;
6614 if (sfk
== sfk_destructor
)
6621 tree decl
= id_declarator
->u
.id
.name
;
6624 if (TREE_CODE (decl
) == SCOPE_REF
)
6626 tree qualifying_scope
= TREE_OPERAND (decl
, 0);
6628 /* It is valid to write:
6630 class C { void f(); };
6634 The standard is not clear about whether `typedef const C D' is
6635 legal; as of 2002-09-15 the committee is considering
6636 that question. EDG 3.0 allows that syntax.
6637 Therefore, we do as well. */
6638 if (qualifying_scope
&& TYPE_P (qualifying_scope
))
6640 ctype
= TYPE_MAIN_VARIANT (qualifying_scope
);
6641 if (innermost_code
!= cdk_function
6642 && current_class_type
6643 && !UNIQUELY_DERIVED_FROM_P (ctype
,
6644 current_class_type
))
6646 error ("type %qT is not derived from type %qT",
6647 ctype
, current_class_type
);
6650 TREE_OPERAND (decl
, 0) = ctype
;
6652 else if (TREE_CODE (qualifying_scope
) == NAMESPACE_DECL
)
6653 in_namespace
= qualifying_scope
;
6654 decl
= TREE_OPERAND (decl
, 1);
6656 if (TREE_CODE (decl
) == BASELINK
)
6657 decl
= BASELINK_FUNCTIONS (decl
);
6658 if (decl
== error_mark_node
)
6659 return error_mark_node
;
6660 switch (TREE_CODE (decl
))
6664 tree type
= TREE_OPERAND (decl
, 0);
6665 type
= constructor_name (type
);
6666 name
= IDENTIFIER_POINTER (type
);
6670 case TEMPLATE_ID_EXPR
:
6672 tree fns
= TREE_OPERAND (decl
, 0);
6675 if (TREE_CODE (dname
) == COMPONENT_REF
)
6676 dname
= TREE_OPERAND (dname
, 1);
6677 if (TREE_CODE (dname
) != IDENTIFIER_NODE
)
6679 gcc_assert (is_overloaded_fn (dname
));
6680 dname
= DECL_NAME (get_first_fn (dname
));
6685 case IDENTIFIER_NODE
:
6686 if (TREE_CODE (decl
) == IDENTIFIER_NODE
)
6689 if (C_IS_RESERVED_WORD (dname
))
6691 error ("declarator-id missing; using reserved word %qD",
6693 name
= IDENTIFIER_POINTER (dname
);
6695 else if (!IDENTIFIER_TYPENAME_P (dname
))
6696 name
= IDENTIFIER_POINTER (dname
);
6699 gcc_assert (flags
== NO_SPECIAL
);
6700 flags
= TYPENAME_FLAG
;
6701 ctor_return_type
= TREE_TYPE (dname
);
6702 sfk
= sfk_conversion
;
6703 if (is_typename_at_global_scope (dname
))
6704 name
= IDENTIFIER_POINTER (dname
);
6706 name
= "<invalid operator>";
6711 dname
= constructor_name (TREE_TYPE (decl
));
6712 name
= IDENTIFIER_POINTER (dname
);
6733 if (id_declarator
->kind
== cdk_id
)
6737 /* A function definition's declarator must have the form of
6738 a function declarator. */
6740 if (funcdef_flag
&& innermost_code
!= cdk_function
)
6743 if (((dname
&& IDENTIFIER_OPNAME_P (dname
)) || flags
== TYPENAME_FLAG
)
6744 && innermost_code
!= cdk_function
6745 && ! (ctype
&& !declspecs
->any_specifiers_p
))
6747 error ("declaration of %qD as non-function", dname
);
6748 return error_mark_node
;
6751 /* Anything declared one level down from the top level
6752 must be one of the parameters of a function
6753 (because the body is at least two levels down). */
6755 /* This heuristic cannot be applied to C++ nodes! Fixed, however,
6756 by not allowing C++ class definitions to specify their parameters
6757 with xdecls (must be spec.d in the parmlist).
6759 Since we now wait to push a class scope until we are sure that
6760 we are in a legitimate method context, we must set oldcname
6761 explicitly (since current_class_name is not yet alive).
6763 We also want to avoid calling this a PARM if it is in a namespace. */
6765 if (decl_context
== NORMAL
&& !toplevel_bindings_p ())
6767 struct cp_binding_level
*b
= current_binding_level
;
6768 current_binding_level
= b
->level_chain
;
6769 if (current_binding_level
!= 0 && toplevel_bindings_p ())
6770 decl_context
= PARM
;
6771 current_binding_level
= b
;
6775 name
= decl_context
== PARM
? "parameter" : "type name";
6777 /* If there were multiple types specified in the decl-specifier-seq,
6778 issue an error message. */
6779 if (declspecs
->multiple_types_p
)
6780 error ("two or more data types in declaration of %qs", name
);
6781 /* Extract the basic type from the decl-specifier-seq. */
6782 type
= declspecs
->type
;
6783 if (type
== error_mark_node
)
6786 type_was_error_mark_node
= true;
6788 /* If the entire declaration is itself tagged as deprecated then
6789 suppress reports of deprecated items. */
6790 if (type
&& TREE_DEPRECATED (type
)
6791 && deprecated_state
!= DEPRECATED_SUPPRESS
)
6792 warn_deprecated_use (type
);
6793 if (type
&& TREE_CODE (type
) == TYPE_DECL
)
6795 typedef_decl
= type
;
6796 type
= TREE_TYPE (typedef_decl
);
6798 /* No type at all: default to `int', and set DEFAULTED_INT
6799 because it was not a user-defined typedef. */
6800 if (type
== NULL_TREE
&& (signed_p
|| unsigned_p
|| long_p
|| short_p
))
6802 /* These imply 'int'. */
6803 type
= integer_type_node
;
6807 explicit_int
= declspecs
->explicit_int_p
;
6808 explicit_char
= declspecs
->explicit_char_p
;
6810 /* Check for repeated decl-specifiers. */
6811 for (ds
= ds_first
; ds
!= ds_last
; ++ds
)
6813 unsigned count
= declspecs
->specs
[(int)ds
];
6816 /* The "long" specifier is a special case because of
6821 error ("%<long long long%> is too long for GCC");
6822 else if (pedantic
&& !in_system_header
&& warn_long_long
)
6823 pedwarn ("ISO C++ does not support %<long long%>");
6827 else if (declspecs
->specs
[(int)ds
] > 1)
6829 static const char *const decl_spec_names
[] = {
6845 error ("duplicate %qs", decl_spec_names
[(int)ds
]);
6850 /* See the code below that used this. */
6852 decl_attr
= DECL_ATTRIBUTES (typedef_decl
);
6854 typedef_type
= type
;
6857 if (sfk
!= sfk_conversion
)
6858 ctor_return_type
= ctype
;
6860 if (sfk
!= sfk_none
)
6861 type
= check_special_function_return_type (sfk
, type
,
6863 else if (type
== NULL_TREE
)
6869 /* We handle `main' specially here, because 'main () { }' is so
6870 common. With no options, it is allowed. With -Wreturn-type,
6871 it is a warning. It is only an error with -pedantic-errors. */
6872 is_main
= (funcdef_flag
6873 && dname
&& MAIN_NAME_P (dname
)
6874 && ctype
== NULL_TREE
6875 && in_namespace
== NULL_TREE
6876 && current_namespace
== global_namespace
);
6878 if (type_was_error_mark_node
)
6879 /* We've already issued an error, don't complain more. */;
6880 else if (in_system_header
|| flag_ms_extensions
)
6881 /* Allow it, sigh. */;
6882 else if (pedantic
|| ! is_main
)
6883 pedwarn ("ISO C++ forbids declaration of %qs with no type", name
);
6884 else if (warn_return_type
)
6885 warning ("ISO C++ forbids declaration of %qs with no type", name
);
6887 type
= integer_type_node
;
6892 /* Now process the modifiers that were specified
6893 and check for invalid combinations. */
6895 /* Long double is a special combination. */
6896 if (long_p
&& TYPE_MAIN_VARIANT (type
) == double_type_node
)
6899 type
= build_qualified_type (long_double_type_node
,
6900 cp_type_quals (type
));
6903 /* Check all other uses of type modifiers. */
6905 if (unsigned_p
|| signed_p
|| long_p
|| short_p
)
6909 if (TREE_CODE (type
) == REAL_TYPE
)
6910 error ("short, signed or unsigned invalid for %qs", name
);
6911 else if (TREE_CODE (type
) != INTEGER_TYPE
)
6912 error ("long, short, signed or unsigned invalid for %qs", name
);
6913 else if (long_p
&& short_p
)
6914 error ("long and short specified together for %qs", name
);
6915 else if ((long_p
|| short_p
) && explicit_char
)
6916 error ("long or short specified with char for %qs", name
);
6917 else if ((long_p
|| short_p
) && TREE_CODE (type
) == REAL_TYPE
)
6918 error ("long or short specified with floating type for %qs", name
);
6919 else if (signed_p
&& unsigned_p
)
6920 error ("signed and unsigned given together for %qs", name
);
6924 if (!explicit_int
&& !defaulted_int
&& !explicit_char
&& pedantic
)
6926 pedwarn ("long, short, signed or unsigned used invalidly for %qs",
6928 if (flag_pedantic_errors
)
6933 /* Discard the type modifiers if they are invalid. */
6944 /* Decide whether an integer type is signed or not.
6945 Optionally treat bitfields as signed by default. */
6949 It is implementation-defined whether a plain (neither
6950 explicitly signed or unsigned) char, short, int, or long
6951 bit-field is signed or unsigned.
6953 Naturally, we extend this to long long as well. Note that
6954 this does not include wchar_t. */
6955 || (bitfield
&& !flag_signed_bitfields
6957 /* A typedef for plain `int' without `signed' can be
6958 controlled just like plain `int', but a typedef for
6959 `signed int' cannot be so controlled. */
6961 && C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl
))
6962 && (TREE_CODE (type
) == INTEGER_TYPE
6963 || TREE_CODE (type
) == CHAR_TYPE
)
6964 && !same_type_p (TYPE_MAIN_VARIANT (type
), wchar_type_node
)))
6967 type
= long_long_unsigned_type_node
;
6969 type
= long_unsigned_type_node
;
6971 type
= short_unsigned_type_node
;
6972 else if (type
== char_type_node
)
6973 type
= unsigned_char_type_node
;
6974 else if (typedef_decl
)
6975 type
= c_common_unsigned_type (type
);
6977 type
= unsigned_type_node
;
6979 else if (signed_p
&& type
== char_type_node
)
6980 type
= signed_char_type_node
;
6982 type
= long_long_integer_type_node
;
6984 type
= long_integer_type_node
;
6986 type
= short_integer_type_node
;
6988 if (declspecs
->specs
[(int)ds_complex
])
6990 if (TREE_CODE (type
) != INTEGER_TYPE
&& TREE_CODE (type
) != REAL_TYPE
)
6991 error ("complex invalid for %qs", name
);
6992 /* If we just have "complex", it is equivalent to
6993 "complex double", but if any modifiers at all are specified it is
6994 the complex form of TYPE. E.g, "complex short" is
6995 "complex short int". */
6997 else if (defaulted_int
&& ! longlong
6998 && ! (long_p
|| short_p
|| signed_p
|| unsigned_p
))
6999 type
= complex_double_type_node
;
7000 else if (type
== integer_type_node
)
7001 type
= complex_integer_type_node
;
7002 else if (type
== float_type_node
)
7003 type
= complex_float_type_node
;
7004 else if (type
== double_type_node
)
7005 type
= complex_double_type_node
;
7006 else if (type
== long_double_type_node
)
7007 type
= complex_long_double_type_node
;
7009 type
= build_complex_type (type
);
7012 type_quals
= TYPE_UNQUALIFIED
;
7013 if (declspecs
->specs
[(int)ds_const
])
7014 type_quals
|= TYPE_QUAL_CONST
;
7015 if (declspecs
->specs
[(int)ds_volatile
])
7016 type_quals
|= TYPE_QUAL_VOLATILE
;
7017 if (declspecs
->specs
[(int)ds_restrict
])
7018 type_quals
|= TYPE_QUAL_RESTRICT
;
7019 if (sfk
== sfk_conversion
&& type_quals
!= TYPE_UNQUALIFIED
)
7020 error ("qualifiers are not allowed on declaration of %<operator %T%>",
7023 type_quals
|= cp_type_quals (type
);
7024 type
= cp_build_qualified_type_real
7025 (type
, type_quals
, ((typedef_decl
&& !DECL_ARTIFICIAL (typedef_decl
)
7026 ? tf_ignore_bad_quals
: 0) | tf_error
| tf_warning
));
7027 /* We might have ignored or rejected some of the qualifiers. */
7028 type_quals
= cp_type_quals (type
);
7031 inlinep
= !! declspecs
->specs
[(int)ds_inline
];
7032 virtualp
= !! declspecs
->specs
[(int)ds_virtual
];
7033 explicitp
= !! declspecs
->specs
[(int)ds_explicit
];
7035 storage_class
= declspecs
->storage_class
;
7036 if (storage_class
== sc_static
)
7037 staticp
= 1 + (decl_context
== FIELD
);
7039 if (virtualp
&& staticp
== 2)
7041 error ("member %qD cannot be declared both virtual and static", dname
);
7044 friendp
= !! declspecs
->specs
[(int)ds_friend
];
7046 if (dependant_name
&& !friendp
)
7048 error ("%<%T::%D%> is not a valid declarator", ctype
, dependant_name
);
7049 return void_type_node
;
7052 /* Issue errors about use of storage classes for parameters. */
7053 if (decl_context
== PARM
)
7055 if (declspecs
->specs
[(int)ds_typedef
])
7056 error ("typedef declaration invalid in parameter declaration");
7057 else if (storage_class
== sc_static
7058 || storage_class
== sc_extern
7060 error ("storage class specifiers invalid in parameter declarations");
7063 /* Give error if `virtual' is used outside of class declaration. */
7065 && (current_class_name
== NULL_TREE
|| decl_context
!= FIELD
))
7067 error ("virtual outside class declaration");
7071 /* Static anonymous unions are dealt with here. */
7072 if (staticp
&& decl_context
== TYPENAME
7074 && ANON_AGGR_TYPE_P (declspecs
->type
))
7075 decl_context
= FIELD
;
7077 /* Warn about storage classes that are invalid for certain
7078 kinds of declarations (parameters, typenames, etc.). */
7079 if (declspecs
->multiple_storage_classes_p
)
7080 error ("multiple storage classes in declaration of %qs", name
);
7083 && storage_class
!= sc_extern
7084 && storage_class
!= sc_static
)
7085 || declspecs
->specs
[(int)ds_typedef
]))
7087 error ("multiple storage classes in declaration of %qs", name
);
7090 else if (decl_context
!= NORMAL
7091 && ((storage_class
!= sc_none
7092 && storage_class
!= sc_mutable
)
7095 if ((decl_context
== PARM
|| decl_context
== CATCHPARM
)
7096 && (storage_class
== sc_register
7097 || storage_class
== sc_auto
))
7099 else if (declspecs
->specs
[(int)ds_typedef
])
7101 else if (decl_context
== FIELD
7102 /* C++ allows static class elements. */
7103 && storage_class
== sc_static
)
7104 /* C++ also allows inlines and signed and unsigned elements,
7105 but in those cases we don't come in here. */
7109 if (decl_context
== FIELD
)
7111 tree tmp
= NULL_TREE
;
7116 /* Avoid trying to get an operand off an identifier node. */
7117 if (declarator
->kind
!= cdk_id
)
7118 tmp
= declarator
->declarator
->u
.id
.name
;
7120 tmp
= declarator
->u
.id
.name
;
7121 op
= IDENTIFIER_OPNAME_P (tmp
);
7122 if (IDENTIFIER_TYPENAME_P (tmp
))
7124 if (is_typename_at_global_scope (tmp
))
7125 name
= IDENTIFIER_POINTER (tmp
);
7127 name
= "<invalid operator>";
7130 error ("storage class specified for %s %qs",
7131 op
? "member operator" : "field",
7136 if (decl_context
== PARM
|| decl_context
== CATCHPARM
)
7137 error ("storage class specified for parameter %qs", name
);
7139 error ("storage class specified for typename");
7141 if (storage_class
== sc_register
7142 || storage_class
== sc_auto
7143 || storage_class
== sc_extern
7145 storage_class
= sc_none
;
7148 else if (storage_class
== sc_extern
&& initialized
7151 if (toplevel_bindings_p ())
7153 /* It's common practice (and completely valid) to have a const
7154 be initialized and declared extern. */
7155 if (!(type_quals
& TYPE_QUAL_CONST
))
7156 warning ("%qs initialized and declared %<extern%>", name
);
7159 error ("%qs has both %<extern%> and initializer", name
);
7161 else if (storage_class
== sc_extern
&& funcdef_flag
7162 && ! toplevel_bindings_p ())
7163 error ("nested function %qs declared %<extern%>", name
);
7164 else if (toplevel_bindings_p ())
7166 if (storage_class
== sc_auto
)
7167 error ("top-level declaration of %qs specifies %<auto%>", name
);
7170 && storage_class
!= sc_extern
7171 && storage_class
!= sc_static
)
7173 error ("function-scope %qs implicitly auto and declared %<__thread%>",
7178 if (storage_class
&& friendp
)
7179 error ("storage class specifiers invalid in friend function declarations");
7182 unqualified_id
= NULL_TREE
;
7185 unqualified_id
= id_declarator
->u
.id
.name
;
7186 if (TREE_CODE (unqualified_id
) == SCOPE_REF
)
7187 unqualified_id
= TREE_OPERAND (unqualified_id
, 1);
7188 if (TREE_CODE (unqualified_id
) == BASELINK
)
7189 unqualified_id
= BASELINK_FUNCTIONS (unqualified_id
);
7190 switch (TREE_CODE (unqualified_id
))
7194 = constructor_name (TREE_OPERAND (unqualified_id
, 0));
7199 = constructor_name (TREE_TYPE (unqualified_id
));
7202 case IDENTIFIER_NODE
:
7203 case TEMPLATE_ID_EXPR
:
7211 /* Determine the type of the entity declared by recurring on the
7214 declarator
&& declarator
->kind
!= cdk_id
;
7215 declarator
= declarator
->declarator
)
7217 const cp_declarator
*inner_declarator
;
7220 if (type
== error_mark_node
)
7221 return error_mark_node
;
7223 inner_declarator
= declarator
->declarator
;
7225 attrs
= declarator
->attributes
;
7231 if (declarator
== NULL
|| declarator
->kind
== cdk_id
)
7232 attr_flags
|= (int) ATTR_FLAG_DECL_NEXT
;
7233 if (declarator
->kind
== cdk_function
)
7234 attr_flags
|= (int) ATTR_FLAG_FUNCTION_NEXT
;
7235 if (declarator
->kind
== cdk_array
)
7236 attr_flags
|= (int) ATTR_FLAG_ARRAY_NEXT
;
7237 returned_attrs
= decl_attributes (&type
,
7238 chainon (returned_attrs
, attrs
),
7242 switch (declarator
->kind
)
7245 type
= create_array_type_for_decl (dname
, type
,
7246 declarator
->u
.array
.bounds
);
7254 /* Declaring a function type.
7255 Make sure we have a valid type for the function to return. */
7257 /* We now know that the TYPE_QUALS don't apply to the
7258 decl, but to its return type. */
7259 type_quals
= TYPE_UNQUALIFIED
;
7261 /* Warn about some types functions can't return. */
7263 if (TREE_CODE (type
) == FUNCTION_TYPE
)
7265 error ("%qs declared as function returning a function", name
);
7266 type
= integer_type_node
;
7268 if (TREE_CODE (type
) == ARRAY_TYPE
)
7270 error ("%qs declared as function returning an array", name
);
7271 type
= integer_type_node
;
7274 /* Pick up type qualifiers which should be applied to `this'. */
7275 quals
= declarator
->u
.function
.qualifiers
;
7277 /* Pick up the exception specifications. */
7278 raises
= declarator
->u
.function
.exception_specification
;
7280 /* Say it's a definition only for the CALL_EXPR
7281 closest to the identifier. */
7282 funcdecl_p
= inner_declarator
&& inner_declarator
->kind
== cdk_id
;
7284 if (ctype
== NULL_TREE
7285 && decl_context
== FIELD
7287 && (friendp
== 0 || dname
== current_class_name
))
7288 ctype
= current_class_type
;
7290 if (ctype
&& sfk
== sfk_conversion
)
7291 TYPE_HAS_CONVERSION (ctype
) = 1;
7292 if (ctype
&& (sfk
== sfk_constructor
7293 || sfk
== sfk_destructor
))
7295 /* We are within a class's scope. If our declarator name
7296 is the same as the class name, and we are defining
7297 a function, then it is a constructor/destructor, and
7298 therefore returns a void type. */
7300 if (flags
== DTOR_FLAG
)
7302 /* ISO C++ 12.4/2. A destructor may not be
7303 declared const or volatile. A destructor may
7306 error ("destructor cannot be static member function");
7309 error ("destructors may not be cv-qualified");
7310 quals
= TYPE_UNQUALIFIED
;
7312 if (decl_context
== FIELD
)
7314 if (! member_function_or_else (ctype
,
7317 return void_type_node
;
7320 else /* It's a constructor. */
7324 /* ISO C++ 12.1. A constructor may not be
7325 declared const or volatile. A constructor may
7326 not be virtual. A constructor may not be
7329 error ("constructor cannot be static member function");
7332 pedwarn ("constructors cannot be declared virtual");
7337 error ("constructors may not be cv-qualified");
7338 quals
= TYPE_UNQUALIFIED
;
7340 if (decl_context
== FIELD
)
7342 if (! member_function_or_else (ctype
,
7345 return void_type_node
;
7346 TYPE_HAS_CONSTRUCTOR (ctype
) = 1;
7347 if (sfk
!= sfk_constructor
)
7351 if (decl_context
== FIELD
)
7357 error ("can't initialize friend function %qs", name
);
7360 /* Cannot be both friend and virtual. */
7361 error ("virtual functions cannot be friends");
7364 if (decl_context
== NORMAL
)
7365 error ("friend declaration not in class definition");
7366 if (current_function_decl
&& funcdef_flag
)
7367 error ("can't define friend function %qs in a local "
7372 arg_types
= grokparms (declarator
->u
.function
.parameters
,
7375 if (inner_declarator
7376 && inner_declarator
->kind
== cdk_id
7377 && inner_declarator
->u
.id
.sfk
== sfk_destructor
7378 && arg_types
!= void_list_node
)
7380 error ("destructors may not have parameters");
7381 arg_types
= void_list_node
;
7385 type
= build_function_type (type
, arg_types
);
7392 /* Filter out pointers-to-references and references-to-references.
7393 We can get these if a TYPE_DECL is used. */
7395 if (TREE_CODE (type
) == REFERENCE_TYPE
)
7397 error (declarator
->kind
== cdk_reference
7398 ? "cannot declare reference to %q#T"
7399 : "cannot declare pointer to %q#T", type
);
7400 type
= TREE_TYPE (type
);
7402 else if (VOID_TYPE_P (type
))
7404 if (declarator
->kind
== cdk_reference
)
7405 error ("cannot declare reference to %q#T", type
);
7406 else if (declarator
->kind
== cdk_ptrmem
)
7407 error ("cannot declare pointer to %q#T member", type
);
7410 /* We now know that the TYPE_QUALS don't apply to the decl,
7411 but to the target of the pointer. */
7412 type_quals
= TYPE_UNQUALIFIED
;
7414 if (declarator
->kind
== cdk_ptrmem
7415 && (TREE_CODE (type
) == FUNCTION_TYPE
7416 || (quals
&& TREE_CODE (type
) == METHOD_TYPE
)))
7418 tree dummy
= build_decl (TYPE_DECL
, NULL_TREE
, type
);
7419 grok_method_quals (declarator
->u
.pointer
.class_type
,
7421 type
= TREE_TYPE (dummy
);
7422 quals
= TYPE_UNQUALIFIED
;
7425 if (declarator
->kind
== cdk_reference
)
7427 if (!VOID_TYPE_P (type
))
7428 type
= build_reference_type (type
);
7430 else if (TREE_CODE (type
) == METHOD_TYPE
)
7431 type
= build_ptrmemfunc_type (build_pointer_type (type
));
7432 else if (declarator
->kind
== cdk_ptrmem
)
7434 /* We might have parsed a namespace as the class type. */
7435 if (TREE_CODE (declarator
->u
.pointer
.class_type
)
7438 error ("%qD is a namespace",
7439 declarator
->u
.pointer
.class_type
);
7440 type
= build_pointer_type (type
);
7443 type
= build_ptrmem_type (declarator
->u
.pointer
.class_type
,
7447 type
= build_pointer_type (type
);
7449 /* Process a list of type modifier keywords (such as
7450 const or volatile) that were given inside the `*' or `&'. */
7452 if (declarator
->u
.pointer
.qualifiers
)
7455 = cp_build_qualified_type (type
,
7456 declarator
->u
.pointer
.qualifiers
);
7457 type_quals
= cp_type_quals (type
);
7470 if (unqualified_id
&& TREE_CODE (unqualified_id
) == TEMPLATE_ID_EXPR
7471 && TREE_CODE (type
) != FUNCTION_TYPE
7472 && TREE_CODE (type
) != METHOD_TYPE
)
7474 error ("template-id %qD used as a declarator",
7476 unqualified_id
= dname
;
7479 /* If DECLARATOR is non-NULL, we know it is a cdk_id declarator;
7480 otherwise, we would not have exited the loop above. */
7482 && TREE_CODE (declarator
->u
.id
.name
) == SCOPE_REF
7483 /* If the qualifying scope was invalid, it will have been set to
7485 && TREE_OPERAND (declarator
->u
.id
.name
, 0)
7486 && TYPE_P (TREE_OPERAND (declarator
->u
.id
.name
, 0)))
7490 ctype
= TREE_OPERAND (declarator
->u
.id
.name
, 0);
7492 ctype
= TYPE_MAIN_VARIANT (ctype
);
7494 while (t
!= NULL_TREE
&& CLASS_TYPE_P (t
))
7496 /* You're supposed to have one `template <...>' for every
7497 template class, but you don't need one for a full
7498 specialization. For example:
7500 template <class T> struct S{};
7501 template <> struct S<int> { void f(); };
7502 void S<int>::f () {}
7504 is correct; there shouldn't be a `template <>' for the
7505 definition of `S<int>::f'. */
7506 if (CLASSTYPE_TEMPLATE_INFO (t
)
7507 && (CLASSTYPE_TEMPLATE_INSTANTIATION (t
)
7508 || uses_template_parms (CLASSTYPE_TI_ARGS (t
)))
7509 && PRIMARY_TEMPLATE_P (CLASSTYPE_TI_TEMPLATE (t
)))
7510 template_count
+= 1;
7512 t
= TYPE_MAIN_DECL (t
);
7513 t
= DECL_CONTEXT (t
);
7516 if (ctype
== current_class_type
)
7522 Is this ill-formed? */
7525 pedwarn ("extra qualification %<%T::%> on member %qs ignored",
7528 else if (TREE_CODE (type
) == FUNCTION_TYPE
)
7530 tree sname
= TREE_OPERAND (declarator
->u
.id
.name
, 1);
7532 if (TREE_CODE (sname
) == IDENTIFIER_NODE
7533 && NEW_DELETE_OPNAME_P (sname
))
7534 /* Overloaded operator new and operator delete
7535 are always static functions. */
7537 else if (current_class_type
== NULL_TREE
|| friendp
)
7539 = build_method_type_directly (ctype
,
7541 TYPE_ARG_TYPES (type
));
7544 error ("cannot declare member function %<%T::%s%> within %<%T%>",
7545 ctype
, name
, current_class_type
);
7546 return error_mark_node
;
7549 else if (declspecs
->specs
[(int)ds_typedef
]
7550 || COMPLETE_TYPE_P (complete_type (ctype
)))
7552 /* Have to move this code elsewhere in this function.
7553 this code is used for i.e., typedef int A::M; M *pm;
7555 It is? How? jason 10/2/94 */
7557 if (current_class_type
)
7559 error ("cannot declare member %<%T::%s%> within %qT",
7560 ctype
, name
, current_class_type
);
7561 return void_type_node
;
7566 cxx_incomplete_type_error (NULL_TREE
, ctype
);
7567 return error_mark_node
;
7574 *attrlist
= chainon (returned_attrs
, *attrlist
);
7576 attrlist
= &returned_attrs
;
7579 /* Now TYPE has the actual type. */
7581 /* Did array size calculations overflow? */
7583 if (TREE_CODE (type
) == ARRAY_TYPE
7584 && COMPLETE_TYPE_P (type
)
7585 && TREE_OVERFLOW (TYPE_SIZE (type
)))
7587 error ("size of array %qs is too large", name
);
7588 /* If we proceed with the array type as it is, we'll eventually
7589 crash in tree_low_cst(). */
7590 type
= error_mark_node
;
7593 if ((decl_context
== FIELD
|| decl_context
== PARM
)
7594 && !processing_template_decl
7595 && variably_modified_type_p (type
, NULL_TREE
))
7597 if (decl_context
== FIELD
)
7598 error ("data member may not have variably modified type %qT", type
);
7600 error ("parameter may not have variably modified type %qT", type
);
7601 type
= error_mark_node
;
7604 if (explicitp
== 1 || (explicitp
&& friendp
))
7606 /* [dcl.fct.spec] The explicit specifier shall only be used in
7607 declarations of constructors within a class definition. */
7608 error ("only declarations of constructors can be %<explicit%>");
7612 if (storage_class
== sc_mutable
)
7614 if (decl_context
!= FIELD
|| friendp
)
7616 error ("non-member %qs cannot be declared %<mutable%>", name
);
7617 storage_class
= sc_none
;
7619 else if (decl_context
== TYPENAME
|| declspecs
->specs
[(int)ds_typedef
])
7621 error ("non-object member %qs cannot be declared %<mutable%>", name
);
7622 storage_class
= sc_none
;
7624 else if (TREE_CODE (type
) == FUNCTION_TYPE
7625 || TREE_CODE (type
) == METHOD_TYPE
)
7627 error ("function %qs cannot be declared %<mutable%>", name
);
7628 storage_class
= sc_none
;
7632 error ("static %qs cannot be declared %<mutable%>", name
);
7633 storage_class
= sc_none
;
7635 else if (type_quals
& TYPE_QUAL_CONST
)
7637 error ("const %qs cannot be declared %<mutable%>", name
);
7638 storage_class
= sc_none
;
7642 /* If this is declaring a typedef name, return a TYPE_DECL. */
7643 if (declspecs
->specs
[(int)ds_typedef
] && decl_context
!= TYPENAME
)
7647 /* Note that the grammar rejects storage classes
7648 in typenames, fields or parameters. */
7649 if (current_lang_name
== lang_name_java
)
7650 TYPE_FOR_JAVA (type
) = 1;
7652 if (decl_context
== FIELD
)
7654 if (constructor_name_p (unqualified_id
, current_class_type
))
7655 pedwarn ("ISO C++ forbids nested type %qD with same name "
7656 "as enclosing class",
7658 decl
= build_lang_decl (TYPE_DECL
, unqualified_id
, type
);
7662 decl
= build_decl (TYPE_DECL
, unqualified_id
, type
);
7663 if (in_namespace
|| ctype
)
7664 error ("%Jtypedef name may not be a nested-name-specifier", decl
);
7665 if (!current_function_decl
)
7666 DECL_CONTEXT (decl
) = FROB_CONTEXT (current_namespace
);
7667 else if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (current_function_decl
)
7668 || (DECL_MAYBE_IN_CHARGE_DESTRUCTOR_P
7669 (current_function_decl
)))
7670 /* The TYPE_DECL is "abstract" because there will be
7671 clones of this constructor/destructor, and there will
7672 be copies of this TYPE_DECL generated in those
7674 DECL_ABSTRACT (decl
) = 1;
7677 /* If the user declares "typedef struct {...} foo" then the
7678 struct will have an anonymous name. Fill that name in now.
7679 Nothing can refer to it, so nothing needs know about the name
7681 if (type
!= error_mark_node
7684 && TREE_CODE (TYPE_NAME (type
)) == TYPE_DECL
7685 && TYPE_ANONYMOUS_P (type
)
7686 /* Don't do this if there are attributes. */
7687 && (!attrlist
|| !*attrlist
)
7688 && cp_type_quals (type
) == TYPE_UNQUALIFIED
)
7690 tree oldname
= TYPE_NAME (type
);
7693 /* Replace the anonymous name with the real name everywhere. */
7694 for (t
= TYPE_MAIN_VARIANT (type
); t
; t
= TYPE_NEXT_VARIANT (t
))
7695 if (TYPE_NAME (t
) == oldname
)
7696 TYPE_NAME (t
) = decl
;
7698 if (TYPE_LANG_SPECIFIC (type
))
7699 TYPE_WAS_ANONYMOUS (type
) = 1;
7701 /* If this is a typedef within a template class, the nested
7702 type is a (non-primary) template. The name for the
7703 template needs updating as well. */
7704 if (TYPE_LANG_SPECIFIC (type
) && CLASSTYPE_TEMPLATE_INFO (type
))
7705 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type
))
7706 = TYPE_IDENTIFIER (type
);
7708 /* FIXME remangle member functions; member functions of a
7709 type with external linkage have external linkage. */
7714 if (ctype
== NULL_TREE
)
7716 if (TREE_CODE (type
) != METHOD_TYPE
)
7717 error ("%Jinvalid type qualifier for non-member function type",
7720 ctype
= TYPE_METHOD_BASETYPE (type
);
7722 if (ctype
!= NULL_TREE
)
7723 grok_method_quals (ctype
, decl
, quals
);
7727 || (typedef_decl
&& C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl
)))
7728 C_TYPEDEF_EXPLICITLY_SIGNED (decl
) = 1;
7730 bad_specifiers (decl
, "type", virtualp
, quals
!= TYPE_UNQUALIFIED
,
7731 inlinep
, friendp
, raises
!= NULL_TREE
);
7736 /* Detect the case of an array type of unspecified size
7737 which came, as such, direct from a typedef name.
7738 We must copy the type, so that the array's domain can be
7739 individually set by the object's initializer. */
7741 if (type
&& typedef_type
7742 && TREE_CODE (type
) == ARRAY_TYPE
&& !TYPE_DOMAIN (type
)
7743 && TYPE_MAIN_VARIANT (type
) == TYPE_MAIN_VARIANT (typedef_type
))
7744 type
= build_cplus_array_type (TREE_TYPE (type
), NULL_TREE
);
7746 /* Detect where we're using a typedef of function type to declare a
7747 function. PARMS will not be set, so we must create it now. */
7749 if (type
== typedef_type
&& TREE_CODE (type
) == FUNCTION_TYPE
)
7751 tree decls
= NULL_TREE
;
7754 for (args
= TYPE_ARG_TYPES (type
); args
; args
= TREE_CHAIN (args
))
7756 tree decl
= cp_build_parm_decl (NULL_TREE
, TREE_VALUE (args
));
7758 TREE_CHAIN (decl
) = decls
;
7762 parms
= nreverse (decls
);
7765 /* If this is a type name (such as, in a cast or sizeof),
7766 compute the type and return it now. */
7768 if (decl_context
== TYPENAME
)
7770 /* Note that the grammar rejects storage classes
7771 in typenames, fields or parameters. */
7772 if (type_quals
!= TYPE_UNQUALIFIED
)
7773 type_quals
= TYPE_UNQUALIFIED
;
7775 /* Special case: "friend class foo" looks like a TYPENAME context. */
7778 if (type_quals
!= TYPE_UNQUALIFIED
)
7780 error ("type qualifiers specified for friend class declaration");
7781 type_quals
= TYPE_UNQUALIFIED
;
7785 error ("%<inline%> specified for friend class declaration");
7791 /* Don't allow friend declaration without a class-key. */
7792 if (TREE_CODE (type
) == TEMPLATE_TYPE_PARM
)
7793 pedwarn ("template parameters cannot be friends");
7794 else if (TREE_CODE (type
) == TYPENAME_TYPE
)
7795 pedwarn ("friend declaration requires class-key, "
7796 "i.e. %<friend class %T::%D%>",
7797 TYPE_CONTEXT (type
), TYPENAME_TYPE_FULLNAME (type
));
7799 pedwarn ("friend declaration requires class-key, "
7800 "i.e. %<friend %#T%>",
7804 /* Only try to do this stuff if we didn't already give up. */
7805 if (type
!= integer_type_node
)
7807 /* A friendly class? */
7808 if (current_class_type
)
7809 make_friend_class (current_class_type
, TYPE_MAIN_VARIANT (type
),
7812 error ("trying to make class %qT a friend of global scope",
7815 type
= void_type_node
;
7820 if (ctype
== NULL_TREE
)
7822 if (TREE_CODE (type
) != METHOD_TYPE
)
7823 error ("invalid qualifiers on non-member function type");
7825 ctype
= TYPE_METHOD_BASETYPE (type
);
7829 tree dummy
= build_decl (TYPE_DECL
, unqualified_id
, type
);
7830 grok_method_quals (ctype
, dummy
, quals
);
7831 type
= TREE_TYPE (dummy
);
7837 else if (unqualified_id
== NULL_TREE
&& decl_context
!= PARM
7838 && decl_context
!= CATCHPARM
7839 && TREE_CODE (type
) != UNION_TYPE
7842 error ("abstract declarator %qT used as declaration", type
);
7843 return error_mark_node
;
7846 /* Only functions may be declared using an operator-function-id. */
7848 && IDENTIFIER_OPNAME_P (unqualified_id
)
7849 && TREE_CODE (type
) != FUNCTION_TYPE
7850 && TREE_CODE (type
) != METHOD_TYPE
)
7852 error ("declaration of %qD as non-function", unqualified_id
);
7853 return error_mark_node
;
7856 /* We don't check parameter types here because we can emit a better
7857 error message later. */
7858 if (decl_context
!= PARM
)
7859 type
= check_var_type (unqualified_id
, type
);
7861 /* Now create the decl, which may be a VAR_DECL, a PARM_DECL
7862 or a FUNCTION_DECL, depending on DECL_CONTEXT and TYPE. */
7864 if (decl_context
== PARM
|| decl_context
== CATCHPARM
)
7866 if (ctype
|| in_namespace
)
7867 error ("cannot use %<::%> in parameter declaration");
7869 /* A parameter declared as an array of T is really a pointer to T.
7870 One declared as a function is really a pointer to a function.
7871 One declared as a member is really a pointer to member. */
7873 if (TREE_CODE (type
) == ARRAY_TYPE
)
7875 /* Transfer const-ness of array into that of type pointed to. */
7876 type
= build_pointer_type (TREE_TYPE (type
));
7877 type_quals
= TYPE_UNQUALIFIED
;
7879 else if (TREE_CODE (type
) == FUNCTION_TYPE
)
7880 type
= build_pointer_type (type
);
7886 if (decl_context
== PARM
)
7888 decl
= cp_build_parm_decl (unqualified_id
, type
);
7890 bad_specifiers (decl
, "parameter", virtualp
, quals
!= TYPE_UNQUALIFIED
,
7891 inlinep
, friendp
, raises
!= NULL_TREE
);
7893 else if (decl_context
== FIELD
)
7895 /* The C99 flexible array extension. */
7896 if (!staticp
&& TREE_CODE (type
) == ARRAY_TYPE
7897 && TYPE_DOMAIN (type
) == NULL_TREE
)
7899 tree itype
= compute_array_index_type (dname
, integer_zero_node
);
7900 type
= build_cplus_array_type (TREE_TYPE (type
), itype
);
7903 if (type
== error_mark_node
)
7905 /* Happens when declaring arrays of sizes which
7906 are error_mark_node, for example. */
7909 else if (in_namespace
&& !friendp
)
7911 /* Something like struct S { int N::j; }; */
7912 error ("invalid use of %<::%>");
7915 else if (TREE_CODE (type
) == FUNCTION_TYPE
)
7918 tree function_context
;
7920 /* We catch the others as conflicts with the builtin
7922 if (friendp
&& unqualified_id
== ridpointers
[(int) RID_SIGNED
])
7924 error ("function %qD cannot be declared friend",
7931 if (ctype
== NULL_TREE
)
7932 ctype
= current_class_type
;
7934 if (ctype
== NULL_TREE
)
7936 error ("can't make %qD into a method -- not in a class",
7938 return void_type_node
;
7941 /* ``A union may [ ... ] not [ have ] virtual functions.''
7943 if (virtualp
&& TREE_CODE (ctype
) == UNION_TYPE
)
7945 error ("function %qD declared virtual inside a union",
7947 return void_type_node
;
7950 if (NEW_DELETE_OPNAME_P (unqualified_id
))
7954 error ("%qD cannot be declared virtual, since it "
7960 else if (staticp
< 2)
7961 type
= build_method_type_directly (ctype
,
7963 TYPE_ARG_TYPES (type
));
7966 /* Tell grokfndecl if it needs to set TREE_PUBLIC on the node. */
7967 function_context
= (ctype
!= NULL_TREE
) ?
7968 decl_function_context (TYPE_MAIN_DECL (ctype
)) : NULL_TREE
;
7969 publicp
= (! friendp
|| ! staticp
)
7970 && function_context
== NULL_TREE
;
7971 decl
= grokfndecl (ctype
, type
,
7972 TREE_CODE (unqualified_id
) != TEMPLATE_ID_EXPR
7973 ? unqualified_id
: dname
,
7976 virtualp
, flags
, quals
, raises
,
7977 friendp
? -1 : 0, friendp
, publicp
, inlinep
,
7978 funcdef_flag
, template_count
, in_namespace
, attrlist
);
7979 if (decl
== NULL_TREE
)
7982 /* This clobbers the attrs stored in `decl' from `attrlist'. */
7983 /* The decl and setting of decl_attr is also turned off. */
7984 decl
= build_decl_attribute_variant (decl
, decl_attr
);
7987 /* [class.conv.ctor]
7989 A constructor declared without the function-specifier
7990 explicit that can be called with a single parameter
7991 specifies a conversion from the type of its first
7992 parameter to the type of its class. Such a constructor
7993 is called a converting constructor. */
7995 DECL_NONCONVERTING_P (decl
) = 1;
7996 else if (DECL_CONSTRUCTOR_P (decl
))
7998 /* The constructor can be called with exactly one
7999 parameter if there is at least one parameter, and
8000 any subsequent parameters have default arguments.
8001 Ignore any compiler-added parms. */
8002 tree arg_types
= FUNCTION_FIRST_USER_PARMTYPE (decl
);
8004 if (arg_types
== void_list_node
8006 && TREE_CHAIN (arg_types
)
8007 && TREE_CHAIN (arg_types
) != void_list_node
8008 && !TREE_PURPOSE (TREE_CHAIN (arg_types
))))
8009 DECL_NONCONVERTING_P (decl
) = 1;
8012 else if (TREE_CODE (type
) == METHOD_TYPE
)
8014 /* We only get here for friend declarations of
8015 members of other classes. */
8016 /* All method decls are public, so tell grokfndecl to set
8017 TREE_PUBLIC, also. */
8018 decl
= grokfndecl (ctype
, type
,
8019 TREE_CODE (unqualified_id
) != TEMPLATE_ID_EXPR
8020 ? unqualified_id
: dname
,
8023 virtualp
, flags
, quals
, raises
,
8024 friendp
? -1 : 0, friendp
, 1, 0, funcdef_flag
,
8025 template_count
, in_namespace
, attrlist
);
8026 if (decl
== NULL_TREE
)
8029 else if (!staticp
&& !dependent_type_p (type
)
8030 && !COMPLETE_TYPE_P (complete_type (type
))
8031 && (TREE_CODE (type
) != ARRAY_TYPE
|| initialized
== 0))
8034 error ("field %qD has incomplete type", unqualified_id
);
8036 error ("name %qT has incomplete type", type
);
8038 /* If we're instantiating a template, tell them which
8039 instantiation made the field's type be incomplete. */
8040 if (current_class_type
8041 && TYPE_NAME (current_class_type
)
8042 && IDENTIFIER_TEMPLATE (TYPE_IDENTIFIER (current_class_type
))
8044 && declspecs
->type
== type
)
8045 error (" in instantiation of template %qT",
8046 current_class_type
);
8048 type
= error_mark_node
;
8055 error ("%qE is neither function nor member function; "
8056 "cannot be declared friend", unqualified_id
);
8064 /* Friends are treated specially. */
8065 if (ctype
== current_class_type
)
8066 warning ("member functions are implicitly friends of their class");
8067 else if (decl
&& DECL_NAME (decl
))
8069 if (template_class_depth (current_class_type
) == 0)
8071 decl
= check_explicit_specialization
8072 (unqualified_id
, decl
, template_count
,
8073 2 * (funcdef_flag
!= 0) + 4);
8074 if (decl
== error_mark_node
)
8075 return error_mark_node
;
8078 decl
= do_friend (ctype
, unqualified_id
, decl
,
8079 *attrlist
, flags
, quals
, funcdef_flag
);
8083 return void_type_node
;
8086 /* Structure field. It may not be a function, except for C++. */
8088 if (decl
== NULL_TREE
)
8094 /* An attempt is being made to initialize a non-static
8095 member. But, from [class.mem]:
8097 4 A member-declarator can contain a
8098 constant-initializer only if it declares a static
8099 member (_class.static_) of integral or enumeration
8100 type, see _class.static.data_.
8102 This used to be relatively common practice, but
8103 the rest of the compiler does not correctly
8104 handle the initialization unless the member is
8105 static so we make it static below. */
8106 pedwarn ("ISO C++ forbids initialization of member %qD",
8108 pedwarn ("making %qD static", unqualified_id
);
8112 if (uses_template_parms (type
))
8113 /* We'll check at instantiation time. */
8115 else if (check_static_variable_definition (unqualified_id
,
8117 /* If we just return the declaration, crashes
8118 will sometimes occur. We therefore return
8119 void_type_node, as if this was a friend
8120 declaration, to cause callers to completely
8121 ignore this declaration. */
8122 return void_type_node
;
8127 /* C++ allows static class members. All other work
8128 for this is done by grokfield. */
8129 decl
= build_lang_decl (VAR_DECL
, unqualified_id
, type
);
8130 set_linkage_for_static_data_member (decl
);
8131 /* Even if there is an in-class initialization, DECL
8132 is considered undefined until an out-of-class
8133 definition is provided. */
8134 DECL_EXTERNAL (decl
) = 1;
8138 decl
= build_decl (FIELD_DECL
, unqualified_id
, type
);
8139 DECL_NONADDRESSABLE_P (decl
) = bitfield
;
8140 if (storage_class
== sc_mutable
)
8142 DECL_MUTABLE_P (decl
) = 1;
8143 storage_class
= sc_none
;
8147 bad_specifiers (decl
, "field", virtualp
, quals
!= TYPE_UNQUALIFIED
,
8148 inlinep
, friendp
, raises
!= NULL_TREE
);
8151 else if (TREE_CODE (type
) == FUNCTION_TYPE
8152 || TREE_CODE (type
) == METHOD_TYPE
)
8157 if (!unqualified_id
)
8160 if (TREE_CODE (unqualified_id
) == TEMPLATE_ID_EXPR
)
8161 original_name
= dname
;
8163 original_name
= unqualified_id
;
8165 if (storage_class
== sc_auto
)
8166 error ("storage class %<auto%> invalid for function %qs", name
);
8167 else if (storage_class
== sc_register
)
8168 error ("storage class %<register%> invalid for function %qs", name
);
8170 error ("storage class %<__thread%> invalid for function %qs", name
);
8172 /* Function declaration not at top level.
8173 Storage classes other than `extern' are not allowed
8174 and `extern' makes no difference. */
8175 if (! toplevel_bindings_p ()
8176 && (storage_class
== sc_static
8177 || declspecs
->specs
[(int)ds_inline
])
8180 if (storage_class
== sc_static
)
8181 pedwarn ("%<static%> specified invalid for function %qs "
8182 "declared out of global scope", name
);
8184 pedwarn ("%<inline%> specifier invalid for function %qs "
8185 "declared out of global scope", name
);
8188 if (ctype
== NULL_TREE
)
8192 error ("virtual non-class function %qs", name
);
8196 else if (TREE_CODE (type
) == FUNCTION_TYPE
&& staticp
< 2
8197 && !NEW_DELETE_OPNAME_P (original_name
))
8198 type
= build_method_type_directly (ctype
,
8200 TYPE_ARG_TYPES (type
));
8202 /* Record presence of `static'. */
8203 publicp
= (ctype
!= NULL_TREE
8204 || storage_class
== sc_extern
8205 || storage_class
!= sc_static
);
8207 decl
= grokfndecl (ctype
, type
, original_name
, parms
, unqualified_id
,
8208 virtualp
, flags
, quals
, raises
,
8210 publicp
, inlinep
, funcdef_flag
,
8211 template_count
, in_namespace
, attrlist
);
8212 if (decl
== NULL_TREE
)
8217 int invalid_static
= 0;
8219 /* Don't allow a static member function in a class, and forbid
8220 declaring main to be static. */
8221 if (TREE_CODE (type
) == METHOD_TYPE
)
8223 pedwarn ("cannot declare member function %qD to have "
8224 "static linkage", decl
);
8227 else if (current_function_decl
)
8229 /* FIXME need arm citation */
8230 error ("cannot declare static function inside another function");
8237 storage_class
= sc_none
;
8243 /* It's a variable. */
8245 /* An uninitialized decl with `extern' is a reference. */
8246 decl
= grokvardecl (type
, unqualified_id
,
8249 (type_quals
& TYPE_QUAL_CONST
) != 0,
8250 ctype
? ctype
: in_namespace
);
8251 bad_specifiers (decl
, "variable", virtualp
, quals
!= TYPE_UNQUALIFIED
,
8252 inlinep
, friendp
, raises
!= NULL_TREE
);
8256 DECL_CONTEXT (decl
) = ctype
;
8259 pedwarn ("%<static%> may not be used when defining "
8260 "(as opposed to declaring) a static data member");
8262 storage_class
= sc_none
;
8264 if (storage_class
== sc_register
&& TREE_STATIC (decl
))
8266 error ("static member %qD declared %<register%>", decl
);
8267 storage_class
= sc_none
;
8269 if (storage_class
== sc_extern
&& pedantic
)
8271 pedwarn ("cannot explicitly declare member %q#D to have "
8274 storage_class
= sc_none
;
8279 /* Record `register' declaration for warnings on &
8280 and in case doing stupid register allocation. */
8282 if (storage_class
== sc_register
)
8283 DECL_REGISTER (decl
) = 1;
8284 else if (storage_class
== sc_extern
)
8285 DECL_THIS_EXTERN (decl
) = 1;
8286 else if (storage_class
== sc_static
)
8287 DECL_THIS_STATIC (decl
) = 1;
8289 /* Record constancy and volatility. There's no need to do this
8290 when processing a template; we'll do this for the instantiated
8291 declaration based on the type of DECL. */
8292 if (!processing_template_decl
)
8293 c_apply_type_quals_to_decl (type_quals
, decl
);
8299 /* Subroutine of start_function. Ensure that each of the parameter
8300 types (as listed in PARMS) is complete, as is required for a
8301 function definition. */
8304 require_complete_types_for_parms (tree parms
)
8306 for (; parms
; parms
= TREE_CHAIN (parms
))
8308 if (dependent_type_p (TREE_TYPE (parms
)))
8310 if (VOID_TYPE_P (TREE_TYPE (parms
)))
8311 /* grokparms will have already issued an error. */
8312 TREE_TYPE (parms
) = error_mark_node
;
8313 else if (complete_type_or_else (TREE_TYPE (parms
), parms
))
8315 layout_decl (parms
, 0);
8316 DECL_ARG_TYPE (parms
) = type_passed_as (TREE_TYPE (parms
));
8321 /* Returns nonzero if T is a local variable. */
8324 local_variable_p (tree t
)
8326 if ((TREE_CODE (t
) == VAR_DECL
8327 /* A VAR_DECL with a context that is a _TYPE is a static data
8329 && !TYPE_P (CP_DECL_CONTEXT (t
))
8330 /* Any other non-local variable must be at namespace scope. */
8331 && !DECL_NAMESPACE_SCOPE_P (t
))
8332 || (TREE_CODE (t
) == PARM_DECL
))
8338 /* Returns nonzero if T is an automatic local variable or a label.
8339 (These are the declarations that need to be remapped when the code
8340 containing them is duplicated.) */
8343 nonstatic_local_decl_p (tree t
)
8345 return ((local_variable_p (t
) && !TREE_STATIC (t
))
8346 || TREE_CODE (t
) == LABEL_DECL
8347 || TREE_CODE (t
) == RESULT_DECL
);
8350 /* Like local_variable_p, but suitable for use as a tree-walking
8354 local_variable_p_walkfn (tree
*tp
, int *walk_subtrees
,
8355 void *data ATTRIBUTE_UNUSED
)
8357 if (local_variable_p (*tp
) && !DECL_ARTIFICIAL (*tp
))
8359 else if (TYPE_P (*tp
))
8366 /* Check that ARG, which is a default-argument expression for a
8367 parameter DECL, is valid. Returns ARG, or ERROR_MARK_NODE, if
8368 something goes wrong. DECL may also be a _TYPE node, rather than a
8369 DECL, if there is no DECL available. */
8372 check_default_argument (tree decl
, tree arg
)
8377 if (TREE_CODE (arg
) == DEFAULT_ARG
)
8378 /* We get a DEFAULT_ARG when looking at an in-class declaration
8379 with a default argument. Ignore the argument for now; we'll
8380 deal with it after the class is complete. */
8383 if (processing_template_decl
|| uses_template_parms (arg
))
8384 /* We don't do anything checking until instantiation-time. Note
8385 that there may be uninstantiated arguments even for an
8386 instantiated function, since default arguments are not
8387 instantiated until they are needed. */
8396 decl_type
= TREE_TYPE (decl
);
8398 if (arg
== error_mark_node
8399 || decl
== error_mark_node
8400 || TREE_TYPE (arg
) == error_mark_node
8401 || decl_type
== error_mark_node
)
8402 /* Something already went wrong. There's no need to check
8404 return error_mark_node
;
8406 /* [dcl.fct.default]
8408 A default argument expression is implicitly converted to the
8410 if (!TREE_TYPE (arg
)
8411 || !can_convert_arg (decl_type
, TREE_TYPE (arg
), arg
))
8414 error ("default argument for %q#D has type %qT",
8415 decl
, TREE_TYPE (arg
));
8417 error ("default argument for parameter of type %qT has type %qT",
8418 decl_type
, TREE_TYPE (arg
));
8420 return error_mark_node
;
8423 /* [dcl.fct.default]
8425 Local variables shall not be used in default argument
8428 The keyword `this' shall not be used in a default argument of a
8430 var
= walk_tree_without_duplicates (&arg
, local_variable_p_walkfn
,
8434 error ("default argument %qE uses local variable %qD", arg
, var
);
8435 return error_mark_node
;
8442 /* Decode the list of parameter types for a function type.
8443 Given the list of things declared inside the parens,
8444 return a list of types.
8446 If this parameter does not end with an ellipsis, we append
8449 *PARMS is set to the chain of PARM_DECLs created. */
8452 grokparms (cp_parameter_declarator
*first_parm
, tree
*parms
)
8454 tree result
= NULL_TREE
;
8455 tree decls
= NULL_TREE
;
8456 int ellipsis
= !first_parm
|| first_parm
->ellipsis_p
;
8457 cp_parameter_declarator
*parm
;
8460 for (parm
= first_parm
; parm
!= NULL
; parm
= parm
->next
)
8462 tree type
= NULL_TREE
;
8463 tree init
= parm
->default_argument
;
8467 if (parm
== no_parameters
)
8470 attrs
= parm
->decl_specifiers
.attributes
;
8471 parm
->decl_specifiers
.attributes
= NULL_TREE
;
8472 decl
= grokdeclarator (parm
->declarator
, &parm
->decl_specifiers
,
8473 PARM
, init
!= NULL_TREE
, &attrs
);
8474 if (! decl
|| TREE_TYPE (decl
) == error_mark_node
)
8478 cplus_decl_attributes (&decl
, attrs
, 0);
8480 type
= TREE_TYPE (decl
);
8481 if (VOID_TYPE_P (type
))
8483 if (same_type_p (type
, void_type_node
)
8484 && !DECL_NAME (decl
) && !result
&& !parm
->next
&& !ellipsis
)
8485 /* this is a parmlist of `(void)', which is ok. */
8487 cxx_incomplete_type_error (decl
, type
);
8488 /* It's not a good idea to actually create parameters of
8489 type `void'; other parts of the compiler assume that a
8490 void type terminates the parameter list. */
8491 type
= error_mark_node
;
8492 TREE_TYPE (decl
) = error_mark_node
;
8495 if (type
!= error_mark_node
)
8497 /* Top-level qualifiers on the parameters are
8498 ignored for function types. */
8499 type
= cp_build_qualified_type (type
, 0);
8500 if (TREE_CODE (type
) == METHOD_TYPE
)
8502 error ("parameter %qD invalidly declared method type", decl
);
8503 type
= build_pointer_type (type
);
8504 TREE_TYPE (decl
) = type
;
8506 else if (abstract_virtuals_error (decl
, type
))
8507 any_error
= 1; /* Seems like a good idea. */
8508 else if (POINTER_TYPE_P (type
))
8510 /* [dcl.fct]/6, parameter types cannot contain pointers
8511 (references) to arrays of unknown bound. */
8512 tree t
= TREE_TYPE (type
);
8513 int ptr
= TYPE_PTR_P (type
);
8519 else if (TREE_CODE (t
) != ARRAY_TYPE
)
8521 else if (!TYPE_DOMAIN (t
))
8525 if (TREE_CODE (t
) == ARRAY_TYPE
)
8526 error ("parameter %qD includes %s to array of unknown "
8528 decl
, ptr
? "pointer" : "reference", t
);
8531 if (!any_error
&& init
)
8532 init
= check_default_argument (decl
, init
);
8537 TREE_CHAIN (decl
) = decls
;
8539 result
= tree_cons (init
, type
, result
);
8541 decls
= nreverse (decls
);
8542 result
= nreverse (result
);
8544 result
= chainon (result
, void_list_node
);
8551 /* D is a constructor or overloaded `operator='.
8553 Let T be the class in which D is declared. Then, this function
8556 -1 if D's is an ill-formed constructor or copy assignment operator
8557 whose first parameter is of type `T'.
8558 0 if D is not a copy constructor or copy assignment
8560 1 if D is a copy constructor or copy assignment operator whose
8561 first parameter is a reference to const qualified T.
8562 2 if D is a copy constructor or copy assignment operator whose
8563 first parameter is a reference to non-const qualified T.
8565 This function can be used as a predicate. Positive values indicate
8566 a copy constructor and nonzero values indicate a copy assignment
8576 gcc_assert (DECL_FUNCTION_MEMBER_P (d
));
8578 if (DECL_TEMPLATE_INFO (d
)
8579 && DECL_MEMBER_TEMPLATE_P (DECL_TI_TEMPLATE (d
)))
8580 /* Instantiations of template member functions are never copy
8581 functions. Note that member functions of templated classes are
8582 represented as template functions internally, and we must
8583 accept those as copy functions. */
8586 args
= FUNCTION_FIRST_USER_PARMTYPE (d
);
8590 arg_type
= TREE_VALUE (args
);
8592 if (TYPE_MAIN_VARIANT (arg_type
) == DECL_CONTEXT (d
))
8594 /* Pass by value copy assignment operator. */
8597 else if (TREE_CODE (arg_type
) == REFERENCE_TYPE
8598 && TYPE_MAIN_VARIANT (TREE_TYPE (arg_type
)) == DECL_CONTEXT (d
))
8600 if (CP_TYPE_CONST_P (TREE_TYPE (arg_type
)))
8606 args
= TREE_CHAIN (args
);
8608 if (args
&& args
!= void_list_node
&& !TREE_PURPOSE (args
))
8609 /* There are more non-optional args. */
8615 /* Remember any special properties of member function DECL. */
8617 void grok_special_member_properties (tree decl
)
8619 if (!DECL_NONSTATIC_MEMBER_FUNCTION_P(decl
))
8620 ; /* Not special. */
8621 else if (DECL_CONSTRUCTOR_P (decl
))
8623 int ctor
= copy_fn_p (decl
);
8629 A non-template constructor for class X is a copy
8630 constructor if its first parameter is of type X&, const
8631 X&, volatile X& or const volatile X&, and either there
8632 are no other parameters or else all other parameters have
8633 default arguments. */
8634 TYPE_HAS_INIT_REF (DECL_CONTEXT (decl
)) = 1;
8636 TYPE_HAS_CONST_INIT_REF (DECL_CONTEXT (decl
)) = 1;
8638 else if (sufficient_parms_p (FUNCTION_FIRST_USER_PARMTYPE (decl
)))
8639 TYPE_HAS_DEFAULT_CONSTRUCTOR (DECL_CONTEXT (decl
)) = 1;
8641 else if (DECL_OVERLOADED_OPERATOR_P (decl
) == NOP_EXPR
)
8645 A non-template assignment operator for class X is a copy
8646 assignment operator if its parameter is of type X, X&, const
8647 X&, volatile X& or const volatile X&. */
8649 int assop
= copy_fn_p (decl
);
8653 TYPE_HAS_ASSIGN_REF (DECL_CONTEXT (decl
)) = 1;
8655 TYPE_HAS_CONST_ASSIGN_REF (DECL_CONTEXT (decl
)) = 1;
8660 /* Check a constructor DECL has the correct form. Complains
8661 if the class has a constructor of the form X(X). */
8664 grok_ctor_properties (tree ctype
, tree decl
)
8666 int ctor_parm
= copy_fn_p (decl
);
8672 A declaration of a constructor for a class X is ill-formed if
8673 its first parameter is of type (optionally cv-qualified) X
8674 and either there are no other parameters or else all other
8675 parameters have default arguments.
8677 We *don't* complain about member template instantiations that
8678 have this form, though; they can occur as we try to decide
8679 what constructor to use during overload resolution. Since
8680 overload resolution will never prefer such a constructor to
8681 the non-template copy constructor (which is either explicitly
8682 or implicitly defined), there's no need to worry about their
8683 existence. Theoretically, they should never even be
8684 instantiated, but that's hard to forestall. */
8685 error ("invalid constructor; you probably meant %<%T (const %T&)%>",
8693 /* An operator with this code is unary, but can also be binary. */
8696 ambi_op_p (enum tree_code code
)
8698 return (code
== INDIRECT_REF
8699 || code
== ADDR_EXPR
8700 || code
== CONVERT_EXPR
8701 || code
== NEGATE_EXPR
8702 || code
== PREINCREMENT_EXPR
8703 || code
== PREDECREMENT_EXPR
);
8706 /* An operator with this name can only be unary. */
8709 unary_op_p (enum tree_code code
)
8711 return (code
== TRUTH_NOT_EXPR
8712 || code
== BIT_NOT_EXPR
8713 || code
== COMPONENT_REF
8714 || code
== TYPE_EXPR
);
8717 /* DECL is a declaration for an overloaded operator. Returns true if
8718 the declaration is valid; false otherwise. If COMPLAIN is true,
8719 errors are issued for invalid declarations. */
8722 grok_op_properties (tree decl
, int friendp
, bool complain
)
8724 tree argtypes
= TYPE_ARG_TYPES (TREE_TYPE (decl
));
8726 int methodp
= (TREE_CODE (TREE_TYPE (decl
)) == METHOD_TYPE
);
8727 tree name
= DECL_NAME (decl
);
8728 enum tree_code operator_code
;
8732 /* Assume that the declaration is valid. */
8735 /* Count the number of arguments. */
8736 for (argtype
= argtypes
, arity
= 0;
8737 argtype
&& argtype
!= void_list_node
;
8738 argtype
= TREE_CHAIN (argtype
))
8741 if (current_class_type
== NULL_TREE
)
8744 if (DECL_CONV_FN_P (decl
))
8745 operator_code
= TYPE_EXPR
;
8749 #define DEF_OPERATOR(NAME, CODE, MANGLING, ARITY, ASSN_P) \
8750 if (ansi_opname (CODE) == name) \
8752 operator_code = (CODE); \
8755 else if (ansi_assopname (CODE) == name) \
8757 operator_code = (CODE); \
8758 DECL_ASSIGNMENT_OPERATOR_P (decl) = 1; \
8762 #include "operators.def"
8768 gcc_assert (operator_code
!= LAST_CPLUS_TREE_CODE
);
8769 SET_OVERLOADED_OPERATOR_CODE (decl
, operator_code
);
8773 switch (operator_code
)
8776 TYPE_HAS_NEW_OPERATOR (current_class_type
) = 1;
8780 TYPE_GETS_DELETE (current_class_type
) |= 1;
8784 TYPE_HAS_ARRAY_NEW_OPERATOR (current_class_type
) = 1;
8787 case VEC_DELETE_EXPR
:
8788 TYPE_GETS_DELETE (current_class_type
) |= 2;
8796 /* [basic.std.dynamic.allocation]/1:
8798 A program is ill-formed if an allocation function is declared
8799 in a namespace scope other than global scope or declared static
8802 The same also holds true for deallocation functions. */
8803 if (operator_code
== NEW_EXPR
|| operator_code
== VEC_NEW_EXPR
8804 || operator_code
== DELETE_EXPR
|| operator_code
== VEC_DELETE_EXPR
)
8806 if (DECL_NAMESPACE_SCOPE_P (decl
))
8808 if (CP_DECL_CONTEXT (decl
) != global_namespace
)
8809 error ("%qD may not be declared within a namespace", decl
);
8810 else if (!TREE_PUBLIC (decl
))
8811 error ("%qD may not be declared as static", decl
);
8815 if (operator_code
== NEW_EXPR
|| operator_code
== VEC_NEW_EXPR
)
8816 TREE_TYPE (decl
) = coerce_new_type (TREE_TYPE (decl
));
8817 else if (operator_code
== DELETE_EXPR
|| operator_code
== VEC_DELETE_EXPR
)
8818 TREE_TYPE (decl
) = coerce_delete_type (TREE_TYPE (decl
));
8821 /* An operator function must either be a non-static member function
8822 or have at least one parameter of a class, a reference to a class,
8823 an enumeration, or a reference to an enumeration. 13.4.0.6 */
8824 if (! methodp
|| DECL_STATIC_FUNCTION_P (decl
))
8826 if (operator_code
== TYPE_EXPR
8827 || operator_code
== CALL_EXPR
8828 || operator_code
== COMPONENT_REF
8829 || operator_code
== ARRAY_REF
8830 || operator_code
== NOP_EXPR
)
8831 error ("%qD must be a nonstatic member function", decl
);
8836 if (DECL_STATIC_FUNCTION_P (decl
))
8837 error ("%qD must be either a non-static member "
8838 "function or a non-member function", decl
);
8840 for (p
= argtypes
; p
&& p
!= void_list_node
; p
= TREE_CHAIN (p
))
8842 tree arg
= non_reference (TREE_VALUE (p
));
8843 /* IS_AGGR_TYPE, rather than CLASS_TYPE_P, is used
8844 because these checks are performed even on
8845 template functions. */
8846 if (IS_AGGR_TYPE (arg
) || TREE_CODE (arg
) == ENUMERAL_TYPE
)
8850 if (!p
|| p
== void_list_node
)
8855 error ("%qD must have an argument of class or "
8863 /* There are no restrictions on the arguments to an overloaded
8865 if (operator_code
== CALL_EXPR
)
8868 if (IDENTIFIER_TYPENAME_P (name
) && ! DECL_TEMPLATE_INFO (decl
))
8870 tree t
= TREE_TYPE (name
);
8873 int ref
= (TREE_CODE (t
) == REFERENCE_TYPE
);
8874 const char *what
= 0;
8877 t
= TYPE_MAIN_VARIANT (TREE_TYPE (t
));
8879 if (TREE_CODE (t
) == VOID_TYPE
)
8881 else if (t
== current_class_type
)
8882 what
= "the same type";
8883 /* Don't force t to be complete here. */
8884 else if (IS_AGGR_TYPE (t
)
8885 && COMPLETE_TYPE_P (t
)
8886 && DERIVED_FROM_P (t
, current_class_type
))
8887 what
= "a base class";
8889 if (what
&& warn_conversion
)
8890 warning ("conversion to %s%s will never use a type "
8891 "conversion operator",
8892 ref
? "a reference to " : "", what
);
8895 if (operator_code
== COND_EXPR
)
8898 error ("ISO C++ prohibits overloading operator ?:");
8900 else if (ambi_op_p (operator_code
))
8903 /* We pick the one-argument operator codes by default, so
8904 we don't have to change anything. */
8906 else if (arity
== 2)
8908 /* If we thought this was a unary operator, we now know
8909 it to be a binary operator. */
8910 switch (operator_code
)
8913 operator_code
= MULT_EXPR
;
8917 operator_code
= BIT_AND_EXPR
;
8921 operator_code
= PLUS_EXPR
;
8925 operator_code
= MINUS_EXPR
;
8928 case PREINCREMENT_EXPR
:
8929 operator_code
= POSTINCREMENT_EXPR
;
8932 case PREDECREMENT_EXPR
:
8933 operator_code
= POSTDECREMENT_EXPR
;
8940 SET_OVERLOADED_OPERATOR_CODE (decl
, operator_code
);
8942 if ((operator_code
== POSTINCREMENT_EXPR
8943 || operator_code
== POSTDECREMENT_EXPR
)
8944 && ! processing_template_decl
8945 && ! same_type_p (TREE_VALUE (TREE_CHAIN (argtypes
)), integer_type_node
))
8948 error ("postfix %qD must take %<int%> as its argument",
8952 ("postfix %qD must take %<int%> as its second argument",
8959 error ("%qD must take either zero or one argument", decl
);
8961 error ("%qD must take either one or two arguments", decl
);
8964 /* More Effective C++ rule 6. */
8966 && (operator_code
== POSTINCREMENT_EXPR
8967 || operator_code
== POSTDECREMENT_EXPR
8968 || operator_code
== PREINCREMENT_EXPR
8969 || operator_code
== PREDECREMENT_EXPR
))
8971 tree arg
= TREE_VALUE (argtypes
);
8972 tree ret
= TREE_TYPE (TREE_TYPE (decl
));
8973 if (methodp
|| TREE_CODE (arg
) == REFERENCE_TYPE
)
8974 arg
= TREE_TYPE (arg
);
8975 arg
= TYPE_MAIN_VARIANT (arg
);
8976 if (operator_code
== PREINCREMENT_EXPR
8977 || operator_code
== PREDECREMENT_EXPR
)
8979 if (TREE_CODE (ret
) != REFERENCE_TYPE
8980 || !same_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (ret
)),
8982 warning ("prefix %qD should return %qT", decl
,
8983 build_reference_type (arg
));
8987 if (!same_type_p (TYPE_MAIN_VARIANT (ret
), arg
))
8988 warning ("postfix %qD should return %qT", decl
, arg
);
8992 else if (unary_op_p (operator_code
))
8997 error ("%qD must take %<void%>", decl
);
8999 error ("%qD must take exactly one argument", decl
);
9002 else /* if (binary_op_p (operator_code)) */
9007 error ("%qD must take exactly one argument", decl
);
9009 error ("%qD must take exactly two arguments", decl
);
9012 /* More Effective C++ rule 7. */
9014 && (operator_code
== TRUTH_ANDIF_EXPR
9015 || operator_code
== TRUTH_ORIF_EXPR
9016 || operator_code
== COMPOUND_EXPR
))
9017 warning ("user-defined %qD always evaluates both arguments",
9021 /* Effective C++ rule 23. */
9024 && !DECL_ASSIGNMENT_OPERATOR_P (decl
)
9025 && (operator_code
== PLUS_EXPR
9026 || operator_code
== MINUS_EXPR
9027 || operator_code
== TRUNC_DIV_EXPR
9028 || operator_code
== MULT_EXPR
9029 || operator_code
== TRUNC_MOD_EXPR
)
9030 && TREE_CODE (TREE_TYPE (TREE_TYPE (decl
))) == REFERENCE_TYPE
)
9031 warning ("%qD should return by value", decl
);
9034 for (; argtypes
&& argtypes
!= void_list_node
;
9035 argtypes
= TREE_CHAIN (argtypes
))
9036 if (TREE_PURPOSE (argtypes
))
9038 TREE_PURPOSE (argtypes
) = NULL_TREE
;
9039 if (operator_code
== POSTINCREMENT_EXPR
9040 || operator_code
== POSTDECREMENT_EXPR
)
9043 pedwarn ("%qD cannot have default arguments", decl
);
9046 error ("%qD cannot have default arguments", decl
);
9054 /* Return a string giving the keyword associate with CODE. */
9057 tag_name (enum tag_types code
)
9076 /* Name lookup in an elaborated-type-specifier (after the keyword
9077 indicated by TAG_CODE) has found the TYPE_DECL DECL. If the
9078 elaborated-type-specifier is invalid, issue a diagnostic and return
9079 error_mark_node; otherwise, return the *_TYPE to which it referred.
9080 If ALLOW_TEMPLATE_P is true, TYPE may be a class template. */
9083 check_elaborated_type_specifier (enum tag_types tag_code
,
9085 bool allow_template_p
)
9091 struct S { struct S *p; };
9093 name lookup will find the TYPE_DECL for the implicit "S::S"
9094 typedef. Adjust for that here. */
9095 if (DECL_SELF_REFERENCE_P (decl
))
9096 decl
= TYPE_NAME (TREE_TYPE (decl
));
9098 type
= TREE_TYPE (decl
);
9100 /* Check TEMPLATE_TYPE_PARM first because DECL_IMPLICIT_TYPEDEF_P
9101 is false for this case as well. */
9102 if (TREE_CODE (type
) == TEMPLATE_TYPE_PARM
)
9104 error ("using template type parameter %qT after %qs",
9105 type
, tag_name (tag_code
));
9106 return error_mark_node
;
9110 If the identifier resolves to a typedef-name or a template
9111 type-parameter, the elaborated-type-specifier is ill-formed.
9113 In other words, the only legitimate declaration to use in the
9114 elaborated type specifier is the implicit typedef created when
9115 the type is declared. */
9116 else if (!DECL_IMPLICIT_TYPEDEF_P (decl
)
9117 && tag_code
!= typename_type
)
9119 error ("using typedef-name %qD after %qs", decl
, tag_name (tag_code
));
9120 cp_error_at ("%qD has a previous declaration here", decl
);
9121 return error_mark_node
;
9123 else if (TREE_CODE (type
) != RECORD_TYPE
9124 && TREE_CODE (type
) != UNION_TYPE
9125 && tag_code
!= enum_type
9126 && tag_code
!= typename_type
)
9128 error ("%qT referred to as %qs", type
, tag_name (tag_code
));
9129 cp_error_at ("%qT has a previous declaration here", type
);
9130 return error_mark_node
;
9132 else if (TREE_CODE (type
) != ENUMERAL_TYPE
9133 && tag_code
== enum_type
9134 && tag_code
!= typename_type
)
9136 error ("%qT referred to as enum", type
);
9137 cp_error_at ("%qT has a previous declaration here", type
);
9138 return error_mark_node
;
9140 else if (!allow_template_p
9141 && TREE_CODE (type
) == RECORD_TYPE
9142 && CLASSTYPE_IS_TEMPLATE (type
))
9144 /* If a class template appears as elaborated type specifier
9145 without a template header such as:
9147 template <class T> class C {};
9148 void f(class C); // No template header here
9150 then the required template argument is missing. */
9152 error ("template argument required for %<%s %T%>",
9153 tag_name (tag_code
),
9154 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type
)));
9155 return error_mark_node
;
9161 /* Lookup NAME in elaborate type specifier in scope according to
9162 SCOPE and issue diagnostics if necessary.
9163 Return *_TYPE node upon success, NULL_TREE when the NAME is not
9164 found, and ERROR_MARK_NODE for type error. */
9167 lookup_and_check_tag (enum tag_types tag_code
, tree name
,
9168 tag_scope scope
, bool template_header_p
)
9172 if (scope
== ts_global
)
9173 decl
= lookup_name (name
, 2);
9175 decl
= lookup_type_scope (name
, scope
);
9177 if (decl
&& DECL_CLASS_TEMPLATE_P (decl
))
9178 decl
= DECL_TEMPLATE_RESULT (decl
);
9180 if (decl
&& TREE_CODE (decl
) == TYPE_DECL
)
9182 /* Look for invalid nested type:
9186 if (scope
== ts_current
&& DECL_SELF_REFERENCE_P (decl
))
9188 error ("%qD has the same name as the class in which it is "
9191 return error_mark_node
;
9194 /* Two cases we need to consider when deciding if a class
9195 template is allowed as an elaborated type specifier:
9196 1. It is a self reference to its own class.
9197 2. It comes with a template header.
9201 template <class T> class C {
9202 class C *c1; // DECL_SELF_REFERENCE_P is true
9205 template <class U> class C; // template_header_p is true
9206 template <class T> class C<T>::D {
9207 class C *c2; // DECL_SELF_REFERENCE_P is true
9210 t
= check_elaborated_type_specifier (tag_code
,
9213 | DECL_SELF_REFERENCE_P (decl
));
9220 /* Get the struct, enum or union (TAG_CODE says which) with tag NAME.
9221 Define the tag as a forward-reference if it is not defined.
9223 If a declaration is given, process it here, and report an error if
9224 multiple declarations are not identical.
9226 SCOPE is TS_CURRENT when this is also a definition. Only look in
9227 the current frame for the name (since C++ allows new names in any
9228 scope.) It is TS_WITHIN_ENCLOSING_NON_CLASS if this is a friend
9229 declaration. Only look beginning from the current scope outward up
9230 till the nearest non-class scope. Otherwise it is TS_GLOBAL.
9232 TEMPLATE_HEADER_P is true when this declaration is preceded by
9233 a set of template parameters. */
9236 xref_tag (enum tag_types tag_code
, tree name
,
9237 tag_scope scope
, bool template_header_p
)
9239 enum tree_code code
;
9241 tree context
= NULL_TREE
;
9243 timevar_push (TV_NAME_LOOKUP
);
9245 gcc_assert (TREE_CODE (name
) == IDENTIFIER_NODE
);
9257 code
= ENUMERAL_TYPE
;
9263 /* In case of anonymous name, xref_tag is only called to
9264 make type node and push name. Name lookup is not required. */
9265 if (ANON_AGGRNAME_P (name
))
9268 t
= lookup_and_check_tag (tag_code
, name
,
9269 scope
, template_header_p
);
9271 if (t
== error_mark_node
)
9272 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP
, error_mark_node
);
9274 if (scope
!= ts_current
&& t
&& current_class_type
9275 && template_class_depth (current_class_type
)
9276 && template_header_p
)
9278 /* Since SCOPE is not TS_CURRENT, we are not looking at a
9279 definition of this tag. Since, in addition, we are currently
9280 processing a (member) template declaration of a template
9281 class, we must be very careful; consider:
9288 { template <class V>
9289 friend struct S1; };
9291 Here, the S2::S1 declaration should not be confused with the
9292 outer declaration. In particular, the inner version should
9293 have a template parameter of level 2, not level 1. This
9294 would be particularly important if the member declaration
9297 template <class V = U> friend struct S1;
9299 say, when we should tsubst into `U' when instantiating
9300 S2. On the other hand, when presented with:
9310 we must find the inner binding eventually. We
9311 accomplish this by making sure that the new type we
9312 create to represent this declaration has the right
9314 context
= TYPE_CONTEXT (t
);
9320 /* If no such tag is yet defined, create a forward-reference node
9321 and record it as the "definition".
9322 When a real declaration of this type is found,
9323 the forward-reference will be altered into a real type. */
9324 if (code
== ENUMERAL_TYPE
)
9326 error ("use of enum %q#D without previous declaration", name
);
9327 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP
, error_mark_node
);
9331 t
= make_aggr_type (code
);
9332 TYPE_CONTEXT (t
) = context
;
9333 /* pushtag only cares whether SCOPE is zero or not. */
9334 t
= pushtag (name
, t
, scope
!= ts_current
);
9339 if (template_header_p
&& IS_AGGR_TYPE (t
))
9340 redeclare_class_template (t
, current_template_parms
);
9341 else if (!processing_template_decl
9343 && CLASSTYPE_IS_TEMPLATE (t
))
9345 error ("redeclaration of %qT as a non-template", t
);
9346 t
= error_mark_node
;
9350 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP
, t
);
9354 xref_tag_from_type (tree old
, tree id
, tag_scope scope
)
9356 enum tag_types tag_kind
;
9358 if (TREE_CODE (old
) == RECORD_TYPE
)
9359 tag_kind
= (CLASSTYPE_DECLARED_CLASS (old
) ? class_type
: record_type
);
9361 tag_kind
= union_type
;
9363 if (id
== NULL_TREE
)
9364 id
= TYPE_IDENTIFIER (old
);
9366 return xref_tag (tag_kind
, id
, scope
, false);
9369 /* Create the binfo hierarchy for REF with (possibly NULL) base list
9370 BASE_LIST. For each element on BASE_LIST the TREE_PURPOSE is an
9371 access_* node, and the TREE_VALUE is the type of the base-class.
9372 Non-NULL TREE_TYPE indicates virtual inheritance. */
9375 xref_basetypes (tree ref
, tree base_list
)
9378 tree binfo
, base_binfo
;
9379 unsigned max_vbases
= 0; /* Maximum direct & indirect virtual bases. */
9380 unsigned max_bases
= 0; /* Maximum direct bases. */
9382 tree default_access
;
9383 tree igo_prev
; /* Track Inheritance Graph Order. */
9385 if (ref
== error_mark_node
)
9388 /* The base of a derived class is private by default, all others are
9390 default_access
= (TREE_CODE (ref
) == RECORD_TYPE
9391 && CLASSTYPE_DECLARED_CLASS (ref
)
9392 ? access_private_node
: access_public_node
);
9394 /* First, make sure that any templates in base-classes are
9395 instantiated. This ensures that if we call ourselves recursively
9396 we do not get confused about which classes are marked and which
9401 tree basetype
= TREE_VALUE (*basep
);
9403 if (!(processing_template_decl
&& uses_template_parms (basetype
))
9404 && !complete_type_or_else (basetype
, NULL
))
9405 /* An incomplete type. Remove it from the list. */
9406 *basep
= TREE_CHAIN (*basep
);
9410 if (TREE_TYPE (*basep
))
9412 if (CLASS_TYPE_P (basetype
))
9413 max_vbases
+= VEC_length (tree
, CLASSTYPE_VBASECLASSES (basetype
));
9414 basep
= &TREE_CHAIN (*basep
);
9418 TYPE_MARKED_P (ref
) = 1;
9420 /* The binfo slot should be empty, unless this is an (ill-formed)
9422 gcc_assert (!TYPE_BINFO (ref
) || TYPE_SIZE (ref
));
9423 gcc_assert (TYPE_MAIN_VARIANT (ref
) == ref
);
9425 binfo
= make_tree_binfo (max_bases
);
9427 TYPE_BINFO (ref
) = binfo
;
9428 BINFO_OFFSET (binfo
) = size_zero_node
;
9429 BINFO_TYPE (binfo
) = ref
;
9433 BINFO_BASE_ACCESSES (binfo
) = VEC_alloc (tree
, max_bases
);
9434 /* An aggregate cannot have baseclasses. */
9435 CLASSTYPE_NON_AGGREGATE (ref
) = 1;
9437 if (TREE_CODE (ref
) == UNION_TYPE
)
9438 error ("derived union %qT invalid", ref
);
9443 if (TYPE_FOR_JAVA (ref
))
9444 error ("Java class %qT cannot have multiple bases", ref
);
9449 CLASSTYPE_VBASECLASSES (ref
) = VEC_alloc (tree
, max_vbases
);
9451 if (TYPE_FOR_JAVA (ref
))
9452 error ("Java class %qT cannot have virtual bases", ref
);
9455 for (igo_prev
= binfo
; base_list
; base_list
= TREE_CHAIN (base_list
))
9457 tree access
= TREE_PURPOSE (base_list
);
9458 int via_virtual
= TREE_TYPE (base_list
) != NULL_TREE
;
9459 tree basetype
= TREE_VALUE (base_list
);
9461 if (access
== access_default_node
)
9462 access
= default_access
;
9464 if (TREE_CODE (basetype
) == TYPE_DECL
)
9465 basetype
= TREE_TYPE (basetype
);
9466 if (TREE_CODE (basetype
) != RECORD_TYPE
9467 && TREE_CODE (basetype
) != TYPENAME_TYPE
9468 && TREE_CODE (basetype
) != TEMPLATE_TYPE_PARM
9469 && TREE_CODE (basetype
) != BOUND_TEMPLATE_TEMPLATE_PARM
)
9471 error ("base type %qT fails to be a struct or class type",
9476 if (TYPE_FOR_JAVA (basetype
) && (current_lang_depth () == 0))
9477 TYPE_FOR_JAVA (ref
) = 1;
9479 base_binfo
= NULL_TREE
;
9480 if (CLASS_TYPE_P (basetype
) && !dependent_type_p (basetype
))
9482 base_binfo
= TYPE_BINFO (basetype
);
9483 /* The original basetype could have been a typedef'd type. */
9484 basetype
= BINFO_TYPE (base_binfo
);
9486 /* Inherit flags from the base. */
9487 TYPE_HAS_NEW_OPERATOR (ref
)
9488 |= TYPE_HAS_NEW_OPERATOR (basetype
);
9489 TYPE_HAS_ARRAY_NEW_OPERATOR (ref
)
9490 |= TYPE_HAS_ARRAY_NEW_OPERATOR (basetype
);
9491 TYPE_GETS_DELETE (ref
) |= TYPE_GETS_DELETE (basetype
);
9492 TYPE_HAS_CONVERSION (ref
) |= TYPE_HAS_CONVERSION (basetype
);
9493 CLASSTYPE_DIAMOND_SHAPED_P (ref
)
9494 |= CLASSTYPE_DIAMOND_SHAPED_P (basetype
);
9495 CLASSTYPE_REPEATED_BASE_P (ref
)
9496 |= CLASSTYPE_REPEATED_BASE_P (basetype
);
9499 /* We must do this test after we've seen through a typedef
9501 if (TYPE_MARKED_P (basetype
))
9503 if (basetype
== ref
)
9504 error ("recursive type %qT undefined", basetype
);
9506 error ("duplicate base type %qT invalid", basetype
);
9509 TYPE_MARKED_P (basetype
) = 1;
9511 base_binfo
= copy_binfo (base_binfo
, basetype
, ref
,
9512 &igo_prev
, via_virtual
);
9513 if (!BINFO_INHERITANCE_CHAIN (base_binfo
))
9514 BINFO_INHERITANCE_CHAIN (base_binfo
) = binfo
;
9516 BINFO_BASE_APPEND (binfo
, base_binfo
);
9517 BINFO_BASE_ACCESS_APPEND (binfo
, access
);
9520 if (VEC_space (tree
, CLASSTYPE_VBASECLASSES (ref
), 1))
9521 /* If we have space in the vbase vector, we must have shared at
9522 least one of them, and are therefore diamond shaped. */
9523 CLASSTYPE_DIAMOND_SHAPED_P (ref
) = 1;
9525 /* Unmark all the types. */
9526 for (i
= 0; BINFO_BASE_ITERATE (binfo
, i
, base_binfo
); i
++)
9527 TYPE_MARKED_P (BINFO_TYPE (base_binfo
)) = 0;
9528 TYPE_MARKED_P (ref
) = 0;
9530 /* Now see if we have a repeated base type. */
9531 if (!CLASSTYPE_REPEATED_BASE_P (ref
))
9533 for (base_binfo
= binfo
; base_binfo
;
9534 base_binfo
= TREE_CHAIN (base_binfo
))
9536 if (TYPE_MARKED_P (BINFO_TYPE (base_binfo
)))
9538 CLASSTYPE_REPEATED_BASE_P (ref
) = 1;
9541 TYPE_MARKED_P (BINFO_TYPE (base_binfo
)) = 1;
9543 for (base_binfo
= binfo
; base_binfo
;
9544 base_binfo
= TREE_CHAIN (base_binfo
))
9545 if (TYPE_MARKED_P (BINFO_TYPE (base_binfo
)))
9546 TYPE_MARKED_P (BINFO_TYPE (base_binfo
)) = 0;
9553 /* Begin compiling the definition of an enumeration type.
9555 Returns the type object, as yet incomplete.
9556 Also records info about it so that build_enumerator
9557 may be used to declare the individual values as they are read. */
9560 start_enum (tree name
)
9564 gcc_assert (TREE_CODE (name
) == IDENTIFIER_NODE
);
9566 /* If this is the real definition for a previous forward reference,
9567 fill in the contents in the same object that used to be the
9568 forward reference. */
9570 enumtype
= lookup_and_check_tag (enum_type
, name
,
9571 /*tag_scope=*/ts_current
,
9572 /*template_header_p=*/false);
9574 if (enumtype
!= NULL_TREE
&& TREE_CODE (enumtype
) == ENUMERAL_TYPE
)
9576 error ("multiple definition of %q#T", enumtype
);
9577 error ("%Jprevious definition here", TYPE_MAIN_DECL (enumtype
));
9578 /* Clear out TYPE_VALUES, and start again. */
9579 TYPE_VALUES (enumtype
) = NULL_TREE
;
9583 /* In case of error, make a dummy enum to allow parsing to
9585 if (enumtype
== error_mark_node
)
9586 name
= make_anon_name ();
9588 enumtype
= make_node (ENUMERAL_TYPE
);
9589 enumtype
= pushtag (name
, enumtype
, 0);
9595 /* After processing and defining all the values of an enumeration type,
9596 install their decls in the enumeration type and finish it off.
9597 ENUMTYPE is the type object and VALUES a list of name-value pairs. */
9600 finish_enum (tree enumtype
)
9609 bool use_short_enum
;
9613 integer_type_kind itk
;
9614 tree underlying_type
= NULL_TREE
;
9616 /* We built up the VALUES in reverse order. */
9617 TYPE_VALUES (enumtype
) = nreverse (TYPE_VALUES (enumtype
));
9619 /* For an enum defined in a template, just set the type of the values;
9620 all further processing is postponed until the template is
9621 instantiated. We need to set the type so that tsubst of a CONST_DECL
9623 if (processing_template_decl
)
9625 for (values
= TYPE_VALUES (enumtype
);
9627 values
= TREE_CHAIN (values
))
9628 TREE_TYPE (TREE_VALUE (values
)) = enumtype
;
9629 if (at_function_scope_p ())
9630 add_stmt (build_min (TAG_DEFN
, enumtype
));
9634 /* Determine the minimum and maximum values of the enumerators. */
9635 if (TYPE_VALUES (enumtype
))
9637 minnode
= maxnode
= NULL_TREE
;
9639 for (values
= TYPE_VALUES (enumtype
);
9641 values
= TREE_CHAIN (values
))
9643 decl
= TREE_VALUE (values
);
9645 /* [dcl.enum]: Following the closing brace of an enum-specifier,
9646 each enumerator has the type of its enumeration. Prior to the
9647 closing brace, the type of each enumerator is the type of its
9648 initializing value. */
9649 TREE_TYPE (decl
) = enumtype
;
9651 /* Update the minimum and maximum values, if appropriate. */
9652 value
= DECL_INITIAL (decl
);
9653 /* Figure out what the minimum and maximum values of the
9656 minnode
= maxnode
= value
;
9657 else if (tree_int_cst_lt (maxnode
, value
))
9659 else if (tree_int_cst_lt (value
, minnode
))
9666 If the enumerator-list is empty, the underlying type is as if
9667 the enumeration had a single enumerator with value 0. */
9668 minnode
= maxnode
= integer_zero_node
;
9670 /* Compute the number of bits require to represent all values of the
9671 enumeration. We must do this before the type of MINNODE and
9672 MAXNODE are transformed, since min_precision relies on the
9673 TREE_TYPE of the value it is passed. */
9674 unsignedp
= tree_int_cst_sgn (minnode
) >= 0;
9675 lowprec
= min_precision (minnode
, unsignedp
);
9676 highprec
= min_precision (maxnode
, unsignedp
);
9677 precision
= MAX (lowprec
, highprec
);
9679 /* Determine the underlying type of the enumeration.
9683 The underlying type of an enumeration is an integral type that
9684 can represent all the enumerator values defined in the
9685 enumeration. It is implementation-defined which integral type is
9686 used as the underlying type for an enumeration except that the
9687 underlying type shall not be larger than int unless the value of
9688 an enumerator cannot fit in an int or unsigned int.
9690 We use "int" or an "unsigned int" as the underlying type, even if
9691 a smaller integral type would work, unless the user has
9692 explicitly requested that we use the smallest possible type. The
9693 user can request that for all enumerations with a command line
9694 flag, or for just one enumeration with an attribute. */
9696 use_short_enum
= flag_short_enums
9697 || lookup_attribute ("packed", TYPE_ATTRIBUTES (enumtype
));
9699 for (itk
= (use_short_enum
? itk_char
: itk_int
);
9703 underlying_type
= integer_types
[itk
];
9704 if (TYPE_PRECISION (underlying_type
) >= precision
9705 && TYPE_UNSIGNED (underlying_type
) == unsignedp
)
9708 if (itk
== itk_none
)
9712 IF no integral type can represent all the enumerator values, the
9713 enumeration is ill-formed. */
9714 error ("no integral type can represent all of the enumerator values "
9715 "for %qT", enumtype
);
9716 precision
= TYPE_PRECISION (long_long_integer_type_node
);
9717 underlying_type
= integer_types
[itk_unsigned_long_long
];
9720 /* Compute the minium and maximum values for the type.
9724 For an enumeration where emin is the smallest enumerator and emax
9725 is the largest, the values of the enumeration are the values of the
9726 underlying type in the range bmin to bmax, where bmin and bmax are,
9727 respectively, the smallest and largest values of the smallest bit-
9728 field that can store emin and emax. */
9730 /* The middle-end currently assumes that types with TYPE_PRECISION
9731 narrower than their underlying type are suitably zero or sign
9732 extended to fill their mode. g++ doesn't make these guarantees.
9733 Until the middle-end can represent such paradoxical types, we
9734 set the TYPE_PRECISION to the width of the underlying type. */
9735 TYPE_PRECISION (enumtype
) = TYPE_PRECISION (underlying_type
);
9737 set_min_and_max_values_for_integral_type (enumtype
, precision
, unsignedp
);
9741 The value of sizeof() applied to an enumeration type, an object
9742 of an enumeration type, or an enumerator, is the value of sizeof()
9743 applied to the underlying type. */
9744 TYPE_SIZE (enumtype
) = TYPE_SIZE (underlying_type
);
9745 TYPE_SIZE_UNIT (enumtype
) = TYPE_SIZE_UNIT (underlying_type
);
9746 TYPE_MODE (enumtype
) = TYPE_MODE (underlying_type
);
9747 TYPE_ALIGN (enumtype
) = TYPE_ALIGN (underlying_type
);
9748 TYPE_USER_ALIGN (enumtype
) = TYPE_USER_ALIGN (underlying_type
);
9749 TYPE_UNSIGNED (enumtype
) = TYPE_UNSIGNED (underlying_type
);
9751 /* Convert each of the enumerators to the type of the underlying
9752 type of the enumeration. */
9753 for (values
= TYPE_VALUES (enumtype
); values
; values
= TREE_CHAIN (values
))
9755 decl
= TREE_VALUE (values
);
9756 value
= perform_implicit_conversion (underlying_type
,
9757 DECL_INITIAL (decl
));
9759 /* Do not clobber shared ints. */
9760 value
= copy_node (value
);
9762 TREE_TYPE (value
) = enumtype
;
9763 DECL_INITIAL (decl
) = value
;
9764 TREE_VALUE (values
) = value
;
9767 /* Fix up all variant types of this enum type. */
9768 for (t
= TYPE_MAIN_VARIANT (enumtype
); t
; t
= TYPE_NEXT_VARIANT (t
))
9770 TYPE_VALUES (t
) = TYPE_VALUES (enumtype
);
9771 TYPE_MIN_VALUE (t
) = TYPE_MIN_VALUE (enumtype
);
9772 TYPE_MAX_VALUE (t
) = TYPE_MAX_VALUE (enumtype
);
9773 TYPE_SIZE (t
) = TYPE_SIZE (enumtype
);
9774 TYPE_SIZE_UNIT (t
) = TYPE_SIZE_UNIT (enumtype
);
9775 TYPE_MODE (t
) = TYPE_MODE (enumtype
);
9776 TYPE_PRECISION (t
) = TYPE_PRECISION (enumtype
);
9777 TYPE_ALIGN (t
) = TYPE_ALIGN (enumtype
);
9778 TYPE_USER_ALIGN (t
) = TYPE_USER_ALIGN (enumtype
);
9779 TYPE_UNSIGNED (t
) = TYPE_UNSIGNED (enumtype
);
9782 /* Finish debugging output for this type. */
9783 rest_of_type_compilation (enumtype
, namespace_bindings_p ());
9786 /* Build and install a CONST_DECL for an enumeration constant of the
9787 enumeration type ENUMTYPE whose NAME and VALUE (if any) are provided.
9788 Assignment of sequential values by default is handled here. */
9791 build_enumerator (tree name
, tree value
, tree enumtype
)
9797 /* Remove no-op casts from the value. */
9799 STRIP_TYPE_NOPS (value
);
9801 if (! processing_template_decl
)
9803 /* Validate and default VALUE. */
9804 if (value
!= NULL_TREE
)
9806 value
= integral_constant_value (value
);
9808 if (TREE_CODE (value
) == INTEGER_CST
)
9810 value
= perform_integral_promotions (value
);
9811 constant_expression_warning (value
);
9815 error ("enumerator value for %qD not integer constant", name
);
9820 /* Default based on previous value. */
9821 if (value
== NULL_TREE
)
9823 if (TYPE_VALUES (enumtype
))
9826 unsigned HOST_WIDE_INT lo
;
9830 /* The next value is the previous value plus one. We can
9831 safely assume that the previous value is an INTEGER_CST.
9832 add_double doesn't know the type of the target expression,
9833 so we must check with int_fits_type_p as well. */
9834 prev_value
= DECL_INITIAL (TREE_VALUE (TYPE_VALUES (enumtype
)));
9835 overflowed
= add_double (TREE_INT_CST_LOW (prev_value
),
9836 TREE_INT_CST_HIGH (prev_value
),
9838 value
= build_int_cst_wide (TREE_TYPE (prev_value
), lo
, hi
);
9839 overflowed
|= !int_fits_type_p (value
, TREE_TYPE (prev_value
));
9842 error ("overflow in enumeration values at %qD", name
);
9845 value
= integer_zero_node
;
9848 /* Remove no-op casts from the value. */
9849 STRIP_TYPE_NOPS (value
);
9852 /* C++ associates enums with global, function, or class declarations. */
9853 context
= current_scope ();
9855 /* Build the actual enumeration constant. Note that the enumeration
9856 constants have the type of their initializers until the
9857 enumeration is complete:
9861 Following the closing brace of an enum-specifier, each enumer-
9862 ator has the type of its enumeration. Prior to the closing
9863 brace, the type of each enumerator is the type of its
9866 In finish_enum we will reset the type. Of course, if we're
9867 processing a template, there may be no value. */
9868 type
= value
? TREE_TYPE (value
) : NULL_TREE
;
9870 if (context
&& context
== current_class_type
)
9871 /* This enum declaration is local to the class. We need the full
9872 lang_decl so that we can record DECL_CLASS_CONTEXT, for example. */
9873 decl
= build_lang_decl (CONST_DECL
, name
, type
);
9875 /* It's a global enum, or it's local to a function. (Note local to
9876 a function could mean local to a class method. */
9877 decl
= build_decl (CONST_DECL
, name
, type
);
9879 DECL_CONTEXT (decl
) = FROB_CONTEXT (context
);
9880 TREE_CONSTANT (decl
) = 1;
9881 TREE_INVARIANT (decl
) = 1;
9882 TREE_READONLY (decl
) = 1;
9883 DECL_INITIAL (decl
) = value
;
9885 if (context
&& context
== current_class_type
)
9886 /* In something like `struct S { enum E { i = 7 }; };' we put `i'
9887 on the TYPE_FIELDS list for `S'. (That's so that you can say
9888 things like `S::i' later.) */
9889 finish_member_declaration (decl
);
9893 /* Add this enumeration constant to the list for this type. */
9894 TYPE_VALUES (enumtype
) = tree_cons (name
, decl
, TYPE_VALUES (enumtype
));
9898 /* We're defining DECL. Make sure that it's type is OK. */
9901 check_function_type (tree decl
, tree current_function_parms
)
9903 tree fntype
= TREE_TYPE (decl
);
9904 tree return_type
= complete_type (TREE_TYPE (fntype
));
9906 /* In a function definition, arg types must be complete. */
9907 require_complete_types_for_parms (current_function_parms
);
9909 if (dependent_type_p (return_type
))
9911 if (!COMPLETE_OR_VOID_TYPE_P (return_type
))
9913 error ("return type %q#T is incomplete", TREE_TYPE (fntype
));
9915 /* Make it return void instead, but don't change the
9916 type of the DECL_RESULT, in case we have a named return value. */
9917 if (TREE_CODE (fntype
) == METHOD_TYPE
)
9919 tree ctype
= TREE_TYPE (TREE_VALUE (TYPE_ARG_TYPES (fntype
)));
9921 = build_method_type_directly (ctype
,
9923 FUNCTION_ARG_CHAIN (decl
));
9927 = build_function_type (void_type_node
,
9928 TYPE_ARG_TYPES (TREE_TYPE (decl
)));
9930 = build_exception_variant (fntype
,
9931 TYPE_RAISES_EXCEPTIONS (fntype
));
9934 abstract_virtuals_error (decl
, TREE_TYPE (fntype
));
9937 /* Create the FUNCTION_DECL for a function definition.
9938 DECLSPECS and DECLARATOR are the parts of the declaration;
9939 they describe the function's name and the type it returns,
9940 but twisted together in a fashion that parallels the syntax of C.
9942 FLAGS is a bitwise or of SF_PRE_PARSED (indicating that the
9943 DECLARATOR is really the DECL for the function we are about to
9944 process and that DECLSPECS should be ignored), SF_INCLASS_INLINE
9945 indicating that the function is an inline defined in-class.
9947 This function creates a binding context for the function body
9948 as well as setting up the FUNCTION_DECL in current_function_decl.
9950 For C++, we must first check whether that datum makes any sense.
9951 For example, "class A local_a(1,2);" means that variable local_a
9952 is an aggregate of type A, which should have a constructor
9953 applied to it with the argument list [1, 2]. */
9956 start_preparsed_function (tree decl1
, tree attrs
, int flags
)
9958 tree ctype
= NULL_TREE
;
9961 int doing_friend
= 0;
9962 struct cp_binding_level
*bl
;
9963 tree current_function_parms
;
9964 struct c_fileinfo
*finfo
= get_fileinfo (lbasename (input_filename
));
9967 gcc_assert (TREE_CODE (TREE_VALUE (void_list_node
)) == VOID_TYPE
);
9968 gcc_assert (TREE_CHAIN (void_list_node
) == NULL_TREE
);
9970 fntype
= TREE_TYPE (decl1
);
9971 if (TREE_CODE (fntype
) == METHOD_TYPE
)
9972 ctype
= TYPE_METHOD_BASETYPE (fntype
);
9974 /* ISO C++ 11.4/5. A friend function defined in a class is in
9975 the (lexical) scope of the class in which it is defined. */
9976 if (!ctype
&& DECL_FRIEND_P (decl1
))
9978 ctype
= DECL_FRIEND_CONTEXT (decl1
);
9980 /* CTYPE could be null here if we're dealing with a template;
9981 for example, `inline friend float foo()' inside a template
9982 will have no CTYPE set. */
9983 if (ctype
&& TREE_CODE (ctype
) != RECORD_TYPE
)
9989 if (DECL_DECLARED_INLINE_P (decl1
)
9990 && lookup_attribute ("noinline", attrs
))
9991 warning ("%Jinline function %qD given attribute noinline", decl1
, decl1
);
9993 if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (decl1
))
9994 /* This is a constructor, we must ensure that any default args
9995 introduced by this definition are propagated to the clones
9996 now. The clones are used directly in overload resolution. */
9997 adjust_clone_args (decl1
);
9999 /* Sometimes we don't notice that a function is a static member, and
10000 build a METHOD_TYPE for it. Fix that up now. */
10001 if (ctype
!= NULL_TREE
&& DECL_STATIC_FUNCTION_P (decl1
)
10002 && TREE_CODE (TREE_TYPE (decl1
)) == METHOD_TYPE
)
10004 revert_static_member_fn (decl1
);
10008 /* Set up current_class_type, and enter the scope of the class, if
10011 push_nested_class (ctype
);
10012 else if (DECL_STATIC_FUNCTION_P (decl1
))
10013 push_nested_class (DECL_CONTEXT (decl1
));
10015 /* Now that we have entered the scope of the class, we must restore
10016 the bindings for any template parameters surrounding DECL1, if it
10017 is an inline member template. (Order is important; consider the
10018 case where a template parameter has the same name as a field of
10019 the class.) It is not until after this point that
10020 PROCESSING_TEMPLATE_DECL is guaranteed to be set up correctly. */
10021 if (flags
& SF_INCLASS_INLINE
)
10022 maybe_begin_member_template_processing (decl1
);
10024 /* Effective C++ rule 15. */
10026 && DECL_OVERLOADED_OPERATOR_P (decl1
) == NOP_EXPR
10027 && TREE_CODE (TREE_TYPE (fntype
)) == VOID_TYPE
)
10028 warning ("%<operator=%> should return a reference to %<*this%>");
10030 /* Make the init_value nonzero so pushdecl knows this is not tentative.
10031 error_mark_node is replaced below (in poplevel) with the BLOCK. */
10032 if (!DECL_INITIAL (decl1
))
10033 DECL_INITIAL (decl1
) = error_mark_node
;
10035 /* This function exists in static storage.
10036 (This does not mean `static' in the C sense!) */
10037 TREE_STATIC (decl1
) = 1;
10039 /* We must call push_template_decl after current_class_type is set
10040 up. (If we are processing inline definitions after exiting a
10041 class scope, current_class_type will be NULL_TREE until set above
10042 by push_nested_class.) */
10043 if (processing_template_decl
)
10044 decl1
= push_template_decl (decl1
);
10046 /* We are now in the scope of the function being defined. */
10047 current_function_decl
= decl1
;
10049 /* Save the parm names or decls from this function's declarator
10050 where store_parm_decls will find them. */
10051 current_function_parms
= DECL_ARGUMENTS (decl1
);
10053 /* Make sure the parameter and return types are reasonable. When
10054 you declare a function, these types can be incomplete, but they
10055 must be complete when you define the function. */
10056 check_function_type (decl1
, current_function_parms
);
10058 /* Build the return declaration for the function. */
10059 restype
= TREE_TYPE (fntype
);
10060 /* Promote the value to int before returning it. */
10061 if (c_promoting_integer_type_p (restype
))
10062 restype
= type_promotes_to (restype
);
10063 if (DECL_RESULT (decl1
) == NULL_TREE
)
10067 resdecl
= build_decl (RESULT_DECL
, 0, TYPE_MAIN_VARIANT (restype
));
10068 DECL_ARTIFICIAL (resdecl
) = 1;
10069 DECL_IGNORED_P (resdecl
) = 1;
10070 DECL_RESULT (decl1
) = resdecl
;
10072 c_apply_type_quals_to_decl (cp_type_quals (restype
), resdecl
);
10075 /* Initialize RTL machinery. We cannot do this until
10076 CURRENT_FUNCTION_DECL and DECL_RESULT are set up. We do this
10077 even when processing a template; this is how we get
10078 CFUN set up, and our per-function variables initialized.
10079 FIXME factor out the non-RTL stuff. */
10080 bl
= current_binding_level
;
10081 allocate_struct_function (decl1
);
10082 current_binding_level
= bl
;
10084 /* Even though we're inside a function body, we still don't want to
10085 call expand_expr to calculate the size of a variable-sized array.
10086 We haven't necessarily assigned RTL to all variables yet, so it's
10087 not safe to try to expand expressions involving them. */
10088 cfun
->x_dont_save_pending_sizes_p
= 1;
10090 /* Start the statement-tree, start the tree now. */
10091 DECL_SAVED_TREE (decl1
) = push_stmt_list ();
10093 /* Let the user know we're compiling this function. */
10094 announce_function (decl1
);
10096 /* Record the decl so that the function name is defined.
10097 If we already have a decl for this name, and it is a FUNCTION_DECL,
10098 use the old decl. */
10099 if (!processing_template_decl
&& !(flags
& SF_PRE_PARSED
))
10101 /* A specialization is not used to guide overload resolution. */
10102 if (!DECL_FUNCTION_MEMBER_P (decl1
)
10103 && !(DECL_USE_TEMPLATE (decl1
) &&
10104 PRIMARY_TEMPLATE_P (DECL_TI_TEMPLATE (decl1
))))
10106 tree olddecl
= pushdecl (decl1
);
10108 if (olddecl
== error_mark_node
)
10109 /* If something went wrong when registering the declaration,
10110 use DECL1; we have to have a FUNCTION_DECL to use when
10111 parsing the body of the function. */
10114 /* Otherwise, OLDDECL is either a previous declaration of
10115 the same function or DECL1 itself. */
10120 /* We need to set the DECL_CONTEXT. */
10121 if (!DECL_CONTEXT (decl1
) && DECL_TEMPLATE_INFO (decl1
))
10122 DECL_CONTEXT (decl1
) = DECL_CONTEXT (DECL_TI_TEMPLATE (decl1
));
10123 /* And make sure we have enough default args. */
10124 check_default_args (decl1
);
10126 fntype
= TREE_TYPE (decl1
);
10129 /* Determine the ELF visibility attribute for the function. We must
10130 not do this before calling "pushdecl", as we must allow
10131 "duplicate_decls" to merge any attributes appropriately. */
10132 if (!DECL_CLONED_FUNCTION_P (decl1
))
10133 determine_visibility (decl1
);
10135 /* Reset these in case the call to pushdecl changed them. */
10136 current_function_decl
= decl1
;
10137 cfun
->decl
= decl1
;
10139 /* If we are (erroneously) defining a function that we have already
10140 defined before, wipe out what we knew before. */
10141 if (!DECL_PENDING_INLINE_P (decl1
))
10142 DECL_SAVED_FUNCTION_DATA (decl1
) = NULL
;
10144 if (ctype
&& !doing_friend
&& !DECL_STATIC_FUNCTION_P (decl1
))
10146 /* We know that this was set up by `grokclassfn'. We do not
10147 wait until `store_parm_decls', since evil parse errors may
10148 never get us to that point. Here we keep the consistency
10149 between `current_class_type' and `current_class_ptr'. */
10150 tree t
= DECL_ARGUMENTS (decl1
);
10152 gcc_assert (t
!= NULL_TREE
&& TREE_CODE (t
) == PARM_DECL
);
10153 gcc_assert (TREE_CODE (TREE_TYPE (t
)) == POINTER_TYPE
);
10155 cp_function_chain
->x_current_class_ref
10156 = build_indirect_ref (t
, NULL
);
10157 cp_function_chain
->x_current_class_ptr
= t
;
10159 /* Constructors and destructors need to know whether they're "in
10160 charge" of initializing virtual base classes. */
10161 t
= TREE_CHAIN (t
);
10162 if (DECL_HAS_IN_CHARGE_PARM_P (decl1
))
10164 current_in_charge_parm
= t
;
10165 t
= TREE_CHAIN (t
);
10167 if (DECL_HAS_VTT_PARM_P (decl1
))
10169 gcc_assert (DECL_NAME (t
) == vtt_parm_identifier
);
10170 current_vtt_parm
= t
;
10174 if (DECL_INTERFACE_KNOWN (decl1
))
10176 tree ctx
= decl_function_context (decl1
);
10178 if (DECL_NOT_REALLY_EXTERN (decl1
))
10179 DECL_EXTERNAL (decl1
) = 0;
10181 if (ctx
!= NULL_TREE
&& DECL_DECLARED_INLINE_P (ctx
)
10182 && TREE_PUBLIC (ctx
))
10183 /* This is a function in a local class in an extern inline
10185 comdat_linkage (decl1
);
10187 /* If this function belongs to an interface, it is public.
10188 If it belongs to someone else's interface, it is also external.
10189 This only affects inlines and template instantiations. */
10190 else if (finfo
->interface_unknown
== 0
10191 && ! DECL_TEMPLATE_INSTANTIATION (decl1
))
10193 if (DECL_DECLARED_INLINE_P (decl1
)
10194 || DECL_TEMPLATE_INSTANTIATION (decl1
)
10195 || processing_template_decl
)
10197 DECL_EXTERNAL (decl1
)
10198 = (finfo
->interface_only
10199 || (DECL_DECLARED_INLINE_P (decl1
)
10200 && ! flag_implement_inlines
10201 && !DECL_VINDEX (decl1
)));
10203 /* For WIN32 we also want to put these in linkonce sections. */
10204 maybe_make_one_only (decl1
);
10207 DECL_EXTERNAL (decl1
) = 0;
10208 DECL_NOT_REALLY_EXTERN (decl1
) = 0;
10209 DECL_INTERFACE_KNOWN (decl1
) = 1;
10210 /* If this function is in an interface implemented in this file,
10211 make sure that the backend knows to emit this function
10213 if (!DECL_EXTERNAL (decl1
))
10214 mark_needed (decl1
);
10216 else if (finfo
->interface_unknown
&& finfo
->interface_only
10217 && ! DECL_TEMPLATE_INSTANTIATION (decl1
))
10219 /* If MULTIPLE_SYMBOL_SPACES is defined and we saw a #pragma
10220 interface, we will have both finfo->interface_unknown and
10221 finfo->interface_only set. In that case, we don't want to
10222 use the normal heuristics because someone will supply a
10223 #pragma implementation elsewhere, and deducing it here would
10224 produce a conflict. */
10225 comdat_linkage (decl1
);
10226 DECL_EXTERNAL (decl1
) = 0;
10227 DECL_INTERFACE_KNOWN (decl1
) = 1;
10228 DECL_DEFER_OUTPUT (decl1
) = 1;
10232 /* This is a definition, not a reference.
10233 So clear DECL_EXTERNAL. */
10234 DECL_EXTERNAL (decl1
) = 0;
10236 if ((DECL_DECLARED_INLINE_P (decl1
)
10237 || DECL_TEMPLATE_INSTANTIATION (decl1
))
10238 && ! DECL_INTERFACE_KNOWN (decl1
)
10239 /* Don't try to defer nested functions for now. */
10240 && ! decl_function_context (decl1
))
10241 DECL_DEFER_OUTPUT (decl1
) = 1;
10243 DECL_INTERFACE_KNOWN (decl1
) = 1;
10246 begin_scope (sk_function_parms
, decl1
);
10250 if (DECL_DESTRUCTOR_P (decl1
)
10251 || (DECL_CONSTRUCTOR_P (decl1
)
10252 && targetm
.cxx
.cdtor_returns_this ()))
10254 cdtor_label
= build_decl (LABEL_DECL
, NULL_TREE
, NULL_TREE
);
10255 DECL_CONTEXT (cdtor_label
) = current_function_decl
;
10258 start_fname_decls ();
10260 store_parm_decls (current_function_parms
);
10264 /* Like start_preparsed_function, except that instead of a
10265 FUNCTION_DECL, this function takes DECLSPECS and DECLARATOR.
10267 Returns 1 on success. If the DECLARATOR is not suitable for a function
10268 (it defines a datum instead), we return 0, which tells
10269 yyparse to report a parse error. */
10272 start_function (cp_decl_specifier_seq
*declspecs
,
10273 const cp_declarator
*declarator
,
10278 if (have_extern_spec
)
10280 declspecs
->storage_class
= sc_extern
;
10281 /* This should only be done once on the outermost decl. */
10282 have_extern_spec
= false;
10285 decl1
= grokdeclarator (declarator
, declspecs
, FUNCDEF
, 1, &attrs
);
10286 /* If the declarator is not suitable for a function definition,
10287 cause a syntax error. */
10288 if (decl1
== NULL_TREE
|| TREE_CODE (decl1
) != FUNCTION_DECL
)
10291 /* If #pragma weak was used, mark the decl weak now. */
10292 if (global_scope_p (current_binding_level
))
10293 maybe_apply_pragma_weak (decl1
);
10295 if (DECL_MAIN_P (decl1
))
10296 /* main must return int. grokfndecl should have corrected it
10297 (and issued a diagnostic) if the user got it wrong. */
10298 gcc_assert (same_type_p (TREE_TYPE (TREE_TYPE (decl1
)),
10299 integer_type_node
));
10301 start_preparsed_function (decl1
, attrs
, /*flags=*/SF_DEFAULT
);
10306 /* Store the parameter declarations into the current function declaration.
10307 This is called after parsing the parameter declarations, before
10308 digesting the body of the function.
10310 Also install to binding contour return value identifier, if any. */
10313 store_parm_decls (tree current_function_parms
)
10315 tree fndecl
= current_function_decl
;
10318 /* This is a chain of any other decls that came in among the parm
10319 declarations. If a parm is declared with enum {foo, bar} x;
10320 then CONST_DECLs for foo and bar are put here. */
10321 tree nonparms
= NULL_TREE
;
10323 if (current_function_parms
)
10325 /* This case is when the function was defined with an ANSI prototype.
10326 The parms already have decls, so we need not do anything here
10327 except record them as in effect
10328 and complain if any redundant old-style parm decls were written. */
10330 tree specparms
= current_function_parms
;
10333 /* Must clear this because it might contain TYPE_DECLs declared
10335 current_binding_level
->names
= NULL
;
10337 /* If we're doing semantic analysis, then we'll call pushdecl
10338 for each of these. We must do them in reverse order so that
10339 they end in the correct forward order. */
10340 specparms
= nreverse (specparms
);
10342 for (parm
= specparms
; parm
; parm
= next
)
10344 next
= TREE_CHAIN (parm
);
10345 if (TREE_CODE (parm
) == PARM_DECL
)
10347 if (DECL_NAME (parm
) == NULL_TREE
10348 || TREE_CODE (parm
) != VOID_TYPE
)
10351 error ("parameter %qD declared void", parm
);
10355 /* If we find an enum constant or a type tag,
10356 put it aside for the moment. */
10357 TREE_CHAIN (parm
) = NULL_TREE
;
10358 nonparms
= chainon (nonparms
, parm
);
10362 /* Get the decls in their original chain order and record in the
10363 function. This is all and only the PARM_DECLs that were
10364 pushed into scope by the loop above. */
10365 DECL_ARGUMENTS (fndecl
) = getdecls ();
10368 DECL_ARGUMENTS (fndecl
) = NULL_TREE
;
10370 /* Now store the final chain of decls for the arguments
10371 as the decl-chain of the current lexical scope.
10372 Put the enumerators in as well, at the front so that
10373 DECL_ARGUMENTS is not modified. */
10374 current_binding_level
->names
= chainon (nonparms
, DECL_ARGUMENTS (fndecl
));
10376 /* For a cloned function, we've already got all the code we need;
10377 there's no need to add any extra bits. */
10378 if (!DECL_CLONED_FUNCTION_P (fndecl
))
10380 /* Do the starting of the exception specifications, if we have any. */
10381 if (flag_exceptions
&& !processing_template_decl
10382 && flag_enforce_eh_specs
10383 && TYPE_RAISES_EXCEPTIONS (TREE_TYPE (current_function_decl
)))
10384 current_eh_spec_block
= begin_eh_spec_block ();
10389 /* We have finished doing semantic analysis on DECL, but have not yet
10390 generated RTL for its body. Save away our current state, so that
10391 when we want to generate RTL later we know what to do. */
10394 save_function_data (tree decl
)
10396 struct language_function
*f
;
10398 /* Save the language-specific per-function data so that we can
10399 get it back when we really expand this function. */
10400 gcc_assert (!DECL_PENDING_INLINE_P (decl
));
10403 f
= GGC_NEW (struct language_function
);
10404 memcpy (f
, cp_function_chain
, sizeof (struct language_function
));
10405 DECL_SAVED_FUNCTION_DATA (decl
) = f
;
10407 /* Clear out the bits we don't need. */
10408 f
->base
.x_stmt_tree
.x_cur_stmt_list
= NULL_TREE
;
10409 f
->x_named_label_uses
= NULL
;
10410 f
->bindings
= NULL
;
10411 f
->x_local_names
= NULL
;
10415 /* Set the return value of the constructor (if present). */
10418 finish_constructor_body (void)
10423 if (targetm
.cxx
.cdtor_returns_this ())
10425 /* Any return from a constructor will end up here. */
10426 add_stmt (build_stmt (LABEL_EXPR
, cdtor_label
));
10428 val
= DECL_ARGUMENTS (current_function_decl
);
10429 val
= build2 (MODIFY_EXPR
, TREE_TYPE (val
),
10430 DECL_RESULT (current_function_decl
), val
);
10431 /* Return the address of the object. */
10432 exprstmt
= build_stmt (RETURN_EXPR
, val
);
10433 add_stmt (exprstmt
);
10437 /* Do all the processing for the beginning of a destructor; set up the
10438 vtable pointers and cleanups for bases and members. */
10441 begin_destructor_body (void)
10444 tree compound_stmt
;
10446 /* If the dtor is empty, and we know there is not any possible
10447 way we could use any vtable entries, before they are possibly
10448 set by a base class dtor, we don't have to setup the vtables,
10449 as we know that any base class dtor will set up any vtables
10450 it needs. We avoid MI, because one base class dtor can do a
10451 virtual dispatch to an overridden function that would need to
10452 have a non-related vtable set up, we cannot avoid setting up
10453 vtables in that case. We could change this to see if there
10454 is just one vtable.
10456 ??? In the destructor for a class, the vtables are set
10457 appropriately for that class. There will be no non-related
10458 vtables. jason 2001-12-11. */
10459 if_stmt
= begin_if_stmt ();
10461 /* If it is not safe to avoid setting up the vtables, then
10462 someone will change the condition to be boolean_true_node.
10463 (Actually, for now, we do not have code to set the condition
10464 appropriately, so we just assume that we always need to
10465 initialize the vtables.) */
10466 finish_if_stmt_cond (boolean_true_node
, if_stmt
);
10468 compound_stmt
= begin_compound_stmt (0);
10470 /* Make all virtual function table pointers in non-virtual base
10471 classes point to CURRENT_CLASS_TYPE's virtual function
10473 initialize_vtbl_ptrs (current_class_ptr
);
10475 finish_compound_stmt (compound_stmt
);
10476 finish_then_clause (if_stmt
);
10477 finish_if_stmt (if_stmt
);
10479 /* And insert cleanups for our bases and members so that they
10480 will be properly destroyed if we throw. */
10481 push_base_cleanups ();
10484 /* At the end of every destructor we generate code to delete the object if
10485 necessary. Do that now. */
10488 finish_destructor_body (void)
10492 /* Any return from a destructor will end up here; that way all base
10493 and member cleanups will be run when the function returns. */
10494 add_stmt (build_stmt (LABEL_EXPR
, cdtor_label
));
10496 /* In a virtual destructor, we must call delete. */
10497 if (DECL_VIRTUAL_P (current_function_decl
))
10500 tree virtual_size
= cxx_sizeof (current_class_type
);
10504 At the point of definition of a virtual destructor (including
10505 an implicit definition), non-placement operator delete shall
10506 be looked up in the scope of the destructor's class and if
10507 found shall be accessible and unambiguous. */
10508 exprstmt
= build_op_delete_call
10509 (DELETE_EXPR
, current_class_ptr
, virtual_size
,
10510 /*global_p=*/false, NULL_TREE
);
10512 if_stmt
= begin_if_stmt ();
10513 finish_if_stmt_cond (build2 (BIT_AND_EXPR
, integer_type_node
,
10514 current_in_charge_parm
,
10517 finish_expr_stmt (exprstmt
);
10518 finish_then_clause (if_stmt
);
10519 finish_if_stmt (if_stmt
);
10522 if (targetm
.cxx
.cdtor_returns_this ())
10526 val
= DECL_ARGUMENTS (current_function_decl
);
10527 val
= build2 (MODIFY_EXPR
, TREE_TYPE (val
),
10528 DECL_RESULT (current_function_decl
), val
);
10529 /* Return the address of the object. */
10530 exprstmt
= build_stmt (RETURN_EXPR
, val
);
10531 add_stmt (exprstmt
);
10535 /* Do the necessary processing for the beginning of a function body, which
10536 in this case includes member-initializers, but not the catch clauses of
10537 a function-try-block. Currently, this means opening a binding level
10538 for the member-initializers (in a ctor) and member cleanups (in a dtor).
10539 In other functions, this isn't necessary, but it doesn't hurt. */
10542 begin_function_body (void)
10546 if (processing_template_decl
)
10547 /* Do nothing now. */;
10549 /* Always keep the BLOCK node associated with the outermost pair of
10550 curly braces of a function. These are needed for correct
10551 operation of dwarfout.c. */
10552 keep_next_level (true);
10554 stmt
= begin_compound_stmt (BCS_FN_BODY
);
10556 if (processing_template_decl
)
10557 /* Do nothing now. */;
10558 else if (DECL_DESTRUCTOR_P (current_function_decl
))
10559 begin_destructor_body ();
10564 /* Do the processing for the end of a function body. Currently, this means
10565 closing out the cleanups for fully-constructed bases and members, and in
10566 the case of the destructor, deleting the object if desired. Again, this
10567 is only meaningful for [cd]tors, since they are the only functions where
10568 there is a significant distinction between the main body and any
10569 function catch clauses. Handling, say, main() return semantics here
10570 would be wrong, as flowing off the end of a function catch clause for
10571 main() would also need to return 0. */
10574 finish_function_body (tree compstmt
)
10576 /* Close the block. */
10577 finish_compound_stmt (compstmt
);
10579 if (processing_template_decl
)
10580 /* Do nothing now. */;
10581 else if (DECL_CONSTRUCTOR_P (current_function_decl
))
10582 finish_constructor_body ();
10583 else if (DECL_DESTRUCTOR_P (current_function_decl
))
10584 finish_destructor_body ();
10587 /* Finish up a function declaration and compile that function
10588 all the way to assembler language output. The free the storage
10589 for the function definition.
10591 FLAGS is a bitwise or of the following values:
10593 We just finished processing the body of an in-class inline
10594 function definition. (This processing will have taken place
10595 after the class definition is complete.) */
10598 finish_function (int flags
)
10600 tree fndecl
= current_function_decl
;
10601 tree fntype
, ctype
= NULL_TREE
;
10602 int inclass_inline
= (flags
& 2) != 0;
10605 /* When we get some parse errors, we can end up without a
10606 current_function_decl, so cope. */
10607 if (fndecl
== NULL_TREE
)
10608 return error_mark_node
;
10610 if (DECL_NONSTATIC_MEMBER_FUNCTION_P (fndecl
)
10611 && DECL_VIRTUAL_P (fndecl
)
10612 && !processing_template_decl
)
10614 tree fnclass
= DECL_CONTEXT (fndecl
);
10615 if (fndecl
== CLASSTYPE_KEY_METHOD (fnclass
))
10616 keyed_classes
= tree_cons (NULL_TREE
, fnclass
, keyed_classes
);
10619 nested
= function_depth
> 1;
10620 fntype
= TREE_TYPE (fndecl
);
10622 /* TREE_READONLY (fndecl) = 1;
10623 This caused &foo to be of type ptr-to-const-function
10624 which then got a warning when stored in a ptr-to-function variable. */
10626 gcc_assert (building_stmt_tree ());
10628 /* For a cloned function, we've already got all the code we need;
10629 there's no need to add any extra bits. */
10630 if (!DECL_CLONED_FUNCTION_P (fndecl
))
10632 if (DECL_MAIN_P (current_function_decl
))
10634 /* Make it so that `main' always returns 0 by default. */
10636 finish_return_stmt (integer_one_node
);
10638 finish_return_stmt (integer_zero_node
);
10642 /* Finish dealing with exception specifiers. */
10643 if (flag_exceptions
&& !processing_template_decl
10644 && flag_enforce_eh_specs
10645 && TYPE_RAISES_EXCEPTIONS (TREE_TYPE (current_function_decl
)))
10646 finish_eh_spec_block (TYPE_RAISES_EXCEPTIONS
10647 (TREE_TYPE (current_function_decl
)),
10648 current_eh_spec_block
);
10651 /* If we're saving up tree structure, tie off the function now. */
10652 DECL_SAVED_TREE (fndecl
) = pop_stmt_list (DECL_SAVED_TREE (fndecl
));
10654 finish_fname_decls ();
10656 /* If this function can't throw any exceptions, remember that. */
10657 if (!processing_template_decl
10658 && !cp_function_chain
->can_throw
10659 && !flag_non_call_exceptions
)
10660 TREE_NOTHROW (fndecl
) = 1;
10662 /* This must come after expand_function_end because cleanups might
10663 have declarations (from inline functions) that need to go into
10664 this function's blocks. */
10666 /* If the current binding level isn't the outermost binding level
10667 for this function, either there is a bug, or we have experienced
10668 syntax errors and the statement tree is malformed. */
10669 if (current_binding_level
->kind
!= sk_function_parms
)
10671 /* Make sure we have already experienced errors. */
10672 gcc_assert (errorcount
);
10674 /* Throw away the broken statement tree and extra binding
10676 DECL_SAVED_TREE (fndecl
) = alloc_stmt_list ();
10678 while (current_binding_level
->kind
!= sk_function_parms
)
10680 if (current_binding_level
->kind
== sk_class
)
10681 pop_nested_class ();
10683 poplevel (0, 0, 0);
10686 poplevel (1, 0, 1);
10688 /* Statements should always be full-expressions at the outermost set
10689 of curly braces for a function. */
10690 gcc_assert (stmts_are_full_exprs_p ());
10692 /* Set up the named return value optimization, if we can. Candidate
10693 variables are selected in check_return_value. */
10694 if (current_function_return_value
)
10696 tree r
= current_function_return_value
;
10699 if (r
!= error_mark_node
10700 /* This is only worth doing for fns that return in memory--and
10701 simpler, since we don't have to worry about promoted modes. */
10702 && aggregate_value_p (TREE_TYPE (TREE_TYPE (fndecl
)), fndecl
)
10703 /* Only allow this for variables declared in the outer scope of
10704 the function so we know that their lifetime always ends with a
10705 return; see g++.dg/opt/nrv6.C. We could be more flexible if
10706 we were to do this optimization in tree-ssa. */
10707 && (outer
= BLOCK_SUBBLOCKS (DECL_INITIAL (fndecl
)))
10708 /* Skip the artificial function body block. */
10709 && (outer
= BLOCK_SUBBLOCKS (outer
))
10710 && chain_member (r
, BLOCK_VARS (outer
)))
10711 finalize_nrv (&DECL_SAVED_TREE (fndecl
), r
, DECL_RESULT (fndecl
));
10713 current_function_return_value
= NULL_TREE
;
10716 /* Remember that we were in class scope. */
10717 if (current_class_name
)
10718 ctype
= current_class_type
;
10720 /* Must mark the RESULT_DECL as being in this function. */
10721 DECL_CONTEXT (DECL_RESULT (fndecl
)) = fndecl
;
10723 /* Set the BLOCK_SUPERCONTEXT of the outermost function scope to point
10724 to the FUNCTION_DECL node itself. */
10725 BLOCK_SUPERCONTEXT (DECL_INITIAL (fndecl
)) = fndecl
;
10727 /* Save away current state, if appropriate. */
10728 if (!processing_template_decl
)
10729 save_function_data (fndecl
);
10731 /* Complain if there's just no return statement. */
10732 if (warn_return_type
10733 && TREE_CODE (TREE_TYPE (fntype
)) != VOID_TYPE
10734 && !dependent_type_p (TREE_TYPE (fntype
))
10735 && !current_function_returns_value
&& !current_function_returns_null
10736 /* Don't complain if we abort or throw. */
10737 && !current_function_returns_abnormally
10738 && !DECL_NAME (DECL_RESULT (fndecl
))
10739 /* Normally, with -Wreturn-type, flow will complain. Unless we're an
10740 inline function, as we might never be compiled separately. */
10741 && (DECL_INLINE (fndecl
) || processing_template_decl
)
10742 /* Structor return values (if any) are set by the compiler. */
10743 && !DECL_CONSTRUCTOR_P (fndecl
)
10744 && !DECL_DESTRUCTOR_P (fndecl
))
10745 warning ("no return statement in function returning non-void");
10747 /* Store the end of the function, so that we get good line number
10748 info for the epilogue. */
10749 cfun
->function_end_locus
= input_location
;
10751 /* Genericize before inlining. */
10752 if (!processing_template_decl
)
10754 struct language_function
*f
= DECL_SAVED_FUNCTION_DATA (fndecl
);
10755 cp_genericize (fndecl
);
10756 /* Clear out the bits we don't need. */
10757 f
->x_current_class_ptr
= NULL
;
10758 f
->x_current_class_ref
= NULL
;
10759 f
->x_eh_spec_block
= NULL
;
10760 f
->x_in_charge_parm
= NULL
;
10761 f
->x_vtt_parm
= NULL
;
10762 f
->x_return_value
= NULL
;
10763 f
->bindings
= NULL
;
10765 /* Handle attribute((warn_unused_result)). Relies on gimple input. */
10766 c_warn_unused_result (&DECL_SAVED_TREE (fndecl
));
10768 /* Clear out the bits we don't need. */
10769 local_names
= NULL
;
10770 named_label_uses
= NULL
;
10772 /* We're leaving the context of this function, so zap cfun. It's still in
10773 DECL_STRUCT_FUNCTION, and we'll restore it in tree_rest_of_compilation. */
10775 current_function_decl
= NULL
;
10777 /* If this is an in-class inline definition, we may have to pop the
10778 bindings for the template parameters that we added in
10779 maybe_begin_member_template_processing when start_function was
10781 if (inclass_inline
)
10782 maybe_end_member_template_processing ();
10784 /* Leave the scope of the class. */
10786 pop_nested_class ();
10792 /* Let the error reporting routines know that we're outside a
10793 function. For a nested function, this value is used in
10794 cxx_pop_function_context and then reset via pop_function_context. */
10795 current_function_decl
= NULL_TREE
;
10800 /* Create the FUNCTION_DECL for a function definition.
10801 DECLSPECS and DECLARATOR are the parts of the declaration;
10802 they describe the return type and the name of the function,
10803 but twisted together in a fashion that parallels the syntax of C.
10805 This function creates a binding context for the function body
10806 as well as setting up the FUNCTION_DECL in current_function_decl.
10808 Returns a FUNCTION_DECL on success.
10810 If the DECLARATOR is not suitable for a function (it defines a datum
10811 instead), we return 0, which tells yyparse to report a parse error.
10813 May return void_type_node indicating that this method is actually
10814 a friend. See grokfield for more details.
10816 Came here with a `.pushlevel' .
10818 DO NOT MAKE ANY CHANGES TO THIS CODE WITHOUT MAKING CORRESPONDING
10819 CHANGES TO CODE IN `grokfield'. */
10822 start_method (cp_decl_specifier_seq
*declspecs
,
10823 const cp_declarator
*declarator
, tree attrlist
)
10825 tree fndecl
= grokdeclarator (declarator
, declspecs
, MEMFUNCDEF
, 0,
10828 if (fndecl
== error_mark_node
)
10829 return error_mark_node
;
10831 if (fndecl
== NULL
|| TREE_CODE (fndecl
) != FUNCTION_DECL
)
10833 error ("invalid member function declaration");
10834 return error_mark_node
;
10838 cplus_decl_attributes (&fndecl
, attrlist
, 0);
10840 /* Pass friends other than inline friend functions back. */
10841 if (fndecl
== void_type_node
)
10844 if (DECL_IN_AGGR_P (fndecl
))
10846 if (DECL_CONTEXT (fndecl
)
10847 && TREE_CODE( DECL_CONTEXT (fndecl
)) != NAMESPACE_DECL
)
10848 error ("%qD is already defined in class %qT", fndecl
,
10849 DECL_CONTEXT (fndecl
));
10850 return void_type_node
;
10853 check_template_shadow (fndecl
);
10855 DECL_DECLARED_INLINE_P (fndecl
) = 1;
10856 if (flag_default_inline
)
10857 DECL_INLINE (fndecl
) = 1;
10859 /* We process method specializations in finish_struct_1. */
10860 if (processing_template_decl
&& !DECL_TEMPLATE_SPECIALIZATION (fndecl
))
10862 fndecl
= push_template_decl (fndecl
);
10863 if (fndecl
== error_mark_node
)
10867 if (! DECL_FRIEND_P (fndecl
))
10869 if (TREE_CHAIN (fndecl
))
10871 fndecl
= copy_node (fndecl
);
10872 TREE_CHAIN (fndecl
) = NULL_TREE
;
10874 grok_special_member_properties (fndecl
);
10877 cp_finish_decl (fndecl
, NULL_TREE
, NULL_TREE
, 0);
10879 /* Make a place for the parms. */
10880 begin_scope (sk_function_parms
, fndecl
);
10882 DECL_IN_AGGR_P (fndecl
) = 1;
10886 /* Go through the motions of finishing a function definition.
10887 We don't compile this method until after the whole class has
10890 FINISH_METHOD must return something that looks as though it
10891 came from GROKFIELD (since we are defining a method, after all).
10893 This is called after parsing the body of the function definition.
10894 STMTS is the chain of statements that makes up the function body.
10896 DECL is the ..._DECL that `start_method' provided. */
10899 finish_method (tree decl
)
10901 tree fndecl
= decl
;
10906 if (decl
== void_type_node
)
10909 old_initial
= DECL_INITIAL (fndecl
);
10911 /* Undo the level for the parms (from start_method).
10912 This is like poplevel, but it causes nothing to be
10913 saved. Saving information here confuses symbol-table
10914 output routines. Besides, this information will
10915 be correctly output when this method is actually
10918 /* Clear out the meanings of the local variables of this level;
10919 also record in each decl which block it belongs to. */
10921 for (link
= current_binding_level
->names
; link
; link
= TREE_CHAIN (link
))
10923 if (DECL_NAME (link
) != NULL_TREE
)
10924 pop_binding (DECL_NAME (link
), link
);
10925 gcc_assert (TREE_CODE (link
) != FUNCTION_DECL
);
10926 DECL_CONTEXT (link
) = NULL_TREE
;
10929 poplevel (0, 0, 0);
10931 DECL_INITIAL (fndecl
) = old_initial
;
10933 /* We used to check if the context of FNDECL was different from
10934 current_class_type as another way to get inside here. This didn't work
10935 for String.cc in libg++. */
10936 if (DECL_FRIEND_P (fndecl
))
10938 VEC_safe_push (tree
, CLASSTYPE_INLINE_FRIENDS (current_class_type
),
10940 decl
= void_type_node
;
10947 /* VAR is a VAR_DECL. If its type is incomplete, remember VAR so that
10948 we can lay it out later, when and if its type becomes complete. */
10951 maybe_register_incomplete_var (tree var
)
10953 gcc_assert (TREE_CODE (var
) == VAR_DECL
);
10955 /* Keep track of variables with incomplete types. */
10956 if (!processing_template_decl
&& TREE_TYPE (var
) != error_mark_node
10957 && DECL_EXTERNAL (var
))
10959 tree inner_type
= TREE_TYPE (var
);
10961 while (TREE_CODE (inner_type
) == ARRAY_TYPE
)
10962 inner_type
= TREE_TYPE (inner_type
);
10963 inner_type
= TYPE_MAIN_VARIANT (inner_type
);
10965 if ((!COMPLETE_TYPE_P (inner_type
) && CLASS_TYPE_P (inner_type
))
10966 /* RTTI TD entries are created while defining the type_info. */
10967 || (TYPE_LANG_SPECIFIC (inner_type
)
10968 && TYPE_BEING_DEFINED (inner_type
)))
10969 incomplete_vars
= tree_cons (inner_type
, var
, incomplete_vars
);
10973 /* Called when a class type (given by TYPE) is defined. If there are
10974 any existing VAR_DECLs whose type hsa been completed by this
10975 declaration, update them now. */
10978 complete_vars (tree type
)
10980 tree
*list
= &incomplete_vars
;
10982 gcc_assert (CLASS_TYPE_P (type
));
10985 if (same_type_p (type
, TREE_PURPOSE (*list
)))
10987 tree var
= TREE_VALUE (*list
);
10988 /* Complete the type of the variable. The VAR_DECL itself
10989 will be laid out in expand_expr. */
10990 complete_type (TREE_TYPE (var
));
10991 /* Remove this entry from the list. */
10992 *list
= TREE_CHAIN (*list
);
10995 list
= &TREE_CHAIN (*list
);
10998 /* Check for pending declarations which may have abstract type. */
10999 complete_type_check_abstract (type
);
11002 /* If DECL is of a type which needs a cleanup, build that cleanup
11006 cxx_maybe_build_cleanup (tree decl
)
11008 tree type
= TREE_TYPE (decl
);
11010 if (type
!= error_mark_node
&& TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type
))
11012 int flags
= LOOKUP_NORMAL
|LOOKUP_DESTRUCTOR
;
11014 bool has_vbases
= (TREE_CODE (type
) == RECORD_TYPE
11015 && CLASSTYPE_VBASECLASSES (type
));
11017 if (TREE_CODE (type
) == ARRAY_TYPE
)
11021 cxx_mark_addressable (decl
);
11022 rval
= build_unary_op (ADDR_EXPR
, decl
, 0);
11025 /* Optimize for space over speed here. */
11026 if (!has_vbases
|| flag_expensive_optimizations
)
11027 flags
|= LOOKUP_NONVIRTUAL
;
11029 rval
= build_delete (TREE_TYPE (rval
), rval
,
11030 sfk_complete_destructor
, flags
, 0);
11032 if (has_vbases
&& !TYPE_HAS_DESTRUCTOR (type
))
11033 rval
= build_compound_expr (rval
, build_vbase_delete (type
, decl
));
11040 /* When a stmt has been parsed, this function is called. */
11047 /* DECL was originally constructed as a non-static member function,
11048 but turned out to be static. Update it accordingly. */
11051 revert_static_member_fn (tree decl
)
11054 tree function
= TREE_TYPE (decl
);
11055 tree args
= TYPE_ARG_TYPES (function
);
11057 if (cp_type_quals (TREE_TYPE (TREE_VALUE (args
)))
11058 != TYPE_UNQUALIFIED
)
11059 error ("static member function %q#D declared with type qualifiers", decl
);
11061 args
= TREE_CHAIN (args
);
11062 tmp
= build_function_type (TREE_TYPE (function
), args
);
11063 tmp
= build_qualified_type (tmp
, cp_type_quals (function
));
11064 tmp
= build_exception_variant (tmp
,
11065 TYPE_RAISES_EXCEPTIONS (function
));
11066 TREE_TYPE (decl
) = tmp
;
11067 if (DECL_ARGUMENTS (decl
))
11068 DECL_ARGUMENTS (decl
) = TREE_CHAIN (DECL_ARGUMENTS (decl
));
11069 DECL_STATIC_FUNCTION_P (decl
) = 1;
11072 /* Initialize the variables used during compilation of a C++
11076 cxx_push_function_context (struct function
* f
)
11078 struct language_function
*p
= GGC_CNEW (struct language_function
);
11081 /* Whenever we start a new function, we destroy temporaries in the
11083 current_stmt_tree ()->stmts_are_full_exprs_p
= 1;
11089 if (DECL_SAVED_FUNCTION_DATA (fn
))
11091 /* If we already parsed this function, and we're just expanding it
11092 now, restore saved state. */
11093 *cp_function_chain
= *DECL_SAVED_FUNCTION_DATA (fn
);
11095 /* We don't need the saved data anymore. Unless this is an inline
11096 function; we need the named return value info for
11097 declare_return_variable. */
11098 if (! DECL_INLINE (fn
))
11099 DECL_SAVED_FUNCTION_DATA (fn
) = NULL
;
11104 /* Free the language-specific parts of F, now that we've finished
11105 compiling the function. */
11108 cxx_pop_function_context (struct function
* f
)
11113 /* Return which tree structure is used by T, or TS_CP_GENERIC if T is
11114 one of the language-independent trees. */
11116 enum cp_tree_node_structure_enum
11117 cp_tree_node_structure (union lang_tree_node
* t
)
11119 switch (TREE_CODE (&t
->generic
))
11121 case DEFAULT_ARG
: return TS_CP_DEFAULT_ARG
;
11122 case IDENTIFIER_NODE
: return TS_CP_IDENTIFIER
;
11123 case OVERLOAD
: return TS_CP_OVERLOAD
;
11124 case TEMPLATE_PARM_INDEX
: return TS_CP_TPI
;
11125 case TINST_LEVEL
: return TS_CP_TINST_LEVEL
;
11126 case PTRMEM_CST
: return TS_CP_PTRMEM
;
11127 case BASELINK
: return TS_CP_BASELINK
;
11128 default: return TS_CP_GENERIC
;
11132 /* Build the void_list_node (void_type_node having been created). */
11134 build_void_list_node (void)
11136 tree t
= build_tree_list (NULL_TREE
, void_type_node
);
11141 cp_missing_noreturn_ok_p (tree decl
)
11143 /* A missing noreturn is ok for the `main' function. */
11144 return DECL_MAIN_P (decl
);
11147 /* Return the COMDAT group into which DECL should be placed. */
11150 cxx_comdat_group (tree decl
)
11154 /* Virtual tables, construction virtual tables, and virtual table
11155 tables all go in a single COMDAT group, named after the primary
11157 if (TREE_CODE (decl
) == VAR_DECL
&& DECL_VTABLE_OR_VTT_P (decl
))
11158 name
= DECL_ASSEMBLER_NAME (CLASSTYPE_VTABLES (DECL_CONTEXT (decl
)));
11159 /* For all other DECLs, the COMDAT group is the mangled name of the
11160 declaration itself. */
11162 name
= DECL_ASSEMBLER_NAME (decl
);
11164 return IDENTIFIER_POINTER (name
);
11167 #include "gt-cp-decl.h"